html2canvas/dist/html2canvas.min.js

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2014-09-01 21:22:56 +04:00
/*
html2canvas 0.5.0-alpha <http://html2canvas.hertzen.com>
Copyright (c) 2014 Niklas von Hertzen
Released under MIT License
*/
!function(a,b,c){function d(a,b,c,d){return i(a,a,c,d,b).then(function(h){u("Document cloned");var i="["+Cb+"='true']";a.querySelector(i).removeAttribute(Cb);var j=h.contentWindow,k=j.document.querySelector(i),l=new tb(j.document),m=new s(b,l),n=C(k),o=null!=b.width?b.width:"view"===b.type?Math.min(n.width,c):f(j.document),p=null!=b.height?b.height:"view"===b.type?Math.min(n.height,d):g(j.document),q=new Bb(o,p,m,b,a),r=new E(k,q,l,m,b);return r.ready.then(function(){u("Finished rendering");var a="view"===b.type||k!==j.document.body&&k!==j.document.documentElement?e(q.canvas,n):q.canvas;return b.removeContainer&&(h.parentNode.removeChild(h),u("Cleaned up container")),a})})}function e(a,c){var d=b.createElement("canvas"),e=Math.min(a.width-1,Math.max(0,c.left)),f=Math.min(a.width,Math.max(1,c.left+c.width)),g=Math.min(a.height-1,Math.max(0,c.top)),h=Math.min(a.height,Math.max(1,c.top+c.height)),i=d.width=f-e,j=d.height=h-g;return u("Cropping canvas at:","left:",c.left,"top:",c.top,"width:",c.width,"height:",c.height),u("Resulting crop with width",i,"and height",j," with x",e,"and y",g),d.getContext("2d").drawImage(a,e,g,i,j,0,0,i,j),d}function f(a){return Math.max(Math.max(a.body.scrollWidth,a.documentElement.scrollWidth),Math.max(a.body.offsetWidth,a.documentElement.offsetWidth),Math.max(a.body.clientWidth,a.documentElement.clientWidth))}function g(a){return Math.max(Math.max(a.body.scrollHeight,a.documentElement.scrollHeight),Math.max(a.body.offsetHeight,a.documentElement.offsetHeight),Math.max(a.body.clientHeight,a.documentElement.clientHeight))}function h(){return"data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7"}function i(b,c,d,e,f){var g=b.documentElement.cloneNode(!0),h=c.createElement("iframe");return h.style.visibility="hidden",h.style.position="absolute",h.style.left=h.style.top="-10000px",h.width=d,h.height=e,h.scrolling="no",c.body.appendChild(h),new Promise(function(b){var c=h.contentWindow.document;h.contentWindow.onload=h.onload=function(){b(h)},c.open(),c.write("<!DOCTYPE html>"),c.close(),c.replaceChild(j(c.adoptNode(g)),c.documentElement),"view"===f.type&&h.contentWindow.scrollTo(a.pageXOffset,a.pageYOffset)})}function j(a){return[].slice.call(a.childNodes,0).filter(k).forEach(function(b){"SCRIPT"===b.tagName?a.removeChild(b):j(b)}),a}function k(a){return a.nodeType===Node.ELEMENT_NODE}function l(a){if(this.src=a,u("DummyImageContainer for",a),!this.promise||!this.image){u("Initiating DummyImageContainer"),l.prototype.image=new Image;var b=this.image;l.prototype.promise=new Promise(function(a,c){b.onload=a,b.onerror=c,b.src=h(),b.complete===!0&&a(b)})}}function m(a,c){var d,e,f=b.createElement("div"),g=b.createElement("img"),i=b.createElement("span"),j="Hidden Text";f.style.visibility="hidden",f.style.fontFamily=a,f.style.fontSize=c,f.style.margin=0,f.style.padding=0,b.body.appendChild(f),g.src=h(),g.width=1,g.height=1,g.style.margin=0,g.style.padding=0,g.style.verticalAlign="baseline",i.style.fontFamily=a,i.style.fontSize=c,i.style.margin=0,i.style.padding=0,i.appendChild(b.createTextNode(j)),f.appendChild(i),f.appendChild(g),d=g.offsetTop-i.offsetTop+1,f.removeChild(i),f.appendChild(b.createTextNode(j)),f.style.lineHeight="normal",g.style.verticalAlign="super",e=g.offsetTop-f.offsetTop+1,b.body.removeChild(f),this.baseline=d,this.lineWidth=1,this.middle=e}function n(){this.data={}}function o(a,b,c){this.image=null,this.src=a;var d=this,e=C(a);this.promise=(b?new Promise(function(b){"about:blank"===a.contentWindow.document.URL||null==a.contentWindow.document.documentElement?a.contentWindow.onload=a.onload=function(){b(a)}:b(a)}):this.proxyLoad(c,e)).then(function(a){return html2canvas(a.contentWindow.document.documentElement,{type:"view",proxy:c})}).then(function(a){return d.image=a})}function p(a){return function(c){var d=b.implementation.createHTMLDocument("");d.open(),d.write(c),d.close();var e=d.querySelector("base");if(!e||!e.href.host){var f=d.createElement("base");f.href=a.src,d.head.insertBefore(f,d.head.firstChild)}return d}}function q(a){this.src=a.value,this.co
