/*global define*/
define([
'../Core/Cartesian2',
'../Core/Cartesian3',
'../Core/Cartographic',
'../Core/combine',
'../Core/Credit',
'../Core/defaultValue',
'../Core/defined',
'../Core/defineProperties',
'../Core/DeveloperError',
'../Core/Event',
'../Core/freezeObject',
'../Core/GeographicTilingScheme',
'../Core/isArray',
'../Core/loadJson',
'../Core/loadText',
'../Core/loadWithXhr',
'../Core/loadXML',
'../Core/Math',
'../Core/Rectangle',
'../Core/TileProviderError',
'../Core/WebMercatorTilingScheme',
'../ThirdParty/when',
'./ImageryProvider'
], function(
Cartesian2,
Cartesian3,
Cartographic,
combine,
Credit,
defaultValue,
defined,
defineProperties,
DeveloperError,
Event,
freezeObject,
GeographicTilingScheme,
isArray,
loadJson,
loadText,
loadWithXhr,
loadXML,
CesiumMath,
Rectangle,
TileProviderError,
WebMercatorTilingScheme,
when,
ImageryProvider) {
'use strict';
/**
* Provides imagery by requesting tiles using a specified URL template.
*
* @alias UrlTemplateImageryProvider
* @constructor
*
* @param {Promise.<Object>|Object} [options] Object with the following properties:
* @param {String} options.url The URL template to use to request tiles. It has the following keywords:
* <ul>
* <li><code>{z}</code>: The level of the tile in the tiling scheme. Level zero is the root of the quadtree pyramid.</li>
* <li><code>{x}</code>: The tile X coordinate in the tiling scheme, where 0 is the Westernmost tile.</li>
* <li><code>{y}</code>: The tile Y coordinate in the tiling scheme, where 0 is the Northernmost tile.</li>
* <li><code>{s}</code>: One of the available subdomains, used to overcome browser limits on the number of simultaneous requests per host.</li>
* <li><code>{reverseX}</code>: The tile X coordinate in the tiling scheme, where 0 is the Easternmost tile.</li>
* <li><code>{reverseY}</code>: The tile Y coordinate in the tiling scheme, where 0 is the Southernmost tile.</li>
* <li><code>{reverseZ}</code>: The level of the tile in the tiling scheme, where level zero is the maximum level of the quadtree pyramid. In order to use reverseZ, maximumLevel must be defined.</li>
* <li><code>{westDegrees}</code>: The Western edge of the tile in geodetic degrees.</li>
* <li><code>{southDegrees}</code>: The Southern edge of the tile in geodetic degrees.</li>
* <li><code>{eastDegrees}</code>: The Eastern edge of the tile in geodetic degrees.</li>
* <li><code>{northDegrees}</code>: The Northern edge of the tile in geodetic degrees.</li>
* <li><code>{westProjected}</code>: The Western edge of the tile in projected coordinates of the tiling scheme.</li>
* <li><code>{southProjected}</code>: The Southern edge of the tile in projected coordinates of the tiling scheme.</li>
* <li><code>{eastProjected}</code>: The Eastern edge of the tile in projected coordinates of the tiling scheme.</li>
* <li><code>{northProjected}</code>: The Northern edge of the tile in projected coordinates of the tiling scheme.</li>
* <li><code>{width}</code>: The width of each tile in pixels.</li>
* <li><code>{height}</code>: The height of each tile in pixels.</li>
* </ul>
* @param {String} [options.pickFeaturesUrl] The URL template to use to pick features. If this property is not specified,
* {@link UrlTemplateImageryProvider#pickFeatures} will immediately returned undefined, indicating no
* features picked. The URL template supports all of the keywords supported by the <code>url</code>
* parameter, plus the following:
* <ul>
* <li><code>{i}</code>: The pixel column (horizontal coordinate) of the picked position, where the Westernmost pixel is 0.</li>
* <li><code>{j}</code>: The pixel row (vertical coordinate) of the picked position, where the Northernmost pixel is 0.</li>
* <li><code>{reverseI}</code>: The pixel column (horizontal coordinate) of the picked position, where the Easternmost pixel is 0.</li>
* <li><code>{reverseJ}</code>: The pixel row (vertical coordinate) of the picked position, where the Southernmost pixel is 0.</li>
* <li><code>{longitudeDegrees}</code>: The longitude of the picked position in degrees.</li>
* <li><code>{latitudeDegrees}</code>: The latitude of the picked position in degrees.</li>
* <li><code>{longitudeProjected}</code>: The longitude of the picked position in the projected coordinates of the tiling scheme.</li>
* <li><code>{latitudeProjected}</code>: The latitude of the picked position in the projected coordinates of the tiling scheme.</li>
* <li><code>{format}</code>: The format in which to get feature information, as specified in the {@link GetFeatureInfoFormat}.</li>
* </ul>
* @param {Object} [options.urlSchemeZeroPadding] Gets the URL scheme zero padding for each tile coordinate. The format is '000' where
* each coordinate will be padded on the left with zeros to match the width of the passed string of zeros. e.g. Setting:
* urlSchemeZeroPadding : { '{x}' : '0000'}
* will cause an 'x' value of 12 to return the string '0012' for {x} in the generated URL.
