mirror of
https://github.com/niklasvh/html2canvas.git
synced 2023-08-10 21:13:10 +03:00
1224 lines
50 KiB
JavaScript
1224 lines
50 KiB
JavaScript
/*
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html2canvas 0.5.0-rc1 <http://html2canvas.hertzen.com>
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Copyright (c) 2014 Niklas von Hertzen
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Released under MIT License
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*/
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(function(window, document, undefined){
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window.html2canvas = function(nodeList, options) {
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options = options || {};
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if (options.logging) {
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window.html2canvas.logging = true;
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window.html2canvas.start = Date.now();
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}
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createWindowClone(document, window.innerWidth, window.innerHeight).then(function(container) {
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log("Document cloned");
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var clonedWindow = container.contentWindow;
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var element = (nodeList === undefined) ? document.body : nodeList[0];
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var node = clonedWindow.document.documentElement;
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var support = new Support();
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var imageLoader = new ImageLoader(options, support);
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var renderer = new CanvasRenderer(documentWidth(), documentHeight(), imageLoader);
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var parser = new NodeParser(node, renderer, support, imageLoader, options);
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window.console.log(parser);
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});
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};
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function documentWidth () {
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return Math.max(
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Math.max(document.body.scrollWidth, document.documentElement.scrollWidth),
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Math.max(document.body.offsetWidth, document.documentElement.offsetWidth),
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Math.max(document.body.clientWidth, document.documentElement.clientWidth)
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);
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}
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function documentHeight () {
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return Math.max(
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Math.max(document.body.scrollHeight, document.documentElement.scrollHeight),
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Math.max(document.body.offsetHeight, document.documentElement.offsetHeight),
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Math.max(document.body.clientHeight, document.documentElement.clientHeight)
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);
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}
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function createWindowClone(ownerDocument, width, height) {
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var documentElement = ownerDocument.documentElement.cloneNode(true),
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container = ownerDocument.createElement("iframe");
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container.style.display = "hidden";
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container.style.position = "absolute";
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container.style.width = width + "px";
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container.style.height = height + "px";
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ownerDocument.body.appendChild(container);
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return new Promise(function(resolve) {
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var loadedTimer = function() {
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/* Chrome doesn't detect relative background-images assigned in style sheets when fetched through getComputedStyle,
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before a certain time has passed
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*/
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if (container.contentWindow.getComputedStyle(div, null)['backgroundImage'] !== "none") {
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documentClone.body.removeChild(div);
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documentClone.body.removeChild(style);
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resolve(container);
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} else {
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window.setTimeout(loadedTimer, 10);
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}
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};
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var documentClone = container.contentWindow.document;
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/* Chrome doesn't detect relative background-images assigned in inline <style> sheets when fetched through getComputedStyle
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if window url is about:blank, we can assign the url to current by writing onto the document
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*/
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documentClone.open();
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documentClone.write("");
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documentClone.close();
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documentClone.replaceChild(documentClone.adoptNode(documentElement), documentClone.documentElement);
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container.contentWindow.scrollTo(window.scrollX, window.scrollY);
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var div = documentClone.createElement("div");
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div.className = "html2canvas-ready-test";
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documentClone.body.appendChild(div);
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var style = documentClone.createElement("style");
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style.innerHTML = "body div.html2canvas-ready-test { background-image:url(data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7); }";
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documentClone.body.appendChild(style);
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loadedTimer();
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});
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}
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function NodeParser(element, renderer, support, imageLoader, options) {
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this.renderer = renderer;
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this.options = options;
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this.range = null;
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this.support = support;
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this.stack = new StackingContext(true, 1, element.ownerDocument, null);
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var parent = new NodeContainer(element, null);
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parent.visibile = parent.isElementVisible();
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this.nodes = [parent].concat(this.getChildren(parent)).filter(function(container) {
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return container.visible = container.isElementVisible();
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});
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this.images = imageLoader.fetch(this.nodes.filter(isElement));
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this.createStackingContexts();
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this.sortStackingContexts(this.stack);
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this.images.ready.then(bind(function() {
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log("Images loaded, starting parsing");
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this.parse(this.stack);
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options.onrendered(renderer.canvas);
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}, this));
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}
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NodeParser.prototype.getChildren = function(parentContainer) {
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return flatten([].filter.call(parentContainer.node.childNodes, renderableNode).map(function(node) {
