From db5df84bcc72564c25d676668950214df78490da Mon Sep 17 00:00:00 2001
From: Kevin Kwok <Antimatter15@gmail.com>
Date: Sun, 22 Nov 2009 20:13:06 +0000
Subject: [PATCH] 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/embedapi.js   | 126 +++++++++++++++++++++++++++++++++++++++++++
 editor/svg-editor.js |  33 +++++++++++-
 2 files changed, 157 insertions(+), 2 deletions(-)
 create mode 100644 editor/embedapi.js

diff --git a/editor/embedapi.js b/editor/embedapi.js
new file mode 100644
index 00000000..457b5d97
--- /dev/null
+++ b/editor/embedapi.js
@@ -0,0 +1,126 @@
+/*
+Embedded SVG-edit API
+
+General usage:
+- Have an iframe somewhere pointing to a version of svg-edit > r1000
+- Initialize the magic with:
+var svgCanvas = new embedded_svg_edit(window.frames['svgedit']);
+- Pass functions in this format:
+svgCanvas.setSvgString("string")
+- Or if a callback is needed:
+svgCanvas.setSvgString("string")(function(data, error){
+  if(error){
+    //there was an error
+  }else{
+    //handle data
+  }
+})
+
+Everything is done with the same API as the real svg-edit, 
+and all documentation is unchanged. The only difference is
+when handling returns, the callback notation is used instead. 
+
+var blah = new embedded_svg_edit(window.frames['svgedit']);
+blah.clearSelection("woot","blah",1337,[1,2,3,4,5,"moo"],-42,{a: "tree",b:6, c: 9})(function(){console.log("GET DATA",arguments)})
+*/
+
+function embedded_svg_edit(frame){
+  //initialize communication
+  this.frame = frame;
+  //this.stack = [] //callback stack
+  this.callbacks = {}; //successor to stack
+  this.encode = embedded_svg_edit.encode;
+  //List of functions extracted with this:
+  //Run in firebug on http://svg-edit.googlecode.com/svn/trunk/docs/files/svgcanvas-js.html
+  
+  //for(var i=0,q=[],f = document.querySelectorAll("div.CFunction h3.CTitle a");i<f.length;i++){q.push(f[i].name)};q
+  //var functions = ["clearSelection", "addToSelection", "removeFromSelection", "open", "save", "getSvgString", "setSvgString", "createLayer", "deleteCurrentLayer", "getNumLayers", "getLayer", "getCurrentLayer", "setCurrentLayer", "renameCurrentLayer", "setCurrentLayerPosition", "getLayerVisibility", "setLayerVisibility", "moveSelectedToLayer", "getLayerOpacity", "setLayerOpacity", "clear"];
+  
+  
+  //Newer, well, it extracts things that aren't documented as well. All functions accessible through the normal thingy can now be accessed though the API
+  //var l=[];for(var i in svgCanvas){if(typeof svgCanvas[i] == "function"){l.push(i)}};
+  //run in svgedit itself
+  var functions = ["updateElementFromJson", "embedImage", "fixOperaXML", "clearSelection", "addToSelection", "removeFromSelection", "addNodeToSelection", "open", "save", "getSvgString", "setSvgString", "createLayer", "deleteCurrentLayer", "getNumLayers", "getLayer", "getCurrentLayer", "setCurrentLayer", "renameCurrentLayer", "setCurrentLayerPosition", "getLayerVisibility", "setLayerVisibility", "moveSelectedToLayer", "getLayerOpacity", "setLayerOpacity", "clear", "clearPath", "getNodePoint", "clonePathNode", "deletePathNode", "getResolution", "getImageTitle", "setImageTitle", "setResolution", "setBBoxZoom", "setZoom", "getMode", "setMode", "getStrokeColor", "setStrokeColor", "getFillColor", "setFillColor", "setStrokePaint", "setFillPaint", "getStrokeWidth", "setStrokeWidth", "getStrokeStyle", "setStrokeStyle", "getOpacity", "setOpacity", "getFillOpacity", "setFillOpacity", "getStrokeOpacity", "setStrokeOpacity", "getTransformList", "getBBox", "getRotationAngle", "setRotationAngle", "each", "bind", "setIdPrefix", "getBold", "setBold", "getItalic", "setItalic", "getFontFamily", "setFontFamily", "getFontSize", "setFontSize", "getText", "setTextContent", "setImageURL", "setRectRadius", "setSegType", "quickClone", "beginUndoableChange", "changeSelectedAttributeNoUndo", "finishUndoableChange", "changeSelectedAttribute", "deleteSelectedElements", "groupSelectedElements", "ungroupSelectedElement", "moveToTopSelectedElement", "moveToBottomSelectedElement", "moveSelectedElements", "getStrokedBBox", "getVisibleElements", "cycleElement", "getUndoStackSize", "getRedoStackSize", "getNextUndoCommandText", "getNextRedoCommandText", "undo", "redo", "cloneSelectedElements", "alignSelectedElements", "getZoom", "getVersion", "setIconSize", "setLang", "setCustomHandlers"]
+  
+  //TODO: rewrite the following, it's pretty scary.
+  for(var i = 0; i < functions.length; i++){
+    this[functions[i]] = (function(d){
+      return function(){
+        var cbk = function(){}, t = this //new callback
+        for(var g = 0, args = []; g < arguments.length; g++){
+          args.push(arguments[g]);
+        }
+        setTimeout(function(){//delay for the callback to be set in case its synchronous
+          t.send(d, //the name of the function 
+                  args, //the arguments to the function
+                  function(r){
+                    cbk(r); //the callback (currently it's nothing, but will be set later
+                  })
+        },0)
+        return function(newcallback){
+          cbk = newcallback;
+        }
+      }
+    })(functions[i])
+  }
+  //TODO: use AddEvent for Trident browsers, currently they dont support SVG, but they do support onmessage
+  var t = this;
+  window.addEventListener("message", function(e){
+    if(e.data.substr(0,4)=="SVGe"){ //because svg-edit is too longish
+      var data = e.data.substr(4);
+      var cbid = parseInt(data.substr(0, data.indexOf(";")));
+      if(t.callbacks[cbid]){
+        if(data.substr(0,6) != "error:"){
+          t.callbacks[cbid](eval("("+data+")"))
+        }else{
+          t.callbacks[cbid](data, "error");
+        }
+      }
+    }
+    //this.stack.shift()[0](e.data,e.data.substr(0,5) == "ERROR"?'error':null) //replace with shift
+  }, false)
+}
+
+embedded_svg_edit.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
+  }
+}
+
+embedded_svg_edit.prototype.send = function(name, args, callback){
+  var cbid = Math.floor(Math.random()*31776352877+993577).toString();
+  //this.stack.push(callback);
+  this.callbacks[cbid] = callback;
+  for(var argstr = [], i = 0; i < args.length; i++){
+    argstr.push(this.encode(args[i]))
+  }
+  this.frame.contentWindow.postMessage(cbid+";svgCanvas['"+name+"']("+argstr.join(",")+")");
+  //this.stack.shift()("svgCanvas['"+name+"']("+argstr.join(",")+")")
+}
+
+
+
diff --git a/editor/svg-editor.js b/editor/svg-editor.js
index 1a79f659..a714784d 100644
--- a/editor/svg-editor.js
+++ b/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){}