// 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('goog.array');
goog.require('goog.asserts');
goog.require('goog.math');
goog.require('goog.object');
goog.require('goog.string');
goog.require('goog.uri.utils');
goog.require('ol');
goog.require('ol.TileCoord');
goog.require('ol.TileUrlFunction');
goog.require('ol.extent');
goog.require('ol.source.TileImage');
goog.require('ol.source.wms');
goog.require('ol.source.wms.ServerType');
/**
* @constructor
* @extends {ol.source.TileImage}
* @param {olx.source.TileWMSOptions=} opt_options Tile WMS options.
* @todo api
*/
ol.source.TileWMS = function(opt_options) {
var options = goog.isDef(opt_options) ? opt_options : {};
var params = goog.isDef(options.params) ? options.params : {};
var transparent = goog.object.get(params, 'TRANSPARENT', true);
goog.base(this, {
attributions: options.attributions,
crossOrigin: options.crossOrigin,
extent: options.extent,
logo: options.logo,
opaque: !transparent,
projection: options.projection,
tileGrid: options.tileGrid,
tileLoadFunction: options.tileLoadFunction,
tileUrlFunction: goog.bind(this.tileUrlFunction_, this)
});
var urls = options.urls;
if (!goog.isDef(urls) && goog.isDef(options.url)) {
urls = ol.TileUrlFunction.expandUrl(options.url);
}
/**
* @private
* @type {Array.<string>|undefined}
*/
this.urls_ = urls;
/**
* @private
* @type {number}
*/
this.gutter_ = goog.isDef(options.gutter) ? options.gutter : 0;
/**
* @private
* @type {Object}
*/
this.params_ = params;
/**
* @private
* @type {number}
*/
this.pixelRatio_ = NaN;
/**
* @private
* @type {boolean}
*/
this.v13_ = true;
/**
* @private
* @type {ol.source.wms.ServerType|undefined}
*/
this.serverType_ =
/** @type {ol.source.wms.ServerType|undefined} */ (options.serverType);
/**
* @private
* @type {boolean}
*/
this.hidpi_ = goog.isDef(options.hidpi) ? options.hidpi : true;
/**
* @private
* @type {string}
*/
this.coordKeyPrefix_ = '';
this.resetCoordKeyPrefix_();
/**
* @private
* @type {ol.Extent}
*/
this.tmpExtent_ = ol.extent.createEmpty();
this.updateV13_();
};
goog.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.proj.Projection} 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.
* @todo api
*/
ol.source.TileWMS.prototype.getGetFeatureInfoUrl =
function(coordinate, resolution, projection, params) {
goog.asserts.assert(!('VERSION' in params));
var pixelRatio = this.pixelRatio_;
if (isNaN(this.pixelRatio_)) {
return undefined;
}
var tileGrid = this.getTileGrid();
if (goog.isNull(tileGrid)) {
tileGrid = this.getTileGridForProjection(projection);
}
var tileCoord = tileGrid.getTileCoordForCoordAndResolution(
coordinate, resolution);
if (tileGrid.getResolutions().length <= tileCoord.z) {
return undefined;
}
var tileResolution = tileGrid.getResolution(tileCoord.z);
var tileExtent = tileGrid.getTileCoordExtent(
tileCoord, this.tmpExtent_);
var tileSize = tileGrid.getTileSize(tileCoord.z);
var gutter = this.gutter_;
if (gutter !== 0) {
tileSize += 2 * gutter;
tileExtent = ol.extent.buffer(tileExtent,
tileResolution * gutter, tileExtent);
}
if (pixelRatio != 1) {
tileSize = (tileSize * pixelRatio + 0.5) | 0;
}
var baseParams = {
'SERVICE': 'WMS',
'VERSION': ol.DEFAULT_WMS_VERSION,
'REQUEST': 'GetFeatureInfo',
'FORMAT': 'image/png',
'TRANSPARENT': true,
'QUERY_LAYERS': goog.object.get(this.params_, 'LAYERS')
};
goog.object.extend(baseParams, this.params_, params);
var x = Math.floor((coordinate[0] - tileExtent[0]) /
(tileResolution / pixelRatio));
var y = Math.floor((tileExtent[3] - coordinate[1]) /
(tileResolution / pixelRatio));
goog.object.set(baseParams, this.v13_ ? 'I' : 'X', x);
goog.object.set(baseParams, this.v13_ ? 'J' : 'Y', y);
return this.getRequestUrl_(tileCoord, tileSize, tileExtent,
pixelRatio, projection, baseParams);
};
/**
* @inheritDoc
*/
ol.source.TileWMS.prototype.getGutter = function() {
return this.gutter_;
};
/**
* @inheritDoc
*/
ol.source.TileWMS.prototype.getKeyZXY = function(z, x, y) {
return this.coordKeyPrefix_ + goog.base(this, 'getKeyZXY', 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.
* @todo api
*/
ol.source.TileWMS.prototype.getParams = function() {
return this.params_;
};
/**
* @param {ol.TileCoord} tileCoord Tile coordinate.
