Critical privacy/data integrity fix: Move cross-domain capable message listener into own extension (ext-xdomain-messaging.js) and do not include by default (the extension now won't work anyways without an allowedOrigins config first being set (in config.js) for security reasons (and not via URL)); add allowedOrigins config and demo use in config-sample.js; JSLint; update embedapi.html to supply the xdomain extension in case running xdomain (again, allowedOrigins must be supplied in the local copy of config.js for this to work); modify embedapi.js to allow reuse of cross-domain API with same-domain usage, but without the intermediate JSON parsing which could lose some non-JSONable arguments or response.
git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2714 eee81c28-f429-11dd-99c0-75d572ba1dddmaster
Brett Zamir
parent
bb75f34ec3
commit
1e2e6529d2
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@ -79,6 +79,13 @@ svgEditor.setConfig({
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// langPath: 'locale/',
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// extPath: 'extensions/',
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// jGraduatePath: 'jgraduate/images/',
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/*
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Uncomment the following to allow at least same domain (embedded) access,
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including file:// access.
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Setting as `['*']` would allow any domain to access but would be unsafe to
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data privacy and integrity.
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*/
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// allowedOrigins: [window.location.origin || 'null'], // May be 'null' (as a string) when used as a file:// URL
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// DOCUMENT PROPERTIES
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// dimensions: [640, 480],
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// EDITOR OPTIONS
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@ -7,11 +7,12 @@
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<script src="embedapi.js"></script>
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<script>
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/*globals $, EmbeddedSVGEdit*/
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var initEmbed;
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$(function () {'use strict';
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var svgCanvas = null;
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function initEmbed() {
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initEmbed = function () {
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var doc, mainButton,
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frame = document.getElementById('svgedit');
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svgCanvas = new EmbeddedSVGEdit(frame);
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@ -19,7 +20,7 @@
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doc = frame.contentDocument || frame.contentWindow.document;
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mainButton = doc.getElementById('main_button');
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mainButton.style.display = 'none';
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}
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};
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function handleSvgData(data, error) {
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if (error) {
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@ -30,7 +31,7 @@
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}
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function loadSvg() {
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var svgexample = '<svg width="640" height="480" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg"><g><title>Layer 1</title><rect stroke-width="5" stroke="#000000" fill="#FF0000" id="svg_1" height="35" width="51" y="35" x="32"/><ellipse ry="15" rx="24" stroke-width="5" stroke="#000000" fill="#0000ff" id="svg_2" cy="60" cx="66"/></g></svg>';
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var svgexample = '<svg width="640" height="480" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg"><g><title>Layer 1<\/title><rect stroke-width="5" stroke="#000000" fill="#FF0000" id="svg_1" height="35" width="51" y="35" x="32"/><ellipse ry="15" rx="24" stroke-width="5" stroke="#000000" fill="#0000ff" id="svg_2" cy="60" cx="66"/><\/g><\/svg>';
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svgCanvas.setSvgString(svgexample);
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}
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@ -41,16 +42,13 @@
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// Add event handlers
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$('#load').click(loadSvg);
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$('#save').click(saveSvg);
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// Export globals
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window.initEmbed = initEmbed;
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});
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});
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</script>
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</head>
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<body>
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<button id="load">Load example</button>
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<button id="save">Save data</button>
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<br/>
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<iframe src="svg-editor.html" width="900px" height="600px" id="svgedit" onload="initEmbed();"></iframe>
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<iframe src="svg-editor.html?extensions=ext-xdomain-messaging.js&storagePrompt=false" width="900px" height="600px" id="svgedit" onload="initEmbed();"></iframe>
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</body>
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</html>
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@ -6,9 +6,9 @@ General usage:
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- Initialize the magic with:
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var svgCanvas = new EmbeddedSVGEdit(window.frames.svgedit);
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- Pass functions in this format:
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svgCanvas.setSvgString("string")
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svgCanvas.setSvgString('string')
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- Or if a callback is needed:
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svgCanvas.setSvgString("string")(function(data, error){
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svgCanvas.setSvgString('string')(function(data, error){
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if (error){
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// There was an error
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} else{
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@ -22,7 +22,7 @@ and all documentation is unchanged.
