--- /dev/null
+/*
+ html2canvas 0.4.1 <http://html2canvas.hertzen.com>
+ Copyright (c) 2013 Niklas von Hertzen
+
+ Released under MIT License
+*/
+
+(function(window, document, undefined){
+
+"use strict";
+
+var _html2canvas = {},
+previousElement,
+computedCSS,
+html2canvas;
+
+_html2canvas.Util = {};
+
+_html2canvas.Util.log = function(a) {
+ if (_html2canvas.logging && window.console && window.console.log) {
+ window.console.log(a);
+ }
+};
+
+_html2canvas.Util.trimText = (function(isNative){
+ return function(input) {
+ return isNative ? isNative.apply(input) : ((input || '') + '').replace( /^\s+|\s+$/g , '' );
+ };
+})(String.prototype.trim);
+
+_html2canvas.Util.asFloat = function(v) {
+ return parseFloat(v);
+};
+
+(function() {
+ // TODO: support all possible length values
+ var TEXT_SHADOW_PROPERTY = /((rgba|rgb)\([^\)]+\)(\s-?\d+px){0,})/g;
+ var TEXT_SHADOW_VALUES = /(-?\d+px)|(#.+)|(rgb\(.+\))|(rgba\(.+\))/g;
+ _html2canvas.Util.parseTextShadows = function (value) {
+ if (!value || value === 'none') {
+ return [];
+ }
+
+ // find multiple shadow declarations
+ var shadows = value.match(TEXT_SHADOW_PROPERTY),
+ results = [];
+ for (var i = 0; shadows && (i < shadows.length); i++) {
+ var s = shadows[i].match(TEXT_SHADOW_VALUES);
+ results.push({
+ color: s[0],
+ offsetX: s[1] ? s[1].replace('px', '') : 0,
+ offsetY: s[2] ? s[2].replace('px', '') : 0,
+ blur: s[3] ? s[3].replace('px', '') : 0
+ });
+ }
+ return results;
+ };
+})();
+
+
+_html2canvas.Util.parseBackgroundImage = function (value) {
+ var whitespace = ' \r\n\t',
+ method, definition, prefix, prefix_i, block, results = [],
+ c, mode = 0, numParen = 0, quote, args;
+
+ var appendResult = function(){
+ if(method) {
+ if(definition.substr( 0, 1 ) === '"') {
+ definition = definition.substr( 1, definition.length - 2 );
+ }
+ if(definition) {
+ args.push(definition);
+ }
+ if(method.substr( 0, 1 ) === '-' &&
+ (prefix_i = method.indexOf( '-', 1 ) + 1) > 0) {
+ prefix = method.substr( 0, prefix_i);
+ method = method.substr( prefix_i );
+ }
+ results.push({
+ prefix: prefix,
+ method: method.toLowerCase(),
+ value: block,
+ args: args
+ });
+ }
+ args = []; //for some odd reason, setting .length = 0 didn't work in safari
+ method =
+ prefix =
+ definition =
+ block = '';
+ };
+
+ appendResult();
+ for(var i = 0, ii = value.length; i<ii; i++) {
+ c = value[i];
+ if(mode === 0 && whitespace.indexOf( c ) > -1){
+ continue;
+ }
+ switch(c) {
+ case '"':
+ if(!quote) {
+ quote = c;
+ }
+ else if(quote === c) {
+ quote = null;
+ }
+ break;
+
+ case '(':
+ if(quote) { break; }
+ else if(mode === 0) {
+ mode = 1;
+ block += c;
+ continue;
+ } else {
+ numParen++;
+ }
+ break;
+
+ case ')':
+ if(quote) { break; }
+ else if(mode === 1) {
+ if(numParen === 0) {
+ mode = 0;
+ block += c;
+ appendResult();
+ continue;
+ } else {
+ numParen--;
+ }
+ }
+ break;
+
+ case ',':
+ if(quote) { break; }
+ else if(mode === 0) {
+ appendResult();
+ continue;
+ }
+ else if (mode === 1) {
+ if(numParen === 0 && !method.match(/^url$/i)) {
+ args.push(definition);
+ definition = '';
+ block += c;
+ continue;
+ }
+ }
+ break;
+ }
+
+ block += c;
+ if(mode === 0) { method += c; }
+ else { definition += c; }
+ }
+ appendResult();
+
+ return results;
+};
+
+_html2canvas.Util.Bounds = function (element) {
+ var clientRect, bounds = {};
+
+ if (element.getBoundingClientRect){
+ clientRect = element.getBoundingClientRect();
+
+ // TODO add scroll position to bounds, so no scrolling of window necessary
+ bounds.top = clientRect.top;
+ bounds.bottom = clientRect.bottom || (clientRect.top + clientRect.height);
+ bounds.left = clientRect.left;
+
+ bounds.width = element.offsetWidth;
+ bounds.height = element.offsetHeight;
+ }
+
+ return bounds;
+};
+
+// TODO ideally, we'd want everything to go through this function instead of Util.Bounds,
+// but would require further work to calculate the correct positions for elements with offsetParents
+_html2canvas.Util.OffsetBounds = function (element) {
+ var parent = element.offsetParent ? _html2canvas.Util.OffsetBounds(element.offsetParent) : {top: 0, left: 0};
+
+ return {
+ top: element.offsetTop + parent.top,
+ bottom: element.offsetTop + element.offsetHeight + parent.top,
+ left: element.offsetLeft + parent.left,
+ width: element.offsetWidth,
+ height: element.offsetHeight
+ };
+};
+
+function toPX(element, attribute, value ) {
+ var rsLeft = element.runtimeStyle && element.runtimeStyle[attribute],
+ left,
+ style = element.style;
+
+ // Check if we are not dealing with pixels, (Opera has issues with this)
+ // Ported from jQuery css.js
+ // From the awesome hack by Dean Edwards
+ // http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
+
+ // If we're not dealing with a regular pixel number
+ // but a number that has a weird ending, we need to convert it to pixels
+
+ if ( !/^-?[0-9]+\.?[0-9]*(?:px)?$/i.test( value ) && /^-?\d/.test(value) ) {
+ // Remember the original values
+ left = style.left;
+
+ // Put in the new values to get a computed value out
+ if (rsLeft) {
+ element.runtimeStyle.left = element.currentStyle.left;
+ }
+ style.left = attribute === "fontSize" ? "1em" : (value || 0);
+ value = style.pixelLeft + "px";
+
+ // Revert the changed values
+ style.left = left;
+ if (rsLeft) {
+ element.runtimeStyle.left = rsLeft;
+ }
+ }
+
+ if (!/^(thin|medium|thick)$/i.test(value)) {
+ return Math.round(parseFloat(value)) + "px";
+ }
+
+ return value;
+}
+
+function asInt(val) {
+ return parseInt(val, 10);
+}
+
+function parseBackgroundSizePosition(value, element, attribute, index) {
+ value = (value || '').split(',');
+ value = value[index || 0] || value[0] || 'auto';
+ value = _html2canvas.Util.trimText(value).split(' ');
+
+ if(attribute === 'backgroundSize' && (!value[0] || value[0].match(/cover|contain|auto/))) {
+ //these values will be handled in the parent function
+ } else {
+ value[0] = (value[0].indexOf( "%" ) === -1) ? toPX(element, attribute + "X", value[0]) : value[0];
+ if(value[1] === undefined) {
+ if(attribute === 'backgroundSize') {
+ value[1] = 'auto';
+ return value;
+ } else {
+ // IE 9 doesn't return double digit always
+ value[1] = value[0];
+ }
+ }
+ value[1] = (value[1].indexOf("%") === -1) ? toPX(element, attribute + "Y", value[1]) : value[1];
+ }
+ return value;
+}
+
+_html2canvas.Util.getCSS = function (element, attribute, index) {
+ if (previousElement !== element) {
+ computedCSS = document.defaultView.getComputedStyle(element, null);
+ }
+
+ var value = computedCSS[attribute];
+
+ if (/^background(Size|Position)$/.test(attribute)) {
+ return parseBackgroundSizePosition(value, element, attribute, index);
+ } else if (/border(Top|Bottom)(Left|Right)Radius/.test(attribute)) {
+ var arr = value.split(" ");
+ if (arr.length <= 1) {
+ arr[1] = arr[0];
+ }
+ return arr.map(asInt);
+ }
+
+ return value;
+};
+
+_html2canvas.Util.resizeBounds = function( current_width, current_height, target_width, target_height, stretch_mode ){
+ var target_ratio = target_width / target_height,
+ current_ratio = current_width / current_height,
+ output_width, output_height;
+
+ if(!stretch_mode || stretch_mode === 'auto') {
+ output_width = target_width;
+ output_height = target_height;
+ } else if(target_ratio < current_ratio ^ stretch_mode === 'contain') {
+ output_height = target_height;
+ output_width = target_height * current_ratio;
+ } else {
+ output_width = target_width;
+ output_height = target_width / current_ratio;
+ }
+
+ return {
+ width: output_width,
+ height: output_height
+ };
+};
+
+function backgroundBoundsFactory( prop, el, bounds, image, imageIndex, backgroundSize ) {
+ var bgposition = _html2canvas.Util.getCSS( el, prop, imageIndex ) ,
+ topPos,
+ left,
+ percentage,
+ val;
+
+ if (bgposition.length === 1){
+ val = bgposition[0];
+
+ bgposition = [];
+
+ bgposition[0] = val;
+ bgposition[1] = val;
+ }
+
+ if (bgposition[0].toString().indexOf("%") !== -1){
+ percentage = (parseFloat(bgposition[0])/100);
+ left = bounds.width * percentage;
+ if(prop !== 'backgroundSize') {
+ left -= (backgroundSize || image).width*percentage;
+ }
+ } else {
+ if(prop === 'backgroundSize') {
+ if(bgposition[0] === 'auto') {
+ left = image.width;
+ } else {
+ if (/contain|cover/.test(bgposition[0])) {
+ var resized = _html2canvas.Util.resizeBounds(image.width, image.height, bounds.width, bounds.height, bgposition[0]);
+ left = resized.width;
+ topPos = resized.height;
+ } else {
+ left = parseInt(bgposition[0], 10);
+ }
+ }
+ } else {
+ left = parseInt( bgposition[0], 10);
+ }
+ }
+
+
+ if(bgposition[1] === 'auto') {
+ topPos = left / image.width * image.height;
+ } else if (bgposition[1].toString().indexOf("%") !== -1){
+ percentage = (parseFloat(bgposition[1])/100);
+ topPos = bounds.height * percentage;
+ if(prop !== 'backgroundSize') {
+ topPos -= (backgroundSize || image).height * percentage;
+ }
+
+ } else {
+ topPos = parseInt(bgposition[1],10);
+ }
+
+ return [left, topPos];
+}
+
+_html2canvas.Util.BackgroundPosition = function( el, bounds, image, imageIndex, backgroundSize ) {
+ var result = backgroundBoundsFactory( 'backgroundPosition', el, bounds, image, imageIndex, backgroundSize );
+ return { left: result[0], top: result[1] };
+};
+
+_html2canvas.Util.BackgroundSize = function( el, bounds, image, imageIndex ) {
+ var result = backgroundBoundsFactory( 'backgroundSize', el, bounds, image, imageIndex );
+ return { width: result[0], height: result[1] };
+};
+
+_html2canvas.Util.Extend = function (options, defaults) {
+ for (var key in options) {
+ if (options.hasOwnProperty(key)) {
+ defaults[key] = options[key];
+ }
+ }
+ return defaults;
+};
+
+
+/*
+ * Derived from jQuery.contents()
+ * Copyright 2010, John Resig
+ * Dual licensed under the MIT or GPL Version 2 licenses.
