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* @module ol/util\n */\n\n/**\n * Inherit the prototype methods from one constructor into another.\n *\n * Usage:\n *\n * function ParentClass(a, b) { }\n * ParentClass.prototype.foo = function(a) { }\n *\n * function ChildClass(a, b, c) {\n * // Call parent constructor\n * ParentClass.call(this, a, b);\n * }\n * inherits(ChildClass, ParentClass);\n *\n * var child = new ChildClass('a', 'b', 'see');\n * child.foo(); // This works.\n *\n * @param {!Function} childCtor Child constructor.\n * @param {!Function} parentCtor Parent constructor.\n * @function module:ol.inherits\n * @api\n */\nexport function inherits(childCtor, parentCtor) {\n childCtor.prototype = Object.create(parentCtor.prototype);\n childCtor.prototype.constructor = childCtor;\n}\n\n/**\n * Counter for getUid.\n * @type {number}\n * @private\n */\nlet uidCounter_ = 0;\n\n/**\n * Gets a unique ID for an object. This mutates the object so that further calls\n * with the same object as a parameter returns the same value. Unique IDs are generated\n * as a strictly increasing sequence. Adapted from goog.getUid.\n *\n * @param {Object} obj The object to get the unique ID for.\n * @return {number} The unique ID for the object.\n */\nexport function getUid(obj) {\n return obj.ol_uid || (obj.ol_uid = ++uidCounter_);\n}\n\n/**\n * OpenLayers version.\n * @type {string}\n */\nexport const VERSION = '5.0.3';\n","/**\n * @module ol/AssertionError\n */\nimport {VERSION, inherits} from './util.js';\n\n/**\n * Error object thrown when an assertion failed. This is an ECMA-262 Error,\n * extended with a `code` property.\n * @see {@link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error}\n * @constructor\n * @extends {Error}\n * @param {number} code Error code.\n */\nconst AssertionError = function(code) {\n\n const path = VERSION.split('-')[0];\n\n /**\n * @type {string}\n */\n this.message = 'Assertion failed. See https://openlayers.org/en/' + path +\n '/doc/errors/#' + code + ' for details.';\n\n /**\n * Error code. The meaning of the code can be found on\n * {@link https://openlayers.org/en/latest/doc/errors/} (replace `latest` with\n * the version found in the OpenLayers script's header comment if a version\n * other than the latest is used).\n * @type {number}\n * @api\n */\n this.code = code;\n\n this.name = 'AssertionError';\n\n};\n\ninherits(AssertionError, Error);\n\nexport default AssertionError;\n","/**\n * @module ol/CollectionEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered when an item is added to the collection.\n * @event module:ol/Collection~CollectionEvent#add\n * @api\n */\n ADD: 'add',\n /**\n * Triggered when an item is removed from the collection.\n * @event module:ol/Collection~CollectionEvent#remove\n * @api\n */\n REMOVE: 'remove'\n};\n","/**\n * @module ol/ObjectEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered when a property is changed.\n * @event module:ol/Object~ObjectEvent#propertychange\n * @api\n */\n PROPERTYCHANGE: 'propertychange'\n};\n","/**\n * @module ol/obj\n */\n\n\n/**\n * Polyfill for Object.assign(). Assigns enumerable and own properties from\n * one or more source objects to a target object.\n *\n * @see https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/assign\n * @param {!Object} target The target object.\n * @param {...Object} var_sources The source object(s).\n * @return {!Object} The modified target object.\n */\nexport const assign = (typeof Object.assign === 'function') ? Object.assign : function(target, var_sources) {\n if (target === undefined || target === null) {\n throw new TypeError('Cannot convert undefined or null to object');\n }\n\n const output = Object(target);\n for (let i = 1, ii = arguments.length; i < ii; ++i) {\n const source = arguments[i];\n if (source !== undefined && source !== null) {\n for (const key in source) {\n if (source.hasOwnProperty(key)) {\n output[key] = source[key];\n }\n }\n }\n }\n return output;\n};\n\n\n/**\n * Removes all properties from an object.\n * @param {Object} object The object to clear.\n */\nexport function clear(object) {\n for (const property in object) {\n delete object[property];\n }\n}\n\n\n/**\n * Get an array of property values from an object.\n * @param {Object<K,V>} object The object from which to get the values.\n * @return {!Array<V>} The property values.\n * @template K,V\n */\nexport function getValues(object) {\n const values = [];\n for (const property in object) {\n values.push(object[property]);\n }\n return values;\n}\n\n\n/**\n * Determine if an object has any properties.\n * @param {Object} object The object to check.\n * @return {boolean} The object is empty.\n */\nexport function isEmpty(object) {\n let property;\n for (property in object) {\n return false;\n }\n return !property;\n}\n","/**\n * @module ol/events\n */\nimport {clear} from './obj.js';\n\n\n/**\n * Key to use with {@link module:ol/Observable~Observable#unByKey}.\n * @typedef {Object} EventsKey\n * @property {Object} [bindTo]\n * @property {module:ol/events~ListenerFunction} [boundListener]\n * @property {boolean} callOnce\n * @property {number} [deleteIndex]\n * @property {module:ol/events~ListenerFunction} listener\n * @property {EventTarget|module:ol/events/EventTarget} target\n * @property {string} type\n * @api\n */\n\n\n/**\n * Listener function. This function is called with an event object as argument.\n * When the function returns `false`, event propagation will stop.\n *\n * @typedef {function(module:ol/events/Event)|function(module:ol/events/Event): boolean} ListenerFunction\n * @api\n */\n\n\n/**\n * @param {module:ol/events~EventsKey} listenerObj Listener object.\n * @return {module:ol/events~ListenerFunction} Bound listener.\n */\nexport function bindListener(listenerObj) {\n const boundListener = function(evt) {\n const listener = listenerObj.listener;\n const bindTo = listenerObj.bindTo || listenerObj.target;\n if (listenerObj.callOnce) {\n unlistenByKey(listenerObj);\n }\n return listener.call(bindTo, evt);\n };\n listenerObj.boundListener = boundListener;\n return boundListener;\n}\n\n\n/**\n * Finds the matching {@link module:ol/events~EventsKey} in the given listener\n * array.\n *\n * @param {!Array<!module:ol/events~EventsKey>} listeners Array of listeners.\n * @param {!Function} listener The listener function.\n * @param {Object=} opt_this The `this` value inside the listener.\n * @param {boolean=} opt_setDeleteIndex Set the deleteIndex on the matching\n * listener, for {@link module:ol/events~unlistenByKey}.\n * @return {module:ol/events~EventsKey|undefined} The matching listener object.\n */\nexport function findListener(listeners, listener, opt_this, opt_setDeleteIndex) {\n let listenerObj;\n for (let i = 0, ii = listeners.length; i < ii; ++i) {\n listenerObj = listeners[i];\n if (listenerObj.listener === listener &&\n listenerObj.bindTo === opt_this) {\n if (opt_setDeleteIndex) {\n listenerObj.deleteIndex = i;\n }\n return listenerObj;\n }\n }\n return undefined;\n}\n\n\n/**\n * @param {module:ol/events/EventTarget~EventTargetLike} target Target.\n * @param {string} type Type.\n * @return {Array.<module:ol/events~EventsKey>|undefined} Listeners.\n */\nexport function getListeners(target, type) {\n const listenerMap = target.ol_lm;\n return listenerMap ? listenerMap[type] : undefined;\n}\n\n\n/**\n * Get the lookup of listeners. If one does not exist on the target, it is\n * created.\n * @param {module:ol/events/EventTarget~EventTargetLike} target Target.\n * @return {!Object.<string, Array.<module:ol/events~EventsKey>>} Map of\n * listeners by event type.\n */\nfunction getListenerMap(target) {\n let listenerMap = target.ol_lm;\n if (!listenerMap) {\n listenerMap = target.ol_lm = {};\n }\n return listenerMap;\n}\n\n\n/**\n * Clean up all listener objects of the given type. All properties on the\n * listener objects will be removed, and if no listeners remain in the listener\n * map, it will be removed from the target.\n * @param {module:ol/events/EventTarget~EventTargetLike} target Target.\n * @param {string} type Type.\n */\nfunction removeListeners(target, type) {\n const listeners = getListeners(target, type);\n if (listeners) {\n for (let i = 0, ii = listeners.length; i < ii; ++i) {\n target.removeEventListener(type, listeners[i].boundListener);\n clear(listeners[i]);\n }\n listeners.length = 0;\n const listenerMap = target.ol_lm;\n if (listenerMap) {\n delete listenerMap[type];\n if (Object.keys(listenerMap).length === 0) {\n delete target.ol_lm;\n }\n }\n }\n}\n\n\n/**\n * Registers an event listener on an event target. Inspired by\n * {@link https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html}\n *\n * This function efficiently binds a `listener` to a `this` object, and returns\n * a key for use with {@link module:ol/events~unlistenByKey}.\n *\n * @param {module:ol/events/EventTarget~EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {module:ol/events~ListenerFunction} listener Listener.\n * @param {Object=} opt_this Object referenced by the `this` keyword in the\n * listener. Default is the `target`.\n * @param {boolean=} opt_once If true, add the listener as one-off listener.\n * @return {module:ol/events~EventsKey} Unique key for the listener.\n */\nexport function listen(target, type, listener, opt_this, opt_once) {\n const listenerMap = getListenerMap(target);\n let listeners = listenerMap[type];\n if (!listeners) {\n listeners = listenerMap[type] = [];\n }\n let listenerObj = findListener(listeners, listener, opt_this, false);\n if (listenerObj) {\n if (!opt_once) {\n // Turn one-off listener into a permanent one.\n listenerObj.callOnce = false;\n }\n } else {\n listenerObj = /** @type {module:ol/events~EventsKey} */ ({\n bindTo: opt_this,\n callOnce: !!opt_once,\n listener: listener,\n target: target,\n type: type\n });\n target.addEventListener(type, bindListener(listenerObj));\n listeners.push(listenerObj);\n }\n\n return listenerObj;\n}\n\n\n/**\n * Registers a one-off event listener on an event target. Inspired by\n * {@link https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html}\n *\n * This function efficiently binds a `listener` as self-unregistering listener\n * to a `this` object, and returns a key for use with\n * {@link module:ol/events~unlistenByKey} in case the listener needs to be\n * unregistered before it is called.\n *\n * When {@link module:ol/events~listen} is called with the same arguments after this\n * function, the self-unregistering listener will be turned into a permanent\n * listener.\n *\n * @param {module:ol/events/EventTarget~EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {module:ol/events~ListenerFunction} listener Listener.\n * @param {Object=} opt_this Object referenced by the `this` keyword in the\n * listener. Default is the `target`.\n * @return {module:ol/events~EventsKey} Key for unlistenByKey.\n */\nexport function listenOnce(target, type, listener, opt_this) {\n return listen(target, type, listener, opt_this, true);\n}\n\n\n/**\n * Unregisters an event listener on an event target. Inspired by\n * {@link https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html}\n *\n * To return a listener, this function needs to be called with the exact same\n * arguments that were used for a previous {@link module:ol/events~listen} call.\n *\n * @param {module:ol/events/EventTarget~EventTargetLike} target Event target.\n * @param {string} type Event type.\n * @param {module:ol/events~ListenerFunction} listener Listener.\n * @param {Object=} opt_this Object referenced by the `this` keyword in the\n * listener. Default is the `target`.\n */\nexport function unlisten(target, type, listener, opt_this) {\n const listeners = getListeners(target, type);\n if (listeners) {\n const listenerObj = findListener(listeners, listener, opt_this, true);\n if (listenerObj) {\n unlistenByKey(listenerObj);\n }\n }\n}\n\n\n/**\n * Unregisters event listeners on an event target. Inspired by\n * {@link https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html}\n *\n * The argument passed to this function is the key returned from\n * {@link module:ol/events~listen} or {@link module:ol/events~listenOnce}.\n *\n * @param {module:ol/events~EventsKey} key The key.\n */\nexport function unlistenByKey(key) {\n if (key && key.target) {\n key.target.removeEventListener(key.type, key.boundListener);\n const listeners = getListeners(key.target, key.type);\n if (listeners) {\n const i = 'deleteIndex' in key ? key.deleteIndex : listeners.indexOf(key);\n if (i !== -1) {\n listeners.splice(i, 1);\n }\n if (listeners.length === 0) {\n removeListeners(key.target, key.type);\n }\n }\n clear(key);\n }\n}\n\n\n/**\n * Unregisters all event listeners on an event target. Inspired by\n * {@link https://google.github.io/closure-library/api/source/closure/goog/events/events.js.src.html}\n *\n * @param {module:ol/events/EventTarget~EventTargetLike} target Target.\n */\nexport function unlistenAll(target) {\n const listenerMap = getListenerMap(target);\n for (const type in listenerMap) {\n removeListeners(target, type);\n }\n}\n","/**\n * @module ol/functions\n */\n\n/**\n * Always returns true.\n * @returns {boolean} true.\n */\nexport function TRUE() {\n return true;\n}\n\n/**\n * Always returns false.\n * @returns {boolean} false.\n */\nexport function FALSE() {\n return false;\n}\n\n/**\n * A reusable function, used e.g. as a default for callbacks.\n *\n * @return {undefined} Nothing.\n */\nexport function UNDEFINED() {}\n","/**\n * @module ol/Disposable\n */\nimport {UNDEFINED} from './functions.js';\n\n/**\n * Objects that need to clean up after themselves.\n * @constructor\n */\nconst Disposable = function() {};\n\n/**\n * The object has already been disposed.\n * @type {boolean}\n * @private\n */\nDisposable.prototype.disposed_ = false;\n\n/**\n * Clean up.\n */\nDisposable.prototype.dispose = function() {\n if (!this.disposed_) {\n this.disposed_ = true;\n this.disposeInternal();\n }\n};\n\n/**\n * Extension point for disposable objects.\n * @protected\n */\nDisposable.prototype.disposeInternal = UNDEFINED;\nexport default Disposable;\n","/**\n * @module ol/events/Event\n */\n/**\n * @classdesc\n * Stripped down implementation of the W3C DOM Level 2 Event interface.\n * @see {@link https://www.w3.org/TR/DOM-Level-2-Events/events.html#Events-interface}\n *\n * This implementation only provides `type` and `target` properties, and\n * `stopPropagation` and `preventDefault` methods. It is meant as base class\n * for higher level events defined in the library, and works with\n * {@link module:ol/events/EventTarget~EventTarget}.\n *\n * @constructor\n * @param {string} type Type.\n */\nconst Event = function(type) {\n\n /**\n * @type {boolean}\n */\n this.propagationStopped;\n\n /**\n * The event type.\n * @type {string}\n * @api\n */\n this.type = type;\n\n /**\n * The event target.\n * @type {Object}\n * @api\n */\n this.target = null;\n\n};\n\n\n/**\n * Stop event propagation.\n * @function\n * @api\n */\nEvent.prototype.preventDefault =\n\n /**\n * Stop event propagation.\n * @function\n * @api\n */\n Event.prototype.stopPropagation = function() {\n this.propagationStopped = true;\n };\n\n\n/**\n * @param {Event|module:ol/events/Event} evt Event\n */\nexport function stopPropagation(evt) {\n evt.stopPropagation();\n}\n\n\n/**\n * @param {Event|module:ol/events/Event} evt Event\n */\nexport function preventDefault(evt) {\n evt.preventDefault();\n}\n\nexport default Event;\n","/**\n * @module ol/events/EventTarget\n */\nimport {inherits} from '../util.js';\nimport Disposable from '../Disposable.js';\nimport {unlistenAll} from '../events.js';\nimport {UNDEFINED} from '../functions.js';\nimport Event from '../events/Event.js';\n\n\n/**\n * @typedef {EventTarget|module:ol/events/EventTarget} EventTargetLike\n */\n\n\n/**\n * @classdesc\n * A simplified implementation of the W3C DOM Level 2 EventTarget interface.\n * @see {@link https://www.w3.org/TR/2000/REC-DOM-Level-2-Events-20001113/events.html#Events-EventTarget}\n *\n * There are two important simplifications compared to the specification:\n *\n * 1. The handling of `useCapture` in `addEventListener` and\n * `removeEventListener`. There is no real capture model.\n * 2. The handling of `stopPropagation` and `preventDefault` on `dispatchEvent`.\n * There is no event target hierarchy. When a listener calls\n * `stopPropagation` or `preventDefault` on an event object, it means that no\n * more listeners after this one will be called. Same as when the listener\n * returns false.\n *\n * @constructor\n * @extends {module:ol/Disposable}\n */\nconst EventTarget = function() {\n\n Disposable.call(this);\n\n /**\n * @private\n * @type {!Object.<string, number>}\n */\n this.pendingRemovals_ = {};\n\n /**\n * @private\n * @type {!Object.<string, number>}\n */\n this.dispatching_ = {};\n\n /**\n * @private\n * @type {!Object.<string, Array.<module:ol/events~ListenerFunction>>}\n */\n this.listeners_ = {};\n\n};\n\ninherits(EventTarget, Disposable);\n\n\n/**\n * @param {string} type Type.\n * @param {module:ol/events~ListenerFunction} listener Listener.\n */\nEventTarget.prototype.addEventListener = function(type, listener) {\n let listeners = this.listeners_[type];\n if (!listeners) {\n listeners = this.listeners_[type] = [];\n }\n if (listeners.indexOf(listener) === -1) {\n listeners.push(listener);\n }\n};\n\n\n/**\n * @param {{type: string,\n * target: (EventTarget|module:ol/events/EventTarget|undefined)}|module:ol/events/Event|\n * string} event Event or event type.\n * @return {boolean|undefined} `false` if anyone called preventDefault on the\n * event object or if any of the listeners returned false.\n */\nEventTarget.prototype.dispatchEvent = function(event) {\n const evt = typeof event === 'string' ? new Event(event) : event;\n const type = evt.type;\n evt.target = this;\n const listeners = this.listeners_[type];\n let propagate;\n if (listeners) {\n if (!(type in this.dispatching_)) {\n this.dispatching_[type] = 0;\n this.pendingRemovals_[type] = 0;\n }\n ++this.dispatching_[type];\n for (let i = 0, ii = listeners.length; i < ii; ++i) {\n if (listeners[i].call(this, evt) === false || evt.propagationStopped) {\n propagate = false;\n break;\n }\n }\n --this.dispatching_[type];\n if (this.dispatching_[type] === 0) {\n let pendingRemovals = this.pendingRemovals_[type];\n delete this.pendingRemovals_[type];\n while (pendingRemovals--) {\n this.removeEventListener(type, UNDEFINED);\n }\n delete this.dispatching_[type];\n }\n return propagate;\n }\n};\n\n\n/**\n * @inheritDoc\n */\nEventTarget.prototype.disposeInternal = function() {\n unlistenAll(this);\n};\n\n\n/**\n * Get the listeners for a specified event type. Listeners are returned in the\n * order that they will be called in.\n *\n * @param {string} type Type.\n * @return {Array.<module:ol/events~ListenerFunction>} Listeners.\n */\nEventTarget.prototype.getListeners = function(type) {\n return this.listeners_[type];\n};\n\n\n/**\n * @param {string=} opt_type Type. If not provided,\n * `true` will be returned if this EventTarget has any listeners.\n * @return {boolean} Has listeners.\n */\nEventTarget.prototype.hasListener = function(opt_type) {\n return opt_type ?\n opt_type in this.listeners_ :\n Object.keys(this.listeners_).length > 0;\n};\n\n\n/**\n * @param {string} type Type.\n * @param {module:ol/events~ListenerFunction} listener Listener.\n */\nEventTarget.prototype.removeEventListener = function(type, listener) {\n const listeners = this.listeners_[type];\n if (listeners) {\n const index = listeners.indexOf(listener);\n if (type in this.pendingRemovals_) {\n // make listener a no-op, and remove later in #dispatchEvent()\n listeners[index] = UNDEFINED;\n ++this.pendingRemovals_[type];\n } else {\n listeners.splice(index, 1);\n if (listeners.length === 0) {\n delete this.listeners_[type];\n }\n }\n }\n};\nexport default EventTarget;\n","/**\n * @module ol/events/EventType\n */\n\n/**\n * @enum {string}\n * @const\n */\nexport default {\n /**\n * Generic change event. Triggered when the revision counter is increased.\n * @event module:ol/events/Event~Event#change\n * @api\n */\n CHANGE: 'change',\n\n CLEAR: 'clear',\n CONTEXTMENU: 'contextmenu',\n CLICK: 'click',\n DBLCLICK: 'dblclick',\n DRAGENTER: 'dragenter',\n DRAGOVER: 'dragover',\n DROP: 'drop',\n ERROR: 'error',\n KEYDOWN: 'keydown',\n KEYPRESS: 'keypress',\n LOAD: 'load',\n MOUSEDOWN: 'mousedown',\n MOUSEMOVE: 'mousemove',\n MOUSEOUT: 'mouseout',\n MOUSEUP: 'mouseup',\n MOUSEWHEEL: 'mousewheel',\n MSPOINTERDOWN: 'MSPointerDown',\n RESIZE: 'resize',\n TOUCHSTART: 'touchstart',\n TOUCHMOVE: 'touchmove',\n TOUCHEND: 'touchend',\n WHEEL: 'wheel'\n};\n","/**\n * @module ol/Observable\n */\nimport {inherits} from './util.js';\nimport {listen, unlistenByKey, unlisten, listenOnce} from './events.js';\nimport EventTarget from './events/EventTarget.js';\nimport EventType from './events/EventType.js';\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * An event target providing convenient methods for listener registration\n * and unregistration. A generic `change` event is always available through\n * {@link module:ol/Observable~Observable#changed}.\n *\n * @constructor\n * @extends {module:ol/events/EventTarget}\n * @fires module:ol/events/Event~Event\n * @struct\n * @api\n */\nconst Observable = function() {\n\n EventTarget.call(this);\n\n /**\n * @private\n * @type {number}\n */\n this.revision_ = 0;\n\n};\n\ninherits(Observable, EventTarget);\n\n\n/**\n * Removes an event listener using the key returned by `on()` or `once()`.\n * @param {module:ol/events~EventsKey|Array.<module:ol/events~EventsKey>} key The key returned by `on()`\n * or `once()` (or an array of keys).\n * @api\n */\nexport function unByKey(key) {\n if (Array.isArray(key)) {\n for (let i = 0, ii = key.length; i < ii; ++i) {\n unlistenByKey(key[i]);\n }\n } else {\n unlistenByKey(/** @type {module:ol/events~EventsKey} */ (key));\n }\n}\n\n\n/**\n * Increases the revision counter and dispatches a 'change' event.\n * @api\n */\nObservable.prototype.changed = function() {\n ++this.revision_;\n this.dispatchEvent(EventType.CHANGE);\n};\n\n\n/**\n * Dispatches an event and calls all listeners listening for events\n * of this type. The event parameter can either be a string or an\n * Object with a `type` property.\n *\n * @param {{type: string,\n * target: (EventTarget|module:ol/events/EventTarget|undefined)}|\n * module:ol/events/Event|string} event Event object.\n * @function\n * @api\n */\nObservable.prototype.dispatchEvent;\n\n\n/**\n * Get the version number for this object. Each time the object is modified,\n * its version number will be incremented.\n * @return {number} Revision.\n * @api\n */\nObservable.prototype.getRevision = function() {\n return this.revision_;\n};\n\n\n/**\n * Listen for a certain type of event.\n * @param {string|Array.<string>} type The event type or array of event types.\n * @param {function(?): ?} listener The listener function.\n * @return {module:ol/events~EventsKey|Array.<module:ol/events~EventsKey>} Unique key for the listener. If\n * called with an array of event types as the first argument, the return\n * will be an array of keys.\n * @api\n */\nObservable.prototype.on = function(type, listener) {\n if (Array.isArray(type)) {\n const len = type.length;\n const keys = new Array(len);\n for (let i = 0; i < len; ++i) {\n keys[i] = listen(this, type[i], listener);\n }\n return keys;\n } else {\n return listen(this, /** @type {string} */ (type), listener);\n }\n};\n\n\n/**\n * Listen once for a certain type of event.\n * @param {string|Array.<string>} type The event type or array of event types.\n * @param {function(?): ?} listener The listener function.\n * @return {module:ol/events~EventsKey|Array.<module:ol/events~EventsKey>} Unique key for the listener. If\n * called with an array of event types as the first argument, the return\n * will be an array of keys.\n * @api\n */\nObservable.prototype.once = function(type, listener) {\n if (Array.isArray(type)) {\n const len = type.length;\n const keys = new Array(len);\n for (let i = 0; i < len; ++i) {\n keys[i] = listenOnce(this, type[i], listener);\n }\n return keys;\n } else {\n return listenOnce(this, /** @type {string} */ (type), listener);\n }\n};\n\n\n/**\n * Unlisten for a certain type of event.\n * @param {string|Array.<string>} type The event type or array of event types.\n * @param {function(?): ?} listener The listener function.\n * @api\n */\nObservable.prototype.un = function(type, listener) {\n if (Array.isArray(type)) {\n for (let i = 0, ii = type.length; i < ii; ++i) {\n unlisten(this, type[i], listener);\n }\n return;\n } else {\n unlisten(this, /** @type {string} */ (type), listener);\n }\n};\nexport default Observable;\n","/**\n * @module ol/Object\n */\nimport {getUid, inherits} from './util.js';\nimport ObjectEventType from './ObjectEventType.js';\nimport Observable from './Observable.js';\nimport Event from './events/Event.js';\nimport {assign} from './obj.js';\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Object~BaseObject} instances are instances of\n * this type.\n *\n * @param {string} type The event type.\n * @param {string} key The property name.\n * @param {*} oldValue The old value for `key`.\n * @extends {module:ol/events/Event}\n * @constructor\n */\nconst ObjectEvent = function(type, key, oldValue) {\n Event.call(this, type);\n\n /**\n * The name of the property whose value is changing.\n * @type {string}\n * @api\n */\n this.key = key;\n\n /**\n * The old value. To get the new value use `e.target.get(e.key)` where\n * `e` is the event object.\n * @type {*}\n * @api\n */\n this.oldValue = oldValue;\n\n};\ninherits(ObjectEvent, Event);\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Most non-trivial classes inherit from this.\n *\n * This extends {@link module:ol/Observable} with observable\n * properties, where each property is observable as well as the object as a\n * whole.\n *\n * Classes that inherit from this have pre-defined properties, to which you can\n * add your owns. The pre-defined properties are listed in this documentation as\n * 'Observable Properties', and have their own accessors; for example,\n * {@link module:ol/Map~Map} has a `target` property, accessed with\n * `getTarget()` and changed with `setTarget()`. Not all properties are however\n * settable. There are also general-purpose accessors `get()` and `set()`. For\n * example, `get('target')` is equivalent to `getTarget()`.\n *\n * The `set` accessors trigger a change event, and you can monitor this by\n * registering a listener. For example, {@link module:ol/View~View} has a\n * `center` property, so `view.on('change:center', function(evt) {...});` would\n * call the function whenever the value of the center property changes. Within\n * the function, `evt.target` would be the view, so `evt.target.getCenter()`\n * would return the new center.\n *\n * You can add your own observable properties with\n * `object.set('prop', 'value')`, and retrieve that with `object.get('prop')`.\n * You can listen for changes on that property value with\n * `object.on('change:prop', listener)`. You can get a list of all\n * properties with {@link module:ol/Object~BaseObject#getProperties}.\n *\n * Note that the observable properties are separate from standard JS properties.\n * You can, for example, give your map object a title with\n * `map.title='New title'` and with `map.set('title', 'Another title')`. The\n * first will be a `hasOwnProperty`; the second will appear in\n * `getProperties()`. Only the second is observable.\n *\n * Properties can be deleted by using the unset method. E.g.\n * object.unset('foo').\n *\n * @constructor\n * @extends {module:ol/Observable}\n * @param {Object.<string, *>=} opt_values An object with key-value pairs.\n * @fires module:ol/Object~ObjectEvent\n * @api\n */\nconst BaseObject = function(opt_values) {\n Observable.call(this);\n\n // Call {@link module:ol~getUid} to ensure that the order of objects' ids is\n // the same as the order in which they were created. This also helps to\n // ensure that object properties are always added in the same order, which\n // helps many JavaScript engines generate faster code.\n getUid(this);\n\n /**\n * @private\n * @type {!Object.<string, *>}\n */\n this.values_ = {};\n\n if (opt_values !== undefined) {\n this.setProperties(opt_values);\n }\n};\n\ninherits(BaseObject, Observable);\n\n\n/**\n * @type {Object.<string, string>}\n */\nconst changeEventTypeCache = {};\n\n\n/**\n * @param {string} key Key name.\n * @return {string} Change name.\n */\nexport function getChangeEventType(key) {\n return changeEventTypeCache.hasOwnProperty(key) ?\n changeEventTypeCache[key] :\n (changeEventTypeCache[key] = 'change:' + key);\n}\n\n\n/**\n * Gets a value.\n * @param {string} key Key name.\n * @return {*} Value.\n * @api\n */\nBaseObject.prototype.get = function(key) {\n let value;\n if (this.values_.hasOwnProperty(key)) {\n value = this.values_[key];\n }\n return value;\n};\n\n\n/**\n * Get a list of object property names.\n * @return {Array.<string>} List of property names.\n * @api\n */\nBaseObject.prototype.getKeys = function() {\n return Object.keys(this.values_);\n};\n\n\n/**\n * Get an object of all property names and values.\n * @return {Object.<string, *>} Object.\n * @api\n */\nBaseObject.prototype.getProperties = function() {\n return assign({}, this.values_);\n};\n\n\n/**\n * @param {string} key Key name.\n * @param {*} oldValue Old value.\n */\nBaseObject.prototype.notify = function(key, oldValue) {\n let eventType;\n eventType = getChangeEventType(key);\n this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n eventType = ObjectEventType.PROPERTYCHANGE;\n this.dispatchEvent(new ObjectEvent(eventType, key, oldValue));\n};\n\n\n/**\n * Sets a value.\n * @param {string} key Key name.\n * @param {*} value Value.\n * @param {boolean=} opt_silent Update without triggering an event.\n * @api\n */\nBaseObject.prototype.set = function(key, value, opt_silent) {\n if (opt_silent) {\n this.values_[key] = value;\n } else {\n const oldValue = this.values_[key];\n this.values_[key] = value;\n if (oldValue !== value) {\n this.notify(key, oldValue);\n }\n }\n};\n\n\n/**\n * Sets a collection of key-value pairs. Note that this changes any existing\n * properties and adds new ones (it does not remove any existing properties).\n * @param {Object.<string, *>} values Values.\n * @param {boolean=} opt_silent Update without triggering an event.\n * @api\n */\nBaseObject.prototype.setProperties = function(values, opt_silent) {\n for (const key in values) {\n this.set(key, values[key], opt_silent);\n }\n};\n\n\n/**\n * Unsets a property.\n * @param {string} key Key name.\n * @param {boolean=} opt_silent Unset without triggering an event.\n * @api\n */\nBaseObject.prototype.unset = function(key, opt_silent) {\n if (key in this.values_) {\n const oldValue = this.values_[key];\n delete this.values_[key];\n if (!opt_silent) {\n this.notify(key, oldValue);\n }\n }\n};\n\n\nexport default BaseObject;\n","/**\n * @module ol/Collection\n */\nimport {inherits} from './util.js';\nimport AssertionError from './AssertionError.js';\nimport CollectionEventType from './CollectionEventType.js';\nimport BaseObject from './Object.js';\nimport Event from './events/Event.js';\n\n\n/**\n * @enum {string}\n * @private\n */\nconst Property = {\n LENGTH: 'length'\n};\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/Collection~Collection} instances are instances of this\n * type.\n *\n * @constructor\n * @extends {module:ol/events/Event}\n * @param {module:ol/CollectionEventType} type Type.\n * @param {*=} opt_element Element.\n */\nexport const CollectionEvent = function(type, opt_element) {\n\n Event.call(this, type);\n\n /**\n * The element that is added to or removed from the collection.\n * @type {*}\n * @api\n */\n this.element = opt_element;\n\n};\n\ninherits(CollectionEvent, Event);\n\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [unique=false] Disallow the same item from being added to\n * the collection twice.\n */\n\n/**\n * @classdesc\n * An expanded version of standard JS Array, adding convenience methods for\n * manipulation. Add and remove changes to the Collection trigger a Collection\n * event. Note that this does not cover changes to the objects _within_ the\n * Collection; they trigger events on the appropriate object, not on the\n * Collection as a whole.\n *\n * @constructor\n * @extends {module:ol/Object}\n * @fires module:ol/Collection~CollectionEvent\n * @param {Array.<T>=} opt_array Array.\n * @param {module:ol/Collection~Options=} opt_options Collection options.\n * @template T\n * @api\n */\nconst Collection = function(opt_array, opt_options) {\n\n BaseObject.call(this);\n\n const options = opt_options || {};\n\n /**\n * @private\n * @type {boolean}\n */\n this.unique_ = !!options.unique;\n\n /**\n * @private\n * @type {!Array.<T>}\n */\n this.array_ = opt_array ? opt_array : [];\n\n if (this.unique_) {\n for (let i = 0, ii = this.array_.length; i < ii; ++i) {\n this.assertUnique_(this.array_[i], i);\n }\n }\n\n this.updateLength_();\n\n};\n\ninherits(Collection, BaseObject);\n\n\n/**\n * Remove all elements from the collection.\n * @api\n */\nCollection.prototype.clear = function() {\n while (this.getLength() > 0) {\n this.pop();\n }\n};\n\n\n/**\n * Add elements to the collection. This pushes each item in the provided array\n * to the end of the collection.\n * @param {!Array.<T>} arr Array.\n * @return {module:ol/Collection.<T>} This collection.\n * @api\n */\nCollection.prototype.extend = function(arr) {\n for (let i = 0, ii = arr.length; i < ii; ++i) {\n this.push(arr[i]);\n }\n return this;\n};\n\n\n/**\n * Iterate over each element, calling the provided callback.\n * @param {function(T, number, Array.<T>): *} f The function to call\n * for every element. This function takes 3 arguments (the element, the\n * index and the array). The return value is ignored.\n * @api\n */\nCollection.prototype.forEach = function(f) {\n const array = this.array_;\n for (let i = 0, ii = array.length; i < ii; ++i) {\n f(array[i], i, array);\n }\n};\n\n\n/**\n * Get a reference to the underlying Array object. Warning: if the array\n * is mutated, no events will be dispatched by the collection, and the\n * collection's \"length\" property won't be in sync with the actual length\n * of the array.\n * @return {!Array.<T>} Array.\n * @api\n */\nCollection.prototype.getArray = function() {\n return this.array_;\n};\n\n\n/**\n * Get the element at the provided index.\n * @param {number} index Index.\n * @return {T} Element.\n * @api\n */\nCollection.prototype.item = function(index) {\n return this.array_[index];\n};\n\n\n/**\n * Get the length of this collection.\n * @return {number} The length of the array.\n * @observable\n * @api\n */\nCollection.prototype.getLength = function() {\n return /** @type {number} */ (this.get(Property.LENGTH));\n};\n\n\n/**\n * Insert an element at the provided index.\n * @param {number} index Index.\n * @param {T} elem Element.\n * @api\n */\nCollection.prototype.insertAt = function(index, elem) {\n if (this.unique_) {\n this.assertUnique_(elem);\n }\n this.array_.splice(index, 0, elem);\n this.updateLength_();\n this.dispatchEvent(\n new CollectionEvent(CollectionEventType.ADD, elem));\n};\n\n\n/**\n * Remove the last element of the collection and return it.\n * Return `undefined` if the collection is empty.\n * @return {T|undefined} Element.\n * @api\n */\nCollection.prototype.pop = function() {\n return this.removeAt(this.getLength() - 1);\n};\n\n\n/**\n * Insert the provided element at the end of the collection.\n * @param {T} elem Element.\n * @return {number} New length of the collection.\n * @api\n */\nCollection.prototype.push = function(elem) {\n if (this.unique_) {\n this.assertUnique_(elem);\n }\n const n = this.getLength();\n this.insertAt(n, elem);\n return this.getLength();\n};\n\n\n/**\n * Remove the first occurrence of an element from the collection.\n * @param {T} elem Element.\n * @return {T|undefined} The removed element or undefined if none found.\n * @api\n */\nCollection.prototype.remove = function(elem) {\n const arr = this.array_;\n for (let i = 0, ii = arr.length; i < ii; ++i) {\n if (arr[i] === elem) {\n return this.removeAt(i);\n }\n }\n return undefined;\n};\n\n\n/**\n * Remove the element at the provided index and return it.\n * Return `undefined` if the collection does not contain this index.\n * @param {number} index Index.\n * @return {T|undefined} Value.\n * @api\n */\nCollection.prototype.removeAt = function(index) {\n const prev = this.array_[index];\n this.array_.splice(index, 1);\n this.updateLength_();\n this.dispatchEvent(new CollectionEvent(CollectionEventType.REMOVE, prev));\n return prev;\n};\n\n\n/**\n * Set the element at the provided index.\n * @param {number} index Index.\n * @param {T} elem Element.\n * @api\n */\nCollection.prototype.setAt = function(index, elem) {\n const n = this.getLength();\n if (index < n) {\n if (this.unique_) {\n this.assertUnique_(elem, index);\n }\n const prev = this.array_[index];\n this.array_[index] = elem;\n this.dispatchEvent(\n new CollectionEvent(CollectionEventType.REMOVE, prev));\n this.dispatchEvent(\n new CollectionEvent(CollectionEventType.ADD, elem));\n } else {\n for (let j = n; j < index; ++j) {\n this.insertAt(j, undefined);\n }\n this.insertAt(index, elem);\n }\n};\n\n\n/**\n * @private\n */\nCollection.prototype.updateLength_ = function() {\n this.set(Property.LENGTH, this.array_.length);\n};\n\n\n/**\n * @private\n * @param {T} elem Element.\n * @param {number=} opt_except Optional index to ignore.\n */\nCollection.prototype.assertUnique_ = function(elem, opt_except) {\n for (let i = 0, ii = this.array_.length; i < ii; ++i) {\n if (this.array_[i] === elem && i !== opt_except) {\n throw new AssertionError(58);\n }\n }\n};\n\nexport default Collection;\n","/**\n * @module ol/asserts\n */\nimport AssertionError from './AssertionError.js';\n\n/**\n * @param {*} assertion Assertion we expected to be truthy.\n * @param {number} errorCode Error code.\n */\nexport function assert(assertion, errorCode) {\n if (!assertion) {\n throw new AssertionError(errorCode);\n }\n}\n","/**\n * @module ol/extent/Corner\n */\n\n/**\n * Extent corner.\n * @enum {string}\n */\nexport default {\n BOTTOM_LEFT: 'bottom-left',\n BOTTOM_RIGHT: 'bottom-right',\n TOP_LEFT: 'top-left',\n TOP_RIGHT: 'top-right'\n};\n","/**\n * @module ol/extent/Relationship\n */\n\n/**\n * Relationship to an extent.\n * @enum {number}\n */\nexport default {\n UNKNOWN: 0,\n INTERSECTING: 1,\n ABOVE: 2,\n RIGHT: 4,\n BELOW: 8,\n LEFT: 16\n};\n","/**\n * @module ol/extent\n */\nimport {assert} from './asserts.js';\nimport Corner from './extent/Corner.js';\nimport Relationship from './extent/Relationship.js';\n\n\n/**\n * An array of numbers representing an extent: `[minx, miny, maxx, maxy]`.\n * @typedef {Array.<number>} Extent\n * @api\n */\n\n/**\n * Build an extent that includes all given coordinates.\n *\n * @param {Array.<module:ol/coordinate~Coordinate>} coordinates Coordinates.\n * @return {module:ol/extent~Extent} Bounding extent.\n * @api\n */\nexport function boundingExtent(coordinates) {\n const extent = createEmpty();\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n extendCoordinate(extent, coordinates[i]);\n }\n return extent;\n}\n\n\n/**\n * @param {Array.<number>} xs Xs.\n * @param {Array.<number>} ys Ys.\n * @param {module:ol/extent~Extent=} opt_extent Destination extent.\n * @private\n * @return {module:ol/extent~Extent} Extent.\n */\nfunction _boundingExtentXYs(xs, ys, opt_extent) {\n const minX = Math.min.apply(null, xs);\n const minY = Math.min.apply(null, ys);\n const maxX = Math.max.apply(null, xs);\n const maxY = Math.max.apply(null, ys);\n return createOrUpdate(minX, minY, maxX, maxY, opt_extent);\n}\n\n\n/**\n * Return extent increased by the provided value.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} value The amount by which the extent should be buffered.\n * @param {module:ol/extent~Extent=} opt_extent Extent.\n * @return {module:ol/extent~Extent} Extent.\n * @api\n */\nexport function buffer(extent, value, opt_extent) {\n if (opt_extent) {\n opt_extent[0] = extent[0] - value;\n opt_extent[1] = extent[1] - value;\n opt_extent[2] = extent[2] + value;\n opt_extent[3] = extent[3] + value;\n return opt_extent;\n } else {\n return [\n extent[0] - value,\n extent[1] - value,\n extent[2] + value,\n extent[3] + value\n ];\n }\n}\n\n\n/**\n * Creates a clone of an extent.\n *\n * @param {module:ol/extent~Extent} extent Extent to clone.\n * @param {module:ol/extent~Extent=} opt_extent Extent.\n * @return {module:ol/extent~Extent} The clone.\n */\nexport function clone(extent, opt_extent) {\n if (opt_extent) {\n opt_extent[0] = extent[0];\n opt_extent[1] = extent[1];\n opt_extent[2] = extent[2];\n opt_extent[3] = extent[3];\n return opt_extent;\n } else {\n return extent.slice();\n }\n}\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {number} Closest squared distance.\n */\nexport function closestSquaredDistanceXY(extent, x, y) {\n let dx, dy;\n if (x < extent[0]) {\n dx = extent[0] - x;\n } else if (extent[2] < x) {\n dx = x - extent[2];\n } else {\n dx = 0;\n }\n if (y < extent[1]) {\n dy = extent[1] - y;\n } else if (extent[3] < y) {\n dy = y - extent[3];\n } else {\n dy = 0;\n }\n return dx * dx + dy * dy;\n}\n\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @return {boolean} The coordinate is contained in the extent.\n * @api\n */\nexport function containsCoordinate(extent, coordinate) {\n return containsXY(extent, coordinate[0], coordinate[1]);\n}\n\n\n/**\n * Check if one extent contains another.\n *\n * An extent is deemed contained if it lies completely within the other extent,\n * including if they share one or more edges.\n *\n * @param {module:ol/extent~Extent} extent1 Extent 1.\n * @param {module:ol/extent~Extent} extent2 Extent 2.\n * @return {boolean} The second extent is contained by or on the edge of the\n * first.\n * @api\n */\nexport function containsExtent(extent1, extent2) {\n return extent1[0] <= extent2[0] && extent2[2] <= extent1[2] &&\n extent1[1] <= extent2[1] && extent2[3] <= extent1[3];\n}\n\n\n/**\n * Check if the passed coordinate is contained or on the edge of the extent.\n *\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} x X coordinate.\n * @param {number} y Y coordinate.\n * @return {boolean} The x, y values are contained in the extent.\n * @api\n */\nexport function containsXY(extent, x, y) {\n return extent[0] <= x && x <= extent[2] && extent[1] <= y && y <= extent[3];\n}\n\n\n/**\n * Get the relationship between a coordinate and extent.\n * @param {module:ol/extent~Extent} extent The extent.\n * @param {module:ol/coordinate~Coordinate} coordinate The coordinate.\n * @return {module:ol/extent/Relationship} The relationship (bitwise compare with\n * module:ol/extent/Relationship~Relationship).\n */\nexport function coordinateRelationship(extent, coordinate) {\n const minX = extent[0];\n const minY = extent[1];\n const maxX = extent[2];\n const maxY = extent[3];\n const x = coordinate[0];\n const y = coordinate[1];\n let relationship = Relationship.UNKNOWN;\n if (x < minX) {\n relationship = relationship | Relationship.LEFT;\n } else if (x > maxX) {\n relationship = relationship | Relationship.RIGHT;\n }\n if (y < minY) {\n relationship = relationship | Relationship.BELOW;\n } else if (y > maxY) {\n relationship = relationship | Relationship.ABOVE;\n }\n if (relationship === Relationship.UNKNOWN) {\n relationship = Relationship.INTERSECTING;\n }\n return relationship;\n}\n\n\n/**\n * Create an empty extent.\n * @return {module:ol/extent~Extent} Empty extent.\n * @api\n */\nexport function createEmpty() {\n return [Infinity, Infinity, -Infinity, -Infinity];\n}\n\n\n/**\n * Create a new extent or update the provided extent.\n * @param {number} minX Minimum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxX Maximum X.\n * @param {number} maxY Maximum Y.\n * @param {module:ol/extent~Extent=} opt_extent Destination extent.\n * @return {module:ol/extent~Extent} Extent.\n */\nexport function createOrUpdate(minX, minY, maxX, maxY, opt_extent) {\n if (opt_extent) {\n opt_extent[0] = minX;\n opt_extent[1] = minY;\n opt_extent[2] = maxX;\n opt_extent[3] = maxY;\n return opt_extent;\n } else {\n return [minX, minY, maxX, maxY];\n }\n}\n\n\n/**\n * Create a new empty extent or make the provided one empty.\n * @param {module:ol/extent~Extent=} opt_extent Extent.\n * @return {module:ol/extent~Extent} Extent.\n */\nexport function createOrUpdateEmpty(opt_extent) {\n return createOrUpdate(\n Infinity, Infinity, -Infinity, -Infinity, opt_extent);\n}\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {module:ol/extent~Extent=} opt_extent Extent.\n * @return {module:ol/extent~Extent} Extent.\n */\nexport function createOrUpdateFromCoordinate(coordinate, opt_extent) {\n const x = coordinate[0];\n const y = coordinate[1];\n return createOrUpdate(x, y, x, y, opt_extent);\n}\n\n\n/**\n * @param {Array.<module:ol/coordinate~Coordinate>} coordinates Coordinates.\n * @param {module:ol/extent~Extent=} opt_extent Extent.\n * @return {module:ol/extent~Extent} Extent.\n */\nexport function createOrUpdateFromCoordinates(coordinates, opt_extent) {\n const extent = createOrUpdateEmpty(opt_extent);\n return extendCoordinates(extent, coordinates);\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {module:ol/extent~Extent=} opt_extent Extent.\n * @return {module:ol/extent~Extent} Extent.\n */\nexport function createOrUpdateFromFlatCoordinates(flatCoordinates, offset, end, stride, opt_extent) {\n const extent = createOrUpdateEmpty(opt_extent);\n return extendFlatCoordinates(extent, flatCoordinates, offset, end, stride);\n}\n\n/**\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} rings Rings.\n * @param {module:ol/extent~Extent=} opt_extent Extent.\n * @return {module:ol/extent~Extent} Extent.\n */\nexport function createOrUpdateFromRings(rings, opt_extent) {\n const extent = createOrUpdateEmpty(opt_extent);\n return extendRings(extent, rings);\n}\n\n\n/**\n * Determine if two extents are equivalent.\n * @param {module:ol/extent~Extent} extent1 Extent 1.\n * @param {module:ol/extent~Extent} extent2 Extent 2.\n * @return {boolean} The two extents are equivalent.\n * @api\n */\nexport function equals(extent1, extent2) {\n return extent1[0] == extent2[0] && extent1[2] == extent2[2] &&\n extent1[1] == extent2[1] && extent1[3] == extent2[3];\n}\n\n\n/**\n * Modify an extent to include another extent.\n * @param {module:ol/extent~Extent} extent1 The extent to be modified.\n * @param {module:ol/extent~Extent} extent2 The extent that will be included in the first.\n * @return {module:ol/extent~Extent} A reference to the first (extended) extent.\n * @api\n */\nexport function extend(extent1, extent2) {\n if (extent2[0] < extent1[0]) {\n extent1[0] = extent2[0];\n }\n if (extent2[2] > extent1[2]) {\n extent1[2] = extent2[2];\n }\n if (extent2[1] < extent1[1]) {\n extent1[1] = extent2[1];\n }\n if (extent2[3] > extent1[3]) {\n extent1[3] = extent2[3];\n }\n return extent1;\n}\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n */\nexport function extendCoordinate(extent, coordinate) {\n if (coordinate[0] < extent[0]) {\n extent[0] = coordinate[0];\n }\n if (coordinate[0] > extent[2]) {\n extent[2] = coordinate[0];\n }\n if (coordinate[1] < extent[1]) {\n extent[1] = coordinate[1];\n }\n if (coordinate[1] > extent[3]) {\n extent[3] = coordinate[1];\n }\n}\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {Array.<module:ol/coordinate~Coordinate>} coordinates Coordinates.\n * @return {module:ol/extent~Extent} Extent.\n */\nexport function extendCoordinates(extent, coordinates) {\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n extendCoordinate(extent, coordinates[i]);\n }\n return extent;\n}\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {module:ol/extent~Extent} Extent.\n */\nexport function extendFlatCoordinates(extent, flatCoordinates, offset, end, stride) {\n for (; offset < end; offset += stride) {\n extendXY(extent, flatCoordinates[offset], flatCoordinates[offset + 1]);\n }\n return extent;\n}\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} rings Rings.\n * @return {module:ol/extent~Extent} Extent.\n */\nexport function extendRings(extent, rings) {\n for (let i = 0, ii = rings.length; i < ii; ++i) {\n extendCoordinates(extent, rings[i]);\n }\n return extent;\n}\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} x X.\n * @param {number} y Y.\n */\nexport function extendXY(extent, x, y) {\n extent[0] = Math.min(extent[0], x);\n extent[1] = Math.min(extent[1], y);\n extent[2] = Math.max(extent[2], x);\n extent[3] = Math.max(extent[3], y);\n}\n\n\n/**\n * This function calls `callback` for each corner of the extent. If the\n * callback returns a truthy value the function returns that value\n * immediately. Otherwise the function returns `false`.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {function(this:T, module:ol/coordinate~Coordinate): S} callback Callback.\n * @param {T=} opt_this Value to use as `this` when executing `callback`.\n * @return {S|boolean} Value.\n * @template S, T\n */\nexport function forEachCorner(extent, callback, opt_this) {\n let val;\n val = callback.call(opt_this, getBottomLeft(extent));\n if (val) {\n return val;\n }\n val = callback.call(opt_this, getBottomRight(extent));\n if (val) {\n return val;\n }\n val = callback.call(opt_this, getTopRight(extent));\n if (val) {\n return val;\n }\n val = callback.call(opt_this, getTopLeft(extent));\n if (val) {\n return val;\n }\n return false;\n}\n\n\n/**\n * Get the size of an extent.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {number} Area.\n * @api\n */\nexport function getArea(extent) {\n let area = 0;\n if (!isEmpty(extent)) {\n area = getWidth(extent) * getHeight(extent);\n }\n return area;\n}\n\n\n/**\n * Get the bottom left coordinate of an extent.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {module:ol/coordinate~Coordinate} Bottom left coordinate.\n * @api\n */\nexport function getBottomLeft(extent) {\n return [extent[0], extent[1]];\n}\n\n\n/**\n * Get the bottom right coordinate of an extent.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {module:ol/coordinate~Coordinate} Bottom right coordinate.\n * @api\n */\nexport function getBottomRight(extent) {\n return [extent[2], extent[1]];\n}\n\n\n/**\n * Get the center coordinate of an extent.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {module:ol/coordinate~Coordinate} Center.\n * @api\n */\nexport function getCenter(extent) {\n return [(extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2];\n}\n\n\n/**\n * Get a corner coordinate of an extent.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {module:ol/extent/Corner} corner Corner.\n * @return {module:ol/coordinate~Coordinate} Corner coordinate.\n */\nexport function getCorner(extent, corner) {\n let coordinate;\n if (corner === Corner.BOTTOM_LEFT) {\n coordinate = getBottomLeft(extent);\n } else if (corner === Corner.BOTTOM_RIGHT) {\n coordinate = getBottomRight(extent);\n } else if (corner === Corner.TOP_LEFT) {\n coordinate = getTopLeft(extent);\n } else if (corner === Corner.TOP_RIGHT) {\n coordinate = getTopRight(extent);\n } else {\n assert(false, 13); // Invalid corner\n }\n return (\n /** @type {!module:ol/coordinate~Coordinate} */ (coordinate)\n );\n}\n\n\n/**\n * @param {module:ol/extent~Extent} extent1 Extent 1.\n * @param {module:ol/extent~Extent} extent2 Extent 2.\n * @return {number} Enlarged area.\n */\nexport function getEnlargedArea(extent1, extent2) {\n const minX = Math.min(extent1[0], extent2[0]);\n const minY = Math.min(extent1[1], extent2[1]);\n const maxX = Math.max(extent1[2], extent2[2]);\n const maxY = Math.max(extent1[3], extent2[3]);\n return (maxX - minX) * (maxY - minY);\n}\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {module:ol/size~Size} size Size.\n * @param {module:ol/extent~Extent=} opt_extent Destination extent.\n * @return {module:ol/extent~Extent} Extent.\n */\nexport function getForViewAndSize(center, resolution, rotation, size, opt_extent) {\n const dx = resolution * size[0] / 2;\n const dy = resolution * size[1] / 2;\n const cosRotation = Math.cos(rotation);\n const sinRotation = Math.sin(rotation);\n const xCos = dx * cosRotation;\n const xSin = dx * sinRotation;\n const yCos = dy * cosRotation;\n const ySin = dy * sinRotation;\n const x = center[0];\n const y = center[1];\n const x0 = x - xCos + ySin;\n const x1 = x - xCos - ySin;\n const x2 = x + xCos - ySin;\n const x3 = x + xCos + ySin;\n const y0 = y - xSin - yCos;\n const y1 = y - xSin + yCos;\n const y2 = y + xSin + yCos;\n const y3 = y + xSin - yCos;\n return createOrUpdate(\n Math.min(x0, x1, x2, x3), Math.min(y0, y1, y2, y3),\n Math.max(x0, x1, x2, x3), Math.max(y0, y1, y2, y3),\n opt_extent);\n}\n\n\n/**\n * Get the height of an extent.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {number} Height.\n * @api\n */\nexport function getHeight(extent) {\n return extent[3] - extent[1];\n}\n\n\n/**\n * @param {module:ol/extent~Extent} extent1 Extent 1.\n * @param {module:ol/extent~Extent} extent2 Extent 2.\n * @return {number} Intersection area.\n */\nexport function getIntersectionArea(extent1, extent2) {\n const intersection = getIntersection(extent1, extent2);\n return getArea(intersection);\n}\n\n\n/**\n * Get the intersection of two extents.\n * @param {module:ol/extent~Extent} extent1 Extent 1.\n * @param {module:ol/extent~Extent} extent2 Extent 2.\n * @param {module:ol/extent~Extent=} opt_extent Optional extent to populate with intersection.\n * @return {module:ol/extent~Extent} Intersecting extent.\n * @api\n */\nexport function getIntersection(extent1, extent2, opt_extent) {\n const intersection = opt_extent ? opt_extent : createEmpty();\n if (intersects(extent1, extent2)) {\n if (extent1[0] > extent2[0]) {\n intersection[0] = extent1[0];\n } else {\n intersection[0] = extent2[0];\n }\n if (extent1[1] > extent2[1]) {\n intersection[1] = extent1[1];\n } else {\n intersection[1] = extent2[1];\n }\n if (extent1[2] < extent2[2]) {\n intersection[2] = extent1[2];\n } else {\n intersection[2] = extent2[2];\n }\n if (extent1[3] < extent2[3]) {\n intersection[3] = extent1[3];\n } else {\n intersection[3] = extent2[3];\n }\n } else {\n createOrUpdateEmpty(intersection);\n }\n return intersection;\n}\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {number} Margin.\n */\nexport function getMargin(extent) {\n return getWidth(extent) + getHeight(extent);\n}\n\n\n/**\n * Get the size (width, height) of an extent.\n * @param {module:ol/extent~Extent} extent The extent.\n * @return {module:ol/size~Size} The extent size.\n * @api\n */\nexport function getSize(extent) {\n return [extent[2] - extent[0], extent[3] - extent[1]];\n}\n\n\n/**\n * Get the top left coordinate of an extent.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {module:ol/coordinate~Coordinate} Top left coordinate.\n * @api\n */\nexport function getTopLeft(extent) {\n return [extent[0], extent[3]];\n}\n\n\n/**\n * Get the top right coordinate of an extent.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {module:ol/coordinate~Coordinate} Top right coordinate.\n * @api\n */\nexport function getTopRight(extent) {\n return [extent[2], extent[3]];\n}\n\n\n/**\n * Get the width of an extent.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {number} Width.\n * @api\n */\nexport function getWidth(extent) {\n return extent[2] - extent[0];\n}\n\n\n/**\n * Determine if one extent intersects another.\n * @param {module:ol/extent~Extent} extent1 Extent 1.\n * @param {module:ol/extent~Extent} extent2 Extent.\n * @return {boolean} The two extents intersect.\n * @api\n */\nexport function intersects(extent1, extent2) {\n return extent1[0] <= extent2[2] &&\n extent1[2] >= extent2[0] &&\n extent1[1] <= extent2[3] &&\n extent1[3] >= extent2[1];\n}\n\n\n/**\n * Determine if an extent is empty.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {boolean} Is empty.\n * @api\n */\nexport function isEmpty(extent) {\n return extent[2] < extent[0] || extent[3] < extent[1];\n}\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {module:ol/extent~Extent=} opt_extent Extent.\n * @return {module:ol/extent~Extent} Extent.\n */\nexport function returnOrUpdate(extent, opt_extent) {\n if (opt_extent) {\n opt_extent[0] = extent[0];\n opt_extent[1] = extent[1];\n opt_extent[2] = extent[2];\n opt_extent[3] = extent[3];\n return opt_extent;\n } else {\n return extent;\n }\n}\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} value Value.\n */\nexport function scaleFromCenter(extent, value) {\n const deltaX = ((extent[2] - extent[0]) / 2) * (value - 1);\n const deltaY = ((extent[3] - extent[1]) / 2) * (value - 1);\n extent[0] -= deltaX;\n extent[2] += deltaX;\n extent[1] -= deltaY;\n extent[3] += deltaY;\n}\n\n\n/**\n * Determine if the segment between two coordinates intersects (crosses,\n * touches, or is contained by) the provided extent.\n * @param {module:ol/extent~Extent} extent The extent.\n * @param {module:ol/coordinate~Coordinate} start Segment start coordinate.\n * @param {module:ol/coordinate~Coordinate} end Segment end coordinate.\n * @return {boolean} The segment intersects the extent.\n */\nexport function intersectsSegment(extent, start, end) {\n let intersects = false;\n const startRel = coordinateRelationship(extent, start);\n const endRel = coordinateRelationship(extent, end);\n if (startRel === Relationship.INTERSECTING ||\n endRel === Relationship.INTERSECTING) {\n intersects = true;\n } else {\n const minX = extent[0];\n const minY = extent[1];\n const maxX = extent[2];\n const maxY = extent[3];\n const startX = start[0];\n const startY = start[1];\n const endX = end[0];\n const endY = end[1];\n const slope = (endY - startY) / (endX - startX);\n let x, y;\n if (!!(endRel & Relationship.ABOVE) &&\n !(startRel & Relationship.ABOVE)) {\n // potentially intersects top\n x = endX - ((endY - maxY) / slope);\n intersects = x >= minX && x <= maxX;\n }\n if (!intersects && !!(endRel & Relationship.RIGHT) &&\n !(startRel & Relationship.RIGHT)) {\n // potentially intersects right\n y = endY - ((endX - maxX) * slope);\n intersects = y >= minY && y <= maxY;\n }\n if (!intersects && !!(endRel & Relationship.BELOW) &&\n !(startRel & Relationship.BELOW)) {\n // potentially intersects bottom\n x = endX - ((endY - minY) / slope);\n intersects = x >= minX && x <= maxX;\n }\n if (!intersects && !!(endRel & Relationship.LEFT) &&\n !(startRel & Relationship.LEFT)) {\n // potentially intersects left\n y = endY - ((endX - minX) * slope);\n intersects = y >= minY && y <= maxY;\n }\n\n }\n return intersects;\n}\n\n\n/**\n * Apply a transform function to the extent.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {module:ol/proj~TransformFunction} transformFn Transform function.\n * Called with `[minX, minY, maxX, maxY]` extent coordinates.\n * @param {module:ol/extent~Extent=} opt_extent Destination extent.\n * @return {module:ol/extent~Extent} Extent.\n * @api\n */\nexport function applyTransform(extent, transformFn, opt_extent) {\n const coordinates = [\n extent[0], extent[1],\n extent[0], extent[3],\n extent[2], extent[1],\n extent[2], extent[3]\n ];\n transformFn(coordinates, coordinates, 2);\n const xs = [coordinates[0], coordinates[2], coordinates[4], coordinates[6]];\n const ys = [coordinates[1], coordinates[3], coordinates[5], coordinates[7]];\n return _boundingExtentXYs(xs, ys, opt_extent);\n}\n","/**\n * @module ol/geom/flat/transform\n */\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {module:ol/transform~Transform} transform Transform.\n * @param {Array.<number>=} opt_dest Destination.\n * @return {Array.<number>} Transformed coordinates.\n */\nexport function transform2D(flatCoordinates, offset, end, stride, transform, opt_dest) {\n const dest = opt_dest ? opt_dest : [];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n const x = flatCoordinates[j];\n const y = flatCoordinates[j + 1];\n dest[i++] = transform[0] * x + transform[2] * y + transform[4];\n dest[i++] = transform[1] * x + transform[3] * y + transform[5];\n }\n if (opt_dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} angle Angle.\n * @param {Array.<number>} anchor Rotation anchor point.\n * @param {Array.<number>=} opt_dest Destination.\n * @return {Array.<number>} Transformed coordinates.\n */\nexport function rotate(flatCoordinates, offset, end, stride, angle, anchor, opt_dest) {\n const dest = opt_dest ? opt_dest : [];\n const cos = Math.cos(angle);\n const sin = Math.sin(angle);\n const anchorX = anchor[0];\n const anchorY = anchor[1];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n const deltaX = flatCoordinates[j] - anchorX;\n const deltaY = flatCoordinates[j + 1] - anchorY;\n dest[i++] = anchorX + deltaX * cos - deltaY * sin;\n dest[i++] = anchorY + deltaX * sin + deltaY * cos;\n for (let k = j + 2; k < j + stride; ++k) {\n dest[i++] = flatCoordinates[k];\n }\n }\n if (opt_dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n\n/**\n * Scale the coordinates.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} sx Scale factor in the x-direction.\n * @param {number} sy Scale factor in the y-direction.\n * @param {Array.<number>} anchor Scale anchor point.\n * @param {Array.<number>=} opt_dest Destination.\n * @return {Array.<number>} Transformed coordinates.\n */\nexport function scale(flatCoordinates, offset, end, stride, sx, sy, anchor, opt_dest) {\n const dest = opt_dest ? opt_dest : [];\n const anchorX = anchor[0];\n const anchorY = anchor[1];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n const deltaX = flatCoordinates[j] - anchorX;\n const deltaY = flatCoordinates[j + 1] - anchorY;\n dest[i++] = anchorX + sx * deltaX;\n dest[i++] = anchorY + sy * deltaY;\n for (let k = j + 2; k < j + stride; ++k) {\n dest[i++] = flatCoordinates[k];\n }\n }\n if (opt_dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @param {Array.<number>=} opt_dest Destination.\n * @return {Array.<number>} Transformed coordinates.\n */\nexport function translate(flatCoordinates, offset, end, stride, deltaX, deltaY, opt_dest) {\n const dest = opt_dest ? opt_dest : [];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n dest[i++] = flatCoordinates[j] + deltaX;\n dest[i++] = flatCoordinates[j + 1] + deltaY;\n for (let k = j + 2; k < j + stride; ++k) {\n dest[i++] = flatCoordinates[k];\n }\n }\n if (opt_dest && dest.length != i) {\n dest.length = i;\n }\n return dest;\n}\n","/**\n * @module ol/math\n */\nimport {assert} from './asserts.js';\n\n/**\n * Takes a number and clamps it to within the provided bounds.\n * @param {number} value The input number.\n * @param {number} min The minimum value to return.\n * @param {number} max The maximum value to return.\n * @return {number} The input number if it is within bounds, or the nearest\n * number within the bounds.\n */\nexport function clamp(value, min, max) {\n return Math.min(Math.max(value, min), max);\n}\n\n\n/**\n * Return the hyperbolic cosine of a given number. The method will use the\n * native `Math.cosh` function if it is available, otherwise the hyperbolic\n * cosine will be calculated via the reference implementation of the Mozilla\n * developer network.\n *\n * @param {number} x X.\n * @return {number} Hyperbolic cosine of x.\n */\nexport const cosh = (function() {\n // Wrapped in a iife, to save the overhead of checking for the native\n // implementation on every invocation.\n let cosh;\n if ('cosh' in Math) {\n // The environment supports the native Math.cosh function, use it…\n cosh = Math.cosh;\n } else {\n // … else, use the reference implementation of MDN:\n cosh = function(x) {\n const y = Math.exp(x);\n return (y + 1 / y) / 2;\n };\n }\n return cosh;\n}());\n\n\n/**\n * @param {number} x X.\n * @return {number} The smallest power of two greater than or equal to x.\n */\nexport function roundUpToPowerOfTwo(x) {\n assert(0 < x, 29); // `x` must be greater than `0`\n return Math.pow(2, Math.ceil(Math.log(x) / Math.LN2));\n}\n\n\n/**\n * Returns the square of the closest distance between the point (x, y) and the\n * line segment (x1, y1) to (x2, y2).\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredSegmentDistance(x, y, x1, y1, x2, y2) {\n const dx = x2 - x1;\n const dy = y2 - y1;\n if (dx !== 0 || dy !== 0) {\n const t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n if (t > 1) {\n x1 = x2;\n y1 = y2;\n } else if (t > 0) {\n x1 += dx * t;\n y1 += dy * t;\n }\n }\n return squaredDistance(x, y, x1, y1);\n}\n\n\n/**\n * Returns the square of the distance between the points (x1, y1) and (x2, y2).\n * @param {number} x1 X1.\n * @param {number} y1 Y1.\n * @param {number} x2 X2.\n * @param {number} y2 Y2.\n * @return {number} Squared distance.\n */\nexport function squaredDistance(x1, y1, x2, y2) {\n const dx = x2 - x1;\n const dy = y2 - y1;\n return dx * dx + dy * dy;\n}\n\n\n/**\n * Solves system of linear equations using Gaussian elimination method.\n *\n * @param {Array.<Array.<number>>} mat Augmented matrix (n x n + 1 column)\n * in row-major order.\n * @return {Array.<number>} The resulting vector.\n */\nexport function solveLinearSystem(mat) {\n const n = mat.length;\n\n for (let i = 0; i < n; i++) {\n // Find max in the i-th column (ignoring i - 1 first rows)\n let maxRow = i;\n let maxEl = Math.abs(mat[i][i]);\n for (let r = i + 1; r < n; r++) {\n const absValue = Math.abs(mat[r][i]);\n if (absValue > maxEl) {\n maxEl = absValue;\n maxRow = r;\n }\n }\n\n if (maxEl === 0) {\n return null; // matrix is singular\n }\n\n // Swap max row with i-th (current) row\n const tmp = mat[maxRow];\n mat[maxRow] = mat[i];\n mat[i] = tmp;\n\n // Subtract the i-th row to make all the remaining rows 0 in the i-th column\n for (let j = i + 1; j < n; j++) {\n const coef = -mat[j][i] / mat[i][i];\n for (let k = i; k < n + 1; k++) {\n if (i == k) {\n mat[j][k] = 0;\n } else {\n mat[j][k] += coef * mat[i][k];\n }\n }\n }\n }\n\n // Solve Ax=b for upper triangular matrix A (mat)\n const x = new Array(n);\n for (let l = n - 1; l >= 0; l--) {\n x[l] = mat[l][n] / mat[l][l];\n for (let m = l - 1; m >= 0; m--) {\n mat[m][n] -= mat[m][l] * x[l];\n }\n }\n return x;\n}\n\n\n/**\n * Converts radians to to degrees.\n *\n * @param {number} angleInRadians Angle in radians.\n * @return {number} Angle in degrees.\n */\nexport function toDegrees(angleInRadians) {\n return angleInRadians * 180 / Math.PI;\n}\n\n\n/**\n * Converts degrees to radians.\n *\n * @param {number} angleInDegrees Angle in degrees.\n * @return {number} Angle in radians.\n */\nexport function toRadians(angleInDegrees) {\n return angleInDegrees * Math.PI / 180;\n}\n\n/**\n * Returns the modulo of a / b, depending on the sign of b.\n *\n * @param {number} a Dividend.\n * @param {number} b Divisor.\n * @return {number} Modulo.\n */\nexport function modulo(a, b) {\n const r = a % b;\n return r * b < 0 ? r + b : r;\n}\n\n/**\n * Calculates the linearly interpolated value of x between a and b.\n *\n * @param {number} a Number\n * @param {number} b Number\n * @param {number} x Value to be interpolated.\n * @return {number} Interpolated value.\n */\nexport function lerp(a, b, x) {\n return a + x * (b - a);\n}\n","/**\n * @module ol/geom/GeometryType\n */\n\n/**\n * The geometry type. One of `'Point'`, `'LineString'`, `'LinearRing'`,\n * `'Polygon'`, `'MultiPoint'`, `'MultiLineString'`, `'MultiPolygon'`,\n * `'GeometryCollection'`, `'Circle'`.\n * @enum {string}\n */\nexport default {\n POINT: 'Point',\n LINE_STRING: 'LineString',\n LINEAR_RING: 'LinearRing',\n POLYGON: 'Polygon',\n MULTI_POINT: 'MultiPoint',\n MULTI_LINE_STRING: 'MultiLineString',\n MULTI_POLYGON: 'MultiPolygon',\n GEOMETRY_COLLECTION: 'GeometryCollection',\n CIRCLE: 'Circle'\n};\n","/**\n * @license\n * Latitude/longitude spherical geodesy formulae taken from\n * http://www.movable-type.co.uk/scripts/latlong.html\n * Licensed under CC-BY-3.0.\n */\n\n/**\n * @module ol/sphere\n */\nimport {toRadians, toDegrees} from './math.js';\nimport GeometryType from './geom/GeometryType.js';\n\n\n/**\n * Object literal with options for the {@link getLength} or {@link getArea}\n * functions.\n * @typedef {Object} SphereMetricOptions\n * @property {module:ol/proj~ProjectionLike} [projection='EPSG:3857']\n * Projection of the geometry. By default, the geometry is assumed to be in\n * Web Mercator.\n * @property {number} [radius=6371008.8] Sphere radius. By default, the radius of the\n * earth is used (Clarke 1866 Authalic Sphere).\n */\n\n\n/**\n * The mean Earth radius (1/3 * (2a + b)) for the WGS84 ellipsoid.\n * https://en.wikipedia.org/wiki/Earth_radius#Mean_radius\n * @type {number}\n */\nexport const DEFAULT_RADIUS = 6371008.8;\n\n\n/**\n * Get the great circle distance (in meters) between two geographic coordinates.\n * @param {Array} c1 Starting coordinate.\n * @param {Array} c2 Ending coordinate.\n * @param {number=} opt_radius The sphere radius to use. Defaults to the Earth's\n * mean radius using the WGS84 ellipsoid.\n * @return {number} The great circle distance between the points (in meters).\n * @api\n */\nexport function getDistance(c1, c2, opt_radius) {\n const radius = opt_radius || DEFAULT_RADIUS;\n const lat1 = toRadians(c1[1]);\n const lat2 = toRadians(c2[1]);\n const deltaLatBy2 = (lat2 - lat1) / 2;\n const deltaLonBy2 = toRadians(c2[0] - c1[0]) / 2;\n const a = Math.sin(deltaLatBy2) * Math.sin(deltaLatBy2) +\n Math.sin(deltaLonBy2) * Math.sin(deltaLonBy2) *\n Math.cos(lat1) * Math.cos(lat2);\n return 2 * radius * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));\n}\n\n\n/**\n * Get the cumulative great circle length of linestring coordinates (geographic).\n * @param {Array} coordinates Linestring coordinates.\n * @param {number} radius The sphere radius to use.\n * @return {number} The length (in meters).\n */\nfunction getLengthInternal(coordinates, radius) {\n let length = 0;\n for (let i = 0, ii = coordinates.length; i < ii - 1; ++i) {\n length += getDistance(coordinates[i], coordinates[i + 1], radius);\n }\n return length;\n}\n\n\n/**\n * Get the spherical length of a geometry. This length is the sum of the\n * great circle distances between coordinates. For polygons, the length is\n * the sum of all rings. For points, the length is zero. For multi-part\n * geometries, the length is the sum of the length of each part.\n * @param {module:ol/geom/Geometry} geometry A geometry.\n * @param {module:ol/sphere~SphereMetricOptions=} opt_options Options for the\n * length calculation. By default, geometries are assumed to be in 'EPSG:3857'.\n * You can change this by providing a `projection` option.\n * @return {number} The spherical length (in meters).\n * @api\n */\nexport function getLength(geometry, opt_options) {\n const options = opt_options || {};\n const radius = options.radius || DEFAULT_RADIUS;\n const projection = options.projection || 'EPSG:3857';\n const type = geometry.getType();\n if (type !== GeometryType.GEOMETRY_COLLECTION) {\n geometry = geometry.clone().transform(projection, 'EPSG:4326');\n }\n let length = 0;\n let coordinates, coords, i, ii, j, jj;\n switch (type) {\n case GeometryType.POINT:\n case GeometryType.MULTI_POINT: {\n break;\n }\n case GeometryType.LINE_STRING:\n case GeometryType.LINEAR_RING: {\n coordinates = /** @type {module:ol/geom/SimpleGeometry} */ (geometry).getCoordinates();\n length = getLengthInternal(coordinates, radius);\n break;\n }\n case GeometryType.MULTI_LINE_STRING:\n case GeometryType.POLYGON: {\n coordinates = /** @type {module:ol/geom/SimpleGeometry} */ (geometry).getCoordinates();\n for (i = 0, ii = coordinates.length; i < ii; ++i) {\n length += getLengthInternal(coordinates[i], radius);\n }\n break;\n }\n case GeometryType.MULTI_POLYGON: {\n coordinates = /** @type {module:ol/geom/SimpleGeometry} */ (geometry).getCoordinates();\n for (i = 0, ii = coordinates.length; i < ii; ++i) {\n coords = coordinates[i];\n for (j = 0, jj = coords.length; j < jj; ++j) {\n length += getLengthInternal(coords[j], radius);\n }\n }\n break;\n }\n case GeometryType.GEOMETRY_COLLECTION: {\n const geometries = /** @type {module:ol/geom/GeometryCollection} */ (geometry).getGeometries();\n for (i = 0, ii = geometries.length; i < ii; ++i) {\n length += getLength(geometries[i], opt_options);\n }\n break;\n }\n default: {\n throw new Error('Unsupported geometry type: ' + type);\n }\n }\n return length;\n}\n\n\n/**\n * Returns the spherical area for a list of coordinates.\n *\n * [Reference](https://trs-new.jpl.nasa.gov/handle/2014/40409)\n * Robert. G. Chamberlain and William H. Duquette, \"Some Algorithms for\n * Polygons on a Sphere\", JPL Publication 07-03, Jet Propulsion\n * Laboratory, Pasadena, CA, June 2007\n *\n * @param {Array.<module:ol/coordinate~Coordinate>} coordinates List of coordinates of a linear\n * ring. If the ring is oriented clockwise, the area will be positive,\n * otherwise it will be negative.\n * @param {number} radius The sphere radius.\n * @return {number} Area (in square meters).\n */\nfunction getAreaInternal(coordinates, radius) {\n let area = 0;\n const len = coordinates.length;\n let x1 = coordinates[len - 1][0];\n let y1 = coordinates[len - 1][1];\n for (let i = 0; i < len; i++) {\n const x2 = coordinates[i][0];\n const y2 = coordinates[i][1];\n area += toRadians(x2 - x1) *\n (2 + Math.sin(toRadians(y1)) +\n Math.sin(toRadians(y2)));\n x1 = x2;\n y1 = y2;\n }\n return area * radius * radius / 2.0;\n}\n\n\n/**\n * Get the spherical area of a geometry. This is the area (in meters) assuming\n * that polygon edges are segments of great circles on a sphere.\n * @param {module:ol/geom/Geometry} geometry A geometry.\n * @param {module:ol/sphere~SphereMetricOptions=} opt_options Options for the area\n * calculation. By default, geometries are assumed to be in 'EPSG:3857'.\n * You can change this by providing a `projection` option.\n * @return {number} The spherical area (in square meters).\n * @api\n */\nexport function getArea(geometry, opt_options) {\n const options = opt_options || {};\n const radius = options.radius || DEFAULT_RADIUS;\n const projection = options.projection || 'EPSG:3857';\n const type = geometry.getType();\n if (type !== GeometryType.GEOMETRY_COLLECTION) {\n geometry = geometry.clone().transform(projection, 'EPSG:4326');\n }\n let area = 0;\n let coordinates, coords, i, ii, j, jj;\n switch (type) {\n case GeometryType.POINT:\n case GeometryType.MULTI_POINT:\n case GeometryType.LINE_STRING:\n case GeometryType.MULTI_LINE_STRING:\n case GeometryType.LINEAR_RING: {\n break;\n }\n case GeometryType.POLYGON: {\n coordinates = /** @type {module:ol/geom/Polygon} */ (geometry).getCoordinates();\n area = Math.abs(getAreaInternal(coordinates[0], radius));\n for (i = 1, ii = coordinates.length; i < ii; ++i) {\n area -= Math.abs(getAreaInternal(coordinates[i], radius));\n }\n break;\n }\n case GeometryType.MULTI_POLYGON: {\n coordinates = /** @type {module:ol/geom/SimpleGeometry} */ (geometry).getCoordinates();\n for (i = 0, ii = coordinates.length; i < ii; ++i) {\n coords = coordinates[i];\n area += Math.abs(getAreaInternal(coords[0], radius));\n for (j = 1, jj = coords.length; j < jj; ++j) {\n area -= Math.abs(getAreaInternal(coords[j], radius));\n }\n }\n break;\n }\n case GeometryType.GEOMETRY_COLLECTION: {\n const geometries = /** @type {module:ol/geom/GeometryCollection} */ (geometry).getGeometries();\n for (i = 0, ii = geometries.length; i < ii; ++i) {\n area += getArea(geometries[i], opt_options);\n }\n break;\n }\n default: {\n throw new Error('Unsupported geometry type: ' + type);\n }\n }\n return area;\n}\n\n\n/**\n * Returns the coordinate at the given distance and bearing from `c1`.\n *\n * @param {module:ol/coordinate~Coordinate} c1 The origin point (`[lon, lat]` in degrees).\n * @param {number} distance The great-circle distance between the origin\n * point and the target point.\n * @param {number} bearing The bearing (in radians).\n * @param {number=} opt_radius The sphere radius to use. Defaults to the Earth's\n * mean radius using the WGS84 ellipsoid.\n * @return {module:ol/coordinate~Coordinate} The target point.\n */\nexport function offset(c1, distance, bearing, opt_radius) {\n const radius = opt_radius || DEFAULT_RADIUS;\n const lat1 = toRadians(c1[1]);\n const lon1 = toRadians(c1[0]);\n const dByR = distance / radius;\n const lat = Math.asin(\n Math.sin(lat1) * Math.cos(dByR) +\n Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing));\n const lon = lon1 + Math.atan2(\n Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1),\n Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat));\n return [toDegrees(lon), toDegrees(lat)];\n}\n","/**\n * @module ol/proj/Units\n */\n\n/**\n * Projection units: `'degrees'`, `'ft'`, `'m'`, `'pixels'`, `'tile-pixels'` or\n * `'us-ft'`.\n * @enum {string}\n */\nconst Units = {\n DEGREES: 'degrees',\n FEET: 'ft',\n METERS: 'm',\n PIXELS: 'pixels',\n TILE_PIXELS: 'tile-pixels',\n USFEET: 'us-ft'\n};\n\n\n/**\n * Meters per unit lookup table.\n * @const\n * @type {Object.<module:ol/proj/Units, number>}\n * @api\n */\nexport const METERS_PER_UNIT = {};\n// use the radius of the Normal sphere\nMETERS_PER_UNIT[Units.DEGREES] = 2 * Math.PI * 6370997 / 360;\nMETERS_PER_UNIT[Units.FEET] = 0.3048;\nMETERS_PER_UNIT[Units.METERS] = 1;\nMETERS_PER_UNIT[Units.USFEET] = 1200 / 3937;\n\nexport default Units;\n","/**\n * @module ol/proj/Projection\n */\nimport {METERS_PER_UNIT} from '../proj/Units.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} code The SRS identifier code, e.g. `EPSG:4326`.\n * @property {module:ol/proj/Units|string} [units] Units. Required unless a\n * proj4 projection is defined for `code`.\n * @property {module:ol/extent~Extent} [extent] The validity extent for the SRS.\n * @property {string} [axisOrientation='enu'] The axis orientation as specified in Proj4.\n * @property {boolean} [global=false] Whether the projection is valid for the whole globe.\n * @property {number} [metersPerUnit] The meters per unit for the SRS.\n * If not provided, the `units` are used to get the meters per unit from the {@link module:ol/proj/Units~METERS_PER_UNIT}\n * lookup table.\n * @property {module:ol/extent~Extent} [worldExtent] The world extent for the SRS.\n * @property {function(number, module:ol/coordinate~Coordinate):number} [getPointResolution]\n * Function to determine resolution at a point. The function is called with a\n * `{number}` view resolution and an `{module:ol/coordinate~Coordinate}` as arguments, and returns\n * the `{number}` resolution at the passed coordinate. If this is `undefined`,\n * the default {@link module:ol/proj#getPointResolution} function will be used.\n */\n\n\n/**\n * @classdesc\n * Projection definition class. One of these is created for each projection\n * supported in the application and stored in the {@link module:ol/proj} namespace.\n * You can use these in applications, but this is not required, as API params\n * and options use {@link module:ol/proj~ProjectionLike} which means the simple string\n * code will suffice.\n *\n * You can use {@link module:ol/proj~get} to retrieve the object for a particular\n * projection.\n *\n * The library includes definitions for `EPSG:4326` and `EPSG:3857`, together\n * with the following aliases:\n * * `EPSG:4326`: CRS:84, urn:ogc:def:crs:EPSG:6.6:4326,\n * urn:ogc:def:crs:OGC:1.3:CRS84, urn:ogc:def:crs:OGC:2:84,\n * http://www.opengis.net/gml/srs/epsg.xml#4326,\n * urn:x-ogc:def:crs:EPSG:4326\n * * `EPSG:3857`: EPSG:102100, EPSG:102113, EPSG:900913,\n * urn:ogc:def:crs:EPSG:6.18:3:3857,\n * http://www.opengis.net/gml/srs/epsg.xml#3857\n *\n * If you use proj4js, aliases can be added using `proj4.defs()`; see\n * [documentation](https://github.com/proj4js/proj4js). To set an alternative\n * namespace for proj4, use {@link module:ol/proj~setProj4}.\n *\n * @constructor\n * @param {module:ol/proj/Projection~Options} options Projection options.\n * @struct\n * @api\n */\nconst Projection = function(options) {\n /**\n * @private\n * @type {string}\n */\n this.code_ = options.code;\n\n /**\n * Units of projected coordinates. When set to `TILE_PIXELS`, a\n * `this.extent_` and `this.worldExtent_` must be configured properly for each\n * tile.\n * @private\n * @type {module:ol/proj/Units}\n */\n this.units_ = /** @type {module:ol/proj/Units} */ (options.units);\n\n /**\n * Validity extent of the projection in projected coordinates. For projections\n * with `TILE_PIXELS` units, this is the extent of the tile in\n * tile pixel space.\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.extent_ = options.extent !== undefined ? options.extent : null;\n\n /**\n * Extent of the world in EPSG:4326. For projections with\n * `TILE_PIXELS` units, this is the extent of the tile in\n * projected coordinate space.\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.worldExtent_ = options.worldExtent !== undefined ?\n options.worldExtent : null;\n\n /**\n * @private\n * @type {string}\n */\n this.axisOrientation_ = options.axisOrientation !== undefined ?\n options.axisOrientation : 'enu';\n\n /**\n * @private\n * @type {boolean}\n */\n this.global_ = options.global !== undefined ? options.global : false;\n\n /**\n * @private\n * @type {boolean}\n */\n this.canWrapX_ = !!(this.global_ && this.extent_);\n\n /**\n * @private\n * @type {function(number, module:ol/coordinate~Coordinate):number|undefined}\n */\n this.getPointResolutionFunc_ = options.getPointResolution;\n\n /**\n * @private\n * @type {module:ol/tilegrid/TileGrid}\n */\n this.defaultTileGrid_ = null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.metersPerUnit_ = options.metersPerUnit;\n};\n\n\n/**\n * @return {boolean} The projection is suitable for wrapping the x-axis\n */\nProjection.prototype.canWrapX = function() {\n return this.canWrapX_;\n};\n\n\n/**\n * Get the code for this projection, e.g. 'EPSG:4326'.\n * @return {string} Code.\n * @api\n */\nProjection.prototype.getCode = function() {\n return this.code_;\n};\n\n\n/**\n * Get the validity extent for this projection.\n * @return {module:ol/extent~Extent} Extent.\n * @api\n */\nProjection.prototype.getExtent = function() {\n return this.extent_;\n};\n\n\n/**\n * Get the units of this projection.\n * @return {module:ol/proj/Units} Units.\n * @api\n */\nProjection.prototype.getUnits = function() {\n return this.units_;\n};\n\n\n/**\n * Get the amount of meters per unit of this projection. If the projection is\n * not configured with `metersPerUnit` or a units identifier, the return is\n * `undefined`.\n * @return {number|undefined} Meters.\n * @api\n */\nProjection.prototype.getMetersPerUnit = function() {\n return this.metersPerUnit_ || METERS_PER_UNIT[this.units_];\n};\n\n\n/**\n * Get the world extent for this projection.\n * @return {module:ol/extent~Extent} Extent.\n * @api\n */\nProjection.prototype.getWorldExtent = function() {\n return this.worldExtent_;\n};\n\n\n/**\n * Get the axis orientation of this projection.\n * Example values are:\n * enu - the default easting, northing, elevation.\n * neu - northing, easting, up - useful for \"lat/long\" geographic coordinates,\n * or south orientated transverse mercator.\n * wnu - westing, northing, up - some planetary coordinate systems have\n * \"west positive\" coordinate systems\n * @return {string} Axis orientation.\n * @api\n */\nProjection.prototype.getAxisOrientation = function() {\n return this.axisOrientation_;\n};\n\n\n/**\n * Is this projection a global projection which spans the whole world?\n * @return {boolean} Whether the projection is global.\n * @api\n */\nProjection.prototype.isGlobal = function() {\n return this.global_;\n};\n\n\n/**\n* Set if the projection is a global projection which spans the whole world\n* @param {boolean} global Whether the projection is global.\n* @api\n*/\nProjection.prototype.setGlobal = function(global) {\n this.global_ = global;\n this.canWrapX_ = !!(global && this.extent_);\n};\n\n\n/**\n * @return {module:ol/tilegrid/TileGrid} The default tile grid.\n */\nProjection.prototype.getDefaultTileGrid = function() {\n return this.defaultTileGrid_;\n};\n\n\n/**\n * @param {module:ol/tilegrid/TileGrid} tileGrid The default tile grid.\n */\nProjection.prototype.setDefaultTileGrid = function(tileGrid) {\n this.defaultTileGrid_ = tileGrid;\n};\n\n\n/**\n * Set the validity extent for this projection.\n * @param {module:ol/extent~Extent} extent Extent.\n * @api\n */\nProjection.prototype.setExtent = function(extent) {\n this.extent_ = extent;\n this.canWrapX_ = !!(this.global_ && extent);\n};\n\n\n/**\n * Set the world extent for this projection.\n * @param {module:ol/extent~Extent} worldExtent World extent\n * [minlon, minlat, maxlon, maxlat].\n * @api\n */\nProjection.prototype.setWorldExtent = function(worldExtent) {\n this.worldExtent_ = worldExtent;\n};\n\n\n/**\n * Set the getPointResolution function (see {@link module:ol/proj~getPointResolution}\n * for this projection.\n * @param {function(number, module:ol/coordinate~Coordinate):number} func Function\n * @api\n */\nProjection.prototype.setGetPointResolution = function(func) {\n this.getPointResolutionFunc_ = func;\n};\n\n\n/**\n * Get the custom point resolution function for this projection (if set).\n * @return {function(number, module:ol/coordinate~Coordinate):number|undefined} The custom point\n * resolution function (if set).\n */\nProjection.prototype.getPointResolutionFunc = function() {\n return this.getPointResolutionFunc_;\n};\nexport default Projection;\n","/**\n * @module ol/proj/epsg3857\n */\nimport {inherits} from '../util.js';\nimport {cosh} from '../math.js';\nimport Projection from '../proj/Projection.js';\nimport Units from '../proj/Units.js';\n\n\n/**\n * Radius of WGS84 sphere\n *\n * @const\n * @type {number}\n */\nexport const RADIUS = 6378137;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const HALF_SIZE = Math.PI * RADIUS;\n\n\n/**\n * @const\n * @type {module:ol/extent~Extent}\n */\nexport const EXTENT = [\n -HALF_SIZE, -HALF_SIZE,\n HALF_SIZE, HALF_SIZE\n];\n\n\n/**\n * @const\n * @type {module:ol/extent~Extent}\n */\nexport const WORLD_EXTENT = [-180, -85, 180, 85];\n\n\n/**\n * @classdesc\n * Projection object for web/spherical Mercator (EPSG:3857).\n *\n * @constructor\n * @extends {module:ol/proj/Projection}\n * @param {string} code Code.\n */\nfunction EPSG3857Projection(code) {\n Projection.call(this, {\n code: code,\n units: Units.METERS,\n extent: EXTENT,\n global: true,\n worldExtent: WORLD_EXTENT,\n getPointResolution: function(resolution, point) {\n return resolution / cosh(point[1] / RADIUS);\n }\n });\n}\ninherits(EPSG3857Projection, Projection);\n\n\n/**\n * Projections equal to EPSG:3857.\n *\n * @const\n * @type {Array.<module:ol/proj/Projection>}\n */\nexport const PROJECTIONS = [\n new EPSG3857Projection('EPSG:3857'),\n new EPSG3857Projection('EPSG:102100'),\n new EPSG3857Projection('EPSG:102113'),\n new EPSG3857Projection('EPSG:900913'),\n new EPSG3857Projection('urn:ogc:def:crs:EPSG:6.18:3:3857'),\n new EPSG3857Projection('urn:ogc:def:crs:EPSG::3857'),\n new EPSG3857Projection('http://www.opengis.net/gml/srs/epsg.xml#3857')\n];\n\n\n/**\n * Transformation from EPSG:4326 to EPSG:3857.\n *\n * @param {Array.<number>} input Input array of coordinate values.\n * @param {Array.<number>=} opt_output Output array of coordinate values.\n * @param {number=} opt_dimension Dimension (default is `2`).\n * @return {Array.<number>} Output array of coordinate values.\n */\nexport function fromEPSG4326(input, opt_output, opt_dimension) {\n const length = input.length;\n const dimension = opt_dimension > 1 ? opt_dimension : 2;\n let output = opt_output;\n if (output === undefined) {\n if (dimension > 2) {\n // preserve values beyond second dimension\n output = input.slice();\n } else {\n output = new Array(length);\n }\n }\n const halfSize = HALF_SIZE;\n for (let i = 0; i < length; i += dimension) {\n output[i] = halfSize * input[i] / 180;\n let y = RADIUS *\n Math.log(Math.tan(Math.PI * (input[i + 1] + 90) / 360));\n if (y > halfSize) {\n y = halfSize;\n } else if (y < -halfSize) {\n y = -halfSize;\n }\n output[i + 1] = y;\n }\n return output;\n}\n\n\n/**\n * Transformation from EPSG:3857 to EPSG:4326.\n *\n * @param {Array.<number>} input Input array of coordinate values.\n * @param {Array.<number>=} opt_output Output array of coordinate values.\n * @param {number=} opt_dimension Dimension (default is `2`).\n * @return {Array.<number>} Output array of coordinate values.\n */\nexport function toEPSG4326(input, opt_output, opt_dimension) {\n const length = input.length;\n const dimension = opt_dimension > 1 ? opt_dimension : 2;\n let output = opt_output;\n if (output === undefined) {\n if (dimension > 2) {\n // preserve values beyond second dimension\n output = input.slice();\n } else {\n output = new Array(length);\n }\n }\n for (let i = 0; i < length; i += dimension) {\n output[i] = 180 * input[i] / HALF_SIZE;\n output[i + 1] = 360 * Math.atan(\n Math.exp(input[i + 1] / RADIUS)) / Math.PI - 90;\n }\n return output;\n}\n","/**\n * @module ol/proj/epsg4326\n */\nimport {inherits} from '../util.js';\nimport Projection from '../proj/Projection.js';\nimport Units from '../proj/Units.js';\n\n\n/**\n * Semi-major radius of the WGS84 ellipsoid.\n *\n * @const\n * @type {number}\n */\nexport const RADIUS = 6378137;\n\n\n/**\n * Extent of the EPSG:4326 projection which is the whole world.\n *\n * @const\n * @type {module:ol/extent~Extent}\n */\nexport const EXTENT = [-180, -90, 180, 90];\n\n\n/**\n * @const\n * @type {number}\n */\nexport const METERS_PER_UNIT = Math.PI * RADIUS / 180;\n\n\n/**\n * @classdesc\n * Projection object for WGS84 geographic coordinates (EPSG:4326).\n *\n * Note that OpenLayers does not strictly comply with the EPSG definition.\n * The EPSG registry defines 4326 as a CRS for Latitude,Longitude (y,x).\n * OpenLayers treats EPSG:4326 as a pseudo-projection, with x,y coordinates.\n *\n * @constructor\n * @extends {module:ol/proj/Projection}\n * @param {string} code Code.\n * @param {string=} opt_axisOrientation Axis orientation.\n */\nfunction EPSG4326Projection(code, opt_axisOrientation) {\n Projection.call(this, {\n code: code,\n units: Units.DEGREES,\n extent: EXTENT,\n axisOrientation: opt_axisOrientation,\n global: true,\n metersPerUnit: METERS_PER_UNIT,\n worldExtent: EXTENT\n });\n}\ninherits(EPSG4326Projection, Projection);\n\n\n/**\n * Projections equal to EPSG:4326.\n *\n * @const\n * @type {Array.<module:ol/proj/Projection>}\n */\nexport const PROJECTIONS = [\n new EPSG4326Projection('CRS:84'),\n new EPSG4326Projection('EPSG:4326', 'neu'),\n new EPSG4326Projection('urn:ogc:def:crs:EPSG::4326', 'neu'),\n new EPSG4326Projection('urn:ogc:def:crs:EPSG:6.6:4326', 'neu'),\n new EPSG4326Projection('urn:ogc:def:crs:OGC:1.3:CRS84'),\n new EPSG4326Projection('urn:ogc:def:crs:OGC:2:84'),\n new EPSG4326Projection('http://www.opengis.net/gml/srs/epsg.xml#4326', 'neu'),\n new EPSG4326Projection('urn:x-ogc:def:crs:EPSG:4326', 'neu')\n];\n","/**\n * @module ol/proj/projections\n */\n\n\n/**\n * @type {Object.<string, module:ol/proj/Projection>}\n */\nlet cache = {};\n\n\n/**\n * Clear the projections cache.\n */\nexport function clear() {\n cache = {};\n}\n\n\n/**\n * Get a cached projection by code.\n * @param {string} code The code for the projection.\n * @return {module:ol/proj/Projection} The projection (if cached).\n */\nexport function get(code) {\n return cache[code] || null;\n}\n\n\n/**\n * Add a projection to the cache.\n * @param {string} code The projection code.\n * @param {module:ol/proj/Projection} projection The projection to cache.\n */\nexport function add(code, projection) {\n cache[code] = projection;\n}\n","/**\n * @module ol/proj/transforms\n */\nimport {isEmpty} from '../obj.js';\n\n\n/**\n * @private\n * @type {!Object.<string, Object.<string, module:ol/proj~TransformFunction>>}\n */\nlet transforms = {};\n\n\n/**\n * Clear the transform cache.\n */\nexport function clear() {\n transforms = {};\n}\n\n\n/**\n * Registers a conversion function to convert coordinates from the source\n * projection to the destination projection.\n *\n * @param {module:ol/proj/Projection} source Source.\n * @param {module:ol/proj/Projection} destination Destination.\n * @param {module:ol/proj~TransformFunction} transformFn Transform.\n */\nexport function add(source, destination, transformFn) {\n const sourceCode = source.getCode();\n const destinationCode = destination.getCode();\n if (!(sourceCode in transforms)) {\n transforms[sourceCode] = {};\n }\n transforms[sourceCode][destinationCode] = transformFn;\n}\n\n\n/**\n * Unregisters the conversion function to convert coordinates from the source\n * projection to the destination projection. This method is used to clean up\n * cached transforms during testing.\n *\n * @param {module:ol/proj/Projection} source Source projection.\n * @param {module:ol/proj/Projection} destination Destination projection.\n * @return {module:ol/proj~TransformFunction} transformFn The unregistered transform.\n */\nexport function remove(source, destination) {\n const sourceCode = source.getCode();\n const destinationCode = destination.getCode();\n const transform = transforms[sourceCode][destinationCode];\n delete transforms[sourceCode][destinationCode];\n if (isEmpty(transforms[sourceCode])) {\n delete transforms[sourceCode];\n }\n return transform;\n}\n\n\n/**\n * Get a transform given a source code and a destination code.\n * @param {string} sourceCode The code for the source projection.\n * @param {string} destinationCode The code for the destination projection.\n * @return {module:ol/proj~TransformFunction|undefined} The transform function (if found).\n */\nexport function get(sourceCode, destinationCode) {\n let transform;\n if (sourceCode in transforms && destinationCode in transforms[sourceCode]) {\n transform = transforms[sourceCode][destinationCode];\n }\n return transform;\n}\n","/**\n * @module ol/proj\n */\n\n/**\n * The ol/proj module stores:\n * * a list of {@link module:ol/proj/Projection}\n * objects, one for each projection supported by the application\n * * a list of transform functions needed to convert coordinates in one projection\n * into another.\n *\n * The static functions are the methods used to maintain these.\n * Each transform function can handle not only simple coordinate pairs, but also\n * large arrays of coordinates such as vector geometries.\n *\n * When loaded, the library adds projection objects for EPSG:4326 (WGS84\n * geographic coordinates) and EPSG:3857 (Web or Spherical Mercator, as used\n * for example by Bing Maps or OpenStreetMap), together with the relevant\n * transform functions.\n *\n * Additional transforms may be added by using the {@link http://proj4js.org/}\n * library (version 2.2 or later). You can use the full build supplied by\n * Proj4js, or create a custom build to support those projections you need; see\n * the Proj4js website for how to do this. You also need the Proj4js definitions\n * for the required projections. These definitions can be obtained from\n * {@link https://epsg.io/}, and are a JS function, so can be loaded in a script\n * tag (as in the examples) or pasted into your application.\n *\n * After all required projection definitions are added to proj4's registry (by\n * using `proj4.defs()`), simply call `register(proj4)` from the `ol/proj/proj4`\n * package. Existing transforms are not changed by this function. See\n * examples/wms-image-custom-proj for an example of this.\n *\n * Additional projection definitions can be registered with `proj4.defs()` any\n * time. Just make sure to call `register(proj4)` again; for example, with user-supplied data where you don't\n * know in advance what projections are needed, you can initially load minimal\n * support and then load whichever are requested.\n *\n * Note that Proj4js does not support projection extents. If you want to add\n * one for creating default tile grids, you can add it after the Projection\n * object has been created with `setExtent`, for example,\n * `get('EPSG:1234').setExtent(extent)`.\n *\n * In addition to Proj4js support, any transform functions can be added with\n * {@link module:ol/proj~addCoordinateTransforms}. To use this, you must first create\n * a {@link module:ol/proj/Projection} object for the new projection and add it with\n * {@link module:ol/proj~addProjection}. You can then add the forward and inverse\n * functions with {@link module:ol/proj~addCoordinateTransforms}. See\n * examples/wms-custom-proj for an example of this.\n *\n * Note that if no transforms are needed and you only need to define the\n * projection, just add a {@link module:ol/proj/Projection} with\n * {@link module:ol/proj~addProjection}. See examples/wms-no-proj for an example of\n * this.\n */\nimport {getDistance} from './sphere.js';\nimport {applyTransform} from './extent.js';\nimport {modulo} from './math.js';\nimport {toEPSG4326, fromEPSG4326, PROJECTIONS as EPSG3857_PROJECTIONS} from './proj/epsg3857.js';\nimport {PROJECTIONS as EPSG4326_PROJECTIONS} from './proj/epsg4326.js';\nimport Projection from './proj/Projection.js';\nimport Units, {METERS_PER_UNIT} from './proj/Units.js';\nimport * as projections from './proj/projections.js';\nimport {add as addTransformFunc, clear as clearTransformFuncs, get as getTransformFunc} from './proj/transforms.js';\n\n\n/**\n * A projection as {@link module:ol/proj/Projection}, SRS identifier\n * string or undefined.\n * @typedef {module:ol/proj/Projection|string|undefined} ProjectionLike\n * @api\n */\n\n\n/**\n * A transform function accepts an array of input coordinate values, an optional\n * output array, and an optional dimension (default should be 2). The function\n * transforms the input coordinate values, populates the output array, and\n * returns the output array.\n *\n * @typedef {function(Array.<number>, Array.<number>=, number=): Array.<number>} TransformFunction\n * @api\n */\n\n\nexport {METERS_PER_UNIT};\n\n\n/**\n * @param {Array.<number>} input Input coordinate array.\n * @param {Array.<number>=} opt_output Output array of coordinate values.\n * @param {number=} opt_dimension Dimension.\n * @return {Array.<number>} Output coordinate array (new array, same coordinate\n * values).\n */\nexport function cloneTransform(input, opt_output, opt_dimension) {\n let output;\n if (opt_output !== undefined) {\n for (let i = 0, ii = input.length; i < ii; ++i) {\n opt_output[i] = input[i];\n }\n output = opt_output;\n } else {\n output = input.slice();\n }\n return output;\n}\n\n\n/**\n * @param {Array.<number>} input Input coordinate array.\n * @param {Array.<number>=} opt_output Output array of coordinate values.\n * @param {number=} opt_dimension Dimension.\n * @return {Array.<number>} Input coordinate array (same array as input).\n */\nexport function identityTransform(input, opt_output, opt_dimension) {\n if (opt_output !== undefined && input !== opt_output) {\n for (let i = 0, ii = input.length; i < ii; ++i) {\n opt_output[i] = input[i];\n }\n input = opt_output;\n }\n return input;\n}\n\n\n/**\n * Add a Projection object to the list of supported projections that can be\n * looked up by their code.\n *\n * @param {module:ol/proj/Projection} projection Projection instance.\n * @api\n */\nexport function addProjection(projection) {\n projections.add(projection.getCode(), projection);\n addTransformFunc(projection, projection, cloneTransform);\n}\n\n\n/**\n * @param {Array.<module:ol/proj/Projection>} projections Projections.\n */\nexport function addProjections(projections) {\n projections.forEach(addProjection);\n}\n\n\n/**\n * Fetches a Projection object for the code specified.\n *\n * @param {module:ol/proj~ProjectionLike} projectionLike Either a code string which is\n * a combination of authority and identifier such as \"EPSG:4326\", or an\n * existing projection object, or undefined.\n * @return {module:ol/proj/Projection} Projection object, or null if not in list.\n * @api\n */\nexport function get(projectionLike) {\n let projection = null;\n if (projectionLike instanceof Projection) {\n projection = projectionLike;\n } else if (typeof projectionLike === 'string') {\n const code = projectionLike;\n projection = projections.get(code);\n }\n return projection;\n}\n\n\n/**\n * Get the resolution of the point in degrees or distance units.\n * For projections with degrees as the unit this will simply return the\n * provided resolution. For other projections the point resolution is\n * by default estimated by transforming the 'point' pixel to EPSG:4326,\n * measuring its width and height on the normal sphere,\n * and taking the average of the width and height.\n * A custom function can be provided for a specific projection, either\n * by setting the `getPointResolution` option in the\n * {@link module:ol/proj/Projection~Projection} constructor or by using\n * {@link module:ol/proj/Projection~Projection#setGetPointResolution} to change an existing\n * projection object.\n * @param {module:ol/proj~ProjectionLike} projection The projection.\n * @param {number} resolution Nominal resolution in projection units.\n * @param {module:ol/coordinate~Coordinate} point Point to find adjusted resolution at.\n * @param {module:ol/proj/Units=} opt_units Units to get the point resolution in.\n * Default is the projection's units.\n * @return {number} Point resolution.\n * @api\n */\nexport function getPointResolution(projection, resolution, point, opt_units) {\n projection = get(projection);\n let pointResolution;\n const getter = projection.getPointResolutionFunc();\n if (getter) {\n pointResolution = getter(resolution, point);\n } else {\n const units = projection.getUnits();\n if (units == Units.DEGREES && !opt_units || opt_units == Units.DEGREES) {\n pointResolution = resolution;\n } else {\n // Estimate point resolution by transforming the center pixel to EPSG:4326,\n // measuring its width and height on the normal sphere, and taking the\n // average of the width and height.\n const toEPSG4326 = getTransformFromProjections(projection, get('EPSG:4326'));\n let vertices = [\n point[0] - resolution / 2, point[1],\n point[0] + resolution / 2, point[1],\n point[0], point[1] - resolution / 2,\n point[0], point[1] + resolution / 2\n ];\n vertices = toEPSG4326(vertices, vertices, 2);\n const width = getDistance(vertices.slice(0, 2), vertices.slice(2, 4));\n const height = getDistance(vertices.slice(4, 6), vertices.slice(6, 8));\n pointResolution = (width + height) / 2;\n const metersPerUnit = opt_units ?\n METERS_PER_UNIT[opt_units] :\n projection.getMetersPerUnit();\n if (metersPerUnit !== undefined) {\n pointResolution /= metersPerUnit;\n }\n }\n }\n return pointResolution;\n}\n\n\n/**\n * Registers transformation functions that don't alter coordinates. Those allow\n * to transform between projections with equal meaning.\n *\n * @param {Array.<module:ol/proj/Projection>} projections Projections.\n * @api\n */\nexport function addEquivalentProjections(projections) {\n addProjections(projections);\n projections.forEach(function(source) {\n projections.forEach(function(destination) {\n if (source !== destination) {\n addTransformFunc(source, destination, cloneTransform);\n }\n });\n });\n}\n\n\n/**\n * Registers transformation functions to convert coordinates in any projection\n * in projection1 to any projection in projection2.\n *\n * @param {Array.<module:ol/proj/Projection>} projections1 Projections with equal\n * meaning.\n * @param {Array.<module:ol/proj/Projection>} projections2 Projections with equal\n * meaning.\n * @param {module:ol/proj~TransformFunction} forwardTransform Transformation from any\n * projection in projection1 to any projection in projection2.\n * @param {module:ol/proj~TransformFunction} inverseTransform Transform from any projection\n * in projection2 to any projection in projection1..\n */\nexport function addEquivalentTransforms(projections1, projections2, forwardTransform, inverseTransform) {\n projections1.forEach(function(projection1) {\n projections2.forEach(function(projection2) {\n addTransformFunc(projection1, projection2, forwardTransform);\n addTransformFunc(projection2, projection1, inverseTransform);\n });\n });\n}\n\n\n/**\n * Clear all cached projections and transforms.\n */\nexport function clearAllProjections() {\n projections.clear();\n clearTransformFuncs();\n}\n\n\n/**\n * @param {module:ol/proj/Projection|string|undefined} projection Projection.\n * @param {string} defaultCode Default code.\n * @return {module:ol/proj/Projection} Projection.\n */\nexport function createProjection(projection, defaultCode) {\n if (!projection) {\n return get(defaultCode);\n } else if (typeof projection === 'string') {\n return get(projection);\n } else {\n return (\n /** @type {module:ol/proj/Projection} */ (projection)\n );\n }\n}\n\n\n/**\n * Creates a {@link module:ol/proj~TransformFunction} from a simple 2D coordinate transform\n * function.\n * @param {function(module:ol/coordinate~Coordinate): module:ol/coordinate~Coordinate} coordTransform Coordinate\n * transform.\n * @return {module:ol/proj~TransformFunction} Transform function.\n */\nexport function createTransformFromCoordinateTransform(coordTransform) {\n return (\n /**\n * @param {Array.<number>} input Input.\n * @param {Array.<number>=} opt_output Output.\n * @param {number=} opt_dimension Dimension.\n * @return {Array.<number>} Output.\n */\n function(input, opt_output, opt_dimension) {\n const length = input.length;\n const dimension = opt_dimension !== undefined ? opt_dimension : 2;\n const output = opt_output !== undefined ? opt_output : new Array(length);\n for (let i = 0; i < length; i += dimension) {\n const point = coordTransform([input[i], input[i + 1]]);\n output[i] = point[0];\n output[i + 1] = point[1];\n for (let j = dimension - 1; j >= 2; --j) {\n output[i + j] = input[i + j];\n }\n }\n return output;\n });\n}\n\n\n/**\n * Registers coordinate transform functions to convert coordinates between the\n * source projection and the destination projection.\n * The forward and inverse functions convert coordinate pairs; this function\n * converts these into the functions used internally which also handle\n * extents and coordinate arrays.\n *\n * @param {module:ol/proj~ProjectionLike} source Source projection.\n * @param {module:ol/proj~ProjectionLike} destination Destination projection.\n * @param {function(module:ol/coordinate~Coordinate): module:ol/coordinate~Coordinate} forward The forward transform\n * function (that is, from the source projection to the destination\n * projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n * the transformed {@link module:ol/coordinate~Coordinate}.\n * @param {function(module:ol/coordinate~Coordinate): module:ol/coordinate~Coordinate} inverse The inverse transform\n * function (that is, from the destination projection to the source\n * projection) that takes a {@link module:ol/coordinate~Coordinate} as argument and returns\n * the transformed {@link module:ol/coordinate~Coordinate}.\n * @api\n */\nexport function addCoordinateTransforms(source, destination, forward, inverse) {\n const sourceProj = get(source);\n const destProj = get(destination);\n addTransformFunc(sourceProj, destProj, createTransformFromCoordinateTransform(forward));\n addTransformFunc(destProj, sourceProj, createTransformFromCoordinateTransform(inverse));\n}\n\n\n/**\n * Transforms a coordinate from longitude/latitude to a different projection.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate as longitude and latitude, i.e.\n * an array with longitude as 1st and latitude as 2nd element.\n * @param {module:ol/proj~ProjectionLike=} opt_projection Target projection. The\n * default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {module:ol/coordinate~Coordinate} Coordinate projected to the target projection.\n * @api\n */\nexport function fromLonLat(coordinate, opt_projection) {\n return transform(coordinate, 'EPSG:4326',\n opt_projection !== undefined ? opt_projection : 'EPSG:3857');\n}\n\n\n/**\n * Transforms a coordinate to longitude/latitude.\n * @param {module:ol/coordinate~Coordinate} coordinate Projected coordinate.\n * @param {module:ol/proj~ProjectionLike=} opt_projection Projection of the coordinate.\n * The default is Web Mercator, i.e. 'EPSG:3857'.\n * @return {module:ol/coordinate~Coordinate} Coordinate as longitude and latitude, i.e. an array\n * with longitude as 1st and latitude as 2nd element.\n * @api\n */\nexport function toLonLat(coordinate, opt_projection) {\n const lonLat = transform(coordinate,\n opt_projection !== undefined ? opt_projection : 'EPSG:3857', 'EPSG:4326');\n const lon = lonLat[0];\n if (lon < -180 || lon > 180) {\n lonLat[0] = modulo(lon + 180, 360) - 180;\n }\n return lonLat;\n}\n\n\n/**\n * Checks if two projections are the same, that is every coordinate in one\n * projection does represent the same geographic point as the same coordinate in\n * the other projection.\n *\n * @param {module:ol/proj/Projection} projection1 Projection 1.\n * @param {module:ol/proj/Projection} projection2 Projection 2.\n * @return {boolean} Equivalent.\n * @api\n */\nexport function equivalent(projection1, projection2) {\n if (projection1 === projection2) {\n return true;\n }\n const equalUnits = projection1.getUnits() === projection2.getUnits();\n if (projection1.getCode() === projection2.getCode()) {\n return equalUnits;\n } else {\n const transformFunc = getTransformFromProjections(projection1, projection2);\n return transformFunc === cloneTransform && equalUnits;\n }\n}\n\n\n/**\n * Searches in the list of transform functions for the function for converting\n * coordinates from the source projection to the destination projection.\n *\n * @param {module:ol/proj/Projection} sourceProjection Source Projection object.\n * @param {module:ol/proj/Projection} destinationProjection Destination Projection\n * object.\n * @return {module:ol/proj~TransformFunction} Transform function.\n */\nexport function getTransformFromProjections(sourceProjection, destinationProjection) {\n const sourceCode = sourceProjection.getCode();\n const destinationCode = destinationProjection.getCode();\n let transformFunc = getTransformFunc(sourceCode, destinationCode);\n if (!transformFunc) {\n transformFunc = identityTransform;\n }\n return transformFunc;\n}\n\n\n/**\n * Given the projection-like objects, searches for a transformation\n * function to convert a coordinates array from the source projection to the\n * destination projection.\n *\n * @param {module:ol/proj~ProjectionLike} source Source.\n * @param {module:ol/proj~ProjectionLike} destination Destination.\n * @return {module:ol/proj~TransformFunction} Transform function.\n * @api\n */\nexport function getTransform(source, destination) {\n const sourceProjection = get(source);\n const destinationProjection = get(destination);\n return getTransformFromProjections(sourceProjection, destinationProjection);\n}\n\n\n/**\n * Transforms a coordinate from source projection to destination projection.\n * This returns a new coordinate (and does not modify the original).\n *\n * See {@link module:ol/proj~transformExtent} for extent transformation.\n * See the transform method of {@link module:ol/geom/Geometry~Geometry} and its\n * subclasses for geometry transforms.\n *\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {module:ol/proj~ProjectionLike} source Source projection-like.\n * @param {module:ol/proj~ProjectionLike} destination Destination projection-like.\n * @return {module:ol/coordinate~Coordinate} Coordinate.\n * @api\n */\nexport function transform(coordinate, source, destination) {\n const transformFunc = getTransform(source, destination);\n return transformFunc(coordinate, undefined, coordinate.length);\n}\n\n\n/**\n * Transforms an extent from source projection to destination projection. This\n * returns a new extent (and does not modify the original).\n *\n * @param {module:ol/extent~Extent} extent The extent to transform.\n * @param {module:ol/proj~ProjectionLike} source Source projection-like.\n * @param {module:ol/proj~ProjectionLike} destination Destination projection-like.\n * @return {module:ol/extent~Extent} The transformed extent.\n * @api\n */\nexport function transformExtent(extent, source, destination) {\n const transformFunc = getTransform(source, destination);\n return applyTransform(extent, transformFunc);\n}\n\n\n/**\n * Transforms the given point to the destination projection.\n *\n * @param {module:ol/coordinate~Coordinate} point Point.\n * @param {module:ol/proj/Projection} sourceProjection Source projection.\n * @param {module:ol/proj/Projection} destinationProjection Destination projection.\n * @return {module:ol/coordinate~Coordinate} Point.\n */\nexport function transformWithProjections(point, sourceProjection, destinationProjection) {\n const transformFunc = getTransformFromProjections(sourceProjection, destinationProjection);\n return transformFunc(point);\n}\n\n/**\n * Add transforms to and from EPSG:4326 and EPSG:3857. This function is called\n * by when this module is executed and should only need to be called again after\n * `clearAllProjections()` is called (e.g. in tests).\n */\nexport function addCommon() {\n // Add transformations that don't alter coordinates to convert within set of\n // projections with equal meaning.\n addEquivalentProjections(EPSG3857_PROJECTIONS);\n addEquivalentProjections(EPSG4326_PROJECTIONS);\n // Add transformations to convert EPSG:4326 like coordinates to EPSG:3857 like\n // coordinates and back.\n addEquivalentTransforms(EPSG4326_PROJECTIONS, EPSG3857_PROJECTIONS, fromEPSG4326, toEPSG4326);\n}\n\naddCommon();\n","/**\n * @module ol/transform\n */\nimport {assert} from './asserts.js';\n\n\n/**\n * An array representing an affine 2d transformation for use with\n * {@link module:ol/transform} functions. The array has 6 elements.\n * @typedef {!Array.<number>} Transform\n */\n\n\n/**\n * Collection of affine 2d transformation functions. The functions work on an\n * array of 6 elements. The element order is compatible with the [SVGMatrix\n * interface](https://developer.mozilla.org/en-US/docs/Web/API/SVGMatrix) and is\n * a subset (elements a to f) of a 3×3 matrix:\n * ```\n * [ a c e ]\n * [ b d f ]\n * [ 0 0 1 ]\n * ```\n */\n\n\n/**\n * @private\n * @type {module:ol/transform~Transform}\n */\nconst tmp_ = new Array(6);\n\n\n/**\n * Create an identity transform.\n * @return {!module:ol/transform~Transform} Identity transform.\n */\nexport function create() {\n return [1, 0, 0, 1, 0, 0];\n}\n\n\n/**\n * Resets the given transform to an identity transform.\n * @param {!module:ol/transform~Transform} transform Transform.\n * @return {!module:ol/transform~Transform} Transform.\n */\nexport function reset(transform) {\n return set(transform, 1, 0, 0, 1, 0, 0);\n}\n\n\n/**\n * Multiply the underlying matrices of two transforms and return the result in\n * the first transform.\n * @param {!module:ol/transform~Transform} transform1 Transform parameters of matrix 1.\n * @param {!module:ol/transform~Transform} transform2 Transform parameters of matrix 2.\n * @return {!module:ol/transform~Transform} transform1 multiplied with transform2.\n */\nexport function multiply(transform1, transform2) {\n const a1 = transform1[0];\n const b1 = transform1[1];\n const c1 = transform1[2];\n const d1 = transform1[3];\n const e1 = transform1[4];\n const f1 = transform1[5];\n const a2 = transform2[0];\n const b2 = transform2[1];\n const c2 = transform2[2];\n const d2 = transform2[3];\n const e2 = transform2[4];\n const f2 = transform2[5];\n\n transform1[0] = a1 * a2 + c1 * b2;\n transform1[1] = b1 * a2 + d1 * b2;\n transform1[2] = a1 * c2 + c1 * d2;\n transform1[3] = b1 * c2 + d1 * d2;\n transform1[4] = a1 * e2 + c1 * f2 + e1;\n transform1[5] = b1 * e2 + d1 * f2 + f1;\n\n return transform1;\n}\n\n/**\n * Set the transform components a-f on a given transform.\n * @param {!module:ol/transform~Transform} transform Transform.\n * @param {number} a The a component of the transform.\n * @param {number} b The b component of the transform.\n * @param {number} c The c component of the transform.\n * @param {number} d The d component of the transform.\n * @param {number} e The e component of the transform.\n * @param {number} f The f component of the transform.\n * @return {!module:ol/transform~Transform} Matrix with transform applied.\n */\nexport function set(transform, a, b, c, d, e, f) {\n transform[0] = a;\n transform[1] = b;\n transform[2] = c;\n transform[3] = d;\n transform[4] = e;\n transform[5] = f;\n return transform;\n}\n\n\n/**\n * Set transform on one matrix from another matrix.\n * @param {!module:ol/transform~Transform} transform1 Matrix to set transform to.\n * @param {!module:ol/transform~Transform} transform2 Matrix to set transform from.\n * @return {!module:ol/transform~Transform} transform1 with transform from transform2 applied.\n */\nexport function setFromArray(transform1, transform2) {\n transform1[0] = transform2[0];\n transform1[1] = transform2[1];\n transform1[2] = transform2[2];\n transform1[3] = transform2[3];\n transform1[4] = transform2[4];\n transform1[5] = transform2[5];\n return transform1;\n}\n\n\n/**\n * Transforms the given coordinate with the given transform returning the\n * resulting, transformed coordinate. The coordinate will be modified in-place.\n *\n * @param {module:ol/transform~Transform} transform The transformation.\n * @param {module:ol/coordinate~Coordinate|module:ol~Pixel} coordinate The coordinate to transform.\n * @return {module:ol/coordinate~Coordinate|module:ol~Pixel} return coordinate so that operations can be\n * chained together.\n */\nexport function apply(transform, coordinate) {\n const x = coordinate[0];\n const y = coordinate[1];\n coordinate[0] = transform[0] * x + transform[2] * y + transform[4];\n coordinate[1] = transform[1] * x + transform[3] * y + transform[5];\n return coordinate;\n}\n\n\n/**\n * Applies rotation to the given transform.\n * @param {!module:ol/transform~Transform} transform Transform.\n * @param {number} angle Angle in radians.\n * @return {!module:ol/transform~Transform} The rotated transform.\n */\nexport function rotate(transform, angle) {\n const cos = Math.cos(angle);\n const sin = Math.sin(angle);\n return multiply(transform, set(tmp_, cos, sin, -sin, cos, 0, 0));\n}\n\n\n/**\n * Applies scale to a given transform.\n * @param {!module:ol/transform~Transform} transform Transform.\n * @param {number} x Scale factor x.\n * @param {number} y Scale factor y.\n * @return {!module:ol/transform~Transform} The scaled transform.\n */\nexport function scale(transform, x, y) {\n return multiply(transform, set(tmp_, x, 0, 0, y, 0, 0));\n}\n\n\n/**\n * Applies translation to the given transform.\n * @param {!module:ol/transform~Transform} transform Transform.\n * @param {number} dx Translation x.\n * @param {number} dy Translation y.\n * @return {!module:ol/transform~Transform} The translated transform.\n */\nexport function translate(transform, dx, dy) {\n return multiply(transform, set(tmp_, 1, 0, 0, 1, dx, dy));\n}\n\n\n/**\n * Creates a composite transform given an initial translation, scale, rotation, and\n * final translation (in that order only, not commutative).\n * @param {!module:ol/transform~Transform} transform The transform (will be modified in place).\n * @param {number} dx1 Initial translation x.\n * @param {number} dy1 Initial translation y.\n * @param {number} sx Scale factor x.\n * @param {number} sy Scale factor y.\n * @param {number} angle Rotation (in counter-clockwise radians).\n * @param {number} dx2 Final translation x.\n * @param {number} dy2 Final translation y.\n * @return {!module:ol/transform~Transform} The composite transform.\n */\nexport function compose(transform, dx1, dy1, sx, sy, angle, dx2, dy2) {\n const sin = Math.sin(angle);\n const cos = Math.cos(angle);\n transform[0] = sx * cos;\n transform[1] = sy * sin;\n transform[2] = -sx * sin;\n transform[3] = sy * cos;\n transform[4] = dx2 * sx * cos - dy2 * sx * sin + dx1;\n transform[5] = dx2 * sy * sin + dy2 * sy * cos + dy1;\n return transform;\n}\n\n\n/**\n * Invert the given transform.\n * @param {!module:ol/transform~Transform} transform Transform.\n * @return {!module:ol/transform~Transform} Inverse of the transform.\n */\nexport function invert(transform) {\n const det = determinant(transform);\n assert(det !== 0, 32); // Transformation matrix cannot be inverted\n\n const a = transform[0];\n const b = transform[1];\n const c = transform[2];\n const d = transform[3];\n const e = transform[4];\n const f = transform[5];\n\n transform[0] = d / det;\n transform[1] = -b / det;\n transform[2] = -c / det;\n transform[3] = a / det;\n transform[4] = (c * f - d * e) / det;\n transform[5] = -(a * f - b * e) / det;\n\n return transform;\n}\n\n\n/**\n * Returns the determinant of the given matrix.\n * @param {!module:ol/transform~Transform} mat Matrix.\n * @return {number} Determinant.\n */\nexport function determinant(mat) {\n return mat[0] * mat[3] - mat[1] * mat[2];\n}\n","/**\n * @module ol/geom/Geometry\n */\nimport {inherits} from '../util.js';\nimport BaseObject from '../Object.js';\nimport {createEmpty, getHeight, returnOrUpdate} from '../extent.js';\nimport {FALSE} from '../functions.js';\nimport {transform2D} from '../geom/flat/transform.js';\nimport {get as getProjection, getTransform} from '../proj.js';\nimport Units from '../proj/Units.js';\nimport {create as createTransform, compose as composeTransform} from '../transform.js';\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for vector geometries.\n *\n * To get notified of changes to the geometry, register a listener for the\n * generic `change` event on your geometry instance.\n *\n * @constructor\n * @abstract\n * @extends {module:ol/Object}\n * @api\n */\nconst Geometry = function() {\n\n BaseObject.call(this);\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.extent_ = createEmpty();\n\n /**\n * @private\n * @type {number}\n */\n this.extentRevision_ = -1;\n\n /**\n * @protected\n * @type {Object.<string, module:ol/geom/Geometry>}\n */\n this.simplifiedGeometryCache = {};\n\n /**\n * @protected\n * @type {number}\n */\n this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n\n /**\n * @protected\n * @type {number}\n */\n this.simplifiedGeometryRevision = 0;\n\n};\n\ninherits(Geometry, BaseObject);\n\n\n/**\n * @type {module:ol/transform~Transform}\n */\nconst tmpTransform = createTransform();\n\n\n/**\n * Make a complete copy of the geometry.\n * @abstract\n * @return {!module:ol/geom/Geometry} Clone.\n */\nGeometry.prototype.clone = function() {};\n\n\n/**\n * @abstract\n * @param {number} x X.\n * @param {number} y Y.\n * @param {module:ol/coordinate~Coordinate} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @return {number} Minimum squared distance.\n */\nGeometry.prototype.closestPointXY = function(x, y, closestPoint, minSquaredDistance) {};\n\n\n/**\n * Return the closest point of the geometry to the passed point as\n * {@link module:ol/coordinate~Coordinate coordinate}.\n * @param {module:ol/coordinate~Coordinate} point Point.\n * @param {module:ol/coordinate~Coordinate=} opt_closestPoint Closest point.\n * @return {module:ol/coordinate~Coordinate} Closest point.\n * @api\n */\nGeometry.prototype.getClosestPoint = function(point, opt_closestPoint) {\n const closestPoint = opt_closestPoint ? opt_closestPoint : [NaN, NaN];\n this.closestPointXY(point[0], point[1], closestPoint, Infinity);\n return closestPoint;\n};\n\n\n/**\n * Returns true if this geometry includes the specified coordinate. If the\n * coordinate is on the boundary of the geometry, returns false.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @return {boolean} Contains coordinate.\n * @api\n */\nGeometry.prototype.intersectsCoordinate = function(coordinate) {\n return this.containsXY(coordinate[0], coordinate[1]);\n};\n\n\n/**\n * @abstract\n * @param {module:ol/extent~Extent} extent Extent.\n * @protected\n * @return {module:ol/extent~Extent} extent Extent.\n */\nGeometry.prototype.computeExtent = function(extent) {};\n\n\n/**\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nGeometry.prototype.containsXY = FALSE;\n\n\n/**\n * Get the extent of the geometry.\n * @param {module:ol/extent~Extent=} opt_extent Extent.\n * @return {module:ol/extent~Extent} extent Extent.\n * @api\n */\nGeometry.prototype.getExtent = function(opt_extent) {\n if (this.extentRevision_ != this.getRevision()) {\n this.extent_ = this.computeExtent(this.extent_);\n this.extentRevision_ = this.getRevision();\n }\n return returnOrUpdate(this.extent_, opt_extent);\n};\n\n\n/**\n * Rotate the geometry around a given coordinate. This modifies the geometry\n * coordinates in place.\n * @abstract\n * @param {number} angle Rotation angle in radians.\n * @param {module:ol/coordinate~Coordinate} anchor The rotation center.\n * @api\n */\nGeometry.prototype.rotate = function(angle, anchor) {};\n\n\n/**\n * Scale the geometry (with an optional origin). This modifies the geometry\n * coordinates in place.\n * @abstract\n * @param {number} sx The scaling factor in the x-direction.\n * @param {number=} opt_sy The scaling factor in the y-direction (defaults to\n * sx).\n * @param {module:ol/coordinate~Coordinate=} opt_anchor The scale origin (defaults to the center\n * of the geometry extent).\n * @api\n */\nGeometry.prototype.scale = function(sx, opt_sy, opt_anchor) {};\n\n\n/**\n * Create a simplified version of this geometry. For linestrings, this uses\n * the the {@link\n * https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm\n * Douglas Peucker} algorithm. For polygons, a quantization-based\n * simplification is used to preserve topology.\n * @function\n * @param {number} tolerance The tolerance distance for simplification.\n * @return {module:ol/geom/Geometry} A new, simplified version of the original\n * geometry.\n * @api\n */\nGeometry.prototype.simplify = function(tolerance) {\n return this.getSimplifiedGeometry(tolerance * tolerance);\n};\n\n\n/**\n * Create a simplified version of this geometry using the Douglas Peucker\n * algorithm.\n * @see https://en.wikipedia.org/wiki/Ramer-Douglas-Peucker_algorithm\n * @abstract\n * @param {number} squaredTolerance Squared tolerance.\n * @return {module:ol/geom/Geometry} Simplified geometry.\n */\nGeometry.prototype.getSimplifiedGeometry = function(squaredTolerance) {};\n\n\n/**\n * Get the type of this geometry.\n * @abstract\n * @return {module:ol/geom/GeometryType} Geometry type.\n */\nGeometry.prototype.getType = function() {};\n\n\n/**\n * Apply a transform function to each coordinate of the geometry.\n * The geometry is modified in place.\n * If you do not want the geometry modified in place, first `clone()` it and\n * then use this function on the clone.\n * @abstract\n * @param {module:ol/proj~TransformFunction} transformFn Transform.\n */\nGeometry.prototype.applyTransform = function(transformFn) {};\n\n\n/**\n * Test if the geometry and the passed extent intersect.\n * @abstract\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {boolean} `true` if the geometry and the extent intersect.\n */\nGeometry.prototype.intersectsExtent = function(extent) {};\n\n\n/**\n * Translate the geometry. This modifies the geometry coordinates in place. If\n * instead you want a new geometry, first `clone()` this geometry.\n * @abstract\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n */\nGeometry.prototype.translate = function(deltaX, deltaY) {};\n\n\n/**\n * Transform each coordinate of the geometry from one coordinate reference\n * system to another. The geometry is modified in place.\n * For example, a line will be transformed to a line and a circle to a circle.\n * If you do not want the geometry modified in place, first `clone()` it and\n * then use this function on the clone.\n *\n * @param {module:ol/proj~ProjectionLike} source The current projection. Can be a\n * string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @param {module:ol/proj~ProjectionLike} destination The desired projection. Can be a\n * string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @return {module:ol/geom/Geometry} This geometry. Note that original geometry is\n * modified in place.\n * @api\n */\nGeometry.prototype.transform = function(source, destination) {\n source = getProjection(source);\n const transformFn = source.getUnits() == Units.TILE_PIXELS ?\n function(inCoordinates, outCoordinates, stride) {\n const pixelExtent = source.getExtent();\n const projectedExtent = source.getWorldExtent();\n const scale = getHeight(projectedExtent) / getHeight(pixelExtent);\n composeTransform(tmpTransform,\n projectedExtent[0], projectedExtent[3],\n scale, -scale, 0,\n 0, 0);\n transform2D(inCoordinates, 0, inCoordinates.length, stride,\n tmpTransform, outCoordinates);\n return getTransform(source, destination)(inCoordinates, outCoordinates, stride);\n } :\n getTransform(source, destination);\n this.applyTransform(transformFn);\n return this;\n};\nexport default Geometry;\n","/**\n * @module ol/color\n */\nimport {assert} from './asserts.js';\nimport {clamp} from './math.js';\n\n\n/**\n * A color represented as a short array [red, green, blue, alpha].\n * red, green, and blue should be integers in the range 0..255 inclusive.\n * alpha should be a float in the range 0..1 inclusive. If no alpha value is\n * given then `1` will be used.\n * @typedef {Array.<number>} Color\n * @api\n */\n\n\n/**\n * This RegExp matches # followed by 3, 4, 6, or 8 hex digits.\n * @const\n * @type {RegExp}\n * @private\n */\nconst HEX_COLOR_RE_ = /^#([a-f0-9]{3}|[a-f0-9]{4}(?:[a-f0-9]{2}){0,2})$/i;\n\n\n/**\n * Regular expression for matching potential named color style strings.\n * @const\n * @type {RegExp}\n * @private\n */\nconst NAMED_COLOR_RE_ = /^([a-z]*)$/i;\n\n\n/**\n * Return the color as an rgba string.\n * @param {module:ol/color~Color|string} color Color.\n * @return {string} Rgba string.\n * @api\n */\nexport function asString(color) {\n if (typeof color === 'string') {\n return color;\n } else {\n return toString(color);\n }\n}\n\n/**\n * Return named color as an rgba string.\n * @param {string} color Named color.\n * @return {string} Rgb string.\n */\nfunction fromNamed(color) {\n const el = document.createElement('div');\n el.style.color = color;\n if (el.style.color !== '') {\n document.body.appendChild(el);\n const rgb = getComputedStyle(el).color;\n document.body.removeChild(el);\n return rgb;\n } else {\n return '';\n }\n}\n\n\n/**\n * @param {string} s String.\n * @return {module:ol/color~Color} Color.\n */\nexport const fromString = (\n function() {\n\n // We maintain a small cache of parsed strings. To provide cheap LRU-like\n // semantics, whenever the cache grows too large we simply delete an\n // arbitrary 25% of the entries.\n\n /**\n * @const\n * @type {number}\n */\n const MAX_CACHE_SIZE = 1024;\n\n /**\n * @type {Object.<string, module:ol/color~Color>}\n */\n const cache = {};\n\n /**\n * @type {number}\n */\n let cacheSize = 0;\n\n return (\n /**\n * @param {string} s String.\n * @return {module:ol/color~Color} Color.\n */\n function(s) {\n let color;\n if (cache.hasOwnProperty(s)) {\n color = cache[s];\n } else {\n if (cacheSize >= MAX_CACHE_SIZE) {\n let i = 0;\n for (const key in cache) {\n if ((i++ & 3) === 0) {\n delete cache[key];\n --cacheSize;\n }\n }\n }\n color = fromStringInternal_(s);\n cache[s] = color;\n ++cacheSize;\n }\n return color;\n }\n );\n\n })();\n\n/**\n * Return the color as an array. This function maintains a cache of calculated\n * arrays which means the result should not be modified.\n * @param {module:ol/color~Color|string} color Color.\n * @return {module:ol/color~Color} Color.\n * @api\n */\nexport function asArray(color) {\n if (Array.isArray(color)) {\n return color;\n } else {\n return fromString(/** @type {string} */ (color));\n }\n}\n\n/**\n * @param {string} s String.\n * @private\n * @return {module:ol/color~Color} Color.\n */\nfunction fromStringInternal_(s) {\n let r, g, b, a, color;\n\n if (NAMED_COLOR_RE_.exec(s)) {\n s = fromNamed(s);\n }\n\n if (HEX_COLOR_RE_.exec(s)) { // hex\n const n = s.length - 1; // number of hex digits\n let d; // number of digits per channel\n if (n <= 4) {\n d = 1;\n } else {\n d = 2;\n }\n const hasAlpha = n === 4 || n === 8;\n r = parseInt(s.substr(1 + 0 * d, d), 16);\n g = parseInt(s.substr(1 + 1 * d, d), 16);\n b = parseInt(s.substr(1 + 2 * d, d), 16);\n if (hasAlpha) {\n a = parseInt(s.substr(1 + 3 * d, d), 16);\n } else {\n a = 255;\n }\n if (d == 1) {\n r = (r << 4) + r;\n g = (g << 4) + g;\n b = (b << 4) + b;\n if (hasAlpha) {\n a = (a << 4) + a;\n }\n }\n color = [r, g, b, a / 255];\n } else if (s.indexOf('rgba(') == 0) { // rgba()\n color = s.slice(5, -1).split(',').map(Number);\n normalize(color);\n } else if (s.indexOf('rgb(') == 0) { // rgb()\n color = s.slice(4, -1).split(',').map(Number);\n color.push(1);\n normalize(color);\n } else {\n assert(false, 14); // Invalid color\n }\n return (\n /** @type {module:ol/color~Color} */ (color)\n );\n}\n\n\n/**\n * TODO this function is only used in the test, we probably shouldn't export it\n * @param {module:ol/color~Color} color Color.\n * @return {module:ol/color~Color} Clamped color.\n */\nexport function normalize(color) {\n color[0] = clamp((color[0] + 0.5) | 0, 0, 255);\n color[1] = clamp((color[1] + 0.5) | 0, 0, 255);\n color[2] = clamp((color[2] + 0.5) | 0, 0, 255);\n color[3] = clamp(color[3], 0, 1);\n return color;\n}\n\n\n/**\n * @param {module:ol/color~Color} color Color.\n * @return {string} String.\n */\nexport function toString(color) {\n let r = color[0];\n if (r != (r | 0)) {\n r = (r + 0.5) | 0;\n }\n let g = color[1];\n if (g != (g | 0)) {\n g = (g + 0.5) | 0;\n }\n let b = color[2];\n if (b != (b | 0)) {\n b = (b + 0.5) | 0;\n }\n const a = color[3] === undefined ? 1 : color[3];\n return 'rgba(' + r + ',' + g + ',' + b + ',' + a + ')';\n}\n","/**\n * @module ol/colorlike\n */\nimport {toString} from './color.js';\n\n\n/**\n * A type accepted by CanvasRenderingContext2D.fillStyle\n * or CanvasRenderingContext2D.strokeStyle.\n * Represents a color, pattern, or gradient. The origin for patterns and\n * gradients as fill style is an increment of 512 css pixels from map coordinate\n * `[0, 0]`. For seamless repeat patterns, width and height of the pattern image\n * must be a factor of two (2, 4, 8, ..., 512).\n *\n * @typedef {string|CanvasPattern|CanvasGradient} ColorLike\n * @api\n */\n\n\n/**\n * @param {module:ol/color~Color|module:ol/colorlike~ColorLike} color Color.\n * @return {module:ol/colorlike~ColorLike} The color as an {@link ol/colorlike~ColorLike}.\n * @api\n */\nexport function asColorLike(color) {\n if (isColorLike(color)) {\n return /** @type {string|CanvasPattern|CanvasGradient} */ (color);\n } else {\n return toString(/** @type {module:ol/color~Color} */ (color));\n }\n}\n\n\n/**\n * @param {?} color The value that is potentially an {@link ol/colorlike~ColorLike}.\n * @return {boolean} The color is an {@link ol/colorlike~ColorLike}.\n */\nexport function isColorLike(color) {\n return (\n typeof color === 'string' ||\n color instanceof CanvasPattern ||\n color instanceof CanvasGradient\n );\n}\n","/**\n * @module ol/dom\n */\n\n\n/**\n * Create an html canvas element and returns its 2d context.\n * @param {number=} opt_width Canvas width.\n * @param {number=} opt_height Canvas height.\n * @return {CanvasRenderingContext2D} The context.\n */\nexport function createCanvasContext2D(opt_width, opt_height) {\n const canvas = /** @type {HTMLCanvasElement} */ (document.createElement('CANVAS'));\n if (opt_width) {\n canvas.width = opt_width;\n }\n if (opt_height) {\n canvas.height = opt_height;\n }\n return /** @type {CanvasRenderingContext2D} */ (canvas.getContext('2d'));\n}\n\n\n/**\n * Get the current computed width for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerWidth(true)`.\n * @param {!Element} element Element.\n * @return {number} The width.\n */\nexport function outerWidth(element) {\n let width = element.offsetWidth;\n const style = getComputedStyle(element);\n width += parseInt(style.marginLeft, 10) + parseInt(style.marginRight, 10);\n\n return width;\n}\n\n\n/**\n * Get the current computed height for the given element including margin,\n * padding and border.\n * Equivalent to jQuery's `$(el).outerHeight(true)`.\n * @param {!Element} element Element.\n * @return {number} The height.\n */\nexport function outerHeight(element) {\n let height = element.offsetHeight;\n const style = getComputedStyle(element);\n height += parseInt(style.marginTop, 10) + parseInt(style.marginBottom, 10);\n\n return height;\n}\n\n/**\n * @param {Node} newNode Node to replace old node\n * @param {Node} oldNode The node to be replaced\n */\nexport function replaceNode(newNode, oldNode) {\n const parent = oldNode.parentNode;\n if (parent) {\n parent.replaceChild(newNode, oldNode);\n }\n}\n\n/**\n * @param {Node} node The node to remove.\n * @returns {Node} The node that was removed or null.\n */\nexport function removeNode(node) {\n return node && node.parentNode ? node.parentNode.removeChild(node) : null;\n}\n\n/**\n * @param {Node} node The node to remove the children from.\n */\nexport function removeChildren(node) {\n while (node.lastChild) {\n node.removeChild(node.lastChild);\n }\n}\n","/**\n * @module ol/webgl\n */\n\n\n/**\n * Constants taken from goog.webgl\n */\n\n\n/**\n * @const\n * @type {number}\n */\nexport const ONE = 1;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const SRC_ALPHA = 0x0302;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const COLOR_ATTACHMENT0 = 0x8CE0;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const COLOR_BUFFER_BIT = 0x00004000;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const TRIANGLES = 0x0004;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const TRIANGLE_STRIP = 0x0005;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const ONE_MINUS_SRC_ALPHA = 0x0303;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const ARRAY_BUFFER = 0x8892;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const ELEMENT_ARRAY_BUFFER = 0x8893;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const STREAM_DRAW = 0x88E0;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const STATIC_DRAW = 0x88E4;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const DYNAMIC_DRAW = 0x88E8;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const CULL_FACE = 0x0B44;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const BLEND = 0x0BE2;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const STENCIL_TEST = 0x0B90;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const DEPTH_TEST = 0x0B71;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const SCISSOR_TEST = 0x0C11;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const UNSIGNED_BYTE = 0x1401;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const UNSIGNED_SHORT = 0x1403;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const UNSIGNED_INT = 0x1405;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const FLOAT = 0x1406;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const RGBA = 0x1908;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const FRAGMENT_SHADER = 0x8B30;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const VERTEX_SHADER = 0x8B31;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const LINK_STATUS = 0x8B82;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const LINEAR = 0x2601;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const TEXTURE_MAG_FILTER = 0x2800;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const TEXTURE_MIN_FILTER = 0x2801;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const TEXTURE_WRAP_S = 0x2802;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const TEXTURE_WRAP_T = 0x2803;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const TEXTURE_2D = 0x0DE1;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const TEXTURE0 = 0x84C0;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const CLAMP_TO_EDGE = 0x812F;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const COMPILE_STATUS = 0x8B81;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const FRAMEBUFFER = 0x8D40;\n\n\n/** end of goog.webgl constants\n */\n\n\n/**\n * @const\n * @type {Array.<string>}\n */\nconst CONTEXT_IDS = [\n 'experimental-webgl',\n 'webgl',\n 'webkit-3d',\n 'moz-webgl'\n];\n\n\n/**\n * @param {HTMLCanvasElement} canvas Canvas.\n * @param {Object=} opt_attributes Attributes.\n * @return {WebGLRenderingContext} WebGL rendering context.\n */\nexport function getContext(canvas, opt_attributes) {\n const ii = CONTEXT_IDS.length;\n for (let i = 0; i < ii; ++i) {\n try {\n const context = canvas.getContext(CONTEXT_IDS[i], opt_attributes);\n if (context) {\n return /** @type {!WebGLRenderingContext} */ (context);\n }\n } catch (e) {\n // pass\n }\n }\n return null;\n}\n\n\n/**\n * Include debuggable shader sources. Default is `true`. This should be set to\n * `false` for production builds.\n * @type {boolean}\n */\nexport const DEBUG = true;\n\n\n/**\n * The maximum supported WebGL texture size in pixels. If WebGL is not\n * supported, the value is set to `undefined`.\n * @type {number|undefined}\n */\nlet MAX_TEXTURE_SIZE; // value is set below\n\n\n/**\n * List of supported WebGL extensions.\n * @type {Array.<string>}\n */\nlet EXTENSIONS; // value is set below\n\n\n/**\n * True if both OpenLayers and browser support WebGL.\n * @const ol/has.WEBGL\n * @type {boolean}\n * @api\n */\nlet HAS = false;\n\n//TODO Remove side effects\nif (typeof window !== 'undefined' && 'WebGLRenderingContext' in window) {\n try {\n const canvas = /** @type {HTMLCanvasElement} */ (document.createElement('CANVAS'));\n const gl = getContext(canvas, {failIfMajorPerformanceCaveat: true});\n if (gl) {\n HAS = true;\n MAX_TEXTURE_SIZE = /** @type {number} */ (gl.getParameter(gl.MAX_TEXTURE_SIZE));\n EXTENSIONS = gl.getSupportedExtensions();\n }\n } catch (e) {\n // pass\n }\n}\n\nexport {HAS, MAX_TEXTURE_SIZE, EXTENSIONS};\n","/**\n * @module ol/has\n */\n\nconst ua = typeof navigator !== 'undefined' ?\n navigator.userAgent.toLowerCase() : '';\n\n/**\n * User agent string says we are dealing with Firefox as browser.\n * @type {boolean}\n */\nexport const FIREFOX = ua.indexOf('firefox') !== -1;\n\n/**\n * User agent string says we are dealing with Safari as browser.\n * @type {boolean}\n */\nexport const SAFARI = ua.indexOf('safari') !== -1 && ua.indexOf('chrom') == -1;\n\n/**\n * User agent string says we are dealing with a WebKit engine.\n * @type {boolean}\n */\nexport const WEBKIT = ua.indexOf('webkit') !== -1 && ua.indexOf('edge') == -1;\n\n/**\n * User agent string says we are dealing with a Mac as platform.\n * @type {boolean}\n */\nexport const MAC = ua.indexOf('macintosh') !== -1;\n\n\n/**\n * The ratio between physical pixels and device-independent pixels\n * (dips) on the device (`window.devicePixelRatio`).\n * @const\n * @type {number}\n * @api\n */\nexport const DEVICE_PIXEL_RATIO = window.devicePixelRatio || 1;\n\n\n/**\n * True if the browser's Canvas implementation implements {get,set}LineDash.\n * @type {boolean}\n */\nexport const CANVAS_LINE_DASH = function() {\n let has = false;\n try {\n has = !!document.createElement('CANVAS').getContext('2d').setLineDash;\n } catch (e) {\n // pass\n }\n return has;\n}();\n\n\n/**\n * Is HTML5 geolocation supported in the current browser?\n * @const\n * @type {boolean}\n * @api\n */\nexport const GEOLOCATION = 'geolocation' in navigator;\n\n\n/**\n * True if browser supports touch events.\n * @const\n * @type {boolean}\n * @api\n */\nexport const TOUCH = 'ontouchstart' in window;\n\n\n/**\n * True if browser supports pointer events.\n * @const\n * @type {boolean}\n */\nexport const POINTER = 'PointerEvent' in window;\n\n\n/**\n * True if browser supports ms pointer events (IE 10).\n * @const\n * @type {boolean}\n */\nexport const MSPOINTER = !!(navigator.msPointerEnabled);\n\n\nexport {HAS as WEBGL} from './webgl.js';\n","/**\n * @module ol/css\n */\n\n\n/**\n * The CSS class for hidden feature.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_HIDDEN = 'ol-hidden';\n\n\n/**\n * The CSS class that we'll give the DOM elements to have them selectable.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_SELECTABLE = 'ol-selectable';\n\n\n/**\n * The CSS class that we'll give the DOM elements to have them unselectable.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_UNSELECTABLE = 'ol-unselectable';\n\n\n/**\n * The CSS class for unsupported feature.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_UNSUPPORTED = 'ol-unsupported';\n\n\n/**\n * The CSS class for controls.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_CONTROL = 'ol-control';\n\n\n/**\n * The CSS class that we'll give the DOM elements that are collapsed, i.e.\n * to those elements which usually can be expanded.\n *\n * @const\n * @type {string}\n */\nexport const CLASS_COLLAPSED = 'ol-collapsed';\n\n\n/**\n * Get the list of font families from a font spec. Note that this doesn't work\n * for font families that have commas in them.\n * @param {string} The CSS font property.\n * @return {Object.<string>} The font families (or null if the input spec is invalid).\n */\nexport const getFontFamilies = (function() {\n let style;\n const cache = {};\n return function(font) {\n if (!style) {\n style = document.createElement('div').style;\n }\n if (!(font in cache)) {\n style.font = font;\n const family = style.fontFamily;\n style.font = '';\n if (!family) {\n return null;\n }\n cache[font] = family.split(/,\\s?/);\n }\n return cache[font];\n };\n})();\n","/**\n * @module ol/ImageState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n IDLE: 0,\n LOADING: 1,\n LOADED: 2,\n ERROR: 3\n};\n","/**\n * @module ol/structs/LRUCache\n */\nimport {inherits} from '../util.js';\nimport {assert} from '../asserts.js';\nimport EventTarget from '../events/EventTarget.js';\nimport EventType from '../events/EventType.js';\n\n\n/**\n * @typedef {Object} Entry\n * @property {string} key_\n * @property {Object} newer\n * @property {Object} older\n * @property {*} value_\n */\n\n\n/**\n * Implements a Least-Recently-Used cache where the keys do not conflict with\n * Object's properties (e.g. 'hasOwnProperty' is not allowed as a key). Expiring\n * items from the cache is the responsibility of the user.\n * @constructor\n * @extends {module:ol/events/EventTarget}\n * @fires module:ol/events/Event~Event\n * @struct\n * @template T\n * @param {number=} opt_highWaterMark High water mark.\n */\nconst LRUCache = function(opt_highWaterMark) {\n\n EventTarget.call(this);\n\n /**\n * @type {number}\n */\n this.highWaterMark = opt_highWaterMark !== undefined ? opt_highWaterMark : 2048;\n\n /**\n * @private\n * @type {number}\n */\n this.count_ = 0;\n\n /**\n * @private\n * @type {!Object.<string, module:ol/structs/LRUCache~Entry>}\n */\n this.entries_ = {};\n\n /**\n * @private\n * @type {?module:ol/structs/LRUCache~Entry}\n */\n this.oldest_ = null;\n\n /**\n * @private\n * @type {?module:ol/structs/LRUCache~Entry}\n */\n this.newest_ = null;\n\n};\n\ninherits(LRUCache, EventTarget);\n\n\n/**\n * @return {boolean} Can expire cache.\n */\nLRUCache.prototype.canExpireCache = function() {\n return this.getCount() > this.highWaterMark;\n};\n\n\n/**\n * FIXME empty description for jsdoc\n */\nLRUCache.prototype.clear = function() {\n this.count_ = 0;\n this.entries_ = {};\n this.oldest_ = null;\n this.newest_ = null;\n this.dispatchEvent(EventType.CLEAR);\n};\n\n\n/**\n * @param {string} key Key.\n * @return {boolean} Contains key.\n */\nLRUCache.prototype.containsKey = function(key) {\n return this.entries_.hasOwnProperty(key);\n};\n\n\n/**\n * @param {function(this: S, T, string, module:ol/structs/LRUCache): ?} f The function\n * to call for every entry from the oldest to the newer. This function takes\n * 3 arguments (the entry value, the entry key and the LRUCache object).\n * The return value is ignored.\n * @param {S=} opt_this The object to use as `this` in `f`.\n * @template S\n */\nLRUCache.prototype.forEach = function(f, opt_this) {\n let entry = this.oldest_;\n while (entry) {\n f.call(opt_this, entry.value_, entry.key_, this);\n entry = entry.newer;\n }\n};\n\n\n/**\n * @param {string} key Key.\n * @return {T} Value.\n */\nLRUCache.prototype.get = function(key) {\n const entry = this.entries_[key];\n assert(entry !== undefined,\n 15); // Tried to get a value for a key that does not exist in the cache\n if (entry === this.newest_) {\n return entry.value_;\n } else if (entry === this.oldest_) {\n this.oldest_ = /** @type {module:ol/structs/LRUCache~Entry} */ (this.oldest_.newer);\n this.oldest_.older = null;\n } else {\n entry.newer.older = entry.older;\n entry.older.newer = entry.newer;\n }\n entry.newer = null;\n entry.older = this.newest_;\n this.newest_.newer = entry;\n this.newest_ = entry;\n return entry.value_;\n};\n\n\n/**\n * Remove an entry from the cache.\n * @param {string} key The entry key.\n * @return {T} The removed entry.\n */\nLRUCache.prototype.remove = function(key) {\n const entry = this.entries_[key];\n assert(entry !== undefined, 15); // Tried to get a value for a key that does not exist in the cache\n if (entry === this.newest_) {\n this.newest_ = /** @type {module:ol/structs/LRUCache~Entry} */ (entry.older);\n if (this.newest_) {\n this.newest_.newer = null;\n }\n } else if (entry === this.oldest_) {\n this.oldest_ = /** @type {module:ol/structs/LRUCache~Entry} */ (entry.newer);\n if (this.oldest_) {\n this.oldest_.older = null;\n }\n } else {\n entry.newer.older = entry.older;\n entry.older.newer = entry.newer;\n }\n delete this.entries_[key];\n --this.count_;\n return entry.value_;\n};\n\n\n/**\n * @return {number} Count.\n */\nLRUCache.prototype.getCount = function() {\n return this.count_;\n};\n\n\n/**\n * @return {Array.<string>} Keys.\n */\nLRUCache.prototype.getKeys = function() {\n const keys = new Array(this.count_);\n let i = 0;\n let entry;\n for (entry = this.newest_; entry; entry = entry.older) {\n keys[i++] = entry.key_;\n }\n return keys;\n};\n\n\n/**\n * @return {Array.<T>} Values.\n */\nLRUCache.prototype.getValues = function() {\n const values = new Array(this.count_);\n let i = 0;\n let entry;\n for (entry = this.newest_; entry; entry = entry.older) {\n values[i++] = entry.value_;\n }\n return values;\n};\n\n\n/**\n * @return {T} Last value.\n */\nLRUCache.prototype.peekLast = function() {\n return this.oldest_.value_;\n};\n\n\n/**\n * @return {string} Last key.\n */\nLRUCache.prototype.peekLastKey = function() {\n return this.oldest_.key_;\n};\n\n\n/**\n * Get the key of the newest item in the cache. Throws if the cache is empty.\n * @return {string} The newest key.\n */\nLRUCache.prototype.peekFirstKey = function() {\n return this.newest_.key_;\n};\n\n\n/**\n * @return {T} value Value.\n */\nLRUCache.prototype.pop = function() {\n const entry = this.oldest_;\n delete this.entries_[entry.key_];\n if (entry.newer) {\n entry.newer.older = null;\n }\n this.oldest_ = /** @type {module:ol/structs/LRUCache~Entry} */ (entry.newer);\n if (!this.oldest_) {\n this.newest_ = null;\n }\n --this.count_;\n return entry.value_;\n};\n\n\n/**\n * @param {string} key Key.\n * @param {T} value Value.\n */\nLRUCache.prototype.replace = function(key, value) {\n this.get(key); // update `newest_`\n this.entries_[key].value_ = value;\n};\n\n\n/**\n * @param {string} key Key.\n * @param {T} value Value.\n */\nLRUCache.prototype.set = function(key, value) {\n assert(!(key in this.entries_),\n 16); // Tried to set a value for a key that is used already\n const entry = /** @type {module:ol/structs/LRUCache~Entry} */ ({\n key_: key,\n newer: null,\n older: this.newest_,\n value_: value\n });\n if (!this.newest_) {\n this.oldest_ = entry;\n } else {\n this.newest_.newer = entry;\n }\n this.newest_ = entry;\n this.entries_[key] = entry;\n ++this.count_;\n};\n\n\n/**\n * Set a maximum number of entries for the cache.\n * @param {number} size Cache size.\n * @api\n */\nLRUCache.prototype.setSize = function(size) {\n this.highWaterMark = size;\n};\n\n\n/**\n * Prune the cache.\n */\nLRUCache.prototype.prune = function() {\n while (this.canExpireCache()) {\n this.pop();\n }\n};\nexport default LRUCache;\n","/**\n * @module ol/render/canvas\n */\nimport {getFontFamilies} from '../css.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {clear} from '../obj.js';\nimport LRUCache from '../structs/LRUCache.js';\nimport {create as createTransform} from '../transform.js';\n\n\n/**\n * @typedef {Object} FillState\n * @property {module:ol/colorlike~ColorLike} fillStyle\n */\n\n\n/**\n * @typedef {Object} FillStrokeState\n * @property {module:ol/colorlike~ColorLike} [currentFillStyle]\n * @property {module:ol/colorlike~ColorLike} [currentStrokeStyle]\n * @property {string} [currentLineCap]\n * @property {Array.<number>} currentLineDash\n * @property {number} [currentLineDashOffset]\n * @property {string} [currentLineJoin]\n * @property {number} [currentLineWidth]\n * @property {number} [currentMiterLimit]\n * @property {number} [lastStroke]\n * @property {module:ol/colorlike~ColorLike} [fillStyle]\n * @property {module:ol/colorlike~ColorLike} [strokeStyle]\n * @property {string} [lineCap]\n * @property {Array.<number>} lineDash\n * @property {number} [lineDashOffset]\n * @property {string} [lineJoin]\n * @property {number} [lineWidth]\n * @property {number} [miterLimit]\n */\n\n\n/**\n * @typedef {Object} StrokeState\n * @property {string} lineCap\n * @property {Array.<number>} lineDash\n * @property {number} lineDashOffset\n * @property {string} lineJoin\n * @property {number} lineWidth\n * @property {number} miterLimit\n * @property {module:ol/colorlike~ColorLike} strokeStyle\n */\n\n\n/**\n * @typedef {Object} TextState\n * @property {string} font\n * @property {string} [textAlign]\n * @property {string} textBaseline\n */\n\n\n/**\n * Container for decluttered replay instructions that need to be rendered or\n * omitted together, i.e. when styles render both an image and text, or for the\n * characters that form text along lines. The basic elements of this array are\n * `[minX, minY, maxX, maxY, count]`, where the first four entries are the\n * rendered extent of the group in pixel space. `count` is the number of styles\n * in the group, i.e. 2 when an image and a text are grouped, or 1 otherwise.\n * In addition to these four elements, declutter instruction arrays (i.e. the\n * arguments to {@link module:ol/render/canvas~drawImage} are appended to the array.\n * @typedef {Array.<*>} DeclutterGroup\n */\n\n\n/**\n * @const\n * @type {string}\n */\nexport const defaultFont = '10px sans-serif';\n\n\n/**\n * @const\n * @type {module:ol/color~Color}\n */\nexport const defaultFillStyle = [0, 0, 0, 1];\n\n\n/**\n * @const\n * @type {string}\n */\nexport const defaultLineCap = 'round';\n\n\n/**\n * @const\n * @type {Array.<number>}\n */\nexport const defaultLineDash = [];\n\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultLineDashOffset = 0;\n\n\n/**\n * @const\n * @type {string}\n */\nexport const defaultLineJoin = 'round';\n\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultMiterLimit = 10;\n\n\n/**\n * @const\n * @type {module:ol/color~Color}\n */\nexport const defaultStrokeStyle = [0, 0, 0, 1];\n\n\n/**\n * @const\n * @type {string}\n */\nexport const defaultTextAlign = 'center';\n\n\n/**\n * @const\n * @type {string}\n */\nexport const defaultTextBaseline = 'middle';\n\n\n/**\n * @const\n * @type {Array.<number>}\n */\nexport const defaultPadding = [0, 0, 0, 0];\n\n\n/**\n * @const\n * @type {number}\n */\nexport const defaultLineWidth = 1;\n\n\n/**\n * The label cache for text rendering. To change the default cache size of 2048\n * entries, use {@link module:ol/structs/LRUCache#setSize}.\n * @type {module:ol/structs/LRUCache.<HTMLCanvasElement>}\n * @api\n */\nexport const labelCache = new LRUCache();\n\n\n/**\n * @type {!Object.<string, number>}\n */\nexport const checkedFonts = {};\n\n\n/**\n * @type {CanvasRenderingContext2D}\n */\nlet measureContext = null;\n\n\n/**\n * @type {!Object.<string, number>}\n */\nexport const textHeights = {};\n\n\n/**\n * Clears the label cache when a font becomes available.\n * @param {string} fontSpec CSS font spec.\n */\nexport const checkFont = (function() {\n const retries = 60;\n const checked = checkedFonts;\n const size = '32px ';\n const referenceFonts = ['monospace', 'serif'];\n const len = referenceFonts.length;\n const text = 'wmytzilWMYTZIL@#/&?$%10\\uF013';\n let interval, referenceWidth;\n\n function isAvailable(font) {\n const context = getMeasureContext();\n let available = true;\n for (let i = 0; i < len; ++i) {\n const referenceFont = referenceFonts[i];\n context.font = size + referenceFont;\n referenceWidth = context.measureText(text).width;\n if (font != referenceFont) {\n context.font = size + font + ',' + referenceFont;\n const width = context.measureText(text).width;\n // If width and referenceWidth are the same, then the fallback was used\n // instead of the font we wanted, so the font is not available.\n available = available && width != referenceWidth;\n }\n }\n return available;\n }\n\n function check() {\n let done = true;\n for (const font in checked) {\n if (checked[font] < retries) {\n if (isAvailable(font)) {\n checked[font] = retries;\n clear(textHeights);\n // Make sure that loaded fonts are picked up by Safari\n measureContext = null;\n labelCache.clear();\n } else {\n ++checked[font];\n done = false;\n }\n }\n }\n if (done) {\n clearInterval(interval);\n interval = undefined;\n }\n }\n\n return function(fontSpec) {\n const fontFamilies = getFontFamilies(fontSpec);\n if (!fontFamilies) {\n return;\n }\n for (let i = 0, ii = fontFamilies.length; i < ii; ++i) {\n const fontFamily = fontFamilies[i];\n if (!(fontFamily in checked)) {\n checked[fontFamily] = retries;\n if (!isAvailable(fontFamily)) {\n checked[fontFamily] = 0;\n if (interval === undefined) {\n interval = setInterval(check, 32);\n }\n }\n }\n }\n };\n})();\n\n\n/**\n * @return {CanvasRenderingContext2D} Measure context.\n */\nfunction getMeasureContext() {\n if (!measureContext) {\n measureContext = createCanvasContext2D(1, 1);\n }\n return measureContext;\n}\n\n\n/**\n * @param {string} font Font to use for measuring.\n * @return {module:ol/size~Size} Measurement.\n */\nexport const measureTextHeight = (function() {\n let span;\n const heights = textHeights;\n return function(font) {\n let height = heights[font];\n if (height == undefined) {\n if (!span) {\n span = document.createElement('span');\n span.textContent = 'M';\n span.style.margin = span.style.padding = '0 !important';\n span.style.position = 'absolute !important';\n span.style.left = '-99999px !important';\n }\n span.style.font = font;\n document.body.appendChild(span);\n height = heights[font] = span.offsetHeight;\n document.body.removeChild(span);\n }\n return height;\n };\n})();\n\n\n/**\n * @param {string} font Font.\n * @param {string} text Text.\n * @return {number} Width.\n */\nexport function measureTextWidth(font, text) {\n const measureContext = getMeasureContext();\n if (font != measureContext.font) {\n measureContext.font = font;\n }\n return measureContext.measureText(text).width;\n}\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {number} rotation Rotation.\n * @param {number} offsetX X offset.\n * @param {number} offsetY Y offset.\n */\nexport function rotateAtOffset(context, rotation, offsetX, offsetY) {\n if (rotation !== 0) {\n context.translate(offsetX, offsetY);\n context.rotate(rotation);\n context.translate(-offsetX, -offsetY);\n }\n}\n\n\nexport const resetTransform = createTransform();\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {module:ol/transform~Transform|null} transform Transform.\n * @param {number} opacity Opacity.\n * @param {HTMLImageElement|HTMLCanvasElement|HTMLVideoElement} image Image.\n * @param {number} originX Origin X.\n * @param {number} originY Origin Y.\n * @param {number} w Width.\n * @param {number} h Height.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} scale Scale.\n */\nexport function drawImage(context,\n transform, opacity, image, originX, originY, w, h, x, y, scale) {\n let alpha;\n if (opacity != 1) {\n alpha = context.globalAlpha;\n context.globalAlpha = alpha * opacity;\n }\n if (transform) {\n context.setTransform.apply(context, transform);\n }\n\n context.drawImage(image, originX, originY, w, h, x, y, w * scale, h * scale);\n\n if (alpha) {\n context.globalAlpha = alpha;\n }\n if (transform) {\n context.setTransform.apply(context, resetTransform);\n }\n}\n","/**\n * @module ol/style/Image\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {number} opacity\n * @property {boolean} rotateWithView\n * @property {number} rotation\n * @property {number} scale\n * @property {boolean} snapToPixel\n */\n\n\n/**\n * @classdesc\n * A base class used for creating subclasses and not instantiated in\n * apps. Base class for {@link module:ol/style/Icon~Icon}, {@link module:ol/style/Circle~CircleStyle} and\n * {@link module:ol/style/RegularShape~RegularShape}.\n *\n * @constructor\n * @abstract\n * @param {module:ol/style/Image~Options} options Options.\n * @api\n */\nconst ImageStyle = function(options) {\n\n /**\n * @private\n * @type {number}\n */\n this.opacity_ = options.opacity;\n\n /**\n * @private\n * @type {boolean}\n */\n this.rotateWithView_ = options.rotateWithView;\n\n /**\n * @private\n * @type {number}\n */\n this.rotation_ = options.rotation;\n\n /**\n * @private\n * @type {number}\n */\n this.scale_ = options.scale;\n\n /**\n * @private\n * @type {boolean}\n */\n this.snapToPixel_ = options.snapToPixel;\n\n};\n\n\n/**\n * Get the symbolizer opacity.\n * @return {number} Opacity.\n * @api\n */\nImageStyle.prototype.getOpacity = function() {\n return this.opacity_;\n};\n\n\n/**\n * Determine whether the symbolizer rotates with the map.\n * @return {boolean} Rotate with map.\n * @api\n */\nImageStyle.prototype.getRotateWithView = function() {\n return this.rotateWithView_;\n};\n\n\n/**\n * Get the symoblizer rotation.\n * @return {number} Rotation.\n * @api\n */\nImageStyle.prototype.getRotation = function() {\n return this.rotation_;\n};\n\n\n/**\n * Get the symbolizer scale.\n * @return {number} Scale.\n * @api\n */\nImageStyle.prototype.getScale = function() {\n return this.scale_;\n};\n\n\n/**\n * Determine whether the symbolizer should be snapped to a pixel.\n * @return {boolean} The symbolizer should snap to a pixel.\n * @api\n */\nImageStyle.prototype.getSnapToPixel = function() {\n return this.snapToPixel_;\n};\n\n\n/**\n * Get the anchor point in pixels. The anchor determines the center point for the\n * symbolizer.\n * @abstract\n * @return {Array.<number>} Anchor.\n */\nImageStyle.prototype.getAnchor = function() {};\n\n\n/**\n * Get the image element for the symbolizer.\n * @abstract\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLCanvasElement|HTMLVideoElement|Image} Image element.\n */\nImageStyle.prototype.getImage = function(pixelRatio) {};\n\n\n/**\n * @abstract\n * @param {number} pixelRatio Pixel ratio.\n * @return {HTMLCanvasElement|HTMLVideoElement|Image} Image element.\n */\nImageStyle.prototype.getHitDetectionImage = function(pixelRatio) {};\n\n\n/**\n * @abstract\n * @return {module:ol/ImageState} Image state.\n */\nImageStyle.prototype.getImageState = function() {};\n\n\n/**\n * @abstract\n * @return {module:ol/size~Size} Image size.\n */\nImageStyle.prototype.getImageSize = function() {};\n\n\n/**\n * @abstract\n * @return {module:ol/size~Size} Size of the hit-detection image.\n */\nImageStyle.prototype.getHitDetectionImageSize = function() {};\n\n\n/**\n * Get the origin of the symbolizer.\n * @abstract\n * @return {Array.<number>} Origin.\n */\nImageStyle.prototype.getOrigin = function() {};\n\n\n/**\n * Get the size of the symbolizer (in pixels).\n * @abstract\n * @return {module:ol/size~Size} Size.\n */\nImageStyle.prototype.getSize = function() {};\n\n\n/**\n * Set the opacity.\n *\n * @param {number} opacity Opacity.\n * @api\n */\nImageStyle.prototype.setOpacity = function(opacity) {\n this.opacity_ = opacity;\n};\n\n\n/**\n * Set whether to rotate the style with the view.\n *\n * @param {boolean} rotateWithView Rotate with map.\n * @api\n */\nImageStyle.prototype.setRotateWithView = function(rotateWithView) {\n this.rotateWithView_ = rotateWithView;\n};\n\n\n/**\n * Set the rotation.\n *\n * @param {number} rotation Rotation.\n * @api\n */\nImageStyle.prototype.setRotation = function(rotation) {\n this.rotation_ = rotation;\n};\n\n\n/**\n * Set the scale.\n *\n * @param {number} scale Scale.\n * @api\n */\nImageStyle.prototype.setScale = function(scale) {\n this.scale_ = scale;\n};\n\n\n/**\n * Set whether to snap the image to the closest pixel.\n *\n * @param {boolean} snapToPixel Snap to pixel?\n * @api\n */\nImageStyle.prototype.setSnapToPixel = function(snapToPixel) {\n this.snapToPixel_ = snapToPixel;\n};\n\n\n/**\n * @abstract\n * @param {function(this: T, module:ol/events/Event)} listener Listener function.\n * @param {T} thisArg Value to use as `this` when executing `listener`.\n * @return {module:ol/events~EventsKey|undefined} Listener key.\n * @template T\n */\nImageStyle.prototype.listenImageChange = function(listener, thisArg) {};\n\n\n/**\n * Load not yet loaded URI.\n * @abstract\n */\nImageStyle.prototype.load = function() {};\n\n\n/**\n * @abstract\n * @param {function(this: T, module:ol/events/Event)} listener Listener function.\n * @param {T} thisArg Value to use as `this` when executing `listener`.\n * @template T\n */\nImageStyle.prototype.unlistenImageChange = function(listener, thisArg) {};\nexport default ImageStyle;\n","/**\n * @module ol/style/RegularShape\n */\nimport {inherits} from '../util.js';\nimport {asColorLike} from '../colorlike.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {CANVAS_LINE_DASH} from '../has.js';\nimport ImageState from '../ImageState.js';\nimport {defaultStrokeStyle, defaultFillStyle, defaultLineCap, defaultLineWidth, defaultLineJoin, defaultMiterLimit} from '../render/canvas.js';\nimport ImageStyle from '../style/Image.js';\n\n\n/**\n * Specify radius for regular polygons, or radius1 and radius2 for stars.\n * @typedef {Object} Options\n * @property {module:ol/style/Fill} [fill] Fill style.\n * @property {number} points Number of points for stars and regular polygons. In case of a polygon, the number of points\n * is the number of sides.\n * @property {number} [radius] Radius of a regular polygon.\n * @property {number} [radius1] Outer radius of a star.\n * @property {number} [radius2] Inner radius of a star.\n * @property {number} [angle=0] Shape's angle in radians. A value of 0 will have one of the shape's point facing up.\n * @property {boolean} [snapToPixel=true] If `true` integral numbers of pixels are used as the X and Y pixel coordinate\n * when drawing the shape in the output canvas. If `false` fractional numbers may be used. Using `true` allows for\n * \"sharp\" rendering (no blur), while using `false` allows for \"accurate\" rendering. Note that accuracy is important if\n * the shape's position is animated. Without it, the shape may jitter noticeably.\n * @property {module:ol/style/Stroke} [stroke] Stroke style.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {boolean} [rotateWithView=false] Whether to rotate the shape with the view.\n * @property {module:ol/style/AtlasManager} [atlasManager] The atlas manager to use for this symbol. When\n * using WebGL it is recommended to use an atlas manager to avoid texture switching. If an atlas manager is given, the\n * symbol is added to an atlas. By default no atlas manager is used.\n */\n\n\n/**\n * @typedef {Object} RenderOptions\n * @property {module:ol/colorlike~ColorLike} [strokeStyle]\n * @property {number} strokeWidth\n * @property {number} size\n * @property {string} lineCap\n * @property {Array.<number>} lineDash\n * @property {number} lineDashOffset\n * @property {string} lineJoin\n * @property {number} miterLimit\n */\n\n\n/**\n * @classdesc\n * Set regular shape style for vector features. The resulting shape will be\n * a regular polygon when `radius` is provided, or a star when `radius1` and\n * `radius2` are provided.\n *\n * @constructor\n * @param {module:ol/style/RegularShape~Options} options Options.\n * @extends {module:ol/style/Image}\n * @api\n */\nconst RegularShape = function(options) {\n /**\n * @private\n * @type {Array.<string>}\n */\n this.checksums_ = null;\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = null;\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.hitDetectionCanvas_ = null;\n\n /**\n * @private\n * @type {module:ol/style/Fill}\n */\n this.fill_ = options.fill !== undefined ? options.fill : null;\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.origin_ = [0, 0];\n\n /**\n * @private\n * @type {number}\n */\n this.points_ = options.points;\n\n /**\n * @protected\n * @type {number}\n */\n this.radius_ = /** @type {number} */ (options.radius !== undefined ?\n options.radius : options.radius1);\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.radius2_ = options.radius2;\n\n /**\n * @private\n * @type {number}\n */\n this.angle_ = options.angle !== undefined ? options.angle : 0;\n\n /**\n * @private\n * @type {module:ol/style/Stroke}\n */\n this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.anchor_ = null;\n\n /**\n * @private\n * @type {module:ol/size~Size}\n */\n this.size_ = null;\n\n /**\n * @private\n * @type {module:ol/size~Size}\n */\n this.imageSize_ = null;\n\n /**\n * @private\n * @type {module:ol/size~Size}\n */\n this.hitDetectionImageSize_ = null;\n\n /**\n * @protected\n * @type {module:ol/style/AtlasManager|undefined}\n */\n this.atlasManager_ = options.atlasManager;\n\n this.render_(this.atlasManager_);\n\n /**\n * @type {boolean}\n */\n const snapToPixel = options.snapToPixel !== undefined ?\n options.snapToPixel : true;\n\n /**\n * @type {boolean}\n */\n const rotateWithView = options.rotateWithView !== undefined ?\n options.rotateWithView : false;\n\n ImageStyle.call(this, {\n opacity: 1,\n rotateWithView: rotateWithView,\n rotation: options.rotation !== undefined ? options.rotation : 0,\n scale: 1,\n snapToPixel: snapToPixel\n });\n};\n\ninherits(RegularShape, ImageStyle);\n\n\n/**\n * Clones the style. If an atlasmanager was provided to the original style it will be used in the cloned style, too.\n * @return {module:ol/style/RegularShape} The cloned style.\n * @api\n */\nRegularShape.prototype.clone = function() {\n const style = new RegularShape({\n fill: this.getFill() ? this.getFill().clone() : undefined,\n points: this.getPoints(),\n radius: this.getRadius(),\n radius2: this.getRadius2(),\n angle: this.getAngle(),\n snapToPixel: this.getSnapToPixel(),\n stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n rotation: this.getRotation(),\n rotateWithView: this.getRotateWithView(),\n atlasManager: this.atlasManager_\n });\n style.setOpacity(this.getOpacity());\n style.setScale(this.getScale());\n return style;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nRegularShape.prototype.getAnchor = function() {\n return this.anchor_;\n};\n\n\n/**\n * Get the angle used in generating the shape.\n * @return {number} Shape's rotation in radians.\n * @api\n */\nRegularShape.prototype.getAngle = function() {\n return this.angle_;\n};\n\n\n/**\n * Get the fill style for the shape.\n * @return {module:ol/style/Fill} Fill style.\n * @api\n */\nRegularShape.prototype.getFill = function() {\n return this.fill_;\n};\n\n\n/**\n * @inheritDoc\n */\nRegularShape.prototype.getHitDetectionImage = function(pixelRatio) {\n return this.hitDetectionCanvas_;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nRegularShape.prototype.getImage = function(pixelRatio) {\n return this.canvas_;\n};\n\n\n/**\n * @inheritDoc\n */\nRegularShape.prototype.getImageSize = function() {\n return this.imageSize_;\n};\n\n\n/**\n * @inheritDoc\n */\nRegularShape.prototype.getHitDetectionImageSize = function() {\n return this.hitDetectionImageSize_;\n};\n\n\n/**\n * @inheritDoc\n */\nRegularShape.prototype.getImageState = function() {\n return ImageState.LOADED;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nRegularShape.prototype.getOrigin = function() {\n return this.origin_;\n};\n\n\n/**\n * Get the number of points for generating the shape.\n * @return {number} Number of points for stars and regular polygons.\n * @api\n */\nRegularShape.prototype.getPoints = function() {\n return this.points_;\n};\n\n\n/**\n * Get the (primary) radius for the shape.\n * @return {number} Radius.\n * @api\n */\nRegularShape.prototype.getRadius = function() {\n return this.radius_;\n};\n\n\n/**\n * Get the secondary radius for the shape.\n * @return {number|undefined} Radius2.\n * @api\n */\nRegularShape.prototype.getRadius2 = function() {\n return this.radius2_;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nRegularShape.prototype.getSize = function() {\n return this.size_;\n};\n\n\n/**\n * Get the stroke style for the shape.\n * @return {module:ol/style/Stroke} Stroke style.\n * @api\n */\nRegularShape.prototype.getStroke = function() {\n return this.stroke_;\n};\n\n\n/**\n * @inheritDoc\n */\nRegularShape.prototype.listenImageChange = function(listener, thisArg) {};\n\n\n/**\n * @inheritDoc\n */\nRegularShape.prototype.load = function() {};\n\n\n/**\n * @inheritDoc\n */\nRegularShape.prototype.unlistenImageChange = function(listener, thisArg) {};\n\n\n/**\n * @protected\n * @param {module:ol/style/AtlasManager|undefined} atlasManager An atlas manager.\n */\nRegularShape.prototype.render_ = function(atlasManager) {\n let imageSize;\n let lineCap = '';\n let lineJoin = '';\n let miterLimit = 0;\n let lineDash = null;\n let lineDashOffset = 0;\n let strokeStyle;\n let strokeWidth = 0;\n\n if (this.stroke_) {\n strokeStyle = this.stroke_.getColor();\n if (strokeStyle === null) {\n strokeStyle = defaultStrokeStyle;\n }\n strokeStyle = asColorLike(strokeStyle);\n strokeWidth = this.stroke_.getWidth();\n if (strokeWidth === undefined) {\n strokeWidth = defaultLineWidth;\n }\n lineDash = this.stroke_.getLineDash();\n lineDashOffset = this.stroke_.getLineDashOffset();\n if (!CANVAS_LINE_DASH) {\n lineDash = null;\n lineDashOffset = 0;\n }\n lineJoin = this.stroke_.getLineJoin();\n if (lineJoin === undefined) {\n lineJoin = defaultLineJoin;\n }\n lineCap = this.stroke_.getLineCap();\n if (lineCap === undefined) {\n lineCap = defaultLineCap;\n }\n miterLimit = this.stroke_.getMiterLimit();\n if (miterLimit === undefined) {\n miterLimit = defaultMiterLimit;\n }\n }\n\n let size = 2 * (this.radius_ + strokeWidth) + 1;\n\n /** @type {module:ol/style/RegularShape~RenderOptions} */\n const renderOptions = {\n strokeStyle: strokeStyle,\n strokeWidth: strokeWidth,\n size: size,\n lineCap: lineCap,\n lineDash: lineDash,\n lineDashOffset: lineDashOffset,\n lineJoin: lineJoin,\n miterLimit: miterLimit\n };\n\n if (atlasManager === undefined) {\n // no atlas manager is used, create a new canvas\n const context = createCanvasContext2D(size, size);\n this.canvas_ = context.canvas;\n\n // canvas.width and height are rounded to the closest integer\n size = this.canvas_.width;\n imageSize = size;\n\n this.draw_(renderOptions, context, 0, 0);\n\n this.createHitDetectionCanvas_(renderOptions);\n } else {\n // an atlas manager is used, add the symbol to an atlas\n size = Math.round(size);\n\n const hasCustomHitDetectionImage = !this.fill_;\n let renderHitDetectionCallback;\n if (hasCustomHitDetectionImage) {\n // render the hit-detection image into a separate atlas image\n renderHitDetectionCallback =\n this.drawHitDetectionCanvas_.bind(this, renderOptions);\n }\n\n const id = this.getChecksum();\n const info = atlasManager.add(\n id, size, size, this.draw_.bind(this, renderOptions),\n renderHitDetectionCallback);\n\n this.canvas_ = info.image;\n this.origin_ = [info.offsetX, info.offsetY];\n imageSize = info.image.width;\n\n if (hasCustomHitDetectionImage) {\n this.hitDetectionCanvas_ = info.hitImage;\n this.hitDetectionImageSize_ =\n [info.hitImage.width, info.hitImage.height];\n } else {\n this.hitDetectionCanvas_ = this.canvas_;\n this.hitDetectionImageSize_ = [imageSize, imageSize];\n }\n }\n\n this.anchor_ = [size / 2, size / 2];\n this.size_ = [size, size];\n this.imageSize_ = [imageSize, imageSize];\n};\n\n\n/**\n * @private\n * @param {module:ol/style/RegularShape~RenderOptions} renderOptions Render options.\n * @param {CanvasRenderingContext2D} context The rendering context.\n * @param {number} x The origin for the symbol (x).\n * @param {number} y The origin for the symbol (y).\n */\nRegularShape.prototype.draw_ = function(renderOptions, context, x, y) {\n let i, angle0, radiusC;\n // reset transform\n context.setTransform(1, 0, 0, 1, 0, 0);\n\n // then move to (x, y)\n context.translate(x, y);\n\n context.beginPath();\n\n let points = this.points_;\n if (points === Infinity) {\n context.arc(\n renderOptions.size / 2, renderOptions.size / 2,\n this.radius_, 0, 2 * Math.PI, true);\n } else {\n const radius2 = (this.radius2_ !== undefined) ? this.radius2_\n : this.radius_;\n if (radius2 !== this.radius_) {\n points = 2 * points;\n }\n for (i = 0; i <= points; i++) {\n angle0 = i * 2 * Math.PI / points - Math.PI / 2 + this.angle_;\n radiusC = i % 2 === 0 ? this.radius_ : radius2;\n context.lineTo(renderOptions.size / 2 + radiusC * Math.cos(angle0),\n renderOptions.size / 2 + radiusC * Math.sin(angle0));\n }\n }\n\n\n if (this.fill_) {\n let color = this.fill_.getColor();\n if (color === null) {\n color = defaultFillStyle;\n }\n context.fillStyle = asColorLike(color);\n context.fill();\n }\n if (this.stroke_) {\n context.strokeStyle = renderOptions.strokeStyle;\n context.lineWidth = renderOptions.strokeWidth;\n if (renderOptions.lineDash) {\n context.setLineDash(renderOptions.lineDash);\n context.lineDashOffset = renderOptions.lineDashOffset;\n }\n context.lineCap = renderOptions.lineCap;\n context.lineJoin = renderOptions.lineJoin;\n context.miterLimit = renderOptions.miterLimit;\n context.stroke();\n }\n context.closePath();\n};\n\n\n/**\n * @private\n * @param {module:ol/style/RegularShape~RenderOptions} renderOptions Render options.\n */\nRegularShape.prototype.createHitDetectionCanvas_ = function(renderOptions) {\n this.hitDetectionImageSize_ = [renderOptions.size, renderOptions.size];\n if (this.fill_) {\n this.hitDetectionCanvas_ = this.canvas_;\n return;\n }\n\n // if no fill style is set, create an extra hit-detection image with a\n // default fill style\n const context = createCanvasContext2D(renderOptions.size, renderOptions.size);\n this.hitDetectionCanvas_ = context.canvas;\n\n this.drawHitDetectionCanvas_(renderOptions, context, 0, 0);\n};\n\n\n/**\n * @private\n * @param {module:ol/style/RegularShape~RenderOptions} renderOptions Render options.\n * @param {CanvasRenderingContext2D} context The context.\n * @param {number} x The origin for the symbol (x).\n * @param {number} y The origin for the symbol (y).\n */\nRegularShape.prototype.drawHitDetectionCanvas_ = function(renderOptions, context, x, y) {\n // reset transform\n context.setTransform(1, 0, 0, 1, 0, 0);\n\n // then move to (x, y)\n context.translate(x, y);\n\n context.beginPath();\n\n let points = this.points_;\n if (points === Infinity) {\n context.arc(\n renderOptions.size / 2, renderOptions.size / 2,\n this.radius_, 0, 2 * Math.PI, true);\n } else {\n const radius2 = (this.radius2_ !== undefined) ? this.radius2_\n : this.radius_;\n if (radius2 !== this.radius_) {\n points = 2 * points;\n }\n let i, radiusC, angle0;\n for (i = 0; i <= points; i++) {\n angle0 = i * 2 * Math.PI / points - Math.PI / 2 + this.angle_;\n radiusC = i % 2 === 0 ? this.radius_ : radius2;\n context.lineTo(renderOptions.size / 2 + radiusC * Math.cos(angle0),\n renderOptions.size / 2 + radiusC * Math.sin(angle0));\n }\n }\n\n context.fillStyle = defaultFillStyle;\n context.fill();\n if (this.stroke_) {\n context.strokeStyle = renderOptions.strokeStyle;\n context.lineWidth = renderOptions.strokeWidth;\n if (renderOptions.lineDash) {\n context.setLineDash(renderOptions.lineDash);\n context.lineDashOffset = renderOptions.lineDashOffset;\n }\n context.stroke();\n }\n context.closePath();\n};\n\n\n/**\n * @return {string} The checksum.\n */\nRegularShape.prototype.getChecksum = function() {\n const strokeChecksum = this.stroke_ ?\n this.stroke_.getChecksum() : '-';\n const fillChecksum = this.fill_ ?\n this.fill_.getChecksum() : '-';\n\n const recalculate = !this.checksums_ ||\n (strokeChecksum != this.checksums_[1] ||\n fillChecksum != this.checksums_[2] ||\n this.radius_ != this.checksums_[3] ||\n this.radius2_ != this.checksums_[4] ||\n this.angle_ != this.checksums_[5] ||\n this.points_ != this.checksums_[6]);\n\n if (recalculate) {\n const checksum = 'r' + strokeChecksum + fillChecksum +\n (this.radius_ !== undefined ? this.radius_.toString() : '-') +\n (this.radius2_ !== undefined ? this.radius2_.toString() : '-') +\n (this.angle_ !== undefined ? this.angle_.toString() : '-') +\n (this.points_ !== undefined ? this.points_.toString() : '-');\n this.checksums_ = [checksum, strokeChecksum, fillChecksum,\n this.radius_, this.radius2_, this.angle_, this.points_];\n }\n\n return this.checksums_[0];\n};\nexport default RegularShape;\n","/**\n * @module ol/style/Circle\n */\nimport {inherits} from '../util.js';\nimport RegularShape from '../style/RegularShape.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/style/Fill} [fill] Fill style.\n * @property {number} radius Circle radius.\n * @property {boolean} [snapToPixel=true] If `true` integral numbers of pixels are used as the X and Y pixel coordinate\n * when drawing the circle in the output canvas. If `false` fractional numbers may be used. Using `true` allows for\n * \"sharp\" rendering (no blur), while using `false` allows for \"accurate\" rendering. Note that accuracy is important if\n * the circle's position is animated. Without it, the circle may jitter noticeably.\n * @property {module:ol/style/Stroke} [stroke] Stroke style.\n * @property {module:ol/style/AtlasManager} [atlasManager] The atlas manager to use for this circle.\n * When using WebGL it is recommended to use an atlas manager to avoid texture switching. If an atlas manager is given,\n * the circle is added to an atlas. By default no atlas manager is used.\n */\n\n\n/**\n * @classdesc\n * Set circle style for vector features.\n *\n * @constructor\n * @param {module:ol/style/Circle~Options=} opt_options Options.\n * @extends {module:ol/style/RegularShape}\n * @api\n */\nconst CircleStyle = function(opt_options) {\n\n const options = opt_options || {};\n\n RegularShape.call(this, {\n points: Infinity,\n fill: options.fill,\n radius: options.radius,\n snapToPixel: options.snapToPixel,\n stroke: options.stroke,\n atlasManager: options.atlasManager\n });\n\n};\n\ninherits(CircleStyle, RegularShape);\n\n\n/**\n * Clones the style. If an atlasmanager was provided to the original style it will be used in the cloned style, too.\n * @return {module:ol/style/Circle} The cloned style.\n * @override\n * @api\n */\nCircleStyle.prototype.clone = function() {\n const style = new CircleStyle({\n fill: this.getFill() ? this.getFill().clone() : undefined,\n stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n radius: this.getRadius(),\n snapToPixel: this.getSnapToPixel(),\n atlasManager: this.atlasManager_\n });\n style.setOpacity(this.getOpacity());\n style.setScale(this.getScale());\n return style;\n};\n\n\n/**\n * Set the circle radius.\n *\n * @param {number} radius Circle radius.\n * @api\n */\nCircleStyle.prototype.setRadius = function(radius) {\n this.radius_ = radius;\n this.render_(this.atlasManager_);\n};\nexport default CircleStyle;\n","/**\n * @module ol/style/Fill\n */\nimport {getUid} from '../util.js';\nimport {asString} from '../color.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/color~Color|module:ol/colorlike~ColorLike} [color] A color, gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.\n * Default null; if null, the Canvas/renderer default black will be used.\n */\n\n\n/**\n * @classdesc\n * Set fill style for vector features.\n *\n * @constructor\n * @param {module:ol/style/Fill~Options=} opt_options Options.\n * @api\n */\nconst Fill = function(opt_options) {\n\n const options = opt_options || {};\n\n /**\n * @private\n * @type {module:ol/color~Color|module:ol/colorlike~ColorLike}\n */\n this.color_ = options.color !== undefined ? options.color : null;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.checksum_ = undefined;\n};\n\n\n/**\n * Clones the style. The color is not cloned if it is an {@link module:ol/colorlike~ColorLike}.\n * @return {module:ol/style/Fill} The cloned style.\n * @api\n */\nFill.prototype.clone = function() {\n const color = this.getColor();\n return new Fill({\n color: (color && color.slice) ? color.slice() : color || undefined\n });\n};\n\n\n/**\n * Get the fill color.\n * @return {module:ol/color~Color|module:ol/colorlike~ColorLike} Color.\n * @api\n */\nFill.prototype.getColor = function() {\n return this.color_;\n};\n\n\n/**\n * Set the color.\n *\n * @param {module:ol/color~Color|module:ol/colorlike~ColorLike} color Color.\n * @api\n */\nFill.prototype.setColor = function(color) {\n this.color_ = color;\n this.checksum_ = undefined;\n};\n\n\n/**\n * @return {string} The checksum.\n */\nFill.prototype.getChecksum = function() {\n if (this.checksum_ === undefined) {\n if (\n this.color_ instanceof CanvasPattern ||\n this.color_ instanceof CanvasGradient\n ) {\n this.checksum_ = getUid(this.color_).toString();\n } else {\n this.checksum_ = 'f' + (this.color_ ? asString(this.color_) : '-');\n }\n }\n\n return this.checksum_;\n};\nexport default Fill;\n","/**\n * @module ol/style/Stroke\n */\nimport {getUid} from '../util.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/color~Color|module:ol/colorlike~ColorLike} [color] A color, gradient or pattern.\n * See {@link module:ol/color~Color} and {@link module:ol/colorlike~ColorLike} for possible formats.\n * Default null; if null, the Canvas/renderer default black will be used.\n * @property {string} [lineCap='round'] Line cap style: `butt`, `round`, or `square`.\n * @property {string} [lineJoin='round'] Line join style: `bevel`, `round`, or `miter`.\n * @property {Array.<number>} [lineDash] Line dash pattern. Default is `undefined` (no dash).\n * Please note that Internet Explorer 10 and lower do not support the `setLineDash` method on\n * the `CanvasRenderingContext2D` and therefore this option will have no visual effect in these browsers.\n * @property {number} [lineDashOffset=0] Line dash offset.\n * @property {number} [miterLimit=10] Miter limit.\n * @property {number} [width] Width.\n */\n\n\n/**\n * @classdesc\n * Set stroke style for vector features.\n * Note that the defaults given are the Canvas defaults, which will be used if\n * option is not defined. The `get` functions return whatever was entered in\n * the options; they will not return the default.\n *\n * @constructor\n * @param {module:ol/style/Stroke~Options=} opt_options Options.\n * @api\n */\nconst Stroke = function(opt_options) {\n\n const options = opt_options || {};\n\n /**\n * @private\n * @type {module:ol/color~Color|module:ol/colorlike~ColorLike}\n */\n this.color_ = options.color !== undefined ? options.color : null;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.lineCap_ = options.lineCap;\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.lineDash_ = options.lineDash !== undefined ? options.lineDash : null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.lineDashOffset_ = options.lineDashOffset;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.lineJoin_ = options.lineJoin;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.miterLimit_ = options.miterLimit;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.width_ = options.width;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.checksum_ = undefined;\n};\n\n\n/**\n * Clones the style.\n * @return {module:ol/style/Stroke} The cloned style.\n * @api\n */\nStroke.prototype.clone = function() {\n const color = this.getColor();\n return new Stroke({\n color: (color && color.slice) ? color.slice() : color || undefined,\n lineCap: this.getLineCap(),\n lineDash: this.getLineDash() ? this.getLineDash().slice() : undefined,\n lineDashOffset: this.getLineDashOffset(),\n lineJoin: this.getLineJoin(),\n miterLimit: this.getMiterLimit(),\n width: this.getWidth()\n });\n};\n\n\n/**\n * Get the stroke color.\n * @return {module:ol/color~Color|module:ol/colorlike~ColorLike} Color.\n * @api\n */\nStroke.prototype.getColor = function() {\n return this.color_;\n};\n\n\n/**\n * Get the line cap type for the stroke.\n * @return {string|undefined} Line cap.\n * @api\n */\nStroke.prototype.getLineCap = function() {\n return this.lineCap_;\n};\n\n\n/**\n * Get the line dash style for the stroke.\n * @return {Array.<number>} Line dash.\n * @api\n */\nStroke.prototype.getLineDash = function() {\n return this.lineDash_;\n};\n\n\n/**\n * Get the line dash offset for the stroke.\n * @return {number|undefined} Line dash offset.\n * @api\n */\nStroke.prototype.getLineDashOffset = function() {\n return this.lineDashOffset_;\n};\n\n\n/**\n * Get the line join type for the stroke.\n * @return {string|undefined} Line join.\n * @api\n */\nStroke.prototype.getLineJoin = function() {\n return this.lineJoin_;\n};\n\n\n/**\n * Get the miter limit for the stroke.\n * @return {number|undefined} Miter limit.\n * @api\n */\nStroke.prototype.getMiterLimit = function() {\n return this.miterLimit_;\n};\n\n\n/**\n * Get the stroke width.\n * @return {number|undefined} Width.\n * @api\n */\nStroke.prototype.getWidth = function() {\n return this.width_;\n};\n\n\n/**\n * Set the color.\n *\n * @param {module:ol/color~Color|module:ol/colorlike~ColorLike} color Color.\n * @api\n */\nStroke.prototype.setColor = function(color) {\n this.color_ = color;\n this.checksum_ = undefined;\n};\n\n\n/**\n * Set the line cap.\n *\n * @param {string|undefined} lineCap Line cap.\n * @api\n */\nStroke.prototype.setLineCap = function(lineCap) {\n this.lineCap_ = lineCap;\n this.checksum_ = undefined;\n};\n\n\n/**\n * Set the line dash.\n *\n * Please note that Internet Explorer 10 and lower [do not support][mdn] the\n * `setLineDash` method on the `CanvasRenderingContext2D` and therefore this\n * property will have no visual effect in these browsers.\n *\n * [mdn]: https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/setLineDash#Browser_compatibility\n *\n * @param {Array.<number>} lineDash Line dash.\n * @api\n */\nStroke.prototype.setLineDash = function(lineDash) {\n this.lineDash_ = lineDash;\n this.checksum_ = undefined;\n};\n\n\n/**\n * Set the line dash offset.\n *\n * @param {number|undefined} lineDashOffset Line dash offset.\n * @api\n */\nStroke.prototype.setLineDashOffset = function(lineDashOffset) {\n this.lineDashOffset_ = lineDashOffset;\n this.checksum_ = undefined;\n};\n\n\n/**\n * Set the line join.\n *\n * @param {string|undefined} lineJoin Line join.\n * @api\n */\nStroke.prototype.setLineJoin = function(lineJoin) {\n this.lineJoin_ = lineJoin;\n this.checksum_ = undefined;\n};\n\n\n/**\n * Set the miter limit.\n *\n * @param {number|undefined} miterLimit Miter limit.\n * @api\n */\nStroke.prototype.setMiterLimit = function(miterLimit) {\n this.miterLimit_ = miterLimit;\n this.checksum_ = undefined;\n};\n\n\n/**\n * Set the width.\n *\n * @param {number|undefined} width Width.\n * @api\n */\nStroke.prototype.setWidth = function(width) {\n this.width_ = width;\n this.checksum_ = undefined;\n};\n\n\n/**\n * @return {string} The checksum.\n */\nStroke.prototype.getChecksum = function() {\n if (this.checksum_ === undefined) {\n this.checksum_ = 's';\n if (this.color_) {\n if (typeof this.color_ === 'string') {\n this.checksum_ += this.color_;\n } else {\n this.checksum_ += getUid(this.color_).toString();\n }\n } else {\n this.checksum_ += '-';\n }\n this.checksum_ += ',' +\n (this.lineCap_ !== undefined ?\n this.lineCap_.toString() : '-') + ',' +\n (this.lineDash_ ?\n this.lineDash_.toString() : '-') + ',' +\n (this.lineDashOffset_ !== undefined ?\n this.lineDashOffset_ : '-') + ',' +\n (this.lineJoin_ !== undefined ?\n this.lineJoin_ : '-') + ',' +\n (this.miterLimit_ !== undefined ?\n this.miterLimit_.toString() : '-') + ',' +\n (this.width_ !== undefined ?\n this.width_.toString() : '-');\n }\n\n return this.checksum_;\n};\nexport default Stroke;\n","/**\n * @module ol/style/Style\n */\n\n/**\n * Feature styles.\n *\n * If no style is defined, the following default style is used:\n * ```js\n * import {Fill, Stroke, Circle, Style} from 'ol/style';\n *\n * var fill = new Fill({\n * color: 'rgba(255,255,255,0.4)'\n * });\n * var stroke = new Stroke({\n * color: '#3399CC',\n * width: 1.25\n * });\n * var styles = [\n * new Style({\n * image: new Circle({\n * fill: fill,\n * stroke: stroke,\n * radius: 5\n * }),\n * fill: fill,\n * stroke: stroke\n * })\n * ];\n * ```\n *\n * A separate editing style has the following defaults:\n * ```js\n * import {Fill, Stroke, Circle, Style} from 'ol/style';\n * import GeometryType from 'ol/geom/GeometryType';\n *\n * var white = [255, 255, 255, 1];\n * var blue = [0, 153, 255, 1];\n * var width = 3;\n * styles[GeometryType.POLYGON] = [\n * new Style({\n * fill: new Fill({\n * color: [255, 255, 255, 0.5]\n * })\n * })\n * ];\n * styles[GeometryType.MULTI_POLYGON] =\n * styles[GeometryType.POLYGON];\n * styles[GeometryType.LINE_STRING] = [\n * new Style({\n * stroke: new Stroke({\n * color: white,\n * width: width + 2\n * })\n * }),\n * new Style({\n * stroke: new Stroke({\n * color: blue,\n * width: width\n * })\n * })\n * ];\n * styles[GeometryType.MULTI_LINE_STRING] =\n * styles[GeometryType.LINE_STRING];\n * styles[GeometryType.POINT] = [\n * new Style({\n * image: new Circle({\n * radius: width * 2,\n * fill: new Fill({\n * color: blue\n * }),\n * stroke: new Stroke({\n * color: white,\n * width: width / 2\n * })\n * }),\n * zIndex: Infinity\n * })\n * ];\n * styles[GeometryType.MULTI_POINT] =\n * styles[GeometryType.POINT];\n * styles[GeometryType.GEOMETRY_COLLECTION] =\n * styles[GeometryType.POLYGON].concat(\n * styles[GeometryType.LINE_STRING],\n * styles[GeometryType.POINT]\n * );\n * ```\n */\nimport {assert} from '../asserts.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport CircleStyle from '../style/Circle.js';\nimport Fill from '../style/Fill.js';\nimport Stroke from '../style/Stroke.js';\n\n\n/**\n * A function that takes an {@link module:ol/Feature} and a `{number}`\n * representing the view's resolution. The function should return a\n * {@link module:ol/style/Style} or an array of them. This way e.g. a\n * vector layer can be styled.\n *\n * @typedef {function((module:ol/Feature|module:ol/render/Feature), number):\n * (module:ol/style/Style|Array.<module:ol/style/Style>)} StyleFunction\n */\n\n\n/**\n * A function that takes an {@link module:ol/Feature} as argument and returns an\n * {@link module:ol/geom/Geometry} that will be rendered and styled for the feature.\n *\n * @typedef {function((module:ol/Feature|module:ol/render/Feature)):\n * (module:ol/geom/Geometry|module:ol/render/Feature|undefined)} GeometryFunction\n */\n\n\n/**\n * Custom renderer function. Takes two arguments:\n *\n * 1. The pixel coordinates of the geometry in GeoJSON notation.\n * 2. The {@link module:ol/render~State} of the layer renderer.\n *\n * @typedef {function((module:ol/coordinate~Coordinate|Array<module:ol/coordinate~Coordinate>|Array.<Array.<module:ol/coordinate~Coordinate>>),module:ol/render~State)}\n * RenderFunction\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {string|module:ol/geom/Geometry|module:ol/style/Style~GeometryFunction} [geometry] Feature property or geometry\n * or function returning a geometry to render for this style.\n * @property {module:ol/style/Fill} [fill] Fill style.\n * @property {module:ol/style/Image} [image] Image style.\n * @property {module:ol/style/Style~RenderFunction} [renderer] Custom renderer. When configured, `fill`, `stroke` and `image` will be\n * ignored, and the provided function will be called with each render frame for each geometry.\n * @property {module:ol/style/Stroke} [stroke] Stroke style.\n * @property {module:ol/style/Text} [text] Text style.\n * @property {number} [zIndex] Z index.\n */\n\n\n/**\n * @classdesc\n * Container for vector feature rendering styles. Any changes made to the style\n * or its children through `set*()` methods will not take effect until the\n * feature or layer that uses the style is re-rendered.\n *\n * @constructor\n * @struct\n * @param {module:ol/style/Style~Options=} opt_options Style options.\n * @api\n */\nconst Style = function(opt_options) {\n\n const options = opt_options || {};\n\n /**\n * @private\n * @type {string|module:ol/geom/Geometry|module:ol/style/Style~GeometryFunction}\n */\n this.geometry_ = null;\n\n /**\n * @private\n * @type {!module:ol/style/Style~GeometryFunction}\n */\n this.geometryFunction_ = defaultGeometryFunction;\n\n if (options.geometry !== undefined) {\n this.setGeometry(options.geometry);\n }\n\n /**\n * @private\n * @type {module:ol/style/Fill}\n */\n this.fill_ = options.fill !== undefined ? options.fill : null;\n\n /**\n * @private\n * @type {module:ol/style/Image}\n */\n this.image_ = options.image !== undefined ? options.image : null;\n\n /**\n * @private\n * @type {module:ol/style/Style~RenderFunction|null}\n */\n this.renderer_ = options.renderer !== undefined ? options.renderer : null;\n\n /**\n * @private\n * @type {module:ol/style/Stroke}\n */\n this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n /**\n * @private\n * @type {module:ol/style/Text}\n */\n this.text_ = options.text !== undefined ? options.text : null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.zIndex_ = options.zIndex;\n\n};\n\n\n/**\n * Clones the style.\n * @return {module:ol/style/Style} The cloned style.\n * @api\n */\nStyle.prototype.clone = function() {\n let geometry = this.getGeometry();\n if (geometry && geometry.clone) {\n geometry = geometry.clone();\n }\n return new Style({\n geometry: geometry,\n fill: this.getFill() ? this.getFill().clone() : undefined,\n image: this.getImage() ? this.getImage().clone() : undefined,\n stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n text: this.getText() ? this.getText().clone() : undefined,\n zIndex: this.getZIndex()\n });\n};\n\n\n/**\n * Get the custom renderer function that was configured with\n * {@link #setRenderer} or the `renderer` constructor option.\n * @return {module:ol/style/Style~RenderFunction|null} Custom renderer function.\n * @api\n */\nStyle.prototype.getRenderer = function() {\n return this.renderer_;\n};\n\n\n/**\n * Sets a custom renderer function for this style. When set, `fill`, `stroke`\n * and `image` options of the style will be ignored.\n * @param {module:ol/style/Style~RenderFunction|null} renderer Custom renderer function.\n * @api\n */\nStyle.prototype.setRenderer = function(renderer) {\n this.renderer_ = renderer;\n};\n\n\n/**\n * Get the geometry to be rendered.\n * @return {string|module:ol/geom/Geometry|module:ol/style/Style~GeometryFunction}\n * Feature property or geometry or function that returns the geometry that will\n * be rendered with this style.\n * @api\n */\nStyle.prototype.getGeometry = function() {\n return this.geometry_;\n};\n\n\n/**\n * Get the function used to generate a geometry for rendering.\n * @return {!module:ol/style/Style~GeometryFunction} Function that is called with a feature\n * and returns the geometry to render instead of the feature's geometry.\n * @api\n */\nStyle.prototype.getGeometryFunction = function() {\n return this.geometryFunction_;\n};\n\n\n/**\n * Get the fill style.\n * @return {module:ol/style/Fill} Fill style.\n * @api\n */\nStyle.prototype.getFill = function() {\n return this.fill_;\n};\n\n\n/**\n * Set the fill style.\n * @param {module:ol/style/Fill} fill Fill style.\n * @api\n */\nStyle.prototype.setFill = function(fill) {\n this.fill_ = fill;\n};\n\n\n/**\n * Get the image style.\n * @return {module:ol/style/Image} Image style.\n * @api\n */\nStyle.prototype.getImage = function() {\n return this.image_;\n};\n\n\n/**\n * Set the image style.\n * @param {module:ol/style/Image} image Image style.\n * @api\n */\nStyle.prototype.setImage = function(image) {\n this.image_ = image;\n};\n\n\n/**\n * Get the stroke style.\n * @return {module:ol/style/Stroke} Stroke style.\n * @api\n */\nStyle.prototype.getStroke = function() {\n return this.stroke_;\n};\n\n\n/**\n * Set the stroke style.\n * @param {module:ol/style/Stroke} stroke Stroke style.\n * @api\n */\nStyle.prototype.setStroke = function(stroke) {\n this.stroke_ = stroke;\n};\n\n\n/**\n * Get the text style.\n * @return {module:ol/style/Text} Text style.\n * @api\n */\nStyle.prototype.getText = function() {\n return this.text_;\n};\n\n\n/**\n * Set the text style.\n * @param {module:ol/style/Text} text Text style.\n * @api\n */\nStyle.prototype.setText = function(text) {\n this.text_ = text;\n};\n\n\n/**\n * Get the z-index for the style.\n * @return {number|undefined} ZIndex.\n * @api\n */\nStyle.prototype.getZIndex = function() {\n return this.zIndex_;\n};\n\n\n/**\n * Set a geometry that is rendered instead of the feature's geometry.\n *\n * @param {string|module:ol/geom/Geometry|module:ol/style/Style~GeometryFunction} geometry\n * Feature property or geometry or function returning a geometry to render\n * for this style.\n * @api\n */\nStyle.prototype.setGeometry = function(geometry) {\n if (typeof geometry === 'function') {\n this.geometryFunction_ = geometry;\n } else if (typeof geometry === 'string') {\n this.geometryFunction_ = function(feature) {\n return (\n /** @type {module:ol/geom/Geometry} */ (feature.get(geometry))\n );\n };\n } else if (!geometry) {\n this.geometryFunction_ = defaultGeometryFunction;\n } else if (geometry !== undefined) {\n this.geometryFunction_ = function() {\n return (\n /** @type {module:ol/geom/Geometry} */ (geometry)\n );\n };\n }\n this.geometry_ = geometry;\n};\n\n\n/**\n * Set the z-index.\n *\n * @param {number|undefined} zIndex ZIndex.\n * @api\n */\nStyle.prototype.setZIndex = function(zIndex) {\n this.zIndex_ = zIndex;\n};\n\n\n/**\n * Convert the provided object into a style function. Functions passed through\n * unchanged. Arrays of module:ol/style/Style or single style objects wrapped in a\n * new style function.\n * @param {module:ol/style/Style~StyleFunction|Array.<module:ol/style/Style>|module:ol/style/Style} obj\n * A style function, a single style, or an array of styles.\n * @return {module:ol/style/Style~StyleFunction} A style function.\n */\nexport function toFunction(obj) {\n let styleFunction;\n\n if (typeof obj === 'function') {\n styleFunction = obj;\n } else {\n /**\n * @type {Array.<module:ol/style/Style>}\n */\n let styles;\n if (Array.isArray(obj)) {\n styles = obj;\n } else {\n assert(obj instanceof Style,\n 41); // Expected an `module:ol/style/Style~Style` or an array of `module:ol/style/Style~Style`\n styles = [obj];\n }\n styleFunction = function() {\n return styles;\n };\n }\n return styleFunction;\n}\n\n\n/**\n * @type {Array.<module:ol/style/Style>}\n */\nlet defaultStyles = null;\n\n\n/**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @param {number} resolution Resolution.\n * @return {Array.<module:ol/style/Style>} Style.\n */\nexport function createDefaultStyle(feature, resolution) {\n // We don't use an immediately-invoked function\n // and a closure so we don't get an error at script evaluation time in\n // browsers that do not support Canvas. (module:ol/style/Circle~CircleStyle does\n // canvas.getContext('2d') at construction time, which will cause an.error\n // in such browsers.)\n if (!defaultStyles) {\n const fill = new Fill({\n color: 'rgba(255,255,255,0.4)'\n });\n const stroke = new Stroke({\n color: '#3399CC',\n width: 1.25\n });\n defaultStyles = [\n new Style({\n image: new CircleStyle({\n fill: fill,\n stroke: stroke,\n radius: 5\n }),\n fill: fill,\n stroke: stroke\n })\n ];\n }\n return defaultStyles;\n}\n\n\n/**\n * Default styles for editing features.\n * @return {Object.<module:ol/geom/GeometryType, Array.<module:ol/style/Style>>} Styles\n */\nexport function createEditingStyle() {\n /** @type {Object.<module:ol/geom/GeometryType, Array.<module:ol/style/Style>>} */\n const styles = {};\n const white = [255, 255, 255, 1];\n const blue = [0, 153, 255, 1];\n const width = 3;\n styles[GeometryType.POLYGON] = [\n new Style({\n fill: new Fill({\n color: [255, 255, 255, 0.5]\n })\n })\n ];\n styles[GeometryType.MULTI_POLYGON] =\n styles[GeometryType.POLYGON];\n\n styles[GeometryType.LINE_STRING] = [\n new Style({\n stroke: new Stroke({\n color: white,\n width: width + 2\n })\n }),\n new Style({\n stroke: new Stroke({\n color: blue,\n width: width\n })\n })\n ];\n styles[GeometryType.MULTI_LINE_STRING] =\n styles[GeometryType.LINE_STRING];\n\n styles[GeometryType.CIRCLE] =\n styles[GeometryType.POLYGON].concat(\n styles[GeometryType.LINE_STRING]\n );\n\n\n styles[GeometryType.POINT] = [\n new Style({\n image: new CircleStyle({\n radius: width * 2,\n fill: new Fill({\n color: blue\n }),\n stroke: new Stroke({\n color: white,\n width: width / 2\n })\n }),\n zIndex: Infinity\n })\n ];\n styles[GeometryType.MULTI_POINT] =\n styles[GeometryType.POINT];\n\n styles[GeometryType.GEOMETRY_COLLECTION] =\n styles[GeometryType.POLYGON].concat(\n styles[GeometryType.LINE_STRING],\n styles[GeometryType.POINT]\n );\n\n return styles;\n}\n\n\n/**\n * Function that is called with a feature and returns its default geometry.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature to get the geometry for.\n * @return {module:ol/geom/Geometry|module:ol/render/Feature|undefined} Geometry to render.\n */\nfunction defaultGeometryFunction(feature) {\n return feature.getGeometry();\n}\n\nexport default Style;\n","/**\n * @module ol/Feature\n */\nimport {assert} from './asserts.js';\nimport {listen, unlisten, unlistenByKey} from './events.js';\nimport EventType from './events/EventType.js';\nimport {inherits} from './util.js';\nimport BaseObject, {getChangeEventType} from './Object.js';\nimport Geometry from './geom/Geometry.js';\nimport Style from './style/Style.js';\n\n/**\n * @classdesc\n * A vector object for geographic features with a geometry and other\n * attribute properties, similar to the features in vector file formats like\n * GeoJSON.\n *\n * Features can be styled individually with `setStyle`; otherwise they use the\n * style of their vector layer.\n *\n * Note that attribute properties are set as {@link module:ol/Object} properties on\n * the feature object, so they are observable, and have get/set accessors.\n *\n * Typically, a feature has a single geometry property. You can set the\n * geometry using the `setGeometry` method and get it with `getGeometry`.\n * It is possible to store more than one geometry on a feature using attribute\n * properties. By default, the geometry used for rendering is identified by\n * the property name `geometry`. If you want to use another geometry property\n * for rendering, use the `setGeometryName` method to change the attribute\n * property associated with the geometry for the feature. For example:\n *\n * ```js\n *\n * import Feature from 'ol/Feature';\n * import Polygon from 'ol/geom/Polygon';\n * import Point from 'ol/geom/Point';\n *\n * var feature = new Feature({\n * geometry: new Polygon(polyCoords),\n * labelPoint: new Point(labelCoords),\n * name: 'My Polygon'\n * });\n *\n * // get the polygon geometry\n * var poly = feature.getGeometry();\n *\n * // Render the feature as a point using the coordinates from labelPoint\n * feature.setGeometryName('labelPoint');\n *\n * // get the point geometry\n * var point = feature.getGeometry();\n * ```\n *\n * @constructor\n * @extends {module:ol/Object}\n * @param {module:ol/geom/Geometry|Object.<string, *>=} opt_geometryOrProperties\n * You may pass a Geometry object directly, or an object literal containing\n * properties. If you pass an object literal, you may include a Geometry\n * associated with a `geometry` key.\n * @api\n */\nconst Feature = function(opt_geometryOrProperties) {\n\n BaseObject.call(this);\n\n /**\n * @private\n * @type {number|string|undefined}\n */\n this.id_ = undefined;\n\n /**\n * @type {string}\n * @private\n */\n this.geometryName_ = 'geometry';\n\n /**\n * User provided style.\n * @private\n * @type {module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction}\n */\n this.style_ = null;\n\n /**\n * @private\n * @type {module:ol/style/Style~StyleFunction|undefined}\n */\n this.styleFunction_ = undefined;\n\n /**\n * @private\n * @type {?module:ol/events~EventsKey}\n */\n this.geometryChangeKey_ = null;\n\n listen(\n this, getChangeEventType(this.geometryName_),\n this.handleGeometryChanged_, this);\n\n if (opt_geometryOrProperties !== undefined) {\n if (opt_geometryOrProperties instanceof Geometry ||\n !opt_geometryOrProperties) {\n const geometry = opt_geometryOrProperties;\n this.setGeometry(geometry);\n } else {\n /** @type {Object.<string, *>} */\n const properties = opt_geometryOrProperties;\n this.setProperties(properties);\n }\n }\n};\n\ninherits(Feature, BaseObject);\n\n\n/**\n * Clone this feature. If the original feature has a geometry it\n * is also cloned. The feature id is not set in the clone.\n * @return {module:ol/Feature} The clone.\n * @api\n */\nFeature.prototype.clone = function() {\n const clone = new Feature(this.getProperties());\n clone.setGeometryName(this.getGeometryName());\n const geometry = this.getGeometry();\n if (geometry) {\n clone.setGeometry(geometry.clone());\n }\n const style = this.getStyle();\n if (style) {\n clone.setStyle(style);\n }\n return clone;\n};\n\n\n/**\n * Get the feature's default geometry. A feature may have any number of named\n * geometries. The \"default\" geometry (the one that is rendered by default) is\n * set when calling {@link module:ol/Feature~Feature#setGeometry}.\n * @return {module:ol/geom/Geometry|undefined} The default geometry for the feature.\n * @api\n * @observable\n */\nFeature.prototype.getGeometry = function() {\n return (\n /** @type {module:ol/geom/Geometry|undefined} */ (this.get(this.geometryName_))\n );\n};\n\n\n/**\n * Get the feature identifier. This is a stable identifier for the feature and\n * is either set when reading data from a remote source or set explicitly by\n * calling {@link module:ol/Feature~Feature#setId}.\n * @return {number|string|undefined} Id.\n * @api\n */\nFeature.prototype.getId = function() {\n return this.id_;\n};\n\n\n/**\n * Get the name of the feature's default geometry. By default, the default\n * geometry is named `geometry`.\n * @return {string} Get the property name associated with the default geometry\n * for this feature.\n * @api\n */\nFeature.prototype.getGeometryName = function() {\n return this.geometryName_;\n};\n\n\n/**\n * Get the feature's style. Will return what was provided to the\n * {@link module:ol/Feature~Feature#setStyle} method.\n * @return {module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction} The feature style.\n * @api\n */\nFeature.prototype.getStyle = function() {\n return this.style_;\n};\n\n\n/**\n * Get the feature's style function.\n * @return {module:ol/style/Style~StyleFunction|undefined} Return a function\n * representing the current style of this feature.\n * @api\n */\nFeature.prototype.getStyleFunction = function() {\n return this.styleFunction_;\n};\n\n\n/**\n * @private\n */\nFeature.prototype.handleGeometryChange_ = function() {\n this.changed();\n};\n\n\n/**\n * @private\n */\nFeature.prototype.handleGeometryChanged_ = function() {\n if (this.geometryChangeKey_) {\n unlistenByKey(this.geometryChangeKey_);\n this.geometryChangeKey_ = null;\n }\n const geometry = this.getGeometry();\n if (geometry) {\n this.geometryChangeKey_ = listen(geometry,\n EventType.CHANGE, this.handleGeometryChange_, this);\n }\n this.changed();\n};\n\n\n/**\n * Set the default geometry for the feature. This will update the property\n * with the name returned by {@link module:ol/Feature~Feature#getGeometryName}.\n * @param {module:ol/geom/Geometry|undefined} geometry The new geometry.\n * @api\n * @observable\n */\nFeature.prototype.setGeometry = function(geometry) {\n this.set(this.geometryName_, geometry);\n};\n\n\n/**\n * Set the style for the feature. This can be a single style object, an array\n * of styles, or a function that takes a resolution and returns an array of\n * styles. If it is `null` the feature has no style (a `null` style).\n * @param {module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction} style Style for this feature.\n * @api\n * @fires module:ol/events/Event~Event#event:change\n */\nFeature.prototype.setStyle = function(style) {\n this.style_ = style;\n this.styleFunction_ = !style ? undefined : createStyleFunction(style);\n this.changed();\n};\n\n\n/**\n * Set the feature id. The feature id is considered stable and may be used when\n * requesting features or comparing identifiers returned from a remote source.\n * The feature id can be used with the\n * {@link module:ol/source/Vector~VectorSource#getFeatureById} method.\n * @param {number|string|undefined} id The feature id.\n * @api\n * @fires module:ol/events/Event~Event#event:change\n */\nFeature.prototype.setId = function(id) {\n this.id_ = id;\n this.changed();\n};\n\n\n/**\n * Set the property name to be used when getting the feature's default geometry.\n * When calling {@link module:ol/Feature~Feature#getGeometry}, the value of the property with\n * this name will be returned.\n * @param {string} name The property name of the default geometry.\n * @api\n */\nFeature.prototype.setGeometryName = function(name) {\n unlisten(\n this, getChangeEventType(this.geometryName_),\n this.handleGeometryChanged_, this);\n this.geometryName_ = name;\n listen(\n this, getChangeEventType(this.geometryName_),\n this.handleGeometryChanged_, this);\n this.handleGeometryChanged_();\n};\n\n\n/**\n * Convert the provided object into a feature style function. Functions passed\n * through unchanged. Arrays of module:ol/style/Style or single style objects wrapped\n * in a new feature style function.\n * @param {module:ol/style/Style~StyleFunction|!Array.<module:ol/style/Style>|!module:ol/style/Style} obj\n * A feature style function, a single style, or an array of styles.\n * @return {module:ol/style/Style~StyleFunction} A style function.\n */\nexport function createStyleFunction(obj) {\n if (typeof obj === 'function') {\n return obj;\n } else {\n /**\n * @type {Array.<module:ol/style/Style>}\n */\n let styles;\n if (Array.isArray(obj)) {\n styles = obj;\n } else {\n assert(obj instanceof Style,\n 41); // Expected an `module:ol/style/Style~Style` or an array of `module:ol/style/Style~Style`\n styles = [obj];\n }\n return function() {\n return styles;\n };\n }\n}\nexport default Feature;\n","/**\n * @module ol/GeolocationProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n ACCURACY: 'accuracy',\n ACCURACY_GEOMETRY: 'accuracyGeometry',\n ALTITUDE: 'altitude',\n ALTITUDE_ACCURACY: 'altitudeAccuracy',\n HEADING: 'heading',\n POSITION: 'position',\n PROJECTION: 'projection',\n SPEED: 'speed',\n TRACKING: 'tracking',\n TRACKING_OPTIONS: 'trackingOptions'\n};\n","/**\n * @module ol/array\n */\n\n\n/**\n * Performs a binary search on the provided sorted list and returns the index of the item if found. If it can't be found it'll return -1.\n * https://github.com/darkskyapp/binary-search\n *\n * @param {Array.<*>} haystack Items to search through.\n * @param {*} needle The item to look for.\n * @param {Function=} opt_comparator Comparator function.\n * @return {number} The index of the item if found, -1 if not.\n */\nexport function binarySearch(haystack, needle, opt_comparator) {\n let mid, cmp;\n const comparator = opt_comparator || numberSafeCompareFunction;\n let low = 0;\n let high = haystack.length;\n let found = false;\n\n while (low < high) {\n /* Note that \"(low + high) >>> 1\" may overflow, and results in a typecast\n * to double (which gives the wrong results). */\n mid = low + (high - low >> 1);\n cmp = +comparator(haystack[mid], needle);\n\n if (cmp < 0.0) { /* Too low. */\n low = mid + 1;\n\n } else { /* Key found or too high */\n high = mid;\n found = !cmp;\n }\n }\n\n /* Key not found. */\n return found ? low : ~low;\n}\n\n\n/**\n * Compare function for array sort that is safe for numbers.\n * @param {*} a The first object to be compared.\n * @param {*} b The second object to be compared.\n * @return {number} A negative number, zero, or a positive number as the first\n * argument is less than, equal to, or greater than the second.\n */\nexport function numberSafeCompareFunction(a, b) {\n return a > b ? 1 : a < b ? -1 : 0;\n}\n\n\n/**\n * Whether the array contains the given object.\n * @param {Array.<*>} arr The array to test for the presence of the element.\n * @param {*} obj The object for which to test.\n * @return {boolean} The object is in the array.\n */\nexport function includes(arr, obj) {\n return arr.indexOf(obj) >= 0;\n}\n\n\n/**\n * @param {Array.<number>} arr Array.\n * @param {number} target Target.\n * @param {number} direction 0 means return the nearest, > 0\n * means return the largest nearest, < 0 means return the\n * smallest nearest.\n * @return {number} Index.\n */\nexport function linearFindNearest(arr, target, direction) {\n const n = arr.length;\n if (arr[0] <= target) {\n return 0;\n } else if (target <= arr[n - 1]) {\n return n - 1;\n } else {\n let i;\n if (direction > 0) {\n for (i = 1; i < n; ++i) {\n if (arr[i] < target) {\n return i - 1;\n }\n }\n } else if (direction < 0) {\n for (i = 1; i < n; ++i) {\n if (arr[i] <= target) {\n return i;\n }\n }\n } else {\n for (i = 1; i < n; ++i) {\n if (arr[i] == target) {\n return i;\n } else if (arr[i] < target) {\n if (arr[i - 1] - target < target - arr[i]) {\n return i - 1;\n } else {\n return i;\n }\n }\n }\n }\n return n - 1;\n }\n}\n\n\n/**\n * @param {Array.<*>} arr Array.\n * @param {number} begin Begin index.\n * @param {number} end End index.\n */\nexport function reverseSubArray(arr, begin, end) {\n while (begin < end) {\n const tmp = arr[begin];\n arr[begin] = arr[end];\n arr[end] = tmp;\n ++begin;\n --end;\n }\n}\n\n\n/**\n * @param {Array.<VALUE>} arr The array to modify.\n * @param {!Array.<VALUE>|VALUE} data The elements or arrays of elements to add to arr.\n * @template VALUE\n */\nexport function extend(arr, data) {\n const extension = Array.isArray(data) ? data : [data];\n const length = extension.length;\n for (let i = 0; i < length; i++) {\n arr[arr.length] = extension[i];\n }\n}\n\n\n/**\n * @param {Array.<VALUE>} arr The array to modify.\n * @param {VALUE} obj The element to remove.\n * @template VALUE\n * @return {boolean} If the element was removed.\n */\nexport function remove(arr, obj) {\n const i = arr.indexOf(obj);\n const found = i > -1;\n if (found) {\n arr.splice(i, 1);\n }\n return found;\n}\n\n\n/**\n * @param {Array.<VALUE>} arr The array to search in.\n * @param {function(VALUE, number, ?) : boolean} func The function to compare.\n * @template VALUE\n * @return {VALUE|null} The element found or null.\n */\nexport function find(arr, func) {\n const length = arr.length >>> 0;\n let value;\n\n for (let i = 0; i < length; i++) {\n value = arr[i];\n if (func(value, i, arr)) {\n return value;\n }\n }\n return null;\n}\n\n\n/**\n * @param {Array|Uint8ClampedArray} arr1 The first array to compare.\n * @param {Array|Uint8ClampedArray} arr2 The second array to compare.\n * @return {boolean} Whether the two arrays are equal.\n */\nexport function equals(arr1, arr2) {\n const len1 = arr1.length;\n if (len1 !== arr2.length) {\n return false;\n }\n for (let i = 0; i < len1; i++) {\n if (arr1[i] !== arr2[i]) {\n return false;\n }\n }\n return true;\n}\n\n\n/**\n * @param {Array.<*>} arr The array to sort (modifies original).\n * @param {Function} compareFnc Comparison function.\n */\nexport function stableSort(arr, compareFnc) {\n const length = arr.length;\n const tmp = Array(arr.length);\n let i;\n for (i = 0; i < length; i++) {\n tmp[i] = {index: i, value: arr[i]};\n }\n tmp.sort(function(a, b) {\n return compareFnc(a.value, b.value) || a.index - b.index;\n });\n for (i = 0; i < arr.length; i++) {\n arr[i] = tmp[i].value;\n }\n}\n\n\n/**\n * @param {Array.<*>} arr The array to search in.\n * @param {Function} func Comparison function.\n * @return {number} Return index.\n */\nexport function findIndex(arr, func) {\n let index;\n const found = !arr.every(function(el, idx) {\n index = idx;\n return !func(el, idx, arr);\n });\n return found ? index : -1;\n}\n\n\n/**\n * @param {Array.<*>} arr The array to test.\n * @param {Function=} opt_func Comparison function.\n * @param {boolean=} opt_strict Strictly sorted (default false).\n * @return {boolean} Return index.\n */\nexport function isSorted(arr, opt_func, opt_strict) {\n const compare = opt_func || numberSafeCompareFunction;\n return arr.every(function(currentVal, index) {\n if (index === 0) {\n return true;\n }\n const res = compare(arr[index - 1], currentVal);\n return !(res > 0 || opt_strict && res === 0);\n });\n}\n","/**\n * @module ol/geom/GeometryLayout\n */\n\n/**\n * The coordinate layout for geometries, indicating whether a 3rd or 4th z ('Z')\n * or measure ('M') coordinate is available. Supported values are `'XY'`,\n * `'XYZ'`, `'XYM'`, `'XYZM'`.\n * @enum {string}\n */\nexport default {\n XY: 'XY',\n XYZ: 'XYZ',\n XYM: 'XYM',\n XYZM: 'XYZM'\n};\n","/**\n * @module ol/geom/SimpleGeometry\n */\nimport {inherits} from '../util.js';\nimport {FALSE} from '../functions.js';\nimport {createOrUpdateFromFlatCoordinates, getCenter} from '../extent.js';\nimport Geometry from '../geom/Geometry.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport {rotate, scale, translate, transform2D} from '../geom/flat/transform.js';\nimport {clear} from '../obj.js';\n\n/**\n * @classdesc\n * Abstract base class; only used for creating subclasses; do not instantiate\n * in apps, as cannot be rendered.\n *\n * @constructor\n * @abstract\n * @extends {module:ol/geom/Geometry}\n * @api\n */\nconst SimpleGeometry = function() {\n\n Geometry.call(this);\n\n /**\n * @protected\n * @type {module:ol/geom/GeometryLayout}\n */\n this.layout = GeometryLayout.XY;\n\n /**\n * @protected\n * @type {number}\n */\n this.stride = 2;\n\n /**\n * @protected\n * @type {Array.<number>}\n */\n this.flatCoordinates = null;\n\n};\n\ninherits(SimpleGeometry, Geometry);\n\n\n/**\n * @param {number} stride Stride.\n * @return {module:ol/geom/GeometryLayout} layout Layout.\n */\nfunction getLayoutForStride(stride) {\n let layout;\n if (stride == 2) {\n layout = GeometryLayout.XY;\n } else if (stride == 3) {\n layout = GeometryLayout.XYZ;\n } else if (stride == 4) {\n layout = GeometryLayout.XYZM;\n }\n return (\n /** @type {module:ol/geom/GeometryLayout} */ (layout)\n );\n}\n\n\n/**\n * @param {module:ol/geom/GeometryLayout} layout Layout.\n * @return {number} Stride.\n */\nexport function getStrideForLayout(layout) {\n let stride;\n if (layout == GeometryLayout.XY) {\n stride = 2;\n } else if (layout == GeometryLayout.XYZ || layout == GeometryLayout.XYM) {\n stride = 3;\n } else if (layout == GeometryLayout.XYZM) {\n stride = 4;\n }\n return /** @type {number} */ (stride);\n}\n\n\n/**\n * @inheritDoc\n */\nSimpleGeometry.prototype.containsXY = FALSE;\n\n\n/**\n * @inheritDoc\n */\nSimpleGeometry.prototype.computeExtent = function(extent) {\n return createOrUpdateFromFlatCoordinates(this.flatCoordinates,\n 0, this.flatCoordinates.length, this.stride, extent);\n};\n\n\n/**\n * @abstract\n * @return {Array} Coordinates.\n */\nSimpleGeometry.prototype.getCoordinates = function() {};\n\n\n/**\n * Return the first coordinate of the geometry.\n * @return {module:ol/coordinate~Coordinate} First coordinate.\n * @api\n */\nSimpleGeometry.prototype.getFirstCoordinate = function() {\n return this.flatCoordinates.slice(0, this.stride);\n};\n\n\n/**\n * @return {Array.<number>} Flat coordinates.\n */\nSimpleGeometry.prototype.getFlatCoordinates = function() {\n return this.flatCoordinates;\n};\n\n\n/**\n * Return the last coordinate of the geometry.\n * @return {module:ol/coordinate~Coordinate} Last point.\n * @api\n */\nSimpleGeometry.prototype.getLastCoordinate = function() {\n return this.flatCoordinates.slice(this.flatCoordinates.length - this.stride);\n};\n\n\n/**\n * Return the {@link module:ol/geom/GeometryLayout~GeometryLayout layout} of the geometry.\n * @return {module:ol/geom/GeometryLayout} Layout.\n * @api\n */\nSimpleGeometry.prototype.getLayout = function() {\n return this.layout;\n};\n\n\n/**\n * @inheritDoc\n */\nSimpleGeometry.prototype.getSimplifiedGeometry = function(squaredTolerance) {\n if (this.simplifiedGeometryRevision != this.getRevision()) {\n clear(this.simplifiedGeometryCache);\n this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n this.simplifiedGeometryRevision = this.getRevision();\n }\n // If squaredTolerance is negative or if we know that simplification will not\n // have any effect then just return this.\n if (squaredTolerance < 0 ||\n (this.simplifiedGeometryMaxMinSquaredTolerance !== 0 &&\n squaredTolerance <= this.simplifiedGeometryMaxMinSquaredTolerance)) {\n return this;\n }\n const key = squaredTolerance.toString();\n if (this.simplifiedGeometryCache.hasOwnProperty(key)) {\n return this.simplifiedGeometryCache[key];\n } else {\n const simplifiedGeometry =\n this.getSimplifiedGeometryInternal(squaredTolerance);\n const simplifiedFlatCoordinates = simplifiedGeometry.getFlatCoordinates();\n if (simplifiedFlatCoordinates.length < this.flatCoordinates.length) {\n this.simplifiedGeometryCache[key] = simplifiedGeometry;\n return simplifiedGeometry;\n } else {\n // Simplification did not actually remove any coordinates. We now know\n // that any calls to getSimplifiedGeometry with a squaredTolerance less\n // than or equal to the current squaredTolerance will also not have any\n // effect. This allows us to short circuit simplification (saving CPU\n // cycles) and prevents the cache of simplified geometries from filling\n // up with useless identical copies of this geometry (saving memory).\n this.simplifiedGeometryMaxMinSquaredTolerance = squaredTolerance;\n return this;\n }\n }\n};\n\n\n/**\n * @param {number} squaredTolerance Squared tolerance.\n * @return {module:ol/geom/SimpleGeometry} Simplified geometry.\n * @protected\n */\nSimpleGeometry.prototype.getSimplifiedGeometryInternal = function(squaredTolerance) {\n return this;\n};\n\n\n/**\n * @return {number} Stride.\n */\nSimpleGeometry.prototype.getStride = function() {\n return this.stride;\n};\n\n\n/**\n * @param {module:ol/geom/GeometryLayout} layout Layout.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @protected\n */\nSimpleGeometry.prototype.setFlatCoordinatesInternal = function(layout, flatCoordinates) {\n this.stride = getStrideForLayout(layout);\n this.layout = layout;\n this.flatCoordinates = flatCoordinates;\n};\n\n\n/**\n * @abstract\n * @param {Array} coordinates Coordinates.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n */\nSimpleGeometry.prototype.setCoordinates = function(coordinates, opt_layout) {};\n\n\n/**\n * @param {module:ol/geom/GeometryLayout|undefined} layout Layout.\n * @param {Array} coordinates Coordinates.\n * @param {number} nesting Nesting.\n * @protected\n */\nSimpleGeometry.prototype.setLayout = function(layout, coordinates, nesting) {\n /** @type {number} */\n let stride;\n if (layout) {\n stride = getStrideForLayout(layout);\n } else {\n for (let i = 0; i < nesting; ++i) {\n if (coordinates.length === 0) {\n this.layout = GeometryLayout.XY;\n this.stride = 2;\n return;\n } else {\n coordinates = /** @type {Array} */ (coordinates[0]);\n }\n }\n stride = coordinates.length;\n layout = getLayoutForStride(stride);\n }\n this.layout = layout;\n this.stride = stride;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nSimpleGeometry.prototype.applyTransform = function(transformFn) {\n if (this.flatCoordinates) {\n transformFn(this.flatCoordinates, this.flatCoordinates, this.stride);\n this.changed();\n }\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nSimpleGeometry.prototype.rotate = function(angle, anchor) {\n const flatCoordinates = this.getFlatCoordinates();\n if (flatCoordinates) {\n const stride = this.getStride();\n rotate(\n flatCoordinates, 0, flatCoordinates.length,\n stride, angle, anchor, flatCoordinates);\n this.changed();\n }\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nSimpleGeometry.prototype.scale = function(sx, opt_sy, opt_anchor) {\n let sy = opt_sy;\n if (sy === undefined) {\n sy = sx;\n }\n let anchor = opt_anchor;\n if (!anchor) {\n anchor = getCenter(this.getExtent());\n }\n const flatCoordinates = this.getFlatCoordinates();\n if (flatCoordinates) {\n const stride = this.getStride();\n scale(\n flatCoordinates, 0, flatCoordinates.length,\n stride, sx, sy, anchor, flatCoordinates);\n this.changed();\n }\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nSimpleGeometry.prototype.translate = function(deltaX, deltaY) {\n const flatCoordinates = this.getFlatCoordinates();\n if (flatCoordinates) {\n const stride = this.getStride();\n translate(\n flatCoordinates, 0, flatCoordinates.length, stride,\n deltaX, deltaY, flatCoordinates);\n this.changed();\n }\n};\n\n\n/**\n * @param {module:ol/geom/SimpleGeometry} simpleGeometry Simple geometry.\n * @param {module:ol/transform~Transform} transform Transform.\n * @param {Array.<number>=} opt_dest Destination.\n * @return {Array.<number>} Transformed flat coordinates.\n */\nexport function transformGeom2D(simpleGeometry, transform, opt_dest) {\n const flatCoordinates = simpleGeometry.getFlatCoordinates();\n if (!flatCoordinates) {\n return null;\n } else {\n const stride = simpleGeometry.getStride();\n return transform2D(\n flatCoordinates, 0, flatCoordinates.length, stride,\n transform, opt_dest);\n }\n}\n\nexport default SimpleGeometry;\n","/**\n * @module ol/geom/flat/area\n */\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRing(flatCoordinates, offset, end, stride) {\n let twiceArea = 0;\n let x1 = flatCoordinates[end - stride];\n let y1 = flatCoordinates[end - stride + 1];\n for (; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n twiceArea += y1 * x2 - x1 * y2;\n x1 = x2;\n y1 = y2;\n }\n return twiceArea / 2;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRings(flatCoordinates, offset, ends, stride) {\n let area = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n area += linearRing(flatCoordinates, offset, end, stride);\n offset = end;\n }\n return area;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<number>>} endss Endss.\n * @param {number} stride Stride.\n * @return {number} Area.\n */\nexport function linearRingss(flatCoordinates, offset, endss, stride) {\n let area = 0;\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n area += linearRings(flatCoordinates, offset, ends, stride);\n offset = ends[ends.length - 1];\n }\n return area;\n}\n","/**\n * @module ol/geom/flat/closest\n */\nimport {lerp, squaredDistance as squaredDx} from '../../math.js';\n\n\n/**\n * Returns the point on the 2D line segment flatCoordinates[offset1] to\n * flatCoordinates[offset2] that is closest to the point (x, y). Extra\n * dimensions are linearly interpolated.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset1 Offset 1.\n * @param {number} offset2 Offset 2.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array.<number>} closestPoint Closest point.\n */\nfunction assignClosest(flatCoordinates, offset1, offset2, stride, x, y, closestPoint) {\n const x1 = flatCoordinates[offset1];\n const y1 = flatCoordinates[offset1 + 1];\n const dx = flatCoordinates[offset2] - x1;\n const dy = flatCoordinates[offset2 + 1] - y1;\n let offset;\n if (dx === 0 && dy === 0) {\n offset = offset1;\n } else {\n const t = ((x - x1) * dx + (y - y1) * dy) / (dx * dx + dy * dy);\n if (t > 1) {\n offset = offset2;\n } else if (t > 0) {\n for (let i = 0; i < stride; ++i) {\n closestPoint[i] = lerp(flatCoordinates[offset1 + i],\n flatCoordinates[offset2 + i], t);\n }\n closestPoint.length = stride;\n return;\n } else {\n offset = offset1;\n }\n }\n for (let i = 0; i < stride; ++i) {\n closestPoint[i] = flatCoordinates[offset + i];\n }\n closestPoint.length = stride;\n}\n\n\n/**\n * Return the squared of the largest distance between any pair of consecutive\n * coordinates.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function maxSquaredDelta(flatCoordinates, offset, end, stride, max) {\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n for (offset += stride; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n const squaredDelta = squaredDx(x1, y1, x2, y2);\n if (squaredDelta > max) {\n max = squaredDelta;\n }\n x1 = x2;\n y1 = y2;\n }\n return max;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function arrayMaxSquaredDelta(flatCoordinates, offset, ends, stride, max) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n max = maxSquaredDelta(\n flatCoordinates, offset, end, stride, max);\n offset = end;\n }\n return max;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} max Max squared delta.\n * @return {number} Max squared delta.\n */\nexport function multiArrayMaxSquaredDelta(flatCoordinates, offset, endss, stride, max) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n max = arrayMaxSquaredDelta(\n flatCoordinates, offset, ends, stride, max);\n offset = ends[ends.length - 1];\n }\n return max;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array.<number>} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array.<number>=} opt_tmpPoint Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestPoint(flatCoordinates, offset, end,\n stride, maxDelta, isRing, x, y, closestPoint, minSquaredDistance,\n opt_tmpPoint) {\n if (offset == end) {\n return minSquaredDistance;\n }\n let i, squaredDistance;\n if (maxDelta === 0) {\n // All points are identical, so just test the first point.\n squaredDistance = squaredDx(\n x, y, flatCoordinates[offset], flatCoordinates[offset + 1]);\n if (squaredDistance < minSquaredDistance) {\n for (i = 0; i < stride; ++i) {\n closestPoint[i] = flatCoordinates[offset + i];\n }\n closestPoint.length = stride;\n return squaredDistance;\n } else {\n return minSquaredDistance;\n }\n }\n const tmpPoint = opt_tmpPoint ? opt_tmpPoint : [NaN, NaN];\n let index = offset + stride;\n while (index < end) {\n assignClosest(\n flatCoordinates, index - stride, index, stride, x, y, tmpPoint);\n squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n if (squaredDistance < minSquaredDistance) {\n minSquaredDistance = squaredDistance;\n for (i = 0; i < stride; ++i) {\n closestPoint[i] = tmpPoint[i];\n }\n closestPoint.length = stride;\n index += stride;\n } else {\n // Skip ahead multiple points, because we know that all the skipped\n // points cannot be any closer than the closest point we have found so\n // far. We know this because we know how close the current point is, how\n // close the closest point we have found so far is, and the maximum\n // distance between consecutive points. For example, if we're currently\n // at distance 10, the best we've found so far is 3, and that the maximum\n // distance between consecutive points is 2, then we'll need to skip at\n // least (10 - 3) / 2 == 3 (rounded down) points to have any chance of\n // finding a closer point. We use Math.max(..., 1) to ensure that we\n // always advance at least one point, to avoid an infinite loop.\n index += stride * Math.max(\n ((Math.sqrt(squaredDistance) -\n Math.sqrt(minSquaredDistance)) / maxDelta) | 0, 1);\n }\n }\n if (isRing) {\n // Check the closing segment.\n assignClosest(\n flatCoordinates, end - stride, offset, stride, x, y, tmpPoint);\n squaredDistance = squaredDx(x, y, tmpPoint[0], tmpPoint[1]);\n if (squaredDistance < minSquaredDistance) {\n minSquaredDistance = squaredDistance;\n for (i = 0; i < stride; ++i) {\n closestPoint[i] = tmpPoint[i];\n }\n closestPoint.length = stride;\n }\n }\n return minSquaredDistance;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array.<number>} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array.<number>=} opt_tmpPoint Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestArrayPoint(flatCoordinates, offset, ends,\n stride, maxDelta, isRing, x, y, closestPoint, minSquaredDistance,\n opt_tmpPoint) {\n const tmpPoint = opt_tmpPoint ? opt_tmpPoint : [NaN, NaN];\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n minSquaredDistance = assignClosestPoint(\n flatCoordinates, offset, end, stride,\n maxDelta, isRing, x, y, closestPoint, minSquaredDistance, tmpPoint);\n offset = end;\n }\n return minSquaredDistance;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} maxDelta Max delta.\n * @param {boolean} isRing Is ring.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {Array.<number>} closestPoint Closest point.\n * @param {number} minSquaredDistance Minimum squared distance.\n * @param {Array.<number>=} opt_tmpPoint Temporary point object.\n * @return {number} Minimum squared distance.\n */\nexport function assignClosestMultiArrayPoint(flatCoordinates, offset,\n endss, stride, maxDelta, isRing, x, y, closestPoint, minSquaredDistance,\n opt_tmpPoint) {\n const tmpPoint = opt_tmpPoint ? opt_tmpPoint : [NaN, NaN];\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n minSquaredDistance = assignClosestArrayPoint(\n flatCoordinates, offset, ends, stride,\n maxDelta, isRing, x, y, closestPoint, minSquaredDistance, tmpPoint);\n offset = ends[ends.length - 1];\n }\n return minSquaredDistance;\n}\n","/**\n * @module ol/geom/flat/deflate\n */\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinate(flatCoordinates, offset, coordinate, stride) {\n for (let i = 0, ii = coordinate.length; i < ii; ++i) {\n flatCoordinates[offset++] = coordinate[i];\n }\n return offset;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<module:ol/coordinate~Coordinate>} coordinates Coordinates.\n * @param {number} stride Stride.\n * @return {number} offset Offset.\n */\nexport function deflateCoordinates(flatCoordinates, offset, coordinates, stride) {\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n const coordinate = coordinates[i];\n for (let j = 0; j < stride; ++j) {\n flatCoordinates[offset++] = coordinate[j];\n }\n }\n return offset;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} coordinatess Coordinatess.\n * @param {number} stride Stride.\n * @param {Array.<number>=} opt_ends Ends.\n * @return {Array.<number>} Ends.\n */\nexport function deflateCoordinatesArray(flatCoordinates, offset, coordinatess, stride, opt_ends) {\n const ends = opt_ends ? opt_ends : [];\n let i = 0;\n for (let j = 0, jj = coordinatess.length; j < jj; ++j) {\n const end = deflateCoordinates(\n flatCoordinates, offset, coordinatess[j], stride);\n ends[i++] = end;\n offset = end;\n }\n ends.length = i;\n return ends;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<Array.<module:ol/coordinate~Coordinate>>>} coordinatesss Coordinatesss.\n * @param {number} stride Stride.\n * @param {Array.<Array.<number>>=} opt_endss Endss.\n * @return {Array.<Array.<number>>} Endss.\n */\nexport function deflateMultiCoordinatesArray(flatCoordinates, offset, coordinatesss, stride, opt_endss) {\n const endss = opt_endss ? opt_endss : [];\n let i = 0;\n for (let j = 0, jj = coordinatesss.length; j < jj; ++j) {\n const ends = deflateCoordinatesArray(\n flatCoordinates, offset, coordinatesss[j], stride, endss[i]);\n endss[i++] = ends;\n offset = ends[ends.length - 1];\n }\n endss.length = i;\n return endss;\n}\n","/**\n * @module ol/geom/flat/inflate\n */\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Array.<module:ol/coordinate~Coordinate>=} opt_coordinates Coordinates.\n * @return {Array.<module:ol/coordinate~Coordinate>} Coordinates.\n */\nexport function inflateCoordinates(flatCoordinates, offset, end, stride, opt_coordinates) {\n const coordinates = opt_coordinates !== undefined ? opt_coordinates : [];\n let i = 0;\n for (let j = offset; j < end; j += stride) {\n coordinates[i++] = flatCoordinates.slice(j, j + stride);\n }\n coordinates.length = i;\n return coordinates;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>=} opt_coordinatess Coordinatess.\n * @return {Array.<Array.<module:ol/coordinate~Coordinate>>} Coordinatess.\n */\nexport function inflateCoordinatesArray(flatCoordinates, offset, ends, stride, opt_coordinatess) {\n const coordinatess = opt_coordinatess !== undefined ? opt_coordinatess : [];\n let i = 0;\n for (let j = 0, jj = ends.length; j < jj; ++j) {\n const end = ends[j];\n coordinatess[i++] = inflateCoordinates(\n flatCoordinates, offset, end, stride, coordinatess[i]);\n offset = end;\n }\n coordinatess.length = i;\n return coordinatess;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array.<Array.<Array.<module:ol/coordinate~Coordinate>>>=} opt_coordinatesss\n * Coordinatesss.\n * @return {Array.<Array.<Array.<module:ol/coordinate~Coordinate>>>} Coordinatesss.\n */\nexport function inflateMultiCoordinatesArray(flatCoordinates, offset, endss, stride, opt_coordinatesss) {\n const coordinatesss = opt_coordinatesss !== undefined ? opt_coordinatesss : [];\n let i = 0;\n for (let j = 0, jj = endss.length; j < jj; ++j) {\n const ends = endss[j];\n coordinatesss[i++] = inflateCoordinatesArray(\n flatCoordinates, offset, ends, stride, coordinatesss[i]);\n offset = ends[ends.length - 1];\n }\n coordinatesss.length = i;\n return coordinatesss;\n}\n","/**\n * @module ol/geom/flat/simplify\n */\n// Based on simplify-js https://github.com/mourner/simplify-js\n// Copyright (c) 2012, Vladimir Agafonkin\n// All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are met:\n//\n// 1. Redistributions of source code must retain the above copyright notice,\n// this list of conditions and the following disclaimer.\n//\n// 2. Redistributions in binary form must reproduce the above copyright\n// notice, this list of conditions and the following disclaimer in the\n// documentation and/or other materials provided with the distribution.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS \"AS IS\"\n// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\n// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\n// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE\n// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR\n// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF\n// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS\n// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN\n// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)\n// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE\n// POSSIBILITY OF SUCH DAMAGE.\n\nimport {squaredSegmentDistance, squaredDistance} from '../../math.js';\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {boolean} highQuality Highest quality.\n * @param {Array.<number>=} opt_simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @return {Array.<number>} Simplified line string.\n */\nexport function simplifyLineString(flatCoordinates, offset, end,\n stride, squaredTolerance, highQuality, opt_simplifiedFlatCoordinates) {\n const simplifiedFlatCoordinates = opt_simplifiedFlatCoordinates !== undefined ?\n opt_simplifiedFlatCoordinates : [];\n if (!highQuality) {\n end = radialDistance(flatCoordinates, offset, end,\n stride, squaredTolerance,\n simplifiedFlatCoordinates, 0);\n flatCoordinates = simplifiedFlatCoordinates;\n offset = 0;\n stride = 2;\n }\n simplifiedFlatCoordinates.length = douglasPeucker(\n flatCoordinates, offset, end, stride, squaredTolerance,\n simplifiedFlatCoordinates, 0);\n return simplifiedFlatCoordinates;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array.<number>} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function douglasPeucker(flatCoordinates, offset, end,\n stride, squaredTolerance, simplifiedFlatCoordinates, simplifiedOffset) {\n const n = (end - offset) / stride;\n if (n < 3) {\n for (; offset < end; offset += stride) {\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset];\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + 1];\n }\n return simplifiedOffset;\n }\n /** @type {Array.<number>} */\n const markers = new Array(n);\n markers[0] = 1;\n markers[n - 1] = 1;\n /** @type {Array.<number>} */\n const stack = [offset, end - stride];\n let index = 0;\n while (stack.length > 0) {\n const last = stack.pop();\n const first = stack.pop();\n let maxSquaredDistance = 0;\n const x1 = flatCoordinates[first];\n const y1 = flatCoordinates[first + 1];\n const x2 = flatCoordinates[last];\n const y2 = flatCoordinates[last + 1];\n for (let i = first + stride; i < last; i += stride) {\n const x = flatCoordinates[i];\n const y = flatCoordinates[i + 1];\n const squaredDistance = squaredSegmentDistance(\n x, y, x1, y1, x2, y2);\n if (squaredDistance > maxSquaredDistance) {\n index = i;\n maxSquaredDistance = squaredDistance;\n }\n }\n if (maxSquaredDistance > squaredTolerance) {\n markers[(index - offset) / stride] = 1;\n if (first + stride < index) {\n stack.push(first, index);\n }\n if (index + stride < last) {\n stack.push(index, last);\n }\n }\n }\n for (let i = 0; i < n; ++i) {\n if (markers[i]) {\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + i * stride];\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + i * stride + 1];\n }\n }\n return simplifiedOffset;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array.<number>} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array.<number>} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerArray(flatCoordinates, offset,\n ends, stride, squaredTolerance, simplifiedFlatCoordinates,\n simplifiedOffset, simplifiedEnds) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n simplifiedOffset = douglasPeucker(\n flatCoordinates, offset, end, stride, squaredTolerance,\n simplifiedFlatCoordinates, simplifiedOffset);\n simplifiedEnds.push(simplifiedOffset);\n offset = end;\n }\n return simplifiedOffset;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array.<number>} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array.<Array.<number>>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function douglasPeuckerMultiArray(\n flatCoordinates, offset, endss, stride, squaredTolerance,\n simplifiedFlatCoordinates, simplifiedOffset, simplifiedEndss) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n const simplifiedEnds = [];\n simplifiedOffset = douglasPeuckerArray(\n flatCoordinates, offset, ends, stride, squaredTolerance,\n simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds);\n simplifiedEndss.push(simplifiedEnds);\n offset = ends[ends.length - 1];\n }\n return simplifiedOffset;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {Array.<number>} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function radialDistance(flatCoordinates, offset, end,\n stride, squaredTolerance, simplifiedFlatCoordinates, simplifiedOffset) {\n if (end <= offset + stride) {\n // zero or one point, no simplification possible, so copy and return\n for (; offset < end; offset += stride) {\n simplifiedFlatCoordinates[simplifiedOffset++] = flatCoordinates[offset];\n simplifiedFlatCoordinates[simplifiedOffset++] =\n flatCoordinates[offset + 1];\n }\n return simplifiedOffset;\n }\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n // copy first point\n simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n let x2 = x1;\n let y2 = y1;\n for (offset += stride; offset < end; offset += stride) {\n x2 = flatCoordinates[offset];\n y2 = flatCoordinates[offset + 1];\n if (squaredDistance(x1, y1, x2, y2) > squaredTolerance) {\n // copy point at offset\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n x1 = x2;\n y1 = y2;\n }\n }\n if (x2 != x1 || y2 != y1) {\n // copy last point\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n }\n return simplifiedOffset;\n}\n\n\n/**\n * @param {number} value Value.\n * @param {number} tolerance Tolerance.\n * @return {number} Rounded value.\n */\nexport function snap(value, tolerance) {\n return tolerance * Math.round(value / tolerance);\n}\n\n\n/**\n * Simplifies a line string using an algorithm designed by Tim Schaub.\n * Coordinates are snapped to the nearest value in a virtual grid and\n * consecutive duplicate coordinates are discarded. This effectively preserves\n * topology as the simplification of any subsection of a line string is\n * independent of the rest of the line string. This means that, for examples,\n * the common edge between two polygons will be simplified to the same line\n * string independently in both polygons. This implementation uses a single\n * pass over the coordinates and eliminates intermediate collinear points.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array.<number>} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @return {number} Simplified offset.\n */\nexport function quantize(flatCoordinates, offset, end, stride,\n tolerance, simplifiedFlatCoordinates, simplifiedOffset) {\n // do nothing if the line is empty\n if (offset == end) {\n return simplifiedOffset;\n }\n // snap the first coordinate (P1)\n let x1 = snap(flatCoordinates[offset], tolerance);\n let y1 = snap(flatCoordinates[offset + 1], tolerance);\n offset += stride;\n // add the first coordinate to the output\n simplifiedFlatCoordinates[simplifiedOffset++] = x1;\n simplifiedFlatCoordinates[simplifiedOffset++] = y1;\n // find the next coordinate that does not snap to the same value as the first\n // coordinate (P2)\n let x2, y2;\n do {\n x2 = snap(flatCoordinates[offset], tolerance);\n y2 = snap(flatCoordinates[offset + 1], tolerance);\n offset += stride;\n if (offset == end) {\n // all coordinates snap to the same value, the line collapses to a point\n // push the last snapped value anyway to ensure that the output contains\n // at least two points\n // FIXME should we really return at least two points anyway?\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n return simplifiedOffset;\n }\n } while (x2 == x1 && y2 == y1);\n while (offset < end) {\n // snap the next coordinate (P3)\n const x3 = snap(flatCoordinates[offset], tolerance);\n const y3 = snap(flatCoordinates[offset + 1], tolerance);\n offset += stride;\n // skip P3 if it is equal to P2\n if (x3 == x2 && y3 == y2) {\n continue;\n }\n // calculate the delta between P1 and P2\n const dx1 = x2 - x1;\n const dy1 = y2 - y1;\n // calculate the delta between P3 and P1\n const dx2 = x3 - x1;\n const dy2 = y3 - y1;\n // if P1, P2, and P3 are colinear and P3 is further from P1 than P2 is from\n // P1 in the same direction then P2 is on the straight line between P1 and\n // P3\n if ((dx1 * dy2 == dy1 * dx2) &&\n ((dx1 < 0 && dx2 < dx1) || dx1 == dx2 || (dx1 > 0 && dx2 > dx1)) &&\n ((dy1 < 0 && dy2 < dy1) || dy1 == dy2 || (dy1 > 0 && dy2 > dy1))) {\n // discard P2 and set P2 = P3\n x2 = x3;\n y2 = y3;\n continue;\n }\n // either P1, P2, and P3 are not colinear, or they are colinear but P3 is\n // between P3 and P1 or on the opposite half of the line to P2. add P2,\n // and continue with P1 = P2 and P2 = P3\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n x1 = x2;\n y1 = y2;\n x2 = x3;\n y2 = y3;\n }\n // add the last point (P2)\n simplifiedFlatCoordinates[simplifiedOffset++] = x2;\n simplifiedFlatCoordinates[simplifiedOffset++] = y2;\n return simplifiedOffset;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array.<number>} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array.<number>} simplifiedEnds Simplified ends.\n * @return {number} Simplified offset.\n */\nexport function quantizeArray(\n flatCoordinates, offset, ends, stride,\n tolerance,\n simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n simplifiedOffset = quantize(\n flatCoordinates, offset, end, stride,\n tolerance,\n simplifiedFlatCoordinates, simplifiedOffset);\n simplifiedEnds.push(simplifiedOffset);\n offset = end;\n }\n return simplifiedOffset;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} tolerance Tolerance.\n * @param {Array.<number>} simplifiedFlatCoordinates Simplified flat\n * coordinates.\n * @param {number} simplifiedOffset Simplified offset.\n * @param {Array.<Array.<number>>} simplifiedEndss Simplified endss.\n * @return {number} Simplified offset.\n */\nexport function quantizeMultiArray(\n flatCoordinates, offset, endss, stride,\n tolerance,\n simplifiedFlatCoordinates, simplifiedOffset, simplifiedEndss) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n const simplifiedEnds = [];\n simplifiedOffset = quantizeArray(\n flatCoordinates, offset, ends, stride,\n tolerance,\n simplifiedFlatCoordinates, simplifiedOffset, simplifiedEnds);\n simplifiedEndss.push(simplifiedEnds);\n offset = ends[ends.length - 1];\n }\n return simplifiedOffset;\n}\n","/**\n * @module ol/geom/LinearRing\n */\nimport {inherits} from '../util.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport SimpleGeometry from '../geom/SimpleGeometry.js';\nimport {linearRing as linearRingArea} from '../geom/flat/area.js';\nimport {assignClosestPoint, maxSquaredDelta} from '../geom/flat/closest.js';\nimport {deflateCoordinates} from '../geom/flat/deflate.js';\nimport {inflateCoordinates} from '../geom/flat/inflate.js';\nimport {douglasPeucker} from '../geom/flat/simplify.js';\n\n/**\n * @classdesc\n * Linear ring geometry. Only used as part of polygon; cannot be rendered\n * on its own.\n *\n * @constructor\n * @extends {module:ol/geom/SimpleGeometry}\n * @param {Array.<module:ol/coordinate~Coordinate>} coordinates Coordinates.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @api\n */\nconst LinearRing = function(coordinates, opt_layout) {\n\n SimpleGeometry.call(this);\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n this.setCoordinates(coordinates, opt_layout);\n\n};\n\ninherits(LinearRing, SimpleGeometry);\n\n\n/**\n * Make a complete copy of the geometry.\n * @return {!module:ol/geom/LinearRing} Clone.\n * @override\n * @api\n */\nLinearRing.prototype.clone = function() {\n const linearRing = new LinearRing(null);\n linearRing.setFlatCoordinates(this.layout, this.flatCoordinates.slice());\n return linearRing;\n};\n\n\n/**\n * @inheritDoc\n */\nLinearRing.prototype.closestPointXY = function(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(maxSquaredDelta(\n this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, 0));\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestPoint(\n this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n this.maxDelta_, true, x, y, closestPoint, minSquaredDistance);\n};\n\n\n/**\n * Return the area of the linear ring on projected plane.\n * @return {number} Area (on projected plane).\n * @api\n */\nLinearRing.prototype.getArea = function() {\n return linearRingArea(this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n};\n\n\n/**\n * Return the coordinates of the linear ring.\n * @return {Array.<module:ol/coordinate~Coordinate>} Coordinates.\n * @override\n * @api\n */\nLinearRing.prototype.getCoordinates = function() {\n return inflateCoordinates(\n this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n};\n\n\n/**\n * @inheritDoc\n */\nLinearRing.prototype.getSimplifiedGeometryInternal = function(squaredTolerance) {\n const simplifiedFlatCoordinates = [];\n simplifiedFlatCoordinates.length = douglasPeucker(\n this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n squaredTolerance, simplifiedFlatCoordinates, 0);\n const simplifiedLinearRing = new LinearRing(null);\n simplifiedLinearRing.setFlatCoordinates(\n GeometryLayout.XY, simplifiedFlatCoordinates);\n return simplifiedLinearRing;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nLinearRing.prototype.getType = function() {\n return GeometryType.LINEAR_RING;\n};\n\n\n/**\n * @inheritDoc\n */\nLinearRing.prototype.intersectsExtent = function(extent) {};\n\n\n/**\n * Set the coordinates of the linear ring.\n * @param {Array.<module:ol/coordinate~Coordinate>} coordinates Coordinates.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @override\n * @api\n */\nLinearRing.prototype.setCoordinates = function(coordinates, opt_layout) {\n if (!coordinates) {\n this.setFlatCoordinates(GeometryLayout.XY, null);\n } else {\n this.setLayout(opt_layout, coordinates, 1);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinates(\n this.flatCoordinates, 0, coordinates, this.stride);\n this.changed();\n }\n};\n\n\n/**\n * @param {module:ol/geom/GeometryLayout} layout Layout.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n */\nLinearRing.prototype.setFlatCoordinates = function(layout, flatCoordinates) {\n this.setFlatCoordinatesInternal(layout, flatCoordinates);\n this.changed();\n};\nexport default LinearRing;\n","/**\n * @module ol/geom/Point\n */\nimport {inherits} from '../util.js';\nimport {createOrUpdateFromCoordinate, containsXY} from '../extent.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport SimpleGeometry from '../geom/SimpleGeometry.js';\nimport {deflateCoordinate} from '../geom/flat/deflate.js';\nimport {squaredDistance as squaredDx} from '../math.js';\n\n/**\n * @classdesc\n * Point geometry.\n *\n * @constructor\n * @extends {module:ol/geom/SimpleGeometry}\n * @param {module:ol/coordinate~Coordinate} coordinates Coordinates.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @api\n */\nconst Point = function(coordinates, opt_layout) {\n SimpleGeometry.call(this);\n this.setCoordinates(coordinates, opt_layout);\n};\n\ninherits(Point, SimpleGeometry);\n\n\n/**\n * Make a complete copy of the geometry.\n * @return {!module:ol/geom/Point} Clone.\n * @override\n * @api\n */\nPoint.prototype.clone = function() {\n const point = new Point(null);\n point.setFlatCoordinates(this.layout, this.flatCoordinates.slice());\n return point;\n};\n\n\n/**\n * @inheritDoc\n */\nPoint.prototype.closestPointXY = function(x, y, closestPoint, minSquaredDistance) {\n const flatCoordinates = this.flatCoordinates;\n const squaredDistance = squaredDx(x, y, flatCoordinates[0], flatCoordinates[1]);\n if (squaredDistance < minSquaredDistance) {\n const stride = this.stride;\n for (let i = 0; i < stride; ++i) {\n closestPoint[i] = flatCoordinates[i];\n }\n closestPoint.length = stride;\n return squaredDistance;\n } else {\n return minSquaredDistance;\n }\n};\n\n\n/**\n * Return the coordinate of the point.\n * @return {module:ol/coordinate~Coordinate} Coordinates.\n * @override\n * @api\n */\nPoint.prototype.getCoordinates = function() {\n return !this.flatCoordinates ? [] : this.flatCoordinates.slice();\n};\n\n\n/**\n * @inheritDoc\n */\nPoint.prototype.computeExtent = function(extent) {\n return createOrUpdateFromCoordinate(this.flatCoordinates, extent);\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nPoint.prototype.getType = function() {\n return GeometryType.POINT;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nPoint.prototype.intersectsExtent = function(extent) {\n return containsXY(extent, this.flatCoordinates[0], this.flatCoordinates[1]);\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nPoint.prototype.setCoordinates = function(coordinates, opt_layout) {\n if (!coordinates) {\n this.setFlatCoordinates(GeometryLayout.XY, null);\n } else {\n this.setLayout(opt_layout, coordinates, 0);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinate(\n this.flatCoordinates, 0, coordinates, this.stride);\n this.changed();\n }\n};\n\n\n/**\n * @param {module:ol/geom/GeometryLayout} layout Layout.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n */\nPoint.prototype.setFlatCoordinates = function(layout, flatCoordinates) {\n this.setFlatCoordinatesInternal(layout, flatCoordinates);\n this.changed();\n};\nexport default Point;\n","/**\n * @module ol/geom/flat/contains\n */\nimport {forEachCorner} from '../../extent.js';\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {boolean} Contains extent.\n */\nexport function linearRingContainsExtent(flatCoordinates, offset, end, stride, extent) {\n const outside = forEachCorner(extent,\n /**\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @return {boolean} Contains (x, y).\n */\n function(coordinate) {\n return !linearRingContainsXY(flatCoordinates, offset, end, stride, coordinate[0], coordinate[1]);\n });\n return !outside;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingContainsXY(flatCoordinates, offset, end, stride, x, y) {\n // http://geomalgorithms.com/a03-_inclusion.html\n // Copyright 2000 softSurfer, 2012 Dan Sunday\n // This code may be freely used and modified for any purpose\n // providing that this copyright notice is included with it.\n // SoftSurfer makes no warranty for this code, and cannot be held\n // liable for any real or imagined damage resulting from its use.\n // Users of this code must verify correctness for their application.\n let wn = 0;\n let x1 = flatCoordinates[end - stride];\n let y1 = flatCoordinates[end - stride + 1];\n for (; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n if (y1 <= y) {\n if (y2 > y && ((x2 - x1) * (y - y1)) - ((x - x1) * (y2 - y1)) > 0) {\n wn++;\n }\n } else if (y2 <= y && ((x2 - x1) * (y - y1)) - ((x - x1) * (y2 - y1)) < 0) {\n wn--;\n }\n x1 = x2;\n y1 = y2;\n }\n return wn !== 0;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y) {\n if (ends.length === 0) {\n return false;\n }\n if (!linearRingContainsXY(flatCoordinates, offset, ends[0], stride, x, y)) {\n return false;\n }\n for (let i = 1, ii = ends.length; i < ii; ++i) {\n if (linearRingContainsXY(flatCoordinates, ends[i - 1], ends[i], stride, x, y)) {\n return false;\n }\n }\n return true;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {boolean} Contains (x, y).\n */\nexport function linearRingssContainsXY(flatCoordinates, offset, endss, stride, x, y) {\n if (endss.length === 0) {\n return false;\n }\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n return true;\n }\n offset = ends[ends.length - 1];\n }\n return false;\n}\n","/**\n * @module ol/geom/flat/interiorpoint\n */\nimport {numberSafeCompareFunction} from '../../array.js';\nimport {linearRingsContainsXY} from '../flat/contains.js';\n\n\n/**\n * Calculates a point that is likely to lie in the interior of the linear rings.\n * Inspired by JTS's com.vividsolutions.jts.geom.Geometry#getInteriorPoint.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {Array.<number>} flatCenters Flat centers.\n * @param {number} flatCentersOffset Flat center offset.\n * @param {Array.<number>=} opt_dest Destination.\n * @return {Array.<number>} Destination point as XYM coordinate, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointOfArray(flatCoordinates, offset,\n ends, stride, flatCenters, flatCentersOffset, opt_dest) {\n let i, ii, x, x1, x2, y1, y2;\n const y = flatCenters[flatCentersOffset + 1];\n /** @type {Array.<number>} */\n const intersections = [];\n // Calculate intersections with the horizontal line\n for (let r = 0, rr = ends.length; r < rr; ++r) {\n const end = ends[r];\n x1 = flatCoordinates[end - stride];\n y1 = flatCoordinates[end - stride + 1];\n for (i = offset; i < end; i += stride) {\n x2 = flatCoordinates[i];\n y2 = flatCoordinates[i + 1];\n if ((y <= y1 && y2 <= y) || (y1 <= y && y <= y2)) {\n x = (y - y1) / (y2 - y1) * (x2 - x1) + x1;\n intersections.push(x);\n }\n x1 = x2;\n y1 = y2;\n }\n }\n // Find the longest segment of the horizontal line that has its center point\n // inside the linear ring.\n let pointX = NaN;\n let maxSegmentLength = -Infinity;\n intersections.sort(numberSafeCompareFunction);\n x1 = intersections[0];\n for (i = 1, ii = intersections.length; i < ii; ++i) {\n x2 = intersections[i];\n const segmentLength = Math.abs(x2 - x1);\n if (segmentLength > maxSegmentLength) {\n x = (x1 + x2) / 2;\n if (linearRingsContainsXY(flatCoordinates, offset, ends, stride, x, y)) {\n pointX = x;\n maxSegmentLength = segmentLength;\n }\n }\n x1 = x2;\n }\n if (isNaN(pointX)) {\n // There is no horizontal line that has its center point inside the linear\n // ring. Use the center of the the linear ring's extent.\n pointX = flatCenters[flatCentersOffset];\n }\n if (opt_dest) {\n opt_dest.push(pointX, y, maxSegmentLength);\n return opt_dest;\n } else {\n return [pointX, y, maxSegmentLength];\n }\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {Array.<number>} flatCenters Flat centers.\n * @return {Array.<number>} Interior points as XYM coordinates, where M is the\n * length of the horizontal intersection that the point belongs to.\n */\nexport function getInteriorPointsOfMultiArray(flatCoordinates, offset, endss, stride, flatCenters) {\n let interiorPoints = [];\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n interiorPoints = getInteriorPointOfArray(flatCoordinates,\n offset, ends, stride, flatCenters, 2 * i, interiorPoints);\n offset = ends[ends.length - 1];\n }\n return interiorPoints;\n}\n","/**\n * @module ol/geom/flat/segments\n */\n\n\n/**\n * This function calls `callback` for each segment of the flat coordinates\n * array. If the callback returns a truthy value the function returns that\n * value immediately. Otherwise the function returns `false`.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {function(this: S, module:ol/coordinate~Coordinate, module:ol/coordinate~Coordinate): T} callback Function\n * called for each segment.\n * @param {S=} opt_this The object to be used as the value of 'this'\n * within callback.\n * @return {T|boolean} Value.\n * @template T,S\n */\nexport function forEach(flatCoordinates, offset, end, stride, callback, opt_this) {\n const point1 = [flatCoordinates[offset], flatCoordinates[offset + 1]];\n const point2 = [];\n let ret;\n for (; (offset + stride) < end; offset += stride) {\n point2[0] = flatCoordinates[offset + stride];\n point2[1] = flatCoordinates[offset + stride + 1];\n ret = callback.call(opt_this, point1, point2);\n if (ret) {\n return ret;\n }\n point1[0] = point2[0];\n point1[1] = point2[1];\n }\n return false;\n}\n","/**\n * @module ol/geom/flat/intersectsextent\n */\nimport {containsExtent, createEmpty, extendFlatCoordinates, intersects, intersectsSegment} from '../../extent.js';\nimport {linearRingContainsXY, linearRingContainsExtent} from '../flat/contains.js';\nimport {forEach as forEachSegment} from '../flat/segments.js';\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineString(flatCoordinates, offset, end, stride, extent) {\n const coordinatesExtent = extendFlatCoordinates(\n createEmpty(), flatCoordinates, offset, end, stride);\n if (!intersects(extent, coordinatesExtent)) {\n return false;\n }\n if (containsExtent(extent, coordinatesExtent)) {\n return true;\n }\n if (coordinatesExtent[0] >= extent[0] &&\n coordinatesExtent[2] <= extent[2]) {\n return true;\n }\n if (coordinatesExtent[1] >= extent[1] &&\n coordinatesExtent[3] <= extent[3]) {\n return true;\n }\n return forEachSegment(flatCoordinates, offset, end, stride,\n /**\n * @param {module:ol/coordinate~Coordinate} point1 Start point.\n * @param {module:ol/coordinate~Coordinate} point2 End point.\n * @return {boolean} `true` if the segment and the extent intersect,\n * `false` otherwise.\n */\n function(point1, point2) {\n return intersectsSegment(extent, point1, point2);\n });\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLineStringArray(flatCoordinates, offset, ends, stride, extent) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n if (intersectsLineString(\n flatCoordinates, offset, ends[i], stride, extent)) {\n return true;\n }\n offset = ends[i];\n }\n return false;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRing(flatCoordinates, offset, end, stride, extent) {\n if (intersectsLineString(\n flatCoordinates, offset, end, stride, extent)) {\n return true;\n }\n if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[0], extent[1])) {\n return true;\n }\n if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[0], extent[3])) {\n return true;\n }\n if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[2], extent[1])) {\n return true;\n }\n if (linearRingContainsXY(flatCoordinates, offset, end, stride, extent[2], extent[3])) {\n return true;\n }\n return false;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingArray(flatCoordinates, offset, ends, stride, extent) {\n if (!intersectsLinearRing(\n flatCoordinates, offset, ends[0], stride, extent)) {\n return false;\n }\n if (ends.length === 1) {\n return true;\n }\n for (let i = 1, ii = ends.length; i < ii; ++i) {\n if (linearRingContainsExtent(flatCoordinates, ends[i - 1], ends[i], stride, extent)) {\n return false;\n }\n }\n return true;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<number>>} endss Endss.\n * @param {number} stride Stride.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {boolean} True if the geometry and the extent intersect.\n */\nexport function intersectsLinearRingMultiArray(flatCoordinates, offset, endss, stride, extent) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n if (intersectsLinearRingArray(\n flatCoordinates, offset, ends, stride, extent)) {\n return true;\n }\n offset = ends[ends.length - 1];\n }\n return false;\n}\n","/**\n * @module ol/geom/flat/reverse\n */\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n */\nexport function coordinates(flatCoordinates, offset, end, stride) {\n while (offset < end - stride) {\n for (let i = 0; i < stride; ++i) {\n const tmp = flatCoordinates[offset + i];\n flatCoordinates[offset + i] = flatCoordinates[end - stride + i];\n flatCoordinates[end - stride + i] = tmp;\n }\n offset += stride;\n end -= stride;\n }\n}\n","/**\n * @module ol/geom/flat/orient\n */\nimport {coordinates as reverseCoordinates} from '../flat/reverse.js';\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {boolean} Is clockwise.\n */\nexport function linearRingIsClockwise(flatCoordinates, offset, end, stride) {\n // http://tinyurl.com/clockwise-method\n // https://github.com/OSGeo/gdal/blob/trunk/gdal/ogr/ogrlinearring.cpp\n let edge = 0;\n let x1 = flatCoordinates[end - stride];\n let y1 = flatCoordinates[end - stride + 1];\n for (; offset < end; offset += stride) {\n const x2 = flatCoordinates[offset];\n const y2 = flatCoordinates[offset + 1];\n edge += (x2 - x1) * (y2 + y1);\n x1 = x2;\n y1 = y2;\n }\n return edge > 0;\n}\n\n\n/**\n * Determines if linear rings are oriented. By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `opt_right` argument.\n *\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean=} opt_right Test for right-hand orientation\n * (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingIsOriented(flatCoordinates, offset, ends, stride, opt_right) {\n const right = opt_right !== undefined ? opt_right : false;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const isClockwise = linearRingIsClockwise(\n flatCoordinates, offset, end, stride);\n if (i === 0) {\n if ((right && isClockwise) || (!right && !isClockwise)) {\n return false;\n }\n } else {\n if ((right && !isClockwise) || (!right && isClockwise)) {\n return false;\n }\n }\n offset = end;\n }\n return true;\n}\n\n\n/**\n * Determines if linear rings are oriented. By default, left-hand orientation\n * is tested (first ring must be clockwise, remaining rings counter-clockwise).\n * To test for right-hand orientation, use the `opt_right` argument.\n *\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<number>>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean=} opt_right Test for right-hand orientation\n * (counter-clockwise exterior ring and clockwise interior rings).\n * @return {boolean} Rings are correctly oriented.\n */\nexport function linearRingsAreOriented(flatCoordinates, offset, endss, stride, opt_right) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n if (!linearRingIsOriented(\n flatCoordinates, offset, endss[i], stride, opt_right)) {\n return false;\n }\n }\n return true;\n}\n\n\n/**\n * Orient coordinates in a flat array of linear rings. By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings). To orient according to the\n * right-hand rule, use the `opt_right` argument.\n *\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {boolean=} opt_right Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRings(flatCoordinates, offset, ends, stride, opt_right) {\n const right = opt_right !== undefined ? opt_right : false;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const isClockwise = linearRingIsClockwise(\n flatCoordinates, offset, end, stride);\n const reverse = i === 0 ?\n (right && isClockwise) || (!right && !isClockwise) :\n (right && !isClockwise) || (!right && isClockwise);\n if (reverse) {\n reverseCoordinates(flatCoordinates, offset, end, stride);\n }\n offset = end;\n }\n return offset;\n}\n\n\n/**\n * Orient coordinates in a flat array of linear rings. By default, rings\n * are oriented following the left-hand rule (clockwise for exterior and\n * counter-clockwise for interior rings). To orient according to the\n * right-hand rule, use the `opt_right` argument.\n *\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<number>>} endss Array of array of end indexes.\n * @param {number} stride Stride.\n * @param {boolean=} opt_right Follow the right-hand rule for orientation.\n * @return {number} End.\n */\nexport function orientLinearRingsArray(flatCoordinates, offset, endss, stride, opt_right) {\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n offset = orientLinearRings(\n flatCoordinates, offset, endss[i], stride, opt_right);\n }\n return offset;\n}\n","/**\n * @module ol/geom/Polygon\n */\nimport {inherits} from '../util.js';\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY, getCenter} from '../extent.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport LinearRing from '../geom/LinearRing.js';\nimport Point from '../geom/Point.js';\nimport SimpleGeometry from '../geom/SimpleGeometry.js';\nimport {offset as sphereOffset} from '../sphere.js';\nimport {linearRings as linearRingsArea} from '../geom/flat/area.js';\nimport {assignClosestArrayPoint, arrayMaxSquaredDelta} from '../geom/flat/closest.js';\nimport {linearRingsContainsXY} from '../geom/flat/contains.js';\nimport {deflateCoordinatesArray} from '../geom/flat/deflate.js';\nimport {inflateCoordinatesArray} from '../geom/flat/inflate.js';\nimport {getInteriorPointOfArray} from '../geom/flat/interiorpoint.js';\nimport {intersectsLinearRingArray} from '../geom/flat/intersectsextent.js';\nimport {linearRingIsOriented, orientLinearRings} from '../geom/flat/orient.js';\nimport {quantizeArray} from '../geom/flat/simplify.js';\nimport {modulo} from '../math.js';\n\n/**\n * @classdesc\n * Polygon geometry.\n *\n * @constructor\n * @extends {module:ol/geom/SimpleGeometry}\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} coordinates Array of linear\n * rings that define the polygon. The first linear ring of the array\n * defines the outer-boundary or surface of the polygon. Each subsequent\n * linear ring defines a hole in the surface of the polygon. A linear ring\n * is an array of vertices' coordinates where the first coordinate and the\n * last are equivalent.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @api\n */\nconst Polygon = function(coordinates, opt_layout) {\n\n SimpleGeometry.call(this);\n\n /**\n * @type {Array.<number>}\n * @private\n */\n this.ends_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.flatInteriorPointRevision_ = -1;\n\n /**\n * @private\n * @type {module:ol/coordinate~Coordinate}\n */\n this.flatInteriorPoint_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.orientedRevision_ = -1;\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.orientedFlatCoordinates_ = null;\n\n this.setCoordinates(coordinates, opt_layout);\n\n};\n\ninherits(Polygon, SimpleGeometry);\n\n\n/**\n * Append the passed linear ring to this polygon.\n * @param {module:ol/geom/LinearRing} linearRing Linear ring.\n * @api\n */\nPolygon.prototype.appendLinearRing = function(linearRing) {\n if (!this.flatCoordinates) {\n this.flatCoordinates = linearRing.getFlatCoordinates().slice();\n } else {\n extend(this.flatCoordinates, linearRing.getFlatCoordinates());\n }\n this.ends_.push(this.flatCoordinates.length);\n this.changed();\n};\n\n\n/**\n * Make a complete copy of the geometry.\n * @return {!module:ol/geom/Polygon} Clone.\n * @override\n * @api\n */\nPolygon.prototype.clone = function() {\n const polygon = new Polygon(null);\n polygon.setFlatCoordinates(\n this.layout, this.flatCoordinates.slice(), this.ends_.slice());\n return polygon;\n};\n\n\n/**\n * @inheritDoc\n */\nPolygon.prototype.closestPointXY = function(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(arrayMaxSquaredDelta(\n this.flatCoordinates, 0, this.ends_, this.stride, 0));\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestArrayPoint(\n this.flatCoordinates, 0, this.ends_, this.stride,\n this.maxDelta_, true, x, y, closestPoint, minSquaredDistance);\n};\n\n\n/**\n * @inheritDoc\n */\nPolygon.prototype.containsXY = function(x, y) {\n return linearRingsContainsXY(this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride, x, y);\n};\n\n\n/**\n * Return the area of the polygon on projected plane.\n * @return {number} Area (on projected plane).\n * @api\n */\nPolygon.prototype.getArea = function() {\n return linearRingsArea(this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride);\n};\n\n\n/**\n * Get the coordinate array for this geometry. This array has the structure\n * of a GeoJSON coordinate array for polygons.\n *\n * @param {boolean=} opt_right Orient coordinates according to the right-hand\n * rule (counter-clockwise for exterior and clockwise for interior rings).\n * If `false`, coordinates will be oriented according to the left-hand rule\n * (clockwise for exterior and counter-clockwise for interior rings).\n * By default, coordinate orientation will depend on how the geometry was\n * constructed.\n * @return {Array.<Array.<module:ol/coordinate~Coordinate>>} Coordinates.\n * @override\n * @api\n */\nPolygon.prototype.getCoordinates = function(opt_right) {\n let flatCoordinates;\n if (opt_right !== undefined) {\n flatCoordinates = this.getOrientedFlatCoordinates().slice();\n orientLinearRings(\n flatCoordinates, 0, this.ends_, this.stride, opt_right);\n } else {\n flatCoordinates = this.flatCoordinates;\n }\n\n return inflateCoordinatesArray(\n flatCoordinates, 0, this.ends_, this.stride);\n};\n\n\n/**\n * @return {Array.<number>} Ends.\n */\nPolygon.prototype.getEnds = function() {\n return this.ends_;\n};\n\n\n/**\n * @return {Array.<number>} Interior point.\n */\nPolygon.prototype.getFlatInteriorPoint = function() {\n if (this.flatInteriorPointRevision_ != this.getRevision()) {\n const flatCenter = getCenter(this.getExtent());\n this.flatInteriorPoint_ = getInteriorPointOfArray(\n this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride,\n flatCenter, 0);\n this.flatInteriorPointRevision_ = this.getRevision();\n }\n return this.flatInteriorPoint_;\n};\n\n\n/**\n * Return an interior point of the polygon.\n * @return {module:ol/geom/Point} Interior point as XYM coordinate, where M is the\n * length of the horizontal intersection that the point belongs to.\n * @api\n */\nPolygon.prototype.getInteriorPoint = function() {\n return new Point(this.getFlatInteriorPoint(), GeometryLayout.XYM);\n};\n\n\n/**\n * Return the number of rings of the polygon, this includes the exterior\n * ring and any interior rings.\n *\n * @return {number} Number of rings.\n * @api\n */\nPolygon.prototype.getLinearRingCount = function() {\n return this.ends_.length;\n};\n\n\n/**\n * Return the Nth linear ring of the polygon geometry. Return `null` if the\n * given index is out of range.\n * The exterior linear ring is available at index `0` and the interior rings\n * at index `1` and beyond.\n *\n * @param {number} index Index.\n * @return {module:ol/geom/LinearRing} Linear ring.\n * @api\n */\nPolygon.prototype.getLinearRing = function(index) {\n if (index < 0 || this.ends_.length <= index) {\n return null;\n }\n const linearRing = new LinearRing(null);\n linearRing.setFlatCoordinates(this.layout, this.flatCoordinates.slice(\n index === 0 ? 