e027f9771e
This ensures that the attribution only appears once, even if multiple Stamen layers are used in the same map.
118 lines
2.5 KiB
JavaScript
118 lines
2.5 KiB
JavaScript
goog.provide('ol.source.Stamen');
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goog.require('ol.Attribution');
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goog.require('ol.source.XYZ');
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/**
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* @type {Object.<string, {extension: string, opaque: boolean}>}
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*/
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ol.source.StamenLayerConfig = {
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'terrain': {
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extension: 'jpg',
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opaque: true
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},
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'terrain-background': {
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extension: 'jpg',
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opaque: true
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},
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'terrain-labels': {
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extension: 'png',
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opaque: false
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},
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'terrain-lines': {
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extension: 'png',
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opaque: false
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},
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'toner-background': {
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extension: 'png',
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opaque: true
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},
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'toner': {
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extension: 'png',
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opaque: true
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},
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'toner-hybrid': {
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extension: 'png',
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opaque: false
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},
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'toner-labels': {
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extension: 'png',
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opaque: false
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},
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'toner-lines': {
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extension: 'png',
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opaque: false
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},
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'toner-lite': {
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extension: 'png',
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opaque: true
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},
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'watercolor': {
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extension: 'jpg',
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opaque: true
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}
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};
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/**
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* @type {Object.<string, {minZoom: number, maxZoom: number}>}
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*/
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ol.source.StamenProviderConfig = {
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'terrain': {
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minZoom: 4,
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maxZoom: 18
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},
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'toner': {
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minZoom: 0,
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maxZoom: 20
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},
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'watercolor': {
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minZoom: 3,
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maxZoom: 16
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}
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};
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/**
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* @const {Array.<ol.Attribution>}
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*/
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ol.source.STAMEN_ATTRIBUTIONS = [new ol.Attribution(
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'Map tiles by <a href="http://stamen.com">Stamen Design</a>, under ' +
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'<a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>. ' +
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'Data by <a href="http://openstreetmap.org">OpenStreetMap</a>, under ' +
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'<a href="http://creativecommons.org/licenses/by-sa/3.0">CC BY SA</a>.')];
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/**
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* @constructor
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* @extends {ol.source.XYZ}
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* @param {ol.source.StamenOptions} options Options.
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*/
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ol.source.Stamen = function(options) {
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var i = options.layer.indexOf('-');
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var provider = i == -1 ? options.layer : options.layer.slice(0, i);
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goog.asserts.assert(provider in ol.source.StamenProviderConfig);
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var providerConfig = ol.source.StamenProviderConfig[provider];
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goog.asserts.assert(options.layer in ol.source.StamenLayerConfig);
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var layerConfig = ol.source.StamenLayerConfig[options.layer];
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var url = goog.isDef(options.url) ? options.url :
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'http://{a-d}.tile.stamen.com/' + options.layer + '/{z}/{x}/{y}.' +
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layerConfig.extension;
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goog.base(this, {
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attributions: ol.source.STAMEN_ATTRIBUTIONS,
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maxZoom: providerConfig.maxZoom,
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// FIXME uncomment the following when tilegrid supports minZoom
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//minZoom: providerConfig.minZoom,
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opaque: layerConfig.opaque,
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url: url
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});
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};
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goog.inherits(ol.source.Stamen, ol.source.XYZ);
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