html2canvas/build/html2canvas.min.js

/* 
 * html2canvas v0.20 <http://html2canvas.hertzen.com>
 * Copyright (c) 2011 Niklas von Hertzen. All rights reserved.
 * http://www.twitter.com/niklasvh 
 * 
 * Released under MIT License
 */

function html2canvas(a,b){this.opts=this.extendObj(b||{},{logging:!1,ready:function(a){document.body.appendChild(a.canvas)},iframeDefault:"default",flashCanvasPath:"http://html2canvas.hertzen.com/external/flashcanvas/flashcanvas.js",renderViewport:!1,reorderZ:!0,throttle:!0,letterRendering:!1,renderOrder:"canvas flash html"});this.element=a;this.imagesLoaded=0;this.images=[];this.fontData=[];this.numDraws=0;this.contextStacks=[];this.ignoreElements="IFRAME|OBJECT|PARAM";this.needReorder=!1;this.blockElements=
/(BR|PARAM)/;this.ignoreRe=RegExp("("+this.ignoreElements+")");this.support={rangeBounds:!1};if(document.createRange){var c=document.createRange();if(c.getBoundingClientRect){var d=document.createElement("boundtest");d.style.height="123px";d.style.display="block";document.getElementsByTagName("body")[0].appendChild(d);c.selectNode(d);if(c.getBoundingClientRect().height==123)this.support.rangeBounds=!0;document.getElementsByTagName("body")[0].removeChild(d)}}this.init();return this}
html2canvas.prototype.init=function(){var a=this;this.log("Finding background images");this.getImages(this.element);this.log("Finding images");this.each(document.images,function(b,c){a.preloadImage(a.getAttr(c,"src"))});this.images.length==0&&this.start()};
html2canvas.prototype.start=function(){if(this.images.length==0||this.imagesLoaded==this.images.length/2){this.log("Started parsing");this.bodyOverflow=document.getElementsByTagName("body")[0].style.overflow;document.getElementsByTagName("body")[0].style.overflow="hidden";var a=new this.storageContext($(document).width(),$(document).height());a.opacity=this.getCSS(this.element,"opacity");this.parseElement(this.element,this.newElement(this.element,a))}};
html2canvas.prototype.stackingContext=function(a){this.canvas=document.createElement("canvas");this.canvas.width=a;this.canvas.height=a;if(this.canvas.getContext)this.ctx=this.canvas.getContext("2d");this.ctx.textBaseline="bottom";return this.ctx};
html2canvas.prototype.storageContext=function(a,b){this.storage=[];this.width=a;this.height=b;this.fillRect=function(a,b,e,f){this.storage.push({type:"function",name:"fillRect",arguments:[a,b,e,f]})};this.drawImage=function(a,b,e,f,g,k,i,j,h){this.storage.push({type:"function",name:"drawImage",arguments:[a,b,e,f,g,k,i,j,h]})};this.fillText=function(a,b,e){this.storage.push({type:"function",name:"fillText",arguments:[a,b,e]})};return this};
html2canvas.prototype.finish=function(){this.log("Finished rendering");document.getElementsByTagName("body")[0].style.overflow=this.bodyOverflow;this.opts.ready(this)};
html2canvas.prototype.drawBackground=function(a,b,c){var d=this.getCSS(a,"background-image"),e=this.getCSS(a,"background-repeat");if(typeof d!="undefined"&&/^(1|none)$/.test(d)==!1){var d=this.backgroundImageUrl(d),f=this.loadImage(d),a=this.getBackgroundPosition(a,b,f);if(f)switch(e){case "repeat-x":this.drawbackgroundRepeatX(c,f,a,b.left,b.top,b.width,b.height);break;case "repeat-y":this.drawbackgroundRepeatY(c,f,a,b.left,b.top,b.width,b.height);break;case "no-repeat":this.drawBackgroundRepeat(c,
f,a.left+b.left,a.top+b.top,Math.min(b.width,f.width),Math.min(b.height,f.height),b.left,b.top);break;default:var g;a.top-=Math.ceil(a.top/f.height)*f.height;for(d=b.top+a.top;d<b.height+b.top;)e=Math.min(f.height,b.height+b.top-d),e=Math.floor(d+f.height)>e+d?e+d-d:f.height,d<b.top?(g=b.top-d,d=b.top):g=0,this.drawbackgroundRepeatX(c,f,a,b.left,d,b.width,e),g>0&&(a.top+=g),d=Math.floor(d+f.height)-g}else this.log("Error loading background:"+d)}};
