mirror of
https://github.com/niklasvh/html2canvas.git
synced 2023-08-10 21:13:10 +03:00
IE origin fix
This commit is contained in:
Niklas von Hertzen
commit
1c6469d29b
678
src/Preload.js
678
src/Preload.js
@ -1,338 +1,340 @@
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/*
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html2canvas @VERSION@ <http://html2canvas.hertzen.com>
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Copyright (c) 2011 Niklas von Hertzen. All rights reserved.
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http://www.twitter.com/niklasvh
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Released under MIT License
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*/
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html2canvas.Preload = function(element, opts){
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var options = {
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proxy: "http://html2canvas.appspot.com/",
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timeout: 0 // no timeout
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},
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images = {
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numLoaded: 0, // also failed are counted here
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numFailed: 0,
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numTotal: 0,
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cleanupDone: false
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},
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pageOrigin = window.location.protocol + window.location.host,
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methods,
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i,
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count = 0,
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doc = element.ownerDocument,
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domImages = doc.images, // TODO probably should limit it to images present in the element only
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imgLen = domImages.length,
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link = doc.createElement("a");
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opts = opts || {};
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options = html2canvas.Util.Extend(opts, options);
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element = element || doc.body;
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function isSameOrigin(url){
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link.href = url;
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return ((link.protocol + link.host) === pageOrigin);
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}
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function start(){
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html2canvas.log("html2canvas: start: images: " + images.numLoaded + " / " + images.numTotal + " (failed: " + images.numFailed + ")");
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if (!images.firstRun && images.numLoaded >= images.numTotal){
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/*
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this.log('Finished loading '+this.imagesLoaded+' images, Started parsing');
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this.bodyOverflow = document.getElementsByTagName('body')[0].style.overflow;
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document.getElementsByTagName('body')[0].style.overflow = "hidden";
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*/
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if (typeof options.complete === "function"){
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options.complete(images);
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}
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html2canvas.log("Finished loading images: # " + images.numTotal + " (failed: " + images.numFailed + ")");
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}
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}
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function proxyGetImage(url, img){
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var callback_name,
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scriptUrl = options.proxy,
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script,
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imgObj = images[url];
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link.href = url;
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url = link.href; // work around for pages with base href="" set - WARNING: this may change the url -> so access imgObj from images map before changing that url!
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callback_name = 'html2canvas_' + count;
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imgObj.callbackname = callback_name;
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if (scriptUrl.indexOf("?") > -1) {
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scriptUrl += "&";
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} else {
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scriptUrl += "?";
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}
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scriptUrl += 'url=' + encodeURIComponent(url) + '&callback=' + callback_name;
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window[callback_name] = function(a){
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if (a.substring(0,6) === "error:"){
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imgObj.succeeded = false;
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images.numLoaded++;
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images.numFailed++;
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start();
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} else {
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img.onload = function(){
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imgObj.succeeded = true;
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images.numLoaded++;
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start();
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};
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img.src = a;
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}
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window[callback_name] = undefined; // to work with IE<9 // NOTE: that the undefined callback property-name still exists on the window object (for IE<9)
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try {
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delete window[callback_name]; // for all browser that support this
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} catch(ex) {}
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script.parentNode.removeChild(script);
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script = null;
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imgObj.callbackname = undefined;
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};
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count += 1;
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script = doc.createElement("script");
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script.setAttribute("src", scriptUrl);
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script.setAttribute("type", "text/javascript");
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imgObj.script = script;
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window.document.body.appendChild(script);
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/*
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// enable xhr2 requests where available (no need for base64 / json)
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$.ajax({
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data:{
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xhr2:false,
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url:url
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},
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url: options.proxy,
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dataType: "jsonp",
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success: function(a){
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if (a.substring(0,6) === "error:"){
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images.splice(getIndex(images, url), 2);
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start();
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}else{
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img.onload = function(){
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imagesLoaded+=1;
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start();
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};
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img.src = a;
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}
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},
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error: function(){
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images.splice(getIndex(images, url), 2);
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start();
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}
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});
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*/
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}
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function getImages (el) {
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// if (!this.ignoreRe.test(el.nodeName)){
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//
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var contents = html2canvas.Util.Children(el),
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i,
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contentsLen = contents.length,
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background_image,
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src,
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img,
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elNodeType = false;
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for (i = 0; i < contentsLen; i+=1 ){
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// var ignRe = new RegExp("("+this.ignoreElements+")");
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// if (!ignRe.test(element.nodeName)){
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getImages(contents[i]);
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// }
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}
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// }
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try {
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elNodeType = el.nodeType;
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} catch (ex) {
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elNodeType = false;
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html2canvas.log("html2canvas: failed to access some element's nodeType - Exception: " + ex.message);
