New minimumSymbolizer object on Renderer.Elements, which defines only those properties that are needed to ensure that nothing breaks. r=tschaub (closes #1345)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@6317 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Renderer/Elements.js

@@ -41,6 +41,17 @@ OpenLayers.Renderer.Elements = OpenLayers.Class(OpenLayers.Renderer, {
      */    
     xmlns: null,
     
+    /**
+     * Property: minimumSymbolizer
+     * {Object}
+     */
+    minimumSymbolizer: {
+        strokeLinecap: "round",
+        strokeOpacity: 1,
+        fillOpacity: 1,
+        pointRadius: 0
+    },
+    
     /**
      * Constructor: OpenLayers.Renderer.Elements
      * 
@@ -161,6 +172,7 @@ OpenLayers.Renderer.Elements = OpenLayers.Class(OpenLayers.Renderer, {
      */
     drawGeometryNode: function(node, geometry, style) {
         style = style || node._style;
+        OpenLayers.Util.applyDefaults(style, this.minimumSymbolizer);
 
         var options = {
             'isFilled': true,

lib/OpenLayers/Renderer/VML.js

@@ -197,10 +197,7 @@ OpenLayers.Renderer.VML = OpenLayers.Class(OpenLayers.Renderer.Elements, {
             if (!fill) {
                 fill = this.createNode('v:fill', node.id + "_fill");
             }
-
+            fill.setAttribute("opacity", style.fillOpacity);
-            if (style.fillOpacity) {
-                fill.setAttribute("opacity", style.fillOpacity);
-            }
 
             if (node._geometryClass == "OpenLayers.Geometry.Point" &&
                     style.externalGraphic) {
@@ -242,9 +239,7 @@ OpenLayers.Renderer.VML = OpenLayers.Class(OpenLayers.Renderer.Elements, {
                 stroke = this.createNode('v:stroke', node.id + "_stroke");
                 node.appendChild(stroke);
             }
-            if (style.strokeOpacity) {
+            stroke.setAttribute("opacity", style.strokeOpacity);
-                stroke.setAttribute("opacity", style.strokeOpacity);
-            }
             stroke.setAttribute("endcap", !style.strokeLinecap || style.strokeLinecap == 'butt' ? 'flat' : style.strokeLinecap);
         }
         
@@ -410,9 +405,6 @@ OpenLayers.Renderer.VML = OpenLayers.Class(OpenLayers.Renderer.Elements, {
      * radius - {float}
      */
     drawCircle: function(node, geometry, radius) {
-        if (typeof radius == "undefined") {
-            radius = 0;
-        }
         if(!isNaN(geometry.x)&& !isNaN(geometry.y)) {
             var resolution = this.getResolution();