html2canvas.prototype.backgroundImageUrl=function(a){a.substr(0,5)=='url("'?(a=a.substr(5),a=a.substr(0,a.length-2)):(a=a.substr(4),a=a.substr(0,a.length-1));return a};
html2canvas.prototype.getBackgroundPosition=function(a,b,c){var a=(this.getCSS(a,"backgroundPosition")||"0 0").split(" "),d,e;a.length==1&&(d=a,a=[],a[0]=d,a[1]=d);a[0].toString().indexOf("%")!=-1?(e=parseFloat(a[0])/100,d=b.width*e-c.width*e):d=parseInt(a[0],10);a[1].toString().indexOf("%")!=-1?(e=parseFloat(a[1])/100,b=b.height*e-c.height*e):b=parseInt(a[1],10);return{top:b,left:d}};
html2canvas.prototype.drawbackgroundRepeatY=function(a,b,c,d,e,f,g){var k=Math.min(b.width,f),i;c.top-=Math.ceil(c.top/b.height)*b.height;for(i=e+c.top;i<g+e;)f=Math.floor(i+b.height)>g+e?g+e-i:b.height,this.drawBackgroundRepeat(a,b,d+c.left,i,k,f,d,e),i=Math.floor(i+b.height)};
html2canvas.prototype.drawbackgroundRepeatX=function(a,b,c,d,e,f,g){var g=Math.min(b.height,g),k,i;c.left-=Math.ceil(c.left/b.width)*b.width;for(i=d+c.left;i<f+d;)k=Math.floor(i+b.width)>f+d?f+d-i:b.width,this.drawBackgroundRepeat(a,b,i,e+c.top,k,g,d,e),i=Math.floor(i+b.width)};html2canvas.prototype.drawBackgroundRepeat=function(a,b,c,d,e,f,g,k){var i=0,j=0;g-c>0&&(i=g-c);k-d>0&&(j=k-d);this.drawImage(a,b,i,j,e-i,f-j,c+i,d+j,e-i,f-j)};
html2canvas.prototype.getBorderData=function(a){var b=[],c=this;this.each(["top","right","bottom","left"],function(d,e){b.push({width:parseInt(c.getCSS(a,"border-"+e+"-width"),10),color:c.getCSS(a,"border-"+e+"-color")})});return b};
html2canvas.prototype.drawBorders=function(a,b,c,d,e,f){var g=this.getBorderData(a),k=this;this.each(g,function(a,j){if(j.width>0){var h=c,l=d,m=e,n=f-g[2].width;switch(a){case 0:n=g[0].width;break;case 1:h=c+e-g[1].width;m=g[1].width;break;case 2:l=l+f-g[2].width;n=g[2].width;break;case 3:m=g[3].width}k.newRect(b,h,l,m,n,j.color)}});return g};
html2canvas.prototype.newElement=function(a,b){var c=this.getBounds(a),d=c.left,e=c.top,f=c.width,g=c.height,k=this.getCSS(a,"background-color"),b=b||{},i=this.formatZ(this.getCSS(a,"zIndex"),this.getCSS(a,"position"),b.zIndex,a.parentNode),j=this.getCSS(a,"opacity"),h={ctx:new this.storageContext,zIndex:i,opacity:j*b.opacity},i=this.contextStacks.push(h),j=this.contextStacks[i-1].ctx;this.setContextVariable(j,"globalAlpha",h.opacity);h=this.drawBorders(a,j,c.left,c.top,c.width,c.height);this.ignoreRe.test(a.nodeName)&&
this.opts.iframeDefault!="transparent"&&(k=this.opts.iframeDefault=="default"?"#efefef":this.opts.iframeDefault);this.newRect(j,d+h[3].width,e+h[0].width,f-(h[1].width+h[3].width),g-(h[0].width+h[2].width),k);this.drawBackground(a,{left:d+h[3].width,top:e+h[0].width,width:f-(h[1].width+h[3].width),height:g-(h[0].width+h[2].width)},j);a.nodeName=="IMG"&&((f=this.loadImage(this.getAttr(a,"src")))?this.drawImage(j,f,0,0,f.width,f.height,d+parseInt(this.getCSS(a,"padding-left"),10)+h[3].width,e+parseInt(this.getCSS(a,
"padding-top"),10)+h[0].width,c.width-(h[1].width+h[3].width+parseInt(this.getCSS(a,"padding-left"),10)+parseInt(this.getCSS(a,"padding-right"),10)),c.height-(h[0].width+h[2].width+parseInt(this.getCSS(a,"padding-top"),10)+parseInt(this.getCSS(a,"padding-bottom"),10))):this.log("Error loading <img>:"+this.getAttr(a,"src")));return this.contextStacks[i-1]};html2canvas.prototype.printText=function(a,b,c,d){this.trim(a).length>0&&(d.fillText(a,b,c),this.numDraws++)};
html2canvas.prototype.newRect=function(a,b,c,d,e,f){f!="transparent"&&(this.setContextVariable(a,"fillStyle",f),a.fillRect(b,c,d,e),this.numDraws++)};html2canvas.prototype.drawImage=function(a,b,c,d,e,f,g,k,i,j){a.drawImage(b,c,d,e,f,g,k,i,j);this.numDraws++};