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var container = [node.nodeType === Node.TEXT_NODE ? new TextContainer(node, parentContainer) : new NodeContainer(node, parentContainer)].filter(nonIgnoredElement);
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return node.nodeType === Node.ELEMENT_NODE && container.length ? (container[0].isElementVisible() ? container.concat(this.getChildren(container[0])) : []) : container;
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}, this));
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};
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NodeParser.prototype.newStackingContext = function(container, hasOwnStacking) {
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var stack = new StackingContext(hasOwnStacking, container.cssFloat('opacity'), container.node, container.parent);
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stack.visible = container.visible;
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var parentStack = stack.getParentStack(this);
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parentStack.contexts.push(stack);
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container.stack = stack;
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};
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NodeParser.prototype.createStackingContexts = function() {
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this.nodes.forEach(function(container) {
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if (isElement(container) && (this.isRootElement(container) || hasOpacity(container) || isPositionedForStacking(container) || this.isBodyWithTransparentRoot(container))) {
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this.newStackingContext(container, true);
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} else if (isElement(container) && (isPositioned(container))) {
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this.newStackingContext(container, false);
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} else {
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container.assignStack(container.parent.stack);
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}
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}, this);
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};
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NodeParser.prototype.isBodyWithTransparentRoot = function(container) {
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return container.node.nodeName === "BODY" && this.renderer.isTransparent(container.parent.css('backgroundColor'));
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};
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NodeParser.prototype.isRootElement = function(container) {
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return container.node.nodeName === "HTML";
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};
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NodeParser.prototype.sortStackingContexts = function(stack) {
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stack.contexts.sort(zIndexSort);
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stack.contexts.forEach(this.sortStackingContexts, this);
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};
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NodeParser.prototype.parseBounds = function(nodeContainer) {
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return nodeContainer.bounds = this.getBounds(nodeContainer.node);
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};
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NodeParser.prototype.getBounds = function(node) {
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if (node.getBoundingClientRect) {
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var clientRect = node.getBoundingClientRect();
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return {
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top: clientRect.top,
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bottom: clientRect.bottom || (clientRect.top + clientRect.height),
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left: clientRect.left,
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width: node.offsetWidth,
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height: node.offsetHeight
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};
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}
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return {};
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};
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NodeParser.prototype.parseTextBounds = function(container) {
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return function(text, index, textList) {
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if (container.parent.css("textDecoration") !== "none" || text.trim().length !== 0) {
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var offset = textList.slice(0, index).join("").length;
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if (this.support.rangeBounds) {
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return this.getRangeBounds(container.node, offset, text.length);
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} else if (container.node && typeof(container.node.data) === "string") {
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var replacementNode = container.node.splitText(text.length);
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var bounds = this.getWrapperBounds(container.node);
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container.node = replacementNode;
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return bounds;
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}
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}
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};
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};
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NodeParser.prototype.getWrapperBounds = function(node) {
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var wrapper = node.ownerDocument.createElement('wrapper');
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var parent = node.parentNode,
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backupText = node.cloneNode(true);
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wrapper.appendChild(node.cloneNode(true));
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parent.replaceChild(wrapper, node);
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var bounds = this.getBounds(wrapper);
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parent.replaceChild(backupText, wrapper);
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return bounds;
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};
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NodeParser.prototype.getRangeBounds = function(node, offset, length) {
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var range = this.range || (this.range = node.ownerDocument.createRange());
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range.setStart(node, offset);
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range.setEnd(node, offset + length);
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return range.getBoundingClientRect();
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};
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function negativeZIndex(container) {
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return container.cssInt("zIndex") < 0;
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}
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function positiveZIndex(container) {
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return container.cssInt("zIndex") > 0;
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}
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function zIndex0(container) {
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return container.cssInt("zIndex") === 0;
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}
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function inlineLevel(container) {
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return ["inline", "inline-block", "inline-table"].indexOf(container.css("display")) !== -1;
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}
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function isStackingContext(container) {
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return (container instanceof StackingContext);
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}
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function hasText(container) {
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return container.node.data.trim().length > 0;
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}
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function noLetterSpacing(container) {
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return (/^(normal|none|0px)$/.test(container.parent.css("letterSpacing")));
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}
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NodeParser.prototype.parse = function(stack) {
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// http://www.w3.org/TR/CSS21/visuren.html#z-index
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var negativeZindex = stack.contexts.filter(negativeZIndex); // 2. the child stacking contexts with negative stack levels (most negative first).
