444 lines
11 KiB
JavaScript
444 lines
11 KiB
JavaScript
// 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');
|
||
|
||
|
||
|
||
/**
|
||
* @classdesc
|
||
* Layer source for tile data from WMS servers.
|
||
*
|
||
* @constructor
|
||
* @extends {ol.source.TileImage}
|
||
* @param {olx.source.TileWMSOptions=} opt_options Tile WMS options.
|
||
* @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>}
|
||
*/
|
||
this.urls_ = goog.isDefAndNotNull(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.
|
||
* @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.
|
||
* @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.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(), 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>} URLs.
|
||
* @api
|
||
*/
|
||
ol.source.TileWMS.prototype.getUrls = function() {
|
||
return this.urls_;
|
||
};
|
||
|
||
|
||
/**
|
||
* @private
|
||
*/
|
||
ol.source.TileWMS.prototype.resetCoordKeyPrefix_ = function() {
|
||
var i = 0;
|
||
var res = [];
|
||
|
||
var j, jj;
|
||
for (j = 0, jj = this.urls_.length; j < jj; ++j) {
|
||
res[i++] = this.urls_[j];
|
||
}
|
||
|
||
var key;
|
||
for (key in this.params_) {
|
||
res[i++] = key + '-' + this.params_[key];
|
||
}
|
||
|
||
this.coordKeyPrefix_ = res.join('#');
|
||
};
|
||
|
||
|
||
/**
|
||
* @param {string|undefined} url URL.
|
||
* @api
|
||
*/
|
||
ol.source.TileWMS.prototype.setUrl = function(url) {
|
||
var urls = goog.isDef(url) ? ol.TileUrlFunction.expandUrl(url) : null;
|
||
this.setUrls(urls);
|
||
};
|
||
|
||
|
||
/**
|
||
* @param {Array.<string>|undefined} urls URLs.
|
||
* @api
|
||
*/
|
||
ol.source.TileWMS.prototype.setUrls = function(urls) {
|
||
this.urls_ = goog.isDefAndNotNull(urls) ? urls : [];
|
||
this.resetCoordKeyPrefix_();
|
||
this.dispatchChangeEvent();
|
||
};
|
||
|
||
|
||
/**
|
||
* @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.
|
||
* @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;
|
||
};
|