(Closes #730) These changes make the permalink smarter in the case where we

already have some URL args in the URL. Thanks to penyaskito for the bug 
report.


git-svn-id: http://svn.openlayers.org/trunk/openlayers@4047 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/Permalink.js

@@ -35,9 +35,7 @@ OpenLayers.Control.Permalink = OpenLayers.Class(OpenLayers.Control, {
     initialize: function(element, base) {
         OpenLayers.Control.prototype.initialize.apply(this, arguments);
         this.element = OpenLayers.Util.getElement(element);        
-        if (base) {
-            this.base = base;
-        }
+        this.base = base || document.location.href;
     },
 
     /**
@@ -116,8 +114,22 @@ OpenLayers.Control.Permalink = OpenLayers.Class(OpenLayers.Control, {
                 layers += (layer.getVisibility()) ? "T" : "F";           
             }
         }
-        var href = this.base + "?" + lat + "&" + lon + "&" + zoom + 
-                                   "&" + layers; 
+        
+        var href = this.base;
+        var paramsString =  lat + "&" + lon + "&" + zoom + "&" + layers; 
+        
+        var lastServerChar = href.charAt(href.length - 1);
+        if ((lastServerChar == "&") || (lastServerChar == "?")) {
+            href += paramsString;
+        } else {
+            if (href.indexOf('?') == -1) {
+                //serverPath has no ? -- add one
+                href += '?' + paramsString;
+            } else {
+                //serverPath contains ?, so must already have paramsString at the end
+                href += '&' + paramsString;
+            }
+        }
         this.element.href = href;
     },