mirror of
https://github.com/niklasvh/html2canvas.git
synced 2023-08-10 21:13:10 +03:00
2250 lines
70 KiB
JavaScript
2250 lines
70 KiB
JavaScript
/*
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html2canvas v0.30 <http://html2canvas.hertzen.com>
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Copyright (c) 2011 Niklas von Hertzen. All rights reserved.
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http://www.twitter.com/niklasvh
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Released under MIT License
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*/
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/*
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The MIT License
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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var html2canvas = {};
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html2canvas.logging = true;
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html2canvas.log = function (a) {
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if (html2canvas.logging) {
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window.console.log(a);
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}
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};
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html2canvas.Util = {};
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html2canvas.Util.backgroundImage = function (src) {
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if (/data:image\/.*;base64,/i.test( src ) || /^(-webkit|-moz|linear-gradient|-o-)/.test( src )) {
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return src;
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}
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if (src.toLowerCase().substr( 0, 5 ) === 'url("') {
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src = src.substr( 5 );
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src = src.substr( 0, src.length - 2 );
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} else {
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src = src.substr( 4 );
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src = src.substr( 0, src.length - 1 );
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}
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return src;
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};
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html2canvas.Util.Bounds = function getBounds (el) {
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window.scroll(0,0);
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var clientRect,
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bounds = {};
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if (el.getBoundingClientRect){
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clientRect = el.getBoundingClientRect();
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// TODO add scroll position to bounds, so no scrolling of window necessary
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bounds.top = clientRect.top;
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bounds.bottom = clientRect.bottom || (clientRect.top + clientRect.height);
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bounds.left = clientRect.left;
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bounds.width = clientRect.width;
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bounds.height = clientRect.height;
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return bounds;
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} /*else{
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p = $(el).offset();
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return {
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left: p.left + getCSS(el,"borderLeftWidth", true),
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top: p.top + getCSS(el,"borderTopWidth", true),
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width:$(el).innerWidth(),
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height:$(el).innerHeight()
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};
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} */
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}
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html2canvas.Util.getCSS = function (el, attribute) {
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// return jQuery(el).css(attribute);
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/*
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var val,
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left,
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rsLeft = el.runtimeStyle && el.runtimeStyle[ attribute ],
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style = el.style;
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if ( el.currentStyle ) {
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val = el.currentStyle[ attribute ];
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} else if (window.getComputedStyle) {
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val = document.defaultView.getComputedStyle(el, null)[ attribute ];
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}
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*/
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// Check if we are not dealing with pixels, (Opera has issues with this)
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// Ported from jQuery css.js
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// From the awesome hack by Dean Edwards
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// http://erik.eae.net/archives/2007/07/27/18.54.15/#comment-102291
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// If we're not dealing with a regular pixel number
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// but a number that has a weird ending, we need to convert it to pixels
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// if ( !/^-?\d+(?:px)?$/i.test( val ) && /^-?\d/.test( val ) ) {
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/*
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// Remember the original values
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left = style.left;
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// Put in the new values to get a computed value out
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if ( rsLeft ) {
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el.runtimeStyle.left = el.currentStyle.left;
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}
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style.left = attribute === "fontSize" ? "1em" : (val || 0);
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val = style.pixelLeft + "px";
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// Revert the changed values
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style.left = left;
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if ( rsLeft ) {
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el.runtimeStyle.left = rsLeft;
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}*/
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val = $(el).css(attribute);
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// }
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return val;
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};
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html2canvas.Util.Extend = function (options, defaults) {
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var key;
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for (key in options) {
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if (options.hasOwnProperty(key)) {
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defaults[key] = options[key];
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}
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}
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return defaults;
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};
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html2canvas.Util.Children = function(el) {
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// $(el).contents() !== el.childNodes, Opera / IE have issues with that
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return $(el).contents();
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}
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html2canvas.Generate = {};
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html2canvas.Generate.Gradient = function(src, bounds) {
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var canvas = document.createElement('canvas'),
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ctx = canvas.getContext('2d'),
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tmp,
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p0 = 0,
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p1 = 0,
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p2 = 0,
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p3 = 0,
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steps = [],
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position,
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i,
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len,
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lingrad,
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increment,
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p,
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img;
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canvas.width = bounds.width;
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canvas.height = bounds.height;
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function getColors(input) {
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var j = -1,
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color = '',
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chr;
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while( j++ < input.length ) {
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chr = input.charAt( j );
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if (chr === ')') {
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color += chr;
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steps.push( color );
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color = '';
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j+=2;
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} else {
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color += chr;
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}
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}
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}
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if ( tmp = src.match(/-webkit-linear-gradient\((.*)\)/) ) {
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position = tmp[1].split( ",", 1 )[0];
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getColors( tmp[1].substr( position.length + 2 ) );
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position = position.split(' ');
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for (p = 0; p < position.length; p+=1) {
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switch(position[p]) {
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case 'top':
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p3 = bounds.height;
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break;
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case 'right':
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p0 = bounds.width;
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break;
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case 'bottom':
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p1 = bounds.height;
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break;
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case 'left':
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p2 = bounds.width;
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break;
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}
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}
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} else if (tmp = src.match(/-webkit-gradient\(linear, (\d+)[%]{0,1} (\d+)[%]{0,1}, (\d+)[%]{0,1} (\d+)[%]{0,1}, from\((.*)\), to\((.*)\)\)/)) {
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p0 = (tmp[1] * bounds.width) / 100;
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p1 = (tmp[2] * bounds.height) / 100;
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p2 = (tmp[3] * bounds.width) / 100;
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p3 = (tmp[4] * bounds.height) / 100;
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steps.push(tmp[5]);
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steps.push(tmp[6]);
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} else if (tmp = src.match(/-moz-linear-gradient\((\d+)[%]{0,1} (\d+)[%]{0,1}, (.*)\)/)) {
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p0 = (tmp[1] * bounds.width) / 100;
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p1 = (tmp[2] * bounds.width) / 100;
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p2 = bounds.width - p0;
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p3 = bounds.height - p1;
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getColors( tmp[3] );
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} else {
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return;
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}
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lingrad = ctx.createLinearGradient( p0, p1, p2, p3 );
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increment = 1 / (steps.length - 1);
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for (i = 0, len = steps.length; i < len; i+=1) {
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lingrad.addColorStop(increment * i, steps[i]);
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}
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ctx.fillStyle = lingrad;
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// draw shapes
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ctx.fillRect(0, 0, bounds.width,bounds.height);
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img = new Image();
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img.src = canvas.toDataURL();
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return img;
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}
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html2canvas.Generate.ListAlpha = function(number) {
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var tmp = "",
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modulus;
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do {
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modulus = number % 26;
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tmp = String.fromCharCode((modulus) + 64) + tmp;
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number = number / 26;
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}while((number*26) > 26);
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return tmp;
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}
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html2canvas.Generate.ListRoman = function(number) {
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var romanArray = ["M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"],
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decimal = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1],
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roman = "",
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v,
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len = romanArray.length;
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if (number <= 0 || number >= 4000) {
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return number;
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}
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for (v=0; v < len; v+=1) {
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while (number >= decimal[v]) {
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number -= decimal[v];
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roman += romanArray[v];
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}
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}
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return roman;
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}
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/*
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* New function for traversing elements
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*/
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html2canvas.Parse = function (element, images, opts) {
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opts = opts || {};
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// select body by default
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if (element === undefined) {
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element = document.body;
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}
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var support = {
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rangeBounds: false
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},
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options = {
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iframeDefault: "default",
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ignoreElements: "IFRAME|OBJECT|PARAM",
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useOverflow: true,
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letterRendering: false
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},
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needReorder = false,
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numDraws = 0,
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fontData = {},
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doc = element.ownerDocument,
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ignoreElementsRegExp = new RegExp("(" + options.ignoreElements + ")"),
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body = doc.body,
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r,
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testElement,
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rangeBounds,
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rangeHeight,
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stack,
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ctx,
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docDim,
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i,
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children,
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childrenLen;
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images = images || [];
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// Test whether we can use ranges to measure bounding boxes
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// Opera doesn't provide valid bounds.height/bottom even though it supports the method.