},this),0)},E.prototype.createPseudoHideStyles=function(a){var b=a.createElement("style");b.innerHTML="."+this.pseudoHideClass+':before { content: "" !important; display: none !important; }.'+this.pseudoHideClass+':after { content: "" !important; display: none !important; }',a.body.appendChild(b)},E.prototype.getPseudoElements=function(a){var b=[[a]];if(a.node.nodeType===Node.ELEMENT_NODE){var c=this.getPseudoElement(a,":before"),d=this.getPseudoElement(a,":after");c&&(a.node.insertBefore(c[0].node,a.node.firstChild),b.push(c)),d&&(a.node.appendChild(d[0].node),b.push(d)),(c||d)&&(a.node.className+=" "+this.pseudoHideClass)}return gb(b)},E.prototype.getPseudoElement=function(a,c){var d=a.computedStyle(c);if(!d||!d.content||"none"===d.content||"-moz-alt-content"===d.content||"none"===d.display)return null;for(var e=hb(d.content),f="url"===e.substr(0,3),g=b.createElement(f?"img":"html2canvaspseudoelement"),h=new v(g,a),i=d.length-1;i>=0;i--){var j=F(d.item(i));g.style[j]=d[j]}if(g.className=this.pseudoHideClass,f)return g.src=z(e)[0].args[0],[h];var k=b.createTextNode(e);return g.appendChild(k),[h,new xb(k,h)]},E.prototype.getChildren=function(a){return gb([].filter.call(a.node.childNodes,U).map(function(b){var c=[b.nodeType===Node.TEXT_NODE?new xb(b,a):new v(b,a)].filter(fb);return b.nodeType===Node.ELEMENT_NODE&&c.length&&"TEXTAREA"!==b.tagName?c[0].isElementVisible()?c.concat(this.getChildren(c[0])):[]:c},this))},E.prototype.newStackingContext=function(a,b){var c=new sb(b,a.cssFloat("opacity"),a.node,a.parent);c.visible=a.visible;var d=b?c.getParentStack(this):c.parent.stack;d.contexts.push(c),a.stack=c},E.prototype.createStackingContexts=function(){this.nodes.forEach(function(a){$(a)&&(this.isRootElement(a)||bb(a)||V(a)||this.isBodyWithTransparentRoot(a)||a.hasTransform())?this.newStackingContext(a,!0):$(a)&&(W(a)&&O(a)||Y(a)||X(a))?this.newStackingContext(a,!1):a.assignStack(a.parent.stack)},this)},E.prototype.isBodyWithTransparentRoot=function(a){return"BODY"===a.node.nodeName&&this.renderer.isTransparent(a.parent.css("backgroundColor"))},E.prototype.isRootElement=function(a){return null===a.parent},E.prototype.sortStackingContexts=function(a){a.contexts.sort(ab),a.contexts.forEach(this.sortStackingContexts,this)},E.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{}}},E.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?D(c):C(c);return d.replaceChild(e,c),f},E.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()},E.prototype.parse=function(a){var b=a.contexts.filter(M),c=a.children.filter($),d=c.filter(Z(X)),e=d.filter(Z(W)).filter(Z(P)),f=c.filter(Z(W)).filter(X),g=d.filter(Z(W)).filter(P),h=a.contexts.concat(d.filter(W)).filter(O),i=a.children.filter(_).filter(R),j=a.contexts.filter(N);b.concat(e).concat(f).concat(g).concat(h).concat(i).concat(j).forEach(function(a){this.renderQueue.push(a),Q(a)&&(this.parse(a),this.renderQueue.push(new G))},this)},E.prototype.paint=function(a){try{a instanceof G?this.renderer.ctx.restore():_(a)?this.paintText(a):this.paintNode(a)}catch(b){u(b)}},E.prototype.paintNode=function(a){Q(a)&&(this.renderer.setOpacity(a.opacity),this.renderer.ctx.save(),a.hasTransform()&&this.renderer.setTransform(a.parseTransform()));var b=a.parseBounds(),c=this.parseBorders(a);switch(this.renderer.clip(c.clip,function(){this.renderer.renderBackground(a,b,c.borders.map(eb))},this),this.r