0 : this.ends_[index - 1], this.ends_[index]));\n return linearRing;\n};\n\n\n/**\n * Return the linear rings of the polygon.\n * @return {Array.<module:ol/geom/LinearRing>} Linear rings.\n * @api\n */\nPolygon.prototype.getLinearRings = function() {\n const layout = this.layout;\n const flatCoordinates = this.flatCoordinates;\n const ends = this.ends_;\n const linearRings = [];\n let offset = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const linearRing = new LinearRing(null);\n linearRing.setFlatCoordinates(layout, flatCoordinates.slice(offset, end));\n linearRings.push(linearRing);\n offset = end;\n }\n return linearRings;\n};\n\n\n/**\n * @return {Array.<number>} Oriented flat coordinates.\n */\nPolygon.prototype.getOrientedFlatCoordinates = function() {\n if (this.orientedRevision_ != this.getRevision()) {\n const flatCoordinates = this.flatCoordinates;\n if (linearRingIsOriented(\n flatCoordinates, 0, this.ends_, this.stride)) {\n this.orientedFlatCoordinates_ = flatCoordinates;\n } else {\n this.orientedFlatCoordinates_ = flatCoordinates.slice();\n this.orientedFlatCoordinates_.length =\n orientLinearRings(\n this.orientedFlatCoordinates_, 0, this.ends_, this.stride);\n }\n this.orientedRevision_ = this.getRevision();\n }\n return this.orientedFlatCoordinates_;\n};\n\n\n/**\n * @inheritDoc\n */\nPolygon.prototype.getSimplifiedGeometryInternal = function(squaredTolerance) {\n const simplifiedFlatCoordinates = [];\n const simplifiedEnds = [];\n simplifiedFlatCoordinates.length = quantizeArray(\n this.flatCoordinates, 0, this.ends_, this.stride,\n Math.sqrt(squaredTolerance),\n simplifiedFlatCoordinates, 0, simplifiedEnds);\n const simplifiedPolygon = new Polygon(null);\n simplifiedPolygon.setFlatCoordinates(\n GeometryLayout.XY, simplifiedFlatCoordinates, simplifiedEnds);\n return simplifiedPolygon;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nPolygon.prototype.getType = function() {\n return GeometryType.POLYGON;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nPolygon.prototype.intersectsExtent = function(extent) {\n return intersectsLinearRingArray(\n this.getOrientedFlatCoordinates(), 0, this.ends_, this.stride, extent);\n};\n\n\n/**\n * Set the coordinates of the polygon.\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} coordinates Coordinates.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @override\n * @api\n */\nPolygon.prototype.setCoordinates = function(coordinates, opt_layout) {\n if (!coordinates) {\n this.setFlatCoordinates(GeometryLayout.XY, null, this.ends_);\n } else {\n this.setLayout(opt_layout, coordinates, 2);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n const ends = deflateCoordinatesArray(\n this.flatCoordinates, 0, coordinates, this.stride, this.ends_);\n this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];\n this.changed();\n }\n};\n\n\n/**\n * @param {module:ol/geom/GeometryLayout} layout Layout.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {Array.<number>} ends Ends.\n */\nPolygon.prototype.setFlatCoordinates = function(layout, flatCoordinates, ends) {\n this.setFlatCoordinatesInternal(layout, flatCoordinates);\n this.ends_ = ends;\n this.changed();\n};\n\nexport default Polygon;\n\n\n/**\n * Create an approximation of a circle on the surface of a sphere.\n * @param {module:ol/coordinate~Coordinate} center Center (`[lon, lat]` in degrees).\n * @param {number} radius The great-circle distance from the center to\n * the polygon vertices.\n * @param {number=} opt_n Optional number of vertices for the resulting\n * polygon. Default is `32`.\n * @param {number=} opt_sphereRadius Optional radius for the sphere (defaults to\n * the Earth's mean radius using the WGS84 ellipsoid).\n * @return {module:ol/geom/Polygon} The \"circular\" polygon.\n * @api\n */\nexport function circular(center, radius, opt_n, opt_sphereRadius) {\n const n = opt_n ? opt_n : 32;\n /** @type {Array.<number>} */\n const flatCoordinates = [];\n for (let i = 0; i < n; ++i) {\n extend(flatCoordinates, sphereOffset(center, radius, 2 * Math.PI * i / n, opt_sphereRadius));\n }\n flatCoordinates.push(flatCoordinates[0], flatCoordinates[1]);\n const polygon = new Polygon(null);\n polygon.setFlatCoordinates(GeometryLayout.XY, flatCoordinates, [flatCoordinates.length]);\n return polygon;\n}\n\n\n/**\n * Create a polygon from an extent. The layout used is `XY`.\n * @param {module:ol/extent~Extent} extent The extent.\n * @return {module:ol/geom/Polygon} The polygon.\n * @api\n */\nexport function fromExtent(extent) {\n const minX = extent[0];\n const minY = extent[1];\n const maxX = extent[2];\n const maxY = extent[3];\n const flatCoordinates =\n [minX, minY, minX, maxY, maxX, maxY, maxX, minY, minX, minY];\n const polygon = new Polygon(null);\n polygon.setFlatCoordinates(\n GeometryLayout.XY, flatCoordinates, [flatCoordinates.length]);\n return polygon;\n}\n\n\n/**\n * Create a regular polygon from a circle.\n * @param {module:ol/geom/Circle} circle Circle geometry.\n * @param {number=} opt_sides Number of sides of the polygon. Default is 32.\n * @param {number=} opt_angle Start angle for the first vertex of the polygon in\n * radians. Default is 0.\n * @return {module:ol/geom/Polygon} Polygon geometry.\n * @api\n */\nexport function fromCircle(circle, opt_sides, opt_angle) {\n const sides = opt_sides ? opt_sides : 32;\n const stride = circle.getStride();\n const layout = circle.getLayout();\n const polygon = new Polygon(null, layout);\n const arrayLength = stride * (sides + 1);\n const flatCoordinates = new Array(arrayLength);\n for (let i = 0; i < arrayLength; i++) {\n flatCoordinates[i] = 0;\n }\n const ends = [flatCoordinates.length];\n polygon.setFlatCoordinates(layout, flatCoordinates, ends);\n makeRegular(polygon, circle.getCenter(), circle.getRadius(), opt_angle);\n return polygon;\n}\n\n\n/**\n * Modify the coordinates of a polygon to make it a regular polygon.\n * @param {module:ol/geom/Polygon} polygon Polygon geometry.\n * @param {module:ol/coordinate~Coordinate} center Center of the regular polygon.\n * @param {number} radius Radius of the regular polygon.\n * @param {number=} opt_angle Start angle for the first vertex of the polygon in\n * radians. Default is 0.\n */\nexport function makeRegular(polygon, center, radius, opt_angle) {\n const flatCoordinates = polygon.getFlatCoordinates();\n const layout = polygon.getLayout();\n const stride = polygon.getStride();\n const ends = polygon.getEnds();\n const sides = flatCoordinates.length / stride - 1;\n const startAngle = opt_angle ? opt_angle : 0;\n for (let i = 0; i <= sides; ++i) {\n const offset = i * stride;\n const angle = startAngle + (modulo(i, sides) * 2 * Math.PI / sides);\n flatCoordinates[offset] = center[0] + (radius * Math.cos(angle));\n flatCoordinates[offset + 1] = center[1] + (radius * Math.sin(angle));\n }\n polygon.setFlatCoordinates(layout, flatCoordinates, ends);\n}\n","/**\n * @module ol/Geolocation\n */\nimport {inherits} from './util.js';\nimport GeolocationProperty from './GeolocationProperty.js';\nimport BaseObject, {getChangeEventType} from './Object.js';\nimport {listen} from './events.js';\nimport EventType from './events/EventType.js';\nimport {circular as circularPolygon} from './geom/Polygon.js';\nimport {GEOLOCATION} from './has.js';\nimport {toRadians} from './math.js';\nimport {get as getProjection, getTransformFromProjections, identityTransform} from './proj.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [tracking=false] Start Tracking right after\n * instantiation.\n * @property {GeolocationPositionOptions} [trackingOptions] Tracking options.\n * See {@link http://www.w3.org/TR/geolocation-API/#position_options_interface}.\n * @property {module:ol/proj~ProjectionLike} [projection] The projection the position\n * is reported in.\n */\n\n\n/**\n * @classdesc\n * Helper class for providing HTML5 Geolocation capabilities.\n * The [Geolocation API](http://www.w3.org/TR/geolocation-API/)\n * is used to locate a user's position.\n *\n * To get notified of position changes, register a listener for the generic\n * `change` event on your instance of {@link module:ol/Geolocation~Geolocation}.\n *\n * Example:\n *\n * var geolocation = new Geolocation({\n * // take the projection to use from the map's view\n * projection: view.getProjection()\n * });\n * // listen to changes in position\n * geolocation.on('change', function(evt) {\n * window.console.log(geolocation.getPosition());\n * });\n *\n * @fires error\n * @constructor\n * @extends {module:ol/Object}\n * @param {module:ol/Geolocation~Options=} opt_options Options.\n * @api\n */\nconst Geolocation = function(opt_options) {\n\n BaseObject.call(this);\n\n const options = opt_options || {};\n\n /**\n * The unprojected (EPSG:4326) device position.\n * @private\n * @type {module:ol/coordinate~Coordinate}\n */\n this.position_ = null;\n\n /**\n * @private\n * @type {module:ol/proj~TransformFunction}\n */\n this.transform_ = identityTransform;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.watchId_ = undefined;\n\n listen(\n this, getChangeEventType(GeolocationProperty.PROJECTION),\n this.handleProjectionChanged_, this);\n listen(\n this, getChangeEventType(GeolocationProperty.TRACKING),\n this.handleTrackingChanged_, this);\n\n if (options.projection !== undefined) {\n this.setProjection(options.projection);\n }\n if (options.trackingOptions !== undefined) {\n this.setTrackingOptions(options.trackingOptions);\n }\n\n this.setTracking(options.tracking !== undefined ? options.tracking : false);\n\n};\n\ninherits(Geolocation, BaseObject);\n\n\n/**\n * @inheritDoc\n */\nGeolocation.prototype.disposeInternal = function() {\n this.setTracking(false);\n BaseObject.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * @private\n */\nGeolocation.prototype.handleProjectionChanged_ = function() {\n const projection = this.getProjection();\n if (projection) {\n this.transform_ = getTransformFromProjections(\n getProjection('EPSG:4326'), projection);\n if (this.position_) {\n this.set(GeolocationProperty.POSITION, this.transform_(this.position_));\n }\n }\n};\n\n\n/**\n * @private\n */\nGeolocation.prototype.handleTrackingChanged_ = function() {\n if (GEOLOCATION) {\n const tracking = this.getTracking();\n if (tracking && this.watchId_ === undefined) {\n this.watchId_ = navigator.geolocation.watchPosition(\n this.positionChange_.bind(this),\n this.positionError_.bind(this),\n this.getTrackingOptions());\n } else if (!tracking && this.watchId_ !== undefined) {\n navigator.geolocation.clearWatch(this.watchId_);\n this.watchId_ = undefined;\n }\n }\n};\n\n\n/**\n * @private\n * @param {GeolocationPosition} position position event.\n */\nGeolocation.prototype.positionChange_ = function(position) {\n const coords = position.coords;\n this.set(GeolocationProperty.ACCURACY, coords.accuracy);\n this.set(GeolocationProperty.ALTITUDE,\n coords.altitude === null ? undefined : coords.altitude);\n this.set(GeolocationProperty.ALTITUDE_ACCURACY,\n coords.altitudeAccuracy === null ?\n undefined : coords.altitudeAccuracy);\n this.set(GeolocationProperty.HEADING, coords.heading === null ?\n undefined : toRadians(coords.heading));\n if (!this.position_) {\n this.position_ = [coords.longitude, coords.latitude];\n } else {\n this.position_[0] = coords.longitude;\n this.position_[1] = coords.latitude;\n }\n const projectedPosition = this.transform_(this.position_);\n this.set(GeolocationProperty.POSITION, projectedPosition);\n this.set(GeolocationProperty.SPEED,\n coords.speed === null ? undefined : coords.speed);\n const geometry = circularPolygon(this.position_, coords.accuracy);\n geometry.applyTransform(this.transform_);\n this.set(GeolocationProperty.ACCURACY_GEOMETRY, geometry);\n this.changed();\n};\n\n/**\n * Triggered when the Geolocation returns an error.\n * @event error\n * @api\n */\n\n/**\n * @private\n * @param {GeolocationPositionError} error error object.\n */\nGeolocation.prototype.positionError_ = function(error) {\n error.type = EventType.ERROR;\n this.setTracking(false);\n this.dispatchEvent(/** @type {{type: string, target: undefined}} */ (error));\n};\n\n\n/**\n * Get the accuracy of the position in meters.\n * @return {number|undefined} The accuracy of the position measurement in\n * meters.\n * @observable\n * @api\n */\nGeolocation.prototype.getAccuracy = function() {\n return /** @type {number|undefined} */ (this.get(GeolocationProperty.ACCURACY));\n};\n\n\n/**\n * Get a geometry of the position accuracy.\n * @return {?module:ol/geom/Polygon} A geometry of the position accuracy.\n * @observable\n * @api\n */\nGeolocation.prototype.getAccuracyGeometry = function() {\n return (\n /** @type {?module:ol/geom/Polygon} */ (this.get(GeolocationProperty.ACCURACY_GEOMETRY) || null)\n );\n};\n\n\n/**\n * Get the altitude associated with the position.\n * @return {number|undefined} The altitude of the position in meters above mean\n * sea level.\n * @observable\n * @api\n */\nGeolocation.prototype.getAltitude = function() {\n return /** @type {number|undefined} */ (this.get(GeolocationProperty.ALTITUDE));\n};\n\n\n/**\n * Get the altitude accuracy of the position.\n * @return {number|undefined} The accuracy of the altitude measurement in\n * meters.\n * @observable\n * @api\n */\nGeolocation.prototype.getAltitudeAccuracy = function() {\n return /** @type {number|undefined} */ (this.get(GeolocationProperty.ALTITUDE_ACCURACY));\n};\n\n\n/**\n * Get the heading as radians clockwise from North.\n * Note: depending on the browser, the heading is only defined if the `enableHighAccuracy`\n * is set to `true` in the tracking options.\n * @return {number|undefined} The heading of the device in radians from north.\n * @observable\n * @api\n */\nGeolocation.prototype.getHeading = function() {\n return /** @type {number|undefined} */ (this.get(GeolocationProperty.HEADING));\n};\n\n\n/**\n * Get the position of the device.\n * @return {module:ol/coordinate~Coordinate|undefined} The current position of the device reported\n * in the current projection.\n * @observable\n * @api\n */\nGeolocation.prototype.getPosition = function() {\n return (\n /** @type {module:ol/coordinate~Coordinate|undefined} */ (this.get(GeolocationProperty.POSITION))\n );\n};\n\n\n/**\n * Get the projection associated with the position.\n * @return {module:ol/proj/Projection|undefined} The projection the position is\n * reported in.\n * @observable\n * @api\n */\nGeolocation.prototype.getProjection = function() {\n return (\n /** @type {module:ol/proj/Projection|undefined} */ (this.get(GeolocationProperty.PROJECTION))\n );\n};\n\n\n/**\n * Get the speed in meters per second.\n * @return {number|undefined} The instantaneous speed of the device in meters\n * per second.\n * @observable\n * @api\n */\nGeolocation.prototype.getSpeed = function() {\n return /** @type {number|undefined} */ (this.get(GeolocationProperty.SPEED));\n};\n\n\n/**\n * Determine if the device location is being tracked.\n * @return {boolean} The device location is being tracked.\n * @observable\n * @api\n */\nGeolocation.prototype.getTracking = function() {\n return /** @type {boolean} */ (this.get(GeolocationProperty.TRACKING));\n};\n\n\n/**\n * Get the tracking options.\n * @see http://www.w3.org/TR/geolocation-API/#position-options\n * @return {GeolocationPositionOptions|undefined} PositionOptions as defined by\n * the [HTML5 Geolocation spec\n * ](http://www.w3.org/TR/geolocation-API/#position_options_interface).\n * @observable\n * @api\n */\nGeolocation.prototype.getTrackingOptions = function() {\n return /** @type {GeolocationPositionOptions|undefined} */ (this.get(GeolocationProperty.TRACKING_OPTIONS));\n};\n\n\n/**\n * Set the projection to use for transforming the coordinates.\n * @param {module:ol/proj~ProjectionLike} projection The projection the position is\n * reported in.\n * @observable\n * @api\n */\nGeolocation.prototype.setProjection = function(projection) {\n this.set(GeolocationProperty.PROJECTION, getProjection(projection));\n};\n\n\n/**\n * Enable or disable tracking.\n * @param {boolean} tracking Enable tracking.\n * @observable\n * @api\n */\nGeolocation.prototype.setTracking = function(tracking) {\n this.set(GeolocationProperty.TRACKING, tracking);\n};\n\n\n/**\n * Set the tracking options.\n * @see http://www.w3.org/TR/geolocation-API/#position-options\n * @param {GeolocationPositionOptions} options PositionOptions as defined by the\n * [HTML5 Geolocation spec\n * ](http://www.w3.org/TR/geolocation-API/#position_options_interface).\n * @observable\n * @api\n */\nGeolocation.prototype.setTrackingOptions = function(options) {\n this.set(GeolocationProperty.TRACKING_OPTIONS, options);\n};\nexport default Geolocation;\n","/**\n * @module ol/string\n */\n\n/**\n * @param {number} number Number to be formatted\n * @param {number} width The desired width\n * @param {number=} opt_precision Precision of the output string (i.e. number of decimal places)\n * @returns {string} Formatted string\n */\nexport function padNumber(number, width, opt_precision) {\n const numberString = opt_precision !== undefined ? number.toFixed(opt_precision) : '' + number;\n let decimal = numberString.indexOf('.');\n decimal = decimal === -1 ? numberString.length : decimal;\n return decimal > width ? numberString : new Array(1 + width - decimal).join('0') + numberString;\n}\n\n\n/**\n * Adapted from https://github.com/omichelsen/compare-versions/blob/master/index.js\n * @param {string|number} v1 First version\n * @param {string|number} v2 Second version\n * @returns {number} Value\n */\nexport function compareVersions(v1, v2) {\n const s1 = ('' + v1).split('.');\n const s2 = ('' + v2).split('.');\n\n for (let i = 0; i < Math.max(s1.length, s2.length); i++) {\n const n1 = parseInt(s1[i] || '0', 10);\n const n2 = parseInt(s2[i] || '0', 10);\n\n if (n1 > n2) {\n return 1;\n }\n if (n2 > n1) {\n return -1;\n }\n }\n\n return 0;\n}\n","/**\n * @module ol/coordinate\n */\nimport {modulo} from './math.js';\nimport {padNumber} from './string.js';\n\n\n/**\n * An array of numbers representing an xy coordinate. Example: `[16, 48]`.\n * @typedef {Array.<number>} Coordinate\n * @api\n */\n\n\n/**\n * A function that takes a {@link module:ol/coordinate~Coordinate} and\n * transforms it into a `{string}`.\n *\n * @typedef {function((module:ol/coordinate~Coordinate|undefined)): string} CoordinateFormat\n * @api\n */\n\n\n/**\n * Add `delta` to `coordinate`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n * import {add} from 'ol/coordinate';\n *\n * var coord = [7.85, 47.983333];\n * add(coord, [-2, 4]);\n * // coord is now [5.85, 51.983333]\n *\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {module:ol/coordinate~Coordinate} delta Delta.\n * @return {module:ol/coordinate~Coordinate} The input coordinate adjusted by\n * the given delta.\n * @api\n */\nexport function add(coordinate, delta) {\n coordinate[0] += delta[0];\n coordinate[1] += delta[1];\n return coordinate;\n}\n\n\n/**\n * Calculates the point closest to the passed coordinate on the passed circle.\n *\n * @param {module:ol/coordinate~Coordinate} coordinate The coordinate.\n * @param {module:ol/geom/Circle} circle The circle.\n * @return {module:ol/coordinate~Coordinate} Closest point on the circumference.\n */\nexport function closestOnCircle(coordinate, circle) {\n const r = circle.getRadius();\n const center = circle.getCenter();\n const x0 = center[0];\n const y0 = center[1];\n const x1 = coordinate[0];\n const y1 = coordinate[1];\n\n let dx = x1 - x0;\n const dy = y1 - y0;\n if (dx === 0 && dy === 0) {\n dx = 1;\n }\n const d = Math.sqrt(dx * dx + dy * dy);\n\n const x = x0 + r * dx / d;\n const y = y0 + r * dy / d;\n\n return [x, y];\n}\n\n\n/**\n * Calculates the point closest to the passed coordinate on the passed segment.\n * This is the foot of the perpendicular of the coordinate to the segment when\n * the foot is on the segment, or the closest segment coordinate when the foot\n * is outside the segment.\n *\n * @param {module:ol/coordinate~Coordinate} coordinate The coordinate.\n * @param {Array.<module:ol/coordinate~Coordinate>} segment The two coordinates\n * of the segment.\n * @return {module:ol/coordinate~Coordinate} The foot of the perpendicular of\n * the coordinate to the segment.\n */\nexport function closestOnSegment(coordinate, segment) {\n const x0 = coordinate[0];\n const y0 = coordinate[1];\n const start = segment[0];\n const end = segment[1];\n const x1 = start[0];\n const y1 = start[1];\n const x2 = end[0];\n const y2 = end[1];\n const dx = x2 - x1;\n const dy = y2 - y1;\n const along = (dx === 0 && dy === 0) ? 0 :\n ((dx * (x0 - x1)) + (dy * (y0 - y1))) / ((dx * dx + dy * dy) || 0);\n let x, y;\n if (along <= 0) {\n x = x1;\n y = y1;\n } else if (along >= 1) {\n x = x2;\n y = y2;\n } else {\n x = x1 + along * dx;\n y = y1 + along * dy;\n }\n return [x, y];\n}\n\n\n/**\n * Returns a {@link module:ol/coordinate~CoordinateFormat} function that can be\n * used to format\n * a {module:ol/coordinate~Coordinate} to a string.\n *\n * Example without specifying the fractional digits:\n *\n * import {createStringXY} from 'ol/coordinate';\n *\n * var coord = [7.85, 47.983333];\n * var stringifyFunc = createStringXY();\n * var out = stringifyFunc(coord);\n * // out is now '8, 48'\n *\n * Example with explicitly specifying 2 fractional digits:\n *\n * import {createStringXY} from 'ol/coordinate';\n *\n * var coord = [7.85, 47.983333];\n * var stringifyFunc = createStringXY(2);\n * var out = stringifyFunc(coord);\n * // out is now '7.85, 47.98'\n *\n * @param {number=} opt_fractionDigits The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {module:ol/coordinate~CoordinateFormat} Coordinate format.\n * @api\n */\nexport function createStringXY(opt_fractionDigits) {\n return (\n /**\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @return {string} String XY.\n */\n function(coordinate) {\n return toStringXY(coordinate, opt_fractionDigits);\n }\n );\n}\n\n\n/**\n * @param {string} hemispheres Hemispheres.\n * @param {number} degrees Degrees.\n * @param {number=} opt_fractionDigits The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} String.\n */\nexport function degreesToStringHDMS(hemispheres, degrees, opt_fractionDigits) {\n const normalizedDegrees = modulo(degrees + 180, 360) - 180;\n const x = Math.abs(3600 * normalizedDegrees);\n const dflPrecision = opt_fractionDigits || 0;\n const precision = Math.pow(10, dflPrecision);\n\n let deg = Math.floor(x / 3600);\n let min = Math.floor((x - deg * 3600) / 60);\n let sec = x - (deg * 3600) - (min * 60);\n sec = Math.ceil(sec * precision) / precision;\n\n if (sec >= 60) {\n sec = 0;\n min += 1;\n }\n\n if (min >= 60) {\n min = 0;\n deg += 1;\n }\n\n return deg + '\\u00b0 ' + padNumber(min, 2) + '\\u2032 ' +\n padNumber(sec, 2, dflPrecision) + '\\u2033' +\n (normalizedDegrees == 0 ? '' : ' ' + hemispheres.charAt(normalizedDegrees < 0 ? 1 : 0));\n}\n\n\n/**\n * Transforms the given {@link module:ol/coordinate~Coordinate} to a string\n * using the given string template. The strings `{x}` and `{y}` in the template\n * will be replaced with the first and second coordinate values respectively.\n *\n * Example without specifying the fractional digits:\n *\n * import {format} from 'ol/coordinate';\n *\n * var coord = [7.85, 47.983333];\n * var template = 'Coordinate is ({x}|{y}).';\n * var out = format(coord, template);\n * // out is now 'Coordinate is (8|48).'\n *\n * Example explicitly specifying the fractional digits:\n *\n * import {format} from 'ol/coordinate';\n *\n * var coord = [7.85, 47.983333];\n * var template = 'Coordinate is ({x}|{y}).';\n * var out = format(coord, template, 2);\n * // out is now 'Coordinate is (7.85|47.98).'\n *\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {string} template A template string with `{x}` and `{y}` placeholders\n * that will be replaced by first and second coordinate values.\n * @param {number=} opt_fractionDigits The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} Formatted coordinate.\n * @api\n */\nexport function format(coordinate, template, opt_fractionDigits) {\n if (coordinate) {\n return template\n .replace('{x}', coordinate[0].toFixed(opt_fractionDigits))\n .replace('{y}', coordinate[1].toFixed(opt_fractionDigits));\n } else {\n return '';\n }\n}\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} coordinate1 First coordinate.\n * @param {module:ol/coordinate~Coordinate} coordinate2 Second coordinate.\n * @return {boolean} The two coordinates are equal.\n */\nexport function equals(coordinate1, coordinate2) {\n let equals = true;\n for (let i = coordinate1.length - 1; i >= 0; --i) {\n if (coordinate1[i] != coordinate2[i]) {\n equals = false;\n break;\n }\n }\n return equals;\n}\n\n\n/**\n * Rotate `coordinate` by `angle`. `coordinate` is modified in place and\n * returned by the function.\n *\n * Example:\n *\n * import {rotate} from 'ol/coordinate';\n *\n * var coord = [7.85, 47.983333];\n * var rotateRadians = Math.PI / 2; // 90 degrees\n * rotate(coord, rotateRadians);\n * // coord is now [-47.983333, 7.85]\n *\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {number} angle Angle in radian.\n * @return {module:ol/coordinate~Coordinate} Coordinate.\n * @api\n */\nexport function rotate(coordinate, angle) {\n const cosAngle = Math.cos(angle);\n const sinAngle = Math.sin(angle);\n const x = coordinate[0] * cosAngle - coordinate[1] * sinAngle;\n const y = coordinate[1] * cosAngle + coordinate[0] * sinAngle;\n coordinate[0] = x;\n coordinate[1] = y;\n return coordinate;\n}\n\n\n/**\n * Scale `coordinate` by `scale`. `coordinate` is modified in place and returned\n * by the function.\n *\n * Example:\n *\n * import {scale as scaleCoordinate} from 'ol/coordinate';\n *\n * var coord = [7.85, 47.983333];\n * var scale = 1.2;\n * scaleCoordinate(coord, scale);\n * // coord is now [9.42, 57.5799996]\n *\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {number} scale Scale factor.\n * @return {module:ol/coordinate~Coordinate} Coordinate.\n */\nexport function scale(coordinate, scale) {\n coordinate[0] *= scale;\n coordinate[1] *= scale;\n return coordinate;\n}\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} coord1 First coordinate.\n * @param {module:ol/coordinate~Coordinate} coord2 Second coordinate.\n * @return {number} Squared distance between coord1 and coord2.\n */\nexport function squaredDistance(coord1, coord2) {\n const dx = coord1[0] - coord2[0];\n const dy = coord1[1] - coord2[1];\n return dx * dx + dy * dy;\n}\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} coord1 First coordinate.\n * @param {module:ol/coordinate~Coordinate} coord2 Second coordinate.\n * @return {number} Distance between coord1 and coord2.\n */\nexport function distance(coord1, coord2) {\n return Math.sqrt(squaredDistance(coord1, coord2));\n}\n\n\n/**\n * Calculate the squared distance from a coordinate to a line segment.\n *\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate of the point.\n * @param {Array.<module:ol/coordinate~Coordinate>} segment Line segment (2\n * coordinates).\n * @return {number} Squared distance from the point to the line segment.\n */\nexport function squaredDistanceToSegment(coordinate, segment) {\n return squaredDistance(coordinate,\n closestOnSegment(coordinate, segment));\n}\n\n\n/**\n * Format a geographic coordinate with the hemisphere, degrees, minutes, and\n * seconds.\n *\n * Example without specifying fractional digits:\n *\n * import {toStringHDMS} from 'ol/coordinate';\n *\n * var coord = [7.85, 47.983333];\n * var out = toStringHDMS(coord);\n * // out is now '47° 58′ 60″ N 7° 50′ 60″ E'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n * import {toStringHDMS} from 'ol/coordinate';\n *\n * var coord = [7.85, 47.983333];\n * var out = toStringHDMS(coord, 1);\n * // out is now '47° 58′ 60.0″ N 7° 50′ 60.0″ E'\n *\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {number=} opt_fractionDigits The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} Hemisphere, degrees, minutes and seconds.\n * @api\n */\nexport function toStringHDMS(coordinate, opt_fractionDigits) {\n if (coordinate) {\n return degreesToStringHDMS('NS', coordinate[1], opt_fractionDigits) + ' ' +\n degreesToStringHDMS('EW', coordinate[0], opt_fractionDigits);\n } else {\n return '';\n }\n}\n\n\n/**\n * Format a coordinate as a comma delimited string.\n *\n * Example without specifying fractional digits:\n *\n * import {toStringXY} from 'ol/coordinate';\n *\n * var coord = [7.85, 47.983333];\n * var out = toStringXY(coord);\n * // out is now '8, 48'\n *\n * Example explicitly specifying 1 fractional digit:\n *\n * import {toStringXY} from 'ol/coordinate';\n *\n * var coord = [7.85, 47.983333];\n * var out = toStringXY(coord, 1);\n * // out is now '7.8, 48.0'\n *\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {number=} opt_fractionDigits The number of digits to include\n * after the decimal point. Default is `0`.\n * @return {string} XY.\n * @api\n */\nexport function toStringXY(coordinate, opt_fractionDigits) {\n return format(coordinate, '{x}, {y}', opt_fractionDigits);\n}\n","/**\n * @module ol/geom/flat/interpolate\n */\nimport {binarySearch} from '../../array.js';\nimport {lerp} from '../../math.js';\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} fraction Fraction.\n * @param {Array.<number>=} opt_dest Destination.\n * @return {Array.<number>} Destination.\n */\nexport function interpolatePoint(flatCoordinates, offset, end, stride, fraction, opt_dest) {\n let pointX = NaN;\n let pointY = NaN;\n const n = (end - offset) / stride;\n if (n === 1) {\n pointX = flatCoordinates[offset];\n pointY = flatCoordinates[offset + 1];\n } else if (n == 2) {\n pointX = (1 - fraction) * flatCoordinates[offset] +\n fraction * flatCoordinates[offset + stride];\n pointY = (1 - fraction) * flatCoordinates[offset + 1] +\n fraction * flatCoordinates[offset + stride + 1];\n } else if (n !== 0) {\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n let length = 0;\n const cumulativeLengths = [0];\n for (let i = offset + stride; i < end; i += stride) {\n const x2 = flatCoordinates[i];\n const y2 = flatCoordinates[i + 1];\n length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n cumulativeLengths.push(length);\n x1 = x2;\n y1 = y2;\n }\n const target = fraction * length;\n const index = binarySearch(cumulativeLengths, target);\n if (index < 0) {\n const t = (target - cumulativeLengths[-index - 2]) /\n (cumulativeLengths[-index - 1] - cumulativeLengths[-index - 2]);\n const o = offset + (-index - 2) * stride;\n pointX = lerp(\n flatCoordinates[o], flatCoordinates[o + stride], t);\n pointY = lerp(\n flatCoordinates[o + 1], flatCoordinates[o + stride + 1], t);\n } else {\n pointX = flatCoordinates[offset + index * stride];\n pointY = flatCoordinates[offset + index * stride + 1];\n }\n }\n if (opt_dest) {\n opt_dest[0] = pointX;\n opt_dest[1] = pointY;\n return opt_dest;\n } else {\n return [pointX, pointY];\n }\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {number} m M.\n * @param {boolean} extrapolate Extrapolate.\n * @return {module:ol/coordinate~Coordinate} Coordinate.\n */\nexport function lineStringCoordinateAtM(flatCoordinates, offset, end, stride, m, extrapolate) {\n if (end == offset) {\n return null;\n }\n let coordinate;\n if (m < flatCoordinates[offset + stride - 1]) {\n if (extrapolate) {\n coordinate = flatCoordinates.slice(offset, offset + stride);\n coordinate[stride - 1] = m;\n return coordinate;\n } else {\n return null;\n }\n } else if (flatCoordinates[end - 1] < m) {\n if (extrapolate) {\n coordinate = flatCoordinates.slice(end - stride, end);\n coordinate[stride - 1] = m;\n return coordinate;\n } else {\n return null;\n }\n }\n // FIXME use O(1) search\n if (m == flatCoordinates[offset + stride - 1]) {\n return flatCoordinates.slice(offset, offset + stride);\n }\n let lo = offset / stride;\n let hi = end / stride;\n while (lo < hi) {\n const mid = (lo + hi) >> 1;\n if (m < flatCoordinates[(mid + 1) * stride - 1]) {\n hi = mid;\n } else {\n lo = mid + 1;\n }\n }\n const m0 = flatCoordinates[lo * stride - 1];\n if (m == m0) {\n return flatCoordinates.slice((lo - 1) * stride, (lo - 1) * stride + stride);\n }\n const m1 = flatCoordinates[(lo + 1) * stride - 1];\n const t = (m - m0) / (m1 - m0);\n coordinate = [];\n for (let i = 0; i < stride - 1; ++i) {\n coordinate.push(lerp(flatCoordinates[(lo - 1) * stride + i],\n flatCoordinates[lo * stride + i], t));\n }\n coordinate.push(m);\n return coordinate;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {number} m M.\n * @param {boolean} extrapolate Extrapolate.\n * @param {boolean} interpolate Interpolate.\n * @return {module:ol/coordinate~Coordinate} Coordinate.\n */\nexport function lineStringsCoordinateAtM(\n flatCoordinates, offset, ends, stride, m, extrapolate, interpolate) {\n if (interpolate) {\n return lineStringCoordinateAtM(\n flatCoordinates, offset, ends[ends.length - 1], stride, m, extrapolate);\n }\n let coordinate;\n if (m < flatCoordinates[stride - 1]) {\n if (extrapolate) {\n coordinate = flatCoordinates.slice(0, stride);\n coordinate[stride - 1] = m;\n return coordinate;\n } else {\n return null;\n }\n }\n if (flatCoordinates[flatCoordinates.length - 1] < m) {\n if (extrapolate) {\n coordinate = flatCoordinates.slice(flatCoordinates.length - stride);\n coordinate[stride - 1] = m;\n return coordinate;\n } else {\n return null;\n }\n }\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n if (offset == end) {\n continue;\n }\n if (m < flatCoordinates[offset + stride - 1]) {\n return null;\n } else if (m <= flatCoordinates[end - 1]) {\n return lineStringCoordinateAtM(\n flatCoordinates, offset, end, stride, m, false);\n }\n offset = end;\n }\n return null;\n}\n","/**\n * @module ol/geom/flat/length\n */\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Length.\n */\nexport function lineStringLength(flatCoordinates, offset, end, stride) {\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n let length = 0;\n for (let i = offset + stride; i < end; i += stride) {\n const x2 = flatCoordinates[i];\n const y2 = flatCoordinates[i + 1];\n length += Math.sqrt((x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1));\n x1 = x2;\n y1 = y2;\n }\n return length;\n}\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} Perimeter.\n */\nexport function linearRingLength(flatCoordinates, offset, end, stride) {\n let perimeter = lineStringLength(flatCoordinates, offset, end, stride);\n const dx = flatCoordinates[end - stride] - flatCoordinates[offset];\n const dy = flatCoordinates[end - stride + 1] - flatCoordinates[offset + 1];\n perimeter += Math.sqrt(dx * dx + dy * dy);\n return perimeter;\n}\n","/**\n * @module ol/geom/LineString\n */\nimport {inherits} from '../util.js';\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport SimpleGeometry from '../geom/SimpleGeometry.js';\nimport {assignClosestPoint, maxSquaredDelta} from '../geom/flat/closest.js';\nimport {deflateCoordinates} from '../geom/flat/deflate.js';\nimport {inflateCoordinates} from '../geom/flat/inflate.js';\nimport {interpolatePoint, lineStringCoordinateAtM} from '../geom/flat/interpolate.js';\nimport {intersectsLineString} from '../geom/flat/intersectsextent.js';\nimport {lineStringLength} from '../geom/flat/length.js';\nimport {forEach as forEachSegment} from '../geom/flat/segments.js';\nimport {douglasPeucker} from '../geom/flat/simplify.js';\n\n/**\n * @classdesc\n * Linestring geometry.\n *\n * @constructor\n * @extends {module:ol/geom/SimpleGeometry}\n * @param {Array.<module:ol/coordinate~Coordinate>} coordinates Coordinates.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @api\n */\nconst LineString = function(coordinates, opt_layout) {\n\n SimpleGeometry.call(this);\n\n /**\n * @private\n * @type {module:ol/coordinate~Coordinate}\n */\n this.flatMidpoint_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.flatMidpointRevision_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n this.setCoordinates(coordinates, opt_layout);\n\n};\n\ninherits(LineString, SimpleGeometry);\n\n\n/**\n * Append the passed coordinate to the coordinates of the linestring.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @api\n */\nLineString.prototype.appendCoordinate = function(coordinate) {\n if (!this.flatCoordinates) {\n this.flatCoordinates = coordinate.slice();\n } else {\n extend(this.flatCoordinates, coordinate);\n }\n this.changed();\n};\n\n\n/**\n * Make a complete copy of the geometry.\n * @return {!module:ol/geom/LineString} Clone.\n * @override\n * @api\n */\nLineString.prototype.clone = function() {\n const lineString = new LineString(null);\n lineString.setFlatCoordinates(this.layout, this.flatCoordinates.slice());\n return lineString;\n};\n\n\n/**\n * @inheritDoc\n */\nLineString.prototype.closestPointXY = function(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(maxSquaredDelta(\n this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, 0));\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestPoint(\n this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n this.maxDelta_, false, x, y, closestPoint, minSquaredDistance);\n};\n\n\n/**\n * Iterate over each segment, calling the provided callback.\n * If the callback returns a truthy value the function returns that\n * value immediately. Otherwise the function returns `false`.\n *\n * @param {function(this: S, module:ol/coordinate~Coordinate, module:ol/coordinate~Coordinate): T} callback Function\n * called for each segment.\n * @return {T|boolean} Value.\n * @template T,S\n * @api\n */\nLineString.prototype.forEachSegment = function(callback) {\n return forEachSegment(this.flatCoordinates, 0, this.flatCoordinates.length, this.stride, callback);\n};\n\n\n/**\n * Returns the coordinate at `m` using linear interpolation, or `null` if no\n * such coordinate exists.\n *\n * `opt_extrapolate` controls extrapolation beyond the range of Ms in the\n * MultiLineString. If `opt_extrapolate` is `true` then Ms less than the first\n * M will return the first coordinate and Ms greater than the last M will\n * return the last coordinate.\n *\n * @param {number} m M.\n * @param {boolean=} opt_extrapolate Extrapolate. Default is `false`.\n * @return {module:ol/coordinate~Coordinate} Coordinate.\n * @api\n */\nLineString.prototype.getCoordinateAtM = function(m, opt_extrapolate) {\n if (this.layout != GeometryLayout.XYM &&\n this.layout != GeometryLayout.XYZM) {\n return null;\n }\n const extrapolate = opt_extrapolate !== undefined ? opt_extrapolate : false;\n return lineStringCoordinateAtM(this.flatCoordinates, 0,\n this.flatCoordinates.length, this.stride, m, extrapolate);\n};\n\n\n/**\n * Return the coordinates of the linestring.\n * @return {Array.<module:ol/coordinate~Coordinate>} Coordinates.\n * @override\n * @api\n */\nLineString.prototype.getCoordinates = function() {\n return inflateCoordinates(\n this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n};\n\n\n/**\n * Return the coordinate at the provided fraction along the linestring.\n * The `fraction` is a number between 0 and 1, where 0 is the start of the\n * linestring and 1 is the end.\n * @param {number} fraction Fraction.\n * @param {module:ol/coordinate~Coordinate=} opt_dest Optional coordinate whose values will\n * be modified. If not provided, a new coordinate will be returned.\n * @return {module:ol/coordinate~Coordinate} Coordinate of the interpolated point.\n * @api\n */\nLineString.prototype.getCoordinateAt = function(fraction, opt_dest) {\n return interpolatePoint(\n this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n fraction, opt_dest);\n};\n\n\n/**\n * Return the length of the linestring on projected plane.\n * @return {number} Length (on projected plane).\n * @api\n */\nLineString.prototype.getLength = function() {\n return lineStringLength(\n this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n};\n\n\n/**\n * @return {Array.<number>} Flat midpoint.\n */\nLineString.prototype.getFlatMidpoint = function() {\n if (this.flatMidpointRevision_ != this.getRevision()) {\n this.flatMidpoint_ = this.getCoordinateAt(0.5, this.flatMidpoint_);\n this.flatMidpointRevision_ = this.getRevision();\n }\n return this.flatMidpoint_;\n};\n\n\n/**\n * @inheritDoc\n */\nLineString.prototype.getSimplifiedGeometryInternal = function(squaredTolerance) {\n const simplifiedFlatCoordinates = [];\n simplifiedFlatCoordinates.length = douglasPeucker(\n this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n squaredTolerance, simplifiedFlatCoordinates, 0);\n const simplifiedLineString = new LineString(null);\n simplifiedLineString.setFlatCoordinates(\n GeometryLayout.XY, simplifiedFlatCoordinates);\n return simplifiedLineString;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nLineString.prototype.getType = function() {\n return GeometryType.LINE_STRING;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nLineString.prototype.intersectsExtent = function(extent) {\n return intersectsLineString(\n this.flatCoordinates, 0, this.flatCoordinates.length, this.stride,\n extent);\n};\n\n\n/**\n * Set the coordinates of the linestring.\n * @param {Array.<module:ol/coordinate~Coordinate>} coordinates Coordinates.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @override\n * @api\n */\nLineString.prototype.setCoordinates = function(coordinates, opt_layout) {\n if (!coordinates) {\n this.setFlatCoordinates(GeometryLayout.XY, null);\n } else {\n this.setLayout(opt_layout, coordinates, 1);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinates(\n this.flatCoordinates, 0, coordinates, this.stride);\n this.changed();\n }\n};\n\n\n/**\n * @param {module:ol/geom/GeometryLayout} layout Layout.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n */\nLineString.prototype.setFlatCoordinates = function(layout, flatCoordinates) {\n this.setFlatCoordinatesInternal(layout, flatCoordinates);\n this.changed();\n};\nexport default LineString;\n","/**\n * @module ol/geom/flat/geodesic\n */\nimport {squaredSegmentDistance, toRadians, toDegrees} from '../../math.js';\nimport {get as getProjection, getTransform} from '../../proj.js';\n\n\n/**\n * @param {function(number): module:ol/coordinate~Coordinate} interpolate Interpolate function.\n * @param {module:ol/proj~TransformFunction} transform Transform from longitude/latitude to\n * projected coordinates.\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Array.<number>} Flat coordinates.\n */\nfunction line(interpolate, transform, squaredTolerance) {\n // FIXME reduce garbage generation\n // FIXME optimize stack operations\n\n /** @type {Array.<number>} */\n const flatCoordinates = [];\n\n let geoA = interpolate(0);\n let geoB = interpolate(1);\n\n let a = transform(geoA);\n let b = transform(geoB);\n\n /** @type {Array.<module:ol/coordinate~Coordinate>} */\n const geoStack = [geoB, geoA];\n /** @type {Array.<module:ol/coordinate~Coordinate>} */\n const stack = [b, a];\n /** @type {Array.<number>} */\n const fractionStack = [1, 0];\n\n /** @type {!Object.<string, boolean>} */\n const fractions = {};\n\n let maxIterations = 1e5;\n let geoM, m, fracA, fracB, fracM, key;\n\n while (--maxIterations > 0 && fractionStack.length > 0) {\n // Pop the a coordinate off the stack\n fracA = fractionStack.pop();\n geoA = geoStack.pop();\n a = stack.pop();\n // Add the a coordinate if it has not been added yet\n key = fracA.toString();\n if (!(key in fractions)) {\n flatCoordinates.push(a[0], a[1]);\n fractions[key] = true;\n }\n // Pop the b coordinate off the stack\n fracB = fractionStack.pop();\n geoB = geoStack.pop();\n b = stack.pop();\n // Find the m point between the a and b coordinates\n fracM = (fracA + fracB) / 2;\n geoM = interpolate(fracM);\n m = transform(geoM);\n if (squaredSegmentDistance(m[0], m[1], a[0], a[1],\n b[0], b[1]) < squaredTolerance) {\n // If the m point is sufficiently close to the straight line, then we\n // discard it. Just use the b coordinate and move on to the next line\n // segment.\n flatCoordinates.push(b[0], b[1]);\n key = fracB.toString();\n fractions[key] = true;\n } else {\n // Otherwise, we need to subdivide the current line segment. Split it\n // into two and push the two line segments onto the stack.\n fractionStack.push(fracB, fracM, fracM, fracA);\n stack.push(b, m, m, a);\n geoStack.push(geoB, geoM, geoM, geoA);\n }\n }\n\n return flatCoordinates;\n}\n\n\n/**\n * Generate a great-circle arcs between two lat/lon points.\n * @param {number} lon1 Longitude 1 in degrees.\n * @param {number} lat1 Latitude 1 in degrees.\n * @param {number} lon2 Longitude 2 in degrees.\n * @param {number} lat2 Latitude 2 in degrees.\n * @param {module:ol/proj/Projection} projection Projection.\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Array.<number>} Flat coordinates.\n */\nexport function greatCircleArc(lon1, lat1, lon2, lat2, projection, squaredTolerance) {\n const geoProjection = getProjection('EPSG:4326');\n\n const cosLat1 = Math.cos(toRadians(lat1));\n const sinLat1 = Math.sin(toRadians(lat1));\n const cosLat2 = Math.cos(toRadians(lat2));\n const sinLat2 = Math.sin(toRadians(lat2));\n const cosDeltaLon = Math.cos(toRadians(lon2 - lon1));\n const sinDeltaLon = Math.sin(toRadians(lon2 - lon1));\n const d = sinLat1 * sinLat2 + cosLat1 * cosLat2 * cosDeltaLon;\n\n return line(\n /**\n * @param {number} frac Fraction.\n * @return {module:ol/coordinate~Coordinate} Coordinate.\n */\n function(frac) {\n if (1 <= d) {\n return [lon2, lat2];\n }\n const D = frac * Math.acos(d);\n const cosD = Math.cos(D);\n const sinD = Math.sin(D);\n const y = sinDeltaLon * cosLat2;\n const x = cosLat1 * sinLat2 - sinLat1 * cosLat2 * cosDeltaLon;\n const theta = Math.atan2(y, x);\n const lat = Math.asin(sinLat1 * cosD + cosLat1 * sinD * Math.cos(theta));\n const lon = toRadians(lon1) +\n Math.atan2(Math.sin(theta) * sinD * cosLat1,\n cosD - sinLat1 * Math.sin(lat));\n return [toDegrees(lon), toDegrees(lat)];\n }, getTransform(geoProjection, projection), squaredTolerance);\n}\n\n\n/**\n * Generate a meridian (line at constant longitude).\n * @param {number} lon Longitude.\n * @param {number} lat1 Latitude 1.\n * @param {number} lat2 Latitude 2.\n * @param {module:ol/proj/Projection} projection Projection.\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Array.<number>} Flat coordinates.\n */\nexport function meridian(lon, lat1, lat2, projection, squaredTolerance) {\n const epsg4326Projection = getProjection('EPSG:4326');\n return line(\n /**\n * @param {number} frac Fraction.\n * @return {module:ol/coordinate~Coordinate} Coordinate.\n */\n function(frac) {\n return [lon, lat1 + ((lat2 - lat1) * frac)];\n },\n getTransform(epsg4326Projection, projection), squaredTolerance);\n}\n\n\n/**\n * Generate a parallel (line at constant latitude).\n * @param {number} lat Latitude.\n * @param {number} lon1 Longitude 1.\n * @param {number} lon2 Longitude 2.\n * @param {module:ol/proj/Projection} projection Projection.\n * @param {number} squaredTolerance Squared tolerance.\n * @return {Array.<number>} Flat coordinates.\n */\nexport function parallel(lat, lon1, lon2, projection, squaredTolerance) {\n const epsg4326Projection = getProjection('EPSG:4326');\n return line(\n /**\n * @param {number} frac Fraction.\n * @return {module:ol/coordinate~Coordinate} Coordinate.\n */\n function(frac) {\n return [lon1 + ((lon2 - lon1) * frac), lat];\n },\n getTransform(epsg4326Projection, projection), squaredTolerance);\n}\n","/**\n * @module ol/render/EventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * @event module:ol/render/Event~RenderEvent#postcompose\n * @api\n */\n POSTCOMPOSE: 'postcompose',\n /**\n * @event module:ol/render/Event~RenderEvent#precompose\n * @api\n */\n PRECOMPOSE: 'precompose',\n /**\n * @event module:ol/render/Event~RenderEvent#render\n * @api\n */\n RENDER: 'render'\n};\n","/**\n * @module ol/style/TextPlacement\n */\n\n/**\n * Text placement. One of `'point'`, `'line'`. Default is `'point'`. Note that\n * `'line'` requires the underlying geometry to be a {@link module:ol/geom/LineString~LineString},\n * {@link module:ol/geom/Polygon~Polygon}, {@link module:ol/geom/MultiLineString~MultiLineString} or\n * {@link module:ol/geom/MultiPolygon~MultiPolygon}.\n * @enum {string}\n */\nexport default {\n POINT: 'point',\n LINE: 'line'\n};\n","/**\n * @module ol/style/Text\n */\nimport Fill from '../style/Fill.js';\nimport TextPlacement from '../style/TextPlacement.js';\n\n\n/**\n * The default fill color to use if no fill was set at construction time; a\n * blackish `#333`.\n *\n * @const {string}\n */\nconst DEFAULT_FILL_COLOR = '#333';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [font] Font style as CSS 'font' value, see:\n * {@link https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/font}. Default is '10px sans-serif'\n * @property {number} [maxAngle] When `placement` is set to `'line'`, allow a maximum angle between adjacent characters.\n * The expected value is in radians, and the default is 45° (`Math.PI / 4`).\n * @property {number} [offsetX=0] Horizontal text offset in pixels. A positive will shift the text right.\n * @property {number} [offsetY=0] Vertical text offset in pixels. A positive will shift the text down.\n * @property {boolean} [overflow=false] For polygon labels or when `placement` is set to `'line'`, allow text to exceed\n * the width of the polygon at the label position or the length of the path that it follows.\n * @property {module:ol/style/TextPlacement|string} [placement] Text placement.\n * @property {number} [scale] Scale.\n * @property {boolean} [rotateWithView=false] Whether to rotate the text with the view.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {string} [text] Text content.\n * @property {string} [textAlign] Text alignment. Possible values: 'left', 'right', 'center', 'end' or 'start'.\n * Default is 'center' for `placement: 'point'`. For `placement: 'line'`, the default is to let the renderer choose a\n * placement where `maxAngle` is not exceeded.\n * @property {string} [textBaseline='middle'] Text base line. Possible values: 'bottom', 'top', 'middle', 'alphabetic',\n * 'hanging', 'ideographic'.\n * @property {module:ol/style/Fill} [fill] Fill style. If none is provided, we'll use a dark fill-style (#333).\n * @property {module:ol/style/Stroke} [stroke] Stroke style.\n * @property {module:ol/style/Fill} [backgroundFill] Fill style for the text background when `placement` is\n * `'point'`. Default is no fill.\n * @property {module:ol/style/Stroke} [backgroundStroke] Stroke style for the text background when `placement`\n * is `'point'`. Default is no stroke.\n * @property {Array.<number>} [padding=[0, 0, 0, 0]] Padding in pixels around the text for decluttering and background. The order of\n * values in the array is `[top, right, bottom, left]`.\n */\n\n\n/**\n * @classdesc\n * Set text style for vector features.\n *\n * @constructor\n * @param {module:ol/style/Text~Options=} opt_options Options.\n * @api\n */\nconst Text = function(opt_options) {\n\n const options = opt_options || {};\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.font_ = options.font;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.rotation_ = options.rotation;\n\n /**\n * @private\n * @type {boolean|undefined}\n */\n this.rotateWithView_ = options.rotateWithView;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.scale_ = options.scale;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.text_ = options.text;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.textAlign_ = options.textAlign;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.textBaseline_ = options.textBaseline;\n\n /**\n * @private\n * @type {module:ol/style/Fill}\n */\n this.fill_ = options.fill !== undefined ? options.fill :\n new Fill({color: DEFAULT_FILL_COLOR});\n\n /**\n * @private\n * @type {number}\n */\n this.maxAngle_ = options.maxAngle !== undefined ? options.maxAngle : Math.PI / 4;\n\n /**\n * @private\n * @type {module:ol/style/TextPlacement|string}\n */\n this.placement_ = options.placement !== undefined ? options.placement : TextPlacement.POINT;\n\n /**\n * @private\n * @type {boolean}\n */\n this.overflow_ = !!options.overflow;\n\n /**\n * @private\n * @type {module:ol/style/Stroke}\n */\n this.stroke_ = options.stroke !== undefined ? options.stroke : null;\n\n /**\n * @private\n * @type {number}\n */\n this.offsetX_ = options.offsetX !== undefined ? options.offsetX : 0;\n\n /**\n * @private\n * @type {number}\n */\n this.offsetY_ = options.offsetY !== undefined ? options.offsetY : 0;\n\n /**\n * @private\n * @type {module:ol/style/Fill}\n */\n this.backgroundFill_ = options.backgroundFill ? options.backgroundFill : null;\n\n /**\n * @private\n * @type {module:ol/style/Stroke}\n */\n this.backgroundStroke_ = options.backgroundStroke ? options.backgroundStroke : null;\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.padding_ = options.padding === undefined ? null : options.padding;\n};\n\n\n/**\n * Clones the style.\n * @return {module:ol/style/Text} The cloned style.\n * @api\n */\nText.prototype.clone = function() {\n return new Text({\n font: this.getFont(),\n placement: this.getPlacement(),\n maxAngle: this.getMaxAngle(),\n overflow: this.getOverflow(),\n rotation: this.getRotation(),\n rotateWithView: this.getRotateWithView(),\n scale: this.getScale(),\n text: this.getText(),\n textAlign: this.getTextAlign(),\n textBaseline: this.getTextBaseline(),\n fill: this.getFill() ? this.getFill().clone() : undefined,\n stroke: this.getStroke() ? this.getStroke().clone() : undefined,\n offsetX: this.getOffsetX(),\n offsetY: this.getOffsetY(),\n backgroundFill: this.getBackgroundFill() ? this.getBackgroundFill().clone() : undefined,\n backgroundStroke: this.getBackgroundStroke() ? this.getBackgroundStroke().clone() : undefined\n });\n};\n\n\n/**\n * Get the `overflow` configuration.\n * @return {boolean} Let text overflow the length of the path they follow.\n * @api\n */\nText.prototype.getOverflow = function() {\n return this.overflow_;\n};\n\n\n/**\n * Get the font name.\n * @return {string|undefined} Font.\n * @api\n */\nText.prototype.getFont = function() {\n return this.font_;\n};\n\n\n/**\n * Get the maximum angle between adjacent characters.\n * @return {number} Angle in radians.\n * @api\n */\nText.prototype.getMaxAngle = function() {\n return this.maxAngle_;\n};\n\n\n/**\n * Get the label placement.\n * @return {module:ol/style/TextPlacement|string} Text placement.\n * @api\n */\nText.prototype.getPlacement = function() {\n return this.placement_;\n};\n\n\n/**\n * Get the x-offset for the text.\n * @return {number} Horizontal text offset.\n * @api\n */\nText.prototype.getOffsetX = function() {\n return this.offsetX_;\n};\n\n\n/**\n * Get the y-offset for the text.\n * @return {number} Vertical text offset.\n * @api\n */\nText.prototype.getOffsetY = function() {\n return this.offsetY_;\n};\n\n\n/**\n * Get the fill style for the text.\n * @return {module:ol/style/Fill} Fill style.\n * @api\n */\nText.prototype.getFill = function() {\n return this.fill_;\n};\n\n\n/**\n * Determine whether the text rotates with the map.\n * @return {boolean|undefined} Rotate with map.\n * @api\n */\nText.prototype.getRotateWithView = function() {\n return this.rotateWithView_;\n};\n\n\n/**\n * Get the text rotation.\n * @return {number|undefined} Rotation.\n * @api\n */\nText.prototype.getRotation = function() {\n return this.rotation_;\n};\n\n\n/**\n * Get the text scale.\n * @return {number|undefined} Scale.\n * @api\n */\nText.prototype.getScale = function() {\n return this.scale_;\n};\n\n\n/**\n * Get the stroke style for the text.\n * @return {module:ol/style/Stroke} Stroke style.\n * @api\n */\nText.prototype.getStroke = function() {\n return this.stroke_;\n};\n\n\n/**\n * Get the text to be rendered.\n * @return {string|undefined} Text.\n * @api\n */\nText.prototype.getText = function() {\n return this.text_;\n};\n\n\n/**\n * Get the text alignment.\n * @return {string|undefined} Text align.\n * @api\n */\nText.prototype.getTextAlign = function() {\n return this.textAlign_;\n};\n\n\n/**\n * Get the text baseline.\n * @return {string|undefined} Text baseline.\n * @api\n */\nText.prototype.getTextBaseline = function() {\n return this.textBaseline_;\n};\n\n\n/**\n * Get the background fill style for the text.\n * @return {module:ol/style/Fill} Fill style.\n * @api\n */\nText.prototype.getBackgroundFill = function() {\n return this.backgroundFill_;\n};\n\n\n/**\n * Get the background stroke style for the text.\n * @return {module:ol/style/Stroke} Stroke style.\n * @api\n */\nText.prototype.getBackgroundStroke = function() {\n return this.backgroundStroke_;\n};\n\n\n/**\n * Get the padding for the text.\n * @return {Array.<number>} Padding.\n * @api\n */\nText.prototype.getPadding = function() {\n return this.padding_;\n};\n\n\n/**\n * Set the `overflow` property.\n *\n * @param {boolean} overflow Let text overflow the path that it follows.\n * @api\n */\nText.prototype.setOverflow = function(overflow) {\n this.overflow_ = overflow;\n};\n\n\n/**\n * Set the font.\n *\n * @param {string|undefined} font Font.\n * @api\n */\nText.prototype.setFont = function(font) {\n this.font_ = font;\n};\n\n\n/**\n * Set the maximum angle between adjacent characters.\n *\n * @param {number} maxAngle Angle in radians.\n * @api\n */\nText.prototype.setMaxAngle = function(maxAngle) {\n this.maxAngle_ = maxAngle;\n};\n\n\n/**\n * Set the x offset.\n *\n * @param {number} offsetX Horizontal text offset.\n * @api\n */\nText.prototype.setOffsetX = function(offsetX) {\n this.offsetX_ = offsetX;\n};\n\n\n/**\n * Set the y offset.\n *\n * @param {number} offsetY Vertical text offset.\n * @api\n */\nText.prototype.setOffsetY = function(offsetY) {\n this.offsetY_ = offsetY;\n};\n\n\n/**\n * Set the text placement.\n *\n * @param {module:ol/style/TextPlacement|string} placement Placement.\n * @api\n */\nText.prototype.setPlacement = function(placement) {\n this.placement_ = placement;\n};\n\n\n/**\n * Set the fill.\n *\n * @param {module:ol/style/Fill} fill Fill style.\n * @api\n */\nText.prototype.setFill = function(fill) {\n this.fill_ = fill;\n};\n\n\n/**\n * Set the rotation.\n *\n * @param {number|undefined} rotation Rotation.\n * @api\n */\nText.prototype.setRotation = function(rotation) {\n this.rotation_ = rotation;\n};\n\n\n/**\n * Set the scale.\n *\n * @param {number|undefined} scale Scale.\n * @api\n */\nText.prototype.setScale = function(scale) {\n this.scale_ = scale;\n};\n\n\n/**\n * Set the stroke.\n *\n * @param {module:ol/style/Stroke} stroke Stroke style.\n * @api\n */\nText.prototype.setStroke = function(stroke) {\n this.stroke_ = stroke;\n};\n\n\n/**\n * Set the text.\n *\n * @param {string|undefined} text Text.\n * @api\n */\nText.prototype.setText = function(text) {\n this.text_ = text;\n};\n\n\n/**\n * Set the text alignment.\n *\n * @param {string|undefined} textAlign Text align.\n * @api\n */\nText.prototype.setTextAlign = function(textAlign) {\n this.textAlign_ = textAlign;\n};\n\n\n/**\n * Set the text baseline.\n *\n * @param {string|undefined} textBaseline Text baseline.\n * @api\n */\nText.prototype.setTextBaseline = function(textBaseline) {\n this.textBaseline_ = textBaseline;\n};\n\n\n/**\n * Set the background fill.\n *\n * @param {module:ol/style/Fill} fill Fill style.\n * @api\n */\nText.prototype.setBackgroundFill = function(fill) {\n this.backgroundFill_ = fill;\n};\n\n\n/**\n * Set the background stroke.\n *\n * @param {module:ol/style/Stroke} stroke Stroke style.\n * @api\n */\nText.prototype.setBackgroundStroke = function(stroke) {\n this.backgroundStroke_ = stroke;\n};\n\n\n/**\n * Set the padding (`[top, right, bottom, left]`).\n *\n * @param {!Array.<number>} padding Padding.\n * @api\n */\nText.prototype.setPadding = function(padding) {\n this.padding_ = padding;\n};\nexport default Text;\n","/**\n * @module ol/Graticule\n */\nimport {degreesToStringHDMS} from './coordinate.js';\nimport {listen, unlistenByKey} from './events.js';\nimport {intersects, getCenter} from './extent.js';\nimport GeometryLayout from './geom/GeometryLayout.js';\nimport LineString from './geom/LineString.js';\nimport Point from './geom/Point.js';\nimport {meridian, parallel} from './geom/flat/geodesic.js';\nimport {clamp} from './math.js';\nimport {get as getProjection, equivalent as equivalentProjection, getTransform, transformExtent} from './proj.js';\nimport RenderEventType from './render/EventType.js';\nimport Fill from './style/Fill.js';\nimport Stroke from './style/Stroke.js';\nimport Text from './style/Text.js';\n\n\n/**\n * @type {module:ol/style/Stroke}\n * @private\n * @const\n */\nconst DEFAULT_STROKE_STYLE = new Stroke({\n color: 'rgba(0,0,0,0.2)'\n});\n\n/**\n * TODO can be configurable\n * @type {Array.<number>}\n * @private\n */\nconst INTERVALS = [\n 90, 45, 30, 20, 10, 5, 2, 1, 0.5, 0.2, 0.1, 0.05, 0.01, 0.005, 0.002, 0.001\n];\n\n/**\n * @typedef {Object} GraticuleLabelDataType\n * @property {module:ol/geom/Point} geom\n * @property {string} text\n */\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/PluggableMap} [map] Reference to an\n * {@link module:ol/Map~Map} object.\n * @property {number} [maxLines=100] The maximum number of meridians and\n * parallels from the center of the map. The default value of 100 means that at\n * most 200 meridians and 200 parallels will be displayed. The default value is\n * appropriate for conformal projections like Spherical Mercator. If you\n * increase the value, more lines will be drawn and the drawing performance will\n * decrease.\n * @property {module:ol/style/Stroke} [strokeStyle='rgba(0,0,0,0.2)'] The\n * stroke style to use for drawing the graticule. If not provided, a not fully\n * opaque black will be used.\n * @property {number} [targetSize=100] The target size of the graticule cells,\n * in pixels.\n * @property {boolean} [showLabels=false] Render a label with the respective\n * latitude/longitude for each graticule line.\n * @property {function(number):string} [lonLabelFormatter] Label formatter for\n * longitudes. This function is called with the longitude as argument, and\n * should return a formatted string representing the longitude. By default,\n * labels are formatted as degrees, minutes, seconds and hemisphere.\n * @property {function(number):string} [latLabelFormatter] Label formatter for\n * latitudes. This function is called with the latitude as argument, and\n * should return a formatted string representing the latitude. By default,\n * labels are formatted as degrees, minutes, seconds and hemisphere.\n * @property {number} [lonLabelPosition=0] Longitude label position in fractions\n * (0..1) of view extent. 0 means at the bottom of the viewport, 1 means at the\n * top.\n * @property {number} [latLabelPosition=1] Latitude label position in fractions\n * (0..1) of view extent. 0 means at the left of the viewport, 1 means at the\n * right.\n * @property {module:ol/style/Text} [lonLabelStyle] Longitude label text\n * style. If not provided, the following style will be used:\n * ```js\n * new Text({\n * font: '12px Calibri,sans-serif',\n * textBaseline: 'bottom',\n * fill: new Fill({\n * color: 'rgba(0,0,0,1)'\n * }),\n * stroke: new Stroke({\n * color: 'rgba(255,255,255,1)',\n * width: 3\n * })\n * });\n * ```\n * Note that the default's `textBaseline` configuration will not work well for\n * `lonLabelPosition` configurations that position labels close to the top of\n * the viewport.\n * @property {module:ol/style/Text} [latLabelStyle] Latitude label text style.\n * If not provided, the following style will be used:\n * ```js\n * new Text({\n * font: '12px Calibri,sans-serif',\n * textAlign: 'end',\n * fill: new Fill({\n * color: 'rgba(0,0,0,1)'\n * }),\n * stroke: Stroke({\n * color: 'rgba(255,255,255,1)',\n * width: 3\n * })\n * });\n * ```\n * Note that the default's `textAlign` configuration will not work well for\n * `latLabelPosition` configurations that position labels close to the left of\n * the viewport.\n */\n\n\n/**\n * Render a grid for a coordinate system on a map.\n * @constructor\n * @param {module:ol/Graticule~Options=} opt_options Options.\n * @api\n */\nconst Graticule = function(opt_options) {\n const options = opt_options || {};\n\n /**\n * @type {module:ol/PluggableMap}\n * @private\n */\n this.map_ = null;\n\n /**\n * @type {?module:ol/events~EventsKey}\n * @private\n */\n this.postcomposeListenerKey_ = null;\n\n /**\n * @type {module:ol/proj/Projection}\n */\n this.projection_ = null;\n\n /**\n * @type {number}\n * @private\n */\n this.maxLat_ = Infinity;\n\n /**\n * @type {number}\n * @private\n */\n this.maxLon_ = Infinity;\n\n /**\n * @type {number}\n * @private\n */\n this.minLat_ = -Infinity;\n\n /**\n * @type {number}\n * @private\n */\n this.minLon_ = -Infinity;\n\n /**\n * @type {number}\n * @private\n */\n this.maxLatP_ = Infinity;\n\n /**\n * @type {number}\n * @private\n */\n this.maxLonP_ = Infinity;\n\n /**\n * @type {number}\n * @private\n */\n this.minLatP_ = -Infinity;\n\n /**\n * @type {number}\n * @private\n */\n this.minLonP_ = -Infinity;\n\n /**\n * @type {number}\n * @private\n */\n this.targetSize_ = options.targetSize !== undefined ? options.targetSize : 100;\n\n /**\n * @type {number}\n * @private\n */\n this.maxLines_ = options.maxLines !== undefined ? options.maxLines : 100;\n\n /**\n * @type {Array.<module:ol/geom/LineString>}\n * @private\n */\n this.meridians_ = [];\n\n /**\n * @type {Array.<module:ol/geom/LineString>}\n * @private\n */\n this.parallels_ = [];\n\n /**\n * @type {module:ol/style/Stroke}\n * @private\n */\n this.strokeStyle_ = options.strokeStyle !== undefined ? options.strokeStyle : DEFAULT_STROKE_STYLE;\n\n /**\n * @type {module:ol/proj~TransformFunction|undefined}\n * @private\n */\n this.fromLonLatTransform_ = undefined;\n\n /**\n * @type {module:ol/proj~TransformFunction|undefined}\n * @private\n */\n this.toLonLatTransform_ = undefined;\n\n /**\n * @type {module:ol/coordinate~Coordinate}\n * @private\n */\n this.projectionCenterLonLat_ = null;\n\n /**\n * @type {Array.<module:ol/Graticule~GraticuleLabelDataType>}\n * @private\n */\n this.meridiansLabels_ = null;\n\n /**\n * @type {Array.<module:ol/Graticule~GraticuleLabelDataType>}\n * @private\n */\n this.parallelsLabels_ = null;\n\n if (options.showLabels == true) {\n\n /**\n * @type {null|function(number):string}\n * @private\n */\n this.lonLabelFormatter_ = options.lonLabelFormatter == undefined ?\n degreesToStringHDMS.bind(this, 'EW') : options.lonLabelFormatter;\n\n /**\n * @type {function(number):string}\n * @private\n */\n this.latLabelFormatter_ = options.latLabelFormatter == undefined ?\n degreesToStringHDMS.bind(this, 'NS') : options.latLabelFormatter;\n\n /**\n * Longitude label position in fractions (0..1) of view extent. 0 means\n * bottom, 1 means top.\n * @type {number}\n * @private\n */\n this.lonLabelPosition_ = options.lonLabelPosition == undefined ? 0 :\n options.lonLabelPosition;\n\n /**\n * Latitude Label position in fractions (0..1) of view extent. 0 means left, 1\n * means right.\n * @type {number}\n * @private\n */\n this.latLabelPosition_ = options.latLabelPosition == undefined ? 1 :\n options.latLabelPosition;\n\n /**\n * @type {module:ol/style/Text}\n * @private\n */\n this.lonLabelStyle_ = options.lonLabelStyle !== undefined ? options.lonLabelStyle :\n new Text({\n font: '12px Calibri,sans-serif',\n textBaseline: 'bottom',\n fill: new Fill({\n color: 'rgba(0,0,0,1)'\n }),\n stroke: new Stroke({\n color: 'rgba(255,255,255,1)',\n width: 3\n })\n });\n\n /**\n * @type {module:ol/style/Text}\n * @private\n */\n this.latLabelStyle_ = options.latLabelStyle !== undefined ? options.latLabelStyle :\n new Text({\n font: '12px Calibri,sans-serif',\n textAlign: 'end',\n fill: new Fill({\n color: 'rgba(0,0,0,1)'\n }),\n stroke: new Stroke({\n color: 'rgba(255,255,255,1)',\n width: 3\n })\n });\n\n this.meridiansLabels_ = [];\n this.parallelsLabels_ = [];\n }\n\n this.setMap(options.map !== undefined ? options.map : null);\n};\n\n\n/**\n * @param {number} lon Longitude.\n * @param {number} minLat Minimal latitude.\n * @param {number} maxLat Maximal latitude.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} index Index.\n * @return {number} Index.\n * @private\n */\nGraticule.prototype.addMeridian_ = function(lon, minLat, maxLat, squaredTolerance, extent, index) {\n const lineString = this.getMeridian_(lon, minLat, maxLat, squaredTolerance, index);\n if (intersects(lineString.getExtent(), extent)) {\n if (this.meridiansLabels_) {\n const textPoint = this.getMeridianPoint_(lineString, extent, index);\n this.meridiansLabels_[index] = {\n geom: textPoint,\n text: this.lonLabelFormatter_(lon)\n };\n }\n this.meridians_[index++] = lineString;\n }\n return index;\n};\n\n/**\n * @param {module:ol/geom/LineString} lineString Meridian\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} index Index.\n * @return {module:ol/geom/Point} Meridian point.\n * @private\n */\nGraticule.prototype.getMeridianPoint_ = function(lineString, extent, index) {\n const flatCoordinates = lineString.getFlatCoordinates();\n const clampedBottom = Math.max(extent[1], flatCoordinates[1]);\n const clampedTop = Math.min(extent[3], flatCoordinates[flatCoordinates.length - 1]);\n const lat = clamp(\n extent[1] + Math.abs(extent[1] - extent[3]) * this.lonLabelPosition_,\n clampedBottom, clampedTop);\n const coordinate = [flatCoordinates[0], lat];\n const point = this.meridiansLabels_[index] !== undefined ?\n this.meridiansLabels_[index].geom : new Point(null);\n point.setCoordinates(coordinate);\n return point;\n};\n\n\n/**\n * @param {number} lat Latitude.\n * @param {number} minLon Minimal longitude.\n * @param {number} maxLon Maximal longitude.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} index Index.\n * @return {number} Index.\n * @private\n */\nGraticule.prototype.addParallel_ = function(lat, minLon, maxLon, squaredTolerance, extent, index) {\n const lineString = this.getParallel_(lat, minLon, maxLon, squaredTolerance, index);\n if (intersects(lineString.getExtent(), extent)) {\n if (this.parallelsLabels_) {\n const textPoint = this.getParallelPoint_(lineString, extent, index);\n this.parallelsLabels_[index] = {\n geom: textPoint,\n text: this.latLabelFormatter_(lat)\n };\n }\n this.parallels_[index++] = lineString;\n }\n return index;\n};\n\n\n/**\n * @param {module:ol/geom/LineString} lineString Parallels.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} index Index.\n * @return {module:ol/geom/Point} Parallel point.\n * @private\n */\nGraticule.prototype.getParallelPoint_ = function(lineString, extent, index) {\n const flatCoordinates = lineString.getFlatCoordinates();\n const clampedLeft = Math.max(extent[0], flatCoordinates[0]);\n const clampedRight = Math.min(extent[2], flatCoordinates[flatCoordinates.length - 2]);\n const lon = clamp(\n extent[0] + Math.abs(extent[0] - extent[2]) * this.latLabelPosition_,\n clampedLeft, clampedRight);\n const coordinate = [lon, flatCoordinates[1]];\n const point = this.parallelsLabels_[index] !== undefined ?\n this.parallelsLabels_[index].geom : new Point(null);\n point.setCoordinates(coordinate);\n return point;\n};\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {module:ol/coordinate~Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} squaredTolerance Squared tolerance.\n * @private\n */\nGraticule.prototype.createGraticule_ = function(extent, center, resolution, squaredTolerance) {\n\n const interval = this.getInterval_(resolution);\n if (interval == -1) {\n this.meridians_.length = this.parallels_.length = 0;\n if (this.meridiansLabels_) {\n this.meridiansLabels_.length = 0;\n }\n if (this.parallelsLabels_) {\n this.parallelsLabels_.length = 0;\n }\n return;\n }\n\n const centerLonLat = this.toLonLatTransform_(center);\n let centerLon = centerLonLat[0];\n let centerLat = centerLonLat[1];\n const maxLines = this.maxLines_;\n let cnt, idx, lat, lon;\n\n let validExtent = [\n Math.max(extent[0], this.minLonP_),\n Math.max(extent[1], this.minLatP_),\n Math.min(extent[2], this.maxLonP_),\n Math.min(extent[3], this.maxLatP_)\n ];\n\n validExtent = transformExtent(validExtent, this.projection_, 'EPSG:4326');\n const maxLat = validExtent[3];\n const maxLon = validExtent[2];\n const minLat = validExtent[1];\n const minLon = validExtent[0];\n\n // Create meridians\n\n centerLon = Math.floor(centerLon / interval) * interval;\n lon = clamp(centerLon, this.minLon_, this.maxLon_);\n\n idx = this.addMeridian_(lon, minLat, maxLat, squaredTolerance, extent, 0);\n\n cnt = 0;\n while (lon != this.minLon_ && cnt++ < maxLines) {\n lon = Math.max(lon - interval, this.minLon_);\n idx = this.addMeridian_(lon, minLat, maxLat, squaredTolerance, extent, idx);\n }\n\n lon = clamp(centerLon, this.minLon_, this.maxLon_);\n\n cnt = 0;\n while (lon != this.maxLon_ && cnt++ < maxLines) {\n lon = Math.min(lon + interval, this.maxLon_);\n idx = this.addMeridian_(lon, minLat, maxLat, squaredTolerance, extent, idx);\n }\n\n this.meridians_.length = idx;\n if (this.meridiansLabels_) {\n this.meridiansLabels_.length = idx;\n }\n\n // Create parallels\n\n centerLat = Math.floor(centerLat / interval) * interval;\n lat = clamp(centerLat, this.minLat_, this.maxLat_);\n\n idx = this.addParallel_(lat, minLon, maxLon, squaredTolerance, extent, 0);\n\n cnt = 0;\n while (lat != this.minLat_ && cnt++ < maxLines) {\n lat = Math.max(lat - interval, this.minLat_);\n idx = this.addParallel_(lat, minLon, maxLon, squaredTolerance, extent, idx);\n }\n\n lat = clamp(centerLat, this.minLat_, this.maxLat_);\n\n cnt = 0;\n while (lat != this.maxLat_ && cnt++ < maxLines) {\n lat = Math.min(lat + interval, this.maxLat_);\n idx = this.addParallel_(lat, minLon, maxLon, squaredTolerance, extent, idx);\n }\n\n this.parallels_.length = idx;\n if (this.parallelsLabels_) {\n this.parallelsLabels_.length = idx;\n }\n\n};\n\n\n/**\n * @param {number} resolution Resolution.\n * @return {number} The interval in degrees.\n * @private\n */\nGraticule.prototype.getInterval_ = function(resolution) {\n const centerLon = this.projectionCenterLonLat_[0];\n const centerLat = this.projectionCenterLonLat_[1];\n let interval = -1;\n const target = Math.pow(this.targetSize_ * resolution, 2);\n /** @type {Array.<number>} **/\n const p1 = [];\n /** @type {Array.<number>} **/\n const p2 = [];\n for (let i = 0, ii = INTERVALS.length; i < ii; ++i) {\n const delta = INTERVALS[i] / 2;\n p1[0] = centerLon - delta;\n p1[1] = centerLat - delta;\n p2[0] = centerLon + delta;\n p2[1] = centerLat + delta;\n this.fromLonLatTransform_(p1, p1);\n this.fromLonLatTransform_(p2, p2);\n const dist = Math.pow(p2[0] - p1[0], 2) + Math.pow(p2[1] - p1[1], 2);\n if (dist <= target) {\n break;\n }\n interval = INTERVALS[i];\n }\n return interval;\n};\n\n\n/**\n * Get the map associated with this graticule.\n * @return {module:ol/PluggableMap} The map.\n * @api\n */\nGraticule.prototype.getMap = function() {\n return this.map_;\n};\n\n\n/**\n * @param {number} lon Longitude.\n * @param {number} minLat Minimal latitude.\n * @param {number} maxLat Maximal latitude.\n * @param {number} squaredTolerance Squared tolerance.\n * @return {module:ol/geom/LineString} The meridian line string.\n * @param {number} index Index.\n * @private\n */\nGraticule.prototype.getMeridian_ = function(lon, minLat, maxLat, squaredTolerance, index) {\n const flatCoordinates = meridian(lon, minLat, maxLat, this.projection_, squaredTolerance);\n const lineString = this.meridians_[index] !== undefined ? this.meridians_[index] : new LineString(null);\n lineString.setFlatCoordinates(GeometryLayout.XY, flatCoordinates);\n return lineString;\n};\n\n\n/**\n * Get the list of meridians. Meridians are lines of equal longitude.\n * @return {Array.<module:ol/geom/LineString>} The meridians.\n * @api\n */\nGraticule.prototype.getMeridians = function() {\n return this.meridians_;\n};\n\n\n/**\n * @param {number} lat Latitude.\n * @param {number} minLon Minimal longitude.\n * @param {number} maxLon Maximal longitude.\n * @param {number} squaredTolerance Squared tolerance.\n * @return {module:ol/geom/LineString} The parallel line string.\n * @param {number} index Index.\n * @private\n */\nGraticule.prototype.getParallel_ = function(lat, minLon, maxLon, squaredTolerance, index) {\n const flatCoordinates = parallel(lat, minLon, maxLon, this.projection_, squaredTolerance);\n const lineString = this.parallels_[index] !== undefined ? this.parallels_[index] : new LineString(null);\n lineString.setFlatCoordinates(GeometryLayout.XY, flatCoordinates);\n return lineString;\n};\n\n\n/**\n * Get the list of parallels. Parallels are lines of equal latitude.\n * @return {Array.<module:ol/geom/LineString>} The parallels.\n * @api\n */\nGraticule.prototype.getParallels = function() {\n return this.parallels_;\n};\n\n\n/**\n * @param {module:ol/render/Event} e Event.\n * @private\n */\nGraticule.prototype.handlePostCompose_ = function(e) {\n const vectorContext = e.vectorContext;\n const frameState = e.frameState;\n const extent = frameState.extent;\n const viewState = frameState.viewState;\n const center = viewState.center;\n const projection = viewState.projection;\n const resolution = viewState.resolution;\n const pixelRatio = frameState.pixelRatio;\n const squaredTolerance =\n resolution * resolution / (4 * pixelRatio * pixelRatio);\n\n const updateProjectionInfo = !this.projection_ ||\n !equivalentProjection(this.projection_, projection);\n\n if (updateProjectionInfo) {\n this.updateProjectionInfo_(projection);\n }\n\n this.createGraticule_(extent, center, resolution, squaredTolerance);\n\n // Draw the lines\n vectorContext.setFillStrokeStyle(null, this.strokeStyle_);\n let i, l, line;\n for (i = 0, l = this.meridians_.length; i < l; ++i) {\n line = this.meridians_[i];\n vectorContext.drawGeometry(line);\n }\n for (i = 0, l = this.parallels_.length; i < l; ++i) {\n line = this.parallels_[i];\n vectorContext.drawGeometry(line);\n }\n let labelData;\n if (this.meridiansLabels_) {\n for (i = 0, l = this.meridiansLabels_.length; i < l; ++i) {\n labelData = this.meridiansLabels_[i];\n this.lonLabelStyle_.setText(labelData.text);\n vectorContext.setTextStyle(this.lonLabelStyle_);\n vectorContext.drawGeometry(labelData.geom);\n }\n }\n if (this.parallelsLabels_) {\n for (i = 0, l = this.parallelsLabels_.length; i < l; ++i) {\n labelData = this.parallelsLabels_[i];\n this.latLabelStyle_.setText(labelData.text);\n vectorContext.setTextStyle(this.latLabelStyle_);\n vectorContext.drawGeometry(labelData.geom);\n }\n }\n};\n\n\n/**\n * @param {module:ol/proj/Projection} projection Projection.\n * @private\n */\nGraticule.prototype.updateProjectionInfo_ = function(projection) {\n const epsg4326Projection = getProjection('EPSG:4326');\n\n const worldExtent = projection.getWorldExtent();\n const worldExtentP = transformExtent(worldExtent, epsg4326Projection, projection);\n\n this.maxLat_ = worldExtent[3];\n this.maxLon_ = worldExtent[2];\n this.minLat_ = worldExtent[1];\n this.minLon_ = worldExtent[0];\n\n this.maxLatP_ = worldExtentP[3];\n this.maxLonP_ = worldExtentP[2];\n this.minLatP_ = worldExtentP[1];\n this.minLonP_ = worldExtentP[0];\n\n this.fromLonLatTransform_ = getTransform(epsg4326Projection, projection);\n\n this.toLonLatTransform_ = getTransform(projection, epsg4326Projection);\n\n this.projectionCenterLonLat_ = this.toLonLatTransform_(getCenter(projection.getExtent()));\n\n this.projection_ = projection;\n};\n\n\n/**\n * Set the map for this graticule. The graticule will be rendered on the\n * provided map.\n * @param {module:ol/PluggableMap} map Map.\n * @api\n */\nGraticule.prototype.setMap = function(map) {\n if (this.map_) {\n unlistenByKey(this.postcomposeListenerKey_);\n this.postcomposeListenerKey_ = null;\n this.map_.render();\n }\n if (map) {\n this.postcomposeListenerKey_ = listen(map, RenderEventType.POSTCOMPOSE, this.handlePostCompose_, this);\n map.render();\n }\n this.map_ = map;\n};\nexport default Graticule;\n","/**\n * @module ol/ImageBase\n */\nimport {inherits} from './util.js';\nimport EventTarget from './events/EventTarget.js';\nimport EventType from './events/EventType.js';\n\n/**\n * @constructor\n * @abstract\n * @extends {module:ol/events/EventTarget}\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number|undefined} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/ImageState} state State.\n */\nconst ImageBase = function(extent, resolution, pixelRatio, state) {\n\n EventTarget.call(this);\n\n /**\n * @protected\n * @type {module:ol/extent~Extent}\n */\n this.extent = extent;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ = pixelRatio;\n\n /**\n * @protected\n * @type {number|undefined}\n */\n this.resolution = resolution;\n\n /**\n * @protected\n * @type {module:ol/ImageState}\n */\n this.state = state;\n\n};\n\ninherits(ImageBase, EventTarget);\n\n\n/**\n * @protected\n */\nImageBase.prototype.changed = function() {\n this.dispatchEvent(EventType.CHANGE);\n};\n\n\n/**\n * @return {module:ol/extent~Extent} Extent.\n */\nImageBase.prototype.getExtent = function() {\n return this.extent;\n};\n\n\n/**\n * @abstract\n * @return {HTMLCanvasElement|Image|HTMLVideoElement} Image.\n */\nImageBase.prototype.getImage = function() {};\n\n\n/**\n * @return {number} PixelRatio.\n */\nImageBase.prototype.getPixelRatio = function() {\n return this.pixelRatio_;\n};\n\n\n/**\n * @return {number} Resolution.\n */\nImageBase.prototype.getResolution = function() {\n return /** @type {number} */ (this.resolution);\n};\n\n\n/**\n * @return {module:ol/ImageState} State.\n */\nImageBase.prototype.getState = function() {\n return this.state;\n};\n\n\n/**\n * Load not yet loaded URI.\n * @abstract\n */\nImageBase.prototype.load = function() {};\n\nexport default ImageBase;\n","/**\n * @module ol/Image\n */\nimport {inherits} from './util.js';\nimport ImageBase from './ImageBase.js';\nimport ImageState from './ImageState.js';\nimport {listenOnce, unlistenByKey} from './events.js';\nimport EventType from './events/EventType.js';\nimport {getHeight} from './extent.js';\n\n\n/**\n * A function that takes an {@link module:ol/Image~Image} for the image and a\n * `{string}` for the src as arguments. It is supposed to make it so the\n * underlying image {@link module:ol/Image~Image#getImage} is assigned the\n * content specified by the src. If not specified, the default is\n *\n * function(image, src) {\n * image.getImage().src = src;\n * }\n *\n * Providing a custom `imageLoadFunction` can be useful to load images with\n * post requests or - in general - through XHR requests, where the src of the\n * image element would be set to a data URI when the content is loaded.\n *\n * @typedef {function(module:ol/Image, string)} LoadFunction\n * @api\n */\n\n\n/**\n * @constructor\n * @extends {module:ol/ImageBase}\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number|undefined} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {string} src Image source URI.\n * @param {?string} crossOrigin Cross origin.\n * @param {module:ol/Image~LoadFunction} imageLoadFunction Image load function.\n */\nconst ImageWrapper = function(extent, resolution, pixelRatio, src, crossOrigin, imageLoadFunction) {\n\n ImageBase.call(this, extent, resolution, pixelRatio, ImageState.IDLE);\n\n /**\n * @private\n * @type {string}\n */\n this.src_ = src;\n\n /**\n * @private\n * @type {HTMLCanvasElement|Image|HTMLVideoElement}\n */\n this.image_ = new Image();\n if (crossOrigin !== null) {\n this.image_.crossOrigin = crossOrigin;\n }\n\n /**\n * @private\n * @type {Array.<module:ol/events~EventsKey>}\n */\n this.imageListenerKeys_ = null;\n\n /**\n * @protected\n * @type {module:ol/ImageState}\n */\n this.state = ImageState.IDLE;\n\n /**\n * @private\n * @type {module:ol/Image~LoadFunction}\n */\n this.imageLoadFunction_ = imageLoadFunction;\n\n};\n\ninherits(ImageWrapper, ImageBase);\n\n\n/**\n * @inheritDoc\n * @api\n */\nImageWrapper.prototype.getImage = function() {\n return this.image_;\n};\n\n\n/**\n * Tracks loading or read errors.\n *\n * @private\n */\nImageWrapper.prototype.handleImageError_ = function() {\n this.state = ImageState.ERROR;\n this.unlistenImage_();\n this.changed();\n};\n\n\n/**\n * Tracks successful image load.\n *\n * @private\n */\nImageWrapper.prototype.handleImageLoad_ = function() {\n if (this.resolution === undefined) {\n this.resolution = getHeight(this.extent) / this.image_.height;\n }\n this.state = ImageState.LOADED;\n this.unlistenImage_();\n this.changed();\n};\n\n\n/**\n * Load the image or retry if loading previously failed.\n * Loading is taken care of by the tile queue, and calling this method is\n * only needed for preloading or for reloading in case of an error.\n * @override\n * @api\n */\nImageWrapper.prototype.load = function() {\n if (this.state == ImageState.IDLE || this.state == ImageState.ERROR) {\n this.state = ImageState.LOADING;\n this.changed();\n this.imageListenerKeys_ = [\n listenOnce(this.image_, EventType.ERROR,\n this.handleImageError_, this),\n listenOnce(this.image_, EventType.LOAD,\n this.handleImageLoad_, this)\n ];\n this.imageLoadFunction_(this, this.src_);\n }\n};\n\n\n/**\n * @param {HTMLCanvasElement|Image|HTMLVideoElement} image Image.\n */\nImageWrapper.prototype.setImage = function(image) {\n this.image_ = image;\n};\n\n\n/**\n * Discards event handlers which listen for load completion or errors.\n *\n * @private\n */\nImageWrapper.prototype.unlistenImage_ = function() {\n this.imageListenerKeys_.forEach(unlistenByKey);\n this.imageListenerKeys_ = null;\n};\n\nexport default ImageWrapper;\n","/**\n * @module ol/TileState\n */\n\n/**\n * @enum {number}\n */\nexport default {\n IDLE: 0,\n LOADING: 1,\n LOADED: 2,\n ERROR: 3,\n EMPTY: 4,\n ABORT: 5\n};\n","/**\n * @module ol/easing\n */\n\n\n/**\n * Start slow and speed up.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeIn(t) {\n return Math.pow(t, 3);\n}\n\n\n/**\n * Start fast and slow down.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function easeOut(t) {\n return 1 - easeIn(1 - t);\n}\n\n\n/**\n * Start slow, speed up, and then slow down again.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function inAndOut(t) {\n return 3 * t * t - 2 * t * t * t;\n}\n\n\n/**\n * Maintain a constant speed over time.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function linear(t) {\n return t;\n}\n\n\n/**\n * Start slow, speed up, and at the very end slow down again. This has the\n * same general behavior as {@link module:ol/easing~inAndOut}, but the final\n * slowdown is delayed.\n * @param {number} t Input between 0 and 1.\n * @return {number} Output between 0 and 1.\n * @api\n */\nexport function upAndDown(t) {\n if (t < 0.5) {\n return inAndOut(2 * t);\n } else {\n return 1 - inAndOut(2 * (t - 0.5));\n }\n}\n","/**\n * @module ol/Tile\n */\nimport {inherits} from './util.js';\nimport TileState from './TileState.js';\nimport {easeIn} from './easing.js';\nimport EventTarget from './events/EventTarget.js';\nimport EventType from './events/EventType.js';\n\n\n/**\n * A function that takes an {@link module:ol/Tile} for the tile and a\n * `{string}` for the url as arguments.\n *\n * @typedef {function(module:ol/Tile, string)} LoadFunction\n * @api\n */\n\n/**\n * {@link module:ol/source/Tile~Tile} sources use a function of this type to get\n * the url that provides a tile for a given tile coordinate.\n *\n * This function takes an {@link module:ol/tilecoord~TileCoord} for the tile\n * coordinate, a `{number}` representing the pixel ratio and a\n * {@link module:ol/proj/Projection} for the projection as arguments\n * and returns a `{string}` representing the tile URL, or undefined if no tile\n * should be requested for the passed tile coordinate.\n *\n * @typedef {function(module:ol/tilecoord~TileCoord, number,\n * module:ol/proj/Projection): (string|undefined)} UrlFunction\n * @api\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [transition=250] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n * @api\n */\n\n\n/**\n * @classdesc\n * Base class for tiles.\n *\n * @constructor\n * @abstract\n * @extends {module:ol/events/EventTarget}\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {module:ol/TileState} state State.\n * @param {module:ol/Tile~Options=} opt_options Tile options.\n */\nconst Tile = function(tileCoord, state, opt_options) {\n EventTarget.call(this);\n\n const options = opt_options ? opt_options : {};\n\n /**\n * @type {module:ol/tilecoord~TileCoord}\n */\n this.tileCoord = tileCoord;\n\n /**\n * @protected\n * @type {module:ol/TileState}\n */\n this.state = state;\n\n /**\n * An \"interim\" tile for this tile. The interim tile may be used while this\n * one is loading, for \"smooth\" transitions when changing params/dimensions\n * on the source.\n * @type {module:ol/Tile}\n */\n this.interimTile = null;\n\n /**\n * A key assigned to the tile. This is used by the tile source to determine\n * if this tile can effectively be used, or if a new tile should be created\n * and this one be used as an interim tile for this new tile.\n * @type {string}\n */\n this.key = '';\n\n /**\n * The duration for the opacity transition.\n * @type {number}\n */\n this.transition_ = options.transition === undefined ? 250 : options.transition;\n\n /**\n * Lookup of start times for rendering transitions. If the start time is\n * equal to -1, the transition is complete.\n * @type {Object.<number, number>}\n */\n this.transitionStarts_ = {};\n\n};\n\ninherits(Tile, EventTarget);\n\n\n/**\n * @protected\n */\nTile.prototype.changed = function() {\n this.dispatchEvent(EventType.CHANGE);\n};\n\n\n/**\n * @return {string} Key.\n */\nTile.prototype.getKey = function() {\n return this.key + '/' + this.tileCoord;\n};\n\n/**\n * Get the interim tile most suitable for rendering using the chain of interim\n * tiles. This corresponds to the most recent tile that has been loaded, if no\n * such tile exists, the original tile is returned.\n * @return {!module:ol/Tile} Best tile for rendering.\n */\nTile.prototype.getInterimTile = function() {\n if (!this.interimTile) {\n //empty chain\n return this;\n }\n let tile = this.interimTile;\n\n // find the first loaded tile and return it. Since the chain is sorted in\n // decreasing order of creation time, there is no need to search the remainder\n // of the list (all those tiles correspond to older requests and will be\n // cleaned up by refreshInterimChain)\n do {\n if (tile.getState() == TileState.LOADED) {\n return tile;\n }\n tile = tile.interimTile;\n } while (tile);\n\n // we can not find a better tile\n return this;\n};\n\n/**\n * Goes through the chain of interim tiles and discards sections of the chain\n * that are no longer relevant.\n */\nTile.prototype.refreshInterimChain = function() {\n if (!this.interimTile) {\n return;\n }\n\n let tile = this.interimTile;\n let prev = this;\n\n do {\n if (tile.getState() == TileState.LOADED) {\n //we have a loaded tile, we can discard the rest of the list\n //we would could abort any LOADING tile request\n //older than this tile (i.e. any LOADING tile following this entry in the chain)\n tile.interimTile = null;\n break;\n } else if (tile.getState() == TileState.LOADING) {\n //keep this LOADING tile any loaded tiles later in the chain are\n //older than this tile, so we're still interested in the request\n prev = tile;\n } else if (tile.getState() == TileState.IDLE) {\n //the head of the list is the most current tile, we don't need\n //to start any other requests for this chain\n prev.interimTile = tile.interimTile;\n } else {\n prev = tile;\n }\n tile = prev.interimTile;\n } while (tile);\n};\n\n/**\n * Get the tile coordinate for this tile.\n * @return {module:ol/tilecoord~TileCoord} The tile coordinate.\n * @api\n */\nTile.prototype.getTileCoord = function() {\n return this.tileCoord;\n};\n\n\n/**\n * @return {module:ol/TileState} State.\n */\nTile.prototype.getState = function() {\n return this.state;\n};\n\n/**\n * @param {module:ol/TileState} state State.\n */\nTile.prototype.setState = function(state) {\n this.state = state;\n this.changed();\n};\n\n/**\n * Load the image or retry if loading previously failed.\n * Loading is taken care of by the tile queue, and calling this method is\n * only needed for preloading or for reloading in case of an error.\n * @abstract\n * @api\n */\nTile.prototype.load = function() {};\n\n/**\n * Get the alpha value for rendering.\n * @param {number} id An id for the renderer.\n * @param {number} time The render frame time.\n * @return {number} A number between 0 and 1.\n */\nTile.prototype.getAlpha = function(id, time) {\n if (!this.transition_) {\n return 1;\n }\n\n let start = this.transitionStarts_[id];\n if (!start) {\n start = time;\n this.transitionStarts_[id] = start;\n } else if (start === -1) {\n return 1;\n }\n\n const delta = time - start + (1000 / 60); // avoid rendering at 0\n if (delta >= this.transition_) {\n return 1;\n }\n return easeIn(delta / this.transition_);\n};\n\n/**\n * Determine if a tile is in an alpha transition. A tile is considered in\n * transition if tile.getAlpha() has not yet been called or has been called\n * and returned 1.\n * @param {number} id An id for the renderer.\n * @return {boolean} The tile is in transition.\n */\nTile.prototype.inTransition = function(id) {\n if (!this.transition_) {\n return false;\n }\n return this.transitionStarts_[id] !== -1;\n};\n\n/**\n * Mark a transition as complete.\n * @param {number} id An id for the renderer.\n */\nTile.prototype.endTransition = function(id) {\n if (this.transition_) {\n this.transitionStarts_[id] = -1;\n }\n};\nexport default Tile;\n","/**\n * @module ol/ImageTile\n */\nimport {inherits} from './util.js';\nimport Tile from './Tile.js';\nimport TileState from './TileState.js';\nimport {createCanvasContext2D} from './dom.js';\nimport {listenOnce, unlistenByKey} from './events.js';\nimport EventType from './events/EventType.js';\n\n/**\n * @typedef {function(new: module:ol/ImageTile, module:ol/tilecoord~TileCoord,\n * module:ol/TileState, string, ?string, module:ol/Tile~LoadFunction)} TileClass\n * @api\n */\n\n/**\n * @constructor\n * @extends {module:ol/Tile}\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {module:ol/TileState} state State.\n * @param {string} src Image source URI.\n * @param {?string} crossOrigin Cross origin.\n * @param {module:ol/Tile~LoadFunction} tileLoadFunction Tile load function.\n * @param {module:ol/Tile~Options=} opt_options Tile options.\n */\nconst ImageTile = function(tileCoord, state, src, crossOrigin, tileLoadFunction, opt_options) {\n\n Tile.call(this, tileCoord, state, opt_options);\n\n /**\n * @private\n * @type {?string}\n */\n this.crossOrigin_ = crossOrigin;\n\n /**\n * Image URI\n *\n * @private\n * @type {string}\n */\n this.src_ = src;\n\n /**\n * @private\n * @type {Image|HTMLCanvasElement}\n */\n this.image_ = new Image();\n if (crossOrigin !== null) {\n this.image_.crossOrigin = crossOrigin;\n }\n\n /**\n * @private\n * @type {Array.<module:ol/events~EventsKey>}\n */\n this.imageListenerKeys_ = null;\n\n /**\n * @private\n * @type {module:ol/Tile~LoadFunction}\n */\n this.tileLoadFunction_ = tileLoadFunction;\n\n};\n\ninherits(ImageTile, Tile);\n\n\n/**\n * @inheritDoc\n */\nImageTile.prototype.disposeInternal = function() {\n if (this.state == TileState.LOADING) {\n this.unlistenImage_();\n this.image_ = getBlankImage();\n }\n if (this.interimTile) {\n this.interimTile.dispose();\n }\n this.state = TileState.ABORT;\n this.changed();\n Tile.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * Get the HTML image element for this tile (may be a Canvas, Image, or Video).\n * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.\n * @api\n */\nImageTile.prototype.getImage = function() {\n return this.image_;\n};\n\n\n/**\n * @inheritDoc\n */\nImageTile.prototype.getKey = function() {\n return this.src_;\n};\n\n\n/**\n * Tracks loading or read errors.\n *\n * @private\n */\nImageTile.prototype.handleImageError_ = function() {\n this.state = TileState.ERROR;\n this.unlistenImage_();\n this.image_ = getBlankImage();\n this.changed();\n};\n\n\n/**\n * Tracks successful image load.\n *\n * @private\n */\nImageTile.prototype.handleImageLoad_ = function() {\n if (this.image_.naturalWidth && this.image_.naturalHeight) {\n this.state = TileState.LOADED;\n } else {\n this.state = TileState.EMPTY;\n }\n this.unlistenImage_();\n this.changed();\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nImageTile.prototype.load = function() {\n if (this.state == TileState.ERROR) {\n this.state = TileState.IDLE;\n this.image_ = new Image();\n if (this.crossOrigin_ !== null) {\n this.image_.crossOrigin = this.crossOrigin_;\n }\n }\n if (this.state == TileState.IDLE) {\n this.state = TileState.LOADING;\n this.changed();\n this.imageListenerKeys_ = [\n listenOnce(this.image_, EventType.ERROR,\n this.handleImageError_, this),\n listenOnce(this.image_, EventType.LOAD,\n this.handleImageLoad_, this)\n ];\n this.tileLoadFunction_(this, this.src_);\n }\n};\n\n\n/**\n * Discards event handlers which listen for load completion or errors.\n *\n * @private\n */\nImageTile.prototype.unlistenImage_ = function() {\n this.imageListenerKeys_.forEach(unlistenByKey);\n this.imageListenerKeys_ = null;\n};\n\n\n/**\n * Get a 1-pixel blank image.\n * @return {HTMLCanvasElement} Blank image.\n */\nfunction getBlankImage() {\n const ctx = createCanvasContext2D(1, 1);\n ctx.fillStyle = 'rgba(0,0,0,0)';\n ctx.fillRect(0, 0, 1, 1);\n return ctx.canvas;\n}\n\nexport default ImageTile;\n","/**\n * @module ol/Kinetic\n */\n\n/**\n * @classdesc\n * Implementation of inertial deceleration for map movement.\n *\n * @constructor\n * @param {number} decay Rate of decay (must be negative).\n * @param {number} minVelocity Minimum velocity (pixels/millisecond).\n * @param {number} delay Delay to consider to calculate the kinetic\n * initial values (milliseconds).\n * @struct\n * @api\n */\nconst Kinetic = function(decay, minVelocity, delay) {\n\n /**\n * @private\n * @type {number}\n */\n this.decay_ = decay;\n\n /**\n * @private\n * @type {number}\n */\n this.minVelocity_ = minVelocity;\n\n /**\n * @private\n * @type {number}\n */\n this.delay_ = delay;\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.points_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.angle_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.initialVelocity_ = 0;\n};\n\n\n/**\n * FIXME empty description for jsdoc\n */\nKinetic.prototype.begin = function() {\n this.points_.length = 0;\n this.angle_ = 0;\n this.initialVelocity_ = 0;\n};\n\n\n/**\n * @param {number} x X.\n * @param {number} y Y.\n */\nKinetic.prototype.update = function(x, y) {\n this.points_.push(x, y, Date.now());\n};\n\n\n/**\n * @return {boolean} Whether we should do kinetic animation.\n */\nKinetic.prototype.end = function() {\n if (this.points_.length < 6) {\n // at least 2 points are required (i.e. there must be at least 6 elements\n // in the array)\n return false;\n }\n const delay = Date.now() - this.delay_;\n const lastIndex = this.points_.length - 3;\n if (this.points_[lastIndex + 2] < delay) {\n // the last tracked point is too old, which means that the user stopped\n // panning before releasing the map\n return false;\n }\n\n // get the first point which still falls into the delay time\n let firstIndex = lastIndex - 3;\n while (firstIndex > 0 && this.points_[firstIndex + 2] > delay) {\n firstIndex -= 3;\n }\n\n const duration = this.points_[lastIndex + 2] - this.points_[firstIndex + 2];\n // we don't want a duration of 0 (divide by zero)\n // we also make sure the user panned for a duration of at least one frame\n // (1/60s) to compute sane displacement values\n if (duration < 1000 / 60) {\n return false;\n }\n\n const dx = this.points_[lastIndex] - this.points_[firstIndex];\n const dy = this.points_[lastIndex + 1] - this.points_[firstIndex + 1];\n this.angle_ = Math.atan2(dy, dx);\n this.initialVelocity_ = Math.sqrt(dx * dx + dy * dy) / duration;\n return this.initialVelocity_ > this.minVelocity_;\n};\n\n\n/**\n * @return {number} Total distance travelled (pixels).\n */\nKinetic.prototype.getDistance = function() {\n return (this.minVelocity_ - this.initialVelocity_) / this.decay_;\n};\n\n\n/**\n * @return {number} Angle of the kinetic panning animation (radians).\n */\nKinetic.prototype.getAngle = function() {\n return this.angle_;\n};\nexport default Kinetic;\n","/**\n * @module ol/MapEvent\n */\nimport {inherits} from './util.js';\nimport Event from './events/Event.js';\n\n/**\n * @classdesc\n * Events emitted as map events are instances of this type.\n * See {@link module:ol/Map~Map} for which events trigger a map event.\n *\n * @constructor\n * @extends {module:ol/events/Event}\n * @param {string} type Event type.\n * @param {module:ol/PluggableMap} map Map.\n * @param {?module:ol/PluggableMap~FrameState=} opt_frameState Frame state.\n */\nconst MapEvent = function(type, map, opt_frameState) {\n\n Event.call(this, type);\n\n /**\n * The map where the event occurred.\n * @type {module:ol/PluggableMap}\n * @api\n */\n this.map = map;\n\n /**\n * The frame state at the time of the event.\n * @type {?module:ol/PluggableMap~FrameState}\n * @api\n */\n this.frameState = opt_frameState !== undefined ? opt_frameState : null;\n\n};\n\ninherits(MapEvent, Event);\nexport default MapEvent;\n","/**\n * @module ol/MapBrowserEvent\n */\nimport {inherits} from './util.js';\nimport MapEvent from './MapEvent.js';\n\n/**\n * @classdesc\n * Events emitted as map browser events are instances of this type.\n * See {@link module:ol/Map~Map} for which events trigger a map browser event.\n *\n * @constructor\n * @extends {module:ol/MapEvent}\n * @param {string} type Event type.\n * @param {module:ol/PluggableMap} map Map.\n * @param {Event} browserEvent Browser event.\n * @param {boolean=} opt_dragging Is the map currently being dragged?\n * @param {?module:ol/PluggableMap~FrameState=} opt_frameState Frame state.\n */\nconst MapBrowserEvent = function(type, map, browserEvent, opt_dragging, opt_frameState) {\n\n MapEvent.call(this, type, map, opt_frameState);\n\n /**\n * The original browser event.\n * @const\n * @type {Event}\n * @api\n */\n this.originalEvent = browserEvent;\n\n /**\n * The map pixel relative to the viewport corresponding to the original browser event.\n * @type {module:ol~Pixel}\n * @api\n */\n this.pixel = map.getEventPixel(browserEvent);\n\n /**\n * The coordinate in view projection corresponding to the original browser event.\n * @type {module:ol/coordinate~Coordinate}\n * @api\n */\n this.coordinate = map.getCoordinateFromPixel(this.pixel);\n\n /**\n * Indicates if the map is currently being dragged. Only set for\n * `POINTERDRAG` and `POINTERMOVE` events. Default is `false`.\n *\n * @type {boolean}\n * @api\n */\n this.dragging = opt_dragging !== undefined ? opt_dragging : false;\n\n};\n\ninherits(MapBrowserEvent, MapEvent);\n\n\n/**\n * Prevents the default browser action.\n * @see https://developer.mozilla.org/en-US/docs/Web/API/event.preventDefault\n * @override\n * @api\n */\nMapBrowserEvent.prototype.preventDefault = function() {\n MapEvent.prototype.preventDefault.call(this);\n this.originalEvent.preventDefault();\n};\n\n\n/**\n * Prevents further propagation of the current event.\n * @see https://developer.mozilla.org/en-US/docs/Web/API/event.stopPropagation\n * @override\n * @api\n */\nMapBrowserEvent.prototype.stopPropagation = function() {\n MapEvent.prototype.stopPropagation.call(this);\n this.originalEvent.stopPropagation();\n};\nexport default MapBrowserEvent;\n","/**\n * @module ol/MapBrowserEventType\n */\nimport EventType from './events/EventType.js';\n\n/**\n * Constants for event names.\n * @enum {string}\n */\nexport default {\n\n /**\n * A true single click with no dragging and no double click. Note that this\n * event is delayed by 250 ms to ensure that it is not a double click.\n * @event module:ol/MapBrowserEvent~MapBrowserEvent#singleclick\n * @api\n */\n SINGLECLICK: 'singleclick',\n\n /**\n * A click with no dragging. A double click will fire two of this.\n * @event module:ol/MapBrowserEvent~MapBrowserEvent#click\n * @api\n */\n CLICK: EventType.CLICK,\n\n /**\n * A true double click, with no dragging.\n * @event module:ol/MapBrowserEvent~MapBrowserEvent#dblclick\n * @api\n */\n DBLCLICK: EventType.DBLCLICK,\n\n /**\n * Triggered when a pointer is dragged.\n * @event module:ol/MapBrowserEvent~MapBrowserEvent#pointerdrag\n * @api\n */\n POINTERDRAG: 'pointerdrag',\n\n /**\n * Triggered when a pointer is moved. Note that on touch devices this is\n * triggered when the map is panned, so is not the same as mousemove.\n * @event module:ol/MapBrowserEvent~MapBrowserEvent#pointermove\n * @api\n */\n POINTERMOVE: 'pointermove',\n\n POINTERDOWN: 'pointerdown',\n POINTERUP: 'pointerup',\n POINTEROVER: 'pointerover',\n POINTEROUT: 'pointerout',\n POINTERENTER: 'pointerenter',\n POINTERLEAVE: 'pointerleave',\n POINTERCANCEL: 'pointercancel'\n};\n","/**\n * @module ol/MapBrowserPointerEvent\n */\nimport {inherits} from './util.js';\nimport MapBrowserEvent from './MapBrowserEvent.js';\n\n/**\n * @constructor\n * @extends {module:ol/MapBrowserEvent}\n * @param {string} type Event type.\n * @param {module:ol/PluggableMap} map Map.\n * @param {module:ol/pointer/PointerEvent} pointerEvent Pointer\n * event.\n * @param {boolean=} opt_dragging Is the map currently being dragged?\n * @param {?module:ol/PluggableMap~FrameState=} opt_frameState Frame state.\n */\nconst MapBrowserPointerEvent = function(type, map, pointerEvent, opt_dragging,\n opt_frameState) {\n\n MapBrowserEvent.call(this, type, map, pointerEvent.originalEvent, opt_dragging,\n opt_frameState);\n\n /**\n * @const\n * @type {module:ol/pointer/PointerEvent}\n */\n this.pointerEvent = pointerEvent;\n\n};\n\ninherits(MapBrowserPointerEvent, MapBrowserEvent);\nexport default MapBrowserPointerEvent;\n","/**\n * @module ol/pointer/EventType\n */\n\n/**\n * Constants for event names.\n * @enum {string}\n */\nexport default {\n POINTERMOVE: 'pointermove',\n POINTERDOWN: 'pointerdown',\n POINTERUP: 'pointerup',\n POINTEROVER: 'pointerover',\n POINTEROUT: 'pointerout',\n POINTERENTER: 'pointerenter',\n POINTERLEAVE: 'pointerleave',\n POINTERCANCEL: 'pointercancel'\n};\n","/**\n * @module ol/pointer/EventSource\n */\n/**\n * @param {module:ol/pointer/PointerEventHandler} dispatcher Event handler.\n * @param {!Object.<string, function(Event)>} mapping Event mapping.\n * @constructor\n */\nconst EventSource = function(dispatcher, mapping) {\n /**\n * @type {module:ol/pointer/PointerEventHandler}\n */\n this.dispatcher = dispatcher;\n\n /**\n * @private\n * @const\n * @type {!Object.<string, function(Event)>}\n */\n this.mapping_ = mapping;\n};\n\n\n/**\n * List of events supported by this source.\n * @return {Array.<string>} Event names\n */\nEventSource.prototype.getEvents = function() {\n return Object.keys(this.mapping_);\n};\n\n\n/**\n * Returns the handler that should handle a given event type.\n * @param {string} eventType The event type.\n * @return {function(Event)} Handler\n */\nEventSource.prototype.getHandlerForEvent = function(eventType) {\n return this.mapping_[eventType];\n};\nexport default EventSource;\n","/**\n * @module ol/pointer/MouseSource\n */\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport {inherits} from '../util.js';\nimport EventSource from '../pointer/EventSource.js';\n\n/**\n * @param {module:ol/pointer/PointerEventHandler} dispatcher Event handler.\n * @constructor\n * @extends {module:ol/pointer/EventSource}\n */\nconst MouseSource = function(dispatcher) {\n const mapping = {\n 'mousedown': this.mousedown,\n 'mousemove': this.mousemove,\n 'mouseup': this.mouseup,\n 'mouseover': this.mouseover,\n 'mouseout': this.mouseout\n };\n EventSource.call(this, dispatcher, mapping);\n\n /**\n * @const\n * @type {!Object.<string, Event|Object>}\n */\n this.pointerMap = dispatcher.pointerMap;\n\n /**\n * @const\n * @type {Array.<module:ol~Pixel>}\n */\n this.lastTouches = [];\n};\n\ninherits(MouseSource, EventSource);\n\n\n/**\n * @type {number}\n */\nexport const POINTER_ID = 1;\n\n\n/**\n * @type {string}\n */\nexport const POINTER_TYPE = 'mouse';\n\n\n/**\n * Radius around touchend that swallows mouse events.\n *\n * @type {number}\n */\nconst DEDUP_DIST = 25;\n\n\n/**\n * Detect if a mouse event was simulated from a touch by\n * checking if previously there was a touch event at the\n * same position.\n *\n * FIXME - Known problem with the native Android browser on\n * Samsung GT-I9100 (Android 4.1.2):\n * In case the page is scrolled, this function does not work\n * correctly when a canvas is used (WebGL or canvas renderer).\n * Mouse listeners on canvas elements (for this browser), create\n * two mouse events: One 'good' and one 'bad' one (on other browsers or\n * when a div is used, there is only one event). For the 'bad' one,\n * clientX/clientY and also pageX/pageY are wrong when the page\n * is scrolled. Because of that, this function can not detect if\n * the events were simulated from a touch event. As result, a\n * pointer event at a wrong position is dispatched, which confuses\n * the map interactions.\n * It is unclear, how one can get the correct position for the event\n * or detect that the positions are invalid.\n *\n * @private\n * @param {Event} inEvent The in event.\n * @return {boolean} True, if the event was generated by a touch.\n */\nMouseSource.prototype.isEventSimulatedFromTouch_ = function(inEvent) {\n const lts = this.lastTouches;\n const x = inEvent.clientX;\n const y = inEvent.clientY;\n for (let i = 0, l = lts.length, t; i < l && (t = lts[i]); i++) {\n // simulated mouse events will be swallowed near a primary touchend\n const dx = Math.abs(x - t[0]);\n const dy = Math.abs(y - t[1]);\n if (dx <= DEDUP_DIST && dy <= DEDUP_DIST) {\n return true;\n }\n }\n return false;\n};\n\n\n/**\n * Creates a copy of the original event that will be used\n * for the fake pointer event.\n *\n * @param {Event} inEvent The in event.\n * @param {module:ol/pointer/PointerEventHandler} dispatcher Event handler.\n * @return {Object} The copied event.\n */\nfunction prepareEvent(inEvent, dispatcher) {\n const e = dispatcher.cloneEvent(inEvent, inEvent);\n\n // forward mouse preventDefault\n const pd = e.preventDefault;\n e.preventDefault = function() {\n inEvent.preventDefault();\n pd();\n };\n\n e.pointerId = POINTER_ID;\n e.isPrimary = true;\n e.pointerType = POINTER_TYPE;\n\n return e;\n}\n\n\n/**\n * Handler for `mousedown`.\n *\n * @param {Event} inEvent The in event.\n */\nMouseSource.prototype.mousedown = function(inEvent) {\n if (!this.isEventSimulatedFromTouch_(inEvent)) {\n // TODO(dfreedman) workaround for some elements not sending mouseup\n // http://crbug/149091\n if (POINTER_ID.toString() in this.pointerMap) {\n this.cancel(inEvent);\n }\n const e = prepareEvent(inEvent, this.dispatcher);\n this.pointerMap[POINTER_ID.toString()] = inEvent;\n this.dispatcher.down(e, inEvent);\n }\n};\n\n\n/**\n * Handler for `mousemove`.\n *\n * @param {Event} inEvent The in event.\n */\nMouseSource.prototype.mousemove = function(inEvent) {\n if (!this.isEventSimulatedFromTouch_(inEvent)) {\n const e = prepareEvent(inEvent, this.dispatcher);\n this.dispatcher.move(e, inEvent);\n }\n};\n\n\n/**\n * Handler for `mouseup`.\n *\n * @param {Event} inEvent The in event.\n */\nMouseSource.prototype.mouseup = function(inEvent) {\n if (!this.isEventSimulatedFromTouch_(inEvent)) {\n const p = this.pointerMap[POINTER_ID.toString()];\n\n if (p && p.button === inEvent.button) {\n const e = prepareEvent(inEvent, this.dispatcher);\n this.dispatcher.up(e, inEvent);\n this.cleanupMouse();\n }\n }\n};\n\n\n/**\n * Handler for `mouseover`.\n *\n * @param {Event} inEvent The in event.\n */\nMouseSource.prototype.mouseover = function(inEvent) {\n if (!this.isEventSimulatedFromTouch_(inEvent)) {\n const e = prepareEvent(inEvent, this.dispatcher);\n this.dispatcher.enterOver(e, inEvent);\n }\n};\n\n\n/**\n * Handler for `mouseout`.\n *\n * @param {Event} inEvent The in event.\n */\nMouseSource.prototype.mouseout = function(inEvent) {\n if (!this.isEventSimulatedFromTouch_(inEvent)) {\n const e = prepareEvent(inEvent, this.dispatcher);\n this.dispatcher.leaveOut(e, inEvent);\n }\n};\n\n\n/**\n * Dispatches a `pointercancel` event.\n *\n * @param {Event} inEvent The in event.\n */\nMouseSource.prototype.cancel = function(inEvent) {\n const e = prepareEvent(inEvent, this.dispatcher);\n this.dispatcher.cancel(e, inEvent);\n this.cleanupMouse();\n};\n\n\n/**\n * Remove the mouse from the list of active pointers.\n */\nMouseSource.prototype.cleanupMouse = function() {\n delete this.pointerMap[POINTER_ID.toString()];\n};\nexport default MouseSource;\n","/**\n * @module ol/pointer/MsSource\n */\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport {inherits} from '../util.js';\nimport EventSource from '../pointer/EventSource.js';\n\n/**\n * @param {module:ol/pointer/PointerEventHandler} dispatcher Event handler.\n * @constructor\n * @extends {module:ol/pointer/EventSource}\n */\nconst MsSource = function(dispatcher) {\n const mapping = {\n 'MSPointerDown': this.msPointerDown,\n 'MSPointerMove': this.msPointerMove,\n 'MSPointerUp': this.msPointerUp,\n 'MSPointerOut': this.msPointerOut,\n 'MSPointerOver': this.msPointerOver,\n 'MSPointerCancel': this.msPointerCancel,\n 'MSGotPointerCapture': this.msGotPointerCapture,\n 'MSLostPointerCapture': this.msLostPointerCapture\n };\n EventSource.call(this, dispatcher, mapping);\n\n /**\n * @const\n * @type {!Object.<string, MSPointerEvent|Object>}\n */\n this.pointerMap = dispatcher.pointerMap;\n};\n\ninherits(MsSource, EventSource);\n\n/**\n * @const\n * @type {Array.<string>}\n */\nconst POINTER_TYPES = [\n '',\n 'unavailable',\n 'touch',\n 'pen',\n 'mouse'\n];\n\n\n/**\n * Creates a copy of the original event that will be used\n * for the fake pointer event.\n *\n * @private\n * @param {MSPointerEvent} inEvent The in event.\n * @return {Object} The copied event.\n */\nMsSource.prototype.prepareEvent_ = function(inEvent) {\n let e = inEvent;\n if (typeof inEvent.pointerType === 'number') {\n e = this.dispatcher.cloneEvent(inEvent, inEvent);\n e.pointerType = POINTER_TYPES[inEvent.pointerType];\n }\n\n return e;\n};\n\n\n/**\n * Remove this pointer from the list of active pointers.\n * @param {number} pointerId Pointer identifier.\n */\nMsSource.prototype.cleanup = function(pointerId) {\n delete this.pointerMap[pointerId.toString()];\n};\n\n\n/**\n * Handler for `msPointerDown`.\n *\n * @param {MSPointerEvent} inEvent The in event.\n */\nMsSource.prototype.msPointerDown = function(inEvent) {\n this.pointerMap[inEvent.pointerId.toString()] = inEvent;\n const e = this.prepareEvent_(inEvent);\n this.dispatcher.down(e, inEvent);\n};\n\n\n/**\n * Handler for `msPointerMove`.\n *\n * @param {MSPointerEvent} inEvent The in event.\n */\nMsSource.prototype.msPointerMove = function(inEvent) {\n const e = this.prepareEvent_(inEvent);\n this.dispatcher.move(e, inEvent);\n};\n\n\n/**\n * Handler for `msPointerUp`.\n *\n * @param {MSPointerEvent} inEvent The in event.\n */\nMsSource.prototype.msPointerUp = function(inEvent) {\n const e = this.prepareEvent_(inEvent);\n this.dispatcher.up(e, inEvent);\n this.cleanup(inEvent.pointerId);\n};\n\n\n/**\n * Handler for `msPointerOut`.\n *\n * @param {MSPointerEvent} inEvent The in event.\n */\nMsSource.prototype.msPointerOut = function(inEvent) {\n const e = this.prepareEvent_(inEvent);\n this.dispatcher.leaveOut(e, inEvent);\n};\n\n\n/**\n * Handler for `msPointerOver`.\n *\n * @param {MSPointerEvent} inEvent The in event.\n */\nMsSource.prototype.msPointerOver = function(inEvent) {\n const e = this.prepareEvent_(inEvent);\n this.dispatcher.enterOver(e, inEvent);\n};\n\n\n/**\n * Handler for `msPointerCancel`.\n *\n * @param {MSPointerEvent} inEvent The in event.\n */\nMsSource.prototype.msPointerCancel = function(inEvent) {\n const e = this.prepareEvent_(inEvent);\n this.dispatcher.cancel(e, inEvent);\n this.cleanup(inEvent.pointerId);\n};\n\n\n/**\n * Handler for `msLostPointerCapture`.\n *\n * @param {MSPointerEvent} inEvent The in event.\n */\nMsSource.prototype.msLostPointerCapture = function(inEvent) {\n const e = this.dispatcher.makeEvent('lostpointercapture', inEvent, inEvent);\n this.dispatcher.dispatchEvent(e);\n};\n\n\n/**\n * Handler for `msGotPointerCapture`.\n *\n * @param {MSPointerEvent} inEvent The in event.\n */\nMsSource.prototype.msGotPointerCapture = function(inEvent) {\n const e = this.dispatcher.makeEvent('gotpointercapture', inEvent, inEvent);\n this.dispatcher.dispatchEvent(e);\n};\nexport default MsSource;\n","/**\n * @module ol/pointer/NativeSource\n */\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport {inherits} from '../util.js';\nimport EventSource from '../pointer/EventSource.js';\n\n/**\n * @param {module:ol/pointer/PointerEventHandler} dispatcher Event handler.\n * @constructor\n * @extends {module:ol/pointer/EventSource}\n */\nconst NativeSource = function(dispatcher) {\n const mapping = {\n 'pointerdown': this.pointerDown,\n 'pointermove': this.pointerMove,\n 'pointerup': this.pointerUp,\n 'pointerout': this.pointerOut,\n 'pointerover': this.pointerOver,\n 'pointercancel': this.pointerCancel,\n 'gotpointercapture': this.gotPointerCapture,\n 'lostpointercapture': this.lostPointerCapture\n };\n EventSource.call(this, dispatcher, mapping);\n};\n\ninherits(NativeSource, EventSource);\n\n\n/**\n * Handler for `pointerdown`.\n *\n * @param {Event} inEvent The in event.\n */\nNativeSource.prototype.pointerDown = function(inEvent) {\n this.dispatcher.fireNativeEvent(inEvent);\n};\n\n\n/**\n * Handler for `pointermove`.\n *\n * @param {Event} inEvent The in event.\n */\nNativeSource.prototype.pointerMove = function(inEvent) {\n this.dispatcher.fireNativeEvent(inEvent);\n};\n\n\n/**\n * Handler for `pointerup`.\n *\n * @param {Event} inEvent The in event.\n */\nNativeSource.prototype.pointerUp = function(inEvent) {\n this.dispatcher.fireNativeEvent(inEvent);\n};\n\n\n/**\n * Handler for `pointerout`.\n *\n * @param {Event} inEvent The in event.\n */\nNativeSource.prototype.pointerOut = function(inEvent) {\n this.dispatcher.fireNativeEvent(inEvent);\n};\n\n\n/**\n * Handler for `pointerover`.\n *\n * @param {Event} inEvent The in event.\n */\nNativeSource.prototype.pointerOver = function(inEvent) {\n this.dispatcher.fireNativeEvent(inEvent);\n};\n\n\n/**\n * Handler for `pointercancel`.\n *\n * @param {Event} inEvent The in event.\n */\nNativeSource.prototype.pointerCancel = function(inEvent) {\n this.dispatcher.fireNativeEvent(inEvent);\n};\n\n\n/**\n * Handler for `lostpointercapture`.\n *\n * @param {Event} inEvent The in event.\n */\nNativeSource.prototype.lostPointerCapture = function(inEvent) {\n this.dispatcher.fireNativeEvent(inEvent);\n};\n\n\n/**\n * Handler for `gotpointercapture`.\n *\n * @param {Event} inEvent The in event.\n */\nNativeSource.prototype.gotPointerCapture = function(inEvent) {\n this.dispatcher.fireNativeEvent(inEvent);\n};\nexport default NativeSource;\n","/**\n * @module ol/pointer/PointerEvent\n */\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport {inherits} from '../util.js';\nimport Event from '../events/Event.js';\n\n/**\n * A class for pointer events.\n *\n * This class is used as an abstraction for mouse events,\n * touch events and even native pointer events.\n *\n * @constructor\n * @extends {module:ol/events/Event}\n * @param {string} type The type of the event to create.\n * @param {Event} originalEvent The event.\n * @param {Object.<string, ?>=} opt_eventDict An optional dictionary of\n * initial event properties.\n */\nconst PointerEvent = function(type, originalEvent, opt_eventDict) {\n Event.call(this, type);\n\n /**\n * @const\n * @type {Event}\n */\n this.originalEvent = originalEvent;\n\n const eventDict = opt_eventDict ? opt_eventDict : {};\n\n /**\n * @type {number}\n */\n this.buttons = this.getButtons_(eventDict);\n\n /**\n * @type {number}\n */\n this.pressure = this.getPressure_(eventDict, this.buttons);\n\n // MouseEvent related properties\n\n /**\n * @type {boolean}\n */\n this.bubbles = 'bubbles' in eventDict ? eventDict['bubbles'] : false;\n\n /**\n * @type {boolean}\n */\n this.cancelable = 'cancelable' in eventDict ? eventDict['cancelable'] : false;\n\n /**\n * @type {Object}\n */\n this.view = 'view' in eventDict ? eventDict['view'] : null;\n\n /**\n * @type {number}\n */\n this.detail = 'detail' in eventDict ? eventDict['detail'] : null;\n\n /**\n * @type {number}\n */\n this.screenX = 'screenX' in eventDict ? eventDict['screenX'] : 0;\n\n /**\n * @type {number}\n */\n this.screenY = 'screenY' in eventDict ? eventDict['screenY'] : 0;\n\n /**\n * @type {number}\n */\n this.clientX = 'clientX' in eventDict ? eventDict['clientX'] : 0;\n\n /**\n * @type {number}\n */\n this.clientY = 'clientY' in eventDict ? eventDict['clientY'] : 0;\n\n /**\n * @type {boolean}\n */\n this.ctrlKey = 'ctrlKey' in eventDict ? eventDict['ctrlKey'] : false;\n\n /**\n * @type {boolean}\n */\n this.altKey = 'altKey' in eventDict ? eventDict['altKey'] : false;\n\n /**\n * @type {boolean}\n */\n this.shiftKey = 'shiftKey' in eventDict ? eventDict['shiftKey'] : false;\n\n /**\n * @type {boolean}\n */\n this.metaKey = 'metaKey' in eventDict ? eventDict['metaKey'] : false;\n\n /**\n * @type {number}\n */\n this.button = 'button' in eventDict ? eventDict['button'] : 0;\n\n /**\n * @type {Node}\n */\n this.relatedTarget = 'relatedTarget' in eventDict ?\n eventDict['relatedTarget'] : null;\n\n // PointerEvent related properties\n\n /**\n * @const\n * @type {number}\n */\n this.pointerId = 'pointerId' in eventDict ? eventDict['pointerId'] : 0;\n\n /**\n * @type {number}\n */\n this.width = 'width' in eventDict ? eventDict['width'] : 0;\n\n /**\n * @type {number}\n */\n this.height = 'height' in eventDict ? eventDict['height'] : 0;\n\n /**\n * @type {number}\n */\n this.tiltX = 'tiltX' in eventDict ? eventDict['tiltX'] : 0;\n\n /**\n * @type {number}\n */\n this.tiltY = 'tiltY' in eventDict ? eventDict['tiltY'] : 0;\n\n /**\n * @type {string}\n */\n this.pointerType = 'pointerType' in eventDict ? eventDict['pointerType'] : '';\n\n /**\n * @type {number}\n */\n this.hwTimestamp = 'hwTimestamp' in eventDict ? eventDict['hwTimestamp'] : 0;\n\n /**\n * @type {boolean}\n */\n this.isPrimary = 'isPrimary' in eventDict ? eventDict['isPrimary'] : false;\n\n // keep the semantics of preventDefault\n if (originalEvent.preventDefault) {\n this.preventDefault = function() {\n originalEvent.preventDefault();\n };\n }\n};\n\ninherits(PointerEvent, Event);\n\n\n/**\n * Is the `buttons` property supported?\n * @type {boolean}\n */\nlet HAS_BUTTONS = false;\n\n\n/**\n * @private\n * @param {Object.<string, ?>} eventDict The event dictionary.\n * @return {number} Button indicator.\n */\nPointerEvent.prototype.getButtons_ = function(eventDict) {\n // According to the w3c spec,\n // http://www.w3.org/TR/DOM-Level-3-Events/#events-MouseEvent-button\n // MouseEvent.button == 0 can mean either no mouse button depressed, or the\n // left mouse button depressed.\n //\n // As of now, the only way to distinguish between the two states of\n // MouseEvent.button is by using the deprecated MouseEvent.which property, as\n // this maps mouse buttons to positive integers > 0, and uses 0 to mean that\n // no mouse button is held.\n //\n // MouseEvent.which is derived from MouseEvent.button at MouseEvent creation,\n // but initMouseEvent does not expose an argument with which to set\n // MouseEvent.which. Calling initMouseEvent with a buttonArg of 0 will set\n // MouseEvent.button == 0 and MouseEvent.which == 1, breaking the expectations\n // of app developers.\n //\n // The only way to propagate the correct state of MouseEvent.which and\n // MouseEvent.button to a new MouseEvent.button == 0 and MouseEvent.which == 0\n // is to call initMouseEvent with a buttonArg value of -1.\n //\n // This is fixed with DOM Level 4's use of buttons\n let buttons;\n if (eventDict.buttons || HAS_BUTTONS) {\n buttons = eventDict.buttons;\n } else {\n switch (eventDict.which) {\n case 1: buttons = 1; break;\n case 2: buttons = 4; break;\n case 3: buttons = 2; break;\n default: buttons = 0;\n }\n }\n return buttons;\n};\n\n\n/**\n * @private\n * @param {Object.<string, ?>} eventDict The event dictionary.\n * @param {number} buttons Button indicator.\n * @return {number} The pressure.\n */\nPointerEvent.prototype.getPressure_ = function(eventDict, buttons) {\n // Spec requires that pointers without pressure specified use 0.5 for down\n // state and 0 for up state.\n let pressure = 0;\n if (eventDict.pressure) {\n pressure = eventDict.pressure;\n } else {\n pressure = buttons ? 0.5 : 0;\n }\n return pressure;\n};\n\n\n/**\n * Checks if the `buttons` property is supported.\n */\n(function() {\n try {\n const ev = new MouseEvent('click', {buttons: 1});\n HAS_BUTTONS = ev.buttons === 1;\n } catch (e) {\n // pass\n }\n})();\nexport default PointerEvent;\n","/**\n * @module ol/pointer/TouchSource\n */\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport {inherits} from '../util.js';\nimport {remove} from '../array.js';\nimport EventSource from '../pointer/EventSource.js';\nimport {POINTER_ID} from '../pointer/MouseSource.js';\n\n\n/**\n * @constructor\n * @param {module:ol/pointer/PointerEventHandler} dispatcher The event handler.\n * @param {module:ol/pointer/MouseSource} mouseSource Mouse source.\n * @extends {module:ol/pointer/EventSource}\n */\nconst TouchSource = function(dispatcher, mouseSource) {\n const mapping = {\n 'touchstart': this.touchstart,\n 'touchmove': this.touchmove,\n 'touchend': this.touchend,\n 'touchcancel': this.touchcancel\n };\n EventSource.call(this, dispatcher, mapping);\n\n /**\n * @const\n * @type {!Object.<string, Event|Object>}\n */\n this.pointerMap = dispatcher.pointerMap;\n\n /**\n * @const\n * @type {module:ol/pointer/MouseSource}\n */\n this.mouseSource = mouseSource;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.firstTouchId_ = undefined;\n\n /**\n * @private\n * @type {number}\n */\n this.clickCount_ = 0;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.resetId_ = undefined;\n\n /**\n * Mouse event timeout: This should be long enough to\n * ignore compat mouse events made by touch.\n * @private\n * @type {number}\n */\n this.dedupTimeout_ = 2500;\n};\n\ninherits(TouchSource, EventSource);\n\n\n/**\n * @type {number}\n */\nconst CLICK_COUNT_TIMEOUT = 200;\n\n\n/**\n * @type {string}\n */\nconst POINTER_TYPE = 'touch';\n\n/**\n * @private\n * @param {Touch} inTouch The in touch.\n * @return {boolean} True, if this is the primary touch.\n */\nTouchSource.prototype.isPrimaryTouch_ = function(inTouch) {\n return this.firstTouchId_ === inTouch.identifier;\n};\n\n\n/**\n * Set primary touch if there are no pointers, or the only pointer is the mouse.\n * @param {Touch} inTouch The in touch.\n * @private\n */\nTouchSource.prototype.setPrimaryTouch_ = function(inTouch) {\n const count = Object.keys(this.pointerMap).length;\n if (count === 0 || (count === 1 && POINTER_ID.toString() in this.pointerMap)) {\n this.firstTouchId_ = inTouch.identifier;\n this.cancelResetClickCount_();\n }\n};\n\n\n/**\n * @private\n * @param {Object} inPointer The in pointer object.\n */\nTouchSource.prototype.removePrimaryPointer_ = function(inPointer) {\n if (inPointer.isPrimary) {\n this.firstTouchId_ = undefined;\n this.resetClickCount_();\n }\n};\n\n\n/**\n * @private\n */\nTouchSource.prototype.resetClickCount_ = function() {\n this.resetId_ = setTimeout(\n this.resetClickCountHandler_.bind(this),\n CLICK_COUNT_TIMEOUT);\n};\n\n\n/**\n * @private\n */\nTouchSource.prototype.resetClickCountHandler_ = function() {\n this.clickCount_ = 0;\n this.resetId_ = undefined;\n};\n\n\n/**\n * @private\n */\nTouchSource.prototype.cancelResetClickCount_ = function() {\n if (this.resetId_ !== undefined) {\n clearTimeout(this.resetId_);\n }\n};\n\n\n/**\n * @private\n * @param {Event} browserEvent Browser event\n * @param {Touch} inTouch Touch event\n * @return {Object} A pointer object.\n */\nTouchSource.prototype.touchToPointer_ = function(browserEvent, inTouch) {\n const e = this.dispatcher.cloneEvent(browserEvent, inTouch);\n // Spec specifies that pointerId 1 is reserved for Mouse.\n // Touch identifiers can start at 0.\n // Add 2 to the touch identifier for compatibility.\n e.pointerId = inTouch.identifier + 2;\n // TODO: check if this is necessary?\n //e.target = findTarget(e);\n e.bubbles = true;\n e.cancelable = true;\n e.detail = this.clickCount_;\n e.button = 0;\n e.buttons = 1;\n e.width = inTouch.webkitRadiusX || inTouch.radiusX || 0;\n e.height = inTouch.webkitRadiusY || inTouch.radiusY || 0;\n e.pressure = inTouch.webkitForce || inTouch.force || 0.5;\n e.isPrimary = this.isPrimaryTouch_(inTouch);\n e.pointerType = POINTER_TYPE;\n\n // make sure that the properties that are different for\n // each `Touch` object are not copied from the BrowserEvent object\n e.clientX = inTouch.clientX;\n e.clientY = inTouch.clientY;\n e.screenX = inTouch.screenX;\n e.screenY = inTouch.screenY;\n\n return e;\n};\n\n\n/**\n * @private\n * @param {Event} inEvent Touch event\n * @param {function(Event, Object)} inFunction In function.\n */\nTouchSource.prototype.processTouches_ = function(inEvent, inFunction) {\n const touches = Array.prototype.slice.call(inEvent.changedTouches);\n const count = touches.length;\n function preventDefault() {\n inEvent.preventDefault();\n }\n for (let i = 0; i < count; ++i) {\n const pointer = this.touchToPointer_(inEvent, touches[i]);\n // forward touch preventDefaults\n pointer.preventDefault = preventDefault;\n inFunction.call(this, inEvent, pointer);\n }\n};\n\n\n/**\n * @private\n * @param {TouchList} touchList The touch list.\n * @param {number} searchId Search identifier.\n * @return {boolean} True, if the `Touch` with the given id is in the list.\n */\nTouchSource.prototype.findTouch_ = function(touchList, searchId) {\n const l = touchList.length;\n for (let i = 0; i < l; i++) {\n const touch = touchList[i];\n if (touch.identifier === searchId) {\n return true;\n }\n }\n return false;\n};\n\n\n/**\n * In some instances, a touchstart can happen without a touchend. This\n * leaves the pointermap in a broken state.\n * Therefore, on every touchstart, we remove the touches that did not fire a\n * touchend event.\n * To keep state globally consistent, we fire a pointercancel for\n * this \"abandoned\" touch\n *\n * @private\n * @param {Event} inEvent The in event.\n */\nTouchSource.prototype.vacuumTouches_ = function(inEvent) {\n const touchList = inEvent.touches;\n // pointerMap.getCount() should be < touchList.length here,\n // as the touchstart has not been processed yet.\n const keys = Object.keys(this.pointerMap);\n const count = keys.length;\n if (count >= touchList.length) {\n const d = [];\n for (let i = 0; i < count; ++i) {\n const key = keys[i];\n const value = this.pointerMap[key];\n // Never remove pointerId == 1, which is mouse.\n // Touch identifiers are 2 smaller than their pointerId, which is the\n // index in pointermap.\n if (key != POINTER_ID && !this.findTouch_(touchList, key - 2)) {\n d.push(value.out);\n }\n }\n for (let i = 0; i < d.length; ++i) {\n this.cancelOut_(inEvent, d[i]);\n }\n }\n};\n\n\n/**\n * Handler for `touchstart`, triggers `pointerover`,\n * `pointerenter` and `pointerdown` events.\n *\n * @param {Event} inEvent The in event.\n */\nTouchSource.prototype.touchstart = function(inEvent) {\n this.vacuumTouches_(inEvent);\n this.setPrimaryTouch_(inEvent.changedTouches[0]);\n this.dedupSynthMouse_(inEvent);\n this.clickCount_++;\n this.processTouches_(inEvent, this.overDown_);\n};\n\n\n/**\n * @private\n * @param {Event} browserEvent The event.\n * @param {Object} inPointer The in pointer object.\n */\nTouchSource.prototype.overDown_ = function(browserEvent, inPointer) {\n this.pointerMap[inPointer.pointerId] = {\n target: inPointer.target,\n out: inPointer,\n outTarget: inPointer.target\n };\n this.dispatcher.over(inPointer, browserEvent);\n this.dispatcher.enter(inPointer, browserEvent);\n this.dispatcher.down(inPointer, browserEvent);\n};\n\n\n/**\n * Handler for `touchmove`.\n *\n * @param {Event} inEvent The in event.\n */\nTouchSource.prototype.touchmove = function(inEvent) {\n inEvent.preventDefault();\n this.processTouches_(inEvent, this.moveOverOut_);\n};\n\n\n/**\n * @private\n * @param {Event} browserEvent The event.\n * @param {Object} inPointer The in pointer.\n */\nTouchSource.prototype.moveOverOut_ = function(browserEvent, inPointer) {\n const event = inPointer;\n const pointer = this.pointerMap[event.pointerId];\n // a finger drifted off the screen, ignore it\n if (!pointer) {\n return;\n }\n const outEvent = pointer.out;\n const outTarget = pointer.outTarget;\n this.dispatcher.move(event, browserEvent);\n if (outEvent && outTarget !== event.target) {\n outEvent.relatedTarget = event.target;\n event.relatedTarget = outTarget;\n // recover from retargeting by shadow\n outEvent.target = outTarget;\n if (event.target) {\n this.dispatcher.leaveOut(outEvent, browserEvent);\n this.dispatcher.enterOver(event, browserEvent);\n } else {\n // clean up case when finger leaves the screen\n event.target = outTarget;\n event.relatedTarget = null;\n this.cancelOut_(browserEvent, event);\n }\n }\n pointer.out = event;\n pointer.outTarget = event.target;\n};\n\n\n/**\n * Handler for `touchend`, triggers `pointerup`,\n * `pointerout` and `pointerleave` events.\n *\n * @param {Event} inEvent The event.\n */\nTouchSource.prototype.touchend = function(inEvent) {\n this.dedupSynthMouse_(inEvent);\n this.processTouches_(inEvent, this.upOut_);\n};\n\n\n/**\n * @private\n * @param {Event} browserEvent An event.\n * @param {Object} inPointer The inPointer object.\n */\nTouchSource.prototype.upOut_ = function(browserEvent, inPointer) {\n this.dispatcher.up(inPointer, browserEvent);\n this.dispatcher.out(inPointer, browserEvent);\n this.dispatcher.leave(inPointer, browserEvent);\n this.cleanUpPointer_(inPointer);\n};\n\n\n/**\n * Handler for `touchcancel`, triggers `pointercancel`,\n * `pointerout` and `pointerleave` events.\n *\n * @param {Event} inEvent The in event.\n */\nTouchSource.prototype.touchcancel = function(inEvent) {\n this.processTouches_(inEvent, this.cancelOut_);\n};\n\n\n/**\n * @private\n * @param {Event} browserEvent The event.\n * @param {Object} inPointer The in pointer.\n */\nTouchSource.prototype.cancelOut_ = function(browserEvent, inPointer) {\n this.dispatcher.cancel(inPointer, browserEvent);\n this.dispatcher.out(inPointer, browserEvent);\n this.dispatcher.leave(inPointer, browserEvent);\n this.cleanUpPointer_(inPointer);\n};\n\n\n/**\n * @private\n * @param {Object} inPointer The inPointer object.\n */\nTouchSource.prototype.cleanUpPointer_ = function(inPointer) {\n delete this.pointerMap[inPointer.pointerId];\n this.removePrimaryPointer_(inPointer);\n};\n\n\n/**\n * Prevent synth mouse events from creating pointer events.\n *\n * @private\n * @param {Event} inEvent The in event.\n */\nTouchSource.prototype.dedupSynthMouse_ = function(inEvent) {\n const lts = this.mouseSource.lastTouches;\n const t = inEvent.changedTouches[0];\n // only the primary finger will synth mouse events\n if (this.isPrimaryTouch_(t)) {\n // remember x/y of last touch\n const lt = [t.clientX, t.clientY];\n lts.push(lt);\n\n setTimeout(function() {\n // remove touch after timeout\n remove(lts, lt);\n }, this.dedupTimeout_);\n }\n};\nexport default TouchSource;\n","/**\n * @module ol/pointer/PointerEventHandler\n */\n// Based on https://github.com/Polymer/PointerEvents\n\n// Copyright (c) 2013 The Polymer Authors. All rights reserved.\n//\n// Redistribution and use in source and binary forms, with or without\n// modification, are permitted provided that the following conditions are\n// met:\n//\n// * Redistributions of source code must retain the above copyright\n// notice, this list of conditions and the following disclaimer.\n// * Redistributions in binary form must reproduce the above\n// copyright notice, this list of conditions and the following disclaimer\n// in the documentation and/or other materials provided with the\n// distribution.\n// * Neither the name of Google Inc. nor the names of its\n// contributors may be used to endorse or promote products derived from\n// this software without specific prior written permission.\n//\n// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n// \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n\nimport {inherits} from '../util.js';\nimport {listen, unlisten} from '../events.js';\nimport EventTarget from '../events/EventTarget.js';\nimport {POINTER, MSPOINTER, TOUCH} from '../has.js';\nimport PointerEventType from '../pointer/EventType.js';\nimport MouseSource from '../pointer/MouseSource.js';\nimport MsSource from '../pointer/MsSource.js';\nimport NativeSource from '../pointer/NativeSource.js';\nimport PointerEvent from '../pointer/PointerEvent.js';\nimport TouchSource from '../pointer/TouchSource.js';\n\n/**\n * @constructor\n * @extends {module:ol/events/EventTarget}\n * @param {Element|HTMLDocument} element Viewport element.\n */\nconst PointerEventHandler = function(element) {\n EventTarget.call(this);\n\n /**\n * @const\n * @private\n * @type {Element|HTMLDocument}\n */\n this.element_ = element;\n\n /**\n * @const\n * @type {!Object.<string, Event|Object>}\n */\n this.pointerMap = {};\n\n /**\n * @type {Object.<string, function(Event)>}\n * @private\n */\n this.eventMap_ = {};\n\n /**\n * @type {Array.<module:ol/pointer/EventSource>}\n * @private\n */\n this.eventSourceList_ = [];\n\n this.registerSources();\n};\n\ninherits(PointerEventHandler, EventTarget);\n\n/**\n * Properties to copy when cloning an event, with default values.\n * @type {Array.<Array>}\n */\nconst CLONE_PROPS = [\n // MouseEvent\n ['bubbles', false],\n ['cancelable', false],\n ['view', null],\n ['detail', null],\n ['screenX', 0],\n ['screenY', 0],\n ['clientX', 0],\n ['clientY', 0],\n ['ctrlKey', false],\n ['altKey', false],\n ['shiftKey', false],\n ['metaKey', false],\n ['button', 0],\n ['relatedTarget', null],\n // DOM Level 3\n ['buttons', 0],\n // PointerEvent\n ['pointerId', 0],\n ['width', 0],\n ['height', 0],\n ['pressure', 0],\n ['tiltX', 0],\n ['tiltY', 0],\n ['pointerType', ''],\n ['hwTimestamp', 0],\n ['isPrimary', false],\n // event instance\n ['type', ''],\n ['target', null],\n ['currentTarget', null],\n ['which', 0]\n];\n\n\n/**\n * Set up the event sources (mouse, touch and native pointers)\n * that generate pointer events.\n */\nPointerEventHandler.prototype.registerSources = function() {\n if (POINTER) {\n this.registerSource('native', new NativeSource(this));\n } else if (MSPOINTER) {\n this.registerSource('ms', new MsSource(this));\n } else {\n const mouseSource = new MouseSource(this);\n this.registerSource('mouse', mouseSource);\n\n if (TOUCH) {\n this.registerSource('touch', new TouchSource(this, mouseSource));\n }\n }\n\n // register events on the viewport element\n this.register_();\n};\n\n\n/**\n * Add a new event source that will generate pointer events.\n *\n * @param {string} name A name for the event source\n * @param {module:ol/pointer/EventSource} source The source event.\n */\nPointerEventHandler.prototype.registerSource = function(name, source) {\n const s = source;\n const newEvents = s.getEvents();\n\n if (newEvents) {\n newEvents.forEach(function(e) {\n const handler = s.getHandlerForEvent(e);\n\n if (handler) {\n this.eventMap_[e] = handler.bind(s);\n }\n }.bind(this));\n this.eventSourceList_.push(s);\n }\n};\n\n\n/**\n * Set up the events for all registered event sources.\n * @private\n */\nPointerEventHandler.prototype.register_ = function() {\n const l = this.eventSourceList_.length;\n for (let i = 0; i < l; i++) {\n const eventSource = this.eventSourceList_[i];\n this.addEvents_(eventSource.getEvents());\n }\n};\n\n\n/**\n * Remove all registered events.\n * @private\n */\nPointerEventHandler.prototype.unregister_ = function() {\n const l = this.eventSourceList_.length;\n for (let i = 0; i < l; i++) {\n const eventSource = this.eventSourceList_[i];\n this.removeEvents_(eventSource.getEvents());\n }\n};\n\n\n/**\n * Calls the right handler for a new event.\n * @private\n * @param {Event} inEvent Browser event.\n */\nPointerEventHandler.prototype.eventHandler_ = function(inEvent) {\n const type = inEvent.type;\n const handler = this.eventMap_[type];\n if (handler) {\n handler(inEvent);\n }\n};\n\n\n/**\n * Setup listeners for the given events.\n * @private\n * @param {Array.<string>} events List of events.\n */\nPointerEventHandler.prototype.addEvents_ = function(events) {\n events.forEach(function(eventName) {\n listen(this.element_, eventName, this.eventHandler_, this);\n }.bind(this));\n};\n\n\n/**\n * Unregister listeners for the given events.\n * @private\n * @param {Array.<string>} events List of events.\n */\nPointerEventHandler.prototype.removeEvents_ = function(events) {\n events.forEach(function(e) {\n unlisten(this.element_, e, this.eventHandler_, this);\n }.bind(this));\n};\n\n\n/**\n * Returns a snapshot of inEvent, with writable properties.\n *\n * @param {Event} event Browser event.\n * @param {Event|Touch} inEvent An event that contains\n * properties to copy.\n * @return {Object} An object containing shallow copies of\n * `inEvent`'s properties.\n */\nPointerEventHandler.prototype.cloneEvent = function(event, inEvent) {\n const eventCopy = {};\n for (let i = 0, ii = CLONE_PROPS.length; i < ii; i++) {\n const p = CLONE_PROPS[i][0];\n eventCopy[p] = event[p] || inEvent[p] || CLONE_PROPS[i][1];\n }\n\n return eventCopy;\n};\n\n\n// EVENTS\n\n\n/**\n * Triggers a 'pointerdown' event.\n * @param {Object} data Pointer event data.\n * @param {Event} event The event.\n */\nPointerEventHandler.prototype.down = function(data, event) {\n this.fireEvent(PointerEventType.POINTERDOWN, data, event);\n};\n\n\n/**\n * Triggers a 'pointermove' event.\n * @param {Object} data Pointer event data.\n * @param {Event} event The event.\n */\nPointerEventHandler.prototype.move = function(data, event) {\n this.fireEvent(PointerEventType.POINTERMOVE, data, event);\n};\n\n\n/**\n * Triggers a 'pointerup' event.\n * @param {Object} data Pointer event data.\n * @param {Event} event The event.\n */\nPointerEventHandler.prototype.up = function(data, event) {\n this.fireEvent(PointerEventType.POINTERUP, data, event);\n};\n\n\n/**\n * Triggers a 'pointerenter' event.\n * @param {Object} data Pointer event data.\n * @param {Event} event The event.\n */\nPointerEventHandler.prototype.enter = function(data, event) {\n data.bubbles = false;\n this.fireEvent(PointerEventType.POINTERENTER, data, event);\n};\n\n\n/**\n * Triggers a 'pointerleave' event.\n * @param {Object} data Pointer event data.\n * @param {Event} event The event.\n */\nPointerEventHandler.prototype.leave = function(data, event) {\n data.bubbles = false;\n this.fireEvent(PointerEventType.POINTERLEAVE, data, event);\n};\n\n\n/**\n * Triggers a 'pointerover' event.\n * @param {Object} data Pointer event data.\n * @param {Event} event The event.\n */\nPointerEventHandler.prototype.over = function(data, event) {\n data.bubbles = true;\n this.fireEvent(PointerEventType.POINTEROVER, data, event);\n};\n\n\n/**\n * Triggers a 'pointerout' event.\n * @param {Object} data Pointer event data.\n * @param {Event} event The event.\n */\nPointerEventHandler.prototype.out = function(data, event) {\n data.bubbles = true;\n this.fireEvent(PointerEventType.POINTEROUT, data, event);\n};\n\n\n/**\n * Triggers a 'pointercancel' event.\n * @param {Object} data Pointer event data.\n * @param {Event} event The event.\n */\nPointerEventHandler.prototype.cancel = function(data, event) {\n this.fireEvent(PointerEventType.POINTERCANCEL, data, event);\n};\n\n\n/**\n * Triggers a combination of 'pointerout' and 'pointerleave' events.\n * @param {Object} data Pointer event data.\n * @param {Event} event The event.\n */\nPointerEventHandler.prototype.leaveOut = function(data, event) {\n this.out(data, event);\n if (!this.contains_(data.target, data.relatedTarget)) {\n this.leave(data, event);\n }\n};\n\n\n/**\n * Triggers a combination of 'pointerover' and 'pointerevents' events.\n * @param {Object} data Pointer event data.\n * @param {Event} event The event.\n */\nPointerEventHandler.prototype.enterOver = function(data, event) {\n this.over(data, event);\n if (!this.contains_(data.target, data.relatedTarget)) {\n this.enter(data, event);\n }\n};\n\n\n/**\n * @private\n * @param {Element} container The container element.\n * @param {Element} contained The contained element.\n * @return {boolean} Returns true if the container element\n * contains the other element.\n */\nPointerEventHandler.prototype.contains_ = function(container, contained) {\n if (!container || !contained) {\n return false;\n }\n return container.contains(contained);\n};\n\n\n// EVENT CREATION AND TRACKING\n/**\n * Creates a new Event of type `inType`, based on the information in\n * `data`.\n *\n * @param {string} inType A string representing the type of event to create.\n * @param {Object} data Pointer event data.\n * @param {Event} event The event.\n * @return {module:ol/pointer/PointerEvent} A PointerEvent of type `inType`.\n */\nPointerEventHandler.prototype.makeEvent = function(inType, data, event) {\n return new PointerEvent(inType, event, data);\n};\n\n\n/**\n * Make and dispatch an event in one call.\n * @param {string} inType A string representing the type of event.\n * @param {Object} data Pointer event data.\n * @param {Event} event The event.\n */\nPointerEventHandler.prototype.fireEvent = function(inType, data, event) {\n const e = this.makeEvent(inType, data, event);\n this.dispatchEvent(e);\n};\n\n\n/**\n * Creates a pointer event from a native pointer event\n * and dispatches this event.\n * @param {Event} event A platform event with a target.\n */\nPointerEventHandler.prototype.fireNativeEvent = function(event) {\n const e = this.makeEvent(event.type, event, event);\n this.dispatchEvent(e);\n};\n\n\n/**\n * Wrap a native mouse event into a pointer event.\n * This proxy method is required for the legacy IE support.\n * @param {string} eventType The pointer event type.\n * @param {Event} event The event.\n * @return {module:ol/pointer/PointerEvent} The wrapped event.\n */\nPointerEventHandler.prototype.wrapMouseEvent = function(eventType, event) {\n const pointerEvent = this.makeEvent(\n eventType, MouseSource.prepareEvent(event, this), event);\n return pointerEvent;\n};\n\n\n/**\n * @inheritDoc\n */\nPointerEventHandler.prototype.disposeInternal = function() {\n this.unregister_();\n EventTarget.prototype.disposeInternal.call(this);\n};\n\n\nexport default PointerEventHandler;\n","/**\n * @module ol/MapBrowserEventHandler\n */\nimport {inherits} from './util.js';\nimport {DEVICE_PIXEL_RATIO} from './has.js';\nimport MapBrowserEventType from './MapBrowserEventType.js';\nimport MapBrowserPointerEvent from './MapBrowserPointerEvent.js';\nimport {listen, unlistenByKey} from './events.js';\nimport EventTarget from './events/EventTarget.js';\nimport PointerEventType from './pointer/EventType.js';\nimport PointerEventHandler from './pointer/PointerEventHandler.js';\n\n/**\n * @param {module:ol/PluggableMap} map The map with the viewport to\n * listen to events on.\n * @param {number=} moveTolerance The minimal distance the pointer must travel\n * to trigger a move.\n * @constructor\n * @extends {module:ol/events/EventTarget}\n */\nconst MapBrowserEventHandler = function(map, moveTolerance) {\n\n EventTarget.call(this);\n\n /**\n * This is the element that we will listen to the real events on.\n * @type {module:ol/PluggableMap}\n * @private\n */\n this.map_ = map;\n\n /**\n * @type {number}\n * @private\n */\n this.clickTimeoutId_ = 0;\n\n /**\n * @type {boolean}\n * @private\n */\n this.dragging_ = false;\n\n /**\n * @type {!Array.<module:ol/events~EventsKey>}\n * @private\n */\n this.dragListenerKeys_ = [];\n\n /**\n * @type {number}\n * @private\n */\n this.moveTolerance_ = moveTolerance ?\n moveTolerance * DEVICE_PIXEL_RATIO : DEVICE_PIXEL_RATIO;\n\n /**\n * The most recent \"down\" type event (or null if none have occurred).\n * Set on pointerdown.\n * @type {module:ol/pointer/PointerEvent}\n * @private\n */\n this.down_ = null;\n\n const element = this.map_.getViewport();\n\n /**\n * @type {number}\n * @private\n */\n this.activePointers_ = 0;\n\n /**\n * @type {!Object.<number, boolean>}\n * @private\n */\n this.trackedTouches_ = {};\n\n /**\n * Event handler which generates pointer events for\n * the viewport element.\n *\n * @type {module:ol/pointer/PointerEventHandler}\n * @private\n */\n this.pointerEventHandler_ = new PointerEventHandler(element);\n\n /**\n * Event handler which generates pointer events for\n * the document (used when dragging).\n *\n * @type {module:ol/pointer/PointerEventHandler}\n * @private\n */\n this.documentPointerEventHandler_ = null;\n\n /**\n * @type {?module:ol/events~EventsKey}\n * @private\n */\n this.pointerdownListenerKey_ = listen(this.pointerEventHandler_,\n PointerEventType.POINTERDOWN,\n this.handlePointerDown_, this);\n\n /**\n * @type {?module:ol/events~EventsKey}\n * @private\n */\n this.relayedListenerKey_ = listen(this.pointerEventHandler_,\n PointerEventType.POINTERMOVE,\n this.relayEvent_, this);\n\n};\n\ninherits(MapBrowserEventHandler, EventTarget);\n\n\n/**\n * @param {module:ol/pointer/PointerEvent} pointerEvent Pointer\n * event.\n * @private\n */\nMapBrowserEventHandler.prototype.emulateClick_ = function(pointerEvent) {\n let newEvent = new MapBrowserPointerEvent(\n MapBrowserEventType.CLICK, this.map_, pointerEvent);\n this.dispatchEvent(newEvent);\n if (this.clickTimeoutId_ !== 0) {\n // double-click\n clearTimeout(this.clickTimeoutId_);\n this.clickTimeoutId_ = 0;\n newEvent = new MapBrowserPointerEvent(\n MapBrowserEventType.DBLCLICK, this.map_, pointerEvent);\n this.dispatchEvent(newEvent);\n } else {\n // click\n this.clickTimeoutId_ = setTimeout(function() {\n this.clickTimeoutId_ = 0;\n const newEvent = new MapBrowserPointerEvent(\n MapBrowserEventType.SINGLECLICK, this.map_, pointerEvent);\n this.dispatchEvent(newEvent);\n }.bind(this), 250);\n }\n};\n\n\n/**\n * Keeps track on how many pointers are currently active.\n *\n * @param {module:ol/pointer/PointerEvent} pointerEvent Pointer\n * event.\n * @private\n */\nMapBrowserEventHandler.prototype.updateActivePointers_ = function(pointerEvent) {\n const event = pointerEvent;\n\n if (event.type == MapBrowserEventType.POINTERUP ||\n event.type == MapBrowserEventType.POINTERCANCEL) {\n delete this.trackedTouches_[event.pointerId];\n } else if (event.type == MapBrowserEventType.POINTERDOWN) {\n this.trackedTouches_[event.pointerId] = true;\n }\n this.activePointers_ = Object.keys(this.trackedTouches_).length;\n};\n\n\n/**\n * @param {module:ol/pointer/PointerEvent} pointerEvent Pointer\n * event.\n * @private\n */\nMapBrowserEventHandler.prototype.handlePointerUp_ = function(pointerEvent) {\n this.updateActivePointers_(pointerEvent);\n const newEvent = new MapBrowserPointerEvent(\n MapBrowserEventType.POINTERUP, this.map_, pointerEvent);\n this.dispatchEvent(newEvent);\n\n // We emulate click events on left mouse button click, touch contact, and pen\n // contact. isMouseActionButton returns true in these cases (evt.button is set\n // to 0).\n // See http://www.w3.org/TR/pointerevents/#button-states\n // We only fire click, singleclick, and doubleclick if nobody has called\n // event.stopPropagation() or event.preventDefault().\n if (!newEvent.propagationStopped && !this.dragging_ && this.isMouseActionButton_(pointerEvent)) {\n this.emulateClick_(this.down_);\n }\n\n if (this.activePointers_ === 0) {\n this.dragListenerKeys_.forEach(unlistenByKey);\n this.dragListenerKeys_.length = 0;\n this.dragging_ = false;\n this.down_ = null;\n this.documentPointerEventHandler_.dispose();\n this.documentPointerEventHandler_ = null;\n }\n};\n\n\n/**\n * @param {module:ol/pointer/PointerEvent} pointerEvent Pointer\n * event.\n * @return {boolean} If the left mouse button was pressed.\n * @private\n */\nMapBrowserEventHandler.prototype.isMouseActionButton_ = function(pointerEvent) {\n return pointerEvent.button === 0;\n};\n\n\n/**\n * @param {module:ol/pointer/PointerEvent} pointerEvent Pointer\n * event.\n * @private\n */\nMapBrowserEventHandler.prototype.handlePointerDown_ = function(pointerEvent) {\n this.updateActivePointers_(pointerEvent);\n const newEvent = new MapBrowserPointerEvent(\n MapBrowserEventType.POINTERDOWN, this.map_, pointerEvent);\n this.dispatchEvent(newEvent);\n\n this.down_ = pointerEvent;\n\n if (this.dragListenerKeys_.length === 0) {\n /* Set up a pointer event handler on the `document`,\n * which is required when the pointer is moved outside\n * the viewport when dragging.\n */\n this.documentPointerEventHandler_ =\n new PointerEventHandler(document);\n\n this.dragListenerKeys_.push(\n listen(this.documentPointerEventHandler_,\n MapBrowserEventType.POINTERMOVE,\n this.handlePointerMove_, this),\n listen(this.documentPointerEventHandler_,\n MapBrowserEventType.POINTERUP,\n this.handlePointerUp_, this),\n /* Note that the listener for `pointercancel is set up on\n * `pointerEventHandler_` and not `documentPointerEventHandler_` like\n * the `pointerup` and `pointermove` listeners.\n *\n * The reason for this is the following: `TouchSource.vacuumTouches_()`\n * issues `pointercancel` events, when there was no `touchend` for a\n * `touchstart`. Now, let's say a first `touchstart` is registered on\n * `pointerEventHandler_`. The `documentPointerEventHandler_` is set up.\n * But `documentPointerEventHandler_` doesn't know about the first\n * `touchstart`. If there is no `touchend` for the `touchstart`, we can\n * only receive a `touchcancel` from `pointerEventHandler_`, because it is\n * only registered there.\n */\n listen(this.pointerEventHandler_,\n MapBrowserEventType.POINTERCANCEL,\n this.handlePointerUp_, this)\n );\n }\n};\n\n\n/**\n * @param {module:ol/pointer/PointerEvent} pointerEvent Pointer\n * event.\n * @private\n */\nMapBrowserEventHandler.prototype.handlePointerMove_ = function(pointerEvent) {\n // Between pointerdown and pointerup, pointermove events are triggered.\n // To avoid a 'false' touchmove event to be dispatched, we test if the pointer\n // moved a significant distance.\n if (this.isMoving_(pointerEvent)) {\n this.dragging_ = true;\n const newEvent = new MapBrowserPointerEvent(\n MapBrowserEventType.POINTERDRAG, this.map_, pointerEvent,\n this.dragging_);\n this.dispatchEvent(newEvent);\n }\n\n // Some native android browser triggers mousemove events during small period\n // of time. See: https://code.google.com/p/android/issues/detail?id=5491 or\n // https://code.google.com/p/android/issues/detail?id=19827\n // ex: Galaxy Tab P3110 + Android 4.1.1\n pointerEvent.preventDefault();\n};\n\n\n/**\n * Wrap and relay a pointer event. Note that this requires that the type\n * string for the MapBrowserPointerEvent matches the PointerEvent type.\n * @param {module:ol/pointer/PointerEvent} pointerEvent Pointer\n * event.\n * @private\n */\nMapBrowserEventHandler.prototype.relayEvent_ = function(pointerEvent) {\n const dragging = !!(this.down_ && this.isMoving_(pointerEvent));\n this.dispatchEvent(new MapBrowserPointerEvent(\n pointerEvent.type, this.map_, pointerEvent, dragging));\n};\n\n\n/**\n * @param {module:ol/pointer/PointerEvent} pointerEvent Pointer\n * event.\n * @return {boolean} Is moving.\n * @private\n */\nMapBrowserEventHandler.prototype.isMoving_ = function(pointerEvent) {\n return this.dragging_ ||\n Math.abs(pointerEvent.clientX - this.down_.clientX) > this.moveTolerance_ ||\n Math.abs(pointerEvent.clientY - this.down_.clientY) > this.moveTolerance_;\n};\n\n\n/**\n * @inheritDoc\n */\nMapBrowserEventHandler.prototype.disposeInternal = function() {\n if (this.relayedListenerKey_) {\n unlistenByKey(this.relayedListenerKey_);\n this.relayedListenerKey_ = null;\n }\n if (this.pointerdownListenerKey_) {\n unlistenByKey(this.pointerdownListenerKey_);\n this.pointerdownListenerKey_ = null;\n }\n\n this.dragListenerKeys_.forEach(unlistenByKey);\n this.dragListenerKeys_.length = 0;\n\n if (this.documentPointerEventHandler_) {\n this.documentPointerEventHandler_.dispose();\n this.documentPointerEventHandler_ = null;\n }\n if (this.pointerEventHandler_) {\n this.pointerEventHandler_.dispose();\n this.pointerEventHandler_ = null;\n }\n EventTarget.prototype.disposeInternal.call(this);\n};\nexport default MapBrowserEventHandler;\n","/**\n * @module ol/MapEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n\n /**\n * Triggered after a map frame is rendered.\n * @event module:ol/MapEvent~MapEvent#postrender\n * @api\n */\n POSTRENDER: 'postrender',\n\n /**\n * Triggered when the map starts moving.\n * @event module:ol/MapEvent~MapEvent#movestart\n * @api\n */\n MOVESTART: 'movestart',\n\n /**\n * Triggered after the map is moved.\n * @event module:ol/MapEvent~MapEvent#moveend\n * @api\n */\n MOVEEND: 'moveend'\n\n};\n","/**\n * @module ol/MapProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n LAYERGROUP: 'layergroup',\n SIZE: 'size',\n TARGET: 'target',\n VIEW: 'view'\n};\n","/**\n * @module ol/structs/PriorityQueue\n */\nimport {assert} from '../asserts.js';\nimport {clear} from '../obj.js';\n\n/**\n * Priority queue.\n *\n * The implementation is inspired from the Closure Library's Heap class and\n * Python's heapq module.\n *\n * @see http://closure-library.googlecode.com/svn/docs/closure_goog_structs_heap.js.source.html\n * @see http://hg.python.org/cpython/file/2.7/Lib/heapq.py\n *\n * @constructor\n * @param {function(T): number} priorityFunction Priority function.\n * @param {function(T): string} keyFunction Key function.\n * @struct\n * @template T\n */\nconst PriorityQueue = function(priorityFunction, keyFunction) {\n\n /**\n * @type {function(T): number}\n * @private\n */\n this.priorityFunction_ = priorityFunction;\n\n /**\n * @type {function(T): string}\n * @private\n */\n this.keyFunction_ = keyFunction;\n\n /**\n * @type {Array.<T>}\n * @private\n */\n this.elements_ = [];\n\n /**\n * @type {Array.<number>}\n * @private\n */\n this.priorities_ = [];\n\n /**\n * @type {!Object.<string, boolean>}\n * @private\n */\n this.queuedElements_ = {};\n\n};\n\n\n/**\n * @type {number}\n */\nexport const DROP = Infinity;\n\n\n/**\n * FIXME empty description for jsdoc\n */\nPriorityQueue.prototype.clear = function() {\n this.elements_.length = 0;\n this.priorities_.length = 0;\n clear(this.queuedElements_);\n};\n\n\n/**\n * Remove and return the highest-priority element. O(log N).\n * @return {T} Element.\n */\nPriorityQueue.prototype.dequeue = function() {\n const elements = this.elements_;\n const priorities = this.priorities_;\n const element = elements[0];\n if (elements.length == 1) {\n elements.length = 0;\n priorities.length = 0;\n } else {\n elements[0] = elements.pop();\n priorities[0] = priorities.pop();\n this.siftUp_(0);\n }\n const elementKey = this.keyFunction_(element);\n delete this.queuedElements_[elementKey];\n return element;\n};\n\n\n/**\n * Enqueue an element. O(log N).\n * @param {T} element Element.\n * @return {boolean} The element was added to the queue.\n */\nPriorityQueue.prototype.enqueue = function(element) {\n assert(!(this.keyFunction_(element) in this.queuedElements_),\n 31); // Tried to enqueue an `element` that was already added to the queue\n const priority = this.priorityFunction_(element);\n if (priority != DROP) {\n this.elements_.push(element);\n this.priorities_.push(priority);\n this.queuedElements_[this.keyFunction_(element)] = true;\n this.siftDown_(0, this.elements_.length - 1);\n return true;\n }\n return false;\n};\n\n\n/**\n * @return {number} Count.\n */\nPriorityQueue.prototype.getCount = function() {\n return this.elements_.length;\n};\n\n\n/**\n * Gets the index of the left child of the node at the given index.\n * @param {number} index The index of the node to get the left child for.\n * @return {number} The index of the left child.\n * @private\n */\nPriorityQueue.prototype.getLeftChildIndex_ = function(index) {\n return index * 2 + 1;\n};\n\n\n/**\n * Gets the index of the right child of the node at the given index.\n * @param {number} index The index of the node to get the right child for.\n * @return {number} The index of the right child.\n * @private\n */\nPriorityQueue.prototype.getRightChildIndex_ = function(index) {\n return index * 2 + 2;\n};\n\n\n/**\n * Gets the index of the parent of the node at the given index.\n * @param {number} index The index of the node to get the parent for.\n * @return {number} The index of the parent.\n * @private\n */\nPriorityQueue.prototype.getParentIndex_ = function(index) {\n return (index - 1) >> 1;\n};\n\n\n/**\n * Make this a heap. O(N).\n * @private\n */\nPriorityQueue.prototype.heapify_ = function() {\n let i;\n for (i = (this.elements_.length >> 1) - 1; i >= 0; i--) {\n this.siftUp_(i);\n }\n};\n\n\n/**\n * @return {boolean} Is empty.\n */\nPriorityQueue.prototype.isEmpty = function() {\n return this.elements_.length === 0;\n};\n\n\n/**\n * @param {string} key Key.\n * @return {boolean} Is key queued.\n */\nPriorityQueue.prototype.isKeyQueued = function(key) {\n return key in this.queuedElements_;\n};\n\n\n/**\n * @param {T} element Element.\n * @return {boolean} Is queued.\n */\nPriorityQueue.prototype.isQueued = function(element) {\n return this.isKeyQueued(this.keyFunction_(element));\n};\n\n\n/**\n * @param {number} index The index of the node to move down.\n * @private\n */\nPriorityQueue.prototype.siftUp_ = function(index) {\n const elements = this.elements_;\n const priorities = this.priorities_;\n const count = elements.length;\n const element = elements[index];\n const priority = priorities[index];\n const startIndex = index;\n\n while (index < (count >> 1)) {\n const lIndex = this.getLeftChildIndex_(index);\n const rIndex = this.getRightChildIndex_(index);\n\n const smallerChildIndex = rIndex < count &&\n priorities[rIndex] < priorities[lIndex] ?\n rIndex : lIndex;\n\n elements[index] = elements[smallerChildIndex];\n priorities[index] = priorities[smallerChildIndex];\n index = smallerChildIndex;\n }\n\n elements[index] = element;\n priorities[index] = priority;\n this.siftDown_(startIndex, index);\n};\n\n\n/**\n * @param {number} startIndex The index of the root.\n * @param {number} index The index of the node to move up.\n * @private\n */\nPriorityQueue.prototype.siftDown_ = function(startIndex, index) {\n const elements = this.elements_;\n const priorities = this.priorities_;\n const element = elements[index];\n const priority = priorities[index];\n\n while (index > startIndex) {\n const parentIndex = this.getParentIndex_(index);\n if (priorities[parentIndex] > priority) {\n elements[index] = elements[parentIndex];\n priorities[index] = priorities[parentIndex];\n index = parentIndex;\n } else {\n break;\n }\n }\n elements[index] = element;\n priorities[index] = priority;\n};\n\n\n/**\n * FIXME empty description for jsdoc\n */\nPriorityQueue.prototype.reprioritize = function() {\n const priorityFunction = this.priorityFunction_;\n const elements = this.elements_;\n const priorities = this.priorities_;\n let index = 0;\n const n = elements.length;\n let element, i, priority;\n for (i = 0; i < n; ++i) {\n element = elements[i];\n priority = priorityFunction(element);\n if (priority == DROP) {\n delete this.queuedElements_[this.keyFunction_(element)];\n } else {\n priorities[index] = priority;\n elements[index++] = element;\n }\n }\n elements.length = index;\n priorities.length = index;\n this.heapify_();\n};\nexport default PriorityQueue;\n","/**\n * @module ol/TileQueue\n */\nimport {inherits} from './util.js';\nimport TileState from './TileState.js';\nimport {listen, unlisten} from './events.js';\nimport EventType from './events/EventType.js';\nimport PriorityQueue from './structs/PriorityQueue.js';\n\n\n/**\n * @typedef {function(module:ol/Tile, string, module:ol/coordinate~Coordinate, number): number} PriorityFunction\n */\n\n\n/**\n * @constructor\n * @extends {module:ol/structs/PriorityQueue.<Array>}\n * @param {module:ol/TileQueue~PriorityFunction} tilePriorityFunction\n * Tile priority function.\n * @param {function(): ?} tileChangeCallback\n * Function called on each tile change event.\n * @struct\n */\nconst TileQueue = function(tilePriorityFunction, tileChangeCallback) {\n\n PriorityQueue.call(\n this,\n /**\n * @param {Array} element Element.\n * @return {number} Priority.\n */\n function(element) {\n return tilePriorityFunction.apply(null, element);\n },\n /**\n * @param {Array} element Element.\n * @return {string} Key.\n */\n function(element) {\n return (/** @type {module:ol/Tile} */ (element[0]).getKey());\n });\n\n /**\n * @private\n * @type {function(): ?}\n */\n this.tileChangeCallback_ = tileChangeCallback;\n\n /**\n * @private\n * @type {number}\n */\n this.tilesLoading_ = 0;\n\n /**\n * @private\n * @type {!Object.<string,boolean>}\n */\n this.tilesLoadingKeys_ = {};\n\n};\n\ninherits(TileQueue, PriorityQueue);\n\n\n/**\n * @inheritDoc\n */\nTileQueue.prototype.enqueue = function(element) {\n const added = PriorityQueue.prototype.enqueue.call(this, element);\n if (added) {\n const tile = element[0];\n listen(tile, EventType.CHANGE, this.handleTileChange, this);\n }\n return added;\n};\n\n\n/**\n * @return {number} Number of tiles loading.\n */\nTileQueue.prototype.getTilesLoading = function() {\n return this.tilesLoading_;\n};\n\n\n/**\n * @param {module:ol/events/Event} event Event.\n * @protected\n */\nTileQueue.prototype.handleTileChange = function(event) {\n const tile = /** @type {module:ol/Tile} */ (event.target);\n const state = tile.getState();\n if (state === TileState.LOADED || state === TileState.ERROR ||\n state === TileState.EMPTY || state === TileState.ABORT) {\n unlisten(tile, EventType.CHANGE, this.handleTileChange, this);\n const tileKey = tile.getKey();\n if (tileKey in this.tilesLoadingKeys_) {\n delete this.tilesLoadingKeys_[tileKey];\n --this.tilesLoading_;\n }\n this.tileChangeCallback_();\n }\n};\n\n\n/**\n * @param {number} maxTotalLoading Maximum number tiles to load simultaneously.\n * @param {number} maxNewLoads Maximum number of new tiles to load.\n */\nTileQueue.prototype.loadMoreTiles = function(maxTotalLoading, maxNewLoads) {\n let newLoads = 0;\n let abortedTiles = false;\n let state, tile, tileKey;\n while (this.tilesLoading_ < maxTotalLoading && newLoads < maxNewLoads &&\n this.getCount() > 0) {\n tile = /** @type {module:ol/Tile} */ (this.dequeue()[0]);\n tileKey = tile.getKey();\n state = tile.getState();\n if (state === TileState.ABORT) {\n abortedTiles = true;\n } else if (state === TileState.IDLE && !(tileKey in this.tilesLoadingKeys_)) {\n this.tilesLoadingKeys_[tileKey] = true;\n ++this.tilesLoading_;\n ++newLoads;\n tile.load();\n }\n }\n if (newLoads === 0 && abortedTiles) {\n // Do not stop the render loop when all wanted tiles were aborted due to\n // a small, saturated tile cache.\n this.tileChangeCallback_();\n }\n};\nexport default TileQueue;\n","/**\n * @module ol/tilegrid/common\n */\n\n/**\n * Default maximum zoom for default tile grids.\n * @type {number}\n */\nexport const DEFAULT_MAX_ZOOM = 42;\n\n/**\n * Default tile size.\n * @type {number}\n */\nexport const DEFAULT_TILE_SIZE = 256;\n","/**\n * @module ol/centerconstraint\n */\nimport {clamp} from './math.js';\n\n\n/**\n * @typedef {function((module:ol/coordinate~Coordinate|undefined)): (module:ol/coordinate~Coordinate|undefined)} Type\n */\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {module:ol/centerconstraint~Type} The constraint.\n */\nexport function createExtent(extent) {\n return (\n /**\n * @param {module:ol/coordinate~Coordinate=} center Center.\n * @return {module:ol/coordinate~Coordinate|undefined} Center.\n */\n function(center) {\n if (center) {\n return [\n clamp(center[0], extent[0], extent[2]),\n clamp(center[1], extent[1], extent[3])\n ];\n } else {\n return undefined;\n }\n }\n );\n}\n\n\n/**\n * @param {module:ol/coordinate~Coordinate=} center Center.\n * @return {module:ol/coordinate~Coordinate|undefined} Center.\n */\nexport function none(center) {\n return center;\n}\n","/**\n * @module ol/rotationconstraint\n */\nimport {toRadians} from './math.js';\n\n\n/**\n * @typedef {function((number|undefined), number): (number|undefined)} Type\n */\n\n\n/**\n * @param {number|undefined} rotation Rotation.\n * @param {number} delta Delta.\n * @return {number|undefined} Rotation.\n */\nexport function disable(rotation, delta) {\n if (rotation !== undefined) {\n return 0;\n } else {\n return undefined;\n }\n}\n\n\n/**\n * @param {number|undefined} rotation Rotation.\n * @param {number} delta Delta.\n * @return {number|undefined} Rotation.\n */\nexport function none(rotation, delta) {\n if (rotation !== undefined) {\n return rotation + delta;\n } else {\n return undefined;\n }\n}\n\n\n/**\n * @param {number} n N.\n * @return {module:ol/rotationconstraint~Type} Rotation constraint.\n */\nexport function createSnapToN(n) {\n const theta = 2 * Math.PI / n;\n return (\n /**\n * @param {number|undefined} rotation Rotation.\n * @param {number} delta Delta.\n * @return {number|undefined} Rotation.\n */\n function(rotation, delta) {\n if (rotation !== undefined) {\n rotation = Math.floor((rotation + delta) / theta + 0.5) * theta;\n return rotation;\n } else {\n return undefined;\n }\n });\n}\n\n\n/**\n * @param {number=} opt_tolerance Tolerance.\n * @return {module:ol/rotationconstraint~Type} Rotation constraint.\n */\nexport function createSnapToZero(opt_tolerance) {\n const tolerance = opt_tolerance || toRadians(5);\n return (\n /**\n * @param {number|undefined} rotation Rotation.\n * @param {number} delta Delta.\n * @return {number|undefined} Rotation.\n */\n function(rotation, delta) {\n if (rotation !== undefined) {\n if (Math.abs(rotation + delta) <= tolerance) {\n return 0;\n } else {\n return rotation + delta;\n }\n } else {\n return undefined;\n }\n });\n}\n","/**\n * @module ol/ViewHint\n */\n\n/**\n * @enum {number}\n */\nexport default {\n ANIMATING: 0,\n INTERACTING: 1\n};\n","/**\n * @module ol/ViewProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n CENTER: 'center',\n RESOLUTION: 'resolution',\n ROTATION: 'rotation'\n};\n","/**\n * @module ol/View\n */\nimport {DEFAULT_TILE_SIZE} from './tilegrid/common.js';\nimport {getUid, inherits} from './util.js';\nimport {UNDEFINED} from './functions.js';\nimport {createExtent, none as centerNone} from './centerconstraint.js';\nimport BaseObject from './Object.js';\nimport {createSnapToResolutions, createSnapToPower} from './resolutionconstraint.js';\nimport {createSnapToZero, createSnapToN, none as rotationNone, disable} from './rotationconstraint.js';\nimport ViewHint from './ViewHint.js';\nimport ViewProperty from './ViewProperty.js';\nimport {linearFindNearest} from './array.js';\nimport {assert} from './asserts.js';\nimport {add as addCoordinate, rotate as rotateCoordinate, equals as coordinatesEqual} from './coordinate.js';\nimport {inAndOut} from './easing.js';\nimport {getForViewAndSize, getCenter, getHeight, getWidth, isEmpty} from './extent.js';\nimport GeometryType from './geom/GeometryType.js';\nimport {fromExtent as polygonFromExtent} from './geom/Polygon.js';\nimport SimpleGeometry from './geom/SimpleGeometry.js';\nimport {clamp, modulo} from './math.js';\nimport {assign} from './obj.js';\nimport {createProjection, METERS_PER_UNIT} from './proj.js';\nimport Units from './proj/Units.js';\n\n\n/**\n * An animation configuration\n *\n * @typedef {Object} Animation\n * @property {module:ol/coordinate~Coordinate} [sourceCenter]\n * @property {module:ol/coordinate~Coordinate} [targetCenter]\n * @property {number} [sourceResolution]\n * @property {number} [targetResolution]\n * @property {number} [sourceRotation]\n * @property {number} [sourceRotation]\n * @property {module:ol/coordinate~Coordinate} [anchor]\n * @property {number} start\n * @property {number} duration\n * @property {boolean} complete\n * @property {function(number):number} easing\n * @property {function(boolean)} callback\n */\n\n\n/**\n * @typedef {Object} Constraints\n * @property {module:ol/centerconstraint~Type} center\n * @property {module:ol/resolutionconstraint~Type} resolution\n * @property {module:ol/rotationconstraint~Type} rotation\n */\n\n\n/**\n * @typedef {Object} FitOptions\n * @property {module:ol/size~Size} [size] The size in pixels of the box to fit\n * the extent into. Default is the current size of the first map in the DOM that\n * uses this view, or `[100, 100]` if no such map is found.\n * @property {!Array.<number>} [padding=[0, 0, 0, 0]] Padding (in pixels) to be\n * cleared inside the view. Values in the array are top, right, bottom and left\n * padding.\n * @property {boolean} [constrainResolution=true] Constrain the resolution.\n * @property {boolean} [nearest=false] If `constrainResolution` is `true`, get\n * the nearest extent instead of the closest that actually fits the view.\n * @property {number} [minResolution=0] Minimum resolution that we zoom to.\n * @property {number} [maxZoom] Maximum zoom level that we zoom to. If\n * `minResolution` is given, this property is ignored.\n * @property {number} [duration] The duration of the animation in milliseconds.\n * By default, there is no animation to the target extent.\n * @property {function(number):number} [easing] The easing function used during\n * the animation (defaults to {@link module:ol/easing~inAndOut}).\n * The function will be called for each frame with a number representing a\n * fraction of the animation's duration. The function should return a number\n * between 0 and 1 representing the progress toward the destination state.\n * @property {function(boolean)} [callback] Function called when the view is in\n * its final position. The callback will be called with `true` if the animation\n * series completed on its own or `false` if it was cancelled.\n */\n\n\n/**\n * @typedef {Object} ViewOptions\n * @property {module:ol/coordinate~Coordinate} [center] The initial center for\n * the view. The coordinate system for the center is specified with the\n * `projection` option. Layer sources will not be fetched if this is not set,\n * but the center can be set later with {@link #setCenter}.\n * @property {boolean|number} [constrainRotation=true] Rotation constraint.\n * `false` means no constraint. `true` means no constraint, but snap to zero\n * near zero. A number constrains the rotation to that number of values. For\n * example, `4` will constrain the rotation to 0, 90, 180, and 270 degrees.\n * @property {boolean} [enableRotation=true] Enable rotation.\n * If `false`, a rotation constraint that always sets the rotation to zero is\n * used. The `constrainRotation` option has no effect if `enableRotation` is\n * `false`.\n * @property {module:ol/extent~Extent} [extent] The extent that constrains the\n * center, in other words, center cannot be set outside this extent.\n * @property {number} [maxResolution] The maximum resolution used to determine\n * the resolution constraint. It is used together with `minResolution` (or\n * `maxZoom`) and `zoomFactor`. If unspecified it is calculated in such a way\n * that the projection's validity extent fits in a 256x256 px tile. If the\n * projection is Spherical Mercator (the default) then `maxResolution` defaults\n * to `40075016.68557849 / 256 = 156543.03392804097`.\n * @property {number} [minResolution] The minimum resolution used to determine\n * the resolution constraint. It is used together with `maxResolution` (or\n * `minZoom`) and `zoomFactor`. If unspecified it is calculated assuming 29\n * zoom levels (with a factor of 2). If the projection is Spherical Mercator\n * (the default) then `minResolution` defaults to\n * `40075016.68557849 / 256 / Math.pow(2, 28) = 0.0005831682455839253`.\n * @property {number} [maxZoom=28] The maximum zoom level used to determine the\n * resolution constraint. It is used together with `minZoom` (or\n * `maxResolution`) and `zoomFactor`. Note that if `minResolution` is also\n * provided, it is given precedence over `maxZoom`.\n * @property {number} [minZoom=0] The minimum zoom level used to determine the\n * resolution constraint. It is used together with `maxZoom` (or\n * `minResolution`) and `zoomFactor`. Note that if `maxResolution` is also\n * provided, it is given precedence over `minZoom`.\n * @property {module:ol/proj~ProjectionLike} [projection='EPSG:3857'] The\n * projection. The default is Spherical Mercator.\n * @property {number} [resolution] The initial resolution for the view. The\n * units are `projection` units per pixel (e.g. meters per pixel). An\n * alternative to setting this is to set `zoom`. Layer sources will not be\n * fetched if neither this nor `zoom` are defined, but they can be set later\n * with {@link #setZoom} or {@link #setResolution}.\n * @property {Array.<number>} [resolutions] Resolutions to determine the\n * resolution constraint. If set the `maxResolution`, `minResolution`,\n * `minZoom`, `maxZoom`, and `zoomFactor` options are ignored.\n * @property {number} [rotation=0] The initial rotation for the view in radians\n * (positive rotation clockwise, 0 means North).\n * @property {number} [zoom] Only used if `resolution` is not defined. Zoom\n * level used to calculate the initial resolution for the view. The initial\n * resolution is determined using the {@link #constrainResolution} method.\n * @property {number} [zoomFactor=2] The zoom factor used to determine the\n * resolution constraint.\n */\n\n\n/**\n * @typedef {Object} AnimationOptions\n * @property {module:ol/coordinate~Coordinate|undefined} center The center of the view at the end of\n * the animation.\n * @property {number|undefined} zoom The zoom level of the view at the end of the\n * animation. This takes precedence over `resolution`.\n * @property {number|undefined} resolution The resolution of the view at the end\n * of the animation. If `zoom` is also provided, this option will be ignored.\n * @property {number|undefined} rotation The rotation of the view at the end of\n * the animation.\n * @property {module:ol/coordinate~Coordinate|undefined} anchor Optional anchor to remained fixed\n * during a rotation or resolution animation.\n * @property {number} [duration=1000] The duration of the animation in milliseconds.\n * @property {function(number):number} [easing] The easing function used\n * during the animation (defaults to {@link module:ol/easing~inAndOut}).\n * The function will be called for each frame with a number representing a\n * fraction of the animation's duration. The function should return a number\n * between 0 and 1 representing the progress toward the destination state.\n */\n\n\n/**\n * @typedef {Object} State\n * @property {module:ol/coordinate~Coordinate} center\n * @property {module:ol/proj/Projection} projection\n * @property {number} resolution\n * @property {number} rotation\n * @property {number} zoom\n */\n\n\n/**\n * Default min zoom level for the map view.\n * @type {number}\n */\nconst DEFAULT_MIN_ZOOM = 0;\n\n\n/**\n * @classdesc\n * A View object represents a simple 2D view of the map.\n *\n * This is the object to act upon to change the center, resolution,\n * and rotation of the map.\n *\n * ### The view states\n *\n * An View is determined by three states: `center`, `resolution`,\n * and `rotation`. Each state has a corresponding getter and setter, e.g.\n * `getCenter` and `setCenter` for the `center` state.\n *\n * An View has a `projection`. The projection determines the\n * coordinate system of the center, and its units determine the units of the\n * resolution (projection units per pixel). The default projection is\n * Spherical Mercator (EPSG:3857).\n *\n * ### The constraints\n *\n * `setCenter`, `setResolution` and `setRotation` can be used to change the\n * states of the view. Any value can be passed to the setters. And the value\n * that is passed to a setter will effectively be the value set in the view,\n * and returned by the corresponding getter.\n *\n * But a View object also has a *resolution constraint*, a\n * *rotation constraint* and a *center constraint*.\n *\n * As said above, no constraints are applied when the setters are used to set\n * new states for the view. Applying constraints is done explicitly through\n * the use of the `constrain*` functions (`constrainResolution` and\n * `constrainRotation` and `constrainCenter`).\n *\n * The main users of the constraints are the interactions and the\n * controls. For example, double-clicking on the map changes the view to\n * the \"next\" resolution. And releasing the fingers after pinch-zooming\n * snaps to the closest resolution (with an animation).\n *\n * The *resolution constraint* snaps to specific resolutions. It is\n * determined by the following options: `resolutions`, `maxResolution`,\n * `maxZoom`, and `zoomFactor`. If `resolutions` is set, the other three\n * options are ignored. See documentation for each option for more\n * information.\n *\n * The *rotation constraint* snaps to specific angles. It is determined\n * by the following options: `enableRotation` and `constrainRotation`.\n * By default the rotation value is snapped to zero when approaching the\n * horizontal.\n *\n * The *center constraint* is determined by the `extent` option. By\n * default the center is not constrained at all.\n *\n * @constructor\n * @extends {module:ol/Object}\n * @param {module:ol/View~ViewOptions=} opt_options View options.\n * @api\n */\nconst View = function(opt_options) {\n BaseObject.call(this);\n\n const options = assign({}, opt_options);\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.hints_ = [0, 0];\n\n /**\n * @private\n * @type {Array.<Array.<module:ol/View~Animation>>}\n */\n this.animations_ = [];\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.updateAnimationKey_;\n\n this.updateAnimations_ = this.updateAnimations_.bind(this);\n\n /**\n * @private\n * @const\n * @type {module:ol/proj/Projection}\n */\n this.projection_ = createProjection(options.projection, 'EPSG:3857');\n\n this.applyOptions_(options);\n};\n\ninherits(View, BaseObject);\n\n\n/**\n * Set up the view with the given options.\n * @param {module:ol/View~ViewOptions} options View options.\n */\nView.prototype.applyOptions_ = function(options) {\n\n /**\n * @type {Object.<string, *>}\n */\n const properties = {};\n properties[ViewProperty.CENTER] = options.center !== undefined ?\n options.center : null;\n\n const resolutionConstraintInfo = createResolutionConstraint(options);\n\n /**\n * @private\n * @type {number}\n */\n this.maxResolution_ = resolutionConstraintInfo.maxResolution;\n\n /**\n * @private\n * @type {number}\n */\n this.minResolution_ = resolutionConstraintInfo.minResolution;\n\n /**\n * @private\n * @type {number}\n */\n this.zoomFactor_ = resolutionConstraintInfo.zoomFactor;\n\n /**\n * @private\n * @type {Array.<number>|undefined}\n */\n this.resolutions_ = options.resolutions;\n\n /**\n * @private\n * @type {number}\n */\n this.minZoom_ = resolutionConstraintInfo.minZoom;\n\n const centerConstraint = createCenterConstraint(options);\n const resolutionConstraint = resolutionConstraintInfo.constraint;\n const rotationConstraint = createRotationConstraint(options);\n\n /**\n * @private\n * @type {module:ol/View~Constraints}\n */\n this.constraints_ = {\n center: centerConstraint,\n resolution: resolutionConstraint,\n rotation: rotationConstraint\n };\n\n if (options.resolution !== undefined) {\n properties[ViewProperty.RESOLUTION] = options.resolution;\n } else if (options.zoom !== undefined) {\n properties[ViewProperty.RESOLUTION] = this.constrainResolution(\n this.maxResolution_, options.zoom - this.minZoom_);\n\n if (this.resolutions_) { // in case map zoom is out of min/max zoom range\n properties[ViewProperty.RESOLUTION] = clamp(\n Number(this.getResolution() || properties[ViewProperty.RESOLUTION]),\n this.minResolution_, this.maxResolution_);\n }\n }\n properties[ViewProperty.ROTATION] = options.rotation !== undefined ? options.rotation : 0;\n this.setProperties(properties);\n\n /**\n * @private\n * @type {module:ol/View~ViewOptions}\n */\n this.options_ = options;\n\n};\n\n/**\n * Get an updated version of the view options used to construct the view. The\n * current resolution (or zoom), center, and rotation are applied to any stored\n * options. The provided options can be used to apply new min/max zoom or\n * resolution limits.\n * @param {module:ol/View~ViewOptions} newOptions New options to be applied.\n * @return {module:ol/View~ViewOptions} New options updated with the current view state.\n */\nView.prototype.getUpdatedOptions_ = function(newOptions) {\n const options = assign({}, this.options_);\n\n // preserve resolution (or zoom)\n if (options.resolution !== undefined) {\n options.resolution = this.getResolution();\n } else {\n options.zoom = this.getZoom();\n }\n\n // preserve center\n options.center = this.getCenter();\n\n // preserve rotation\n options.rotation = this.getRotation();\n\n return assign({}, options, newOptions);\n};\n\n\n/**\n * Animate the view. The view's center, zoom (or resolution), and rotation\n * can be animated for smooth transitions between view states. For example,\n * to animate the view to a new zoom level:\n *\n * view.animate({zoom: view.getZoom() + 1});\n *\n * By default, the animation lasts one second and uses in-and-out easing. You\n * can customize this behavior by including `duration` (in milliseconds) and\n * `easing` options (see {@link module:ol/easing}).\n *\n * To chain together multiple animations, call the method with multiple\n * animation objects. For example, to first zoom and then pan:\n *\n * view.animate({zoom: 10}, {center: [0, 0]});\n *\n * If you provide a function as the last argument to the animate method, it\n * will get called at the end of an animation series. The callback will be\n * called with `true` if the animation series completed on its own or `false`\n * if it was cancelled.\n *\n * Animations are cancelled by user interactions (e.g. dragging the map) or by\n * calling `view.setCenter()`, `view.setResolution()`, or `view.setRotation()`\n * (or another method that calls one of these).\n *\n * @param {...(module:ol/View~AnimationOptions|function(boolean))} var_args Animation\n * options. Multiple animations can be run in series by passing multiple\n * options objects. To run multiple animations in parallel, call the method\n * multiple times. An optional callback can be provided as a final\n * argument. The callback will be called with a boolean indicating whether\n * the animation completed without being cancelled.\n * @api\n */\nView.prototype.animate = function(var_args) {\n let animationCount = arguments.length;\n let callback;\n if (animationCount > 1 && typeof arguments[animationCount - 1] === 'function') {\n callback = arguments[animationCount - 1];\n --animationCount;\n }\n if (!this.isDef()) {\n // if view properties are not yet set, shortcut to the final state\n const state = arguments[animationCount - 1];\n if (state.center) {\n this.setCenter(state.center);\n }\n if (state.zoom !== undefined) {\n this.setZoom(state.zoom);\n }\n if (state.rotation !== undefined) {\n this.setRotation(state.rotation);\n }\n if (callback) {\n setTimeout(function() {\n callback(true);\n }, 0);\n }\n return;\n }\n let start = Date.now();\n let center = this.getCenter().slice();\n let resolution = this.getResolution();\n let rotation = this.getRotation();\n const series = [];\n for (let i = 0; i < animationCount; ++i) {\n const options = /** @type {module:ol/View~AnimationOptions} */ (arguments[i]);\n\n const animation = /** @type {module:ol/View~Animation} */ ({\n start: start,\n complete: false,\n anchor: options.anchor,\n duration: options.duration !== undefined ? options.duration : 1000,\n easing: options.easing || inAndOut\n });\n\n if (options.center) {\n animation.sourceCenter = center;\n animation.targetCenter = options.center;\n center = animation.targetCenter;\n }\n\n if (options.zoom !== undefined) {\n animation.sourceResolution = resolution;\n animation.targetResolution = this.constrainResolution(\n this.maxResolution_, options.zoom - this.minZoom_, 0);\n resolution = animation.targetResolution;\n } else if (options.resolution) {\n animation.sourceResolution = resolution;\n animation.targetResolution = options.resolution;\n resolution = animation.targetResolution;\n }\n\n if (options.rotation !== undefined) {\n animation.sourceRotation = rotation;\n const delta = modulo(options.rotation - rotation + Math.PI, 2 * Math.PI) - Math.PI;\n animation.targetRotation = rotation + delta;\n rotation = animation.targetRotation;\n }\n\n animation.callback = callback;\n\n // check if animation is a no-op\n if (isNoopAnimation(animation)) {\n animation.complete = true;\n // we still push it onto the series for callback handling\n } else {\n start += animation.duration;\n }\n series.push(animation);\n }\n this.animations_.push(series);\n this.setHint(ViewHint.ANIMATING, 1);\n this.updateAnimations_();\n};\n\n\n/**\n * Determine if the view is being animated.\n * @return {boolean} The view is being animated.\n * @api\n */\nView.prototype.getAnimating = function() {\n return this.hints_[ViewHint.ANIMATING] > 0;\n};\n\n\n/**\n * Determine if the user is interacting with the view, such as panning or zooming.\n * @return {boolean} The view is being interacted with.\n * @api\n */\nView.prototype.getInteracting = function() {\n return this.hints_[ViewHint.INTERACTING] > 0;\n};\n\n\n/**\n * Cancel any ongoing animations.\n * @api\n */\nView.prototype.cancelAnimations = function() {\n this.setHint(ViewHint.ANIMATING, -this.hints_[ViewHint.ANIMATING]);\n for (let i = 0, ii = this.animations_.length; i < ii; ++i) {\n const series = this.animations_[i];\n if (series[0].callback) {\n series[0].callback(false);\n }\n }\n this.animations_.length = 0;\n};\n\n/**\n * Update all animations.\n */\nView.prototype.updateAnimations_ = function() {\n if (this.updateAnimationKey_ !== undefined) {\n cancelAnimationFrame(this.updateAnimationKey_);\n this.updateAnimationKey_ = undefined;\n }\n if (!this.getAnimating()) {\n return;\n }\n const now = Date.now();\n let more = false;\n for (let i = this.animations_.length - 1; i >= 0; --i) {\n const series = this.animations_[i];\n let seriesComplete = true;\n for (let j = 0, jj = series.length; j < jj; ++j) {\n const animation = series[j];\n if (animation.complete) {\n continue;\n }\n const elapsed = now - animation.start;\n let fraction = animation.duration > 0 ? elapsed / animation.duration : 1;\n if (fraction >= 1) {\n animation.complete = true;\n fraction = 1;\n } else {\n seriesComplete = false;\n }\n const progress = animation.easing(fraction);\n if (animation.sourceCenter) {\n const x0 = animation.sourceCenter[0];\n const y0 = animation.sourceCenter[1];\n const x1 = animation.targetCenter[0];\n const y1 = animation.targetCenter[1];\n const x = x0 + progress * (x1 - x0);\n const y = y0 + progress * (y1 - y0);\n this.set(ViewProperty.CENTER, [x, y]);\n }\n if (animation.sourceResolution && animation.targetResolution) {\n const resolution = progress === 1 ?\n animation.targetResolution :\n animation.sourceResolution + progress * (animation.targetResolution - animation.sourceResolution);\n if (animation.anchor) {\n this.set(ViewProperty.CENTER,\n this.calculateCenterZoom(resolution, animation.anchor));\n }\n this.set(ViewProperty.RESOLUTION, resolution);\n }\n if (animation.sourceRotation !== undefined && animation.targetRotation !== undefined) {\n const rotation = progress === 1 ?\n modulo(animation.targetRotation + Math.PI, 2 * Math.PI) - Math.PI :\n animation.sourceRotation + progress * (animation.targetRotation - animation.sourceRotation);\n if (animation.anchor) {\n this.set(ViewProperty.CENTER,\n this.calculateCenterRotate(rotation, animation.anchor));\n }\n this.set(ViewProperty.ROTATION, rotation);\n }\n more = true;\n if (!animation.complete) {\n break;\n }\n }\n if (seriesComplete) {\n this.animations_[i] = null;\n this.setHint(ViewHint.ANIMATING, -1);\n const callback = series[0].callback;\n if (callback) {\n setTimeout(function() {\n callback(true);\n }, 0);\n }\n }\n }\n // prune completed series\n this.animations_ = this.animations_.filter(Boolean);\n if (more && this.updateAnimationKey_ === undefined) {\n this.updateAnimationKey_ = requestAnimationFrame(this.updateAnimations_);\n }\n};\n\n/**\n * @param {number} rotation Target rotation.\n * @param {module:ol/coordinate~Coordinate} anchor Rotation anchor.\n * @return {module:ol/coordinate~Coordinate|undefined} Center for rotation and anchor.\n */\nView.prototype.calculateCenterRotate = function(rotation, anchor) {\n let center;\n const currentCenter = this.getCenter();\n if (currentCenter !== undefined) {\n center = [currentCenter[0] - anchor[0], currentCenter[1] - anchor[1]];\n rotateCoordinate(center, rotation - this.getRotation());\n addCoordinate(center, anchor);\n }\n return center;\n};\n\n\n/**\n * @param {number} resolution Target resolution.\n * @param {module:ol/coordinate~Coordinate} anchor Zoom anchor.\n * @return {module:ol/coordinate~Coordinate|undefined} Center for resolution and anchor.\n */\nView.prototype.calculateCenterZoom = function(resolution, anchor) {\n let center;\n const currentCenter = this.getCenter();\n const currentResolution = this.getResolution();\n if (currentCenter !== undefined && currentResolution !== undefined) {\n const x = anchor[0] - resolution * (anchor[0] - currentCenter[0]) / currentResolution;\n const y = anchor[1] - resolution * (anchor[1] - currentCenter[1]) / currentResolution;\n center = [x, y];\n }\n return center;\n};\n\n\n/**\n * @private\n * @return {module:ol/size~Size} Viewport size or `[100, 100]` when no viewport is found.\n */\nView.prototype.getSizeFromViewport_ = function() {\n const size = [100, 100];\n const selector = '.ol-viewport[data-view=\"' + getUid(this) + '\"]';\n const element = document.querySelector(selector);\n if (element) {\n const metrics = getComputedStyle(element);\n size[0] = parseInt(metrics.width, 10);\n size[1] = parseInt(metrics.height, 10);\n }\n return size;\n};\n\n\n/**\n * Get the constrained center of this view.\n * @param {module:ol/coordinate~Coordinate|undefined} center Center.\n * @return {module:ol/coordinate~Coordinate|undefined} Constrained center.\n * @api\n */\nView.prototype.constrainCenter = function(center) {\n return this.constraints_.center(center);\n};\n\n\n/**\n * Get the constrained resolution of this view.\n * @param {number|undefined} resolution Resolution.\n * @param {number=} opt_delta Delta. Default is `0`.\n * @param {number=} opt_direction Direction. Default is `0`.\n * @return {number|undefined} Constrained resolution.\n * @api\n */\nView.prototype.constrainResolution = function(resolution, opt_delta, opt_direction) {\n const delta = opt_delta || 0;\n const direction = opt_direction || 0;\n return this.constraints_.resolution(resolution, delta, direction);\n};\n\n\n/**\n * Get the constrained rotation of this view.\n * @param {number|undefined} rotation Rotation.\n * @param {number=} opt_delta Delta. Default is `0`.\n * @return {number|undefined} Constrained rotation.\n * @api\n */\nView.prototype.constrainRotation = function(rotation, opt_delta) {\n const delta = opt_delta || 0;\n return this.constraints_.rotation(rotation, delta);\n};\n\n\n/**\n * Get the view center.\n * @return {module:ol/coordinate~Coordinate|undefined} The center of the view.\n * @observable\n * @api\n */\nView.prototype.getCenter = function() {\n return (\n /** @type {module:ol/coordinate~Coordinate|undefined} */ (this.get(ViewProperty.CENTER))\n );\n};\n\n\n/**\n * @return {module:ol/View~Constraints} Constraints.\n */\nView.prototype.getConstraints = function() {\n return this.constraints_;\n};\n\n\n/**\n * @param {Array.<number>=} opt_hints Destination array.\n * @return {Array.<number>} Hint.\n */\nView.prototype.getHints = function(opt_hints) {\n if (opt_hints !== undefined) {\n opt_hints[0] = this.hints_[0];\n opt_hints[1] = this.hints_[1];\n return opt_hints;\n } else {\n return this.hints_.slice();\n }\n};\n\n\n/**\n * Calculate the extent for the current view state and the passed size.\n * The size is the pixel dimensions of the box into which the calculated extent\n * should fit. In most cases you want to get the extent of the entire map,\n * that is `map.getSize()`.\n * @param {module:ol/size~Size=} opt_size Box pixel size. If not provided, the size of the\n * first map that uses this view will be used.\n * @return {module:ol/extent~Extent} Extent.\n * @api\n */\nView.prototype.calculateExtent = function(opt_size) {\n const size = opt_size || this.getSizeFromViewport_();\n const center = /** @type {!module:ol/coordinate~Coordinate} */ (this.getCenter());\n assert(center, 1); // The view center is not defined\n const resolution = /** @type {!number} */ (this.getResolution());\n assert(resolution !== undefined, 2); // The view resolution is not defined\n const rotation = /** @type {!number} */ (this.getRotation());\n assert(rotation !== undefined, 3); // The view rotation is not defined\n\n return getForViewAndSize(center, resolution, rotation, size);\n};\n\n\n/**\n * Get the maximum resolution of the view.\n * @return {number} The maximum resolution of the view.\n * @api\n */\nView.prototype.getMaxResolution = function() {\n return this.maxResolution_;\n};\n\n\n/**\n * Get the minimum resolution of the view.\n * @return {number} The minimum resolution of the view.\n * @api\n */\nView.prototype.getMinResolution = function() {\n return this.minResolution_;\n};\n\n\n/**\n * Get the maximum zoom level for the view.\n * @return {number} The maximum zoom level.\n * @api\n */\nView.prototype.getMaxZoom = function() {\n return /** @type {number} */ (this.getZoomForResolution(this.minResolution_));\n};\n\n\n/**\n * Set a new maximum zoom level for the view.\n * @param {number} zoom The maximum zoom level.\n * @api\n */\nView.prototype.setMaxZoom = function(zoom) {\n this.applyOptions_(this.getUpdatedOptions_({maxZoom: zoom}));\n};\n\n\n/**\n * Get the minimum zoom level for the view.\n * @return {number} The minimum zoom level.\n * @api\n */\nView.prototype.getMinZoom = function() {\n return /** @type {number} */ (this.getZoomForResolution(this.maxResolution_));\n};\n\n\n/**\n * Set a new minimum zoom level for the view.\n * @param {number} zoom The minimum zoom level.\n * @api\n */\nView.prototype.setMinZoom = function(zoom) {\n this.applyOptions_(this.getUpdatedOptions_({minZoom: zoom}));\n};\n\n\n/**\n * Get the view projection.\n * @return {module:ol/proj/Projection} The projection of the view.\n * @api\n */\nView.prototype.getProjection = function() {\n return this.projection_;\n};\n\n\n/**\n * Get the view resolution.\n * @return {number|undefined} The resolution of the view.\n * @observable\n * @api\n */\nView.prototype.getResolution = function() {\n return /** @type {number|undefined} */ (this.get(ViewProperty.RESOLUTION));\n};\n\n\n/**\n * Get the resolutions for the view. This returns the array of resolutions\n * passed to the constructor of the View, or undefined if none were given.\n * @return {Array.<number>|undefined} The resolutions of the view.\n * @api\n */\nView.prototype.getResolutions = function() {\n return this.resolutions_;\n};\n\n\n/**\n * Get the resolution for a provided extent (in map units) and size (in pixels).\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {module:ol/size~Size=} opt_size Box pixel size.\n * @return {number} The resolution at which the provided extent will render at\n * the given size.\n * @api\n */\nView.prototype.getResolutionForExtent = function(extent, opt_size) {\n const size = opt_size || this.getSizeFromViewport_();\n const xResolution = getWidth(extent) / size[0];\n const yResolution = getHeight(extent) / size[1];\n return Math.max(xResolution, yResolution);\n};\n\n\n/**\n * Return a function that returns a value between 0 and 1 for a\n * resolution. Exponential scaling is assumed.\n * @param {number=} opt_power Power.\n * @return {function(number): number} Resolution for value function.\n */\nView.prototype.getResolutionForValueFunction = function(opt_power) {\n const power = opt_power || 2;\n const maxResolution = this.maxResolution_;\n const minResolution = this.minResolution_;\n const max = Math.log(maxResolution / minResolution) / Math.log(power);\n return (\n /**\n * @param {number} value Value.\n * @return {number} Resolution.\n */\n function(value) {\n const resolution = maxResolution / Math.pow(power, value * max);\n return resolution;\n });\n};\n\n\n/**\n * Get the view rotation.\n * @return {number} The rotation of the view in radians.\n * @observable\n * @api\n */\nView.prototype.getRotation = function() {\n return /** @type {number} */ (this.get(ViewProperty.ROTATION));\n};\n\n\n/**\n * Return a function that returns a resolution for a value between\n * 0 and 1. Exponential scaling is assumed.\n * @param {number=} opt_power Power.\n * @return {function(number): number} Value for resolution function.\n */\nView.prototype.getValueForResolutionFunction = function(opt_power) {\n const power = opt_power || 2;\n const maxResolution = this.maxResolution_;\n const minResolution = this.minResolution_;\n const max = Math.log(maxResolution / minResolution) / Math.log(power);\n return (\n /**\n * @param {number} resolution Resolution.\n * @return {number} Value.\n */\n function(resolution) {\n const value = (Math.log(maxResolution / resolution) / Math.log(power)) / max;\n return value;\n });\n};\n\n\n/**\n * @return {module:ol/View~State} View state.\n */\nView.prototype.getState = function() {\n const center = /** @type {module:ol/coordinate~Coordinate} */ (this.getCenter());\n const projection = this.getProjection();\n const resolution = /** @type {number} */ (this.getResolution());\n const rotation = this.getRotation();\n return (\n /** @type {module:ol/View~State} */ ({\n center: center.slice(),\n projection: projection !== undefined ? projection : null,\n resolution: resolution,\n rotation: rotation,\n zoom: this.getZoom()\n })\n );\n};\n\n\n/**\n * Get the current zoom level. If you configured your view with a resolutions\n * array (this is rare), this method may return non-integer zoom levels (so\n * the zoom level is not safe to use as an index into a resolutions array).\n * @return {number|undefined} Zoom.\n * @api\n */\nView.prototype.getZoom = function() {\n let zoom;\n const resolution = this.getResolution();\n if (resolution !== undefined) {\n zoom = this.getZoomForResolution(resolution);\n }\n return zoom;\n};\n\n\n/**\n * Get the zoom level for a resolution.\n * @param {number} resolution The resolution.\n * @return {number|undefined} The zoom level for the provided resolution.\n * @api\n */\nView.prototype.getZoomForResolution = function(resolution) {\n let offset = this.minZoom_ || 0;\n let max, zoomFactor;\n if (this.resolutions_) {\n const nearest = linearFindNearest(this.resolutions_, resolution, 1);\n offset = nearest;\n max = this.resolutions_[nearest];\n if (nearest == this.resolutions_.length - 1) {\n zoomFactor = 2;\n } else {\n zoomFactor = max / this.resolutions_[nearest + 1];\n }\n } else {\n max = this.maxResolution_;\n zoomFactor = this.zoomFactor_;\n }\n return offset + Math.log(max / resolution) / Math.log(zoomFactor);\n};\n\n\n/**\n * Get the resolution for a zoom level.\n * @param {number} zoom Zoom level.\n * @return {number} The view resolution for the provided zoom level.\n * @api\n */\nView.prototype.getResolutionForZoom = function(zoom) {\n return /** @type {number} */ (this.constrainResolution(\n this.maxResolution_, zoom - this.minZoom_, 0));\n};\n\n\n/**\n * Fit the given geometry or extent based on the given map size and border.\n * The size is pixel dimensions of the box to fit the extent into.\n * In most cases you will want to use the map size, that is `map.getSize()`.\n * Takes care of the map angle.\n * @param {module:ol/geom/SimpleGeometry|module:ol/extent~Extent} geometryOrExtent The geometry or\n * extent to fit the view to.\n * @param {module:ol/View~FitOptions=} opt_options Options.\n * @api\n */\nView.prototype.fit = function(geometryOrExtent, opt_options) {\n const options = opt_options || {};\n let size = options.size;\n if (!size) {\n size = this.getSizeFromViewport_();\n }\n /** @type {module:ol/geom/SimpleGeometry} */\n let geometry;\n if (!(geometryOrExtent instanceof SimpleGeometry)) {\n assert(Array.isArray(geometryOrExtent),\n 24); // Invalid extent or geometry provided as `geometry`\n assert(!isEmpty(geometryOrExtent),\n 25); // Cannot fit empty extent provided as `geometry`\n geometry = polygonFromExtent(geometryOrExtent);\n } else if (geometryOrExtent.getType() === GeometryType.CIRCLE) {\n geometryOrExtent = geometryOrExtent.getExtent();\n geometry = polygonFromExtent(geometryOrExtent);\n geometry.rotate(this.getRotation(), getCenter(geometryOrExtent));\n } else {\n geometry = geometryOrExtent;\n }\n\n const padding = options.padding !== undefined ? options.padding : [0, 0, 0, 0];\n const constrainResolution = options.constrainResolution !== undefined ?\n options.constrainResolution : true;\n const nearest = options.nearest !== undefined ? options.nearest : false;\n let minResolution;\n if (options.minResolution !== undefined) {\n minResolution = options.minResolution;\n } else if (options.maxZoom !== undefined) {\n minResolution = this.constrainResolution(\n this.maxResolution_, options.maxZoom - this.minZoom_, 0);\n } else {\n minResolution = 0;\n }\n const coords = geometry.getFlatCoordinates();\n\n // calculate rotated extent\n const rotation = this.getRotation();\n const cosAngle = Math.cos(-rotation);\n let sinAngle = Math.sin(-rotation);\n let minRotX = +Infinity;\n let minRotY = +Infinity;\n let maxRotX = -Infinity;\n let maxRotY = -Infinity;\n const stride = geometry.getStride();\n for (let i = 0, ii = coords.length; i < ii; i += stride) {\n const rotX = coords[i] * cosAngle - coords[i + 1] * sinAngle;\n const rotY = coords[i] * sinAngle + coords[i + 1] * cosAngle;\n minRotX = Math.min(minRotX, rotX);\n minRotY = Math.min(minRotY, rotY);\n maxRotX = Math.max(maxRotX, rotX);\n maxRotY = Math.max(maxRotY, rotY);\n }\n\n // calculate resolution\n let resolution = this.getResolutionForExtent(\n [minRotX, minRotY, maxRotX, maxRotY],\n [size[0] - padding[1] - padding[3], size[1] - padding[0] - padding[2]]);\n resolution = isNaN(resolution) ? minResolution :\n Math.max(resolution, minResolution);\n if (constrainResolution) {\n let constrainedResolution = this.constrainResolution(resolution, 0, 0);\n if (!nearest && constrainedResolution < resolution) {\n constrainedResolution = this.constrainResolution(\n constrainedResolution, -1, 0);\n }\n resolution = constrainedResolution;\n }\n\n // calculate center\n sinAngle = -sinAngle; // go back to original rotation\n let centerRotX = (minRotX + maxRotX) / 2;\n let centerRotY = (minRotY + maxRotY) / 2;\n centerRotX += (padding[1] - padding[3]) / 2 * resolution;\n centerRotY += (padding[0] - padding[2]) / 2 * resolution;\n const centerX = centerRotX * cosAngle - centerRotY * sinAngle;\n const centerY = centerRotY * cosAngle + centerRotX * sinAngle;\n const center = [centerX, centerY];\n const callback = options.callback ? options.callback : UNDEFINED;\n\n if (options.duration !== undefined) {\n this.animate({\n resolution: resolution,\n center: center,\n duration: options.duration,\n easing: options.easing\n }, callback);\n } else {\n this.setResolution(resolution);\n this.setCenter(center);\n setTimeout(callback.bind(undefined, true), 0);\n }\n};\n\n\n/**\n * Center on coordinate and view position.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {module:ol/size~Size} size Box pixel size.\n * @param {module:ol~Pixel} position Position on the view to center on.\n * @api\n */\nView.prototype.centerOn = function(coordinate, size, position) {\n // calculate rotated position\n const rotation = this.getRotation();\n const cosAngle = Math.cos(-rotation);\n let sinAngle = Math.sin(-rotation);\n let rotX = coordinate[0] * cosAngle - coordinate[1] * sinAngle;\n let rotY = coordinate[1] * cosAngle + coordinate[0] * sinAngle;\n const resolution = this.getResolution();\n rotX += (size[0] / 2 - position[0]) * resolution;\n rotY += (position[1] - size[1] / 2) * resolution;\n\n // go back to original angle\n sinAngle = -sinAngle; // go back to original rotation\n const centerX = rotX * cosAngle - rotY * sinAngle;\n const centerY = rotY * cosAngle + rotX * sinAngle;\n\n this.setCenter([centerX, centerY]);\n};\n\n\n/**\n * @return {boolean} Is defined.\n */\nView.prototype.isDef = function() {\n return !!this.getCenter() && this.getResolution() !== undefined;\n};\n\n\n/**\n * Rotate the view around a given coordinate.\n * @param {number} rotation New rotation value for the view.\n * @param {module:ol/coordinate~Coordinate=} opt_anchor The rotation center.\n * @api\n */\nView.prototype.rotate = function(rotation, opt_anchor) {\n if (opt_anchor !== undefined) {\n const center = this.calculateCenterRotate(rotation, opt_anchor);\n this.setCenter(center);\n }\n this.setRotation(rotation);\n};\n\n\n/**\n * Set the center of the current view.\n * @param {module:ol/coordinate~Coordinate|undefined} center The center of the view.\n * @observable\n * @api\n */\nView.prototype.setCenter = function(center) {\n this.set(ViewProperty.CENTER, center);\n if (this.getAnimating()) {\n this.cancelAnimations();\n }\n};\n\n\n/**\n * @param {module:ol/ViewHint} hint Hint.\n * @param {number} delta Delta.\n * @return {number} New value.\n */\nView.prototype.setHint = function(hint, delta) {\n this.hints_[hint] += delta;\n this.changed();\n return this.hints_[hint];\n};\n\n\n/**\n * Set the resolution for this view.\n * @param {number|undefined} resolution The resolution of the view.\n * @observable\n * @api\n */\nView.prototype.setResolution = function(resolution) {\n this.set(ViewProperty.RESOLUTION, resolution);\n if (this.getAnimating()) {\n this.cancelAnimations();\n }\n};\n\n\n/**\n * Set the rotation for this view.\n * @param {number} rotation The rotation of the view in radians.\n * @observable\n * @api\n */\nView.prototype.setRotation = function(rotation) {\n this.set(ViewProperty.ROTATION, rotation);\n if (this.getAnimating()) {\n this.cancelAnimations();\n }\n};\n\n\n/**\n * Zoom to a specific zoom level.\n * @param {number} zoom Zoom level.\n * @api\n */\nView.prototype.setZoom = function(zoom) {\n this.setResolution(this.getResolutionForZoom(zoom));\n};\n\n\n/**\n * @param {module:ol/View~ViewOptions} options View options.\n * @return {module:ol/centerconstraint~Type} The constraint.\n */\nexport function createCenterConstraint(options) {\n if (options.extent !== undefined) {\n return createExtent(options.extent);\n } else {\n return centerNone;\n }\n}\n\n\n/**\n * @param {module:ol/View~ViewOptions} options View options.\n * @return {{constraint: module:ol/resolutionconstraint~Type, maxResolution: number,\n * minResolution: number, minZoom: number, zoomFactor: number}} The constraint.\n */\nexport function createResolutionConstraint(options) {\n let resolutionConstraint;\n let maxResolution;\n let minResolution;\n\n // TODO: move these to be ol constants\n // see https://github.com/openlayers/openlayers/issues/2076\n const defaultMaxZoom = 28;\n const defaultZoomFactor = 2;\n\n let minZoom = options.minZoom !== undefined ?\n options.minZoom : DEFAULT_MIN_ZOOM;\n\n let maxZoom = options.maxZoom !== undefined ?\n options.maxZoom : defaultMaxZoom;\n\n const zoomFactor = options.zoomFactor !== undefined ?\n options.zoomFactor : defaultZoomFactor;\n\n if (options.resolutions !== undefined) {\n const resolutions = options.resolutions;\n maxResolution = resolutions[minZoom];\n minResolution = resolutions[maxZoom] !== undefined ?\n resolutions[maxZoom] : resolutions[resolutions.length - 1];\n resolutionConstraint = createSnapToResolutions(\n resolutions);\n } else {\n // calculate the default min and max resolution\n const projection = createProjection(options.projection, 'EPSG:3857');\n const extent = projection.getExtent();\n const size = !extent ?\n // use an extent that can fit the whole world if need be\n 360 * METERS_PER_UNIT[Units.DEGREES] /\n projection.getMetersPerUnit() :\n Math.max(getWidth(extent), getHeight(extent));\n\n const defaultMaxResolution = size / DEFAULT_TILE_SIZE / Math.pow(\n defaultZoomFactor, DEFAULT_MIN_ZOOM);\n\n const defaultMinResolution = defaultMaxResolution / Math.pow(\n defaultZoomFactor, defaultMaxZoom - DEFAULT_MIN_ZOOM);\n\n // user provided maxResolution takes precedence\n maxResolution = options.maxResolution;\n if (maxResolution !== undefined) {\n minZoom = 0;\n } else {\n maxResolution = defaultMaxResolution / Math.pow(zoomFactor, minZoom);\n }\n\n // user provided minResolution takes precedence\n minResolution = options.minResolution;\n if (minResolution === undefined) {\n if (options.maxZoom !== undefined) {\n if (options.maxResolution !== undefined) {\n minResolution = maxResolution / Math.pow(zoomFactor, maxZoom);\n } else {\n minResolution = defaultMaxResolution / Math.pow(zoomFactor, maxZoom);\n }\n } else {\n minResolution = defaultMinResolution;\n }\n }\n\n // given discrete zoom levels, minResolution may be different than provided\n maxZoom = minZoom + Math.floor(\n Math.log(maxResolution / minResolution) / Math.log(zoomFactor));\n minResolution = maxResolution / Math.pow(zoomFactor, maxZoom - minZoom);\n\n resolutionConstraint = createSnapToPower(\n zoomFactor, maxResolution, maxZoom - minZoom);\n }\n return {constraint: resolutionConstraint, maxResolution: maxResolution,\n minResolution: minResolution, minZoom: minZoom, zoomFactor: zoomFactor};\n}\n\n\n/**\n * @param {module:ol/View~ViewOptions} options View options.\n * @return {module:ol/rotationconstraint~Type} Rotation constraint.\n */\nexport function createRotationConstraint(options) {\n const enableRotation = options.enableRotation !== undefined ?\n options.enableRotation : true;\n if (enableRotation) {\n const constrainRotation = options.constrainRotation;\n if (constrainRotation === undefined || constrainRotation === true) {\n return createSnapToZero();\n } else if (constrainRotation === false) {\n return rotationNone;\n } else if (typeof constrainRotation === 'number') {\n return createSnapToN(constrainRotation);\n } else {\n return rotationNone;\n }\n } else {\n return disable;\n }\n}\n\n\n/**\n * Determine if an animation involves no view change.\n * @param {module:ol/View~Animation} animation The animation.\n * @return {boolean} The animation involves no view change.\n */\nexport function isNoopAnimation(animation) {\n if (animation.sourceCenter && animation.targetCenter) {\n if (!coordinatesEqual(animation.sourceCenter, animation.targetCenter)) {\n return false;\n }\n }\n if (animation.sourceResolution !== animation.targetResolution) {\n return false;\n }\n if (animation.sourceRotation !== animation.targetRotation) {\n return false;\n }\n return true;\n}\n\nexport default View;\n","/**\n * @module ol/resolutionconstraint\n */\nimport {linearFindNearest} from './array.js';\nimport {clamp} from './math.js';\n\n\n/**\n * @typedef {function((number|undefined), number, number): (number|undefined)} Type\n */\n\n\n/**\n * @param {Array.<number>} resolutions Resolutions.\n * @return {module:ol/resolutionconstraint~Type} Zoom function.\n */\nexport function createSnapToResolutions(resolutions) {\n return (\n /**\n * @param {number|undefined} resolution Resolution.\n * @param {number} delta Delta.\n * @param {number} direction Direction.\n * @return {number|undefined} Resolution.\n */\n function(resolution, delta, direction) {\n if (resolution !== undefined) {\n let z = linearFindNearest(resolutions, resolution, direction);\n z = clamp(z + delta, 0, resolutions.length - 1);\n const index = Math.floor(z);\n if (z != index && index < resolutions.length - 1) {\n const power = resolutions[index] / resolutions[index + 1];\n return resolutions[index] / Math.pow(power, z - index);\n } else {\n return resolutions[index];\n }\n } else {\n return undefined;\n }\n }\n );\n}\n\n\n/**\n * @param {number} power Power.\n * @param {number} maxResolution Maximum resolution.\n * @param {number=} opt_maxLevel Maximum level.\n * @return {module:ol/resolutionconstraint~Type} Zoom function.\n */\nexport function createSnapToPower(power, maxResolution, opt_maxLevel) {\n return (\n /**\n * @param {number|undefined} resolution Resolution.\n * @param {number} delta Delta.\n * @param {number} direction Direction.\n * @return {number|undefined} Resolution.\n */\n function(resolution, delta, direction) {\n if (resolution !== undefined) {\n const offset = -direction / 2 + 0.5;\n const oldLevel = Math.floor(\n Math.log(maxResolution / resolution) / Math.log(power) + offset);\n let newLevel = Math.max(oldLevel + delta, 0);\n if (opt_maxLevel !== undefined) {\n newLevel = Math.min(newLevel, opt_maxLevel);\n }\n return maxResolution / Math.pow(power, newLevel);\n } else {\n return undefined;\n }\n });\n}\n","/**\n * @module ol/layer/Property\n */\n\n/**\n * @enum {string}\n */\nexport default {\n OPACITY: 'opacity',\n VISIBLE: 'visible',\n EXTENT: 'extent',\n Z_INDEX: 'zIndex',\n MAX_RESOLUTION: 'maxResolution',\n MIN_RESOLUTION: 'minResolution',\n SOURCE: 'source'\n};\n","/**\n * @module ol/layer/Base\n */\nimport {inherits} from '../util.js';\nimport BaseObject from '../Object.js';\nimport LayerProperty from '../layer/Property.js';\nimport {clamp} from '../math.js';\nimport {assign} from '../obj.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {module:ol/extent~Extent} [extent] The bounding extent for layer rendering. The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex=0] The z-index for layer rendering. At rendering time, the layers\n * will be ordered, first by Z-index and then by position.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Note that with {@link module:ol/layer/Base} and all its subclasses, any property set in\n * the options is set as a {@link module:ol/Object} property on the layer object, so\n * is observable, and has get/set accessors.\n *\n * @constructor\n * @abstract\n * @extends {module:ol/Object}\n * @param {module:ol/layer/Base~Options} options Layer options.\n * @api\n */\nconst BaseLayer = function(options) {\n\n BaseObject.call(this);\n\n /**\n * @type {Object.<string, *>}\n */\n const properties = assign({}, options);\n properties[LayerProperty.OPACITY] =\n options.opacity !== undefined ? options.opacity : 1;\n properties[LayerProperty.VISIBLE] =\n options.visible !== undefined ? options.visible : true;\n properties[LayerProperty.Z_INDEX] =\n options.zIndex !== undefined ? options.zIndex : 0;\n properties[LayerProperty.MAX_RESOLUTION] =\n options.maxResolution !== undefined ? options.maxResolution : Infinity;\n properties[LayerProperty.MIN_RESOLUTION] =\n options.minResolution !== undefined ? options.minResolution : 0;\n\n this.setProperties(properties);\n\n /**\n * @type {module:ol/layer/Layer~State}\n * @private\n */\n this.state_ = /** @type {module:ol/layer/Layer~State} */ ({\n layer: /** @type {module:ol/layer/Layer} */ (this),\n managed: true\n });\n\n /**\n * The layer type.\n * @type {module:ol/LayerType}\n * @protected;\n */\n this.type;\n\n};\n\ninherits(BaseLayer, BaseObject);\n\n\n/**\n * Get the layer type (used when creating a layer renderer).\n * @return {module:ol/LayerType} The layer type.\n */\nBaseLayer.prototype.getType = function() {\n return this.type;\n};\n\n\n/**\n * @return {module:ol/layer/Layer~State} Layer state.\n */\nBaseLayer.prototype.getLayerState = function() {\n this.state_.opacity = clamp(this.getOpacity(), 0, 1);\n this.state_.sourceState = this.getSourceState();\n this.state_.visible = this.getVisible();\n this.state_.extent = this.getExtent();\n this.state_.zIndex = this.getZIndex();\n this.state_.maxResolution = this.getMaxResolution();\n this.state_.minResolution = Math.max(this.getMinResolution(), 0);\n\n return this.state_;\n};\n\n\n/**\n * @abstract\n * @param {Array.<module:ol/layer/Layer>=} opt_array Array of layers (to be\n * modified in place).\n * @return {Array.<module:ol/layer/Layer>} Array of layers.\n */\nBaseLayer.prototype.getLayersArray = function(opt_array) {};\n\n\n/**\n * @abstract\n * @param {Array.<module:ol/layer/Layer~State>=} opt_states Optional list of layer\n * states (to be modified in place).\n * @return {Array.<module:ol/layer/Layer~State>} List of layer states.\n */\nBaseLayer.prototype.getLayerStatesArray = function(opt_states) {};\n\n\n/**\n * Return the {@link module:ol/extent~Extent extent} of the layer or `undefined` if it\n * will be visible regardless of extent.\n * @return {module:ol/extent~Extent|undefined} The layer extent.\n * @observable\n * @api\n */\nBaseLayer.prototype.getExtent = function() {\n return (\n /** @type {module:ol/extent~Extent|undefined} */ (this.get(LayerProperty.EXTENT))\n );\n};\n\n\n/**\n * Return the maximum resolution of the layer.\n * @return {number} The maximum resolution of the layer.\n * @observable\n * @api\n */\nBaseLayer.prototype.getMaxResolution = function() {\n return /** @type {number} */ (this.get(LayerProperty.MAX_RESOLUTION));\n};\n\n\n/**\n * Return the minimum resolution of the layer.\n * @return {number} The minimum resolution of the layer.\n * @observable\n * @api\n */\nBaseLayer.prototype.getMinResolution = function() {\n return /** @type {number} */ (this.get(LayerProperty.MIN_RESOLUTION));\n};\n\n\n/**\n * Return the opacity of the layer (between 0 and 1).\n * @return {number} The opacity of the layer.\n * @observable\n * @api\n */\nBaseLayer.prototype.getOpacity = function() {\n return /** @type {number} */ (this.get(LayerProperty.OPACITY));\n};\n\n\n/**\n * @abstract\n * @return {module:ol/source/State} Source state.\n */\nBaseLayer.prototype.getSourceState = function() {};\n\n\n/**\n * Return the visibility of the layer (`true` or `false`).\n * @return {boolean} The visibility of the layer.\n * @observable\n * @api\n */\nBaseLayer.prototype.getVisible = function() {\n return /** @type {boolean} */ (this.get(LayerProperty.VISIBLE));\n};\n\n\n/**\n * Return the Z-index of the layer, which is used to order layers before\n * rendering. The default Z-index is 0.\n * @return {number} The Z-index of the layer.\n * @observable\n * @api\n */\nBaseLayer.prototype.getZIndex = function() {\n return /** @type {number} */ (this.get(LayerProperty.Z_INDEX));\n};\n\n\n/**\n * Set the extent at which the layer is visible. If `undefined`, the layer\n * will be visible at all extents.\n * @param {module:ol/extent~Extent|undefined} extent The extent of the layer.\n * @observable\n * @api\n */\nBaseLayer.prototype.setExtent = function(extent) {\n this.set(LayerProperty.EXTENT, extent);\n};\n\n\n/**\n * Set the maximum resolution at which the layer is visible.\n * @param {number} maxResolution The maximum resolution of the layer.\n * @observable\n * @api\n */\nBaseLayer.prototype.setMaxResolution = function(maxResolution) {\n this.set(LayerProperty.MAX_RESOLUTION, maxResolution);\n};\n\n\n/**\n * Set the minimum resolution at which the layer is visible.\n * @param {number} minResolution The minimum resolution of the layer.\n * @observable\n * @api\n */\nBaseLayer.prototype.setMinResolution = function(minResolution) {\n this.set(LayerProperty.MIN_RESOLUTION, minResolution);\n};\n\n\n/**\n * Set the opacity of the layer, allowed values range from 0 to 1.\n * @param {number} opacity The opacity of the layer.\n * @observable\n * @api\n */\nBaseLayer.prototype.setOpacity = function(opacity) {\n this.set(LayerProperty.OPACITY, opacity);\n};\n\n\n/**\n * Set the visibility of the layer (`true` or `false`).\n * @param {boolean} visible The visibility of the layer.\n * @observable\n * @api\n */\nBaseLayer.prototype.setVisible = function(visible) {\n this.set(LayerProperty.VISIBLE, visible);\n};\n\n\n/**\n * Set Z-index of the layer, which is used to order layers before rendering.\n * The default Z-index is 0.\n * @param {number} zindex The z-index of the layer.\n * @observable\n * @api\n */\nBaseLayer.prototype.setZIndex = function(zindex) {\n this.set(LayerProperty.Z_INDEX, zindex);\n};\nexport default BaseLayer;\n","/**\n * @module ol/source/State\n */\n\n/**\n * State of the source, one of 'undefined', 'loading', 'ready' or 'error'.\n * @enum {string}\n */\nexport default {\n UNDEFINED: 'undefined',\n LOADING: 'loading',\n READY: 'ready',\n ERROR: 'error'\n};\n","/**\n * @module ol/layer/Group\n */\nimport {getUid, inherits} from '../util.js';\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport {getChangeEventType} from '../Object.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport {assert} from '../asserts.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getIntersection} from '../extent.js';\nimport BaseLayer from '../layer/Base.js';\nimport {assign, clear} from '../obj.js';\nimport SourceState from '../source/State.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {module:ol/extent~Extent} [extent] The bounding extent for layer rendering. The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex=0] The z-index for layer rendering. At rendering time, the layers\n * will be ordered, first by Z-index and then by position.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {(Array.<module:ol/layer/Base>|module:ol/Collection.<module:ol/layer/Base>)} [layers] Child layers.\n */\n\n\n/**\n * @enum {string}\n * @private\n */\nconst Property = {\n LAYERS: 'layers'\n};\n\n\n/**\n * @classdesc\n * A {@link module:ol/Collection~Collection} of layers that are handled together.\n *\n * A generic `change` event is triggered when the group/Collection changes.\n *\n * @constructor\n * @extends {module:ol/layer/Base}\n * @param {module:ol/layer/Group~Options=} opt_options Layer options.\n * @api\n */\nconst LayerGroup = function(opt_options) {\n\n const options = opt_options || {};\n const baseOptions = /** @type {module:ol/layer/Group~Options} */ (assign({}, options));\n delete baseOptions.layers;\n\n let layers = options.layers;\n\n BaseLayer.call(this, baseOptions);\n\n /**\n * @private\n * @type {Array.<module:ol/events~EventsKey>}\n */\n this.layersListenerKeys_ = [];\n\n /**\n * @private\n * @type {Object.<string, Array.<module:ol/events~EventsKey>>}\n */\n this.listenerKeys_ = {};\n\n listen(this,\n getChangeEventType(Property.LAYERS),\n this.handleLayersChanged_, this);\n\n if (layers) {\n if (Array.isArray(layers)) {\n layers = new Collection(layers.slice(), {unique: true});\n } else {\n assert(layers instanceof Collection,\n 43); // Expected `layers` to be an array or a `Collection`\n layers = layers;\n }\n } else {\n layers = new Collection(undefined, {unique: true});\n }\n\n this.setLayers(layers);\n\n};\n\ninherits(LayerGroup, BaseLayer);\n\n\n/**\n * @private\n */\nLayerGroup.prototype.handleLayerChange_ = function() {\n this.changed();\n};\n\n\n/**\n * @param {module:ol/events/Event} event Event.\n * @private\n */\nLayerGroup.prototype.handleLayersChanged_ = function(event) {\n this.layersListenerKeys_.forEach(unlistenByKey);\n this.layersListenerKeys_.length = 0;\n\n const layers = this.getLayers();\n this.layersListenerKeys_.push(\n listen(layers, CollectionEventType.ADD, this.handleLayersAdd_, this),\n listen(layers, CollectionEventType.REMOVE, this.handleLayersRemove_, this)\n );\n\n for (const id in this.listenerKeys_) {\n this.listenerKeys_[id].forEach(unlistenByKey);\n }\n clear(this.listenerKeys_);\n\n const layersArray = layers.getArray();\n for (let i = 0, ii = layersArray.length; i < ii; i++) {\n const layer = layersArray[i];\n this.listenerKeys_[getUid(layer).toString()] = [\n listen(layer, ObjectEventType.PROPERTYCHANGE, this.handleLayerChange_, this),\n listen(layer, EventType.CHANGE, this.handleLayerChange_, this)\n ];\n }\n\n this.changed();\n};\n\n\n/**\n * @param {module:ol/Collection~CollectionEvent} collectionEvent CollectionEvent.\n * @private\n */\nLayerGroup.prototype.handleLayersAdd_ = function(collectionEvent) {\n const layer = /** @type {module:ol/layer/Base} */ (collectionEvent.element);\n const key = getUid(layer).toString();\n this.listenerKeys_[key] = [\n listen(layer, ObjectEventType.PROPERTYCHANGE, this.handleLayerChange_, this),\n listen(layer, EventType.CHANGE, this.handleLayerChange_, this)\n ];\n this.changed();\n};\n\n\n/**\n * @param {module:ol/Collection~CollectionEvent} collectionEvent CollectionEvent.\n * @private\n */\nLayerGroup.prototype.handleLayersRemove_ = function(collectionEvent) {\n const layer = /** @type {module:ol/layer/Base} */ (collectionEvent.element);\n const key = getUid(layer).toString();\n this.listenerKeys_[key].forEach(unlistenByKey);\n delete this.listenerKeys_[key];\n this.changed();\n};\n\n\n/**\n * Returns the {@link module:ol/Collection collection} of {@link module:ol/layer/Layer~Layer layers}\n * in this group.\n * @return {!module:ol/Collection.<module:ol/layer/Base>} Collection of\n * {@link module:ol/layer/Base layers} that are part of this group.\n * @observable\n * @api\n */\nLayerGroup.prototype.getLayers = function() {\n return (\n /** @type {!module:ol/Collection.<module:ol/layer/Base>} */ (this.get(Property.LAYERS))\n );\n};\n\n\n/**\n * Set the {@link module:ol/Collection collection} of {@link module:ol/layer/Layer~Layer layers}\n * in this group.\n * @param {!module:ol/Collection.<module:ol/layer/Base>} layers Collection of\n * {@link module:ol/layer/Base layers} that are part of this group.\n * @observable\n * @api\n */\nLayerGroup.prototype.setLayers = function(layers) {\n this.set(Property.LAYERS, layers);\n};\n\n\n/**\n * @inheritDoc\n */\nLayerGroup.prototype.getLayersArray = function(opt_array) {\n const array = opt_array !== undefined ? opt_array : [];\n this.getLayers().forEach(function(layer) {\n layer.getLayersArray(array);\n });\n return array;\n};\n\n\n/**\n * @inheritDoc\n */\nLayerGroup.prototype.getLayerStatesArray = function(opt_states) {\n const states = opt_states !== undefined ? opt_states : [];\n\n const pos = states.length;\n\n this.getLayers().forEach(function(layer) {\n layer.getLayerStatesArray(states);\n });\n\n const ownLayerState = this.getLayerState();\n for (let i = pos, ii = states.length; i < ii; i++) {\n const layerState = states[i];\n layerState.opacity *= ownLayerState.opacity;\n layerState.visible = layerState.visible && ownLayerState.visible;\n layerState.maxResolution = Math.min(\n layerState.maxResolution, ownLayerState.maxResolution);\n layerState.minResolution = Math.max(\n layerState.minResolution, ownLayerState.minResolution);\n if (ownLayerState.extent !== undefined) {\n if (layerState.extent !== undefined) {\n layerState.extent = getIntersection(layerState.extent, ownLayerState.extent);\n } else {\n layerState.extent = ownLayerState.extent;\n }\n }\n }\n\n return states;\n};\n\n\n/**\n * @inheritDoc\n */\nLayerGroup.prototype.getSourceState = function() {\n return SourceState.READY;\n};\n\nexport default LayerGroup;\n","/**\n * @module ol/size\n */\n\n\n/**\n * An array of numbers representing a size: `[width, height]`.\n * @typedef {Array.<number>} Size\n * @api\n */\n\n\n/**\n * Returns a buffered size.\n * @param {module:ol/size~Size} size Size.\n * @param {number} num The amount by which to buffer.\n * @param {module:ol/size~Size=} opt_size Optional reusable size array.\n * @return {module:ol/size~Size} The buffered size.\n */\nexport function buffer(size, num, opt_size) {\n if (opt_size === undefined) {\n opt_size = [0, 0];\n }\n opt_size[0] = size[0] + 2 * num;\n opt_size[1] = size[1] + 2 * num;\n return opt_size;\n}\n\n\n/**\n * Determines if a size has a positive area.\n * @param {module:ol/size~Size} size The size to test.\n * @return {boolean} The size has a positive area.\n */\nexport function hasArea(size) {\n return size[0] > 0 && size[1] > 0;\n}\n\n\n/**\n * Returns a size scaled by a ratio. The result will be an array of integers.\n * @param {module:ol/size~Size} size Size.\n * @param {number} ratio Ratio.\n * @param {module:ol/size~Size=} opt_size Optional reusable size array.\n * @return {module:ol/size~Size} The scaled size.\n */\nexport function scale(size, ratio, opt_size) {\n if (opt_size === undefined) {\n opt_size = [0, 0];\n }\n opt_size[0] = (size[0] * ratio + 0.5) | 0;\n opt_size[1] = (size[1] * ratio + 0.5) | 0;\n return opt_size;\n}\n\n\n/**\n * Returns an `module:ol/size~Size` array for the passed in number (meaning: square) or\n * `module:ol/size~Size` array.\n * (meaning: non-square),\n * @param {number|module:ol/size~Size} size Width and height.\n * @param {module:ol/size~Size=} opt_size Optional reusable size array.\n * @return {module:ol/size~Size} Size.\n * @api\n */\nexport function toSize(size, opt_size) {\n if (Array.isArray(size)) {\n return size;\n } else {\n if (opt_size === undefined) {\n opt_size = [size, size];\n } else {\n opt_size[0] = opt_size[1] = /** @type {number} */ (size);\n }\n return opt_size;\n }\n}\n","/**\n * @module ol/PluggableMap\n */\nimport {getUid, inherits} from './util.js';\nimport Collection from './Collection.js';\nimport CollectionEventType from './CollectionEventType.js';\nimport MapBrowserEvent from './MapBrowserEvent.js';\nimport MapBrowserEventHandler from './MapBrowserEventHandler.js';\nimport MapBrowserEventType from './MapBrowserEventType.js';\nimport MapEvent from './MapEvent.js';\nimport MapEventType from './MapEventType.js';\nimport MapProperty from './MapProperty.js';\nimport BaseObject, {getChangeEventType} from './Object.js';\nimport ObjectEventType from './ObjectEventType.js';\nimport TileQueue from './TileQueue.js';\nimport View from './View.js';\nimport ViewHint from './ViewHint.js';\nimport {assert} from './asserts.js';\nimport {removeNode} from './dom.js';\nimport {listen, unlistenByKey, unlisten} from './events.js';\nimport {stopPropagation} from './events/Event.js';\nimport EventType from './events/EventType.js';\nimport {createEmpty, clone, createOrUpdateEmpty, equals, getForViewAndSize, isEmpty} from './extent.js';\nimport {TRUE} from './functions.js';\nimport {DEVICE_PIXEL_RATIO, TOUCH} from './has.js';\nimport LayerGroup from './layer/Group.js';\nimport {hasArea} from './size.js';\nimport {DROP} from './structs/PriorityQueue.js';\nimport {create as createTransform, apply as applyTransform} from './transform.js';\n\n\n/**\n * State of the current frame. Only `pixelRatio`, `time` and `viewState` should\n * be used in applications.\n * @typedef {Object} FrameState\n * @property {number} pixelRatio The pixel ratio of the frame.\n * @property {number} time The time when rendering of the frame was requested.\n * @property {module:ol/View~State} viewState The state of the current view.\n * @property {boolean} animate\n * @property {module:ol/transform~Transform} coordinateToPixelTransform\n * @property {null|module:ol/extent~Extent} extent\n * @property {module:ol/coordinate~Coordinate} focus\n * @property {number} index\n * @property {Object.<number, module:ol/layer/Layer~State>} layerStates\n * @property {Array.<module:ol/layer/Layer~State>} layerStatesArray\n * @property {module:ol/transform~Transform} pixelToCoordinateTransform\n * @property {Array.<module:ol/PluggableMap~PostRenderFunction>} postRenderFunctions\n * @property {module:ol/size~Size} size\n * @property {!Object.<string, boolean>} skippedFeatureUids\n * @property {module:ol/TileQueue} tileQueue\n * @property {Object.<string, Object.<string, module:ol/TileRange>>} usedTiles\n * @property {Array.<number>} viewHints\n * @property {!Object.<string, Object.<string, boolean>>} wantedTiles\n */\n\n\n/**\n * @typedef {function(module:ol/PluggableMap, ?module:ol/PluggableMap~FrameState): boolean} PostRenderFunction\n */\n\n\n/**\n * @typedef {Object} AtPixelOptions\n * @property {((function(module:ol/layer/Layer): boolean)|undefined)} layerFilter Layer filter\n * function. The filter function will receive one argument, the\n * {@link module:ol/layer/Layer layer-candidate} and it should return a boolean value.\n * Only layers which are visible and for which this function returns `true`\n * will be tested for features. By default, all visible layers will be tested.\n * @property {number} [hitTolerance=0] Hit-detection tolerance in pixels. Pixels\n * inside the radius around the given position will be checked for features. This only\n * works for the canvas renderer and not for WebGL.\n */\n\n\n/**\n * @typedef {Object} MapOptionsInternal\n * @property {module:ol/Collection.<module:ol/control/Control>} [controls]\n * @property {module:ol/Collection.<module:ol/interaction/Interaction>} [interactions]\n * @property {Element|Document} keyboardEventTarget\n * @property {module:ol/Collection.<module:ol/Overlay>} overlays\n * @property {Object.<string, *>} values\n */\n\n\n/**\n * Object literal with config options for the map.\n * @typedef {Object} MapOptions\n * @property {module:ol/Collection.<module:ol/control/Control>|Array.<module:ol/control/Control>} [controls]\n * Controls initially added to the map. If not specified,\n * {@link module:ol/control/util~defaults} is used.\n * @property {number} [pixelRatio=window.devicePixelRatio] The ratio between\n * physical pixels and device-independent pixels (dips) on the device.\n * @property {module:ol/Collection.<module:ol/interaction/Interaction>|Array.<module:ol/interaction/Interaction>} [interactions]\n * Interactions that are initially added to the map. If not specified,\n * {@link module:ol/interaction~defaults} is used.\n * @property {Element|Document|string} [keyboardEventTarget] The element to\n * listen to keyboard events on. This determines when the `KeyboardPan` and\n * `KeyboardZoom` interactions trigger. For example, if this option is set to\n * `document` the keyboard interactions will always trigger. If this option is\n * not specified, the element the library listens to keyboard events on is the\n * map target (i.e. the user-provided div for the map). If this is not\n * `document`, the target element needs to be focused for key events to be\n * emitted, requiring that the target element has a `tabindex` attribute.\n * @property {Array.<module:ol/layer/Base>|module:ol/Collection.<module:ol/layer/Base>} [layers]\n * Layers. If this is not defined, a map with no layers will be rendered. Note\n * that layers are rendered in the order supplied, so if you want, for example,\n * a vector layer to appear on top of a tile layer, it must come after the tile\n * layer.\n * @property {number} [maxTilesLoading=16] Maximum number tiles to load\n * simultaneously.\n * @property {boolean} [loadTilesWhileAnimating=false] When set to `true`, tiles\n * will be loaded during animations. This may improve the user experience, but\n * can also make animations stutter on devices with slow memory.\n * @property {boolean} [loadTilesWhileInteracting=false] When set to `true`,\n * tiles will be loaded while interacting with the map. This may improve the\n * user experience, but can also make map panning and zooming choppy on devices\n * with slow memory.\n * @property {number} [moveTolerance=1] The minimum distance in pixels the\n * cursor must move to be detected as a map move event instead of a click.\n * Increasing this value can make it easier to click on the map.\n * @property {module:ol/Collection.<module:ol/Overlay>|Array.<module:ol/Overlay>} [overlays]\n * Overlays initially added to the map. By default, no overlays are added.\n * @property {Element|string} [target] The container for the map, either the\n * element itself or the `id` of the element. If not specified at construction\n * time, {@link module:ol/Map~Map#setTarget} must be called for the map to be\n * rendered.\n * @property {module:ol/View} [view] The map's view. No layer sources will be\n * fetched unless this is specified at construction time or through\n * {@link module:ol/Map~Map#setView}.\n */\n\n\n/**\n * @constructor\n * @extends {module:ol/Object}\n * @param {module:ol/PluggableMap~MapOptions} options Map options.\n * @fires module:ol/MapBrowserEvent~MapBrowserEvent\n * @fires module:ol/MapEvent~MapEvent\n * @fires module:ol/render/Event~RenderEvent#postcompose\n * @fires module:ol/render/Event~RenderEvent#precompose\n * @api\n */\nconst PluggableMap = function(options) {\n\n BaseObject.call(this);\n\n const optionsInternal = createOptionsInternal(options);\n\n /**\n * @type {number}\n * @private\n */\n this.maxTilesLoading_ = options.maxTilesLoading !== undefined ? options.maxTilesLoading : 16;\n\n /**\n * @type {boolean}\n * @private\n */\n this.loadTilesWhileAnimating_ =\n options.loadTilesWhileAnimating !== undefined ?\n options.loadTilesWhileAnimating : false;\n\n /**\n * @type {boolean}\n * @private\n */\n this.loadTilesWhileInteracting_ =\n options.loadTilesWhileInteracting !== undefined ?\n options.loadTilesWhileInteracting : false;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ = options.pixelRatio !== undefined ?\n options.pixelRatio : DEVICE_PIXEL_RATIO;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.animationDelayKey_;\n\n /**\n * @private\n */\n this.animationDelay_ = function() {\n this.animationDelayKey_ = undefined;\n this.renderFrame_.call(this, Date.now());\n }.bind(this);\n\n /**\n * @private\n * @type {module:ol/transform~Transform}\n */\n this.coordinateToPixelTransform_ = createTransform();\n\n /**\n * @private\n * @type {module:ol/transform~Transform}\n */\n this.pixelToCoordinateTransform_ = createTransform();\n\n /**\n * @private\n * @type {number}\n */\n this.frameIndex_ = 0;\n\n /**\n * @private\n * @type {?module:ol/PluggableMap~FrameState}\n */\n this.frameState_ = null;\n\n /**\n * The extent at the previous 'moveend' event.\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.previousExtent_ = null;\n\n /**\n * @private\n * @type {?module:ol/events~EventsKey}\n */\n this.viewPropertyListenerKey_ = null;\n\n /**\n * @private\n * @type {?module:ol/events~EventsKey}\n */\n this.viewChangeListenerKey_ = null;\n\n /**\n * @private\n * @type {Array.<module:ol/events~EventsKey>}\n */\n this.layerGroupPropertyListenerKeys_ = null;\n\n /**\n * @private\n * @type {Element}\n */\n this.viewport_ = document.createElement('DIV');\n this.viewport_.className = 'ol-viewport' + (TOUCH ? ' ol-touch' : '');\n this.viewport_.style.position = 'relative';\n this.viewport_.style.overflow = 'hidden';\n this.viewport_.style.width = '100%';\n this.viewport_.style.height = '100%';\n // prevent page zoom on IE >= 10 browsers\n this.viewport_.style.msTouchAction = 'none';\n this.viewport_.style.touchAction = 'none';\n\n /**\n * @private\n * @type {!Element}\n */\n this.overlayContainer_ = document.createElement('DIV');\n this.overlayContainer_.className = 'ol-overlaycontainer';\n this.viewport_.appendChild(this.overlayContainer_);\n\n /**\n * @private\n * @type {!Element}\n */\n this.overlayContainerStopEvent_ = document.createElement('DIV');\n this.overlayContainerStopEvent_.className = 'ol-overlaycontainer-stopevent';\n const overlayEvents = [\n EventType.CLICK,\n EventType.DBLCLICK,\n EventType.MOUSEDOWN,\n EventType.TOUCHSTART,\n EventType.MSPOINTERDOWN,\n MapBrowserEventType.POINTERDOWN,\n EventType.MOUSEWHEEL,\n EventType.WHEEL\n ];\n for (let i = 0, ii = overlayEvents.length; i < ii; ++i) {\n listen(this.overlayContainerStopEvent_, overlayEvents[i], stopPropagation);\n }\n this.viewport_.appendChild(this.overlayContainerStopEvent_);\n\n /**\n * @private\n * @type {module:ol/MapBrowserEventHandler}\n */\n this.mapBrowserEventHandler_ = new MapBrowserEventHandler(this, options.moveTolerance);\n for (const key in MapBrowserEventType) {\n listen(this.mapBrowserEventHandler_, MapBrowserEventType[key],\n this.handleMapBrowserEvent, this);\n }\n\n /**\n * @private\n * @type {Element|Document}\n */\n this.keyboardEventTarget_ = optionsInternal.keyboardEventTarget;\n\n /**\n * @private\n * @type {Array.<module:ol/events~EventsKey>}\n */\n this.keyHandlerKeys_ = null;\n\n listen(this.viewport_, EventType.CONTEXTMENU, this.handleBrowserEvent, this);\n listen(this.viewport_, EventType.WHEEL, this.handleBrowserEvent, this);\n listen(this.viewport_, EventType.MOUSEWHEEL, this.handleBrowserEvent, this);\n\n /**\n * @type {module:ol/Collection.<module:ol/control/Control>}\n * @protected\n */\n this.controls = optionsInternal.controls || new Collection();\n\n /**\n * @type {module:ol/Collection.<module:ol/interaction/Interaction>}\n * @protected\n */\n this.interactions = optionsInternal.interactions || new Collection();\n\n /**\n * @type {module:ol/Collection.<module:ol/Overlay>}\n * @private\n */\n this.overlays_ = optionsInternal.overlays;\n\n /**\n * A lookup of overlays by id.\n * @private\n * @type {Object.<string, module:ol/Overlay>}\n */\n this.overlayIdIndex_ = {};\n\n /**\n * @type {module:ol/renderer/Map}\n * @private\n */\n this.renderer_ = this.createRenderer();\n\n /**\n * @type {function(Event)|undefined}\n * @private\n */\n this.handleResize_;\n\n /**\n * @private\n * @type {module:ol/coordinate~Coordinate}\n */\n this.focus_ = null;\n\n /**\n * @private\n * @type {!Array.<module:ol/PluggableMap~PostRenderFunction>}\n */\n this.postRenderFunctions_ = [];\n\n /**\n * @private\n * @type {module:ol/TileQueue}\n */\n this.tileQueue_ = new TileQueue(\n this.getTilePriority.bind(this),\n this.handleTileChange_.bind(this));\n\n /**\n * Uids of features to skip at rendering time.\n * @type {Object.<string, boolean>}\n * @private\n */\n this.skippedFeatureUids_ = {};\n\n listen(\n this, getChangeEventType(MapProperty.LAYERGROUP),\n this.handleLayerGroupChanged_, this);\n listen(this, getChangeEventType(MapProperty.VIEW),\n this.handleViewChanged_, this);\n listen(this, getChangeEventType(MapProperty.SIZE),\n this.handleSizeChanged_, this);\n listen(this, getChangeEventType(MapProperty.TARGET),\n this.handleTargetChanged_, this);\n\n // setProperties will trigger the rendering of the map if the map\n // is \"defined\" already.\n this.setProperties(optionsInternal.values);\n\n this.controls.forEach(\n /**\n * @param {module:ol/control/Control} control Control.\n * @this {module:ol/PluggableMap}\n */\n (function(control) {\n control.setMap(this);\n }).bind(this));\n\n listen(this.controls, CollectionEventType.ADD,\n /**\n * @param {module:ol/Collection~CollectionEvent} event CollectionEvent.\n */\n function(event) {\n event.element.setMap(this);\n }, this);\n\n listen(this.controls, CollectionEventType.REMOVE,\n /**\n * @param {module:ol/Collection~CollectionEvent} event CollectionEvent.\n */\n function(event) {\n event.element.setMap(null);\n }, this);\n\n this.interactions.forEach(\n /**\n * @param {module:ol/interaction/Interaction} interaction Interaction.\n * @this {module:ol/PluggableMap}\n */\n (function(interaction) {\n interaction.setMap(this);\n }).bind(this));\n\n listen(this.interactions, CollectionEventType.ADD,\n /**\n * @param {module:ol/Collection~CollectionEvent} event CollectionEvent.\n */\n function(event) {\n event.element.setMap(this);\n }, this);\n\n listen(this.interactions, CollectionEventType.REMOVE,\n /**\n * @param {module:ol/Collection~CollectionEvent} event CollectionEvent.\n */\n function(event) {\n event.element.setMap(null);\n }, this);\n\n this.overlays_.forEach(this.addOverlayInternal_.bind(this));\n\n listen(this.overlays_, CollectionEventType.ADD,\n /**\n * @param {module:ol/Collection~CollectionEvent} event CollectionEvent.\n */\n function(event) {\n this.addOverlayInternal_(/** @type {module:ol/Overlay} */ (event.element));\n }, this);\n\n listen(this.overlays_, CollectionEventType.REMOVE,\n /**\n * @param {module:ol/Collection~CollectionEvent} event CollectionEvent.\n */\n function(event) {\n const overlay = /** @type {module:ol/Overlay} */ (event.element);\n const id = overlay.getId();\n if (id !== undefined) {\n delete this.overlayIdIndex_[id.toString()];\n }\n event.element.setMap(null);\n }, this);\n\n};\n\ninherits(PluggableMap, BaseObject);\n\n\nPluggableMap.prototype.createRenderer = function() {\n throw new Error('Use a map type that has a createRenderer method');\n};\n\n\n/**\n * Add the given control to the map.\n * @param {module:ol/control/Control} control Control.\n * @api\n */\nPluggableMap.prototype.addControl = function(control) {\n this.getControls().push(control);\n};\n\n\n/**\n * Add the given interaction to the map.\n * @param {module:ol/interaction/Interaction} interaction Interaction to add.\n * @api\n */\nPluggableMap.prototype.addInteraction = function(interaction) {\n this.getInteractions().push(interaction);\n};\n\n\n/**\n * Adds the given layer to the top of this map. If you want to add a layer\n * elsewhere in the stack, use `getLayers()` and the methods available on\n * {@link module:ol/Collection~Collection}.\n * @param {module:ol/layer/Base} layer Layer.\n * @api\n */\nPluggableMap.prototype.addLayer = function(layer) {\n const layers = this.getLayerGroup().getLayers();\n layers.push(layer);\n};\n\n\n/**\n * Add the given overlay to the map.\n * @param {module:ol/Overlay} overlay Overlay.\n * @api\n */\nPluggableMap.prototype.addOverlay = function(overlay) {\n this.getOverlays().push(overlay);\n};\n\n\n/**\n * This deals with map's overlay collection changes.\n * @param {module:ol/Overlay} overlay Overlay.\n * @private\n */\nPluggableMap.prototype.addOverlayInternal_ = function(overlay) {\n const id = overlay.getId();\n if (id !== undefined) {\n this.overlayIdIndex_[id.toString()] = overlay;\n }\n overlay.setMap(this);\n};\n\n\n/**\n *\n * @inheritDoc\n */\nPluggableMap.prototype.disposeInternal = function() {\n this.mapBrowserEventHandler_.dispose();\n unlisten(this.viewport_, EventType.CONTEXTMENU, this.handleBrowserEvent, this);\n unlisten(this.viewport_, EventType.WHEEL, this.handleBrowserEvent, this);\n unlisten(this.viewport_, EventType.MOUSEWHEEL, this.handleBrowserEvent, this);\n if (this.handleResize_ !== undefined) {\n removeEventListener(EventType.RESIZE, this.handleResize_, false);\n this.handleResize_ = undefined;\n }\n if (this.animationDelayKey_) {\n cancelAnimationFrame(this.animationDelayKey_);\n this.animationDelayKey_ = undefined;\n }\n this.setTarget(null);\n BaseObject.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * Detect features that intersect a pixel on the viewport, and execute a\n * callback with each intersecting feature. Layers included in the detection can\n * be configured through the `layerFilter` option in `opt_options`.\n * @param {module:ol~Pixel} pixel Pixel.\n * @param {function(this: S, (module:ol/Feature|module:ol/render/Feature),\n * module:ol/layer/Layer): T} callback Feature callback. The callback will be\n * called with two arguments. The first argument is one\n * {@link module:ol/Feature feature} or\n * {@link module:ol/render/Feature render feature} at the pixel, the second is\n * the {@link module:ol/layer/Layer layer} of the feature and will be null for\n * unmanaged layers. To stop detection, callback functions can return a\n * truthy value.\n * @param {module:ol/PluggableMap~AtPixelOptions=} opt_options Optional options.\n * @return {T|undefined} Callback result, i.e. the return value of last\n * callback execution, or the first truthy callback return value.\n * @template S,T\n * @api\n */\nPluggableMap.prototype.forEachFeatureAtPixel = function(pixel, callback, opt_options) {\n if (!this.frameState_) {\n return;\n }\n const coordinate = this.getCoordinateFromPixel(pixel);\n opt_options = opt_options !== undefined ? opt_options : {};\n const hitTolerance = opt_options.hitTolerance !== undefined ?\n opt_options.hitTolerance * this.frameState_.pixelRatio : 0;\n const layerFilter = opt_options.layerFilter !== undefined ?\n opt_options.layerFilter : TRUE;\n return this.renderer_.forEachFeatureAtCoordinate(\n coordinate, this.frameState_, hitTolerance, callback, null,\n layerFilter, null);\n};\n\n\n/**\n * Get all features that intersect a pixel on the viewport.\n * @param {module:ol~Pixel} pixel Pixel.\n * @param {module:ol/PluggableMap~AtPixelOptions=} opt_options Optional options.\n * @return {Array.<module:ol/Feature|module:ol/render/Feature>} The detected features or\n * `null` if none were found.\n * @api\n */\nPluggableMap.prototype.getFeaturesAtPixel = function(pixel, opt_options) {\n let features = null;\n this.forEachFeatureAtPixel(pixel, function(feature) {\n if (!features) {\n features = [];\n }\n features.push(feature);\n }, opt_options);\n return features;\n};\n\n/**\n * Detect layers that have a color value at a pixel on the viewport, and\n * execute a callback with each matching layer. Layers included in the\n * detection can be configured through `opt_layerFilter`.\n * @param {module:ol~Pixel} pixel Pixel.\n * @param {function(this: S, module:ol/layer/Layer, (Uint8ClampedArray|Uint8Array)): T} callback\n * Layer callback. This callback will receive two arguments: first is the\n * {@link module:ol/layer/Layer layer}, second argument is an array representing\n * [R, G, B, A] pixel values (0 - 255) and will be `null` for layer types\n * that do not currently support this argument. To stop detection, callback\n * functions can return a truthy value.\n * @param {module:ol/PluggableMap~AtPixelOptions=} opt_options Configuration options.\n * @return {T|undefined} Callback result, i.e. the return value of last\n * callback execution, or the first truthy callback return value.\n * @template S,T\n * @api\n */\nPluggableMap.prototype.forEachLayerAtPixel = function(pixel, callback, opt_options) {\n if (!this.frameState_) {\n return;\n }\n const options = opt_options || {};\n const hitTolerance = options.hitTolerance !== undefined ?\n opt_options.hitTolerance * this.frameState_.pixelRatio : 0;\n const layerFilter = options.layerFilter || TRUE;\n return this.renderer_.forEachLayerAtPixel(\n pixel, this.frameState_, hitTolerance, callback, null, layerFilter, null);\n};\n\n\n/**\n * Detect if features intersect a pixel on the viewport. Layers included in the\n * detection can be configured through `opt_layerFilter`.\n * @param {module:ol~Pixel} pixel Pixel.\n * @param {module:ol/PluggableMap~AtPixelOptions=} opt_options Optional options.\n * @return {boolean} Is there a feature at the given pixel?\n * @template U\n * @api\n */\nPluggableMap.prototype.hasFeatureAtPixel = function(pixel, opt_options) {\n if (!this.frameState_) {\n return false;\n }\n const coordinate = this.getCoordinateFromPixel(pixel);\n opt_options = opt_options !== undefined ? opt_options : {};\n const layerFilter = opt_options.layerFilter !== undefined ? opt_options.layerFilter : TRUE;\n const hitTolerance = opt_options.hitTolerance !== undefined ?\n opt_options.hitTolerance * this.frameState_.pixelRatio : 0;\n return this.renderer_.hasFeatureAtCoordinate(\n coordinate, this.frameState_, hitTolerance, layerFilter, null);\n};\n\n\n/**\n * Returns the coordinate in view projection for a browser event.\n * @param {Event} event Event.\n * @return {module:ol/coordinate~Coordinate} Coordinate.\n * @api\n */\nPluggableMap.prototype.getEventCoordinate = function(event) {\n return this.getCoordinateFromPixel(this.getEventPixel(event));\n};\n\n\n/**\n * Returns the map pixel position for a browser event relative to the viewport.\n * @param {Event} event Event.\n * @return {module:ol~Pixel} Pixel.\n * @api\n */\nPluggableMap.prototype.getEventPixel = function(event) {\n const viewportPosition = this.viewport_.getBoundingClientRect();\n const eventPosition = event.changedTouches ? event.changedTouches[0] : event;\n return [\n eventPosition.clientX - viewportPosition.left,\n eventPosition.clientY - viewportPosition.top\n ];\n};\n\n\n/**\n * Get the target in which this map is rendered.\n * Note that this returns what is entered as an option or in setTarget:\n * if that was an element, it returns an element; if a string, it returns that.\n * @return {Element|string|undefined} The Element or id of the Element that the\n * map is rendered in.\n * @observable\n * @api\n */\nPluggableMap.prototype.getTarget = function() {\n return /** @type {Element|string|undefined} */ (this.get(MapProperty.TARGET));\n};\n\n\n/**\n * Get the DOM element into which this map is rendered. In contrast to\n * `getTarget` this method always return an `Element`, or `null` if the\n * map has no target.\n * @return {Element} The element that the map is rendered in.\n * @api\n */\nPluggableMap.prototype.getTargetElement = function() {\n const target = this.getTarget();\n if (target !== undefined) {\n return typeof target === 'string' ? document.getElementById(target) : target;\n } else {\n return null;\n }\n};\n\n\n/**\n * Get the coordinate for a given pixel. This returns a coordinate in the\n * map view projection.\n * @param {module:ol~Pixel} pixel Pixel position in the map viewport.\n * @return {module:ol/coordinate~Coordinate} The coordinate for the pixel position.\n * @api\n */\nPluggableMap.prototype.getCoordinateFromPixel = function(pixel) {\n const frameState = this.frameState_;\n if (!frameState) {\n return null;\n } else {\n return applyTransform(frameState.pixelToCoordinateTransform, pixel.slice());\n }\n};\n\n\n/**\n * Get the map controls. Modifying this collection changes the controls\n * associated with the map.\n * @return {module:ol/Collection.<module:ol/control/Control>} Controls.\n * @api\n */\nPluggableMap.prototype.getControls = function() {\n return this.controls;\n};\n\n\n/**\n * Get the map overlays. Modifying this collection changes the overlays\n * associated with the map.\n * @return {module:ol/Collection.<module:ol/Overlay>} Overlays.\n * @api\n */\nPluggableMap.prototype.getOverlays = function() {\n return this.overlays_;\n};\n\n\n/**\n * Get an overlay by its identifier (the value returned by overlay.getId()).\n * Note that the index treats string and numeric identifiers as the same. So\n * `map.getOverlayById(2)` will return an overlay with id `'2'` or `2`.\n * @param {string|number} id Overlay identifier.\n * @return {module:ol/Overlay} Overlay.\n * @api\n */\nPluggableMap.prototype.getOverlayById = function(id) {\n const overlay = this.overlayIdIndex_[id.toString()];\n return overlay !== undefined ? overlay : null;\n};\n\n\n/**\n * Get the map interactions. Modifying this collection changes the interactions\n * associated with the map.\n *\n * Interactions are used for e.g. pan, zoom and rotate.\n * @return {module:ol/Collection.<module:ol/interaction/Interaction>} Interactions.\n * @api\n */\nPluggableMap.prototype.getInteractions = function() {\n return this.interactions;\n};\n\n\n/**\n * Get the layergroup associated with this map.\n * @return {module:ol/layer/Group} A layer group containing the layers in this map.\n * @observable\n * @api\n */\nPluggableMap.prototype.getLayerGroup = function() {\n return (\n /** @type {module:ol/layer/Group} */ (this.get(MapProperty.LAYERGROUP))\n );\n};\n\n\n/**\n * Get the collection of layers associated with this map.\n * @return {!module:ol/Collection.<module:ol/layer/Base>} Layers.\n * @api\n */\nPluggableMap.prototype.getLayers = function() {\n const layers = this.getLayerGroup().getLayers();\n return layers;\n};\n\n\n/**\n * Get the pixel for a coordinate. This takes a coordinate in the map view\n * projection and returns the corresponding pixel.\n * @param {module:ol/coordinate~Coordinate} coordinate A map coordinate.\n * @return {module:ol~Pixel} A pixel position in the map viewport.\n * @api\n */\nPluggableMap.prototype.getPixelFromCoordinate = function(coordinate) {\n const frameState = this.frameState_;\n if (!frameState) {\n return null;\n } else {\n return applyTransform(frameState.coordinateToPixelTransform, coordinate.slice(0, 2));\n }\n};\n\n\n/**\n * Get the map renderer.\n * @return {module:ol/renderer/Map} Renderer\n */\nPluggableMap.prototype.getRenderer = function() {\n return this.renderer_;\n};\n\n\n/**\n * Get the size of this map.\n * @return {module:ol/size~Size|undefined} The size in pixels of the map in the DOM.\n * @observable\n * @api\n */\nPluggableMap.prototype.getSize = function() {\n return (\n /** @type {module:ol/size~Size|undefined} */ (this.get(MapProperty.SIZE))\n );\n};\n\n\n/**\n * Get the view associated with this map. A view manages properties such as\n * center and resolution.\n * @return {module:ol/View} The view that controls this map.\n * @observable\n * @api\n */\nPluggableMap.prototype.getView = function() {\n return (\n /** @type {module:ol/View} */ (this.get(MapProperty.VIEW))\n );\n};\n\n\n/**\n * Get the element that serves as the map viewport.\n * @return {Element} Viewport.\n * @api\n */\nPluggableMap.prototype.getViewport = function() {\n return this.viewport_;\n};\n\n\n/**\n * Get the element that serves as the container for overlays. Elements added to\n * this container will let mousedown and touchstart events through to the map,\n * so clicks and gestures on an overlay will trigger {@link module:ol/MapBrowserEvent~MapBrowserEvent}\n * events.\n * @return {!Element} The map's overlay container.\n */\nPluggableMap.prototype.getOverlayContainer = function() {\n return this.overlayContainer_;\n};\n\n\n/**\n * Get the element that serves as a container for overlays that don't allow\n * event propagation. Elements added to this container won't let mousedown and\n * touchstart events through to the map, so clicks and gestures on an overlay\n * don't trigger any {@link module:ol/MapBrowserEvent~MapBrowserEvent}.\n * @return {!Element} The map's overlay container that stops events.\n */\nPluggableMap.prototype.getOverlayContainerStopEvent = function() {\n return this.overlayContainerStopEvent_;\n};\n\n\n/**\n * @param {module:ol/Tile} tile Tile.\n * @param {string} tileSourceKey Tile source key.\n * @param {module:ol/coordinate~Coordinate} tileCenter Tile center.\n * @param {number} tileResolution Tile resolution.\n * @return {number} Tile priority.\n */\nPluggableMap.prototype.getTilePriority = function(tile, tileSourceKey, tileCenter, tileResolution) {\n // Filter out tiles at higher zoom levels than the current zoom level, or that\n // are outside the visible extent.\n const frameState = this.frameState_;\n if (!frameState || !(tileSourceKey in frameState.wantedTiles)) {\n return DROP;\n }\n if (!frameState.wantedTiles[tileSourceKey][tile.getKey()]) {\n return DROP;\n }\n // Prioritize the highest zoom level tiles closest to the focus.\n // Tiles at higher zoom levels are prioritized using Math.log(tileResolution).\n // Within a zoom level, tiles are prioritized by the distance in pixels\n // between the center of the tile and the focus. The factor of 65536 means\n // that the prioritization should behave as desired for tiles up to\n // 65536 * Math.log(2) = 45426 pixels from the focus.\n const deltaX = tileCenter[0] - frameState.focus[0];\n const deltaY = tileCenter[1] - frameState.focus[1];\n return 65536 * Math.log(tileResolution) +\n Math.sqrt(deltaX * deltaX + deltaY * deltaY) / tileResolution;\n};\n\n\n/**\n * @param {Event} browserEvent Browser event.\n * @param {string=} opt_type Type.\n */\nPluggableMap.prototype.handleBrowserEvent = function(browserEvent, opt_type) {\n const type = opt_type || browserEvent.type;\n const mapBrowserEvent = new MapBrowserEvent(type, this, browserEvent);\n this.handleMapBrowserEvent(mapBrowserEvent);\n};\n\n\n/**\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent The event to handle.\n */\nPluggableMap.prototype.handleMapBrowserEvent = function(mapBrowserEvent) {\n if (!this.frameState_) {\n // With no view defined, we cannot translate pixels into geographical\n // coordinates so interactions cannot be used.\n return;\n }\n this.focus_ = mapBrowserEvent.coordinate;\n mapBrowserEvent.frameState = this.frameState_;\n const interactionsArray = this.getInteractions().getArray();\n if (this.dispatchEvent(mapBrowserEvent) !== false) {\n for (let i = interactionsArray.length - 1; i >= 0; i--) {\n const interaction = interactionsArray[i];\n if (!interaction.getActive()) {\n continue;\n }\n const cont = interaction.handleEvent(mapBrowserEvent);\n if (!cont) {\n break;\n }\n }\n }\n};\n\n\n/**\n * @protected\n */\nPluggableMap.prototype.handlePostRender = function() {\n\n const frameState = this.frameState_;\n\n // Manage the tile queue\n // Image loads are expensive and a limited resource, so try to use them\n // efficiently:\n // * When the view is static we allow a large number of parallel tile loads\n // to complete the frame as quickly as possible.\n // * When animating or interacting, image loads can cause janks, so we reduce\n // the maximum number of loads per frame and limit the number of parallel\n // tile loads to remain reactive to view changes and to reduce the chance of\n // loading tiles that will quickly disappear from view.\n const tileQueue = this.tileQueue_;\n if (!tileQueue.isEmpty()) {\n let maxTotalLoading = this.maxTilesLoading_;\n let maxNewLoads = maxTotalLoading;\n if (frameState) {\n const hints = frameState.viewHints;\n if (hints[ViewHint.ANIMATING]) {\n maxTotalLoading = this.loadTilesWhileAnimating_ ? 8 : 0;\n maxNewLoads = 2;\n }\n if (hints[ViewHint.INTERACTING]) {\n maxTotalLoading = this.loadTilesWhileInteracting_ ? 8 : 0;\n maxNewLoads = 2;\n }\n }\n if (tileQueue.getTilesLoading() < maxTotalLoading) {\n tileQueue.reprioritize(); // FIXME only call if view has changed\n tileQueue.loadMoreTiles(maxTotalLoading, maxNewLoads);\n }\n }\n\n const postRenderFunctions = this.postRenderFunctions_;\n for (let i = 0, ii = postRenderFunctions.length; i < ii; ++i) {\n postRenderFunctions[i](this, frameState);\n }\n postRenderFunctions.length = 0;\n};\n\n\n/**\n * @private\n */\nPluggableMap.prototype.handleSizeChanged_ = function() {\n this.render();\n};\n\n\n/**\n * @private\n */\nPluggableMap.prototype.handleTargetChanged_ = function() {\n // target may be undefined, null, a string or an Element.\n // If it's a string we convert it to an Element before proceeding.\n // If it's not now an Element we remove the viewport from the DOM.\n // If it's an Element we append the viewport element to it.\n\n let targetElement;\n if (this.getTarget()) {\n targetElement = this.getTargetElement();\n }\n\n if (this.keyHandlerKeys_) {\n for (let i = 0, ii = this.keyHandlerKeys_.length; i < ii; ++i) {\n unlistenByKey(this.keyHandlerKeys_[i]);\n }\n this.keyHandlerKeys_ = null;\n }\n\n if (!targetElement) {\n this.renderer_.removeLayerRenderers();\n removeNode(this.viewport_);\n if (this.handleResize_ !== undefined) {\n removeEventListener(EventType.RESIZE, this.handleResize_, false);\n this.handleResize_ = undefined;\n }\n } else {\n targetElement.appendChild(this.viewport_);\n\n const keyboardEventTarget = !this.keyboardEventTarget_ ?\n targetElement : this.keyboardEventTarget_;\n this.keyHandlerKeys_ = [\n listen(keyboardEventTarget, EventType.KEYDOWN, this.handleBrowserEvent, this),\n listen(keyboardEventTarget, EventType.KEYPRESS, this.handleBrowserEvent, this)\n ];\n\n if (!this.handleResize_) {\n this.handleResize_ = this.updateSize.bind(this);\n addEventListener(EventType.RESIZE, this.handleResize_, false);\n }\n }\n\n this.updateSize();\n // updateSize calls setSize, so no need to call this.render\n // ourselves here.\n};\n\n\n/**\n * @private\n */\nPluggableMap.prototype.handleTileChange_ = function() {\n this.render();\n};\n\n\n/**\n * @private\n */\nPluggableMap.prototype.handleViewPropertyChanged_ = function() {\n this.render();\n};\n\n\n/**\n * @private\n */\nPluggableMap.prototype.handleViewChanged_ = function() {\n if (this.viewPropertyListenerKey_) {\n unlistenByKey(this.viewPropertyListenerKey_);\n this.viewPropertyListenerKey_ = null;\n }\n if (this.viewChangeListenerKey_) {\n unlistenByKey(this.viewChangeListenerKey_);\n this.viewChangeListenerKey_ = null;\n }\n const view = this.getView();\n if (view) {\n this.viewport_.setAttribute('data-view', getUid(view));\n this.viewPropertyListenerKey_ = listen(\n view, ObjectEventType.PROPERTYCHANGE,\n this.handleViewPropertyChanged_, this);\n this.viewChangeListenerKey_ = listen(\n view, EventType.CHANGE,\n this.handleViewPropertyChanged_, this);\n }\n this.render();\n};\n\n\n/**\n * @private\n */\nPluggableMap.prototype.handleLayerGroupChanged_ = function() {\n if (this.layerGroupPropertyListenerKeys_) {\n this.layerGroupPropertyListenerKeys_.forEach(unlistenByKey);\n this.layerGroupPropertyListenerKeys_ = null;\n }\n const layerGroup = this.getLayerGroup();\n if (layerGroup) {\n this.layerGroupPropertyListenerKeys_ = [\n listen(\n layerGroup, ObjectEventType.PROPERTYCHANGE,\n this.render, this),\n listen(\n layerGroup, EventType.CHANGE,\n this.render, this)\n ];\n }\n this.render();\n};\n\n\n/**\n * @return {boolean} Is rendered.\n */\nPluggableMap.prototype.isRendered = function() {\n return !!this.frameState_;\n};\n\n\n/**\n * Requests an immediate render in a synchronous manner.\n * @api\n */\nPluggableMap.prototype.renderSync = function() {\n if (this.animationDelayKey_) {\n cancelAnimationFrame(this.animationDelayKey_);\n }\n this.animationDelay_();\n};\n\n\n/**\n * Request a map rendering (at the next animation frame).\n * @api\n */\nPluggableMap.prototype.render = function() {\n if (this.animationDelayKey_ === undefined) {\n this.animationDelayKey_ = requestAnimationFrame(this.animationDelay_);\n }\n};\n\n\n/**\n * Remove the given control from the map.\n * @param {module:ol/control/Control} control Control.\n * @return {module:ol/control/Control|undefined} The removed control (or undefined\n * if the control was not found).\n * @api\n */\nPluggableMap.prototype.removeControl = function(control) {\n return this.getControls().remove(control);\n};\n\n\n/**\n * Remove the given interaction from the map.\n * @param {module:ol/interaction/Interaction} interaction Interaction to remove.\n * @return {module:ol/interaction/Interaction|undefined} The removed interaction (or\n * undefined if the interaction was not found).\n * @api\n */\nPluggableMap.prototype.removeInteraction = function(interaction) {\n return this.getInteractions().remove(interaction);\n};\n\n\n/**\n * Removes the given layer from the map.\n * @param {module:ol/layer/Base} layer Layer.\n * @return {module:ol/layer/Base|undefined} The removed layer (or undefined if the\n * layer was not found).\n * @api\n */\nPluggableMap.prototype.removeLayer = function(layer) {\n const layers = this.getLayerGroup().getLayers();\n return layers.remove(layer);\n};\n\n\n/**\n * Remove the given overlay from the map.\n * @param {module:ol/Overlay} overlay Overlay.\n * @return {module:ol/Overlay|undefined} The removed overlay (or undefined\n * if the overlay was not found).\n * @api\n */\nPluggableMap.prototype.removeOverlay = function(overlay) {\n return this.getOverlays().remove(overlay);\n};\n\n\n/**\n * @param {number} time Time.\n * @private\n */\nPluggableMap.prototype.renderFrame_ = function(time) {\n let viewState;\n\n const size = this.getSize();\n const view = this.getView();\n const extent = createEmpty();\n const previousFrameState = this.frameState_;\n /** @type {?module:ol/PluggableMap~FrameState} */\n let frameState = null;\n if (size !== undefined && hasArea(size) && view && view.isDef()) {\n const viewHints = view.getHints(this.frameState_ ? this.frameState_.viewHints : undefined);\n const layerStatesArray = this.getLayerGroup().getLayerStatesArray();\n const layerStates = {};\n for (let i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n layerStates[getUid(layerStatesArray[i].layer)] = layerStatesArray[i];\n }\n viewState = view.getState();\n let focus = this.focus_;\n if (!focus) {\n focus = viewState.center;\n const pixelResolution = viewState.resolution / this.pixelRatio_;\n focus[0] = Math.round(focus[0] / pixelResolution) * pixelResolution;\n focus[1] = Math.round(focus[1] / pixelResolution) * pixelResolution;\n }\n frameState = /** @type {module:ol/PluggableMap~FrameState} */ ({\n animate: false,\n coordinateToPixelTransform: this.coordinateToPixelTransform_,\n extent: extent,\n focus: focus,\n index: this.frameIndex_++,\n layerStates: layerStates,\n layerStatesArray: layerStatesArray,\n pixelRatio: this.pixelRatio_,\n pixelToCoordinateTransform: this.pixelToCoordinateTransform_,\n postRenderFunctions: [],\n size: size,\n skippedFeatureUids: this.skippedFeatureUids_,\n tileQueue: this.tileQueue_,\n time: time,\n usedTiles: {},\n viewState: viewState,\n viewHints: viewHints,\n wantedTiles: {}\n });\n }\n\n if (frameState) {\n frameState.extent = getForViewAndSize(viewState.center,\n viewState.resolution, viewState.rotation, frameState.size, extent);\n }\n\n this.frameState_ = frameState;\n this.renderer_.renderFrame(frameState);\n\n if (frameState) {\n if (frameState.animate) {\n this.render();\n }\n Array.prototype.push.apply(this.postRenderFunctions_, frameState.postRenderFunctions);\n\n if (previousFrameState) {\n const moveStart = !this.previousExtent_ ||\n (!isEmpty(this.previousExtent_) &&\n !equals(frameState.extent, this.previousExtent_));\n if (moveStart) {\n this.dispatchEvent(\n new MapEvent(MapEventType.MOVESTART, this, previousFrameState));\n this.previousExtent_ = createOrUpdateEmpty(this.previousExtent_);\n }\n }\n\n const idle = this.previousExtent_ &&\n !frameState.viewHints[ViewHint.ANIMATING] &&\n !frameState.viewHints[ViewHint.INTERACTING] &&\n !equals(frameState.extent, this.previousExtent_);\n\n if (idle) {\n this.dispatchEvent(new MapEvent(MapEventType.MOVEEND, this, frameState));\n clone(frameState.extent, this.previousExtent_);\n }\n }\n\n this.dispatchEvent(new MapEvent(MapEventType.POSTRENDER, this, frameState));\n\n setTimeout(this.handlePostRender.bind(this), 0);\n\n};\n\n\n/**\n * Sets the layergroup of this map.\n * @param {module:ol/layer/Group} layerGroup A layer group containing the layers in this map.\n * @observable\n * @api\n */\nPluggableMap.prototype.setLayerGroup = function(layerGroup) {\n this.set(MapProperty.LAYERGROUP, layerGroup);\n};\n\n\n/**\n * Set the size of this map.\n * @param {module:ol/size~Size|undefined} size The size in pixels of the map in the DOM.\n * @observable\n * @api\n */\nPluggableMap.prototype.setSize = function(size) {\n this.set(MapProperty.SIZE, size);\n};\n\n\n/**\n * Set the target element to render this map into.\n * @param {Element|string|undefined} target The Element or id of the Element\n * that the map is rendered in.\n * @observable\n * @api\n */\nPluggableMap.prototype.setTarget = function(target) {\n this.set(MapProperty.TARGET, target);\n};\n\n\n/**\n * Set the view for this map.\n * @param {module:ol/View} view The view that controls this map.\n * @observable\n * @api\n */\nPluggableMap.prototype.setView = function(view) {\n this.set(MapProperty.VIEW, view);\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature.\n */\nPluggableMap.prototype.skipFeature = function(feature) {\n const featureUid = getUid(feature).toString();\n this.skippedFeatureUids_[featureUid] = true;\n this.render();\n};\n\n\n/**\n * Force a recalculation of the map viewport size. This should be called when\n * third-party code changes the size of the map viewport.\n * @api\n */\nPluggableMap.prototype.updateSize = function() {\n const targetElement = this.getTargetElement();\n\n if (!targetElement) {\n this.setSize(undefined);\n } else {\n const computedStyle = getComputedStyle(targetElement);\n this.setSize([\n targetElement.offsetWidth -\n parseFloat(computedStyle['borderLeftWidth']) -\n parseFloat(computedStyle['paddingLeft']) -\n parseFloat(computedStyle['paddingRight']) -\n parseFloat(computedStyle['borderRightWidth']),\n targetElement.offsetHeight -\n parseFloat(computedStyle['borderTopWidth']) -\n parseFloat(computedStyle['paddingTop']) -\n parseFloat(computedStyle['paddingBottom']) -\n parseFloat(computedStyle['borderBottomWidth'])\n ]);\n }\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature.\n */\nPluggableMap.prototype.unskipFeature = function(feature) {\n const featureUid = getUid(feature).toString();\n delete this.skippedFeatureUids_[featureUid];\n this.render();\n};\n\n\n/**\n * @param {MapOptions} options Map options.\n * @return {module:ol/PluggableMap~MapOptionsInternal} Internal map options.\n */\nfunction createOptionsInternal(options) {\n\n /**\n * @type {Element|Document}\n */\n let keyboardEventTarget = null;\n if (options.keyboardEventTarget !== undefined) {\n keyboardEventTarget = typeof options.keyboardEventTarget === 'string' ?\n document.getElementById(options.keyboardEventTarget) :\n options.keyboardEventTarget;\n }\n\n /**\n * @type {Object.<string, *>}\n */\n const values = {};\n\n const layerGroup = (options.layers instanceof LayerGroup) ?\n options.layers : new LayerGroup({layers: options.layers});\n values[MapProperty.LAYERGROUP] = layerGroup;\n\n values[MapProperty.TARGET] = options.target;\n\n values[MapProperty.VIEW] = options.view !== undefined ?\n options.view : new View();\n\n let controls;\n if (options.controls !== undefined) {\n if (Array.isArray(options.controls)) {\n controls = new Collection(options.controls.slice());\n } else {\n assert(options.controls instanceof Collection,\n 47); // Expected `controls` to be an array or an `module:ol/Collection~Collection`\n controls = options.controls;\n }\n }\n\n let interactions;\n if (options.interactions !== undefined) {\n if (Array.isArray(options.interactions)) {\n interactions = new Collection(options.interactions.slice());\n } else {\n assert(options.interactions instanceof Collection,\n 48); // Expected `interactions` to be an array or an `module:ol/Collection~Collection`\n interactions = options.interactions;\n }\n }\n\n let overlays;\n if (options.overlays !== undefined) {\n if (Array.isArray(options.overlays)) {\n overlays = new Collection(options.overlays.slice());\n } else {\n assert(options.overlays instanceof Collection,\n 49); // Expected `overlays` to be an array or an `module:ol/Collection~Collection`\n overlays = options.overlays;\n }\n } else {\n overlays = new Collection();\n }\n\n return {\n controls: controls,\n interactions: interactions,\n keyboardEventTarget: keyboardEventTarget,\n overlays: overlays,\n values: values\n };\n\n}\nexport default PluggableMap;\n","/**\n * @module ol/control/Control\n */\nimport {inherits} from '../util.js';\nimport {UNDEFINED} from '../functions.js';\nimport MapEventType from '../MapEventType.js';\nimport BaseObject from '../Object.js';\nimport {removeNode} from '../dom.js';\nimport {listen, unlistenByKey} from '../events.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {Element} [element] The element is the control's\n * container element. This only needs to be specified if you're developing\n * a custom control.\n * @property {function(module:ol/MapEvent)} [render] Function called when\n * the control should be re-rendered. This is called in a `requestAnimationFrame`\n * callback.\n * @property {Element|string} [target] Specify a target if you want\n * the control to be rendered outside of the map's viewport.\n */\n\n\n/**\n * @classdesc\n * A control is a visible widget with a DOM element in a fixed position on the\n * screen. They can involve user input (buttons), or be informational only;\n * the position is determined using CSS. By default these are placed in the\n * container with CSS class name `ol-overlaycontainer-stopevent`, but can use\n * any outside DOM element.\n *\n * This is the base class for controls. You can use it for simple custom\n * controls by creating the element with listeners, creating an instance:\n * ```js\n * var myControl = new Control({element: myElement});\n * ```\n * and then adding this to the map.\n *\n * The main advantage of having this as a control rather than a simple separate\n * DOM element is that preventing propagation is handled for you. Controls\n * will also be objects in a {@link module:ol/Collection~Collection}, so you can use their methods.\n *\n * You can also extend this base for your own control class. See\n * examples/custom-controls for an example of how to do this.\n *\n * @constructor\n * @extends {module:ol/Object}\n * @param {module:ol/control/Control~Options} options Control options.