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However, this file depends on the postMessage API which
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can only support JSON-serializable arguments and
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return values, so, for example, arguments whose value is
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"undefined", a function, a non-finite number, or a built-in
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'undefined', a function, a non-finite number, or a built-in
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object like Date(), RegExp(), etc. will most likely not behave
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as expected. In such a case one may need to host
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the SVG editor on the same domain and reference the
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@ -32,7 +32,7 @@ The only other difference is
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when handling returns: the callback notation is used instead.
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var blah = new EmbeddedSVGEdit(window.frames.svgedit);
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blah.clearSelection("woot","blah",1337,[1,2,3,4,5,"moo"],-42,{a: "tree",b:6, c: 9})(function(){console.log("GET DATA",arguments)})
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blah.clearSelection('woot', 'blah', 1337, [1, 2, 3, 4, 5, 'moo'], -42, {a: 'tree',b:6, c: 9})(function(){console.log('GET DATA',arguments)})
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*/
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(function () {'use strict';
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@ -40,7 +40,7 @@ blah.clearSelection("woot","blah",1337,[1,2,3,4,5,"moo"],-42,{a: "tree",b:6, c:
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var cbid = 0;
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function getCallbackSetter (d) {
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return function(){
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return function () {
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var t = this, // New callback
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args = [].slice.call(arguments),
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cbid = t.send(d, args, function(){}); // The callback (currently it's nothing, but will be set later)
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@ -51,8 +51,44 @@ function getCallbackSetter (d) {
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};
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}
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function EmbeddedSVGEdit(frame){
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if (!(this instanceof EmbeddedSVGEdit)) { // Allow invocation without "new" keyword
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/*
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* Having this separate from messageListener allows us to
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* avoid using JSON parsing (and its limitations) in the case
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* of same domain control
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*/
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function addCallback (t, data) {
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var result = data.result || data.error;
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cbid = data.id;
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if (t.callbacks[cbid]) {
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if (data.result) {
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t.callbacks[cbid](result);
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} else {
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t.callbacks[cbid](result, 'error');
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}
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}
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}
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function messageListener (e) {
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// We accept and post strings as opposed to objets for the sake of IE9 support; this
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// will most likely be changed in the future
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if (typeof e.data !== 'string') {
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return;
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}
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var data = e.data && JSON.parse(e.data);
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if (!data || typeof data !== 'object' || data.namespace !== 'svg-edit') {
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return;
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}
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addCallback(this, data);
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}
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function getMessageListener (t) {
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return function (e) {
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messageListener.call(t, e);
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};
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}
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function EmbeddedSVGEdit (frame) {
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if (!(this instanceof EmbeddedSVGEdit)) { // Allow invocation without 'new' keyword
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return new EmbeddedSVGEdit(frame);
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}
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// Initialize communication
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@ -61,71 +97,75 @@ function EmbeddedSVGEdit(frame){
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// List of functions extracted with this:
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// Run in firebug on http://svg-edit.googlecode.com/svn/trunk/docs/files/svgcanvas-js.html
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// for (var i=0,q=[],f = document.querySelectorAll("div.CFunction h3.CTitle a"); i < f.length; i++) { q.push(f[i].name); }; q
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// var functions = ["clearSelection", "addToSelection", "removeFromSelection", "open", "save", "getSvgString", "setSvgString",
