diff --git a/build/html2canvas.js b/build/html2canvas.js index 3a44bc3..b3aeb3f 100644 --- a/build/html2canvas.js +++ b/build/html2canvas.js @@ -1029,7 +1029,7 @@ function h2cRenderContext(width, height) { } }; } -_html2canvas.Parse = function (images, options) { +_html2canvas.Parse = function (images, options, cb) { window.scroll(0,0); var element = (( options.elements === undefined ) ? document.body : options.elements[0]), // select body by default @@ -1050,6 +1050,28 @@ _html2canvas.Parse = function (images, options) { images = images || {}; + function init() { + var background = getCSS(document.documentElement, "backgroundColor"), + transparentBackground = (Util.isTransparent(background) && element === document.body), + stack = renderElement(element, null, false, transparentBackground); + + parseChildren(element, stack, null, function() { + if (transparentBackground) { + background = stack.backgroundColor; + } + + Util.log('Done parsing, moving to Render.'); + + body.removeChild(hidePseudoElements); + cb({ + backgroundColor: background, + stack: stack + }); + }); + } + + init(); + function documentWidth () { return Math.max( Math.max(doc.body.scrollWidth, doc.documentElement.scrollWidth), @@ -1367,6 +1389,13 @@ _html2canvas.Parse = function (images, options) { } } + function h2czContext(zindex) { + return { + zindex: zindex, + children: [] + }; + } + function renderImage(ctx, element, image, bounds, borders) { var paddingLeft = getCSSInt(element, 'paddingLeft'), @@ -1403,69 +1432,67 @@ _html2canvas.Parse = function (images, options) { }); } - var getCurvePoints = (function(kappa) { - - return function(x, y, r1, r2) { - var ox = (r1) * kappa, // control point offset horizontal - oy = (r2) * kappa, // control point offset vertical - xm = x + r1, // x-middle - ym = y + r2; // y-middle - return { - topLeft: bezierCurve({ - x:x, - y:ym - }, { - x:x, - y:ym - oy - }, { - x:xm - ox, - y:y - }, { - x:xm, - y:y - }), - topRight: bezierCurve({ - x:x, - y:y - }, { - x:x + ox, - y:y - }, { - x:xm, - y:ym - oy - }, { - x:xm, - y:ym - }), - bottomRight: bezierCurve({ - x:xm, - y:y - }, { - x:xm, - y:y + oy - }, { - x:x + ox, - y:ym - }, { - x:x, - y:ym - }), - bottomLeft: bezierCurve({ - x:xm, - y:ym - }, { - x:xm - ox, - y:ym - }, { - x:x, - y:y + oy - }, { - x:x, - y:y - }) - }; + function getCurvePoints(x, y, r1, r2) { + var kappa = 4 * ((Math.sqrt(2) - 1) / 3); + var ox = (r1) * kappa, // control point offset horizontal + oy = (r2) * kappa, // control point offset vertical + xm = x + r1, // x-middle + ym = y + r2; // y-middle + return { + topLeft: bezierCurve({ + x:x, + y:ym + }, { + x:x, + y:ym - oy + }, { + x:xm - ox, + y:y + }, { + x:xm, + y:y + }), + topRight: bezierCurve({ + x:x, + y:y + }, { + x:x + ox, + y:y + }, { + x:xm, + y:ym - oy + }, { + x:xm, + y:ym + }), + bottomRight: bezierCurve({ + x:xm, + y:y + }, { + x:xm, + y:y + oy + }, { + x:x + ox, + y:ym + }, { + x:x, + y:ym + }), + bottomLeft: bezierCurve({ + x:xm, + y:ym + }, { + x:xm - ox, + y:ym + }, { + x:x, + y:y + oy + }, { + x:x, + y:y + }) }; - })(4 * ((Math.sqrt(2) - 1) / 3)); + } function bezierCurve(start, startControl, endControl, end) { @@ -1984,9 +2011,8 @@ _html2canvas.Parse = function (images, options) { return str.replace("px", ""); } - var transformRegExp = /(matrix)\((.+)\)/; - function getTransform(element, parentStack) { + var transformRegExp = /(matrix)\((.+)\)/; var transform = getCSS(element, "transform") || getCSS(element, "-webkit-transform") || getCSS(element, "-moz-transform") || getCSS(element, "-ms-transform") || getCSS(element, "-o-transform"); var transformOrigin = getCSS(element, "transform-origin") || getCSS(element, "-webkit-transform-origin") || getCSS(element, "-moz-transform-origin") || getCSS(element, "-ms-transform-origin") || getCSS(element, "-o-transform-origin") || "0px 0px"; @@ -2127,52 +2153,54 @@ _html2canvas.Parse = function (images, options) { return (getCSS(element, 'display') !== "none" && getCSS(element, 'visibility') !== "hidden" && !element.hasAttribute("data-html2canvas-ignore")); } - function parseElement (element, stack, pseudoElement) { + function parseElement (element, stack, pseudoElement, cb) { + if (!cb) { + cb = function(){}; + } if (isElementVisible(element)) { stack = renderElement(element, stack, pseudoElement, false) || stack; if (!ignoreElementsRegExp.test(element.nodeName)) { - parseChildren(element, stack, pseudoElement); + return parseChildren(element, stack, pseudoElement, cb); } } + cb(); } - function parseChildren(element, stack, pseudoElement) { - Util.Children(element).forEach(function(node) { + function parseChildren(element, stack, pseudoElement, cb) { + var children = Util.Children(element); + // After all nodes have processed, finished() will call the cb. + // We add one and kick it off so this will still work when children.length === 0. + // Note that unless async is true, this will happen synchronously, just will callbacks. + var jobs = children.length + 1; + finished(); + + if (options.async) { + children.forEach(function(node) { + // Don't block the page from rendering + setTimeout(function(){ parseNode(node); }, 0); + }); + } else { + children.forEach(parseNode); + } + + function parseNode(node) { if (node.nodeType === node.ELEMENT_NODE) { - parseElement(node, stack, pseudoElement); + parseElement(node, stack, pseudoElement, finished); } else if (node.nodeType === node.TEXT_NODE) { renderText(element, node, stack); + finished(); + } else { + finished(); + } + } + function finished(el) { + if (--jobs <= 0){ + Util.log("finished rendering " + children.length + " children."); + cb(); } - }); - } - - function init() { - var background = getCSS(document.documentElement, "backgroundColor"), - transparentBackground = (Util.isTransparent(background) && element === document.body), - stack = renderElement(element, null, false, transparentBackground); - parseChildren(element, stack); - - if (transparentBackground) { - background = stack.backgroundColor; } - - body.removeChild(hidePseudoElements); - return { - backgroundColor: background, - stack: stack - }; } - - return init(); }; - -function h2czContext(zindex) { - return { - zindex: zindex, - children: [] - }; -} - _html2canvas.Preload = function( options ) { var images = { @@ -2697,21 +2725,19 @@ window.html2canvas = function(elements, opts) { return; } } - queue = _html2canvas.Parse( images, options ); - - if (typeof options.onparsed === "function") { - if ( options.onparsed( queue ) === false ) { - return; + _html2canvas.Parse( images, options, function(queue) { + if (typeof options.onparsed === "function") { + if ( options.onparsed( queue ) === false ) { + return; + } } - } - - canvas = _html2canvas.Renderer( queue, options ); - - if (typeof options.onrendered === "function") { - options.onrendered( canvas ); - } + canvas = _html2canvas.Renderer( queue, options ); + if (typeof options.onrendered === "function") { + options.onrendered( canvas ); + } + }); }; // for pages without images, we still want this to be async, i.e. return methods before executing diff --git a/build/html2canvas.min.js b/build/html2canvas.min.js index 2ea032d..ff2334e 100644 --- a/build/html2canvas.min.js +++ b/build/html2canvas.min.js @@ -4,5 +4,5 @@ Released under MIT License */ -(function(t,e,n){"use strict";function r(t,e,n){var r,a=t.runtimeStyle&&t.runtimeStyle[e],o=t.style;return!/^-?[0-9]+\.?[0-9]*(?:px)?$/i.test(n)&&/^-?\d/.test(n)&&(r=o.left,a&&(t.runtimeStyle.left=t.currentStyle.left),o.left="fontSize"===e?"1em":n||0,n=o.pixelLeft+"px",o.left=r,a&&(t.runtimeStyle.left=a)),/^(thin|medium|thick)$/i.test(n)?n:Math.round(parseFloat(n))+"px"}function a(t){return parseInt(t,10)}function o(t,e,a,o){if(t=(t||"").split(","),t=t[o||0]||t[0]||"auto",t=u.Util.trimText(t).split(" "),"backgroundSize"!==a||t[0]&&!t[0].match(/cover|contain|auto/)){if(t[0]=-1===t[0].indexOf("%")?r(e,a+"X",t[0]):t[0],t[1]===n){if("backgroundSize"===a)return t[1]="auto",t;t[1]=t[0]}t[1]=-1===t[1].indexOf("%")?r(e,a+"Y",t[1]):t[1]}else;return t}function i(t,e,n,r,a,o){var i,l,s,c,d=u.Util.getCSS(e,t,a);if(1===d.length&&(c=d[0],d=[],d[0]=c,d[1]=c),-1!==(""+d[0]).indexOf("%"))s=parseFloat(d[0])/100,l=n.width*s,"backgroundSize"!==t&&(l-=(o||r).width*s);else if("backgroundSize"===t)if("auto"===d[0])l=r.width;else if(/contain|cover/.test(d[0])){var h=u.Util.resizeBounds(r.width,r.height,n.width,n.height,d[0]);l=h.width,i=h.height}else l=parseInt(d[0],10);else l=parseInt(d[0],10);return"auto"===d[1]?i=l/r.width*r.height:-1!==(""+d[1]).indexOf("%")?(s=parseFloat(d[1])/100,i=n.height*s,"backgroundSize"!==t&&(i-=(o||r).height*s)):i=parseInt(d[1],10),[l,i]}function l(t,e){var n=[];return{storage:n,width:t,height:e,clip:function(){n.push({type:"function",name:"clip",arguments:arguments})},translate:function(){n.push({type:"function",name:"translate",arguments:arguments})},fill:function(){n.push({type:"function",name:"fill",arguments:arguments})},save:function(){n.push({type:"function",name:"save",arguments:arguments})},restore:function(){n.push({type:"function",name:"restore",arguments:arguments})},fillRect:function(){n.push({type:"function",name:"fillRect",arguments:arguments})},createPattern:function(){n.push({type:"function",name:"createPattern",arguments:arguments})},drawShape:function(){var t=[];return n.push({type:"function",name:"drawShape",arguments:t}),{moveTo:function(){t.push({name:"moveTo",arguments:arguments})},lineTo:function(){t.push({name:"lineTo",arguments:arguments})},arcTo:function(){t.push({name:"arcTo",arguments:arguments})},bezierCurveTo:function(){t.push({name:"bezierCurveTo",arguments:arguments})},quadraticCurveTo:function(){t.push({name:"quadraticCurveTo",arguments:arguments})}}},drawImage:function(){n.push({type:"function",name:"drawImage",arguments:arguments})},fillText:function(){n.push({type:"function",name:"fillText",arguments:arguments})},setVariable:function(t,e){return n.push({type:"variable",name:t,arguments:e}),e}}}function s(t){return{zindex:t,children:[]}}var c,d,u={};u.Util={},u.Util.log=function(e){u.logging&&t.console&&t.console.log&&t.console.log(e)},u.Util.trimText=function(t){return function(e){return t?t.apply(e):((e||"")+"").replace(/^\s+|\s+$/g,"")}}(String.prototype.trim),u.Util.asFloat=function(t){return parseFloat(t)},function(){var t=/((rgba|rgb)\([^\)]+\)(\s-?\d+px){0,})/g,e=/(-?\d+px)|(#.+)|(rgb\(.+\))|(rgba\(.