From 8a3d1d7f2261af25eaf9bedf0fafb051319f79c2 Mon Sep 17 00:00:00 2001 From: Niklas von Hertzen Date: Sat, 27 Sep 2014 23:03:57 +0300 Subject: [PATCH] Fix firefox cross-origin iframe rendering --- dist/html2canvas.js | 70 ++++++++++++++++++++++++----------------- dist/html2canvas.min.js | 4 +-- src/core.js | 21 +++++++------ src/framecontainer.js | 2 +- src/imageloader.js | 43 ++++++++++++++++--------- src/nodeparser.js | 2 +- src/renderers/canvas.js | 2 +- 7 files changed, 86 insertions(+), 58 deletions(-) diff --git a/dist/html2canvas.js b/dist/html2canvas.js index b7b0ab1..ec04c84 100644 --- a/dist/html2canvas.js +++ b/dist/html2canvas.js @@ -581,6 +581,7 @@ window.html2canvas = function(nodeList, options) { options.allowTaint = typeof(options.allowTaint) === "undefined" ? false : options.allowTaint; options.removeContainer = typeof(options.removeContainer) === "undefined" ? true : options.removeContainer; options.javascriptEnabled = typeof(options.javascriptEnabled) === "undefined" ? false : options.javascriptEnabled; + options.imageTimeout = typeof(options.imageTimeout) === "undefined" ? 10000 : options.imageTimeout; if (typeof(nodeList) === "string") { if (typeof(options.proxy) !== "string") { @@ -627,7 +628,7 @@ function renderWindow(node, container, options, windowWidth, windowHeight) { var parser = new NodeParser(node, renderer, support, imageLoader, options); return parser.ready.then(function() { log("Finished rendering"); - var canvas = (options.type !== "view" && (node === clonedWindow.document.body || node === clonedWindow.document.documentElement)) ? renderer.canvas : crop(renderer.canvas, bounds); + var canvas = (options.type !== "view" && (node === clonedWindow.document.body || node === clonedWindow.document.documentElement)) ? renderer.canvas : crop(renderer.canvas, {width: width, height: height, top: bounds.top, left: bounds.left}); cleanupContainer(container, options); return canvas; }); @@ -693,10 +694,13 @@ function createWindowClone(ownerDocument, containerDocument, width, height, opti if window url is about:blank, we can assign the url to current by writing onto the document */ container.contentWindow.onload = container.onload = function() { - setTimeout(function() { - cloneCanvasContents(ownerDocument, documentClone); - resolve(container); - }, 0); + var interval = setInterval(function() { + if (documentClone.body.childNodes.length > 0) { + cloneCanvasContents(ownerDocument, documentClone); + clearInterval(interval); + resolve(container); + } + }, 50); }; documentClone.open(); @@ -718,11 +722,8 @@ function loadUrlDocument(src, proxy, document, width, height, options) { function documentFromHTML(src) { return function(html) { - var doc = document.implementation.createHTMLDocument(""); - doc.open(); - doc.write(html); - doc.close(); - + var parser = new DOMParser(); + var doc = parser.parseFromString(html, "text/html"); var b = doc.querySelector("base"); if (!b || !b.href.host) { var base = doc.createElement("base"); @@ -871,7 +872,7 @@ function FrameContainer(container, sameOrigin, options) { resolve(container); } })).then(function(container) { - return html2canvas(container.contentWindow.document.documentElement, {type: 'view', proxy: options.proxy, javascriptEnabled: options.javascriptEnabled, removeContainer: options.removeContainer}); + return html2canvas(container.contentWindow.document.documentElement, {type: 'view', width: container.width, height: container.height, proxy: options.proxy, javascriptEnabled: options.javascriptEnabled, removeContainer: options.removeContainer, allowTaint: options.allowTaint, imageTimeout: options.imageTimeout / 2}); }).then(function(canvas) { return self.image = canvas; }); @@ -927,17 +928,17 @@ ImageLoader.prototype.findImages = function(nodes) { var images = []; nodes.reduce(function(imageNodes, container) { switch(container.node.nodeName) { - case "IMG": - return imageNodes.concat([{ - args: [container.node.src], - method: "url" - }]); - case "svg": - case "IFRAME": - return imageNodes.concat([{ - args: [container.node], - method: container.node.nodeName - }]); + case "IMG": + return imageNodes.concat([{ + args: [container.node.src], + method: "url" + }]); + case "svg": + case "IFRAME": + return imageNodes.concat([{ + args: [container.node], + method: container.node.nodeName + }]); } return imageNodes; }, []).forEach(this.addImage(images, this.loadImage), this); @@ -1012,7 +1013,7 @@ ImageLoader.prototype.isSameOrigin = function(url) { }; ImageLoader.prototype.getPromise = function(container) { - return container.promise['catch'](function() { + return this.timeout(container, this.options.imageTimeout)['catch'](function() { var dummy = new DummyImageContainer(container.src); return dummy.promise.then(function(image) { container.image = image; @@ -1031,16 +1032,29 @@ ImageLoader.prototype.fetch = function(nodes) { this.images = nodes.reduce(bind(this.findBackgroundImage, this), this.findImages(nodes)); this.images.forEach(function(image, index) { image.promise.then(function() { - log("Succesfully loaded image #"+ (index+1)); + log("Succesfully loaded image #"+ (index+1), image); }, function(e) { - log("Failed loading image #"+ (index+1), e); + log("Failed loading image #"+ (index+1), image, e); }); }); - this.ready = Promise.all(this.images.map(this.getPromise)); + this.ready = Promise.all(this.images.map(this.getPromise, this)); log("Finished searching images"); return this; }; +ImageLoader.prototype.timeout = function(container, timeout) { + var timer; + return Promise.race([container.promise, new Promise(function(res, reject) { + timer = setTimeout(function() { + log("Timed out loading image", container); + reject(container); + }, timeout); + })]).then(function(container) { + clearTimeout(timer); + return container; + }); +}; + function LinearGradientContainer(imageData) { GradientContainer.apply(this, arguments); this.type = this.TYPES.LINEAR; @@ -1509,7 +1523,7 @@ function NodeParser(element, renderer, support, imageLoader, options) { return container.visible = container.isElementVisible(); }).map(this.getPseudoElements, this)); this.fontMetrics = new FontMetrics(); - log("Fetched nodes"); + log("Fetched nodes, total:", this.nodes.length); this.images = imageLoader.fetch(this.nodes.filter(isElement)); this.ready = this.images.ready.then(bind(function() { log("Images loaded, starting parsing"); @@ -2658,7 +2672,7 @@ function CanvasRenderer(width, height) { this.taintCtx = this.document.createElement("canvas").getContext("2d"); this.ctx.textBaseline = "bottom"; this.variables = {}; - log("Initialized CanvasRenderer"); + log("Initialized CanvasRenderer with size", width, "x", height); } CanvasRenderer.prototype = Object.create(Renderer.prototype); diff --git a/dist/html2canvas.min.js b/dist/html2canvas.min.js index 08807e4..7fe873b 100644 --- a/dist/html2canvas.min.js +++ b/dist/html2canvas.min.js @@ -4,5 +4,5 @@ Released under MIT License */ 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b=a.contexts.filter(T),c=a.children.filter(fb),d=c.filter(eb(cb)),e=d.filter(eb(bb)).filter(eb(W)),f=c.filter(eb(bb)).filter(cb),g=d.filter(eb(bb)).filter(W),h=a.contexts.concat(d.filter(bb)).filter(V),i=a.children.filter(gb).filter(Y),j=a.contexts.filter(U);b.concat(e).concat(f).concat(g).concat(h).concat(i).concat(j).forEach(function(a){this.renderQueue.push(a),X(a)&&(this.parse(a),this.renderQueue.push(new N))},this)},K.prototype.paint=function(a){try{a instanceof N?this.renderer.ctx.restore():gb(a)?this.paintText(a):this.paintNode(a)}catch(b){A(b)}},K.prototype.paintNode=function(a){X(a)&&(this.renderer.setOpacity(a.opacity),this.renderer.ctx.save(),a.hasTransform()&&this.renderer.setTransform(a.parseTransform()));var b=a.parseBounds();this.renderer.clip(a.backgroundClip,function(){this.renderer.renderBackground(a,b,a.borders.borders.map(lb))},this),this.renderer.clip(a.clip,function(){switch(this.renderer.renderBorders(a.borders.borders),a.node.nodeName){case"svg":case"IFRAME":var c=this.images.get(a.node);c?this.renderer.renderImage(a,b,a.borders,c):A("Error loading <"+a.node.nodeName+">",a.node);break;case"IMG":var d=this.images.get(a.node.src);d?this.renderer.renderImage(a,b,a.borders,d):A("Error loading ",a.node.src);break;case"CANVAS":this.renderer.renderImage(a,b,a.borders,{image:a.node});break;case"SELECT":case"INPUT":case"TEXTAREA":this.paintFormValue(a)}},this)},K.prototype.paintFormValue=function(a){if(a.getValue().length>0){var b=a.node.ownerDocument,c=b.createElement("html2canvaswrapper"),d=["lineHeight","textAlign","fontFamily","fontWeight","fontSize","color","paddingLeft","paddingTop","paddingRight","paddingBottom","width","height","borderLeftStyle","borderTopStyle","borderLeftWidth","borderTopWidth","boxSizing","whiteSpace","wordWrap"];d.forEach(function(b){try{c.style[b]=a.css(b)}catch(d){A("html2canvas: Parse: Exception caught in renderFormValue: "+d.message)}});var e=a.parseBounds();c.style.position="absolute",c.style.left=e.left+"px",c.style.top=e.top+"px",c.textContent=a.getValue(),b.body.appendChild(c),this.paintText(new Eb(c.firstChild,a)),b.body.removeChild(c)}},K.prototype.paintText=function(b){b.applyTextTransform();var c=a.html2canvas.punycode.ucs2.decode(b.node.data),d=this.options.letterRendering&&!Z(b)||rb(b.node.data)?c.map(function(b){return a.html2canvas.punycode.ucs2.encode([b])}):pb(c),e=b.parent.fontWeight(),f=b.parent.css("fontSize"),g=b.parent.css("fontFamily"),h=b.parent.parseTextShadows();this.renderer.font(b.parent.css("color"),b.parent.css("fontStyle"),b.parent.css("fontVariant"),e,f,g),h.length?this.renderer.fontShadow(h[0].color,h[0].offsetX,h[0].offsetY,h[0].blur):this.renderer.clearShadow(),this.renderer.clip(b.parent.clip,function(){d.map(this.parseTextBounds(b),this).forEach(function(a,c){a&&(this.renderer.text(d[c],a.left,a.bottom),this.renderTextDecoration(b.parent,a,this.fontMetrics.getMetrics(g,f)))},this)},this)},K.prototype.renderTextDecoration=function(a,b,c){switch(a.css("textDecoration").split(" 