* It the passed object has the following keywords:
* <ul>
* <li> <code>{z}</code>: The zero padding for the level of the tile in the tiling scheme.</li>
* <li> <code>{x}</code>: The zero padding for the tile X coordinate in the tiling scheme.</li>
* <li> <code>{y}</code>: The zero padding for the the tile Y coordinate in the tiling scheme.</li>
* <li> <code>{reverseX}</code>: The zero padding for the tile reverseX coordinate in the tiling scheme.</li>
* <li> <code>{reverseY}</code>: The zero padding for the tile reverseY coordinate in the tiling scheme.</li>
* <li> <code>{reverseZ}</code>: The zero padding for the reverseZ coordinate of the tile in the tiling scheme.</li>
* </ul>
* @param {String|String[]} [options.subdomains='abc'] The subdomains to use for the <code>{s}</code> placeholder in the URL template.
* If this parameter is a single string, each character in the string is a subdomain. If it is
* an array, each element in the array is a subdomain.
* @param {Object} [options.proxy] A proxy to use for requests. This object is expected to have a getURL function which returns the proxied URL.
* @param {Credit|String} [options.credit=''] A credit for the data source, which is displayed on the canvas.
* @param {Number} [options.minimumLevel=0] The minimum level-of-detail supported by the imagery provider. Take care when specifying
* this that the number of tiles at the minimum level is small, such as four or less. A larger number is likely
* to result in rendering problems.
* @param {Number} [options.maximumLevel] The maximum level-of-detail supported by the imagery provider, or undefined if there is no limit.
* @param {Rectangle} [options.rectangle=Rectangle.MAX_VALUE] The rectangle, in radians, covered by the image.
* @param {TilingScheme} [options.tilingScheme=WebMercatorTilingScheme] The tiling scheme specifying how the ellipsoidal
* surface is broken into tiles. If this parameter is not provided, a {@link WebMercatorTilingScheme}
* is used.
* @param {Ellipsoid} [options.ellipsoid] The ellipsoid. If the tilingScheme is specified,
* this parameter is ignored and the tiling scheme's ellipsoid is used instead. If neither
* parameter is specified, the WGS84 ellipsoid is used.
* @param {Number} [options.tileWidth=256] Pixel width of image tiles.
* @param {Number} [options.tileHeight=256] Pixel height of image tiles.
* @param {Boolean} [options.hasAlphaChannel=true] true if the images provided by this imagery provider
* include an alpha channel; otherwise, false. If this property is false, an alpha channel, if
* present, will be ignored. If this property is true, any images without an alpha channel will
* be treated as if their alpha is 1.0 everywhere. When this property is false, memory usage
* and texture upload time are potentially reduced.
* @param {GetFeatureInfoFormat[]} [options.getFeatureInfoFormats] The formats in which to get feature information at a
* specific location when {@link UrlTemplateImageryProvider#pickFeatures} is invoked. If this
* parameter is not specified, feature picking is disabled.
* @param {Boolean} [options.enablePickFeatures=true] If true, {@link UrlTemplateImageryProvider#pickFeatures} will
* request the <code>options.pickFeaturesUrl</code> and attempt to interpret the features included in the response. If false,
* {@link UrlTemplateImageryProvider#pickFeatures} will immediately return undefined (indicating no pickable
* features) without communicating with the server. Set this property to false if you know your data
* source does not support picking features or if you don't want this provider's features to be pickable. Note
* that this can be dynamically overridden by modifying the {@link UriTemplateImageryProvider#enablePickFeatures}
* property.
*
*
* @example
* // Access Natural Earth II imagery, which uses a TMS tiling scheme and Geographic (EPSG:4326) project
* var tms = new Cesium.UrlTemplateImageryProvider({
* url : 'https://cesiumjs.org/tilesets/imagery/naturalearthii/{z}/{x}/{reverseY}.jpg',
* credit : '© Analytical Graphics, Inc.',
* tilingScheme : new Cesium.GeographicTilingScheme(),
* maximumLevel : 5
* });
* // Access the CartoDB Positron basemap, which uses an OpenStreetMap-like tiling scheme.
* var positron = new Cesium.UrlTemplateImageryProvider({
* url : 'http://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}.png',
* credit : 'Map tiles by CartoDB, under CC BY 3.0. Data by OpenStreetMap, under ODbL.'
* });
* // Access a Web Map Service (WMS) server.
