"New permalink code maintains existing parameters ... including the

lat/lon/zoom/layers." Reported by bobkare (thx, bobkare!) with a patch by same,
rewritten by Schuyler, reviewed by me -- and I'm committing because Schuyler's
whitespace was bad. (RC1, here we come!)


git-svn-id: http://svn.openlayers.org/trunk/openlayers@4345 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Control/Permalink.js

@@ -109,37 +109,30 @@ OpenLayers.Control.Permalink = OpenLayers.Class(OpenLayers.Control, {
         if (!center) { 
             return; 
         }
-        
-        var zoom = "zoom=" + this.map.getZoom(); 
-        var lat = "lat=" + Math.round(center.lat*100000)/100000;
-        var lon = "lon=" + Math.round(center.lon*100000)/100000;
 
-        var layers = "layers=";
+        var params = OpenLayers.Util.getParameters(this.base);
+        
+        params.zoom = this.map.getZoom(); 
+        params.lat = Math.round(center.lat*100000)/100000;
+        params.lon = Math.round(center.lon*100000)/100000;
+
+        params.layers = '';
         for(var i=0; i< this.map.layers.length; i++) {
             var layer = this.map.layers[i];
 
             if (layer.isBaseLayer) {
-                layers += (layer == this.map.baseLayer) ? "B" : "0";
+                params.layers += (layer == this.map.baseLayer) ? "B" : "0";
             } else {
-                layers += (layer.getVisibility()) ? "T" : "F";           
+                params.layers += (layer.getVisibility()) ? "T" : "F";           
             }
         }
-        
+
         var href = this.base;
-        var paramsString =  lat + "&" + lon + "&" + zoom + "&" + layers; 
+        if( href.indexOf('?') != -1 ){
-        
+            href = href.substring( 0, href.indexOf('?') );
-        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;
-            }
         }
+
+        href += '?' + OpenLayers.Util.getParameterString(params);
         this.element.href = href;
     }, 
 

tests/Control/test_Permalink.html

@@ -39,11 +39,11 @@
         if (!map.getCenter())  map.zoomToMaxExtent();
         map.addControl(control);
         map.pan(5, 0);
-        t.ok(OpenLayers.Util.isEquivalentUrl(OpenLayers.Util.getElement('permalink').href, location+"?lat=0&lon=1.75781&zoom=2&layers=BT"), 'pan sets permalink');
+        t.ok(OpenLayers.Util.isEquivalentUrl(OpenLayers.Util.getElement('permalink').href, location+"?zoom=2&lat=0&lon=1.75781&layers=BT"), 'pan sets permalink');
         
         map.layers[1].setVisibility(false);
         
-        t.ok(OpenLayers.Util.isEquivalentUrl(OpenLayers.Util.getElement('permalink').href, location+"?lat=0&lon=1.75781&zoom=2&layers=BF"), 'setVisibility sets permalink');
+        t.ok(OpenLayers.Util.isEquivalentUrl(OpenLayers.Util.getElement('permalink').href, location+"?zoom=2&lat=0&lon=1.75781&layers=BF"), 'setVisibility sets permalink');
     }
     function test_03_Control_Permalink_updateLinksBase (t) {
         t.plan( 2 );
@@ -56,7 +56,7 @@
         if (!map.getCenter())  map.zoomToMaxExtent();
         map.addControl(control);
         map.pan(5, 0);
-        OpenLayers.Util.getElement('edit_permalink').href = './edit.html?lat=0&lon=1.75781&zoom=2&layers=B';
+        OpenLayers.Util.getElement('edit_permalink').href = './edit.html?zoom=2&lat=0&lon=1.75781&layers=B';
         t.eq(OpenLayers.Util.getElement('permalink').href, OpenLayers.Util.getElement('edit_permalink').href, "Panning sets permalink with base");
   }
   function test_04_Control_Permalink_noElement (t) {
@@ -77,7 +77,7 @@
       if (!map.getCenter())  map.zoomToMaxExtent();
       map.addControl(control);
       map.pan(5, 0);
-      OpenLayers.Util.getElement('edit_permalink').href = './edit.html?foo=bar&lat=0&lon=1.75781&zoom=2&layers=B';
+      OpenLayers.Util.getElement('edit_permalink').href = './edit.html?foo=bar&zoom=2&lat=0&lon=1.75781&layers=B';
       t.eq(OpenLayers.Util.getElement('permalink').href, OpenLayers.Util.getElement('edit_permalink').href, "Panning sets permalink with base and querystring");
       
       control = new OpenLayers.Control.Permalink('permalink', "./edit.html?foo=bar&" );
@@ -86,7 +86,7 @@
       t.eq(OpenLayers.Util.getElement('permalink').href, OpenLayers.Util.getElement('edit_permalink').href, "Panning sets permalink with base and querystring ending with '&'");
       
       control = new OpenLayers.Control.Permalink('permalink', "./edit.html?" );
-      OpenLayers.Util.getElement('edit_permalink').href = './edit.html?lat=0&lon=1.75781&zoom=2&layers=B';
+      OpenLayers.Util.getElement('edit_permalink').href = './edit.html?zoom=2&lat=0&lon=1.75781&layers=B';
       map.addControl(control);
       map.pan(5, 0);
       map.pan(-5, 0);
@@ -94,6 +94,20 @@
 
   }
 
+    function test_06_Control_Permalink_nonRepeating (t) {
+        t.plan( 2 );
+    
+        control = new OpenLayers.Control.Permalink('permalink', "./edit.html?zoom=3" );
+        t.ok( control instanceof OpenLayers.Control.Permalink, "new OpenLayers.Control returns object" );
+        map = new OpenLayers.Map('map');
+        layer = new OpenLayers.Layer.WMS('Test Layer', "http://octo.metacarta.com/cgi-bin/mapserv", {map: '/mapdata/vmap_wms.map', layers: 'basic', format: 'image/jpeg'});
+        map.addLayer(layer);
+        if (!map.getCenter())  map.zoomToMaxExtent();
+        map.addControl(control);
+        map.pan(5, 0);
+        OpenLayers.Util.getElement('edit_permalink').href = './edit.html?zoom=2&lat=0&lon=1.75781&layers=B';
+        t.eq(OpenLayers.Util.getElement('permalink').href, OpenLayers.Util.getElement('edit_permalink').href, "Panning sets permalink with existing zoom in base");
+  }
   </script>
 </head>
 <body>