+ * http://jquery.org/license
+ */
+_html2canvas.Util.Children = function( elem ) {
+ var children;
+ try {
+ children = (elem.nodeName && elem.nodeName.toUpperCase() === "IFRAME") ? elem.contentDocument || elem.contentWindow.document : (function(array) {
+ var ret = [];
+ if (array !== null) {
+ (function(first, second ) {
+ var i = first.length,
+ j = 0;
+
+ if (typeof second.length === "number") {
+ for (var l = second.length; j < l; j++) {
+ first[i++] = second[j];
+ }
+ } else {
+ while (second[j] !== undefined) {
+ first[i++] = second[j++];
+ }
+ }
+
+ first.length = i;
+
+ return first;
+ })(ret, array);
+ }
+ return ret;
+ })(elem.childNodes);
+
+ } catch (ex) {
+ _html2canvas.Util.log("html2canvas.Util.Children failed with exception: " + ex.message);
+ children = [];
+ }
+ return children;
+};
+
+_html2canvas.Util.isTransparent = function(backgroundColor) {
+ return (backgroundColor === "transparent" || backgroundColor === "rgba(0, 0, 0, 0)");
+};
+_html2canvas.Util.Font = (function () {
+
+ var fontData = {};
+
+ return function(font, fontSize, doc) {
+ if (fontData[font + "-" + fontSize] !== undefined) {
+ return fontData[font + "-" + fontSize];
+ }
+
+ var container = doc.createElement('div'),
+ img = doc.createElement('img'),
+ span = doc.createElement('span'),
+ sampleText = 'Hidden Text',
+ baseline,
+ middle,
+ metricsObj;
+
+ container.style.visibility = "hidden";
+ container.style.fontFamily = font;
+ container.style.fontSize = fontSize;
+ container.style.margin = 0;
+ container.style.padding = 0;
+
+ doc.body.appendChild(container);
+
+ // http://probablyprogramming.com/2009/03/15/the-tiniest-gif-ever (handtinywhite.gif)
+ img.src = "data:image/gif;base64,R0lGODlhAQABAIABAP///wAAACwAAAAAAQABAAACAkQBADs=";
+ img.width = 1;
+ img.height = 1;
+
+ img.style.margin = 0;
+ img.style.padding = 0;
+ img.style.verticalAlign = "baseline";
+
+ span.style.fontFamily = font;
+ span.style.fontSize = fontSize;
+ span.style.margin = 0;
+ span.style.padding = 0;
+
+ span.appendChild(doc.createTextNode(sampleText));
+ container.appendChild(span);
+ container.appendChild(img);
+ baseline = (img.offsetTop - span.offsetTop) + 1;
+
+ container.removeChild(span);
+ container.appendChild(doc.createTextNode(sampleText));
+
+ container.style.lineHeight = "normal";
+ img.style.verticalAlign = "super";
+
+ middle = (img.offsetTop-container.offsetTop) + 1;
+ metricsObj = {
+ baseline: baseline,
+ lineWidth: 1,
+ middle: middle
+ };
+
+ fontData[font + "-" + fontSize] = metricsObj;
+
+ doc.body.removeChild(container);
+
+ return metricsObj;
+ };
+})();
+
+(function(){
+ var Util = _html2canvas.Util,
+ Generate = {};
+
+ _html2canvas.Generate = Generate;
+
+ var reGradients = [
+ /^(-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,%\(\)]+)\)$/
+ ];
+
+ /*
+ * TODO: Add IE10 vendor prefix (-ms) support
+ * TODO: Add W3C gradient (linear-gradient) support
+ * TODO: Add old Webkit -webkit-gradient(radial, ...) support
+ * TODO: Maybe some RegExp optimizations are possible ;o)
+ */
+ Generate.parseGradient = function(css, bounds) {
+ var gradient, i, len = reGradients.length, m1, stop, m2, m2Len, step, m3, tl,tr,br,bl;
+
+ for(i = 0; i < len; i+=1){
+ m1 = css.match(reGradients[i]);
+ if(m1) {
+ break;
+ }
+ }
+
+ if(m1) {
+ switch(m1[1]) {
+ case '-webkit-linear-gradient':
+ case '-o-linear-gradient':
+
+ gradient = {
+ type: 'linear',
+ x0: null,
+ y0: null,
+ x1: null,
+ y1: null,
+ colorStops: []
+ };
+
+ // get coordinates
+ m2 = m1[2].match(/\w+/g);
+ if(m2){
+ m2Len = m2.length;
+ for(i = 0; i < m2Len; i+=1){
+ switch(m2[i]) {
+ case 'top':
+ gradient.y0 = 0;
+ gradient.y1 = bounds.height;
+ break;
+
+ case 'right':
+ gradient.x0 = bounds.width;
+ gradient.x1 = 0;
+ break;
+
+ case 'bottom':
+ gradient.y0 = bounds.height;
+ gradient.y1 = 0;
+ break;
+
+ case 'left':
+ gradient.x0 = 0;
+ gradient.x1 = bounds.width;
+ break;
+ }
+ }
+ }
+ if(gradient.x0 === null && gradient.x1 === null){ // center
+ gradient.x0 = gradient.x1 = bounds.width / 2;
+ }
+ if(gradient.y0 === null && gradient.y1 === null){ // center
+ gradient.y0 = gradient.y1 = bounds.height / 2;
+ }
+
+ // get colors and stops
+ m2 = m1[3].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)(?:\s\d{1,3}(?:%|px))?)+/g);
+ if(m2){
+ m2Len = m2.length;
+ step = 1 / Math.max(m2Len - 1, 1);
+ for(i = 0; i < m2Len; i+=1){
+ m3 = m2[i].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%|px)?/);
+ if(m3[2]){
+ stop = parseFloat(m3[2]);
+ if(m3[3] === '%'){
+ stop /= 100;
+ } else { // px - stupid opera
+ stop /= bounds.width;
+ }
+ } else {
+ stop = i * step;
+ }
+ gradient.colorStops.push({
+ color: m3[1],
+ stop: stop
+ });
+ }
+ }
+ break;
+
+ case '-webkit-gradient':
+
+ gradient = {
+ type: m1[2] === 'radial' ? 'circle' : m1[2], // TODO: Add radial gradient support for older mozilla definitions
+ x0: 0,
+ y0: 0,
+ x1: 0,
+ y1: 0,
+ colorStops: []
+ };
+
+ // get coordinates
+ m2 = m1[3].match(/(\d{1,3})%?\s(\d{1,3})%?,\s(\d{1,3})%?\s(\d{1,3})%?/);
+ if(m2){
+ gradient.x0 = (m2[1] * bounds.width) / 100;
+ gradient.y0 = (m2[2] * bounds.height) / 100;
+ gradient.x1 = (m2[3] * bounds.width) / 100;
+ gradient.y1 = (m2[4] * bounds.height) / 100;
+ }
+
+ // get colors and stops
+ m2 = m1[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);
+ if(m2){
+ m2Len = m2.length;
+ for(i = 0; i < m2Len; i+=1){
+ m3 = m2[i].match(/(from|to|color-stop)\(([0-9\.]+)?(?:,\s)?((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\)/);
+ stop = parseFloat(m3[2]);
+ if(m3[1] === 'from') {
+ stop = 0.0;
+ }
+ if(m3[1] === 'to') {
+ stop = 1.0;
+ }
+ gradient.colorStops.push({
+ color: m3[3],
+ stop: stop
+ });
+ }
+ }
+ break;
+
+ case '-moz-linear-gradient':
+
+ gradient = {
+ type: 'linear',
+ x0: 0,
+ y0: 0,
+ x1: 0,
+ y1: 0,
+ colorStops: []
+ };
+
+ // get coordinates
+ m2 = m1[2].match(/(\d{1,3})%?\s(\d{1,3})%?/);
+
+ // m2[1] == 0% -> left
+ // m2[1] == 50% -> center
+ // m2[1] == 100% -> right
+
+ // m2[2] == 0% -> top
+ // m2[2] == 50% -> center
+ // m2[2] == 100% -> bottom
+
+ if(m2){
+ gradient.x0 = (m2[1] * bounds.width) / 100;
+ gradient.y0 = (m2[2] * bounds.height) / 100;
+ gradient.x1 = bounds.width - gradient.x0;
+ gradient.y1 = bounds.height - gradient.y0;
+ }
+
+ // get colors and stops
+ m2 = m1[3].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)(?:\s\d{1,3}%)?)+/g);
+ if(m2){
+ m2Len = m2.length;
+ step = 1 / Math.max(m2Len - 1, 1);
+ for(i = 0; i < m2Len; i+=1){
+ m3 = m2[i].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%)?/);
+ if(m3[2]){
+ stop = parseFloat(m3[2]);
+ if(m3[3]){ // percentage
+ stop /= 100;
+ }
+ } else {
+ stop = i * step;
+ }
+ gradient.colorStops.push({
+ color: m3[1],
+ stop: stop
+ });
+ }
+ }
+ break;
+
+ case '-webkit-radial-gradient':
+ case '-moz-radial-gradient':
+ case '-o-radial-gradient':
+
+ gradient = {
+ type: 'circle',
+ x0: 0,
+ y0: 0,
+ x1: bounds.width,
+ y1: bounds.height,
+ cx: 0,
+ cy: 0,
+ rx: 0,
+ ry: 0,
+ colorStops: []
+ };
+
+ // center
+ m2 = m1[2].match(/(\d{1,3})%?\s(\d{1,3})%?/);
+ if(m2){
+ gradient.cx = (m2[1] * bounds.width) / 100;
+ gradient.cy = (m2[2] * bounds.height) / 100;
+ }
+
+ // size
+ m2 = m1[3].match(/\w+/);
+ m3 = m1[4].match(/[a-z\-]*/);
+ if(m2 && m3){
+ switch(m3[0]){
+ case 'farthest-corner':
+ case 'cover': // is equivalent to farthest-corner
+ case '': // mozilla removes "cover" from definition :(
+ tl = Math.sqrt(Math.pow(gradient.cx, 2) + Math.pow(gradient.cy, 2));
+ tr = Math.sqrt(Math.pow(gradient.cx, 2) + Math.pow(gradient.y1 - gradient.cy, 2));
+ br = Math.sqrt(Math.pow(gradient.x1 - gradient.cx, 2) + Math.pow(gradient.y1 - gradient.cy, 2));
+ bl = Math.sqrt(Math.pow(gradient.x1 - gradient.cx, 2) + Math.pow(gradient.cy, 2));
+ gradient.rx = gradient.ry = Math.max(tl, tr, br, bl);
+ break;
+ case 'closest-corner':
+ tl = Math.sqrt(Math.pow(gradient.cx, 2) + Math.pow(gradient.cy, 2));
+ tr = Math.sqrt(Math.pow(gradient.cx, 2) + Math.pow(gradient.y1 - gradient.cy, 2));
+ br = Math.sqrt(Math.pow(gradient.x1 - gradient.cx, 2) + Math.pow(gradient.y1 - gradient.cy, 2));
+ bl = Math.sqrt(Math.pow(gradient.x1 - gradient.cx, 2) + Math.pow(gradient.cy, 2));
+ gradient.rx = gradient.ry = Math.min(tl, tr, br, bl);
+ break;
+ case 'farthest-side':
+ if(m2[0] === 'circle'){
+ gradient.rx = gradient.ry = Math.max(
+ gradient.cx,
+ gradient.cy,
+ gradient.x1 - gradient.cx,
+ gradient.y1 - gradient.cy
+ );
+ } else { // ellipse
+
+ gradient.type = m2[0];
+
+ gradient.rx = Math.max(
+ gradient.cx,
+ gradient.x1 - gradient.cx
+ );
+ gradient.ry = Math.max(
+ gradient.cy,
+ gradient.y1 - gradient.cy
+ );
+ }
+ break;
+ case 'closest-side':
+ case 'contain': // is equivalent to closest-side
+ if(m2[0] === 'circle'){
+ gradient.rx = gradient.ry = Math.min(
+ gradient.cx,
+ gradient.cy,
+ gradient.x1 - gradient.cx,
+ gradient.y1 - gradient.cy
+ );
+ } else { // ellipse
+
+ gradient.type = m2[0];
+
+ gradient.rx = Math.min(
+ gradient.cx,
+ gradient.x1 - gradient.cx
+ );
+ gradient.ry = Math.min(
+ gradient.cy,
+ gradient.y1 - gradient.cy
+ );
+ }
+ break;
+
+ // TODO: add support for "30px 40px" sizes (webkit only)
+ }
+ }
+
+ // color stops
+ m2 = m1[5].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\)(?:\s\d{1,3}(?:%|px))?)+/g);
+ if(m2){
+ m2Len = m2.length;
+ step = 1 / Math.max(m2Len - 1, 1);
+ for(i = 0; i < m2Len; i+=1){
+ m3 = m2[i].match(/((?:rgb|rgba)\(\d{1,3},\s\d{1,3},\s\d{1,3}(?:,\s[0-9\.]+)?\))\s*(\d{1,3})?(%|px)?/);