* @param {number} 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 (!goog.isDef(urls) || goog.array.isEmpty(urls)) {
return undefined;
}
goog.object.set(params, 'WIDTH', tileSize);
goog.object.set(params, 'HEIGHT', tileSize);
params[this.v13_ ? 'CRS' : 'SRS'] = projection.getCode();
if (!('STYLES' in this.params_)) {
/* jshint -W053 */
goog.object.set(params, 'STYLES', new String(''));
/* jshint +W053 */
}
if (pixelRatio != 1) {
switch (this.serverType_) {
case ol.source.wms.ServerType.GEOSERVER:
var dpi = (90 * pixelRatio + 0.5) | 0;
goog.object.set(params, 'FORMAT_OPTIONS', 'dpi:' + dpi);
break;
case ol.source.wms.ServerType.MAPSERVER:
goog.object.set(params, 'MAP_RESOLUTION', 90 * pixelRatio);
break;
case ol.source.wms.ServerType.CARMENTA_SERVER:
case ol.source.wms.ServerType.QGIS:
goog.object.set(params, 'DPI', 90 * pixelRatio);
break;
default:
goog.asserts.fail();
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;
}
goog.object.set(params, 'BBOX', bbox.join(','));
var url;
if (urls.length == 1) {
url = urls[0];
} else {
var index = goog.math.modulo(tileCoord.hash(), this.urls_.length);
url = urls[index];
}
return goog.uri.utils.appendParamsFromMap(url, params);
};
/**
* @param {number} z Z.
* @param {number} pixelRatio Pixel ratio.
* @param {ol.proj.Projection} projection Projection.
* @return {number} Size.
*/
ol.source.TileWMS.prototype.getTilePixelSize =
function(z, pixelRatio, projection) {
var tileSize = goog.base(this, 'getTilePixelSize', z, pixelRatio, projection);
if (pixelRatio == 1 || !this.hidpi_ || !goog.isDef(this.serverType_)) {
return tileSize;
} else {
return (tileSize * pixelRatio + 0.5) | 0;
}
};
/**
* Return the URLs used for this WMS source.
* @return {Array.<string>|undefined} URLs.
* @todo api
*/
ol.source.TileWMS.prototype.getUrls = function() {
return this.urls_;
};
/**
* @private
*/
ol.source.TileWMS.prototype.resetCoordKeyPrefix_ = function() {
var i = 0;
var res = [];
for (var key in this.params_) {
res[i++] = key + '-' + this.params_[key];
}
this.coordKeyPrefix_ = res.join('/');
};
/**
* @param {ol.TileCoord} tileCoord Tile coordinate.
* @param {number} pixelRatio Pixel ratio.
* @param {ol.proj.Projection} projection Projection.
* @return {string|undefined} Tile URL.
* @private
*/
ol.source.TileWMS.prototype.tileUrlFunction_ =
function(tileCoord, pixelRatio, projection) {
var tileGrid = this.getTileGrid();
if (goog.isNull(tileGrid)) {
tileGrid = this.getTileGridForProjection(projection);
}
if (tileGrid.getResolutions().length <= tileCoord.z) {
return undefined;
}
if (pixelRatio != 1 && (!this.hidpi_ || !goog.isDef(this.serverType_))) {
pixelRatio = 1;
}
var tileResolution = tileGrid.getResolution(tileCoord.z);
var tileExtent = tileGrid.getTileCoordExtent(
tileCoord, this.tmpExtent_);
var tileSize = tileGrid.getTileSize(tileCoord.z);
var gutter = this.gutter_;
if (gutter !== 0) {
tileSize += 2 * gutter;
tileExtent = ol.extent.buffer(tileExtent,
tileResolution * gutter, tileExtent);
}
var extent = this.getExtent();
if (!goog.isNull(extent) && (!ol.extent.intersects(tileExtent, extent) ||
ol.extent.touches(tileExtent, extent))) {
return undefined;
}
if (pixelRatio != 1) {
tileSize = (tileSize * pixelRatio + 0.5) | 0;
}
var baseParams = {
'SERVICE': 'WMS',
'VERSION': ol.DEFAULT_WMS_VERSION,
'REQUEST': 'GetMap',
'FORMAT': 'image/png',
'TRANSPARENT': true
};
goog.object.extend(baseParams, this.params_);
this.pixelRatio_ = pixelRatio;
return this.getRequestUrl_(tileCoord, tileSize, tileExtent,
pixelRatio, projection, baseParams);
};
/**
* Update the user-provided params.
* @param {Object} params Params.
* @todo api
*/
ol.source.TileWMS.prototype.updateParams = function(params) {
goog.object.extend(this.params_, params);
this.resetCoordKeyPrefix_();
this.updateV13_();
this.dispatchChangeEvent();
};
/**
* @private
*/
ol.source.TileWMS.prototype.updateV13_ = function() {
var version =
goog.object.get(this.params_, 'VERSION', ol.DEFAULT_WMS_VERSION);
this.v13_ = goog.string.compareVersions(version, '1.3') >= 0;
};
OpenLayers 3