Add link support for source logos

src/ol/renderer/layerrenderer.js

@@ -1,6 +1,7 @@
 goog.provide('ol.renderer.Layer');
 
 goog.require('goog.Disposable');
+goog.require('goog.asserts');
 goog.require('ol.ImageState');
 goog.require('ol.TileRange');
 goog.require('ol.TileState');
@@ -160,7 +161,13 @@ ol.renderer.Layer.prototype.updateAttributions =
 ol.renderer.Layer.prototype.updateLogos = function(frameState, source) {
   var logo = source.getLogo();
   if (goog.isDef(logo)) {
-    frameState.logos[logo] = '';
+    if (goog.isString(logo)) {
+      frameState.logos[logo] = '';
+    } else if (goog.isObject(logo)) {
+      goog.asserts.assertString(logo.href);
+      goog.asserts.assertString(logo.src);
+      frameState.logos[logo.src] = logo.href;
+    }
   }
 };
 

src/ol/source/imagesource.js

@@ -11,7 +11,7 @@ goog.require('ol.source.Source');
 /**
  * @typedef {{attributions: (Array.<ol.Attribution>|undefined),
  *            extent: (null|ol.Extent|undefined),
- *            logo: (string|undefined),
+ *            logo: (string|Object|undefined),
  *            projection: ol.proj.ProjectionLike,
  *            resolutions: (Array.<number>|undefined),
  *            state: (ol.source.State|string|undefined)}}

src/ol/source/source.js

@@ -23,7 +23,7 @@ ol.source.State = {
 /**
  * @typedef {{attributions: (Array.<ol.Attribution>|undefined),
  *            extent: (ol.Extent|undefined),
- *            logo: (string|undefined),
+ *            logo: (string|Object|undefined),
  *            projection: ol.proj.ProjectionLike,
  *            state: (ol.source.State|string|undefined)}}
  */
@@ -69,7 +69,7 @@ ol.source.Source = function(options) {
 
   /**
    * @private
-   * @type {string|undefined}
+   * @type {string|Object|undefined}
    */
   this.logo_ = options.logo;
 
@@ -115,7 +115,7 @@ ol.source.Source.prototype.getExtent = function() {
 
 
 /**
- * @return {string|undefined} Logo.
+ * @return {string|Object|undefined} Logo.
  */
 ol.source.Source.prototype.getLogo = function() {
   return this.logo_;
@@ -162,7 +162,7 @@ ol.source.Source.prototype.setExtent = function(extent) {
 
 
 /**
- * @param {string|undefined} logo Logo.
+ * @param {string|Object|undefined} logo Logo.
  */
 ol.source.Source.prototype.setLogo = function(logo) {
   this.logo_ = logo;

src/ol/source/tilesource.js

@@ -13,7 +13,7 @@ goog.require('ol.tilegrid.TileGrid');
 /**
  * @typedef {{attributions: (Array.<ol.Attribution>|undefined),
  *            extent: (ol.Extent|undefined),
- *            logo: (string|undefined),
+ *            logo: (string|Object|undefined),
  *            opaque: (boolean|undefined),
  *            tilePixelRatio: (number|undefined),
  *            projection: ol.proj.ProjectionLike,