+ if(m3[2]){
+ stop = parseFloat(m3[2]);
+ if(m3[3] === '%'){
+ stop /= 100;
+ } else { // px - stupid opera
+ stop /= bounds.width;
+ }
+ } else {
+ stop = i * step;
+ }
+ gradient.colorStops.push({
+ color: m3[1],
+ stop: stop
+ });
+ }
+ }
+ break;
+ }
+ }
+
+ return gradient;
+ };
+
+ function addScrollStops(grad) {
+ return function(colorStop) {
+ try {
+ grad.addColorStop(colorStop.stop, colorStop.color);
+ }
+ catch(e) {
+ Util.log(['failed to add color stop: ', e, '; tried to add: ', colorStop]);
+ }
+ };
+ }
+
+ Generate.Gradient = function(src, bounds) {
+ if(bounds.width === 0 || bounds.height === 0) {
+ return;
+ }
+
+ var canvas = document.createElement('canvas'),
+ ctx = canvas.getContext('2d'),
+ gradient, grad;
+
+ canvas.width = bounds.width;
+ canvas.height = bounds.height;
+
+ // TODO: add support for multi defined background gradients
+ gradient = _html2canvas.Generate.parseGradient(src, bounds);
+
+ if(gradient) {
+ switch(gradient.type) {
+ case 'linear':
+ grad = ctx.createLinearGradient(gradient.x0, gradient.y0, gradient.x1, gradient.y1);
+ gradient.colorStops.forEach(addScrollStops(grad));
+ ctx.fillStyle = grad;
+ ctx.fillRect(0, 0, bounds.width, bounds.height);
+ break;
+
+ case 'circle':
+ grad = ctx.createRadialGradient(gradient.cx, gradient.cy, 0, gradient.cx, gradient.cy, gradient.rx);
+ gradient.colorStops.forEach(addScrollStops(grad));
+ ctx.fillStyle = grad;
+ ctx.fillRect(0, 0, bounds.width, bounds.height);
+ break;
+
+ case 'ellipse':
+ var canvasRadial = document.createElement('canvas'),
+ ctxRadial = canvasRadial.getContext('2d'),
+ ri = Math.max(gradient.rx, gradient.ry),
+ di = ri * 2;
+
+ canvasRadial.width = canvasRadial.height = di;
+
+ grad = ctxRadial.createRadialGradient(gradient.rx, gradient.ry, 0, gradient.rx, gradient.ry, ri);
+ gradient.colorStops.forEach(addScrollStops(grad));
+
+ ctxRadial.fillStyle = grad;
+ ctxRadial.fillRect(0, 0, di, di);
+
+ ctx.fillStyle = gradient.colorStops[gradient.colorStops.length - 1].color;
+ ctx.fillRect(0, 0, canvas.width, canvas.height);
+ ctx.drawImage(canvasRadial, gradient.cx - gradient.rx, gradient.cy - gradient.ry, 2 * gradient.rx, 2 * gradient.ry);
+ break;
+ }
+ }
+
+ return canvas;
+ };
+
+ Generate.ListAlpha = function(number) {
+ var tmp = "",
+ modulus;
+
+ do {
+ modulus = number % 26;
+ tmp = String.fromCharCode((modulus) + 64) + tmp;
+ number = number / 26;
+ }while((number*26) > 26);
+
+ return tmp;
+ };
+
+ Generate.ListRoman = function(number) {
+ var romanArray = ["M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"],
+ decimal = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1],
+ roman = "",
+ v,
+ len = romanArray.length;
+
+ if (number <= 0 || number >= 4000) {
+ return number;
+ }
+
+ for (v=0; v < len; v+=1) {
+ while (number >= decimal[v]) {
+ number -= decimal[v];
+ roman += romanArray[v];
+ }
+ }
+
+ return roman;
+ };
+})();
+function h2cRenderContext(width, height) {
+ var storage = [];
+ return {
+ storage: storage,
+ width: width,
+ height: height,
+ clip: function() {
+ storage.push({
+ type: "function",
+ name: "clip",
+ 'arguments': arguments
+ });
+ },
+ translate: function() {
+ storage.push({
+ type: "function",
+ name: "translate",
+ 'arguments': arguments
+ });
+ },
+ fill: function() {
+ storage.push({
+ type: "function",
+ name: "fill",
+ 'arguments': arguments
+ });
+ },
+ save: function() {
+ storage.push({
+ type: "function",
+ name: "save",
+ 'arguments': arguments
+ });
+ },
+ restore: function() {
+ storage.push({
+ type: "function",
+ name: "restore",
+ 'arguments': arguments
+ });
+ },
+ fillRect: function () {
+ storage.push({
+ type: "function",
+ name: "fillRect",
+ 'arguments': arguments
+ });
+ },
+ createPattern: function() {
+ storage.push({
+ type: "function",
+ name: "createPattern",
+ 'arguments': arguments
+ });
+ },
+ drawShape: function() {
+
+ var shape = [];
+
+ storage.push({
+ type: "function",
+ name: "drawShape",
+ 'arguments': shape
+ });
+
+ return {
+ moveTo: function() {
+ shape.push({
+ name: "moveTo",
+ 'arguments': arguments
+ });
+ },
+ lineTo: function() {
+ shape.push({
+ name: "lineTo",
+ 'arguments': arguments
+ });
+ },
+ arcTo: function() {
+ shape.push({
+ name: "arcTo",
+ 'arguments': arguments
+ });
+ },
+ bezierCurveTo: function() {
+ shape.push({
+ name: "bezierCurveTo",
+ 'arguments': arguments
+ });
+ },
+ quadraticCurveTo: function() {
+ shape.push({
+ name: "quadraticCurveTo",
+ 'arguments': arguments
+ });
+ }
+ };
+
+ },
+ drawImage: function () {
+ storage.push({
+ type: "function",
+ name: "drawImage",
+ 'arguments': arguments
+ });
+ },
+ fillText: function () {
+ storage.push({
+ type: "function",
+ name: "fillText",
+ 'arguments': arguments
+ });
+ },
+ setVariable: function (variable, value) {
+ storage.push({
+ type: "variable",
+ name: variable,
+ 'arguments': value
+ });
+ return value;
+ }
+ };
+}
+_html2canvas.Parse = function (images, options) {
+ window.scroll(0,0);
+
+ var element = (( options.elements === undefined ) ? document.body : options.elements[0]), // select body by default
+ numDraws = 0,
+ doc = element.ownerDocument,
+ Util = _html2canvas.Util,
+ support = Util.Support(options, doc),
+ ignoreElementsRegExp = new RegExp("(" + options.ignoreElements + ")"),
+ body = doc.body,
+ getCSS = Util.getCSS,
+ pseudoHide = "___html2canvas___pseudoelement",
+ hidePseudoElements = doc.createElement('style');
+
+ hidePseudoElements.innerHTML = '.' + pseudoHide + '-before:before { content: "" !important; display: none !important; }' +
+ '.' + pseudoHide + '-after:after { content: "" !important; display: none !important; }';
+
+ body.appendChild(hidePseudoElements);
+
+ images = images || {};
+
+ function documentWidth () {
+ return Math.max(
+ Math.max(doc.body.scrollWidth, doc.documentElement.scrollWidth),
+ Math.max(doc.body.offsetWidth, doc.documentElement.offsetWidth),
+ Math.max(doc.body.clientWidth, doc.documentElement.clientWidth)
+ );
+ }
+
+ function documentHeight () {
+ return Math.max(
+ Math.max(doc.body.scrollHeight, doc.documentElement.scrollHeight),
+ Math.max(doc.body.offsetHeight, doc.documentElement.offsetHeight),
+ Math.max(doc.body.clientHeight, doc.documentElement.clientHeight)
+ );
+ }
+
+ function getCSSInt(element, attribute) {
+ var val = parseInt(getCSS(element, attribute), 10);
+ return (isNaN(val)) ? 0 : val; // borders in old IE are throwing 'medium' for demo.html
+ }
+
+ function renderRect (ctx, x, y, w, h, bgcolor) {
+ if (bgcolor !== "transparent"){
+ ctx.setVariable("fillStyle", bgcolor);
+ ctx.fillRect(x, y, w, h);
+ numDraws+=1;
+ }
+ }
+
+ function capitalize(m, p1, p2) {
+ if (m.length > 0) {
+ return p1 + p2.toUpperCase();
+ }
+ }
+
+ function textTransform (text, transform) {
+ switch(transform){
+ case "lowercase":
+ return text.toLowerCase();
+ case "capitalize":
+ return text.replace( /(^|\s|:|-|\(|\))([a-z])/g, capitalize);
+ case "uppercase":
+ return text.toUpperCase();
+ default:
+ return text;
+ }
+ }
+
+ function noLetterSpacing(letter_spacing) {
+ return (/^(normal|none|0px)$/.test(letter_spacing));
+ }
+
+ function drawText(currentText, x, y, ctx){
+ if (currentText !== null && Util.trimText(currentText).length > 0) {
+ ctx.fillText(currentText, x, y);
+ numDraws+=1;
+ }
+ }
+
+ function setTextVariables(ctx, el, text_decoration, color) {
+ var align = false,
+ bold = getCSS(el, "fontWeight"),
+ family = getCSS(el, "fontFamily"),
+ size = getCSS(el, "fontSize"),
+ shadows = Util.parseTextShadows(getCSS(el, "textShadow"));
+
+ switch(parseInt(bold, 10)){
+ case 401:
+ bold = "bold";
+ break;
+ case 400:
+ bold = "normal";
+ break;
+ }
+
+ ctx.setVariable("fillStyle", color);
+ ctx.setVariable("font", [getCSS(el, "fontStyle"), getCSS(el, "fontVariant"), bold, size, family].join(" "));
+ ctx.setVariable("textAlign", (align) ? "right" : "left");
+
+ if (shadows.length) {
+ // TODO: support multiple text shadows
+ // apply the first text shadow
+ ctx.setVariable("shadowColor", shadows[0].color);
+ ctx.setVariable("shadowOffsetX", shadows[0].offsetX);
+ ctx.setVariable("shadowOffsetY", shadows[0].offsetY);
+ ctx.setVariable("shadowBlur", shadows[0].blur);
+ }
+
+ if (text_decoration !== "none"){
+ return Util.Font(family, size, doc);
+ }
+ }
+
+ function renderTextDecoration(ctx, text_decoration, bounds, metrics, color) {
+ switch(text_decoration) {
+ case "underline":
+ // Draws a line at the baseline of the font
+ // TODO As some browsers display the line as more than 1px if the font-size is big, need to take that into account both in position and size
+ renderRect(ctx, bounds.left, Math.round(bounds.top + metrics.baseline + metrics.lineWidth), bounds.width, 1, color);
+ break;
+ case "overline":
+ renderRect(ctx, bounds.left, Math.round(bounds.top), bounds.width, 1, color);
+ break;
+ case "line-through":
+ // TODO try and find exact position for line-through
+ renderRect(ctx, bounds.left, Math.ceil(bounds.top + metrics.middle + metrics.lineWidth), bounds.width, 1, color);
+ break;
+ }
+ }
+
+ function getTextBounds(state, text, textDecoration, isLast, transform) {
+ var bounds;
+ if (support.rangeBounds && !transform) {
+ if (textDecoration !== "none" || Util.trimText(text).length !== 0) {
+ bounds = textRangeBounds(text, state.node, state.textOffset);
+ }
+ state.textOffset += text.length;
+ } else if (state.node && typeof state.node.nodeValue === "string" ){