+\))/g;u.Util.parseTextShadows=function(n){if(!n||"none"===n)return[];for(var r=n.match(t),a=[],o=0;r&&r.length>o;o++){var i=r[o].match(e);a.push({color:i[0],offsetX:i[1]?i[1].replace("px",""):0,offsetY:i[2]?i[2].replace("px",""):0,blur:i[3]?i[3].replace("px",""):0})}return a}}(),u.Util.parseBackgroundImage=function(t){var e,n,r,a,o,i,l,s,c=" \r\n ",d=[],u=0,h=0,f=function(){e&&('"'===n.substr(0,1)&&(n=n.substr(1,n.length-2)),n&&s.push(n),"-"===e.substr(0,1)&&(a=e.indexOf("-",1)+1)>0&&(r=e.substr(0,a),e=e.substr(a)),d.push({prefix:r,method:e.toLowerCase(),value:o,args:s})),s=[],e=r=n=o=""};f();for(var p=0,g=t.length;g>p;p++)if(i=t[p],!(0===u&&c.indexOf(i)>-1)){switch(i){case'"':l?l===i&&(l=null):l=i;break;case"(":if(l)break;if(0===u){u=1,o+=i;continue}h++;break;case")":if(l)break;if(1===u){if(0===h){u=0,o+=i,f();continue}h--}break;case",":if(l)break;if(0===u){f();continue}if(1===u&&0===h&&!e.match(/^url$/i)){s.push(n),n="",o+=i;continue}}o+=i,0===u?e+=i:n+=i}return f(),d},u.Util.Bounds=function(t){var e,n={};return t.getBoundingClientRect&&(e=t.getBoundingClientRect(),n.top=e.top,n.bottom=e.bottom||e.top+e.height,n.left=e.left,n.width=t.offsetWidth,n.height=t.offsetHeight),n},u.Util.OffsetBounds=function(t){var e=t.offsetParent?u.Util.OffsetBounds(t.offsetParent):{top:0,left:0};return{top:t.offsetTop+e.top,bottom:t.offsetTop+t.offsetHeight+e.top,left:t.offsetLeft+e.left,width:t.offsetWidth,height:t.offsetHeight}},u.Util.getCSS=function(t,n,r){c!==t&&(d=e.defaultView.getComputedStyle(t,null));var i=d[n];if(/^background(Size|Position)$/.test(n))return o(i,t,n,r);if(/border(Top|Bottom)(Left|Right)Radius/.test(n)){var l=i.split(" ");return 1>=l.length&&(l[1]=l[0]),l.map(a)}return i},u.Util.resizeBounds=function(t,e,n,r,a){var o,i,l=n/r,s=t/e;return a&&"auto"!==a?s>l^"contain"===a?(i=r,o=r*s):(o=n,i=n/s):(o=n,i=r),{width:o,height:i}},u.Util.BackgroundPosition=function(t,e,n,r,a){var o=i("backgroundPosition",t,e,n,r,a);return{left:o[0],top:o[1]}},u.Util.BackgroundSize=function(t,e,n,r){var a=i("backgroundSize",t,e,n,r);return{width:a[0],height:a[1]}},u.Util.Extend=function(t,e){for(var n in t)t.hasOwnProperty(n)&&(e[n]=t[n]);return e},u.Util.Children=function(t){var e;try{e=t.nodeName&&"IFRAME"===t.nodeName.toUpperCase()?t.contentDocument||t.contentWindow.document:function(t){var e=[];return null!==t&&function(t,e){var r=t.length,a=0;if("number"==typeof e.length)for(var o=e.length;o>a;a++)t[r++]=e[a];else for(;e[a]!==n;)t[r++]=e[a++];return t.length=r,t}(e,t),e}(t.childNodes)}catch(r){u.Util.log("html2canvas.Util.Children failed with exception: "+r.message),e=[]}return e},u.Util.isTransparent=function(t){return"transparent"===t||"rgba(0, 0, 0, 0)"===t},u.Util.Font=function(){var t={};return function(e,r,a){if(t[e+"-"+r]!==n)return t[e+"-"+r];var o,i,l,s=a.createElement("div"),c=a.createElement("img"),d=a.createElement("span"),u="Hidden Text";return s.style.visibility="hidden",s.style.fontFamily=e,s.style.fontSize=r,s.style.margin=0,s.style.padding=0,a.body.appendChild(s),c.src="data:image/gif;base64,R0lGODlhAQABAIABAP///wAAACwAAAAAAQABAAACAkQBADs=",c.width=1,c.height=1,c.style.margin=0,c.style.padding=0,c.style.verticalAlign="baseline",d.style.fontFamily=e,d.style.fontSize=r,d.style.margin=0,d.style.padding=0,d.appendChild(a.createTextNode(u)),s.appendChild(d),s.appendChild(c),o=c.offsetTop-d.offsetTop+1,s.removeChild(d),s.appendChild(a.createTextNode(u)),s.style.lineHeight="normal",c.style.verticalAlign="super",i=c.offsetTop-s.offsetTop+1,l={baseline:o,lineWidth:1,middle:i},t[e+"-"+r]=l,a.body.removeChild(s),l}}(),function(){function t(t){return function(e){try{t.addColorStop(e.stop,e.color)}catch(r){n.log(["failed to add color stop: ",r,"; tried to add: ",e])}}}var n=u.Util,r={};u.Generate=r;var a=[/^(-webkit-linear-gradient)\(([a-z\s]+)([\w\d\.\s,%\(\)]+)\)$/,/^(-o-linear-gradient)\(([a-z\s]+)([\w\d\.\s,%\(\)]+)\)$/,/^(-webkit-gradient)\((linear|radial),\s((?:\d{1,3}%?)\s(?:\d{1,3}%?),\s(?:\d{1,3}%?)\s(?:\d{1,3}%?))([\w\d\.\s,%\(\)\-]+)\)$/,/^(-moz-linear-gradient)\(((?:\d{1,3}%?)\s(?:\d{1,3}%?))([\w\d\.\s,%\(\)]+)\)$/,/^(-webkit-radial-gradient)\(((?:\d{1,3}%?)\s(?:\d{1,3}%?)),\s(\w+)\s([a-z\-]+)([\w\d\.\s,%\(\)]+)\)$/,/^(-moz-radial-gradient)\(((?:\d{1,3}%?)\s(?:\d{1,3}%?)),\s(\w+)\s?([a-z\-]*)([\w\d\.\s,%\(\)]+)\)$/,/^(-o-radial-gradient)\(((?:\d{1,3}%?)\s(?:\d{1,3}%?)),\s(\w+)\s([a-z\-]+)([\w\d\.\s,%\(\)]+)\)$/];r.parseGradient=function(t,e){var n,r,o,i,l,s,c,d,u,h,f,p,g=a.length;for(r=0;g>r&&!(o=t.match(a[r]));r+=1);if(o)switch(o[1]){case"-webkit-linear-gradient":case"-o-linear-gradient":if(n={type:"linear",x0:null,y0:null,x1:null,y1:null,colorStops:[]},l=o[2].match(/\w+/g))for(s=l.length,r=0;s>r;r+=1)switch(l[r]){case"top":n.y0=0,n.y1=e.height;break;case"right":n.x0=e.width,n.x1=0;break;case"bottom":n.y0=e.height,n.y1=0;break;case"left":n.x0=0,n.x1=e.width}if(null===n.x0&&null===n.x1&&(n.x0=n.x1=e.width/2),null===n.y0&&null===n.y1&&(n.y0=n.y1=e.height/2),l=o[3].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)(?:\s\d{1,3}(?:%|px))?)+/g))for(s=l.length,c=1/Math.max(s-1,1),r=0;s>r;r+=1)d=l[r].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%|px)?/),d[2]?(i=parseFloat(d[2]),i/="%"===d[3]?100:e.width):i=r*c,n.colorStops.push({color:d[1],stop:i});break;case"-webkit-gradient":if(n={type:"radial"===o[2]?"circle":o[2],x0:0,y0:0,x1:0,y1:0,colorStops:[]},l=o[3].match(/(\d{1,3})%?\s(\d{1,3})%?,\s(\d{1,3})%?\s(\d{1,3})%?/),l&&(n.x0=l[1]*e.width/100,n.y0=l[2]*e.height/100,n.x1=l[3]*e.width/100,n.y1=l[4]*e.height/100),l=o[4].match(/((?:from|to|color-stop)\((?:[0-9\.]