html2canvas.prototype.getImages=function(a){var b=this;this.ignoreRe.test(a.nodeName)||this.each($(a).contents(),function(a,d){RegExp("("+this.ignoreElements+")").test(d.nodeName)||b.getImages(d)});if(a.nodeType==1||typeof a.nodeType=="undefined")(a=this.getCSS(a,"background-image"))&&a!="1"&&a!="none"&&a.substring(0,7)!="-webkit"&&a.substring(0,4)!="-moz"&&this.preloadImage(this.backgroundImageUrl(a))};
html2canvas.prototype.loadImage=function(a){a=this.getIndex(this.images,a);return a!=-1?this.images[a+1]:!1};html2canvas.prototype.preloadImage=function(a){if(this.getIndex(this.images,a)==-1){this.images.push(a);var b=new Image,c=this;$(b).load(function(){c.imagesLoaded++;c.start()});b.onerror=function(){c.images.splice(c.images.indexOf(b.src),2);c.imagesLoaded++;c.start()};b.src=a;this.images.push(b)}};
html2canvas.prototype.Renderer=function(a){var b=this;this.each(this.opts.renderOrder.split(" "),function(c,d){switch(d){case "canvas":if(b.canvas=document.createElement("canvas"),b.canvas.getContext)return b.canvasRenderer(a),!1}})};
html2canvas.prototype.canvasRenderer=function(a){var b=this,a=this.sortQueue(a);this.canvas.width=$(document).width();this.canvas.height=$(document).height();this.ctx=this.canvas.getContext("2d");this.ctx.textBaseline="bottom";this.each(a,function(a,d){d.ctx.storage&&b.each(d.ctx.storage,function(a,c){switch(c.type){case "variable":b.ctx[c.name]=c.arguments;break;case "function":c.name=="fillRect"?b.ctx.fillRect(c.arguments[0],c.arguments[1],c.arguments[2],c.arguments[3]):c.name=="fillText"?b.ctx.fillText(c.arguments[0],
c.arguments[1],c.arguments[2]):c.name=="drawImage"?b.ctx.drawImage(c.arguments[0],c.arguments[1],c.arguments[2],c.arguments[3],c.arguments[4],c.arguments[5],c.arguments[6],c.arguments[7],c.arguments[8]):this.log(c)}})})};
html2canvas.prototype.sortQueue=function(a){if(!this.opts.reorderZ||!this.needReorder)return a;var b=0;this.each(a,function(a,c){if(b<c.zIndex.length)b=c.zIndex.length});var c=0;this.each(a,function(d,e){for(var f=a.length.toString().length-c.toString().length;b>e.zIndex.length;)e.zIndex+="0";for(e.zIndex+=c;b+f+c.toString().length>e.zIndex.length;)e.zIndex+="0";c++});return a=a.sort(function(a,b){return a.zIndex<b.zIndex?-1:a.zIndex>b.zIndex?1:0})};
html2canvas.prototype.setContextVariable=function(a,b,c){a.storage?a.storage.push({type:"variable",name:b,arguments:c}):a[b]=c};
html2canvas.prototype.newText=function(a,b,c){var d=this.getCSS(a,"font-family"),e=this.getCSS(a,"font-size"),f=this.getCSS(a,"color"),g=this.getCSS(a,"font-weight"),k=this.getCSS(a,"font-style"),i=this.getCSS(a,"font-variant"),j=this.getCSS(a,"text-decoration"),h=this.getCSS(a,"text-align"),l=this.getCSS(a,"letter-spacing");b.nodeValue=this.textTransform(b.nodeValue,this.getCSS(a,"text-transform"));if(this.trim(b.nodeValue).length>0){switch(g){case "401":g="bold"}if(j!="none")var m=this.fontMetrics(d,
e);a=i+" "+g+" "+k+" "+e+" "+d;h=h.replace(["-webkit-auto"],["auto"]);h=this.opts.letterRendering==!1&&/^(left|right|justify|auto)$/.test(h)&&/^(normal|none)$/.test(l)?b.nodeValue.split(/(\b| )/):b.nodeValue.split("");this.setContextVariable(c,"fillStyle",f);this.setContextVariable(c,"font",a);for(l=0;l<h.length;l++){a=b.splitText(h[l].length);this.support.rangeBounds?(document.createRange?(d=document.createRange(),d.selectNode(b)):d=document.body.createTextRange(),d=d.getBoundingClientRect()?d.getBoundingClientRect():