\n * @api\n */\nconst Control = function(options) {\n\n BaseObject.call(this);\n\n /**\n * @protected\n * @type {Element}\n */\n this.element = options.element ? options.element : null;\n\n /**\n * @private\n * @type {Element}\n */\n this.target_ = null;\n\n /**\n * @private\n * @type {module:ol/PluggableMap}\n */\n this.map_ = null;\n\n /**\n * @protected\n * @type {!Array.<module:ol/events~EventsKey>}\n */\n this.listenerKeys = [];\n\n /**\n * @type {function(module:ol/MapEvent)}\n */\n this.render = options.render ? options.render : UNDEFINED;\n\n if (options.target) {\n this.setTarget(options.target);\n }\n\n};\n\ninherits(Control, BaseObject);\n\n\n/**\n * @inheritDoc\n */\nControl.prototype.disposeInternal = function() {\n removeNode(this.element);\n BaseObject.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * Get the map associated with this control.\n * @return {module:ol/PluggableMap} Map.\n * @api\n */\nControl.prototype.getMap = function() {\n return this.map_;\n};\n\n\n/**\n * Remove the control from its current map and attach it to the new map.\n * Subclasses may set up event handlers to get notified about changes to\n * the map here.\n * @param {module:ol/PluggableMap} map Map.\n * @api\n */\nControl.prototype.setMap = function(map) {\n if (this.map_) {\n removeNode(this.element);\n }\n for (let i = 0, ii = this.listenerKeys.length; i < ii; ++i) {\n unlistenByKey(this.listenerKeys[i]);\n }\n this.listenerKeys.length = 0;\n this.map_ = map;\n if (this.map_) {\n const target = this.target_ ?\n this.target_ : map.getOverlayContainerStopEvent();\n target.appendChild(this.element);\n if (this.render !== UNDEFINED) {\n this.listenerKeys.push(listen(map,\n MapEventType.POSTRENDER, this.render, this));\n }\n map.render();\n }\n};\n\n\n/**\n * This function is used to set a target element for the control. It has no\n * effect if it is called after the control has been added to the map (i.e.\n * after `setMap` is called on the control). If no `target` is set in the\n * options passed to the control constructor and if `setTarget` is not called\n * then the control is added to the map's overlay container.\n * @param {Element|string} target Target.\n * @api\n */\nControl.prototype.setTarget = function(target) {\n this.target_ = typeof target === 'string' ?\n document.getElementById(target) :\n target;\n};\nexport default Control;\n","/**\n * @module ol/layer/Layer\n */\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getUid, inherits} from '../util.js';\nimport {getChangeEventType} from '../Object.js';\nimport BaseLayer from '../layer/Base.js';\nimport LayerProperty from '../layer/Property.js';\nimport {assign} from '../obj.js';\nimport RenderEventType from '../render/EventType.js';\nimport SourceState from '../source/State.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {module:ol/extent~Extent} [extent] The bounding extent for layer rendering. The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex=0] The z-index for layer rendering. At rendering time, the layers\n * will be ordered, first by Z-index and then by position.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {module:ol/source/Source} [source] Source for this layer. If not provided to the constructor,\n * the source can be set by calling {@link module:ol/layer/Layer#setSource layer.setSource(source)} after\n * construction.\n */\n\n\n/**\n * @typedef {Object} State\n * @property {module:ol/layer/Layer} layer\n * @property {number} opacity\n * @property {module:ol/source/Source~State} sourceState\n * @property {boolean} visible\n * @property {boolean} managed\n * @property {module:ol/extent~Extent} [extent]\n * @property {number} zIndex\n * @property {number} maxResolution\n * @property {number} minResolution\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * A visual representation of raster or vector map data.\n * Layers group together those properties that pertain to how the data is to be\n * displayed, irrespective of the source of that data.\n *\n * Layers are usually added to a map with {@link module:ol/Map#addLayer}. Components\n * like {@link module:ol/interaction/Select~Select} use unmanaged layers\n * internally. These unmanaged layers are associated with the map using\n * {@link module:ol/layer/Layer~Layer#setMap} instead.\n *\n * A generic `change` event is fired when the state of the source changes.\n *\n * @constructor\n * @abstract\n * @extends {module:ol/layer/Base}\n * @fires module:ol/render/Event~RenderEvent\n * @param {module:ol/layer/Layer~Options} options Layer options.\n * @api\n */\nconst Layer = function(options) {\n\n const baseOptions = assign({}, options);\n delete baseOptions.source;\n\n BaseLayer.call(this, /** @type {module:ol/layer/Base~Options} */ (baseOptions));\n\n /**\n * @private\n * @type {?module:ol/events~EventsKey}\n */\n this.mapPrecomposeKey_ = null;\n\n /**\n * @private\n * @type {?module:ol/events~EventsKey}\n */\n this.mapRenderKey_ = null;\n\n /**\n * @private\n * @type {?module:ol/events~EventsKey}\n */\n this.sourceChangeKey_ = null;\n\n if (options.map) {\n this.setMap(options.map);\n }\n\n listen(this,\n getChangeEventType(LayerProperty.SOURCE),\n this.handleSourcePropertyChange_, this);\n\n const source = options.source ? options.source : null;\n this.setSource(source);\n};\n\ninherits(Layer, BaseLayer);\n\n\n/**\n * Return `true` if the layer is visible, and if the passed resolution is\n * between the layer's minResolution and maxResolution. The comparison is\n * inclusive for `minResolution` and exclusive for `maxResolution`.\n * @param {module:ol/layer/Layer~State} layerState Layer state.\n * @param {number} resolution Resolution.\n * @return {boolean} The layer is visible at the given resolution.\n */\nexport function visibleAtResolution(layerState, resolution) {\n return layerState.visible && resolution >= layerState.minResolution &&\n resolution < layerState.maxResolution;\n}\n\n\n/**\n * @inheritDoc\n */\nLayer.prototype.getLayersArray = function(opt_array) {\n const array = opt_array ? opt_array : [];\n array.push(this);\n return array;\n};\n\n\n/**\n * @inheritDoc\n */\nLayer.prototype.getLayerStatesArray = function(opt_states) {\n const states = opt_states ? opt_states : [];\n states.push(this.getLayerState());\n return states;\n};\n\n\n/**\n * Get the layer source.\n * @return {module:ol/source/Source} The layer source (or `null` if not yet set).\n * @observable\n * @api\n */\nLayer.prototype.getSource = function() {\n const source = this.get(LayerProperty.SOURCE);\n return (\n /** @type {module:ol/source/Source} */ (source) || null\n );\n};\n\n\n/**\n * @inheritDoc\n */\nLayer.prototype.getSourceState = function() {\n const source = this.getSource();\n return !source ? SourceState.UNDEFINED : source.getState();\n};\n\n\n/**\n * @private\n */\nLayer.prototype.handleSourceChange_ = function() {\n this.changed();\n};\n\n\n/**\n * @private\n */\nLayer.prototype.handleSourcePropertyChange_ = function() {\n if (this.sourceChangeKey_) {\n unlistenByKey(this.sourceChangeKey_);\n this.sourceChangeKey_ = null;\n }\n const source = this.getSource();\n if (source) {\n this.sourceChangeKey_ = listen(source,\n EventType.CHANGE, this.handleSourceChange_, this);\n }\n this.changed();\n};\n\n\n/**\n * Sets the layer to be rendered on top of other layers on a map. The map will\n * not manage this layer in its layers collection, and the callback in\n * {@link module:ol/Map#forEachLayerAtPixel} will receive `null` as layer. This\n * is useful for temporary layers. To remove an unmanaged layer from the map,\n * use `#setMap(null)`.\n *\n * To add the layer to a map and have it managed by the map, use\n * {@link module:ol/Map#addLayer} instead.\n * @param {module:ol/PluggableMap} map Map.\n * @api\n */\nLayer.prototype.setMap = function(map) {\n if (this.mapPrecomposeKey_) {\n unlistenByKey(this.mapPrecomposeKey_);\n this.mapPrecomposeKey_ = null;\n }\n if (!map) {\n this.changed();\n }\n if (this.mapRenderKey_) {\n unlistenByKey(this.mapRenderKey_);\n this.mapRenderKey_ = null;\n }\n if (map) {\n this.mapPrecomposeKey_ = listen(map, RenderEventType.PRECOMPOSE, function(evt) {\n const layerState = this.getLayerState();\n layerState.managed = false;\n layerState.zIndex = Infinity;\n evt.frameState.layerStatesArray.push(layerState);\n evt.frameState.layerStates[getUid(this)] = layerState;\n }, this);\n this.mapRenderKey_ = listen(this, EventType.CHANGE, map.render, map);\n this.changed();\n }\n};\n\n\n/**\n * Set the layer source.\n * @param {module:ol/source/Source} source The layer source.\n * @observable\n * @api\n */\nLayer.prototype.setSource = function(source) {\n this.set(LayerProperty.SOURCE, source);\n};\nexport default Layer;\n","/**\n * @module ol/control/Attribution\n */\nimport {inherits} from '../util.js';\nimport {equals} from '../array.js';\nimport Control from '../control/Control.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE, CLASS_COLLAPSED} from '../css.js';\nimport {removeChildren, replaceNode} from '../dom.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {visibleAtResolution} from '../layer/Layer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-attribution'] CSS class name.\n * @property {Element|string} [target] Specify a target if you\n * want the control to be rendered outside of the map's\n * viewport.\n * @property {boolean} [collapsible=true] Specify if attributions can\n * be collapsed. If you use an OSM source, should be set to `false` — see\n * {@link https://www.openstreetmap.org/copyright OSM Copyright} —\n * @property {boolean} [collapsed=true] Specify if attributions should\n * be collapsed at startup.\n * @property {string} [tipLabel='Attributions'] Text label to use for the button tip.\n * @property {string} [label='i'] Text label to use for the\n * collapsed attributions button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string|Element} [collapseLabel='»'] Text label to use\n * for the expanded attributions button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {function(module:ol/MapEvent)} [render] Function called when\n * the control should be re-rendered. This is called in a `requestAnimationFrame`\n * callback.\n */\n\n\n/**\n * @classdesc\n * Control to show all the attributions associated with the layer sources\n * in the map. This control is one of the default controls included in maps.\n * By default it will show in the bottom right portion of the map, but this can\n * be changed by using a css selector for `.ol-attribution`.\n *\n * @constructor\n * @extends {module:ol/control/Control}\n * @param {module:ol/control/Attribution~Options=} opt_options Attribution options.\n * @api\n */\nconst Attribution = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n /**\n * @private\n * @type {Element}\n */\n this.ulElement_ = document.createElement('UL');\n\n /**\n * @private\n * @type {boolean}\n */\n this.collapsed_ = options.collapsed !== undefined ? options.collapsed : true;\n\n /**\n * @private\n * @type {boolean}\n */\n this.collapsible_ = options.collapsible !== undefined ?\n options.collapsible : true;\n\n if (!this.collapsible_) {\n this.collapsed_ = false;\n }\n\n const className = options.className !== undefined ? options.className : 'ol-attribution';\n\n const tipLabel = options.tipLabel !== undefined ? options.tipLabel : 'Attributions';\n\n const collapseLabel = options.collapseLabel !== undefined ? options.collapseLabel : '\\u00BB';\n\n if (typeof collapseLabel === 'string') {\n /**\n * @private\n * @type {Element}\n */\n this.collapseLabel_ = document.createElement('span');\n this.collapseLabel_.textContent = collapseLabel;\n } else {\n this.collapseLabel_ = collapseLabel;\n }\n\n const label = options.label !== undefined ? options.label : 'i';\n\n if (typeof label === 'string') {\n /**\n * @private\n * @type {Element}\n */\n this.label_ = document.createElement('span');\n this.label_.textContent = label;\n } else {\n this.label_ = label;\n }\n\n\n const activeLabel = (this.collapsible_ && !this.collapsed_) ?\n this.collapseLabel_ : this.label_;\n const button = document.createElement('button');\n button.setAttribute('type', 'button');\n button.title = tipLabel;\n button.appendChild(activeLabel);\n\n listen(button, EventType.CLICK, this.handleClick_, this);\n\n const cssClasses = className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL +\n (this.collapsed_ && this.collapsible_ ? ' ' + CLASS_COLLAPSED : '') +\n (this.collapsible_ ? '' : ' ol-uncollapsible');\n const element = document.createElement('div');\n element.className = cssClasses;\n element.appendChild(this.ulElement_);\n element.appendChild(button);\n\n Control.call(this, {\n element: element,\n render: options.render || render,\n target: options.target\n });\n\n /**\n * A list of currently rendered resolutions.\n * @type {Array.<string>}\n * @private\n */\n this.renderedAttributions_ = [];\n\n /**\n * @private\n * @type {boolean}\n */\n this.renderedVisible_ = true;\n\n};\n\ninherits(Attribution, Control);\n\n\n/**\n * Get a list of visible attributions.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @return {Array.<string>} Attributions.\n * @private\n */\nAttribution.prototype.getSourceAttributions_ = function(frameState) {\n /**\n * Used to determine if an attribution already exists.\n * @type {!Object.<string, boolean>}\n */\n const lookup = {};\n\n /**\n * A list of visible attributions.\n * @type {Array.<string>}\n */\n const visibleAttributions = [];\n\n const layerStatesArray = frameState.layerStatesArray;\n const resolution = frameState.viewState.resolution;\n for (let i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n const layerState = layerStatesArray[i];\n if (!visibleAtResolution(layerState, resolution)) {\n continue;\n }\n\n const source = layerState.layer.getSource();\n if (!source) {\n continue;\n }\n\n const attributionGetter = source.getAttributions();\n if (!attributionGetter) {\n continue;\n }\n\n const attributions = attributionGetter(frameState);\n if (!attributions) {\n continue;\n }\n\n if (Array.isArray(attributions)) {\n for (let j = 0, jj = attributions.length; j < jj; ++j) {\n if (!(attributions[j] in lookup)) {\n visibleAttributions.push(attributions[j]);\n lookup[attributions[j]] = true;\n }\n }\n } else {\n if (!(attributions in lookup)) {\n visibleAttributions.push(attributions);\n lookup[attributions] = true;\n }\n }\n }\n return visibleAttributions;\n};\n\n\n/**\n * Update the attribution element.\n * @param {module:ol/MapEvent} mapEvent Map event.\n * @this {module:ol/control/Attribution}\n * @api\n */\nexport function render(mapEvent) {\n this.updateElement_(mapEvent.frameState);\n}\n\n\n/**\n * @private\n * @param {?module:ol/PluggableMap~FrameState} frameState Frame state.\n */\nAttribution.prototype.updateElement_ = function(frameState) {\n if (!frameState) {\n if (this.renderedVisible_) {\n this.element.style.display = 'none';\n this.renderedVisible_ = false;\n }\n return;\n }\n\n const attributions = this.getSourceAttributions_(frameState);\n\n const visible = attributions.length > 0;\n if (this.renderedVisible_ != visible) {\n this.element.style.display = visible ? '' : 'none';\n this.renderedVisible_ = visible;\n }\n\n if (equals(attributions, this.renderedAttributions_)) {\n return;\n }\n\n removeChildren(this.ulElement_);\n\n // append the attributions\n for (let i = 0, ii = attributions.length; i < ii; ++i) {\n const element = document.createElement('LI');\n element.innerHTML = attributions[i];\n this.ulElement_.appendChild(element);\n }\n\n this.renderedAttributions_ = attributions;\n};\n\n\n/**\n * @param {Event} event The event to handle\n * @private\n */\nAttribution.prototype.handleClick_ = function(event) {\n event.preventDefault();\n this.handleToggle_();\n};\n\n\n/**\n * @private\n */\nAttribution.prototype.handleToggle_ = function() {\n this.element.classList.toggle(CLASS_COLLAPSED);\n if (this.collapsed_) {\n replaceNode(this.collapseLabel_, this.label_);\n } else {\n replaceNode(this.label_, this.collapseLabel_);\n }\n this.collapsed_ = !this.collapsed_;\n};\n\n\n/**\n * Return `true` if the attribution is collapsible, `false` otherwise.\n * @return {boolean} True if the widget is collapsible.\n * @api\n */\nAttribution.prototype.getCollapsible = function() {\n return this.collapsible_;\n};\n\n\n/**\n * Set whether the attribution should be collapsible.\n * @param {boolean} collapsible True if the widget is collapsible.\n * @api\n */\nAttribution.prototype.setCollapsible = function(collapsible) {\n if (this.collapsible_ === collapsible) {\n return;\n }\n this.collapsible_ = collapsible;\n this.element.classList.toggle('ol-uncollapsible');\n if (!collapsible && this.collapsed_) {\n this.handleToggle_();\n }\n};\n\n\n/**\n * Collapse or expand the attribution according to the passed parameter. Will\n * not do anything if the attribution isn't collapsible or if the current\n * collapsed state is already the one requested.\n * @param {boolean} collapsed True if the widget is collapsed.\n * @api\n */\nAttribution.prototype.setCollapsed = function(collapsed) {\n if (!this.collapsible_ || this.collapsed_ === collapsed) {\n return;\n }\n this.handleToggle_();\n};\n\n\n/**\n * Return `true` when the attribution is currently collapsed or `false`\n * otherwise.\n * @return {boolean} True if the widget is collapsed.\n * @api\n */\nAttribution.prototype.getCollapsed = function() {\n return this.collapsed_;\n};\nexport default Attribution;\n","/**\n * @module ol/control/Rotate\n */\n\nimport Control from '../control/Control.js';\nimport {CLASS_CONTROL, CLASS_HIDDEN, CLASS_UNSELECTABLE} from '../css.js';\nimport {easeOut} from '../easing.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {inherits} from '../util.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-rotate'] CSS class name.\n * @property {string|Element} [label='⇧'] Text label to use for the rotate button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [tipLabel='Reset rotation'] Text label to use for the rotate tip.\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {boolean} [autoHide=true] Hide the control when rotation is 0.\n * @property {function(module:ol/MapEvent)} [render] Function called when the control should\n * be re-rendered. This is called in a `requestAnimationFrame` callback.\n * @property {function()} [resetNorth] Function called when the control is clicked.\n * This will override the default `resetNorth`.\n * @property {Element|string} [target] Specify a target if you want the control to be\n * rendered outside of the map's viewport.\n */\n\n\n/**\n * @classdesc\n * A button control to reset rotation to 0.\n * To style this control use css selector `.ol-rotate`. A `.ol-hidden` css\n * selector is added to the button when the rotation is 0.\n *\n * @constructor\n * @extends {module:ol/control/Control}\n * @param {module:ol/control/Rotate~Options=} opt_options Rotate options.\n * @api\n */\nconst Rotate = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n const className = options.className !== undefined ? options.className : 'ol-rotate';\n\n const label = options.label !== undefined ? options.label : '\\u21E7';\n\n /**\n * @type {Element}\n * @private\n */\n this.label_ = null;\n\n if (typeof label === 'string') {\n this.label_ = document.createElement('span');\n this.label_.className = 'ol-compass';\n this.label_.textContent = label;\n } else {\n this.label_ = label;\n this.label_.classList.add('ol-compass');\n }\n\n const tipLabel = options.tipLabel ? options.tipLabel : 'Reset rotation';\n\n const button = document.createElement('button');\n button.className = className + '-reset';\n button.setAttribute('type', 'button');\n button.title = tipLabel;\n button.appendChild(this.label_);\n\n listen(button, EventType.CLICK,\n Rotate.prototype.handleClick_, this);\n\n const cssClasses = className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n const element = document.createElement('div');\n element.className = cssClasses;\n element.appendChild(button);\n\n this.callResetNorth_ = options.resetNorth ? options.resetNorth : undefined;\n\n Control.call(this, {\n element: element,\n render: options.render || render,\n target: options.target\n });\n\n /**\n * @type {number}\n * @private\n */\n this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n /**\n * @type {boolean}\n * @private\n */\n this.autoHide_ = options.autoHide !== undefined ? options.autoHide : true;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.rotation_ = undefined;\n\n if (this.autoHide_) {\n this.element.classList.add(CLASS_HIDDEN);\n }\n\n};\n\ninherits(Rotate, Control);\n\n\n/**\n * @param {Event} event The event to handle\n * @private\n */\nRotate.prototype.handleClick_ = function(event) {\n event.preventDefault();\n if (this.callResetNorth_ !== undefined) {\n this.callResetNorth_();\n } else {\n this.resetNorth_();\n }\n};\n\n\n/**\n * @private\n */\nRotate.prototype.resetNorth_ = function() {\n const map = this.getMap();\n const view = map.getView();\n if (!view) {\n // the map does not have a view, so we can't act\n // upon it\n return;\n }\n if (view.getRotation() !== undefined) {\n if (this.duration_ > 0) {\n view.animate({\n rotation: 0,\n duration: this.duration_,\n easing: easeOut\n });\n } else {\n view.setRotation(0);\n }\n }\n};\n\n\n/**\n * Update the rotate control element.\n * @param {module:ol/MapEvent} mapEvent Map event.\n * @this {module:ol/control/Rotate}\n * @api\n */\nexport function render(mapEvent) {\n const frameState = mapEvent.frameState;\n if (!frameState) {\n return;\n }\n const rotation = frameState.viewState.rotation;\n if (rotation != this.rotation_) {\n const transform = 'rotate(' + rotation + 'rad)';\n if (this.autoHide_) {\n const contains = this.element.classList.contains(CLASS_HIDDEN);\n if (!contains && rotation === 0) {\n this.element.classList.add(CLASS_HIDDEN);\n } else if (contains && rotation !== 0) {\n this.element.classList.remove(CLASS_HIDDEN);\n }\n }\n this.label_.style.msTransform = transform;\n this.label_.style.webkitTransform = transform;\n this.label_.style.transform = transform;\n }\n this.rotation_ = rotation;\n}\n\nexport default Rotate;\n","/**\n * @module ol/control/Zoom\n */\nimport {inherits} from '../util.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport Control from '../control/Control.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';\nimport {easeOut} from '../easing.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {string} [className='ol-zoom'] CSS class name.\n * @property {string|Element} [zoomInLabel='+'] Text label to use for the zoom-in\n * button. Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string|Element} [zoomOutLabel='-'] Text label to use for the zoom-out button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [zoomInTipLabel='Zoom in'] Text label to use for the button tip.\n * @property {string} [zoomOutTipLabel='Zoom out'] Text label to use for the button tip.\n * @property {number} [delta=1] The zoom delta applied on each click.\n * @property {Element|string} [target] Specify a target if you want the control to be\n * rendered outside of the map's viewport.\n */\n\n\n/**\n * @classdesc\n * A control with 2 buttons, one for zoom in and one for zoom out.\n * This control is one of the default controls of a map. To style this control\n * use css selectors `.ol-zoom-in` and `.ol-zoom-out`.\n *\n * @constructor\n * @extends {module:ol/control/Control}\n * @param {module:ol/control/Zoom~Options=} opt_options Zoom options.\n * @api\n */\nconst Zoom = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n const className = options.className !== undefined ? options.className : 'ol-zoom';\n\n const delta = options.delta !== undefined ? options.delta : 1;\n\n const zoomInLabel = options.zoomInLabel !== undefined ? options.zoomInLabel : '+';\n const zoomOutLabel = options.zoomOutLabel !== undefined ? options.zoomOutLabel : '\\u2212';\n\n const zoomInTipLabel = options.zoomInTipLabel !== undefined ?\n options.zoomInTipLabel : 'Zoom in';\n const zoomOutTipLabel = options.zoomOutTipLabel !== undefined ?\n options.zoomOutTipLabel : 'Zoom out';\n\n const inElement = document.createElement('button');\n inElement.className = className + '-in';\n inElement.setAttribute('type', 'button');\n inElement.title = zoomInTipLabel;\n inElement.appendChild(\n typeof zoomInLabel === 'string' ? document.createTextNode(zoomInLabel) : zoomInLabel\n );\n\n listen(inElement, EventType.CLICK,\n Zoom.prototype.handleClick_.bind(this, delta));\n\n const outElement = document.createElement('button');\n outElement.className = className + '-out';\n outElement.setAttribute('type', 'button');\n outElement.title = zoomOutTipLabel;\n outElement.appendChild(\n typeof zoomOutLabel === 'string' ? document.createTextNode(zoomOutLabel) : zoomOutLabel\n );\n\n listen(outElement, EventType.CLICK,\n Zoom.prototype.handleClick_.bind(this, -delta));\n\n const cssClasses = className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n const element = document.createElement('div');\n element.className = cssClasses;\n element.appendChild(inElement);\n element.appendChild(outElement);\n\n Control.call(this, {\n element: element,\n target: options.target\n });\n\n /**\n * @type {number}\n * @private\n */\n this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n};\n\ninherits(Zoom, Control);\n\n\n/**\n * @param {number} delta Zoom delta.\n * @param {Event} event The event to handle\n * @private\n */\nZoom.prototype.handleClick_ = function(delta, event) {\n event.preventDefault();\n this.zoomByDelta_(delta);\n};\n\n\n/**\n * @param {number} delta Zoom delta.\n * @private\n */\nZoom.prototype.zoomByDelta_ = function(delta) {\n const map = this.getMap();\n const view = map.getView();\n if (!view) {\n // the map does not have a view, so we can't act\n // upon it\n return;\n }\n const currentResolution = view.getResolution();\n if (currentResolution) {\n const newResolution = view.constrainResolution(currentResolution, delta);\n if (this.duration_ > 0) {\n if (view.getAnimating()) {\n view.cancelAnimations();\n }\n view.animate({\n resolution: newResolution,\n duration: this.duration_,\n easing: easeOut\n });\n } else {\n view.setResolution(newResolution);\n }\n }\n};\nexport default Zoom;\n","/**\n * @module ol/control/util\n */\nimport Collection from '../Collection.js';\nimport Attribution from './Attribution.js';\nimport Rotate from './Rotate.js';\nimport Zoom from './Zoom.js';\n\n\n/**\n * @typedef {Object} DefaultsOptions\n * @property {boolean} [attribution=true] Include\n * {@link module:ol/control/Attribution~Attribution}.\n * @property {module:ol/control/Attribution~Options} [attributionOptions]\n * Options for {@link module:ol/control/Attribution~Attribution}.\n * @property {boolean} [rotate=true] Include\n * {@link module:ol/control/Rotate~Rotate}.\n * @property {module:ol/control/Rotate~Options} [rotateOptions] Options\n * for {@link module:ol/control/Rotate~Rotate}.\n * @property {boolean} [zoom] Include {@link module:ol/control/Zoom~Zoom}.\n * @property {module:ol/control/Zoom~Options} [zoomOptions] Options for\n * {@link module:ol/control/Zoom~Zoom}.\n * @api\n */\n\n\n/**\n * Set of controls included in maps by default. Unless configured otherwise,\n * this returns a collection containing an instance of each of the following\n * controls:\n * * {@link module:ol/control/Zoom~Zoom}\n * * {@link module:ol/control/Rotate~Rotate}\n * * {@link module:ol/control/Attribution~Attribution}\n *\n * @param {module:ol/control/util~DefaultsOptions=} opt_options\n * Defaults options.\n * @return {module:ol/Collection.<module:ol/control/Control>}\n * Controls.\n * @function module:ol/control.defaults\n * @api\n */\nexport function defaults(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n const controls = new Collection();\n\n const zoomControl = options.zoom !== undefined ? options.zoom : true;\n if (zoomControl) {\n controls.push(new Zoom(options.zoomOptions));\n }\n\n const rotateControl = options.rotate !== undefined ? options.rotate : true;\n if (rotateControl) {\n controls.push(new Rotate(options.rotateOptions));\n }\n\n const attributionControl = options.attribution !== undefined ?\n options.attribution : true;\n if (attributionControl) {\n controls.push(new Attribution(options.attributionOptions));\n }\n\n return controls;\n}\n","/**\n * @module ol/interaction/Property\n */\n\n/**\n * @enum {string}\n */\nexport default {\n ACTIVE: 'active'\n};\n","/**\n * @module ol/interaction/Interaction\n */\nimport {inherits} from '../util.js';\nimport BaseObject from '../Object.js';\nimport {easeOut, linear} from '../easing.js';\nimport InteractionProperty from '../interaction/Property.js';\nimport {clamp} from '../math.js';\n\n\n/**\n * Object literal with config options for interactions.\n * @typedef {Object} InteractionOptions\n * @property {function(module:ol/MapBrowserEvent):boolean} handleEvent\n * Method called by the map to notify the interaction that a browser event was\n * dispatched to the map. If the function returns a falsy value, propagation of\n * the event to other interactions in the map's interactions chain will be\n * prevented (this includes functions with no explicit return).\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * User actions that change the state of the map. Some are similar to controls,\n * but are not associated with a DOM element.\n * For example, {@link module:ol/interaction/KeyboardZoom~KeyboardZoom} is\n * functionally the same as {@link module:ol/control/Zoom~Zoom}, but triggered\n * by a keyboard event not a button element event.\n * Although interactions do not have a DOM element, some of them do render\n * vectors and so are visible on the screen.\n *\n * @constructor\n * @param {module:ol/interaction/Interaction~InteractionOptions} options Options.\n * @extends {module:ol/Object}\n * @api\n */\nconst Interaction = function(options) {\n\n BaseObject.call(this);\n\n /**\n * @private\n * @type {module:ol/PluggableMap}\n */\n this.map_ = null;\n\n this.setActive(true);\n\n /**\n * @type {function(module:ol/MapBrowserEvent):boolean}\n */\n this.handleEvent = options.handleEvent;\n\n};\n\ninherits(Interaction, BaseObject);\n\n\n/**\n * Return whether the interaction is currently active.\n * @return {boolean} `true` if the interaction is active, `false` otherwise.\n * @observable\n * @api\n */\nInteraction.prototype.getActive = function() {\n return /** @type {boolean} */ (this.get(InteractionProperty.ACTIVE));\n};\n\n\n/**\n * Get the map associated with this interaction.\n * @return {module:ol/PluggableMap} Map.\n * @api\n */\nInteraction.prototype.getMap = function() {\n return this.map_;\n};\n\n\n/**\n * Activate or deactivate the interaction.\n * @param {boolean} active Active.\n * @observable\n * @api\n */\nInteraction.prototype.setActive = function(active) {\n this.set(InteractionProperty.ACTIVE, active);\n};\n\n\n/**\n * Remove the interaction from its current map and attach it to the new map.\n * Subclasses may set up event handlers to get notified about changes to\n * the map here.\n * @param {module:ol/PluggableMap} map Map.\n */\nInteraction.prototype.setMap = function(map) {\n this.map_ = map;\n};\n\n\n/**\n * @param {module:ol/View} view View.\n * @param {module:ol/coordinate~Coordinate} delta Delta.\n * @param {number=} opt_duration Duration.\n */\nexport function pan(view, delta, opt_duration) {\n const currentCenter = view.getCenter();\n if (currentCenter) {\n const center = view.constrainCenter(\n [currentCenter[0] + delta[0], currentCenter[1] + delta[1]]);\n if (opt_duration) {\n view.animate({\n duration: opt_duration,\n easing: linear,\n center: center\n });\n } else {\n view.setCenter(center);\n }\n }\n}\n\n\n/**\n * @param {module:ol/View} view View.\n * @param {number|undefined} rotation Rotation.\n * @param {module:ol/coordinate~Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n */\nexport function rotate(view, rotation, opt_anchor, opt_duration) {\n rotation = view.constrainRotation(rotation, 0);\n rotateWithoutConstraints(view, rotation, opt_anchor, opt_duration);\n}\n\n\n/**\n * @param {module:ol/View} view View.\n * @param {number|undefined} rotation Rotation.\n * @param {module:ol/coordinate~Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n */\nexport function rotateWithoutConstraints(view, rotation, opt_anchor, opt_duration) {\n if (rotation !== undefined) {\n const currentRotation = view.getRotation();\n const currentCenter = view.getCenter();\n if (currentRotation !== undefined && currentCenter && opt_duration > 0) {\n view.animate({\n rotation: rotation,\n anchor: opt_anchor,\n duration: opt_duration,\n easing: easeOut\n });\n } else {\n view.rotate(rotation, opt_anchor);\n }\n }\n}\n\n\n/**\n * @param {module:ol/View} view View.\n * @param {number|undefined} resolution Resolution to go to.\n * @param {module:ol/coordinate~Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n * @param {number=} opt_direction Zooming direction; > 0 indicates\n * zooming out, in which case the constraints system will select\n * the largest nearest resolution; < 0 indicates zooming in, in\n * which case the constraints system will select the smallest\n * nearest resolution; == 0 indicates that the zooming direction\n * is unknown/not relevant, in which case the constraints system\n * will select the nearest resolution. If not defined 0 is\n * assumed.\n */\nexport function zoom(view, resolution, opt_anchor, opt_duration, opt_direction) {\n resolution = view.constrainResolution(resolution, 0, opt_direction);\n zoomWithoutConstraints(view, resolution, opt_anchor, opt_duration);\n}\n\n\n/**\n * @param {module:ol/View} view View.\n * @param {number} delta Delta from previous zoom level.\n * @param {module:ol/coordinate~Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n */\nexport function zoomByDelta(view, delta, opt_anchor, opt_duration) {\n const currentResolution = view.getResolution();\n let resolution = view.constrainResolution(currentResolution, delta, 0);\n\n if (resolution !== undefined) {\n const resolutions = view.getResolutions();\n resolution = clamp(\n resolution,\n view.getMinResolution() || resolutions[resolutions.length - 1],\n view.getMaxResolution() || resolutions[0]);\n }\n\n // If we have a constraint on center, we need to change the anchor so that the\n // new center is within the extent. We first calculate the new center, apply\n // the constraint to it, and then calculate back the anchor\n if (opt_anchor && resolution !== undefined && resolution !== currentResolution) {\n const currentCenter = view.getCenter();\n let center = view.calculateCenterZoom(resolution, opt_anchor);\n center = view.constrainCenter(center);\n\n opt_anchor = [\n (resolution * currentCenter[0] - currentResolution * center[0]) /\n (resolution - currentResolution),\n (resolution * currentCenter[1] - currentResolution * center[1]) /\n (resolution - currentResolution)\n ];\n }\n\n zoomWithoutConstraints(view, resolution, opt_anchor, opt_duration);\n}\n\n\n/**\n * @param {module:ol/View} view View.\n * @param {number|undefined} resolution Resolution to go to.\n * @param {module:ol/coordinate~Coordinate=} opt_anchor Anchor coordinate.\n * @param {number=} opt_duration Duration.\n */\nexport function zoomWithoutConstraints(view, resolution, opt_anchor, opt_duration) {\n if (resolution) {\n const currentResolution = view.getResolution();\n const currentCenter = view.getCenter();\n if (currentResolution !== undefined && currentCenter &&\n resolution !== currentResolution && opt_duration) {\n view.animate({\n resolution: resolution,\n anchor: opt_anchor,\n duration: opt_duration,\n easing: easeOut\n });\n } else {\n if (opt_anchor) {\n const center = view.calculateCenterZoom(resolution, opt_anchor);\n view.setCenter(center);\n }\n view.setResolution(resolution);\n }\n }\n}\n\nexport default Interaction;\n","/**\n * @module ol/interaction/DoubleClickZoom\n */\nimport {inherits} from '../util.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport Interaction, {zoomByDelta} from '../interaction/Interaction.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {number} [delta=1] The zoom delta applied on each double click.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom by double-clicking on the map.\n *\n * @constructor\n * @extends {module:ol/interaction/Interaction}\n * @param {module:ol/interaction/DoubleClickZoom~Options=} opt_options Options.\n * @api\n */\nconst DoubleClickZoom = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n /**\n * @private\n * @type {number}\n */\n this.delta_ = options.delta ? options.delta : 1;\n\n Interaction.call(this, {\n handleEvent: handleEvent\n });\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n};\n\ninherits(DoubleClickZoom, Interaction);\n\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} (if it was a\n * doubleclick) and eventually zooms the map.\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @this {module:ol/interaction/DoubleClickZoom}\n */\nfunction handleEvent(mapBrowserEvent) {\n let stopEvent = false;\n const browserEvent = mapBrowserEvent.originalEvent;\n if (mapBrowserEvent.type == MapBrowserEventType.DBLCLICK) {\n const map = mapBrowserEvent.map;\n const anchor = mapBrowserEvent.coordinate;\n const delta = browserEvent.shiftKey ? -this.delta_ : this.delta_;\n const view = map.getView();\n zoomByDelta(view, delta, anchor, this.duration_);\n mapBrowserEvent.preventDefault();\n stopEvent = true;\n }\n return !stopEvent;\n}\n\nexport default DoubleClickZoom;\n","/**\n * @module ol/events/condition\n */\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport {assert} from '../asserts.js';\nimport {TRUE, FALSE} from '../functions.js';\nimport {WEBKIT, MAC} from '../has.js';\n\n\n/**\n * A function that takes an {@link module:ol/MapBrowserEvent} and returns a\n * `{boolean}`. If the condition is met, true should be returned.\n *\n * @typedef {function(this: ?, module:ol/MapBrowserEvent): boolean} Condition\n */\n\n\n/**\n * Return `true` if only the alt-key is pressed, `false` otherwise (e.g. when\n * additionally the shift-key is pressed).\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the alt key is pressed.\n * @api\n */\nexport const altKeyOnly = function(mapBrowserEvent) {\n const originalEvent = mapBrowserEvent.originalEvent;\n return (\n originalEvent.altKey &&\n !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n !originalEvent.shiftKey);\n};\n\n\n/**\n * Return `true` if only the alt-key and shift-key is pressed, `false` otherwise\n * (e.g. when additionally the platform-modifier-key is pressed).\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the alt and shift keys are pressed.\n * @api\n */\nexport const altShiftKeysOnly = function(mapBrowserEvent) {\n const originalEvent = mapBrowserEvent.originalEvent;\n return (\n originalEvent.altKey &&\n !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n originalEvent.shiftKey);\n};\n\n\n/**\n * Return `true` if the map has the focus. This condition requires a map target\n * element with a `tabindex` attribute, e.g. `<div id=\"map\" tabindex=\"1\">`.\n *\n * @param {module:ol/MapBrowserEvent} event Map browser event.\n * @return {boolean} The map has the focus.\n * @api\n */\nexport const focus = function(event) {\n return event.target.getTargetElement() === document.activeElement;\n};\n\n\n/**\n * Return always true.\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} True.\n * @function\n * @api\n */\nexport const always = TRUE;\n\n\n/**\n * Return `true` if the event is a `click` event, `false` otherwise.\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `click` event.\n * @api\n */\nexport const click = function(mapBrowserEvent) {\n return mapBrowserEvent.type == MapBrowserEventType.CLICK;\n};\n\n\n/**\n * Return `true` if the event has an \"action\"-producing mouse button.\n *\n * By definition, this includes left-click on windows/linux, and left-click\n * without the ctrl key on Macs.\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} The result.\n */\nexport const mouseActionButton = function(mapBrowserEvent) {\n const originalEvent = mapBrowserEvent.originalEvent;\n return originalEvent.button == 0 &&\n !(WEBKIT && MAC && originalEvent.ctrlKey);\n};\n\n\n/**\n * Return always false.\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} False.\n * @function\n * @api\n */\nexport const never = FALSE;\n\n\n/**\n * Return `true` if the browser event is a `pointermove` event, `false`\n * otherwise.\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} True if the browser event is a `pointermove` event.\n * @api\n */\nexport const pointerMove = function(mapBrowserEvent) {\n return mapBrowserEvent.type == 'pointermove';\n};\n\n\n/**\n * Return `true` if the event is a map `singleclick` event, `false` otherwise.\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `singleclick` event.\n * @api\n */\nexport const singleClick = function(mapBrowserEvent) {\n return mapBrowserEvent.type == MapBrowserEventType.SINGLECLICK;\n};\n\n\n/**\n * Return `true` if the event is a map `dblclick` event, `false` otherwise.\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event is a map `dblclick` event.\n * @api\n */\nexport const doubleClick = function(mapBrowserEvent) {\n return mapBrowserEvent.type == MapBrowserEventType.DBLCLICK;\n};\n\n\n/**\n * Return `true` if no modifier key (alt-, shift- or platform-modifier-key) is\n * pressed.\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} True only if there no modifier keys are pressed.\n * @api\n */\nexport const noModifierKeys = function(mapBrowserEvent) {\n const originalEvent = mapBrowserEvent.originalEvent;\n return (\n !originalEvent.altKey &&\n !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n !originalEvent.shiftKey);\n};\n\n\n/**\n * Return `true` if only the platform-modifier-key (the meta-key on Mac,\n * ctrl-key otherwise) is pressed, `false` otherwise (e.g. when additionally\n * the shift-key is pressed).\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the platform modifier key is pressed.\n * @api\n */\nexport const platformModifierKeyOnly = function(mapBrowserEvent) {\n const originalEvent = mapBrowserEvent.originalEvent;\n return !originalEvent.altKey &&\n (MAC ? originalEvent.metaKey : originalEvent.ctrlKey) &&\n !originalEvent.shiftKey;\n};\n\n\n/**\n * Return `true` if only the shift-key is pressed, `false` otherwise (e.g. when\n * additionally the alt-key is pressed).\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} True if only the shift key is pressed.\n * @api\n */\nexport const shiftKeyOnly = function(mapBrowserEvent) {\n const originalEvent = mapBrowserEvent.originalEvent;\n return (\n !originalEvent.altKey &&\n !(originalEvent.metaKey || originalEvent.ctrlKey) &&\n originalEvent.shiftKey);\n};\n\n\n/**\n * Return `true` if the target element is not editable, i.e. not a `<input>`-,\n * `<select>`- or `<textarea>`-element, `false` otherwise.\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} True only if the target element is not editable.\n * @api\n */\nexport const targetNotEditable = function(mapBrowserEvent) {\n const target = mapBrowserEvent.originalEvent.target;\n const tagName = target.tagName;\n return (\n tagName !== 'INPUT' &&\n tagName !== 'SELECT' &&\n tagName !== 'TEXTAREA');\n};\n\n\n/**\n * Return `true` if the event originates from a mouse device.\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a mouse device.\n * @api\n */\nexport const mouseOnly = function(mapBrowserEvent) {\n assert(mapBrowserEvent.pointerEvent, 56); // mapBrowserEvent must originate from a pointer event\n // see http://www.w3.org/TR/pointerevents/#widl-PointerEvent-pointerType\n return (\n /** @type {module:ol/MapBrowserEvent} */ (mapBrowserEvent).pointerEvent.pointerType == 'mouse'\n );\n};\n\n\n/**\n * Return `true` if the event originates from a primary pointer in\n * contact with the surface or if the left mouse button is pressed.\n * @see http://www.w3.org/TR/pointerevents/#button-states\n *\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} True if the event originates from a primary pointer.\n * @api\n */\nexport const primaryAction = function(mapBrowserEvent) {\n const pointerEvent = mapBrowserEvent.pointerEvent;\n return pointerEvent.isPrimary && pointerEvent.button === 0;\n};\n","/**\n * @module ol/interaction/Pointer\n */\nimport {inherits} from '../util.js';\nimport {FALSE, UNDEFINED} from '../functions.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport MapBrowserPointerEvent from '../MapBrowserPointerEvent.js';\nimport Interaction from '../interaction/Interaction.js';\nimport {getValues} from '../obj.js';\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @this {module:ol/interaction/Pointer}\n */\nconst handleDragEvent = UNDEFINED;\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Capture dragging.\n * @this {module:ol/interaction/Pointer}\n */\nconst handleUpEvent = FALSE;\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Capture dragging.\n * @this {module:ol/interaction/Pointer}\n */\nconst handleDownEvent = FALSE;\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @this {module:ol/interaction/Pointer}\n */\nconst handleMoveEvent = UNDEFINED;\n\n\n/**\n * @typedef {Object} Options\n * @property {(function(module:ol/MapBrowserPointerEvent):boolean)} [handleDownEvent]\n * Function handling \"down\" events. If the function returns `true` then a drag\n * sequence is started.\n * @property {(function(module:ol/MapBrowserPointerEvent))} [handleDragEvent]\n * Function handling \"drag\" events. This function is called on \"move\" events\n * during a drag sequence.\n * @property {(function(module:ol/MapBrowserEvent):boolean)} [handleEvent]\n * Method called by the map to notify the interaction that a browser event was\n * dispatched to the map. The function may return `false` to prevent the\n * propagation of the event to other interactions in the map's interactions\n * chain.\n * @property {(function(module:ol/MapBrowserPointerEvent))} [handleMoveEvent]\n * Function handling \"move\" events. This function is called on \"move\" events,\n * also during a drag sequence (so during a drag sequence both the\n * `handleDragEvent` function and this function are called).\n * @property {(function(module:ol/MapBrowserPointerEvent):boolean)} [handleUpEvent]\n * Function handling \"up\" events. If the function returns `false` then the\n * current drag sequence is stopped.\n */\n\n\n/**\n * @classdesc\n * Base class that calls user-defined functions on `down`, `move` and `up`\n * events. This class also manages \"drag sequences\".\n *\n * When the `handleDownEvent` user function returns `true` a drag sequence is\n * started. During a drag sequence the `handleDragEvent` user function is\n * called on `move` events. The drag sequence ends when the `handleUpEvent`\n * user function is called and returns `false`.\n *\n * @constructor\n * @param {module:ol/interaction/Pointer~Options=} opt_options Options.\n * @extends {module:ol/interaction/Interaction}\n * @api\n */\nconst PointerInteraction = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n Interaction.call(this, {\n handleEvent: options.handleEvent || handleEvent\n });\n\n /**\n * @type {function(module:ol/MapBrowserPointerEvent):boolean}\n * @private\n */\n this.handleDownEvent_ = options.handleDownEvent ?\n options.handleDownEvent : handleDownEvent;\n\n /**\n * @type {function(module:ol/MapBrowserPointerEvent)}\n * @private\n */\n this.handleDragEvent_ = options.handleDragEvent ?\n options.handleDragEvent : handleDragEvent;\n\n /**\n * @type {function(module:ol/MapBrowserPointerEvent)}\n * @private\n */\n this.handleMoveEvent_ = options.handleMoveEvent ?\n options.handleMoveEvent : handleMoveEvent;\n\n /**\n * @type {function(module:ol/MapBrowserPointerEvent):boolean}\n * @private\n */\n this.handleUpEvent_ = options.handleUpEvent ?\n options.handleUpEvent : handleUpEvent;\n\n /**\n * @type {boolean}\n * @protected\n */\n this.handlingDownUpSequence = false;\n\n /**\n * @type {!Object.<string, module:ol/pointer/PointerEvent>}\n * @private\n */\n this.trackedPointers_ = {};\n\n /**\n * @type {Array.<module:ol/pointer/PointerEvent>}\n * @protected\n */\n this.targetPointers = [];\n\n};\n\ninherits(PointerInteraction, Interaction);\n\n\n/**\n * @param {Array.<module:ol/pointer/PointerEvent>} pointerEvents List of events.\n * @return {module:ol~Pixel} Centroid pixel.\n */\nexport function centroid(pointerEvents) {\n const length = pointerEvents.length;\n let clientX = 0;\n let clientY = 0;\n for (let i = 0; i < length; i++) {\n clientX += pointerEvents[i].clientX;\n clientY += pointerEvents[i].clientY;\n }\n return [clientX / length, clientY / length];\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Whether the event is a pointerdown, pointerdrag\n * or pointerup event.\n */\nfunction isPointerDraggingEvent(mapBrowserEvent) {\n const type = mapBrowserEvent.type;\n return type === MapBrowserEventType.POINTERDOWN ||\n type === MapBrowserEventType.POINTERDRAG ||\n type === MapBrowserEventType.POINTERUP;\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @private\n */\nPointerInteraction.prototype.updateTrackedPointers_ = function(mapBrowserEvent) {\n if (isPointerDraggingEvent(mapBrowserEvent)) {\n const event = mapBrowserEvent.pointerEvent;\n\n const id = event.pointerId.toString();\n if (mapBrowserEvent.type == MapBrowserEventType.POINTERUP) {\n delete this.trackedPointers_[id];\n } else if (mapBrowserEvent.type ==\n MapBrowserEventType.POINTERDOWN) {\n this.trackedPointers_[id] = event;\n } else if (id in this.trackedPointers_) {\n // update only when there was a pointerdown event for this pointer\n this.trackedPointers_[id] = event;\n }\n this.targetPointers = getValues(this.trackedPointers_);\n }\n};\n\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} and may call into\n * other functions, if event sequences like e.g. 'drag' or 'down-up' etc. are\n * detected.\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @this {module:ol/interaction/Pointer}\n * @api\n */\nexport function handleEvent(mapBrowserEvent) {\n if (!(mapBrowserEvent instanceof MapBrowserPointerEvent)) {\n return true;\n }\n\n let stopEvent = false;\n this.updateTrackedPointers_(mapBrowserEvent);\n if (this.handlingDownUpSequence) {\n if (mapBrowserEvent.type == MapBrowserEventType.POINTERDRAG) {\n this.handleDragEvent_(mapBrowserEvent);\n } else if (mapBrowserEvent.type == MapBrowserEventType.POINTERUP) {\n const handledUp = this.handleUpEvent_(mapBrowserEvent);\n this.handlingDownUpSequence = handledUp && this.targetPointers.length > 0;\n }\n } else {\n if (mapBrowserEvent.type == MapBrowserEventType.POINTERDOWN) {\n const handled = this.handleDownEvent_(mapBrowserEvent);\n this.handlingDownUpSequence = handled;\n stopEvent = this.shouldStopEvent(handled);\n } else if (mapBrowserEvent.type == MapBrowserEventType.POINTERMOVE) {\n this.handleMoveEvent_(mapBrowserEvent);\n }\n }\n return !stopEvent;\n}\n\n\n/**\n * This method is used to determine if \"down\" events should be propagated to\n * other interactions or should be stopped.\n *\n * The method receives the return code of the \"handleDownEvent\" function.\n *\n * By default this function is the \"identity\" function. It's overridden in\n * child classes.\n *\n * @param {boolean} handled Was the event handled by the interaction?\n * @return {boolean} Should the event be stopped?\n * @protected\n */\nPointerInteraction.prototype.shouldStopEvent = function(handled) {\n return handled;\n};\n\nexport default PointerInteraction;\n","/**\n * @module ol/interaction/DragPan\n */\nimport {inherits} from '../util.js';\nimport ViewHint from '../ViewHint.js';\nimport {scale as scaleCoordinate, rotate as rotateCoordinate, add as addCoordinate} from '../coordinate.js';\nimport {easeOut} from '../easing.js';\nimport {noModifierKeys} from '../events/condition.js';\nimport {FALSE} from '../functions.js';\nimport PointerInteraction, {centroid as centroidFromPointers} from '../interaction/Pointer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/events/condition~Condition} [condition] A function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition~noModifierKeys}.\n * @property {module:ol/Kinetic} [kinetic] Kinetic inertia to apply to the pan.\n */\n\n\n/**\n * @classdesc\n * Allows the user to pan the map by dragging the map.\n *\n * @constructor\n * @extends {module:ol/interaction/Pointer}\n * @param {module:ol/interaction/DragPan~Options=} opt_options Options.\n * @api\n */\nconst DragPan = function(opt_options) {\n\n PointerInteraction.call(this, {\n handleDownEvent: handleDownEvent,\n handleDragEvent: handleDragEvent,\n handleUpEvent: handleUpEvent\n });\n\n const options = opt_options ? opt_options : {};\n\n /**\n * @private\n * @type {module:ol/Kinetic|undefined}\n */\n this.kinetic_ = options.kinetic;\n\n /**\n * @type {module:ol~Pixel}\n */\n this.lastCentroid = null;\n\n /**\n * @type {number}\n */\n this.lastPointersCount_;\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.condition_ = options.condition ? options.condition : noModifierKeys;\n\n /**\n * @private\n * @type {boolean}\n */\n this.noKinetic_ = false;\n\n};\n\ninherits(DragPan, PointerInteraction);\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @this {module:ol/interaction/DragPan}\n */\nfunction handleDragEvent(mapBrowserEvent) {\n const targetPointers = this.targetPointers;\n const centroid = centroidFromPointers(targetPointers);\n if (targetPointers.length == this.lastPointersCount_) {\n if (this.kinetic_) {\n this.kinetic_.update(centroid[0], centroid[1]);\n }\n if (this.lastCentroid) {\n const deltaX = this.lastCentroid[0] - centroid[0];\n const deltaY = centroid[1] - this.lastCentroid[1];\n const map = mapBrowserEvent.map;\n const view = map.getView();\n let center = [deltaX, deltaY];\n scaleCoordinate(center, view.getResolution());\n rotateCoordinate(center, view.getRotation());\n addCoordinate(center, view.getCenter());\n center = view.constrainCenter(center);\n view.setCenter(center);\n }\n } else if (this.kinetic_) {\n // reset so we don't overestimate the kinetic energy after\n // after one finger down, tiny drag, second finger down\n this.kinetic_.begin();\n }\n this.lastCentroid = centroid;\n this.lastPointersCount_ = targetPointers.length;\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Stop drag sequence?\n * @this {module:ol/interaction/DragPan}\n */\nfunction handleUpEvent(mapBrowserEvent) {\n const map = mapBrowserEvent.map;\n const view = map.getView();\n if (this.targetPointers.length === 0) {\n if (!this.noKinetic_ && this.kinetic_ && this.kinetic_.end()) {\n const distance = this.kinetic_.getDistance();\n const angle = this.kinetic_.getAngle();\n const center = /** @type {!module:ol/coordinate~Coordinate} */ (view.getCenter());\n const centerpx = map.getPixelFromCoordinate(center);\n const dest = map.getCoordinateFromPixel([\n centerpx[0] - distance * Math.cos(angle),\n centerpx[1] - distance * Math.sin(angle)\n ]);\n view.animate({\n center: view.constrainCenter(dest),\n duration: 500,\n easing: easeOut\n });\n }\n view.setHint(ViewHint.INTERACTING, -1);\n return false;\n } else {\n if (this.kinetic_) {\n // reset so we don't overestimate the kinetic energy after\n // after one finger up, tiny drag, second finger up\n this.kinetic_.begin();\n }\n this.lastCentroid = null;\n return true;\n }\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Start drag sequence?\n * @this {module:ol/interaction/DragPan}\n */\nfunction handleDownEvent(mapBrowserEvent) {\n if (this.targetPointers.length > 0 && this.condition_(mapBrowserEvent)) {\n const map = mapBrowserEvent.map;\n const view = map.getView();\n this.lastCentroid = null;\n if (!this.handlingDownUpSequence) {\n view.setHint(ViewHint.INTERACTING, 1);\n }\n // stop any current animation\n if (view.getAnimating()) {\n view.setCenter(mapBrowserEvent.frameState.viewState.center);\n }\n if (this.kinetic_) {\n this.kinetic_.begin();\n }\n // No kinetic as soon as more than one pointer on the screen is\n // detected. This is to prevent nasty pans after pinch.\n this.noKinetic_ = this.targetPointers.length > 1;\n return true;\n } else {\n return false;\n }\n}\n\n\n/**\n * @inheritDoc\n */\nDragPan.prototype.shouldStopEvent = FALSE;\nexport default DragPan;\n","/**\n * @module ol/interaction/DragRotate\n */\nimport {inherits} from '../util.js';\nimport {disable} from '../rotationconstraint.js';\nimport ViewHint from '../ViewHint.js';\nimport {altShiftKeysOnly, mouseOnly, mouseActionButton} from '../events/condition.js';\nimport {FALSE} from '../functions.js';\nimport {rotate, rotateWithoutConstraints} from '../interaction/Interaction.js';\nimport PointerInteraction from '../interaction/Pointer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/events/condition~Condition} [condition] A function that takes an\n * {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition~altShiftKeysOnly}.\n * @property {number} [duration=250] Animation duration in milliseconds.\n */\n\n\n/**\n * @classdesc\n * Allows the user to rotate the map by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when the alt and shift keys are held down.\n *\n * This interaction is only supported for mouse devices.\n *\n * @constructor\n * @extends {module:ol/interaction/Pointer}\n * @param {module:ol/interaction/DragRotate~Options=} opt_options Options.\n * @api\n */\nconst DragRotate = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n PointerInteraction.call(this, {\n handleDownEvent: handleDownEvent,\n handleDragEvent: handleDragEvent,\n handleUpEvent: handleUpEvent\n });\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.condition_ = options.condition ? options.condition : altShiftKeysOnly;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.lastAngle_ = undefined;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 250;\n};\n\ninherits(DragRotate, PointerInteraction);\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @this {module:ol/interaction/DragRotate}\n */\nfunction handleDragEvent(mapBrowserEvent) {\n if (!mouseOnly(mapBrowserEvent)) {\n return;\n }\n\n const map = mapBrowserEvent.map;\n const view = map.getView();\n if (view.getConstraints().rotation === disable) {\n return;\n }\n const size = map.getSize();\n const offset = mapBrowserEvent.pixel;\n const theta =\n Math.atan2(size[1] / 2 - offset[1], offset[0] - size[0] / 2);\n if (this.lastAngle_ !== undefined) {\n const delta = theta - this.lastAngle_;\n const rotation = view.getRotation();\n rotateWithoutConstraints(view, rotation - delta);\n }\n this.lastAngle_ = theta;\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Stop drag sequence?\n * @this {module:ol/interaction/DragRotate}\n */\nfunction handleUpEvent(mapBrowserEvent) {\n if (!mouseOnly(mapBrowserEvent)) {\n return true;\n }\n\n const map = mapBrowserEvent.map;\n const view = map.getView();\n view.setHint(ViewHint.INTERACTING, -1);\n const rotation = view.getRotation();\n rotate(view, rotation, undefined, this.duration_);\n return false;\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Start drag sequence?\n * @this {module:ol/interaction/DragRotate}\n */\nfunction handleDownEvent(mapBrowserEvent) {\n if (!mouseOnly(mapBrowserEvent)) {\n return false;\n }\n\n if (mouseActionButton(mapBrowserEvent) && this.condition_(mapBrowserEvent)) {\n const map = mapBrowserEvent.map;\n map.getView().setHint(ViewHint.INTERACTING, 1);\n this.lastAngle_ = undefined;\n return true;\n } else {\n return false;\n }\n}\n\n\n/**\n * @inheritDoc\n */\nDragRotate.prototype.shouldStopEvent = FALSE;\nexport default DragRotate;\n","/**\n * @module ol/render/Box\n */\n// FIXME add rotation\n\nimport {inherits} from '../util.js';\nimport Disposable from '../Disposable.js';\nimport Polygon from '../geom/Polygon.js';\n\n/**\n * @constructor\n * @extends {module:ol/Disposable}\n * @param {string} className CSS class name.\n */\nconst RenderBox = function(className) {\n\n /**\n * @type {module:ol/geom/Polygon}\n * @private\n */\n this.geometry_ = null;\n\n /**\n * @type {HTMLDivElement}\n * @private\n */\n this.element_ = /** @type {HTMLDivElement} */ (document.createElement('div'));\n this.element_.style.position = 'absolute';\n this.element_.className = 'ol-box ' + className;\n\n /**\n * @private\n * @type {module:ol/PluggableMap}\n */\n this.map_ = null;\n\n /**\n * @private\n * @type {module:ol~Pixel}\n */\n this.startPixel_ = null;\n\n /**\n * @private\n * @type {module:ol~Pixel}\n */\n this.endPixel_ = null;\n\n};\n\ninherits(RenderBox, Disposable);\n\n\n/**\n * @inheritDoc\n */\nRenderBox.prototype.disposeInternal = function() {\n this.setMap(null);\n};\n\n\n/**\n * @private\n */\nRenderBox.prototype.render_ = function() {\n const startPixel = this.startPixel_;\n const endPixel = this.endPixel_;\n const px = 'px';\n const style = this.element_.style;\n style.left = Math.min(startPixel[0], endPixel[0]) + px;\n style.top = Math.min(startPixel[1], endPixel[1]) + px;\n style.width = Math.abs(endPixel[0] - startPixel[0]) + px;\n style.height = Math.abs(endPixel[1] - startPixel[1]) + px;\n};\n\n\n/**\n * @param {module:ol/PluggableMap} map Map.\n */\nRenderBox.prototype.setMap = function(map) {\n if (this.map_) {\n this.map_.getOverlayContainer().removeChild(this.element_);\n const style = this.element_.style;\n style.left = style.top = style.width = style.height = 'inherit';\n }\n this.map_ = map;\n if (this.map_) {\n this.map_.getOverlayContainer().appendChild(this.element_);\n }\n};\n\n\n/**\n * @param {module:ol~Pixel} startPixel Start pixel.\n * @param {module:ol~Pixel} endPixel End pixel.\n */\nRenderBox.prototype.setPixels = function(startPixel, endPixel) {\n this.startPixel_ = startPixel;\n this.endPixel_ = endPixel;\n this.createOrUpdateGeometry();\n this.render_();\n};\n\n\n/**\n * Creates or updates the cached geometry.\n */\nRenderBox.prototype.createOrUpdateGeometry = function() {\n const startPixel = this.startPixel_;\n const endPixel = this.endPixel_;\n const pixels = [\n startPixel,\n [startPixel[0], endPixel[1]],\n endPixel,\n [endPixel[0], startPixel[1]]\n ];\n const coordinates = pixels.map(this.map_.getCoordinateFromPixel, this.map_);\n // close the polygon\n coordinates[4] = coordinates[0].slice();\n if (!this.geometry_) {\n this.geometry_ = new Polygon([coordinates]);\n } else {\n this.geometry_.setCoordinates([coordinates]);\n }\n};\n\n\n/**\n * @return {module:ol/geom/Polygon} Geometry.\n */\nRenderBox.prototype.getGeometry = function() {\n return this.geometry_;\n};\nexport default RenderBox;\n","/**\n * @module ol/interaction/DragBox\n */\n// FIXME draw drag box\nimport Event from '../events/Event.js';\nimport {inherits} from '../util.js';\nimport {always, mouseOnly, mouseActionButton} from '../events/condition.js';\nimport {UNDEFINED} from '../functions.js';\nimport PointerInteraction from '../interaction/Pointer.js';\nimport RenderBox from '../render/Box.js';\n\n\n/**\n * A function that takes a {@link module:ol/MapBrowserEvent} and two\n * {@link module:ol~Pixel}s and returns a `{boolean}`. If the condition is met,\n * true should be returned.\n * @typedef {function(this: ?, module:ol/MapBrowserEvent, module:ol~Pixel, module:ol~Pixel):boolean} EndCondition\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-dragbox'] CSS class name for styling the box.\n * @property {module:ol/events/condition~Condition} [condition] A function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a boolean\n * to indicate whether that event should be handled.\n * Default is {@link ol/events/condition~always}.\n * @property {number} [minArea=64] The minimum area of the box in pixel, this value is used by the default\n * `boxEndCondition` function.\n * @property {module:ol/interaction/DragBox~EndCondition} [boxEndCondition] A function that takes a {@link module:ol/MapBrowserEvent~MapBrowserEvent} and two\n * {@link module:ol~Pixel}s to indicate whether a `boxend` event should be fired.\n * Default is `true` if the area of the box is bigger than the `minArea` option.\n */\n\n\n/**\n * @enum {string}\n */\nconst DragBoxEventType = {\n /**\n * Triggered upon drag box start.\n * @event module:ol/interaction/DragBox~DragBoxEvent#boxstart\n * @api\n */\n BOXSTART: 'boxstart',\n\n /**\n * Triggered on drag when box is active.\n * @event module:ol/interaction/DragBox~DragBoxEvent#boxdrag\n * @api\n */\n BOXDRAG: 'boxdrag',\n\n /**\n * Triggered upon drag box end.\n * @event module:ol/interaction/DragBox~DragBoxEvent#boxend\n * @api\n */\n BOXEND: 'boxend'\n};\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/DragBox~DragBox} instances are instances of\n * this type.\n *\n * @param {string} type The event type.\n * @param {module:ol/coordinate~Coordinate} coordinate The event coordinate.\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Originating event.\n * @extends {module:ol/events/Event}\n * @constructor\n */\nconst DragBoxEvent = function(type, coordinate, mapBrowserEvent) {\n Event.call(this, type);\n\n /**\n * The coordinate of the drag event.\n * @const\n * @type {module:ol/coordinate~Coordinate}\n * @api\n */\n this.coordinate = coordinate;\n\n /**\n * @const\n * @type {module:ol/MapBrowserEvent}\n * @api\n */\n this.mapBrowserEvent = mapBrowserEvent;\n\n};\n\ninherits(DragBoxEvent, Event);\n\n\n/**\n * @classdesc\n * Allows the user to draw a vector box by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when the shift or other key is held down. This is used, for example,\n * for zooming to a specific area of the map\n * (see {@link module:ol/interaction/DragZoom~DragZoom} and\n * {@link module:ol/interaction/DragRotateAndZoom}).\n *\n * This interaction is only supported for mouse devices.\n *\n * @constructor\n * @extends {module:ol/interaction/Pointer}\n * @fires module:ol/interaction/DragBox~DragBoxEvent\n * @param {module:ol/interaction/DragBox~Options=} opt_options Options.\n * @api\n */\nconst DragBox = function(opt_options) {\n\n PointerInteraction.call(this, {\n handleDownEvent: handleDownEvent,\n handleDragEvent: handleDragEvent,\n handleUpEvent: handleUpEvent\n });\n\n const options = opt_options ? opt_options : {};\n\n /**\n * @type {module:ol/render/Box}\n * @private\n */\n this.box_ = new RenderBox(options.className || 'ol-dragbox');\n\n /**\n * @type {number}\n * @private\n */\n this.minArea_ = options.minArea !== undefined ? options.minArea : 64;\n\n /**\n * @type {module:ol~Pixel}\n * @private\n */\n this.startPixel_ = null;\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.condition_ = options.condition ? options.condition : always;\n\n /**\n * @private\n * @type {module:ol/interaction/DragBox~EndCondition}\n */\n this.boxEndCondition_ = options.boxEndCondition ?\n options.boxEndCondition : defaultBoxEndCondition;\n};\n\ninherits(DragBox, PointerInteraction);\n\n\n/**\n * The default condition for determining whether the boxend event\n * should fire.\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent The originating MapBrowserEvent\n * leading to the box end.\n * @param {module:ol~Pixel} startPixel The starting pixel of the box.\n * @param {module:ol~Pixel} endPixel The end pixel of the box.\n * @return {boolean} Whether or not the boxend condition should be fired.\n * @this {module:ol/interaction/DragBox}\n */\nfunction defaultBoxEndCondition(mapBrowserEvent, startPixel, endPixel) {\n const width = endPixel[0] - startPixel[0];\n const height = endPixel[1] - startPixel[1];\n return width * width + height * height >= this.minArea_;\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @this {module:ol/interaction/DragBox}\n */\nfunction handleDragEvent(mapBrowserEvent) {\n if (!mouseOnly(mapBrowserEvent)) {\n return;\n }\n\n this.box_.setPixels(this.startPixel_, mapBrowserEvent.pixel);\n\n this.dispatchEvent(new DragBoxEvent(DragBoxEventType.BOXDRAG,\n mapBrowserEvent.coordinate, mapBrowserEvent));\n}\n\n\n/**\n * Returns geometry of last drawn box.\n * @return {module:ol/geom/Polygon} Geometry.\n * @api\n */\nDragBox.prototype.getGeometry = function() {\n return this.box_.getGeometry();\n};\n\n\n/**\n * To be overridden by child classes.\n * FIXME: use constructor option instead of relying on overriding.\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @protected\n */\nDragBox.prototype.onBoxEnd = UNDEFINED;\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Stop drag sequence?\n * @this {module:ol/interaction/DragBox}\n */\nfunction handleUpEvent(mapBrowserEvent) {\n if (!mouseOnly(mapBrowserEvent)) {\n return true;\n }\n\n this.box_.setMap(null);\n\n if (this.boxEndCondition_(mapBrowserEvent,\n this.startPixel_, mapBrowserEvent.pixel)) {\n this.onBoxEnd(mapBrowserEvent);\n this.dispatchEvent(new DragBoxEvent(DragBoxEventType.BOXEND,\n mapBrowserEvent.coordinate, mapBrowserEvent));\n }\n return false;\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Start drag sequence?\n * @this {module:ol/interaction/DragBox}\n */\nfunction handleDownEvent(mapBrowserEvent) {\n if (!mouseOnly(mapBrowserEvent)) {\n return false;\n }\n\n if (mouseActionButton(mapBrowserEvent) &&\n this.condition_(mapBrowserEvent)) {\n this.startPixel_ = mapBrowserEvent.pixel;\n this.box_.setMap(mapBrowserEvent.map);\n this.box_.setPixels(this.startPixel_, this.startPixel_);\n this.dispatchEvent(new DragBoxEvent(DragBoxEventType.BOXSTART,\n mapBrowserEvent.coordinate, mapBrowserEvent));\n return true;\n } else {\n return false;\n }\n}\n\n\nexport default DragBox;\n","/**\n * @module ol/interaction/DragZoom\n */\nimport {inherits} from '../util.js';\nimport {easeOut} from '../easing.js';\nimport {shiftKeyOnly} from '../events/condition.js';\nimport {createOrUpdateFromCoordinates, getBottomLeft, getCenter, getTopRight, scaleFromCenter} from '../extent.js';\nimport DragBox from '../interaction/DragBox.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-dragzoom'] CSS class name for styling the\n * box.\n * @property {module:ol/events/condition~Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition~shiftKeyOnly}.\n * @property {number} [duration=200] Animation duration in milliseconds.\n * @property {boolean} [out=false] Use interaction for zooming out.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom the map by clicking and dragging on the map,\n * normally combined with an {@link module:ol/events/condition} that limits\n * it to when a key, shift by default, is held down.\n *\n * To change the style of the box, use CSS and the `.ol-dragzoom` selector, or\n * your custom one configured with `className`.\n *\n * @constructor\n * @extends {module:ol/interaction/DragBox}\n * @param {module:ol/interaction/DragZoom~Options=} opt_options Options.\n * @api\n */\nconst DragZoom = function(opt_options) {\n const options = opt_options ? opt_options : {};\n\n const condition = options.condition ? options.condition : shiftKeyOnly;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 200;\n\n /**\n * @private\n * @type {boolean}\n */\n this.out_ = options.out !== undefined ? options.out : false;\n\n DragBox.call(this, {\n condition: condition,\n className: options.className || 'ol-dragzoom'\n });\n\n};\n\ninherits(DragZoom, DragBox);\n\n\n/**\n * @inheritDoc\n */\nDragZoom.prototype.onBoxEnd = function() {\n const map = this.getMap();\n\n const view = /** @type {!module:ol/View} */ (map.getView());\n\n const size = /** @type {!module:ol/size~Size} */ (map.getSize());\n\n let extent = this.getGeometry().getExtent();\n\n if (this.out_) {\n const mapExtent = view.calculateExtent(size);\n const boxPixelExtent = createOrUpdateFromCoordinates([\n map.getPixelFromCoordinate(getBottomLeft(extent)),\n map.getPixelFromCoordinate(getTopRight(extent))]);\n const factor = view.getResolutionForExtent(boxPixelExtent, size);\n\n scaleFromCenter(mapExtent, 1 / factor);\n extent = mapExtent;\n }\n\n const resolution = view.constrainResolution(\n view.getResolutionForExtent(extent, size));\n\n let center = getCenter(extent);\n center = view.constrainCenter(center);\n\n view.animate({\n resolution: resolution,\n center: center,\n duration: this.duration_,\n easing: easeOut\n });\n\n};\nexport default DragZoom;\n","/**\n * @module ol/events/KeyCode\n */\n\n/**\n * @enum {number}\n * @const\n */\nexport default {\n LEFT: 37,\n UP: 38,\n RIGHT: 39,\n DOWN: 40\n};\n","/**\n * @module ol/interaction/KeyboardPan\n */\nimport {inherits} from '../util.js';\nimport {rotate as rotateCoordinate} from '../coordinate.js';\nimport EventType from '../events/EventType.js';\nimport KeyCode from '../events/KeyCode.js';\nimport {noModifierKeys, targetNotEditable} from '../events/condition.js';\nimport Interaction, {pan} from '../interaction/Interaction.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/events/condition~Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition~noModifierKeys} and\n * {@link module:ol/events/condition~targetNotEditable}.\n * @property {number} [duration=100] Animation duration in milliseconds.\n * @property {number} [pixelDelta=128] The amount of pixels to pan on each key\n * press.\n */\n\n\n/**\n * @classdesc\n * Allows the user to pan the map using keyboard arrows.\n * Note that, although this interaction is by default included in maps,\n * the keys can only be used when browser focus is on the element to which\n * the keyboard events are attached. By default, this is the map div,\n * though you can change this with the `keyboardEventTarget` in\n * {@link module:ol/Map~Map}. `document` never loses focus but, for any other\n * element, focus will have to be on, and returned to, this element if the keys\n * are to function.\n * See also {@link module:ol/interaction/KeyboardZoom~KeyboardZoom}.\n *\n * @constructor\n * @extends {module:ol/interaction/Interaction}\n * @param {module:ol/interaction/KeyboardPan~Options=} opt_options Options.\n * @api\n */\nconst KeyboardPan = function(opt_options) {\n\n Interaction.call(this, {\n handleEvent: handleEvent\n });\n\n const options = opt_options || {};\n\n /**\n * @private\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Browser event.\n * @return {boolean} Combined condition result.\n */\n this.defaultCondition_ = function(mapBrowserEvent) {\n return noModifierKeys(mapBrowserEvent) &&\n targetNotEditable(mapBrowserEvent);\n };\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.condition_ = options.condition !== undefined ?\n options.condition : this.defaultCondition_;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 100;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelDelta_ = options.pixelDelta !== undefined ?\n options.pixelDelta : 128;\n\n};\n\ninherits(KeyboardPan, Interaction);\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} if it was a\n * `KeyEvent`, and decides the direction to pan to (if an arrow key was\n * pressed).\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @this {module:ol/interaction/KeyboardPan}\n */\nfunction handleEvent(mapBrowserEvent) {\n let stopEvent = false;\n if (mapBrowserEvent.type == EventType.KEYDOWN) {\n const keyEvent = mapBrowserEvent.originalEvent;\n const keyCode = keyEvent.keyCode;\n if (this.condition_(mapBrowserEvent) &&\n (keyCode == KeyCode.DOWN ||\n keyCode == KeyCode.LEFT ||\n keyCode == KeyCode.RIGHT ||\n keyCode == KeyCode.UP)) {\n const map = mapBrowserEvent.map;\n const view = map.getView();\n const mapUnitsDelta = view.getResolution() * this.pixelDelta_;\n let deltaX = 0, deltaY = 0;\n if (keyCode == KeyCode.DOWN) {\n deltaY = -mapUnitsDelta;\n } else if (keyCode == KeyCode.LEFT) {\n deltaX = -mapUnitsDelta;\n } else if (keyCode == KeyCode.RIGHT) {\n deltaX = mapUnitsDelta;\n } else {\n deltaY = mapUnitsDelta;\n }\n const delta = [deltaX, deltaY];\n rotateCoordinate(delta, view.getRotation());\n pan(view, delta, this.duration_);\n mapBrowserEvent.preventDefault();\n stopEvent = true;\n }\n }\n return !stopEvent;\n}\n\nexport default KeyboardPan;\n","/**\n * @module ol/interaction/KeyboardZoom\n */\nimport {inherits} from '../util.js';\nimport EventType from '../events/EventType.js';\nimport {targetNotEditable} from '../events/condition.js';\nimport Interaction, {zoomByDelta} from '../interaction/Interaction.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=100] Animation duration in milliseconds.\n * @property {module:ol/events/condition~Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition~targetNotEditable}.\n * @property {number} [delta=1] The zoom level delta on each key press.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom the map using keyboard + and -.\n * Note that, although this interaction is by default included in maps,\n * the keys can only be used when browser focus is on the element to which\n * the keyboard events are attached. By default, this is the map div,\n * though you can change this with the `keyboardEventTarget` in\n * {@link module:ol/Map~Map}. `document` never loses focus but, for any other\n * element, focus will have to be on, and returned to, this element if the keys\n * are to function.\n * See also {@link moudle:ol/interaction/KeyboardPan~KeyboardPan}.\n *\n * @constructor\n * @param {module:ol/interaction/KeyboardZoom~Options=} opt_options Options.\n * @extends {module:ol/interaction/Interaction}\n * @api\n */\nconst KeyboardZoom = function(opt_options) {\n\n Interaction.call(this, {\n handleEvent: handleEvent\n });\n\n const options = opt_options ? opt_options : {};\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.condition_ = options.condition ? options.condition : targetNotEditable;\n\n /**\n * @private\n * @type {number}\n */\n this.delta_ = options.delta ? options.delta : 1;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 100;\n\n};\n\ninherits(KeyboardZoom, Interaction);\n\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} if it was a\n * `KeyEvent`, and decides whether to zoom in or out (depending on whether the\n * key pressed was '+' or '-').\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @this {module:ol/interaction/KeyboardZoom}\n */\nfunction handleEvent(mapBrowserEvent) {\n let stopEvent = false;\n if (mapBrowserEvent.type == EventType.KEYDOWN ||\n mapBrowserEvent.type == EventType.KEYPRESS) {\n const keyEvent = mapBrowserEvent.originalEvent;\n const charCode = keyEvent.charCode;\n if (this.condition_(mapBrowserEvent) &&\n (charCode == '+'.charCodeAt(0) || charCode == '-'.charCodeAt(0))) {\n const map = mapBrowserEvent.map;\n const delta = (charCode == '+'.charCodeAt(0)) ? this.delta_ : -this.delta_;\n const view = map.getView();\n zoomByDelta(view, delta, undefined, this.duration_);\n mapBrowserEvent.preventDefault();\n stopEvent = true;\n }\n }\n return !stopEvent;\n}\n\nexport default KeyboardZoom;\n","/**\n * @module ol/interaction/MouseWheelZoom\n */\nimport {inherits} from '../util.js';\nimport ViewHint from '../ViewHint.js';\nimport {always} from '../events/condition.js';\nimport {easeOut} from '../easing.js';\nimport EventType from '../events/EventType.js';\nimport {DEVICE_PIXEL_RATIO, FIREFOX, SAFARI} from '../has.js';\nimport Interaction, {zoomByDelta} from '../interaction/Interaction.js';\nimport {clamp} from '../math.js';\n\n\n/**\n * Maximum mouse wheel delta.\n * @type {number}\n */\nconst MAX_DELTA = 1;\n\n\n/**\n * @enum {string}\n */\nexport const Mode = {\n TRACKPAD: 'trackpad',\n WHEEL: 'wheel'\n};\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/events/condition~Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. Default is\n * {@link module:ol/events/condition~always}.\n * @property {number} [duration=250] Animation duration in milliseconds.\n * @property {number} [timeout=80] Mouse wheel timeout duration in milliseconds.\n * @property {boolean} [constrainResolution=false] When using a trackpad or\n * magic mouse, zoom to the closest integer zoom level after the scroll gesture\n * ends.\n * @property {boolean} [useAnchor=true] Enable zooming using the mouse's\n * location as the anchor. When set to `false`, zooming in and out will zoom to\n * the center of the screen instead of zooming on the mouse's location.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom the map by scrolling the mouse wheel.\n *\n * @constructor\n * @extends {module:ol/interaction/Interaction}\n * @param {module:ol/interaction/MouseWheelZoom~Options=} opt_options Options.\n * @api\n */\nconst MouseWheelZoom = function(opt_options) {\n\n Interaction.call(this, {\n handleEvent: handleEvent\n });\n\n const options = opt_options || {};\n\n /**\n * @private\n * @type {number}\n */\n this.delta_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n /**\n * @private\n * @type {number}\n */\n this.timeout_ = options.timeout !== undefined ? options.timeout : 80;\n\n /**\n * @private\n * @type {boolean}\n */\n this.useAnchor_ = options.useAnchor !== undefined ? options.useAnchor : true;\n\n /**\n * @private\n * @type {boolean}\n */\n this.constrainResolution_ = options.constrainResolution || false;\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.condition_ = options.condition ? options.condition : always;\n\n /**\n * @private\n * @type {?module:ol/coordinate~Coordinate}\n */\n this.lastAnchor_ = null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.startTime_ = undefined;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.timeoutId_ = undefined;\n\n /**\n * @private\n * @type {module:ol/interaction/MouseWheelZoom~Mode|undefined}\n */\n this.mode_ = undefined;\n\n /**\n * Trackpad events separated by this delay will be considered separate\n * interactions.\n * @type {number}\n */\n this.trackpadEventGap_ = 400;\n\n /**\n * @type {number|undefined}\n */\n this.trackpadTimeoutId_ = undefined;\n\n /**\n * The number of delta values per zoom level\n * @private\n * @type {number}\n */\n this.trackpadDeltaPerZoom_ = 300;\n\n /**\n * The zoom factor by which scroll zooming is allowed to exceed the limits.\n * @private\n * @type {number}\n */\n this.trackpadZoomBuffer_ = 1.5;\n\n};\n\ninherits(MouseWheelZoom, Interaction);\n\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} (if it was a\n * mousewheel-event) and eventually zooms the map.\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} Allow event propagation.\n * @this {module:ol/interaction/MouseWheelZoom}\n */\nfunction handleEvent(mapBrowserEvent) {\n if (!this.condition_(mapBrowserEvent)) {\n return true;\n }\n const type = mapBrowserEvent.type;\n if (type !== EventType.WHEEL && type !== EventType.MOUSEWHEEL) {\n return true;\n }\n\n mapBrowserEvent.preventDefault();\n\n const map = mapBrowserEvent.map;\n const wheelEvent = /** @type {WheelEvent} */ (mapBrowserEvent.originalEvent);\n\n if (this.useAnchor_) {\n this.lastAnchor_ = mapBrowserEvent.coordinate;\n }\n\n // Delta normalisation inspired by\n // https://github.com/mapbox/mapbox-gl-js/blob/001c7b9/js/ui/handler/scroll_zoom.js\n let delta;\n if (mapBrowserEvent.type == EventType.WHEEL) {\n delta = wheelEvent.deltaY;\n if (FIREFOX &&\n wheelEvent.deltaMode === WheelEvent.DOM_DELTA_PIXEL) {\n delta /= DEVICE_PIXEL_RATIO;\n }\n if (wheelEvent.deltaMode === WheelEvent.DOM_DELTA_LINE) {\n delta *= 40;\n }\n } else if (mapBrowserEvent.type == EventType.MOUSEWHEEL) {\n delta = -wheelEvent.wheelDeltaY;\n if (SAFARI) {\n delta /= 3;\n }\n }\n\n if (delta === 0) {\n return false;\n }\n\n const now = Date.now();\n\n if (this.startTime_ === undefined) {\n this.startTime_ = now;\n }\n\n if (!this.mode_ || now - this.startTime_ > this.trackpadEventGap_) {\n this.mode_ = Math.abs(delta) < 4 ?\n Mode.TRACKPAD :\n Mode.WHEEL;\n }\n\n if (this.mode_ === Mode.TRACKPAD) {\n const view = map.getView();\n if (this.trackpadTimeoutId_) {\n clearTimeout(this.trackpadTimeoutId_);\n } else {\n view.setHint(ViewHint.INTERACTING, 1);\n }\n this.trackpadTimeoutId_ = setTimeout(this.decrementInteractingHint_.bind(this), this.trackpadEventGap_);\n let resolution = view.getResolution() * Math.pow(2, delta / this.trackpadDeltaPerZoom_);\n const minResolution = view.getMinResolution();\n const maxResolution = view.getMaxResolution();\n let rebound = 0;\n if (resolution < minResolution) {\n resolution = Math.max(resolution, minResolution / this.trackpadZoomBuffer_);\n rebound = 1;\n } else if (resolution > maxResolution) {\n resolution = Math.min(resolution, maxResolution * this.trackpadZoomBuffer_);\n rebound = -1;\n }\n if (this.lastAnchor_) {\n const center = view.calculateCenterZoom(resolution, this.lastAnchor_);\n view.setCenter(view.constrainCenter(center));\n }\n view.setResolution(resolution);\n\n if (rebound === 0 && this.constrainResolution_) {\n view.animate({\n resolution: view.constrainResolution(resolution, delta > 0 ? -1 : 1),\n easing: easeOut,\n anchor: this.lastAnchor_,\n duration: this.duration_\n });\n }\n\n if (rebound > 0) {\n view.animate({\n resolution: minResolution,\n easing: easeOut,\n anchor: this.lastAnchor_,\n duration: 500\n });\n } else if (rebound < 0) {\n view.animate({\n resolution: maxResolution,\n easing: easeOut,\n anchor: this.lastAnchor_,\n duration: 500\n });\n }\n this.startTime_ = now;\n return false;\n }\n\n this.delta_ += delta;\n\n const timeLeft = Math.max(this.timeout_ - (now - this.startTime_), 0);\n\n clearTimeout(this.timeoutId_);\n this.timeoutId_ = setTimeout(this.handleWheelZoom_.bind(this, map), timeLeft);\n\n return false;\n}\n\n\n/**\n * @private\n */\nMouseWheelZoom.prototype.decrementInteractingHint_ = function() {\n this.trackpadTimeoutId_ = undefined;\n const view = this.getMap().getView();\n view.setHint(ViewHint.INTERACTING, -1);\n};\n\n\n/**\n * @private\n * @param {module:ol/PluggableMap} map Map.\n */\nMouseWheelZoom.prototype.handleWheelZoom_ = function(map) {\n const view = map.getView();\n if (view.getAnimating()) {\n view.cancelAnimations();\n }\n const maxDelta = MAX_DELTA;\n const delta = clamp(this.delta_, -maxDelta, maxDelta);\n zoomByDelta(view, -delta, this.lastAnchor_, this.duration_);\n this.mode_ = undefined;\n this.delta_ = 0;\n this.lastAnchor_ = null;\n this.startTime_ = undefined;\n this.timeoutId_ = undefined;\n};\n\n\n/**\n * Enable or disable using the mouse's location as an anchor when zooming\n * @param {boolean} useAnchor true to zoom to the mouse's location, false\n * to zoom to the center of the map\n * @api\n */\nMouseWheelZoom.prototype.setMouseAnchor = function(useAnchor) {\n this.useAnchor_ = useAnchor;\n if (!useAnchor) {\n this.lastAnchor_ = null;\n }\n};\n\n\nexport default MouseWheelZoom;\n","/**\n * @module ol/interaction/PinchRotate\n */\nimport {inherits} from '../util.js';\nimport ViewHint from '../ViewHint.js';\nimport {FALSE} from '../functions.js';\nimport {rotate, rotateWithoutConstraints} from '../interaction/Interaction.js';\nimport PointerInteraction, {centroid as centroidFromPointers} from '../interaction/Pointer.js';\nimport {disable} from '../rotationconstraint.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=250] The duration of the animation in\n * milliseconds.\n * @property {number} [threshold=0.3] Minimal angle in radians to start a rotation.\n */\n\n\n/**\n * @classdesc\n * Allows the user to rotate the map by twisting with two fingers\n * on a touch screen.\n *\n * @constructor\n * @extends {module:ol/interaction/Pointer}\n * @param {module:ol/interaction/PinchRotate~Options=} opt_options Options.\n * @api\n */\nconst PinchRotate = function(opt_options) {\n\n PointerInteraction.call(this, {\n handleDownEvent: handleDownEvent,\n handleDragEvent: handleDragEvent,\n handleUpEvent: handleUpEvent\n });\n\n const options = opt_options || {};\n\n /**\n * @private\n * @type {module:ol/coordinate~Coordinate}\n */\n this.anchor_ = null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.lastAngle_ = undefined;\n\n /**\n * @private\n * @type {boolean}\n */\n this.rotating_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.rotationDelta_ = 0.0;\n\n /**\n * @private\n * @type {number}\n */\n this.threshold_ = options.threshold !== undefined ? options.threshold : 0.3;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 250;\n\n};\n\ninherits(PinchRotate, PointerInteraction);\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @this {module:ol/interaction/PinchRotate}\n */\nfunction handleDragEvent(mapBrowserEvent) {\n let rotationDelta = 0.0;\n\n const touch0 = this.targetPointers[0];\n const touch1 = this.targetPointers[1];\n\n // angle between touches\n const angle = Math.atan2(\n touch1.clientY - touch0.clientY,\n touch1.clientX - touch0.clientX);\n\n if (this.lastAngle_ !== undefined) {\n const delta = angle - this.lastAngle_;\n this.rotationDelta_ += delta;\n if (!this.rotating_ &&\n Math.abs(this.rotationDelta_) > this.threshold_) {\n this.rotating_ = true;\n }\n rotationDelta = delta;\n }\n this.lastAngle_ = angle;\n\n const map = mapBrowserEvent.map;\n const view = map.getView();\n if (view.getConstraints().rotation === disable) {\n return;\n }\n\n // rotate anchor point.\n // FIXME: should be the intersection point between the lines:\n // touch0,touch1 and previousTouch0,previousTouch1\n const viewportPosition = map.getViewport().getBoundingClientRect();\n const centroid = centroidFromPointers(this.targetPointers);\n centroid[0] -= viewportPosition.left;\n centroid[1] -= viewportPosition.top;\n this.anchor_ = map.getCoordinateFromPixel(centroid);\n\n // rotate\n if (this.rotating_) {\n const rotation = view.getRotation();\n map.render();\n rotateWithoutConstraints(view, rotation + rotationDelta, this.anchor_);\n }\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Stop drag sequence?\n * @this {module:ol/interaction/PinchRotate}\n */\nfunction handleUpEvent(mapBrowserEvent) {\n if (this.targetPointers.length < 2) {\n const map = mapBrowserEvent.map;\n const view = map.getView();\n view.setHint(ViewHint.INTERACTING, -1);\n if (this.rotating_) {\n const rotation = view.getRotation();\n rotate(view, rotation, this.anchor_, this.duration_);\n }\n return false;\n } else {\n return true;\n }\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Start drag sequence?\n * @this {module:ol/interaction/PinchRotate}\n */\nfunction handleDownEvent(mapBrowserEvent) {\n if (this.targetPointers.length >= 2) {\n const map = mapBrowserEvent.map;\n this.anchor_ = null;\n this.lastAngle_ = undefined;\n this.rotating_ = false;\n this.rotationDelta_ = 0.0;\n if (!this.handlingDownUpSequence) {\n map.getView().setHint(ViewHint.INTERACTING, 1);\n }\n return true;\n } else {\n return false;\n }\n}\n\n\n/**\n * @inheritDoc\n */\nPinchRotate.prototype.shouldStopEvent = FALSE;\n\nexport default PinchRotate;\n","/**\n * @module ol/interaction/PinchZoom\n */\nimport {inherits} from '../util.js';\nimport ViewHint from '../ViewHint.js';\nimport {FALSE} from '../functions.js';\nimport {zoom, zoomWithoutConstraints} from '../interaction/Interaction.js';\nimport PointerInteraction, {centroid as centroidFromPointers} from '../interaction/Pointer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [duration=400] Animation duration in milliseconds.\n * @property {boolean} [constrainResolution=false] Zoom to the closest integer\n * zoom level after the pinch gesture ends.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom the map by pinching with two fingers\n * on a touch screen.\n *\n * @constructor\n * @extends {module:ol/interaction/Pointer}\n * @param {module:ol/interaction/PinchZoom~Options=} opt_options Options.\n * @api\n */\nconst PinchZoom = function(opt_options) {\n\n PointerInteraction.call(this, {\n handleDownEvent: handleDownEvent,\n handleDragEvent: handleDragEvent,\n handleUpEvent: handleUpEvent\n });\n\n const options = opt_options ? opt_options : {};\n\n /**\n * @private\n * @type {boolean}\n */\n this.constrainResolution_ = options.constrainResolution || false;\n\n /**\n * @private\n * @type {module:ol/coordinate~Coordinate}\n */\n this.anchor_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 400;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.lastDistance_ = undefined;\n\n /**\n * @private\n * @type {number}\n */\n this.lastScaleDelta_ = 1;\n\n};\n\ninherits(PinchZoom, PointerInteraction);\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @this {module:ol/interaction/PinchZoom}\n */\nfunction handleDragEvent(mapBrowserEvent) {\n let scaleDelta = 1.0;\n\n const touch0 = this.targetPointers[0];\n const touch1 = this.targetPointers[1];\n const dx = touch0.clientX - touch1.clientX;\n const dy = touch0.clientY - touch1.clientY;\n\n // distance between touches\n const distance = Math.sqrt(dx * dx + dy * dy);\n\n if (this.lastDistance_ !== undefined) {\n scaleDelta = this.lastDistance_ / distance;\n }\n this.lastDistance_ = distance;\n\n\n const map = mapBrowserEvent.map;\n const view = map.getView();\n const resolution = view.getResolution();\n const maxResolution = view.getMaxResolution();\n const minResolution = view.getMinResolution();\n let newResolution = resolution * scaleDelta;\n if (newResolution > maxResolution) {\n scaleDelta = maxResolution / resolution;\n newResolution = maxResolution;\n } else if (newResolution < minResolution) {\n scaleDelta = minResolution / resolution;\n newResolution = minResolution;\n }\n\n if (scaleDelta != 1.0) {\n this.lastScaleDelta_ = scaleDelta;\n }\n\n // scale anchor point.\n const viewportPosition = map.getViewport().getBoundingClientRect();\n const centroid = centroidFromPointers(this.targetPointers);\n centroid[0] -= viewportPosition.left;\n centroid[1] -= viewportPosition.top;\n this.anchor_ = map.getCoordinateFromPixel(centroid);\n\n // scale, bypass the resolution constraint\n map.render();\n zoomWithoutConstraints(view, newResolution, this.anchor_);\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Stop drag sequence?\n * @this {module:ol/interaction/PinchZoom}\n */\nfunction handleUpEvent(mapBrowserEvent) {\n if (this.targetPointers.length < 2) {\n const map = mapBrowserEvent.map;\n const view = map.getView();\n view.setHint(ViewHint.INTERACTING, -1);\n const resolution = view.getResolution();\n if (this.constrainResolution_ ||\n resolution < view.getMinResolution() ||\n resolution > view.getMaxResolution()) {\n // Zoom to final resolution, with an animation, and provide a\n // direction not to zoom out/in if user was pinching in/out.\n // Direction is > 0 if pinching out, and < 0 if pinching in.\n const direction = this.lastScaleDelta_ - 1;\n zoom(view, resolution, this.anchor_, this.duration_, direction);\n }\n return false;\n } else {\n return true;\n }\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Start drag sequence?\n * @this {module:ol/interaction/PinchZoom}\n */\nfunction handleDownEvent(mapBrowserEvent) {\n if (this.targetPointers.length >= 2) {\n const map = mapBrowserEvent.map;\n this.anchor_ = null;\n this.lastDistance_ = undefined;\n this.lastScaleDelta_ = 1;\n if (!this.handlingDownUpSequence) {\n map.getView().setHint(ViewHint.INTERACTING, 1);\n }\n return true;\n } else {\n return false;\n }\n}\n\n\n/**\n * @inheritDoc\n */\nPinchZoom.prototype.shouldStopEvent = FALSE;\nexport default PinchZoom;\n","/**\n * @module ol/interaction/DragAndDrop\n */\n// FIXME should handle all geo-referenced data, not just vector data\n\nimport {inherits} from '../util.js';\nimport {TRUE} from '../functions.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport Interaction from '../interaction/Interaction.js';\nimport {get as getProjection} from '../proj.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {Array.<function(new: module:ol/format/Feature)>} [formatConstructors] Format constructors.\n * @property {module:ol/source/Vector} [source] Optional vector source where features will be added. If a source is provided\n * all existing features will be removed and new features will be added when\n * they are dropped on the target. If you want to add features to a vector\n * source without removing the existing features (append only), instead of\n * providing the source option listen for the \"addfeatures\" event.\n * @property {module:ol/proj~ProjectionLike} [projection] Target projection. By default, the map's view's projection is used.\n * @property {Element} [target] The element that is used as the drop target, default is the viewport element.\n */\n\n\n/**\n * @enum {string}\n */\nconst DragAndDropEventType = {\n /**\n * Triggered when features are added\n * @event module:ol/interaction/DragAndDrop~DragAndDropEvent#addfeatures\n * @api\n */\n ADD_FEATURES: 'addfeatures'\n};\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/DragAndDrop~DragAndDrop} instances are instances\n * of this type.\n *\n * @constructor\n * @extends {module:ol/events/Event}\n * @param {module:ol/interaction/DragAndDrop~DragAndDropEventType} type Type.\n * @param {File} file File.\n * @param {Array.<module:ol/Feature>=} opt_features Features.\n * @param {module:ol/proj/Projection=} opt_projection Projection.\n */\nconst DragAndDropEvent = function(type, file, opt_features, opt_projection) {\n\n Event.call(this, type);\n\n /**\n * The features parsed from dropped data.\n * @type {Array.<module:ol/Feature>|undefined}\n * @api\n */\n this.features = opt_features;\n\n /**\n * The dropped file.\n * @type {File}\n * @api\n */\n this.file = file;\n\n /**\n * The feature projection.\n * @type {module:ol/proj/Projection|undefined}\n * @api\n */\n this.projection = opt_projection;\n\n};\ninherits(DragAndDropEvent, Event);\n\n\n/**\n * @classdesc\n * Handles input of vector data by drag and drop.\n *\n * @constructor\n * @extends {module:ol/interaction/Interaction}\n * @fires module:ol/interaction/DragAndDrop~DragAndDropEvent\n * @param {module:ol/interaction/DragAndDrop~Options=} opt_options Options.\n * @api\n */\nconst DragAndDrop = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n Interaction.call(this, {\n handleEvent: TRUE\n });\n\n /**\n * @private\n * @type {Array.<function(new: module:ol/format/Feature)>}\n */\n this.formatConstructors_ = options.formatConstructors ?\n options.formatConstructors : [];\n\n /**\n * @private\n * @type {module:ol/proj/Projection}\n */\n this.projection_ = options.projection ?\n getProjection(options.projection) : null;\n\n /**\n * @private\n * @type {Array.<module:ol/events~EventsKey>}\n */\n this.dropListenKeys_ = null;\n\n /**\n * @private\n * @type {module:ol/source/Vector}\n */\n this.source_ = options.source || null;\n\n /**\n * @private\n * @type {Element}\n */\n this.target = options.target ? options.target : null;\n\n};\n\ninherits(DragAndDrop, Interaction);\n\n\n/**\n * @param {DragEvent} event Event.\n * @this {module:ol/interaction/DragAndDrop}\n */\nfunction handleDrop(event) {\n const files = event.dataTransfer.files;\n for (let i = 0, ii = files.length; i < ii; ++i) {\n const file = files.item(i);\n const reader = new FileReader();\n reader.addEventListener(EventType.LOAD, this.handleResult_.bind(this, file));\n reader.readAsText(file);\n }\n}\n\n\n/**\n * @param {DragEvent} event Event.\n */\nfunction handleStop(event) {\n event.stopPropagation();\n event.preventDefault();\n event.dataTransfer.dropEffect = 'copy';\n}\n\n\n/**\n * @param {File} file File.\n * @param {Event} event Load event.\n * @private\n */\nDragAndDrop.prototype.handleResult_ = function(file, event) {\n const result = event.target.result;\n const map = this.getMap();\n let projection = this.projection_;\n if (!projection) {\n const view = map.getView();\n projection = view.getProjection();\n }\n\n const formatConstructors = this.formatConstructors_;\n let features = [];\n for (let i = 0, ii = formatConstructors.length; i < ii; ++i) {\n /**\n * Avoid \"cannot instantiate abstract class\" error.\n * @type {Function}\n */\n const formatConstructor = formatConstructors[i];\n /**\n * @type {module:ol/format/Feature}\n */\n const format = new formatConstructor();\n features = this.tryReadFeatures_(format, result, {\n featureProjection: projection\n });\n if (features && features.length > 0) {\n break;\n }\n }\n if (this.source_) {\n this.source_.clear();\n this.source_.addFeatures(features);\n }\n this.dispatchEvent(\n new DragAndDropEvent(\n DragAndDropEventType.ADD_FEATURES, file,\n features, projection));\n};\n\n\n/**\n * @private\n */\nDragAndDrop.prototype.registerListeners_ = function() {\n const map = this.getMap();\n if (map) {\n const dropArea = this.target ? this.target : map.getViewport();\n this.dropListenKeys_ = [\n listen(dropArea, EventType.DROP, handleDrop, this),\n listen(dropArea, EventType.DRAGENTER, handleStop, this),\n listen(dropArea, EventType.DRAGOVER, handleStop, this),\n listen(dropArea, EventType.DROP, handleStop, this)\n ];\n }\n};\n\n\n/**\n * @inheritDoc\n */\nDragAndDrop.prototype.setActive = function(active) {\n Interaction.prototype.setActive.call(this, active);\n if (active) {\n this.registerListeners_();\n } else {\n this.unregisterListeners_();\n }\n};\n\n\n/**\n * @inheritDoc\n */\nDragAndDrop.prototype.setMap = function(map) {\n this.unregisterListeners_();\n Interaction.prototype.setMap.call(this, map);\n if (this.getActive()) {\n this.registerListeners_();\n }\n};\n\n\n/**\n * @param {module:ol/format/Feature} format Format.\n * @param {string} text Text.\n * @param {module:ol/format/Feature~ReadOptions} options Read options.\n * @private\n * @return {Array.<module:ol/Feature>} Features.\n */\nDragAndDrop.prototype.tryReadFeatures_ = function(format, text, options) {\n try {\n return format.readFeatures(text, options);\n } catch (e) {\n return null;\n }\n};\n\n\n/**\n * @private\n */\nDragAndDrop.prototype.unregisterListeners_ = function() {\n if (this.dropListenKeys_) {\n this.dropListenKeys_.forEach(unlistenByKey);\n this.dropListenKeys_ = null;\n }\n};\n\n\nexport default DragAndDrop;\n","/**\n * @module ol/interaction/DragRotateAndZoom\n */\nimport {inherits} from '../util.js';\nimport {disable} from '../rotationconstraint.js';\nimport ViewHint from '../ViewHint.js';\nimport {shiftKeyOnly, mouseOnly} from '../events/condition.js';\nimport {rotate, rotateWithoutConstraints, zoom, zoomWithoutConstraints} from '../interaction/Interaction.js';\nimport PointerInteraction from '../interaction/Pointer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/events/condition~Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * Default is {@link module:ol/events/condition~shiftKeyOnly}.\n * @property {number} [duration=400] Animation duration in milliseconds.\n */\n\n\n/**\n * @classdesc\n * Allows the user to zoom and rotate the map by clicking and dragging\n * on the map. By default, this interaction is limited to when the shift\n * key is held down.\n *\n * This interaction is only supported for mouse devices.\n *\n * And this interaction is not included in the default interactions.\n *\n * @constructor\n * @extends {module:ol/interaction/Pointer}\n * @param {module:ol/interaction/DragRotateAndZoom~Options=} opt_options Options.\n * @api\n */\nconst DragRotateAndZoom = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n PointerInteraction.call(this, {\n handleDownEvent: handleDownEvent,\n handleDragEvent: handleDragEvent,\n handleUpEvent: handleUpEvent\n });\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.condition_ = options.condition ? options.condition : shiftKeyOnly;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.lastAngle_ = undefined;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.lastMagnitude_ = undefined;\n\n /**\n * @private\n * @type {number}\n */\n this.lastScaleDelta_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.duration_ = options.duration !== undefined ? options.duration : 400;\n\n};\n\ninherits(DragRotateAndZoom, PointerInteraction);\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @this {module:ol/interaction/DragRotateAndZoom}\n */\nfunction handleDragEvent(mapBrowserEvent) {\n if (!mouseOnly(mapBrowserEvent)) {\n return;\n }\n\n const map = mapBrowserEvent.map;\n const size = map.getSize();\n const offset = mapBrowserEvent.pixel;\n const deltaX = offset[0] - size[0] / 2;\n const deltaY = size[1] / 2 - offset[1];\n const theta = Math.atan2(deltaY, deltaX);\n const magnitude = Math.sqrt(deltaX * deltaX + deltaY * deltaY);\n const view = map.getView();\n if (view.getConstraints().rotation !== disable && this.lastAngle_ !== undefined) {\n const angleDelta = theta - this.lastAngle_;\n rotateWithoutConstraints(view, view.getRotation() - angleDelta);\n }\n this.lastAngle_ = theta;\n if (this.lastMagnitude_ !== undefined) {\n const resolution = this.lastMagnitude_ * (view.getResolution() / magnitude);\n zoomWithoutConstraints(view, resolution);\n }\n if (this.lastMagnitude_ !== undefined) {\n this.lastScaleDelta_ = this.lastMagnitude_ / magnitude;\n }\n this.lastMagnitude_ = magnitude;\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Stop drag sequence?\n * @this {module:ol/interaction/DragRotateAndZoom}\n */\nfunction handleUpEvent(mapBrowserEvent) {\n if (!mouseOnly(mapBrowserEvent)) {\n return true;\n }\n\n const map = mapBrowserEvent.map;\n const view = map.getView();\n view.setHint(ViewHint.INTERACTING, -1);\n const direction = this.lastScaleDelta_ - 1;\n rotate(view, view.getRotation());\n zoom(view, view.getResolution(), undefined, this.duration_, direction);\n this.lastScaleDelta_ = 0;\n return false;\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Start drag sequence?\n * @this {module:ol/interaction/DragRotateAndZoom}\n */\nfunction handleDownEvent(mapBrowserEvent) {\n if (!mouseOnly(mapBrowserEvent)) {\n return false;\n }\n\n if (this.condition_(mapBrowserEvent)) {\n mapBrowserEvent.map.getView().setHint(ViewHint.INTERACTING, 1);\n this.lastAngle_ = undefined;\n this.lastMagnitude_ = undefined;\n return true;\n } else {\n return false;\n }\n}\n\nexport default DragRotateAndZoom;\n","/**\n * @module ol/geom/Circle\n */\nimport {inherits} from '../util.js';\nimport {createOrUpdate, forEachCorner, intersects} from '../extent.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport SimpleGeometry from '../geom/SimpleGeometry.js';\nimport {deflateCoordinate} from '../geom/flat/deflate.js';\n\n/**\n * @classdesc\n * Circle geometry.\n *\n * @constructor\n * @extends {module:ol/geom/SimpleGeometry}\n * @param {module:ol/coordinate~Coordinate} center Center.\n * @param {number=} opt_radius Radius.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @api\n */\nconst Circle = function(center, opt_radius, opt_layout) {\n SimpleGeometry.call(this);\n const radius = opt_radius ? opt_radius : 0;\n this.setCenterAndRadius(center, radius, opt_layout);\n};\n\ninherits(Circle, SimpleGeometry);\n\n\n/**\n * Make a complete copy of the geometry.\n * @return {!module:ol/geom/Circle} Clone.\n * @override\n * @api\n */\nCircle.prototype.clone = function() {\n const circle = new Circle(null);\n circle.setFlatCoordinates(this.layout, this.flatCoordinates.slice());\n return circle;\n};\n\n\n/**\n * @inheritDoc\n */\nCircle.prototype.closestPointXY = function(x, y, closestPoint, minSquaredDistance) {\n const flatCoordinates = this.flatCoordinates;\n const dx = x - flatCoordinates[0];\n const dy = y - flatCoordinates[1];\n const squaredDistance = dx * dx + dy * dy;\n if (squaredDistance < minSquaredDistance) {\n if (squaredDistance === 0) {\n for (let i = 0; i < this.stride; ++i) {\n closestPoint[i] = flatCoordinates[i];\n }\n } else {\n const delta = this.getRadius() / Math.sqrt(squaredDistance);\n closestPoint[0] = flatCoordinates[0] + delta * dx;\n closestPoint[1] = flatCoordinates[1] + delta * dy;\n for (let i = 2; i < this.stride; ++i) {\n closestPoint[i] = flatCoordinates[i];\n }\n }\n closestPoint.length = this.stride;\n return squaredDistance;\n } else {\n return minSquaredDistance;\n }\n};\n\n\n/**\n * @inheritDoc\n */\nCircle.prototype.containsXY = function(x, y) {\n const flatCoordinates = this.flatCoordinates;\n const dx = x - flatCoordinates[0];\n const dy = y - flatCoordinates[1];\n return dx * dx + dy * dy <= this.getRadiusSquared_();\n};\n\n\n/**\n * Return the center of the circle as {@link module:ol/coordinate~Coordinate coordinate}.\n * @return {module:ol/coordinate~Coordinate} Center.\n * @api\n */\nCircle.prototype.getCenter = function() {\n return this.flatCoordinates.slice(0, this.stride);\n};\n\n\n/**\n * @inheritDoc\n */\nCircle.prototype.computeExtent = function(extent) {\n const flatCoordinates = this.flatCoordinates;\n const radius = flatCoordinates[this.stride] - flatCoordinates[0];\n return createOrUpdate(\n flatCoordinates[0] - radius, flatCoordinates[1] - radius,\n flatCoordinates[0] + radius, flatCoordinates[1] + radius,\n extent);\n};\n\n\n/**\n * Return the radius of the circle.\n * @return {number} Radius.\n * @api\n */\nCircle.prototype.getRadius = function() {\n return Math.sqrt(this.getRadiusSquared_());\n};\n\n\n/**\n * @private\n * @return {number} Radius squared.\n */\nCircle.prototype.getRadiusSquared_ = function() {\n const dx = this.flatCoordinates[this.stride] - this.flatCoordinates[0];\n const dy = this.flatCoordinates[this.stride + 1] - this.flatCoordinates[1];\n return dx * dx + dy * dy;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nCircle.prototype.getType = function() {\n return GeometryType.CIRCLE;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nCircle.prototype.intersectsExtent = function(extent) {\n const circleExtent = this.getExtent();\n if (intersects(extent, circleExtent)) {\n const center = this.getCenter();\n\n if (extent[0] <= center[0] && extent[2] >= center[0]) {\n return true;\n }\n if (extent[1] <= center[1] && extent[3] >= center[1]) {\n return true;\n }\n\n return forEachCorner(extent, this.intersectsCoordinate, this);\n }\n return false;\n\n};\n\n\n/**\n * Set the center of the circle as {@link module:ol/coordinate~Coordinate coordinate}.\n * @param {module:ol/coordinate~Coordinate} center Center.\n * @api\n */\nCircle.prototype.setCenter = function(center) {\n const stride = this.stride;\n const radius = this.flatCoordinates[stride] - this.flatCoordinates[0];\n const flatCoordinates = center.slice();\n flatCoordinates[stride] = flatCoordinates[0] + radius;\n for (let i = 1; i < stride; ++i) {\n flatCoordinates[stride + i] = center[i];\n }\n this.setFlatCoordinates(this.layout, flatCoordinates);\n};\n\n\n/**\n * Set the center (as {@link module:ol/coordinate~Coordinate coordinate}) and the radius (as\n * number) of the circle.\n * @param {module:ol/coordinate~Coordinate} center Center.\n * @param {number} radius Radius.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @api\n */\nCircle.prototype.setCenterAndRadius = function(center, radius, opt_layout) {\n if (!center) {\n this.setFlatCoordinates(GeometryLayout.XY, null);\n } else {\n this.setLayout(opt_layout, center, 0);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n /** @type {Array.<number>} */\n const flatCoordinates = this.flatCoordinates;\n let offset = deflateCoordinate(\n flatCoordinates, 0, center, this.stride);\n flatCoordinates[offset++] = flatCoordinates[0] + radius;\n for (let i = 1, ii = this.stride; i < ii; ++i) {\n flatCoordinates[offset++] = flatCoordinates[i];\n }\n flatCoordinates.length = offset;\n this.changed();\n }\n};\n\n\n/**\n * @inheritDoc\n */\nCircle.prototype.getCoordinates = function() {};\n\n\n/**\n * @inheritDoc\n */\nCircle.prototype.setCoordinates = function(coordinates, opt_layout) {};\n\n\n/**\n * @param {module:ol/geom/GeometryLayout} layout Layout.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n */\nCircle.prototype.setFlatCoordinates = function(layout, flatCoordinates) {\n this.setFlatCoordinatesInternal(layout, flatCoordinates);\n this.changed();\n};\n\n\n/**\n * Set the radius of the circle. The radius is in the units of the projection.\n * @param {number} radius Radius.\n * @api\n */\nCircle.prototype.setRadius = function(radius) {\n this.flatCoordinates[this.stride] = this.flatCoordinates[0] + radius;\n this.changed();\n};\n\n\n/**\n * Transform each coordinate of the circle from one coordinate reference system\n * to another. The geometry is modified in place.\n * If you do not want the geometry modified in place, first clone() it and\n * then use this function on the clone.\n *\n * Internally a circle is currently represented by two points: the center of\n * the circle `[cx, cy]`, and the point to the right of the circle\n * `[cx + r, cy]`. This `transform` function just transforms these two points.\n * So the resulting geometry is also a circle, and that circle does not\n * correspond to the shape that would be obtained by transforming every point\n * of the original circle.\n *\n * @param {module:ol/proj~ProjectionLike} source The current projection. Can be a\n * string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @param {module:ol/proj~ProjectionLike} destination The desired projection. Can be a\n * string identifier or a {@link module:ol/proj/Projection~Projection} object.\n * @return {module:ol/geom/Circle} This geometry. Note that original geometry is\n * modified in place.\n * @function\n * @api\n */\nCircle.prototype.transform;\nexport default Circle;\n","/**\n * @module ol/geom/MultiLineString\n */\nimport {inherits} from '../util.js';\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport LineString from '../geom/LineString.js';\nimport SimpleGeometry from '../geom/SimpleGeometry.js';\nimport {assignClosestArrayPoint, arrayMaxSquaredDelta} from '../geom/flat/closest.js';\nimport {deflateCoordinatesArray} from '../geom/flat/deflate.js';\nimport {inflateCoordinatesArray} from '../geom/flat/inflate.js';\nimport {interpolatePoint, lineStringsCoordinateAtM} from '../geom/flat/interpolate.js';\nimport {intersectsLineStringArray} from '../geom/flat/intersectsextent.js';\nimport {douglasPeuckerArray} from '../geom/flat/simplify.js';\n\n/**\n * @classdesc\n * Multi-linestring geometry.\n *\n * @constructor\n * @extends {module:ol/geom/SimpleGeometry}\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} coordinates Coordinates.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @api\n */\nconst MultiLineString = function(coordinates, opt_layout) {\n\n SimpleGeometry.call(this);\n\n /**\n * @type {Array.<number>}\n * @private\n */\n this.ends_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n this.setCoordinates(coordinates, opt_layout);\n\n};\n\ninherits(MultiLineString, SimpleGeometry);\n\n\n/**\n * Append the passed linestring to the multilinestring.\n * @param {module:ol/geom/LineString} lineString LineString.\n * @api\n */\nMultiLineString.prototype.appendLineString = function(lineString) {\n if (!this.flatCoordinates) {\n this.flatCoordinates = lineString.getFlatCoordinates().slice();\n } else {\n extend(this.flatCoordinates, lineString.getFlatCoordinates().slice());\n }\n this.ends_.push(this.flatCoordinates.length);\n this.changed();\n};\n\n\n/**\n * Make a complete copy of the geometry.\n * @return {!module:ol/geom/MultiLineString} Clone.\n * @override\n * @api\n */\nMultiLineString.prototype.clone = function() {\n const multiLineString = new MultiLineString(null);\n multiLineString.setFlatCoordinates(\n this.layout, this.flatCoordinates.slice(), this.ends_.slice());\n return multiLineString;\n};\n\n\n/**\n * @inheritDoc\n */\nMultiLineString.prototype.closestPointXY = function(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(arrayMaxSquaredDelta(\n this.flatCoordinates, 0, this.ends_, this.stride, 0));\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestArrayPoint(\n this.flatCoordinates, 0, this.ends_, this.stride,\n this.maxDelta_, false, x, y, closestPoint, minSquaredDistance);\n};\n\n\n/**\n * Returns the coordinate at `m` using linear interpolation, or `null` if no\n * such coordinate exists.\n *\n * `opt_extrapolate` controls extrapolation beyond the range of Ms in the\n * MultiLineString. If `opt_extrapolate` is `true` then Ms less than the first\n * M will return the first coordinate and Ms greater than the last M will\n * return the last coordinate.\n *\n * `opt_interpolate` controls interpolation between consecutive LineStrings\n * within the MultiLineString. If `opt_interpolate` is `true` the coordinates\n * will be linearly interpolated between the last coordinate of one LineString\n * and the first coordinate of the next LineString. If `opt_interpolate` is\n * `false` then the function will return `null` for Ms falling between\n * LineStrings.\n *\n * @param {number} m M.\n * @param {boolean=} opt_extrapolate Extrapolate. Default is `false`.\n * @param {boolean=} opt_interpolate Interpolate. Default is `false`.\n * @return {module:ol/coordinate~Coordinate} Coordinate.\n * @api\n */\nMultiLineString.prototype.getCoordinateAtM = function(m, opt_extrapolate, opt_interpolate) {\n if ((this.layout != GeometryLayout.XYM &&\n this.layout != GeometryLayout.XYZM) ||\n this.flatCoordinates.length === 0) {\n return null;\n }\n const extrapolate = opt_extrapolate !== undefined ? opt_extrapolate : false;\n const interpolate = opt_interpolate !== undefined ? opt_interpolate : false;\n return lineStringsCoordinateAtM(this.flatCoordinates, 0,\n this.ends_, this.stride, m, extrapolate, interpolate);\n};\n\n\n/**\n * Return the coordinates of the multilinestring.\n * @return {Array.<Array.<module:ol/coordinate~Coordinate>>} Coordinates.\n * @override\n * @api\n */\nMultiLineString.prototype.getCoordinates = function() {\n return inflateCoordinatesArray(\n this.flatCoordinates, 0, this.ends_, this.stride);\n};\n\n\n/**\n * @return {Array.<number>} Ends.\n */\nMultiLineString.prototype.getEnds = function() {\n return this.ends_;\n};\n\n\n/**\n * Return the linestring at the specified index.\n * @param {number} index Index.\n * @return {module:ol/geom/LineString} LineString.\n * @api\n */\nMultiLineString.prototype.getLineString = function(index) {\n if (index < 0 || this.ends_.length <= index) {\n return null;\n }\n const lineString = new LineString(null);\n lineString.setFlatCoordinates(this.layout, this.flatCoordinates.slice(\n index === 0 ? 0 : this.ends_[index - 1], this.ends_[index]));\n return lineString;\n};\n\n\n/**\n * Return the linestrings of this multilinestring.\n * @return {Array.<module:ol/geom/LineString>} LineStrings.\n * @api\n */\nMultiLineString.prototype.getLineStrings = function() {\n const flatCoordinates = this.flatCoordinates;\n const ends = this.ends_;\n const layout = this.layout;\n /** @type {Array.<module:ol/geom/LineString>} */\n const lineStrings = [];\n let offset = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const lineString = new LineString(null);\n lineString.setFlatCoordinates(layout, flatCoordinates.slice(offset, end));\n lineStrings.push(lineString);\n offset = end;\n }\n return lineStrings;\n};\n\n\n/**\n * @return {Array.<number>} Flat midpoints.\n */\nMultiLineString.prototype.getFlatMidpoints = function() {\n const midpoints = [];\n const flatCoordinates = this.flatCoordinates;\n let offset = 0;\n const ends = this.ends_;\n const stride = this.stride;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const midpoint = interpolatePoint(\n flatCoordinates, offset, end, stride, 0.5);\n extend(midpoints, midpoint);\n offset = end;\n }\n return midpoints;\n};\n\n\n/**\n * @inheritDoc\n */\nMultiLineString.prototype.getSimplifiedGeometryInternal = function(squaredTolerance) {\n const simplifiedFlatCoordinates = [];\n const simplifiedEnds = [];\n simplifiedFlatCoordinates.length = douglasPeuckerArray(\n this.flatCoordinates, 0, this.ends_, this.stride, squaredTolerance,\n simplifiedFlatCoordinates, 0, simplifiedEnds);\n const simplifiedMultiLineString = new MultiLineString(null);\n simplifiedMultiLineString.setFlatCoordinates(\n GeometryLayout.XY, simplifiedFlatCoordinates, simplifiedEnds);\n return simplifiedMultiLineString;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nMultiLineString.prototype.getType = function() {\n return GeometryType.MULTI_LINE_STRING;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nMultiLineString.prototype.intersectsExtent = function(extent) {\n return intersectsLineStringArray(\n this.flatCoordinates, 0, this.ends_, this.stride, extent);\n};\n\n\n/**\n * Set the coordinates of the multilinestring.\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} coordinates Coordinates.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @override\n * @api\n */\nMultiLineString.prototype.setCoordinates = function(coordinates, opt_layout) {\n if (!coordinates) {\n this.setFlatCoordinates(GeometryLayout.XY, null, this.ends_);\n } else {\n this.setLayout(opt_layout, coordinates, 2);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n const ends = deflateCoordinatesArray(\n this.flatCoordinates, 0, coordinates, this.stride, this.ends_);\n this.flatCoordinates.length = ends.length === 0 ? 0 : ends[ends.length - 1];\n this.changed();\n }\n};\n\n\n/**\n * @param {module:ol/geom/GeometryLayout} layout Layout.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {Array.<number>} ends Ends.\n */\nMultiLineString.prototype.setFlatCoordinates = function(layout, flatCoordinates, ends) {\n this.setFlatCoordinatesInternal(layout, flatCoordinates);\n this.ends_ = ends;\n this.changed();\n};\n\n\n/**\n * @param {Array.<module:ol/geom/LineString>} lineStrings LineStrings.\n */\nMultiLineString.prototype.setLineStrings = function(lineStrings) {\n let layout = this.getLayout();\n const flatCoordinates = [];\n const ends = [];\n for (let i = 0, ii = lineStrings.length; i < ii; ++i) {\n const lineString = lineStrings[i];\n if (i === 0) {\n layout = lineString.getLayout();\n }\n extend(flatCoordinates, lineString.getFlatCoordinates());\n ends.push(flatCoordinates.length);\n }\n this.setFlatCoordinates(layout, flatCoordinates, ends);\n};\nexport default MultiLineString;\n","/**\n * @module ol/geom/MultiPoint\n */\nimport {inherits} from '../util.js';\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY, containsXY} from '../extent.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport Point from '../geom/Point.js';\nimport SimpleGeometry from '../geom/SimpleGeometry.js';\nimport {deflateCoordinates} from '../geom/flat/deflate.js';\nimport {inflateCoordinates} from '../geom/flat/inflate.js';\nimport {squaredDistance as squaredDx} from '../math.js';\n\n/**\n * @classdesc\n * Multi-point geometry.\n *\n * @constructor\n * @extends {module:ol/geom/SimpleGeometry}\n * @param {Array.<module:ol/coordinate~Coordinate>} coordinates Coordinates.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @api\n */\nconst MultiPoint = function(coordinates, opt_layout) {\n SimpleGeometry.call(this);\n this.setCoordinates(coordinates, opt_layout);\n};\n\ninherits(MultiPoint, SimpleGeometry);\n\n\n/**\n * Append the passed point to this multipoint.\n * @param {module:ol/geom/Point} point Point.\n * @api\n */\nMultiPoint.prototype.appendPoint = function(point) {\n if (!this.flatCoordinates) {\n this.flatCoordinates = point.getFlatCoordinates().slice();\n } else {\n extend(this.flatCoordinates, point.getFlatCoordinates());\n }\n this.changed();\n};\n\n\n/**\n * Make a complete copy of the geometry.\n * @return {!module:ol/geom/MultiPoint} Clone.\n * @override\n * @api\n */\nMultiPoint.prototype.clone = function() {\n const multiPoint = new MultiPoint(null);\n multiPoint.setFlatCoordinates(this.layout, this.flatCoordinates.slice());\n return multiPoint;\n};\n\n\n/**\n * @inheritDoc\n */\nMultiPoint.prototype.closestPointXY = function(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n const flatCoordinates = this.flatCoordinates;\n const stride = this.stride;\n for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n const squaredDistance = squaredDx(\n x, y, flatCoordinates[i], flatCoordinates[i + 1]);\n if (squaredDistance < minSquaredDistance) {\n minSquaredDistance = squaredDistance;\n for (let j = 0; j < stride; ++j) {\n closestPoint[j] = flatCoordinates[i + j];\n }\n closestPoint.length = stride;\n }\n }\n return minSquaredDistance;\n};\n\n\n/**\n * Return the coordinates of the multipoint.\n * @return {Array.<module:ol/coordinate~Coordinate>} Coordinates.\n * @override\n * @api\n */\nMultiPoint.prototype.getCoordinates = function() {\n return inflateCoordinates(\n this.flatCoordinates, 0, this.flatCoordinates.length, this.stride);\n};\n\n\n/**\n * Return the point at the specified index.\n * @param {number} index Index.\n * @return {module:ol/geom/Point} Point.\n * @api\n */\nMultiPoint.prototype.getPoint = function(index) {\n const n = !this.flatCoordinates ? 0 : this.flatCoordinates.length / this.stride;\n if (index < 0 || n <= index) {\n return null;\n }\n const point = new Point(null);\n point.setFlatCoordinates(this.layout, this.flatCoordinates.slice(\n index * this.stride, (index + 1) * this.stride));\n return point;\n};\n\n\n/**\n * Return the points of this multipoint.\n * @return {Array.<module:ol/geom/Point>} Points.\n * @api\n */\nMultiPoint.prototype.getPoints = function() {\n const flatCoordinates = this.flatCoordinates;\n const layout = this.layout;\n const stride = this.stride;\n /** @type {Array.<module:ol/geom/Point>} */\n const points = [];\n for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n const point = new Point(null);\n point.setFlatCoordinates(layout, flatCoordinates.slice(i, i + stride));\n points.push(point);\n }\n return points;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nMultiPoint.prototype.getType = function() {\n return GeometryType.MULTI_POINT;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nMultiPoint.prototype.intersectsExtent = function(extent) {\n const flatCoordinates = this.flatCoordinates;\n const stride = this.stride;\n for (let i = 0, ii = flatCoordinates.length; i < ii; i += stride) {\n const x = flatCoordinates[i];\n const y = flatCoordinates[i + 1];\n if (containsXY(extent, x, y)) {\n return true;\n }\n }\n return false;\n};\n\n\n/**\n * Set the coordinates of the multipoint.\n * @param {Array.<module:ol/coordinate~Coordinate>} coordinates Coordinates.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @override\n * @api\n */\nMultiPoint.prototype.setCoordinates = function(coordinates, opt_layout) {\n if (!coordinates) {\n this.setFlatCoordinates(GeometryLayout.XY, null);\n } else {\n this.setLayout(opt_layout, coordinates, 1);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n this.flatCoordinates.length = deflateCoordinates(\n this.flatCoordinates, 0, coordinates, this.stride);\n this.changed();\n }\n};\n\n\n/**\n * @param {module:ol/geom/GeometryLayout} layout Layout.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n */\nMultiPoint.prototype.setFlatCoordinates = function(layout, flatCoordinates) {\n this.setFlatCoordinatesInternal(layout, flatCoordinates);\n this.changed();\n};\nexport default MultiPoint;\n","/**\n * @module ol/geom/flat/center\n */\nimport {createEmpty, createOrUpdateFromFlatCoordinates} from '../../extent.js';\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<Array.<number>>} endss Endss.\n * @param {number} stride Stride.\n * @return {Array.<number>} Flat centers.\n */\nexport function linearRingss(flatCoordinates, offset, endss, stride) {\n const flatCenters = [];\n let extent = createEmpty();\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n extent = createOrUpdateFromFlatCoordinates(flatCoordinates, offset, ends[0], stride);\n flatCenters.push((extent[0] + extent[2]) / 2, (extent[1] + extent[3]) / 2);\n offset = ends[ends.length - 1];\n }\n return flatCenters;\n}\n","/**\n * @module ol/geom/MultiPolygon\n */\nimport {inherits} from '../util.js';\nimport {extend} from '../array.js';\nimport {closestSquaredDistanceXY} from '../extent.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport Polygon from '../geom/Polygon.js';\nimport SimpleGeometry from '../geom/SimpleGeometry.js';\nimport {linearRingss as linearRingssArea} from '../geom/flat/area.js';\nimport {linearRingss as linearRingssCenter} from '../geom/flat/center.js';\nimport {assignClosestMultiArrayPoint, multiArrayMaxSquaredDelta} from '../geom/flat/closest.js';\nimport {linearRingssContainsXY} from '../geom/flat/contains.js';\nimport {deflateMultiCoordinatesArray} from '../geom/flat/deflate.js';\nimport {inflateMultiCoordinatesArray} from '../geom/flat/inflate.js';\nimport {getInteriorPointsOfMultiArray} from '../geom/flat/interiorpoint.js';\nimport {intersectsLinearRingMultiArray} from '../geom/flat/intersectsextent.js';\nimport {linearRingsAreOriented, orientLinearRingsArray} from '../geom/flat/orient.js';\nimport {quantizeMultiArray} from '../geom/flat/simplify.js';\n\n/**\n * @classdesc\n * Multi-polygon geometry.\n *\n * @constructor\n * @extends {module:ol/geom/SimpleGeometry}\n * @param {Array.<Array.<Array.<module:ol/coordinate~Coordinate>>>} coordinates Coordinates.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @api\n */\nconst MultiPolygon = function(coordinates, opt_layout) {\n\n SimpleGeometry.call(this);\n\n /**\n * @type {Array.<Array.<number>>}\n * @private\n */\n this.endss_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.flatInteriorPointsRevision_ = -1;\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.flatInteriorPoints_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDelta_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.maxDeltaRevision_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.orientedRevision_ = -1;\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.orientedFlatCoordinates_ = null;\n\n this.setCoordinates(coordinates, opt_layout);\n\n};\n\ninherits(MultiPolygon, SimpleGeometry);\n\n\n/**\n * Append the passed polygon to this multipolygon.\n * @param {module:ol/geom/Polygon} polygon Polygon.\n * @api\n */\nMultiPolygon.prototype.appendPolygon = function(polygon) {\n /** @type {Array.<number>} */\n let ends;\n if (!this.flatCoordinates) {\n this.flatCoordinates = polygon.getFlatCoordinates().slice();\n ends = polygon.getEnds().slice();\n this.endss_.push();\n } else {\n const offset = this.flatCoordinates.length;\n extend(this.flatCoordinates, polygon.getFlatCoordinates());\n ends = polygon.getEnds().slice();\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n ends[i] += offset;\n }\n }\n this.endss_.push(ends);\n this.changed();\n};\n\n\n/**\n * Make a complete copy of the geometry.\n * @return {!module:ol/geom/MultiPolygon} Clone.\n * @override\n * @api\n */\nMultiPolygon.prototype.clone = function() {\n const multiPolygon = new MultiPolygon(null);\n\n const len = this.endss_.length;\n const newEndss = new Array(len);\n for (let i = 0; i < len; ++i) {\n newEndss[i] = this.endss_[i].slice();\n }\n\n multiPolygon.setFlatCoordinates(\n this.layout, this.flatCoordinates.slice(), newEndss);\n return multiPolygon;\n};\n\n\n/**\n * @inheritDoc\n */\nMultiPolygon.prototype.closestPointXY = function(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n if (this.maxDeltaRevision_ != this.getRevision()) {\n this.maxDelta_ = Math.sqrt(multiArrayMaxSquaredDelta(\n this.flatCoordinates, 0, this.endss_, this.stride, 0));\n this.maxDeltaRevision_ = this.getRevision();\n }\n return assignClosestMultiArrayPoint(\n this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride,\n this.maxDelta_, true, x, y, closestPoint, minSquaredDistance);\n};\n\n\n/**\n * @inheritDoc\n */\nMultiPolygon.prototype.containsXY = function(x, y) {\n return linearRingssContainsXY(this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride, x, y);\n};\n\n\n/**\n * Return the area of the multipolygon on projected plane.\n * @return {number} Area (on projected plane).\n * @api\n */\nMultiPolygon.prototype.getArea = function() {\n return linearRingssArea(this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride);\n};\n\n\n/**\n * Get the coordinate array for this geometry. This array has the structure\n * of a GeoJSON coordinate array for multi-polygons.\n *\n * @param {boolean=} opt_right Orient coordinates according to the right-hand\n * rule (counter-clockwise for exterior and clockwise for interior rings).\n * If `false`, coordinates will be oriented according to the left-hand rule\n * (clockwise for exterior and counter-clockwise for interior rings).\n * By default, coordinate orientation will depend on how the geometry was\n * constructed.\n * @return {Array.<Array.<Array.<module:ol/coordinate~Coordinate>>>} Coordinates.\n * @override\n * @api\n */\nMultiPolygon.prototype.getCoordinates = function(opt_right) {\n let flatCoordinates;\n if (opt_right !== undefined) {\n flatCoordinates = this.getOrientedFlatCoordinates().slice();\n orientLinearRingsArray(\n flatCoordinates, 0, this.endss_, this.stride, opt_right);\n } else {\n flatCoordinates = this.flatCoordinates;\n }\n\n return inflateMultiCoordinatesArray(\n flatCoordinates, 0, this.endss_, this.stride);\n};\n\n\n/**\n * @return {Array.<Array.<number>>} Endss.\n */\nMultiPolygon.prototype.getEndss = function() {\n return this.endss_;\n};\n\n\n/**\n * @return {Array.<number>} Flat interior points.\n */\nMultiPolygon.prototype.getFlatInteriorPoints = function() {\n if (this.flatInteriorPointsRevision_ != this.getRevision()) {\n const flatCenters = linearRingssCenter(\n this.flatCoordinates, 0, this.endss_, this.stride);\n this.flatInteriorPoints_ = getInteriorPointsOfMultiArray(\n this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride,\n flatCenters);\n this.flatInteriorPointsRevision_ = this.getRevision();\n }\n return this.flatInteriorPoints_;\n};\n\n\n/**\n * Return the interior points as {@link module:ol/geom/MultiPoint multipoint}.\n * @return {module:ol/geom/MultiPoint} Interior points as XYM coordinates, where M is\n * the length of the horizontal intersection that the point belongs to.\n * @api\n */\nMultiPolygon.prototype.getInteriorPoints = function() {\n const interiorPoints = new MultiPoint(null);\n interiorPoints.setFlatCoordinates(GeometryLayout.XYM,\n this.getFlatInteriorPoints().slice());\n return interiorPoints;\n};\n\n\n/**\n * @return {Array.<number>} Oriented flat coordinates.\n */\nMultiPolygon.prototype.getOrientedFlatCoordinates = function() {\n if (this.orientedRevision_ != this.getRevision()) {\n const flatCoordinates = this.flatCoordinates;\n if (linearRingsAreOriented(\n flatCoordinates, 0, this.endss_, this.stride)) {\n this.orientedFlatCoordinates_ = flatCoordinates;\n } else {\n this.orientedFlatCoordinates_ = flatCoordinates.slice();\n this.orientedFlatCoordinates_.length =\n orientLinearRingsArray(\n this.orientedFlatCoordinates_, 0, this.endss_, this.stride);\n }\n this.orientedRevision_ = this.getRevision();\n }\n return this.orientedFlatCoordinates_;\n};\n\n\n/**\n * @inheritDoc\n */\nMultiPolygon.prototype.getSimplifiedGeometryInternal = function(squaredTolerance) {\n const simplifiedFlatCoordinates = [];\n const simplifiedEndss = [];\n simplifiedFlatCoordinates.length = quantizeMultiArray(\n this.flatCoordinates, 0, this.endss_, this.stride,\n Math.sqrt(squaredTolerance),\n simplifiedFlatCoordinates, 0, simplifiedEndss);\n const simplifiedMultiPolygon = new MultiPolygon(null);\n simplifiedMultiPolygon.setFlatCoordinates(\n GeometryLayout.XY, simplifiedFlatCoordinates, simplifiedEndss);\n return simplifiedMultiPolygon;\n};\n\n\n/**\n * Return the polygon at the specified index.\n * @param {number} index Index.\n * @return {module:ol/geom/Polygon} Polygon.\n * @api\n */\nMultiPolygon.prototype.getPolygon = function(index) {\n if (index < 0 || this.endss_.length <= index) {\n return null;\n }\n let offset;\n if (index === 0) {\n offset = 0;\n } else {\n const prevEnds = this.endss_[index - 1];\n offset = prevEnds[prevEnds.length - 1];\n }\n const ends = this.endss_[index].slice();\n const end = ends[ends.length - 1];\n if (offset !== 0) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n ends[i] -= offset;\n }\n }\n const polygon = new Polygon(null);\n polygon.setFlatCoordinates(\n this.layout, this.flatCoordinates.slice(offset, end), ends);\n return polygon;\n};\n\n\n/**\n * Return the polygons of this multipolygon.\n * @return {Array.<module:ol/geom/Polygon>} Polygons.\n * @api\n */\nMultiPolygon.prototype.getPolygons = function() {\n const layout = this.layout;\n const flatCoordinates = this.flatCoordinates;\n const endss = this.endss_;\n const polygons = [];\n let offset = 0;\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i].slice();\n const end = ends[ends.length - 1];\n if (offset !== 0) {\n for (let j = 0, jj = ends.length; j < jj; ++j) {\n ends[j] -= offset;\n }\n }\n const polygon = new Polygon(null);\n polygon.setFlatCoordinates(\n layout, flatCoordinates.slice(offset, end), ends);\n polygons.push(polygon);\n offset = end;\n }\n return polygons;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nMultiPolygon.prototype.getType = function() {\n return GeometryType.MULTI_POLYGON;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nMultiPolygon.prototype.intersectsExtent = function(extent) {\n return intersectsLinearRingMultiArray(\n this.getOrientedFlatCoordinates(), 0, this.endss_, this.stride, extent);\n};\n\n\n/**\n * Set the coordinates of the multipolygon.\n * @param {Array.<Array.<Array.<module:ol/coordinate~Coordinate>>>} coordinates Coordinates.\n * @param {module:ol/geom/GeometryLayout=} opt_layout Layout.\n * @override\n * @api\n */\nMultiPolygon.prototype.setCoordinates = function(coordinates, opt_layout) {\n if (!coordinates) {\n this.setFlatCoordinates(GeometryLayout.XY, null, this.endss_);\n } else {\n this.setLayout(opt_layout, coordinates, 3);\n if (!this.flatCoordinates) {\n this.flatCoordinates = [];\n }\n const endss = deflateMultiCoordinatesArray(\n this.flatCoordinates, 0, coordinates, this.stride, this.endss_);\n if (endss.length === 0) {\n this.flatCoordinates.length = 0;\n } else {\n const lastEnds = endss[endss.length - 1];\n this.flatCoordinates.length = lastEnds.length === 0 ?\n 0 : lastEnds[lastEnds.length - 1];\n }\n this.changed();\n }\n};\n\n\n/**\n * @param {module:ol/geom/GeometryLayout} layout Layout.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {Array.<Array.<number>>} endss Endss.\n */\nMultiPolygon.prototype.setFlatCoordinates = function(layout, flatCoordinates, endss) {\n this.setFlatCoordinatesInternal(layout, flatCoordinates);\n this.endss_ = endss;\n this.changed();\n};\n\n\n/**\n * @param {Array.<module:ol/geom/Polygon>} polygons Polygons.\n */\nMultiPolygon.prototype.setPolygons = function(polygons) {\n let layout = this.getLayout();\n const flatCoordinates = [];\n const endss = [];\n for (let i = 0, ii = polygons.length; i < ii; ++i) {\n const polygon = polygons[i];\n if (i === 0) {\n layout = polygon.getLayout();\n }\n const offset = flatCoordinates.length;\n const ends = polygon.getEnds();\n for (let j = 0, jj = ends.length; j < jj; ++j) {\n ends[j] += offset;\n }\n extend(flatCoordinates, polygon.getFlatCoordinates());\n endss.push(ends);\n }\n this.setFlatCoordinates(layout, flatCoordinates, endss);\n};\n\nexport default MultiPolygon;\n","/**\n * @module ol/LayerType\n */\n\n/**\n * A layer type used when creating layer renderers.\n * @enum {string}\n */\nexport default {\n IMAGE: 'IMAGE',\n TILE: 'TILE',\n VECTOR_TILE: 'VECTOR_TILE',\n VECTOR: 'VECTOR'\n};\n","/**\n * @module ol/layer/VectorRenderType\n */\n\n/**\n * @enum {string}\n * Render mode for vector layers:\n * * `'image'`: Vector layers are rendered as images. Great performance, but\n * point symbols and texts are always rotated with the view and pixels are\n * scaled during zoom animations.\n * * `'vector'`: Vector layers are rendered as vectors. Most accurate rendering\n * even during animations, but slower performance.\n * @api\n */\nexport default {\n IMAGE: 'image',\n VECTOR: 'vector'\n};\n","/**\n * @module ol/layer/Vector\n */\nimport {inherits} from '../util.js';\nimport LayerType from '../LayerType.js';\nimport Layer from '../layer/Layer.js';\nimport VectorRenderType from '../layer/VectorRenderType.js';\nimport {assign} from '../obj.js';\nimport {createDefaultStyle, toFunction as toStyleFunction} from '../style/Style.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {module:ol/extent~Extent} [extent] The bounding extent for layer rendering. The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex=0] The z-index for layer rendering. At rendering time, the layers\n * will be ordered, first by Z-index and then by position.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {module:ol/render~OrderFunction} [renderOrder] Render order. Function to be used when sorting\n * features before rendering. By default features are drawn in the order that they are created. Use\n * `null` to avoid the sort, but get an undefined draw order.\n * @property {number} [renderBuffer=100] The buffer in pixels around the viewport extent used by the\n * renderer when getting features from the vector source for the rendering or hit-detection.\n * Recommended value: the size of the largest symbol, line width or label.\n * @property {module:ol/layer/VectorRenderType|string} [renderMode='vector'] Render mode for vector layers:\n * * `'image'`: Vector layers are rendered as images. Great performance, but point symbols and\n * texts are always rotated with the view and pixels are scaled during zoom animations.\n * * `'vector'`: Vector layers are rendered as vectors. Most accurate rendering even during\n * animations, but slower performance.\n * @property {module:ol/source/Vector} [source] Source.\n * @property {module:ol/PluggableMap} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use {@link module:ol/Map#addLayer}.\n * @property {boolean} [declutter=false] Declutter images and text. Decluttering is applied to all\n * image and text styles, and the priority is defined by the z-index of the style. Lower z-index\n * means higher priority.\n * @property {module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction} [style] Layer style. See\n * {@link module:ol/style} for default style which will be used if this is not defined.\n * @property {boolean} [updateWhileAnimating=false] When set to `true` and `renderMode`\n * is `vector`, feature batches will be recreated during animations. This means that no\n * vectors will be shown clipped, but the setting will have a performance impact for large\n * amounts of vector data. When set to `false`, batches will be recreated when no animation\n * is active.\n * @property {boolean} [updateWhileInteracting=false] When set to `true` and `renderMode`\n * is `vector`, feature batches will be recreated during interactions. See also\n * `updateWhileAnimating`.\n */\n\n\n/**\n * @enum {string}\n * Render mode for vector layers:\n * * `'image'`: Vector layers are rendered as images. Great performance, but\n * point symbols and texts are always rotated with the view and pixels are\n * scaled during zoom animations.\n * * `'vector'`: Vector layers are rendered as vectors. Most accurate rendering\n * even during animations, but slower performance.\n * @api\n */\nexport const RenderType = {\n IMAGE: 'image',\n VECTOR: 'vector'\n};\n\n\n/**\n * @enum {string}\n * @private\n */\nconst Property = {\n RENDER_ORDER: 'renderOrder'\n};\n\n\n/**\n * @classdesc\n * Vector data that is rendered client-side.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @constructor\n * @extends {module:ol/layer/Layer}\n * @fires module:ol/render/Event~RenderEvent\n * @param {module:ol/layer/Vector~Options=} opt_options Options.\n * @api\n */\nconst VectorLayer = function(opt_options) {\n const options = opt_options ?\n opt_options : /** @type {module:ol/layer/Vector~Options} */ ({});\n\n const baseOptions = assign({}, options);\n\n delete baseOptions.style;\n delete baseOptions.renderBuffer;\n delete baseOptions.updateWhileAnimating;\n delete baseOptions.updateWhileInteracting;\n Layer.call(this, /** @type {module:ol/layer/Layer~Options} */ (baseOptions));\n\n /**\n * @private\n * @type {boolean}\n */\n this.declutter_ = options.declutter !== undefined ? options.declutter : false;\n\n /**\n * @type {number}\n * @private\n */\n this.renderBuffer_ = options.renderBuffer !== undefined ?\n options.renderBuffer : 100;\n\n /**\n * User provided style.\n * @type {module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction}\n * @private\n */\n this.style_ = null;\n\n /**\n * Style function for use within the library.\n * @type {module:ol/style/Style~StyleFunction|undefined}\n * @private\n */\n this.styleFunction_ = undefined;\n\n this.setStyle(options.style);\n\n /**\n * @type {boolean}\n * @private\n */\n this.updateWhileAnimating_ = options.updateWhileAnimating !== undefined ?\n options.updateWhileAnimating : false;\n\n /**\n * @type {boolean}\n * @private\n */\n this.updateWhileInteracting_ = options.updateWhileInteracting !== undefined ?\n options.updateWhileInteracting : false;\n\n /**\n * @private\n * @type {module:ol/layer/VectorTileRenderType|string}\n */\n this.renderMode_ = options.renderMode || VectorRenderType.VECTOR;\n\n /**\n * The layer type.\n * @protected\n * @type {module:ol/LayerType}\n */\n this.type = LayerType.VECTOR;\n\n};\n\ninherits(VectorLayer, Layer);\n\n\n/**\n * @return {boolean} Declutter.\n */\nVectorLayer.prototype.getDeclutter = function() {\n return this.declutter_;\n};\n\n\n/**\n * @param {boolean} declutter Declutter.\n */\nVectorLayer.prototype.setDeclutter = function(declutter) {\n this.declutter_ = declutter;\n};\n\n\n/**\n * @return {number|undefined} Render buffer.\n */\nVectorLayer.prototype.getRenderBuffer = function() {\n return this.renderBuffer_;\n};\n\n\n/**\n * @return {function(module:ol/Feature, module:ol/Feature): number|null|undefined} Render\n * order.\n */\nVectorLayer.prototype.getRenderOrder = function() {\n return (\n /** @type {module:ol/render~OrderFunction|null|undefined} */ (this.get(Property.RENDER_ORDER))\n );\n};\n\n\n/**\n * Return the associated {@link module:ol/source/Vector vectorsource} of the layer.\n * @function\n * @return {module:ol/source/Vector} Source.\n * @api\n */\nVectorLayer.prototype.getSource;\n\n\n/**\n * Get the style for features. This returns whatever was passed to the `style`\n * option at construction or to the `setStyle` method.\n * @return {module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction}\n * Layer style.\n * @api\n */\nVectorLayer.prototype.getStyle = function() {\n return this.style_;\n};\n\n\n/**\n * Get the style function.\n * @return {module:ol/style/Style~StyleFunction|undefined} Layer style function.\n * @api\n */\nVectorLayer.prototype.getStyleFunction = function() {\n return this.styleFunction_;\n};\n\n\n/**\n * @return {boolean} Whether the rendered layer should be updated while\n * animating.\n */\nVectorLayer.prototype.getUpdateWhileAnimating = function() {\n return this.updateWhileAnimating_;\n};\n\n\n/**\n * @return {boolean} Whether the rendered layer should be updated while\n * interacting.\n */\nVectorLayer.prototype.getUpdateWhileInteracting = function() {\n return this.updateWhileInteracting_;\n};\n\n\n/**\n * @param {module:ol/render~OrderFunction|null|undefined} renderOrder\n * Render order.\n */\nVectorLayer.prototype.setRenderOrder = function(renderOrder) {\n this.set(Property.RENDER_ORDER, renderOrder);\n};\n\n\n/**\n * Set the style for features. This can be a single style object, an array\n * of styles, or a function that takes a feature and resolution and returns\n * an array of styles. If it is `undefined` the default style is used. If\n * it is `null` the layer has no style (a `null` style), so only features\n * that have their own styles will be rendered in the layer. See\n * {@link module:ol/style} for information on the default style.\n * @param {module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction|null|undefined}\n * style Layer style.\n * @api\n */\nVectorLayer.prototype.setStyle = function(style) {\n this.style_ = style !== undefined ? style : createDefaultStyle;\n this.styleFunction_ = style === null ?\n undefined : toStyleFunction(this.style_);\n this.changed();\n};\n\n\n/**\n * @return {module:ol/layer/VectorRenderType|string} The render mode.\n */\nVectorLayer.prototype.getRenderMode = function() {\n return this.renderMode_;\n};\n\n\nexport default VectorLayer;\n","/**\n * @module ol/format/FormatType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n ARRAY_BUFFER: 'arraybuffer',\n JSON: 'json',\n TEXT: 'text',\n XML: 'xml'\n};\n","/**\n * @module ol/featureloader\n */\nimport {UNDEFINED} from './functions.js';\nimport FormatType from './format/FormatType.js';\n\n\n/**\n * {@link module:ol/source/Vector} sources use a function of this type to\n * load features.\n *\n * This function takes an {@link module:ol/extent~Extent} representing the area to be loaded,\n * a `{number}` representing the resolution (map units per pixel) and an\n * {@link module:ol/proj/Projection} for the projection as\n * arguments. `this` within the function is bound to the\n * {@link module:ol/source/Vector} it's called from.\n *\n * The function is responsible for loading the features and adding them to the\n * source.\n * @typedef {function(this:module:ol/source/Vector, module:ol/extent~Extent, number,\n * module:ol/proj/Projection)} FeatureLoader\n * @api\n */\n\n\n/**\n * {@link module:ol/source/Vector} sources use a function of this type to\n * get the url to load features from.\n *\n * This function takes an {@link module:ol/extent~Extent} representing the area\n * to be loaded, a `{number}` representing the resolution (map units per pixel)\n * and an {@link module:ol/proj/Projection} for the projection as\n * arguments and returns a `{string}` representing the URL.\n * @typedef {function(module:ol/extent~Extent, number, module:ol/proj/Projection): string} FeatureUrlFunction\n * @api\n */\n\n\n/**\n * @param {string|module:ol/featureloader~FeatureUrlFunction} url Feature URL service.\n * @param {module:ol/format/Feature} format Feature format.\n * @param {function(this:module:ol/VectorTile, Array.<module:ol/Feature>, module:ol/proj/Projection, module:ol/extent~Extent)|function(this:module:ol/source/Vector, Array.<module:ol/Feature>)} success\n * Function called with the loaded features and optionally with the data\n * projection. Called with the vector tile or source as `this`.\n * @param {function(this:module:ol/VectorTile)|function(this:module:ol/source/Vector)} failure\n * Function called when loading failed. Called with the vector tile or\n * source as `this`.\n * @return {module:ol/featureloader~FeatureLoader} The feature loader.\n */\nexport function loadFeaturesXhr(url, format, success, failure) {\n return (\n /**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {module:ol/proj/Projection} projection Projection.\n * @this {module:ol/source/Vector|module:ol/VectorTile}\n */\n function(extent, resolution, projection) {\n const xhr = new XMLHttpRequest();\n xhr.open('GET',\n typeof url === 'function' ? url(extent, resolution, projection) : url,\n true);\n if (format.getType() == FormatType.ARRAY_BUFFER) {\n xhr.responseType = 'arraybuffer';\n }\n /**\n * @param {Event} event Event.\n * @private\n */\n xhr.onload = function(event) {\n // status will be 0 for file:// urls\n if (!xhr.status || xhr.status >= 200 && xhr.status < 300) {\n const type = format.getType();\n /** @type {Document|Node|Object|string|undefined} */\n let source;\n if (type == FormatType.JSON || type == FormatType.TEXT) {\n source = xhr.responseText;\n } else if (type == FormatType.XML) {\n source = xhr.responseXML;\n if (!source) {\n source = new DOMParser().parseFromString(xhr.responseText, 'application/xml');\n }\n } else if (type == FormatType.ARRAY_BUFFER) {\n source = /** @type {ArrayBuffer} */ (xhr.response);\n }\n if (source) {\n success.call(this, format.readFeatures(source,\n {featureProjection: projection}),\n format.readProjection(source), format.getLastExtent());\n } else {\n failure.call(this);\n }\n } else {\n failure.call(this);\n }\n }.bind(this);\n /**\n * @private\n */\n xhr.onerror = function() {\n failure.call(this);\n }.bind(this);\n xhr.send();\n }\n );\n}\n\n\n/**\n * Create an XHR feature loader for a `url` and `format`. The feature loader\n * loads features (with XHR), parses the features, and adds them to the\n * vector source.\n * @param {string|module:ol/featureloader~FeatureUrlFunction} url Feature URL service.\n * @param {module:ol/format/Feature} format Feature format.\n * @return {module:ol/featureloader~FeatureLoader} The feature loader.\n * @api\n */\nexport function xhr(url, format) {\n return loadFeaturesXhr(url, format,\n /**\n * @param {Array.<module:ol/Feature>} features The loaded features.\n * @param {module:ol/proj/Projection} dataProjection Data\n * projection.\n * @this {module:ol/source/Vector}\n */\n function(features, dataProjection) {\n this.addFeatures(features);\n }, /* FIXME handle error */ UNDEFINED);\n}\n","/**\n * @module ol/loadingstrategy\n */\n\n\n/**\n * Strategy function for loading all features with a single request.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array.<module:ol/extent~Extent>} Extents.\n * @api\n */\nexport function all(extent, resolution) {\n return [[-Infinity, -Infinity, Infinity, Infinity]];\n}\n\n\n/**\n * Strategy function for loading features based on the view's extent and\n * resolution.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array.<module:ol/extent~Extent>} Extents.\n * @api\n */\nexport function bbox(extent, resolution) {\n return [extent];\n}\n\n\n/**\n * Creates a strategy function for loading features based on a tile grid.\n * @param {module:ol/tilegrid/TileGrid} tileGrid Tile grid.\n * @return {function(module:ol/extent~Extent, number): Array.<module:ol/extent~Extent>} Loading strategy.\n * @api\n */\nexport function tile(tileGrid) {\n return (\n /**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @return {Array.<module:ol/extent~Extent>} Extents.\n */\n function(extent, resolution) {\n const z = tileGrid.getZForResolution(resolution);\n const tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n /** @type {Array.<module:ol/extent~Extent>} */\n const extents = [];\n /** @type {module:ol/tilecoord~TileCoord} */\n const tileCoord = [z, 0, 0];\n for (tileCoord[1] = tileRange.minX; tileCoord[1] <= tileRange.maxX; ++tileCoord[1]) {\n for (tileCoord[2] = tileRange.minY; tileCoord[2] <= tileRange.maxY; ++tileCoord[2]) {\n extents.push(tileGrid.getTileCoordExtent(tileCoord));\n }\n }\n return extents;\n }\n );\n}\n","/**\n * @module ol/source/Source\n */\nimport {inherits} from '../util.js';\nimport {UNDEFINED} from '../functions.js';\nimport BaseObject from '../Object.js';\nimport {get as getProjection} from '../proj.js';\nimport SourceState from '../source/State.js';\n\n\n/**\n * A function that returns a string or an array of strings representing source\n * attributions.\n *\n * @typedef {function(module:ol/PluggableMap~FrameState): (string|Array.<string>)} Attribution\n */\n\n\n/**\n * A type that can be used to provide attribution information for data sources.\n *\n * It represents either\n * * a simple string (e.g. `'© Acme Inc.'`)\n * * an array of simple strings (e.g. `['© Acme Inc.', '© Bacme Inc.']`)\n * * a function that returns a string or array of strings (`{@link module:ol/source/Source~Attribution}`)\n *\n * @typedef {string|Array.<string>|module:ol/source/Source~Attribution} AttributionLike\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions]\n * @property {module:ol/proj~ProjectionLike} projection\n * @property {module:ol/source/State} [state]\n * @property {boolean} [wrapX]\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for {@link module:ol/layer/Layer~Layer} sources.\n *\n * A generic `change` event is triggered when the state of the source changes.\n *\n * @constructor\n * @abstract\n * @extends {module:ol/Object}\n * @param {module:ol/source/Source~Options} options Source options.\n * @api\n */\nconst Source = function(options) {\n\n BaseObject.call(this);\n\n /**\n * @private\n * @type {module:ol/proj/Projection}\n */\n this.projection_ = getProjection(options.projection);\n\n /**\n * @private\n * @type {?module:ol/source/Source~Attribution}\n */\n this.attributions_ = this.adaptAttributions_(options.attributions);\n\n /**\n * @private\n * @type {module:ol/source/State}\n */\n this.state_ = options.state !== undefined ?\n options.state : SourceState.READY;\n\n /**\n * @private\n * @type {boolean}\n */\n this.wrapX_ = options.wrapX !== undefined ? options.wrapX : false;\n\n};\n\ninherits(Source, BaseObject);\n\n/**\n * Turns the attributions option into an attributions function.\n * @param {module:ol/source/Source~AttributionLike|undefined} attributionLike The attribution option.\n * @return {?module:ol/source/Source~Attribution} An attribution function (or null).\n */\nSource.prototype.adaptAttributions_ = function(attributionLike) {\n if (!attributionLike) {\n return null;\n }\n if (Array.isArray(attributionLike)) {\n return function(frameState) {\n return attributionLike;\n };\n }\n\n if (typeof attributionLike === 'function') {\n return attributionLike;\n }\n\n return function(frameState) {\n return [attributionLike];\n };\n};\n\n/**\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {number} hitTolerance Hit tolerance in pixels.\n * @param {Object.<string, boolean>} skippedFeatureUids Skipped feature uids.\n * @param {function((module:ol/Feature|module:ol/render/Feature)): T} callback Feature callback.\n * @return {T|undefined} Callback result.\n * @template T\n */\nSource.prototype.forEachFeatureAtCoordinate = UNDEFINED;\n\n\n/**\n * Get the attribution function for the source.\n * @return {?module:ol/source/Source~Attribution} Attribution function.\n */\nSource.prototype.getAttributions = function() {\n return this.attributions_;\n};\n\n\n/**\n * Get the projection of the source.\n * @return {module:ol/proj/Projection} Projection.\n * @api\n */\nSource.prototype.getProjection = function() {\n return this.projection_;\n};\n\n\n/**\n * @abstract\n * @return {Array.<number>|undefined} Resolutions.\n */\nSource.prototype.getResolutions = function() {};\n\n\n/**\n * Get the state of the source, see {@link module:ol/source/State~State} for possible states.\n * @return {module:ol/source/State} State.\n * @api\n */\nSource.prototype.getState = function() {\n return this.state_;\n};\n\n\n/**\n * @return {boolean|undefined} Wrap X.\n */\nSource.prototype.getWrapX = function() {\n return this.wrapX_;\n};\n\n\n/**\n * Refreshes the source and finally dispatches a 'change' event.\n * @api\n */\nSource.prototype.refresh = function() {\n this.changed();\n};\n\n\n/**\n * Set the attributions of the source.\n * @param {module:ol/source/Source~AttributionLike|undefined} attributions Attributions.\n * Can be passed as `string`, `Array<string>`, `{@link module:ol/source/Source~Attribution}`,\n * or `undefined`.\n * @api\n */\nSource.prototype.setAttributions = function(attributions) {\n this.attributions_ = this.adaptAttributions_(attributions);\n this.changed();\n};\n\n\n/**\n * Set the state of the source.\n * @param {module:ol/source/State} state State.\n * @protected\n */\nSource.prototype.setState = function(state) {\n this.state_ = state;\n this.changed();\n};\nexport default Source;\n","/**\n * @module ol/source/VectorEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n /**\n * Triggered when a feature is added to the source.\n * @event ol/source/Vector~VectorSourceEvent#addfeature\n * @api\n */\n ADDFEATURE: 'addfeature',\n\n /**\n * Triggered when a feature is updated.\n * @event ol/source/Vector~VectorSourceEvent#changefeature\n * @api\n */\n CHANGEFEATURE: 'changefeature',\n\n /**\n * Triggered when the clear method is called on the source.\n * @event ol/source/Vector~VectorSourceEvent#clear\n * @api\n */\n CLEAR: 'clear',\n\n /**\n * Triggered when a feature is removed from the source.\n * See {@link module:ol/source/Vector#clear source.clear()} for exceptions.\n * @event ol/source/Vector~VectorSourceEvent#removefeature\n * @api\n */\n REMOVEFEATURE: 'removefeature'\n};\n","(function (global, factory) {\n\ttypeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :\n\ttypeof define === 'function' && define.amd ? define(factory) :\n\t(global.quickselect = factory());\n}(this, (function () { 'use strict';\n\nfunction quickselect(arr, k, left, right, compare) {\n quickselectStep(arr, k, left || 0, right || (arr.length - 1), compare || defaultCompare);\n}\n\nfunction quickselectStep(arr, k, left, right, compare) {\n\n while (right > left) {\n if (right - left > 600) {\n var n = right - left + 1;\n var m = k - left + 1;\n var z = Math.log(n);\n var s = 0.5 * Math.exp(2 * z / 3);\n var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);\n var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));\n var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));\n quickselectStep(arr, k, newLeft, newRight, compare);\n }\n\n var t = arr[k];\n var i = left;\n var j = right;\n\n swap(arr, left, k);\n if (compare(arr[right], t) > 0) swap(arr, left, right);\n\n while (i < j) {\n swap(arr, i, j);\n i++;\n j--;\n while (compare(arr[i], t) < 0) i++;\n while (compare(arr[j], t) > 0) j--;\n }\n\n if (compare(arr[left], t) === 0) swap(arr, left, j);\n else {\n j++;\n swap(arr, j, right);\n }\n\n if (j <= k) left = j + 1;\n if (k <= j) right = j - 1;\n }\n}\n\nfunction swap(arr, i, j) {\n var tmp = arr[i];\n arr[i] = arr[j];\n arr[j] = tmp;\n}\n\nfunction defaultCompare(a, b) {\n return a < b ? -1 : a > b ? 1 : 0;\n}\n\nreturn quickselect;\n\n})));\n","'use strict';\n\nmodule.exports = rbush;\nmodule.exports.default = rbush;\n\nvar quickselect = require('quickselect');\n\nfunction rbush(maxEntries, format) {\n if (!(this instanceof rbush)) return new rbush(maxEntries, format);\n\n // max entries in a node is 9 by default; min node fill is 40% for best performance\n this._maxEntries = Math.max(4, maxEntries || 9);\n this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));\n\n if (format) {\n this._initFormat(format);\n }\n\n this.clear();\n}\n\nrbush.prototype = {\n\n all: function () {\n return this._all(this.data, []);\n },\n\n search: function (bbox) {\n\n var node = this.data,\n result = [],\n toBBox = this.toBBox;\n\n if (!intersects(bbox, node)) return result;\n\n var nodesToSearch = [],\n i, len, child, childBBox;\n\n while (node) {\n for (i = 0, len = node.children.length; i < len; i++) {\n\n child = node.children[i];\n childBBox = node.leaf ? toBBox(child) : child;\n\n if (intersects(bbox, childBBox)) {\n if (node.leaf) result.push(child);\n else if (contains(bbox, childBBox)) this._all(child, result);\n else nodesToSearch.push(child);\n }\n }\n node = nodesToSearch.pop();\n }\n\n return result;\n },\n\n collides: function (bbox) {\n\n var node = this.data,\n toBBox = this.toBBox;\n\n if (!intersects(bbox, node)) return false;\n\n var nodesToSearch = [],\n i, len, child, childBBox;\n\n while (node) {\n for (i = 0, len = node.children.length; i < len; i++) {\n\n child = node.children[i];\n childBBox = node.leaf ? toBBox(child) : child;\n\n if (intersects(bbox, childBBox)) {\n if (node.leaf || contains(bbox, childBBox)) return true;\n nodesToSearch.push(child);\n }\n }\n node = nodesToSearch.pop();\n }\n\n return false;\n },\n\n load: function (data) {\n if (!(data && data.length)) return this;\n\n if (data.length < this._minEntries) {\n for (var i = 0, len = data.length; i < len; i++) {\n this.insert(data[i]);\n }\n return this;\n }\n\n // recursively build the tree with the given data from scratch using OMT algorithm\n var node = this._build(data.slice(), 0, data.length - 1, 0);\n\n if (!this.data.children.length) {\n // save as is if tree is empty\n this.data = node;\n\n } else if (this.data.height === node.height) {\n // split root if trees have the same height\n this._splitRoot(this.data, node);\n\n } else {\n if (this.data.height < node.height) {\n // swap trees if inserted one is bigger\n var tmpNode = this.data;\n this.data = node;\n node = tmpNode;\n }\n\n // insert the small tree into the large tree at appropriate level\n this._insert(node, this.data.height - node.height - 1, true);\n }\n\n return this;\n },\n\n insert: function (item) {\n if (item) this._insert(item, this.data.height - 1);\n return this;\n },\n\n clear: function () {\n this.data = createNode([]);\n return this;\n },\n\n remove: function (item, equalsFn) {\n if (!item) return this;\n\n var node = this.data,\n bbox = this.toBBox(item),\n path = [],\n indexes = [],\n i, parent, index, goingUp;\n\n // depth-first iterative tree traversal\n while (node || path.length) {\n\n if (!node) { // go up\n node = path.pop();\n parent = path[path.length - 1];\n i = indexes.pop();\n goingUp = true;\n }\n\n if (node.leaf) { // check current node\n index = findItem(item, node.children, equalsFn);\n\n if (index !== -1) {\n // item found, remove the item and condense tree upwards\n node.children.splice(index, 1);\n path.push(node);\n this._condense(path);\n return this;\n }\n }\n\n if (!goingUp && !node.leaf && contains(node, bbox)) { // go down\n path.push(node);\n indexes.push(i);\n i = 0;\n parent = node;\n node = node.children[0];\n\n } else if (parent) { // go right\n i++;\n node = parent.children[i];\n goingUp = false;\n\n } else node = null; // nothing found\n }\n\n return this;\n },\n\n toBBox: function (item) { return item; },\n\n compareMinX: compareNodeMinX,\n compareMinY: compareNodeMinY,\n\n toJSON: function () { return this.data; },\n\n fromJSON: function (data) {\n this.data = data;\n return this;\n },\n\n _all: function (node, result) {\n var nodesToSearch = [];\n while (node) {\n if (node.leaf) result.push.apply(result, node.children);\n else nodesToSearch.push.apply(nodesToSearch, node.children);\n\n node = nodesToSearch.pop();\n }\n return result;\n },\n\n _build: function (items, left, right, height) {\n\n var N = right - left + 1,\n M = this._maxEntries,\n node;\n\n if (N <= M) {\n // reached leaf level; return leaf\n node = createNode(items.slice(left, right + 1));\n calcBBox(node, this.toBBox);\n return node;\n }\n\n if (!height) {\n // target height of the bulk-loaded tree\n height = Math.ceil(Math.log(N) / Math.log(M));\n\n // target number of root entries to maximize storage utilization\n M = Math.ceil(N / Math.pow(M, height - 1));\n }\n\n node = createNode([]);\n node.leaf = false;\n node.height = height;\n\n // split the items into M mostly square tiles\n\n var N2 = Math.ceil(N / M),\n N1 = N2 * Math.ceil(Math.sqrt(M)),\n i, j, right2, right3;\n\n multiSelect(items, left, right, N1, this.compareMinX);\n\n for (i = left; i <= right; i += N1) {\n\n right2 = Math.min(i + N1 - 1, right);\n\n multiSelect(items, i, right2, N2, this.compareMinY);\n\n for (j = i; j <= right2; j += N2) {\n\n right3 = Math.min(j + N2 - 1, right2);\n\n // pack each entry recursively\n node.children.push(this._build(items, j, right3, height - 1));\n }\n }\n\n calcBBox(node, this.toBBox);\n\n return node;\n },\n\n _chooseSubtree: function (bbox, node, level, path) {\n\n var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;\n\n while (true) {\n path.push(node);\n\n if (node.leaf || path.length - 1 === level) break;\n\n minArea = minEnlargement = Infinity;\n\n for (i = 0, len = node.children.length; i < len; i++) {\n child = node.children[i];\n area = bboxArea(child);\n enlargement = enlargedArea(bbox, child) - area;\n\n // choose entry with the least area enlargement\n if (enlargement < minEnlargement) {\n minEnlargement = enlargement;\n minArea = area < minArea ? area : minArea;\n targetNode = child;\n\n } else if (enlargement === minEnlargement) {\n // otherwise choose one with the smallest area\n if (area < minArea) {\n minArea = area;\n targetNode = child;\n }\n }\n }\n\n node = targetNode || node.children[0];\n }\n\n return node;\n },\n\n _insert: function (item, level, isNode) {\n\n var toBBox = this.toBBox,\n bbox = isNode ? item : toBBox(item),\n insertPath = [];\n\n // find the best node for accommodating the item, saving all nodes along the path too\n var node = this._chooseSubtree(bbox, this.data, level, insertPath);\n\n // put the item into the node\n node.children.push(item);\n extend(node, bbox);\n\n // split on node overflow; propagate upwards if necessary\n while (level >= 0) {\n if (insertPath[level].children.length > this._maxEntries) {\n this._split(insertPath, level);\n level--;\n } else break;\n }\n\n // adjust bboxes along the insertion path\n this._adjustParentBBoxes(bbox, insertPath, level);\n },\n\n // split overflowed node into two\n _split: function (insertPath, level) {\n\n var node = insertPath[level],\n M = node.children.length,\n m = this._minEntries;\n\n this._chooseSplitAxis(node, m, M);\n\n var splitIndex = this._chooseSplitIndex(node, m, M);\n\n var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));\n newNode.height = node.height;\n newNode.leaf = node.leaf;\n\n calcBBox(node, this.toBBox);\n calcBBox(newNode, this.toBBox);\n\n if (level) insertPath[level - 1].children.push(newNode);\n else this._splitRoot(node, newNode);\n },\n\n _splitRoot: function (node, newNode) {\n // split root node\n this.data = createNode([node, newNode]);\n this.data.height = node.height + 1;\n this.data.leaf = false;\n calcBBox(this.data, this.toBBox);\n },\n\n _chooseSplitIndex: function (node, m, M) {\n\n var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;\n\n minOverlap = minArea = Infinity;\n\n for (i = m; i <= M - m; i++) {\n bbox1 = distBBox(node, 0, i, this.toBBox);\n bbox2 = distBBox(node, i, M, this.toBBox);\n\n overlap = intersectionArea(bbox1, bbox2);\n area = bboxArea(bbox1) + bboxArea(bbox2);\n\n // choose distribution with minimum overlap\n if (overlap < minOverlap) {\n minOverlap = overlap;\n index = i;\n\n minArea = area < minArea ? area : minArea;\n\n } else if (overlap === minOverlap) {\n // otherwise choose distribution with minimum area\n if (area < minArea) {\n minArea = area;\n index = i;\n }\n }\n }\n\n return index;\n },\n\n // sorts node children by the best axis for split\n _chooseSplitAxis: function (node, m, M) {\n\n var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX,\n compareMinY = node.leaf ? this.compareMinY : compareNodeMinY,\n xMargin = this._allDistMargin(node, m, M, compareMinX),\n yMargin = this._allDistMargin(node, m, M, compareMinY);\n\n // if total distributions margin value is minimal for x, sort by minX,\n // otherwise it's already sorted by minY\n if (xMargin < yMargin) node.children.sort(compareMinX);\n },\n\n // total margin of all possible split distributions where each node is at least m full\n _allDistMargin: function (node, m, M, compare) {\n\n node.children.sort(compare);\n\n var toBBox = this.toBBox,\n leftBBox = distBBox(node, 0, m, toBBox),\n rightBBox = distBBox(node, M - m, M, toBBox),\n margin = bboxMargin(leftBBox) + bboxMargin(rightBBox),\n i, child;\n\n for (i = m; i < M - m; i++) {\n child = node.children[i];\n extend(leftBBox, node.leaf ? toBBox(child) : child);\n margin += bboxMargin(leftBBox);\n }\n\n for (i = M - m - 1; i >= m; i--) {\n child = node.children[i];\n extend(rightBBox, node.leaf ? toBBox(child) : child);\n margin += bboxMargin(rightBBox);\n }\n\n return margin;\n },\n\n _adjustParentBBoxes: function (bbox, path, level) {\n // adjust bboxes along the given tree path\n for (var i = level; i >= 0; i--) {\n extend(path[i], bbox);\n }\n },\n\n _condense: function (path) {\n // go through the path, removing empty nodes and updating bboxes\n for (var i = path.length - 1, siblings; i >= 0; i--) {\n if (path[i].children.length === 0) {\n if (i > 0) {\n siblings = path[i - 1].children;\n siblings.splice(siblings.indexOf(path[i]), 1);\n\n } else this.clear();\n\n } else calcBBox(path[i], this.toBBox);\n }\n },\n\n _initFormat: function (format) {\n // data format (minX, minY, maxX, maxY accessors)\n\n // uses eval-type function compilation instead of just accepting a toBBox function\n // because the algorithms are very sensitive to sorting functions performance,\n // so they should be dead simple and without inner calls\n\n var compareArr = ['return a', ' - b', ';'];\n\n this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));\n this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));\n\n this.toBBox = new Function('a',\n 'return {minX: a' + format[0] +\n ', minY: a' + format[1] +\n ', maxX: a' + format[2] +\n ', maxY: a' + format[3] + '};');\n }\n};\n\nfunction findItem(item, items, equalsFn) {\n if (!equalsFn) return items.indexOf(item);\n\n for (var i = 0; i < items.length; i++) {\n if (equalsFn(item, items[i])) return i;\n }\n return -1;\n}\n\n// calculate node's bbox from bboxes of its children\nfunction calcBBox(node, toBBox) {\n distBBox(node, 0, node.children.length, toBBox, node);\n}\n\n// min bounding rectangle of node children from k to p-1\nfunction distBBox(node, k, p, toBBox, destNode) {\n if (!destNode) destNode = createNode(null);\n destNode.minX = Infinity;\n destNode.minY = Infinity;\n destNode.maxX = -Infinity;\n destNode.maxY = -Infinity;\n\n for (var i = k, child; i < p; i++) {\n child = node.children[i];\n extend(destNode, node.leaf ? toBBox(child) : child);\n }\n\n return destNode;\n}\n\nfunction extend(a, b) {\n a.minX = Math.min(a.minX, b.minX);\n a.minY = Math.min(a.minY, b.minY);\n a.maxX = Math.max(a.maxX, b.maxX);\n a.maxY = Math.max(a.maxY, b.maxY);\n return a;\n}\n\nfunction compareNodeMinX(a, b) { return a.minX - b.minX; }\nfunction compareNodeMinY(a, b) { return a.minY - b.minY; }\n\nfunction bboxArea(a) { return (a.maxX - a.minX) * (a.maxY - a.minY); }\nfunction bboxMargin(a) { return (a.maxX - a.minX) + (a.maxY - a.minY); }\n\nfunction enlargedArea(a, b) {\n return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) *\n (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));\n}\n\nfunction intersectionArea(a, b) {\n var minX = Math.max(a.minX, b.minX),\n minY = Math.max(a.minY, b.minY),\n maxX = Math.min(a.maxX, b.maxX),\n maxY = Math.min(a.maxY, b.maxY);\n\n return Math.max(0, maxX - minX) *\n Math.max(0, maxY - minY);\n}\n\nfunction contains(a, b) {\n return a.minX <= b.minX &&\n a.minY <= b.minY &&\n b.maxX <= a.maxX &&\n b.maxY <= a.maxY;\n}\n\nfunction intersects(a, b) {\n return b.minX <= a.maxX &&\n b.minY <= a.maxY &&\n b.maxX >= a.minX &&\n b.maxY >= a.minY;\n}\n\nfunction createNode(children) {\n return {\n children: children,\n height: 1,\n leaf: true,\n minX: Infinity,\n minY: Infinity,\n maxX: -Infinity,\n maxY: -Infinity\n };\n}\n\n// sort an array so that items come in groups of n unsorted items, with groups sorted between each other;\n// combines selection algorithm with binary divide & conquer approach\n\nfunction multiSelect(arr, left, right, n, compare) {\n var stack = [left, right],\n mid;\n\n while (stack.length) {\n right = stack.pop();\n left = stack.pop();\n\n if (right - left <= n) continue;\n\n mid = left + Math.ceil((right - left) / n / 2) * n;\n quickselect(arr, mid, left, right, compare);\n\n stack.push(left, mid, mid, right);\n }\n}\n","/**\n * @module ol/structs/RBush\n */\nimport {getUid} from '../util.js';\nimport rbush from 'rbush';\nimport {createOrUpdate, equals} from '../extent.js';\nimport {isEmpty} from '../obj.js';\n\n/**\n * @typedef {Object} Entry\n * @property {number} minX\n * @property {number} minY\n * @property {number} maxX\n * @property {number} maxY\n * @property {Object} [value]\n */\n\n/**\n * Wrapper around the RBush by Vladimir Agafonkin.\n *\n * @constructor\n * @param {number=} opt_maxEntries Max entries.\n * @see https://github.com/mourner/rbush\n * @struct\n * @template T\n */\nconst RBush = function(opt_maxEntries) {\n\n /**\n * @private\n */\n this.rbush_ = rbush(opt_maxEntries, undefined);\n\n /**\n * A mapping between the objects added to this rbush wrapper\n * and the objects that are actually added to the internal rbush.\n * @private\n * @type {Object.<number, module:ol/structs/RBush~Entry>}\n */\n this.items_ = {};\n\n};\n\n\n/**\n * Insert a value into the RBush.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {T} value Value.\n */\nRBush.prototype.insert = function(extent, value) {\n /** @type {module:ol/structs/RBush~Entry} */\n const item = {\n minX: extent[0],\n minY: extent[1],\n maxX: extent[2],\n maxY: extent[3],\n value: value\n };\n\n this.rbush_.insert(item);\n this.items_[getUid(value)] = item;\n};\n\n\n/**\n * Bulk-insert values into the RBush.\n * @param {Array.<module:ol/extent~Extent>} extents Extents.\n * @param {Array.<T>} values Values.\n */\nRBush.prototype.load = function(extents, values) {\n const items = new Array(values.length);\n for (let i = 0, l = values.length; i < l; i++) {\n const extent = extents[i];\n const value = values[i];\n\n /** @type {module:ol/structs/RBush~Entry} */\n const item = {\n minX: extent[0],\n minY: extent[1],\n maxX: extent[2],\n maxY: extent[3],\n value: value\n };\n items[i] = item;\n this.items_[getUid(value)] = item;\n }\n this.rbush_.load(items);\n};\n\n\n/**\n * Remove a value from the RBush.\n * @param {T} value Value.\n * @return {boolean} Removed.\n */\nRBush.prototype.remove = function(value) {\n const uid = getUid(value);\n\n // get the object in which the value was wrapped when adding to the\n // internal rbush. then use that object to do the removal.\n const item = this.items_[uid];\n delete this.items_[uid];\n return this.rbush_.remove(item) !== null;\n};\n\n\n/**\n * Update the extent of a value in the RBush.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {T} value Value.\n */\nRBush.prototype.update = function(extent, value) {\n const item = this.items_[getUid(value)];\n const bbox = [item.minX, item.minY, item.maxX, item.maxY];\n if (!equals(bbox, extent)) {\n this.remove(value);\n this.insert(extent, value);\n }\n};\n\n\n/**\n * Return all values in the RBush.\n * @return {Array.<T>} All.\n */\nRBush.prototype.getAll = function() {\n const items = this.rbush_.all();\n return items.map(function(item) {\n return item.value;\n });\n};\n\n\n/**\n * Return all values in the given extent.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {Array.<T>} All in extent.\n */\nRBush.prototype.getInExtent = function(extent) {\n /** @type {module:ol/structs/RBush~Entry} */\n const bbox = {\n minX: extent[0],\n minY: extent[1],\n maxX: extent[2],\n maxY: extent[3]\n };\n const items = this.rbush_.search(bbox);\n return items.map(function(item) {\n return item.value;\n });\n};\n\n\n/**\n * Calls a callback function with each value in the tree.\n * If the callback returns a truthy value, this value is returned without\n * checking the rest of the tree.\n * @param {function(this: S, T): *} callback Callback.\n * @param {S=} opt_this The object to use as `this` in `callback`.\n * @return {*} Callback return value.\n * @template S\n */\nRBush.prototype.forEach = function(callback, opt_this) {\n return this.forEach_(this.getAll(), callback, opt_this);\n};\n\n\n/**\n * Calls a callback function with each value in the provided extent.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {function(this: S, T): *} callback Callback.\n * @param {S=} opt_this The object to use as `this` in `callback`.\n * @return {*} Callback return value.\n * @template S\n */\nRBush.prototype.forEachInExtent = function(extent, callback, opt_this) {\n return this.forEach_(this.getInExtent(extent), callback, opt_this);\n};\n\n\n/**\n * @param {Array.<T>} values Values.\n * @param {function(this: S, T): *} callback Callback.\n * @param {S=} opt_this The object to use as `this` in `callback`.\n * @private\n * @return {*} Callback return value.\n * @template S\n */\nRBush.prototype.forEach_ = function(values, callback, opt_this) {\n let result;\n for (let i = 0, l = values.length; i < l; i++) {\n result = callback.call(opt_this, values[i]);\n if (result) {\n return result;\n }\n }\n return result;\n};\n\n\n/**\n * @return {boolean} Is empty.\n */\nRBush.prototype.isEmpty = function() {\n return isEmpty(this.items_);\n};\n\n\n/**\n * Remove all values from the RBush.\n */\nRBush.prototype.clear = function() {\n this.rbush_.clear();\n this.items_ = {};\n};\n\n\n/**\n * @param {module:ol/extent~Extent=} opt_extent Extent.\n * @return {module:ol/extent~Extent} Extent.\n */\nRBush.prototype.getExtent = function(opt_extent) {\n // FIXME add getExtent() to rbush\n const data = this.rbush_.data;\n return createOrUpdate(data.minX, data.minY, data.maxX, data.maxY, opt_extent);\n};\n\n\n/**\n * @param {module:ol/structs/RBush} rbush R-Tree.\n */\nRBush.prototype.concat = function(rbush) {\n this.rbush_.load(rbush.rbush_.all());\n for (const i in rbush.items_) {\n this.items_[i | 0] = rbush.items_[i | 0];\n }\n};\nexport default RBush;\n","/**\n * @module ol/source/Vector\n */\n\nimport {getUid, inherits} from '../util.js';\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport {extend} from '../array.js';\nimport {assert} from '../asserts.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport {containsExtent, equals} from '../extent.js';\nimport {xhr} from '../featureloader.js';\nimport {TRUE, UNDEFINED} from '../functions.js';\nimport {all as allStrategy} from '../loadingstrategy.js';\nimport {isEmpty, getValues} from '../obj.js';\nimport Source from '../source/Source.js';\nimport SourceState from '../source/State.js';\nimport VectorEventType from '../source/VectorEventType.js';\nimport RBush from '../structs/RBush.js';\n\n/**\n * A function that takes an {@link module:ol/extent~Extent} and a resolution as arguments, and\n * returns an array of {@link module:ol/extent~Extent} with the extents to load. Usually this\n * is one of the standard {@link module:ol/loadingstrategy} strategies.\n *\n * @typedef {function(module:ol/extent~Extent, number): Array.<module:ol/extent~Extent>} LoadingStrategy\n * @api\n */\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Vector} instances are instances of this\n * type.\n *\n * @constructor\n * @extends {module:ol/events/Event}\n * @param {string} type Type.\n * @param {module:ol/Feature=} opt_feature Feature.\n */\nexport const VectorSourceEvent = function(type, opt_feature) {\n\n Event.call(this, type);\n\n /**\n * The feature being added or removed.\n * @type {module:ol/Feature|undefined}\n * @api\n */\n this.feature = opt_feature;\n\n};\ninherits(VectorSourceEvent, Event);\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {Array.<module:ol/Feature>|module:ol/Collection.<module:ol/Feature>} [features]\n * Features. If provided as {@link module:ol/Collection}, the features in the source\n * and the collection will stay in sync.\n * @property {module:ol/format/Feature} [format] The feature format used by the XHR\n * feature loader when `url` is set. Required if `url` is set, otherwise ignored.\n * @property {module:ol/featureloader~FeatureLoader} [loader]\n * The loader function used to load features, from a remote source for example.\n * If this is not set and `url` is set, the source will create and use an XHR\n * feature loader.\n *\n * Example:\n *\n * ```js\n * import {Vector} from 'ol/source';\n * import {GeoJSON} from 'ol/format';\n * import {bbox} from 'ol/loadingstrategy';\n *\n * var vectorSource = new Vector({\n * format: new GeoJSON(),\n * loader: function(extent, resolution, projection) {\n * var proj = projection.getCode();\n * var url = 'https://ahocevar.com/geoserver/wfs?service=WFS&' +\n * 'version=1.1.0&request=GetFeature&typename=osm:water_areas&' +\n * 'outputFormat=application/json&srsname=' + proj + '&' +\n * 'bbox=' + extent.join(',') + ',' + proj;\n * var xhr = new XMLHttpRequest();\n * xhr.open('GET', url);\n * var onError = function() {\n * vectorSource.removeLoadedExtent(extent);\n * }\n * xhr.onerror = onError;\n * xhr.onload = function() {\n * if (xhr.status == 200) {\n * vectorSource.addFeatures(\n * vectorSource.getFormat().readFeatures(xhr.responseText));\n * } else {\n * onError();\n * }\n * }\n * xhr.send();\n * },\n * strategy: bbox\n * });\n * ```\n * @property {boolean} [overlaps=true] This source may have overlapping geometries.\n * Setting this to `false` (e.g. for sources with polygons that represent administrative\n * boundaries or TopoJSON sources) allows the renderer to optimise fill and\n * stroke operations.\n * @property {module:ol/source/Vector~LoadingStrategy} [strategy] The loading strategy to use.\n * By default an {@link module:ol/loadingstrategy~all}\n * strategy is used, a one-off strategy which loads all features at once.\n * @property {string|module:ol/featureloader~FeatureUrlfunction} [url]\n * Setting this option instructs the source to load features using an XHR loader\n * (see {@link module:ol/featureloader~xhr}). Use a `string` and an\n * {@link module:ol/loadingstrategy~all} for a one-off download of all features from\n * the given URL. Use a {@link module:ol/featureloader~FeatureUrlfunction} to generate the url with\n * other loading strategies.\n * Requires `format` to be set as well.\n * When default XHR feature loader is provided, the features will\n * be transformed from the data projection to the view projection\n * during parsing. If your remote data source does not advertise its projection\n * properly, this transformation will be incorrect. For some formats, the\n * default projection (usually EPSG:4326) can be overridden by setting the\n * dataProjection constructor option on the format.\n * Note that if a source contains non-feature data, such as a GeoJSON geometry\n * or a KML NetworkLink, these will be ignored. Use a custom loader to load these.\n * @property {boolean} [useSpatialIndex=true]\n * By default, an RTree is used as spatial index. When features are removed and\n * added frequently, and the total number of features is low, setting this to\n * `false` may improve performance.\n *\n * Note that\n * {@link module:ol/source/Vector~VectorSource#getFeaturesInExtent},\n * {@link module:ol/source/Vector~VectorSource#getClosestFeatureToCoordinate} and\n * {@link module:ol/source/Vector~VectorSource#getExtent} cannot be used when `useSpatialIndex` is\n * set to `false`, and {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent} will loop\n * through all features.\n *\n * When set to `false`, the features will be maintained in an\n * {@link module:ol/Collection}, which can be retrieved through\n * {@link module:ol/source/Vector~VectorSource#getFeaturesCollection}.\n * @property {boolean} [wrapX=true] Wrap the world horizontally. For vector editing across the\n * -180° and 180° meridians to work properly, this should be set to `false`. The\n * resulting geometry coordinates will then exceed the world bounds.\n */\n\n\n/**\n * @classdesc\n * Provides a source of features for vector layers. Vector features provided\n * by this source are suitable for editing. See {@link module:ol/source/VectorTile~VectorTile} for\n * vector data that is optimized for rendering.\n *\n * @constructor\n * @extends {module:ol/source/Source}\n * @fires ol/source/Vector~VectorSourceEvent\n * @param {module:ol/source/Vector~Options=} opt_options Vector source options.\n * @api\n */\nconst VectorSource = function(opt_options) {\n\n const options = opt_options || {};\n\n Source.call(this, {\n attributions: options.attributions,\n projection: undefined,\n state: SourceState.READY,\n wrapX: options.wrapX !== undefined ? options.wrapX : true\n });\n\n /**\n * @private\n * @type {module:ol/featureloader~FeatureLoader}\n */\n this.loader_ = UNDEFINED;\n\n /**\n * @private\n * @type {module:ol/format/Feature|undefined}\n */\n this.format_ = options.format;\n\n /**\n * @private\n * @type {boolean}\n */\n this.overlaps_ = options.overlaps == undefined ? true : options.overlaps;\n\n /**\n * @private\n * @type {string|module:ol/featureloader~FeatureUrlFunction|undefined}\n */\n this.url_ = options.url;\n\n if (options.loader !== undefined) {\n this.loader_ = options.loader;\n } else if (this.url_ !== undefined) {\n assert(this.format_, 7); // `format` must be set when `url` is set\n // create a XHR feature loader for \"url\" and \"format\"\n this.loader_ = xhr(this.url_, /** @type {module:ol/format/Feature} */ (this.format_));\n }\n\n /**\n * @private\n * @type {module:ol/source/Vector~LoadingStrategy}\n */\n this.strategy_ = options.strategy !== undefined ? options.strategy : allStrategy;\n\n const useSpatialIndex =\n options.useSpatialIndex !== undefined ? options.useSpatialIndex : true;\n\n /**\n * @private\n * @type {module:ol/structs/RBush.<module:ol/Feature>}\n */\n this.featuresRtree_ = useSpatialIndex ? new RBush() : null;\n\n /**\n * @private\n * @type {module:ol/structs/RBush.<{extent: module:ol/extent~Extent}>}\n */\n this.loadedExtentsRtree_ = new RBush();\n\n /**\n * @private\n * @type {!Object.<string, module:ol/Feature>}\n */\n this.nullGeometryFeatures_ = {};\n\n /**\n * A lookup of features by id (the return from feature.getId()).\n * @private\n * @type {!Object.<string, module:ol/Feature>}\n */\n this.idIndex_ = {};\n\n /**\n * A lookup of features without id (keyed by getUid(feature)).\n * @private\n * @type {!Object.<string, module:ol/Feature>}\n */\n this.undefIdIndex_ = {};\n\n /**\n * @private\n * @type {Object.<string, Array.<module:ol/events~EventsKey>>}\n */\n this.featureChangeKeys_ = {};\n\n /**\n * @private\n * @type {module:ol/Collection.<module:ol/Feature>}\n */\n this.featuresCollection_ = null;\n\n let collection, features;\n if (options.features instanceof Collection) {\n collection = options.features;\n features = collection.getArray();\n } else if (Array.isArray(options.features)) {\n features = options.features;\n }\n if (!useSpatialIndex && collection === undefined) {\n collection = new Collection(features);\n }\n if (features !== undefined) {\n this.addFeaturesInternal(features);\n }\n if (collection !== undefined) {\n this.bindFeaturesCollection_(collection);\n }\n\n};\n\ninherits(VectorSource, Source);\n\n\n/**\n * Add a single feature to the source. If you want to add a batch of features\n * at once, call {@link module:ol/source/Vector~VectorSource#addFeatures #addFeatures()}\n * instead. A feature will not be added to the source if feature with\n * the same id is already there. The reason for this behavior is to avoid\n * feature duplication when using bbox or tile loading strategies.\n * @param {module:ol/Feature} feature Feature to add.\n * @api\n */\nVectorSource.prototype.addFeature = function(feature) {\n this.addFeatureInternal(feature);\n this.changed();\n};\n\n\n/**\n * Add a feature without firing a `change` event.\n * @param {module:ol/Feature} feature Feature.\n * @protected\n */\nVectorSource.prototype.addFeatureInternal = function(feature) {\n const featureKey = getUid(feature).toString();\n\n if (!this.addToIndex_(featureKey, feature)) {\n return;\n }\n\n this.setupChangeEvents_(featureKey, feature);\n\n const geometry = feature.getGeometry();\n if (geometry) {\n const extent = geometry.getExtent();\n if (this.featuresRtree_) {\n this.featuresRtree_.insert(extent, feature);\n }\n } else {\n this.nullGeometryFeatures_[featureKey] = feature;\n }\n\n this.dispatchEvent(\n new VectorSourceEvent(VectorEventType.ADDFEATURE, feature));\n};\n\n\n/**\n * @param {string} featureKey Unique identifier for the feature.\n * @param {module:ol/Feature} feature The feature.\n * @private\n */\nVectorSource.prototype.setupChangeEvents_ = function(featureKey, feature) {\n this.featureChangeKeys_[featureKey] = [\n listen(feature, EventType.CHANGE,\n this.handleFeatureChange_, this),\n listen(feature, ObjectEventType.PROPERTYCHANGE,\n this.handleFeatureChange_, this)\n ];\n};\n\n\n/**\n * @param {string} featureKey Unique identifier for the feature.\n * @param {module:ol/Feature} feature The feature.\n * @return {boolean} The feature is \"valid\", in the sense that it is also a\n * candidate for insertion into the Rtree.\n * @private\n */\nVectorSource.prototype.addToIndex_ = function(featureKey, feature) {\n let valid = true;\n const id = feature.getId();\n if (id !== undefined) {\n if (!(id.toString() in this.idIndex_)) {\n this.idIndex_[id.toString()] = feature;\n } else {\n valid = false;\n }\n } else {\n assert(!(featureKey in this.undefIdIndex_),\n 30); // The passed `feature` was already added to the source\n this.undefIdIndex_[featureKey] = feature;\n }\n return valid;\n};\n\n\n/**\n * Add a batch of features to the source.\n * @param {Array.<module:ol/Feature>} features Features to add.\n * @api\n */\nVectorSource.prototype.addFeatures = function(features) {\n this.addFeaturesInternal(features);\n this.changed();\n};\n\n\n/**\n * Add features without firing a `change` event.\n * @param {Array.<module:ol/Feature>} features Features.\n * @protected\n */\nVectorSource.prototype.addFeaturesInternal = function(features) {\n const extents = [];\n const newFeatures = [];\n const geometryFeatures = [];\n\n for (let i = 0, length = features.length; i < length; i++) {\n const feature = features[i];\n const featureKey = getUid(feature).toString();\n if (this.addToIndex_(featureKey, feature)) {\n newFeatures.push(feature);\n }\n }\n\n for (let i = 0, length = newFeatures.length; i < length; i++) {\n const feature = newFeatures[i];\n const featureKey = getUid(feature).toString();\n this.setupChangeEvents_(featureKey, feature);\n\n const geometry = feature.getGeometry();\n if (geometry) {\n const extent = geometry.getExtent();\n extents.push(extent);\n geometryFeatures.push(feature);\n } else {\n this.nullGeometryFeatures_[featureKey] = feature;\n }\n }\n if (this.featuresRtree_) {\n this.featuresRtree_.load(extents, geometryFeatures);\n }\n\n for (let i = 0, length = newFeatures.length; i < length; i++) {\n this.dispatchEvent(new VectorSourceEvent(VectorEventType.ADDFEATURE, newFeatures[i]));\n }\n};\n\n\n/**\n * @param {!module:ol/Collection.<module:ol/Feature>} collection Collection.\n * @private\n */\nVectorSource.prototype.bindFeaturesCollection_ = function(collection) {\n let modifyingCollection = false;\n listen(this, VectorEventType.ADDFEATURE,\n function(evt) {\n if (!modifyingCollection) {\n modifyingCollection = true;\n collection.push(evt.feature);\n modifyingCollection = false;\n }\n });\n listen(this, VectorEventType.REMOVEFEATURE,\n function(evt) {\n if (!modifyingCollection) {\n modifyingCollection = true;\n collection.remove(evt.feature);\n modifyingCollection = false;\n }\n });\n listen(collection, CollectionEventType.ADD,\n function(evt) {\n if (!modifyingCollection) {\n modifyingCollection = true;\n this.addFeature(/** @type {module:ol/Feature} */ (evt.element));\n modifyingCollection = false;\n }\n }, this);\n listen(collection, CollectionEventType.REMOVE,\n function(evt) {\n if (!modifyingCollection) {\n modifyingCollection = true;\n this.removeFeature(/** @type {module:ol/Feature} */ (evt.element));\n modifyingCollection = false;\n }\n }, this);\n this.featuresCollection_ = collection;\n};\n\n\n/**\n * Remove all features from the source.\n * @param {boolean=} opt_fast Skip dispatching of {@link module:ol/source/Vector~VectorSourceEvent#removefeature} events.\n * @api\n */\nVectorSource.prototype.clear = function(opt_fast) {\n if (opt_fast) {\n for (const featureId in this.featureChangeKeys_) {\n const keys = this.featureChangeKeys_[featureId];\n keys.forEach(unlistenByKey);\n }\n if (!this.featuresCollection_) {\n this.featureChangeKeys_ = {};\n this.idIndex_ = {};\n this.undefIdIndex_ = {};\n }\n } else {\n if (this.featuresRtree_) {\n this.featuresRtree_.forEach(this.removeFeatureInternal, this);\n for (const id in this.nullGeometryFeatures_) {\n this.removeFeatureInternal(this.nullGeometryFeatures_[id]);\n }\n }\n }\n if (this.featuresCollection_) {\n this.featuresCollection_.clear();\n }\n\n if (this.featuresRtree_) {\n this.featuresRtree_.clear();\n }\n this.loadedExtentsRtree_.clear();\n this.nullGeometryFeatures_ = {};\n\n const clearEvent = new VectorSourceEvent(VectorEventType.CLEAR);\n this.dispatchEvent(clearEvent);\n this.changed();\n};\n\n\n/**\n * Iterate through all features on the source, calling the provided callback\n * with each one. If the callback returns any \"truthy\" value, iteration will\n * stop and the function will return the same value.\n * Note: this function only iterate through the feature that have a defined geometry.\n *\n * @param {function(module:ol/Feature): T} callback Called with each feature\n * on the source. Return a truthy value to stop iteration.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n * @api\n */\nVectorSource.prototype.forEachFeature = function(callback) {\n if (this.featuresRtree_) {\n return this.featuresRtree_.forEach(callback);\n } else if (this.featuresCollection_) {\n return this.featuresCollection_.forEach(callback);\n }\n};\n\n\n/**\n * Iterate through all features whose geometries contain the provided\n * coordinate, calling the callback with each feature. If the callback returns\n * a \"truthy\" value, iteration will stop and the function will return the same\n * value.\n *\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {function(module:ol/Feature): T} callback Called with each feature\n * whose goemetry contains the provided coordinate.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n */\nVectorSource.prototype.forEachFeatureAtCoordinateDirect = function(coordinate, callback) {\n const extent = [coordinate[0], coordinate[1], coordinate[0], coordinate[1]];\n return this.forEachFeatureInExtent(extent, function(feature) {\n const geometry = feature.getGeometry();\n if (geometry.intersectsCoordinate(coordinate)) {\n return callback(feature);\n } else {\n return undefined;\n }\n });\n};\n\n\n/**\n * Iterate through all features whose bounding box intersects the provided\n * extent (note that the feature's geometry may not intersect the extent),\n * calling the callback with each feature. If the callback returns a \"truthy\"\n * value, iteration will stop and the function will return the same value.\n *\n * If you are interested in features whose geometry intersects an extent, call\n * the {@link module:ol/source/Vector~VectorSource#forEachFeatureIntersectingExtent #forEachFeatureIntersectingExtent()} method instead.\n *\n * When `useSpatialIndex` is set to false, this method will loop through all\n * features, equivalent to {@link module:ol/source/Vector~VectorSource#forEachFeature #forEachFeature()}.\n *\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {function(module:ol/Feature): T} callback Called with each feature\n * whose bounding box intersects the provided extent.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n * @api\n */\nVectorSource.prototype.forEachFeatureInExtent = function(extent, callback) {\n if (this.featuresRtree_) {\n return this.featuresRtree_.forEachInExtent(extent, callback);\n } else if (this.featuresCollection_) {\n return this.featuresCollection_.forEach(callback);\n }\n};\n\n\n/**\n * Iterate through all features whose geometry intersects the provided extent,\n * calling the callback with each feature. If the callback returns a \"truthy\"\n * value, iteration will stop and the function will return the same value.\n *\n * If you only want to test for bounding box intersection, call the\n * {@link module:ol/source/Vector~VectorSource#forEachFeatureInExtent #forEachFeatureInExtent()} method instead.\n *\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {function(module:ol/Feature): T} callback Called with each feature\n * whose geometry intersects the provided extent.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n * @api\n */\nVectorSource.prototype.forEachFeatureIntersectingExtent = function(extent, callback) {\n return this.forEachFeatureInExtent(extent,\n /**\n * @param {module:ol/Feature} feature Feature.\n * @return {T|undefined} The return value from the last call to the callback.\n * @template T\n */\n function(feature) {\n const geometry = feature.getGeometry();\n if (geometry.intersectsExtent(extent)) {\n const result = callback(feature);\n if (result) {\n return result;\n }\n }\n });\n};\n\n\n/**\n * Get the features collection associated with this source. Will be `null`\n * unless the source was configured with `useSpatialIndex` set to `false`, or\n * with an {@link module:ol/Collection} as `features`.\n * @return {module:ol/Collection.<module:ol/Feature>} The collection of features.\n * @api\n */\nVectorSource.prototype.getFeaturesCollection = function() {\n return this.featuresCollection_;\n};\n\n\n/**\n * Get all features on the source in random order.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nVectorSource.prototype.getFeatures = function() {\n let features;\n if (this.featuresCollection_) {\n features = this.featuresCollection_.getArray();\n } else if (this.featuresRtree_) {\n features = this.featuresRtree_.getAll();\n if (!isEmpty(this.nullGeometryFeatures_)) {\n extend(features, getValues(this.nullGeometryFeatures_));\n }\n }\n return (\n /** @type {Array.<module:ol/Feature>} */ (features)\n );\n};\n\n\n/**\n * Get all features whose geometry intersects the provided coordinate.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nVectorSource.prototype.getFeaturesAtCoordinate = function(coordinate) {\n const features = [];\n this.forEachFeatureAtCoordinateDirect(coordinate, function(feature) {\n features.push(feature);\n });\n return features;\n};\n\n\n/**\n * Get all features in the provided extent. Note that this returns an array of\n * all features intersecting the given extent in random order (so it may include\n * features whose geometries do not intersect the extent).\n *\n * This method is not available when the source is configured with\n * `useSpatialIndex` set to `false`.\n * @param {module:ol/extent~Extent} extent Extent.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nVectorSource.prototype.getFeaturesInExtent = function(extent) {\n return this.featuresRtree_.getInExtent(extent);\n};\n\n\n/**\n * Get the closest feature to the provided coordinate.\n *\n * This method is not available when the source is configured with\n * `useSpatialIndex` set to `false`.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {function(module:ol/Feature):boolean=} opt_filter Feature filter function.\n * The filter function will receive one argument, the {@link module:ol/Feature feature}\n * and it should return a boolean value. By default, no filtering is made.\n * @return {module:ol/Feature} Closest feature.\n * @api\n */\nVectorSource.prototype.getClosestFeatureToCoordinate = function(coordinate, opt_filter) {\n // Find the closest feature using branch and bound. We start searching an\n // infinite extent, and find the distance from the first feature found. This\n // becomes the closest feature. We then compute a smaller extent which any\n // closer feature must intersect. We continue searching with this smaller\n // extent, trying to find a closer feature. Every time we find a closer\n // feature, we update the extent being searched so that any even closer\n // feature must intersect it. We continue until we run out of features.\n const x = coordinate[0];\n const y = coordinate[1];\n let closestFeature = null;\n const closestPoint = [NaN, NaN];\n let minSquaredDistance = Infinity;\n const extent = [-Infinity, -Infinity, Infinity, Infinity];\n const filter = opt_filter ? opt_filter : TRUE;\n this.featuresRtree_.forEachInExtent(extent,\n /**\n * @param {module:ol/Feature} feature Feature.\n */\n function(feature) {\n if (filter(feature)) {\n const geometry = feature.getGeometry();\n const previousMinSquaredDistance = minSquaredDistance;\n minSquaredDistance = geometry.closestPointXY(\n x, y, closestPoint, minSquaredDistance);\n if (minSquaredDistance < previousMinSquaredDistance) {\n closestFeature = feature;\n // This is sneaky. Reduce the extent that it is currently being\n // searched while the R-Tree traversal using this same extent object\n // is still in progress. This is safe because the new extent is\n // strictly contained by the old extent.\n const minDistance = Math.sqrt(minSquaredDistance);\n extent[0] = x - minDistance;\n extent[1] = y - minDistance;\n extent[2] = x + minDistance;\n extent[3] = y + minDistance;\n }\n }\n });\n return closestFeature;\n};\n\n\n/**\n * Get the extent of the features currently in the source.\n *\n * This method is not available when the source is configured with\n * `useSpatialIndex` set to `false`.\n * @param {module:ol/extent~Extent=} opt_extent Destination extent. If provided, no new extent\n * will be created. Instead, that extent's coordinates will be overwritten.\n * @return {module:ol/extent~Extent} Extent.\n * @api\n */\nVectorSource.prototype.getExtent = function(opt_extent) {\n return this.featuresRtree_.getExtent(opt_extent);\n};\n\n\n/**\n * Get a feature by its identifier (the value returned by feature.getId()).\n * Note that the index treats string and numeric identifiers as the same. So\n * `source.getFeatureById(2)` will return a feature with id `'2'` or `2`.\n *\n * @param {string|number} id Feature identifier.\n * @return {module:ol/Feature} The feature (or `null` if not found).\n * @api\n */\nVectorSource.prototype.getFeatureById = function(id) {\n const feature = this.idIndex_[id.toString()];\n return feature !== undefined ? feature : null;\n};\n\n\n/**\n * Get the format associated with this source.\n *\n * @return {module:ol/format/Feature|undefined} The feature format.\n * @api\n */\nVectorSource.prototype.getFormat = function() {\n return this.format_;\n};\n\n\n/**\n * @return {boolean} The source can have overlapping geometries.\n */\nVectorSource.prototype.getOverlaps = function() {\n return this.overlaps_;\n};\n\n\n/**\n * @override\n */\nVectorSource.prototype.getResolutions = function() {};\n\n\n/**\n * Get the url associated with this source.\n *\n * @return {string|module:ol/featureloader~FeatureUrlFunction|undefined} The url.\n * @api\n */\nVectorSource.prototype.getUrl = function() {\n return this.url_;\n};\n\n\n/**\n * @param {module:ol/events/Event} event Event.\n * @private\n */\nVectorSource.prototype.handleFeatureChange_ = function(event) {\n const feature = /** @type {module:ol/Feature} */ (event.target);\n const featureKey = getUid(feature).toString();\n const geometry = feature.getGeometry();\n if (!geometry) {\n if (!(featureKey in this.nullGeometryFeatures_)) {\n if (this.featuresRtree_) {\n this.featuresRtree_.remove(feature);\n }\n this.nullGeometryFeatures_[featureKey] = feature;\n }\n } else {\n const extent = geometry.getExtent();\n if (featureKey in this.nullGeometryFeatures_) {\n delete this.nullGeometryFeatures_[featureKey];\n if (this.featuresRtree_) {\n this.featuresRtree_.insert(extent, feature);\n }\n } else {\n if (this.featuresRtree_) {\n this.featuresRtree_.update(extent, feature);\n }\n }\n }\n const id = feature.getId();\n if (id !== undefined) {\n const sid = id.toString();\n if (featureKey in this.undefIdIndex_) {\n delete this.undefIdIndex_[featureKey];\n this.idIndex_[sid] = feature;\n } else {\n if (this.idIndex_[sid] !== feature) {\n this.removeFromIdIndex_(feature);\n this.idIndex_[sid] = feature;\n }\n }\n } else {\n if (!(featureKey in this.undefIdIndex_)) {\n this.removeFromIdIndex_(feature);\n this.undefIdIndex_[featureKey] = feature;\n }\n }\n this.changed();\n this.dispatchEvent(new VectorSourceEvent(\n VectorEventType.CHANGEFEATURE, feature));\n};\n\n/**\n * Returns true if the feature is contained within the source.\n * @param {module:ol/Feature} feature Feature.\n * @return {boolean} Has feature.\n * @api\n */\nVectorSource.prototype.hasFeature = function(feature) {\n const id = feature.getId();\n if (id !== undefined) {\n return id in this.idIndex_;\n } else {\n const featureKey = getUid(feature).toString();\n return featureKey in this.undefIdIndex_;\n }\n};\n\n/**\n * @return {boolean} Is empty.\n */\nVectorSource.prototype.isEmpty = function() {\n return this.featuresRtree_.isEmpty() && isEmpty(this.nullGeometryFeatures_);\n};\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {module:ol/proj/Projection} projection Projection.\n */\nVectorSource.prototype.loadFeatures = function(extent, resolution, projection) {\n const loadedExtentsRtree = this.loadedExtentsRtree_;\n const extentsToLoad = this.strategy_(extent, resolution);\n for (let i = 0, ii = extentsToLoad.length; i < ii; ++i) {\n const extentToLoad = extentsToLoad[i];\n const alreadyLoaded = loadedExtentsRtree.forEachInExtent(extentToLoad,\n /**\n * @param {{extent: module:ol/extent~Extent}} object Object.\n * @return {boolean} Contains.\n */\n function(object) {\n return containsExtent(object.extent, extentToLoad);\n });\n if (!alreadyLoaded) {\n this.loader_.call(this, extentToLoad, resolution, projection);\n loadedExtentsRtree.insert(extentToLoad, {extent: extentToLoad.slice()});\n }\n }\n};\n\n\n/**\n * Remove an extent from the list of loaded extents.\n * @param {module:ol/extent~Extent} extent Extent.\n * @api\n */\nVectorSource.prototype.removeLoadedExtent = function(extent) {\n const loadedExtentsRtree = this.loadedExtentsRtree_;\n let obj;\n loadedExtentsRtree.forEachInExtent(extent, function(object) {\n if (equals(object.extent, extent)) {\n obj = object;\n return true;\n }\n });\n if (obj) {\n loadedExtentsRtree.remove(obj);\n }\n};\n\n\n/**\n * Remove a single feature from the source. If you want to remove all features\n * at once, use the {@link module:ol/source/Vector~VectorSource#clear #clear()} method\n * instead.\n * @param {module:ol/Feature} feature Feature to remove.\n * @api\n */\nVectorSource.prototype.removeFeature = function(feature) {\n const featureKey = getUid(feature).toString();\n if (featureKey in this.nullGeometryFeatures_) {\n delete this.nullGeometryFeatures_[featureKey];\n } else {\n if (this.featuresRtree_) {\n this.featuresRtree_.remove(feature);\n }\n }\n this.removeFeatureInternal(feature);\n this.changed();\n};\n\n\n/**\n * Remove feature without firing a `change` event.\n * @param {module:ol/Feature} feature Feature.\n * @protected\n */\nVectorSource.prototype.removeFeatureInternal = function(feature) {\n const featureKey = getUid(feature).toString();\n this.featureChangeKeys_[featureKey].forEach(unlistenByKey);\n delete this.featureChangeKeys_[featureKey];\n const id = feature.getId();\n if (id !== undefined) {\n delete this.idIndex_[id.toString()];\n } else {\n delete this.undefIdIndex_[featureKey];\n }\n this.dispatchEvent(new VectorSourceEvent(\n VectorEventType.REMOVEFEATURE, feature));\n};\n\n\n/**\n * Remove a feature from the id index. Called internally when the feature id\n * may have changed.\n * @param {module:ol/Feature} feature The feature.\n * @return {boolean} Removed the feature from the index.\n * @private\n */\nVectorSource.prototype.removeFromIdIndex_ = function(feature) {\n let removed = false;\n for (const id in this.idIndex_) {\n if (this.idIndex_[id] === feature) {\n delete this.idIndex_[id];\n removed = true;\n break;\n }\n }\n return removed;\n};\n\n\n/**\n * Set the new loader of the source. The next loadFeatures call will use the\n * new loader.\n * @param {module:ol/featureloader~FeatureLoader} loader The loader to set.\n * @api\n */\nVectorSource.prototype.setLoader = function(loader) {\n this.loader_ = loader;\n};\n\nexport default VectorSource;\n","/**\n * @module ol/interaction/Draw\n */\nimport {inherits} from '../util.js';\nimport EventType from '../events/EventType.js';\nimport Feature from '../Feature.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport MapBrowserPointerEvent from '../MapBrowserPointerEvent.js';\nimport {getChangeEventType} from '../Object.js';\nimport {squaredDistance as squaredCoordinateDistance} from '../coordinate.js';\nimport {listen} from '../events.js';\nimport Event from '../events/Event.js';\nimport {noModifierKeys, always, shiftKeyOnly} from '../events/condition.js';\nimport {boundingExtent, getBottomLeft, getBottomRight, getTopLeft, getTopRight} from '../extent.js';\nimport {TRUE, FALSE} from '../functions.js';\nimport Circle from '../geom/Circle.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport {POINTER_TYPE} from '../pointer/MouseSource.js';\nimport Point from '../geom/Point.js';\nimport Polygon, {fromCircle, makeRegular} from '../geom/Polygon.js';\nimport PointerInteraction, {handleEvent as handlePointerEvent} from '../interaction/Pointer.js';\nimport InteractionProperty from '../interaction/Property.js';\nimport VectorLayer from '../layer/Vector.js';\nimport VectorSource from '../source/Vector.js';\nimport {createEditingStyle} from '../style/Style.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/geom/GeometryType} type Geometry type of\n * the geometries being drawn with this instance.\n * @property {number} [clickTolerance=6] The maximum distance in pixels between\n * \"down\" and \"up\" for a \"up\" event to be considered a \"click\" event and\n * actually add a point/vertex to the geometry being drawn. The default of `6`\n * was chosen for the draw interaction to behave correctly on mouse as well as\n * on touch devices.\n * @property {module:ol/Collection.<module:ol/Feature>} [features]\n * Destination collection for the drawn features.\n * @property {module:ol/source/Vector} [source] Destination source for\n * the drawn features.\n * @property {number} [dragVertexDelay=500] Delay in milliseconds after pointerdown\n * before the current vertex can be dragged to its exact position.\n * @property {number} [snapTolerance=12] Pixel distance for snapping to the\n * drawing finish.\n * @property {boolean} [stopClick=false] Stop click, singleclick, and\n * doubleclick events from firing during drawing.\n * @property {number} [maxPoints] The number of points that can be drawn before\n * a polygon ring or line string is finished. By default there is no\n * restriction.\n * @property {number} [minPoints] The number of points that must be drawn\n * before a polygon ring or line string can be finished. Default is `3` for\n * polygon rings and `2` for line strings.\n * @property {module:ol/events/condition~Condition} [finishCondition] A function\n * that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether the drawing can be finished.\n * @property {module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction} [style]\n * Style for sketch features.\n * @property {module:ol/interaction/Draw~GeometryFunction} [geometryFunction]\n * Function that is called when a geometry's coordinates are updated.\n * @property {string} [geometryName] Geometry name to use for features created\n * by the draw interaction.\n * @property {module:ol/events/condition~Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * By default {@link module:ol/events/condition~noModifierKeys}, i.e. a click,\n * adds a vertex or deactivates freehand drawing.\n * @property {boolean} [freehand=false] Operate in freehand mode for lines,\n * polygons, and circles. This makes the interaction always operate in freehand\n * mode and takes precedence over any `freehandCondition` option.\n * @property {module:ol/events/condition~Condition} [freehandCondition]\n * Condition that activates freehand drawing for lines and polygons. This\n * function takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and\n * returns a boolean to indicate whether that event should be handled. The\n * default is {@link module:ol/events/condition~shiftKeyOnly}, meaning that the\n * Shift key activates freehand drawing.\n * @property {boolean} [wrapX=false] Wrap the world horizontally on the sketch\n * overlay.\n */\n\n\n/**\n * Function that takes an array of coordinates and an optional existing geometry as\n * arguments, and returns a geometry. The optional existing geometry is the\n * geometry that is returned when the function is called without a second\n * argument.\n * @typedef {function(!Array.<module:ol/coordinate~Coordinate>, module:ol/geom/SimpleGeometry=):\n * module:ol/geom/SimpleGeometry} GeometryFunction\n */\n\n\n/**\n * Draw mode. This collapses multi-part geometry types with their single-part\n * cousins.\n * @enum {string}\n */\nconst Mode = {\n POINT: 'Point',\n LINE_STRING: 'LineString',\n POLYGON: 'Polygon',\n CIRCLE: 'Circle'\n};\n\n\n/**\n * @enum {string}\n */\nconst DrawEventType = {\n /**\n * Triggered upon feature draw start\n * @event module:ol/interaction/Draw~DrawEvent#drawstart\n * @api\n */\n DRAWSTART: 'drawstart',\n /**\n * Triggered upon feature draw end\n * @event module:ol/interaction/Draw~DrawEvent#drawend\n * @api\n */\n DRAWEND: 'drawend'\n};\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/Draw~Draw} instances are\n * instances of this type.\n *\n * @constructor\n * @extends {module:ol/events/Event}\n * @param {module:ol/interaction/Draw~DrawEventType} type Type.\n * @param {module:ol/Feature} feature The feature drawn.\n */\nconst DrawEvent = function(type, feature) {\n\n Event.call(this, type);\n\n /**\n * The feature being drawn.\n * @type {module:ol/Feature}\n * @api\n */\n this.feature = feature;\n\n};\n\ninherits(DrawEvent, Event);\n\n\n/**\n * @classdesc\n * Interaction for drawing feature geometries.\n *\n * @constructor\n * @extends {module:ol/interaction/Pointer}\n * @fires module:ol/interaction/Draw~DrawEvent\n * @param {module:ol/interaction/Draw~Options} options Options.\n * @api\n */\nconst Draw = function(options) {\n\n PointerInteraction.call(this, {\n handleDownEvent: handleDownEvent,\n handleEvent: handleEvent,\n handleUpEvent: handleUpEvent\n });\n\n /**\n * @type {boolean}\n * @private\n */\n this.shouldHandle_ = false;\n\n /**\n * @type {module:ol~Pixel}\n * @private\n */\n this.downPx_ = null;\n\n /**\n * @type {number|undefined}\n * @private\n */\n this.downTimeout_;\n\n /**\n * @type {number|undefined}\n * @private\n */\n this.lastDragTime_;\n\n /**\n * @type {boolean}\n * @private\n */\n this.freehand_ = false;\n\n /**\n * Target source for drawn features.\n * @type {module:ol/source/Vector}\n * @private\n */\n this.source_ = options.source ? options.source : null;\n\n /**\n * Target collection for drawn features.\n * @type {module:ol/Collection.<module:ol/Feature>}\n * @private\n */\n this.features_ = options.features ? options.features : null;\n\n /**\n * Pixel distance for snapping.\n * @type {number}\n * @private\n */\n this.snapTolerance_ = options.snapTolerance ? options.snapTolerance : 12;\n\n /**\n * Geometry type.\n * @type {module:ol/geom/GeometryType}\n * @private\n */\n this.type_ = /** @type {module:ol/geom/GeometryType} */ (options.type);\n\n /**\n * Drawing mode (derived from geometry type.\n * @type {module:ol/interaction/Draw~Mode}\n * @private\n */\n this.mode_ = getMode(this.type_);\n\n /**\n * Stop click, singleclick, and doubleclick events from firing during drawing.\n * Default is `false`.\n * @type {boolean}\n * @private\n */\n this.stopClick_ = !!options.stopClick;\n\n /**\n * The number of points that must be drawn before a polygon ring or line\n * string can be finished. The default is 3 for polygon rings and 2 for\n * line strings.\n * @type {number}\n * @private\n */\n this.minPoints_ = options.minPoints ?\n options.minPoints :\n (this.mode_ === Mode.POLYGON ? 3 : 2);\n\n /**\n * The number of points that can be drawn before a polygon ring or line string\n * is finished. The default is no restriction.\n * @type {number}\n * @private\n */\n this.maxPoints_ = options.maxPoints ? options.maxPoints : Infinity;\n\n /**\n * A function to decide if a potential finish coordinate is permissible\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.finishCondition_ = options.finishCondition ? options.finishCondition : TRUE;\n\n let geometryFunction = options.geometryFunction;\n if (!geometryFunction) {\n if (this.type_ === GeometryType.CIRCLE) {\n /**\n * @param {!Array.<module:ol/coordinate~Coordinate>} coordinates\n * The coordinates.\n * @param {module:ol/geom/SimpleGeometry=} opt_geometry Optional geometry.\n * @return {module:ol/geom/SimpleGeometry} A geometry.\n */\n geometryFunction = function(coordinates, opt_geometry) {\n const circle = opt_geometry ? /** @type {module:ol/geom/Circle} */ (opt_geometry) :\n new Circle([NaN, NaN]);\n const squaredLength = squaredCoordinateDistance(\n coordinates[0], coordinates[1]);\n circle.setCenterAndRadius(coordinates[0], Math.sqrt(squaredLength));\n return circle;\n };\n } else {\n let Constructor;\n const mode = this.mode_;\n if (mode === Mode.POINT) {\n Constructor = Point;\n } else if (mode === Mode.LINE_STRING) {\n Constructor = LineString;\n } else if (mode === Mode.POLYGON) {\n Constructor = Polygon;\n }\n /**\n * @param {!Array.<module:ol/coordinate~Coordinate>} coordinates\n * The coordinates.\n * @param {module:ol/geom/SimpleGeometry=} opt_geometry Optional geometry.\n * @return {module:ol/geom/SimpleGeometry} A geometry.\n */\n geometryFunction = function(coordinates, opt_geometry) {\n let geometry = opt_geometry;\n if (geometry) {\n if (mode === Mode.POLYGON) {\n if (coordinates[0].length) {\n // Add a closing coordinate to match the first\n geometry.setCoordinates([coordinates[0].concat([coordinates[0][0]])]);\n } else {\n geometry.setCoordinates([]);\n }\n } else {\n geometry.setCoordinates(coordinates);\n }\n } else {\n geometry = new Constructor(coordinates);\n }\n return geometry;\n };\n }\n }\n\n /**\n * @type {module:ol/interaction/Draw~GeometryFunction}\n * @private\n */\n this.geometryFunction_ = geometryFunction;\n\n /**\n * @type {number}\n * @private\n */\n this.dragVertexDelay_ = options.dragVertexDelay !== undefined ? options.dragVertexDelay : 500;\n\n /**\n * Finish coordinate for the feature (first point for polygons, last point for\n * linestrings).\n * @type {module:ol/coordinate~Coordinate}\n * @private\n */\n this.finishCoordinate_ = null;\n\n /**\n * Sketch feature.\n * @type {module:ol/Feature}\n * @private\n */\n this.sketchFeature_ = null;\n\n /**\n * Sketch point.\n * @type {module:ol/Feature}\n * @private\n */\n this.sketchPoint_ = null;\n\n /**\n * Sketch coordinates. Used when drawing a line or polygon.\n * @type {module:ol/coordinate~Coordinate|Array.<module:ol/coordinate~Coordinate>|Array.<Array.<module:ol/coordinate~Coordinate>>}\n * @private\n */\n this.sketchCoords_ = null;\n\n /**\n * Sketch line. Used when drawing polygon.\n * @type {module:ol/Feature}\n * @private\n */\n this.sketchLine_ = null;\n\n /**\n * Sketch line coordinates. Used when drawing a polygon or circle.\n * @type {Array.<module:ol/coordinate~Coordinate>}\n * @private\n */\n this.sketchLineCoords_ = null;\n\n /**\n * Squared tolerance for handling up events. If the squared distance\n * between a down and up event is greater than this tolerance, up events\n * will not be handled.\n * @type {number}\n * @private\n */\n this.squaredClickTolerance_ = options.clickTolerance ?\n options.clickTolerance * options.clickTolerance : 36;\n\n /**\n * Draw overlay where our sketch features are drawn.\n * @type {module:ol/layer/Vector}\n * @private\n */\n this.overlay_ = new VectorLayer({\n source: new VectorSource({\n useSpatialIndex: false,\n wrapX: options.wrapX ? options.wrapX : false\n }),\n style: options.style ? options.style :\n getDefaultStyleFunction(),\n updateWhileInteracting: true\n });\n\n /**\n * Name of the geometry attribute for newly created features.\n * @type {string|undefined}\n * @private\n */\n this.geometryName_ = options.geometryName;\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.condition_ = options.condition ? options.condition : noModifierKeys;\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.freehandCondition_;\n if (options.freehand) {\n this.freehandCondition_ = always;\n } else {\n this.freehandCondition_ = options.freehandCondition ?\n options.freehandCondition : shiftKeyOnly;\n }\n\n listen(this,\n getChangeEventType(InteractionProperty.ACTIVE),\n this.updateState_, this);\n\n};\n\ninherits(Draw, PointerInteraction);\n\n\n/**\n * @return {module:ol/style/Style~StyleFunction} Styles.\n */\nfunction getDefaultStyleFunction() {\n const styles = createEditingStyle();\n return function(feature, resolution) {\n return styles[feature.getGeometry().getType()];\n };\n}\n\n\n/**\n * @inheritDoc\n */\nDraw.prototype.setMap = function(map) {\n PointerInteraction.prototype.setMap.call(this, map);\n this.updateState_();\n};\n\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} and may actually\n * draw or finish the drawing.\n * @param {module:ol/MapBrowserEvent} event Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @this {module:ol/interaction/Draw}\n * @api\n */\nexport function handleEvent(event) {\n if (event.originalEvent.type === EventType.CONTEXTMENU) {\n // Avoid context menu for long taps when drawing on mobile\n event.preventDefault();\n }\n this.freehand_ = this.mode_ !== Mode.POINT && this.freehandCondition_(event);\n let move = event.type === MapBrowserEventType.POINTERMOVE;\n let pass = true;\n if (this.lastDragTime_ && event.type === MapBrowserEventType.POINTERDRAG) {\n const now = Date.now();\n if (now - this.lastDragTime_ >= this.dragVertexDelay_) {\n this.downPx_ = event.pixel;\n this.shouldHandle_ = !this.freehand_;\n move = true;\n } else {\n this.lastDragTime_ = undefined;\n }\n if (this.shouldHandle_ && this.downTimeout_) {\n clearTimeout(this.downTimeout_);\n this.downTimeout_ = undefined;\n }\n }\n if (this.freehand_ &&\n event.type === MapBrowserEventType.POINTERDRAG &&\n this.sketchFeature_ !== null) {\n this.addToDrawing_(event);\n pass = false;\n } else if (this.freehand_ &&\n event.type === MapBrowserEventType.POINTERDOWN) {\n pass = false;\n } else if (move) {\n pass = event.type === MapBrowserEventType.POINTERMOVE;\n if (pass && this.freehand_) {\n pass = this.handlePointerMove_(event);\n } else if (event.pointerEvent.pointerType == POINTER_TYPE ||\n (event.type === MapBrowserEventType.POINTERDRAG && !this.downTimeout_)) {\n this.handlePointerMove_(event);\n }\n } else if (event.type === MapBrowserEventType.DBLCLICK) {\n pass = false;\n }\n\n return handlePointerEvent.call(this, event) && pass;\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} event Event.\n * @return {boolean} Start drag sequence?\n * @this {module:ol/interaction/Draw}\n */\nfunction handleDownEvent(event) {\n this.shouldHandle_ = !this.freehand_;\n\n if (this.freehand_) {\n this.downPx_ = event.pixel;\n if (!this.finishCoordinate_) {\n this.startDrawing_(event);\n }\n return true;\n } else if (this.condition_(event)) {\n this.lastDragTime_ = Date.now();\n this.downTimeout_ = setTimeout(function() {\n this.handlePointerMove_(new MapBrowserPointerEvent(\n MapBrowserEventType.POINTERMOVE, event.map, event.pointerEvent, event.frameState));\n }.bind(this), this.dragVertexDelay_);\n this.downPx_ = event.pixel;\n return true;\n } else {\n return false;\n }\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} event Event.\n * @return {boolean} Stop drag sequence?\n * @this {module:ol/interaction/Draw}\n */\nfunction handleUpEvent(event) {\n let pass = true;\n\n if (this.downTimeout_) {\n clearTimeout(this.downTimeout_);\n this.downTimeout_ = undefined;\n }\n\n this.handlePointerMove_(event);\n\n const circleMode = this.mode_ === Mode.CIRCLE;\n\n if (this.shouldHandle_) {\n if (!this.finishCoordinate_) {\n this.startDrawing_(event);\n if (this.mode_ === Mode.POINT) {\n this.finishDrawing();\n }\n } else if (this.freehand_ || circleMode) {\n this.finishDrawing();\n } else if (this.atFinish_(event)) {\n if (this.finishCondition_(event)) {\n this.finishDrawing();\n }\n } else {\n this.addToDrawing_(event);\n }\n pass = false;\n } else if (this.freehand_) {\n this.finishCoordinate_ = null;\n this.abortDrawing_();\n }\n if (!pass && this.stopClick_) {\n event.stopPropagation();\n }\n return pass;\n}\n\n\n/**\n * Handle move events.\n * @param {module:ol/MapBrowserEvent} event A move event.\n * @return {boolean} Pass the event to other interactions.\n * @private\n */\nDraw.prototype.handlePointerMove_ = function(event) {\n if (this.downPx_ &&\n ((!this.freehand_ && this.shouldHandle_) ||\n (this.freehand_ && !this.shouldHandle_))) {\n const downPx = this.downPx_;\n const clickPx = event.pixel;\n const dx = downPx[0] - clickPx[0];\n const dy = downPx[1] - clickPx[1];\n const squaredDistance = dx * dx + dy * dy;\n this.shouldHandle_ = this.freehand_ ?\n squaredDistance > this.squaredClickTolerance_ :\n squaredDistance <= this.squaredClickTolerance_;\n if (!this.shouldHandle_) {\n return true;\n }\n }\n\n if (this.finishCoordinate_) {\n this.modifyDrawing_(event);\n } else {\n this.createOrUpdateSketchPoint_(event);\n }\n return true;\n};\n\n\n/**\n * Determine if an event is within the snapping tolerance of the start coord.\n * @param {module:ol/MapBrowserEvent} event Event.\n * @return {boolean} The event is within the snapping tolerance of the start.\n * @private\n */\nDraw.prototype.atFinish_ = function(event) {\n let at = false;\n if (this.sketchFeature_) {\n let potentiallyDone = false;\n let potentiallyFinishCoordinates = [this.finishCoordinate_];\n if (this.mode_ === Mode.LINE_STRING) {\n potentiallyDone = this.sketchCoords_.length > this.minPoints_;\n } else if (this.mode_ === Mode.POLYGON) {\n potentiallyDone = this.sketchCoords_[0].length >\n this.minPoints_;\n potentiallyFinishCoordinates = [this.sketchCoords_[0][0],\n this.sketchCoords_[0][this.sketchCoords_[0].length - 2]];\n }\n if (potentiallyDone) {\n const map = event.map;\n for (let i = 0, ii = potentiallyFinishCoordinates.length; i < ii; i++) {\n const finishCoordinate = potentiallyFinishCoordinates[i];\n const finishPixel = map.getPixelFromCoordinate(finishCoordinate);\n const pixel = event.pixel;\n const dx = pixel[0] - finishPixel[0];\n const dy = pixel[1] - finishPixel[1];\n const snapTolerance = this.freehand_ ? 1 : this.snapTolerance_;\n at = Math.sqrt(dx * dx + dy * dy) <= snapTolerance;\n if (at) {\n this.finishCoordinate_ = finishCoordinate;\n break;\n }\n }\n }\n }\n return at;\n};\n\n\n/**\n * @param {module:ol/MapBrowserEvent} event Event.\n * @private\n */\nDraw.prototype.createOrUpdateSketchPoint_ = function(event) {\n const coordinates = event.coordinate.slice();\n if (!this.sketchPoint_) {\n this.sketchPoint_ = new Feature(new Point(coordinates));\n this.updateSketchFeatures_();\n } else {\n const sketchPointGeom = /** @type {module:ol/geom/Point} */ (this.sketchPoint_.getGeometry());\n sketchPointGeom.setCoordinates(coordinates);\n }\n};\n\n\n/**\n * Start the drawing.\n * @param {module:ol/MapBrowserEvent} event Event.\n * @private\n */\nDraw.prototype.startDrawing_ = function(event) {\n const start = event.coordinate;\n this.finishCoordinate_ = start;\n if (this.mode_ === Mode.POINT) {\n this.sketchCoords_ = start.slice();\n } else if (this.mode_ === Mode.POLYGON) {\n this.sketchCoords_ = [[start.slice(), start.slice()]];\n this.sketchLineCoords_ = this.sketchCoords_[0];\n } else {\n this.sketchCoords_ = [start.slice(), start.slice()];\n }\n if (this.sketchLineCoords_) {\n this.sketchLine_ = new Feature(\n new LineString(this.sketchLineCoords_));\n }\n const geometry = this.geometryFunction_(this.sketchCoords_);\n this.sketchFeature_ = new Feature();\n if (this.geometryName_) {\n this.sketchFeature_.setGeometryName(this.geometryName_);\n }\n this.sketchFeature_.setGeometry(geometry);\n this.updateSketchFeatures_();\n this.dispatchEvent(new DrawEvent(DrawEventType.DRAWSTART, this.sketchFeature_));\n};\n\n\n/**\n * Modify the drawing.\n * @param {module:ol/MapBrowserEvent} event Event.\n * @private\n */\nDraw.prototype.modifyDrawing_ = function(event) {\n let coordinate = event.coordinate;\n const geometry = /** @type {module:ol/geom/SimpleGeometry} */ (this.sketchFeature_.getGeometry());\n let coordinates, last;\n if (this.mode_ === Mode.POINT) {\n last = this.sketchCoords_;\n } else if (this.mode_ === Mode.POLYGON) {\n coordinates = this.sketchCoords_[0];\n last = coordinates[coordinates.length - 1];\n if (this.atFinish_(event)) {\n // snap to finish\n coordinate = this.finishCoordinate_.slice();\n }\n } else {\n coordinates = this.sketchCoords_;\n last = coordinates[coordinates.length - 1];\n }\n last[0] = coordinate[0];\n last[1] = coordinate[1];\n this.geometryFunction_(/** @type {!Array.<module:ol/coordinate~Coordinate>} */ (this.sketchCoords_), geometry);\n if (this.sketchPoint_) {\n const sketchPointGeom = /** @type {module:ol/geom/Point} */ (this.sketchPoint_.getGeometry());\n sketchPointGeom.setCoordinates(coordinate);\n }\n let sketchLineGeom;\n if (geometry instanceof Polygon &&\n this.mode_ !== Mode.POLYGON) {\n if (!this.sketchLine_) {\n this.sketchLine_ = new Feature(new LineString(null));\n }\n const ring = geometry.getLinearRing(0);\n sketchLineGeom = /** @type {module:ol/geom/LineString} */ (this.sketchLine_.getGeometry());\n sketchLineGeom.setFlatCoordinates(\n ring.getLayout(), ring.getFlatCoordinates());\n } else if (this.sketchLineCoords_) {\n sketchLineGeom = /** @type {module:ol/geom/LineString} */ (this.sketchLine_.getGeometry());\n sketchLineGeom.setCoordinates(this.sketchLineCoords_);\n }\n this.updateSketchFeatures_();\n};\n\n\n/**\n * Add a new coordinate to the drawing.\n * @param {module:ol/MapBrowserEvent} event Event.\n * @private\n */\nDraw.prototype.addToDrawing_ = function(event) {\n const coordinate = event.coordinate;\n const geometry = /** @type {module:ol/geom/SimpleGeometry} */ (this.sketchFeature_.getGeometry());\n let done;\n let coordinates;\n if (this.mode_ === Mode.LINE_STRING) {\n this.finishCoordinate_ = coordinate.slice();\n coordinates = this.sketchCoords_;\n if (coordinates.length >= this.maxPoints_) {\n if (this.freehand_) {\n coordinates.pop();\n } else {\n done = true;\n }\n }\n coordinates.push(coordinate.slice());\n this.geometryFunction_(coordinates, geometry);\n } else if (this.mode_ === Mode.POLYGON) {\n coordinates = this.sketchCoords_[0];\n if (coordinates.length >= this.maxPoints_) {\n if (this.freehand_) {\n coordinates.pop();\n } else {\n done = true;\n }\n }\n coordinates.push(coordinate.slice());\n if (done) {\n this.finishCoordinate_ = coordinates[0];\n }\n this.geometryFunction_(this.sketchCoords_, geometry);\n }\n this.updateSketchFeatures_();\n if (done) {\n this.finishDrawing();\n }\n};\n\n\n/**\n * Remove last point of the feature currently being drawn.\n * @api\n */\nDraw.prototype.removeLastPoint = function() {\n if (!this.sketchFeature_) {\n return;\n }\n const geometry = /** @type {module:ol/geom/SimpleGeometry} */ (this.sketchFeature_.getGeometry());\n let coordinates, sketchLineGeom;\n if (this.mode_ === Mode.LINE_STRING) {\n coordinates = this.sketchCoords_;\n coordinates.splice(-2, 1);\n this.geometryFunction_(coordinates, geometry);\n if (coordinates.length >= 2) {\n this.finishCoordinate_ = coordinates[coordinates.length - 2].slice();\n }\n } else if (this.mode_ === Mode.POLYGON) {\n coordinates = this.sketchCoords_[0];\n coordinates.splice(-2, 1);\n sketchLineGeom = /** @type {module:ol/geom/LineString} */ (this.sketchLine_.getGeometry());\n sketchLineGeom.setCoordinates(coordinates);\n this.geometryFunction_(this.sketchCoords_, geometry);\n }\n\n if (coordinates.length === 0) {\n this.finishCoordinate_ = null;\n }\n\n this.updateSketchFeatures_();\n};\n\n\n/**\n * Stop drawing and add the sketch feature to the target layer.\n * The {@link module:ol/interaction/Draw~DrawEventType.DRAWEND} event is\n * dispatched before inserting the feature.\n * @api\n */\nDraw.prototype.finishDrawing = function() {\n const sketchFeature = this.abortDrawing_();\n if (!sketchFeature) {\n return;\n }\n let coordinates = this.sketchCoords_;\n const geometry = /** @type {module:ol/geom/SimpleGeometry} */ (sketchFeature.getGeometry());\n if (this.mode_ === Mode.LINE_STRING) {\n // remove the redundant last point\n coordinates.pop();\n this.geometryFunction_(coordinates, geometry);\n } else if (this.mode_ === Mode.POLYGON) {\n // remove the redundant last point in ring\n coordinates[0].pop();\n this.geometryFunction_(coordinates, geometry);\n coordinates = geometry.getCoordinates();\n }\n\n // cast multi-part geometries\n if (this.type_ === GeometryType.MULTI_POINT) {\n sketchFeature.setGeometry(new MultiPoint([coordinates]));\n } else if (this.type_ === GeometryType.MULTI_LINE_STRING) {\n sketchFeature.setGeometry(new MultiLineString([coordinates]));\n } else if (this.type_ === GeometryType.MULTI_POLYGON) {\n sketchFeature.setGeometry(new MultiPolygon([coordinates]));\n }\n\n // First dispatch event to allow full set up of feature\n this.dispatchEvent(new DrawEvent(DrawEventType.DRAWEND, sketchFeature));\n\n // Then insert feature\n if (this.features_) {\n this.features_.push(sketchFeature);\n }\n if (this.source_) {\n this.source_.addFeature(sketchFeature);\n }\n};\n\n\n/**\n * Stop drawing without adding the sketch feature to the target layer.\n * @return {module:ol/Feature} The sketch feature (or null if none).\n * @private\n */\nDraw.prototype.abortDrawing_ = function() {\n this.finishCoordinate_ = null;\n const sketchFeature = this.sketchFeature_;\n if (sketchFeature) {\n this.sketchFeature_ = null;\n this.sketchPoint_ = null;\n this.sketchLine_ = null;\n this.overlay_.getSource().clear(true);\n }\n return sketchFeature;\n};\n\n\n/**\n * Extend an existing geometry by adding additional points. This only works\n * on features with `LineString` geometries, where the interaction will\n * extend lines by adding points to the end of the coordinates array.\n * @param {!module:ol/Feature} feature Feature to be extended.\n * @api\n */\nDraw.prototype.extend = function(feature) {\n const geometry = feature.getGeometry();\n const lineString = /** @type {module:ol/geom/LineString} */ (geometry);\n this.sketchFeature_ = feature;\n this.sketchCoords_ = lineString.getCoordinates();\n const last = this.sketchCoords_[this.sketchCoords_.length - 1];\n this.finishCoordinate_ = last.slice();\n this.sketchCoords_.push(last.slice());\n this.updateSketchFeatures_();\n this.dispatchEvent(new DrawEvent(DrawEventType.DRAWSTART, this.sketchFeature_));\n};\n\n\n/**\n * @inheritDoc\n */\nDraw.prototype.shouldStopEvent = FALSE;\n\n\n/**\n * Redraw the sketch features.\n * @private\n */\nDraw.prototype.updateSketchFeatures_ = function() {\n const sketchFeatures = [];\n if (this.sketchFeature_) {\n sketchFeatures.push(this.sketchFeature_);\n }\n if (this.sketchLine_) {\n sketchFeatures.push(this.sketchLine_);\n }\n if (this.sketchPoint_) {\n sketchFeatures.push(this.sketchPoint_);\n }\n const overlaySource = this.overlay_.getSource();\n overlaySource.clear(true);\n overlaySource.addFeatures(sketchFeatures);\n};\n\n\n/**\n * @private\n */\nDraw.prototype.updateState_ = function() {\n const map = this.getMap();\n const active = this.getActive();\n if (!map || !active) {\n this.abortDrawing_();\n }\n this.overlay_.setMap(active ? map : null);\n};\n\n\n/**\n * Create a `geometryFunction` for `type: 'Circle'` that will create a regular\n * polygon with a user specified number of sides and start angle instead of an\n * `module:ol/geom/Circle~Circle` geometry.\n * @param {number=} opt_sides Number of sides of the regular polygon. Default is\n * 32.\n * @param {number=} opt_angle Angle of the first point in radians. 0 means East.\n * Default is the angle defined by the heading from the center of the\n * regular polygon to the current pointer position.\n * @return {module:ol/interaction/Draw~GeometryFunction} Function that draws a\n * polygon.\n * @api\n */\nexport function createRegularPolygon(opt_sides, opt_angle) {\n return function(coordinates, opt_geometry) {\n const center = coordinates[0];\n const end = coordinates[1];\n const radius = Math.sqrt(\n squaredCoordinateDistance(center, end));\n const geometry = opt_geometry ? /** @type {module:ol/geom/Polygon} */ (opt_geometry) :\n fromCircle(new Circle(center), opt_sides);\n const angle = opt_angle ? opt_angle :\n Math.atan((end[1] - center[1]) / (end[0] - center[0]));\n makeRegular(geometry, center, radius, angle);\n return geometry;\n };\n}\n\n\n/**\n * Create a `geometryFunction` that will create a box-shaped polygon (aligned\n * with the coordinate system axes). Use this with the draw interaction and\n * `type: 'Circle'` to return a box instead of a circle geometry.\n * @return {module:ol/interaction/Draw~GeometryFunction} Function that draws a box-shaped polygon.\n * @api\n */\nexport function createBox() {\n return (\n function(coordinates, opt_geometry) {\n const extent = boundingExtent(coordinates);\n const geometry = opt_geometry || new Polygon(null);\n geometry.setCoordinates([[\n getBottomLeft(extent),\n getBottomRight(extent),\n getTopRight(extent),\n getTopLeft(extent),\n getBottomLeft(extent)\n ]]);\n return geometry;\n }\n );\n}\n\n\n/**\n * Get the drawing mode. The mode for mult-part geometries is the same as for\n * their single-part cousins.\n * @param {module:ol/geom/GeometryType} type Geometry type.\n * @return {module:ol/interaction/Draw~Mode} Drawing mode.\n */\nfunction getMode(type) {\n let mode;\n if (type === GeometryType.POINT ||\n type === GeometryType.MULTI_POINT) {\n mode = Mode.POINT;\n } else if (type === GeometryType.LINE_STRING ||\n type === GeometryType.MULTI_LINE_STRING) {\n mode = Mode.LINE_STRING;\n } else if (type === GeometryType.POLYGON ||\n type === GeometryType.MULTI_POLYGON) {\n mode = Mode.POLYGON;\n } else if (type === GeometryType.CIRCLE) {\n mode = Mode.CIRCLE;\n }\n return (\n /** @type {!module:ol/interaction/Draw~Mode} */ (mode)\n );\n}\n\n\nexport default Draw;\n","/**\n * @module ol/interaction/Extent\n */\nimport {inherits} from '../util.js';\nimport Feature from '../Feature.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport MapBrowserPointerEvent from '../MapBrowserPointerEvent.js';\nimport {squaredDistanceToSegment, closestOnSegment, distance as coordinateDistance, squaredDistance as squaredCoordinateDistance} from '../coordinate.js';\nimport Event from '../events/Event.js';\nimport {boundingExtent, getArea} from '../extent.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport Point from '../geom/Point.js';\nimport {fromExtent as polygonFromExtent} from '../geom/Polygon.js';\nimport PointerInteraction, {handleEvent as handlePointerEvent} from '../interaction/Pointer.js';\nimport VectorLayer from '../layer/Vector.js';\nimport VectorSource from '../source/Vector.js';\nimport {createEditingStyle} from '../style/Style.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/extent~Extent} [extent] Initial extent. Defaults to no\n * initial extent.\n * @property {module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction} [boxStyle]\n * Style for the drawn extent box. Defaults to\n * {@link module:ol/style/Style~createEditing()['Polygon']}\n * @property {number} [pixelTolerance=10] Pixel tolerance for considering the\n * pointer close enough to a segment or vertex for editing.\n * @property {module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction} [pointerStyle]\n * Style for the cursor used to draw the extent. Defaults to\n * {@link module:ol/style/Style~createEditing()['Point']}\n * @property {boolean} [wrapX=false] Wrap the drawn extent across multiple maps\n * in the X direction? Only affects visuals, not functionality.\n */\n\n\n/**\n * @enum {string}\n */\nconst ExtentEventType = {\n /**\n * Triggered after the extent is changed\n * @event module:ol/interaction/Extent~ExtentEventType#extentchanged\n * @api\n */\n EXTENTCHANGED: 'extentchanged'\n};\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/Extent~Extent} instances are\n * instances of this type.\n *\n * @constructor\n * @param {module:ol/extent~Extent} extent the new extent\n * @extends {module:ol/events/Event}\n */\nconst ExtentInteractionEvent = function(extent) {\n Event.call(this, ExtentEventType.EXTENTCHANGED);\n\n /**\n * The current extent.\n * @type {module:ol/extent~Extent}\n * @api\n */\n this.extent = extent;\n\n};\ninherits(ExtentInteractionEvent, Event);\n\n\n/**\n * @classdesc\n * Allows the user to draw a vector box by clicking and dragging on the map.\n * Once drawn, the vector box can be modified by dragging its vertices or edges.\n * This interaction is only supported for mouse devices.\n *\n * @constructor\n * @extends {module:ol/interaction/Pointer}\n * @fires module:ol/interaction/Extent~Event\n * @param {module:ol/interaction/Extent~Options=} opt_options Options.\n * @api\n */\nconst ExtentInteraction = function(opt_options) {\n\n const options = opt_options || {};\n\n /**\n * Extent of the drawn box\n * @type {module:ol/extent~Extent}\n * @private\n */\n this.extent_ = null;\n\n /**\n * Handler for pointer move events\n * @type {function (module:ol/coordinate~Coordinate): module:ol/extent~Extent|null}\n * @private\n */\n this.pointerHandler_ = null;\n\n /**\n * Pixel threshold to snap to extent\n * @type {number}\n * @private\n */\n this.pixelTolerance_ = options.pixelTolerance !== undefined ?\n options.pixelTolerance : 10;\n\n /**\n * Is the pointer snapped to an extent vertex\n * @type {boolean}\n * @private\n */\n this.snappedToVertex_ = false;\n\n /**\n * Feature for displaying the visible extent\n * @type {module:ol/Feature}\n * @private\n */\n this.extentFeature_ = null;\n\n /**\n * Feature for displaying the visible pointer\n * @type {module:ol/Feature}\n * @private\n */\n this.vertexFeature_ = null;\n\n if (!opt_options) {\n opt_options = {};\n }\n\n PointerInteraction.call(this, {\n handleDownEvent: handleDownEvent,\n handleDragEvent: handleDragEvent,\n handleEvent: handleEvent,\n handleUpEvent: handleUpEvent\n });\n\n /**\n * Layer for the extentFeature\n * @type {module:ol/layer/Vector}\n * @private\n */\n this.extentOverlay_ = new VectorLayer({\n source: new VectorSource({\n useSpatialIndex: false,\n wrapX: !!opt_options.wrapX\n }),\n style: opt_options.boxStyle ? opt_options.boxStyle : getDefaultExtentStyleFunction(),\n updateWhileAnimating: true,\n updateWhileInteracting: true\n });\n\n /**\n * Layer for the vertexFeature\n * @type {module:ol/layer/Vector}\n * @private\n */\n this.vertexOverlay_ = new VectorLayer({\n source: new VectorSource({\n useSpatialIndex: false,\n wrapX: !!opt_options.wrapX\n }),\n style: opt_options.pointerStyle ? opt_options.pointerStyle : getDefaultPointerStyleFunction(),\n updateWhileAnimating: true,\n updateWhileInteracting: true\n });\n\n if (opt_options.extent) {\n this.setExtent(opt_options.extent);\n }\n};\n\ninherits(ExtentInteraction, PointerInteraction);\n\n/**\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Event.\n * @return {boolean} Propagate event?\n * @this {module:ol/interaction/Extent~Extent}\n */\nfunction handleEvent(mapBrowserEvent) {\n if (!(mapBrowserEvent instanceof MapBrowserPointerEvent)) {\n return true;\n }\n //display pointer (if not dragging)\n if (mapBrowserEvent.type == MapBrowserEventType.POINTERMOVE && !this.handlingDownUpSequence) {\n this.handlePointerMove_(mapBrowserEvent);\n }\n //call pointer to determine up/down/drag\n handlePointerEvent.call(this, mapBrowserEvent);\n //return false to stop propagation\n return false;\n}\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Event handled?\n * @this {module:ol/interaction/Extent~Extent}\n */\nfunction handleDownEvent(mapBrowserEvent) {\n const pixel = mapBrowserEvent.pixel;\n const map = mapBrowserEvent.map;\n\n const extent = this.getExtent();\n let vertex = this.snapToVertex_(pixel, map);\n\n //find the extent corner opposite the passed corner\n const getOpposingPoint = function(point) {\n let x_ = null;\n let y_ = null;\n if (point[0] == extent[0]) {\n x_ = extent[2];\n } else if (point[0] == extent[2]) {\n x_ = extent[0];\n }\n if (point[1] == extent[1]) {\n y_ = extent[3];\n } else if (point[1] == extent[3]) {\n y_ = extent[1];\n }\n if (x_ !== null && y_ !== null) {\n return [x_, y_];\n }\n return null;\n };\n if (vertex && extent) {\n const x = (vertex[0] == extent[0] || vertex[0] == extent[2]) ? vertex[0] : null;\n const y = (vertex[1] == extent[1] || vertex[1] == extent[3]) ? vertex[1] : null;\n\n //snap to point\n if (x !== null && y !== null) {\n this.pointerHandler_ = getPointHandler(getOpposingPoint(vertex));\n //snap to edge\n } else if (x !== null) {\n this.pointerHandler_ = getEdgeHandler(\n getOpposingPoint([x, extent[1]]),\n getOpposingPoint([x, extent[3]])\n );\n } else if (y !== null) {\n this.pointerHandler_ = getEdgeHandler(\n getOpposingPoint([extent[0], y]),\n getOpposingPoint([extent[2], y])\n );\n }\n //no snap - new bbox\n } else {\n vertex = map.getCoordinateFromPixel(pixel);\n this.setExtent([vertex[0], vertex[1], vertex[0], vertex[1]]);\n this.pointerHandler_ = getPointHandler(vertex);\n }\n return true; //event handled; start downup sequence\n}\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Event handled?\n * @this {module:ol/interaction/Extent~Extent}\n */\nfunction handleDragEvent(mapBrowserEvent) {\n if (this.pointerHandler_) {\n const pixelCoordinate = mapBrowserEvent.coordinate;\n this.setExtent(this.pointerHandler_(pixelCoordinate));\n this.createOrUpdatePointerFeature_(pixelCoordinate);\n }\n return true;\n}\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserEvent Event.\n * @return {boolean} Stop drag sequence?\n * @this {module:ol/interaction/Extent~Extent}\n */\nfunction handleUpEvent(mapBrowserEvent) {\n this.pointerHandler_ = null;\n //If bbox is zero area, set to null;\n const extent = this.getExtent();\n if (!extent || getArea(extent) === 0) {\n this.setExtent(null);\n }\n return false; //Stop handling downup sequence\n}\n\n/**\n * Returns the default style for the drawn bbox\n *\n * @return {module:ol/style/Style~StyleFunction} Default Extent style\n */\nfunction getDefaultExtentStyleFunction() {\n const style = createEditingStyle();\n return function(feature, resolution) {\n return style[GeometryType.POLYGON];\n };\n}\n\n/**\n * Returns the default style for the pointer\n *\n * @return {module:ol/style/Style~StyleFunction} Default pointer style\n */\nfunction getDefaultPointerStyleFunction() {\n const style = createEditingStyle();\n return function(feature, resolution) {\n return style[GeometryType.POINT];\n };\n}\n\n/**\n * @param {module:ol/coordinate~Coordinate} fixedPoint corner that will be unchanged in the new extent\n * @returns {function (module:ol/coordinate~Coordinate): module:ol/extent~Extent} event handler\n */\nfunction getPointHandler(fixedPoint) {\n return function(point) {\n return boundingExtent([fixedPoint, point]);\n };\n}\n\n/**\n * @param {module:ol/coordinate~Coordinate} fixedP1 first corner that will be unchanged in the new extent\n * @param {module:ol/coordinate~Coordinate} fixedP2 second corner that will be unchanged in the new extent\n * @returns {function (module:ol/coordinate~Coordinate): module:ol/extent~Extent|null} event handler\n */\nfunction getEdgeHandler(fixedP1, fixedP2) {\n if (fixedP1[0] == fixedP2[0]) {\n return function(point) {\n return boundingExtent([fixedP1, [point[0], fixedP2[1]]]);\n };\n } else if (fixedP1[1] == fixedP2[1]) {\n return function(point) {\n return boundingExtent([fixedP1, [fixedP2[0], point[1]]]);\n };\n } else {\n return null;\n }\n}\n\n/**\n * @param {module:ol/extent~Extent} extent extent\n * @returns {Array<Array<module:ol/coordinate~Coordinate>>} extent line segments\n */\nfunction getSegments(extent) {\n return [\n [[extent[0], extent[1]], [extent[0], extent[3]]],\n [[extent[0], extent[3]], [extent[2], extent[3]]],\n [[extent[2], extent[3]], [extent[2], extent[1]]],\n [[extent[2], extent[1]], [extent[0], extent[1]]]\n ];\n}\n\n/**\n * @param {module:ol~Pixel} pixel cursor location\n * @param {module:ol/PluggableMap} map map\n * @returns {module:ol/coordinate~Coordinate|null} snapped vertex on extent\n * @private\n */\nExtentInteraction.prototype.snapToVertex_ = function(pixel, map) {\n const pixelCoordinate = map.getCoordinateFromPixel(pixel);\n const sortByDistance = function(a, b) {\n return squaredDistanceToSegment(pixelCoordinate, a) -\n squaredDistanceToSegment(pixelCoordinate, b);\n };\n const extent = this.getExtent();\n if (extent) {\n //convert extents to line segments and find the segment closest to pixelCoordinate\n const segments = getSegments(extent);\n segments.sort(sortByDistance);\n const closestSegment = segments[0];\n\n let vertex = (closestOnSegment(pixelCoordinate,\n closestSegment));\n const vertexPixel = map.getPixelFromCoordinate(vertex);\n\n //if the distance is within tolerance, snap to the segment\n if (coordinateDistance(pixel, vertexPixel) <= this.pixelTolerance_) {\n //test if we should further snap to a vertex\n const pixel1 = map.getPixelFromCoordinate(closestSegment[0]);\n const pixel2 = map.getPixelFromCoordinate(closestSegment[1]);\n const squaredDist1 = squaredCoordinateDistance(vertexPixel, pixel1);\n const squaredDist2 = squaredCoordinateDistance(vertexPixel, pixel2);\n const dist = Math.sqrt(Math.min(squaredDist1, squaredDist2));\n this.snappedToVertex_ = dist <= this.pixelTolerance_;\n if (this.snappedToVertex_) {\n vertex = squaredDist1 > squaredDist2 ?\n closestSegment[1] : closestSegment[0];\n }\n return vertex;\n }\n }\n return null;\n};\n\n/**\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent pointer move event\n * @private\n */\nExtentInteraction.prototype.handlePointerMove_ = function(mapBrowserEvent) {\n const pixel = mapBrowserEvent.pixel;\n const map = mapBrowserEvent.map;\n\n let vertex = this.snapToVertex_(pixel, map);\n if (!vertex) {\n vertex = map.getCoordinateFromPixel(pixel);\n }\n this.createOrUpdatePointerFeature_(vertex);\n};\n\n/**\n * @param {module:ol/extent~Extent} extent extent\n * @returns {module:ol/Feature} extent as featrue\n * @private\n */\nExtentInteraction.prototype.createOrUpdateExtentFeature_ = function(extent) {\n let extentFeature = this.extentFeature_;\n\n if (!extentFeature) {\n if (!extent) {\n extentFeature = new Feature({});\n } else {\n extentFeature = new Feature(polygonFromExtent(extent));\n }\n this.extentFeature_ = extentFeature;\n this.extentOverlay_.getSource().addFeature(extentFeature);\n } else {\n if (!extent) {\n extentFeature.setGeometry(undefined);\n } else {\n extentFeature.setGeometry(polygonFromExtent(extent));\n }\n }\n return extentFeature;\n};\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} vertex location of feature\n * @returns {module:ol/Feature} vertex as feature\n * @private\n */\nExtentInteraction.prototype.createOrUpdatePointerFeature_ = function(vertex) {\n let vertexFeature = this.vertexFeature_;\n if (!vertexFeature) {\n vertexFeature = new Feature(new Point(vertex));\n this.vertexFeature_ = vertexFeature;\n this.vertexOverlay_.getSource().addFeature(vertexFeature);\n } else {\n const geometry = /** @type {module:ol/geom/Point} */ (vertexFeature.getGeometry());\n geometry.setCoordinates(vertex);\n }\n return vertexFeature;\n};\n\n\n/**\n * @inheritDoc\n */\nExtentInteraction.prototype.setMap = function(map) {\n this.extentOverlay_.setMap(map);\n this.vertexOverlay_.setMap(map);\n PointerInteraction.prototype.setMap.call(this, map);\n};\n\n/**\n * Returns the current drawn extent in the view projection\n *\n * @return {module:ol/extent~Extent} Drawn extent in the view projection.\n * @api\n */\nExtentInteraction.prototype.getExtent = function() {\n return this.extent_;\n};\n\n/**\n * Manually sets the drawn extent, using the view projection.\n *\n * @param {module:ol/extent~Extent} extent Extent\n * @api\n */\nExtentInteraction.prototype.setExtent = function(extent) {\n //Null extent means no bbox\n this.extent_ = extent ? extent : null;\n this.createOrUpdateExtentFeature_(extent);\n this.dispatchEvent(new ExtentInteractionEvent(this.extent_));\n};\n\n\nexport default ExtentInteraction;\n","/**\n * @module ol/interaction/Modify\n */\nimport {getUid, inherits} from '../util.js';\nimport Collection from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport Feature from '../Feature.js';\nimport MapBrowserEventType from '../MapBrowserEventType.js';\nimport MapBrowserPointerEvent from '../MapBrowserPointerEvent.js';\nimport {equals} from '../array.js';\nimport {equals as coordinatesEqual, distance as coordinateDistance, squaredDistance as squaredCoordinateDistance, squaredDistanceToSegment, closestOnSegment} from '../coordinate.js';\nimport {listen, unlisten} from '../events.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport {always, primaryAction, altKeyOnly, singleClick} from '../events/condition.js';\nimport {boundingExtent, buffer, createOrUpdateFromCoordinate} from '../extent.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport Point from '../geom/Point.js';\nimport PointerInteraction, {handleEvent as handlePointerEvent} from '../interaction/Pointer.js';\nimport VectorLayer from '../layer/Vector.js';\nimport VectorSource from '../source/Vector.js';\nimport VectorEventType from '../source/VectorEventType.js';\nimport RBush from '../structs/RBush.js';\nimport {createEditingStyle} from '../style/Style.js';\n\n\n/**\n * @enum {string}\n */\nconst ModifyEventType = {\n /**\n * Triggered upon feature modification start\n * @event ModifyEvent#modifystart\n * @api\n */\n MODIFYSTART: 'modifystart',\n /**\n * Triggered upon feature modification end\n * @event ModifyEvent#modifyend\n * @api\n */\n MODIFYEND: 'modifyend'\n};\n\n\n/**\n * @typedef {Object} SegmentData\n * @property {Array.<number>} [depth]\n * @property {module:ol/Feature} feature\n * @property {module:ol/geom/SimpleGeometry} geometry\n * @property {number} index\n * @property {Array.<module:ol/extent~Extent>} segment\n * @property {Array.<module:ol/interaction/Modify~SegmentData>} [featureSegments]\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/events/condition~Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event will be considered to add or move a\n * vertex to the sketch. Default is\n * {@link module:ol/events/condition~primaryAction}.\n * @property {module:ol/events/condition~Condition} [deleteCondition] A function\n * that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. By default,\n * {@link module:ol/events/condition~singleClick} with\n * {@link module:ol/events/condition~altKeyOnly} results in a vertex deletion.\n * @property {module:ol/events/condition~Condition} [insertVertexCondition] A\n * function that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and\n * returns a boolean to indicate whether a new vertex can be added to the sketch\n * features. Default is {@link module:ol/events/condition~always}.\n * @property {number} [pixelTolerance=10] Pixel tolerance for considering the\n * pointer close enough to a segment or vertex for editing.\n * @property {module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction} [style]\n * Style used for the features being modified. By default the default edit\n * style is used (see {@link module:ol/style}).\n * @property {module:ol/source/Vector} [source] The vector source with\n * features to modify. If a vector source is not provided, a feature collection\n * must be provided with the features option.\n * @property {module:ol/Collection.<module:ol/Feature>} [features]\n * The features the interaction works on. If a feature collection is not\n * provided, a vector source must be provided with the source option.\n * @property {boolean} [wrapX=false] Wrap the world horizontally on the sketch\n * overlay.\n */\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/Modify~Modify} instances are\n * instances of this type.\n *\n * @constructor\n * @extends {module:ol/events/Event}\n * @param {ModifyEventType} type Type.\n * @param {module:ol/Collection.<module:ol/Feature>} features\n * The features modified.\n * @param {module:ol/MapBrowserPointerEvent} mapBrowserPointerEvent\n * Associated {@link module:ol/MapBrowserPointerEvent}.\n */\nexport const ModifyEvent = function(type, features, mapBrowserPointerEvent) {\n\n Event.call(this, type);\n\n /**\n * The features being modified.\n * @type {module:ol/Collection.<module:ol/Feature>}\n * @api\n */\n this.features = features;\n\n /**\n * Associated {@link module:ol/MapBrowserEvent}.\n * @type {module:ol/MapBrowserEvent}\n * @api\n */\n this.mapBrowserEvent = mapBrowserPointerEvent;\n};\n\ninherits(ModifyEvent, Event);\n\n\n/**\n * @classdesc\n * Interaction for modifying feature geometries. To modify features that have\n * been added to an existing source, construct the modify interaction with the\n * `source` option. If you want to modify features in a collection (for example,\n * the collection used by a select interaction), construct the interaction with\n * the `features` option. The interaction must be constructed with either a\n * `source` or `features` option.\n *\n * By default, the interaction will allow deletion of vertices when the `alt`\n * key is pressed. To configure the interaction with a different condition\n * for deletion, use the `deleteCondition` option.\n *\n * @constructor\n * @extends {module:ol/interaction/Pointer}\n * @param {module:ol/interaction/Modify~Options} options Options.\n * @fires module:ol/interaction/Modify~ModifyEvent\n * @api\n */\nconst Modify = function(options) {\n\n PointerInteraction.call(this, {\n handleDownEvent: handleDownEvent,\n handleDragEvent: handleDragEvent,\n handleEvent: handleEvent,\n handleUpEvent: handleUpEvent\n });\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.condition_ = options.condition ? options.condition : primaryAction;\n\n\n /**\n * @private\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Browser event.\n * @return {boolean} Combined condition result.\n */\n this.defaultDeleteCondition_ = function(mapBrowserEvent) {\n return altKeyOnly(mapBrowserEvent) && singleClick(mapBrowserEvent);\n };\n\n /**\n * @type {module:ol/events/condition~Condition}\n * @private\n */\n this.deleteCondition_ = options.deleteCondition ?\n options.deleteCondition : this.defaultDeleteCondition_;\n\n /**\n * @type {module:ol/events/condition~Condition}\n * @private\n */\n this.insertVertexCondition_ = options.insertVertexCondition ?\n options.insertVertexCondition : always;\n\n /**\n * Editing vertex.\n * @type {module:ol/Feature}\n * @private\n */\n this.vertexFeature_ = null;\n\n /**\n * Segments intersecting {@link this.vertexFeature_} by segment uid.\n * @type {Object.<string, boolean>}\n * @private\n */\n this.vertexSegments_ = null;\n\n /**\n * @type {module:ol~Pixel}\n * @private\n */\n this.lastPixel_ = [0, 0];\n\n /**\n * Tracks if the next `singleclick` event should be ignored to prevent\n * accidental deletion right after vertex creation.\n * @type {boolean}\n * @private\n */\n this.ignoreNextSingleClick_ = false;\n\n /**\n * @type {boolean}\n * @private\n */\n this.modified_ = false;\n\n /**\n * Segment RTree for each layer\n * @type {module:ol/structs/RBush.<module:ol/interaction/Modify~SegmentData>}\n * @private\n */\n this.rBush_ = new RBush();\n\n /**\n * @type {number}\n * @private\n */\n this.pixelTolerance_ = options.pixelTolerance !== undefined ?\n options.pixelTolerance : 10;\n\n /**\n * @type {boolean}\n * @private\n */\n this.snappedToVertex_ = false;\n\n /**\n * Indicate whether the interaction is currently changing a feature's\n * coordinates.\n * @type {boolean}\n * @private\n */\n this.changingFeature_ = false;\n\n /**\n * @type {Array}\n * @private\n */\n this.dragSegments_ = [];\n\n /**\n * Draw overlay where sketch features are drawn.\n * @type {module:ol/layer/Vector}\n * @private\n */\n this.overlay_ = new VectorLayer({\n source: new VectorSource({\n useSpatialIndex: false,\n wrapX: !!options.wrapX\n }),\n style: options.style ? options.style :\n getDefaultStyleFunction(),\n updateWhileAnimating: true,\n updateWhileInteracting: true\n });\n\n /**\n * @const\n * @private\n * @type {!Object.<string, function(module:ol/Feature, module:ol/geom/Geometry)>}\n */\n this.SEGMENT_WRITERS_ = {\n 'Point': this.writePointGeometry_,\n 'LineString': this.writeLineStringGeometry_,\n 'LinearRing': this.writeLineStringGeometry_,\n 'Polygon': this.writePolygonGeometry_,\n 'MultiPoint': this.writeMultiPointGeometry_,\n 'MultiLineString': this.writeMultiLineStringGeometry_,\n 'MultiPolygon': this.writeMultiPolygonGeometry_,\n 'Circle': this.writeCircleGeometry_,\n 'GeometryCollection': this.writeGeometryCollectionGeometry_\n };\n\n\n /**\n * @type {module:ol/source/Vector}\n * @private\n */\n this.source_ = null;\n\n let features;\n if (options.source) {\n this.source_ = options.source;\n features = new Collection(this.source_.getFeatures());\n listen(this.source_, VectorEventType.ADDFEATURE,\n this.handleSourceAdd_, this);\n listen(this.source_, VectorEventType.REMOVEFEATURE,\n this.handleSourceRemove_, this);\n } else {\n features = options.features;\n }\n if (!features) {\n throw new Error('The modify interaction requires features or a source');\n }\n\n /**\n * @type {module:ol/Collection.<module:ol/Feature>}\n * @private\n */\n this.features_ = features;\n\n this.features_.forEach(this.addFeature_.bind(this));\n listen(this.features_, CollectionEventType.ADD,\n this.handleFeatureAdd_, this);\n listen(this.features_, CollectionEventType.REMOVE,\n this.handleFeatureRemove_, this);\n\n /**\n * @type {module:ol/MapBrowserPointerEvent}\n * @private\n */\n this.lastPointerEvent_ = null;\n\n};\n\ninherits(Modify, PointerInteraction);\n\n\n/**\n * The segment index assigned to a circle's center when\n * breaking up a circle into ModifySegmentDataType segments.\n * @type {number}\n */\nconst CIRCLE_CENTER_INDEX = 0;\n\n/**\n * The segment index assigned to a circle's circumference when\n * breaking up a circle into ModifySegmentDataType segments.\n * @type {number}\n */\nconst CIRCLE_CIRCUMFERENCE_INDEX = 1;\n\n\n/**\n * @param {module:ol/Feature} feature Feature.\n * @private\n */\nModify.prototype.addFeature_ = function(feature) {\n const geometry = feature.getGeometry();\n if (geometry && geometry.getType() in this.SEGMENT_WRITERS_) {\n this.SEGMENT_WRITERS_[geometry.getType()].call(this, feature, geometry);\n }\n const map = this.getMap();\n if (map && map.isRendered() && this.getActive()) {\n this.handlePointerAtPixel_(this.lastPixel_, map);\n }\n listen(feature, EventType.CHANGE,\n this.handleFeatureChange_, this);\n};\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} evt Map browser event\n * @private\n */\nModify.prototype.willModifyFeatures_ = function(evt) {\n if (!this.modified_) {\n this.modified_ = true;\n this.dispatchEvent(new ModifyEvent(\n ModifyEventType.MODIFYSTART, this.features_, evt));\n }\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature.\n * @private\n */\nModify.prototype.removeFeature_ = function(feature) {\n this.removeFeatureSegmentData_(feature);\n // Remove the vertex feature if the collection of canditate features\n // is empty.\n if (this.vertexFeature_ && this.features_.getLength() === 0) {\n this.overlay_.getSource().removeFeature(this.vertexFeature_);\n this.vertexFeature_ = null;\n }\n unlisten(feature, EventType.CHANGE,\n this.handleFeatureChange_, this);\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature.\n * @private\n */\nModify.prototype.removeFeatureSegmentData_ = function(feature) {\n const rBush = this.rBush_;\n const /** @type {Array.<module:ol/interaction/Modify~SegmentData>} */ nodesToRemove = [];\n rBush.forEach(\n /**\n * @param {module:ol/interaction/Modify~SegmentData} node RTree node.\n */\n function(node) {\n if (feature === node.feature) {\n nodesToRemove.push(node);\n }\n });\n for (let i = nodesToRemove.length - 1; i >= 0; --i) {\n rBush.remove(nodesToRemove[i]);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nModify.prototype.setActive = function(active) {\n if (this.vertexFeature_ && !active) {\n this.overlay_.getSource().removeFeature(this.vertexFeature_);\n this.vertexFeature_ = null;\n }\n PointerInteraction.prototype.setActive.call(this, active);\n};\n\n\n/**\n * @inheritDoc\n */\nModify.prototype.setMap = function(map) {\n this.overlay_.setMap(map);\n PointerInteraction.prototype.setMap.call(this, map);\n};\n\n\n/**\n * @param {module:ol/source/Vector~VectorSourceEvent} event Event.\n * @private\n */\nModify.prototype.handleSourceAdd_ = function(event) {\n if (event.feature) {\n this.features_.push(event.feature);\n }\n};\n\n\n/**\n * @param {module:ol/source/Vector~VectorSourceEvent} event Event.\n * @private\n */\nModify.prototype.handleSourceRemove_ = function(event) {\n if (event.feature) {\n this.features_.remove(event.feature);\n }\n};\n\n\n/**\n * @param {module:ol/Collection~CollectionEvent} evt Event.\n * @private\n */\nModify.prototype.handleFeatureAdd_ = function(evt) {\n this.addFeature_(/** @type {module:ol/Feature} */ (evt.element));\n};\n\n\n/**\n * @param {module:ol/events/Event} evt Event.\n * @private\n */\nModify.prototype.handleFeatureChange_ = function(evt) {\n if (!this.changingFeature_) {\n const feature = /** @type {module:ol/Feature} */ (evt.target);\n this.removeFeature_(feature);\n this.addFeature_(feature);\n }\n};\n\n\n/**\n * @param {module:ol/Collection~CollectionEvent} evt Event.\n * @private\n */\nModify.prototype.handleFeatureRemove_ = function(evt) {\n const feature = /** @type {module:ol/Feature} */ (evt.element);\n this.removeFeature_(feature);\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/Point} geometry Geometry.\n * @private\n */\nModify.prototype.writePointGeometry_ = function(feature, geometry) {\n const coordinates = geometry.getCoordinates();\n const segmentData = /** @type {module:ol/interaction/Modify~SegmentData} */ ({\n feature: feature,\n geometry: geometry,\n segment: [coordinates, coordinates]\n });\n this.rBush_.insert(geometry.getExtent(), segmentData);\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/MultiPoint} geometry Geometry.\n * @private\n */\nModify.prototype.writeMultiPointGeometry_ = function(feature, geometry) {\n const points = geometry.getCoordinates();\n for (let i = 0, ii = points.length; i < ii; ++i) {\n const coordinates = points[i];\n const segmentData = /** @type {module:ol/interaction/Modify~SegmentData} */ ({\n feature: feature,\n geometry: geometry,\n depth: [i],\n index: i,\n segment: [coordinates, coordinates]\n });\n this.rBush_.insert(geometry.getExtent(), segmentData);\n }\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/LineString} geometry Geometry.\n * @private\n */\nModify.prototype.writeLineStringGeometry_ = function(feature, geometry) {\n const coordinates = geometry.getCoordinates();\n for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n const segment = coordinates.slice(i, i + 2);\n const segmentData = /** @type {module:ol/interaction/Modify~SegmentData} */ ({\n feature: feature,\n geometry: geometry,\n index: i,\n segment: segment\n });\n this.rBush_.insert(boundingExtent(segment), segmentData);\n }\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/MultiLineString} geometry Geometry.\n * @private\n */\nModify.prototype.writeMultiLineStringGeometry_ = function(feature, geometry) {\n const lines = geometry.getCoordinates();\n for (let j = 0, jj = lines.length; j < jj; ++j) {\n const coordinates = lines[j];\n for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n const segment = coordinates.slice(i, i + 2);\n const segmentData = /** @type {module:ol/interaction/Modify~SegmentData} */ ({\n feature: feature,\n geometry: geometry,\n depth: [j],\n index: i,\n segment: segment\n });\n this.rBush_.insert(boundingExtent(segment), segmentData);\n }\n }\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/Polygon} geometry Geometry.\n * @private\n */\nModify.prototype.writePolygonGeometry_ = function(feature, geometry) {\n const rings = geometry.getCoordinates();\n for (let j = 0, jj = rings.length; j < jj; ++j) {\n const coordinates = rings[j];\n for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n const segment = coordinates.slice(i, i + 2);\n const segmentData = /** @type {module:ol/interaction/Modify~SegmentData} */ ({\n feature: feature,\n geometry: geometry,\n depth: [j],\n index: i,\n segment: segment\n });\n this.rBush_.insert(boundingExtent(segment), segmentData);\n }\n }\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/MultiPolygon} geometry Geometry.\n * @private\n */\nModify.prototype.writeMultiPolygonGeometry_ = function(feature, geometry) {\n const polygons = geometry.getCoordinates();\n for (let k = 0, kk = polygons.length; k < kk; ++k) {\n const rings = polygons[k];\n for (let j = 0, jj = rings.length; j < jj; ++j) {\n const coordinates = rings[j];\n for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n const segment = coordinates.slice(i, i + 2);\n const segmentData = /** @type {module:ol/interaction/Modify~SegmentData} */ ({\n feature: feature,\n geometry: geometry,\n depth: [j, k],\n index: i,\n segment: segment\n });\n this.rBush_.insert(boundingExtent(segment), segmentData);\n }\n }\n }\n};\n\n\n/**\n * We convert a circle into two segments. The segment at index\n * {@link CIRCLE_CENTER_INDEX} is the\n * circle's center (a point). The segment at index\n * {@link CIRCLE_CIRCUMFERENCE_INDEX} is\n * the circumference, and is not a line segment.\n *\n * @param {module:ol/Feature} feature Feature.\n * @param {module:ol/geom/Circle} geometry Geometry.\n * @private\n */\nModify.prototype.writeCircleGeometry_ = function(feature, geometry) {\n const coordinates = geometry.getCenter();\n const centerSegmentData = /** @type {module:ol/interaction/Modify~SegmentData} */ ({\n feature: feature,\n geometry: geometry,\n index: CIRCLE_CENTER_INDEX,\n segment: [coordinates, coordinates]\n });\n const circumferenceSegmentData = /** @type {module:ol/interaction/Modify~SegmentData} */ ({\n feature: feature,\n geometry: geometry,\n index: CIRCLE_CIRCUMFERENCE_INDEX,\n segment: [coordinates, coordinates]\n });\n const featureSegments = [centerSegmentData, circumferenceSegmentData];\n centerSegmentData.featureSegments = circumferenceSegmentData.featureSegments = featureSegments;\n this.rBush_.insert(createOrUpdateFromCoordinate(coordinates), centerSegmentData);\n this.rBush_.insert(geometry.getExtent(), circumferenceSegmentData);\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/GeometryCollection} geometry Geometry.\n * @private\n */\nModify.prototype.writeGeometryCollectionGeometry_ = function(feature, geometry) {\n const geometries = geometry.getGeometriesArray();\n for (let i = 0; i < geometries.length; ++i) {\n this.SEGMENT_WRITERS_[geometries[i].getType()].call(this, feature, geometries[i]);\n }\n};\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} coordinates Coordinates.\n * @return {module:ol/Feature} Vertex feature.\n * @private\n */\nModify.prototype.createOrUpdateVertexFeature_ = function(coordinates) {\n let vertexFeature = this.vertexFeature_;\n if (!vertexFeature) {\n vertexFeature = new Feature(new Point(coordinates));\n this.vertexFeature_ = vertexFeature;\n this.overlay_.getSource().addFeature(vertexFeature);\n } else {\n const geometry = /** @type {module:ol/geom/Point} */ (vertexFeature.getGeometry());\n geometry.setCoordinates(coordinates);\n }\n return vertexFeature;\n};\n\n\n/**\n * @param {module:ol/interaction/Modify~SegmentData} a The first segment data.\n * @param {module:ol/interaction/Modify~SegmentData} b The second segment data.\n * @return {number} The difference in indexes.\n */\nfunction compareIndexes(a, b) {\n return a.index - b.index;\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} evt Event.\n * @return {boolean} Start drag sequence?\n * @this {module:ol/interaction/Modify}\n */\nfunction handleDownEvent(evt) {\n if (!this.condition_(evt)) {\n return false;\n }\n this.handlePointerAtPixel_(evt.pixel, evt.map);\n const pixelCoordinate = evt.map.getCoordinateFromPixel(evt.pixel);\n this.dragSegments_.length = 0;\n this.modified_ = false;\n const vertexFeature = this.vertexFeature_;\n if (vertexFeature) {\n const insertVertices = [];\n const geometry = /** @type {module:ol/geom/Point} */ (vertexFeature.getGeometry());\n const vertex = geometry.getCoordinates();\n const vertexExtent = boundingExtent([vertex]);\n const segmentDataMatches = this.rBush_.getInExtent(vertexExtent);\n const componentSegments = {};\n segmentDataMatches.sort(compareIndexes);\n for (let i = 0, ii = segmentDataMatches.length; i < ii; ++i) {\n const segmentDataMatch = segmentDataMatches[i];\n const segment = segmentDataMatch.segment;\n let uid = getUid(segmentDataMatch.feature);\n const depth = segmentDataMatch.depth;\n if (depth) {\n uid += '-' + depth.join('-'); // separate feature components\n }\n if (!componentSegments[uid]) {\n componentSegments[uid] = new Array(2);\n }\n if (segmentDataMatch.geometry.getType() === GeometryType.CIRCLE &&\n segmentDataMatch.index === CIRCLE_CIRCUMFERENCE_INDEX) {\n\n const closestVertex = closestOnSegmentData(pixelCoordinate, segmentDataMatch);\n if (coordinatesEqual(closestVertex, vertex) && !componentSegments[uid][0]) {\n this.dragSegments_.push([segmentDataMatch, 0]);\n componentSegments[uid][0] = segmentDataMatch;\n }\n } else if (coordinatesEqual(segment[0], vertex) &&\n !componentSegments[uid][0]) {\n this.dragSegments_.push([segmentDataMatch, 0]);\n componentSegments[uid][0] = segmentDataMatch;\n } else if (coordinatesEqual(segment[1], vertex) &&\n !componentSegments[uid][1]) {\n\n // prevent dragging closed linestrings by the connecting node\n if ((segmentDataMatch.geometry.getType() ===\n GeometryType.LINE_STRING ||\n segmentDataMatch.geometry.getType() ===\n GeometryType.MULTI_LINE_STRING) &&\n componentSegments[uid][0] &&\n componentSegments[uid][0].index === 0) {\n continue;\n }\n\n this.dragSegments_.push([segmentDataMatch, 1]);\n componentSegments[uid][1] = segmentDataMatch;\n } else if (this.insertVertexCondition_(evt) && getUid(segment) in this.vertexSegments_ &&\n (!componentSegments[uid][0] && !componentSegments[uid][1])) {\n insertVertices.push([segmentDataMatch, vertex]);\n }\n }\n if (insertVertices.length) {\n this.willModifyFeatures_(evt);\n }\n for (let j = insertVertices.length - 1; j >= 0; --j) {\n this.insertVertex_.apply(this, insertVertices[j]);\n }\n }\n return !!this.vertexFeature_;\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} evt Event.\n * @this {module:ol/interaction/Modify}\n */\nfunction handleDragEvent(evt) {\n this.ignoreNextSingleClick_ = false;\n this.willModifyFeatures_(evt);\n\n const vertex = evt.coordinate;\n for (let i = 0, ii = this.dragSegments_.length; i < ii; ++i) {\n const dragSegment = this.dragSegments_[i];\n const segmentData = dragSegment[0];\n const depth = segmentData.depth;\n const geometry = segmentData.geometry;\n let coordinates;\n const segment = segmentData.segment;\n const index = dragSegment[1];\n\n while (vertex.length < geometry.getStride()) {\n vertex.push(segment[index][vertex.length]);\n }\n\n switch (geometry.getType()) {\n case GeometryType.POINT:\n coordinates = vertex;\n segment[0] = segment[1] = vertex;\n break;\n case GeometryType.MULTI_POINT:\n coordinates = geometry.getCoordinates();\n coordinates[segmentData.index] = vertex;\n segment[0] = segment[1] = vertex;\n break;\n case GeometryType.LINE_STRING:\n coordinates = geometry.getCoordinates();\n coordinates[segmentData.index + index] = vertex;\n segment[index] = vertex;\n break;\n case GeometryType.MULTI_LINE_STRING:\n coordinates = geometry.getCoordinates();\n coordinates[depth[0]][segmentData.index + index] = vertex;\n segment[index] = vertex;\n break;\n case GeometryType.POLYGON:\n coordinates = geometry.getCoordinates();\n coordinates[depth[0]][segmentData.index + index] = vertex;\n segment[index] = vertex;\n break;\n case GeometryType.MULTI_POLYGON:\n coordinates = geometry.getCoordinates();\n coordinates[depth[1]][depth[0]][segmentData.index + index] = vertex;\n segment[index] = vertex;\n break;\n case GeometryType.CIRCLE:\n segment[0] = segment[1] = vertex;\n if (segmentData.index === CIRCLE_CENTER_INDEX) {\n this.changingFeature_ = true;\n geometry.setCenter(vertex);\n this.changingFeature_ = false;\n } else { // We're dragging the circle's circumference:\n this.changingFeature_ = true;\n geometry.setRadius(coordinateDistance(geometry.getCenter(), vertex));\n this.changingFeature_ = false;\n }\n break;\n default:\n // pass\n }\n\n if (coordinates) {\n this.setGeometryCoordinates_(geometry, coordinates);\n }\n }\n this.createOrUpdateVertexFeature_(vertex);\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} evt Event.\n * @return {boolean} Stop drag sequence?\n * @this {module:ol/interaction/Modify}\n */\nfunction handleUpEvent(evt) {\n for (let i = this.dragSegments_.length - 1; i >= 0; --i) {\n const segmentData = this.dragSegments_[i][0];\n const geometry = segmentData.geometry;\n if (geometry.getType() === GeometryType.CIRCLE) {\n // Update a circle object in the R* bush:\n const coordinates = geometry.getCenter();\n const centerSegmentData = segmentData.featureSegments[0];\n const circumferenceSegmentData = segmentData.featureSegments[1];\n centerSegmentData.segment[0] = centerSegmentData.segment[1] = coordinates;\n circumferenceSegmentData.segment[0] = circumferenceSegmentData.segment[1] = coordinates;\n this.rBush_.update(createOrUpdateFromCoordinate(coordinates), centerSegmentData);\n this.rBush_.update(geometry.getExtent(), circumferenceSegmentData);\n } else {\n this.rBush_.update(boundingExtent(segmentData.segment), segmentData);\n }\n }\n if (this.modified_) {\n this.dispatchEvent(new ModifyEvent(ModifyEventType.MODIFYEND, this.features_, evt));\n this.modified_ = false;\n }\n return false;\n}\n\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} and may modify the\n * geometry.