mirror of
https://github.com/niklasvh/html2canvas.git
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8 lines
39 KiB
JavaScript
8 lines
39 KiB
JavaScript
/*
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html2canvas 0.5.0-alpha <http://html2canvas.hertzen.com>
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Copyright (c) 2014 Niklas von Hertzen
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Released under MIT License
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*/
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!function(a,b,c){function d(a,b,c,d){return i(a,c,d,b).then(function(h){u("Document cloned");var i="["+qb+"='true']";a.querySelector(i).removeAttribute(qb);var j=h.contentWindow,k=j.document.querySelector(i),l=new mb(j.document),m=new q(b,l),n=C(k),o="view"===b.type?Math.min(n.width,c):f(),p="view"===b.type?Math.min(n.height,d):g(),r=new kb(o,p,m),s=new E(k,r,l,m,b);return s.ready.then(function(){return u("Finished rendering"),b.removeContainer&&h.parentNode.removeChild(h),"view"===b.type||k!==j.document.body&&k!==j.document.documentElement?e(r.canvas,n):r.canvas})})}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 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Promise(function(d,e){c.image.onload=d,c.image.onerror=e,b&&(c.image.crossOrigin="anonymous"),c.image.src=a,c.image.complete===!0&&d(c.image)})["catch"](function(){var b=new l(a);return b.promise.then(function(a){c.image=a})})}function q(b,c){this.link=null,this.options=b,this.support=c,this.origin=a.location.protocol+a.location.hostname+a.location.port}function r(a){return"IMG"===a.node.nodeName}function s(a){return{args:[a.node.src],method:"url"}}function t(a){o.apply(this,arguments),this.type=this.TYPES.LINEAR;var b=null===a.args[0].match(this.stepRegExp);b?a.args[0].split(" ").reverse().forEach(function(a){switch(a){case"left":this.x0=0,this.x1=1;break;case"top":this.y0=0,this.y1=1;break;case"right":this.x0=1,this.x1=0;break;case"bottom":this.y0=1,this.y1=0;break;case"to":var b=this.y0,c=this.x0;this.y0=this.y1,this.x0=this.x1,this.x1=c,this.y1=b;break;default:var d=a.match(this.angleRegExp);if(d)switch(d[2]){case"deg":var e=parseFloat(d[1]),f=e/(180/Math.PI),g=Math.tan(f);this.y0=2/Math.tan(g)/2,this.x0=0,this.x1=1,this.y1=0}}},this):(this.y0=0,this.y1=1),this.colorStops=a.args.slice(b?1:0).map(function(a){var b=a.match(this.stepRegExp);return{color:b[1],stop:"%"===b[3]?b[2]/100:null}},this),null===this.colorStops[0].stop&&(this.colorStops[0].stop=0),null===this.colorStops[this.colorStops.length-1].stop&&(this.colorStops[this.colorStops.length-1].stop=1),this.colorStops.forEach(function(a,b){null===a.stop&&this.colorStops.slice(b).some(function(c,d){return null!==c.stop?(a.stop=(c.stop-this.colorStops[b-1].stop)/(d+1)+this.colorStops[b-1].stop,!0):!1},this)},this)}function u(){a.html2canvas.logging&&a.console&&a.console.log&&Function.prototype.bind.call(a.console.log,a.console).apply(a.console,[Date.now()-a.html2canvas.start+"ms","html2canvas:"].concat([].slice.call(arguments,0)))}function v(a,b){this.node=a,this.parent=b,this.stack=null,this.bounds=null,this.offsetBounds=null,this.visible=null,this.computedStyles=null,this.styles={},this.backgroundImages=null,this.transformData=null,this.transformMatrix=null}function w(a){var b=a.options[a.selectedIndex||0];return b?b.text||"":""}function x(a){return a&&"matrix"===a[1]?a[2].split(",").map(function(a){return parseFloat(a.trim())}):void 0}function y(a){return-1!