+,\s)?(?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)\))+/g))for(s=l.length,r=0;s>r;r+=1)d=l[r].match(/(from|to|color-stop)\(([0-9\.]+)?(?:,\s)?((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\)/),i=parseFloat(d[2]),"from"===d[1]&&(i=0),"to"===d[1]&&(i=1),n.colorStops.push({color:d[3],stop:i});break;case"-moz-linear-gradient":if(n={type:"linear",x0:0,y0:0,x1:0,y1:0,colorStops:[]},l=o[2].match(/(\d{1,3})%?\s(\d{1,3})%?/),l&&(n.x0=l[1]*e.width/100,n.y0=l[2]*e.height/100,n.x1=e.width-n.x0,n.y1=e.height-n.y0),l=o[3].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)(?:\s\d{1,3}%)?)+/g))for(s=l.length,c=1/Math.max(s-1,1),r=0;s>r;r+=1)d=l[r].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%)?/),d[2]?(i=parseFloat(d[2]),d[3]&&(i/=100)):i=r*c,n.colorStops.push({color:d[1],stop:i});break;case"-webkit-radial-gradient":case"-moz-radial-gradient":case"-o-radial-gradient":if(n={type:"circle",x0:0,y0:0,x1:e.width,y1:e.height,cx:0,cy:0,rx:0,ry:0,colorStops:[]},l=o[2].match(/(\d{1,3})%?\s(\d{1,3})%?/),l&&(n.cx=l[1]*e.width/100,n.cy=l[2]*e.height/100),l=o[3].match(/\w+/),d=o[4].match(/[a-z\-]*/),l&&d)switch(d[0]){case"farthest-corner":case"cover":case"":u=Math.sqrt(Math.pow(n.cx,2)+Math.pow(n.cy,2)),h=Math.sqrt(Math.pow(n.cx,2)+Math.pow(n.y1-n.cy,2)),f=Math.sqrt(Math.pow(n.x1-n.cx,2)+Math.pow(n.y1-n.cy,2)),p=Math.sqrt(Math.pow(n.x1-n.cx,2)+Math.pow(n.cy,2)),n.rx=n.ry=Math.max(u,h,f,p);break;case"closest-corner":u=Math.sqrt(Math.pow(n.cx,2)+Math.pow(n.cy,2)),h=Math.sqrt(Math.pow(n.cx,2)+Math.pow(n.y1-n.cy,2)),f=Math.sqrt(Math.pow(n.x1-n.cx,2)+Math.pow(n.y1-n.cy,2)),p=Math.sqrt(Math.pow(n.x1-n.cx,2)+Math.pow(n.cy,2)),n.rx=n.ry=Math.min(u,h,f,p);break;case"farthest-side":"circle"===l[0]?n.rx=n.ry=Math.max(n.cx,n.cy,n.x1-n.cx,n.y1-n.cy):(n.type=l[0],n.rx=Math.max(n.cx,n.x1-n.cx),n.ry=Math.max(n.cy,n.y1-n.cy));break;case"closest-side":case"contain":"circle"===l[0]?n.rx=n.ry=Math.min(n.cx,n.cy,n.x1-n.cx,n.y1-n.cy):(n.type=l[0],n.rx=Math.min(n.cx,n.x1-n.cx),n.ry=Math.min(n.cy,n.y1-n.cy))}if(l=o[5].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)(?:\s\d{1,3}(?:%|px))?)+/g))for(s=l.length,c=1/Math.max(s-1,1),r=0;s>r;r+=1)d=l[r].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%|px)?/),d[2]?(i=parseFloat(d[2]),i/="%"===d[3]?100:e.width):i=r*c,n.colorStops.push({color:d[1],stop:i})}return 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c=[];return{storage:c,width:a,height:b,clip:function(){c.push({type:"function",name:"clip",arguments:arguments})},translate:function(){c.push({type:"function",name:"translate",arguments:arguments})},fill:function(){c.push({type:"function",name:"fill",arguments:arguments})},save:function(){c.push({type:"function",name:"save",arguments:arguments})},restore:function(){c.push({type:"function",name:"restore",arguments:arguments})},fillRect:function(){c.push({type:"function",name:"fillRect",arguments:arguments})},createPattern:function(){c.push({type:"function",name:"createPattern",arguments:arguments})},drawShape:function(){var a=[];return c.push({type:"function",name:"drawShape",arguments:a}),{moveTo:function(){a.push({name:"moveTo",arguments:arguments})},lineTo:function(){a.push({name:"lineTo",arguments:arguments})},arcTo:function(){a.push({name:"arcTo",arguments:arguments})},bezierCurveTo:function(){a.push({name:"bezierCurveTo",arguments:arguments})},quadraticCurveTo:function(){a.push({name:"quadraticCurveTo",arguments:arguments})}}},drawImage:function(){c.push({type:"function",name:"drawImage",arguments:arguments})},fillText:function(){c.push({type:"function",name:"fillText",arguments:arguments})},setVariable:function(a,b){return c.push({type:"variable",name:a,arguments:b}),b}}}var i,j,k={};k.Util={},k.Util.log=function(b){k.logging&&a.console&&a.console.log&&a.console.log(b)},k.Util.trimText=function(a){return function(b){return a?a.apply(b):((b||"")+"").replace(/^\s+|\s+$/g,"")}}(String.prototype.trim),k.Util.asFloat=function(a){return parseFloat(a)},function(){var a=/((rgba|rgb)\([^\)]+\)(\s-?\d+px){0,})/g,b=/(-?\d+px)|(#.+)|(rgb\(.+\))|(rgba\(.+\))/g;k.Util.parseTextShadows=function(c){if(!c||"none"===c)return[];for(var d=c.match(a),e=[],f=0;d&&f0&&(d=b.substr(0,e),b=b.substr(e)),k.push({prefix:d,method:b.toLowerCase(),value:f,args:i})),i=[],b=d=c=f=""};n();for(var o=0,p=a.length;p>o;o++)if(g=a[o],!(0===l&&j.indexOf(g)>-1)){switch(g){case'"':h?h===g&&(h=null):h=g;break;case"(":if(h)break;if(0===l){l=1,f+=g;continue}m++;break;case")":if(h)break;if(1===l){if(0===m){l=0,f+=g,n();continue}m--}break;case",":if(h)break;if(0===l){n();continue}if(1===l&&0===m&&!b.match(/^url$/i)){i.push(c),c="",f+=g;continue}}f+=g,0===l?b+=g:c+=g}return n(),k},k.Util.Bounds=function(a){var b,c={};return a.getBoundingClientRect&&(b=a.getBoundingClientRect(),c.top=b.top,c.bottom=b.bottom||b.top+b.height,c.left=b.left,c.width=a.offsetWidth,c.height=a.offsetHeight),c},k.Util.OffsetBounds=function(a){var b=a.offsetParent?k.Util.OffsetBounds(a.offsetParent):{top:0,left:0};return{top:a.offsetTop+b.top,bottom:a.offsetTop+a.offsetHeight+b.top,left:a.offsetLeft+b.left,width:a.offsetWidth,height:a.offsetHeight}},k.Util.getCSS=function(a,c,d){i!