\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @this {module:ol/interaction/Modify}\n */\nfunction handleEvent(mapBrowserEvent) {\n if (!(mapBrowserEvent instanceof MapBrowserPointerEvent)) {\n return true;\n }\n this.lastPointerEvent_ = mapBrowserEvent;\n\n let handled;\n if (!mapBrowserEvent.map.getView().getInteracting() &&\n mapBrowserEvent.type == MapBrowserEventType.POINTERMOVE &&\n !this.handlingDownUpSequence) {\n this.handlePointerMove_(mapBrowserEvent);\n }\n if (this.vertexFeature_ && this.deleteCondition_(mapBrowserEvent)) {\n if (mapBrowserEvent.type != MapBrowserEventType.SINGLECLICK || !this.ignoreNextSingleClick_) {\n handled = this.removePoint();\n } else {\n handled = true;\n }\n }\n\n if (mapBrowserEvent.type == MapBrowserEventType.SINGLECLICK) {\n this.ignoreNextSingleClick_ = false;\n }\n\n return handlePointerEvent.call(this, mapBrowserEvent) && !handled;\n}\n\n\n/**\n * @param {module:ol/MapBrowserEvent} evt Event.\n * @private\n */\nModify.prototype.handlePointerMove_ = function(evt) {\n this.lastPixel_ = evt.pixel;\n this.handlePointerAtPixel_(evt.pixel, evt.map);\n};\n\n\n/**\n * @param {module:ol~Pixel} pixel Pixel\n * @param {module:ol/PluggableMap} map Map.\n * @private\n */\nModify.prototype.handlePointerAtPixel_ = function(pixel, map) {\n const pixelCoordinate = map.getCoordinateFromPixel(pixel);\n const sortByDistance = function(a, b) {\n return pointDistanceToSegmentDataSquared(pixelCoordinate, a) -\n pointDistanceToSegmentDataSquared(pixelCoordinate, b);\n };\n\n const box = buffer(createOrUpdateFromCoordinate(pixelCoordinate),\n map.getView().getResolution() * this.pixelTolerance_);\n\n const rBush = this.rBush_;\n const nodes = rBush.getInExtent(box);\n if (nodes.length > 0) {\n nodes.sort(sortByDistance);\n const node = nodes[0];\n const closestSegment = node.segment;\n let vertex = closestOnSegmentData(pixelCoordinate, node);\n const vertexPixel = map.getPixelFromCoordinate(vertex);\n let dist = coordinateDistance(pixel, vertexPixel);\n if (dist <= this.pixelTolerance_) {\n const vertexSegments = {};\n\n if (node.geometry.getType() === GeometryType.CIRCLE &&\n node.index === CIRCLE_CIRCUMFERENCE_INDEX) {\n\n this.snappedToVertex_ = true;\n this.createOrUpdateVertexFeature_(vertex);\n } else {\n const pixel1 = map.getPixelFromCoordinate(closestSegment[0]);\n const pixel2 = map.getPixelFromCoordinate(closestSegment[1]);\n const squaredDist1 = squaredCoordinateDistance(vertexPixel, pixel1);\n const squaredDist2 = squaredCoordinateDistance(vertexPixel, pixel2);\n dist = Math.sqrt(Math.min(squaredDist1, squaredDist2));\n this.snappedToVertex_ = dist <= this.pixelTolerance_;\n if (this.snappedToVertex_) {\n vertex = squaredDist1 > squaredDist2 ? closestSegment[1] : closestSegment[0];\n }\n this.createOrUpdateVertexFeature_(vertex);\n for (let i = 1, ii = nodes.length; i < ii; ++i) {\n const segment = nodes[i].segment;\n if ((coordinatesEqual(closestSegment[0], segment[0]) &&\n coordinatesEqual(closestSegment[1], segment[1]) ||\n (coordinatesEqual(closestSegment[0], segment[1]) &&\n coordinatesEqual(closestSegment[1], segment[0])))) {\n vertexSegments[getUid(segment)] = true;\n } else {\n break;\n }\n }\n }\n\n vertexSegments[getUid(closestSegment)] = true;\n this.vertexSegments_ = vertexSegments;\n return;\n }\n }\n if (this.vertexFeature_) {\n this.overlay_.getSource().removeFeature(this.vertexFeature_);\n this.vertexFeature_ = null;\n }\n};\n\n\n/**\n * Returns the distance from a point to a line segment.\n *\n * @param {module:ol/coordinate~Coordinate} pointCoordinates The coordinates of the point from\n * which to calculate the distance.\n * @param {module:ol/interaction/Modify~SegmentData} segmentData The object describing the line\n * segment we are calculating the distance to.\n * @return {number} The square of the distance between a point and a line segment.\n */\nfunction pointDistanceToSegmentDataSquared(pointCoordinates, segmentData) {\n const geometry = segmentData.geometry;\n\n if (geometry.getType() === GeometryType.CIRCLE) {\n const circleGeometry = /** @type {module:ol/geom/Circle} */ (geometry);\n\n if (segmentData.index === CIRCLE_CIRCUMFERENCE_INDEX) {\n const distanceToCenterSquared =\n squaredCoordinateDistance(circleGeometry.getCenter(), pointCoordinates);\n const distanceToCircumference =\n Math.sqrt(distanceToCenterSquared) - circleGeometry.getRadius();\n return distanceToCircumference * distanceToCircumference;\n }\n }\n return squaredDistanceToSegment(pointCoordinates, segmentData.segment);\n}\n\n/**\n * Returns the point closest to a given line segment.\n *\n * @param {module:ol/coordinate~Coordinate} pointCoordinates The point to which a closest point\n * should be found.\n * @param {module:ol/interaction/Modify~SegmentData} segmentData The object describing the line\n * segment which should contain the closest point.\n * @return {module:ol/coordinate~Coordinate} The point closest to the specified line segment.\n */\nfunction closestOnSegmentData(pointCoordinates, segmentData) {\n const geometry = segmentData.geometry;\n\n if (geometry.getType() === GeometryType.CIRCLE &&\n segmentData.index === CIRCLE_CIRCUMFERENCE_INDEX) {\n return geometry.getClosestPoint(pointCoordinates);\n }\n return closestOnSegment(pointCoordinates, segmentData.segment);\n}\n\n\n/**\n * @param {module:ol/interaction/Modify~SegmentData} segmentData Segment data.\n * @param {module:ol/coordinate~Coordinate} vertex Vertex.\n * @private\n */\nModify.prototype.insertVertex_ = function(segmentData, vertex) {\n const segment = segmentData.segment;\n const feature = segmentData.feature;\n const geometry = segmentData.geometry;\n const depth = segmentData.depth;\n const index = /** @type {number} */ (segmentData.index);\n let coordinates;\n\n while (vertex.length < geometry.getStride()) {\n vertex.push(0);\n }\n\n switch (geometry.getType()) {\n case GeometryType.MULTI_LINE_STRING:\n coordinates = geometry.getCoordinates();\n coordinates[depth[0]].splice(index + 1, 0, vertex);\n break;\n case GeometryType.POLYGON:\n coordinates = geometry.getCoordinates();\n coordinates[depth[0]].splice(index + 1, 0, vertex);\n break;\n case GeometryType.MULTI_POLYGON:\n coordinates = geometry.getCoordinates();\n coordinates[depth[1]][depth[0]].splice(index + 1, 0, vertex);\n break;\n case GeometryType.LINE_STRING:\n coordinates = geometry.getCoordinates();\n coordinates.splice(index + 1, 0, vertex);\n break;\n default:\n return;\n }\n\n this.setGeometryCoordinates_(geometry, coordinates);\n const rTree = this.rBush_;\n rTree.remove(segmentData);\n this.updateSegmentIndices_(geometry, index, depth, 1);\n const newSegmentData = /** @type {module:ol/interaction/Modify~SegmentData} */ ({\n segment: [segment[0], vertex],\n feature: feature,\n geometry: geometry,\n depth: depth,\n index: index\n });\n rTree.insert(boundingExtent(newSegmentData.segment),\n newSegmentData);\n this.dragSegments_.push([newSegmentData, 1]);\n\n const newSegmentData2 = /** @type {module:ol/interaction/Modify~SegmentData} */ ({\n segment: [vertex, segment[1]],\n feature: feature,\n geometry: geometry,\n depth: depth,\n index: index + 1\n });\n rTree.insert(boundingExtent(newSegmentData2.segment), newSegmentData2);\n this.dragSegments_.push([newSegmentData2, 0]);\n this.ignoreNextSingleClick_ = true;\n};\n\n/**\n * Removes the vertex currently being pointed.\n * @return {boolean} True when a vertex was removed.\n * @api\n */\nModify.prototype.removePoint = function() {\n if (this.lastPointerEvent_ && this.lastPointerEvent_.type != MapBrowserEventType.POINTERDRAG) {\n const evt = this.lastPointerEvent_;\n this.willModifyFeatures_(evt);\n this.removeVertex_();\n this.dispatchEvent(new ModifyEvent(ModifyEventType.MODIFYEND, this.features_, evt));\n this.modified_ = false;\n return true;\n }\n return false;\n};\n\n/**\n * Removes a vertex from all matching features.\n * @return {boolean} True when a vertex was removed.\n * @private\n */\nModify.prototype.removeVertex_ = function() {\n const dragSegments = this.dragSegments_;\n const segmentsByFeature = {};\n let deleted = false;\n let component, coordinates, dragSegment, geometry, i, index, left;\n let newIndex, right, segmentData, uid;\n for (i = dragSegments.length - 1; i >= 0; --i) {\n dragSegment = dragSegments[i];\n segmentData = dragSegment[0];\n uid = getUid(segmentData.feature);\n if (segmentData.depth) {\n // separate feature components\n uid += '-' + segmentData.depth.join('-');\n }\n if (!(uid in segmentsByFeature)) {\n segmentsByFeature[uid] = {};\n }\n if (dragSegment[1] === 0) {\n segmentsByFeature[uid].right = segmentData;\n segmentsByFeature[uid].index = segmentData.index;\n } else if (dragSegment[1] == 1) {\n segmentsByFeature[uid].left = segmentData;\n segmentsByFeature[uid].index = segmentData.index + 1;\n }\n\n }\n for (uid in segmentsByFeature) {\n right = segmentsByFeature[uid].right;\n left = segmentsByFeature[uid].left;\n index = segmentsByFeature[uid].index;\n newIndex = index - 1;\n if (left !== undefined) {\n segmentData = left;\n } else {\n segmentData = right;\n }\n if (newIndex < 0) {\n newIndex = 0;\n }\n geometry = segmentData.geometry;\n coordinates = geometry.getCoordinates();\n component = coordinates;\n deleted = false;\n switch (geometry.getType()) {\n case GeometryType.MULTI_LINE_STRING:\n if (coordinates[segmentData.depth[0]].length > 2) {\n coordinates[segmentData.depth[0]].splice(index, 1);\n deleted = true;\n }\n break;\n case GeometryType.LINE_STRING:\n if (coordinates.length > 2) {\n coordinates.splice(index, 1);\n deleted = true;\n }\n break;\n case GeometryType.MULTI_POLYGON:\n component = component[segmentData.depth[1]];\n /* falls through */\n case GeometryType.POLYGON:\n component = component[segmentData.depth[0]];\n if (component.length > 4) {\n if (index == component.length - 1) {\n index = 0;\n }\n component.splice(index, 1);\n deleted = true;\n if (index === 0) {\n // close the ring again\n component.pop();\n component.push(component[0]);\n newIndex = component.length - 1;\n }\n }\n break;\n default:\n // pass\n }\n\n if (deleted) {\n this.setGeometryCoordinates_(geometry, coordinates);\n const segments = [];\n if (left !== undefined) {\n this.rBush_.remove(left);\n segments.push(left.segment[0]);\n }\n if (right !== undefined) {\n this.rBush_.remove(right);\n segments.push(right.segment[1]);\n }\n if (left !== undefined && right !== undefined) {\n const newSegmentData = /** @type {module:ol/interaction/Modify~SegmentData} */ ({\n depth: segmentData.depth,\n feature: segmentData.feature,\n geometry: segmentData.geometry,\n index: newIndex,\n segment: segments\n });\n this.rBush_.insert(boundingExtent(newSegmentData.segment),\n newSegmentData);\n }\n this.updateSegmentIndices_(geometry, index, segmentData.depth, -1);\n if (this.vertexFeature_) {\n this.overlay_.getSource().removeFeature(this.vertexFeature_);\n this.vertexFeature_ = null;\n }\n dragSegments.length = 0;\n }\n\n }\n return deleted;\n};\n\n\n/**\n * @param {module:ol/geom/SimpleGeometry} geometry Geometry.\n * @param {Array} coordinates Coordinates.\n * @private\n */\nModify.prototype.setGeometryCoordinates_ = function(geometry, coordinates) {\n this.changingFeature_ = true;\n geometry.setCoordinates(coordinates);\n this.changingFeature_ = false;\n};\n\n\n/**\n * @param {module:ol/geom/SimpleGeometry} geometry Geometry.\n * @param {number} index Index.\n * @param {Array.<number>|undefined} depth Depth.\n * @param {number} delta Delta (1 or -1).\n * @private\n */\nModify.prototype.updateSegmentIndices_ = function(\n geometry, index, depth, delta) {\n this.rBush_.forEachInExtent(geometry.getExtent(), function(segmentDataMatch) {\n if (segmentDataMatch.geometry === geometry &&\n (depth === undefined || segmentDataMatch.depth === undefined ||\n equals(segmentDataMatch.depth, depth)) &&\n segmentDataMatch.index > index) {\n segmentDataMatch.index += delta;\n }\n });\n};\n\n\n/**\n * @return {module:ol/style/Style~StyleFunction} Styles.\n */\nfunction getDefaultStyleFunction() {\n const style = createEditingStyle();\n return function(feature, resolution) {\n return style[GeometryType.POINT];\n };\n}\n\n\nexport default Modify;\n","/**\n * @module ol/interaction/Select\n */\nimport {getUid, inherits} from '../util.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport {extend, includes} from '../array.js';\nimport {listen} from '../events.js';\nimport Event from '../events/Event.js';\nimport {singleClick, never, shiftKeyOnly, pointerMove} from '../events/condition.js';\nimport {TRUE} from '../functions.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport Interaction from '../interaction/Interaction.js';\nimport VectorLayer from '../layer/Vector.js';\nimport {clear} from '../obj.js';\nimport VectorSource from '../source/Vector.js';\nimport {createEditingStyle} from '../style/Style.js';\n\n\n/**\n * @enum {string}\n */\nconst SelectEventType = {\n /**\n * Triggered when feature(s) has been (de)selected.\n * @event SelectEvent#select\n * @api\n */\n SELECT: 'select'\n};\n\n\n/**\n * A function that takes an {@link module:ol/Feature} or\n * {@link module:ol/render/Feature} and an\n * {@link module:ol/layer/Layer} and returns `true` if the feature may be\n * selected or `false` otherwise.\n * @typedef {function((module:ol/Feature|module:ol/render/Feature), module:ol/layer/Layer):\n * boolean} FilterFunction\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/events/condition~Condition} [addCondition] A function\n * that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * By default, this is {@link module:ol/events/condition~never}. Use this if you\n * want to use different events for add and remove instead of `toggle`.\n * @property {module:ol/events/condition~Condition} [condition] A function that\n * takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. This is the event\n * for the selected features as a whole. By default, this is\n * {@link module:ol/events/condition~singleClick}. Clicking on a feature selects that\n * feature and removes any that were in the selection. Clicking outside any\n * feature removes all from the selection.\n * See `toggle`, `add`, `remove` options for adding/removing extra features to/\n * from the selection.\n * @property {Array.<module:ol/layer/Layer>|function(module:ol/layer/Layer): boolean} [layers]\n * A list of layers from which features should be selected. Alternatively, a\n * filter function can be provided. The function will be called for each layer\n * in the map and should return `true` for layers that you want to be\n * selectable. If the option is absent, all visible layers will be considered\n * selectable.\n * @property {module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction} [style]\n * Style for the selected features. By default the default edit style is used\n * (see {@link module:ol/style}).\n * @property {module:ol/events/condition~Condition} [removeCondition] A function\n * that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled.\n * By default, this is {@link module:ol/events/condition~never}. Use this if you\n * want to use different events for add and remove instead of `toggle`.\n * @property {module:ol/events/condition~Condition} [toggleCondition] A function\n * that takes an {@link module:ol/MapBrowserEvent~MapBrowserEvent} and returns a\n * boolean to indicate whether that event should be handled. This is in addition\n * to the `condition` event. By default,\n * {@link module:ol/events/condition~shiftKeyOnly}, i.e. pressing `shift` as\n * well as the `condition` event, adds that feature to the current selection if\n * it is not currently selected, and removes it if it is. See `add` and `remove`\n * if you want to use different events instead of a toggle.\n * @property {boolean} [multi=false] A boolean that determines if the default\n * behaviour should select only single features or all (overlapping) features at\n * the clicked map position. The default of `false` means single select.\n * @property {module:ol/Collection.<module:ol/Feature>} [features]\n * Collection where the interaction will place selected features. Optional. If\n * not set the interaction will create a collection. In any case the collection\n * used by the interaction is returned by\n * {@link module:ol/interaction/Select~Select#getFeatures}.\n * @property {module:ol/interaction/Select~FilterFunction} [filter] A function\n * that takes an {@link module:ol/Feature} and an\n * {@link module:ol/layer/Layer} and returns `true` if the feature may be\n * selected or `false` otherwise.\n * @property {boolean} [wrapX=true] Wrap the world horizontally on the selection\n * overlay.\n * @property {number} [hitTolerance=0] Hit-detection tolerance. Pixels inside\n * the radius around the given position will be checked for features. This only\n * works for the canvas renderer and not for WebGL.\n */\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/Select~Select} instances are instances of\n * this type.\n *\n * @param {SelectEventType} type The event type.\n * @param {Array.<module:ol/Feature>} selected Selected features.\n * @param {Array.<module:ol/Feature>} deselected Deselected features.\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Associated\n * {@link module:ol/MapBrowserEvent}.\n * @extends {module:ol/events/Event}\n * @constructor\n */\nconst SelectEvent = function(type, selected, deselected, mapBrowserEvent) {\n Event.call(this, type);\n\n /**\n * Selected features array.\n * @type {Array.<module:ol/Feature>}\n * @api\n */\n this.selected = selected;\n\n /**\n * Deselected features array.\n * @type {Array.<module:ol/Feature>}\n * @api\n */\n this.deselected = deselected;\n\n /**\n * Associated {@link module:ol/MapBrowserEvent}.\n * @type {module:ol/MapBrowserEvent}\n * @api\n */\n this.mapBrowserEvent = mapBrowserEvent;\n};\n\ninherits(SelectEvent, Event);\n\n\n/**\n * @classdesc\n * Interaction for selecting vector features. By default, selected features are\n * styled differently, so this interaction can be used for visual highlighting,\n * as well as selecting features for other actions, such as modification or\n * output. There are three ways of controlling which features are selected:\n * using the browser event as defined by the `condition` and optionally the\n * `toggle`, `add`/`remove`, and `multi` options; a `layers` filter; and a\n * further feature filter using the `filter` option.\n *\n * Selected features are added to an internal unmanaged layer.\n *\n * @constructor\n * @extends {module:ol/interaction/Interaction}\n * @param {module:ol/interaction/Select~Options=} opt_options Options.\n * @fires SelectEvent\n * @api\n */\nconst Select = function(opt_options) {\n\n Interaction.call(this, {\n handleEvent: handleEvent\n });\n\n const options = opt_options ? opt_options : {};\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.condition_ = options.condition ? options.condition : singleClick;\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.addCondition_ = options.addCondition ? options.addCondition : never;\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.removeCondition_ = options.removeCondition ? options.removeCondition : never;\n\n /**\n * @private\n * @type {module:ol/events/condition~Condition}\n */\n this.toggleCondition_ = options.toggleCondition ? options.toggleCondition : shiftKeyOnly;\n\n /**\n * @private\n * @type {boolean}\n */\n this.multi_ = options.multi ? options.multi : false;\n\n /**\n * @private\n * @type {module:ol/interaction/Select~FilterFunction}\n */\n this.filter_ = options.filter ? options.filter : TRUE;\n\n /**\n * @private\n * @type {number}\n */\n this.hitTolerance_ = options.hitTolerance ? options.hitTolerance : 0;\n\n const featureOverlay = new VectorLayer({\n source: new VectorSource({\n useSpatialIndex: false,\n features: options.features,\n wrapX: options.wrapX\n }),\n style: options.style ? options.style :\n getDefaultStyleFunction(),\n updateWhileAnimating: true,\n updateWhileInteracting: true\n });\n\n /**\n * @private\n * @type {module:ol/layer/Vector}\n */\n this.featureOverlay_ = featureOverlay;\n\n /** @type {function(module:ol/layer/Layer): boolean} */\n let layerFilter;\n if (options.layers) {\n if (typeof options.layers === 'function') {\n layerFilter = options.layers;\n } else {\n const layers = options.layers;\n layerFilter = function(layer) {\n return includes(layers, layer);\n };\n }\n } else {\n layerFilter = TRUE;\n }\n\n /**\n * @private\n * @type {function(module:ol/layer/Layer): boolean}\n */\n this.layerFilter_ = layerFilter;\n\n /**\n * An association between selected feature (key)\n * and layer (value)\n * @private\n * @type {Object.<number, module:ol/layer/Layer>}\n */\n this.featureLayerAssociation_ = {};\n\n const features = this.featureOverlay_.getSource().getFeaturesCollection();\n listen(features, CollectionEventType.ADD,\n this.addFeature_, this);\n listen(features, CollectionEventType.REMOVE,\n this.removeFeature_, this);\n\n};\n\ninherits(Select, Interaction);\n\n\n/**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @param {module:ol/layer/Layer} layer Layer.\n * @private\n */\nSelect.prototype.addFeatureLayerAssociation_ = function(feature, layer) {\n const key = getUid(feature);\n this.featureLayerAssociation_[key] = layer;\n};\n\n\n/**\n * Get the selected features.\n * @return {module:ol/Collection.<module:ol/Feature>} Features collection.\n * @api\n */\nSelect.prototype.getFeatures = function() {\n return this.featureOverlay_.getSource().getFeaturesCollection();\n};\n\n\n/**\n * Returns the Hit-detection tolerance.\n * @returns {number} Hit tolerance in pixels.\n * @api\n */\nSelect.prototype.getHitTolerance = function() {\n return this.hitTolerance_;\n};\n\n\n/**\n * Returns the associated {@link module:ol/layer/Vector~Vector vectorlayer} of\n * the (last) selected feature. Note that this will not work with any\n * programmatic method like pushing features to\n * {@link module:ol/interaction/Select~Select#getFeatures collection}.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature\n * @return {module:ol/layer/Vector} Layer.\n * @api\n */\nSelect.prototype.getLayer = function(feature) {\n const key = getUid(feature);\n return (\n /** @type {module:ol/layer/Vector} */ (this.featureLayerAssociation_[key])\n );\n};\n\n\n/**\n * Handles the {@link module:ol/MapBrowserEvent map browser event} and may change the\n * selected state of features.\n * @param {module:ol/MapBrowserEvent} mapBrowserEvent Map browser event.\n * @return {boolean} `false` to stop event propagation.\n * @this {module:ol/interaction/Select}\n */\nfunction handleEvent(mapBrowserEvent) {\n if (!this.condition_(mapBrowserEvent)) {\n return true;\n }\n const add = this.addCondition_(mapBrowserEvent);\n const remove = this.removeCondition_(mapBrowserEvent);\n const toggle = this.toggleCondition_(mapBrowserEvent);\n const set = !add && !remove && !toggle;\n const map = mapBrowserEvent.map;\n const features = this.featureOverlay_.getSource().getFeaturesCollection();\n const deselected = [];\n const selected = [];\n if (set) {\n // Replace the currently selected feature(s) with the feature(s) at the\n // pixel, or clear the selected feature(s) if there is no feature at\n // the pixel.\n clear(this.featureLayerAssociation_);\n map.forEachFeatureAtPixel(mapBrowserEvent.pixel,\n (\n /**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @param {module:ol/layer/Layer} layer Layer.\n * @return {boolean|undefined} Continue to iterate over the features.\n */\n function(feature, layer) {\n if (this.filter_(feature, layer)) {\n selected.push(feature);\n this.addFeatureLayerAssociation_(feature, layer);\n return !this.multi_;\n }\n }).bind(this), {\n layerFilter: this.layerFilter_,\n hitTolerance: this.hitTolerance_\n });\n for (let i = features.getLength() - 1; i >= 0; --i) {\n const feature = features.item(i);\n const index = selected.indexOf(feature);\n if (index > -1) {\n // feature is already selected\n selected.splice(index, 1);\n } else {\n features.remove(feature);\n deselected.push(feature);\n }\n }\n if (selected.length !== 0) {\n features.extend(selected);\n }\n } else {\n // Modify the currently selected feature(s).\n map.forEachFeatureAtPixel(mapBrowserEvent.pixel,\n (\n /**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @param {module:ol/layer/Layer} layer Layer.\n * @return {boolean|undefined} Continue to iterate over the features.\n */\n function(feature, layer) {\n if (this.filter_(feature, layer)) {\n if ((add || toggle) && !includes(features.getArray(), feature)) {\n selected.push(feature);\n this.addFeatureLayerAssociation_(feature, layer);\n } else if ((remove || toggle) && includes(features.getArray(), feature)) {\n deselected.push(feature);\n this.removeFeatureLayerAssociation_(feature);\n }\n return !this.multi_;\n }\n }).bind(this), {\n layerFilter: this.layerFilter_,\n hitTolerance: this.hitTolerance_\n });\n for (let j = deselected.length - 1; j >= 0; --j) {\n features.remove(deselected[j]);\n }\n features.extend(selected);\n }\n if (selected.length > 0 || deselected.length > 0) {\n this.dispatchEvent(\n new SelectEvent(SelectEventType.SELECT,\n selected, deselected, mapBrowserEvent));\n }\n return pointerMove(mapBrowserEvent);\n}\n\n\n/**\n * Hit-detection tolerance. Pixels inside the radius around the given position\n * will be checked for features. This only works for the canvas renderer and\n * not for WebGL.\n * @param {number} hitTolerance Hit tolerance in pixels.\n * @api\n */\nSelect.prototype.setHitTolerance = function(hitTolerance) {\n this.hitTolerance_ = hitTolerance;\n};\n\n\n/**\n * Remove the interaction from its current map, if any, and attach it to a new\n * map, if any. Pass `null` to just remove the interaction from the current map.\n * @param {module:ol/PluggableMap} map Map.\n * @override\n * @api\n */\nSelect.prototype.setMap = function(map) {\n const currentMap = this.getMap();\n const selectedFeatures =\n this.featureOverlay_.getSource().getFeaturesCollection();\n if (currentMap) {\n selectedFeatures.forEach(currentMap.unskipFeature.bind(currentMap));\n }\n Interaction.prototype.setMap.call(this, map);\n this.featureOverlay_.setMap(map);\n if (map) {\n selectedFeatures.forEach(map.skipFeature.bind(map));\n }\n};\n\n\n/**\n * @return {module:ol/style/Style~StyleFunction} Styles.\n */\nfunction getDefaultStyleFunction() {\n const styles = createEditingStyle();\n extend(styles[GeometryType.POLYGON], styles[GeometryType.LINE_STRING]);\n extend(styles[GeometryType.GEOMETRY_COLLECTION], styles[GeometryType.LINE_STRING]);\n\n return function(feature, resolution) {\n if (!feature.getGeometry()) {\n return null;\n }\n return styles[feature.getGeometry().getType()];\n };\n}\n\n\n/**\n * @param {module:ol/Collection~CollectionEvent} evt Event.\n * @private\n */\nSelect.prototype.addFeature_ = function(evt) {\n const map = this.getMap();\n if (map) {\n map.skipFeature(/** @type {module:ol/Feature} */ (evt.element));\n }\n};\n\n\n/**\n * @param {module:ol/Collection~CollectionEvent} evt Event.\n * @private\n */\nSelect.prototype.removeFeature_ = function(evt) {\n const map = this.getMap();\n if (map) {\n map.unskipFeature(/** @type {module:ol/Feature} */ (evt.element));\n }\n};\n\n\n/**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @private\n */\nSelect.prototype.removeFeatureLayerAssociation_ = function(feature) {\n const key = getUid(feature);\n delete this.featureLayerAssociation_[key];\n};\n\n\nexport default Select;\n","/**\n * @module ol/interaction/Snap\n */\nimport {getUid, inherits} from '../util.js';\nimport {CollectionEvent} from '../Collection.js';\nimport CollectionEventType from '../CollectionEventType.js';\nimport {distance as coordinateDistance, squaredDistance as squaredCoordinateDistance, closestOnCircle, closestOnSegment, squaredDistanceToSegment} from '../coordinate.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {boundingExtent, createEmpty} from '../extent.js';\nimport {TRUE, FALSE} from '../functions.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport {fromCircle} from '../geom/Polygon.js';\nimport PointerInteraction, {handleEvent as handlePointerEvent} from '../interaction/Pointer.js';\nimport {getValues} from '../obj.js';\nimport {VectorSourceEvent} from '../source/Vector.js';\nimport VectorEventType from '../source/VectorEventType.js';\nimport RBush from '../structs/RBush.js';\n\n\n/**\n * @typedef {Object} Result\n * @property {boolean} snapped\n * @property {module:ol/coordinate~Coordinate|null} vertex\n * @property {module:ol~Pixel|null} vertexPixel\n */\n\n\n/**\n * @typedef {Object} SegmentData\n * @property {module:ol/Feature} feature\n * @property {Array.<module:ol/coordinate~Coordinate>} segment\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/Collection.<module:ol/Feature>} [features] Snap to these features. Either this option or source should be provided.\n * @property {boolean} [edge=true] Snap to edges.\n * @property {boolean} [vertex=true] Snap to vertices.\n * @property {number} [pixelTolerance=10] Pixel tolerance for considering the pointer close enough to a segment or\n * vertex for snapping.\n * @property {module:ol/source/Vector} [source] Snap to features from this source. Either this option or features should be provided\n */\n\n\n/**\n * @classdesc\n * Handles snapping of vector features while modifying or drawing them. The\n * features can come from a {@link module:ol/source/Vector} or {@link module:ol/Collection~Collection}\n * Any interaction object that allows the user to interact\n * with the features using the mouse can benefit from the snapping, as long\n * as it is added before.\n *\n * The snap interaction modifies map browser event `coordinate` and `pixel`\n * properties to force the snap to occur to any interaction that them.\n *\n * Example:\n *\n * import Snap from 'ol/interaction/Snap';\n *\n * var snap = new Snap({\n * source: source\n * });\n *\n * @constructor\n * @extends {module:ol/interaction/Pointer}\n * @param {module:ol/interaction/Snap~Options=} opt_options Options.\n * @api\n */\nconst Snap = function(opt_options) {\n\n PointerInteraction.call(this, {\n handleEvent: handleEvent,\n handleDownEvent: TRUE,\n handleUpEvent: handleUpEvent\n });\n\n const options = opt_options ? opt_options : {};\n\n /**\n * @type {module:ol/source/Vector}\n * @private\n */\n this.source_ = options.source ? options.source : null;\n\n /**\n * @private\n * @type {boolean}\n */\n this.vertex_ = options.vertex !== undefined ? options.vertex : true;\n\n /**\n * @private\n * @type {boolean}\n */\n this.edge_ = options.edge !== undefined ? options.edge : true;\n\n /**\n * @type {module:ol/Collection.<module:ol/Feature>}\n * @private\n */\n this.features_ = options.features ? options.features : null;\n\n /**\n * @type {Array.<module:ol/events~EventsKey>}\n * @private\n */\n this.featuresListenerKeys_ = [];\n\n /**\n * @type {Object.<number, module:ol/events~EventsKey>}\n * @private\n */\n this.featureChangeListenerKeys_ = {};\n\n /**\n * Extents are preserved so indexed segment can be quickly removed\n * when its feature geometry changes\n * @type {Object.<number, module:ol/extent~Extent>}\n * @private\n */\n this.indexedFeaturesExtents_ = {};\n\n /**\n * If a feature geometry changes while a pointer drag|move event occurs, the\n * feature doesn't get updated right away. It will be at the next 'pointerup'\n * event fired.\n * @type {!Object.<number, module:ol/Feature>}\n * @private\n */\n this.pendingFeatures_ = {};\n\n /**\n * Used for distance sorting in sortByDistance_\n * @type {module:ol/coordinate~Coordinate}\n * @private\n */\n this.pixelCoordinate_ = null;\n\n /**\n * @type {number}\n * @private\n */\n this.pixelTolerance_ = options.pixelTolerance !== undefined ?\n options.pixelTolerance : 10;\n\n /**\n * @type {function(module:ol/interaction/Snap~SegmentData, module:ol/interaction/Snap~SegmentData): number}\n * @private\n */\n this.sortByDistance_ = sortByDistance.bind(this);\n\n\n /**\n * Segment RTree for each layer\n * @type {module:ol/structs/RBush.<module:ol/interaction/Snap~SegmentData>}\n * @private\n */\n this.rBush_ = new RBush();\n\n\n /**\n * @const\n * @private\n * @type {Object.<string, function(module:ol/Feature, module:ol/geom/Geometry)>}\n */\n this.SEGMENT_WRITERS_ = {\n 'Point': this.writePointGeometry_,\n 'LineString': this.writeLineStringGeometry_,\n 'LinearRing': this.writeLineStringGeometry_,\n 'Polygon': this.writePolygonGeometry_,\n 'MultiPoint': this.writeMultiPointGeometry_,\n 'MultiLineString': this.writeMultiLineStringGeometry_,\n 'MultiPolygon': this.writeMultiPolygonGeometry_,\n 'GeometryCollection': this.writeGeometryCollectionGeometry_,\n 'Circle': this.writeCircleGeometry_\n };\n};\n\ninherits(Snap, PointerInteraction);\n\n\n/**\n * Add a feature to the collection of features that we may snap to.\n * @param {module:ol/Feature} feature Feature.\n * @param {boolean=} opt_listen Whether to listen to the feature change or not\n * Defaults to `true`.\n * @api\n */\nSnap.prototype.addFeature = function(feature, opt_listen) {\n const register = opt_listen !== undefined ? opt_listen : true;\n const feature_uid = getUid(feature);\n const geometry = feature.getGeometry();\n if (geometry) {\n const segmentWriter = this.SEGMENT_WRITERS_[geometry.getType()];\n if (segmentWriter) {\n this.indexedFeaturesExtents_[feature_uid] = geometry.getExtent(createEmpty());\n segmentWriter.call(this, feature, geometry);\n }\n }\n\n if (register) {\n this.featureChangeListenerKeys_[feature_uid] = listen(\n feature,\n EventType.CHANGE,\n this.handleFeatureChange_, this);\n }\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature.\n * @private\n */\nSnap.prototype.forEachFeatureAdd_ = function(feature) {\n this.addFeature(feature);\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature.\n * @private\n */\nSnap.prototype.forEachFeatureRemove_ = function(feature) {\n this.removeFeature(feature);\n};\n\n\n/**\n * @return {module:ol/Collection.<module:ol/Feature>|Array.<module:ol/Feature>} Features.\n * @private\n */\nSnap.prototype.getFeatures_ = function() {\n let features;\n if (this.features_) {\n features = this.features_;\n } else if (this.source_) {\n features = this.source_.getFeatures();\n }\n return (\n /** @type {!Array.<module:ol/Feature>|!module:ol/Collection.<module:ol/Feature>} */ (features)\n );\n};\n\n\n/**\n * @param {module:ol/source/Vector|module:ol/Collection~CollectionEvent} evt Event.\n * @private\n */\nSnap.prototype.handleFeatureAdd_ = function(evt) {\n let feature;\n if (evt instanceof VectorSourceEvent) {\n feature = evt.feature;\n } else if (evt instanceof CollectionEvent) {\n feature = evt.element;\n }\n this.addFeature(/** @type {module:ol/Feature} */ (feature));\n};\n\n\n/**\n * @param {module:ol/source/Vector|module:ol/Collection~CollectionEvent} evt Event.\n * @private\n */\nSnap.prototype.handleFeatureRemove_ = function(evt) {\n let feature;\n if (evt instanceof VectorSourceEvent) {\n feature = evt.feature;\n } else if (evt instanceof CollectionEvent) {\n feature = evt.element;\n }\n this.removeFeature(/** @type {module:ol/Feature} */ (feature));\n};\n\n\n/**\n * @param {module:ol/events/Event} evt Event.\n * @private\n */\nSnap.prototype.handleFeatureChange_ = function(evt) {\n const feature = /** @type {module:ol/Feature} */ (evt.target);\n if (this.handlingDownUpSequence) {\n const uid = getUid(feature);\n if (!(uid in this.pendingFeatures_)) {\n this.pendingFeatures_[uid] = feature;\n }\n } else {\n this.updateFeature_(feature);\n }\n};\n\n\n/**\n * Remove a feature from the collection of features that we may snap to.\n * @param {module:ol/Feature} feature Feature\n * @param {boolean=} opt_unlisten Whether to unlisten to the feature change\n * or not. Defaults to `true`.\n * @api\n */\nSnap.prototype.removeFeature = function(feature, opt_unlisten) {\n const unregister = opt_unlisten !== undefined ? opt_unlisten : true;\n const feature_uid = getUid(feature);\n const extent = this.indexedFeaturesExtents_[feature_uid];\n if (extent) {\n const rBush = this.rBush_;\n const nodesToRemove = [];\n rBush.forEachInExtent(extent, function(node) {\n if (feature === node.feature) {\n nodesToRemove.push(node);\n }\n });\n for (let i = nodesToRemove.length - 1; i >= 0; --i) {\n rBush.remove(nodesToRemove[i]);\n }\n }\n\n if (unregister) {\n unlistenByKey(this.featureChangeListenerKeys_[feature_uid]);\n delete this.featureChangeListenerKeys_[feature_uid];\n }\n};\n\n\n/**\n * @inheritDoc\n */\nSnap.prototype.setMap = function(map) {\n const currentMap = this.getMap();\n const keys = this.featuresListenerKeys_;\n const features = this.getFeatures_();\n\n if (currentMap) {\n keys.forEach(unlistenByKey);\n keys.length = 0;\n features.forEach(this.forEachFeatureRemove_.bind(this));\n }\n PointerInteraction.prototype.setMap.call(this, map);\n\n if (map) {\n if (this.features_) {\n keys.push(\n listen(this.features_, CollectionEventType.ADD,\n this.handleFeatureAdd_, this),\n listen(this.features_, CollectionEventType.REMOVE,\n this.handleFeatureRemove_, this)\n );\n } else if (this.source_) {\n keys.push(\n listen(this.source_, VectorEventType.ADDFEATURE,\n this.handleFeatureAdd_, this),\n listen(this.source_, VectorEventType.REMOVEFEATURE,\n this.handleFeatureRemove_, this)\n );\n }\n features.forEach(this.forEachFeatureAdd_.bind(this));\n }\n};\n\n\n/**\n * @inheritDoc\n */\nSnap.prototype.shouldStopEvent = FALSE;\n\n\n/**\n * @param {module:ol~Pixel} pixel Pixel\n * @param {module:ol/coordinate~Coordinate} pixelCoordinate Coordinate\n * @param {module:ol/PluggableMap} map Map.\n * @return {module:ol/interaction/Snap~Result} Snap result\n */\nSnap.prototype.snapTo = function(pixel, pixelCoordinate, map) {\n\n const lowerLeft = map.getCoordinateFromPixel(\n [pixel[0] - this.pixelTolerance_, pixel[1] + this.pixelTolerance_]);\n const upperRight = map.getCoordinateFromPixel(\n [pixel[0] + this.pixelTolerance_, pixel[1] - this.pixelTolerance_]);\n const box = boundingExtent([lowerLeft, upperRight]);\n\n let segments = this.rBush_.getInExtent(box);\n\n // If snapping on vertices only, don't consider circles\n if (this.vertex_ && !this.edge_) {\n segments = segments.filter(function(segment) {\n return segment.feature.getGeometry().getType() !==\n GeometryType.CIRCLE;\n });\n }\n\n let snappedToVertex = false;\n let snapped = false;\n let vertex = null;\n let vertexPixel = null;\n let dist, pixel1, pixel2, squaredDist1, squaredDist2;\n if (segments.length > 0) {\n this.pixelCoordinate_ = pixelCoordinate;\n segments.sort(this.sortByDistance_);\n const closestSegment = segments[0].segment;\n const isCircle = segments[0].feature.getGeometry().getType() ===\n GeometryType.CIRCLE;\n if (this.vertex_ && !this.edge_) {\n pixel1 = map.getPixelFromCoordinate(closestSegment[0]);\n pixel2 = map.getPixelFromCoordinate(closestSegment[1]);\n squaredDist1 = squaredCoordinateDistance(pixel, pixel1);\n squaredDist2 = squaredCoordinateDistance(pixel, pixel2);\n dist = Math.sqrt(Math.min(squaredDist1, squaredDist2));\n snappedToVertex = dist <= this.pixelTolerance_;\n if (snappedToVertex) {\n snapped = true;\n vertex = squaredDist1 > squaredDist2 ? closestSegment[1] : closestSegment[0];\n vertexPixel = map.getPixelFromCoordinate(vertex);\n }\n } else if (this.edge_) {\n if (isCircle) {\n vertex = closestOnCircle(pixelCoordinate,\n /** @type {module:ol/geom/Circle} */ (segments[0].feature.getGeometry()));\n } else {\n vertex = closestOnSegment(pixelCoordinate, closestSegment);\n }\n vertexPixel = map.getPixelFromCoordinate(vertex);\n if (coordinateDistance(pixel, vertexPixel) <= this.pixelTolerance_) {\n snapped = true;\n if (this.vertex_ && !isCircle) {\n pixel1 = map.getPixelFromCoordinate(closestSegment[0]);\n pixel2 = map.getPixelFromCoordinate(closestSegment[1]);\n squaredDist1 = squaredCoordinateDistance(vertexPixel, pixel1);\n squaredDist2 = squaredCoordinateDistance(vertexPixel, pixel2);\n dist = Math.sqrt(Math.min(squaredDist1, squaredDist2));\n snappedToVertex = dist <= this.pixelTolerance_;\n if (snappedToVertex) {\n vertex = squaredDist1 > squaredDist2 ? closestSegment[1] : closestSegment[0];\n vertexPixel = map.getPixelFromCoordinate(vertex);\n }\n }\n }\n }\n if (snapped) {\n vertexPixel = [Math.round(vertexPixel[0]), Math.round(vertexPixel[1])];\n }\n }\n return (\n /** @type {module:ol/interaction/Snap~Result} */ ({\n snapped: snapped,\n vertex: vertex,\n vertexPixel: vertexPixel\n })\n );\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @private\n */\nSnap.prototype.updateFeature_ = function(feature) {\n this.removeFeature(feature, false);\n this.addFeature(feature, false);\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/Circle} geometry Geometry.\n * @private\n */\nSnap.prototype.writeCircleGeometry_ = function(feature, geometry) {\n const polygon = fromCircle(geometry);\n const coordinates = polygon.getCoordinates()[0];\n for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n const segment = coordinates.slice(i, i + 2);\n const segmentData = /** @type {module:ol/interaction/Snap~SegmentData} */ ({\n feature: feature,\n segment: segment\n });\n this.rBush_.insert(boundingExtent(segment), segmentData);\n }\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/GeometryCollection} geometry Geometry.\n * @private\n */\nSnap.prototype.writeGeometryCollectionGeometry_ = function(feature, geometry) {\n const geometries = geometry.getGeometriesArray();\n for (let i = 0; i < geometries.length; ++i) {\n const segmentWriter = this.SEGMENT_WRITERS_[geometries[i].getType()];\n if (segmentWriter) {\n segmentWriter.call(this, feature, geometries[i]);\n }\n }\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/LineString} geometry Geometry.\n * @private\n */\nSnap.prototype.writeLineStringGeometry_ = function(feature, geometry) {\n const coordinates = geometry.getCoordinates();\n for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n const segment = coordinates.slice(i, i + 2);\n const segmentData = /** @type {module:ol/interaction/Snap~SegmentData} */ ({\n feature: feature,\n segment: segment\n });\n this.rBush_.insert(boundingExtent(segment), segmentData);\n }\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/MultiLineString} geometry Geometry.\n * @private\n */\nSnap.prototype.writeMultiLineStringGeometry_ = function(feature, geometry) {\n const lines = geometry.getCoordinates();\n for (let j = 0, jj = lines.length; j < jj; ++j) {\n const coordinates = lines[j];\n for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n const segment = coordinates.slice(i, i + 2);\n const segmentData = /** @type {module:ol/interaction/Snap~SegmentData} */ ({\n feature: feature,\n segment: segment\n });\n this.rBush_.insert(boundingExtent(segment), segmentData);\n }\n }\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/MultiPoint} geometry Geometry.\n * @private\n */\nSnap.prototype.writeMultiPointGeometry_ = function(feature, geometry) {\n const points = geometry.getCoordinates();\n for (let i = 0, ii = points.length; i < ii; ++i) {\n const coordinates = points[i];\n const segmentData = /** @type {module:ol/interaction/Snap~SegmentData} */ ({\n feature: feature,\n segment: [coordinates, coordinates]\n });\n this.rBush_.insert(geometry.getExtent(), segmentData);\n }\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/MultiPolygon} geometry Geometry.\n * @private\n */\nSnap.prototype.writeMultiPolygonGeometry_ = function(feature, geometry) {\n const polygons = geometry.getCoordinates();\n for (let k = 0, kk = polygons.length; k < kk; ++k) {\n const rings = polygons[k];\n for (let j = 0, jj = rings.length; j < jj; ++j) {\n const coordinates = rings[j];\n for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n const segment = coordinates.slice(i, i + 2);\n const segmentData = /** @type {module:ol/interaction/Snap~SegmentData} */ ({\n feature: feature,\n segment: segment\n });\n this.rBush_.insert(boundingExtent(segment), segmentData);\n }\n }\n }\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/Point} geometry Geometry.\n * @private\n */\nSnap.prototype.writePointGeometry_ = function(feature, geometry) {\n const coordinates = geometry.getCoordinates();\n const segmentData = /** @type {module:ol/interaction/Snap~SegmentData} */ ({\n feature: feature,\n segment: [coordinates, coordinates]\n });\n this.rBush_.insert(geometry.getExtent(), segmentData);\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature\n * @param {module:ol/geom/Polygon} geometry Geometry.\n * @private\n */\nSnap.prototype.writePolygonGeometry_ = function(feature, geometry) {\n const rings = geometry.getCoordinates();\n for (let j = 0, jj = rings.length; j < jj; ++j) {\n const coordinates = rings[j];\n for (let i = 0, ii = coordinates.length - 1; i < ii; ++i) {\n const segment = coordinates.slice(i, i + 2);\n const segmentData = /** @type {module:ol/interaction/Snap~SegmentData} */ ({\n feature: feature,\n segment: segment\n });\n this.rBush_.insert(boundingExtent(segment), segmentData);\n }\n }\n};\n\n\n/**\n * Handle all pointer events events.\n * @param {module:ol/MapBrowserEvent} evt A move event.\n * @return {boolean} Pass the event to other interactions.\n * @this {module:ol/interaction/Snap}\n */\nexport function handleEvent(evt) {\n const result = this.snapTo(evt.pixel, evt.coordinate, evt.map);\n if (result.snapped) {\n evt.coordinate = result.vertex.slice(0, 2);\n evt.pixel = result.vertexPixel;\n }\n return handlePointerEvent.call(this, evt);\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} evt Event.\n * @return {boolean} Stop drag sequence?\n * @this {module:ol/interaction/Snap}\n */\nfunction handleUpEvent(evt) {\n const featuresToUpdate = getValues(this.pendingFeatures_);\n if (featuresToUpdate.length) {\n featuresToUpdate.forEach(this.updateFeature_.bind(this));\n this.pendingFeatures_ = {};\n }\n return false;\n}\n\n\n/**\n * Sort segments by distance, helper function\n * @param {module:ol/interaction/Snap~SegmentData} a The first segment data.\n * @param {module:ol/interaction/Snap~SegmentData} b The second segment data.\n * @return {number} The difference in distance.\n * @this {module:ol/interaction/Snap}\n */\nfunction sortByDistance(a, b) {\n const deltaA = squaredDistanceToSegment(this.pixelCoordinate_, a.segment);\n const deltaB = squaredDistanceToSegment(this.pixelCoordinate_, b.segment);\n return deltaA - deltaB;\n}\n\nexport default Snap;\n","/**\n * @module ol/interaction/Translate\n */\nimport {inherits} from '../util.js';\nimport Collection from '../Collection.js';\nimport {getChangeEventType} from '../Object.js';\nimport {listen} from '../events.js';\nimport Event from '../events/Event.js';\nimport {TRUE} from '../functions.js';\nimport {includes} from '../array.js';\nimport PointerInteraction from '../interaction/Pointer.js';\nimport InteractionProperty from '../interaction/Property.js';\n\n\n/**\n * @enum {string}\n */\nconst TranslateEventType = {\n /**\n * Triggered upon feature translation start.\n * @event TranslateEvent#translatestart\n * @api\n */\n TRANSLATESTART: 'translatestart',\n /**\n * Triggered upon feature translation.\n * @event TranslateEvent#translating\n * @api\n */\n TRANSLATING: 'translating',\n /**\n * Triggered upon feature translation end.\n * @event TranslateEvent#translateend\n * @api\n */\n TRANSLATEEND: 'translateend'\n};\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/Collection.<module:ol/Feature>} [features] Only features contained in this collection will be able to be translated. If\n * not specified, all features on the map will be able to be translated.\n * @property {Array.<module:ol/layer/Layer>|function(module:ol/layer/Layer): boolean} [layers] A list of layers from which features should be\n * translated. Alternatively, a filter function can be provided. The\n * function will be called for each layer in the map and should return\n * `true` for layers that you want to be translatable. If the option is\n * absent, all visible layers will be considered translatable.\n * @property {number} [hitTolerance=0] Hit-detection tolerance. Pixels inside the radius around the given position\n * will be checked for features. This only works for the canvas renderer and\n * not for WebGL.\n */\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/interaction/Translate~Translate} instances\n * are instances of this type.\n *\n * @constructor\n * @extends {module:ol/events/Event}\n * @param {module:ol/interaction/Translate~TranslateEventType} type Type.\n * @param {module:ol/Collection.<module:ol/Feature>} features The features translated.\n * @param {module:ol/coordinate~Coordinate} coordinate The event coordinate.\n */\nexport const TranslateEvent = function(type, features, coordinate) {\n\n Event.call(this, type);\n\n /**\n * The features being translated.\n * @type {module:ol/Collection.<module:ol/Feature>}\n * @api\n */\n this.features = features;\n\n /**\n * The coordinate of the drag event.\n * @const\n * @type {module:ol/coordinate~Coordinate}\n * @api\n */\n this.coordinate = coordinate;\n};\n\ninherits(TranslateEvent, Event);\n\n\n/**\n * @classdesc\n * Interaction for translating (moving) features.\n *\n * @constructor\n * @extends {module:ol/interaction/Pointer}\n * @fires module:ol/interaction/Translate~TranslateEvent\n * @param {module:ol/interaction/Translate~Options=} opt_options Options.\n * @api\n */\nconst Translate = function(opt_options) {\n PointerInteraction.call(this, {\n handleDownEvent: handleDownEvent,\n handleDragEvent: handleDragEvent,\n handleMoveEvent: handleMoveEvent,\n handleUpEvent: handleUpEvent\n });\n\n const options = opt_options ? opt_options : {};\n\n /**\n * The last position we translated to.\n * @type {module:ol/coordinate~Coordinate}\n * @private\n */\n this.lastCoordinate_ = null;\n\n\n /**\n * @type {module:ol/Collection.<module:ol/Feature>}\n * @private\n */\n this.features_ = options.features !== undefined ? options.features : null;\n\n /** @type {function(module:ol/layer/Layer): boolean} */\n let layerFilter;\n if (options.layers) {\n if (typeof options.layers === 'function') {\n layerFilter = options.layers;\n } else {\n const layers = options.layers;\n layerFilter = function(layer) {\n return includes(layers, layer);\n };\n }\n } else {\n layerFilter = TRUE;\n }\n\n /**\n * @private\n * @type {function(module:ol/layer/Layer): boolean}\n */\n this.layerFilter_ = layerFilter;\n\n /**\n * @private\n * @type {number}\n */\n this.hitTolerance_ = options.hitTolerance ? options.hitTolerance : 0;\n\n /**\n * @type {module:ol/Feature}\n * @private\n */\n this.lastFeature_ = null;\n\n listen(this,\n getChangeEventType(InteractionProperty.ACTIVE),\n this.handleActiveChanged_, this);\n\n};\n\ninherits(Translate, PointerInteraction);\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} event Event.\n * @return {boolean} Start drag sequence?\n * @this {module:ol/interaction/Translate}\n */\nfunction handleDownEvent(event) {\n this.lastFeature_ = this.featuresAtPixel_(event.pixel, event.map);\n if (!this.lastCoordinate_ && this.lastFeature_) {\n this.lastCoordinate_ = event.coordinate;\n handleMoveEvent.call(this, event);\n\n const features = this.features_ || new Collection([this.lastFeature_]);\n\n this.dispatchEvent(\n new TranslateEvent(\n TranslateEventType.TRANSLATESTART, features,\n event.coordinate));\n return true;\n }\n return false;\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} event Event.\n * @return {boolean} Stop drag sequence?\n * @this {module:ol/interaction/Translate}\n */\nfunction handleUpEvent(event) {\n if (this.lastCoordinate_) {\n this.lastCoordinate_ = null;\n handleMoveEvent.call(this, event);\n\n const features = this.features_ || new Collection([this.lastFeature_]);\n\n this.dispatchEvent(\n new TranslateEvent(\n TranslateEventType.TRANSLATEEND, features,\n event.coordinate));\n return true;\n }\n return false;\n}\n\n\n/**\n * @param {module:ol/MapBrowserPointerEvent} event Event.\n * @this {module:ol/interaction/Translate}\n */\nfunction handleDragEvent(event) {\n if (this.lastCoordinate_) {\n const newCoordinate = event.coordinate;\n const deltaX = newCoordinate[0] - this.lastCoordinate_[0];\n const deltaY = newCoordinate[1] - this.lastCoordinate_[1];\n\n const features = this.features_ || new Collection([this.lastFeature_]);\n\n features.forEach(function(feature) {\n const geom = feature.getGeometry();\n geom.translate(deltaX, deltaY);\n feature.setGeometry(geom);\n });\n\n this.lastCoordinate_ = newCoordinate;\n this.dispatchEvent(\n new TranslateEvent(\n TranslateEventType.TRANSLATING, features,\n newCoordinate));\n }\n}\n\n\n/**\n * @param {module:ol/MapBrowserEvent} event Event.\n * @this {module:ol/interaction/Translate}\n */\nfunction handleMoveEvent(event) {\n const elem = event.map.getViewport();\n\n // Change the cursor to grab/grabbing if hovering any of the features managed\n // by the interaction\n if (this.featuresAtPixel_(event.pixel, event.map)) {\n elem.classList.remove(this.lastCoordinate_ ? 'ol-grab' : 'ol-grabbing');\n elem.classList.add(this.lastCoordinate_ ? 'ol-grabbing' : 'ol-grab');\n } else {\n elem.classList.remove('ol-grab', 'ol-grabbing');\n }\n}\n\n\n/**\n * Tests to see if the given coordinates intersects any of our selected\n * features.\n * @param {module:ol~Pixel} pixel Pixel coordinate to test for intersection.\n * @param {module:ol/PluggableMap} map Map to test the intersection on.\n * @return {module:ol/Feature} Returns the feature found at the specified pixel\n * coordinates.\n * @private\n */\nTranslate.prototype.featuresAtPixel_ = function(pixel, map) {\n return map.forEachFeatureAtPixel(pixel,\n function(feature) {\n if (!this.features_ || includes(this.features_.getArray(), feature)) {\n return feature;\n }\n }.bind(this), {\n layerFilter: this.layerFilter_,\n hitTolerance: this.hitTolerance_\n });\n};\n\n\n/**\n * Returns the Hit-detection tolerance.\n * @returns {number} Hit tolerance in pixels.\n * @api\n */\nTranslate.prototype.getHitTolerance = function() {\n return this.hitTolerance_;\n};\n\n\n/**\n * Hit-detection tolerance. Pixels inside the radius around the given position\n * will be checked for features. This only works for the canvas renderer and\n * not for WebGL.\n * @param {number} hitTolerance Hit tolerance in pixels.\n * @api\n */\nTranslate.prototype.setHitTolerance = function(hitTolerance) {\n this.hitTolerance_ = hitTolerance;\n};\n\n\n/**\n * @inheritDoc\n */\nTranslate.prototype.setMap = function(map) {\n const oldMap = this.getMap();\n PointerInteraction.prototype.setMap.call(this, map);\n this.updateState_(oldMap);\n};\n\n\n/**\n * @private\n */\nTranslate.prototype.handleActiveChanged_ = function() {\n this.updateState_(null);\n};\n\n\n/**\n * @param {module:ol/PluggableMap} oldMap Old map.\n * @private\n */\nTranslate.prototype.updateState_ = function(oldMap) {\n let map = this.getMap();\n const active = this.getActive();\n if (!map || !active) {\n map = map || oldMap;\n if (map) {\n const elem = map.getViewport();\n elem.classList.remove('ol-grab', 'ol-grabbing');\n }\n }\n};\n\n\nexport default Translate;\n","/**\n * @module ol/interaction\n */\nimport Collection from './Collection.js';\nimport Kinetic from './Kinetic.js';\nimport DoubleClickZoom from './interaction/DoubleClickZoom.js';\nimport DragPan from './interaction/DragPan.js';\nimport DragRotate from './interaction/DragRotate.js';\nimport DragZoom from './interaction/DragZoom.js';\nimport KeyboardPan from './interaction/KeyboardPan.js';\nimport KeyboardZoom from './interaction/KeyboardZoom.js';\nimport MouseWheelZoom from './interaction/MouseWheelZoom.js';\nimport PinchRotate from './interaction/PinchRotate.js';\nimport PinchZoom from './interaction/PinchZoom.js';\n\nexport {default as DoubleClickZoom} from './interaction/DoubleClickZoom.js';\nexport {default as DragAndDrop} from './interaction/DragAndDrop.js';\nexport {default as DragBox} from './interaction/DragBox.js';\nexport {default as DragPan} from './interaction/DragPan.js';\nexport {default as DragRotate} from './interaction/DragRotate.js';\nexport {default as DragRotateAndZoom} from './interaction/DragRotateAndZoom.js';\nexport {default as DragZoom} from './interaction/DragZoom.js';\nexport {default as Draw} from './interaction/Draw.js';\nexport {default as Extent} from './interaction/Extent.js';\nexport {default as Interaction} from './interaction/Interaction.js';\nexport {default as KeyboardPan} from './interaction/KeyboardPan.js';\nexport {default as KeyboardZoom} from './interaction/KeyboardZoom.js';\nexport {default as Modify} from './interaction/Modify.js';\nexport {default as MouseWheelZoom} from './interaction/MouseWheelZoom.js';\nexport {default as PinchRotate} from './interaction/PinchRotate.js';\nexport {default as PinchZoom} from './interaction/PinchZoom.js';\nexport {default as Pointer} from './interaction/Pointer.js';\nexport {default as Select} from './interaction/Select.js';\nexport {default as Snap} from './interaction/Snap.js';\nexport {default as Translate} from './interaction/Translate.js';\n\n\n/**\n * @typedef {Object} DefaultsOptions\n * @property {boolean} [altShiftDragRotate=true] Whether Alt-Shift-drag rotate is\n * desired.\n * @property {boolean} [constrainResolution=false] Zoom to the closest integer\n * zoom level after the wheel/trackpad or pinch gesture ends.\n * @property {boolean} [doubleClickZoom=true] Whether double click zoom is\n * desired.\n * @property {boolean} [keyboard=true] Whether keyboard interaction is desired.\n * @property {boolean} [mouseWheelZoom=true] Whether mousewheel zoom is desired.\n * @property {boolean} [shiftDragZoom=true] Whether Shift-drag zoom is desired.\n * @property {boolean} [dragPan=true] Whether drag pan is desired.\n * @property {boolean} [pinchRotate=true] Whether pinch rotate is desired.\n * @property {boolean} [pinchZoom=true] Whether pinch zoom is desired.\n * @property {number} [zoomDelta] Zoom level delta when using keyboard or\n * mousewheel zoom.\n * @property {number} [zoomDuration] Duration of the zoom animation in\n * milliseconds.\n */\n\n\n/**\n * Set of interactions included in maps by default. Specific interactions can be\n * excluded by setting the appropriate option to false in the constructor\n * options, but the order of the interactions is fixed. If you want to specify\n * a different order for interactions, you will need to create your own\n * {@link module:ol/interaction/Interaction} instances and insert\n * them into a {@link module:ol/Collection} in the order you want\n * before creating your {@link module:ol/Map~Map} instance. The default set of\n * interactions, in sequence, is:\n * * {@link module:ol/interaction/DragRotate~DragRotate}\n * * {@link module:ol/interaction/DoubleClickZoom~DoubleClickZoom}\n * * {@link module:ol/interaction/DragPan~DragPan}\n * * {@link module:ol/interaction/PinchRotate~PinchRotate}\n * * {@link module:ol/interaction/PinchZoom~PinchZoom}\n * * {@link module:ol/interaction/KeyboardPan~KeyboardPan}\n * * {@link module:ol/interaction/KeyboardZoom~KeyboardZoom}\n * * {@link module:ol/interaction/MouseWheelZoom~MouseWheelZoom}\n * * {@link module:ol/interaction/DragZoom~DragZoom}\n *\n * @param {module:ol/interaction/Interaction~DefaultsOptions=} opt_options\n * Defaults options.\n * @return {module:ol/Collection.<module:ol/interaction/Interaction>}\n * A collection of interactions to be used with the {@link module:ol/Map~Map}\n * constructor's `interactions` option.\n * @api\n */\nexport function defaults(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n const interactions = new Collection();\n\n const kinetic = new Kinetic(-0.005, 0.05, 100);\n\n const altShiftDragRotate = options.altShiftDragRotate !== undefined ?\n options.altShiftDragRotate : true;\n if (altShiftDragRotate) {\n interactions.push(new DragRotate());\n }\n\n const doubleClickZoom = options.doubleClickZoom !== undefined ?\n options.doubleClickZoom : true;\n if (doubleClickZoom) {\n interactions.push(new DoubleClickZoom({\n delta: options.zoomDelta,\n duration: options.zoomDuration\n }));\n }\n\n const dragPan = options.dragPan !== undefined ? options.dragPan : true;\n if (dragPan) {\n interactions.push(new DragPan({\n kinetic: kinetic\n }));\n }\n\n const pinchRotate = options.pinchRotate !== undefined ? options.pinchRotate :\n true;\n if (pinchRotate) {\n interactions.push(new PinchRotate());\n }\n\n const pinchZoom = options.pinchZoom !== undefined ? options.pinchZoom : true;\n if (pinchZoom) {\n interactions.push(new PinchZoom({\n constrainResolution: options.constrainResolution,\n duration: options.zoomDuration\n }));\n }\n\n const keyboard = options.keyboard !== undefined ? options.keyboard : true;\n if (keyboard) {\n interactions.push(new KeyboardPan());\n interactions.push(new KeyboardZoom({\n delta: options.zoomDelta,\n duration: options.zoomDuration\n }));\n }\n\n const mouseWheelZoom = options.mouseWheelZoom !== undefined ?\n options.mouseWheelZoom : true;\n if (mouseWheelZoom) {\n interactions.push(new MouseWheelZoom({\n constrainResolution: options.constrainResolution,\n duration: options.zoomDuration\n }));\n }\n\n const shiftDragZoom = options.shiftDragZoom !== undefined ?\n options.shiftDragZoom : true;\n if (shiftDragZoom) {\n interactions.push(new DragZoom({\n duration: options.zoomDuration\n }));\n }\n\n return interactions;\n\n}\n","/**\n * Default maximum allowed threshold (in pixels) for reprojection\n * triangulation.\n * @type {number}\n */\nexport const ERROR_THRESHOLD = 0.5;\n\n/**\n * Enable automatic reprojection of raster sources. Default is `true`.\n * TODO: decide if we want to expose this as a build flag or remove it\n * @type {boolean}\n */\nexport const ENABLE_RASTER_REPROJECTION = true;\n","/**\n * @module ol/ImageCanvas\n */\nimport {inherits} from './util.js';\nimport ImageBase from './ImageBase.js';\nimport ImageState from './ImageState.js';\n\n\n/**\n * A function that is called to trigger asynchronous canvas drawing. It is\n * called with a \"done\" callback that should be called when drawing is done.\n * If any error occurs during drawing, the \"done\" callback should be called with\n * that error.\n *\n * @typedef {function(function(Error))} Loader\n */\n\n\n/**\n * @constructor\n * @extends {module:ol/ImageBase}\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {HTMLCanvasElement} canvas Canvas.\n * @param {module:ol/ImageCanvas~Loader=} opt_loader Optional loader function to\n * support asynchronous canvas drawing.\n */\nconst ImageCanvas = function(extent, resolution, pixelRatio, canvas, opt_loader) {\n\n /**\n * Optional canvas loader function.\n * @type {?module:ol/ImageCanvas~Loader}\n * @private\n */\n this.loader_ = opt_loader !== undefined ? opt_loader : null;\n\n const state = opt_loader !== undefined ? ImageState.IDLE : ImageState.LOADED;\n\n ImageBase.call(this, extent, resolution, pixelRatio, state);\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = canvas;\n\n /**\n * @private\n * @type {Error}\n */\n this.error_ = null;\n\n};\n\ninherits(ImageCanvas, ImageBase);\n\n\n/**\n * Get any error associated with asynchronous rendering.\n * @return {Error} Any error that occurred during rendering.\n */\nImageCanvas.prototype.getError = function() {\n return this.error_;\n};\n\n\n/**\n * Handle async drawing complete.\n * @param {Error} err Any error during drawing.\n * @private\n */\nImageCanvas.prototype.handleLoad_ = function(err) {\n if (err) {\n this.error_ = err;\n this.state = ImageState.ERROR;\n } else {\n this.state = ImageState.LOADED;\n }\n this.changed();\n};\n\n\n/**\n * @inheritDoc\n */\nImageCanvas.prototype.load = function() {\n if (this.state == ImageState.IDLE) {\n this.state = ImageState.LOADING;\n this.changed();\n this.loader_(this.handleLoad_.bind(this));\n }\n};\n\n\n/**\n * @return {HTMLCanvasElement} Canvas element.\n */\nImageCanvas.prototype.getImage = function() {\n return this.canvas_;\n};\nexport default ImageCanvas;\n","/**\n * @module ol/render/Event\n */\nimport {inherits} from '../util.js';\nimport Event from '../events/Event.js';\n\n/**\n * @constructor\n * @extends {module:ol/events/Event}\n * @param {module:ol/render/EventType} type Type.\n * @param {module:ol/render/VectorContext=} opt_vectorContext Vector context.\n * @param {module:ol/PluggableMap~FrameState=} opt_frameState Frame state.\n * @param {?CanvasRenderingContext2D=} opt_context Context.\n * @param {?module:ol/webgl/Context=} opt_glContext WebGL Context.\n */\nconst RenderEvent = function(\n type, opt_vectorContext, opt_frameState, opt_context,\n opt_glContext) {\n\n Event.call(this, type);\n\n /**\n * For canvas, this is an instance of {@link module:ol/render/canvas/Immediate}.\n * @type {module:ol/render/VectorContext|undefined}\n * @api\n */\n this.vectorContext = opt_vectorContext;\n\n /**\n * An object representing the current render frame state.\n * @type {module:ol/PluggableMap~FrameState|undefined}\n * @api\n */\n this.frameState = opt_frameState;\n\n /**\n * Canvas context. Only available when a Canvas renderer is used, null\n * otherwise.\n * @type {CanvasRenderingContext2D|null|undefined}\n * @api\n */\n this.context = opt_context;\n\n /**\n * WebGL context. Only available when a WebGL renderer is used, null\n * otherwise.\n * @type {module:ol/webgl/Context|null|undefined}\n * @api\n */\n this.glContext = opt_glContext;\n\n};\n\ninherits(RenderEvent, Event);\nexport default RenderEvent;\n","/**\n * @module ol/render/VectorContext\n */\n/**\n * Context for drawing geometries. A vector context is available on render\n * events and does not need to be constructed directly.\n * @constructor\n * @abstract\n * @struct\n * @api\n */\nconst VectorContext = function() {\n};\n\n\n/**\n * Render a geometry with a custom renderer.\n *\n * @param {module:ol/geom/SimpleGeometry} geometry Geometry.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @param {Function} renderer Renderer.\n */\nVectorContext.prototype.drawCustom = function(geometry, feature, renderer) {};\n\n\n/**\n * Render a geometry.\n *\n * @param {module:ol/geom/Geometry} geometry The geometry to render.\n */\nVectorContext.prototype.drawGeometry = function(geometry) {};\n\n\n/**\n * Set the rendering style.\n *\n * @param {module:ol/style/Style} style The rendering style.\n */\nVectorContext.prototype.setStyle = function(style) {};\n\n\n/**\n * @param {module:ol/geom/Circle} circleGeometry Circle geometry.\n * @param {module:ol/Feature} feature Feature.\n */\nVectorContext.prototype.drawCircle = function(circleGeometry, feature) {};\n\n\n/**\n * @param {module:ol/Feature} feature Feature.\n * @param {module:ol/style/Style} style Style.\n */\nVectorContext.prototype.drawFeature = function(feature, style) {};\n\n\n/**\n * @param {module:ol/geom/GeometryCollection} geometryCollectionGeometry Geometry\n * collection.\n * @param {module:ol/Feature} feature Feature.\n */\nVectorContext.prototype.drawGeometryCollection = function(geometryCollectionGeometry, feature) {};\n\n\n/**\n * @param {module:ol/geom/LineString|module:ol/render/Feature} lineStringGeometry Line string geometry.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nVectorContext.prototype.drawLineString = function(lineStringGeometry, feature) {};\n\n\n/**\n * @param {module:ol/geom/MultiLineString|module:ol/render/Feature} multiLineStringGeometry MultiLineString geometry.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nVectorContext.prototype.drawMultiLineString = function(multiLineStringGeometry, feature) {};\n\n\n/**\n * @param {module:ol/geom/MultiPoint|module:ol/render/Feature} multiPointGeometry MultiPoint geometry.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nVectorContext.prototype.drawMultiPoint = function(multiPointGeometry, feature) {};\n\n\n/**\n * @param {module:ol/geom/MultiPolygon} multiPolygonGeometry MultiPolygon geometry.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nVectorContext.prototype.drawMultiPolygon = function(multiPolygonGeometry, feature) {};\n\n\n/**\n * @param {module:ol/geom/Point|module:ol/render/Feature} pointGeometry Point geometry.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nVectorContext.prototype.drawPoint = function(pointGeometry, feature) {};\n\n\n/**\n * @param {module:ol/geom/Polygon|module:ol/render/Feature} polygonGeometry Polygon geometry.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nVectorContext.prototype.drawPolygon = function(polygonGeometry, feature) {};\n\n\n/**\n * @param {module:ol/geom/Geometry|module:ol/render/Feature} geometry Geometry.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nVectorContext.prototype.drawText = function(geometry, feature) {};\n\n\n/**\n * @param {module:ol/style/Fill} fillStyle Fill style.\n * @param {module:ol/style/Stroke} strokeStyle Stroke style.\n */\nVectorContext.prototype.setFillStrokeStyle = function(fillStyle, strokeStyle) {};\n\n\n/**\n * @param {module:ol/style/Image} imageStyle Image style.\n * @param {module:ol/render/canvas~DeclutterGroup=} opt_declutterGroup Declutter.\n */\nVectorContext.prototype.setImageStyle = function(imageStyle, opt_declutterGroup) {};\n\n\n/**\n * @param {module:ol/style/Text} textStyle Text style.\n * @param {module:ol/render/canvas~DeclutterGroup=} opt_declutterGroup Declutter.\n */\nVectorContext.prototype.setTextStyle = function(textStyle, opt_declutterGroup) {};\nexport default VectorContext;\n","/**\n * @module ol/render/canvas/Immediate\n */\n// FIXME test, especially polygons with holes and multipolygons\n// FIXME need to handle large thick features (where pixel size matters)\n// FIXME add offset and end to ol/geom/flat/transform~transform2D?\n\nimport {inherits} from '../../util.js';\nimport {equals} from '../../array.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {intersects} from '../../extent.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport {transformGeom2D} from '../../geom/SimpleGeometry.js';\nimport {transform2D} from '../../geom/flat/transform.js';\nimport {CANVAS_LINE_DASH} from '../../has.js';\nimport VectorContext from '../VectorContext.js';\nimport {defaultTextAlign, defaultFillStyle, defaultLineCap, defaultLineDash, defaultLineDashOffset, defaultLineJoin, defaultLineWidth, defaultMiterLimit, defaultStrokeStyle, defaultTextBaseline, defaultFont} from '../canvas.js';\nimport {create as createTransform, compose as composeTransform} from '../../transform.js';\n\n/**\n * @classdesc\n * A concrete subclass of {@link module:ol/render/VectorContext} that implements\n * direct rendering of features and geometries to an HTML5 Canvas context.\n * Instances of this class are created internally by the library and\n * provided to application code as vectorContext member of the\n * {@link module:ol/render/Event~RenderEvent} object associated with postcompose, precompose and\n * render events emitted by layers and maps.\n *\n * @constructor\n * @extends {module:ol/render/VectorContext}\n * @param {CanvasRenderingContext2D} context Context.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {module:ol/transform~Transform} transform Transform.\n * @param {number} viewRotation View rotation.\n * @struct\n */\nconst CanvasImmediateRenderer = function(context, pixelRatio, extent, transform, viewRotation) {\n VectorContext.call(this);\n\n /**\n * @private\n * @type {CanvasRenderingContext2D}\n */\n this.context_ = context;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ = pixelRatio;\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.extent_ = extent;\n\n /**\n * @private\n * @type {module:ol/transform~Transform}\n */\n this.transform_ = transform;\n\n /**\n * @private\n * @type {number}\n */\n this.viewRotation_ = viewRotation;\n\n /**\n * @private\n * @type {?module:ol/render/canvas~FillState}\n */\n this.contextFillState_ = null;\n\n /**\n * @private\n * @type {?module:ol/render/canvas~StrokeState}\n */\n this.contextStrokeState_ = null;\n\n /**\n * @private\n * @type {?module:ol/render/canvas~TextState}\n */\n this.contextTextState_ = null;\n\n /**\n * @private\n * @type {?module:ol/render/canvas~FillState}\n */\n this.fillState_ = null;\n\n /**\n * @private\n * @type {?module:ol/render/canvas~StrokeState}\n */\n this.strokeState_ = null;\n\n /**\n * @private\n * @type {HTMLCanvasElement|HTMLVideoElement|Image}\n */\n this.image_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.imageAnchorX_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageAnchorY_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageHeight_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageOpacity_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageOriginX_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageOriginY_ = 0;\n\n /**\n * @private\n * @type {boolean}\n */\n this.imageRotateWithView_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.imageRotation_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.imageScale_ = 0;\n\n /**\n * @private\n * @type {boolean}\n */\n this.imageSnapToPixel_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.imageWidth_ = 0;\n\n /**\n * @private\n * @type {string}\n */\n this.text_ = '';\n\n /**\n * @private\n * @type {number}\n */\n this.textOffsetX_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.textOffsetY_ = 0;\n\n /**\n * @private\n * @type {boolean}\n */\n this.textRotateWithView_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.textRotation_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.textScale_ = 0;\n\n /**\n * @private\n * @type {?module:ol/render/canvas~FillState}\n */\n this.textFillState_ = null;\n\n /**\n * @private\n * @type {?module:ol/render/canvas~StrokeState}\n */\n this.textStrokeState_ = null;\n\n /**\n * @private\n * @type {?module:ol/render/canvas~TextState}\n */\n this.textState_ = null;\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.pixelCoordinates_ = [];\n\n /**\n * @private\n * @type {module:ol/transform~Transform}\n */\n this.tmpLocalTransform_ = createTransform();\n\n};\n\ninherits(CanvasImmediateRenderer, VectorContext);\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @private\n */\nCanvasImmediateRenderer.prototype.drawImages_ = function(flatCoordinates, offset, end, stride) {\n if (!this.image_) {\n return;\n }\n const pixelCoordinates = transform2D(\n flatCoordinates, offset, end, 2, this.transform_,\n this.pixelCoordinates_);\n const context = this.context_;\n const localTransform = this.tmpLocalTransform_;\n const alpha = context.globalAlpha;\n if (this.imageOpacity_ != 1) {\n context.globalAlpha = alpha * this.imageOpacity_;\n }\n let rotation = this.imageRotation_;\n if (this.imageRotateWithView_) {\n rotation += this.viewRotation_;\n }\n for (let i = 0, ii = pixelCoordinates.length; i < ii; i += 2) {\n let x = pixelCoordinates[i] - this.imageAnchorX_;\n let y = pixelCoordinates[i + 1] - this.imageAnchorY_;\n if (this.imageSnapToPixel_) {\n x = Math.round(x);\n y = Math.round(y);\n }\n if (rotation !== 0 || this.imageScale_ != 1) {\n const centerX = x + this.imageAnchorX_;\n const centerY = y + this.imageAnchorY_;\n composeTransform(localTransform,\n centerX, centerY,\n this.imageScale_, this.imageScale_,\n rotation,\n -centerX, -centerY);\n context.setTransform.apply(context, localTransform);\n }\n context.drawImage(this.image_, this.imageOriginX_, this.imageOriginY_,\n this.imageWidth_, this.imageHeight_, x, y,\n this.imageWidth_, this.imageHeight_);\n }\n if (rotation !== 0 || this.imageScale_ != 1) {\n context.setTransform(1, 0, 0, 1, 0, 0);\n }\n if (this.imageOpacity_ != 1) {\n context.globalAlpha = alpha;\n }\n};\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @private\n */\nCanvasImmediateRenderer.prototype.drawText_ = function(flatCoordinates, offset, end, stride) {\n if (!this.textState_ || this.text_ === '') {\n return;\n }\n if (this.textFillState_) {\n this.setContextFillState_(this.textFillState_);\n }\n if (this.textStrokeState_) {\n this.setContextStrokeState_(this.textStrokeState_);\n }\n this.setContextTextState_(this.textState_);\n const pixelCoordinates = transform2D(\n flatCoordinates, offset, end, stride, this.transform_,\n this.pixelCoordinates_);\n const context = this.context_;\n let rotation = this.textRotation_;\n if (this.textRotateWithView_) {\n rotation += this.viewRotation_;\n }\n for (; offset < end; offset += stride) {\n const x = pixelCoordinates[offset] + this.textOffsetX_;\n const y = pixelCoordinates[offset + 1] + this.textOffsetY_;\n if (rotation !== 0 || this.textScale_ != 1) {\n const localTransform = composeTransform(this.tmpLocalTransform_,\n x, y,\n this.textScale_, this.textScale_,\n rotation,\n -x, -y);\n context.setTransform.apply(context, localTransform);\n }\n if (this.textStrokeState_) {\n context.strokeText(this.text_, x, y);\n }\n if (this.textFillState_) {\n context.fillText(this.text_, x, y);\n }\n }\n if (rotation !== 0 || this.textScale_ != 1) {\n context.setTransform(1, 0, 0, 1, 0, 0);\n }\n};\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {boolean} close Close.\n * @private\n * @return {number} end End.\n */\nCanvasImmediateRenderer.prototype.moveToLineTo_ = function(flatCoordinates, offset, end, stride, close) {\n const context = this.context_;\n const pixelCoordinates = transform2D(\n flatCoordinates, offset, end, stride, this.transform_,\n this.pixelCoordinates_);\n context.moveTo(pixelCoordinates[0], pixelCoordinates[1]);\n let length = pixelCoordinates.length;\n if (close) {\n length -= 2;\n }\n for (let i = 2; i < length; i += 2) {\n context.lineTo(pixelCoordinates[i], pixelCoordinates[i + 1]);\n }\n if (close) {\n context.closePath();\n }\n return end;\n};\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @private\n * @return {number} End.\n */\nCanvasImmediateRenderer.prototype.drawRings_ = function(flatCoordinates, offset, ends, stride) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n offset = this.moveToLineTo_(flatCoordinates, offset, ends[i], stride, true);\n }\n return offset;\n};\n\n\n/**\n * Render a circle geometry into the canvas. Rendering is immediate and uses\n * the current fill and stroke styles.\n *\n * @param {module:ol/geom/Circle} geometry Circle geometry.\n * @override\n * @api\n */\nCanvasImmediateRenderer.prototype.drawCircle = function(geometry) {\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.fillState_ || this.strokeState_) {\n if (this.fillState_) {\n this.setContextFillState_(this.fillState_);\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n }\n const pixelCoordinates = transformGeom2D(\n geometry, this.transform_, this.pixelCoordinates_);\n const dx = pixelCoordinates[2] - pixelCoordinates[0];\n const dy = pixelCoordinates[3] - pixelCoordinates[1];\n const radius = Math.sqrt(dx * dx + dy * dy);\n const context = this.context_;\n context.beginPath();\n context.arc(\n pixelCoordinates[0], pixelCoordinates[1], radius, 0, 2 * Math.PI);\n if (this.fillState_) {\n context.fill();\n }\n if (this.strokeState_) {\n context.stroke();\n }\n }\n if (this.text_ !== '') {\n this.drawText_(geometry.getCenter(), 0, 2, 2);\n }\n};\n\n\n/**\n * Set the rendering style. Note that since this is an immediate rendering API,\n * any `zIndex` on the provided style will be ignored.\n *\n * @param {module:ol/style/Style} style The rendering style.\n * @override\n * @api\n */\nCanvasImmediateRenderer.prototype.setStyle = function(style) {\n this.setFillStrokeStyle(style.getFill(), style.getStroke());\n this.setImageStyle(style.getImage());\n this.setTextStyle(style.getText());\n};\n\n\n/**\n * Render a geometry into the canvas. Call\n * {@link module:ol/render/canvas/Immediate#setStyle} first to set the rendering style.\n *\n * @param {module:ol/geom/Geometry|module:ol/render/Feature} geometry The geometry to render.\n * @override\n * @api\n */\nCanvasImmediateRenderer.prototype.drawGeometry = function(geometry) {\n const type = geometry.getType();\n switch (type) {\n case GeometryType.POINT:\n this.drawPoint(/** @type {module:ol/geom/Point} */ (geometry));\n break;\n case GeometryType.LINE_STRING:\n this.drawLineString(/** @type {module:ol/geom/LineString} */ (geometry));\n break;\n case GeometryType.POLYGON:\n this.drawPolygon(/** @type {module:ol/geom/Polygon} */ (geometry));\n break;\n case GeometryType.MULTI_POINT:\n this.drawMultiPoint(/** @type {module:ol/geom/MultiPoint} */ (geometry));\n break;\n case GeometryType.MULTI_LINE_STRING:\n this.drawMultiLineString(/** @type {module:ol/geom/MultiLineString} */ (geometry));\n break;\n case GeometryType.MULTI_POLYGON:\n this.drawMultiPolygon(/** @type {module:ol/geom/MultiPolygon} */ (geometry));\n break;\n case GeometryType.GEOMETRY_COLLECTION:\n this.drawGeometryCollection(/** @type {module:ol/geom/GeometryCollection} */ (geometry));\n break;\n case GeometryType.CIRCLE:\n this.drawCircle(/** @type {module:ol/geom/Circle} */ (geometry));\n break;\n default:\n }\n};\n\n\n/**\n * Render a feature into the canvas. Note that any `zIndex` on the provided\n * style will be ignored - features are rendered immediately in the order that\n * this method is called. If you need `zIndex` support, you should be using an\n * {@link module:ol/layer/Vector~VectorLayer} instead.\n *\n * @param {module:ol/Feature} feature Feature.\n * @param {module:ol/style/Style} style Style.\n * @override\n * @api\n */\nCanvasImmediateRenderer.prototype.drawFeature = function(feature, style) {\n const geometry = style.getGeometryFunction()(feature);\n if (!geometry || !intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n this.setStyle(style);\n this.drawGeometry(geometry);\n};\n\n\n/**\n * Render a GeometryCollection to the canvas. Rendering is immediate and\n * uses the current styles appropriate for each geometry in the collection.\n *\n * @param {module:ol/geom/GeometryCollection} geometry Geometry collection.\n * @override\n */\nCanvasImmediateRenderer.prototype.drawGeometryCollection = function(geometry) {\n const geometries = geometry.getGeometriesArray();\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n this.drawGeometry(geometries[i]);\n }\n};\n\n\n/**\n * Render a Point geometry into the canvas. Rendering is immediate and uses\n * the current style.\n *\n * @param {module:ol/geom/Point|module:ol/render/Feature} geometry Point geometry.\n * @override\n */\nCanvasImmediateRenderer.prototype.drawPoint = function(geometry) {\n const flatCoordinates = geometry.getFlatCoordinates();\n const stride = geometry.getStride();\n if (this.image_) {\n this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n if (this.text_ !== '') {\n this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n};\n\n\n/**\n * Render a MultiPoint geometry into the canvas. Rendering is immediate and\n * uses the current style.\n *\n * @param {module:ol/geom/MultiPoint|module:ol/render/Feature} geometry MultiPoint geometry.\n * @override\n */\nCanvasImmediateRenderer.prototype.drawMultiPoint = function(geometry) {\n const flatCoordinates = geometry.getFlatCoordinates();\n const stride = geometry.getStride();\n if (this.image_) {\n this.drawImages_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n if (this.text_ !== '') {\n this.drawText_(flatCoordinates, 0, flatCoordinates.length, stride);\n }\n};\n\n\n/**\n * Render a LineString into the canvas. Rendering is immediate and uses\n * the current style.\n *\n * @param {module:ol/geom/LineString|module:ol/render/Feature} geometry LineString geometry.\n * @override\n */\nCanvasImmediateRenderer.prototype.drawLineString = function(geometry) {\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n const context = this.context_;\n const flatCoordinates = geometry.getFlatCoordinates();\n context.beginPath();\n this.moveToLineTo_(flatCoordinates, 0, flatCoordinates.length,\n geometry.getStride(), false);\n context.stroke();\n }\n if (this.text_ !== '') {\n const flatMidpoint = geometry.getFlatMidpoint();\n this.drawText_(flatMidpoint, 0, 2, 2);\n }\n};\n\n\n/**\n * Render a MultiLineString geometry into the canvas. Rendering is immediate\n * and uses the current style.\n *\n * @param {module:ol/geom/MultiLineString|module:ol/render/Feature} geometry MultiLineString geometry.\n * @override\n */\nCanvasImmediateRenderer.prototype.drawMultiLineString = function(geometry) {\n const geometryExtent = geometry.getExtent();\n if (!intersects(this.extent_, geometryExtent)) {\n return;\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n const context = this.context_;\n const flatCoordinates = geometry.getFlatCoordinates();\n let offset = 0;\n const ends = geometry.getEnds();\n const stride = geometry.getStride();\n context.beginPath();\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n offset = this.moveToLineTo_(flatCoordinates, offset, ends[i], stride, false);\n }\n context.stroke();\n }\n if (this.text_ !== '') {\n const flatMidpoints = geometry.getFlatMidpoints();\n this.drawText_(flatMidpoints, 0, flatMidpoints.length, 2);\n }\n};\n\n\n/**\n * Render a Polygon geometry into the canvas. Rendering is immediate and uses\n * the current style.\n *\n * @param {module:ol/geom/Polygon|module:ol/render/Feature} geometry Polygon geometry.\n * @override\n */\nCanvasImmediateRenderer.prototype.drawPolygon = function(geometry) {\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.strokeState_ || this.fillState_) {\n if (this.fillState_) {\n this.setContextFillState_(this.fillState_);\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n }\n const context = this.context_;\n context.beginPath();\n this.drawRings_(geometry.getOrientedFlatCoordinates(),\n 0, geometry.getEnds(), geometry.getStride());\n if (this.fillState_) {\n context.fill();\n }\n if (this.strokeState_) {\n context.stroke();\n }\n }\n if (this.text_ !== '') {\n const flatInteriorPoint = geometry.getFlatInteriorPoint();\n this.drawText_(flatInteriorPoint, 0, 2, 2);\n }\n};\n\n\n/**\n * Render MultiPolygon geometry into the canvas. Rendering is immediate and\n * uses the current style.\n * @param {module:ol/geom/MultiPolygon} geometry MultiPolygon geometry.\n * @override\n */\nCanvasImmediateRenderer.prototype.drawMultiPolygon = function(geometry) {\n if (!intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n if (this.strokeState_ || this.fillState_) {\n if (this.fillState_) {\n this.setContextFillState_(this.fillState_);\n }\n if (this.strokeState_) {\n this.setContextStrokeState_(this.strokeState_);\n }\n const context = this.context_;\n const flatCoordinates = geometry.getOrientedFlatCoordinates();\n let offset = 0;\n const endss = geometry.getEndss();\n const stride = geometry.getStride();\n context.beginPath();\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n offset = this.drawRings_(flatCoordinates, offset, ends, stride);\n }\n if (this.fillState_) {\n context.fill();\n }\n if (this.strokeState_) {\n context.stroke();\n }\n }\n if (this.text_ !== '') {\n const flatInteriorPoints = geometry.getFlatInteriorPoints();\n this.drawText_(flatInteriorPoints, 0, flatInteriorPoints.length, 2);\n }\n};\n\n\n/**\n * @param {module:ol/render/canvas~FillState} fillState Fill state.\n * @private\n */\nCanvasImmediateRenderer.prototype.setContextFillState_ = function(fillState) {\n const context = this.context_;\n const contextFillState = this.contextFillState_;\n if (!contextFillState) {\n context.fillStyle = fillState.fillStyle;\n this.contextFillState_ = {\n fillStyle: fillState.fillStyle\n };\n } else {\n if (contextFillState.fillStyle != fillState.fillStyle) {\n contextFillState.fillStyle = context.fillStyle = fillState.fillStyle;\n }\n }\n};\n\n\n/**\n * @param {module:ol/render/canvas~StrokeState} strokeState Stroke state.\n * @private\n */\nCanvasImmediateRenderer.prototype.setContextStrokeState_ = function(strokeState) {\n const context = this.context_;\n const contextStrokeState = this.contextStrokeState_;\n if (!contextStrokeState) {\n context.lineCap = strokeState.lineCap;\n if (CANVAS_LINE_DASH) {\n context.setLineDash(strokeState.lineDash);\n context.lineDashOffset = strokeState.lineDashOffset;\n }\n context.lineJoin = strokeState.lineJoin;\n context.lineWidth = strokeState.lineWidth;\n context.miterLimit = strokeState.miterLimit;\n context.strokeStyle = strokeState.strokeStyle;\n this.contextStrokeState_ = {\n lineCap: strokeState.lineCap,\n lineDash: strokeState.lineDash,\n lineDashOffset: strokeState.lineDashOffset,\n lineJoin: strokeState.lineJoin,\n lineWidth: strokeState.lineWidth,\n miterLimit: strokeState.miterLimit,\n strokeStyle: strokeState.strokeStyle\n };\n } else {\n if (contextStrokeState.lineCap != strokeState.lineCap) {\n contextStrokeState.lineCap = context.lineCap = strokeState.lineCap;\n }\n if (CANVAS_LINE_DASH) {\n if (!equals(contextStrokeState.lineDash, strokeState.lineDash)) {\n context.setLineDash(contextStrokeState.lineDash = strokeState.lineDash);\n }\n if (contextStrokeState.lineDashOffset != strokeState.lineDashOffset) {\n contextStrokeState.lineDashOffset = context.lineDashOffset =\n strokeState.lineDashOffset;\n }\n }\n if (contextStrokeState.lineJoin != strokeState.lineJoin) {\n contextStrokeState.lineJoin = context.lineJoin = strokeState.lineJoin;\n }\n if (contextStrokeState.lineWidth != strokeState.lineWidth) {\n contextStrokeState.lineWidth = context.lineWidth = strokeState.lineWidth;\n }\n if (contextStrokeState.miterLimit != strokeState.miterLimit) {\n contextStrokeState.miterLimit = context.miterLimit =\n strokeState.miterLimit;\n }\n if (contextStrokeState.strokeStyle != strokeState.strokeStyle) {\n contextStrokeState.strokeStyle = context.strokeStyle =\n strokeState.strokeStyle;\n }\n }\n};\n\n\n/**\n * @param {module:ol/render/canvas~TextState} textState Text state.\n * @private\n */\nCanvasImmediateRenderer.prototype.setContextTextState_ = function(textState) {\n const context = this.context_;\n const contextTextState = this.contextTextState_;\n const textAlign = textState.textAlign ?\n textState.textAlign : defaultTextAlign;\n if (!contextTextState) {\n context.font = textState.font;\n context.textAlign = textAlign;\n context.textBaseline = textState.textBaseline;\n this.contextTextState_ = {\n font: textState.font,\n textAlign: textAlign,\n textBaseline: textState.textBaseline\n };\n } else {\n if (contextTextState.font != textState.font) {\n contextTextState.font = context.font = textState.font;\n }\n if (contextTextState.textAlign != textAlign) {\n contextTextState.textAlign = context.textAlign = textAlign;\n }\n if (contextTextState.textBaseline != textState.textBaseline) {\n contextTextState.textBaseline = context.textBaseline =\n textState.textBaseline;\n }\n }\n};\n\n\n/**\n * Set the fill and stroke style for subsequent draw operations. To clear\n * either fill or stroke styles, pass null for the appropriate parameter.\n *\n * @param {module:ol/style/Fill} fillStyle Fill style.\n * @param {module:ol/style/Stroke} strokeStyle Stroke style.\n * @override\n */\nCanvasImmediateRenderer.prototype.setFillStrokeStyle = function(fillStyle, strokeStyle) {\n if (!fillStyle) {\n this.fillState_ = null;\n } else {\n const fillStyleColor = fillStyle.getColor();\n this.fillState_ = {\n fillStyle: asColorLike(fillStyleColor ?\n fillStyleColor : defaultFillStyle)\n };\n }\n if (!strokeStyle) {\n this.strokeState_ = null;\n } else {\n const strokeStyleColor = strokeStyle.getColor();\n const strokeStyleLineCap = strokeStyle.getLineCap();\n const strokeStyleLineDash = strokeStyle.getLineDash();\n const strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n const strokeStyleLineJoin = strokeStyle.getLineJoin();\n const strokeStyleWidth = strokeStyle.getWidth();\n const strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n this.strokeState_ = {\n lineCap: strokeStyleLineCap !== undefined ?\n strokeStyleLineCap : defaultLineCap,\n lineDash: strokeStyleLineDash ?\n strokeStyleLineDash : defaultLineDash,\n lineDashOffset: strokeStyleLineDashOffset ?\n strokeStyleLineDashOffset : defaultLineDashOffset,\n lineJoin: strokeStyleLineJoin !== undefined ?\n strokeStyleLineJoin : defaultLineJoin,\n lineWidth: this.pixelRatio_ * (strokeStyleWidth !== undefined ?\n strokeStyleWidth : defaultLineWidth),\n miterLimit: strokeStyleMiterLimit !== undefined ?\n strokeStyleMiterLimit : defaultMiterLimit,\n strokeStyle: asColorLike(strokeStyleColor ?\n strokeStyleColor : defaultStrokeStyle)\n };\n }\n};\n\n\n/**\n * Set the image style for subsequent draw operations. Pass null to remove\n * the image style.\n *\n * @param {module:ol/style/Image} imageStyle Image style.\n * @override\n */\nCanvasImmediateRenderer.prototype.setImageStyle = function(imageStyle) {\n if (!imageStyle) {\n this.image_ = null;\n } else {\n const imageAnchor = imageStyle.getAnchor();\n // FIXME pixel ratio\n const imageImage = imageStyle.getImage(1);\n const imageOrigin = imageStyle.getOrigin();\n const imageSize = imageStyle.getSize();\n this.imageAnchorX_ = imageAnchor[0];\n this.imageAnchorY_ = imageAnchor[1];\n this.imageHeight_ = imageSize[1];\n this.image_ = imageImage;\n this.imageOpacity_ = imageStyle.getOpacity();\n this.imageOriginX_ = imageOrigin[0];\n this.imageOriginY_ = imageOrigin[1];\n this.imageRotateWithView_ = imageStyle.getRotateWithView();\n this.imageRotation_ = imageStyle.getRotation();\n this.imageScale_ = imageStyle.getScale() * this.pixelRatio_;\n this.imageSnapToPixel_ = imageStyle.getSnapToPixel();\n this.imageWidth_ = imageSize[0];\n }\n};\n\n\n/**\n * Set the text style for subsequent draw operations. Pass null to\n * remove the text style.\n *\n * @param {module:ol/style/Text} textStyle Text style.\n * @override\n */\nCanvasImmediateRenderer.prototype.setTextStyle = function(textStyle) {\n if (!textStyle) {\n this.text_ = '';\n } else {\n const textFillStyle = textStyle.getFill();\n if (!textFillStyle) {\n this.textFillState_ = null;\n } else {\n const textFillStyleColor = textFillStyle.getColor();\n this.textFillState_ = {\n fillStyle: asColorLike(textFillStyleColor ?\n textFillStyleColor : defaultFillStyle)\n };\n }\n const textStrokeStyle = textStyle.getStroke();\n if (!textStrokeStyle) {\n this.textStrokeState_ = null;\n } else {\n const textStrokeStyleColor = textStrokeStyle.getColor();\n const textStrokeStyleLineCap = textStrokeStyle.getLineCap();\n const textStrokeStyleLineDash = textStrokeStyle.getLineDash();\n const textStrokeStyleLineDashOffset = textStrokeStyle.getLineDashOffset();\n const textStrokeStyleLineJoin = textStrokeStyle.getLineJoin();\n const textStrokeStyleWidth = textStrokeStyle.getWidth();\n const textStrokeStyleMiterLimit = textStrokeStyle.getMiterLimit();\n this.textStrokeState_ = {\n lineCap: textStrokeStyleLineCap !== undefined ?\n textStrokeStyleLineCap : defaultLineCap,\n lineDash: textStrokeStyleLineDash ?\n textStrokeStyleLineDash : defaultLineDash,\n lineDashOffset: textStrokeStyleLineDashOffset ?\n textStrokeStyleLineDashOffset : defaultLineDashOffset,\n lineJoin: textStrokeStyleLineJoin !== undefined ?\n textStrokeStyleLineJoin : defaultLineJoin,\n lineWidth: textStrokeStyleWidth !== undefined ?\n textStrokeStyleWidth : defaultLineWidth,\n miterLimit: textStrokeStyleMiterLimit !== undefined ?\n textStrokeStyleMiterLimit : defaultMiterLimit,\n strokeStyle: asColorLike(textStrokeStyleColor ?\n textStrokeStyleColor : defaultStrokeStyle)\n };\n }\n const textFont = textStyle.getFont();\n const textOffsetX = textStyle.getOffsetX();\n const textOffsetY = textStyle.getOffsetY();\n const textRotateWithView = textStyle.getRotateWithView();\n const textRotation = textStyle.getRotation();\n const textScale = textStyle.getScale();\n const textText = textStyle.getText();\n const textTextAlign = textStyle.getTextAlign();\n const textTextBaseline = textStyle.getTextBaseline();\n this.textState_ = {\n font: textFont !== undefined ?\n textFont : defaultFont,\n textAlign: textTextAlign !== undefined ?\n textTextAlign : defaultTextAlign,\n textBaseline: textTextBaseline !== undefined ?\n textTextBaseline : defaultTextBaseline\n };\n this.text_ = textText !== undefined ? textText : '';\n this.textOffsetX_ =\n textOffsetX !== undefined ? (this.pixelRatio_ * textOffsetX) : 0;\n this.textOffsetY_ =\n textOffsetY !== undefined ? (this.pixelRatio_ * textOffsetY) : 0;\n this.textRotateWithView_ = textRotateWithView !== undefined ? textRotateWithView : false;\n this.textRotation_ = textRotation !== undefined ? textRotation : 0;\n this.textScale_ = this.pixelRatio_ * (textScale !== undefined ?\n textScale : 1);\n }\n};\nexport default CanvasImmediateRenderer;\n","/**\n * @module ol/style/IconImageCache\n */\nimport {asString} from '../color.js';\n\n/**\n * Singleton class. Available through {@link module:ol/style/IconImageCache~shared}.\n * @constructor\n */\nconst IconImageCache = function() {\n\n /**\n * @type {!Object.<string, module:ol/style/IconImage>}\n * @private\n */\n this.cache_ = {};\n\n /**\n * @type {number}\n * @private\n */\n this.cacheSize_ = 0;\n\n /**\n * @type {number}\n * @private\n */\n this.maxCacheSize_ = 32;\n};\n\n\n/**\n * @param {string} src Src.\n * @param {?string} crossOrigin Cross origin.\n * @param {module:ol/color~Color} color Color.\n * @return {string} Cache key.\n */\nfunction getKey(src, crossOrigin, color) {\n const colorString = color ? asString(color) : 'null';\n return crossOrigin + ':' + src + ':' + colorString;\n}\n\n\n/**\n * FIXME empty description for jsdoc\n */\nIconImageCache.prototype.clear = function() {\n this.cache_ = {};\n this.cacheSize_ = 0;\n};\n\n\n/**\n * FIXME empty description for jsdoc\n */\nIconImageCache.prototype.expire = function() {\n if (this.cacheSize_ > this.maxCacheSize_) {\n let i = 0;\n for (const key in this.cache_) {\n const iconImage = this.cache_[key];\n if ((i++ & 3) === 0 && !iconImage.hasListener()) {\n delete this.cache_[key];\n --this.cacheSize_;\n }\n }\n }\n};\n\n\n/**\n * @param {string} src Src.\n * @param {?string} crossOrigin Cross origin.\n * @param {module:ol/color~Color} color Color.\n * @return {module:ol/style/IconImage} Icon image.\n */\nIconImageCache.prototype.get = function(src, crossOrigin, color) {\n const key = getKey(src, crossOrigin, color);\n return key in this.cache_ ? this.cache_[key] : null;\n};\n\n\n/**\n * @param {string} src Src.\n * @param {?string} crossOrigin Cross origin.\n * @param {module:ol/color~Color} color Color.\n * @param {module:ol/style/IconImage} iconImage Icon image.\n */\nIconImageCache.prototype.set = function(src, crossOrigin, color, iconImage) {\n const key = getKey(src, crossOrigin, color);\n this.cache_[key] = iconImage;\n ++this.cacheSize_;\n};\n\n\n/**\n * Set the cache size of the icon cache. Default is `32`. Change this value when\n * your map uses more than 32 different icon images and you are not caching icon\n * styles on the application level.\n * @param {number} maxCacheSize Cache max size.\n * @api\n */\nIconImageCache.prototype.setSize = function(maxCacheSize) {\n this.maxCacheSize_ = maxCacheSize;\n this.expire();\n};\nexport default IconImageCache;\n\n\n/**\n * The {@link module:ol/style/IconImageCache~IconImageCache} for\n * {@link module:ol/style/Icon~Icon} images.\n * @api\n */\nexport const shared = new IconImageCache();\n","/**\n * @module ol/renderer/Map\n */\nimport {getUid, inherits} from '../util.js';\nimport Disposable from '../Disposable.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getWidth} from '../extent.js';\nimport {TRUE, UNDEFINED} from '../functions.js';\nimport {visibleAtResolution} from '../layer/Layer.js';\nimport {shared as iconImageCache} from '../style/IconImageCache.js';\nimport {compose as composeTransform, invert as invertTransform, setFromArray as transformSetFromArray} from '../transform.js';\n\n\n/**\n * @constructor\n * @abstract\n * @extends {module:ol/Disposable}\n * @param {module:ol/PluggableMap} map Map.\n * @struct\n */\nconst MapRenderer = function(map) {\n Disposable.call(this);\n\n /**\n * @private\n * @type {module:ol/PluggableMap}\n */\n this.map_ = map;\n\n /**\n * @private\n * @type {!Object.<string, module:ol/renderer/Layer>}\n */\n this.layerRenderers_ = {};\n\n /**\n * @private\n * @type {Object.<string, module:ol/events~EventsKey>}\n */\n this.layerRendererListeners_ = {};\n\n /**\n * @private\n * @type {Array.<module:ol/renderer/Layer>}\n */\n this.layerRendererConstructors_ = [];\n\n};\n\ninherits(MapRenderer, Disposable);\n\n\n/**\n * Register layer renderer constructors.\n * @param {Array.<module:ol/renderer/Layer>} constructors Layer renderers.\n */\nMapRenderer.prototype.registerLayerRenderers = function(constructors) {\n this.layerRendererConstructors_.push.apply(this.layerRendererConstructors_, constructors);\n};\n\n\n/**\n * Get the registered layer renderer constructors.\n * @return {Array.<module:ol/renderer/Layer>} Registered layer renderers.\n */\nMapRenderer.prototype.getLayerRendererConstructors = function() {\n return this.layerRendererConstructors_;\n};\n\n\n/**\n * @param {module:ol/PluggableMap~FrameState} frameState FrameState.\n * @protected\n */\nMapRenderer.prototype.calculateMatrices2D = function(frameState) {\n const viewState = frameState.viewState;\n const coordinateToPixelTransform = frameState.coordinateToPixelTransform;\n const pixelToCoordinateTransform = frameState.pixelToCoordinateTransform;\n\n composeTransform(coordinateToPixelTransform,\n frameState.size[0] / 2, frameState.size[1] / 2,\n 1 / viewState.resolution, -1 / viewState.resolution,\n -viewState.rotation,\n -viewState.center[0], -viewState.center[1]);\n\n invertTransform(\n transformSetFromArray(pixelToCoordinateTransform, coordinateToPixelTransform));\n};\n\n\n/**\n * Removes all layer renderers.\n */\nMapRenderer.prototype.removeLayerRenderers = function() {\n for (const key in this.layerRenderers_) {\n this.removeLayerRendererByKey_(key).dispose();\n }\n};\n\n\n/**\n * @param {module:ol/PluggableMap} map Map.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n */\nfunction expireIconCache(map, frameState) {\n iconImageCache.expire();\n}\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {module:ol/PluggableMap~FrameState} frameState FrameState.\n * @param {number} hitTolerance Hit tolerance in pixels.\n * @param {function(this: S, (module:ol/Feature|module:ol/render/Feature),\n * module:ol/layer/Layer): T} callback Feature callback.\n * @param {S} thisArg Value to use as `this` when executing `callback`.\n * @param {function(this: U, module:ol/layer/Layer): boolean} layerFilter Layer filter\n * function, only layers which are visible and for which this function\n * returns `true` will be tested for features. By default, all visible\n * layers will be tested.\n * @param {U} thisArg2 Value to use as `this` when executing `layerFilter`.\n * @return {T|undefined} Callback result.\n * @template S,T,U\n */\nMapRenderer.prototype.forEachFeatureAtCoordinate = function(coordinate, frameState, hitTolerance, callback, thisArg,\n layerFilter, thisArg2) {\n let result;\n const viewState = frameState.viewState;\n const viewResolution = viewState.resolution;\n\n /**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @param {module:ol/layer/Layer} layer Layer.\n * @return {?} Callback result.\n */\n function forEachFeatureAtCoordinate(feature, layer) {\n const key = getUid(feature).toString();\n const managed = frameState.layerStates[getUid(layer)].managed;\n if (!(key in frameState.skippedFeatureUids && !managed)) {\n return callback.call(thisArg, feature, managed ? layer : null);\n }\n }\n\n const projection = viewState.projection;\n\n let translatedCoordinate = coordinate;\n if (projection.canWrapX()) {\n const projectionExtent = projection.getExtent();\n const worldWidth = getWidth(projectionExtent);\n const x = coordinate[0];\n if (x < projectionExtent[0] || x > projectionExtent[2]) {\n const worldsAway = Math.ceil((projectionExtent[0] - x) / worldWidth);\n translatedCoordinate = [x + worldWidth * worldsAway, coordinate[1]];\n }\n }\n\n const layerStates = frameState.layerStatesArray;\n const numLayers = layerStates.length;\n let i;\n for (i = numLayers - 1; i >= 0; --i) {\n const layerState = layerStates[i];\n const layer = layerState.layer;\n if (visibleAtResolution(layerState, viewResolution) && layerFilter.call(thisArg2, layer)) {\n const layerRenderer = this.getLayerRenderer(layer);\n if (layer.getSource()) {\n result = layerRenderer.forEachFeatureAtCoordinate(\n layer.getSource().getWrapX() ? translatedCoordinate : coordinate,\n frameState, hitTolerance, forEachFeatureAtCoordinate, thisArg);\n }\n if (result) {\n return result;\n }\n }\n }\n return undefined;\n};\n\n\n/**\n * @abstract\n * @param {module:ol~Pixel} pixel Pixel.\n * @param {module:ol/PluggableMap~FrameState} frameState FrameState.\n * @param {number} hitTolerance Hit tolerance in pixels.\n * @param {function(this: S, module:ol/layer/Layer, (Uint8ClampedArray|Uint8Array)): T} callback Layer\n * callback.\n * @param {S} thisArg Value to use as `this` when executing `callback`.\n * @param {function(this: U, module:ol/layer/Layer): boolean} layerFilter Layer filter\n * function, only layers which are visible and for which this function\n * returns `true` will be tested for features. By default, all visible\n * layers will be tested.\n * @param {U} thisArg2 Value to use as `this` when executing `layerFilter`.\n * @return {T|undefined} Callback result.\n * @template S,T,U\n */\nMapRenderer.prototype.forEachLayerAtPixel = function(pixel, frameState, hitTolerance, callback, thisArg,\n layerFilter, thisArg2) {};\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {module:ol/PluggableMap~FrameState} frameState FrameState.\n * @param {number} hitTolerance Hit tolerance in pixels.\n * @param {function(this: U, module:ol/layer/Layer): boolean} layerFilter Layer filter\n * function, only layers which are visible and for which this function\n * returns `true` will be tested for features. By default, all visible\n * layers will be tested.\n * @param {U} thisArg Value to use as `this` when executing `layerFilter`.\n * @return {boolean} Is there a feature at the given coordinate?\n * @template U\n */\nMapRenderer.prototype.hasFeatureAtCoordinate = function(coordinate, frameState, hitTolerance, layerFilter, thisArg) {\n const hasFeature = this.forEachFeatureAtCoordinate(\n coordinate, frameState, hitTolerance, TRUE, this, layerFilter, thisArg);\n\n return hasFeature !== undefined;\n};\n\n\n/**\n * @param {module:ol/layer/Layer} layer Layer.\n * @protected\n * @return {module:ol/renderer/Layer} Layer renderer.\n */\nMapRenderer.prototype.getLayerRenderer = function(layer) {\n const layerKey = getUid(layer).toString();\n if (layerKey in this.layerRenderers_) {\n return this.layerRenderers_[layerKey];\n } else {\n let renderer;\n for (let i = 0, ii = this.layerRendererConstructors_.length; i < ii; ++i) {\n const candidate = this.layerRendererConstructors_[i];\n if (candidate['handles'](layer)) {\n renderer = candidate['create'](this, layer);\n break;\n }\n }\n if (renderer) {\n this.layerRenderers_[layerKey] = renderer;\n this.layerRendererListeners_[layerKey] = listen(renderer,\n EventType.CHANGE, this.handleLayerRendererChange_, this);\n } else {\n throw new Error('Unable to create renderer for layer: ' + layer.getType());\n }\n return renderer;\n }\n};\n\n\n/**\n * @param {string} layerKey Layer key.\n * @protected\n * @return {module:ol/renderer/Layer} Layer renderer.\n */\nMapRenderer.prototype.getLayerRendererByKey = function(layerKey) {\n return this.layerRenderers_[layerKey];\n};\n\n\n/**\n * @protected\n * @return {Object.<string, module:ol/renderer/Layer>} Layer renderers.\n */\nMapRenderer.prototype.getLayerRenderers = function() {\n return this.layerRenderers_;\n};\n\n\n/**\n * @return {module:ol/PluggableMap} Map.\n */\nMapRenderer.prototype.getMap = function() {\n return this.map_;\n};\n\n\n/**\n * Handle changes in a layer renderer.\n * @private\n */\nMapRenderer.prototype.handleLayerRendererChange_ = function() {\n this.map_.render();\n};\n\n\n/**\n * @param {string} layerKey Layer key.\n * @return {module:ol/renderer/Layer} Layer renderer.\n * @private\n */\nMapRenderer.prototype.removeLayerRendererByKey_ = function(layerKey) {\n const layerRenderer = this.layerRenderers_[layerKey];\n delete this.layerRenderers_[layerKey];\n\n unlistenByKey(this.layerRendererListeners_[layerKey]);\n delete this.layerRendererListeners_[layerKey];\n\n return layerRenderer;\n};\n\n\n/**\n * Render.\n * @param {?module:ol/PluggableMap~FrameState} frameState Frame state.\n */\nMapRenderer.prototype.renderFrame = UNDEFINED;\n\n\n/**\n * @param {module:ol/PluggableMap} map Map.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @private\n */\nMapRenderer.prototype.removeUnusedLayerRenderers_ = function(map, frameState) {\n for (const layerKey in this.layerRenderers_) {\n if (!frameState || !(layerKey in frameState.layerStates)) {\n this.removeLayerRendererByKey_(layerKey).dispose();\n }\n }\n};\n\n\n/**\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @protected\n */\nMapRenderer.prototype.scheduleExpireIconCache = function(frameState) {\n frameState.postRenderFunctions.push(/** @type {module:ol/PluggableMap~PostRenderFunction} */ (expireIconCache));\n};\n\n\n/**\n * @param {!module:ol/PluggableMap~FrameState} frameState Frame state.\n * @protected\n */\nMapRenderer.prototype.scheduleRemoveUnusedLayerRenderers = function(frameState) {\n for (const layerKey in this.layerRenderers_) {\n if (!(layerKey in frameState.layerStates)) {\n frameState.postRenderFunctions.push(\n /** @type {module:ol/PluggableMap~PostRenderFunction} */ (this.removeUnusedLayerRenderers_.bind(this))\n );\n return;\n }\n }\n};\n\n\n/**\n * @param {module:ol/layer/Layer~State} state1 First layer state.\n * @param {module:ol/layer/Layer~State} state2 Second layer state.\n * @return {number} The zIndex difference.\n */\nexport function sortByZIndex(state1, state2) {\n return state1.zIndex - state2.zIndex;\n}\nexport default MapRenderer;\n","/**\n * @module ol/renderer/canvas/Map\n */\nimport {create as createTransform, apply as applyTransform, compose as composeTransform} from '../../transform.js';\nimport {inherits} from '../../util.js';\nimport {includes, stableSort} from '../../array.js';\nimport {CLASS_UNSELECTABLE} from '../../css.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {visibleAtResolution} from '../../layer/Layer.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport {rotateAtOffset} from '../../render/canvas.js';\nimport CanvasImmediateRenderer from '../../render/canvas/Immediate.js';\nimport MapRenderer, {sortByZIndex} from '../Map.js';\nimport SourceState from '../../source/State.js';\n\n\n/**\n * @type {Array.<module:ol/renderer/Layer>}\n */\nexport const layerRendererConstructors = [];\n\n\n/**\n * @constructor\n * @extends {module:ol/renderer/Map}\n * @param {module:ol/PluggableMap} map Map.\n * @api\n */\nconst CanvasMapRenderer = function(map) {\n MapRenderer.call(this, map);\n\n const container = map.getViewport();\n\n /**\n * @private\n * @type {CanvasRenderingContext2D}\n */\n this.context_ = createCanvasContext2D();\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = this.context_.canvas;\n\n this.canvas_.style.width = '100%';\n this.canvas_.style.height = '100%';\n this.canvas_.style.display = 'block';\n this.canvas_.className = CLASS_UNSELECTABLE;\n container.insertBefore(this.canvas_, container.childNodes[0] || null);\n\n /**\n * @private\n * @type {boolean}\n */\n this.renderedVisible_ = true;\n\n /**\n * @private\n * @type {module:ol/transform~Transform}\n */\n this.transform_ = createTransform();\n\n};\n\ninherits(CanvasMapRenderer, MapRenderer);\n\n\n/**\n * @param {module:ol/render/EventType} type Event type.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @private\n */\nCanvasMapRenderer.prototype.dispatchComposeEvent_ = function(type, frameState) {\n const map = this.getMap();\n const context = this.context_;\n if (map.hasListener(type)) {\n const extent = frameState.extent;\n const pixelRatio = frameState.pixelRatio;\n const viewState = frameState.viewState;\n const rotation = viewState.rotation;\n\n const transform = this.getTransform(frameState);\n\n const vectorContext = new CanvasImmediateRenderer(context, pixelRatio,\n extent, transform, rotation);\n const composeEvent = new RenderEvent(type, vectorContext,\n frameState, context, null);\n map.dispatchEvent(composeEvent);\n }\n};\n\n\n/**\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @protected\n * @return {!module:ol/transform~Transform} Transform.\n */\nCanvasMapRenderer.prototype.getTransform = function(frameState) {\n const viewState = frameState.viewState;\n const dx1 = this.canvas_.width / 2;\n const dy1 = this.canvas_.height / 2;\n const sx = frameState.pixelRatio / viewState.resolution;\n const sy = -sx;\n const angle = -viewState.rotation;\n const dx2 = -viewState.center[0];\n const dy2 = -viewState.center[1];\n return composeTransform(this.transform_, dx1, dy1, sx, sy, angle, dx2, dy2);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasMapRenderer.prototype.renderFrame = function(frameState) {\n\n if (!frameState) {\n if (this.renderedVisible_) {\n this.canvas_.style.display = 'none';\n this.renderedVisible_ = false;\n }\n return;\n }\n\n const context = this.context_;\n const pixelRatio = frameState.pixelRatio;\n const width = Math.round(frameState.size[0] * pixelRatio);\n const height = Math.round(frameState.size[1] * pixelRatio);\n if (this.canvas_.width != width || this.canvas_.height != height) {\n this.canvas_.width = width;\n this.canvas_.height = height;\n } else {\n context.clearRect(0, 0, width, height);\n }\n\n const rotation = frameState.viewState.rotation;\n\n this.calculateMatrices2D(frameState);\n\n this.dispatchComposeEvent_(RenderEventType.PRECOMPOSE, frameState);\n\n const layerStatesArray = frameState.layerStatesArray;\n stableSort(layerStatesArray, sortByZIndex);\n\n if (rotation) {\n context.save();\n rotateAtOffset(context, rotation, width / 2, height / 2);\n }\n\n const viewResolution = frameState.viewState.resolution;\n let i, ii, layer, layerRenderer, layerState;\n for (i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n layerState = layerStatesArray[i];\n layer = layerState.layer;\n layerRenderer = /** @type {module:ol/renderer/canvas/Layer} */ (this.getLayerRenderer(layer));\n if (!visibleAtResolution(layerState, viewResolution) ||\n layerState.sourceState != SourceState.READY) {\n continue;\n }\n if (layerRenderer.prepareFrame(frameState, layerState)) {\n layerRenderer.composeFrame(frameState, layerState, context);\n }\n }\n\n if (rotation) {\n context.restore();\n }\n\n this.dispatchComposeEvent_(RenderEventType.POSTCOMPOSE, frameState);\n\n if (!this.renderedVisible_) {\n this.canvas_.style.display = '';\n this.renderedVisible_ = true;\n }\n\n this.scheduleRemoveUnusedLayerRenderers(frameState);\n this.scheduleExpireIconCache(frameState);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasMapRenderer.prototype.forEachLayerAtPixel = function(pixel, frameState, hitTolerance, callback, thisArg,\n layerFilter, thisArg2) {\n let result;\n const viewState = frameState.viewState;\n const viewResolution = viewState.resolution;\n\n const layerStates = frameState.layerStatesArray;\n const numLayers = layerStates.length;\n\n const coordinate = applyTransform(\n frameState.pixelToCoordinateTransform, pixel.slice());\n\n let i;\n for (i = numLayers - 1; i >= 0; --i) {\n const layerState = layerStates[i];\n const layer = layerState.layer;\n if (visibleAtResolution(layerState, viewResolution) && layerFilter.call(thisArg2, layer)) {\n const layerRenderer = /** @type {module:ol/renderer/canvas/Layer} */ (this.getLayerRenderer(layer));\n result = layerRenderer.forEachLayerAtCoordinate(\n coordinate, frameState, hitTolerance, callback, thisArg);\n if (result) {\n return result;\n }\n }\n }\n return undefined;\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasMapRenderer.prototype.registerLayerRenderers = function(constructors) {\n MapRenderer.prototype.registerLayerRenderers.call(this, constructors);\n for (let i = 0, ii = constructors.length; i < ii; ++i) {\n const ctor = constructors[i];\n if (!includes(layerRendererConstructors, ctor)) {\n layerRendererConstructors.push(ctor);\n }\n }\n};\n\nexport default CanvasMapRenderer;\n","/**\n * @module ol/renderer/Layer\n */\nimport {getUid, inherits} from '../util.js';\nimport ImageState from '../ImageState.js';\nimport Observable from '../Observable.js';\nimport TileState from '../TileState.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {FALSE, UNDEFINED} from '../functions.js';\nimport SourceState from '../source/State.js';\n\n/**\n * @constructor\n * @extends {module:ol/Observable}\n * @param {module:ol/layer/Layer} layer Layer.\n * @struct\n */\nconst LayerRenderer = function(layer) {\n\n Observable.call(this);\n\n /**\n * @private\n * @type {module:ol/layer/Layer}\n */\n this.layer_ = layer;\n\n\n};\n\ninherits(LayerRenderer, Observable);\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {number} hitTolerance Hit tolerance in pixels.\n * @param {function(this: S, (module:ol/Feature|module:ol/render/Feature), module:ol/layer/Layer): T}\n * callback Feature callback.\n * @param {S} thisArg Value to use as `this` when executing `callback`.\n * @return {T|undefined} Callback result.\n * @template S,T\n */\nLayerRenderer.prototype.forEachFeatureAtCoordinate = UNDEFINED;\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @return {boolean} Is there a feature at the given coordinate?\n */\nLayerRenderer.prototype.hasFeatureAtCoordinate = FALSE;\n\n\n/**\n * Create a function that adds loaded tiles to the tile lookup.\n * @param {module:ol/source/Tile} source Tile source.\n * @param {module:ol/proj/Projection} projection Projection of the tiles.\n * @param {Object.<number, Object.<string, module:ol/Tile>>} tiles Lookup of loaded tiles by zoom level.\n * @return {function(number, module:ol/TileRange):boolean} A function that can be\n * called with a zoom level and a tile range to add loaded tiles to the lookup.\n * @protected\n */\nLayerRenderer.prototype.createLoadedTileFinder = function(source, projection, tiles) {\n return (\n /**\n * @param {number} zoom Zoom level.\n * @param {module:ol/TileRange} tileRange Tile range.\n * @return {boolean} The tile range is fully loaded.\n */\n function(zoom, tileRange) {\n function callback(tile) {\n if (!tiles[zoom]) {\n tiles[zoom] = {};\n }\n tiles[zoom][tile.tileCoord.toString()] = tile;\n }\n return source.forEachLoadedTile(projection, zoom, tileRange, callback);\n }\n );\n};\n\n\n/**\n * @return {module:ol/layer/Layer} Layer.\n */\nLayerRenderer.prototype.getLayer = function() {\n return this.layer_;\n};\n\n\n/**\n * Handle changes in image state.\n * @param {module:ol/events/Event} event Image change event.\n * @private\n */\nLayerRenderer.prototype.handleImageChange_ = function(event) {\n const image = /** @type {module:ol/Image} */ (event.target);\n if (image.getState() === ImageState.LOADED) {\n this.renderIfReadyAndVisible();\n }\n};\n\n\n/**\n * Load the image if not already loaded, and register the image change\n * listener if needed.\n * @param {module:ol/ImageBase} image Image.\n * @return {boolean} `true` if the image is already loaded, `false` otherwise.\n * @protected\n */\nLayerRenderer.prototype.loadImage = function(image) {\n let imageState = image.getState();\n if (imageState != ImageState.LOADED && imageState != ImageState.ERROR) {\n listen(image, EventType.CHANGE, this.handleImageChange_, this);\n }\n if (imageState == ImageState.IDLE) {\n image.load();\n imageState = image.getState();\n }\n return imageState == ImageState.LOADED;\n};\n\n\n/**\n * @protected\n */\nLayerRenderer.prototype.renderIfReadyAndVisible = function() {\n const layer = this.getLayer();\n if (layer.getVisible() && layer.getSourceState() == SourceState.READY) {\n this.changed();\n }\n};\n\n\n/**\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {module:ol/source/Tile} tileSource Tile source.\n * @protected\n */\nLayerRenderer.prototype.scheduleExpireCache = function(frameState, tileSource) {\n if (tileSource.canExpireCache()) {\n /**\n * @param {module:ol/source/Tile} tileSource Tile source.\n * @param {module:ol/PluggableMap} map Map.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n */\n const postRenderFunction = function(tileSource, map, frameState) {\n const tileSourceKey = getUid(tileSource).toString();\n if (tileSourceKey in frameState.usedTiles) {\n tileSource.expireCache(frameState.viewState.projection,\n frameState.usedTiles[tileSourceKey]);\n }\n }.bind(null, tileSource);\n\n frameState.postRenderFunctions.push(\n /** @type {module:ol/PluggableMap~PostRenderFunction} */ (postRenderFunction)\n );\n }\n};\n\n\n/**\n * @param {!Object.<string, !Object.<string, module:ol/TileRange>>} usedTiles Used tiles.\n * @param {module:ol/source/Tile} tileSource Tile source.\n * @param {number} z Z.\n * @param {module:ol/TileRange} tileRange Tile range.\n * @protected\n */\nLayerRenderer.prototype.updateUsedTiles = function(usedTiles, tileSource, z, tileRange) {\n // FIXME should we use tilesToDrawByZ instead?\n const tileSourceKey = getUid(tileSource).toString();\n const zKey = z.toString();\n if (tileSourceKey in usedTiles) {\n if (zKey in usedTiles[tileSourceKey]) {\n usedTiles[tileSourceKey][zKey].extend(tileRange);\n } else {\n usedTiles[tileSourceKey][zKey] = tileRange;\n }\n } else {\n usedTiles[tileSourceKey] = {};\n usedTiles[tileSourceKey][zKey] = tileRange;\n }\n};\n\n\n/**\n * Manage tile pyramid.\n * This function performs a number of functions related to the tiles at the\n * current zoom and lower zoom levels:\n * - registers idle tiles in frameState.wantedTiles so that they are not\n * discarded by the tile queue\n * - enqueues missing tiles\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {module:ol/source/Tile} tileSource Tile source.\n * @param {module:ol/tilegrid/TileGrid} tileGrid Tile grid.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} currentZ Current Z.\n * @param {number} preload Load low resolution tiles up to 'preload' levels.\n * @param {function(this: T, module:ol/Tile)=} opt_tileCallback Tile callback.\n * @param {T=} opt_this Object to use as `this` in `opt_tileCallback`.\n * @protected\n * @template T\n */\nLayerRenderer.prototype.manageTilePyramid = function(\n frameState, tileSource, tileGrid, pixelRatio, projection, extent,\n currentZ, preload, opt_tileCallback, opt_this) {\n const tileSourceKey = getUid(tileSource).toString();\n if (!(tileSourceKey in frameState.wantedTiles)) {\n frameState.wantedTiles[tileSourceKey] = {};\n }\n const wantedTiles = frameState.wantedTiles[tileSourceKey];\n const tileQueue = frameState.tileQueue;\n const minZoom = tileGrid.getMinZoom();\n let tile, tileRange, tileResolution, x, y, z;\n for (z = minZoom; z <= currentZ; ++z) {\n tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z, tileRange);\n tileResolution = tileGrid.getResolution(z);\n for (x = tileRange.minX; x <= tileRange.maxX; ++x) {\n for (y = tileRange.minY; y <= tileRange.maxY; ++y) {\n if (currentZ - z <= preload) {\n tile = tileSource.getTile(z, x, y, pixelRatio, projection);\n if (tile.getState() == TileState.IDLE) {\n wantedTiles[tile.getKey()] = true;\n if (!tileQueue.isKeyQueued(tile.getKey())) {\n tileQueue.enqueue([tile, tileSourceKey,\n tileGrid.getTileCoordCenter(tile.tileCoord), tileResolution]);\n }\n }\n if (opt_tileCallback !== undefined) {\n opt_tileCallback.call(opt_this, tile);\n }\n } else {\n tileSource.useTile(z, x, y, projection);\n }\n }\n }\n }\n};\nexport default LayerRenderer;\n","/**\n * @module ol/renderer/canvas/Layer\n */\nimport {inherits} from '../../util.js';\nimport {getBottomLeft, getBottomRight, getTopLeft, getTopRight} from '../../extent.js';\nimport {TRUE} from '../../functions.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport {rotateAtOffset} from '../../render/canvas.js';\nimport CanvasImmediateRenderer from '../../render/canvas/Immediate.js';\nimport LayerRenderer from '../Layer.js';\nimport {create as createTransform, apply as applyTransform, compose as composeTransform} from '../../transform.js';\n\n/**\n * @constructor\n * @abstract\n * @extends {module:ol/renderer/Layer}\n * @param {module:ol/layer/Layer} layer Layer.\n */\nconst CanvasLayerRenderer = function(layer) {\n\n LayerRenderer.call(this, layer);\n\n /**\n * @protected\n * @type {number}\n */\n this.renderedResolution;\n\n /**\n * @private\n * @type {module:ol/transform~Transform}\n */\n this.transform_ = createTransform();\n\n};\n\ninherits(CanvasLayerRenderer, LayerRenderer);\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {module:ol/extent~Extent} extent Clip extent.\n * @protected\n */\nCanvasLayerRenderer.prototype.clip = function(context, frameState, extent) {\n const pixelRatio = frameState.pixelRatio;\n const width = frameState.size[0] * pixelRatio;\n const height = frameState.size[1] * pixelRatio;\n const rotation = frameState.viewState.rotation;\n const topLeft = getTopLeft(/** @type {module:ol/extent~Extent} */ (extent));\n const topRight = getTopRight(/** @type {module:ol/extent~Extent} */ (extent));\n const bottomRight = getBottomRight(/** @type {module:ol/extent~Extent} */ (extent));\n const bottomLeft = getBottomLeft(/** @type {module:ol/extent~Extent} */ (extent));\n\n applyTransform(frameState.coordinateToPixelTransform, topLeft);\n applyTransform(frameState.coordinateToPixelTransform, topRight);\n applyTransform(frameState.coordinateToPixelTransform, bottomRight);\n applyTransform(frameState.coordinateToPixelTransform, bottomLeft);\n\n context.save();\n rotateAtOffset(context, -rotation, width / 2, height / 2);\n context.beginPath();\n context.moveTo(topLeft[0] * pixelRatio, topLeft[1] * pixelRatio);\n context.lineTo(topRight[0] * pixelRatio, topRight[1] * pixelRatio);\n context.lineTo(bottomRight[0] * pixelRatio, bottomRight[1] * pixelRatio);\n context.lineTo(bottomLeft[0] * pixelRatio, bottomLeft[1] * pixelRatio);\n context.clip();\n rotateAtOffset(context, rotation, width / 2, height / 2);\n};\n\n\n/**\n * @param {module:ol/render/EventType} type Event type.\n * @param {CanvasRenderingContext2D} context Context.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {module:ol/transform~Transform=} opt_transform Transform.\n * @private\n */\nCanvasLayerRenderer.prototype.dispatchComposeEvent_ = function(type, context, frameState, opt_transform) {\n const layer = this.getLayer();\n if (layer.hasListener(type)) {\n const width = frameState.size[0] * frameState.pixelRatio;\n const height = frameState.size[1] * frameState.pixelRatio;\n const rotation = frameState.viewState.rotation;\n rotateAtOffset(context, -rotation, width / 2, height / 2);\n const transform = opt_transform !== undefined ?\n opt_transform : this.getTransform(frameState, 0);\n const render = new CanvasImmediateRenderer(\n context, frameState.pixelRatio, frameState.extent, transform,\n frameState.viewState.rotation);\n const composeEvent = new RenderEvent(type, render, frameState,\n context, null);\n layer.dispatchEvent(composeEvent);\n rotateAtOffset(context, rotation, width / 2, height / 2);\n }\n};\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {module:ol/PluggableMap~FrameState} frameState FrameState.\n * @param {number} hitTolerance Hit tolerance in pixels.\n * @param {function(this: S, module:ol/layer/Layer, (Uint8ClampedArray|Uint8Array)): T} callback Layer\n * callback.\n * @param {S} thisArg Value to use as `this` when executing `callback`.\n * @return {T|undefined} Callback result.\n * @template S,T,U\n */\nCanvasLayerRenderer.prototype.forEachLayerAtCoordinate = function(coordinate, frameState, hitTolerance, callback, thisArg) {\n const hasFeature = this.forEachFeatureAtCoordinate(coordinate, frameState, hitTolerance, TRUE, this);\n\n if (hasFeature) {\n return callback.call(thisArg, this.getLayer(), null);\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {module:ol/layer/Layer~State} layerState Layer state.\n * @param {module:ol/transform~Transform=} opt_transform Transform.\n * @protected\n */\nCanvasLayerRenderer.prototype.postCompose = function(context, frameState, layerState, opt_transform) {\n this.dispatchComposeEvent_(RenderEventType.POSTCOMPOSE, context, frameState, opt_transform);\n};\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {module:ol/transform~Transform=} opt_transform Transform.\n * @protected\n */\nCanvasLayerRenderer.prototype.preCompose = function(context, frameState, opt_transform) {\n this.dispatchComposeEvent_(RenderEventType.PRECOMPOSE, context, frameState, opt_transform);\n};\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {module:ol/transform~Transform=} opt_transform Transform.\n * @protected\n */\nCanvasLayerRenderer.prototype.dispatchRenderEvent = function(context, frameState, opt_transform) {\n this.dispatchComposeEvent_(RenderEventType.RENDER, context, frameState, opt_transform);\n};\n\n\n/**\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {number} offsetX Offset on the x-axis in view coordinates.\n * @protected\n * @return {!module:ol/transform~Transform} Transform.\n */\nCanvasLayerRenderer.prototype.getTransform = function(frameState, offsetX) {\n const viewState = frameState.viewState;\n const pixelRatio = frameState.pixelRatio;\n const dx1 = pixelRatio * frameState.size[0] / 2;\n const dy1 = pixelRatio * frameState.size[1] / 2;\n const sx = pixelRatio / viewState.resolution;\n const sy = -sx;\n const angle = -viewState.rotation;\n const dx2 = -viewState.center[0] + offsetX;\n const dy2 = -viewState.center[1];\n return composeTransform(this.transform_, dx1, dy1, sx, sy, angle, dx2, dy2);\n};\n\n\n/**\n * @abstract\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {module:ol/layer/Layer~State} layerState Layer state.\n * @param {CanvasRenderingContext2D} context Context.\n */\nCanvasLayerRenderer.prototype.composeFrame = function(frameState, layerState, context) {};\n\n/**\n * @abstract\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {module:ol/layer/Layer~State} layerState Layer state.\n * @return {boolean} whether composeFrame should be called.\n */\nCanvasLayerRenderer.prototype.prepareFrame = function(frameState, layerState) {};\nexport default CanvasLayerRenderer;\n","/**\n * @module ol/renderer/canvas/IntermediateCanvas\n */\nimport {inherits} from '../../util.js';\nimport {scale as scaleCoordinate} from '../../coordinate.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {containsExtent, intersects} from '../../extent.js';\nimport {UNDEFINED} from '../../functions.js';\nimport CanvasLayerRenderer from '../canvas/Layer.js';\nimport {create as createTransform, apply as applyTransform} from '../../transform.js';\n\n/**\n * @constructor\n * @abstract\n * @extends {module:ol/renderer/canvas/Layer}\n * @param {module:ol/layer/Layer} layer Layer.\n */\nconst IntermediateCanvasRenderer = function(layer) {\n\n CanvasLayerRenderer.call(this, layer);\n\n /**\n * @protected\n * @type {module:ol/transform~Transform}\n */\n this.coordinateToCanvasPixelTransform = createTransform();\n\n /**\n * @private\n * @type {CanvasRenderingContext2D}\n */\n this.hitCanvasContext_ = null;\n\n};\n\ninherits(IntermediateCanvasRenderer, CanvasLayerRenderer);\n\n\n/**\n * @inheritDoc\n */\nIntermediateCanvasRenderer.prototype.composeFrame = function(frameState, layerState, context) {\n\n this.preCompose(context, frameState);\n\n const image = this.getImage();\n if (image) {\n\n // clipped rendering if layer extent is set\n const extent = layerState.extent;\n const clipped = extent !== undefined &&\n !containsExtent(extent, frameState.extent) &&\n intersects(extent, frameState.extent);\n if (clipped) {\n this.clip(context, frameState, /** @type {module:ol/extent~Extent} */ (extent));\n }\n\n const imageTransform = this.getImageTransform();\n // for performance reasons, context.save / context.restore is not used\n // to save and restore the transformation matrix and the opacity.\n // see http://jsperf.com/context-save-restore-versus-variable\n const alpha = context.globalAlpha;\n context.globalAlpha = layerState.opacity;\n\n // for performance reasons, context.setTransform is only used\n // when the view is rotated. see http://jsperf.com/canvas-transform\n const dx = imageTransform[4];\n const dy = imageTransform[5];\n const dw = image.width * imageTransform[0];\n const dh = image.height * imageTransform[3];\n context.drawImage(image, 0, 0, +image.width, +image.height,\n Math.round(dx), Math.round(dy), Math.round(dw), Math.round(dh));\n context.globalAlpha = alpha;\n\n if (clipped) {\n context.restore();\n }\n }\n\n this.postCompose(context, frameState, layerState);\n};\n\n\n/**\n * @abstract\n * @return {HTMLCanvasElement|HTMLVideoElement|Image} Canvas.\n */\nIntermediateCanvasRenderer.prototype.getImage = function() {};\n\n\n/**\n * @abstract\n * @return {!module:ol/transform~Transform} Image transform.\n */\nIntermediateCanvasRenderer.prototype.getImageTransform = function() {};\n\n\n/**\n * @inheritDoc\n */\nIntermediateCanvasRenderer.prototype.forEachFeatureAtCoordinate = function(coordinate, frameState, hitTolerance, callback, thisArg) {\n const layer = this.getLayer();\n const source = layer.getSource();\n const resolution = frameState.viewState.resolution;\n const rotation = frameState.viewState.rotation;\n const skippedFeatureUids = frameState.skippedFeatureUids;\n return source.forEachFeatureAtCoordinate(\n coordinate, resolution, rotation, hitTolerance, skippedFeatureUids,\n /**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @return {?} Callback result.\n */\n function(feature) {\n return callback.call(thisArg, feature, layer);\n });\n};\n\n\n/**\n * @inheritDoc\n */\nIntermediateCanvasRenderer.prototype.forEachLayerAtCoordinate = function(coordinate, frameState, hitTolerance, callback, thisArg) {\n if (!this.getImage()) {\n return undefined;\n }\n\n if (this.getLayer().getSource().forEachFeatureAtCoordinate !== UNDEFINED) {\n // for ImageCanvas sources use the original hit-detection logic,\n // so that for example also transparent polygons are detected\n return CanvasLayerRenderer.prototype.forEachLayerAtCoordinate.apply(this, arguments);\n } else {\n const pixel = applyTransform(this.coordinateToCanvasPixelTransform, coordinate.slice());\n scaleCoordinate(pixel, frameState.viewState.resolution / this.renderedResolution);\n\n if (!this.hitCanvasContext_) {\n this.hitCanvasContext_ = createCanvasContext2D(1, 1);\n }\n\n this.hitCanvasContext_.clearRect(0, 0, 1, 1);\n this.hitCanvasContext_.drawImage(this.getImage(), pixel[0], pixel[1], 1, 1, 0, 0, 1, 1);\n\n const imageData = this.hitCanvasContext_.getImageData(0, 0, 1, 1).data;\n if (imageData[3] > 0) {\n return callback.call(thisArg, this.getLayer(), imageData);\n } else {\n return undefined;\n }\n }\n};\n\nexport default IntermediateCanvasRenderer;\n","/**\n * @module ol/renderer/canvas/ImageLayer\n */\nimport {ENABLE_RASTER_REPROJECTION} from '../../reproj/common.js';\nimport {inherits} from '../../util.js';\nimport ImageCanvas from '../../ImageCanvas.js';\nimport LayerType from '../../LayerType.js';\nimport ViewHint from '../../ViewHint.js';\nimport {equals} from '../../array.js';\nimport {getHeight, getIntersection, getWidth, isEmpty} from '../../extent.js';\nimport VectorRenderType from '../../layer/VectorRenderType.js';\nimport {assign} from '../../obj.js';\nimport {layerRendererConstructors} from './Map.js';\nimport IntermediateCanvasRenderer from '../canvas/IntermediateCanvas.js';\nimport {create as createTransform, compose as composeTransform} from '../../transform.js';\n\n/**\n * @constructor\n * @extends {module:ol/renderer/canvas/IntermediateCanvas}\n * @param {module:ol/layer/Image|module:ol/layer/Vector} imageLayer Image or vector layer.\n * @api\n */\nconst CanvasImageLayerRenderer = function(imageLayer) {\n\n IntermediateCanvasRenderer.call(this, imageLayer);\n\n /**\n * @private\n * @type {?module:ol/ImageBase}\n */\n this.image_ = null;\n\n /**\n * @private\n * @type {module:ol/transform~Transform}\n */\n this.imageTransform_ = createTransform();\n\n /**\n * @type {!Array.<string>}\n */\n this.skippedFeatures_ = [];\n\n /**\n * @private\n * @type {module:ol/renderer/canvas/VectorLayer}\n */\n this.vectorRenderer_ = null;\n\n if (imageLayer.getType() === LayerType.VECTOR) {\n for (let i = 0, ii = layerRendererConstructors.length; i < ii; ++i) {\n const ctor = layerRendererConstructors[i];\n if (ctor !== CanvasImageLayerRenderer && ctor['handles'](imageLayer)) {\n this.vectorRenderer_ = new ctor(imageLayer);\n break;\n }\n }\n }\n\n};\n\ninherits(CanvasImageLayerRenderer, IntermediateCanvasRenderer);\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {module:ol/layer/Layer} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nCanvasImageLayerRenderer['handles'] = function(layer) {\n return layer.getType() === LayerType.IMAGE ||\n layer.getType() === LayerType.VECTOR &&\n /** @type {module:ol/layer/Vector} */ (layer).getRenderMode() === VectorRenderType.IMAGE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {module:ol/renderer/Map} mapRenderer The map renderer.\n * @param {module:ol/layer/Layer} layer The layer to be rendererd.\n * @return {module:ol/renderer/canvas/ImageLayer} The layer renderer.\n */\nCanvasImageLayerRenderer['create'] = function(mapRenderer, layer) {\n return new CanvasImageLayerRenderer(/** @type {module:ol/layer/Image} */ (layer));\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasImageLayerRenderer.prototype.disposeInternal = function() {\n if (this.vectorRenderer_) {\n this.vectorRenderer_.dispose();\n }\n IntermediateCanvasRenderer.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasImageLayerRenderer.prototype.getImage = function() {\n return !this.image_ ? null : this.image_.getImage();\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasImageLayerRenderer.prototype.getImageTransform = function() {\n return this.imageTransform_;\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasImageLayerRenderer.prototype.prepareFrame = function(frameState, layerState) {\n\n const pixelRatio = frameState.pixelRatio;\n const size = frameState.size;\n const viewState = frameState.viewState;\n const viewCenter = viewState.center;\n const viewResolution = viewState.resolution;\n\n let image;\n const imageLayer = /** @type {module:ol/layer/Image} */ (this.getLayer());\n const imageSource = imageLayer.getSource();\n\n const hints = frameState.viewHints;\n\n const vectorRenderer = this.vectorRenderer_;\n let renderedExtent = frameState.extent;\n if (!vectorRenderer && layerState.extent !== undefined) {\n renderedExtent = getIntersection(renderedExtent, layerState.extent);\n }\n\n if (!hints[ViewHint.ANIMATING] && !hints[ViewHint.INTERACTING] &&\n !isEmpty(renderedExtent)) {\n let projection = viewState.projection;\n if (!ENABLE_RASTER_REPROJECTION) {\n const sourceProjection = imageSource.getProjection();\n if (sourceProjection) {\n projection = sourceProjection;\n }\n }\n let skippedFeatures = this.skippedFeatures_;\n if (vectorRenderer) {\n const context = vectorRenderer.context;\n const imageFrameState = /** @type {module:ol/PluggableMap~FrameState} */ (assign({}, frameState, {\n size: [\n getWidth(renderedExtent) / viewResolution,\n getHeight(renderedExtent) / viewResolution\n ],\n viewState: /** @type {module:ol/View~State} */ (assign({}, frameState.viewState, {\n rotation: 0\n }))\n }));\n const newSkippedFeatures = Object.keys(imageFrameState.skippedFeatureUids).sort();\n image = new ImageCanvas(renderedExtent, viewResolution, pixelRatio, context.canvas, function(callback) {\n if (vectorRenderer.prepareFrame(imageFrameState, layerState) &&\n (vectorRenderer.replayGroupChanged ||\n !equals(skippedFeatures, newSkippedFeatures))) {\n context.canvas.width = imageFrameState.size[0] * pixelRatio;\n context.canvas.height = imageFrameState.size[1] * pixelRatio;\n vectorRenderer.compose(context, imageFrameState, layerState);\n skippedFeatures = newSkippedFeatures;\n callback();\n }\n });\n } else {\n image = imageSource.getImage(\n renderedExtent, viewResolution, pixelRatio, projection);\n }\n if (image && this.loadImage(image)) {\n this.image_ = image;\n this.skippedFeatures_ = skippedFeatures;\n }\n }\n\n if (this.image_) {\n image = this.image_;\n const imageExtent = image.getExtent();\n const imageResolution = image.getResolution();\n const imagePixelRatio = image.getPixelRatio();\n const scale = pixelRatio * imageResolution /\n (viewResolution * imagePixelRatio);\n const transform = composeTransform(this.imageTransform_,\n pixelRatio * size[0] / 2, pixelRatio * size[1] / 2,\n scale, scale,\n 0,\n imagePixelRatio * (imageExtent[0] - viewCenter[0]) / imageResolution,\n imagePixelRatio * (viewCenter[1] - imageExtent[3]) / imageResolution);\n composeTransform(this.coordinateToCanvasPixelTransform,\n pixelRatio * size[0] / 2 - transform[4], pixelRatio * size[1] / 2 - transform[5],\n pixelRatio / viewResolution, -pixelRatio / viewResolution,\n 0,\n -viewCenter[0], -viewCenter[1]);\n\n this.renderedResolution = imageResolution * pixelRatio / imagePixelRatio;\n }\n\n return !!this.image_;\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasImageLayerRenderer.prototype.forEachFeatureAtCoordinate = function(coordinate, frameState, hitTolerance, callback, thisArg) {\n if (this.vectorRenderer_) {\n return this.vectorRenderer_.forEachFeatureAtCoordinate(coordinate, frameState, hitTolerance, callback, thisArg);\n } else {\n return IntermediateCanvasRenderer.prototype.forEachFeatureAtCoordinate.call(this, coordinate, frameState, hitTolerance, callback, thisArg);\n }\n};\n\n\nexport default CanvasImageLayerRenderer;\n","/**\n * @module ol/TileRange\n */\n/**\n * A representation of a contiguous block of tiles. A tile range is specified\n * by its min/max tile coordinates and is inclusive of coordinates.\n *\n * @constructor\n * @param {number} minX Minimum X.\n * @param {number} maxX Maximum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxY Maximum Y.\n * @struct\n */\nconst TileRange = function(minX, maxX, minY, maxY) {\n\n /**\n * @type {number}\n */\n this.minX = minX;\n\n /**\n * @type {number}\n */\n this.maxX = maxX;\n\n /**\n * @type {number}\n */\n this.minY = minY;\n\n /**\n * @type {number}\n */\n this.maxY = maxY;\n\n};\n\n\n/**\n * @param {number} minX Minimum X.\n * @param {number} maxX Maximum X.\n * @param {number} minY Minimum Y.\n * @param {number} maxY Maximum Y.\n * @param {module:ol/TileRange=} tileRange TileRange.\n * @return {module:ol/TileRange} Tile range.\n */\nexport function createOrUpdate(minX, maxX, minY, maxY, tileRange) {\n if (tileRange !== undefined) {\n tileRange.minX = minX;\n tileRange.maxX = maxX;\n tileRange.minY = minY;\n tileRange.maxY = maxY;\n return tileRange;\n } else {\n return new TileRange(minX, maxX, minY, maxY);\n }\n}\n\n\n/**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @return {boolean} Contains tile coordinate.\n */\nTileRange.prototype.contains = function(tileCoord) {\n return this.containsXY(tileCoord[1], tileCoord[2]);\n};\n\n\n/**\n * @param {module:ol/TileRange} tileRange Tile range.\n * @return {boolean} Contains.\n */\nTileRange.prototype.containsTileRange = function(tileRange) {\n return this.minX <= tileRange.minX && tileRange.maxX <= this.maxX &&\n this.minY <= tileRange.minY && tileRange.maxY <= this.maxY;\n};\n\n\n/**\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @return {boolean} Contains coordinate.\n */\nTileRange.prototype.containsXY = function(x, y) {\n return this.minX <= x && x <= this.maxX && this.minY <= y && y <= this.maxY;\n};\n\n\n/**\n * @param {module:ol/TileRange} tileRange Tile range.\n * @return {boolean} Equals.\n */\nTileRange.prototype.equals = function(tileRange) {\n return this.minX == tileRange.minX && this.minY == tileRange.minY &&\n this.maxX == tileRange.maxX && this.maxY == tileRange.maxY;\n};\n\n\n/**\n * @param {module:ol/TileRange} tileRange Tile range.\n */\nTileRange.prototype.extend = function(tileRange) {\n if (tileRange.minX < this.minX) {\n this.minX = tileRange.minX;\n }\n if (tileRange.maxX > this.maxX) {\n this.maxX = tileRange.maxX;\n }\n if (tileRange.minY < this.minY) {\n this.minY = tileRange.minY;\n }\n if (tileRange.maxY > this.maxY) {\n this.maxY = tileRange.maxY;\n }\n};\n\n\n/**\n * @return {number} Height.\n */\nTileRange.prototype.getHeight = function() {\n return this.maxY - this.minY + 1;\n};\n\n\n/**\n * @return {module:ol/size~Size} Size.\n */\nTileRange.prototype.getSize = function() {\n return [this.getWidth(), this.getHeight()];\n};\n\n\n/**\n * @return {number} Width.\n */\nTileRange.prototype.getWidth = function() {\n return this.maxX - this.minX + 1;\n};\n\n\n/**\n * @param {module:ol/TileRange} tileRange Tile range.\n * @return {boolean} Intersects.\n */\nTileRange.prototype.intersects = function(tileRange) {\n return this.minX <= tileRange.maxX &&\n this.maxX >= tileRange.minX &&\n this.minY <= tileRange.maxY &&\n this.maxY >= tileRange.minY;\n};\nexport default TileRange;\n","/**\n * @module ol/renderer/canvas/TileLayer\n */\nimport {getUid, inherits} from '../../util.js';\nimport LayerType from '../../LayerType.js';\nimport TileRange from '../../TileRange.js';\nimport TileState from '../../TileState.js';\nimport ViewHint from '../../ViewHint.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {containsExtent, createEmpty, equals, getIntersection, isEmpty} from '../../extent.js';\nimport IntermediateCanvasRenderer from '../canvas/IntermediateCanvas.js';\nimport {create as createTransform, compose as composeTransform} from '../../transform.js';\n\n/**\n * @constructor\n * @extends {module:ol/renderer/canvas/IntermediateCanvas}\n * @param {module:ol/layer/Tile|module:ol/layer/VectorTile} tileLayer Tile layer.\n * @api\n */\nconst CanvasTileLayerRenderer = function(tileLayer) {\n\n IntermediateCanvasRenderer.call(this, tileLayer);\n\n /**\n * @protected\n * @type {CanvasRenderingContext2D}\n */\n this.context = this.context === null ? null : createCanvasContext2D();\n\n /**\n * @private\n * @type {number}\n */\n this.oversampling_;\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.renderedExtent_ = null;\n\n /**\n * @protected\n * @type {number}\n */\n this.renderedRevision;\n\n /**\n * @protected\n * @type {!Array.<module:ol/Tile>}\n */\n this.renderedTiles = [];\n\n /**\n * @private\n * @type {boolean}\n */\n this.newTiles_ = false;\n\n /**\n * @protected\n * @type {module:ol/extent~Extent}\n */\n this.tmpExtent = createEmpty();\n\n /**\n * @private\n * @type {module:ol/TileRange}\n */\n this.tmpTileRange_ = new TileRange(0, 0, 0, 0);\n\n /**\n * @private\n * @type {module:ol/transform~Transform}\n */\n this.imageTransform_ = createTransform();\n\n /**\n * @protected\n * @type {number}\n */\n this.zDirection = 0;\n\n};\n\ninherits(CanvasTileLayerRenderer, IntermediateCanvasRenderer);\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {module:ol/layer/Layer} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nCanvasTileLayerRenderer['handles'] = function(layer) {\n return layer.getType() === LayerType.TILE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {module:ol/renderer/Map} mapRenderer The map renderer.\n * @param {module:ol/layer/Layer} layer The layer to be rendererd.\n * @return {module:ol/renderer/canvas/TileLayer} The layer renderer.\n */\nCanvasTileLayerRenderer['create'] = function(mapRenderer, layer) {\n return new CanvasTileLayerRenderer(/** @type {module:ol/layer/Tile} */ (layer));\n};\n\n\n/**\n * @private\n * @param {module:ol/Tile} tile Tile.\n * @return {boolean} Tile is drawable.\n */\nCanvasTileLayerRenderer.prototype.isDrawableTile_ = function(tile) {\n const tileState = tile.getState();\n const useInterimTilesOnError = this.getLayer().getUseInterimTilesOnError();\n return tileState == TileState.LOADED ||\n tileState == TileState.EMPTY ||\n tileState == TileState.ERROR && !useInterimTilesOnError;\n};\n\n\n/**\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {!module:ol/Tile} Tile.\n */\nCanvasTileLayerRenderer.prototype.getTile = function(z, x, y, pixelRatio, projection) {\n const layer = this.getLayer();\n const source = /** @type {module:ol/source/Tile} */ (layer.getSource());\n let tile = source.getTile(z, x, y, pixelRatio, projection);\n if (tile.getState() == TileState.ERROR) {\n if (!layer.getUseInterimTilesOnError()) {\n // When useInterimTilesOnError is false, we consider the error tile as loaded.\n tile.setState(TileState.LOADED);\n } else if (layer.getPreload() > 0) {\n // Preloaded tiles for lower resolutions might have finished loading.\n this.newTiles_ = true;\n }\n }\n if (!this.isDrawableTile_(tile)) {\n tile = tile.getInterimTile();\n }\n return tile;\n};\n\n/**\n * @inheritDoc\n */\nCanvasTileLayerRenderer.prototype.prepareFrame = function(frameState, layerState) {\n\n const pixelRatio = frameState.pixelRatio;\n const size = frameState.size;\n const viewState = frameState.viewState;\n const projection = viewState.projection;\n const viewResolution = viewState.resolution;\n const viewCenter = viewState.center;\n\n const tileLayer = this.getLayer();\n const tileSource = /** @type {module:ol/source/Tile} */ (tileLayer.getSource());\n const sourceRevision = tileSource.getRevision();\n const tileGrid = tileSource.getTileGridForProjection(projection);\n const z = tileGrid.getZForResolution(viewResolution, this.zDirection);\n const tileResolution = tileGrid.getResolution(z);\n let oversampling = Math.round(viewResolution / tileResolution) || 1;\n let extent = frameState.extent;\n\n if (layerState.extent !== undefined) {\n extent = getIntersection(extent, layerState.extent);\n }\n if (isEmpty(extent)) {\n // Return false to prevent the rendering of the layer.\n return false;\n }\n\n const tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n const imageExtent = tileGrid.getTileRangeExtent(z, tileRange);\n\n const tilePixelRatio = tileSource.getTilePixelRatio(pixelRatio);\n\n /**\n * @type {Object.<number, Object.<string, module:ol/Tile>>}\n */\n const tilesToDrawByZ = {};\n tilesToDrawByZ[z] = {};\n\n const findLoadedTiles = this.createLoadedTileFinder(\n tileSource, projection, tilesToDrawByZ);\n\n const hints = frameState.viewHints;\n const animatingOrInteracting = hints[ViewHint.ANIMATING] || hints[ViewHint.INTERACTING];\n\n const tmpExtent = this.tmpExtent;\n const tmpTileRange = this.tmpTileRange_;\n this.newTiles_ = false;\n let tile, x, y;\n for (x = tileRange.minX; x <= tileRange.maxX; ++x) {\n for (y = tileRange.minY; y <= tileRange.maxY; ++y) {\n if (Date.now() - frameState.time > 16 && animatingOrInteracting) {\n continue;\n }\n tile = this.getTile(z, x, y, pixelRatio, projection);\n if (this.isDrawableTile_(tile)) {\n const uid = getUid(this);\n if (tile.getState() == TileState.LOADED) {\n tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;\n const inTransition = tile.inTransition(uid);\n if (!this.newTiles_ && (inTransition || this.renderedTiles.indexOf(tile) === -1)) {\n this.newTiles_ = true;\n }\n }\n if (tile.getAlpha(uid, frameState.time) === 1) {\n // don't look for alt tiles if alpha is 1\n continue;\n }\n }\n\n const childTileRange = tileGrid.getTileCoordChildTileRange(\n tile.tileCoord, tmpTileRange, tmpExtent);\n let covered = false;\n if (childTileRange) {\n covered = findLoadedTiles(z + 1, childTileRange);\n }\n if (!covered) {\n tileGrid.forEachTileCoordParentTileRange(\n tile.tileCoord, findLoadedTiles, null, tmpTileRange, tmpExtent);\n }\n\n }\n }\n\n const renderedResolution = tileResolution * pixelRatio / tilePixelRatio * oversampling;\n if (!(this.renderedResolution && Date.now() - frameState.time > 16 && animatingOrInteracting) && (\n this.newTiles_ ||\n !(this.renderedExtent_ && containsExtent(this.renderedExtent_, extent)) ||\n this.renderedRevision != sourceRevision ||\n oversampling != this.oversampling_ ||\n !animatingOrInteracting && renderedResolution != this.renderedResolution\n )) {\n\n const context = this.context;\n if (context) {\n const tilePixelSize = tileSource.getTilePixelSize(z, pixelRatio, projection);\n const width = Math.round(tileRange.getWidth() * tilePixelSize[0] / oversampling);\n const height = Math.round(tileRange.getHeight() * tilePixelSize[1] / oversampling);\n const canvas = context.canvas;\n if (canvas.width != width || canvas.height != height) {\n this.oversampling_ = oversampling;\n canvas.width = width;\n canvas.height = height;\n } else {\n if (this.renderedExtent_ && !equals(imageExtent, this.renderedExtent_)) {\n context.clearRect(0, 0, width, height);\n }\n oversampling = this.oversampling_;\n }\n }\n\n this.renderedTiles.length = 0;\n /** @type {Array.<number>} */\n const zs = Object.keys(tilesToDrawByZ).map(Number);\n zs.sort(function(a, b) {\n if (a === z) {\n return 1;\n } else if (b === z) {\n return -1;\n } else {\n return a > b ? 1 : a < b ? -1 : 0;\n }\n });\n let currentResolution, currentScale, currentTilePixelSize, currentZ, i, ii;\n let tileExtent, tileGutter, tilesToDraw, w, h;\n for (i = 0, ii = zs.length; i < ii; ++i) {\n currentZ = zs[i];\n currentTilePixelSize = tileSource.getTilePixelSize(currentZ, pixelRatio, projection);\n currentResolution = tileGrid.getResolution(currentZ);\n currentScale = currentResolution / tileResolution;\n tileGutter = tilePixelRatio * tileSource.getGutter(projection);\n tilesToDraw = tilesToDrawByZ[currentZ];\n for (const tileCoordKey in tilesToDraw) {\n tile = tilesToDraw[tileCoordKey];\n tileExtent = tileGrid.getTileCoordExtent(tile.getTileCoord(), tmpExtent);\n x = (tileExtent[0] - imageExtent[0]) / tileResolution * tilePixelRatio / oversampling;\n y = (imageExtent[3] - tileExtent[3]) / tileResolution * tilePixelRatio / oversampling;\n w = currentTilePixelSize[0] * currentScale / oversampling;\n h = currentTilePixelSize[1] * currentScale / oversampling;\n this.drawTileImage(tile, frameState, layerState, x, y, w, h, tileGutter, z === currentZ);\n this.renderedTiles.push(tile);\n }\n }\n\n this.renderedRevision = sourceRevision;\n this.renderedResolution = tileResolution * pixelRatio / tilePixelRatio * oversampling;\n this.renderedExtent_ = imageExtent;\n }\n\n const scale = this.renderedResolution / viewResolution;\n const transform = composeTransform(this.imageTransform_,\n pixelRatio * size[0] / 2, pixelRatio * size[1] / 2,\n scale, scale,\n 0,\n (this.renderedExtent_[0] - viewCenter[0]) / this.renderedResolution * pixelRatio,\n (viewCenter[1] - this.renderedExtent_[3]) / this.renderedResolution * pixelRatio);\n composeTransform(this.coordinateToCanvasPixelTransform,\n pixelRatio * size[0] / 2 - transform[4], pixelRatio * size[1] / 2 - transform[5],\n pixelRatio / viewResolution, -pixelRatio / viewResolution,\n 0,\n -viewCenter[0], -viewCenter[1]);\n\n\n this.updateUsedTiles(frameState.usedTiles, tileSource, z, tileRange);\n this.manageTilePyramid(frameState, tileSource, tileGrid, pixelRatio,\n projection, extent, z, tileLayer.getPreload());\n this.scheduleExpireCache(frameState, tileSource);\n\n return this.renderedTiles.length > 0;\n};\n\n\n/**\n * @param {module:ol/Tile} tile Tile.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {module:ol/layer/Layer~State} layerState Layer state.\n * @param {number} x Left of the tile.\n * @param {number} y Top of the tile.\n * @param {number} w Width of the tile.\n * @param {number} h Height of the tile.\n * @param {number} gutter Tile gutter.\n * @param {boolean} transition Apply an alpha transition.\n */\nCanvasTileLayerRenderer.prototype.drawTileImage = function(tile, frameState, layerState, x, y, w, h, gutter, transition) {\n const image = tile.getImage(this.getLayer());\n if (!image) {\n return;\n }\n const uid = getUid(this);\n const alpha = transition ? tile.getAlpha(uid, frameState.time) : 1;\n if (alpha === 1 && !this.getLayer().getSource().getOpaque(frameState.viewState.projection)) {\n this.context.clearRect(x, y, w, h);\n }\n const alphaChanged = alpha !== this.context.globalAlpha;\n if (alphaChanged) {\n this.context.save();\n this.context.globalAlpha = alpha;\n }\n this.context.drawImage(image, gutter, gutter,\n image.width - 2 * gutter, image.height - 2 * gutter, x, y, w, h);\n\n if (alphaChanged) {\n this.context.restore();\n }\n if (alpha !== 1) {\n frameState.animate = true;\n } else if (transition) {\n tile.endTransition(uid);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasTileLayerRenderer.prototype.getImage = function() {\n const context = this.context;\n return context ? context.canvas : null;\n};\n\n\n/**\n * @function\n * @return {module:ol/layer/Tile|module:ol/layer/VectorTile}\n */\nCanvasTileLayerRenderer.prototype.getLayer;\n\n\n/**\n * @inheritDoc\n */\nCanvasTileLayerRenderer.prototype.getImageTransform = function() {\n return this.imageTransform_;\n};\nexport default CanvasTileLayerRenderer;\n","/**\n * @module ol/render/ReplayGroup\n */\n/**\n * Base class for replay groups.\n * @constructor\n * @abstract\n */\nconst ReplayGroup = function() {};\n\n\n/**\n * @abstract\n * @param {number|undefined} zIndex Z index.\n * @param {module:ol/render/ReplayType} replayType Replay type.\n * @return {module:ol/render/VectorContext} Replay.\n */\nReplayGroup.prototype.getReplay = function(zIndex, replayType) {};\n\n\n/**\n * @abstract\n * @return {boolean} Is empty.\n */\nReplayGroup.prototype.isEmpty = function() {};\nexport default ReplayGroup;\n","/**\n * @module ol/render/ReplayType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n CIRCLE: 'Circle',\n DEFAULT: 'Default',\n IMAGE: 'Image',\n LINE_STRING: 'LineString',\n POLYGON: 'Polygon',\n TEXT: 'Text'\n};\n","/**\n * @module ol/geom/flat/textpath\n */\nimport {lerp} from '../../math.js';\n\n\n/**\n * @param {Array.<number>} flatCoordinates Path to put text on.\n * @param {number} offset Start offset of the `flatCoordinates`.\n * @param {number} end End offset of the `flatCoordinates`.\n * @param {number} stride Stride.\n * @param {string} text Text to place on the path.\n * @param {function(string):number} measure Measure function returning the\n * width of the character passed as 1st argument.\n * @param {number} startM m along the path where the text starts.\n * @param {number} maxAngle Max angle between adjacent chars in radians.\n * @return {Array.<Array.<*>>} The result array of null if `maxAngle` was\n * exceeded. Entries of the array are x, y, anchorX, angle, chunk.\n */\nexport function drawTextOnPath(\n flatCoordinates, offset, end, stride, text, measure, startM, maxAngle) {\n const result = [];\n\n // Keep text upright\n const reverse = flatCoordinates[offset] > flatCoordinates[end - stride];\n\n const numChars = text.length;\n\n let x1 = flatCoordinates[offset];\n let y1 = flatCoordinates[offset + 1];\n offset += stride;\n let x2 = flatCoordinates[offset];\n let y2 = flatCoordinates[offset + 1];\n let segmentM = 0;\n let segmentLength = Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2));\n\n let chunk = '';\n let chunkLength = 0;\n let data, index, previousAngle;\n for (let i = 0; i < numChars; ++i) {\n index = reverse ? numChars - i - 1 : i;\n const char = text.charAt(index);\n chunk = reverse ? char + chunk : chunk + char;\n const charLength = measure(chunk) - chunkLength;\n chunkLength += charLength;\n const charM = startM + charLength / 2;\n while (offset < end - stride && segmentM + segmentLength < charM) {\n x1 = x2;\n y1 = y2;\n offset += stride;\n x2 = flatCoordinates[offset];\n y2 = flatCoordinates[offset + 1];\n segmentM += segmentLength;\n segmentLength = Math.sqrt(Math.pow(x2 - x1, 2) + Math.pow(y2 - y1, 2));\n }\n const segmentPos = charM - segmentM;\n let angle = Math.atan2(y2 - y1, x2 - x1);\n if (reverse) {\n angle += angle > 0 ? -Math.PI : Math.PI;\n }\n if (previousAngle !== undefined) {\n let delta = angle - previousAngle;\n delta += (delta > Math.PI) ? -2 * Math.PI : (delta < -Math.PI) ? 2 * Math.PI : 0;\n if (Math.abs(delta) > maxAngle) {\n return null;\n }\n }\n const interpolate = segmentPos / segmentLength;\n const x = lerp(x1, x2, interpolate);\n const y = lerp(y1, y2, interpolate);\n if (previousAngle == angle) {\n if (reverse) {\n data[0] = x;\n data[1] = y;\n data[2] = charLength / 2;\n }\n data[4] = chunk;\n } else {\n chunk = char;\n chunkLength = charLength;\n data = [x, y, charLength / 2, angle, chunk];\n if (reverse) {\n result.unshift(data);\n } else {\n result.push(data);\n }\n previousAngle = angle;\n }\n startM += charLength;\n }\n return result;\n}\n","/**\n * @module ol/render/canvas/Instruction\n */\n\n/**\n * @enum {number}\n */\nconst Instruction = {\n BEGIN_GEOMETRY: 0,\n BEGIN_PATH: 1,\n CIRCLE: 2,\n CLOSE_PATH: 3,\n CUSTOM: 4,\n DRAW_CHARS: 5,\n DRAW_IMAGE: 6,\n END_GEOMETRY: 7,\n FILL: 8,\n MOVE_TO_LINE_TO: 9,\n SET_FILL_STYLE: 10,\n SET_STROKE_STYLE: 11,\n STROKE: 12\n};\n\n\n/**\n * @type {Array.<Instruction>}\n */\nexport const fillInstruction = [Instruction.FILL];\n\n\n/**\n * @type {Array.<Instruction>}\n */\nexport const strokeInstruction = [Instruction.STROKE];\n\n\n/**\n * @type {Array.<Instruction>}\n */\nexport const beginPathInstruction = [Instruction.BEGIN_PATH];\n\n\n/**\n * @type {Array.<Instruction>}\n */\nexport const closePathInstruction = [Instruction.CLOSE_PATH];\n\n\nexport default Instruction;\n","/**\n * @module ol/render/replay\n */\nimport ReplayType from '../render/ReplayType.js';\n\n\n/**\n * @const\n * @type {Array.<module:ol/render/ReplayType>}\n */\nexport const ORDER = [\n ReplayType.POLYGON,\n ReplayType.CIRCLE,\n ReplayType.LINE_STRING,\n ReplayType.IMAGE,\n ReplayType.TEXT,\n ReplayType.DEFAULT\n];\n\n/**\n * @const\n * @enum {number}\n */\nexport const TEXT_ALIGN = {};\nTEXT_ALIGN['left'] = 0;\nTEXT_ALIGN['end'] = 0;\nTEXT_ALIGN['center'] = 0.5;\nTEXT_ALIGN['right'] = 1;\nTEXT_ALIGN['start'] = 1;\nTEXT_ALIGN['top'] = 0;\nTEXT_ALIGN['middle'] = 0.5;\nTEXT_ALIGN['hanging'] = 0.2;\nTEXT_ALIGN['alphabetic'] = 0.8;\nTEXT_ALIGN['ideographic'] = 0.8;\nTEXT_ALIGN['bottom'] = 1;\n","/**\n * @module ol/render/canvas/Replay\n */\nimport {getUid, inherits} from '../../util.js';\nimport {UNDEFINED} from '../../functions.js';\nimport {equals, reverseSubArray} from '../../array.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {buffer, clone, coordinateRelationship, createEmpty, createOrUpdate,\n createOrUpdateEmpty, extend, extendCoordinate, intersects} from '../../extent.js';\nimport Relationship from '../../extent/Relationship.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport {inflateCoordinates, inflateCoordinatesArray, inflateMultiCoordinatesArray} from '../../geom/flat/inflate.js';\nimport {lineStringLength} from '../../geom/flat/length.js';\nimport {drawTextOnPath} from '../../geom/flat/textpath.js';\nimport {transform2D} from '../../geom/flat/transform.js';\nimport {CANVAS_LINE_DASH} from '../../has.js';\nimport {isEmpty} from '../../obj.js';\nimport VectorContext from '../VectorContext.js';\nimport {drawImage, resetTransform, defaultPadding, defaultFillStyle, defaultStrokeStyle,\n defaultMiterLimit, defaultLineWidth, defaultLineJoin, defaultLineDashOffset,\n defaultLineDash, defaultLineCap} from '../canvas.js';\nimport CanvasInstruction from '../canvas/Instruction.js';\nimport {TEXT_ALIGN} from '../replay.js';\nimport {\n create as createTransform,\n compose as composeTransform,\n apply as applyTransform,\n setFromArray as transformSetFromArray\n} from '../../transform.js';\n\n/**\n * @constructor\n * @extends {module:ol/render/VectorContext}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Maximum extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {boolean} overlaps The replay can have overlapping geometries.\n * @param {?} declutterTree Declutter tree.\n * @struct\n */\nconst CanvasReplay = function(tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n VectorContext.call(this);\n\n /**\n * @type {?}\n */\n this.declutterTree = declutterTree;\n\n /**\n * @protected\n * @type {number}\n */\n this.tolerance = tolerance;\n\n /**\n * @protected\n * @const\n * @type {module:ol/extent~Extent}\n */\n this.maxExtent = maxExtent;\n\n /**\n * @protected\n * @type {boolean}\n */\n this.overlaps = overlaps;\n\n /**\n * @protected\n * @type {number}\n */\n this.pixelRatio = pixelRatio;\n\n /**\n * @protected\n * @type {number}\n */\n this.maxLineWidth = 0;\n\n /**\n * @protected\n * @const\n * @type {number}\n */\n this.resolution = resolution;\n\n /**\n * @private\n * @type {boolean}\n */\n this.alignFill_;\n\n /**\n * @private\n * @type {Array.<*>}\n */\n this.beginGeometryInstruction1_ = null;\n\n /**\n * @private\n * @type {Array.<*>}\n */\n this.beginGeometryInstruction2_ = null;\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.bufferedMaxExtent_ = null;\n\n /**\n * @protected\n * @type {Array.<*>}\n */\n this.instructions = [];\n\n /**\n * @protected\n * @type {Array.<number>}\n */\n this.coordinates = [];\n\n /**\n * @private\n * @type {!Object.<number,module:ol/coordinate~Coordinate|Array.<module:ol/coordinate~Coordinate>|Array.<Array.<module:ol/coordinate~Coordinate>>>}\n */\n this.coordinateCache_ = {};\n\n /**\n * @private\n * @type {!module:ol/transform~Transform}\n */\n this.renderedTransform_ = createTransform();\n\n /**\n * @protected\n * @type {Array.<*>}\n */\n this.hitDetectionInstructions = [];\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.pixelCoordinates_ = null;\n\n /**\n * @protected\n * @type {module:ol/render/canvas~FillStrokeState}\n */\n this.state = /** @type {module:ol/render/canvas~FillStrokeState} */ ({});\n\n /**\n * @private\n * @type {number}\n */\n this.viewRotation_ = 0;\n\n};\n\ninherits(CanvasReplay, VectorContext);\n\n\n/**\n * @type {module:ol/extent~Extent}\n */\nconst tmpExtent = createEmpty();\n\n\n/**\n * @type {!module:ol/transform~Transform}\n */\nconst tmpTransform = createTransform();\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {module:ol/coordinate~Coordinate} p1 1st point of the background box.\n * @param {module:ol/coordinate~Coordinate} p2 2nd point of the background box.\n * @param {module:ol/coordinate~Coordinate} p3 3rd point of the background box.\n * @param {module:ol/coordinate~Coordinate} p4 4th point of the background box.\n * @param {Array.<*>} fillInstruction Fill instruction.\n * @param {Array.<*>} strokeInstruction Stroke instruction.\n */\nCanvasReplay.prototype.replayTextBackground_ = function(context, p1, p2, p3, p4,\n fillInstruction, strokeInstruction) {\n context.beginPath();\n context.moveTo.apply(context, p1);\n context.lineTo.apply(context, p2);\n context.lineTo.apply(context, p3);\n context.lineTo.apply(context, p4);\n context.lineTo.apply(context, p1);\n if (fillInstruction) {\n this.alignFill_ = /** @type {boolean} */ (fillInstruction[2]);\n this.fill_(context);\n }\n if (strokeInstruction) {\n this.setStrokeStyle_(context, /** @type {Array.<*>} */ (strokeInstruction));\n context.stroke();\n }\n};\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {HTMLImageElement|HTMLCanvasElement|HTMLVideoElement} image Image.\n * @param {number} anchorX Anchor X.\n * @param {number} anchorY Anchor Y.\n * @param {module:ol/render/canvas~DeclutterGroup} declutterGroup Declutter group.\n * @param {number} height Height.\n * @param {number} opacity Opacity.\n * @param {number} originX Origin X.\n * @param {number} originY Origin Y.\n * @param {number} rotation Rotation.\n * @param {number} scale Scale.\n * @param {boolean} snapToPixel Snap to pixel.\n * @param {number} width Width.\n * @param {Array.<number>} padding Padding.\n * @param {Array.<*>} fillInstruction Fill instruction.\n * @param {Array.<*>} strokeInstruction Stroke instruction.\n */\nCanvasReplay.prototype.replayImage_ = function(context, x, y, image,\n anchorX, anchorY, declutterGroup, height, opacity, originX, originY,\n rotation, scale, snapToPixel, width, padding, fillInstruction, strokeInstruction) {\n const fillStroke = fillInstruction || strokeInstruction;\n anchorX *= scale;\n anchorY *= scale;\n x -= anchorX;\n y -= anchorY;\n\n const w = (width + originX > image.width) ? image.width - originX : width;\n const h = (height + originY > image.height) ? image.height - originY : height;\n const boxW = padding[3] + w * scale + padding[1];\n const boxH = padding[0] + h * scale + padding[2];\n const boxX = x - padding[3];\n const boxY = y - padding[0];\n\n /** @type {module:ol/coordinate~Coordinate} */\n let p1;\n /** @type {module:ol/coordinate~Coordinate} */\n let p2;\n /** @type {module:ol/coordinate~Coordinate} */\n let p3;\n /** @type {module:ol/coordinate~Coordinate} */\n let p4;\n if (fillStroke || rotation !== 0) {\n p1 = [boxX, boxY];\n p2 = [boxX + boxW, boxY];\n p3 = [boxX + boxW, boxY + boxH];\n p4 = [boxX, boxY + boxH];\n }\n\n let transform = null;\n if (rotation !== 0) {\n const centerX = x + anchorX;\n const centerY = y + anchorY;\n transform = composeTransform(tmpTransform, centerX, centerY, 1, 1, rotation, -centerX, -centerY);\n\n createOrUpdateEmpty(tmpExtent);\n extendCoordinate(tmpExtent, applyTransform(tmpTransform, p1));\n extendCoordinate(tmpExtent, applyTransform(tmpTransform, p2));\n extendCoordinate(tmpExtent, applyTransform(tmpTransform, p3));\n extendCoordinate(tmpExtent, applyTransform(tmpTransform, p4));\n } else {\n createOrUpdate(boxX, boxY, boxX + boxW, boxY + boxH, tmpExtent);\n }\n const canvas = context.canvas;\n const strokePadding = strokeInstruction ? (strokeInstruction[2] * scale / 2) : 0;\n const intersects =\n tmpExtent[0] - strokePadding <= canvas.width && tmpExtent[2] + strokePadding >= 0 &&\n tmpExtent[1] - strokePadding <= canvas.height && tmpExtent[3] + strokePadding >= 0;\n\n if (snapToPixel) {\n x = Math.round(x);\n y = Math.round(y);\n }\n\n if (declutterGroup) {\n if (!intersects && declutterGroup[4] == 1) {\n return;\n }\n extend(declutterGroup, tmpExtent);\n const declutterArgs = intersects ?\n [context, transform ? transform.slice(0) : null, opacity, image, originX, originY, w, h, x, y, scale] :\n null;\n if (declutterArgs && fillStroke) {\n declutterArgs.push(fillInstruction, strokeInstruction, p1, p2, p3, p4);\n }\n declutterGroup.push(declutterArgs);\n } else if (intersects) {\n if (fillStroke) {\n this.replayTextBackground_(context, p1, p2, p3, p4,\n /** @type {Array.<*>} */ (fillInstruction),\n /** @type {Array.<*>} */ (strokeInstruction));\n }\n drawImage(context, transform, opacity, image, originX, originY, w, h, x, y, scale);\n }\n};\n\n\n/**\n * @protected\n * @param {Array.<number>} dashArray Dash array.\n * @return {Array.<number>} Dash array with pixel ratio applied\n */\nCanvasReplay.prototype.applyPixelRatio = function(dashArray) {\n const pixelRatio = this.pixelRatio;\n return pixelRatio == 1 ? dashArray : dashArray.map(function(dash) {\n return dash * pixelRatio;\n });\n};\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {boolean} closed Last input coordinate equals first.\n * @param {boolean} skipFirst Skip first coordinate.\n * @protected\n * @return {number} My end.\n */\nCanvasReplay.prototype.appendFlatCoordinates = function(flatCoordinates, offset, end, stride, closed, skipFirst) {\n\n let myEnd = this.coordinates.length;\n const extent = this.getBufferedMaxExtent();\n if (skipFirst) {\n offset += stride;\n }\n const lastCoord = [flatCoordinates[offset], flatCoordinates[offset + 1]];\n const nextCoord = [NaN, NaN];\n let skipped = true;\n\n let i, lastRel, nextRel;\n for (i = offset + stride; i < end; i += stride) {\n nextCoord[0] = flatCoordinates[i];\n nextCoord[1] = flatCoordinates[i + 1];\n nextRel = coordinateRelationship(extent, nextCoord);\n if (nextRel !== lastRel) {\n if (skipped) {\n this.coordinates[myEnd++] = lastCoord[0];\n this.coordinates[myEnd++] = lastCoord[1];\n }\n this.coordinates[myEnd++] = nextCoord[0];\n this.coordinates[myEnd++] = nextCoord[1];\n skipped = false;\n } else if (nextRel === Relationship.INTERSECTING) {\n this.coordinates[myEnd++] = nextCoord[0];\n this.coordinates[myEnd++] = nextCoord[1];\n skipped = false;\n } else {\n skipped = true;\n }\n lastCoord[0] = nextCoord[0];\n lastCoord[1] = nextCoord[1];\n lastRel = nextRel;\n }\n\n // Last coordinate equals first or only one point to append:\n if ((closed && skipped) || i === offset + stride) {\n this.coordinates[myEnd++] = lastCoord[0];\n this.coordinates[myEnd++] = lastCoord[1];\n }\n return myEnd;\n};\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @param {Array.<number>} replayEnds Replay ends.\n * @return {number} Offset.\n */\nCanvasReplay.prototype.drawCustomCoordinates_ = function(flatCoordinates, offset, ends, stride, replayEnds) {\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const replayEnd = this.appendFlatCoordinates(flatCoordinates, offset, end, stride, false, false);\n replayEnds.push(replayEnd);\n offset = end;\n }\n return offset;\n};\n\n\n/**\n * @inheritDoc.\n */\nCanvasReplay.prototype.drawCustom = function(geometry, feature, renderer) {\n this.beginGeometry(geometry, feature);\n const type = geometry.getType();\n const stride = geometry.getStride();\n const replayBegin = this.coordinates.length;\n let flatCoordinates, replayEnd, replayEnds, replayEndss;\n let offset;\n if (type == GeometryType.MULTI_POLYGON) {\n geometry = /** @type {module:ol/geom/MultiPolygon} */ (geometry);\n flatCoordinates = geometry.getOrientedFlatCoordinates();\n replayEndss = [];\n const endss = geometry.getEndss();\n offset = 0;\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n const myEnds = [];\n offset = this.drawCustomCoordinates_(flatCoordinates, offset, endss[i], stride, myEnds);\n replayEndss.push(myEnds);\n }\n this.instructions.push([CanvasInstruction.CUSTOM,\n replayBegin, replayEndss, geometry, renderer, inflateMultiCoordinatesArray]);\n } else if (type == GeometryType.POLYGON || type == GeometryType.MULTI_LINE_STRING) {\n replayEnds = [];\n flatCoordinates = (type == GeometryType.POLYGON) ?\n /** @type {module:ol/geom/Polygon} */ (geometry).getOrientedFlatCoordinates() :\n geometry.getFlatCoordinates();\n offset = this.drawCustomCoordinates_(flatCoordinates, 0,\n /** @type {module:ol/geom/Polygon|module:ol/geom/MultiLineString} */ (geometry).getEnds(),\n stride, replayEnds);\n this.instructions.push([CanvasInstruction.CUSTOM,\n replayBegin, replayEnds, geometry, renderer, inflateCoordinatesArray]);\n } else if (type == GeometryType.LINE_STRING || type == GeometryType.MULTI_POINT) {\n flatCoordinates = geometry.getFlatCoordinates();\n replayEnd = this.appendFlatCoordinates(\n flatCoordinates, 0, flatCoordinates.length, stride, false, false);\n this.instructions.push([CanvasInstruction.CUSTOM,\n replayBegin, replayEnd, geometry, renderer, inflateCoordinates]);\n } else if (type == GeometryType.POINT) {\n flatCoordinates = geometry.getFlatCoordinates();\n this.coordinates.push(flatCoordinates[0], flatCoordinates[1]);\n replayEnd = this.coordinates.length;\n this.instructions.push([CanvasInstruction.CUSTOM,\n replayBegin, replayEnd, geometry, renderer]);\n }\n this.endGeometry(geometry, feature);\n};\n\n\n/**\n * @protected\n * @param {module:ol/geom/Geometry|module:ol/render/Feature} geometry Geometry.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nCanvasReplay.prototype.beginGeometry = function(geometry, feature) {\n this.beginGeometryInstruction1_ = [CanvasInstruction.BEGIN_GEOMETRY, feature, 0];\n this.instructions.push(this.beginGeometryInstruction1_);\n this.beginGeometryInstruction2_ = [CanvasInstruction.BEGIN_GEOMETRY, feature, 0];\n this.hitDetectionInstructions.push(this.beginGeometryInstruction2_);\n};\n\n\n/**\n * @private\n * @param {CanvasRenderingContext2D} context Context.\n */\nCanvasReplay.prototype.fill_ = function(context) {\n if (this.alignFill_) {\n const origin = applyTransform(this.renderedTransform_, [0, 0]);\n const repeatSize = 512 * this.pixelRatio;\n context.translate(origin[0] % repeatSize, origin[1] % repeatSize);\n context.rotate(this.viewRotation_);\n }\n context.fill();\n if (this.alignFill_) {\n context.setTransform.apply(context, resetTransform);\n }\n};\n\n\n/**\n * @private\n * @param {CanvasRenderingContext2D} context Context.\n * @param {Array.<*>} instruction Instruction.\n */\nCanvasReplay.prototype.setStrokeStyle_ = function(context, instruction) {\n context.strokeStyle = /** @type {module:ol/colorlike~ColorLike} */ (instruction[1]);\n context.lineWidth = /** @type {number} */ (instruction[2]);\n context.lineCap = /** @type {string} */ (instruction[3]);\n context.lineJoin = /** @type {string} */ (instruction[4]);\n context.miterLimit = /** @type {number} */ (instruction[5]);\n if (CANVAS_LINE_DASH) {\n context.lineDashOffset = /** @type {number} */ (instruction[7]);\n context.setLineDash(/** @type {Array.<number>} */ (instruction[6]));\n }\n};\n\n\n/**\n * @param {module:ol/render/canvas~DeclutterGroup} declutterGroup Declutter group.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nCanvasReplay.prototype.renderDeclutter_ = function(declutterGroup, feature) {\n if (declutterGroup && declutterGroup.length > 5) {\n const groupCount = declutterGroup[4];\n if (groupCount == 1 || groupCount == declutterGroup.length - 5) {\n /** @type {module:ol/structs/RBush~Entry} */\n const box = {\n minX: /** @type {number} */ (declutterGroup[0]),\n minY: /** @type {number} */ (declutterGroup[1]),\n maxX: /** @type {number} */ (declutterGroup[2]),\n maxY: /** @type {number} */ (declutterGroup[3]),\n value: feature\n };\n if (!this.declutterTree.collides(box)) {\n this.declutterTree.insert(box);\n for (let j = 5, jj = declutterGroup.length; j < jj; ++j) {\n const declutterData = /** @type {Array} */ (declutterGroup[j]);\n if (declutterData) {\n if (declutterData.length > 11) {\n this.replayTextBackground_(declutterData[0],\n declutterData[13], declutterData[14], declutterData[15], declutterData[16],\n declutterData[11], declutterData[12]);\n }\n drawImage.apply(undefined, declutterData);\n }\n }\n }\n declutterGroup.length = 5;\n createOrUpdateEmpty(declutterGroup);\n }\n }\n};\n\n\n/**\n * @private\n * @param {CanvasRenderingContext2D} context Context.\n * @param {module:ol/transform~Transform} transform Transform.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features\n * to skip.\n * @param {Array.<*>} instructions Instructions array.\n * @param {function((module:ol/Feature|module:ol/render/Feature)): T|undefined}\n * featureCallback Feature callback.\n * @param {module:ol/extent~Extent=} opt_hitExtent Only check features that intersect this\n * extent.\n * @return {T|undefined} Callback result.\n * @template T\n */\nCanvasReplay.prototype.replay_ = function(\n context, transform, skippedFeaturesHash,\n instructions, featureCallback, opt_hitExtent) {\n /** @type {Array.<number>} */\n let pixelCoordinates;\n if (this.pixelCoordinates_ && equals(transform, this.renderedTransform_)) {\n pixelCoordinates = this.pixelCoordinates_;\n } else {\n if (!this.pixelCoordinates_) {\n this.pixelCoordinates_ = [];\n }\n pixelCoordinates = transform2D(\n this.coordinates, 0, this.coordinates.length, 2,\n transform, this.pixelCoordinates_);\n transformSetFromArray(this.renderedTransform_, transform);\n }\n const skipFeatures = !isEmpty(skippedFeaturesHash);\n let i = 0; // instruction index\n const ii = instructions.length; // end of instructions\n let d = 0; // data index\n let dd; // end of per-instruction data\n let anchorX, anchorY, prevX, prevY, roundX, roundY, declutterGroup, image;\n let pendingFill = 0;\n let pendingStroke = 0;\n let lastFillInstruction = null;\n let lastStrokeInstruction = null;\n const coordinateCache = this.coordinateCache_;\n const viewRotation = this.viewRotation_;\n\n const state = /** @type {module:ol/render~State} */ ({\n context: context,\n pixelRatio: this.pixelRatio,\n resolution: this.resolution,\n rotation: viewRotation\n });\n\n // When the batch size gets too big, performance decreases. 200 is a good\n // balance between batch size and number of fill/stroke instructions.\n const batchSize = this.instructions != instructions || this.overlaps ? 0 : 200;\n let /** @type {module:ol/Feature|module:ol/render/Feature} */ feature;\n let x, y;\n while (i < ii) {\n const instruction = instructions[i];\n const type = /** @type {module:ol/render/canvas/Instruction} */ (instruction[0]);\n switch (type) {\n case CanvasInstruction.BEGIN_GEOMETRY:\n feature = /** @type {module:ol/Feature|module:ol/render/Feature} */ (instruction[1]);\n if ((skipFeatures &&\n skippedFeaturesHash[getUid(feature).toString()]) ||\n !feature.getGeometry()) {\n i = /** @type {number} */ (instruction[2]);\n } else if (opt_hitExtent !== undefined && !intersects(\n opt_hitExtent, feature.getGeometry().getExtent())) {\n i = /** @type {number} */ (instruction[2]) + 1;\n } else {\n ++i;\n }\n break;\n case CanvasInstruction.BEGIN_PATH:\n if (pendingFill > batchSize) {\n this.fill_(context);\n pendingFill = 0;\n }\n if (pendingStroke > batchSize) {\n context.stroke();\n pendingStroke = 0;\n }\n if (!pendingFill && !pendingStroke) {\n context.beginPath();\n prevX = prevY = NaN;\n }\n ++i;\n break;\n case CanvasInstruction.CIRCLE:\n d = /** @type {number} */ (instruction[1]);\n const x1 = pixelCoordinates[d];\n const y1 = pixelCoordinates[d + 1];\n const x2 = pixelCoordinates[d + 2];\n const y2 = pixelCoordinates[d + 3];\n const dx = x2 - x1;\n const dy = y2 - y1;\n const r = Math.sqrt(dx * dx + dy * dy);\n context.moveTo(x1 + r, y1);\n context.arc(x1, y1, r, 0, 2 * Math.PI, true);\n ++i;\n break;\n case CanvasInstruction.CLOSE_PATH:\n context.closePath();\n ++i;\n break;\n case CanvasInstruction.CUSTOM:\n d = /** @type {number} */ (instruction[1]);\n dd = instruction[2];\n const geometry = /** @type {module:ol/geom/SimpleGeometry} */ (instruction[3]);\n const renderer = instruction[4];\n const fn = instruction.length == 6 ? instruction[5] : undefined;\n state.geometry = geometry;\n state.feature = feature;\n if (!(i in coordinateCache)) {\n coordinateCache[i] = [];\n }\n const coords = coordinateCache[i];\n if (fn) {\n fn(pixelCoordinates, d, dd, 2, coords);\n } else {\n coords[0] = pixelCoordinates[d];\n coords[1] = pixelCoordinates[d + 1];\n coords.length = 2;\n }\n renderer(coords, state);\n ++i;\n break;\n case CanvasInstruction.DRAW_IMAGE:\n d = /** @type {number} */ (instruction[1]);\n dd = /** @type {number} */ (instruction[2]);\n image = /** @type {HTMLCanvasElement|HTMLVideoElement|Image} */\n (instruction[3]);\n // Remaining arguments in DRAW_IMAGE are in alphabetical order\n anchorX = /** @type {number} */ (instruction[4]);\n anchorY = /** @type {number} */ (instruction[5]);\n declutterGroup = featureCallback ? null : /** @type {module:ol/render/canvas~DeclutterGroup} */ (instruction[6]);\n const height = /** @type {number} */ (instruction[7]);\n const opacity = /** @type {number} */ (instruction[8]);\n const originX = /** @type {number} */ (instruction[9]);\n const originY = /** @type {number} */ (instruction[10]);\n const rotateWithView = /** @type {boolean} */ (instruction[11]);\n let rotation = /** @type {number} */ (instruction[12]);\n const scale = /** @type {number} */ (instruction[13]);\n const snapToPixel = /** @type {boolean} */ (instruction[14]);\n const width = /** @type {number} */ (instruction[15]);\n\n let padding, backgroundFill, backgroundStroke;\n if (instruction.length > 16) {\n padding = /** @type {Array.<number>} */ (instruction[16]);\n backgroundFill = /** @type {boolean} */ (instruction[17]);\n backgroundStroke = /** @type {boolean} */ (instruction[18]);\n } else {\n padding = defaultPadding;\n backgroundFill = backgroundStroke = false;\n }\n\n if (rotateWithView) {\n rotation += viewRotation;\n }\n for (; d < dd; d += 2) {\n this.replayImage_(context,\n pixelCoordinates[d], pixelCoordinates[d + 1], image, anchorX, anchorY,\n declutterGroup, height, opacity, originX, originY, rotation, scale,\n snapToPixel, width, padding,\n backgroundFill ? /** @type {Array.<*>} */ (lastFillInstruction) : null,\n backgroundStroke ? /** @type {Array.<*>} */ (lastStrokeInstruction) : null);\n }\n this.renderDeclutter_(declutterGroup, feature);\n ++i;\n break;\n case CanvasInstruction.DRAW_CHARS:\n const begin = /** @type {number} */ (instruction[1]);\n const end = /** @type {number} */ (instruction[2]);\n const baseline = /** @type {number} */ (instruction[3]);\n declutterGroup = featureCallback ? null : /** @type {module:ol/render/canvas~DeclutterGroup} */ (instruction[4]);\n const overflow = /** @type {number} */ (instruction[5]);\n const fillKey = /** @type {string} */ (instruction[6]);\n const maxAngle = /** @type {number} */ (instruction[7]);\n const measure = /** @type {function(string):number} */ (instruction[8]);\n const offsetY = /** @type {number} */ (instruction[9]);\n const strokeKey = /** @type {string} */ (instruction[10]);\n const strokeWidth = /** @type {number} */ (instruction[11]);\n const text = /** @type {string} */ (instruction[12]);\n const textKey = /** @type {string} */ (instruction[13]);\n const textScale = /** @type {number} */ (instruction[14]);\n\n const pathLength = lineStringLength(pixelCoordinates, begin, end, 2);\n const textLength = measure(text);\n if (overflow || textLength <= pathLength) {\n const textAlign = /** @type {module:ol~render} */ (this).textStates[textKey].textAlign;\n const startM = (pathLength - textLength) * TEXT_ALIGN[textAlign];\n const parts = drawTextOnPath(\n pixelCoordinates, begin, end, 2, text, measure, startM, maxAngle);\n if (parts) {\n let c, cc, chars, label, part;\n if (strokeKey) {\n for (c = 0, cc = parts.length; c < cc; ++c) {\n part = parts[c]; // x, y, anchorX, rotation, chunk\n chars = /** @type {string} */ (part[4]);\n label = /** @type {module:ol~render} */ (this).getImage(chars, textKey, '', strokeKey);\n anchorX = /** @type {number} */ (part[2]) + strokeWidth;\n anchorY = baseline * label.height + (0.5 - baseline) * 2 * strokeWidth - offsetY;\n this.replayImage_(context,\n /** @type {number} */ (part[0]), /** @type {number} */ (part[1]), label,\n anchorX, anchorY, declutterGroup, label.height, 1, 0, 0,\n /** @type {number} */ (part[3]), textScale, false, label.width,\n defaultPadding, null, null);\n }\n }\n if (fillKey) {\n for (c = 0, cc = parts.length; c < cc; ++c) {\n part = parts[c]; // x, y, anchorX, rotation, chunk\n chars = /** @type {string} */ (part[4]);\n label = /** @type {module:ol~render} */ (this).getImage(chars, textKey, fillKey, '');\n anchorX = /** @type {number} */ (part[2]);\n anchorY = baseline * label.height - offsetY;\n this.replayImage_(context,\n /** @type {number} */ (part[0]), /** @type {number} */ (part[1]), label,\n anchorX, anchorY, declutterGroup, label.height, 1, 0, 0,\n /** @type {number} */ (part[3]), textScale, false, label.width,\n defaultPadding, null, null);\n }\n }\n }\n }\n this.renderDeclutter_(declutterGroup, feature);\n ++i;\n break;\n case CanvasInstruction.END_GEOMETRY:\n if (featureCallback !== undefined) {\n feature = /** @type {module:ol/Feature|module:ol/render/Feature} */ (instruction[1]);\n const result = featureCallback(feature);\n if (result) {\n return result;\n }\n }\n ++i;\n break;\n case CanvasInstruction.FILL:\n if (batchSize) {\n pendingFill++;\n } else {\n this.fill_(context);\n }\n ++i;\n break;\n case CanvasInstruction.MOVE_TO_LINE_TO:\n d = /** @type {number} */ (instruction[1]);\n dd = /** @type {number} */ (instruction[2]);\n x = pixelCoordinates[d];\n y = pixelCoordinates[d + 1];\n roundX = (x + 0.5) | 0;\n roundY = (y + 0.5) | 0;\n if (roundX !== prevX || roundY !== prevY) {\n context.moveTo(x, y);\n prevX = roundX;\n prevY = roundY;\n }\n for (d += 2; d < dd; d += 2) {\n x = pixelCoordinates[d];\n y = pixelCoordinates[d + 1];\n roundX = (x + 0.5) | 0;\n roundY = (y + 0.5) | 0;\n if (d == dd - 2 || roundX !== prevX || roundY !== prevY) {\n context.lineTo(x, y);\n prevX = roundX;\n prevY = roundY;\n }\n }\n ++i;\n break;\n case CanvasInstruction.SET_FILL_STYLE:\n lastFillInstruction = instruction;\n this.alignFill_ = instruction[2];\n\n if (pendingFill) {\n this.fill_(context);\n pendingFill = 0;\n if (pendingStroke) {\n context.stroke();\n pendingStroke = 0;\n }\n }\n\n context.fillStyle = /** @type {module:ol/colorlike~ColorLike} */ (instruction[1]);\n ++i;\n break;\n case CanvasInstruction.SET_STROKE_STYLE:\n lastStrokeInstruction = instruction;\n if (pendingStroke) {\n context.stroke();\n pendingStroke = 0;\n }\n this.setStrokeStyle_(context, /** @type {Array.<*>} */ (instruction));\n ++i;\n break;\n case CanvasInstruction.STROKE:\n if (batchSize) {\n pendingStroke++;\n } else {\n context.stroke();\n }\n ++i;\n break;\n default:\n ++i; // consume the instruction anyway, to avoid an infinite loop\n break;\n }\n }\n if (pendingFill) {\n this.fill_(context);\n }\n if (pendingStroke) {\n context.stroke();\n }\n return undefined;\n};\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {module:ol/transform~Transform} transform Transform.\n * @param {number} viewRotation View rotation.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features\n * to skip.\n */\nCanvasReplay.prototype.replay = function(\n context, transform, viewRotation, skippedFeaturesHash) {\n this.viewRotation_ = viewRotation;\n this.replay_(context, transform,\n skippedFeaturesHash, this.instructions, undefined, undefined);\n};\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {module:ol/transform~Transform} transform Transform.\n * @param {number} viewRotation View rotation.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features\n * to skip.\n * @param {function((module:ol/Feature|module:ol/render/Feature)): T=} opt_featureCallback\n * Feature callback.\n * @param {module:ol/extent~Extent=} opt_hitExtent Only check features that intersect this\n * extent.\n * @return {T|undefined} Callback result.\n * @template T\n */\nCanvasReplay.prototype.replayHitDetection = function(\n context, transform, viewRotation, skippedFeaturesHash,\n opt_featureCallback, opt_hitExtent) {\n this.viewRotation_ = viewRotation;\n return this.replay_(context, transform, skippedFeaturesHash,\n this.hitDetectionInstructions, opt_featureCallback, opt_hitExtent);\n};\n\n\n/**\n * Reverse the hit detection instructions.\n */\nCanvasReplay.prototype.reverseHitDetectionInstructions = function() {\n const hitDetectionInstructions = this.hitDetectionInstructions;\n // step 1 - reverse array\n hitDetectionInstructions.reverse();\n // step 2 - reverse instructions within geometry blocks\n let i;\n const n = hitDetectionInstructions.length;\n let instruction;\n let type;\n let begin = -1;\n for (i = 0; i < n; ++i) {\n instruction = hitDetectionInstructions[i];\n type = /** @type {module:ol/render/canvas/Instruction} */ (instruction[0]);\n if (type == CanvasInstruction.END_GEOMETRY) {\n begin = i;\n } else if (type == CanvasInstruction.BEGIN_GEOMETRY) {\n instruction[2] = i;\n reverseSubArray(this.hitDetectionInstructions, begin, i);\n begin = -1;\n }\n }\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasReplay.prototype.setFillStrokeStyle = function(fillStyle, strokeStyle) {\n const state = this.state;\n if (fillStyle) {\n const fillStyleColor = fillStyle.getColor();\n state.fillStyle = asColorLike(fillStyleColor ?\n fillStyleColor : defaultFillStyle);\n } else {\n state.fillStyle = undefined;\n }\n if (strokeStyle) {\n const strokeStyleColor = strokeStyle.getColor();\n state.strokeStyle = asColorLike(strokeStyleColor ?\n strokeStyleColor : defaultStrokeStyle);\n const strokeStyleLineCap = strokeStyle.getLineCap();\n state.lineCap = strokeStyleLineCap !== undefined ?\n strokeStyleLineCap : defaultLineCap;\n const strokeStyleLineDash = strokeStyle.getLineDash();\n state.lineDash = strokeStyleLineDash ?\n strokeStyleLineDash.slice() : defaultLineDash;\n const strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n state.lineDashOffset = strokeStyleLineDashOffset ?\n strokeStyleLineDashOffset : defaultLineDashOffset;\n const strokeStyleLineJoin = strokeStyle.getLineJoin();\n state.lineJoin = strokeStyleLineJoin !== undefined ?\n strokeStyleLineJoin : defaultLineJoin;\n const strokeStyleWidth = strokeStyle.getWidth();\n state.lineWidth = strokeStyleWidth !== undefined ?\n strokeStyleWidth : defaultLineWidth;\n const strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n state.miterLimit = strokeStyleMiterLimit !== undefined ?\n strokeStyleMiterLimit : defaultMiterLimit;\n\n if (state.lineWidth > this.maxLineWidth) {\n this.maxLineWidth = state.lineWidth;\n // invalidate the buffered max extent cache\n this.bufferedMaxExtent_ = null;\n }\n } else {\n state.strokeStyle = undefined;\n state.lineCap = undefined;\n state.lineDash = null;\n state.lineDashOffset = undefined;\n state.lineJoin = undefined;\n state.lineWidth = undefined;\n state.miterLimit = undefined;\n }\n};\n\n\n/**\n * @param {module:ol/render/canvas~FillStrokeState} state State.\n * @param {module:ol/geom/Geometry|module:ol/render/Feature} geometry Geometry.\n * @return {Array.<*>} Fill instruction.\n */\nCanvasReplay.prototype.createFill = function(state, geometry) {\n const fillStyle = state.fillStyle;\n const fillInstruction = [CanvasInstruction.SET_FILL_STYLE, fillStyle];\n if (typeof fillStyle !== 'string') {\n // Fill is a pattern or gradient - align it!\n fillInstruction.push(true);\n }\n return fillInstruction;\n};\n\n\n/**\n * @param {module:ol/render/canvas~FillStrokeState} state State.\n */\nCanvasReplay.prototype.applyStroke = function(state) {\n this.instructions.push(this.createStroke(state));\n};\n\n\n/**\n * @param {module:ol/render/canvas~FillStrokeState} state State.\n * @return {Array.<*>} Stroke instruction.\n */\nCanvasReplay.prototype.createStroke = function(state) {\n return [\n CanvasInstruction.SET_STROKE_STYLE,\n state.strokeStyle, state.lineWidth * this.pixelRatio, state.lineCap,\n state.lineJoin, state.miterLimit,\n this.applyPixelRatio(state.lineDash), state.lineDashOffset * this.pixelRatio\n ];\n};\n\n\n/**\n * @param {module:ol/render/canvas~FillStrokeState} state State.\n * @param {function(this:module:ol/render/canvas/Replay, module:ol/render/canvas~FillStrokeState, (module:ol/geom/Geometry|module:ol/render/Feature)):Array.<*>} createFill Create fill.\n * @param {module:ol/geom/Geometry|module:ol/render/Feature} geometry Geometry.\n */\nCanvasReplay.prototype.updateFillStyle = function(state, createFill, geometry) {\n const fillStyle = state.fillStyle;\n if (typeof fillStyle !== 'string' || state.currentFillStyle != fillStyle) {\n if (fillStyle !== undefined) {\n this.instructions.push(createFill.call(this, state, geometry));\n }\n state.currentFillStyle = fillStyle;\n }\n};\n\n\n/**\n * @param {module:ol/render/canvas~FillStrokeState} state State.\n * @param {function(this:module:ol/render/canvas/Replay, module:ol/render/canvas~FillStrokeState)} applyStroke Apply stroke.\n */\nCanvasReplay.prototype.updateStrokeStyle = function(state, applyStroke) {\n const strokeStyle = state.strokeStyle;\n const lineCap = state.lineCap;\n const lineDash = state.lineDash;\n const lineDashOffset = state.lineDashOffset;\n const lineJoin = state.lineJoin;\n const lineWidth = state.lineWidth;\n const miterLimit = state.miterLimit;\n if (state.currentStrokeStyle != strokeStyle ||\n state.currentLineCap != lineCap ||\n (lineDash != state.currentLineDash && !equals(state.currentLineDash, lineDash)) ||\n state.currentLineDashOffset != lineDashOffset ||\n state.currentLineJoin != lineJoin ||\n state.currentLineWidth != lineWidth ||\n state.currentMiterLimit != miterLimit) {\n if (strokeStyle !== undefined) {\n applyStroke.call(this, state);\n }\n state.currentStrokeStyle = strokeStyle;\n state.currentLineCap = lineCap;\n state.currentLineDash = lineDash;\n state.currentLineDashOffset = lineDashOffset;\n state.currentLineJoin = lineJoin;\n state.currentLineWidth = lineWidth;\n state.currentMiterLimit = miterLimit;\n }\n};\n\n\n/**\n * @param {module:ol/geom/Geometry|module:ol/render/Feature} geometry Geometry.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nCanvasReplay.prototype.endGeometry = function(geometry, feature) {\n this.beginGeometryInstruction1_[2] = this.instructions.length;\n this.beginGeometryInstruction1_ = null;\n this.beginGeometryInstruction2_[2] = this.hitDetectionInstructions.length;\n this.beginGeometryInstruction2_ = null;\n const endGeometryInstruction = [CanvasInstruction.END_GEOMETRY, feature];\n this.instructions.push(endGeometryInstruction);\n this.hitDetectionInstructions.push(endGeometryInstruction);\n};\n\n\n/**\n * FIXME empty description for jsdoc\n */\nCanvasReplay.prototype.finish = UNDEFINED;\n\n\n/**\n * Get the buffered rendering extent. Rendering will be clipped to the extent\n * provided to the constructor. To account for symbolizers that may intersect\n * this extent, we calculate a buffered extent (e.g. based on stroke width).\n * @return {module:ol/extent~Extent} The buffered rendering extent.\n * @protected\n */\nCanvasReplay.prototype.getBufferedMaxExtent = function() {\n if (!this.bufferedMaxExtent_) {\n this.bufferedMaxExtent_ = clone(this.maxExtent);\n if (this.maxLineWidth > 0) {\n const width = this.resolution * (this.maxLineWidth + 1) / 2;\n buffer(this.bufferedMaxExtent_, width, this.bufferedMaxExtent_);\n }\n }\n return this.bufferedMaxExtent_;\n};\nexport default CanvasReplay;\n","/**\n * @module ol/render/canvas/ImageReplay\n */\nimport {inherits} from '../../util.js';\nimport CanvasInstruction from '../canvas/Instruction.js';\nimport CanvasReplay from '../canvas/Replay.js';\n\n/**\n * @constructor\n * @extends {module:ol/render/canvas/Replay}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Maximum extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {boolean} overlaps The replay can have overlapping geometries.\n * @param {?} declutterTree Declutter tree.\n * @struct\n */\nconst CanvasImageReplay = function(\n tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n CanvasReplay.call(this,\n tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree);\n\n /**\n * @private\n * @type {module:ol/render/canvas~DeclutterGroup}\n */\n this.declutterGroup_ = null;\n\n /**\n * @private\n * @type {HTMLCanvasElement|HTMLVideoElement|Image}\n */\n this.hitDetectionImage_ = null;\n\n /**\n * @private\n * @type {HTMLCanvasElement|HTMLVideoElement|Image}\n */\n this.image_ = null;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.anchorX_ = undefined;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.anchorY_ = undefined;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.height_ = undefined;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.opacity_ = undefined;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.originX_ = undefined;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.originY_ = undefined;\n\n /**\n * @private\n * @type {boolean|undefined}\n */\n this.rotateWithView_ = undefined;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.rotation_ = undefined;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.scale_ = undefined;\n\n /**\n * @private\n * @type {boolean|undefined}\n */\n this.snapToPixel_ = undefined;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.width_ = undefined;\n\n};\n\ninherits(CanvasImageReplay, CanvasReplay);\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @private\n * @return {number} My end.\n */\nCanvasImageReplay.prototype.drawCoordinates_ = function(flatCoordinates, offset, end, stride) {\n return this.appendFlatCoordinates(flatCoordinates, offset, end, stride, false, false);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasImageReplay.prototype.drawPoint = function(pointGeometry, feature) {\n if (!this.image_) {\n return;\n }\n this.beginGeometry(pointGeometry, feature);\n const flatCoordinates = pointGeometry.getFlatCoordinates();\n const stride = pointGeometry.getStride();\n const myBegin = this.coordinates.length;\n const myEnd = this.drawCoordinates_(flatCoordinates, 0, flatCoordinates.length, stride);\n this.instructions.push([\n CanvasInstruction.DRAW_IMAGE, myBegin, myEnd, this.image_,\n // Remaining arguments to DRAW_IMAGE are in alphabetical order\n this.anchorX_, this.anchorY_, this.declutterGroup_, this.height_, this.opacity_,\n this.originX_, this.originY_, this.rotateWithView_, this.rotation_,\n this.scale_ * this.pixelRatio, this.snapToPixel_, this.width_\n ]);\n this.hitDetectionInstructions.push([\n CanvasInstruction.DRAW_IMAGE, myBegin, myEnd, this.hitDetectionImage_,\n // Remaining arguments to DRAW_IMAGE are in alphabetical order\n this.anchorX_, this.anchorY_, this.declutterGroup_, this.height_, this.opacity_,\n this.originX_, this.originY_, this.rotateWithView_, this.rotation_,\n this.scale_, this.snapToPixel_, this.width_\n ]);\n this.endGeometry(pointGeometry, feature);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasImageReplay.prototype.drawMultiPoint = function(multiPointGeometry, feature) {\n if (!this.image_) {\n return;\n }\n this.beginGeometry(multiPointGeometry, feature);\n const flatCoordinates = multiPointGeometry.getFlatCoordinates();\n const stride = multiPointGeometry.getStride();\n const myBegin = this.coordinates.length;\n const myEnd = this.drawCoordinates_(\n flatCoordinates, 0, flatCoordinates.length, stride);\n this.instructions.push([\n CanvasInstruction.DRAW_IMAGE, myBegin, myEnd, this.image_,\n // Remaining arguments to DRAW_IMAGE are in alphabetical order\n this.anchorX_, this.anchorY_, this.declutterGroup_, this.height_, this.opacity_,\n this.originX_, this.originY_, this.rotateWithView_, this.rotation_,\n this.scale_ * this.pixelRatio, this.snapToPixel_, this.width_\n ]);\n this.hitDetectionInstructions.push([\n CanvasInstruction.DRAW_IMAGE, myBegin, myEnd, this.hitDetectionImage_,\n // Remaining arguments to DRAW_IMAGE are in alphabetical order\n this.anchorX_, this.anchorY_, this.declutterGroup_, this.height_, this.opacity_,\n this.originX_, this.originY_, this.rotateWithView_, this.rotation_,\n this.scale_, this.snapToPixel_, this.width_\n ]);\n this.endGeometry(multiPointGeometry, feature);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasImageReplay.prototype.finish = function() {\n this.reverseHitDetectionInstructions();\n // FIXME this doesn't really protect us against further calls to draw*Geometry\n this.anchorX_ = undefined;\n this.anchorY_ = undefined;\n this.hitDetectionImage_ = null;\n this.image_ = null;\n this.height_ = undefined;\n this.scale_ = undefined;\n this.opacity_ = undefined;\n this.originX_ = undefined;\n this.originY_ = undefined;\n this.rotateWithView_ = undefined;\n this.rotation_ = undefined;\n this.snapToPixel_ = undefined;\n this.width_ = undefined;\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasImageReplay.prototype.setImageStyle = function(imageStyle, declutterGroup) {\n const anchor = imageStyle.getAnchor();\n const size = imageStyle.getSize();\n const hitDetectionImage = imageStyle.getHitDetectionImage(1);\n const image = imageStyle.getImage(1);\n const origin = imageStyle.getOrigin();\n this.anchorX_ = anchor[0];\n this.anchorY_ = anchor[1];\n this.declutterGroup_ = /** @type {module:ol/render/canvas~DeclutterGroup} */ (declutterGroup);\n this.hitDetectionImage_ = hitDetectionImage;\n this.image_ = image;\n this.height_ = size[1];\n this.opacity_ = imageStyle.getOpacity();\n this.originX_ = origin[0];\n this.originY_ = origin[1];\n this.rotateWithView_ = imageStyle.getRotateWithView();\n this.rotation_ = imageStyle.getRotation();\n this.scale_ = imageStyle.getScale();\n this.snapToPixel_ = imageStyle.getSnapToPixel();\n this.width_ = size[0];\n};\nexport default CanvasImageReplay;\n","/**\n * @module ol/render/canvas/LineStringReplay\n */\nimport {inherits} from '../../util.js';\nimport CanvasInstruction, {strokeInstruction, beginPathInstruction} from '../canvas/Instruction.js';\nimport CanvasReplay from '../canvas/Replay.js';\n\n/**\n * @constructor\n * @extends {module:ol/render/canvas/Replay}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Maximum extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {boolean} overlaps The replay can have overlapping geometries.\n * @param {?} declutterTree Declutter tree.\n * @struct\n */\nconst CanvasLineStringReplay = function(\n tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n CanvasReplay.call(this,\n tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree);\n};\n\ninherits(CanvasLineStringReplay, CanvasReplay);\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @private\n * @return {number} end.\n */\nCanvasLineStringReplay.prototype.drawFlatCoordinates_ = function(flatCoordinates, offset, end, stride) {\n const myBegin = this.coordinates.length;\n const myEnd = this.appendFlatCoordinates(\n flatCoordinates, offset, end, stride, false, false);\n const moveToLineToInstruction = [CanvasInstruction.MOVE_TO_LINE_TO, myBegin, myEnd];\n this.instructions.push(moveToLineToInstruction);\n this.hitDetectionInstructions.push(moveToLineToInstruction);\n return end;\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasLineStringReplay.prototype.drawLineString = function(lineStringGeometry, feature) {\n const state = this.state;\n const strokeStyle = state.strokeStyle;\n const lineWidth = state.lineWidth;\n if (strokeStyle === undefined || lineWidth === undefined) {\n return;\n }\n this.updateStrokeStyle(state, this.applyStroke);\n this.beginGeometry(lineStringGeometry, feature);\n this.hitDetectionInstructions.push([\n CanvasInstruction.SET_STROKE_STYLE,\n state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n state.miterLimit, state.lineDash, state.lineDashOffset\n ], beginPathInstruction);\n const flatCoordinates = lineStringGeometry.getFlatCoordinates();\n const stride = lineStringGeometry.getStride();\n this.drawFlatCoordinates_(flatCoordinates, 0, flatCoordinates.length, stride);\n this.hitDetectionInstructions.push(strokeInstruction);\n this.endGeometry(lineStringGeometry, feature);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasLineStringReplay.prototype.drawMultiLineString = function(multiLineStringGeometry, feature) {\n const state = this.state;\n const strokeStyle = state.strokeStyle;\n const lineWidth = state.lineWidth;\n if (strokeStyle === undefined || lineWidth === undefined) {\n return;\n }\n this.updateStrokeStyle(state, this.applyStroke);\n this.beginGeometry(multiLineStringGeometry, feature);\n this.hitDetectionInstructions.push([\n CanvasInstruction.SET_STROKE_STYLE,\n state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n state.miterLimit, state.lineDash, state.lineDashOffset\n ], beginPathInstruction);\n const ends = multiLineStringGeometry.getEnds();\n const flatCoordinates = multiLineStringGeometry.getFlatCoordinates();\n const stride = multiLineStringGeometry.getStride();\n let offset = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n offset = this.drawFlatCoordinates_(flatCoordinates, offset, ends[i], stride);\n }\n this.hitDetectionInstructions.push(strokeInstruction);\n this.endGeometry(multiLineStringGeometry, feature);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasLineStringReplay.prototype.finish = function() {\n const state = this.state;\n if (state.lastStroke != undefined && state.lastStroke != this.coordinates.length) {\n this.instructions.push(strokeInstruction);\n }\n this.reverseHitDetectionInstructions();\n this.state = null;\n};\n\n\n/**\n * @inheritDoc.\n */\nCanvasLineStringReplay.prototype.applyStroke = function(state) {\n if (state.lastStroke != undefined && state.lastStroke != this.coordinates.length) {\n this.instructions.push(strokeInstruction);\n state.lastStroke = this.coordinates.length;\n }\n state.lastStroke = 0;\n CanvasReplay.prototype.applyStroke.call(this, state);\n this.instructions.push(beginPathInstruction);\n};\nexport default CanvasLineStringReplay;\n","/**\n * @module ol/render/canvas/PolygonReplay\n */\nimport {inherits} from '../../util.js';\nimport {asString} from '../../color.js';\nimport {snap} from '../../geom/flat/simplify.js';\nimport {defaultFillStyle} from '../canvas.js';\nimport CanvasInstruction, {\n fillInstruction, strokeInstruction, beginPathInstruction, closePathInstruction\n} from '../canvas/Instruction.js';\nimport CanvasReplay from '../canvas/Replay.js';\n\n\n/**\n * @constructor\n * @extends {module:ol/render/canvas/Replay}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Maximum extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {boolean} overlaps The replay can have overlapping geometries.\n * @param {?} declutterTree Declutter tree.\n * @struct\n */\nconst CanvasPolygonReplay = function(\n tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n CanvasReplay.call(this,\n tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree);\n};\n\ninherits(CanvasPolygonReplay, CanvasReplay);\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {Array.<number>} ends Ends.\n * @param {number} stride Stride.\n * @private\n * @return {number} End.\n */\nCanvasPolygonReplay.prototype.drawFlatCoordinatess_ = function(flatCoordinates, offset, ends, stride) {\n const state = this.state;\n const fill = state.fillStyle !== undefined;\n const stroke = state.strokeStyle != undefined;\n const numEnds = ends.length;\n this.instructions.push(beginPathInstruction);\n this.hitDetectionInstructions.push(beginPathInstruction);\n for (let i = 0; i < numEnds; ++i) {\n const end = ends[i];\n const myBegin = this.coordinates.length;\n const myEnd = this.appendFlatCoordinates(flatCoordinates, offset, end, stride, true, !stroke);\n const moveToLineToInstruction = [CanvasInstruction.MOVE_TO_LINE_TO, myBegin, myEnd];\n this.instructions.push(moveToLineToInstruction);\n this.hitDetectionInstructions.push(moveToLineToInstruction);\n if (stroke) {\n // Performance optimization: only call closePath() when we have a stroke.\n // Otherwise the ring is closed already (see appendFlatCoordinates above).\n this.instructions.push(closePathInstruction);\n this.hitDetectionInstructions.push(closePathInstruction);\n }\n offset = end;\n }\n if (fill) {\n this.instructions.push(fillInstruction);\n this.hitDetectionInstructions.push(fillInstruction);\n }\n if (stroke) {\n this.instructions.push(strokeInstruction);\n this.hitDetectionInstructions.push(strokeInstruction);\n }\n return offset;\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasPolygonReplay.prototype.drawCircle = function(circleGeometry, feature) {\n const state = this.state;\n const fillStyle = state.fillStyle;\n const strokeStyle = state.strokeStyle;\n if (fillStyle === undefined && strokeStyle === undefined) {\n return;\n }\n this.setFillStrokeStyles_(circleGeometry);\n this.beginGeometry(circleGeometry, feature);\n if (state.fillStyle !== undefined) {\n this.hitDetectionInstructions.push([\n CanvasInstruction.SET_FILL_STYLE,\n asString(defaultFillStyle)\n ]);\n }\n if (state.strokeStyle !== undefined) {\n this.hitDetectionInstructions.push([\n CanvasInstruction.SET_STROKE_STYLE,\n state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n state.miterLimit, state.lineDash, state.lineDashOffset\n ]);\n }\n const flatCoordinates = circleGeometry.getFlatCoordinates();\n const stride = circleGeometry.getStride();\n const myBegin = this.coordinates.length;\n this.appendFlatCoordinates(\n flatCoordinates, 0, flatCoordinates.length, stride, false, false);\n const circleInstruction = [CanvasInstruction.CIRCLE, myBegin];\n this.instructions.push(beginPathInstruction, circleInstruction);\n this.hitDetectionInstructions.push(beginPathInstruction, circleInstruction);\n this.hitDetectionInstructions.push(fillInstruction);\n if (state.fillStyle !== undefined) {\n this.instructions.push(fillInstruction);\n }\n if (state.strokeStyle !== undefined) {\n this.instructions.push(strokeInstruction);\n this.hitDetectionInstructions.push(strokeInstruction);\n }\n this.endGeometry(circleGeometry, feature);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasPolygonReplay.prototype.drawPolygon = function(polygonGeometry, feature) {\n const state = this.state;\n const fillStyle = state.fillStyle;\n const strokeStyle = state.strokeStyle;\n if (fillStyle === undefined && strokeStyle === undefined) {\n return;\n }\n this.setFillStrokeStyles_(polygonGeometry);\n this.beginGeometry(polygonGeometry, feature);\n if (state.fillStyle !== undefined) {\n this.hitDetectionInstructions.push([\n CanvasInstruction.SET_FILL_STYLE,\n asString(defaultFillStyle)\n ]);\n }\n if (state.strokeStyle !== undefined) {\n this.hitDetectionInstructions.push([\n CanvasInstruction.SET_STROKE_STYLE,\n state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n state.miterLimit, state.lineDash, state.lineDashOffset\n ]);\n }\n const ends = polygonGeometry.getEnds();\n const flatCoordinates = polygonGeometry.getOrientedFlatCoordinates();\n const stride = polygonGeometry.getStride();\n this.drawFlatCoordinatess_(flatCoordinates, 0, ends, stride);\n this.endGeometry(polygonGeometry, feature);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasPolygonReplay.prototype.drawMultiPolygon = function(multiPolygonGeometry, feature) {\n const state = this.state;\n const fillStyle = state.fillStyle;\n const strokeStyle = state.strokeStyle;\n if (fillStyle === undefined && strokeStyle === undefined) {\n return;\n }\n this.setFillStrokeStyles_(multiPolygonGeometry);\n this.beginGeometry(multiPolygonGeometry, feature);\n if (state.fillStyle !== undefined) {\n this.hitDetectionInstructions.push([\n CanvasInstruction.SET_FILL_STYLE,\n asString(defaultFillStyle)\n ]);\n }\n if (state.strokeStyle !== undefined) {\n this.hitDetectionInstructions.push([\n CanvasInstruction.SET_STROKE_STYLE,\n state.strokeStyle, state.lineWidth, state.lineCap, state.lineJoin,\n state.miterLimit, state.lineDash, state.lineDashOffset\n ]);\n }\n const endss = multiPolygonGeometry.getEndss();\n const flatCoordinates = multiPolygonGeometry.getOrientedFlatCoordinates();\n const stride = multiPolygonGeometry.getStride();\n let offset = 0;\n for (let i = 0, ii = endss.length; i < ii; ++i) {\n offset = this.drawFlatCoordinatess_(flatCoordinates, offset, endss[i], stride);\n }\n this.endGeometry(multiPolygonGeometry, feature);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasPolygonReplay.prototype.finish = function() {\n this.reverseHitDetectionInstructions();\n this.state = null;\n // We want to preserve topology when drawing polygons. Polygons are\n // simplified using quantization and point elimination. However, we might\n // have received a mix of quantized and non-quantized geometries, so ensure\n // that all are quantized by quantizing all coordinates in the batch.\n const tolerance = this.tolerance;\n if (tolerance !== 0) {\n const coordinates = this.coordinates;\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n coordinates[i] = snap(coordinates[i], tolerance);\n }\n }\n};\n\n\n/**\n * @private\n * @param {module:ol/geom/Geometry|module:ol/render/Feature} geometry Geometry.\n */\nCanvasPolygonReplay.prototype.setFillStrokeStyles_ = function(geometry) {\n const state = this.state;\n const fillStyle = state.fillStyle;\n if (fillStyle !== undefined) {\n this.updateFillStyle(state, this.createFill, geometry);\n }\n if (state.strokeStyle !== undefined) {\n this.updateStrokeStyle(state, this.applyStroke);\n }\n};\nexport default CanvasPolygonReplay;\n","/**\n * @module ol/geom/flat/straightchunk\n */\n\n\n/**\n * @param {number} maxAngle Maximum acceptable angle delta between segments.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {Array.<number>} Start and end of the first suitable chunk of the\n * given `flatCoordinates`.\n */\nexport function matchingChunk(maxAngle, flatCoordinates, offset, end, stride) {\n let chunkStart = offset;\n let chunkEnd = offset;\n let chunkM = 0;\n let m = 0;\n let start = offset;\n let acos, i, m12, m23, x1, y1, x12, y12, x23, y23;\n for (i = offset; i < end; i += stride) {\n const x2 = flatCoordinates[i];\n const y2 = flatCoordinates[i + 1];\n if (x1 !== undefined) {\n x23 = x2 - x1;\n y23 = y2 - y1;\n m23 = Math.sqrt(x23 * x23 + y23 * y23);\n if (x12 !== undefined) {\n m += m12;\n acos = Math.acos((x12 * x23 + y12 * y23) / (m12 * m23));\n if (acos > maxAngle) {\n if (m > chunkM) {\n chunkM = m;\n chunkStart = start;\n chunkEnd = i;\n }\n m = 0;\n start = i - stride;\n }\n }\n m12 = m23;\n x12 = x23;\n y12 = y23;\n }\n x1 = x2;\n y1 = y2;\n }\n m += m23;\n return m > chunkM ? [start, i] : [chunkStart, chunkEnd];\n}\n","/**\n * @module ol/render/canvas/TextReplay\n */\nimport {getUid, inherits} from '../../util.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {intersects} from '../../extent.js';\nimport {matchingChunk} from '../../geom/flat/straightchunk.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport {CANVAS_LINE_DASH} from '../../has.js';\nimport {labelCache, measureTextWidth, defaultTextAlign, measureTextHeight, defaultPadding, defaultLineCap, defaultLineDashOffset, defaultLineDash, defaultLineJoin, defaultFillStyle, checkFont, defaultFont, defaultLineWidth, defaultMiterLimit, defaultStrokeStyle, defaultTextBaseline} from '../canvas.js';\nimport CanvasInstruction from '../canvas/Instruction.js';\nimport CanvasReplay from '../canvas/Replay.js';\nimport {TEXT_ALIGN} from '../replay.js';\nimport TextPlacement from '../../style/TextPlacement.js';\n\n/**\n * @constructor\n * @extends {module:ol/render/canvas/Replay}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Maximum extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {boolean} overlaps The replay can have overlapping geometries.\n * @param {?} declutterTree Declutter tree.\n * @struct\n */\nconst CanvasTextReplay = function(\n tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree) {\n CanvasReplay.call(this,\n tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree);\n\n /**\n * @private\n * @type {module:ol/render/canvas~DeclutterGroup}\n */\n this.declutterGroup_;\n\n /**\n * @private\n * @type {Array.<HTMLCanvasElement>}\n */\n this.labels_ = null;\n\n /**\n * @private\n * @type {string}\n */\n this.text_ = '';\n\n /**\n * @private\n * @type {number}\n */\n this.textOffsetX_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.textOffsetY_ = 0;\n\n /**\n * @private\n * @type {boolean|undefined}\n */\n this.textRotateWithView_ = undefined;\n\n /**\n * @private\n * @type {number}\n */\n this.textRotation_ = 0;\n\n /**\n * @private\n * @type {?module:ol/render/canvas~FillState}\n */\n this.textFillState_ = null;\n\n /**\n * @type {!Object.<string, module:ol/render/canvas~FillState>}\n */\n this.fillStates = {};\n\n /**\n * @private\n * @type {?module:ol/render/canvas~StrokeState}\n */\n this.textStrokeState_ = null;\n\n /**\n * @type {!Object.<string, module:ol/render/canvas~StrokeState>}\n */\n this.strokeStates = {};\n\n /**\n * @private\n * @type {module:ol/render/canvas~TextState}\n */\n this.textState_ = /** @type {module:ol/render/canvas~TextState} */ ({});\n\n /**\n * @type {!Object.<string, module:ol/render/canvas~TextState>}\n */\n this.textStates = {};\n\n /**\n * @private\n * @type {string}\n */\n this.textKey_ = '';\n\n /**\n * @private\n * @type {string}\n */\n this.fillKey_ = '';\n\n /**\n * @private\n * @type {string}\n */\n this.strokeKey_ = '';\n\n /**\n * @private\n * @type {Object.<string, Object.<string, number>>}\n */\n this.widths_ = {};\n\n labelCache.prune();\n\n};\n\ninherits(CanvasTextReplay, CanvasReplay);\n\n\n/**\n * @param {string} font Font to use for measuring.\n * @param {Array.<string>} lines Lines to measure.\n * @param {Array.<number>} widths Array will be populated with the widths of\n * each line.\n * @return {number} Width of the whole text.\n */\nexport function measureTextWidths(font, lines, widths) {\n const numLines = lines.length;\n let width = 0;\n for (let i = 0; i < numLines; ++i) {\n const currentWidth = measureTextWidth(font, lines[i]);\n width = Math.max(width, currentWidth);\n widths.push(currentWidth);\n }\n return width;\n}\n\n\n/**\n * @inheritDoc\n */\nCanvasTextReplay.prototype.drawText = function(geometry, feature) {\n const fillState = this.textFillState_;\n const strokeState = this.textStrokeState_;\n const textState = this.textState_;\n if (this.text_ === '' || !textState || (!fillState && !strokeState)) {\n return;\n }\n\n let begin = this.coordinates.length;\n\n const geometryType = geometry.getType();\n let flatCoordinates = null;\n let end = 2;\n let stride = 2;\n let i, ii;\n\n if (textState.placement === TextPlacement.LINE) {\n if (!intersects(this.getBufferedMaxExtent(), geometry.getExtent())) {\n return;\n }\n let ends;\n flatCoordinates = geometry.getFlatCoordinates();\n stride = geometry.getStride();\n if (geometryType == GeometryType.LINE_STRING) {\n ends = [flatCoordinates.length];\n } else if (geometryType == GeometryType.MULTI_LINE_STRING) {\n ends = geometry.getEnds();\n } else if (geometryType == GeometryType.POLYGON) {\n ends = geometry.getEnds().slice(0, 1);\n } else if (geometryType == GeometryType.MULTI_POLYGON) {\n const endss = geometry.getEndss();\n ends = [];\n for (i = 0, ii = endss.length; i < ii; ++i) {\n ends.push(endss[i][0]);\n }\n }\n this.beginGeometry(geometry, feature);\n const textAlign = textState.textAlign;\n let flatOffset = 0;\n let flatEnd;\n for (let o = 0, oo = ends.length; o < oo; ++o) {\n if (textAlign == undefined) {\n const range = matchingChunk(textState.maxAngle, flatCoordinates, flatOffset, ends[o], stride);\n flatOffset = range[0];\n flatEnd = range[1];\n } else {\n flatEnd = ends[o];\n }\n for (i = flatOffset; i < flatEnd; i += stride) {\n this.coordinates.push(flatCoordinates[i], flatCoordinates[i + 1]);\n }\n end = this.coordinates.length;\n flatOffset = ends[o];\n this.drawChars_(begin, end, this.declutterGroup_);\n begin = end;\n }\n this.endGeometry(geometry, feature);\n\n } else {\n const label = this.getImage(this.text_, this.textKey_, this.fillKey_, this.strokeKey_);\n const width = label.width / this.pixelRatio;\n switch (geometryType) {\n case GeometryType.POINT:\n case GeometryType.MULTI_POINT:\n flatCoordinates = geometry.getFlatCoordinates();\n end = flatCoordinates.length;\n break;\n case GeometryType.LINE_STRING:\n flatCoordinates = /** @type {module:ol/geom/LineString} */ (geometry).getFlatMidpoint();\n break;\n case GeometryType.CIRCLE:\n flatCoordinates = /** @type {module:ol/geom/Circle} */ (geometry).getCenter();\n break;\n case GeometryType.MULTI_LINE_STRING:\n flatCoordinates = /** @type {module:ol/geom/MultiLineString} */ (geometry).getFlatMidpoints();\n end = flatCoordinates.length;\n break;\n case GeometryType.POLYGON:\n flatCoordinates = /** @type {module:ol/geom/Polygon} */ (geometry).getFlatInteriorPoint();\n if (!textState.overflow && flatCoordinates[2] / this.resolution < width) {\n return;\n }\n stride = 3;\n break;\n case GeometryType.MULTI_POLYGON:\n const interiorPoints = /** @type {module:ol/geom/MultiPolygon} */ (geometry).getFlatInteriorPoints();\n flatCoordinates = [];\n for (i = 0, ii = interiorPoints.length; i < ii; i += 3) {\n if (textState.overflow || interiorPoints[i + 2] / this.resolution >= width) {\n flatCoordinates.push(interiorPoints[i], interiorPoints[i + 1]);\n }\n }\n end = flatCoordinates.length;\n if (end == 0) {\n return;\n }\n break;\n default:\n }\n end = this.appendFlatCoordinates(flatCoordinates, 0, end, stride, false, false);\n if (textState.backgroundFill || textState.backgroundStroke) {\n this.setFillStrokeStyle(textState.backgroundFill, textState.backgroundStroke);\n if (textState.backgroundFill) {\n this.updateFillStyle(this.state, this.createFill, geometry);\n this.hitDetectionInstructions.push(this.createFill(this.state, geometry));\n }\n if (textState.backgroundStroke) {\n this.updateStrokeStyle(this.state, this.applyStroke);\n this.hitDetectionInstructions.push(this.createStroke(this.state));\n }\n }\n this.beginGeometry(geometry, feature);\n this.drawTextImage_(label, begin, end);\n this.endGeometry(geometry, feature);\n }\n};\n\n\n/**\n * @param {string} text Text.\n * @param {string} textKey Text style key.\n * @param {string} fillKey Fill style key.\n * @param {string} strokeKey Stroke style key.\n * @return {HTMLCanvasElement} Image.\n */\nCanvasTextReplay.prototype.getImage = function(text, textKey, fillKey, strokeKey) {\n let label;\n const key = strokeKey + textKey + text + fillKey + this.pixelRatio;\n\n if (!labelCache.containsKey(key)) {\n const strokeState = strokeKey ? this.strokeStates[strokeKey] || this.textStrokeState_ : null;\n const fillState = fillKey ? this.fillStates[fillKey] || this.textFillState_ : null;\n const textState = this.textStates[textKey] || this.textState_;\n const pixelRatio = this.pixelRatio;\n const scale = textState.scale * pixelRatio;\n const align = TEXT_ALIGN[textState.textAlign || defaultTextAlign];\n const strokeWidth = strokeKey && strokeState.lineWidth ? strokeState.lineWidth : 0;\n\n const lines = text.split('\\n');\n const numLines = lines.length;\n const widths = [];\n const width = measureTextWidths(textState.font, lines, widths);\n const lineHeight = measureTextHeight(textState.font);\n const height = lineHeight * numLines;\n const renderWidth = (width + strokeWidth);\n const context = createCanvasContext2D(\n Math.ceil(renderWidth * scale),\n Math.ceil((height + strokeWidth) * scale));\n label = context.canvas;\n labelCache.set(key, label);\n if (scale != 1) {\n context.scale(scale, scale);\n }\n context.font = textState.font;\n if (strokeKey) {\n context.strokeStyle = strokeState.strokeStyle;\n context.lineWidth = strokeWidth;\n context.lineCap = strokeState.lineCap;\n context.lineJoin = strokeState.lineJoin;\n context.miterLimit = strokeState.miterLimit;\n if (CANVAS_LINE_DASH && strokeState.lineDash.length) {\n context.setLineDash(strokeState.lineDash);\n context.lineDashOffset = strokeState.lineDashOffset;\n }\n }\n if (fillKey) {\n context.fillStyle = fillState.fillStyle;\n }\n context.textBaseline = 'middle';\n context.textAlign = 'center';\n const leftRight = (0.5 - align);\n const x = align * label.width / scale + leftRight * strokeWidth;\n let i;\n if (strokeKey) {\n for (i = 0; i < numLines; ++i) {\n context.strokeText(lines[i], x + leftRight * widths[i], 0.5 * (strokeWidth + lineHeight) + i * lineHeight);\n }\n }\n if (fillKey) {\n for (i = 0; i < numLines; ++i) {\n context.fillText(lines[i], x + leftRight * widths[i], 0.5 * (strokeWidth + lineHeight) + i * lineHeight);\n }\n }\n }\n return labelCache.get(key);\n};\n\n\n/**\n * @private\n * @param {HTMLCanvasElement} label Label.\n * @param {number} begin Begin.\n * @param {number} end End.\n */\nCanvasTextReplay.prototype.drawTextImage_ = function(label, begin, end) {\n const textState = this.textState_;\n const strokeState = this.textStrokeState_;\n const pixelRatio = this.pixelRatio;\n const align = TEXT_ALIGN[textState.textAlign || defaultTextAlign];\n const baseline = TEXT_ALIGN[textState.textBaseline];\n const strokeWidth = strokeState && strokeState.lineWidth ? strokeState.lineWidth : 0;\n\n const anchorX = align * label.width / pixelRatio + 2 * (0.5 - align) * strokeWidth;\n const anchorY = baseline * label.height / pixelRatio + 2 * (0.5 - baseline) * strokeWidth;\n this.instructions.push([CanvasInstruction.DRAW_IMAGE, begin, end,\n label, (anchorX - this.textOffsetX_) * pixelRatio, (anchorY - this.textOffsetY_) * pixelRatio,\n this.declutterGroup_, label.height, 1, 0, 0, this.textRotateWithView_, this.textRotation_,\n 1, true, label.width,\n textState.padding == defaultPadding ?\n defaultPadding : textState.padding.map(function(p) {\n return p * pixelRatio;\n }),\n !!textState.backgroundFill, !!textState.backgroundStroke\n ]);\n this.hitDetectionInstructions.push([CanvasInstruction.DRAW_IMAGE, begin, end,\n label, (anchorX - this.textOffsetX_) * pixelRatio, (anchorY - this.textOffsetY_) * pixelRatio,\n this.declutterGroup_, label.height, 1, 0, 0, this.textRotateWithView_, this.textRotation_,\n 1 / pixelRatio, true, label.width, textState.padding,\n !!textState.backgroundFill, !!textState.backgroundStroke\n ]);\n};\n\n\n/**\n * @private\n * @param {number} begin Begin.\n * @param {number} end End.\n * @param {module:ol/render/canvas~DeclutterGroup} declutterGroup Declutter group.\n */\nCanvasTextReplay.prototype.drawChars_ = function(begin, end, declutterGroup) {\n const strokeState = this.textStrokeState_;\n const textState = this.textState_;\n const fillState = this.textFillState_;\n\n const strokeKey = this.strokeKey_;\n if (strokeState) {\n if (!(strokeKey in this.strokeStates)) {\n this.strokeStates[strokeKey] = /** @type {module:ol/render/canvas~StrokeState} */ ({\n strokeStyle: strokeState.strokeStyle,\n lineCap: strokeState.lineCap,\n lineDashOffset: strokeState.lineDashOffset,\n lineWidth: strokeState.lineWidth,\n lineJoin: strokeState.lineJoin,\n miterLimit: strokeState.miterLimit,\n lineDash: strokeState.lineDash\n });\n }\n }\n const textKey = this.textKey_;\n if (!(this.textKey_ in this.textStates)) {\n this.textStates[this.textKey_] = /** @type {module:ol/render/canvas~TextState} */ ({\n font: textState.font,\n textAlign: textState.textAlign || defaultTextAlign,\n scale: textState.scale\n });\n }\n const fillKey = this.fillKey_;\n if (fillState) {\n if (!(fillKey in this.fillStates)) {\n this.fillStates[fillKey] = /** @type {module:ol/render/canvas~FillState} */ ({\n fillStyle: fillState.fillStyle\n });\n }\n }\n\n const pixelRatio = this.pixelRatio;\n const baseline = TEXT_ALIGN[textState.textBaseline];\n\n const offsetY = this.textOffsetY_ * pixelRatio;\n const text = this.text_;\n const font = textState.font;\n const textScale = textState.scale;\n const strokeWidth = strokeState ? strokeState.lineWidth * textScale / 2 : 0;\n let widths = this.widths_[font];\n if (!widths) {\n this.widths_[font] = widths = {};\n }\n this.instructions.push([CanvasInstruction.DRAW_CHARS,\n begin, end, baseline, declutterGroup,\n textState.overflow, fillKey, textState.maxAngle,\n function(text) {\n let width = widths[text];\n if (!width) {\n width = widths[text] = measureTextWidth(font, text);\n }\n return width * textScale * pixelRatio;\n },\n offsetY, strokeKey, strokeWidth * pixelRatio, text, textKey, 1\n ]);\n this.hitDetectionInstructions.push([CanvasInstruction.DRAW_CHARS,\n begin, end, baseline, declutterGroup,\n textState.overflow, fillKey, textState.maxAngle,\n function(text) {\n let width = widths[text];\n if (!width) {\n width = widths[text] = measureTextWidth(font, text);\n }\n return width * textScale;\n },\n offsetY, strokeKey, strokeWidth, text, textKey, 1 / pixelRatio\n ]);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasTextReplay.prototype.setTextStyle = function(textStyle, declutterGroup) {\n let textState, fillState, strokeState;\n if (!textStyle) {\n this.text_ = '';\n } else {\n this.declutterGroup_ = /** @type {module:ol/render/canvas~DeclutterGroup} */ (declutterGroup);\n\n const textFillStyle = textStyle.getFill();\n if (!textFillStyle) {\n fillState = this.textFillState_ = null;\n } else {\n fillState = this.textFillState_;\n if (!fillState) {\n fillState = this.textFillState_ = /** @type {module:ol/render/canvas~FillState} */ ({});\n }\n fillState.fillStyle = asColorLike(\n textFillStyle.getColor() || defaultFillStyle);\n }\n\n const textStrokeStyle = textStyle.getStroke();\n if (!textStrokeStyle) {\n strokeState = this.textStrokeState_ = null;\n } else {\n strokeState = this.textStrokeState_;\n if (!strokeState) {\n strokeState = this.textStrokeState_ = /** @type {module:ol/render/canvas~StrokeState} */ ({});\n }\n const lineDash = textStrokeStyle.getLineDash();\n const lineDashOffset = textStrokeStyle.getLineDashOffset();\n const lineWidth = textStrokeStyle.getWidth();\n const miterLimit = textStrokeStyle.getMiterLimit();\n strokeState.lineCap = textStrokeStyle.getLineCap() || defaultLineCap;\n strokeState.lineDash = lineDash ? lineDash.slice() : defaultLineDash;\n strokeState.lineDashOffset =\n lineDashOffset === undefined ? defaultLineDashOffset : lineDashOffset;\n strokeState.lineJoin = textStrokeStyle.getLineJoin() || defaultLineJoin;\n strokeState.lineWidth =\n lineWidth === undefined ? defaultLineWidth : lineWidth;\n strokeState.miterLimit =\n miterLimit === undefined ? defaultMiterLimit : miterLimit;\n strokeState.strokeStyle = asColorLike(\n textStrokeStyle.getColor() || defaultStrokeStyle);\n }\n\n textState = this.textState_;\n const font = textStyle.getFont() || defaultFont;\n checkFont(font);\n const textScale = textStyle.getScale();\n textState.overflow = textStyle.getOverflow();\n textState.font = font;\n textState.maxAngle = textStyle.getMaxAngle();\n textState.placement = textStyle.getPlacement();\n textState.textAlign = textStyle.getTextAlign();\n textState.textBaseline = textStyle.getTextBaseline() || defaultTextBaseline;\n textState.backgroundFill = textStyle.getBackgroundFill();\n textState.backgroundStroke = textStyle.getBackgroundStroke();\n textState.padding = textStyle.getPadding() || defaultPadding;\n textState.scale = textScale === undefined ? 1 : textScale;\n\n const textOffsetX = textStyle.getOffsetX();\n const textOffsetY = textStyle.getOffsetY();\n const textRotateWithView = textStyle.getRotateWithView();\n const textRotation = textStyle.getRotation();\n this.text_ = textStyle.getText() || '';\n this.textOffsetX_ = textOffsetX === undefined ? 0 : textOffsetX;\n this.textOffsetY_ = textOffsetY === undefined ? 0 : textOffsetY;\n this.textRotateWithView_ = textRotateWithView === undefined ? false : textRotateWithView;\n this.textRotation_ = textRotation === undefined ? 0 : textRotation;\n\n this.strokeKey_ = strokeState ?\n (typeof strokeState.strokeStyle == 'string' ? strokeState.strokeStyle : getUid(strokeState.strokeStyle)) +\n strokeState.lineCap + strokeState.lineDashOffset + '|' + strokeState.lineWidth +\n strokeState.lineJoin + strokeState.miterLimit + '[' + strokeState.lineDash.join() + ']' :\n '';\n this.textKey_ = textState.font + textState.scale + (textState.textAlign || '?');\n this.fillKey_ = fillState ?\n (typeof fillState.fillStyle == 'string' ? fillState.fillStyle : ('|' + getUid(fillState.fillStyle))) :\n '';\n }\n};\nexport default CanvasTextReplay;\n","/**\n * @module ol/render/canvas/ReplayGroup\n */\nimport {inherits} from '../../util.js';\nimport {numberSafeCompareFunction} from '../../array.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {buffer, createEmpty, extendCoordinate} from '../../extent.js';\nimport {transform2D} from '../../geom/flat/transform.js';\nimport {isEmpty} from '../../obj.js';\nimport ReplayGroup from '../ReplayGroup.js';\nimport ReplayType from '../ReplayType.js';\nimport CanvasReplay from '../canvas/Replay.js';\nimport CanvasImageReplay from '../canvas/ImageReplay.js';\nimport CanvasLineStringReplay from '../canvas/LineStringReplay.js';\nimport CanvasPolygonReplay from '../canvas/PolygonReplay.js';\nimport CanvasTextReplay from '../canvas/TextReplay.js';\nimport {ORDER} from '../replay.js';\nimport {create as createTransform, compose as composeTransform} from '../../transform.js';\n\n\n/**\n * @type {Object.<module:ol/render/ReplayType,\n * function(new: module:ol/render/canvas/Replay, number, module:ol/extent~Extent,\n * number, number, boolean, Array.<module:ol/render/canvas~DeclutterGroup>)>}\n */\nconst BATCH_CONSTRUCTORS = {\n 'Circle': CanvasPolygonReplay,\n 'Default': CanvasReplay,\n 'Image': CanvasImageReplay,\n 'LineString': CanvasLineStringReplay,\n 'Polygon': CanvasPolygonReplay,\n 'Text': CanvasTextReplay\n};\n\n\n/**\n * @constructor\n * @extends {module:ol/render/ReplayGroup}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Max extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {boolean} overlaps The replay group can have overlapping geometries.\n * @param {?} declutterTree Declutter tree\n * for declutter processing in postrender.\n * @param {number=} opt_renderBuffer Optional rendering buffer.\n * @struct\n */\nconst CanvasReplayGroup = function(\n tolerance, maxExtent, resolution, pixelRatio, overlaps, declutterTree, opt_renderBuffer) {\n ReplayGroup.call(this);\n\n /**\n * Declutter tree.\n * @private\n */\n this.declutterTree_ = declutterTree;\n\n /**\n * @type {module:ol/render/canvas~DeclutterGroup}\n * @private\n */\n this.declutterGroup_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.tolerance_ = tolerance;\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.maxExtent_ = maxExtent;\n\n /**\n * @private\n * @type {boolean}\n */\n this.overlaps_ = overlaps;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ = pixelRatio;\n\n /**\n * @private\n * @type {number}\n */\n this.resolution_ = resolution;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.renderBuffer_ = opt_renderBuffer;\n\n /**\n * @private\n * @type {!Object.<string, !Object.<module:ol/render/ReplayType, module:ol/render/canvas/Replay>>}\n */\n this.replaysByZIndex_ = {};\n\n /**\n * @private\n * @type {CanvasRenderingContext2D}\n */\n this.hitDetectionContext_ = createCanvasContext2D(1, 1);\n\n /**\n * @private\n * @type {module:ol/transform~Transform}\n */\n this.hitDetectionTransform_ = createTransform();\n};\n\ninherits(CanvasReplayGroup, ReplayGroup);\n\n\n/**\n * This cache is used for storing calculated pixel circles for increasing performance.\n * It is a static property to allow each Replaygroup to access it.\n * @type {Object.<number, Array.<Array.<(boolean|undefined)>>>}\n */\nconst circleArrayCache = {\n 0: [[true]]\n};\n\n\n/**\n * This method fills a row in the array from the given coordinate to the\n * middle with `true`.\n * @param {Array.<Array.<(boolean|undefined)>>} array The array that will be altered.\n * @param {number} x X coordinate.\n * @param {number} y Y coordinate.\n */\nfunction fillCircleArrayRowToMiddle(array, x, y) {\n let i;\n const radius = Math.floor(array.length / 2);\n if (x >= radius) {\n for (i = radius; i < x; i++) {\n array[i][y] = true;\n }\n } else if (x < radius) {\n for (i = x + 1; i < radius; i++) {\n array[i][y] = true;\n }\n }\n}\n\n\n/**\n * This methods creates a circle inside a fitting array. Points inside the\n * circle are marked by true, points on the outside are undefined.\n * It uses the midpoint circle algorithm.\n * A cache is used to increase performance.\n * @param {number} radius Radius.\n * @returns {Array.<Array.<(boolean|undefined)>>} An array with marked circle points.\n */\nexport function getCircleArray(radius) {\n if (circleArrayCache[radius] !== undefined) {\n return circleArrayCache[radius];\n }\n\n const arraySize = radius * 2 + 1;\n const arr = new Array(arraySize);\n for (let i = 0; i < arraySize; i++) {\n arr[i] = new Array(arraySize);\n }\n\n let x = radius;\n let y = 0;\n let error = 0;\n\n while (x >= y) {\n fillCircleArrayRowToMiddle(arr, radius + x, radius + y);\n fillCircleArrayRowToMiddle(arr, radius + y, radius + x);\n fillCircleArrayRowToMiddle(arr, radius - y, radius + x);\n fillCircleArrayRowToMiddle(arr, radius - x, radius + y);\n fillCircleArrayRowToMiddle(arr, radius - x, radius - y);\n fillCircleArrayRowToMiddle(arr, radius - y, radius - x);\n fillCircleArrayRowToMiddle(arr, radius + y, radius - x);\n fillCircleArrayRowToMiddle(arr, radius + x, radius - y);\n\n y++;\n error += 1 + 2 * y;\n if (2 * (error - x) + 1 > 0) {\n x -= 1;\n error += 1 - 2 * x;\n }\n }\n\n circleArrayCache[radius] = arr;\n return arr;\n}\n\n\n/**\n * @param {!Object.<string, Array.<*>>} declutterReplays Declutter replays.\n * @param {CanvasRenderingContext2D} context Context.\n * @param {number} rotation Rotation.\n */\nexport function replayDeclutter(declutterReplays, context, rotation) {\n const zs = Object.keys(declutterReplays).map(Number).sort(numberSafeCompareFunction);\n const skippedFeatureUids = {};\n for (let z = 0, zz = zs.length; z < zz; ++z) {\n const replayData = declutterReplays[zs[z].toString()];\n for (let i = 0, ii = replayData.length; i < ii;) {\n const replay = replayData[i++];\n const transform = replayData[i++];\n replay.replay(context, transform, rotation, skippedFeatureUids);\n }\n }\n}\n\n\n/**\n * @param {boolean} group Group with previous replay.\n * @return {module:ol/render/canvas~DeclutterGroup} Declutter instruction group.\n */\nCanvasReplayGroup.prototype.addDeclutter = function(group) {\n let declutter = null;\n if (this.declutterTree_) {\n if (group) {\n declutter = this.declutterGroup_;\n /** @type {number} */ (declutter[4])++;\n } else {\n declutter = this.declutterGroup_ = createEmpty();\n declutter.push(1);\n }\n }\n return declutter;\n};\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {module:ol/transform~Transform} transform Transform.\n */\nCanvasReplayGroup.prototype.clip = function(context, transform) {\n const flatClipCoords = this.getClipCoords(transform);\n context.beginPath();\n context.moveTo(flatClipCoords[0], flatClipCoords[1]);\n context.lineTo(flatClipCoords[2], flatClipCoords[3]);\n context.lineTo(flatClipCoords[4], flatClipCoords[5]);\n context.lineTo(flatClipCoords[6], flatClipCoords[7]);\n context.clip();\n};\n\n\n/**\n * @param {Array.<module:ol/render/ReplayType>} replays Replays.\n * @return {boolean} Has replays of the provided types.\n */\nCanvasReplayGroup.prototype.hasReplays = function(replays) {\n for (const zIndex in this.replaysByZIndex_) {\n const candidates = this.replaysByZIndex_[zIndex];\n for (let i = 0, ii = replays.length; i < ii; ++i) {\n if (replays[i] in candidates) {\n return true;\n }\n }\n }\n return false;\n};\n\n\n/**\n * FIXME empty description for jsdoc\n */\nCanvasReplayGroup.prototype.finish = function() {\n for (const zKey in this.replaysByZIndex_) {\n const replays = this.replaysByZIndex_[zKey];\n for (const replayKey in replays) {\n replays[replayKey].finish();\n }\n }\n};\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {number} hitTolerance Hit tolerance in pixels.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features to skip.\n * @param {function((module:ol/Feature|module:ol/render/Feature)): T} callback Feature callback.\n * @param {Object.<string, module:ol/render/canvas~DeclutterGroup>} declutterReplays Declutter replays.\n * @return {T|undefined} Callback result.\n * @template T\n */\nCanvasReplayGroup.prototype.forEachFeatureAtCoordinate = function(\n coordinate, resolution, rotation, hitTolerance, skippedFeaturesHash, callback, declutterReplays) {\n\n hitTolerance = Math.round(hitTolerance);\n const contextSize = hitTolerance * 2 + 1;\n const transform = composeTransform(this.hitDetectionTransform_,\n hitTolerance + 0.5, hitTolerance + 0.5,\n 1 / resolution, -1 / resolution,\n -rotation,\n -coordinate[0], -coordinate[1]);\n const context = this.hitDetectionContext_;\n\n if (context.canvas.width !== contextSize || context.canvas.height !== contextSize) {\n context.canvas.width = contextSize;\n context.canvas.height = contextSize;\n } else {\n context.clearRect(0, 0, contextSize, contextSize);\n }\n\n /**\n * @type {module:ol/extent~Extent}\n */\n let hitExtent;\n if (this.renderBuffer_ !== undefined) {\n hitExtent = createEmpty();\n extendCoordinate(hitExtent, coordinate);\n buffer(hitExtent, resolution * (this.renderBuffer_ + hitTolerance), hitExtent);\n }\n\n const mask = getCircleArray(hitTolerance);\n let declutteredFeatures;\n if (this.declutterTree_) {\n declutteredFeatures = this.declutterTree_.all().map(function(entry) {\n return entry.value;\n });\n }\n\n let replayType;\n\n /**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @return {?} Callback result.\n */\n function featureCallback(feature) {\n const imageData = context.getImageData(0, 0, contextSize, contextSize).data;\n for (let i = 0; i < contextSize; i++) {\n for (let j = 0; j < contextSize; j++) {\n if (mask[i][j]) {\n if (imageData[(j * contextSize + i) * 4 + 3] > 0) {\n let result;\n if (!(declutteredFeatures && (replayType == ReplayType.IMAGE || replayType == ReplayType.TEXT)) ||\n declutteredFeatures.indexOf(feature) !== -1) {\n result = callback(feature);\n }\n if (result) {\n return result;\n } else {\n context.clearRect(0, 0, contextSize, contextSize);\n return undefined;\n }\n }\n }\n }\n }\n }\n\n /** @type {Array.<number>} */\n const zs = Object.keys(this.replaysByZIndex_).map(Number);\n zs.sort(numberSafeCompareFunction);\n\n let i, j, replays, replay, result;\n for (i = zs.length - 1; i >= 0; --i) {\n const zIndexKey = zs[i].toString();\n replays = this.replaysByZIndex_[zIndexKey];\n for (j = ORDER.length - 1; j >= 0; --j) {\n replayType = ORDER[j];\n replay = replays[replayType];\n if (replay !== undefined) {\n if (declutterReplays &&\n (replayType == ReplayType.IMAGE || replayType == ReplayType.TEXT)) {\n const declutter = declutterReplays[zIndexKey];\n if (!declutter) {\n declutterReplays[zIndexKey] = [replay, transform.slice(0)];\n } else {\n declutter.push(replay, transform.slice(0));\n }\n } else {\n result = replay.replayHitDetection(context, transform, rotation,\n skippedFeaturesHash, featureCallback, hitExtent);\n if (result) {\n return result;\n }\n }\n }\n }\n }\n return undefined;\n};\n\n\n/**\n * @param {module:ol/transform~Transform} transform Transform.\n * @return {Array.<number>} Clip coordinates.\n */\nCanvasReplayGroup.prototype.getClipCoords = function(transform) {\n const maxExtent = this.maxExtent_;\n const minX = maxExtent[0];\n const minY = maxExtent[1];\n const maxX = maxExtent[2];\n const maxY = maxExtent[3];\n const flatClipCoords = [minX, minY, minX, maxY, maxX, maxY, maxX, minY];\n transform2D(\n flatClipCoords, 0, 8, 2, transform, flatClipCoords);\n return flatClipCoords;\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasReplayGroup.prototype.getReplay = function(zIndex, replayType) {\n const zIndexKey = zIndex !== undefined ? zIndex.toString() : '0';\n let replays = this.replaysByZIndex_[zIndexKey];\n if (replays === undefined) {\n replays = {};\n this.replaysByZIndex_[zIndexKey] = replays;\n }\n let replay = replays[replayType];\n if (replay === undefined) {\n const Constructor = BATCH_CONSTRUCTORS[replayType];\n replay = new Constructor(this.tolerance_, this.maxExtent_,\n this.resolution_, this.pixelRatio_, this.overlaps_, this.declutterTree_);\n replays[replayType] = replay;\n }\n return replay;\n};\n\n\n/**\n * @return {Object.<string, Object.<module:ol/render/ReplayType, module:ol/render/canvas/Replay>>} Replays.\n */\nCanvasReplayGroup.prototype.getReplays = function() {\n return this.replaysByZIndex_;\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasReplayGroup.prototype.isEmpty = function() {\n return isEmpty(this.replaysByZIndex_);\n};\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {module:ol/transform~Transform} transform Transform.\n * @param {number} viewRotation View rotation.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features to skip.\n * @param {Array.<module:ol/render/ReplayType>=} opt_replayTypes Ordered replay types to replay.\n * Default is {@link module:ol/render/replay~ORDER}\n * @param {Object.<string, module:ol/render/canvas~DeclutterGroup>=} opt_declutterReplays Declutter replays.\n */\nCanvasReplayGroup.prototype.replay = function(context,\n transform, viewRotation, skippedFeaturesHash, opt_replayTypes, opt_declutterReplays) {\n\n /** @type {Array.<number>} */\n const zs = Object.keys(this.replaysByZIndex_).map(Number);\n zs.sort(numberSafeCompareFunction);\n\n // setup clipping so that the parts of over-simplified geometries are not\n // visible outside the current extent when panning\n context.save();\n this.clip(context, transform);\n\n const replayTypes = opt_replayTypes ? opt_replayTypes : ORDER;\n let i, ii, j, jj, replays, replay;\n for (i = 0, ii = zs.length; i < ii; ++i) {\n const zIndexKey = zs[i].toString();\n replays = this.replaysByZIndex_[zIndexKey];\n for (j = 0, jj = replayTypes.length; j < jj; ++j) {\n const replayType = replayTypes[j];\n replay = replays[replayType];\n if (replay !== undefined) {\n if (opt_declutterReplays &&\n (replayType == ReplayType.IMAGE || replayType == ReplayType.TEXT)) {\n const declutter = opt_declutterReplays[zIndexKey];\n if (!declutter) {\n opt_declutterReplays[zIndexKey] = [replay, transform.slice(0)];\n } else {\n declutter.push(replay, transform.slice(0));\n }\n } else {\n replay.replay(context, transform, viewRotation, skippedFeaturesHash);\n }\n }\n }\n }\n\n context.restore();\n};\n\nexport default CanvasReplayGroup;\n","/**\n * @module ol/renderer/vector\n */\nimport {getUid} from '../util.js';\nimport ImageState from '../ImageState.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport ReplayType from '../render/ReplayType.js';\n\n\n/**\n * Tolerance for geometry simplification in device pixels.\n * @type {number}\n */\nconst SIMPLIFY_TOLERANCE = 0.5;\n\n\n/**\n * @const\n * @type {Object.<module:ol/geom/GeometryType,\n * function(module:ol/render/ReplayGroup, module:ol/geom/Geometry,\n * module:ol/style/Style, Object)>}\n */\nconst GEOMETRY_RENDERERS = {\n 'Point': renderPointGeometry,\n 'LineString': renderLineStringGeometry,\n 'Polygon': renderPolygonGeometry,\n 'MultiPoint': renderMultiPointGeometry,\n 'MultiLineString': renderMultiLineStringGeometry,\n 'MultiPolygon': renderMultiPolygonGeometry,\n 'GeometryCollection': renderGeometryCollectionGeometry,\n 'Circle': renderCircleGeometry\n};\n\n\n/**\n * @param {module:ol/Feature|module:ol/render/Feature} feature1 Feature 1.\n * @param {module:ol/Feature|module:ol/render/Feature} feature2 Feature 2.\n * @return {number} Order.\n */\nexport function defaultOrder(feature1, feature2) {\n return getUid(feature1) - getUid(feature2);\n}\n\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Squared pixel tolerance.\n */\nexport function getSquaredTolerance(resolution, pixelRatio) {\n const tolerance = getTolerance(resolution, pixelRatio);\n return tolerance * tolerance;\n}\n\n\n/**\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Pixel tolerance.\n */\nexport function getTolerance(resolution, pixelRatio) {\n return SIMPLIFY_TOLERANCE * resolution / pixelRatio;\n}\n\n\n/**\n * @param {module:ol/render/ReplayGroup} replayGroup Replay group.\n * @param {module:ol/geom/Circle} geometry Geometry.\n * @param {module:ol/style/Style} style Style.\n * @param {module:ol/Feature} feature Feature.\n */\nfunction renderCircleGeometry(replayGroup, geometry, style, feature) {\n const fillStyle = style.getFill();\n const strokeStyle = style.getStroke();\n if (fillStyle || strokeStyle) {\n const circleReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.CIRCLE);\n circleReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n circleReplay.drawCircle(geometry, feature);\n }\n const textStyle = style.getText();\n if (textStyle) {\n const textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n textReplay.drawText(geometry, feature);\n }\n}\n\n\n/**\n * @param {module:ol/render/ReplayGroup} replayGroup Replay group.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @param {module:ol/style/Style} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {function(this: T, module:ol/events/Event)} listener Listener function.\n * @param {T} thisArg Value to use as `this` when executing `listener`.\n * @return {boolean} `true` if style is loading.\n * @template T\n */\nexport function renderFeature(replayGroup, feature, style, squaredTolerance, listener, thisArg) {\n let loading = false;\n const imageStyle = style.getImage();\n if (imageStyle) {\n let imageState = imageStyle.getImageState();\n if (imageState == ImageState.LOADED || imageState == ImageState.ERROR) {\n imageStyle.unlistenImageChange(listener, thisArg);\n } else {\n if (imageState == ImageState.IDLE) {\n imageStyle.load();\n }\n imageState = imageStyle.getImageState();\n imageStyle.listenImageChange(listener, thisArg);\n loading = true;\n }\n }\n renderFeatureInternal(replayGroup, feature, style, squaredTolerance);\n\n return loading;\n}\n\n\n/**\n * @param {module:ol/render/ReplayGroup} replayGroup Replay group.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @param {module:ol/style/Style} style Style.\n * @param {number} squaredTolerance Squared tolerance.\n */\nfunction renderFeatureInternal(replayGroup, feature, style, squaredTolerance) {\n const geometry = style.getGeometryFunction()(feature);\n if (!geometry) {\n return;\n }\n const simplifiedGeometry = geometry.getSimplifiedGeometry(squaredTolerance);\n const renderer = style.getRenderer();\n if (renderer) {\n renderGeometry(replayGroup, simplifiedGeometry, style, feature);\n } else {\n const geometryRenderer = GEOMETRY_RENDERERS[simplifiedGeometry.getType()];\n geometryRenderer(replayGroup, simplifiedGeometry, style, feature);\n }\n}\n\n\n/**\n * @param {module:ol/render/ReplayGroup} replayGroup Replay group.\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/style/Style} style Style.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nfunction renderGeometry(replayGroup, geometry, style, feature) {\n if (geometry.getType() == GeometryType.GEOMETRY_COLLECTION) {\n const geometries = /** @type {module:ol/geom/GeometryCollection} */ (geometry).getGeometries();\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n renderGeometry(replayGroup, geometries[i], style, feature);\n }\n return;\n }\n const replay = replayGroup.getReplay(style.getZIndex(), ReplayType.DEFAULT);\n replay.drawCustom(/** @type {module:ol/geom/SimpleGeometry} */ (geometry), feature, style.getRenderer());\n}\n\n\n/**\n * @param {module:ol/render/ReplayGroup} replayGroup Replay group.\n * @param {module:ol/geom/GeometryCollection} geometry Geometry.\n * @param {module:ol/style/Style} style Style.\n * @param {module:ol/Feature} feature Feature.\n */\nfunction renderGeometryCollectionGeometry(replayGroup, geometry, style, feature) {\n const geometries = geometry.getGeometriesArray();\n let i, ii;\n for (i = 0, ii = geometries.length; i < ii; ++i) {\n const geometryRenderer =\n GEOMETRY_RENDERERS[geometries[i].getType()];\n geometryRenderer(replayGroup, geometries[i], style, feature);\n }\n}\n\n\n/**\n * @param {module:ol/render/ReplayGroup} replayGroup Replay group.\n * @param {module:ol/geom/LineString|module:ol/render/Feature} geometry Geometry.\n * @param {module:ol/style/Style} style Style.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nfunction renderLineStringGeometry(replayGroup, geometry, style, feature) {\n const strokeStyle = style.getStroke();\n if (strokeStyle) {\n const lineStringReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.LINE_STRING);\n lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n lineStringReplay.drawLineString(geometry, feature);\n }\n const textStyle = style.getText();\n if (textStyle) {\n const textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n textReplay.drawText(geometry, feature);\n }\n}\n\n\n/**\n * @param {module:ol/render/ReplayGroup} replayGroup Replay group.\n * @param {module:ol/geom/MultiLineString|module:ol/render/Feature} geometry Geometry.\n * @param {module:ol/style/Style} style Style.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nfunction renderMultiLineStringGeometry(replayGroup, geometry, style, feature) {\n const strokeStyle = style.getStroke();\n if (strokeStyle) {\n const lineStringReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.LINE_STRING);\n lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n lineStringReplay.drawMultiLineString(geometry, feature);\n }\n const textStyle = style.getText();\n if (textStyle) {\n const textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n textReplay.drawText(geometry, feature);\n }\n}\n\n\n/**\n * @param {module:ol/render/ReplayGroup} replayGroup Replay group.\n * @param {module:ol/geom/MultiPolygon} geometry Geometry.\n * @param {module:ol/style/Style} style Style.\n * @param {module:ol/Feature} feature Feature.\n */\nfunction renderMultiPolygonGeometry(replayGroup, geometry, style, feature) {\n const fillStyle = style.getFill();\n const strokeStyle = style.getStroke();\n if (strokeStyle || fillStyle) {\n const polygonReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.POLYGON);\n polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n polygonReplay.drawMultiPolygon(geometry, feature);\n }\n const textStyle = style.getText();\n if (textStyle) {\n const textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n textReplay.drawText(geometry, feature);\n }\n}\n\n\n/**\n * @param {module:ol/render/ReplayGroup} replayGroup Replay group.\n * @param {module:ol/geom/Point|module:ol/render/Feature} geometry Geometry.\n * @param {module:ol/style/Style} style Style.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nfunction renderPointGeometry(replayGroup, geometry, style, feature) {\n const imageStyle = style.getImage();\n if (imageStyle) {\n if (imageStyle.getImageState() != ImageState.LOADED) {\n return;\n }\n const imageReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.IMAGE);\n imageReplay.setImageStyle(imageStyle, replayGroup.addDeclutter(false));\n imageReplay.drawPoint(geometry, feature);\n }\n const textStyle = style.getText();\n if (textStyle) {\n const textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(!!imageStyle));\n textReplay.drawText(geometry, feature);\n }\n}\n\n\n/**\n * @param {module:ol/render/ReplayGroup} replayGroup Replay group.\n * @param {module:ol/geom/MultiPoint|module:ol/render/Feature} geometry Geometry.\n * @param {module:ol/style/Style} style Style.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nfunction renderMultiPointGeometry(replayGroup, geometry, style, feature) {\n const imageStyle = style.getImage();\n if (imageStyle) {\n if (imageStyle.getImageState() != ImageState.LOADED) {\n return;\n }\n const imageReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.IMAGE);\n imageReplay.setImageStyle(imageStyle, replayGroup.addDeclutter(false));\n imageReplay.drawMultiPoint(geometry, feature);\n }\n const textStyle = style.getText();\n if (textStyle) {\n const textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(!!imageStyle));\n textReplay.drawText(geometry, feature);\n }\n}\n\n\n/**\n * @param {module:ol/render/ReplayGroup} replayGroup Replay group.\n * @param {module:ol/geom/Polygon|module:ol/render/Feature} geometry Geometry.\n * @param {module:ol/style/Style} style Style.\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n */\nfunction renderPolygonGeometry(replayGroup, geometry, style, feature) {\n const fillStyle = style.getFill();\n const strokeStyle = style.getStroke();\n if (fillStyle || strokeStyle) {\n const polygonReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.POLYGON);\n polygonReplay.setFillStrokeStyle(fillStyle, strokeStyle);\n polygonReplay.drawPolygon(geometry, feature);\n }\n const textStyle = style.getText();\n if (textStyle) {\n const textReplay = replayGroup.getReplay(style.getZIndex(), ReplayType.TEXT);\n textReplay.setTextStyle(textStyle, replayGroup.addDeclutter(false));\n textReplay.drawText(geometry, feature);\n }\n}\n","/**\n * @module ol/renderer/canvas/VectorLayer\n */\nimport {getUid, inherits} from '../../util.js';\nimport LayerType from '../../LayerType.js';\nimport ViewHint from '../../ViewHint.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {listen, unlisten} from '../../events.js';\nimport EventType from '../../events/EventType.js';\nimport rbush from 'rbush';\nimport {buffer, createEmpty, containsExtent, getWidth} from '../../extent.js';\nimport RenderEventType from '../../render/EventType.js';\nimport {labelCache, rotateAtOffset} from '../../render/canvas.js';\nimport CanvasReplayGroup from '../../render/canvas/ReplayGroup.js';\nimport CanvasLayerRenderer from '../canvas/Layer.js';\nimport {defaultOrder as defaultRenderOrder, getTolerance as getRenderTolerance, getSquaredTolerance as getSquaredRenderTolerance, renderFeature} from '../vector.js';\n\n/**\n * @constructor\n * @extends {module:ol/renderer/canvas/Layer}\n * @param {module:ol/layer/Vector} vectorLayer Vector layer.\n * @api\n */\nconst CanvasVectorLayerRenderer = function(vectorLayer) {\n\n CanvasLayerRenderer.call(this, vectorLayer);\n\n /**\n * Declutter tree.\n * @private\n */\n this.declutterTree_ = vectorLayer.getDeclutter() ? rbush(9, undefined) : null;\n\n /**\n * @private\n * @type {boolean}\n */\n this.dirty_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.renderedRevision_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.renderedResolution_ = NaN;\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.renderedExtent_ = createEmpty();\n\n /**\n * @private\n * @type {function(module:ol/Feature, module:ol/Feature): number|null}\n */\n this.renderedRenderOrder_ = null;\n\n /**\n * @private\n * @type {module:ol/render/canvas/ReplayGroup}\n */\n this.replayGroup_ = null;\n\n /**\n * A new replay group had to be created by `prepareFrame()`\n * @type {boolean}\n */\n this.replayGroupChanged = true;\n\n /**\n * @type {CanvasRenderingContext2D}\n */\n this.context = createCanvasContext2D();\n\n listen(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);\n\n};\n\ninherits(CanvasVectorLayerRenderer, CanvasLayerRenderer);\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {module:ol/layer/Layer} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nCanvasVectorLayerRenderer['handles'] = function(layer) {\n return layer.getType() === LayerType.VECTOR;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {module:ol/renderer/Map} mapRenderer The map renderer.\n * @param {module:ol/layer/Layer} layer The layer to be rendererd.\n * @return {module:ol/renderer/canvas/VectorLayer} The layer renderer.\n */\nCanvasVectorLayerRenderer['create'] = function(mapRenderer, layer) {\n return new CanvasVectorLayerRenderer(/** @type {module:ol/layer/Vector} */ (layer));\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasVectorLayerRenderer.prototype.disposeInternal = function() {\n unlisten(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);\n CanvasLayerRenderer.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * @param {CanvasRenderingContext2D} context Context.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {module:ol/layer/Layer~State} layerState Layer state.\n */\nCanvasVectorLayerRenderer.prototype.compose = function(context, frameState, layerState) {\n const extent = frameState.extent;\n const pixelRatio = frameState.pixelRatio;\n const skippedFeatureUids = layerState.managed ?\n frameState.skippedFeatureUids : {};\n const viewState = frameState.viewState;\n const projection = viewState.projection;\n const rotation = viewState.rotation;\n const projectionExtent = projection.getExtent();\n const vectorSource = /** @type {module:ol/source/Vector} */ (this.getLayer().getSource());\n\n let transform = this.getTransform(frameState, 0);\n\n // clipped rendering if layer extent is set\n const clipExtent = layerState.extent;\n const clipped = clipExtent !== undefined;\n if (clipped) {\n this.clip(context, frameState, /** @type {module:ol/extent~Extent} */ (clipExtent));\n }\n const replayGroup = this.replayGroup_;\n if (replayGroup && !replayGroup.isEmpty()) {\n if (this.declutterTree_) {\n this.declutterTree_.clear();\n }\n const layer = /** @type {module:ol/layer/Vector} */ (this.getLayer());\n let drawOffsetX = 0;\n let drawOffsetY = 0;\n let replayContext;\n const transparentLayer = layerState.opacity !== 1;\n const hasRenderListeners = layer.hasListener(RenderEventType.RENDER);\n if (transparentLayer || hasRenderListeners) {\n let drawWidth = context.canvas.width;\n let drawHeight = context.canvas.height;\n if (rotation) {\n const drawSize = Math.round(Math.sqrt(drawWidth * drawWidth + drawHeight * drawHeight));\n drawOffsetX = (drawSize - drawWidth) / 2;\n drawOffsetY = (drawSize - drawHeight) / 2;\n drawWidth = drawHeight = drawSize;\n }\n // resize and clear\n this.context.canvas.width = drawWidth;\n this.context.canvas.height = drawHeight;\n replayContext = this.context;\n } else {\n replayContext = context;\n }\n\n const alpha = replayContext.globalAlpha;\n if (!transparentLayer) {\n // for performance reasons, context.save / context.restore is not used\n // to save and restore the transformation matrix and the opacity.\n // see http://jsperf.com/context-save-restore-versus-variable\n replayContext.globalAlpha = layerState.opacity;\n }\n\n if (replayContext != context) {\n replayContext.translate(drawOffsetX, drawOffsetY);\n }\n\n const width = frameState.size[0] * pixelRatio;\n const height = frameState.size[1] * pixelRatio;\n rotateAtOffset(replayContext, -rotation,\n width / 2, height / 2);\n replayGroup.replay(replayContext, transform, rotation, skippedFeatureUids);\n if (vectorSource.getWrapX() && projection.canWrapX() &&\n !containsExtent(projectionExtent, extent)) {\n let startX = extent[0];\n const worldWidth = getWidth(projectionExtent);\n let world = 0;\n let offsetX;\n while (startX < projectionExtent[0]) {\n --world;\n offsetX = worldWidth * world;\n transform = this.getTransform(frameState, offsetX);\n replayGroup.replay(replayContext, transform, rotation, skippedFeatureUids);\n startX += worldWidth;\n }\n world = 0;\n startX = extent[2];\n while (startX > projectionExtent[2]) {\n ++world;\n offsetX = worldWidth * world;\n transform = this.getTransform(frameState, offsetX);\n replayGroup.replay(replayContext, transform, rotation, skippedFeatureUids);\n startX -= worldWidth;\n }\n }\n rotateAtOffset(replayContext, rotation,\n width / 2, height / 2);\n\n if (replayContext != context) {\n if (hasRenderListeners) {\n this.dispatchRenderEvent(replayContext, frameState, transform);\n }\n if (transparentLayer) {\n const mainContextAlpha = context.globalAlpha;\n context.globalAlpha = layerState.opacity;\n context.drawImage(replayContext.canvas, -drawOffsetX, -drawOffsetY);\n context.globalAlpha = mainContextAlpha;\n } else {\n context.drawImage(replayContext.canvas, -drawOffsetX, -drawOffsetY);\n }\n replayContext.translate(-drawOffsetX, -drawOffsetY);\n }\n\n if (!transparentLayer) {\n replayContext.globalAlpha = alpha;\n }\n }\n\n if (clipped) {\n context.restore();\n }\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasVectorLayerRenderer.prototype.composeFrame = function(frameState, layerState, context) {\n const transform = this.getTransform(frameState, 0);\n this.preCompose(context, frameState, transform);\n this.compose(context, frameState, layerState);\n this.postCompose(context, frameState, layerState, transform);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasVectorLayerRenderer.prototype.forEachFeatureAtCoordinate = function(coordinate, frameState, hitTolerance, callback, thisArg) {\n if (!this.replayGroup_) {\n return undefined;\n } else {\n const resolution = frameState.viewState.resolution;\n const rotation = frameState.viewState.rotation;\n const layer = /** @type {module:ol/layer/Vector} */ (this.getLayer());\n /** @type {!Object.<string, boolean>} */\n const features = {};\n const result = this.replayGroup_.forEachFeatureAtCoordinate(coordinate, resolution, rotation, hitTolerance, {},\n /**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @return {?} Callback result.\n */\n function(feature) {\n const key = getUid(feature).toString();\n if (!(key in features)) {\n features[key] = true;\n return callback.call(thisArg, feature, layer);\n }\n }, null);\n return result;\n }\n};\n\n\n/**\n * @param {module:ol/events/Event} event Event.\n */\nCanvasVectorLayerRenderer.prototype.handleFontsChanged_ = function(event) {\n const layer = this.getLayer();\n if (layer.getVisible() && this.replayGroup_) {\n layer.changed();\n }\n};\n\n\n/**\n * Handle changes in image style state.\n * @param {module:ol/events/Event} event Image style change event.\n * @private\n */\nCanvasVectorLayerRenderer.prototype.handleStyleImageChange_ = function(event) {\n this.renderIfReadyAndVisible();\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasVectorLayerRenderer.prototype.prepareFrame = function(frameState, layerState) {\n const vectorLayer = /** @type {module:ol/layer/Vector} */ (this.getLayer());\n const vectorSource = vectorLayer.getSource();\n\n const animating = frameState.viewHints[ViewHint.ANIMATING];\n const interacting = frameState.viewHints[ViewHint.INTERACTING];\n const updateWhileAnimating = vectorLayer.getUpdateWhileAnimating();\n const updateWhileInteracting = vectorLayer.getUpdateWhileInteracting();\n\n if (!this.dirty_ && (!updateWhileAnimating && animating) ||\n (!updateWhileInteracting && interacting)) {\n return true;\n }\n\n const frameStateExtent = frameState.extent;\n const viewState = frameState.viewState;\n const projection = viewState.projection;\n const resolution = viewState.resolution;\n const pixelRatio = frameState.pixelRatio;\n const vectorLayerRevision = vectorLayer.getRevision();\n const vectorLayerRenderBuffer = vectorLayer.getRenderBuffer();\n let vectorLayerRenderOrder = vectorLayer.getRenderOrder();\n\n if (vectorLayerRenderOrder === undefined) {\n vectorLayerRenderOrder = defaultRenderOrder;\n }\n\n const extent = buffer(frameStateExtent,\n vectorLayerRenderBuffer * resolution);\n const projectionExtent = viewState.projection.getExtent();\n\n if (vectorSource.getWrapX() && viewState.projection.canWrapX() &&\n !containsExtent(projectionExtent, frameState.extent)) {\n // For the replay group, we need an extent that intersects the real world\n // (-180° to +180°). To support geometries in a coordinate range from -540°\n // to +540°, we add at least 1 world width on each side of the projection\n // extent. If the viewport is wider than the world, we need to add half of\n // the viewport width to make sure we cover the whole viewport.\n const worldWidth = getWidth(projectionExtent);\n const gutter = Math.max(getWidth(extent) / 2, worldWidth);\n extent[0] = projectionExtent[0] - gutter;\n extent[2] = projectionExtent[2] + gutter;\n }\n\n if (!this.dirty_ &&\n this.renderedResolution_ == resolution &&\n this.renderedRevision_ == vectorLayerRevision &&\n this.renderedRenderOrder_ == vectorLayerRenderOrder &&\n containsExtent(this.renderedExtent_, extent)) {\n this.replayGroupChanged = false;\n return true;\n }\n\n this.replayGroup_ = null;\n\n this.dirty_ = false;\n\n const replayGroup = new CanvasReplayGroup(\n getRenderTolerance(resolution, pixelRatio), extent, resolution,\n pixelRatio, vectorSource.getOverlaps(), this.declutterTree_, vectorLayer.getRenderBuffer());\n vectorSource.loadFeatures(extent, resolution, projection);\n /**\n * @param {module:ol/Feature} feature Feature.\n * @this {module:ol/renderer/canvas/VectorLayer}\n */\n const render = function(feature) {\n let styles;\n const styleFunction = feature.getStyleFunction() || vectorLayer.getStyleFunction();\n if (styleFunction) {\n styles = styleFunction(feature, resolution);\n }\n if (styles) {\n const dirty = this.renderFeature(\n feature, resolution, pixelRatio, styles, replayGroup);\n this.dirty_ = this.dirty_ || dirty;\n }\n }.bind(this);\n if (vectorLayerRenderOrder) {\n /** @type {Array.<module:ol/Feature>} */\n const features = [];\n vectorSource.forEachFeatureInExtent(extent,\n /**\n * @param {module:ol/Feature} feature Feature.\n */\n function(feature) {\n features.push(feature);\n }, this);\n features.sort(vectorLayerRenderOrder);\n for (let i = 0, ii = features.length; i < ii; ++i) {\n render(features[i]);\n }\n } else {\n vectorSource.forEachFeatureInExtent(extent, render, this);\n }\n replayGroup.finish();\n\n this.renderedResolution_ = resolution;\n this.renderedRevision_ = vectorLayerRevision;\n this.renderedRenderOrder_ = vectorLayerRenderOrder;\n this.renderedExtent_ = extent;\n this.replayGroup_ = replayGroup;\n\n this.replayGroupChanged = true;\n return true;\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {(module:ol/style/Style|Array.<module:ol/style/Style>)} styles The style or array of styles.\n * @param {module:ol/render/canvas/ReplayGroup} replayGroup Replay group.\n * @return {boolean} `true` if an image is loading.\n */\nCanvasVectorLayerRenderer.prototype.renderFeature = function(feature, resolution, pixelRatio, styles, replayGroup) {\n if (!styles) {\n return false;\n }\n let loading = false;\n if (Array.isArray(styles)) {\n for (let i = 0, ii = styles.length; i < ii; ++i) {\n loading = renderFeature(\n replayGroup, feature, styles[i],\n getSquaredRenderTolerance(resolution, pixelRatio),\n this.handleStyleImageChange_, this) || loading;\n }\n } else {\n loading = renderFeature(\n replayGroup, feature, styles,\n getSquaredRenderTolerance(resolution, pixelRatio),\n this.handleStyleImageChange_, this);\n }\n return loading;\n};\nexport default CanvasVectorLayerRenderer;\n","/**\n * @module ol/layer/VectorTileRenderType\n */\n\n/**\n * @enum {string}\n * Render mode for vector tiles:\n * * `'image'`: Vector tiles are rendered as images. Great performance, but\n * point symbols and texts are always rotated with the view and pixels are\n * scaled during zoom animations.\n * * `'hybrid'`: Polygon and line elements are rendered as images, so pixels\n * are scaled during zoom animations. Point symbols and texts are accurately\n * rendered as vectors and can stay upright on rotated views.\n * * `'vector'`: Vector tiles are rendered as vectors. Most accurate rendering\n * even during animations, but slower performance than the other options.\n * @api\n */\nexport default {\n IMAGE: 'image',\n HYBRID: 'hybrid',\n VECTOR: 'vector'\n};\n","/**\n * @module ol/renderer/canvas/VectorTileLayer\n */\nimport {getUid, inherits} from '../../util.js';\nimport LayerType from '../../LayerType.js';\nimport TileState from '../../TileState.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {listen, unlisten} from '../../events.js';\nimport EventType from '../../events/EventType.js';\nimport rbush from 'rbush';\nimport {buffer, containsCoordinate, equals, getIntersection, getTopLeft, intersects} from '../../extent.js';\nimport VectorTileRenderType from '../../layer/VectorTileRenderType.js';\nimport {equivalent as equivalentProjection} from '../../proj.js';\nimport Units from '../../proj/Units.js';\nimport ReplayType from '../../render/ReplayType.js';\nimport {labelCache, rotateAtOffset} from '../../render/canvas.js';\nimport CanvasReplayGroup, {replayDeclutter} from '../../render/canvas/ReplayGroup.js';\nimport {ORDER} from '../../render/replay.js';\nimport CanvasTileLayerRenderer from '../canvas/TileLayer.js';\nimport {getSquaredTolerance as getSquaredRenderTolerance, renderFeature} from '../vector.js';\nimport {\n create as createTransform,\n compose as composeTransform,\n reset as resetTransform,\n scale as scaleTransform,\n translate as translateTransform\n} from '../../transform.js';\n\n\n/**\n * @type {!Object.<string, Array.<module:ol/render/ReplayType>>}\n */\nconst IMAGE_REPLAYS = {\n 'image': [ReplayType.POLYGON, ReplayType.CIRCLE,\n ReplayType.LINE_STRING, ReplayType.IMAGE, ReplayType.TEXT],\n 'hybrid': [ReplayType.POLYGON, ReplayType.LINE_STRING]\n};\n\n\n/**\n * @type {!Object.<string, Array.<module:ol/render/ReplayType>>}\n */\nconst VECTOR_REPLAYS = {\n 'image': [ReplayType.DEFAULT],\n 'hybrid': [ReplayType.IMAGE, ReplayType.TEXT, ReplayType.DEFAULT],\n 'vector': ORDER\n};\n\n\n/**\n * @constructor\n * @extends {module:ol/renderer/canvas/TileLayer}\n * @param {module:ol/layer/VectorTile} layer VectorTile layer.\n * @api\n */\nconst CanvasVectorTileLayerRenderer = function(layer) {\n\n /**\n * @type {CanvasRenderingContext2D}\n */\n this.context = null;\n\n CanvasTileLayerRenderer.call(this, layer);\n\n /**\n * Declutter tree.\n * @private\n */\n this.declutterTree_ = layer.getDeclutter() ? rbush(9, undefined) : null;\n\n /**\n * @private\n * @type {boolean}\n */\n this.dirty_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.renderedLayerRevision_;\n\n /**\n * @private\n * @type {module:ol/transform~Transform}\n */\n this.tmpTransform_ = createTransform();\n\n // Use lower resolution for pure vector rendering. Closest resolution otherwise.\n this.zDirection = layer.getRenderMode() == VectorTileRenderType.VECTOR ? 1 : 0;\n\n listen(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);\n\n};\n\ninherits(CanvasVectorTileLayerRenderer, CanvasTileLayerRenderer);\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {module:ol/layer/Layer} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nCanvasVectorTileLayerRenderer['handles'] = function(layer) {\n return layer.getType() === LayerType.VECTOR_TILE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {module:ol/renderer/Map} mapRenderer The map renderer.\n * @param {module:ol/layer/Layer} layer The layer to be rendererd.\n * @return {module:ol/renderer/canvas/VectorTileLayer} The layer renderer.\n */\nCanvasVectorTileLayerRenderer['create'] = function(mapRenderer, layer) {\n return new CanvasVectorTileLayerRenderer(/** @type {module:ol/layer/VectorTile} */ (layer));\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasVectorTileLayerRenderer.prototype.disposeInternal = function() {\n unlisten(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);\n CanvasTileLayerRenderer.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasVectorTileLayerRenderer.prototype.getTile = function(z, x, y, pixelRatio, projection) {\n const tile = CanvasTileLayerRenderer.prototype.getTile.call(this, z, x, y, pixelRatio, projection);\n if (tile.getState() === TileState.LOADED) {\n this.createReplayGroup_(tile, pixelRatio, projection);\n if (this.context) {\n this.renderTileImage_(tile, pixelRatio, projection);\n }\n }\n return tile;\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasVectorTileLayerRenderer.prototype.prepareFrame = function(frameState, layerState) {\n const layer = this.getLayer();\n const layerRevision = layer.getRevision();\n if (this.renderedLayerRevision_ != layerRevision) {\n this.renderedTiles.length = 0;\n const renderMode = layer.getRenderMode();\n if (!this.context && renderMode != VectorTileRenderType.VECTOR) {\n this.context = createCanvasContext2D();\n }\n if (this.context && renderMode == VectorTileRenderType.VECTOR) {\n this.context = null;\n }\n }\n this.renderedLayerRevision_ = layerRevision;\n return CanvasTileLayerRenderer.prototype.prepareFrame.apply(this, arguments);\n};\n\n\n/**\n * @param {module:ol/VectorImageTile} tile Tile.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @private\n */\nCanvasVectorTileLayerRenderer.prototype.createReplayGroup_ = function(tile, pixelRatio, projection) {\n const layer = this.getLayer();\n const revision = layer.getRevision();\n const renderOrder = /** @type {module:ol/render~OrderFunction} */ (layer.getRenderOrder()) || null;\n\n const replayState = tile.getReplayState(layer);\n if (!replayState.dirty && replayState.renderedRevision == revision &&\n replayState.renderedRenderOrder == renderOrder) {\n return;\n }\n\n const source = /** @type {module:ol/source/VectorTile} */ (layer.getSource());\n const sourceTileGrid = source.getTileGrid();\n const tileGrid = source.getTileGridForProjection(projection);\n const resolution = tileGrid.getResolution(tile.tileCoord[0]);\n const tileExtent = tile.extent;\n\n const zIndexKeys = {};\n for (let t = 0, tt = tile.tileKeys.length; t < tt; ++t) {\n const sourceTile = tile.getTile(tile.tileKeys[t]);\n if (sourceTile.getState() != TileState.LOADED) {\n continue;\n }\n\n const sourceTileCoord = sourceTile.tileCoord;\n const sourceTileExtent = sourceTileGrid.getTileCoordExtent(sourceTileCoord);\n const sharedExtent = getIntersection(tileExtent, sourceTileExtent);\n const bufferedExtent = equals(sourceTileExtent, sharedExtent) ? null :\n buffer(sharedExtent, layer.getRenderBuffer() * resolution, this.tmpExtent);\n const tileProjection = sourceTile.getProjection();\n let reproject = false;\n if (!equivalentProjection(projection, tileProjection)) {\n reproject = true;\n sourceTile.setProjection(projection);\n }\n replayState.dirty = false;\n const replayGroup = new CanvasReplayGroup(0, sharedExtent, resolution,\n pixelRatio, source.getOverlaps(), this.declutterTree_, layer.getRenderBuffer());\n const squaredTolerance = getSquaredRenderTolerance(resolution, pixelRatio);\n\n /**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @this {module:ol/renderer/canvas/VectorTileLayer}\n */\n const render = function(feature) {\n let styles;\n const styleFunction = feature.getStyleFunction() || layer.getStyleFunction();\n if (styleFunction) {\n styles = styleFunction(feature, resolution);\n }\n if (styles) {\n const dirty = this.renderFeature(feature, squaredTolerance, styles, replayGroup);\n this.dirty_ = this.dirty_ || dirty;\n replayState.dirty = replayState.dirty || dirty;\n }\n };\n\n const features = sourceTile.getFeatures();\n if (renderOrder && renderOrder !