* var wms = new Cesium.UrlTemplateImageryProvider({
* url : 'https://programs.communications.gov.au/geoserver/ows?tiled=true&' +
* 'transparent=true&format=image%2Fpng&exceptions=application%2Fvnd.ogc.se_xml&' +
* 'styles=&service=WMS&version=1.1.1&request=GetMap&' +
* 'layers=public%3AMyBroadband_Availability&srs=EPSG%3A3857&' +
* 'bbox={westProjected}%2C{southProjected}%2C{eastProjected}%2C{northProjected}&' +
* 'width=256&height=256',
* rectangle : Cesium.Rectangle.fromDegrees(96.799393, -43.598214999057824, 153.63925700000001, -9.2159219997013)
* });
*
* @see ArcGisMapServerImageryProvider
* @see BingMapsImageryProvider
* @see GoogleEarthImageryProvider
* @see createOpenStreetMapImageryProvider
* @see SingleTileImageryProvider
* @see createTileMapServiceImageryProvider
* @see WebMapServiceImageryProvider
* @see WebMapTileServiceImageryProvider
*/
function UrlTemplateImageryProvider(options) {
//>>includeStart('debug', pragmas.debug);
if (!defined(options)) {
throw new DeveloperError('options is required.');
}
if (!when.isPromise(options) && !defined(options.url)) {
throw new DeveloperError('options is required.');
}
//>>includeEnd('debug');
this._errorEvent = new Event();
this._url = undefined;
this._urlSchemeZeroPadding = undefined;
this._pickFeaturesUrl = undefined;
this._proxy = undefined;
this._tileWidth = undefined;
this._tileHeight = undefined;
this._maximumLevel = undefined;
this._minimumLevel = undefined;
this._tilingScheme = undefined;
this._rectangle = undefined;
this._tileDiscardPolicy = undefined;
this._credit = undefined;
this._hasAlphaChannel = undefined;
this._readyPromise = undefined;
/**
* Gets or sets a value indicating whether feature picking is enabled. If true, {@link UrlTemplateImageryProvider#pickFeatures} will
* request the <code>options.pickFeaturesUrl</code> and attempt to interpret the features included in the response. If false,
* {@link UrlTemplateImageryProvider#pickFeatures} will immediately return undefined (indicating no pickable
* features) without communicating with the server. Set this property to false if you know your data
* source does not support picking features or if you don't want this provider's features to be pickable.
* @type {Boolean}
* @default true
*/
this.enablePickFeatures = true;
this.reinitialize(options);
}
defineProperties(UrlTemplateImageryProvider.prototype, {
/**
* Gets the URL template to use to request tiles. It has the following keywords:
* <ul>
* <li> <code>{z}</code>: The level of the tile in the tiling scheme. Level zero is the root of the quadtree pyramid.</li>
* <li> <code>{x}</code>: The tile X coordinate in the tiling scheme, where 0 is the Westernmost tile.</li>
* <li> <code>{y}</code>: The tile Y coordinate in the tiling scheme, where 0 is the Northernmost tile.</li>
* <li> <code>{s}</code>: One of the available subdomains, used to overcome browser limits on the number of simultaneous requests per host.</li>
* <li> <code>{reverseX}</code>: The tile X coordinate in the tiling scheme, where 0 is the Easternmost tile.</li>
* <li> <code>{reverseY}</code>: The tile Y coordinate in the tiling scheme, where 0 is the Southernmost tile.</li>
* <li> <code>{reverseZ}</code>: The level of the tile in the tiling scheme, where level zero is the maximum level of the quadtree pyramid. In order to use reverseZ, maximumLevel must be defined.</li>
* <li> <code>{westDegrees}</code>: The Western edge of the tile in geodetic degrees.</li>
* <li> <code>{southDegrees}</code>: The Southern edge of the tile in geodetic degrees.</li>
* <li> <code>{eastDegrees}</code>: The Eastern edge of the tile in geodetic degrees.</li>
* <li> <code>{northDegrees}</code>: The Northern edge of the tile in geodetic degrees.</li>
* <li> <code>{westProjected}</code>: The Western edge of the tile in projected coordinates of the tiling scheme.</li>
* <li> <code>{southProjected}</code>: The Southern edge of the tile in projected coordinates of the tiling scheme.</li>
* <li> <code>{eastProjected}</code>: The Eastern edge of the tile in projected coordinates of the tiling scheme.</li>
* <li> <code>{northProjected}</code>: The Northern edge of the tile in projected coordinates of the tiling scheme.</li>
* <li> <code>{width}</code>: The width of each tile in pixels.</li>
* <li> <code>{height}</code>: The height of each tile in pixels.</li>
* </ul>
* @memberof UrlTemplateImageryProvider.prototype
* @type {String}
* @readonly
*/
url : {
get : function() {
return this._url;
}
},
/**
* Gets the URL scheme zero padding for each tile coordinate. The format is '000' where each coordinate will be padded on
* the left with zeros to match the width of the passed string of zeros. e.g. Setting:
* urlSchemeZeroPadding : { '{x}' : '0000'}
* will cause an 'x' value of 12 to return the string '0012' for {x} in the generated URL.
