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import {TileLayer} from './TileLayer';
import {extend, setOptions, getParamString} from '../../core/Util';
import {retina} from '../../core/Browser';
import {EPSG4326} from '../../geo/crs/CRS.EPSG4326';
import {toBounds} from '../../geometry/Bounds';
/*
* @class TileLayer.WMS
* @inherits TileLayer
* @aka L.TileLayer.WMS
* Used to display [WMS](https://en.wikipedia.org/wiki/Web_Map_Service) services as tile layers on the map. Extends `TileLayer`.
*
* @example
*
* ```js
* var nexrad = L.tileLayer.wms("http://mesonet.agron.iastate.edu/cgi-bin/wms/nexrad/n0r.cgi", {
* layers: 'nexrad-n0r-900913',
* format: 'image/png',
* transparent: true,
* attribution: "Weather data © 2012 IEM Nexrad"
* });
* ```
*/
export var TileLayerWMS = TileLayer.extend({
// @section
// @aka TileLayer.WMS options
// If any custom options not documented here are used, they will be sent to the
// WMS server as extra parameters in each request URL. This can be useful for
// [non-standard vendor WMS parameters](http://docs.geoserver.org/stable/en/user/services/wms/vendor.html).
defaultWmsParams: {
service: 'WMS',
request: 'GetMap',
// @option layers: String = ''
// **(required)** Comma-separated list of WMS layers to show.
layers: '',
// @option styles: String = ''
// Comma-separated list of WMS styles.
styles: '',
// @option format: String = 'image/jpeg'
// WMS image format (use `'image/png'` for layers with transparency).
format: 'image/jpeg',
// @option transparent: Boolean = false
// If `true`, the WMS service will return images with transparency.
transparent: false,
// @option version: String = '1.1.1'
// Version of the WMS service to use
version: '1.1.1'
},
options: {
// @option crs: CRS = null
// Coordinate Reference System to use for the WMS requests, defaults to
// map CRS. Don't change this if you're not sure what it means.
crs: null,
// @option uppercase: Boolean = false
// If `true`, WMS request parameter keys will be uppercase.
uppercase: false
},
initialize: function (url, options) {
this._url = url;
var wmsParams = extend({}, this.defaultWmsParams);
// all keys that are not TileLayer options go to WMS params
for (var i in options) {
if (!(i in this.options)) {
wmsParams[i] = options[i];
}
}
options = setOptions(this, options);
var realRetina = options.detectRetina && retina ? 2 : 1;
var tileSize = this.getTileSize();
wmsParams.width = tileSize.x * realRetina;
wmsParams.height = tileSize.y * realRetina;
this.wmsParams = wmsParams;
},
onAdd: function (map) {
this._crs = this.options.crs || map.options.crs;
this._wmsVersion = parseFloat(this.wmsParams.version);
var projectionKey = this._wmsVersion >= 1.3 ? 'crs' : 'srs';
this.wmsParams[projectionKey] = this._crs.code;
TileLayer.prototype.onAdd.call(this, map);
},
getTileUrl: function (coords) {
var tileBounds = this._tileCoordsToNwSe(coords),
crs = this._crs,
bounds = toBounds(crs.project(tileBounds[0]), crs.project(tileBounds[1])),
min = bounds.min,
max = bounds.max,
bbox = (this._wmsVersion >= 1.3 && this._crs === EPSG4326 ?
[min.y, min.x, max.y, max.x] :
[min.x, min.y, max.x, max.y]).join(','),
url = L.TileLayer.prototype.getTileUrl.call(this, coords);
return url +
getParamString(this.wmsParams, url, this.options.uppercase) +
(this.options.uppercase ? '&BBOX=' : '&bbox=') + bbox;
},
// @method setParams(params: Object, noRedraw?: Boolean): this
// Merges an object with the new parameters and re-requests tiles on the current screen (unless `noRedraw` was set to true).
setParams: function (params, noRedraw) {
extend(this.wmsParams, params);
if (!noRedraw) {
this.redraw();
}
return this;
}
});
// @factory L.tileLayer.wms(baseUrl: String, options: TileLayer.WMS options)
// Instantiates a WMS tile layer object given a base URL of the WMS service and a WMS parameters/options object.
export function tileLayerWMS(url, options) {
return new TileLayerWMS(url, options);
}
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