{}):(e=b.parentNode,g=document.createElement("wrapper"),k=b.cloneNode(!0),g.appendChild(b.cloneNode(!0)),e.replaceChild(g,b),d=this.getBounds(g),e.replaceChild(k,g));this.printText(b.nodeValue,d.left,d.bottom,c);switch(j){case "underline":this.newRect(c,d.left,Math.round(d.top+m.baseline+m.lineWidth),d.width,1,f);break;case "overline":this.newRect(c,d.left,d.top,d.width,1,f);break;case "line-through":this.newRect(c,d.left,Math.ceil(d.top+m.middle+m.lineWidth),d.width,1,f)}b=a}}};
html2canvas.prototype.fontMetrics=function(a,b){var c=this.fontData.indexOf(a+"-"+b);if(c>-1)return this.fontData[c+1];c=document.createElement("div");document.getElementsByTagName("body")[0].appendChild(c);$(c).css({visibility:"hidden",fontFamily:a,fontSize:b,margin:0,padding:0});var d=document.createElement("img");d.src="http://html2canvas.hertzen.com/images/8.jpg";d.width=1;d.height=1;$(d).css({margin:0,padding:0});var e=document.createElement("span");$(e).css({fontFamily:a,fontSize:b,margin:0,
padding:0});e.appendChild(document.createTextNode("Hidden Text"));c.appendChild(e);c.appendChild(d);var f=d.offsetTop-e.offsetTop+1;c.removeChild(e);c.appendChild(document.createTextNode("Hidden Text"));$(c).css("line-height","normal");$(d).css("vertical-align","super");d={baseline:f,lineWidth:1,middle:d.offsetTop-c.offsetTop+1};this.fontData.push(a+"-"+b);this.fontData.push(d);$(c).remove();return d};
html2canvas.prototype.textTransform=function(a,b){switch(b){case "lowercase":return a.toLowerCase();case "capitalize":return a.replace(/(^|\s|:|-|\(|\))([a-z])/g,function(a,b,e){return b+e.toUpperCase()});case "uppercase":return a.toUpperCase();default:return a}};html2canvas.prototype.trim=function(a){return a.replace(/^\s*/,"").replace(/\s*$/,"")};html2canvas.prototype.parseElement=function(a,b){var c=this;this.each(a.children,function(a,e){c.parsing(e,b)});this.Renderer(this.contextStacks);this.finish()};
html2canvas.prototype.parsing=function(a,b){if(this.getCSS(a,"display")!="none"&&this.getCSS(a,"visibility")!="hidden"){var c=this,b=this.newElement(a,b)||b,d=b.ctx;if(!this.ignoreRe.test(a.nodeName)){var e=this.contentsInZ(a);e.length==1?e[0].nodeType==1?this.parsing(e[0],b):e[0].nodeType==3&&this.newText(a,e[0],b.ctx):this.each(e,function(e,g){g.nodeType==1?c.parsing(g,b):g.nodeType==3&&c.newText(a,g,d)})}}};html2canvas.prototype.log=function(){};
html2canvas.prototype.getBounds=function(a){window.scroll(0,0);if(a.getBoundingClientRect)return a=a.getBoundingClientRect(),a.top=a.top,a.left=a.left,a;else{var b=$(a).offset();return{left:b.left+parseInt(this.getCSS(a,"border-left-width"),10),top:b.top+parseInt(this.getCSS(a,"border-top-width"),10),width:$(a).innerWidth(),height:$(a).innerHeight()}}};html2canvas.prototype.each=function(a,b){for(var b=b||function(){},c=0;c<a.length;c++)if(b(c,a[c])===!1)break};html2canvas.prototype.contentsInZ=function(a){return $(a).contents()};
html2canvas.prototype.getAttr=function(a,b){return a.getAttribute(b)};html2canvas.prototype.extendObj=function(a,b){for(var c in a)b[c]=a[c];return b};html2canvas.prototype.leadingZero=function(a,b){var c="000000000"+a;return c.substr(c.length-b)};
html2canvas.prototype.formatZ=function(a,b,c,d){c||(c="0");if(b!="static"&&c.charAt(0)=="0")this.needReorder=!0,c="1"+c.slice(1);if(a=="auto")if(a=this.getCSS(d,"position"),a!="static"&&typeof a!="undefined")a=0;else return c;b=this.leadingZero(this.numDraws,9);a=this.leadingZero(a+1,9);return c+""+a+""+b};html2canvas.prototype.getContents=function(a){return a.nodeName=="iframe"?a.contentDocument||a.contentWindow.document:a.childNodes};html2canvas.prototype.getCSS=function(a,b){return $(a).css(b)};
html2canvas.prototype.getIndex=function(a,b){if(a.indexOf)return a.indexOf(b);else{for(var c=0;c<a.length;c++)if(this[c]==b)return c;return-1}};