== replayState.renderedRenderOrder) {\n features.sort(renderOrder);\n }\n for (let i = 0, ii = features.length; i < ii; ++i) {\n const feature = features[i];\n if (reproject) {\n if (tileProjection.getUnits() == Units.TILE_PIXELS) {\n // projected tile extent\n tileProjection.setWorldExtent(sourceTileExtent);\n // tile extent in tile pixel space\n tileProjection.setExtent(sourceTile.getExtent());\n }\n feature.getGeometry().transform(tileProjection, projection);\n }\n if (!bufferedExtent || intersects(bufferedExtent, feature.getGeometry().getExtent())) {\n render.call(this, feature);\n }\n }\n replayGroup.finish();\n for (const r in replayGroup.getReplays()) {\n zIndexKeys[r] = true;\n }\n sourceTile.setReplayGroup(layer, tile.tileCoord.toString(), replayGroup);\n }\n replayState.renderedRevision = revision;\n replayState.renderedRenderOrder = renderOrder;\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasVectorTileLayerRenderer.prototype.forEachFeatureAtCoordinate = function(coordinate, frameState, hitTolerance, callback, thisArg) {\n const resolution = frameState.viewState.resolution;\n const rotation = frameState.viewState.rotation;\n hitTolerance = hitTolerance == undefined ? 0 : hitTolerance;\n const layer = this.getLayer();\n /** @type {!Object.<string, boolean>} */\n const features = {};\n\n /** @type {Array.<module:ol/VectorImageTile>} */\n const renderedTiles = this.renderedTiles;\n\n let bufferedExtent, found;\n let i, ii, replayGroup;\n for (i = 0, ii = renderedTiles.length; i < ii; ++i) {\n const tile = renderedTiles[i];\n bufferedExtent = buffer(tile.extent, hitTolerance * resolution, bufferedExtent);\n if (!containsCoordinate(bufferedExtent, coordinate)) {\n continue;\n }\n for (let t = 0, tt = tile.tileKeys.length; t < tt; ++t) {\n const sourceTile = tile.getTile(tile.tileKeys[t]);\n if (sourceTile.getState() != TileState.LOADED) {\n continue;\n }\n replayGroup = sourceTile.getReplayGroup(layer, tile.tileCoord.toString());\n found = found || replayGroup.forEachFeatureAtCoordinate(coordinate, resolution, rotation, hitTolerance, {},\n /**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @return {?} Callback result.\n */\n function(feature) {\n const key = getUid(feature).toString();\n if (!(key in features)) {\n features[key] = true;\n return callback.call(thisArg, feature, layer);\n }\n }, null);\n }\n }\n return found;\n};\n\n\n/**\n * @param {module:ol/VectorTile} tile Tile.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @return {module:ol/transform~Transform} transform Transform.\n * @private\n */\nCanvasVectorTileLayerRenderer.prototype.getReplayTransform_ = function(tile, frameState) {\n const layer = this.getLayer();\n const source = /** @type {module:ol/source/VectorTile} */ (layer.getSource());\n const tileGrid = source.getTileGrid();\n const tileCoord = tile.tileCoord;\n const tileResolution = tileGrid.getResolution(tileCoord[0]);\n const viewState = frameState.viewState;\n const pixelRatio = frameState.pixelRatio;\n const renderResolution = viewState.resolution / pixelRatio;\n const tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent);\n const center = viewState.center;\n const origin = getTopLeft(tileExtent);\n const size = frameState.size;\n const offsetX = Math.round(pixelRatio * size[0] / 2);\n const offsetY = Math.round(pixelRatio * size[1] / 2);\n return composeTransform(this.tmpTransform_,\n offsetX, offsetY,\n tileResolution / renderResolution, tileResolution / renderResolution,\n viewState.rotation,\n (origin[0] - center[0]) / tileResolution,\n (center[1] - origin[1]) / tileResolution);\n};\n\n\n/**\n * @param {module:ol/events/Event} event Event.\n */\nCanvasVectorTileLayerRenderer.prototype.handleFontsChanged_ = function(event) {\n const layer = this.getLayer();\n if (layer.getVisible() && this.renderedLayerRevision_ !== undefined) {\n layer.changed();\n }\n};\n\n\n/**\n * Handle changes in image style state.\n * @param {module:ol/events/Event} event Image style change event.\n * @private\n */\nCanvasVectorTileLayerRenderer.prototype.handleStyleImageChange_ = function(event) {\n this.renderIfReadyAndVisible();\n};\n\n\n/**\n * @inheritDoc\n */\nCanvasVectorTileLayerRenderer.prototype.postCompose = function(context, frameState, layerState) {\n const layer = this.getLayer();\n const renderMode = layer.getRenderMode();\n if (renderMode != VectorTileRenderType.IMAGE) {\n const declutterReplays = layer.getDeclutter() ? {} : null;\n const source = /** @type {module:ol/source/VectorTile} */ (layer.getSource());\n const replayTypes = VECTOR_REPLAYS[renderMode];\n const pixelRatio = frameState.pixelRatio;\n const rotation = frameState.viewState.rotation;\n const size = frameState.size;\n let offsetX, offsetY;\n if (rotation) {\n offsetX = Math.round(pixelRatio * size[0] / 2);\n offsetY = Math.round(pixelRatio * size[1] / 2);\n rotateAtOffset(context, -rotation, offsetX, offsetY);\n }\n if (declutterReplays) {\n this.declutterTree_.clear();\n }\n const tiles = this.renderedTiles;\n const tileGrid = source.getTileGridForProjection(frameState.viewState.projection);\n const clips = [];\n const zs = [];\n for (let i = tiles.length - 1; i >= 0; --i) {\n const tile = /** @type {module:ol/VectorImageTile} */ (tiles[i]);\n if (tile.getState() == TileState.ABORT) {\n continue;\n }\n const tileCoord = tile.tileCoord;\n const worldOffset = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent)[0] - tile.extent[0];\n let transform = undefined;\n for (let t = 0, tt = tile.tileKeys.length; t < tt; ++t) {\n const sourceTile = tile.getTile(tile.tileKeys[t]);\n if (sourceTile.getState() != TileState.LOADED) {\n continue;\n }\n const replayGroup = sourceTile.getReplayGroup(layer, tileCoord.toString());\n if (!replayGroup || !replayGroup.hasReplays(replayTypes)) {\n // sourceTile was not yet loaded when this.createReplayGroup_() was\n // called, or it has no replays of the types we want to render\n continue;\n }\n if (!transform) {\n transform = this.getTransform(frameState, worldOffset);\n }\n const currentZ = sourceTile.tileCoord[0];\n const currentClip = replayGroup.getClipCoords(transform);\n context.save();\n context.globalAlpha = layerState.opacity;\n // Create a clip mask for regions in this low resolution tile that are\n // already filled by a higher resolution tile\n for (let j = 0, jj = clips.length; j < jj; ++j) {\n const clip = clips[j];\n if (currentZ < zs[j]) {\n context.beginPath();\n // counter-clockwise (outer ring) for current tile\n context.moveTo(currentClip[0], currentClip[1]);\n context.lineTo(currentClip[2], currentClip[3]);\n context.lineTo(currentClip[4], currentClip[5]);\n context.lineTo(currentClip[6], currentClip[7]);\n // clockwise (inner ring) for higher resolution tile\n context.moveTo(clip[6], clip[7]);\n context.lineTo(clip[4], clip[5]);\n context.lineTo(clip[2], clip[3]);\n context.lineTo(clip[0], clip[1]);\n context.clip();\n }\n }\n replayGroup.replay(context, transform, rotation, {}, replayTypes, declutterReplays);\n context.restore();\n clips.push(currentClip);\n zs.push(currentZ);\n }\n }\n if (declutterReplays) {\n replayDeclutter(declutterReplays, context, rotation);\n }\n if (rotation) {\n rotateAtOffset(context, rotation,\n /** @type {number} */ (offsetX), /** @type {number} */ (offsetY));\n }\n }\n CanvasTileLayerRenderer.prototype.postCompose.apply(this, arguments);\n};\n\n\n/**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @param {number} squaredTolerance Squared tolerance.\n * @param {(module:ol/style/Style|Array.<module:ol/style/Style>)} styles The style or array of styles.\n * @param {module:ol/render/canvas/ReplayGroup} replayGroup Replay group.\n * @return {boolean} `true` if an image is loading.\n */\nCanvasVectorTileLayerRenderer.prototype.renderFeature = function(feature, squaredTolerance, styles, replayGroup) {\n if (!styles) {\n return false;\n }\n let loading = false;\n if (Array.isArray(styles)) {\n for (let i = 0, ii = styles.length; i < ii; ++i) {\n loading = renderFeature(\n replayGroup, feature, styles[i], squaredTolerance,\n this.handleStyleImageChange_, this) || loading;\n }\n } else {\n loading = renderFeature(\n replayGroup, feature, styles, squaredTolerance,\n this.handleStyleImageChange_, this);\n }\n return loading;\n};\n\n\n/**\n * @param {module:ol/VectorImageTile} tile Tile.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @private\n */\nCanvasVectorTileLayerRenderer.prototype.renderTileImage_ = function(\n tile, pixelRatio, projection) {\n const layer = this.getLayer();\n const replayState = tile.getReplayState(layer);\n const revision = layer.getRevision();\n const replays = IMAGE_REPLAYS[layer.getRenderMode()];\n if (replays && replayState.renderedTileRevision !== revision) {\n replayState.renderedTileRevision = revision;\n const tileCoord = tile.wrappedTileCoord;\n const z = tileCoord[0];\n const source = /** @type {module:ol/source/VectorTile} */ (layer.getSource());\n const tileGrid = source.getTileGridForProjection(projection);\n const resolution = tileGrid.getResolution(z);\n const context = tile.getContext(layer);\n const size = source.getTilePixelSize(z, pixelRatio, projection);\n context.canvas.width = size[0];\n context.canvas.height = size[1];\n const tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent);\n for (let i = 0, ii = tile.tileKeys.length; i < ii; ++i) {\n const sourceTile = tile.getTile(tile.tileKeys[i]);\n if (sourceTile.getState() != TileState.LOADED) {\n continue;\n }\n const pixelScale = pixelRatio / resolution;\n const transform = resetTransform(this.tmpTransform_);\n scaleTransform(transform, pixelScale, -pixelScale);\n translateTransform(transform, -tileExtent[0], -tileExtent[3]);\n const replayGroup = sourceTile.getReplayGroup(layer, tile.tileCoord.toString());\n replayGroup.replay(context, transform, 0, {}, replays);\n }\n }\n};\n\nexport default CanvasVectorTileLayerRenderer;\n","/**\n * @module ol/Map\n */\nimport {inherits} from './util.js';\nimport PluggableMap from './PluggableMap.js';\nimport {defaults as defaultControls} from './control/util.js';\nimport {defaults as defaultInteractions} from './interaction.js';\nimport {assign} from './obj.js';\nimport CanvasImageLayerRenderer from './renderer/canvas/ImageLayer.js';\nimport CanvasMapRenderer from './renderer/canvas/Map.js';\nimport CanvasTileLayerRenderer from './renderer/canvas/TileLayer.js';\nimport CanvasVectorLayerRenderer from './renderer/canvas/VectorLayer.js';\nimport CanvasVectorTileLayerRenderer from './renderer/canvas/VectorTileLayer.js';\n\n/**\n * @classdesc\n * The map is the core component of OpenLayers. For a map to render, a view,\n * one or more layers, and a target container are needed:\n *\n * import Map from 'ol/Map';\n * import View from 'ol/View';\n * import TileLayer from 'ol/layer/Tile';\n * import OSM from 'ol/source/OSM';\n *\n * var map = new Map({\n * view: new View({\n * center: [0, 0],\n * zoom: 1\n * }),\n * layers: [\n * new TileLayer({\n * source: new OSM()\n * })\n * ],\n * target: 'map'\n * });\n *\n * The above snippet creates a map using a {@link module:ol/layer/Tile} to\n * display {@link module:ol/source/OSM~OSM} OSM data and render it to a DOM\n * element with the id `map`.\n *\n * The constructor places a viewport container (with CSS class name\n * `ol-viewport`) in the target element (see `getViewport()`), and then two\n * further elements within the viewport: one with CSS class name\n * `ol-overlaycontainer-stopevent` for controls and some overlays, and one with\n * CSS class name `ol-overlaycontainer` for other overlays (see the `stopEvent`\n * option of {@link module:ol/Overlay~Overlay} for the difference). The map\n * itself is placed in a further element within the viewport.\n *\n * Layers are stored as a {@link module:ol/Collection~Collection} in\n * layerGroups. A top-level group is provided by the library. This is what is\n * accessed by `getLayerGroup` and `setLayerGroup`. Layers entered in the\n * options are added to this group, and `addLayer` and `removeLayer` change the\n * layer collection in the group. `getLayers` is a convenience function for\n * `getLayerGroup().getLayers()`. Note that {@link module:ol/layer/Group~Group}\n * is a subclass of {@link module:ol/layer/Base}, so layers entered in the\n * options or added with `addLayer` can be groups, which can contain further\n * groups, and so on.\n *\n * @constructor\n * @extends {module:ol/PluggableMap}\n * @param {module:ol/PluggableMap~MapOptions} options Map options.\n * @fires module:ol/MapBrowserEvent~MapBrowserEvent\n * @fires module:ol/MapEvent~MapEvent\n * @fires module:ol/render/Event~RenderEvent#postcompose\n * @fires module:ol/render/Event~RenderEvent#precompose\n * @api\n */\nconst Map = function(options) {\n options = assign({}, options);\n if (!options.controls) {\n options.controls = defaultControls();\n }\n if (!options.interactions) {\n options.interactions = defaultInteractions();\n }\n\n PluggableMap.call(this, options);\n};\n\ninherits(Map, PluggableMap);\n\nMap.prototype.createRenderer = function() {\n const renderer = new CanvasMapRenderer(this);\n renderer.registerLayerRenderers([\n CanvasImageLayerRenderer,\n CanvasTileLayerRenderer,\n CanvasVectorLayerRenderer,\n CanvasVectorTileLayerRenderer\n ]);\n return renderer;\n};\n\nexport default Map;\n","/**\n * @module ol/OverlayPositioning\n */\n\n/**\n * Overlay position: `'bottom-left'`, `'bottom-center'`, `'bottom-right'`,\n * `'center-left'`, `'center-center'`, `'center-right'`, `'top-left'`,\n * `'top-center'`, `'top-right'`\n * @enum {string}\n */\nexport default {\n BOTTOM_LEFT: 'bottom-left',\n BOTTOM_CENTER: 'bottom-center',\n BOTTOM_RIGHT: 'bottom-right',\n CENTER_LEFT: 'center-left',\n CENTER_CENTER: 'center-center',\n CENTER_RIGHT: 'center-right',\n TOP_LEFT: 'top-left',\n TOP_CENTER: 'top-center',\n TOP_RIGHT: 'top-right'\n};\n","/**\n * @module ol/Overlay\n */\nimport {inherits} from './util.js';\nimport MapEventType from './MapEventType.js';\nimport BaseObject, {getChangeEventType} from './Object.js';\nimport OverlayPositioning from './OverlayPositioning.js';\nimport {CLASS_SELECTABLE} from './css.js';\nimport {removeNode, removeChildren, outerWidth, outerHeight} from './dom.js';\nimport {listen, unlistenByKey} from './events.js';\nimport {containsExtent} from './extent.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number|string} [id] Set the overlay id. The overlay id can be used\n * with the {@link module:ol/Map~Map#getOverlayById} method.\n * @property {Element} [element] The overlay element.\n * @property {Array.<number>} [offset=[0, 0]] Offsets in pixels used when positioning\n * the overlay. The first element in the\n * array is the horizontal offset. A positive value shifts the overlay right.\n * The second element in the array is the vertical offset. A positive value\n * shifts the overlay down.\n * @property {module:ol/coordinate~Coordinate} [position] The overlay position\n * in map projection.\n * @property {module:ol/OverlayPositioning} [positioning='top-left'] Defines how\n * the overlay is actually positioned with respect to its `position` property.\n * Possible values are `'bottom-left'`, `'bottom-center'`, `'bottom-right'`,\n * `'center-left'`, `'center-center'`, `'center-right'`, `'top-left'`,\n * `'top-center'`, and `'top-right'`.\n * @property {boolean} [stopEvent=true] Whether event propagation to the map\n * viewport should be stopped. If `true` the overlay is placed in the same\n * container as that of the controls (CSS class name\n * `ol-overlaycontainer-stopevent`); if `false` it is placed in the container\n * with CSS class name specified by the `className` property.\n * @property {boolean} [insertFirst=true] Whether the overlay is inserted first\n * in the overlay container, or appended. If the overlay is placed in the same\n * container as that of the controls (see the `stopEvent` option) you will\n * probably set `insertFirst` to `true` so the overlay is displayed below the\n * controls.\n * @property {boolean} [autoPan=false] If set to `true` the map is panned when\n * calling `setPosition`, so that the overlay is entirely visible in the current\n * viewport.\n * @property {module:ol/Overlay~PanOptions} [autoPanAnimation] The\n * animation options used to pan the overlay into view. This animation is only\n * used when `autoPan` is enabled. A `duration` and `easing` may be provided to\n * customize the animation.\n * @property {number} [autoPanMargin=20] The margin (in pixels) between the\n * overlay and the borders of the map when autopanning.\n * @property {string} [className='ol-overlay-container ol-selectable'] CSS class\n * name.\n */\n\n\n/**\n * @typedef {Object} PanOptions\n * @property {number} [duration=1000] The duration of the animation in\n * milliseconds.\n * @property {function(number):number} [easing] The easing function to use. Can\n * be one from {@link module:ol/easing} or a custom function.\n * Default is {@link module:ol/easing~inAndOut}.\n */\n\n\n/**\n * @enum {string}\n * @protected\n */\nconst Property = {\n ELEMENT: 'element',\n MAP: 'map',\n OFFSET: 'offset',\n POSITION: 'position',\n POSITIONING: 'positioning'\n};\n\n\n/**\n * @classdesc\n * An element to be displayed over the map and attached to a single map\n * location. Like {@link module:ol/control/Control~Control}, Overlays are\n * visible widgets. Unlike Controls, they are not in a fixed position on the\n * screen, but are tied to a geographical coordinate, so panning the map will\n * move an Overlay but not a Control.\n *\n * Example:\n *\n * import Overlay from 'ol/Overlay';\n *\n * var popup = new Overlay({\n * element: document.getElementById('popup')\n * });\n * popup.setPosition(coordinate);\n * map.addOverlay(popup);\n *\n * @constructor\n * @extends {module:ol/Object}\n * @param {module:ol/Overlay~Options} options Overlay options.\n * @api\n */\nconst Overlay = function(options) {\n\n BaseObject.call(this);\n\n /**\n * @protected\n * @type {module:ol/Overlay~Options}\n */\n this.options = options;\n\n /**\n * @protected\n * @type {number|string|undefined}\n */\n this.id = options.id;\n\n /**\n * @protected\n * @type {boolean}\n */\n this.insertFirst = options.insertFirst !== undefined ?\n options.insertFirst : true;\n\n /**\n * @protected\n * @type {boolean}\n */\n this.stopEvent = options.stopEvent !== undefined ? options.stopEvent : true;\n\n /**\n * @protected\n * @type {Element}\n */\n this.element = document.createElement('DIV');\n this.element.className = options.className !== undefined ?\n options.className : 'ol-overlay-container ' + CLASS_SELECTABLE;\n this.element.style.position = 'absolute';\n\n /**\n * @protected\n * @type {boolean}\n */\n this.autoPan = options.autoPan !== undefined ? options.autoPan : false;\n\n /**\n * @protected\n * @type {module:ol/Overlay~PanOptions}\n */\n this.autoPanAnimation = options.autoPanAnimation || /** @type {module:ol/Overlay~PanOptions} */ ({});\n\n /**\n * @protected\n * @type {number}\n */\n this.autoPanMargin = options.autoPanMargin !== undefined ?\n options.autoPanMargin : 20;\n\n /**\n * @protected\n * @type {{bottom_: string,\n * left_: string,\n * right_: string,\n * top_: string,\n * visible: boolean}}\n */\n this.rendered = {\n bottom_: '',\n left_: '',\n right_: '',\n top_: '',\n visible: true\n };\n\n /**\n * @protected\n * @type {?module:ol/events~EventsKey}\n */\n this.mapPostrenderListenerKey = null;\n\n listen(\n this, getChangeEventType(Property.ELEMENT),\n this.handleElementChanged, this);\n\n listen(\n this, getChangeEventType(Property.MAP),\n this.handleMapChanged, this);\n\n listen(\n this, getChangeEventType(Property.OFFSET),\n this.handleOffsetChanged, this);\n\n listen(\n this, getChangeEventType(Property.POSITION),\n this.handlePositionChanged, this);\n\n listen(\n this, getChangeEventType(Property.POSITIONING),\n this.handlePositioningChanged, this);\n\n if (options.element !== undefined) {\n this.setElement(options.element);\n }\n\n this.setOffset(options.offset !== undefined ? options.offset : [0, 0]);\n\n this.setPositioning(options.positioning !== undefined ?\n /** @type {module:ol/OverlayPositioning} */ (options.positioning) :\n OverlayPositioning.TOP_LEFT);\n\n if (options.position !== undefined) {\n this.setPosition(options.position);\n }\n\n};\n\ninherits(Overlay, BaseObject);\n\n\n/**\n * Get the DOM element of this overlay.\n * @return {Element|undefined} The Element containing the overlay.\n * @observable\n * @api\n */\nOverlay.prototype.getElement = function() {\n return /** @type {Element|undefined} */ (this.get(Property.ELEMENT));\n};\n\n\n/**\n * Get the overlay identifier which is set on constructor.\n * @return {number|string|undefined} Id.\n * @api\n */\nOverlay.prototype.getId = function() {\n return this.id;\n};\n\n\n/**\n * Get the map associated with this overlay.\n * @return {module:ol/PluggableMap|undefined} The map that the\n * overlay is part of.\n * @observable\n * @api\n */\nOverlay.prototype.getMap = function() {\n return (\n /** @type {module:ol/PluggableMap|undefined} */ (this.get(Property.MAP))\n );\n};\n\n\n/**\n * Get the offset of this overlay.\n * @return {Array.<number>} The offset.\n * @observable\n * @api\n */\nOverlay.prototype.getOffset = function() {\n return /** @type {Array.<number>} */ (this.get(Property.OFFSET));\n};\n\n\n/**\n * Get the current position of this overlay.\n * @return {module:ol/coordinate~Coordinate|undefined} The spatial point that the overlay is\n * anchored at.\n * @observable\n * @api\n */\nOverlay.prototype.getPosition = function() {\n return (\n /** @type {module:ol/coordinate~Coordinate|undefined} */ (this.get(Property.POSITION))\n );\n};\n\n\n/**\n * Get the current positioning of this overlay.\n * @return {module:ol/OverlayPositioning} How the overlay is positioned\n * relative to its point on the map.\n * @observable\n * @api\n */\nOverlay.prototype.getPositioning = function() {\n return (\n /** @type {module:ol/OverlayPositioning} */ (this.get(Property.POSITIONING))\n );\n};\n\n\n/**\n * @protected\n */\nOverlay.prototype.handleElementChanged = function() {\n removeChildren(this.element);\n const element = this.getElement();\n if (element) {\n this.element.appendChild(element);\n }\n};\n\n\n/**\n * @protected\n */\nOverlay.prototype.handleMapChanged = function() {\n if (this.mapPostrenderListenerKey) {\n removeNode(this.element);\n unlistenByKey(this.mapPostrenderListenerKey);\n this.mapPostrenderListenerKey = null;\n }\n const map = this.getMap();\n if (map) {\n this.mapPostrenderListenerKey = listen(map,\n MapEventType.POSTRENDER, this.render, this);\n this.updatePixelPosition();\n const container = this.stopEvent ?\n map.getOverlayContainerStopEvent() : map.getOverlayContainer();\n if (this.insertFirst) {\n container.insertBefore(this.element, container.childNodes[0] || null);\n } else {\n container.appendChild(this.element);\n }\n }\n};\n\n\n/**\n * @protected\n */\nOverlay.prototype.render = function() {\n this.updatePixelPosition();\n};\n\n\n/**\n * @protected\n */\nOverlay.prototype.handleOffsetChanged = function() {\n this.updatePixelPosition();\n};\n\n\n/**\n * @protected\n */\nOverlay.prototype.handlePositionChanged = function() {\n this.updatePixelPosition();\n if (this.get(Property.POSITION) && this.autoPan) {\n this.panIntoView();\n }\n};\n\n\n/**\n * @protected\n */\nOverlay.prototype.handlePositioningChanged = function() {\n this.updatePixelPosition();\n};\n\n\n/**\n * Set the DOM element to be associated with this overlay.\n * @param {Element|undefined} element The Element containing the overlay.\n * @observable\n * @api\n */\nOverlay.prototype.setElement = function(element) {\n this.set(Property.ELEMENT, element);\n};\n\n\n/**\n * Set the map to be associated with this overlay.\n * @param {module:ol/PluggableMap|undefined} map The map that the\n * overlay is part of.\n * @observable\n * @api\n */\nOverlay.prototype.setMap = function(map) {\n this.set(Property.MAP, map);\n};\n\n\n/**\n * Set the offset for this overlay.\n * @param {Array.<number>} offset Offset.\n * @observable\n * @api\n */\nOverlay.prototype.setOffset = function(offset) {\n this.set(Property.OFFSET, offset);\n};\n\n\n/**\n * Set the position for this overlay. If the position is `undefined` the\n * overlay is hidden.\n * @param {module:ol/coordinate~Coordinate|undefined} position The spatial point that the overlay\n * is anchored at.\n * @observable\n * @api\n */\nOverlay.prototype.setPosition = function(position) {\n this.set(Property.POSITION, position);\n};\n\n\n/**\n * Pan the map so that the overlay is entirely visible in the current viewport\n * (if necessary).\n * @protected\n */\nOverlay.prototype.panIntoView = function() {\n const map = this.getMap();\n\n if (!map || !map.getTargetElement()) {\n return;\n }\n\n const mapRect = this.getRect(map.getTargetElement(), map.getSize());\n const element = /** @type {!Element} */ (this.getElement());\n const overlayRect = this.getRect(element, [outerWidth(element), outerHeight(element)]);\n\n const margin = this.autoPanMargin;\n if (!containsExtent(mapRect, overlayRect)) {\n // the overlay is not completely inside the viewport, so pan the map\n const offsetLeft = overlayRect[0] - mapRect[0];\n const offsetRight = mapRect[2] - overlayRect[2];\n const offsetTop = overlayRect[1] - mapRect[1];\n const offsetBottom = mapRect[3] - overlayRect[3];\n\n const delta = [0, 0];\n if (offsetLeft < 0) {\n // move map to the left\n delta[0] = offsetLeft - margin;\n } else if (offsetRight < 0) {\n // move map to the right\n delta[0] = Math.abs(offsetRight) + margin;\n }\n if (offsetTop < 0) {\n // move map up\n delta[1] = offsetTop - margin;\n } else if (offsetBottom < 0) {\n // move map down\n delta[1] = Math.abs(offsetBottom) + margin;\n }\n\n if (delta[0] !== 0 || delta[1] !== 0) {\n const center = /** @type {module:ol/coordinate~Coordinate} */ (map.getView().getCenter());\n const centerPx = map.getPixelFromCoordinate(center);\n const newCenterPx = [\n centerPx[0] + delta[0],\n centerPx[1] + delta[1]\n ];\n\n map.getView().animate({\n center: map.getCoordinateFromPixel(newCenterPx),\n duration: this.autoPanAnimation.duration,\n easing: this.autoPanAnimation.easing\n });\n }\n }\n};\n\n\n/**\n * Get the extent of an element relative to the document\n * @param {Element|undefined} element The element.\n * @param {module:ol/size~Size|undefined} size The size of the element.\n * @return {module:ol/extent~Extent} The extent.\n * @protected\n */\nOverlay.prototype.getRect = function(element, size) {\n const box = element.getBoundingClientRect();\n const offsetX = box.left + window.pageXOffset;\n const offsetY = box.top + window.pageYOffset;\n return [\n offsetX,\n offsetY,\n offsetX + size[0],\n offsetY + size[1]\n ];\n};\n\n\n/**\n * Set the positioning for this overlay.\n * @param {module:ol/OverlayPositioning} positioning how the overlay is\n * positioned relative to its point on the map.\n * @observable\n * @api\n */\nOverlay.prototype.setPositioning = function(positioning) {\n this.set(Property.POSITIONING, positioning);\n};\n\n\n/**\n * Modify the visibility of the element.\n * @param {boolean} visible Element visibility.\n * @protected\n */\nOverlay.prototype.setVisible = function(visible) {\n if (this.rendered.visible !== visible) {\n this.element.style.display = visible ? '' : 'none';\n this.rendered.visible = visible;\n }\n};\n\n\n/**\n * Update pixel position.\n * @protected\n */\nOverlay.prototype.updatePixelPosition = function() {\n const map = this.getMap();\n const position = this.getPosition();\n if (!map || !map.isRendered() || !position) {\n this.setVisible(false);\n return;\n }\n\n const pixel = map.getPixelFromCoordinate(position);\n const mapSize = map.getSize();\n this.updateRenderedPosition(pixel, mapSize);\n};\n\n\n/**\n * @param {module:ol~Pixel} pixel The pixel location.\n * @param {module:ol/size~Size|undefined} mapSize The map size.\n * @protected\n */\nOverlay.prototype.updateRenderedPosition = function(pixel, mapSize) {\n const style = this.element.style;\n const offset = this.getOffset();\n\n const positioning = this.getPositioning();\n\n this.setVisible(true);\n\n let offsetX = offset[0];\n let offsetY = offset[1];\n if (positioning == OverlayPositioning.BOTTOM_RIGHT ||\n positioning == OverlayPositioning.CENTER_RIGHT ||\n positioning == OverlayPositioning.TOP_RIGHT) {\n if (this.rendered.left_ !== '') {\n this.rendered.left_ = style.left = '';\n }\n const right = Math.round(mapSize[0] - pixel[0] - offsetX) + 'px';\n if (this.rendered.right_ != right) {\n this.rendered.right_ = style.right = right;\n }\n } else {\n if (this.rendered.right_ !== '') {\n this.rendered.right_ = style.right = '';\n }\n if (positioning == OverlayPositioning.BOTTOM_CENTER ||\n positioning == OverlayPositioning.CENTER_CENTER ||\n positioning == OverlayPositioning.TOP_CENTER) {\n offsetX -= this.element.offsetWidth / 2;\n }\n const left = Math.round(pixel[0] + offsetX) + 'px';\n if (this.rendered.left_ != left) {\n this.rendered.left_ = style.left = left;\n }\n }\n if (positioning == OverlayPositioning.BOTTOM_LEFT ||\n positioning == OverlayPositioning.BOTTOM_CENTER ||\n positioning == OverlayPositioning.BOTTOM_RIGHT) {\n if (this.rendered.top_ !== '') {\n this.rendered.top_ = style.top = '';\n }\n const bottom = Math.round(mapSize[1] - pixel[1] - offsetY) + 'px';\n if (this.rendered.bottom_ != bottom) {\n this.rendered.bottom_ = style.bottom = bottom;\n }\n } else {\n if (this.rendered.bottom_ !== '') {\n this.rendered.bottom_ = style.bottom = '';\n }\n if (positioning == OverlayPositioning.CENTER_LEFT ||\n positioning == OverlayPositioning.CENTER_CENTER ||\n positioning == OverlayPositioning.CENTER_RIGHT) {\n offsetY -= this.element.offsetHeight / 2;\n }\n const top = Math.round(pixel[1] + offsetY) + 'px';\n if (this.rendered.top_ != top) {\n this.rendered.top_ = style.top = top;\n }\n }\n};\n\n\n/**\n * returns the options this Overlay has been created with\n * @return {module:ol/Overlay~Options} overlay options\n */\nOverlay.prototype.getOptions = function() {\n return this.options;\n};\n\nexport default Overlay;\n","/**\n * @module ol/VectorTile\n */\nimport {getUid, inherits} from './util.js';\nimport Tile from './Tile.js';\nimport TileState from './TileState.js';\n\n/**\n * @typedef {function(new: module:ol/VectorTile, module:ol/tilecoord~TileCoord,\n * module:ol/TileState, string, ?string, module:ol/Tile~LoadFunction)} TileClass\n * @api\n */\n\n/**\n * @constructor\n * @extends {module:ol/Tile}\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {module:ol/TileState} state State.\n * @param {string} src Data source url.\n * @param {module:ol/format/Feature} format Feature format.\n * @param {module:ol/Tile~LoadFunction} tileLoadFunction Tile load function.\n * @param {module:ol/Tile~Options=} opt_options Tile options.\n */\nconst VectorTile = function(tileCoord, state, src, format, tileLoadFunction, opt_options) {\n\n Tile.call(this, tileCoord, state, opt_options);\n\n /**\n * @type {number}\n */\n this.consumers = 0;\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.extent_ = null;\n\n /**\n * @private\n * @type {module:ol/format/Feature}\n */\n this.format_ = format;\n\n /**\n * @private\n * @type {Array.<module:ol/Feature>}\n */\n this.features_ = null;\n\n /**\n * @private\n * @type {module:ol/featureloader~FeatureLoader}\n */\n this.loader_;\n\n /**\n * Data projection\n * @private\n * @type {module:ol/proj/Projection}\n */\n this.projection_ = null;\n\n /**\n * @private\n * @type {Object.<string, module:ol/render/ReplayGroup>}\n */\n this.replayGroups_ = {};\n\n /**\n * @private\n * @type {module:ol/Tile~LoadFunction}\n */\n this.tileLoadFunction_ = tileLoadFunction;\n\n /**\n * @private\n * @type {string}\n */\n this.url_ = src;\n\n};\n\ninherits(VectorTile, Tile);\n\n/**\n * @const\n * @type {module:ol/extent~Extent}\n */\nconst DEFAULT_EXTENT = [0, 0, 4096, 4096];\n\n\n/**\n * @inheritDoc\n */\nVectorTile.prototype.disposeInternal = function() {\n this.features_ = null;\n this.replayGroups_ = {};\n this.state = TileState.ABORT;\n this.changed();\n Tile.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * Gets the extent of the vector tile.\n * @return {module:ol/extent~Extent} The extent.\n * @api\n */\nVectorTile.prototype.getExtent = function() {\n return this.extent_ || DEFAULT_EXTENT;\n};\n\n\n/**\n * Get the feature format assigned for reading this tile's features.\n * @return {module:ol/format/Feature} Feature format.\n * @api\n */\nVectorTile.prototype.getFormat = function() {\n return this.format_;\n};\n\n\n/**\n * Get the features for this tile. Geometries will be in the projection returned\n * by {@link module:ol/VectorTile~VectorTile#getProjection}.\n * @return {Array.<module:ol/Feature|module:ol/render/Feature>} Features.\n * @api\n */\nVectorTile.prototype.getFeatures = function() {\n return this.features_;\n};\n\n\n/**\n * @inheritDoc\n */\nVectorTile.prototype.getKey = function() {\n return this.url_;\n};\n\n\n/**\n * Get the feature projection of features returned by\n * {@link module:ol/VectorTile~VectorTile#getFeatures}.\n * @return {module:ol/proj/Projection} Feature projection.\n * @api\n */\nVectorTile.prototype.getProjection = function() {\n return this.projection_;\n};\n\n\n/**\n * @param {module:ol/layer/Layer} layer Layer.\n * @param {string} key Key.\n * @return {module:ol/render/ReplayGroup} Replay group.\n */\nVectorTile.prototype.getReplayGroup = function(layer, key) {\n return this.replayGroups_[getUid(layer) + ',' + key];\n};\n\n\n/**\n * @inheritDoc\n */\nVectorTile.prototype.load = function() {\n if (this.state == TileState.IDLE) {\n this.setState(TileState.LOADING);\n this.tileLoadFunction_(this, this.url_);\n this.loader_(null, NaN, null);\n }\n};\n\n\n/**\n * Handler for successful tile load.\n * @param {Array.<module:ol/Feature>} features The loaded features.\n * @param {module:ol/proj/Projection} dataProjection Data projection.\n * @param {module:ol/extent~Extent} extent Extent.\n */\nVectorTile.prototype.onLoad = function(features, dataProjection, extent) {\n this.setProjection(dataProjection);\n this.setFeatures(features);\n this.setExtent(extent);\n};\n\n\n/**\n * Handler for tile load errors.\n */\nVectorTile.prototype.onError = function() {\n this.setState(TileState.ERROR);\n};\n\n\n/**\n * Function for use in an {@link module:ol/source/VectorTile~VectorTile}'s\n * `tileLoadFunction`. Sets the extent of the vector tile. This is only required\n * for tiles in projections with `tile-pixels` as units. The extent should be\n * set to `[0, 0, tilePixelSize, tilePixelSize]`, where `tilePixelSize` is\n * calculated by multiplying the tile size with the tile pixel ratio. For\n * sources using {@link module:ol/format/MVT~MVT} as feature format, the\n * {@link module:ol/format/MVT~MVT#getLastExtent} method will return the correct\n * extent. The default is `[0, 0, 4096, 4096]`.\n * @param {module:ol/extent~Extent} extent The extent.\n * @api\n */\nVectorTile.prototype.setExtent = function(extent) {\n this.extent_ = extent;\n};\n\n\n/**\n * Function for use in an {@link module:ol/source/VectorTile~VectorTile}'s `tileLoadFunction`.\n * Sets the features for the tile.\n * @param {Array.<module:ol/Feature>} features Features.\n * @api\n */\nVectorTile.prototype.setFeatures = function(features) {\n this.features_ = features;\n this.setState(TileState.LOADED);\n};\n\n\n/**\n * Function for use in an {@link module:ol/source/VectorTile~VectorTile}'s `tileLoadFunction`.\n * Sets the projection of the features that were added with\n * {@link module:ol/VectorTile~VectorTile#setFeatures}.\n * @param {module:ol/proj/Projection} projection Feature projection.\n * @api\n */\nVectorTile.prototype.setProjection = function(projection) {\n this.projection_ = projection;\n};\n\n\n/**\n * @param {module:ol/layer/Layer} layer Layer.\n * @param {string} key Key.\n * @param {module:ol/render/ReplayGroup} replayGroup Replay group.\n */\nVectorTile.prototype.setReplayGroup = function(layer, key, replayGroup) {\n this.replayGroups_[getUid(layer) + ',' + key] = replayGroup;\n};\n\n\n/**\n * Set the feature loader for reading this tile's features.\n * @param {module:ol/featureloader~FeatureLoader} loader Feature loader.\n * @api\n */\nVectorTile.prototype.setLoader = function(loader) {\n this.loader_ = loader;\n};\n\nexport default VectorTile;\n","/**\n * @module ol/control/FullScreen\n */\nimport {inherits} from '../util.js';\nimport Control from '../control/Control.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE, CLASS_UNSUPPORTED} from '../css.js';\nimport {replaceNode} from '../dom.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\n\n\n/**\n * @return {string} Change type.\n */\nconst getChangeType = (function() {\n let changeType;\n return function() {\n if (!changeType) {\n const body = document.body;\n if (body.webkitRequestFullscreen) {\n changeType = 'webkitfullscreenchange';\n } else if (body.mozRequestFullScreen) {\n changeType = 'mozfullscreenchange';\n } else if (body.msRequestFullscreen) {\n changeType = 'MSFullscreenChange';\n } else if (body.requestFullscreen) {\n changeType = 'fullscreenchange';\n }\n }\n return changeType;\n };\n})();\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-full-screen'] CSS class name.\n * @property {string|Element} [label='\\u2922'] Text label to use for the button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string|Element} [labelActive='\\u00d7'] Text label to use for the\n * button when full-screen is active.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [tipLabel='Toggle full-screen'] Text label to use for the button tip.\n * @property {boolean} [keys=false] Full keyboard access.\n * @property {Element|string} [target] Specify a target if you want the\n * control to be rendered outside of the map's viewport.\n * @property {Element|string} [source] The element to be displayed\n * fullscreen. When not provided, the element containing the map viewport will\n * be displayed fullscreen.\n */\n\n\n/**\n * @classdesc\n * Provides a button that when clicked fills up the full screen with the map.\n * The full screen source element is by default the element containing the map viewport unless\n * overridden by providing the `source` option. In which case, the dom\n * element introduced using this parameter will be displayed in full screen.\n *\n * When in full screen mode, a close button is shown to exit full screen mode.\n * The [Fullscreen API](http://www.w3.org/TR/fullscreen/) is used to\n * toggle the map in full screen mode.\n *\n *\n * @constructor\n * @extends {module:ol/control/Control}\n * @param {module:ol/control/FullScreen~Options=} opt_options Options.\n * @api\n */\nconst FullScreen = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n /**\n * @private\n * @type {string}\n */\n this.cssClassName_ = options.className !== undefined ? options.className :\n 'ol-full-screen';\n\n const label = options.label !== undefined ? options.label : '\\u2922';\n\n /**\n * @private\n * @type {Element}\n */\n this.labelNode_ = typeof label === 'string' ?\n document.createTextNode(label) : label;\n\n const labelActive = options.labelActive !== undefined ? options.labelActive : '\\u00d7';\n\n /**\n * @private\n * @type {Element}\n */\n this.labelActiveNode_ = typeof labelActive === 'string' ?\n document.createTextNode(labelActive) : labelActive;\n\n const tipLabel = options.tipLabel ? options.tipLabel : 'Toggle full-screen';\n const button = document.createElement('button');\n button.className = this.cssClassName_ + '-' + isFullScreen();\n button.setAttribute('type', 'button');\n button.title = tipLabel;\n button.appendChild(this.labelNode_);\n\n listen(button, EventType.CLICK,\n this.handleClick_, this);\n\n const cssClasses = this.cssClassName_ + ' ' + CLASS_UNSELECTABLE +\n ' ' + CLASS_CONTROL + ' ' +\n (!isFullScreenSupported() ? CLASS_UNSUPPORTED : '');\n const element = document.createElement('div');\n element.className = cssClasses;\n element.appendChild(button);\n\n Control.call(this, {\n element: element,\n target: options.target\n });\n\n /**\n * @private\n * @type {boolean}\n */\n this.keys_ = options.keys !== undefined ? options.keys : false;\n\n /**\n * @private\n * @type {Element|string|undefined}\n */\n this.source_ = options.source;\n\n};\n\ninherits(FullScreen, Control);\n\n\n/**\n * @param {Event} event The event to handle\n * @private\n */\nFullScreen.prototype.handleClick_ = function(event) {\n event.preventDefault();\n this.handleFullScreen_();\n};\n\n\n/**\n * @private\n */\nFullScreen.prototype.handleFullScreen_ = function() {\n if (!isFullScreenSupported()) {\n return;\n }\n const map = this.getMap();\n if (!map) {\n return;\n }\n if (isFullScreen()) {\n exitFullScreen();\n } else {\n let element;\n if (this.source_) {\n element = typeof this.source_ === 'string' ?\n document.getElementById(this.source_) :\n this.source_;\n } else {\n element = map.getTargetElement();\n }\n if (this.keys_) {\n requestFullScreenWithKeys(element);\n\n } else {\n requestFullScreen(element);\n }\n }\n};\n\n\n/**\n * @private\n */\nFullScreen.prototype.handleFullScreenChange_ = function() {\n const button = this.element.firstElementChild;\n const map = this.getMap();\n if (isFullScreen()) {\n button.className = this.cssClassName_ + '-true';\n replaceNode(this.labelActiveNode_, this.labelNode_);\n } else {\n button.className = this.cssClassName_ + '-false';\n replaceNode(this.labelNode_, this.labelActiveNode_);\n }\n if (map) {\n map.updateSize();\n }\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nFullScreen.prototype.setMap = function(map) {\n Control.prototype.setMap.call(this, map);\n if (map) {\n this.listenerKeys.push(listen(document,\n getChangeType(),\n this.handleFullScreenChange_, this)\n );\n }\n};\n\n/**\n * @return {boolean} Fullscreen is supported by the current platform.\n */\nfunction isFullScreenSupported() {\n const body = document.body;\n return !!(\n body.webkitRequestFullscreen ||\n (body.mozRequestFullScreen && document.mozFullScreenEnabled) ||\n (body.msRequestFullscreen && document.msFullscreenEnabled) ||\n (body.requestFullscreen && document.fullscreenEnabled)\n );\n}\n\n/**\n * @return {boolean} Element is currently in fullscreen.\n */\nfunction isFullScreen() {\n return !!(\n document.webkitIsFullScreen || document.mozFullScreen ||\n document.msFullscreenElement || document.fullscreenElement\n );\n}\n\n/**\n * Request to fullscreen an element.\n * @param {Element} element Element to request fullscreen\n */\nfunction requestFullScreen(element) {\n if (element.requestFullscreen) {\n element.requestFullscreen();\n } else if (element.msRequestFullscreen) {\n element.msRequestFullscreen();\n } else if (element.mozRequestFullScreen) {\n element.mozRequestFullScreen();\n } else if (element.webkitRequestFullscreen) {\n element.webkitRequestFullscreen();\n }\n}\n\n/**\n * Request to fullscreen an element with keyboard input.\n * @param {Element} element Element to request fullscreen\n */\nfunction requestFullScreenWithKeys(element) {\n if (element.mozRequestFullScreenWithKeys) {\n element.mozRequestFullScreenWithKeys();\n } else if (element.webkitRequestFullscreen) {\n element.webkitRequestFullscreen(Element.ALLOW_KEYBOARD_INPUT);\n } else {\n requestFullScreen(element);\n }\n}\n\n/**\n * Exit fullscreen.\n */\nfunction exitFullScreen() {\n if (document.exitFullscreen) {\n document.exitFullscreen();\n } else if (document.msExitFullscreen) {\n document.msExitFullscreen();\n } else if (document.mozCancelFullScreen) {\n document.mozCancelFullScreen();\n } else if (document.webkitExitFullscreen) {\n document.webkitExitFullscreen();\n }\n}\n\nexport default FullScreen;\n","/**\n * @module ol/control/OverviewMap\n */\nimport {inherits} from '../util.js';\nimport Collection from '../Collection.js';\nimport Map from '../Map.js';\nimport MapEventType from '../MapEventType.js';\nimport MapProperty from '../MapProperty.js';\nimport {getChangeEventType} from '../Object.js';\nimport ObjectEventType from '../ObjectEventType.js';\nimport Overlay from '../Overlay.js';\nimport OverlayPositioning from '../OverlayPositioning.js';\nimport ViewProperty from '../ViewProperty.js';\nimport Control from '../control/Control.js';\nimport {rotate as rotateCoordinate, add as addCoordinate} from '../coordinate.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE, CLASS_COLLAPSED} from '../css.js';\nimport {replaceNode} from '../dom.js';\nimport {listen, listenOnce, unlisten} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {containsExtent, getBottomLeft, getBottomRight, getTopLeft, getTopRight, scaleFromCenter} from '../extent.js';\n\n\n/**\n * Maximum width and/or height extent ratio that determines when the overview\n * map should be zoomed out.\n * @type {number}\n */\nconst MAX_RATIO = 0.75;\n\n\n/**\n * Minimum width and/or height extent ratio that determines when the overview\n * map should be zoomed in.\n * @type {number}\n */\nconst MIN_RATIO = 0.1;\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-overviewmap'] CSS class name.\n * @property {boolean} [collapsed=true] Whether the control should start collapsed or not (expanded).\n * @property {string|Element} [collapseLabel='«'] Text label to use for the\n * expanded overviewmap button. Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {boolean} [collapsible=true] Whether the control can be collapsed or not.\n * @property {string|Element} [label='»'] Text label to use for the collapsed\n * overviewmap button. Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {Array.<module:ol/layer/Layer>|module:ol/Collection.<module:ol/layer/Layer>} [layers]\n * Layers for the overview map. If not set, then all main map layers are used\n * instead.\n * @property {function(module:ol/MapEvent)} [render] Function called when the control\n * should be re-rendered. This is called in a `requestAnimationFrame` callback.\n * @property {Element|string} [target] Specify a target if you want the control\n * to be rendered outside of the map's viewport.\n * @property {string} [tipLabel='Overview map'] Text label to use for the button tip.\n * @property {module:ol/View} [view] Custom view for the overview map. If not provided,\n * a default view with an EPSG:3857 projection will be used.\n */\n\n\n/**\n * Create a new control with a map acting as an overview map for an other\n * defined map.\n * @constructor\n * @extends {module:ol/control/Control}\n * @param {module:ol/control/OverviewMap~Options=} opt_options OverviewMap options.\n * @api\n */\nconst OverviewMap = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n /**\n * @type {boolean}\n * @private\n */\n this.collapsed_ = options.collapsed !== undefined ? options.collapsed : true;\n\n /**\n * @private\n * @type {boolean}\n */\n this.collapsible_ = options.collapsible !== undefined ?\n options.collapsible : true;\n\n if (!this.collapsible_) {\n this.collapsed_ = false;\n }\n\n const className = options.className !== undefined ? options.className : 'ol-overviewmap';\n\n const tipLabel = options.tipLabel !== undefined ? options.tipLabel : 'Overview map';\n\n const collapseLabel = options.collapseLabel !== undefined ? options.collapseLabel : '\\u00AB';\n\n if (typeof collapseLabel === 'string') {\n /**\n * @private\n * @type {Element}\n */\n this.collapseLabel_ = document.createElement('span');\n this.collapseLabel_.textContent = collapseLabel;\n } else {\n this.collapseLabel_ = collapseLabel;\n }\n\n const label = options.label !== undefined ? options.label : '\\u00BB';\n\n\n if (typeof label === 'string') {\n /**\n * @private\n * @type {Element}\n */\n this.label_ = document.createElement('span');\n this.label_.textContent = label;\n } else {\n this.label_ = label;\n }\n\n const activeLabel = (this.collapsible_ && !this.collapsed_) ?\n this.collapseLabel_ : this.label_;\n const button = document.createElement('button');\n button.setAttribute('type', 'button');\n button.title = tipLabel;\n button.appendChild(activeLabel);\n\n listen(button, EventType.CLICK,\n this.handleClick_, this);\n\n /**\n * @type {Element}\n * @private\n */\n this.ovmapDiv_ = document.createElement('DIV');\n this.ovmapDiv_.className = 'ol-overviewmap-map';\n\n /**\n * @type {module:ol/Map}\n * @private\n */\n this.ovmap_ = new Map({\n controls: new Collection(),\n interactions: new Collection(),\n view: options.view\n });\n const ovmap = this.ovmap_;\n\n if (options.layers) {\n options.layers.forEach(\n /**\n * @param {module:ol/layer/Layer} layer Layer.\n */\n (function(layer) {\n ovmap.addLayer(layer);\n }).bind(this));\n }\n\n const box = document.createElement('DIV');\n box.className = 'ol-overviewmap-box';\n box.style.boxSizing = 'border-box';\n\n /**\n * @type {module:ol/Overlay}\n * @private\n */\n this.boxOverlay_ = new Overlay({\n position: [0, 0],\n positioning: OverlayPositioning.BOTTOM_LEFT,\n element: box\n });\n this.ovmap_.addOverlay(this.boxOverlay_);\n\n const cssClasses = className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL +\n (this.collapsed_ && this.collapsible_ ? ' ' + CLASS_COLLAPSED : '') +\n (this.collapsible_ ? '' : ' ol-uncollapsible');\n const element = document.createElement('div');\n element.className = cssClasses;\n element.appendChild(this.ovmapDiv_);\n element.appendChild(button);\n\n Control.call(this, {\n element: element,\n render: options.render || render,\n target: options.target\n });\n\n /* Interactive map */\n\n const scope = this;\n\n const overlay = this.boxOverlay_;\n const overlayBox = this.boxOverlay_.getElement();\n\n /* Functions definition */\n\n const computeDesiredMousePosition = function(mousePosition) {\n return {\n clientX: mousePosition.clientX - (overlayBox.offsetWidth / 2),\n clientY: mousePosition.clientY + (overlayBox.offsetHeight / 2)\n };\n };\n\n const move = function(event) {\n const coordinates = ovmap.getEventCoordinate(computeDesiredMousePosition(event));\n\n overlay.setPosition(coordinates);\n };\n\n const endMoving = function(event) {\n const coordinates = ovmap.getEventCoordinate(event);\n\n scope.getMap().getView().setCenter(coordinates);\n\n window.removeEventListener('mousemove', move);\n window.removeEventListener('mouseup', endMoving);\n };\n\n /* Binding */\n\n overlayBox.addEventListener('mousedown', function() {\n window.addEventListener('mousemove', move);\n window.addEventListener('mouseup', endMoving);\n });\n};\n\ninherits(OverviewMap, Control);\n\n\n/**\n * @inheritDoc\n * @api\n */\nOverviewMap.prototype.setMap = function(map) {\n const oldMap = this.getMap();\n if (map === oldMap) {\n return;\n }\n if (oldMap) {\n const oldView = oldMap.getView();\n if (oldView) {\n this.unbindView_(oldView);\n }\n this.ovmap_.setTarget(null);\n }\n Control.prototype.setMap.call(this, map);\n\n if (map) {\n this.ovmap_.setTarget(this.ovmapDiv_);\n this.listenerKeys.push(listen(\n map, ObjectEventType.PROPERTYCHANGE,\n this.handleMapPropertyChange_, this));\n\n // TODO: to really support map switching, this would need to be reworked\n if (this.ovmap_.getLayers().getLength() === 0) {\n this.ovmap_.setLayerGroup(map.getLayerGroup());\n }\n\n const view = map.getView();\n if (view) {\n this.bindView_(view);\n if (view.isDef()) {\n this.ovmap_.updateSize();\n this.resetExtent_();\n }\n }\n }\n};\n\n\n/**\n * Handle map property changes. This only deals with changes to the map's view.\n * @param {module:ol/Object~ObjectEvent} event The propertychange event.\n * @private\n */\nOverviewMap.prototype.handleMapPropertyChange_ = function(event) {\n if (event.key === MapProperty.VIEW) {\n const oldView = /** @type {module:ol/View} */ (event.oldValue);\n if (oldView) {\n this.unbindView_(oldView);\n }\n const newView = this.getMap().getView();\n this.bindView_(newView);\n }\n};\n\n\n/**\n * Register listeners for view property changes.\n * @param {module:ol/View} view The view.\n * @private\n */\nOverviewMap.prototype.bindView_ = function(view) {\n listen(view,\n getChangeEventType(ViewProperty.ROTATION),\n this.handleRotationChanged_, this);\n};\n\n\n/**\n * Unregister listeners for view property changes.\n * @param {module:ol/View} view The view.\n * @private\n */\nOverviewMap.prototype.unbindView_ = function(view) {\n unlisten(view,\n getChangeEventType(ViewProperty.ROTATION),\n this.handleRotationChanged_, this);\n};\n\n\n/**\n * Handle rotation changes to the main map.\n * TODO: This should rotate the extent rectrangle instead of the\n * overview map's view.\n * @private\n */\nOverviewMap.prototype.handleRotationChanged_ = function() {\n this.ovmap_.getView().setRotation(this.getMap().getView().getRotation());\n};\n\n\n/**\n * Update the overview map element.\n * @param {module:ol/MapEvent} mapEvent Map event.\n * @this {module:ol/control/OverviewMap}\n * @api\n */\nexport function render(mapEvent) {\n this.validateExtent_();\n this.updateBox_();\n}\n\n\n/**\n * Reset the overview map extent if the box size (width or\n * height) is less than the size of the overview map size times minRatio\n * or is greater than the size of the overview size times maxRatio.\n *\n * If the map extent was not reset, the box size can fits in the defined\n * ratio sizes. This method then checks if is contained inside the overview\n * map current extent. If not, recenter the overview map to the current\n * main map center location.\n * @private\n */\nOverviewMap.prototype.validateExtent_ = function() {\n const map = this.getMap();\n const ovmap = this.ovmap_;\n\n if (!map.isRendered() || !ovmap.isRendered()) {\n return;\n }\n\n const mapSize = /** @type {module:ol/size~Size} */ (map.getSize());\n\n const view = map.getView();\n const extent = view.calculateExtent(mapSize);\n\n const ovmapSize = /** @type {module:ol/size~Size} */ (ovmap.getSize());\n\n const ovview = ovmap.getView();\n const ovextent = ovview.calculateExtent(ovmapSize);\n\n const topLeftPixel =\n ovmap.getPixelFromCoordinate(getTopLeft(extent));\n const bottomRightPixel =\n ovmap.getPixelFromCoordinate(getBottomRight(extent));\n\n const boxWidth = Math.abs(topLeftPixel[0] - bottomRightPixel[0]);\n const boxHeight = Math.abs(topLeftPixel[1] - bottomRightPixel[1]);\n\n const ovmapWidth = ovmapSize[0];\n const ovmapHeight = ovmapSize[1];\n\n if (boxWidth < ovmapWidth * MIN_RATIO ||\n boxHeight < ovmapHeight * MIN_RATIO ||\n boxWidth > ovmapWidth * MAX_RATIO ||\n boxHeight > ovmapHeight * MAX_RATIO) {\n this.resetExtent_();\n } else if (!containsExtent(ovextent, extent)) {\n this.recenter_();\n }\n};\n\n\n/**\n * Reset the overview map extent to half calculated min and max ratio times\n * the extent of the main map.\n * @private\n */\nOverviewMap.prototype.resetExtent_ = function() {\n if (MAX_RATIO === 0 || MIN_RATIO === 0) {\n return;\n }\n\n const map = this.getMap();\n const ovmap = this.ovmap_;\n\n const mapSize = /** @type {module:ol/size~Size} */ (map.getSize());\n\n const view = map.getView();\n const extent = view.calculateExtent(mapSize);\n\n const ovview = ovmap.getView();\n\n // get how many times the current map overview could hold different\n // box sizes using the min and max ratio, pick the step in the middle used\n // to calculate the extent from the main map to set it to the overview map,\n const steps = Math.log(\n MAX_RATIO / MIN_RATIO) / Math.LN2;\n const ratio = 1 / (Math.pow(2, steps / 2) * MIN_RATIO);\n scaleFromCenter(extent, ratio);\n ovview.fit(extent);\n};\n\n\n/**\n * Set the center of the overview map to the map center without changing its\n * resolution.\n * @private\n */\nOverviewMap.prototype.recenter_ = function() {\n const map = this.getMap();\n const ovmap = this.ovmap_;\n\n const view = map.getView();\n\n const ovview = ovmap.getView();\n\n ovview.setCenter(view.getCenter());\n};\n\n\n/**\n * Update the box using the main map extent\n * @private\n */\nOverviewMap.prototype.updateBox_ = function() {\n const map = this.getMap();\n const ovmap = this.ovmap_;\n\n if (!map.isRendered() || !ovmap.isRendered()) {\n return;\n }\n\n const mapSize = /** @type {module:ol/size~Size} */ (map.getSize());\n\n const view = map.getView();\n\n const ovview = ovmap.getView();\n\n const rotation = view.getRotation();\n\n const overlay = this.boxOverlay_;\n const box = this.boxOverlay_.getElement();\n const extent = view.calculateExtent(mapSize);\n const ovresolution = ovview.getResolution();\n const bottomLeft = getBottomLeft(extent);\n const topRight = getTopRight(extent);\n\n // set position using bottom left coordinates\n const rotateBottomLeft = this.calculateCoordinateRotate_(rotation, bottomLeft);\n overlay.setPosition(rotateBottomLeft);\n\n // set box size calculated from map extent size and overview map resolution\n if (box) {\n box.style.width = Math.abs((bottomLeft[0] - topRight[0]) / ovresolution) + 'px';\n box.style.height = Math.abs((topRight[1] - bottomLeft[1]) / ovresolution) + 'px';\n }\n};\n\n\n/**\n * @param {number} rotation Target rotation.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @return {module:ol/coordinate~Coordinate|undefined} Coordinate for rotation and center anchor.\n * @private\n */\nOverviewMap.prototype.calculateCoordinateRotate_ = function(\n rotation, coordinate) {\n let coordinateRotate;\n\n const map = this.getMap();\n const view = map.getView();\n\n const currentCenter = view.getCenter();\n\n if (currentCenter) {\n coordinateRotate = [\n coordinate[0] - currentCenter[0],\n coordinate[1] - currentCenter[1]\n ];\n rotateCoordinate(coordinateRotate, rotation);\n addCoordinate(coordinateRotate, currentCenter);\n }\n return coordinateRotate;\n};\n\n\n/**\n * @param {Event} event The event to handle\n * @private\n */\nOverviewMap.prototype.handleClick_ = function(event) {\n event.preventDefault();\n this.handleToggle_();\n};\n\n\n/**\n * @private\n */\nOverviewMap.prototype.handleToggle_ = function() {\n this.element.classList.toggle(CLASS_COLLAPSED);\n if (this.collapsed_) {\n replaceNode(this.collapseLabel_, this.label_);\n } else {\n replaceNode(this.label_, this.collapseLabel_);\n }\n this.collapsed_ = !this.collapsed_;\n\n // manage overview map if it had not been rendered before and control\n // is expanded\n const ovmap = this.ovmap_;\n if (!this.collapsed_ && !ovmap.isRendered()) {\n ovmap.updateSize();\n this.resetExtent_();\n listenOnce(ovmap, MapEventType.POSTRENDER,\n function(event) {\n this.updateBox_();\n },\n this);\n }\n};\n\n\n/**\n * Return `true` if the overview map is collapsible, `false` otherwise.\n * @return {boolean} True if the widget is collapsible.\n * @api\n */\nOverviewMap.prototype.getCollapsible = function() {\n return this.collapsible_;\n};\n\n\n/**\n * Set whether the overview map should be collapsible.\n * @param {boolean} collapsible True if the widget is collapsible.\n * @api\n */\nOverviewMap.prototype.setCollapsible = function(collapsible) {\n if (this.collapsible_ === collapsible) {\n return;\n }\n this.collapsible_ = collapsible;\n this.element.classList.toggle('ol-uncollapsible');\n if (!collapsible && this.collapsed_) {\n this.handleToggle_();\n }\n};\n\n\n/**\n * Collapse or expand the overview map according to the passed parameter. Will\n * not do anything if the overview map isn't collapsible or if the current\n * collapsed state is already the one requested.\n * @param {boolean} collapsed True if the widget is collapsed.\n * @api\n */\nOverviewMap.prototype.setCollapsed = function(collapsed) {\n if (!this.collapsible_ || this.collapsed_ === collapsed) {\n return;\n }\n this.handleToggle_();\n};\n\n\n/**\n * Determine if the overview map is collapsed.\n * @return {boolean} The overview map is collapsed.\n * @api\n */\nOverviewMap.prototype.getCollapsed = function() {\n return this.collapsed_;\n};\n\n\n/**\n * Return the overview map.\n * @return {module:ol/PluggableMap} Overview map.\n * @api\n */\nOverviewMap.prototype.getOverviewMap = function() {\n return this.ovmap_;\n};\nexport default OverviewMap;\n","/**\n * @module ol/control/ScaleLine\n */\nimport {inherits} from '../util.js';\nimport {getChangeEventType} from '../Object.js';\nimport {assert} from '../asserts.js';\nimport Control from '../control/Control.js';\nimport {CLASS_UNSELECTABLE} from '../css.js';\nimport {listen} from '../events.js';\nimport {getPointResolution, METERS_PER_UNIT} from '../proj.js';\nimport ProjUnits from '../proj/Units.js';\n\n\n/**\n * @type {string}\n */\nconst UNITS_PROP = 'units';\n\n/**\n * Units for the scale line. Supported values are `'degrees'`, `'imperial'`,\n * `'nautical'`, `'metric'`, `'us'`.\n * @enum {string}\n */\nexport const Units = {\n DEGREES: 'degrees',\n IMPERIAL: 'imperial',\n NAUTICAL: 'nautical',\n METRIC: 'metric',\n US: 'us'\n};\n\n\n/**\n * @const\n * @type {Array.<number>}\n */\nconst LEADING_DIGITS = [1, 2, 5];\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-scale-line'] CSS Class name.\n * @property {number} [minWidth=64] Minimum width in pixels.\n * @property {function(module:ol/MapEvent)} [render] Function called when the control\n * should be re-rendered. This is called in a `requestAnimationFrame` callback.\n * @property {Element|string} [target] Specify a target if you want the control\n * to be rendered outside of the map's viewport.\n * @property {module:ol/control/ScaleLine~Units|string} [units='metric'] Units.\n */\n\n\n/**\n * @classdesc\n * A control displaying rough y-axis distances, calculated for the center of the\n * viewport. For conformal projections (e.g. EPSG:3857, the default view\n * projection in OpenLayers), the scale is valid for all directions.\n * No scale line will be shown when the y-axis distance of a pixel at the\n * viewport center cannot be calculated in the view projection.\n * By default the scale line will show in the bottom left portion of the map,\n * but this can be changed by using the css selector `.ol-scale-line`.\n *\n * @constructor\n * @extends {module:ol/control/Control}\n * @param {module:ol/control/ScaleLine~Options=} opt_options Scale line options.\n * @api\n */\nconst ScaleLine = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n const className = options.className !== undefined ? options.className : 'ol-scale-line';\n\n /**\n * @private\n * @type {Element}\n */\n this.innerElement_ = document.createElement('DIV');\n this.innerElement_.className = className + '-inner';\n\n /**\n * @private\n * @type {Element}\n */\n this.element_ = document.createElement('DIV');\n this.element_.className = className + ' ' + CLASS_UNSELECTABLE;\n this.element_.appendChild(this.innerElement_);\n\n /**\n * @private\n * @type {?module:ol/View~State}\n */\n this.viewState_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.minWidth_ = options.minWidth !== undefined ? options.minWidth : 64;\n\n /**\n * @private\n * @type {boolean}\n */\n this.renderedVisible_ = false;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.renderedWidth_ = undefined;\n\n /**\n * @private\n * @type {string}\n */\n this.renderedHTML_ = '';\n\n Control.call(this, {\n element: this.element_,\n render: options.render || render,\n target: options.target\n });\n\n listen(\n this, getChangeEventType(UNITS_PROP),\n this.handleUnitsChanged_, this);\n\n this.setUnits(/** @type {module:ol/control/ScaleLine~Units} */ (options.units) ||\n Units.METRIC);\n\n};\n\ninherits(ScaleLine, Control);\n\n\n/**\n * Return the units to use in the scale line.\n * @return {module:ol/control/ScaleLine~Units|undefined} The units\n * to use in the scale line.\n * @observable\n * @api\n */\nScaleLine.prototype.getUnits = function() {\n return (\n /** @type {module:ol/control/ScaleLine~Units|undefined} */ (this.get(UNITS_PROP))\n );\n};\n\n\n/**\n * Update the scale line element.\n * @param {module:ol/MapEvent} mapEvent Map event.\n * @this {module:ol/control/ScaleLine}\n * @api\n */\nexport function render(mapEvent) {\n const frameState = mapEvent.frameState;\n if (!frameState) {\n this.viewState_ = null;\n } else {\n this.viewState_ = frameState.viewState;\n }\n this.updateElement_();\n}\n\n\n/**\n * @private\n */\nScaleLine.prototype.handleUnitsChanged_ = function() {\n this.updateElement_();\n};\n\n\n/**\n * Set the units to use in the scale line.\n * @param {module:ol/control/ScaleLine~Units} units The units to use in the scale line.\n * @observable\n * @api\n */\nScaleLine.prototype.setUnits = function(units) {\n this.set(UNITS_PROP, units);\n};\n\n\n/**\n * @private\n */\nScaleLine.prototype.updateElement_ = function() {\n const viewState = this.viewState_;\n\n if (!viewState) {\n if (this.renderedVisible_) {\n this.element_.style.display = 'none';\n this.renderedVisible_ = false;\n }\n return;\n }\n\n const center = viewState.center;\n const projection = viewState.projection;\n const units = this.getUnits();\n const pointResolutionUnits = units == Units.DEGREES ?\n ProjUnits.DEGREES :\n ProjUnits.METERS;\n let pointResolution =\n getPointResolution(projection, viewState.resolution, center, pointResolutionUnits);\n if (projection.getUnits() != ProjUnits.DEGREES && projection.getMetersPerUnit()\n && pointResolutionUnits == ProjUnits.METERS) {\n pointResolution *= projection.getMetersPerUnit();\n }\n\n let nominalCount = this.minWidth_ * pointResolution;\n let suffix = '';\n if (units == Units.DEGREES) {\n const metersPerDegree = METERS_PER_UNIT[ProjUnits.DEGREES];\n if (projection.getUnits() == ProjUnits.DEGREES) {\n nominalCount *= metersPerDegree;\n } else {\n pointResolution /= metersPerDegree;\n }\n if (nominalCount < metersPerDegree / 60) {\n suffix = '\\u2033'; // seconds\n pointResolution *= 3600;\n } else if (nominalCount < metersPerDegree) {\n suffix = '\\u2032'; // minutes\n pointResolution *= 60;\n } else {\n suffix = '\\u00b0'; // degrees\n }\n } else if (units == Units.IMPERIAL) {\n if (nominalCount < 0.9144) {\n suffix = 'in';\n pointResolution /= 0.0254;\n } else if (nominalCount < 1609.344) {\n suffix = 'ft';\n pointResolution /= 0.3048;\n } else {\n suffix = 'mi';\n pointResolution /= 1609.344;\n }\n } else if (units == Units.NAUTICAL) {\n pointResolution /= 1852;\n suffix = 'nm';\n } else if (units == Units.METRIC) {\n if (nominalCount < 0.001) {\n suffix = 'μm';\n pointResolution *= 1000000;\n } else if (nominalCount < 1) {\n suffix = 'mm';\n pointResolution *= 1000;\n } else if (nominalCount < 1000) {\n suffix = 'm';\n } else {\n suffix = 'km';\n pointResolution /= 1000;\n }\n } else if (units == Units.US) {\n if (nominalCount < 0.9144) {\n suffix = 'in';\n pointResolution *= 39.37;\n } else if (nominalCount < 1609.344) {\n suffix = 'ft';\n pointResolution /= 0.30480061;\n } else {\n suffix = 'mi';\n pointResolution /= 1609.3472;\n }\n } else {\n assert(false, 33); // Invalid units\n }\n\n let i = 3 * Math.floor(\n Math.log(this.minWidth_ * pointResolution) / Math.log(10));\n let count, width;\n while (true) {\n count = LEADING_DIGITS[((i % 3) + 3) % 3] *\n Math.pow(10, Math.floor(i / 3));\n width = Math.round(count / pointResolution);\n if (isNaN(width)) {\n this.element_.style.display = 'none';\n this.renderedVisible_ = false;\n return;\n } else if (width >= this.minWidth_) {\n break;\n }\n ++i;\n }\n\n const html = count + ' ' + suffix;\n if (this.renderedHTML_ != html) {\n this.innerElement_.innerHTML = html;\n this.renderedHTML_ = html;\n }\n\n if (this.renderedWidth_ != width) {\n this.innerElement_.style.width = width + 'px';\n this.renderedWidth_ = width;\n }\n\n if (!this.renderedVisible_) {\n this.element_.style.display = '';\n this.renderedVisible_ = true;\n }\n\n};\n\nexport default ScaleLine;\n","/**\n * @module ol/control/ZoomSlider\n */\nimport {inherits} from '../util.js';\nimport ViewHint from '../ViewHint.js';\nimport Control from '../control/Control.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';\nimport {easeOut} from '../easing.js';\nimport {listen} from '../events.js';\nimport {stopPropagation} from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport {clamp} from '../math.js';\nimport PointerEventType from '../pointer/EventType.js';\nimport PointerEventHandler from '../pointer/PointerEventHandler.js';\n\n\n/**\n * The enum for available directions.\n *\n * @enum {number}\n */\nconst Direction = {\n VERTICAL: 0,\n HORIZONTAL: 1\n};\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-zoomslider'] CSS class name.\n * @property {number} [duration=200] Animation duration in milliseconds.\n * @property {function(module:ol/MapEvent)} [render] Function called when the control\n * should be re-rendered. This is called in a `requestAnimationFrame` callback.\n */\n\n\n/**\n * @classdesc\n * A slider type of control for zooming.\n *\n * Example:\n *\n * map.addControl(new ZoomSlider());\n *\n * @constructor\n * @extends {module:ol/control/Control}\n * @param {module:ol/control/ZoomSlider~Options=} opt_options Zoom slider options.\n * @api\n */\nconst ZoomSlider = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n /**\n * Will hold the current resolution of the view.\n *\n * @type {number|undefined}\n * @private\n */\n this.currentResolution_ = undefined;\n\n /**\n * The direction of the slider. Will be determined from actual display of the\n * container and defaults to Direction.VERTICAL.\n *\n * @type {Direction}\n * @private\n */\n this.direction_ = Direction.VERTICAL;\n\n /**\n * @type {boolean}\n * @private\n */\n this.dragging_;\n\n /**\n * @type {number}\n * @private\n */\n this.heightLimit_ = 0;\n\n /**\n * @type {number}\n * @private\n */\n this.widthLimit_ = 0;\n\n /**\n * @type {number|undefined}\n * @private\n */\n this.previousX_;\n\n /**\n * @type {number|undefined}\n * @private\n */\n this.previousY_;\n\n /**\n * The calculated thumb size (border box plus margins). Set when initSlider_\n * is called.\n * @type {module:ol/size~Size}\n * @private\n */\n this.thumbSize_ = null;\n\n /**\n * Whether the slider is initialized.\n * @type {boolean}\n * @private\n */\n this.sliderInitialized_ = false;\n\n /**\n * @type {number}\n * @private\n */\n this.duration_ = options.duration !== undefined ? options.duration : 200;\n\n const className = options.className !== undefined ? options.className : 'ol-zoomslider';\n const thumbElement = document.createElement('button');\n thumbElement.setAttribute('type', 'button');\n thumbElement.className = className + '-thumb ' + CLASS_UNSELECTABLE;\n const containerElement = document.createElement('div');\n containerElement.className = className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n containerElement.appendChild(thumbElement);\n /**\n * @type {module:ol/pointer/PointerEventHandler}\n * @private\n */\n this.dragger_ = new PointerEventHandler(containerElement);\n\n listen(this.dragger_, PointerEventType.POINTERDOWN,\n this.handleDraggerStart_, this);\n listen(this.dragger_, PointerEventType.POINTERMOVE,\n this.handleDraggerDrag_, this);\n listen(this.dragger_, PointerEventType.POINTERUP,\n this.handleDraggerEnd_, this);\n\n listen(containerElement, EventType.CLICK, this.handleContainerClick_, this);\n listen(thumbElement, EventType.CLICK, stopPropagation);\n\n Control.call(this, {\n element: containerElement,\n render: options.render || render\n });\n};\n\ninherits(ZoomSlider, Control);\n\n\n/**\n * @inheritDoc\n */\nZoomSlider.prototype.disposeInternal = function() {\n this.dragger_.dispose();\n Control.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * @inheritDoc\n */\nZoomSlider.prototype.setMap = function(map) {\n Control.prototype.setMap.call(this, map);\n if (map) {\n map.render();\n }\n};\n\n\n/**\n * Initializes the slider element. This will determine and set this controls\n * direction_ and also constrain the dragging of the thumb to always be within\n * the bounds of the container.\n *\n * @private\n */\nZoomSlider.prototype.initSlider_ = function() {\n const container = this.element;\n const containerSize = {\n width: container.offsetWidth, height: container.offsetHeight\n };\n\n const thumb = container.firstElementChild;\n const computedStyle = getComputedStyle(thumb);\n const thumbWidth = thumb.offsetWidth +\n parseFloat(computedStyle['marginRight']) +\n parseFloat(computedStyle['marginLeft']);\n const thumbHeight = thumb.offsetHeight +\n parseFloat(computedStyle['marginTop']) +\n parseFloat(computedStyle['marginBottom']);\n this.thumbSize_ = [thumbWidth, thumbHeight];\n\n if (containerSize.width > containerSize.height) {\n this.direction_ = Direction.HORIZONTAL;\n this.widthLimit_ = containerSize.width - thumbWidth;\n } else {\n this.direction_ = Direction.VERTICAL;\n this.heightLimit_ = containerSize.height - thumbHeight;\n }\n this.sliderInitialized_ = true;\n};\n\n\n/**\n * Update the zoomslider element.\n * @param {module:ol/MapEvent} mapEvent Map event.\n * @this {module:ol/control/ZoomSlider}\n * @api\n */\nexport function render(mapEvent) {\n if (!mapEvent.frameState) {\n return;\n }\n if (!this.sliderInitialized_) {\n this.initSlider_();\n }\n const res = mapEvent.frameState.viewState.resolution;\n if (res !== this.currentResolution_) {\n this.currentResolution_ = res;\n this.setThumbPosition_(res);\n }\n}\n\n\n/**\n * @param {Event} event The browser event to handle.\n * @private\n */\nZoomSlider.prototype.handleContainerClick_ = function(event) {\n const view = this.getMap().getView();\n\n const relativePosition = this.getRelativePosition_(\n event.offsetX - this.thumbSize_[0] / 2,\n event.offsetY - this.thumbSize_[1] / 2);\n\n const resolution = this.getResolutionForPosition_(relativePosition);\n\n view.animate({\n resolution: view.constrainResolution(resolution),\n duration: this.duration_,\n easing: easeOut\n });\n};\n\n\n/**\n * Handle dragger start events.\n * @param {module:ol/pointer/PointerEvent} event The drag event.\n * @private\n */\nZoomSlider.prototype.handleDraggerStart_ = function(event) {\n if (!this.dragging_ && event.originalEvent.target === this.element.firstElementChild) {\n this.getMap().getView().setHint(ViewHint.INTERACTING, 1);\n this.previousX_ = event.clientX;\n this.previousY_ = event.clientY;\n this.dragging_ = true;\n }\n};\n\n\n/**\n * Handle dragger drag events.\n *\n * @param {module:ol/pointer/PointerEvent|Event} event The drag event.\n * @private\n */\nZoomSlider.prototype.handleDraggerDrag_ = function(event) {\n if (this.dragging_) {\n const element = this.element.firstElementChild;\n const deltaX = event.clientX - this.previousX_ + parseInt(element.style.left, 10);\n const deltaY = event.clientY - this.previousY_ + parseInt(element.style.top, 10);\n const relativePosition = this.getRelativePosition_(deltaX, deltaY);\n this.currentResolution_ = this.getResolutionForPosition_(relativePosition);\n this.getMap().getView().setResolution(this.currentResolution_);\n this.setThumbPosition_(this.currentResolution_);\n this.previousX_ = event.clientX;\n this.previousY_ = event.clientY;\n }\n};\n\n\n/**\n * Handle dragger end events.\n * @param {module:ol/pointer/PointerEvent|Event} event The drag event.\n * @private\n */\nZoomSlider.prototype.handleDraggerEnd_ = function(event) {\n if (this.dragging_) {\n const view = this.getMap().getView();\n view.setHint(ViewHint.INTERACTING, -1);\n\n view.animate({\n resolution: view.constrainResolution(this.currentResolution_),\n duration: this.duration_,\n easing: easeOut\n });\n\n this.dragging_ = false;\n this.previousX_ = undefined;\n this.previousY_ = undefined;\n }\n};\n\n\n/**\n * Positions the thumb inside its container according to the given resolution.\n *\n * @param {number} res The res.\n * @private\n */\nZoomSlider.prototype.setThumbPosition_ = function(res) {\n const position = this.getPositionForResolution_(res);\n const thumb = this.element.firstElementChild;\n\n if (this.direction_ == Direction.HORIZONTAL) {\n thumb.style.left = this.widthLimit_ * position + 'px';\n } else {\n thumb.style.top = this.heightLimit_ * position + 'px';\n }\n};\n\n\n/**\n * Calculates the relative position of the thumb given x and y offsets. The\n * relative position scales from 0 to 1. The x and y offsets are assumed to be\n * in pixel units within the dragger limits.\n *\n * @param {number} x Pixel position relative to the left of the slider.\n * @param {number} y Pixel position relative to the top of the slider.\n * @return {number} The relative position of the thumb.\n * @private\n */\nZoomSlider.prototype.getRelativePosition_ = function(x, y) {\n let amount;\n if (this.direction_ === Direction.HORIZONTAL) {\n amount = x / this.widthLimit_;\n } else {\n amount = y / this.heightLimit_;\n }\n return clamp(amount, 0, 1);\n};\n\n\n/**\n * Calculates the corresponding resolution of the thumb given its relative\n * position (where 0 is the minimum and 1 is the maximum).\n *\n * @param {number} position The relative position of the thumb.\n * @return {number} The corresponding resolution.\n * @private\n */\nZoomSlider.prototype.getResolutionForPosition_ = function(position) {\n const fn = this.getMap().getView().getResolutionForValueFunction();\n return fn(1 - position);\n};\n\n\n/**\n * Determines the relative position of the slider for the given resolution. A\n * relative position of 0 corresponds to the minimum view resolution. A\n * relative position of 1 corresponds to the maximum view resolution.\n *\n * @param {number} res The resolution.\n * @return {number} The relative position value (between 0 and 1).\n * @private\n */\nZoomSlider.prototype.getPositionForResolution_ = function(res) {\n const fn = this.getMap().getView().getValueForResolutionFunction();\n return 1 - fn(res);\n};\n\nexport default ZoomSlider;\n","/**\n * @module ol/control/ZoomToExtent\n */\nimport {inherits} from '../util.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport Control from '../control/Control.js';\nimport {CLASS_CONTROL, CLASS_UNSELECTABLE} from '../css.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-zoom-extent'] Class name.\n * @property {Element|string} [target] Specify a target if you want the control\n * to be rendered outside of the map's viewport.\n * @property {string|Element} [label='E'] Text label to use for the button.\n * Instead of text, also an element (e.g. a `span` element) can be used.\n * @property {string} [tipLabel='Fit to extent'] Text label to use for the button tip.\n * @property {module:ol/extent~Extent} [extent] The extent to zoom to. If undefined the validity\n * extent of the view projection is used.\n */\n\n\n/**\n * @classdesc\n * A button control which, when pressed, changes the map view to a specific\n * extent. To style this control use the css selector `.ol-zoom-extent`.\n *\n * @constructor\n * @extends {module:ol/control/Control}\n * @param {module:ol/control/ZoomToExtent~Options=} opt_options Options.\n * @api\n */\nconst ZoomToExtent = function(opt_options) {\n const options = opt_options ? opt_options : {};\n\n /**\n * @type {module:ol/extent~Extent}\n * @protected\n */\n this.extent = options.extent ? options.extent : null;\n\n const className = options.className !== undefined ? options.className : 'ol-zoom-extent';\n\n const label = options.label !== undefined ? options.label : 'E';\n const tipLabel = options.tipLabel !== undefined ? options.tipLabel : 'Fit to extent';\n const button = document.createElement('button');\n button.setAttribute('type', 'button');\n button.title = tipLabel;\n button.appendChild(\n typeof label === 'string' ? document.createTextNode(label) : label\n );\n\n listen(button, EventType.CLICK, this.handleClick_, this);\n\n const cssClasses = className + ' ' + CLASS_UNSELECTABLE + ' ' + CLASS_CONTROL;\n const element = document.createElement('div');\n element.className = cssClasses;\n element.appendChild(button);\n\n Control.call(this, {\n element: element,\n target: options.target\n });\n};\n\ninherits(ZoomToExtent, Control);\n\n\n/**\n * @param {Event} event The event to handle\n * @private\n */\nZoomToExtent.prototype.handleClick_ = function(event) {\n event.preventDefault();\n this.handleZoomToExtent();\n};\n\n\n/**\n * @protected\n */\nZoomToExtent.prototype.handleZoomToExtent = function() {\n const map = this.getMap();\n const view = map.getView();\n const extent = !this.extent ? view.getProjection().getExtent() : this.extent;\n view.fit(extent);\n};\nexport default ZoomToExtent;\n","/**\n * @module ol/webgl/Shader\n */\nimport {FALSE} from '../functions.js';\n\n/**\n * @constructor\n * @abstract\n * @param {string} source Source.\n * @struct\n */\nconst WebGLShader = function(source) {\n\n /**\n * @private\n * @type {string}\n */\n this.source_ = source;\n\n};\n\n\n/**\n * @abstract\n * @return {number} Type.\n */\nWebGLShader.prototype.getType = function() {};\n\n\n/**\n * @return {string} Source.\n */\nWebGLShader.prototype.getSource = function() {\n return this.source_;\n};\n\n\n/**\n * @return {boolean} Is animated?\n */\nWebGLShader.prototype.isAnimated = FALSE;\nexport default WebGLShader;\n","/**\n * @module ol/webgl/Fragment\n */\nimport {inherits} from '../util.js';\nimport {FRAGMENT_SHADER} from '../webgl.js';\nimport WebGLShader from '../webgl/Shader.js';\n\n/**\n * @constructor\n * @extends {module:ol/webgl/Shader}\n * @param {string} source Source.\n * @struct\n */\nconst WebGLFragment = function(source) {\n WebGLShader.call(this, source);\n};\n\ninherits(WebGLFragment, WebGLShader);\n\n\n/**\n * @inheritDoc\n */\nWebGLFragment.prototype.getType = function() {\n return FRAGMENT_SHADER;\n};\nexport default WebGLFragment;\n","/**\n * @module ol/webgl/Vertex\n */\nimport {inherits} from '../util.js';\nimport {VERTEX_SHADER} from '../webgl.js';\nimport WebGLShader from '../webgl/Shader.js';\n\n/**\n * @constructor\n * @extends {module:ol/webgl/Shader}\n * @param {string} source Source.\n * @struct\n */\nconst WebGLVertex = function(source) {\n WebGLShader.call(this, source);\n};\n\ninherits(WebGLVertex, WebGLShader);\n\n\n/**\n * @inheritDoc\n */\nWebGLVertex.prototype.getType = function() {\n return VERTEX_SHADER;\n};\nexport default WebGLVertex;\n","/**\n * @module ol/render/webgl/circlereplay/defaultshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\nimport WebGLFragment from '../../../webgl/Fragment.js';\nimport WebGLVertex from '../../../webgl/Vertex.js';\n\nexport const fragment = new WebGLFragment(DEBUG_WEBGL ?\n 'precision mediump float;\\nvarying vec2 v_center;\\nvarying vec2 v_offset;\\nvarying float v_halfWidth;\\nvarying float v_pixelRatio;\\n\\n\\n\\nuniform float u_opacity;\\nuniform vec4 u_fillColor;\\nuniform vec4 u_strokeColor;\\nuniform vec2 u_size;\\n\\nvoid main(void) {\\n vec2 windowCenter = vec2((v_center.x + 1.0) / 2.0 * u_size.x * v_pixelRatio,\\n (v_center.y + 1.0) / 2.0 * u_size.y * v_pixelRatio);\\n vec2 windowOffset = vec2((v_offset.x + 1.0) / 2.0 * u_size.x * v_pixelRatio,\\n (v_offset.y + 1.0) / 2.0 * u_size.y * v_pixelRatio);\\n float radius = length(windowCenter - windowOffset);\\n float dist = length(windowCenter - gl_FragCoord.xy);\\n if (dist > radius + v_halfWidth) {\\n if (u_strokeColor.a == 0.0) {\\n gl_FragColor = u_fillColor;\\n } else {\\n gl_FragColor = u_strokeColor;\\n }\\n gl_FragColor.a = gl_FragColor.a - (dist - (radius + v_halfWidth));\\n } else if (u_fillColor.a == 0.0) {\\n // Hooray, no fill, just stroke. We can use real antialiasing.\\n gl_FragColor = u_strokeColor;\\n if (dist < radius - v_halfWidth) {\\n gl_FragColor.a = gl_FragColor.a - (radius - v_halfWidth - dist);\\n }\\n } else {\\n gl_FragColor = u_fillColor;\\n float strokeDist = radius - v_halfWidth;\\n float antialias = 2.0 * v_pixelRatio;\\n if (dist > strokeDist) {\\n gl_FragColor = u_strokeColor;\\n } else if (dist >= strokeDist - antialias) {\\n float step = smoothstep(strokeDist - antialias, strokeDist, dist);\\n gl_FragColor = mix(u_fillColor, u_strokeColor, step);\\n }\\n }\\n gl_FragColor.a = gl_FragColor.a * u_opacity;\\n if (gl_FragColor.a <= 0.0) {\\n discard;\\n }\\n}\\n' :\n 'precision mediump float;varying vec2 a;varying vec2 b;varying float c;varying float d;uniform float m;uniform vec4 n;uniform vec4 o;uniform vec2 p;void main(void){vec2 windowCenter=vec2((a.x+1.0)/2.0*p.x*d,(a.y+1.0)/2.0*p.y*d);vec2 windowOffset=vec2((b.x+1.0)/2.0*p.x*d,(b.y+1.0)/2.0*p.y*d);float radius=length(windowCenter-windowOffset);float dist=length(windowCenter-gl_FragCoord.xy);if(dist>radius+c){if(o.a==0.0){gl_FragColor=n;}else{gl_FragColor=o;}gl_FragColor.a=gl_FragColor.a-(dist-(radius+c));}else if(n.a==0.0){gl_FragColor=o;if(dist<radius-c){gl_FragColor.a=gl_FragColor.a-(radius-c-dist);}} else{gl_FragColor=n;float strokeDist=radius-c;float antialias=2.0*d;if(dist>strokeDist){gl_FragColor=o;}else if(dist>=strokeDist-antialias){float step=smoothstep(strokeDist-antialias,strokeDist,dist);gl_FragColor=mix(n,o,step);}} gl_FragColor.a=gl_FragColor.a*m;if(gl_FragColor.a<=0.0){discard;}}');\n\nexport const vertex = new WebGLVertex(DEBUG_WEBGL ?\n 'varying vec2 v_center;\\nvarying vec2 v_offset;\\nvarying float v_halfWidth;\\nvarying float v_pixelRatio;\\n\\n\\nattribute vec2 a_position;\\nattribute float a_instruction;\\nattribute float a_radius;\\n\\nuniform mat4 u_projectionMatrix;\\nuniform mat4 u_offsetScaleMatrix;\\nuniform mat4 u_offsetRotateMatrix;\\nuniform float u_lineWidth;\\nuniform float u_pixelRatio;\\n\\nvoid main(void) {\\n mat4 offsetMatrix = u_offsetScaleMatrix * u_offsetRotateMatrix;\\n v_center = vec4(u_projectionMatrix * vec4(a_position, 0.0, 1.0)).xy;\\n v_pixelRatio = u_pixelRatio;\\n float lineWidth = u_lineWidth * u_pixelRatio;\\n v_halfWidth = lineWidth / 2.0;\\n if (lineWidth == 0.0) {\\n lineWidth = 2.0 * u_pixelRatio;\\n }\\n vec2 offset;\\n // Radius with anitaliasing (roughly).\\n float radius = a_radius + 3.0 * u_pixelRatio;\\n // Until we get gl_VertexID in WebGL, we store an instruction.\\n if (a_instruction == 0.0) {\\n // Offsetting the edges of the triangle by lineWidth / 2 is necessary, however\\n // we should also leave some space for the antialiasing, thus we offset by lineWidth.\\n offset = vec2(-1.0, 1.0);\\n } else if (a_instruction == 1.0) {\\n offset = vec2(-1.0, -1.0);\\n } else if (a_instruction == 2.0) {\\n offset = vec2(1.0, -1.0);\\n } else {\\n offset = vec2(1.0, 1.0);\\n }\\n\\n gl_Position = u_projectionMatrix * vec4(a_position + offset * radius, 0.0, 1.0) +\\n offsetMatrix * vec4(offset * lineWidth, 0.0, 0.0);\\n v_offset = vec4(u_projectionMatrix * vec4(a_position.x + a_radius, a_position.y,\\n 0.0, 1.0)).xy;\\n\\n if (distance(v_center, v_offset) > 20000.0) {\\n gl_Position = vec4(v_center, 0.0, 1.0);\\n }\\n}\\n\\n\\n' :\n 'varying vec2 a;varying vec2 b;varying float c;varying float d;attribute vec2 e;attribute float f;attribute float g;uniform mat4 h;uniform mat4 i;uniform mat4 j;uniform float k;uniform float l;void main(void){mat4 offsetMatrix=i*j;a=vec4(h*vec4(e,0.0,1.0)).xy;d=l;float lineWidth=k*l;c=lineWidth/2.0;if(lineWidth==0.0){lineWidth=2.0*l;}vec2 offset;float radius=g+3.0*l;if(f==0.0){offset=vec2(-1.0,1.0);}else if(f==1.0){offset=vec2(-1.0,-1.0);}else if(f==2.0){offset=vec2(1.0,-1.0);}else{offset=vec2(1.0,1.0);}gl_Position=h*vec4(e+offset*radius,0.0,1.0)+offsetMatrix*vec4(offset*lineWidth,0.0,0.0);b=vec4(h*vec4(e.x+g,e.y,0.0,1.0)).xy;if(distance(a,b)>20000.0){gl_Position=vec4(a,0.0,1.0);}}');\n","/**\n * @module ol/render/webgl/circlereplay/defaultshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../../webgl.js';\n\n/**\n * @constructor\n * @param {WebGLRenderingContext} gl GL.\n * @param {WebGLProgram} program Program.\n * @struct\n */\nconst Locations = function(gl, program) {\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_projectionMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'h');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_offsetScaleMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_offsetScaleMatrix' : 'i');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_offsetRotateMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_offsetRotateMatrix' : 'j');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_lineWidth = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_lineWidth' : 'k');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_pixelRatio = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_pixelRatio' : 'l');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_opacity = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_opacity' : 'm');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_fillColor = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_fillColor' : 'n');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_strokeColor = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_strokeColor' : 'o');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_size = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_size' : 'p');\n\n /**\n * @type {number}\n */\n this.a_position = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_position' : 'e');\n\n /**\n * @type {number}\n */\n this.a_instruction = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_instruction' : 'f');\n\n /**\n * @type {number}\n */\n this.a_radius = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_radius' : 'g');\n};\n\nexport default Locations;\n","/**\n * @module ol/vec/mat4\n */\n\n\n/**\n * @return {Array.<number>} 4x4 matrix representing a 3D identity transform.\n */\nexport function create() {\n return [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1];\n}\n\n\n/**\n * @param {Array.<number>} mat4 Flattened 4x4 matrix receiving the result.\n * @param {module:ol/transform~Transform} transform Transformation matrix.\n * @return {Array.<number>} 2D transformation matrix as flattened 4x4 matrix.\n */\nexport function fromTransform(mat4, transform) {\n mat4[0] = transform[0];\n mat4[1] = transform[1];\n mat4[4] = transform[2];\n mat4[5] = transform[3];\n mat4[12] = transform[4];\n mat4[13] = transform[5];\n return mat4;\n}\n","/**\n * @module ol/render/webgl/Replay\n */\nimport {inherits} from '../../util.js';\nimport {getCenter} from '../../extent.js';\nimport VectorContext from '../VectorContext.js';\nimport {\n create as createTransform,\n reset as resetTransform,\n rotate as rotateTransform,\n scale as scaleTransform,\n translate as translateTransform\n} from '../../transform.js';\nimport {create, fromTransform} from '../../vec/mat4.js';\nimport {ARRAY_BUFFER, ELEMENT_ARRAY_BUFFER, TRIANGLES,\n UNSIGNED_INT, UNSIGNED_SHORT} from '../../webgl.js';\n\n/**\n * @constructor\n * @abstract\n * @extends {module:ol/render/VectorContext}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Max extent.\n * @struct\n */\nconst WebGLReplay = function(tolerance, maxExtent) {\n VectorContext.call(this);\n\n /**\n * @protected\n * @type {number}\n */\n this.tolerance = tolerance;\n\n /**\n * @protected\n * @const\n * @type {module:ol/extent~Extent}\n */\n this.maxExtent = maxExtent;\n\n /**\n * The origin of the coordinate system for the point coordinates sent to\n * the GPU. To eliminate jitter caused by precision problems in the GPU\n * we use the \"Rendering Relative to Eye\" technique described in the \"3D\n * Engine Design for Virtual Globes\" book.\n * @protected\n * @type {module:ol/coordinate~Coordinate}\n */\n this.origin = getCenter(maxExtent);\n\n /**\n * @private\n * @type {module:ol/transform~Transform}\n */\n this.projectionMatrix_ = createTransform();\n\n /**\n * @private\n * @type {module:ol/transform~Transform}\n */\n this.offsetRotateMatrix_ = createTransform();\n\n /**\n * @private\n * @type {module:ol/transform~Transform}\n */\n this.offsetScaleMatrix_ = createTransform();\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.tmpMat4_ = create();\n\n /**\n * @protected\n * @type {Array.<number>}\n */\n this.indices = [];\n\n /**\n * @protected\n * @type {?module:ol/webgl/Buffer}\n */\n this.indicesBuffer = null;\n\n /**\n * Start index per feature (the index).\n * @protected\n * @type {Array.<number>}\n */\n this.startIndices = [];\n\n /**\n * Start index per feature (the feature).\n * @protected\n * @type {Array.<module:ol/Feature|module:ol/render/Feature>}\n */\n this.startIndicesFeature = [];\n\n /**\n * @protected\n * @type {Array.<number>}\n */\n this.vertices = [];\n\n /**\n * @protected\n * @type {?module:ol/webgl/Buffer}\n */\n this.verticesBuffer = null;\n\n /**\n * Optional parameter for PolygonReplay instances.\n * @protected\n * @type {module:ol/render/webgl/LineStringReplay|undefined}\n */\n this.lineStringReplay = undefined;\n\n};\n\ninherits(WebGLReplay, VectorContext);\n\n\n/**\n * @abstract\n * @param {module:ol/webgl/Context} context WebGL context.\n * @return {function()} Delete resources function.\n */\nWebGLReplay.prototype.getDeleteResourcesFunction = function(context) {};\n\n\n/**\n * @abstract\n * @param {module:ol/webgl/Context} context Context.\n */\nWebGLReplay.prototype.finish = function(context) {};\n\n\n/**\n * @abstract\n * @protected\n * @param {WebGLRenderingContext} gl gl.\n * @param {module:ol/webgl/Context} context Context.\n * @param {module:ol/size~Size} size Size.\n * @param {number} pixelRatio Pixel ratio.\n * @return {module:ol/render/webgl/circlereplay/defaultshader/Locations|\n module:ol/render/webgl/linestringreplay/defaultshader/Locations|\n module:ol/render/webgl/polygonreplay/defaultshader/Locations|\n module:ol/render/webgl/texturereplay/defaultshader/Locations} Locations.\n */\nWebGLReplay.prototype.setUpProgram = function(gl, context, size, pixelRatio) {};\n\n\n/**\n * @abstract\n * @protected\n * @param {WebGLRenderingContext} gl gl.\n * @param {module:ol/render/webgl/circlereplay/defaultshader/Locations|\n module:ol/render/webgl/linestringreplay/defaultshader/Locations|\n module:ol/render/webgl/polygonreplay/defaultshader/Locations|\n module:ol/render/webgl/texturereplay/defaultshader/Locations} locations Locations.\n */\nWebGLReplay.prototype.shutDownProgram = function(gl, locations) {};\n\n\n/**\n * @abstract\n * @protected\n * @param {WebGLRenderingContext} gl gl.\n * @param {module:ol/webgl/Context} context Context.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features to skip.\n * @param {boolean} hitDetection Hit detection mode.\n */\nWebGLReplay.prototype.drawReplay = function(gl, context, skippedFeaturesHash, hitDetection) {};\n\n\n/**\n * @abstract\n * @protected\n * @param {WebGLRenderingContext} gl gl.\n * @param {module:ol/webgl/Context} context Context.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features to skip.\n * @param {function((module:ol/Feature|module:ol/render/Feature)): T|undefined} featureCallback Feature callback.\n * @param {module:ol/extent~Extent=} opt_hitExtent Hit extent: Only features intersecting this extent are checked.\n * @return {T|undefined} Callback result.\n * @template T\n */\nWebGLReplay.prototype.drawHitDetectionReplayOneByOne = function(gl, context, skippedFeaturesHash, featureCallback, opt_hitExtent) {};\n\n\n/**\n * @protected\n * @param {WebGLRenderingContext} gl gl.\n * @param {module:ol/webgl/Context} context Context.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features to skip.\n * @param {function((module:ol/Feature|module:ol/render/Feature)): T|undefined} featureCallback Feature callback.\n * @param {boolean} oneByOne Draw features one-by-one for the hit-detecion.\n * @param {module:ol/extent~Extent=} opt_hitExtent Hit extent: Only features intersecting\n * this extent are checked.\n * @return {T|undefined} Callback result.\n * @template T\n */\nWebGLReplay.prototype.drawHitDetectionReplay = function(gl, context, skippedFeaturesHash,\n featureCallback, oneByOne, opt_hitExtent) {\n if (!oneByOne) {\n // draw all hit-detection features in \"once\" (by texture group)\n return this.drawHitDetectionReplayAll(gl, context,\n skippedFeaturesHash, featureCallback);\n } else {\n // draw hit-detection features one by one\n return this.drawHitDetectionReplayOneByOne(gl, context,\n skippedFeaturesHash, featureCallback, opt_hitExtent);\n }\n};\n\n\n/**\n * @protected\n * @param {WebGLRenderingContext} gl gl.\n * @param {module:ol/webgl/Context} context Context.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features to skip.\n * @param {function((module:ol/Feature|module:ol/render/Feature)): T|undefined} featureCallback Feature callback.\n * @return {T|undefined} Callback result.\n * @template T\n */\nWebGLReplay.prototype.drawHitDetectionReplayAll = function(gl, context, skippedFeaturesHash,\n featureCallback) {\n gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n this.drawReplay(gl, context, skippedFeaturesHash, true);\n\n const result = featureCallback(null);\n if (result) {\n return result;\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {module:ol/webgl/Context} context Context.\n * @param {module:ol/coordinate~Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {module:ol/size~Size} size Size.\n * @param {number} pixelRatio Pixel ratio.\n * @param {number} opacity Global opacity.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features to skip.\n * @param {function((module:ol/Feature|module:ol/render/Feature)): T|undefined} featureCallback Feature callback.\n * @param {boolean} oneByOne Draw features one-by-one for the hit-detecion.\n * @param {module:ol/extent~Extent=} opt_hitExtent Hit extent: Only features intersecting\n * this extent are checked.\n * @return {T|undefined} Callback result.\n * @template T\n */\nWebGLReplay.prototype.replay = function(context,\n center, resolution, rotation, size, pixelRatio,\n opacity, skippedFeaturesHash,\n featureCallback, oneByOne, opt_hitExtent) {\n const gl = context.getGL();\n let tmpStencil, tmpStencilFunc, tmpStencilMaskVal, tmpStencilRef, tmpStencilMask,\n tmpStencilOpFail, tmpStencilOpPass, tmpStencilOpZFail;\n\n if (this.lineStringReplay) {\n tmpStencil = gl.isEnabled(gl.STENCIL_TEST);\n tmpStencilFunc = gl.getParameter(gl.STENCIL_FUNC);\n tmpStencilMaskVal = gl.getParameter(gl.STENCIL_VALUE_MASK);\n tmpStencilRef = gl.getParameter(gl.STENCIL_REF);\n tmpStencilMask = gl.getParameter(gl.STENCIL_WRITEMASK);\n tmpStencilOpFail = gl.getParameter(gl.STENCIL_FAIL);\n tmpStencilOpPass = gl.getParameter(gl.STENCIL_PASS_DEPTH_PASS);\n tmpStencilOpZFail = gl.getParameter(gl.STENCIL_PASS_DEPTH_FAIL);\n\n gl.enable(gl.STENCIL_TEST);\n gl.clear(gl.STENCIL_BUFFER_BIT);\n gl.stencilMask(255);\n gl.stencilFunc(gl.ALWAYS, 1, 255);\n gl.stencilOp(gl.KEEP, gl.KEEP, gl.REPLACE);\n\n this.lineStringReplay.replay(context,\n center, resolution, rotation, size, pixelRatio,\n opacity, skippedFeaturesHash,\n featureCallback, oneByOne, opt_hitExtent);\n\n gl.stencilMask(0);\n gl.stencilFunc(gl.NOTEQUAL, 1, 255);\n }\n\n context.bindBuffer(ARRAY_BUFFER, this.verticesBuffer);\n\n context.bindBuffer(ELEMENT_ARRAY_BUFFER, this.indicesBuffer);\n\n const locations = this.setUpProgram(gl, context, size, pixelRatio);\n\n // set the \"uniform\" values\n const projectionMatrix = resetTransform(this.projectionMatrix_);\n scaleTransform(projectionMatrix, 2 / (resolution * size[0]), 2 / (resolution * size[1]));\n rotateTransform(projectionMatrix, -rotation);\n translateTransform(projectionMatrix, -(center[0] - this.origin[0]), -(center[1] - this.origin[1]));\n\n const offsetScaleMatrix = resetTransform(this.offsetScaleMatrix_);\n scaleTransform(offsetScaleMatrix, 2 / size[0], 2 / size[1]);\n\n const offsetRotateMatrix = resetTransform(this.offsetRotateMatrix_);\n if (rotation !== 0) {\n rotateTransform(offsetRotateMatrix, -rotation);\n }\n\n gl.uniformMatrix4fv(locations.u_projectionMatrix, false,\n fromTransform(this.tmpMat4_, projectionMatrix));\n gl.uniformMatrix4fv(locations.u_offsetScaleMatrix, false,\n fromTransform(this.tmpMat4_, offsetScaleMatrix));\n gl.uniformMatrix4fv(locations.u_offsetRotateMatrix, false,\n fromTransform(this.tmpMat4_, offsetRotateMatrix));\n gl.uniform1f(locations.u_opacity, opacity);\n\n // draw!\n let result;\n if (featureCallback === undefined) {\n this.drawReplay(gl, context, skippedFeaturesHash, false);\n } else {\n // draw feature by feature for the hit-detection\n result = this.drawHitDetectionReplay(gl, context, skippedFeaturesHash,\n featureCallback, oneByOne, opt_hitExtent);\n }\n\n // disable the vertex attrib arrays\n this.shutDownProgram(gl, locations);\n\n if (this.lineStringReplay) {\n if (!tmpStencil) {\n gl.disable(gl.STENCIL_TEST);\n }\n gl.clear(gl.STENCIL_BUFFER_BIT);\n gl.stencilFunc(/** @type {number} */ (tmpStencilFunc),\n /** @type {number} */ (tmpStencilRef), /** @type {number} */ (tmpStencilMaskVal));\n gl.stencilMask(/** @type {number} */ (tmpStencilMask));\n gl.stencilOp(/** @type {number} */ (tmpStencilOpFail),\n /** @type {number} */ (tmpStencilOpZFail), /** @type {number} */ (tmpStencilOpPass));\n }\n\n return result;\n};\n\n/**\n * @protected\n * @param {WebGLRenderingContext} gl gl.\n * @param {module:ol/webgl/Context} context Context.\n * @param {number} start Start index.\n * @param {number} end End index.\n */\nWebGLReplay.prototype.drawElements = function(\n gl, context, start, end) {\n const elementType = context.hasOESElementIndexUint ?\n UNSIGNED_INT : UNSIGNED_SHORT;\n const elementSize = context.hasOESElementIndexUint ? 4 : 2;\n\n const numItems = end - start;\n const offsetInBytes = start * elementSize;\n gl.drawElements(TRIANGLES, numItems, elementType, offsetInBytes);\n};\nexport default WebGLReplay;\n","/**\n * @module ol/render/webgl\n */\n\n\n/**\n * @const\n * @type {string}\n */\nexport const DEFAULT_FONT = '10px sans-serif';\n\n\n/**\n * @const\n * @type {module:ol/color~Color}\n */\nexport const DEFAULT_FILLSTYLE = [0.0, 0.0, 0.0, 1.0];\n\n\n/**\n * @const\n * @type {string}\n */\nexport const DEFAULT_LINECAP = 'round';\n\n\n/**\n * @const\n * @type {Array.<number>}\n */\nexport const DEFAULT_LINEDASH = [];\n\n\n/**\n * @const\n * @type {number}\n */\nexport const DEFAULT_LINEDASHOFFSET = 0;\n\n\n/**\n * @const\n * @type {string}\n */\nexport const DEFAULT_LINEJOIN = 'round';\n\n\n/**\n * @const\n * @type {number}\n */\nexport const DEFAULT_MITERLIMIT = 10;\n\n/**\n * @const\n * @type {module:ol/color~Color}\n */\nexport const DEFAULT_STROKESTYLE = [0.0, 0.0, 0.0, 1.0];\n\n\n/**\n * @const\n * @type {number}\n */\nexport const DEFAULT_TEXTALIGN = 0.5;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const DEFAULT_TEXTBASELINE = 0.5;\n\n\n/**\n * @const\n * @type {number}\n */\nexport const DEFAULT_LINEWIDTH = 1;\n\n/**\n * @const\n * @type {number}\n */\nexport const EPSILON = Number.EPSILON || 2.220446049250313e-16;\n\n/**\n * Calculates the orientation of a triangle based on the determinant method.\n * @param {number} x1 First X coordinate.\n * @param {number} y1 First Y coordinate.\n * @param {number} x2 Second X coordinate.\n * @param {number} y2 Second Y coordinate.\n * @param {number} x3 Third X coordinate.\n * @param {number} y3 Third Y coordinate.\n * @return {boolean|undefined} Triangle is clockwise.\n */\nexport const triangleIsCounterClockwise = function(x1, y1, x2, y2, x3, y3) {\n const area = (x2 - x1) * (y3 - y1) - (x3 - x1) * (y2 - y1);\n return (area <= EPSILON && area >= -EPSILON) ?\n undefined : area > 0;\n};\n\n","/**\n * @module ol/webgl/Buffer\n */\nimport {STATIC_DRAW, STREAM_DRAW, DYNAMIC_DRAW} from '../webgl.js';\n\n/**\n * @enum {number}\n */\nconst BufferUsage = {\n STATIC_DRAW: STATIC_DRAW,\n STREAM_DRAW: STREAM_DRAW,\n DYNAMIC_DRAW: DYNAMIC_DRAW\n};\n\n/**\n * @constructor\n * @param {Array.<number>=} opt_arr Array.\n * @param {number=} opt_usage Usage.\n * @struct\n */\nconst WebGLBuffer = function(opt_arr, opt_usage) {\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.arr_ = opt_arr !== undefined ? opt_arr : [];\n\n /**\n * @private\n * @type {number}\n */\n this.usage_ = opt_usage !== undefined ? opt_usage : BufferUsage.STATIC_DRAW;\n\n};\n\n\n/**\n * @return {Array.<number>} Array.\n */\nWebGLBuffer.prototype.getArray = function() {\n return this.arr_;\n};\n\n\n/**\n * @return {number} Usage.\n */\nWebGLBuffer.prototype.getUsage = function() {\n return this.usage_;\n};\n\nexport default WebGLBuffer;\n","/**\n * @module ol/render/webgl/CircleReplay\n */\nimport {getUid, inherits} from '../../util.js';\nimport {equals} from '../../array.js';\nimport {asArray} from '../../color.js';\nimport {intersects} from '../../extent.js';\nimport {isEmpty} from '../../obj.js';\nimport {translate} from '../../geom/flat/transform.js';\nimport {fragment, vertex} from '../webgl/circlereplay/defaultshader.js';\nimport Locations from '../webgl/circlereplay/defaultshader/Locations.js';\nimport WebGLReplay from '../webgl/Replay.js';\nimport {DEFAULT_LINEDASH, DEFAULT_LINEDASHOFFSET, DEFAULT_STROKESTYLE,\n DEFAULT_FILLSTYLE, DEFAULT_LINEWIDTH} from '../webgl.js';\nimport {FLOAT} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n/**\n * @constructor\n * @extends {module:ol/render/webgl/Replay}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Max extent.\n * @struct\n */\nconst WebGLCircleReplay = function(tolerance, maxExtent) {\n WebGLReplay.call(this, tolerance, maxExtent);\n\n /**\n * @private\n * @type {module:ol/render/webgl/circlereplay/defaultshader/Locations}\n */\n this.defaultLocations_ = null;\n\n /**\n * @private\n * @type {Array.<Array.<Array.<number>|number>>}\n */\n this.styles_ = [];\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.styleIndices_ = [];\n\n /**\n * @private\n * @type {number}\n */\n this.radius_ = 0;\n\n /**\n * @private\n * @type {{fillColor: (Array.<number>|null),\n * strokeColor: (Array.<number>|null),\n * lineDash: Array.<number>,\n * lineDashOffset: (number|undefined),\n * lineWidth: (number|undefined),\n * changed: boolean}|null}\n */\n this.state_ = {\n fillColor: null,\n strokeColor: null,\n lineDash: null,\n lineDashOffset: undefined,\n lineWidth: undefined,\n changed: false\n };\n\n};\n\ninherits(WebGLCircleReplay, WebGLReplay);\n\n\n/**\n * @private\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n */\nWebGLCircleReplay.prototype.drawCoordinates_ = function(\n flatCoordinates, offset, end, stride) {\n let numVertices = this.vertices.length;\n let numIndices = this.indices.length;\n let n = numVertices / 4;\n let i, ii;\n for (i = offset, ii = end; i < ii; i += stride) {\n this.vertices[numVertices++] = flatCoordinates[i];\n this.vertices[numVertices++] = flatCoordinates[i + 1];\n this.vertices[numVertices++] = 0;\n this.vertices[numVertices++] = this.radius_;\n\n this.vertices[numVertices++] = flatCoordinates[i];\n this.vertices[numVertices++] = flatCoordinates[i + 1];\n this.vertices[numVertices++] = 1;\n this.vertices[numVertices++] = this.radius_;\n\n this.vertices[numVertices++] = flatCoordinates[i];\n this.vertices[numVertices++] = flatCoordinates[i + 1];\n this.vertices[numVertices++] = 2;\n this.vertices[numVertices++] = this.radius_;\n\n this.vertices[numVertices++] = flatCoordinates[i];\n this.vertices[numVertices++] = flatCoordinates[i + 1];\n this.vertices[numVertices++] = 3;\n this.vertices[numVertices++] = this.radius_;\n\n this.indices[numIndices++] = n;\n this.indices[numIndices++] = n + 1;\n this.indices[numIndices++] = n + 2;\n\n this.indices[numIndices++] = n + 2;\n this.indices[numIndices++] = n + 3;\n this.indices[numIndices++] = n;\n\n n += 4;\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLCircleReplay.prototype.drawCircle = function(circleGeometry, feature) {\n const radius = circleGeometry.getRadius();\n const stride = circleGeometry.getStride();\n if (radius) {\n this.startIndices.push(this.indices.length);\n this.startIndicesFeature.push(feature);\n if (this.state_.changed) {\n this.styleIndices_.push(this.indices.length);\n this.state_.changed = false;\n }\n\n this.radius_ = radius;\n let flatCoordinates = circleGeometry.getFlatCoordinates();\n flatCoordinates = translate(flatCoordinates, 0, 2,\n stride, -this.origin[0], -this.origin[1]);\n this.drawCoordinates_(flatCoordinates, 0, 2, stride);\n } else {\n if (this.state_.changed) {\n this.styles_.pop();\n if (this.styles_.length) {\n const lastState = this.styles_[this.styles_.length - 1];\n this.state_.fillColor = /** @type {Array.<number>} */ (lastState[0]);\n this.state_.strokeColor = /** @type {Array.<number>} */ (lastState[1]);\n this.state_.lineWidth = /** @type {number} */ (lastState[2]);\n this.state_.changed = false;\n }\n }\n }\n};\n\n\n/**\n * @inheritDoc\n **/\nWebGLCircleReplay.prototype.finish = function(context) {\n // create, bind, and populate the vertices buffer\n this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n // create, bind, and populate the indices buffer\n this.indicesBuffer = new WebGLBuffer(this.indices);\n\n this.startIndices.push(this.indices.length);\n\n //Clean up, if there is nothing to draw\n if (this.styleIndices_.length === 0 && this.styles_.length > 0) {\n this.styles_ = [];\n }\n\n this.vertices = null;\n this.indices = null;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLCircleReplay.prototype.getDeleteResourcesFunction = function(context) {\n // We only delete our stuff here. The shaders and the program may\n // be used by other CircleReplay instances (for other layers). And\n // they will be deleted when disposing of the module:ol/webgl/Context~WebGLContext\n // object.\n const verticesBuffer = this.verticesBuffer;\n const indicesBuffer = this.indicesBuffer;\n return function() {\n context.deleteBuffer(verticesBuffer);\n context.deleteBuffer(indicesBuffer);\n };\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLCircleReplay.prototype.setUpProgram = function(gl, context, size, pixelRatio) {\n // get the program\n const program = context.getProgram(fragment, vertex);\n\n // get the locations\n let locations;\n if (!this.defaultLocations_) {\n locations = new Locations(gl, program);\n this.defaultLocations_ = locations;\n } else {\n locations = this.defaultLocations_;\n }\n\n context.useProgram(program);\n\n // enable the vertex attrib arrays\n gl.enableVertexAttribArray(locations.a_position);\n gl.vertexAttribPointer(locations.a_position, 2, FLOAT,\n false, 16, 0);\n\n gl.enableVertexAttribArray(locations.a_instruction);\n gl.vertexAttribPointer(locations.a_instruction, 1, FLOAT,\n false, 16, 8);\n\n gl.enableVertexAttribArray(locations.a_radius);\n gl.vertexAttribPointer(locations.a_radius, 1, FLOAT,\n false, 16, 12);\n\n // Enable renderer specific uniforms.\n gl.uniform2fv(locations.u_size, size);\n gl.uniform1f(locations.u_pixelRatio, pixelRatio);\n\n return locations;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLCircleReplay.prototype.shutDownProgram = function(gl, locations) {\n gl.disableVertexAttribArray(locations.a_position);\n gl.disableVertexAttribArray(locations.a_instruction);\n gl.disableVertexAttribArray(locations.a_radius);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLCircleReplay.prototype.drawReplay = function(gl, context, skippedFeaturesHash, hitDetection) {\n if (!isEmpty(skippedFeaturesHash)) {\n this.drawReplaySkipping_(gl, context, skippedFeaturesHash);\n } else {\n //Draw by style groups to minimize drawElements() calls.\n let i, start, end, nextStyle;\n end = this.startIndices[this.startIndices.length - 1];\n for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n start = this.styleIndices_[i];\n nextStyle = this.styles_[i];\n this.setFillStyle_(gl, /** @type {Array.<number>} */ (nextStyle[0]));\n this.setStrokeStyle_(gl, /** @type {Array.<number>} */ (nextStyle[1]),\n /** @type {number} */ (nextStyle[2]));\n this.drawElements(gl, context, start, end);\n end = start;\n }\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLCircleReplay.prototype.drawHitDetectionReplayOneByOne = function(gl, context, skippedFeaturesHash,\n featureCallback, opt_hitExtent) {\n let i, start, end, nextStyle, groupStart, feature, featureUid, featureIndex;\n featureIndex = this.startIndices.length - 2;\n end = this.startIndices[featureIndex + 1];\n for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n nextStyle = this.styles_[i];\n this.setFillStyle_(gl, /** @type {Array.<number>} */ (nextStyle[0]));\n this.setStrokeStyle_(gl, /** @type {Array.<number>} */ (nextStyle[1]),\n /** @type {number} */ (nextStyle[2]));\n groupStart = this.styleIndices_[i];\n\n while (featureIndex >= 0 &&\n this.startIndices[featureIndex] >= groupStart) {\n start = this.startIndices[featureIndex];\n feature = this.startIndicesFeature[featureIndex];\n featureUid = getUid(feature).toString();\n\n if (skippedFeaturesHash[featureUid] === undefined &&\n feature.getGeometry() &&\n (opt_hitExtent === undefined || intersects(\n /** @type {Array<number>} */ (opt_hitExtent),\n feature.getGeometry().getExtent()))) {\n gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n this.drawElements(gl, context, start, end);\n\n const result = featureCallback(feature);\n\n if (result) {\n return result;\n }\n\n }\n featureIndex--;\n end = start;\n }\n }\n return undefined;\n};\n\n\n/**\n * @private\n * @param {WebGLRenderingContext} gl gl.\n * @param {module:ol/webgl/Context} context Context.\n * @param {Object} skippedFeaturesHash Ids of features to skip.\n */\nWebGLCircleReplay.prototype.drawReplaySkipping_ = function(gl, context, skippedFeaturesHash) {\n let i, start, end, nextStyle, groupStart, feature, featureUid, featureIndex, featureStart;\n featureIndex = this.startIndices.length - 2;\n end = start = this.startIndices[featureIndex + 1];\n for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n nextStyle = this.styles_[i];\n this.setFillStyle_(gl, /** @type {Array.<number>} */ (nextStyle[0]));\n this.setStrokeStyle_(gl, /** @type {Array.<number>} */ (nextStyle[1]),\n /** @type {number} */ (nextStyle[2]));\n groupStart = this.styleIndices_[i];\n\n while (featureIndex >= 0 &&\n this.startIndices[featureIndex] >= groupStart) {\n featureStart = this.startIndices[featureIndex];\n feature = this.startIndicesFeature[featureIndex];\n featureUid = getUid(feature).toString();\n\n if (skippedFeaturesHash[featureUid]) {\n if (start !== end) {\n this.drawElements(gl, context, start, end);\n }\n end = featureStart;\n }\n featureIndex--;\n start = featureStart;\n }\n if (start !== end) {\n this.drawElements(gl, context, start, end);\n }\n start = end = groupStart;\n }\n};\n\n\n/**\n * @private\n * @param {WebGLRenderingContext} gl gl.\n * @param {Array.<number>} color Color.\n */\nWebGLCircleReplay.prototype.setFillStyle_ = function(gl, color) {\n gl.uniform4fv(this.defaultLocations_.u_fillColor, color);\n};\n\n\n/**\n * @private\n * @param {WebGLRenderingContext} gl gl.\n * @param {Array.<number>} color Color.\n * @param {number} lineWidth Line width.\n */\nWebGLCircleReplay.prototype.setStrokeStyle_ = function(gl, color, lineWidth) {\n gl.uniform4fv(this.defaultLocations_.u_strokeColor, color);\n gl.uniform1f(this.defaultLocations_.u_lineWidth, lineWidth);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLCircleReplay.prototype.setFillStrokeStyle = function(fillStyle, strokeStyle) {\n let strokeStyleColor, strokeStyleWidth;\n if (strokeStyle) {\n const strokeStyleLineDash = strokeStyle.getLineDash();\n this.state_.lineDash = strokeStyleLineDash ?\n strokeStyleLineDash : DEFAULT_LINEDASH;\n const strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n this.state_.lineDashOffset = strokeStyleLineDashOffset ?\n strokeStyleLineDashOffset : DEFAULT_LINEDASHOFFSET;\n strokeStyleColor = strokeStyle.getColor();\n if (!(strokeStyleColor instanceof CanvasGradient) &&\n !(strokeStyleColor instanceof CanvasPattern)) {\n strokeStyleColor = asArray(strokeStyleColor).map(function(c, i) {\n return i != 3 ? c / 255 : c;\n }) || DEFAULT_STROKESTYLE;\n } else {\n strokeStyleColor = DEFAULT_STROKESTYLE;\n }\n strokeStyleWidth = strokeStyle.getWidth();\n strokeStyleWidth = strokeStyleWidth !== undefined ?\n strokeStyleWidth : DEFAULT_LINEWIDTH;\n } else {\n strokeStyleColor = [0, 0, 0, 0];\n strokeStyleWidth = 0;\n }\n let fillStyleColor = fillStyle ? fillStyle.getColor() : [0, 0, 0, 0];\n if (!(fillStyleColor instanceof CanvasGradient) &&\n !(fillStyleColor instanceof CanvasPattern)) {\n fillStyleColor = asArray(fillStyleColor).map(function(c, i) {\n return i != 3 ? c / 255 : c;\n }) || DEFAULT_FILLSTYLE;\n } else {\n fillStyleColor = DEFAULT_FILLSTYLE;\n }\n if (!this.state_.strokeColor || !equals(this.state_.strokeColor, strokeStyleColor) ||\n !this.state_.fillColor || !equals(this.state_.fillColor, fillStyleColor) ||\n this.state_.lineWidth !== strokeStyleWidth) {\n this.state_.changed = true;\n this.state_.fillColor = fillStyleColor;\n this.state_.strokeColor = strokeStyleColor;\n this.state_.lineWidth = strokeStyleWidth;\n this.styles_.push([fillStyleColor, strokeStyleColor, strokeStyleWidth]);\n }\n};\nexport default WebGLCircleReplay;\n","/**\n * @module ol/render/webgl/texturereplay/defaultshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\nimport WebGLFragment from '../../../webgl/Fragment.js';\nimport WebGLVertex from '../../../webgl/Vertex.js';\n\nexport const fragment = new WebGLFragment(DEBUG_WEBGL ?\n 'precision mediump float;\\nvarying vec2 v_texCoord;\\nvarying float v_opacity;\\n\\nuniform float u_opacity;\\nuniform sampler2D u_image;\\n\\nvoid main(void) {\\n vec4 texColor = texture2D(u_image, v_texCoord);\\n gl_FragColor.rgb = texColor.rgb;\\n float alpha = texColor.a * v_opacity * u_opacity;\\n if (alpha == 0.0) {\\n discard;\\n }\\n gl_FragColor.a = alpha;\\n}\\n' :\n 'precision mediump float;varying vec2 a;varying float b;uniform float k;uniform sampler2D l;void main(void){vec4 texColor=texture2D(l,a);gl_FragColor.rgb=texColor.rgb;float alpha=texColor.a*b*k;if(alpha==0.0){discard;}gl_FragColor.a=alpha;}');\n\nexport const vertex = new WebGLVertex(DEBUG_WEBGL ?\n 'varying vec2 v_texCoord;\\nvarying float v_opacity;\\n\\nattribute vec2 a_position;\\nattribute vec2 a_texCoord;\\nattribute vec2 a_offsets;\\nattribute float a_opacity;\\nattribute float a_rotateWithView;\\n\\nuniform mat4 u_projectionMatrix;\\nuniform mat4 u_offsetScaleMatrix;\\nuniform mat4 u_offsetRotateMatrix;\\n\\nvoid main(void) {\\n mat4 offsetMatrix = u_offsetScaleMatrix;\\n if (a_rotateWithView == 1.0) {\\n offsetMatrix = u_offsetScaleMatrix * u_offsetRotateMatrix;\\n }\\n vec4 offsets = offsetMatrix * vec4(a_offsets, 0.0, 0.0);\\n gl_Position = u_projectionMatrix * vec4(a_position, 0.0, 1.0) + offsets;\\n v_texCoord = a_texCoord;\\n v_opacity = a_opacity;\\n}\\n\\n\\n' :\n 'varying vec2 a;varying float b;attribute vec2 c;attribute vec2 d;attribute vec2 e;attribute float f;attribute float g;uniform mat4 h;uniform mat4 i;uniform mat4 j;void main(void){mat4 offsetMatrix=i;if(g==1.0){offsetMatrix=i*j;}vec4 offsets=offsetMatrix*vec4(e,0.0,0.0);gl_Position=h*vec4(c,0.0,1.0)+offsets;a=d;b=f;}');\n","/**\n * @module ol/render/webgl/texturereplay/defaultshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../../webgl.js';\n\n/**\n * @constructor\n * @param {WebGLRenderingContext} gl GL.\n * @param {WebGLProgram} program Program.\n * @struct\n */\nconst Locations = function(gl, program) {\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_projectionMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'h');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_offsetScaleMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_offsetScaleMatrix' : 'i');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_offsetRotateMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_offsetRotateMatrix' : 'j');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_opacity = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_opacity' : 'k');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_image = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_image' : 'l');\n\n /**\n * @type {number}\n */\n this.a_position = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_position' : 'c');\n\n /**\n * @type {number}\n */\n this.a_texCoord = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_texCoord' : 'd');\n\n /**\n * @type {number}\n */\n this.a_offsets = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_offsets' : 'e');\n\n /**\n * @type {number}\n */\n this.a_opacity = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_opacity' : 'f');\n\n /**\n * @type {number}\n */\n this.a_rotateWithView = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_rotateWithView' : 'g');\n};\n\nexport default Locations;\n","/**\n * @module ol/webgl/ContextEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n LOST: 'webglcontextlost',\n RESTORED: 'webglcontextrestored'\n};\n","/**\n * @module ol/webgl/Context\n */\nimport {getUid, inherits} from '../util.js';\nimport {EXTENSIONS as WEBGL_EXTENSIONS} from '../webgl.js';\nimport Disposable from '../Disposable.js';\nimport {includes} from '../array.js';\nimport {listen, unlistenAll} from '../events.js';\nimport {clear} from '../obj.js';\nimport {ARRAY_BUFFER, ELEMENT_ARRAY_BUFFER, TEXTURE_2D, TEXTURE_WRAP_S, TEXTURE_WRAP_T} from '../webgl.js';\nimport ContextEventType from '../webgl/ContextEventType.js';\n\n\n/**\n * @typedef {Object} BufferCacheEntry\n * @property {module:ol/webgl/Buffer} buf\n * @property {WebGLBuffer} buffer\n */\n\n\n/**\n * @classdesc\n * A WebGL context for accessing low-level WebGL capabilities.\n *\n * @constructor\n * @extends {module:ol/Disposable}\n * @param {HTMLCanvasElement} canvas Canvas.\n * @param {WebGLRenderingContext} gl GL.\n */\nconst WebGLContext = function(canvas, gl) {\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = canvas;\n\n /**\n * @private\n * @type {WebGLRenderingContext}\n */\n this.gl_ = gl;\n\n /**\n * @private\n * @type {!Object.<string, module:ol/webgl/Context~BufferCacheEntry>}\n */\n this.bufferCache_ = {};\n\n /**\n * @private\n * @type {!Object.<string, WebGLShader>}\n */\n this.shaderCache_ = {};\n\n /**\n * @private\n * @type {!Object.<string, WebGLProgram>}\n */\n this.programCache_ = {};\n\n /**\n * @private\n * @type {WebGLProgram}\n */\n this.currentProgram_ = null;\n\n /**\n * @private\n * @type {WebGLFramebuffer}\n */\n this.hitDetectionFramebuffer_ = null;\n\n /**\n * @private\n * @type {WebGLTexture}\n */\n this.hitDetectionTexture_ = null;\n\n /**\n * @private\n * @type {WebGLRenderbuffer}\n */\n this.hitDetectionRenderbuffer_ = null;\n\n /**\n * @type {boolean}\n */\n this.hasOESElementIndexUint = includes(WEBGL_EXTENSIONS, 'OES_element_index_uint');\n\n // use the OES_element_index_uint extension if available\n if (this.hasOESElementIndexUint) {\n gl.getExtension('OES_element_index_uint');\n }\n\n listen(this.canvas_, ContextEventType.LOST,\n this.handleWebGLContextLost, this);\n listen(this.canvas_, ContextEventType.RESTORED,\n this.handleWebGLContextRestored, this);\n\n};\n\ninherits(WebGLContext, Disposable);\n\n\n/**\n * Just bind the buffer if it's in the cache. Otherwise create\n * the WebGL buffer, bind it, populate it, and add an entry to\n * the cache.\n * @param {number} target Target.\n * @param {module:ol/webgl/Buffer} buf Buffer.\n */\nWebGLContext.prototype.bindBuffer = function(target, buf) {\n const gl = this.getGL();\n const arr = buf.getArray();\n const bufferKey = String(getUid(buf));\n if (bufferKey in this.bufferCache_) {\n const bufferCacheEntry = this.bufferCache_[bufferKey];\n gl.bindBuffer(target, bufferCacheEntry.buffer);\n } else {\n const buffer = gl.createBuffer();\n gl.bindBuffer(target, buffer);\n let /** @type {ArrayBufferView} */ arrayBuffer;\n if (target == ARRAY_BUFFER) {\n arrayBuffer = new Float32Array(arr);\n } else if (target == ELEMENT_ARRAY_BUFFER) {\n arrayBuffer = this.hasOESElementIndexUint ?\n new Uint32Array(arr) : new Uint16Array(arr);\n }\n gl.bufferData(target, arrayBuffer, buf.getUsage());\n this.bufferCache_[bufferKey] = {\n buf: buf,\n buffer: buffer\n };\n }\n};\n\n\n/**\n * @param {module:ol/webgl/Buffer} buf Buffer.\n */\nWebGLContext.prototype.deleteBuffer = function(buf) {\n const gl = this.getGL();\n const bufferKey = String(getUid(buf));\n const bufferCacheEntry = this.bufferCache_[bufferKey];\n if (!gl.isContextLost()) {\n gl.deleteBuffer(bufferCacheEntry.buffer);\n }\n delete this.bufferCache_[bufferKey];\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLContext.prototype.disposeInternal = function() {\n unlistenAll(this.canvas_);\n const gl = this.getGL();\n if (!gl.isContextLost()) {\n for (const key in this.bufferCache_) {\n gl.deleteBuffer(this.bufferCache_[key].buffer);\n }\n for (const key in this.programCache_) {\n gl.deleteProgram(this.programCache_[key]);\n }\n for (const key in this.shaderCache_) {\n gl.deleteShader(this.shaderCache_[key]);\n }\n // delete objects for hit-detection\n gl.deleteFramebuffer(this.hitDetectionFramebuffer_);\n gl.deleteRenderbuffer(this.hitDetectionRenderbuffer_);\n gl.deleteTexture(this.hitDetectionTexture_);\n }\n};\n\n\n/**\n * @return {HTMLCanvasElement} Canvas.\n */\nWebGLContext.prototype.getCanvas = function() {\n return this.canvas_;\n};\n\n\n/**\n * Get the WebGL rendering context\n * @return {WebGLRenderingContext} The rendering context.\n * @api\n */\nWebGLContext.prototype.getGL = function() {\n return this.gl_;\n};\n\n\n/**\n * Get the frame buffer for hit detection.\n * @return {WebGLFramebuffer} The hit detection frame buffer.\n */\nWebGLContext.prototype.getHitDetectionFramebuffer = function() {\n if (!this.hitDetectionFramebuffer_) {\n this.initHitDetectionFramebuffer_();\n }\n return this.hitDetectionFramebuffer_;\n};\n\n\n/**\n * Get shader from the cache if it's in the cache. Otherwise, create\n * the WebGL shader, compile it, and add entry to cache.\n * @param {module:ol/webgl/Shader} shaderObject Shader object.\n * @return {WebGLShader} Shader.\n */\nWebGLContext.prototype.getShader = function(shaderObject) {\n const shaderKey = String(getUid(shaderObject));\n if (shaderKey in this.shaderCache_) {\n return this.shaderCache_[shaderKey];\n } else {\n const gl = this.getGL();\n const shader = gl.createShader(shaderObject.getType());\n gl.shaderSource(shader, shaderObject.getSource());\n gl.compileShader(shader);\n this.shaderCache_[shaderKey] = shader;\n return shader;\n }\n};\n\n\n/**\n * Get the program from the cache if it's in the cache. Otherwise create\n * the WebGL program, attach the shaders to it, and add an entry to the\n * cache.\n * @param {module:ol/webgl/Fragment} fragmentShaderObject Fragment shader.\n * @param {module:ol/webgl/Vertex} vertexShaderObject Vertex shader.\n * @return {WebGLProgram} Program.\n */\nWebGLContext.prototype.getProgram = function(fragmentShaderObject, vertexShaderObject) {\n const programKey = getUid(fragmentShaderObject) + '/' + getUid(vertexShaderObject);\n if (programKey in this.programCache_) {\n return this.programCache_[programKey];\n } else {\n const gl = this.getGL();\n const program = gl.createProgram();\n gl.attachShader(program, this.getShader(fragmentShaderObject));\n gl.attachShader(program, this.getShader(vertexShaderObject));\n gl.linkProgram(program);\n this.programCache_[programKey] = program;\n return program;\n }\n};\n\n\n/**\n * FIXME empty description for jsdoc\n */\nWebGLContext.prototype.handleWebGLContextLost = function() {\n clear(this.bufferCache_);\n clear(this.shaderCache_);\n clear(this.programCache_);\n this.currentProgram_ = null;\n this.hitDetectionFramebuffer_ = null;\n this.hitDetectionTexture_ = null;\n this.hitDetectionRenderbuffer_ = null;\n};\n\n\n/**\n * FIXME empty description for jsdoc\n */\nWebGLContext.prototype.handleWebGLContextRestored = function() {\n};\n\n\n/**\n * Creates a 1x1 pixel framebuffer for the hit-detection.\n * @private\n */\nWebGLContext.prototype.initHitDetectionFramebuffer_ = function() {\n const gl = this.gl_;\n const framebuffer = gl.createFramebuffer();\n gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer);\n\n const texture = createEmptyTexture(gl, 1, 1);\n const renderbuffer = gl.createRenderbuffer();\n gl.bindRenderbuffer(gl.RENDERBUFFER, renderbuffer);\n gl.renderbufferStorage(gl.RENDERBUFFER, gl.DEPTH_COMPONENT16, 1, 1);\n gl.framebufferTexture2D(\n gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D, texture, 0);\n gl.framebufferRenderbuffer(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT,\n gl.RENDERBUFFER, renderbuffer);\n\n gl.bindTexture(gl.TEXTURE_2D, null);\n gl.bindRenderbuffer(gl.RENDERBUFFER, null);\n gl.bindFramebuffer(gl.FRAMEBUFFER, null);\n\n this.hitDetectionFramebuffer_ = framebuffer;\n this.hitDetectionTexture_ = texture;\n this.hitDetectionRenderbuffer_ = renderbuffer;\n};\n\n\n/**\n * Use a program. If the program is already in use, this will return `false`.\n * @param {WebGLProgram} program Program.\n * @return {boolean} Changed.\n * @api\n */\nWebGLContext.prototype.useProgram = function(program) {\n if (program == this.currentProgram_) {\n return false;\n } else {\n const gl = this.getGL();\n gl.useProgram(program);\n this.currentProgram_ = program;\n return true;\n }\n};\n\n\n/**\n * @param {WebGLRenderingContext} gl WebGL rendering context.\n * @param {number=} opt_wrapS wrapS.\n * @param {number=} opt_wrapT wrapT.\n * @return {WebGLTexture} The texture.\n */\nfunction createTextureInternal(gl, opt_wrapS, opt_wrapT) {\n const texture = gl.createTexture();\n gl.bindTexture(gl.TEXTURE_2D, texture);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR);\n gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR);\n\n if (opt_wrapS !== undefined) {\n gl.texParameteri(\n TEXTURE_2D, TEXTURE_WRAP_S, opt_wrapS);\n }\n if (opt_wrapT !== undefined) {\n gl.texParameteri(\n TEXTURE_2D, TEXTURE_WRAP_T, opt_wrapT);\n }\n\n return texture;\n}\n\n\n/**\n * @param {WebGLRenderingContext} gl WebGL rendering context.\n * @param {number} width Width.\n * @param {number} height Height.\n * @param {number=} opt_wrapS wrapS.\n * @param {number=} opt_wrapT wrapT.\n * @return {WebGLTexture} The texture.\n */\nexport function createEmptyTexture(gl, width, height, opt_wrapS, opt_wrapT) {\n const texture = createTextureInternal(gl, opt_wrapS, opt_wrapT);\n gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, width, height, 0, gl.RGBA, gl.UNSIGNED_BYTE, null);\n return texture;\n}\n\n\n/**\n * @param {WebGLRenderingContext} gl WebGL rendering context.\n * @param {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} image Image.\n * @param {number=} opt_wrapS wrapS.\n * @param {number=} opt_wrapT wrapT.\n * @return {WebGLTexture} The texture.\n */\nexport function createTexture(gl, image, opt_wrapS, opt_wrapT) {\n const texture = createTextureInternal(gl, opt_wrapS, opt_wrapT);\n gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image);\n return texture;\n}\n\nexport default WebGLContext;\n","/**\n * @module ol/render/webgl/TextureReplay\n */\nimport {getUid, inherits} from '../../util.js';\nimport {intersects} from '../../extent.js';\nimport {isEmpty} from '../../obj.js';\nimport {fragment, vertex} from '../webgl/texturereplay/defaultshader.js';\nimport Locations from '../webgl/texturereplay/defaultshader/Locations.js';\nimport WebGLReplay from '../webgl/Replay.js';\nimport {CLAMP_TO_EDGE, FLOAT, TEXTURE_2D} from '../../webgl.js';\nimport {createTexture} from '../../webgl/Context.js';\n\n/**\n * @constructor\n * @abstract\n * @extends {module:ol/render/webgl/Replay}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Max extent.\n * @struct\n */\nconst WebGLTextureReplay = function(tolerance, maxExtent) {\n WebGLReplay.call(this, tolerance, maxExtent);\n\n /**\n * @type {number|undefined}\n * @protected\n */\n this.anchorX = undefined;\n\n /**\n * @type {number|undefined}\n * @protected\n */\n this.anchorY = undefined;\n\n /**\n * @type {Array.<number>}\n * @protected\n */\n this.groupIndices = [];\n\n /**\n * @type {Array.<number>}\n * @protected\n */\n this.hitDetectionGroupIndices = [];\n\n /**\n * @type {number|undefined}\n * @protected\n */\n this.height = undefined;\n\n /**\n * @type {number|undefined}\n * @protected\n */\n this.imageHeight = undefined;\n\n /**\n * @type {number|undefined}\n * @protected\n */\n this.imageWidth = undefined;\n\n /**\n * @protected\n * @type {module:ol/render/webgl/texturereplay/defaultshader/Locations}\n */\n this.defaultLocations = null;\n\n /**\n * @protected\n * @type {number|undefined}\n */\n this.opacity = undefined;\n\n /**\n * @type {number|undefined}\n * @protected\n */\n this.originX = undefined;\n\n /**\n * @type {number|undefined}\n * @protected\n */\n this.originY = undefined;\n\n /**\n * @protected\n * @type {boolean|undefined}\n */\n this.rotateWithView = undefined;\n\n /**\n * @protected\n * @type {number|undefined}\n */\n this.rotation = undefined;\n\n /**\n * @protected\n * @type {number|undefined}\n */\n this.scale = undefined;\n\n /**\n * @type {number|undefined}\n * @protected\n */\n this.width = undefined;\n};\n\ninherits(WebGLTextureReplay, WebGLReplay);\n\n\n/**\n * @inheritDoc\n */\nWebGLTextureReplay.prototype.getDeleteResourcesFunction = function(context) {\n const verticesBuffer = this.verticesBuffer;\n const indicesBuffer = this.indicesBuffer;\n const textures = this.getTextures(true);\n const gl = context.getGL();\n return function() {\n if (!gl.isContextLost()) {\n let i, ii;\n for (i = 0, ii = textures.length; i < ii; ++i) {\n gl.deleteTexture(textures[i]);\n }\n }\n context.deleteBuffer(verticesBuffer);\n context.deleteBuffer(indicesBuffer);\n };\n};\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {number} My end.\n * @protected\n */\nWebGLTextureReplay.prototype.drawCoordinates = function(flatCoordinates, offset, end, stride) {\n const anchorX = /** @type {number} */ (this.anchorX);\n const anchorY = /** @type {number} */ (this.anchorY);\n const height = /** @type {number} */ (this.height);\n const imageHeight = /** @type {number} */ (this.imageHeight);\n const imageWidth = /** @type {number} */ (this.imageWidth);\n const opacity = /** @type {number} */ (this.opacity);\n const originX = /** @type {number} */ (this.originX);\n const originY = /** @type {number} */ (this.originY);\n const rotateWithView = this.rotateWithView ? 1.0 : 0.0;\n // this.rotation_ is anti-clockwise, but rotation is clockwise\n const rotation = /** @type {number} */ (-this.rotation);\n const scale = /** @type {number} */ (this.scale);\n const width = /** @type {number} */ (this.width);\n const cos = Math.cos(rotation);\n const sin = Math.sin(rotation);\n let numIndices = this.indices.length;\n let numVertices = this.vertices.length;\n let i, n, offsetX, offsetY, x, y;\n for (i = offset; i < end; i += stride) {\n x = flatCoordinates[i] - this.origin[0];\n y = flatCoordinates[i + 1] - this.origin[1];\n\n // There are 4 vertices per [x, y] point, one for each corner of the\n // rectangle we're going to draw. We'd use 1 vertex per [x, y] point if\n // WebGL supported Geometry Shaders (which can emit new vertices), but that\n // is not currently the case.\n //\n // And each vertex includes 8 values: the x and y coordinates, the x and\n // y offsets used to calculate the position of the corner, the u and\n // v texture coordinates for the corner, the opacity, and whether the\n // the image should be rotated with the view (rotateWithView).\n\n n = numVertices / 8;\n\n // bottom-left corner\n offsetX = -scale * anchorX;\n offsetY = -scale * (height - anchorY);\n this.vertices[numVertices++] = x;\n this.vertices[numVertices++] = y;\n this.vertices[numVertices++] = offsetX * cos - offsetY * sin;\n this.vertices[numVertices++] = offsetX * sin + offsetY * cos;\n this.vertices[numVertices++] = originX / imageWidth;\n this.vertices[numVertices++] = (originY + height) / imageHeight;\n this.vertices[numVertices++] = opacity;\n this.vertices[numVertices++] = rotateWithView;\n\n // bottom-right corner\n offsetX = scale * (width - anchorX);\n offsetY = -scale * (height - anchorY);\n this.vertices[numVertices++] = x;\n this.vertices[numVertices++] = y;\n this.vertices[numVertices++] = offsetX * cos - offsetY * sin;\n this.vertices[numVertices++] = offsetX * sin + offsetY * cos;\n this.vertices[numVertices++] = (originX + width) / imageWidth;\n this.vertices[numVertices++] = (originY + height) / imageHeight;\n this.vertices[numVertices++] = opacity;\n this.vertices[numVertices++] = rotateWithView;\n\n // top-right corner\n offsetX = scale * (width - anchorX);\n offsetY = scale * anchorY;\n this.vertices[numVertices++] = x;\n this.vertices[numVertices++] = y;\n this.vertices[numVertices++] = offsetX * cos - offsetY * sin;\n this.vertices[numVertices++] = offsetX * sin + offsetY * cos;\n this.vertices[numVertices++] = (originX + width) / imageWidth;\n this.vertices[numVertices++] = originY / imageHeight;\n this.vertices[numVertices++] = opacity;\n this.vertices[numVertices++] = rotateWithView;\n\n // top-left corner\n offsetX = -scale * anchorX;\n offsetY = scale * anchorY;\n this.vertices[numVertices++] = x;\n this.vertices[numVertices++] = y;\n this.vertices[numVertices++] = offsetX * cos - offsetY * sin;\n this.vertices[numVertices++] = offsetX * sin + offsetY * cos;\n this.vertices[numVertices++] = originX / imageWidth;\n this.vertices[numVertices++] = originY / imageHeight;\n this.vertices[numVertices++] = opacity;\n this.vertices[numVertices++] = rotateWithView;\n\n this.indices[numIndices++] = n;\n this.indices[numIndices++] = n + 1;\n this.indices[numIndices++] = n + 2;\n this.indices[numIndices++] = n;\n this.indices[numIndices++] = n + 2;\n this.indices[numIndices++] = n + 3;\n }\n\n return numVertices;\n};\n\n\n/**\n * @protected\n * @param {Array.<WebGLTexture>} textures Textures.\n * @param {Array.<HTMLCanvasElement|HTMLImageElement|HTMLVideoElement>} images Images.\n * @param {!Object.<string, WebGLTexture>} texturePerImage Texture cache.\n * @param {WebGLRenderingContext} gl Gl.\n */\nWebGLTextureReplay.prototype.createTextures = function(textures, images, texturePerImage, gl) {\n let texture, image, uid, i;\n const ii = images.length;\n for (i = 0; i < ii; ++i) {\n image = images[i];\n\n uid = getUid(image).toString();\n if (uid in texturePerImage) {\n texture = texturePerImage[uid];\n } else {\n texture = createTexture(\n gl, image, CLAMP_TO_EDGE, CLAMP_TO_EDGE);\n texturePerImage[uid] = texture;\n }\n textures[i] = texture;\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTextureReplay.prototype.setUpProgram = function(gl, context, size, pixelRatio) {\n // get the program\n const program = context.getProgram(fragment, vertex);\n\n // get the locations\n let locations;\n if (!this.defaultLocations) {\n locations = new Locations(gl, program);\n this.defaultLocations = locations;\n } else {\n locations = this.defaultLocations;\n }\n\n // use the program (FIXME: use the return value)\n context.useProgram(program);\n\n // enable the vertex attrib arrays\n gl.enableVertexAttribArray(locations.a_position);\n gl.vertexAttribPointer(locations.a_position, 2, FLOAT,\n false, 32, 0);\n\n gl.enableVertexAttribArray(locations.a_offsets);\n gl.vertexAttribPointer(locations.a_offsets, 2, FLOAT,\n false, 32, 8);\n\n gl.enableVertexAttribArray(locations.a_texCoord);\n gl.vertexAttribPointer(locations.a_texCoord, 2, FLOAT,\n false, 32, 16);\n\n gl.enableVertexAttribArray(locations.a_opacity);\n gl.vertexAttribPointer(locations.a_opacity, 1, FLOAT,\n false, 32, 24);\n\n gl.enableVertexAttribArray(locations.a_rotateWithView);\n gl.vertexAttribPointer(locations.a_rotateWithView, 1, FLOAT,\n false, 32, 28);\n\n return locations;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTextureReplay.prototype.shutDownProgram = function(gl, locations) {\n gl.disableVertexAttribArray(locations.a_position);\n gl.disableVertexAttribArray(locations.a_offsets);\n gl.disableVertexAttribArray(locations.a_texCoord);\n gl.disableVertexAttribArray(locations.a_opacity);\n gl.disableVertexAttribArray(locations.a_rotateWithView);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTextureReplay.prototype.drawReplay = function(gl, context, skippedFeaturesHash, hitDetection) {\n const textures = hitDetection ? this.getHitDetectionTextures() : this.getTextures();\n const groupIndices = hitDetection ? this.hitDetectionGroupIndices : this.groupIndices;\n\n if (!isEmpty(skippedFeaturesHash)) {\n this.drawReplaySkipping(gl, context, skippedFeaturesHash, textures, groupIndices);\n } else {\n let i, ii, start;\n for (i = 0, ii = textures.length, start = 0; i < ii; ++i) {\n gl.bindTexture(TEXTURE_2D, textures[i]);\n const end = groupIndices[i];\n this.drawElements(gl, context, start, end);\n start = end;\n }\n }\n};\n\n\n/**\n * Draw the replay while paying attention to skipped features.\n *\n * This functions creates groups of features that can be drawn to together,\n * so that the number of `drawElements` calls is minimized.\n *\n * For example given the following texture groups:\n *\n * Group 1: A B C\n * Group 2: D [E] F G\n *\n * If feature E should be skipped, the following `drawElements` calls will be\n * made:\n *\n * drawElements with feature A, B and C\n * drawElements with feature D\n * drawElements with feature F and G\n *\n * @protected\n * @param {WebGLRenderingContext} gl gl.\n * @param {module:ol/webgl/Context} context Context.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features\n * to skip.\n * @param {Array.<WebGLTexture>} textures Textures.\n * @param {Array.<number>} groupIndices Texture group indices.\n */\nWebGLTextureReplay.prototype.drawReplaySkipping = function(gl, context, skippedFeaturesHash, textures,\n groupIndices) {\n let featureIndex = 0;\n\n let i, ii;\n for (i = 0, ii = textures.length; i < ii; ++i) {\n gl.bindTexture(TEXTURE_2D, textures[i]);\n const groupStart = (i > 0) ? groupIndices[i - 1] : 0;\n const groupEnd = groupIndices[i];\n\n let start = groupStart;\n let end = groupStart;\n while (featureIndex < this.startIndices.length &&\n this.startIndices[featureIndex] <= groupEnd) {\n const feature = this.startIndicesFeature[featureIndex];\n\n const featureUid = getUid(feature).toString();\n if (skippedFeaturesHash[featureUid] !== undefined) {\n // feature should be skipped\n if (start !== end) {\n // draw the features so far\n this.drawElements(gl, context, start, end);\n }\n // continue with the next feature\n start = (featureIndex === this.startIndices.length - 1) ?\n groupEnd : this.startIndices[featureIndex + 1];\n end = start;\n } else {\n // the feature is not skipped, augment the end index\n end = (featureIndex === this.startIndices.length - 1) ?\n groupEnd : this.startIndices[featureIndex + 1];\n }\n featureIndex++;\n }\n\n if (start !== end) {\n // draw the remaining features (in case there was no skipped feature\n // in this texture group, all features of a group are drawn together)\n this.drawElements(gl, context, start, end);\n }\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTextureReplay.prototype.drawHitDetectionReplayOneByOne = function(gl, context, skippedFeaturesHash,\n featureCallback, opt_hitExtent) {\n let i, groupStart, start, end, feature, featureUid;\n let featureIndex = this.startIndices.length - 1;\n const hitDetectionTextures = this.getHitDetectionTextures();\n for (i = hitDetectionTextures.length - 1; i >= 0; --i) {\n gl.bindTexture(TEXTURE_2D, hitDetectionTextures[i]);\n groupStart = (i > 0) ? this.hitDetectionGroupIndices[i - 1] : 0;\n end = this.hitDetectionGroupIndices[i];\n\n // draw all features for this texture group\n while (featureIndex >= 0 &&\n this.startIndices[featureIndex] >= groupStart) {\n start = this.startIndices[featureIndex];\n feature = this.startIndicesFeature[featureIndex];\n featureUid = getUid(feature).toString();\n\n if (skippedFeaturesHash[featureUid] === undefined &&\n feature.getGeometry() &&\n (opt_hitExtent === undefined || intersects(\n /** @type {Array<number>} */ (opt_hitExtent),\n feature.getGeometry().getExtent()))) {\n gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n this.drawElements(gl, context, start, end);\n\n const result = featureCallback(feature);\n if (result) {\n return result;\n }\n }\n\n end = start;\n featureIndex--;\n }\n }\n return undefined;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTextureReplay.prototype.finish = function(context) {\n this.anchorX = undefined;\n this.anchorY = undefined;\n this.height = undefined;\n this.imageHeight = undefined;\n this.imageWidth = undefined;\n this.indices = null;\n this.opacity = undefined;\n this.originX = undefined;\n this.originY = undefined;\n this.rotateWithView = undefined;\n this.rotation = undefined;\n this.scale = undefined;\n this.vertices = null;\n this.width = undefined;\n};\n\n\n/**\n * @abstract\n * @protected\n * @param {boolean=} opt_all Return hit detection textures with regular ones.\n * @returns {Array.<WebGLTexture>} Textures.\n */\nWebGLTextureReplay.prototype.getTextures = function(opt_all) {};\n\n\n/**\n * @abstract\n * @protected\n * @returns {Array.<WebGLTexture>} Textures.\n */\nWebGLTextureReplay.prototype.getHitDetectionTextures = function() {};\nexport default WebGLTextureReplay;\n","/**\n * @module ol/render/webgl/ImageReplay\n */\nimport {getUid, inherits} from '../../util.js';\nimport WebGLTextureReplay from '../webgl/TextureReplay.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n/**\n * @constructor\n * @extends {module:ol/render/webgl/TextureReplay}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Max extent.\n * @struct\n */\nconst WebGLImageReplay = function(tolerance, maxExtent) {\n WebGLTextureReplay.call(this, tolerance, maxExtent);\n\n /**\n * @type {Array.<HTMLCanvasElement|HTMLImageElement|HTMLVideoElement>}\n * @protected\n */\n this.images_ = [];\n\n /**\n * @type {Array.<HTMLCanvasElement|HTMLImageElement|HTMLVideoElement>}\n * @protected\n */\n this.hitDetectionImages_ = [];\n\n /**\n * @type {Array.<WebGLTexture>}\n * @private\n */\n this.textures_ = [];\n\n /**\n * @type {Array.<WebGLTexture>}\n * @private\n */\n this.hitDetectionTextures_ = [];\n\n};\n\ninherits(WebGLImageReplay, WebGLTextureReplay);\n\n\n/**\n * @inheritDoc\n */\nWebGLImageReplay.prototype.drawMultiPoint = function(multiPointGeometry, feature) {\n this.startIndices.push(this.indices.length);\n this.startIndicesFeature.push(feature);\n const flatCoordinates = multiPointGeometry.getFlatCoordinates();\n const stride = multiPointGeometry.getStride();\n this.drawCoordinates(\n flatCoordinates, 0, flatCoordinates.length, stride);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImageReplay.prototype.drawPoint = function(pointGeometry, feature) {\n this.startIndices.push(this.indices.length);\n this.startIndicesFeature.push(feature);\n const flatCoordinates = pointGeometry.getFlatCoordinates();\n const stride = pointGeometry.getStride();\n this.drawCoordinates(\n flatCoordinates, 0, flatCoordinates.length, stride);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImageReplay.prototype.finish = function(context) {\n const gl = context.getGL();\n\n this.groupIndices.push(this.indices.length);\n this.hitDetectionGroupIndices.push(this.indices.length);\n\n // create, bind, and populate the vertices buffer\n this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n const indices = this.indices;\n\n // create, bind, and populate the indices buffer\n this.indicesBuffer = new WebGLBuffer(indices);\n\n // create textures\n /** @type {Object.<string, WebGLTexture>} */\n const texturePerImage = {};\n\n this.createTextures(this.textures_, this.images_, texturePerImage, gl);\n\n this.createTextures(this.hitDetectionTextures_, this.hitDetectionImages_,\n texturePerImage, gl);\n\n this.images_ = null;\n this.hitDetectionImages_ = null;\n WebGLTextureReplay.prototype.finish.call(this, context);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImageReplay.prototype.setImageStyle = function(imageStyle) {\n const anchor = imageStyle.getAnchor();\n const image = imageStyle.getImage(1);\n const imageSize = imageStyle.getImageSize();\n const hitDetectionImage = imageStyle.getHitDetectionImage(1);\n const opacity = imageStyle.getOpacity();\n const origin = imageStyle.getOrigin();\n const rotateWithView = imageStyle.getRotateWithView();\n const rotation = imageStyle.getRotation();\n const size = imageStyle.getSize();\n const scale = imageStyle.getScale();\n\n let currentImage;\n if (this.images_.length === 0) {\n this.images_.push(image);\n } else {\n currentImage = this.images_[this.images_.length - 1];\n if (getUid(currentImage) != getUid(image)) {\n this.groupIndices.push(this.indices.length);\n this.images_.push(image);\n }\n }\n\n if (this.hitDetectionImages_.length === 0) {\n this.hitDetectionImages_.push(hitDetectionImage);\n } else {\n currentImage =\n this.hitDetectionImages_[this.hitDetectionImages_.length - 1];\n if (getUid(currentImage) != getUid(hitDetectionImage)) {\n this.hitDetectionGroupIndices.push(this.indices.length);\n this.hitDetectionImages_.push(hitDetectionImage);\n }\n }\n\n this.anchorX = anchor[0];\n this.anchorY = anchor[1];\n this.height = size[1];\n this.imageHeight = imageSize[1];\n this.imageWidth = imageSize[0];\n this.opacity = opacity;\n this.originX = origin[0];\n this.originY = origin[1];\n this.rotation = rotation;\n this.rotateWithView = rotateWithView;\n this.scale = scale;\n this.width = size[0];\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImageReplay.prototype.getTextures = function(opt_all) {\n return opt_all ? this.textures_.concat(this.hitDetectionTextures_) : this.textures_;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImageReplay.prototype.getHitDetectionTextures = function() {\n return this.hitDetectionTextures_;\n};\nexport default WebGLImageReplay;\n","/**\n * @module ol/geom/flat/topology\n */\nimport {linearRing as linearRingArea} from '../flat/area.js';\n\n/**\n * Check if the linestring is a boundary.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {boolean} The linestring is a boundary.\n */\nexport function lineStringIsClosed(flatCoordinates, offset, end, stride) {\n const lastCoord = end - stride;\n if (flatCoordinates[offset] === flatCoordinates[lastCoord] &&\n flatCoordinates[offset + 1] === flatCoordinates[lastCoord + 1] && (end - offset) / stride > 3) {\n return !!linearRingArea(flatCoordinates, offset, end, stride);\n }\n return false;\n}\n","/**\n * @module ol/render/webgl/linestringreplay/defaultshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\nimport WebGLFragment from '../../../webgl/Fragment.js';\nimport WebGLVertex from '../../../webgl/Vertex.js';\n\nexport const fragment = new WebGLFragment(DEBUG_WEBGL ?\n 'precision mediump float;\\nvarying float v_round;\\nvarying vec2 v_roundVertex;\\nvarying float v_halfWidth;\\n\\n\\n\\nuniform float u_opacity;\\nuniform vec4 u_color;\\nuniform vec2 u_size;\\nuniform float u_pixelRatio;\\n\\nvoid main(void) {\\n if (v_round > 0.0) {\\n vec2 windowCoords = vec2((v_roundVertex.x + 1.0) / 2.0 * u_size.x * u_pixelRatio,\\n (v_roundVertex.y + 1.0) / 2.0 * u_size.y * u_pixelRatio);\\n if (length(windowCoords - gl_FragCoord.xy) > v_halfWidth * u_pixelRatio) {\\n discard;\\n }\\n }\\n gl_FragColor = u_color;\\n float alpha = u_color.a * u_opacity;\\n if (alpha == 0.0) {\\n discard;\\n }\\n gl_FragColor.a = alpha;\\n}\\n' :\n 'precision mediump float;varying float a;varying vec2 aVertex;varying float c;uniform float m;uniform vec4 n;uniform vec2 o;uniform float p;void main(void){if(a>0.0){vec2 windowCoords=vec2((aVertex.x+1.0)/2.0*o.x*p,(aVertex.y+1.0)/2.0*o.y*p);if(length(windowCoords-gl_FragCoord.xy)>c*p){discard;}} gl_FragColor=n;float alpha=n.a*m;if(alpha==0.0){discard;}gl_FragColor.a=alpha;}');\n\nexport const vertex = new WebGLVertex(DEBUG_WEBGL ?\n 'varying float v_round;\\nvarying vec2 v_roundVertex;\\nvarying float v_halfWidth;\\n\\n\\nattribute vec2 a_lastPos;\\nattribute vec2 a_position;\\nattribute vec2 a_nextPos;\\nattribute float a_direction;\\n\\nuniform mat4 u_projectionMatrix;\\nuniform mat4 u_offsetScaleMatrix;\\nuniform mat4 u_offsetRotateMatrix;\\nuniform float u_lineWidth;\\nuniform float u_miterLimit;\\n\\nbool nearlyEquals(in float value, in float ref) {\\n float epsilon = 0.000000000001;\\n return value >= ref - epsilon && value <= ref + epsilon;\\n}\\n\\nvoid alongNormal(out vec2 offset, in vec2 nextP, in float turnDir, in float direction) {\\n vec2 dirVect = nextP - a_position;\\n vec2 normal = normalize(vec2(-turnDir * dirVect.y, turnDir * dirVect.x));\\n offset = u_lineWidth / 2.0 * normal * direction;\\n}\\n\\nvoid miterUp(out vec2 offset, out float round, in bool isRound, in float direction) {\\n float halfWidth = u_lineWidth / 2.0;\\n vec2 tangent = normalize(normalize(a_nextPos - a_position) + normalize(a_position - a_lastPos));\\n vec2 normal = vec2(-tangent.y, tangent.x);\\n vec2 dirVect = a_nextPos - a_position;\\n vec2 tmpNormal = normalize(vec2(-dirVect.y, dirVect.x));\\n float miterLength = abs(halfWidth / dot(normal, tmpNormal));\\n offset = normal * direction * miterLength;\\n round = 0.0;\\n if (isRound) {\\n round = 1.0;\\n } else if (miterLength > u_miterLimit + u_lineWidth) {\\n offset = halfWidth * tmpNormal * direction;\\n }\\n}\\n\\nbool miterDown(out vec2 offset, in vec4 projPos, in mat4 offsetMatrix, in float direction) {\\n bool degenerate = false;\\n vec2 tangent = normalize(normalize(a_nextPos - a_position) + normalize(a_position - a_lastPos));\\n vec2 normal = vec2(-tangent.y, tangent.x);\\n vec2 dirVect = a_lastPos - a_position;\\n vec2 tmpNormal = normalize(vec2(-dirVect.y, dirVect.x));\\n vec2 longOffset, shortOffset, longVertex;\\n vec4 shortProjVertex;\\n float halfWidth = u_lineWidth / 2.0;\\n if (length(a_nextPos - a_position) > length(a_lastPos - a_position)) {\\n longOffset = tmpNormal * direction * halfWidth;\\n shortOffset = normalize(vec2(dirVect.y, -dirVect.x)) * direction * halfWidth;\\n longVertex = a_nextPos;\\n shortProjVertex = u_projectionMatrix * vec4(a_lastPos, 0.0, 1.0);\\n } else {\\n shortOffset = tmpNormal * direction * halfWidth;\\n longOffset = normalize(vec2(dirVect.y, -dirVect.x)) * direction * halfWidth;\\n longVertex = a_lastPos;\\n shortProjVertex = u_projectionMatrix * vec4(a_nextPos, 0.0, 1.0);\\n }\\n //Intersection algorithm based on theory by Paul Bourke (http://paulbourke.net/geometry/pointlineplane/).\\n vec4 p1 = u_projectionMatrix * vec4(longVertex, 0.0, 1.0) + offsetMatrix * vec4(longOffset, 0.0, 0.0);\\n vec4 p2 = projPos + offsetMatrix * vec4(longOffset, 0.0, 0.0);\\n vec4 p3 = shortProjVertex + offsetMatrix * vec4(-shortOffset, 0.0, 0.0);\\n vec4 p4 = shortProjVertex + offsetMatrix * vec4(shortOffset, 0.0, 0.0);\\n float denom = (p4.y - p3.y) * (p2.x - p1.x) - (p4.x - p3.x) * (p2.y - p1.y);\\n float firstU = ((p4.x - p3.x) * (p1.y - p3.y) - (p4.y - p3.y) * (p1.x - p3.x)) / denom;\\n float secondU = ((p2.x - p1.x) * (p1.y - p3.y) - (p2.y - p1.y) * (p1.x - p3.x)) / denom;\\n float epsilon = 0.000000000001;\\n if (firstU > epsilon && firstU < 1.0 - epsilon && secondU > epsilon && secondU < 1.0 - epsilon) {\\n shortProjVertex.x = p1.x + firstU * (p2.x - p1.x);\\n shortProjVertex.y = p1.y + firstU * (p2.y - p1.y);\\n offset = shortProjVertex.xy;\\n degenerate = true;\\n } else {\\n float miterLength = abs(halfWidth / dot(normal, tmpNormal));\\n offset = normal * direction * miterLength;\\n }\\n return degenerate;\\n}\\n\\nvoid squareCap(out vec2 offset, out float round, in bool isRound, in vec2 nextP,\\n in float turnDir, in float direction) {\\n round = 0.0;\\n vec2 dirVect = a_position - nextP;\\n vec2 firstNormal = normalize(dirVect);\\n vec2 secondNormal = vec2(turnDir * firstNormal.y * direction, -turnDir * firstNormal.x * direction);\\n vec2 hypotenuse = normalize(firstNormal - secondNormal);\\n vec2 normal = vec2(turnDir * hypotenuse.y * direction, -turnDir * hypotenuse.x * direction);\\n float length = sqrt(v_halfWidth * v_halfWidth * 2.0);\\n offset = normal * length;\\n if (isRound) {\\n round = 1.0;\\n }\\n}\\n\\nvoid main(void) {\\n bool degenerate = false;\\n float direction = float(sign(a_direction));\\n mat4 offsetMatrix = u_offsetScaleMatrix * u_offsetRotateMatrix;\\n vec2 offset;\\n vec4 projPos = u_projectionMatrix * vec4(a_position, 0.0, 1.0);\\n bool round = nearlyEquals(mod(a_direction, 2.0), 0.0);\\n\\n v_round = 0.0;\\n v_halfWidth = u_lineWidth / 2.0;\\n v_roundVertex = projPos.xy;\\n\\n if (nearlyEquals(mod(a_direction, 3.0), 0.0) || nearlyEquals(mod(a_direction, 17.0), 0.0)) {\\n alongNormal(offset, a_nextPos, 1.0, direction);\\n } else if (nearlyEquals(mod(a_direction, 5.0), 0.0) || nearlyEquals(mod(a_direction, 13.0), 0.0)) {\\n alongNormal(offset, a_lastPos, -1.0, direction);\\n } else if (nearlyEquals(mod(a_direction, 23.0), 0.0)) {\\n miterUp(offset, v_round, round, direction);\\n } else if (nearlyEquals(mod(a_direction, 19.0), 0.0)) {\\n degenerate = miterDown(offset, projPos, offsetMatrix, direction);\\n } else if (nearlyEquals(mod(a_direction, 7.0), 0.0)) {\\n squareCap(offset, v_round, round, a_nextPos, 1.0, direction);\\n } else if (nearlyEquals(mod(a_direction, 11.0), 0.0)) {\\n squareCap(offset, v_round, round, a_lastPos, -1.0, direction);\\n }\\n if (!degenerate) {\\n vec4 offsets = offsetMatrix * vec4(offset, 0.0, 0.0);\\n gl_Position = projPos + offsets;\\n } else {\\n gl_Position = vec4(offset, 0.0, 1.0);\\n }\\n}\\n\\n\\n' :\n 'varying float a;varying vec2 aVertex;varying float c;attribute vec2 d;attribute vec2 e;attribute vec2 f;attribute float g;uniform mat4 h;uniform mat4 i;uniform mat4 j;uniform float k;uniform float l;bool nearlyEquals(in float value,in float ref){float epsilon=0.000000000001;return value>=ref-epsilon&&value<=ref+epsilon;}void alongNormal(out vec2 offset,in vec2 nextP,in float turnDir,in float direction){vec2 dirVect=nextP-e;vec2 normal=normalize(vec2(-turnDir*dirVect.y,turnDir*dirVect.x));offset=k/2.0*normal*direction;}void miterUp(out vec2 offset,out float round,in bool isRound,in float direction){float halfWidth=k/2.0;vec2 tangent=normalize(normalize(f-e)+normalize(e-d));vec2 normal=vec2(-tangent.y,tangent.x);vec2 dirVect=f-e;vec2 tmpNormal=normalize(vec2(-dirVect.y,dirVect.x));float miterLength=abs(halfWidth/dot(normal,tmpNormal));offset=normal*direction*miterLength;round=0.0;if(isRound){round=1.0;}else if(miterLength>l+k){offset=halfWidth*tmpNormal*direction;}} bool miterDown(out vec2 offset,in vec4 projPos,in mat4 offsetMatrix,in float direction){bool degenerate=false;vec2 tangent=normalize(normalize(f-e)+normalize(e-d));vec2 normal=vec2(-tangent.y,tangent.x);vec2 dirVect=d-e;vec2 tmpNormal=normalize(vec2(-dirVect.y,dirVect.x));vec2 longOffset,shortOffset,longVertex;vec4 shortProjVertex;float halfWidth=k/2.0;if(length(f-e)>length(d-e)){longOffset=tmpNormal*direction*halfWidth;shortOffset=normalize(vec2(dirVect.y,-dirVect.x))*direction*halfWidth;longVertex=f;shortProjVertex=h*vec4(d,0.0,1.0);}else{shortOffset=tmpNormal*direction*halfWidth;longOffset=normalize(vec2(dirVect.y,-dirVect.x))*direction*halfWidth;longVertex=d;shortProjVertex=h*vec4(f,0.0,1.0);}vec4 p1=h*vec4(longVertex,0.0,1.0)+offsetMatrix*vec4(longOffset,0.0,0.0);vec4 p2=projPos+offsetMatrix*vec4(longOffset,0.0,0.0);vec4 p3=shortProjVertex+offsetMatrix*vec4(-shortOffset,0.0,0.0);vec4 p4=shortProjVertex+offsetMatrix*vec4(shortOffset,0.0,0.0);float denom=(p4.y-p3.y)*(p2.x-p1.x)-(p4.x-p3.x)*(p2.y-p1.y);float firstU=((p4.x-p3.x)*(p1.y-p3.y)-(p4.y-p3.y)*(p1.x-p3.x))/denom;float secondU=((p2.x-p1.x)*(p1.y-p3.y)-(p2.y-p1.y)*(p1.x-p3.x))/denom;float epsilon=0.000000000001;if(firstU>epsilon&&firstU<1.0-epsilon&&secondU>epsilon&&secondU<1.0-epsilon){shortProjVertex.x=p1.x+firstU*(p2.x-p1.x);shortProjVertex.y=p1.y+firstU*(p2.y-p1.y);offset=shortProjVertex.xy;degenerate=true;}else{float miterLength=abs(halfWidth/dot(normal,tmpNormal));offset=normal*direction*miterLength;}return degenerate;}void squareCap(out vec2 offset,out float round,in bool isRound,in vec2 nextP,in float turnDir,in float direction){round=0.0;vec2 dirVect=e-nextP;vec2 firstNormal=normalize(dirVect);vec2 secondNormal=vec2(turnDir*firstNormal.y*direction,-turnDir*firstNormal.x*direction);vec2 hypotenuse=normalize(firstNormal-secondNormal);vec2 normal=vec2(turnDir*hypotenuse.y*direction,-turnDir*hypotenuse.x*direction);float length=sqrt(c*c*2.0);offset=normal*length;if(isRound){round=1.0;}} void main(void){bool degenerate=false;float direction=float(sign(g));mat4 offsetMatrix=i*j;vec2 offset;vec4 projPos=h*vec4(e,0.0,1.0);bool round=nearlyEquals(mod(g,2.0),0.0);a=0.0;c=k/2.0;aVertex=projPos.xy;if(nearlyEquals(mod(g,3.0),0.0)||nearlyEquals(mod(g,17.0),0.0)){alongNormal(offset,f,1.0,direction);}else if(nearlyEquals(mod(g,5.0),0.0)||nearlyEquals(mod(g,13.0),0.0)){alongNormal(offset,d,-1.0,direction);}else if(nearlyEquals(mod(g,23.0),0.0)){miterUp(offset,a,round,direction);}else if(nearlyEquals(mod(g,19.0),0.0)){degenerate=miterDown(offset,projPos,offsetMatrix,direction);}else if(nearlyEquals(mod(g,7.0),0.0)){squareCap(offset,a,round,f,1.0,direction);}else if(nearlyEquals(mod(g,11.0),0.0)){squareCap(offset,a,round,d,-1.0,direction);}if(!degenerate){vec4 offsets=offsetMatrix*vec4(offset,0.0,0.0);gl_Position=projPos+offsets;}else{gl_Position=vec4(offset,0.0,1.0);}}');\n","/**\n * @module ol/render/webgl/linestringreplay/defaultshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../../webgl.js';\n\n/**\n * @constructor\n * @param {WebGLRenderingContext} gl GL.\n * @param {WebGLProgram} program Program.\n * @struct\n */\nconst Locations = function(gl, program) {\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_projectionMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'h');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_offsetScaleMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_offsetScaleMatrix' : 'i');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_offsetRotateMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_offsetRotateMatrix' : 'j');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_lineWidth = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_lineWidth' : 'k');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_miterLimit = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_miterLimit' : 'l');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_opacity = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_opacity' : 'm');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_color = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_color' : 'n');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_size = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_size' : 'o');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_pixelRatio = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_pixelRatio' : 'p');\n\n /**\n * @type {number}\n */\n this.a_lastPos = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_lastPos' : 'd');\n\n /**\n * @type {number}\n */\n this.a_position = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_position' : 'e');\n\n /**\n * @type {number}\n */\n this.a_nextPos = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_nextPos' : 'f');\n\n /**\n * @type {number}\n */\n this.a_direction = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_direction' : 'g');\n};\n\nexport default Locations;\n","/**\n * @module ol/render/webgl/LineStringReplay\n */\nimport {getUid, inherits} from '../../util.js';\nimport {equals} from '../../array.js';\nimport {asArray} from '../../color.js';\nimport {intersects} from '../../extent.js';\nimport {linearRingIsClockwise} from '../../geom/flat/orient.js';\nimport {translate} from '../../geom/flat/transform.js';\nimport {lineStringIsClosed} from '../../geom/flat/topology.js';\nimport {isEmpty} from '../../obj.js';\nimport {DEFAULT_LINECAP, DEFAULT_LINEDASH, DEFAULT_LINEDASHOFFSET,\n DEFAULT_LINEJOIN, DEFAULT_LINEWIDTH, DEFAULT_MITERLIMIT, DEFAULT_STROKESTYLE,\n triangleIsCounterClockwise} from '../webgl.js';\nimport WebGLReplay from '../webgl/Replay.js';\nimport {fragment, vertex} from '../webgl/linestringreplay/defaultshader.js';\nimport Locations from '../webgl/linestringreplay/defaultshader/Locations.js';\nimport {FLOAT} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n\n/**\n * @enum {number}\n */\nconst Instruction = {\n ROUND: 2,\n BEGIN_LINE: 3,\n END_LINE: 5,\n BEGIN_LINE_CAP: 7,\n END_LINE_CAP: 11,\n BEVEL_FIRST: 13,\n BEVEL_SECOND: 17,\n MITER_BOTTOM: 19,\n MITER_TOP: 23\n};\n\n\n/**\n * @constructor\n * @extends {module:ol/render/webgl/Replay}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Max extent.\n * @struct\n */\nconst WebGLLineStringReplay = function(tolerance, maxExtent) {\n WebGLReplay.call(this, tolerance, maxExtent);\n\n /**\n * @private\n * @type {module:ol/render/webgl/linestringreplay/defaultshader/Locations}\n */\n this.defaultLocations_ = null;\n\n /**\n * @private\n * @type {Array.<Array.<?>>}\n */\n this.styles_ = [];\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.styleIndices_ = [];\n\n /**\n * @private\n * @type {{strokeColor: (Array.<number>|null),\n * lineCap: (string|undefined),\n * lineDash: Array.<number>,\n * lineDashOffset: (number|undefined),\n * lineJoin: (string|undefined),\n * lineWidth: (number|undefined),\n * miterLimit: (number|undefined),\n * changed: boolean}|null}\n */\n this.state_ = {\n strokeColor: null,\n lineCap: undefined,\n lineDash: null,\n lineDashOffset: undefined,\n lineJoin: undefined,\n lineWidth: undefined,\n miterLimit: undefined,\n changed: false\n };\n\n};\n\ninherits(WebGLLineStringReplay, WebGLReplay);\n\n\n/**\n * Draw one segment.\n * @private\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n */\nWebGLLineStringReplay.prototype.drawCoordinates_ = function(flatCoordinates, offset, end, stride) {\n\n let i, ii;\n let numVertices = this.vertices.length;\n let numIndices = this.indices.length;\n //To save a vertex, the direction of a point is a product of the sign (1 or -1), a prime from\n //Instruction, and a rounding factor (1 or 2). If the product is even,\n //we round it. If it is odd, we don't.\n const lineJoin = this.state_.lineJoin === 'bevel' ? 0 :\n this.state_.lineJoin === 'miter' ? 1 : 2;\n const lineCap = this.state_.lineCap === 'butt' ? 0 :\n this.state_.lineCap === 'square' ? 1 : 2;\n const closed = lineStringIsClosed(flatCoordinates, offset, end, stride);\n let startCoords, sign, n;\n let lastIndex = numIndices;\n let lastSign = 1;\n //We need the adjacent vertices to define normals in joins. p0 = last, p1 = current, p2 = next.\n let p0, p1, p2;\n\n for (i = offset, ii = end; i < ii; i += stride) {\n\n n = numVertices / 7;\n\n p0 = p1;\n p1 = p2 || [flatCoordinates[i], flatCoordinates[i + 1]];\n //First vertex.\n if (i === offset) {\n p2 = [flatCoordinates[i + stride], flatCoordinates[i + stride + 1]];\n if (end - offset === stride * 2 && equals(p1, p2)) {\n break;\n }\n if (closed) {\n //A closed line! Complete the circle.\n p0 = [flatCoordinates[end - stride * 2],\n flatCoordinates[end - stride * 2 + 1]];\n\n startCoords = p2;\n } else {\n //Add the first two/four vertices.\n\n if (lineCap) {\n numVertices = this.addVertices_([0, 0], p1, p2,\n lastSign * Instruction.BEGIN_LINE_CAP * lineCap, numVertices);\n\n numVertices = this.addVertices_([0, 0], p1, p2,\n -lastSign * Instruction.BEGIN_LINE_CAP * lineCap, numVertices);\n\n this.indices[numIndices++] = n + 2;\n this.indices[numIndices++] = n;\n this.indices[numIndices++] = n + 1;\n\n this.indices[numIndices++] = n + 1;\n this.indices[numIndices++] = n + 3;\n this.indices[numIndices++] = n + 2;\n\n }\n\n numVertices = this.addVertices_([0, 0], p1, p2,\n lastSign * Instruction.BEGIN_LINE * (lineCap || 1), numVertices);\n\n numVertices = this.addVertices_([0, 0], p1, p2,\n -lastSign * Instruction.BEGIN_LINE * (lineCap || 1), numVertices);\n\n lastIndex = numVertices / 7 - 1;\n\n continue;\n }\n } else if (i === end - stride) {\n //Last vertex.\n if (closed) {\n //Same as the first vertex.\n p2 = startCoords;\n break;\n } else {\n p0 = p0 || [0, 0];\n\n numVertices = this.addVertices_(p0, p1, [0, 0],\n lastSign * Instruction.END_LINE * (lineCap || 1), numVertices);\n\n numVertices = this.addVertices_(p0, p1, [0, 0],\n -lastSign * Instruction.END_LINE * (lineCap || 1), numVertices);\n\n this.indices[numIndices++] = n;\n this.indices[numIndices++] = lastIndex - 1;\n this.indices[numIndices++] = lastIndex;\n\n this.indices[numIndices++] = lastIndex;\n this.indices[numIndices++] = n + 1;\n this.indices[numIndices++] = n;\n\n if (lineCap) {\n numVertices = this.addVertices_(p0, p1, [0, 0],\n lastSign * Instruction.END_LINE_CAP * lineCap, numVertices);\n\n numVertices = this.addVertices_(p0, p1, [0, 0],\n -lastSign * Instruction.END_LINE_CAP * lineCap, numVertices);\n\n this.indices[numIndices++] = n + 2;\n this.indices[numIndices++] = n;\n this.indices[numIndices++] = n + 1;\n\n this.indices[numIndices++] = n + 1;\n this.indices[numIndices++] = n + 3;\n this.indices[numIndices++] = n + 2;\n\n }\n\n break;\n }\n } else {\n p2 = [flatCoordinates[i + stride], flatCoordinates[i + stride + 1]];\n }\n\n // We group CW and straight lines, thus the not so inituitive CCW checking function.\n sign = triangleIsCounterClockwise(p0[0], p0[1], p1[0], p1[1], p2[0], p2[1])\n ? -1 : 1;\n\n numVertices = this.addVertices_(p0, p1, p2,\n sign * Instruction.BEVEL_FIRST * (lineJoin || 1), numVertices);\n\n numVertices = this.addVertices_(p0, p1, p2,\n sign * Instruction.BEVEL_SECOND * (lineJoin || 1), numVertices);\n\n numVertices = this.addVertices_(p0, p1, p2,\n -sign * Instruction.MITER_BOTTOM * (lineJoin || 1), numVertices);\n\n if (i > offset) {\n this.indices[numIndices++] = n;\n this.indices[numIndices++] = lastIndex - 1;\n this.indices[numIndices++] = lastIndex;\n\n this.indices[numIndices++] = n + 2;\n this.indices[numIndices++] = n;\n this.indices[numIndices++] = lastSign * sign > 0 ? lastIndex : lastIndex - 1;\n }\n\n this.indices[numIndices++] = n;\n this.indices[numIndices++] = n + 2;\n this.indices[numIndices++] = n + 1;\n\n lastIndex = n + 2;\n lastSign = sign;\n\n //Add miter\n if (lineJoin) {\n numVertices = this.addVertices_(p0, p1, p2,\n sign * Instruction.MITER_TOP * lineJoin, numVertices);\n\n this.indices[numIndices++] = n + 1;\n this.indices[numIndices++] = n + 3;\n this.indices[numIndices++] = n;\n }\n }\n\n if (closed) {\n n = n || numVertices / 7;\n sign = linearRingIsClockwise([p0[0], p0[1], p1[0], p1[1], p2[0], p2[1]], 0, 6, 2)\n ? 1 : -1;\n\n numVertices = this.addVertices_(p0, p1, p2,\n sign * Instruction.BEVEL_FIRST * (lineJoin || 1), numVertices);\n\n numVertices = this.addVertices_(p0, p1, p2,\n -sign * Instruction.MITER_BOTTOM * (lineJoin || 1), numVertices);\n\n this.indices[numIndices++] = n;\n this.indices[numIndices++] = lastIndex - 1;\n this.indices[numIndices++] = lastIndex;\n\n this.indices[numIndices++] = n + 1;\n this.indices[numIndices++] = n;\n this.indices[numIndices++] = lastSign * sign > 0 ? lastIndex : lastIndex - 1;\n }\n};\n\n/**\n * @param {Array.<number>} p0 Last coordinates.\n * @param {Array.<number>} p1 Current coordinates.\n * @param {Array.<number>} p2 Next coordinates.\n * @param {number} product Sign, instruction, and rounding product.\n * @param {number} numVertices Vertex counter.\n * @return {number} Vertex counter.\n * @private\n */\nWebGLLineStringReplay.prototype.addVertices_ = function(p0, p1, p2, product, numVertices) {\n this.vertices[numVertices++] = p0[0];\n this.vertices[numVertices++] = p0[1];\n this.vertices[numVertices++] = p1[0];\n this.vertices[numVertices++] = p1[1];\n this.vertices[numVertices++] = p2[0];\n this.vertices[numVertices++] = p2[1];\n this.vertices[numVertices++] = product;\n\n return numVertices;\n};\n\n/**\n * Check if the linestring can be drawn (i. e. valid).\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @return {boolean} The linestring can be drawn.\n * @private\n */\nWebGLLineStringReplay.prototype.isValid_ = function(flatCoordinates, offset, end, stride) {\n const range = end - offset;\n if (range < stride * 2) {\n return false;\n } else if (range === stride * 2) {\n const firstP = [flatCoordinates[offset], flatCoordinates[offset + 1]];\n const lastP = [flatCoordinates[offset + stride], flatCoordinates[offset + stride + 1]];\n return !equals(firstP, lastP);\n }\n\n return true;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLLineStringReplay.prototype.drawLineString = function(lineStringGeometry, feature) {\n let flatCoordinates = lineStringGeometry.getFlatCoordinates();\n const stride = lineStringGeometry.getStride();\n if (this.isValid_(flatCoordinates, 0, flatCoordinates.length, stride)) {\n flatCoordinates = translate(flatCoordinates, 0, flatCoordinates.length,\n stride, -this.origin[0], -this.origin[1]);\n if (this.state_.changed) {\n this.styleIndices_.push(this.indices.length);\n this.state_.changed = false;\n }\n this.startIndices.push(this.indices.length);\n this.startIndicesFeature.push(feature);\n this.drawCoordinates_(\n flatCoordinates, 0, flatCoordinates.length, stride);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLLineStringReplay.prototype.drawMultiLineString = function(multiLineStringGeometry, feature) {\n const indexCount = this.indices.length;\n const ends = multiLineStringGeometry.getEnds();\n ends.unshift(0);\n const flatCoordinates = multiLineStringGeometry.getFlatCoordinates();\n const stride = multiLineStringGeometry.getStride();\n let i, ii;\n if (ends.length > 1) {\n for (i = 1, ii = ends.length; i < ii; ++i) {\n if (this.isValid_(flatCoordinates, ends[i - 1], ends[i], stride)) {\n const lineString = translate(flatCoordinates, ends[i - 1], ends[i],\n stride, -this.origin[0], -this.origin[1]);\n this.drawCoordinates_(\n lineString, 0, lineString.length, stride);\n }\n }\n }\n if (this.indices.length > indexCount) {\n this.startIndices.push(indexCount);\n this.startIndicesFeature.push(feature);\n if (this.state_.changed) {\n this.styleIndices_.push(indexCount);\n this.state_.changed = false;\n }\n }\n};\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {Array.<Array.<number>>} holeFlatCoordinates Hole flat coordinates.\n * @param {number} stride Stride.\n */\nWebGLLineStringReplay.prototype.drawPolygonCoordinates = function(\n flatCoordinates, holeFlatCoordinates, stride) {\n if (!lineStringIsClosed(flatCoordinates, 0, flatCoordinates.length, stride)) {\n flatCoordinates.push(flatCoordinates[0]);\n flatCoordinates.push(flatCoordinates[1]);\n }\n this.drawCoordinates_(flatCoordinates, 0, flatCoordinates.length, stride);\n if (holeFlatCoordinates.length) {\n let i, ii;\n for (i = 0, ii = holeFlatCoordinates.length; i < ii; ++i) {\n if (!lineStringIsClosed(holeFlatCoordinates[i], 0, holeFlatCoordinates[i].length, stride)) {\n holeFlatCoordinates[i].push(holeFlatCoordinates[i][0]);\n holeFlatCoordinates[i].push(holeFlatCoordinates[i][1]);\n }\n this.drawCoordinates_(holeFlatCoordinates[i], 0,\n holeFlatCoordinates[i].length, stride);\n }\n }\n};\n\n\n/**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @param {number=} opt_index Index count.\n */\nWebGLLineStringReplay.prototype.setPolygonStyle = function(feature, opt_index) {\n const index = opt_index === undefined ? this.indices.length : opt_index;\n this.startIndices.push(index);\n this.startIndicesFeature.push(feature);\n if (this.state_.changed) {\n this.styleIndices_.push(index);\n this.state_.changed = false;\n }\n};\n\n\n/**\n * @return {number} Current index.\n */\nWebGLLineStringReplay.prototype.getCurrentIndex = function() {\n return this.indices.length;\n};\n\n\n/**\n * @inheritDoc\n **/\nWebGLLineStringReplay.prototype.finish = function(context) {\n // create, bind, and populate the vertices buffer\n this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n // create, bind, and populate the indices buffer\n this.indicesBuffer = new WebGLBuffer(this.indices);\n\n this.startIndices.push(this.indices.length);\n\n //Clean up, if there is nothing to draw\n if (this.styleIndices_.length === 0 && this.styles_.length > 0) {\n this.styles_ = [];\n }\n\n this.vertices = null;\n this.indices = null;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLLineStringReplay.prototype.getDeleteResourcesFunction = function(context) {\n const verticesBuffer = this.verticesBuffer;\n const indicesBuffer = this.indicesBuffer;\n return function() {\n context.deleteBuffer(verticesBuffer);\n context.deleteBuffer(indicesBuffer);\n };\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLLineStringReplay.prototype.setUpProgram = function(gl, context, size, pixelRatio) {\n // get the program\n const program = context.getProgram(fragment, vertex);\n\n // get the locations\n let locations;\n if (!this.defaultLocations_) {\n locations = new Locations(gl, program);\n this.defaultLocations_ = locations;\n } else {\n locations = this.defaultLocations_;\n }\n\n context.useProgram(program);\n\n // enable the vertex attrib arrays\n gl.enableVertexAttribArray(locations.a_lastPos);\n gl.vertexAttribPointer(locations.a_lastPos, 2, FLOAT,\n false, 28, 0);\n\n gl.enableVertexAttribArray(locations.a_position);\n gl.vertexAttribPointer(locations.a_position, 2, FLOAT,\n false, 28, 8);\n\n gl.enableVertexAttribArray(locations.a_nextPos);\n gl.vertexAttribPointer(locations.a_nextPos, 2, FLOAT,\n false, 28, 16);\n\n gl.enableVertexAttribArray(locations.a_direction);\n gl.vertexAttribPointer(locations.a_direction, 1, FLOAT,\n false, 28, 24);\n\n // Enable renderer specific uniforms.\n gl.uniform2fv(locations.u_size, size);\n gl.uniform1f(locations.u_pixelRatio, pixelRatio);\n\n return locations;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLLineStringReplay.prototype.shutDownProgram = function(gl, locations) {\n gl.disableVertexAttribArray(locations.a_lastPos);\n gl.disableVertexAttribArray(locations.a_position);\n gl.disableVertexAttribArray(locations.a_nextPos);\n gl.disableVertexAttribArray(locations.a_direction);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLLineStringReplay.prototype.drawReplay = function(gl, context, skippedFeaturesHash, hitDetection) {\n //Save GL parameters.\n const tmpDepthFunc = /** @type {number} */ (gl.getParameter(gl.DEPTH_FUNC));\n const tmpDepthMask = /** @type {boolean} */ (gl.getParameter(gl.DEPTH_WRITEMASK));\n\n if (!hitDetection) {\n gl.enable(gl.DEPTH_TEST);\n gl.depthMask(true);\n gl.depthFunc(gl.NOTEQUAL);\n }\n\n if (!isEmpty(skippedFeaturesHash)) {\n this.drawReplaySkipping_(gl, context, skippedFeaturesHash);\n } else {\n //Draw by style groups to minimize drawElements() calls.\n let i, start, end, nextStyle;\n end = this.startIndices[this.startIndices.length - 1];\n for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n start = this.styleIndices_[i];\n nextStyle = this.styles_[i];\n this.setStrokeStyle_(gl, nextStyle[0], nextStyle[1], nextStyle[2]);\n this.drawElements(gl, context, start, end);\n gl.clear(gl.DEPTH_BUFFER_BIT);\n end = start;\n }\n }\n if (!hitDetection) {\n gl.disable(gl.DEPTH_TEST);\n gl.clear(gl.DEPTH_BUFFER_BIT);\n //Restore GL parameters.\n gl.depthMask(tmpDepthMask);\n gl.depthFunc(tmpDepthFunc);\n }\n};\n\n\n/**\n * @private\n * @param {WebGLRenderingContext} gl gl.\n * @param {module:ol/webgl/Context} context Context.\n * @param {Object} skippedFeaturesHash Ids of features to skip.\n */\nWebGLLineStringReplay.prototype.drawReplaySkipping_ = function(gl, context, skippedFeaturesHash) {\n let i, start, end, nextStyle, groupStart, feature, featureUid, featureIndex, featureStart;\n featureIndex = this.startIndices.length - 2;\n end = start = this.startIndices[featureIndex + 1];\n for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n nextStyle = this.styles_[i];\n this.setStrokeStyle_(gl, nextStyle[0], nextStyle[1], nextStyle[2]);\n groupStart = this.styleIndices_[i];\n\n while (featureIndex >= 0 &&\n this.startIndices[featureIndex] >= groupStart) {\n featureStart = this.startIndices[featureIndex];\n feature = this.startIndicesFeature[featureIndex];\n featureUid = getUid(feature).toString();\n\n if (skippedFeaturesHash[featureUid]) {\n if (start !== end) {\n this.drawElements(gl, context, start, end);\n gl.clear(gl.DEPTH_BUFFER_BIT);\n }\n end = featureStart;\n }\n featureIndex--;\n start = featureStart;\n }\n if (start !== end) {\n this.drawElements(gl, context, start, end);\n gl.clear(gl.DEPTH_BUFFER_BIT);\n }\n start = end = groupStart;\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLLineStringReplay.prototype.drawHitDetectionReplayOneByOne = function(gl, context, skippedFeaturesHash,\n featureCallback, opt_hitExtent) {\n let i, start, end, nextStyle, groupStart, feature, featureUid, featureIndex;\n featureIndex = this.startIndices.length - 2;\n end = this.startIndices[featureIndex + 1];\n for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n nextStyle = this.styles_[i];\n this.setStrokeStyle_(gl, nextStyle[0], nextStyle[1], nextStyle[2]);\n groupStart = this.styleIndices_[i];\n\n while (featureIndex >= 0 &&\n this.startIndices[featureIndex] >= groupStart) {\n start = this.startIndices[featureIndex];\n feature = this.startIndicesFeature[featureIndex];\n featureUid = getUid(feature).toString();\n\n if (skippedFeaturesHash[featureUid] === undefined &&\n feature.getGeometry() &&\n (opt_hitExtent === undefined || intersects(\n /** @type {Array<number>} */ (opt_hitExtent),\n feature.getGeometry().getExtent()))) {\n gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n this.drawElements(gl, context, start, end);\n\n const result = featureCallback(feature);\n\n if (result) {\n return result;\n }\n\n }\n featureIndex--;\n end = start;\n }\n }\n return undefined;\n};\n\n\n/**\n * @private\n * @param {WebGLRenderingContext} gl gl.\n * @param {Array.<number>} color Color.\n * @param {number} lineWidth Line width.\n * @param {number} miterLimit Miter limit.\n */\nWebGLLineStringReplay.prototype.setStrokeStyle_ = function(gl, color, lineWidth, miterLimit) {\n gl.uniform4fv(this.defaultLocations_.u_color, color);\n gl.uniform1f(this.defaultLocations_.u_lineWidth, lineWidth);\n gl.uniform1f(this.defaultLocations_.u_miterLimit, miterLimit);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLLineStringReplay.prototype.setFillStrokeStyle = function(fillStyle, strokeStyle) {\n const strokeStyleLineCap = strokeStyle.getLineCap();\n this.state_.lineCap = strokeStyleLineCap !== undefined ?\n strokeStyleLineCap : DEFAULT_LINECAP;\n const strokeStyleLineDash = strokeStyle.getLineDash();\n this.state_.lineDash = strokeStyleLineDash ?\n strokeStyleLineDash : DEFAULT_LINEDASH;\n const strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();\n this.state_.lineDashOffset = strokeStyleLineDashOffset ?\n strokeStyleLineDashOffset : DEFAULT_LINEDASHOFFSET;\n const strokeStyleLineJoin = strokeStyle.getLineJoin();\n this.state_.lineJoin = strokeStyleLineJoin !== undefined ?\n strokeStyleLineJoin : DEFAULT_LINEJOIN;\n let strokeStyleColor = strokeStyle.getColor();\n if (!(strokeStyleColor instanceof CanvasGradient) &&\n !(strokeStyleColor instanceof CanvasPattern)) {\n strokeStyleColor = asArray(strokeStyleColor).map(function(c, i) {\n return i != 3 ? c / 255 : c;\n }) || DEFAULT_STROKESTYLE;\n } else {\n strokeStyleColor = DEFAULT_STROKESTYLE;\n }\n let strokeStyleWidth = strokeStyle.getWidth();\n strokeStyleWidth = strokeStyleWidth !== undefined ?\n strokeStyleWidth : DEFAULT_LINEWIDTH;\n let strokeStyleMiterLimit = strokeStyle.getMiterLimit();\n strokeStyleMiterLimit = strokeStyleMiterLimit !== undefined ?\n strokeStyleMiterLimit : DEFAULT_MITERLIMIT;\n if (!this.state_.strokeColor || !equals(this.state_.strokeColor, strokeStyleColor) ||\n this.state_.lineWidth !== strokeStyleWidth || this.state_.miterLimit !== strokeStyleMiterLimit) {\n this.state_.changed = true;\n this.state_.strokeColor = strokeStyleColor;\n this.state_.lineWidth = strokeStyleWidth;\n this.state_.miterLimit = strokeStyleMiterLimit;\n this.styles_.push([strokeStyleColor, strokeStyleWidth, strokeStyleMiterLimit]);\n }\n};\n\nexport default WebGLLineStringReplay;\n","/**\n * @module ol/render/webgl/polygonreplay/defaultshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\nimport WebGLFragment from '../../../webgl/Fragment.js';\nimport WebGLVertex from '../../../webgl/Vertex.js';\n\nexport const fragment = new WebGLFragment(DEBUG_WEBGL ?\n 'precision mediump float;\\n\\n\\n\\nuniform vec4 u_color;\\nuniform float u_opacity;\\n\\nvoid main(void) {\\n gl_FragColor = u_color;\\n float alpha = u_color.a * u_opacity;\\n if (alpha == 0.0) {\\n discard;\\n }\\n gl_FragColor.a = alpha;\\n}\\n' :\n 'precision mediump float;uniform vec4 e;uniform float f;void main(void){gl_FragColor=e;float alpha=e.a*f;if(alpha==0.0){discard;}gl_FragColor.a=alpha;}');\n\nexport const vertex = new WebGLVertex(DEBUG_WEBGL ?\n '\\n\\nattribute vec2 a_position;\\n\\nuniform mat4 u_projectionMatrix;\\nuniform mat4 u_offsetScaleMatrix;\\nuniform mat4 u_offsetRotateMatrix;\\n\\nvoid main(void) {\\n gl_Position = u_projectionMatrix * vec4(a_position, 0.0, 1.0);\\n}\\n\\n\\n' :\n 'attribute vec2 a;uniform mat4 b;uniform mat4 c;uniform mat4 d;void main(void){gl_Position=b*vec4(a,0.0,1.0);}');\n","/**\n * @module ol/render/webgl/polygonreplay/defaultshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../../webgl.js';\n\n/**\n * @constructor\n * @param {WebGLRenderingContext} gl GL.\n * @param {WebGLProgram} program Program.\n * @struct\n */\nconst Locations = function(gl, program) {\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_projectionMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'b');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_offsetScaleMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_offsetScaleMatrix' : 'c');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_offsetRotateMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_offsetRotateMatrix' : 'd');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_color = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_color' : 'e');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_opacity = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_opacity' : 'f');\n\n /**\n * @type {number}\n */\n this.a_position = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_position' : 'a');\n};\n\nexport default Locations;\n","/**\n * @module ol/structs/LinkedList\n */\n\n\n/**\n * @typedef {Object} Item\n * @property {module:ol/structs/LinkedList~Item} [prev]\n * @property {module:ol/structs/LinkedList~Item} [next]\n * @property {?} data\n */\n\n\n/**\n * Creates an empty linked list structure.\n *\n * @constructor\n * @struct\n * @param {boolean=} opt_circular The last item is connected to the first one,\n * and the first item to the last one. Default is true.\n */\nconst LinkedList = function(opt_circular) {\n\n /**\n * @private\n * @type {module:ol/structs/LinkedList~Item|undefined}\n */\n this.first_;\n\n /**\n * @private\n * @type {module:ol/structs/LinkedList~Item|undefined}\n */\n this.last_;\n\n /**\n * @private\n * @type {module:ol/structs/LinkedList~Item|undefined}\n */\n this.head_;\n\n /**\n * @private\n * @type {boolean}\n */\n this.circular_ = opt_circular === undefined ? true : opt_circular;\n\n /**\n * @private\n * @type {number}\n */\n this.length_ = 0;\n};\n\n/**\n * Inserts an item into the linked list right after the current one.\n *\n * @param {?} data Item data.\n */\nLinkedList.prototype.insertItem = function(data) {\n\n /** @type {module:ol/structs/LinkedList~Item} */\n const item = {\n prev: undefined,\n next: undefined,\n data: data\n };\n\n const head = this.head_;\n\n //Initialize the list.\n if (!head) {\n this.first_ = item;\n this.last_ = item;\n if (this.circular_) {\n item.next = item;\n item.prev = item;\n }\n } else {\n //Link the new item to the adjacent ones.\n const next = head.next;\n item.prev = head;\n item.next = next;\n head.next = item;\n if (next) {\n next.prev = item;\n }\n\n if (head === this.last_) {\n this.last_ = item;\n }\n }\n this.head_ = item;\n this.length_++;\n};\n\n/**\n * Removes the current item from the list. Sets the cursor to the next item,\n * if possible.\n */\nLinkedList.prototype.removeItem = function() {\n const head = this.head_;\n if (head) {\n const next = head.next;\n const prev = head.prev;\n if (next) {\n next.prev = prev;\n }\n if (prev) {\n prev.next = next;\n }\n this.head_ = next || prev;\n\n if (this.first_ === this.last_) {\n this.head_ = undefined;\n this.first_ = undefined;\n this.last_ = undefined;\n } else if (this.first_ === head) {\n this.first_ = this.head_;\n } else if (this.last_ === head) {\n this.last_ = prev ? this.head_.prev : this.head_;\n }\n this.length_--;\n }\n};\n\n/**\n * Sets the cursor to the first item, and returns the associated data.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.firstItem = function() {\n this.head_ = this.first_;\n if (this.head_) {\n return this.head_.data;\n }\n return undefined;\n};\n\n/**\n* Sets the cursor to the last item, and returns the associated data.\n*\n* @return {?} Item data.\n*/\nLinkedList.prototype.lastItem = function() {\n this.head_ = this.last_;\n if (this.head_) {\n return this.head_.data;\n }\n return undefined;\n};\n\n/**\n * Sets the cursor to the next item, and returns the associated data.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.nextItem = function() {\n if (this.head_ && this.head_.next) {\n this.head_ = this.head_.next;\n return this.head_.data;\n }\n return undefined;\n};\n\n/**\n * Returns the next item's data without moving the cursor.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.getNextItem = function() {\n if (this.head_ && this.head_.next) {\n return this.head_.next.data;\n }\n return undefined;\n};\n\n/**\n * Sets the cursor to the previous item, and returns the associated data.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.prevItem = function() {\n if (this.head_ && this.head_.prev) {\n this.head_ = this.head_.prev;\n return this.head_.data;\n }\n return undefined;\n};\n\n/**\n * Returns the previous item's data without moving the cursor.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.getPrevItem = function() {\n if (this.head_ && this.head_.prev) {\n return this.head_.prev.data;\n }\n return undefined;\n};\n\n/**\n * Returns the current item's data.\n *\n * @return {?} Item data.\n */\nLinkedList.prototype.getCurrItem = function() {\n if (this.head_) {\n return this.head_.data;\n }\n return undefined;\n};\n\n/**\n * Sets the first item of the list. This only works for circular lists, and sets\n * the last item accordingly.\n */\nLinkedList.prototype.setFirstItem = function() {\n if (this.circular_ && this.head_) {\n this.first_ = this.head_;\n this.last_ = this.head_.prev;\n }\n};\n\n/**\n * Concatenates two lists.\n * @param {module:ol/structs/LinkedList} list List to merge into the current list.\n */\nLinkedList.prototype.concat = function(list) {\n if (list.head_) {\n if (this.head_) {\n const end = this.head_.next;\n this.head_.next = list.first_;\n list.first_.prev = this.head_;\n end.prev = list.last_;\n list.last_.next = end;\n this.length_ += list.length_;\n } else {\n this.head_ = list.head_;\n this.first_ = list.first_;\n this.last_ = list.last_;\n this.length_ = list.length_;\n }\n list.head_ = undefined;\n list.first_ = undefined;\n list.last_ = undefined;\n list.length_ = 0;\n }\n};\n\n/**\n * Returns the current length of the list.\n *\n * @return {number} Length.\n */\nLinkedList.prototype.getLength = function() {\n return this.length_;\n};\nexport default LinkedList;\n","/**\n * @module ol/render/webgl/PolygonReplay\n */\nimport {getUid, inherits} from '../../util.js';\nimport {equals} from '../../array.js';\nimport {asArray} from '../../color.js';\nimport {intersects} from '../../extent.js';\nimport {isEmpty} from '../../obj.js';\nimport {linearRingContainsXY} from '../../geom/flat/contains.js';\nimport {linearRingIsClockwise} from '../../geom/flat/orient.js';\nimport {translate} from '../../geom/flat/transform.js';\nimport {fragment, vertex} from '../webgl/polygonreplay/defaultshader.js';\nimport Locations from '../webgl/polygonreplay/defaultshader/Locations.js';\nimport WebGLLineStringReplay from '../webgl/LineStringReplay.js';\nimport WebGLReplay from '../webgl/Replay.js';\nimport {triangleIsCounterClockwise, EPSILON, DEFAULT_FILLSTYLE} from '../webgl.js';\nimport Stroke from '../../style/Stroke.js';\nimport LinkedList from '../../structs/LinkedList.js';\nimport RBush from '../../structs/RBush.js';\nimport {FLOAT} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n\n/**\n * @typedef {Object} PolygonVertex\n * @property {number} x\n * @property {number} y\n * @property {number} i\n * @property {boolean} [reflex]\n */\n\n/**\n * @typedef {Object} PolygonSegment\n * @property {module:ol/render/webgl/PolygonReplay~PolygonVertex} p0\n * @property {module:ol/render/webgl/PolygonReplay~PolygonVertex} p1\n */\n\n\n/**\n * @constructor\n * @extends {module:ol/render/webgl/Replay}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Max extent.\n * @struct\n */\nconst WebGLPolygonReplay = function(tolerance, maxExtent) {\n WebGLReplay.call(this, tolerance, maxExtent);\n\n this.lineStringReplay = new WebGLLineStringReplay(\n tolerance, maxExtent);\n\n /**\n * @private\n * @type {module:ol/render/webgl/polygonreplay/defaultshader/Locations}\n */\n this.defaultLocations_ = null;\n\n /**\n * @private\n * @type {Array.<Array.<number>>}\n */\n this.styles_ = [];\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.styleIndices_ = [];\n\n /**\n * @private\n * @type {{fillColor: (Array.<number>|null),\n * changed: boolean}|null}\n */\n this.state_ = {\n fillColor: null,\n changed: false\n };\n\n};\n\ninherits(WebGLPolygonReplay, WebGLReplay);\n\n\n/**\n * Draw one polygon.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {Array.<Array.<number>>} holeFlatCoordinates Hole flat coordinates.\n * @param {number} stride Stride.\n * @private\n */\nWebGLPolygonReplay.prototype.drawCoordinates_ = function(\n flatCoordinates, holeFlatCoordinates, stride) {\n // Triangulate the polygon\n const outerRing = new LinkedList();\n const rtree = new RBush();\n // Initialize the outer ring\n this.processFlatCoordinates_(flatCoordinates, stride, outerRing, rtree, true);\n const maxCoords = this.getMaxCoords_(outerRing);\n\n // Eliminate holes, if there are any\n if (holeFlatCoordinates.length) {\n let i, ii;\n const holeLists = [];\n for (i = 0, ii = holeFlatCoordinates.length; i < ii; ++i) {\n const holeList = {\n list: new LinkedList(),\n maxCoords: undefined,\n rtree: new RBush()\n };\n holeLists.push(holeList);\n this.processFlatCoordinates_(holeFlatCoordinates[i],\n stride, holeList.list, holeList.rtree, false);\n this.classifyPoints_(holeList.list, holeList.rtree, true);\n holeList.maxCoords = this.getMaxCoords_(holeList.list);\n }\n holeLists.sort(function(a, b) {\n return b.maxCoords[0] === a.maxCoords[0] ?\n a.maxCoords[1] - b.maxCoords[1] : b.maxCoords[0] - a.maxCoords[0];\n });\n for (i = 0; i < holeLists.length; ++i) {\n const currList = holeLists[i].list;\n const start = currList.firstItem();\n let currItem = start;\n let intersection;\n do {\n //TODO: Triangulate holes when they intersect the outer ring.\n if (this.getIntersections_(currItem, rtree).length) {\n intersection = true;\n break;\n }\n currItem = currList.nextItem();\n } while (start !== currItem);\n if (!intersection) {\n if (this.bridgeHole_(currList, holeLists[i].maxCoords[0], outerRing, maxCoords[0], rtree)) {\n rtree.concat(holeLists[i].rtree);\n this.classifyPoints_(outerRing, rtree, false);\n }\n }\n }\n } else {\n this.classifyPoints_(outerRing, rtree, false);\n }\n this.triangulate_(outerRing, rtree);\n};\n\n\n/**\n * Inserts flat coordinates in a linked list and adds them to the vertex buffer.\n * @private\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} stride Stride.\n * @param {module:ol/structs/LinkedList} list Linked list.\n * @param {module:ol/structs/RBush} rtree R-Tree of the polygon.\n * @param {boolean} clockwise Coordinate order should be clockwise.\n */\nWebGLPolygonReplay.prototype.processFlatCoordinates_ = function(\n flatCoordinates, stride, list, rtree, clockwise) {\n const isClockwise = linearRingIsClockwise(flatCoordinates,\n 0, flatCoordinates.length, stride);\n let i, ii;\n let n = this.vertices.length / 2;\n /** @type {module:ol/render/webgl/PolygonReplay~PolygonVertex} */\n let start;\n /** @type {module:ol/render/webgl/PolygonReplay~PolygonVertex} */\n let p0;\n /** @type {module:ol/render/webgl/PolygonReplay~PolygonVertex} */\n let p1;\n const extents = [];\n const segments = [];\n if (clockwise === isClockwise) {\n start = this.createPoint_(flatCoordinates[0], flatCoordinates[1], n++);\n p0 = start;\n for (i = stride, ii = flatCoordinates.length; i < ii; i += stride) {\n p1 = this.createPoint_(flatCoordinates[i], flatCoordinates[i + 1], n++);\n segments.push(this.insertItem_(p0, p1, list));\n extents.push([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y), Math.max(p0.x, p1.x),\n Math.max(p0.y, p1.y)]);\n p0 = p1;\n }\n segments.push(this.insertItem_(p1, start, list));\n extents.push([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y), Math.max(p0.x, p1.x),\n Math.max(p0.y, p1.y)]);\n } else {\n const end = flatCoordinates.length - stride;\n start = this.createPoint_(flatCoordinates[end], flatCoordinates[end + 1], n++);\n p0 = start;\n for (i = end - stride, ii = 0; i >= ii; i -= stride) {\n p1 = this.createPoint_(flatCoordinates[i], flatCoordinates[i + 1], n++);\n segments.push(this.insertItem_(p0, p1, list));\n extents.push([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y), Math.max(p0.x, p1.x),\n Math.max(p0.y, p1.y)]);\n p0 = p1;\n }\n segments.push(this.insertItem_(p1, start, list));\n extents.push([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y), Math.max(p0.x, p1.x),\n Math.max(p0.y, p1.y)]);\n }\n rtree.load(extents, segments);\n};\n\n\n/**\n * Returns the rightmost coordinates of a polygon on the X axis.\n * @private\n * @param {module:ol/structs/LinkedList} list Polygons ring.\n * @return {Array.<number>} Max X coordinates.\n */\nWebGLPolygonReplay.prototype.getMaxCoords_ = function(list) {\n const start = list.firstItem();\n let seg = start;\n let maxCoords = [seg.p0.x, seg.p0.y];\n\n do {\n seg = list.nextItem();\n if (seg.p0.x > maxCoords[0]) {\n maxCoords = [seg.p0.x, seg.p0.y];\n }\n } while (seg !== start);\n\n return maxCoords;\n};\n\n\n/**\n * Classifies the points of a polygon list as convex, reflex. Removes collinear vertices.\n * @private\n * @param {module:ol/structs/LinkedList} list Polygon ring.\n * @param {module:ol/structs/RBush} rtree R-Tree of the polygon.\n * @param {boolean} ccw The orientation of the polygon is counter-clockwise.\n * @return {boolean} There were reclassified points.\n */\nWebGLPolygonReplay.prototype.classifyPoints_ = function(list, rtree, ccw) {\n let start = list.firstItem();\n let s0 = start;\n let s1 = list.nextItem();\n let pointsReclassified = false;\n do {\n const reflex = ccw ? triangleIsCounterClockwise(s1.p1.x,\n s1.p1.y, s0.p1.x, s0.p1.y, s0.p0.x, s0.p0.y) :\n triangleIsCounterClockwise(s0.p0.x, s0.p0.y, s0.p1.x,\n s0.p1.y, s1.p1.x, s1.p1.y);\n if (reflex === undefined) {\n this.removeItem_(s0, s1, list, rtree);\n pointsReclassified = true;\n if (s1 === start) {\n start = list.getNextItem();\n }\n s1 = s0;\n list.prevItem();\n } else if (s0.p1.reflex !== reflex) {\n s0.p1.reflex = reflex;\n pointsReclassified = true;\n }\n s0 = s1;\n s1 = list.nextItem();\n } while (s0 !== start);\n return pointsReclassified;\n};\n\n\n/**\n * @private\n * @param {module:ol/structs/LinkedList} hole Linked list of the hole.\n * @param {number} holeMaxX Maximum X value of the hole.\n * @param {module:ol/structs/LinkedList} list Linked list of the polygon.\n * @param {number} listMaxX Maximum X value of the polygon.\n * @param {module:ol/structs/RBush} rtree R-Tree of the polygon.\n * @return {boolean} Bridging was successful.\n */\nWebGLPolygonReplay.prototype.bridgeHole_ = function(hole, holeMaxX,\n list, listMaxX, rtree) {\n let seg = hole.firstItem();\n while (seg.p1.x !== holeMaxX) {\n seg = hole.nextItem();\n }\n\n const p1 = seg.p1;\n /** @type {module:ol/render/webgl/PolygonReplay~PolygonVertex} */\n const p2 = {x: listMaxX, y: p1.y, i: -1};\n let minDist = Infinity;\n let i, ii, bestPoint;\n /** @type {module:ol/render/webgl/PolygonReplay~PolygonVertex} */\n let p5;\n\n const intersectingSegments = this.getIntersections_({p0: p1, p1: p2}, rtree, true);\n for (i = 0, ii = intersectingSegments.length; i < ii; ++i) {\n const currSeg = intersectingSegments[i];\n const intersection = this.calculateIntersection_(p1, p2, currSeg.p0,\n currSeg.p1, true);\n const dist = Math.abs(p1.x - intersection[0]);\n if (dist < minDist && triangleIsCounterClockwise(p1.x, p1.y,\n currSeg.p0.x, currSeg.p0.y, currSeg.p1.x, currSeg.p1.y) !== undefined) {\n minDist = dist;\n p5 = {x: intersection[0], y: intersection[1], i: -1};\n seg = currSeg;\n }\n }\n if (minDist === Infinity) {\n return false;\n }\n bestPoint = seg.p1;\n\n if (minDist > 0) {\n const pointsInTriangle = this.getPointsInTriangle_(p1, p5, seg.p1, rtree);\n if (pointsInTriangle.length) {\n let theta = Infinity;\n for (i = 0, ii = pointsInTriangle.length; i < ii; ++i) {\n const currPoint = pointsInTriangle[i];\n const currTheta = Math.atan2(p1.y - currPoint.y, p2.x - currPoint.x);\n if (currTheta < theta || (currTheta === theta && currPoint.x < bestPoint.x)) {\n theta = currTheta;\n bestPoint = currPoint;\n }\n }\n }\n }\n\n seg = list.firstItem();\n while (seg.p1.x !== bestPoint.x || seg.p1.y !== bestPoint.y) {\n seg = list.nextItem();\n }\n\n //We clone the bridge points as they can have different convexity.\n const p0Bridge = {x: p1.x, y: p1.y, i: p1.i, reflex: undefined};\n const p1Bridge = {x: seg.p1.x, y: seg.p1.y, i: seg.p1.i, reflex: undefined};\n\n hole.getNextItem().p0 = p0Bridge;\n this.insertItem_(p1, seg.p1, hole, rtree);\n this.insertItem_(p1Bridge, p0Bridge, hole, rtree);\n seg.p1 = p1Bridge;\n hole.setFirstItem();\n list.concat(hole);\n\n return true;\n};\n\n\n/**\n * @private\n * @param {module:ol/structs/LinkedList} list Linked list of the polygon.\n * @param {module:ol/structs/RBush} rtree R-Tree of the polygon.\n */\nWebGLPolygonReplay.prototype.triangulate_ = function(list, rtree) {\n let ccw = false;\n let simple = this.isSimple_(list, rtree);\n\n // Start clipping ears\n while (list.getLength() > 3) {\n if (simple) {\n if (!this.clipEars_(list, rtree, simple, ccw)) {\n if (!this.classifyPoints_(list, rtree, ccw)) {\n // Due to the behavior of OL's PIP algorithm, the ear clipping cannot\n // introduce touching segments. However, the original data may have some.\n if (!this.resolveSelfIntersections_(list, rtree, true)) {\n break;\n }\n }\n }\n } else {\n if (!this.clipEars_(list, rtree, simple, ccw)) {\n // We ran out of ears, try to reclassify.\n if (!this.classifyPoints_(list, rtree, ccw)) {\n // We have a bad polygon, try to resolve local self-intersections.\n if (!this.resolveSelfIntersections_(list, rtree)) {\n simple = this.isSimple_(list, rtree);\n if (!simple) {\n // We have a really bad polygon, try more time consuming methods.\n this.splitPolygon_(list, rtree);\n break;\n } else {\n ccw = !this.isClockwise_(list);\n this.classifyPoints_(list, rtree, ccw);\n }\n }\n }\n }\n }\n }\n if (list.getLength() === 3) {\n let numIndices = this.indices.length;\n this.indices[numIndices++] = list.getPrevItem().p0.i;\n this.indices[numIndices++] = list.getCurrItem().p0.i;\n this.indices[numIndices++] = list.getNextItem().p0.i;\n }\n};\n\n\n/**\n * @private\n * @param {module:ol/structs/LinkedList} list Linked list of the polygon.\n * @param {module:ol/structs/RBush} rtree R-Tree of the polygon.\n * @param {boolean} simple The polygon is simple.\n * @param {boolean} ccw Orientation of the polygon is counter-clockwise.\n * @return {boolean} There were processed ears.\n */\nWebGLPolygonReplay.prototype.clipEars_ = function(list, rtree, simple, ccw) {\n let numIndices = this.indices.length;\n let start = list.firstItem();\n let s0 = list.getPrevItem();\n let s1 = start;\n let s2 = list.nextItem();\n let s3 = list.getNextItem();\n let p0, p1, p2;\n let processedEars = false;\n do {\n p0 = s1.p0;\n p1 = s1.p1;\n p2 = s2.p1;\n if (p1.reflex === false) {\n // We might have a valid ear\n let variableCriterion;\n if (simple) {\n variableCriterion = this.getPointsInTriangle_(p0, p1, p2, rtree, true).length === 0;\n } else {\n variableCriterion = ccw ? this.diagonalIsInside_(s3.p1, p2, p1, p0,\n s0.p0) : this.diagonalIsInside_(s0.p0, p0, p1, p2, s3.p1);\n }\n if ((simple || this.getIntersections_({p0: p0, p1: p2}, rtree).length === 0) &&\n variableCriterion) {\n //The diagonal is completely inside the polygon\n if (simple || p0.reflex === false || p2.reflex === false ||\n linearRingIsClockwise([s0.p0.x, s0.p0.y, p0.x,\n p0.y, p1.x, p1.y, p2.x, p2.y, s3.p1.x, s3.p1.y], 0, 10, 2) === !ccw) {\n //The diagonal is persumably valid, we have an ear\n this.indices[numIndices++] = p0.i;\n this.indices[numIndices++] = p1.i;\n this.indices[numIndices++] = p2.i;\n this.removeItem_(s1, s2, list, rtree);\n if (s2 === start) {\n start = s3;\n }\n processedEars = true;\n }\n }\n }\n // Else we have a reflex point.\n s0 = list.getPrevItem();\n s1 = list.getCurrItem();\n s2 = list.nextItem();\n s3 = list.getNextItem();\n } while (s1 !== start && list.getLength() > 3);\n\n return processedEars;\n};\n\n\n/**\n * @private\n * @param {module:ol/structs/LinkedList} list Linked list of the polygon.\n * @param {module:ol/structs/RBush} rtree R-Tree of the polygon.\n * @param {boolean=} opt_touch Resolve touching segments.\n * @return {boolean} There were resolved intersections.\n*/\nWebGLPolygonReplay.prototype.resolveSelfIntersections_ = function(\n list, rtree, opt_touch) {\n const start = list.firstItem();\n list.nextItem();\n let s0 = start;\n let s1 = list.nextItem();\n let resolvedIntersections = false;\n\n do {\n const intersection = this.calculateIntersection_(s0.p0, s0.p1, s1.p0, s1.p1,\n opt_touch);\n if (intersection) {\n let breakCond = false;\n const numVertices = this.vertices.length;\n let numIndices = this.indices.length;\n const n = numVertices / 2;\n const seg = list.prevItem();\n list.removeItem();\n rtree.remove(seg);\n breakCond = (seg === start);\n let p;\n if (opt_touch) {\n if (intersection[0] === s0.p0.x && intersection[1] === s0.p0.y) {\n list.prevItem();\n p = s0.p0;\n s1.p0 = p;\n rtree.remove(s0);\n breakCond = breakCond || (s0 === start);\n } else {\n p = s1.p1;\n s0.p1 = p;\n rtree.remove(s1);\n breakCond = breakCond || (s1 === start);\n }\n list.removeItem();\n } else {\n p = this.createPoint_(intersection[0], intersection[1], n);\n s0.p1 = p;\n s1.p0 = p;\n rtree.update([Math.min(s0.p0.x, s0.p1.x), Math.min(s0.p0.y, s0.p1.y),\n Math.max(s0.p0.x, s0.p1.x), Math.max(s0.p0.y, s0.p1.y)], s0);\n rtree.update([Math.min(s1.p0.x, s1.p1.x), Math.min(s1.p0.y, s1.p1.y),\n Math.max(s1.p0.x, s1.p1.x), Math.max(s1.p0.y, s1.p1.y)], s1);\n }\n\n this.indices[numIndices++] = seg.p0.i;\n this.indices[numIndices++] = seg.p1.i;\n this.indices[numIndices++] = p.i;\n\n resolvedIntersections = true;\n if (breakCond) {\n break;\n }\n }\n\n s0 = list.getPrevItem();\n s1 = list.nextItem();\n } while (s0 !== start);\n return resolvedIntersections;\n};\n\n\n/**\n * @private\n * @param {module:ol/structs/LinkedList} list Linked list of the polygon.\n * @param {module:ol/structs/RBush} rtree R-Tree of the polygon.\n * @return {boolean} The polygon is simple.\n */\nWebGLPolygonReplay.prototype.isSimple_ = function(list, rtree) {\n const start = list.firstItem();\n let seg = start;\n do {\n if (this.getIntersections_(seg, rtree).length) {\n return false;\n }\n seg = list.nextItem();\n } while (seg !== start);\n return true;\n};\n\n\n/**\n * @private\n * @param {module:ol/structs/LinkedList} list Linked list of the polygon.\n * @return {boolean} Orientation is clockwise.\n */\nWebGLPolygonReplay.prototype.isClockwise_ = function(list) {\n const length = list.getLength() * 2;\n const flatCoordinates = new Array(length);\n const start = list.firstItem();\n let seg = start;\n let i = 0;\n do {\n flatCoordinates[i++] = seg.p0.x;\n flatCoordinates[i++] = seg.p0.y;\n seg = list.nextItem();\n } while (seg !== start);\n return linearRingIsClockwise(flatCoordinates, 0, length, 2);\n};\n\n\n/**\n * @private\n * @param {module:ol/structs/LinkedList} list Linked list of the polygon.\n * @param {module:ol/structs/RBush} rtree R-Tree of the polygon.\n */\nWebGLPolygonReplay.prototype.splitPolygon_ = function(list, rtree) {\n const start = list.firstItem();\n let s0 = start;\n do {\n const intersections = this.getIntersections_(s0, rtree);\n if (intersections.length) {\n const s1 = intersections[0];\n const n = this.vertices.length / 2;\n const intersection = this.calculateIntersection_(s0.p0,\n s0.p1, s1.p0, s1.p1);\n const p = this.createPoint_(intersection[0], intersection[1], n);\n const newPolygon = new LinkedList();\n const newRtree = new RBush();\n this.insertItem_(p, s0.p1, newPolygon, newRtree);\n s0.p1 = p;\n rtree.update([Math.min(s0.p0.x, p.x), Math.min(s0.p0.y, p.y),\n Math.max(s0.p0.x, p.x), Math.max(s0.p0.y, p.y)], s0);\n let currItem = list.nextItem();\n while (currItem !== s1) {\n this.insertItem_(currItem.p0, currItem.p1, newPolygon, newRtree);\n rtree.remove(currItem);\n list.removeItem();\n currItem = list.getCurrItem();\n }\n this.insertItem_(s1.p0, p, newPolygon, newRtree);\n s1.p0 = p;\n rtree.update([Math.min(s1.p1.x, p.x), Math.min(s1.p1.y, p.y),\n Math.max(s1.p1.x, p.x), Math.max(s1.p1.y, p.y)], s1);\n this.classifyPoints_(list, rtree, false);\n this.triangulate_(list, rtree);\n this.classifyPoints_(newPolygon, newRtree, false);\n this.triangulate_(newPolygon, newRtree);\n break;\n }\n s0 = list.nextItem();\n } while (s0 !== start);\n};\n\n\n/**\n * @private\n * @param {number} x X coordinate.\n * @param {number} y Y coordinate.\n * @param {number} i Index.\n * @return {module:ol/render/webgl/PolygonReplay~PolygonVertex} List item.\n */\nWebGLPolygonReplay.prototype.createPoint_ = function(x, y, i) {\n let numVertices = this.vertices.length;\n this.vertices[numVertices++] = x;\n this.vertices[numVertices++] = y;\n /** @type {module:ol/render/webgl/PolygonReplay~PolygonVertex} */\n const p = {\n x: x,\n y: y,\n i: i,\n reflex: undefined\n };\n return p;\n};\n\n\n/**\n * @private\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p0 First point of segment.\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p1 Second point of segment.\n * @param {module:ol/structs/LinkedList} list Polygon ring.\n * @param {module:ol/structs/RBush=} opt_rtree Insert the segment into the R-Tree.\n * @return {module:ol/render/webgl/PolygonReplay~PolygonSegment} segment.\n */\nWebGLPolygonReplay.prototype.insertItem_ = function(p0, p1, list, opt_rtree) {\n const seg = {\n p0: p0,\n p1: p1\n };\n list.insertItem(seg);\n if (opt_rtree) {\n opt_rtree.insert([Math.min(p0.x, p1.x), Math.min(p0.y, p1.y),\n Math.max(p0.x, p1.x), Math.max(p0.y, p1.y)], seg);\n }\n return seg;\n};\n\n\n/**\n * @private\n * @param {module:ol/render/webgl/PolygonReplay~PolygonSegment} s0 Segment before the remove candidate.\n * @param {module:ol/render/webgl/PolygonReplay~PolygonSegment} s1 Remove candidate segment.\n * @param {module:ol/structs/LinkedList} list Polygon ring.\n * @param {module:ol/structs/RBush} rtree R-Tree of the polygon.\n */\nWebGLPolygonReplay.prototype.removeItem_ = function(s0, s1, list, rtree) {\n if (list.getCurrItem() === s1) {\n list.removeItem();\n s0.p1 = s1.p1;\n rtree.remove(s1);\n rtree.update([Math.min(s0.p0.x, s0.p1.x), Math.min(s0.p0.y, s0.p1.y),\n Math.max(s0.p0.x, s0.p1.x), Math.max(s0.p0.y, s0.p1.y)], s0);\n }\n};\n\n\n/**\n * @private\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p0 First point.\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p1 Second point.\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p2 Third point.\n * @param {module:ol/structs/RBush} rtree R-Tree of the polygon.\n * @param {boolean=} opt_reflex Only include reflex points.\n * @return {Array.<module:ol/render/webgl/PolygonReplay~PolygonVertex>} Points in the triangle.\n */\nWebGLPolygonReplay.prototype.getPointsInTriangle_ = function(p0, p1, p2, rtree, opt_reflex) {\n const result = [];\n const segmentsInExtent = rtree.getInExtent([Math.min(p0.x, p1.x, p2.x),\n Math.min(p0.y, p1.y, p2.y), Math.max(p0.x, p1.x, p2.x), Math.max(p0.y,\n p1.y, p2.y)]);\n for (let i = 0, ii = segmentsInExtent.length; i < ii; ++i) {\n for (const j in segmentsInExtent[i]) {\n const p = segmentsInExtent[i][j];\n if (typeof p === 'object' && (!opt_reflex || p.reflex)) {\n if ((p.x !== p0.x || p.y !== p0.y) && (p.x !== p1.x || p.y !== p1.y) &&\n (p.x !== p2.x || p.y !== p2.y) && result.indexOf(p) === -1 &&\n linearRingContainsXY([p0.x, p0.y, p1.x, p1.y, p2.x, p2.y], 0, 6, 2, p.x, p.y)) {\n result.push(p);\n }\n }\n }\n }\n return result;\n};\n\n\n/**\n * @private\n * @param {module:ol/render/webgl/PolygonReplay~PolygonSegment} segment Segment.\n * @param {module:ol/structs/RBush} rtree R-Tree of the polygon.\n * @param {boolean=} opt_touch Touching segments should be considered an intersection.\n * @return {Array.<module:ol/render/webgl/PolygonReplay~PolygonSegment>} Intersecting segments.\n */\nWebGLPolygonReplay.prototype.getIntersections_ = function(segment, rtree, opt_touch) {\n const p0 = segment.p0;\n const p1 = segment.p1;\n const segmentsInExtent = rtree.getInExtent([Math.min(p0.x, p1.x),\n Math.min(p0.y, p1.y), Math.max(p0.x, p1.x), Math.max(p0.y, p1.y)]);\n const result = [];\n for (let i = 0, ii = segmentsInExtent.length; i < ii; ++i) {\n const currSeg = segmentsInExtent[i];\n if (segment !== currSeg && (opt_touch || currSeg.p0 !== p1 || currSeg.p1 !== p0) &&\n this.calculateIntersection_(p0, p1, currSeg.p0, currSeg.p1, opt_touch)) {\n result.push(currSeg);\n }\n }\n return result;\n};\n\n\n/**\n * Line intersection algorithm by Paul Bourke.\n * @see http://paulbourke.net/geometry/pointlineplane/\n *\n * @private\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p0 First point.\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p1 Second point.\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p2 Third point.\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p3 Fourth point.\n * @param {boolean=} opt_touch Touching segments should be considered an intersection.\n * @return {Array.<number>|undefined} Intersection coordinates.\n */\nWebGLPolygonReplay.prototype.calculateIntersection_ = function(p0, p1, p2, p3, opt_touch) {\n const denom = (p3.y - p2.y) * (p1.x - p0.x) - (p3.x - p2.x) * (p1.y - p0.y);\n if (denom !== 0) {\n const ua = ((p3.x - p2.x) * (p0.y - p2.y) - (p3.y - p2.y) * (p0.x - p2.x)) / denom;\n const ub = ((p1.x - p0.x) * (p0.y - p2.y) - (p1.y - p0.y) * (p0.x - p2.x)) / denom;\n if ((!opt_touch && ua > EPSILON && ua < 1 - EPSILON &&\n ub > EPSILON && ub < 1 - EPSILON) || (opt_touch &&\n ua >= 0 && ua <= 1 && ub >= 0 && ub <= 1)) {\n return [p0.x + ua * (p1.x - p0.x), p0.y + ua * (p1.y - p0.y)];\n }\n }\n return undefined;\n};\n\n\n/**\n * @private\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p0 Point before the start of the diagonal.\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p1 Start point of the diagonal.\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p2 Ear candidate.\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p3 End point of the diagonal.\n * @param {module:ol/render/webgl/PolygonReplay~PolygonVertex} p4 Point after the end of the diagonal.\n * @return {boolean} Diagonal is inside the polygon.\n */\nWebGLPolygonReplay.prototype.diagonalIsInside_ = function(p0, p1, p2, p3, p4) {\n if (p1.reflex === undefined || p3.reflex === undefined) {\n return false;\n }\n const p1IsLeftOf = (p2.x - p3.x) * (p1.y - p3.y) > (p2.y - p3.y) * (p1.x - p3.x);\n const p1IsRightOf = (p4.x - p3.x) * (p1.y - p3.y) < (p4.y - p3.y) * (p1.x - p3.x);\n const p3IsLeftOf = (p0.x - p1.x) * (p3.y - p1.y) > (p0.y - p1.y) * (p3.x - p1.x);\n const p3IsRightOf = (p2.x - p1.x) * (p3.y - p1.y) < (p2.y - p1.y) * (p3.x - p1.x);\n const p1InCone = p3.reflex ? p1IsRightOf || p1IsLeftOf : p1IsRightOf && p1IsLeftOf;\n const p3InCone = p1.reflex ? p3IsRightOf || p3IsLeftOf : p3IsRightOf && p3IsLeftOf;\n return p1InCone && p3InCone;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLPolygonReplay.prototype.drawMultiPolygon = function(multiPolygonGeometry, feature) {\n const endss = multiPolygonGeometry.getEndss();\n const stride = multiPolygonGeometry.getStride();\n const currIndex = this.indices.length;\n const currLineIndex = this.lineStringReplay.getCurrentIndex();\n const flatCoordinates = multiPolygonGeometry.getFlatCoordinates();\n let i, ii, j, jj;\n let start = 0;\n for (i = 0, ii = endss.length; i < ii; ++i) {\n const ends = endss[i];\n if (ends.length > 0) {\n const outerRing = translate(flatCoordinates, start, ends[0],\n stride, -this.origin[0], -this.origin[1]);\n if (outerRing.length) {\n const holes = [];\n let holeFlatCoords;\n for (j = 1, jj = ends.length; j < jj; ++j) {\n if (ends[j] !== ends[j - 1]) {\n holeFlatCoords = translate(flatCoordinates, ends[j - 1],\n ends[j], stride, -this.origin[0], -this.origin[1]);\n holes.push(holeFlatCoords);\n }\n }\n this.lineStringReplay.drawPolygonCoordinates(outerRing, holes, stride);\n this.drawCoordinates_(outerRing, holes, stride);\n }\n }\n start = ends[ends.length - 1];\n }\n if (this.indices.length > currIndex) {\n this.startIndices.push(currIndex);\n this.startIndicesFeature.push(feature);\n if (this.state_.changed) {\n this.styleIndices_.push(currIndex);\n this.state_.changed = false;\n }\n }\n if (this.lineStringReplay.getCurrentIndex() > currLineIndex) {\n this.lineStringReplay.setPolygonStyle(feature, currLineIndex);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLPolygonReplay.prototype.drawPolygon = function(polygonGeometry, feature) {\n const ends = polygonGeometry.getEnds();\n const stride = polygonGeometry.getStride();\n if (ends.length > 0) {\n const flatCoordinates = polygonGeometry.getFlatCoordinates().map(Number);\n const outerRing = translate(flatCoordinates, 0, ends[0],\n stride, -this.origin[0], -this.origin[1]);\n if (outerRing.length) {\n const holes = [];\n let i, ii, holeFlatCoords;\n for (i = 1, ii = ends.length; i < ii; ++i) {\n if (ends[i] !== ends[i - 1]) {\n holeFlatCoords = translate(flatCoordinates, ends[i - 1],\n ends[i], stride, -this.origin[0], -this.origin[1]);\n holes.push(holeFlatCoords);\n }\n }\n\n this.startIndices.push(this.indices.length);\n this.startIndicesFeature.push(feature);\n if (this.state_.changed) {\n this.styleIndices_.push(this.indices.length);\n this.state_.changed = false;\n }\n this.lineStringReplay.setPolygonStyle(feature);\n\n this.lineStringReplay.drawPolygonCoordinates(outerRing, holes, stride);\n this.drawCoordinates_(outerRing, holes, stride);\n }\n }\n};\n\n\n/**\n * @inheritDoc\n **/\nWebGLPolygonReplay.prototype.finish = function(context) {\n // create, bind, and populate the vertices buffer\n this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n // create, bind, and populate the indices buffer\n this.indicesBuffer = new WebGLBuffer(this.indices);\n\n this.startIndices.push(this.indices.length);\n\n this.lineStringReplay.finish(context);\n\n //Clean up, if there is nothing to draw\n if (this.styleIndices_.length === 0 && this.styles_.length > 0) {\n this.styles_ = [];\n }\n\n this.vertices = null;\n this.indices = null;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLPolygonReplay.prototype.getDeleteResourcesFunction = function(context) {\n const verticesBuffer = this.verticesBuffer;\n const indicesBuffer = this.indicesBuffer;\n const lineDeleter = this.lineStringReplay.getDeleteResourcesFunction(context);\n return function() {\n context.deleteBuffer(verticesBuffer);\n context.deleteBuffer(indicesBuffer);\n lineDeleter();\n };\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLPolygonReplay.prototype.setUpProgram = function(gl, context, size, pixelRatio) {\n // get the program\n const program = context.getProgram(fragment, vertex);\n\n // get the locations\n let locations;\n if (!this.defaultLocations_) {\n locations = new Locations(gl, program);\n this.defaultLocations_ = locations;\n } else {\n locations = this.defaultLocations_;\n }\n\n context.useProgram(program);\n\n // enable the vertex attrib arrays\n gl.enableVertexAttribArray(locations.a_position);\n gl.vertexAttribPointer(locations.a_position, 2, FLOAT,\n false, 8, 0);\n\n return locations;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLPolygonReplay.prototype.shutDownProgram = function(gl, locations) {\n gl.disableVertexAttribArray(locations.a_position);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLPolygonReplay.prototype.drawReplay = function(gl, context, skippedFeaturesHash, hitDetection) {\n //Save GL parameters.\n const tmpDepthFunc = /** @type {number} */ (gl.getParameter(gl.DEPTH_FUNC));\n const tmpDepthMask = /** @type {boolean} */ (gl.getParameter(gl.DEPTH_WRITEMASK));\n\n if (!hitDetection) {\n gl.enable(gl.DEPTH_TEST);\n gl.depthMask(true);\n gl.depthFunc(gl.NOTEQUAL);\n }\n\n if (!isEmpty(skippedFeaturesHash)) {\n this.drawReplaySkipping_(gl, context, skippedFeaturesHash);\n } else {\n //Draw by style groups to minimize drawElements() calls.\n let i, start, end, nextStyle;\n end = this.startIndices[this.startIndices.length - 1];\n for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n start = this.styleIndices_[i];\n nextStyle = this.styles_[i];\n this.setFillStyle_(gl, nextStyle);\n this.drawElements(gl, context, start, end);\n end = start;\n }\n }\n if (!hitDetection) {\n gl.disable(gl.DEPTH_TEST);\n gl.clear(gl.DEPTH_BUFFER_BIT);\n //Restore GL parameters.\n gl.depthMask(tmpDepthMask);\n gl.depthFunc(tmpDepthFunc);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLPolygonReplay.prototype.drawHitDetectionReplayOneByOne = function(gl, context, skippedFeaturesHash,\n featureCallback, opt_hitExtent) {\n let i, start, end, nextStyle, groupStart, feature, featureUid, featureIndex;\n featureIndex = this.startIndices.length - 2;\n end = this.startIndices[featureIndex + 1];\n for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n nextStyle = this.styles_[i];\n this.setFillStyle_(gl, nextStyle);\n groupStart = this.styleIndices_[i];\n\n while (featureIndex >= 0 &&\n this.startIndices[featureIndex] >= groupStart) {\n start = this.startIndices[featureIndex];\n feature = this.startIndicesFeature[featureIndex];\n featureUid = getUid(feature).toString();\n\n if (skippedFeaturesHash[featureUid] === undefined &&\n feature.getGeometry() &&\n (opt_hitExtent === undefined || intersects(\n /** @type {Array<number>} */ (opt_hitExtent),\n feature.getGeometry().getExtent()))) {\n gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);\n this.drawElements(gl, context, start, end);\n\n const result = featureCallback(feature);\n\n if (result) {\n return result;\n }\n\n }\n featureIndex--;\n end = start;\n }\n }\n return undefined;\n};\n\n\n/**\n * @private\n * @param {WebGLRenderingContext} gl gl.\n * @param {module:ol/webgl/Context} context Context.\n * @param {Object} skippedFeaturesHash Ids of features to skip.\n */\nWebGLPolygonReplay.prototype.drawReplaySkipping_ = function(gl, context, skippedFeaturesHash) {\n let i, start, end, nextStyle, groupStart, feature, featureUid, featureIndex, featureStart;\n featureIndex = this.startIndices.length - 2;\n end = start = this.startIndices[featureIndex + 1];\n for (i = this.styleIndices_.length - 1; i >= 0; --i) {\n nextStyle = this.styles_[i];\n this.setFillStyle_(gl, nextStyle);\n groupStart = this.styleIndices_[i];\n\n while (featureIndex >= 0 &&\n this.startIndices[featureIndex] >= groupStart) {\n featureStart = this.startIndices[featureIndex];\n feature = this.startIndicesFeature[featureIndex];\n featureUid = getUid(feature).toString();\n\n if (skippedFeaturesHash[featureUid]) {\n if (start !== end) {\n this.drawElements(gl, context, start, end);\n gl.clear(gl.DEPTH_BUFFER_BIT);\n }\n end = featureStart;\n }\n featureIndex--;\n start = featureStart;\n }\n if (start !== end) {\n this.drawElements(gl, context, start, end);\n gl.clear(gl.DEPTH_BUFFER_BIT);\n }\n start = end = groupStart;\n }\n};\n\n\n/**\n * @private\n * @param {WebGLRenderingContext} gl gl.\n * @param {Array.<number>} color Color.\n */\nWebGLPolygonReplay.prototype.setFillStyle_ = function(gl, color) {\n gl.uniform4fv(this.defaultLocations_.u_color, color);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLPolygonReplay.prototype.setFillStrokeStyle = function(fillStyle, strokeStyle) {\n let fillStyleColor = fillStyle ? fillStyle.getColor() : [0, 0, 0, 0];\n if (!(fillStyleColor instanceof CanvasGradient) &&\n !(fillStyleColor instanceof CanvasPattern)) {\n fillStyleColor = asArray(fillStyleColor).map(function(c, i) {\n return i != 3 ? c / 255 : c;\n }) || DEFAULT_FILLSTYLE;\n } else {\n fillStyleColor = DEFAULT_FILLSTYLE;\n }\n if (!this.state_.fillColor || !equals(fillStyleColor, this.state_.fillColor)) {\n this.state_.fillColor = fillStyleColor;\n this.state_.changed = true;\n this.styles_.push(fillStyleColor);\n }\n //Provide a null stroke style, if no strokeStyle is provided. Required for the draw interaction to work.\n if (strokeStyle) {\n this.lineStringReplay.setFillStrokeStyle(null, strokeStyle);\n } else {\n const nullStrokeStyle = new Stroke({\n color: [0, 0, 0, 0],\n lineWidth: 0\n });\n this.lineStringReplay.setFillStrokeStyle(null, nullStrokeStyle);\n }\n};\nexport default WebGLPolygonReplay;\n","/**\n * @module ol/style/Atlas\n */\nimport {createCanvasContext2D} from '../dom.js';\n\n\n/**\n * @typedef {Object} AtlasBlock\n * @property {number} x\n * @property {number} y\n * @property {number} width\n * @property {number} height\n */\n\n/**\n * Provides information for an image inside an atlas.\n * `offsetX` and `offsetY` are the position of the image inside the atlas image `image`.\n * @typedef {Object} AtlasInfo\n * @property {number} offsetX\n * @property {number} offsetY\n * @property {HTMLCanvasElement} image\n */\n\n/**\n * This class facilitates the creation of image atlases.\n *\n * Images added to an atlas will be rendered onto a single\n * atlas canvas. The distribution of images on the canvas is\n * managed with the bin packing algorithm described in:\n * http://www.blackpawn.com/texts/lightmaps/\n *\n * @constructor\n * @struct\n * @param {number} size The size in pixels of the sprite image.\n * @param {number} space The space in pixels between images.\n * Because texture coordinates are float values, the edges of\n * images might not be completely correct (in a way that the\n * edges overlap when being rendered). To avoid this we add a\n * padding around each image.\n */\nconst Atlas = function(size, space) {\n\n /**\n * @private\n * @type {number}\n */\n this.space_ = space;\n\n /**\n * @private\n * @type {Array.<module:ol/style/Atlas~AtlasBlock>}\n */\n this.emptyBlocks_ = [{x: 0, y: 0, width: size, height: size}];\n\n /**\n * @private\n * @type {Object.<string, module:ol/style/Atlas~AtlasInfo>}\n */\n this.entries_ = {};\n\n /**\n * @private\n * @type {CanvasRenderingContext2D}\n */\n this.context_ = createCanvasContext2D(size, size);\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = this.context_.canvas;\n};\n\n\n/**\n * @param {string} id The identifier of the entry to check.\n * @return {?module:ol/style/Atlas~AtlasInfo} The atlas info.\n */\nAtlas.prototype.get = function(id) {\n return this.entries_[id] || null;\n};\n\n\n/**\n * @param {string} id The identifier of the entry to add.\n * @param {number} width The width.\n * @param {number} height The height.\n * @param {function(CanvasRenderingContext2D, number, number)} renderCallback\n * Called to render the new image onto an atlas image.\n * @param {Object=} opt_this Value to use as `this` when executing\n * `renderCallback`.\n * @return {?module:ol/style/Atlas~AtlasInfo} The position and atlas image for the entry.\n */\nAtlas.prototype.add = function(id, width, height, renderCallback, opt_this) {\n for (let i = 0, ii = this.emptyBlocks_.length; i < ii; ++i) {\n const block = this.emptyBlocks_[i];\n if (block.width >= width + this.space_ &&\n block.height >= height + this.space_) {\n // we found a block that is big enough for our entry\n const entry = {\n offsetX: block.x + this.space_,\n offsetY: block.y + this.space_,\n image: this.canvas_\n };\n this.entries_[id] = entry;\n\n // render the image on the atlas image\n renderCallback.call(opt_this, this.context_,\n block.x + this.space_, block.y + this.space_);\n\n // split the block after the insertion, either horizontally or vertically\n this.split_(i, block, width + this.space_, height + this.space_);\n\n return entry;\n }\n }\n\n // there is no space for the new entry in this atlas\n return null;\n};\n\n\n/**\n * @private\n * @param {number} index The index of the block.\n * @param {module:ol/style/Atlas~AtlasBlock} block The block to split.\n * @param {number} width The width of the entry to insert.\n * @param {number} height The height of the entry to insert.\n */\nAtlas.prototype.split_ = function(index, block, width, height) {\n const deltaWidth = block.width - width;\n const deltaHeight = block.height - height;\n\n /** @type {module:ol/style/Atlas~AtlasBlock} */\n let newBlock1;\n /** @type {module:ol/style/Atlas~AtlasBlock} */\n let newBlock2;\n\n if (deltaWidth > deltaHeight) {\n // split vertically\n // block right of the inserted entry\n newBlock1 = {\n x: block.x + width,\n y: block.y,\n width: block.width - width,\n height: block.height\n };\n\n // block below the inserted entry\n newBlock2 = {\n x: block.x,\n y: block.y + height,\n width: width,\n height: block.height - height\n };\n this.updateBlocks_(index, newBlock1, newBlock2);\n } else {\n // split horizontally\n // block right of the inserted entry\n newBlock1 = {\n x: block.x + width,\n y: block.y,\n width: block.width - width,\n height: height\n };\n\n // block below the inserted entry\n newBlock2 = {\n x: block.x,\n y: block.y + height,\n width: block.width,\n height: block.height - height\n };\n this.updateBlocks_(index, newBlock1, newBlock2);\n }\n};\n\n\n/**\n * Remove the old block and insert new blocks at the same array position.\n * The new blocks are inserted at the same position, so that splitted\n * blocks (that are potentially smaller) are filled first.\n * @private\n * @param {number} index The index of the block to remove.\n * @param {module:ol/style/Atlas~AtlasBlock} newBlock1 The 1st block to add.\n * @param {module:ol/style/Atlas~AtlasBlock} newBlock2 The 2nd block to add.\n */\nAtlas.prototype.updateBlocks_ = function(index, newBlock1, newBlock2) {\n const args = [index, 1];\n if (newBlock1.width > 0 && newBlock1.height > 0) {\n args.push(newBlock1);\n }\n if (newBlock2.width > 0 && newBlock2.height > 0) {\n args.push(newBlock2);\n }\n this.emptyBlocks_.splice.apply(this.emptyBlocks_, args);\n};\nexport default Atlas;\n","/**\n * @module ol/style/AtlasManager\n */\nimport {MAX_TEXTURE_SIZE as WEBGL_MAX_TEXTURE_SIZE} from '../webgl.js';\nimport {UNDEFINED} from '../functions.js';\nimport Atlas from '../style/Atlas.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [initialSize=256] The size in pixels of the first atlas image.\n * @property {number} [maxSize] The maximum size in pixels of atlas images. Default is\n * `webgl/MAX_TEXTURE_SIZE` or 2048 if WebGL is not supported.\n * @property {number} [space=1] The space in pixels between images.\n */\n\n\n/**\n * Provides information for an image inside an atlas manager.\n * `offsetX` and `offsetY` is the position of the image inside\n * the atlas image `image` and the position of the hit-detection image\n * inside the hit-detection atlas image `hitImage`.\n * @typedef {Object} AtlasManagerInfo\n * @property {number} offsetX\n * @property {number} offsetY\n * @property {HTMLCanvasElement} image\n * @property {HTMLCanvasElement} hitImage\n */\n\n\n/**\n * The size in pixels of the first atlas image.\n * @type {number}\n */\nconst INITIAL_ATLAS_SIZE = 256;\n\n/**\n * The maximum size in pixels of atlas images.\n * @type {number}\n */\nconst MAX_ATLAS_SIZE = -1;\n\n\n/**\n * Manages the creation of image atlases.\n *\n * Images added to this manager will be inserted into an atlas, which\n * will be used for rendering.\n * The `size` given in the constructor is the size for the first\n * atlas. After that, when new atlases are created, they will have\n * twice the size as the latest atlas (until `maxSize` is reached).\n *\n * If an application uses many images or very large images, it is recommended\n * to set a higher `size` value to avoid the creation of too many atlases.\n *\n * @constructor\n * @struct\n * @api\n * @param {module:ol/style/AtlasManager~Options=} opt_options Options.\n */\nconst AtlasManager = function(opt_options) {\n\n const options = opt_options || {};\n\n /**\n * The size in pixels of the latest atlas image.\n * @private\n * @type {number}\n */\n this.currentSize_ = options.initialSize !== undefined ?\n options.initialSize : INITIAL_ATLAS_SIZE;\n\n /**\n * The maximum size in pixels of atlas images.\n * @private\n * @type {number}\n */\n this.maxSize_ = options.maxSize !== undefined ?\n options.maxSize : MAX_ATLAS_SIZE != -1 ?\n MAX_ATLAS_SIZE : WEBGL_MAX_TEXTURE_SIZE !== undefined ?\n WEBGL_MAX_TEXTURE_SIZE : 2048;\n\n /**\n * The size in pixels between images.\n * @private\n * @type {number}\n */\n this.space_ = options.space !== undefined ? options.space : 1;\n\n /**\n * @private\n * @type {Array.<module:ol/style/Atlas>}\n */\n this.atlases_ = [new Atlas(this.currentSize_, this.space_)];\n\n /**\n * The size in pixels of the latest atlas image for hit-detection images.\n * @private\n * @type {number}\n */\n this.currentHitSize_ = this.currentSize_;\n\n /**\n * @private\n * @type {Array.<module:ol/style/Atlas>}\n */\n this.hitAtlases_ = [new Atlas(this.currentHitSize_, this.space_)];\n};\n\n\n/**\n * @param {string} id The identifier of the entry to check.\n * @return {?module:ol/style/AtlasManager~AtlasManagerInfo} The position and atlas image for the\n * entry, or `null` if the entry is not part of the atlas manager.\n */\nAtlasManager.prototype.getInfo = function(id) {\n /** @type {?module:ol/style/Atlas~AtlasInfo} */\n const info = this.getInfo_(this.atlases_, id);\n\n if (!info) {\n return null;\n }\n const hitInfo = /** @type {module:ol/style/Atlas~AtlasInfo} */ (this.getInfo_(this.hitAtlases_, id));\n\n return this.mergeInfos_(info, hitInfo);\n};\n\n\n/**\n * @private\n * @param {Array.<module:ol/style/Atlas>} atlases The atlases to search.\n * @param {string} id The identifier of the entry to check.\n * @return {?module:ol/style/Atlas~AtlasInfo} The position and atlas image for the entry,\n * or `null` if the entry is not part of the atlases.\n */\nAtlasManager.prototype.getInfo_ = function(atlases, id) {\n for (let i = 0, ii = atlases.length; i < ii; ++i) {\n const atlas = atlases[i];\n const info = atlas.get(id);\n if (info) {\n return info;\n }\n }\n return null;\n};\n\n\n/**\n * @private\n * @param {module:ol/style/Atlas~AtlasInfo} info The info for the real image.\n * @param {module:ol/style/Atlas~AtlasInfo} hitInfo The info for the hit-detection\n * image.\n * @return {?module:ol/style/AtlasManager~AtlasManagerInfo} The position and atlas image for the\n * entry, or `null` if the entry is not part of the atlases.\n */\nAtlasManager.prototype.mergeInfos_ = function(info, hitInfo) {\n return (\n /** @type {module:ol/style/AtlasManager~AtlasManagerInfo} */ ({\n offsetX: info.offsetX,\n offsetY: info.offsetY,\n image: info.image,\n hitImage: hitInfo.image\n })\n );\n};\n\n\n/**\n * Add an image to the atlas manager.\n *\n * If an entry for the given id already exists, the entry will\n * be overridden (but the space on the atlas graphic will not be freed).\n *\n * If `renderHitCallback` is provided, the image (or the hit-detection version\n * of the image) will be rendered into a separate hit-detection atlas image.\n *\n * @param {string} id The identifier of the entry to add.\n * @param {number} width The width.\n * @param {number} height The height.\n * @param {function(CanvasRenderingContext2D, number, number)} renderCallback\n * Called to render the new image onto an atlas image.\n * @param {function(CanvasRenderingContext2D, number, number)=}\n * opt_renderHitCallback Called to render a hit-detection image onto a hit\n * detection atlas image.\n * @param {Object=} opt_this Value to use as `this` when executing\n * `renderCallback` and `renderHitCallback`.\n * @return {?module:ol/style/AtlasManager~AtlasManagerInfo} The position and atlas image for the\n * entry, or `null` if the image is too big.\n */\nAtlasManager.prototype.add = function(id, width, height,\n renderCallback, opt_renderHitCallback, opt_this) {\n if (width + this.space_ > this.maxSize_ ||\n height + this.space_ > this.maxSize_) {\n return null;\n }\n\n /** @type {?module:ol/style/Atlas~AtlasInfo} */\n const info = this.add_(false, id, width, height, renderCallback, opt_this);\n if (!info) {\n return null;\n }\n\n // even if no hit-detection entry is requested, we insert a fake entry into\n // the hit-detection atlas, to make sure that the offset is the same for\n // the original image and the hit-detection image.\n const renderHitCallback = opt_renderHitCallback !== undefined ?\n opt_renderHitCallback : UNDEFINED;\n\n const hitInfo = /** @type {module:ol/style/Atlas~AtlasInfo} */ (this.add_(true,\n id, width, height, renderHitCallback, opt_this));\n\n return this.mergeInfos_(info, hitInfo);\n};\n\n\n/**\n * @private\n * @param {boolean} isHitAtlas If the hit-detection atlases are used.\n * @param {string} id The identifier of the entry to add.\n * @param {number} width The width.\n * @param {number} height The height.\n * @param {function(CanvasRenderingContext2D, number, number)} renderCallback\n * Called to render the new image onto an atlas image.\n * @param {Object=} opt_this Value to use as `this` when executing\n * `renderCallback` and `renderHitCallback`.\n * @return {?module:ol/style/Atlas~AtlasInfo} The position and atlas image for the entry,\n * or `null` if the image is too big.\n */\nAtlasManager.prototype.add_ = function(isHitAtlas, id, width, height, renderCallback, opt_this) {\n const atlases = (isHitAtlas) ? this.hitAtlases_ : this.atlases_;\n let atlas, info, i, ii;\n for (i = 0, ii = atlases.length; i < ii; ++i) {\n atlas = atlases[i];\n info = atlas.add(id, width, height, renderCallback, opt_this);\n if (info) {\n return info;\n } else if (!info && i === ii - 1) {\n // the entry could not be added to one of the existing atlases,\n // create a new atlas that is twice as big and try to add to this one.\n let size;\n if (isHitAtlas) {\n size = Math.min(this.currentHitSize_ * 2, this.maxSize_);\n this.currentHitSize_ = size;\n } else {\n size = Math.min(this.currentSize_ * 2, this.maxSize_);\n this.currentSize_ = size;\n }\n atlas = new Atlas(size, this.space_);\n atlases.push(atlas);\n // run the loop another time\n ++ii;\n }\n }\n return null;\n};\nexport default AtlasManager;\n","/**\n * @module ol/render/webgl/TextReplay\n */\nimport {getUid, inherits} from '../../util.js';\nimport {asColorLike} from '../../colorlike.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport {CANVAS_LINE_DASH} from '../../has.js';\nimport {TEXT_ALIGN} from '../replay.js';\nimport {DEFAULT_FILLSTYLE, DEFAULT_FONT, DEFAULT_LINECAP, DEFAULT_LINEDASH,\n DEFAULT_LINEDASHOFFSET, DEFAULT_LINEJOIN, DEFAULT_LINEWIDTH, DEFAULT_MITERLIMIT,\n DEFAULT_STROKESTYLE, DEFAULT_TEXTALIGN, DEFAULT_TEXTBASELINE} from '../webgl.js';\nimport WebGLTextureReplay from '../webgl/TextureReplay.js';\nimport AtlasManager from '../../style/AtlasManager.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n/**\n * @typedef {Object} GlyphAtlas\n * @property {module:ol/style/AtlasManager} atlas\n * @property {Object.<string, number>} width\n * @property {number} height\n */\n\n\n/**\n * @constructor\n * @extends {module:ol/render/webgl/TextureReplay}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Max extent.\n * @struct\n */\nconst WebGLTextReplay = function(tolerance, maxExtent) {\n WebGLTextureReplay.call(this, tolerance, maxExtent);\n\n /**\n * @private\n * @type {Array.<HTMLCanvasElement>}\n */\n this.images_ = [];\n\n /**\n * @private\n * @type {Array.<WebGLTexture>}\n */\n this.textures_ = [];\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.measureCanvas_ = createCanvasContext2D(0, 0).canvas;\n\n /**\n * @private\n * @type {{strokeColor: (module:ol/colorlike~ColorLike|null),\n * lineCap: (string|undefined),\n * lineDash: Array.<number>,\n * lineDashOffset: (number|undefined),\n * lineJoin: (string|undefined),\n * lineWidth: number,\n * miterLimit: (number|undefined),\n * fillColor: (module:ol/colorlike~ColorLike|null),\n * font: (string|undefined),\n * scale: (number|undefined)}}\n */\n this.state_ = {\n strokeColor: null,\n lineCap: undefined,\n lineDash: null,\n lineDashOffset: undefined,\n lineJoin: undefined,\n lineWidth: 0,\n miterLimit: undefined,\n fillColor: null,\n font: undefined,\n scale: undefined\n };\n\n /**\n * @private\n * @type {string}\n */\n this.text_ = '';\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.textAlign_ = undefined;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.textBaseline_ = undefined;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.offsetX_ = undefined;\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.offsetY_ = undefined;\n\n /**\n * @private\n * @type {Object.<string, module:ol/render/webgl/TextReplay~GlyphAtlas>}\n */\n this.atlases_ = {};\n\n /**\n * @private\n * @type {module:ol/render/webgl/TextReplay~GlyphAtlas|undefined}\n */\n this.currAtlas_ = undefined;\n\n this.scale = 1;\n\n this.opacity = 1;\n\n};\n\ninherits(WebGLTextReplay, WebGLTextureReplay);\n\n\n/**\n * @inheritDoc\n */\nWebGLTextReplay.prototype.drawText = function(geometry, feature) {\n if (this.text_) {\n let flatCoordinates = null;\n const offset = 0;\n let end = 2;\n let stride = 2;\n switch (geometry.getType()) {\n case GeometryType.POINT:\n case GeometryType.MULTI_POINT:\n flatCoordinates = geometry.getFlatCoordinates();\n end = flatCoordinates.length;\n stride = geometry.getStride();\n break;\n case GeometryType.CIRCLE:\n flatCoordinates = /** @type {module:ol/geom/Circle} */ (geometry).getCenter();\n break;\n case GeometryType.LINE_STRING:\n flatCoordinates = /** @type {module:ol/geom/LineString} */ (geometry).getFlatMidpoint();\n break;\n case GeometryType.MULTI_LINE_STRING:\n flatCoordinates = /** @type {module:ol/geom/MultiLineString} */ (geometry).getFlatMidpoints();\n end = flatCoordinates.length;\n break;\n case GeometryType.POLYGON:\n flatCoordinates = /** @type {module:ol/geom/Polygon} */ (geometry).getFlatInteriorPoint();\n break;\n case GeometryType.MULTI_POLYGON:\n flatCoordinates = /** @type {module:ol/geom/MultiPolygon} */ (geometry).getFlatInteriorPoints();\n end = flatCoordinates.length;\n break;\n default:\n }\n this.startIndices.push(this.indices.length);\n this.startIndicesFeature.push(feature);\n\n const glyphAtlas = this.currAtlas_;\n const lines = this.text_.split('\\n');\n const textSize = this.getTextSize_(lines);\n let i, ii, j, jj, currX, currY, charArr, charInfo;\n const anchorX = Math.round(textSize[0] * this.textAlign_ - this.offsetX_);\n const anchorY = Math.round(textSize[1] * this.textBaseline_ - this.offsetY_);\n const lineWidth = (this.state_.lineWidth / 2) * this.state_.scale;\n\n for (i = 0, ii = lines.length; i < ii; ++i) {\n currX = 0;\n currY = glyphAtlas.height * i;\n charArr = lines[i].split('');\n\n for (j = 0, jj = charArr.length; j < jj; ++j) {\n charInfo = glyphAtlas.atlas.getInfo(charArr[j]);\n\n if (charInfo) {\n const image = charInfo.image;\n\n this.anchorX = anchorX - currX;\n this.anchorY = anchorY - currY;\n this.originX = j === 0 ? charInfo.offsetX - lineWidth : charInfo.offsetX;\n this.originY = charInfo.offsetY;\n this.height = glyphAtlas.height;\n this.width = j === 0 || j === charArr.length - 1 ?\n glyphAtlas.width[charArr[j]] + lineWidth : glyphAtlas.width[charArr[j]];\n this.imageHeight = image.height;\n this.imageWidth = image.width;\n\n if (this.images_.length === 0) {\n this.images_.push(image);\n } else {\n const currentImage = this.images_[this.images_.length - 1];\n if (getUid(currentImage) != getUid(image)) {\n this.groupIndices.push(this.indices.length);\n this.images_.push(image);\n }\n }\n\n this.drawText_(flatCoordinates, offset, end, stride);\n }\n currX += this.width;\n }\n }\n }\n};\n\n\n/**\n * @private\n * @param {Array.<string>} lines Label to draw split to lines.\n * @return {Array.<number>} Size of the label in pixels.\n */\nWebGLTextReplay.prototype.getTextSize_ = function(lines) {\n const self = this;\n const glyphAtlas = this.currAtlas_;\n const textHeight = lines.length * glyphAtlas.height;\n //Split every line to an array of chars, sum up their width, and select the longest.\n const textWidth = lines.map(function(str) {\n let sum = 0;\n for (let i = 0, ii = str.length; i < ii; ++i) {\n const curr = str[i];\n if (!glyphAtlas.width[curr]) {\n self.addCharToAtlas_(curr);\n }\n sum += glyphAtlas.width[curr] ? glyphAtlas.width[curr] : 0;\n }\n return sum;\n }).reduce(function(max, curr) {\n return Math.max(max, curr);\n });\n\n return [textWidth, textHeight];\n};\n\n\n/**\n * @private\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n */\nWebGLTextReplay.prototype.drawText_ = function(flatCoordinates, offset, end, stride) {\n for (let i = offset, ii = end; i < ii; i += stride) {\n this.drawCoordinates(flatCoordinates, offset, end, stride);\n }\n};\n\n\n/**\n * @private\n * @param {string} char Character.\n */\nWebGLTextReplay.prototype.addCharToAtlas_ = function(char) {\n if (char.length === 1) {\n const glyphAtlas = this.currAtlas_;\n const state = this.state_;\n const mCtx = this.measureCanvas_.getContext('2d');\n mCtx.font = state.font;\n const width = Math.ceil(mCtx.measureText(char).width * state.scale);\n\n const info = glyphAtlas.atlas.add(char, width, glyphAtlas.height,\n function(ctx, x, y) {\n //Parameterize the canvas\n ctx.font = /** @type {string} */ (state.font);\n ctx.fillStyle = state.fillColor;\n ctx.strokeStyle = state.strokeColor;\n ctx.lineWidth = state.lineWidth;\n ctx.lineCap = /*** @type {string} */ (state.lineCap);\n ctx.lineJoin = /** @type {string} */ (state.lineJoin);\n ctx.miterLimit = /** @type {number} */ (state.miterLimit);\n ctx.textAlign = 'left';\n ctx.textBaseline = 'top';\n if (CANVAS_LINE_DASH && state.lineDash) {\n //FIXME: use pixelRatio\n ctx.setLineDash(state.lineDash);\n ctx.lineDashOffset = /** @type {number} */ (state.lineDashOffset);\n }\n if (state.scale !== 1) {\n //FIXME: use pixelRatio\n ctx.setTransform(/** @type {number} */ (state.scale), 0, 0,\n /** @type {number} */ (state.scale), 0, 0);\n }\n\n //Draw the character on the canvas\n if (state.strokeColor) {\n ctx.strokeText(char, x, y);\n }\n if (state.fillColor) {\n ctx.fillText(char, x, y);\n }\n });\n\n if (info) {\n glyphAtlas.width[char] = width;\n }\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTextReplay.prototype.finish = function(context) {\n const gl = context.getGL();\n\n this.groupIndices.push(this.indices.length);\n this.hitDetectionGroupIndices = this.groupIndices;\n\n // create, bind, and populate the vertices buffer\n this.verticesBuffer = new WebGLBuffer(this.vertices);\n\n // create, bind, and populate the indices buffer\n this.indicesBuffer = new WebGLBuffer(this.indices);\n\n // create textures\n /** @type {Object.<string, WebGLTexture>} */\n const texturePerImage = {};\n\n this.createTextures(this.textures_, this.images_, texturePerImage, gl);\n\n this.state_ = {\n strokeColor: null,\n lineCap: undefined,\n lineDash: null,\n lineDashOffset: undefined,\n lineJoin: undefined,\n lineWidth: 0,\n miterLimit: undefined,\n fillColor: null,\n font: undefined,\n scale: undefined\n };\n this.text_ = '';\n this.textAlign_ = undefined;\n this.textBaseline_ = undefined;\n this.offsetX_ = undefined;\n this.offsetY_ = undefined;\n this.images_ = null;\n this.atlases_ = {};\n this.currAtlas_ = undefined;\n WebGLTextureReplay.prototype.finish.call(this, context);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTextReplay.prototype.setTextStyle = function(textStyle) {\n const state = this.state_;\n const textFillStyle = textStyle.getFill();\n const textStrokeStyle = textStyle.getStroke();\n if (!textStyle || !textStyle.getText() || (!textFillStyle && !textStrokeStyle)) {\n this.text_ = '';\n } else {\n if (!textFillStyle) {\n state.fillColor = null;\n } else {\n const textFillStyleColor = textFillStyle.getColor();\n state.fillColor = asColorLike(textFillStyleColor ?\n textFillStyleColor : DEFAULT_FILLSTYLE);\n }\n if (!textStrokeStyle) {\n state.strokeColor = null;\n state.lineWidth = 0;\n } else {\n const textStrokeStyleColor = textStrokeStyle.getColor();\n state.strokeColor = asColorLike(textStrokeStyleColor ?\n textStrokeStyleColor : DEFAULT_STROKESTYLE);\n state.lineWidth = textStrokeStyle.getWidth() || DEFAULT_LINEWIDTH;\n state.lineCap = textStrokeStyle.getLineCap() || DEFAULT_LINECAP;\n state.lineDashOffset = textStrokeStyle.getLineDashOffset() || DEFAULT_LINEDASHOFFSET;\n state.lineJoin = textStrokeStyle.getLineJoin() || DEFAULT_LINEJOIN;\n state.miterLimit = textStrokeStyle.getMiterLimit() || DEFAULT_MITERLIMIT;\n const lineDash = textStrokeStyle.getLineDash();\n state.lineDash = lineDash ? lineDash.slice() : DEFAULT_LINEDASH;\n }\n state.font = textStyle.getFont() || DEFAULT_FONT;\n state.scale = textStyle.getScale() || 1;\n this.text_ = /** @type {string} */ (textStyle.getText());\n const textAlign = TEXT_ALIGN[textStyle.getTextAlign()];\n const textBaseline = TEXT_ALIGN[textStyle.getTextBaseline()];\n this.textAlign_ = textAlign === undefined ?\n DEFAULT_TEXTALIGN : textAlign;\n this.textBaseline_ = textBaseline === undefined ?\n DEFAULT_TEXTBASELINE : textBaseline;\n this.offsetX_ = textStyle.getOffsetX() || 0;\n this.offsetY_ = textStyle.getOffsetY() || 0;\n this.rotateWithView = !!textStyle.getRotateWithView();\n this.rotation = textStyle.getRotation() || 0;\n\n this.currAtlas_ = this.getAtlas_(state);\n }\n};\n\n\n/**\n * @private\n * @param {Object} state Font attributes.\n * @return {module:ol/render/webgl/TextReplay~GlyphAtlas} Glyph atlas.\n */\nWebGLTextReplay.prototype.getAtlas_ = function(state) {\n let params = [];\n for (const i in state) {\n if (state[i] || state[i] === 0) {\n if (Array.isArray(state[i])) {\n params = params.concat(state[i]);\n } else {\n params.push(state[i]);\n }\n }\n }\n const hash = this.calculateHash_(params);\n if (!this.atlases_[hash]) {\n const mCtx = this.measureCanvas_.getContext('2d');\n mCtx.font = state.font;\n const height = Math.ceil((mCtx.measureText('M').width * 1.5 +\n state.lineWidth / 2) * state.scale);\n\n this.atlases_[hash] = {\n atlas: new AtlasManager({\n space: state.lineWidth + 1\n }),\n width: {},\n height: height\n };\n }\n return this.atlases_[hash];\n};\n\n\n/**\n * @private\n * @param {Array.<string|number>} params Array of parameters.\n * @return {string} Hash string.\n */\nWebGLTextReplay.prototype.calculateHash_ = function(params) {\n //TODO: Create a more performant, reliable, general hash function.\n let hash = '';\n for (let i = 0, ii = params.length; i < ii; ++i) {\n hash += params[i];\n }\n return hash;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTextReplay.prototype.getTextures = function(opt_all) {\n return this.textures_;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTextReplay.prototype.getHitDetectionTextures = function() {\n return this.textures_;\n};\nexport default WebGLTextReplay;\n","/**\n * @module ol/render/webgl/ReplayGroup\n */\nimport {inherits} from '../../util.js';\nimport {numberSafeCompareFunction} from '../../array.js';\nimport {buffer, createOrUpdateFromCoordinate} from '../../extent.js';\nimport {isEmpty} from '../../obj.js';\nimport {ORDER} from '../replay.js';\nimport ReplayGroup from '../ReplayGroup.js';\nimport WebGLCircleReplay from '../webgl/CircleReplay.js';\nimport WebGLImageReplay from '../webgl/ImageReplay.js';\nimport WebGLLineStringReplay from '../webgl/LineStringReplay.js';\nimport WebGLPolygonReplay from '../webgl/PolygonReplay.js';\nimport WebGLTextReplay from '../webgl/TextReplay.js';\n\n/**\n * @type {Array.<number>}\n */\nconst HIT_DETECTION_SIZE = [1, 1];\n\n/**\n * @type {Object.<module:ol/render/ReplayType,\n * function(new: module:ol/render/webgl/Replay, number,\n * module:ol/extent~Extent)>}\n */\nconst BATCH_CONSTRUCTORS = {\n 'Circle': WebGLCircleReplay,\n 'Image': WebGLImageReplay,\n 'LineString': WebGLLineStringReplay,\n 'Polygon': WebGLPolygonReplay,\n 'Text': WebGLTextReplay\n};\n\n\n/**\n * @constructor\n * @extends {module:ol/render/ReplayGroup}\n * @param {number} tolerance Tolerance.\n * @param {module:ol/extent~Extent} maxExtent Max extent.\n * @param {number=} opt_renderBuffer Render buffer.\n * @struct\n */\nconst WebGLReplayGroup = function(tolerance, maxExtent, opt_renderBuffer) {\n ReplayGroup.call(this);\n\n /**\n * @type {module:ol/extent~Extent}\n * @private\n */\n this.maxExtent_ = maxExtent;\n\n /**\n * @type {number}\n * @private\n */\n this.tolerance_ = tolerance;\n\n /**\n * @type {number|undefined}\n * @private\n */\n this.renderBuffer_ = opt_renderBuffer;\n\n /**\n * @private\n * @type {!Object.<string,\n * Object.<module:ol/render/ReplayType, module:ol/render/webgl/Replay>>}\n */\n this.replaysByZIndex_ = {};\n\n};\n\ninherits(WebGLReplayGroup, ReplayGroup);\n\n\n/**\n * @param {module:ol/style/Style} style Style.\n * @param {boolean} group Group with previous replay.\n */\nWebGLReplayGroup.prototype.addDeclutter = function(style, group) {};\n\n\n/**\n * @param {module:ol/webgl/Context} context WebGL context.\n * @return {function()} Delete resources function.\n */\nWebGLReplayGroup.prototype.getDeleteResourcesFunction = function(context) {\n const functions = [];\n let zKey;\n for (zKey in this.replaysByZIndex_) {\n const replays = this.replaysByZIndex_[zKey];\n for (const replayKey in replays) {\n functions.push(\n replays[replayKey].getDeleteResourcesFunction(context));\n }\n }\n return function() {\n const length = functions.length;\n let result;\n for (let i = 0; i < length; i++) {\n result = functions[i].apply(this, arguments);\n }\n return result;\n };\n};\n\n\n/**\n * @param {module:ol/webgl/Context} context Context.\n */\nWebGLReplayGroup.prototype.finish = function(context) {\n let zKey;\n for (zKey in this.replaysByZIndex_) {\n const replays = this.replaysByZIndex_[zKey];\n for (const replayKey in replays) {\n replays[replayKey].finish(context);\n }\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLReplayGroup.prototype.getReplay = function(zIndex, replayType) {\n const zIndexKey = zIndex !== undefined ? zIndex.toString() : '0';\n let replays = this.replaysByZIndex_[zIndexKey];\n if (replays === undefined) {\n replays = {};\n this.replaysByZIndex_[zIndexKey] = replays;\n }\n let replay = replays[replayType];\n if (replay === undefined) {\n /**\n * @type {Function}\n */\n const Constructor = BATCH_CONSTRUCTORS[replayType];\n replay = new Constructor(this.tolerance_, this.maxExtent_);\n replays[replayType] = replay;\n }\n return replay;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLReplayGroup.prototype.isEmpty = function() {\n return isEmpty(this.replaysByZIndex_);\n};\n\n\n/**\n * @param {module:ol/webgl/Context} context Context.\n * @param {module:ol/coordinate~Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {module:ol/size~Size} size Size.\n * @param {number} pixelRatio Pixel ratio.\n * @param {number} opacity Global opacity.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features to skip.\n */\nWebGLReplayGroup.prototype.replay = function(context,\n center, resolution, rotation, size, pixelRatio,\n opacity, skippedFeaturesHash) {\n /** @type {Array.<number>} */\n const zs = Object.keys(this.replaysByZIndex_).map(Number);\n zs.sort(numberSafeCompareFunction);\n\n let i, ii, j, jj, replays, replay;\n for (i = 0, ii = zs.length; i < ii; ++i) {\n replays = this.replaysByZIndex_[zs[i].toString()];\n for (j = 0, jj = ORDER.length; j < jj; ++j) {\n replay = replays[ORDER[j]];\n if (replay !== undefined) {\n replay.replay(context,\n center, resolution, rotation, size, pixelRatio,\n opacity, skippedFeaturesHash,\n undefined, false);\n }\n }\n }\n};\n\n\n/**\n * @private\n * @param {module:ol/webgl/Context} context Context.\n * @param {module:ol/coordinate~Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {module:ol/size~Size} size Size.\n * @param {number} pixelRatio Pixel ratio.\n * @param {number} opacity Global opacity.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features to skip.\n * @param {function((module:ol/Feature|module:ol/render/Feature)): T|undefined} featureCallback Feature callback.\n * @param {boolean} oneByOne Draw features one-by-one for the hit-detecion.\n * @param {module:ol/extent~Extent=} opt_hitExtent Hit extent: Only features intersecting\n * this extent are checked.\n * @return {T|undefined} Callback result.\n * @template T\n */\nWebGLReplayGroup.prototype.replayHitDetection_ = function(context,\n center, resolution, rotation, size, pixelRatio, opacity,\n skippedFeaturesHash, featureCallback, oneByOne, opt_hitExtent) {\n /** @type {Array.<number>} */\n const zs = Object.keys(this.replaysByZIndex_).map(Number);\n zs.sort(function(a, b) {\n return b - a;\n });\n\n let i, ii, j, replays, replay, result;\n for (i = 0, ii = zs.length; i < ii; ++i) {\n replays = this.replaysByZIndex_[zs[i].toString()];\n for (j = ORDER.length - 1; j >= 0; --j) {\n replay = replays[ORDER[j]];\n if (replay !== undefined) {\n result = replay.replay(context,\n center, resolution, rotation, size, pixelRatio, opacity,\n skippedFeaturesHash, featureCallback, oneByOne, opt_hitExtent);\n if (result) {\n return result;\n }\n }\n }\n }\n return undefined;\n};\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {module:ol/webgl/Context} context Context.\n * @param {module:ol/coordinate~Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {module:ol/size~Size} size Size.\n * @param {number} pixelRatio Pixel ratio.\n * @param {number} opacity Global opacity.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features to skip.\n * @param {function((module:ol/Feature|module:ol/render/Feature)): T|undefined} callback Feature callback.\n * @return {T|undefined} Callback result.\n * @template T\n */\nWebGLReplayGroup.prototype.forEachFeatureAtCoordinate = function(\n coordinate, context, center, resolution, rotation, size, pixelRatio,\n opacity, skippedFeaturesHash,\n callback) {\n const gl = context.getGL();\n gl.bindFramebuffer(\n gl.FRAMEBUFFER, context.getHitDetectionFramebuffer());\n\n\n /**\n * @type {module:ol/extent~Extent}\n */\n let hitExtent;\n if (this.renderBuffer_ !== undefined) {\n // build an extent around the coordinate, so that only features that\n // intersect this extent are checked\n hitExtent = buffer(createOrUpdateFromCoordinate(coordinate), resolution * this.renderBuffer_);\n }\n\n return this.replayHitDetection_(context,\n coordinate, resolution, rotation, HIT_DETECTION_SIZE,\n pixelRatio, opacity, skippedFeaturesHash,\n /**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @return {?} Callback result.\n */\n function(feature) {\n const imageData = new Uint8Array(4);\n gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, imageData);\n\n if (imageData[3] > 0) {\n const result = callback(feature);\n if (result) {\n return result;\n }\n }\n }, true, hitExtent);\n};\n\n\n/**\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {module:ol/webgl/Context} context Context.\n * @param {module:ol/coordinate~Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {module:ol/size~Size} size Size.\n * @param {number} pixelRatio Pixel ratio.\n * @param {number} opacity Global opacity.\n * @param {Object.<string, boolean>} skippedFeaturesHash Ids of features to skip.\n * @return {boolean} Is there a feature at the given coordinate?\n */\nWebGLReplayGroup.prototype.hasFeatureAtCoordinate = function(\n coordinate, context, center, resolution, rotation, size, pixelRatio,\n opacity, skippedFeaturesHash) {\n const gl = context.getGL();\n gl.bindFramebuffer(\n gl.FRAMEBUFFER, context.getHitDetectionFramebuffer());\n\n const hasFeature = this.replayHitDetection_(context,\n coordinate, resolution, rotation, HIT_DETECTION_SIZE,\n pixelRatio, opacity, skippedFeaturesHash,\n /**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @return {boolean} Is there a feature?\n */\n function(feature) {\n const imageData = new Uint8Array(4);\n gl.readPixels(0, 0, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, imageData);\n return imageData[3] > 0;\n }, false);\n\n return hasFeature !== undefined;\n};\n\nexport default WebGLReplayGroup;\n","/**\n * @module ol/render/webgl/Immediate\n */\nimport {inherits} from '../../util.js';\nimport {intersects} from '../../extent.js';\nimport GeometryType from '../../geom/GeometryType.js';\nimport ReplayType from '../ReplayType.js';\nimport VectorContext from '../VectorContext.js';\nimport WebGLReplayGroup from '../webgl/ReplayGroup.js';\n\n/**\n * @constructor\n * @extends {module:ol/render/VectorContext}\n * @param {module:ol/webgl/Context} context Context.\n * @param {module:ol/coordinate~Coordinate} center Center.\n * @param {number} resolution Resolution.\n * @param {number} rotation Rotation.\n * @param {module:ol/size~Size} size Size.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} pixelRatio Pixel ratio.\n * @struct\n */\nconst WebGLImmediateRenderer = function(context, center, resolution, rotation, size, extent, pixelRatio) {\n VectorContext.call(this);\n\n /**\n * @private\n */\n this.context_ = context;\n\n /**\n * @private\n */\n this.center_ = center;\n\n /**\n * @private\n */\n this.extent_ = extent;\n\n /**\n * @private\n */\n this.pixelRatio_ = pixelRatio;\n\n /**\n * @private\n */\n this.size_ = size;\n\n /**\n * @private\n */\n this.rotation_ = rotation;\n\n /**\n * @private\n */\n this.resolution_ = resolution;\n\n /**\n * @private\n * @type {module:ol/style/Image}\n */\n this.imageStyle_ = null;\n\n /**\n * @private\n * @type {module:ol/style/Fill}\n */\n this.fillStyle_ = null;\n\n /**\n * @private\n * @type {module:ol/style/Stroke}\n */\n this.strokeStyle_ = null;\n\n /**\n * @private\n * @type {module:ol/style/Text}\n */\n this.textStyle_ = null;\n\n};\n\ninherits(WebGLImmediateRenderer, VectorContext);\n\n\n/**\n * @param {module:ol/render/webgl/ReplayGroup} replayGroup Replay group.\n * @param {module:ol/geom/Geometry|module:ol/render/Feature} geometry Geometry.\n * @private\n */\nWebGLImmediateRenderer.prototype.drawText_ = function(replayGroup, geometry) {\n const context = this.context_;\n const replay = /** @type {module:ol/render/webgl/TextReplay} */ (\n replayGroup.getReplay(0, ReplayType.TEXT));\n replay.setTextStyle(this.textStyle_);\n replay.drawText(geometry, null);\n replay.finish(context);\n // default colors\n const opacity = 1;\n const skippedFeatures = {};\n let featureCallback;\n const oneByOne = false;\n replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n oneByOne);\n replay.getDeleteResourcesFunction(context)();\n};\n\n\n/**\n * Set the rendering style. Note that since this is an immediate rendering API,\n * any `zIndex` on the provided style will be ignored.\n *\n * @param {module:ol/style/Style} style The rendering style.\n * @override\n * @api\n */\nWebGLImmediateRenderer.prototype.setStyle = function(style) {\n this.setFillStrokeStyle(style.getFill(), style.getStroke());\n this.setImageStyle(style.getImage());\n this.setTextStyle(style.getText());\n};\n\n\n/**\n * Render a geometry into the canvas. Call\n * {@link ol/render/webgl/Immediate#setStyle} first to set the rendering style.\n *\n * @param {module:ol/geom/Geometry|module:ol/render/Feature} geometry The geometry to render.\n * @override\n * @api\n */\nWebGLImmediateRenderer.prototype.drawGeometry = function(geometry) {\n const type = geometry.getType();\n switch (type) {\n case GeometryType.POINT:\n this.drawPoint(/** @type {module:ol/geom/Point} */ (geometry), null);\n break;\n case GeometryType.LINE_STRING:\n this.drawLineString(/** @type {module:ol/geom/LineString} */ (geometry), null);\n break;\n case GeometryType.POLYGON:\n this.drawPolygon(/** @type {module:ol/geom/Polygon} */ (geometry), null);\n break;\n case GeometryType.MULTI_POINT:\n this.drawMultiPoint(/** @type {module:ol/geom/MultiPoint} */ (geometry), null);\n break;\n case GeometryType.MULTI_LINE_STRING:\n this.drawMultiLineString(/** @type {module:ol/geom/MultiLineString} */ (geometry), null);\n break;\n case GeometryType.MULTI_POLYGON:\n this.drawMultiPolygon(/** @type {module:ol/geom/MultiPolygon} */ (geometry), null);\n break;\n case GeometryType.GEOMETRY_COLLECTION:\n this.drawGeometryCollection(/** @type {module:ol/geom/GeometryCollection} */ (geometry), null);\n break;\n case GeometryType.CIRCLE:\n this.drawCircle(/** @type {module:ol/geom/Circle} */ (geometry), null);\n break;\n default:\n // pass\n }\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nWebGLImmediateRenderer.prototype.drawFeature = function(feature, style) {\n const geometry = style.getGeometryFunction()(feature);\n if (!geometry || !intersects(this.extent_, geometry.getExtent())) {\n return;\n }\n this.setStyle(style);\n this.drawGeometry(geometry);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImmediateRenderer.prototype.drawGeometryCollection = function(geometry, data) {\n const geometries = geometry.getGeometriesArray();\n let i, ii;\n for (i = 0, ii = geometries.length; i < ii; ++i) {\n this.drawGeometry(geometries[i]);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImmediateRenderer.prototype.drawPoint = function(geometry, data) {\n const context = this.context_;\n const replayGroup = new WebGLReplayGroup(1, this.extent_);\n const replay = /** @type {module:ol/render/webgl/ImageReplay} */ (\n replayGroup.getReplay(0, ReplayType.IMAGE));\n replay.setImageStyle(this.imageStyle_);\n replay.drawPoint(geometry, data);\n replay.finish(context);\n // default colors\n const opacity = 1;\n const skippedFeatures = {};\n let featureCallback;\n const oneByOne = false;\n replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n oneByOne);\n replay.getDeleteResourcesFunction(context)();\n\n if (this.textStyle_) {\n this.drawText_(replayGroup, geometry);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImmediateRenderer.prototype.drawMultiPoint = function(geometry, data) {\n const context = this.context_;\n const replayGroup = new WebGLReplayGroup(1, this.extent_);\n const replay = /** @type {module:ol/render/webgl/ImageReplay} */ (\n replayGroup.getReplay(0, ReplayType.IMAGE));\n replay.setImageStyle(this.imageStyle_);\n replay.drawMultiPoint(geometry, data);\n replay.finish(context);\n const opacity = 1;\n const skippedFeatures = {};\n let featureCallback;\n const oneByOne = false;\n replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n oneByOne);\n replay.getDeleteResourcesFunction(context)();\n\n if (this.textStyle_) {\n this.drawText_(replayGroup, geometry);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImmediateRenderer.prototype.drawLineString = function(geometry, data) {\n const context = this.context_;\n const replayGroup = new WebGLReplayGroup(1, this.extent_);\n const replay = /** @type {module:ol/render/webgl/LineStringReplay} */ (\n replayGroup.getReplay(0, ReplayType.LINE_STRING));\n replay.setFillStrokeStyle(null, this.strokeStyle_);\n replay.drawLineString(geometry, data);\n replay.finish(context);\n const opacity = 1;\n const skippedFeatures = {};\n let featureCallback;\n const oneByOne = false;\n replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n oneByOne);\n replay.getDeleteResourcesFunction(context)();\n\n if (this.textStyle_) {\n this.drawText_(replayGroup, geometry);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImmediateRenderer.prototype.drawMultiLineString = function(geometry, data) {\n const context = this.context_;\n const replayGroup = new WebGLReplayGroup(1, this.extent_);\n const replay = /** @type {module:ol/render/webgl/LineStringReplay} */ (\n replayGroup.getReplay(0, ReplayType.LINE_STRING));\n replay.setFillStrokeStyle(null, this.strokeStyle_);\n replay.drawMultiLineString(geometry, data);\n replay.finish(context);\n const opacity = 1;\n const skippedFeatures = {};\n let featureCallback;\n const oneByOne = false;\n replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n oneByOne);\n replay.getDeleteResourcesFunction(context)();\n\n if (this.textStyle_) {\n this.drawText_(replayGroup, geometry);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImmediateRenderer.prototype.drawPolygon = function(geometry, data) {\n const context = this.context_;\n const replayGroup = new WebGLReplayGroup(1, this.extent_);\n const replay = /** @type {module:ol/render/webgl/PolygonReplay} */ (\n replayGroup.getReplay(0, ReplayType.POLYGON));\n replay.setFillStrokeStyle(this.fillStyle_, this.strokeStyle_);\n replay.drawPolygon(geometry, data);\n replay.finish(context);\n const opacity = 1;\n const skippedFeatures = {};\n let featureCallback;\n const oneByOne = false;\n replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n oneByOne);\n replay.getDeleteResourcesFunction(context)();\n\n if (this.textStyle_) {\n this.drawText_(replayGroup, geometry);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImmediateRenderer.prototype.drawMultiPolygon = function(geometry, data) {\n const context = this.context_;\n const replayGroup = new WebGLReplayGroup(1, this.extent_);\n const replay = /** @type {module:ol/render/webgl/PolygonReplay} */ (\n replayGroup.getReplay(0, ReplayType.POLYGON));\n replay.setFillStrokeStyle(this.fillStyle_, this.strokeStyle_);\n replay.drawMultiPolygon(geometry, data);\n replay.finish(context);\n const opacity = 1;\n const skippedFeatures = {};\n let featureCallback;\n const oneByOne = false;\n replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n oneByOne);\n replay.getDeleteResourcesFunction(context)();\n\n if (this.textStyle_) {\n this.drawText_(replayGroup, geometry);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImmediateRenderer.prototype.drawCircle = function(geometry, data) {\n const context = this.context_;\n const replayGroup = new WebGLReplayGroup(1, this.extent_);\n const replay = /** @type {module:ol/render/webgl/CircleReplay} */ (\n replayGroup.getReplay(0, ReplayType.CIRCLE));\n replay.setFillStrokeStyle(this.fillStyle_, this.strokeStyle_);\n replay.drawCircle(geometry, data);\n replay.finish(context);\n const opacity = 1;\n const skippedFeatures = {};\n let featureCallback;\n const oneByOne = false;\n replay.replay(this.context_, this.center_, this.resolution_, this.rotation_,\n this.size_, this.pixelRatio_, opacity, skippedFeatures, featureCallback,\n oneByOne);\n replay.getDeleteResourcesFunction(context)();\n\n if (this.textStyle_) {\n this.drawText_(replayGroup, geometry);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImmediateRenderer.prototype.setImageStyle = function(imageStyle) {\n this.imageStyle_ = imageStyle;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImmediateRenderer.prototype.setFillStrokeStyle = function(fillStyle, strokeStyle) {\n this.fillStyle_ = fillStyle;\n this.strokeStyle_ = strokeStyle;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImmediateRenderer.prototype.setTextStyle = function(textStyle) {\n this.textStyle_ = textStyle;\n};\nexport default WebGLImmediateRenderer;\n","/**\n * @module ol/renderer/webgl/defaultmapshader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../webgl.js';\nimport WebGLFragment from '../../webgl/Fragment.js';\nimport WebGLVertex from '../../webgl/Vertex.js';\n\nexport const fragment = new WebGLFragment(DEBUG_WEBGL ?\n 'precision mediump float;\\nvarying vec2 v_texCoord;\\n\\n\\nuniform float u_opacity;\\nuniform sampler2D u_texture;\\n\\nvoid main(void) {\\n vec4 texColor = texture2D(u_texture, v_texCoord);\\n gl_FragColor.rgb = texColor.rgb;\\n gl_FragColor.a = texColor.a * u_opacity;\\n}\\n' :\n 'precision mediump float;varying vec2 a;uniform float f;uniform sampler2D g;void main(void){vec4 texColor=texture2D(g,a);gl_FragColor.rgb=texColor.rgb;gl_FragColor.a=texColor.a*f;}');\n\nexport const vertex = new WebGLVertex(DEBUG_WEBGL ?\n 'varying vec2 v_texCoord;\\n\\n\\nattribute vec2 a_position;\\nattribute vec2 a_texCoord;\\n\\nuniform mat4 u_texCoordMatrix;\\nuniform mat4 u_projectionMatrix;\\n\\nvoid main(void) {\\n gl_Position = u_projectionMatrix * vec4(a_position, 0., 1.);\\n v_texCoord = (u_texCoordMatrix * vec4(a_texCoord, 0., 1.)).st;\\n}\\n\\n\\n' :\n 'varying vec2 a;attribute vec2 b;attribute vec2 c;uniform mat4 d;uniform mat4 e;void main(void){gl_Position=e*vec4(b,0.,1.);a=(d*vec4(c,0.,1.)).st;}');\n","/**\n * @module ol/renderer/webgl/defaultmapshader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\n\n/**\n * @constructor\n * @param {WebGLRenderingContext} gl GL.\n * @param {WebGLProgram} program Program.\n * @struct\n */\nconst Locations = function(gl, program) {\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_texCoordMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_texCoordMatrix' : 'd');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_projectionMatrix = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_projectionMatrix' : 'e');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_opacity = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_opacity' : 'f');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_texture = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_texture' : 'g');\n\n /**\n * @type {number}\n */\n this.a_position = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_position' : 'b');\n\n /**\n * @type {number}\n */\n this.a_texCoord = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_texCoord' : 'c');\n};\n\nexport default Locations;\n","/**\n * @module ol/renderer/webgl/Layer\n */\nimport {inherits} from '../../util.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport WebGLImmediateRenderer from '../../render/webgl/Immediate.js';\nimport LayerRenderer from '../Layer.js';\nimport {fragment, vertex} from '../webgl/defaultmapshader.js';\nimport Locations from '../webgl/defaultmapshader/Locations.js';\nimport {create as createTransform} from '../../transform.js';\nimport {create, fromTransform} from '../../vec/mat4.js';\nimport {ARRAY_BUFFER, FRAMEBUFFER, FLOAT, TEXTURE_2D,\n TRIANGLE_STRIP, COLOR_ATTACHMENT0} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\nimport {createEmptyTexture} from '../../webgl/Context.js';\n\n/**\n * @constructor\n * @abstract\n * @extends {module:ol/renderer/Layer}\n * @param {module:ol/renderer/webgl/Map} mapRenderer Map renderer.\n * @param {module:ol/layer/Layer} layer Layer.\n */\nconst WebGLLayerRenderer = function(mapRenderer, layer) {\n\n LayerRenderer.call(this, layer);\n\n /**\n * @protected\n * @type {module:ol/renderer/webgl/Map}\n */\n this.mapRenderer = mapRenderer;\n\n /**\n * @private\n * @type {module:ol/webgl/Buffer}\n */\n this.arrayBuffer_ = new WebGLBuffer([\n -1, -1, 0, 0,\n 1, -1, 1, 0,\n -1, 1, 0, 1,\n 1, 1, 1, 1\n ]);\n\n /**\n * @protected\n * @type {WebGLTexture}\n */\n this.texture = null;\n\n /**\n * @protected\n * @type {WebGLFramebuffer}\n */\n this.framebuffer = null;\n\n /**\n * @protected\n * @type {number|undefined}\n */\n this.framebufferDimension = undefined;\n\n /**\n * @protected\n * @type {module:ol/transform~Transform}\n */\n this.texCoordMatrix = createTransform();\n\n /**\n * @protected\n * @type {module:ol/transform~Transform}\n */\n this.projectionMatrix = createTransform();\n\n /**\n * @type {Array.<number>}\n * @private\n */\n this.tmpMat4_ = create();\n\n /**\n * @private\n * @type {module:ol/renderer/webgl/defaultmapshader/Locations}\n */\n this.defaultLocations_ = null;\n\n};\n\ninherits(WebGLLayerRenderer, LayerRenderer);\n\n\n/**\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {number} framebufferDimension Framebuffer dimension.\n * @protected\n */\nWebGLLayerRenderer.prototype.bindFramebuffer = function(frameState, framebufferDimension) {\n\n const gl = this.mapRenderer.getGL();\n\n if (this.framebufferDimension === undefined ||\n this.framebufferDimension != framebufferDimension) {\n /**\n * @param {WebGLRenderingContext} gl GL.\n * @param {WebGLFramebuffer} framebuffer Framebuffer.\n * @param {WebGLTexture} texture Texture.\n */\n const postRenderFunction = function(gl, framebuffer, texture) {\n if (!gl.isContextLost()) {\n gl.deleteFramebuffer(framebuffer);\n gl.deleteTexture(texture);\n }\n }.bind(null, gl, this.framebuffer, this.texture);\n\n frameState.postRenderFunctions.push(\n /** @type {module:ol/PluggableMap~PostRenderFunction} */ (postRenderFunction)\n );\n\n const texture = createEmptyTexture(\n gl, framebufferDimension, framebufferDimension);\n\n const framebuffer = gl.createFramebuffer();\n gl.bindFramebuffer(FRAMEBUFFER, framebuffer);\n gl.framebufferTexture2D(FRAMEBUFFER,\n COLOR_ATTACHMENT0, TEXTURE_2D, texture, 0);\n\n this.texture = texture;\n this.framebuffer = framebuffer;\n this.framebufferDimension = framebufferDimension;\n\n } else {\n gl.bindFramebuffer(FRAMEBUFFER, this.framebuffer);\n }\n\n};\n\n\n/**\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {module:ol/layer/Layer~State} layerState Layer state.\n * @param {module:ol/webgl/Context} context Context.\n */\nWebGLLayerRenderer.prototype.composeFrame = function(frameState, layerState, context) {\n\n this.dispatchComposeEvent_(RenderEventType.PRECOMPOSE, context, frameState);\n\n context.bindBuffer(ARRAY_BUFFER, this.arrayBuffer_);\n\n const gl = context.getGL();\n\n const program = context.getProgram(fragment, vertex);\n\n let locations;\n if (!this.defaultLocations_) {\n locations = new Locations(gl, program);\n this.defaultLocations_ = locations;\n } else {\n locations = this.defaultLocations_;\n }\n\n if (context.useProgram(program)) {\n gl.enableVertexAttribArray(locations.a_position);\n gl.vertexAttribPointer(\n locations.a_position, 2, FLOAT, false, 16, 0);\n gl.enableVertexAttribArray(locations.a_texCoord);\n gl.vertexAttribPointer(\n locations.a_texCoord, 2, FLOAT, false, 16, 8);\n gl.uniform1i(locations.u_texture, 0);\n }\n\n gl.uniformMatrix4fv(locations.u_texCoordMatrix, false,\n fromTransform(this.tmpMat4_, this.getTexCoordMatrix()));\n gl.uniformMatrix4fv(locations.u_projectionMatrix, false,\n fromTransform(this.tmpMat4_, this.getProjectionMatrix()));\n gl.uniform1f(locations.u_opacity, layerState.opacity);\n gl.bindTexture(TEXTURE_2D, this.getTexture());\n gl.drawArrays(TRIANGLE_STRIP, 0, 4);\n\n this.dispatchComposeEvent_(RenderEventType.POSTCOMPOSE, context, frameState);\n};\n\n\n/**\n * @param {module:ol/render/EventType} type Event type.\n * @param {module:ol/webgl/Context} context WebGL context.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @private\n */\nWebGLLayerRenderer.prototype.dispatchComposeEvent_ = function(type, context, frameState) {\n const layer = this.getLayer();\n if (layer.hasListener(type)) {\n const viewState = frameState.viewState;\n const resolution = viewState.resolution;\n const pixelRatio = frameState.pixelRatio;\n const extent = frameState.extent;\n const center = viewState.center;\n const rotation = viewState.rotation;\n const size = frameState.size;\n\n const render = new WebGLImmediateRenderer(\n context, center, resolution, rotation, size, extent, pixelRatio);\n const composeEvent = new RenderEvent(\n type, render, frameState, null, context);\n layer.dispatchEvent(composeEvent);\n }\n};\n\n\n/**\n * @return {!module:ol/transform~Transform} Matrix.\n */\nWebGLLayerRenderer.prototype.getTexCoordMatrix = function() {\n return this.texCoordMatrix;\n};\n\n\n/**\n * @return {WebGLTexture} Texture.\n */\nWebGLLayerRenderer.prototype.getTexture = function() {\n return this.texture;\n};\n\n\n/**\n * @return {!module:ol/transform~Transform} Matrix.\n */\nWebGLLayerRenderer.prototype.getProjectionMatrix = function() {\n return this.projectionMatrix;\n};\n\n\n/**\n * Handle webglcontextlost.\n */\nWebGLLayerRenderer.prototype.handleWebGLContextLost = function() {\n this.texture = null;\n this.framebuffer = null;\n this.framebufferDimension = undefined;\n};\n\n\n/**\n * @abstract\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @param {module:ol/layer/Layer~State} layerState Layer state.\n * @param {module:ol/webgl/Context} context Context.\n * @return {boolean} whether composeFrame should be called.\n */\nWebGLLayerRenderer.prototype.prepareFrame = function(frameState, layerState, context) {};\n\n\n/**\n * @abstract\n * @param {module:ol~Pixel} pixel Pixel.\n * @param {module:ol/PluggableMap~FrameState} frameState FrameState.\n * @param {function(this: S, module:ol/layer/Layer, (Uint8ClampedArray|Uint8Array)): T} callback Layer\n * callback.\n * @param {S} thisArg Value to use as `this` when executing `callback`.\n * @return {T|undefined} Callback result.\n * @template S,T,U\n */\nWebGLLayerRenderer.prototype.forEachLayerAtPixel = function(pixel, frameState, callback, thisArg) {};\nexport default WebGLLayerRenderer;\n","/**\n * @module ol/renderer/webgl/ImageLayer\n */\nimport {ENABLE_RASTER_REPROJECTION} from '../../reproj/common.js';\nimport {inherits} from '../../util.js';\nimport {TRUE, UNDEFINED} from '../../functions.js';\nimport LayerType from '../../LayerType.js';\nimport ViewHint from '../../ViewHint.