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1:g=b.left+b.width-d[1].width,i=d[1].width,a.args=R({c1:[g+i,h],c2:[g+i,h+j+d[2].width],c3:[g,h+j],c4:[g,h+d[0].width]},c[1],c[2],e.topRightOuter,e.topRightInner,e.bottomRightOuter,e.bottomRightInner);break;case 2:h=h+b.height-d[2].width,j=d[2].width,a.args=R({c1:[g+i,h+j],c2:[g,h+j],c3:[g+d[3].width,h],c4:[g+i-d[3].width,h]},c[2],c[3],e.bottomRightOuter,e.bottomRightInner,e.bottomLeftOuter,e.bottomLeftInner);break;case 3:i=d[3].width,a.args=R({c1:[g,h+j+d[2].width],c2:[g,h],c3:[g+i,h+d[0].width],c4:[g+i,h+j]},c[3],c[0],e.bottomLeftOuter,e.bottomLeftInner,e.topLeftOuter,e.topLeftInner)}}return a})}},K.prototype.parseBackgroundClip=function(a,b,c,d,e){var f=a.css("backgroundClip"),g=[];switch(f){case"content-box":case"padding-box":S(g,d[0],d[1],b.topLeftInner,b.topRightInner,e.left+c[3].width,e.top+c[0].width),S(g,d[1],d[2],b.topRightInner,b.bottomRightInner,e.left+e.width-c[1].width,e.top+c[0].width),S(g,d[2],d[3],b.bottomRightInner,b.bottomLeftInner,e.left+e.width-c[1].width,e.top+e.height-c[2].width),S(g,d[3],d[0],b.bottomLeftInner,b.topLeftInner,e.left+c[3].width,e.top+e.height-c[2].width);break;default:S(g,d[0],d[1],b.topLeftOuter,b.topRightOuter,e.left,e.top),S(g,d[1],d[2],b.topRightOuter,b.bottomRightOuter,e.left+e.width,e.top),S(g,d[2],d[3],b.bottomRightOuter,b.bottomLeftOuter,e.left+e.width,e.top+e.height),S(g,d[3],d[0],b.bottomLeftOuter,b.topLeftOuter,e.left,e.top+e.height)}return g},K.prototype.pseudoHideClass="___html2canvas___pseudoelement";var Nb=0,Ob="withCredentials"in new XMLHttpRequest,Pb="crossOrigin"in new Image;yb.prototype.renderImage=function(a,b,c,d){var e=a.cssInt("paddingLeft"),f=a.cssInt("paddingTop"),g=a.cssInt("paddingRight"),h=a.cssInt("paddingBottom"),i=c.borders,j=b.width-(i[1].width+i[3].width+e+g),k=b.height-(i[0].width+i[2].width+f+h);this.drawImage(d,0,0,d.image.width||j,d.image.height||k,b.left+e+i[3].width,b.top+f+i[0].width,j,k)},yb.prototype.renderBackground=function(a,b,c){b.height>0&&b.width>0&&(this.renderBackgroundColor(a,b),this.renderBackgroundImage(a,b,c))},yb.prototype.renderBackgroundColor=function(a,b){var c=a.css("backgroundColor");this.isTransparent(c)||this.rectangle(b.left,b.top,b.width,b.height,a.css("backgroundColor"))},yb.prototype.renderBorders=function(a){a.forEach(this.renderBorder,this)},yb.prototype.renderBorder=function(a){this.isTransparent(a.color)||null===a.args||this.drawShape(a.args,a.color)},yb.prototype.renderBackgroundImage=function(a,b,c){var d=a.parseBackgroundImages();d.reverse().forEach(function(d,e,f){switch(d.method){case"url":var g=this.images.get(d.args[0]);g?this.renderBackgroundRepeating(a,b,g,f.length-(e+1),c):A("Error loading background-image",d.args[0]);break;case"linear-gradient":case"gradient":var h=this.images.get(d.value);h?this.renderBackgroundGradient(h,b,c):A("Error loading background-image",d.args[0]);break;case"none":break;default:A("Unknown background-image type",d.args[0])}},this)},yb.prototype.renderBackgroundRepeating=function(a,b,c,d,e){var f=a.parseBackgroundSize(b,c.image,d),g=a.parseBackgroundPosition(b,c.image,d,f),h=a.parseBackgroundRepeat(d);switch(h){case"repeat-x":case"repeat no-repeat":this.backgroundRepeatShape(c,g,f,b,b.left+e[3],b.top+g.top+e[0],99999,f.height,e);break;case"repeat-y":case"no-repeat repeat":this.backgroundRepeatShape(c,g,f,b,b.left+g.left+e[3],b.top+e[0],f.width,99999,e);break;case"no-repeat":this.backgroundRepeatShape(c,g,f,b,b.left+g.left+e[3],b.top+g.top+e[0],f.width,f.height,e);break;default:this.renderBackgroundRepeat(c,g,f,{top:b.top,left:b.left},e[3],e[0])}},yb.prototype.isTransparent=function(a){return!a||"transparent"===a||"rgba(0, 0, 0, 0)"===a},zb.prototype=Object.create(B.prototype),zb.prototype.getParentStack=function(a){var b=this.parent?this.parent.stack:null;return b?b.ownStacking?b:b.getParentStack(a):a.stack},Ab.prototype.testRangeBounds=function(a){var b,c,d,e,f=!1;return a.createRange&&(b=a.createRange(),b.getBoundingClientRect&&(c=a.createElement("boundtest"),c.style.height="123px",c.style.display="block",a.body.appendChild(c),b.selectNode(c),d=b.getBoundingClientRect(),e=d.height,123===e&&(f=!0),a.body.removeChild(c))),f},Ab.prototype.testCORS=function(){return"undefined"!