* It has the following keywords:
* <ul>
* <li> <code>{z}</code>: The zero padding for the level of the tile in the tiling scheme.</li>
* <li> <code>{x}</code>: The zero padding for the tile X coordinate in the tiling scheme.</li>
* <li> <code>{y}</code>: The zero padding for the the tile Y coordinate in the tiling scheme.</li>
* <li> <code>{reverseX}</code>: The zero padding for the tile reverseX coordinate in the tiling scheme.</li>
* <li> <code>{reverseY}</code>: The zero padding for the tile reverseY coordinate in the tiling scheme.</li>
* <li> <code>{reverseZ}</code>: The zero padding for the reverseZ coordinate of the tile in the tiling scheme.</li>
* </ul>
* @memberof UrlTemplateImageryProvider.prototype
* @type {Object}
* @readonly
*/
urlSchemeZeroPadding : {
get : function() {
return this._urlSchemeZeroPadding;
}
},
/**
* Gets the URL template to use to use to pick features. If this property is not specified,
* {@link UrlTemplateImageryProvider#pickFeatures} will immediately returned undefined, indicating no
* features picked. The URL template supports all of the keywords supported by the
* {@link UrlTemplateImageryProvider#url} property, plus the following:
* <ul>
* <li><code>{i}</code>: The pixel column (horizontal coordinate) of the picked position, where the Westernmost pixel is 0.</li>
* <li><code>{j}</code>: The pixel row (vertical coordinate) of the picked position, where the Northernmost pixel is 0.</li>
* <li><code>{reverseI}</code>: The pixel column (horizontal coordinate) of the picked position, where the Easternmost pixel is 0.</li>
* <li><code>{reverseJ}</code>: The pixel row (vertical coordinate) of the picked position, where the Southernmost pixel is 0.</li>
* <li><code>{longitudeDegrees}</code>: The longitude of the picked position in degrees.</li>
* <li><code>{latitudeDegrees}</code>: The latitude of the picked position in degrees.</li>
* <li><code>{longitudeProjected}</code>: The longitude of the picked position in the projected coordinates of the tiling scheme.</li>
* <li><code>{latitudeProjected}</code>: The latitude of the picked position in the projected coordinates of the tiling scheme.</li>
* <li><code>{format}</code>: The format in which to get feature information, as specified in the {@link GetFeatureInfoFormat}.</li>
* </ul>
* @type {String}
* @readonly
*/
pickFeaturesUrl : {
get : function() {
return this._pickFeaturesUrl;
}
},
/**
* Gets the proxy used by this provider.
* @memberof UrlTemplateImageryProvider.prototype
* @type {Proxy}
* @readonly
* @default undefined
*/
proxy : {
get : function() {
return this._proxy;
}
},
/**
* Gets the width of each tile, in pixels. This function should
* not be called before {@link UrlTemplateImageryProvider#ready} returns true.
* @memberof UrlTemplateImageryProvider.prototype
* @type {Number}
* @readonly
* @default 256
*/
tileWidth : {
get : function() {
//>>includeStart('debug', pragmas.debug);
if (!this.ready) {
throw new DeveloperError('tileWidth must not be called before the imagery provider is ready.');
}
//>>includeEnd('debug');
return this._tileWidth;
}
},
/**
* Gets the height of each tile, in pixels. This function should
* not be called before {@link UrlTemplateImageryProvider#ready} returns true.
* @memberof UrlTemplateImageryProvider.prototype
* @type {Number}
* @readonly
* @default 256
*/
tileHeight: {
get : function() {
//>>includeStart('debug', pragmas.debug);
if (!this.ready) {
throw new DeveloperError('tileHeight must not be called before the imagery provider is ready.');
}
//>>includeEnd('debug');
return this._tileHeight;
}
},
/**
* Gets the maximum level-of-detail that can be requested, or undefined if there is no limit.
* This function should not be called before {@link UrlTemplateImageryProvider#ready} returns true.
* @memberof UrlTemplateImageryProvider.prototype
* @type {Number}
* @readonly
* @default undefined
*/
maximumLevel : {
get : function() {
//>>includeStart('debug', pragmas.debug);
if (!this.ready) {
throw new DeveloperError('maximumLevel must not be called before the imagery provider is ready.');
}
//>>includeEnd('debug');
return this._maximumLevel;
}
},
/**
* Gets the minimum level-of-detail that can be requested. This function should
* not be called before {@link UrlTemplateImageryProvider#ready} returns true.
* @memberof UrlTemplateImageryProvider.prototype
* @type {Number}
* @readonly
* @default 0
*/
minimumLevel : {
get : function() {
//>>includeStart('debug', pragmas.debug);
if (!this.ready) {
throw new DeveloperError('minimumLevel must not be called before the imagery provider is ready.');
}
//>>includeEnd('debug');
return this._minimumLevel;
}
},
/**
* Gets the tiling scheme used by this provider. This function should
* not be called before {@link UrlTemplateImageryProvider#ready} returns true.
* @memberof UrlTemplateImageryProvider.prototype
* @type {TilingScheme}
* @readonly
* @default new WebMercatorTilingScheme()
*/
tilingScheme : {
get : function() {
//>>includeStart('debug', pragmas.debug);
if (!this.ready) {
throw new DeveloperError('tilingScheme must not be called before the imagery provider is ready.');
}
//>>includeEnd('debug');
return this._tilingScheme;
}
},
/**
* Gets the rectangle, in radians, of the imagery provided by this instance. This function should
* not be called before {@link UrlTemplateImageryProvider#ready} returns true.