==a&&(j=b.defaultView.getComputedStyle(a,null));var g=j[c];if(/^background(Size|Position)$/.test(c))return f(g,a,c,d);if(/border(Top|Bottom)(Left|Right)Radius/.test(c)){var h=g.split(" ");return h.length<=1&&(h[1]=h[0]),h.map(e)}return g},k.Util.resizeBounds=function(a,b,c,d,e){var f,g,h=c/d,i=a/b;return e&&"auto"!==e?i>h^"contain"===e?(g=d,f=d*i):(f=c,g=c/i):(f=c,g=d),{width:f,height:g}},k.Util.BackgroundPosition=function(a,b,c,d,e){var f=g("backgroundPosition",a,b,c,d,e);return{left:f[0],top:f[1]}},k.Util.BackgroundSize=function(a,b,c,d){var e=g("backgroundSize",a,b,c,d);return{width:e[0],height:e[1]}},k.Util.Extend=function(a,b){for(var c in a)a.hasOwnProperty(c)&&(b[c]=a[c]);return b},k.Util.Children=function(a){var b;try{b=a.nodeName&&"IFRAME"===a.nodeName.toUpperCase()?a.contentDocument||a.contentWindow.document:function(a){var b=[];return null!==a&&!function(a,b){var d=a.length,e=0;if("number"==typeof b.length)for(var f=b.length;f>e;e++)a[d++]=b[e];else for(;b[e]!==c;)a[d++]=b[e++];return a.length=d,a}(b,a),b}(a.childNodes)}catch(d){k.Util.log("html2canvas.Util.Children failed with exception: "+d.message),b=[]}return b},k.Util.isTransparent=function(a){return"transparent"===a||"rgba(0, 0, 0, 0)"===a},k.Util.Font=function(){var a={};return function(b,d,e){if(a[b+"-"+d]!==c)return a[b+"-"+d];var f,g,h,i=e.createElement("div"),j=e.createElement("img"),k=e.createElement("span"),l="Hidden Text";return i.style.visibility="hidden",i.style.fontFamily=b,i.style.fontSize=d,i.style.margin=0,i.style.padding=0,e.body.appendChild(i),j.src="data:image/gif;base64,R0lGODlhAQABAIABAP///wAAACwAAAAAAQABAAACAkQBADs=",j.width=1,j.height=1,j.style.margin=0,j.style.padding=0,j.style.verticalAlign="baseline",k.style.fontFamily=b,k.style.fontSize=d,k.style.margin=0,k.style.padding=0,k.appendChild(e.createTextNode(l)),i.appendChild(k),i.appendChild(j),f=j.offsetTop-k.offsetTop+1,i.removeChild(k),i.appendChild(e.createTextNode(l)),i.style.lineHeight="normal",j.style.verticalAlign="super",g=j.offsetTop-i.offsetTop+1,h={baseline:f,lineWidth:1,middle:g},a[b+"-"+d]=h,e.body.removeChild(i),h}}(),function(){function a(a){return function(b){try{a.addColorStop(b.stop,b.color)}catch(d){c.log(["failed to add color stop: ",d,"; tried to add: ",b])}}}var c=k.Util,d={};k.Generate=d;var e=[/^(-webkit-linear-gradient)\(([a-z\s]+)([\w\d\.\s,%\(\)]+)\)$/,/^(-o-linear-gradient)\(([a-z\s]+)([\w\d\.\s,%\(\)]+)\)$/,/^(-webkit-gradient)\((linear|radial),\s((?:\d{1,3}%?)\s(?:\d{1,3}%?),\s(?:\d{1,3}%?)\s(?:\d{1,3}%?))([\w\d\.\s,%\(\)\-]+)\)$/,/^(-moz-linear-gradient)\(((?:\d{1,3}%?)\s(?:\d{1,3}%?))([\w\d\.\s,%\(\)]+)\)$/,/^(-webkit-radial-gradient)\(((?:\d{1,3}%?)\s(?:\d{1,3}%?)),\s(\w+)\s([a-z\-]+)([\w\d\.\s,%\(\)]+)\)$/,/^(-moz-radial-gradient)\(((?:\d{1,3}%?)\s(?:\d{1,3}%?)),\s(\w+)\s?([a-z\-]*)([\w\d\.\s,%\(\)]+)\)$/,/^(-o-radial-gradient)\(((?:\d{1,3}%?)\s(?:\d{1,3}%?)),\s(\w+)\s([a-z\-]+)([\w\d\.\s,%\(\)]+)\)$/];d.parseGradient=function(a,b){var c,d,f,g,h,i,j,k,l,m,n,o,p=e.length;for(d=0;p>d&&!(f=a.match(e[d]));d+=1);if(f)switch(f[1]){case"-webkit-linear-gradient":case"-o-linear-gradient":if(c={type:"linear",x0:null,y0:null,x1:null,y1:null,colorStops:[]},h=f[2].match(/\w+/g))for(i=h.length,d=0;i>d;d+=1)switch(h[d]){case"top":c.y0=0,c.y1=b.height;break;case"right":c.x0=b.width,c.x1=0;break;case"bottom":c.y0=b.height,c.y1=0;break;case"left":c.x0=0,c.x1=b.width}if(null===c.x0&&null===c.x1&&(c.x0=c.x1=b.width/2),null===c.y0&&null===c.y1&&(c.y0=c.y1=b.height/2),h=f[3].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)(?:\s\d{1,3}(?:%|px))?)+/g))for(i=h.length,j=1/Math.max(i-1,1),d=0;i>d;d+=1)k=h[d].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%|px)?/),k[2]?(g=parseFloat(k[2]),g/="%"===k[3]?100:b.width):g=d*j,c.colorStops.push({color:k[1],stop:g});break;case"-webkit-gradient":if(c={type:"radial"===f[2]?"circle":f[2],x0:0,y0:0,x1:0,y1:0,colorStops:[]},h=f[3].match(/(\d{1,3})%?\s(\d{1,3})%?,\s(\d{1,3})%?\s(\d{1,3})%?/),h&&(c.x0=h[1]*b.width/100,c.y0=h[2]*b.height/100,c.x1=h[3]*b.width/100,c.y1=h[4]*b.height/100),h=f[4].match(/((?:from|to|color-stop)\((?:[0-9\.]+,\s)?(?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)\))+/g))for(i=h.length,d=0;i>d;d+=1)k=h[d].match(/(from|to|color-stop)\(([0-9\.]+)?(?:,\s)?((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\)/),g=parseFloat(k[2]),"from"===k[1]&&(g=0),"to"===k[1]&&(g=1),c.colorStops.push({color:k[3],stop:g});break;case"-moz-linear-gradient":if(c={type:"linear",x0:0,y0:0,x1:0,y1:0,colorStops:[]},h=f[2].match(/(\d{1,3})%?\s(\d{1,3})%?/),h&&(c.x0=h[1]*b.width/100,c.y0=h[2]*b.height/100,c.x1=b.width-c.x0,c.y1=b.height-c.y0),h=f[3].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)(?:\s\d{1,3}%)?)+/g))for(i=h.length,j=1/Math.max(i-1,1),d=0;i>d;d+=1)k=h[d].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%)?/),k[2]?(g=parseFloat(k[2]),k[3]&&(g/=100)):g=d*j,c.colorStops.push({color:k[1],stop:g});break;case"-webkit-radial-gradient":case"-moz-radial-gradient":case"-o-radial-gradient":if(c={type:"circle",x0:0,y0:0,x1:b.width,y1:b.height,cx:0,cy:0,rx:0,ry:0,colorStops:[]},h=f[2].match(/(\d{1,3})%?\s(\d{1,3})%?