Embed communication protocol updated, embed api file added

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@966 eee81c28-f429-11dd-99c0-75d572ba1ddd

editor/svg-editor.js

@@ -2238,11 +2238,40 @@ $(function() {
 	put_locale(svgCanvas);
 	
 	try{
+	    json_encode = function(obj){
+      //simple partial JSON encoder implementation
+      if(window.JSON && JSON.stringify) return JSON.stringify(obj);
+      var enc = arguments.callee; //for purposes of recursion
+      if(typeof obj == "boolean" || typeof obj == "number"){
+          return obj+'' //should work...
+      }else if(typeof obj == "string"){
+        //a large portion of this is stolen from Douglas Crockford's json2.js
+        return '"'+
+              obj.replace(
+                /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g
+              , function (a) {
+                return '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
+              })
+              +'"'; //note that this isn't quite as purtyful as the usualness
+      }else if(obj.length){ //simple hackish test for arrayish-ness
+        for(var i = 0; i < obj.length; i++){
+          obj[i] = enc(obj[i]); //encode every sub-thingy on top
+        }
+        return "["+obj.join(",")+"]";
+      }else{
+        var pairs = []; //pairs will be stored here
+        for(var k in obj){ //loop through thingys
+          pairs.push(enc(k)+":"+enc(obj[k])); //key: value
+        }
+        return "{"+pairs.join(",")+"}" //wrap in the braces
+      }
+    }
 	  window.addEventListener("message", function(e){
+	    var cbid = parseInt(e.data.substr(0, e.data.indexOf(";")));
 	    try{
-        e.source.postMessage(eval(e.data), e.origin);
+        e.source.postMessage("SVGe"+cbid+";"+json_encode(eval(e.data)), e.origin);
       }catch(err){
-        e.source.postMessage("error:"+err.message, e.origin);
+        e.source.postMessage("SVGe"+cbid+";error:"+err.message, e.origin);
       }
     }, false)
 	}catch(err){}