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openlayers

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Build tools and sources for developing OpenLayers based mapping applications

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// FIXME add minZoom support // FIXME add date line wrap (tile coord transform) // FIXME cannot be shared between maps with different projections goog.provide('ol.source.TileWMS'); goog.require('ol'); goog.require('ol.asserts'); goog.require('ol.extent'); goog.require('ol.obj'); goog.require('ol.math'); goog.require('ol.proj'); goog.require('ol.size'); goog.require('ol.source.TileImage'); goog.require('ol.source.WMSServerType'); goog.require('ol.tilecoord'); goog.require('ol.string'); goog.require('ol.uri'); /** * @classdesc * Layer source for tile data from WMS servers. * * @constructor * @extends {ol.source.TileImage} * @param {olx.source.TileWMSOptions=} opt_options Tile WMS options. * @api stable */ ol.source.TileWMS = function(opt_options) { var options = opt_options || {}; var params = options.params || {}; var transparent = 'TRANSPARENT' in params ? params['TRANSPARENT'] : true; ol.source.TileImage.call(this, { attributions: options.attributions, cacheSize: options.cacheSize, crossOrigin: options.crossOrigin, logo: options.logo, opaque: !transparent, projection: options.projection, reprojectionErrorThreshold: options.reprojectionErrorThreshold, tileGrid: options.tileGrid, tileLoadFunction: options.tileLoadFunction, url: options.url, urls: options.urls, wrapX: options.wrapX !== undefined ? options.wrapX : true }); /** * @private * @type {number} */ this.gutter_ = options.gutter !== undefined ? options.gutter : 0; /** * @private * @type {!Object} */ this.params_ = params; /** * @private * @type {boolean} */ this.v13_ = true; /** * @private * @type {ol.source.WMSServerType|undefined} */ this.serverType_ = /** @type {ol.source.WMSServerType|undefined} */ (options.serverType); /** * @private * @type {boolean} */ this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true; /** * @private * @type {string} */ this.coordKeyPrefix_ = ''; this.resetCoordKeyPrefix_(); /** * @private * @type {ol.Extent} */ this.tmpExtent_ = ol.extent.createEmpty(); this.updateV13_(); this.setKey(this.getKeyForParams_()); }; ol.inherits(ol.source.TileWMS, ol.source.TileImage); /** * Return the GetFeatureInfo URL for the passed coordinate, resolution, and * projection. Return `undefined` if the GetFeatureInfo URL cannot be * constructed. * @param {ol.Coordinate} coordinate Coordinate. * @param {number} resolution Resolution. * @param {ol.ProjectionLike} projection Projection. * @param {!Object} params GetFeatureInfo params. `INFO_FORMAT` at least should * be provided. If `QUERY_LAYERS` is not provided then the layers specified * in the `LAYERS` parameter will be used. `VERSION` should not be * specified here. * @return {string|undefined} GetFeatureInfo URL. * @api stable */ ol.source.TileWMS.prototype.getGetFeatureInfoUrl = function(coordinate, resolution, projection, params) { ol.DEBUG && console.assert(!('VERSION' in params), 'key VERSION is not allowed in params'); var projectionObj = ol.proj.get(projection); var tileGrid = this.getTileGrid(); if (!tileGrid) { tileGrid = this.getTileGridForProjection(projectionObj); } var tileCoord = tileGrid.getTileCoordForCoordAndResolution( coordinate, resolution); if (tileGrid.getResolutions().length <= tileCoord[0]) { return undefined; } var tileResolution = tileGrid.getResolution(tileCoord[0]); var tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent_); var tileSize = ol.size.toSize( tileGrid.getTileSize(tileCoord[0]), this.tmpSize); var gutter = this.gutter_; if (gutter !== 0) { tileSize = ol.size.buffer(tileSize, gutter, this.tmpSize); tileExtent = ol.extent.buffer(tileExtent, tileResolution * gutter, tileExtent); } var baseParams = { 'SERVICE': 'WMS', 'VERSION': ol.DEFAULT_WMS_VERSION, 'REQUEST': 'GetFeatureInfo', 'FORMAT': 'image/png', 'TRANSPARENT': true, 'QUERY_LAYERS': this.params_['LAYERS'] }; ol.obj.assign(baseParams, this.params_, params); var x = Math.floor((coordinate[0] - tileExtent[0]) / tileResolution); var y = Math.floor((tileExtent[3] - coordinate[1]) / tileResolution); baseParams[this.v13_ ? 'I' : 'X'] = x; baseParams[this.v13_ ? 