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var descendantElements = stack.children.filter(isElement);
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var descendantNonFloats = descendantElements.filter(not(isFloating));
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var nonInlineNonPositionedDescendants = descendantNonFloats.filter(not(isPositioned)).filter(not(inlineLevel)); // 3 the in-flow, non-inline-level, non-positioned descendants.
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var nonPositionedFloats = descendantElements.filter(not(isPositioned)).filter(isFloating); // 4. the non-positioned floats.
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var inFlow = descendantNonFloats.filter(not(isPositioned)).filter(inlineLevel); // 5. the in-flow, inline-level, non-positioned descendants, including inline tables and inline blocks.
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var stackLevel0 = stack.contexts.concat(descendantNonFloats.filter(isPositioned)).filter(zIndex0); // 6. the child stacking contexts with stack level 0 and the positioned descendants with stack level 0.
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var text = stack.children.filter(isTextNode).filter(hasText);
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var positiveZindex = stack.contexts.filter(positiveZIndex); // 7. the child stacking contexts with positive stack levels (least positive first).
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var rendered = [];
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negativeZindex.concat(nonInlineNonPositionedDescendants).concat(nonPositionedFloats)
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.concat(inFlow).concat(stackLevel0).concat(text).concat(positiveZindex).forEach(function(container) {
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this.paint(container);
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if (rendered.indexOf(container.node) !== -1) {
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log(container, container.node);
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throw new Error("rendering twice");
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}
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rendered.push(container.node);
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if (isStackingContext(container)) {
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this.parse(container);
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}
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}, this);
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};
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NodeParser.prototype.paint = function(container) {
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try {
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if (isTextNode(container)) {
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this.paintText(container);
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} else {
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this.paintNode(container);
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}
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} catch(e) {
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log(e);
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}
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};
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NodeParser.prototype.paintNode = function(container) {
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if (isStackingContext(container)) {
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this.renderer.setOpacity(container.opacity);
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}
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var bounds = this.parseBounds(container);
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var borderData = this.parseBorders(container);
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this.renderer.clip(borderData.clip, function() {
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this.renderer.renderBackground(container, bounds);
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}, this);
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this.renderer.renderBorders(borderData.borders);
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switch(container.node.nodeName) {
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case "IMG":
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var imageContainer = this.images.get(container.node.src);
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if (imageContainer) {
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this.renderer.renderImage(container, bounds, borderData, imageContainer.image);
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} else {
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log("Error loading <img>", container.node.src);
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}
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break;
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}
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};
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NodeParser.prototype.paintText = function(container) {
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container.applyTextTransform();