==a.toString().indexOf("%")}function z(a){var b,c,d,e,f,g,h,i=" \r\n ",j=[],k=0,l=0,m=function(){b&&('"'===c.substr(0,1)&&(c=c.substr(1,c.length-2)),c&&h.push(c),"-"===b.substr(0,1)&&(e=b.indexOf("-",1)+1)>0&&(d=b.substr(0,e),b=b.substr(e)),j.push({prefix:d,method:b.toLowerCase(),value:f,args:h,image:null})),h=[],b=d=c=f=""};return h=[],b=d=c=f="",a.split("").forEach(function(a){if(!(0===k&&i.indexOf(a)>-1)){switch(a){case'"':g?g===a&&(g=null):g=a;break;case"(":if(g)break;if(0===k)return k=1,void(f+=a);l++;break;case")":if(g)break;if(1===k){if(0===l)return 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gb([].filter.call(a.node.childNodes,U).map(function(b){var c=[b.nodeType===Node.TEXT_NODE?new nb(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 lb(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.renderer.renderBorders(c.borders),a.node.nodeName){case"IMG":var d=this.images.get(a.node.src);d?this.renderer.renderImage(a,b,c,d.image):u("Error loading <img>",a.node.src);break;case"SELECT":case"INPUT":case"TEXTAREA":this.paintFormValue(a)}},E.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){u("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 nb(c.firstChild,a)),b.body.removeChild(c)}},E.prototype.paintText=function(a){a.applyTextTransform();var b=a.node.data.split(!this.options.letterRendering||S(a)?/(\b| )/:""),c=a.parent.fontWeight(),d=a.parent.css("fontSize"),e=a.parent.css("fontFamily"),f=a.parent.parseTextShadows();this.renderer.font(a.parent.css("color"),a.parent.css("fontStyle"),a.parent.css("fontVariant"),c,d,e),f.length?this.renderer.fontShadow(f[0].color,f[0].offsetX,f[0].offsetY,f[0].blur):this.renderer.clearShadow(),b.map(this.parseTextBounds(a),this).forEach(function(c,f){c&&(this.renderer.text(b[f],c.left,c.bottom),this.renderTextDecoration(a.parent,c,this.fontMetrics.getMetrics(e,d)))},this)},E.prototype.renderTextDecoration=function(a,b,c){switch(a.css("textDecoration").split(" ")[0]){case"underline":this.renderer.rectangle(b.left,Math.round(b.top+c.baseline+c.lineWidth),b.width,1,a.css("color"));break;case"overline":this.renderer.rectangle(b.left,Math.round(b.top),b.width,1,a.css("color"));break;case"line-through":this.renderer.rectangle(b.left,Math.ceil(b.top+c.middle+c.lineWidth),b.width,1,a.css("color"))}},E.prototype.parseBorders=function(a){var b=a.bounds,c=T(a),d=["Top","Right","Bottom","Left"].map(function(b){return{width:a.cssInt("border"+b+"Width"),color:a.css("border"+b+"Color"),args:null}
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}),e=I(b,c,d);return{clip:this.parseBackgroundClip(a,e,d,c,b),borders:d.map(function(a,f){if(a.width>0){var g=b.left,h=b.top,i=b.width,j=b.height-d[2].width;switch(f){case 0:j=d[0].width,a.args=K({c1:[g,h],c2:[g+i,h],c3:[g+i-d[1].width,h+j],c4:[g+d[3].width,h+j]},c[0],c[1],e.topLeftOuter,e.topLeftInner,e.topRightOuter,e.topRightInner);break;case 1:g=b.left+b.width-d[1].width,i=d[1].width,a.args=K({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=K({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=K({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})}},E.prototype.parseBackgroundClip=function(a,b,c,d,e){var f=a.css("backgroundClip"),g=[];switch(f){case"content-box":case"padding-box":L(g,d[0],d[1],b.topLeftInner,b.topRightInner,e.left+c[3].width,e.top+c[0].width),L(g,d[1],d[2],b.topRightInner,b.bottomRightInner,e.left+e.width-c[1].width,e.top+c[0].width),L(g,d[2],d[3],b.bottomRightInner,b.bottomLeftInner,e.left+e.width-c[1].width,e.top+e.height-c[2].width),L(g,d[3],d[0],b.bottomLeftInner,b.topLeftInner,e.left+c[3].width,e.top+e.height-c[2].width);break;default:L(g,d[0],d[1],b.topLeftOuter,b.topRightOuter,e.left,e.top),L(g,d[1],d[2],b.topRightOuter,b.bottomRightOuter,e.left+e.width,e.top),L(g,d[2],d[3],b.bottomRightOuter,b.bottomLeftOuter,e.left+e.width,e.top+e.height),L(g,d[3],d[0],b.bottomLeftOuter,b.topLeftOuter,e.left,e.top+e.height)}return g},E.prototype.pseudoHideClass="___html2canvas___pseudoelement";var rb=0;jb.