mirror of
https://github.com/niklasvh/html2canvas.git
synced 2023-08-10 21:13:10 +03:00
683742bfbe
renamed the html2canvas.canvasContext to h2cRenderContext, it's used by both backends and thus not canvas specific
1273 lines
40 KiB
JavaScript
1273 lines
40 KiB
JavaScript
/*
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html2canvas @VERSION@ <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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* New function for traversing elements
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*/
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html2canvas.Parse = function (element, images, opts) {
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window.scroll(0,0);
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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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options = html2canvas.Util.Extend(opts, options);
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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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var getCSS = html2canvas.Util.getCSS;
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function getCSSInt(element, attribute) {
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var val = parseInt(getCSS(element, attribute), 10);
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return (isNaN(val)) ? 0 : val; // borders in old IE are throwing 'medium' for demo.html
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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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// http://probablyprogramming.com/2009/03/15/the-tiniest-gif-ever (handtinywhite.gif)
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img.src = "data:image/gif;base64,R0lGODlhAQABAIABAP///wAAACwAAAAAAQABAAACAkQBADs=";
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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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img.style.verticalAlign = "baseline";
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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"),
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size = getCSS(el, "fontSize"),
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color = getCSS(el, "color"),
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text_decoration = getCSS(el, "textDecoration"),
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text_align = getCSS(el, "textAlign"),
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letter_spacing = getCSS(el, "letterSpacing"),
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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"),
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font_style = getCSS(el, "fontStyle"),
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font_variant = getCSS(el, "fontVariant"),
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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"));
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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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/*
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if (stack.clip){
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ctx.rect (stack.clip.left, stack.clip.top, stack.clip.width, stack.clip.height);
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ctx.clip();
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}
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*/
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oldTextNode = textNode;
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for (c=0; c < renderList.length; c+=1) {
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textValue = null;
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if (support.rangeBounds){
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// getBoundingClientRect is supported for ranges
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if (text_decoration !== "none" || trimText(renderList[c]).length !== 0) {
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textValue = renderList[c];
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if (doc.createRange){
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range = doc.createRange();
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range.setStart(textNode, textOffset);
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range.setEnd(textNode, textOffset + textValue.length);
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}else{
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// TODO add IE support
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range = body.createTextRange();
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}
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if (range.getBoundingClientRect()) {
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bounds = range.getBoundingClientRect();
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}else{
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bounds = {};
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}
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}
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}else{
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// it isn't supported, so let's wrap it inside an element instead and get the bounds there
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// IE 9 bug
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if (typeof oldTextNode.nodeValue !== "string" ){
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continue;
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}
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newTextNode = oldTextNode.splitText(renderList[c].length);
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parent = oldTextNode.parentNode;
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wrapElement = doc.createElement('wrapper');
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backupText = oldTextNode.cloneNode(true);
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wrapElement.appendChild(oldTextNode.cloneNode(true));
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parent.replaceChild(wrapElement, oldTextNode);
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bounds = html2canvas.Util.Bounds(wrapElement);
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textValue = oldTextNode.nodeValue;
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oldTextNode = newTextNode;
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parent.replaceChild(backupText, wrapElement);
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}
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if (textValue !== null){
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drawText(textValue, bounds.left, bounds.bottom, ctx);
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}
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switch(text_decoration) {
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case "underline":
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// Draws a line at the baseline of the font
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// 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
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renderRect(ctx, bounds.left, Math.round(bounds.top + metrics.baseline + metrics.lineWidth), bounds.width, 1, color);
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break;
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case "overline":
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renderRect(ctx, bounds.left, bounds.top, bounds.width, 1, color);
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break;
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case "line-through":
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// TODO try and find exact position for line-through
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renderRect(ctx, bounds.left, Math.ceil(bounds.top + metrics.middle + metrics.lineWidth), bounds.width, 1, color);
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break;
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}
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textOffset += renderList[c].length;
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}
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}
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}
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function listPosition (element, val) {
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var boundElement = doc.createElement( "boundelement" ),
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type,
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bounds;
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boundElement.style.display = "inline";
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//boundElement.style.width = "1px";
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//boundElement.style.height = "1px";
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type = element.style.listStyleType;
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element.style.listStyleType = "none";
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boundElement.appendChild( doc.createTextNode( val ) );
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element.insertBefore(boundElement, element.firstChild);
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bounds = html2canvas.Util.Bounds( boundElement );
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element.removeChild( boundElement );
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element.style.listStyleType = type;
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return bounds;
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}
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function renderListItem(element, stack, elBounds) {
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var position = getCSS(element, "listStylePosition"),
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x,
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y,
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type = getCSS(element, "listStyleType"),
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currentIndex,
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text,
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listBounds,
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bold = getCSS(element, "fontWeight");
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if (/^(decimal|decimal-leading-zero|upper-alpha|upper-latin|upper-roman|lower-alpha|lower-greek|lower-latin|lower-roman)$/i.test(type)) {
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// TODO remove jQuery dependency
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currentIndex = $(element).index()+1;
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switch(type){
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case "decimal":
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text = currentIndex;
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break;
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case "decimal-leading-zero":
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if (currentIndex.toString().length === 1){
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text = currentIndex = "0" + currentIndex.toString();
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}else{
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text = currentIndex.toString();
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}
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break;
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case "upper-roman":
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text = html2canvas.Generate.ListRoman( currentIndex );
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break;
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case "lower-roman":
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text = html2canvas.Generate.ListRoman( currentIndex ).toLowerCase();
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break;
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case "lower-alpha":
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text = html2canvas.Generate.ListAlpha( currentIndex ).toLowerCase();
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break;
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case "upper-alpha":
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text = html2canvas.Generate.ListAlpha( currentIndex );
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break;
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}
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text += ". ";
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listBounds = listPosition(element, text);
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switch(bold){
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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", getCSS(element, "color") );
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ctx.setVariable( "font", getCSS(element, "fontVariant") + " " + bold + " " + getCSS(element, "fontStyle") + " " + getCSS(element, "fontSize") + " " + getCSS(element, "fontFamily") );
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if ( position === "inside" ) {
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ctx.setVariable("textAlign", "left");
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// this.setFont(stack.ctx, element, false);
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x = elBounds.left;
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}else{
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return;
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/*
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TODO really need to figure out some more accurate way to try and find the position.