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var textList = container.node.data.split(!this.options.letterRendering || noLetterSpacing(container) ? /(\b| )/ : "");
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var weight = container.parent.fontWeight();
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var size = container.parent.css('fontSize');
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var family = container.parent.css('fontFamily');
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this.renderer.font(container.parent.css('color'), container.parent.css('fontStyle'), container.parent.css('fontVariant'), weight, size, family);
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textList.map(this.parseTextBounds(container), this).forEach(function(bounds, index) {
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if (bounds) {
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this.renderer.text(textList[index], bounds.left, bounds.bottom);
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// renderTextDecoration(ctx, textDecoration, bounds, metrics, color);
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}
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/* var bounds = getTextBounds(state, text, textDecoration, (index < textList.length - 1), stack.transform.matrix);
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if (bounds) {
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drawText(text, bounds.left, bounds.bottom, ctx);
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renderTextDecoration(ctx, textDecoration, bounds, metrics, color);
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} */
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}, this);
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};
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NodeParser.prototype.parseBorders = function(container) {
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var nodeBounds = container.bounds;
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var radius = getBorderRadiusData(container);
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var borders = ["Top", "Right", "Bottom", "Left"].map(function(side) {
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return {
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width: container.cssInt('border' + side + 'Width'),
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color: container.css('border' + side + 'Color'),
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args: null
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};
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});
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var borderPoints = calculateCurvePoints(nodeBounds, radius, borders);
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return {
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clip: this.parseBackgroundClip(container, borderPoints, borders, radius, nodeBounds),
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borders: borders.map(function(border, borderSide) {
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if (border.width > 0) {
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var bx = nodeBounds.left;
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var by = nodeBounds.top;
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var bw = nodeBounds.width;
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var bh = nodeBounds.height - (borders[2].width);
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switch(borderSide) {
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case 0:
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// top border
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bh = borders[0].width;
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border.args = drawSide({
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c1: [bx, by],
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c2: [bx + bw, by],
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c3: [bx + bw - borders[1].width, by + bh],
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c4: [bx + borders[3].width, by + bh]
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}, radius[0], radius[1],
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borderPoints.topLeftOuter, borderPoints.topLeftInner, borderPoints.topRightOuter, borderPoints.topRightInner);
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break;
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case 1:
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// right border
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bx = nodeBounds.left + nodeBounds.width - (borders[1].width);
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bw = borders[1].width;
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border.args = drawSide({
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c1: [bx + bw, by],
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c2: [bx + bw, by + bh + borders[2].width],
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c3: [bx, by + bh],
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c4: [bx, by + borders[0].width]
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}, radius[1], radius[2],
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borderPoints.topRightOuter, borderPoints.topRightInner, borderPoints.bottomRightOuter, borderPoints.bottomRightInner);
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break;