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// "createLayer", "deleteCurrentLayer", "setCurrentLayer", "renameCurrentLayer", "setCurrentLayerPosition", "setLayerVisibility",
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// "moveSelectedToLayer", "clear"];
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// for (var i=0,q=[],f = document.querySelectorAll('div.CFunction h3.CTitle a'); i < f.length; i++) { q.push(f[i].name); }; q
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// var functions = ['clearSelection', 'addToSelection', 'removeFromSelection', 'open', 'save', 'getSvgString', 'setSvgString',
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// 'createLayer', 'deleteCurrentLayer', 'setCurrentLayer', 'renameCurrentLayer', 'setCurrentLayerPosition', 'setLayerVisibility',
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// 'moveSelectedToLayer', 'clear'];
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// 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
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// var l = []; for (var i in svgCanvas){ if (typeof svgCanvas[i] == "function") { l.push(i);} };
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// var l = []; for (var i in svgCanvas){ if (typeof svgCanvas[i] == 'function') { l.push(i);} };
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// Run in svgedit itself
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var i,
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t = this,
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functions = ["updateElementFromJson", "embedImage", "fixOperaXML", "clearSelection",
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"addToSelection",
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"removeFromSelection", "addNodeToSelection", "open", "save", "getSvgString", "setSvgString", "createLayer",
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"deleteCurrentLayer", "getCurrentDrawing", "setCurrentLayer", "renameCurrentLayer", "setCurrentLayerPosition",
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"setLayerVisibility", "moveSelectedToLayer", "clear", "clearPath", "getNodePoint", "clonePathNode", "deletePathNode",
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"getResolution", "getImageTitle", "setImageTitle", "setResolution", "setBBoxZoom", "setZoom", "getMode", "setMode",
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"getStrokeColor", "setStrokeColor", "getFillColor", "setFillColor", "setStrokePaint", "setFillPaint", "getStrokeWidth",
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"setStrokeWidth", "getStrokeStyle", "setStrokeStyle", "getOpacity", "setOpacity", "getFillOpacity", "setFillOpacity",
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"getStrokeOpacity", "setStrokeOpacity", "getTransformList", "getBBox", "getRotationAngle", "setRotationAngle", "each",
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"bind", "setIdPrefix", "getBold", "setBold", "getItalic", "setItalic", "getFontFamily", "setFontFamily", "getFontSize",
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"setFontSize", "getText", "setTextContent", "setImageURL", "setRectRadius", "setSegType", "quickClone",
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"changeSelectedAttributeNoUndo", "changeSelectedAttribute", "deleteSelectedElements", "groupSelectedElements", "zoomChanged",
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"ungroupSelectedElement", "moveToTopSelectedElement", "moveToBottomSelectedElement", "moveSelectedElements",
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"getStrokedBBox", "getVisibleElements", "cycleElement", "getUndoStackSize", "getRedoStackSize", "getNextUndoCommandText",
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"getNextRedoCommandText", "undo", "redo", "cloneSelectedElements", "alignSelectedElements", "getZoom", "getVersion",
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"setIconSize", "setLang", "setCustomHandlers"];
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functions = ['updateElementFromJson', 'embedImage', 'fixOperaXML', 'clearSelection',
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'addToSelection',
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'removeFromSelection', 'addNodeToSelection', 'open', 'save', 'getSvgString', 'setSvgString', 'createLayer',
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'deleteCurrentLayer', 'getCurrentDrawing', 'setCurrentLayer', 'renameCurrentLayer', 'setCurrentLayerPosition',
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'setLayerVisibility', 'moveSelectedToLayer', 'clear', 'clearPath', 'getNodePoint', 'clonePathNode', 'deletePathNode',
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'getResolution', 'getImageTitle', 'setImageTitle', 'setResolution', 'setBBoxZoom', 'setZoom', 'getMode', 'setMode',
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'getStrokeColor', 'setStrokeColor', 'getFillColor', 'setFillColor', 'setStrokePaint', 'setFillPaint', 'getStrokeWidth',
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'setStrokeWidth', 'getStrokeStyle', 'setStrokeStyle', 'getOpacity', 'setOpacity', 'getFillOpacity', 'setFillOpacity',
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'getStrokeOpacity', 'setStrokeOpacity', 'getTransformList', 'getBBox', 'getRotationAngle', 'setRotationAngle', 'each',
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'bind', 'setIdPrefix', 'getBold', 'setBold', 'getItalic', 'setItalic', 'getFontFamily', 'setFontFamily', 'getFontSize',
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'setFontSize', 'getText', 'setTextContent', 'setImageURL', 'setRectRadius', 'setSegType', 'quickClone',
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'changeSelectedAttributeNoUndo', 'changeSelectedAttribute', 'deleteSelectedElements', 'groupSelectedElements', 'zoomChanged',
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'ungroupSelectedElement', 'moveToTopSelectedElement', 'moveToBottomSelectedElement', 'moveSelectedElements',
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'getStrokedBBox', 'getVisibleElements', 'cycleElement', 'getUndoStackSize', 'getRedoStackSize', 'getNextUndoCommandText',
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'getNextRedoCommandText', 'undo', 'redo', 'cloneSelectedElements', 'alignSelectedElements', 'getZoom', 'getVersion',
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'setIconSize', 'setLang', 'setCustomHandlers'];
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// TODO: rewrite the following, it's pretty scary.