* @memberof UrlTemplateImageryProvider.prototype
* @type {Rectangle}
* @readonly
* @default tilingScheme.rectangle
*/
rectangle : {
get : function() {
//>>includeStart('debug', pragmas.debug);
if (!this.ready) {
throw new DeveloperError('rectangle must not be called before the imagery provider is ready.');
}
//>>includeEnd('debug');
return this._rectangle;
}
},
/**
* Gets the tile discard policy. If not undefined, the discard policy is responsible
* for filtering out "missing" tiles via its shouldDiscardImage function. If this function
* returns undefined, no tiles are filtered. This function should
* not be called before {@link UrlTemplateImageryProvider#ready} returns true.
* @memberof UrlTemplateImageryProvider.prototype
* @type {TileDiscardPolicy}
* @readonly
* @default undefined
*/
tileDiscardPolicy : {
get : function() {
//>>includeStart('debug', pragmas.debug);
if (!this.ready) {
throw new DeveloperError('tileDiscardPolicy must not be called before the imagery provider is ready.');
}
//>>includeEnd('debug');
return this._tileDiscardPolicy;
}
},
/**
* Gets an event that is raised when the imagery provider encounters an asynchronous error. By subscribing
* to the event, you will be notified of the error and can potentially recover from it. Event listeners
* are passed an instance of {@link TileProviderError}.
* @memberof UrlTemplateImageryProvider.prototype
* @type {Event}
* @readonly
*/
errorEvent : {
get : function() {
return this._errorEvent;
}
},
/**
* Gets a value indicating whether or not the provider is ready for use.
* @memberof UrlTemplateImageryProvider.prototype
* @type {Boolean}
* @readonly
*/
ready : {
get : function() {
return defined(this._urlParts);
}
},
/**
* Gets a promise that resolves to true when the provider is ready for use.
* @memberof UrlTemplateImageryProvider.prototype
* @type {Promise.<Boolean>}
* @readonly
*/
readyPromise : {
get : function() {
return this._readyPromise;
}
},
/**
* Gets the credit to display when this imagery provider is active. Typically this is used to credit
* the source of the imagery. This function should not be called before {@link UrlTemplateImageryProvider#ready} returns true.
* @memberof UrlTemplateImageryProvider.prototype
* @type {Credit}
* @readonly
* @default undefined
*/
credit : {
get : function() {
//>>includeStart('debug', pragmas.debug);
if (!this.ready) {
throw new DeveloperError('credit must not be called before the imagery provider is ready.');
}
//>>includeEnd('debug');
return this._credit;
}
},
/**
* Gets a value indicating whether or not the images provided by this imagery provider
* include an alpha channel. If this property is false, an alpha channel, if present, will
* be ignored. If this property is true, any images without an alpha channel will be treated
* as if their alpha is 1.0 everywhere. When this property is false, memory usage
* and texture upload time are reduced. This function should
* not be called before {@link ImageryProvider#ready} returns true.
* @memberof UrlTemplateImageryProvider.prototype
* @type {Boolean}
* @readonly
* @default true
*/
hasAlphaChannel : {
get : function() {
//>>includeStart('debug', pragmas.debug);
if (!this.ready) {
throw new DeveloperError('hasAlphaChannel must not be called before the imagery provider is ready.');
}
//>>includeEnd('debug');
return this._hasAlphaChannel;
}
}
});
/**
* Reinitializes this instance. Reinitializing an instance already in use is supported, but it is not
* recommended because existing tiles provided by the imagery provider will not be updated.
*
* @param {Promise.<Object>|Object} options Any of the options that may be passed to the {@link UrlTemplateImageryProvider} constructor.
*/
UrlTemplateImageryProvider.prototype.reinitialize = function(options) {
var that = this;
that._readyPromise = when(options).then(function(properties) {
//>>includeStart('debug', pragmas.debug);
if (!defined(properties)) {
throw new DeveloperError('options is required.');
}
if (!defined(properties.url)) {
throw new DeveloperError('options.url is required.');
}
//>>includeEnd('debug');
that.enablePickFeatures = defaultValue(properties.enablePickFeatures, that.enablePickFeatures);
that._url = properties.url;
that._urlSchemeZeroPadding = defaultValue(properties.urlSchemeZeroPadding, that.urlSchemeZeroPadding);
that._pickFeaturesUrl = properties.pickFeaturesUrl;
that._proxy = properties.proxy;
that._tileDiscardPolicy = properties.tileDiscardPolicy;
that._getFeatureInfoFormats = properties.getFeatureInfoFormats;
that._subdomains = properties.subdomains;
if (isArray(that._subdomains)) {
that._subdomains = that._subdomains.slice();
} else if (defined(that._subdomains) && that._subdomains.length > 0) {
that._subdomains = that._subdomains.split('');
} else {
that._subdomains = ['a', 'b', 'c'];
}
that._tileWidth = defaultValue(properties.tileWidth, 256);
that._tileHeight = defaultValue(properties.tileHeight, 256);
that._minimumLevel = defaultValue(properties.minimumLevel, 0);
that._maximumLevel = properties.maximumLevel;
that._tilingScheme = defaultValue(properties.tilingScheme, new WebMercatorTilingScheme({ ellipsoid : properties.ellipsoid }));
that._rectangle = defaultValue(properties.rectangle, that._tilingScheme.rectangle);
that._rectangle = Rectangle.intersection(that._rectangle, that._tilingScheme.rectangle);
that._hasAlphaChannel = defaultValue(properties.hasAlphaChannel, true);
var credit = properties.credit;
if (typeof credit === 'string') {
credit = new Credit(credit);
}
that._credit = credit;
that._urlParts = urlTemplateToParts(that._url, tags);
that._pickFeaturesUrlParts = urlTemplateToParts(that._pickFeaturesUrl, pickFeaturesTags);
return true;
});
};
/**
* Gets the credits to be displayed when a given tile is displayed.
