mirror of
https://github.com/niklasvh/html2canvas.git
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8 lines
38 KiB
JavaScript
8 lines
38 KiB
JavaScript
/*
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html2canvas 0.5.0-rc1 <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(t,e,n){function r(t,e,n,r){return c(t,n,r,e).then(function(a){b("Document cloned");var c="["+me+"='true']";t.querySelector(c).removeAttribute(me);var h=a.contentWindow,u=h.document.querySelector(c),p=new le(h.document),l=new m(e,p),d=S(u),f="view"===e.type?Math.min(d.width,n):i(),g="view"===e.type?Math.min(d.height,r):s(),y=new ue(f,g,l),v=new B(u,y,p,l,e);return v.ready.then(function(){return b("Finished rendering"),e.removeContainer&&a.parentNode.removeChild(a),"view"===e.type||u!==h.document.body&&u!==h.document.documentElement?o(y.canvas,d):y.canvas})})}function o(t,n){var r=e.createElement("canvas"),o=Math.min(t.width-1,Math.max(0,n.left)),i=Math.min(t.width,Math.max(1,n.left+n.width)),s=Math.min(t.height-1,Math.max(0,n.top)),a=Math.min(t.height,Math.max(1,n.top+n.height)),c=r.width=i-o,h=r.height=a-s;return b("Cropping canvas at:","left:",n.left,"top:",n.top,"width:",n.width,"height:",n.height),b("Resulting crop with width",c,"and height",h," with x",o,"and 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Promise(function(r,o){n.image.onload=r,n.image.onerror=o,e&&(n.image.crossOrigin="anonymous"),n.image.src=t,n.image.complete===!0&&r(n.image)})["catch"](function(){var e=new p(t);return e.promise.then(function(t){n.image=t})})}function m(e,n){this.link=null,this.options=e,this.support=n,this.origin=t.location.protocol+t.location.hostname+t.location.port}function y(t){return"IMG"===t.node.nodeName}function v(t){return{args:[t.node.src],method:"url"}}function w(t){f.apply(this,arguments),this.type=this.TYPES.LINEAR,t.args[0].split(" ").forEach(function(t){switch(t){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}},this),this.colorStops=t.args.slice(1).map(function(t){var e=t.match(this.stepRegExp);return{color:e[1],stop:"%"===e[3]?e[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(t,e){null===t.stop&&this.colorStops.slice(e).some(function(n,r){return null!==n.stop?(t.stop=(n.stop-this.colorStops[e-1].stop)/(r+1)+this.colorStops[e-1].stop,!0):!1},this)},this)}function b(){t.html2canvas.logging&&t.console&&t.console.log&&Function.prototype.bind.call(t.console.log,t.console).apply(t.console,[Date.now()-t.html2canvas.start+"ms","html2canvas:"].concat([].slice.call(arguments,0)))}function x(t,e){this.node=t,this.parent=e,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 T(t){var e=t.options[t.selectedIndex||0];return e?e.text||"":""}function 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o="auto"===i[0]&&"auto"===i[1]?e.height:"auto"===i[1]?r/e.width*e.height:k(i[1])?t.height*parseFloat(i[1])/100:parseInt(i[1],10),"auto"===i[0]&&(r=o/e.height*e.width),{width:r,height:o}},x.prototype.parseBackgroundPosition=function(t,e,n,r){var o,i,s=this.cssList("backgroundPosition",n);return o=k(s[0])?(t.width-(r||e).width)*(parseFloat(s[0])/100):parseInt(s[0],10),i="auto"===s[1]?o/e.width*e.height:k(s[1])?