/),h&&(c.cx=h[1]*b.width/100,c.cy=h[2]*b.height/100),h=f[3].match(/\w+/),k=f[4].match(/[a-z\-]*/),h&&k)switch(k[0]){case"farthest-corner":case"cover":case"":l=Math.sqrt(Math.pow(c.cx,2)+Math.pow(c.cy,2)),m=Math.sqrt(Math.pow(c.cx,2)+Math.pow(c.y1-c.cy,2)),n=Math.sqrt(Math.pow(c.x1-c.cx,2)+Math.pow(c.y1-c.cy,2)),o=Math.sqrt(Math.pow(c.x1-c.cx,2)+Math.pow(c.cy,2)),c.rx=c.ry=Math.max(l,m,n,o);break;case"closest-corner":l=Math.sqrt(Math.pow(c.cx,2)+Math.pow(c.cy,2)),m=Math.sqrt(Math.pow(c.cx,2)+Math.pow(c.y1-c.cy,2)),n=Math.sqrt(Math.pow(c.x1-c.cx,2)+Math.pow(c.y1-c.cy,2)),o=Math.sqrt(Math.pow(c.x1-c.cx,2)+Math.pow(c.cy,2)),c.rx=c.ry=Math.min(l,m,n,o);break;case"farthest-side":"circle"===h[0]?c.rx=c.ry=Math.max(c.cx,c.cy,c.x1-c.cx,c.y1-c.cy):(c.type=h[0],c.rx=Math.max(c.cx,c.x1-c.cx),c.ry=Math.max(c.cy,c.y1-c.cy));break;case"closest-side":case"contain":"circle"===h[0]?c.rx=c.ry=Math.min(c.cx,c.cy,c.x1-c.cx,c.y1-c.cy):(c.type=h[0],c.rx=Math.min(c.cx,c.x1-c.cx),c.ry=Math.min(c.cy,c.y1-c.cy))}if(h=f[5].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)(?:\s\d{1,3}(?:%|px))?)+/g))for(i=h.length,j=1/Math.max(i-1,1),d=0;i>d;d+=1)k=h[d].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%|px)?/),k[2]?(g=parseFloat(k[2]),g/="%"===k[3]?100:b.width):g=d*j,c.colorStops.push({color:k[1],stop:g})}return c},d.Gradient=function(c,d){if(0!==d.width&&0!==d.height){var e,f,g=b.createElement("canvas"),h=g.getContext("2d");if(g.width=d.width,g.height=d.height,e=k.Generate.parseGradient(c,d))switch(e.type){case"linear":f=h.createLinearGradient(e.x0,e.y0,e.x1,e.y1),e.colorStops.forEach(a(f)),h.fillStyle=f,h.fillRect(0,0,d.width,d.height);break;case"circle":f=h.createRadialGradient(e.cx,e.cy,0,e.cx,e.cy,e.rx),e.colorStops.forEach(a(f)),h.fillStyle=f,h.fillRect(0,0,d.width,d.height);break;case"ellipse":var i=b.createElement("canvas"),j=i.getContext("2d"),l=Math.max(e.rx,e.ry),m=2*l;i.width=i.height=m,f=j.createRadialGradient(e.rx,e.ry,0,e.rx,e.ry,l),e.colorStops.forEach(a(f)),j.fillStyle=f,j.fillRect(0,0,m,m),h.fillStyle=e.colorStops[e.colorStops.length-1].color,h.fillRect(0,0,g.width,g.height),h.drawImage(i,e.cx-e.rx,e.cy-e.ry,2*e.rx,2*e.ry)}return g}},d.ListAlpha=function(a){var b,c="";do b=a%26,c=String.fromCharCode(b+64)+c,a/=26;while(26*a>26);return c},d.ListRoman=function(a){var b,c=["M","CM","D","CD","C","XC","L","XL","X","IX","V","IV","I"],d=[1e3,900,500,400,100,90,50,40,10,9,5,4,1],e="",f=c.length;if(0>=a||a>=4e3)return a;for(b=0;f>b;b+=1)for(;a>=d[b];)a-=d[b],e+=c[b];return e}}(),k.Parse=function(d,e,f){function g(){var a=rb(b.documentElement,"backgroundColor"),c=nb.isTransparent(a)&&kb===b.body,d=gb(kb,null,!1,c);jb(kb,d,null,function(){c&&(a=d.backgroundColor),nb.log("Done parsing, moving to Render."),qb.removeChild(tb),f({backgroundColor:a,stack:d})})}function i(){return Math.max(Math.max(mb.body.scrollWidth,mb.documentElement.scrollWidth),Math.max(mb.body.offsetWidth,mb.documentElement.offsetWidth),Math.max(mb.body.clientWidth,mb.documentElement.clientWidth))}function j(){return Math.max(Math.max(mb.body.scrollHeight,mb.documentElement.scrollHeight),Math.max(mb.body.offsetHeight,mb.documentElement.offsetHeight),Math.max(mb.body.clientHeight,mb.documentElement.clientHeight))}function l(a,b){var c=parseInt(rb(a,b),10);return isNaN(c)?0:c}function m(a,b,c,d,e,f){"transparent"!==f&&(a.setVariable("fillStyle",f),a.fillRect(b,c,d,e),lb+=1)}function n(a,b,c){return a.length>0?b+c.toUpperCase():void 0}function o(a,b){switch(b){case"lowercase":return a.toLowerCase();case"capitalize":return a.replace(/(^|\s|:|-|\(|\))([a-z])/g,n);case"uppercase":return a.toUpperCase();default:return a}}function p(a){return/^(normal|none|0px)$/.test(a)}function q(a,b,c,d){null!==a&&nb.trimText(a).length>0&&(d.fillText(a,b,c),lb+=1)}function r(a,b,c,d){var e=!1,f=rb(b,"fontWeight"),g=rb(b,"fontFamily"),h=rb(b,"fontSize"),i=nb.parseTextShadows(rb(b,"textShadow"));switch(parseInt(f,10)){case 401:f="bold";break;case 400:f="normal"}return a.setVariable("fillStyle",d),a.setVariable("font",[rb(b,"fontStyle"),rb(b,"fontVariant"),f,h,g].join(" ")),a.setVariable("textAlign",e?"right":"left"),i.length&&(a.setVariable("shadowColor",i[0].color),a.setVariable("shadowOffsetX",i[0].offsetX),a.setVariable("shadowOffsetY",i[0].offsetY),a.setVariable("shadowBlur",i[0].blur)),"none"!==c?nb.Font(g,h,mb):void 0}function s(a,b,c,d,e){switch(b){case"underline":m(a,c.left,Math.round(c.top+d.baseline+d.lineWidth),c.width,1,e);break;case"overline":m(a,c.left,Math.round(c.top),c.width,1,e);break;case"line-through":m(a,c.left,Math.ceil(c.top+d.middle+d.lineWidth),c.width,1,e)}}function t(a,b,c,d,e){var f;if(ob.rangeBounds&&!e)("none"!==c||0!==nb.trimText(b).length)&&(f=u(b,a.node,a.textOffset)),a.textOffset+=b.length;else if(a.node&&"string"==typeof a.node.nodeValue){var g=d?a.node.splitText(b.length):null;f=v(a.node,e),a.node=g}return f}function u(a,b,c){var d=mb.createRange();return d.setStart(b,c),d.setEnd(b,c+a.length),d.getBoundingClientRect()}function v(a,b){var 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f(d.renderer)(a,d,b,e(a.stack),k)},k.Util.Support=function(a,b){function d(){var a=new Image,d=b.createElement("canvas"),e=d.getContext===c?!1:d.getContext("2d");if(e===!1)return!1;d.width=d.height=10,a.src=["data:image/svg+xml,","","","
","sup","