*
* @param {Number} x The tile X coordinate.
* @param {Number} y The tile Y coordinate.
* @param {Number} level The tile level;
* @returns {Credit[]} The credits to be displayed when the tile is displayed.
*
* @exception {DeveloperError} <code>getTileCredits</code> must not be called before the imagery provider is ready.
*/
UrlTemplateImageryProvider.prototype.getTileCredits = function(x, y, level) {
//>>includeStart('debug', pragmas.debug);
if (!this.ready) {
throw new DeveloperError('getTileCredits must not be called before the imagery provider is ready.');
}
//>>includeEnd('debug');
return undefined;
};
/**
* Requests the image for a given tile. This function should
* not be called before {@link UrlTemplateImageryProvider#ready} returns true.
*
* @param {Number} x The tile X coordinate.
* @param {Number} y The tile Y coordinate.
* @param {Number} level The tile level.
* @returns {Promise.<Image|Canvas>|undefined} A promise for the image that will resolve when the image is available, or
* undefined if there are too many active requests to the server, and the request
* should be retried later. The resolved image may be either an
* Image or a Canvas DOM object.
*/
UrlTemplateImageryProvider.prototype.requestImage = function(x, y, level) {
//>>includeStart('debug', pragmas.debug);
if (!this.ready) {
throw new DeveloperError('requestImage must not be called before the imagery provider is ready.');
}
//>>includeEnd('debug');
var url = buildImageUrl(this, x, y, level);
return ImageryProvider.loadImage(this, url);
};
/**
* Asynchronously determines what features, if any, are located at a given longitude and latitude within
* a tile. This function should not be called before {@link ImageryProvider#ready} returns true.
*
* @param {Number} x The tile X coordinate.
* @param {Number} y The tile Y coordinate.
* @param {Number} level The tile level.
* @param {Number} longitude The longitude at which to pick features.
* @param {Number} latitude The latitude at which to pick features.
* @return {Promise.<ImageryLayerFeatureInfo[]>|undefined} A promise for the picked features that will resolve when the asynchronous
* picking completes. The resolved value is an array of {@link ImageryLayerFeatureInfo}
* instances. The array may be empty if no features are found at the given location.
* It may also be undefined if picking is not supported.
*/
UrlTemplateImageryProvider.prototype.pickFeatures = function(x, y, level, longitude, latitude) {
//>>includeStart('debug', pragmas.debug);
if (!this.ready) {
throw new DeveloperError('pickFeatures must not be called before the imagery provider is ready.');
}
//>>includeEnd('debug');
if (!this.enablePickFeatures || !defined(this._pickFeaturesUrl) || this._getFeatureInfoFormats.length === 0) {
return undefined;
}
var formatIndex = 0;
var that = this;
function handleResponse(format, data) {
return format.callback(data);
}
function doRequest() {
if (formatIndex >= that._getFeatureInfoFormats.length) {
// No valid formats, so no features picked.
