1 /*
   2 function embedded_svg_edit(frame){
   3   //initialize communication
   4   this.frame = frame;
   5   this.stack = []; //callback stack
   6   
   7   var editapi = this;
   8   
   9   window.addEventListener("message", function(e){
  10     if(e.data.substr(0,5) == "ERROR"){
  11       editapi.stack.splice(0,1)[0](e.data,"error")
  12     }else{
  13       editapi.stack.splice(0,1)[0](e.data)
  14     }
  15   }, false)
  16 }
  17 
  18 embedded_svg_edit.prototype.call = function(code, callback){
  19   this.stack.push(callback);
  20   this.frame.contentWindow.postMessage(code,"*");
  21 }
  22 
  23 embedded_svg_edit.prototype.getSvgString = function(callback){
  24   this.call("svgCanvas.getSvgString()",callback)
  25 }
  26 
  27 embedded_svg_edit.prototype.setSvgString = function(svg){
  28   this.call("svgCanvas.setSvgString('"+svg.replace(/'/g, "\\'")+"')");
  29 }
  30 */
  31 
  32 
  33 /*
  34 Embedded SVG-edit API
  35 
  36 General usage:
  37 - Have an iframe somewhere pointing to a version of svg-edit > r1000
  38 - Initialize the magic with:
  39 var svgCanvas = new embedded_svg_edit(window.frames['svgedit']);
  40 - Pass functions in this format:
  41 svgCanvas.setSvgString("string")
  42 - Or if a callback is needed:
  43 svgCanvas.setSvgString("string")(function(data, error){
  44   if(error){
  45     //there was an error
  46   }else{
  47     //handle data
  48   }
  49 })
  50 
  51 Everything is done with the same API as the real svg-edit, 
  52 and all documentation is unchanged. The only difference is
  53 when handling returns, the callback notation is used instead. 
  54 
  55 var blah = new embedded_svg_edit(window.frames['svgedit']);
  56 blah.clearSelection("woot","blah",1337,[1,2,3,4,5,"moo"],-42,{a: "tree",b:6, c: 9})(function(){console.log("GET DATA",arguments)})
  57 */
  58 
  59 function embedded_svg_edit(frame){
  60   //initialize communication
  61   this.frame = frame;
  62   //this.stack = [] //callback stack
  63   this.callbacks = {}; //successor to stack
  64   this.encode = embedded_svg_edit.encode;
  65   //List of functions extracted with this:
  66   //Run in firebug on http://svg-edit.googlecode.com/svn/trunk/docs/files/svgcanvas-js.html
  67   
  68   //for(var i=0,q=[],f = document.querySelectorAll("div.CFunction h3.CTitle a");i<f.length;i++){q.push(f[i].name)};q
  69   //var functions = ["clearSelection", "addToSelection", "removeFromSelection", "open", "save", "getSvgString", "setSvgString", "createLayer", "deleteCurrentLayer", "getNumLayers", "getLayer", "getCurrentLayer", "setCurrentLayer", "renameCurrentLayer", "setCurrentLayerPosition", "getLayerVisibility", "setLayerVisibility", "moveSelectedToLayer", "getLayerOpacity", "setLayerOpacity", "clear"];
  70   
  71   
  72   //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
  73   //var l=[];for(var i in svgCanvas){if(typeof svgCanvas[i] == "function"){l.push(i)}};
  74   //run in svgedit itself
  75   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"]
  76   
  77   //TODO: rewrite the following, it's pretty scary.
  78   for(var i = 0; i < functions.length; i++){
  79     this[functions[i]] = (function(d){
  80       return function(){
  81         var t = this //new callback
  82         for(var g = 0, args = []; g < arguments.length; g++){
  83           args.push(arguments[g]);
  84         }
  85         var cbid = t.send(d,args, function(){})  //the callback (currently it's nothing, but will be set later
  86         
  87         return function(newcallback){
  88           t.callbacks[cbid] = newcallback; //set callback
  89         }
  90       }
  91     })(functions[i])
  92   }
  93   //TODO: use AddEvent for Trident browsers, currently they dont support SVG, but they do support onmessage
  94   var t = this;
  95   window.addEventListener("message", function(e){
  96     if(e.data.substr(0,4)=="SVGe"){ //because svg-edit is too longish
  97       var data = e.data.substr(4);
  98       var cbid = data.substr(0, data.indexOf(";"));
  99       if(t.callbacks[cbid]){
 100         if(data.substr(0,6) != "error:"){
 101           t.callbacks[cbid](eval("("+data.substr(cbid.length+1)+")"))
 102         }else{
 103           t.callbacks[cbid](data, "error");
 104         }
 105       }
 106     }
 107     //this.stack.shift()[0](e.data,e.data.substr(0,5) == "ERROR"?'error':null) //replace with shift
 108   }, false)
 109 }
 110 
 111 embedded_svg_edit.encode = function(obj){
 112   //simple partial JSON encoder implementation
 113   if(window.JSON && JSON.stringify) return JSON.stringify(obj);
 114   var enc = arguments.callee; //for purposes of recursion
 115   
 116   if(typeof obj == "boolean" || typeof obj == "number"){
 117       return obj+'' //should work...
 118   }else if(typeof obj == "string"){
 119     //a large portion of this is stolen from Douglas Crockford's json2.js
 120     return '"'+
 121           obj.replace(
 122             /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g
 123           , function (a) {
 124             return '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
 125           })
 126           +'"'; //note that this isn't quite as purtyful as the usualness
 127   }else if(obj.length){ //simple hackish test for arrayish-ness
 128     for(var i = 0; i < obj.length; i++){
 129       obj[i] = enc(obj[i]); //encode every sub-thingy on top
 130     }
 131     return "["+obj.join(",")+"]";
 132   }else{
 133     var pairs = []; //pairs will be stored here
 134     for(var k in obj){ //loop through thingys
 135       pairs.push(enc(k)+":"+enc(obj[k])); //key: value
 136     }
 137     return "{"+pairs.join(",")+"}" //wrap in the braces
 138   }
 139 }
 140 
 141 embedded_svg_edit.prototype.send = function(name, args, callback){
 142   var cbid = Math.floor(Math.random()*31776352877+993577).toString();
 143   //this.stack.push(callback);
 144   this.callbacks[cbid] = callback;
 145   for(var argstr = [], i = 0; i < args.length; i++){
 146     argstr.push(this.encode(args[i]))
 147   }
 148   var t = this;
 149   setTimeout(function(){//delay for the callback to be set in case its synchronous
 150     t.frame.contentWindow.postMessage(cbid+";svgCanvas['"+name+"']("+argstr.join(",")+")","*");
 151   }, 0);
 152   return cbid;
 153   //this.stack.shift()("svgCanvas['"+name+"']("+argstr.join(",")+")")
 154 }