(t.height-(r||e).height)*parseFloat(s[1])/100:parseInt(s[1],10),"auto"===s[0]&&(o=i/e.height*e.width),{left:o,top:i}},x.prototype.parseBackgroundRepeat=function(t){return this.cssList("backgroundRepeat",t)[0]},x.prototype.parseTextShadows=function(){var t=this.css("textShadow"),e=[];if(t&&"none"!==t)for(var n=t.match(this.TEXT_SHADOW_PROPERTY),r=0;n&&n.length>r;r++){var o=n[r].match(this.TEXT_SHADOW_VALUES);e.push({color:o[0],offsetX:o[1]?o[1].replace("px",""):0,offsetY:o[2]?o[2].replace("px",""):0,blur:o[3]?o[3].replace("px",""):0})}return e},x.prototype.parseTransform=function(){if(!this.transformData)if(this.hasTransform()){var t=this.parseBounds(),e=this.prefixedCss("transformOrigin").split(" ").map(R).map(C);e[0]+=t.left,e[1]+=t.top,this.transformData={origin:e,matrix:this.parseTransformMatrix()}}else this.transformData={origin:[0,0],matrix:[1,0,0,1,0,0]};return this.transformData},x.prototype.parseTransformMatrix=function(){if(!this.transformMatrix){var t=this.prefixedCss("transform"),e=t?E(t.match(this.MATRIX_PROPERTY)):null;this.transformMatrix=e?e:[1,0,0,1,0,0]}return this.transformMatrix},x.prototype.parseBounds=function(){return this.bounds||(this.bounds=this.hasTransform()?O(this.node):S(this.node))},x.prototype.hasTransform=function(){return"1,0,0,1,0,0"!==this.parseTransformMatrix().join(",")||this.parent&&this.parent.hasTransform()},x.prototype.getValue=function(){var t=this.node.value||"";return t="SELECT"===this.node.tagName?T(this.node):t,0===t.length?this.node.placeholder||"":t},x.prototype.MATRIX_PROPERTY=/(matrix)\((.+)\)/,x.prototype.TEXT_SHADOW_PROPERTY=/((rgba|rgb)\([^\)]+\)(\s-?\d+px){0,})/g,x.prototype.TEXT_SHADOW_VALUES=/(-?\d+px)|(#.+)|(rgb\(.+\))|(rgba\(.+\))/g,B.prototype.asyncRenderer=function(t,e,n){n=n||Date.now(),this.paint(t[this.renderIndex++]),t.length===this.renderIndex?e():n+20>Date.now()?this.asyncRenderer(t,e,n):setTimeout(ne(function(){this.asyncRenderer(t,e)},this),0)},B.prototype.createPseudoHideStyles=function(t){var e=t.createElement("style");e.innerHTML="."+this.pseudoHideClass+':before { content: "" !important; display: none !important; }'+"."+this.pseudoHideClass+':after { content: "" !important; display: none !important; }',t.body.appendChild(e)},B.prototype.getPseudoElements=function(t){var e=[[t]];if(t.node.nodeType===Node.ELEMENT_NODE){var n=this.getPseudoElement(t,":before"),r=this.getPseudoElement(t,":after");n&&(t.node.insertBefore(n[0].node,t.node.firstChild),e.push(n)),r&&(t.node.appendChild(r[0].node),e.push(r)),(n||r)&&(t.node.className+=" "+this.pseudoHideClass)}return se(e)},B.prototype.getPseudoElement=function(t,n){var r=t.computedStyle(n);if(!r||!r.content||"none"===r.content||"-moz-alt-content"===r.content||"none"===r.display)return null;for(var o=ae(r.content),i="url"===o.substr(0,3),s=e.createElement(i?"img":"html2canvaspseudoelement"),a=new x(s,t),c=r.length-1;c>=0;c--){var h=A(r.item(c));s.style[h]=r[h]}if(s.className=this.pseudoHideClass,i)return s.src=I(o)[0].args[0],[a];var u=e.createTextNode(o);return s.appendChild(u),[a,new de(u,a)]},B.prototype.getChildren=function(t){return se([].filter.call(t.node.childNodes,U).map(function(e){var n=[e.nodeType===Node.TEXT_NODE?new de(e,t):new x(e,t)].filter(ie);return e.nodeType===Node.ELEMENT_NODE&&n.length&&"TEXTAREA"!