Add OpenStreetMap options

src/objectliterals.exports

@@ -150,6 +150,12 @@
 @exportObjectLiteralProperty ol.source.DebugTileSourceOptions.projection ol.ProjectionLike
 @exportObjectLiteralProperty ol.source.DebugTileSourceOptions.tileGrid ol.tilegrid.TileGrid|undefined
 
+@exportObjectLiteral ol.source.OpenStreetMapOptions
+@exportObjectLiteralProperty ol.source.OpenStreetMapOptions.attribution ol.Attribution|undefined
+@exportObjectLiteralProperty ol.source.OpenStreetMapOptions.attributions Array.<ol.Attribution>|undefined
+@exportObjectLiteralProperty ol.source.OpenStreetMapOptions.maxZoom number|undefined
+@exportObjectLiteralProperty ol.source.OpenStreetMapOptions.url string|undefined
+
 @exportObjectLiteral ol.source.SingleImageWMSOptions
 @exportObjectLiteralProperty ol.source.SingleImageWMSOptions.attributions Array.<ol.Attribution>|undefined
 @exportObjectLiteralProperty ol.source.SingleImageWMSOptions.crossOrigin null|string|undefined

src/ol/source/openstreetmapsource.js

@@ -8,20 +8,39 @@ goog.require('ol.source.XYZ');
 /**
  * @constructor
  * @extends {ol.source.XYZ}
+ * @param {ol.source.OpenStreetMapOptions=} opt_options Open Street Map options.
  */
-ol.source.OpenStreetMap = function() {
+ol.source.OpenStreetMap = function(opt_options) {
 
-  var attribution = new ol.Attribution(
+  var options = goog.isDef(opt_options) ? opt_options : {};
-      '&copy; <a href="http://www.openstreetmap.org">OpenStreetMap</a> ' +
+
-      'contributors, ' +
+  var attributions;
-      '<a href="http://creativecommons.org/licenses/by-sa/2.0/">CC BY-SA</a>');
+  if (goog.isDef(options.attributions)) {
+    attributions = options.attributions;
+  } else if (goog.isDef(options.attribution)) {
+    attributions = [options.attribution];
+  } else {
+    attributions = [
+      new ol.Attribution(
+          '&copy; <a href="http://www.openstreetmap.org">OpenStreetMap</a> ' +
+          'contributors, ' +
+          '<a href="http://creativecommons.org/licenses/by-sa/2.0/"> ' +
+          'CC BY-SA' +
+          '</a>')
+    ];
+  }
+
+  var maxZoom = goog.isDef(options.maxZoom) ? options.maxZoom : 18;
+
+  var url = goog.isDef(options.url) ?
+      options.url : 'http://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png';
 
   goog.base(this, {
-    attributions: [attribution],
+    attributions: attributions,
     crossOrigin: 'anonymous',
     opaque: true,
-    maxZoom: 18,
+    maxZoom: maxZoom,
-    url: 'http://{a-c}.tile.openstreetmap.org/{z}/{x}/{y}.png'
+    url: url
   });
 
 };