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}
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if (elNodeType === 1 || elNodeType === undefined){
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background_image = html2canvas.Util.getCSS(el, 'backgroundImage');
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if ( background_image && background_image !== "1" && background_image !== "none" ) {
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// TODO add multi image background support
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if (background_image.substring(0,7) === "-webkit" || background_image.substring(0,3) === "-o-" || background_image.substring(0,4) === "-moz") {
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img = html2canvas.Generate.Gradient( background_image, html2canvas.Util.Bounds( el ) );
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if ( img !== undefined ){
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images[background_image] = { img: img, succeeded: true };
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images.numTotal++;
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images.numLoaded++;
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start();
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}
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} else {
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src = html2canvas.Util.backgroundImage(background_image.match(/data:image\/.*;base64,/i) ? background_image : background_image.split(",")[0]);
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methods.loadImage(src);
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}
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/*
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if (background_image && background_image !== "1" && background_image !== "none" && background_image.substring(0,7) !== "-webkit" && background_image.substring(0,3)!== "-o-" && background_image.substring(0,4) !== "-moz"){
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// TODO add multi image background support
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src = html2canvas.Util.backgroundImage(background_image.split(",")[0]);
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methods.loadImage(src); */
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}
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}
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}
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methods = {
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loadImage: function( src ) {
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var img;
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if ( images[src] === undefined ) {
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if ( src.match(/data:image\/.*;base64,/i) ) {
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//Base64 src
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img = new Image();
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img.src = src.replace(/url\(['"]{0,}|['"]{0,}\)$/ig, '');
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images[src] = { img: img, succeeded: true };
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images.numTotal++;
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images.numLoaded++;
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start();
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}else if ( isSameOrigin( src ) ) {
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img = new Image();
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images[src] = { img: img };
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images.numTotal++;
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img.onload = function() {
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images.numLoaded++;
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images[src].succeeded = true;
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start();
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};
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img.onerror = function() {
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images.numLoaded++;
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images.numFailed++;
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images[src].succeeded = false;
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start();
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};
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img.src = src;
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}else if ( options.proxy ){
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// console.log('b'+src);
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img = new Image();
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images[src] = { img: img };
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images.numTotal++;
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proxyGetImage( src, img );
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}
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}
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},
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cleanupDOM: function(cause) {
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var img;
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if (!images.cleanupDone) {
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if (cause && typeof cause === "string") {
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html2canvas.log("html2canvas: Cleanup because: " + cause);
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} else {
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html2canvas.log("html2canvas: Cleanup after timeout: " + options.timeout + " ms.");
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}
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for (src in images) {
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if (images.hasOwnProperty(src)) {
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img = images[src];
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if (typeof img === "object" && img.callbackname && img.succeeded === undefined) {
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// cancel proxy image request
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window[img.callbackname] = undefined; // to work with IE<9 // NOTE: that the undefined callback property-name still exists on the window object (for IE<9)
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try {
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delete window[img.callbackname]; // for all browser that support this
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} catch(ex) {}
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if (img.script && img.script.parentNode) {
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img.script.setAttribute("src", "about:blank"); // try to cancel running request
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img.script.parentNode.removeChild(img.script);
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}
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images.numLoaded++;
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images.numFailed++;
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html2canvas.log("html2canvas: Cleaned up failed img: '" + src + "' Steps: " + images.numLoaded + " / " + images.numTotal);
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}
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}
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}
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// cancel any pending requests
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if(window.stop !== undefined) {
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window.stop();
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} else if(document.execCommand !== undefined) {
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document.execCommand("Stop", false);
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}
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if (document.close !== undefined) {
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document.close();
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}
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images.cleanupDone = true;
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if (!(cause && typeof cause === "string")) {
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start();
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}
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}
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},
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renderingDone: function() {
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if (timeoutTimer) {
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window.clearTimeout(timeoutTimer);
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}
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}
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};
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if (options.timeout > 0) {
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timeoutTimer = window.setTimeout(methods.cleanupDOM, options.timeout);
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}
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var startTime = (new Date()).getTime();
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this.log('html2canvas: Preload starts: finding background-images');
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images.firstRun = true;
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getImages( element );
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this.log('html2canvas: Preload: Finding images');
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// load <img> images
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for (i = 0; i < imgLen; i+=1){
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var imgSrc = domImages[i].getAttribute( "src" );
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if ( imgSrc ) {
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methods.loadImage( imgSrc );
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}
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}
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images.firstRun = false;
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this.log('html2canvas: Preload: Done.');
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if ( images.numTotal === images.numLoaded ) {
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start();
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}
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return methods;
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};
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/*
|
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html2canvas @VERSION@ <http://html2canvas.hertzen.com>
|
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Copyright (c) 2011 Niklas von Hertzen. All rights reserved.