==e.tagName?n[0].isElementVisible()?n.concat(this.getChildren(n[0])):[]:n},this))},B.prototype.newStackingContext=function(t,e){var n=new pe(e,t.cssFloat("opacity"),t.node,t.parent);n.visible=t.visible;var r=e?n.getParentStack(this):n.parent.stack;r.contexts.push(n),t.stack=n},B.prototype.createStackingContexts=function(){this.nodes.forEach(function(t){K(t)&&(this.isRootElement(t)||ee(t)||Q(t)||this.isBodyWithTransparentRoot(t)||t.hasTransform())?this.newStackingContext(t,!0):K(t)&&(G(t)&&H(t)||$(t)||q(t))?this.newStackingContext(t,!1):t.assignStack(t.parent.stack)},this)},B.prototype.isBodyWithTransparentRoot=function(t){return"BODY"===t.node.nodeName&&this.renderer.isTransparent(t.parent.css("backgroundColor"))},B.prototype.isRootElement=function(t){return null===t.parent},B.prototype.sortStackingContexts=function(t){t.contexts.sort(te),t.contexts.forEach(this.sortStackingContexts,this)},B.prototype.parseTextBounds=function(t){return function(e,n,r){if("none"!==t.parent.css("textDecoration").substr(0,4)||0!==e.trim().length){if(this.support.rangeBounds&&!t.parent.hasTransform()){var o=r.slice(0,n).join("").length;return this.getRangeBounds(t.node,o,e.length)}if(t.node&&"string"==typeof t.node.data){var i=t.node.splitText(e.length),s=this.getWrapperBounds(t.node,t.parent.hasTransform());return t.node=i,s}}else(!this.support.rangeBounds||t.parent.hasTransform())&&(t.node=t.node.splitText(e.length));return{}}},B.prototype.getWrapperBounds=function(t,e){var n=t.ownerDocument.createElement("html2canvaswrapper"),r=t.parentNode,o=t.cloneNode(!0);n.appendChild(t.cloneNode(!0)),r.replaceChild(n,t);var i=e?O(n):S(n);return r.replaceChild(o,n),i},B.prototype.getRangeBounds=function(t,e,n){var r=this.range||(this.range=t.ownerDocument.createRange());return r.setStart(t,e),r.setEnd(t,e+n),r.getBoundingClientRect()},B.prototype.parse=function(t){var e=t.contexts.filter(W),n=t.children.filter(K),r=n.filter(J(q)),o=r.filter(J(G)).filter(J(j)),i=n.filter(J(G)).filter(q),s=r.filter(J(G)).filter(j),a=t.contexts.concat(r.filter(G)).filter(H),c=t.children.filter(Z).filter(V),h=t.contexts.filter(F);e.concat(o).concat(i).concat(s).concat(a).concat(c).concat(h).forEach(function(t){this.renderQueue.push(t),z(t)&&(this.parse(t),this.renderQueue.push(new M))},this)},B.prototype.paint=function(t){try{t instanceof M?this.renderer.ctx.restore():Z(t)?this.paintText(t):this.paintNode(t)}catch(e){b(e)}},B.prototype.paintNode=function(t){z(t)&&(this.renderer.setOpacity(t.opacity),this.renderer.ctx.save(),t.hasTransform()&&this.renderer.setTransform(t.parseTransform()));var e=t.parseBounds(),n=this.parseBorders(t);switch(this.renderer.clip(n.clip,function(){this.renderer.renderBackground(t,e,n.borders.map(oe))},this),this.renderer.renderBorders(n.borders),t.node.nodeName){case"IMG":var r=this.images.get(t.node.src);r?this.renderer.renderImage(t,e,n,r.image):b("Error loading <img>",t.node.src);break;case"SELECT":case"INPUT":case"TEXTAREA":this.paintFormValue(t)}},B.prototype.paintFormValue=function(t){if(t.getValue().length>0){var