=typeof(new Image).crossOrigin},Ab.prototype.testSVG=function(){var a=new Image,c=b.createElement("canvas"),d=c.getContext("2d");a.src="data:image/svg+xml,";try{d.drawImage(a,0,0),c.toDataURL()}catch(e){return!1}return!0},Bb.prototype.hasFabric=function(){return html2canvas.fabric?Promise.resolve():Promise.reject(new Error("html2canvas.svg.js is not loaded, cannot render svg"))},Bb.prototype.inlineFormatting=function(a){return/^data:image\/svg\+xml;base64,/.test(a)?this.decode64(this.removeContentType(a)):this.removeContentType(a)},Bb.prototype.removeContentType=function(a){return a.replace(/^data:image\/svg\+xml(;base64)?,/,"")},Bb.prototype.isInline=function(a){return/^data:image\/svg\+xml/i.test(a)},Bb.prototype.createCanvas=function(a){var b=this;return function(c,d){var e=new html2canvas.fabric.StaticCanvas("c");b.image=e.lowerCanvasEl,e.setWidth(d.width).setHeight(d.height).add(html2canvas.fabric.util.groupSVGElements(c,d)).renderAll(),a(e.lowerCanvasEl)}},Bb.prototype.decode64=function(b){return"function"==typeof a.atob?a.atob(b):Cb(b)},Db.prototype=Object.create(Bb.prototype),Eb.prototype=Object.create(B.prototype),Eb.prototype.applyTextTransform=function(){this.node.data=this.transform(this.parent.css("textTransform"))},Eb.prototype.transform=function(a){var b=this.node.data;switch(a){case"lowercase":return b.toLowerCase();case"capitalize":return b.replace(/(^|\s|:|-|\(|\))([a-z])/g,Fb);case"uppercase":return b.toUpperCase();default:return b}},Gb.prototype=Object.create(w.prototype),Ib.prototype=Object.create(yb.prototype),Ib.prototype.setFillStyle=function(a){return this.ctx.fillStyle=a,this.ctx},Ib.prototype.rectangle=function(a,b,c,d,e){this.setFillStyle(e).fillRect(a,b,c,d)},Ib.prototype.drawShape=function(a,b){this.shape(a),this.setFillStyle(b).fill()},Ib.prototype.taints=function(a){if(null===a.tainted){this.taintCtx.drawImage(a.image,0,0);try{this.taintCtx.getImageData(0,0,1,1),a.tainted=!1}catch(c){this.taintCtx=b.createElement("canvas").getContext("2d"),a.tainted=!0}}return a.tainted},Ib.prototype.drawImage=function(a,b,c,d,e,f,g,h,i){(!this.taints(a)||this.options.allowTaint)&&this.ctx.drawImage(a.image,b,c,d,e,f,g,h,i)},Ib.prototype.clip=function(a,b,c){this.ctx.save(),a.filter(Jb).forEach(function(a){this.shape(a).clip()},this),b.call(c),this.ctx.restore()},Ib.prototype.shape=function(a){return this.ctx.beginPath(),a.forEach(function(a,b){this.ctx[0===b?"moveTo":a[0]+"To"].apply(this.ctx,a.slice(1))},this),this.ctx.closePath(),this.ctx},Ib.prototype.font=function(a,b,c,d,e,f){this.setFillStyle(a).font=[b,c,d,e,f].join(" 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j=[["line",Math.round(e),Math.round(f)],["line",Math.round(e+g),Math.round(f)],["line",Math.round(e+g),Math.round(h+f)],["line",Math.round(e),Math.round(h+f)]];this.clip([j],function(){this.renderBackgroundRepeat(a,b,c,d,i[3],i[0])},this)},Ib.prototype.renderBackgroundRepeat=function(a,b,c,d,e,f){var g=Math.round(d.left+b.left+e),h=Math.round(d.top+b.top+f);this.setFillStyle(this.ctx.createPattern(this.resizeImage(a,c),"repeat")),this.ctx.translate(g,h),this.ctx.fill(),this.ctx.translate(-g,-h)},Ib.prototype.renderBackgroundGradient=function(a,b){if(a instanceof z){var c=this.ctx.createLinearGradient(b.left+b.width*a.x0,b.top+b.height*a.y0,b.left+b.width*a.x1,b.top+b.height*a.y1);a.colorStops.forEach(function(a){c.addColorStop(a.stop,a.color)}),this.rectangle(b.left,b.top,b.width,b.height,c)}},Ib.prototype.resizeImage=function(a,c){var d=a.image;if(d.width===c.width&&d.height===c.height)return d;var e,f=b.createElement("canvas");return 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this.node.nodeType===Node.TEXT_NODE?this.parent.visible:"none"!==this.css("display")&&"hidden"!==this.css("visibility")&&!this.node.hasAttribute("data-html2canvas-ignore")&&("INPUT"!==this.node.nodeName||"hidden"!==this.node.getAttribute("type"))},B.prototype.css=function(a){return this.computedStyles||(this.computedStyles=this.computedStyle(null)),this.styles[a]||(this.styles[a]=this.computedStyles[a])},B.prototype.prefixedCss=function(a){var b=["webkit","moz","ms","o"],d=this.css(a);return d===c&&b.some(function(b){return d=this.css(b+a.substr(0,1).toUpperCase()+a.substr(1)),d!==c},this),d===c?null:d},B.prototype.computedStyle=function(a){return this.node.ownerDocument.defaultView.getComputedStyle(this.node,a)},B.prototype.cssInt=function(a){var b=parseInt(this.css(a),10);return isNaN(b)?0:b},B.prototype.cssFloat=function(a){var b=parseFloat(this.css(a));return isNaN(b)?0:b},B.prototype.fontWeight=function(){var a=this.css("fontWeight");switch(parseInt(a,10)){case 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b.nodeType===Node.ELEMENT_NODE&&c.length&&"TEXTAREA"!==b.tagName?c[0].isElementVisible()?c.concat(this.getChildren(c[0])):[]:c},this))},K.prototype.newStackingContext=function(a,b){var c=new zb(b,a.cssFloat("opacity"),a.node,a.parent);c.visible=a.visible,c.borders=a.borders,c.bounds=a.bounds,c.clip=a.clip,c.backgroundClip=a.backgroundClip;var d=b?c.getParentStack(this):c.parent.stack;d.contexts.push(c),a.stack=c},K.prototype.createStackingContexts=function(){this.nodes.forEach(function(a){fb(a)&&(this.isRootElement(a)||ib(a)||ab(a)||this.isBodyWithTransparentRoot(a)||a.hasTransform())?this.newStackingContext(a,!0):fb(a)&&(bb(a)&&V(a)||db(a)||cb(a))?this.newStackingContext(a,!1):a.assignStack(a.parent.stack)},this)},K.prototype.isBodyWithTransparentRoot=function(a){return"BODY"===a.node.nodeName&&this.renderer.isTransparent(a.parent.css("backgroundColor"))},K.prototype.isRootElement=function(a){return null===a.parent},K.prototype.sortStackingContexts=function(a){a.contexts.sort(hb),a.contexts.forEach(this.sortStackingContexts,this)},K.prototype.parseTextBounds=function(a){return function(b,c,d){if("none"!