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Allow multiple renders to occur simultaneously

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Niklas von Hertzen
2014-12-24 17:34:31 +02:00
parent 60368d4670
commit 2f5f9f6e59
4 changed files with 107 additions and 12 deletions
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13
src/core.js
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@ -1,8 +1,10 @@
var html2canvasNodeAttribute = "data-html2canvas-node";
var html2canvasCanvasCloneAttribute = "data-html2canvas-canvas-clone";
var html2canvasCanvasCloneIndex = 0;
var html2canvasCloneIndex = 0;
window.html2canvas = function(nodeList, options) {
var index = html2canvasCloneIndex++;
options = options || {};
if (options.logging) {
window.html2canvas.logging = true;
@ -25,8 +27,8 @@ window.html2canvas = function(nodeList, options) {
}
var node = ((nodeList === undefined) ? [document.documentElement] : ((nodeList.length) ? nodeList : [nodeList]))[0];
node.setAttribute(html2canvasNodeAttribute, "true");
return renderDocument(node.ownerDocument, options, node.ownerDocument.defaultView.innerWidth, node.ownerDocument.defaultView.innerHeight).then(function(canvas) {
node.setAttribute(html2canvasNodeAttribute + index, index);
return renderDocument(node.ownerDocument, options, node.ownerDocument.defaultView.innerWidth, node.ownerDocument.defaultView.innerHeight, index).then(function(canvas) {
if (typeof(options.onrendered) === "function") {
log("options.onrendered is deprecated, html2canvas returns a Promise containing the canvas");
options.onrendered(canvas);
@ -38,11 +40,12 @@ window.html2canvas = function(nodeList, options) {
window.html2canvas.punycode = this.punycode;
window.html2canvas.proxy = {};
function renderDocument(document, options, windowWidth, windowHeight) {
function renderDocument(document, options, windowWidth, windowHeight, html2canvasIndex) {
return createWindowClone(document, document, windowWidth, windowHeight, options).then(function(container) {
log("Document cloned");
var selector = "[" + html2canvasNodeAttribute + "='true']";
document.querySelector(selector).removeAttribute(html2canvasNodeAttribute);
var attributeName = html2canvasNodeAttribute + html2canvasIndex;
var selector = "[" + attributeName + "='" + html2canvasIndex + "']";
document.querySelector(selector).removeAttribute(attributeName);
var clonedWindow = container.contentWindow;
var node = clonedWindow.document.querySelector(selector);
var oncloneHandler = (typeof(options.onclone) === "function") ? Promise.resolve(options.onclone(clonedWindow.document)) : Promise.resolve(true);