e=t.node.ownerDocument,n=e.createElement("html2canvaswrapper"),r=["lineHeight","textAlign","fontFamily","fontWeight","fontSize","color","paddingLeft","paddingTop","paddingRight","paddingBottom","width","height","borderLeftStyle","borderTopStyle","borderLeftWidth","borderTopWidth","boxSizing","whiteSpace","wordWrap"];r.forEach(function(e){try{n.style[e]=t.css(e)}catch(r){b("html2canvas: Parse: Exception caught in renderFormValue: "+r.message)}});var o=t.parseBounds();n.style.position="absolute",n.style.left=o.left+"px",n.style.top=o.top+"px",n.textContent=t.getValue(),e.body.appendChild(n),this.paintText(new de(n.firstChild,t)),e.body.removeChild(n)}},B.prototype.paintText=function(t){t.applyTextTransform();var e=t.node.data.split(!this.options.letterRendering||Y(t)?/(\b| )/:""),n=t.parent.fontWeight(),r=t.parent.css("fontSize"),o=t.parent.css("fontFamily"),i=t.parent.parseTextShadows();this.renderer.font(t.parent.css("color"),t.parent.css("fontStyle"),t.parent.css("fontVariant"),n,r,o),i.length?this.renderer.fontShadow(i[0].color,i[0].offsetX,i[0].offsetY,i[0].blur):this.renderer.clearShadow(),e.map(this.parseTextBounds(t),this).forEach(function(n,i){n&&(this.renderer.text(e[i],n.left,n.bottom),this.renderTextDecoration(t.parent,n,this.fontMetrics.getMetrics(o,r)))},this)},B.prototype.renderTextDecoration=function(t,e,n){switch(t.css("textDecoration").split(" ")[0]){case"underline":this.renderer.rectangle(e.left,Math.round(e.top+n.baseline+n.lineWidth),e.width,1,t.css("color"));break;case"overline":this.renderer.rectangle(e.left,Math.round(e.top),e.width,1,t.css("color"));break;case"line-through":this.renderer.rectangle(e.left,Math.ceil(e.top+n.middle+n.lineWidth),e.width,1,t.css("color"))}},B.prototype.parseBorders=function(t){var e=t.bounds,n=X(t),r=["Top","Right","Bottom","Left"].map(function(e){return{width:t.cssInt("border"+e+"Width"),color:t.css("border"+e+"Color"),args:null}}),o=P(e,n,r);return{clip:this.parseBackgroundClip(t,o,r,n,e),borders:r.map(function(t,i){if(t.width>0){var s=e.left,a=e.top,c=e.width,h=e.height-r[2].width;switch(i){case 0:h=r[0].width,t.args=D({c1:[s,a],c2:[s+c,a],c3:[s+c-r[1].width,a+h],c4:[s+r[3].width,a+h]},n[0],n[1],o.topLeftOuter,o.topLeftInner,o.topRightOuter,o.topRightInner);break;case 1:s=e.left+e.width-r[1].width,c=r[1].width,t.args=D({c1:[s+c,a],c2:[s+c,a+h+r[2].width],c3:[s,a+h],c4:[s,a+r[0].width]},n[1],n[2],o.topRightOuter,o.topRightInner,o.bottomRightOuter,o.bottomRightInner);
|
|
break;case 2:a=a+e.height-r[2].width,h=r[2].width,t.args=D({c1:[s+c,a+h],c2:[s,a+h],c3:[s+r[3].width,a],c4:[s+c-r[3].width,a]},n[2],n[3],o.bottomRightOuter,o.bottomRightInner,o.bottomLeftOuter,o.bottomLeftInner);break;case 3:c=r[3].width,t.args=D({c1:[s,a+h+r[2].width],c2:[s,a],c3:[s+c,a+r[0].width],c4:[s+c,a+h]},n[3],n[0],o.bottomLeftOuter,o.bottomLeftInner,o.topLeftOuter,o.topLeftInner)}}return t})}},B.prototype.parseBackgroundClip=function(t,e,n,r,o){var