+ var newTextNode = (isLast) ? state.node.splitText(text.length) : null;
+ bounds = textWrapperBounds(state.node, transform);
+ state.node = newTextNode;
+ }
+ return bounds;
+ }
+
+ function textRangeBounds(text, textNode, textOffset) {
+ var range = doc.createRange();
+ range.setStart(textNode, textOffset);
+ range.setEnd(textNode, textOffset + text.length);
+ return range.getBoundingClientRect();
+ }
+
+ function textWrapperBounds(oldTextNode, transform) {
+ var parent = oldTextNode.parentNode,
+ wrapElement = doc.createElement('wrapper'),
+ backupText = oldTextNode.cloneNode(true);
+
+ wrapElement.appendChild(oldTextNode.cloneNode(true));
+ parent.replaceChild(wrapElement, oldTextNode);
+
+ var bounds = transform ? Util.OffsetBounds(wrapElement) : Util.Bounds(wrapElement);
+ parent.replaceChild(backupText, wrapElement);
+ return bounds;
+ }
+
+ function renderText(el, textNode, stack) {
+ var ctx = stack.ctx,
+ color = getCSS(el, "color"),
+ textDecoration = getCSS(el, "textDecoration"),
+ textAlign = getCSS(el, "textAlign"),
+ metrics,
+ textList,
+ state = {
+ node: textNode,
+ textOffset: 0
+ };
+
+ if (Util.trimText(textNode.nodeValue).length > 0) {
+ textNode.nodeValue = textTransform(textNode.nodeValue, getCSS(el, "textTransform"));
+ textAlign = textAlign.replace(["-webkit-auto"],["auto"]);
+
+ textList = (!options.letterRendering && /^(left|right|justify|auto)$/.test(textAlign) && noLetterSpacing(getCSS(el, "letterSpacing"))) ?
+ textNode.nodeValue.split(/(\b| )/)
+ : textNode.nodeValue.split("");
+
+ metrics = setTextVariables(ctx, el, textDecoration, color);
+
+ if (options.chinese) {
+ textList.forEach(function(word, index) {
+ if (/.*[\u4E00-\u9FA5].*$/.test(word)) {
+ word = word.split("");
+ word.unshift(index, 1);
+ textList.splice.apply(textList, word);
+ }
+ });
+ }
+
+ textList.forEach(function(text, index) {
+ var bounds = getTextBounds(state, text, textDecoration, (index < textList.length - 1), stack.transform.matrix);
+ if (bounds) {
+ drawText(text, bounds.left, bounds.bottom, ctx);
+ renderTextDecoration(ctx, textDecoration, bounds, metrics, color);
+ }
+ });
+ }
+ }
+
+ function listPosition (element, val) {
+ var boundElement = doc.createElement( "boundelement" ),
+ originalType,
+ bounds;
+
+ boundElement.style.display = "inline";
+
+ originalType = element.style.listStyleType;
+ element.style.listStyleType = "none";
+
+ boundElement.appendChild(doc.createTextNode(val));
+
+ element.insertBefore(boundElement, element.firstChild);
+
+ bounds = Util.Bounds(boundElement);
+ element.removeChild(boundElement);
+ element.style.listStyleType = originalType;
+ return bounds;
+ }
+
+ function elementIndex(el) {
+ var i = -1,
+ count = 1,
+ childs = el.parentNode.childNodes;
+
+ if (el.parentNode) {
+ while(childs[++i] !== el) {
+ if (childs[i].nodeType === 1) {
+ count++;
+ }
+ }
+ return count;
+ } else {
+ return -1;
+ }
+ }
+
+ function listItemText(element, type) {
+ var currentIndex = elementIndex(element), text;
+ switch(type){
+ case "decimal":
+ text = currentIndex;
+ break;
+ case "decimal-leading-zero":
+ text = (currentIndex.toString().length === 1) ? currentIndex = "0" + currentIndex.toString() : currentIndex.toString();
+ break;
+ case "upper-roman":
+ text = _html2canvas.Generate.ListRoman( currentIndex );
+ break;
+ case "lower-roman":
+ text = _html2canvas.Generate.ListRoman( currentIndex ).toLowerCase();
+ break;
+ case "lower-alpha":
+ text = _html2canvas.Generate.ListAlpha( currentIndex ).toLowerCase();
+ break;
+ case "upper-alpha":
+ text = _html2canvas.Generate.ListAlpha( currentIndex );
+ break;
+ }
+
+ return text + ". ";
+ }
+
+ function renderListItem(element, stack, elBounds) {
+ var x,
+ text,
+ ctx = stack.ctx,
+ type = getCSS(element, "listStyleType"),
+ listBounds;
+
+ if (/^(decimal|decimal-leading-zero|upper-alpha|upper-latin|upper-roman|lower-alpha|lower-greek|lower-latin|lower-roman)$/i.test(type)) {
+ text = listItemText(element, type);
+ listBounds = listPosition(element, text);
+ setTextVariables(ctx, element, "none", getCSS(element, "color"));
+
+ if (getCSS(element, "listStylePosition") === "inside") {
+ ctx.setVariable("textAlign", "left");
+ x = elBounds.left;
+ } else {
+ return;
+ }
+
+ drawText(text, x, listBounds.bottom, ctx);
+ }
+ }
+
+ function loadImage (src){
+ var img = images[src];
+ return (img && img.succeeded === true) ? img.img : false;
+ }
+
+ function clipBounds(src, dst){
+ var x = Math.max(src.left, dst.left),
+ y = Math.max(src.top, dst.top),
+ x2 = Math.min((src.left + src.width), (dst.left + dst.width)),
+ y2 = Math.min((src.top + src.height), (dst.top + dst.height));
+
+ return {
+ left:x,
+ top:y,
+ width:x2-x,
+ height:y2-y
+ };
+ }
+
+ function setZ(element, stack, parentStack){
+ var newContext,
+ isPositioned = stack.cssPosition !== 'static',
+ zIndex = isPositioned ? getCSS(element, 'zIndex') : 'auto',
+ opacity = getCSS(element, 'opacity'),
+ isFloated = getCSS(element, 'cssFloat') !== 'none';
+
+ // https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Understanding_z_index/The_stacking_context
+ // When a new stacking context should be created:
+ // the root element (HTML),
+ // positioned (absolutely or relatively) with a z-index value other than "auto",
+ // elements with an opacity value less than 1. (See the specification for opacity),
+ // on mobile WebKit and Chrome 22+, position: fixed always creates a new stacking context, even when z-index is "auto" (See this post)
+
+ stack.zIndex = newContext = h2czContext(zIndex);
+ newContext.isPositioned = isPositioned;
+ newContext.isFloated = isFloated;
+ newContext.opacity = opacity;
+ newContext.ownStacking = (zIndex !== 'auto' || opacity < 1);
+
+ if (parentStack) {
+ parentStack.zIndex.children.push(stack);
+ }
+ }
+
+ function renderImage(ctx, element, image, bounds, borders) {
+
+ var paddingLeft = getCSSInt(element, 'paddingLeft'),
+ paddingTop = getCSSInt(element, 'paddingTop'),
+ paddingRight = getCSSInt(element, 'paddingRight'),
+ paddingBottom = getCSSInt(element, 'paddingBottom');
+
+ drawImage(
+ ctx,
+ image,
+ 0, //sx
+ 0, //sy
+ image.width, //sw
+ image.height, //sh
+ bounds.left + paddingLeft + borders[3].width, //dx
+ bounds.top + paddingTop + borders[0].width, // dy
+ bounds.width - (borders[1].width + borders[3].width + paddingLeft + paddingRight), //dw
+ bounds.height - (borders[0].width + borders[2].width + paddingTop + paddingBottom) //dh
+ );
+ }
+
+ function getBorderData(element) {
+ return ["Top", "Right", "Bottom", "Left"].map(function(side) {
+ return {
+ width: getCSSInt(element, 'border' + side + 'Width'),
+ color: getCSS(element, 'border' + side + 'Color')
+ };
+ });
+ }
+
+ function getBorderRadiusData(element) {
+ return ["TopLeft", "TopRight", "BottomRight", "BottomLeft"].map(function(side) {
+ return getCSS(element, 'border' + side + 'Radius');
+ });
+ }
+
+ 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
+ })
+ };
+ };
+ })(4 * ((Math.sqrt(2) - 1) / 3));
+
+ function bezierCurve(start, startControl, endControl, end) {
+
+ var lerp = function (a, b, t) {
+ return {
+ x:a.x + (b.x - a.x) * t,
+ y:a.y + (b.y - a.y) * t
+ };
+ };
+
+ return {
+ start: start,
+ startControl: startControl,
+ endControl: endControl,
+ end: end,
+ subdivide: function(t) {
+ var ab = lerp(start, startControl, t),
+ bc = lerp(startControl, endControl, t),
+ cd = lerp(endControl, end, t),
+ abbc = lerp(ab, bc, t),
+ bccd = lerp(bc, cd, t),
+ dest = lerp(abbc, bccd, t);
+ return [bezierCurve(start, ab, abbc, dest), bezierCurve(dest, bccd, cd, end)];
+ },
+ curveTo: function(borderArgs) {
+ borderArgs.push(["bezierCurve", startControl.x, startControl.y, endControl.x, endControl.y, end.x, end.y]);
+ },
+ curveToReversed: function(borderArgs) {
+ borderArgs.push(["bezierCurve", endControl.x, endControl.y, startControl.x, startControl.y, start.x, start.y]);
+ }
+ };
+ }
+
+ function parseCorner(borderArgs, radius1, radius2, corner1, corner2, x, y) {
+ if (radius1[0] > 0 || radius1[1] > 0) {
+ borderArgs.push(["line", corner1[0].start.x, corner1[0].start.y]);
+ corner1[0].curveTo(borderArgs);
+ corner1[1].curveTo(borderArgs);
+ } else {
+ borderArgs.push(["line", x, y]);
+ }
+
+ if (radius2[0] > 0 || radius2[1] > 0) {
+ borderArgs.push(["line", corner2[0].start.x, corner2[0].start.y]);
+ }
+ }
+
+ function drawSide(borderData, radius1, radius2, outer1, inner1, outer2, inner2) {
+ var borderArgs = [];
+
+ if (radius1[0] > 0 || radius1[1] > 0) {
+ borderArgs.push(["line", outer1[1].start.x, outer1[1].start.y]);
+ outer1[1].curveTo(borderArgs);
+ } else {
+ borderArgs.push([ "line", borderData.c1[0], borderData.c1[1]]);
+ }
+
+ if (radius2[0] > 0 || radius2[1] > 0) {
+ borderArgs.push(["line", outer2[0].start.x, outer2[0].start.y]);
+ outer2[0].curveTo(borderArgs);
+ borderArgs.push(["line", inner2[0].end.x, inner2[0].end.y]);
+ inner2[0].curveToReversed(borderArgs);
+ } else {
+ borderArgs.push([ "line", borderData.c2[0], borderData.c2[1]]);
+ borderArgs.push([ "line", borderData.c3[0], borderData.c3[1]]);
+ }
+
+ if (radius1[0] > 0 || radius1[1] > 0) {
+ borderArgs.push(["line", inner1[1].end.x, inner1[1].end.y]);
+ inner1[1].curveToReversed(borderArgs);
+ } else {
+ borderArgs.push([ "line", borderData.c4[0], borderData.c4[1]]);
+ }
+
+ return borderArgs;
+ }
+
+ function calculateCurvePoints(bounds, borderRadius, borders) {
+
+ var x = bounds.left,