return when([]);
}
var format = that._getFeatureInfoFormats[formatIndex];
var url = buildPickFeaturesUrl(that, x, y, level, longitude, latitude, format.format);
++formatIndex;
if (format.type === 'json') {
return loadJson(url).then(format.callback).otherwise(doRequest);
} else if (format.type === 'xml') {
return loadXML(url).then(format.callback).otherwise(doRequest);
} else if (format.type === 'text' || format.type === 'html') {
return loadText(url).then(format.callback).otherwise(doRequest);
} else {
return loadWithXhr({
url: url,
responseType: format.format
}).then(handleResponse.bind(undefined, format)).otherwise(doRequest);
}
}
return doRequest();
};
function buildImageUrl(imageryProvider, x, y, level) {
degreesScratchComputed = false;
projectedScratchComputed = false;
return buildUrl(imageryProvider, imageryProvider._urlParts, function(partFunction) {
return partFunction(imageryProvider, x, y, level);
});
}
function buildPickFeaturesUrl(imageryProvider, x, y, level, longitude, latitude, format) {
degreesScratchComputed = false;
projectedScratchComputed = false;
ijScratchComputed = false;
longitudeLatitudeProjectedScratchComputed = false;
return buildUrl(imageryProvider, imageryProvider._pickFeaturesUrlParts, function(partFunction) {
return partFunction(imageryProvider, x, y, level, longitude, latitude, format);
});
}
function buildUrl(imageryProvider, parts, partFunctionInvoker) {
var url = '';
for (var i = 0; i < parts.length; ++i) {
var part = parts[i];
if (typeof part === 'string') {
url += part;
} else {
url += encodeURIComponent(partFunctionInvoker(part));
}
}
var proxy = imageryProvider._proxy;
if (defined(proxy)) {
url = proxy.getURL(url);
}
return url;
}
function urlTemplateToParts(url, tags) {
if (!defined(url)) {
return undefined;
}
var parts = [];
var nextIndex = 0;
var minIndex;
var minTag;
var tagList = Object.keys(tags);
while (nextIndex < url.length) {
minIndex = Number.MAX_VALUE;
minTag = undefined;
for (var i = 0; i < tagList.length; ++i) {
var thisIndex = url.indexOf(tagList[i], nextIndex);
if (thisIndex >= 0 && thisIndex < minIndex) {
minIndex = thisIndex;
minTag = tagList[i];
}
}
if (!defined(minTag)) {
parts.push(url.substring(nextIndex));
nextIndex = url.length;
} else {
if (nextIndex < minIndex) {
parts.push(url.substring(nextIndex, minIndex));
}
parts.push(tags[minTag]);
nextIndex = minIndex + minTag.length;
}
}
return parts;
}
function padWithZerosIfNecessary(imageryProvider, key, value) {
if (imageryProvider &&
imageryProvider.urlSchemeZeroPadding &&
imageryProvider.urlSchemeZeroPadding.hasOwnProperty(key) )
{
var paddingTemplate = imageryProvider.urlSchemeZeroPadding[key];
if (typeof paddingTemplate === 'string') {
var paddingTemplateWidth = paddingTemplate.length;
if (paddingTemplateWidth > 1) {
value = (value.length >= paddingTemplateWidth) ? value : new Array(paddingTemplateWidth - value.toString().length + 1).join('0') + value;
}
}
}
return value;
}
function xTag(imageryProvider, x, y, level) {
return padWithZerosIfNecessary(imageryProvider, '{x}', x);
}
function reverseXTag(imageryProvider, x, y, level) {
var reverseX = imageryProvider.tilingScheme.getNumberOfXTilesAtLevel(level) - x - 1;
return padWithZerosIfNecessary(imageryProvider, '{reverseX}', reverseX);
}
function yTag(imageryProvider, x, y, level) {
return padWithZerosIfNecessary(imageryProvider, '{y}', y);
}
function reverseYTag(imageryProvider, x, y, level) {
var reverseY = imageryProvider.tilingScheme.getNumberOfYTilesAtLevel(level) - y - 1;
return padWithZerosIfNecessary(imageryProvider, '{reverseY}', reverseY);
}
function reverseZTag(imageryProvider, x, y, level) {
var maximumLevel = imageryProvider.maximumLevel;
var reverseZ = defined(maximumLevel) && level < maximumLevel ? maximumLevel - level - 1 : level;
return padWithZerosIfNecessary(imageryProvider, '{reverseZ}', reverseZ);
}
function zTag(imageryProvider, x, y, level) {
return padWithZerosIfNecessary(imageryProvider, '{z}', level);
}
function sTag(imageryProvider, x, y, level) {
var index = (x + y + level) % imageryProvider._subdomains.length;
return imageryProvider._subdomains[index];
}
var degreesScratchComputed = false;
var degreesScratch = new Rectangle();
function computeDegrees(imageryProvider, x, y, level) {
if (degreesScratchComputed) {
return;
}
imageryProvider.tilingScheme.tileXYToRectangle(x, y, level, degreesScratch);
degreesScratch.west = CesiumMath.toDegrees(degreesScratch.west);
degreesScratch.south = CesiumMath.toDegrees(degreesScratch.south);
degreesScratch.east = CesiumMath.toDegrees(degreesScratch.east);
degreesScratch.north = CesiumMath.toDegrees(degreesScratch.north);
degreesScratchComputed = true;
}
function westDegreesTag(imageryProvider, x, y, level) {
computeDegrees(imageryProvider, x, y, level);
return degreesScratch.west;
}
function southDegreesTag(imageryProvider, x, y, level) {
computeDegrees(imageryProvider, x, y, level);
return degreesScratch.south;
}
function eastDegreesTag(imageryProvider, x, y, level) {
computeDegrees(imageryProvider, x, y, level);
return degreesScratch.east;