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for (i = 0; i < functions.length; i++) {
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this[functions[i]] = getCallbackSetter(functions[i]);
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}
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// Older IE may need a polyfill for addEventListener, but so it would for SVG
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window.addEventListener('message', function(e) {
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// We accept and post strings as opposed to objets for the sake of IE9 support; this
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// will most likely be changed in the future
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if (typeof e.data !== 'string') {
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return;
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}
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var result, cbid,
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data = e.data && JSON.parse(e.data);
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if (!data || typeof data !== 'object' || data.namespace !== 'svg-edit') {
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return;
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}
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result = data.result || data.error;
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cbid = data.id;
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if (t.callbacks[cbid]) {
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if (data.result) {
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t.callbacks[cbid](result);
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} else {
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t.callbacks[cbid](result, "error");
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}
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}
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}, false);
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window.addEventListener('message', getMessageListener(this), false);
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}
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EmbeddedSVGEdit.prototype.send = function(name, args, callback){
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EmbeddedSVGEdit.prototype.send = function (name, args, callback){
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var t = this;
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cbid++;
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this.callbacks[cbid] = callback;
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setTimeout(function(){ // Delay for the callback to be set in case its synchronous
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// Todo: Handle non-JSON arguments and return values (undefined, nonfinite numbers, functions, and built-in objects like Date, RegExp), etc.?
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setTimeout(function () { // Delay for the callback to be set in case its synchronous
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/*
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* Todo: Handle non-JSON arguments and return values (undefined,
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* nonfinite numbers, functions, and built-in objects like Date,
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* RegExp), etc.? Allow promises instead of callbacks? Review
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* SVG-Edit functions for whether JSON-able parameters can be
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* made compatile with all API functionality
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*/
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// We accept and post strings for the sake of IE9 support
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t.frame.contentWindow.postMessage(JSON.stringify({namespace: "svgCanvas", id: cbid, name: name, args: args}), '*');
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if (window.location.origin === t.frame.contentWindow.location.origin) {
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// Although we do not really need this API if we are working same
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// domain, it could allow us to write in a way that would work
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// cross-domain as well, assuming we stick to the argument limitations
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// of the current JSON-based communication API (e.g., not passing
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// callbacks). We might be able to address these shortcomings; see
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// the todo elsewhere in this file.
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var message = {id: cbid},
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svgCanvas = t.frame.contentWindow.svgCanvas;
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try {
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message.result = svgCanvas[name].apply(svgCanvas, args);
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}
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catch (err) {
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message.error = err.message;
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}
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addCallback(t, message);
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}
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else { // Requires the ext-xdomain-messaging.js extension
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t.frame.contentWindow.postMessage(JSON.stringify({namespace: 'svgCanvas', id: cbid, name: name, args: args}), '*');
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}
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}, 0);
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return cbid;
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};
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@ -0,0 +1,42 @@
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/**
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* Should not be needed for same domain control (just call via child frame),
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* but an API common for cross-domain and same domain use can be found
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* in embedapi.js with a demo at embedapi.html
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*/
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/*globals svgEditor, svgCanvas*/
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svgEditor.addExtension('xdomain-messaging', function() {'use strict';
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try {
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window.addEventListener('message', function(e) {
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// We accept and post strings for the sake of IE9 support
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if (typeof e.data !== 'string' || e.data.charAt() === '|') {
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return;
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}
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var cbid, name, args, message, allowedOrigins, data = JSON.parse(e.data);
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if (!data || typeof data !== 'object' || data.namespace !== 'svgCanvas') {
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return;
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}
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// The default is not to allow any origins, including even the same domain or if run on a file:// URL
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// See config-sample.js for an example of how to configure
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allowedOrigins = svgEditor.curConfig.allowedOrigins;
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if (allowedOrigins.indexOf('*') === -1 && allowedOrigins.indexOf(e.origin) === -1) {
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return;
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}
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cbid = data.id;
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name = data.name;
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args = data.args;
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message = {
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namespace: 'svg-edit',
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id: cbid
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};
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try {
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message.result = svgCanvas[name].apply(svgCanvas, args);
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} catch (err) {
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message.error = err.message;
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}
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e.source.postMessage(JSON.stringify(message), '*');
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}, false);
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}
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catch (err) {
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console.log('Error with xdomain message listener: ' + err);
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}
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});
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@ -68,7 +68,22 @@ TO-DOS
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curConfig = {
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// We do not put on defaultConfig to simplify object copying
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// procedures (we obtain instead from defaultExtensions)
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extensions: []
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extensions: [],
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/**
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* Can use window.location.origin to indicate the current
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* origin. Can contain a '*' to allow all domains or 'null' (as
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* a string) to support all file:// URLs. Cannot be set by
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* URL for security reasons (not safe, at least for
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* privacy or data integrity of SVG content).