+ y = bounds.top,
+ width = bounds.width,
+ height = bounds.height,
+
+ tlh = borderRadius[0][0],
+ tlv = borderRadius[0][1],
+ trh = borderRadius[1][0],
+ trv = borderRadius[1][1],
+ brh = borderRadius[2][0],
+ brv = borderRadius[2][1],
+ blh = borderRadius[3][0],
+ blv = borderRadius[3][1],
+
+ topWidth = width - trh,
+ rightHeight = height - brv,
+ bottomWidth = width - brh,
+ leftHeight = height - blv;
+
+ return {
+ topLeftOuter: getCurvePoints(
+ x,
+ y,
+ tlh,
+ tlv
+ ).topLeft.subdivide(0.5),
+
+ topLeftInner: getCurvePoints(
+ x + borders[3].width,
+ y + borders[0].width,
+ Math.max(0, tlh - borders[3].width),
+ Math.max(0, tlv - borders[0].width)
+ ).topLeft.subdivide(0.5),
+
+ topRightOuter: getCurvePoints(
+ x + topWidth,
+ y,
+ trh,
+ trv
+ ).topRight.subdivide(0.5),
+
+ topRightInner: getCurvePoints(
+ x + Math.min(topWidth, width + borders[3].width),
+ y + borders[0].width,
+ (topWidth > width + borders[3].width) ? 0 :trh - borders[3].width,
+ trv - borders[0].width
+ ).topRight.subdivide(0.5),
+
+ bottomRightOuter: getCurvePoints(
+ x + bottomWidth,
+ y + rightHeight,
+ brh,
+ brv
+ ).bottomRight.subdivide(0.5),
+
+ bottomRightInner: getCurvePoints(
+ x + Math.min(bottomWidth, width + borders[3].width),
+ y + Math.min(rightHeight, height + borders[0].width),
+ Math.max(0, brh - borders[1].width),
+ Math.max(0, brv - borders[2].width)
+ ).bottomRight.subdivide(0.5),
+
+ bottomLeftOuter: getCurvePoints(
+ x,
+ y + leftHeight,
+ blh,
+ blv
+ ).bottomLeft.subdivide(0.5),
+
+ bottomLeftInner: getCurvePoints(
+ x + borders[3].width,
+ y + leftHeight,
+ Math.max(0, blh - borders[3].width),
+ Math.max(0, blv - borders[2].width)
+ ).bottomLeft.subdivide(0.5)
+ };
+ }
+
+ function getBorderClip(element, borderPoints, borders, radius, bounds) {
+ var backgroundClip = getCSS(element, 'backgroundClip'),
+ borderArgs = [];
+
+ switch(backgroundClip) {
+ case "content-box":
+ case "padding-box":
+ parseCorner(borderArgs, radius[0], radius[1], borderPoints.topLeftInner, borderPoints.topRightInner, bounds.left + borders[3].width, bounds.top + borders[0].width);
+ parseCorner(borderArgs, radius[1], radius[2], borderPoints.topRightInner, borderPoints.bottomRightInner, bounds.left + bounds.width - borders[1].width, bounds.top + borders[0].width);
+ parseCorner(borderArgs, radius[2], radius[3], borderPoints.bottomRightInner, borderPoints.bottomLeftInner, bounds.left + bounds.width - borders[1].width, bounds.top + bounds.height - borders[2].width);
+ parseCorner(borderArgs, radius[3], radius[0], borderPoints.bottomLeftInner, borderPoints.topLeftInner, bounds.left + borders[3].width, bounds.top + bounds.height - borders[2].width);
+ break;
+
+ default:
+ parseCorner(borderArgs, radius[0], radius[1], borderPoints.topLeftOuter, borderPoints.topRightOuter, bounds.left, bounds.top);
+ parseCorner(borderArgs, radius[1], radius[2], borderPoints.topRightOuter, borderPoints.bottomRightOuter, bounds.left + bounds.width, bounds.top);
+ parseCorner(borderArgs, radius[2], radius[3], borderPoints.bottomRightOuter, borderPoints.bottomLeftOuter, bounds.left + bounds.width, bounds.top + bounds.height);
+ parseCorner(borderArgs, radius[3], radius[0], borderPoints.bottomLeftOuter, borderPoints.topLeftOuter, bounds.left, bounds.top + bounds.height);
+ break;
+ }
+
+ return borderArgs;
+ }
+
+ function parseBorders(element, bounds, borders){
+ var x = bounds.left,
+ y = bounds.top,
+ width = bounds.width,
+ height = bounds.height,
+ borderSide,
+ bx,
+ by,
+ bw,
+ bh,
+ borderArgs,
+ // http://www.w3.org/TR/css3-background/#the-border-radius
+ borderRadius = getBorderRadiusData(element),
+ borderPoints = calculateCurvePoints(bounds, borderRadius, borders),
+ borderData = {
+ clip: getBorderClip(element, borderPoints, borders, borderRadius, bounds),
+ borders: []
+ };
+
+ for (borderSide = 0; borderSide < 4; borderSide++) {
+
+ if (borders[borderSide].width > 0) {
+ bx = x;
+ by = y;
+ bw = width;
+ bh = height - (borders[2].width);
+
+ switch(borderSide) {
+ case 0:
+ // top border
+ bh = borders[0].width;
+
+ borderArgs = drawSide({
+ c1: [bx, by],
+ c2: [bx + bw, by],
+ c3: [bx + bw - borders[1].width, by + bh],
+ c4: [bx + borders[3].width, by + bh]
+ }, borderRadius[0], borderRadius[1],
+ borderPoints.topLeftOuter, borderPoints.topLeftInner, borderPoints.topRightOuter, borderPoints.topRightInner);
+ break;
+ case 1:
+ // right border
+ bx = x + width - (borders[1].width);
+ bw = borders[1].width;
+
+ borderArgs = drawSide({
+ c1: [bx + bw, by],
+ c2: [bx + bw, by + bh + borders[2].width],
+ c3: [bx, by + bh],
+ c4: [bx, by + borders[0].width]
+ }, borderRadius[1], borderRadius[2],
+ borderPoints.topRightOuter, borderPoints.topRightInner, borderPoints.bottomRightOuter, borderPoints.bottomRightInner);
+ break;
+ case 2:
+ // bottom border
+ by = (by + height) - (borders[2].width);
+ bh = borders[2].width;
+
+ borderArgs = drawSide({
+ c1: [bx + bw, by + bh],
+ c2: [bx, by + bh],
+ c3: [bx + borders[3].width, by],
+ c4: [bx + bw - borders[3].width, by]
+ }, borderRadius[2], borderRadius[3],
+ borderPoints.bottomRightOuter, borderPoints.bottomRightInner, borderPoints.bottomLeftOuter, borderPoints.bottomLeftInner);
+ break;
+ case 3:
+ // left border
+ bw = borders[3].width;
+
+ borderArgs = drawSide({
+ c1: [bx, by + bh + borders[2].width],
+ c2: [bx, by],
+ c3: [bx + bw, by + borders[0].width],
+ c4: [bx + bw, by + bh]
+ }, borderRadius[3], borderRadius[0],
+ borderPoints.bottomLeftOuter, borderPoints.bottomLeftInner, borderPoints.topLeftOuter, borderPoints.topLeftInner);
+ break;
+ }
+
+ borderData.borders.push({
+ args: borderArgs,
+ color: borders[borderSide].color
+ });
+
+ }
+ }
+
+ return borderData;
+ }
+
+ function createShape(ctx, args) {
+ var shape = ctx.drawShape();
+ args.forEach(function(border, index) {
+ shape[(index === 0) ? "moveTo" : border[0] + "To" ].apply(null, border.slice(1));
+ });
+ return shape;
+ }
+
+ function renderBorders(ctx, borderArgs, color) {
+ if (color !== "transparent") {
+ ctx.setVariable( "fillStyle", color);
+ createShape(ctx, borderArgs);
+ ctx.fill();
+ numDraws+=1;
+ }
+ }
+
+ function renderFormValue (el, bounds, stack){
+
+ var valueWrap = doc.createElement('valuewrap'),
+ cssPropertyArray = ['lineHeight','textAlign','fontFamily','color','fontSize','paddingLeft','paddingTop','width','height','border','borderLeftWidth','borderTopWidth'],
+ textValue,
+ textNode;
+
+ cssPropertyArray.forEach(function(property) {
+ try {
+ valueWrap.style[property] = getCSS(el, property);
+ } catch(e) {
+ // Older IE has issues with "border"
+ Util.log("html2canvas: Parse: Exception caught in renderFormValue: " + e.message);
+ }
+ });
+
+ valueWrap.style.borderColor = "black";
+ valueWrap.style.borderStyle = "solid";
+ valueWrap.style.display = "block";
+ valueWrap.style.position = "absolute";
+
+ if (/^(submit|reset|button|text|password)$/.test(el.type) || el.nodeName === "SELECT"){
+ valueWrap.style.lineHeight = getCSS(el, "height");
+ }
+
+ valueWrap.style.top = bounds.top + "px";
+ valueWrap.style.left = bounds.left + "px";
+
+ textValue = (el.nodeName === "SELECT") ? (el.options[el.selectedIndex] || 0).text : el.value;
+ if(!textValue) {
+ textValue = el.placeholder;
+ }
+
+ textNode = doc.createTextNode(textValue);
+
+ valueWrap.appendChild(textNode);
+ body.appendChild(valueWrap);
+
+ renderText(el, textNode, stack);
+ body.removeChild(valueWrap);
+ }
+
+ function drawImage (ctx) {
+ ctx.drawImage.apply(ctx, Array.prototype.slice.call(arguments, 1));
+ numDraws+=1;
+ }
+
+ function getPseudoElement(el, which) {
+ var elStyle = window.getComputedStyle(el, which);
+ if(!elStyle || !elStyle.content || elStyle.content === "none" || elStyle.content === "-moz-alt-content" || elStyle.display === "none") {
+ return;
+ }
+ var content = elStyle.content + '',
+ first = content.substr( 0, 1 );
+ //strips quotes
+ if(first === content.substr( content.length - 1 ) && first.match(/'|"/)) {
+ content = content.substr( 1, content.length - 2 );
+ }
+
+ var isImage = content.substr( 0, 3 ) === 'url',
+ elps = document.createElement( isImage ? 'img' : 'span' );
+
+ elps.className = pseudoHide + "-before " + pseudoHide + "-after";
+
+ Object.keys(elStyle).filter(indexedProperty).forEach(function(prop) {
+ // Prevent assigning of read only CSS Rules, ex. length, parentRule
+ try {
+ elps.style[prop] = elStyle[prop];
+ } catch (e) {
+ Util.log(['Tried to assign readonly property ', prop, 'Error:', e]);
+ }
+ });
+
+ if(isImage) {
+ elps.src = Util.parseBackgroundImage(content)[0].args[0];
+ } else {
+ elps.innerHTML = content;
+ }
+ return elps;
+ }
+
+ function indexedProperty(property) {
+ return (isNaN(window.parseInt(property, 10)));
+ }
+
+ function injectPseudoElements(el, stack) {
+ var before = getPseudoElement(el, ':before'),
+ after = getPseudoElement(el, ':after');
+ if(!before && !after) {
+ return;
+ }
+
+ if(before) {
+ el.className += " " + pseudoHide + "-before";
+ el.parentNode.insertBefore(before, el);
+ parseElement(before, stack, true);
+ el.parentNode.removeChild(before);
+ el.className = el.className.replace(pseudoHide + "-before", "").trim();
+ }
+
+ if (after) {
+ el.className += " " + pseudoHide + "-after";
+ el.appendChild(after);
+ parseElement(after, stack, true);
+ el.removeChild(after);
+ el.className = el.className.replace(pseudoHide + "-after", "").trim();
+ }
+
+ }
+
+ function renderBackgroundRepeat(ctx, image, backgroundPosition, bounds) {