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if (doc.createRange) {
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r = doc.createRange();
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//this.support.rangeBounds = new Boolean(r.getBoundingClientRect);
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if (r.getBoundingClientRect){
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testElement = doc.createElement('boundtest');
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testElement.style.height = "123px";
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testElement.style.display = "block";
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body.appendChild(testElement);
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r.selectNode(testElement);
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rangeBounds = r.getBoundingClientRect();
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rangeHeight = rangeBounds.height;
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if (rangeHeight === 123) {
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support.rangeBounds = true;
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}
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body.removeChild(testElement);
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}
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}
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/*
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var rootStack = new this.storageContext($(document).width(),$(document).height());
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rootStack.opacity = this.getCSS(this.element,"opacity");
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var stack = this.newElement(this.element,rootStack);
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this.parseElement(this.element,stack);
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*/
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function docSize(){
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return {
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width: Math.max(
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Math.max(doc.body.scrollWidth, doc.documentElement.scrollWidth),
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Math.max(doc.body.offsetWidth, doc.documentElement.offsetWidth),
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Math.max(doc.body.clientWidth, doc.documentElement.clientWidth)
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),
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height: Math.max(
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Math.max(doc.body.scrollHeight, doc.documentElement.scrollHeight),
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Math.max(doc.body.offsetHeight, doc.documentElement.offsetHeight),
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Math.max(doc.body.clientHeight, doc.documentElement.clientHeight)
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)
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};
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}
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function getCSS (element, attribute, intOnly) {
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if (intOnly !== undefined && intOnly === true) {
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return parseInt(html2canvas.Util.getCSS(element, attribute), 10);
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}else{
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return html2canvas.Util.getCSS(element, attribute);
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}
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}
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// Drawing a rectangle
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function renderRect (ctx, x, y, w, h, bgcolor) {
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if (bgcolor !=="transparent"){
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ctx.setVariable("fillStyle", bgcolor);
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ctx.fillRect (x, y, w, h);
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numDraws+=1;
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}
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}
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function textTransform (text, transform) {
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switch(transform){
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case "lowercase":
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return text.toLowerCase();
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case "capitalize":
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return text.replace( /(^|\s|:|-|\(|\))([a-z])/g , function (m, p1, p2) {
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if (m.length > 0) {
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return p1 + p2.toUpperCase();
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}
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} );
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case "uppercase":
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return text.toUpperCase();
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default:
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return text;
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}
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}
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function trimText (text) {
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return text.replace(/^\s*/g, "").replace(/\s*$/g, "");
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}
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function fontMetrics (font, fontSize) {
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if (fontData[font + "-" + fontSize] !== undefined) {
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return fontData[font + "-" + fontSize];
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}
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var container = doc.createElement('div'),
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img = doc.createElement('img'),
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span = doc.createElement('span'),
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baseline,
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middle,
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metricsObj;
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container.style.visibility = "hidden";
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container.style.fontFamily = font;
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container.style.fontSize = fontSize;
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container.style.margin = 0;
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container.style.padding = 0;
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body.appendChild(container);
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// TODO add another image