","",""].join("");try{e.drawImage(a,0,0),d.toDataURL()}catch(f){return!1}return k.Util.log("html2canvas: Parse: SVG powered rendering available"),!0}function e(){var a,c,d,e,f=!1;return b.createRange&&(a=b.createRange(),a.getBoundingClientRect&&(c=b.createElement("boundtest"),c.style.height="123px",c.style.display="block",b.body.appendChild(c),a.selectNode(c),d=a.getBoundingClientRect(),e=d.height,123===e&&(f=!0),b.body.removeChild(c))),f}return{rangeBounds:e(),svgRendering:a.svgRendering&&d()}},a.html2canvas=function(b,c){b=b.length?b:[b];var d,e={logging:!1,elements:b,background:"#fff",proxy:null,timeout:0,useCORS:!1,allowTaint:!1,svgRendering:!1,ignoreElements:"IFRAME|OBJECT|PARAM",useOverflow:!0,letterRendering:!1,chinese:!1,width:null,height:null,taintTest:!0,renderer:"Canvas"};return e=k.Util.Extend(c,e),k.logging=e.logging,e.complete=function(a){("function"!=typeof e.onpreloaded||e.onpreloaded(a)!==!1)&&k.Parse(a,e,function(a){("function"!=typeof e.onparsed||e.onparsed(a)!==!1)&&(d=k.Renderer(a,e),"function"==typeof e.onrendered&&e.onrendered(d))})},a.setTimeout(function(){k.Preload(e)},0),{render:function(a,b){return k.Renderer(a,k.Util.Extend(b,e))},parse:function(a,b){return k.Parse(a,k.Util.Extend(b,e))},preload:function(a){return k.Preload(k.Util.Extend(a,e))},log:k.Util.log}},a.html2canvas.log=k.Util.log,a.html2canvas.Renderer={Canvas:c},k.Renderer.Canvas=function(a){function d(a,b){a.beginPath(),b.forEach(function(b){a[b.name].apply(a,b.arguments)}),a.closePath()}function e(a){if(-1===h.indexOf(a.arguments[0].src)){j.drawImage(a.arguments[0],0,0);try{j.getImageData(0,0,1,1)}catch(b){return i=g.createElement("canvas"),j=i.getContext("2d"),!1}h.push(a.arguments[0].src)}return!0}function f(b,c){switch(c.type){case"variable":b[c.name]=c.arguments;break;case"function":switch(c.name){case"createPattern":if(c.arguments[0].width>0&&c.arguments[0].height>0)try{b.fillStyle=b.createPattern(c.arguments[0],"repeat")}catch(f){l.log("html2canvas: Renderer: Error creating pattern",f.message)}break;case"drawShape":d(b,c.arguments);break;case"drawImage":c.arguments[8]>0&&c.arguments[7]>0&&(!a.taintTest||a.taintTest&&e(c))&&b.drawImage.apply(b,c.arguments);break;default:b[c.name].apply(b,c.arguments)}}}a=a||{};var g=b,h=[],i=b.createElement("canvas"),j=i.getContext("2d"),l=k.Util,m=a.canvas||g.createElement("canvas");return function(a,b,d,e,g){var h,i,j,k=m.getContext("2d"),n=a.stack;return m.width=m.style.width=b.width||n.ctx.width,m.height=m.style.height=b.height||n.ctx.height,j=k.fillStyle,k.fillStyle=l.isTransparent(n.backgroundColor)&&b.background!==c?b.background:a.backgroundColor,k.fillRect(0,0,m.width,m.height),k.fillStyle=j,e.forEach(function(a){k.textBaseline="bottom",k.save(),a.transform.matrix&&(k.translate(a.transform.origin[0],a.transform.origin[1]),k.transform.apply(k,a.transform.matrix),k.translate(-a.transform.origin[0],-a.transform.origin[1])),a.clip&&(k.beginPath(),k.rect(a.clip.left,a.clip.top,a.clip.width,a.clip.height),k.clip()),a.ctx.storage&&a.ctx.storage.forEach(function(a){f(k,a)}),k.restore()}),l.log("html2canvas: Renderer: Canvas renderer done - returning canvas obj"),1===b.elements.length&&"object"==typeof b.elements[0]&&"BODY"!==b.elements[0].nodeName?(i=g.Util.Bounds(b.elements[0]),h=d.createElement("canvas"),h.width=Math.ceil(i.width),h.height=Math.ceil(i.height),k=h.getContext("2d"),k.drawImage(m,i.left,i.top,i.width,i.height,0,0,i.width,i.height),m=null,h):m}}}(window,document); \ No newline at end of file diff --git a/src/Parse.js b/src/Parse.js index d155789..5519289 100644 --- a/src/Parse.js +++ b/src/Parse.js @@ -1,4 +1,4 @@ -_html2canvas.Parse = function (images, options) { +_html2canvas.Parse = function (images, options, cb) { window.scroll(0,0); var element = (( options.elements === undefined ) ? document.body : options.elements[0]), // select body by default @@ -19,6 +19,28 @@ _html2canvas.Parse = function (images, options) { images = images || {}; + function init() { + var background = getCSS(document.documentElement, "backgroundColor"), + transparentBackground = (Util.isTransparent(background) && element === document.body), + stack = renderElement(element, null, false, transparentBackground); + + parseChildren(element, stack, null, function() { + if (transparentBackground) { + background = stack.backgroundColor; + } + + Util.log('Done parsing, moving to Render.'); + + body.removeChild(hidePseudoElements); + cb({ + backgroundColor: background, + stack: stack + }); + }); + } + + init(); + function documentWidth () { return Math.max( Math.max(doc.body.scrollWidth, doc.documentElement.scrollWidth), @@ -336,6 +358,13 @@ _html2canvas.Parse = function (images, options) { } } + function h2czContext(zindex) { + return { + zindex: zindex, + children: [] + }; + } + function renderImage(ctx, element, image, bounds, borders) { var paddingLeft = getCSSInt(element, 'paddingLeft'), @@ -372,69 +401,67 @@ _html2canvas.Parse = function (images, options) { }); } - var getCurvePoints = (function(kappa) { - - return function(x, y, r1, r2) { - var ox = (r1) * kappa, // control point offset horizontal - oy = (r2) * kappa, // control point offset vertical - xm = x + r1, // x-middle - ym = y + r2; // y-middle - return { - topLeft: bezierCurve({ - x:x, - y:ym - }, { - x:x, - y:ym - oy - }, { - x:xm - ox, - y:y - }, { - x:xm, - y:y - }), - topRight: bezierCurve({ - x:x, - y:y - }, { - x:x + ox, - y:y - }, { - x:xm, - y:ym - oy - }, { - x:xm, - y:ym - }), - bottomRight: bezierCurve({ - x:xm, - y:y - }, { - x:xm, - y:y + oy - }, { - x:x + ox, - y:ym - }, { - x:x, - y:ym - }), - bottomLeft: bezierCurve({ - x:xm, - y:ym - }, { - x:xm - ox, - y:ym - }, { - x:x, - y:y + oy - }, { - x:x, - y:y - }) - }; + function getCurvePoints(x, y, r1, r2) { + var kappa = 4 * ((Math.sqrt(2) - 1) / 3); + var ox = (r1) * kappa, // control point offset horizontal + oy = (r2) * kappa, // control point offset vertical + xm = x + r1, // x-middle + ym = y + r2; // y-middle + return { + topLeft: bezierCurve({ + x:x, + y:ym + }, { + x:x, + y:ym - oy + }, { + x:xm - ox, + y:y + }, { + x:xm, + y:y + }), + topRight: bezierCurve({ + x:x, + y:y + }, { + x:x + ox, + y:y + }, { + x:xm, + y:ym - oy + }, { + x:xm, + y:ym + }), + bottomRight: bezierCurve({ + x:xm, + y:y + }, { + x:xm, + y:y + oy + }, { + x:x + ox, + y:ym + }, { + x:x, + y:ym + }), + bottomLeft: bezierCurve({ + x:xm, + y:ym + }, { + x:xm - ox, + y:ym + }, { + x:x, + y:y + oy + }, { + x:x, + y:y + }) }; - })(4 * ((Math.sqrt(2) - 1) / 3)); + } function bezierCurve(start, startControl, endControl, end) { @@ -953,9 +980,8 @@ _html2canvas.Parse = function (images, options) { return str.replace("px", ""); } - var transformRegExp = /(matrix)\((.+)\)/; - function getTransform(element, parentStack) { + var transformRegExp = /(matrix)\((.+)\)/; var transform = getCSS(element, "transform") || getCSS(element, "-webkit-transform") || getCSS(element, "-moz-transform") || getCSS(element, "-ms-transform") || getCSS(element, "-o-transform"); var transformOrigin = getCSS(element, "transform-origin") || getCSS(element, "-webkit-transform-origin") || getCSS(element, "-moz-transform-origin") || getCSS(element, "-ms-transform-origin") || getCSS(element, "-o-transform-origin") || "0px 0px"; @@ -1096,48 +1122,51 @@ _html2canvas.Parse = function (images, options) { return (getCSS(element, 'display') !== "none" && getCSS(element, 'visibility') !== "hidden" && !element.hasAttribute("data-html2canvas-ignore")); } - function parseElement (element, stack, pseudoElement) { + function parseElement (element, stack, pseudoElement, cb) { + if (!cb) { + cb = function(){}; + } if (isElementVisible(element)) { stack = renderElement(element, stack, pseudoElement, false) || stack; if (!ignoreElementsRegExp.test(element.nodeName)) { - parseChildren(element, stack, pseudoElement); + return parseChildren(element, stack, pseudoElement, cb); } } + cb(); } - function parseChildren(element, stack, pseudoElement) { - Util.Children(element).forEach(function(node) { + function parseChildren(element, stack, pseudoElement, cb) { + var children = Util.Children(element); + // After all nodes have processed, finished() will call the cb. + // We add one and kick it off so this will still work when children.length === 0. + // Note that unless async is true, this will happen synchronously, just will callbacks. + var jobs = children.length + 1; + finished(); + + if (options.async) { + children.forEach(function(node) { + // Don't block the page from rendering + setTimeout(function(){ parseNode(node); }, 0); + }); + } else { + children.forEach(parseNode); + } + + function parseNode(node) { if (node.nodeType === node.ELEMENT_NODE) { - parseElement(node, stack, pseudoElement); + parseElement(node, stack, pseudoElement, finished); } else if (node.nodeType === node.TEXT_NODE) { renderText(element, node, stack); + finished(); + } else { + finished(); + } + } + function finished(el) { + if (--jobs <= 0){ + Util.log("finished rendering " + children.length + " children."); + cb(); } - }); - } - - function init() { - var background = getCSS(document.documentElement, "backgroundColor"), - transparentBackground = (Util.isTransparent(background) && element === document.body), - stack = renderElement(element, null, false, transparentBackground); - parseChildren(element, stack); - - if (transparentBackground) { - background = stack.backgroundColor; } - - body.removeChild(hidePseudoElements); - return { - backgroundColor: background, - stack: stack - }; } - - return init(); -}; - -function h2czContext(zindex) { - return { - zindex: zindex, - children: [] - }; -} +}; \ No newline at end of file diff --git a/src/Util.js b/src/Util.js index 861402b..8ea63af 100644 --- a/src/Util.js +++ b/src/Util.js @@ -20,9 +20,9 @@ window.html2canvas = function(elements, opts) { useOverflow: true, letterRendering: false, chinese: false, + async: false, // If true, parsing will not block, but if the user scrolls during parse the image can get weird // render options - width: null, height: null, taintTest: true, // do a taint test with all images before applying to canvas @@ -39,21 +39,19 @@ window.html2canvas = function(elements, opts) { return; } } - queue = _html2canvas.Parse( images, options ); - - if (typeof options.onparsed === "function") { - if ( options.onparsed( queue ) === false ) { - return; + _html2canvas.Parse( images, options, function(queue) { + if (typeof options.onparsed === "function") { + if ( options.onparsed( queue ) === false ) { + return; + } } - } - - canvas = _html2canvas.Renderer( queue, options ); - - if (typeof options.onrendered === "function") { - options.onrendered( canvas ); - } + canvas = _html2canvas.Renderer( queue, options ); + if (typeof options.onrendered === "function") { + options.onrendered( canvas ); + } + }); }; // for pages without images, we still want this to be async, i.e. return methods before executing