}
function northDegreesTag(imageryProvider, x, y, level) {
computeDegrees(imageryProvider, x, y, level);
return degreesScratch.north;
}
var projectedScratchComputed = false;
var projectedScratch = new Rectangle();
function computeProjected(imageryProvider, x, y, level) {
if (projectedScratchComputed) {
return;
}
imageryProvider.tilingScheme.tileXYToNativeRectangle(x, y, level, projectedScratch);
projectedScratchComputed = true;
}
function westProjectedTag(imageryProvider, x, y, level) {
computeProjected(imageryProvider, x, y, level);
return projectedScratch.west;
}
function southProjectedTag(imageryProvider, x, y, level) {
computeProjected(imageryProvider, x, y, level);
return projectedScratch.south;
}
function eastProjectedTag(imageryProvider, x, y, level) {
computeProjected(imageryProvider, x, y, level);
return projectedScratch.east;
}
function northProjectedTag(imageryProvider, x, y, level) {
computeProjected(imageryProvider, x, y, level);
return projectedScratch.north;
}
function widthTag(imageryProvider, x, y, level) {
return imageryProvider.tileWidth;
}
function heightTag(imageryProvider, x, y, level) {
return imageryProvider.tileHeight;
}
var ijScratchComputed = false;
var ijScratch = new Cartesian2();
function iTag(imageryProvider, x, y, level, longitude, latitude, format) {
computeIJ(imageryProvider, x, y, level, longitude, latitude);
return ijScratch.x;
}
function jTag(imageryProvider, x, y, level, longitude, latitude, format) {
computeIJ(imageryProvider, x, y, level, longitude, latitude);
return ijScratch.y;
}
function reverseITag(imageryProvider, x, y, level, longitude, latitude, format) {
computeIJ(imageryProvider, x, y, level, longitude, latitude);
return imageryProvider.tileWidth - ijScratch.x - 1;
}
function reverseJTag(imageryProvider, x, y, level, longitude, latitude, format) {
computeIJ(imageryProvider, x, y, level, longitude, latitude);
return imageryProvider.tileHeight - ijScratch.y - 1;
}
var rectangleScratch = new Rectangle();
function computeIJ(imageryProvider, x, y, level, longitude, latitude, format) {
if (ijScratchComputed) {
return;
}
computeLongitudeLatitudeProjected(imageryProvider, x, y, level, longitude, latitude);
var projected = longitudeLatitudeProjectedScratch;
var rectangle = imageryProvider.tilingScheme.tileXYToNativeRectangle(x, y, level, rectangleScratch);
ijScratch.x = (imageryProvider.tileWidth * (projected.x - rectangle.west) / rectangle.width) | 0;
ijScratch.y = (imageryProvider.tileHeight * (rectangle.north - projected.y) / rectangle.height) | 0;
ijScratchComputed = true;
}
function longitudeDegreesTag(imageryProvider, x, y, level, longitude, latitude, format) {
return CesiumMath.toDegrees(longitude);
}
function latitudeDegreesTag(imageryProvider, x, y, level, longitude, latitude, format) {
return CesiumMath.toDegrees(latitude);
}
var longitudeLatitudeProjectedScratchComputed = false;
var longitudeLatitudeProjectedScratch = new Cartesian3();
function longitudeProjectedTag(imageryProvider, x, y, level, longitude, latitude, format) {
computeLongitudeLatitudeProjected(imageryProvider, x, y, level, longitude, latitude);
return longitudeLatitudeProjectedScratch.x;
}
function latitudeProjectedTag(imageryProvider, x, y, level, longitude, latitude, format) {
computeLongitudeLatitudeProjected(imageryProvider, x, y, level, longitude, latitude);
return longitudeLatitudeProjectedScratch.y;
}
var cartographicScratch = new Cartographic();
function computeLongitudeLatitudeProjected(imageryProvider, x, y, level, longitude, latitude, format) {
if (longitudeLatitudeProjectedScratchComputed) {
return;
}
var projected;
if (imageryProvider.tilingScheme instanceof GeographicTilingScheme) {
longitudeLatitudeProjectedScratch.x = CesiumMath.toDegrees(longitude);
longitudeLatitudeProjectedScratch.y = CesiumMath.toDegrees(latitude);
} else {
var cartographic = cartographicScratch;
cartographic.longitude = longitude;
cartographic.latitude = latitude;
projected = imageryProvider.tilingScheme.projection.project(cartographic, longitudeLatitudeProjectedScratch);
}
longitudeLatitudeProjectedScratchComputed = true;
}
function formatTag(imageryProvider, x, y, level, longitude, latitude, format) {
return format;
}
var tags = {
'{x}': xTag,
'{y}': yTag,
'{z}': zTag,
'{s}': sTag,
'{reverseX}': reverseXTag,
'{reverseY}': reverseYTag,
'{reverseZ}': reverseZTag,
'{westDegrees}': westDegreesTag,
'{southDegrees}': southDegreesTag,
'{eastDegrees}': eastDegreesTag,
'{northDegrees}': northDegreesTag,
'{westProjected}': westProjectedTag,
'{southProjected}': southProjectedTag,
'{eastProjected}': eastProjectedTag,
'{northProjected}': northProjectedTag,
'{width}': widthTag,
'{height}': heightTag
};
var pickFeaturesTags = combine(tags, {
'{i}' : iTag,
'{j}' : jTag,
'{reverseI}' : reverseITag,
'{reverseJ}' : reverseJTag,
'{longitudeDegrees}' : longitudeDegreesTag,
'{latitudeDegrees}' : latitudeDegreesTag,
'{longitudeProjected}' : longitudeProjectedTag,
'{latitudeProjected}' : latitudeProjectedTag,
'{format}' : formatTag
});
return UrlTemplateImageryProvider;
});