+ var offsetX = Math.round(bounds.left + backgroundPosition.left),
+ offsetY = Math.round(bounds.top + backgroundPosition.top);
+
+ ctx.createPattern(image);
+ ctx.translate(offsetX, offsetY);
+ ctx.fill();
+ ctx.translate(-offsetX, -offsetY);
+ }
+
+ function backgroundRepeatShape(ctx, image, backgroundPosition, bounds, left, top, width, height) {
+ var args = [];
+ args.push(["line", Math.round(left), Math.round(top)]);
+ args.push(["line", Math.round(left + width), Math.round(top)]);
+ args.push(["line", Math.round(left + width), Math.round(height + top)]);
+ args.push(["line", Math.round(left), Math.round(height + top)]);
+ createShape(ctx, args);
+ ctx.save();
+ ctx.clip();
+ renderBackgroundRepeat(ctx, image, backgroundPosition, bounds);
+ ctx.restore();
+ }
+
+ function renderBackgroundColor(ctx, backgroundBounds, bgcolor) {
+ renderRect(
+ ctx,
+ backgroundBounds.left,
+ backgroundBounds.top,
+ backgroundBounds.width,
+ backgroundBounds.height,
+ bgcolor
+ );
+ }
+
+ function renderBackgroundRepeating(el, bounds, ctx, image, imageIndex) {
+ var backgroundSize = Util.BackgroundSize(el, bounds, image, imageIndex),
+ backgroundPosition = Util.BackgroundPosition(el, bounds, image, imageIndex, backgroundSize),
+ backgroundRepeat = getCSS(el, "backgroundRepeat").split(",").map(Util.trimText);
+
+ image = resizeImage(image, backgroundSize);
+
+ backgroundRepeat = backgroundRepeat[imageIndex] || backgroundRepeat[0];
+
+ switch (backgroundRepeat) {
+ case "repeat-x":
+ backgroundRepeatShape(ctx, image, backgroundPosition, bounds,
+ bounds.left, bounds.top + backgroundPosition.top, 99999, image.height);
+ break;
+
+ case "repeat-y":
+ backgroundRepeatShape(ctx, image, backgroundPosition, bounds,
+ bounds.left + backgroundPosition.left, bounds.top, image.width, 99999);
+ break;
+
+ case "no-repeat":
+ backgroundRepeatShape(ctx, image, backgroundPosition, bounds,
+ bounds.left + backgroundPosition.left, bounds.top + backgroundPosition.top, image.width, image.height);
+ break;
+
+ default:
+ renderBackgroundRepeat(ctx, image, backgroundPosition, {
+ top: bounds.top,
+ left: bounds.left,
+ width: image.width,
+ height: image.height
+ });
+ break;
+ }
+ }
+
+ function renderBackgroundImage(element, bounds, ctx) {
+ var backgroundImage = getCSS(element, "backgroundImage"),
+ backgroundImages = Util.parseBackgroundImage(backgroundImage),
+ image,
+ imageIndex = backgroundImages.length;
+
+ while(imageIndex--) {
+ backgroundImage = backgroundImages[imageIndex];
+
+ if (!backgroundImage.args || backgroundImage.args.length === 0) {
+ continue;
+ }
+
+ var key = backgroundImage.method === 'url' ?
+ backgroundImage.args[0] :
+ backgroundImage.value;
+
+ image = loadImage(key);
+
+ // TODO add support for background-origin
+ if (image) {
+ renderBackgroundRepeating(element, bounds, ctx, image, imageIndex);
+ } else {
+ Util.log("html2canvas: Error loading background:", backgroundImage);
+ }
+ }
+ }
+
+ function resizeImage(image, bounds) {
+ if(image.width === bounds.width && image.height === bounds.height) {
+ return image;
+ }
+
+ var ctx, canvas = doc.createElement('canvas');
+ canvas.width = bounds.width;
+ canvas.height = bounds.height;
+ ctx = canvas.getContext("2d");
+ drawImage(ctx, image, 0, 0, image.width, image.height, 0, 0, bounds.width, bounds.height );
+ return canvas;
+ }
+
+ function setOpacity(ctx, element, parentStack) {
+ return ctx.setVariable("globalAlpha", getCSS(element, "opacity") * ((parentStack) ? parentStack.opacity : 1));
+ }
+
+ function removePx(str) {
+ return str.replace("px", "");
+ }
+
+ var transformRegExp = /(matrix)\((.+)\)/;
+
+ function getTransform(element, parentStack) {
+ 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";
+
+ transformOrigin = transformOrigin.split(" ").map(removePx).map(Util.asFloat);
+
+ var matrix;
+ if (transform && transform !== "none") {
+ var match = transform.match(transformRegExp);
+ if (match) {
+ switch(match[1]) {
+ case "matrix":
+ matrix = match[2].split(",").map(Util.trimText).map(Util.asFloat);
+ break;
+ }
+ }
+ }
+
+ return {
+ origin: transformOrigin,
+ matrix: matrix
+ };
+ }
+
+ function createStack(element, parentStack, bounds, transform) {
+ var ctx = h2cRenderContext((!parentStack) ? documentWidth() : bounds.width , (!parentStack) ? documentHeight() : bounds.height),
+ stack = {
+ ctx: ctx,
+ opacity: setOpacity(ctx, element, parentStack),
+ cssPosition: getCSS(element, "position"),
+ borders: getBorderData(element),
+ transform: transform,
+ clip: (parentStack && parentStack.clip) ? Util.Extend( {}, parentStack.clip ) : null
+ };
+
+ setZ(element, stack, parentStack);
+
+ // TODO correct overflow for absolute content residing under a static position
+ if (options.useOverflow === true && /(hidden|scroll|auto)/.test(getCSS(element, "overflow")) === true && /(BODY)/i.test(element.nodeName) === false){
+ stack.clip = (stack.clip) ? clipBounds(stack.clip, bounds) : bounds;
+ }
+
+ return stack;
+ }
+
+ function getBackgroundBounds(borders, bounds, clip) {
+ var backgroundBounds = {
+ left: bounds.left + borders[3].width,
+ top: bounds.top + borders[0].width,
+ width: bounds.width - (borders[1].width + borders[3].width),
+ height: bounds.height - (borders[0].width + borders[2].width)
+ };
+
+ if (clip) {
+ backgroundBounds = clipBounds(backgroundBounds, clip);
+ }
+
+ return backgroundBounds;
+ }
+
+ function getBounds(element, transform) {
+ var bounds = (transform.matrix) ? Util.OffsetBounds(element) : Util.Bounds(element);
+ transform.origin[0] += bounds.left;
+ transform.origin[1] += bounds.top;
+ return bounds;
+ }
+
+ function renderElement(element, parentStack, pseudoElement, ignoreBackground) {
+ var transform = getTransform(element, parentStack),
+ bounds = getBounds(element, transform),
+ image,
+ stack = createStack(element, parentStack, bounds, transform),
+ borders = stack.borders,
+ ctx = stack.ctx,
+ backgroundBounds = getBackgroundBounds(borders, bounds, stack.clip),
+ borderData = parseBorders(element, bounds, borders),
+ backgroundColor = (ignoreElementsRegExp.test(element.nodeName)) ? "#efefef" : getCSS(element, "backgroundColor");
+
+
+ createShape(ctx, borderData.clip);
+
+ ctx.save();
+ ctx.clip();
+
+ if (backgroundBounds.height > 0 && backgroundBounds.width > 0 && !ignoreBackground) {
+ renderBackgroundColor(ctx, bounds, backgroundColor);
+ renderBackgroundImage(element, backgroundBounds, ctx);
+ } else if (ignoreBackground) {
+ stack.backgroundColor = backgroundColor;
+ }
+
+ ctx.restore();
+
+ borderData.borders.forEach(function(border) {
+ renderBorders(ctx, border.args, border.color);
+ });
+
+ if (!pseudoElement) {
+ injectPseudoElements(element, stack);
+ }
+
+ switch(element.nodeName){
+ case "IMG":
+ if ((image = loadImage(element.getAttribute('src')))) {
+ renderImage(ctx, element, image, bounds, borders);
+ } else {
+ Util.log("html2canvas: Error loading <img>:" + element.getAttribute('src'));
+ }
+ break;
+ case "INPUT":
+ // TODO add all relevant type's, i.e. HTML5 new stuff
+ // todo add support for placeholder attribute for browsers which support it
+ if (/^(text|url|email|submit|button|reset)$/.test(element.type) && (element.value || element.placeholder || "").length > 0){
+ renderFormValue(element, bounds, stack);
+ }
+ break;
+ case "TEXTAREA":
+ if ((element.value || element.placeholder || "").length > 0){
+ renderFormValue(element, bounds, stack);
+ }
+ break;
+ case "SELECT":
+ if ((element.options||element.placeholder || "").length > 0){
+ renderFormValue(element, bounds, stack);
+ }
+ break;
+ case "LI":
+ renderListItem(element, stack, backgroundBounds);
+ break;
+ case "CANVAS":
+ renderImage(ctx, element, element, bounds, borders);
+ break;
+ }
+
+ return stack;
+ }
+
+ function isElementVisible(element) {
+ return (getCSS(element, 'display') !== "none" && getCSS(element, 'visibility') !== "hidden" && !element.hasAttribute("data-html2canvas-ignore"));
+ }
+
+ function parseElement (element, stack, pseudoElement) {
+ if (isElementVisible(element)) {
+ stack = renderElement(element, stack, pseudoElement, false) || stack;
+ if (!ignoreElementsRegExp.test(element.nodeName)) {
+ parseChildren(element, stack, pseudoElement);
+ }
+ }
+ }
+
+ function parseChildren(element, stack, pseudoElement) {
+ Util.Children(element).forEach(function(node) {
+ if (node.nodeType === node.ELEMENT_NODE) {
+ parseElement(node, stack, pseudoElement);
+ } else if (node.nodeType === node.TEXT_NODE) {
+ renderText(element, node, stack);
+ }
+ });
+ }
+
+ 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 = {
+ numLoaded: 0, // also failed are counted here
+ numFailed: 0,
+ numTotal: 0,
+ cleanupDone: false
+ },
+ pageOrigin,
+ Util = _html2canvas.Util,
+ methods,
+ i,
+ count = 0,
+ element = options.elements[0] || document.body,
+ doc = element.ownerDocument,
+ domImages = element.getElementsByTagName('img'), // Fetch images of the present element only
+ imgLen = domImages.length,
+ link = doc.createElement("a"),
+ supportCORS = (function( img ){
+ return (img.crossOrigin !== undefined);
+ })(new Image()),
+ timeoutTimer;
+
+ link.href = window.location.href;
+ pageOrigin = link.protocol + link.host;
+
+ function isSameOrigin(url){
+ link.href = url;
+ link.href = link.href; // YES, BELIEVE IT OR NOT, that is required for IE9 - http://jsfiddle.net/niklasvh/2e48b/
+ var origin = link.protocol + link.host;