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img.src = "http://html2canvas.hertzen.com/images/8.jpg";
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img.width = 1;
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img.height = 1;
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img.style.margin = 0;
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img.style.padding = 0;
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span.style.fontFamily = font;
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span.style.fontSize = fontSize;
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span.style.margin = 0;
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span.style.padding = 0;
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span.appendChild(doc.createTextNode('Hidden Text'));
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container.appendChild(span);
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container.appendChild(img);
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baseline = (img.offsetTop - span.offsetTop) + 1;
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container.removeChild(span);
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container.appendChild(doc.createTextNode('Hidden Text'));
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container.style.lineHeight = "normal";
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img.style.verticalAlign = "super";
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middle = (img.offsetTop-container.offsetTop) + 1;
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metricsObj = {
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baseline: baseline,
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lineWidth: 1,
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middle: middle
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};
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fontData[font + "-" + fontSize] = metricsObj;
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body.removeChild(container);
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return metricsObj;
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}
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function drawText(currentText, x, y, ctx){
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if (trimText(currentText).length>0) {
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ctx.fillText(currentText,x,y);
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numDraws+=1;
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}
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}
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function renderText(el, textNode, stack) {
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var ctx = stack.ctx,
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family = getCSS(el, "fontFamily", false),
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size = getCSS(el, "fontSize", false),
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color = getCSS(el, "color", false),
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text_decoration = getCSS(el, "textDecoration", false),
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text_align = getCSS(el, "textAlign", false),
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letter_spacing = getCSS(el, "letterSpacing", false),
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bounds,
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text,
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metrics,
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renderList,
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bold = getCSS(el, "fontWeight", false),
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font_style = getCSS(el, "fontStyle", false),
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font_variant = getCSS(el, "fontVariant", false),
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align = false,
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newTextNode,
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textValue,
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textOffset = 0,
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oldTextNode,
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c,
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range,
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parent,
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wrapElement,
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backupText;
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// apply text-transform:ation to the text
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textNode.nodeValue = textTransform(textNode.nodeValue, getCSS(el, "textTransform", false));
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text = trimText(textNode.nodeValue);
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if (text.length>0){
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if (text_decoration !== "none"){
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metrics = fontMetrics(family, size);
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}
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text_align = text_align.replace(["-webkit-auto"],["auto"]);
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if (options.letterRendering === false && /^(left|right|justify|auto)$/.test(text_align) && /^(normal|none)$/.test(letter_spacing)){
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// this.setContextVariable(ctx,"textAlign",text_align);
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renderList = textNode.nodeValue.split(/(\b| )/);
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}else{
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// this.setContextVariable(ctx,"textAlign","left");
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renderList = textNode.nodeValue.split("");
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}
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switch(parseInt(bold, 10)){
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case 401:
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bold = "bold";
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break;
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case 400:
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bold = "normal";
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break;
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}
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ctx.setVariable("fillStyle", color);
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ctx.setVariable("font", font_variant + " " + bold + " " + font_style + " " + size + " " + family);
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if (align){
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ctx.setVariable("textAlign", "right");
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}else{
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ctx.setVariable("textAlign", "left");
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}
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|