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* Might have been fairly safe to allow
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* `new URL(window.location.href).origin` by default but
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* avoiding it ensures some more security that even third
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* party apps on the same domain also cannot communicate
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* with this app by default.
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* For use with ext-xdomain-messaging.js
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* @todo We might instead make as a user-facing preference.
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*/
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allowedOrigins: []
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},
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defaultExtensions = [
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'ext-overview_window.js',
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@ -315,13 +330,17 @@ TO-DOS
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$.pref(key, val);
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}
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}
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else if (key === 'extensions') {
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else if (['extensions', 'allowedOrigins'].indexOf(key) > -1) {
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if (cfgCfg.overwrite === false &&
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(curConfig.preventAllURLConfig || curConfig.lockExtensions)
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(
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curConfig.preventAllURLConfig ||
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key === 'allowedOrigins' ||
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(key === 'extensions' && curConfig.lockExtensions)
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)
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) {
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return;
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}
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curConfig.extensions = curConfig.extensions.concat(val); // We will handle any dupes later
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curConfig[key] = curConfig[key].concat(val); // We will handle any dupes later
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}
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// Only allow other curConfig if defined in defaultConfig
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else if (defaultConfig.hasOwnProperty(key)) {
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@ -421,13 +440,15 @@ TO-DOS
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function setupCurConfig () {
|
||||
curConfig = $.extend(true, {}, defaultConfig, curConfig); // Now safe to merge with priority for curConfig in the event any are already set
|
||||
|
||||
// Now deal with extensions
|
||||
// Now deal with extensions and other array config
|
||||
if (!curConfig.noDefaultExtensions) {
|
||||
curConfig.extensions = curConfig.extensions.concat(defaultExtensions);
|
||||
}
|
||||
// ...and remove any dupes
|
||||
curConfig.extensions = $.grep(curConfig.extensions, function (n, i) {
|
||||
return i === curConfig.extensions.indexOf(n);
|
||||
$.each(['extensions', 'allowedOrigins'], function (i, cfg) {
|
||||
curConfig[cfg] = $.grep(curConfig[cfg], function (n, i) {
|
||||
return i === curConfig[cfg].indexOf(n);
|
||||
});
|
||||
});
|
||||
// Export updated config
|
||||
editor.curConfig = curConfig;
|
||||
|
|
@ -4948,33 +4969,9 @@ TO-DOS
|
|||
updateCanvas(true);
|
||||
// });
|
||||
|
||||
// var revnums = "svg-editor.js ($Rev$) ";
|
||||
// revnums += svgCanvas.getVersion();
|
||||
// $('#copyright')[0].setAttribute('title', revnums);
|
||||
|
||||
// Callback handler for embedapi.js
|
||||
try {
|
||||
window.addEventListener('message', function(e) {
|
||||
// We accept and post strings for the sake of IE9 support
|
||||
if (typeof e.data !== 'string' || e.data.charAt() === '|') {
|
||||
return;
|
||||
}
|
||||
var data = JSON.parse(e.data);
|
||||
if (!data || typeof data !== 'object' || data.namespace !== 'svgCanvas') {
|
||||
return;
|
||||
}
|
||||
var cbid = data.id,
|
||||
name = data.name,
|
||||
args = data.args;
|
||||
try {
|
||||
e.source.postMessage(JSON.stringify({namespace: 'svg-edit', id: cbid, result: svgCanvas[name].apply(svgCanvas, args)}), '*');
|
||||
} catch(err) {
|
||||
e.source.postMessage(JSON.stringify({namespace: 'svg-edit', id: cbid, error: err.message}), '*');
|
||||
}
|
||||
}, false);
|
||||
} catch(err) {
|
||||
window.embed_error = err;
|
||||
}
|
||||
// var revnums = "svg-editor.js ($Rev$) ";
|
||||
// revnums += svgCanvas.getVersion();
|
||||
// $('#copyright')[0].setAttribute('title', revnums);
|
||||
|
||||
// For Compatibility with older extensions
|
||||
$(function() {
|
||||
|
|
|
|||
Loading…
Reference in New Issue