+ return (origin === pageOrigin);
+ }
+
+ function start(){
+ Util.log("html2canvas: start: images: " + images.numLoaded + " / " + images.numTotal + " (failed: " + images.numFailed + ")");
+ if (!images.firstRun && images.numLoaded >= images.numTotal){
+ Util.log("Finished loading images: # " + images.numTotal + " (failed: " + images.numFailed + ")");
+
+ if (typeof options.complete === "function"){
+ options.complete(images);
+ }
+
+ }
+ }
+
+ // TODO modify proxy to serve images with CORS enabled, where available
+ function proxyGetImage(url, img, imageObj){
+ var callback_name,
+ scriptUrl = options.proxy,
+ script;
+
+ link.href = url;
+ url = link.href; // work around for pages with base href="" set - WARNING: this may change the url
+
+ callback_name = 'html2canvas_' + (count++);
+ imageObj.callbackname = callback_name;
+
+ if (scriptUrl.indexOf("?") > -1) {
+ scriptUrl += "&";
+ } else {
+ scriptUrl += "?";
+ }
+ scriptUrl += 'url=' + encodeURIComponent(url) + '&callback=' + callback_name;
+ script = doc.createElement("script");
+
+ window[callback_name] = function(a){
+ if (a.substring(0,6) === "error:"){
+ imageObj.succeeded = false;
+ images.numLoaded++;
+ images.numFailed++;
+ start();
+ } else {
+ setImageLoadHandlers(img, imageObj);
+ img.src = a;
+ }
+ window[callback_name] = undefined; // to work with IE<9 // NOTE: that the undefined callback property-name still exists on the window object (for IE<9)
+ try {
+ delete window[callback_name]; // for all browser that support this
+ } catch(ex) {}
+ script.parentNode.removeChild(script);
+ script = null;
+ delete imageObj.script;
+ delete imageObj.callbackname;
+ };
+
+ script.setAttribute("type", "text/javascript");
+ script.setAttribute("src", scriptUrl);
+ imageObj.script = script;
+ window.document.body.appendChild(script);
+
+ }
+
+ function loadPseudoElement(element, type) {
+ var style = window.getComputedStyle(element, type),
+ content = style.content;
+ if (content.substr(0, 3) === 'url') {
+ methods.loadImage(_html2canvas.Util.parseBackgroundImage(content)[0].args[0]);
+ }
+ loadBackgroundImages(style.backgroundImage, element);
+ }
+
+ function loadPseudoElementImages(element) {
+ loadPseudoElement(element, ":before");
+ loadPseudoElement(element, ":after");
+ }
+
+ function loadGradientImage(backgroundImage, bounds) {
+ var img = _html2canvas.Generate.Gradient(backgroundImage, bounds);
+
+ if (img !== undefined){
+ images[backgroundImage] = {
+ img: img,
+ succeeded: true
+ };
+ images.numTotal++;
+ images.numLoaded++;
+ start();
+ }
+ }
+
+ function invalidBackgrounds(background_image) {
+ return (background_image && background_image.method && background_image.args && background_image.args.length > 0 );
+ }
+
+ function loadBackgroundImages(background_image, el) {
+ var bounds;
+
+ _html2canvas.Util.parseBackgroundImage(background_image).filter(invalidBackgrounds).forEach(function(background_image) {
+ if (background_image.method === 'url') {
+ methods.loadImage(background_image.args[0]);
+ } else if(background_image.method.match(/\-?gradient$/)) {
+ if(bounds === undefined) {
+ bounds = _html2canvas.Util.Bounds(el);
+ }
+ loadGradientImage(background_image.value, bounds);
+ }
+ });
+ }
+
+ function getImages (el) {
+ var elNodeType = false;
+
+ // Firefox fails with permission denied on pages with iframes
+ try {
+ Util.Children(el).forEach(getImages);
+ }
+ catch( e ) {}
+
+ try {
+ elNodeType = el.nodeType;
+ } catch (ex) {
+ elNodeType = false;
+ Util.log("html2canvas: failed to access some element's nodeType - Exception: " + ex.message);
+ }
+
+ if (elNodeType === 1 || elNodeType === undefined) {
+ loadPseudoElementImages(el);
+ try {
+ loadBackgroundImages(Util.getCSS(el, 'backgroundImage'), el);
+ } catch(e) {
+ Util.log("html2canvas: failed to get background-image - Exception: " + e.message);
+ }
+ loadBackgroundImages(el);
+ }
+ }
+
+ function setImageLoadHandlers(img, imageObj) {
+ img.onload = function() {
+ if ( imageObj.timer !== undefined ) {
+ // CORS succeeded
+ window.clearTimeout( imageObj.timer );
+ }
+
+ images.numLoaded++;
+ imageObj.succeeded = true;
+ img.onerror = img.onload = null;
+ start();
+ };
+ img.onerror = function() {
+ if (img.crossOrigin === "anonymous") {
+ // CORS failed
+ window.clearTimeout( imageObj.timer );
+
+ // let's try with proxy instead
+ if ( options.proxy ) {
+ var src = img.src;
+ img = new Image();
+ imageObj.img = img;
+ img.src = src;
+
+ proxyGetImage( img.src, img, imageObj );
+ return;
+ }
+ }
+
+ images.numLoaded++;
+ images.numFailed++;
+ imageObj.succeeded = false;
+ img.onerror = img.onload = null;
+ start();
+ };
+ }
+
+ methods = {
+ loadImage: function( src ) {
+ var img, imageObj;
+ if ( src && images[src] === undefined ) {
+ img = new Image();
+ if ( src.match(/data:image\/.*;base64,/i) ) {
+ img.src = src.replace(/url\(['"]{0,}|['"]{0,}\)$/ig, '');
+ imageObj = images[src] = {
+ img: img
+ };
+ images.numTotal++;
+ setImageLoadHandlers(img, imageObj);
+ } else if ( isSameOrigin( src ) || options.allowTaint === true ) {
+ imageObj = images[src] = {
+ img: img
+ };
+ images.numTotal++;
+ setImageLoadHandlers(img, imageObj);
+ img.src = src;
+ } else if ( supportCORS && !options.allowTaint && options.useCORS ) {
+ // attempt to load with CORS
+
+ img.crossOrigin = "anonymous";
+ imageObj = images[src] = {
+ img: img
+ };
+ images.numTotal++;
+ setImageLoadHandlers(img, imageObj);
+ img.src = src;
+ } else if ( options.proxy ) {
+ imageObj = images[src] = {
+ img: img
+ };
+ images.numTotal++;
+ proxyGetImage( src, img, imageObj );
+ }
+ }
+
+ },
+ cleanupDOM: function(cause) {
+ var img, src;
+ if (!images.cleanupDone) {
+ if (cause && typeof cause === "string") {
+ Util.log("html2canvas: Cleanup because: " + cause);
+ } else {
+ Util.log("html2canvas: Cleanup after timeout: " + options.timeout + " ms.");
+ }
+
+ for (src in images) {
+ if (images.hasOwnProperty(src)) {
+ img = images[src];
+ if (typeof img === "object" && img.callbackname && img.succeeded === undefined) {
+ // cancel proxy image request
+ window[img.callbackname] = undefined; // to work with IE<9 // NOTE: that the undefined callback property-name still exists on the window object (for IE<9)
+ try {
+ delete window[img.callbackname]; // for all browser that support this
+ } catch(ex) {}
+ if (img.script && img.script.parentNode) {
+ img.script.setAttribute("src", "about:blank"); // try to cancel running request
+ img.script.parentNode.removeChild(img.script);
+ }
+ images.numLoaded++;
+ images.numFailed++;
+ Util.log("html2canvas: Cleaned up failed img: '" + src + "' Steps: " + images.numLoaded + " / " + images.numTotal);
+ }
+ }
+ }
+
+ // cancel any pending requests
+ if(window.stop !== undefined) {
+ window.stop();
+ } else if(document.execCommand !== undefined) {
+ document.execCommand("Stop", false);
+ }
+ if (document.close !== undefined) {
+ document.close();
+ }
+ images.cleanupDone = true;
+ if (!(cause && typeof cause === "string")) {
+ start();
+ }
+ }
+ },
+
+ renderingDone: function() {
+ if (timeoutTimer) {
+ window.clearTimeout(timeoutTimer);
+ }
+ }
+ };
+
+ if (options.timeout > 0) {
+ timeoutTimer = window.setTimeout(methods.cleanupDOM, options.timeout);
+ }
+
+ Util.log('html2canvas: Preload starts: finding background-images');
+ images.firstRun = true;
+
+ getImages(element);
+
+ Util.log('html2canvas: Preload: Finding images');
+ // load <img> images
+ for (i = 0; i < imgLen; i+=1){
+ methods.loadImage( domImages[i].getAttribute( "src" ) );
+ }
+
+ images.firstRun = false;
+ Util.log('html2canvas: Preload: Done.');
+ if (images.numTotal === images.numLoaded) {
+ start();
+ }
+
+ return methods;
+};
+
+_html2canvas.Renderer = function(parseQueue, options){
+
+ // http://www.w3.org/TR/CSS21/zindex.html
+ function createRenderQueue(parseQueue) {
+ var queue = [],
+ rootContext;
+
+ rootContext = (function buildStackingContext(rootNode) {
+ var rootContext = {};
+ function insert(context, node, specialParent) {
+ var zi = (node.zIndex.zindex === 'auto') ? 0 : Number(node.zIndex.zindex),
+ contextForChildren = context, // the stacking context for children
+ isPositioned = node.zIndex.isPositioned,
+ isFloated = node.zIndex.isFloated,
+ stub = {node: node},
+ childrenDest = specialParent; // where children without z-index should be pushed into
+
+ if (node.zIndex.ownStacking) {
+ // '!' comes before numbers in sorted array
+ contextForChildren = stub.context = { '!': [{node:node, children: []}]};
+ childrenDest = undefined;
+ } else if (isPositioned || isFloated) {
+ childrenDest = stub.children = [];
+ }
+
+ if (zi === 0 && specialParent) {
+ specialParent.push(stub);
+ } else {
+ if (!context[zi]) { context[zi] = []; }
+ context[zi].push(stub);
+ }
+
+ node.zIndex.children.forEach(function(childNode) {
+ insert(contextForChildren, childNode, childrenDest);
+ });
+ }
+ insert(rootContext, rootNode);
+ return rootContext;
+ })(parseQueue);
+
+ function sortZ(context) {
+ Object.keys(context).sort().forEach(function(zi) {
+ var nonPositioned = [],
+ floated = [],
+ positioned = [],
+ list = [];
+
+ // positioned after static
+ context[zi].forEach(function(v) {
+ if (v.node.zIndex.isPositioned || v.node.zIndex.opacity < 1) {
+ // http://www.w3.org/TR/css3-color/#transparency
+ // non-positioned element with opactiy < 1 should be stacked as if it were a positioned element with ‘z-index: 0’ and ‘opacity: 1’.