|
/*
|
|
if (stack.clip){
|
|
ctx.rect (stack.clip.left, stack.clip.top, stack.clip.width, stack.clip.height);
|
|
ctx.clip();
|
|
}
|
|
*/
|
|
|
|
|
|
oldTextNode = textNode;
|
|
|
|
|
|
for (c=0; c < renderList.length; c+=1) {
|
|
textValue = null;
|
|
|
|
|
|
|
|
if (support.rangeBounds){
|
|
// getBoundingClientRect is supported for ranges
|
|
if (text_decoration !== "none" || trimText(renderList[c]).length !== 0) {
|
|
textValue = renderList[c];
|
|
if (doc.createRange){
|
|
range = doc.createRange();
|
|
|
|
range.setStart(textNode, textOffset);
|
|
range.setEnd(textNode, textOffset + textValue.length);
|
|
}else{
|
|
// TODO add IE support
|
|
range = body.createTextRange();
|
|
}
|
|
|
|
if (range.getBoundingClientRect()) {
|
|
bounds = range.getBoundingClientRect();
|
|
}else{
|
|
bounds = {};
|
|
}
|
|
|
|
}
|
|
}else{
|
|
// it isn't supported, so let's wrap it inside an element instead and get the bounds there
|
|
|
|
// IE 9 bug
|
|
if (typeof oldTextNode.nodeValue !== "string" ){
|
|
continue;
|
|
}
|
|
|
|
newTextNode = oldTextNode.splitText(renderList[c].length);
|
|
|
|
parent = oldTextNode.parentNode;
|
|
wrapElement = doc.createElement('wrapper');
|
|
backupText = oldTextNode.cloneNode(true);
|
|
|
|
wrapElement.appendChild(oldTextNode.cloneNode(true));
|
|
parent.replaceChild(wrapElement, oldTextNode);
|
|
|
|
bounds = html2canvas.Util.Bounds(wrapElement);
|
|
|
|
textValue = oldTextNode.nodeValue;
|
|
|
|
oldTextNode = newTextNode;
|
|
parent.replaceChild(backupText, wrapElement);
|
|
|
|
|
|
}
|
|
|
|
if (textValue !== null){
|
|
drawText(textValue, bounds.left, bounds.bottom, ctx);
|
|
}
|
|
|
|
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, 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;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
textOffset += renderList[c].length;
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
}
|
|
|
|
function listPosition (element, val) {
|
|
var boundElement = doc.createElement( "boundelement" ),
|
|
type,
|
|
bounds;
|
|
|
|
boundElement.style.display = "inline";
|
|
//boundElement.style.width = "1px";
|
|
//boundElement.style.height = "1px";
|
|
|
|
type = element.style.listStyleType;
|
|
element.style.listStyleType = "none";
|
|
|
|
boundElement.appendChild( doc.createTextNode( val ) );
|
|
|
|
|
|
element.insertBefore(boundElement, element.firstChild);
|
|
|
|
|
|
bounds = html2canvas.Util.Bounds( boundElement );
|
|
element.removeChild( boundElement );
|
|
element.style.listStyleType = type;
|
|
return bounds;
|
|
|
|
}
|
|
|
|
|
|
function renderListItem(element, stack, elBounds) {
|
|
|
|
|
|
var position = getCSS(element, "listStylePosition", false),
|
|
x,
|
|
y,
|
|
type = getCSS(element, "listStyleType", false),
|
|
currentIndex,
|
|
text,
|
|
listBounds,
|
|
bold = getCSS(element, "fontWeight");
|
|
|
|
if (/^(decimal|decimal-leading-zero|upper-alpha|upper-latin|upper-roman|lower-alpha|lower-greek|lower-latin|lower-roman)$/i.test(type)) {
|
|
|
|
// TODO remove jQuery dependency
|
|
currentIndex = $(element).index()+1;
|
|
|
|
switch(type){
|
|
case "decimal":
|
|
text = currentIndex;
|
|
break;
|
|
case "decimal-leading-zero":
|
|
if (currentIndex.toString().length === 1){
|
|
text = currentIndex = "0" + currentIndex.toString();
|
|
}else{
|
|
text = 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;
|
|
}
|
|
|
|
|
|
text += ". ";
|
|
listBounds = listPosition(element, text);
|
|
|
|
|
|
|
|
switch(bold){
|
|
case 401:
|
|
bold = "bold";
|
|
break;
|
|
case 400:
|
|
bold = "normal";
|
|
break;
|
|
}
|
|
|
|
|
|
|
|
|
|
ctx.setVariable( "fillStyle", getCSS(element, "color", false) );
|
|
ctx.setVariable( "font", getCSS(element, "fontVariant", false) + " " + bold + " " + getCSS(element, "fontStyle", false) + " " + getCSS(element, "fontFize", false) + " " + getCSS(element, "fontFamily", false) );
|
|
|
|
|
|
if ( position === "inside" ) {
|
|
ctx.setVariable("textAlign", "left");
|
|
// this.setFont(stack.ctx, element, false);
|
|
x = elBounds.left;
|
|
|
|
}else{
|
|
return;
|
|
/*
|
|
TODO really need to figure out some more accurate way to try and find the position.
|
|
as defined in http://www.w3.org/TR/CSS21/generate.html#propdef-list-style-position, it does not even have a specified "correct" position, so each browser
|
|
may display it whatever way it feels like.
|
|
"The position of the list-item marker adjacent to floats is undefined in CSS 2.1. CSS 2.1 does not specify the precise location of the marker box or its position in the painting order"
|
|
*/
|
|
ctx.setVariable("textAlign", "right");
|
|
// this.setFont(stack.ctx, element, true);
|
|
x = elBounds.left - 10;
|
|
}
|
|
|
|
y = listBounds.bottom;
|
|
|
|
drawText(text, x, y, ctx)
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
function loadImage (src){
|
|
|
|
var imgIndex = -1,
|
|
i,
|
|
imgLen;
|
|
if (images.indexOf){
|
|
imgIndex = images.indexOf(src);
|
|
}else{
|
|
for(i = 0, imgLen = images.length; i < imgLen.length; i+=1){
|
|
if(images[i] === src) {
|
|
imgIndex = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (imgIndex > -1){
|
|
return images[imgIndex+1];
|
|
}else{
|
|
return 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(zIndex, parentZ){
|
|
// TODO fix static elements overlapping relative/absolute elements under same stack, if they are defined after them
|
|
|
|
if (!parentZ){
|
|
this.zStack = new html2canvas.zContext(0);
|
|
return this.zStack;
|
|
}
|
|
|
|
if (zIndex !== "auto"){
|
|
needReorder = true;
|
|
var newContext = new html2canvas.zContext(zIndex);
|
|
parentZ.children.push(newContext);
|
|
return newContext;
|
|
|
|
}
|
|
|
|
return parentZ;
|
|
|
|
}
|
|
|
|
function renderBorders(el, ctx, bounds, clip){
|
|
|
|
/*
|
|
* TODO add support for different border-style's than solid
|
|
*/
|
|
|
|
var x = bounds.left,
|
|
y = bounds.top,
|
|
w = bounds.width,
|
|
h = bounds.height,
|
|
borderSide,
|
|
borderData,
|
|
bx,
|
|
by,
|
|
bw,
|
|
bh,
|
|
borderBounds,
|
|
borders = (function(el){
|
|
var borders = [],
|
|
sides = ["Top","Right","Bottom","Left"],
|
|
s;
|
|
|
|
for (s = 0; s < 4; s+=1){
|
|
borders.push({
|
|
width: getCSS(el, 'border' + sides[s] + 'Width', true),
|
|
color: getCSS(el, 'border' + sides[s] + 'Color', false)
|
|
});
|
|
}
|
|
|
|
return borders;
|
|
|
|
}(el));
|
|
|
|
|
|
for (borderSide = 0; borderSide < 4; borderSide+=1){
|
|
borderData = borders[borderSide];
|
|
|
|
if (borderData.width>0){
|
|
bx = x;
|
|
by = y;
|
|
bw = w;
|
|
bh = h - (borders[2].width);
|
|
|
|
switch(borderSide){
|
|
case 0:
|
|
// top border
|
|
bh = borders[0].width;
|
|
break;
|
|
case 1:
|
|
// right border
|
|
bx = x + w - (borders[1].width);
|
|
bw = borders[1].width;
|
|
break;
|
|
case 2:
|
|
// bottom border
|
|
by = (by + h) - (borders[2].width);
|
|
bh = borders[2].width;
|
|
break;
|
|
case 3:
|
|
// left border
|
|
bw = borders[3].width;
|
|
break;
|
|
}
|
|
|
|
borderBounds = {
|
|
left:bx,
|
|
top:by,
|
|
width: bw,
|
|
height:bh
|
|
};
|
|
|
|
if (clip){
|
|
borderBounds = clipBounds(borderBounds, clip);
|
|
}
|
|
|
|
|
|
if (borderBounds.width>0 && borderBounds.height>0){
|
|
renderRect(ctx, bx, by, borderBounds.width, borderBounds.height, borderData.color);