'J' : 'Y'] = y; return this.getRequestUrl_(tileCoord, tileSize, tileExtent, 1, projectionObj, baseParams); }; /** * @inheritDoc */ ol.source.TileWMS.prototype.getGutterInternal = function() { return this.gutter_; }; /** * @inheritDoc */ ol.source.TileWMS.prototype.getKeyZXY = function(z, x, y) { return this.coordKeyPrefix_ + ol.source.TileImage.prototype.getKeyZXY.call(this, z, x, y); }; /** * Get the user-provided params, i.e. those passed to the constructor through * the "params" option, and possibly updated using the updateParams method. * @return {Object} Params. * @api stable */ ol.source.TileWMS.prototype.getParams = function() { return this.params_; }; /** * @param {ol.TileCoord} tileCoord Tile coordinate. * @param {ol.Size} tileSize Tile size. * @param {ol.Extent} tileExtent Tile extent. * @param {number} pixelRatio Pixel ratio. * @param {ol.proj.Projection} projection Projection. * @param {Object} params Params. * @return {string|undefined} Request URL. * @private */ ol.source.TileWMS.prototype.getRequestUrl_ = function(tileCoord, tileSize, tileExtent, pixelRatio, projection, params) { var urls = this.urls; if (!urls) { return undefined; } params['WIDTH'] = tileSize[0]; params['HEIGHT'] = tileSize[1]; params[this.v13_ ? 'CRS' : 'SRS'] = projection.getCode(); if (!('STYLES' in this.params_)) { params['STYLES'] = ''; } if (pixelRatio != 1) { switch (this.serverType_) { case ol.source.WMSServerType.GEOSERVER: var dpi = (90 * pixelRatio + 0.5) | 0; if ('FORMAT_OPTIONS' in params) { params['FORMAT_OPTIONS'] += ';dpi:' + dpi; } else { params['FORMAT_OPTIONS'] = 'dpi:' + dpi; } break; case ol.source.WMSServerType.MAPSERVER: params['MAP_RESOLUTION'] = 90 * pixelRatio; break; case ol.source.WMSServerType.CARMENTA_SERVER: case ol.source.WMSServerType.QGIS: params['DPI'] = 90 * pixelRatio; break; default: ol.asserts.assert(false, 52); // Unknown `serverType` configured break; } } var axisOrientation = projection.getAxisOrientation(); var bbox = tileExtent; if (this.v13_ && axisOrientation.substr(0, 2) == 'ne') { var tmp; tmp = tileExtent[0]; bbox[0] = tileExtent[1]; bbox[1] = tmp; tmp = tileExtent[2]; bbox[2] = tileExtent[3]; bbox[3] = tmp; } params['BBOX'] = bbox.join(','); var url; if (urls.length == 1) { url = urls[0]; } else { var index = ol.math.modulo(ol.tilecoord.hash(tileCoord), urls.length); url = urls[index]; } return ol.uri.appendParams(url, params); }; /** * @inheritDoc */ ol.source.TileWMS.prototype.getTilePixelRatio = function(pixelRatio) { return (!this.hidpi_ || this.serverType_ === undefined) ? 1 : /** @type {number} */ (pixelRatio); }; /** * @private */ ol.source.TileWMS.prototype.resetCoordKeyPrefix_ = function() { var i = 0; var res = []; if (this.urls) { var j, jj; for (j = 0, jj = this.urls.length; j < jj; ++j) { res[i++] = this.urls[j]; } } this.coordKeyPrefix_ = res.join('#'); }; /** * @private * @return {string} The key for the current params. */ ol.source.TileWMS.prototype.getKeyForParams_ = function() { var i = 0; var res = []; for (var key in this.params_) { res[i++] = key + '-' + this.params_[key]; } return res.join('/'); }; /** * @inheritDoc */ ol.source.TileWMS.prototype.fixedTileUrlFunction = function(tileCoord, pixelRatio, projection) { var tileGrid = this.getTileGrid(); if (!tileGrid) { tileGrid = this.getTileGridForProjection(projection); } if (tileGrid.getResolutions().length <= tileCoord[0]) { return undefined; } if (pixelRatio != 1 && (!this.hidpi_ || this.serverType_ === undefined)) { pixelRatio = 1; } var tileResolution = tileGrid.getResolution(tileCoord[0]); var tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent_); var tileSize = ol.size.toSize( tileGrid.getTileSize(tileCoord[0]), this.tmpSize); var gutter = this.gutter_; if (gutter !== 0) { tileSize = ol.size.buffer(tileSize, gutter, this.tmpSize); tileExtent = ol.extent.buffer(tileExtent, tileResolution * gutter, tileExtent); } if (pixelRatio != 1) { tileSize = ol.size.scale(tileSize, pixelRatio, this.tmpSize); } var baseParams = { 'SERVICE': 'WMS', 'VERSION': ol.DEFAULT_WMS_VERSION, 'REQUEST': 'GetMap', 'FORMAT': 'image/png', 'TRANSPARENT': true }; ol.obj.assign(baseParams, this.params_); return this.getRequestUrl_(tileCoord, tileSize, tileExtent, pixelRatio, projection, baseParams); }; /** * @inheritDoc */ ol.source.TileWMS.prototype.setUrls = function(urls) { ol.source.TileImage.prototype.setUrls.call(this, urls); this.resetCoordKeyPrefix_(); }; /** * Update the user-provided params. * @param {Object} params Params. * @api stable */ ol.source.TileWMS.prototype.updateParams = function(params) { ol.obj.assign(this.params_, params); this.resetCoordKeyPrefix_(); this.updateV13_(); this.setKey(this.getKeyForParams_()); }; /** * @private */ ol.source.TileWMS.prototype.updateV13_ = function() { var version = this.params_['VERSION'] || ol.DEFAULT_WMS_VERSION; this.v13_ = ol.string.compareVersions(version, '1.3') >= 0; };