|
||||
http://www.twitter.com/niklasvh
|
||||
|
||||
Released under MIT License
|
||||
*/
|
||||
|
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html2canvas.Preload = function(element, opts){
|
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var options = {
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proxy: "http://html2canvas.appspot.com/",
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timeout: 0 // no timeout
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},
|
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images = {
|
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numLoaded: 0, // also failed are counted here
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numFailed: 0,
|
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numTotal: 0,
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cleanupDone: false
|
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},
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pageOrigin = window.location.protocol + window.location.host,
|
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methods,
|
||||
i,
|
||||
count = 0,
|
||||
doc = element.ownerDocument,
|
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domImages = doc.images, // TODO probably should limit it to images present in the element only
|
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imgLen = domImages.length,
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||||
link = doc.createElement("a");
|
||||
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link.href = window.location.href;
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pageOrigin = link.protocol + link.host;
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opts = opts || {};
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|
||||
options = html2canvas.Util.Extend(opts, options);
|
||||
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|
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element = element || doc.body;
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function isSameOrigin(url){
|
||||
link.href = url;
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||||
var origin = link.protocol + link.host;
|
||||
return ":" === origin || (origin === pageOrigin);
|
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}
|
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|
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function start(){
|
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html2canvas.log("html2canvas: start: images: " + images.numLoaded + " / " + images.numTotal + " (failed: " + images.numFailed + ")");
|
||||
if (!images.firstRun && images.numLoaded >= images.numTotal){
|
||||
|
||||
/*
|
||||
this.log('Finished loading '+this.imagesLoaded+' images, Started parsing');
|
||||
this.bodyOverflow = document.getElementsByTagName('body')[0].style.overflow;
|
||||
document.getElementsByTagName('body')[0].style.overflow = "hidden";
|
||||
*/
|
||||
if (typeof options.complete === "function"){
|
||||
options.complete(images);
|
||||
}
|
||||
|
||||
html2canvas.log("Finished loading images: # " + images.numTotal + " (failed: " + images.numFailed + ")");
|
||||
}
|
||||
}
|
||||
|
||||
function proxyGetImage(url, img){
|
||||
var callback_name,
|
||||
scriptUrl = options.proxy,
|
||||
script,
|
||||
imgObj = images[url];
|
||||
|
||||
link.href = url;
|
||||
url = link.href; // work around for pages with base href="" set - WARNING: this may change the url -> so access imgObj from images map before changing that url!