|
|
}
|
|
|
|
|
|
}
|
|
}
|
|
|
|
return borders;
|
|
|
|
}
|
|
|
|
|
|
function renderFormValue (el, bounds, stack){
|
|
|
|
var valueWrap = doc.createElement('valuewrap'),
|
|
cssArr = ['lineHeight','textAlign','fontFamily','color','fontSize','paddingLeft','paddingTop','width','height','border','borderLeftWidth','borderTopWidth'],
|
|
i,
|
|
textValue,
|
|
textNode,
|
|
arrLen,
|
|
style;
|
|
|
|
for (i = 0, arrLen = cssArr.length; i < arrLen; i+=1){
|
|
style = cssArr[i];
|
|
valueWrap.style[style] = getCSS(el, style, false);
|
|
}
|
|
|
|
|
|
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", false);
|
|
}
|
|
|
|
|
|
valueWrap.style.top = bounds.top + "px";
|
|
valueWrap.style.left = bounds.left + "px";
|
|
|
|
if (el.nodeName === "SELECT"){
|
|
// TODO increase accuracy of text position
|
|
textValue = el.options[el.selectedIndex].text;
|
|
} else{
|
|
textValue = el.value;
|
|
}
|
|
textNode = doc.createTextNode(textValue);
|
|
|
|
valueWrap.appendChild(textNode);
|
|
body.appendChild(valueWrap);
|
|
|
|
|
|
renderText(el, textNode, stack);
|
|
body.removeChild(valueWrap);
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
function getBackgroundPosition(el, bounds, image){
|
|
// TODO add support for multi image backgrounds
|
|
|
|
var bgpos = getCSS(el, "backgroundPosition").split(",")[0] || "0 0",
|
|
bgposition = bgpos.split(" "),
|
|
topPos,
|
|
left,
|
|
percentage,
|
|
val;
|
|
|
|
if (bgposition.length === 1){
|
|
val = bgposition;
|
|
|
|
bgposition = [];
|
|
|
|
bgposition[0] = val;
|
|
bgposition[1] = val;
|
|
}
|
|
|
|
|
|
|
|
if (bgposition[0].toString().indexOf("%") !== -1){
|
|
percentage = (parseFloat(bgposition[0])/100);
|
|
left = ((bounds.width * percentage)-(image.width*percentage));
|
|
|
|
}else{
|
|
left = parseInt(bgposition[0],10);
|
|
}
|
|
|
|
if (bgposition[1].toString().indexOf("%") !== -1){
|
|
|
|
percentage = (parseFloat(bgposition[1])/100);
|
|
topPos = ((bounds.height * percentage)-(image.height*percentage));
|
|
}else{
|
|
topPos = parseInt(bgposition[1],10);
|
|
}
|
|
|
|
|
|
|
|
|
|
return {
|
|
top: topPos,
|
|
left: left
|
|
};
|
|
|
|
}
|
|
|
|
function renderImage (ctx, image, sx, sy, sw, sh, dx, dy, dw, dh) {
|
|
ctx.drawImage(
|
|
image,
|
|
sx, //sx
|
|
sy, //sy
|
|
sw, //sw
|
|
sh, //sh
|
|
dx, //dx
|
|
dy, // dy
|
|
dw, //dw
|
|
dh //dh
|
|
);
|
|
numDraws+=1;
|
|
|
|
}
|
|
|
|
|
|
function renderBackgroundRepeat (ctx, image, x, y, width, height, elx, ely){
|
|
var sourceX = 0,
|
|
sourceY=0;
|
|
if (elx-x>0){
|
|
sourceX = elx-x;
|
|
}
|
|
|
|
if (ely-y>0){
|
|
sourceY = ely-y;
|
|
}
|
|
|
|
renderImage(
|
|
ctx,
|
|
image,
|
|
sourceX, // source X
|
|
sourceY, // source Y
|
|
width-sourceX, // source Width
|
|
height-sourceY, // source Height
|
|
x+sourceX, // destination X
|
|
y+sourceY, // destination Y
|
|
width-sourceX, // destination width
|
|
height-sourceY // destination height
|
|
);
|
|
}
|
|
|
|
|
|
function renderBackgroundRepeatY (ctx, image, bgp, x, y, w, h){
|
|
|
|
var height,
|
|
width = Math.min(image.width,w),bgy;
|
|
|
|
bgp.top = bgp.top-Math.ceil(bgp.top/image.height)*image.height;
|
|
|
|
|
|
for(bgy=(y+bgp.top);bgy<h+y;){
|
|
|
|
|
|
if ( Math.floor(bgy+image.height)>h+y){
|
|
height = (h+y)-bgy;
|
|
}else{
|
|
height = image.height;
|
|
}
|
|
renderBackgroundRepeat(ctx,image,x+bgp.left,bgy,width,height,x,y);
|
|
|
|
bgy = Math.floor(bgy+image.height);
|
|
|
|
}
|
|
}
|
|
|
|
function renderBackgroundRepeatX(ctx, image, bgp, x, y, w, h){
|
|
|
|
var height = Math.min(image.height,h),
|
|
width,bgx;
|
|
|
|
|
|
bgp.left = bgp.left-Math.ceil(bgp.left/image.width)*image.width;
|
|
|
|
|
|
for (bgx=(x+bgp.left);bgx<w+x;) {
|
|
|
|
if (Math.floor(bgx+image.width)>w+x){
|
|
width = (w+x)-bgx;
|
|
}else{
|
|
width = image.width;
|
|
}
|
|
|
|
renderBackgroundRepeat(ctx,image,bgx,(y+bgp.top),width,height,x,y);
|
|
|
|
bgx = Math.floor(bgx+image.width);
|
|
|
|
|
|
}
|
|
}
|
|
|
|
function renderBackground(el,bounds,ctx){
|
|
|
|
// TODO add support for multi background-images
|
|
var background_image = getCSS(el, "backgroundImage", false),
|
|
background_repeat = getCSS(el, "backgroundRepeat", false).split(",")[0],
|
|
image,
|
|
bgp,
|
|
bgy,
|
|
bgw,
|
|
bgsx,
|
|
bgsy,
|
|
bgdx,
|
|
bgdy,
|
|
bgh,
|
|
h,
|
|
height,
|
|
add;
|
|
|
|
// if (typeof background_image !== "undefined" && /^(1|none)$/.test(background_image) === false && /^(-webkit|-moz|linear-gradient|-o-)/.test(background_image)===false){
|
|
|
|
if ( !/data:image\/.*;base64,/i.test(background_image) && !/^(-webkit|-moz|linear-gradient|-o-)/.test(background_image) ) {
|
|
background_image = background_image.split(",")[0];
|
|
}
|
|
|
|
if ( typeof background_image !== "undefined" && /^(1|none)$/.test( background_image ) === false ) {
|
|
background_image = html2canvas.Util.backgroundImage( background_image );
|
|
image = loadImage( background_image );
|
|
|
|
|
|
bgp = getBackgroundPosition(el, bounds, image);
|
|
|
|
|
|
if ( image ){
|
|
switch ( background_repeat ) {
|
|
|
|
case "repeat-x":
|
|
renderBackgroundRepeatX( ctx, image, bgp, bounds.left, bounds.top, bounds.width, bounds.height );
|
|
break;
|
|
|
|
case "repeat-y":
|
|
renderBackgroundRepeatY( ctx, image, bgp, bounds.left, bounds.top, bounds.width, bounds.height );
|
|
break;
|
|
|
|
case "no-repeat":
|
|
/*
|
|
this.drawBackgroundRepeat(
|
|
ctx,
|
|
image,
|
|
bgp.left+bounds.left, // sx
|
|
bgp.top+bounds.top, // sy
|
|
Math.min(bounds.width,image.width),
|
|
Math.min(bounds.height,image.height),
|
|
bounds.left,
|
|
bounds.top
|
|
);*/
|
|
|
|
|
|
// console.log($(el).css('background-image'));
|
|
bgw = bounds.width - bgp.left;
|
|
bgh = bounds.height - bgp.top;
|
|
bgsx = bgp.left;
|
|
bgsy = bgp.top;
|
|
bgdx = bgp.left+bounds.left;
|
|
bgdy = bgp.top+bounds.top;
|
|
|
|
//
|
|
// bgw = Math.min(bgw,image.width);
|
|
// bgh = Math.min(bgh,image.height);
|
|
|
|
if (bgsx<0){
|
|
bgsx = Math.abs(bgsx);
|
|
bgdx += bgsx;
|
|
bgw = Math.min(bounds.width,image.width-bgsx);
|
|
}else{
|
|
bgw = Math.min(bgw,image.width);
|
|
bgsx = 0;
|
|
}
|
|
|
|
if (bgsy<0){
|
|
bgsy = Math.abs(bgsy);
|
|
bgdy += bgsy;
|
|
// bgh = bgh-bgsy;
|
|
bgh = Math.min(bounds.height,image.height-bgsy);
|
|
}else{
|
|
bgh = Math.min(bgh,image.height);
|
|
bgsy = 0;
|
|
}
|
|
|
|
|
|
// bgh = Math.abs(bgh);
|
|
// bgw = Math.abs(bgw);
|
|
if (bgh>0 && bgw > 0){
|
|
renderImage(
|
|
ctx,
|
|
image,
|
|
bgsx, // source X : 0
|
|
bgsy, // source Y : 1695
|
|
bgw, // source Width : 18
|
|
bgh, // source Height : 1677
|
|
bgdx, // destination X :906
|
|
bgdy, // destination Y : 1020
|
|
bgw, // destination width : 18
|
|
bgh // destination height : 1677
|
|
);
|
|
|
|
// ctx.drawImage(image,(bounds.left+bgp.left),(bounds.top+bgp.top));
|
|
|
|
}
|
|
break;
|
|
default:
|
|
|
|
|
|
|
|
bgp.top = bgp.top-Math.ceil(bgp.top/image.height)*image.height;
|
|
|
|
|
|
for(bgy=(bounds.top+bgp.top);bgy<bounds.height+bounds.top;){
|
|
|
|
|
|
|
|
h = Math.min(image.height,(bounds.height+bounds.top)-bgy);
|
|
|
|
|
|
if ( Math.floor(bgy+image.height)>h+bgy){
|
|
height = (h+bgy)-bgy;
|
|
}else{
|
|
height = image.height;
|
|
}
|
|
// console.log(height);
|
|
|
|
if (bgy<bounds.top){