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {getIntersection, isEmpty} from '../../extent.js';\nimport WebGLLayerRenderer from '../webgl/Layer.js';\nimport {\n create as createTransform,\n rotate as rotateTransform,\n translate as translateTransform,\n scale as scaleTransform,\n reset as resetTransform,\n apply as applyTransform,\n invert as invertTransform,\n multiply as multiplyTransform\n} from '../../transform.js';\nimport {CLAMP_TO_EDGE} from '../../webgl.js';\nimport {createTexture} from '../../webgl/Context.js';\n\n/**\n * @constructor\n * @extends {module:ol/renderer/webgl/Layer}\n * @param {module:ol/renderer/webgl/Map} mapRenderer Map renderer.\n * @param {module:ol/layer/Image} imageLayer Tile layer.\n * @api\n */\nconst WebGLImageLayerRenderer = function(mapRenderer, imageLayer) {\n\n WebGLLayerRenderer.call(this, mapRenderer, imageLayer);\n\n /**\n * The last rendered image.\n * @private\n * @type {?module:ol/ImageBase}\n */\n this.image_ = null;\n\n /**\n * @private\n * @type {CanvasRenderingContext2D}\n */\n this.hitCanvasContext_ = null;\n\n /**\n * @private\n * @type {?module:ol/transform~Transform}\n */\n this.hitTransformationMatrix_ = null;\n\n};\n\ninherits(WebGLImageLayerRenderer, WebGLLayerRenderer);\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {module:ol/layer/Layer} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nWebGLImageLayerRenderer['handles'] = function(layer) {\n return layer.getType() === LayerType.IMAGE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {module:ol/renderer/Map} mapRenderer The map renderer.\n * @param {module:ol/layer/Layer} layer The layer to be rendererd.\n * @return {module:ol/renderer/webgl/ImageLayer} The layer renderer.\n */\nWebGLImageLayerRenderer['create'] = function(mapRenderer, layer) {\n return new WebGLImageLayerRenderer(\n /** @type {module:ol/renderer/webgl/Map} */ (mapRenderer),\n /** @type {module:ol/layer/Image} */ (layer)\n );\n};\n\n\n/**\n * @param {module:ol/ImageBase} image Image.\n * @private\n * @return {WebGLTexture} Texture.\n */\nWebGLImageLayerRenderer.prototype.createTexture_ = function(image) {\n\n // We meet the conditions to work with non-power of two textures.\n // http://www.khronos.org/webgl/wiki/WebGL_and_OpenGL_Differences#Non-Power_of_Two_Texture_Support\n // http://learningwebgl.com/blog/?p=2101\n\n const imageElement = image.getImage();\n const gl = this.mapRenderer.getGL();\n\n return createTexture(\n gl, imageElement, CLAMP_TO_EDGE, CLAMP_TO_EDGE);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImageLayerRenderer.prototype.forEachFeatureAtCoordinate = function(coordinate, frameState, hitTolerance, callback, thisArg) {\n const layer = this.getLayer();\n const source = layer.getSource();\n const resolution = frameState.viewState.resolution;\n const rotation = frameState.viewState.rotation;\n const skippedFeatureUids = frameState.skippedFeatureUids;\n return source.forEachFeatureAtCoordinate(\n coordinate, resolution, rotation, hitTolerance, skippedFeatureUids,\n\n /**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @return {?} Callback result.\n */\n function(feature) {\n return callback.call(thisArg, feature, layer);\n });\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImageLayerRenderer.prototype.prepareFrame = function(frameState, layerState, context) {\n\n const gl = this.mapRenderer.getGL();\n\n const pixelRatio = frameState.pixelRatio;\n const viewState = frameState.viewState;\n const viewCenter = viewState.center;\n const viewResolution = viewState.resolution;\n const viewRotation = viewState.rotation;\n\n let image = this.image_;\n let texture = this.texture;\n const imageLayer = /** @type {module:ol/layer/Image} */ (this.getLayer());\n const imageSource = imageLayer.getSource();\n\n const hints = frameState.viewHints;\n\n let renderedExtent = frameState.extent;\n if (layerState.extent !== undefined) {\n renderedExtent = getIntersection(renderedExtent, layerState.extent);\n }\n if (!hints[ViewHint.ANIMATING] && !hints[ViewHint.INTERACTING] &&\n !isEmpty(renderedExtent)) {\n let projection = viewState.projection;\n if (!ENABLE_RASTER_REPROJECTION) {\n const sourceProjection = imageSource.getProjection();\n if (sourceProjection) {\n projection = sourceProjection;\n }\n }\n const image_ = imageSource.getImage(renderedExtent, viewResolution,\n pixelRatio, projection);\n if (image_) {\n const loaded = this.loadImage(image_);\n if (loaded) {\n image = image_;\n texture = this.createTexture_(image_);\n if (this.texture) {\n /**\n * @param {WebGLRenderingContext} gl GL.\n * @param {WebGLTexture} texture Texture.\n */\n const postRenderFunction = function(gl, texture) {\n if (!gl.isContextLost()) {\n gl.deleteTexture(texture);\n }\n }.bind(null, gl, this.texture);\n frameState.postRenderFunctions.push(\n /** @type {module:ol/PluggableMap~PostRenderFunction} */ (postRenderFunction)\n );\n }\n }\n }\n }\n\n if (image) {\n const canvas = this.mapRenderer.getContext().getCanvas();\n\n this.updateProjectionMatrix_(canvas.width, canvas.height,\n pixelRatio, viewCenter, viewResolution, viewRotation,\n image.getExtent());\n this.hitTransformationMatrix_ = null;\n\n // Translate and scale to flip the Y coord.\n const texCoordMatrix = this.texCoordMatrix;\n resetTransform(texCoordMatrix);\n scaleTransform(texCoordMatrix, 1, -1);\n translateTransform(texCoordMatrix, 0, -1);\n\n this.image_ = image;\n this.texture = texture;\n }\n\n return !!image;\n};\n\n\n/**\n * @param {number} canvasWidth Canvas width.\n * @param {number} canvasHeight Canvas height.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/coordinate~Coordinate} viewCenter View center.\n * @param {number} viewResolution View resolution.\n * @param {number} viewRotation View rotation.\n * @param {module:ol/extent~Extent} imageExtent Image extent.\n * @private\n */\nWebGLImageLayerRenderer.prototype.updateProjectionMatrix_ = function(canvasWidth, canvasHeight, pixelRatio,\n viewCenter, viewResolution, viewRotation, imageExtent) {\n\n const canvasExtentWidth = canvasWidth * viewResolution;\n const canvasExtentHeight = canvasHeight * viewResolution;\n\n const projectionMatrix = this.projectionMatrix;\n resetTransform(projectionMatrix);\n scaleTransform(projectionMatrix,\n pixelRatio * 2 / canvasExtentWidth,\n pixelRatio * 2 / canvasExtentHeight);\n rotateTransform(projectionMatrix, -viewRotation);\n translateTransform(projectionMatrix,\n imageExtent[0] - viewCenter[0],\n imageExtent[1] - viewCenter[1]);\n scaleTransform(projectionMatrix,\n (imageExtent[2] - imageExtent[0]) / 2,\n (imageExtent[3] - imageExtent[1]) / 2);\n translateTransform(projectionMatrix, 1, 1);\n\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImageLayerRenderer.prototype.hasFeatureAtCoordinate = function(coordinate, frameState) {\n const hasFeature = this.forEachFeatureAtCoordinate(coordinate, frameState, 0, TRUE, this);\n return hasFeature !== undefined;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLImageLayerRenderer.prototype.forEachLayerAtPixel = function(pixel, frameState, callback, thisArg) {\n if (!this.image_ || !this.image_.getImage()) {\n return undefined;\n }\n\n if (this.getLayer().getSource().forEachFeatureAtCoordinate !== UNDEFINED) {\n // for ImageCanvas sources use the original hit-detection logic,\n // so that for example also transparent polygons are detected\n const coordinate = applyTransform(\n frameState.pixelToCoordinateTransform, pixel.slice());\n const hasFeature = this.forEachFeatureAtCoordinate(coordinate, frameState, 0, TRUE, this);\n\n if (hasFeature) {\n return callback.call(thisArg, this.getLayer(), null);\n } else {\n return undefined;\n }\n } else {\n const imageSize =\n [this.image_.getImage().width, this.image_.getImage().height];\n\n if (!this.hitTransformationMatrix_) {\n this.hitTransformationMatrix_ = this.getHitTransformationMatrix_(\n frameState.size, imageSize);\n }\n\n const pixelOnFrameBuffer = applyTransform(\n this.hitTransformationMatrix_, pixel.slice());\n\n if (pixelOnFrameBuffer[0] < 0 || pixelOnFrameBuffer[0] > imageSize[0] ||\n pixelOnFrameBuffer[1] < 0 || pixelOnFrameBuffer[1] > imageSize[1]) {\n // outside the image, no need to check\n return undefined;\n }\n\n if (!this.hitCanvasContext_) {\n this.hitCanvasContext_ = createCanvasContext2D(1, 1);\n }\n\n this.hitCanvasContext_.clearRect(0, 0, 1, 1);\n this.hitCanvasContext_.drawImage(this.image_.getImage(),\n pixelOnFrameBuffer[0], pixelOnFrameBuffer[1], 1, 1, 0, 0, 1, 1);\n\n const imageData = this.hitCanvasContext_.getImageData(0, 0, 1, 1).data;\n if (imageData[3] > 0) {\n return callback.call(thisArg, this.getLayer(), imageData);\n } else {\n return undefined;\n }\n }\n};\n\n\n/**\n * The transformation matrix to get the pixel on the image for a\n * pixel on the map.\n * @param {module:ol/size~Size} mapSize The map size.\n * @param {module:ol/size~Size} imageSize The image size.\n * @return {module:ol/transform~Transform} The transformation matrix.\n * @private\n */\nWebGLImageLayerRenderer.prototype.getHitTransformationMatrix_ = function(mapSize, imageSize) {\n // the first matrix takes a map pixel, flips the y-axis and scales to\n // a range between -1 ... 1\n const mapCoordTransform = createTransform();\n translateTransform(mapCoordTransform, -1, -1);\n scaleTransform(mapCoordTransform, 2 / mapSize[0], 2 / mapSize[1]);\n translateTransform(mapCoordTransform, 0, mapSize[1]);\n scaleTransform(mapCoordTransform, 1, -1);\n\n // the second matrix is the inverse of the projection matrix used in the\n // shader for drawing\n const projectionMatrixInv = invertTransform(this.projectionMatrix.slice());\n\n // the third matrix scales to the image dimensions and flips the y-axis again\n const transform = createTransform();\n translateTransform(transform, 0, imageSize[1]);\n scaleTransform(transform, 1, -1);\n scaleTransform(transform, imageSize[0] / 2, imageSize[1] / 2);\n translateTransform(transform, 1, 1);\n\n multiplyTransform(transform, projectionMatrixInv);\n multiplyTransform(transform, mapCoordTransform);\n\n return transform;\n};\nexport default WebGLImageLayerRenderer;\n","/**\n * @module ol/renderer/webgl/Map\n */\n\nimport {inherits} from '../../util.js';\nimport {stableSort} from '../../array.js';\nimport {CLASS_UNSELECTABLE} from '../../css.js';\nimport {createCanvasContext2D} from '../../dom.js';\nimport {listen} from '../../events.js';\nimport {visibleAtResolution} from '../../layer/Layer.js';\nimport RenderEvent from '../../render/Event.js';\nimport RenderEventType from '../../render/EventType.js';\nimport WebGLImmediateRenderer from '../../render/webgl/Immediate.js';\nimport MapRenderer, {sortByZIndex} from '../Map.js';\nimport SourceState from '../../source/State.js';\nimport LRUCache from '../../structs/LRUCache.js';\nimport PriorityQueue from '../../structs/PriorityQueue.js';\nimport {BLEND, CLAMP_TO_EDGE, COLOR_BUFFER_BIT, CULL_FACE, DEPTH_TEST, FRAMEBUFFER,\n getContext, LINEAR, ONE, ONE_MINUS_SRC_ALPHA, RGBA, SCISSOR_TEST, SRC_ALPHA,\n STENCIL_TEST, TEXTURE0, TEXTURE_2D, TEXTURE_MAG_FILTER, TEXTURE_MIN_FILTER,\n TEXTURE_WRAP_S, TEXTURE_WRAP_T, UNSIGNED_BYTE} from '../../webgl.js';\nimport WebGLContext from '../../webgl/Context.js';\nimport ContextEventType from '../../webgl/ContextEventType.js';\n\n\n/**\n * @typedef {Object} TextureCacheEntry\n * @property {number} magFilter\n * @property {number} minFilter\n * @property {WebGLTexture} texture\n */\n\n\n/**\n * Texture cache high water mark.\n * @type {number}\n */\nconst WEBGL_TEXTURE_CACHE_HIGH_WATER_MARK = 1024;\n\n\n/**\n * @constructor\n * @extends {module:ol/renderer/Map}\n * @param {module:ol/PluggableMap} map Map.\n * @api\n */\nconst WebGLMapRenderer = function(map) {\n MapRenderer.call(this, map);\n\n const container = map.getViewport();\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = /** @type {HTMLCanvasElement} */\n (document.createElement('CANVAS'));\n this.canvas_.style.width = '100%';\n this.canvas_.style.height = '100%';\n this.canvas_.style.display = 'block';\n this.canvas_.className = CLASS_UNSELECTABLE;\n container.insertBefore(this.canvas_, container.childNodes[0] || null);\n\n /**\n * @private\n * @type {number}\n */\n this.clipTileCanvasWidth_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.clipTileCanvasHeight_ = 0;\n\n /**\n * @private\n * @type {CanvasRenderingContext2D}\n */\n this.clipTileContext_ = createCanvasContext2D();\n\n /**\n * @private\n * @type {boolean}\n */\n this.renderedVisible_ = true;\n\n /**\n * @private\n * @type {WebGLRenderingContext}\n */\n this.gl_ = getContext(this.canvas_, {\n antialias: true,\n depth: true,\n failIfMajorPerformanceCaveat: true,\n preserveDrawingBuffer: false,\n stencil: true\n });\n\n /**\n * @private\n * @type {module:ol/webgl/Context}\n */\n this.context_ = new WebGLContext(this.canvas_, this.gl_);\n\n listen(this.canvas_, ContextEventType.LOST,\n this.handleWebGLContextLost, this);\n listen(this.canvas_, ContextEventType.RESTORED,\n this.handleWebGLContextRestored, this);\n\n /**\n * @private\n * @type {module:ol/structs/LRUCache.<module:ol/renderer/webgl/Map~TextureCacheEntry|null>}\n */\n this.textureCache_ = new LRUCache();\n\n /**\n * @private\n * @type {module:ol/coordinate~Coordinate}\n */\n this.focus_ = null;\n\n /**\n * @private\n * @type {module:ol/structs/PriorityQueue.<Array>}\n */\n this.tileTextureQueue_ = new PriorityQueue(\n /**\n * @param {Array.<*>} element Element.\n * @return {number} Priority.\n * @this {module:ol/renderer/webgl/Map}\n */\n (function(element) {\n const tileCenter = /** @type {module:ol/coordinate~Coordinate} */ (element[1]);\n const tileResolution = /** @type {number} */ (element[2]);\n const deltaX = tileCenter[0] - this.focus_[0];\n const deltaY = tileCenter[1] - this.focus_[1];\n return 65536 * Math.log(tileResolution) +\n Math.sqrt(deltaX * deltaX + deltaY * deltaY) / tileResolution;\n }).bind(this),\n /**\n * @param {Array.<*>} element Element.\n * @return {string} Key.\n */\n function(element) {\n return (\n /** @type {module:ol/Tile} */ (element[0]).getKey()\n );\n });\n\n\n /**\n * @param {module:ol/PluggableMap} map Map.\n * @param {?module:ol/PluggableMap~FrameState} frameState Frame state.\n * @return {boolean} false.\n * @this {module:ol/renderer/webgl/Map}\n */\n this.loadNextTileTexture_ =\n function(map, frameState) {\n if (!this.tileTextureQueue_.isEmpty()) {\n this.tileTextureQueue_.reprioritize();\n const element = this.tileTextureQueue_.dequeue();\n const tile = /** @type {module:ol/Tile} */ (element[0]);\n const tileSize = /** @type {module:ol/size~Size} */ (element[3]);\n const tileGutter = /** @type {number} */ (element[4]);\n this.bindTileTexture(\n tile, tileSize, tileGutter, LINEAR, LINEAR);\n }\n return false;\n }.bind(this);\n\n\n /**\n * @private\n * @type {number}\n */\n this.textureCacheFrameMarkerCount_ = 0;\n\n this.initializeGL_();\n};\n\ninherits(WebGLMapRenderer, MapRenderer);\n\n\n/**\n * @param {module:ol/Tile} tile Tile.\n * @param {module:ol/size~Size} tileSize Tile size.\n * @param {number} tileGutter Tile gutter.\n * @param {number} magFilter Mag filter.\n * @param {number} minFilter Min filter.\n */\nWebGLMapRenderer.prototype.bindTileTexture = function(tile, tileSize, tileGutter, magFilter, minFilter) {\n const gl = this.getGL();\n const tileKey = tile.getKey();\n if (this.textureCache_.containsKey(tileKey)) {\n const textureCacheEntry = this.textureCache_.get(tileKey);\n gl.bindTexture(TEXTURE_2D, textureCacheEntry.texture);\n if (textureCacheEntry.magFilter != magFilter) {\n gl.texParameteri(\n TEXTURE_2D, TEXTURE_MAG_FILTER, magFilter);\n textureCacheEntry.magFilter = magFilter;\n }\n if (textureCacheEntry.minFilter != minFilter) {\n gl.texParameteri(\n TEXTURE_2D, TEXTURE_MIN_FILTER, minFilter);\n textureCacheEntry.minFilter = minFilter;\n }\n } else {\n const texture = gl.createTexture();\n gl.bindTexture(TEXTURE_2D, texture);\n if (tileGutter > 0) {\n const clipTileCanvas = this.clipTileContext_.canvas;\n const clipTileContext = this.clipTileContext_;\n if (this.clipTileCanvasWidth_ !== tileSize[0] ||\n this.clipTileCanvasHeight_ !== tileSize[1]) {\n clipTileCanvas.width = tileSize[0];\n clipTileCanvas.height = tileSize[1];\n this.clipTileCanvasWidth_ = tileSize[0];\n this.clipTileCanvasHeight_ = tileSize[1];\n } else {\n clipTileContext.clearRect(0, 0, tileSize[0], tileSize[1]);\n }\n clipTileContext.drawImage(tile.getImage(), tileGutter, tileGutter,\n tileSize[0], tileSize[1], 0, 0, tileSize[0], tileSize[1]);\n gl.texImage2D(TEXTURE_2D, 0,\n RGBA, RGBA,\n UNSIGNED_BYTE, clipTileCanvas);\n } else {\n gl.texImage2D(TEXTURE_2D, 0,\n RGBA, RGBA,\n UNSIGNED_BYTE, tile.getImage());\n }\n gl.texParameteri(\n TEXTURE_2D, TEXTURE_MAG_FILTER, magFilter);\n gl.texParameteri(\n TEXTURE_2D, TEXTURE_MIN_FILTER, minFilter);\n gl.texParameteri(TEXTURE_2D, TEXTURE_WRAP_S,\n CLAMP_TO_EDGE);\n gl.texParameteri(TEXTURE_2D, TEXTURE_WRAP_T,\n CLAMP_TO_EDGE);\n this.textureCache_.set(tileKey, {\n texture: texture,\n magFilter: magFilter,\n minFilter: minFilter\n });\n }\n};\n\n\n/**\n * @param {module:ol/render/EventType} type Event type.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @private\n */\nWebGLMapRenderer.prototype.dispatchComposeEvent_ = function(type, frameState) {\n const map = this.getMap();\n if (map.hasListener(type)) {\n const context = this.context_;\n\n const extent = frameState.extent;\n const size = frameState.size;\n const viewState = frameState.viewState;\n const pixelRatio = frameState.pixelRatio;\n\n const resolution = viewState.resolution;\n const center = viewState.center;\n const rotation = viewState.rotation;\n\n const vectorContext = new WebGLImmediateRenderer(context,\n center, resolution, rotation, size, extent, pixelRatio);\n const composeEvent = new RenderEvent(type, vectorContext,\n frameState, null, context);\n map.dispatchEvent(composeEvent);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLMapRenderer.prototype.disposeInternal = function() {\n const gl = this.getGL();\n if (!gl.isContextLost()) {\n this.textureCache_.forEach(\n /**\n * @param {?module:ol/renderer/webgl/Map~TextureCacheEntry} textureCacheEntry\n * Texture cache entry.\n */\n function(textureCacheEntry) {\n if (textureCacheEntry) {\n gl.deleteTexture(textureCacheEntry.texture);\n }\n });\n }\n this.context_.dispose();\n MapRenderer.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * @param {module:ol/PluggableMap} map Map.\n * @param {module:ol/PluggableMap~FrameState} frameState Frame state.\n * @private\n */\nWebGLMapRenderer.prototype.expireCache_ = function(map, frameState) {\n const gl = this.getGL();\n let textureCacheEntry;\n while (this.textureCache_.getCount() - this.textureCacheFrameMarkerCount_ >\n WEBGL_TEXTURE_CACHE_HIGH_WATER_MARK) {\n textureCacheEntry = this.textureCache_.peekLast();\n if (!textureCacheEntry) {\n if (+this.textureCache_.peekLastKey() == frameState.index) {\n break;\n } else {\n --this.textureCacheFrameMarkerCount_;\n }\n } else {\n gl.deleteTexture(textureCacheEntry.texture);\n }\n this.textureCache_.pop();\n }\n};\n\n\n/**\n * @return {module:ol/webgl/Context} The context.\n */\nWebGLMapRenderer.prototype.getContext = function() {\n return this.context_;\n};\n\n\n/**\n * @return {WebGLRenderingContext} GL.\n */\nWebGLMapRenderer.prototype.getGL = function() {\n return this.gl_;\n};\n\n\n/**\n * @return {module:ol/structs/PriorityQueue.<Array>} Tile texture queue.\n */\nWebGLMapRenderer.prototype.getTileTextureQueue = function() {\n return this.tileTextureQueue_;\n};\n\n\n/**\n * @param {module:ol/events/Event} event Event.\n * @protected\n */\nWebGLMapRenderer.prototype.handleWebGLContextLost = function(event) {\n event.preventDefault();\n this.textureCache_.clear();\n this.textureCacheFrameMarkerCount_ = 0;\n\n const renderers = this.getLayerRenderers();\n for (const id in renderers) {\n const renderer = /** @type {module:ol/renderer/webgl/Layer} */ (renderers[id]);\n renderer.handleWebGLContextLost();\n }\n};\n\n\n/**\n * @protected\n */\nWebGLMapRenderer.prototype.handleWebGLContextRestored = function() {\n this.initializeGL_();\n this.getMap().render();\n};\n\n\n/**\n * @private\n */\nWebGLMapRenderer.prototype.initializeGL_ = function() {\n const gl = this.gl_;\n gl.activeTexture(TEXTURE0);\n gl.blendFuncSeparate(\n SRC_ALPHA, ONE_MINUS_SRC_ALPHA,\n ONE, ONE_MINUS_SRC_ALPHA);\n gl.disable(CULL_FACE);\n gl.disable(DEPTH_TEST);\n gl.disable(SCISSOR_TEST);\n gl.disable(STENCIL_TEST);\n};\n\n\n/**\n * @param {module:ol/Tile} tile Tile.\n * @return {boolean} Is tile texture loaded.\n */\nWebGLMapRenderer.prototype.isTileTextureLoaded = function(tile) {\n return this.textureCache_.containsKey(tile.getKey());\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLMapRenderer.prototype.renderFrame = function(frameState) {\n\n const context = this.getContext();\n const gl = this.getGL();\n\n if (gl.isContextLost()) {\n return false;\n }\n\n if (!frameState) {\n if (this.renderedVisible_) {\n this.canvas_.style.display = 'none';\n this.renderedVisible_ = false;\n }\n return false;\n }\n\n this.focus_ = frameState.focus;\n\n this.textureCache_.set((-frameState.index).toString(), null);\n ++this.textureCacheFrameMarkerCount_;\n\n this.dispatchComposeEvent_(RenderEventType.PRECOMPOSE, frameState);\n\n /** @type {Array.<module:ol/layer/Layer~State>} */\n const layerStatesToDraw = [];\n const layerStatesArray = frameState.layerStatesArray;\n stableSort(layerStatesArray, sortByZIndex);\n\n const viewResolution = frameState.viewState.resolution;\n let i, ii, layerRenderer, layerState;\n for (i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n layerState = layerStatesArray[i];\n if (visibleAtResolution(layerState, viewResolution) &&\n layerState.sourceState == SourceState.READY) {\n layerRenderer = /** @type {module:ol/renderer/webgl/Layer} */ (this.getLayerRenderer(layerState.layer));\n if (layerRenderer.prepareFrame(frameState, layerState, context)) {\n layerStatesToDraw.push(layerState);\n }\n }\n }\n\n const width = frameState.size[0] * frameState.pixelRatio;\n const height = frameState.size[1] * frameState.pixelRatio;\n if (this.canvas_.width != width || this.canvas_.height != height) {\n this.canvas_.width = width;\n this.canvas_.height = height;\n }\n\n gl.bindFramebuffer(FRAMEBUFFER, null);\n\n gl.clearColor(0, 0, 0, 0);\n gl.clear(COLOR_BUFFER_BIT);\n gl.enable(BLEND);\n gl.viewport(0, 0, this.canvas_.width, this.canvas_.height);\n\n for (i = 0, ii = layerStatesToDraw.length; i < ii; ++i) {\n layerState = layerStatesToDraw[i];\n layerRenderer = /** @type {module:ol/renderer/webgl/Layer} */ (this.getLayerRenderer(layerState.layer));\n layerRenderer.composeFrame(frameState, layerState, context);\n }\n\n if (!this.renderedVisible_) {\n this.canvas_.style.display = '';\n this.renderedVisible_ = true;\n }\n\n this.calculateMatrices2D(frameState);\n\n if (this.textureCache_.getCount() - this.textureCacheFrameMarkerCount_ >\n WEBGL_TEXTURE_CACHE_HIGH_WATER_MARK) {\n frameState.postRenderFunctions.push(\n /** @type {module:ol/PluggableMap~PostRenderFunction} */ (this.expireCache_.bind(this))\n );\n }\n\n if (!this.tileTextureQueue_.isEmpty()) {\n frameState.postRenderFunctions.push(this.loadNextTileTexture_);\n frameState.animate = true;\n }\n\n this.dispatchComposeEvent_(RenderEventType.POSTCOMPOSE, frameState);\n\n this.scheduleRemoveUnusedLayerRenderers(frameState);\n this.scheduleExpireIconCache(frameState);\n\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLMapRenderer.prototype.forEachFeatureAtCoordinate = function(coordinate, frameState, hitTolerance, callback, thisArg,\n layerFilter, thisArg2) {\n let result;\n\n if (this.getGL().isContextLost()) {\n return false;\n }\n\n const viewState = frameState.viewState;\n\n const layerStates = frameState.layerStatesArray;\n const numLayers = layerStates.length;\n let i;\n for (i = numLayers - 1; i >= 0; --i) {\n const layerState = layerStates[i];\n const layer = layerState.layer;\n if (visibleAtResolution(layerState, viewState.resolution) &&\n layerFilter.call(thisArg2, layer)) {\n const layerRenderer = this.getLayerRenderer(layer);\n result = layerRenderer.forEachFeatureAtCoordinate(\n coordinate, frameState, hitTolerance, callback, thisArg);\n if (result) {\n return result;\n }\n }\n }\n return undefined;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLMapRenderer.prototype.hasFeatureAtCoordinate = function(coordinate, frameState, hitTolerance, layerFilter, thisArg) {\n let hasFeature = false;\n\n if (this.getGL().isContextLost()) {\n return false;\n }\n\n const viewState = frameState.viewState;\n\n const layerStates = frameState.layerStatesArray;\n const numLayers = layerStates.length;\n let i;\n for (i = numLayers - 1; i >= 0; --i) {\n const layerState = layerStates[i];\n const layer = layerState.layer;\n if (visibleAtResolution(layerState, viewState.resolution) &&\n layerFilter.call(thisArg, layer)) {\n const layerRenderer = this.getLayerRenderer(layer);\n hasFeature =\n layerRenderer.hasFeatureAtCoordinate(coordinate, frameState);\n if (hasFeature) {\n return true;\n }\n }\n }\n return hasFeature;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLMapRenderer.prototype.forEachLayerAtPixel = function(pixel, frameState, hitTolerance, callback, thisArg,\n layerFilter, thisArg2) {\n if (this.getGL().isContextLost()) {\n return false;\n }\n\n const viewState = frameState.viewState;\n let result;\n\n const layerStates = frameState.layerStatesArray;\n const numLayers = layerStates.length;\n let i;\n for (i = numLayers - 1; i >= 0; --i) {\n const layerState = layerStates[i];\n const layer = layerState.layer;\n if (visibleAtResolution(layerState, viewState.resolution) &&\n layerFilter.call(thisArg, layer)) {\n const layerRenderer = /** @type {module:ol/renderer/webgl/Layer} */ (this.getLayerRenderer(layer));\n result = layerRenderer.forEachLayerAtPixel(\n pixel, frameState, callback, thisArg);\n if (result) {\n return result;\n }\n }\n }\n return undefined;\n};\n\nexport default WebGLMapRenderer;\n","/**\n * @module ol/renderer/webgl/tilelayershader\n */\n// This file is automatically generated, do not edit.\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../webgl.js';\nimport WebGLFragment from '../../webgl/Fragment.js';\nimport WebGLVertex from '../../webgl/Vertex.js';\n\nexport const fragment = new WebGLFragment(DEBUG_WEBGL ?\n 'precision mediump float;\\nvarying vec2 v_texCoord;\\n\\n\\nuniform sampler2D u_texture;\\n\\nvoid main(void) {\\n gl_FragColor = texture2D(u_texture, v_texCoord);\\n}\\n' :\n 'precision mediump float;varying vec2 a;uniform sampler2D e;void main(void){gl_FragColor=texture2D(e,a);}');\n\nexport const vertex = new WebGLVertex(DEBUG_WEBGL ?\n 'varying vec2 v_texCoord;\\n\\n\\nattribute vec2 a_position;\\nattribute vec2 a_texCoord;\\nuniform vec4 u_tileOffset;\\n\\nvoid main(void) {\\n gl_Position = vec4(a_position * u_tileOffset.xy + u_tileOffset.zw, 0., 1.);\\n v_texCoord = a_texCoord;\\n}\\n\\n\\n' :\n 'varying vec2 a;attribute vec2 b;attribute vec2 c;uniform vec4 d;void main(void){gl_Position=vec4(b*d.xy+d.zw,0.,1.);a=c;}');\n","/**\n * @module ol/renderer/webgl/tilelayershader/Locations\n */\n// This file is automatically generated, do not edit\n// Run `make shaders` to generate, and commit the result.\n\nimport {DEBUG as DEBUG_WEBGL} from '../../../webgl.js';\n\n/**\n * @constructor\n * @param {WebGLRenderingContext} gl GL.\n * @param {WebGLProgram} program Program.\n * @struct\n */\nconst Locations = function(gl, program) {\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_tileOffset = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_tileOffset' : 'd');\n\n /**\n * @type {WebGLUniformLocation}\n */\n this.u_texture = gl.getUniformLocation(\n program, DEBUG_WEBGL ? 'u_texture' : 'e');\n\n /**\n * @type {number}\n */\n this.a_position = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_position' : 'b');\n\n /**\n * @type {number}\n */\n this.a_texCoord = gl.getAttribLocation(\n program, DEBUG_WEBGL ? 'a_texCoord' : 'c');\n};\n\nexport default Locations;\n","/**\n * @module ol/renderer/webgl/TileLayer\n */\n// FIXME large resolutions lead to too large framebuffers :-(\n// FIXME animated shaders! check in redraw\n\nimport {inherits} from '../../util.js';\nimport LayerType from '../../LayerType.js';\nimport TileRange from '../../TileRange.js';\nimport TileState from '../../TileState.js';\nimport {numberSafeCompareFunction} from '../../array.js';\nimport {createEmpty, intersects} from '../../extent.js';\nimport {roundUpToPowerOfTwo} from '../../math.js';\nimport WebGLLayerRenderer from '../webgl/Layer.js';\nimport {fragment, vertex} from '../webgl/tilelayershader.js';\nimport Locations from '../webgl/tilelayershader/Locations.js';\nimport {toSize} from '../../size.js';\nimport {\n reset as resetTransform,\n rotate as rotateTransform,\n scale as scaleTransform,\n translate as translateTransform,\n apply as applyTransform\n} from '../../transform.js';\nimport {COLOR_BUFFER_BIT, BLEND, ARRAY_BUFFER, FLOAT, LINEAR, TRIANGLE_STRIP} from '../../webgl.js';\nimport WebGLBuffer from '../../webgl/Buffer.js';\n\n/**\n * @constructor\n * @extends {module:ol/renderer/webgl/Layer}\n * @param {module:ol/renderer/webgl/Map} mapRenderer Map renderer.\n * @param {module:ol/layer/Tile} tileLayer Tile layer.\n * @api\n */\nconst WebGLTileLayerRenderer = function(mapRenderer, tileLayer) {\n\n WebGLLayerRenderer.call(this, mapRenderer, tileLayer);\n\n /**\n * @private\n * @type {module:ol/webgl/Fragment}\n */\n this.fragmentShader_ = fragment;\n\n /**\n * @private\n * @type {module:ol/webgl/Vertex}\n */\n this.vertexShader_ = vertex;\n\n /**\n * @private\n * @type {module:ol/renderer/webgl/tilelayershader/Locations}\n */\n this.locations_ = null;\n\n /**\n * @private\n * @type {module:ol/webgl/Buffer}\n */\n this.renderArrayBuffer_ = new WebGLBuffer([\n 0, 0, 0, 1,\n 1, 0, 1, 1,\n 0, 1, 0, 0,\n 1, 1, 1, 0\n ]);\n\n /**\n * @private\n * @type {module:ol/TileRange}\n */\n this.renderedTileRange_ = null;\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.renderedFramebufferExtent_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.renderedRevision_ = -1;\n\n /**\n * @private\n * @type {module:ol/size~Size}\n */\n this.tmpSize_ = [0, 0];\n\n};\n\ninherits(WebGLTileLayerRenderer, WebGLLayerRenderer);\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {module:ol/layer/Layer} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nWebGLTileLayerRenderer['handles'] = function(layer) {\n return layer.getType() === LayerType.TILE;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {module:ol/renderer/Map} mapRenderer The map renderer.\n * @param {module:ol/layer/Layer} layer The layer to be rendererd.\n * @return {module:ol/renderer/webgl/TileLayer} The layer renderer.\n */\nWebGLTileLayerRenderer['create'] = function(mapRenderer, layer) {\n return new WebGLTileLayerRenderer(\n /** @type {module:ol/renderer/webgl/Map} */ (mapRenderer),\n /** @type {module:ol/layer/Tile} */ (layer)\n );\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTileLayerRenderer.prototype.disposeInternal = function() {\n const context = this.mapRenderer.getContext();\n context.deleteBuffer(this.renderArrayBuffer_);\n WebGLLayerRenderer.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTileLayerRenderer.prototype.createLoadedTileFinder = function(source, projection, tiles) {\n const mapRenderer = this.mapRenderer;\n\n return (\n /**\n * @param {number} zoom Zoom level.\n * @param {module:ol/TileRange} tileRange Tile range.\n * @return {boolean} The tile range is fully loaded.\n */\n function(zoom, tileRange) {\n function callback(tile) {\n const loaded = mapRenderer.isTileTextureLoaded(tile);\n if (loaded) {\n if (!tiles[zoom]) {\n tiles[zoom] = {};\n }\n tiles[zoom][tile.tileCoord.toString()] = tile;\n }\n return loaded;\n }\n return source.forEachLoadedTile(projection, zoom, tileRange, callback);\n }\n );\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTileLayerRenderer.prototype.handleWebGLContextLost = function() {\n WebGLLayerRenderer.prototype.handleWebGLContextLost.call(this);\n this.locations_ = null;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTileLayerRenderer.prototype.prepareFrame = function(frameState, layerState, context) {\n\n const mapRenderer = this.mapRenderer;\n const gl = context.getGL();\n\n const viewState = frameState.viewState;\n const projection = viewState.projection;\n\n const tileLayer = /** @type {module:ol/layer/Tile} */ (this.getLayer());\n const tileSource = tileLayer.getSource();\n const tileGrid = tileSource.getTileGridForProjection(projection);\n const z = tileGrid.getZForResolution(viewState.resolution);\n const tileResolution = tileGrid.getResolution(z);\n\n const tilePixelSize =\n tileSource.getTilePixelSize(z, frameState.pixelRatio, projection);\n const pixelRatio = tilePixelSize[0] /\n toSize(tileGrid.getTileSize(z), this.tmpSize_)[0];\n const tilePixelResolution = tileResolution / pixelRatio;\n const tileGutter = tileSource.getTilePixelRatio(pixelRatio) * tileSource.getGutter(projection);\n\n const center = viewState.center;\n const extent = frameState.extent;\n const tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n\n let framebufferExtent;\n if (this.renderedTileRange_ &&\n this.renderedTileRange_.equals(tileRange) &&\n this.renderedRevision_ == tileSource.getRevision()) {\n framebufferExtent = this.renderedFramebufferExtent_;\n } else {\n\n const tileRangeSize = tileRange.getSize();\n\n const maxDimension = Math.max(\n tileRangeSize[0] * tilePixelSize[0],\n tileRangeSize[1] * tilePixelSize[1]);\n const framebufferDimension = roundUpToPowerOfTwo(maxDimension);\n const framebufferExtentDimension = tilePixelResolution * framebufferDimension;\n const origin = tileGrid.getOrigin(z);\n const minX = origin[0] +\n tileRange.minX * tilePixelSize[0] * tilePixelResolution;\n const minY = origin[1] +\n tileRange.minY * tilePixelSize[1] * tilePixelResolution;\n framebufferExtent = [\n minX, minY,\n minX + framebufferExtentDimension, minY + framebufferExtentDimension\n ];\n\n this.bindFramebuffer(frameState, framebufferDimension);\n gl.viewport(0, 0, framebufferDimension, framebufferDimension);\n\n gl.clearColor(0, 0, 0, 0);\n gl.clear(COLOR_BUFFER_BIT);\n gl.disable(BLEND);\n\n const program = context.getProgram(this.fragmentShader_, this.vertexShader_);\n context.useProgram(program);\n if (!this.locations_) {\n this.locations_ = new Locations(gl, program);\n }\n\n context.bindBuffer(ARRAY_BUFFER, this.renderArrayBuffer_);\n gl.enableVertexAttribArray(this.locations_.a_position);\n gl.vertexAttribPointer(\n this.locations_.a_position, 2, FLOAT, false, 16, 0);\n gl.enableVertexAttribArray(this.locations_.a_texCoord);\n gl.vertexAttribPointer(\n this.locations_.a_texCoord, 2, FLOAT, false, 16, 8);\n gl.uniform1i(this.locations_.u_texture, 0);\n\n /**\n * @type {Object.<number, Object.<string, module:ol/Tile>>}\n */\n const tilesToDrawByZ = {};\n tilesToDrawByZ[z] = {};\n\n const findLoadedTiles = this.createLoadedTileFinder(\n tileSource, projection, tilesToDrawByZ);\n\n const useInterimTilesOnError = tileLayer.getUseInterimTilesOnError();\n let allTilesLoaded = true;\n const tmpExtent = createEmpty();\n const tmpTileRange = new TileRange(0, 0, 0, 0);\n let childTileRange, drawable, fullyLoaded, tile, tileState;\n let x, y, tileExtent;\n for (x = tileRange.minX; x <= tileRange.maxX; ++x) {\n for (y = tileRange.minY; y <= tileRange.maxY; ++y) {\n\n tile = tileSource.getTile(z, x, y, pixelRatio, projection);\n if (layerState.extent !== undefined) {\n // ignore tiles outside layer extent\n tileExtent = tileGrid.getTileCoordExtent(tile.tileCoord, tmpExtent);\n if (!intersects(tileExtent, layerState.extent)) {\n continue;\n }\n }\n tileState = tile.getState();\n drawable = tileState == TileState.LOADED ||\n tileState == TileState.EMPTY ||\n tileState == TileState.ERROR && !useInterimTilesOnError;\n if (!drawable) {\n tile = tile.getInterimTile();\n }\n tileState = tile.getState();\n if (tileState == TileState.LOADED) {\n if (mapRenderer.isTileTextureLoaded(tile)) {\n tilesToDrawByZ[z][tile.tileCoord.toString()] = tile;\n continue;\n }\n } else if (tileState == TileState.EMPTY ||\n (tileState == TileState.ERROR &&\n !useInterimTilesOnError)) {\n continue;\n }\n\n allTilesLoaded = false;\n fullyLoaded = tileGrid.forEachTileCoordParentTileRange(\n tile.tileCoord, findLoadedTiles, null, tmpTileRange, tmpExtent);\n if (!fullyLoaded) {\n childTileRange = tileGrid.getTileCoordChildTileRange(\n tile.tileCoord, tmpTileRange, tmpExtent);\n if (childTileRange) {\n findLoadedTiles(z + 1, childTileRange);\n }\n }\n\n }\n\n }\n\n /** @type {Array.<number>} */\n const zs = Object.keys(tilesToDrawByZ).map(Number);\n zs.sort(numberSafeCompareFunction);\n const u_tileOffset = new Float32Array(4);\n for (let i = 0, ii = zs.length; i < ii; ++i) {\n const tilesToDraw = tilesToDrawByZ[zs[i]];\n for (const tileKey in tilesToDraw) {\n tile = tilesToDraw[tileKey];\n tileExtent = tileGrid.getTileCoordExtent(tile.tileCoord, tmpExtent);\n u_tileOffset[0] = 2 * (tileExtent[2] - tileExtent[0]) /\n framebufferExtentDimension;\n u_tileOffset[1] = 2 * (tileExtent[3] - tileExtent[1]) /\n framebufferExtentDimension;\n u_tileOffset[2] = 2 * (tileExtent[0] - framebufferExtent[0]) /\n framebufferExtentDimension - 1;\n u_tileOffset[3] = 2 * (tileExtent[1] - framebufferExtent[1]) /\n framebufferExtentDimension - 1;\n gl.uniform4fv(this.locations_.u_tileOffset, u_tileOffset);\n mapRenderer.bindTileTexture(tile, tilePixelSize,\n tileGutter * pixelRatio, LINEAR, LINEAR);\n gl.drawArrays(TRIANGLE_STRIP, 0, 4);\n }\n }\n\n if (allTilesLoaded) {\n this.renderedTileRange_ = tileRange;\n this.renderedFramebufferExtent_ = framebufferExtent;\n this.renderedRevision_ = tileSource.getRevision();\n } else {\n this.renderedTileRange_ = null;\n this.renderedFramebufferExtent_ = null;\n this.renderedRevision_ = -1;\n frameState.animate = true;\n }\n\n }\n\n this.updateUsedTiles(frameState.usedTiles, tileSource, z, tileRange);\n const tileTextureQueue = mapRenderer.getTileTextureQueue();\n this.manageTilePyramid(\n frameState, tileSource, tileGrid, pixelRatio, projection, extent, z,\n tileLayer.getPreload(),\n /**\n * @param {module:ol/Tile} tile Tile.\n */\n function(tile) {\n if (tile.getState() == TileState.LOADED &&\n !mapRenderer.isTileTextureLoaded(tile) &&\n !tileTextureQueue.isKeyQueued(tile.getKey())) {\n tileTextureQueue.enqueue([\n tile,\n tileGrid.getTileCoordCenter(tile.tileCoord),\n tileGrid.getResolution(tile.tileCoord[0]),\n tilePixelSize, tileGutter * pixelRatio\n ]);\n }\n }, this);\n this.scheduleExpireCache(frameState, tileSource);\n\n const texCoordMatrix = this.texCoordMatrix;\n resetTransform(texCoordMatrix);\n translateTransform(texCoordMatrix,\n (Math.round(center[0] / tileResolution) * tileResolution - framebufferExtent[0]) /\n (framebufferExtent[2] - framebufferExtent[0]),\n (Math.round(center[1] / tileResolution) * tileResolution - framebufferExtent[1]) /\n (framebufferExtent[3] - framebufferExtent[1]));\n if (viewState.rotation !== 0) {\n rotateTransform(texCoordMatrix, viewState.rotation);\n }\n scaleTransform(texCoordMatrix,\n frameState.size[0] * viewState.resolution /\n (framebufferExtent[2] - framebufferExtent[0]),\n frameState.size[1] * viewState.resolution /\n (framebufferExtent[3] - framebufferExtent[1]));\n translateTransform(texCoordMatrix, -0.5, -0.5);\n\n return true;\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLTileLayerRenderer.prototype.forEachLayerAtPixel = function(pixel, frameState, callback, thisArg) {\n if (!this.framebuffer) {\n return undefined;\n }\n\n const pixelOnMapScaled = [\n pixel[0] / frameState.size[0],\n (frameState.size[1] - pixel[1]) / frameState.size[1]];\n\n const pixelOnFrameBufferScaled = applyTransform(\n this.texCoordMatrix, pixelOnMapScaled.slice());\n const pixelOnFrameBuffer = [\n pixelOnFrameBufferScaled[0] * this.framebufferDimension,\n pixelOnFrameBufferScaled[1] * this.framebufferDimension];\n\n const gl = this.mapRenderer.getContext().getGL();\n gl.bindFramebuffer(gl.FRAMEBUFFER, this.framebuffer);\n const imageData = new Uint8Array(4);\n gl.readPixels(pixelOnFrameBuffer[0], pixelOnFrameBuffer[1], 1, 1,\n gl.RGBA, gl.UNSIGNED_BYTE, imageData);\n\n if (imageData[3] > 0) {\n return callback.call(thisArg, this.getLayer(), imageData);\n } else {\n return undefined;\n }\n};\nexport default WebGLTileLayerRenderer;\n","/**\n * @module ol/renderer/webgl/VectorLayer\n */\nimport {getUid, inherits} from '../../util.js';\nimport LayerType from '../../LayerType.js';\nimport ViewHint from '../../ViewHint.js';\nimport {buffer, containsExtent, createEmpty} from '../../extent.js';\nimport WebGLReplayGroup from '../../render/webgl/ReplayGroup.js';\nimport {defaultOrder as defaultRenderOrder, getTolerance as getRenderTolerance, getSquaredTolerance as getSquaredRenderTolerance, renderFeature} from '../vector.js';\nimport WebGLLayerRenderer from '../webgl/Layer.js';\nimport {apply as applyTransform} from '../../transform.js';\n\n/**\n * @constructor\n * @extends {module:ol/renderer/webgl/Layer}\n * @param {module:ol/renderer/webgl/Map} mapRenderer Map renderer.\n * @param {module:ol/layer/Vector} vectorLayer Vector layer.\n * @api\n */\nconst WebGLVectorLayerRenderer = function(mapRenderer, vectorLayer) {\n\n WebGLLayerRenderer.call(this, mapRenderer, vectorLayer);\n\n /**\n * @private\n * @type {boolean}\n */\n this.dirty_ = false;\n\n /**\n * @private\n * @type {number}\n */\n this.renderedRevision_ = -1;\n\n /**\n * @private\n * @type {number}\n */\n this.renderedResolution_ = NaN;\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.renderedExtent_ = createEmpty();\n\n /**\n * @private\n * @type {function(module:ol/Feature, module:ol/Feature): number|null}\n */\n this.renderedRenderOrder_ = null;\n\n /**\n * @private\n * @type {module:ol/render/webgl/ReplayGroup}\n */\n this.replayGroup_ = null;\n\n /**\n * The last layer state.\n * @private\n * @type {?module:ol/layer/Layer~State}\n */\n this.layerState_ = null;\n\n};\n\ninherits(WebGLVectorLayerRenderer, WebGLLayerRenderer);\n\n\n/**\n * Determine if this renderer handles the provided layer.\n * @param {module:ol/layer/Layer} layer The candidate layer.\n * @return {boolean} The renderer can render the layer.\n */\nWebGLVectorLayerRenderer['handles'] = function(layer) {\n return layer.getType() === LayerType.VECTOR;\n};\n\n\n/**\n * Create a layer renderer.\n * @param {module:ol/renderer/Map} mapRenderer The map renderer.\n * @param {module:ol/layer/Layer} layer The layer to be rendererd.\n * @return {module:ol/renderer/webgl/VectorLayer} The layer renderer.\n */\nWebGLVectorLayerRenderer['create'] = function(mapRenderer, layer) {\n return new WebGLVectorLayerRenderer(\n /** @type {module:ol/renderer/webgl/Map} */ (mapRenderer),\n /** @type {module:ol/layer/Vector} */ (layer)\n );\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLVectorLayerRenderer.prototype.composeFrame = function(frameState, layerState, context) {\n this.layerState_ = layerState;\n const viewState = frameState.viewState;\n const replayGroup = this.replayGroup_;\n const size = frameState.size;\n const pixelRatio = frameState.pixelRatio;\n const gl = this.mapRenderer.getGL();\n if (replayGroup && !replayGroup.isEmpty()) {\n gl.enable(gl.SCISSOR_TEST);\n gl.scissor(0, 0, size[0] * pixelRatio, size[1] * pixelRatio);\n replayGroup.replay(context,\n viewState.center, viewState.resolution, viewState.rotation,\n size, pixelRatio, layerState.opacity,\n layerState.managed ? frameState.skippedFeatureUids : {});\n gl.disable(gl.SCISSOR_TEST);\n }\n\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLVectorLayerRenderer.prototype.disposeInternal = function() {\n const replayGroup = this.replayGroup_;\n if (replayGroup) {\n const context = this.mapRenderer.getContext();\n replayGroup.getDeleteResourcesFunction(context)();\n this.replayGroup_ = null;\n }\n WebGLLayerRenderer.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLVectorLayerRenderer.prototype.forEachFeatureAtCoordinate = function(coordinate, frameState, hitTolerance, callback, thisArg) {\n if (!this.replayGroup_ || !this.layerState_) {\n return undefined;\n } else {\n const context = this.mapRenderer.getContext();\n const viewState = frameState.viewState;\n const layer = this.getLayer();\n const layerState = this.layerState_;\n /** @type {!Object.<string, boolean>} */\n const features = {};\n return this.replayGroup_.forEachFeatureAtCoordinate(coordinate,\n context, viewState.center, viewState.resolution, viewState.rotation,\n frameState.size, frameState.pixelRatio, layerState.opacity,\n {},\n /**\n * @param {module:ol/Feature|module:ol/render/Feature} feature Feature.\n * @return {?} Callback result.\n */\n function(feature) {\n const key = getUid(feature).toString();\n if (!(key in features)) {\n features[key] = true;\n return callback.call(thisArg, feature, layer);\n }\n });\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLVectorLayerRenderer.prototype.hasFeatureAtCoordinate = function(coordinate, frameState) {\n if (!this.replayGroup_ || !this.layerState_) {\n return false;\n } else {\n const context = this.mapRenderer.getContext();\n const viewState = frameState.viewState;\n const layerState = this.layerState_;\n return this.replayGroup_.hasFeatureAtCoordinate(coordinate,\n context, viewState.center, viewState.resolution, viewState.rotation,\n frameState.size, frameState.pixelRatio, layerState.opacity,\n frameState.skippedFeatureUids);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLVectorLayerRenderer.prototype.forEachLayerAtPixel = function(pixel, frameState, callback, thisArg) {\n const coordinate = applyTransform(\n frameState.pixelToCoordinateTransform, pixel.slice());\n const hasFeature = this.hasFeatureAtCoordinate(coordinate, frameState);\n\n if (hasFeature) {\n return callback.call(thisArg, this.getLayer(), null);\n } else {\n return undefined;\n }\n};\n\n\n/**\n * Handle changes in image style state.\n * @param {module:ol/events/Event} event Image style change event.\n * @private\n */\nWebGLVectorLayerRenderer.prototype.handleStyleImageChange_ = function(event) {\n this.renderIfReadyAndVisible();\n};\n\n\n/**\n * @inheritDoc\n */\nWebGLVectorLayerRenderer.prototype.prepareFrame = function(frameState, layerState, context) {\n const vectorLayer = /** @type {module:ol/layer/Vector} */ (this.getLayer());\n const vectorSource = vectorLayer.getSource();\n\n const animating = frameState.viewHints[ViewHint.ANIMATING];\n const interacting = frameState.viewHints[ViewHint.INTERACTING];\n const updateWhileAnimating = vectorLayer.getUpdateWhileAnimating();\n const updateWhileInteracting = vectorLayer.getUpdateWhileInteracting();\n\n if (!this.dirty_ && (!updateWhileAnimating && animating) ||\n (!updateWhileInteracting && interacting)) {\n return true;\n }\n\n const frameStateExtent = frameState.extent;\n const viewState = frameState.viewState;\n const projection = viewState.projection;\n const resolution = viewState.resolution;\n const pixelRatio = frameState.pixelRatio;\n const vectorLayerRevision = vectorLayer.getRevision();\n const vectorLayerRenderBuffer = vectorLayer.getRenderBuffer();\n let vectorLayerRenderOrder = vectorLayer.getRenderOrder();\n\n if (vectorLayerRenderOrder === undefined) {\n vectorLayerRenderOrder = defaultRenderOrder;\n }\n\n const extent = buffer(frameStateExtent,\n vectorLayerRenderBuffer * resolution);\n\n if (!this.dirty_ &&\n this.renderedResolution_ == resolution &&\n this.renderedRevision_ == vectorLayerRevision &&\n this.renderedRenderOrder_ == vectorLayerRenderOrder &&\n containsExtent(this.renderedExtent_, extent)) {\n return true;\n }\n\n if (this.replayGroup_) {\n frameState.postRenderFunctions.push(\n this.replayGroup_.getDeleteResourcesFunction(context));\n }\n\n this.dirty_ = false;\n\n const replayGroup = new WebGLReplayGroup(\n getRenderTolerance(resolution, pixelRatio),\n extent, vectorLayer.getRenderBuffer());\n vectorSource.loadFeatures(extent, resolution, projection);\n /**\n * @param {module:ol/Feature} feature Feature.\n * @this {module:ol/renderer/webgl/VectorLayer}\n */\n const render = function(feature) {\n let styles;\n const styleFunction = feature.getStyleFunction() || vectorLayer.getStyleFunction();\n if (styleFunction) {\n styles = styleFunction(feature, resolution);\n }\n if (styles) {\n const dirty = this.renderFeature(\n feature, resolution, pixelRatio, styles, replayGroup);\n this.dirty_ = this.dirty_ || dirty;\n }\n };\n if (vectorLayerRenderOrder) {\n /** @type {Array.<module:ol/Feature>} */\n const features = [];\n vectorSource.forEachFeatureInExtent(extent,\n /**\n * @param {module:ol/Feature} feature Feature.\n */\n function(feature) {\n features.push(feature);\n }, this);\n features.sort(vectorLayerRenderOrder);\n features.forEach(render.bind(this));\n } else {\n vectorSource.forEachFeatureInExtent(extent, render, this);\n }\n replayGroup.finish(context);\n\n this.renderedResolution_ = resolution;\n this.renderedRevision_ = vectorLayerRevision;\n this.renderedRenderOrder_ = vectorLayerRenderOrder;\n this.renderedExtent_ = extent;\n this.replayGroup_ = replayGroup;\n\n return true;\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {(module:ol/style/Style|Array.<module:ol/style/Style>)} styles The style or array of\n * styles.\n * @param {module:ol/render/webgl/ReplayGroup} replayGroup Replay group.\n * @return {boolean} `true` if an image is loading.\n */\nWebGLVectorLayerRenderer.prototype.renderFeature = function(feature, resolution, pixelRatio, styles, replayGroup) {\n if (!styles) {\n return false;\n }\n let loading = false;\n if (Array.isArray(styles)) {\n for (let i = styles.length - 1, ii = 0; i >= ii; --i) {\n loading = renderFeature(\n replayGroup, feature, styles[i],\n getSquaredRenderTolerance(resolution, pixelRatio),\n this.handleStyleImageChange_, this) || loading;\n }\n } else {\n loading = renderFeature(\n replayGroup, feature, styles,\n getSquaredRenderTolerance(resolution, pixelRatio),\n this.handleStyleImageChange_, this) || loading;\n }\n return loading;\n};\nexport default WebGLVectorLayerRenderer;\n","/**\n * @module ol/WebGLMap\n */\nimport {inherits} from './util.js';\nimport PluggableMap from './PluggableMap.js';\nimport {defaults as defaultControls} from './control.js';\nimport {defaults as defaultInteractions} from './interaction.js';\nimport {assign} from './obj.js';\nimport WebGLImageLayerRenderer from './renderer/webgl/ImageLayer.js';\nimport WebGLMapRenderer from './renderer/webgl/Map.js';\nimport WebGLTileLayerRenderer from './renderer/webgl/TileLayer.js';\nimport WebGLVectorLayerRenderer from './renderer/webgl/VectorLayer.js';\n\n\n/**\n * @classdesc\n * The WebGLMap uses WebGL for rendering map layers. This renderer has limited\n * support for vector data and no support for vector tiles.\n *\n * import WebGLMap from 'ol/WebGLMap';\n * import TileLayer from 'ol/layer/Tile';\n * import OSM from 'ol/source/OSM';\n * import View from 'ol/View';\n *\n * var map = new WebGLMap({\n * view: new View({\n * center: [0, 0],\n * zoom: 1\n * }),\n * layers: [\n * new TileLayer({\n * source: new OSM()\n * })\n * ],\n * target: 'map'\n * });\n *\n * The above snippet creates a map using a {@link module:ol/layer/Tile~Tile} to\n * display {@link module:ol/source/OSM~OSM} OSM data and render it to a DOM\n * element with the id `map`.\n *\n * The constructor places a viewport container (with CSS class name\n * `ol-viewport`) in the target element (see `getViewport()`), and then two\n * further elements within the viewport: one with CSS class name\n * `ol-overlaycontainer-stopevent` for controls and some overlays, and one with\n * CSS class name `ol-overlaycontainer` for other overlays (see the `stopEvent`\n * option of {@link module:ol/Overlay~Overlay} for the difference). The map\n * itself is placed in a further element within the viewport.\n *\n * Layers are stored as a {@link module:ol/Collection~Collection} in\n * layerGroups. A top-level group is provided by the library. This is what is\n * accessed by `getLayerGroup` and `setLayerGroup`. Layers entered in the\n * options are added to this group, and `addLayer` and `removeLayer` change the\n * layer collection in the group. `getLayers` is a convenience function for\n * `getLayerGroup().getLayers()`.\n * Note that {@link module:ol/layer/Group~Group} is a subclass of\n * {@link module:ol/layer/Base}, so layers entered in the options or added\n * with `addLayer` can be groups, which can contain further groups, and so on.\n *\n * @constructor\n * @extends {module:ol/PluggableMap}\n * @param {module:ol/PluggableMap~MapOptions} options Map options.\n * @fires module:ol/MapBrowserEvent~MapBrowserEvent\n * @fires module:ol/MapEvent~MapEvent\n * @fires module:ol/render/Event~RenderEvent#postcompose\n * @fires module:ol/render/Event~RenderEvent#precompose\n * @api\n */\nconst WebGLMap = function(options) {\n options = assign({}, options);\n if (!options.controls) {\n options.controls = defaultControls();\n }\n if (!options.interactions) {\n options.interactions = defaultInteractions();\n }\n\n PluggableMap.call(this, options);\n};\n\ninherits(WebGLMap, PluggableMap);\n\n\nWebGLMap.prototype.createRenderer = function() {\n const renderer = new WebGLMapRenderer(this);\n renderer.registerLayerRenderers([\n WebGLImageLayerRenderer,\n WebGLTileLayerRenderer,\n WebGLVectorLayerRenderer\n ]);\n return renderer;\n};\n\nexport default WebGLMap;\n","/**\n * @module ol/control/MousePosition\n */\n\nimport {inherits} from '../util.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getChangeEventType} from '../Object.js';\nimport Control from '../control/Control.js';\nimport {getTransformFromProjections, identityTransform, get as getProjection} from '../proj.js';\n\n\n/**\n * @type {string}\n */\nconst PROJECTION = 'projection';\n\n/**\n * @type {string}\n */\nconst COORDINATE_FORMAT = 'coordinateFormat';\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [className='ol-mouse-position'] CSS class name.\n * @property {module:ol/coordinate~CoordinateFormat} [coordinateFormat] Coordinate format.\n * @property {module:ol/proj~ProjectionLike} projection Projection.\n * @property {function(module:ol/MapEvent)} [render] Function called when the\n * control should be re-rendered. This is called in a `requestAnimationFrame`\n * callback.\n * @property {Element|string} [target] Specify a target if you want the\n * control to be rendered outside of the map's viewport.\n * @property {string} [undefinedHTML=' '] Markup to show when coordinates are not\n * available (e.g. when the pointer leaves the map viewport). By default, the last position\n * will be replaced with `' '` when the pointer leaves the viewport. To\n * retain the last rendered position, set this option to something falsey (like an empty\n * string `''`).\n */\n\n\n/**\n * @classdesc\n * A control to show the 2D coordinates of the mouse cursor. By default, these\n * are in the view projection, but can be in any supported projection.\n * By default the control is shown in the top right corner of the map, but this\n * can be changed by using the css selector `.ol-mouse-position`.\n *\n * @constructor\n * @extends {module:ol/control/Control}\n * @param {module:ol/control/MousePosition~Options=} opt_options Mouse position\n * options.\n * @api\n */\nconst MousePosition = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n const element = document.createElement('DIV');\n element.className = options.className !== undefined ? options.className : 'ol-mouse-position';\n\n Control.call(this, {\n element: element,\n render: options.render || render,\n target: options.target\n });\n\n listen(this,\n getChangeEventType(PROJECTION),\n this.handleProjectionChanged_, this);\n\n if (options.coordinateFormat) {\n this.setCoordinateFormat(options.coordinateFormat);\n }\n if (options.projection) {\n this.setProjection(options.projection);\n }\n\n /**\n * @private\n * @type {string}\n */\n this.undefinedHTML_ = 'undefinedHTML' in options ? options.undefinedHTML : ' ';\n\n /**\n * @private\n * @type {boolean}\n */\n this.renderOnMouseOut_ = !!this.undefinedHTML_;\n\n /**\n * @private\n * @type {string}\n */\n this.renderedHTML_ = element.innerHTML;\n\n /**\n * @private\n * @type {module:ol/proj/Projection}\n */\n this.mapProjection_ = null;\n\n /**\n * @private\n * @type {?module:ol/proj~TransformFunction}\n */\n this.transform_ = null;\n\n /**\n * @private\n * @type {module:ol~Pixel}\n */\n this.lastMouseMovePixel_ = null;\n\n};\n\ninherits(MousePosition, Control);\n\n\n/**\n * Update the mouseposition element.\n * @param {module:ol/MapEvent} mapEvent Map event.\n * @this {module:ol/control/MousePosition}\n * @api\n */\nexport function render(mapEvent) {\n const frameState = mapEvent.frameState;\n if (!frameState) {\n this.mapProjection_ = null;\n } else {\n if (this.mapProjection_ != frameState.viewState.projection) {\n this.mapProjection_ = frameState.viewState.projection;\n this.transform_ = null;\n }\n }\n this.updateHTML_(this.lastMouseMovePixel_);\n}\n\n\n/**\n * @private\n */\nMousePosition.prototype.handleProjectionChanged_ = function() {\n this.transform_ = null;\n};\n\n\n/**\n * Return the coordinate format type used to render the current position or\n * undefined.\n * @return {module:ol/coordinate~CoordinateFormat|undefined} The format to render the current\n * position in.\n * @observable\n * @api\n */\nMousePosition.prototype.getCoordinateFormat = function() {\n return (\n /** @type {module:ol/coordinate~CoordinateFormat|undefined} */ (this.get(COORDINATE_FORMAT))\n );\n};\n\n\n/**\n * Return the projection that is used to report the mouse position.\n * @return {module:ol/proj/Projection|undefined} The projection to report mouse\n * position in.\n * @observable\n * @api\n */\nMousePosition.prototype.getProjection = function() {\n return (\n /** @type {module:ol/proj/Projection|undefined} */ (this.get(PROJECTION))\n );\n};\n\n\n/**\n * @param {Event} event Browser event.\n * @protected\n */\nMousePosition.prototype.handleMouseMove = function(event) {\n const map = this.getMap();\n this.lastMouseMovePixel_ = map.getEventPixel(event);\n this.updateHTML_(this.lastMouseMovePixel_);\n};\n\n\n/**\n * @param {Event} event Browser event.\n * @protected\n */\nMousePosition.prototype.handleMouseOut = function(event) {\n this.updateHTML_(null);\n this.lastMouseMovePixel_ = null;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nMousePosition.prototype.setMap = function(map) {\n Control.prototype.setMap.call(this, map);\n if (map) {\n const viewport = map.getViewport();\n this.listenerKeys.push(\n listen(viewport, EventType.MOUSEMOVE, this.handleMouseMove, this)\n );\n if (this.renderOnMouseOut_) {\n this.listenerKeys.push(\n listen(viewport, EventType.MOUSEOUT, this.handleMouseOut, this)\n );\n }\n }\n};\n\n\n/**\n * Set the coordinate format type used to render the current position.\n * @param {module:ol/coordinate~CoordinateFormat} format The format to render the current\n * position in.\n * @observable\n * @api\n */\nMousePosition.prototype.setCoordinateFormat = function(format) {\n this.set(COORDINATE_FORMAT, format);\n};\n\n\n/**\n * Set the projection that is used to report the mouse position.\n * @param {module:ol/proj~ProjectionLike} projection The projection to report mouse\n * position in.\n * @observable\n * @api\n */\nMousePosition.prototype.setProjection = function(projection) {\n this.set(PROJECTION, getProjection(projection));\n};\n\n\n/**\n * @param {?module:ol~Pixel} pixel Pixel.\n * @private\n */\nMousePosition.prototype.updateHTML_ = function(pixel) {\n let html = this.undefinedHTML_;\n if (pixel && this.mapProjection_) {\n if (!this.transform_) {\n const projection = this.getProjection();\n if (projection) {\n this.transform_ = getTransformFromProjections(\n this.mapProjection_, projection);\n } else {\n this.transform_ = identityTransform;\n }\n }\n const map = this.getMap();\n const coordinate = map.getCoordinateFromPixel(pixel);\n if (coordinate) {\n this.transform_(coordinate, coordinate);\n const coordinateFormat = this.getCoordinateFormat();\n if (coordinateFormat) {\n html = coordinateFormat(coordinate);\n } else {\n html = coordinate.toString();\n }\n }\n }\n if (!this.renderedHTML_ || html !== this.renderedHTML_) {\n this.element.innerHTML = html;\n this.renderedHTML_ = html;\n }\n};\n\n\nexport default MousePosition;\n","/**\n * @module ol/format/Feature\n */\nimport Geometry from '../geom/Geometry.js';\nimport {assign} from '../obj.js';\nimport {get as getProjection, equivalent as equivalentProjection, transformExtent} from '../proj.js';\n\n\n/**\n * @typedef {Object} ReadOptions\n * @property {module:ol/proj~ProjectionLike} dataProjection Projection of the data we are reading.\n * If not provided, the projection will be derived from the data (where possible) or\n * the `dataProjection` of the format is assigned (where set). If the projection\n * can not be derived from the data and if no `dataProjection` is set for a format,\n * the features will not be reprojected.\n * @property {module:ol/extent~Extent} extent Tile extent of the tile being read. This is only used and\n * required for {@link module:ol/format/MVT}.\n * @property {module:ol/proj~ProjectionLike} featureProjection Projection of the feature geometries\n * created by the format reader. If not provided, features will be returned in the\n * `dataProjection`.\n */\n\n\n/**\n * @typedef {Object} WriteOptions\n * @property {module:ol/proj~ProjectionLike} dataProjection Projection of the data we are writing.\n * If not provided, the `dataProjection` of the format is assigned (where set).\n * If no `dataProjection` is set for a format, the features will be returned\n * in the `featureProjection`.\n * @property {module:ol/proj~ProjectionLike} featureProjection Projection of the feature geometries\n * that will be serialized by the format writer. If not provided, geometries are assumed\n * to be in the `dataProjection` if that is set; in other words, they are not transformed.\n * @property {boolean} [rightHanded] When writing geometries, follow the right-hand\n * rule for linear ring orientation. This means that polygons will have counter-clockwise\n * exterior rings and clockwise interior rings. By default, coordinates are serialized\n * as they are provided at construction. If `true`, the right-hand rule will\n * be applied. If `false`, the left-hand rule will be applied (clockwise for\n * exterior and counter-clockwise for interior rings). Note that not all\n * formats support this. The GeoJSON format does use this property when writing\n * geometries.\n * @property {number} [decimals] Maximum number of decimal places for coordinates.\n * Coordinates are stored internally as floats, but floating-point arithmetic can create\n * coordinates with a large number of decimal places, not generally wanted on output.\n * Set a number here to round coordinates. Can also be used to ensure that\n * coordinates read in can be written back out with the same number of decimals.\n * Default is no rounding.\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for feature formats.\n * {module:ol/format/Feature~FeatureFormat} subclasses provide the ability to decode and encode\n * {@link module:ol/Feature~Feature} objects from a variety of commonly used geospatial\n * file formats. See the documentation for each format for more details.\n *\n * @constructor\n * @abstract\n * @api\n */\nconst FeatureFormat = function() {\n\n /**\n * @protected\n * @type {module:ol/proj/Projection}\n */\n this.dataProjection = null;\n\n /**\n * @protected\n * @type {module:ol/proj/Projection}\n */\n this.defaultFeatureProjection = null;\n\n};\n\n\n/**\n * Adds the data projection to the read options.\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Options.\n * @return {module:ol/format/Feature~ReadOptions|undefined} Options.\n * @protected\n */\nFeatureFormat.prototype.getReadOptions = function(source, opt_options) {\n let options;\n if (opt_options) {\n options = {\n dataProjection: opt_options.dataProjection ?\n opt_options.dataProjection : this.readProjection(source),\n featureProjection: opt_options.featureProjection\n };\n }\n return this.adaptOptions(options);\n};\n\n\n/**\n * Sets the `dataProjection` on the options, if no `dataProjection`\n * is set.\n * @param {module:ol/format/Feature~WriteOptions|module:ol/format/Feature~ReadOptions|undefined} options\n * Options.\n * @protected\n * @return {module:ol/format/Feature~WriteOptions|module:ol/format/Feature~ReadOptions|undefined}\n * Updated options.\n */\nFeatureFormat.prototype.adaptOptions = function(options) {\n return assign({\n dataProjection: this.dataProjection,\n featureProjection: this.defaultFeatureProjection\n }, options);\n};\n\n\n/**\n * Get the extent from the source of the last {@link readFeatures} call.\n * @return {module:ol/extent~Extent} Tile extent.\n */\nFeatureFormat.prototype.getLastExtent = function() {\n return null;\n};\n\n\n/**\n * @abstract\n * @return {module:ol/format/FormatType} Format.\n */\nFeatureFormat.prototype.getType = function() {};\n\n\n/**\n * Read a single feature from a source.\n *\n * @abstract\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/Feature} Feature.\n */\nFeatureFormat.prototype.readFeature = function(source, opt_options) {};\n\n\n/**\n * Read all features from a source.\n *\n * @abstract\n * @param {Document|Node|ArrayBuffer|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {Array.<module:ol/Feature>} Features.\n */\nFeatureFormat.prototype.readFeatures = function(source, opt_options) {};\n\n\n/**\n * Read a single geometry from a source.\n *\n * @abstract\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/geom/Geometry} Geometry.\n */\nFeatureFormat.prototype.readGeometry = function(source, opt_options) {};\n\n\n/**\n * Read the projection from a source.\n *\n * @abstract\n * @param {Document|Node|Object|string} source Source.\n * @return {module:ol/proj/Projection} Projection.\n */\nFeatureFormat.prototype.readProjection = function(source) {};\n\n\n/**\n * Encode a feature in this format.\n *\n * @abstract\n * @param {module:ol/Feature} feature Feature.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} Result.\n */\nFeatureFormat.prototype.writeFeature = function(feature, opt_options) {};\n\n\n/**\n * Encode an array of features in this format.\n *\n * @abstract\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} Result.\n */\nFeatureFormat.prototype.writeFeatures = function(features, opt_options) {};\n\n\n/**\n * Write a single geometry in this format.\n *\n * @abstract\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} Result.\n */\nFeatureFormat.prototype.writeGeometry = function(geometry, opt_options) {};\n\nexport default FeatureFormat;\n\n/**\n * @param {module:ol/geom/Geometry|module:ol/extent~Extent} geometry Geometry.\n * @param {boolean} write Set to true for writing, false for reading.\n * @param {(module:ol/format/Feature~WriteOptions|module:ol/format/Feature~ReadOptions)=} opt_options\n * Options.\n * @return {module:ol/geom/Geometry|module:ol/extent~Extent} Transformed geometry.\n */\nexport function transformWithOptions(geometry, write, opt_options) {\n const featureProjection = opt_options ?\n getProjection(opt_options.featureProjection) : null;\n const dataProjection = opt_options ?\n getProjection(opt_options.dataProjection) : null;\n /**\n * @type {module:ol/geom/Geometry|module:ol/extent~Extent}\n */\n let transformed;\n if (featureProjection && dataProjection &&\n !equivalentProjection(featureProjection, dataProjection)) {\n if (geometry instanceof Geometry) {\n transformed = (write ? geometry.clone() : geometry).transform(\n write ? featureProjection : dataProjection,\n write ? dataProjection : featureProjection);\n } else {\n // FIXME this is necessary because GML treats extents\n // as geometries\n transformed = transformExtent(\n geometry,\n dataProjection,\n featureProjection);\n }\n } else {\n transformed = geometry;\n }\n if (write && opt_options && opt_options.decimals !== undefined) {\n const power = Math.pow(10, opt_options.decimals);\n // if decimals option on write, round each coordinate appropriately\n /**\n * @param {Array.<number>} coordinates Coordinates.\n * @return {Array.<number>} Transformed coordinates.\n */\n const transform = function(coordinates) {\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n coordinates[i] = Math.round(coordinates[i] * power) / power;\n }\n return coordinates;\n };\n if (transformed === geometry) {\n transformed = transformed.clone();\n }\n transformed.applyTransform(transform);\n }\n return transformed;\n}\n","/**\n * @module ol/format/JSONFeature\n */\nimport {inherits} from '../util.js';\nimport FeatureFormat from '../format/Feature.js';\nimport FormatType from '../format/FormatType.js';\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for JSON feature formats.\n *\n * @constructor\n * @abstract\n * @extends {module:ol/format/Feature}\n */\nconst JSONFeature = function() {\n FeatureFormat.call(this);\n};\n\ninherits(JSONFeature, FeatureFormat);\n\n\n/**\n * @param {Document|Node|Object|string} source Source.\n * @return {Object} Object.\n */\nfunction getObject(source) {\n if (typeof source === 'string') {\n const object = JSON.parse(source);\n return object ? /** @type {Object} */ (object) : null;\n } else if (source !== null) {\n return source;\n } else {\n return null;\n }\n}\n\n\n/**\n * @inheritDoc\n */\nJSONFeature.prototype.getType = function() {\n return FormatType.JSON;\n};\n\n\n/**\n * @inheritDoc\n */\nJSONFeature.prototype.readFeature = function(source, opt_options) {\n return this.readFeatureFromObject(\n getObject(source), this.getReadOptions(source, opt_options));\n};\n\n\n/**\n * @inheritDoc\n */\nJSONFeature.prototype.readFeatures = function(source, opt_options) {\n return this.readFeaturesFromObject(\n getObject(source), this.getReadOptions(source, opt_options));\n};\n\n\n/**\n * @abstract\n * @param {Object} object Object.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @protected\n * @return {module:ol/Feature} Feature.\n */\nJSONFeature.prototype.readFeatureFromObject = function(object, opt_options) {};\n\n\n/**\n * @abstract\n * @param {Object} object Object.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @protected\n * @return {Array.<module:ol/Feature>} Features.\n */\nJSONFeature.prototype.readFeaturesFromObject = function(object, opt_options) {};\n\n\n/**\n * @inheritDoc\n */\nJSONFeature.prototype.readGeometry = function(source, opt_options) {\n return this.readGeometryFromObject(\n getObject(source), this.getReadOptions(source, opt_options));\n};\n\n\n/**\n * @abstract\n * @param {Object} object Object.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @protected\n * @return {module:ol/geom/Geometry} Geometry.\n */\nJSONFeature.prototype.readGeometryFromObject = function(object, opt_options) {};\n\n\n/**\n * @inheritDoc\n */\nJSONFeature.prototype.readProjection = function(source) {\n return this.readProjectionFromObject(getObject(source));\n};\n\n\n/**\n * @abstract\n * @param {Object} object Object.\n * @protected\n * @return {module:ol/proj/Projection} Projection.\n */\nJSONFeature.prototype.readProjectionFromObject = function(object) {};\n\n\n/**\n * @inheritDoc\n */\nJSONFeature.prototype.writeFeature = function(feature, opt_options) {\n return JSON.stringify(this.writeFeatureObject(feature, opt_options));\n};\n\n\n/**\n * @abstract\n * @param {module:ol/Feature} feature Feature.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {Object} Object.\n */\nJSONFeature.prototype.writeFeatureObject = function(feature, opt_options) {};\n\n\n/**\n * @inheritDoc\n */\nJSONFeature.prototype.writeFeatures = function(features, opt_options) {\n return JSON.stringify(this.writeFeaturesObject(features, opt_options));\n};\n\n\n/**\n * @abstract\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {Object} Object.\n */\nJSONFeature.prototype.writeFeaturesObject = function(features, opt_options) {};\n\n\n/**\n * @inheritDoc\n */\nJSONFeature.prototype.writeGeometry = function(geometry, opt_options) {\n return JSON.stringify(this.writeGeometryObject(geometry, opt_options));\n};\n\n\n/**\n * @abstract\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {Object} Object.\n */\nJSONFeature.prototype.writeGeometryObject = function(geometry, opt_options) {};\nexport default JSONFeature;\n","/**\n * @module ol/format/EsriJSON\n */\nimport {inherits} from '../util.js';\nimport Feature from '../Feature.js';\nimport {assert} from '../asserts.js';\nimport {containsExtent} from '../extent.js';\nimport {transformWithOptions} from '../format/Feature.js';\nimport JSONFeature from '../format/JSONFeature.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport LineString from '../geom/LineString.js';\nimport LinearRing from '../geom/LinearRing.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {deflateCoordinates} from '../geom/flat/deflate.js';\nimport {linearRingIsClockwise} from '../geom/flat/orient.js';\nimport {assign, isEmpty} from '../obj.js';\nimport {get as getProjection} from '../proj.js';\n\n\n/**\n * @const\n * @type {Object.<module:ol/geom/GeometryType, function(EsriJSONGeometry): module:ol/geom/Geometry>}\n */\nconst GEOMETRY_READERS = {};\nGEOMETRY_READERS[GeometryType.POINT] = readPointGeometry;\nGEOMETRY_READERS[GeometryType.LINE_STRING] = readLineStringGeometry;\nGEOMETRY_READERS[GeometryType.POLYGON] = readPolygonGeometry;\nGEOMETRY_READERS[GeometryType.MULTI_POINT] = readMultiPointGeometry;\nGEOMETRY_READERS[GeometryType.MULTI_LINE_STRING] = readMultiLineStringGeometry;\nGEOMETRY_READERS[GeometryType.MULTI_POLYGON] = readMultiPolygonGeometry;\n\n\n/**\n * @const\n * @type {Object.<string, function(module:ol/geom/Geometry, module:ol/format/Feature~WriteOptions=): (EsriJSONGeometry)>}\n */\nconst GEOMETRY_WRITERS = {};\nGEOMETRY_WRITERS[GeometryType.POINT] = writePointGeometry;\nGEOMETRY_WRITERS[GeometryType.LINE_STRING] = writeLineStringGeometry;\nGEOMETRY_WRITERS[GeometryType.POLYGON] = writePolygonGeometry;\nGEOMETRY_WRITERS[GeometryType.MULTI_POINT] = writeMultiPointGeometry;\nGEOMETRY_WRITERS[GeometryType.MULTI_LINE_STRING] = writeMultiLineStringGeometry;\nGEOMETRY_WRITERS[GeometryType.MULTI_POLYGON] = writeMultiPolygonGeometry;\n\n\n/**\n * @typedef {Object} Options\n * @property {string} [geometryName] Geometry name to use when creating features.\n */\n\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the EsriJSON format.\n *\n * @constructor\n * @extends {module:ol/format/JSONFeature}\n * @param {module:ol/format/EsriJSON~Options=} opt_options Options.\n * @api\n */\nconst EsriJSON = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n JSONFeature.call(this);\n\n /**\n * Name of the geometry attribute for features.\n * @type {string|undefined}\n * @private\n */\n this.geometryName_ = options.geometryName;\n\n};\n\ninherits(EsriJSON, JSONFeature);\n\n\n/**\n * @param {EsriJSONGeometry} object Object.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/geom/Geometry} Geometry.\n */\nfunction readGeometry(object, opt_options) {\n if (!object) {\n return null;\n }\n /** @type {module:ol/geom/GeometryType} */\n let type;\n if (typeof object.x === 'number' && typeof object.y === 'number') {\n type = GeometryType.POINT;\n } else if (object.points) {\n type = GeometryType.MULTI_POINT;\n } else if (object.paths) {\n if (object.paths.length === 1) {\n type = GeometryType.LINE_STRING;\n } else {\n type = GeometryType.MULTI_LINE_STRING;\n }\n } else if (object.rings) {\n const layout = getGeometryLayout(object);\n const rings = convertRings(object.rings, layout);\n object = /** @type {EsriJSONGeometry} */(assign({}, object));\n if (rings.length === 1) {\n type = GeometryType.POLYGON;\n object.rings = rings[0];\n } else {\n type = GeometryType.MULTI_POLYGON;\n object.rings = rings;\n }\n }\n const geometryReader = GEOMETRY_READERS[type];\n return (\n /** @type {module:ol/geom/Geometry} */ (transformWithOptions(geometryReader(object), false, opt_options))\n );\n}\n\n\n/**\n * Determines inner and outer rings.\n * Checks if any polygons in this array contain any other polygons in this\n * array. It is used for checking for holes.\n * Logic inspired by: https://github.com/Esri/terraformer-arcgis-parser\n * @param {Array.<!Array.<!Array.<number>>>} rings Rings.\n * @param {module:ol/geom/GeometryLayout} layout Geometry layout.\n * @return {Array.<!Array.<!Array.<number>>>} Transformed rings.\n */\nfunction convertRings(rings, layout) {\n const flatRing = [];\n const outerRings = [];\n const holes = [];\n let i, ii;\n for (i = 0, ii = rings.length; i < ii; ++i) {\n flatRing.length = 0;\n deflateCoordinates(flatRing, 0, rings[i], layout.length);\n // is this ring an outer ring? is it clockwise?\n const clockwise = linearRingIsClockwise(flatRing, 0,\n flatRing.length, layout.length);\n if (clockwise) {\n outerRings.push([rings[i]]);\n } else {\n holes.push(rings[i]);\n }\n }\n while (holes.length) {\n const hole = holes.shift();\n let matched = false;\n // loop over all outer rings and see if they contain our hole.\n for (i = outerRings.length - 1; i >= 0; i--) {\n const outerRing = outerRings[i][0];\n const containsHole = containsExtent(\n new LinearRing(outerRing).getExtent(),\n new LinearRing(hole).getExtent()\n );\n if (containsHole) {\n // the hole is contained push it into our polygon\n outerRings[i].push(hole);\n matched = true;\n break;\n }\n }\n if (!matched) {\n // no outer rings contain this hole turn it into and outer\n // ring (reverse it)\n outerRings.push([hole.reverse()]);\n }\n }\n return outerRings;\n}\n\n\n/**\n * @param {EsriJSONGeometry} object Object.\n * @return {module:ol/geom/Geometry} Point.\n */\nfunction readPointGeometry(object) {\n let point;\n if (object.m !== undefined && object.z !== undefined) {\n point = new Point([object.x, object.y, object.z, object.m],\n GeometryLayout.XYZM);\n } else if (object.z !== undefined) {\n point = new Point([object.x, object.y, object.z],\n GeometryLayout.XYZ);\n } else if (object.m !== undefined) {\n point = new Point([object.x, object.y, object.m],\n GeometryLayout.XYM);\n } else {\n point = new Point([object.x, object.y]);\n }\n return point;\n}\n\n\n/**\n * @param {EsriJSONGeometry} object Object.\n * @return {module:ol/geom/Geometry} LineString.\n */\nfunction readLineStringGeometry(object) {\n const layout = getGeometryLayout(object);\n return new LineString(object.paths[0], layout);\n}\n\n\n/**\n * @param {EsriJSONGeometry} object Object.\n * @return {module:ol/geom/Geometry} MultiLineString.\n */\nfunction readMultiLineStringGeometry(object) {\n const layout = getGeometryLayout(object);\n return new MultiLineString(object.paths, layout);\n}\n\n\n/**\n * @param {EsriJSONGeometry} object Object.\n * @return {module:ol/geom/GeometryLayout} The geometry layout to use.\n */\nfunction getGeometryLayout(object) {\n let layout = GeometryLayout.XY;\n if (object.hasZ === true && object.hasM === true) {\n layout = GeometryLayout.XYZM;\n } else if (object.hasZ === true) {\n layout = GeometryLayout.XYZ;\n } else if (object.hasM === true) {\n layout = GeometryLayout.XYM;\n }\n return layout;\n}\n\n\n/**\n * @param {EsriJSONGeometry} object Object.\n * @return {module:ol/geom/Geometry} MultiPoint.\n */\nfunction readMultiPointGeometry(object) {\n const layout = getGeometryLayout(object);\n return new MultiPoint(object.points, layout);\n}\n\n\n/**\n * @param {EsriJSONGeometry} object Object.\n * @return {module:ol/geom/Geometry} MultiPolygon.\n */\nfunction readMultiPolygonGeometry(object) {\n const layout = getGeometryLayout(object);\n return new MultiPolygon(\n /** @type {Array.<Array.<Array.<Array.<number>>>>} */(object.rings),\n layout);\n}\n\n\n/**\n * @param {EsriJSONGeometry} object Object.\n * @return {module:ol/geom/Geometry} Polygon.\n */\nfunction readPolygonGeometry(object) {\n const layout = getGeometryLayout(object);\n return new Polygon(object.rings, layout);\n}\n\n\n/**\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {EsriJSONGeometry} EsriJSON geometry.\n */\nfunction writePointGeometry(geometry, opt_options) {\n const coordinates = /** @type {module:ol/geom/Point} */ (geometry).getCoordinates();\n let esriJSON;\n const layout = /** @type {module:ol/geom/Point} */ (geometry).getLayout();\n if (layout === GeometryLayout.XYZ) {\n esriJSON = /** @type {EsriJSONPoint} */ ({\n x: coordinates[0],\n y: coordinates[1],\n z: coordinates[2]\n });\n } else if (layout === GeometryLayout.XYM) {\n esriJSON = /** @type {EsriJSONPoint} */ ({\n x: coordinates[0],\n y: coordinates[1],\n m: coordinates[2]\n });\n } else if (layout === GeometryLayout.XYZM) {\n esriJSON = /** @type {EsriJSONPoint} */ ({\n x: coordinates[0],\n y: coordinates[1],\n z: coordinates[2],\n m: coordinates[3]\n });\n } else if (layout === GeometryLayout.XY) {\n esriJSON = /** @type {EsriJSONPoint} */ ({\n x: coordinates[0],\n y: coordinates[1]\n });\n } else {\n assert(false, 34); // Invalid geometry layout\n }\n return /** @type {EsriJSONGeometry} */ (esriJSON);\n}\n\n\n/**\n * @param {module:ol/geom/SimpleGeometry} geometry Geometry.\n * @return {Object} Object with boolean hasZ and hasM keys.\n */\nfunction getHasZM(geometry) {\n const layout = geometry.getLayout();\n return {\n hasZ: (layout === GeometryLayout.XYZ ||\n layout === GeometryLayout.XYZM),\n hasM: (layout === GeometryLayout.XYM ||\n layout === GeometryLayout.XYZM)\n };\n}\n\n\n/**\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {EsriJSONPolyline} EsriJSON geometry.\n */\nfunction writeLineStringGeometry(geometry, opt_options) {\n const hasZM = getHasZM(/** @type {module:ol/geom/LineString} */(geometry));\n return (\n /** @type {EsriJSONPolyline} */ {\n hasZ: hasZM.hasZ,\n hasM: hasZM.hasM,\n paths: [\n /** @type {module:ol/geom/LineString} */ (geometry).getCoordinates()\n ]\n }\n );\n}\n\n\n/**\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {EsriJSONPolygon} EsriJSON geometry.\n */\nfunction writePolygonGeometry(geometry, opt_options) {\n // Esri geometries use the left-hand rule\n const hasZM = getHasZM(/** @type {module:ol/geom/Polygon} */(geometry));\n return (\n /** @type {EsriJSONPolygon} */ {\n hasZ: hasZM.hasZ,\n hasM: hasZM.hasM,\n rings: /** @type {module:ol/geom/Polygon} */ (geometry).getCoordinates(false)\n }\n );\n}\n\n\n/**\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {EsriJSONPolyline} EsriJSON geometry.\n */\nfunction writeMultiLineStringGeometry(geometry, opt_options) {\n const hasZM = getHasZM(/** @type {module:ol/geom/MultiLineString} */(geometry));\n return (\n /** @type {EsriJSONPolyline} */ {\n hasZ: hasZM.hasZ,\n hasM: hasZM.hasM,\n paths: /** @type {module:ol/geom/MultiLineString} */ (geometry).getCoordinates()\n }\n );\n}\n\n\n/**\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {EsriJSONMultipoint} EsriJSON geometry.\n */\nfunction writeMultiPointGeometry(geometry, opt_options) {\n const hasZM = getHasZM(/** @type {module:ol/geom/MultiPoint} */(geometry));\n return (\n /** @type {EsriJSONMultipoint} */ {\n hasZ: hasZM.hasZ,\n hasM: hasZM.hasM,\n points: /** @type {module:ol/geom/MultiPoint} */ (geometry).getCoordinates()\n }\n );\n}\n\n\n/**\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {EsriJSONPolygon} EsriJSON geometry.\n */\nfunction writeMultiPolygonGeometry(geometry, opt_options) {\n const hasZM = getHasZM(/** @type {module:ol/geom/MultiPolygon} */(geometry));\n const coordinates = /** @type {module:ol/geom/MultiPolygon} */ (geometry).getCoordinates(false);\n const output = [];\n for (let i = 0; i < coordinates.length; i++) {\n for (let x = coordinates[i].length - 1; x >= 0; x--) {\n output.push(coordinates[i][x]);\n }\n }\n return /** @type {EsriJSONPolygon} */ ({\n hasZ: hasZM.hasZ,\n hasM: hasZM.hasM,\n rings: output\n });\n}\n\n\n/**\n * Read a feature from a EsriJSON Feature source. Only works for Feature,\n * use `readFeatures` to read FeatureCollection source.\n *\n * @function\n * @param {ArrayBuffer|Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/Feature} Feature.\n * @api\n */\nEsriJSON.prototype.readFeature;\n\n\n/**\n * Read all features from a EsriJSON source. Works with both Feature and\n * FeatureCollection sources.\n *\n * @function\n * @param {ArrayBuffer|Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nEsriJSON.prototype.readFeatures;\n\n\n/**\n * @inheritDoc\n */\nEsriJSON.prototype.readFeatureFromObject = function(object, opt_options) {\n const esriJSONFeature = /** @type {EsriJSONFeature} */ (object);\n const geometry = readGeometry(esriJSONFeature.geometry, opt_options);\n const feature = new Feature();\n if (this.geometryName_) {\n feature.setGeometryName(this.geometryName_);\n }\n feature.setGeometry(geometry);\n if (opt_options && opt_options.idField &&\n esriJSONFeature.attributes[opt_options.idField]) {\n feature.setId(/** @type {number} */(esriJSONFeature.attributes[opt_options.idField]));\n }\n if (esriJSONFeature.attributes) {\n feature.setProperties(esriJSONFeature.attributes);\n }\n return feature;\n};\n\n\n/**\n * @inheritDoc\n */\nEsriJSON.prototype.readFeaturesFromObject = function(object, opt_options) {\n const esriJSONObject = /** @type {EsriJSONObject} */ (object);\n const options = opt_options ? opt_options : {};\n if (esriJSONObject.features) {\n const esriJSONFeatureCollection = /** @type {EsriJSONFeatureCollection} */ (object);\n /** @type {Array.<module:ol/Feature>} */\n const features = [];\n const esriJSONFeatures = esriJSONFeatureCollection.features;\n options.idField = object.objectIdFieldName;\n for (let i = 0, ii = esriJSONFeatures.length; i < ii; ++i) {\n features.push(this.readFeatureFromObject(esriJSONFeatures[i], options));\n }\n return features;\n } else {\n return [this.readFeatureFromObject(object, options)];\n }\n};\n\n\n/**\n * Read a geometry from a EsriJSON source.\n *\n * @function\n * @param {ArrayBuffer|Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/geom/Geometry} Geometry.\n * @api\n */\nEsriJSON.prototype.readGeometry;\n\n\n/**\n * @inheritDoc\n */\nEsriJSON.prototype.readGeometryFromObject = function(object, opt_options) {\n return readGeometry(/** @type {EsriJSONGeometry} */(object), opt_options);\n};\n\n\n/**\n * Read the projection from a EsriJSON source.\n *\n * @function\n * @param {ArrayBuffer|Document|Node|Object|string} source Source.\n * @return {module:ol/proj/Projection} Projection.\n * @api\n */\nEsriJSON.prototype.readProjection;\n\n\n/**\n * @inheritDoc\n */\nEsriJSON.prototype.readProjectionFromObject = function(object) {\n const esriJSONObject = /** @type {EsriJSONObject} */ (object);\n if (esriJSONObject.spatialReference && esriJSONObject.spatialReference.wkid) {\n const crs = esriJSONObject.spatialReference.wkid;\n return getProjection('EPSG:' + crs);\n } else {\n return null;\n }\n};\n\n\n/**\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {EsriJSONGeometry} EsriJSON geometry.\n */\nfunction writeGeometry(geometry, opt_options) {\n const geometryWriter = GEOMETRY_WRITERS[geometry.getType()];\n return geometryWriter(/** @type {module:ol/geom/Geometry} */(\n transformWithOptions(geometry, true, opt_options)), opt_options);\n}\n\n\n/**\n * Encode a geometry as a EsriJSON string.\n *\n * @function\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} EsriJSON.\n * @api\n */\nEsriJSON.prototype.writeGeometry;\n\n\n/**\n * Encode a geometry as a EsriJSON object.\n *\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {EsriJSONGeometry} Object.\n * @override\n * @api\n */\nEsriJSON.prototype.writeGeometryObject = function(geometry, opt_options) {\n return writeGeometry(geometry, this.adaptOptions(opt_options));\n};\n\n\n/**\n * Encode a feature as a EsriJSON Feature string.\n *\n * @function\n * @param {module:ol/Feature} feature Feature.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} EsriJSON.\n * @api\n */\nEsriJSON.prototype.writeFeature;\n\n\n/**\n * Encode a feature as a esriJSON Feature object.\n *\n * @param {module:ol/Feature} feature Feature.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {Object} Object.\n * @override\n * @api\n */\nEsriJSON.prototype.writeFeatureObject = function(feature, opt_options) {\n opt_options = this.adaptOptions(opt_options);\n const object = {};\n const geometry = feature.getGeometry();\n if (geometry) {\n object['geometry'] = writeGeometry(geometry, opt_options);\n if (opt_options && opt_options.featureProjection) {\n object['geometry']['spatialReference'] = /** @type {EsriJSONCRS} */({\n wkid: getProjection(opt_options.featureProjection).getCode().split(':').pop()\n });\n }\n }\n const properties = feature.getProperties();\n delete properties[feature.getGeometryName()];\n if (!isEmpty(properties)) {\n object['attributes'] = properties;\n } else {\n object['attributes'] = {};\n }\n return object;\n};\n\n\n/**\n * Encode an array of features as EsriJSON.\n *\n * @function\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} EsriJSON.\n * @api\n */\nEsriJSON.prototype.writeFeatures;\n\n\n/**\n * Encode an array of features as a EsriJSON object.\n *\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {Object} EsriJSON Object.\n * @override\n * @api\n */\nEsriJSON.prototype.writeFeaturesObject = function(features, opt_options) {\n opt_options = this.adaptOptions(opt_options);\n const objects = [];\n for (let i = 0, ii = features.length; i < ii; ++i) {\n objects.push(this.writeFeatureObject(features[i], opt_options));\n }\n return /** @type {EsriJSONFeatureCollection} */ ({\n 'features': objects\n });\n};\n\nexport default EsriJSON;\n","/**\n * @module ol/xml\n */\nimport {extend} from './array.js';\n\n\n/**\n * When using {@link module:ol/xml~makeChildAppender} or\n * {@link module:ol/xml~makeSimpleNodeFactory}, the top `objectStack` item needs\n * to have this structure.\n * @typedef {Object} NodeStackItem\n * @property {Node} node\n */\n\n\n/**\n * @typedef {function(Node, Array.<*>)} Parser\n */\n\n\n/**\n * @typedef {function(Node, *, Array.<*>)} Serializer\n */\n\n\n/**\n * This document should be used when creating nodes for XML serializations. This\n * document is also used by {@link module:ol/xml~createElementNS}\n * @const\n * @type {Document}\n */\nexport const DOCUMENT = document.implementation.createDocument('', '', null);\n\n\n/**\n * @type {string}\n */\nexport const XML_SCHEMA_INSTANCE_URI = 'http://www.w3.org/2001/XMLSchema-instance';\n\n\n/**\n * @param {string} namespaceURI Namespace URI.\n * @param {string} qualifiedName Qualified name.\n * @return {Node} Node.\n */\nexport function createElementNS(namespaceURI, qualifiedName) {\n return DOCUMENT.createElementNS(namespaceURI, qualifiedName);\n}\n\n\n/**\n * Recursively grab all text content of child nodes into a single string.\n * @param {Node} node Node.\n * @param {boolean} normalizeWhitespace Normalize whitespace: remove all line\n * breaks.\n * @return {string} All text content.\n * @api\n */\nexport function getAllTextContent(node, normalizeWhitespace) {\n return getAllTextContent_(node, normalizeWhitespace, []).join('');\n}\n\n\n/**\n * Recursively grab all text content of child nodes into a single string.\n * @param {Node} node Node.\n * @param {boolean} normalizeWhitespace Normalize whitespace: remove all line\n * breaks.\n * @param {Array.<string>} accumulator Accumulator.\n * @private\n * @return {Array.<string>} Accumulator.\n */\nexport function getAllTextContent_(node, normalizeWhitespace, accumulator) {\n if (node.nodeType == Node.CDATA_SECTION_NODE ||\n node.nodeType == Node.TEXT_NODE) {\n if (normalizeWhitespace) {\n accumulator.push(String(node.nodeValue).replace(/(\\r\\n|\\r|\\n)/g, ''));\n } else {\n accumulator.push(node.nodeValue);\n }\n } else {\n let n;\n for (n = node.firstChild; n; n = n.nextSibling) {\n getAllTextContent_(n, normalizeWhitespace, accumulator);\n }\n }\n return accumulator;\n}\n\n\n/**\n * @param {?} value Value.\n * @return {boolean} Is document.\n */\nexport function isDocument(value) {\n return value instanceof Document;\n}\n\n\n/**\n * @param {?} value Value.\n * @return {boolean} Is node.\n */\nexport function isNode(value) {\n return value instanceof Node;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {?string} namespaceURI Namespace URI.\n * @param {string} name Attribute name.\n * @return {string} Value\n */\nexport function getAttributeNS(node, namespaceURI, name) {\n return node.getAttributeNS(namespaceURI, name) || '';\n}\n\n\n/**\n * Parse an XML string to an XML Document.\n * @param {string} xml XML.\n * @return {Document} Document.\n * @api\n */\nexport function parse(xml) {\n return new DOMParser().parseFromString(xml, 'application/xml');\n}\n\n\n/**\n * Make an array extender function for extending the array at the top of the\n * object stack.\n * @param {function(this: T, Node, Array.<*>): (Array.<*>|undefined)}\n * valueReader Value reader.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {module:ol/xml~Parser} Parser.\n * @template T\n */\nexport function makeArrayExtender(valueReader, opt_this) {\n return (\n /**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\n function(node, objectStack) {\n const value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n if (value !== undefined) {\n const array = /** @type {Array.<*>} */ (objectStack[objectStack.length - 1]);\n extend(array, value);\n }\n }\n );\n}\n\n\n/**\n * Make an array pusher function for pushing to the array at the top of the\n * object stack.\n * @param {function(this: T, Node, Array.<*>): *} valueReader Value reader.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {module:ol/xml~Parser} Parser.\n * @template T\n */\nexport function makeArrayPusher(valueReader, opt_this) {\n return (\n /**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\n function(node, objectStack) {\n const value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n if (value !== undefined) {\n const array = /** @type {Array.<*>} */ (objectStack[objectStack.length - 1]);\n array.push(value);\n }\n });\n}\n\n\n/**\n * Make an object stack replacer function for replacing the object at the\n * top of the stack.\n * @param {function(this: T, Node, Array.<*>): *} valueReader Value reader.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {module:ol/xml~Parser} Parser.\n * @template T\n */\nexport function makeReplacer(valueReader, opt_this) {\n return (\n /**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\n function(node, objectStack) {\n const value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n if (value !== undefined) {\n objectStack[objectStack.length - 1] = value;\n }\n });\n}\n\n\n/**\n * Make an object property pusher function for adding a property to the\n * object at the top of the stack.\n * @param {function(this: T, Node, Array.<*>): *} valueReader Value reader.\n * @param {string=} opt_property Property.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {module:ol/xml~Parser} Parser.\n * @template T\n */\nexport function makeObjectPropertyPusher(valueReader, opt_property, opt_this) {\n return (\n /**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\n function(node, objectStack) {\n const value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n if (value !== undefined) {\n const object = /** @type {!Object} */ (objectStack[objectStack.length - 1]);\n const property = opt_property !== undefined ? opt_property : node.localName;\n let array;\n if (property in object) {\n array = object[property];\n } else {\n array = object[property] = [];\n }\n array.push(value);\n }\n });\n}\n\n\n/**\n * Make an object property setter function.\n * @param {function(this: T, Node, Array.<*>): *} valueReader Value reader.\n * @param {string=} opt_property Property.\n * @param {T=} opt_this The object to use as `this` in `valueReader`.\n * @return {module:ol/xml~Parser} Parser.\n * @template T\n */\nexport function makeObjectPropertySetter(valueReader, opt_property, opt_this) {\n return (\n /**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\n function(node, objectStack) {\n const value = valueReader.call(opt_this !== undefined ? opt_this : this, node, objectStack);\n if (value !== undefined) {\n const object = /** @type {!Object} */ (objectStack[objectStack.length - 1]);\n const property = opt_property !== undefined ? opt_property : node.localName;\n object[property] = value;\n }\n });\n}\n\n\n/**\n * Create a serializer that appends nodes written by its `nodeWriter` to its\n * designated parent. The parent is the `node` of the\n * {@link module:ol/xml~NodeStackItem} at the top of the `objectStack`.\n * @param {function(this: T, Node, V, Array.<*>)}\n * nodeWriter Node writer.\n * @param {T=} opt_this The object to use as `this` in `nodeWriter`.\n * @return {module:ol/xml~Serializer} Serializer.\n * @template T, V\n */\nexport function makeChildAppender(nodeWriter, opt_this) {\n return function(node, value, objectStack) {\n nodeWriter.call(opt_this !== undefined ? opt_this : this, node, value, objectStack);\n const parent = /** @type {module:ol/xml~NodeStackItem} */ (objectStack[objectStack.length - 1]);\n const parentNode = parent.node;\n parentNode.appendChild(node);\n };\n}\n\n\n/**\n * Create a serializer that calls the provided `nodeWriter` from\n * {@link module:ol/xml~serialize}. This can be used by the parent writer to have the\n * 'nodeWriter' called with an array of values when the `nodeWriter` was\n * designed to serialize a single item. An example would be a LineString\n * geometry writer, which could be reused for writing MultiLineString\n * geometries.\n * @param {function(this: T, Node, V, Array.<*>)}\n * nodeWriter Node writer.\n * @param {T=} opt_this The object to use as `this` in `nodeWriter`.\n * @return {module:ol/xml~Serializer} Serializer.\n * @template T, V\n */\nexport function makeArraySerializer(nodeWriter, opt_this) {\n let serializersNS, nodeFactory;\n return function(node, value, objectStack) {\n if (serializersNS === undefined) {\n serializersNS = {};\n const serializers = {};\n serializers[node.localName] = nodeWriter;\n serializersNS[node.namespaceURI] = serializers;\n nodeFactory = makeSimpleNodeFactory(node.localName);\n }\n serialize(serializersNS, nodeFactory, value, objectStack);\n };\n}\n\n\n/**\n * Create a node factory which can use the `opt_keys` passed to\n * {@link module:ol/xml~serialize} or {@link module:ol/xml~pushSerializeAndPop} as node names,\n * or a fixed node name. The namespace of the created nodes can either be fixed,\n * or the parent namespace will be used.\n * @param {string=} opt_nodeName Fixed node name which will be used for all\n * created nodes. If not provided, the 3rd argument to the resulting node\n * factory needs to be provided and will be the nodeName.\n * @param {string=} opt_namespaceURI Fixed namespace URI which will be used for\n * all created nodes. If not provided, the namespace of the parent node will\n * be used.\n * @return {function(*, Array.<*>, string=): (Node|undefined)} Node factory.\n */\nexport function makeSimpleNodeFactory(opt_nodeName, opt_namespaceURI) {\n const fixedNodeName = opt_nodeName;\n return (\n /**\n * @param {*} value Value.\n * @param {Array.<*>} objectStack Object stack.\n * @param {string=} opt_nodeName Node name.\n * @return {Node} Node.\n */\n function(value, objectStack, opt_nodeName) {\n const context = /** @type {module:ol/xml~NodeStackItem} */ (objectStack[objectStack.length - 1]);\n const node = context.node;\n let nodeName = fixedNodeName;\n if (nodeName === undefined) {\n nodeName = opt_nodeName;\n }\n\n const namespaceURI = opt_namespaceURI !== undefined ? opt_namespaceURI : node.namespaceURI;\n return createElementNS(namespaceURI, /** @type {string} */ (nodeName));\n }\n );\n}\n\n\n/**\n * A node factory that creates a node using the parent's `namespaceURI` and the\n * `nodeName` passed by {@link module:ol/xml~serialize} or\n * {@link module:ol/xml~pushSerializeAndPop} to the node factory.\n * @const\n * @type {function(*, Array.<*>, string=): (Node|undefined)}\n */\nexport const OBJECT_PROPERTY_NODE_FACTORY = makeSimpleNodeFactory();\n\n\n/**\n * Create an array of `values` to be used with {@link module:ol/xml~serialize} or\n * {@link module:ol/xml~pushSerializeAndPop}, where `orderedKeys` has to be provided as\n * `opt_key` argument.\n * @param {Object.<string, V>} object Key-value pairs for the sequence. Keys can\n * be a subset of the `orderedKeys`.\n * @param {Array.<string>} orderedKeys Keys in the order of the sequence.\n * @return {Array.<V>} Values in the order of the sequence. The resulting array\n * has the same length as the `orderedKeys` array. Values that are not\n * present in `object` will be `undefined` in the resulting array.\n * @template V\n */\nexport function makeSequence(object, orderedKeys) {\n const length = orderedKeys.length;\n const sequence = new Array(length);\n for (let i = 0; i < length; ++i) {\n sequence[i] = object[orderedKeys[i]];\n }\n return sequence;\n}\n\n\n/**\n * Create a namespaced structure, using the same values for each namespace.\n * This can be used as a starting point for versioned parsers, when only a few\n * values are version specific.\n * @param {Array.<string>} namespaceURIs Namespace URIs.\n * @param {T} structure Structure.\n * @param {Object.<string, T>=} opt_structureNS Namespaced structure to add to.\n * @return {Object.<string, T>} Namespaced structure.\n * @template T\n */\nexport function makeStructureNS(namespaceURIs, structure, opt_structureNS) {\n /**\n * @type {Object.<string, T>}\n */\n const structureNS = opt_structureNS !== undefined ? opt_structureNS : {};\n let i, ii;\n for (i = 0, ii = namespaceURIs.length; i < ii; ++i) {\n structureNS[namespaceURIs[i]] = structure;\n }\n return structureNS;\n}\n\n\n/**\n * Parse a node using the parsers and object stack.\n * @param {Object.<string, Object.<string, module:ol/xml~Parser>>} parsersNS\n * Parsers by namespace.\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @param {*=} opt_this The object to use as `this`.\n */\nexport function parseNode(parsersNS, node, objectStack, opt_this) {\n let n;\n for (n = node.firstElementChild; n; n = n.nextElementSibling) {\n const parsers = parsersNS[n.namespaceURI];\n if (parsers !== undefined) {\n const parser = parsers[n.localName];\n if (parser !== undefined) {\n parser.call(opt_this, n, objectStack);\n }\n }\n }\n}\n\n\n/**\n * Push an object on top of the stack, parse and return the popped object.\n * @param {T} object Object.\n * @param {Object.<string, Object.<string, module:ol/xml~Parser>>} parsersNS\n * Parsers by namespace.\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @param {*=} opt_this The object to use as `this`.\n * @return {T} Object.\n * @template T\n */\nexport function pushParseAndPop(object, parsersNS, node, objectStack, opt_this) {\n objectStack.push(object);\n parseNode(parsersNS, node, objectStack, opt_this);\n return /** @type {T} */ (objectStack.pop());\n}\n\n\n/**\n * Walk through an array of `values` and call a serializer for each value.\n * @param {Object.<string, Object.<string, module:ol/xml~Serializer>>} serializersNS\n * Namespaced serializers.\n * @param {function(this: T, *, Array.<*>, (string|undefined)): (Node|undefined)} nodeFactory\n * Node factory. The `nodeFactory` creates the node whose namespace and name\n * will be used to choose a node writer from `serializersNS`. This\n * separation allows us to decide what kind of node to create, depending on\n * the value we want to serialize. An example for this would be different\n * geometry writers based on the geometry type.\n * @param {Array.<*>} values Values to serialize. An example would be an array\n * of {@link module:ol/Feature~Feature} instances.\n * @param {Array.<*>} objectStack Node stack.\n * @param {Array.<string>=} opt_keys Keys of the `values`. Will be passed to the\n * `nodeFactory`. This is used for serializing object literals where the\n * node name relates to the property key. The array length of `opt_keys` has\n * to match the length of `values`. For serializing a sequence, `opt_keys`\n * determines the order of the sequence.\n * @param {T=} opt_this The object to use as `this` for the node factory and\n * serializers.\n * @template T\n */\nexport function serialize(\n serializersNS, nodeFactory, values, objectStack, opt_keys, opt_this) {\n const length = (opt_keys !== undefined ? opt_keys : values).length;\n let value, node;\n for (let i = 0; i < length; ++i) {\n value = values[i];\n if (value !== undefined) {\n node = nodeFactory.call(opt_this !== undefined ? opt_this : this, value, objectStack,\n opt_keys !== undefined ? opt_keys[i] : undefined);\n if (node !== undefined) {\n serializersNS[node.namespaceURI][node.localName]\n .call(opt_this, node, value, objectStack);\n }\n }\n }\n}\n\n\n/**\n * @param {O} object Object.\n * @param {Object.<string, Object.<string, module:ol/xml~Serializer>>} serializersNS\n * Namespaced serializers.\n * @param {function(this: T, *, Array.<*>, (string|undefined)): (Node|undefined)} nodeFactory\n * Node factory. The `nodeFactory` creates the node whose namespace and name\n * will be used to choose a node writer from `serializersNS`. This\n * separation allows us to decide what kind of node to create, depending on\n * the value we want to serialize. An example for this would be different\n * geometry writers based on the geometry type.\n * @param {Array.<*>} values Values to serialize. An example would be an array\n * of {@link module:ol/Feature~Feature} instances.\n * @param {Array.<*>} objectStack Node stack.\n * @param {Array.<string>=} opt_keys Keys of the `values`. Will be passed to the\n * `nodeFactory`. This is used for serializing object literals where the\n * node name relates to the property key. The array length of `opt_keys` has\n * to match the length of `values`. For serializing a sequence, `opt_keys`\n * determines the order of the sequence.\n * @param {T=} opt_this The object to use as `this` for the node factory and\n * serializers.\n * @return {O|undefined} Object.\n * @template O, T\n */\nexport function pushSerializeAndPop(object, serializersNS, nodeFactory, values, objectStack, opt_keys, opt_this) {\n objectStack.push(object);\n serialize(serializersNS, nodeFactory, values, objectStack, opt_keys, opt_this);\n return /** @type {O|undefined} */ (objectStack.pop());\n}\n","/**\n * @module ol/format/XMLFeature\n */\nimport {inherits} from '../util.js';\nimport {extend} from '../array.js';\nimport FeatureFormat from '../format/Feature.js';\nimport FormatType from '../format/FormatType.js';\nimport {isDocument, isNode, parse} from '../xml.js';\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for XML feature formats.\n *\n * @constructor\n * @abstract\n * @extends {module:ol/format/Feature}\n */\nconst XMLFeature = function() {\n\n /**\n * @type {XMLSerializer}\n * @private\n */\n this.xmlSerializer_ = new XMLSerializer();\n\n FeatureFormat.call(this);\n};\n\ninherits(XMLFeature, FeatureFormat);\n\n\n/**\n * @inheritDoc\n */\nXMLFeature.prototype.getType = function() {\n return FormatType.XML;\n};\n\n\n/**\n * @inheritDoc\n */\nXMLFeature.prototype.readFeature = function(source, opt_options) {\n if (isDocument(source)) {\n return this.readFeatureFromDocument(/** @type {Document} */ (source), opt_options);\n } else if (isNode(source)) {\n return this.readFeatureFromNode(/** @type {Node} */ (source), opt_options);\n } else if (typeof source === 'string') {\n const doc = parse(source);\n return this.readFeatureFromDocument(doc, opt_options);\n } else {\n return null;\n }\n};\n\n\n/**\n * @param {Document} doc Document.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Options.\n * @return {module:ol/Feature} Feature.\n */\nXMLFeature.prototype.readFeatureFromDocument = function(doc, opt_options) {\n const features = this.readFeaturesFromDocument(doc, opt_options);\n if (features.length > 0) {\n return features[0];\n } else {\n return null;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Options.\n * @return {module:ol/Feature} Feature.\n */\nXMLFeature.prototype.readFeatureFromNode = function(node, opt_options) {\n return null; // not implemented\n};\n\n\n/**\n * @inheritDoc\n */\nXMLFeature.prototype.readFeatures = function(source, opt_options) {\n if (isDocument(source)) {\n return this.readFeaturesFromDocument(\n /** @type {Document} */ (source), opt_options);\n } else if (isNode(source)) {\n return this.readFeaturesFromNode(/** @type {Node} */ (source), opt_options);\n } else if (typeof source === 'string') {\n const doc = parse(source);\n return this.readFeaturesFromDocument(doc, opt_options);\n } else {\n return [];\n }\n};\n\n\n/**\n * @param {Document} doc Document.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Options.\n * @protected\n * @return {Array.<module:ol/Feature>} Features.\n */\nXMLFeature.prototype.readFeaturesFromDocument = function(doc, opt_options) {\n /** @type {Array.<module:ol/Feature>} */\n const features = [];\n for (let n = doc.firstChild; n; n = n.nextSibling) {\n if (n.nodeType == Node.ELEMENT_NODE) {\n extend(features, this.readFeaturesFromNode(n, opt_options));\n }\n }\n return features;\n};\n\n\n/**\n * @abstract\n * @param {Node} node Node.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Options.\n * @protected\n * @return {Array.<module:ol/Feature>} Features.\n */\nXMLFeature.prototype.readFeaturesFromNode = function(node, opt_options) {};\n\n\n/**\n * @inheritDoc\n */\nXMLFeature.prototype.readGeometry = function(source, opt_options) {\n if (isDocument(source)) {\n return this.readGeometryFromDocument(\n /** @type {Document} */ (source), opt_options);\n } else if (isNode(source)) {\n return this.readGeometryFromNode(/** @type {Node} */ (source), opt_options);\n } else if (typeof source === 'string') {\n const doc = parse(source);\n return this.readGeometryFromDocument(doc, opt_options);\n } else {\n return null;\n }\n};\n\n\n/**\n * @param {Document} doc Document.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Options.\n * @protected\n * @return {module:ol/geom/Geometry} Geometry.\n */\nXMLFeature.prototype.readGeometryFromDocument = function(doc, opt_options) {\n return null; // not implemented\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Options.\n * @protected\n * @return {module:ol/geom/Geometry} Geometry.\n */\nXMLFeature.prototype.readGeometryFromNode = function(node, opt_options) {\n return null; // not implemented\n};\n\n\n/**\n * @inheritDoc\n */\nXMLFeature.prototype.readProjection = function(source) {\n if (isDocument(source)) {\n return this.readProjectionFromDocument(/** @type {Document} */ (source));\n } else if (isNode(source)) {\n return this.readProjectionFromNode(/** @type {Node} */ (source));\n } else if (typeof source === 'string') {\n const doc = parse(source);\n return this.readProjectionFromDocument(doc);\n } else {\n return null;\n }\n};\n\n\n/**\n * @param {Document} doc Document.\n * @protected\n * @return {module:ol/proj/Projection} Projection.\n */\nXMLFeature.prototype.readProjectionFromDocument = function(doc) {\n return this.dataProjection;\n};\n\n\n/**\n * @param {Node} node Node.\n * @protected\n * @return {module:ol/proj/Projection} Projection.\n */\nXMLFeature.prototype.readProjectionFromNode = function(node) {\n return this.dataProjection;\n};\n\n\n/**\n * @inheritDoc\n */\nXMLFeature.prototype.writeFeature = function(feature, opt_options) {\n const node = this.writeFeatureNode(feature, opt_options);\n return this.xmlSerializer_.serializeToString(node);\n};\n\n\n/**\n * @param {module:ol/Feature} feature Feature.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Options.\n * @protected\n * @return {Node} Node.\n */\nXMLFeature.prototype.writeFeatureNode = function(feature, opt_options) {\n return null; // not implemented\n};\n\n\n/**\n * @inheritDoc\n */\nXMLFeature.prototype.writeFeatures = function(features, opt_options) {\n const node = this.writeFeaturesNode(features, opt_options);\n return this.xmlSerializer_.serializeToString(node);\n};\n\n\n/**\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Options.\n * @return {Node} Node.\n */\nXMLFeature.prototype.writeFeaturesNode = function(features, opt_options) {\n return null; // not implemented\n};\n\n\n/**\n * @inheritDoc\n */\nXMLFeature.prototype.writeGeometry = function(geometry, opt_options) {\n const node = this.writeGeometryNode(geometry, opt_options);\n return this.xmlSerializer_.serializeToString(node);\n};\n\n\n/**\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Options.\n * @return {Node} Node.\n */\nXMLFeature.prototype.writeGeometryNode = function(geometry, opt_options) {\n return null; // not implemented\n};\nexport default XMLFeature;\n","/**\n * @module ol/format/GMLBase\n */\n// FIXME Envelopes should not be treated as geometries! readEnvelope_ is part\n// of GEOMETRY_PARSERS_ and methods using GEOMETRY_PARSERS_ do not expect\n// envelopes/extents, only geometries!\nimport {inherits} from '../util.js';\nimport {extend} from '../array.js';\nimport Feature from '../Feature.js';\nimport {transformWithOptions} from '../format/Feature.js';\nimport XMLFeature from '../format/XMLFeature.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport LineString from '../geom/LineString.js';\nimport LinearRing from '../geom/LinearRing.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {assign} from '../obj.js';\nimport {get as getProjection} from '../proj.js';\nimport {getAllTextContent, getAttributeNS, makeArrayPusher, makeReplacer, parseNode, pushParseAndPop} from '../xml.js';\n\n\n/**\n * @const\n * @type {string}\n */\nexport const GMLNS = 'http://www.opengis.net/gml';\n\n\n/**\n * @typedef {Object} Options\n * @property {Object.<string, string>|string} [featureNS] Feature\n * namespace. If not defined will be derived from GML. If multiple\n * feature types have been configured which come from different feature\n * namespaces, this will be an object with the keys being the prefixes used\n * in the entries of featureType array. The values of the object will be the\n * feature namespaces themselves. So for instance there might be a featureType\n * item `topp:states` in the `featureType` array and then there will be a key\n * `topp` in the featureNS object with value `http://www.openplans.org/topp`.\n * @property {Array.<string>|string} [featureType] Feature type(s) to parse.\n * If multiple feature types need to be configured\n * which come from different feature namespaces, `featureNS` will be an object\n * with the keys being the prefixes used in the entries of featureType array.\n * The values of the object will be the feature namespaces themselves.\n * So for instance there might be a featureType item `topp:states` and then\n * there will be a key named `topp` in the featureNS object with value\n * `http://www.openplans.org/topp`.\n * @property {string} srsName srsName to use when writing geometries.\n * @property {boolean} [surface=false] Write gml:Surface instead of gml:Polygon\n * elements. This also affects the elements in multi-part geometries.\n * @property {boolean} [curve=false] Write gml:Curve instead of gml:LineString\n * elements. This also affects the elements in multi-part geometries.\n * @property {boolean} [multiCurve=true] Write gml:MultiCurve instead of gml:MultiLineString.\n * Since the latter is deprecated in GML 3.\n * @property {boolean} [multiSurface=true] Write gml:multiSurface instead of\n * gml:MultiPolygon. Since the latter is deprecated in GML 3.\n * @property {string} [schemaLocation] Optional schemaLocation to use when\n * writing out the GML, this will override the default provided.\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Feature base format for reading and writing data in the GML format.\n * This class cannot be instantiated, it contains only base content that\n * is shared with versioned format classes GML2 and GML3.\n *\n * @constructor\n * @abstract\n * @param {module:ol/format/GMLBase~Options=} opt_options\n * Optional configuration object.\n * @extends {module:ol/format/XMLFeature}\n */\nconst GMLBase = function(opt_options) {\n const options = /** @type {module:ol/format/GMLBase~Options} */ (opt_options ? opt_options : {});\n\n /**\n * @protected\n * @type {Array.<string>|string|undefined}\n */\n this.featureType = options.featureType;\n\n /**\n * @protected\n * @type {Object.<string, string>|string|undefined}\n */\n this.featureNS = options.featureNS;\n\n /**\n * @protected\n * @type {string}\n */\n this.srsName = options.srsName;\n\n /**\n * @protected\n * @type {string}\n */\n this.schemaLocation = '';\n\n /**\n * @type {Object.<string, Object.<string, Object>>}\n */\n this.FEATURE_COLLECTION_PARSERS = {};\n this.FEATURE_COLLECTION_PARSERS[GMLNS] = {\n 'featureMember': makeReplacer(GMLBase.prototype.readFeaturesInternal),\n 'featureMembers': makeReplacer(GMLBase.prototype.readFeaturesInternal)\n };\n\n XMLFeature.call(this);\n};\n\ninherits(GMLBase, XMLFeature);\n\n\n/**\n * A regular expression that matches if a string only contains whitespace\n * characters. It will e.g. match `''`, `' '`, `'\\n'` etc. The non-breaking\n * space (0xa0) is explicitly included as IE doesn't include it in its\n * definition of `\\s`.\n *\n * Information from `goog.string.isEmptyOrWhitespace`: https://github.com/google/closure-library/blob/e877b1e/closure/goog/string/string.js#L156-L160\n *\n * @const\n * @type {RegExp}\n */\nconst ONLY_WHITESPACE_RE = /^[\\s\\xa0]*$/;\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Array.<module:ol/Feature> | undefined} Features.\n */\nGMLBase.prototype.readFeaturesInternal = function(node, objectStack) {\n const localName = node.localName;\n let features = null;\n if (localName == 'FeatureCollection') {\n if (node.namespaceURI === 'http://www.opengis.net/wfs') {\n features = pushParseAndPop([],\n this.FEATURE_COLLECTION_PARSERS, node,\n objectStack, this);\n } else {\n features = pushParseAndPop(null,\n this.FEATURE_COLLECTION_PARSERS, node,\n objectStack, this);\n }\n } else if (localName == 'featureMembers' || localName == 'featureMember') {\n const context = objectStack[0];\n let featureType = context['featureType'];\n let featureNS = context['featureNS'];\n const prefix = 'p';\n const defaultPrefix = 'p0';\n if (!featureType && node.childNodes) {\n featureType = [], featureNS = {};\n for (let i = 0, ii = node.childNodes.length; i < ii; ++i) {\n const child = node.childNodes[i];\n if (child.nodeType === 1) {\n const ft = child.nodeName.split(':').pop();\n if (featureType.indexOf(ft) === -1) {\n let key = '';\n let count = 0;\n const uri = child.namespaceURI;\n for (const candidate in featureNS) {\n if (featureNS[candidate] === uri) {\n key = candidate;\n break;\n }\n ++count;\n }\n if (!key) {\n key = prefix + count;\n featureNS[key] = uri;\n }\n featureType.push(key + ':' + ft);\n }\n }\n }\n if (localName != 'featureMember') {\n // recheck featureType for each featureMember\n context['featureType'] = featureType;\n context['featureNS'] = featureNS;\n }\n }\n if (typeof featureNS === 'string') {\n const ns = featureNS;\n featureNS = {};\n featureNS[defaultPrefix] = ns;\n }\n const parsersNS = {};\n const featureTypes = Array.isArray(featureType) ? featureType : [featureType];\n for (const p in featureNS) {\n const parsers = {};\n for (let i = 0, ii = featureTypes.length; i < ii; ++i) {\n const featurePrefix = featureTypes[i].indexOf(':') === -1 ?\n defaultPrefix : featureTypes[i].split(':')[0];\n if (featurePrefix === p) {\n parsers[featureTypes[i].split(':').pop()] =\n (localName == 'featureMembers') ?\n makeArrayPusher(this.readFeatureElement, this) :\n makeReplacer(this.readFeatureElement, this);\n }\n }\n parsersNS[featureNS[p]] = parsers;\n }\n if (localName == 'featureMember') {\n features = pushParseAndPop(undefined, parsersNS, node, objectStack);\n } else {\n features = pushParseAndPop([], parsersNS, node, objectStack);\n }\n }\n if (features === null) {\n features = [];\n }\n return features;\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/Geometry|undefined} Geometry.\n */\nGMLBase.prototype.readGeometryElement = function(node, objectStack) {\n const context = /** @type {Object} */ (objectStack[0]);\n context['srsName'] = node.firstElementChild.getAttribute('srsName');\n context['srsDimension'] = node.firstElementChild.getAttribute('srsDimension');\n /** @type {module:ol/geom/Geometry} */\n const geometry = pushParseAndPop(null, this.GEOMETRY_PARSERS_, node, objectStack, this);\n if (geometry) {\n return (\n /** @type {module:ol/geom/Geometry} */ (transformWithOptions(geometry, false, context))\n );\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/Feature} Feature.\n */\nGMLBase.prototype.readFeatureElement = function(node, objectStack) {\n let n;\n const fid = node.getAttribute('fid') || getAttributeNS(node, GMLNS, 'id');\n const values = {};\n let geometryName;\n for (n = node.firstElementChild; n; n = n.nextElementSibling) {\n const localName = n.localName;\n // Assume attribute elements have one child node and that the child\n // is a text or CDATA node (to be treated as text).\n // Otherwise assume it is a geometry node.\n if (n.childNodes.length === 0 ||\n (n.childNodes.length === 1 &&\n (n.firstChild.nodeType === 3 || n.firstChild.nodeType === 4))) {\n let value = getAllTextContent(n, false);\n if (ONLY_WHITESPACE_RE.test(value)) {\n value = undefined;\n }\n values[localName] = value;\n } else {\n // boundedBy is an extent and must not be considered as a geometry\n if (localName !== 'boundedBy') {\n geometryName = localName;\n }\n values[localName] = this.readGeometryElement(n, objectStack);\n }\n }\n const feature = new Feature(values);\n if (geometryName) {\n feature.setGeometryName(geometryName);\n }\n if (fid) {\n feature.setId(fid);\n }\n return feature;\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/Point|undefined} Point.\n */\nGMLBase.prototype.readPoint = function(node, objectStack) {\n const flatCoordinates = this.readFlatCoordinatesFromNode_(node, objectStack);\n if (flatCoordinates) {\n const point = new Point(null);\n point.setFlatCoordinates(GeometryLayout.XYZ, flatCoordinates);\n return point;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/MultiPoint|undefined} MultiPoint.\n */\nGMLBase.prototype.readMultiPoint = function(node, objectStack) {\n /** @type {Array.<Array.<number>>} */\n const coordinates = pushParseAndPop([],\n this.MULTIPOINT_PARSERS_, node, objectStack, this);\n if (coordinates) {\n return new MultiPoint(coordinates);\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/MultiLineString|undefined} MultiLineString.\n */\nGMLBase.prototype.readMultiLineString = function(node, objectStack) {\n /** @type {Array.<module:ol/geom/LineString>} */\n const lineStrings = pushParseAndPop([],\n this.MULTILINESTRING_PARSERS_, node, objectStack, this);\n if (lineStrings) {\n const multiLineString = new MultiLineString(null);\n multiLineString.setLineStrings(lineStrings);\n return multiLineString;\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/MultiPolygon|undefined} MultiPolygon.\n */\nGMLBase.prototype.readMultiPolygon = function(node, objectStack) {\n /** @type {Array.<module:ol/geom/Polygon>} */\n const polygons = pushParseAndPop([], this.MULTIPOLYGON_PARSERS_, node, objectStack, this);\n if (polygons) {\n const multiPolygon = new MultiPolygon(null);\n multiPolygon.setPolygons(polygons);\n return multiPolygon;\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n */\nGMLBase.prototype.pointMemberParser_ = function(node, objectStack) {\n parseNode(this.POINTMEMBER_PARSERS_, node, objectStack, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n */\nGMLBase.prototype.lineStringMemberParser_ = function(node, objectStack) {\n parseNode(this.LINESTRINGMEMBER_PARSERS_, node, objectStack, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n */\nGMLBase.prototype.polygonMemberParser_ = function(node, objectStack) {\n parseNode(this.POLYGONMEMBER_PARSERS_, node, objectStack, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/LineString|undefined} LineString.\n */\nGMLBase.prototype.readLineString = function(node, objectStack) {\n const flatCoordinates = this.readFlatCoordinatesFromNode_(node, objectStack);\n if (flatCoordinates) {\n const lineString = new LineString(null);\n lineString.setFlatCoordinates(GeometryLayout.XYZ, flatCoordinates);\n return lineString;\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {Array.<number>|undefined} LinearRing flat coordinates.\n */\nGMLBase.prototype.readFlatLinearRing_ = function(node, objectStack) {\n const ring = pushParseAndPop(null,\n this.GEOMETRY_FLAT_COORDINATES_PARSERS_, node,\n objectStack, this);\n if (ring) {\n return ring;\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/LinearRing|undefined} LinearRing.\n */\nGMLBase.prototype.readLinearRing = function(node, objectStack) {\n const flatCoordinates = this.readFlatCoordinatesFromNode_(node, objectStack);\n if (flatCoordinates) {\n const ring = new LinearRing(null);\n ring.setFlatCoordinates(GeometryLayout.XYZ, flatCoordinates);\n return ring;\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/Polygon|undefined} Polygon.\n */\nGMLBase.prototype.readPolygon = function(node, objectStack) {\n /** @type {Array.<Array.<number>>} */\n const flatLinearRings = pushParseAndPop([null],\n this.FLAT_LINEAR_RINGS_PARSERS_, node, objectStack, this);\n if (flatLinearRings && flatLinearRings[0]) {\n const polygon = new Polygon(null);\n const flatCoordinates = flatLinearRings[0];\n const ends = [flatCoordinates.length];\n let i, ii;\n for (i = 1, ii = flatLinearRings.length; i < ii; ++i) {\n extend(flatCoordinates, flatLinearRings[i]);\n ends.push(flatCoordinates.length);\n }\n polygon.setFlatCoordinates(GeometryLayout.XYZ, flatCoordinates, ends);\n return polygon;\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {Array.<number>} Flat coordinates.\n */\nGMLBase.prototype.readFlatCoordinatesFromNode_ = function(node, objectStack) {\n return pushParseAndPop(null, this.GEOMETRY_FLAT_COORDINATES_PARSERS_, node, objectStack, this);\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGMLBase.prototype.MULTIPOINT_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'pointMember': makeArrayPusher(GMLBase.prototype.pointMemberParser_),\n 'pointMembers': makeArrayPusher(GMLBase.prototype.pointMemberParser_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGMLBase.prototype.MULTILINESTRING_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'lineStringMember': makeArrayPusher(GMLBase.prototype.lineStringMemberParser_),\n 'lineStringMembers': makeArrayPusher(GMLBase.prototype.lineStringMemberParser_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGMLBase.prototype.MULTIPOLYGON_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'polygonMember': makeArrayPusher(GMLBase.prototype.polygonMemberParser_),\n 'polygonMembers': makeArrayPusher(GMLBase.prototype.polygonMemberParser_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGMLBase.prototype.POINTMEMBER_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'Point': makeArrayPusher(GMLBase.prototype.readFlatCoordinatesFromNode_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGMLBase.prototype.LINESTRINGMEMBER_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'LineString': makeArrayPusher(GMLBase.prototype.readLineString)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGMLBase.prototype.POLYGONMEMBER_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'Polygon': makeArrayPusher(GMLBase.prototype.readPolygon)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @protected\n */\nGMLBase.prototype.RING_PARSERS = {\n 'http://www.opengis.net/gml': {\n 'LinearRing': makeReplacer(GMLBase.prototype.readFlatLinearRing_)\n }\n};\n\n\n/**\n * @inheritDoc\n */\nGMLBase.prototype.readGeometryFromNode = function(node, opt_options) {\n const geometry = this.readGeometryElement(node,\n [this.getReadOptions(node, opt_options ? opt_options : {})]);\n return geometry ? geometry : null;\n};\n\n\n/**\n * Read all features from a GML FeatureCollection.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Options.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nGMLBase.prototype.readFeatures;\n\n\n/**\n * @inheritDoc\n */\nGMLBase.prototype.readFeaturesFromNode = function(node, opt_options) {\n const options = {\n featureType: this.featureType,\n featureNS: this.featureNS\n };\n if (opt_options) {\n assign(options, this.getReadOptions(node, opt_options));\n }\n const features = this.readFeaturesInternal(node, [options]);\n return features || [];\n};\n\n\n/**\n * @inheritDoc\n */\nGMLBase.prototype.readProjectionFromNode = function(node) {\n return getProjection(this.srsName ? this.srsName : node.firstElementChild.getAttribute('srsName'));\n};\nexport default GMLBase;\n","/**\n * @module ol/format/xsd\n */\nimport {getAllTextContent, DOCUMENT} from '../xml.js';\nimport {padNumber} from '../string.js';\n\n\n/**\n * @param {Node} node Node.\n * @return {boolean|undefined} Boolean.\n */\nexport function readBoolean(node) {\n const s = getAllTextContent(node, false);\n return readBooleanString(s);\n}\n\n\n/**\n * @param {string} string String.\n * @return {boolean|undefined} Boolean.\n */\nexport function readBooleanString(string) {\n const m = /^\\s*(true|1)|(false|0)\\s*$/.exec(string);\n if (m) {\n return m[1] !== undefined || false;\n } else {\n return undefined;\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @return {number|undefined} DateTime in seconds.\n */\nexport function readDateTime(node) {\n const s = getAllTextContent(node, false);\n const dateTime = Date.parse(s);\n return isNaN(dateTime) ? undefined : dateTime / 1000;\n}\n\n\n/**\n * @param {Node} node Node.\n * @return {number|undefined} Decimal.\n */\nexport function readDecimal(node) {\n const s = getAllTextContent(node, false);\n return readDecimalString(s);\n}\n\n\n/**\n * @param {string} string String.\n * @return {number|undefined} Decimal.\n */\nexport function readDecimalString(string) {\n // FIXME check spec\n const m = /^\\s*([+\\-]?\\d*\\.?\\d+(?:e[+\\-]?\\d+)?)\\s*$/i.exec(string);\n if (m) {\n return parseFloat(m[1]);\n } else {\n return undefined;\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @return {number|undefined} Non negative integer.\n */\nexport function readNonNegativeInteger(node) {\n const s = getAllTextContent(node, false);\n return readNonNegativeIntegerString(s);\n}\n\n\n/**\n * @param {string} string String.\n * @return {number|undefined} Non negative integer.\n */\nexport function readNonNegativeIntegerString(string) {\n const m = /^\\s*(\\d+)\\s*$/.exec(string);\n if (m) {\n return parseInt(m[1], 10);\n } else {\n return undefined;\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @return {string|undefined} String.\n */\nexport function readString(node) {\n return getAllTextContent(node, false).trim();\n}\n\n\n/**\n * @param {Node} node Node to append a TextNode with the boolean to.\n * @param {boolean} bool Boolean.\n */\nexport function writeBooleanTextNode(node, bool) {\n writeStringTextNode(node, (bool) ? '1' : '0');\n}\n\n\n/**\n * @param {Node} node Node to append a CDATA Section with the string to.\n * @param {string} string String.\n */\nexport function writeCDATASection(node, string) {\n node.appendChild(DOCUMENT.createCDATASection(string));\n}\n\n\n/**\n * @param {Node} node Node to append a TextNode with the dateTime to.\n * @param {number} dateTime DateTime in seconds.\n */\nexport function writeDateTimeTextNode(node, dateTime) {\n const date = new Date(dateTime * 1000);\n const string = date.getUTCFullYear() + '-' +\n padNumber(date.getUTCMonth() + 1, 2) + '-' +\n padNumber(date.getUTCDate(), 2) + 'T' +\n padNumber(date.getUTCHours(), 2) + ':' +\n padNumber(date.getUTCMinutes(), 2) + ':' +\n padNumber(date.getUTCSeconds(), 2) + 'Z';\n node.appendChild(DOCUMENT.createTextNode(string));\n}\n\n\n/**\n * @param {Node} node Node to append a TextNode with the decimal to.\n * @param {number} decimal Decimal.\n */\nexport function writeDecimalTextNode(node, decimal) {\n const string = decimal.toPrecision();\n node.appendChild(DOCUMENT.createTextNode(string));\n}\n\n\n/**\n * @param {Node} node Node to append a TextNode with the decimal to.\n * @param {number} nonNegativeInteger Non negative integer.\n */\nexport function writeNonNegativeIntegerTextNode(node, nonNegativeInteger) {\n const string = nonNegativeInteger.toString();\n node.appendChild(DOCUMENT.createTextNode(string));\n}\n\n\n/**\n * @param {Node} node Node to append a TextNode with the string to.\n * @param {string} string String.\n */\nexport function writeStringTextNode(node, string) {\n node.appendChild(DOCUMENT.createTextNode(string));\n}\n","/**\n * @module ol/format/GML3\n */\nimport {inherits} from '../util.js';\nimport {extend} from '../array.js';\nimport {createOrUpdate} from '../extent.js';\nimport {transformWithOptions} from '../format/Feature.js';\nimport GMLBase, {GMLNS} from '../format/GMLBase.js';\nimport {readNonNegativeIntegerString, writeStringTextNode} from '../format/xsd.js';\nimport Geometry from '../geom/Geometry.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Polygon from '../geom/Polygon.js';\nimport {assign} from '../obj.js';\nimport {get as getProjection, transformExtent} from '../proj.js';\nimport {createElementNS, getAllTextContent, makeArrayPusher, makeChildAppender,\n makeReplacer, makeSimpleNodeFactory, OBJECT_PROPERTY_NODE_FACTORY, parseNode,\n pushParseAndPop, pushSerializeAndPop, XML_SCHEMA_INSTANCE_URI} from '../xml.js';\n\n\n/**\n * @const\n * @type {string}\n * @private\n */\nconst schemaLocation = GMLNS +\n ' http://schemas.opengis.net/gml/3.1.1/profiles/gmlsfProfile/' +\n '1.0.0/gmlsf.xsd';\n\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the GML format\n * version 3.1.1.\n * Currently only supports GML 3.1.1 Simple Features profile.\n *\n * @constructor\n * @param {module:ol/format/GMLBase~Options=} opt_options\n * Optional configuration object.\n * @extends {module:ol/format/GMLBase}\n * @api\n */\nconst GML3 = function(opt_options) {\n const options = /** @type {module:ol/format/GMLBase~Options} */\n (opt_options ? opt_options : {});\n\n GMLBase.call(this, options);\n\n /**\n * @private\n * @type {boolean}\n */\n this.surface_ = options.surface !== undefined ? options.surface : false;\n\n /**\n * @private\n * @type {boolean}\n */\n this.curve_ = options.curve !== undefined ? options.curve : false;\n\n /**\n * @private\n * @type {boolean}\n */\n this.multiCurve_ = options.multiCurve !== undefined ?\n options.multiCurve : true;\n\n /**\n * @private\n * @type {boolean}\n */\n this.multiSurface_ = options.multiSurface !== undefined ?\n options.multiSurface : true;\n\n /**\n * @inheritDoc\n */\n this.schemaLocation = options.schemaLocation ?\n options.schemaLocation : schemaLocation;\n\n /**\n * @private\n * @type {boolean}\n */\n this.hasZ = options.hasZ !== undefined ?\n options.hasZ : false;\n\n};\n\ninherits(GML3, GMLBase);\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {module:ol/geom/MultiLineString|undefined} MultiLineString.\n */\nGML3.prototype.readMultiCurve_ = function(node, objectStack) {\n /** @type {Array.<module:ol/geom/LineString>} */\n const lineStrings = pushParseAndPop([],\n this.MULTICURVE_PARSERS_, node, objectStack, this);\n if (lineStrings) {\n const multiLineString = new MultiLineString(null);\n multiLineString.setLineStrings(lineStrings);\n return multiLineString;\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {module:ol/geom/MultiPolygon|undefined} MultiPolygon.\n */\nGML3.prototype.readMultiSurface_ = function(node, objectStack) {\n /** @type {Array.<module:ol/geom/Polygon>} */\n const polygons = pushParseAndPop([],\n this.MULTISURFACE_PARSERS_, node, objectStack, this);\n if (polygons) {\n const multiPolygon = new MultiPolygon(null);\n multiPolygon.setPolygons(polygons);\n return multiPolygon;\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n */\nGML3.prototype.curveMemberParser_ = function(node, objectStack) {\n parseNode(this.CURVEMEMBER_PARSERS_, node, objectStack, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n */\nGML3.prototype.surfaceMemberParser_ = function(node, objectStack) {\n parseNode(this.SURFACEMEMBER_PARSERS_,\n node, objectStack, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {Array.<(Array.<number>)>|undefined} flat coordinates.\n */\nGML3.prototype.readPatch_ = function(node, objectStack) {\n return pushParseAndPop([null],\n this.PATCHES_PARSERS_, node, objectStack, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {Array.<number>|undefined} flat coordinates.\n */\nGML3.prototype.readSegment_ = function(node, objectStack) {\n return pushParseAndPop([null],\n this.SEGMENTS_PARSERS_, node, objectStack, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {Array.<(Array.<number>)>|undefined} flat coordinates.\n */\nGML3.prototype.readPolygonPatch_ = function(node, objectStack) {\n return pushParseAndPop([null],\n this.FLAT_LINEAR_RINGS_PARSERS_, node, objectStack, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {Array.<number>|undefined} flat coordinates.\n */\nGML3.prototype.readLineStringSegment_ = function(node, objectStack) {\n return pushParseAndPop([null],\n this.GEOMETRY_FLAT_COORDINATES_PARSERS_,\n node, objectStack, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n */\nGML3.prototype.interiorParser_ = function(node, objectStack) {\n /** @type {Array.<number>|undefined} */\n const flatLinearRing = pushParseAndPop(undefined,\n this.RING_PARSERS, node, objectStack, this);\n if (flatLinearRing) {\n const flatLinearRings = /** @type {Array.<Array.<number>>} */\n (objectStack[objectStack.length - 1]);\n flatLinearRings.push(flatLinearRing);\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n */\nGML3.prototype.exteriorParser_ = function(node, objectStack) {\n /** @type {Array.<number>|undefined} */\n const flatLinearRing = pushParseAndPop(undefined,\n this.RING_PARSERS, node, objectStack, this);\n if (flatLinearRing) {\n const flatLinearRings = /** @type {Array.<Array.<number>>} */\n (objectStack[objectStack.length - 1]);\n flatLinearRings[0] = flatLinearRing;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {module:ol/geom/Polygon|undefined} Polygon.\n */\nGML3.prototype.readSurface_ = function(node, objectStack) {\n /** @type {Array.<Array.<number>>} */\n const flatLinearRings = pushParseAndPop([null],\n this.SURFACE_PARSERS_, node, objectStack, this);\n if (flatLinearRings && flatLinearRings[0]) {\n const polygon = new Polygon(null);\n const flatCoordinates = flatLinearRings[0];\n const ends = [flatCoordinates.length];\n let i, ii;\n for (i = 1, ii = flatLinearRings.length; i < ii; ++i) {\n extend(flatCoordinates, flatLinearRings[i]);\n ends.push(flatCoordinates.length);\n }\n polygon.setFlatCoordinates(\n GeometryLayout.XYZ, flatCoordinates, ends);\n return polygon;\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {module:ol/geom/LineString|undefined} LineString.\n */\nGML3.prototype.readCurve_ = function(node, objectStack) {\n /** @type {Array.<number>} */\n const flatCoordinates = pushParseAndPop([null],\n this.CURVE_PARSERS_, node, objectStack, this);\n if (flatCoordinates) {\n const lineString = new LineString(null);\n lineString.setFlatCoordinates(GeometryLayout.XYZ, flatCoordinates);\n return lineString;\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {module:ol/extent~Extent|undefined} Envelope.\n */\nGML3.prototype.readEnvelope_ = function(node, objectStack) {\n /** @type {Array.<number>} */\n const flatCoordinates = pushParseAndPop([null],\n this.ENVELOPE_PARSERS_, node, objectStack, this);\n return createOrUpdate(flatCoordinates[1][0],\n flatCoordinates[1][1], flatCoordinates[2][0],\n flatCoordinates[2][1]);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {Array.<number>|undefined} Flat coordinates.\n */\nGML3.prototype.readFlatPos_ = function(node, objectStack) {\n let s = getAllTextContent(node, false);\n const re = /^\\s*([+\\-]?\\d*\\.?\\d+(?:[eE][+\\-]?\\d+)?)\\s*/;\n /** @type {Array.<number>} */\n const flatCoordinates = [];\n let m;\n while ((m = re.exec(s))) {\n flatCoordinates.push(parseFloat(m[1]));\n s = s.substr(m[0].length);\n }\n if (s !== '') {\n return undefined;\n }\n const context = objectStack[0];\n const containerSrs = context['srsName'];\n let axisOrientation = 'enu';\n if (containerSrs) {\n const proj = getProjection(containerSrs);\n axisOrientation = proj.getAxisOrientation();\n }\n if (axisOrientation === 'neu') {\n let i, ii;\n for (i = 0, ii = flatCoordinates.length; i < ii; i += 3) {\n const y = flatCoordinates[i];\n const x = flatCoordinates[i + 1];\n flatCoordinates[i] = x;\n flatCoordinates[i + 1] = y;\n }\n }\n const len = flatCoordinates.length;\n if (len == 2) {\n flatCoordinates.push(0);\n }\n if (len === 0) {\n return undefined;\n }\n return flatCoordinates;\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {Array.<number>|undefined} Flat coordinates.\n */\nGML3.prototype.readFlatPosList_ = function(node, objectStack) {\n const s = getAllTextContent(node, false).replace(/^\\s*|\\s*$/g, '');\n const context = objectStack[0];\n const containerSrs = context['srsName'];\n const contextDimension = context['srsDimension'];\n let axisOrientation = 'enu';\n if (containerSrs) {\n const proj = getProjection(containerSrs);\n axisOrientation = proj.getAxisOrientation();\n }\n const coords = s.split(/\\s+/);\n // The \"dimension\" attribute is from the GML 3.0.1 spec.\n let dim = 2;\n if (node.getAttribute('srsDimension')) {\n dim = readNonNegativeIntegerString(\n node.getAttribute('srsDimension'));\n } else if (node.getAttribute('dimension')) {\n dim = readNonNegativeIntegerString(\n node.getAttribute('dimension'));\n } else if (node.parentNode.getAttribute('srsDimension')) {\n dim = readNonNegativeIntegerString(\n node.parentNode.getAttribute('srsDimension'));\n } else if (contextDimension) {\n dim = readNonNegativeIntegerString(contextDimension);\n }\n let x, y, z;\n const flatCoordinates = [];\n for (let i = 0, ii = coords.length; i < ii; i += dim) {\n x = parseFloat(coords[i]);\n y = parseFloat(coords[i + 1]);\n z = (dim === 3) ? parseFloat(coords[i + 2]) : 0;\n if (axisOrientation.substr(0, 2) === 'en') {\n flatCoordinates.push(x, y, z);\n } else {\n flatCoordinates.push(y, x, z);\n }\n }\n return flatCoordinates;\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML3.prototype.GEOMETRY_FLAT_COORDINATES_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'pos': makeReplacer(GML3.prototype.readFlatPos_),\n 'posList': makeReplacer(GML3.prototype.readFlatPosList_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML3.prototype.FLAT_LINEAR_RINGS_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'interior': GML3.prototype.interiorParser_,\n 'exterior': GML3.prototype.exteriorParser_\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML3.prototype.GEOMETRY_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'Point': makeReplacer(GMLBase.prototype.readPoint),\n 'MultiPoint': makeReplacer(\n GMLBase.prototype.readMultiPoint),\n 'LineString': makeReplacer(\n GMLBase.prototype.readLineString),\n 'MultiLineString': makeReplacer(\n GMLBase.prototype.readMultiLineString),\n 'LinearRing': makeReplacer(\n GMLBase.prototype.readLinearRing),\n 'Polygon': makeReplacer(GMLBase.prototype.readPolygon),\n 'MultiPolygon': makeReplacer(\n GMLBase.prototype.readMultiPolygon),\n 'Surface': makeReplacer(GML3.prototype.readSurface_),\n 'MultiSurface': makeReplacer(\n GML3.prototype.readMultiSurface_),\n 'Curve': makeReplacer(GML3.prototype.readCurve_),\n 'MultiCurve': makeReplacer(\n GML3.prototype.readMultiCurve_),\n 'Envelope': makeReplacer(GML3.prototype.readEnvelope_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML3.prototype.MULTICURVE_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'curveMember': makeArrayPusher(\n GML3.prototype.curveMemberParser_),\n 'curveMembers': makeArrayPusher(\n GML3.prototype.curveMemberParser_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML3.prototype.MULTISURFACE_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'surfaceMember': makeArrayPusher(\n GML3.prototype.surfaceMemberParser_),\n 'surfaceMembers': makeArrayPusher(\n GML3.prototype.surfaceMemberParser_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML3.prototype.CURVEMEMBER_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'LineString': makeArrayPusher(\n GMLBase.prototype.readLineString),\n 'Curve': makeArrayPusher(GML3.prototype.readCurve_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML3.prototype.SURFACEMEMBER_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'Polygon': makeArrayPusher(GMLBase.prototype.readPolygon),\n 'Surface': makeArrayPusher(GML3.prototype.readSurface_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML3.prototype.SURFACE_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'patches': makeReplacer(GML3.prototype.readPatch_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML3.prototype.CURVE_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'segments': makeReplacer(GML3.prototype.readSegment_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML3.prototype.ENVELOPE_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'lowerCorner': makeArrayPusher(\n GML3.prototype.readFlatPosList_),\n 'upperCorner': makeArrayPusher(\n GML3.prototype.readFlatPosList_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML3.prototype.PATCHES_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'PolygonPatch': makeReplacer(\n GML3.prototype.readPolygonPatch_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML3.prototype.SEGMENTS_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'LineStringSegment': makeReplacer(\n GML3.prototype.readLineStringSegment_)\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Point} value Point geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writePos_ = function(node, value, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const hasZ = context['hasZ'];\n const srsDimension = hasZ ? 3 : 2;\n node.setAttribute('srsDimension', srsDimension);\n const srsName = context['srsName'];\n let axisOrientation = 'enu';\n if (srsName) {\n axisOrientation = getProjection(srsName).getAxisOrientation();\n }\n const point = value.getCoordinates();\n let coords;\n // only 2d for simple features profile\n if (axisOrientation.substr(0, 2) === 'en') {\n coords = (point[0] + ' ' + point[1]);\n } else {\n coords = (point[1] + ' ' + point[0]);\n }\n if (hasZ) {\n // For newly created points, Z can be undefined.\n const z = point[2] || 0;\n coords += ' ' + z;\n }\n writeStringTextNode(node, coords);\n};\n\n\n/**\n * @param {Array.<number>} point Point geometry.\n * @param {string=} opt_srsName Optional srsName\n * @param {boolean=} opt_hasZ whether the geometry has a Z coordinate (is 3D) or not.\n * @return {string} The coords string.\n * @private\n */\nGML3.prototype.getCoords_ = function(point, opt_srsName, opt_hasZ) {\n let axisOrientation = 'enu';\n if (opt_srsName) {\n axisOrientation = getProjection(opt_srsName).getAxisOrientation();\n }\n let coords = ((axisOrientation.substr(0, 2) === 'en') ?\n point[0] + ' ' + point[1] :\n point[1] + ' ' + point[0]);\n if (opt_hasZ) {\n // For newly created points, Z can be undefined.\n const z = point[2] || 0;\n coords += ' ' + z;\n }\n\n return coords;\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LineString|module:ol/geom/LinearRing} value Geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writePosList_ = function(node, value, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const hasZ = context['hasZ'];\n const srsDimension = hasZ ? 3 : 2;\n node.setAttribute('srsDimension', srsDimension);\n const srsName = context['srsName'];\n // only 2d for simple features profile\n const points = value.getCoordinates();\n const len = points.length;\n const parts = new Array(len);\n let point;\n for (let i = 0; i < len; ++i) {\n point = points[i];\n parts[i] = this.getCoords_(point, srsName, hasZ);\n }\n writeStringTextNode(node, parts.join(' '));\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Point} geometry Point geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writePoint_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const srsName = context['srsName'];\n if (srsName) {\n node.setAttribute('srsName', srsName);\n }\n const pos = createElementNS(node.namespaceURI, 'pos');\n node.appendChild(pos);\n this.writePos_(pos, geometry, objectStack);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {Array.<*>} objectStack Node stack.\n */\nGML3.prototype.writeEnvelope = function(node, extent, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const srsName = context['srsName'];\n if (srsName) {\n node.setAttribute('srsName', srsName);\n }\n const keys = ['lowerCorner', 'upperCorner'];\n const values = [extent[0] + ' ' + extent[1], extent[2] + ' ' + extent[3]];\n pushSerializeAndPop(/** @type {module:ol/xml~NodeStackItem} */\n ({node: node}), this.ENVELOPE_SERIALIZERS_,\n OBJECT_PROPERTY_NODE_FACTORY,\n values,\n objectStack, keys, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LinearRing} geometry LinearRing geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writeLinearRing_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const srsName = context['srsName'];\n if (srsName) {\n node.setAttribute('srsName', srsName);\n }\n const posList = createElementNS(node.namespaceURI, 'posList');\n node.appendChild(posList);\n this.writePosList_(posList, geometry, objectStack);\n};\n\n\n/**\n * @param {*} value Value.\n * @param {Array.<*>} objectStack Object stack.\n * @param {string=} opt_nodeName Node name.\n * @return {Node} Node.\n * @private\n */\nGML3.prototype.RING_NODE_FACTORY_ = function(value, objectStack, opt_nodeName) {\n const context = objectStack[objectStack.length - 1];\n const parentNode = context.node;\n const exteriorWritten = context['exteriorWritten'];\n if (exteriorWritten === undefined) {\n context['exteriorWritten'] = true;\n }\n return createElementNS(parentNode.namespaceURI,\n exteriorWritten !== undefined ? 'interior' : 'exterior');\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Polygon} geometry Polygon geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writeSurfaceOrPolygon_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const hasZ = context['hasZ'];\n const srsName = context['srsName'];\n if (node.nodeName !== 'PolygonPatch' && srsName) {\n node.setAttribute('srsName', srsName);\n }\n if (node.nodeName === 'Polygon' || node.nodeName === 'PolygonPatch') {\n const rings = geometry.getLinearRings();\n pushSerializeAndPop(\n {node: node, hasZ: hasZ, srsName: srsName},\n this.RING_SERIALIZERS_,\n this.RING_NODE_FACTORY_,\n rings, objectStack, undefined, this);\n } else if (node.nodeName === 'Surface') {\n const patches = createElementNS(node.namespaceURI, 'patches');\n node.appendChild(patches);\n this.writeSurfacePatches_(\n patches, geometry, objectStack);\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LineString} geometry LineString geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writeCurveOrLineString_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const srsName = context['srsName'];\n if (node.nodeName !== 'LineStringSegment' && srsName) {\n node.setAttribute('srsName', srsName);\n }\n if (node.nodeName === 'LineString' ||\n node.nodeName === 'LineStringSegment') {\n const posList = createElementNS(node.namespaceURI, 'posList');\n node.appendChild(posList);\n this.writePosList_(posList, geometry, objectStack);\n } else if (node.nodeName === 'Curve') {\n const segments = createElementNS(node.namespaceURI, 'segments');\n node.appendChild(segments);\n this.writeCurveSegments_(segments,\n geometry, objectStack);\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/MultiPolygon} geometry MultiPolygon geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writeMultiSurfaceOrPolygon_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const hasZ = context['hasZ'];\n const srsName = context['srsName'];\n const surface = context['surface'];\n if (srsName) {\n node.setAttribute('srsName', srsName);\n }\n const polygons = geometry.getPolygons();\n pushSerializeAndPop({node: node, hasZ: hasZ, srsName: srsName, surface: surface},\n this.SURFACEORPOLYGONMEMBER_SERIALIZERS_,\n this.MULTIGEOMETRY_MEMBER_NODE_FACTORY_, polygons,\n objectStack, undefined, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/MultiPoint} geometry MultiPoint geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writeMultiPoint_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const srsName = context['srsName'];\n const hasZ = context['hasZ'];\n if (srsName) {\n node.setAttribute('srsName', srsName);\n }\n const points = geometry.getPoints();\n pushSerializeAndPop({node: node, hasZ: hasZ, srsName: srsName},\n this.POINTMEMBER_SERIALIZERS_,\n makeSimpleNodeFactory('pointMember'), points,\n objectStack, undefined, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/MultiLineString} geometry MultiLineString geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writeMultiCurveOrLineString_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const hasZ = context['hasZ'];\n const srsName = context['srsName'];\n const curve = context['curve'];\n if (srsName) {\n node.setAttribute('srsName', srsName);\n }\n const lines = geometry.getLineStrings();\n pushSerializeAndPop({node: node, hasZ: hasZ, srsName: srsName, curve: curve},\n this.LINESTRINGORCURVEMEMBER_SERIALIZERS_,\n this.MULTIGEOMETRY_MEMBER_NODE_FACTORY_, lines,\n objectStack, undefined, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LinearRing} ring LinearRing geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writeRing_ = function(node, ring, objectStack) {\n const linearRing = createElementNS(node.namespaceURI, 'LinearRing');\n node.appendChild(linearRing);\n this.writeLinearRing_(linearRing, ring, objectStack);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Polygon} polygon Polygon geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writeSurfaceOrPolygonMember_ = function(node, polygon, objectStack) {\n const child = this.GEOMETRY_NODE_FACTORY_(\n polygon, objectStack);\n if (child) {\n node.appendChild(child);\n this.writeSurfaceOrPolygon_(child, polygon, objectStack);\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Point} point Point geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writePointMember_ = function(node, point, objectStack) {\n const child = createElementNS(node.namespaceURI, 'Point');\n node.appendChild(child);\n this.writePoint_(child, point, objectStack);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LineString} line LineString geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writeLineStringOrCurveMember_ = function(node, line, objectStack) {\n const child = this.GEOMETRY_NODE_FACTORY_(line, objectStack);\n if (child) {\n node.appendChild(child);\n this.writeCurveOrLineString_(child, line, objectStack);\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Polygon} polygon Polygon geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writeSurfacePatches_ = function(node, polygon, objectStack) {\n const child = createElementNS(node.namespaceURI, 'PolygonPatch');\n node.appendChild(child);\n this.writeSurfaceOrPolygon_(child, polygon, objectStack);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LineString} line LineString geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writeCurveSegments_ = function(node, line, objectStack) {\n const child = createElementNS(node.namespaceURI,\n 'LineStringSegment');\n node.appendChild(child);\n this.writeCurveOrLineString_(child, line, objectStack);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Geometry|module:ol/extent~Extent} geometry Geometry.\n * @param {Array.<*>} objectStack Node stack.\n */\nGML3.prototype.writeGeometryElement = function(node, geometry, objectStack) {\n const context = /** @type {module:ol/format/Feature~WriteOptions} */ (objectStack[objectStack.length - 1]);\n const item = assign({}, context);\n item.node = node;\n let value;\n if (Array.isArray(geometry)) {\n if (context.dataProjection) {\n value = transformExtent(\n geometry, context.featureProjection, context.dataProjection);\n } else {\n value = geometry;\n }\n } else {\n value = transformWithOptions(/** @type {module:ol/geom/Geometry} */ (geometry), true, context);\n }\n pushSerializeAndPop(/** @type {module:ol/xml~NodeStackItem} */\n (item), this.GEOMETRY_SERIALIZERS_,\n this.GEOMETRY_NODE_FACTORY_, [value],\n objectStack, undefined, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/Feature} feature Feature.\n * @param {Array.<*>} objectStack Node stack.\n */\nGML3.prototype.writeFeatureElement = function(node, feature, objectStack) {\n const fid = feature.getId();\n if (fid) {\n node.setAttribute('fid', fid);\n }\n const context = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n const featureNS = context['featureNS'];\n const geometryName = feature.getGeometryName();\n if (!context.serializers) {\n context.serializers = {};\n context.serializers[featureNS] = {};\n }\n const properties = feature.getProperties();\n const keys = [];\n const values = [];\n for (const key in properties) {\n const value = properties[key];\n if (value !== null) {\n keys.push(key);\n values.push(value);\n if (key == geometryName || value instanceof Geometry) {\n if (!(key in context.serializers[featureNS])) {\n context.serializers[featureNS][key] = makeChildAppender(\n this.writeGeometryElement, this);\n }\n } else {\n if (!(key in context.serializers[featureNS])) {\n context.serializers[featureNS][key] = makeChildAppender(writeStringTextNode);\n }\n }\n }\n }\n const item = assign({}, context);\n item.node = node;\n pushSerializeAndPop(/** @type {module:ol/xml~NodeStackItem} */\n (item), context.serializers,\n makeSimpleNodeFactory(undefined, featureNS),\n values,\n objectStack, keys);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML3.prototype.writeFeatureMembers_ = function(node, features, objectStack) {\n const context = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n const featureType = context['featureType'];\n const featureNS = context['featureNS'];\n const serializers = {};\n serializers[featureNS] = {};\n serializers[featureNS][featureType] = makeChildAppender(\n this.writeFeatureElement, this);\n const item = assign({}, context);\n item.node = node;\n pushSerializeAndPop(/** @type {module:ol/xml~NodeStackItem} */\n (item),\n serializers,\n makeSimpleNodeFactory(featureType, featureNS), features,\n objectStack);\n};\n\n\n/**\n * @const\n * @type {Object.<string, string>}\n */\nconst MULTIGEOMETRY_TO_MEMBER_NODENAME = {\n 'MultiLineString': 'lineStringMember',\n 'MultiCurve': 'curveMember',\n 'MultiPolygon': 'polygonMember',\n 'MultiSurface': 'surfaceMember'\n};\n\n\n/**\n * @const\n * @param {*} value Value.\n * @param {Array.<*>} objectStack Object stack.\n * @param {string=} opt_nodeName Node name.\n * @return {Node|undefined} Node.\n * @private\n */\nGML3.prototype.MULTIGEOMETRY_MEMBER_NODE_FACTORY_ = function(value, objectStack, opt_nodeName) {\n const parentNode = objectStack[objectStack.length - 1].node;\n return createElementNS('http://www.opengis.net/gml',\n MULTIGEOMETRY_TO_MEMBER_NODENAME[parentNode.nodeName]);\n};\n\n\n/**\n * @const\n * @param {*} value Value.\n * @param {Array.<*>} objectStack Object stack.\n * @param {string=} opt_nodeName Node name.\n * @return {Node|undefined} Node.\n * @private\n */\nGML3.prototype.GEOMETRY_NODE_FACTORY_ = function(value, objectStack, opt_nodeName) {\n const context = objectStack[objectStack.length - 1];\n const multiSurface = context['multiSurface'];\n const surface = context['surface'];\n const curve = context['curve'];\n const multiCurve = context['multiCurve'];\n let nodeName;\n if (!Array.isArray(value)) {\n nodeName = /** @type {module:ol/geom/Geometry} */ (value).getType();\n if (nodeName === 'MultiPolygon' && multiSurface === true) {\n nodeName = 'MultiSurface';\n } else if (nodeName === 'Polygon' && surface === true) {\n nodeName = 'Surface';\n } else if (nodeName === 'LineString' && curve === true) {\n nodeName = 'Curve';\n } else if (nodeName === 'MultiLineString' && multiCurve === true) {\n nodeName = 'MultiCurve';\n }\n } else {\n nodeName = 'Envelope';\n }\n return createElementNS('http://www.opengis.net/gml',\n nodeName);\n};\n\n\n/**\n * Encode a geometry in GML 3.1.1 Simple Features.\n *\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Options.\n * @return {Node} Node.\n * @override\n * @api\n */\nGML3.prototype.writeGeometryNode = function(geometry, opt_options) {\n opt_options = this.adaptOptions(opt_options);\n const geom = createElementNS('http://www.opengis.net/gml', 'geom');\n const context = {node: geom, hasZ: this.hasZ, srsName: this.srsName,\n curve: this.curve_, surface: this.surface_,\n multiSurface: this.multiSurface_, multiCurve: this.multiCurve_};\n if (opt_options) {\n assign(context, opt_options);\n }\n this.writeGeometryElement(geom, geometry, [context]);\n return geom;\n};\n\n\n/**\n * Encode an array of features in GML 3.1.1 Simple Features.\n *\n * @function\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Options.\n * @return {string} Result.\n * @api\n */\nGML3.prototype.writeFeatures;\n\n\n/**\n * Encode an array of features in the GML 3.1.1 format as an XML node.\n *\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Options.\n * @return {Node} Node.\n * @override\n * @api\n */\nGML3.prototype.writeFeaturesNode = function(features, opt_options) {\n opt_options = this.adaptOptions(opt_options);\n const node = createElementNS('http://www.opengis.net/gml', 'featureMembers');\n node.setAttributeNS(XML_SCHEMA_INSTANCE_URI, 'xsi:schemaLocation', this.schemaLocation);\n const context = {\n srsName: this.srsName,\n hasZ: this.hasZ,\n curve: this.curve_,\n surface: this.surface_,\n multiSurface: this.multiSurface_,\n multiCurve: this.multiCurve_,\n featureNS: this.featureNS,\n featureType: this.featureType\n };\n if (opt_options) {\n assign(context, opt_options);\n }\n this.writeFeatureMembers_(node, features, [context]);\n return node;\n};\n\n\n/**\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n * @private\n */\nGML3.prototype.RING_SERIALIZERS_ = {\n 'http://www.opengis.net/gml': {\n 'exterior': makeChildAppender(GML3.prototype.writeRing_),\n 'interior': makeChildAppender(GML3.prototype.writeRing_)\n }\n};\n\n\n/**\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n * @private\n */\nGML3.prototype.ENVELOPE_SERIALIZERS_ = {\n 'http://www.opengis.net/gml': {\n 'lowerCorner': makeChildAppender(writeStringTextNode),\n 'upperCorner': makeChildAppender(writeStringTextNode)\n }\n};\n\n\n/**\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n * @private\n */\nGML3.prototype.SURFACEORPOLYGONMEMBER_SERIALIZERS_ = {\n 'http://www.opengis.net/gml': {\n 'surfaceMember': makeChildAppender(\n GML3.prototype.writeSurfaceOrPolygonMember_),\n 'polygonMember': makeChildAppender(\n GML3.prototype.writeSurfaceOrPolygonMember_)\n }\n};\n\n\n/**\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n * @private\n */\nGML3.prototype.POINTMEMBER_SERIALIZERS_ = {\n 'http://www.opengis.net/gml': {\n 'pointMember': makeChildAppender(\n GML3.prototype.writePointMember_)\n }\n};\n\n\n/**\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n * @private\n */\nGML3.prototype.LINESTRINGORCURVEMEMBER_SERIALIZERS_ = {\n 'http://www.opengis.net/gml': {\n 'lineStringMember': makeChildAppender(\n GML3.prototype.writeLineStringOrCurveMember_),\n 'curveMember': makeChildAppender(\n GML3.prototype.writeLineStringOrCurveMember_)\n }\n};\n\n\n/**\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n * @private\n */\nGML3.prototype.GEOMETRY_SERIALIZERS_ = {\n 'http://www.opengis.net/gml': {\n 'Curve': makeChildAppender(\n GML3.prototype.writeCurveOrLineString_),\n 'MultiCurve': makeChildAppender(\n GML3.prototype.writeMultiCurveOrLineString_),\n 'Point': makeChildAppender(GML3.prototype.writePoint_),\n 'MultiPoint': makeChildAppender(\n GML3.prototype.writeMultiPoint_),\n 'LineString': makeChildAppender(\n GML3.prototype.writeCurveOrLineString_),\n 'MultiLineString': makeChildAppender(\n GML3.prototype.writeMultiCurveOrLineString_),\n 'LinearRing': makeChildAppender(\n GML3.prototype.writeLinearRing_),\n 'Polygon': makeChildAppender(\n GML3.prototype.writeSurfaceOrPolygon_),\n 'MultiPolygon': makeChildAppender(\n GML3.prototype.writeMultiSurfaceOrPolygon_),\n 'Surface': makeChildAppender(\n GML3.prototype.writeSurfaceOrPolygon_),\n 'MultiSurface': makeChildAppender(\n GML3.prototype.writeMultiSurfaceOrPolygon_),\n 'Envelope': makeChildAppender(\n GML3.prototype.writeEnvelope)\n }\n};\n\n\nexport default GML3;\n","/**\n * @module ol/format/GML\n */\nimport GML3 from '../format/GML3.js';\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the GML format\n * version 3.1.1.\n * Currently only supports GML 3.1.1 Simple Features profile.\n *\n * @constructor\n * @param {module:ol/format/GMLBase~Options=} opt_options\n * Optional configuration object.\n * @extends {module:ol/format/GMLBase}\n * @api\n */\nconst GML = GML3;\n\n\n/**\n * Encode an array of features in GML 3.1.1 Simple Features.\n *\n * @function\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Options.\n * @return {string} Result.\n * @api\n */\nGML.prototype.writeFeatures;\n\n\n/**\n * Encode an array of features in the GML 3.1.1 format as an XML node.\n *\n * @function\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Options.\n * @return {Node} Node.\n * @api\n */\nGML.prototype.writeFeaturesNode;\n\nexport default GML;\n","/**\n * @module ol/format/GML2\n */\nimport {inherits} from '../util.js';\nimport {createOrUpdate} from '../extent.js';\nimport {transformWithOptions} from '../format/Feature.js';\nimport GMLBase, {GMLNS} from '../format/GMLBase.js';\nimport {writeStringTextNode} from '../format/xsd.js';\nimport Geometry from '../geom/Geometry.js';\nimport {assign} from '../obj.js';\nimport {get as getProjection, transformExtent} from '../proj.js';\nimport {createElementNS, getAllTextContent, makeArrayPusher, makeChildAppender,\n makeReplacer, makeSimpleNodeFactory, OBJECT_PROPERTY_NODE_FACTORY, pushParseAndPop, pushSerializeAndPop} from '../xml.js';\n\n\n/**\n * @const\n * @type {string}\n */\nconst schemaLocation = GMLNS + ' http://schemas.opengis.net/gml/2.1.2/feature.xsd';\n\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the GML format,\n * version 2.1.2.\n *\n * @constructor\n * @param {module:ol/format/GMLBase~Options=} opt_options Optional configuration object.\n * @extends {module:ol/format/GMLBase}\n * @api\n */\nconst GML2 = function(opt_options) {\n const options = /** @type {module:ol/format/GMLBase~Options} */\n (opt_options ? opt_options : {});\n\n GMLBase.call(this, options);\n\n this.FEATURE_COLLECTION_PARSERS[GMLNS][\n 'featureMember'] =\n makeArrayPusher(GMLBase.prototype.readFeaturesInternal);\n\n /**\n * @inheritDoc\n */\n this.schemaLocation = options.schemaLocation ?\n options.schemaLocation : schemaLocation;\n\n};\n\ninherits(GML2, GMLBase);\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {Array.<number>|undefined} Flat coordinates.\n */\nGML2.prototype.readFlatCoordinates_ = function(node, objectStack) {\n const s = getAllTextContent(node, false).replace(/^\\s*|\\s*$/g, '');\n const context = /** @type {module:ol/xml~NodeStackItem} */ (objectStack[0]);\n const containerSrs = context['srsName'];\n let axisOrientation = 'enu';\n if (containerSrs) {\n const proj = getProjection(containerSrs);\n if (proj) {\n axisOrientation = proj.getAxisOrientation();\n }\n }\n const coordsGroups = s.trim().split(/\\s+/);\n const flatCoordinates = [];\n for (let i = 0, ii = coordsGroups.length; i < ii; i++) {\n const coords = coordsGroups[i].split(/,+/);\n const x = parseFloat(coords[0]);\n const y = parseFloat(coords[1]);\n const z = (coords.length === 3) ? parseFloat(coords[2]) : 0;\n if (axisOrientation.substr(0, 2) === 'en') {\n flatCoordinates.push(x, y, z);\n } else {\n flatCoordinates.push(y, x, z);\n }\n }\n return flatCoordinates;\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {module:ol/extent~Extent|undefined} Envelope.\n */\nGML2.prototype.readBox_ = function(node, objectStack) {\n /** @type {Array.<number>} */\n const flatCoordinates = pushParseAndPop([null],\n this.BOX_PARSERS_, node, objectStack, this);\n return createOrUpdate(flatCoordinates[1][0],\n flatCoordinates[1][1], flatCoordinates[1][3],\n flatCoordinates[1][4]);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n */\nGML2.prototype.innerBoundaryIsParser_ = function(node, objectStack) {\n /** @type {Array.<number>|undefined} */\n const flatLinearRing = pushParseAndPop(undefined,\n this.RING_PARSERS, node, objectStack, this);\n if (flatLinearRing) {\n const flatLinearRings = /** @type {Array.<Array.<number>>} */\n (objectStack[objectStack.length - 1]);\n flatLinearRings.push(flatLinearRing);\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n */\nGML2.prototype.outerBoundaryIsParser_ = function(node, objectStack) {\n /** @type {Array.<number>|undefined} */\n const flatLinearRing = pushParseAndPop(undefined,\n this.RING_PARSERS, node, objectStack, this);\n if (flatLinearRing) {\n const flatLinearRings = /** @type {Array.<Array.<number>>} */\n (objectStack[objectStack.length - 1]);\n flatLinearRings[0] = flatLinearRing;\n }\n};\n\n\n/**\n * @const\n * @param {*} value Value.\n * @param {Array.<*>} objectStack Object stack.\n * @param {string=} opt_nodeName Node name.\n * @return {Node|undefined} Node.\n * @private\n */\nGML2.prototype.GEOMETRY_NODE_FACTORY_ = function(value, objectStack, opt_nodeName) {\n const context = objectStack[objectStack.length - 1];\n const multiSurface = context['multiSurface'];\n const surface = context['surface'];\n const multiCurve = context['multiCurve'];\n let nodeName;\n if (!Array.isArray(value)) {\n nodeName = /** @type {module:ol/geom/Geometry} */ (value).getType();\n if (nodeName === 'MultiPolygon' && multiSurface === true) {\n nodeName = 'MultiSurface';\n } else if (nodeName === 'Polygon' && surface === true) {\n nodeName = 'Surface';\n } else if (nodeName === 'MultiLineString' && multiCurve === true) {\n nodeName = 'MultiCurve';\n }\n } else {\n nodeName = 'Envelope';\n }\n return createElementNS('http://www.opengis.net/gml',\n nodeName);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/Feature} feature Feature.\n * @param {Array.<*>} objectStack Node stack.\n */\nGML2.prototype.writeFeatureElement = function(node, feature, objectStack) {\n const fid = feature.getId();\n if (fid) {\n node.setAttribute('fid', fid);\n }\n const context = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n const featureNS = context['featureNS'];\n const geometryName = feature.getGeometryName();\n if (!context.serializers) {\n context.serializers = {};\n context.serializers[featureNS] = {};\n }\n const properties = feature.getProperties();\n const keys = [];\n const values = [];\n for (const key in properties) {\n const value = properties[key];\n if (value !== null) {\n keys.push(key);\n values.push(value);\n if (key == geometryName || value instanceof Geometry) {\n if (!(key in context.serializers[featureNS])) {\n context.serializers[featureNS][key] = makeChildAppender(\n this.writeGeometryElement, this);\n }\n } else {\n if (!(key in context.serializers[featureNS])) {\n context.serializers[featureNS][key] = makeChildAppender(writeStringTextNode);\n }\n }\n }\n }\n const item = assign({}, context);\n item.node = node;\n pushSerializeAndPop(/** @type {module:ol/xml~NodeStackItem} */\n (item), context.serializers,\n makeSimpleNodeFactory(undefined, featureNS),\n values,\n objectStack, keys);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LineString} geometry LineString geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writeCurveOrLineString_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const srsName = context['srsName'];\n if (node.nodeName !== 'LineStringSegment' && srsName) {\n node.setAttribute('srsName', srsName);\n }\n if (node.nodeName === 'LineString' ||\n node.nodeName === 'LineStringSegment') {\n const coordinates = this.createCoordinatesNode_(node.namespaceURI);\n node.appendChild(coordinates);\n this.writeCoordinates_(coordinates, geometry, objectStack);\n } else if (node.nodeName === 'Curve') {\n const segments = createElementNS(node.namespaceURI, 'segments');\n node.appendChild(segments);\n this.writeCurveSegments_(segments,\n geometry, objectStack);\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LineString} line LineString geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writeLineStringOrCurveMember_ = function(node, line, objectStack) {\n const child = this.GEOMETRY_NODE_FACTORY_(line, objectStack);\n if (child) {\n node.appendChild(child);\n this.writeCurveOrLineString_(child, line, objectStack);\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/MultiLineString} geometry MultiLineString geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writeMultiCurveOrLineString_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const hasZ = context['hasZ'];\n const srsName = context['srsName'];\n const curve = context['curve'];\n if (srsName) {\n node.setAttribute('srsName', srsName);\n }\n const lines = geometry.getLineStrings();\n pushSerializeAndPop({node: node, hasZ: hasZ, srsName: srsName, curve: curve},\n this.LINESTRINGORCURVEMEMBER_SERIALIZERS_,\n this.MULTIGEOMETRY_MEMBER_NODE_FACTORY_, lines,\n objectStack, undefined, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Geometry|module:ol/extent~Extent} geometry Geometry.\n * @param {Array.<*>} objectStack Node stack.\n */\nGML2.prototype.writeGeometryElement = function(node, geometry, objectStack) {\n const context = /** @type {module:ol/format/Feature~WriteOptions} */ (objectStack[objectStack.length - 1]);\n const item = assign({}, context);\n item.node = node;\n let value;\n if (Array.isArray(geometry)) {\n if (context.dataProjection) {\n value = transformExtent(\n geometry, context.featureProjection, context.dataProjection);\n } else {\n value = geometry;\n }\n } else {\n value = transformWithOptions(/** @type {module:ol/geom/Geometry} */ (geometry), true, context);\n }\n pushSerializeAndPop(/** @type {module:ol/xml~NodeStackItem} */\n (item), this.GEOMETRY_SERIALIZERS_,\n this.GEOMETRY_NODE_FACTORY_, [value],\n objectStack, undefined, this);\n};\n\n\n/**\n * @param {string} namespaceURI XML namespace.\n * @returns {Node} coordinates node.\n * @private\n */\nGML2.prototype.createCoordinatesNode_ = function(namespaceURI) {\n const coordinates = createElementNS(namespaceURI, 'coordinates');\n coordinates.setAttribute('decimal', '.');\n coordinates.setAttribute('cs', ',');\n coordinates.setAttribute('ts', ' ');\n\n return coordinates;\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LineString|module:ol/geom/LinearRing} value Geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writeCoordinates_ = function(node, value, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const hasZ = context['hasZ'];\n const srsName = context['srsName'];\n // only 2d for simple features profile\n const points = value.getCoordinates();\n const len = points.length;\n const parts = new Array(len);\n for (let i = 0; i < len; ++i) {\n const point = points[i];\n parts[i] = this.getCoords_(point, srsName, hasZ);\n }\n writeStringTextNode(node, parts.join(' '));\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LineString} line LineString geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writeCurveSegments_ = function(node, line, objectStack) {\n const child = createElementNS(node.namespaceURI, 'LineStringSegment');\n node.appendChild(child);\n this.writeCurveOrLineString_(child, line, objectStack);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Polygon} geometry Polygon geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writeSurfaceOrPolygon_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const hasZ = context['hasZ'];\n const srsName = context['srsName'];\n if (node.nodeName !== 'PolygonPatch' && srsName) {\n node.setAttribute('srsName', srsName);\n }\n if (node.nodeName === 'Polygon' || node.nodeName === 'PolygonPatch') {\n const rings = geometry.getLinearRings();\n pushSerializeAndPop(\n {node: node, hasZ: hasZ, srsName: srsName},\n this.RING_SERIALIZERS_,\n this.RING_NODE_FACTORY_,\n rings, objectStack, undefined, this);\n } else if (node.nodeName === 'Surface') {\n const patches = createElementNS(node.namespaceURI, 'patches');\n node.appendChild(patches);\n this.writeSurfacePatches_(\n patches, geometry, objectStack);\n }\n};\n\n\n/**\n * @param {*} value Value.\n * @param {Array.<*>} objectStack Object stack.\n * @param {string=} opt_nodeName Node name.\n * @return {Node} Node.\n * @private\n */\nGML2.prototype.RING_NODE_FACTORY_ = function(value, objectStack, opt_nodeName) {\n const context = objectStack[objectStack.length - 1];\n const parentNode = context.node;\n const exteriorWritten = context['exteriorWritten'];\n if (exteriorWritten === undefined) {\n context['exteriorWritten'] = true;\n }\n return createElementNS(parentNode.namespaceURI,\n exteriorWritten !== undefined ? 'innerBoundaryIs' : 'outerBoundaryIs');\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Polygon} polygon Polygon geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writeSurfacePatches_ = function(node, polygon, objectStack) {\n const child = createElementNS(node.namespaceURI, 'PolygonPatch');\n node.appendChild(child);\n this.writeSurfaceOrPolygon_(child, polygon, objectStack);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LinearRing} ring LinearRing geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writeRing_ = function(node, ring, objectStack) {\n const linearRing = createElementNS(node.namespaceURI, 'LinearRing');\n node.appendChild(linearRing);\n this.writeLinearRing_(linearRing, ring, objectStack);\n};\n\n\n/**\n * @param {Array.<number>} point Point geometry.\n * @param {string=} opt_srsName Optional srsName\n * @param {boolean=} opt_hasZ whether the geometry has a Z coordinate (is 3D) or not.\n * @return {string} The coords string.\n * @private\n */\nGML2.prototype.getCoords_ = function(point, opt_srsName, opt_hasZ) {\n let axisOrientation = 'enu';\n if (opt_srsName) {\n axisOrientation = getProjection(opt_srsName).getAxisOrientation();\n }\n let coords = ((axisOrientation.substr(0, 2) === 'en') ?\n point[0] + ',' + point[1] :\n point[1] + ',' + point[0]);\n if (opt_hasZ) {\n // For newly created points, Z can be undefined.\n const z = point[2] || 0;\n coords += ',' + z;\n }\n\n return coords;\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Point} geometry Point geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writePoint_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const hasZ = context['hasZ'];\n const srsName = context['srsName'];\n if (srsName) {\n node.setAttribute('srsName', srsName);\n }\n const coordinates = this.createCoordinatesNode_(node.namespaceURI);\n node.appendChild(coordinates);\n const point = geometry.getCoordinates();\n const coord = this.getCoords_(point, srsName, hasZ);\n writeStringTextNode(coordinates, coord);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/MultiPoint} geometry MultiPoint geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writeMultiPoint_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const hasZ = context['hasZ'];\n const srsName = context['srsName'];\n if (srsName) {\n node.setAttribute('srsName', srsName);\n }\n const points = geometry.getPoints();\n pushSerializeAndPop({node: node, hasZ: hasZ, srsName: srsName},\n this.POINTMEMBER_SERIALIZERS_,\n makeSimpleNodeFactory('pointMember'), points,\n objectStack, undefined, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Point} point Point geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writePointMember_ = function(node, point, objectStack) {\n const child = createElementNS(node.namespaceURI, 'Point');\n node.appendChild(child);\n this.writePoint_(child, point, objectStack);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LinearRing} geometry LinearRing geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writeLinearRing_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const srsName = context['srsName'];\n if (srsName) {\n node.setAttribute('srsName', srsName);\n }\n const coordinates = this.createCoordinatesNode_(node.namespaceURI);\n node.appendChild(coordinates);\n this.writeCoordinates_(coordinates, geometry, objectStack);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/MultiPolygon} geometry MultiPolygon geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writeMultiSurfaceOrPolygon_ = function(node, geometry, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const hasZ = context['hasZ'];\n const srsName = context['srsName'];\n const surface = context['surface'];\n if (srsName) {\n node.setAttribute('srsName', srsName);\n }\n const polygons = geometry.getPolygons();\n pushSerializeAndPop({node: node, hasZ: hasZ, srsName: srsName, surface: surface},\n this.SURFACEORPOLYGONMEMBER_SERIALIZERS_,\n this.MULTIGEOMETRY_MEMBER_NODE_FACTORY_, polygons,\n objectStack, undefined, this);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Polygon} polygon Polygon geometry.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writeSurfaceOrPolygonMember_ = function(node, polygon, objectStack) {\n const child = this.GEOMETRY_NODE_FACTORY_(\n polygon, objectStack);\n if (child) {\n node.appendChild(child);\n this.writeSurfaceOrPolygon_(child, polygon, objectStack);\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {Array.<*>} objectStack Node stack.\n * @private\n */\nGML2.prototype.writeEnvelope = function(node, extent, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const srsName = context['srsName'];\n if (srsName) {\n node.setAttribute('srsName', srsName);\n }\n const keys = ['lowerCorner', 'upperCorner'];\n const values = [extent[0] + ' ' + extent[1], extent[2] + ' ' + extent[3]];\n pushSerializeAndPop(/** @type {module:ol/xml~NodeStackItem} */\n ({node: node}), this.ENVELOPE_SERIALIZERS_,\n OBJECT_PROPERTY_NODE_FACTORY,\n values,\n objectStack, keys, this);\n};\n\n\n/**\n * @const\n * @type {Object.<string, string>}\n */\nconst MULTIGEOMETRY_TO_MEMBER_NODENAME = {\n 'MultiLineString': 'lineStringMember',\n 'MultiCurve': 'curveMember',\n 'MultiPolygon': 'polygonMember',\n 'MultiSurface': 'surfaceMember'\n};\n\n\n/**\n * @const\n * @param {*} value Value.\n * @param {Array.<*>} objectStack Object stack.\n * @param {string=} opt_nodeName Node name.\n * @return {Node|undefined} Node.\n * @private\n */\nGML2.prototype.MULTIGEOMETRY_MEMBER_NODE_FACTORY_ = function(value, objectStack, opt_nodeName) {\n const parentNode = objectStack[objectStack.length - 1].node;\n return createElementNS('http://www.opengis.net/gml',\n MULTIGEOMETRY_TO_MEMBER_NODENAME[parentNode.nodeName]);\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML2.prototype.GEOMETRY_FLAT_COORDINATES_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'coordinates': makeReplacer(GML2.prototype.readFlatCoordinates_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML2.prototype.FLAT_LINEAR_RINGS_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'innerBoundaryIs': GML2.prototype.innerBoundaryIsParser_,\n 'outerBoundaryIs': GML2.prototype.outerBoundaryIsParser_\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML2.prototype.BOX_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'coordinates': makeArrayPusher(\n GML2.prototype.readFlatCoordinates_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n * @private\n */\nGML2.prototype.GEOMETRY_PARSERS_ = {\n 'http://www.opengis.net/gml': {\n 'Point': makeReplacer(GMLBase.prototype.readPoint),\n 'MultiPoint': makeReplacer(\n GMLBase.prototype.readMultiPoint),\n 'LineString': makeReplacer(\n GMLBase.prototype.readLineString),\n 'MultiLineString': makeReplacer(\n GMLBase.prototype.readMultiLineString),\n 'LinearRing': makeReplacer(\n GMLBase.prototype.readLinearRing),\n 'Polygon': makeReplacer(GMLBase.prototype.readPolygon),\n 'MultiPolygon': makeReplacer(\n GMLBase.prototype.readMultiPolygon),\n 'Box': makeReplacer(GML2.prototype.readBox_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n * @private\n */\nGML2.prototype.GEOMETRY_SERIALIZERS_ = {\n 'http://www.opengis.net/gml': {\n 'Curve': makeChildAppender(\n GML2.prototype.writeCurveOrLineString_),\n 'MultiCurve': makeChildAppender(\n GML2.prototype.writeMultiCurveOrLineString_),\n 'Point': makeChildAppender(GML2.prototype.writePoint_),\n 'MultiPoint': makeChildAppender(\n GML2.prototype.writeMultiPoint_),\n 'LineString': makeChildAppender(\n GML2.prototype.writeCurveOrLineString_),\n 'MultiLineString': makeChildAppender(\n GML2.prototype.writeMultiCurveOrLineString_),\n 'LinearRing': makeChildAppender(\n GML2.prototype.writeLinearRing_),\n 'Polygon': makeChildAppender(\n GML2.prototype.writeSurfaceOrPolygon_),\n 'MultiPolygon': makeChildAppender(\n GML2.prototype.writeMultiSurfaceOrPolygon_),\n 'Surface': makeChildAppender(\n GML2.prototype.writeSurfaceOrPolygon_),\n 'MultiSurface': makeChildAppender(\n GML2.prototype.writeMultiSurfaceOrPolygon_),\n 'Envelope': makeChildAppender(\n GML2.prototype.writeEnvelope)\n }\n};\n\n\n/**\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n * @private\n */\nGML2.prototype.LINESTRINGORCURVEMEMBER_SERIALIZERS_ = {\n 'http://www.opengis.net/gml': {\n 'lineStringMember': makeChildAppender(\n GML2.prototype.writeLineStringOrCurveMember_),\n 'curveMember': makeChildAppender(\n GML2.prototype.writeLineStringOrCurveMember_)\n }\n};\n\n\n/**\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n * @private\n */\nGML2.prototype.RING_SERIALIZERS_ = {\n 'http://www.opengis.net/gml': {\n 'outerBoundaryIs': makeChildAppender(GML2.prototype.writeRing_),\n 'innerBoundaryIs': makeChildAppender(GML2.prototype.writeRing_)\n }\n};\n\n\n/**\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n * @private\n */\nGML2.prototype.POINTMEMBER_SERIALIZERS_ = {\n 'http://www.opengis.net/gml': {\n 'pointMember': makeChildAppender(\n GML2.prototype.writePointMember_)\n }\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n * @private\n */\nGML2.prototype.SURFACEORPOLYGONMEMBER_SERIALIZERS_ = {\n 'http://www.opengis.net/gml': {\n 'surfaceMember': makeChildAppender(\n GML2.prototype.writeSurfaceOrPolygonMember_),\n 'polygonMember': makeChildAppender(\n GML2.prototype.writeSurfaceOrPolygonMember_)\n }\n};\n\n\n/**\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n * @private\n */\nGML2.prototype.ENVELOPE_SERIALIZERS_ = {\n 'http://www.opengis.net/gml': {\n 'lowerCorner': makeChildAppender(writeStringTextNode),\n 'upperCorner': makeChildAppender(writeStringTextNode)\n }\n};\n\nexport default GML2;\n","/**\n * @module ol/format/GPX\n */\nimport {inherits} from '../util.js';\nimport Feature from '../Feature.js';\nimport {includes} from '../array.js';\nimport {transformWithOptions} from '../format/Feature.js';\nimport XMLFeature from '../format/XMLFeature.js';\nimport {readString, readDecimal, readNonNegativeInteger, readDateTime, writeStringTextNode, writeNonNegativeIntegerTextNode, writeDecimalTextNode, writeDateTimeTextNode} from '../format/xsd.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport Point from '../geom/Point.js';\nimport {get as getProjection} from '../proj.js';\nimport {createElementNS, makeArrayPusher, makeArraySerializer, makeChildAppender,\n makeObjectPropertySetter, makeSequence, makeSimpleNodeFactory, makeStructureNS,\n OBJECT_PROPERTY_NODE_FACTORY, parseNode, pushParseAndPop, pushSerializeAndPop,\n XML_SCHEMA_INSTANCE_URI} from '../xml.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {function(module:ol/Feature, Node)} [readExtensions] Callback function\n * to process `extensions` nodes. To prevent memory leaks, this callback function must\n * not store any references to the node. Note that the `extensions`\n * node is not allowed in GPX 1.0. Moreover, only `extensions`\n * nodes from `wpt`, `rte` and `trk` can be processed, as those are\n * directly mapped to a feature.\n */\n\n/**\n * @typedef {Object} LayoutOptions\n * @property {boolean} [hasZ]\n * @property {boolean} [hasM]\n */\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the GPX format.\n *\n * @constructor\n * @extends {module:ol/format/XMLFeature}\n * @param {module:ol/format/GPX~Options=} opt_options Options.\n * @api\n */\nconst GPX = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n XMLFeature.call(this);\n\n /**\n * @inheritDoc\n */\n this.dataProjection = getProjection('EPSG:4326');\n\n /**\n * @type {function(module:ol/Feature, Node)|undefined}\n * @private\n */\n this.readExtensions_ = options.readExtensions;\n};\n\ninherits(GPX, XMLFeature);\n\n\n/**\n * @const\n * @type {Array.<null|string>}\n */\nconst NAMESPACE_URIS = [\n null,\n 'http://www.topografix.com/GPX/1/0',\n 'http://www.topografix.com/GPX/1/1'\n];\n\n\n/**\n * @const\n * @type {string}\n */\nconst SCHEMA_LOCATION = 'http://www.topografix.com/GPX/1/1 ' +\n 'http://www.topografix.com/GPX/1/1/gpx.xsd';\n\n\n/**\n * @const\n * @type {Object.<string, function(Node, Array.<*>): (module:ol/Feature|undefined)>}\n */\nconst FEATURE_READER = {\n 'rte': readRte,\n 'trk': readTrk,\n 'wpt': readWpt\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst GPX_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'rte': makeArrayPusher(readRte),\n 'trk': makeArrayPusher(readTrk),\n 'wpt': makeArrayPusher(readWpt)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst LINK_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'text': makeObjectPropertySetter(readString, 'linkText'),\n 'type': makeObjectPropertySetter(readString, 'linkType')\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst RTE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'name': makeObjectPropertySetter(readString),\n 'cmt': makeObjectPropertySetter(readString),\n 'desc': makeObjectPropertySetter(readString),\n 'src': makeObjectPropertySetter(readString),\n 'link': parseLink,\n 'number': makeObjectPropertySetter(readNonNegativeInteger),\n 'extensions': parseExtensions,\n 'type': makeObjectPropertySetter(readString),\n 'rtept': parseRtePt\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst RTEPT_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'ele': makeObjectPropertySetter(readDecimal),\n 'time': makeObjectPropertySetter(readDateTime)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst TRK_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'name': makeObjectPropertySetter(readString),\n 'cmt': makeObjectPropertySetter(readString),\n 'desc': makeObjectPropertySetter(readString),\n 'src': makeObjectPropertySetter(readString),\n 'link': parseLink,\n 'number': makeObjectPropertySetter(readNonNegativeInteger),\n 'type': makeObjectPropertySetter(readString),\n 'extensions': parseExtensions,\n 'trkseg': parseTrkSeg\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst TRKSEG_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'trkpt': parseTrkPt\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst TRKPT_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'ele': makeObjectPropertySetter(readDecimal),\n 'time': makeObjectPropertySetter(readDateTime)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst WPT_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'ele': makeObjectPropertySetter(readDecimal),\n 'time': makeObjectPropertySetter(readDateTime),\n 'magvar': makeObjectPropertySetter(readDecimal),\n 'geoidheight': makeObjectPropertySetter(readDecimal),\n 'name': makeObjectPropertySetter(readString),\n 'cmt': makeObjectPropertySetter(readString),\n 'desc': makeObjectPropertySetter(readString),\n 'src': makeObjectPropertySetter(readString),\n 'link': parseLink,\n 'sym': makeObjectPropertySetter(readString),\n 'type': makeObjectPropertySetter(readString),\n 'fix': makeObjectPropertySetter(readString),\n 'sat': makeObjectPropertySetter(readNonNegativeInteger),\n 'hdop': makeObjectPropertySetter(readDecimal),\n 'vdop': makeObjectPropertySetter(readDecimal),\n 'pdop': makeObjectPropertySetter(readDecimal),\n 'ageofdgpsdata': makeObjectPropertySetter(readDecimal),\n 'dgpsid': makeObjectPropertySetter(readNonNegativeInteger),\n 'extensions': parseExtensions\n });\n\n\n/**\n * @const\n * @type {Array.<string>}\n */\nconst LINK_SEQUENCE = ['text', 'type'];\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst LINK_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'text': makeChildAppender(writeStringTextNode),\n 'type': makeChildAppender(writeStringTextNode)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Array.<string>>}\n */\nconst RTE_SEQUENCE = makeStructureNS(\n NAMESPACE_URIS, [\n 'name', 'cmt', 'desc', 'src', 'link', 'number', 'type', 'rtept'\n ]);\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst RTE_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'name': makeChildAppender(writeStringTextNode),\n 'cmt': makeChildAppender(writeStringTextNode),\n 'desc': makeChildAppender(writeStringTextNode),\n 'src': makeChildAppender(writeStringTextNode),\n 'link': makeChildAppender(writeLink),\n 'number': makeChildAppender(writeNonNegativeIntegerTextNode),\n 'type': makeChildAppender(writeStringTextNode),\n 'rtept': makeArraySerializer(makeChildAppender(writeWptType))\n });\n\n\n/**\n * @const\n * @type {Object.<string, Array.<string>>}\n */\nconst RTEPT_TYPE_SEQUENCE = makeStructureNS(\n NAMESPACE_URIS, [\n 'ele', 'time'\n ]);\n\n\n/**\n * @const\n * @type {Object.<string, Array.<string>>}\n */\nconst TRK_SEQUENCE = makeStructureNS(\n NAMESPACE_URIS, [\n 'name', 'cmt', 'desc', 'src', 'link', 'number', 'type', 'trkseg'\n ]);\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst TRK_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'name': makeChildAppender(writeStringTextNode),\n 'cmt': makeChildAppender(writeStringTextNode),\n 'desc': makeChildAppender(writeStringTextNode),\n 'src': makeChildAppender(writeStringTextNode),\n 'link': makeChildAppender(writeLink),\n 'number': makeChildAppender(writeNonNegativeIntegerTextNode),\n 'type': makeChildAppender(writeStringTextNode),\n 'trkseg': makeArraySerializer(makeChildAppender(writeTrkSeg))\n });\n\n\n/**\n * @const\n * @type {function(*, Array.<*>, string=): (Node|undefined)}\n */\nconst TRKSEG_NODE_FACTORY = makeSimpleNodeFactory('trkpt');\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst TRKSEG_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'trkpt': makeChildAppender(writeWptType)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Array.<string>>}\n */\nconst WPT_TYPE_SEQUENCE = makeStructureNS(\n NAMESPACE_URIS, [\n 'ele', 'time', 'magvar', 'geoidheight', 'name', 'cmt', 'desc', 'src',\n 'link', 'sym', 'type', 'fix', 'sat', 'hdop', 'vdop', 'pdop',\n 'ageofdgpsdata', 'dgpsid'\n ]);\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst WPT_TYPE_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'ele': makeChildAppender(writeDecimalTextNode),\n 'time': makeChildAppender(writeDateTimeTextNode),\n 'magvar': makeChildAppender(writeDecimalTextNode),\n 'geoidheight': makeChildAppender(writeDecimalTextNode),\n 'name': makeChildAppender(writeStringTextNode),\n 'cmt': makeChildAppender(writeStringTextNode),\n 'desc': makeChildAppender(writeStringTextNode),\n 'src': makeChildAppender(writeStringTextNode),\n 'link': makeChildAppender(writeLink),\n 'sym': makeChildAppender(writeStringTextNode),\n 'type': makeChildAppender(writeStringTextNode),\n 'fix': makeChildAppender(writeStringTextNode),\n 'sat': makeChildAppender(writeNonNegativeIntegerTextNode),\n 'hdop': makeChildAppender(writeDecimalTextNode),\n 'vdop': makeChildAppender(writeDecimalTextNode),\n 'pdop': makeChildAppender(writeDecimalTextNode),\n 'ageofdgpsdata': makeChildAppender(writeDecimalTextNode),\n 'dgpsid': makeChildAppender(writeNonNegativeIntegerTextNode)\n });\n\n\n/**\n * @const\n * @type {Object.<string, string>}\n */\nconst GEOMETRY_TYPE_TO_NODENAME = {\n 'Point': 'wpt',\n 'LineString': 'rte',\n 'MultiLineString': 'trk'\n};\n\n\n/**\n * @param {*} value Value.\n * @param {Array.<*>} objectStack Object stack.\n * @param {string=} opt_nodeName Node name.\n * @return {Node|undefined} Node.\n */\nfunction GPX_NODE_FACTORY(value, objectStack, opt_nodeName) {\n const geometry = /** @type {module:ol/Feature} */ (value).getGeometry();\n if (geometry) {\n const nodeName = GEOMETRY_TYPE_TO_NODENAME[geometry.getType()];\n if (nodeName) {\n const parentNode = objectStack[objectStack.length - 1].node;\n return createElementNS(parentNode.namespaceURI, nodeName);\n }\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst GPX_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'rte': makeChildAppender(writeRte),\n 'trk': makeChildAppender(writeTrk),\n 'wpt': makeChildAppender(writeWpt)\n });\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {module:ol/format/GPX~LayoutOptions} layoutOptions Layout options.\n * @param {Node} node Node.\n * @param {!Object} values Values.\n * @return {Array.<number>} Flat coordinates.\n */\nfunction appendCoordinate(flatCoordinates, layoutOptions, node, values) {\n flatCoordinates.push(\n parseFloat(node.getAttribute('lon')),\n parseFloat(node.getAttribute('lat')));\n if ('ele' in values) {\n flatCoordinates.push(/** @type {number} */ (values['ele']));\n delete values['ele'];\n layoutOptions.hasZ = true;\n } else {\n flatCoordinates.push(0);\n }\n if ('time' in values) {\n flatCoordinates.push(/** @type {number} */ (values['time']));\n delete values['time'];\n layoutOptions.hasM = true;\n } else {\n flatCoordinates.push(0);\n }\n return flatCoordinates;\n}\n\n\n/**\n * Choose GeometryLayout based on flags in layoutOptions and adjust flatCoordinates\n * and ends arrays by shrinking them accordingly (removing unused zero entries).\n *\n * @param {module:ol/format/GPX~LayoutOptions} layoutOptions Layout options.\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {Array.<number>=} ends Ends.\n * @return {module:ol/geom/GeometryLayout} Layout.\n */\nfunction applyLayoutOptions(layoutOptions, flatCoordinates, ends) {\n let layout = GeometryLayout.XY;\n let stride = 2;\n if (layoutOptions.hasZ && layoutOptions.hasM) {\n layout = GeometryLayout.XYZM;\n stride = 4;\n } else if (layoutOptions.hasZ) {\n layout = GeometryLayout.XYZ;\n stride = 3;\n } else if (layoutOptions.hasM) {\n layout = GeometryLayout.XYM;\n stride = 3;\n }\n if (stride !== 4) {\n for (let i = 0, ii = flatCoordinates.length / 4; i < ii; i++) {\n flatCoordinates[i * stride] = flatCoordinates[i * 4];\n flatCoordinates[i * stride + 1] = flatCoordinates[i * 4 + 1];\n if (layoutOptions.hasZ) {\n flatCoordinates[i * stride + 2] = flatCoordinates[i * 4 + 2];\n }\n if (layoutOptions.hasM) {\n flatCoordinates[i * stride + 2] = flatCoordinates[i * 4 + 3];\n }\n }\n flatCoordinates.length = flatCoordinates.length / 4 * stride;\n if (ends) {\n for (let i = 0, ii = ends.length; i < ii; i++) {\n ends[i] = ends[i] / 4 * stride;\n }\n }\n }\n return layout;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction parseLink(node, objectStack) {\n const values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n const href = node.getAttribute('href');\n if (href !== null) {\n values['link'] = href;\n }\n parseNode(LINK_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction parseExtensions(node, objectStack) {\n const values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n values['extensionsNode_'] = node;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction parseRtePt(node, objectStack) {\n const values = pushParseAndPop({}, RTEPT_PARSERS, node, objectStack);\n if (values) {\n const rteValues = /** @type {!Object} */ (objectStack[objectStack.length - 1]);\n const flatCoordinates = /** @type {Array.<number>} */ (rteValues['flatCoordinates']);\n const layoutOptions = /** @type {module:ol/format/GPX~LayoutOptions} */ (rteValues['layoutOptions']);\n appendCoordinate(flatCoordinates, layoutOptions, node, values);\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction parseTrkPt(node, objectStack) {\n const values = pushParseAndPop({}, TRKPT_PARSERS, node, objectStack);\n if (values) {\n const trkValues = /** @type {!Object} */ (objectStack[objectStack.length - 1]);\n const flatCoordinates = /** @type {Array.<number>} */ (trkValues['flatCoordinates']);\n const layoutOptions = /** @type {module:ol/format/GPX~LayoutOptions} */ (trkValues['layoutOptions']);\n appendCoordinate(flatCoordinates, layoutOptions, node, values);\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction parseTrkSeg(node, objectStack) {\n const values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n parseNode(TRKSEG_PARSERS, node, objectStack);\n const flatCoordinates = /** @type {Array.<number>} */\n (values['flatCoordinates']);\n const ends = /** @type {Array.<number>} */ (values['ends']);\n ends.push(flatCoordinates.length);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/Feature|undefined} Track.\n */\nfunction readRte(node, objectStack) {\n const options = /** @type {module:ol/format/Feature~ReadOptions} */ (objectStack[0]);\n const values = pushParseAndPop({\n 'flatCoordinates': [],\n 'layoutOptions': {}\n }, RTE_PARSERS, node, objectStack);\n if (!values) {\n return undefined;\n }\n const flatCoordinates = /** @type {Array.<number>} */\n (values['flatCoordinates']);\n delete values['flatCoordinates'];\n const layoutOptions = /** @type {module:ol/format/GPX~LayoutOptions} */ (values['layoutOptions']);\n delete values['layoutOptions'];\n const layout = applyLayoutOptions(layoutOptions, flatCoordinates);\n const geometry = new LineString(null);\n geometry.setFlatCoordinates(layout, flatCoordinates);\n transformWithOptions(geometry, false, options);\n const feature = new Feature(geometry);\n feature.setProperties(values);\n return feature;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/Feature|undefined} Track.\n */\nfunction readTrk(node, objectStack) {\n const options = /** @type {module:ol/format/Feature~ReadOptions} */ (objectStack[0]);\n const values = pushParseAndPop({\n 'flatCoordinates': [],\n 'ends': [],\n 'layoutOptions': {}\n }, TRK_PARSERS, node, objectStack);\n if (!values) {\n return undefined;\n }\n const flatCoordinates = /** @type {Array.<number>} */\n (values['flatCoordinates']);\n delete values['flatCoordinates'];\n const ends = /** @type {Array.<number>} */ (values['ends']);\n delete values['ends'];\n const layoutOptions = /** @type {module:ol/format/GPX~LayoutOptions} */ (values['layoutOptions']);\n delete values['layoutOptions'];\n const layout = applyLayoutOptions(layoutOptions, flatCoordinates, ends);\n const geometry = new MultiLineString(null);\n geometry.setFlatCoordinates(layout, flatCoordinates, ends);\n transformWithOptions(geometry, false, options);\n const feature = new Feature(geometry);\n feature.setProperties(values);\n return feature;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/Feature|undefined} Waypoint.\n */\nfunction readWpt(node, objectStack) {\n const options = /** @type {module:ol/format/Feature~ReadOptions} */ (objectStack[0]);\n const values = pushParseAndPop({}, WPT_PARSERS, node, objectStack);\n if (!values) {\n return undefined;\n }\n const layoutOptions = /** @type {module:ol/format/GPX~LayoutOptions} */ ({});\n const coordinates = appendCoordinate([], layoutOptions, node, values);\n const layout = applyLayoutOptions(layoutOptions, coordinates);\n const geometry = new Point(coordinates, layout);\n transformWithOptions(geometry, false, options);\n const feature = new Feature(geometry);\n feature.setProperties(values);\n return feature;\n}\n\n\n/**\n * @param {Array.<module:ol/Feature>} features List of features.\n * @private\n */\nGPX.prototype.handleReadExtensions_ = function(features) {\n if (!features) {\n features = [];\n }\n for (let i = 0, ii = features.length; i < ii; ++i) {\n const feature = features[i];\n if (this.readExtensions_) {\n const extensionsNode = feature.get('extensionsNode_') || null;\n this.readExtensions_(feature, extensionsNode);\n }\n feature.set('extensionsNode_', undefined);\n }\n};\n\n\n/**\n * Read the first feature from a GPX source.\n * Routes (`<rte>`) are converted into LineString geometries, and tracks (`<trk>`)\n * into MultiLineString. Any properties on route and track waypoints are ignored.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/Feature} Feature.\n * @api\n */\nGPX.prototype.readFeature;\n\n\n/**\n * @inheritDoc\n */\nGPX.prototype.readFeatureFromNode = function(node, opt_options) {\n if (!includes(NAMESPACE_URIS, node.namespaceURI)) {\n return null;\n }\n const featureReader = FEATURE_READER[node.localName];\n if (!featureReader) {\n return null;\n }\n const feature = featureReader(node, [this.getReadOptions(node, opt_options)]);\n if (!feature) {\n return null;\n }\n this.handleReadExtensions_([feature]);\n return feature;\n};\n\n\n/**\n * Read all features from a GPX source.\n * Routes (`<rte>`) are converted into LineString geometries, and tracks (`<trk>`)\n * into MultiLineString. Any properties on route and track waypoints are ignored.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nGPX.prototype.readFeatures;\n\n\n/**\n * @inheritDoc\n */\nGPX.prototype.readFeaturesFromNode = function(node, opt_options) {\n if (!includes(NAMESPACE_URIS, node.namespaceURI)) {\n return [];\n }\n if (node.localName == 'gpx') {\n /** @type {Array.<module:ol/Feature>} */\n const features = pushParseAndPop([], GPX_PARSERS,\n node, [this.getReadOptions(node, opt_options)]);\n if (features) {\n this.handleReadExtensions_(features);\n return features;\n } else {\n return [];\n }\n }\n return [];\n};\n\n\n/**\n * Read the projection from a GPX source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @return {module:ol/proj/Projection} Projection.\n * @api\n */\nGPX.prototype.readProjection;\n\n\n/**\n * @param {Node} node Node.\n * @param {string} value Value for the link's `href` attribute.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeLink(node, value, objectStack) {\n node.setAttribute('href', value);\n const context = objectStack[objectStack.length - 1];\n const properties = context['properties'];\n const link = [\n properties['linkText'],\n properties['linkType']\n ];\n pushSerializeAndPop(/** @type {module:ol/xml~NodeStackItem} */ ({node: node}),\n LINK_SERIALIZERS, OBJECT_PROPERTY_NODE_FACTORY,\n link, objectStack, LINK_SEQUENCE);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeWptType(node, coordinate, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const parentNode = context.node;\n const namespaceURI = parentNode.namespaceURI;\n const properties = context['properties'];\n //FIXME Projection handling\n node.setAttributeNS(null, 'lat', coordinate[1]);\n node.setAttributeNS(null, 'lon', coordinate[0]);\n const geometryLayout = context['geometryLayout'];\n switch (geometryLayout) {\n case GeometryLayout.XYZM:\n if (coordinate[3] !== 0) {\n properties['time'] = coordinate[3];\n }\n // fall through\n case GeometryLayout.XYZ:\n if (coordinate[2] !== 0) {\n properties['ele'] = coordinate[2];\n }\n break;\n case GeometryLayout.XYM:\n if (coordinate[2] !== 0) {\n properties['time'] = coordinate[2];\n }\n break;\n default:\n // pass\n }\n const orderedKeys = (node.nodeName == 'rtept') ?\n RTEPT_TYPE_SEQUENCE[namespaceURI] :\n WPT_TYPE_SEQUENCE[namespaceURI];\n const values = makeSequence(properties, orderedKeys);\n pushSerializeAndPop(/** @type {module:ol/xml~NodeStackItem} */\n ({node: node, 'properties': properties}),\n WPT_TYPE_SERIALIZERS, OBJECT_PROPERTY_NODE_FACTORY,\n values, objectStack, orderedKeys);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/Feature} feature Feature.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeRte(node, feature, objectStack) {\n const options = /** @type {module:ol/format/Feature~WriteOptions} */ (objectStack[0]);\n const properties = feature.getProperties();\n const context = {node: node, 'properties': properties};\n let geometry = feature.getGeometry();\n if (geometry) {\n geometry = /** @type {module:ol/geom/LineString} */ (transformWithOptions(geometry, true, options));\n context['geometryLayout'] = geometry.getLayout();\n properties['rtept'] = geometry.getCoordinates();\n }\n const parentNode = objectStack[objectStack.length - 1].node;\n const orderedKeys = RTE_SEQUENCE[parentNode.namespaceURI];\n const values = makeSequence(properties, orderedKeys);\n pushSerializeAndPop(context,\n RTE_SERIALIZERS, OBJECT_PROPERTY_NODE_FACTORY,\n values, objectStack, orderedKeys);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/Feature} feature Feature.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeTrk(node, feature, objectStack) {\n const options = /** @type {module:ol/format/Feature~WriteOptions} */ (objectStack[0]);\n const properties = feature.getProperties();\n /** @type {module:ol/xml~NodeStackItem} */\n const context = {node: node, 'properties': properties};\n let geometry = feature.getGeometry();\n if (geometry) {\n geometry = /** @type {module:ol/geom/MultiLineString} */\n (transformWithOptions(geometry, true, options));\n properties['trkseg'] = geometry.getLineStrings();\n }\n const parentNode = objectStack[objectStack.length - 1].node;\n const orderedKeys = TRK_SEQUENCE[parentNode.namespaceURI];\n const values = makeSequence(properties, orderedKeys);\n pushSerializeAndPop(context,\n TRK_SERIALIZERS, OBJECT_PROPERTY_NODE_FACTORY,\n values, objectStack, orderedKeys);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LineString} lineString LineString.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeTrkSeg(node, lineString, objectStack) {\n /** @type {module:ol/xml~NodeStackItem} */\n const context = {node: node, 'geometryLayout': lineString.getLayout(),\n 'properties': {}};\n pushSerializeAndPop(context,\n TRKSEG_SERIALIZERS, TRKSEG_NODE_FACTORY,\n lineString.getCoordinates(), objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/Feature} feature Feature.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeWpt(node, feature, objectStack) {\n const options = /** @type {module:ol/format/Feature~WriteOptions} */ (objectStack[0]);\n const context = objectStack[objectStack.length - 1];\n context['properties'] = feature.getProperties();\n let geometry = feature.getGeometry();\n if (geometry) {\n geometry = /** @type {module:ol/geom/Point} */\n (transformWithOptions(geometry, true, options));\n context['geometryLayout'] = geometry.getLayout();\n writeWptType(node, geometry.getCoordinates(), objectStack);\n }\n}\n\n\n/**\n * Encode an array of features in the GPX format.\n * LineString geometries are output as routes (`<rte>`), and MultiLineString\n * as tracks (`<trk>`).\n *\n * @function\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} Result.\n * @api\n */\nGPX.prototype.writeFeatures;\n\n\n/**\n * Encode an array of features in the GPX format as an XML node.\n * LineString geometries are output as routes (`<rte>`), and MultiLineString\n * as tracks (`<trk>`).\n *\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Options.\n * @return {Node} Node.\n * @override\n * @api\n */\nGPX.prototype.writeFeaturesNode = function(features, opt_options) {\n opt_options = this.adaptOptions(opt_options);\n //FIXME Serialize metadata\n const gpx = createElementNS('http://www.topografix.com/GPX/1/1', 'gpx');\n const xmlnsUri = 'http://www.w3.org/2000/xmlns/';\n gpx.setAttributeNS(xmlnsUri, 'xmlns:xsi', XML_SCHEMA_INSTANCE_URI);\n gpx.setAttributeNS(XML_SCHEMA_INSTANCE_URI, 'xsi:schemaLocation', SCHEMA_LOCATION);\n gpx.setAttribute('version', '1.1');\n gpx.setAttribute('creator', 'OpenLayers');\n\n pushSerializeAndPop(/** @type {module:ol/xml~NodeStackItem} */\n ({node: gpx}), GPX_SERIALIZERS, GPX_NODE_FACTORY, features, [opt_options]);\n return gpx;\n};\nexport default GPX;\n","/**\n * @module ol/geom/GeometryCollection\n */\nimport {inherits} from '../util.js';\nimport {listen, unlisten} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {createOrUpdateEmpty, closestSquaredDistanceXY, extend, getCenter} from '../extent.js';\nimport Geometry from '../geom/Geometry.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport {clear} from '../obj.js';\n\n/**\n * @classdesc\n * An array of {@link module:ol/geom/Geometry} objects.\n *\n * @constructor\n * @extends {module:ol/geom/Geometry}\n * @param {Array.<module:ol/geom/Geometry>=} opt_geometries Geometries.\n * @api\n */\nconst GeometryCollection = function(opt_geometries) {\n\n Geometry.call(this);\n\n /**\n * @private\n * @type {Array.<module:ol/geom/Geometry>}\n */\n this.geometries_ = opt_geometries ? opt_geometries : null;\n\n this.listenGeometriesChange_();\n};\n\ninherits(GeometryCollection, Geometry);\n\n\n/**\n * @param {Array.<module:ol/geom/Geometry>} geometries Geometries.\n * @return {Array.<module:ol/geom/Geometry>} Cloned geometries.\n */\nfunction cloneGeometries(geometries) {\n const clonedGeometries = [];\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n clonedGeometries.push(geometries[i].clone());\n }\n return clonedGeometries;\n}\n\n\n/**\n * @private\n */\nGeometryCollection.prototype.unlistenGeometriesChange_ = function() {\n if (!this.geometries_) {\n return;\n }\n for (let i = 0, ii = this.geometries_.length; i < ii; ++i) {\n unlisten(\n this.geometries_[i], EventType.CHANGE,\n this.changed, this);\n }\n};\n\n\n/**\n * @private\n */\nGeometryCollection.prototype.listenGeometriesChange_ = function() {\n if (!this.geometries_) {\n return;\n }\n for (let i = 0, ii = this.geometries_.length; i < ii; ++i) {\n listen(\n this.geometries_[i], EventType.CHANGE,\n this.changed, this);\n }\n};\n\n\n/**\n * Make a complete copy of the geometry.\n * @return {!module:ol/geom/GeometryCollection} Clone.\n * @override\n * @api\n */\nGeometryCollection.prototype.clone = function() {\n const geometryCollection = new GeometryCollection(null);\n geometryCollection.setGeometries(this.geometries_);\n return geometryCollection;\n};\n\n\n/**\n * @inheritDoc\n */\nGeometryCollection.prototype.closestPointXY = function(x, y, closestPoint, minSquaredDistance) {\n if (minSquaredDistance < closestSquaredDistanceXY(this.getExtent(), x, y)) {\n return minSquaredDistance;\n }\n const geometries = this.geometries_;\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n minSquaredDistance = geometries[i].closestPointXY(\n x, y, closestPoint, minSquaredDistance);\n }\n return minSquaredDistance;\n};\n\n\n/**\n * @inheritDoc\n */\nGeometryCollection.prototype.containsXY = function(x, y) {\n const geometries = this.geometries_;\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n if (geometries[i].containsXY(x, y)) {\n return true;\n }\n }\n return false;\n};\n\n\n/**\n * @inheritDoc\n */\nGeometryCollection.prototype.computeExtent = function(extent) {\n createOrUpdateEmpty(extent);\n const geometries = this.geometries_;\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n extend(extent, geometries[i].getExtent());\n }\n return extent;\n};\n\n\n/**\n * Return the geometries that make up this geometry collection.\n * @return {Array.<module:ol/geom/Geometry>} Geometries.\n * @api\n */\nGeometryCollection.prototype.getGeometries = function() {\n return cloneGeometries(this.geometries_);\n};\n\n\n/**\n * @return {Array.<module:ol/geom/Geometry>} Geometries.\n */\nGeometryCollection.prototype.getGeometriesArray = function() {\n return this.geometries_;\n};\n\n\n/**\n * @inheritDoc\n */\nGeometryCollection.prototype.getSimplifiedGeometry = function(squaredTolerance) {\n if (this.simplifiedGeometryRevision != this.getRevision()) {\n clear(this.simplifiedGeometryCache);\n this.simplifiedGeometryMaxMinSquaredTolerance = 0;\n this.simplifiedGeometryRevision = this.getRevision();\n }\n if (squaredTolerance < 0 ||\n (this.simplifiedGeometryMaxMinSquaredTolerance !== 0 &&\n squaredTolerance < this.simplifiedGeometryMaxMinSquaredTolerance)) {\n return this;\n }\n const key = squaredTolerance.toString();\n if (this.simplifiedGeometryCache.hasOwnProperty(key)) {\n return this.simplifiedGeometryCache[key];\n } else {\n const simplifiedGeometries = [];\n const geometries = this.geometries_;\n let simplified = false;\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n const geometry = geometries[i];\n const simplifiedGeometry = geometry.getSimplifiedGeometry(squaredTolerance);\n simplifiedGeometries.push(simplifiedGeometry);\n if (simplifiedGeometry !== geometry) {\n simplified = true;\n }\n }\n if (simplified) {\n const simplifiedGeometryCollection = new GeometryCollection(null);\n simplifiedGeometryCollection.setGeometriesArray(simplifiedGeometries);\n this.simplifiedGeometryCache[key] = simplifiedGeometryCollection;\n return simplifiedGeometryCollection;\n } else {\n this.simplifiedGeometryMaxMinSquaredTolerance = squaredTolerance;\n return this;\n }\n }\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nGeometryCollection.prototype.getType = function() {\n return GeometryType.GEOMETRY_COLLECTION;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nGeometryCollection.prototype.intersectsExtent = function(extent) {\n const geometries = this.geometries_;\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n if (geometries[i].intersectsExtent(extent)) {\n return true;\n }\n }\n return false;\n};\n\n\n/**\n * @return {boolean} Is empty.\n */\nGeometryCollection.prototype.isEmpty = function() {\n return this.geometries_.length === 0;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nGeometryCollection.prototype.rotate = function(angle, anchor) {\n const geometries = this.geometries_;\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n geometries[i].rotate(angle, anchor);\n }\n this.changed();\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nGeometryCollection.prototype.scale = function(sx, opt_sy, opt_anchor) {\n let anchor = opt_anchor;\n if (!anchor) {\n anchor = getCenter(this.getExtent());\n }\n const geometries = this.geometries_;\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n geometries[i].scale(sx, opt_sy, anchor);\n }\n this.changed();\n};\n\n\n/**\n * Set the geometries that make up this geometry collection.\n * @param {Array.<module:ol/geom/Geometry>} geometries Geometries.\n * @api\n */\nGeometryCollection.prototype.setGeometries = function(geometries) {\n this.setGeometriesArray(cloneGeometries(geometries));\n};\n\n\n/**\n * @param {Array.<module:ol/geom/Geometry>} geometries Geometries.\n */\nGeometryCollection.prototype.setGeometriesArray = function(geometries) {\n this.unlistenGeometriesChange_();\n this.geometries_ = geometries;\n this.listenGeometriesChange_();\n this.changed();\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nGeometryCollection.prototype.applyTransform = function(transformFn) {\n const geometries = this.geometries_;\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n geometries[i].applyTransform(transformFn);\n }\n this.changed();\n};\n\n\n/**\n * Translate the geometry.\n * @param {number} deltaX Delta X.\n * @param {number} deltaY Delta Y.\n * @override\n * @api\n */\nGeometryCollection.prototype.translate = function(deltaX, deltaY) {\n const geometries = this.geometries_;\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n geometries[i].translate(deltaX, deltaY);\n }\n this.changed();\n};\n\n\n/**\n * @inheritDoc\n */\nGeometryCollection.prototype.disposeInternal = function() {\n this.unlistenGeometriesChange_();\n Geometry.prototype.disposeInternal.call(this);\n};\nexport default GeometryCollection;\n","/**\n * @module ol/format/GeoJSON\n */\n// TODO: serialize dataProjection as crs member when writing\n// see https://github.com/openlayers/openlayers/issues/2078\n\nimport {inherits} from '../util.js';\nimport {assert} from '../asserts.js';\nimport Feature from '../Feature.js';\nimport {transformWithOptions} from '../format/Feature.js';\nimport JSONFeature from '../format/JSONFeature.js';\nimport GeometryCollection from '../geom/GeometryCollection.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {assign, isEmpty} from '../obj.js';\nimport {get as getProjection} from '../proj.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/proj~ProjectionLike} [dataProjection='EPSG:4326'] Default data projection.\n * @property {module:ol/proj~ProjectionLike} [featureProjection] Projection for features read or\n * written by the format. Options passed to read or write methods will take precedence.\n * @property {string} [geometryName] Geometry name to use when creating features.\n * @property {boolean} [extractGeometryName=false] Certain GeoJSON providers include\n * the geometry_name field in the feature GeoJSON. If set to `true` the GeoJSON reader\n * will look for that field to set the geometry name. If both this field is set to `true`\n * and a `geometryName` is provided, the `geometryName` will take precedence.\n */\n\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the GeoJSON format.\n *\n * @constructor\n * @extends {module:ol/format/JSONFeature}\n * @param {module:ol/format/GeoJSON~Options=} opt_options Options.\n * @api\n */\nconst GeoJSON = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n JSONFeature.call(this);\n\n /**\n * @inheritDoc\n */\n this.dataProjection = getProjection(\n options.dataProjection ?\n options.dataProjection : 'EPSG:4326');\n\n if (options.featureProjection) {\n this.defaultFeatureProjection = getProjection(options.featureProjection);\n }\n\n /**\n * Name of the geometry attribute for features.\n * @type {string|undefined}\n * @private\n */\n this.geometryName_ = options.geometryName;\n\n /**\n * Look for the geometry name in the feature GeoJSON\n * @type {boolean|undefined}\n * @private\n */\n this.extractGeometryName_ = options.extractGeometryName;\n\n};\n\ninherits(GeoJSON, JSONFeature);\n\n\n/**\n * @const\n * @type {Object.<string, function(GeoJSONObject): module:ol/geom/Geometry>}\n */\nconst GEOMETRY_READERS = {\n 'Point': readPointGeometry,\n 'LineString': readLineStringGeometry,\n 'Polygon': readPolygonGeometry,\n 'MultiPoint': readMultiPointGeometry,\n 'MultiLineString': readMultiLineStringGeometry,\n 'MultiPolygon': readMultiPolygonGeometry,\n 'GeometryCollection': readGeometryCollectionGeometry\n};\n\n\n/**\n * @const\n * @type {Object.<string, function(module:ol/geom/Geometry, module:ol/format/Feature~WriteOptions=): (GeoJSONGeometry|GeoJSONGeometryCollection)>}\n */\nconst GEOMETRY_WRITERS = {\n 'Point': writePointGeometry,\n 'LineString': writeLineStringGeometry,\n 'Polygon': writePolygonGeometry,\n 'MultiPoint': writeMultiPointGeometry,\n 'MultiLineString': writeMultiLineStringGeometry,\n 'MultiPolygon': writeMultiPolygonGeometry,\n 'GeometryCollection': writeGeometryCollectionGeometry,\n 'Circle': writeEmptyGeometryCollectionGeometry\n};\n\n\n/**\n * @param {GeoJSONGeometry|GeoJSONGeometryCollection} object Object.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/geom/Geometry} Geometry.\n */\nfunction readGeometry(object, opt_options) {\n if (!object) {\n return null;\n }\n const geometryReader = GEOMETRY_READERS[object.type];\n return (\n /** @type {module:ol/geom/Geometry} */ (transformWithOptions(geometryReader(object), false, opt_options))\n );\n}\n\n\n/**\n * @param {GeoJSONGeometryCollection} object Object.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/geom/GeometryCollection} Geometry collection.\n */\nfunction readGeometryCollectionGeometry(object, opt_options) {\n const geometries = object.geometries.map(\n /**\n * @param {GeoJSONGeometry} geometry Geometry.\n * @return {module:ol/geom/Geometry} geometry Geometry.\n */\n function(geometry) {\n return readGeometry(geometry, opt_options);\n });\n return new GeometryCollection(geometries);\n}\n\n\n/**\n * @param {GeoJSONGeometry} object Object.\n * @return {module:ol/geom/Point} Point.\n */\nfunction readPointGeometry(object) {\n return new Point(object.coordinates);\n}\n\n\n/**\n * @param {GeoJSONGeometry} object Object.\n * @return {module:ol/geom/LineString} LineString.\n */\nfunction readLineStringGeometry(object) {\n return new LineString(object.coordinates);\n}\n\n\n/**\n * @param {GeoJSONGeometry} object Object.\n * @return {module:ol/geom/MultiLineString} MultiLineString.\n */\nfunction readMultiLineStringGeometry(object) {\n return new MultiLineString(object.coordinates);\n}\n\n\n/**\n * @param {GeoJSONGeometry} object Object.\n * @return {module:ol/geom/MultiPoint} MultiPoint.\n */\nfunction readMultiPointGeometry(object) {\n return new MultiPoint(object.coordinates);\n}\n\n\n/**\n * @param {GeoJSONGeometry} object Object.\n * @return {module:ol/geom/MultiPolygon} MultiPolygon.\n */\nfunction readMultiPolygonGeometry(object) {\n return new MultiPolygon(object.coordinates);\n}\n\n\n/**\n * @param {GeoJSONGeometry} object Object.\n * @return {module:ol/geom/Polygon} Polygon.\n */\nfunction readPolygonGeometry(object) {\n return new Polygon(object.coordinates);\n}\n\n\n/**\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {GeoJSONGeometry|GeoJSONGeometryCollection} GeoJSON geometry.\n */\nfunction writeGeometry(geometry, opt_options) {\n const geometryWriter = GEOMETRY_WRITERS[geometry.getType()];\n return geometryWriter(/** @type {module:ol/geom/Geometry} */ (\n transformWithOptions(geometry, true, opt_options)), opt_options);\n}\n\n\n/**\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @return {GeoJSONGeometryCollection} Empty GeoJSON geometry collection.\n */\nfunction writeEmptyGeometryCollectionGeometry(geometry) {\n return /** @type {GeoJSONGeometryCollection} */ ({\n type: 'GeometryCollection',\n geometries: []\n });\n}\n\n\n/**\n * @param {module:ol/geom/GeometryCollection} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {GeoJSONGeometryCollection} GeoJSON geometry collection.\n */\nfunction writeGeometryCollectionGeometry(geometry, opt_options) {\n const geometries = geometry.getGeometriesArray().map(function(geometry) {\n const options = assign({}, opt_options);\n delete options.featureProjection;\n return writeGeometry(geometry, options);\n });\n return /** @type {GeoJSONGeometryCollection} */ ({\n type: 'GeometryCollection',\n geometries: geometries\n });\n}\n\n\n/**\n * @param {module:ol/geom/LineString} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {GeoJSONGeometry} GeoJSON geometry.\n */\nfunction writeLineStringGeometry(geometry, opt_options) {\n return /** @type {GeoJSONGeometry} */ ({\n type: 'LineString',\n coordinates: geometry.getCoordinates()\n });\n}\n\n\n/**\n * @param {module:ol/geom/MultiLineString} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {GeoJSONGeometry} GeoJSON geometry.\n */\nfunction writeMultiLineStringGeometry(geometry, opt_options) {\n return /** @type {GeoJSONGeometry} */ ({\n type: 'MultiLineString',\n coordinates: geometry.getCoordinates()\n });\n}\n\n\n/**\n * @param {module:ol/geom/MultiPoint} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {GeoJSONGeometry} GeoJSON geometry.\n */\nfunction writeMultiPointGeometry(geometry, opt_options) {\n return /** @type {GeoJSONGeometry} */ ({\n type: 'MultiPoint',\n coordinates: geometry.getCoordinates()\n });\n}\n\n\n/**\n * @param {module:ol/geom/MultiPolygon} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {GeoJSONGeometry} GeoJSON geometry.\n */\nfunction writeMultiPolygonGeometry(geometry, opt_options) {\n let right;\n if (opt_options) {\n right = opt_options.rightHanded;\n }\n return /** @type {GeoJSONGeometry} */ ({\n type: 'MultiPolygon',\n coordinates: geometry.getCoordinates(right)\n });\n}\n\n\n/**\n * @param {module:ol/geom/Point} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {GeoJSONGeometry} GeoJSON geometry.\n */\nfunction writePointGeometry(geometry, opt_options) {\n return /** @type {GeoJSONGeometry} */ ({\n type: 'Point',\n coordinates: geometry.getCoordinates()\n });\n}\n\n\n/**\n * @param {module:ol/geom/Polygon} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {GeoJSONGeometry} GeoJSON geometry.\n */\nfunction writePolygonGeometry(geometry, opt_options) {\n let right;\n if (opt_options) {\n right = opt_options.rightHanded;\n }\n return /** @type {GeoJSONGeometry} */ ({\n type: 'Polygon',\n coordinates: geometry.getCoordinates(right)\n });\n}\n\n\n/**\n * Read a feature from a GeoJSON Feature source. Only works for Feature or\n * geometry types. Use {@link module:ol/format/GeoJSON#readFeatures} to read\n * FeatureCollection source. If feature at source has an id, it will be used\n * as Feature id by calling {@link module:ol/Feature#setId} internally.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/Feature} Feature.\n * @api\n */\nGeoJSON.prototype.readFeature;\n\n\n/**\n * Read all features from a GeoJSON source. Works for all GeoJSON types.\n * If the source includes only geometries, features will be created with those\n * geometries.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nGeoJSON.prototype.readFeatures;\n\n\n/**\n * @inheritDoc\n */\nGeoJSON.prototype.readFeatureFromObject = function(object, opt_options) {\n /**\n * @type {GeoJSONFeature}\n */\n let geoJSONFeature = null;\n if (object.type === 'Feature') {\n geoJSONFeature = /** @type {GeoJSONFeature} */ (object);\n } else {\n geoJSONFeature = /** @type {GeoJSONFeature} */ ({\n type: 'Feature',\n geometry: /** @type {GeoJSONGeometry|GeoJSONGeometryCollection} */ (object)\n });\n }\n\n const geometry = readGeometry(geoJSONFeature.geometry, opt_options);\n const feature = new Feature();\n if (this.geometryName_) {\n feature.setGeometryName(this.geometryName_);\n } else if (this.extractGeometryName_ && geoJSONFeature.geometry_name !== undefined) {\n feature.setGeometryName(geoJSONFeature.geometry_name);\n }\n feature.setGeometry(geometry);\n if (geoJSONFeature.id !== undefined) {\n feature.setId(geoJSONFeature.id);\n }\n if (geoJSONFeature.properties) {\n feature.setProperties(geoJSONFeature.properties);\n }\n return feature;\n};\n\n\n/**\n * @inheritDoc\n */\nGeoJSON.prototype.readFeaturesFromObject = function(object, opt_options) {\n const geoJSONObject = /** @type {GeoJSONObject} */ (object);\n /** @type {Array.<module:ol/Feature>} */\n let features = null;\n if (geoJSONObject.type === 'FeatureCollection') {\n const geoJSONFeatureCollection = /** @type {GeoJSONFeatureCollection} */ (object);\n features = [];\n const geoJSONFeatures = geoJSONFeatureCollection.features;\n for (let i = 0, ii = geoJSONFeatures.length; i < ii; ++i) {\n features.push(this.readFeatureFromObject(geoJSONFeatures[i], opt_options));\n }\n } else {\n features = [this.readFeatureFromObject(object, opt_options)];\n }\n return features;\n};\n\n\n/**\n * Read a geometry from a GeoJSON source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/geom/Geometry} Geometry.\n * @api\n */\nGeoJSON.prototype.readGeometry;\n\n\n/**\n * @inheritDoc\n */\nGeoJSON.prototype.readGeometryFromObject = function(object, opt_options) {\n return readGeometry(/** @type {GeoJSONGeometry} */ (object), opt_options);\n};\n\n\n/**\n * Read the projection from a GeoJSON source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @return {module:ol/proj/Projection} Projection.\n * @api\n */\nGeoJSON.prototype.readProjection;\n\n\n/**\n * @inheritDoc\n */\nGeoJSON.prototype.readProjectionFromObject = function(object) {\n const geoJSONObject = /** @type {GeoJSONObject} */ (object);\n const crs = geoJSONObject.crs;\n let projection;\n if (crs) {\n if (crs.type == 'name') {\n projection = getProjection(crs.properties.name);\n } else {\n assert(false, 36); // Unknown SRS type\n }\n } else {\n projection = this.dataProjection;\n }\n return (\n /** @type {module:ol/proj/Projection} */ (projection)\n );\n};\n\n\n/**\n * Encode a feature as a GeoJSON Feature string.\n *\n * @function\n * @param {module:ol/Feature} feature Feature.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} GeoJSON.\n * @override\n * @api\n */\nGeoJSON.prototype.writeFeature;\n\n\n/**\n * Encode a feature as a GeoJSON Feature object.\n *\n * @param {module:ol/Feature} feature Feature.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {GeoJSONFeature} Object.\n * @override\n * @api\n */\nGeoJSON.prototype.writeFeatureObject = function(feature, opt_options) {\n opt_options = this.adaptOptions(opt_options);\n\n const object = /** @type {GeoJSONFeature} */ ({\n 'type': 'Feature'\n });\n const id = feature.getId();\n if (id !== undefined) {\n object.id = id;\n }\n const geometry = feature.getGeometry();\n if (geometry) {\n object.geometry = writeGeometry(geometry, opt_options);\n } else {\n object.geometry = null;\n }\n const properties = feature.getProperties();\n delete properties[feature.getGeometryName()];\n if (!isEmpty(properties)) {\n object.properties = properties;\n } else {\n object.properties = null;\n }\n return object;\n};\n\n\n/**\n * Encode an array of features as GeoJSON.\n *\n * @function\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} GeoJSON.\n * @api\n */\nGeoJSON.prototype.writeFeatures;\n\n\n/**\n * Encode an array of features as a GeoJSON object.\n *\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {GeoJSONFeatureCollection} GeoJSON Object.\n * @override\n * @api\n */\nGeoJSON.prototype.writeFeaturesObject = function(features, opt_options) {\n opt_options = this.adaptOptions(opt_options);\n const objects = [];\n for (let i = 0, ii = features.length; i < ii; ++i) {\n objects.push(this.writeFeatureObject(features[i], opt_options));\n }\n return /** @type {GeoJSONFeatureCollection} */ ({\n type: 'FeatureCollection',\n features: objects\n });\n};\n\n\n/**\n * Encode a geometry as a GeoJSON string.\n *\n * @function\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} GeoJSON.\n * @api\n */\nGeoJSON.prototype.writeGeometry;\n\n\n/**\n * Encode a geometry as a GeoJSON object.\n *\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {GeoJSONGeometry|GeoJSONGeometryCollection} Object.\n * @override\n * @api\n */\nGeoJSON.prototype.writeGeometryObject = function(geometry, opt_options) {\n return writeGeometry(geometry, this.adaptOptions(opt_options));\n};\nexport default GeoJSON;\n","/**\n * @module ol/format/TextFeature\n */\nimport {inherits} from '../util.js';\nimport FeatureFormat from '../format/Feature.js';\nimport FormatType from '../format/FormatType.js';\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for text feature formats.\n *\n * @constructor\n * @abstract\n * @extends {module:ol/format/Feature}\n */\nconst TextFeature = function() {\n FeatureFormat.call(this);\n};\n\ninherits(TextFeature, FeatureFormat);\n\n\n/**\n * @param {Document|Node|Object|string} source Source.\n * @return {string} Text.\n */\nfunction getText(source) {\n if (typeof source === 'string') {\n return source;\n } else {\n return '';\n }\n}\n\n\n/**\n * @inheritDoc\n */\nTextFeature.prototype.getType = function() {\n return FormatType.TEXT;\n};\n\n\n/**\n * @inheritDoc\n */\nTextFeature.prototype.readFeature = function(source, opt_options) {\n return this.readFeatureFromText(getText(source), this.adaptOptions(opt_options));\n};\n\n\n/**\n * @abstract\n * @param {string} text Text.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @protected\n * @return {module:ol/Feature} Feature.\n */\nTextFeature.prototype.readFeatureFromText = function(text, opt_options) {};\n\n\n/**\n * @inheritDoc\n */\nTextFeature.prototype.readFeatures = function(source, opt_options) {\n return this.readFeaturesFromText(getText(source), this.adaptOptions(opt_options));\n};\n\n\n/**\n * @abstract\n * @param {string} text Text.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @protected\n * @return {Array.<module:ol/Feature>} Features.\n */\nTextFeature.prototype.readFeaturesFromText = function(text, opt_options) {};\n\n\n/**\n * @inheritDoc\n */\nTextFeature.prototype.readGeometry = function(source, opt_options) {\n return this.readGeometryFromText(getText(source), this.adaptOptions(opt_options));\n};\n\n\n/**\n * @abstract\n * @param {string} text Text.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @protected\n * @return {module:ol/geom/Geometry} Geometry.\n */\nTextFeature.prototype.readGeometryFromText = function(text, opt_options) {};\n\n\n/**\n * @inheritDoc\n */\nTextFeature.prototype.readProjection = function(source) {\n return this.readProjectionFromText(getText(source));\n};\n\n\n/**\n * @param {string} text Text.\n * @protected\n * @return {module:ol/proj/Projection} Projection.\n */\nTextFeature.prototype.readProjectionFromText = function(text) {\n return this.dataProjection;\n};\n\n\n/**\n * @inheritDoc\n */\nTextFeature.prototype.writeFeature = function(feature, opt_options) {\n return this.writeFeatureText(feature, this.adaptOptions(opt_options));\n};\n\n\n/**\n * @abstract\n * @param {module:ol/Feature} feature Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @protected\n * @return {string} Text.\n */\nTextFeature.prototype.writeFeatureText = function(feature, opt_options) {};\n\n\n/**\n * @inheritDoc\n */\nTextFeature.prototype.writeFeatures = function(features, opt_options) {\n return this.writeFeaturesText(features, this.adaptOptions(opt_options));\n};\n\n\n/**\n * @abstract\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @protected\n * @return {string} Text.\n */\nTextFeature.prototype.writeFeaturesText = function(features, opt_options) {};\n\n\n/**\n * @inheritDoc\n */\nTextFeature.prototype.writeGeometry = function(geometry, opt_options) {\n return this.writeGeometryText(geometry, this.adaptOptions(opt_options));\n};\n\n\n/**\n * @abstract\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @protected\n * @return {string} Text.\n */\nTextFeature.prototype.writeGeometryText = function(geometry, opt_options) {};\nexport default TextFeature;\n","/**\n * @module ol/format/IGC\n */\nimport {inherits} from '../util.js';\nimport Feature from '../Feature.js';\nimport {transformWithOptions} from '../format/Feature.js';\nimport TextFeature from '../format/TextFeature.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport LineString from '../geom/LineString.js';\nimport {get as getProjection} from '../proj.js';\n\n/**\n * IGC altitude/z. One of 'barometric', 'gps', 'none'.\n * @enum {string}\n */\nconst IGCZ = {\n BAROMETRIC: 'barometric',\n GPS: 'gps',\n NONE: 'none'\n};\n\n\n/**\n * @typedef {Object} Options\n * @property {IGCZ|string} [altitudeMode='none'] Altitude mode. Possible\n * values are `'barometric'`, `'gps'`, and `'none'`.\n */\n\n\n/**\n * @classdesc\n * Feature format for `*.igc` flight recording files.\n *\n * @constructor\n * @extends {module:ol/format/TextFeature}\n * @param {module:ol/format/IGC~Options=} opt_options Options.\n * @api\n */\nconst IGC = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n TextFeature.call(this);\n\n /**\n * @inheritDoc\n */\n this.dataProjection = getProjection('EPSG:4326');\n\n /**\n * @private\n * @type {IGCZ}\n */\n this.altitudeMode_ = options.altitudeMode ? options.altitudeMode : IGCZ.NONE;\n};\n\ninherits(IGC, TextFeature);\n\n\n/**\n * @const\n * @type {RegExp}\n */\nconst B_RECORD_RE =\n /^B(\\d{2})(\\d{2})(\\d{2})(\\d{2})(\\d{5})([NS])(\\d{3})(\\d{5})([EW])([AV])(\\d{5})(\\d{5})/;\n\n\n/**\n * @const\n * @type {RegExp}\n */\nconst H_RECORD_RE = /^H.([A-Z]{3}).*?:(.*)/;\n\n\n/**\n * @const\n * @type {RegExp}\n */\nconst HFDTE_RECORD_RE = /^HFDTE(\\d{2})(\\d{2})(\\d{2})/;\n\n\n/**\n * A regular expression matching the newline characters `\\r\\n`, `\\r` and `\\n`.\n *\n * @const\n * @type {RegExp}\n */\nconst NEWLINE_RE = /\\r\\n|\\r|\\n/;\n\n\n/**\n * Read the feature from the IGC source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/Feature} Feature.\n * @api\n */\nIGC.prototype.readFeature;\n\n\n/**\n * @inheritDoc\n */\nIGC.prototype.readFeatureFromText = function(text, opt_options) {\n const altitudeMode = this.altitudeMode_;\n const lines = text.split(NEWLINE_RE);\n /** @type {Object.<string, string>} */\n const properties = {};\n const flatCoordinates = [];\n let year = 2000;\n let month = 0;\n let day = 1;\n let lastDateTime = -1;\n let i, ii;\n for (i = 0, ii = lines.length; i < ii; ++i) {\n const line = lines[i];\n let m;\n if (line.charAt(0) == 'B') {\n m = B_RECORD_RE.exec(line);\n if (m) {\n const hour = parseInt(m[1], 10);\n const minute = parseInt(m[2], 10);\n const second = parseInt(m[3], 10);\n let y = parseInt(m[4], 10) + parseInt(m[5], 10) / 60000;\n if (m[6] == 'S') {\n y = -y;\n }\n let x = parseInt(m[7], 10) + parseInt(m[8], 10) / 60000;\n if (m[9] == 'W') {\n x = -x;\n }\n flatCoordinates.push(x, y);\n if (altitudeMode != IGCZ.NONE) {\n let z;\n if (altitudeMode == IGCZ.GPS) {\n z = parseInt(m[11], 10);\n } else if (altitudeMode == IGCZ.BAROMETRIC) {\n z = parseInt(m[12], 10);\n } else {\n z = 0;\n }\n flatCoordinates.push(z);\n }\n let dateTime = Date.UTC(year, month, day, hour, minute, second);\n // Detect UTC midnight wrap around.\n if (dateTime < lastDateTime) {\n dateTime = Date.UTC(year, month, day + 1, hour, minute, second);\n }\n flatCoordinates.push(dateTime / 1000);\n lastDateTime = dateTime;\n }\n } else if (line.charAt(0) == 'H') {\n m = HFDTE_RECORD_RE.exec(line);\n if (m) {\n day = parseInt(m[1], 10);\n month = parseInt(m[2], 10) - 1;\n year = 2000 + parseInt(m[3], 10);\n } else {\n m = H_RECORD_RE.exec(line);\n if (m) {\n properties[m[1]] = m[2].trim();\n }\n }\n }\n }\n if (flatCoordinates.length === 0) {\n return null;\n }\n const lineString = new LineString(null);\n const layout = altitudeMode == IGCZ.NONE ? GeometryLayout.XYM : GeometryLayout.XYZM;\n lineString.setFlatCoordinates(layout, flatCoordinates);\n const feature = new Feature(transformWithOptions(lineString, false, opt_options));\n feature.setProperties(properties);\n return feature;\n};\n\n\n/**\n * Read the feature from the source. As IGC sources contain a single\n * feature, this will return the feature in an array.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nIGC.prototype.readFeatures;\n\n\n/**\n * @inheritDoc\n */\nIGC.prototype.readFeaturesFromText = function(text, opt_options) {\n const feature = this.readFeatureFromText(text, opt_options);\n if (feature) {\n return [feature];\n } else {\n return [];\n }\n};\n\n\n/**\n * Read the projection from the IGC source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @return {module:ol/proj/Projection} Projection.\n * @api\n */\nIGC.prototype.readProjection;\n\n\n/**\n * Not implemented.\n * @inheritDoc\n */\nIGC.prototype.writeFeatureText = function(feature, opt_options) {};\n\n\n/**\n * Not implemented.\n * @inheritDoc\n */\nIGC.prototype.writeFeaturesText = function(features, opt_options) {};\n\n\n/**\n * Not implemented.\n * @inheritDoc\n */\nIGC.prototype.writeGeometryText = function(geometry, opt_options) {};\n\n\n/**\n * Not implemented.\n * @inheritDoc\n */\nIGC.prototype.readGeometryFromText = function(text, opt_options) {};\nexport default IGC;\n","/**\n * @module ol/style/IconAnchorUnits\n */\n\n/**\n * Icon anchor units. One of 'fraction', 'pixels'.\n * @enum {string}\n */\nexport default {\n FRACTION: 'fraction',\n PIXELS: 'pixels'\n};\n","/**\n * @module ol/style/IconImage\n */\nimport {inherits} from '../util.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {listenOnce, unlistenByKey} from '../events.js';\nimport EventTarget from '../events/EventTarget.js';\nimport EventType from '../events/EventType.js';\nimport ImageState from '../ImageState.js';\nimport {shared as iconImageCache} from '../style/IconImageCache.js';\n\n/**\n * @constructor\n * @param {Image|HTMLCanvasElement} image Image.\n * @param {string|undefined} src Src.\n * @param {module:ol/size~Size} size Size.\n * @param {?string} crossOrigin Cross origin.\n * @param {module:ol/ImageState} imageState Image state.\n * @param {module:ol/color~Color} color Color.\n * @extends {module:ol/events/EventTarget}\n */\nconst IconImage = function(image, src, size, crossOrigin, imageState, color) {\n\n EventTarget.call(this);\n\n /**\n * @private\n * @type {Image|HTMLCanvasElement}\n */\n this.hitDetectionImage_ = null;\n\n /**\n * @private\n * @type {Image|HTMLCanvasElement}\n */\n this.image_ = !image ? new Image() : image;\n\n if (crossOrigin !== null) {\n this.image_.crossOrigin = crossOrigin;\n }\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = color ?\n /** @type {HTMLCanvasElement} */ (document.createElement('CANVAS')) :\n null;\n\n /**\n * @private\n * @type {module:ol/color~Color}\n */\n this.color_ = color;\n\n /**\n * @private\n * @type {Array.<module:ol/events~EventsKey>}\n */\n this.imageListenerKeys_ = null;\n\n /**\n * @private\n * @type {module:ol/ImageState}\n */\n this.imageState_ = imageState;\n\n /**\n * @private\n * @type {module:ol/size~Size}\n */\n this.size_ = size;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.src_ = src;\n\n /**\n * @private\n * @type {boolean}\n */\n this.tainting_ = false;\n if (this.imageState_ == ImageState.LOADED) {\n this.determineTainting_();\n }\n\n};\n\ninherits(IconImage, EventTarget);\n\n\n/**\n * @param {Image|HTMLCanvasElement} image Image.\n * @param {string} src Src.\n * @param {module:ol/size~Size} size Size.\n * @param {?string} crossOrigin Cross origin.\n * @param {module:ol/ImageState} imageState Image state.\n * @param {module:ol/color~Color} color Color.\n * @return {module:ol/style/IconImage} Icon image.\n */\nexport function get(image, src, size, crossOrigin, imageState, color) {\n let iconImage = iconImageCache.get(src, crossOrigin, color);\n if (!iconImage) {\n iconImage = new IconImage(image, src, size, crossOrigin, imageState, color);\n iconImageCache.set(src, crossOrigin, color, iconImage);\n }\n return iconImage;\n}\n\n\n/**\n * @private\n */\nIconImage.prototype.determineTainting_ = function() {\n const context = createCanvasContext2D(1, 1);\n try {\n context.drawImage(this.image_, 0, 0);\n context.getImageData(0, 0, 1, 1);\n } catch (e) {\n this.tainting_ = true;\n }\n};\n\n\n/**\n * @private\n */\nIconImage.prototype.dispatchChangeEvent_ = function() {\n this.dispatchEvent(EventType.CHANGE);\n};\n\n\n/**\n * @private\n */\nIconImage.prototype.handleImageError_ = function() {\n this.imageState_ = ImageState.ERROR;\n this.unlistenImage_();\n this.dispatchChangeEvent_();\n};\n\n\n/**\n * @private\n */\nIconImage.prototype.handleImageLoad_ = function() {\n this.imageState_ = ImageState.LOADED;\n if (this.size_) {\n this.image_.width = this.size_[0];\n this.image_.height = this.size_[1];\n }\n this.size_ = [this.image_.width, this.image_.height];\n this.unlistenImage_();\n this.determineTainting_();\n this.replaceColor_();\n this.dispatchChangeEvent_();\n};\n\n\n/**\n * @param {number} pixelRatio Pixel ratio.\n * @return {Image|HTMLCanvasElement} Image or Canvas element.\n */\nIconImage.prototype.getImage = function(pixelRatio) {\n return this.canvas_ ? this.canvas_ : this.image_;\n};\n\n\n/**\n * @return {module:ol/ImageState} Image state.\n */\nIconImage.prototype.getImageState = function() {\n return this.imageState_;\n};\n\n\n/**\n * @param {number} pixelRatio Pixel ratio.\n * @return {Image|HTMLCanvasElement} Image element.\n */\nIconImage.prototype.getHitDetectionImage = function(pixelRatio) {\n if (!this.hitDetectionImage_) {\n if (this.tainting_) {\n const width = this.size_[0];\n const height = this.size_[1];\n const context = createCanvasContext2D(width, height);\n context.fillRect(0, 0, width, height);\n this.hitDetectionImage_ = context.canvas;\n } else {\n this.hitDetectionImage_ = this.image_;\n }\n }\n return this.hitDetectionImage_;\n};\n\n\n/**\n * @return {module:ol/size~Size} Image size.\n */\nIconImage.prototype.getSize = function() {\n return this.size_;\n};\n\n\n/**\n * @return {string|undefined} Image src.\n */\nIconImage.prototype.getSrc = function() {\n return this.src_;\n};\n\n\n/**\n * Load not yet loaded URI.\n */\nIconImage.prototype.load = function() {\n if (this.imageState_ == ImageState.IDLE) {\n this.imageState_ = ImageState.LOADING;\n this.imageListenerKeys_ = [\n listenOnce(this.image_, EventType.ERROR,\n this.handleImageError_, this),\n listenOnce(this.image_, EventType.LOAD,\n this.handleImageLoad_, this)\n ];\n try {\n this.image_.src = this.src_;\n } catch (e) {\n this.handleImageError_();\n }\n }\n};\n\n\n/**\n * @private\n */\nIconImage.prototype.replaceColor_ = function() {\n if (this.tainting_ || this.color_ === null) {\n return;\n }\n\n this.canvas_.width = this.image_.width;\n this.canvas_.height = this.image_.height;\n\n const ctx = this.canvas_.getContext('2d');\n ctx.drawImage(this.image_, 0, 0);\n\n const imgData = ctx.getImageData(0, 0, this.image_.width, this.image_.height);\n const data = imgData.data;\n const r = this.color_[0] / 255.0;\n const g = this.color_[1] / 255.0;\n const b = this.color_[2] / 255.0;\n\n for (let i = 0, ii = data.length; i < ii; i += 4) {\n data[i] *= r;\n data[i + 1] *= g;\n data[i + 2] *= b;\n }\n ctx.putImageData(imgData, 0, 0);\n};\n\n\n/**\n * Discards event handlers which listen for load completion or errors.\n *\n * @private\n */\nIconImage.prototype.unlistenImage_ = function() {\n this.imageListenerKeys_.forEach(unlistenByKey);\n this.imageListenerKeys_ = null;\n};\nexport default IconImage;\n","/**\n * @module ol/format/KML\n */\nimport {inherits} from '../util.js';\nimport Feature from '../Feature.js';\nimport {extend, includes} from '../array.js';\nimport {assert} from '../asserts.js';\nimport {asArray} from '../color.js';\nimport {transformWithOptions} from '../format/Feature.js';\nimport XMLFeature from '../format/XMLFeature.js';\nimport {readDecimal, readBoolean, readString, writeStringTextNode, writeCDATASection, writeDecimalTextNode, writeBooleanTextNode} from '../format/xsd.js';\nimport GeometryCollection from '../geom/GeometryCollection.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {toRadians} from '../math.js';\nimport {get as getProjection} from '../proj.js';\nimport Fill from '../style/Fill.js';\nimport Icon from '../style/Icon.js';\nimport IconAnchorUnits from '../style/IconAnchorUnits.js';\nimport IconOrigin from '../style/IconOrigin.js';\nimport Stroke from '../style/Stroke.js';\nimport Style from '../style/Style.js';\nimport Text from '../style/Text.js';\nimport {createElementNS, getAllTextContent, isDocument, isNode, makeArrayExtender,\n makeArrayPusher, makeChildAppender, makeObjectPropertySetter,\n makeReplacer, makeSequence, makeSimpleNodeFactory, makeStructureNS,\n OBJECT_PROPERTY_NODE_FACTORY, parse, parseNode, pushParseAndPop,\n pushSerializeAndPop, XML_SCHEMA_INSTANCE_URI} from '../xml.js';\n\n/**\n * @typedef {Object} Vec2\n * @property {number} x\n * @property {module:ol/style/IconAnchorUnits} xunits\n * @property {number} y\n * @property {module:ol/style/IconAnchorUnits} yunits\n * @property {module:ol/style/IconOrigin} origin\n */\n\n/**\n * @typedef {Object} GxTrackObject\n * @property {Array.<number>} flatCoordinates\n * @property {Array.<number>} whens\n */\n\n/**\n * @type {module:ol/color~Color}\n */\nlet DEFAULT_COLOR;\n\n/**\n * @type {module:ol/style/Fill}\n */\nlet DEFAULT_FILL_STYLE = null;\n\n/**\n * Get the default fill style (or null if not yet set).\n * @return {module:ol/style/Fill} The default fill style.\n */\nexport function getDefaultFillStyle() {\n return DEFAULT_FILL_STYLE;\n}\n\n/**\n * @type {module:ol/size~Size}\n */\nlet DEFAULT_IMAGE_STYLE_ANCHOR;\n\n/**\n * @type {module:ol/style/IconAnchorUnits}\n */\nlet DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS;\n\n/**\n * @type {module:ol/style/IconAnchorUnits}\n */\nlet DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS;\n\n/**\n * @type {module:ol/size~Size}\n */\nlet DEFAULT_IMAGE_STYLE_SIZE;\n\n/**\n * @type {string}\n */\nlet DEFAULT_IMAGE_STYLE_SRC;\n\n/**\n * @type {number}\n */\nlet DEFAULT_IMAGE_SCALE_MULTIPLIER;\n\n/**\n * @type {module:ol/style/Image}\n */\nlet DEFAULT_IMAGE_STYLE = null;\n\n/**\n * Get the default image style (or null if not yet set).\n * @return {module:ol/style/Image} The default image style.\n */\nexport function getDefaultImageStyle() {\n return DEFAULT_IMAGE_STYLE;\n}\n\n/**\n * @type {string}\n */\nlet DEFAULT_NO_IMAGE_STYLE;\n\n/**\n * @type {module:ol/style/Stroke}\n */\nlet DEFAULT_STROKE_STYLE = null;\n\n/**\n * Get the default stroke style (or null if not yet set).\n * @return {module:ol/style/Stroke} The default stroke style.\n */\nexport function getDefaultStrokeStyle() {\n return DEFAULT_STROKE_STYLE;\n}\n\n/**\n * @type {module:ol/style/Stroke}\n */\nlet DEFAULT_TEXT_STROKE_STYLE;\n\n/**\n * @type {module:ol/style/Text}\n */\nlet DEFAULT_TEXT_STYLE = null;\n\n/**\n * Get the default text style (or null if not yet set).\n * @return {module:ol/style/Text} The default text style.\n */\nexport function getDefaultTextStyle() {\n return DEFAULT_TEXT_STYLE;\n}\n\n/**\n * @type {module:ol/style/Style}\n */\nlet DEFAULT_STYLE = null;\n\n/**\n * Get the default style (or null if not yet set).\n * @return {module:ol/style/Style} The default style.\n */\nexport function getDefaultStyle() {\n return DEFAULT_STYLE;\n}\n\n/**\n * @type {Array.<module:ol/style/Style>}\n */\nlet DEFAULT_STYLE_ARRAY = null;\n\n/**\n * Get the default style array (or null if not yet set).\n * @return {Array.<module:ol/style/Style>} The default style.\n */\nexport function getDefaultStyleArray() {\n return DEFAULT_STYLE_ARRAY;\n}\n\n\nfunction createStyleDefaults() {\n\n DEFAULT_COLOR = [255, 255, 255, 1];\n\n DEFAULT_FILL_STYLE = new Fill({\n color: DEFAULT_COLOR\n });\n\n DEFAULT_IMAGE_STYLE_ANCHOR = [20, 2]; // FIXME maybe [8, 32] ?\n\n DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS = IconAnchorUnits.PIXELS;\n\n DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS = IconAnchorUnits.PIXELS;\n\n DEFAULT_IMAGE_STYLE_SIZE = [64, 64];\n\n DEFAULT_IMAGE_STYLE_SRC =\n 'https://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png';\n\n DEFAULT_IMAGE_SCALE_MULTIPLIER = 0.5;\n\n DEFAULT_IMAGE_STYLE = new Icon({\n anchor: DEFAULT_IMAGE_STYLE_ANCHOR,\n anchorOrigin: IconOrigin.BOTTOM_LEFT,\n anchorXUnits: DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS,\n anchorYUnits: DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS,\n crossOrigin: 'anonymous',\n rotation: 0,\n scale: DEFAULT_IMAGE_SCALE_MULTIPLIER,\n size: DEFAULT_IMAGE_STYLE_SIZE,\n src: DEFAULT_IMAGE_STYLE_SRC\n });\n\n DEFAULT_NO_IMAGE_STYLE = 'NO_IMAGE';\n\n DEFAULT_STROKE_STYLE = new Stroke({\n color: DEFAULT_COLOR,\n width: 1\n });\n\n DEFAULT_TEXT_STROKE_STYLE = new Stroke({\n color: [51, 51, 51, 1],\n width: 2\n });\n\n DEFAULT_TEXT_STYLE = new Text({\n font: 'bold 16px Helvetica',\n fill: DEFAULT_FILL_STYLE,\n stroke: DEFAULT_TEXT_STROKE_STYLE,\n scale: 0.8\n });\n\n DEFAULT_STYLE = new Style({\n fill: DEFAULT_FILL_STYLE,\n image: DEFAULT_IMAGE_STYLE,\n text: DEFAULT_TEXT_STYLE,\n stroke: DEFAULT_STROKE_STYLE,\n zIndex: 0\n });\n\n DEFAULT_STYLE_ARRAY = [DEFAULT_STYLE];\n\n}\n\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [extractStyles=true] Extract styles from the KML.\n * @property {boolean} [showPointNames=true] Show names as labels for placemarks which contain points.\n * @property {Array.<module:ol/style/Style>} [defaultStyle] Default style. The\n * default default style is the same as Google Earth.\n * @property {boolean} [writeStyles=true] Write styles into KML.\n */\n\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the KML format.\n *\n * Note that the KML format uses the URL() constructor. Older browsers such as IE\n * which do not support this will need a URL polyfill to be loaded before use.\n *\n * @constructor\n * @extends {module:ol/format/XMLFeature}\n * @param {module:ol/format/KML~Options=} opt_options Options.\n * @api\n */\nconst KML = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n XMLFeature.call(this);\n\n if (!DEFAULT_STYLE_ARRAY) {\n createStyleDefaults();\n }\n\n /**\n * @inheritDoc\n */\n this.dataProjection = getProjection('EPSG:4326');\n\n /**\n * @private\n * @type {Array.<module:ol/style/Style>}\n */\n this.defaultStyle_ = options.defaultStyle ?\n options.defaultStyle : DEFAULT_STYLE_ARRAY;\n\n /**\n * @private\n * @type {boolean}\n */\n this.extractStyles_ = options.extractStyles !== undefined ?\n options.extractStyles : true;\n\n /**\n * @private\n * @type {boolean}\n */\n this.writeStyles_ = options.writeStyles !== undefined ?\n options.writeStyles : true;\n\n /**\n * @private\n * @type {!Object.<string, (Array.<module:ol/style/Style>|string)>}\n */\n this.sharedStyles_ = {};\n\n /**\n * @private\n * @type {boolean}\n */\n this.showPointNames_ = options.showPointNames !== undefined ?\n options.showPointNames : true;\n\n};\n\ninherits(KML, XMLFeature);\n\n\n/**\n * @const\n * @type {Array.<string>}\n */\nconst GX_NAMESPACE_URIS = [\n 'http://www.google.com/kml/ext/2.2'\n];\n\n\n/**\n * @const\n * @type {Array.<null|string>}\n */\nconst NAMESPACE_URIS = [\n null,\n 'http://earth.google.com/kml/2.0',\n 'http://earth.google.com/kml/2.1',\n 'http://earth.google.com/kml/2.2',\n 'http://www.opengis.net/kml/2.2'\n];\n\n\n/**\n * @const\n * @type {string}\n */\nconst SCHEMA_LOCATION = 'http://www.opengis.net/kml/2.2 ' +\n 'https://developers.google.com/kml/schema/kml22gx.xsd';\n\n\n/**\n * @type {Object.<string, module:ol/style/IconAnchorUnits>}\n */\nconst ICON_ANCHOR_UNITS_MAP = {\n 'fraction': IconAnchorUnits.FRACTION,\n 'pixels': IconAnchorUnits.PIXELS,\n 'insetPixels': IconAnchorUnits.PIXELS\n};\n\n\n/**\n * @param {module:ol/style/Style|undefined} foundStyle Style.\n * @param {string} name Name.\n * @return {module:ol/style/Style} style Style.\n */\nfunction createNameStyleFunction(foundStyle, name) {\n let textStyle = null;\n const textOffset = [0, 0];\n let textAlign = 'start';\n if (foundStyle.getImage()) {\n let imageSize = foundStyle.getImage().getImageSize();\n if (imageSize === null) {\n imageSize = DEFAULT_IMAGE_STYLE_SIZE;\n }\n if (imageSize.length == 2) {\n const imageScale = foundStyle.getImage().getScale();\n // Offset the label to be centered to the right of the icon, if there is\n // one.\n textOffset[0] = imageScale * imageSize[0] / 2;\n textOffset[1] = -imageScale * imageSize[1] / 2;\n textAlign = 'left';\n }\n }\n if (foundStyle.getText() !== null) {\n // clone the text style, customizing it with name, alignments and offset.\n // Note that kml does not support many text options that OpenLayers does (rotation, textBaseline).\n const foundText = foundStyle.getText();\n textStyle = foundText.clone();\n textStyle.setFont(foundText.getFont() || DEFAULT_TEXT_STYLE.getFont());\n textStyle.setScale(foundText.getScale() || DEFAULT_TEXT_STYLE.getScale());\n textStyle.setFill(foundText.getFill() || DEFAULT_TEXT_STYLE.getFill());\n textStyle.setStroke(foundText.getStroke() || DEFAULT_TEXT_STROKE_STYLE);\n } else {\n textStyle = DEFAULT_TEXT_STYLE.clone();\n }\n textStyle.setText(name);\n textStyle.setOffsetX(textOffset[0]);\n textStyle.setOffsetY(textOffset[1]);\n textStyle.setTextAlign(textAlign);\n\n const nameStyle = new Style({\n text: textStyle\n });\n return nameStyle;\n}\n\n\n/**\n * @param {Array.<module:ol/style/Style>|undefined} style Style.\n * @param {string} styleUrl Style URL.\n * @param {Array.<module:ol/style/Style>} defaultStyle Default style.\n * @param {!Object.<string, (Array.<module:ol/style/Style>|string)>} sharedStyles Shared styles.\n * @param {boolean|undefined} showPointNames true to show names for point placemarks.\n * @return {module:ol/style/Style~StyleFunction} Feature style function.\n */\nfunction createFeatureStyleFunction(style, styleUrl, defaultStyle, sharedStyles, showPointNames) {\n\n return (\n /**\n * @param {module:ol/Feature} feature feature.\n * @param {number} resolution Resolution.\n * @return {Array.<module:ol/style/Style>} Style.\n */\n function(feature, resolution) {\n let drawName = showPointNames;\n /** @type {module:ol/style/Style|undefined} */\n let nameStyle;\n let name = '';\n if (drawName) {\n const geometry = feature.getGeometry();\n if (geometry) {\n drawName = geometry.getType() === GeometryType.POINT;\n }\n }\n\n if (drawName) {\n name = /** @type {string} */ (feature.get('name'));\n drawName = drawName && name;\n }\n\n if (style) {\n if (drawName) {\n nameStyle = createNameStyleFunction(style[0], name);\n return style.concat(nameStyle);\n }\n return style;\n }\n if (styleUrl) {\n const foundStyle = findStyle(styleUrl, defaultStyle, sharedStyles);\n if (drawName) {\n nameStyle = createNameStyleFunction(foundStyle[0], name);\n return foundStyle.concat(nameStyle);\n }\n return foundStyle;\n }\n if (drawName) {\n nameStyle = createNameStyleFunction(defaultStyle[0], name);\n return defaultStyle.concat(nameStyle);\n }\n return defaultStyle;\n }\n );\n}\n\n\n/**\n * @param {Array.<module:ol/style/Style>|string|undefined} styleValue Style value.\n * @param {Array.<module:ol/style/Style>} defaultStyle Default style.\n * @param {!Object.<string, (Array.<module:ol/style/Style>|string)>} sharedStyles\n * Shared styles.\n * @return {Array.<module:ol/style/Style>} Style.\n */\nfunction findStyle(styleValue, defaultStyle, sharedStyles) {\n if (Array.isArray(styleValue)) {\n return styleValue;\n } else if (typeof styleValue === 'string') {\n // KML files in the wild occasionally forget the leading `#` on styleUrls\n // defined in the same document. Add a leading `#` if it enables to find\n // a style.\n if (!(styleValue in sharedStyles) && ('#' + styleValue in sharedStyles)) {\n styleValue = '#' + styleValue;\n }\n return findStyle(sharedStyles[styleValue], defaultStyle, sharedStyles);\n } else {\n return defaultStyle;\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @return {module:ol/color~Color|undefined} Color.\n */\nfunction readColor(node) {\n const s = getAllTextContent(node, false);\n // The KML specification states that colors should not include a leading `#`\n // but we tolerate them.\n const m = /^\\s*#?\\s*([0-9A-Fa-f]{8})\\s*$/.exec(s);\n if (m) {\n const hexColor = m[1];\n return [\n parseInt(hexColor.substr(6, 2), 16),\n parseInt(hexColor.substr(4, 2), 16),\n parseInt(hexColor.substr(2, 2), 16),\n parseInt(hexColor.substr(0, 2), 16) / 255\n ];\n\n } else {\n return undefined;\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @return {Array.<number>|undefined} Flat coordinates.\n */\nexport function readFlatCoordinates(node) {\n let s = getAllTextContent(node, false);\n const flatCoordinates = [];\n // The KML specification states that coordinate tuples should not include\n // spaces, but we tolerate them.\n const re =\n /^\\s*([+\\-]?\\d*\\.?\\d+(?:e[+\\-]?\\d+)?)\\s*,\\s*([+\\-]?\\d*\\.?\\d+(?:e[+\\-]?\\d+)?)(?:\\s*,\\s*([+\\-]?\\d*\\.?\\d+(?:e[+\\-]?\\d+)?))?\\s*/i;\n let m;\n while ((m = re.exec(s))) {\n const x = parseFloat(m[1]);\n const y = parseFloat(m[2]);\n const z = m[3] ? parseFloat(m[3]) : 0;\n flatCoordinates.push(x, y, z);\n s = s.substr(m[0].length);\n }\n if (s !== '') {\n return undefined;\n }\n return flatCoordinates;\n}\n\n\n/**\n * @param {Node} node Node.\n * @return {string} URI.\n */\nfunction readURI(node) {\n const s = getAllTextContent(node, false).trim();\n let baseURI = node.baseURI;\n if (!baseURI || baseURI == 'about:blank') {\n baseURI = window.location.href;\n }\n if (baseURI) {\n const url = new URL(s, baseURI);\n return url.href;\n } else {\n return s;\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @return {module:ol/format/KML~Vec2} Vec2.\n */\nfunction readVec2(node) {\n const xunits = node.getAttribute('xunits');\n const yunits = node.getAttribute('yunits');\n let origin;\n if (xunits !== 'insetPixels') {\n if (yunits !== 'insetPixels') {\n origin = IconOrigin.BOTTOM_LEFT;\n } else {\n origin = IconOrigin.TOP_LEFT;\n }\n } else {\n if (yunits !== 'insetPixels') {\n origin = IconOrigin.BOTTOM_RIGHT;\n } else {\n origin = IconOrigin.TOP_RIGHT;\n }\n }\n return {\n x: parseFloat(node.getAttribute('x')),\n xunits: ICON_ANCHOR_UNITS_MAP[xunits],\n y: parseFloat(node.getAttribute('y')),\n yunits: ICON_ANCHOR_UNITS_MAP[yunits],\n origin: origin\n };\n}\n\n\n/**\n * @param {Node} node Node.\n * @return {number|undefined} Scale.\n */\nfunction readScale(node) {\n return readDecimal(node);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst STYLE_MAP_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Pair': pairDataParser\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Array.<module:ol/style/Style>|string|undefined} StyleMap.\n */\nfunction readStyleMapValue(node, objectStack) {\n return pushParseAndPop(undefined,\n STYLE_MAP_PARSERS, node, objectStack);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst ICON_STYLE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Icon': makeObjectPropertySetter(readIcon),\n 'heading': makeObjectPropertySetter(readDecimal),\n 'hotSpot': makeObjectPropertySetter(readVec2),\n 'scale': makeObjectPropertySetter(readScale)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction iconStyleParser(node, objectStack) {\n // FIXME refreshMode\n // FIXME refreshInterval\n // FIXME viewRefreshTime\n // FIXME viewBoundScale\n // FIXME viewFormat\n // FIXME httpQuery\n const object = pushParseAndPop(\n {}, ICON_STYLE_PARSERS, node, objectStack);\n if (!object) {\n return;\n }\n const styleObject = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n const IconObject = 'Icon' in object ? object['Icon'] : {};\n const drawIcon = (!('Icon' in object) || Object.keys(IconObject).length > 0);\n let src;\n const href = /** @type {string|undefined} */\n (IconObject['href']);\n if (href) {\n src = href;\n } else if (drawIcon) {\n src = DEFAULT_IMAGE_STYLE_SRC;\n }\n let anchor, anchorXUnits, anchorYUnits;\n let anchorOrigin = IconOrigin.BOTTOM_LEFT;\n const hotSpot = /** @type {module:ol/format/KML~Vec2|undefined} */\n (object['hotSpot']);\n if (hotSpot) {\n anchor = [hotSpot.x, hotSpot.y];\n anchorXUnits = hotSpot.xunits;\n anchorYUnits = hotSpot.yunits;\n anchorOrigin = hotSpot.origin;\n } else if (src === DEFAULT_IMAGE_STYLE_SRC) {\n anchor = DEFAULT_IMAGE_STYLE_ANCHOR;\n anchorXUnits = DEFAULT_IMAGE_STYLE_ANCHOR_X_UNITS;\n anchorYUnits = DEFAULT_IMAGE_STYLE_ANCHOR_Y_UNITS;\n } else if (/^http:\\/\\/maps\\.(?:google|gstatic)\\.com\\//.test(src)) {\n anchor = [0.5, 0];\n anchorXUnits = IconAnchorUnits.FRACTION;\n anchorYUnits = IconAnchorUnits.FRACTION;\n }\n\n let offset;\n const x = /** @type {number|undefined} */\n (IconObject['x']);\n const y = /** @type {number|undefined} */\n (IconObject['y']);\n if (x !== undefined && y !== undefined) {\n offset = [x, y];\n }\n\n let size;\n const w = /** @type {number|undefined} */\n (IconObject['w']);\n const h = /** @type {number|undefined} */\n (IconObject['h']);\n if (w !== undefined && h !== undefined) {\n size = [w, h];\n }\n\n let rotation;\n const heading = /** @type {number} */\n (object['heading']);\n if (heading !== undefined) {\n rotation = toRadians(heading);\n }\n\n let scale = /** @type {number|undefined} */\n (object['scale']);\n\n if (drawIcon) {\n if (src == DEFAULT_IMAGE_STYLE_SRC) {\n size = DEFAULT_IMAGE_STYLE_SIZE;\n if (scale === undefined) {\n scale = DEFAULT_IMAGE_SCALE_MULTIPLIER;\n }\n }\n\n const imageStyle = new Icon({\n anchor: anchor,\n anchorOrigin: anchorOrigin,\n anchorXUnits: anchorXUnits,\n anchorYUnits: anchorYUnits,\n crossOrigin: 'anonymous', // FIXME should this be configurable?\n offset: offset,\n offsetOrigin: IconOrigin.BOTTOM_LEFT,\n rotation: rotation,\n scale: scale,\n size: size,\n src: src\n });\n styleObject['imageStyle'] = imageStyle;\n } else {\n // handle the case when we explicitly want to draw no icon.\n styleObject['imageStyle'] = DEFAULT_NO_IMAGE_STYLE;\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst LABEL_STYLE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'color': makeObjectPropertySetter(readColor),\n 'scale': makeObjectPropertySetter(readScale)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction labelStyleParser(node, objectStack) {\n // FIXME colorMode\n const object = pushParseAndPop(\n {}, LABEL_STYLE_PARSERS, node, objectStack);\n if (!object) {\n return;\n }\n const styleObject = objectStack[objectStack.length - 1];\n const textStyle = new Text({\n fill: new Fill({\n color: /** @type {module:ol/color~Color} */\n ('color' in object ? object['color'] : DEFAULT_COLOR)\n }),\n scale: /** @type {number|undefined} */\n (object['scale'])\n });\n styleObject['textStyle'] = textStyle;\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst LINE_STYLE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'color': makeObjectPropertySetter(readColor),\n 'width': makeObjectPropertySetter(readDecimal)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction lineStyleParser(node, objectStack) {\n // FIXME colorMode\n // FIXME gx:outerColor\n // FIXME gx:outerWidth\n // FIXME gx:physicalWidth\n // FIXME gx:labelVisibility\n const object = pushParseAndPop(\n {}, LINE_STYLE_PARSERS, node, objectStack);\n if (!object) {\n return;\n }\n const styleObject = objectStack[objectStack.length - 1];\n const strokeStyle = new Stroke({\n color: /** @type {module:ol/color~Color} */\n ('color' in object ? object['color'] : DEFAULT_COLOR),\n width: /** @type {number} */ ('width' in object ? object['width'] : 1)\n });\n styleObject['strokeStyle'] = strokeStyle;\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst POLY_STYLE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'color': makeObjectPropertySetter(readColor),\n 'fill': makeObjectPropertySetter(readBoolean),\n 'outline': makeObjectPropertySetter(readBoolean)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction polyStyleParser(node, objectStack) {\n // FIXME colorMode\n const object = pushParseAndPop(\n {}, POLY_STYLE_PARSERS, node, objectStack);\n if (!object) {\n return;\n }\n const styleObject = objectStack[objectStack.length - 1];\n const fillStyle = new Fill({\n color: /** @type {module:ol/color~Color} */\n ('color' in object ? object['color'] : DEFAULT_COLOR)\n });\n styleObject['fillStyle'] = fillStyle;\n const fill = /** @type {boolean|undefined} */ (object['fill']);\n if (fill !== undefined) {\n styleObject['fill'] = fill;\n }\n const outline = /** @type {boolean|undefined} */ (object['outline']);\n if (outline !== undefined) {\n styleObject['outline'] = outline;\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst FLAT_LINEAR_RING_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'coordinates': makeReplacer(readFlatCoordinates)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Array.<number>} LinearRing flat coordinates.\n */\nfunction readFlatLinearRing(node, objectStack) {\n return pushParseAndPop(null,\n FLAT_LINEAR_RING_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction gxCoordParser(node, objectStack) {\n const gxTrackObject = /** @type {module:ol/format/KML~GxTrackObject} */\n (objectStack[objectStack.length - 1]);\n const flatCoordinates = gxTrackObject.flatCoordinates;\n const s = getAllTextContent(node, false);\n const re =\n /^\\s*([+\\-]?\\d+(?:\\.\\d*)?(?:e[+\\-]?\\d*)?)\\s+([+\\-]?\\d+(?:\\.\\d*)?(?:e[+\\-]?\\d*)?)\\s+([+\\-]?\\d+(?:\\.\\d*)?(?:e[+\\-]?\\d*)?)\\s*$/i;\n const m = re.exec(s);\n if (m) {\n const x = parseFloat(m[1]);\n const y = parseFloat(m[2]);\n const z = parseFloat(m[3]);\n flatCoordinates.push(x, y, z, 0);\n } else {\n flatCoordinates.push(0, 0, 0, 0);\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst GX_MULTITRACK_GEOMETRY_PARSERS = makeStructureNS(\n GX_NAMESPACE_URIS, {\n 'Track': makeArrayPusher(readGxTrack)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/MultiLineString|undefined} MultiLineString.\n */\nfunction readGxMultiTrack(node, objectStack) {\n const lineStrings = pushParseAndPop([],\n GX_MULTITRACK_GEOMETRY_PARSERS, node, objectStack);\n if (!lineStrings) {\n return undefined;\n }\n const multiLineString = new MultiLineString(null);\n multiLineString.setLineStrings(lineStrings);\n return multiLineString;\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst GX_TRACK_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'when': whenParser\n }, makeStructureNS(\n GX_NAMESPACE_URIS, {\n 'coord': gxCoordParser\n }));\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/LineString|undefined} LineString.\n */\nfunction readGxTrack(node, objectStack) {\n const gxTrackObject = pushParseAndPop(\n /** @type {module:ol/format/KML~GxTrackObject} */ ({\n flatCoordinates: [],\n whens: []\n }), GX_TRACK_PARSERS, node, objectStack);\n if (!gxTrackObject) {\n return undefined;\n }\n const flatCoordinates = gxTrackObject.flatCoordinates;\n const whens = gxTrackObject.whens;\n for (let i = 0, ii = Math.min(flatCoordinates.length, whens.length); i < ii; ++i) {\n flatCoordinates[4 * i + 3] = whens[i];\n }\n const lineString = new LineString(null);\n lineString.setFlatCoordinates(GeometryLayout.XYZM, flatCoordinates);\n return lineString;\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst ICON_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'href': makeObjectPropertySetter(readURI)\n }, makeStructureNS(\n GX_NAMESPACE_URIS, {\n 'x': makeObjectPropertySetter(readDecimal),\n 'y': makeObjectPropertySetter(readDecimal),\n 'w': makeObjectPropertySetter(readDecimal),\n 'h': makeObjectPropertySetter(readDecimal)\n }));\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object} Icon object.\n */\nfunction readIcon(node, objectStack) {\n const iconObject = pushParseAndPop(\n {}, ICON_PARSERS, node, objectStack);\n if (iconObject) {\n return iconObject;\n } else {\n return null;\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst GEOMETRY_FLAT_COORDINATES_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'coordinates': makeReplacer(readFlatCoordinates)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Array.<number>} Flat coordinates.\n */\nfunction readFlatCoordinatesFromNode(node, objectStack) {\n return pushParseAndPop(null,\n GEOMETRY_FLAT_COORDINATES_PARSERS, node, objectStack);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst EXTRUDE_AND_ALTITUDE_MODE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'extrude': makeObjectPropertySetter(readBoolean),\n 'tessellate': makeObjectPropertySetter(readBoolean),\n 'altitudeMode': makeObjectPropertySetter(readString)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/LineString|undefined} LineString.\n */\nfunction readLineString(node, objectStack) {\n const properties = pushParseAndPop({},\n EXTRUDE_AND_ALTITUDE_MODE_PARSERS, node,\n objectStack);\n const flatCoordinates =\n readFlatCoordinatesFromNode(node, objectStack);\n if (flatCoordinates) {\n const lineString = new LineString(null);\n lineString.setFlatCoordinates(GeometryLayout.XYZ, flatCoordinates);\n lineString.setProperties(properties);\n return lineString;\n } else {\n return undefined;\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/Polygon|undefined} Polygon.\n */\nfunction readLinearRing(node, objectStack) {\n const properties = pushParseAndPop({},\n EXTRUDE_AND_ALTITUDE_MODE_PARSERS, node,\n objectStack);\n const flatCoordinates =\n readFlatCoordinatesFromNode(node, objectStack);\n if (flatCoordinates) {\n const polygon = new Polygon(null);\n polygon.setFlatCoordinates(GeometryLayout.XYZ, flatCoordinates,\n [flatCoordinates.length]);\n polygon.setProperties(properties);\n return polygon;\n } else {\n return undefined;\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst MULTI_GEOMETRY_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'LineString': makeArrayPusher(readLineString),\n 'LinearRing': makeArrayPusher(readLinearRing),\n 'MultiGeometry': makeArrayPusher(readMultiGeometry),\n 'Point': makeArrayPusher(readPoint),\n 'Polygon': makeArrayPusher(readPolygon)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/Geometry} Geometry.\n */\nfunction readMultiGeometry(node, objectStack) {\n const geometries = pushParseAndPop([],\n MULTI_GEOMETRY_PARSERS, node, objectStack);\n if (!geometries) {\n return null;\n }\n if (geometries.length === 0) {\n return new GeometryCollection(geometries);\n }\n /** @type {module:ol/geom/Geometry} */\n let multiGeometry;\n let homogeneous = true;\n const type = geometries[0].getType();\n let geometry;\n for (let i = 1, ii = geometries.length; i < ii; ++i) {\n geometry = geometries[i];\n if (geometry.getType() != type) {\n homogeneous = false;\n break;\n }\n }\n if (homogeneous) {\n let layout;\n let flatCoordinates;\n if (type == GeometryType.POINT) {\n const point = geometries[0];\n layout = point.getLayout();\n flatCoordinates = point.getFlatCoordinates();\n for (let i = 1, ii = geometries.length; i < ii; ++i) {\n geometry = geometries[i];\n extend(flatCoordinates, geometry.getFlatCoordinates());\n }\n multiGeometry = new MultiPoint(null);\n multiGeometry.setFlatCoordinates(layout, flatCoordinates);\n setCommonGeometryProperties(multiGeometry, geometries);\n } else if (type == GeometryType.LINE_STRING) {\n multiGeometry = new MultiLineString(null);\n multiGeometry.setLineStrings(geometries);\n setCommonGeometryProperties(multiGeometry, geometries);\n } else if (type == GeometryType.POLYGON) {\n multiGeometry = new MultiPolygon(null);\n multiGeometry.setPolygons(geometries);\n setCommonGeometryProperties(multiGeometry, geometries);\n } else if (type == GeometryType.GEOMETRY_COLLECTION) {\n multiGeometry = new GeometryCollection(geometries);\n } else {\n assert(false, 37); // Unknown geometry type found\n }\n } else {\n multiGeometry = new GeometryCollection(geometries);\n }\n return (\n /** @type {module:ol/geom/Geometry} */ (multiGeometry)\n );\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/Point|undefined} Point.\n */\nfunction readPoint(node, objectStack) {\n const properties = pushParseAndPop({},\n EXTRUDE_AND_ALTITUDE_MODE_PARSERS, node,\n objectStack);\n const flatCoordinates =\n readFlatCoordinatesFromNode(node, objectStack);\n if (flatCoordinates) {\n const point = new Point(null);\n point.setFlatCoordinates(GeometryLayout.XYZ, flatCoordinates);\n point.setProperties(properties);\n return point;\n } else {\n return undefined;\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst FLAT_LINEAR_RINGS_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'innerBoundaryIs': innerBoundaryIsParser,\n 'outerBoundaryIs': outerBoundaryIsParser\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/geom/Polygon|undefined} Polygon.\n */\nfunction readPolygon(node, objectStack) {\n const properties = pushParseAndPop(/** @type {Object<string,*>} */ ({}),\n EXTRUDE_AND_ALTITUDE_MODE_PARSERS, node,\n objectStack);\n const flatLinearRings = pushParseAndPop([null],\n FLAT_LINEAR_RINGS_PARSERS, node, objectStack);\n if (flatLinearRings && flatLinearRings[0]) {\n const polygon = new Polygon(null);\n const flatCoordinates = flatLinearRings[0];\n const ends = [flatCoordinates.length];\n for (let i = 1, ii = flatLinearRings.length; i < ii; ++i) {\n extend(flatCoordinates, flatLinearRings[i]);\n ends.push(flatCoordinates.length);\n }\n polygon.setFlatCoordinates(GeometryLayout.XYZ, flatCoordinates, ends);\n polygon.setProperties(properties);\n return polygon;\n } else {\n return undefined;\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst STYLE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'IconStyle': iconStyleParser,\n 'LabelStyle': labelStyleParser,\n 'LineStyle': lineStyleParser,\n 'PolyStyle': polyStyleParser\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Array.<module:ol/style/Style>} Style.\n */\nfunction readStyle(node, objectStack) {\n const styleObject = pushParseAndPop(\n {}, STYLE_PARSERS, node, objectStack);\n if (!styleObject) {\n return null;\n }\n let fillStyle = /** @type {module:ol/style/Fill} */\n ('fillStyle' in styleObject ?\n styleObject['fillStyle'] : DEFAULT_FILL_STYLE);\n const fill = /** @type {boolean|undefined} */ (styleObject['fill']);\n if (fill !== undefined && !fill) {\n fillStyle = null;\n }\n let imageStyle = /** @type {module:ol/style/Image} */\n ('imageStyle' in styleObject ?\n styleObject['imageStyle'] : DEFAULT_IMAGE_STYLE);\n if (imageStyle == DEFAULT_NO_IMAGE_STYLE) {\n imageStyle = undefined;\n }\n const textStyle = /** @type {module:ol/style/Text} */\n ('textStyle' in styleObject ?\n styleObject['textStyle'] : DEFAULT_TEXT_STYLE);\n let strokeStyle = /** @type {module:ol/style/Stroke} */\n ('strokeStyle' in styleObject ?\n styleObject['strokeStyle'] : DEFAULT_STROKE_STYLE);\n const outline = /** @type {boolean|undefined} */\n (styleObject['outline']);\n if (outline !== undefined && !outline) {\n strokeStyle = null;\n }\n return [new Style({\n fill: fillStyle,\n image: imageStyle,\n stroke: strokeStyle,\n text: textStyle,\n zIndex: undefined // FIXME\n })];\n}\n\n\n/**\n * Reads an array of geometries and creates arrays for common geometry\n * properties. Then sets them to the multi geometry.\n * @param {module:ol/geom/MultiPoint|module:ol/geom/MultiLineString|module:ol/geom/MultiPolygon}\n * multiGeometry A multi-geometry.\n * @param {Array.<module:ol/geom/Geometry>} geometries List of geometries.