==a.parent.css("textDecoration").substr(0,4)||0!==b.trim().length){if(this.support.rangeBounds&&!a.parent.hasTransform()){var e=d.slice(0,c).join("").length;return this.getRangeBounds(a.node,e,b.length)}if(a.node&&"string"==typeof a.node.data){var f=a.node.splitText(b.length),g=this.getWrapperBounds(a.node,a.parent.hasTransform());return a.node=f,g}}else(!this.support.rangeBounds||a.parent.hasTransform())&&(a.node=a.node.splitText(b.length));return{}}},K.prototype.getWrapperBounds=function(a,b){var c=a.ownerDocument.createElement("html2canvaswrapper"),d=a.parentNode,e=a.cloneNode(!0);c.appendChild(a.cloneNode(!0)),d.replaceChild(c,a);var f=b?J(c):I(c);return d.replaceChild(e,c),f},K.prototype.getRangeBounds=function(a,b,c){var d=this.range||(this.range=a.ownerDocument.createRange());return d.setStart(a,b),d.setEnd(a,b+c),d.getBoundingClientRect()},K.prototype.parse=function(a){var b=a.contexts.filter(T),c=a.children.filter(fb),d=c.filter(eb(cb)),e=d.filter(eb(bb)).filter(eb(W)),f=c.filter(eb(bb)).filter(cb),g=d.filter(eb(bb)).filter(W),h=a.contexts.concat(d.filter(bb)).filter(V),i=a.children.filter(gb).filter(Y),j=a.contexts.filter(U);b.concat(e).concat(f).concat(g).concat(h).concat(i).concat(j).forEach(function(a){this.renderQueue.push(a),X(a)&&(this.parse(a),this.renderQueue.push(new N))},this)},K.prototype.paint=function(a){try{a instanceof N?this.renderer.ctx.restore():gb(a)?this.paintText(a):this.paintNode(a)}catch(b){A(b)}},K.prototype.paintNode=function(a){X(a)&&(this.renderer.setOpacity(a.opacity),this.renderer.ctx.save(),a.hasTransform()&&this.renderer.setTransform(a.parseTransform()));var b=a.parseBounds();this.renderer.clip(a.backgroundClip,function(){this.renderer.renderBackground(a,b,a.borders.borders.map(lb))},this),this.renderer.clip(a.clip,function(){switch(this.renderer.renderBorders(a.borders.borders),a.node.nodeName){case"svg":case"IFRAME":var c=this.images.get(a.node);c?this.renderer.renderImage(a,b,a.borders,c):A("Error loading <"+a.node.nodeName+">",a.node);break;case"IMG":var d=this.images.get(a.node.src);d?this.renderer.renderImage(a,b,a.borders,d):A("Error loading ",a.node.src);break;case"CANVAS":this.renderer.renderImage(a,b,a.borders,{image:a.node});break;case"SELECT":case"INPUT":case"TEXTAREA":this.paintFormValue(a)}},this)},K.prototype.paintFormValue=function(a){if(a.getValue().length>0){var b=a.node.ownerDocument,c=b.createElement("html2canvaswrapper"),d=["lineHeight","textAlign","fontFamily","fontWeight","fontSize","color","paddingLeft","paddingTop","paddingRight","paddingBottom","width","height","borderLeftStyle","borderTopStyle","borderLeftWidth","borderTopWidth","boxSizing","whiteSpace","wordWrap"];d.forEach(function(b){try{c.style[b]=a.css(b)}catch(d){A("html2canvas: Parse: Exception caught in renderFormValue: "+d.message)}});var e=a.parseBounds();c.style.position="absolute",c.style.left=e.left+"px",c.style.top=e.top+"px",c.textContent=a.getValue(),b.body.appendChild(c),this.paintText(new Eb(c.firstChild,a)),b.body.removeChild(c)}},K.prototype.paintText=function(b){b.applyTextTransform();var c=a.html2canvas.punycode.ucs2.decode(b.node.data),d=this.options.letterRendering&&!Z(b)||rb(b.node.data)?c.map(function(b){return a.html2canvas.punycode.ucs2.encode([b])}):pb(c),e=b.parent.fontWeight(),f=b.parent.css("fontSize"),g=b.parent.css("fontFamily"),h=b.parent.parseTextShadows();this.renderer.font(b.parent.css("color"),b.parent.css("fontStyle"),b.parent.css("fontVariant"),e,f,g),h.length?this.renderer.fontShadow(h[0].color,h[0].offsetX,h[0].offsetY,h[0].blur):this.renderer.clearShadow(),this.renderer.clip(b.parent.clip,function(){d.map(this.parseTextBounds(b),this).forEach(function(a,c){a&&(this.renderer.text(d[c],a.left,a.bottom),this.renderTextDecoration(b.parent,a,this.fontMetrics.getMetrics(g,f)))},this)},this)},K.prototype.renderTextDecoration=function(a,b,c){switch(a.css("textDecoration").split(" 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1:g=b.left+b.width-d[1].width,i=d[1].width,a.args=R({c1:[g+i,h],c2:[g+i,h+j+d[2].width],c3:[g,h+j],c4:[g,h+d[0].width]},c[1],c[2],e.topRightOuter,e.topRightInner,e.bottomRightOuter,e.bottomRightInner);break;case 2:h=h+b.height-d[2].width,j=d[2].width,a.args=R({c1:[g+i,h+j],c2:[g,h+j],c3:[g+d[3].width,h],c4:[g+i-d[3].width,h]},c[2],c[3],e.bottomRightOuter,e.bottomRightInner,e.bottomLeftOuter,e.bottomLeftInner);break;case 3:i=d[3].width,a.args=R({c1:[g,h+j+d[2].width],c2:[g,h],c3:[g+i,h+d[0].width],c4:[g+i,h+j]},c[3],c[0],e.bottomLeftOuter,e.bottomLeftInner,e.topLeftOuter,e.topLeftInner)}}return