|
|
add = bounds.top-bgy;
|
|
bgy = bounds.top;
|
|
|
|
}else{
|
|
add = 0;
|
|
}
|
|
|
|
renderBackgroundRepeatX(ctx,image,bgp,bounds.left,bgy,bounds.width,height);
|
|
if (add>0){
|
|
bgp.top += add;
|
|
}
|
|
bgy = Math.floor(bgy+image.height)-add;
|
|
}
|
|
break;
|
|
|
|
|
|
}
|
|
}else{
|
|
|
|
html2canvas.log("Error loading background:" + background_image);
|
|
//console.log(images);
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
|
|
|
|
function renderElement(el, parentStack){
|
|
|
|
var bounds = html2canvas.Util.Bounds(el),
|
|
x = bounds.left,
|
|
y = bounds.top,
|
|
w = bounds.width,
|
|
h = bounds.height,
|
|
image,
|
|
bgcolor = getCSS(el, "backgroundColor", false),
|
|
cssPosition = getCSS(el, "position", false),
|
|
zindex,
|
|
opacity = getCSS(el, "opacity", false),
|
|
stack,
|
|
stackLength,
|
|
borders,
|
|
ctx,
|
|
bgbounds,
|
|
imgSrc,
|
|
paddingLeft,
|
|
paddingTop,
|
|
paddingRight,
|
|
paddingBottom;
|
|
|
|
if (parentStack === undefined){
|
|
docDim = docSize();
|
|
parentStack = {
|
|
opacity: 1
|
|
};
|
|
}else{
|
|
docDim = {};
|
|
}
|
|
|
|
|
|
//var zindex = this.formatZ(this.getCSS(el,"zIndex"),cssPosition,parentStack.zIndex,el.parentNode);
|
|
|
|
zindex = setZ( getCSS( el, "zIndex", false ), parentStack.zIndex );
|
|
|
|
|
|
|
|
stack = {
|
|
ctx: new html2canvas.canvasContext( docDim.width || w , docDim.height || h ),
|
|
zIndex: zindex,
|
|
opacity: opacity * parentStack.opacity,
|
|
cssPosition: cssPosition
|
|
};
|
|
|
|
|
|
|
|
// TODO correct overflow for absolute content residing under a static position
|
|
|
|
if (parentStack.clip){
|
|
stack.clip = html2canvas.Util.Extend( {}, parentStack.clip );
|
|
//stack.clip = parentStack.clip;
|
|
// stack.clip.height = stack.clip.height - parentStack.borders[2].width;
|
|
}
|
|
|
|
|
|
if ( options.useOverflow === true && /(hidden|scroll|auto)/.test(getCSS(el, "overflow")) === true && /(BODY)/i.test(el.nodeName) === false ){
|
|
if (stack.clip){
|
|
stack.clip = clipBounds(stack.clip, bounds);
|
|
}else{
|
|
stack.clip = bounds;
|
|
}
|
|
}
|
|
|
|
|
|
stackLength = zindex.children.push(stack);
|
|
|
|
ctx = zindex.children[stackLength-1].ctx;
|
|
|
|
ctx.setVariable("globalAlpha", stack.opacity);
|
|
|
|
// draw element borders
|
|
borders = renderBorders(el, ctx, bounds);
|
|
stack.borders = borders;
|
|
|
|
|
|
// let's modify clip area for child elements, so borders dont get overwritten
|
|
|
|
/*
|
|
if (stack.clip){
|
|
stack.clip.width = stack.clip.width-(borders[1].width);
|
|
stack.clip.height = stack.clip.height-(borders[2].width);
|
|
}
|
|
*/
|
|
if (ignoreElementsRegExp.test(el.nodeName) && options.iframeDefault !== "transparent"){
|
|
if (options.iframeDefault === "default"){
|
|
bgcolor = "#efefef";
|
|
}else{
|
|
bgcolor = options.iframeDefault;
|
|
}
|
|
}
|
|
|
|
// draw base element bgcolor
|
|
|
|
bgbounds = {
|
|
left: x + borders[3].width,
|
|
top: y + borders[0].width,
|
|
width: w - (borders[1].width + borders[3].width),
|
|
height: h - (borders[0].width + borders[2].width)
|
|
};
|
|
|
|
//if (this.withinBounds(stack.clip,bgbounds)){
|
|
|
|
if (stack.clip){
|
|
bgbounds = clipBounds(bgbounds, stack.clip);
|
|
|
|
//}
|
|
|
|
}
|
|
|
|
|
|
if (bgbounds.height > 0 && bgbounds.width > 0){
|
|
renderRect(
|
|
ctx,
|
|
bgbounds.left,
|
|
bgbounds.top,
|
|
bgbounds.width,
|
|
bgbounds.height,
|
|
bgcolor
|
|
);
|
|
|
|
renderBackground(el, bgbounds, ctx);
|
|
}
|
|
|
|
switch(el.nodeName){
|
|
case "IMG":
|
|
imgSrc = el.getAttribute('src');
|
|
image = loadImage(imgSrc);
|
|
if (image){
|
|
|
|
paddingLeft = getCSS(el, 'paddingLeft', true);
|
|
paddingTop = getCSS(el, 'paddingTop', true);
|
|
paddingRight = getCSS(el, 'paddingRight', true);
|
|
paddingBottom = getCSS(el, 'paddingBottom', true);
|
|
|
|
|
|
renderImage(
|
|
ctx,
|
|
image,
|
|
0, //sx
|
|
0, //sy
|
|
image.width, //sw
|
|
image.height, //sh
|
|
x + paddingLeft + borders[3].width, //dx
|
|
y + 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
|
|
);
|
|
|
|
}else {
|
|
html2canvas.log("Error loading <img>:" + imgSrc);
|
|
}
|
|
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(el.type) && el.value.length > 0){
|
|
|
|
renderFormValue(el, bounds, stack);
|
|
|
|
|
|
/*
|
|
this just doesn't work well enough
|
|
|
|
this.newText(el,{
|
|
nodeValue:el.value,
|
|
splitText: function(){
|
|
return this;
|
|
},
|
|
formValue:true
|
|
},stack);
|
|
*/
|
|
}
|
|
break;
|
|
case "TEXTAREA":
|
|
if (el.value.length > 0){
|
|
renderFormValue(el, bounds, stack);
|
|
}
|
|
break;
|
|
case "SELECT":
|
|
if (el.options.length > 0){
|
|
renderFormValue(el, bounds, stack);
|
|
}
|
|
break;
|
|
case "LI":
|
|
renderListItem(el, stack, bgbounds);
|
|
break;
|
|
}
|
|
|
|
return zindex.children[stackLength - 1];
|
|
}
|
|
|
|
|
|
|
|
function parseElement (el, stack) {
|
|
|
|
// skip hidden elements and their children
|
|
if (getCSS(el, 'display') !== "none" && getCSS(el, 'visibility') !== "hidden") {
|
|
|
|
stack = renderElement(el, stack) || stack;
|
|
|
|
ctx = stack.ctx;
|
|
|
|
if ( !ignoreElementsRegExp.test( el.nodeName ) ) {
|
|
var elementChildren = html2canvas.Util.Children( el ),
|
|
i,
|
|
node,
|
|
childrenLen;
|
|
for (i = 0, childrenLen = elementChildren.length; i < childrenLen; i+=1) {
|
|
node = elementChildren[i];
|
|
|
|
if ( node.nodeType === 1 ) {
|
|
parseElement(node, stack);
|
|
}else if ( node.nodeType === 3 ) {
|
|
renderText(el, node, stack);
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
stack = renderElement(element);
|
|
|
|
// parse every child element
|
|
for (i = 0, children = element.children, childrenLen = children.length; i < childrenLen; i+=1){
|
|
parseElement(children[i], stack);
|
|
}
|
|
|
|
return stack;
|
|
|
|
};
|
|
|
|
html2canvas.zContext = function(zindex) {
|
|
return {
|
|
zindex: zindex,
|
|
children: []
|
|
};
|
|
};
|
|
html2canvas.Preload = function(element, opts){
|
|
|
|
var options = {
|
|
"proxy": "http://html2canvas.appspot.com/"
|
|
},
|
|
images = [],
|
|
pageOrigin = window.location.protocol + window.location.host,
|
|
imagesLoaded = 0,
|
|
methods,
|
|
i,
|
|
count = 0,
|
|
doc = element.ownerDocument,
|
|
domImages = doc.images, // TODO probably should limit it to images present in the element only
|
|
imgLen = domImages.length,
|
|
link = doc.createElement("a");
|
|
|
|
opts = opts || {};
|
|
|
|
options = html2canvas.Util.Extend(opts, options);
|
|
|
|
|
|
|
|
element = element || doc.body;
|
|
|
|
function isSameOrigin(url){
|
|
link.href = url;
|
|
return ((link.protocol + link.host) === pageOrigin);
|
|
|
|
}
|
|
|
|
function getIndex(array,src){
|
|
var i, arrLen;
|
|
if (array.indexOf){
|
|
return array.indexOf(src);
|
|
}else{
|
|
for(i = 0, arrLen = array.length; i < arrLen; i+=1){
|
|
if(this[i] === src) {
|
|
return i;
|
|
}
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
}
|
|
|
|
function start(){
|
|
if (images.length === 0 || imagesLoaded === images.length/2){
|
|
|
|
|
|
/*
|
|
this.log('Finished loading '+this.imagesLoaded+' images, Started parsing');
|
|
this.bodyOverflow = document.getElementsByTagName('body')[0].style.overflow;
|
|
document.getElementsByTagName('body')[0].style.overflow = "hidden";