\n */\nfunction setCommonGeometryProperties(multiGeometry, geometries) {\n const ii = geometries.length;\n const extrudes = new Array(geometries.length);\n const tessellates = new Array(geometries.length);\n const altitudeModes = new Array(geometries.length);\n let hasExtrude, hasTessellate, hasAltitudeMode;\n hasExtrude = hasTessellate = hasAltitudeMode = false;\n for (let i = 0; i < ii; ++i) {\n const geometry = geometries[i];\n extrudes[i] = geometry.get('extrude');\n tessellates[i] = geometry.get('tessellate');\n altitudeModes[i] = geometry.get('altitudeMode');\n hasExtrude = hasExtrude || extrudes[i] !== undefined;\n hasTessellate = hasTessellate || tessellates[i] !== undefined;\n hasAltitudeMode = hasAltitudeMode || altitudeModes[i];\n }\n if (hasExtrude) {\n multiGeometry.set('extrude', extrudes);\n }\n if (hasTessellate) {\n multiGeometry.set('tessellate', tessellates);\n }\n if (hasAltitudeMode) {\n multiGeometry.set('altitudeMode', altitudeModes);\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst DATA_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'displayName': makeObjectPropertySetter(readString),\n 'value': makeObjectPropertySetter(readString)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction dataParser(node, objectStack) {\n const name = node.getAttribute('name');\n parseNode(DATA_PARSERS, node, objectStack);\n const featureObject = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n if (name !== null) {\n featureObject[name] = featureObject.value;\n } else if (featureObject.displayName !== null) {\n featureObject[featureObject.displayName] = featureObject.value;\n }\n delete featureObject['value'];\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst EXTENDED_DATA_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Data': dataParser,\n 'SchemaData': schemaDataParser\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction extendedDataParser(node, objectStack) {\n parseNode(EXTENDED_DATA_PARSERS, node, objectStack);\n}\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst REGION_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'LatLonAltBox': latLonAltBoxParser,\n 'Lod': lodParser\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction regionParser(node, objectStack) {\n parseNode(REGION_PARSERS, node, objectStack);\n}\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst PAIR_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Style': makeObjectPropertySetter(readStyle),\n 'key': makeObjectPropertySetter(readString),\n 'styleUrl': makeObjectPropertySetter(readURI)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction pairDataParser(node, objectStack) {\n const pairObject = pushParseAndPop(\n {}, PAIR_PARSERS, node, objectStack);\n if (!pairObject) {\n return;\n }\n const key = /** @type {string|undefined} */\n (pairObject['key']);\n if (key && key == 'normal') {\n const styleUrl = /** @type {string|undefined} */\n (pairObject['styleUrl']);\n if (styleUrl) {\n objectStack[objectStack.length - 1] = styleUrl;\n }\n const Style = /** @type {module:ol/style/Style} */\n (pairObject['Style']);\n if (Style) {\n objectStack[objectStack.length - 1] = Style;\n }\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction placemarkStyleMapParser(node, objectStack) {\n const styleMapValue = readStyleMapValue(node, objectStack);\n if (!styleMapValue) {\n return;\n }\n const placemarkObject = objectStack[objectStack.length - 1];\n if (Array.isArray(styleMapValue)) {\n placemarkObject['Style'] = styleMapValue;\n } else if (typeof styleMapValue === 'string') {\n placemarkObject['styleUrl'] = styleMapValue;\n } else {\n assert(false, 38); // `styleMapValue` has an unknown type\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst SCHEMA_DATA_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'SimpleData': simpleDataParser\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction schemaDataParser(node, objectStack) {\n parseNode(SCHEMA_DATA_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction simpleDataParser(node, objectStack) {\n const name = node.getAttribute('name');\n if (name !== null) {\n const data = readString(node);\n const featureObject = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n featureObject[name] = data;\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst LAT_LON_ALT_BOX_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'altitudeMode': makeObjectPropertySetter(readString),\n 'minAltitude': makeObjectPropertySetter(readDecimal),\n 'maxAltitude': makeObjectPropertySetter(readDecimal),\n 'north': makeObjectPropertySetter(readDecimal),\n 'south': makeObjectPropertySetter(readDecimal),\n 'east': makeObjectPropertySetter(readDecimal),\n 'west': makeObjectPropertySetter(readDecimal)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction latLonAltBoxParser(node, objectStack) {\n const object = pushParseAndPop({}, LAT_LON_ALT_BOX_PARSERS, node, objectStack);\n if (!object) {\n return;\n }\n const regionObject = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n const extent = [\n parseFloat(object['west']),\n parseFloat(object['south']),\n parseFloat(object['east']),\n parseFloat(object['north'])\n ];\n regionObject['extent'] = extent;\n regionObject['altitudeMode'] = object['altitudeMode'];\n regionObject['minAltitude'] = parseFloat(object['minAltitude']);\n regionObject['maxAltitude'] = parseFloat(object['maxAltitude']);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst LOD_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'minLodPixels': makeObjectPropertySetter(readDecimal),\n 'maxLodPixels': makeObjectPropertySetter(readDecimal),\n 'minFadeExtent': makeObjectPropertySetter(readDecimal),\n 'maxFadeExtent': makeObjectPropertySetter(readDecimal)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction lodParser(node, objectStack) {\n const object = pushParseAndPop({}, LOD_PARSERS, node, objectStack);\n if (!object) {\n return;\n }\n const lodObject = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n lodObject['minLodPixels'] = parseFloat(object['minLodPixels']);\n lodObject['maxLodPixels'] = parseFloat(object['maxLodPixels']);\n lodObject['minFadeExtent'] = parseFloat(object['minFadeExtent']);\n lodObject['maxFadeExtent'] = parseFloat(object['maxFadeExtent']);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst INNER_BOUNDARY_IS_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'LinearRing': makeReplacer(readFlatLinearRing)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction innerBoundaryIsParser(node, objectStack) {\n /** @type {Array.<number>|undefined} */\n const flatLinearRing = pushParseAndPop(undefined,\n INNER_BOUNDARY_IS_PARSERS, node, objectStack);\n if (flatLinearRing) {\n const flatLinearRings = /** @type {Array.<Array.<number>>} */\n (objectStack[objectStack.length - 1]);\n flatLinearRings.push(flatLinearRing);\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst OUTER_BOUNDARY_IS_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'LinearRing': makeReplacer(readFlatLinearRing)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction outerBoundaryIsParser(node, objectStack) {\n /** @type {Array.<number>|undefined} */\n const flatLinearRing = pushParseAndPop(undefined,\n OUTER_BOUNDARY_IS_PARSERS, node, objectStack);\n if (flatLinearRing) {\n const flatLinearRings = /** @type {Array.<Array.<number>>} */\n (objectStack[objectStack.length - 1]);\n flatLinearRings[0] = flatLinearRing;\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst NETWORK_LINK_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'ExtendedData': extendedDataParser,\n 'Region': regionParser,\n 'Link': linkParser,\n 'address': makeObjectPropertySetter(readString),\n 'description': makeObjectPropertySetter(readString),\n 'name': makeObjectPropertySetter(readString),\n 'open': makeObjectPropertySetter(readBoolean),\n 'phoneNumber': makeObjectPropertySetter(readString),\n 'visibility': makeObjectPropertySetter(readBoolean)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst LINK_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'href': makeObjectPropertySetter(readURI)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction linkParser(node, objectStack) {\n parseNode(LINK_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction whenParser(node, objectStack) {\n const gxTrackObject = /** @type {module:ol/format/KML~GxTrackObject} */\n (objectStack[objectStack.length - 1]);\n const whens = gxTrackObject.whens;\n const s = getAllTextContent(node, false);\n const when = Date.parse(s);\n whens.push(isNaN(when) ? 0 : when);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst PLACEMARK_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'ExtendedData': extendedDataParser,\n 'Region': regionParser,\n 'MultiGeometry': makeObjectPropertySetter(\n readMultiGeometry, 'geometry'),\n 'LineString': makeObjectPropertySetter(\n readLineString, 'geometry'),\n 'LinearRing': makeObjectPropertySetter(\n readLinearRing, 'geometry'),\n 'Point': makeObjectPropertySetter(\n readPoint, 'geometry'),\n 'Polygon': makeObjectPropertySetter(\n readPolygon, 'geometry'),\n 'Style': makeObjectPropertySetter(readStyle),\n 'StyleMap': placemarkStyleMapParser,\n 'address': makeObjectPropertySetter(readString),\n 'description': makeObjectPropertySetter(readString),\n 'name': makeObjectPropertySetter(readString),\n 'open': makeObjectPropertySetter(readBoolean),\n 'phoneNumber': makeObjectPropertySetter(readString),\n 'styleUrl': makeObjectPropertySetter(readURI),\n 'visibility': makeObjectPropertySetter(readBoolean)\n }, makeStructureNS(\n GX_NAMESPACE_URIS, {\n 'MultiTrack': makeObjectPropertySetter(\n readGxMultiTrack, 'geometry'),\n 'Track': makeObjectPropertySetter(\n readGxTrack, 'geometry')\n }\n ));\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {Array.<module:ol/Feature>|undefined} Features.\n */\nKML.prototype.readDocumentOrFolder_ = function(node, objectStack) {\n // FIXME use scope somehow\n const parsersNS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Document': makeArrayExtender(this.readDocumentOrFolder_, this),\n 'Folder': makeArrayExtender(this.readDocumentOrFolder_, this),\n 'Placemark': makeArrayPusher(this.readPlacemark_, this),\n 'Style': this.readSharedStyle_.bind(this),\n 'StyleMap': this.readSharedStyleMap_.bind(this)\n });\n /** @type {Array.<module:ol/Feature>} */\n const features = pushParseAndPop([], parsersNS, node, objectStack, this);\n if (features) {\n return features;\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n * @return {module:ol/Feature|undefined} Feature.\n */\nKML.prototype.readPlacemark_ = function(node, objectStack) {\n const object = pushParseAndPop({'geometry': null},\n PLACEMARK_PARSERS, node, objectStack);\n if (!object) {\n return undefined;\n }\n const feature = new Feature();\n const id = node.getAttribute('id');\n if (id !== null) {\n feature.setId(id);\n }\n const options = /** @type {module:ol/format/Feature~ReadOptions} */ (objectStack[0]);\n\n const geometry = object['geometry'];\n if (geometry) {\n transformWithOptions(geometry, false, options);\n }\n feature.setGeometry(geometry);\n delete object['geometry'];\n\n if (this.extractStyles_) {\n const style = object['Style'];\n const styleUrl = object['styleUrl'];\n const styleFunction = createFeatureStyleFunction(\n style, styleUrl, this.defaultStyle_, this.sharedStyles_,\n this.showPointNames_);\n feature.setStyle(styleFunction);\n }\n delete object['Style'];\n // we do not remove the styleUrl property from the object, so it\n // gets stored on feature when setProperties is called\n\n feature.setProperties(object);\n\n return feature;\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n */\nKML.prototype.readSharedStyle_ = function(node, objectStack) {\n const id = node.getAttribute('id');\n if (id !== null) {\n const style = readStyle(node, objectStack);\n if (style) {\n let styleUri;\n let baseURI = node.baseURI;\n if (!baseURI || baseURI == 'about:blank') {\n baseURI = window.location.href;\n }\n if (baseURI) {\n const url = new URL('#' + id, baseURI);\n styleUri = url.href;\n } else {\n styleUri = '#' + id;\n }\n this.sharedStyles_[styleUri] = style;\n }\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @private\n */\nKML.prototype.readSharedStyleMap_ = function(node, objectStack) {\n const id = node.getAttribute('id');\n if (id === null) {\n return;\n }\n const styleMapValue = readStyleMapValue(node, objectStack);\n if (!styleMapValue) {\n return;\n }\n let styleUri;\n let baseURI = node.baseURI;\n if (!baseURI || baseURI == 'about:blank') {\n baseURI = window.location.href;\n }\n if (baseURI) {\n const url = new URL('#' + id, baseURI);\n styleUri = url.href;\n } else {\n styleUri = '#' + id;\n }\n this.sharedStyles_[styleUri] = styleMapValue;\n};\n\n\n/**\n * Read the first feature from a KML source. MultiGeometries are converted into\n * GeometryCollections if they are a mix of geometry types, and into MultiPoint/\n * MultiLineString/MultiPolygon if they are all of the same type.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/Feature} Feature.\n * @api\n */\nKML.prototype.readFeature;\n\n\n/**\n * @inheritDoc\n */\nKML.prototype.readFeatureFromNode = function(node, opt_options) {\n if (!includes(NAMESPACE_URIS, node.namespaceURI)) {\n return null;\n }\n const feature = this.readPlacemark_(\n node, [this.getReadOptions(node, opt_options)]);\n if (feature) {\n return feature;\n } else {\n return null;\n }\n};\n\n\n/**\n * Read all features from a KML source. MultiGeometries are converted into\n * GeometryCollections if they are a mix of geometry types, and into MultiPoint/\n * MultiLineString/MultiPolygon if they are all of the same type.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nKML.prototype.readFeatures;\n\n\n/**\n * @inheritDoc\n */\nKML.prototype.readFeaturesFromNode = function(node, opt_options) {\n if (!includes(NAMESPACE_URIS, node.namespaceURI)) {\n return [];\n }\n let features;\n const localName = node.localName;\n if (localName == 'Document' || localName == 'Folder') {\n features = this.readDocumentOrFolder_(\n node, [this.getReadOptions(node, opt_options)]);\n if (features) {\n return features;\n } else {\n return [];\n }\n } else if (localName == 'Placemark') {\n const feature = this.readPlacemark_(\n node, [this.getReadOptions(node, opt_options)]);\n if (feature) {\n return [feature];\n } else {\n return [];\n }\n } else if (localName == 'kml') {\n features = [];\n for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n const fs = this.readFeaturesFromNode(n, opt_options);\n if (fs) {\n extend(features, fs);\n }\n }\n return features;\n } else {\n return [];\n }\n};\n\n\n/**\n * Read the name of the KML.\n *\n * @param {Document|Node|string} source Source.\n * @return {string|undefined} Name.\n * @api\n */\nKML.prototype.readName = function(source) {\n if (isDocument(source)) {\n return this.readNameFromDocument(/** @type {Document} */ (source));\n } else if (isNode(source)) {\n return this.readNameFromNode(/** @type {Node} */ (source));\n } else if (typeof source === 'string') {\n const doc = parse(source);\n return this.readNameFromDocument(doc);\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Document} doc Document.\n * @return {string|undefined} Name.\n */\nKML.prototype.readNameFromDocument = function(doc) {\n for (let n = doc.firstChild; n; n = n.nextSibling) {\n if (n.nodeType == Node.ELEMENT_NODE) {\n const name = this.readNameFromNode(n);\n if (name) {\n return name;\n }\n }\n }\n return undefined;\n};\n\n\n/**\n * @param {Node} node Node.\n * @return {string|undefined} Name.\n */\nKML.prototype.readNameFromNode = function(node) {\n for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n if (includes(NAMESPACE_URIS, n.namespaceURI) &&\n n.localName == 'name') {\n return readString(n);\n }\n }\n for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n const localName = n.localName;\n if (includes(NAMESPACE_URIS, n.namespaceURI) &&\n (localName == 'Document' ||\n localName == 'Folder' ||\n localName == 'Placemark' ||\n localName == 'kml')) {\n const name = this.readNameFromNode(n);\n if (name) {\n return name;\n }\n }\n }\n return undefined;\n};\n\n\n/**\n * Read the network links of the KML.\n *\n * @param {Document|Node|string} source Source.\n * @return {Array.<Object>} Network links.\n * @api\n */\nKML.prototype.readNetworkLinks = function(source) {\n const networkLinks = [];\n if (isDocument(source)) {\n extend(networkLinks, this.readNetworkLinksFromDocument(\n /** @type {Document} */ (source)));\n } else if (isNode(source)) {\n extend(networkLinks, this.readNetworkLinksFromNode(\n /** @type {Node} */ (source)));\n } else if (typeof source === 'string') {\n const doc = parse(source);\n extend(networkLinks, this.readNetworkLinksFromDocument(doc));\n }\n return networkLinks;\n};\n\n\n/**\n * @param {Document} doc Document.\n * @return {Array.<Object>} Network links.\n */\nKML.prototype.readNetworkLinksFromDocument = function(doc) {\n const networkLinks = [];\n for (let n = doc.firstChild; n; n = n.nextSibling) {\n if (n.nodeType == Node.ELEMENT_NODE) {\n extend(networkLinks, this.readNetworkLinksFromNode(n));\n }\n }\n return networkLinks;\n};\n\n\n/**\n * @param {Node} node Node.\n * @return {Array.<Object>} Network links.\n */\nKML.prototype.readNetworkLinksFromNode = function(node) {\n const networkLinks = [];\n for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n if (includes(NAMESPACE_URIS, n.namespaceURI) &&\n n.localName == 'NetworkLink') {\n const obj = pushParseAndPop({}, NETWORK_LINK_PARSERS,\n n, []);\n networkLinks.push(obj);\n }\n }\n for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n const localName = n.localName;\n if (includes(NAMESPACE_URIS, n.namespaceURI) &&\n (localName == 'Document' ||\n localName == 'Folder' ||\n localName == 'kml')) {\n extend(networkLinks, this.readNetworkLinksFromNode(n));\n }\n }\n return networkLinks;\n};\n\n\n/**\n * Read the regions of the KML.\n *\n * @param {Document|Node|string} source Source.\n * @return {Array.<Object>} Regions.\n * @api\n */\nKML.prototype.readRegion = function(source) {\n const regions = [];\n if (isDocument(source)) {\n extend(regions, this.readRegionFromDocument(\n /** @type {Document} */ (source)));\n } else if (isNode(source)) {\n extend(regions, this.readRegionFromNode(\n /** @type {Node} */ (source)));\n } else if (typeof source === 'string') {\n const doc = parse(source);\n extend(regions, this.readRegionFromDocument(doc));\n }\n return regions;\n};\n\n\n/**\n * @param {Document} doc Document.\n * @return {Array.<Object>} Region.\n */\nKML.prototype.readRegionFromDocument = function(doc) {\n const regions = [];\n for (let n = doc.firstChild; n; n = n.nextSibling) {\n if (n.nodeType == Node.ELEMENT_NODE) {\n extend(regions, this.readRegionFromNode(n));\n }\n }\n return regions;\n};\n\n\n/**\n * @param {Node} node Node.\n * @return {Array.<Object>} Region.\n * @api\n */\nKML.prototype.readRegionFromNode = function(node) {\n const regions = [];\n for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n if (includes(NAMESPACE_URIS, n.namespaceURI) &&\n n.localName == 'Region') {\n const obj = pushParseAndPop({}, REGION_PARSERS,\n n, []);\n regions.push(obj);\n }\n }\n for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n const localName = n.localName;\n if (includes(NAMESPACE_URIS, n.namespaceURI) &&\n (localName == 'Document' ||\n localName == 'Folder' ||\n localName == 'kml')) {\n extend(regions, this.readRegionFromNode(n));\n }\n }\n return regions;\n};\n\n\n/**\n * Read the projection from a KML source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @return {module:ol/proj/Projection} Projection.\n * @api\n */\nKML.prototype.readProjection;\n\n\n/**\n * @param {Node} node Node to append a TextNode with the color to.\n * @param {module:ol/color~Color|string} color Color.\n */\nfunction writeColorTextNode(node, color) {\n const rgba = asArray(color);\n const opacity = (rgba.length == 4) ? rgba[3] : 1;\n const abgr = [opacity * 255, rgba[2], rgba[1], rgba[0]];\n for (let i = 0; i < 4; ++i) {\n const hex = parseInt(abgr[i], 10).toString(16);\n abgr[i] = (hex.length == 1) ? '0' + hex : hex;\n }\n writeStringTextNode(node, abgr.join(''));\n}\n\n\n/**\n * @param {Node} node Node to append a TextNode with the coordinates to.\n * @param {Array.<number>} coordinates Coordinates.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeCoordinatesTextNode(node, coordinates, objectStack) {\n const context = objectStack[objectStack.length - 1];\n\n const layout = context['layout'];\n const stride = context['stride'];\n\n let dimension;\n if (layout == GeometryLayout.XY ||\n layout == GeometryLayout.XYM) {\n dimension = 2;\n } else if (layout == GeometryLayout.XYZ ||\n layout == GeometryLayout.XYZM) {\n dimension = 3;\n } else {\n assert(false, 34); // Invalid geometry layout\n }\n\n const ii = coordinates.length;\n let text = '';\n if (ii > 0) {\n text += coordinates[0];\n for (let d = 1; d < dimension; ++d) {\n text += ',' + coordinates[d];\n }\n for (let i = stride; i < ii; i += stride) {\n text += ' ' + coordinates[i];\n for (let d = 1; d < dimension; ++d) {\n text += ',' + coordinates[i + d];\n }\n }\n }\n writeStringTextNode(node, text);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst EXTENDEDDATA_NODE_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Data': makeChildAppender(writeDataNode),\n 'value': makeChildAppender(writeDataNodeValue),\n 'displayName': makeChildAppender(writeDataNodeName)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {{name: *, value: *}} pair Name value pair.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeDataNode(node, pair, objectStack) {\n node.setAttribute('name', pair.name);\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: node};\n const value = pair.value;\n\n if (typeof value == 'object') {\n if (value !== null && value.displayName) {\n pushSerializeAndPop(context, EXTENDEDDATA_NODE_SERIALIZERS,\n OBJECT_PROPERTY_NODE_FACTORY, [value.displayName], objectStack, ['displayName']);\n }\n\n if (value !== null && value.value) {\n pushSerializeAndPop(context, EXTENDEDDATA_NODE_SERIALIZERS,\n OBJECT_PROPERTY_NODE_FACTORY, [value.value], objectStack, ['value']);\n }\n } else {\n pushSerializeAndPop(context, EXTENDEDDATA_NODE_SERIALIZERS,\n OBJECT_PROPERTY_NODE_FACTORY, [value], objectStack, ['value']);\n }\n}\n\n\n/**\n * @param {Node} node Node to append a TextNode with the name to.\n * @param {string} name DisplayName.\n */\nfunction writeDataNodeName(node, name) {\n writeCDATASection(node, name);\n}\n\n\n/**\n * @param {Node} node Node to append a CDATA Section with the value to.\n * @param {string} value Value.\n */\nfunction writeDataNodeValue(node, value) {\n writeStringTextNode(node, value);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst DOCUMENT_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Placemark': makeChildAppender(writePlacemark)\n });\n\n\n/**\n * @const\n * @param {*} value Value.\n * @param {Array.<*>} objectStack Object stack.\n * @param {string=} opt_nodeName Node name.\n * @return {Node|undefined} Node.\n */\nconst DOCUMENT_NODE_FACTORY = function(value, objectStack, opt_nodeName) {\n const parentNode = objectStack[objectStack.length - 1].node;\n return createElementNS(parentNode.namespaceURI, 'Placemark');\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {Array.<*>} objectStack Object stack.\n * @this {module:ol/format/KML}\n */\nfunction writeDocument(node, features, objectStack) {\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: node};\n pushSerializeAndPop(context, DOCUMENT_SERIALIZERS,\n DOCUMENT_NODE_FACTORY, features, objectStack, undefined,\n this);\n}\n\n\n/**\n * A factory for creating Data nodes.\n * @const\n * @type {function(*, Array.<*>): (Node|undefined)}\n */\nconst DATA_NODE_FACTORY = makeSimpleNodeFactory('Data');\n\n\n/**\n * @param {Node} node Node.\n * @param {{names: Array<string>, values: (Array<*>)}} namesAndValues Names and values.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeExtendedData(node, namesAndValues, objectStack) {\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: node};\n const names = namesAndValues.names;\n const values = namesAndValues.values;\n const length = names.length;\n\n for (let i = 0; i < length; i++) {\n pushSerializeAndPop(context, EXTENDEDDATA_NODE_SERIALIZERS,\n DATA_NODE_FACTORY, [{name: names[i], value: values[i]}], objectStack);\n }\n}\n\n\n/**\n * @const\n * @type {Object.<string, Array.<string>>}\n */\nconst ICON_SEQUENCE = makeStructureNS(\n NAMESPACE_URIS, [\n 'href'\n ],\n makeStructureNS(GX_NAMESPACE_URIS, [\n 'x', 'y', 'w', 'h'\n ]));\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst ICON_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'href': makeChildAppender(writeStringTextNode)\n }, makeStructureNS(\n GX_NAMESPACE_URIS, {\n 'x': makeChildAppender(writeDecimalTextNode),\n 'y': makeChildAppender(writeDecimalTextNode),\n 'w': makeChildAppender(writeDecimalTextNode),\n 'h': makeChildAppender(writeDecimalTextNode)\n }));\n\n\n/**\n * @const\n * @param {*} value Value.\n * @param {Array.<*>} objectStack Object stack.\n * @param {string=} opt_nodeName Node name.\n * @return {Node|undefined} Node.\n */\nconst GX_NODE_FACTORY = function(value, objectStack, opt_nodeName) {\n return createElementNS(GX_NAMESPACE_URIS[0],\n 'gx:' + opt_nodeName);\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Object} icon Icon object.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeIcon(node, icon, objectStack) {\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: node};\n const parentNode = objectStack[objectStack.length - 1].node;\n let orderedKeys = ICON_SEQUENCE[parentNode.namespaceURI];\n let values = makeSequence(icon, orderedKeys);\n pushSerializeAndPop(context,\n ICON_SERIALIZERS, OBJECT_PROPERTY_NODE_FACTORY,\n values, objectStack, orderedKeys);\n orderedKeys =\n ICON_SEQUENCE[GX_NAMESPACE_URIS[0]];\n values = makeSequence(icon, orderedKeys);\n pushSerializeAndPop(context, ICON_SERIALIZERS,\n GX_NODE_FACTORY, values, objectStack, orderedKeys);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Array.<string>>}\n */\nconst ICON_STYLE_SEQUENCE = makeStructureNS(\n NAMESPACE_URIS, [\n 'scale', 'heading', 'Icon', 'hotSpot'\n ]);\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst ICON_STYLE_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Icon': makeChildAppender(writeIcon),\n 'heading': makeChildAppender(writeDecimalTextNode),\n 'hotSpot': makeChildAppender(writeVec2),\n 'scale': makeChildAppender(writeScaleTextNode)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/style/Icon} style Icon style.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeIconStyle(node, style, objectStack) {\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: node};\n const properties = {};\n const src = style.getSrc();\n const size = style.getSize();\n const iconImageSize = style.getImageSize();\n const iconProperties = {\n 'href': src\n };\n\n if (size) {\n iconProperties['w'] = size[0];\n iconProperties['h'] = size[1];\n const anchor = style.getAnchor(); // top-left\n const origin = style.getOrigin(); // top-left\n\n if (origin && iconImageSize && origin[0] !== 0 && origin[1] !== size[1]) {\n iconProperties['x'] = origin[0];\n iconProperties['y'] = iconImageSize[1] - (origin[1] + size[1]);\n }\n\n if (anchor && (anchor[0] !== size[0] / 2 || anchor[1] !== size[1] / 2)) {\n const /** @type {module:ol/format/KML~Vec2} */ hotSpot = {\n x: anchor[0],\n xunits: IconAnchorUnits.PIXELS,\n y: size[1] - anchor[1],\n yunits: IconAnchorUnits.PIXELS\n };\n properties['hotSpot'] = hotSpot;\n }\n }\n\n properties['Icon'] = iconProperties;\n\n const scale = style.getScale();\n if (scale !== 1) {\n properties['scale'] = scale;\n }\n\n const rotation = style.getRotation();\n if (rotation !== 0) {\n properties['heading'] = rotation; // 0-360\n }\n\n const parentNode = objectStack[objectStack.length - 1].node;\n const orderedKeys = ICON_STYLE_SEQUENCE[parentNode.namespaceURI];\n const values = makeSequence(properties, orderedKeys);\n pushSerializeAndPop(context, ICON_STYLE_SERIALIZERS,\n OBJECT_PROPERTY_NODE_FACTORY, values, objectStack, orderedKeys);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Array.<string>>}\n */\nconst LABEL_STYLE_SEQUENCE = makeStructureNS(\n NAMESPACE_URIS, [\n 'color', 'scale'\n ]);\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst LABEL_STYLE_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'color': makeChildAppender(writeColorTextNode),\n 'scale': makeChildAppender(writeScaleTextNode)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/style/Text} style style.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeLabelStyle(node, style, objectStack) {\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: node};\n const properties = {};\n const fill = style.getFill();\n if (fill) {\n properties['color'] = fill.getColor();\n }\n const scale = style.getScale();\n if (scale && scale !== 1) {\n properties['scale'] = scale;\n }\n const parentNode = objectStack[objectStack.length - 1].node;\n const orderedKeys =\n LABEL_STYLE_SEQUENCE[parentNode.namespaceURI];\n const values = makeSequence(properties, orderedKeys);\n pushSerializeAndPop(context, LABEL_STYLE_SERIALIZERS,\n OBJECT_PROPERTY_NODE_FACTORY, values, objectStack, orderedKeys);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Array.<string>>}\n */\nconst LINE_STYLE_SEQUENCE = makeStructureNS(\n NAMESPACE_URIS, [\n 'color', 'width'\n ]);\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst LINE_STYLE_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'color': makeChildAppender(writeColorTextNode),\n 'width': makeChildAppender(writeDecimalTextNode)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/style/Stroke} style style.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeLineStyle(node, style, objectStack) {\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: node};\n const properties = {\n 'color': style.getColor(),\n 'width': style.getWidth()\n };\n const parentNode = objectStack[objectStack.length - 1].node;\n const orderedKeys = LINE_STYLE_SEQUENCE[parentNode.namespaceURI];\n const values = makeSequence(properties, orderedKeys);\n pushSerializeAndPop(context, LINE_STYLE_SERIALIZERS,\n OBJECT_PROPERTY_NODE_FACTORY, values, objectStack, orderedKeys);\n}\n\n\n/**\n * @const\n * @type {Object.<string, string>}\n */\nconst GEOMETRY_TYPE_TO_NODENAME = {\n 'Point': 'Point',\n 'LineString': 'LineString',\n 'LinearRing': 'LinearRing',\n 'Polygon': 'Polygon',\n 'MultiPoint': 'MultiGeometry',\n 'MultiLineString': 'MultiGeometry',\n 'MultiPolygon': 'MultiGeometry',\n 'GeometryCollection': 'MultiGeometry'\n};\n\n\n/**\n * @const\n * @param {*} value Value.\n * @param {Array.<*>} objectStack Object stack.\n * @param {string=} opt_nodeName Node name.\n * @return {Node|undefined} Node.\n */\nconst GEOMETRY_NODE_FACTORY = function(value, objectStack, opt_nodeName) {\n if (value) {\n const parentNode = objectStack[objectStack.length - 1].node;\n return createElementNS(parentNode.namespaceURI,\n GEOMETRY_TYPE_TO_NODENAME[/** @type {module:ol/geom/Geometry} */ (value).getType()]);\n }\n};\n\n\n/**\n * A factory for creating Point nodes.\n * @const\n * @type {function(*, Array.<*>, string=): (Node|undefined)}\n */\nconst POINT_NODE_FACTORY = makeSimpleNodeFactory('Point');\n\n\n/**\n * A factory for creating LineString nodes.\n * @const\n * @type {function(*, Array.<*>, string=): (Node|undefined)}\n */\nconst LINE_STRING_NODE_FACTORY = makeSimpleNodeFactory('LineString');\n\n\n/**\n * A factory for creating LinearRing nodes.\n * @const\n * @type {function(*, Array.<*>, string=): (Node|undefined)}\n */\nconst LINEAR_RING_NODE_FACTORY = makeSimpleNodeFactory('LinearRing');\n\n\n/**\n * A factory for creating Polygon nodes.\n * @const\n * @type {function(*, Array.<*>, string=): (Node|undefined)}\n */\nconst POLYGON_NODE_FACTORY = makeSimpleNodeFactory('Polygon');\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst MULTI_GEOMETRY_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'LineString': makeChildAppender(\n writePrimitiveGeometry),\n 'Point': makeChildAppender(\n writePrimitiveGeometry),\n 'Polygon': makeChildAppender(writePolygon),\n 'GeometryCollection': makeChildAppender(\n writeMultiGeometry)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeMultiGeometry(node, geometry, objectStack) {\n /** @type {module:ol/xml~NodeStackItem} */\n const context = {node: node};\n const type = geometry.getType();\n /** @type {Array.<module:ol/geom/Geometry>} */\n let geometries;\n /** @type {function(*, Array.<*>, string=): (Node|undefined)} */\n let factory;\n if (type == GeometryType.GEOMETRY_COLLECTION) {\n geometries = /** @type {module:ol/geom/GeometryCollection} */ (geometry).getGeometries();\n factory = GEOMETRY_NODE_FACTORY;\n } else if (type == GeometryType.MULTI_POINT) {\n geometries = /** @type {module:ol/geom/MultiPoint} */ (geometry).getPoints();\n factory = POINT_NODE_FACTORY;\n } else if (type == GeometryType.MULTI_LINE_STRING) {\n geometries =\n (/** @type {module:ol/geom/MultiLineString} */ (geometry)).getLineStrings();\n factory = LINE_STRING_NODE_FACTORY;\n } else if (type == GeometryType.MULTI_POLYGON) {\n geometries =\n (/** @type {module:ol/geom/MultiPolygon} */ (geometry)).getPolygons();\n factory = POLYGON_NODE_FACTORY;\n } else {\n assert(false, 39); // Unknown geometry type\n }\n pushSerializeAndPop(context,\n MULTI_GEOMETRY_SERIALIZERS, factory,\n geometries, objectStack);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst BOUNDARY_IS_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'LinearRing': makeChildAppender(\n writePrimitiveGeometry)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/LinearRing} linearRing Linear ring.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeBoundaryIs(node, linearRing, objectStack) {\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: node};\n pushSerializeAndPop(context,\n BOUNDARY_IS_SERIALIZERS,\n LINEAR_RING_NODE_FACTORY, [linearRing], objectStack);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst PLACEMARK_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'ExtendedData': makeChildAppender(writeExtendedData),\n 'MultiGeometry': makeChildAppender(writeMultiGeometry),\n 'LineString': makeChildAppender(writePrimitiveGeometry),\n 'LinearRing': makeChildAppender(writePrimitiveGeometry),\n 'Point': makeChildAppender(writePrimitiveGeometry),\n 'Polygon': makeChildAppender(writePolygon),\n 'Style': makeChildAppender(writeStyle),\n 'address': makeChildAppender(writeStringTextNode),\n 'description': makeChildAppender(writeStringTextNode),\n 'name': makeChildAppender(writeStringTextNode),\n 'open': makeChildAppender(writeBooleanTextNode),\n 'phoneNumber': makeChildAppender(writeStringTextNode),\n 'styleUrl': makeChildAppender(writeStringTextNode),\n 'visibility': makeChildAppender(writeBooleanTextNode)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Array.<string>>}\n */\nconst PLACEMARK_SEQUENCE = makeStructureNS(\n NAMESPACE_URIS, [\n 'name', 'open', 'visibility', 'address', 'phoneNumber', 'description',\n 'styleUrl', 'Style'\n ]);\n\n\n/**\n * A factory for creating ExtendedData nodes.\n * @const\n * @type {function(*, Array.<*>): (Node|undefined)}\n */\nconst EXTENDEDDATA_NODE_FACTORY = makeSimpleNodeFactory('ExtendedData');\n\n\n/**\n * FIXME currently we do serialize arbitrary/custom feature properties\n * (ExtendedData).\n * @param {Node} node Node.\n * @param {module:ol/Feature} feature Feature.\n * @param {Array.<*>} objectStack Object stack.\n * @this {module:ol/format/KML}\n */\nfunction writePlacemark(node, feature, objectStack) {\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: node};\n\n // set id\n if (feature.getId()) {\n node.setAttribute('id', feature.getId());\n }\n\n // serialize properties (properties unknown to KML are not serialized)\n const properties = feature.getProperties();\n\n // don't export these to ExtendedData\n const filter = {'address': 1, 'description': 1, 'name': 1, 'open': 1,\n 'phoneNumber': 1, 'styleUrl': 1, 'visibility': 1};\n filter[feature.getGeometryName()] = 1;\n const keys = Object.keys(properties || {}).sort().filter(function(v) {\n return !filter[v];\n });\n\n if (keys.length > 0) {\n const sequence = makeSequence(properties, keys);\n const namesAndValues = {names: keys, values: sequence};\n pushSerializeAndPop(context, PLACEMARK_SERIALIZERS,\n EXTENDEDDATA_NODE_FACTORY, [namesAndValues], objectStack);\n }\n\n const styleFunction = feature.getStyleFunction();\n if (styleFunction) {\n // FIXME the styles returned by the style function are supposed to be\n // resolution-independent here\n const styles = styleFunction(feature, 0);\n if (styles) {\n const style = Array.isArray(styles) ? styles[0] : styles;\n if (this.writeStyles_) {\n properties['Style'] = style;\n }\n const textStyle = style.getText();\n if (textStyle) {\n properties['name'] = textStyle.getText();\n }\n }\n }\n const parentNode = objectStack[objectStack.length - 1].node;\n const orderedKeys = PLACEMARK_SEQUENCE[parentNode.namespaceURI];\n const values = makeSequence(properties, orderedKeys);\n pushSerializeAndPop(context, PLACEMARK_SERIALIZERS,\n OBJECT_PROPERTY_NODE_FACTORY, values, objectStack, orderedKeys);\n\n // serialize geometry\n const options = /** @type {module:ol/format/Feature~WriteOptions} */ (objectStack[0]);\n let geometry = feature.getGeometry();\n if (geometry) {\n geometry = transformWithOptions(geometry, true, options);\n }\n pushSerializeAndPop(context, PLACEMARK_SERIALIZERS,\n GEOMETRY_NODE_FACTORY, [geometry], objectStack);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Array.<string>>}\n */\nconst PRIMITIVE_GEOMETRY_SEQUENCE = makeStructureNS(\n NAMESPACE_URIS, [\n 'extrude', 'tessellate', 'altitudeMode', 'coordinates'\n ]);\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst PRIMITIVE_GEOMETRY_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'extrude': makeChildAppender(writeBooleanTextNode),\n 'tessellate': makeChildAppender(writeBooleanTextNode),\n 'altitudeMode': makeChildAppender(writeStringTextNode),\n 'coordinates': makeChildAppender(writeCoordinatesTextNode)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/SimpleGeometry} geometry Geometry.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writePrimitiveGeometry(node, geometry, objectStack) {\n const flatCoordinates = geometry.getFlatCoordinates();\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: node};\n context['layout'] = geometry.getLayout();\n context['stride'] = geometry.getStride();\n\n // serialize properties (properties unknown to KML are not serialized)\n const properties = geometry.getProperties();\n properties.coordinates = flatCoordinates;\n\n const parentNode = objectStack[objectStack.length - 1].node;\n const orderedKeys = PRIMITIVE_GEOMETRY_SEQUENCE[parentNode.namespaceURI];\n const values = makeSequence(properties, orderedKeys);\n pushSerializeAndPop(context, PRIMITIVE_GEOMETRY_SERIALIZERS,\n OBJECT_PROPERTY_NODE_FACTORY, values, objectStack, orderedKeys);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst POLYGON_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'outerBoundaryIs': makeChildAppender(\n writeBoundaryIs),\n 'innerBoundaryIs': makeChildAppender(\n writeBoundaryIs)\n });\n\n\n/**\n * A factory for creating innerBoundaryIs nodes.\n * @const\n * @type {function(*, Array.<*>, string=): (Node|undefined)}\n */\nconst INNER_BOUNDARY_NODE_FACTORY = makeSimpleNodeFactory('innerBoundaryIs');\n\n\n/**\n * A factory for creating outerBoundaryIs nodes.\n * @const\n * @type {function(*, Array.<*>, string=): (Node|undefined)}\n */\nconst OUTER_BOUNDARY_NODE_FACTORY = makeSimpleNodeFactory('outerBoundaryIs');\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/geom/Polygon} polygon Polygon.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writePolygon(node, polygon, objectStack) {\n const linearRings = polygon.getLinearRings();\n const outerRing = linearRings.shift();\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: node};\n // inner rings\n pushSerializeAndPop(context,\n POLYGON_SERIALIZERS,\n INNER_BOUNDARY_NODE_FACTORY,\n linearRings, objectStack);\n // outer ring\n pushSerializeAndPop(context,\n POLYGON_SERIALIZERS,\n OUTER_BOUNDARY_NODE_FACTORY,\n [outerRing], objectStack);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst POLY_STYLE_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'color': makeChildAppender(writeColorTextNode)\n });\n\n\n/**\n * A factory for creating coordinates nodes.\n * @const\n * @type {function(*, Array.<*>, string=): (Node|undefined)}\n */\nconst COLOR_NODE_FACTORY = makeSimpleNodeFactory('color');\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/style/Fill} style Style.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writePolyStyle(node, style, objectStack) {\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: node};\n pushSerializeAndPop(context, POLY_STYLE_SERIALIZERS,\n COLOR_NODE_FACTORY, [style.getColor()], objectStack);\n}\n\n\n/**\n * @param {Node} node Node to append a TextNode with the scale to.\n * @param {number|undefined} scale Scale.\n */\nfunction writeScaleTextNode(node, scale) {\n // the Math is to remove any excess decimals created by float arithmetic\n writeDecimalTextNode(node,\n Math.round(scale * 1e6) / 1e6);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Array.<string>>}\n */\nconst STYLE_SEQUENCE = makeStructureNS(\n NAMESPACE_URIS, [\n 'IconStyle', 'LabelStyle', 'LineStyle', 'PolyStyle'\n ]);\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst STYLE_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'IconStyle': makeChildAppender(writeIconStyle),\n 'LabelStyle': makeChildAppender(writeLabelStyle),\n 'LineStyle': makeChildAppender(writeLineStyle),\n 'PolyStyle': makeChildAppender(writePolyStyle)\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/style/Style} style Style.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction writeStyle(node, style, objectStack) {\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: node};\n const properties = {};\n const fillStyle = style.getFill();\n const strokeStyle = style.getStroke();\n const imageStyle = style.getImage();\n const textStyle = style.getText();\n if (imageStyle instanceof Icon) {\n properties['IconStyle'] = imageStyle;\n }\n if (textStyle) {\n properties['LabelStyle'] = textStyle;\n }\n if (strokeStyle) {\n properties['LineStyle'] = strokeStyle;\n }\n if (fillStyle) {\n properties['PolyStyle'] = fillStyle;\n }\n const parentNode = objectStack[objectStack.length - 1].node;\n const orderedKeys = STYLE_SEQUENCE[parentNode.namespaceURI];\n const values = makeSequence(properties, orderedKeys);\n pushSerializeAndPop(context, STYLE_SERIALIZERS,\n OBJECT_PROPERTY_NODE_FACTORY, values, objectStack, orderedKeys);\n}\n\n\n/**\n * @param {Node} node Node to append a TextNode with the Vec2 to.\n * @param {module:ol/format/KML~Vec2} vec2 Vec2.\n */\nfunction writeVec2(node, vec2) {\n node.setAttribute('x', vec2.x);\n node.setAttribute('y', vec2.y);\n node.setAttribute('xunits', vec2.xunits);\n node.setAttribute('yunits', vec2.yunits);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Array.<string>>}\n */\nconst KML_SEQUENCE = makeStructureNS(\n NAMESPACE_URIS, [\n 'Document', 'Placemark'\n ]);\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst KML_SERIALIZERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Document': makeChildAppender(writeDocument),\n 'Placemark': makeChildAppender(writePlacemark)\n });\n\n\n/**\n * Encode an array of features in the KML format. GeometryCollections, MultiPoints,\n * MultiLineStrings, and MultiPolygons are output as MultiGeometries.\n *\n * @function\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Options.\n * @return {string} Result.\n * @api\n */\nKML.prototype.writeFeatures;\n\n\n/**\n * Encode an array of features in the KML format as an XML node. GeometryCollections,\n * MultiPoints, MultiLineStrings, and MultiPolygons are output as MultiGeometries.\n *\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Options.\n * @return {Node} Node.\n * @override\n * @api\n */\nKML.prototype.writeFeaturesNode = function(features, opt_options) {\n opt_options = this.adaptOptions(opt_options);\n const kml = createElementNS(NAMESPACE_URIS[4], 'kml');\n const xmlnsUri = 'http://www.w3.org/2000/xmlns/';\n kml.setAttributeNS(xmlnsUri, 'xmlns:gx', GX_NAMESPACE_URIS[0]);\n kml.setAttributeNS(xmlnsUri, 'xmlns:xsi', XML_SCHEMA_INSTANCE_URI);\n kml.setAttributeNS(XML_SCHEMA_INSTANCE_URI, 'xsi:schemaLocation', SCHEMA_LOCATION);\n\n const /** @type {module:ol/xml~NodeStackItem} */ context = {node: kml};\n const properties = {};\n if (features.length > 1) {\n properties['Document'] = features;\n } else if (features.length == 1) {\n properties['Placemark'] = features[0];\n }\n const orderedKeys = KML_SEQUENCE[kml.namespaceURI];\n const values = makeSequence(properties, orderedKeys);\n pushSerializeAndPop(context, KML_SERIALIZERS,\n OBJECT_PROPERTY_NODE_FACTORY, values, [opt_options], orderedKeys,\n this);\n return kml;\n};\n\nexport default KML;\n","/**\n * @module ol/style/IconOrigin\n */\n\n/**\n * Icon origin. One of 'bottom-left', 'bottom-right', 'top-left', 'top-right'.\n * @enum {string}\n */\nexport default {\n BOTTOM_LEFT: 'bottom-left',\n BOTTOM_RIGHT: 'bottom-right',\n TOP_LEFT: 'top-left',\n TOP_RIGHT: 'top-right'\n};\n","/**\n * @module ol/style/Icon\n */\nimport {getUid, inherits} from '../util.js';\nimport ImageState from '../ImageState.js';\nimport {assert} from '../asserts.js';\nimport {asArray} from '../color.js';\nimport {listen, unlisten} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport IconAnchorUnits from '../style/IconAnchorUnits.js';\nimport {get as getIconImage} from '../style/IconImage.js';\nimport IconOrigin from '../style/IconOrigin.js';\nimport ImageStyle from '../style/Image.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {Array.<number>} [anchor=[0.5, 0.5]] Anchor. Default value is the icon center.\n * @property {module:ol/style/IconOrigin} [anchorOrigin] Origin of the anchor: `bottom-left`, `bottom-right`,\n * `top-left` or `top-right`. Default is `top-left`.\n * @property {module:ol/style/IconAnchorUnits} [anchorXUnits] Units in which the anchor x value is\n * specified. A value of `'fraction'` indicates the x value is a fraction of the icon. A value of `'pixels'` indicates\n * the x value in pixels. Default is `'fraction'`.\n * @property {module:ol/style/IconAnchorUnits} [anchorYUnits] Units in which the anchor y value is\n * specified. A value of `'fraction'` indicates the y value is a fraction of the icon. A value of `'pixels'` indicates\n * the y value in pixels. Default is `'fraction'`.\n * @property {module:ol/color~Color|string} [color] Color to tint the icon. If not specified,\n * the icon will be left as is.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that you must provide a\n * `crossOrigin` value if you are using the WebGL renderer or if you want to access pixel data with the Canvas renderer.\n * See {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.\n * @property {Image|HTMLCanvasElement} [img] Image object for the icon. If the `src` option is not provided then the\n * provided image must already be loaded. And in that case, it is required\n * to provide the size of the image, with the `imgSize` option.\n * @property {Array.<number>} [offset=[0, 0]] Offset, which, together with the size and the offset origin, define the\n * sub-rectangle to use from the original icon image.\n * @property {module:ol/style/IconOrigin} [offsetOrigin] Origin of the offset: `bottom-left`, `bottom-right`,\n * `top-left` or `top-right`. Default is `top-left`.\n * @property {number} [opacity=1] Opacity of the icon.\n * @property {number} [scale=1] Scale.\n * @property {boolean} [snapToPixel=true] If `true` integral numbers of pixels are used as the X and Y pixel coordinate\n * when drawing the icon in the output canvas. If `false` fractional numbers may be used. Using `true` allows for\n * \"sharp\" rendering (no blur), while using `false` allows for \"accurate\" rendering. Note that accuracy is important if\n * the icon's position is animated. Without it, the icon may jitter noticeably.\n * @property {boolean} [rotateWithView=false] Whether to rotate the icon with the view.\n * @property {number} [rotation=0] Rotation in radians (positive rotation clockwise).\n * @property {module:ol/size~Size} [size] Icon size in pixel. Can be used together with `offset` to define the\n * sub-rectangle to use from the origin (sprite) icon image.\n * @property {module:ol/size~Size} [imgSize] Image size in pixels. Only required if `img` is set and `src` is not, and\n * for SVG images in Internet Explorer 11. The provided `imgSize` needs to match the actual size of the image.\n * @property {string} [src] Image source URI.\n */\n\n\n/**\n * @classdesc\n * Set icon style for vector features.\n *\n * @constructor\n * @param {module:ol/style/Icon~Options=} opt_options Options.\n * @extends {module:ol/style/Image}\n * @api\n */\nconst Icon = function(opt_options) {\n\n const options = opt_options || {};\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.anchor_ = options.anchor !== undefined ? options.anchor : [0.5, 0.5];\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.normalizedAnchor_ = null;\n\n /**\n * @private\n * @type {module:ol/style/IconOrigin}\n */\n this.anchorOrigin_ = options.anchorOrigin !== undefined ?\n options.anchorOrigin : IconOrigin.TOP_LEFT;\n\n /**\n * @private\n * @type {module:ol/style/IconAnchorUnits}\n */\n this.anchorXUnits_ = options.anchorXUnits !== undefined ?\n options.anchorXUnits : IconAnchorUnits.FRACTION;\n\n /**\n * @private\n * @type {module:ol/style/IconAnchorUnits}\n */\n this.anchorYUnits_ = options.anchorYUnits !== undefined ?\n options.anchorYUnits : IconAnchorUnits.FRACTION;\n\n /**\n * @private\n * @type {?string}\n */\n this.crossOrigin_ =\n options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n /**\n * @type {Image|HTMLCanvasElement}\n */\n const image = options.img !== undefined ? options.img : null;\n\n /**\n * @type {module:ol/size~Size}\n */\n const imgSize = options.imgSize !== undefined ? options.imgSize : null;\n\n /**\n * @type {string|undefined}\n */\n let src = options.src;\n\n assert(!(src !== undefined && image),\n 4); // `image` and `src` cannot be provided at the same time\n assert(!image || (image && imgSize),\n 5); // `imgSize` must be set when `image` is provided\n\n if ((src === undefined || src.length === 0) && image) {\n src = image.src || getUid(image).toString();\n }\n assert(src !== undefined && src.length > 0,\n 6); // A defined and non-empty `src` or `image` must be provided\n\n /**\n * @type {module:ol/ImageState}\n */\n const imageState = options.src !== undefined ?\n ImageState.IDLE : ImageState.LOADED;\n\n /**\n * @private\n * @type {module:ol/color~Color}\n */\n this.color_ = options.color !== undefined ? asArray(options.color) : null;\n\n /**\n * @private\n * @type {module:ol/style/IconImage}\n */\n this.iconImage_ = getIconImage(\n image, /** @type {string} */ (src), imgSize, this.crossOrigin_, imageState, this.color_);\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.offset_ = options.offset !== undefined ? options.offset : [0, 0];\n\n /**\n * @private\n * @type {module:ol/style/IconOrigin}\n */\n this.offsetOrigin_ = options.offsetOrigin !== undefined ?\n options.offsetOrigin : IconOrigin.TOP_LEFT;\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.origin_ = null;\n\n /**\n * @private\n * @type {module:ol/size~Size}\n */\n this.size_ = options.size !== undefined ? options.size : null;\n\n /**\n * @type {number}\n */\n const opacity = options.opacity !== undefined ? options.opacity : 1;\n\n /**\n * @type {boolean}\n */\n const rotateWithView = options.rotateWithView !== undefined ?\n options.rotateWithView : false;\n\n /**\n * @type {number}\n */\n const rotation = options.rotation !== undefined ? options.rotation : 0;\n\n /**\n * @type {number}\n */\n const scale = options.scale !== undefined ? options.scale : 1;\n\n /**\n * @type {boolean}\n */\n const snapToPixel = options.snapToPixel !== undefined ?\n options.snapToPixel : true;\n\n ImageStyle.call(this, {\n opacity: opacity,\n rotation: rotation,\n scale: scale,\n snapToPixel: snapToPixel,\n rotateWithView: rotateWithView\n });\n\n};\n\ninherits(Icon, ImageStyle);\n\n\n/**\n * Clones the style. The underlying Image/HTMLCanvasElement is not cloned.\n * @return {module:ol/style/Icon} The cloned style.\n * @api\n */\nIcon.prototype.clone = function() {\n return new Icon({\n anchor: this.anchor_.slice(),\n anchorOrigin: this.anchorOrigin_,\n anchorXUnits: this.anchorXUnits_,\n anchorYUnits: this.anchorYUnits_,\n crossOrigin: this.crossOrigin_,\n color: (this.color_ && this.color_.slice) ? this.color_.slice() : this.color_ || undefined,\n src: this.getSrc(),\n offset: this.offset_.slice(),\n offsetOrigin: this.offsetOrigin_,\n size: this.size_ !== null ? this.size_.slice() : undefined,\n opacity: this.getOpacity(),\n scale: this.getScale(),\n snapToPixel: this.getSnapToPixel(),\n rotation: this.getRotation(),\n rotateWithView: this.getRotateWithView()\n });\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nIcon.prototype.getAnchor = function() {\n if (this.normalizedAnchor_) {\n return this.normalizedAnchor_;\n }\n let anchor = this.anchor_;\n const size = this.getSize();\n if (this.anchorXUnits_ == IconAnchorUnits.FRACTION ||\n this.anchorYUnits_ == IconAnchorUnits.FRACTION) {\n if (!size) {\n return null;\n }\n anchor = this.anchor_.slice();\n if (this.anchorXUnits_ == IconAnchorUnits.FRACTION) {\n anchor[0] *= size[0];\n }\n if (this.anchorYUnits_ == IconAnchorUnits.FRACTION) {\n anchor[1] *= size[1];\n }\n }\n\n if (this.anchorOrigin_ != IconOrigin.TOP_LEFT) {\n if (!size) {\n return null;\n }\n if (anchor === this.anchor_) {\n anchor = this.anchor_.slice();\n }\n if (this.anchorOrigin_ == IconOrigin.TOP_RIGHT ||\n this.anchorOrigin_ == IconOrigin.BOTTOM_RIGHT) {\n anchor[0] = -anchor[0] + size[0];\n }\n if (this.anchorOrigin_ == IconOrigin.BOTTOM_LEFT ||\n this.anchorOrigin_ == IconOrigin.BOTTOM_RIGHT) {\n anchor[1] = -anchor[1] + size[1];\n }\n }\n this.normalizedAnchor_ = anchor;\n return this.normalizedAnchor_;\n};\n\n\n/**\n * Get the icon color.\n * @return {module:ol/color~Color} Color.\n * @api\n */\nIcon.prototype.getColor = function() {\n return this.color_;\n};\n\n\n/**\n * Get the image icon.\n * @param {number} pixelRatio Pixel ratio.\n * @return {Image|HTMLCanvasElement} Image or Canvas element.\n * @override\n * @api\n */\nIcon.prototype.getImage = function(pixelRatio) {\n return this.iconImage_.getImage(pixelRatio);\n};\n\n\n/**\n * @override\n */\nIcon.prototype.getImageSize = function() {\n return this.iconImage_.getSize();\n};\n\n\n/**\n * @override\n */\nIcon.prototype.getHitDetectionImageSize = function() {\n return this.getImageSize();\n};\n\n\n/**\n * @override\n */\nIcon.prototype.getImageState = function() {\n return this.iconImage_.getImageState();\n};\n\n\n/**\n * @override\n */\nIcon.prototype.getHitDetectionImage = function(pixelRatio) {\n return this.iconImage_.getHitDetectionImage(pixelRatio);\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nIcon.prototype.getOrigin = function() {\n if (this.origin_) {\n return this.origin_;\n }\n let offset = this.offset_;\n\n if (this.offsetOrigin_ != IconOrigin.TOP_LEFT) {\n const size = this.getSize();\n const iconImageSize = this.iconImage_.getSize();\n if (!size || !iconImageSize) {\n return null;\n }\n offset = offset.slice();\n if (this.offsetOrigin_ == IconOrigin.TOP_RIGHT ||\n this.offsetOrigin_ == IconOrigin.BOTTOM_RIGHT) {\n offset[0] = iconImageSize[0] - size[0] - offset[0];\n }\n if (this.offsetOrigin_ == IconOrigin.BOTTOM_LEFT ||\n this.offsetOrigin_ == IconOrigin.BOTTOM_RIGHT) {\n offset[1] = iconImageSize[1] - size[1] - offset[1];\n }\n }\n this.origin_ = offset;\n return this.origin_;\n};\n\n\n/**\n * Get the image URL.\n * @return {string|undefined} Image src.\n * @api\n */\nIcon.prototype.getSrc = function() {\n return this.iconImage_.getSrc();\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nIcon.prototype.getSize = function() {\n return !this.size_ ? this.iconImage_.getSize() : this.size_;\n};\n\n\n/**\n * @override\n */\nIcon.prototype.listenImageChange = function(listener, thisArg) {\n return listen(this.iconImage_, EventType.CHANGE,\n listener, thisArg);\n};\n\n\n/**\n * Load not yet loaded URI.\n * When rendering a feature with an icon style, the vector renderer will\n * automatically call this method. However, you might want to call this\n * method yourself for preloading or other purposes.\n * @override\n * @api\n */\nIcon.prototype.load = function() {\n this.iconImage_.load();\n};\n\n\n/**\n * @override\n */\nIcon.prototype.unlistenImageChange = function(listener, thisArg) {\n unlisten(this.iconImage_, EventType.CHANGE,\n listener, thisArg);\n};\nexport default Icon;\n","exports.read = function (buffer, offset, isLE, mLen, nBytes) {\n var e, m\n var eLen = (nBytes * 8) - mLen - 1\n var eMax = (1 << eLen) - 1\n var eBias = eMax >> 1\n var nBits = -7\n var i = isLE ? (nBytes - 1) : 0\n var d = isLE ? -1 : 1\n var s = buffer[offset + i]\n\n i += d\n\n e = s & ((1 << (-nBits)) - 1)\n s >>= (-nBits)\n nBits += eLen\n for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n m = e & ((1 << (-nBits)) - 1)\n e >>= (-nBits)\n nBits += mLen\n for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}\n\n if (e === 0) {\n e = 1 - eBias\n } else if (e === eMax) {\n return m ? NaN : ((s ? -1 : 1) * Infinity)\n } else {\n m = m + Math.pow(2, mLen)\n e = e - eBias\n }\n return (s ? -1 : 1) * m * Math.pow(2, e - mLen)\n}\n\nexports.write = function (buffer, value, offset, isLE, mLen, nBytes) {\n var e, m, c\n var eLen = (nBytes * 8) - mLen - 1\n var eMax = (1 << eLen) - 1\n var eBias = eMax >> 1\n var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)\n var i = isLE ? 0 : (nBytes - 1)\n var d = isLE ? 1 : -1\n var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0\n\n value = Math.abs(value)\n\n if (isNaN(value) || value === Infinity) {\n m = isNaN(value) ? 1 : 0\n e = eMax\n } else {\n e = Math.floor(Math.log(value) / Math.LN2)\n if (value * (c = Math.pow(2, -e)) < 1) {\n e--\n c *= 2\n }\n if (e + eBias >= 1) {\n value += rt / c\n } else {\n value += rt * Math.pow(2, 1 - eBias)\n }\n if (value * c >= 2) {\n e++\n c /= 2\n }\n\n if (e + eBias >= eMax) {\n m = 0\n e = eMax\n } else if (e + eBias >= 1) {\n m = ((value * c) - 1) * Math.pow(2, mLen)\n e = e + eBias\n } else {\n m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)\n e = 0\n }\n }\n\n for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}\n\n e = (e << mLen) | m\n eLen += mLen\n for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}\n\n buffer[offset + i - d] |= s * 128\n}\n","'use strict';\n\nmodule.exports = Pbf;\n\nvar ieee754 = require('ieee754');\n\nfunction Pbf(buf) {\n this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);\n this.pos = 0;\n this.type = 0;\n this.length = this.buf.length;\n}\n\nPbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum\nPbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64\nPbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields\nPbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32\n\nvar SHIFT_LEFT_32 = (1 << 16) * (1 << 16),\n SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32;\n\nPbf.prototype = {\n\n destroy: function() {\n this.buf = null;\n },\n\n // === READING =================================================================\n\n readFields: function(readField, result, end) {\n end = end || this.length;\n\n while (this.pos < end) {\n var val = this.readVarint(),\n tag = val >> 3,\n startPos = this.pos;\n\n this.type = val & 0x7;\n readField(tag, result, this);\n\n if (this.pos === startPos) this.skip(val);\n }\n return result;\n },\n\n readMessage: function(readField, result) {\n return this.readFields(readField, result, this.readVarint() + this.pos);\n },\n\n readFixed32: function() {\n var val = readUInt32(this.buf, this.pos);\n this.pos += 4;\n return val;\n },\n\n readSFixed32: function() {\n var val = readInt32(this.buf, this.pos);\n this.pos += 4;\n return val;\n },\n\n // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)\n\n readFixed64: function() {\n var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;\n this.pos += 8;\n return val;\n },\n\n readSFixed64: function() {\n var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;\n this.pos += 8;\n return val;\n },\n\n readFloat: function() {\n var val = ieee754.read(this.buf, this.pos, true, 23, 4);\n this.pos += 4;\n return val;\n },\n\n readDouble: function() {\n var val = ieee754.read(this.buf, this.pos, true, 52, 8);\n this.pos += 8;\n return val;\n },\n\n readVarint: function(isSigned) {\n var buf = this.buf,\n val, b;\n\n b = buf[this.pos++]; val = b & 0x7f; if (b < 0x80) return val;\n b = buf[this.pos++]; val |= (b & 0x7f) << 7; if (b < 0x80) return val;\n b = buf[this.pos++]; val |= (b & 0x7f) << 14; if (b < 0x80) return val;\n b = buf[this.pos++]; val |= (b & 0x7f) << 21; if (b < 0x80) return val;\n b = buf[this.pos]; val |= (b & 0x0f) << 28;\n\n return readVarintRemainder(val, isSigned, this);\n },\n\n readVarint64: function() { // for compatibility with v2.0.1\n return this.readVarint(true);\n },\n\n readSVarint: function() {\n var num = this.readVarint();\n return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding\n },\n\n readBoolean: function() {\n return Boolean(this.readVarint());\n },\n\n readString: function() {\n var end = this.readVarint() + this.pos,\n str = readUtf8(this.buf, this.pos, end);\n this.pos = end;\n return str;\n },\n\n readBytes: function() {\n var end = this.readVarint() + this.pos,\n buffer = this.buf.subarray(this.pos, end);\n this.pos = end;\n return buffer;\n },\n\n // verbose for performance reasons; doesn't affect gzipped size\n\n readPackedVarint: function(arr, isSigned) {\n var end = readPackedEnd(this);\n arr = arr || [];\n while (this.pos < end) arr.push(this.readVarint(isSigned));\n return arr;\n },\n readPackedSVarint: function(arr) {\n var end = readPackedEnd(this);\n arr = arr || [];\n while (this.pos < end) arr.push(this.readSVarint());\n return arr;\n },\n readPackedBoolean: function(arr) {\n var end = readPackedEnd(this);\n arr = arr || [];\n while (this.pos < end) arr.push(this.readBoolean());\n return arr;\n },\n readPackedFloat: function(arr) {\n var end = readPackedEnd(this);\n arr = arr || [];\n while (this.pos < end) arr.push(this.readFloat());\n return arr;\n },\n readPackedDouble: function(arr) {\n var end = readPackedEnd(this);\n arr = arr || [];\n while (this.pos < end) arr.push(this.readDouble());\n return arr;\n },\n readPackedFixed32: function(arr) {\n var end = readPackedEnd(this);\n arr = arr || [];\n while (this.pos < end) arr.push(this.readFixed32());\n return arr;\n },\n readPackedSFixed32: function(arr) {\n var end = readPackedEnd(this);\n arr = arr || [];\n while (this.pos < end) arr.push(this.readSFixed32());\n return arr;\n },\n readPackedFixed64: function(arr) {\n var end = readPackedEnd(this);\n arr = arr || [];\n while (this.pos < end) arr.push(this.readFixed64());\n return arr;\n },\n readPackedSFixed64: function(arr) {\n var end = readPackedEnd(this);\n arr = arr || [];\n while (this.pos < end) arr.push(this.readSFixed64());\n return arr;\n },\n\n skip: function(val) {\n var type = val & 0x7;\n if (type === Pbf.Varint) while (this.buf[this.pos++] > 0x7f) {}\n else if (type === Pbf.Bytes) this.pos = this.readVarint() + this.pos;\n else if (type === Pbf.Fixed32) this.pos += 4;\n else if (type === Pbf.Fixed64) this.pos += 8;\n else throw new Error('Unimplemented type: ' + type);\n },\n\n // === WRITING =================================================================\n\n writeTag: function(tag, type) {\n this.writeVarint((tag << 3) | type);\n },\n\n realloc: function(min) {\n var length = this.length || 16;\n\n while (length < this.pos + min) length *= 2;\n\n if (length !== this.length) {\n var buf = new Uint8Array(length);\n buf.set(this.buf);\n this.buf = buf;\n this.length = length;\n }\n },\n\n finish: function() {\n this.length = this.pos;\n this.pos = 0;\n return this.buf.subarray(0, this.length);\n },\n\n writeFixed32: function(val) {\n this.realloc(4);\n writeInt32(this.buf, val, this.pos);\n this.pos += 4;\n },\n\n writeSFixed32: function(val) {\n this.realloc(4);\n writeInt32(this.buf, val, this.pos);\n this.pos += 4;\n },\n\n writeFixed64: function(val) {\n this.realloc(8);\n writeInt32(this.buf, val & -1, this.pos);\n writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);\n this.pos += 8;\n },\n\n writeSFixed64: function(val) {\n this.realloc(8);\n writeInt32(this.buf, val & -1, this.pos);\n writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);\n this.pos += 8;\n },\n\n writeVarint: function(val) {\n val = +val || 0;\n\n if (val > 0xfffffff || val < 0) {\n writeBigVarint(val, this);\n return;\n }\n\n this.realloc(4);\n\n this.buf[this.pos++] = val & 0x7f | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) return;\n this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) return;\n this.buf[this.pos++] = ((val >>>= 7) & 0x7f) | (val > 0x7f ? 0x80 : 0); if (val <= 0x7f) return;\n this.buf[this.pos++] = (val >>> 7) & 0x7f;\n },\n\n writeSVarint: function(val) {\n this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);\n },\n\n writeBoolean: function(val) {\n this.writeVarint(Boolean(val));\n },\n\n writeString: function(str) {\n str = String(str);\n this.realloc(str.length * 4);\n\n this.pos++; // reserve 1 byte for short string length\n\n var startPos = this.pos;\n // write the string directly to the buffer and see how much was written\n this.pos = writeUtf8(this.buf, str, this.pos);\n var len = this.pos - startPos;\n\n if (len >= 0x80) makeRoomForExtraLength(startPos, len, this);\n\n // finally, write the message length in the reserved place and restore the position\n this.pos = startPos - 1;\n this.writeVarint(len);\n this.pos += len;\n },\n\n writeFloat: function(val) {\n this.realloc(4);\n ieee754.write(this.buf, val, this.pos, true, 23, 4);\n this.pos += 4;\n },\n\n writeDouble: function(val) {\n this.realloc(8);\n ieee754.write(this.buf, val, this.pos, true, 52, 8);\n this.pos += 8;\n },\n\n writeBytes: function(buffer) {\n var len = buffer.length;\n this.writeVarint(len);\n this.realloc(len);\n for (var i = 0; i < len; i++) this.buf[this.pos++] = buffer[i];\n },\n\n writeRawMessage: function(fn, obj) {\n this.pos++; // reserve 1 byte for short message length\n\n // write the message directly to the buffer and see how much was written\n var startPos = this.pos;\n fn(obj, this);\n var len = this.pos - startPos;\n\n if (len >= 0x80) makeRoomForExtraLength(startPos, len, this);\n\n // finally, write the message length in the reserved place and restore the position\n this.pos = startPos - 1;\n this.writeVarint(len);\n this.pos += len;\n },\n\n writeMessage: function(tag, fn, obj) {\n this.writeTag(tag, Pbf.Bytes);\n this.writeRawMessage(fn, obj);\n },\n\n writePackedVarint: function(tag, arr) { this.writeMessage(tag, writePackedVarint, arr); },\n writePackedSVarint: function(tag, arr) { this.writeMessage(tag, writePackedSVarint, arr); },\n writePackedBoolean: function(tag, arr) { this.writeMessage(tag, writePackedBoolean, arr); },\n writePackedFloat: function(tag, arr) { this.writeMessage(tag, writePackedFloat, arr); },\n writePackedDouble: function(tag, arr) { this.writeMessage(tag, writePackedDouble, arr); },\n writePackedFixed32: function(tag, arr) { this.writeMessage(tag, writePackedFixed32, arr); },\n writePackedSFixed32: function(tag, arr) { this.writeMessage(tag, writePackedSFixed32, arr); },\n writePackedFixed64: function(tag, arr) { this.writeMessage(tag, writePackedFixed64, arr); },\n writePackedSFixed64: function(tag, arr) { this.writeMessage(tag, writePackedSFixed64, arr); },\n\n writeBytesField: function(tag, buffer) {\n this.writeTag(tag, Pbf.Bytes);\n this.writeBytes(buffer);\n },\n writeFixed32Field: function(tag, val) {\n this.writeTag(tag, Pbf.Fixed32);\n this.writeFixed32(val);\n },\n writeSFixed32Field: function(tag, val) {\n this.writeTag(tag, Pbf.Fixed32);\n this.writeSFixed32(val);\n },\n writeFixed64Field: function(tag, val) {\n this.writeTag(tag, Pbf.Fixed64);\n this.writeFixed64(val);\n },\n writeSFixed64Field: function(tag, val) {\n this.writeTag(tag, Pbf.Fixed64);\n this.writeSFixed64(val);\n },\n writeVarintField: function(tag, val) {\n this.writeTag(tag, Pbf.Varint);\n this.writeVarint(val);\n },\n writeSVarintField: function(tag, val) {\n this.writeTag(tag, Pbf.Varint);\n this.writeSVarint(val);\n },\n writeStringField: function(tag, str) {\n this.writeTag(tag, Pbf.Bytes);\n this.writeString(str);\n },\n writeFloatField: function(tag, val) {\n this.writeTag(tag, Pbf.Fixed32);\n this.writeFloat(val);\n },\n writeDoubleField: function(tag, val) {\n this.writeTag(tag, Pbf.Fixed64);\n this.writeDouble(val);\n },\n writeBooleanField: function(tag, val) {\n this.writeVarintField(tag, Boolean(val));\n }\n};\n\nfunction readVarintRemainder(l, s, p) {\n var buf = p.buf,\n h, b;\n\n b = buf[p.pos++]; h = (b & 0x70) >> 4; if (b < 0x80) return toNum(l, h, s);\n b = buf[p.pos++]; h |= (b & 0x7f) << 3; if (b < 0x80) return toNum(l, h, s);\n b = buf[p.pos++]; h |= (b & 0x7f) << 10; if (b < 0x80) return toNum(l, h, s);\n b = buf[p.pos++]; h |= (b & 0x7f) << 17; if (b < 0x80) return toNum(l, h, s);\n b = buf[p.pos++]; h |= (b & 0x7f) << 24; if (b < 0x80) return toNum(l, h, s);\n b = buf[p.pos++]; h |= (b & 0x01) << 31; if (b < 0x80) return toNum(l, h, s);\n\n throw new Error('Expected varint not more than 10 bytes');\n}\n\nfunction readPackedEnd(pbf) {\n return pbf.type === Pbf.Bytes ?\n pbf.readVarint() + pbf.pos : pbf.pos + 1;\n}\n\nfunction toNum(low, high, isSigned) {\n if (isSigned) {\n return high * 0x100000000 + (low >>> 0);\n }\n\n return ((high >>> 0) * 0x100000000) + (low >>> 0);\n}\n\nfunction writeBigVarint(val, pbf) {\n var low, high;\n\n if (val >= 0) {\n low = (val % 0x100000000) | 0;\n high = (val / 0x100000000) | 0;\n } else {\n low = ~(-val % 0x100000000);\n high = ~(-val / 0x100000000);\n\n if (low ^ 0xffffffff) {\n low = (low + 1) | 0;\n } else {\n low = 0;\n high = (high + 1) | 0;\n }\n }\n\n if (val >= 0x10000000000000000 || val < -0x10000000000000000) {\n throw new Error('Given varint doesn\\'t fit into 10 bytes');\n }\n\n pbf.realloc(10);\n\n writeBigVarintLow(low, high, pbf);\n writeBigVarintHigh(high, pbf);\n}\n\nfunction writeBigVarintLow(low, high, pbf) {\n pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;\n pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;\n pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;\n pbf.buf[pbf.pos++] = low & 0x7f | 0x80; low >>>= 7;\n pbf.buf[pbf.pos] = low & 0x7f;\n}\n\nfunction writeBigVarintHigh(high, pbf) {\n var lsb = (high & 0x07) << 4;\n\n pbf.buf[pbf.pos++] |= lsb | ((high >>>= 3) ? 0x80 : 0); if (!high) return;\n pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) return;\n pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) return;\n pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) return;\n pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0); if (!high) return;\n pbf.buf[pbf.pos++] = high & 0x7f;\n}\n\nfunction makeRoomForExtraLength(startPos, len, pbf) {\n var extraLen =\n len <= 0x3fff ? 1 :\n len <= 0x1fffff ? 2 :\n len <= 0xfffffff ? 3 : Math.ceil(Math.log(len) / (Math.LN2 * 7));\n\n // if 1 byte isn't enough for encoding message length, shift the data to the right\n pbf.realloc(extraLen);\n for (var i = pbf.pos - 1; i >= startPos; i--) pbf.buf[i + extraLen] = pbf.buf[i];\n}\n\nfunction writePackedVarint(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeVarint(arr[i]); }\nfunction writePackedSVarint(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeSVarint(arr[i]); }\nfunction writePackedFloat(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeFloat(arr[i]); }\nfunction writePackedDouble(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeDouble(arr[i]); }\nfunction writePackedBoolean(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeBoolean(arr[i]); }\nfunction writePackedFixed32(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeFixed32(arr[i]); }\nfunction writePackedSFixed32(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeSFixed32(arr[i]); }\nfunction writePackedFixed64(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeFixed64(arr[i]); }\nfunction writePackedSFixed64(arr, pbf) { for (var i = 0; i < arr.length; i++) pbf.writeSFixed64(arr[i]); }\n\n// Buffer code below from https://github.com/feross/buffer, MIT-licensed\n\nfunction readUInt32(buf, pos) {\n return ((buf[pos]) |\n (buf[pos + 1] << 8) |\n (buf[pos + 2] << 16)) +\n (buf[pos + 3] * 0x1000000);\n}\n\nfunction writeInt32(buf, val, pos) {\n buf[pos] = val;\n buf[pos + 1] = (val >>> 8);\n buf[pos + 2] = (val >>> 16);\n buf[pos + 3] = (val >>> 24);\n}\n\nfunction readInt32(buf, pos) {\n return ((buf[pos]) |\n (buf[pos + 1] << 8) |\n (buf[pos + 2] << 16)) +\n (buf[pos + 3] << 24);\n}\n\nfunction readUtf8(buf, pos, end) {\n var str = '';\n var i = pos;\n\n while (i < end) {\n var b0 = buf[i];\n var c = null; // codepoint\n var bytesPerSequence =\n b0 > 0xEF ? 4 :\n b0 > 0xDF ? 3 :\n b0 > 0xBF ? 2 : 1;\n\n if (i + bytesPerSequence > end) break;\n\n var b1, b2, b3;\n\n if (bytesPerSequence === 1) {\n if (b0 < 0x80) {\n c = b0;\n }\n } else if (bytesPerSequence === 2) {\n b1 = buf[i + 1];\n if ((b1 & 0xC0) === 0x80) {\n c = (b0 & 0x1F) << 0x6 | (b1 & 0x3F);\n if (c <= 0x7F) {\n c = null;\n }\n }\n } else if (bytesPerSequence === 3) {\n b1 = buf[i + 1];\n b2 = buf[i + 2];\n if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {\n c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | (b2 & 0x3F);\n if (c <= 0x7FF || (c >= 0xD800 && c <= 0xDFFF)) {\n c = null;\n }\n }\n } else if (bytesPerSequence === 4) {\n b1 = buf[i + 1];\n b2 = buf[i + 2];\n b3 = buf[i + 3];\n if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {\n c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | (b3 & 0x3F);\n if (c <= 0xFFFF || c >= 0x110000) {\n c = null;\n }\n }\n }\n\n if (c === null) {\n c = 0xFFFD;\n bytesPerSequence = 1;\n\n } else if (c > 0xFFFF) {\n c -= 0x10000;\n str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);\n c = 0xDC00 | c & 0x3FF;\n }\n\n str += String.fromCharCode(c);\n i += bytesPerSequence;\n }\n\n return str;\n}\n\nfunction writeUtf8(buf, str, pos) {\n for (var i = 0, c, lead; i < str.length; i++) {\n c = str.charCodeAt(i); // code point\n\n if (c > 0xD7FF && c < 0xE000) {\n if (lead) {\n if (c < 0xDC00) {\n buf[pos++] = 0xEF;\n buf[pos++] = 0xBF;\n buf[pos++] = 0xBD;\n lead = c;\n continue;\n } else {\n c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;\n lead = null;\n }\n } else {\n if (c > 0xDBFF || (i + 1 === str.length)) {\n buf[pos++] = 0xEF;\n buf[pos++] = 0xBF;\n buf[pos++] = 0xBD;\n } else {\n lead = c;\n }\n continue;\n }\n } else if (lead) {\n buf[pos++] = 0xEF;\n buf[pos++] = 0xBF;\n buf[pos++] = 0xBD;\n lead = null;\n }\n\n if (c < 0x80) {\n buf[pos++] = c;\n } else {\n if (c < 0x800) {\n buf[pos++] = c >> 0x6 | 0xC0;\n } else {\n if (c < 0x10000) {\n buf[pos++] = c >> 0xC | 0xE0;\n } else {\n buf[pos++] = c >> 0x12 | 0xF0;\n buf[pos++] = c >> 0xC & 0x3F | 0x80;\n }\n buf[pos++] = c >> 0x6 & 0x3F | 0x80;\n }\n buf[pos++] = c & 0x3F | 0x80;\n }\n }\n return pos;\n}\n","/**\n * @module ol/render/Feature\n */\nimport {UNDEFINED} from '../functions.js';\nimport {extend} from '../array.js';\nimport {createOrUpdateFromCoordinate, createOrUpdateFromFlatCoordinates, getCenter, getHeight} from '../extent.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport {linearRingss as linearRingssCenter} from '../geom/flat/center.js';\nimport {getInteriorPointOfArray, getInteriorPointsOfMultiArray} from '../geom/flat/interiorpoint.js';\nimport {interpolatePoint} from '../geom/flat/interpolate.js';\nimport {get as getProjection} from '../proj.js';\nimport {transform2D} from '../geom/flat/transform.js';\nimport {create as createTransform, compose as composeTransform} from '../transform.js';\n\n/**\n * Lightweight, read-only, {@link module:ol/Feature~Feature} and {@link module:ol/geom/Geometry~Geometry} like\n * structure, optimized for vector tile rendering and styling. Geometry access\n * through the API is limited to getting the type and extent of the geometry.\n *\n * @constructor\n * @param {module:ol/geom/GeometryType} type Geometry type.\n * @param {Array.<number>} flatCoordinates Flat coordinates. These always need\n * to be right-handed for polygons.\n * @param {Array.<number>|Array.<Array.<number>>} ends Ends or Endss.\n * @param {Object.<string, *>} properties Properties.\n * @param {number|string|undefined} id Feature id.\n */\nconst RenderFeature = function(type, flatCoordinates, ends, properties, id) {\n /**\n * @private\n * @type {module:ol/extent~Extent|undefined}\n */\n this.extent_;\n\n /**\n * @private\n * @type {number|string|undefined}\n */\n this.id_ = id;\n\n /**\n * @private\n * @type {module:ol/geom/GeometryType}\n */\n this.type_ = type;\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.flatCoordinates_ = flatCoordinates;\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.flatInteriorPoints_ = null;\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.flatMidpoints_ = null;\n\n /**\n * @private\n * @type {Array.<number>|Array.<Array.<number>>}\n */\n this.ends_ = ends;\n\n /**\n * @private\n * @type {Object.<string, *>}\n */\n this.properties_ = properties;\n\n};\n\n\n/**\n * @type {module:ol/transform~Transform}\n */\nconst tmpTransform = createTransform();\n\n\n/**\n * Get a feature property by its key.\n * @param {string} key Key\n * @return {*} Value for the requested key.\n * @api\n */\nRenderFeature.prototype.get = function(key) {\n return this.properties_[key];\n};\n\n\n/**\n * @return {Array.<number>|Array.<Array.<number>>} Ends or endss.\n */\nRenderFeature.prototype.getEnds =\nRenderFeature.prototype.getEndss = function() {\n return this.ends_;\n};\n\n\n/**\n * Get the extent of this feature's geometry.\n * @return {module:ol/extent~Extent} Extent.\n * @api\n */\nRenderFeature.prototype.getExtent = function() {\n if (!this.extent_) {\n this.extent_ = this.type_ === GeometryType.POINT ?\n createOrUpdateFromCoordinate(this.flatCoordinates_) :\n createOrUpdateFromFlatCoordinates(\n this.flatCoordinates_, 0, this.flatCoordinates_.length, 2);\n\n }\n return this.extent_;\n};\n\n\n/**\n * @return {Array.<number>} Flat interior points.\n */\nRenderFeature.prototype.getFlatInteriorPoint = function() {\n if (!this.flatInteriorPoints_) {\n const flatCenter = getCenter(this.getExtent());\n this.flatInteriorPoints_ = getInteriorPointOfArray(\n this.flatCoordinates_, 0, this.ends_, 2, flatCenter, 0);\n }\n return this.flatInteriorPoints_;\n};\n\n\n/**\n * @return {Array.<number>} Flat interior points.\n */\nRenderFeature.prototype.getFlatInteriorPoints = function() {\n if (!this.flatInteriorPoints_) {\n const flatCenters = linearRingssCenter(\n this.flatCoordinates_, 0, this.ends_, 2);\n this.flatInteriorPoints_ = getInteriorPointsOfMultiArray(\n this.flatCoordinates_, 0, this.ends_, 2, flatCenters);\n }\n return this.flatInteriorPoints_;\n};\n\n\n/**\n * @return {Array.<number>} Flat midpoint.\n */\nRenderFeature.prototype.getFlatMidpoint = function() {\n if (!this.flatMidpoints_) {\n this.flatMidpoints_ = interpolatePoint(\n this.flatCoordinates_, 0, this.flatCoordinates_.length, 2, 0.5);\n }\n return this.flatMidpoints_;\n};\n\n\n/**\n * @return {Array.<number>} Flat midpoints.\n */\nRenderFeature.prototype.getFlatMidpoints = function() {\n if (!this.flatMidpoints_) {\n this.flatMidpoints_ = [];\n const flatCoordinates = this.flatCoordinates_;\n let offset = 0;\n const ends = this.ends_;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n const midpoint = interpolatePoint(\n flatCoordinates, offset, end, 2, 0.5);\n extend(this.flatMidpoints_, midpoint);\n offset = end;\n }\n }\n return this.flatMidpoints_;\n};\n\n/**\n * Get the feature identifier. This is a stable identifier for the feature and\n * is set when reading data from a remote source.\n * @return {number|string|undefined} Id.\n * @api\n */\nRenderFeature.prototype.getId = function() {\n return this.id_;\n};\n\n\n/**\n * @return {Array.<number>} Flat coordinates.\n */\nRenderFeature.prototype.getOrientedFlatCoordinates = function() {\n return this.flatCoordinates_;\n};\n\n\n/**\n * @return {Array.<number>} Flat coordinates.\n */\nRenderFeature.prototype.getFlatCoordinates =\n RenderFeature.prototype.getOrientedFlatCoordinates;\n\n\n/**\n * For API compatibility with {@link module:ol/Feature~Feature}, this method is useful when\n * determining the geometry type in style function (see {@link #getType}).\n * @return {module:ol/render/Feature} Feature.\n * @api\n */\nRenderFeature.prototype.getGeometry = function() {\n return this;\n};\n\n\n/**\n * Get the feature properties.\n * @return {Object.<string, *>} Feature properties.\n * @api\n */\nRenderFeature.prototype.getProperties = function() {\n return this.properties_;\n};\n\n\n/**\n * Get the feature for working with its geometry.\n * @return {module:ol/render/Feature} Feature.\n */\nRenderFeature.prototype.getSimplifiedGeometry =\n RenderFeature.prototype.getGeometry;\n\n\n/**\n * @return {number} Stride.\n */\nRenderFeature.prototype.getStride = function() {\n return 2;\n};\n\n\n/**\n * @return {undefined}\n */\nRenderFeature.prototype.getStyleFunction = UNDEFINED;\n\n\n/**\n * Get the type of this feature's geometry.\n * @return {module:ol/geom/GeometryType} Geometry type.\n * @api\n */\nRenderFeature.prototype.getType = function() {\n return this.type_;\n};\n\n/**\n * Transform geometry coordinates from tile pixel space to projected.\n * The SRS of the source and destination are expected to be the same.\n *\n * @param {module:ol/proj~ProjectionLike} source The current projection\n * @param {module:ol/proj~ProjectionLike} destination The desired projection.\n */\nRenderFeature.prototype.transform = function(source, destination) {\n source = getProjection(source);\n const pixelExtent = source.getExtent();\n const projectedExtent = source.getWorldExtent();\n const scale = getHeight(projectedExtent) / getHeight(pixelExtent);\n composeTransform(tmpTransform,\n projectedExtent[0], projectedExtent[3],\n scale, -scale, 0,\n 0, 0);\n transform2D(this.flatCoordinates_, 0, this.flatCoordinates_.length, 2,\n tmpTransform, this.flatCoordinates_);\n};\nexport default RenderFeature;\n","/**\n * @module ol/format/MVT\n */\n//FIXME Implement projection handling\n\nimport {inherits} from '../util.js';\nimport {assert} from '../asserts.js';\nimport PBF from 'pbf';\nimport FeatureFormat, {transformWithOptions} from '../format/Feature.js';\nimport FormatType from '../format/FormatType.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {linearRingIsClockwise} from '../geom/flat/orient.js';\nimport Projection from '../proj/Projection.js';\nimport Units from '../proj/Units.js';\nimport RenderFeature from '../render/Feature.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {function((module:ol/geom/Geometry|Object.<string,*>)=)|function(module:ol/geom/GeometryType,Array.<number>,(Array.<number>|Array.<Array.<number>>),Object.<string,*>,number)} [featureClass]\n * Class for features returned by {@link module:ol/format/MVT#readFeatures}. Set to\n * {@link module:ol/Feature~Feature} to get full editing and geometry support at the cost of\n * decreased rendering performance. The default is {@link module:ol/render/Feature~RenderFeature},\n * which is optimized for rendering and hit detection.\n * @property {string} [geometryName='geometry'] Geometry name to use when creating\n * features.\n * @property {string} [layerName='layer'] Name of the feature attribute that\n * holds the layer name.\n * @property {Array.<string>} [layers] Layers to read features from. If not\n * provided, features will be read from all layers.\n */\n\n\n/**\n * @classdesc\n * Feature format for reading data in the Mapbox MVT format.\n *\n * @constructor\n * @extends {module:ol/format/Feature}\n * @param {module:ol/format/MVT~Options=} opt_options Options.\n * @api\n */\nconst MVT = function(opt_options) {\n\n FeatureFormat.call(this);\n\n const options = opt_options ? opt_options : {};\n\n /**\n * @type {module:ol/proj/Projection}\n */\n this.dataProjection = new Projection({\n code: '',\n units: Units.TILE_PIXELS\n });\n\n /**\n * @private\n * @type {function((module:ol/geom/Geometry|Object.<string,*>)=)|\n * function(module:ol/geom/GeometryType,Array.<number>,\n * (Array.<number>|Array.<Array.<number>>),Object.<string,*>,number)}\n */\n this.featureClass_ = options.featureClass ?\n options.featureClass : RenderFeature;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.geometryName_ = options.geometryName;\n\n /**\n * @private\n * @type {string}\n */\n this.layerName_ = options.layerName ? options.layerName : 'layer';\n\n /**\n * @private\n * @type {Array.<string>}\n */\n this.layers_ = options.layers ? options.layers : null;\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.extent_ = null;\n\n};\n\ninherits(MVT, FeatureFormat);\n\n\n/**\n * Reader callback for parsing layers.\n * @param {number} tag The tag.\n * @param {Object} layers The layers object.\n * @param {Object} pbf The PBF.\n */\nfunction layersPBFReader(tag, layers, pbf) {\n if (tag === 3) {\n const layer = {\n keys: [],\n values: [],\n features: []\n };\n const end = pbf.readVarint() + pbf.pos;\n pbf.readFields(layerPBFReader, layer, end);\n layer.length = layer.features.length;\n if (layer.length) {\n layers[layer.name] = layer;\n }\n }\n}\n\n/**\n * Reader callback for parsing layer.\n * @param {number} tag The tag.\n * @param {Object} layer The layer object.\n * @param {Object} pbf The PBF.\n */\nfunction layerPBFReader(tag, layer, pbf) {\n if (tag === 15) {\n layer.version = pbf.readVarint();\n } else if (tag === 1) {\n layer.name = pbf.readString();\n } else if (tag === 5) {\n layer.extent = pbf.readVarint();\n } else if (tag === 2) {\n layer.features.push(pbf.pos);\n } else if (tag === 3) {\n layer.keys.push(pbf.readString());\n } else if (tag === 4) {\n let value = null;\n const end = pbf.readVarint() + pbf.pos;\n while (pbf.pos < end) {\n tag = pbf.readVarint() >> 3;\n value = tag === 1 ? pbf.readString() :\n tag === 2 ? pbf.readFloat() :\n tag === 3 ? pbf.readDouble() :\n tag === 4 ? pbf.readVarint64() :\n tag === 5 ? pbf.readVarint() :\n tag === 6 ? pbf.readSVarint() :\n tag === 7 ? pbf.readBoolean() : null;\n }\n layer.values.push(value);\n }\n}\n\n/**\n * Reader callback for parsing feature.\n * @param {number} tag The tag.\n * @param {Object} feature The feature object.\n * @param {Object} pbf The PBF.\n */\nfunction featurePBFReader(tag, feature, pbf) {\n if (tag == 1) {\n feature.id = pbf.readVarint();\n } else if (tag == 2) {\n const end = pbf.readVarint() + pbf.pos;\n while (pbf.pos < end) {\n const key = feature.layer.keys[pbf.readVarint()];\n const value = feature.layer.values[pbf.readVarint()];\n feature.properties[key] = value;\n }\n } else if (tag == 3) {\n feature.type = pbf.readVarint();\n } else if (tag == 4) {\n feature.geometry = pbf.pos;\n }\n}\n\n\n/**\n * Read a raw feature from the pbf offset stored at index `i` in the raw layer.\n * @suppress {missingProperties}\n * @param {Object} pbf PBF.\n * @param {Object} layer Raw layer.\n * @param {number} i Index of the feature in the raw layer's `features` array.\n * @return {Object} Raw feature.\n */\nfunction readRawFeature(pbf, layer, i) {\n pbf.pos = layer.features[i];\n const end = pbf.readVarint() + pbf.pos;\n\n const feature = {\n layer: layer,\n type: 0,\n properties: {}\n };\n pbf.readFields(featurePBFReader, feature, end);\n return feature;\n}\n\n\n/**\n * Read the raw geometry from the pbf offset stored in a raw feature's geometry\n * property.\n * @suppress {missingProperties}\n * @param {Object} pbf PBF.\n * @param {Object} feature Raw feature.\n * @param {Array.<number>} flatCoordinates Array to store flat coordinates in.\n * @param {Array.<number>} ends Array to store ends in.\n * @private\n */\nMVT.prototype.readRawGeometry_ = function(pbf, feature, flatCoordinates, ends) {\n pbf.pos = feature.geometry;\n\n const end = pbf.readVarint() + pbf.pos;\n let cmd = 1;\n let length = 0;\n let x = 0;\n let y = 0;\n let coordsLen = 0;\n let currentEnd = 0;\n\n while (pbf.pos < end) {\n if (!length) {\n const cmdLen = pbf.readVarint();\n cmd = cmdLen & 0x7;\n length = cmdLen >> 3;\n }\n\n length--;\n\n if (cmd === 1 || cmd === 2) {\n x += pbf.readSVarint();\n y += pbf.readSVarint();\n\n if (cmd === 1) { // moveTo\n if (coordsLen > currentEnd) {\n ends.push(coordsLen);\n currentEnd = coordsLen;\n }\n }\n\n flatCoordinates.push(x, y);\n coordsLen += 2;\n\n } else if (cmd === 7) {\n\n if (coordsLen > currentEnd) {\n // close polygon\n flatCoordinates.push(\n flatCoordinates[currentEnd], flatCoordinates[currentEnd + 1]);\n coordsLen += 2;\n }\n\n } else {\n assert(false, 59); // Invalid command found in the PBF\n }\n }\n\n if (coordsLen > currentEnd) {\n ends.push(coordsLen);\n currentEnd = coordsLen;\n }\n\n};\n\n\n/**\n * @suppress {missingProperties}\n * @param {number} type The raw feature's geometry type\n * @param {number} numEnds Number of ends of the flat coordinates of the\n * geometry.\n * @return {module:ol/geom/GeometryType} The geometry type.\n */\nfunction getGeometryType(type, numEnds) {\n /** @type {module:ol/geom/GeometryType} */\n let geometryType;\n if (type === 1) {\n geometryType = numEnds === 1 ?\n GeometryType.POINT : GeometryType.MULTI_POINT;\n } else if (type === 2) {\n geometryType = numEnds === 1 ?\n GeometryType.LINE_STRING :\n GeometryType.MULTI_LINE_STRING;\n } else if (type === 3) {\n geometryType = GeometryType.POLYGON;\n // MultiPolygon not relevant for rendering - winding order determines\n // outer rings of polygons.\n }\n return geometryType;\n}\n\n/**\n * @private\n * @param {Object} pbf PBF\n * @param {Object} rawFeature Raw Mapbox feature.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/Feature|module:ol/render/Feature} Feature.\n */\nMVT.prototype.createFeature_ = function(pbf, rawFeature, opt_options) {\n const type = rawFeature.type;\n if (type === 0) {\n return null;\n }\n\n let feature;\n const id = rawFeature.id;\n const values = rawFeature.properties;\n values[this.layerName_] = rawFeature.layer.name;\n\n const flatCoordinates = [];\n let ends = [];\n this.readRawGeometry_(pbf, rawFeature, flatCoordinates, ends);\n\n const geometryType = getGeometryType(type, ends.length);\n\n if (this.featureClass_ === RenderFeature) {\n feature = new this.featureClass_(geometryType, flatCoordinates, ends, values, id);\n } else {\n let geom;\n if (geometryType == GeometryType.POLYGON) {\n const endss = [];\n let offset = 0;\n let prevEndIndex = 0;\n for (let i = 0, ii = ends.length; i < ii; ++i) {\n const end = ends[i];\n if (!linearRingIsClockwise(flatCoordinates, offset, end, 2)) {\n endss.push(ends.slice(prevEndIndex, i));\n prevEndIndex = i;\n }\n offset = end;\n }\n if (endss.length > 1) {\n ends = endss;\n geom = new MultiPolygon(null);\n } else {\n geom = new Polygon(null);\n }\n } else {\n geom = geometryType === GeometryType.POINT ? new Point(null) :\n geometryType === GeometryType.LINE_STRING ? new LineString(null) :\n geometryType === GeometryType.POLYGON ? new Polygon(null) :\n geometryType === GeometryType.MULTI_POINT ? new MultiPoint (null) :\n geometryType === GeometryType.MULTI_LINE_STRING ? new MultiLineString(null) :\n null;\n }\n geom.setFlatCoordinates(GeometryLayout.XY, flatCoordinates, ends);\n feature = new this.featureClass_();\n if (this.geometryName_) {\n feature.setGeometryName(this.geometryName_);\n }\n const geometry = transformWithOptions(geom, false, this.adaptOptions(opt_options));\n feature.setGeometry(geometry);\n feature.setId(id);\n feature.setProperties(values);\n }\n\n return feature;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nMVT.prototype.getLastExtent = function() {\n return this.extent_;\n};\n\n\n/**\n * @inheritDoc\n */\nMVT.prototype.getType = function() {\n return FormatType.ARRAY_BUFFER;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nMVT.prototype.readFeatures = function(source, opt_options) {\n const layers = this.layers_;\n\n const pbf = new PBF(/** @type {ArrayBuffer} */ (source));\n const pbfLayers = pbf.readFields(layersPBFReader, {});\n /** @type {Array.<module:ol/Feature|module:ol/render/Feature>} */\n const features = [];\n for (const name in pbfLayers) {\n if (layers && layers.indexOf(name) == -1) {\n continue;\n }\n const pbfLayer = pbfLayers[name];\n\n for (let i = 0, ii = pbfLayer.length; i < ii; ++i) {\n const rawFeature = readRawFeature(pbf, pbfLayer, i);\n features.push(this.createFeature_(pbf, rawFeature));\n }\n this.extent_ = pbfLayer ? [0, 0, pbfLayer.extent, pbfLayer.extent] : null;\n }\n\n return features;\n};\n\n\n/**\n * @inheritDoc\n * @api\n */\nMVT.prototype.readProjection = function(source) {\n return this.dataProjection;\n};\n\n\n/**\n * Sets the layers that features will be read from.\n * @param {Array.<string>} layers Layers.\n * @api\n */\nMVT.prototype.setLayers = function(layers) {\n this.layers_ = layers;\n};\n\n\n/**\n * Not implemented.\n * @override\n */\nMVT.prototype.readFeature = function() {};\n\n\n/**\n * Not implemented.\n * @override\n */\nMVT.prototype.readGeometry = function() {};\n\n\n/**\n * Not implemented.\n * @override\n */\nMVT.prototype.writeFeature = function() {};\n\n\n/**\n * Not implemented.\n * @override\n */\nMVT.prototype.writeGeometry = function() {};\n\n\n/**\n * Not implemented.\n * @override\n */\nMVT.prototype.writeFeatures = function() {};\nexport default MVT;\n","/**\n * @module ol/format/OSMXML\n */\n// FIXME add typedef for stack state objects\nimport {inherits} from '../util.js';\nimport {extend} from '../array.js';\nimport Feature from '../Feature.js';\nimport {transformWithOptions} from '../format/Feature.js';\nimport XMLFeature from '../format/XMLFeature.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport LineString from '../geom/LineString.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {isEmpty} from '../obj.js';\nimport {get as getProjection} from '../proj.js';\nimport {pushParseAndPop, makeStructureNS} from '../xml.js';\n\n/**\n * @classdesc\n * Feature format for reading data in the\n * [OSMXML format](http://wiki.openstreetmap.org/wiki/OSM_XML).\n *\n * @constructor\n * @extends {module:ol/format/XMLFeature}\n * @api\n */\nconst OSMXML = function() {\n XMLFeature.call(this);\n\n /**\n * @inheritDoc\n */\n this.dataProjection = getProjection('EPSG:4326');\n};\n\ninherits(OSMXML, XMLFeature);\n\n\n/**\n * @const\n * @type {Array.<null>}\n */\nconst NAMESPACE_URIS = [null];\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst WAY_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'nd': readNd,\n 'tag': readTag\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'node': readNode,\n 'way': readWay\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst NODE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'tag': readTag\n });\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction readNode(node, objectStack) {\n const options = /** @type {module:ol/format/Feature~ReadOptions} */ (objectStack[0]);\n const state = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n const id = node.getAttribute('id');\n /** @type {module:ol/coordinate~Coordinate} */\n const coordinates = [\n parseFloat(node.getAttribute('lon')),\n parseFloat(node.getAttribute('lat'))\n ];\n state.nodes[id] = coordinates;\n\n const values = pushParseAndPop({\n tags: {}\n }, NODE_PARSERS, node, objectStack);\n if (!isEmpty(values.tags)) {\n const geometry = new Point(coordinates);\n transformWithOptions(geometry, false, options);\n const feature = new Feature(geometry);\n feature.setId(id);\n feature.setProperties(values.tags);\n state.features.push(feature);\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction readWay(node, objectStack) {\n const id = node.getAttribute('id');\n const values = pushParseAndPop({\n id: id,\n ndrefs: [],\n tags: {}\n }, WAY_PARSERS, node, objectStack);\n const state = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n state.ways.push(values);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction readNd(node, objectStack) {\n const values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n values.ndrefs.push(node.getAttribute('ref'));\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction readTag(node, objectStack) {\n const values = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n values.tags[node.getAttribute('k')] = node.getAttribute('v');\n}\n\n\n/**\n * Read all features from an OSM source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nOSMXML.prototype.readFeatures;\n\n\n/**\n * @inheritDoc\n */\nOSMXML.prototype.readFeaturesFromNode = function(node, opt_options) {\n const options = this.getReadOptions(node, opt_options);\n if (node.localName == 'osm') {\n const state = pushParseAndPop({\n nodes: {},\n ways: [],\n features: []\n }, PARSERS, node, [options]);\n // parse nodes in ways\n for (let j = 0; j < state.ways.length; j++) {\n const values = /** @type {Object} */ (state.ways[j]);\n /** @type {Array.<number>} */\n const flatCoordinates = [];\n for (let i = 0, ii = values.ndrefs.length; i < ii; i++) {\n const point = state.nodes[values.ndrefs[i]];\n extend(flatCoordinates, point);\n }\n let geometry;\n if (values.ndrefs[0] == values.ndrefs[values.ndrefs.length - 1]) {\n // closed way\n geometry = new Polygon(null);\n geometry.setFlatCoordinates(GeometryLayout.XY, flatCoordinates,\n [flatCoordinates.length]);\n } else {\n geometry = new LineString(null);\n geometry.setFlatCoordinates(GeometryLayout.XY, flatCoordinates);\n }\n transformWithOptions(geometry, false, options);\n const feature = new Feature(geometry);\n feature.setId(values.id);\n feature.setProperties(values.tags);\n state.features.push(feature);\n }\n if (state.features) {\n return state.features;\n }\n }\n return [];\n};\n\n\n/**\n * Read the projection from an OSM source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @return {module:ol/proj/Projection} Projection.\n * @api\n */\nOSMXML.prototype.readProjection;\n\n\n/**\n * Not implemented.\n * @inheritDoc\n */\nOSMXML.prototype.writeFeatureNode = function(feature, opt_options) {};\n\n\n/**\n * Not implemented.\n * @inheritDoc\n */\nOSMXML.prototype.writeFeaturesNode = function(features, opt_options) {};\n\n\n/**\n * Not implemented.\n * @inheritDoc\n */\nOSMXML.prototype.writeGeometryNode = function(geometry, opt_options) {};\nexport default OSMXML;\n","/**\n * @module ol/geom/flat/flip\n */\n\n\n/**\n * @param {Array.<number>} flatCoordinates Flat coordinates.\n * @param {number} offset Offset.\n * @param {number} end End.\n * @param {number} stride Stride.\n * @param {Array.<number>=} opt_dest Destination.\n * @param {number=} opt_destOffset Destination offset.\n * @return {Array.<number>} Flat coordinates.\n */\nexport function flipXY(flatCoordinates, offset, end, stride, opt_dest, opt_destOffset) {\n let dest, destOffset;\n if (opt_dest !== undefined) {\n dest = opt_dest;\n destOffset = opt_destOffset !== undefined ? opt_destOffset : 0;\n } else {\n dest = [];\n destOffset = 0;\n }\n let j = offset;\n while (j < end) {\n const x = flatCoordinates[j++];\n dest[destOffset++] = flatCoordinates[j++];\n dest[destOffset++] = x;\n for (let k = 2; k < stride; ++k) {\n dest[destOffset++] = flatCoordinates[j++];\n }\n }\n dest.length = destOffset;\n return dest;\n}\n","/**\n * @module ol/format/Polyline\n */\nimport {inherits} from '../util.js';\nimport {assert} from '../asserts.js';\nimport Feature from '../Feature.js';\nimport {transformWithOptions} from '../format/Feature.js';\nimport TextFeature from '../format/TextFeature.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport LineString from '../geom/LineString.js';\nimport {getStrideForLayout} from '../geom/SimpleGeometry.js';\nimport {flipXY} from '../geom/flat/flip.js';\nimport {inflateCoordinates} from '../geom/flat/inflate.js';\nimport {get as getProjection} from '../proj.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [factor=1e5] The factor by which the coordinates values will be scaled.\n * @property {module:ol/geom/GeometryLayout} [geometryLayout='XY'] Layout of the\n * feature geometries created by the format reader.\n */\n\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the Encoded\n * Polyline Algorithm Format.\n *\n * @constructor\n * @extends {module:ol/format/TextFeature}\n * @param {module:ol/format/Polyline~Options=} opt_options Optional configuration object.\n * @api\n */\nconst Polyline = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n TextFeature.call(this);\n\n /**\n * @inheritDoc\n */\n this.dataProjection = getProjection('EPSG:4326');\n\n /**\n * @private\n * @type {number}\n */\n this.factor_ = options.factor ? options.factor : 1e5;\n\n /**\n * @private\n * @type {module:ol/geom/GeometryLayout}\n */\n this.geometryLayout_ = options.geometryLayout ?\n options.geometryLayout : GeometryLayout.XY;\n};\n\ninherits(Polyline, TextFeature);\n\n\n/**\n * Encode a list of n-dimensional points and return an encoded string\n *\n * Attention: This function will modify the passed array!\n *\n * @param {Array.<number>} numbers A list of n-dimensional points.\n * @param {number} stride The number of dimension of the points in the list.\n * @param {number=} opt_factor The factor by which the numbers will be\n * multiplied. The remaining decimal places will get rounded away.\n * Default is `1e5`.\n * @return {string} The encoded string.\n * @api\n */\nexport function encodeDeltas(numbers, stride, opt_factor) {\n const factor = opt_factor ? opt_factor : 1e5;\n let d;\n\n const lastNumbers = new Array(stride);\n for (d = 0; d < stride; ++d) {\n lastNumbers[d] = 0;\n }\n\n for (let i = 0, ii = numbers.length; i < ii;) {\n for (d = 0; d < stride; ++d, ++i) {\n const num = numbers[i];\n const delta = num - lastNumbers[d];\n lastNumbers[d] = num;\n\n numbers[i] = delta;\n }\n }\n\n return encodeFloats(numbers, factor);\n}\n\n\n/**\n * Decode a list of n-dimensional points from an encoded string\n *\n * @param {string} encoded An encoded string.\n * @param {number} stride The number of dimension of the points in the\n * encoded string.\n * @param {number=} opt_factor The factor by which the resulting numbers will\n * be divided. Default is `1e5`.\n * @return {Array.<number>} A list of n-dimensional points.\n * @api\n */\nexport function decodeDeltas(encoded, stride, opt_factor) {\n const factor = opt_factor ? opt_factor : 1e5;\n let d;\n\n /** @type {Array.<number>} */\n const lastNumbers = new Array(stride);\n for (d = 0; d < stride; ++d) {\n lastNumbers[d] = 0;\n }\n\n const numbers = decodeFloats(encoded, factor);\n\n for (let i = 0, ii = numbers.length; i < ii;) {\n for (d = 0; d < stride; ++d, ++i) {\n lastNumbers[d] += numbers[i];\n\n numbers[i] = lastNumbers[d];\n }\n }\n\n return numbers;\n}\n\n\n/**\n * Encode a list of floating point numbers and return an encoded string\n *\n * Attention: This function will modify the passed array!\n *\n * @param {Array.<number>} numbers A list of floating point numbers.\n * @param {number=} opt_factor The factor by which the numbers will be\n * multiplied. The remaining decimal places will get rounded away.\n * Default is `1e5`.\n * @return {string} The encoded string.\n * @api\n */\nexport function encodeFloats(numbers, opt_factor) {\n const factor = opt_factor ? opt_factor : 1e5;\n for (let i = 0, ii = numbers.length; i < ii; ++i) {\n numbers[i] = Math.round(numbers[i] * factor);\n }\n\n return encodeSignedIntegers(numbers);\n}\n\n\n/**\n * Decode a list of floating point numbers from an encoded string\n *\n * @param {string} encoded An encoded string.\n * @param {number=} opt_factor The factor by which the result will be divided.\n * Default is `1e5`.\n * @return {Array.<number>} A list of floating point numbers.\n * @api\n */\nexport function decodeFloats(encoded, opt_factor) {\n const factor = opt_factor ? opt_factor : 1e5;\n const numbers = decodeSignedIntegers(encoded);\n for (let i = 0, ii = numbers.length; i < ii; ++i) {\n numbers[i] /= factor;\n }\n return numbers;\n}\n\n\n/**\n * Encode a list of signed integers and return an encoded string\n *\n * Attention: This function will modify the passed array!\n *\n * @param {Array.<number>} numbers A list of signed integers.\n * @return {string} The encoded string.\n */\nexport function encodeSignedIntegers(numbers) {\n for (let i = 0, ii = numbers.length; i < ii; ++i) {\n const num = numbers[i];\n numbers[i] = (num < 0) ? ~(num << 1) : (num << 1);\n }\n return encodeUnsignedIntegers(numbers);\n}\n\n\n/**\n * Decode a list of signed integers from an encoded string\n *\n * @param {string} encoded An encoded string.\n * @return {Array.<number>} A list of signed integers.\n */\nexport function decodeSignedIntegers(encoded) {\n const numbers = decodeUnsignedIntegers(encoded);\n for (let i = 0, ii = numbers.length; i < ii; ++i) {\n const num = numbers[i];\n numbers[i] = (num & 1) ? ~(num >> 1) : (num >> 1);\n }\n return numbers;\n}\n\n\n/**\n * Encode a list of unsigned integers and return an encoded string\n *\n * @param {Array.<number>} numbers A list of unsigned integers.\n * @return {string} The encoded string.\n */\nexport function encodeUnsignedIntegers(numbers) {\n let encoded = '';\n for (let i = 0, ii = numbers.length; i < ii; ++i) {\n encoded += encodeUnsignedInteger(numbers[i]);\n }\n return encoded;\n}\n\n\n/**\n * Decode a list of unsigned integers from an encoded string\n *\n * @param {string} encoded An encoded string.\n * @return {Array.<number>} A list of unsigned integers.\n */\nexport function decodeUnsignedIntegers(encoded) {\n const numbers = [];\n let current = 0;\n let shift = 0;\n for (let i = 0, ii = encoded.length; i < ii; ++i) {\n const b = encoded.charCodeAt(i) - 63;\n current |= (b & 0x1f) << shift;\n if (b < 0x20) {\n numbers.push(current);\n current = 0;\n shift = 0;\n } else {\n shift += 5;\n }\n }\n return numbers;\n}\n\n\n/**\n * Encode one single unsigned integer and return an encoded string\n *\n * @param {number} num Unsigned integer that should be encoded.\n * @return {string} The encoded string.\n */\nexport function encodeUnsignedInteger(num) {\n let value, encoded = '';\n while (num >= 0x20) {\n value = (0x20 | (num & 0x1f)) + 63;\n encoded += String.fromCharCode(value);\n num >>= 5;\n }\n value = num + 63;\n encoded += String.fromCharCode(value);\n return encoded;\n}\n\n\n/**\n * Read the feature from the Polyline source. The coordinates are assumed to be\n * in two dimensions and in latitude, longitude order.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/Feature} Feature.\n * @api\n */\nPolyline.prototype.readFeature;\n\n\n/**\n * @inheritDoc\n */\nPolyline.prototype.readFeatureFromText = function(text, opt_options) {\n const geometry = this.readGeometryFromText(text, opt_options);\n return new Feature(geometry);\n};\n\n\n/**\n * Read the feature from the source. As Polyline sources contain a single\n * feature, this will return the feature in an array.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nPolyline.prototype.readFeatures;\n\n\n/**\n * @inheritDoc\n */\nPolyline.prototype.readFeaturesFromText = function(text, opt_options) {\n const feature = this.readFeatureFromText(text, opt_options);\n return [feature];\n};\n\n\n/**\n * Read the geometry from the source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/geom/Geometry} Geometry.\n * @api\n */\nPolyline.prototype.readGeometry;\n\n\n/**\n * @inheritDoc\n */\nPolyline.prototype.readGeometryFromText = function(text, opt_options) {\n const stride = getStrideForLayout(this.geometryLayout_);\n const flatCoordinates = decodeDeltas(text, stride, this.factor_);\n flipXY(flatCoordinates, 0, flatCoordinates.length, stride, flatCoordinates);\n const coordinates = inflateCoordinates(flatCoordinates, 0, flatCoordinates.length, stride);\n\n return (\n /** @type {module:ol/geom/Geometry} */ (transformWithOptions(\n new LineString(coordinates, this.geometryLayout_),\n false,\n this.adaptOptions(opt_options)\n ))\n );\n};\n\n\n/**\n * Read the projection from a Polyline source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @return {module:ol/proj/Projection} Projection.\n * @api\n */\nPolyline.prototype.readProjection;\n\n\n/**\n * @inheritDoc\n */\nPolyline.prototype.writeFeatureText = function(feature, opt_options) {\n const geometry = feature.getGeometry();\n if (geometry) {\n return this.writeGeometryText(geometry, opt_options);\n } else {\n assert(false, 40); // Expected `feature` to have a geometry\n return '';\n }\n};\n\n\n/**\n * @inheritDoc\n */\nPolyline.prototype.writeFeaturesText = function(features, opt_options) {\n return this.writeFeatureText(features[0], opt_options);\n};\n\n\n/**\n * Write a single geometry in Polyline format.\n *\n * @function\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} Geometry.\n * @api\n */\nPolyline.prototype.writeGeometry;\n\n\n/**\n * @inheritDoc\n */\nPolyline.prototype.writeGeometryText = function(geometry, opt_options) {\n geometry = /** @type {module:ol/geom/LineString} */\n (transformWithOptions(geometry, true, this.adaptOptions(opt_options)));\n const flatCoordinates = geometry.getFlatCoordinates();\n const stride = geometry.getStride();\n flipXY(flatCoordinates, 0, flatCoordinates.length, stride, flatCoordinates);\n return encodeDeltas(flatCoordinates, stride, this.factor_);\n};\nexport default Polyline;\n","/**\n * @module ol/format/TopoJSON\n */\nimport {inherits} from '../util.js';\nimport Feature from '../Feature.js';\nimport {transformWithOptions} from '../format/Feature.js';\nimport JSONFeature from '../format/JSONFeature.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport {get as getProjection} from '../proj.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/proj~ProjectionLike} [dataProjection='EPSG:4326'] Default data projection.\n * @property {string} [layerName] Set the name of the TopoJSON topology\n * `objects`'s children as feature property with the specified name. This means\n * that when set to `'layer'`, a topology like\n * ```\n * {\n * \"type\": \"Topology\",\n * \"objects\": {\n * \"example\": {\n * \"type\": \"GeometryCollection\",\n * \"geometries\": []\n * }\n * }\n * }\n * ```\n * will result in features that have a property `'layer'` set to `'example'`.\n * When not set, no property will be added to features.\n * @property {Array.<string>} [layers] Names of the TopoJSON topology's\n * `objects`'s children to read features from. If not provided, features will\n * be read from all children.\n */\n\n\n/**\n * @classdesc\n * Feature format for reading data in the TopoJSON format.\n *\n * @constructor\n * @extends {module:ol/format/JSONFeature}\n * @param {module:ol/format/TopoJSON~Options=} opt_options Options.\n * @api\n */\nconst TopoJSON = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n JSONFeature.call(this);\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.layerName_ = options.layerName;\n\n /**\n * @private\n * @type {Array.<string>}\n */\n this.layers_ = options.layers ? options.layers : null;\n\n /**\n * @inheritDoc\n */\n this.dataProjection = getProjection(\n options.dataProjection ?\n options.dataProjection : 'EPSG:4326');\n\n};\n\ninherits(TopoJSON, JSONFeature);\n\n\n/**\n * @const\n * @type {Object.<string, function(TopoJSONGeometry, Array, ...Array): module:ol/geom/Geometry>}\n */\nconst GEOMETRY_READERS = {\n 'Point': readPointGeometry,\n 'LineString': readLineStringGeometry,\n 'Polygon': readPolygonGeometry,\n 'MultiPoint': readMultiPointGeometry,\n 'MultiLineString': readMultiLineStringGeometry,\n 'MultiPolygon': readMultiPolygonGeometry\n};\n\n\n/**\n * Concatenate arcs into a coordinate array.\n * @param {Array.<number>} indices Indices of arcs to concatenate. Negative\n * values indicate arcs need to be reversed.\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} arcs Array of arcs (already\n * transformed).\n * @return {Array.<module:ol/coordinate~Coordinate>} Coordinates array.\n */\nfunction concatenateArcs(indices, arcs) {\n /** @type {Array.<module:ol/coordinate~Coordinate>} */\n const coordinates = [];\n let index, arc;\n for (let i = 0, ii = indices.length; i < ii; ++i) {\n index = indices[i];\n if (i > 0) {\n // splicing together arcs, discard last point\n coordinates.pop();\n }\n if (index >= 0) {\n // forward arc\n arc = arcs[index];\n } else {\n // reverse arc\n arc = arcs[~index].slice().reverse();\n }\n coordinates.push.apply(coordinates, arc);\n }\n // provide fresh copies of coordinate arrays\n for (let j = 0, jj = coordinates.length; j < jj; ++j) {\n coordinates[j] = coordinates[j].slice();\n }\n return coordinates;\n}\n\n\n/**\n * Create a point from a TopoJSON geometry object.\n *\n * @param {TopoJSONGeometry} object TopoJSON object.\n * @param {Array.<number>} scale Scale for each dimension.\n * @param {Array.<number>} translate Translation for each dimension.\n * @return {module:ol/geom/Point} Geometry.\n */\nfunction readPointGeometry(object, scale, translate) {\n const coordinates = object.coordinates;\n if (scale && translate) {\n transformVertex(coordinates, scale, translate);\n }\n return new Point(coordinates);\n}\n\n\n/**\n * Create a multi-point from a TopoJSON geometry object.\n *\n * @param {TopoJSONGeometry} object TopoJSON object.\n * @param {Array.<number>} scale Scale for each dimension.\n * @param {Array.<number>} translate Translation for each dimension.\n * @return {module:ol/geom/MultiPoint} Geometry.\n */\nfunction readMultiPointGeometry(object, scale, translate) {\n const coordinates = object.coordinates;\n if (scale && translate) {\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n transformVertex(coordinates[i], scale, translate);\n }\n }\n return new MultiPoint(coordinates);\n}\n\n\n/**\n * Create a linestring from a TopoJSON geometry object.\n *\n * @param {TopoJSONGeometry} object TopoJSON object.\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} arcs Array of arcs.\n * @return {module:ol/geom/LineString} Geometry.\n */\nfunction readLineStringGeometry(object, arcs) {\n const coordinates = concatenateArcs(object.arcs, arcs);\n return new LineString(coordinates);\n}\n\n\n/**\n * Create a multi-linestring from a TopoJSON geometry object.\n *\n * @param {TopoJSONGeometry} object TopoJSON object.\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} arcs Array of arcs.\n * @return {module:ol/geom/MultiLineString} Geometry.\n */\nfunction readMultiLineStringGeometry(object, arcs) {\n const coordinates = [];\n for (let i = 0, ii = object.arcs.length; i < ii; ++i) {\n coordinates[i] = concatenateArcs(object.arcs[i], arcs);\n }\n return new MultiLineString(coordinates);\n}\n\n\n/**\n * Create a polygon from a TopoJSON geometry object.\n *\n * @param {TopoJSONGeometry} object TopoJSON object.\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} arcs Array of arcs.\n * @return {module:ol/geom/Polygon} Geometry.\n */\nfunction readPolygonGeometry(object, arcs) {\n const coordinates = [];\n for (let i = 0, ii = object.arcs.length; i < ii; ++i) {\n coordinates[i] = concatenateArcs(object.arcs[i], arcs);\n }\n return new Polygon(coordinates);\n}\n\n\n/**\n * Create a multi-polygon from a TopoJSON geometry object.\n *\n * @param {TopoJSONGeometry} object TopoJSON object.\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} arcs Array of arcs.\n * @return {module:ol/geom/MultiPolygon} Geometry.\n */\nfunction readMultiPolygonGeometry(object, arcs) {\n const coordinates = [];\n for (let i = 0, ii = object.arcs.length; i < ii; ++i) {\n // for each polygon\n const polyArray = object.arcs[i];\n const ringCoords = [];\n for (let j = 0, jj = polyArray.length; j < jj; ++j) {\n // for each ring\n ringCoords[j] = concatenateArcs(polyArray[j], arcs);\n }\n coordinates[i] = ringCoords;\n }\n return new MultiPolygon(coordinates);\n}\n\n\n/**\n * Create features from a TopoJSON GeometryCollection object.\n *\n * @param {TopoJSONGeometryCollection} collection TopoJSON Geometry\n * object.\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} arcs Array of arcs.\n * @param {Array.<number>} scale Scale for each dimension.\n * @param {Array.<number>} translate Translation for each dimension.\n * @param {string|undefined} property Property to set the `GeometryCollection`'s parent\n * object to.\n * @param {string} name Name of the `Topology`'s child object.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {Array.<module:ol/Feature>} Array of features.\n */\nfunction readFeaturesFromGeometryCollection(collection, arcs, scale, translate, property, name, opt_options) {\n const geometries = collection.geometries;\n const features = [];\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n features[i] = readFeatureFromGeometry(\n geometries[i], arcs, scale, translate, property, name, opt_options);\n }\n return features;\n}\n\n\n/**\n * Create a feature from a TopoJSON geometry object.\n *\n * @param {TopoJSONGeometry} object TopoJSON geometry object.\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} arcs Array of arcs.\n * @param {Array.<number>} scale Scale for each dimension.\n * @param {Array.<number>} translate Translation for each dimension.\n * @param {string|undefined} property Property to set the `GeometryCollection`'s parent\n * object to.\n * @param {string} name Name of the `Topology`'s child object.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/Feature} Feature.\n */\nfunction readFeatureFromGeometry(object, arcs, scale, translate, property, name, opt_options) {\n let geometry;\n const type = object.type;\n const geometryReader = GEOMETRY_READERS[type];\n if ((type === 'Point') || (type === 'MultiPoint')) {\n geometry = geometryReader(object, scale, translate);\n } else {\n geometry = geometryReader(object, arcs);\n }\n const feature = new Feature();\n feature.setGeometry(/** @type {module:ol/geom/Geometry} */ (\n transformWithOptions(geometry, false, opt_options)));\n if (object.id !== undefined) {\n feature.setId(object.id);\n }\n let properties = object.properties;\n if (property) {\n if (!properties) {\n properties = {};\n }\n properties[property] = name;\n }\n if (properties) {\n feature.setProperties(properties);\n }\n return feature;\n}\n\n\n/**\n * Read all features from a TopoJSON source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nTopoJSON.prototype.readFeatures;\n\n\n/**\n * @inheritDoc\n */\nTopoJSON.prototype.readFeaturesFromObject = function(object, opt_options) {\n if (object.type == 'Topology') {\n const topoJSONTopology = /** @type {TopoJSONTopology} */ (object);\n let transform, scale = null, translate = null;\n if (topoJSONTopology.transform) {\n transform = topoJSONTopology.transform;\n scale = transform.scale;\n translate = transform.translate;\n }\n const arcs = topoJSONTopology.arcs;\n if (transform) {\n transformArcs(arcs, scale, translate);\n }\n /** @type {Array.<module:ol/Feature>} */\n const features = [];\n const topoJSONFeatures = topoJSONTopology.objects;\n const property = this.layerName_;\n let feature;\n for (const objectName in topoJSONFeatures) {\n if (this.layers_ && this.layers_.indexOf(objectName) == -1) {\n continue;\n }\n if (topoJSONFeatures[objectName].type === 'GeometryCollection') {\n feature = /** @type {TopoJSONGeometryCollection} */ (topoJSONFeatures[objectName]);\n features.push.apply(features, readFeaturesFromGeometryCollection(\n feature, arcs, scale, translate, property, objectName, opt_options));\n } else {\n feature = /** @type {TopoJSONGeometry} */ (topoJSONFeatures[objectName]);\n features.push(readFeatureFromGeometry(\n feature, arcs, scale, translate, property, objectName, opt_options));\n }\n }\n return features;\n } else {\n return [];\n }\n};\n\n\n/**\n * Apply a linear transform to array of arcs. The provided array of arcs is\n * modified in place.\n *\n * @param {Array.<Array.<module:ol/coordinate~Coordinate>>} arcs Array of arcs.\n * @param {Array.<number>} scale Scale for each dimension.\n * @param {Array.<number>} translate Translation for each dimension.\n */\nfunction transformArcs(arcs, scale, translate) {\n for (let i = 0, ii = arcs.length; i < ii; ++i) {\n transformArc(arcs[i], scale, translate);\n }\n}\n\n\n/**\n * Apply a linear transform to an arc. The provided arc is modified in place.\n *\n * @param {Array.<module:ol/coordinate~Coordinate>} arc Arc.\n * @param {Array.<number>} scale Scale for each dimension.\n * @param {Array.<number>} translate Translation for each dimension.\n */\nfunction transformArc(arc, scale, translate) {\n let x = 0;\n let y = 0;\n for (let i = 0, ii = arc.length; i < ii; ++i) {\n const vertex = arc[i];\n x += vertex[0];\n y += vertex[1];\n vertex[0] = x;\n vertex[1] = y;\n transformVertex(vertex, scale, translate);\n }\n}\n\n\n/**\n * Apply a linear transform to a vertex. The provided vertex is modified in\n * place.\n *\n * @param {module:ol/coordinate~Coordinate} vertex Vertex.\n * @param {Array.<number>} scale Scale for each dimension.\n * @param {Array.<number>} translate Translation for each dimension.\n */\nfunction transformVertex(vertex, scale, translate) {\n vertex[0] = vertex[0] * scale[0] + translate[0];\n vertex[1] = vertex[1] * scale[1] + translate[1];\n}\n\n\n/**\n * Read the projection from a TopoJSON source.\n *\n * @param {Document|Node|Object|string} object Source.\n * @return {module:ol/proj/Projection} Projection.\n * @override\n * @api\n */\nTopoJSON.prototype.readProjection;\n\n\n/**\n * @inheritDoc\n */\nTopoJSON.prototype.readProjectionFromObject = function(object) {\n return this.dataProjection;\n};\n\n\n/**\n * Not implemented.\n * @inheritDoc\n */\nTopoJSON.prototype.writeFeatureObject = function(feature, opt_options) {};\n\n\n/**\n * Not implemented.\n * @inheritDoc\n */\nTopoJSON.prototype.writeFeaturesObject = function(features, opt_options) {};\n\n\n/**\n * Not implemented.\n * @inheritDoc\n */\nTopoJSON.prototype.writeGeometryObject = function(geometry, opt_options) {};\n\n\n/**\n * Not implemented.\n * @override\n */\nTopoJSON.prototype.readGeometryFromObject = function() {};\n\n\n/**\n * Not implemented.\n * @override\n */\nTopoJSON.prototype.readFeatureFromObject = function() {};\nexport default TopoJSON;\n","/**\n * @module ol/format/filter/Filter\n */\n\n\n/**\n * @classdesc\n * Abstract class; normally only used for creating subclasses and not instantiated in apps.\n * Base class for WFS GetFeature filters.\n *\n * @constructor\n * @abstract\n * @param {!string} tagName The XML tag name for this filter.\n * @struct\n */\nconst Filter = function(tagName) {\n\n /**\n * @private\n * @type {!string}\n */\n this.tagName_ = tagName;\n};\n\n/**\n * The XML tag name for a filter.\n * @returns {!string} Name.\n */\nFilter.prototype.getTagName = function() {\n return this.tagName_;\n};\n\nexport default Filter;\n","/**\n * @module ol/format/filter/LogicalNary\n */\nimport {inherits} from '../../util.js';\nimport {assert} from '../../asserts.js';\nimport Filter from '../filter/Filter.js';\n\n/**\n * @classdesc\n * Abstract class; normally only used for creating subclasses and not instantiated in apps.\n * Base class for WFS GetFeature n-ary logical filters.\n *\n * @constructor\n * @abstract\n * @param {!string} tagName The XML tag name for this filter.\n * @param {...module:ol/format/filter/Filter} conditions Conditions.\n * @extends {module:ol/format/filter/Filter}\n */\nconst LogicalNary = function(tagName, conditions) {\n\n Filter.call(this, tagName);\n\n /**\n * @type {Array.<module:ol/format/filter/Filter>}\n */\n this.conditions = Array.prototype.slice.call(arguments, 1);\n assert(this.conditions.length >= 2, 57); // At least 2 conditions are required.\n};\n\ninherits(LogicalNary, Filter);\nexport default LogicalNary;\n","/**\n * @module ol/format/filter/And\n */\nimport {inherits} from '../../util.js';\nimport LogicalNary from '../filter/LogicalNary.js';\n\n/**\n * @classdesc\n * Represents a logical `<And>` operator between two or more filter conditions.\n *\n * @constructor\n * @abstract\n * @param {...module:ol/format/filter/Filter} conditions Conditions.\n * @extends {module:ol/format/filter/LogicalNary}\n */\nconst And = function(conditions) {\n const params = ['And'].concat(Array.prototype.slice.call(arguments));\n LogicalNary.apply(this, params);\n};\n\ninherits(And, LogicalNary);\n\nexport default And;\n","/**\n * @module ol/format/filter/Bbox\n */\nimport {inherits} from '../../util.js';\nimport Filter from '../filter/Filter.js';\n\n/**\n * @classdesc\n * Represents a `<BBOX>` operator to test whether a geometry-valued property\n * intersects a fixed bounding box\n *\n * @constructor\n * @param {!string} geometryName Geometry name to use.\n * @param {!module:ol/extent~Extent} extent Extent.\n * @param {string=} opt_srsName SRS name. No srsName attribute will be\n * set on geometries when this is not provided.\n * @extends {module:ol/format/filter/Filter}\n * @api\n */\nconst Bbox = function(geometryName, extent, opt_srsName) {\n\n Filter.call(this, 'BBOX');\n\n /**\n * @type {!string}\n */\n this.geometryName = geometryName;\n\n /**\n * @type {module:ol/extent~Extent}\n */\n this.extent = extent;\n\n /**\n * @type {string|undefined}\n */\n this.srsName = opt_srsName;\n};\n\ninherits(Bbox, Filter);\n\nexport default Bbox;\n","/**\n * @module ol/format/filter/Spatial\n */\nimport {inherits} from '../../util.js';\nimport Filter from '../filter/Filter.js';\n\n/**\n * @classdesc\n * Abstract class; normally only used for creating subclasses and not instantiated in apps.\n * Represents a spatial operator to test whether a geometry-valued property\n * relates to a given geometry.\n *\n * @constructor\n * @abstract\n * @param {!string} tagName The XML tag name for this filter.\n * @param {!string} geometryName Geometry name to use.\n * @param {!module:ol/geom/Geometry} geometry Geometry.\n * @param {string=} opt_srsName SRS name. No srsName attribute will be\n * set on geometries when this is not provided.\n * @extends {module:ol/format/filter/Filter}\n */\nconst Spatial = function(tagName, geometryName, geometry, opt_srsName) {\n\n Filter.call(this, tagName);\n\n /**\n * @type {!string}\n */\n this.geometryName = geometryName || 'the_geom';\n\n /**\n * @type {module:ol/geom/Geometry}\n */\n this.geometry = geometry;\n\n /**\n * @type {string|undefined}\n */\n this.srsName = opt_srsName;\n};\n\ninherits(Spatial, Filter);\n\nexport default Spatial;\n","/**\n * @module ol/format/filter/Contains\n */\nimport {inherits} from '../../util.js';\nimport Spatial from '../filter/Spatial.js';\n\n/**\n * @classdesc\n * Represents a `<Contains>` operator to test whether a geometry-valued property\n * contains a given geometry.\n *\n * @constructor\n * @param {!string} geometryName Geometry name to use.\n * @param {!module:ol/geom/Geometry} geometry Geometry.\n * @param {string=} opt_srsName SRS name. No srsName attribute will be\n * set on geometries when this is not provided.\n * @extends {module:ol/format/filter/Spatial}\n * @api\n */\nconst Contains = function(geometryName, geometry, opt_srsName) {\n\n Spatial.call(this, 'Contains', geometryName, geometry, opt_srsName);\n\n};\n\ninherits(Contains, Spatial);\nexport default Contains;\n","/**\n * @module ol/format/filter/Comparison\n */\nimport {inherits} from '../../util.js';\nimport Filter from '../filter/Filter.js';\n\n/**\n * @classdesc\n * Abstract class; normally only used for creating subclasses and not instantiated in apps.\n * Base class for WFS GetFeature property comparison filters.\n *\n * @constructor\n * @abstract\n * @param {!string} tagName The XML tag name for this filter.\n * @param {!string} propertyName Name of the context property to compare.\n * @extends {module:ol/format/filter/Filter}\n */\nconst Comparison = function(tagName, propertyName) {\n\n Filter.call(this, tagName);\n\n /**\n * @type {!string}\n */\n this.propertyName = propertyName;\n};\n\ninherits(Comparison, Filter);\n\nexport default Comparison;\n","/**\n * @module ol/format/filter/During\n */\nimport {inherits} from '../../util.js';\nimport Comparison from '../filter/Comparison.js';\n\n/**\n * @classdesc\n * Represents a `<During>` comparison operator.\n *\n * @constructor\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!string} begin The begin date in ISO-8601 format.\n * @param {!string} end The end date in ISO-8601 format.\n * @extends {module:ol/format/filter/Comparison}\n * @api\n */\nconst During = function(propertyName, begin, end) {\n Comparison.call(this, 'During', propertyName);\n\n /**\n * @type {!string}\n */\n this.begin = begin;\n\n /**\n * @type {!string}\n */\n this.end = end;\n};\n\ninherits(During, Comparison);\nexport default During;\n","/**\n * @module ol/format/filter/ComparisonBinary\n */\nimport {inherits} from '../../util.js';\nimport Comparison from '../filter/Comparison.js';\n\n/**\n * @classdesc\n * Abstract class; normally only used for creating subclasses and not instantiated in apps.\n * Base class for WFS GetFeature property binary comparison filters.\n *\n * @constructor\n * @abstract\n * @param {!string} tagName The XML tag name for this filter.\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!(string|number)} expression The value to compare.\n * @param {boolean=} opt_matchCase Case-sensitive?\n * @extends {module:ol/format/filter/Comparison}\n */\nconst ComparisonBinary = function(tagName, propertyName, expression, opt_matchCase) {\n\n Comparison.call(this, tagName, propertyName);\n\n /**\n * @type {!(string|number)}\n */\n this.expression = expression;\n\n /**\n * @type {boolean|undefined}\n */\n this.matchCase = opt_matchCase;\n};\n\ninherits(ComparisonBinary, Comparison);\nexport default ComparisonBinary;\n","/**\n * @module ol/format/filter/EqualTo\n */\nimport {inherits} from '../../util.js';\nimport ComparisonBinary from '../filter/ComparisonBinary.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsEqualTo>` comparison operator.\n *\n * @constructor\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!(string|number)} expression The value to compare.\n * @param {boolean=} opt_matchCase Case-sensitive?\n * @extends {module:ol/format/filter/ComparisonBinary}\n * @api\n */\nconst EqualTo = function(propertyName, expression, opt_matchCase) {\n ComparisonBinary.call(this, 'PropertyIsEqualTo', propertyName, expression, opt_matchCase);\n};\n\ninherits(EqualTo, ComparisonBinary);\nexport default EqualTo;\n","/**\n * @module ol/format/filter/GreaterThan\n */\nimport {inherits} from '../../util.js';\nimport ComparisonBinary from '../filter/ComparisonBinary.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsGreaterThan>` comparison operator.\n *\n * @constructor\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} expression The value to compare.\n * @extends {module:ol/format/filter/ComparisonBinary}\n * @api\n */\nconst GreaterThan = function(propertyName, expression) {\n ComparisonBinary.call(this, 'PropertyIsGreaterThan', propertyName, expression);\n};\n\ninherits(GreaterThan, ComparisonBinary);\nexport default GreaterThan;\n","/**\n * @module ol/format/filter/GreaterThanOrEqualTo\n */\nimport {inherits} from '../../util.js';\nimport ComparisonBinary from '../filter/ComparisonBinary.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsGreaterThanOrEqualTo>` comparison operator.\n *\n * @constructor\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} expression The value to compare.\n * @extends {module:ol/format/filter/ComparisonBinary}\n * @api\n */\nconst GreaterThanOrEqualTo = function(propertyName, expression) {\n ComparisonBinary.call(this, 'PropertyIsGreaterThanOrEqualTo', propertyName, expression);\n};\n\ninherits(GreaterThanOrEqualTo, ComparisonBinary);\nexport default GreaterThanOrEqualTo;\n","/**\n * @module ol/format/filter/Intersects\n */\nimport {inherits} from '../../util.js';\nimport Spatial from '../filter/Spatial.js';\n\n/**\n * @classdesc\n * Represents a `<Intersects>` operator to test whether a geometry-valued property\n * intersects a given geometry.\n *\n * @constructor\n * @param {!string} geometryName Geometry name to use.\n * @param {!module:ol/geom/Geometry} geometry Geometry.\n * @param {string=} opt_srsName SRS name. No srsName attribute will be\n * set on geometries when this is not provided.\n * @extends {module:ol/format/filter/Spatial}\n * @api\n */\nconst Intersects = function(geometryName, geometry, opt_srsName) {\n\n Spatial.call(this, 'Intersects', geometryName, geometry, opt_srsName);\n\n};\n\ninherits(Intersects, Spatial);\nexport default Intersects;\n","/**\n * @module ol/format/filter/IsBetween\n */\nimport {inherits} from '../../util.js';\nimport Comparison from '../filter/Comparison.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsBetween>` comparison operator.\n *\n * @constructor\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} lowerBoundary The lower bound of the range.\n * @param {!number} upperBoundary The upper bound of the range.\n * @extends {module:ol/format/filter/Comparison}\n * @api\n */\nconst IsBetween = function(propertyName, lowerBoundary, upperBoundary) {\n Comparison.call(this, 'PropertyIsBetween', propertyName);\n\n /**\n * @type {!number}\n */\n this.lowerBoundary = lowerBoundary;\n\n /**\n * @type {!number}\n */\n this.upperBoundary = upperBoundary;\n};\n\ninherits(IsBetween, Comparison);\nexport default IsBetween;\n","/**\n * @module ol/format/filter/IsLike\n */\nimport {inherits} from '../../util.js';\nimport Comparison from '../filter/Comparison.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsLike>` comparison operator.\n *\n * @constructor\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!string} pattern Text pattern.\n * @param {string=} opt_wildCard Pattern character which matches any sequence of\n * zero or more string characters. Default is '*'.\n * @param {string=} opt_singleChar pattern character which matches any single\n * string character. Default is '.'.\n * @param {string=} opt_escapeChar Escape character which can be used to escape\n * the pattern characters. Default is '!'.\n * @param {boolean=} opt_matchCase Case-sensitive?\n * @extends {module:ol/format/filter/Comparison}\n * @api\n */\nconst IsLike = function(propertyName, pattern, opt_wildCard, opt_singleChar, opt_escapeChar, opt_matchCase) {\n Comparison.call(this, 'PropertyIsLike', propertyName);\n\n /**\n * @type {!string}\n */\n this.pattern = pattern;\n\n /**\n * @type {!string}\n */\n this.wildCard = (opt_wildCard !== undefined) ? opt_wildCard : '*';\n\n /**\n * @type {!string}\n */\n this.singleChar = (opt_singleChar !== undefined) ? opt_singleChar : '.';\n\n /**\n * @type {!string}\n */\n this.escapeChar = (opt_escapeChar !== undefined) ? opt_escapeChar : '!';\n\n /**\n * @type {boolean|undefined}\n */\n this.matchCase = opt_matchCase;\n};\n\ninherits(IsLike, Comparison);\nexport default IsLike;\n","/**\n * @module ol/format/filter/IsNull\n */\nimport {inherits} from '../../util.js';\nimport Comparison from '../filter/Comparison.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsNull>` comparison operator.\n *\n * @constructor\n * @param {!string} propertyName Name of the context property to compare.\n * @extends {module:ol/format/filter/Comparison}\n * @api\n */\nconst IsNull = function(propertyName) {\n Comparison.call(this, 'PropertyIsNull', propertyName);\n};\n\ninherits(IsNull, Comparison);\nexport default IsNull;\n","/**\n * @module ol/format/filter/LessThan\n */\nimport {inherits} from '../../util.js';\nimport ComparisonBinary from '../filter/ComparisonBinary.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsLessThan>` comparison operator.\n *\n * @constructor\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} expression The value to compare.\n * @extends {module:ol/format/filter/ComparisonBinary}\n * @api\n */\nconst LessThan = function(propertyName, expression) {\n ComparisonBinary.call(this, 'PropertyIsLessThan', propertyName, expression);\n};\n\ninherits(LessThan, ComparisonBinary);\nexport default LessThan;\n","/**\n * @module ol/format/filter/LessThanOrEqualTo\n */\nimport {inherits} from '../../util.js';\nimport ComparisonBinary from '../filter/ComparisonBinary.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsLessThanOrEqualTo>` comparison operator.\n *\n * @constructor\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} expression The value to compare.\n * @extends {module:ol/format/filter/ComparisonBinary}\n * @api\n */\nconst LessThanOrEqualTo = function(propertyName, expression) {\n ComparisonBinary.call(this, 'PropertyIsLessThanOrEqualTo', propertyName, expression);\n};\n\ninherits(LessThanOrEqualTo, ComparisonBinary);\nexport default LessThanOrEqualTo;\n","/**\n * @module ol/format/filter/Not\n */\nimport {inherits} from '../../util.js';\nimport Filter from '../filter/Filter.js';\n\n/**\n * @classdesc\n * Represents a logical `<Not>` operator for a filter condition.\n *\n * @constructor\n * @param {!module:ol/format/filter/Filter} condition Filter condition.\n * @extends {module:ol/format/filter/Filter}\n * @api\n */\nconst Not = function(condition) {\n\n Filter.call(this, 'Not');\n\n /**\n * @type {!module:ol/format/filter/Filter}\n */\n this.condition = condition;\n};\n\ninherits(Not, Filter);\nexport default Not;\n","/**\n * @module ol/format/filter/NotEqualTo\n */\nimport {inherits} from '../../util.js';\nimport ComparisonBinary from '../filter/ComparisonBinary.js';\n\n/**\n * @classdesc\n * Represents a `<PropertyIsNotEqualTo>` comparison operator.\n *\n * @constructor\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!(string|number)} expression The value to compare.\n * @param {boolean=} opt_matchCase Case-sensitive?\n * @extends {module:ol/format/filter/ComparisonBinary}\n * @api\n */\nconst NotEqualTo = function(propertyName, expression, opt_matchCase) {\n ComparisonBinary.call(this, 'PropertyIsNotEqualTo', propertyName, expression, opt_matchCase);\n};\n\ninherits(NotEqualTo, ComparisonBinary);\nexport default NotEqualTo;\n","/**\n * @module ol/format/filter/Or\n */\nimport {inherits} from '../../util.js';\nimport LogicalNary from '../filter/LogicalNary.js';\n\n/**\n * @classdesc\n * Represents a logical `<Or>` operator between two ore more filter conditions.\n *\n * @constructor\n * @param {...module:ol/format/filter/Filter} conditions Conditions.\n * @extends {module:ol/format/filter/LogicalNary}\n * @api\n */\nconst Or = function(conditions) {\n const params = ['Or'].concat(Array.prototype.slice.call(arguments));\n LogicalNary.apply(this, params);\n};\n\ninherits(Or, LogicalNary);\nexport default Or;\n","/**\n * @module ol/format/filter/Within\n */\nimport {inherits} from '../../util.js';\nimport Spatial from '../filter/Spatial.js';\n\n/**\n * @classdesc\n * Represents a `<Within>` operator to test whether a geometry-valued property\n * is within a given geometry.\n *\n * @constructor\n * @param {!string} geometryName Geometry name to use.\n * @param {!module:ol/geom/Geometry} geometry Geometry.\n * @param {string=} opt_srsName SRS name. No srsName attribute will be\n * set on geometries when this is not provided.\n * @extends {module:ol/format/filter/Spatial}\n * @api\n */\nconst Within = function(geometryName, geometry, opt_srsName) {\n\n Spatial.call(this, 'Within', geometryName, geometry, opt_srsName);\n\n};\n\ninherits(Within, Spatial);\nexport default Within;\n","/**\n * @module ol/format/filter\n */\nimport And from '../format/filter/And.js';\nimport Bbox from '../format/filter/Bbox.js';\nimport Contains from '../format/filter/Contains.js';\nimport During from '../format/filter/During.js';\nimport EqualTo from '../format/filter/EqualTo.js';\nimport GreaterThan from '../format/filter/GreaterThan.js';\nimport GreaterThanOrEqualTo from '../format/filter/GreaterThanOrEqualTo.js';\nimport Intersects from '../format/filter/Intersects.js';\nimport IsBetween from '../format/filter/IsBetween.js';\nimport IsLike from '../format/filter/IsLike.js';\nimport IsNull from '../format/filter/IsNull.js';\nimport LessThan from '../format/filter/LessThan.js';\nimport LessThanOrEqualTo from '../format/filter/LessThanOrEqualTo.js';\nimport Not from '../format/filter/Not.js';\nimport NotEqualTo from '../format/filter/NotEqualTo.js';\nimport Or from '../format/filter/Or.js';\nimport Within from '../format/filter/Within.js';\n\n\n/**\n * Create a logical `<And>` operator between two or more filter conditions.\n *\n * @param {...module:ol/format/filter/Filter} conditions Filter conditions.\n * @returns {!module:ol/format/filter/And} `<And>` operator.\n * @api\n */\nexport function and(conditions) {\n const params = [null].concat(Array.prototype.slice.call(arguments));\n return new (Function.prototype.bind.apply(And, params));\n}\n\n\n/**\n * Create a logical `<Or>` operator between two or more filter conditions.\n *\n * @param {...module:ol/format/filter/Filter} conditions Filter conditions.\n * @returns {!module:ol/format/filter/Or} `<Or>` operator.\n * @api\n */\nexport function or(conditions) {\n const params = [null].concat(Array.prototype.slice.call(arguments));\n return new (Function.prototype.bind.apply(Or, params));\n}\n\n\n/**\n * Represents a logical `<Not>` operator for a filter condition.\n *\n * @param {!module:ol/format/filter/Filter} condition Filter condition.\n * @returns {!module:ol/format/filter/Not} `<Not>` operator.\n * @api\n */\nexport function not(condition) {\n return new Not(condition);\n}\n\n\n/**\n * Create a `<BBOX>` operator to test whether a geometry-valued property\n * intersects a fixed bounding box\n *\n * @param {!string} geometryName Geometry name to use.\n * @param {!module:ol/extent~Extent} extent Extent.\n * @param {string=} opt_srsName SRS name. No srsName attribute will be\n * set on geometries when this is not provided.\n * @returns {!module:ol/format/filter/Bbox} `<BBOX>` operator.\n * @api\n */\nexport function bbox(geometryName, extent, opt_srsName) {\n return new Bbox(geometryName, extent, opt_srsName);\n}\n\n/**\n * Create a `<Contains>` operator to test whether a geometry-valued property\n * contains a given geometry.\n *\n * @param {!string} geometryName Geometry name to use.\n * @param {!module:ol/geom/Geometry} geometry Geometry.\n * @param {string=} opt_srsName SRS name. No srsName attribute will be\n * set on geometries when this is not provided.\n * @returns {!module:ol/format/filter/Contains} `<Contains>` operator.\n * @api\n */\nexport function contains(geometryName, geometry, opt_srsName) {\n return new Contains(geometryName, geometry, opt_srsName);\n}\n\n/**\n * Create a `<Intersects>` operator to test whether a geometry-valued property\n * intersects a given geometry.\n *\n * @param {!string} geometryName Geometry name to use.\n * @param {!module:ol/geom/Geometry} geometry Geometry.\n * @param {string=} opt_srsName SRS name. No srsName attribute will be\n * set on geometries when this is not provided.\n * @returns {!module:ol/format/filter/Intersects} `<Intersects>` operator.\n * @api\n */\nexport function intersects(geometryName, geometry, opt_srsName) {\n return new Intersects(geometryName, geometry, opt_srsName);\n}\n\n/**\n * Create a `<Within>` operator to test whether a geometry-valued property\n * is within a given geometry.\n *\n * @param {!string} geometryName Geometry name to use.\n * @param {!module:ol/geom/Geometry} geometry Geometry.\n * @param {string=} opt_srsName SRS name. No srsName attribute will be\n * set on geometries when this is not provided.\n * @returns {!module:ol/format/filter/Within} `<Within>` operator.\n * @api\n */\nexport function within(geometryName, geometry, opt_srsName) {\n return new Within(geometryName, geometry, opt_srsName);\n}\n\n\n/**\n * Creates a `<PropertyIsEqualTo>` comparison operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!(string|number)} expression The value to compare.\n * @param {boolean=} opt_matchCase Case-sensitive?\n * @returns {!module:ol/format/filter/EqualTo} `<PropertyIsEqualTo>` operator.\n * @api\n */\nexport function equalTo(propertyName, expression, opt_matchCase) {\n return new EqualTo(propertyName, expression, opt_matchCase);\n}\n\n\n/**\n * Creates a `<PropertyIsNotEqualTo>` comparison operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!(string|number)} expression The value to compare.\n * @param {boolean=} opt_matchCase Case-sensitive?\n * @returns {!module:ol/format/filter/NotEqualTo} `<PropertyIsNotEqualTo>` operator.\n * @api\n */\nexport function notEqualTo(propertyName, expression, opt_matchCase) {\n return new NotEqualTo(propertyName, expression, opt_matchCase);\n}\n\n\n/**\n * Creates a `<PropertyIsLessThan>` comparison operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} expression The value to compare.\n * @returns {!module:ol/format/filter/LessThan} `<PropertyIsLessThan>` operator.\n * @api\n */\nexport function lessThan(propertyName, expression) {\n return new LessThan(propertyName, expression);\n}\n\n\n/**\n * Creates a `<PropertyIsLessThanOrEqualTo>` comparison operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} expression The value to compare.\n * @returns {!module:ol/format/filter/LessThanOrEqualTo} `<PropertyIsLessThanOrEqualTo>` operator.\n * @api\n */\nexport function lessThanOrEqualTo(propertyName, expression) {\n return new LessThanOrEqualTo(propertyName, expression);\n}\n\n\n/**\n * Creates a `<PropertyIsGreaterThan>` comparison operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} expression The value to compare.\n * @returns {!module:ol/format/filter/GreaterThan} `<PropertyIsGreaterThan>` operator.\n * @api\n */\nexport function greaterThan(propertyName, expression) {\n return new GreaterThan(propertyName, expression);\n}\n\n\n/**\n * Creates a `<PropertyIsGreaterThanOrEqualTo>` comparison operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} expression The value to compare.\n * @returns {!module:ol/format/filter/GreaterThanOrEqualTo} `<PropertyIsGreaterThanOrEqualTo>` operator.\n * @api\n */\nexport function greaterThanOrEqualTo(propertyName, expression) {\n return new GreaterThanOrEqualTo(propertyName, expression);\n}\n\n\n/**\n * Creates a `<PropertyIsNull>` comparison operator to test whether a property value\n * is null.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @returns {!module:ol/format/filter/IsNull} `<PropertyIsNull>` operator.\n * @api\n */\nexport function isNull(propertyName) {\n return new IsNull(propertyName);\n}\n\n\n/**\n * Creates a `<PropertyIsBetween>` comparison operator to test whether an expression\n * value lies within a range given by a lower and upper bound (inclusive).\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!number} lowerBoundary The lower bound of the range.\n * @param {!number} upperBoundary The upper bound of the range.\n * @returns {!module:ol/format/filter/IsBetween} `<PropertyIsBetween>` operator.\n * @api\n */\nexport function between(propertyName, lowerBoundary, upperBoundary) {\n return new IsBetween(propertyName, lowerBoundary, upperBoundary);\n}\n\n\n/**\n * Represents a `<PropertyIsLike>` comparison operator that matches a string property\n * value against a text pattern.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!string} pattern Text pattern.\n * @param {string=} opt_wildCard Pattern character which matches any sequence of\n * zero or more string characters. Default is '*'.\n * @param {string=} opt_singleChar pattern character which matches any single\n * string character. Default is '.'.\n * @param {string=} opt_escapeChar Escape character which can be used to escape\n * the pattern characters. Default is '!'.\n * @param {boolean=} opt_matchCase Case-sensitive?\n * @returns {!module:ol/format/filter/IsLike} `<PropertyIsLike>` operator.\n * @api\n */\nexport function like(propertyName, pattern,\n opt_wildCard, opt_singleChar, opt_escapeChar, opt_matchCase) {\n return new IsLike(propertyName, pattern,\n opt_wildCard, opt_singleChar, opt_escapeChar, opt_matchCase);\n}\n\n\n/**\n * Create a `<During>` temporal operator.\n *\n * @param {!string} propertyName Name of the context property to compare.\n * @param {!string} begin The begin date in ISO-8601 format.\n * @param {!string} end The end date in ISO-8601 format.\n * @returns {!module:ol/format/filter/During} `<During>` operator.\n * @api\n */\nexport function during(propertyName, begin, end) {\n return new During(propertyName, begin, end);\n}\n","/**\n * @module ol/format/WFS\n */\nimport {inherits} from '../util.js';\nimport {assert} from '../asserts.js';\nimport GML2 from '../format/GML2.js';\nimport GML3 from '../format/GML3.js';\nimport GMLBase, {GMLNS} from '../format/GMLBase.js';\nimport {and as andFilter, bbox as bboxFilter} from '../format/filter.js';\nimport XMLFeature from '../format/XMLFeature.js';\nimport {readNonNegativeIntegerString, readNonNegativeInteger, writeStringTextNode} from '../format/xsd.js';\nimport Geometry from '../geom/Geometry.js';\nimport {assign} from '../obj.js';\nimport {get as getProjection} from '../proj.js';\nimport {createElementNS, isDocument, isNode, makeArrayPusher, makeChildAppender,\n makeObjectPropertySetter, makeSimpleNodeFactory, parse, parseNode,\n pushParseAndPop, pushSerializeAndPop, XML_SCHEMA_INSTANCE_URI} from '../xml.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {Object.<string, string>|string} [featureNS] The namespace URI used for features.\n * @property {Array.<string>|string} [featureType] The feature type to parse. Only used for read operations.\n * @property {module:ol/format/GMLBase} [gmlFormat] The GML format to use to parse the response. Default is `ol/format/GML3`.\n * @property {string} [schemaLocation] Optional schemaLocation to use for serialization, this will override the default.\n */\n\n\n/**\n * @typedef {Object} WriteGetFeatureOptions\n * @property {string} featureNS The namespace URI used for features.\n * @property {string} featurePrefix The prefix for the feature namespace.\n * @property {Array.<string>} featureTypes The feature type names.\n * @property {string} [srsName] SRS name. No srsName attribute will be set on\n * geometries when this is not provided.\n * @property {string} [handle] Handle.\n * @property {string} [outputFormat] Output format.\n * @property {number} [maxFeatures] Maximum number of features to fetch.\n * @property {string} [geometryName] Geometry name to use in a BBOX filter.\n * @property {Array.<string>} [propertyNames] Optional list of property names to serialize.\n * @property {number} [startIndex] Start index to use for WFS paging. This is a\n * WFS 2.0 feature backported to WFS 1.1.0 by some Web Feature Services.\n * @property {number} [count] Number of features to retrieve when paging. This is a\n * WFS 2.0 feature backported to WFS 1.1.0 by some Web Feature Services. Please note that some\n * Web Feature Services have repurposed `maxfeatures` instead.\n * @property {module:ol/extent~Extent} [bbox] Extent to use for the BBOX filter.\n * @property {module:ol/format/filter/Filter} [filter] Filter condition. See\n * {@link module:ol/format/Filter} for more information.\n * @property {string} [resultType] Indicates what response should be returned,\n * E.g. `hits` only includes the `numberOfFeatures` attribute in the response and no features.\n */\n\n\n/**\n * @typedef {Object} WriteTransactionOptions\n * @property {string} featureNS The namespace URI used for features.\n * @property {string} featurePrefix The prefix for the feature namespace.\n * @property {string} featureType The feature type name.\n * @property {string} [srsName] SRS name. No srsName attribute will be set on\n * geometries when this is not provided.\n * @property {string} [handle] Handle.\n * @property {boolean} [hasZ] Must be set to true if the transaction is for\n * a 3D layer. This will allow the Z coordinate to be included in the transaction.\n * @property {Array.<Object>} nativeElements Native elements. Currently not supported.\n * @property {module:ol/format/GMLBase~Options} [gmlOptions] GML options for the WFS transaction writer.\n * @property {string} [version='1.1.0'] WFS version to use for the transaction. Can be either `1.0.0` or `1.1.0`.\n */\n\n\n/**\n * Number of features; bounds/extent.\n * @typedef {Object} FeatureCollectionMetadata\n * @property {number} numberOfFeatures\n * @property {module:ol/extent~Extent} bounds\n */\n\n\n/**\n * Total deleted; total inserted; total updated; array of insert ids.\n * @typedef {Object} TransactionResponse\n * @property {number} totalDeleted\n * @property {number} totalInserted\n * @property {number} totalUpdated\n * @property {Array.<string>} insertIds\n */\n\n\n/**\n * @type {string}\n */\nconst FEATURE_PREFIX = 'feature';\n\n\n/**\n * @type {string}\n */\nconst XMLNS = 'http://www.w3.org/2000/xmlns/';\n\n\n/**\n * @type {string}\n */\nconst OGCNS = 'http://www.opengis.net/ogc';\n\n\n/**\n * @type {string}\n */\nconst WFSNS = 'http://www.opengis.net/wfs';\n\n\n/**\n * @type {string}\n */\nconst FESNS = 'http://www.opengis.net/fes';\n\n\n/**\n * @type {Object.<string, string>}\n */\nconst SCHEMA_LOCATIONS = {\n '1.1.0': 'http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.1.0/wfs.xsd',\n '1.0.0': 'http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.0.0/wfs.xsd'\n};\n\n\n/**\n * @const\n * @type {string}\n */\nconst DEFAULT_VERSION = '1.1.0';\n\n\n/**\n * @classdesc\n * Feature format for reading and writing data in the WFS format.\n * By default, supports WFS version 1.1.0. You can pass a GML format\n * as option if you want to read a WFS that contains GML2 (WFS 1.0.0).\n * Also see {@link module:ol/format/GMLBase~GMLBase} which is used by this format.\n *\n * @constructor\n * @param {module:ol/format/WFS~Options=} opt_options Optional configuration object.\n * @extends {module:ol/format/XMLFeature}\n * @api\n */\nconst WFS = function(opt_options) {\n const options = opt_options ? opt_options : {};\n\n /**\n * @private\n * @type {Array.<string>|string|undefined}\n */\n this.featureType_ = options.featureType;\n\n /**\n * @private\n * @type {Object.<string, string>|string|undefined}\n */\n this.featureNS_ = options.featureNS;\n\n /**\n * @private\n * @type {module:ol/format/GMLBase}\n */\n this.gmlFormat_ = options.gmlFormat ?\n options.gmlFormat : new GML3();\n\n /**\n * @private\n * @type {string}\n */\n this.schemaLocation_ = options.schemaLocation ?\n options.schemaLocation : SCHEMA_LOCATIONS[DEFAULT_VERSION];\n\n XMLFeature.call(this);\n};\n\ninherits(WFS, XMLFeature);\n\n\n/**\n * @return {Array.<string>|string|undefined} featureType\n */\nWFS.prototype.getFeatureType = function() {\n return this.featureType_;\n};\n\n\n/**\n * @param {Array.<string>|string|undefined} featureType Feature type(s) to parse.\n */\nWFS.prototype.setFeatureType = function(featureType) {\n this.featureType_ = featureType;\n};\n\n\n/**\n * Read all features from a WFS FeatureCollection.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nWFS.prototype.readFeatures;\n\n\n/**\n * @inheritDoc\n */\nWFS.prototype.readFeaturesFromNode = function(node, opt_options) {\n const context = /** @type {module:ol/xml~NodeStackItem} */ ({\n 'featureType': this.featureType_,\n 'featureNS': this.featureNS_\n });\n assign(context, this.getReadOptions(node, opt_options ? opt_options : {}));\n const objectStack = [context];\n this.gmlFormat_.FEATURE_COLLECTION_PARSERS[GMLNS][\n 'featureMember'] =\n makeArrayPusher(GMLBase.prototype.readFeaturesInternal);\n let features = pushParseAndPop([],\n this.gmlFormat_.FEATURE_COLLECTION_PARSERS, node,\n objectStack, this.gmlFormat_);\n if (!features) {\n features = [];\n }\n return features;\n};\n\n\n/**\n * Read transaction response of the source.\n *\n * @param {Document|Node|Object|string} source Source.\n * @return {module:ol/format/WFS~TransactionResponse|undefined} Transaction response.\n * @api\n */\nWFS.prototype.readTransactionResponse = function(source) {\n if (isDocument(source)) {\n return this.readTransactionResponseFromDocument(\n /** @type {Document} */ (source));\n } else if (isNode(source)) {\n return this.readTransactionResponseFromNode(/** @type {Node} */ (source));\n } else if (typeof source === 'string') {\n const doc = parse(source);\n return this.readTransactionResponseFromDocument(doc);\n } else {\n return undefined;\n }\n};\n\n\n/**\n * Read feature collection metadata of the source.\n *\n * @param {Document|Node|Object|string} source Source.\n * @return {module:ol/format/WFS~FeatureCollectionMetadata|undefined}\n * FeatureCollection metadata.\n * @api\n */\nWFS.prototype.readFeatureCollectionMetadata = function(source) {\n if (isDocument(source)) {\n return this.readFeatureCollectionMetadataFromDocument(\n /** @type {Document} */ (source));\n } else if (isNode(source)) {\n return this.readFeatureCollectionMetadataFromNode(\n /** @type {Node} */ (source));\n } else if (typeof source === 'string') {\n const doc = parse(source);\n return this.readFeatureCollectionMetadataFromDocument(doc);\n } else {\n return undefined;\n }\n};\n\n\n/**\n * @param {Document} doc Document.\n * @return {module:ol/format/WFS~FeatureCollectionMetadata|undefined}\n * FeatureCollection metadata.\n */\nWFS.prototype.readFeatureCollectionMetadataFromDocument = function(doc) {\n for (let n = doc.firstChild; n; n = n.nextSibling) {\n if (n.nodeType == Node.ELEMENT_NODE) {\n return this.readFeatureCollectionMetadataFromNode(n);\n }\n }\n return undefined;\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst FEATURE_COLLECTION_PARSERS = {\n 'http://www.opengis.net/gml': {\n 'boundedBy': makeObjectPropertySetter(\n GMLBase.prototype.readGeometryElement, 'bounds')\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @return {module:ol/format/WFS~FeatureCollectionMetadata|undefined}\n * FeatureCollection metadata.\n */\nWFS.prototype.readFeatureCollectionMetadataFromNode = function(node) {\n const result = {};\n const value = readNonNegativeIntegerString(\n node.getAttribute('numberOfFeatures'));\n result['numberOfFeatures'] = value;\n return pushParseAndPop(\n /** @type {module:ol/format/WFS~FeatureCollectionMetadata} */ (result),\n FEATURE_COLLECTION_PARSERS, node, [], this.gmlFormat_);\n};\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst TRANSACTION_SUMMARY_PARSERS = {\n 'http://www.opengis.net/wfs': {\n 'totalInserted': makeObjectPropertySetter(readNonNegativeInteger),\n 'totalUpdated': makeObjectPropertySetter(readNonNegativeInteger),\n 'totalDeleted': makeObjectPropertySetter(readNonNegativeInteger)\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Transaction Summary.\n */\nfunction readTransactionSummary(node, objectStack) {\n return pushParseAndPop(\n {}, TRANSACTION_SUMMARY_PARSERS, node, objectStack);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst OGC_FID_PARSERS = {\n 'http://www.opengis.net/ogc': {\n 'FeatureId': makeArrayPusher(function(node, objectStack) {\n return node.getAttribute('fid');\n })\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n */\nfunction fidParser(node, objectStack) {\n parseNode(OGC_FID_PARSERS, node, objectStack);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst INSERT_RESULTS_PARSERS = {\n 'http://www.opengis.net/wfs': {\n 'Feature': fidParser\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Array.<string>|undefined} Insert results.\n */\nfunction readInsertResults(node, objectStack) {\n return pushParseAndPop(\n [], INSERT_RESULTS_PARSERS, node, objectStack);\n}\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst TRANSACTION_RESPONSE_PARSERS = {\n 'http://www.opengis.net/wfs': {\n 'TransactionSummary': makeObjectPropertySetter(\n readTransactionSummary, 'transactionSummary'),\n 'InsertResults': makeObjectPropertySetter(\n readInsertResults, 'insertIds')\n }\n};\n\n\n/**\n * @param {Document} doc Document.\n * @return {module:ol/format/WFS~TransactionResponse|undefined} Transaction response.\n */\nWFS.prototype.readTransactionResponseFromDocument = function(doc) {\n for (let n = doc.firstChild; n; n = n.nextSibling) {\n if (n.nodeType == Node.ELEMENT_NODE) {\n return this.readTransactionResponseFromNode(n);\n }\n }\n return undefined;\n};\n\n\n/**\n * @param {Node} node Node.\n * @return {module:ol/format/WFS~TransactionResponse|undefined} Transaction response.\n */\nWFS.prototype.readTransactionResponseFromNode = function(node) {\n return pushParseAndPop(\n /** @type {module:ol/format/WFS~TransactionResponse} */({}),\n TRANSACTION_RESPONSE_PARSERS, node, []);\n};\n\n\n/**\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst QUERY_SERIALIZERS = {\n 'http://www.opengis.net/wfs': {\n 'PropertyName': makeChildAppender(writeStringTextNode)\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/Feature} feature Feature.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeFeature(node, feature, objectStack) {\n const context = objectStack[objectStack.length - 1];\n const featureType = context['featureType'];\n const featureNS = context['featureNS'];\n const gmlVersion = context['gmlVersion'];\n const child = createElementNS(featureNS, featureType);\n node.appendChild(child);\n if (gmlVersion === 2) {\n GML2.prototype.writeFeatureElement(child, feature, objectStack);\n } else {\n GML3.prototype.writeFeatureElement(child, feature, objectStack);\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {number|string} fid Feature identifier.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeOgcFidFilter(node, fid, objectStack) {\n const filter = createElementNS(OGCNS, 'Filter');\n const child = createElementNS(OGCNS, 'FeatureId');\n filter.appendChild(child);\n child.setAttribute('fid', fid);\n node.appendChild(filter);\n}\n\n\n/**\n * @param {string|undefined} featurePrefix The prefix of the feature.\n * @param {string} featureType The type of the feature.\n * @returns {string} The value of the typeName property.\n */\nfunction getTypeName(featurePrefix, featureType) {\n featurePrefix = featurePrefix ? featurePrefix : FEATURE_PREFIX;\n const prefix = featurePrefix + ':';\n // The featureType already contains the prefix.\n if (featureType.indexOf(prefix) === 0) {\n return featureType;\n } else {\n return prefix + featureType;\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/Feature} feature Feature.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeDelete(node, feature, objectStack) {\n const context = objectStack[objectStack.length - 1];\n assert(feature.getId() !== undefined, 26); // Features must have an id set\n const featureType = context['featureType'];\n const featurePrefix = context['featurePrefix'];\n const featureNS = context['featureNS'];\n const typeName = getTypeName(featurePrefix, featureType);\n node.setAttribute('typeName', typeName);\n node.setAttributeNS(XMLNS, 'xmlns:' + featurePrefix, featureNS);\n const fid = feature.getId();\n if (fid !== undefined) {\n writeOgcFidFilter(node, fid, objectStack);\n }\n}\n\n\n/**\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst TRANSACTION_SERIALIZERS = {\n 'http://www.opengis.net/wfs': {\n 'Insert': makeChildAppender(writeFeature),\n 'Update': makeChildAppender(writeUpdate),\n 'Delete': makeChildAppender(writeDelete),\n 'Property': makeChildAppender(writeProperty),\n 'Native': makeChildAppender(writeNative)\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/Feature} feature Feature.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeUpdate(node, feature, objectStack) {\n const context = objectStack[objectStack.length - 1];\n assert(feature.getId() !== undefined, 27); // Features must have an id set\n const featureType = context['featureType'];\n const featurePrefix = context['featurePrefix'];\n const featureNS = context['featureNS'];\n const typeName = getTypeName(featurePrefix, featureType);\n const geometryName = feature.getGeometryName();\n node.setAttribute('typeName', typeName);\n node.setAttributeNS(XMLNS, 'xmlns:' + featurePrefix, featureNS);\n const fid = feature.getId();\n if (fid !== undefined) {\n const keys = feature.getKeys();\n const values = [];\n for (let i = 0, ii = keys.length; i < ii; i++) {\n const value = feature.get(keys[i]);\n if (value !== undefined) {\n let name = keys[i];\n if (value instanceof Geometry) {\n name = geometryName;\n }\n values.push({name: name, value: value});\n }\n }\n pushSerializeAndPop(/** @type {module:ol/xml~NodeStackItem} */ (\n {'gmlVersion': context['gmlVersion'], node: node,\n 'hasZ': context['hasZ'], 'srsName': context['srsName']}),\n TRANSACTION_SERIALIZERS,\n makeSimpleNodeFactory('Property'), values,\n objectStack);\n writeOgcFidFilter(node, fid, objectStack);\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Object} pair Property name and value.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeProperty(node, pair, objectStack) {\n const name = createElementNS(WFSNS, 'Name');\n const context = objectStack[objectStack.length - 1];\n const gmlVersion = context['gmlVersion'];\n node.appendChild(name);\n writeStringTextNode(name, pair.name);\n if (pair.value !== undefined && pair.value !== null) {\n const value = createElementNS(WFSNS, 'Value');\n node.appendChild(value);\n if (pair.value instanceof Geometry) {\n if (gmlVersion === 2) {\n GML2.prototype.writeGeometryElement(value,\n pair.value, objectStack);\n } else {\n GML3.prototype.writeGeometryElement(value,\n pair.value, objectStack);\n }\n } else {\n writeStringTextNode(value, pair.value);\n }\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {{vendorId: string, safeToIgnore: boolean, value: string}}\n * nativeElement The native element.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeNative(node, nativeElement, objectStack) {\n if (nativeElement.vendorId) {\n node.setAttribute('vendorId', nativeElement.vendorId);\n }\n if (nativeElement.safeToIgnore !== undefined) {\n node.setAttribute('safeToIgnore', nativeElement.safeToIgnore);\n }\n if (nativeElement.value !== undefined) {\n writeStringTextNode(node, nativeElement.value);\n }\n}\n\n\n/**\n * @type {Object.<string, Object.<string, module:ol/xml~Serializer>>}\n */\nconst GETFEATURE_SERIALIZERS = {\n 'http://www.opengis.net/wfs': {\n 'Query': makeChildAppender(writeQuery)\n },\n 'http://www.opengis.net/ogc': {\n 'During': makeChildAppender(writeDuringFilter),\n 'And': makeChildAppender(writeLogicalFilter),\n 'Or': makeChildAppender(writeLogicalFilter),\n 'Not': makeChildAppender(writeNotFilter),\n 'BBOX': makeChildAppender(writeBboxFilter),\n 'Contains': makeChildAppender(writeContainsFilter),\n 'Intersects': makeChildAppender(writeIntersectsFilter),\n 'Within': makeChildAppender(writeWithinFilter),\n 'PropertyIsEqualTo': makeChildAppender(writeComparisonFilter),\n 'PropertyIsNotEqualTo': makeChildAppender(writeComparisonFilter),\n 'PropertyIsLessThan': makeChildAppender(writeComparisonFilter),\n 'PropertyIsLessThanOrEqualTo': makeChildAppender(writeComparisonFilter),\n 'PropertyIsGreaterThan': makeChildAppender(writeComparisonFilter),\n 'PropertyIsGreaterThanOrEqualTo': makeChildAppender(writeComparisonFilter),\n 'PropertyIsNull': makeChildAppender(writeIsNullFilter),\n 'PropertyIsBetween': makeChildAppender(writeIsBetweenFilter),\n 'PropertyIsLike': makeChildAppender(writeIsLikeFilter)\n }\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {string} featureType Feature type.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeQuery(node, featureType, objectStack) {\n const context = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n const featurePrefix = context['featurePrefix'];\n const featureNS = context['featureNS'];\n const propertyNames = context['propertyNames'];\n const srsName = context['srsName'];\n let typeName;\n // If feature prefix is not defined, we must not use the default prefix.\n if (featurePrefix) {\n typeName = getTypeName(featurePrefix, featureType);\n } else {\n typeName = featureType;\n }\n node.setAttribute('typeName', typeName);\n if (srsName) {\n node.setAttribute('srsName', srsName);\n }\n if (featureNS) {\n node.setAttributeNS(XMLNS, 'xmlns:' + featurePrefix, featureNS);\n }\n const item = /** @type {module:ol/xml~NodeStackItem} */ (assign({}, context));\n item.node = node;\n pushSerializeAndPop(item,\n QUERY_SERIALIZERS,\n makeSimpleNodeFactory('PropertyName'), propertyNames,\n objectStack);\n const filter = context['filter'];\n if (filter) {\n const child = createElementNS(OGCNS, 'Filter');\n node.appendChild(child);\n writeFilterCondition(child, filter, objectStack);\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/filter/Filter} filter Filter.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeFilterCondition(node, filter, objectStack) {\n /** @type {module:ol/xml~NodeStackItem} */\n const item = {node: node};\n pushSerializeAndPop(item,\n GETFEATURE_SERIALIZERS,\n makeSimpleNodeFactory(filter.getTagName()),\n [filter], objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/filter/Bbox} filter Filter.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeBboxFilter(node, filter, objectStack) {\n const context = objectStack[objectStack.length - 1];\n context['srsName'] = filter.srsName;\n\n writeOgcPropertyName(node, filter.geometryName);\n GML3.prototype.writeGeometryElement(node, filter.extent, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/filter/Contains} filter Filter.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeContainsFilter(node, filter, objectStack) {\n const context = objectStack[objectStack.length - 1];\n context['srsName'] = filter.srsName;\n\n writeOgcPropertyName(node, filter.geometryName);\n GML3.prototype.writeGeometryElement(node, filter.geometry, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/filter/Intersects} filter Filter.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeIntersectsFilter(node, filter, objectStack) {\n const context = objectStack[objectStack.length - 1];\n context['srsName'] = filter.srsName;\n\n writeOgcPropertyName(node, filter.geometryName);\n GML3.prototype.writeGeometryElement(node, filter.geometry, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/filter/Within} filter Filter.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeWithinFilter(node, filter, objectStack) {\n const context = objectStack[objectStack.length - 1];\n context['srsName'] = filter.srsName;\n\n writeOgcPropertyName(node, filter.geometryName);\n GML3.prototype.writeGeometryElement(node, filter.geometry, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/filter/During} filter Filter.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeDuringFilter(node, filter, objectStack) {\n\n const valueReference = createElementNS(FESNS, 'ValueReference');\n writeStringTextNode(valueReference, filter.propertyName);\n node.appendChild(valueReference);\n\n const timePeriod = createElementNS(GMLNS, 'TimePeriod');\n\n node.appendChild(timePeriod);\n\n const begin = createElementNS(GMLNS, 'begin');\n timePeriod.appendChild(begin);\n writeTimeInstant(begin, filter.begin);\n\n const end = createElementNS(GMLNS, 'end');\n timePeriod.appendChild(end);\n writeTimeInstant(end, filter.end);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/filter/LogicalNary} filter Filter.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeLogicalFilter(node, filter, objectStack) {\n /** @type {module:ol/xml~NodeStackItem} */\n const item = {node: node};\n const conditions = filter.conditions;\n for (let i = 0, ii = conditions.length; i < ii; ++i) {\n const condition = conditions[i];\n pushSerializeAndPop(item,\n GETFEATURE_SERIALIZERS,\n makeSimpleNodeFactory(condition.getTagName()),\n [condition], objectStack);\n }\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/filter/Not} filter Filter.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeNotFilter(node, filter, objectStack) {\n /** @type {module:ol/xml~NodeStackItem} */\n const item = {node: node};\n const condition = filter.condition;\n pushSerializeAndPop(item,\n GETFEATURE_SERIALIZERS,\n makeSimpleNodeFactory(condition.getTagName()),\n [condition], objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/filter/ComparisonBinary} filter Filter.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeComparisonFilter(node, filter, objectStack) {\n if (filter.matchCase !== undefined) {\n node.setAttribute('matchCase', filter.matchCase.toString());\n }\n writeOgcPropertyName(node, filter.propertyName);\n writeOgcLiteral(node, '' + filter.expression);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/filter/IsNull} filter Filter.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeIsNullFilter(node, filter, objectStack) {\n writeOgcPropertyName(node, filter.propertyName);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/filter/IsBetween} filter Filter.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeIsBetweenFilter(node, filter, objectStack) {\n writeOgcPropertyName(node, filter.propertyName);\n\n const lowerBoundary = createElementNS(OGCNS, 'LowerBoundary');\n node.appendChild(lowerBoundary);\n writeOgcLiteral(lowerBoundary, '' + filter.lowerBoundary);\n\n const upperBoundary = createElementNS(OGCNS, 'UpperBoundary');\n node.appendChild(upperBoundary);\n writeOgcLiteral(upperBoundary, '' + filter.upperBoundary);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {module:ol/format/filter/IsLike} filter Filter.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeIsLikeFilter(node, filter, objectStack) {\n node.setAttribute('wildCard', filter.wildCard);\n node.setAttribute('singleChar', filter.singleChar);\n node.setAttribute('escapeChar', filter.escapeChar);\n if (filter.matchCase !== undefined) {\n node.setAttribute('matchCase', filter.matchCase.toString());\n }\n writeOgcPropertyName(node, filter.propertyName);\n writeOgcLiteral(node, '' + filter.pattern);\n}\n\n\n/**\n * @param {string} tagName Tag name.\n * @param {Node} node Node.\n * @param {string} value Value.\n */\nfunction writeOgcExpression(tagName, node, value) {\n const property = createElementNS(OGCNS, tagName);\n writeStringTextNode(property, value);\n node.appendChild(property);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {string} value PropertyName value.\n */\nfunction writeOgcPropertyName(node, value) {\n writeOgcExpression('PropertyName', node, value);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {string} value PropertyName value.\n */\nfunction writeOgcLiteral(node, value) {\n writeOgcExpression('Literal', node, value);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {string} time PropertyName value.\n */\nfunction writeTimeInstant(node, time) {\n const timeInstant = createElementNS(GMLNS, 'TimeInstant');\n node.appendChild(timeInstant);\n\n const timePosition = createElementNS(GMLNS, 'timePosition');\n timeInstant.appendChild(timePosition);\n writeStringTextNode(timePosition, time);\n}\n\n\n/**\n * Encode filter as WFS `Filter` and return the Node.\n *\n * @param {module:ol/format/filter/Filter} filter Filter.\n * @return {Node} Result.\n * @api\n */\nexport function writeFilter(filter) {\n const child = createElementNS(OGCNS, 'Filter');\n writeFilterCondition(child, filter, []);\n return child;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<string>} featureTypes Feature types.\n * @param {Array.<*>} objectStack Node stack.\n */\nfunction writeGetFeature(node, featureTypes, objectStack) {\n const context = /** @type {Object} */ (objectStack[objectStack.length - 1]);\n const item = /** @type {module:ol/xml~NodeStackItem} */ (assign({}, context));\n item.node = node;\n pushSerializeAndPop(item,\n GETFEATURE_SERIALIZERS,\n makeSimpleNodeFactory('Query'), featureTypes,\n objectStack);\n}\n\n\n/**\n * Encode format as WFS `GetFeature` and return the Node.\n *\n * @param {module:ol/format/WFS~WriteGetFeatureOptions} options Options.\n * @return {Node} Result.\n * @api\n */\nWFS.prototype.writeGetFeature = function(options) {\n const node = createElementNS(WFSNS, 'GetFeature');\n node.setAttribute('service', 'WFS');\n node.setAttribute('version', '1.1.0');\n let filter;\n if (options) {\n if (options.handle) {\n node.setAttribute('handle', options.handle);\n }\n if (options.outputFormat) {\n node.setAttribute('outputFormat', options.outputFormat);\n }\n if (options.maxFeatures !== undefined) {\n node.setAttribute('maxFeatures', options.maxFeatures);\n }\n if (options.resultType) {\n node.setAttribute('resultType', options.resultType);\n }\n if (options.startIndex !== undefined) {\n node.setAttribute('startIndex', options.startIndex);\n }\n if (options.count !== undefined) {\n node.setAttribute('count', options.count);\n }\n filter = options.filter;\n if (options.bbox) {\n assert(options.geometryName,\n 12); // `options.geometryName` must also be provided when `options.bbox` is set\n const bbox = bboxFilter(\n /** @type {string} */ (options.geometryName), options.bbox, options.srsName);\n if (filter) {\n // if bbox and filter are both set, combine the two into a single filter\n filter = andFilter(filter, bbox);\n } else {\n filter = bbox;\n }\n }\n }\n node.setAttributeNS(XML_SCHEMA_INSTANCE_URI, 'xsi:schemaLocation', this.schemaLocation_);\n /** @type {module:ol/xml~NodeStackItem} */\n const context = {\n node: node,\n 'srsName': options.srsName,\n 'featureNS': options.featureNS ? options.featureNS : this.featureNS_,\n 'featurePrefix': options.featurePrefix,\n 'geometryName': options.geometryName,\n 'filter': filter,\n 'propertyNames': options.propertyNames ? options.propertyNames : []\n };\n assert(Array.isArray(options.featureTypes),\n 11); // `options.featureTypes` should be an Array\n writeGetFeature(node, /** @type {!Array.<string>} */ (options.featureTypes), [context]);\n return node;\n};\n\n\n/**\n * Encode format as WFS `Transaction` and return the Node.\n *\n * @param {Array.<module:ol/Feature>} inserts The features to insert.\n * @param {Array.<module:ol/Feature>} updates The features to update.\n * @param {Array.<module:ol/Feature>} deletes The features to delete.\n * @param {module:ol/format/WFS~WriteTransactionOptions} options Write options.\n * @return {Node} Result.\n * @api\n */\nWFS.prototype.writeTransaction = function(inserts, updates, deletes, options) {\n const objectStack = [];\n const node = createElementNS(WFSNS, 'Transaction');\n const version = options.version ? options.version : DEFAULT_VERSION;\n const gmlVersion = version === '1.0.0' ? 2 : 3;\n node.setAttribute('service', 'WFS');\n node.setAttribute('version', version);\n let baseObj;\n /** @type {module:ol/xml~NodeStackItem} */\n let obj;\n if (options) {\n baseObj = options.gmlOptions ? options.gmlOptions : {};\n if (options.handle) {\n node.setAttribute('handle', options.handle);\n }\n }\n const schemaLocation = SCHEMA_LOCATIONS[version];\n node.setAttributeNS(XML_SCHEMA_INSTANCE_URI, 'xsi:schemaLocation', schemaLocation);\n const featurePrefix = options.featurePrefix ? options.featurePrefix : FEATURE_PREFIX;\n if (inserts) {\n obj = {node: node, 'featureNS': options.featureNS,\n 'featureType': options.featureType, 'featurePrefix': featurePrefix,\n 'gmlVersion': gmlVersion, 'hasZ': options.hasZ, 'srsName': options.srsName};\n assign(obj, baseObj);\n pushSerializeAndPop(obj,\n TRANSACTION_SERIALIZERS,\n makeSimpleNodeFactory('Insert'), inserts,\n objectStack);\n }\n if (updates) {\n obj = {node: node, 'featureNS': options.featureNS,\n 'featureType': options.featureType, 'featurePrefix': featurePrefix,\n 'gmlVersion': gmlVersion, 'hasZ': options.hasZ, 'srsName': options.srsName};\n assign(obj, baseObj);\n pushSerializeAndPop(obj,\n TRANSACTION_SERIALIZERS,\n makeSimpleNodeFactory('Update'), updates,\n objectStack);\n }\n if (deletes) {\n pushSerializeAndPop({node: node, 'featureNS': options.featureNS,\n 'featureType': options.featureType, 'featurePrefix': featurePrefix,\n 'gmlVersion': gmlVersion, 'srsName': options.srsName},\n TRANSACTION_SERIALIZERS,\n makeSimpleNodeFactory('Delete'), deletes,\n objectStack);\n }\n if (options.nativeElements) {\n pushSerializeAndPop({node: node, 'featureNS': options.featureNS,\n 'featureType': options.featureType, 'featurePrefix': featurePrefix,\n 'gmlVersion': gmlVersion, 'srsName': options.srsName},\n TRANSACTION_SERIALIZERS,\n makeSimpleNodeFactory('Native'), options.nativeElements,\n objectStack);\n }\n return node;\n};\n\n\n/**\n * Read the projection from a WFS source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @return {?module:ol/proj/Projection} Projection.\n * @api\n */\nWFS.prototype.readProjection;\n\n\n/**\n * @inheritDoc\n */\nWFS.prototype.readProjectionFromDocument = function(doc) {\n for (let n = doc.firstChild; n; n = n.nextSibling) {\n if (n.nodeType == Node.ELEMENT_NODE) {\n return this.readProjectionFromNode(n);\n }\n }\n return null;\n};\n\n\n/**\n * @inheritDoc\n */\nWFS.prototype.readProjectionFromNode = function(node) {\n if (node.firstElementChild &&\n node.firstElementChild.firstElementChild) {\n node = node.firstElementChild.firstElementChild;\n for (let n = node.firstElementChild; n; n = n.nextElementSibling) {\n if (!(n.childNodes.length === 0 ||\n (n.childNodes.length === 1 &&\n n.firstChild.nodeType === 3))) {\n const objectStack = [{}];\n this.gmlFormat_.readGeometryElement(n, objectStack);\n return getProjection(objectStack.pop().srsName);\n }\n }\n }\n\n return null;\n};\nexport default WFS;\n","/**\n * @module ol/format/WKT\n */\nimport {inherits} from '../util.js';\nimport Feature from '../Feature.js';\nimport {transformWithOptions} from '../format/Feature.js';\nimport TextFeature from '../format/TextFeature.js';\nimport GeometryCollection from '../geom/GeometryCollection.js';\nimport GeometryType from '../geom/GeometryType.js';\nimport GeometryLayout from '../geom/GeometryLayout.js';\nimport LineString from '../geom/LineString.js';\nimport MultiLineString from '../geom/MultiLineString.js';\nimport MultiPoint from '../geom/MultiPoint.js';\nimport MultiPolygon from '../geom/MultiPolygon.js';\nimport Point from '../geom/Point.js';\nimport Polygon from '../geom/Polygon.js';\nimport SimpleGeometry from '../geom/SimpleGeometry.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [splitCollection=false] Whether to split GeometryCollections into\n * multiple features on reading.\n */\n\n/**\n * @typedef {Object} Token\n * @property {number} type\n * @property {number|string} [value]\n * @property {number} position\n */\n\n/**\n * @const\n * @type {string}\n */\nconst EMPTY = 'EMPTY';\n\n\n/**\n * @const\n * @type {string}\n */\nconst Z = 'Z';\n\n\n/**\n * @const\n * @type {string}\n */\nconst M = 'M';\n\n\n/**\n * @const\n * @type {string}\n */\nconst ZM = 'ZM';\n\n\n/**\n * @const\n * @enum {number}\n */\nconst TokenType = {\n TEXT: 1,\n LEFT_PAREN: 2,\n RIGHT_PAREN: 3,\n NUMBER: 4,\n COMMA: 5,\n EOF: 6\n};\n\n\n/**\n * Class to tokenize a WKT string.\n * @param {string} wkt WKT string.\n * @constructor\n */\nconst Lexer = function(wkt) {\n\n /**\n * @type {string}\n */\n this.wkt = wkt;\n\n /**\n * @type {number}\n * @private\n */\n this.index_ = -1;\n};\n\n\n/**\n * @param {string} c Character.\n * @return {boolean} Whether the character is alphabetic.\n * @private\n */\nLexer.prototype.isAlpha_ = function(c) {\n return c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z';\n};\n\n\n/**\n * @param {string} c Character.\n * @param {boolean=} opt_decimal Whether the string number\n * contains a dot, i.e. is a decimal number.\n * @return {boolean} Whether the character is numeric.\n * @private\n */\nLexer.prototype.isNumeric_ = function(c, opt_decimal) {\n const decimal = opt_decimal !== undefined ? opt_decimal : false;\n return c >= '0' && c <= '9' || c == '.' && !decimal;\n};\n\n\n/**\n * @param {string} c Character.\n * @return {boolean} Whether the character is whitespace.\n * @private\n */\nLexer.prototype.isWhiteSpace_ = function(c) {\n return c == ' ' || c == '\\t' || c == '\\r' || c == '\\n';\n};\n\n\n/**\n * @return {string} Next string character.\n * @private\n */\nLexer.prototype.nextChar_ = function() {\n return this.wkt.charAt(++this.index_);\n};\n\n\n/**\n * Fetch and return the next token.\n * @return {!module:ol/format/WKT~Token} Next string token.\n */\nLexer.prototype.nextToken = function() {\n const c = this.nextChar_();\n const token = {position: this.index_, value: c};\n\n if (c == '(') {\n token.type = TokenType.LEFT_PAREN;\n } else if (c == ',') {\n token.type = TokenType.COMMA;\n } else if (c == ')') {\n token.type = TokenType.RIGHT_PAREN;\n } else if (this.isNumeric_(c) || c == '-') {\n token.type = TokenType.NUMBER;\n token.value = this.readNumber_();\n } else if (this.isAlpha_(c)) {\n token.type = TokenType.TEXT;\n token.value = this.readText_();\n } else if (this.isWhiteSpace_(c)) {\n return this.nextToken();\n } else if (c === '') {\n token.type = TokenType.EOF;\n } else {\n throw new Error('Unexpected character: ' + c);\n }\n\n return token;\n};\n\n\n/**\n * @return {number} Numeric token value.\n * @private\n */\nLexer.prototype.readNumber_ = function() {\n let c;\n const index = this.index_;\n let decimal = false;\n let scientificNotation = false;\n do {\n if (c == '.') {\n decimal = true;\n } else if (c == 'e' || c == 'E') {\n scientificNotation = true;\n }\n c = this.nextChar_();\n } while (\n this.isNumeric_(c, decimal) ||\n // if we haven't detected a scientific number before, 'e' or 'E'\n // hint that we should continue to read\n !scientificNotation && (c == 'e' || c == 'E') ||\n // once we know that we have a scientific number, both '-' and '+'\n // are allowed\n scientificNotation && (c == '-' || c == '+')\n );\n return parseFloat(this.wkt.substring(index, this.index_--));\n};\n\n\n/**\n * @return {string} String token value.\n * @private\n */\nLexer.prototype.readText_ = function() {\n let c;\n const index = this.index_;\n do {\n c = this.nextChar_();\n } while (this.isAlpha_(c));\n return this.wkt.substring(index, this.index_--).toUpperCase();\n};\n\n\n/**\n * Class to parse the tokens from the WKT string.\n * @param {module:ol/format/WKT~Lexer} lexer The lexer.\n * @constructor\n */\nconst Parser = function(lexer) {\n\n /**\n * @type {module:ol/format/WKT~Lexer}\n * @private\n */\n this.lexer_ = lexer;\n\n /**\n * @type {module:ol/format/WKT~Token}\n * @private\n */\n this.token_;\n\n /**\n * @type {module:ol/geom/GeometryLayout}\n * @private\n */\n this.layout_ = GeometryLayout.XY;\n};\n\n\n/**\n * Fetch the next token form the lexer and replace the active token.\n * @private\n */\nParser.prototype.consume_ = function() {\n this.token_ = this.lexer_.nextToken();\n};\n\n/**\n * Tests if the given type matches the type of the current token.\n * @param {module:ol/format/WKT~TokenType} type Token type.\n * @return {boolean} Whether the token matches the given type.\n */\nParser.prototype.isTokenType = function(type) {\n const isMatch = this.token_.type == type;\n return isMatch;\n};\n\n\n/**\n * If the given type matches the current token, consume it.\n * @param {module:ol/format/WKT~TokenType} type Token type.\n * @return {boolean} Whether the token matches the given type.\n */\nParser.prototype.match = function(type) {\n const isMatch = this.isTokenType(type);\n if (isMatch) {\n this.consume_();\n }\n return isMatch;\n};\n\n\n/**\n * Try to parse the tokens provided by the lexer.\n * @return {module:ol/geom/Geometry} The geometry.\n */\nParser.prototype.parse = function() {\n this.consume_();\n const geometry = this.parseGeometry_();\n return geometry;\n};\n\n\n/**\n * Try to parse the dimensional info.\n * @return {module:ol/geom/GeometryLayout} The layout.\n * @private\n */\nParser.prototype.parseGeometryLayout_ = function() {\n let layout = GeometryLayout.XY;\n const dimToken = this.token_;\n if (this.isTokenType(TokenType.TEXT)) {\n const dimInfo = dimToken.value;\n if (dimInfo === Z) {\n layout = GeometryLayout.XYZ;\n } else if (dimInfo === M) {\n layout = GeometryLayout.XYM;\n } else if (dimInfo === ZM) {\n layout = GeometryLayout.XYZM;\n }\n if (layout !== GeometryLayout.XY) {\n this.consume_();\n }\n }\n return layout;\n};\n\n\n/**\n * @return {!Array.<module:ol/geom/Geometry>} A collection of geometries.\n * @private\n */\nParser.prototype.parseGeometryCollectionText_ = function() {\n if (this.match(TokenType.LEFT_PAREN)) {\n const geometries = [];\n do {\n geometries.push(this.parseGeometry_());\n } while (this.match(TokenType.COMMA));\n if (this.match(TokenType.RIGHT_PAREN)) {\n return geometries;\n }\n } else if (this.isEmptyGeometry_()) {\n return [];\n }\n throw new Error(this.formatErrorMessage_());\n};\n\n\n/**\n * @return {Array.<number>} All values in a point.\n * @private\n */\nParser.prototype.parsePointText_ = function() {\n if (this.match(TokenType.LEFT_PAREN)) {\n const coordinates = this.parsePoint_();\n if (this.match(TokenType.RIGHT_PAREN)) {\n return coordinates;\n }\n } else if (this.isEmptyGeometry_()) {\n return null;\n }\n throw new Error(this.formatErrorMessage_());\n};\n\n\n/**\n * @return {!Array.<!Array.<number>>} All points in a linestring.\n * @private\n */\nParser.prototype.parseLineStringText_ = function() {\n if (this.match(TokenType.LEFT_PAREN)) {\n const coordinates = this.parsePointList_();\n if (this.match(TokenType.RIGHT_PAREN)) {\n return coordinates;\n }\n } else if (this.isEmptyGeometry_()) {\n return [];\n }\n throw new Error(this.formatErrorMessage_());\n};\n\n\n/**\n * @return {!Array.<!Array.<number>>} All points in a polygon.\n * @private\n */\nParser.prototype.parsePolygonText_ = function() {\n if (this.match(TokenType.LEFT_PAREN)) {\n const coordinates = this.parseLineStringTextList_();\n if (this.match(TokenType.RIGHT_PAREN)) {\n return coordinates;\n }\n } else if (this.isEmptyGeometry_()) {\n return [];\n }\n throw new Error(this.formatErrorMessage_());\n};\n\n\n/**\n * @return {!Array.<!Array.<number>>} All points in a multipoint.\n * @private\n */\nParser.prototype.parseMultiPointText_ = function() {\n if (this.match(TokenType.LEFT_PAREN)) {\n let coordinates;\n if (this.token_.type == TokenType.LEFT_PAREN) {\n coordinates = this.parsePointTextList_();\n } else {\n coordinates = this.parsePointList_();\n }\n if (this.match(TokenType.RIGHT_PAREN)) {\n return coordinates;\n }\n } else if (this.isEmptyGeometry_()) {\n return [];\n }\n throw new Error(this.formatErrorMessage_());\n};\n\n\n/**\n * @return {!Array.<!Array.<number>>} All linestring points\n * in a multilinestring.\n * @private\n */\nParser.prototype.parseMultiLineStringText_ = function() {\n if (this.match(TokenType.LEFT_PAREN)) {\n const coordinates = this.parseLineStringTextList_();\n if (this.match(TokenType.RIGHT_PAREN)) {\n return coordinates;\n }\n } else if (this.isEmptyGeometry_()) {\n return [];\n }\n throw new Error(this.formatErrorMessage_());\n};\n\n\n/**\n * @return {!Array.<!Array.<number>>} All polygon points in a multipolygon.\n * @private\n */\nParser.prototype.parseMultiPolygonText_ = function() {\n if (this.match(TokenType.LEFT_PAREN)) {\n const coordinates = this.parsePolygonTextList_();\n if (this.match(TokenType.RIGHT_PAREN)) {\n return coordinates;\n }\n } else if (this.isEmptyGeometry_()) {\n return [];\n }\n throw new Error(this.formatErrorMessage_());\n};\n\n\n/**\n * @return {!Array.<number>} A point.\n * @private\n */\nParser.prototype.parsePoint_ = function() {\n const coordinates = [];\n const dimensions = this.layout_.length;\n for (let i = 0; i < dimensions; ++i) {\n const token = this.token_;\n if (this.match(TokenType.NUMBER)) {\n coordinates.push(token.value);\n } else {\n break;\n }\n }\n if (coordinates.length == dimensions) {\n return coordinates;\n }\n throw new Error(this.formatErrorMessage_());\n};\n\n\n/**\n * @return {!Array.<!Array.<number>>} An array of points.\n * @private\n */\nParser.prototype.parsePointList_ = function() {\n const coordinates = [this.parsePoint_()];\n while (this.match(TokenType.COMMA)) {\n coordinates.push(this.parsePoint_());\n }\n return coordinates;\n};\n\n\n/**\n * @return {!Array.<!Array.<number>>} An array of points.\n * @private\n */\nParser.prototype.parsePointTextList_ = function() {\n const coordinates = [this.parsePointText_()];\n while (this.match(TokenType.COMMA)) {\n coordinates.push(this.parsePointText_());\n }\n return coordinates;\n};\n\n\n/**\n * @return {!Array.<!Array.<number>>} An array of points.\n * @private\n */\nParser.prototype.parseLineStringTextList_ = function() {\n const coordinates = [this.parseLineStringText_()];\n while (this.match(TokenType.COMMA)) {\n coordinates.push(this.parseLineStringText_());\n }\n return coordinates;\n};\n\n\n/**\n * @return {!Array.<!Array.<number>>} An array of points.\n * @private\n */\nParser.prototype.parsePolygonTextList_ = function() {\n const coordinates = [this.parsePolygonText_()];\n while (this.match(TokenType.COMMA)) {\n coordinates.push(this.parsePolygonText_());\n }\n return coordinates;\n};\n\n\n/**\n * @return {boolean} Whether the token implies an empty geometry.\n * @private\n */\nParser.prototype.isEmptyGeometry_ = function() {\n const isEmpty = this.isTokenType(TokenType.TEXT) &&\n this.token_.value == EMPTY;\n if (isEmpty) {\n this.consume_();\n }\n return isEmpty;\n};\n\n\n/**\n * Create an error message for an unexpected token error.\n * @return {string} Error message.\n * @private\n */\nParser.prototype.formatErrorMessage_ = function() {\n return 'Unexpected `' + this.token_.value + '` at position ' +\n this.token_.position + ' in `' + this.lexer_.wkt + '`';\n};\n\n\n/**\n * @classdesc\n * Geometry format for reading and writing data in the `WellKnownText` (WKT)\n * format.\n *\n * @constructor\n * @extends {module:ol/format/TextFeature}\n * @param {module:ol/format/WKT~Options=} opt_options Options.\n * @api\n */\nconst WKT = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n TextFeature.call(this);\n\n /**\n * Split GeometryCollection into multiple features.\n * @type {boolean}\n * @private\n */\n this.splitCollection_ = options.splitCollection !== undefined ?\n options.splitCollection : false;\n\n};\n\ninherits(WKT, TextFeature);\n\n\n/**\n * @param {module:ol/geom/Point} geom Point geometry.\n * @return {string} Coordinates part of Point as WKT.\n */\nfunction encodePointGeometry(geom) {\n const coordinates = geom.getCoordinates();\n if (coordinates.length === 0) {\n return '';\n }\n return coordinates.join(' ');\n}\n\n\n/**\n * @param {module:ol/geom/MultiPoint} geom MultiPoint geometry.\n * @return {string} Coordinates part of MultiPoint as WKT.\n */\nfunction encodeMultiPointGeometry(geom) {\n const array = [];\n const components = geom.getPoints();\n for (let i = 0, ii = components.length; i < ii; ++i) {\n array.push('(' + encodePointGeometry(components[i]) + ')');\n }\n return array.join(',');\n}\n\n\n/**\n * @param {module:ol/geom/GeometryCollection} geom GeometryCollection geometry.\n * @return {string} Coordinates part of GeometryCollection as WKT.\n */\nfunction encodeGeometryCollectionGeometry(geom) {\n const array = [];\n const geoms = geom.getGeometries();\n for (let i = 0, ii = geoms.length; i < ii; ++i) {\n array.push(encode(geoms[i]));\n }\n return array.join(',');\n}\n\n\n/**\n * @param {module:ol/geom/LineString|module:ol/geom/LinearRing} geom LineString geometry.\n * @return {string} Coordinates part of LineString as WKT.\n */\nfunction encodeLineStringGeometry(geom) {\n const coordinates = geom.getCoordinates();\n const array = [];\n for (let i = 0, ii = coordinates.length; i < ii; ++i) {\n array.push(coordinates[i].join(' '));\n }\n return array.join(',');\n}\n\n\n/**\n * @param {module:ol/geom/MultiLineString} geom MultiLineString geometry.\n * @return {string} Coordinates part of MultiLineString as WKT.\n */\nfunction encodeMultiLineStringGeometry(geom) {\n const array = [];\n const components = geom.getLineStrings();\n for (let i = 0, ii = components.length; i < ii; ++i) {\n array.push('(' + encodeLineStringGeometry(components[i]) + ')');\n }\n return array.join(',');\n}\n\n\n/**\n * @param {module:ol/geom/Polygon} geom Polygon geometry.\n * @return {string} Coordinates part of Polygon as WKT.\n */\nfunction encodePolygonGeometry(geom) {\n const array = [];\n const rings = geom.getLinearRings();\n for (let i = 0, ii = rings.length; i < ii; ++i) {\n array.push('(' + encodeLineStringGeometry(rings[i]) + ')');\n }\n return array.join(',');\n}\n\n\n/**\n * @param {module:ol/geom/MultiPolygon} geom MultiPolygon geometry.\n * @return {string} Coordinates part of MultiPolygon as WKT.\n */\nfunction encodeMultiPolygonGeometry(geom) {\n const array = [];\n const components = geom.getPolygons();\n for (let i = 0, ii = components.length; i < ii; ++i) {\n array.push('(' + encodePolygonGeometry(components[i]) + ')');\n }\n return array.join(',');\n}\n\n/**\n * @param {module:ol/geom/SimpleGeometry} geom SimpleGeometry geometry.\n * @return {string} Potential dimensional information for WKT type.\n */\nfunction encodeGeometryLayout(geom) {\n const layout = geom.getLayout();\n let dimInfo = '';\n if (layout === GeometryLayout.XYZ || layout === GeometryLayout.XYZM) {\n dimInfo += Z;\n }\n if (layout === GeometryLayout.XYM || layout === GeometryLayout.XYZM) {\n dimInfo += M;\n }\n return dimInfo;\n}\n\n\n/**\n * @const\n * @type {Object.<string, function(module:ol/geom/Geometry): string>}\n */\nconst GeometryEncoder = {\n 'Point': encodePointGeometry,\n 'LineString': encodeLineStringGeometry,\n 'Polygon': encodePolygonGeometry,\n 'MultiPoint': encodeMultiPointGeometry,\n 'MultiLineString': encodeMultiLineStringGeometry,\n 'MultiPolygon': encodeMultiPolygonGeometry,\n 'GeometryCollection': encodeGeometryCollectionGeometry\n};\n\n\n/**\n * Encode a geometry as WKT.\n * @param {module:ol/geom/Geometry} geom The geometry to encode.\n * @return {string} WKT string for the geometry.\n */\nfunction encode(geom) {\n let type = geom.getType();\n const geometryEncoder = GeometryEncoder[type];\n const enc = geometryEncoder(geom);\n type = type.toUpperCase();\n if (geom instanceof SimpleGeometry) {\n const dimInfo = encodeGeometryLayout(geom);\n if (dimInfo.length > 0) {\n type += ' ' + dimInfo;\n }\n }\n if (enc.length === 0) {\n return type + ' ' + EMPTY;\n }\n return type + '(' + enc + ')';\n}\n\n\n/**\n * Parse a WKT string.\n * @param {string} wkt WKT string.\n * @return {module:ol/geom/Geometry|undefined}\n * The geometry created.\n * @private\n */\nWKT.prototype.parse_ = function(wkt) {\n const lexer = new Lexer(wkt);\n const parser = new Parser(lexer);\n return parser.parse();\n};\n\n\n/**\n * Read a feature from a WKT source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/Feature} Feature.\n * @api\n */\nWKT.prototype.readFeature;\n\n\n/**\n * @inheritDoc\n */\nWKT.prototype.readFeatureFromText = function(text, opt_options) {\n const geom = this.readGeometryFromText(text, opt_options);\n if (geom) {\n const feature = new Feature();\n feature.setGeometry(geom);\n return feature;\n }\n return null;\n};\n\n\n/**\n * Read all features from a WKT source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nWKT.prototype.readFeatures;\n\n\n/**\n * @inheritDoc\n */\nWKT.prototype.readFeaturesFromText = function(text, opt_options) {\n let geometries = [];\n const geometry = this.readGeometryFromText(text, opt_options);\n if (this.splitCollection_ &&\n geometry.getType() == GeometryType.GEOMETRY_COLLECTION) {\n geometries = (/** @type {module:ol/geom/GeometryCollection} */ (geometry))\n .getGeometriesArray();\n } else {\n geometries = [geometry];\n }\n const features = [];\n for (let i = 0, ii = geometries.length; i < ii; ++i) {\n const feature = new Feature();\n feature.setGeometry(geometries[i]);\n features.push(feature);\n }\n return features;\n};\n\n\n/**\n * Read a single geometry from a WKT source.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Read options.\n * @return {module:ol/geom/Geometry} Geometry.\n * @api\n */\nWKT.prototype.readGeometry;\n\n\n/**\n * @inheritDoc\n */\nWKT.prototype.readGeometryFromText = function(text, opt_options) {\n const geometry = this.parse_(text);\n if (geometry) {\n return (\n /** @type {module:ol/geom/Geometry} */ (transformWithOptions(geometry, false, opt_options))\n );\n } else {\n return null;\n }\n};\n\n\n/**\n * @enum {function (new:module:ol/geom/Geometry, Array, module:ol/geom/GeometryLayout)}\n */\nconst GeometryConstructor = {\n 'POINT': Point,\n 'LINESTRING': LineString,\n 'POLYGON': Polygon,\n 'MULTIPOINT': MultiPoint,\n 'MULTILINESTRING': MultiLineString,\n 'MULTIPOLYGON': MultiPolygon\n};\n\n\n/**\n * @enum {(function(): Array)}\n */\nconst GeometryParser = {\n 'POINT': Parser.prototype.parsePointText_,\n 'LINESTRING': Parser.prototype.parseLineStringText_,\n 'POLYGON': Parser.prototype.parsePolygonText_,\n 'MULTIPOINT': Parser.prototype.parseMultiPointText_,\n 'MULTILINESTRING': Parser.prototype.parseMultiLineStringText_,\n 'MULTIPOLYGON': Parser.prototype.parseMultiPolygonText_\n};\n\n\n/**\n * @return {!module:ol/geom/Geometry} The geometry.\n * @private\n */\nParser.prototype.parseGeometry_ = function() {\n const token = this.token_;\n if (this.match(TokenType.TEXT)) {\n const geomType = token.value;\n this.layout_ = this.parseGeometryLayout_();\n if (geomType == GeometryType.GEOMETRY_COLLECTION.toUpperCase()) {\n const geometries = this.parseGeometryCollectionText_();\n return new GeometryCollection(geometries);\n } else {\n const parser = GeometryParser[geomType];\n const ctor = GeometryConstructor[geomType];\n if (!parser || !ctor) {\n throw new Error('Invalid geometry type: ' + geomType);\n }\n const coordinates = parser.call(this);\n return new ctor(coordinates, this.layout_);\n }\n }\n throw new Error(this.formatErrorMessage_());\n};\n\n\n/**\n * Encode a feature as a WKT string.\n *\n * @function\n * @param {module:ol/Feature} feature Feature.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} WKT string.\n * @api\n */\nWKT.prototype.writeFeature;\n\n\n/**\n * @inheritDoc\n */\nWKT.prototype.writeFeatureText = function(feature, opt_options) {\n const geometry = feature.getGeometry();\n if (geometry) {\n return this.writeGeometryText(geometry, opt_options);\n }\n return '';\n};\n\n\n/**\n * Encode an array of features as a WKT string.\n *\n * @function\n * @param {Array.<module:ol/Feature>} features Features.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} WKT string.\n * @api\n */\nWKT.prototype.writeFeatures;\n\n\n/**\n * @inheritDoc\n */\nWKT.prototype.writeFeaturesText = function(features, opt_options) {\n if (features.length == 1) {\n return this.writeFeatureText(features[0], opt_options);\n }\n const geometries = [];\n for (let i = 0, ii = features.length; i < ii; ++i) {\n geometries.push(features[i].getGeometry());\n }\n const collection = new GeometryCollection(geometries);\n return this.writeGeometryText(collection, opt_options);\n};\n\n\n/**\n * Write a single geometry as a WKT string.\n *\n * @function\n * @param {module:ol/geom/Geometry} geometry Geometry.\n * @param {module:ol/format/Feature~WriteOptions=} opt_options Write options.\n * @return {string} WKT string.\n * @api\n */\nWKT.prototype.writeGeometry;\n\n\n/**\n * @inheritDoc\n */\nWKT.prototype.writeGeometryText = function(geometry, opt_options) {\n return encode(/** @type {module:ol/geom/Geometry} */ (\n transformWithOptions(geometry, true, opt_options)));\n};\n\n\nexport default WKT;\n","/**\n * @module ol/format/XLink\n */\n\n\n/**\n * @const\n * @type {string}\n */\nconst NAMESPACE_URI = 'http://www.w3.org/1999/xlink';\n\n\n/**\n * @param {Node} node Node.\n * @return {boolean|undefined} Boolean.\n */\nexport function readHref(node) {\n return node.getAttributeNS(NAMESPACE_URI, 'href');\n}\n","/**\n * @module ol/format/XML\n */\nimport {isDocument, isNode, parse} from '../xml.js';\n\n/**\n * @classdesc\n * Generic format for reading non-feature XML data\n *\n * @constructor\n * @abstract\n * @struct\n */\nconst XML = function() {\n};\n\n\n/**\n * @param {Document|Node|string} source Source.\n * @return {Object} The parsed result.\n */\nXML.prototype.read = function(source) {\n if (isDocument(source)) {\n return this.readFromDocument(/** @type {Document} */ (source));\n } else if (isNode(source)) {\n return this.readFromNode(/** @type {Node} */ (source));\n } else if (typeof source === 'string') {\n const doc = parse(source);\n return this.readFromDocument(doc);\n } else {\n return null;\n }\n};\n\n\n/**\n * @abstract\n * @param {Document} doc Document.\n * @return {Object} Object\n */\nXML.prototype.readFromDocument = function(doc) {};\n\n\n/**\n * @abstract\n * @param {Node} node Node.\n * @return {Object} Object\n */\nXML.prototype.readFromNode = function(node) {};\nexport default XML;\n","/**\n * @module ol/format/WMSCapabilities\n */\nimport {inherits} from '../util.js';\nimport {readHref} from '../format/XLink.js';\nimport XML from '../format/XML.js';\nimport {readDecimalString, readString, readNonNegativeInteger, readDecimal, readBooleanString, readNonNegativeIntegerString} from '../format/xsd.js';\nimport {makeArrayPusher, makeObjectPropertyPusher, makeObjectPropertySetter,\n makeStructureNS, pushParseAndPop} from '../xml.js';\n\n\n/**\n * @classdesc\n * Format for reading WMS capabilities data\n *\n * @constructor\n * @extends {module:ol/format/XML}\n * @api\n */\nconst WMSCapabilities = function() {\n\n XML.call(this);\n\n /**\n * @type {string|undefined}\n */\n this.version = undefined;\n};\n\ninherits(WMSCapabilities, XML);\n\n\n/**\n * @const\n * @type {Array.<null|string>}\n */\nconst NAMESPACE_URIS = [\n null,\n 'http://www.opengis.net/wms'\n];\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Service': makeObjectPropertySetter(readService),\n 'Capability': makeObjectPropertySetter(readCapability)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst CAPABILITY_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Request': makeObjectPropertySetter(readRequest),\n 'Exception': makeObjectPropertySetter(readException),\n 'Layer': makeObjectPropertySetter(readCapabilityLayer)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst SERVICE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Name': makeObjectPropertySetter(readString),\n 'Title': makeObjectPropertySetter(readString),\n 'Abstract': makeObjectPropertySetter(readString),\n 'KeywordList': makeObjectPropertySetter(readKeywordList),\n 'OnlineResource': makeObjectPropertySetter(readHref),\n 'ContactInformation': makeObjectPropertySetter(readContactInformation),\n 'Fees': makeObjectPropertySetter(readString),\n 'AccessConstraints': makeObjectPropertySetter(readString),\n 'LayerLimit': makeObjectPropertySetter(readNonNegativeInteger),\n 'MaxWidth': makeObjectPropertySetter(readNonNegativeInteger),\n 'MaxHeight': makeObjectPropertySetter(readNonNegativeInteger)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst CONTACT_INFORMATION_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'ContactPersonPrimary': makeObjectPropertySetter(readContactPersonPrimary),\n 'ContactPosition': makeObjectPropertySetter(readString),\n 'ContactAddress': makeObjectPropertySetter(readContactAddress),\n 'ContactVoiceTelephone': makeObjectPropertySetter(readString),\n 'ContactFacsimileTelephone': makeObjectPropertySetter(readString),\n 'ContactElectronicMailAddress': makeObjectPropertySetter(readString)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst CONTACT_PERSON_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'ContactPerson': makeObjectPropertySetter(readString),\n 'ContactOrganization': makeObjectPropertySetter(readString)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst CONTACT_ADDRESS_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'AddressType': makeObjectPropertySetter(readString),\n 'Address': makeObjectPropertySetter(readString),\n 'City': makeObjectPropertySetter(readString),\n 'StateOrProvince': makeObjectPropertySetter(readString),\n 'PostCode': makeObjectPropertySetter(readString),\n 'Country': makeObjectPropertySetter(readString)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst EXCEPTION_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Format': makeArrayPusher(readString)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst LAYER_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Name': makeObjectPropertySetter(readString),\n 'Title': makeObjectPropertySetter(readString),\n 'Abstract': makeObjectPropertySetter(readString),\n 'KeywordList': makeObjectPropertySetter(readKeywordList),\n 'CRS': makeObjectPropertyPusher(readString),\n 'EX_GeographicBoundingBox': makeObjectPropertySetter(readEXGeographicBoundingBox),\n 'BoundingBox': makeObjectPropertyPusher(readBoundingBox),\n 'Dimension': makeObjectPropertyPusher(readDimension),\n 'Attribution': makeObjectPropertySetter(readAttribution),\n 'AuthorityURL': makeObjectPropertyPusher(readAuthorityURL),\n 'Identifier': makeObjectPropertyPusher(readString),\n 'MetadataURL': makeObjectPropertyPusher(readMetadataURL),\n 'DataURL': makeObjectPropertyPusher(readFormatOnlineresource),\n 'FeatureListURL': makeObjectPropertyPusher(readFormatOnlineresource),\n 'Style': makeObjectPropertyPusher(readStyle),\n 'MinScaleDenominator': makeObjectPropertySetter(readDecimal),\n 'MaxScaleDenominator': makeObjectPropertySetter(readDecimal),\n 'Layer': makeObjectPropertyPusher(readLayer)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst ATTRIBUTION_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Title': makeObjectPropertySetter(readString),\n 'OnlineResource': makeObjectPropertySetter(readHref),\n 'LogoURL': makeObjectPropertySetter(readSizedFormatOnlineresource)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst EX_GEOGRAPHIC_BOUNDING_BOX_PARSERS =\n makeStructureNS(NAMESPACE_URIS, {\n 'westBoundLongitude': makeObjectPropertySetter(readDecimal),\n 'eastBoundLongitude': makeObjectPropertySetter(readDecimal),\n 'southBoundLatitude': makeObjectPropertySetter(readDecimal),\n 'northBoundLatitude': makeObjectPropertySetter(readDecimal)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst REQUEST_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'GetCapabilities': makeObjectPropertySetter(readOperationType),\n 'GetMap': makeObjectPropertySetter(readOperationType),\n 'GetFeatureInfo': makeObjectPropertySetter(readOperationType)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst OPERATIONTYPE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Format': makeObjectPropertyPusher(readString),\n 'DCPType': makeObjectPropertyPusher(readDCPType)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst DCPTYPE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'HTTP': makeObjectPropertySetter(readHTTP)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst HTTP_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Get': makeObjectPropertySetter(readFormatOnlineresource),\n 'Post': makeObjectPropertySetter(readFormatOnlineresource)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst STYLE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Name': makeObjectPropertySetter(readString),\n 'Title': makeObjectPropertySetter(readString),\n 'Abstract': makeObjectPropertySetter(readString),\n 'LegendURL': makeObjectPropertyPusher(readSizedFormatOnlineresource),\n 'StyleSheetURL': makeObjectPropertySetter(readFormatOnlineresource),\n 'StyleURL': makeObjectPropertySetter(readFormatOnlineresource)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst FORMAT_ONLINERESOURCE_PARSERS =\n makeStructureNS(NAMESPACE_URIS, {\n 'Format': makeObjectPropertySetter(readString),\n 'OnlineResource': makeObjectPropertySetter(readHref)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst KEYWORDLIST_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Keyword': makeArrayPusher(readString)\n });\n\n\n/**\n * Read a WMS capabilities document.\n *\n * @function\n * @param {Document|Node|string} source The XML source.\n * @return {Object} An object representing the WMS capabilities.\n * @api\n */\nWMSCapabilities.prototype.read;\n\n\n/**\n * @inheritDoc\n */\nWMSCapabilities.prototype.readFromDocument = function(doc) {\n for (let n = doc.firstChild; n; n = n.nextSibling) {\n if (n.nodeType == Node.ELEMENT_NODE) {\n return this.readFromNode(n);\n }\n }\n return null;\n};\n\n\n/**\n * @inheritDoc\n */\nWMSCapabilities.prototype.readFromNode = function(node) {\n this.version = node.getAttribute('version').trim();\n const wmsCapabilityObject = pushParseAndPop({\n 'version': this.version\n }, PARSERS, node, []);\n return wmsCapabilityObject ? wmsCapabilityObject : null;\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Attribution object.\n */\nfunction readAttribution(node, objectStack) {\n return pushParseAndPop({}, ATTRIBUTION_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object} Bounding box object.\n */\nfunction readBoundingBox(node, objectStack) {\n const extent = [\n readDecimalString(node.getAttribute('minx')),\n readDecimalString(node.getAttribute('miny')),\n readDecimalString(node.getAttribute('maxx')),\n readDecimalString(node.getAttribute('maxy'))\n ];\n\n const resolutions = [\n readDecimalString(node.getAttribute('resx')),\n readDecimalString(node.getAttribute('resy'))\n ];\n\n return {\n 'crs': node.getAttribute('CRS'),\n 'extent': extent,\n 'res': resolutions\n };\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {module:ol/extent~Extent|undefined} Bounding box object.\n */\nfunction readEXGeographicBoundingBox(node, objectStack) {\n const geographicBoundingBox = pushParseAndPop(\n {},\n EX_GEOGRAPHIC_BOUNDING_BOX_PARSERS,\n node, objectStack);\n if (!geographicBoundingBox) {\n return undefined;\n }\n const westBoundLongitude = /** @type {number|undefined} */\n (geographicBoundingBox['westBoundLongitude']);\n const southBoundLatitude = /** @type {number|undefined} */\n (geographicBoundingBox['southBoundLatitude']);\n const eastBoundLongitude = /** @type {number|undefined} */\n (geographicBoundingBox['eastBoundLongitude']);\n const northBoundLatitude = /** @type {number|undefined} */\n (geographicBoundingBox['northBoundLatitude']);\n if (westBoundLongitude === undefined || southBoundLatitude === undefined ||\n eastBoundLongitude === undefined || northBoundLatitude === undefined) {\n return undefined;\n }\n return [\n westBoundLongitude, southBoundLatitude,\n eastBoundLongitude, northBoundLatitude\n ];\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Capability object.\n */\nfunction readCapability(node, objectStack) {\n return pushParseAndPop({}, CAPABILITY_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Service object.\n */\nfunction readService(node, objectStack) {\n return pushParseAndPop({}, SERVICE_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Contact information object.\n */\nfunction readContactInformation(node, objectStack) {\n return pushParseAndPop({}, CONTACT_INFORMATION_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Contact person object.\n */\nfunction readContactPersonPrimary(node, objectStack) {\n return pushParseAndPop({}, CONTACT_PERSON_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Contact address object.\n */\nfunction readContactAddress(node, objectStack) {\n return pushParseAndPop({}, CONTACT_ADDRESS_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Array.<string>|undefined} Format array.\n */\nfunction readException(node, objectStack) {\n return pushParseAndPop([], EXCEPTION_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Layer object.\n */\nfunction readCapabilityLayer(node, objectStack) {\n return pushParseAndPop({}, LAYER_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Layer object.\n */\nfunction readLayer(node, objectStack) {\n const parentLayerObject = /** @type {!Object.<string,*>} */ (objectStack[objectStack.length - 1]);\n\n const layerObject = pushParseAndPop({}, LAYER_PARSERS, node, objectStack);\n\n if (!layerObject) {\n return undefined;\n }\n let queryable = readBooleanString(node.getAttribute('queryable'));\n if (queryable === undefined) {\n queryable = parentLayerObject['queryable'];\n }\n layerObject['queryable'] = queryable !== undefined ? queryable : false;\n\n let cascaded = readNonNegativeIntegerString(\n node.getAttribute('cascaded'));\n if (cascaded === undefined) {\n cascaded = parentLayerObject['cascaded'];\n }\n layerObject['cascaded'] = cascaded;\n\n let opaque = readBooleanString(node.getAttribute('opaque'));\n if (opaque === undefined) {\n opaque = parentLayerObject['opaque'];\n }\n layerObject['opaque'] = opaque !== undefined ? opaque : false;\n\n let noSubsets = readBooleanString(node.getAttribute('noSubsets'));\n if (noSubsets === undefined) {\n noSubsets = parentLayerObject['noSubsets'];\n }\n layerObject['noSubsets'] = noSubsets !== undefined ? noSubsets : false;\n\n let fixedWidth = readDecimalString(node.getAttribute('fixedWidth'));\n if (!fixedWidth) {\n fixedWidth = parentLayerObject['fixedWidth'];\n }\n layerObject['fixedWidth'] = fixedWidth;\n\n let fixedHeight = readDecimalString(node.getAttribute('fixedHeight'));\n if (!fixedHeight) {\n fixedHeight = parentLayerObject['fixedHeight'];\n }\n layerObject['fixedHeight'] = fixedHeight;\n\n // See 7.2.4.8\n const addKeys = ['Style', 'CRS', 'AuthorityURL'];\n addKeys.forEach(function(key) {\n if (key in parentLayerObject) {\n const childValue = layerObject[key] || [];\n layerObject[key] = childValue.concat(parentLayerObject[key]);\n }\n });\n\n const replaceKeys = ['EX_GeographicBoundingBox', 'BoundingBox', 'Dimension',\n 'Attribution', 'MinScaleDenominator', 'MaxScaleDenominator'];\n replaceKeys.forEach(function(key) {\n if (!(key in layerObject)) {\n const parentValue = parentLayerObject[key];\n layerObject[key] = parentValue;\n }\n });\n\n return layerObject;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object} Dimension object.\n */\nfunction readDimension(node, objectStack) {\n const dimensionObject = {\n 'name': node.getAttribute('name'),\n 'units': node.getAttribute('units'),\n 'unitSymbol': node.getAttribute('unitSymbol'),\n 'default': node.getAttribute('default'),\n 'multipleValues': readBooleanString(node.getAttribute('multipleValues')),\n 'nearestValue': readBooleanString(node.getAttribute('nearestValue')),\n 'current': readBooleanString(node.getAttribute('current')),\n 'values': readString(node)\n };\n return dimensionObject;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Online resource object.\n */\nfunction readFormatOnlineresource(node, objectStack) {\n return pushParseAndPop({}, FORMAT_ONLINERESOURCE_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Request object.\n */\nfunction readRequest(node, objectStack) {\n return pushParseAndPop({}, REQUEST_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} DCP type object.\n */\nfunction readDCPType(node, objectStack) {\n return pushParseAndPop({}, DCPTYPE_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} HTTP object.\n */\nfunction readHTTP(node, objectStack) {\n return pushParseAndPop({}, HTTP_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Operation type object.\n */\nfunction readOperationType(node, objectStack) {\n return pushParseAndPop({}, OPERATIONTYPE_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Online resource object.\n */\nfunction readSizedFormatOnlineresource(node, objectStack) {\n const formatOnlineresource = readFormatOnlineresource(node, objectStack);\n if (formatOnlineresource) {\n const size = [\n readNonNegativeIntegerString(node.getAttribute('width')),\n readNonNegativeIntegerString(node.getAttribute('height'))\n ];\n formatOnlineresource['size'] = size;\n return formatOnlineresource;\n }\n return undefined;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Authority URL object.\n */\nfunction readAuthorityURL(node, objectStack) {\n const authorityObject = readFormatOnlineresource(node, objectStack);\n if (authorityObject) {\n authorityObject['name'] = node.getAttribute('name');\n return authorityObject;\n }\n return undefined;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Metadata URL object.\n */\nfunction readMetadataURL(node, objectStack) {\n const metadataObject = readFormatOnlineresource(node, objectStack);\n if (metadataObject) {\n metadataObject['type'] = node.getAttribute('type');\n return metadataObject;\n }\n return undefined;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Style object.\n */\nfunction readStyle(node, objectStack) {\n return pushParseAndPop({}, STYLE_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Array.<string>|undefined} Keyword list.\n */\nfunction readKeywordList(node, objectStack) {\n return pushParseAndPop([], KEYWORDLIST_PARSERS, node, objectStack);\n}\n\n\nexport default WMSCapabilities;\n","/**\n * @module ol/format/WMSGetFeatureInfo\n */\nimport {inherits} from '../util.js';\nimport {extend, includes} from '../array.js';\nimport GML2 from '../format/GML2.js';\nimport XMLFeature from '../format/XMLFeature.js';\nimport {assign} from '../obj.js';\nimport {makeArrayPusher, makeStructureNS, pushParseAndPop} from '../xml.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {Array.<string>} [layers] If set, only features of the given layers will be returned by the format when read.\n */\n\n\n/**\n * @classdesc\n * Format for reading WMSGetFeatureInfo format. It uses\n * {@link module:ol/format/GML2~GML2} to read features.\n *\n * @constructor\n * @extends {module:ol/format/XMLFeature}\n * @param {module:ol/format/WMSGetFeatureInfo~Options=} opt_options Options.\n * @api\n */\nconst WMSGetFeatureInfo = function(opt_options) {\n\n const options = opt_options ? opt_options : {};\n\n /**\n * @private\n * @type {string}\n */\n this.featureNS_ = 'http://mapserver.gis.umn.edu/mapserver';\n\n\n /**\n * @private\n * @type {module:ol/format/GML2}\n */\n this.gmlFormat_ = new GML2();\n\n\n /**\n * @private\n * @type {Array.<string>}\n */\n this.layers_ = options.layers ? options.layers : null;\n\n XMLFeature.call(this);\n};\n\ninherits(WMSGetFeatureInfo, XMLFeature);\n\n\n/**\n * @const\n * @type {string}\n */\nconst featureIdentifier = '_feature';\n\n\n/**\n * @const\n * @type {string}\n */\nconst layerIdentifier = '_layer';\n\n\n/**\n * @return {Array.<string>} layers\n */\nWMSGetFeatureInfo.prototype.getLayers = function() {\n return this.layers_;\n};\n\n\n/**\n * @param {Array.<string>} layers Layers to parse.\n */\nWMSGetFeatureInfo.prototype.setLayers = function(layers) {\n this.layers_ = layers;\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Array.<module:ol/Feature>} Features.\n * @private\n */\nWMSGetFeatureInfo.prototype.readFeatures_ = function(node, objectStack) {\n node.setAttribute('namespaceURI', this.featureNS_);\n const localName = node.localName;\n /** @type {Array.<module:ol/Feature>} */\n let features = [];\n if (node.childNodes.length === 0) {\n return features;\n }\n if (localName == 'msGMLOutput') {\n for (let i = 0, ii = node.childNodes.length; i < ii; i++) {\n const layer = node.childNodes[i];\n if (layer.nodeType !== Node.ELEMENT_NODE) {\n continue;\n }\n const context = objectStack[0];\n\n const toRemove = layerIdentifier;\n const layerName = layer.localName.replace(toRemove, '');\n\n if (this.layers_ && !includes(this.layers_, layerName)) {\n continue;\n }\n\n const featureType = layerName +\n featureIdentifier;\n\n context['featureType'] = featureType;\n context['featureNS'] = this.featureNS_;\n\n const parsers = {};\n parsers[featureType] = makeArrayPusher(\n this.gmlFormat_.readFeatureElement, this.gmlFormat_);\n const parsersNS = makeStructureNS(\n [context['featureNS'], null], parsers);\n layer.setAttribute('namespaceURI', this.featureNS_);\n const layerFeatures = pushParseAndPop(\n [], parsersNS, layer, objectStack, this.gmlFormat_);\n if (layerFeatures) {\n extend(features, layerFeatures);\n }\n }\n }\n if (localName == 'FeatureCollection') {\n const gmlFeatures = pushParseAndPop([],\n this.gmlFormat_.FEATURE_COLLECTION_PARSERS, node,\n [{}], this.gmlFormat_);\n if (gmlFeatures) {\n features = gmlFeatures;\n }\n }\n return features;\n};\n\n\n/**\n * Read all features from a WMSGetFeatureInfo response.\n *\n * @function\n * @param {Document|Node|Object|string} source Source.\n * @param {module:ol/format/Feature~ReadOptions=} opt_options Options.\n * @return {Array.<module:ol/Feature>} Features.\n * @api\n */\nWMSGetFeatureInfo.prototype.readFeatures;\n\n\n/**\n * @inheritDoc\n */\nWMSGetFeatureInfo.prototype.readFeaturesFromNode = function(node, opt_options) {\n const options = {};\n if (opt_options) {\n assign(options, this.getReadOptions(node, opt_options));\n }\n return this.readFeatures_(node, [options]);\n};\n\n\n/**\n * Not implemented.\n * @inheritDoc\n */\nWMSGetFeatureInfo.prototype.writeFeatureNode = function(feature, opt_options) {};\n\n\n/**\n * Not implemented.\n * @inheritDoc\n */\nWMSGetFeatureInfo.prototype.writeFeaturesNode = function(features, opt_options) {};\n\n\n/**\n * Not implemented.\n * @inheritDoc\n */\nWMSGetFeatureInfo.prototype.writeGeometryNode = function(geometry, opt_options) {};\nexport default WMSGetFeatureInfo;\n","/**\n * @module ol/format/OWS\n */\nimport {inherits} from '../util.js';\nimport {readHref} from '../format/XLink.js';\nimport XML from '../format/XML.js';\nimport {readString} from '../format/xsd.js';\nimport {makeObjectPropertyPusher, makeObjectPropertySetter, makeStructureNS, pushParseAndPop} from '../xml.js';\n\n/**\n * @constructor\n * @extends {module:ol/format/XML}\n */\nconst OWS = function() {\n XML.call(this);\n};\n\ninherits(OWS, XML);\n\n\n/**\n * @const\n * @type {Array.<null|string>}\n */\nconst NAMESPACE_URIS = [null, 'http://www.opengis.net/ows/1.1'];\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'ServiceIdentification': makeObjectPropertySetter(readServiceIdentification),\n 'ServiceProvider': makeObjectPropertySetter(readServiceProvider),\n 'OperationsMetadata': makeObjectPropertySetter(readOperationsMetadata)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst ADDRESS_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'DeliveryPoint': makeObjectPropertySetter(readString),\n 'City': makeObjectPropertySetter(readString),\n 'AdministrativeArea': makeObjectPropertySetter(readString),\n 'PostalCode': makeObjectPropertySetter(readString),\n 'Country': makeObjectPropertySetter(readString),\n 'ElectronicMailAddress': makeObjectPropertySetter(readString)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst ALLOWED_VALUES_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Value': makeObjectPropertyPusher(readValue)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst CONSTRAINT_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'AllowedValues': makeObjectPropertySetter(readAllowedValues)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst CONTACT_INFO_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Phone': makeObjectPropertySetter(readPhone),\n 'Address': makeObjectPropertySetter(readAddress)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst DCP_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'HTTP': makeObjectPropertySetter(readHttp)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst HTTP_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Get': makeObjectPropertyPusher(readGet),\n 'Post': undefined // TODO\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst OPERATION_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'DCP': makeObjectPropertySetter(readDcp)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst OPERATIONS_METADATA_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Operation': readOperation\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst PHONE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Voice': makeObjectPropertySetter(readString),\n 'Facsimile': makeObjectPropertySetter(readString)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst REQUEST_METHOD_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Constraint': makeObjectPropertyPusher(readConstraint)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst SERVICE_CONTACT_PARSERS =\n makeStructureNS(\n NAMESPACE_URIS, {\n 'IndividualName': makeObjectPropertySetter(readString),\n 'PositionName': makeObjectPropertySetter(readString),\n 'ContactInfo': makeObjectPropertySetter(readContactInfo)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst SERVICE_IDENTIFICATION_PARSERS =\n makeStructureNS(\n NAMESPACE_URIS, {\n 'Abstract': makeObjectPropertySetter(readString),\n 'AccessConstraints': makeObjectPropertySetter(readString),\n 'Fees': makeObjectPropertySetter(readString),\n 'Title': makeObjectPropertySetter(readString),\n 'ServiceTypeVersion': makeObjectPropertySetter(readString),\n 'ServiceType': makeObjectPropertySetter(readString)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst SERVICE_PROVIDER_PARSERS =\n makeStructureNS(\n NAMESPACE_URIS, {\n 'ProviderName': makeObjectPropertySetter(readString),\n 'ProviderSite': makeObjectPropertySetter(readHref),\n 'ServiceContact': makeObjectPropertySetter(readServiceContact)\n });\n\n\n/**\n * @inheritDoc\n */\nOWS.prototype.readFromDocument = function(doc) {\n for (let n = doc.firstChild; n; n = n.nextSibling) {\n if (n.nodeType == Node.ELEMENT_NODE) {\n return this.readFromNode(n);\n }\n }\n return null;\n};\n\n\n/**\n * @inheritDoc\n */\nOWS.prototype.readFromNode = function(node) {\n const owsObject = pushParseAndPop({},\n PARSERS, node, []);\n return owsObject ? owsObject : null;\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} The address.\n */\nfunction readAddress(node, objectStack) {\n return pushParseAndPop({},\n ADDRESS_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} The values.\n */\nfunction readAllowedValues(node, objectStack) {\n return pushParseAndPop({},\n ALLOWED_VALUES_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} The constraint.\n */\nfunction readConstraint(node, objectStack) {\n const name = node.getAttribute('name');\n if (!name) {\n return undefined;\n }\n return pushParseAndPop({'name': name},\n CONSTRAINT_PARSERS, node,\n objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} The contact info.\n */\nfunction readContactInfo(node, objectStack) {\n return pushParseAndPop({},\n CONTACT_INFO_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} The DCP.\n */\nfunction readDcp(node, objectStack) {\n return pushParseAndPop({},\n DCP_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} The GET object.\n */\nfunction readGet(node, objectStack) {\n const href = readHref(node);\n if (!href) {\n return undefined;\n }\n return pushParseAndPop({'href': href},\n REQUEST_METHOD_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} The HTTP object.\n */\nfunction readHttp(node, objectStack) {\n return pushParseAndPop({}, HTTP_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} The operation.\n */\nfunction readOperation(node, objectStack) {\n const name = node.getAttribute('name');\n const value = pushParseAndPop({},\n OPERATION_PARSERS, node, objectStack);\n if (!value) {\n return undefined;\n }\n const object = /** @type {Object} */\n (objectStack[objectStack.length - 1]);\n object[name] = value;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} The operations metadata.\n */\nfunction readOperationsMetadata(node, objectStack) {\n return pushParseAndPop({},\n OPERATIONS_METADATA_PARSERS, node,\n objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} The phone.\n */\nfunction readPhone(node, objectStack) {\n return pushParseAndPop({},\n PHONE_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} The service identification.\n */\nfunction readServiceIdentification(node, objectStack) {\n return pushParseAndPop(\n {}, SERVICE_IDENTIFICATION_PARSERS, node,\n objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} The service contact.\n */\nfunction readServiceContact(node, objectStack) {\n return pushParseAndPop(\n {}, SERVICE_CONTACT_PARSERS, node,\n objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} The service provider.\n */\nfunction readServiceProvider(node, objectStack) {\n return pushParseAndPop(\n {}, SERVICE_PROVIDER_PARSERS, node,\n objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {string|undefined} The value.\n */\nfunction readValue(node, objectStack) {\n return readString(node);\n}\n\n\nexport default OWS;\n","/**\n * @module ol/format/WMTSCapabilities\n */\nimport {inherits} from '../util.js';\nimport {boundingExtent} from '../extent.js';\nimport OWS from '../format/OWS.js';\nimport {readHref} from '../format/XLink.js';\nimport XML from '../format/XML.js';\nimport {readString, readNonNegativeInteger, readDecimal} from '../format/xsd.js';\nimport {pushParseAndPop, makeStructureNS,\n makeObjectPropertySetter, makeObjectPropertyPusher, makeArrayPusher} from '../xml.js';\n\n/**\n * @classdesc\n * Format for reading WMTS capabilities data.\n *\n * @constructor\n * @extends {module:ol/format/XML}\n * @api\n */\nconst WMTSCapabilities = function() {\n XML.call(this);\n\n /**\n * @type {module:ol/format/OWS}\n * @private\n */\n this.owsParser_ = new OWS();\n};\n\ninherits(WMTSCapabilities, XML);\n\n\n/**\n * @const\n * @type {Array.<null|string>}\n */\nconst NAMESPACE_URIS = [\n null,\n 'http://www.opengis.net/wmts/1.0'\n];\n\n\n/**\n * @const\n * @type {Array.<null|string>}\n */\nconst OWS_NAMESPACE_URIS = [\n null,\n 'http://www.opengis.net/ows/1.1'\n];\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Contents': makeObjectPropertySetter(readContents)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst CONTENTS_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Layer': makeObjectPropertyPusher(readLayer),\n 'TileMatrixSet': makeObjectPropertyPusher(readTileMatrixSet)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst LAYER_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Style': makeObjectPropertyPusher(readStyle),\n 'Format': makeObjectPropertyPusher(readString),\n 'TileMatrixSetLink': makeObjectPropertyPusher(readTileMatrixSetLink),\n 'Dimension': makeObjectPropertyPusher(readDimensions),\n 'ResourceURL': makeObjectPropertyPusher(readResourceUrl)\n }, makeStructureNS(OWS_NAMESPACE_URIS, {\n 'Title': makeObjectPropertySetter(readString),\n 'Abstract': makeObjectPropertySetter(readString),\n 'WGS84BoundingBox': makeObjectPropertySetter(readWgs84BoundingBox),\n 'Identifier': makeObjectPropertySetter(readString)\n }));\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst STYLE_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'LegendURL': makeObjectPropertyPusher(readLegendUrl)\n }, makeStructureNS(OWS_NAMESPACE_URIS, {\n 'Title': makeObjectPropertySetter(readString),\n 'Identifier': makeObjectPropertySetter(readString)\n }));\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst TMS_LINKS_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'TileMatrixSet': makeObjectPropertySetter(readString),\n 'TileMatrixSetLimits': makeObjectPropertySetter(readTileMatrixLimitsList)\n });\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst TMS_LIMITS_LIST_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'TileMatrixLimits': makeArrayPusher(readTileMatrixLimits)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst TMS_LIMITS_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'TileMatrix': makeObjectPropertySetter(readString),\n 'MinTileRow': makeObjectPropertySetter(readNonNegativeInteger),\n 'MaxTileRow': makeObjectPropertySetter(readNonNegativeInteger),\n 'MinTileCol': makeObjectPropertySetter(readNonNegativeInteger),\n 'MaxTileCol': makeObjectPropertySetter(readNonNegativeInteger)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst DIMENSION_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'Default': makeObjectPropertySetter(readString),\n 'Value': makeObjectPropertyPusher(readString)\n }, makeStructureNS(OWS_NAMESPACE_URIS, {\n 'Identifier': makeObjectPropertySetter(readString)\n }));\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst WGS84_BBOX_READERS = makeStructureNS(\n OWS_NAMESPACE_URIS, {\n 'LowerCorner': makeArrayPusher(readCoordinates),\n 'UpperCorner': makeArrayPusher(readCoordinates)\n });\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst TMS_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'WellKnownScaleSet': makeObjectPropertySetter(readString),\n 'TileMatrix': makeObjectPropertyPusher(readTileMatrix)\n }, makeStructureNS(OWS_NAMESPACE_URIS, {\n 'SupportedCRS': makeObjectPropertySetter(readString),\n 'Identifier': makeObjectPropertySetter(readString)\n }));\n\n\n/**\n * @const\n * @type {Object.<string, Object.<string, module:ol/xml~Parser>>}\n */\nconst TM_PARSERS = makeStructureNS(\n NAMESPACE_URIS, {\n 'TopLeftCorner': makeObjectPropertySetter(readCoordinates),\n 'ScaleDenominator': makeObjectPropertySetter(readDecimal),\n 'TileWidth': makeObjectPropertySetter(readNonNegativeInteger),\n 'TileHeight': makeObjectPropertySetter(readNonNegativeInteger),\n 'MatrixWidth': makeObjectPropertySetter(readNonNegativeInteger),\n 'MatrixHeight': makeObjectPropertySetter(readNonNegativeInteger)\n }, makeStructureNS(OWS_NAMESPACE_URIS, {\n 'Identifier': makeObjectPropertySetter(readString)\n }));\n\n\n/**\n * Read a WMTS capabilities document.\n *\n * @function\n * @param {Document|Node|string} source The XML source.\n * @return {Object} An object representing the WMTS capabilities.\n * @api\n */\nWMTSCapabilities.prototype.read;\n\n\n/**\n * @inheritDoc\n */\nWMTSCapabilities.prototype.readFromDocument = function(doc) {\n for (let n = doc.firstChild; n; n = n.nextSibling) {\n if (n.nodeType == Node.ELEMENT_NODE) {\n return this.readFromNode(n);\n }\n }\n return null;\n};\n\n\n/**\n * @inheritDoc\n */\nWMTSCapabilities.prototype.readFromNode = function(node) {\n const version = node.getAttribute('version').trim();\n let WMTSCapabilityObject = this.owsParser_.readFromNode(node);\n if (!WMTSCapabilityObject) {\n return null;\n }\n WMTSCapabilityObject['version'] = version;\n WMTSCapabilityObject = pushParseAndPop(WMTSCapabilityObject, PARSERS, node, []);\n return WMTSCapabilityObject ? WMTSCapabilityObject : null;\n};\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Attribution object.\n */\nfunction readContents(node, objectStack) {\n return pushParseAndPop({}, CONTENTS_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Layers object.\n */\nfunction readLayer(node, objectStack) {\n return pushParseAndPop({}, LAYER_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Tile Matrix Set object.\n */\nfunction readTileMatrixSet(node, objectStack) {\n return pushParseAndPop({}, TMS_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Style object.\n */\nfunction readStyle(node, objectStack) {\n const style = pushParseAndPop({}, STYLE_PARSERS, node, objectStack);\n if (!style) {\n return undefined;\n }\n const isDefault = node.getAttribute('isDefault') === 'true';\n style['isDefault'] = isDefault;\n return style;\n\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Tile Matrix Set Link object.\n */\nfunction readTileMatrixSetLink(node, objectStack) {\n return pushParseAndPop({}, TMS_LINKS_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Dimension object.\n */\nfunction readDimensions(node, objectStack) {\n return pushParseAndPop({}, DIMENSION_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Resource URL object.\n */\nfunction readResourceUrl(node, objectStack) {\n const format = node.getAttribute('format');\n const template = node.getAttribute('template');\n const resourceType = node.getAttribute('resourceType');\n const resource = {};\n if (format) {\n resource['format'] = format;\n }\n if (template) {\n resource['template'] = template;\n }\n if (resourceType) {\n resource['resourceType'] = resourceType;\n }\n return resource;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} WGS84 BBox object.\n */\nfunction readWgs84BoundingBox(node, objectStack) {\n const coordinates = pushParseAndPop([], WGS84_BBOX_READERS, node, objectStack);\n if (coordinates.length != 2) {\n return undefined;\n }\n return boundingExtent(coordinates);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Legend object.\n */\nfunction readLegendUrl(node, objectStack) {\n const legend = {};\n legend['format'] = node.getAttribute('format');\n legend['href'] = readHref(node);\n return legend;\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} Coordinates object.\n */\nfunction readCoordinates(node, objectStack) {\n const coordinates = readString(node).split(' ');\n if (!coordinates || coordinates.length != 2) {\n return undefined;\n }\n const x = +coordinates[0];\n const y = +coordinates[1];\n if (isNaN(x) || isNaN(y)) {\n return undefined;\n }\n return [x, y];\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} TileMatrix object.\n */\nfunction readTileMatrix(node, objectStack) {\n return pushParseAndPop({}, TM_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} TileMatrixSetLimits Object.\n */\nfunction readTileMatrixLimitsList(node, objectStack) {\n return pushParseAndPop([], TMS_LIMITS_LIST_PARSERS, node, objectStack);\n}\n\n\n/**\n * @param {Node} node Node.\n * @param {Array.<*>} objectStack Object stack.\n * @return {Object|undefined} TileMatrixLimits Array.\n */\nfunction readTileMatrixLimits(node, objectStack) {\n return pushParseAndPop({}, TMS_LIMITS_PARSERS, node, objectStack);\n}\n\n\nexport default WMTSCapabilities;\n","/**\n * @module ol/layer/Heatmap\n */\nimport {listen} from '../events.js';\nimport {inherits} from '../util.js';\nimport {getChangeEventType} from '../Object.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport VectorLayer from '../layer/Vector.js';\nimport {clamp} from '../math.js';\nimport {assign} from '../obj.js';\nimport RenderEventType from '../render/EventType.js';\nimport Icon from '../style/Icon.js';\nimport Style from '../style/Style.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {module:ol/extent~Extent} [extent] The bounding extent for layer rendering. The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex=0] The z-index for layer rendering. At rendering time, the layers\n * will be ordered, first by Z-index and then by position.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {Array.<string>} [gradient=['#00f', '#0ff', '#0f0', '#ff0', '#f00']] The color gradient\n * of the heatmap, specified as an array of CSS color strings.\n * @property {number} [radius=8] Radius size in pixels.\n * @property {number} [blur=15] Blur size in pixels.\n * @property {number} [shadow=250] Shadow size in pixels.\n * @property {string|function(module:ol/Feature):number} [weight='weight'] The feature\n * attribute to use for the weight or a function that returns a weight from a feature. Weight values\n * should range from 0 to 1 (and values outside will be clamped to that range).\n * @property {module:ol/source/Vector} [source] Source.\n */\n\n\n/**\n * @enum {string}\n * @private\n */\nconst Property = {\n BLUR: 'blur',\n GRADIENT: 'gradient',\n RADIUS: 'radius'\n};\n\n\n/**\n * @const\n * @type {Array.<string>}\n */\nconst DEFAULT_GRADIENT = ['#00f', '#0ff', '#0f0', '#ff0', '#f00'];\n\n\n/**\n * @classdesc\n * Layer for rendering vector data as a heatmap.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @constructor\n * @extends {module:ol/layer/Vector}\n * @fires module:ol/render/Event~RenderEvent\n * @param {module:ol/layer/Heatmap~Options=} opt_options Options.\n * @api\n */\nconst Heatmap = function(opt_options) {\n const options = opt_options ? opt_options : {};\n\n const baseOptions = assign({}, options);\n\n delete baseOptions.gradient;\n delete baseOptions.radius;\n delete baseOptions.blur;\n delete baseOptions.shadow;\n delete baseOptions.weight;\n VectorLayer.call(this, /** @type {module:ol/layer/Vector~Options} */ (baseOptions));\n\n /**\n * @private\n * @type {Uint8ClampedArray}\n */\n this.gradient_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.shadow_ = options.shadow !== undefined ? options.shadow : 250;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.circleImage_ = undefined;\n\n /**\n * @private\n * @type {Array.<Array.<module:ol/style/Style>>}\n */\n this.styleCache_ = null;\n\n listen(this,\n getChangeEventType(Property.GRADIENT),\n this.handleGradientChanged_, this);\n\n this.setGradient(options.gradient ? options.gradient : DEFAULT_GRADIENT);\n\n this.setBlur(options.blur !== undefined ? options.blur : 15);\n\n this.setRadius(options.radius !== undefined ? options.radius : 8);\n\n listen(this,\n getChangeEventType(Property.BLUR),\n this.handleStyleChanged_, this);\n listen(this,\n getChangeEventType(Property.RADIUS),\n this.handleStyleChanged_, this);\n\n this.handleStyleChanged_();\n\n const weight = options.weight ? options.weight : 'weight';\n let weightFunction;\n if (typeof weight === 'string') {\n weightFunction = function(feature) {\n return feature.get(weight);\n };\n } else {\n weightFunction = weight;\n }\n\n this.setStyle(function(feature, resolution) {\n const weight = weightFunction(feature);\n const opacity = weight !== undefined ? clamp(weight, 0, 1) : 1;\n // cast to 8 bits\n const index = (255 * opacity) | 0;\n let style = this.styleCache_[index];\n if (!style) {\n style = [\n new Style({\n image: new Icon({\n opacity: opacity,\n src: this.circleImage_\n })\n })\n ];\n this.styleCache_[index] = style;\n }\n return style;\n }.bind(this));\n\n // For performance reasons, don't sort the features before rendering.\n // The render order is not relevant for a heatmap representation.\n this.setRenderOrder(null);\n\n listen(this, RenderEventType.RENDER, this.handleRender_, this);\n};\n\ninherits(Heatmap, VectorLayer);\n\n\n/**\n * @param {Array.<string>} colors A list of colored.\n * @return {Uint8ClampedArray} An array.\n * @private\n */\nconst createGradient = function(colors) {\n const width = 1;\n const height = 256;\n const context = createCanvasContext2D(width, height);\n\n const gradient = context.createLinearGradient(0, 0, width, height);\n const step = 1 / (colors.length - 1);\n for (let i = 0, ii = colors.length; i < ii; ++i) {\n gradient.addColorStop(i * step, colors[i]);\n }\n\n context.fillStyle = gradient;\n context.fillRect(0, 0, width, height);\n\n return context.getImageData(0, 0, width, height).data;\n};\n\n\n/**\n * @return {string} Data URL for a circle.\n * @private\n */\nHeatmap.prototype.createCircle_ = function() {\n const radius = this.getRadius();\n const blur = this.getBlur();\n const halfSize = radius + blur + 1;\n const size = 2 * halfSize;\n const context = createCanvasContext2D(size, size);\n context.shadowOffsetX = context.shadowOffsetY = this.shadow_;\n context.shadowBlur = blur;\n context.shadowColor = '#000';\n context.beginPath();\n const center = halfSize - this.shadow_;\n context.arc(center, center, radius, 0, Math.PI * 2, true);\n context.fill();\n return context.canvas.toDataURL();\n};\n\n\n/**\n * Return the blur size in pixels.\n * @return {number} Blur size in pixels.\n * @api\n * @observable\n */\nHeatmap.prototype.getBlur = function() {\n return /** @type {number} */ (this.get(Property.BLUR));\n};\n\n\n/**\n * Return the gradient colors as array of strings.\n * @return {Array.<string>} Colors.\n * @api\n * @observable\n */\nHeatmap.prototype.getGradient = function() {\n return /** @type {Array.<string>} */ (this.get(Property.GRADIENT));\n};\n\n\n/**\n * Return the size of the radius in pixels.\n * @return {number} Radius size in pixel.\n * @api\n * @observable\n */\nHeatmap.prototype.getRadius = function() {\n return /** @type {number} */ (this.get(Property.RADIUS));\n};\n\n\n/**\n * @private\n */\nHeatmap.prototype.handleGradientChanged_ = function() {\n this.gradient_ = createGradient(this.getGradient());\n};\n\n\n/**\n * @private\n */\nHeatmap.prototype.handleStyleChanged_ = function() {\n this.circleImage_ = this.createCircle_();\n this.styleCache_ = new Array(256);\n this.changed();\n};\n\n\n/**\n * @param {module:ol/render/Event} event Post compose event\n * @private\n */\nHeatmap.prototype.handleRender_ = function(event) {\n const context = event.context;\n const canvas = context.canvas;\n const image = context.getImageData(0, 0, canvas.width, canvas.height);\n const view8 = image.data;\n for (let i = 0, ii = view8.length; i < ii; i += 4) {\n const alpha = view8[i + 3] * 4;\n if (alpha) {\n view8[i] = this.gradient_[alpha];\n view8[i + 1] = this.gradient_[alpha + 1];\n view8[i + 2] = this.gradient_[alpha + 2];\n }\n }\n context.putImageData(image, 0, 0);\n};\n\n\n/**\n * Set the blur size in pixels.\n * @param {number} blur Blur size in pixels.\n * @api\n * @observable\n */\nHeatmap.prototype.setBlur = function(blur) {\n this.set(Property.BLUR, blur);\n};\n\n\n/**\n * Set the gradient colors as array of strings.\n * @param {Array.<string>} colors Gradient.\n * @api\n * @observable\n */\nHeatmap.prototype.setGradient = function(colors) {\n this.set(Property.GRADIENT, colors);\n};\n\n\n/**\n * Set the size of the radius in pixels.\n * @param {number} radius Radius size in pixel.\n * @api\n * @observable\n */\nHeatmap.prototype.setRadius = function(radius) {\n this.set(Property.RADIUS, radius);\n};\n\nexport default Heatmap;\n","/**\n * @module ol/layer/Image\n */\nimport {inherits} from '../util.js';\nimport LayerType from '../LayerType.js';\nimport Layer from '../layer/Layer.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {module:ol/extent~Extent} [extent] The bounding extent for layer rendering. The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex=0] The z-index for layer rendering. At rendering time, the layers\n * will be ordered, first by Z-index and then by position.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {module:ol/PluggableMap} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use {@link module:ol/Map#addLayer}.\n * @property {module:ol/source/Image} [source] Source for this layer.\n */\n\n\n/**\n * @classdesc\n * Server-rendered images that are available for arbitrary extents and\n * resolutions.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @constructor\n * @extends {module:ol/layer/Layer}\n * @fires module:ol/render/Event~RenderEvent\n * @param {module:ol/layer/Image~Options=} opt_options Layer options.\n * @api\n */\nconst ImageLayer = function(opt_options) {\n const options = opt_options ? opt_options : {};\n Layer.call(this, /** @type {module:ol/layer/Layer~Options} */ (options));\n\n /**\n * The layer type.\n * @protected\n * @type {module:ol/LayerType}\n */\n this.type = LayerType.IMAGE;\n\n};\n\ninherits(ImageLayer, Layer);\n\n\n/**\n * Return the associated {@link module:ol/source/Image source} of the image layer.\n * @function\n * @return {module:ol/source/Image} Source.\n * @api\n */\nImageLayer.prototype.getSource;\nexport default ImageLayer;\n","/**\n * @module ol/layer/TileProperty\n */\n\n/**\n * @enum {string}\n */\nexport default {\n PRELOAD: 'preload',\n USE_INTERIM_TILES_ON_ERROR: 'useInterimTilesOnError'\n};\n","/**\n * @module ol/layer/Tile\n */\nimport {inherits} from '../util.js';\nimport LayerType from '../LayerType.js';\nimport Layer from '../layer/Layer.js';\nimport TileProperty from '../layer/TileProperty.js';\nimport {assign} from '../obj.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {module:ol/extent~Extent} [extent] The bounding extent for layer rendering. The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex=0] The z-index for layer rendering. At rendering time, the layers\n * will be ordered, first by Z-index and then by position.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {number} [preload=0] Preload. Load low-resolution tiles up to `preload` levels. `0`\n * means no preloading.\n * @property {module:ol/source/Tile} [source] Source for this layer.\n * @property {module:ol/PluggableMap} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use {@link module:ol/Map#addLayer}.\n * @property {boolean} [useInterimTilesOnError=true] Use interim tiles on error.\n */\n\n\n/**\n * @classdesc\n * For layer sources that provide pre-rendered, tiled images in grids that are\n * organized by zoom levels for specific resolutions.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @constructor\n * @extends {module:ol/layer/Layer}\n * @fires module:ol/render/Event~RenderEvent\n * @param {module:ol/layer/Tile~Options=} opt_options Tile layer options.\n * @api\n */\nconst TileLayer = function(opt_options) {\n const options = opt_options ? opt_options : {};\n\n const baseOptions = assign({}, options);\n\n delete baseOptions.preload;\n delete baseOptions.useInterimTilesOnError;\n Layer.call(this, /** @type {module:ol/layer/Layer~Options} */ (baseOptions));\n\n this.setPreload(options.preload !== undefined ? options.preload : 0);\n this.setUseInterimTilesOnError(options.useInterimTilesOnError !== undefined ?\n options.useInterimTilesOnError : true);\n\n /**\n * The layer type.\n * @protected\n * @type {module:ol/LayerType}\n */\n this.type = LayerType.TILE;\n\n};\n\ninherits(TileLayer, Layer);\n\n\n/**\n * Return the level as number to which we will preload tiles up to.\n * @return {number} The level to preload tiles up to.\n * @observable\n * @api\n */\nTileLayer.prototype.getPreload = function() {\n return /** @type {number} */ (this.get(TileProperty.PRELOAD));\n};\n\n\n/**\n * Return the associated {@link module:ol/source/Tile tilesource} of the layer.\n * @function\n * @return {module:ol/source/Tile} Source.\n * @api\n */\nTileLayer.prototype.getSource;\n\n\n/**\n * Set the level as number to which we will preload tiles up to.\n * @param {number} preload The level to preload tiles up to.\n * @observable\n * @api\n */\nTileLayer.prototype.setPreload = function(preload) {\n this.set(TileProperty.PRELOAD, preload);\n};\n\n\n/**\n * Whether we use interim tiles on error.\n * @return {boolean} Use interim tiles on error.\n * @observable\n * @api\n */\nTileLayer.prototype.getUseInterimTilesOnError = function() {\n return /** @type {boolean} */ (this.get(TileProperty.USE_INTERIM_TILES_ON_ERROR));\n};\n\n\n/**\n * Set whether we use interim tiles on error.\n * @param {boolean} useInterimTilesOnError Use interim tiles on error.\n * @observable\n * @api\n */\nTileLayer.prototype.setUseInterimTilesOnError = function(useInterimTilesOnError) {\n this.set(TileProperty.USE_INTERIM_TILES_ON_ERROR, useInterimTilesOnError);\n};\nexport default TileLayer;\n","/**\n * @module ol/layer/VectorTile\n */\nimport {inherits} from '../util.js';\nimport LayerType from '../LayerType.js';\nimport {assert} from '../asserts.js';\nimport TileProperty from '../layer/TileProperty.js';\nimport VectorLayer from '../layer/Vector.js';\nimport VectorTileRenderType from '../layer/VectorTileRenderType.js';\nimport {assign} from '../obj.js';\n\n\n/**\n * @enum {string}\n * Render mode for vector tiles:\n * * `'image'`: Vector tiles are rendered as images. Great performance, but\n * point symbols and texts are always rotated with the view and pixels are\n * scaled during zoom animations.\n * * `'hybrid'`: Polygon and line elements are rendered as images, so pixels\n * are scaled during zoom animations. Point symbols and texts are accurately\n * rendered as vectors and can stay upright on rotated views.\n * * `'vector'`: Vector tiles are rendered as vectors. Most accurate rendering\n * even during animations, but slower performance than the other options.\n * @api\n */\nexport const RenderType = {\n IMAGE: 'image',\n HYBRID: 'hybrid',\n VECTOR: 'vector'\n};\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [opacity=1] Opacity (0, 1).\n * @property {boolean} [visible=true] Visibility.\n * @property {module:ol/extent~Extent} [extent] The bounding extent for layer rendering. The layer will not be\n * rendered outside of this extent.\n * @property {number} [zIndex=0] The z-index for layer rendering. At rendering time, the layers\n * will be ordered, first by Z-index and then by position.\n * @property {number} [minResolution] The minimum resolution (inclusive) at which this layer will be\n * visible.\n * @property {number} [maxResolution] The maximum resolution (exclusive) below which this layer will\n * be visible.\n * @property {module:ol/render~OrderFunction} [renderOrder] Render order. Function to be used when sorting\n * features before rendering. By default features are drawn in the order that they are created. Use\n * `null` to avoid the sort, but get an undefined draw order.\n * @property {number} [renderBuffer=100] The buffer in pixels around the tile extent used by the\n * renderer when getting features from the vector tile for the rendering or hit-detection.\n * Recommended value: Vector tiles are usually generated with a buffer, so this value should match\n * the largest possible buffer of the used tiles. It should be at least the size of the largest\n * point symbol or line width.\n * @property {module:ol/layer/VectorTileRenderType|string} [renderMode='hybrid'] Render mode for vector tiles:\n * * `'image'`: Vector tiles are rendered as images. Great performance, but point symbols and texts\n * are always rotated with the view and pixels are scaled during zoom animations.\n * * `'hybrid'`: Polygon and line elements are rendered as images, so pixels are scaled during zoom\n * animations. Point symbols and texts are accurately rendered as vectors and can stay upright on\n * rotated views.\n * * `'vector'`: Vector tiles are rendered as vectors. Most accurate rendering even during\n * animations, but slower performance than the other options.\n *\n * When `declutter` is set to `true`, `'hybrid'` will be used instead of `'image'`.\n * @property {module:ol/source/VectorTile} [source] Source.\n * @property {module:ol/PluggableMap} [map] Sets the layer as overlay on a map. The map will not manage\n * this layer in its layers collection, and the layer will be rendered on top. This is useful for\n * temporary layers. The standard way to add a layer to a map and have it managed by the map is to\n * use {@link module:ol/Map#addLayer}.\n * @property {boolean} [declutter=false] Declutter images and text. Decluttering is applied to all\n * image and text styles, and the priority is defined by the z-index of the style. Lower z-index\n * means higher priority. When set to `true`, a `renderMode` of `'image'` will be overridden with\n * `'hybrid'`.\n * @property {module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction} [style] Layer style. See\n * {@link module:ol/style} for default style which will be used if this is not defined.\n * @property {boolean} [updateWhileAnimating=false] When set to `true`, feature batches will be\n * recreated during animations. This means that no vectors will be shown clipped, but the setting\n * will have a performance impact for large amounts of vector data. When set to `false`, batches\n * will be recreated when no animation is active.\n * @property {boolean} [updateWhileInteracting=false] When set to `true`, feature batches will be\n * recreated during interactions. See also `updateWhileAnimating`.\n * @property {number} [preload=0] Preload. Load low-resolution tiles up to `preload` levels. `0`\n * means no preloading.\n * @property {module:ol/render~OrderFunction} [renderOrder] Render order. Function to be used when sorting\n * features before rendering. By default features are drawn in the order that they are created.\n * @property {(module:ol/style/Style|Array.<module:ol/style/Style>|module:ol/style/Style~StyleFunction)} [style] Layer style. See\n * {@link module:ol/style} for default style which will be used if this is not defined.\n * @property {boolean} [useInterimTilesOnError=true] Use interim tiles on error.\n */\n\n\n/**\n * @classdesc\n * Layer for vector tile data that is rendered client-side.\n * Note that any property set in the options is set as a {@link module:ol/Object~BaseObject}\n * property on the layer object; for example, setting `title: 'My Title'` in the\n * options means that `title` is observable, and has get/set accessors.\n *\n * @constructor\n * @extends {module:ol/layer/Vector}\n * @param {module:ol/layer/VectorTile~Options=} opt_options Options.\n * @api\n */\nconst VectorTileLayer = function(opt_options) {\n const options = opt_options ? opt_options : {};\n\n let renderMode = options.renderMode || VectorTileRenderType.HYBRID;\n assert(renderMode == undefined ||\n renderMode == VectorTileRenderType.IMAGE ||\n renderMode == VectorTileRenderType.HYBRID ||\n renderMode == VectorTileRenderType.VECTOR,\n 28); // `renderMode` must be `'image'`, `'hybrid'` or `'vector'`\n if (options.declutter && renderMode == VectorTileRenderType.IMAGE) {\n renderMode = VectorTileRenderType.HYBRID;\n }\n options.renderMode = renderMode;\n\n const baseOptions = assign({}, options);\n\n delete baseOptions.preload;\n delete baseOptions.useInterimTilesOnError;\n VectorLayer.call(this, /** @type {module:ol/layer/Vector~Options} */ (baseOptions));\n\n this.setPreload(options.preload ? options.preload : 0);\n this.setUseInterimTilesOnError(options.useInterimTilesOnError !== undefined ?\n options.useInterimTilesOnError : true);\n\n /**\n * The layer type.\n * @protected\n * @type {module:ol/LayerType}\n */\n this.type = LayerType.VECTOR_TILE;\n\n};\n\ninherits(VectorTileLayer, VectorLayer);\n\n\n/**\n * Return the level as number to which we will preload tiles up to.\n * @return {number} The level to preload tiles up to.\n * @observable\n * @api\n */\nVectorTileLayer.prototype.getPreload = function() {\n return /** @type {number} */ (this.get(TileProperty.PRELOAD));\n};\n\n\n/**\n * Whether we use interim tiles on error.\n * @return {boolean} Use interim tiles on error.\n * @observable\n * @api\n */\nVectorTileLayer.prototype.getUseInterimTilesOnError = function() {\n return /** @type {boolean} */ (this.get(TileProperty.USE_INTERIM_TILES_ON_ERROR));\n};\n\n\n/**\n * Set the level as number to which we will preload tiles up to.\n * @param {number} preload The level to preload tiles up to.\n * @observable\n * @api\n */\nVectorTileLayer.prototype.setPreload = function(preload) {\n this.set(TileProperty.PRELOAD, preload);\n};\n\n\n/**\n * Set whether we use interim tiles on error.\n * @param {boolean} useInterimTilesOnError Use interim tiles on error.\n * @observable\n * @api\n */\nVectorTileLayer.prototype.setUseInterimTilesOnError = function(useInterimTilesOnError) {\n this.set(TileProperty.USE_INTERIM_TILES_ON_ERROR, useInterimTilesOnError);\n};\n\n\n/**\n * Return the associated {@link module:ol/source/VectorTile vectortilesource} of the layer.\n * @function\n * @return {module:ol/source/VectorTile} Source.\n * @api\n */\nVectorTileLayer.prototype.getSource;\nexport default VectorTileLayer;\n","/**\n * @module ol/tilecoord\n */\n\n\n/**\n * An array of three numbers representing the location of a tile in a tile\n * grid. The order is `z`, `x`, and `y`. `z` is the zoom level.\n * @typedef {Array.<number>} TileCoord\n * @api\n */\n\n\n/**\n * @param {number} z Z.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {module:ol/tilecoord~TileCoord=} opt_tileCoord Tile coordinate.\n * @return {module:ol/tilecoord~TileCoord} Tile coordinate.\n */\nexport function createOrUpdate(z, x, y, opt_tileCoord) {\n if (opt_tileCoord !== undefined) {\n opt_tileCoord[0] = z;\n opt_tileCoord[1] = x;\n opt_tileCoord[2] = y;\n return opt_tileCoord;\n } else {\n return [z, x, y];\n }\n}\n\n\n/**\n * @param {number} z Z.\n * @param {number} x X.\n * @param {number} y Y.\n * @return {string} Key.\n */\nexport function getKeyZXY(z, x, y) {\n return z + '/' + x + '/' + y;\n}\n\n\n/**\n * Get the key for a tile coord.\n * @param {module:ol/tilecoord~TileCoord} tileCoord The tile coord.\n * @return {string} Key.\n */\nexport function getKey(tileCoord) {\n return getKeyZXY(tileCoord[0], tileCoord[1], tileCoord[2]);\n}\n\n\n/**\n * Get a tile coord given a key.\n * @param {string} key The tile coord key.\n * @return {module:ol/tilecoord~TileCoord} The tile coord.\n */\nexport function fromKey(key) {\n return key.split('/').map(Number);\n}\n\n\n/**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coord.\n * @return {number} Hash.\n */\nexport function hash(tileCoord) {\n return (tileCoord[1] << tileCoord[0]) + tileCoord[2];\n}\n\n\n/**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coord.\n * @return {string} Quad key.\n */\nexport function quadKey(tileCoord) {\n const z = tileCoord[0];\n const digits = new Array(z);\n let mask = 1 << (z - 1);\n let i, charCode;\n for (i = 0; i < z; ++i) {\n // 48 is charCode for 0 - '0'.charCodeAt(0)\n charCode = 48;\n if (tileCoord[1] & mask) {\n charCode += 1;\n }\n if (tileCoord[2] & mask) {\n charCode += 2;\n }\n digits[i] = String.fromCharCode(charCode);\n mask >>= 1;\n }\n return digits.join('');\n}\n\n\n/**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {!module:ol/tilegrid/TileGrid} tileGrid Tile grid.\n * @return {boolean} Tile coordinate is within extent and zoom level range.\n */\nexport function withinExtentAndZ(tileCoord, tileGrid) {\n const z = tileCoord[0];\n const x = tileCoord[1];\n const y = tileCoord[2];\n\n if (tileGrid.getMinZoom() > z || z > tileGrid.getMaxZoom()) {\n return false;\n }\n const extent = tileGrid.getExtent();\n let tileRange;\n if (!extent) {\n tileRange = tileGrid.getFullTileRange(z);\n } else {\n tileRange = tileGrid.getTileRangeForExtentAndZ(extent, z);\n }\n if (!tileRange) {\n return true;\n } else {\n return tileRange.containsXY(x, y);\n }\n}\n","/**\n * @module ol/tileurlfunction\n */\nimport {assert} from './asserts.js';\nimport {modulo} from './math.js';\nimport {hash as tileCoordHash} from './tilecoord.js';\n\n\n/**\n * @param {string} template Template.\n * @param {module:ol/tilegrid/TileGrid} tileGrid Tile grid.\n * @return {module:ol/Tile~UrlFunction} Tile URL function.\n */\nexport function createFromTemplate(template, tileGrid) {\n const zRegEx = /\\{z\\}/g;\n const xRegEx = /\\{x\\}/g;\n const yRegEx = /\\{y\\}/g;\n const dashYRegEx = /\\{-y\\}/g;\n return (\n /**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile Coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {string|undefined} Tile URL.\n */\n function(tileCoord, pixelRatio, projection) {\n if (!tileCoord) {\n return undefined;\n } else {\n return template.replace(zRegEx, tileCoord[0].toString())\n .replace(xRegEx, tileCoord[1].toString())\n .replace(yRegEx, function() {\n const y = -tileCoord[2] - 1;\n return y.toString();\n })\n .replace(dashYRegEx, function() {\n const z = tileCoord[0];\n const range = tileGrid.getFullTileRange(z);\n assert(range, 55); // The {-y} placeholder requires a tile grid with extent\n const y = range.getHeight() + tileCoord[2];\n return y.toString();\n });\n }\n }\n );\n}\n\n\n/**\n * @param {Array.<string>} templates Templates.\n * @param {module:ol/tilegrid/TileGrid} tileGrid Tile grid.\n * @return {module:ol/Tile~UrlFunction} Tile URL function.\n */\nexport function createFromTemplates(templates, tileGrid) {\n const len = templates.length;\n const tileUrlFunctions = new Array(len);\n for (let i = 0; i < len; ++i) {\n tileUrlFunctions[i] = createFromTemplate(templates[i], tileGrid);\n }\n return createFromTileUrlFunctions(tileUrlFunctions);\n}\n\n\n/**\n * @param {Array.<module:ol/Tile~UrlFunction>} tileUrlFunctions Tile URL Functions.\n * @return {module:ol/Tile~UrlFunction} Tile URL function.\n */\nexport function createFromTileUrlFunctions(tileUrlFunctions) {\n if (tileUrlFunctions.length === 1) {\n return tileUrlFunctions[0];\n }\n return (\n /**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile Coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {string|undefined} Tile URL.\n */\n function(tileCoord, pixelRatio, projection) {\n if (!tileCoord) {\n return undefined;\n } else {\n const h = tileCoordHash(tileCoord);\n const index = modulo(h, tileUrlFunctions.length);\n return tileUrlFunctions[index](tileCoord, pixelRatio, projection);\n }\n }\n );\n}\n\n\n/**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {string|undefined} Tile URL.\n */\nexport function nullTileUrlFunction(tileCoord, pixelRatio, projection) {\n return undefined;\n}\n\n\n/**\n * @param {string} url URL.\n * @return {Array.<string>} Array of urls.\n */\nexport function expandUrl(url) {\n const urls = [];\n let match = /\\{([a-z])-([a-z])\\}/.exec(url);\n if (match) {\n // char range\n const startCharCode = match[1].charCodeAt(0);\n const stopCharCode = match[2].charCodeAt(0);\n let charCode;\n for (charCode = startCharCode; charCode <= stopCharCode; ++charCode) {\n urls.push(url.replace(match[0], String.fromCharCode(charCode)));\n }\n return urls;\n }\n match = match = /\\{(\\d+)-(\\d+)\\}/.exec(url);\n if (match) {\n // number range\n const stop = parseInt(match[2], 10);\n for (let i = parseInt(match[1], 10); i <= stop; i++) {\n urls.push(url.replace(match[0], i.toString()));\n }\n return urls;\n }\n urls.push(url);\n return urls;\n}\n","/**\n * @module ol/net\n */\nimport {getUid} from './util.js';\n\n\n/**\n * Simple JSONP helper. Supports error callbacks and a custom callback param.\n * The error callback will be called when no JSONP is executed after 10 seconds.\n *\n * @param {string} url Request url. A 'callback' query parameter will be\n * appended.\n * @param {Function} callback Callback on success.\n * @param {function()=} opt_errback Callback on error.\n * @param {string=} opt_callbackParam Custom query parameter for the JSONP\n * callback. Default is 'callback'.\n */\nexport function jsonp(url, callback, opt_errback, opt_callbackParam) {\n const script = document.createElement('script');\n const key = 'olc_' + getUid(callback);\n function cleanup() {\n delete window[key];\n script.parentNode.removeChild(script);\n }\n script.async = true;\n script.src = url + (url.indexOf('?') == -1 ? '?' : '&') +\n (opt_callbackParam || 'callback') + '=' + key;\n const timer = setTimeout(function() {\n cleanup();\n if (opt_errback) {\n opt_errback();\n }\n }, 10000);\n window[key] = function(data) {\n clearTimeout(timer);\n cleanup();\n callback(data);\n };\n document.getElementsByTagName('head')[0].appendChild(script);\n}\n","/**\n * @module ol/TileCache\n */\nimport {inherits} from './util.js';\nimport LRUCache from './structs/LRUCache.js';\nimport {fromKey, getKey} from './tilecoord.js';\n\n/**\n * @constructor\n * @extends {module:ol/structs/LRUCache.<module:ol/Tile>}\n * @param {number=} opt_highWaterMark High water mark.\n * @struct\n */\nconst TileCache = function(opt_highWaterMark) {\n\n LRUCache.call(this, opt_highWaterMark);\n\n};\n\ninherits(TileCache, LRUCache);\n\n\n/**\n * @param {!Object.<string, module:ol/TileRange>} usedTiles Used tiles.\n */\nTileCache.prototype.expireCache = function(usedTiles) {\n while (this.canExpireCache()) {\n const tile = this.peekLast();\n const zKey = tile.tileCoord[0].toString();\n if (zKey in usedTiles && usedTiles[zKey].contains(tile.tileCoord)) {\n break;\n } else {\n this.pop().dispose();\n }\n }\n};\n\n\n/**\n * Prune all tiles from the cache that don't have the same z as the newest tile.\n */\nTileCache.prototype.pruneExceptNewestZ = function() {\n if (this.getCount() === 0) {\n return;\n }\n const key = this.peekFirstKey();\n const tileCoord = fromKey(key);\n const z = tileCoord[0];\n this.forEach(function(tile) {\n if (tile.tileCoord[0] !== z) {\n this.remove(getKey(tile.tileCoord));\n tile.dispose();\n }\n }, this);\n};\nexport default TileCache;\n","/**\n * @module ol/reproj\n */\nimport {createCanvasContext2D} from './dom.js';\nimport {containsCoordinate, createEmpty, extend, getHeight, getTopLeft, getWidth} from './extent.js';\nimport {solveLinearSystem} from './math.js';\nimport {getPointResolution, transform} from './proj.js';\n\n\n/**\n * Calculates ideal resolution to use from the source in order to achieve\n * pixel mapping as close as possible to 1:1 during reprojection.\n * The resolution is calculated regardless of what resolutions\n * are actually available in the dataset (TileGrid, Image, ...).\n *\n * @param {module:ol/proj/Projection} sourceProj Source projection.\n * @param {module:ol/proj/Projection} targetProj Target projection.\n * @param {module:ol/coordinate~Coordinate} targetCenter Target center.\n * @param {number} targetResolution Target resolution.\n * @return {number} The best resolution to use. Can be +-Infinity, NaN or 0.\n */\nexport function calculateSourceResolution(sourceProj, targetProj,\n targetCenter, targetResolution) {\n\n const sourceCenter = transform(targetCenter, targetProj, sourceProj);\n\n // calculate the ideal resolution of the source data\n let sourceResolution = getPointResolution(targetProj, targetResolution, targetCenter);\n\n const targetMetersPerUnit = targetProj.getMetersPerUnit();\n if (targetMetersPerUnit !== undefined) {\n sourceResolution *= targetMetersPerUnit;\n }\n const sourceMetersPerUnit = sourceProj.getMetersPerUnit();\n if (sourceMetersPerUnit !== undefined) {\n sourceResolution /= sourceMetersPerUnit;\n }\n\n // Based on the projection properties, the point resolution at the specified\n // coordinates may be slightly different. We need to reverse-compensate this\n // in order to achieve optimal results.\n\n const sourceExtent = sourceProj.getExtent();\n if (!sourceExtent || containsCoordinate(sourceExtent, sourceCenter)) {\n const compensationFactor = getPointResolution(sourceProj, sourceResolution, sourceCenter) /\n sourceResolution;\n if (isFinite(compensationFactor) && compensationFactor > 0) {\n sourceResolution /= compensationFactor;\n }\n }\n\n return sourceResolution;\n}\n\n\n/**\n * Enlarge the clipping triangle point by 1 pixel to ensure the edges overlap\n * in order to mask gaps caused by antialiasing.\n *\n * @param {number} centroidX Centroid of the triangle (x coordinate in pixels).\n * @param {number} centroidY Centroid of the triangle (y coordinate in pixels).\n * @param {number} x X coordinate of the point (in pixels).\n * @param {number} y Y coordinate of the point (in pixels).\n * @return {module:ol/coordinate~Coordinate} New point 1 px farther from the centroid.\n */\nfunction enlargeClipPoint(centroidX, centroidY, x, y) {\n const dX = x - centroidX;\n const dY = y - centroidY;\n const distance = Math.sqrt(dX * dX + dY * dY);\n return [Math.round(x + dX / distance), Math.round(y + dY / distance)];\n}\n\n\n/**\n * Renders the source data into new canvas based on the triangulation.\n *\n * @param {number} width Width of the canvas.\n * @param {number} height Height of the canvas.\n * @param {number} pixelRatio Pixel ratio.\n * @param {number} sourceResolution Source resolution.\n * @param {module:ol/extent~Extent} sourceExtent Extent of the data source.\n * @param {number} targetResolution Target resolution.\n * @param {module:ol/extent~Extent} targetExtent Target extent.\n * @param {module:ol/reproj/Triangulation} triangulation\n * Calculated triangulation.\n * @param {Array.<{extent: module:ol/extent~Extent,\n * image: (HTMLCanvasElement|Image|HTMLVideoElement)}>} sources\n * Array of sources.\n * @param {number} gutter Gutter of the sources.\n * @param {boolean=} opt_renderEdges Render reprojection edges.\n * @return {HTMLCanvasElement} Canvas with reprojected data.\n */\nexport function render(width, height, pixelRatio,\n sourceResolution, sourceExtent, targetResolution, targetExtent,\n triangulation, sources, gutter, opt_renderEdges) {\n\n const context = createCanvasContext2D(Math.round(pixelRatio * width),\n Math.round(pixelRatio * height));\n\n if (sources.length === 0) {\n return context.canvas;\n }\n\n context.scale(pixelRatio, pixelRatio);\n\n const sourceDataExtent = createEmpty();\n sources.forEach(function(src, i, arr) {\n extend(sourceDataExtent, src.extent);\n });\n\n const canvasWidthInUnits = getWidth(sourceDataExtent);\n const canvasHeightInUnits = getHeight(sourceDataExtent);\n const stitchContext = createCanvasContext2D(\n Math.round(pixelRatio * canvasWidthInUnits / sourceResolution),\n Math.round(pixelRatio * canvasHeightInUnits / sourceResolution));\n\n const stitchScale = pixelRatio / sourceResolution;\n\n sources.forEach(function(src, i, arr) {\n const xPos = src.extent[0] - sourceDataExtent[0];\n const yPos = -(src.extent[3] - sourceDataExtent[3]);\n const srcWidth = getWidth(src.extent);\n const srcHeight = getHeight(src.extent);\n\n stitchContext.drawImage(\n src.image,\n gutter, gutter,\n src.image.width - 2 * gutter, src.image.height - 2 * gutter,\n xPos * stitchScale, yPos * stitchScale,\n srcWidth * stitchScale, srcHeight * stitchScale);\n });\n\n const targetTopLeft = getTopLeft(targetExtent);\n\n triangulation.getTriangles().forEach(function(triangle, i, arr) {\n /* Calculate affine transform (src -> dst)\n * Resulting matrix can be used to transform coordinate\n * from `sourceProjection` to destination pixels.\n *\n * To optimize number of context calls and increase numerical stability,\n * we also do the following operations:\n * trans(-topLeftExtentCorner), scale(1 / targetResolution), scale(1, -1)\n * here before solving the linear system so [ui, vi] are pixel coordinates.\n *\n * Src points: xi, yi\n * Dst points: ui, vi\n * Affine coefficients: aij\n *\n * | x0 y0 1 0 0 0 | |a00| |u0|\n * | x1 y1 1 0 0 0 | |a01| |u1|\n * | x2 y2 1 0 0 0 | x |a02| = |u2|\n * | 0 0 0 x0 y0 1 | |a10| |v0|\n * | 0 0 0 x1 y1 1 | |a11| |v1|\n * | 0 0 0 x2 y2 1 | |a12| |v2|\n */\n const source = triangle.source;\n const target = triangle.target;\n let x0 = source[0][0], y0 = source[0][1];\n let x1 = source[1][0], y1 = source[1][1];\n let x2 = source[2][0], y2 = source[2][1];\n const u0 = (target[0][0] - targetTopLeft[0]) / targetResolution;\n const v0 = -(target[0][1] - targetTopLeft[1]) / targetResolution;\n const u1 = (target[1][0] - targetTopLeft[0]) / targetResolution;\n const v1 = -(target[1][1] - targetTopLeft[1]) / targetResolution;\n const u2 = (target[2][0] - targetTopLeft[0]) / targetResolution;\n const v2 = -(target[2][1] - targetTopLeft[1]) / targetResolution;\n\n // Shift all the source points to improve numerical stability\n // of all the subsequent calculations. The [x0, y0] is used here.\n // This is also used to simplify the linear system.\n const sourceNumericalShiftX = x0;\n const sourceNumericalShiftY = y0;\n x0 = 0;\n y0 = 0;\n x1 -= sourceNumericalShiftX;\n y1 -= sourceNumericalShiftY;\n x2 -= sourceNumericalShiftX;\n y2 -= sourceNumericalShiftY;\n\n const augmentedMatrix = [\n [x1, y1, 0, 0, u1 - u0],\n [x2, y2, 0, 0, u2 - u0],\n [0, 0, x1, y1, v1 - v0],\n [0, 0, x2, y2, v2 - v0]\n ];\n const affineCoefs = solveLinearSystem(augmentedMatrix);\n if (!affineCoefs) {\n return;\n }\n\n context.save();\n context.beginPath();\n const centroidX = (u0 + u1 + u2) / 3;\n const centroidY = (v0 + v1 + v2) / 3;\n const p0 = enlargeClipPoint(centroidX, centroidY, u0, v0);\n const p1 = enlargeClipPoint(centroidX, centroidY, u1, v1);\n const p2 = enlargeClipPoint(centroidX, centroidY, u2, v2);\n\n context.moveTo(p1[0], p1[1]);\n context.lineTo(p0[0], p0[1]);\n context.lineTo(p2[0], p2[1]);\n context.clip();\n\n context.transform(\n affineCoefs[0], affineCoefs[2], affineCoefs[1], affineCoefs[3], u0, v0);\n\n context.translate(sourceDataExtent[0] - sourceNumericalShiftX,\n sourceDataExtent[3] - sourceNumericalShiftY);\n\n context.scale(sourceResolution / pixelRatio,\n -sourceResolution / pixelRatio);\n\n context.drawImage(stitchContext.canvas, 0, 0);\n context.restore();\n });\n\n if (opt_renderEdges) {\n context.save();\n\n context.strokeStyle = 'black';\n context.lineWidth = 1;\n\n triangulation.getTriangles().forEach(function(triangle, i, arr) {\n const target = triangle.target;\n const u0 = (target[0][0] - targetTopLeft[0]) / targetResolution;\n const v0 = -(target[0][1] - targetTopLeft[1]) / targetResolution;\n const u1 = (target[1][0] - targetTopLeft[0]) / targetResolution;\n const v1 = -(target[1][1] - targetTopLeft[1]) / targetResolution;\n const u2 = (target[2][0] - targetTopLeft[0]) / targetResolution;\n const v2 = -(target[2][1] - targetTopLeft[1]) / targetResolution;\n\n context.beginPath();\n context.moveTo(u1, v1);\n context.lineTo(u0, v0);\n context.lineTo(u2, v2);\n context.closePath();\n context.stroke();\n });\n\n context.restore();\n }\n return context.canvas;\n}\n","/**\n * @module ol/reproj/Triangulation\n */\nimport {boundingExtent, createEmpty, extendCoordinate, getBottomLeft, getBottomRight,\n getTopLeft, getTopRight, getWidth, intersects} from '../extent.js';\nimport {modulo} from '../math.js';\nimport {getTransform} from '../proj.js';\n\n\n/**\n * Single triangle; consists of 3 source points and 3 target points.\n * @typedef {Object} Triangle\n * @property {Array.<module:ol/coordinate~Coordinate>} source\n * @property {Array.<module:ol/coordinate~Coordinate>} target\n */\n\n\n/**\n * Maximum number of subdivision steps during raster reprojection triangulation.