i=t.css("backgroundClip"),s=[];switch(i){case"content-box":case"padding-box":_(s,r[0],r[1],e.topLeftInner,e.topRightInner,o.left+n[3].width,o.top+n[0].width),_(s,r[1],r[2],e.topRightInner,e.bottomRightInner,o.left+o.width-n[1].width,o.top+n[0].width),_(s,r[2],r[3],e.bottomRightInner,e.bottomLeftInner,o.left+o.width-n[1].width,o.top+o.height-n[2].width),_(s,r[3],r[0],e.bottomLeftInner,e.topLeftInner,o.left+n[3].width,o.top+o.height-n[2].width);break;default:_(s,r[0],r[1],e.topLeftOuter,e.topRightOuter,o.left,o.top),_(s,r[1],r[2],e.topRightOuter,e.bottomRightOuter,o.left+o.width,o.top),_(s,r[2],r[3],e.bottomRightOuter,e.bottomLeftOuter,o.left+o.width,o.top+o.height),_(s,r[3],r[0],e.bottomLeftOuter,e.topLeftOuter,o.left,o.top+o.height)}return s},B.prototype.pseudoHideClass="___html2canvas___pseudoelement";var ye=0;he.prototype.renderImage=function(t,e,n,r){var o=t.cssInt("paddingLeft"),i=t.cssInt("paddingTop"),s=t.cssInt("paddingRight"),a=t.cssInt("paddingBottom"),c=n.borders;this.drawImage(r,0,0,r.width,r.height,e.left+o+c[3].width,e.top+i+c[0].width,e.width-(c[1].width+c[3].width+o+s),e.height-(c[0].width+c[2].width+i+a))},he.prototype.renderBackground=function(t,e,n){e.height>0&&e.width>0&&(this.renderBackgroundColor(t,e),this.renderBackgroundImage(t,e,n))},he.prototype.renderBackgroundColor=function(t,e){var n=t.css("backgroundColor");this.isTransparent(n)||this.rectangle(e.left,e.top,e.width,e.height,t.css("backgroundColor"))},he.prototype.renderBorders=function(t){t.forEach(this.renderBorder,this)},he.prototype.renderBorder=function(t){this.isTransparent(t.color)||null===t.args||this.drawShape(t.args,t.color)},he.prototype.renderBackgroundImage=function(t,e,n){var r=t.parseBackgroundImages();r.reverse().forEach(function(r,o,i){switch(r.method){case"url":var s=this.images.get(r.args[0]);s?this.renderBackgroundRepeating(t,e,s,i.length-(o+1),n):b("Error loading background-image",r.args[0]);break;case"linear-gradient":case"gradient":var a=this.images.get(r.value);a?this.renderBackgroundGradient(a,e,n):b("Error loading background-image",r.args[0]);break;case"none":break;default:b("Unknown background-image type",r.args[0])}},this)},he.prototype.renderBackgroundRepeating=function(t,e,n,r,o){var i=t.parseBackgroundSize(e,n.image,r),s=t.parseBackgroundPosition(e,n.image,r,i),a=t.parseBackgroundRepeat(r);switch(a){case"repeat-x":case"repeat no-repeat":this.backgroundRepeatShape(n,s,i,e,e.left+o[3],e.top+s.top+o[0],99999,n.image.height,o);break;case"repeat-y":case"no-repeat repeat":this.backgroundRepeatShape(n,s,i,e,e.left+s.left+o[3],e.top+o[0],n.image.width,99999,o);break;case"no-repeat":this.backgroundRepeatShape(n,s,i,e,e.left+s.left+o[3],e.top+s.top+o[0],n.image.width,n.image.height,o);break;default:this.renderBackgroundRepeat(n,s,i,{top:e.top,left:e.left},o[3],o[0])}},he.prototype.isTransparent=function(t){return!t||"transparent"===t||"rgba(0, 0, 0, 0)"===t},ue.prototype=Object.create(he.prototype),ue.prototype.setFillStyle=function(t){return this.ctx.fillStyle=t,this.ctx},ue.prototype.rectangle=function(t,e,n,r,o){this.setFillStyle(o).fillRect(t,e,n,r)},ue.prototype.drawShape=function(t,e){this.shape(t),this.setFillStyle(e).fill()},ue.prototype.drawImage=function(t,e,n,r,o,i,s,a,c){this.ctx.drawImage(t,e,n,r,o,i,s,a,c)},ue.prototype.clip=function(t,e,n){this.ctx.save(),this.shape(t).clip(),e.call(n),this.ctx.restore()},ue.prototype.shape=function(t){return