|
||||
|
||||
callback_name = 'html2canvas_' + count;
|
||||
imgObj.callbackname = callback_name;
|
||||
|
||||
if (scriptUrl.indexOf("?") > -1) {
|
||||
scriptUrl += "&";
|
||||
} else {
|
||||
scriptUrl += "?";
|
||||
}
|
||||
scriptUrl += 'url=' + encodeURIComponent(url) + '&callback=' + callback_name;
|
||||
|
||||
window[callback_name] = function(a){
|
||||
if (a.substring(0,6) === "error:"){
|
||||
imgObj.succeeded = false;
|
||||
images.numLoaded++;
|
||||
images.numFailed++;
|
||||
start();
|
||||
} else {
|
||||
img.onload = function(){
|
||||
imgObj.succeeded = true;
|
||||
images.numLoaded++;
|
||||
start();
|
||||
};
|
||||
img.src = a;
|
||||
}
|
||||
window[callback_name] = undefined; // to work with IE<9 // NOTE: that the undefined callback property-name still exists on the window object (for IE<9)
|
||||
try {
|
||||
delete window[callback_name]; // for all browser that support this
|
||||
} catch(ex) {}
|
||||
script.parentNode.removeChild(script);
|
||||
script = null;
|
||||
imgObj.callbackname = undefined;
|
||||
};
|
||||
|
||||
count += 1;
|
||||
|
||||
script = doc.createElement("script");
|
||||
script.setAttribute("src", scriptUrl);
|
||||
script.setAttribute("type", "text/javascript");
|
||||
imgObj.script = script;
|
||||
window.document.body.appendChild(script);
|
||||
|
||||
/*
|
||||
|
||||
// enable xhr2 requests where available (no need for base64 / json)
|
||||
|
||||
$.ajax({
|
||||
data:{
|
||||
xhr2:false,
|
||||
url:url
|
||||
},
|
||||
url: options.proxy,
|
||||
dataType: "jsonp",
|
||||
success: function(a){
|
||||
|
||||
if (a.substring(0,6) === "error:"){
|
||||
images.splice(getIndex(images, url), 2);
|
||||
start();
|
||||
}else{
|
||||
img.onload = function(){
|
||||
imagesLoaded+=1;
|
||||
start();
|
||||
|
||||
};
|
||||
img.src = a;
|
||||
}
|
||||
|
||||
|
||||
},
|
||||
error: function(){
|
||||
images.splice(getIndex(images, url), 2);
|
||||
start();
|
||||
}
|
||||
|
||||
|
||||
});
|
||||
*/
|
||||
}
|
||||
|
||||
function getImages (el) {
|
||||
|
||||
|
||||
|
||||
// if (!this.ignoreRe.test(el.nodeName)){
|
||||
//
|
||||
|
||||
var contents = html2canvas.Util.Children(el),
|
||||
i,
|
||||
contentsLen = contents.length,
|
||||
background_image,
|
||||
src,
|
||||
img,
|
||||
elNodeType = false;
|
||||
|
||||
for (i = 0; i < contentsLen; i+=1 ){
|
||||
// var ignRe = new RegExp("("+this.ignoreElements+")");
|
||||
// if (!ignRe.test(element.nodeName)){
|
||||
getImages(contents[i]);
|
||||
// }
|
||||
}
|
||||
|
||||
// }
|
||||
try {
|
||||
elNodeType = el.nodeType;
|
||||
} catch (ex) {
|
||||
elNodeType = false;
|
||||
html2canvas.log("html2canvas: failed to access some element's nodeType - Exception: " + ex.message);
|
||||
}
|
||||
|
||||
if (elNodeType === 1 || elNodeType === undefined){
|
||||
|
||||
background_image = html2canvas.Util.getCSS(el, 'backgroundImage');
|
||||
|
||||
if ( background_image && background_image !== "1" && background_image !== "none" ) {
|
||||
|
||||
// TODO add multi image background support
|
||||
|
||||
if (background_image.substring(0,7) === "-webkit" || background_image.substring(0,3) === "-o-" || background_image.substring(0,4) === "-moz") {
|
||||
|
||||
img = html2canvas.Generate.Gradient( background_image, html2canvas.Util.Bounds( el ) );
|
||||
|
||||
if ( img !== undefined ){
|
||||
images[background_image] = { img: img, succeeded: true };
|
||||
images.numTotal++;
|
||||
images.numLoaded++;
|
||||
start();
|
||||
|
||||
}
|
||||
|
||||
} else {
|
||||
src = html2canvas.Util.backgroundImage(background_image.match(/data:image\/.*;base64,/i) ? background_image : background_image.split(",")[0]);
|
||||
methods.loadImage(src);
|
||||
}
|
||||
|
||||
/*
|
||||
if (background_image && background_image !== "1" && background_image !== "none" && background_image.substring(0,7) !== "-webkit" && background_image.substring(0,3)!== "-o-" && background_image.substring(0,4) !== "-moz"){
|
||||