|
|
*/
|
|
if (typeof options.complete === "function"){
|
|
options.complete(images);
|
|
}
|
|
}
|
|
}
|
|
|
|
function proxyGetImage(url, img){
|
|
|
|
link.href = url;
|
|
url = link.href; // work around for pages with base href="" set
|
|
var callback_name,
|
|
scriptUrl = options.proxy,
|
|
script;
|
|
|
|
callback_name = 'html2canvas_' + count;
|
|
|
|
|
|
|
|
if (scriptUrl.indexOf("?") > -1) {
|
|
scriptUrl += "&";
|
|
} else {
|
|
scriptUrl += "?";
|
|
}
|
|
scriptUrl += 'url=' + encodeURIComponent(url) + '&callback=' + callback_name;
|
|
|
|
window[callback_name] = function(a){
|
|
if (a.substring(0,6) === "error:"){
|
|
images.splice(getIndex(images, url), 2);
|
|
start();
|
|
}else{
|
|
img.onload = function(){
|
|
imagesLoaded+=1;
|
|
start();
|
|
};
|
|
|
|
img.src = a;
|
|
}
|
|
delete window[callback_name];
|
|
};
|
|
|
|
count += 1;
|
|
|
|
script = doc.createElement("script");
|
|
script.setAttribute("src", scriptUrl);
|
|
script.setAttribute("type", "text/javascript");
|
|
window.document.body.appendChild(script);
|
|
|
|
/*
|
|
|
|
// enable xhr2 requests where available (no need for base64 / json)
|
|
|
|
$.ajax({
|
|
data:{
|
|
xhr2:false,
|
|
url:url
|
|
},
|
|
url: options.proxy,
|
|
dataType: "jsonp",
|
|
success: function(a){
|
|
|
|
if (a.substring(0,6) === "error:"){
|
|
images.splice(getIndex(images, url), 2);
|
|
start();
|
|
}else{
|
|
img.onload = function(){
|
|
imagesLoaded+=1;
|
|
start();
|
|
|
|
};
|
|
img.src = a;
|
|
}
|
|
|
|
|
|
},
|
|
error: function(){
|
|
images.splice(getIndex(images, url), 2);
|
|
start();
|
|
}
|
|
|
|
|
|
});
|
|
*/
|
|
}
|
|
|
|
function getImages (el) {
|
|
|
|
|
|
|
|
// if (!this.ignoreRe.test(el.nodeName)){
|
|
//
|
|
|
|
var contents = html2canvas.Util.Children(el),
|
|
i,
|
|
contentsLen = contents.length,
|
|
background_image,
|
|
src,
|
|
img;
|
|
|
|
for (i = 0; i < contentsLen; i+=1 ){
|
|
// var ignRe = new RegExp("("+this.ignoreElements+")");
|
|
// if (!ignRe.test(element.nodeName)){
|
|
getImages(contents[i]);
|
|
// }
|
|
}
|
|
|
|
// }
|
|
|
|
if (el.nodeType === 1 || el.nodeType === undefined){
|
|
|
|
background_image = html2canvas.Util.getCSS(el, 'backgroundImage');
|
|
|
|
if ( background_image && background_image !== "1" && background_image !== "none" ) {
|
|
|
|
// TODO add multi image background support
|
|
|
|
if (background_image.substring(0,7) === "-webkit" || background_image.substring(0,3) === "-o-" || background_image.substring(0,4) === "-moz") {
|
|
|
|
img = html2canvas.Generate.Gradient( background_image, html2canvas.Util.Bounds( el ) );
|
|
|
|
if ( img !== undefined ){
|
|
images.push(background_image);
|
|
images.push(img);
|
|
imagesLoaded++;
|
|
start();
|
|
|
|
}
|
|
|
|
} else {
|
|
src = html2canvas.Util.backgroundImage(background_image.match(/data:image\/.*;base64,/i) ? background_image : background_image.split(",")[0]);
|
|
methods.loadImage(src);
|
|
}
|
|
|
|
/*
|
|
if (background_image && background_image !== "1" && background_image !== "none" && background_image.substring(0,7) !== "-webkit" && background_image.substring(0,3)!== "-o-" && background_image.substring(0,4) !== "-moz"){
|
|
// TODO add multi image background support
|
|
src = html2canvas.Util.backgroundImage(background_image.split(",")[0]);
|
|
methods.loadImage(src); */
|
|
}
|
|
}
|
|
}
|
|
|
|
methods = {
|
|
loadImage: function( src ) {
|
|
var img;
|
|
if ( getIndex(images, src) === -1 ) {
|
|
if ( src.match(/data:image\/.*;base64,/i) ) {
|
|
|
|
//Base64 src
|
|
img = new Image();
|
|
img.src = src.replace(/url\(['"]{0,}|['"]{0,}\)$/ig, '');
|
|
|
|
images.push( src );
|
|
images.push( img );
|
|
|
|
imagesLoaded+=1;
|
|
start();
|
|
|
|
}else if ( isSameOrigin( src ) ) {
|
|
|
|
images.push( src );
|
|
img = new Image();
|
|
|
|
img.onload = function() {
|
|
imagesLoaded+=1;
|
|
start();
|
|
|
|
};
|
|
|
|
img.onerror = function() {
|
|
images.splice( getIndex( images, img.src ), 2 );
|
|
start();
|
|
};
|
|
|
|
img.src = src;
|
|
images.push(img);
|
|
|
|
}else if ( options.proxy ){
|
|
// console.log('b'+src);
|
|
images.push( src );
|
|
img = new Image();
|
|
proxyGetImage( src, img );
|
|
images.push( img );
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
};
|
|
|
|
// add something to array
|
|
images.push('start');
|
|
|
|
getImages( element );
|
|
|
|
|
|
// load <img> images
|
|
for (i = 0; i < imgLen; i+=1){
|
|
methods.loadImage( domImages[i].getAttribute( "src" ) );
|
|
}
|
|
|
|
// remove 'start'
|
|
images.splice(0, 1);
|
|
|
|
if ( images.length === 0 ) {
|
|
start();
|
|
}
|
|
|
|
return methods;
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
html2canvas.canvasContext = function (width, height) {
|
|
this.storage = [];
|
|
this.width = width;
|
|
this.height = height;
|
|
//this.zIndex;
|
|
|
|
this.fillRect = function(){
|
|
this.storage.push(
|
|
{
|
|
type: "function",
|
|
name: "fillRect",
|
|
'arguments': arguments
|
|
});
|
|
|
|
};
|
|
|
|
|
|
this.drawImage = function () {
|
|
this.storage.push(
|
|
{
|
|
type: "function",
|
|
name: "drawImage",
|
|
'arguments': arguments
|
|
});
|
|
};
|
|
|
|
|
|
this.fillText = function () {
|
|
|
|
this.storage.push(
|
|
{
|
|
type: "function",
|
|
name: "fillText",
|
|
'arguments': arguments
|
|
});
|
|
};
|
|
|
|
|
|
this.setVariable = function(variable, value) {
|
|
this.storage.push(
|
|
{
|
|
type: "variable",
|
|
name: variable,
|
|
'arguments': value
|
|
});
|
|
};
|
|
|
|
return this;
|
|
|
|
};
|
|
html2canvas.Renderer = function(parseQueue, opts){
|
|
|
|
|
|
var options = {
|
|
"width": 0,
|
|
"height": 0,
|
|
"renderer": "canvas"
|
|
},
|
|
queue = [],
|
|
canvas,
|
|
doc = document;
|
|
|
|
options = html2canvas.Util.Extend(opts, options);
|
|
|
|
|
|
|
|
function sortZ(zStack){
|
|
var subStacks = [],
|
|
stackValues = [],
|
|
zStackChildren = zStack.children,
|
|
s,
|
|
i,
|
|
stackLen,
|
|
zValue,
|
|
zLen,
|
|
stackChild,
|
|
b,
|
|
subStackLen;
|
|
|
|
|
|
for (s = 0, zLen = zStackChildren.length; s < zLen; s+=1){
|
|
|
|
stackChild = zStackChildren[s];
|
|
|
|
if (stackChild.children && stackChild.children.length > 0){
|
|
subStacks.push(stackChild);
|
|
stackValues.push(stackChild.zindex);
|
|
}else{
|
|
queue.push(stackChild);
|
|
}
|
|
|
|
}
|
|
|
|
stackValues.sort(function(a, b) {
|
|
return a - b;
|
|
});
|
|
|
|
for (i = 0, stackLen = stackValues.length; i < stackLen; i+=1){
|
|
zValue = stackValues[i];
|
|
for (b = 0, subStackLen = subStacks.length; b <= subStackLen; b+=1){
|
|
|
|
if (subStacks[b].zindex === zValue){
|
|
stackChild = subStacks.splice(b, 1);
|
|
sortZ(stackChild[0]);
|
|
break;
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
function canvasRenderer(zStack){
|
|
|
|
sortZ(zStack.zIndex);
|
|
|
|
|
|
var ctx = canvas.getContext("2d"),
|
|
storageContext,
|
|
i,
|
|
queueLen,
|
|
a,
|
|
storageLen,
|
|
renderItem;
|
|
|
|
canvas.width = Math.max(zStack.ctx.width, options.width);
|
|
canvas.height = Math.max(zStack.ctx.height, options.height);
|
|
|
|
|
|
for (i = 0, queueLen = queue.length; i < queueLen; i+=1){
|
|
|
|
storageContext = queue.splice(0, 1)[0];
|
|
storageContext.canvasPosition = storageContext.canvasPosition || {};
|
|
|
|
//this.canvasRenderContext(storageContext,parentctx);