a})}},K.prototype.parseBackgroundClip=function(a,b,c,d,e){var f=a.css("backgroundClip"),g=[];switch(f){case"content-box":case"padding-box":S(g,d[0],d[1],b.topLeftInner,b.topRightInner,e.left+c[3].width,e.top+c[0].width),S(g,d[1],d[2],b.topRightInner,b.bottomRightInner,e.left+e.width-c[1].width,e.top+c[0].width),S(g,d[2],d[3],b.bottomRightInner,b.bottomLeftInner,e.left+e.width-c[1].width,e.top+e.height-c[2].width),S(g,d[3],d[0],b.bottomLeftInner,b.topLeftInner,e.left+c[3].width,e.top+e.height-c[2].width);break;default:S(g,d[0],d[1],b.topLeftOuter,b.topRightOuter,e.left,e.top),S(g,d[1],d[2],b.topRightOuter,b.bottomRightOuter,e.left+e.width,e.top),S(g,d[2],d[3],b.bottomRightOuter,b.bottomLeftOuter,e.left+e.width,e.top+e.height),S(g,d[3],d[0],b.bottomLeftOuter,b.topLeftOuter,e.left,e.top+e.height)}return g},K.prototype.pseudoHideClass="___html2canvas___pseudoelement";var Nb=0,Ob="withCredentials"in new XMLHttpRequest,Pb="crossOrigin"in new Image;yb.prototype.renderImage=function(a,b,c,d){var e=a.cssInt("paddingLeft"),f=a.cssInt("paddingTop"),g=a.cssInt("paddingRight"),h=a.cssInt("paddingBottom"),i=c.borders,j=b.width-(i[1].width+i[3].width+e+g),k=b.height-(i[0].width+i[2].width+f+h);this.drawImage(d,0,0,d.image.width||j,d.image.height||k,b.left+e+i[3].width,b.top+f+i[0].width,j,k)},yb.prototype.renderBackground=function(a,b,c){b.height>0&&b.width>0&&(this.renderBackgroundColor(a,b),this.renderBackgroundImage(a,b,c))},yb.prototype.renderBackgroundColor=function(a,b){var c=a.css("backgroundColor");this.isTransparent(c)||this.rectangle(b.left,b.top,b.width,b.height,a.css("backgroundColor"))},yb.prototype.renderBorders=function(a){a.forEach(this.renderBorder,this)},yb.prototype.renderBorder=function(a){this.isTransparent(a.color)||null===a.args||this.drawShape(a.args,a.color)},yb.prototype.renderBackgroundImage=function(a,b,c){var d=a.parseBackgroundImages();d.reverse().forEach(function(d,e,f){switch(d.method){case"url":var g=this.images.get(d.args[0]);g?this.renderBackgroundRepeating(a,b,g,f.length-(e+1),c):A("Error loading background-image",d.args[0]);break;case"linear-gradient":case"gradient":var h=this.images.get(d.value);h?this.renderBackgroundGradient(h,b,c):A("Error loading background-image",d.args[0]);break;case"none":break;default:A("Unknown background-image type",d.args[0])}},this)},yb.prototype.renderBackgroundRepeating=function(a,b,c,d,e){var f=a.parseBackgroundSize(b,c.image,d),g=a.parseBackgroundPosition(b,c.image,d,f),h=a.parseBackgroundRepeat(d);switch(h){case"repeat-x":case"repeat no-repeat":this.backgroundRepeatShape(c,g,f,b,b.left+e[3],b.top+g.top+e[0],99999,f.height,e);break;case"repeat-y":case"no-repeat repeat":this.backgroundRepeatShape(c,g,f,b,b.left+g.left+e[3],b.top+e[0],f.width,99999,e);break;case"no-repeat":this.backgroundRepeatShape(c,g,f,b,b.left+g.left+e[3],b.top+g.top+e[0],f.width,f.height,e);break;default:this.renderBackgroundRepeat(c,g,f,{top:b.top,left:b.left},e[3],e[0])}},yb.prototype.isTransparent=function(a){return!a||"transparent"===a||"rgba(0, 0, 0, 0)"===a},zb.prototype=Object.create(B.prototype),zb.prototype.getParentStack=function(a){var b=this.parent?this.parent.stack:null;return b?b.ownStacking?b:b.getParentStack(a):a.stack},Ab.prototype.testRangeBounds=function(a){var b,c,d,e,f=!1;return a.createRange&&(b=a.createRange(),b.getBoundingClientRect&&(c=a.createElement("boundtest"),c.style.height="123px",c.style.display="block",a.body.appendChild(c),b.selectNode(c),d=b.getBoundingClientRect(),e=d.height,123===e&&(f=!0),a.body.removeChild(c))),f},Ab.prototype.testCORS=function(){return"undefined"!=typeof(new Image).crossOrigin},Ab.prototype.testSVG=function(){var a=new Image,c=b.createElement("canvas"),d=c.getContext("2d");a.src="data:image/svg+xml,";try{d.drawImage(a,0,0),c.toDataURL()}catch(e){return!1}return!0},Bb.prototype.hasFabric=function(){return html2canvas.fabric?Promise.resolve():Promise.reject(new Error("html2canvas.svg.js is not loaded, cannot render svg"))},Bb.prototype.inlineFormatting=function(a){return/^data:image\/svg\+xml;base64,/.test(a)?this.decode64(this.removeContentType(a)):this.removeContentType(a)},Bb.prototype.removeContentType=function(a){return a.replace(/^data:image\/svg\+xml(;base64)?,/,"")},Bb.prototype.isInline=function(a){return/^data:image\/svg\+xml/i.test(a)},Bb.prototype.createCanvas=function(a){var b=this;return function(c,d){var e=new html2canvas.fabric.StaticCanvas("c");b.image=e.lowerCanvasEl,e.setWidth(d.width).setHeight(d.height).add(html2canvas.fabric.util.groupSVGElements(c,d)).renderAll(),a(e.lowerCanvasEl)}},Bb.prototype.decode64=function(b){return"function"==typeof a.atob?a.atob(b):Cb(b)},Db.prototype=Object.create(Bb.prototype),Eb.prototype=Object.create(B.prototype),Eb.prototype.applyTextTransform=function(){this.node.data=this.transform(this.parent.css("textTransform"))},Eb.prototype.transform=function(a){var