mirror/html2canvas
1
0
Fork 0
mirror of https://github.com/niklasvh/html2canvas.git synced 2023-08-10 21:13:10 +03:00
Code Issues Projects Releases Wiki Activity

test if canvas has become tainted

Browse Source
This commit is contained in:
Niklas von Hertzen 2012-03-01 18:44:52 +02:00
parent 1447b031c6
commit c86d12b915
1 changed files with 28 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
src/plugins/jquery.plugin.html2canvas.js
View File

@ -14,23 +14,37 @@
options.elements = this; options.elements = this;
options.flashcanvas = "../external/flashcanvas.min.js"; options.flashcanvas = "../external/flashcanvas.min.js";
html2canvas.logging = options && options.logging; html2canvas.logging = options && options.logging;
options.complete = function(images){ options.complete = function(images){
var queue = html2canvas.Parse(this[0], images, options), var queue = html2canvas.Parse(this[0], images, options),
$canvas = $(html2canvas.Renderer(queue, options)), $canvas = $(html2canvas.Renderer(queue, options)),
finishTime = new Date(); finishTime = new Date();
if (options && options.profile && window.console && window.console.profileEnd) { if (options && options.profile && window.console && window.console.profileEnd) {
console.profileEnd(); console.profileEnd();
}
$canvas.css({
position: 'absolute',
left: 0,
top: 0
}).appendTo(document.body);
$canvas.siblings().toggle();
$(window).click(function(){
$canvas.toggle().siblings().toggle();
throwMessage("Canvas Render " + ($canvas.is(':visible') ? "visible" : "hidden"));
});
throwMessage('Screenshot created in '+ ((finishTime.getTime()-timer)) + " ms<br />",4000);
// test if canvas is read-able
try {
$canvas[0].toDataURL();
} catch(e) {
if ($canvas[0].nodeName.toLowerCase() === "canvas") {
// TODO, maybe add a bit less offensive way to present this, but still something that can easily be noticed
alert("Canvas is tainted, unable to read data");
} }
$canvas.css({ position: 'absolute', left: 0, top: 0 }).appendTo(document.body); }
$canvas.siblings().toggle();
$(window).click(function(){
$canvas.toggle().siblings().toggle();
throwMessage("Canvas Render " + ($canvas.is(':visible') ? "visible" : "hidden"));
});
throwMessage('Screenshot created in '+ ((finishTime.getTime()-timer)) + " ms<br />",4000);
}; };
html2canvas.Preload(this[0], options); html2canvas.Preload(this[0], options);