\n * Prevents high memory usage and large number of proj4 calls (for certain\n * transformations and areas). At most `2*(2^this)` triangles are created for\n * each triangulated extent (tile/image).\n * @type {number}\n */\nconst MAX_SUBDIVISION = 10;\n\n\n/**\n * Maximum allowed size of triangle relative to world width. When transforming\n * corners of world extent between certain projections, the resulting\n * triangulation seems to have zero error and no subdivision is performed. If\n * the triangle width is more than this (relative to world width; 0-1),\n * subdivison is forced (up to `MAX_SUBDIVISION`). Default is `0.25`.\n * @type {number}\n */\nconst MAX_TRIANGLE_WIDTH = 0.25;\n\n\n/**\n * @classdesc\n * Class containing triangulation of the given target extent.\n * Used for determining source data and the reprojection itself.\n *\n * @param {module:ol/proj/Projection} sourceProj Source projection.\n * @param {module:ol/proj/Projection} targetProj Target projection.\n * @param {module:ol/extent~Extent} targetExtent Target extent to triangulate.\n * @param {module:ol/extent~Extent} maxSourceExtent Maximal source extent that can be used.\n * @param {number} errorThreshold Acceptable error (in source units).\n * @constructor\n */\nconst Triangulation = function(sourceProj, targetProj, targetExtent,\n maxSourceExtent, errorThreshold) {\n\n /**\n * @type {module:ol/proj/Projection}\n * @private\n */\n this.sourceProj_ = sourceProj;\n\n /**\n * @type {module:ol/proj/Projection}\n * @private\n */\n this.targetProj_ = targetProj;\n\n /** @type {!Object.<string, module:ol/coordinate~Coordinate>} */\n let transformInvCache = {};\n const transformInv = getTransform(this.targetProj_, this.sourceProj_);\n\n /**\n * @param {module:ol/coordinate~Coordinate} c A coordinate.\n * @return {module:ol/coordinate~Coordinate} Transformed coordinate.\n * @private\n */\n this.transformInv_ = function(c) {\n const key = c[0] + '/' + c[1];\n if (!transformInvCache[key]) {\n transformInvCache[key] = transformInv(c);\n }\n return transformInvCache[key];\n };\n\n /**\n * @type {module:ol/extent~Extent}\n * @private\n */\n this.maxSourceExtent_ = maxSourceExtent;\n\n /**\n * @type {number}\n * @private\n */\n this.errorThresholdSquared_ = errorThreshold * errorThreshold;\n\n /**\n * @type {Array.<module:ol/reproj/Triangulation~Triangle>}\n * @private\n */\n this.triangles_ = [];\n\n /**\n * Indicates that the triangulation crosses edge of the source projection.\n * @type {boolean}\n * @private\n */\n this.wrapsXInSource_ = false;\n\n /**\n * @type {boolean}\n * @private\n */\n this.canWrapXInSource_ = this.sourceProj_.canWrapX() &&\n !!maxSourceExtent &&\n !!this.sourceProj_.getExtent() &&\n (getWidth(maxSourceExtent) == getWidth(this.sourceProj_.getExtent()));\n\n /**\n * @type {?number}\n * @private\n */\n this.sourceWorldWidth_ = this.sourceProj_.getExtent() ?\n getWidth(this.sourceProj_.getExtent()) : null;\n\n /**\n * @type {?number}\n * @private\n */\n this.targetWorldWidth_ = this.targetProj_.getExtent() ?\n getWidth(this.targetProj_.getExtent()) : null;\n\n const destinationTopLeft = getTopLeft(targetExtent);\n const destinationTopRight = getTopRight(targetExtent);\n const destinationBottomRight = getBottomRight(targetExtent);\n const destinationBottomLeft = getBottomLeft(targetExtent);\n const sourceTopLeft = this.transformInv_(destinationTopLeft);\n const sourceTopRight = this.transformInv_(destinationTopRight);\n const sourceBottomRight = this.transformInv_(destinationBottomRight);\n const sourceBottomLeft = this.transformInv_(destinationBottomLeft);\n\n this.addQuad_(\n destinationTopLeft, destinationTopRight,\n destinationBottomRight, destinationBottomLeft,\n sourceTopLeft, sourceTopRight, sourceBottomRight, sourceBottomLeft,\n MAX_SUBDIVISION);\n\n if (this.wrapsXInSource_) {\n let leftBound = Infinity;\n this.triangles_.forEach(function(triangle, i, arr) {\n leftBound = Math.min(leftBound,\n triangle.source[0][0], triangle.source[1][0], triangle.source[2][0]);\n });\n\n // Shift triangles to be as close to `leftBound` as possible\n // (if the distance is more than `worldWidth / 2` it can be closer.\n this.triangles_.forEach(function(triangle) {\n if (Math.max(triangle.source[0][0], triangle.source[1][0],\n triangle.source[2][0]) - leftBound > this.sourceWorldWidth_ / 2) {\n const newTriangle = [[triangle.source[0][0], triangle.source[0][1]],\n [triangle.source[1][0], triangle.source[1][1]],\n [triangle.source[2][0], triangle.source[2][1]]];\n if ((newTriangle[0][0] - leftBound) > this.sourceWorldWidth_ / 2) {\n newTriangle[0][0] -= this.sourceWorldWidth_;\n }\n if ((newTriangle[1][0] - leftBound) > this.sourceWorldWidth_ / 2) {\n newTriangle[1][0] -= this.sourceWorldWidth_;\n }\n if ((newTriangle[2][0] - leftBound) > this.sourceWorldWidth_ / 2) {\n newTriangle[2][0] -= this.sourceWorldWidth_;\n }\n\n // Rarely (if the extent contains both the dateline and prime meridian)\n // the shift can in turn break some triangles.\n // Detect this here and don't shift in such cases.\n const minX = Math.min(\n newTriangle[0][0], newTriangle[1][0], newTriangle[2][0]);\n const maxX = Math.max(\n newTriangle[0][0], newTriangle[1][0], newTriangle[2][0]);\n if ((maxX - minX) < this.sourceWorldWidth_ / 2) {\n triangle.source = newTriangle;\n }\n }\n }.bind(this));\n }\n\n transformInvCache = {};\n};\n\n\n/**\n * Adds triangle to the triangulation.\n * @param {module:ol/coordinate~Coordinate} a The target a coordinate.\n * @param {module:ol/coordinate~Coordinate} b The target b coordinate.\n * @param {module:ol/coordinate~Coordinate} c The target c coordinate.\n * @param {module:ol/coordinate~Coordinate} aSrc The source a coordinate.\n * @param {module:ol/coordinate~Coordinate} bSrc The source b coordinate.\n * @param {module:ol/coordinate~Coordinate} cSrc The source c coordinate.\n * @private\n */\nTriangulation.prototype.addTriangle_ = function(a, b, c,\n aSrc, bSrc, cSrc) {\n this.triangles_.push({\n source: [aSrc, bSrc, cSrc],\n target: [a, b, c]\n });\n};\n\n\n/**\n * Adds quad (points in clock-wise order) to the triangulation\n * (and reprojects the vertices) if valid.\n * Performs quad subdivision if needed to increase precision.\n *\n * @param {module:ol/coordinate~Coordinate} a The target a coordinate.\n * @param {module:ol/coordinate~Coordinate} b The target b coordinate.\n * @param {module:ol/coordinate~Coordinate} c The target c coordinate.\n * @param {module:ol/coordinate~Coordinate} d The target d coordinate.\n * @param {module:ol/coordinate~Coordinate} aSrc The source a coordinate.\n * @param {module:ol/coordinate~Coordinate} bSrc The source b coordinate.\n * @param {module:ol/coordinate~Coordinate} cSrc The source c coordinate.\n * @param {module:ol/coordinate~Coordinate} dSrc The source d coordinate.\n * @param {number} maxSubdivision Maximal allowed subdivision of the quad.\n * @private\n */\nTriangulation.prototype.addQuad_ = function(a, b, c, d,\n aSrc, bSrc, cSrc, dSrc, maxSubdivision) {\n\n const sourceQuadExtent = boundingExtent([aSrc, bSrc, cSrc, dSrc]);\n const sourceCoverageX = this.sourceWorldWidth_ ?\n getWidth(sourceQuadExtent) / this.sourceWorldWidth_ : null;\n const sourceWorldWidth = /** @type {number} */ (this.sourceWorldWidth_);\n\n // when the quad is wrapped in the source projection\n // it covers most of the projection extent, but not fully\n const wrapsX = this.sourceProj_.canWrapX() &&\n sourceCoverageX > 0.5 && sourceCoverageX < 1;\n\n let needsSubdivision = false;\n\n if (maxSubdivision > 0) {\n if (this.targetProj_.isGlobal() && this.targetWorldWidth_) {\n const targetQuadExtent = boundingExtent([a, b, c, d]);\n const targetCoverageX = getWidth(targetQuadExtent) / this.targetWorldWidth_;\n needsSubdivision |=\n targetCoverageX > MAX_TRIANGLE_WIDTH;\n }\n if (!wrapsX && this.sourceProj_.isGlobal() && sourceCoverageX) {\n needsSubdivision |=\n sourceCoverageX > MAX_TRIANGLE_WIDTH;\n }\n }\n\n if (!needsSubdivision && this.maxSourceExtent_) {\n if (!intersects(sourceQuadExtent, this.maxSourceExtent_)) {\n // whole quad outside source projection extent -> ignore\n return;\n }\n }\n\n if (!needsSubdivision) {\n if (!isFinite(aSrc[0]) || !isFinite(aSrc[1]) ||\n !isFinite(bSrc[0]) || !isFinite(bSrc[1]) ||\n !isFinite(cSrc[0]) || !isFinite(cSrc[1]) ||\n !isFinite(dSrc[0]) || !isFinite(dSrc[1])) {\n if (maxSubdivision > 0) {\n needsSubdivision = true;\n } else {\n return;\n }\n }\n }\n\n if (maxSubdivision > 0) {\n if (!needsSubdivision) {\n const center = [(a[0] + c[0]) / 2, (a[1] + c[1]) / 2];\n const centerSrc = this.transformInv_(center);\n\n let dx;\n if (wrapsX) {\n const centerSrcEstimX =\n (modulo(aSrc[0], sourceWorldWidth) +\n modulo(cSrc[0], sourceWorldWidth)) / 2;\n dx = centerSrcEstimX -\n modulo(centerSrc[0], sourceWorldWidth);\n } else {\n dx = (aSrc[0] + cSrc[0]) / 2 - centerSrc[0];\n }\n const dy = (aSrc[1] + cSrc[1]) / 2 - centerSrc[1];\n const centerSrcErrorSquared = dx * dx + dy * dy;\n needsSubdivision = centerSrcErrorSquared > this.errorThresholdSquared_;\n }\n if (needsSubdivision) {\n if (Math.abs(a[0] - c[0]) <= Math.abs(a[1] - c[1])) {\n // split horizontally (top & bottom)\n const bc = [(b[0] + c[0]) / 2, (b[1] + c[1]) / 2];\n const bcSrc = this.transformInv_(bc);\n const da = [(d[0] + a[0]) / 2, (d[1] + a[1]) / 2];\n const daSrc = this.transformInv_(da);\n\n this.addQuad_(\n a, b, bc, da, aSrc, bSrc, bcSrc, daSrc, maxSubdivision - 1);\n this.addQuad_(\n da, bc, c, d, daSrc, bcSrc, cSrc, dSrc, maxSubdivision - 1);\n } else {\n // split vertically (left & right)\n const ab = [(a[0] + b[0]) / 2, (a[1] + b[1]) / 2];\n const abSrc = this.transformInv_(ab);\n const cd = [(c[0] + d[0]) / 2, (c[1] + d[1]) / 2];\n const cdSrc = this.transformInv_(cd);\n\n this.addQuad_(\n a, ab, cd, d, aSrc, abSrc, cdSrc, dSrc, maxSubdivision - 1);\n this.addQuad_(\n ab, b, c, cd, abSrc, bSrc, cSrc, cdSrc, maxSubdivision - 1);\n }\n return;\n }\n }\n\n if (wrapsX) {\n if (!this.canWrapXInSource_) {\n return;\n }\n this.wrapsXInSource_ = true;\n }\n\n this.addTriangle_(a, c, d, aSrc, cSrc, dSrc);\n this.addTriangle_(a, b, c, aSrc, bSrc, cSrc);\n};\n\n\n/**\n * Calculates extent of the 'source' coordinates from all the triangles.\n *\n * @return {module:ol/extent~Extent} Calculated extent.\n */\nTriangulation.prototype.calculateSourceExtent = function() {\n const extent = createEmpty();\n\n this.triangles_.forEach(function(triangle, i, arr) {\n const src = triangle.source;\n extendCoordinate(extent, src[0]);\n extendCoordinate(extent, src[1]);\n extendCoordinate(extent, src[2]);\n });\n\n return extent;\n};\n\n\n/**\n * @return {Array.<module:ol/reproj/Triangulation~Triangle>} Array of the calculated triangles.\n */\nTriangulation.prototype.getTriangles = function() {\n return this.triangles_;\n};\nexport default Triangulation;\n","/**\n * @module ol/reproj/Tile\n */\nimport {ERROR_THRESHOLD} from './common.js';\nimport {inherits} from '../util.js';\nimport Tile from '../Tile.js';\nimport TileState from '../TileState.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getArea, getCenter, getIntersection} from '../extent.js';\nimport {clamp} from '../math.js';\nimport {calculateSourceResolution, render as renderReprojected} from '../reproj.js';\nimport Triangulation from '../reproj/Triangulation.js';\n\n\n/**\n * @typedef {function(number, number, number, number) : module:ol/Tile} FunctionType\n */\n\n\n/**\n * @classdesc\n * Class encapsulating single reprojected tile.\n * See {@link module:ol/source/TileImage~TileImage}.\n *\n * @constructor\n * @extends {module:ol/Tile}\n * @param {module:ol/proj/Projection} sourceProj Source projection.\n * @param {module:ol/tilegrid/TileGrid} sourceTileGrid Source tile grid.\n * @param {module:ol/proj/Projection} targetProj Target projection.\n * @param {module:ol/tilegrid/TileGrid} targetTileGrid Target tile grid.\n * @param {module:ol/tilecoord~TileCoord} tileCoord Coordinate of the tile.\n * @param {module:ol/tilecoord~TileCoord} wrappedTileCoord Coordinate of the tile wrapped in X.\n * @param {number} pixelRatio Pixel ratio.\n * @param {number} gutter Gutter of the source tiles.\n * @param {module:ol/reproj/Tile~FunctionType} getTileFunction\n * Function returning source tiles (z, x, y, pixelRatio).\n * @param {number=} opt_errorThreshold Acceptable reprojection error (in px).\n * @param {boolean=} opt_renderEdges Render reprojection edges.\n */\nconst ReprojTile = function(sourceProj, sourceTileGrid,\n targetProj, targetTileGrid, tileCoord, wrappedTileCoord,\n pixelRatio, gutter, getTileFunction,\n opt_errorThreshold, opt_renderEdges) {\n Tile.call(this, tileCoord, TileState.IDLE);\n\n /**\n * @private\n * @type {boolean}\n */\n this.renderEdges_ = opt_renderEdges !== undefined ? opt_renderEdges : false;\n\n /**\n * @private\n * @type {number}\n */\n this.pixelRatio_ = pixelRatio;\n\n /**\n * @private\n * @type {number}\n */\n this.gutter_ = gutter;\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = null;\n\n /**\n * @private\n * @type {module:ol/tilegrid/TileGrid}\n */\n this.sourceTileGrid_ = sourceTileGrid;\n\n /**\n * @private\n * @type {module:ol/tilegrid/TileGrid}\n */\n this.targetTileGrid_ = targetTileGrid;\n\n /**\n * @private\n * @type {module:ol/tilecoord~TileCoord}\n */\n this.wrappedTileCoord_ = wrappedTileCoord ? wrappedTileCoord : tileCoord;\n\n /**\n * @private\n * @type {!Array.<module:ol/Tile>}\n */\n this.sourceTiles_ = [];\n\n /**\n * @private\n * @type {Array.<module:ol/events~EventsKey>}\n */\n this.sourcesListenerKeys_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.sourceZ_ = 0;\n\n const targetExtent = targetTileGrid.getTileCoordExtent(this.wrappedTileCoord_);\n const maxTargetExtent = this.targetTileGrid_.getExtent();\n let maxSourceExtent = this.sourceTileGrid_.getExtent();\n\n const limitedTargetExtent = maxTargetExtent ?\n getIntersection(targetExtent, maxTargetExtent) : targetExtent;\n\n if (getArea(limitedTargetExtent) === 0) {\n // Tile is completely outside range -> EMPTY\n // TODO: is it actually correct that the source even creates the tile ?\n this.state = TileState.EMPTY;\n return;\n }\n\n const sourceProjExtent = sourceProj.getExtent();\n if (sourceProjExtent) {\n if (!maxSourceExtent) {\n maxSourceExtent = sourceProjExtent;\n } else {\n maxSourceExtent = getIntersection(maxSourceExtent, sourceProjExtent);\n }\n }\n\n const targetResolution = targetTileGrid.getResolution(\n this.wrappedTileCoord_[0]);\n\n const targetCenter = getCenter(limitedTargetExtent);\n const sourceResolution = calculateSourceResolution(\n sourceProj, targetProj, targetCenter, targetResolution);\n\n if (!isFinite(sourceResolution) || sourceResolution <= 0) {\n // invalid sourceResolution -> EMPTY\n // probably edges of the projections when no extent is defined\n this.state = TileState.EMPTY;\n return;\n }\n\n const errorThresholdInPixels = opt_errorThreshold !== undefined ?\n opt_errorThreshold : ERROR_THRESHOLD;\n\n /**\n * @private\n * @type {!module:ol/reproj/Triangulation}\n */\n this.triangulation_ = new Triangulation(\n sourceProj, targetProj, limitedTargetExtent, maxSourceExtent,\n sourceResolution * errorThresholdInPixels);\n\n if (this.triangulation_.getTriangles().length === 0) {\n // no valid triangles -> EMPTY\n this.state = TileState.EMPTY;\n return;\n }\n\n this.sourceZ_ = sourceTileGrid.getZForResolution(sourceResolution);\n let sourceExtent = this.triangulation_.calculateSourceExtent();\n\n if (maxSourceExtent) {\n if (sourceProj.canWrapX()) {\n sourceExtent[1] = clamp(\n sourceExtent[1], maxSourceExtent[1], maxSourceExtent[3]);\n sourceExtent[3] = clamp(\n sourceExtent[3], maxSourceExtent[1], maxSourceExtent[3]);\n } else {\n sourceExtent = getIntersection(sourceExtent, maxSourceExtent);\n }\n }\n\n if (!getArea(sourceExtent)) {\n this.state = TileState.EMPTY;\n } else {\n const sourceRange = sourceTileGrid.getTileRangeForExtentAndZ(\n sourceExtent, this.sourceZ_);\n\n for (let srcX = sourceRange.minX; srcX <= sourceRange.maxX; srcX++) {\n for (let srcY = sourceRange.minY; srcY <= sourceRange.maxY; srcY++) {\n const tile = getTileFunction(this.sourceZ_, srcX, srcY, pixelRatio);\n if (tile) {\n this.sourceTiles_.push(tile);\n }\n }\n }\n\n if (this.sourceTiles_.length === 0) {\n this.state = TileState.EMPTY;\n }\n }\n};\n\ninherits(ReprojTile, Tile);\n\n\n/**\n * @inheritDoc\n */\nReprojTile.prototype.disposeInternal = function() {\n if (this.state == TileState.LOADING) {\n this.unlistenSources_();\n }\n Tile.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * Get the HTML Canvas element for this tile.\n * @return {HTMLCanvasElement} Canvas.\n */\nReprojTile.prototype.getImage = function() {\n return this.canvas_;\n};\n\n\n/**\n * @private\n */\nReprojTile.prototype.reproject_ = function() {\n const sources = [];\n this.sourceTiles_.forEach(function(tile, i, arr) {\n if (tile && tile.getState() == TileState.LOADED) {\n sources.push({\n extent: this.sourceTileGrid_.getTileCoordExtent(tile.tileCoord),\n image: tile.getImage()\n });\n }\n }.bind(this));\n this.sourceTiles_.length = 0;\n\n if (sources.length === 0) {\n this.state = TileState.ERROR;\n } else {\n const z = this.wrappedTileCoord_[0];\n const size = this.targetTileGrid_.getTileSize(z);\n const width = typeof size === 'number' ? size : size[0];\n const height = typeof size === 'number' ? size : size[1];\n const targetResolution = this.targetTileGrid_.getResolution(z);\n const sourceResolution = this.sourceTileGrid_.getResolution(this.sourceZ_);\n\n const targetExtent = this.targetTileGrid_.getTileCoordExtent(\n this.wrappedTileCoord_);\n this.canvas_ = renderReprojected(width, height, this.pixelRatio_,\n sourceResolution, this.sourceTileGrid_.getExtent(),\n targetResolution, targetExtent, this.triangulation_, sources,\n this.gutter_, this.renderEdges_);\n\n this.state = TileState.LOADED;\n }\n this.changed();\n};\n\n\n/**\n * @inheritDoc\n */\nReprojTile.prototype.load = function() {\n if (this.state == TileState.IDLE) {\n this.state = TileState.LOADING;\n this.changed();\n\n let leftToLoad = 0;\n\n this.sourcesListenerKeys_ = [];\n this.sourceTiles_.forEach(function(tile, i, arr) {\n const state = tile.getState();\n if (state == TileState.IDLE || state == TileState.LOADING) {\n leftToLoad++;\n\n const sourceListenKey = listen(tile, EventType.CHANGE,\n function(e) {\n const state = tile.getState();\n if (state == TileState.LOADED ||\n state == TileState.ERROR ||\n state == TileState.EMPTY) {\n unlistenByKey(sourceListenKey);\n leftToLoad--;\n if (leftToLoad === 0) {\n this.unlistenSources_();\n this.reproject_();\n }\n }\n }, this);\n this.sourcesListenerKeys_.push(sourceListenKey);\n }\n }.bind(this));\n\n this.sourceTiles_.forEach(function(tile, i, arr) {\n const state = tile.getState();\n if (state == TileState.IDLE) {\n tile.load();\n }\n });\n\n if (leftToLoad === 0) {\n setTimeout(this.reproject_.bind(this), 0);\n }\n }\n};\n\n\n/**\n * @private\n */\nReprojTile.prototype.unlistenSources_ = function() {\n this.sourcesListenerKeys_.forEach(unlistenByKey);\n this.sourcesListenerKeys_ = null;\n};\nexport default ReprojTile;\n","/**\n * @module ol/tilegrid/TileGrid\n */\nimport {DEFAULT_TILE_SIZE} from './common.js';\nimport {assert} from '../asserts.js';\nimport TileRange, {createOrUpdate as createOrUpdateTileRange} from '../TileRange.js';\nimport {isSorted, linearFindNearest} from '../array.js';\nimport {createOrUpdate, getTopLeft} from '../extent.js';\nimport {clamp} from '../math.js';\nimport {toSize} from '../size.js';\nimport {createOrUpdate as createOrUpdateTileCoord} from '../tilecoord.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/extent~Extent} [extent] Extent for the tile grid. No tiles outside this\n * extent will be requested by {@link module:ol/source/Tile} sources. When no `origin` or\n * `origins` are configured, the `origin` will be set to the top-left corner of the extent.\n * @property {number} [minZoom=0] Minimum zoom.\n * @property {module:ol/coordinate~Coordinate} [origin] The tile grid origin, i.e. where the `x`\n * and `y` axes meet (`[z, 0, 0]`). Tile coordinates increase left to right and upwards. If not\n * specified, `extent` or `origins` must be provided.\n * @property {Array.<module:ol/coordinate~Coordinate>} [origins] Tile grid origins, i.e. where\n * the `x` and `y` axes meet (`[z, 0, 0]`), for each zoom level. If given, the array length\n * should match the length of the `resolutions` array, i.e. each resolution can have a different\n * origin. Tile coordinates increase left to right and upwards. If not specified, `extent` or\n * `origin` must be provided.\n * @property {!Array.<number>} resolutions Resolutions. The array index of each resolution needs\n * to match the zoom level. This means that even if a `minZoom` is configured, the resolutions\n * array will have a length of `maxZoom + 1`.\n * @property {Array.<module:ol/size~Size>} [sizes] Sizes.\n * @property {number|module:ol/size~Size} [tileSize] Tile size.\n * Default is `[256, 256]`.\n * @property {Array.<module:ol/size~Size>} [tileSizes] Tile sizes. If given, the array length\n * should match the length of the `resolutions` array, i.e. each resolution can have a different\n * tile size.\n */\n\n\n/**\n * @classdesc\n * Base class for setting the grid pattern for sources accessing tiled-image\n * servers.\n *\n * @constructor\n * @param {module:ol/tilegrid/TileGrid~Options} options Tile grid options.\n * @struct\n * @api\n */\nconst TileGrid = function(options) {\n\n /**\n * @protected\n * @type {number}\n */\n this.minZoom = options.minZoom !== undefined ? options.minZoom : 0;\n\n /**\n * @private\n * @type {!Array.<number>}\n */\n this.resolutions_ = options.resolutions;\n assert(isSorted(this.resolutions_, function(a, b) {\n return b - a;\n }, true), 17); // `resolutions` must be sorted in descending order\n\n\n // check if we've got a consistent zoom factor and origin\n let zoomFactor;\n if (!options.origins) {\n for (let i = 0, ii = this.resolutions_.length - 1; i < ii; ++i) {\n if (!zoomFactor) {\n zoomFactor = this.resolutions_[i] / this.resolutions_[i + 1];\n } else {\n if (this.resolutions_[i] / this.resolutions_[i + 1] !== zoomFactor) {\n zoomFactor = undefined;\n break;\n }\n }\n }\n }\n\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.zoomFactor_ = zoomFactor;\n\n\n /**\n * @protected\n * @type {number}\n */\n this.maxZoom = this.resolutions_.length - 1;\n\n /**\n * @private\n * @type {module:ol/coordinate~Coordinate}\n */\n this.origin_ = options.origin !== undefined ? options.origin : null;\n\n /**\n * @private\n * @type {Array.<module:ol/coordinate~Coordinate>}\n */\n this.origins_ = null;\n if (options.origins !== undefined) {\n this.origins_ = options.origins;\n assert(this.origins_.length == this.resolutions_.length,\n 20); // Number of `origins` and `resolutions` must be equal\n }\n\n const extent = options.extent;\n\n if (extent !== undefined &&\n !this.origin_ && !this.origins_) {\n this.origin_ = getTopLeft(extent);\n }\n\n assert(\n (!this.origin_ && this.origins_) || (this.origin_ && !this.origins_),\n 18); // Either `origin` or `origins` must be configured, never both\n\n /**\n * @private\n * @type {Array.<number|module:ol/size~Size>}\n */\n this.tileSizes_ = null;\n if (options.tileSizes !== undefined) {\n this.tileSizes_ = options.tileSizes;\n assert(this.tileSizes_.length == this.resolutions_.length,\n 19); // Number of `tileSizes` and `resolutions` must be equal\n }\n\n /**\n * @private\n * @type {number|module:ol/size~Size}\n */\n this.tileSize_ = options.tileSize !== undefined ?\n options.tileSize :\n !this.tileSizes_ ? DEFAULT_TILE_SIZE : null;\n assert(\n (!this.tileSize_ && this.tileSizes_) ||\n (this.tileSize_ && !this.tileSizes_),\n 22); // Either `tileSize` or `tileSizes` must be configured, never both\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.extent_ = extent !== undefined ? extent : null;\n\n\n /**\n * @private\n * @type {Array.<module:ol/TileRange>}\n */\n this.fullTileRanges_ = null;\n\n /**\n * @private\n * @type {module:ol/size~Size}\n */\n this.tmpSize_ = [0, 0];\n\n if (options.sizes !== undefined) {\n this.fullTileRanges_ = options.sizes.map(function(size, z) {\n const tileRange = new TileRange(\n Math.min(0, size[0]), Math.max(size[0] - 1, -1),\n Math.min(0, size[1]), Math.max(size[1] - 1, -1));\n return tileRange;\n }, this);\n } else if (extent) {\n this.calculateTileRanges_(extent);\n }\n\n};\n\n\n/**\n * @private\n * @type {module:ol/tilecoord~TileCoord}\n */\nconst tmpTileCoord = [0, 0, 0];\n\n\n/**\n * Call a function with each tile coordinate for a given extent and zoom level.\n *\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} zoom Integer zoom level.\n * @param {function(module:ol/tilecoord~TileCoord)} callback Function called with each tile coordinate.\n * @api\n */\nTileGrid.prototype.forEachTileCoord = function(extent, zoom, callback) {\n const tileRange = this.getTileRangeForExtentAndZ(extent, zoom);\n for (let i = tileRange.minX, ii = tileRange.maxX; i <= ii; ++i) {\n for (let j = tileRange.minY, jj = tileRange.maxY; j <= jj; ++j) {\n callback([zoom, i, j]);\n }\n }\n};\n\n\n/**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {function(this: T, number, module:ol/TileRange): boolean} callback Callback.\n * @param {T=} opt_this The object to use as `this` in `callback`.\n * @param {module:ol/TileRange=} opt_tileRange Temporary module:ol/TileRange object.\n * @param {module:ol/extent~Extent=} opt_extent Temporary module:ol/extent~Extent object.\n * @return {boolean} Callback succeeded.\n * @template T\n */\nTileGrid.prototype.forEachTileCoordParentTileRange = function(tileCoord, callback, opt_this, opt_tileRange, opt_extent) {\n let tileRange, x, y;\n let tileCoordExtent = null;\n let z = tileCoord[0] - 1;\n if (this.zoomFactor_ === 2) {\n x = tileCoord[1];\n y = tileCoord[2];\n } else {\n tileCoordExtent = this.getTileCoordExtent(tileCoord, opt_extent);\n }\n while (z >= this.minZoom) {\n if (this.zoomFactor_ === 2) {\n x = Math.floor(x / 2);\n y = Math.floor(y / 2);\n tileRange = createOrUpdateTileRange(x, x, y, y, opt_tileRange);\n } else {\n tileRange = this.getTileRangeForExtentAndZ(tileCoordExtent, z, opt_tileRange);\n }\n if (callback.call(opt_this, z, tileRange)) {\n return true;\n }\n --z;\n }\n return false;\n};\n\n\n/**\n * Get the extent for this tile grid, if it was configured.\n * @return {module:ol/extent~Extent} Extent.\n */\nTileGrid.prototype.getExtent = function() {\n return this.extent_;\n};\n\n\n/**\n * Get the maximum zoom level for the grid.\n * @return {number} Max zoom.\n * @api\n */\nTileGrid.prototype.getMaxZoom = function() {\n return this.maxZoom;\n};\n\n\n/**\n * Get the minimum zoom level for the grid.\n * @return {number} Min zoom.\n * @api\n */\nTileGrid.prototype.getMinZoom = function() {\n return this.minZoom;\n};\n\n\n/**\n * Get the origin for the grid at the given zoom level.\n * @param {number} z Integer zoom level.\n * @return {module:ol/coordinate~Coordinate} Origin.\n * @api\n */\nTileGrid.prototype.getOrigin = function(z) {\n if (this.origin_) {\n return this.origin_;\n } else {\n return this.origins_[z];\n }\n};\n\n\n/**\n * Get the resolution for the given zoom level.\n * @param {number} z Integer zoom level.\n * @return {number} Resolution.\n * @api\n */\nTileGrid.prototype.getResolution = function(z) {\n return this.resolutions_[z];\n};\n\n\n/**\n * Get the list of resolutions for the tile grid.\n * @return {Array.<number>} Resolutions.\n * @api\n */\nTileGrid.prototype.getResolutions = function() {\n return this.resolutions_;\n};\n\n\n/**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {module:ol/TileRange=} opt_tileRange Temporary module:ol/TileRange object.\n * @param {module:ol/extent~Extent=} opt_extent Temporary module:ol/extent~Extent object.\n * @return {module:ol/TileRange} Tile range.\n */\nTileGrid.prototype.getTileCoordChildTileRange = function(tileCoord, opt_tileRange, opt_extent) {\n if (tileCoord[0] < this.maxZoom) {\n if (this.zoomFactor_ === 2) {\n const minX = tileCoord[1] * 2;\n const minY = tileCoord[2] * 2;\n return createOrUpdateTileRange(minX, minX + 1, minY, minY + 1, opt_tileRange);\n }\n const tileCoordExtent = this.getTileCoordExtent(tileCoord, opt_extent);\n return this.getTileRangeForExtentAndZ(\n tileCoordExtent, tileCoord[0] + 1, opt_tileRange);\n }\n return null;\n};\n\n\n/**\n * Get the extent for a tile range.\n * @param {number} z Integer zoom level.\n * @param {module:ol/TileRange} tileRange Tile range.\n * @param {module:ol/extent~Extent=} opt_extent Temporary module:ol/extent~Extent object.\n * @return {module:ol/extent~Extent} Extent.\n */\nTileGrid.prototype.getTileRangeExtent = function(z, tileRange, opt_extent) {\n const origin = this.getOrigin(z);\n const resolution = this.getResolution(z);\n const tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n const minX = origin[0] + tileRange.minX * tileSize[0] * resolution;\n const maxX = origin[0] + (tileRange.maxX + 1) * tileSize[0] * resolution;\n const minY = origin[1] + tileRange.minY * tileSize[1] * resolution;\n const maxY = origin[1] + (tileRange.maxY + 1) * tileSize[1] * resolution;\n return createOrUpdate(minX, minY, maxX, maxY, opt_extent);\n};\n\n\n/**\n * Get a tile range for the given extent and integer zoom level.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} z Integer zoom level.\n * @param {module:ol/TileRange=} opt_tileRange Temporary tile range object.\n * @return {module:ol/TileRange} Tile range.\n */\nTileGrid.prototype.getTileRangeForExtentAndZ = function(extent, z, opt_tileRange) {\n const tileCoord = tmpTileCoord;\n this.getTileCoordForXYAndZ_(extent[0], extent[1], z, false, tileCoord);\n const minX = tileCoord[1];\n const minY = tileCoord[2];\n this.getTileCoordForXYAndZ_(extent[2], extent[3], z, true, tileCoord);\n return createOrUpdateTileRange(minX, tileCoord[1], minY, tileCoord[2], opt_tileRange);\n};\n\n\n/**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @return {module:ol/coordinate~Coordinate} Tile center.\n */\nTileGrid.prototype.getTileCoordCenter = function(tileCoord) {\n const origin = this.getOrigin(tileCoord[0]);\n const resolution = this.getResolution(tileCoord[0]);\n const tileSize = toSize(this.getTileSize(tileCoord[0]), this.tmpSize_);\n return [\n origin[0] + (tileCoord[1] + 0.5) * tileSize[0] * resolution,\n origin[1] + (tileCoord[2] + 0.5) * tileSize[1] * resolution\n ];\n};\n\n\n/**\n * Get the extent of a tile coordinate.\n *\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {module:ol/extent~Extent=} opt_extent Temporary extent object.\n * @return {module:ol/extent~Extent} Extent.\n * @api\n */\nTileGrid.prototype.getTileCoordExtent = function(tileCoord, opt_extent) {\n const origin = this.getOrigin(tileCoord[0]);\n const resolution = this.getResolution(tileCoord[0]);\n const tileSize = toSize(this.getTileSize(tileCoord[0]), this.tmpSize_);\n const minX = origin[0] + tileCoord[1] * tileSize[0] * resolution;\n const minY = origin[1] + tileCoord[2] * tileSize[1] * resolution;\n const maxX = minX + tileSize[0] * resolution;\n const maxY = minY + tileSize[1] * resolution;\n return createOrUpdate(minX, minY, maxX, maxY, opt_extent);\n};\n\n\n/**\n * Get the tile coordinate for the given map coordinate and resolution. This\n * method considers that coordinates that intersect tile boundaries should be\n * assigned the higher tile coordinate.\n *\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {number} resolution Resolution.\n * @param {module:ol/tilecoord~TileCoord=} opt_tileCoord Destination module:ol/tilecoord~TileCoord object.\n * @return {module:ol/tilecoord~TileCoord} Tile coordinate.\n * @api\n */\nTileGrid.prototype.getTileCoordForCoordAndResolution = function(coordinate, resolution, opt_tileCoord) {\n return this.getTileCoordForXYAndResolution_(\n coordinate[0], coordinate[1], resolution, false, opt_tileCoord);\n};\n\n\n/**\n * Note that this method should not be called for resolutions that correspond\n * to an integer zoom level. Instead call the `getTileCoordForXYAndZ_` method.\n * @param {number} x X.\n * @param {number} y Y.\n * @param {number} resolution Resolution (for a non-integer zoom level).\n * @param {boolean} reverseIntersectionPolicy Instead of letting edge\n * intersections go to the higher tile coordinate, let edge intersections\n * go to the lower tile coordinate.\n * @param {module:ol/tilecoord~TileCoord=} opt_tileCoord Temporary module:ol/tilecoord~TileCoord object.\n * @return {module:ol/tilecoord~TileCoord} Tile coordinate.\n * @private\n */\nTileGrid.prototype.getTileCoordForXYAndResolution_ = function(\n x, y, resolution, reverseIntersectionPolicy, opt_tileCoord) {\n const z = this.getZForResolution(resolution);\n const scale = resolution / this.getResolution(z);\n const origin = this.getOrigin(z);\n const tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n\n const adjustX = reverseIntersectionPolicy ? 0.5 : 0;\n const adjustY = reverseIntersectionPolicy ? 0 : 0.5;\n const xFromOrigin = Math.floor((x - origin[0]) / resolution + adjustX);\n const yFromOrigin = Math.floor((y - origin[1]) / resolution + adjustY);\n let tileCoordX = scale * xFromOrigin / tileSize[0];\n let tileCoordY = scale * yFromOrigin / tileSize[1];\n\n if (reverseIntersectionPolicy) {\n tileCoordX = Math.ceil(tileCoordX) - 1;\n tileCoordY = Math.ceil(tileCoordY) - 1;\n } else {\n tileCoordX = Math.floor(tileCoordX);\n tileCoordY = Math.floor(tileCoordY);\n }\n\n return createOrUpdateTileCoord(z, tileCoordX, tileCoordY, opt_tileCoord);\n};\n\n\n/**\n * Although there is repetition between this method and `getTileCoordForXYAndResolution_`,\n * they should have separate implementations. This method is for integer zoom\n * levels. The other method should only be called for resolutions corresponding\n * to non-integer zoom levels.\n * @param {number} x Map x coordinate.\n * @param {number} y Map y coordinate.\n * @param {number} z Integer zoom level.\n * @param {boolean} reverseIntersectionPolicy Instead of letting edge\n * intersections go to the higher tile coordinate, let edge intersections\n * go to the lower tile coordinate.\n * @param {module:ol/tilecoord~TileCoord=} opt_tileCoord Temporary module:ol/tilecoord~TileCoord object.\n * @return {module:ol/tilecoord~TileCoord} Tile coordinate.\n * @private\n */\nTileGrid.prototype.getTileCoordForXYAndZ_ = function(x, y, z, reverseIntersectionPolicy, opt_tileCoord) {\n const origin = this.getOrigin(z);\n const resolution = this.getResolution(z);\n const tileSize = toSize(this.getTileSize(z), this.tmpSize_);\n\n const adjustX = reverseIntersectionPolicy ? 0.5 : 0;\n const adjustY = reverseIntersectionPolicy ? 0 : 0.5;\n const xFromOrigin = Math.floor((x - origin[0]) / resolution + adjustX);\n const yFromOrigin = Math.floor((y - origin[1]) / resolution + adjustY);\n let tileCoordX = xFromOrigin / tileSize[0];\n let tileCoordY = yFromOrigin / tileSize[1];\n\n if (reverseIntersectionPolicy) {\n tileCoordX = Math.ceil(tileCoordX) - 1;\n tileCoordY = Math.ceil(tileCoordY) - 1;\n } else {\n tileCoordX = Math.floor(tileCoordX);\n tileCoordY = Math.floor(tileCoordY);\n }\n\n return createOrUpdateTileCoord(z, tileCoordX, tileCoordY, opt_tileCoord);\n};\n\n\n/**\n * Get a tile coordinate given a map coordinate and zoom level.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {number} z Zoom level.\n * @param {module:ol/tilecoord~TileCoord=} opt_tileCoord Destination module:ol/tilecoord~TileCoord object.\n * @return {module:ol/tilecoord~TileCoord} Tile coordinate.\n * @api\n */\nTileGrid.prototype.getTileCoordForCoordAndZ = function(coordinate, z, opt_tileCoord) {\n return this.getTileCoordForXYAndZ_(\n coordinate[0], coordinate[1], z, false, opt_tileCoord);\n};\n\n\n/**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @return {number} Tile resolution.\n */\nTileGrid.prototype.getTileCoordResolution = function(tileCoord) {\n return this.resolutions_[tileCoord[0]];\n};\n\n\n/**\n * Get the tile size for a zoom level. The type of the return value matches the\n * `tileSize` or `tileSizes` that the tile grid was configured with. To always\n * get an `module:ol/size~Size`, run the result through `module:ol/size~Size.toSize()`.\n * @param {number} z Z.\n * @return {number|module:ol/size~Size} Tile size.\n * @api\n */\nTileGrid.prototype.getTileSize = function(z) {\n if (this.tileSize_) {\n return this.tileSize_;\n } else {\n return this.tileSizes_[z];\n }\n};\n\n\n/**\n * @param {number} z Zoom level.\n * @return {module:ol/TileRange} Extent tile range for the specified zoom level.\n */\nTileGrid.prototype.getFullTileRange = function(z) {\n if (!this.fullTileRanges_) {\n return null;\n } else {\n return this.fullTileRanges_[z];\n }\n};\n\n\n/**\n * @param {number} resolution Resolution.\n * @param {number=} opt_direction If 0, the nearest resolution will be used.\n * If 1, the nearest lower resolution will be used. If -1, the nearest\n * higher resolution will be used. Default is 0.\n * @return {number} Z.\n * @api\n */\nTileGrid.prototype.getZForResolution = function(resolution, opt_direction) {\n const z = linearFindNearest(this.resolutions_, resolution, opt_direction || 0);\n return clamp(z, this.minZoom, this.maxZoom);\n};\n\n\n/**\n * @param {!module:ol/extent~Extent} extent Extent for this tile grid.\n * @private\n */\nTileGrid.prototype.calculateTileRanges_ = function(extent) {\n const length = this.resolutions_.length;\n const fullTileRanges = new Array(length);\n for (let z = this.minZoom; z < length; ++z) {\n fullTileRanges[z] = this.getTileRangeForExtentAndZ(extent, z);\n }\n this.fullTileRanges_ = fullTileRanges;\n};\nexport default TileGrid;\n","/**\n * @module ol/tilegrid\n */\nimport {DEFAULT_MAX_ZOOM, DEFAULT_TILE_SIZE} from './tilegrid/common.js';\nimport {toSize} from './size.js';\nimport {containsCoordinate, createOrUpdate, getCorner, getHeight, getWidth} from './extent.js';\nimport Corner from './extent/Corner.js';\nimport {assign} from './obj.js';\nimport {get as getProjection, METERS_PER_UNIT} from './proj.js';\nimport Units from './proj/Units.js';\nimport TileGrid from './tilegrid/TileGrid.js';\n\n\n/**\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {!module:ol/tilegrid/TileGrid} Default tile grid for the\n * passed projection.\n */\nexport function getForProjection(projection) {\n let tileGrid = projection.getDefaultTileGrid();\n if (!tileGrid) {\n tileGrid = createForProjection(projection);\n projection.setDefaultTileGrid(tileGrid);\n }\n return tileGrid;\n}\n\n\n/**\n * @param {module:ol/tilegrid/TileGrid} tileGrid Tile grid.\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {module:ol/tilecoord~TileCoord} Tile coordinate.\n */\nexport function wrapX(tileGrid, tileCoord, projection) {\n const z = tileCoord[0];\n const center = tileGrid.getTileCoordCenter(tileCoord);\n const projectionExtent = extentFromProjection(projection);\n if (!containsCoordinate(projectionExtent, center)) {\n const worldWidth = getWidth(projectionExtent);\n const worldsAway = Math.ceil((projectionExtent[0] - center[0]) / worldWidth);\n center[0] += worldWidth * worldsAway;\n return tileGrid.getTileCoordForCoordAndZ(center, z);\n } else {\n return tileCoord;\n }\n}\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number=} opt_maxZoom Maximum zoom level (default is\n * DEFAULT_MAX_ZOOM).\n * @param {number|module:ol/size~Size=} opt_tileSize Tile size (default uses\n * DEFAULT_TILE_SIZE).\n * @param {module:ol/extent/Corner=} opt_corner Extent corner (default is `'top-left'`).\n * @return {!module:ol/tilegrid/TileGrid} TileGrid instance.\n */\nexport function createForExtent(extent, opt_maxZoom, opt_tileSize, opt_corner) {\n const corner = opt_corner !== undefined ? opt_corner : Corner.TOP_LEFT;\n\n const resolutions = resolutionsFromExtent(extent, opt_maxZoom, opt_tileSize);\n\n return new TileGrid({\n extent: extent,\n origin: getCorner(extent, corner),\n resolutions: resolutions,\n tileSize: opt_tileSize\n });\n}\n\n\n/**\n * @typedef {Object} XYZOptions\n * @property {module:ol/extent~Extent} [extent] Extent for the tile grid. The origin for an XYZ tile grid is the\n * top-left corner of the extent. The zero level of the grid is defined by the resolution at which one tile fits in the\n * provided extent. If not provided, the extent of the EPSG:3857 projection is used.\n * @property {number} [maxZoom] Maximum zoom. The default is `42`. This determines the number of levels\n * in the grid set. For example, a `maxZoom` of 21 means there are 22 levels in the grid set.\n * @property {number} [minZoom=0] Minimum zoom.\n * @property {number|module:ol/size~Size} [tileSize=[256, 256]] Tile size in pixels.\n */\n\n\n/**\n * Creates a tile grid with a standard XYZ tiling scheme.\n * @param {module:ol/tilegrid~XYZOptions=} opt_options Tile grid options.\n * @return {!module:ol/tilegrid/TileGrid} Tile grid instance.\n * @api\n */\nexport function createXYZ(opt_options) {\n const options = /** @type {module:ol/tilegrid/TileGrid~Options} */ ({});\n assign(options, opt_options !== undefined ?\n opt_options : /** @type {module:ol/tilegrid~XYZOptions} */ ({}));\n if (options.extent === undefined) {\n options.extent = getProjection('EPSG:3857').getExtent();\n }\n options.resolutions = resolutionsFromExtent(\n options.extent, options.maxZoom, options.tileSize);\n delete options.maxZoom;\n\n return new TileGrid(options);\n}\n\n\n/**\n * Create a resolutions array from an extent. A zoom factor of 2 is assumed.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number=} opt_maxZoom Maximum zoom level (default is\n * DEFAULT_MAX_ZOOM).\n * @param {number|module:ol/size~Size=} opt_tileSize Tile size (default uses\n * DEFAULT_TILE_SIZE).\n * @return {!Array.<number>} Resolutions array.\n */\nfunction resolutionsFromExtent(extent, opt_maxZoom, opt_tileSize) {\n const maxZoom = opt_maxZoom !== undefined ?\n opt_maxZoom : DEFAULT_MAX_ZOOM;\n\n const height = getHeight(extent);\n const width = getWidth(extent);\n\n const tileSize = toSize(opt_tileSize !== undefined ?\n opt_tileSize : DEFAULT_TILE_SIZE);\n const maxResolution = Math.max(\n width / tileSize[0], height / tileSize[1]);\n\n const length = maxZoom + 1;\n const resolutions = new Array(length);\n for (let z = 0; z < length; ++z) {\n resolutions[z] = maxResolution / Math.pow(2, z);\n }\n return resolutions;\n}\n\n\n/**\n * @param {module:ol/proj~ProjectionLike} projection Projection.\n * @param {number=} opt_maxZoom Maximum zoom level (default is\n * DEFAULT_MAX_ZOOM).\n * @param {number|module:ol/size~Size=} opt_tileSize Tile size (default uses\n * DEFAULT_TILE_SIZE).\n * @param {module:ol/extent/Corner=} opt_corner Extent corner (default is `'top-left'`).\n * @return {!module:ol/tilegrid/TileGrid} TileGrid instance.\n */\nexport function createForProjection(projection, opt_maxZoom, opt_tileSize, opt_corner) {\n const extent = extentFromProjection(projection);\n return createForExtent(extent, opt_maxZoom, opt_tileSize, opt_corner);\n}\n\n\n/**\n * Generate a tile grid extent from a projection. If the projection has an\n * extent, it is used. If not, a global extent is assumed.\n * @param {module:ol/proj~ProjectionLike} projection Projection.\n * @return {module:ol/extent~Extent} Extent.\n */\nexport function extentFromProjection(projection) {\n projection = getProjection(projection);\n let extent = projection.getExtent();\n if (!extent) {\n const half = 180 * METERS_PER_UNIT[Units.DEGREES] / projection.getMetersPerUnit();\n extent = createOrUpdate(-half, -half, half, half);\n }\n return extent;\n}\n","/**\n * @module ol/source/Tile\n */\nimport {inherits} from '../util.js';\nimport {UNDEFINED} from '../functions.js';\nimport TileCache from '../TileCache.js';\nimport TileState from '../TileState.js';\nimport Event from '../events/Event.js';\nimport {equivalent} from '../proj.js';\nimport {toSize, scale as scaleSize} from '../size.js';\nimport Source from '../source/Source.js';\nimport {getKeyZXY, withinExtentAndZ} from '../tilecoord.js';\nimport {wrapX, getForProjection as getTileGridForProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions]\n * @property {number} [cacheSize]\n * @property {module:ol/extent~Extent} [extent]\n * @property {boolean} [opaque]\n * @property {number} [tilePixelRatio]\n * @property {module:ol/proj~ProjectionLike} [projection]\n * @property {module:ol/source/State} [state]\n * @property {module:ol/tilegrid/TileGrid} [tileGrid]\n * @property {boolean} [wrapX=true]\n * @property {number} [transition]\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for sources providing images divided into a tile grid.\n *\n * @constructor\n * @abstract\n * @extends {module:ol/source/Source}\n * @param {module:ol/source/Tile~Options=} options SourceTile source options.\n * @api\n */\nconst TileSource = function(options) {\n\n Source.call(this, {\n attributions: options.attributions,\n extent: options.extent,\n projection: options.projection,\n state: options.state,\n wrapX: options.wrapX\n });\n\n /**\n * @private\n * @type {boolean}\n */\n this.opaque_ = options.opaque !== undefined ? options.opaque : false;\n\n /**\n * @private\n * @type {number}\n */\n this.tilePixelRatio_ = options.tilePixelRatio !== undefined ?\n options.tilePixelRatio : 1;\n\n /**\n * @protected\n * @type {module:ol/tilegrid/TileGrid}\n */\n this.tileGrid = options.tileGrid !== undefined ? options.tileGrid : null;\n\n /**\n * @protected\n * @type {module:ol/TileCache}\n */\n this.tileCache = new TileCache(options.cacheSize);\n\n /**\n * @protected\n * @type {module:ol/size~Size}\n */\n this.tmpSize = [0, 0];\n\n /**\n * @private\n * @type {string}\n */\n this.key_ = '';\n\n /**\n * @protected\n * @type {module:ol/Tile~Options}\n */\n this.tileOptions = {transition: options.transition};\n\n};\n\ninherits(TileSource, Source);\n\n\n/**\n * @return {boolean} Can expire cache.\n */\nTileSource.prototype.canExpireCache = function() {\n return this.tileCache.canExpireCache();\n};\n\n\n/**\n * @param {module:ol/proj/Projection} projection Projection.\n * @param {!Object.<string, module:ol/TileRange>} usedTiles Used tiles.\n */\nTileSource.prototype.expireCache = function(projection, usedTiles) {\n const tileCache = this.getTileCacheForProjection(projection);\n if (tileCache) {\n tileCache.expireCache(usedTiles);\n }\n};\n\n\n/**\n * @param {module:ol/proj/Projection} projection Projection.\n * @param {number} z Zoom level.\n * @param {module:ol/TileRange} tileRange Tile range.\n * @param {function(module:ol/Tile):(boolean|undefined)} callback Called with each\n * loaded tile. If the callback returns `false`, the tile will not be\n * considered loaded.\n * @return {boolean} The tile range is fully covered with loaded tiles.\n */\nTileSource.prototype.forEachLoadedTile = function(projection, z, tileRange, callback) {\n const tileCache = this.getTileCacheForProjection(projection);\n if (!tileCache) {\n return false;\n }\n\n let covered = true;\n let tile, tileCoordKey, loaded;\n for (let x = tileRange.minX; x <= tileRange.maxX; ++x) {\n for (let y = tileRange.minY; y <= tileRange.maxY; ++y) {\n tileCoordKey = getKeyZXY(z, x, y);\n loaded = false;\n if (tileCache.containsKey(tileCoordKey)) {\n tile = /** @type {!module:ol/Tile} */ (tileCache.get(tileCoordKey));\n loaded = tile.getState() === TileState.LOADED;\n if (loaded) {\n loaded = (callback(tile) !== false);\n }\n }\n if (!loaded) {\n covered = false;\n }\n }\n }\n return covered;\n};\n\n\n/**\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {number} Gutter.\n */\nTileSource.prototype.getGutter = function(projection) {\n return 0;\n};\n\n\n/**\n * Return the key to be used for all tiles in the source.\n * @return {string} The key for all tiles.\n * @protected\n */\nTileSource.prototype.getKey = function() {\n return this.key_;\n};\n\n\n/**\n * Set the value to be used as the key for all tiles in the source.\n * @param {string} key The key for tiles.\n * @protected\n */\nTileSource.prototype.setKey = function(key) {\n if (this.key_ !== key) {\n this.key_ = key;\n this.changed();\n }\n};\n\n\n/**\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {boolean} Opaque.\n */\nTileSource.prototype.getOpaque = function(projection) {\n return this.opaque_;\n};\n\n\n/**\n * @inheritDoc\n */\nTileSource.prototype.getResolutions = function() {\n return this.tileGrid.getResolutions();\n};\n\n\n/**\n * @abstract\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {!module:ol/Tile} Tile.\n */\nTileSource.prototype.getTile = function(z, x, y, pixelRatio, projection) {};\n\n\n/**\n * Return the tile grid of the tile source.\n * @return {module:ol/tilegrid/TileGrid} Tile grid.\n * @api\n */\nTileSource.prototype.getTileGrid = function() {\n return this.tileGrid;\n};\n\n\n/**\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {!module:ol/tilegrid/TileGrid} Tile grid.\n */\nTileSource.prototype.getTileGridForProjection = function(projection) {\n if (!this.tileGrid) {\n return getTileGridForProjection(projection);\n } else {\n return this.tileGrid;\n }\n};\n\n\n/**\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {module:ol/TileCache} Tile cache.\n * @protected\n */\nTileSource.prototype.getTileCacheForProjection = function(projection) {\n const thisProj = this.getProjection();\n if (thisProj && !equivalent(thisProj, projection)) {\n return null;\n } else {\n return this.tileCache;\n }\n};\n\n\n/**\n * Get the tile pixel ratio for this source. Subclasses may override this\n * method, which is meant to return a supported pixel ratio that matches the\n * provided `pixelRatio` as close as possible.\n * @param {number} pixelRatio Pixel ratio.\n * @return {number} Tile pixel ratio.\n */\nTileSource.prototype.getTilePixelRatio = function(pixelRatio) {\n return this.tilePixelRatio_;\n};\n\n\n/**\n * @param {number} z Z.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {module:ol/size~Size} Tile size.\n */\nTileSource.prototype.getTilePixelSize = function(z, pixelRatio, projection) {\n const tileGrid = this.getTileGridForProjection(projection);\n const tilePixelRatio = this.getTilePixelRatio(pixelRatio);\n const tileSize = toSize(tileGrid.getTileSize(z), this.tmpSize);\n if (tilePixelRatio == 1) {\n return tileSize;\n } else {\n return scaleSize(tileSize, tilePixelRatio, this.tmpSize);\n }\n};\n\n\n/**\n * Returns a tile coordinate wrapped around the x-axis. When the tile coordinate\n * is outside the resolution and extent range of the tile grid, `null` will be\n * returned.\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {module:ol/proj/Projection=} opt_projection Projection.\n * @return {module:ol/tilecoord~TileCoord} Tile coordinate to be passed to the tileUrlFunction or\n * null if no tile URL should be created for the passed `tileCoord`.\n */\nTileSource.prototype.getTileCoordForTileUrlFunction = function(tileCoord, opt_projection) {\n const projection = opt_projection !== undefined ?\n opt_projection : this.getProjection();\n const tileGrid = this.getTileGridForProjection(projection);\n if (this.getWrapX() && projection.isGlobal()) {\n tileCoord = wrapX(tileGrid, tileCoord, projection);\n }\n return withinExtentAndZ(tileCoord, tileGrid) ? tileCoord : null;\n};\n\n\n/**\n * @inheritDoc\n */\nTileSource.prototype.refresh = function() {\n this.tileCache.clear();\n this.changed();\n};\n\n\n/**\n * Marks a tile coord as being used, without triggering a load.\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {module:ol/proj/Projection} projection Projection.\n */\nTileSource.prototype.useTile = UNDEFINED;\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Tile~TileSource} instances are instances of this\n * type.\n *\n * @constructor\n * @extends {module:ol/events/Event}\n * @param {string} type Type.\n * @param {module:ol/Tile} tile The tile.\n */\nexport const TileSourceEvent = function(type, tile) {\n\n Event.call(this, type);\n\n /**\n * The tile related to the event.\n * @type {module:ol/Tile}\n * @api\n */\n this.tile = tile;\n\n};\ninherits(TileSourceEvent, Event);\n\nexport default TileSource;\n","/**\n * @module ol/source/TileEventType\n */\n\n/**\n * @enum {string}\n */\nexport default {\n\n /**\n * Triggered when a tile starts loading.\n * @event module:ol/source/Tile~TileSourceEvent#tileloadstart\n * @api\n */\n TILELOADSTART: 'tileloadstart',\n\n /**\n * Triggered when a tile finishes loading, either when its data is loaded,\n * or when loading was aborted because the tile is no longer needed.\n * @event module:ol/source/Tile~TileSourceEvent#tileloadend\n * @api\n */\n TILELOADEND: 'tileloadend',\n\n /**\n * Triggered if tile loading results in an error.\n * @event module:ol/source/Tile~TileSourceEvent#tileloaderror\n * @api\n */\n TILELOADERROR: 'tileloaderror'\n\n};\n","/**\n * @module ol/source/UrlTile\n */\nimport {getUid, inherits} from '../util.js';\nimport TileState from '../TileState.js';\nimport {expandUrl, createFromTemplates, nullTileUrlFunction} from '../tileurlfunction.js';\nimport TileSource, {TileSourceEvent} from '../source/Tile.js';\nimport TileEventType from '../source/TileEventType.js';\nimport {getKeyZXY} from '../tilecoord.js';\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions]\n * @property {number} [cacheSize]\n * @property {module:ol/extent~Extent} [extent]\n * @property {boolean} [opaque]\n * @property {module:ol/proj~ProjectionLike} [projection]\n * @property {module:ol/source/State} [state]\n * @property {module:ol/tilegrid/TileGrid} [tileGrid]\n * @property {module:ol/Tile~LoadFunction} tileLoadFunction\n * @property {number} [tilePixelRatio]\n * @property {module:ol/Tile~UrlFunction} [tileUrlFunction]\n * @property {string} [url]\n * @property {Array.<string>} [urls]\n * @property {boolean} [wrapX=true]\n * @property {number} [transition]\n */\n\n\n/**\n * @classdesc\n * Base class for sources providing tiles divided into a tile grid over http.\n *\n * @constructor\n * @abstract\n * @fires module:ol/source/TileEvent\n * @extends {module:ol/source/Tile}\n * @param {module:ol/source/UrlTile~Options=} options Image tile options.\n */\nconst UrlTile = function(options) {\n\n TileSource.call(this, {\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n extent: options.extent,\n opaque: options.opaque,\n projection: options.projection,\n state: options.state,\n tileGrid: options.tileGrid,\n tilePixelRatio: options.tilePixelRatio,\n wrapX: options.wrapX,\n transition: options.transition\n });\n\n /**\n * @protected\n * @type {module:ol/Tile~LoadFunction}\n */\n this.tileLoadFunction = options.tileLoadFunction;\n\n /**\n * @protected\n * @type {module:ol/Tile~UrlFunction}\n */\n this.tileUrlFunction = this.fixedTileUrlFunction ?\n this.fixedTileUrlFunction.bind(this) : nullTileUrlFunction;\n\n /**\n * @protected\n * @type {!Array.<string>|null}\n */\n this.urls = null;\n\n if (options.urls) {\n this.setUrls(options.urls);\n } else if (options.url) {\n this.setUrl(options.url);\n }\n if (options.tileUrlFunction) {\n this.setTileUrlFunction(options.tileUrlFunction);\n }\n\n /**\n * @private\n * @type {!Object.<number, boolean>}\n */\n this.tileLoadingKeys_ = {};\n\n};\n\ninherits(UrlTile, TileSource);\n\n\n/**\n * @type {module:ol/Tile~UrlFunction|undefined}\n * @protected\n */\nUrlTile.prototype.fixedTileUrlFunction;\n\n/**\n * Return the tile load function of the source.\n * @return {module:ol/Tile~LoadFunction} TileLoadFunction\n * @api\n */\nUrlTile.prototype.getTileLoadFunction = function() {\n return this.tileLoadFunction;\n};\n\n\n/**\n * Return the tile URL function of the source.\n * @return {module:ol/Tile~UrlFunction} TileUrlFunction\n * @api\n */\nUrlTile.prototype.getTileUrlFunction = function() {\n return this.tileUrlFunction;\n};\n\n\n/**\n * Return the URLs used for this source.\n * When a tileUrlFunction is used instead of url or urls,\n * null will be returned.\n * @return {!Array.<string>|null} URLs.\n * @api\n */\nUrlTile.prototype.getUrls = function() {\n return this.urls;\n};\n\n\n/**\n * Handle tile change events.\n * @param {module:ol/events/Event} event Event.\n * @protected\n */\nUrlTile.prototype.handleTileChange = function(event) {\n const tile = /** @type {module:ol/Tile} */ (event.target);\n const uid = getUid(tile);\n const tileState = tile.getState();\n let type;\n if (tileState == TileState.LOADING) {\n this.tileLoadingKeys_[uid] = true;\n type = TileEventType.TILELOADSTART;\n } else if (uid in this.tileLoadingKeys_) {\n delete this.tileLoadingKeys_[uid];\n type = tileState == TileState.ERROR ? TileEventType.TILELOADERROR :\n (tileState == TileState.LOADED || tileState == TileState.ABORT) ?\n TileEventType.TILELOADEND : undefined;\n }\n if (type != undefined) {\n this.dispatchEvent(new TileSourceEvent(type, tile));\n }\n};\n\n\n/**\n * Set the tile load function of the source.\n * @param {module:ol/Tile~LoadFunction} tileLoadFunction Tile load function.\n * @api\n */\nUrlTile.prototype.setTileLoadFunction = function(tileLoadFunction) {\n this.tileCache.clear();\n this.tileLoadFunction = tileLoadFunction;\n this.changed();\n};\n\n\n/**\n * Set the tile URL function of the source.\n * @param {module:ol/Tile~UrlFunction} tileUrlFunction Tile URL function.\n * @param {string=} opt_key Optional new tile key for the source.\n * @api\n */\nUrlTile.prototype.setTileUrlFunction = function(tileUrlFunction, opt_key) {\n this.tileUrlFunction = tileUrlFunction;\n this.tileCache.pruneExceptNewestZ();\n if (typeof opt_key !== 'undefined') {\n this.setKey(opt_key);\n } else {\n this.changed();\n }\n};\n\n\n/**\n * Set the URL to use for requests.\n * @param {string} url URL.\n * @api\n */\nUrlTile.prototype.setUrl = function(url) {\n const urls = this.urls = expandUrl(url);\n this.setTileUrlFunction(this.fixedTileUrlFunction ?\n this.fixedTileUrlFunction.bind(this) :\n createFromTemplates(urls, this.tileGrid), url);\n};\n\n\n/**\n * Set the URLs to use for requests.\n * @param {Array.<string>} urls URLs.\n * @api\n */\nUrlTile.prototype.setUrls = function(urls) {\n this.urls = urls;\n const key = urls.join('\\n');\n this.setTileUrlFunction(this.fixedTileUrlFunction ?\n this.fixedTileUrlFunction.bind(this) :\n createFromTemplates(urls, this.tileGrid), key);\n};\n\n\n/**\n * @inheritDoc\n */\nUrlTile.prototype.useTile = function(z, x, y) {\n const tileCoordKey = getKeyZXY(z, x, y);\n if (this.tileCache.containsKey(tileCoordKey)) {\n this.tileCache.get(tileCoordKey);\n }\n};\nexport default UrlTile;\n","/**\n * @module ol/source/TileImage\n */\nimport {ENABLE_RASTER_REPROJECTION} from '../reproj/common.js';\nimport {getUid, inherits} from '../util.js';\nimport ImageTile from '../ImageTile.js';\nimport TileCache from '../TileCache.js';\nimport TileState from '../TileState.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {equivalent, get as getProjection} from '../proj.js';\nimport ReprojTile from '../reproj/Tile.js';\nimport UrlTile from '../source/UrlTile.js';\nimport {getKey, getKeyZXY} from '../tilecoord.js';\nimport {getForProjection as getTileGridForProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer. See\n * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.\n * @property {boolean} [opaque=true] Whether the layer is opaque.\n * @property {module:ol/proj~ProjectionLike} projection Projection.\n * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {module:ol/source/State} [state] Source state.\n * @property {module:ol/ImageTile~TileClass} [tileClass] Class used to instantiate image tiles.\n * Default is {@link module:ol/ImageTile~ImageTile}.\n * @property {module:ol/tilegrid/TileGrid} [tileGrid] Tile grid.\n * @property {module:ol/Tile~LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [tilePixelRatio=1] The pixel ratio used by the tile service. For example, if the tile\n * service advertizes 256px by 256px tiles but actually sends 512px\n * by 512px images (for retina/hidpi devices) then `tilePixelRatio`\n * should be set to `2`.\n * @property {module:ol/Tile~UrlFunction} [tileUrlFunction] Optional function to get tile URL given a tile coordinate and the projection.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`, may be\n * used instead of defining each one separately in the `urls` option.\n * @property {Array.<string>} [urls] An array of URL templates.\n * @property {boolean} [wrapX] Whether to wrap the world horizontally. The default, is to\n * request out-of-bounds tiles from the server. When set to `false`, only one\n * world will be rendered. When set to `true`, tiles will be requested for one\n * world only, but they will be wrapped horizontally to render multiple worlds.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n */\n\n\n/**\n * @classdesc\n * Base class for sources providing images divided into a tile grid.\n *\n * @constructor\n * @fires module:ol/source/Tile~TileSourceEvent\n * @extends {module:ol/source/UrlTile}\n * @param {module:ol/source/TileImage~Options=} options Image tile options.\n * @api\n */\nconst TileImage = function(options) {\n\n UrlTile.call(this, {\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n extent: options.extent,\n opaque: options.opaque,\n projection: options.projection,\n state: options.state,\n tileGrid: options.tileGrid,\n tileLoadFunction: options.tileLoadFunction ?\n options.tileLoadFunction : defaultTileLoadFunction,\n tilePixelRatio: options.tilePixelRatio,\n tileUrlFunction: options.tileUrlFunction,\n url: options.url,\n urls: options.urls,\n wrapX: options.wrapX,\n transition: options.transition\n });\n\n /**\n * @protected\n * @type {?string}\n */\n this.crossOrigin =\n options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n /**\n * @protected\n * @type {function(new: module:ol/ImageTile, module:ol/tilecoord~TileCoord, module:ol/TileState, string,\n * ?string, module:ol/Tile~LoadFunction, module:ol/Tile~Options=)}\n */\n this.tileClass = options.tileClass !== undefined ?\n options.tileClass : ImageTile;\n\n /**\n * @protected\n * @type {!Object.<string, module:ol/TileCache>}\n */\n this.tileCacheForProjection = {};\n\n /**\n * @protected\n * @type {!Object.<string, module:ol/tilegrid/TileGrid>}\n */\n this.tileGridForProjection = {};\n\n /**\n * @private\n * @type {number|undefined}\n */\n this.reprojectionErrorThreshold_ = options.reprojectionErrorThreshold;\n\n /**\n * @private\n * @type {boolean}\n */\n this.renderReprojectionEdges_ = false;\n};\n\ninherits(TileImage, UrlTile);\n\n\n/**\n * @inheritDoc\n */\nTileImage.prototype.canExpireCache = function() {\n if (!ENABLE_RASTER_REPROJECTION) {\n return UrlTile.prototype.canExpireCache.call(this);\n }\n if (this.tileCache.canExpireCache()) {\n return true;\n } else {\n for (const key in this.tileCacheForProjection) {\n if (this.tileCacheForProjection[key].canExpireCache()) {\n return true;\n }\n }\n }\n return false;\n};\n\n\n/**\n * @inheritDoc\n */\nTileImage.prototype.expireCache = function(projection, usedTiles) {\n if (!ENABLE_RASTER_REPROJECTION) {\n UrlTile.prototype.expireCache.call(this, projection, usedTiles);\n return;\n }\n const usedTileCache = this.getTileCacheForProjection(projection);\n\n this.tileCache.expireCache(this.tileCache == usedTileCache ? usedTiles : {});\n for (const id in this.tileCacheForProjection) {\n const tileCache = this.tileCacheForProjection[id];\n tileCache.expireCache(tileCache == usedTileCache ? usedTiles : {});\n }\n};\n\n\n/**\n * @inheritDoc\n */\nTileImage.prototype.getGutter = function(projection) {\n if (ENABLE_RASTER_REPROJECTION &&\n this.getProjection() && projection && !equivalent(this.getProjection(), projection)) {\n return 0;\n } else {\n return this.getGutterInternal();\n }\n};\n\n\n/**\n * @protected\n * @return {number} Gutter.\n */\nTileImage.prototype.getGutterInternal = function() {\n return 0;\n};\n\n\n/**\n * @inheritDoc\n */\nTileImage.prototype.getOpaque = function(projection) {\n if (ENABLE_RASTER_REPROJECTION &&\n this.getProjection() && projection && !equivalent(this.getProjection(), projection)) {\n return false;\n } else {\n return UrlTile.prototype.getOpaque.call(this, projection);\n }\n};\n\n\n/**\n * @inheritDoc\n */\nTileImage.prototype.getTileGridForProjection = function(projection) {\n if (!ENABLE_RASTER_REPROJECTION) {\n return UrlTile.prototype.getTileGridForProjection.call(this, projection);\n }\n const thisProj = this.getProjection();\n if (this.tileGrid && (!thisProj || equivalent(thisProj, projection))) {\n return this.tileGrid;\n } else {\n const projKey = getUid(projection).toString();\n if (!(projKey in this.tileGridForProjection)) {\n this.tileGridForProjection[projKey] = getTileGridForProjection(projection);\n }\n return (\n /** @type {!module:ol/tilegrid/TileGrid} */ (this.tileGridForProjection[projKey])\n );\n }\n};\n\n\n/**\n * @inheritDoc\n */\nTileImage.prototype.getTileCacheForProjection = function(projection) {\n if (!ENABLE_RASTER_REPROJECTION) {\n return UrlTile.prototype.getTileCacheForProjection.call(this, projection);\n }\n const thisProj = this.getProjection(); if (!thisProj || equivalent(thisProj, projection)) {\n return this.tileCache;\n } else {\n const projKey = getUid(projection).toString();\n if (!(projKey in this.tileCacheForProjection)) {\n this.tileCacheForProjection[projKey] = new TileCache(this.tileCache.highWaterMark);\n }\n return this.tileCacheForProjection[projKey];\n }\n};\n\n\n/**\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @param {string} key The key set on the tile.\n * @return {!module:ol/Tile} Tile.\n * @private\n */\nTileImage.prototype.createTile_ = function(z, x, y, pixelRatio, projection, key) {\n const tileCoord = [z, x, y];\n const urlTileCoord = this.getTileCoordForTileUrlFunction(\n tileCoord, projection);\n const tileUrl = urlTileCoord ?\n this.tileUrlFunction(urlTileCoord, pixelRatio, projection) : undefined;\n const tile = new this.tileClass(\n tileCoord,\n tileUrl !== undefined ? TileState.IDLE : TileState.EMPTY,\n tileUrl !== undefined ? tileUrl : '',\n this.crossOrigin,\n this.tileLoadFunction,\n this.tileOptions);\n tile.key = key;\n listen(tile, EventType.CHANGE,\n this.handleTileChange, this);\n return tile;\n};\n\n\n/**\n * @inheritDoc\n */\nTileImage.prototype.getTile = function(z, x, y, pixelRatio, projection) {\n const sourceProjection = /** @type {!module:ol/proj/Projection} */ (this.getProjection());\n if (!ENABLE_RASTER_REPROJECTION ||\n !sourceProjection || !projection || equivalent(sourceProjection, projection)) {\n return this.getTileInternal(z, x, y, pixelRatio, sourceProjection || projection);\n } else {\n const cache = this.getTileCacheForProjection(projection);\n const tileCoord = [z, x, y];\n let tile;\n const tileCoordKey = getKey(tileCoord);\n if (cache.containsKey(tileCoordKey)) {\n tile = /** @type {!module:ol/Tile} */ (cache.get(tileCoordKey));\n }\n const key = this.getKey();\n if (tile && tile.key == key) {\n return tile;\n } else {\n const sourceTileGrid = this.getTileGridForProjection(sourceProjection);\n const targetTileGrid = this.getTileGridForProjection(projection);\n const wrappedTileCoord =\n this.getTileCoordForTileUrlFunction(tileCoord, projection);\n const newTile = new ReprojTile(\n sourceProjection, sourceTileGrid,\n projection, targetTileGrid,\n tileCoord, wrappedTileCoord, this.getTilePixelRatio(pixelRatio),\n this.getGutterInternal(),\n function(z, x, y, pixelRatio) {\n return this.getTileInternal(z, x, y, pixelRatio, sourceProjection);\n }.bind(this), this.reprojectionErrorThreshold_,\n this.renderReprojectionEdges_);\n newTile.key = key;\n\n if (tile) {\n newTile.interimTile = tile;\n newTile.refreshInterimChain();\n cache.replace(tileCoordKey, newTile);\n } else {\n cache.set(tileCoordKey, newTile);\n }\n return newTile;\n }\n }\n};\n\n\n/**\n * @param {number} z Tile coordinate z.\n * @param {number} x Tile coordinate x.\n * @param {number} y Tile coordinate y.\n * @param {number} pixelRatio Pixel ratio.\n * @param {!module:ol/proj/Projection} projection Projection.\n * @return {!module:ol/Tile} Tile.\n * @protected\n */\nTileImage.prototype.getTileInternal = function(z, x, y, pixelRatio, projection) {\n let tile = null;\n const tileCoordKey = getKeyZXY(z, x, y);\n const key = this.getKey();\n if (!this.tileCache.containsKey(tileCoordKey)) {\n tile = this.createTile_(z, x, y, pixelRatio, projection, key);\n this.tileCache.set(tileCoordKey, tile);\n } else {\n tile = this.tileCache.get(tileCoordKey);\n if (tile.key != key) {\n // The source's params changed. If the tile has an interim tile and if we\n // can use it then we use it. Otherwise we create a new tile. In both\n // cases we attempt to assign an interim tile to the new tile.\n const interimTile = tile;\n tile = this.createTile_(z, x, y, pixelRatio, projection, key);\n\n //make the new tile the head of the list,\n if (interimTile.getState() == TileState.IDLE) {\n //the old tile hasn't begun loading yet, and is now outdated, so we can simply discard it\n tile.interimTile = interimTile.interimTile;\n } else {\n tile.interimTile = interimTile;\n }\n tile.refreshInterimChain();\n this.tileCache.replace(tileCoordKey, tile);\n }\n }\n return tile;\n};\n\n\n/**\n * Sets whether to render reprojection edges or not (usually for debugging).\n * @param {boolean} render Render the edges.\n * @api\n */\nTileImage.prototype.setRenderReprojectionEdges = function(render) {\n if (!ENABLE_RASTER_REPROJECTION ||\n this.renderReprojectionEdges_ == render) {\n return;\n }\n this.renderReprojectionEdges_ = render;\n for (const id in this.tileCacheForProjection) {\n this.tileCacheForProjection[id].clear();\n }\n this.changed();\n};\n\n\n/**\n * Sets the tile grid to use when reprojecting the tiles to the given\n * projection instead of the default tile grid for the projection.\n *\n * This can be useful when the default tile grid cannot be created\n * (e.g. projection has no extent defined) or\n * for optimization reasons (custom tile size, resolutions, ...).\n *\n * @param {module:ol/proj~ProjectionLike} projection Projection.\n * @param {module:ol/tilegrid/TileGrid} tilegrid Tile grid to use for the projection.\n * @api\n */\nTileImage.prototype.setTileGridForProjection = function(projection, tilegrid) {\n if (ENABLE_RASTER_REPROJECTION) {\n const proj = getProjection(projection);\n if (proj) {\n const projKey = getUid(proj).toString();\n if (!(projKey in this.tileGridForProjection)) {\n this.tileGridForProjection[projKey] = tilegrid;\n }\n }\n }\n};\n\n\n/**\n * @param {module:ol/ImageTile} imageTile Image tile.\n * @param {string} src Source.\n */\nfunction defaultTileLoadFunction(imageTile, src) {\n imageTile.getImage().src = src;\n}\n\nexport default TileImage;\n","/**\n * @module ol/source/BingMaps\n */\nimport {inherits} from '../util.js';\nimport {createFromTileUrlFunctions} from '../tileurlfunction.js';\nimport {applyTransform, intersects} from '../extent.js';\nimport {jsonp as requestJSONP} from '../net.js';\nimport {get as getProjection, getTransformFromProjections} from '../proj.js';\nimport SourceState from '../source/State.js';\nimport TileImage from '../source/TileImage.js';\nimport {createOrUpdate, quadKey} from '../tilecoord.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {number} [cacheSize=2048] Cache size.\n * @property {boolean} [hidpi=false] If `true` hidpi tiles will be requested.\n * @property {string} [culture='en-us'] Culture code.\n * @property {string} key Bing Maps API key. Get yours at http://www.bingmapsportal.com/.\n * @property {string} imagerySet Type of imagery.\n * @property {number} [maxZoom=21] Max zoom. Default is what's advertized by the BingMaps service.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {module:ol/Tile~LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n */\n\n/**\n * @classdesc\n * Layer source for Bing Maps tile data.\n *\n * @constructor\n * @extends {module:ol/source/TileImage}\n * @param {module:ol/source/BingMaps~Options=} options Bing Maps options.\n * @api\n */\nconst BingMaps = function(options) {\n\n /**\n * @private\n * @type {boolean}\n */\n this.hidpi_ = options.hidpi !== undefined ? options.hidpi : false;\n\n TileImage.call(this, {\n cacheSize: options.cacheSize,\n crossOrigin: 'anonymous',\n opaque: true,\n projection: getProjection('EPSG:3857'),\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n state: SourceState.LOADING,\n tileLoadFunction: options.tileLoadFunction,\n tilePixelRatio: this.hidpi_ ? 2 : 1,\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n transition: options.transition\n });\n\n /**\n * @private\n * @type {string}\n */\n this.culture_ = options.culture !== undefined ? options.culture : 'en-us';\n\n /**\n * @private\n * @type {number}\n */\n this.maxZoom_ = options.maxZoom !== undefined ? options.maxZoom : -1;\n\n /**\n * @private\n * @type {string}\n */\n this.apiKey_ = options.key;\n\n /**\n * @private\n * @type {string}\n */\n this.imagerySet_ = options.imagerySet;\n\n const url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/' +\n this.imagerySet_ +\n '?uriScheme=https&include=ImageryProviders&key=' + this.apiKey_ +\n '&c=' + this.culture_;\n\n requestJSONP(url, this.handleImageryMetadataResponse.bind(this), undefined,\n 'jsonp');\n\n};\n\ninherits(BingMaps, TileImage);\n\n\n/**\n * The attribution containing a link to the Microsoft® Bingâ„¢ Maps Platform APIs’\n * Terms Of Use.\n * @const\n * @type {string}\n */\nconst TOS_ATTRIBUTION = '<a class=\"ol-attribution-bing-tos\" ' +\n 'href=\"https://www.microsoft.com/maps/product/terms.html\">' +\n 'Terms of Use</a>';\n\n\n/**\n * Get the api key used for this source.\n *\n * @return {string} The api key.\n * @api\n */\nBingMaps.prototype.getApiKey = function() {\n return this.apiKey_;\n};\n\n\n/**\n * Get the imagery set associated with this source.\n *\n * @return {string} The imagery set.\n * @api\n */\nBingMaps.prototype.getImagerySet = function() {\n return this.imagerySet_;\n};\n\n\n/**\n * @param {BingMapsImageryMetadataResponse} response Response.\n */\nBingMaps.prototype.handleImageryMetadataResponse = function(response) {\n if (response.statusCode != 200 ||\n response.statusDescription != 'OK' ||\n response.authenticationResultCode != 'ValidCredentials' ||\n response.resourceSets.length != 1 ||\n response.resourceSets[0].resources.length != 1) {\n this.setState(SourceState.ERROR);\n return;\n }\n\n const resource = response.resourceSets[0].resources[0];\n const maxZoom = this.maxZoom_ == -1 ? resource.zoomMax : this.maxZoom_;\n\n const sourceProjection = this.getProjection();\n const extent = extentFromProjection(sourceProjection);\n const tileSize = resource.imageWidth == resource.imageHeight ?\n resource.imageWidth : [resource.imageWidth, resource.imageHeight];\n const tileGrid = createXYZ({\n extent: extent,\n minZoom: resource.zoomMin,\n maxZoom: maxZoom,\n tileSize: tileSize / (this.hidpi_ ? 2 : 1)\n });\n this.tileGrid = tileGrid;\n\n const culture = this.culture_;\n const hidpi = this.hidpi_;\n this.tileUrlFunction = createFromTileUrlFunctions(\n resource.imageUrlSubdomains.map(function(subdomain) {\n const quadKeyTileCoord = [0, 0, 0];\n const imageUrl = resource.imageUrl\n .replace('{subdomain}', subdomain)\n .replace('{culture}', culture);\n return (\n /**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {string|undefined} Tile URL.\n */\n function(tileCoord, pixelRatio, projection) {\n if (!tileCoord) {\n return undefined;\n } else {\n createOrUpdate(tileCoord[0], tileCoord[1], -tileCoord[2] - 1, quadKeyTileCoord);\n let url = imageUrl;\n if (hidpi) {\n url += '&dpi=d1&device=mobile';\n }\n return url.replace('{quadkey}', quadKey(quadKeyTileCoord));\n }\n }\n );\n }));\n\n if (resource.imageryProviders) {\n const transform = getTransformFromProjections(\n getProjection('EPSG:4326'), this.getProjection());\n\n this.setAttributions(function(frameState) {\n const attributions = [];\n const zoom = frameState.viewState.zoom;\n resource.imageryProviders.map(function(imageryProvider) {\n let intersecting = false;\n const coverageAreas = imageryProvider.coverageAreas;\n for (let i = 0, ii = coverageAreas.length; i < ii; ++i) {\n const coverageArea = coverageAreas[i];\n if (zoom >= coverageArea.zoomMin && zoom <= coverageArea.zoomMax) {\n const bbox = coverageArea.bbox;\n const epsg4326Extent = [bbox[1], bbox[0], bbox[3], bbox[2]];\n const extent = applyTransform(epsg4326Extent, transform);\n if (intersects(extent, frameState.extent)) {\n intersecting = true;\n break;\n }\n }\n }\n if (intersecting) {\n attributions.push(imageryProvider.attribution);\n }\n });\n\n attributions.push(TOS_ATTRIBUTION);\n return attributions;\n });\n }\n\n this.setState(SourceState.READY);\n};\nexport default BingMaps;\n","/**\n * @module ol/source/XYZ\n */\nimport {inherits} from '../util.js';\nimport TileImage from '../source/TileImage.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer. See\n * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.\n * @property {boolean} [opaque=true] Whether the layer is opaque.\n * @property {module:ol/proj~ProjectionLike} [projection='EPSG:3857'] Projection.\n * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {number} [maxZoom=18] Optional max zoom level.\n * @property {number} [minZoom=0] Optional min zoom level.\n * @property {module:ol/tilegrid/TileGrid} [tileGrid] Tile grid.\n * @property {module:ol/Tile~LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {number} [tilePixelRatio=1] The pixel ratio used by the tile service.\n * For example, if the tile service advertizes 256px by 256px tiles but actually sends 512px\n * by 512px images (for retina/hidpi devices) then `tilePixelRatio`\n * should be set to `2`.\n * @property {number|module:ol/size~Size} [tileSize=[256, 256]] The tile size used by the tile service.\n * @property {module:ol/Tile~UrlFunction} [tileUrlFunction] Optional function to get\n * tile URL given a tile coordinate and the projection.\n * Required if url or urls are not provided.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`,\n * and `{z}` placeholders. A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`,\n * may be used instead of defining each one separately in the `urls` option.\n * @property {Array.<string>} [urls] An array of URL templates.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n */\n\n\n/**\n * @classdesc\n * Layer source for tile data with URLs in a set XYZ format that are\n * defined in a URL template. By default, this follows the widely-used\n * Google grid where `x` 0 and `y` 0 are in the top left. Grids like\n * TMS where `x` 0 and `y` 0 are in the bottom left can be used by\n * using the `{-y}` placeholder in the URL template, so long as the\n * source does not have a custom tile grid. In this case,\n * {@link module:ol/source/TileImage} can be used with a `tileUrlFunction`\n * such as:\n *\n * tileUrlFunction: function(coordinate) {\n * return 'http://mapserver.com/' + coordinate[0] + '/' +\n * coordinate[1] + '/' + coordinate[2] + '.png';\n * }\n *\n *\n * @constructor\n * @extends {module:ol/source/TileImage}\n * @param {module:ol/source/XYZ~Options=} opt_options XYZ options.\n * @api\n */\nconst XYZ = function(opt_options) {\n const options = opt_options || {};\n const projection = options.projection !== undefined ?\n options.projection : 'EPSG:3857';\n\n const tileGrid = options.tileGrid !== undefined ? options.tileGrid :\n createXYZ({\n extent: extentFromProjection(projection),\n maxZoom: options.maxZoom,\n minZoom: options.minZoom,\n tileSize: options.tileSize\n });\n\n TileImage.call(this, {\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n opaque: options.opaque,\n projection: projection,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileGrid: tileGrid,\n tileLoadFunction: options.tileLoadFunction,\n tilePixelRatio: options.tilePixelRatio,\n tileUrlFunction: options.tileUrlFunction,\n url: options.url,\n urls: options.urls,\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n transition: options.transition\n });\n\n};\n\ninherits(XYZ, TileImage);\nexport default XYZ;\n","/**\n * @module ol/source/CartoDB\n */\nimport {inherits} from '../util.js';\nimport {assign} from '../obj.js';\nimport SourceState from '../source/State.js';\nimport XYZ from '../source/XYZ.js';\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer. See\n * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.\n * @property {module:ol/proj~ProjectionLike} [projection='EPSG:3857'] Projection.\n * @property {number} [maxZoom=18] Max zoom.\n * @property {number} [minZoom] Minimum zoom.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {Object} [config] If using anonymous maps, the CartoDB config to use. See\n * {@link http://docs.cartodb.com/cartodb-platform/maps-api/anonymous-maps/}\n * for more detail.\n * If using named maps, a key-value lookup with the template parameters.\n * See {@link http://docs.cartodb.com/cartodb-platform/maps-api/named-maps/}\n * for more detail.\n * @property {string} [map] If using named maps, this will be the name of the template to load.\n * See {@link http://docs.cartodb.com/cartodb-platform/maps-api/named-maps/}\n * for more detail.\n * @property {string} account If using named maps, this will be the name of the template to load.\n */\n\n\n/**\n * @classdesc\n * Layer source for the CartoDB Maps API.\n *\n * @constructor\n * @extends {module:ol/source/XYZ}\n * @param {module:ol/source/CartoDB~Options=} options CartoDB options.\n * @api\n */\nconst CartoDB = function(options) {\n\n /**\n * @type {string}\n * @private\n */\n this.account_ = options.account;\n\n /**\n * @type {string}\n * @private\n */\n this.mapId_ = options.map || '';\n\n /**\n * @type {!Object}\n * @private\n */\n this.config_ = options.config || {};\n\n /**\n * @type {!Object.<string, CartoDBLayerInfo>}\n * @private\n */\n this.templateCache_ = {};\n\n XYZ.call(this, {\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n maxZoom: options.maxZoom !== undefined ? options.maxZoom : 18,\n minZoom: options.minZoom,\n projection: options.projection,\n state: SourceState.LOADING,\n wrapX: options.wrapX\n });\n this.initializeMap_();\n};\n\ninherits(CartoDB, XYZ);\n\n\n/**\n * Returns the current config.\n * @return {!Object} The current configuration.\n * @api\n */\nCartoDB.prototype.getConfig = function() {\n return this.config_;\n};\n\n\n/**\n * Updates the carto db config.\n * @param {Object} config a key-value lookup. Values will replace current values\n * in the config.\n * @api\n */\nCartoDB.prototype.updateConfig = function(config) {\n assign(this.config_, config);\n this.initializeMap_();\n};\n\n\n/**\n * Sets the CartoDB config\n * @param {Object} config In the case of anonymous maps, a CartoDB configuration\n * object.\n * If using named maps, a key-value lookup with the template parameters.\n * @api\n */\nCartoDB.prototype.setConfig = function(config) {\n this.config_ = config || {};\n this.initializeMap_();\n};\n\n\n/**\n * Issue a request to initialize the CartoDB map.\n * @private\n */\nCartoDB.prototype.initializeMap_ = function() {\n const paramHash = JSON.stringify(this.config_);\n if (this.templateCache_[paramHash]) {\n this.applyTemplate_(this.templateCache_[paramHash]);\n return;\n }\n let mapUrl = 'https://' + this.account_ + '.carto.com/api/v1/map';\n\n if (this.mapId_) {\n mapUrl += '/named/' + this.mapId_;\n }\n\n const client = new XMLHttpRequest();\n client.addEventListener('load', this.handleInitResponse_.bind(this, paramHash));\n client.addEventListener('error', this.handleInitError_.bind(this));\n client.open('POST', mapUrl);\n client.setRequestHeader('Content-type', 'application/json');\n client.send(JSON.stringify(this.config_));\n};\n\n\n/**\n * Handle map initialization response.\n * @param {string} paramHash a hash representing the parameter set that was used\n * for the request\n * @param {Event} event Event.\n * @private\n */\nCartoDB.prototype.handleInitResponse_ = function(paramHash, event) {\n const client = /** @type {XMLHttpRequest} */ (event.target);\n // status will be 0 for file:// urls\n if (!client.status || client.status >= 200 && client.status < 300) {\n let response;\n try {\n response = /** @type {CartoDBLayerInfo} */(JSON.parse(client.responseText));\n } catch (err) {\n this.setState(SourceState.ERROR);\n return;\n }\n this.applyTemplate_(response);\n this.templateCache_[paramHash] = response;\n this.setState(SourceState.READY);\n } else {\n this.setState(SourceState.ERROR);\n }\n};\n\n\n/**\n * @private\n * @param {Event} event Event.\n */\nCartoDB.prototype.handleInitError_ = function(event) {\n this.setState(SourceState.ERROR);\n};\n\n\n/**\n * Apply the new tile urls returned by carto db\n * @param {CartoDBLayerInfo} data Result of carto db call.\n * @private\n */\nCartoDB.prototype.applyTemplate_ = function(data) {\n const tilesUrl = 'https://' + data.cdn_url.https + '/' + this.account_ +\n '/api/v1/map/' + data.layergroupid + '/{z}/{x}/{y}.png';\n this.setUrl(tilesUrl);\n};\nexport default CartoDB;\n","/**\n * @module ol/source/Cluster\n */\n\nimport {getUid, inherits} from '../util.js';\nimport {assert} from '../asserts.js';\nimport Feature from '../Feature.js';\nimport {scale as scaleCoordinate, add as addCoordinate} from '../coordinate.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {buffer, createEmpty, createOrUpdateFromCoordinate} from '../extent.js';\nimport Point from '../geom/Point.js';\nimport VectorSource from '../source/Vector.js';\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {number} [distance=20] Minimum distance in pixels between clusters.\n * @property {module:ol/extent~Extent} [extent] Extent.\n * @property {function(module:ol/Feature):module:ol/geom/Point} [geometryFunction]\n * Function that takes an {@link module:ol/Feature} as argument and returns an\n * {@link module:ol/geom/Point} as cluster calculation point for the feature. When a\n * feature should not be considered for clustering, the function should return\n * `null`. The default, which works when the underyling source contains point\n * features only, is\n * ```js\n * function(feature) {\n * return feature.getGeometry();\n * }\n * ```\n * See {@link module:ol/geom/Polygon~Polygon#getInteriorPoint} for a way to get a cluster\n * calculation point for polygons.\n * @property {module:ol/proj~ProjectionLike} projection Projection.\n * @property {module:ol/source/Vector} source Source.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n */\n\n\n/**\n * @classdesc\n * Layer source to cluster vector data. Works out of the box with point\n * geometries. For other geometry types, or if not all geometries should be\n * considered for clustering, a custom `geometryFunction` can be defined.\n *\n * @constructor\n * @param {module:ol/source/Cluster~Options=} options Cluster options.\n * @extends {module:ol/source/Vector}\n * @api\n */\nconst Cluster = function(options) {\n VectorSource.call(this, {\n attributions: options.attributions,\n extent: options.extent,\n projection: options.projection,\n wrapX: options.wrapX\n });\n\n /**\n * @type {number|undefined}\n * @protected\n */\n this.resolution = undefined;\n\n /**\n * @type {number}\n * @protected\n */\n this.distance = options.distance !== undefined ? options.distance : 20;\n\n /**\n * @type {Array.<module:ol/Feature>}\n * @protected\n */\n this.features = [];\n\n /**\n * @param {module:ol/Feature} feature Feature.\n * @return {module:ol/geom/Point} Cluster calculation point.\n * @protected\n */\n this.geometryFunction = options.geometryFunction || function(feature) {\n const geometry = /** @type {module:ol/geom/Point} */ (feature.getGeometry());\n assert(geometry instanceof Point,\n 10); // The default `geometryFunction` can only handle `module:ol/geom/Point~Point` geometries\n return geometry;\n };\n\n /**\n * @type {module:ol/source/Vector}\n * @protected\n */\n this.source = options.source;\n\n listen(this.source, EventType.CHANGE, this.refresh, this);\n};\n\ninherits(Cluster, VectorSource);\n\n\n/**\n * Get the distance in pixels between clusters.\n * @return {number} Distance.\n * @api\n */\nCluster.prototype.getDistance = function() {\n return this.distance;\n};\n\n\n/**\n * Get a reference to the wrapped source.\n * @return {module:ol/source/Vector} Source.\n * @api\n */\nCluster.prototype.getSource = function() {\n return this.source;\n};\n\n\n/**\n * @inheritDoc\n */\nCluster.prototype.loadFeatures = function(extent, resolution, projection) {\n this.source.loadFeatures(extent, resolution, projection);\n if (resolution !== this.resolution) {\n this.clear();\n this.resolution = resolution;\n this.cluster();\n this.addFeatures(this.features);\n }\n};\n\n\n/**\n * Set the distance in pixels between clusters.\n * @param {number} distance The distance in pixels.\n * @api\n */\nCluster.prototype.setDistance = function(distance) {\n this.distance = distance;\n this.refresh();\n};\n\n\n/**\n * handle the source changing\n * @override\n */\nCluster.prototype.refresh = function() {\n this.clear();\n this.cluster();\n this.addFeatures(this.features);\n VectorSource.prototype.refresh.call(this);\n};\n\n\n/**\n * @protected\n */\nCluster.prototype.cluster = function() {\n if (this.resolution === undefined) {\n return;\n }\n this.features.length = 0;\n const extent = createEmpty();\n const mapDistance = this.distance * this.resolution;\n const features = this.source.getFeatures();\n\n /**\n * @type {!Object.<string, boolean>}\n */\n const clustered = {};\n\n for (let i = 0, ii = features.length; i < ii; i++) {\n const feature = features[i];\n if (!(getUid(feature).toString() in clustered)) {\n const geometry = this.geometryFunction(feature);\n if (geometry) {\n const coordinates = geometry.getCoordinates();\n createOrUpdateFromCoordinate(coordinates, extent);\n buffer(extent, mapDistance, extent);\n\n let neighbors = this.source.getFeaturesInExtent(extent);\n neighbors = neighbors.filter(function(neighbor) {\n const uid = getUid(neighbor).toString();\n if (!(uid in clustered)) {\n clustered[uid] = true;\n return true;\n } else {\n return false;\n }\n });\n this.features.push(this.createCluster(neighbors));\n }\n }\n }\n};\n\n\n/**\n * @param {Array.<module:ol/Feature>} features Features\n * @return {module:ol/Feature} The cluster feature.\n * @protected\n */\nCluster.prototype.createCluster = function(features) {\n const centroid = [0, 0];\n for (let i = features.length - 1; i >= 0; --i) {\n const geometry = this.geometryFunction(features[i]);\n if (geometry) {\n addCoordinate(centroid, geometry.getCoordinates());\n } else {\n features.splice(i, 1);\n }\n }\n scaleCoordinate(centroid, 1 / features.length);\n\n const cluster = new Feature(new Point(centroid));\n cluster.set('features', features);\n return cluster;\n};\nexport default Cluster;\n","/**\n * @module ol/reproj/Image\n */\nimport {ERROR_THRESHOLD} from './common.js';\nimport {inherits} from '../util.js';\nimport ImageBase from '../ImageBase.js';\nimport ImageState from '../ImageState.js';\nimport {listen, unlistenByKey} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {getCenter, getIntersection, getHeight, getWidth} from '../extent.js';\nimport {calculateSourceResolution, render as renderReprojected} from '../reproj.js';\nimport Triangulation from '../reproj/Triangulation.js';\n\n\n/**\n * @typedef {function(module:ol/extent~Extent, number, number) : module:ol/ImageBase} FunctionType\n */\n\n\n/**\n * @classdesc\n * Class encapsulating single reprojected image.\n * See {@link module:ol/source/Image~ImageSource}.\n *\n * @constructor\n * @extends {module:ol/ImageBase}\n * @param {module:ol/proj/Projection} sourceProj Source projection (of the data).\n * @param {module:ol/proj/Projection} targetProj Target projection.\n * @param {module:ol/extent~Extent} targetExtent Target extent.\n * @param {number} targetResolution Target resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/reproj/Image~FunctionType} getImageFunction\n * Function returning source images (extent, resolution, pixelRatio).\n */\nconst ReprojImage = function(sourceProj, targetProj,\n targetExtent, targetResolution, pixelRatio, getImageFunction) {\n\n /**\n * @private\n * @type {module:ol/proj/Projection}\n */\n this.targetProj_ = targetProj;\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.maxSourceExtent_ = sourceProj.getExtent();\n const maxTargetExtent = targetProj.getExtent();\n\n const limitedTargetExtent = maxTargetExtent ?\n getIntersection(targetExtent, maxTargetExtent) : targetExtent;\n\n const targetCenter = getCenter(limitedTargetExtent);\n const sourceResolution = calculateSourceResolution(\n sourceProj, targetProj, targetCenter, targetResolution);\n\n const errorThresholdInPixels = ERROR_THRESHOLD;\n\n /**\n * @private\n * @type {!module:ol/reproj/Triangulation}\n */\n this.triangulation_ = new Triangulation(\n sourceProj, targetProj, limitedTargetExtent, this.maxSourceExtent_,\n sourceResolution * errorThresholdInPixels);\n\n /**\n * @private\n * @type {number}\n */\n this.targetResolution_ = targetResolution;\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.targetExtent_ = targetExtent;\n\n const sourceExtent = this.triangulation_.calculateSourceExtent();\n\n /**\n * @private\n * @type {module:ol/ImageBase}\n */\n this.sourceImage_ =\n getImageFunction(sourceExtent, sourceResolution, pixelRatio);\n\n /**\n * @private\n * @type {number}\n */\n this.sourcePixelRatio_ =\n this.sourceImage_ ? this.sourceImage_.getPixelRatio() : 1;\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = null;\n\n /**\n * @private\n * @type {?module:ol/events~EventsKey}\n */\n this.sourceListenerKey_ = null;\n\n\n let state = ImageState.LOADED;\n\n if (this.sourceImage_) {\n state = ImageState.IDLE;\n }\n\n ImageBase.call(this, targetExtent, targetResolution, this.sourcePixelRatio_, state);\n};\n\ninherits(ReprojImage, ImageBase);\n\n\n/**\n * @inheritDoc\n */\nReprojImage.prototype.disposeInternal = function() {\n if (this.state == ImageState.LOADING) {\n this.unlistenSource_();\n }\n ImageBase.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * @inheritDoc\n */\nReprojImage.prototype.getImage = function() {\n return this.canvas_;\n};\n\n\n/**\n * @return {module:ol/proj/Projection} Projection.\n */\nReprojImage.prototype.getProjection = function() {\n return this.targetProj_;\n};\n\n\n/**\n * @private\n */\nReprojImage.prototype.reproject_ = function() {\n const sourceState = this.sourceImage_.getState();\n if (sourceState == ImageState.LOADED) {\n const width = getWidth(this.targetExtent_) / this.targetResolution_;\n const height = getHeight(this.targetExtent_) / this.targetResolution_;\n\n this.canvas_ = renderReprojected(width, height, this.sourcePixelRatio_,\n this.sourceImage_.getResolution(), this.maxSourceExtent_,\n this.targetResolution_, this.targetExtent_, this.triangulation_, [{\n extent: this.sourceImage_.getExtent(),\n image: this.sourceImage_.getImage()\n }], 0);\n }\n this.state = sourceState;\n this.changed();\n};\n\n\n/**\n * @inheritDoc\n */\nReprojImage.prototype.load = function() {\n if (this.state == ImageState.IDLE) {\n this.state = ImageState.LOADING;\n this.changed();\n\n const sourceState = this.sourceImage_.getState();\n if (sourceState == ImageState.LOADED || sourceState == ImageState.ERROR) {\n this.reproject_();\n } else {\n this.sourceListenerKey_ = listen(this.sourceImage_,\n EventType.CHANGE, function(e) {\n const sourceState = this.sourceImage_.getState();\n if (sourceState == ImageState.LOADED || sourceState == ImageState.ERROR) {\n this.unlistenSource_();\n this.reproject_();\n }\n }, this);\n this.sourceImage_.load();\n }\n }\n};\n\n\n/**\n * @private\n */\nReprojImage.prototype.unlistenSource_ = function() {\n unlistenByKey(/** @type {!module:ol/events~EventsKey} */ (this.sourceListenerKey_));\n this.sourceListenerKey_ = null;\n};\nexport default ReprojImage;\n","/**\n * @module ol/source/Image\n */\nimport {ENABLE_RASTER_REPROJECTION} from '../reproj/common.js';\nimport {inherits} from '../util.js';\nimport ImageState from '../ImageState.js';\nimport {linearFindNearest} from '../array.js';\nimport Event from '../events/Event.js';\nimport {equals} from '../extent.js';\nimport {equivalent} from '../proj.js';\nimport ReprojImage from '../reproj/Image.js';\nimport Source from '../source/Source.js';\n\n\n/**\n * @enum {string}\n */\nconst ImageSourceEventType = {\n\n /**\n * Triggered when an image starts loading.\n * @event ol/source/Image~ImageSourceEvent#imageloadstart\n * @api\n */\n IMAGELOADSTART: 'imageloadstart',\n\n /**\n * Triggered when an image finishes loading.\n * @event ol/source/Image~ImageSourceEvent#imageloadend\n * @api\n */\n IMAGELOADEND: 'imageloadend',\n\n /**\n * Triggered if image loading results in an error.\n * @event ol/source/Image~ImageSourceEvent#imageloaderror\n * @api\n */\n IMAGELOADERROR: 'imageloaderror'\n\n};\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Image~ImageSource} instances are instances of this\n * type.\n *\n * @constructor\n * @extends {module:ol/events/Event}\n * @param {string} type Type.\n * @param {module:ol/Image} image The image.\n */\nconst ImageSourceEvent = function(type, image) {\n\n Event.call(this, type);\n\n /**\n * The image related to the event.\n * @type {module:ol/Image}\n * @api\n */\n this.image = image;\n\n};\ninherits(ImageSourceEvent, Event);\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions]\n * @property {module:ol/extent~Extent} [extent]\n * @property {module:ol/proj~ProjectionLike} projection\n * @property {Array.<number>} [resolutions]\n * @property {module:ol/source/State} [state]\n */\n\n\n/**\n * @classdesc\n * Abstract base class; normally only used for creating subclasses and not\n * instantiated in apps.\n * Base class for sources providing a single image.\n *\n * @constructor\n * @abstract\n * @extends {module:ol/source/Source}\n * @param {module:ol/source/Image~Options} options Single image source options.\n * @api\n */\nconst ImageSource = function(options) {\n Source.call(this, {\n attributions: options.attributions,\n extent: options.extent,\n projection: options.projection,\n state: options.state\n });\n\n /**\n * @private\n * @type {Array.<number>}\n */\n this.resolutions_ = options.resolutions !== undefined ?\n options.resolutions : null;\n\n\n /**\n * @private\n * @type {module:ol/reproj/Image}\n */\n this.reprojectedImage_ = null;\n\n\n /**\n * @private\n * @type {number}\n */\n this.reprojectedRevision_ = 0;\n};\n\ninherits(ImageSource, Source);\n\n\n/**\n * @return {Array.<number>} Resolutions.\n * @override\n */\nImageSource.prototype.getResolutions = function() {\n return this.resolutions_;\n};\n\n\n/**\n * @protected\n * @param {number} resolution Resolution.\n * @return {number} Resolution.\n */\nImageSource.prototype.findNearestResolution = function(resolution) {\n if (this.resolutions_) {\n const idx = linearFindNearest(this.resolutions_, resolution, 0);\n resolution = this.resolutions_[idx];\n }\n return resolution;\n};\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {module:ol/ImageBase} Single image.\n */\nImageSource.prototype.getImage = function(extent, resolution, pixelRatio, projection) {\n const sourceProjection = this.getProjection();\n if (!ENABLE_RASTER_REPROJECTION ||\n !sourceProjection ||\n !projection ||\n equivalent(sourceProjection, projection)) {\n if (sourceProjection) {\n projection = sourceProjection;\n }\n return this.getImageInternal(extent, resolution, pixelRatio, projection);\n } else {\n if (this.reprojectedImage_) {\n if (this.reprojectedRevision_ == this.getRevision() &&\n equivalent(\n this.reprojectedImage_.getProjection(), projection) &&\n this.reprojectedImage_.getResolution() == resolution &&\n equals(this.reprojectedImage_.getExtent(), extent)) {\n return this.reprojectedImage_;\n }\n this.reprojectedImage_.dispose();\n this.reprojectedImage_ = null;\n }\n\n this.reprojectedImage_ = new ReprojImage(\n sourceProjection, projection, extent, resolution, pixelRatio,\n function(extent, resolution, pixelRatio) {\n return this.getImageInternal(extent, resolution,\n pixelRatio, sourceProjection);\n }.bind(this));\n this.reprojectedRevision_ = this.getRevision();\n\n return this.reprojectedImage_;\n }\n};\n\n\n/**\n * @abstract\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {number} resolution Resolution.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {module:ol/ImageBase} Single image.\n * @protected\n */\nImageSource.prototype.getImageInternal = function(extent, resolution, pixelRatio, projection) {};\n\n\n/**\n * Handle image change events.\n * @param {module:ol/events/Event} event Event.\n * @protected\n */\nImageSource.prototype.handleImageChange = function(event) {\n const image = /** @type {module:ol/Image} */ (event.target);\n switch (image.getState()) {\n case ImageState.LOADING:\n this.dispatchEvent(\n new ImageSourceEvent(ImageSourceEventType.IMAGELOADSTART,\n image));\n break;\n case ImageState.LOADED:\n this.dispatchEvent(\n new ImageSourceEvent(ImageSourceEventType.IMAGELOADEND,\n image));\n break;\n case ImageState.ERROR:\n this.dispatchEvent(\n new ImageSourceEvent(ImageSourceEventType.IMAGELOADERROR,\n image));\n break;\n default:\n // pass\n }\n};\n\n\n/**\n * Default image load function for image sources that use module:ol/Image~Image image\n * instances.\n * @param {module:ol/Image} image Image.\n * @param {string} src Source.\n */\nexport function defaultImageLoadFunction(image, src) {\n image.getImage().src = src;\n}\n\n\nexport default ImageSource;\n","/**\n * @module ol/uri\n */\n\n\n/**\n * Appends query parameters to a URI.\n *\n * @param {string} uri The original URI, which may already have query data.\n * @param {!Object} params An object where keys are URI-encoded parameter keys,\n * and the values are arbitrary types or arrays.\n * @return {string} The new URI.\n */\nexport function appendParams(uri, params) {\n const keyParams = [];\n // Skip any null or undefined parameter values\n Object.keys(params).forEach(function(k) {\n if (params[k] !== null && params[k] !== undefined) {\n keyParams.push(k + '=' + encodeURIComponent(params[k]));\n }\n });\n const qs = keyParams.join('&');\n // remove any trailing ? or &\n uri = uri.replace(/[?&]$/, '');\n // append ? or & depending on whether uri has existing parameters\n uri = uri.indexOf('?') === -1 ? uri + '?' : uri + '&';\n return uri + qs;\n}\n","/**\n * @module ol/source/ImageArcGISRest\n */\nimport {inherits} from '../util.js';\nimport ImageWrapper from '../Image.js';\nimport {assert} from '../asserts.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {containsExtent, getHeight, getWidth} from '../extent.js';\nimport {assign} from '../obj.js';\nimport ImageSource, {defaultImageLoadFunction} from '../source/Image.js';\nimport {appendParams} from '../uri.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer. See\n * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting the image from\n * the remote server.\n * @property {module:ol/Image~LoadFunction} [imageLoadFunction] Optional function to load an image given\n * a URL.\n * @property {Object.<string,*>} params ArcGIS Rest parameters. This field is optional. Service\n * defaults will be used for any fields not specified. `FORMAT` is `PNG32` by default. `F` is\n * `IMAGE` by default. `TRANSPARENT` is `true` by default. `BBOX, `SIZE`, `BBOXSR`, and `IMAGESR`\n * will be set dynamically. Set `LAYERS` to override the default service layer visibility. See\n * {@link http://resources.arcgis.com/en/help/arcgis-rest-api/index.html#/Export_Map/02r3000000v7000000/}\n * for further reference.\n * @property {module:ol/proj~ProjectionLike} projection Projection.\n * @property {number} [ratio=1.5] Ratio. `1` means image requests are the size of the map viewport,\n * `2` means twice the size of the map viewport, and so on.\n * @property {Array.<number>} [resolutions] Resolutions. If specified, requests will be made for\n * these resolutions only.\n * @property {string} [url] ArcGIS Rest service URL for a Map Service or Image Service. The url\n * should include /MapServer or /ImageServer.\n */\n\n\n/**\n * @classdesc\n * Source for data from ArcGIS Rest services providing single, untiled images.\n * Useful when underlying map service has labels.\n *\n * If underlying map service is not using labels,\n * take advantage of ol image caching and use\n * {@link module:ol/source/TileArcGISRest} data source.\n *\n * @constructor\n * @fires ol/source/Image~ImageSourceEvent\n * @extends {module:ol/source/Image}\n * @param {module:ol/source/ImageArcGISRest~Options=} opt_options Image ArcGIS Rest Options.\n * @api\n */\nconst ImageArcGISRest = function(opt_options) {\n\n const options = opt_options || {};\n\n ImageSource.call(this, {\n attributions: options.attributions,\n projection: options.projection,\n resolutions: options.resolutions\n });\n\n /**\n * @private\n * @type {?string}\n */\n this.crossOrigin_ =\n options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n /**\n * @private\n * @type {boolean}\n */\n this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.url_ = options.url;\n\n /**\n * @private\n * @type {module:ol/Image~LoadFunction}\n */\n this.imageLoadFunction_ = options.imageLoadFunction !== undefined ?\n options.imageLoadFunction : defaultImageLoadFunction;\n\n\n /**\n * @private\n * @type {!Object}\n */\n this.params_ = options.params || {};\n\n /**\n * @private\n * @type {module:ol/Image}\n */\n this.image_ = null;\n\n /**\n * @private\n * @type {module:ol/size~Size}\n */\n this.imageSize_ = [0, 0];\n\n\n /**\n * @private\n * @type {number}\n */\n this.renderedRevision_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.ratio_ = options.ratio !== undefined ? options.ratio : 1.5;\n\n};\n\ninherits(ImageArcGISRest, ImageSource);\n\n\n/**\n * Get the user-provided params, i.e. those passed to the constructor through\n * the \"params\" option, and possibly updated using the updateParams method.\n * @return {Object} Params.\n * @api\n */\nImageArcGISRest.prototype.getParams = function() {\n return this.params_;\n};\n\n\n/**\n * @inheritDoc\n */\nImageArcGISRest.prototype.getImageInternal = function(extent, resolution, pixelRatio, projection) {\n\n if (this.url_ === undefined) {\n return null;\n }\n\n resolution = this.findNearestResolution(resolution);\n pixelRatio = this.hidpi_ ? pixelRatio : 1;\n\n const image = this.image_;\n if (image &&\n this.renderedRevision_ == this.getRevision() &&\n image.getResolution() == resolution &&\n image.getPixelRatio() == pixelRatio &&\n containsExtent(image.getExtent(), extent)) {\n return image;\n }\n\n const params = {\n 'F': 'image',\n 'FORMAT': 'PNG32',\n 'TRANSPARENT': true\n };\n assign(params, this.params_);\n\n extent = extent.slice();\n const centerX = (extent[0] + extent[2]) / 2;\n const centerY = (extent[1] + extent[3]) / 2;\n if (this.ratio_ != 1) {\n const halfWidth = this.ratio_ * getWidth(extent) / 2;\n const halfHeight = this.ratio_ * getHeight(extent) / 2;\n extent[0] = centerX - halfWidth;\n extent[1] = centerY - halfHeight;\n extent[2] = centerX + halfWidth;\n extent[3] = centerY + halfHeight;\n }\n\n const imageResolution = resolution / pixelRatio;\n\n // Compute an integer width and height.\n const width = Math.ceil(getWidth(extent) / imageResolution);\n const height = Math.ceil(getHeight(extent) / imageResolution);\n\n // Modify the extent to match the integer width and height.\n extent[0] = centerX - imageResolution * width / 2;\n extent[2] = centerX + imageResolution * width / 2;\n extent[1] = centerY - imageResolution * height / 2;\n extent[3] = centerY + imageResolution * height / 2;\n\n this.imageSize_[0] = width;\n this.imageSize_[1] = height;\n\n const url = this.getRequestUrl_(extent, this.imageSize_, pixelRatio,\n projection, params);\n\n this.image_ = new ImageWrapper(extent, resolution, pixelRatio,\n url, this.crossOrigin_, this.imageLoadFunction_);\n\n this.renderedRevision_ = this.getRevision();\n\n listen(this.image_, EventType.CHANGE,\n this.handleImageChange, this);\n\n return this.image_;\n\n};\n\n\n/**\n * Return the image load function of the source.\n * @return {module:ol/Image~LoadFunction} The image load function.\n * @api\n */\nImageArcGISRest.prototype.getImageLoadFunction = function() {\n return this.imageLoadFunction_;\n};\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {module:ol/size~Size} size Size.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @param {Object} params Params.\n * @return {string} Request URL.\n * @private\n */\nImageArcGISRest.prototype.getRequestUrl_ = function(extent, size, pixelRatio, projection, params) {\n // ArcGIS Server only wants the numeric portion of the projection ID.\n const srid = projection.getCode().split(':').pop();\n\n params['SIZE'] = size[0] + ',' + size[1];\n params['BBOX'] = extent.join(',');\n params['BBOXSR'] = srid;\n params['IMAGESR'] = srid;\n params['DPI'] = Math.round(90 * pixelRatio);\n\n const url = this.url_;\n\n const modifiedUrl = url\n .replace(/MapServer\\/?$/, 'MapServer/export')\n .replace(/ImageServer\\/?$/, 'ImageServer/exportImage');\n if (modifiedUrl == url) {\n assert(false, 50); // `options.featureTypes` should be an Array\n }\n return appendParams(modifiedUrl, params);\n};\n\n\n/**\n * Return the URL used for this ArcGIS source.\n * @return {string|undefined} URL.\n * @api\n */\nImageArcGISRest.prototype.getUrl = function() {\n return this.url_;\n};\n\n\n/**\n * Set the image load function of the source.\n * @param {module:ol/Image~LoadFunction} imageLoadFunction Image load function.\n * @api\n */\nImageArcGISRest.prototype.setImageLoadFunction = function(imageLoadFunction) {\n this.image_ = null;\n this.imageLoadFunction_ = imageLoadFunction;\n this.changed();\n};\n\n\n/**\n * Set the URL to use for requests.\n * @param {string|undefined} url URL.\n * @api\n */\nImageArcGISRest.prototype.setUrl = function(url) {\n if (url != this.url_) {\n this.url_ = url;\n this.image_ = null;\n this.changed();\n }\n};\n\n\n/**\n * Update the user-provided params.\n * @param {Object} params Params.\n * @api\n */\nImageArcGISRest.prototype.updateParams = function(params) {\n assign(this.params_, params);\n this.image_ = null;\n this.changed();\n};\nexport default ImageArcGISRest;\n","/**\n * @module ol/source/ImageCanvas\n */\nimport {inherits} from '../util.js';\nimport ImageCanvas from '../ImageCanvas.js';\nimport {containsExtent, getHeight, getWidth, scaleFromCenter} from '../extent.js';\nimport ImageSource from '../source/Image.js';\n\n\n/**\n * A function returning the canvas element (`{HTMLCanvasElement}`)\n * used by the source as an image. The arguments passed to the function are:\n * {@link module:ol/extent~Extent} the image extent, `{number}` the image resolution,\n * `{number}` the device pixel ratio, {@link module:ol/size~Size} the image size, and\n * {@link module:ol/proj/Projection} the image projection. The canvas returned by\n * this function is cached by the source. The this keyword inside the function\n * references the {@link module:ol/source/ImageCanvas}.\n *\n * @typedef {function(this:module:ol/ImageCanvas, module:ol/extent~Extent, number,\n * number, module:ol/size~Size, module:ol/proj/Projection): HTMLCanvasElement} FunctionType\n */\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {module:ol/source/ImageCanvas~FunctionType} [canvasFunction] Canvas function.\n * The function returning the canvas element used by the source\n * as an image. The arguments passed to the function are: `{module:ol/extent~Extent}` the\n * image extent, `{number}` the image resolution, `{number}` the device pixel\n * ratio, `{module:ol/size~Size}` the image size, and `{module:ol/proj/Projection~Projection}` the image\n * projection. The canvas returned by this function is cached by the source. If\n * the value returned by the function is later changed then\n * `changed` should be called on the source for the source to\n * invalidate the current cached image. See @link: {@link module:ol/Observable~Observable#changed}\n * @property {module:ol/proj~ProjectionLike} projection Projection.\n * @property {number} [ratio=1.5] Ratio. 1 means canvases are the size of the map viewport, 2 means twice the\n * width and height of the map viewport, and so on. Must be `1` or higher.\n * @property {Array.<number>} [resolutions] Resolutions.\n * If specified, new canvases will be created for these resolutions\n * @property {module:ol/source/State} [state] Source state.\n */\n\n\n/**\n * @classdesc\n * Base class for image sources where a canvas element is the image.\n *\n * @constructor\n * @extends {module:ol/source/Image}\n * @param {module:ol/source/ImageCanvas~Options=} options ImageCanvas options.\n * @api\n */\nconst ImageCanvasSource = function(options) {\n\n ImageSource.call(this, {\n attributions: options.attributions,\n projection: options.projection,\n resolutions: options.resolutions,\n state: options.state\n });\n\n /**\n * @private\n * @type {module:ol/source/ImageCanvas~FunctionType}\n */\n this.canvasFunction_ = options.canvasFunction;\n\n /**\n * @private\n * @type {module:ol/ImageCanvas}\n */\n this.canvas_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.renderedRevision_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.ratio_ = options.ratio !== undefined ?\n options.ratio : 1.5;\n\n};\n\ninherits(ImageCanvasSource, ImageSource);\n\n\n/**\n * @inheritDoc\n */\nImageCanvasSource.prototype.getImageInternal = function(extent, resolution, pixelRatio, projection) {\n resolution = this.findNearestResolution(resolution);\n\n let canvas = this.canvas_;\n if (canvas &&\n this.renderedRevision_ == this.getRevision() &&\n canvas.getResolution() == resolution &&\n canvas.getPixelRatio() == pixelRatio &&\n containsExtent(canvas.getExtent(), extent)) {\n return canvas;\n }\n\n extent = extent.slice();\n scaleFromCenter(extent, this.ratio_);\n const width = getWidth(extent) / resolution;\n const height = getHeight(extent) / resolution;\n const size = [width * pixelRatio, height * pixelRatio];\n\n const canvasElement = this.canvasFunction_(\n extent, resolution, pixelRatio, size, projection);\n if (canvasElement) {\n canvas = new ImageCanvas(extent, resolution, pixelRatio, canvasElement);\n }\n this.canvas_ = canvas;\n this.renderedRevision_ = this.getRevision();\n\n return canvas;\n};\nexport default ImageCanvasSource;\n","/**\n * @module ol/source/ImageMapGuide\n */\nimport {inherits} from '../util.js';\nimport ImageWrapper from '../Image.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {containsExtent, getCenter, getHeight, getWidth, scaleFromCenter} from '../extent.js';\nimport {assign} from '../obj.js';\nimport ImageSource, {defaultImageLoadFunction} from '../source/Image.js';\nimport {appendParams} from '../uri.js';\n\n/**\n * @typedef {Object} Options\n * @property {string} [url] The mapagent url.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer. See\n * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.\n * @property {number} [displayDpi=96] The display resolution.\n * @property {number} [metersPerUnit=1] The meters-per-unit value.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting\n * the image from the remote server.\n * @property {boolean} [useOverlay] If `true`, will use `GETDYNAMICMAPOVERLAYIMAGE`.\n * @property {module:ol/proj~ProjectionLike} projection Projection.\n * @property {number} [ratio=1] Ratio. `1` means image requests are the size of the map viewport, `2` means\n * twice the width and height of the map viewport, and so on. Must be `1` or higher.\n * @property {Array.<number>} [resolutions] Resolutions.\n * If specified, requests will be made for these resolutions only.\n * @property {module:ol/Image~LoadFunction} [imageLoadFunction] Optional function to load an image given a URL.\n * @property {Object} [params] Additional parameters.\n */\n\n\n/**\n * @classdesc\n * Source for images from Mapguide servers\n *\n * @constructor\n * @fires ol/source/Image~ImageSourceEvent\n * @extends {module:ol/source/Image}\n * @param {module:ol/source/ImageMapGuide~Options=} options ImageMapGuide options.\n * @api\n */\nconst ImageMapGuide = function(options) {\n\n ImageSource.call(this, {\n projection: options.projection,\n resolutions: options.resolutions\n });\n\n /**\n * @private\n * @type {?string}\n */\n this.crossOrigin_ =\n options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n /**\n * @private\n * @type {number}\n */\n this.displayDpi_ = options.displayDpi !== undefined ?\n options.displayDpi : 96;\n\n /**\n * @private\n * @type {!Object}\n */\n this.params_ = options.params || {};\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.url_ = options.url;\n\n /**\n * @private\n * @type {module:ol/Image~LoadFunction}\n */\n this.imageLoadFunction_ = options.imageLoadFunction !== undefined ?\n options.imageLoadFunction : defaultImageLoadFunction;\n\n /**\n * @private\n * @type {boolean}\n */\n this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n /**\n * @private\n * @type {number}\n */\n this.metersPerUnit_ = options.metersPerUnit !== undefined ?\n options.metersPerUnit : 1;\n\n /**\n * @private\n * @type {number}\n */\n this.ratio_ = options.ratio !== undefined ? options.ratio : 1;\n\n /**\n * @private\n * @type {boolean}\n */\n this.useOverlay_ = options.useOverlay !== undefined ?\n options.useOverlay : false;\n\n /**\n * @private\n * @type {module:ol/Image}\n */\n this.image_ = null;\n\n /**\n * @private\n * @type {number}\n */\n this.renderedRevision_ = 0;\n\n};\n\ninherits(ImageMapGuide, ImageSource);\n\n\n/**\n * Get the user-provided params, i.e. those passed to the constructor through\n * the \"params\" option, and possibly updated using the updateParams method.\n * @return {Object} Params.\n * @api\n */\nImageMapGuide.prototype.getParams = function() {\n return this.params_;\n};\n\n\n/**\n * @inheritDoc\n */\nImageMapGuide.prototype.getImageInternal = function(extent, resolution, pixelRatio, projection) {\n resolution = this.findNearestResolution(resolution);\n pixelRatio = this.hidpi_ ? pixelRatio : 1;\n\n let image = this.image_;\n if (image &&\n this.renderedRevision_ == this.getRevision() &&\n image.getResolution() == resolution &&\n image.getPixelRatio() == pixelRatio &&\n containsExtent(image.getExtent(), extent)) {\n return image;\n }\n\n if (this.ratio_ != 1) {\n extent = extent.slice();\n scaleFromCenter(extent, this.ratio_);\n }\n const width = getWidth(extent) / resolution;\n const height = getHeight(extent) / resolution;\n const size = [width * pixelRatio, height * pixelRatio];\n\n if (this.url_ !== undefined) {\n const imageUrl = this.getUrl(this.url_, this.params_, extent, size,\n projection);\n image = new ImageWrapper(extent, resolution, pixelRatio,\n imageUrl, this.crossOrigin_,\n this.imageLoadFunction_);\n listen(image, EventType.CHANGE,\n this.handleImageChange, this);\n } else {\n image = null;\n }\n this.image_ = image;\n this.renderedRevision_ = this.getRevision();\n\n return image;\n};\n\n\n/**\n * Return the image load function of the source.\n * @return {module:ol/Image~LoadFunction} The image load function.\n * @api\n */\nImageMapGuide.prototype.getImageLoadFunction = function() {\n return this.imageLoadFunction_;\n};\n\n\n/**\n * @param {module:ol/extent~Extent} extent The map extents.\n * @param {module:ol/size~Size} size The viewport size.\n * @param {number} metersPerUnit The meters-per-unit value.\n * @param {number} dpi The display resolution.\n * @return {number} The computed map scale.\n */\nfunction getScale(extent, size, metersPerUnit, dpi) {\n const mcsW = getWidth(extent);\n const mcsH = getHeight(extent);\n const devW = size[0];\n const devH = size[1];\n const mpp = 0.0254 / dpi;\n if (devH * mcsW > devW * mcsH) {\n return mcsW * metersPerUnit / (devW * mpp); // width limited\n } else {\n return mcsH * metersPerUnit / (devH * mpp); // height limited\n }\n}\n\n\n/**\n * Update the user-provided params.\n * @param {Object} params Params.\n * @api\n */\nImageMapGuide.prototype.updateParams = function(params) {\n assign(this.params_, params);\n this.changed();\n};\n\n\n/**\n * @param {string} baseUrl The mapagent url.\n * @param {Object.<string, string|number>} params Request parameters.\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {module:ol/size~Size} size Size.\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {string} The mapagent map image request URL.\n */\nImageMapGuide.prototype.getUrl = function(baseUrl, params, extent, size, projection) {\n const scale = getScale(extent, size,\n this.metersPerUnit_, this.displayDpi_);\n const center = getCenter(extent);\n const baseParams = {\n 'OPERATION': this.useOverlay_ ? 'GETDYNAMICMAPOVERLAYIMAGE' : 'GETMAPIMAGE',\n 'VERSION': '2.0.0',\n 'LOCALE': 'en',\n 'CLIENTAGENT': 'ol/source/ImageMapGuide source',\n 'CLIP': '1',\n 'SETDISPLAYDPI': this.displayDpi_,\n 'SETDISPLAYWIDTH': Math.round(size[0]),\n 'SETDISPLAYHEIGHT': Math.round(size[1]),\n 'SETVIEWSCALE': scale,\n 'SETVIEWCENTERX': center[0],\n 'SETVIEWCENTERY': center[1]\n };\n assign(baseParams, params);\n return appendParams(baseUrl, baseParams);\n};\n\n\n/**\n * Set the image load function of the MapGuide source.\n * @param {module:ol/Image~LoadFunction} imageLoadFunction Image load function.\n * @api\n */\nImageMapGuide.prototype.setImageLoadFunction = function(imageLoadFunction) {\n this.image_ = null;\n this.imageLoadFunction_ = imageLoadFunction;\n this.changed();\n};\nexport default ImageMapGuide;\n","/**\n * @module ol/source/ImageStatic\n */\nimport {inherits} from '../util.js';\nimport ImageWrapper from '../Image.js';\nimport ImageState from '../ImageState.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {intersects, getHeight, getWidth} from '../extent.js';\nimport {get as getProjection} from '../proj.js';\nimport ImageSource, {defaultImageLoadFunction} from '../source/Image.js';\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer. See\n * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.\n * @property {module:ol/extent~Extent} [imageExtent] Extent of the image in map coordinates.\n * This is the [left, bottom, right, top] map coordinates of your image.\n * @property {module:ol/Image~LoadFunction} [imageLoadFunction] Optional function to load an image given a URL.\n * @property {module:ol/proj~ProjectionLike} projection Projection.\n * @property {module:ol/size~Size} [imageSize] Size of the image in pixels. Usually the image size is auto-detected, so this\n * only needs to be set if auto-detection fails for some reason.\n * @property {string} url Image URL.\n */\n\n\n/**\n * @classdesc\n * A layer source for displaying a single, static image.\n *\n * @constructor\n * @extends {module:ol/source/Image}\n * @param {module:ol/source/ImageStatic~Options=} options ImageStatic options.\n * @api\n */\nconst Static = function(options) {\n const imageExtent = options.imageExtent;\n\n const crossOrigin = options.crossOrigin !== undefined ?\n options.crossOrigin : null;\n\n const /** @type {module:ol/Image~LoadFunction} */ imageLoadFunction =\n options.imageLoadFunction !== undefined ?\n options.imageLoadFunction : defaultImageLoadFunction;\n\n ImageSource.call(this, {\n attributions: options.attributions,\n projection: getProjection(options.projection)\n });\n\n /**\n * @private\n * @type {module:ol/Image}\n */\n this.image_ = new ImageWrapper(imageExtent, undefined, 1, options.url, crossOrigin, imageLoadFunction);\n\n /**\n * @private\n * @type {module:ol/size~Size}\n */\n this.imageSize_ = options.imageSize ? options.imageSize : null;\n\n listen(this.image_, EventType.CHANGE,\n this.handleImageChange, this);\n\n};\n\ninherits(Static, ImageSource);\n\n\n/**\n * @inheritDoc\n */\nStatic.prototype.getImageInternal = function(extent, resolution, pixelRatio, projection) {\n if (intersects(extent, this.image_.getExtent())) {\n return this.image_;\n }\n return null;\n};\n\n\n/**\n * @inheritDoc\n */\nStatic.prototype.handleImageChange = function(evt) {\n if (this.image_.getState() == ImageState.LOADED) {\n const imageExtent = this.image_.getExtent();\n const image = this.image_.getImage();\n let imageWidth, imageHeight;\n if (this.imageSize_) {\n imageWidth = this.imageSize_[0];\n imageHeight = this.imageSize_[1];\n } else {\n imageWidth = image.width;\n imageHeight = image.height;\n }\n const resolution = getHeight(imageExtent) / imageHeight;\n const targetWidth = Math.ceil(getWidth(imageExtent) / resolution);\n if (targetWidth != imageWidth) {\n const context = createCanvasContext2D(targetWidth, imageHeight);\n const canvas = context.canvas;\n context.drawImage(image, 0, 0, imageWidth, imageHeight,\n 0, 0, canvas.width, canvas.height);\n this.image_.setImage(canvas);\n }\n }\n ImageSource.prototype.handleImageChange.call(this, evt);\n};\nexport default Static;\n","/**\n * Default WMS version.\n * @type {string}\n */\nexport const DEFAULT_WMS_VERSION = '1.3.0';\n","/**\n * @module ol/source/WMSServerType\n */\n\n/**\n * Available server types: `'carmentaserver'`, `'geoserver'`, `'mapserver'`,\n * `'qgis'`. These are servers that have vendor parameters beyond the WMS\n * specification that OpenLayers can make use of.\n * @enum {string}\n */\nexport default {\n CARMENTA_SERVER: 'carmentaserver',\n GEOSERVER: 'geoserver',\n MAPSERVER: 'mapserver',\n QGIS: 'qgis'\n};\n","/**\n * @module ol/source/ImageWMS\n */\n\nimport {DEFAULT_WMS_VERSION} from './common.js';\nimport {inherits} from '../util.js';\nimport ImageWrapper from '../Image.js';\nimport {assert} from '../asserts.js';\nimport {listen} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {containsExtent, getCenter, getForViewAndSize, getHeight, getWidth} from '../extent.js';\nimport {assign} from '../obj.js';\nimport {get as getProjection, transform} from '../proj.js';\nimport {calculateSourceResolution} from '../reproj.js';\nimport ImageSource, {defaultImageLoadFunction} from '../source/Image.js';\nimport WMSServerType from '../source/WMSServerType.js';\nimport {compareVersions} from '../string.js';\nimport {appendParams} from '../uri.js';\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer. See\n * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting\n * the image from the remote server.\n * @property {module:ol/source/WMSServerType|string} [serverType] The type of\n * the remote WMS server: `mapserver`, `geoserver` or `qgis`. Only needed if `hidpi` is `true`.\n * @property {module:ol/Image~LoadFunction} [imageLoadFunction] Optional function to load an image given a URL.\n * @property {Object.<string,*>} params WMS request parameters.\n * At least a `LAYERS` param is required. `STYLES` is\n * `''` by default. `VERSION` is `1.3.0` by default. `WIDTH`, `HEIGHT`, `BBOX`\n * and `CRS` (`SRS` for WMS version < 1.3.0) will be set dynamically.\n * @property {module:ol/proj~ProjectionLike} projection Projection.\n * @property {number} [ratio=1.5] Ratio. `1` means image requests are the size of the map viewport, `2` means\n * twice the width and height of the map viewport, and so on. Must be `1` or\n * higher.\n * @property {Array.<number>} [resolutions] Resolutions.\n * If specified, requests will be made for these resolutions only.\n * @property {string} url WMS service URL.\n */\n\n\n/**\n * @classdesc\n * Source for WMS servers providing single, untiled images.\n *\n * @constructor\n * @fires ol/source/Image~ImageSourceEvent\n * @extends {module:ol/source/Image}\n * @param {module:ol/source/ImageWMS~Options=} [opt_options] ImageWMS options.\n * @api\n */\nconst ImageWMS = function(opt_options) {\n\n const options = opt_options || {};\n\n ImageSource.call(this, {\n attributions: options.attributions,\n projection: options.projection,\n resolutions: options.resolutions\n });\n\n /**\n * @private\n * @type {?string}\n */\n this.crossOrigin_ =\n options.crossOrigin !== undefined ? options.crossOrigin : null;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.url_ = options.url;\n\n /**\n * @private\n * @type {module:ol/Image~LoadFunction}\n */\n this.imageLoadFunction_ = options.imageLoadFunction !== undefined ?\n options.imageLoadFunction : defaultImageLoadFunction;\n\n /**\n * @private\n * @type {!Object}\n */\n this.params_ = options.params || {};\n\n /**\n * @private\n * @type {boolean}\n */\n this.v13_ = true;\n this.updateV13_();\n\n /**\n * @private\n * @type {module:ol/source/WMSServerType|undefined}\n */\n this.serverType_ = /** @type {module:ol/source/WMSServerType|undefined} */ (options.serverType);\n\n /**\n * @private\n * @type {boolean}\n */\n this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n /**\n * @private\n * @type {module:ol/Image}\n */\n this.image_ = null;\n\n /**\n * @private\n * @type {module:ol/size~Size}\n */\n this.imageSize_ = [0, 0];\n\n /**\n * @private\n * @type {number}\n */\n this.renderedRevision_ = 0;\n\n /**\n * @private\n * @type {number}\n */\n this.ratio_ = options.ratio !== undefined ? options.ratio : 1.5;\n\n};\n\ninherits(ImageWMS, ImageSource);\n\n\n/**\n * @const\n * @type {module:ol/size~Size}\n */\nconst GETFEATUREINFO_IMAGE_SIZE = [101, 101];\n\n\n/**\n * Return the GetFeatureInfo URL for the passed coordinate, resolution, and\n * projection. Return `undefined` if the GetFeatureInfo URL cannot be\n * constructed.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {number} resolution Resolution.\n * @param {module:ol/proj~ProjectionLike} projection Projection.\n * @param {!Object} params GetFeatureInfo params. `INFO_FORMAT` at least should\n * be provided. If `QUERY_LAYERS` is not provided then the layers specified\n * in the `LAYERS` parameter will be used. `VERSION` should not be\n * specified here.\n * @return {string|undefined} GetFeatureInfo URL.\n * @api\n */\nImageWMS.prototype.getGetFeatureInfoUrl = function(coordinate, resolution, projection, params) {\n if (this.url_ === undefined) {\n return undefined;\n }\n const projectionObj = getProjection(projection);\n const sourceProjectionObj = this.getProjection();\n\n if (sourceProjectionObj && sourceProjectionObj !== projectionObj) {\n resolution = calculateSourceResolution(sourceProjectionObj, projectionObj, coordinate, resolution);\n coordinate = transform(coordinate, projectionObj, sourceProjectionObj);\n }\n\n const extent = getForViewAndSize(coordinate, resolution, 0,\n GETFEATUREINFO_IMAGE_SIZE);\n\n const baseParams = {\n 'SERVICE': 'WMS',\n 'VERSION': DEFAULT_WMS_VERSION,\n 'REQUEST': 'GetFeatureInfo',\n 'FORMAT': 'image/png',\n 'TRANSPARENT': true,\n 'QUERY_LAYERS': this.params_['LAYERS']\n };\n assign(baseParams, this.params_, params);\n\n const x = Math.floor((coordinate[0] - extent[0]) / resolution);\n const y = Math.floor((extent[3] - coordinate[1]) / resolution);\n baseParams[this.v13_ ? 'I' : 'X'] = x;\n baseParams[this.v13_ ? 'J' : 'Y'] = y;\n\n return this.getRequestUrl_(\n extent, GETFEATUREINFO_IMAGE_SIZE,\n 1, sourceProjectionObj || projectionObj, baseParams);\n};\n\n\n/**\n * Get the user-provided params, i.e. those passed to the constructor through\n * the \"params\" option, and possibly updated using the updateParams method.\n * @return {Object} Params.\n * @api\n */\nImageWMS.prototype.getParams = function() {\n return this.params_;\n};\n\n\n/**\n * @inheritDoc\n */\nImageWMS.prototype.getImageInternal = function(extent, resolution, pixelRatio, projection) {\n\n if (this.url_ === undefined) {\n return null;\n }\n\n resolution = this.findNearestResolution(resolution);\n\n if (pixelRatio != 1 && (!this.hidpi_ || this.serverType_ === undefined)) {\n pixelRatio = 1;\n }\n\n const imageResolution = resolution / pixelRatio;\n\n const center = getCenter(extent);\n const viewWidth = Math.ceil(getWidth(extent) / imageResolution);\n const viewHeight = Math.ceil(getHeight(extent) / imageResolution);\n const viewExtent = getForViewAndSize(center, imageResolution, 0,\n [viewWidth, viewHeight]);\n const requestWidth = Math.ceil(this.ratio_ * getWidth(extent) / imageResolution);\n const requestHeight = Math.ceil(this.ratio_ * getHeight(extent) / imageResolution);\n const requestExtent = getForViewAndSize(center, imageResolution, 0,\n [requestWidth, requestHeight]);\n\n const image = this.image_;\n if (image &&\n this.renderedRevision_ == this.getRevision() &&\n image.getResolution() == resolution &&\n image.getPixelRatio() == pixelRatio &&\n containsExtent(image.getExtent(), viewExtent)) {\n return image;\n }\n\n const params = {\n 'SERVICE': 'WMS',\n 'VERSION': DEFAULT_WMS_VERSION,\n 'REQUEST': 'GetMap',\n 'FORMAT': 'image/png',\n 'TRANSPARENT': true\n };\n assign(params, this.params_);\n\n this.imageSize_[0] = Math.round(getWidth(requestExtent) / imageResolution);\n this.imageSize_[1] = Math.round(getHeight(requestExtent) / imageResolution);\n\n const url = this.getRequestUrl_(requestExtent, this.imageSize_, pixelRatio,\n projection, params);\n\n this.image_ = new ImageWrapper(requestExtent, resolution, pixelRatio,\n url, this.crossOrigin_, this.imageLoadFunction_);\n\n this.renderedRevision_ = this.getRevision();\n\n listen(this.image_, EventType.CHANGE,\n this.handleImageChange, this);\n\n return this.image_;\n\n};\n\n\n/**\n * Return the image load function of the source.\n * @return {module:ol/Image~LoadFunction} The image load function.\n * @api\n */\nImageWMS.prototype.getImageLoadFunction = function() {\n return this.imageLoadFunction_;\n};\n\n\n/**\n * @param {module:ol/extent~Extent} extent Extent.\n * @param {module:ol/size~Size} size Size.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @param {Object} params Params.\n * @return {string} Request URL.\n * @private\n */\nImageWMS.prototype.getRequestUrl_ = function(extent, size, pixelRatio, projection, params) {\n\n assert(this.url_ !== undefined, 9); // `url` must be configured or set using `#setUrl()`\n\n params[this.v13_ ? 'CRS' : 'SRS'] = projection.getCode();\n\n if (!('STYLES' in this.params_)) {\n params['STYLES'] = '';\n }\n\n if (pixelRatio != 1) {\n switch (this.serverType_) {\n case WMSServerType.GEOSERVER:\n const dpi = (90 * pixelRatio + 0.5) | 0;\n if ('FORMAT_OPTIONS' in params) {\n params['FORMAT_OPTIONS'] += ';dpi:' + dpi;\n } else {\n params['FORMAT_OPTIONS'] = 'dpi:' + dpi;\n }\n break;\n case WMSServerType.MAPSERVER:\n params['MAP_RESOLUTION'] = 90 * pixelRatio;\n break;\n case WMSServerType.CARMENTA_SERVER:\n case WMSServerType.QGIS:\n params['DPI'] = 90 * pixelRatio;\n break;\n default:\n assert(false, 8); // Unknown `serverType` configured\n break;\n }\n }\n\n params['WIDTH'] = size[0];\n params['HEIGHT'] = size[1];\n\n const axisOrientation = projection.getAxisOrientation();\n let bbox;\n if (this.v13_ && axisOrientation.substr(0, 2) == 'ne') {\n bbox = [extent[1], extent[0], extent[3], extent[2]];\n } else {\n bbox = extent;\n }\n params['BBOX'] = bbox.join(',');\n\n return appendParams(/** @type {string} */ (this.url_), params);\n};\n\n\n/**\n * Return the URL used for this WMS source.\n * @return {string|undefined} URL.\n * @api\n */\nImageWMS.prototype.getUrl = function() {\n return this.url_;\n};\n\n\n/**\n * Set the image load function of the source.\n * @param {module:ol/Image~LoadFunction} imageLoadFunction Image load function.\n * @api\n */\nImageWMS.prototype.setImageLoadFunction = function(imageLoadFunction) {\n this.image_ = null;\n this.imageLoadFunction_ = imageLoadFunction;\n this.changed();\n};\n\n\n/**\n * Set the URL to use for requests.\n * @param {string|undefined} url URL.\n * @api\n */\nImageWMS.prototype.setUrl = function(url) {\n if (url != this.url_) {\n this.url_ = url;\n this.image_ = null;\n this.changed();\n }\n};\n\n\n/**\n * Update the user-provided params.\n * @param {Object} params Params.\n * @api\n */\nImageWMS.prototype.updateParams = function(params) {\n assign(this.params_, params);\n this.updateV13_();\n this.image_ = null;\n this.changed();\n};\n\n\n/**\n * @private\n */\nImageWMS.prototype.updateV13_ = function() {\n const version = this.params_['VERSION'] || DEFAULT_WMS_VERSION;\n this.v13_ = compareVersions(version, '1.3') >= 0;\n};\nexport default ImageWMS;\n","/**\n * @module ol/source/OSM\n */\nimport {inherits} from '../util.js';\nimport XYZ from '../source/XYZ.js';\n\n\n/**\n * The attribution containing a link to the OpenStreetMap Copyright and License\n * page.\n * @const\n * @type {string}\n * @api\n */\nexport const ATTRIBUTION = '© ' +\n '<a href=\"https://www.openstreetmap.org/copyright\">OpenStreetMap</a> ' +\n 'contributors.';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer. See\n * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.\n * @property {number} [maxZoom=19] Max zoom.\n * @property {boolean} [opaque=true] Whether the layer is opaque.\n * @property {number} [reprojectionErrorThreshold=1.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {module:ol/Tile~LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {string} [url='https://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png'] URL template.\n * Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n */\n\n\n/**\n * @classdesc\n * Layer source for the OpenStreetMap tile server.\n *\n * @constructor\n * @extends {module:ol/source/XYZ}\n * @param {module:ol/source/OSM~Options=} [opt_options] Open Street Map options.\n * @api\n */\nconst OSM = function(opt_options) {\n\n const options = opt_options || {};\n\n let attributions;\n if (options.attributions !== undefined) {\n attributions = options.attributions;\n } else {\n attributions = [ATTRIBUTION];\n }\n\n const crossOrigin = options.crossOrigin !== undefined ?\n options.crossOrigin : 'anonymous';\n\n const url = options.url !== undefined ?\n options.url : 'https://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png';\n\n XYZ.call(this, {\n attributions: attributions,\n cacheSize: options.cacheSize,\n crossOrigin: crossOrigin,\n opaque: options.opaque !== undefined ? options.opaque : true,\n maxZoom: options.maxZoom !== undefined ? options.maxZoom : 19,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileLoadFunction: options.tileLoadFunction,\n url: url,\n wrapX: options.wrapX\n });\n\n};\n\ninherits(OSM, XYZ);\n\nexport default OSM;\n","var hasImageData = true;\ntry {\n new ImageData(10, 10);\n} catch (_) {\n hasImageData = false;\n}\n\nvar context = document.createElement('canvas').getContext('2d');\n\nfunction newImageData(data, width, height) {\n if (hasImageData) {\n return new ImageData(data, width, height);\n } else {\n var imageData = context.createImageData(width, height);\n imageData.data.set(data);\n return imageData;\n }\n}\n\nexports.newImageData = newImageData;\n","var newImageData = require('./util').newImageData;\n\n/**\n * Create a function for running operations. This function is serialized for\n * use in a worker.\n * @param {function(Array, Object):*} operation The operation.\n * @return {function(Object):ArrayBuffer} A function that takes an object with\n * buffers, meta, imageOps, width, and height properties and returns an array\n * buffer.\n */\nfunction createMinion(operation) {\n var workerHasImageData = true;\n try {\n new ImageData(10, 10);\n } catch (_) {\n workerHasImageData = false;\n }\n\n function newWorkerImageData(data, width, height) {\n if (workerHasImageData) {\n return new ImageData(data, width, height);\n } else {\n return {data: data, width: width, height: height};\n }\n }\n\n return function(data) {\n // bracket notation for minification support\n var buffers = data['buffers'];\n var meta = data['meta'];\n var imageOps = data['imageOps'];\n var width = data['width'];\n var height = data['height'];\n\n var numBuffers = buffers.length;\n var numBytes = buffers[0].byteLength;\n var output, b;\n\n if (imageOps) {\n var images = new Array(numBuffers);\n for (b = 0; b < numBuffers; ++b) {\n images[b] = newWorkerImageData(\n new Uint8ClampedArray(buffers[b]), width, height);\n }\n output = operation(images, meta).data;\n } else {\n output = new Uint8ClampedArray(numBytes);\n var arrays = new Array(numBuffers);\n var pixels = new Array(numBuffers);\n for (b = 0; b < numBuffers; ++b) {\n arrays[b] = new Uint8ClampedArray(buffers[b]);\n pixels[b] = [0, 0, 0, 0];\n }\n for (var i = 0; i < numBytes; i += 4) {\n for (var j = 0; j < numBuffers; ++j) {\n var array = arrays[j];\n pixels[j][0] = array[i];\n pixels[j][1] = array[i + 1];\n pixels[j][2] = array[i + 2];\n pixels[j][3] = array[i + 3];\n }\n var pixel = operation(pixels, meta);\n output[i] = pixel[0];\n output[i + 1] = pixel[1];\n output[i + 2] = pixel[2];\n output[i + 3] = pixel[3];\n }\n }\n return output.buffer;\n };\n}\n\n/**\n * Create a worker for running operations.\n * @param {Object} config Configuration.\n * @param {function(MessageEvent)} onMessage Called with a message event.\n * @return {Worker} The worker.\n */\nfunction createWorker(config, onMessage) {\n var lib = Object.keys(config.lib || {}).map(function(name) {\n return 'var ' + name + ' = ' + config.lib[name].toString() + ';';\n });\n\n var lines = lib.concat([\n 'var __minion__ = (' + createMinion.toString() + ')(', config.operation.toString(), ');',\n 'self.addEventListener(\"message\", function(event) {',\n ' var buffer = __minion__(event.data);',\n ' self.postMessage({buffer: buffer, meta: event.data.meta}, [buffer]);',\n '});'\n ]);\n\n var blob = new Blob(lines, {type: 'text/javascript'});\n var source = URL.createObjectURL(blob);\n var worker = new Worker(source);\n worker.addEventListener('message', onMessage);\n return worker;\n}\n\n/**\n * Create a faux worker for running operations.\n * @param {Object} config Configuration.\n * @param {function(MessageEvent)} onMessage Called with a message event.\n * @return {Object} The faux worker.\n */\nfunction createFauxWorker(config, onMessage) {\n var minion = createMinion(config.operation);\n return {\n postMessage: function(data) {\n setTimeout(function() {\n onMessage({'data': {'buffer': minion(data), 'meta': data['meta']}});\n }, 0);\n }\n };\n}\n\n/**\n * A processor runs pixel or image operations in workers.\n * @param {Object} config Configuration.\n */\nfunction Processor(config) {\n this._imageOps = !!config.imageOps;\n var threads;\n if (config.threads === 0) {\n threads = 0;\n } else if (this._imageOps) {\n threads = 1;\n } else {\n threads = config.threads || 1;\n }\n var workers = [];\n if (threads) {\n for (var i = 0; i < threads; ++i) {\n workers[i] = createWorker(config, this._onWorkerMessage.bind(this, i));\n }\n } else {\n workers[0] = createFauxWorker(config, this._onWorkerMessage.bind(this, 0));\n }\n this._workers = workers;\n this._queue = [];\n this._maxQueueLength = config.queue || Infinity;\n this._running = 0;\n this._dataLookup = {};\n this._job = null;\n}\n\n/**\n * Run operation on input data.\n * @param {Array.<Array|ImageData>} inputs Array of pixels or image data\n * (depending on the operation type).\n * @param {Object} meta A user data object. This is passed to all operations\n * and must be serializable.\n * @param {function(Error, ImageData, Object)} callback Called when work\n * completes. The first argument is any error. The second is the ImageData\n * generated by operations. The third is the user data object.\n */\nProcessor.prototype.process = function(inputs, meta, callback) {\n this._enqueue({\n inputs: inputs,\n meta: meta,\n callback: callback\n });\n this._dispatch();\n};\n\n/**\n * Stop responding to any completed work and destroy the processor.\n */\nProcessor.prototype.destroy = function() {\n for (var key in this) {\n this[key] = null;\n }\n this._destroyed = true;\n};\n\n/**\n * Add a job to the queue.\n * @param {Object} job The job.\n */\nProcessor.prototype._enqueue = function(job) {\n this._queue.push(job);\n while (this._queue.length > this._maxQueueLength) {\n this._queue.shift().callback(null, null);\n }\n};\n\n/**\n * Dispatch a job.\n */\nProcessor.prototype._dispatch = function() {\n if (this._running === 0 && this._queue.length > 0) {\n var job = this._job = this._queue.shift();\n var width = job.inputs[0].width;\n var height = job.inputs[0].height;\n var buffers = job.inputs.map(function(input) {\n return input.data.buffer;\n });\n var threads = this._workers.length;\n this._running = threads;\n if (threads === 1) {\n this._workers[0].postMessage({\n 'buffers': buffers,\n 'meta': job.meta,\n 'imageOps': this._imageOps,\n 'width': width,\n 'height': height\n }, buffers);\n } else {\n var length = job.inputs[0].data.length;\n var segmentLength = 4 * Math.ceil(length / 4 / threads);\n for (var i = 0; i < threads; ++i) {\n var offset = i * segmentLength;\n var slices = [];\n for (var j = 0, jj = buffers.length; j < jj; ++j) {\n slices.push(buffers[i].slice(offset, offset + segmentLength));\n }\n this._workers[i].postMessage({\n 'buffers': slices,\n 'meta': job.meta,\n 'imageOps': this._imageOps,\n 'width': width,\n 'height': height\n }, slices);\n }\n }\n }\n};\n\n/**\n * Handle messages from the worker.\n * @param {number} index The worker index.\n * @param {MessageEvent} event The message event.\n */\nProcessor.prototype._onWorkerMessage = function(index, event) {\n if (this._destroyed) {\n return;\n }\n this._dataLookup[index] = event.data;\n --this._running;\n if (this._running === 0) {\n this._resolveJob();\n }\n};\n\n/**\n * Resolve a job. If there are no more worker threads, the processor callback\n * will be called.\n */\nProcessor.prototype._resolveJob = function() {\n var job = this._job;\n var threads = this._workers.length;\n var data, meta;\n if (threads === 1) {\n data = new Uint8ClampedArray(this._dataLookup[0]['buffer']);\n meta = this._dataLookup[0]['meta'];\n } else {\n var length = job.inputs[0].data.length;\n data = new Uint8ClampedArray(length);\n meta = new Array(length);\n var segmentLength = 4 * Math.ceil(length / 4 / threads);\n for (var i = 0; i < threads; ++i) {\n var buffer = this._dataLookup[i]['buffer'];\n var offset = i * segmentLength;\n data.set(new Uint8ClampedArray(buffer), offset);\n meta[i] = this._dataLookup[i]['meta'];\n }\n }\n this._job = null;\n this._dataLookup = {};\n job.callback(null,\n newImageData(data, job.inputs[0].width, job.inputs[0].height), meta);\n this._dispatch();\n};\n\nmodule.exports = Processor;\n","/**\n * @module ol/source/Raster\n */\nimport {getUid, inherits} from '../util.js';\nimport ImageCanvas from '../ImageCanvas.js';\nimport TileQueue from '../TileQueue.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {listen} from '../events.js';\nimport Event from '../events/Event.js';\nimport EventType from '../events/EventType.js';\nimport {Processor} from 'pixelworks/lib/index';\nimport {equals, getCenter, getHeight, getWidth} from '../extent.js';\nimport LayerType from '../LayerType.js';\nimport Layer from '../layer/Layer.js';\nimport ImageLayer from '../layer/Image.js';\nimport TileLayer from '../layer/Tile.js';\nimport {assign} from '../obj.js';\nimport CanvasImageLayerRenderer from '../renderer/canvas/ImageLayer.js';\nimport CanvasTileLayerRenderer from '../renderer/canvas/TileLayer.js';\nimport ImageSource from '../source/Image.js';\nimport SourceState from '../source/State.js';\nimport TileSource from '../source/Tile.js';\nimport {create as createTransform} from '../transform.js';\n\n\n/**\n * A function that takes an array of input data, performs some operation, and\n * returns an array of output data.\n * For `pixel` type operations, the function will be called with an array of\n * pixels, where each pixel is an array of four numbers (`[r, g, b, a]`) in the\n * range of 0 - 255. It should return a single pixel array.\n * For `'image'` type operations, functions will be called with an array of\n * {@link ImageData https://developer.mozilla.org/en-US/docs/Web/API/ImageData}\n * and should return a single {@link ImageData\n * https://developer.mozilla.org/en-US/docs/Web/API/ImageData}. The operations\n * are called with a second \"data\" argument, which can be used for storage. The\n * data object is accessible from raster events, where it can be initialized in\n * \"beforeoperations\" and accessed again in \"afteroperations\".\n *\n * @typedef {function((Array.<Array.<number>>|Array.<ImageData>), Object):\n * (Array.<number>|ImageData)} Operation\n */\n\n\n/**\n * @enum {string}\n */\nconst RasterEventType = {\n /**\n * Triggered before operations are run.\n * @event ol/source/Raster~RasterSourceEvent#beforeoperations\n * @api\n */\n BEFOREOPERATIONS: 'beforeoperations',\n\n /**\n * Triggered after operations are run.\n * @event ol/source/Raster~RasterSourceEvent#afteroperations\n * @api\n */\n AFTEROPERATIONS: 'afteroperations'\n};\n\n\n/**\n * Raster operation type. Supported values are `'pixel'` and `'image'`.\n * @enum {string}\n */\nconst RasterOperationType = {\n PIXEL: 'pixel',\n IMAGE: 'image'\n};\n\n\n/**\n * @classdesc\n * Events emitted by {@link module:ol/source/Raster} instances are instances of this\n * type.\n *\n * @constructor\n * @extends {module:ol/events/Event}\n * @param {string} type Type.\n * @param {module:ol/PluggableMap~FrameState} frameState The frame state.\n * @param {Object} data An object made available to operations.\n */\nconst RasterSourceEvent = function(type, frameState, data) {\n Event.call(this, type);\n\n /**\n * The raster extent.\n * @type {module:ol/extent~Extent}\n * @api\n */\n this.extent = frameState.extent;\n\n /**\n * The pixel resolution (map units per pixel).\n * @type {number}\n * @api\n */\n this.resolution = frameState.viewState.resolution / frameState.pixelRatio;\n\n /**\n * An object made available to all operations. This can be used by operations\n * as a storage object (e.g. for calculating statistics).\n * @type {Object}\n * @api\n */\n this.data = data;\n\n};\ninherits(RasterSourceEvent, Event);\n\n/**\n * @typedef {Object} Options\n * @property {Array.<module:ol/source/Source|module:ol/layer/Layer>} sources Input\n * sources or layers. Vector layers must be configured with `renderMode: 'image'`.\n * @property {module:ol/source/Raster~Operation} [operation] Raster operation.\n * The operation will be called with data from input sources\n * and the output will be assigned to the raster source.\n * @property {Object} [lib] Functions that will be made available to operations run in a worker.\n * @property {number} [threads] By default, operations will be run in a single worker thread.\n * To avoid using workers altogether, set `threads: 0`. For pixel operations, operations can\n * be run in multiple worker threads. Note that there is additional overhead in\n * transferring data to multiple workers, and that depending on the user's\n * system, it may not be possible to parallelize the work.\n * @property {module:ol/source/Raster~RasterOperationType} [operationType='pixel'] Operation type.\n * Supported values are `'pixel'` and `'image'`. By default,\n * `'pixel'` operations are assumed, and operations will be called with an\n * array of pixels from input sources. If set to `'image'`, operations will\n * be called with an array of ImageData objects from input sources.\n */\n\n\n/**\n * @classdesc\n * A source that transforms data from any number of input sources using an\n * {@link module:ol/source/Raster~Operation} function to transform input pixel values into\n * output pixel values.\n *\n * @constructor\n * @extends {module:ol/source/Image}\n * @fires ol/source/Raster~RasterSourceEvent\n * @param {module:ol/source/Raster~Options=} options Options.\n * @api\n */\nconst RasterSource = function(options) {\n\n /**\n * @private\n * @type {*}\n */\n this.worker_ = null;\n\n /**\n * @private\n * @type {module:ol/source/Raster~RasterOperationType}\n */\n this.operationType_ = options.operationType !== undefined ?\n options.operationType : RasterOperationType.PIXEL;\n\n /**\n * @private\n * @type {number}\n */\n this.threads_ = options.threads !== undefined ? options.threads : 1;\n\n /**\n * @private\n * @type {Array.<module:ol/renderer/canvas/Layer>}\n */\n this.renderers_ = createRenderers(options.sources);\n\n for (let r = 0, rr = this.renderers_.length; r < rr; ++r) {\n listen(this.renderers_[r], EventType.CHANGE,\n this.changed, this);\n }\n\n /**\n * @private\n * @type {module:ol/TileQueue}\n */\n this.tileQueue_ = new TileQueue(\n function() {\n return 1;\n },\n this.changed.bind(this));\n\n const layerStatesArray = getLayerStatesArray(this.renderers_);\n const layerStates = {};\n for (let i = 0, ii = layerStatesArray.length; i < ii; ++i) {\n layerStates[getUid(layerStatesArray[i].layer)] = layerStatesArray[i];\n }\n\n /**\n * The most recently requested frame state.\n * @type {module:ol/PluggableMap~FrameState}\n * @private\n */\n this.requestedFrameState_;\n\n /**\n * The most recently rendered image canvas.\n * @type {module:ol/ImageCanvas}\n * @private\n */\n this.renderedImageCanvas_ = null;\n\n /**\n * The most recently rendered revision.\n * @type {number}\n */\n this.renderedRevision_;\n\n /**\n * @private\n * @type {module:ol/PluggableMap~FrameState}\n */\n this.frameState_ = {\n animate: false,\n coordinateToPixelTransform: createTransform(),\n extent: null,\n focus: null,\n index: 0,\n layerStates: layerStates,\n layerStatesArray: layerStatesArray,\n pixelRatio: 1,\n pixelToCoordinateTransform: createTransform(),\n postRenderFunctions: [],\n size: [0, 0],\n skippedFeatureUids: {},\n tileQueue: this.tileQueue_,\n time: Date.now(),\n usedTiles: {},\n viewState: /** @type {module:ol/View~State} */ ({\n rotation: 0\n }),\n viewHints: [],\n wantedTiles: {}\n };\n\n ImageSource.call(this, {});\n\n if (options.operation !== undefined) {\n this.setOperation(options.operation, options.lib);\n }\n\n};\n\ninherits(RasterSource, ImageSource);\n\n\n/**\n * Set the operation.\n * @param {module:ol/source/Raster~Operation} operation New operation.\n * @param {Object=} opt_lib Functions that will be available to operations run\n * in a worker.\n * @api\n */\nRasterSource.prototype.setOperation = function(operation, opt_lib) {\n this.worker_ = new Processor({\n operation: operation,\n imageOps: this.operationType_ === RasterOperationType.IMAGE,\n queue: 1,\n lib: opt_lib,\n threads: this.threads_\n });\n this.changed();\n};\n\n\n/**\n * Update the stored frame state.\n * @param {module:ol/extent~Extent} extent The view extent (in map units).\n * @param {number} resolution The view resolution.\n * @param {module:ol/proj/Projection} projection The view projection.\n * @return {module:ol/PluggableMap~FrameState} The updated frame state.\n * @private\n */\nRasterSource.prototype.updateFrameState_ = function(extent, resolution, projection) {\n\n const frameState = /** @type {module:ol/PluggableMap~FrameState} */ (assign({}, this.frameState_));\n\n frameState.viewState = /** @type {module:ol/View~State} */ (assign({}, frameState.viewState));\n\n const center = getCenter(extent);\n\n frameState.extent = extent.slice();\n frameState.focus = center;\n frameState.size[0] = Math.round(getWidth(extent) / resolution);\n frameState.size[1] = Math.round(getHeight(extent) / resolution);\n frameState.time = Date.now();\n frameState.animate = false;\n\n const viewState = frameState.viewState;\n viewState.center = center;\n viewState.projection = projection;\n viewState.resolution = resolution;\n return frameState;\n};\n\n\n/**\n * Determine if all sources are ready.\n * @return {boolean} All sources are ready.\n * @private\n */\nRasterSource.prototype.allSourcesReady_ = function() {\n let ready = true;\n let source;\n for (let i = 0, ii = this.renderers_.length; i < ii; ++i) {\n source = this.renderers_[i].getLayer().getSource();\n if (source.getState() !== SourceState.READY) {\n ready = false;\n break;\n }\n }\n return ready;\n};\n\n\n/**\n * @inheritDoc\n */\nRasterSource.prototype.getImage = function(extent, resolution, pixelRatio, projection) {\n if (!this.allSourcesReady_()) {\n return null;\n }\n\n const frameState = this.updateFrameState_(extent, resolution, projection);\n this.requestedFrameState_ = frameState;\n\n // check if we can't reuse the existing ol/ImageCanvas\n if (this.renderedImageCanvas_) {\n const renderedResolution = this.renderedImageCanvas_.getResolution();\n const renderedExtent = this.renderedImageCanvas_.getExtent();\n if (resolution !== renderedResolution || !equals(extent, renderedExtent)) {\n this.renderedImageCanvas_ = null;\n }\n }\n\n if (!this.renderedImageCanvas_ || this.getRevision() !== this.renderedRevision_) {\n this.processSources_();\n }\n\n frameState.tileQueue.loadMoreTiles(16, 16);\n\n if (frameState.animate) {\n requestAnimationFrame(this.changed.bind(this));\n }\n\n return this.renderedImageCanvas_;\n};\n\n\n/**\n * Start processing source data.\n * @private\n */\nRasterSource.prototype.processSources_ = function() {\n const frameState = this.requestedFrameState_;\n const len = this.renderers_.length;\n const imageDatas = new Array(len);\n for (let i = 0; i < len; ++i) {\n const imageData = getImageData(\n this.renderers_[i], frameState, frameState.layerStatesArray[i]);\n if (imageData) {\n imageDatas[i] = imageData;\n } else {\n return;\n }\n }\n\n const data = {};\n this.dispatchEvent(new RasterSourceEvent(RasterEventType.BEFOREOPERATIONS, frameState, data));\n this.worker_.process(imageDatas, data, this.onWorkerComplete_.bind(this, frameState));\n};\n\n\n/**\n * Called when pixel processing is complete.\n * @param {module:ol/PluggableMap~FrameState} frameState The frame state.\n * @param {Error} err Any error during processing.\n * @param {ImageData} output The output image data.\n * @param {Object} data The user data.\n * @private\n */\nRasterSource.prototype.onWorkerComplete_ = function(frameState, err, output, data) {\n if (err || !output) {\n return;\n }\n\n // do nothing if extent or resolution changed\n const extent = frameState.extent;\n const resolution = frameState.viewState.resolution;\n if (resolution !== this.requestedFrameState_.viewState.resolution ||\n !equals(extent, this.requestedFrameState_.extent)) {\n return;\n }\n\n let context;\n if (this.renderedImageCanvas_) {\n context = this.renderedImageCanvas_.getImage().getContext('2d');\n } else {\n const width = Math.round(getWidth(extent) / resolution);\n const height = Math.round(getHeight(extent) / resolution);\n context = createCanvasContext2D(width, height);\n this.renderedImageCanvas_ = new ImageCanvas(extent, resolution, 1, context.canvas);\n }\n context.putImageData(output, 0, 0);\n\n this.changed();\n this.renderedRevision_ = this.getRevision();\n\n this.dispatchEvent(new RasterSourceEvent(RasterEventType.AFTEROPERATIONS, frameState, data));\n};\n\n\n/**\n * A reusable canvas context.\n * @type {CanvasRenderingContext2D}\n * @private\n */\nlet sharedContext = null;\n\n\n/**\n * Get image data from a renderer.\n * @param {module:ol/renderer/canvas/Layer} renderer Layer renderer.\n * @param {module:ol/PluggableMap~FrameState} frameState The frame state.\n * @param {module:ol/layer/Layer~State} layerState The layer state.\n * @return {ImageData} The image data.\n */\nfunction getImageData(renderer, frameState, layerState) {\n if (!renderer.prepareFrame(frameState, layerState)) {\n return null;\n }\n const width = frameState.size[0];\n const height = frameState.size[1];\n if (!sharedContext) {\n sharedContext = createCanvasContext2D(width, height);\n } else {\n const canvas = sharedContext.canvas;\n if (canvas.width !== width || canvas.height !== height) {\n sharedContext = createCanvasContext2D(width, height);\n } else {\n sharedContext.clearRect(0, 0, width, height);\n }\n }\n renderer.composeFrame(frameState, layerState, sharedContext);\n return sharedContext.getImageData(0, 0, width, height);\n}\n\n\n/**\n * Get a list of layer states from a list of renderers.\n * @param {Array.<module:ol/renderer/canvas/Layer>} renderers Layer renderers.\n * @return {Array.<module:ol/layer/Layer~State>} The layer states.\n */\nfunction getLayerStatesArray(renderers) {\n return renderers.map(function(renderer) {\n return renderer.getLayer().getLayerState();\n });\n}\n\n\n/**\n * Create renderers for all sources.\n * @param {Array.<module:ol/source/Source>} sources The sources.\n * @return {Array.<module:ol/renderer/canvas/Layer>} Array of layer renderers.\n */\nfunction createRenderers(sources) {\n const len = sources.length;\n const renderers = new Array(len);\n for (let i = 0; i < len; ++i) {\n renderers[i] = createRenderer(sources[i]);\n }\n return renderers;\n}\n\n\n/**\n * Create a renderer for the provided source.\n * @param {module:ol/source/Source} source The source.\n * @return {module:ol/renderer/canvas/Layer} The renderer.\n */\nfunction createRenderer(source) {\n let renderer = null;\n if (source instanceof TileSource) {\n renderer = createTileRenderer(source);\n } else if (source instanceof ImageSource) {\n renderer = createImageRenderer(source);\n } else if (source instanceof TileLayer) {\n renderer = new CanvasTileLayerRenderer(source);\n } else if (source instanceof Layer &&\n (source.getType() == LayerType.IMAGE || source.getType() == LayerType.VECTOR)) {\n renderer = new CanvasImageLayerRenderer(source);\n }\n return renderer;\n}\n\n\n/**\n * Create an image renderer for the provided source.\n * @param {module:ol/source/Image} source The source.\n * @return {module:ol/renderer/canvas/Layer} The renderer.\n */\nfunction createImageRenderer(source) {\n const layer = new ImageLayer({source: source});\n return new CanvasImageLayerRenderer(layer);\n}\n\n\n/**\n * Create a tile renderer for the provided source.\n * @param {module:ol/source/Tile} source The source.\n * @return {module:ol/renderer/canvas/Layer} The renderer.\n */\nfunction createTileRenderer(source) {\n const layer = new TileLayer({source: source});\n return new CanvasTileLayerRenderer(layer);\n}\n\n\n/**\n * @override\n */\nRasterSource.prototype.getImageInternal = function() {\n return null; // not implemented\n};\n\n\nexport default RasterSource;\n","/**\n * @module ol/source/Stamen\n */\nimport {inherits} from '../util.js';\nimport {ATTRIBUTION as OSM_ATTRIBUTION} from '../source/OSM.js';\nimport XYZ from '../source/XYZ.js';\n\n\n/**\n * @const\n * @type {Array.<string>}\n */\nconst ATTRIBUTIONS = [\n 'Map tiles by <a href=\"https://stamen.com/\">Stamen Design</a>, ' +\n 'under <a href=\"https://creativecommons.org/licenses/by/3.0/\">CC BY' +\n ' 3.0</a>.',\n OSM_ATTRIBUTION\n];\n\n\n/**\n * @type {Object.<string, {extension: string, opaque: boolean}>}\n */\nconst LayerConfig = {\n 'terrain': {\n extension: 'jpg',\n opaque: true\n },\n 'terrain-background': {\n extension: 'jpg',\n opaque: true\n },\n 'terrain-labels': {\n extension: 'png',\n opaque: false\n },\n 'terrain-lines': {\n extension: 'png',\n opaque: false\n },\n 'toner-background': {\n extension: 'png',\n opaque: true\n },\n 'toner': {\n extension: 'png',\n opaque: true\n },\n 'toner-hybrid': {\n extension: 'png',\n opaque: false\n },\n 'toner-labels': {\n extension: 'png',\n opaque: false\n },\n 'toner-lines': {\n extension: 'png',\n opaque: false\n },\n 'toner-lite': {\n extension: 'png',\n opaque: true\n },\n 'watercolor': {\n extension: 'jpg',\n opaque: true\n }\n};\n\n\n/**\n * @type {Object.<string, {minZoom: number, maxZoom: number}>}\n */\nconst ProviderConfig = {\n 'terrain': {\n minZoom: 4,\n maxZoom: 18\n },\n 'toner': {\n minZoom: 0,\n maxZoom: 20\n },\n 'watercolor': {\n minZoom: 1,\n maxZoom: 16\n }\n};\n\n\n/**\n * @typedef {Object} Options\n * @property {number} [cacheSize=2048] Cache size.\n * @property {string} [layer] Layer.\n * @property {number} [minZoom] Minimum zoom.\n * @property {number} [maxZoom] Maximum zoom.\n * @property {boolean} [opaque] Whether the layer is opaque.\n * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {module:ol/Tile~LoadFunction} [tileLoadFunction]\n * Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n */\n\n\n/**\n * @classdesc\n * Layer source for the Stamen tile server.\n *\n * @constructor\n * @extends {module:ol/source/XYZ}\n * @param {module:ol/source/Stamen~Options=} options Stamen options.\n * @api\n */\nconst Stamen = function(options) {\n const i = options.layer.indexOf('-');\n const provider = i == -1 ? options.layer : options.layer.slice(0, i);\n const providerConfig = ProviderConfig[provider];\n\n const layerConfig = LayerConfig[options.layer];\n\n const url = options.url !== undefined ? options.url :\n 'https://stamen-tiles-{a-d}.a.ssl.fastly.net/' + options.layer +\n '/{z}/{x}/{y}.' + layerConfig.extension;\n\n XYZ.call(this, {\n attributions: ATTRIBUTIONS,\n cacheSize: options.cacheSize,\n crossOrigin: 'anonymous',\n maxZoom: options.maxZoom != undefined ? options.maxZoom : providerConfig.maxZoom,\n minZoom: options.minZoom != undefined ? options.minZoom : providerConfig.minZoom,\n opaque: layerConfig.opaque,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileLoadFunction: options.tileLoadFunction,\n url: url,\n wrapX: options.wrapX\n });\n};\n\ninherits(Stamen, XYZ);\n\nexport default Stamen;\n","/**\n * @module ol/source/TileArcGISRest\n */\nimport {inherits} from '../util.js';\nimport {createEmpty} from '../extent.js';\nimport {modulo} from '../math.js';\nimport {assign} from '../obj.js';\nimport {toSize, scale as scaleSize} from '../size.js';\nimport TileImage from '../source/TileImage.js';\nimport {hash as tileCoordHash} from '../tilecoord.js';\nimport {appendParams} from '../uri.js';\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images.\n * Note that you must provide a `crossOrigin` value if you are using the WebGL renderer\n * or if you want to access pixel data with the Canvas renderer. See\n * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image}\n * for more detail.\n * @property {Object.<string,*>} [params] ArcGIS Rest parameters. This field is optional. Service defaults will be\n * used for any fields not specified. `FORMAT` is `PNG32` by default. `F` is `IMAGE` by\n * default. `TRANSPARENT` is `true` by default. `BBOX, `SIZE`, `BBOXSR`,\n * and `IMAGESR` will be set dynamically. Set `LAYERS` to\n * override the default service layer visibility. See\n * {@link http://resources.arcgis.com/en/help/arcgis-rest-api/index.html#/Export_Map/02r3000000v7000000/}\n * for further reference.\n * @property {module:ol/tilegrid/TileGrid} [tileGrid] Tile grid. Base this on the resolutions,\n * tilesize and extent supported by the server.\n * If this is not defined, a default grid will be used: if there is a projection\n * extent, the grid will be based on that; if not, a grid based on a global\n * extent with origin at 0,0 will be used.\n * @property {module:ol/proj~ProjectionLike} projection Projection.\n * @property {number} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {module:ol/Tile~LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL.\n * The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {string} [url] ArcGIS Rest service URL for a Map Service or Image Service. The\n * url should include /MapServer or /ImageServer.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering. To disable the opacity\n * transition, pass `transition: 0`.\n * @property {Array.<string>} urls ArcGIS Rest service urls. Use this instead of `url` when the ArcGIS\n * Service supports multiple urls for export requests.\n */\n\n\n/**\n * @classdesc\n * Layer source for tile data from ArcGIS Rest services. Map and Image\n * Services are supported.\n *\n * For cached ArcGIS services, better performance is available using the\n * {@link module:ol/source/XYZ~XYZ} data source.\n *\n * @constructor\n * @extends {module:ol/source/TileImage}\n * @param {module:ol/source/TileArcGISRest~Options=} opt_options Tile ArcGIS Rest options.\n * @api\n */\nconst TileArcGISRest = function(opt_options) {\n\n const options = opt_options || {};\n\n TileImage.call(this, {\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n projection: options.projection,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileGrid: options.tileGrid,\n tileLoadFunction: options.tileLoadFunction,\n url: options.url,\n urls: options.urls,\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n transition: options.transition\n });\n\n /**\n * @private\n * @type {!Object}\n */\n this.params_ = options.params || {};\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.tmpExtent_ = createEmpty();\n\n this.setKey(this.getKeyForParams_());\n};\n\ninherits(TileArcGISRest, TileImage);\n\n\n/**\n * @private\n * @return {string} The key for the current params.\n */\nTileArcGISRest.prototype.getKeyForParams_ = function() {\n let i = 0;\n const res = [];\n for (const key in this.params_) {\n res[i++] = key + '-' + this.params_[key];\n }\n return res.join('/');\n};\n\n\n/**\n * Get the user-provided params, i.e. those passed to the constructor through\n * the \"params\" option, and possibly updated using the updateParams method.\n * @return {Object} Params.\n * @api\n */\nTileArcGISRest.prototype.getParams = function() {\n return this.params_;\n};\n\n\n/**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {module:ol/size~Size} tileSize Tile size.\n * @param {module:ol/extent~Extent} tileExtent Tile extent.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @param {Object} params Params.\n * @return {string|undefined} Request URL.\n * @private\n */\nTileArcGISRest.prototype.getRequestUrl_ = function(tileCoord, tileSize, tileExtent,\n pixelRatio, projection, params) {\n\n const urls = this.urls;\n if (!urls) {\n return undefined;\n }\n\n // ArcGIS Server only wants the numeric portion of the projection ID.\n const srid = projection.getCode().split(':').pop();\n\n params['SIZE'] = tileSize[0] + ',' + tileSize[1];\n params['BBOX'] = tileExtent.join(',');\n params['BBOXSR'] = srid;\n params['IMAGESR'] = srid;\n params['DPI'] = Math.round(\n params['DPI'] ? params['DPI'] * pixelRatio : 90 * pixelRatio\n );\n\n let url;\n if (urls.length == 1) {\n url = urls[0];\n } else {\n const index = modulo(tileCoordHash(tileCoord), urls.length);\n url = urls[index];\n }\n\n const modifiedUrl = url\n .replace(/MapServer\\/?$/, 'MapServer/export')\n .replace(/ImageServer\\/?$/, 'ImageServer/exportImage');\n return appendParams(modifiedUrl, params);\n};\n\n\n/**\n * @inheritDoc\n */\nTileArcGISRest.prototype.getTilePixelRatio = function(pixelRatio) {\n return /** @type {number} */ (pixelRatio);\n};\n\n\n/**\n * @inheritDoc\n */\nTileArcGISRest.prototype.fixedTileUrlFunction = function(tileCoord, pixelRatio, projection) {\n\n let tileGrid = this.getTileGrid();\n if (!tileGrid) {\n tileGrid = this.getTileGridForProjection(projection);\n }\n\n if (tileGrid.getResolutions().length <= tileCoord[0]) {\n return undefined;\n }\n\n const tileExtent = tileGrid.getTileCoordExtent(\n tileCoord, this.tmpExtent_);\n let tileSize = toSize(\n tileGrid.getTileSize(tileCoord[0]), this.tmpSize);\n\n if (pixelRatio != 1) {\n tileSize = scaleSize(tileSize, pixelRatio, this.tmpSize);\n }\n\n // Apply default params and override with user specified values.\n const baseParams = {\n 'F': 'image',\n 'FORMAT': 'PNG32',\n 'TRANSPARENT': true\n };\n assign(baseParams, this.params_);\n\n return this.getRequestUrl_(tileCoord, tileSize, tileExtent,\n pixelRatio, projection, baseParams);\n};\n\n\n/**\n * Update the user-provided params.\n * @param {Object} params Params.\n * @api\n */\nTileArcGISRest.prototype.updateParams = function(params) {\n assign(this.params_, params);\n this.setKey(this.getKeyForParams_());\n};\nexport default TileArcGISRest;\n","/**\n * @module ol/source/TileDebug\n */\nimport {inherits} from '../util.js';\nimport Tile from '../Tile.js';\nimport TileState from '../TileState.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {toSize} from '../size.js';\nimport TileSource from '../source/Tile.js';\nimport {getKeyZXY} from '../tilecoord.js';\n\n\n/**\n * @constructor\n * @extends {module:ol/Tile}\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {module:ol/size~Size} tileSize Tile size.\n * @param {string} text Text.\n */\nconst LabeledTile = function(tileCoord, tileSize, text) {\n\n Tile.call(this, tileCoord, TileState.LOADED);\n\n /**\n * @private\n * @type {module:ol/size~Size}\n */\n this.tileSize_ = tileSize;\n\n /**\n * @private\n * @type {string}\n */\n this.text_ = text;\n\n /**\n * @private\n * @type {HTMLCanvasElement}\n */\n this.canvas_ = null;\n\n};\ninherits(LabeledTile, Tile);\n\n\n/**\n * Get the image element for this tile.\n * @return {HTMLCanvasElement} Image.\n */\nLabeledTile.prototype.getImage = function() {\n if (this.canvas_) {\n return this.canvas_;\n } else {\n const tileSize = this.tileSize_;\n const context = createCanvasContext2D(tileSize[0], tileSize[1]);\n\n context.strokeStyle = 'black';\n context.strokeRect(0.5, 0.5, tileSize[0] + 0.5, tileSize[1] + 0.5);\n\n context.fillStyle = 'black';\n context.textAlign = 'center';\n context.textBaseline = 'middle';\n context.font = '24px sans-serif';\n context.fillText(this.text_, tileSize[0] / 2, tileSize[1] / 2);\n\n this.canvas_ = context.canvas;\n return context.canvas;\n }\n};\n\n\n/**\n * @override\n */\nLabeledTile.prototype.load = function() {};\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/proj~ProjectionLike} projection Projection.\n * @property {module:ol/tilegrid/TileGrid} [tileGrid] Tile grid.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n */\n\n\n/**\n * @classdesc\n * A pseudo tile source, which does not fetch tiles from a server, but renders\n * a grid outline for the tile grid/projection along with the coordinates for\n * each tile. See examples/canvas-tiles for an example.\n *\n * Uses Canvas context2d, so requires Canvas support.\n *\n * @constructor\n * @extends {module:ol/source/Tile}\n * @param {module:ol/source/TileDebug~Options=} options Debug tile options.\n * @api\n */\nconst TileDebug = function(options) {\n\n TileSource.call(this, {\n opaque: false,\n projection: options.projection,\n tileGrid: options.tileGrid,\n wrapX: options.wrapX !== undefined ? options.wrapX : true\n });\n\n};\n\ninherits(TileDebug, TileSource);\n\n\n/**\n * @inheritDoc\n */\nTileDebug.prototype.getTile = function(z, x, y) {\n const tileCoordKey = getKeyZXY(z, x, y);\n if (this.tileCache.containsKey(tileCoordKey)) {\n return /** @type {!module:ol/source/TileDebug~LabeledTile} */ (this.tileCache.get(tileCoordKey));\n } else {\n const tileSize = toSize(this.tileGrid.getTileSize(z));\n const tileCoord = [z, x, y];\n const textTileCoord = this.getTileCoordForTileUrlFunction(tileCoord);\n const text = !textTileCoord ? '' :\n this.getTileCoordForTileUrlFunction(textTileCoord).toString();\n const tile = new LabeledTile(tileCoord, tileSize, text);\n this.tileCache.set(tileCoordKey, tile);\n return tile;\n }\n};\n\n\nexport default TileDebug;\n","/**\n * @module ol/source/TileJSON\n */\n// FIXME check order of async callbacks\n\n/**\n * @see http://mapbox.com/developers/api/\n */\n\nimport {inherits} from '../util.js';\nimport {createFromTemplates} from '../tileurlfunction.js';\nimport {assert} from '../asserts.js';\nimport {applyTransform, intersects} from '../extent.js';\nimport {jsonp as requestJSONP} from '../net.js';\nimport {get as getProjection, getTransformFromProjections} from '../proj.js';\nimport SourceState from '../source/State.js';\nimport TileImage from '../source/TileImage.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer. See\n * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.\n * @property {boolean} [jsonp=false] Use JSONP with callback to load the TileJSON.\n * Useful when the server does not support CORS..\n * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {tileJSON} [tileJSON] TileJSON configuration for this source.\n * If not provided, `url` must be configured.\n * @property {module:ol/Tile~LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {string} [url] URL to the TileJSON file. If not provided, `tileJSON` must be configured.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n */\n\n\n/**\n * @classdesc\n * Layer source for tile data in TileJSON format.\n *\n * @constructor\n * @extends {module:ol/source/TileImage}\n * @param {module:ol/source/TileJSON~Options=} options TileJSON options.\n * @api\n */\nconst TileJSON = function(options) {\n\n /**\n * @type {TileJSON}\n * @private\n */\n this.tileJSON_ = null;\n\n TileImage.call(this, {\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n projection: getProjection('EPSG:3857'),\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n state: SourceState.LOADING,\n tileLoadFunction: options.tileLoadFunction,\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n transition: options.transition\n });\n\n if (options.url) {\n if (options.jsonp) {\n requestJSONP(options.url, this.handleTileJSONResponse.bind(this),\n this.handleTileJSONError.bind(this));\n } else {\n const client = new XMLHttpRequest();\n client.addEventListener('load', this.onXHRLoad_.bind(this));\n client.addEventListener('error', this.onXHRError_.bind(this));\n client.open('GET', options.url);\n client.send();\n }\n } else if (options.tileJSON) {\n this.handleTileJSONResponse(options.tileJSON);\n } else {\n assert(false, 51); // Either `url` or `tileJSON` options must be provided\n }\n\n};\n\ninherits(TileJSON, TileImage);\n\n\n/**\n * @private\n * @param {Event} event The load event.\n */\nTileJSON.prototype.onXHRLoad_ = function(event) {\n const client = /** @type {XMLHttpRequest} */ (event.target);\n // status will be 0 for file:// urls\n if (!client.status || client.status >= 200 && client.status < 300) {\n let response;\n try {\n response = /** @type {TileJSON} */(JSON.parse(client.responseText));\n } catch (err) {\n this.handleTileJSONError();\n return;\n }\n this.handleTileJSONResponse(response);\n } else {\n this.handleTileJSONError();\n }\n};\n\n\n/**\n * @private\n * @param {Event} event The error event.\n */\nTileJSON.prototype.onXHRError_ = function(event) {\n this.handleTileJSONError();\n};\n\n\n/**\n * @return {TileJSON} The tilejson object.\n * @api\n */\nTileJSON.prototype.getTileJSON = function() {\n return this.tileJSON_;\n};\n\n\n/**\n * @protected\n * @param {TileJSON} tileJSON Tile JSON.\n */\nTileJSON.prototype.handleTileJSONResponse = function(tileJSON) {\n\n const epsg4326Projection = getProjection('EPSG:4326');\n\n const sourceProjection = this.getProjection();\n let extent;\n if (tileJSON.bounds !== undefined) {\n const transform = getTransformFromProjections(\n epsg4326Projection, sourceProjection);\n extent = applyTransform(tileJSON.bounds, transform);\n }\n\n const minZoom = tileJSON.minzoom || 0;\n const maxZoom = tileJSON.maxzoom || 22;\n const tileGrid = createXYZ({\n extent: extentFromProjection(sourceProjection),\n maxZoom: maxZoom,\n minZoom: minZoom\n });\n this.tileGrid = tileGrid;\n\n this.tileUrlFunction = createFromTemplates(tileJSON.tiles, tileGrid);\n\n if (tileJSON.attribution !== undefined && !this.getAttributions()) {\n const attributionExtent = extent !== undefined ?\n extent : epsg4326Projection.getExtent();\n\n this.setAttributions(function(frameState) {\n if (intersects(attributionExtent, frameState.extent)) {\n return [tileJSON.attribution];\n }\n return null;\n });\n\n }\n this.tileJSON_ = tileJSON;\n this.setState(SourceState.READY);\n\n};\n\n\n/**\n * @protected\n */\nTileJSON.prototype.handleTileJSONError = function() {\n this.setState(SourceState.ERROR);\n};\nexport default TileJSON;\n","/**\n * @module ol/source/TileWMS\n */\n\nimport {DEFAULT_WMS_VERSION} from './common.js';\nimport {inherits} from '../util.js';\nimport {assert} from '../asserts.js';\nimport {buffer, createEmpty} from '../extent.js';\nimport {assign} from '../obj.js';\nimport {modulo} from '../math.js';\nimport {get as getProjection, transform, transformExtent} from '../proj.js';\nimport {calculateSourceResolution} from '../reproj.js';\nimport {toSize, buffer as bufferSize, scale as scaleSize} from '../size.js';\nimport TileImage from '../source/TileImage.js';\nimport WMSServerType from '../source/WMSServerType.js';\nimport {hash as tileCoordHash} from '../tilecoord.js';\nimport {compareVersions} from '../string.js';\nimport {appendParams} from '../uri.js';\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer. See\n * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.\n * @property {Object.<string,*>} params WMS request parameters.\n * At least a `LAYERS` param is required. `STYLES` is\n * `''` by default. `VERSION` is `1.3.0` by default. `WIDTH`, `HEIGHT`, `BBOX`\n * and `CRS` (`SRS` for WMS version < 1.3.0) will be set dynamically.\n * @property {number} [gutter=0]\n * The size in pixels of the gutter around image tiles to ignore. By setting\n * this property to a non-zero value, images will be requested that are wider\n * and taller than the tile size by a value of `2 x gutter`.\n * Using a non-zero value allows artifacts of rendering at tile edges to be\n * ignored. If you control the WMS service it is recommended to address\n * \"artifacts at tile edges\" issues by properly configuring the WMS service. For\n * example, MapServer has a `tile_map_edge_buffer` configuration parameter for\n * this. See http://mapserver.org/output/tile_mode.html.\n * @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting\n * the image from the remote server.\n * @property {module:ol/proj~ProjectionLike} projection Projection.\n * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {module:ol/ImageTile~TileClass} [tileClass] Class used to instantiate image tiles.\n * Default is {@link module:ol/ImageTile~TileClass}.\n * @property {module:ol/tilegrid/TileGrid} [tileGrid] Tile grid. Base this on the resolutions,\n * tilesize and extent supported by the server.\n * If this is not defined, a default grid will be used: if there is a projection\n * extent, the grid will be based on that; if not, a grid based on a global\n * extent with origin at 0,0 will be used..\n * @property {module:ol/source/WMSServerType|string} [serverType]\n * The type of the remote WMS server. Currently only used when `hidpi` is\n * `true`.\n * @property {module:ol/Tile~LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {string} [url] WMS service URL.\n * @property {Array.<string>} [urls] WMS service urls.\n * Use this instead of `url` when the WMS supports multiple urls for GetMap requests.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * When set to `false`, only one world\n * will be rendered. When `true`, tiles will be requested for one world only,\n * but they will be wrapped horizontally to render multiple worlds.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n */\n\n\n/**\n * @classdesc\n * Layer source for tile data from WMS servers.\n *\n * @constructor\n * @extends {module:ol/source/TileImage}\n * @param {module:ol/source/TileWMS~Options=} [opt_options] Tile WMS options.\n * @api\n */\nconst TileWMS = function(opt_options) {\n\n const options = opt_options || {};\n\n const params = options.params || {};\n\n const transparent = 'TRANSPARENT' in params ? params['TRANSPARENT'] : true;\n\n TileImage.call(this, {\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n opaque: !transparent,\n projection: options.projection,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileClass: options.tileClass,\n tileGrid: options.tileGrid,\n tileLoadFunction: options.tileLoadFunction,\n url: options.url,\n urls: options.urls,\n wrapX: options.wrapX !== undefined ? options.wrapX : true,\n transition: options.transition\n });\n\n /**\n * @private\n * @type {number}\n */\n this.gutter_ = options.gutter !== undefined ? options.gutter : 0;\n\n /**\n * @private\n * @type {!Object}\n */\n this.params_ = params;\n\n /**\n * @private\n * @type {boolean}\n */\n this.v13_ = true;\n\n /**\n * @private\n * @type {module:ol/source/WMSServerType|undefined}\n */\n this.serverType_ = /** @type {module:ol/source/WMSServerType|undefined} */ (options.serverType);\n\n /**\n * @private\n * @type {boolean}\n */\n this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.tmpExtent_ = createEmpty();\n\n this.updateV13_();\n this.setKey(this.getKeyForParams_());\n\n};\n\ninherits(TileWMS, TileImage);\n\n\n/**\n * Return the GetFeatureInfo URL for the passed coordinate, resolution, and\n * projection. Return `undefined` if the GetFeatureInfo URL cannot be\n * constructed.\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {number} resolution Resolution.\n * @param {module:ol/proj~ProjectionLike} projection Projection.\n * @param {!Object} params GetFeatureInfo params. `INFO_FORMAT` at least should\n * be provided. If `QUERY_LAYERS` is not provided then the layers specified\n * in the `LAYERS` parameter will be used. `VERSION` should not be\n * specified here.\n * @return {string|undefined} GetFeatureInfo URL.\n * @api\n */\nTileWMS.prototype.getGetFeatureInfoUrl = function(coordinate, resolution, projection, params) {\n const projectionObj = getProjection(projection);\n const sourceProjectionObj = this.getProjection();\n\n let tileGrid = this.getTileGrid();\n if (!tileGrid) {\n tileGrid = this.getTileGridForProjection(projectionObj);\n }\n\n const tileCoord = tileGrid.getTileCoordForCoordAndResolution(coordinate, resolution);\n\n if (tileGrid.getResolutions().length <= tileCoord[0]) {\n return undefined;\n }\n\n let tileResolution = tileGrid.getResolution(tileCoord[0]);\n let tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent_);\n let tileSize = toSize(tileGrid.getTileSize(tileCoord[0]), this.tmpSize);\n\n\n const gutter = this.gutter_;\n if (gutter !== 0) {\n tileSize = bufferSize(tileSize, gutter, this.tmpSize);\n tileExtent = buffer(tileExtent, tileResolution * gutter, tileExtent);\n }\n\n if (sourceProjectionObj && sourceProjectionObj !== projectionObj) {\n tileResolution = calculateSourceResolution(sourceProjectionObj, projectionObj, coordinate, tileResolution);\n tileExtent = transformExtent(tileExtent, projectionObj, sourceProjectionObj);\n coordinate = transform(coordinate, projectionObj, sourceProjectionObj);\n }\n\n const baseParams = {\n 'SERVICE': 'WMS',\n 'VERSION': DEFAULT_WMS_VERSION,\n 'REQUEST': 'GetFeatureInfo',\n 'FORMAT': 'image/png',\n 'TRANSPARENT': true,\n 'QUERY_LAYERS': this.params_['LAYERS']\n };\n assign(baseParams, this.params_, params);\n\n const x = Math.floor((coordinate[0] - tileExtent[0]) / tileResolution);\n const y = Math.floor((tileExtent[3] - coordinate[1]) / tileResolution);\n\n baseParams[this.v13_ ? 'I' : 'X'] = x;\n baseParams[this.v13_ ? 'J' : 'Y'] = y;\n\n return this.getRequestUrl_(tileCoord, tileSize, tileExtent,\n 1, sourceProjectionObj || projectionObj, baseParams);\n};\n\n\n/**\n * @inheritDoc\n */\nTileWMS.prototype.getGutterInternal = function() {\n return this.gutter_;\n};\n\n\n/**\n * Get the user-provided params, i.e. those passed to the constructor through\n * the \"params\" option, and possibly updated using the updateParams method.\n * @return {Object} Params.\n * @api\n */\nTileWMS.prototype.getParams = function() {\n return this.params_;\n};\n\n\n/**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {module:ol/size~Size} tileSize Tile size.\n * @param {module:ol/extent~Extent} tileExtent Tile extent.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @param {Object} params Params.\n * @return {string|undefined} Request URL.\n * @private\n */\nTileWMS.prototype.getRequestUrl_ = function(tileCoord, tileSize, tileExtent,\n pixelRatio, projection, params) {\n\n const urls = this.urls;\n if (!urls) {\n return undefined;\n }\n\n params['WIDTH'] = tileSize[0];\n params['HEIGHT'] = tileSize[1];\n\n params[this.v13_ ? 'CRS' : 'SRS'] = projection.getCode();\n\n if (!('STYLES' in this.params_)) {\n params['STYLES'] = '';\n }\n\n if (pixelRatio != 1) {\n switch (this.serverType_) {\n case WMSServerType.GEOSERVER:\n const dpi = (90 * pixelRatio + 0.5) | 0;\n if ('FORMAT_OPTIONS' in params) {\n params['FORMAT_OPTIONS'] += ';dpi:' + dpi;\n } else {\n params['FORMAT_OPTIONS'] = 'dpi:' + dpi;\n }\n break;\n case WMSServerType.MAPSERVER:\n params['MAP_RESOLUTION'] = 90 * pixelRatio;\n break;\n case WMSServerType.CARMENTA_SERVER:\n case WMSServerType.QGIS:\n params['DPI'] = 90 * pixelRatio;\n break;\n default:\n assert(false, 52); // Unknown `serverType` configured\n break;\n }\n }\n\n const axisOrientation = projection.getAxisOrientation();\n const bbox = tileExtent;\n if (this.v13_ && axisOrientation.substr(0, 2) == 'ne') {\n let tmp;\n tmp = tileExtent[0];\n bbox[0] = tileExtent[1];\n bbox[1] = tmp;\n tmp = tileExtent[2];\n bbox[2] = tileExtent[3];\n bbox[3] = tmp;\n }\n params['BBOX'] = bbox.join(',');\n\n let url;\n if (urls.length == 1) {\n url = urls[0];\n } else {\n const index = modulo(tileCoordHash(tileCoord), urls.length);\n url = urls[index];\n }\n return appendParams(url, params);\n};\n\n\n/**\n * @inheritDoc\n */\nTileWMS.prototype.getTilePixelRatio = function(pixelRatio) {\n return (!this.hidpi_ || this.serverType_ === undefined) ? 1 :\n /** @type {number} */ (pixelRatio);\n};\n\n\n/**\n * @private\n * @return {string} The key for the current params.\n */\nTileWMS.prototype.getKeyForParams_ = function() {\n let i = 0;\n const res = [];\n for (const key in this.params_) {\n res[i++] = key + '-' + this.params_[key];\n }\n return res.join('/');\n};\n\n\n/**\n * @inheritDoc\n */\nTileWMS.prototype.fixedTileUrlFunction = function(tileCoord, pixelRatio, projection) {\n\n let tileGrid = this.getTileGrid();\n if (!tileGrid) {\n tileGrid = this.getTileGridForProjection(projection);\n }\n\n if (tileGrid.getResolutions().length <= tileCoord[0]) {\n return undefined;\n }\n\n if (pixelRatio != 1 && (!this.hidpi_ || this.serverType_ === undefined)) {\n pixelRatio = 1;\n }\n\n const tileResolution = tileGrid.getResolution(tileCoord[0]);\n let tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent_);\n let tileSize = toSize(\n tileGrid.getTileSize(tileCoord[0]), this.tmpSize);\n\n const gutter = this.gutter_;\n if (gutter !== 0) {\n tileSize = bufferSize(tileSize, gutter, this.tmpSize);\n tileExtent = buffer(tileExtent, tileResolution * gutter, tileExtent);\n }\n\n if (pixelRatio != 1) {\n tileSize = scaleSize(tileSize, pixelRatio, this.tmpSize);\n }\n\n const baseParams = {\n 'SERVICE': 'WMS',\n 'VERSION': DEFAULT_WMS_VERSION,\n 'REQUEST': 'GetMap',\n 'FORMAT': 'image/png',\n 'TRANSPARENT': true\n };\n assign(baseParams, this.params_);\n\n return this.getRequestUrl_(tileCoord, tileSize, tileExtent,\n pixelRatio, projection, baseParams);\n};\n\n/**\n * Update the user-provided params.\n * @param {Object} params Params.\n * @api\n */\nTileWMS.prototype.updateParams = function(params) {\n assign(this.params_, params);\n this.updateV13_();\n this.setKey(this.getKeyForParams_());\n};\n\n\n/**\n * @private\n */\nTileWMS.prototype.updateV13_ = function() {\n const version = this.params_['VERSION'] || DEFAULT_WMS_VERSION;\n this.v13_ = compareVersions(version, '1.3') >= 0;\n};\nexport default TileWMS;\n","/**\n * @module ol/source/UTFGrid\n */\nimport {inherits} from '../util.js';\nimport Tile from '../Tile.js';\nimport TileState from '../TileState.js';\nimport {createFromTemplates, nullTileUrlFunction} from '../tileurlfunction.js';\nimport {assert} from '../asserts.js';\nimport {listenOnce} from '../events.js';\nimport EventType from '../events/EventType.js';\nimport {applyTransform, intersects} from '../extent.js';\nimport {jsonp as requestJSONP} from '../net.js';\nimport {get as getProjection, getTransformFromProjections} from '../proj.js';\nimport SourceState from '../source/State.js';\nimport TileSource from '../source/Tile.js';\nimport {getKeyZXY} from '../tilecoord.js';\nimport {createXYZ, extentFromProjection} from '../tilegrid.js';\n\n\n/**\n * @constructor\n * @extends {module:ol/Tile}\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {module:ol/TileState} state State.\n * @param {string} src Image source URI.\n * @param {module:ol/extent~Extent} extent Extent of the tile.\n * @param {boolean} preemptive Load the tile when visible (before it's needed).\n * @param {boolean} jsonp Load the tile as a script.\n */\nexport const CustomTile = function(tileCoord, state, src, extent, preemptive, jsonp) {\n\n Tile.call(this, tileCoord, state);\n\n /**\n * @private\n * @type {string}\n */\n this.src_ = src;\n\n /**\n * @private\n * @type {module:ol/extent~Extent}\n */\n this.extent_ = extent;\n\n /**\n * @private\n * @type {boolean}\n */\n this.preemptive_ = preemptive;\n\n /**\n * @private\n * @type {Array.<string>}\n */\n this.grid_ = null;\n\n /**\n * @private\n * @type {Array.<string>}\n */\n this.keys_ = null;\n\n /**\n * @private\n * @type {Object.<string, Object>|undefined}\n */\n this.data_ = null;\n\n\n /**\n * @private\n * @type {boolean}\n */\n this.jsonp_ = jsonp;\n\n};\ninherits(CustomTile, Tile);\n\n\n/**\n * Get the image element for this tile.\n * @return {Image} Image.\n */\nCustomTile.prototype.getImage = function() {\n return null;\n};\n\n\n/**\n * Synchronously returns data at given coordinate (if available).\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @return {*} The data.\n */\nCustomTile.prototype.getData = function(coordinate) {\n if (!this.grid_ || !this.keys_) {\n return null;\n }\n const xRelative = (coordinate[0] - this.extent_[0]) /\n (this.extent_[2] - this.extent_[0]);\n const yRelative = (coordinate[1] - this.extent_[1]) /\n (this.extent_[3] - this.extent_[1]);\n\n const row = this.grid_[Math.floor((1 - yRelative) * this.grid_.length)];\n\n if (typeof row !== 'string') {\n return null;\n }\n\n let code = row.charCodeAt(Math.floor(xRelative * row.length));\n if (code >= 93) {\n code--;\n }\n if (code >= 35) {\n code--;\n }\n code -= 32;\n\n let data = null;\n if (code in this.keys_) {\n const id = this.keys_[code];\n if (this.data_ && id in this.data_) {\n data = this.data_[id];\n } else {\n data = id;\n }\n }\n return data;\n};\n\n\n/**\n * Calls the callback (synchronously by default) with the available data\n * for given coordinate (or `null` if not yet loaded).\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {function(this: T, *)} callback Callback.\n * @param {T=} opt_this The object to use as `this` in the callback.\n * @param {boolean=} opt_request If `true` the callback is always async.\n * The tile data is requested if not yet loaded.\n * @template T\n */\nCustomTile.prototype.forDataAtCoordinate = function(coordinate, callback, opt_this, opt_request) {\n if (this.state == TileState.IDLE && opt_request === true) {\n listenOnce(this, EventType.CHANGE, function(e) {\n callback.call(opt_this, this.getData(coordinate));\n }, this);\n this.loadInternal_();\n } else {\n if (opt_request === true) {\n setTimeout(function() {\n callback.call(opt_this, this.getData(coordinate));\n }.bind(this), 0);\n } else {\n callback.call(opt_this, this.getData(coordinate));\n }\n }\n};\n\n\n/**\n * @inheritDoc\n */\nCustomTile.prototype.getKey = function() {\n return this.src_;\n};\n\n\n/**\n * @private\n */\nCustomTile.prototype.handleError_ = function() {\n this.state = TileState.ERROR;\n this.changed();\n};\n\n\n/**\n * @param {!UTFGridJSON} json UTFGrid data.\n * @private\n */\nCustomTile.prototype.handleLoad_ = function(json) {\n this.grid_ = json.grid;\n this.keys_ = json.keys;\n this.data_ = json.data;\n\n this.state = TileState.EMPTY;\n this.changed();\n};\n\n\n/**\n * @private\n */\nCustomTile.prototype.loadInternal_ = function() {\n if (this.state == TileState.IDLE) {\n this.state = TileState.LOADING;\n if (this.jsonp_) {\n requestJSONP(this.src_, this.handleLoad_.bind(this),\n this.handleError_.bind(this));\n } else {\n const client = new XMLHttpRequest();\n client.addEventListener('load', this.onXHRLoad_.bind(this));\n client.addEventListener('error', this.onXHRError_.bind(this));\n client.open('GET', this.src_);\n client.send();\n }\n }\n};\n\n\n/**\n * @private\n * @param {Event} event The load event.\n */\nCustomTile.prototype.onXHRLoad_ = function(event) {\n const client = /** @type {XMLHttpRequest} */ (event.target);\n // status will be 0 for file:// urls\n if (!client.status || client.status >= 200 && client.status < 300) {\n let response;\n try {\n response = /** @type {!UTFGridJSON} */(JSON.parse(client.responseText));\n } catch (err) {\n this.handleError_();\n return;\n }\n this.handleLoad_(response);\n } else {\n this.handleError_();\n }\n};\n\n\n/**\n * @private\n * @param {Event} event The error event.\n */\nCustomTile.prototype.onXHRError_ = function(event) {\n this.handleError_();\n};\n\n\n/**\n * @override\n */\nCustomTile.prototype.load = function() {\n if (this.preemptive_) {\n this.loadInternal_();\n }\n};\n\n\n/**\n * @typedef {Object} Options\n * @property {boolean} [preemptive=true]\n * If `true` the UTFGrid source loads the tiles based on their \"visibility\".\n * This improves the speed of response, but increases traffic.\n * Note that if set to `false`, you need to pass `true` as `opt_request`\n * to the `forDataAtCoordinateAndResolution` method otherwise no data\n * will ever be loaded.\n * @property {boolean} [jsonp=false] Use JSONP with callback to load the TileJSON.\n * Useful when the server does not support CORS..\n * @property {tileJSON} [tileJSON] TileJSON configuration for this source.\n * If not provided, `url` must be configured.\n * @property {string} [url] TileJSON endpoint that provides the configuration for this source.\n * Request will be made through JSONP. If not provided, `tileJSON` must be configured.\n */\n\n\n/**\n * @classdesc\n * Layer source for UTFGrid interaction data loaded from TileJSON format.\n *\n * @constructor\n * @extends {module:ol/source/Tile}\n * @param {module:ol/source/UTFGrid~Options=} options Source options.\n * @api\n */\nconst UTFGrid = function(options) {\n TileSource.call(this, {\n projection: getProjection('EPSG:3857'),\n state: SourceState.LOADING\n });\n\n /**\n * @private\n * @type {boolean}\n */\n this.preemptive_ = options.preemptive !== undefined ?\n options.preemptive : true;\n\n /**\n * @private\n * @type {!module:ol/Tile~UrlFunction}\n */\n this.tileUrlFunction_ = nullTileUrlFunction;\n\n /**\n * @private\n * @type {string|undefined}\n */\n this.template_ = undefined;\n\n /**\n * @private\n * @type {boolean}\n */\n this.jsonp_ = options.jsonp || false;\n\n if (options.url) {\n if (this.jsonp_) {\n requestJSONP(options.url, this.handleTileJSONResponse.bind(this),\n this.handleTileJSONError.bind(this));\n } else {\n const client = new XMLHttpRequest();\n client.addEventListener('load', this.onXHRLoad_.bind(this));\n client.addEventListener('error', this.onXHRError_.bind(this));\n client.open('GET', options.url);\n client.send();\n }\n } else if (options.tileJSON) {\n this.handleTileJSONResponse(options.tileJSON);\n } else {\n assert(false, 51); // Either `url` or `tileJSON` options must be provided\n }\n};\n\ninherits(UTFGrid, TileSource);\n\n\n/**\n * @private\n * @param {Event} event The load event.\n */\nUTFGrid.prototype.onXHRLoad_ = function(event) {\n const client = /** @type {XMLHttpRequest} */ (event.target);\n // status will be 0 for file:// urls\n if (!client.status || client.status >= 200 && client.status < 300) {\n let response;\n try {\n response = /** @type {TileJSON} */(JSON.parse(client.responseText));\n } catch (err) {\n this.handleTileJSONError();\n return;\n }\n this.handleTileJSONResponse(response);\n } else {\n this.handleTileJSONError();\n }\n};\n\n\n/**\n * @private\n * @param {Event} event The error event.\n */\nUTFGrid.prototype.onXHRError_ = function(event) {\n this.handleTileJSONError();\n};\n\n\n/**\n * Return the template from TileJSON.\n * @return {string|undefined} The template from TileJSON.\n * @api\n */\nUTFGrid.prototype.getTemplate = function() {\n return this.template_;\n};\n\n\n/**\n * Calls the callback (synchronously by default) with the available data\n * for given coordinate and resolution (or `null` if not yet loaded or\n * in case of an error).\n * @param {module:ol/coordinate~Coordinate} coordinate Coordinate.\n * @param {number} resolution Resolution.\n * @param {function(*)} callback Callback.\n * @param {boolean=} opt_request If `true` the callback is always async.\n * The tile data is requested if not yet loaded.\n * @api\n */\nUTFGrid.prototype.forDataAtCoordinateAndResolution = function(\n coordinate, resolution, callback, opt_request) {\n if (this.tileGrid) {\n const tileCoord = this.tileGrid.getTileCoordForCoordAndResolution(\n coordinate, resolution);\n const tile = /** @type {!module:ol/source/UTFGrid~CustomTile} */(this.getTile(\n tileCoord[0], tileCoord[1], tileCoord[2], 1, this.getProjection()));\n tile.forDataAtCoordinate(coordinate, callback, null, opt_request);\n } else {\n if (opt_request === true) {\n setTimeout(function() {\n callback(null);\n }, 0);\n } else {\n callback(null);\n }\n }\n};\n\n\n/**\n * @protected\n */\nUTFGrid.prototype.handleTileJSONError = function() {\n this.setState(SourceState.ERROR);\n};\n\n\n/**\n * TODO: very similar to ol/source/TileJSON#handleTileJSONResponse\n * @protected\n * @param {TileJSON} tileJSON Tile JSON.\n */\nUTFGrid.prototype.handleTileJSONResponse = function(tileJSON) {\n\n const epsg4326Projection = getProjection('EPSG:4326');\n\n const sourceProjection = this.getProjection();\n let extent;\n if (tileJSON.bounds !== undefined) {\n const transform = getTransformFromProjections(\n epsg4326Projection, sourceProjection);\n extent = applyTransform(tileJSON.bounds, transform);\n }\n\n const minZoom = tileJSON.minzoom || 0;\n const maxZoom = tileJSON.maxzoom || 22;\n const tileGrid = createXYZ({\n extent: extentFromProjection(sourceProjection),\n maxZoom: maxZoom,\n minZoom: minZoom\n });\n this.tileGrid = tileGrid;\n\n this.template_ = tileJSON.template;\n\n const grids = tileJSON.grids;\n if (!grids) {\n this.setState(SourceState.ERROR);\n return;\n }\n\n this.tileUrlFunction_ = createFromTemplates(grids, tileGrid);\n\n if (tileJSON.attribution !== undefined) {\n const attributionExtent = extent !== undefined ?\n extent : epsg4326Projection.getExtent();\n\n this.setAttributions(function(frameState) {\n if (intersects(attributionExtent, frameState.extent)) {\n return [tileJSON.attribution];\n }\n return null;\n });\n }\n\n this.setState(SourceState.READY);\n\n};\n\n\n/**\n * @inheritDoc\n */\nUTFGrid.prototype.getTile = function(z, x, y, pixelRatio, projection) {\n const tileCoordKey = getKeyZXY(z, x, y);\n if (this.tileCache.containsKey(tileCoordKey)) {\n return (\n /** @type {!module:ol/Tile} */ (this.tileCache.get(tileCoordKey))\n );\n } else {\n const tileCoord = [z, x, y];\n const urlTileCoord =\n this.getTileCoordForTileUrlFunction(tileCoord, projection);\n const tileUrl = this.tileUrlFunction_(urlTileCoord, pixelRatio, projection);\n const tile = new CustomTile(\n tileCoord,\n tileUrl !== undefined ? TileState.IDLE : TileState.EMPTY,\n tileUrl !== undefined ? tileUrl : '',\n this.tileGrid.getTileCoordExtent(tileCoord),\n this.preemptive_,\n this.jsonp_);\n this.tileCache.set(tileCoordKey, tile);\n return tile;\n }\n};\n\n\n/**\n * @inheritDoc\n */\nUTFGrid.prototype.useTile = function(z, x, y) {\n const tileCoordKey = getKeyZXY(z, x, y);\n if (this.tileCache.containsKey(tileCoordKey)) {\n this.tileCache.get(tileCoordKey);\n }\n};\n\n\nexport default UTFGrid;\n","/**\n * @module ol/VectorImageTile\n */\nimport {getUid, inherits} from './util.js';\nimport Tile from './Tile.js';\nimport TileState from './TileState.js';\nimport {createCanvasContext2D} from './dom.js';\nimport {listen, unlistenByKey} from './events.js';\nimport {getHeight, getIntersection, getWidth} from './extent.js';\nimport EventType from './events/EventType.js';\nimport {loadFeaturesXhr} from './featureloader.js';\nimport {UNDEFINED} from './functions.js';\n\n\n/**\n * @typedef {Object} ReplayState\n * @property {boolean} dirty\n * @property {null|module:ol/render~OrderFunction} renderedRenderOrder\n * @property {number} renderedTileRevision\n * @property {number} renderedRevision\n */\n\n\n/**\n * @constructor\n * @extends {module:ol/Tile}\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {module:ol/TileState} state State.\n * @param {number} sourceRevision Source revision.\n * @param {module:ol/format/Feature} format Feature format.\n * @param {module:ol/Tile~LoadFunction} tileLoadFunction Tile load function.\n * @param {module:ol/tilecoord~TileCoord} urlTileCoord Wrapped tile coordinate for source urls.\n * @param {module:ol/Tile~UrlFunction} tileUrlFunction Tile url function.\n * @param {module:ol/tilegrid/TileGrid} sourceTileGrid Tile grid of the source.\n * @param {module:ol/tilegrid/TileGrid} tileGrid Tile grid of the renderer.\n * @param {Object.<string, module:ol/VectorTile>} sourceTiles Source tiles.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @param {function(new: module:ol/VectorTile, module:ol/tilecoord~TileCoord, module:ol/TileState, string,\n * module:ol/format/Feature, module:ol/Tile~LoadFunction)} tileClass Class to\n * instantiate for source tiles.\n * @param {function(this: module:ol/source/VectorTile, module:ol/events/Event)} handleTileChange\n * Function to call when a source tile's state changes.\n * @param {number} zoom Integer zoom to render the tile for.\n */\nconst VectorImageTile = function(tileCoord, state, sourceRevision, format,\n tileLoadFunction, urlTileCoord, tileUrlFunction, sourceTileGrid, tileGrid,\n sourceTiles, pixelRatio, projection, tileClass, handleTileChange, zoom) {\n\n Tile.call(this, tileCoord, state, {transition: 0});\n\n /**\n * @private\n * @type {!Object.<string, CanvasRenderingContext2D>}\n */\n this.context_ = {};\n\n /**\n * @private\n * @type {module:ol/featureloader~FeatureLoader}\n */\n this.loader_;\n\n /**\n * @private\n * @type {!Object.<string, module:ol/VectorImageTile~ReplayState>}\n */\n this.replayState_ = {};\n\n /**\n * @private\n * @type {Object.<string, module:ol/VectorTile>}\n */\n this.sourceTiles_ = sourceTiles;\n\n /**\n * Keys of source tiles used by this tile. Use with {@link #getTile}.\n * @type {Array.<string>}\n */\n this.tileKeys = [];\n\n /**\n * @type {module:ol/extent~Extent}\n */\n this.extent = null;\n\n /**\n * @type {number}\n */\n this.sourceRevision_ = sourceRevision;\n\n /**\n * @type {module:ol/tilecoord~TileCoord}\n */\n this.wrappedTileCoord = urlTileCoord;\n\n /**\n * @type {Array.<module:ol/events~EventsKey>}\n */\n this.loadListenerKeys_ = [];\n\n /**\n * @type {Array.<module:ol/events~EventsKey>}\n */\n this.sourceTileListenerKeys_ = [];\n\n if (urlTileCoord) {\n const extent = this.extent = tileGrid.getTileCoordExtent(urlTileCoord);\n const resolution = tileGrid.getResolution(zoom);\n const sourceZ = sourceTileGrid.getZForResolution(resolution);\n const useLoadedOnly = zoom != tileCoord[0];\n let loadCount = 0;\n sourceTileGrid.forEachTileCoord(extent, sourceZ, function(sourceTileCoord) {\n let sharedExtent = getIntersection(extent,\n sourceTileGrid.getTileCoordExtent(sourceTileCoord));\n const sourceExtent = sourceTileGrid.getExtent();\n if (sourceExtent) {\n sharedExtent = getIntersection(sharedExtent, sourceExtent, sharedExtent);\n }\n if (getWidth(sharedExtent) / resolution >= 0.5 &&\n getHeight(sharedExtent) / resolution >= 0.5) {\n // only include source tile if overlap is at least 1 pixel\n ++loadCount;\n const sourceTileKey = sourceTileCoord.toString();\n let sourceTile = sourceTiles[sourceTileKey];\n if (!sourceTile && !useLoadedOnly) {\n const tileUrl = tileUrlFunction(sourceTileCoord, pixelRatio, projection);\n sourceTile = sourceTiles[sourceTileKey] = new tileClass(sourceTileCoord,\n tileUrl == undefined ? TileState.EMPTY : TileState.IDLE,\n tileUrl == undefined ? '' : tileUrl,\n format, tileLoadFunction);\n this.sourceTileListenerKeys_.push(\n listen(sourceTile, EventType.CHANGE, handleTileChange));\n }\n if (sourceTile && (!useLoadedOnly || sourceTile.getState() == TileState.LOADED)) {\n sourceTile.consumers++;\n this.tileKeys.push(sourceTileKey);\n }\n }\n }.bind(this));\n\n if (useLoadedOnly && loadCount == this.tileKeys.length) {\n this.finishLoading_();\n }\n\n if (zoom <= tileCoord[0] && this.state != TileState.LOADED) {\n while (zoom > tileGrid.getMinZoom()) {\n const tile = new VectorImageTile(tileCoord, state, sourceRevision,\n format, tileLoadFunction, urlTileCoord, tileUrlFunction,\n sourceTileGrid, tileGrid, sourceTiles, pixelRatio, projection,\n tileClass, UNDEFINED, --zoom);\n if (tile.state == TileState.LOADED) {\n this.interimTile = tile;\n break;\n }\n }\n }\n }\n\n};\n\ninherits(VectorImageTile, Tile);\n\n\n/**\n * @inheritDoc\n */\nVectorImageTile.prototype.disposeInternal = function() {\n this.state = TileState.ABORT;\n this.changed();\n if (this.interimTile) {\n this.interimTile.dispose();\n }\n\n for (let i = 0, ii = this.tileKeys.length; i < ii; ++i) {\n const sourceTileKey = this.tileKeys[i];\n const sourceTile = this.getTile(sourceTileKey);\n sourceTile.consumers--;\n if (sourceTile.consumers == 0) {\n delete this.sourceTiles_[sourceTileKey];\n sourceTile.dispose();\n }\n }\n this.tileKeys.length = 0;\n this.sourceTiles_ = null;\n this.loadListenerKeys_.forEach(unlistenByKey);\n this.loadListenerKeys_.length = 0;\n this.sourceTileListenerKeys_.forEach(unlistenByKey);\n this.sourceTileListenerKeys_.length = 0;\n Tile.prototype.disposeInternal.call(this);\n};\n\n\n/**\n * @param {module:ol/layer/Layer} layer Layer.\n * @return {CanvasRenderingContext2D} The rendering context.\n */\nVectorImageTile.prototype.getContext = function(layer) {\n const key = getUid(layer).toString();\n if (!(key in this.context_)) {\n this.context_[key] = createCanvasContext2D();\n }\n return this.context_[key];\n};\n\n\n/**\n * Get the Canvas for this tile.\n * @param {module:ol/layer/Layer} layer Layer.\n * @return {HTMLCanvasElement} Canvas.\n */\nVectorImageTile.prototype.getImage = function(layer) {\n return this.getReplayState(layer).renderedTileRevision == -1 ?\n null : this.getContext(layer).canvas;\n};\n\n\n/**\n * @param {module:ol/layer/Layer} layer Layer.\n * @return {module:ol/VectorImageTile~ReplayState} The replay state.\n */\nVectorImageTile.prototype.getReplayState = function(layer) {\n const key = getUid(layer).toString();\n if (!(key in this.replayState_)) {\n this.replayState_[key] = {\n dirty: false,\n renderedRenderOrder: null,\n renderedRevision: -1,\n renderedTileRevision: -1\n };\n }\n return this.replayState_[key];\n};\n\n\n/**\n * @inheritDoc\n */\nVectorImageTile.prototype.getKey = function() {\n return this.tileKeys.join('/') + '-' + this.sourceRevision_;\n};\n\n\n/**\n * @param {string} tileKey Key (tileCoord) of the source tile.\n * @return {module:ol/VectorTile} Source tile.\n */\nVectorImageTile.prototype.getTile = function(tileKey) {\n return this.sourceTiles_[tileKey];\n};\n\n\n/**\n * @inheritDoc\n */\nVectorImageTile.prototype.load = function() {\n // Source tiles with LOADED state - we just count them because once they are\n // loaded, we're no longer listening to state changes.\n let leftToLoad = 0;\n // Source tiles with ERROR state - we track them because they can still have\n // an ERROR state after another load attempt.\n const errorSourceTiles = {};\n\n if (this.state == TileState.IDLE) {\n this.setState(TileState.LOADING);\n }\n if (this.state == TileState.LOADING) {\n this.tileKeys.forEach(function(sourceTileKey) {\n const sourceTile = this.getTile(sourceTileKey);\n if (sourceTile.state == TileState.IDLE) {\n sourceTile.setLoader(this.loader_);\n sourceTile.load();\n }\n if (sourceTile.state == TileState.LOADING) {\n const key = listen(sourceTile, EventType.CHANGE, function(e) {\n const state = sourceTile.getState();\n if (state == TileState.LOADED ||\n state == TileState.ERROR) {\n const uid = getUid(sourceTile);\n if (state == TileState.ERROR) {\n errorSourceTiles[uid] = true;\n } else {\n --leftToLoad;\n delete errorSourceTiles[uid];\n }\n if (leftToLoad - Object.keys(errorSourceTiles).length == 0) {\n this.finishLoading_();\n }\n }\n }.bind(this));\n this.loadListenerKeys_.push(key);\n ++leftToLoad;\n }\n }.bind(this));\n }\n if (leftToLoad - Object.keys(errorSourceTiles).length == 0) {\n setTimeout(this.finishLoading_.bind(this), 0);\n }\n};\n\n\n/**\n * @private\n */\nVectorImageTile.prototype.finishLoading_ = function() {\n let loaded = this.tileKeys.length;\n let empty = 0;\n for (let i = loaded - 1; i >= 0; --i) {\n const state = this.getTile(this.tileKeys[i]).getState();\n if (state != TileState.LOADED) {\n --loaded;\n }\n if (state == TileState.EMPTY) {\n ++empty;\n }\n }\n if (loaded == this.tileKeys.length) {\n this.loadListenerKeys_.forEach(unlistenByKey);\n this.loadListenerKeys_.length = 0;\n this.setState(TileState.LOADED);\n } else {\n this.setState(empty == this.tileKeys.length ? TileState.EMPTY : TileState.ERROR);\n }\n};\n\nexport default VectorImageTile;\n\n/**\n * Sets the loader for a tile.\n * @param {module:ol/VectorTile} tile Vector tile.\n * @param {string} url URL.\n */\nexport function defaultLoadFunction(tile, url) {\n const loader = loadFeaturesXhr(url, tile.getFormat(), tile.onLoad.bind(tile), tile.onError.bind(tile));\n tile.setLoader(loader);\n}\n","/**\n * @module ol/source/VectorTile\n */\nimport {inherits} from '../util.js';\nimport TileState from '../TileState.js';\nimport VectorImageTile, {defaultLoadFunction} from '../VectorImageTile.js';\nimport Tile from '../VectorTile.js';\nimport {toSize} from '../size.js';\nimport UrlTile from '../source/UrlTile.js';\nimport {getKeyZXY} from '../tilecoord.js';\nimport {createXYZ, extentFromProjection, createForProjection} from '../tilegrid.js';\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize=128] Cache size.\n * @property {module:ol/format/Feature} [format] Feature format for tiles. Used and required by the default.\n * @property {boolean} [overlaps=true] This source may have overlapping geometries. Setting this\n * to `false` (e.g. for sources with polygons that represent administrative\n * boundaries or TopoJSON sources) allows the renderer to optimise fill and\n * stroke operations.\n * @property {module:ol/proj~ProjectionLike} projection Projection.\n * @property {module:ol/source/State} [state] Source state.\n * @property {module:ol/VectorTile~TileClass} [tileClass] Class used to instantiate image tiles.\n * Default is {@link module:ol/VectorTile}.\n * @property {number} [maxZoom=22] Optional max zoom level.\n * @property {number} [minZoom] Optional min zoom level.\n * @property {number|module:ol/size~Size} [tileSize=512] Optional tile size.\n * @property {module:ol/tilegrid/TileGrid} [tileGrid] Tile grid.\n * @property {module:ol/Tile~LoadFunction} [tileLoadFunction]\n * Optional function to load a tile given a URL. Could look like this:\n * ```js\n * function(tile, url) {\n * tile.setLoader(function() {\n * var data = // ... fetch data\n * var format = tile.getFormat();\n * tile.setProjection(format.readProjection(data));\n * tile.setFeatures(format.readFeatures(data, {\n * // featureProjection is not required for ol/format/MVT\n * featureProjection: map.getView().getProjection()\n * }));\n * // the line below is only required for ol/format/MVT\n * tile.setExtent(format.getLastExtent());\n * };\n * });\n * ```\n * @property {module:ol/Tile~UrlFunction} [tileUrlFunction] Optional function to get tile URL given a tile coordinate and the projection.\n * @property {string} [url] URL template. Must include `{x}`, `{y}` or `{-y}`, and `{z}` placeholders.\n * A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`, may be\n * used instead of defining each one separately in the `urls` option.\n * @property {number} [transition] A duration for tile opacity\n * transitions in milliseconds. A duration of 0 disables the opacity transition.\n * @property {Array.<string>} [urls] An array of URL templates.\n * @property {boolean} [wrapX=true] Whether to wrap the world horizontally.\n * When set to `false`, only one world\n * will be rendered. When set to `true`, tiles will be wrapped horizontally to\n * render multiple worlds.\n */\n\n\n/**\n * @classdesc\n * Class for layer sources providing vector data divided into a tile grid, to be\n * used with {@link module:ol/layer/VectorTile~VectorTile}. Although this source receives tiles\n * with vector features from the server, it is not meant for feature editing.\n * Features are optimized for rendering, their geometries are clipped at or near\n * tile boundaries and simplified for a view resolution. See\n * {@link module:ol/source/Vector} for vector sources that are suitable for feature\n * editing.\n *\n * @constructor\n * @fires module:ol/source/Tile~TileSourceEvent\n * @extends {module:ol/source/UrlTile}\n * @param {module:ol/source/VectorTile~Options=} options Vector tile options.\n * @api\n */\nconst VectorTile = function(options) {\n const projection = options.projection || 'EPSG:3857';\n\n const extent = options.extent || extentFromProjection(projection);\n\n const tileGrid = options.tileGrid || createXYZ({\n extent: extent,\n maxZoom: options.maxZoom || 22,\n minZoom: options.minZoom,\n tileSize: options.tileSize || 512\n });\n\n UrlTile.call(this, {\n attributions: options.attributions,\n cacheSize: options.cacheSize !== undefined ? options.cacheSize : 128,\n extent: extent,\n opaque: false,\n projection: projection,\n state: options.state,\n tileGrid: tileGrid,\n tileLoadFunction: options.tileLoadFunction ? options.tileLoadFunction : defaultLoadFunction,\n tileUrlFunction: options.tileUrlFunction,\n url: options.url,\n urls: options.urls,\n wrapX: options.wrapX === undefined ? true : options.wrapX,\n transition: options.transition\n });\n\n /**\n * @private\n * @type {module:ol/format/Feature}\n */\n this.format_ = options.format ? options.format : null;\n\n /**\n * @private\n * @type {Object.<string, module:ol/VectorTile>}\n */\n this.sourceTiles_ = {};\n\n /**\n * @private\n * @type {boolean}\n */\n this.overlaps_ = options.overlaps == undefined ? true : options.overlaps;\n\n /**\n * @protected\n * @type {function(new: module:ol/VectorTile, module:ol/tilecoord~TileCoord, module:ol/TileState, string,\n * module:ol/format/Feature, module:ol/Tile~LoadFunction)}\n */\n this.tileClass = options.tileClass ? options.tileClass : Tile;\n\n /**\n * @private\n * @type {Object.<string, module:ol/tilegrid/TileGrid>}\n */\n this.tileGrids_ = {};\n\n};\n\ninherits(VectorTile, UrlTile);\n\n\n/**\n * @return {boolean} The source can have overlapping geometries.\n */\nVectorTile.prototype.getOverlaps = function() {\n return this.overlaps_;\n};\n\n/**\n * clear {@link module:ol/TileCache~TileCache} and delete all source tiles\n * @api\n */\nVectorTile.prototype.clear = function() {\n this.tileCache.clear();\n this.sourceTiles_ = {};\n};\n\n/**\n * @inheritDoc\n */\nVectorTile.prototype.getTile = function(z, x, y, pixelRatio, projection) {\n const tileCoordKey = getKeyZXY(z, x, y);\n if (this.tileCache.containsKey(tileCoordKey)) {\n return (\n /** @type {!module:ol/Tile} */ (this.tileCache.get(tileCoordKey))\n );\n } else {\n const tileCoord = [z, x, y];\n const urlTileCoord = this.getTileCoordForTileUrlFunction(\n tileCoord, projection);\n const tile = new VectorImageTile(\n tileCoord,\n urlTileCoord !== null ? TileState.IDLE : TileState.EMPTY,\n this.getRevision(),\n this.format_, this.tileLoadFunction, urlTileCoord, this.tileUrlFunction,\n this.tileGrid, this.getTileGridForProjection(projection),\n this.sourceTiles_, pixelRatio, projection, this.tileClass,\n this.handleTileChange.bind(this), tileCoord[0]);\n\n this.tileCache.set(tileCoordKey, tile);\n return tile;\n }\n};\n\n\n/**\n * @inheritDoc\n */\nVectorTile.prototype.getTileGridForProjection = function(projection) {\n const code = projection.getCode();\n let tileGrid = this.tileGrids_[code];\n if (!tileGrid) {\n // A tile grid that matches the tile size of the source tile grid is more\n // likely to have 1:1 relationships between source tiles and rendered tiles.\n const sourceTileGrid = this.tileGrid;\n tileGrid = this.tileGrids_[code] = createForProjection(projection, undefined,\n sourceTileGrid ? sourceTileGrid.getTileSize(sourceTileGrid.getMinZoom()) : undefined);\n }\n return tileGrid;\n};\n\n\n/**\n * @inheritDoc\n */\nVectorTile.prototype.getTilePixelRatio = function(pixelRatio) {\n return pixelRatio;\n};\n\n\n/**\n * @inheritDoc\n */\nVectorTile.prototype.getTilePixelSize = function(z, pixelRatio, projection) {\n const tileGrid = this.getTileGridForProjection(projection);\n const tileSize = toSize(tileGrid.getTileSize(z), this.tmpSize);\n return [Math.round(tileSize[0] * pixelRatio), Math.round(tileSize[1] * pixelRatio)];\n};\nexport default VectorTile;\n","/**\n * @module ol/source/WMTSRequestEncoding\n */\n\n/**\n * Request encoding. One of 'KVP', 'REST'.\n * @enum {string}\n */\nexport default {\n KVP: 'KVP', // see spec §8\n REST: 'REST' // see spec §10\n};\n","/**\n * @module ol/tilegrid/WMTS\n */\nimport {inherits} from '../util.js';\nimport {find} from '../array.js';\nimport {get as getProjection} from '../proj.js';\nimport TileGrid from '../tilegrid/TileGrid.js';\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/extent~Extent} [extent] Extent for the tile grid. No tiles\n * outside this extent will be requested by {@link module:ol/source/Tile} sources.\n * When no `origin` or `origins` are configured, the `origin` will be set to the\n * top-left corner of the extent.\n * @property {module:ol/coordinate~Coordinate} [origin] The tile grid origin, i.e.\n * where the `x` and `y` axes meet (`[z, 0, 0]`). Tile coordinates increase left\n * to right and upwards. If not specified, `extent` or `origins` must be provided.\n * @property {Array.<module:ol/coordinate~Coordinate>} [origins] Tile grid origins,\n * i.e. where the `x` and `y` axes meet (`[z, 0, 0]`), for each zoom level. If\n * given, the array length should match the length of the `resolutions` array, i.e.\n * each resolution can have a different origin. Tile coordinates increase left to\n * right and upwards. If not specified, `extent` or `origin` must be provided.\n * @property {!Array.<number>} resolutions Resolutions. The array index of each\n * resolution needs to match the zoom level. This means that even if a `minZoom`\n * is configured, the resolutions array will have a length of `maxZoom + 1`\n * @property {!Array.<string>} matrixIds matrix IDs. The length of this array needs\n * to match the length of the `resolutions` array.\n * @property {Array.<module:ol/size~Size>} [sizes] Number of tile rows and columns\n * of the grid for each zoom level. The values here are the `TileMatrixWidth` and\n * `TileMatrixHeight` advertised in the GetCapabilities response of the WMTS, and\n * define the grid's extent together with the `origin`.\n * An `extent` can be configured in addition, and will further limit the extent for\n * which tile requests are made by sources. Note that when the top-left corner of\n * the `extent` is used as `origin` or `origins`, then the `y` value must be\n * negative because OpenLayers tile coordinates increase upwards.\n * @property {number|module:ol/size~Size} [tileSize] Tile size.\n * @property {Array.<module:ol/size~Size>} [tileSizes] Tile sizes. The length of\n * this array needs to match the length of the `resolutions` array.\n * @property {Array.<number>} [widths] Number of tile columns that cover the grid's\n * extent for each zoom level. Only required when used with a source that has `wrapX`\n * set to `true`, and only when the grid's origin differs from the one of the\n * projection's extent. The array length has to match the length of the `resolutions`\n * array, i.e. each resolution will have a matching entry here.\n */\n\n\n/**\n * @classdesc\n * Set the grid pattern for sources accessing WMTS tiled-image servers.\n *\n * @constructor\n * @extends {module:ol/tilegrid/TileGrid}\n * @param {module:ol/tilegrid/WMTS~Options} options WMTS options.\n * @struct\n * @api\n */\nconst WMTSTileGrid = function(options) {\n /**\n * @private\n * @type {!Array.<string>}\n */\n this.matrixIds_ = options.matrixIds;\n // FIXME: should the matrixIds become optional?\n\n TileGrid.call(this, {\n extent: options.extent,\n origin: options.origin,\n origins: options.origins,\n resolutions: options.resolutions,\n tileSize: options.tileSize,\n tileSizes: options.tileSizes,\n sizes: options.sizes\n });\n};\n\ninherits(WMTSTileGrid, TileGrid);\n\n\n/**\n * @param {number} z Z.\n * @return {string} MatrixId..\n */\nWMTSTileGrid.prototype.getMatrixId = function(z) {\n return this.matrixIds_[z];\n};\n\n\n/**\n * Get the list of matrix identifiers.\n * @return {Array.<string>} MatrixIds.\n * @api\n */\nWMTSTileGrid.prototype.getMatrixIds = function() {\n return this.matrixIds_;\n};\n\nexport default WMTSTileGrid;\n\n/**\n * Create a tile grid from a WMTS capabilities matrix set and an\n * optional TileMatrixSetLimits.\n * @param {Object} matrixSet An object representing a matrixSet in the\n * capabilities document.\n * @param {module:ol/extent~Extent=} opt_extent An optional extent to restrict the tile\n * ranges the server provides.\n * @param {Array.<Object>=} opt_matrixLimits An optional object representing\n * the available matrices for tileGrid.\n * @return {module:ol/tilegrid/WMTS} WMTS tileGrid instance.\n * @api\n */\nexport function createFromCapabilitiesMatrixSet(matrixSet, opt_extent, opt_matrixLimits) {\n\n /** @type {!Array.<number>} */\n const resolutions = [];\n /** @type {!Array.<string>} */\n const matrixIds = [];\n /** @type {!Array.<module:ol/coordinate~Coordinate>} */\n const origins = [];\n /** @type {!Array.<module:ol/size~Size>} */\n const tileSizes = [];\n /** @type {!Array.<module:ol/size~Size>} */\n const sizes = [];\n\n const matrixLimits = opt_matrixLimits !== undefined ? opt_matrixLimits : [];\n\n const supportedCRSPropName = 'SupportedCRS';\n const matrixIdsPropName = 'TileMatrix';\n const identifierPropName = 'Identifier';\n const scaleDenominatorPropName = 'ScaleDenominator';\n const topLeftCornerPropName = 'TopLeftCorner';\n const tileWidthPropName = 'TileWidth';\n const tileHeightPropName = 'TileHeight';\n\n const code = matrixSet[supportedCRSPropName];\n const projection = getProjection(code.replace(/urn:ogc:def:crs:(\\w+):(.*:)?(\\w+)$/, '$1:$3')) ||\n getProjection(code);\n const metersPerUnit = projection.getMetersPerUnit();\n // swap origin x and y coordinates if axis orientation is lat/long\n const switchOriginXY = projection.getAxisOrientation().substr(0, 2) == 'ne';\n\n matrixSet[matrixIdsPropName].sort(function(a, b) {\n return b[scaleDenominatorPropName] - a[scaleDenominatorPropName];\n });\n\n matrixSet[matrixIdsPropName].forEach(function(elt) {\n\n let matrixAvailable;\n // use of matrixLimits to filter TileMatrices from GetCapabilities\n // TileMatrixSet from unavailable matrix levels.\n if (matrixLimits.length > 0) {\n matrixAvailable = find(matrixLimits, function(elt_ml) {\n if (elt[identifierPropName] == elt_ml[matrixIdsPropName]) {\n return true;\n }\n // Fallback for tileMatrix identifiers that don't get prefixed\n // by their tileMatrixSet identifiers.\n if (elt[identifierPropName].indexOf(':') === -1) {\n return matrixSet[identifierPropName] + ':' + elt[identifierPropName] === elt_ml[matrixIdsPropName];\n }\n return false;\n });\n } else {\n matrixAvailable = true;\n }\n\n if (matrixAvailable) {\n matrixIds.push(elt[identifierPropName]);\n const resolution = elt[scaleDenominatorPropName] * 0.28E-3 / metersPerUnit;\n const tileWidth = elt[tileWidthPropName];\n const tileHeight = elt[tileHeightPropName];\n if (switchOriginXY) {\n origins.push([elt[topLeftCornerPropName][1],\n elt[topLeftCornerPropName][0]]);\n } else {\n origins.push(elt[topLeftCornerPropName]);\n }\n resolutions.push(resolution);\n tileSizes.push(tileWidth == tileHeight ?\n tileWidth : [tileWidth, tileHeight]);\n // top-left origin, so height is negative\n sizes.push([elt['MatrixWidth'], -elt['MatrixHeight']]);\n }\n });\n\n return new WMTSTileGrid({\n extent: opt_extent,\n origins: origins,\n resolutions: resolutions,\n matrixIds: matrixIds,\n tileSizes: tileSizes,\n sizes: sizes\n });\n}\n","/**\n * @module ol/source/WMTS\n */\nimport {inherits} from '../util.js';\nimport {expandUrl, createFromTileUrlFunctions, nullTileUrlFunction} from '../tileurlfunction.js';\nimport {find, findIndex, includes} from '../array.js';\nimport {containsExtent} from '../extent.js';\nimport {assign} from '../obj.js';\nimport {get as getProjection, equivalent, transformExtent} from '../proj.js';\nimport TileImage from '../source/TileImage.js';\nimport WMTSRequestEncoding from '../source/WMTSRequestEncoding.js';\nimport {createFromCapabilitiesMatrixSet} from '../tilegrid/WMTS.js';\nimport {appendParams} from '../uri.js';\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer. See\n * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.\n * @property {module:ol/tilegrid/WMTS} tileGrid Tile grid.\n * @property {module:ol/proj~ProjectionLike} projection Projection.\n * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {module:ol/source/WMTSRequestEncoding|string} [requestEncoding='KVP'] Request encoding.\n * @property {string} layer Layer name as advertised in the WMTS capabilities.\n * @property {string} style Style name as advertised in the WMTS capabilities.\n * @property {module:ol/ImageTile~TileClass} [tileClass] Class used to instantiate image tiles. Default is {@link module:ol/ImageTile~ImageTile}.\n * @property {number} [tilePixelRatio=1] The pixel ratio used by the tile service.\n * For example, if the tile service advertizes 256px by 256px tiles but actually sends 512px\n * by 512px images (for retina/hidpi devices) then `tilePixelRatio`\n * should be set to `2`.\n * @property {string} [version='image/jpeg'] Image format.\n * @property {string} [format='1.0.0'] WMTS version.\n * @property {string} matrixSet Matrix set.\n * @property {!Object} [dimensions] Additional \"dimensions\" for tile requests.\n * This is an object with properties named like the advertised WMTS dimensions.\n * @property {string} [url] A URL for the service.\n * For the RESTful request encoding, this is a URL\n * template. For KVP encoding, it is normal URL. A `{?-?}` template pattern,\n * for example `subdomain{a-f}.domain.com`, may be used instead of defining\n * each one separately in the `urls` option.\n * @property {module:ol/Tile~LoadFunction} [tileLoadFunction] Optional function to load a tile given a URL. The default is\n * ```js\n * function(imageTile, src) {\n * imageTile.getImage().src = src;\n * };\n * ```\n * @property {Array.<string>} [urls] An array of URLs.\n * Requests will be distributed among the URLs in this array.\n * @property {boolean} [wrapX=false] Whether to wrap the world horizontally.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n */\n\n\n/**\n * @classdesc\n * Layer source for tile data from WMTS servers.\n *\n * @constructor\n * @extends {module:ol/source/TileImage}\n * @param {module:ol/source/WMTS~Options=} options WMTS options.\n * @api\n */\nconst WMTS = function(options) {\n\n // TODO: add support for TileMatrixLimits\n\n /**\n * @private\n * @type {string}\n */\n this.version_ = options.version !== undefined ? options.version : '1.0.0';\n\n /**\n * @private\n * @type {string}\n */\n this.format_ = options.format !== undefined ? options.format : 'image/jpeg';\n\n /**\n * @private\n * @type {!Object}\n */\n this.dimensions_ = options.dimensions !== undefined ? options.dimensions : {};\n\n /**\n * @private\n * @type {string}\n */\n this.layer_ = options.layer;\n\n /**\n * @private\n * @type {string}\n */\n this.matrixSet_ = options.matrixSet;\n\n /**\n * @private\n * @type {string}\n */\n this.style_ = options.style;\n\n let urls = options.urls;\n if (urls === undefined && options.url !== undefined) {\n urls = expandUrl(options.url);\n }\n\n // FIXME: should we guess this requestEncoding from options.url(s)\n // structure? that would mean KVP only if a template is not provided.\n\n /**\n * @private\n * @type {module:ol/source/WMTSRequestEncoding}\n */\n this.requestEncoding_ = options.requestEncoding !== undefined ?\n /** @type {module:ol/source/WMTSRequestEncoding} */ (options.requestEncoding) :\n WMTSRequestEncoding.KVP;\n\n const requestEncoding = this.requestEncoding_;\n\n // FIXME: should we create a default tileGrid?\n // we could issue a getCapabilities xhr to retrieve missing configuration\n const tileGrid = options.tileGrid;\n\n // context property names are lower case to allow for a case insensitive\n // replacement as some services use different naming conventions\n const context = {\n 'layer': this.layer_,\n 'style': this.style_,\n 'tilematrixset': this.matrixSet_\n };\n\n if (requestEncoding == WMTSRequestEncoding.KVP) {\n assign(context, {\n 'Service': 'WMTS',\n 'Request': 'GetTile',\n 'Version': this.version_,\n 'Format': this.format_\n });\n }\n\n const dimensions = this.dimensions_;\n\n /**\n * @param {string} template Template.\n * @return {module:ol/Tile~UrlFunction} Tile URL function.\n * @private\n */\n this.createFromWMTSTemplate_ = function(template) {\n\n // TODO: we may want to create our own appendParams function so that params\n // order conforms to wmts spec guidance, and so that we can avoid to escape\n // special template params\n\n template = (requestEncoding == WMTSRequestEncoding.KVP) ?\n appendParams(template, context) :\n template.replace(/\\{(\\w+?)\\}/g, function(m, p) {\n return (p.toLowerCase() in context) ? context[p.toLowerCase()] : m;\n });\n\n return (\n /**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {string|undefined} Tile URL.\n */\n function(tileCoord, pixelRatio, projection) {\n if (!tileCoord) {\n return undefined;\n } else {\n const localContext = {\n 'TileMatrix': tileGrid.getMatrixId(tileCoord[0]),\n 'TileCol': tileCoord[1],\n 'TileRow': -tileCoord[2] - 1\n };\n assign(localContext, dimensions);\n let url = template;\n if (requestEncoding == WMTSRequestEncoding.KVP) {\n url = appendParams(url, localContext);\n } else {\n url = url.replace(/\\{(\\w+?)\\}/g, function(m, p) {\n return localContext[p];\n });\n }\n return url;\n }\n }\n );\n };\n\n const tileUrlFunction = (urls && urls.length > 0) ?\n createFromTileUrlFunctions(urls.map(this.createFromWMTSTemplate_)) : nullTileUrlFunction;\n\n TileImage.call(this, {\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n projection: options.projection,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileClass: options.tileClass,\n tileGrid: tileGrid,\n tileLoadFunction: options.tileLoadFunction,\n tilePixelRatio: options.tilePixelRatio,\n tileUrlFunction: tileUrlFunction,\n urls: urls,\n wrapX: options.wrapX !== undefined ? options.wrapX : false,\n transition: options.transition\n });\n\n this.setKey(this.getKeyForDimensions_());\n\n};\n\ninherits(WMTS, TileImage);\n\n/**\n * Set the URLs to use for requests.\n * URLs may contain OCG conform URL Template Variables: {TileMatrix}, {TileRow}, {TileCol}.\n * @override\n */\nWMTS.prototype.setUrls = function(urls) {\n this.urls = urls;\n const key = urls.join('\\n');\n this.setTileUrlFunction(this.fixedTileUrlFunction ?\n this.fixedTileUrlFunction.bind(this) :\n createFromTileUrlFunctions(urls.map(this.createFromWMTSTemplate_.bind(this))), key);\n};\n\n/**\n * Get the dimensions, i.e. those passed to the constructor through the\n * \"dimensions\" option, and possibly updated using the updateDimensions\n * method.\n * @return {!Object} Dimensions.\n * @api\n */\nWMTS.prototype.getDimensions = function() {\n return this.dimensions_;\n};\n\n\n/**\n * Return the image format of the WMTS source.\n * @return {string} Format.\n * @api\n */\nWMTS.prototype.getFormat = function() {\n return this.format_;\n};\n\n\n/**\n * Return the layer of the WMTS source.\n * @return {string} Layer.\n * @api\n */\nWMTS.prototype.getLayer = function() {\n return this.layer_;\n};\n\n\n/**\n * Return the matrix set of the WMTS source.\n * @return {string} MatrixSet.\n * @api\n */\nWMTS.prototype.getMatrixSet = function() {\n return this.matrixSet_;\n};\n\n\n/**\n * Return the request encoding, either \"KVP\" or \"REST\".\n * @return {module:ol/source/WMTSRequestEncoding} Request encoding.\n * @api\n */\nWMTS.prototype.getRequestEncoding = function() {\n return this.requestEncoding_;\n};\n\n\n/**\n * Return the style of the WMTS source.\n * @return {string} Style.\n * @api\n */\nWMTS.prototype.getStyle = function() {\n return this.style_;\n};\n\n\n/**\n * Return the version of the WMTS source.\n * @return {string} Version.\n * @api\n */\nWMTS.prototype.getVersion = function() {\n return this.version_;\n};\n\n\n/**\n * @private\n * @return {string} The key for the current dimensions.\n */\nWMTS.prototype.getKeyForDimensions_ = function() {\n let i = 0;\n const res = [];\n for (const key in this.dimensions_) {\n res[i++] = key + '-' + this.dimensions_[key];\n }\n return res.join('/');\n};\n\n\n/**\n * Update the dimensions.\n * @param {Object} dimensions Dimensions.\n * @api\n */\nWMTS.prototype.updateDimensions = function(dimensions) {\n assign(this.dimensions_, dimensions);\n this.setKey(this.getKeyForDimensions_());\n};\n\n\n/**\n * Generate source options from a capabilities object.\n * @param {Object} wmtsCap An object representing the capabilities document.\n * @param {!Object} config Configuration properties for the layer. Defaults for\n * the layer will apply if not provided.\n *\n * Required config properties:\n * - layer - {string} The layer identifier.\n *\n * Optional config properties:\n * - matrixSet - {string} The matrix set identifier, required if there is\n * more than one matrix set in the layer capabilities.\n * - projection - {string} The desired CRS when no matrixSet is specified.\n * eg: \"EPSG:3857\". If the desired projection is not available,\n * an error is thrown.\n * - requestEncoding - {string} url encoding format for the layer. Default is\n * the first tile url format found in the GetCapabilities response.\n * - style - {string} The name of the style\n * - format - {string} Image format for the layer. Default is the first\n * format returned in the GetCapabilities response.\n * - crossOrigin - {string|null|undefined} Cross origin. Default is `undefined`.\n * @return {?module:ol/source/WMTS~Options} WMTS source options object or `null` if the layer was not found.\n * @api\n */\nexport function optionsFromCapabilities(wmtsCap, config) {\n const layers = wmtsCap['Contents']['Layer'];\n const l = find(layers, function(elt, index, array) {\n return elt['Identifier'] == config['layer'];\n });\n if (l === null) {\n return null;\n }\n const tileMatrixSets = wmtsCap['Contents']['TileMatrixSet'];\n let idx;\n if (l['TileMatrixSetLink'].length > 1) {\n if ('projection' in config) {\n idx = findIndex(l['TileMatrixSetLink'],\n function(elt, index, array) {\n const tileMatrixSet = find(tileMatrixSets, function(el) {\n return el['Identifier'] == elt['TileMatrixSet'];\n });\n const supportedCRS = tileMatrixSet['SupportedCRS'];\n const proj1 = getProjection(supportedCRS.replace(/urn:ogc:def:crs:(\\w+):(.*:)?(\\w+)$/, '$1:$3')) ||\n getProjection(supportedCRS);\n const proj2 = getProjection(config['projection']);\n if (proj1 && proj2) {\n return equivalent(proj1, proj2);\n } else {\n return supportedCRS == config['projection'];\n }\n });\n } else {\n idx = findIndex(l['TileMatrixSetLink'],\n function(elt, index, array) {\n return elt['TileMatrixSet'] == config['matrixSet'];\n });\n }\n } else {\n idx = 0;\n }\n if (idx < 0) {\n idx = 0;\n }\n const matrixSet = /** @type {string} */\n (l['TileMatrixSetLink'][idx]['TileMatrixSet']);\n const matrixLimits = /** @type {Array.<Object>} */\n (l['TileMatrixSetLink'][idx]['TileMatrixSetLimits']);\n\n let format = /** @type {string} */ (l['Format'][0]);\n if ('format' in config) {\n format = config['format'];\n }\n idx = findIndex(l['Style'], function(elt, index, array) {\n if ('style' in config) {\n return elt['Title'] == config['style'];\n } else {\n return elt['isDefault'];\n }\n });\n if (idx < 0) {\n idx = 0;\n }\n const style = /** @type {string} */ (l['Style'][idx]['Identifier']);\n\n const dimensions = {};\n if ('Dimension' in l) {\n l['Dimension'].forEach(function(elt, index, array) {\n const key = elt['Identifier'];\n let value = elt['Default'];\n if (value === undefined) {\n value = elt['Value'][0];\n }\n dimensions[key] = value;\n });\n }\n\n const matrixSets = wmtsCap['Contents']['TileMatrixSet'];\n const matrixSetObj = find(matrixSets, function(elt, index, array) {\n return elt['Identifier'] == matrixSet;\n });\n\n let projection;\n const code = matrixSetObj['SupportedCRS'];\n if (code) {\n projection = getProjection(code.replace(/urn:ogc:def:crs:(\\w+):(.*:)?(\\w+)$/, '$1:$3')) ||\n getProjection(code);\n }\n if ('projection' in config) {\n const projConfig = getProjection(config['projection']);\n if (projConfig) {\n if (!projection || equivalent(projConfig, projection)) {\n projection = projConfig;\n }\n }\n }\n\n const wgs84BoundingBox = l['WGS84BoundingBox'];\n let extent, wrapX;\n if (wgs84BoundingBox !== undefined) {\n const wgs84ProjectionExtent = getProjection('EPSG:4326').getExtent();\n wrapX = (wgs84BoundingBox[0] == wgs84ProjectionExtent[0] &&\n wgs84BoundingBox[2] == wgs84ProjectionExtent[2]);\n extent = transformExtent(\n wgs84BoundingBox, 'EPSG:4326', projection);\n const projectionExtent = projection.getExtent();\n if (projectionExtent) {\n // If possible, do a sanity check on the extent - it should never be\n // bigger than the validity extent of the projection of a matrix set.\n if (!containsExtent(projectionExtent, extent)) {\n extent = undefined;\n }\n }\n }\n\n const tileGrid = createFromCapabilitiesMatrixSet(matrixSetObj, extent, matrixLimits);\n\n /** @type {!Array.<string>} */\n const urls = [];\n let requestEncoding = config['requestEncoding'];\n requestEncoding = requestEncoding !== undefined ? requestEncoding : '';\n\n if ('OperationsMetadata' in wmtsCap && 'GetTile' in wmtsCap['OperationsMetadata']) {\n const gets = wmtsCap['OperationsMetadata']['GetTile']['DCP']['HTTP']['Get'];\n\n for (let i = 0, ii = gets.length; i < ii; ++i) {\n if (gets[i]['Constraint']) {\n const constraint = find(gets[i]['Constraint'], function(element) {\n return element['name'] == 'GetEncoding';\n });\n const encodings = constraint['AllowedValues']['Value'];\n\n if (requestEncoding === '') {\n // requestEncoding not provided, use the first encoding from the list\n requestEncoding = encodings[0];\n }\n if (requestEncoding === WMTSRequestEncoding.KVP) {\n if (includes(encodings, WMTSRequestEncoding.KVP)) {\n urls.push(/** @type {string} */ (gets[i]['href']));\n }\n } else {\n break;\n }\n } else if (gets[i]['href']) {\n requestEncoding = WMTSRequestEncoding.KVP;\n urls.push(/** @type {string} */ (gets[i]['href']));\n }\n }\n }\n if (urls.length === 0) {\n requestEncoding = WMTSRequestEncoding.REST;\n l['ResourceURL'].forEach(function(element) {\n if (element['resourceType'] === 'tile') {\n format = element['format'];\n urls.push(/** @type {string} */ (element['template']));\n }\n });\n }\n\n return {\n urls: urls,\n layer: config['layer'],\n matrixSet: matrixSet,\n format: format,\n projection: projection,\n requestEncoding: requestEncoding,\n tileGrid: tileGrid,\n style: style,\n dimensions: dimensions,\n wrapX: wrapX,\n crossOrigin: config['crossOrigin']\n };\n}\n\nexport default WMTS;\n","/**\n * @module ol/source/Zoomify\n */\nimport {DEFAULT_TILE_SIZE} from '../tilegrid/common.js';\nimport {inherits} from '../util.js';\nimport ImageTile from '../ImageTile.js';\nimport TileState from '../TileState.js';\nimport {expandUrl, createFromTileUrlFunctions} from '../tileurlfunction.js';\nimport {assert} from '../asserts.js';\nimport {createCanvasContext2D} from '../dom.js';\nimport {getTopLeft} from '../extent.js';\nimport {toSize} from '../size.js';\nimport TileImage from '../source/TileImage.js';\nimport TileGrid from '../tilegrid/TileGrid.js';\n\n\n/**\n * @enum {string}\n */\nconst TierSizeCalculation = {\n DEFAULT: 'default',\n TRUNCATED: 'truncated'\n};\n\n\n/**\n * @constructor\n * @extends {module:ol/ImageTile}\n * @param {module:ol/tilegrid/TileGrid} tileGrid TileGrid that the tile belongs to.\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile coordinate.\n * @param {module:ol/TileState} state State.\n * @param {string} src Image source URI.\n * @param {?string} crossOrigin Cross origin.\n * @param {module:ol/Tile~LoadFunction} tileLoadFunction Tile load function.\n * @param {module:ol/Tile~Options=} opt_options Tile options.\n */\nexport const CustomTile = function(\n tileGrid, tileCoord, state, src, crossOrigin, tileLoadFunction, opt_options) {\n\n ImageTile.call(this, tileCoord, state, src, crossOrigin, tileLoadFunction, opt_options);\n\n /**\n * @private\n * @type {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement}\n */\n this.zoomifyImage_ = null;\n\n /**\n * @private\n * @type {module:ol/size~Size}\n */\n this.tileSize_ = toSize(tileGrid.getTileSize(tileCoord[0]));\n};\ninherits(CustomTile, ImageTile);\n\n\n/**\n * @inheritDoc\n */\nCustomTile.prototype.getImage = function() {\n if (this.zoomifyImage_) {\n return this.zoomifyImage_;\n }\n const image = ImageTile.prototype.getImage.call(this);\n if (this.state == TileState.LOADED) {\n const tileSize = this.tileSize_;\n if (image.width == tileSize[0] && image.height == tileSize[1]) {\n this.zoomifyImage_ = image;\n return image;\n } else {\n const context = createCanvasContext2D(tileSize[0], tileSize[1]);\n context.drawImage(image, 0, 0);\n this.zoomifyImage_ = context.canvas;\n return context.canvas;\n }\n } else {\n return image;\n }\n};\n\n\n/**\n * @typedef {Object} Options\n * @property {module:ol/source/Source~AttributionLike} [attributions] Attributions.\n * @property {number} [cacheSize=2048] Cache size.\n * @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that\n * you must provide a `crossOrigin` value if you are using the WebGL renderer or if you want to\n * access pixel data with the Canvas renderer. See\n * {@link https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image} for more detail.\n * @property {module:ol/proj~ProjectionLike} [projection] Projection.\n * @property {boolean} [reprojectionErrorThreshold=0.5] Maximum allowed reprojection error (in pixels).\n * Higher values can increase reprojection performance, but decrease precision.\n * @property {string} [url] URL template or base URL of the Zoomify service.\n * A base URL is the fixed part\n * of the URL, excluding the tile group, z, x, and y folder structure, e.g.\n * `http://my.zoomify.info/IMAGE.TIF/`. A URL template must include\n * `{TileGroup}`, `{x}`, `{y}`, and `{z}` placeholders, e.g.\n * `http://my.zoomify.info/IMAGE.TIF/{TileGroup}/{z}-{x}-{y}.jpg`.\n * Internet Imaging Protocol (IIP) with JTL extension can be also used with\n * `{tileIndex}` and `{z}` placeholders, e.g.\n * `http://my.zoomify.info?FIF=IMAGE.TIF&JTL={z},{tileIndex}`.\n * A `{?-?}` template pattern, for example `subdomain{a-f}.domain.com`, may be\n * used instead of defining each one separately in the `urls` option.\n * @property {string} [tierSizeCalculation] Tier size calculation method: `default` or `truncated`.\n * @property {module:ol/size~Size} [size] Size of the image.\n * @property {module:ol/extent~Extent} [extent] Extent for the TileGrid that is created.\n * Default sets the TileGrid in the\n * fourth quadrant, meaning extent is `[0, -height, width, 0]`. To change the\n * extent to the first quadrant (the default for OpenLayers 2) set the extent\n * as `[0, 0, width, height]`.\n * @property {number} [transition] Duration of the opacity transition for rendering.\n * To disable the opacity transition, pass `transition: 0`.\n * @property {number} [tileSize=256] Tile size. Same tile size is used for all zoom levels.\n */\n\n\n/**\n * @classdesc\n * Layer source for tile data in Zoomify format (both Zoomify and Internet\n * Imaging Protocol are supported).\n *\n * @constructor\n * @extends {module:ol/source/TileImage}\n * @param {module:ol/source/Zoomify~Options=} opt_options Options.\n * @api\n */\nconst Zoomify = function(opt_options) {\n\n const options = opt_options || {};\n\n const size = options.size;\n const tierSizeCalculation = options.tierSizeCalculation !== undefined ?\n options.tierSizeCalculation :\n TierSizeCalculation.DEFAULT;\n\n const imageWidth = size[0];\n const imageHeight = size[1];\n const extent = options.extent || [0, -size[1], size[0], 0];\n const tierSizeInTiles = [];\n const tileSize = options.tileSize || DEFAULT_TILE_SIZE;\n let tileSizeForTierSizeCalculation = tileSize;\n\n switch (tierSizeCalculation) {\n case TierSizeCalculation.DEFAULT:\n while (imageWidth > tileSizeForTierSizeCalculation || imageHeight > tileSizeForTierSizeCalculation) {\n tierSizeInTiles.push([\n Math.ceil(imageWidth / tileSizeForTierSizeCalculation),\n Math.ceil(imageHeight / tileSizeForTierSizeCalculation)\n ]);\n tileSizeForTierSizeCalculation += tileSizeForTierSizeCalculation;\n }\n break;\n case TierSizeCalculation.TRUNCATED:\n let width = imageWidth;\n let height = imageHeight;\n while (width > tileSizeForTierSizeCalculation || height > tileSizeForTierSizeCalculation) {\n tierSizeInTiles.push([\n Math.ceil(width / tileSizeForTierSizeCalculation),\n Math.ceil(height / tileSizeForTierSizeCalculation)\n ]);\n width >>= 1;\n height >>= 1;\n }\n break;\n default:\n assert(false, 53); // Unknown `tierSizeCalculation` configured\n break;\n }\n\n tierSizeInTiles.push([1, 1]);\n tierSizeInTiles.reverse();\n\n const resolutions = [1];\n const tileCountUpToTier = [0];\n for (let i = 1, ii = tierSizeInTiles.length; i < ii; i++) {\n resolutions.push(1 << i);\n tileCountUpToTier.push(\n tierSizeInTiles[i - 1][0] * tierSizeInTiles[i - 1][1] +\n tileCountUpToTier[i - 1]\n );\n }\n resolutions.reverse();\n\n const tileGrid = new TileGrid({\n tileSize: tileSize,\n extent: extent,\n origin: getTopLeft(extent),\n resolutions: resolutions\n });\n\n let url = options.url;\n if (url && url.indexOf('{TileGroup}') == -1 && url.indexOf('{tileIndex}') == -1) {\n url += '{TileGroup}/{z}-{x}-{y}.jpg';\n }\n const urls = expandUrl(url);\n\n /**\n * @param {string} template Template.\n * @return {module:ol/Tile~UrlFunction} Tile URL function.\n */\n function createFromTemplate(template) {\n\n return (\n /**\n * @param {module:ol/tilecoord~TileCoord} tileCoord Tile Coordinate.\n * @param {number} pixelRatio Pixel ratio.\n * @param {module:ol/proj/Projection} projection Projection.\n * @return {string|undefined} Tile URL.\n */\n function(tileCoord, pixelRatio, projection) {\n if (!tileCoord) {\n return undefined;\n } else {\n const tileCoordZ = tileCoord[0];\n const tileCoordX = tileCoord[1];\n const tileCoordY = -tileCoord[2] - 1;\n const tileIndex =\n tileCoordX +\n tileCoordY * tierSizeInTiles[tileCoordZ][0];\n const tileSize = tileGrid.getTileSize(tileCoordZ);\n const tileGroup = ((tileIndex + tileCountUpToTier[tileCoordZ]) / tileSize) | 0;\n const localContext = {\n 'z': tileCoordZ,\n 'x': tileCoordX,\n 'y': tileCoordY,\n 'tileIndex': tileIndex,\n 'TileGroup': 'TileGroup' + tileGroup\n };\n return template.replace(/\\{(\\w+?)\\}/g, function(m, p) {\n return localContext[p];\n });\n }\n }\n );\n }\n\n const tileUrlFunction = createFromTileUrlFunctions(urls.map(createFromTemplate));\n\n const ZoomifyTileClass = CustomTile.bind(null, tileGrid);\n\n TileImage.call(this, {\n attributions: options.attributions,\n cacheSize: options.cacheSize,\n crossOrigin: options.crossOrigin,\n projection: options.projection,\n reprojectionErrorThreshold: options.reprojectionErrorThreshold,\n tileClass: ZoomifyTileClass,\n tileGrid: tileGrid,\n tileUrlFunction: tileUrlFunction,\n transition: options.transition\n });\n\n};\n\ninherits(Zoomify, TileImage);\n\n\nexport default Zoomify;\n","import $ol$Collection from './ol/Collection.js';\nimport $ol$Feature from './ol/Feature.js';\nimport $ol$Geolocation from './ol/Geolocation.js';\nimport $ol$Graticule from './ol/Graticule.js';\nimport $ol$Image from './ol/Image.js';\nimport $ol$ImageTile from './ol/ImageTile.js';\nimport $ol$Kinetic from './ol/Kinetic.js';\nimport $ol$Map from './ol/Map.js';\nimport $ol$MapBrowserEvent from './ol/MapBrowserEvent.js';\nimport $ol$Object from './ol/Object.js';\nimport $ol$Observable from './ol/Observable.js';\nimport $ol$Overlay from './ol/Overlay.js';\nimport $ol$PluggableMap from './ol/PluggableMap.js';\nimport $ol$Tile from './ol/Tile.js';\nimport $ol$VectorTile from './ol/VectorTile.js';\nimport $ol$View from './ol/View.js';\nimport $ol$WebGLMap from './ol/WebGLMap.js';\nimport $ol$control$Attribution from './ol/control/Attribution.js';\nimport $ol$control$Control from './ol/control/Control.js';\nimport $ol$control$FullScreen from './ol/control/FullScreen.js';\nimport $ol$control$MousePosition from './ol/control/MousePosition.js';\nimport $ol$control$OverviewMap from './ol/control/OverviewMap.js';\nimport $ol$control$Rotate from './ol/control/Rotate.js';\nimport $ol$control$ScaleLine from './ol/control/ScaleLine.js';\nimport $ol$control$Zoom from './ol/control/Zoom.js';\nimport $ol$control$ZoomSlider from './ol/control/ZoomSlider.js';\nimport $ol$control$ZoomToExtent from './ol/control/ZoomToExtent.js';\nimport $ol$events$Event from './ol/events/Event.js';\nimport $ol$format$EsriJSON from './ol/format/EsriJSON.js';\nimport $ol$format$Feature from './ol/format/Feature.js';\nimport $ol$format$GML from './ol/format/GML.js';\nimport $ol$format$GML2 from './ol/format/GML2.js';\nimport $ol$format$GML3 from './ol/format/GML3.js';\nimport $ol$format$GMLBase from './ol/format/GMLBase.js';\nimport $ol$format$GPX from './ol/format/GPX.js';\nimport $ol$format$GeoJSON from './ol/format/GeoJSON.js';\nimport $ol$format$IGC from './ol/format/IGC.js';\nimport $ol$format$KML from './ol/format/KML.js';\nimport $ol$format$MVT from './ol/format/MVT.js';\nimport $ol$format$OSMXML from './ol/format/OSMXML.js';\nimport $ol$format$Polyline from './ol/format/Polyline.js';\nimport $ol$format$TopoJSON from './ol/format/TopoJSON.js';\nimport $ol$format$WFS from './ol/format/WFS.js';\nimport $ol$format$WKT from './ol/format/WKT.js';\nimport $ol$format$WMSCapabilities from './ol/format/WMSCapabilities.js';\nimport $ol$format$WMSGetFeatureInfo from './ol/format/WMSGetFeatureInfo.js';\nimport $ol$format$WMTSCapabilities from './ol/format/WMTSCapabilities.js';\nimport $ol$format$filter$Bbox from './ol/format/filter/Bbox.js';\nimport $ol$format$filter$Contains from './ol/format/filter/Contains.js';\nimport $ol$format$filter$During from './ol/format/filter/During.js';\nimport $ol$format$filter$EqualTo from './ol/format/filter/EqualTo.js';\nimport $ol$format$filter$GreaterThan from './ol/format/filter/GreaterThan.js';\nimport $ol$format$filter$GreaterThanOrEqualTo from './ol/format/filter/GreaterThanOrEqualTo.js';\nimport $ol$format$filter$Intersects from './ol/format/filter/Intersects.js';\nimport $ol$format$filter$IsBetween from './ol/format/filter/IsBetween.js';\nimport $ol$format$filter$IsLike from './ol/format/filter/IsLike.js';\nimport $ol$format$filter$IsNull from './ol/format/filter/IsNull.js';\nimport $ol$format$filter$LessThan from './ol/format/filter/LessThan.js';\nimport $ol$format$filter$LessThanOrEqualTo from './ol/format/filter/LessThanOrEqualTo.js';\nimport $ol$format$filter$Not from './ol/format/filter/Not.js';\nimport $ol$format$filter$NotEqualTo from './ol/format/filter/NotEqualTo.js';\nimport $ol$format$filter$Or from './ol/format/filter/Or.js';\nimport $ol$format$filter$Within from './ol/format/filter/Within.js';\nimport $ol$geom$Circle from './ol/geom/Circle.js';\nimport $ol$geom$Geometry from './ol/geom/Geometry.js';\nimport $ol$geom$GeometryCollection from './ol/geom/GeometryCollection.js';\nimport $ol$geom$LineString from './ol/geom/LineString.js';\nimport $ol$geom$LinearRing from './ol/geom/LinearRing.js';\nimport $ol$geom$MultiLineString from './ol/geom/MultiLineString.js';\nimport $ol$geom$MultiPoint from './ol/geom/MultiPoint.js';\nimport $ol$geom$MultiPolygon from './ol/geom/MultiPolygon.js';\nimport $ol$geom$Point from './ol/geom/Point.js';\nimport $ol$geom$Polygon from './ol/geom/Polygon.js';\nimport $ol$geom$SimpleGeometry from './ol/geom/SimpleGeometry.js';\nimport $ol$interaction$DoubleClickZoom from './ol/interaction/DoubleClickZoom.js';\nimport $ol$interaction$DragAndDrop from './ol/interaction/DragAndDrop.js';\nimport $ol$interaction$DragBox from './ol/interaction/DragBox.js';\nimport $ol$interaction$DragPan from './ol/interaction/DragPan.js';\nimport $ol$interaction$DragRotate from './ol/interaction/DragRotate.js';\nimport $ol$interaction$DragRotateAndZoom from './ol/interaction/DragRotateAndZoom.js';\nimport $ol$interaction$DragZoom from './ol/interaction/DragZoom.js';\nimport $ol$interaction$Draw from './ol/interaction/Draw.js';\nimport $ol$interaction$Extent from './ol/interaction/Extent.js';\nimport $ol$interaction$Interaction from './ol/interaction/Interaction.js';\nimport $ol$interaction$KeyboardPan from './ol/interaction/KeyboardPan.js';\nimport $ol$interaction$KeyboardZoom from './ol/interaction/KeyboardZoom.js';\nimport $ol$interaction$Modify from './ol/interaction/Modify.js';\nimport $ol$interaction$MouseWheelZoom from './ol/interaction/MouseWheelZoom.js';\nimport $ol$interaction$PinchRotate from './ol/interaction/PinchRotate.js';\nimport $ol$interaction$PinchZoom from './ol/interaction/PinchZoom.js';\nimport $ol$interaction$Pointer from './ol/interaction/Pointer.js';\nimport $ol$interaction$Select from './ol/interaction/Select.js';\nimport $ol$interaction$Snap from './ol/interaction/Snap.js';\nimport $ol$interaction$Translate from './ol/interaction/Translate.js';\nimport $ol$layer$Base from './ol/layer/Base.js';\nimport $ol$layer$Group from './ol/layer/Group.js';\nimport $ol$layer$Heatmap from './ol/layer/Heatmap.js';\nimport $ol$layer$Image from './ol/layer/Image.js';\nimport $ol$layer$Layer from './ol/layer/Layer.js';\nimport $ol$layer$Tile from './ol/layer/Tile.js';\nimport $ol$layer$Vector from './ol/layer/Vector.js';\nimport $ol$layer$VectorTile from './ol/layer/VectorTile.js';\nimport $ol$proj$Projection from './ol/proj/Projection.js';\nimport $ol$render$Feature from './ol/render/Feature.js';\nimport $ol$render$VectorContext from './ol/render/VectorContext.js';\nimport $ol$render$canvas$Immediate from './ol/render/canvas/Immediate.js';\nimport $ol$render$webgl$Immediate from './ol/render/webgl/Immediate.js';\nimport $ol$renderer$canvas$ImageLayer from './ol/renderer/canvas/ImageLayer.js';\nimport $ol$renderer$canvas$Map from './ol/renderer/canvas/Map.js';\nimport $ol$renderer$canvas$TileLayer from './ol/renderer/canvas/TileLayer.js';\nimport $ol$renderer$canvas$VectorLayer from './ol/renderer/canvas/VectorLayer.js';\nimport $ol$renderer$canvas$VectorTileLayer from './ol/renderer/canvas/VectorTileLayer.js';\nimport $ol$renderer$webgl$ImageLayer from './ol/renderer/webgl/ImageLayer.js';\nimport $ol$renderer$webgl$Map from './ol/renderer/webgl/Map.js';\nimport $ol$renderer$webgl$TileLayer from './ol/renderer/webgl/TileLayer.js';\nimport $ol$renderer$webgl$VectorLayer from './ol/renderer/webgl/VectorLayer.js';\nimport $ol$source$BingMaps from './ol/source/BingMaps.js';\nimport $ol$source$CartoDB from './ol/source/CartoDB.js';\nimport $ol$source$Cluster from './ol/source/Cluster.js';\nimport $ol$source$Image from './ol/source/Image.js';\nimport $ol$source$ImageArcGISRest from './ol/source/ImageArcGISRest.js';\nimport $ol$source$ImageCanvas from './ol/source/ImageCanvas.js';\nimport $ol$source$ImageMapGuide from './ol/source/ImageMapGuide.js';\nimport $ol$source$ImageStatic from './ol/source/ImageStatic.js';\nimport $ol$source$ImageWMS from './ol/source/ImageWMS.js';\nimport $ol$source$OSM from './ol/source/OSM.js';\nimport $ol$source$Raster from './ol/source/Raster.js';\nimport $ol$source$Source from './ol/source/Source.js';\nimport $ol$source$Stamen from './ol/source/Stamen.js';\nimport $ol$source$Tile from './ol/source/Tile.js';\nimport $ol$source$TileArcGISRest from './ol/source/TileArcGISRest.js';\nimport $ol$source$TileDebug from './ol/source/TileDebug.js';\nimport $ol$source$TileImage from './ol/source/TileImage.js';\nimport $ol$source$TileJSON from './ol/source/TileJSON.js';\nimport $ol$source$TileWMS from './ol/source/TileWMS.js';\nimport $ol$source$UTFGrid from './ol/source/UTFGrid.js';\nimport $ol$source$UrlTile from './ol/source/UrlTile.js';\nimport $ol$source$Vector from './ol/source/Vector.js';\nimport $ol$source$VectorTile from './ol/source/VectorTile.js';\nimport $ol$source$WMTS from './ol/source/WMTS.js';\nimport $ol$source$XYZ from './ol/source/XYZ.js';\nimport $ol$source$Zoomify from './ol/source/Zoomify.js';\nimport $ol$structs$LRUCache from './ol/structs/LRUCache.js';\nimport $ol$style$AtlasManager from './ol/style/AtlasManager.js';\nimport $ol$style$Circle from './ol/style/Circle.js';\nimport $ol$style$Fill from './ol/style/Fill.js';\nimport $ol$style$Icon from './ol/style/Icon.js';\nimport $ol$style$IconImageCache from './ol/style/IconImageCache.js';\nimport $ol$style$Image from './ol/style/Image.js';\nimport $ol$style$RegularShape from './ol/style/RegularShape.js';\nimport $ol$style$Stroke from './ol/style/Stroke.js';\nimport $ol$style$Style from './ol/style/Style.js';\nimport $ol$style$Text from './ol/style/Text.js';\nimport $ol$tilegrid$TileGrid from './ol/tilegrid/TileGrid.js';\nimport $ol$tilegrid$WMTS from './ol/tilegrid/WMTS.js';\nimport $ol$webgl$Context from './ol/webgl/Context.js';\nimport * as _ol from './ol/index.js';\nimport * as _ol_Observable from './ol/Observable.js';\nimport * as _ol_color from './ol/color.js';\nimport * as _ol_colorlike from './ol/colorlike.js';\nimport * as _ol_control from './ol/control.js';\nimport * as _ol_control_Attribution from './ol/control/Attribution.js';\nimport * as _ol_control_MousePosition from './ol/control/MousePosition.js';\nimport * as _ol_control_OverviewMap from './ol/control/OverviewMap.js';\nimport * as _ol_control_Rotate from './ol/control/Rotate.js';\nimport * as _ol_control_ScaleLine from './ol/control/ScaleLine.js';\nimport * as _ol_control_ZoomSlider from './ol/control/ZoomSlider.js';\nimport * as _ol_coordinate from './ol/coordinate.js';\nimport * as _ol_easing from './ol/easing.js';\nimport * as _ol_events_condition from './ol/events/condition.js';\nimport * as _ol_extent from './ol/extent.js';\nimport * as _ol_featureloader from './ol/featureloader.js';\nimport * as _ol_format_Polyline from './ol/format/Polyline.js';\nimport * as _ol_format_WFS from './ol/format/WFS.js';\nimport * as _ol_format_filter from './ol/format/filter.js';\nimport * as _ol_geom_Polygon from './ol/geom/Polygon.js';\nimport * as _ol_has from './ol/has.js';\nimport * as _ol_interaction from './ol/interaction.js';\nimport * as _ol_interaction_Draw from './ol/interaction/Draw.js';\nimport * as _ol_interaction_Pointer from './ol/interaction/Pointer.js';\nimport * as _ol_loadingstrategy from './ol/loadingstrategy.js';\nimport * as _ol_proj from './ol/proj.js';\nimport * as _ol_proj_Units from './ol/proj/Units.js';\nimport * as _ol_proj_proj4 from './ol/proj/proj4.js';\nimport * as _ol_render from './ol/render.js';\nimport * as _ol_render_canvas from './ol/render/canvas.js';\nimport * as _ol_size from './ol/size.js';\nimport * as _ol_source_OSM from './ol/source/OSM.js';\nimport * as _ol_source_WMTS from './ol/source/WMTS.js';\nimport * as _ol_sphere from './ol/sphere.js';\nimport * as _ol_style_IconImageCache from './ol/style/IconImageCache.js';\nimport * as _ol_tilegrid from './ol/tilegrid.js';\nimport * as _ol_tilegrid_WMTS from './ol/tilegrid/WMTS.js';\nimport * as _ol_xml from './ol/xml.js';\nimport * as ol_has from './ol/has.js';\nconst ol = window['ol'] = {};\nol.color = {};\nol.colorlike = {};\nol.control = {};\nol.coordinate = {};\nol.easing = {};\nol.events = {};\nol.events.condition = {};\nol.extent = {};\nol.featureloader = {};\nol.format = {};\nol.format.filter = {};\nol.geom = {};\nol.has = {};\nol.interaction = {};\nol.layer = {};\nol.loadingstrategy = {};\nol.proj = {};\nol.proj.Units = {};\nol.proj.proj4 = {};\nol.render = {};\nol.render.canvas = {};\nol.renderer = {};\nol.renderer.canvas = {};\nol.renderer.webgl = {};\nol.size = {};\nol.source = {};\nol.sphere = {};\nol.style = {};\nol.style.IconImageCache = {};\nol.tilegrid = {};\nol.xml = {};\nol.Collection = $ol$Collection;\nol.Feature = $ol$Feature;\nol.Geolocation = $ol$Geolocation;\nol.Graticule = $ol$Graticule;\nol.Kinetic = $ol$Kinetic;\nol.Map = $ol$Map;\nol.Object = $ol$Object;\nol.Observable = $ol$Observable;\nol.Observable.unByKey = _ol_Observable.unByKey;\nol.Overlay = $ol$Overlay;\nol.PluggableMap = $ol$PluggableMap;\nol.View = $ol$View;\nol.WebGLMap = $ol$WebGLMap;\nol.color.asArray = _ol_color.asArray;\nol.color.asString = _ol_color.asString;\nol.colorlike.asColorLike = _ol_colorlike.asColorLike;\nol.control.Attribution = $ol$control$Attribution;\nol.control.Attribution.render = _ol_control_Attribution.render;\nol.control.Control = $ol$control$Control;\nol.control.FullScreen = $ol$control$FullScreen;\nol.control.MousePosition = $ol$control$MousePosition;\nol.control.MousePosition.render = _ol_control_MousePosition.render;\nol.control.OverviewMap = $ol$control$OverviewMap;\nol.control.OverviewMap.render = _ol_control_OverviewMap.render;\nol.control.Rotate = $ol$control$Rotate;\nol.control.Rotate.render = _ol_control_Rotate.render;\nol.control.ScaleLine = $ol$control$ScaleLine;\nol.control.ScaleLine.render = _ol_control_ScaleLine.render;\nol.control.Zoom = $ol$control$Zoom;\nol.control.ZoomSlider = $ol$control$ZoomSlider;\nol.control.ZoomSlider.render = _ol_control_ZoomSlider.render;\nol.control.ZoomToExtent = $ol$control$ZoomToExtent;\nol.control.defaults = _ol_control.defaults;\nol.coordinate.add = _ol_coordinate.add;\nol.coordinate.createStringXY = _ol_coordinate.createStringXY;\nol.coordinate.format = _ol_coordinate.format;\nol.coordinate.rotate = _ol_coordinate.rotate;\nol.coordinate.toStringHDMS = _ol_coordinate.toStringHDMS;\nol.coordinate.toStringXY = _ol_coordinate.toStringXY;\nol.easing.easeIn = _ol_easing.easeIn;\nol.easing.easeOut = _ol_easing.easeOut;\nol.easing.inAndOut = _ol_easing.inAndOut;\nol.easing.linear = _ol_easing.linear;\nol.easing.upAndDown = _ol_easing.upAndDown;\nol.events.condition.altKeyOnly = _ol_events_condition.altKeyOnly;\nol.events.condition.altShiftKeysOnly = _ol_events_condition.altShiftKeysOnly;\nol.events.condition.always = _ol_events_condition.always;\nol.events.condition.click = _ol_events_condition.click;\nol.events.condition.doubleClick = _ol_events_condition.doubleClick;\nol.events.condition.focus = _ol_events_condition.focus;\nol.events.condition.mouseOnly = _ol_events_condition.mouseOnly;\nol.events.condition.never = _ol_events_condition.never;\nol.events.condition.noModifierKeys = _ol_events_condition.noModifierKeys;\nol.events.condition.platformModifierKeyOnly = _ol_events_condition.platformModifierKeyOnly;\nol.events.condition.pointerMove = _ol_events_condition.pointerMove;\nol.events.condition.primaryAction = _ol_events_condition.primaryAction;\nol.events.condition.shiftKeyOnly = _ol_events_condition.shiftKeyOnly;\nol.events.condition.singleClick = _ol_events_condition.singleClick;\nol.events.condition.targetNotEditable = _ol_events_condition.targetNotEditable;\nol.extent.applyTransform = _ol_extent.applyTransform;\nol.extent.boundingExtent = _ol_extent.boundingExtent;\nol.extent.buffer = _ol_extent.buffer;\nol.extent.containsCoordinate = _ol_extent.containsCoordinate;\nol.extent.containsExtent = _ol_extent.containsExtent;\nol.extent.containsXY = _ol_extent.containsXY;\nol.extent.createEmpty = _ol_extent.createEmpty;\nol.extent.equals = _ol_extent.equals;\nol.extent.extend = _ol_extent.extend;\nol.extent.getArea = _ol_extent.getArea;\nol.extent.getBottomLeft = _ol_extent.getBottomLeft;\nol.extent.getBottomRight = _ol_extent.getBottomRight;\nol.extent.getCenter = _ol_extent.getCenter;\nol.extent.getHeight = _ol_extent.getHeight;\nol.extent.getIntersection = _ol_extent.getIntersection;\nol.extent.getSize = _ol_extent.getSize;\nol.extent.getTopLeft = _ol_extent.getTopLeft;\nol.extent.getTopRight = _ol_extent.getTopRight;\nol.extent.getWidth = _ol_extent.getWidth;\nol.extent.intersects = _ol_extent.intersects;\nol.extent.isEmpty = _ol_extent.isEmpty;\nol.featureloader.xhr = _ol_featureloader.xhr;\nol.format.EsriJSON = $ol$format$EsriJSON;\nol.format.Feature = $ol$format$Feature;\nol.format.GML = $ol$format$GML;\nol.format.GML2 = $ol$format$GML2;\nol.format.GML3 = $ol$format$GML3;\nol.format.GPX = $ol$format$GPX;\nol.format.GeoJSON = $ol$format$GeoJSON;\nol.format.IGC = $ol$format$IGC;\nol.format.KML = $ol$format$KML;\nol.format.MVT = $ol$format$MVT;\nol.format.OSMXML = $ol$format$OSMXML;\nol.format.Polyline = $ol$format$Polyline;\nol.format.Polyline.decodeDeltas = _ol_format_Polyline.decodeDeltas;\nol.format.Polyline.decodeFloats = _ol_format_Polyline.decodeFloats;\nol.format.Polyline.encodeDeltas = _ol_format_Polyline.encodeDeltas;\nol.format.Polyline.encodeFloats = _ol_format_Polyline.encodeFloats;\nol.format.TopoJSON = $ol$format$TopoJSON;\nol.format.WFS = $ol$format$WFS;\nol.format.WFS.writeFilter = _ol_format_WFS.writeFilter;\nol.format.WKT = $ol$format$WKT;\nol.format.WMSCapabilities = $ol$format$WMSCapabilities;\nol.format.WMSGetFeatureInfo = $ol$format$WMSGetFeatureInfo;\nol.format.WMTSCapabilities = $ol$format$WMTSCapabilities;\nol.format.filter.Bbox = $ol$format$filter$Bbox;\nol.format.filter.Contains = $ol$format$filter$Contains;\nol.format.filter.During = $ol$format$filter$During;\nol.format.filter.EqualTo = $ol$format$filter$EqualTo;\nol.format.filter.GreaterThan = $ol$format$filter$GreaterThan;\nol.format.filter.GreaterThanOrEqualTo = $ol$format$filter$GreaterThanOrEqualTo;\nol.format.filter.Intersects = $ol$format$filter$Intersects;\nol.format.filter.IsBetween = $ol$format$filter$IsBetween;\nol.format.filter.IsLike = $ol$format$filter$IsLike;\nol.format.filter.IsNull = $ol$format$filter$IsNull;\nol.format.filter.LessThan = $ol$format$filter$LessThan;\nol.format.filter.LessThanOrEqualTo = $ol$format$filter$LessThanOrEqualTo;\nol.format.filter.Not = $ol$format$filter$Not;\nol.format.filter.NotEqualTo = $ol$format$filter$NotEqualTo;\nol.format.filter.Or = $ol$format$filter$Or;\nol.format.filter.Within = $ol$format$filter$Within;\nol.format.filter.and = _ol_format_filter.and;\nol.format.filter.bbox = _ol_format_filter.bbox;\nol.format.filter.between = _ol_format_filter.between;\nol.format.filter.contains = _ol_format_filter.contains;\nol.format.filter.during = _ol_format_filter.during;\nol.format.filter.equalTo = _ol_format_filter.equalTo;\nol.format.filter.greaterThan = _ol_format_filter.greaterThan;\nol.format.filter.greaterThanOrEqualTo = _ol_format_filter.greaterThanOrEqualTo;\nol.format.filter.intersects = _ol_format_filter.intersects;\nol.format.filter.isNull = _ol_format_filter.isNull;\nol.format.filter.lessThan = _ol_format_filter.lessThan;\nol.format.filter.lessThanOrEqualTo = _ol_format_filter.lessThanOrEqualTo;\nol.format.filter.like = _ol_format_filter.like;\nol.format.filter.not = _ol_format_filter.not;\nol.format.filter.notEqualTo = _ol_format_filter.notEqualTo;\nol.format.filter.or = _ol_format_filter.or;\nol.format.filter.within = _ol_format_filter.within;\nol.geom.Circle = $ol$geom$Circle;\nol.geom.Geometry = $ol$geom$Geometry;\nol.geom.GeometryCollection = $ol$geom$GeometryCollection;\nol.geom.LineString = $ol$geom$LineString;\nol.geom.LinearRing = $ol$geom$LinearRing;\nol.geom.MultiLineString = $ol$geom$MultiLineString;\nol.geom.MultiPoint = $ol$geom$MultiPoint;\nol.geom.MultiPolygon = $ol$geom$MultiPolygon;\nol.geom.Point = $ol$geom$Point;\nol.geom.Polygon = $ol$geom$Polygon;\nol.geom.Polygon.circular = _ol_geom_Polygon.circular;\nol.geom.Polygon.fromCircle = _ol_geom_Polygon.fromCircle;\nol.geom.Polygon.fromExtent = _ol_geom_Polygon.fromExtent;\nol.geom.SimpleGeometry = $ol$geom$SimpleGeometry;\nol.has.DEVICE_PIXEL_RATIO = _ol_has.DEVICE_PIXEL_RATIO;\nol.has.GEOLOCATION = _ol_has.GEOLOCATION;\nol.has.TOUCH = _ol_has.TOUCH;\nol.has.WEBGL = _ol_has.WEBGL;\nol.inherits = _ol.inherits;\nol.interaction.DoubleClickZoom = $ol$interaction$DoubleClickZoom;\nol.interaction.DragAndDrop = $ol$interaction$DragAndDrop;\nol.interaction.DragBox = $ol$interaction$DragBox;\nol.interaction.DragPan = $ol$interaction$DragPan;\nol.interaction.DragRotate = $ol$interaction$DragRotate;\nol.interaction.DragRotateAndZoom = $ol$interaction$DragRotateAndZoom;\nol.interaction.DragZoom = $ol$interaction$DragZoom;\nol.interaction.Draw = $ol$interaction$Draw;\nol.interaction.Draw.createBox = _ol_interaction_Draw.createBox;\nol.interaction.Draw.createRegularPolygon = _ol_interaction_Draw.createRegularPolygon;\nol.interaction.Draw.handleEvent = _ol_interaction_Draw.handleEvent;\nol.interaction.Extent = $ol$interaction$Extent;\nol.interaction.Interaction = $ol$interaction$Interaction;\nol.interaction.KeyboardPan = $ol$interaction$KeyboardPan;\nol.interaction.KeyboardZoom = $ol$interaction$KeyboardZoom;\nol.interaction.Modify = $ol$interaction$Modify;\nol.interaction.MouseWheelZoom = $ol$interaction$MouseWheelZoom;\nol.interaction.PinchRotate = $ol$interaction$PinchRotate;\nol.interaction.PinchZoom = $ol$interaction$PinchZoom;\nol.interaction.Pointer = $ol$interaction$Pointer;\nol.interaction.Pointer.handleEvent = _ol_interaction_Pointer.handleEvent;\nol.interaction.Select = $ol$interaction$Select;\nol.interaction.Snap = $ol$interaction$Snap;\nol.interaction.Translate = $ol$interaction$Translate;\nol.interaction.defaults = _ol_interaction.defaults;\nol.layer.Base = $ol$layer$Base;\nol.layer.Group = $ol$layer$Group;\nol.layer.Heatmap = $ol$layer$Heatmap;\nol.layer.Image = $ol$layer$Image;\nol.layer.Layer = $ol$layer$Layer;\nol.layer.Tile = $ol$layer$Tile;\nol.layer.Vector = $ol$layer$Vector;\nol.layer.VectorTile = $ol$layer$VectorTile;\nol.loadingstrategy.all = _ol_loadingstrategy.all;\nol.loadingstrategy.bbox = _ol_loadingstrategy.bbox;\nol.loadingstrategy.tile = _ol_loadingstrategy.tile;\nol.proj.Projection = $ol$proj$Projection;\nol.proj.Units.METERS_PER_UNIT = _ol_proj_Units.METERS_PER_UNIT;\nol.proj.addCoordinateTransforms = _ol_proj.addCoordinateTransforms;\nol.proj.addEquivalentProjections = _ol_proj.addEquivalentProjections;\nol.proj.addProjection = _ol_proj.addProjection;\nol.proj.equivalent = _ol_proj.equivalent;\nol.proj.fromLonLat = _ol_proj.fromLonLat;\nol.proj.get = _ol_proj.get;\nol.proj.getPointResolution = _ol_proj.getPointResolution;\nol.proj.getTransform = _ol_proj.getTransform;\nol.proj.proj4.register = _ol_proj_proj4.register;\nol.proj.toLonLat = _ol_proj.toLonLat;\nol.proj.transform = _ol_proj.transform;\nol.proj.transformExtent = _ol_proj.transformExtent;\nol.render.VectorContext = $ol$render$VectorContext;\nol.render.canvas.labelCache = _ol_render_canvas.labelCache;\nol.render.toContext = _ol_render.toContext;\nol.renderer.canvas.ImageLayer = $ol$renderer$canvas$ImageLayer;\nol.renderer.canvas.Map = $ol$renderer$canvas$Map;\nol.renderer.canvas.TileLayer = $ol$renderer$canvas$TileLayer;\nol.renderer.canvas.VectorLayer = $ol$renderer$canvas$VectorLayer;\nol.renderer.canvas.VectorTileLayer = $ol$renderer$canvas$VectorTileLayer;\nol.renderer.webgl.ImageLayer = $ol$renderer$webgl$ImageLayer;\nol.renderer.webgl.Map = $ol$renderer$webgl$Map;\nol.renderer.webgl.TileLayer = $ol$renderer$webgl$TileLayer;\nol.renderer.webgl.VectorLayer = $ol$renderer$webgl$VectorLayer;\nol.size.toSize = _ol_size.toSize;\nol.source.BingMaps = $ol$source$BingMaps;\nol.source.CartoDB = $ol$source$CartoDB;\nol.source.Cluster = $ol$source$Cluster;\nol.source.Image = $ol$source$Image;\nol.source.ImageArcGISRest = $ol$source$ImageArcGISRest;\nol.source.ImageCanvas = $ol$source$ImageCanvas;\nol.source.ImageMapGuide = $ol$source$ImageMapGuide;\nol.source.ImageStatic = $ol$source$ImageStatic;\nol.source.ImageWMS = $ol$source$ImageWMS;\nol.source.OSM = $ol$source$OSM;\nol.source.OSM.ATTRIBUTION = _ol_source_OSM.ATTRIBUTION;\nol.source.Raster = $ol$source$Raster;\nol.source.Source = $ol$source$Source;\nol.source.Stamen = $ol$source$Stamen;\nol.source.Tile = $ol$source$Tile;\nol.source.TileArcGISRest = $ol$source$TileArcGISRest;\nol.source.TileDebug = $ol$source$TileDebug;\nol.source.TileImage = $ol$source$TileImage;\nol.source.TileJSON = $ol$source$TileJSON;\nol.source.TileWMS = $ol$source$TileWMS;\nol.source.UTFGrid = $ol$source$UTFGrid;\nol.source.Vector = $ol$source$Vector;\nol.source.VectorTile = $ol$source$VectorTile;\nol.source.WMTS = $ol$source$WMTS;\nol.source.WMTS.optionsFromCapabilities = _ol_source_WMTS.optionsFromCapabilities;\nol.source.XYZ = $ol$source$XYZ;\nol.source.Zoomify = $ol$source$Zoomify;\nol.sphere.getArea = _ol_sphere.getArea;\nol.sphere.getDistance = _ol_sphere.getDistance;\nol.sphere.getLength = _ol_sphere.getLength;\nol.style.AtlasManager = $ol$style$AtlasManager;\nol.style.Circle = $ol$style$Circle;\nol.style.Fill = $ol$style$Fill;\nol.style.Icon = $ol$style$Icon;\nol.style.IconImageCache.shared = _ol_style_IconImageCache.shared;\nol.style.Image = $ol$style$Image;\nol.style.RegularShape = $ol$style$RegularShape;\nol.style.Stroke = $ol$style$Stroke;\nol.style.Style = $ol$style$Style;\nol.style.Text = $ol$style$Text;\nol.tilegrid.TileGrid = $ol$tilegrid$TileGrid;\nol.tilegrid.WMTS = $ol$tilegrid$WMTS;\nol.tilegrid.WMTS.createFromCapabilitiesMatrixSet = _ol_tilegrid_WMTS.createFromCapabilitiesMatrixSet;\nol.tilegrid.createXYZ = _ol_tilegrid.createXYZ;\nol.xml.getAllTextContent = _ol_xml.getAllTextContent;\nol.xml.parse = _ol_xml.parse;\n","/**\n * @module ol/proj/proj4\n */\nimport {addCoordinateTransforms, addProjection, addEquivalentProjections, get} from '../proj.js';\nimport {get as getTransform} from './transforms.js';\nimport Projection from './Projection.js';\n\n/**\n * Make projections defined in proj4 (with `proj4.defs()`) available in\n * OpenLayers.\n *\n * This function should be called whenever changes are made to the proj4\n * registry, e.g. after calling `proj4.defs()`. Existing transforms will not be\n * modified by this function.\n *\n * @param {?} proj4 Proj4.\n * @api\n */\nexport function register(proj4) {\n const projCodes = Object.keys(proj4.defs);\n const len = projCodes.length;\n let i, j;\n for (i = 0; i < len; ++i) {\n const code = projCodes[i];\n if (!get(code)) {\n const def = proj4.defs(code);\n addProjection(new Projection({\n code: code,\n axisOrientation: def.axis,\n metersPerUnit: def.to_meter,\n units: def.units\n }));\n }\n }\n for (i = 0; i < len; ++i) {\n const code1 = projCodes[i];\n const proj1 = get(code1);\n for (j = 0; j < len; ++j) {\n const code2 = projCodes[j];\n const proj2 = get(code2);\n if (!getTransform(code1, code2)) {\n if (proj4.defs[code1] === proj4.defs[code2]) {\n addEquivalentProjections([proj1, proj2]);\n } else {\n const transform = proj4(code1, code2);\n addCoordinateTransforms(proj1, proj2, transform.forward, transform.inverse);\n }\n }\n }\n }\n}\n","/**\n * @module ol/render\n */\nimport {DEVICE_PIXEL_RATIO} from './has.js';\nimport {create as createTransform, scale as scaleTransform} from './transform.js';\nimport CanvasImmediateRenderer from './render/canvas/Immediate.js';\n\n\n/**\n * @typedef {Object} State\n * @property {CanvasRenderingContext2D} context Canvas context that the layer is being rendered to.\n * @property {module:ol/Feature|module:ol/render/Feature} feature\n * @property {module:ol/geom/SimpleGeometry} geometry\n * @property {number} pixelRatio Pixel ratio used by the layer renderer.\n * @property {number} resolution Resolution that the render batch was created and optimized for.\n * This is not the view's resolution that is being rendered.\n * @property {number} rotation Rotation of the rendered layer in radians.\n */\n\n\n/**\n * A function to be used when sorting features before rendering.\n * It takes two instances of {@link module:ol/Feature} or\n * {@link module:ol/render/Feature} and returns a `{number}`.\n *\n * @typedef {function((module:ol/Feature|module:ol/render/Feature),\n * (module:ol/Feature|module:ol/render/Feature)):number} OrderFunction\n */\n\n\n/**\n * @typedef {Object} ToContextOptions\n * @property {module:ol/size~Size} [size] Desired size of the canvas in css\n * pixels. When provided, both canvas and css size will be set according to the\n * `pixelRatio`. If not provided, the current canvas and css sizes will not be\n * altered.\n * @property {number} [pixelRatio=window.devicePixelRatio] Pixel ratio (canvas\n * pixel to css pixel ratio) for the canvas.\n */\n\n\n/**\n * Binds a Canvas Immediate API to a canvas context, to allow drawing geometries\n * to the context's canvas.\n *\n * The units for geometry coordinates are css pixels relative to the top left\n * corner of the canvas element.\n * ```js\n * import {toContext} from 'ol/render';\n * import Fill from 'ol/style/Fill';\n * import Polygon from 'ol/geom/Polygon';\n *\n * var canvas = document.createElement('canvas');\n * var render = toContext(canvas.getContext('2d'),\n * { size: [100, 100] });\n * render.setFillStrokeStyle(new Fill({ color: blue }));\n * render.drawPolygon(\n * new Polygon([[[0, 0], [100, 100], [100, 0], [0, 0]]]));\n * ```\n *\n * @param {CanvasRenderingContext2D} context Canvas context.\n * @param {module:ol/render~ToContextOptions=} opt_options Options.\n * 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