b=this.node.data;switch(a){case"lowercase":return b.toLowerCase();case"capitalize":return b.replace(/(^|\s|:|-|\(|\))([a-z])/g,Fb);case"uppercase":return b.toUpperCase();default:return b}},Gb.prototype=Object.create(w.prototype),Ib.prototype=Object.create(yb.prototype),Ib.prototype.setFillStyle=function(a){return this.ctx.fillStyle=a,this.ctx},Ib.prototype.rectangle=function(a,b,c,d,e){this.setFillStyle(e).fillRect(a,b,c,d)},Ib.prototype.drawShape=function(a,b){this.shape(a),this.setFillStyle(b).fill()},Ib.prototype.taints=function(a){if(null===a.tainted){this.taintCtx.drawImage(a.image,0,0);try{this.taintCtx.getImageData(0,0,1,1),a.tainted=!1}catch(c){this.taintCtx=b.createElement("canvas").getContext("2d"),a.tainted=!0}}return a.tainted},Ib.prototype.drawImage=function(a,b,c,d,e,f,g,h,i){(!this.taints(a)||this.options.allowTaint)&&this.ctx.drawImage(a.image,b,c,d,e,f,g,h,i)},Ib.prototype.clip=function(a,b,c){this.ctx.save(),a.filter(Jb).forEach(function(a){this.shape(a).clip()},this),b.call(c),this.ctx.restore()},Ib.prototype.shape=function(a){return this.ctx.beginPath(),a.forEach(function(a,b){this.ctx[0===b?"moveTo":a[0]+"To"].apply(this.ctx,a.slice(1))},this),this.ctx.closePath(),this.ctx},Ib.prototype.font=function(a,b,c,d,e,f){this.setFillStyle(a).font=[b,c,d,e,f].join(" ")},Ib.prototype.fontShadow=function(a,b,c,d){this.setVariable("shadowColor",a).setVariable("shadowOffsetY",b).setVariable("shadowOffsetX",c).setVariable("shadowBlur",d)},Ib.prototype.clearShadow=function(){this.setVariable("shadowColor","rgba(0,0,0,0)")},Ib.prototype.setOpacity=function(a){this.ctx.globalAlpha=a},Ib.prototype.setTransform=function(a){this.ctx.translate(a.origin[0],a.origin[1]),this.ctx.transform.apply(this.ctx,a.matrix),this.ctx.translate(-a.origin[0],-a.origin[1])},Ib.prototype.setVariable=function(a,b){return this.variables[a]!==b&&(this.variables[a]=this.ctx[a]=b),this},Ib.prototype.text=function(a,b,c){this.ctx.fillText(a,b,c)},Ib.prototype.backgroundRepeatShape=function(a,b,c,d,e,f,g,h,i){var j=[["line",Math.round(e),Math.round(f)],["line",Math.round(e+g),Math.round(f)],["line",Math.round(e+g),Math.round(h+f)],["line",Math.round(e),Math.round(h+f)]];this.clip([j],function(){this.renderBackgroundRepeat(a,b,c,d,i[3],i[0])},this)},Ib.prototype.renderBackgroundRepeat=function(a,b,c,d,e,f){var g=Math.round(d.left+b.left+e),h=Math.round(d.top+b.top+f);this.setFillStyle(this.ctx.createPattern(this.resizeImage(a,c),"repeat")),this.ctx.translate(g,h),this.ctx.fill(),this.ctx.translate(-g,-h)},Ib.prototype.renderBackgroundGradient=function(a,b){if(a instanceof z){var c=this.ctx.createLinearGradient(b.left+b.width*a.x0,b.top+b.height*a.y0,b.left+b.width*a.x1,b.top+b.height*a.y1);a.colorStops.forEach(function(a){c.addColorStop(a.stop,a.color)}),this.rectangle(b.left,b.top,b.width,b.height,c)}},Ib.prototype.resizeImage=function(a,c){var d=a.image;if(d.width===c.width&&d.height===c.height)return d;var e,f=b.createElement("canvas");return f.width=c.width,f.height=c.height,e=f.getContext("2d"),e.drawImage(d,0,0,d.width,d.height,0,0,c.width,c.height),f}}(window,document); \ No newline at end of file diff --git a/src/core.js b/src/core.js index 8db7410..6357bbf 100644 --- a/src/core.js +++ b/src/core.js @@ -13,6 +13,7 @@ window.html2canvas = function(nodeList, options) { options.allowTaint = typeof(options.allowTaint) === "undefined" ? false : options.allowTaint; options.removeContainer = typeof(options.removeContainer) === "undefined" ? true : options.removeContainer; options.javascriptEnabled = typeof(options.javascriptEnabled) === "undefined" ? false : options.javascriptEnabled; + options.imageTimeout = typeof(options.imageTimeout) === "undefined" ? 10000 : options.imageTimeout; if (typeof(nodeList) === "string") { if (typeof(options.proxy) !== "string") { @@ -59,7 +60,7 @@ function renderWindow(node, container, options, windowWidth, windowHeight) { var parser = new NodeParser(node, renderer, support, imageLoader, options); return parser.ready.then(function() { log("Finished rendering"); - var canvas = (options.type !== "view" && (node === clonedWindow.document.body || node === clonedWindow.document.documentElement)) ? renderer.canvas : crop(renderer.canvas, bounds); + var canvas = (options.type !