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case 2:
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// bottom border
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by = (by + nodeBounds.height) - (borders[2].width);
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bh = borders[2].width;
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border.args = drawSide({
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c1: [bx + bw, by + bh],
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c2: [bx, by + bh],
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c3: [bx + borders[3].width, by],
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c4: [bx + bw - borders[3].width, by]
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}, radius[2], radius[3],
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borderPoints.bottomRightOuter, borderPoints.bottomRightInner, borderPoints.bottomLeftOuter, borderPoints.bottomLeftInner);
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break;
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case 3:
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// left border
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bw = borders[3].width;
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border.args = drawSide({
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c1: [bx, by + bh + borders[2].width],
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c2: [bx, by],
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c3: [bx + bw, by + borders[0].width],
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c4: [bx + bw, by + bh]
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}, radius[3], radius[0],
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borderPoints.bottomLeftOuter, borderPoints.bottomLeftInner, borderPoints.topLeftOuter, borderPoints.topLeftInner);
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break;
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}
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}
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return border;
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})
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};
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};
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NodeParser.prototype.parseBackgroundClip = function(container, borderPoints, borders, radius, bounds) {
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var backgroundClip = container.css('backgroundClip'),
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borderArgs = [];
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switch(backgroundClip) {
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case "content-box":
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case "padding-box":
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parseCorner(borderArgs, radius[0], radius[1], borderPoints.topLeftInner, borderPoints.topRightInner, bounds.left + borders[3].width, bounds.top + borders[0].width);
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parseCorner(borderArgs, radius[1], radius[2], borderPoints.topRightInner, borderPoints.bottomRightInner, bounds.left + bounds.width - borders[1].width, bounds.top + borders[0].width);
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parseCorner(borderArgs, radius[2], radius[3], borderPoints.bottomRightInner, borderPoints.bottomLeftInner, bounds.left + bounds.width - borders[1].width, bounds.top + bounds.height - borders[2].width);
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parseCorner(borderArgs, radius[3], radius[0], borderPoints.bottomLeftInner, borderPoints.topLeftInner, bounds.left + borders[3].width, bounds.top + bounds.height - borders[2].width);
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break;
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default:
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parseCorner(borderArgs, radius[0], radius[1], borderPoints.topLeftOuter, borderPoints.topRightOuter, bounds.left, bounds.top);
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parseCorner(borderArgs, radius[1], radius[2], borderPoints.topRightOuter, borderPoints.bottomRightOuter, bounds.left + bounds.width, bounds.top);
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parseCorner(borderArgs, radius[2], radius[3], borderPoints.bottomRightOuter, borderPoints.bottomLeftOuter, bounds.left + bounds.width, bounds.top + bounds.height);
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parseCorner(borderArgs, radius[3], radius[0], borderPoints.bottomLeftOuter, borderPoints.topLeftOuter, bounds.left, bounds.top + bounds.height);
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break;
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}
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return borderArgs;
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};
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function parseCorner(borderArgs, radius1, radius2, corner1, corner2, x, y) {
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if (radius1[0] > 0 || radius1[1] > 0) {
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borderArgs.push(["line", corner1[0].start.x, corner1[0].start.y]);
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corner1[0].curveTo(borderArgs);
