Add Stamen maps support

src/ol/tile/stamen.js

@@ -0,0 +1,92 @@
+// FIXME Configure minZoom when supported by TileGrid
+
+goog.provide('ol.layer.Stamen');
+goog.provide('ol.store.Stamen');
+
+goog.require('ol.TileUrlFunction');
+goog.require('ol.layer.XYZ');
+
+
+/**
+ * @enum {string}
+ */
+ol.StamenProvider = {
+  TERRAIN: 'terrain',
+  TONER: 'toner',
+  WATERCOLOR: 'watercolor'
+};
+
+
+/**
+ * @enum {string}
+ */
+ol.StamenFlavor = {
+  TERRAIN_BACKGROUND: 'background',
+  TERRAIN_LABELS: 'labels',
+  TERRAIN_LINES: 'lines',
+  TONER_2010: '2010',
+  TONER_2011: '2011',
+  TONER_2011_LABELS: '2011-labels',
+  TONER_2011_LINES: '2011-lines',
+  TONER_2011_LITE: '2011-lite',
+  TONER_BACKGROUND: 'background',
+  TONER_HYBRID: 'hybrid',
+  TONER_LABELS: 'labels',
+  TONER_LINES: 'lines',
+  TONER_LITE: 'lite'
+};
+
+
+/**
+ * @type {Object.<ol.StamenProvider,
+ *                {type: string, minZoom: number, maxZoom: number}>}
+ */
+ol.StamenProviderConfig = {};
+ol.StamenProviderConfig[ol.StamenProvider.TERRAIN] = {
+  type: 'jpg',
+  minZoom: 4,
+  maxZoom: 18
+};
+ol.StamenProviderConfig[ol.StamenProvider.TONER] = {
+  type: 'png',
+  minZoom: 0,
+  maxZoom: 20
+};
+ol.StamenProviderConfig[ol.StamenProvider.WATERCOLOR] = {
+  type: 'jpg',
+  minZoom: 3,
+  maxZoom: 16
+};
+
+
+
+/**
+ * @constructor
+ * @extends {ol.layer.XYZ}
+ * @param {ol.StamenProvider} provider Provider.
+ * @param {ol.StamenFlavor=} opt_flavor Flavor.
+ * @param {Object.<string, *>=} opt_values Values.
+ */
+ol.layer.Stamen = function(provider, opt_flavor, opt_values) {
+
+  var config = ol.StamenProviderConfig[provider];
+
+  var layer = provider;
+  if (goog.isDef(opt_flavor)) {
+    layer += '-' + opt_flavor;
+  }
+  var tileUrlFunction = ol.TileUrlFunction.createFromTemplate(
+      'http://{a-d}.tile.stamen.com/' + layer + '/{z}/{x}/{y}.' + config.type);
+
+  var attribution = new ol.Attribution(
+      'Map tiles by <a href="http://stamen.com">Stamen Design</a>, ' +
+      'under ' +
+      '<a href="http://creativecommons.org/licenses/by/3.0">CC BY 3.0</a>. ' +
+      'Data by <a href="http://openstreetmap.org">OpenStreetMap</a>, ' +
+      'under ' +
+      '<a href="http://creativecommons.org/licenses/by-sa/3.0">CC BY SA</a>.');
+
+  goog.base(this, config.maxZoom, tileUrlFunction, [attribution]);
+
+};
+goog.inherits(ol.layer.Stamen, ol.layer.XYZ);