|
|
|
|
// set common settings for canvas
|
|
ctx.textBaseline = "bottom";
|
|
|
|
if (storageContext.clip){
|
|
ctx.save();
|
|
ctx.beginPath();
|
|
// console.log(storageContext);
|
|
ctx.rect(storageContext.clip.left, storageContext.clip.top, storageContext.clip.width, storageContext.clip.height);
|
|
ctx.clip();
|
|
|
|
}
|
|
|
|
if (storageContext.ctx.storage){
|
|
|
|
for (a = 0, storageLen = storageContext.ctx.storage.length; a < storageLen; a+=1){
|
|
|
|
renderItem = storageContext.ctx.storage[a];
|
|
|
|
|
|
|
|
switch(renderItem.type){
|
|
case "variable":
|
|
ctx[renderItem.name] = renderItem['arguments'];
|
|
break;
|
|
case "function":
|
|
if (renderItem.name === "fillRect") {
|
|
|
|
ctx.fillRect(
|
|
renderItem['arguments'][0],
|
|
renderItem['arguments'][1],
|
|
renderItem['arguments'][2],
|
|
renderItem['arguments'][3]
|
|
);
|
|
}else if(renderItem.name === "fillText") {
|
|
// console.log(renderItem.arguments[0]);
|
|
ctx.fillText(renderItem['arguments'][0],renderItem['arguments'][1],renderItem['arguments'][2]);
|
|
|
|
}else if(renderItem.name === "drawImage") {
|
|
// console.log(renderItem);
|
|
// console.log(renderItem.arguments[0].width);
|
|
if (renderItem['arguments'][8] > 0 && renderItem['arguments'][7]){
|
|
ctx.drawImage(
|
|
renderItem['arguments'][0],
|
|
renderItem['arguments'][1],
|
|
renderItem['arguments'][2],
|
|
renderItem['arguments'][3],
|
|
renderItem['arguments'][4],
|
|
renderItem['arguments'][5],
|
|
renderItem['arguments'][6],
|
|
renderItem['arguments'][7],
|
|
renderItem['arguments'][8]
|
|
);
|
|
}
|
|
}
|
|
|
|
|
|
break;
|
|
default:
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
if (storageContext.clip){
|
|
ctx.restore();
|
|
}
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
// this.canvasRenderStorage(queue,this.ctx);
|
|
return canvas;
|
|
}
|
|
|
|
function svgRenderer(zStack){
|
|
sortZ(zStack.zIndex);
|
|
|
|
var svgNS = "http://www.w3.org/2000/svg",
|
|
svg = doc.createElementNS(svgNS, "svg"),
|
|
xlinkNS = "http://www.w3.org/1999/xlink",
|
|
defs = doc.createElementNS(svgNS, "defs"),
|
|
i,
|
|
a,
|
|
queueLen,
|
|
storageLen,
|
|
storageContext,
|
|
renderItem,
|
|
el,
|
|
settings = {},
|
|
text,
|
|
fontStyle,
|
|
clipId = 0;
|
|
|
|
svg.setAttribute("version", "1.1");
|
|
svg.setAttribute("baseProfile", "full");
|
|
|
|
svg.setAttribute("viewBox", "0 0 " + Math.max(zStack.ctx.width, options.width) + " " + Math.max(zStack.ctx.height, options.height));
|
|
svg.setAttribute("width", Math.max(zStack.ctx.width, options.width) + "px");
|
|
svg.setAttribute("height", Math.max(zStack.ctx.height, options.height) + "px");
|
|
svg.setAttribute("preserveAspectRatio", "none");
|
|
svg.appendChild(defs);
|
|
|
|
|
|
|
|
for (i = 0, queueLen = queue.length; i < queueLen; i+=1){
|
|
|
|
storageContext = queue.splice(0, 1)[0];
|
|
storageContext.canvasPosition = storageContext.canvasPosition || {};
|
|
|
|
//this.canvasRenderContext(storageContext,parentctx);
|
|
|
|
|
|
/*
|
|
if (storageContext.clip){
|
|
ctx.save();
|
|
ctx.beginPath();
|
|
// console.log(storageContext);
|
|
ctx.rect(storageContext.clip.left, storageContext.clip.top, storageContext.clip.width, storageContext.clip.height);
|
|
ctx.clip();
|
|
|
|
}*/
|
|
|
|
if (storageContext.ctx.storage){
|
|
|
|
for (a = 0, storageLen = storageContext.ctx.storage.length; a < storageLen; a+=1){
|
|
|
|
renderItem = storageContext.ctx.storage[a];
|
|
|
|
|
|
|
|
switch(renderItem.type){
|
|
case "variable":
|
|
settings[renderItem.name] = renderItem['arguments'];
|
|
break;
|
|
case "function":
|
|
if (renderItem.name === "fillRect") {
|
|
|
|
el = doc.createElementNS(svgNS, "rect");
|
|
el.setAttribute("x", renderItem['arguments'][0]);
|
|
el.setAttribute("y", renderItem['arguments'][1]);
|
|
el.setAttribute("width", renderItem['arguments'][2]);
|
|
el.setAttribute("height", renderItem['arguments'][3]);
|
|
el.setAttribute("fill", settings.fillStyle);
|
|
svg.appendChild(el);
|
|
|
|
} else if(renderItem.name === "fillText") {
|
|
el = doc.createElementNS(svgNS, "text");
|
|
|
|
fontStyle = settings.font.split(" ");
|
|
|
|
el.style.fontVariant = fontStyle.splice(0, 1)[0];
|
|
el.style.fontWeight = fontStyle.splice(0, 1)[0];
|
|
el.style.fontStyle = fontStyle.splice(0, 1)[0];
|
|
el.style.fontSize = fontStyle.splice(0, 1)[0];
|
|
|
|
el.setAttribute("x", renderItem['arguments'][1]);
|
|
el.setAttribute("y", renderItem['arguments'][2] - (parseInt(el.style.fontSize, 10) + 3));
|
|
|
|
el.setAttribute("fill", settings.fillStyle);
|
|
|
|
|
|
|
|
|
|
// TODO get proper baseline
|
|
el.style.dominantBaseline = "text-before-edge";
|
|
el.style.fontFamily = fontStyle.join(" ");
|
|
|
|
text = doc.createTextNode(renderItem['arguments'][0]);
|
|
el.appendChild(text);
|
|
|
|
|
|
svg.appendChild(el);
|
|
|
|
|
|
|
|
} else if(renderItem.name === "drawImage") {
|
|
|
|
if (renderItem['arguments'][8] > 0 && renderItem['arguments'][7]){
|
|
|
|
// TODO check whether even any clipping is necessary for this particular image
|
|
el = doc.createElementNS(svgNS, "clipPath");
|
|
el.setAttribute("id", "clipId" + clipId);
|
|
|
|
text = doc.createElementNS(svgNS, "rect");
|
|
text.setAttribute("x", renderItem['arguments'][5] );
|
|
text.setAttribute("y", renderItem['arguments'][6]);
|
|
|
|
text.setAttribute("width", renderItem['arguments'][3]);
|
|
text.setAttribute("height", renderItem['arguments'][4]);
|
|
el.appendChild(text);
|
|
defs.appendChild(el);
|
|
|
|
el = doc.createElementNS(svgNS, "image");
|
|
el.setAttributeNS(xlinkNS, "xlink:href", renderItem['arguments'][0].src);
|
|
el.setAttribute("width", renderItem['arguments'][0].width);
|
|
el.setAttribute("height", renderItem['arguments'][0].height);
|
|
el.setAttribute("x", renderItem['arguments'][5] - renderItem['arguments'][1]);
|
|
el.setAttribute("y", renderItem['arguments'][6] - renderItem['arguments'][2]);
|
|
el.setAttribute("clip-path", "url(#clipId" + clipId + ")");
|
|
// el.setAttribute("xlink:href", );
|
|
|
|
|
|
el.setAttribute("preserveAspectRatio", "none");
|
|
|
|
svg.appendChild(el);
|
|
|
|
|
|
clipId += 1;
|
|
/*
|
|
ctx.drawImage(
|
|
renderItem['arguments'][0],
|
|
renderItem['arguments'][1],
|
|
renderItem['arguments'][2],
|
|
renderItem['arguments'][3],
|
|
renderItem['arguments'][4],
|
|
renderItem['arguments'][5],
|
|
renderItem['arguments'][6],
|
|
renderItem['arguments'][7],
|
|
renderItem['arguments'][8]
|
|
);
|
|
*/
|
|
}
|
|
}
|
|
|
|
|
|
|
|
break;
|
|
default:
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
/*
|
|
if (storageContext.clip){
|
|
ctx.restore();
|
|
}
|
|
*/
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
return svg;
|
|
|
|
}
|
|
|
|
|
|
//this.each(this.opts.renderOrder.split(" "),function(i,renderer){
|
|
|
|
//options.renderer = "svg";
|
|
|
|
switch(options.renderer.toLowerCase()){
|
|
case "canvas":
|
|
canvas = doc.createElement('canvas');
|
|
if (canvas.getContext){
|
|
return canvasRenderer(parseQueue);
|
|
}
|
|
break;
|
|
case "svg":
|
|
if (doc.createElementNS){
|
|
return svgRenderer(parseQueue);
|
|
}
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
//});
|
|
|
|
return this;
|
|
|
|
|
|
|
|
};
|
|
|
|
|
|
|