// TODO add multi image background support
|
||||
src = html2canvas.Util.backgroundImage(background_image.split(",")[0]);
|
||||
methods.loadImage(src); */
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
methods = {
|
||||
loadImage: function( src ) {
|
||||
var img;
|
||||
if ( images[src] === undefined ) {
|
||||
if ( src.match(/data:image\/.*;base64,/i) ) {
|
||||
|
||||
//Base64 src
|
||||
img = new Image();
|
||||
img.src = src.replace(/url\(['"]{0,}|['"]{0,}\)$/ig, '');
|
||||
images[src] = { img: img, succeeded: true };
|
||||
images.numTotal++;
|
||||
images.numLoaded++;
|
||||
start();
|
||||
|
||||
}else if ( isSameOrigin( src ) ) {
|
||||
|
||||
img = new Image();
|
||||
images[src] = { img: img };
|
||||
images.numTotal++;
|
||||
|
||||
img.onload = function() {
|
||||
images.numLoaded++;
|
||||
images[src].succeeded = true;
|
||||
start();
|
||||
};
|
||||
|
||||
img.onerror = function() {
|
||||
images.numLoaded++;
|
||||
images.numFailed++;
|
||||
images[src].succeeded = false;
|
||||
start();
|
||||
};
|
||||
|
||||
img.src = src;
|
||||
|
||||
}else if ( options.proxy ){
|
||||
// console.log('b'+src);
|
||||
img = new Image();
|
||||
images[src] = { img: img };
|
||||
images.numTotal++;
|
||||
proxyGetImage( src, img );
|
||||
}
|
||||
}
|
||||
|
||||
},
|
||||
cleanupDOM: function(cause) {
|
||||
var img;
|
||||
if (!images.cleanupDone) {
|
||||
if (cause && typeof cause === "string") {
|
||||
html2canvas.log("html2canvas: Cleanup because: " + cause);
|
||||
} else {
|
||||
html2canvas.log("html2canvas: Cleanup after timeout: " + options.timeout + " ms.");
|
||||
}
|
||||
|
||||
for (src in images) {
|
||||
if (images.hasOwnProperty(src)) {
|
||||
img = images[src];
|
||||
if (typeof img === "object" && img.callbackname && img.succeeded === undefined) {
|
||||
// cancel proxy image request
|
||||
window[img.callbackname] = undefined; // to work with IE<9 // NOTE: that the undefined callback property-name still exists on the window object (for IE<9)
|
||||
try {
|
||||
delete window[img.callbackname]; // for all browser that support this
|
||||
} catch(ex) {}
|
||||
if (img.script && img.script.parentNode) {
|
||||
img.script.setAttribute("src", "about:blank"); // try to cancel running request
|
||||
img.script.parentNode.removeChild(img.script);
|
||||
}
|
||||
images.numLoaded++;
|
||||
images.numFailed++;
|
||||
html2canvas.log("html2canvas: Cleaned up failed img: '" + src + "' Steps: " + images.numLoaded + " / " + images.numTotal);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// cancel any pending requests
|
||||
if(window.stop !== undefined) {
|
||||
window.stop();
|
||||
} else if(document.execCommand !== undefined) {
|
||||
document.execCommand("Stop", false);
|
||||
}
|
||||
if (document.close !== undefined) {
|
||||
document.close();
|
||||
}
|
||||
images.cleanupDone = true;
|
||||
if (!(cause && typeof cause === "string")) {
|
||||
start();
|
||||
}
|
||||
}
|
||||
},
|
||||
renderingDone: function() {
|
||||
if (timeoutTimer) {
|
||||
window.clearTimeout(timeoutTimer);
|
||||
}
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
if (options.timeout > 0) {
|
||||
timeoutTimer = window.setTimeout(methods.cleanupDOM, options.timeout);
|
||||
}
|
||||
var startTime = (new Date()).getTime();
|
||||
this.log('html2canvas: Preload starts: finding background-images');
|
||||
images.firstRun = true;
|
||||
|
||||
getImages( element );
|
||||
|
||||
this.log('html2canvas: Preload: Finding images');
|
||||
// load <img> images
|
||||
for (i = 0; i < imgLen; i+=1){
|
||||
var imgSrc = domImages[i].getAttribute( "src" );
|
||||
if ( imgSrc ) {
|
||||
methods.loadImage( imgSrc );
|
||||
}
|
||||
}
|
||||
|
||||
images.firstRun = false;
|
||||
this.log('html2canvas: Preload: Done.');
|
||||
if ( images.numTotal === images.numLoaded ) {
|
||||
start();
|
||||
}
|
||||
|
||||
return methods;
|
||||
|
||||
};
|
||||
|
||||
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user