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;this.drawImage(d,0,0,d.width,d.height,b.left+e+i[3].width,b.top+f+i[0].width,b.width-(i[1].width+i[3].width+e+g),b.height-(i[0].width+i[2].width+f+h))},jb.prototype.renderBackground=function(a,b,c){b.height>0&&b.width>0&&(this.renderBackgroundColor(a,b),this.renderBackgroundImage(a,b,c))},jb.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"))},jb.prototype.renderBorders=function(a){a.forEach(this.renderBorder,this)},jb.prototype.renderBorder=function(a){this.isTransparent(a.color)||null===a.args||this.drawShape(a.args,a.color)},jb.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):u("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):u("Error loading background-image",d.args[0]);break;case"none":break;default:u("Unknown background-image type",d.args[0])}},this)},jb.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,c.image.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],c.image.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],c.image.width,c.image.height,e);break;default:this.renderBackgroundRepeat(c,g,f,{top:b.top,left:b.left},e[3],e[0])}},jb.prototype.isTransparent=function(a){return!a||"transparent"===a||"rgba(0, 0, 0, 0)"===a},kb.prototype=Object.create(jb.prototype),kb.prototype.setFillStyle=function(a){return this.ctx.fillStyle=a,this.ctx},kb.prototype.rectangle=function(a,b,c,d,e){this.setFillStyle(e).fillRect(a,b,c,d)},kb.prototype.drawShape=function(a,b){this.shape(a),this.setFillStyle(b).fill()},kb.prototype.drawImage=function(a,b,c,d,e,f,g,h,i){this.ctx.drawImage(a,b,c,d,e,f,g,h,i)},kb.prototype.clip=function(a,b,c){this.ctx.save(),this.shape(a).clip(),b.call(c),this.ctx.restore()},kb.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},kb.prototype.font=function(a,b,c,d,e,f){this.setFillStyle(a).font=[b,c,d,e,f].join(" ")},kb.prototype.fontShadow=function(a,b,c,d){this.setVariable("shadowColor",a).setVariable("shadowOffsetY",b).setVariable("shadowOffsetX",c).setVariable("shadowBlur",d)},kb.prototype.clearShadow=function(){this.setVariable("shadowColor","rgba(0,0,0,0)")},kb.prototype.setOpacity=function(a){this.ctx.globalAlpha=a},kb.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])},kb.prototype.setVariable=function(a,b){return this.variables[a]!==b&&(this.variables[a]=this.ctx[a]=b),this},kb.prototype.text=function(a,b,c){this.ctx.fillText(a,b,c)},kb.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)},kb.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)},kb.prototype.renderBackgroundGradient=function(a,b){if(a instanceof t){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)}},kb.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},lb.prototype=Object.create(v.prototype),lb.prototype.getParentStack=function(a){var b=this.parent?this.parent.stack:null;return b?b.ownStacking?b:b.getParentStack(a):a.stack},mb.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},mb.prototype.testCORS=function(){return"undefined"!=typeof(new Image).crossOrigin},nb.prototype=Object.create(v.prototype),nb.prototype.applyTextTransform=function(){this.node.data=this.transform(this.parent.css("textTransform"))},nb.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,ob);case"uppercase":return b.toUpperCase();default:return b}},pb.prototype=Object.create(o.prototype)}(window,document); |