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corner1[1].curveTo(borderArgs);
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} else {
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borderArgs.push(["line", x, y]);
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}
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if (radius2[0] > 0 || radius2[1] > 0) {
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borderArgs.push(["line", corner2[0].start.x, corner2[0].start.y]);
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}
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}
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function getBorderRadiusData(container) {
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return ["TopLeft", "TopRight", "BottomRight", "BottomLeft"].map(function(side) {
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var value = container.css('border' + side + 'Radius');
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var arr = value.split(" ");
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if (arr.length <= 1) {
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arr[1] = arr[0];
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}
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return arr.map(asInt);
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});
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}
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function asInt(value) {
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return parseInt(value, 10);
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}
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function getCurvePoints(x, y, r1, r2) {
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var kappa = 4 * ((Math.sqrt(2) - 1) / 3);
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var ox = (r1) * kappa, // control point offset horizontal
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oy = (r2) * kappa, // control point offset vertical
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xm = x + r1, // x-middle
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ym = y + r2; // y-middle
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return {
|
|
topLeft: bezierCurve({x: x, y: ym}, {x: x, y: ym - oy}, {x: xm - ox, y: y}, {x: xm, y: y}),
|
|
topRight: bezierCurve({x: x, y: y}, {x: x + ox,y: y}, {x: xm, y: ym - oy}, {x: xm, y: ym}),
|
|
bottomRight: bezierCurve({x: xm, y: y}, {x: xm, y: y + oy}, {x: x + ox, y: ym}, {x: x, y: ym}),
|
|
bottomLeft: bezierCurve({x: xm, y: ym}, {x: xm - ox, y: ym}, {x: x, y: y + oy}, {x: x, y:y})
|
|
};
|
|
}
|
|
|
|
function calculateCurvePoints(bounds, borderRadius, borders) {
|
|
var x = bounds.left,
|
|
y = bounds.top,
|
|
width = bounds.width,
|
|
height = bounds.height,
|
|
|
|
tlh = borderRadius[0][0],
|
|
tlv = borderRadius[0][1],
|
|
trh = borderRadius[1][0],
|
|
trv = borderRadius[1][1],
|
|
brh = borderRadius[2][0],
|
|
brv = borderRadius[2][1],
|
|
blh = borderRadius[3][0],
|
|
blv = borderRadius[3][1];
|
|
|
|
var topWidth = width - trh,
|
|
rightHeight = height - brv,
|
|
bottomWidth = width - brh,
|
|
leftHeight = height - blv;
|
|
|
|
return {
|
|
topLeftOuter: getCurvePoints(x, y, tlh, tlv).topLeft.subdivide(0.5),
|
|
topLeftInner: getCurvePoints(x + borders[3].width, y + borders[0].width, Math.max(0, tlh - borders[3].width), Math.max(0, tlv - borders[0].width)).topLeft.subdivide(0.5),
|
|
topRightOuter: getCurvePoints(x + topWidth, y, trh, trv).topRight.subdivide(0.5),
|
|
topRightInner: getCurvePoints(x + Math.min(topWidth, width + borders[3].width), y + borders[0].width, (topWidth > width + borders[3].width) ? 0 :trh - borders[3].width, trv - borders[0].width).topRight.subdivide(0.5),
|
|
bottomRightOuter: getCurvePoints(x + bottomWidth, y + rightHeight, brh, brv).bottomRight.subdivide(0.5),
|
|
bottomRightInner: getCurvePoints(x + Math.min(bottomWidth, width + borders[3].width), y + Math.min(rightHeight, height + borders[0].width), Math.max(0, brh - borders[1].width), Math.max(0, brv - borders[2].width)).bottomRight.subdivide(0.5),
|
|
bottomLeftOuter: getCurvePoints(x, y + leftHeight, blh, blv).bottomLeft.subdivide(0.5),
|
|
bottomLeftInner: getCurvePoints(x + borders[3].width, y + leftHeight, Math.max(0, blh - borders[3].width), Math.max(0, blv - borders[2].width)).bottomLeft.subdivide(0.5)
|
|
};
|
|
}
|
|
|
|
function bezierCurve(start, startControl, endControl, end) {
|
|
var lerp = function (a, b, t) {
|
|
return {
|
|
x: a.x + (b.x - a.x) * t,
|
|
y: a.y + (b.y - a.y) * t
|
|
};
|
|
};
|
|
|
|
return {
|
|
start: start,
|
|
startControl: startControl,
|
|
endControl: endControl,
|
|
end: end,
|
|
subdivide: function(t) {
|
|
var ab = lerp(start, startControl, t),
|
|
bc = lerp(startControl, endControl, t),
|
|
cd = lerp(endControl, end, t),
|
|
abbc = lerp(ab, bc, t),
|
|
bccd = lerp(bc, cd, t),
|
|
dest = lerp(abbc, bccd, t);
|
|
return [bezierCurve(start, ab, abbc, dest), bezierCurve(dest, bccd, cd, end)];
|
|
},
|
|
curveTo: function(borderArgs) {
|
|
borderArgs.push(["bezierCurve", startControl.x, startControl.y, endControl.x, endControl.y, end.x, end.y]);
|
|
},
|
|
curveToReversed: function(borderArgs) {
|
|
borderArgs.push(["bezierCurve", endControl.x, endControl.y, startControl.x, startControl.y, start.x, start.y]);
|
|
}
|
|
};
|
|
}
|
|
|
|
function drawSide(borderData, radius1, radius2, outer1, inner1, outer2, inner2) {
|
|
var borderArgs = [];