+ positioned.push(v);
+ } else if (v.node.zIndex.isFloated) {
+ floated.push(v);
+ } else {
+ nonPositioned.push(v);
+ }
+ });
+
+ (function walk(arr) {
+ arr.forEach(function(v) {
+ list.push(v);
+ if (v.children) { walk(v.children); }
+ });
+ })(nonPositioned.concat(floated, positioned));
+
+ list.forEach(function(v) {
+ if (v.context) {
+ sortZ(v.context);
+ } else {
+ queue.push(v.node);
+ }
+ });
+ });
+ }
+
+ sortZ(rootContext);
+
+ return queue;
+ }
+
+ function getRenderer(rendererName) {
+ var renderer;
+
+ if (typeof options.renderer === "string" && _html2canvas.Renderer[rendererName] !== undefined) {
+ renderer = _html2canvas.Renderer[rendererName](options);
+ } else if (typeof rendererName === "function") {
+ renderer = rendererName(options);
+ } else {
+ throw new Error("Unknown renderer");
+ }
+
+ if ( typeof renderer !== "function" ) {
+ throw new Error("Invalid renderer defined");
+ }
+ return renderer;
+ }
+
+ return getRenderer(options.renderer)(parseQueue, options, document, createRenderQueue(parseQueue.stack), _html2canvas);
+};
+
+_html2canvas.Util.Support = function (options, doc) {
+
+ function supportSVGRendering() {
+ var img = new Image(),
+ canvas = doc.createElement("canvas"),
+ ctx = (canvas.getContext === undefined) ? false : canvas.getContext("2d");
+ if (ctx === false) {
+ return false;
+ }
+ canvas.width = canvas.height = 10;
+ img.src = [
+ "data:image/svg+xml,",
+ "<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10'>",
+ "<foreignObject width='10' height='10'>",
+ "<div xmlns='http://www.w3.org/1999/xhtml' style='width:10;height:10;'>",
+ "sup",
+ "</div>",
+ "</foreignObject>",
+ "</svg>"
+ ].join("");
+ try {
+ ctx.drawImage(img, 0, 0);
+ canvas.toDataURL();
+ } catch(e) {
+ return false;
+ }
+ _html2canvas.Util.log('html2canvas: Parse: SVG powered rendering available');
+ return true;
+ }
+
+ // Test whether we can use ranges to measure bounding boxes
+ // Opera doesn't provide valid bounds.height/bottom even though it supports the method.
+
+ function supportRangeBounds() {
+ var r, testElement, rangeBounds, rangeHeight, support = false;
+
+ if (doc.createRange) {
+ r = doc.createRange();
+ if (r.getBoundingClientRect) {
+ testElement = doc.createElement('boundtest');
+ testElement.style.height = "123px";
+ testElement.style.display = "block";
+ doc.body.appendChild(testElement);
+
+ r.selectNode(testElement);
+ rangeBounds = r.getBoundingClientRect();
+ rangeHeight = rangeBounds.height;
+
+ if (rangeHeight === 123) {
+ support = true;
+ }
+ doc.body.removeChild(testElement);
+ }
+ }
+
+ return support;
+ }
+
+ return {
+ rangeBounds: supportRangeBounds(),
+ svgRendering: options.svgRendering && supportSVGRendering()
+ };
+};
+window.html2canvas = function(elements, opts) {
+ elements = (elements.length) ? elements : [elements];
+ var queue,
+ canvas,
+ options = {
+ // general
+ logging: false,
+ elements: elements,
+ background: "#fff",
+
+ // preload options
+ proxy: null,
+ timeout: 0, // no timeout
+ useCORS: false, // try to load images as CORS (where available), before falling back to proxy
+ allowTaint: false, // whether to allow images to taint the canvas, won't need proxy if set to true
+
+ // parse options
+ svgRendering: false, // use svg powered rendering where available (FF11+)
+ ignoreElements: "IFRAME|OBJECT|PARAM",
+ useOverflow: true,
+ letterRendering: false,
+ chinese: false,
+
+ // render options
+
+ width: null,
+ height: null,
+ taintTest: true, // do a taint test with all images before applying to canvas
+ renderer: "Canvas"
+ };
+
+ options = _html2canvas.Util.Extend(opts, options);
+
+ _html2canvas.logging = options.logging;
+ options.complete = function( images ) {
+
+ if (typeof options.onpreloaded === "function") {
+ if ( options.onpreloaded( images ) === false ) {
+ return;
+ }
+ }
+ queue = _html2canvas.Parse( images, options );
+
+ if (typeof options.onparsed === "function") {
+ if ( options.onparsed( queue ) === false ) {
+ return;
+ }
+ }
+
+ 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
+ window.setTimeout( function(){
+ _html2canvas.Preload( options );
+ }, 0 );
+
+ return {
+ render: function( queue, opts ) {
+ return _html2canvas.Renderer( queue, _html2canvas.Util.Extend(opts, options) );
+ },
+ parse: function( images, opts ) {
+ return _html2canvas.Parse( images, _html2canvas.Util.Extend(opts, options) );
+ },
+ preload: function( opts ) {
+ return _html2canvas.Preload( _html2canvas.Util.Extend(opts, options) );
+ },
+ log: _html2canvas.Util.log
+ };
+};
+
+window.html2canvas.log = _html2canvas.Util.log; // for renderers
+window.html2canvas.Renderer = {
+ Canvas: undefined // We are assuming this will be used
+};
+_html2canvas.Renderer.Canvas = function(options) {
+ options = options || {};
+
+ var doc = document,
+ safeImages = [],
+ testCanvas = document.createElement("canvas"),
+ testctx = testCanvas.getContext("2d"),
+ Util = _html2canvas.Util,
+ canvas = options.canvas || doc.createElement('canvas');
+
+ function createShape(ctx, args) {
+ ctx.beginPath();
+ args.forEach(function(arg) {
+ ctx[arg.name].apply(ctx, arg['arguments']);
+ });
+ ctx.closePath();
+ }
+
+ function safeImage(item) {
+ if (safeImages.indexOf(item['arguments'][0].src ) === -1) {
+ testctx.drawImage(item['arguments'][0], 0, 0);
+ try {
+ testctx.getImageData(0, 0, 1, 1);
+ } catch(e) {
+ testCanvas = doc.createElement("canvas");
+ testctx = testCanvas.getContext("2d");
+ return false;
+ }
+ safeImages.push(item['arguments'][0].src);
+ }
+ return true;
+ }
+
+ function renderItem(ctx, item) {
+ switch(item.type){
+ case "variable":
+ ctx[item.name] = item['arguments'];
+ break;
+ case "function":
+ switch(item.name) {
+ case "createPattern":
+ if (item['arguments'][0].width > 0 && item['arguments'][0].height > 0) {
+ try {
+ ctx.fillStyle = ctx.createPattern(item['arguments'][0], "repeat");
+ }
+ catch(e) {
+ Util.log("html2canvas: Renderer: Error creating pattern", e.message);
+ }
+ }
+ break;
+ case "drawShape":
+ createShape(ctx, item['arguments']);
+ break;
+ case "drawImage":
+ if (item['arguments'][8] > 0 && item['arguments'][7] > 0) {
+ if (!options.taintTest || (options.taintTest && safeImage(item))) {
+ ctx.drawImage.apply( ctx, item['arguments'] );
+ }
+ }
+ break;
+ default:
+ ctx[item.name].apply(ctx, item['arguments']);
+ }
+ break;
+ }
+ }
+
+ return function(parsedData, options, document, queue, _html2canvas) {
+ var ctx = canvas.getContext("2d"),
+ newCanvas,
+ bounds,
+ fstyle,
+ zStack = parsedData.stack;
+
+ canvas.width = canvas.style.width = options.width || zStack.ctx.width;
+ canvas.height = canvas.style.height = options.height || zStack.ctx.height;
+
+ fstyle = ctx.fillStyle;
+ ctx.fillStyle = (Util.isTransparent(zStack.backgroundColor) && options.background !== undefined) ? options.background : parsedData.backgroundColor;
+ ctx.fillRect(0, 0, canvas.width, canvas.height);
+ ctx.fillStyle = fstyle;
+
+ queue.forEach(function(storageContext) {
+ // set common settings for canvas
+ ctx.textBaseline = "bottom";
+ ctx.save();
+
+ if (storageContext.transform.matrix) {
+ ctx.translate(storageContext.transform.origin[0], storageContext.transform.origin[1]);
+ ctx.transform.apply(ctx, storageContext.transform.matrix);
+ ctx.translate(-storageContext.transform.origin[0], -storageContext.transform.origin[1]);
+ }
+
+ if (storageContext.clip){
+ ctx.beginPath();
+ ctx.rect(storageContext.clip.left, storageContext.clip.top, storageContext.clip.width, storageContext.clip.height);
+ ctx.clip();
+ }
+
+ if (storageContext.ctx.storage) {
+ storageContext.ctx.storage.forEach(function(item) {
+ renderItem(ctx, item);
+ });
+ }
+
+ ctx.restore();
+ });
+
+ Util.log("html2canvas: Renderer: Canvas renderer done - returning canvas obj");
+
+ if (options.elements.length === 1) {
+ if (typeof options.elements[0] === "object" && options.elements[0].nodeName !== "BODY") {
+ // crop image to the bounds of selected (single) element
+ bounds = _html2canvas.Util.Bounds(options.elements[0]);
+ newCanvas = document.createElement('canvas');
+ newCanvas.width = Math.ceil(bounds.width);
+ newCanvas.height = Math.ceil(bounds.height);
+ ctx = newCanvas.getContext("2d");
+
+ ctx.drawImage(canvas, bounds.left, bounds.top, bounds.width, bounds.height, 0, 0, bounds.width, bounds.height);
+ canvas = null;
+ return newCanvas;
+ }
+ }
+
+ return canvas;
+ };
+};
+})(window,document);
\ No newline at end of file
git.ucc.asn.au / matches / MCTX3420.git / commitdiff
UCC git Repository :: git.ucc.asn.au