Add optional URL for logos

src/ol/control/logocontrol.js

@@ -90,15 +90,25 @@ ol.control.Logo.prototype.updateElement_ = function(frameState) {
     }
   }
 
-  var image, logoElement;
-  for (logo in logos) {
-    if (!(logo in logoElements)) {
+  var image, logoElement, logoKey;
+  for (logoKey in logos) {
+    if (!(logoKey in logoElements)) {
       image = new Image();
-      image.src = logo;
-      logoElement = goog.dom.createElement(goog.dom.TagName.LI);
-      logoElement.appendChild(image);
+      image.src = logoKey;
+      var logoValue = logos[logoKey];
+      var child;
+      if (logoValue === '') {
+        child = image;
+      } else {
+        child = goog.dom.createDom(goog.dom.TagName.A, {
+          'href': logoValue,
+          'target': '_blank'
+        });
+        child.appendChild(image);
+      }
+      logoElement = goog.dom.createDom(goog.dom.TagName.LI, undefined, child);
       goog.dom.appendChild(this.ulElement_, logoElement);
-      logoElements[logo] = logoElement;
+      logoElements[logoKey] = logoElement;
     }
   }
 

src/ol/framestate.js

@@ -25,7 +25,7 @@ goog.require('ol.layer.LayerState');
  *            index: number,
  *            layersArray: Array.<ol.layer.Layer>,
  *            layerStates: Object.<number, ol.layer.LayerState>,
- *            logos: Object.<string, boolean>,
+ *            logos: Object.<string, string>,
  *            pixelToCoordinateMatrix: goog.vec.Mat4.Number,
  *            postRenderFunctions: Array.<ol.PostRenderFunction>,
  *            size: ol.Size,

src/ol/renderer/layerrenderer.js

@@ -175,7 +175,7 @@ ol.renderer.Layer.prototype.updateAttributions =
 ol.renderer.Layer.prototype.updateLogos = function(frameState, source) {
   var logo = source.getLogo();
   if (goog.isDef(logo)) {
-    frameState.logos[logo] = true;
+    frameState.logos[logo] = '';
   }
 };