== "view" && (node === clonedWindow.document.body || node === clonedWindow.document.documentElement)) ? renderer.canvas : crop(renderer.canvas, {width: width, height: height, top: bounds.top, left: bounds.left}); cleanupContainer(container, options); return canvas; }); @@ -125,10 +126,13 @@ function createWindowClone(ownerDocument, containerDocument, width, height, opti if window url is about:blank, we can assign the url to current by writing onto the document */ container.contentWindow.onload = container.onload = function() { - setTimeout(function() { - cloneCanvasContents(ownerDocument, documentClone); - resolve(container); - }, 0); + var interval = setInterval(function() { + if (documentClone.body.childNodes.length > 0) { + cloneCanvasContents(ownerDocument, documentClone); + clearInterval(interval); + resolve(container); + } + }, 50); }; documentClone.open(); @@ -150,11 +154,8 @@ function loadUrlDocument(src, proxy, document, width, height, options) { function documentFromHTML(src) { return function(html) { - var doc = document.implementation.createHTMLDocument(""); - doc.open(); - doc.write(html); - doc.close(); - + var parser = new DOMParser(); + var doc = parser.parseFromString(html, "text/html"); var b = doc.querySelector("base"); if (!b || !b.href.host) { var base = doc.createElement("base"); diff --git a/src/framecontainer.js b/src/framecontainer.js index 199aa79..18add5d 100644 --- a/src/framecontainer.js +++ b/src/framecontainer.js @@ -12,7 +12,7 @@ function FrameContainer(container, sameOrigin, options) { resolve(container); } })).then(function(container) { - return html2canvas(container.contentWindow.document.documentElement, {type: 'view', proxy: options.proxy, javascriptEnabled: options.javascriptEnabled, removeContainer: options.removeContainer}); + return html2canvas(container.contentWindow.document.documentElement, {type: 'view', width: container.width, height: container.height, proxy: options.proxy, javascriptEnabled: options.javascriptEnabled, removeContainer: options.removeContainer, allowTaint: options.allowTaint, imageTimeout: options.imageTimeout / 2}); }).then(function(canvas) { return self.image = canvas; }); diff --git a/src/imageloader.js b/src/imageloader.js index 6857da0..fe2a791 100644 --- a/src/imageloader.js +++ b/src/imageloader.js @@ -9,17 +9,17 @@ ImageLoader.prototype.findImages = function(nodes) { var images = []; nodes.reduce(function(imageNodes, container) { switch(container.node.nodeName) { - case "IMG": - return imageNodes.concat([{ - args: [container.node.src], - method: "url" - }]); - case "svg": - case "IFRAME": - return imageNodes.concat([{ - args: [container.node], - method: container.node.nodeName - }]); + case "IMG": + return imageNodes.concat([{ + args: [container.node.src], + method: "url" + }]); + case "svg": + case "IFRAME": + return imageNodes.concat([{ + args: [container.node], + method: container.node.nodeName + }]); } return imageNodes; }, []).forEach(this.addImage(images, this.loadImage), this); @@ -94,7 +94,7 @@ ImageLoader.prototype.isSameOrigin = function(url) { }; ImageLoader.prototype.getPromise = function(container) { - return container.promise['catch'](function() { + return this.timeout(container, this.options.imageTimeout)['catch'](function() { var dummy = new DummyImageContainer(container.src); return dummy.promise.then(function(image) { container.image = image; @@ -113,12 +113,25 @@ ImageLoader.prototype.fetch = function(nodes) { this.images = nodes.reduce(bind(this.findBackgroundImage, this), this.findImages(nodes)); this.images.forEach(function(image, index) { image.promise.then(function() { - log("Succesfully loaded image #"+ (index+1)); + log("Succesfully loaded image #"+ (index+1), image); }, function(e) { - log("Failed loading image #"+ (index+1), e); + log("Failed loading image #"+ (index+1), image, e); }); }); - this.ready = Promise.all(this.images.map(this.getPromise)); + this.ready = Promise.all(this.images.map(this.getPromise, this)); log("Finished searching images"); return this; }; + +ImageLoader.prototype.timeout = function(container, timeout) { + var timer; + return Promise.race([container.promise, new Promise(function(res, reject) { + timer = setTimeout(function() { + log("Timed out loading image", container); + reject(container); + }, timeout); + })]).then(function(container) { + clearTimeout(timer); + return container; + }); +}; diff --git a/src/nodeparser.js b/src/nodeparser.js index 5ed99d6..f7f1cae 100644 --- a/src/nodeparser.js +++ b/src/nodeparser.js @@ -18,7 +18,7 @@ function NodeParser(element, renderer, support, imageLoader, options) { return container.visible = container.isElementVisible(); }).map(this.getPseudoElements, this)); this.fontMetrics = new FontMetrics(); - log("Fetched nodes"); + log("Fetched nodes, total:", this.nodes.length); this.images = imageLoader.fetch(this.nodes.filter(isElement)); this.ready = this.images.ready.then(bind(function() { log("Images loaded, starting parsing"); diff --git a/src/renderers/canvas.js b/src/renderers/canvas.js index 25aa6a2..42d4f24 100644 --- a/src/renderers/canvas.js +++ b/src/renderers/canvas.js @@ -7,7 +7,7 @@ function CanvasRenderer(width, height) { this.taintCtx = this.document.createElement("canvas").getContext("2d"); this.ctx.textBaseline = "bottom"; this.variables = {}; - log("Initialized CanvasRenderer"); + log("Initialized CanvasRenderer with size", width, "x", height); } CanvasRenderer.prototype = Object.create(Renderer.prototype);