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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
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may display it whatever way it feels like.
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"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"
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*/
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ctx.setVariable("textAlign", "right");
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// this.setFont(stack.ctx, element, true);
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x = elBounds.left - 10;
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}
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y = listBounds.bottom;
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drawText(text, x, y, ctx)
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}
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}
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function loadImage (src){
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var img = images[src];
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if (img && img.succeeded === true) {
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return img.img;
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} else {
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return false;
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}
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}
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function clipBounds(src, dst){
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var x = Math.max(src.left, dst.left),
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y = Math.max(src.top, dst.top),
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x2 = Math.min((src.left + src.width), (dst.left + dst.width)),
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y2 = Math.min((src.top + src.height), (dst.top + dst.height));
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return {
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left:x,
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top:y,
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width:x2-x,
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height:y2-y
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};
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}
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function setZ(zIndex, parentZ){
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// TODO fix static elements overlapping relative/absolute elements under same stack, if they are defined after them
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if (!parentZ){
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this.zStack = h2czContext(0);
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return this.zStack;
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}
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if (zIndex !== "auto"){
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needReorder = true;
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var newContext = h2czContext(zIndex);
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parentZ.children.push(newContext);
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return newContext;
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}
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return parentZ;
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}
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function renderBorders(el, ctx, bounds, clip){
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/*
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* TODO add support for different border-style's than solid
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*/
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var x = bounds.left,
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y = bounds.top,
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w = bounds.width,
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h = bounds.height,
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borderSide,
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borderData,
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bx,
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by,
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bw,
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bh,
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borderBounds,
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borders = (function(el){
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var borders = [],
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sides = ["Top","Right","Bottom","Left"],
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s;
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for (s = 0; s < 4; s+=1){
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borders.push({
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width: getCSSInt(el, 'border' + sides[s] + 'Width'),
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color: getCSS(el, 'border' + sides[s] + 'Color')
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});
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}
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return borders;
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}(el));
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for (borderSide = 0; borderSide < 4; borderSide+=1){
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borderData = borders[borderSide];
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if (borderData.width>0){
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bx = x;
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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];
|
|
|
|
try {
|
|
valueWrap.style[style] = getCSS(el, style);
|
|
} catch( e ) {
|
|
// Older IE has issues with "border"
|
|
html2canvas.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";
|
|
|
|
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 bgposition = (function( bgp ){
|
|
|
|
if (bgp !== undefined) {
|
|
return (bgp.split(",")[0] || "0 0").split(" ");
|
|
} else {
|
|
// Older IE uses -x and -y
|
|
return [ getCSS(el, "backgroundPositionX"), getCSS(el, "backgroundPositionY") ];
|
|
}
|
|
|
|
|
|
})( getCSS(el, "backgroundPosition") ),
|
|
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"),
|
|
background_repeat = getCSS(el, "backgroundRepeat").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{
|
|
h2clog("html2canvas: 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"),
|
|
cssPosition = getCSS(el, "position"),
|
|
zindex,
|
|
opacity = getCSS(el, "opacity"),
|
|
stack,
|
|
stackLength,
|
|
borders,
|
|
ctx,
|
|
bgbounds,
|
|
imgSrc,
|
|
paddingLeft,
|
|
paddingTop,
|
|
paddingRight,
|
|
paddingBottom;
|
|
|
|
if (!parentStack){
|
|
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"), parentStack.zIndex );
|
|
|
|
|
|
|
|
stack = {
|
|
ctx: h2cRenderContext( 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, false);
|
|
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 = getCSSInt(el, 'paddingLeft');
|
|
paddingTop = getCSSInt(el, 'paddingTop');
|
|
paddingRight = getCSSInt(el, 'paddingRight');
|
|
paddingBottom = getCSSInt(el, 'paddingBottom');
|
|
|
|
|
|
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{
|
|
h2clog("html2canvas: 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;
|
|
case "CANVAS":
|
|
paddingLeft = getCSSInt(el, 'paddingLeft');
|
|
paddingTop = getCSSInt(el, 'paddingTop');
|
|
paddingRight = getCSSInt(el, 'paddingRight');
|
|
paddingBottom = getCSSInt(el, 'paddingBottom');
|
|
renderImage(
|
|
ctx,
|
|
el,
|
|
0, //sx
|
|
0, //sy
|
|
el.width, //sw
|
|
el.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
|
|
);
|
|
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, null);
|
|
|
|
// parse every child element
|
|
for (i = 0, children = element.children, childrenLen = children.length; i < childrenLen; i+=1){
|
|
parseElement(children[i], stack);
|
|
}
|
|
|
|
return stack;
|
|
|
|
};
|
|
|
|
function h2czContext(zindex) {
|
|
return {
|
|
zindex: zindex,
|
|
children: []
|
|
};
|
|
};
|