this.ctx.beginPath(),t.forEach(function(t,e){this.ctx[0===e?"moveTo":t[0]+"To"].apply(this.ctx,t.slice(1))},this),this.ctx.closePath(),this.ctx},ue.prototype.font=function(t,e,n,r,o,i){this.setFillStyle(t).font=[e,n,r,o,i].join(" ")},ue.prototype.fontShadow=function(t,e,n,r){this.setVariable("shadowColor",t).setVariable("shadowOffsetY",e).setVariable("shadowOffsetX",n).setVariable("shadowBlur",r)},ue.prototype.clearShadow=function(){this.setVariable("shadowColor","rgba(0,0,0,0)")},ue.prototype.setOpacity=function(t){this.ctx.globalAlpha=t},ue.prototype.setTransform=function(t){this.ctx.translate(t.origin[0],t.origin[1]),this.ctx.transform.apply(this.ctx,t.matrix),this.ctx.translate(-t.origin[0],-t.origin[1])},ue.prototype.setVariable=function(t,e){return this.variables[t]!==e&&(this.variables[t]=this.ctx[t]=e),this},ue.prototype.text=function(t,e,n){this.ctx.fillText(t,e,n)},ue.prototype.backgroundRepeatShape=function(t,e,n,r,o,i,s,a,c){var h=[["line",Math.round(o),Math.round(i)],["line",Math.round(o+s),Math.round(i)],["line",Math.round(o+s),Math.round(a+i)],["line",Math.round(o),Math.round(a+i)]];this.clip(h,function(){this.renderBackgroundRepeat(t,e,n,r,c[3],c[0])},this)},ue.prototype.renderBackgroundRepeat=function(t,e,n,r,o,i){var s=Math.round(r.left+e.left+o),a=Math.round(r.top+e.top+i);this.setFillStyle(this.ctx.createPattern(this.resizeImage(t,n),"repeat")),this.ctx.translate(s,a),this.ctx.fill(),this.ctx.translate(-s,-a)},ue.prototype.renderBackgroundGradient=function(t,e){if(t instanceof w){var n=this.ctx.createLinearGradient(e.left+e.width*t.x0,e.top+e.height*t.y0,e.left+e.width*t.x1,e.top+e.height*t.y1);t.colorStops.forEach(function(t){n.addColorStop(t.stop,t.color)}),this.rectangle(e.left,e.top,e.width,e.height,n)}},ue.prototype.resizeImage=function(t,n){var r=t.image;if(r.width===n.width&&r.height===n.height)return r;var o,i=e.createElement("canvas");return i.width=n.width,i.height=n.height,o=i.getContext("2d"),o.drawImage(r,0,0,r.width,r.height,0,0,n.width,n.height),i},pe.prototype=Object.create(x.prototype),pe.prototype.getParentStack=function(t){var e=this.parent?this.parent.stack:null;return e?e.ownStacking?e:e.getParentStack(t):t.stack},le.prototype.testRangeBounds=function(t){var e,n,r,o,i=!1;return t.createRange&&(e=t.createRange(),e.getBoundingClientRect&&(n=t.createElement("boundtest"),n.style.height="123px",n.style.display="block",t.body.appendChild(n),e.selectNode(n),r=e.getBoundingClientRect(),o=r.height,123===o&&(i=!0),t.body.removeChild(n))),i},le.prototype.testCORS=function(){return(new Image).crossOrigin!==n},de.prototype=Object.create(x.prototype),de.prototype.applyTextTransform=function(){this.node.data=this.transform(this.parent.css("textTransform"))},de.prototype.transform=function(t){var e=this.node.data;switch(t){case"lowercase":return e.toLowerCase();case"capitalize":return e.replace(/(^|\s|:|-|\(|\))([a-z])/g,fe);case"uppercase":return e.toUpperCase();default:return e}},ge.prototype=Object.create(f.prototype)})(window,document); |