|
|
|
|
if (radius1[0] > 0 || radius1[1] > 0) {
|
|
borderArgs.push(["line", outer1[1].start.x, outer1[1].start.y]);
|
|
outer1[1].curveTo(borderArgs);
|
|
} else {
|
|
borderArgs.push([ "line", borderData.c1[0], borderData.c1[1]]);
|
|
}
|
|
|
|
if (radius2[0] > 0 || radius2[1] > 0) {
|
|
borderArgs.push(["line", outer2[0].start.x, outer2[0].start.y]);
|
|
outer2[0].curveTo(borderArgs);
|
|
borderArgs.push(["line", inner2[0].end.x, inner2[0].end.y]);
|
|
inner2[0].curveToReversed(borderArgs);
|
|
} else {
|
|
borderArgs.push(["line", borderData.c2[0], borderData.c2[1]]);
|
|
borderArgs.push(["line", borderData.c3[0], borderData.c3[1]]);
|
|
}
|
|
|
|
if (radius1[0] > 0 || radius1[1] > 0) {
|
|
borderArgs.push(["line", inner1[1].end.x, inner1[1].end.y]);
|
|
inner1[1].curveToReversed(borderArgs);
|
|
} else {
|
|
borderArgs.push(["line", borderData.c4[0], borderData.c4[1]]);
|
|
}
|
|
|
|
return borderArgs;
|
|
}
|
|
|
|
|
|
function nonIgnoredElement(nodeContainer) {
|
|
return (nodeContainer.node.nodeType !== Node.ELEMENT_NODE || ["SCRIPT", "HEAD", "TITLE", "OBJECT", "BR"].indexOf(nodeContainer.node.nodeName) === -1);
|
|
}
|
|
|
|
function flatten(arrays) {
|
|
return [].concat.apply([], arrays);
|
|
}
|
|
|
|
function renderableNode(node) {
|
|
return (node.nodeType === Node.TEXT_NODE || node.nodeType === Node.ELEMENT_NODE);
|
|
}
|
|
|
|
function isPositionedForStacking(container) {
|
|
var position = container.css("position");
|
|
var zIndex = (position === "absolute" || position === "relative") ? container.css("zIndex") : "auto";
|
|
return zIndex !== "auto";
|
|
}
|
|
|
|
function isPositioned(container) {
|
|
return container.css("position") !== "static";
|
|
}
|
|
|
|
function isFloating(container) {
|
|
return container.css("float") !== "none";
|
|
}
|
|
|
|
function not(callback) {
|
|
var context = this;
|
|
return function() {
|
|
return !callback.apply(context, arguments);
|
|
};
|
|
}
|
|
|
|
function isElement(container) {
|
|
return container.node.nodeType === Node.ELEMENT_NODE;
|
|
}
|
|
|
|
function isTextNode(container) {
|
|
return container.node.nodeType === Node.TEXT_NODE;
|
|
}
|
|
|
|
function zIndexSort(a, b) {
|
|
return a.cssInt("zIndex") - b.cssInt("zIndex");
|
|
}
|
|
|
|
function hasOpacity(container) {
|
|
return container.css("opacity") < 1;
|
|
}
|
|
|
|
function bind(callback, context) {
|
|
return function() {
|
|
return callback.apply(context, arguments);
|
|
};
|
|
}
|
|
|
|
function ImageContainer(src, cors) {
|
|
this.src = src;
|
|
this.image = new Image();
|
|
var image = this.image;
|
|
this.promise = new Promise(function(resolve, reject) {
|
|
image.onload = resolve;
|
|
image.onerror = reject;
|
|
if (cors) {
|
|
image.crossOrigin = "anonymous";
|
|
}
|
|
image.src = src;
|
|
});
|
|
}
|
|
|
|
function ImageLoader(options, support) {
|
|
this.link = null;
|
|
this.options = options;
|
|
this.support = support;
|
|
this.origin = window.location.protocol + window.location.host;
|
|
}
|
|
|
|
ImageLoader.prototype.findImages = function(nodes) {
|
|
var images = [];
|
|
nodes.filter(isImage).map(src).forEach(this.addImage(images, this.loadImage), this);
|
|
return images;
|
|
};
|
|
|
|
ImageLoader.prototype.findBackgroundImage = function(images, container) {
|
|
container.parseBackgroundImages().filter(this.isImageBackground).map(this.getBackgroundUrl).forEach(this.addImage(images, this.loadImage), this);
|
|
return images;
|
|
};
|
|
|
|
ImageLoader.prototype.addImage = function(images, callback) {
|
|
return function(newImage) {
|
|
if (!this.imageExists(images, newImage)) {
|
|
images.splice(0, 0, callback.apply(this, arguments));
|
|
}
|
|
};
|
|
};
|
|
|
|
ImageLoader.prototype.getBackgroundUrl = function(imageData) {
|
|
return imageData.args[0];
|
|
};
|
|
|
|
ImageLoader.prototype.isImageBackground = function(imageData) {
|
|
return imageData.method === "url";
|
|
};
|
|
|
|
ImageLoader.prototype.loadImage = function(src) {
|
|
if (src.match(/data:image\/.*;base64,/i)) {
|
|
return new ImageContainer(src.replace(/url\(['"]{0,}|['"]{0,}\)$/ig, ''), false);
|
|
} else if (this.isSameOrigin(src) || this.options.allowTaint === true) {
|
|
return new ImageContainer(src, false);
|
|
} else if (this.support.cors && !this.options.allowTaint && this.options.useCORS) {
|
|
return new ImageContainer(src, true);
|
|
} else if (this.options.proxy) {
|
|
return new ProxyImageContainer(src);
|
|
} else {
|
|
return new DummyImageContainer(src);
|
|
}
|
|
};
|
|
|
|
ImageLoader.prototype.imageExists = function(images, src) {
|
|
return images.some(function(image) {
|
|
return image.src === src;
|
|
});
|
|
};
|
|
|
|
ImageLoader.prototype.isSameOrigin = function(url) {
|
|
var link = this.link || (this.link = document.createElement("a"));
|
|
link.href = url;
|
|
link.href = link.href; // IE9, LOL! - http://jsfiddle.net/niklasvh/2e48b/
|
|
var origin = link.protocol + link.host;
|
|
return (origin === this.origin);
|
|
};
|
|
|
|
ImageLoader.prototype.getPromise = function(container) {
|
|
return container.promise;
|
|
};
|
|
|
|
ImageLoader.prototype.get = function(src) {
|
|
var found = null;
|
|
return this.images.some(function(img) {
|
|
return (found = img).src === src;
|
|
}) ? found : null;
|
|
};
|
|
|
|
ImageLoader.prototype.fetch = function(nodes) {
|
|
this.images = nodes.reduce(bind(this.findBackgroundImage, this), this.findImages(nodes));
|
|
this.ready = Promise.all(this.images.map(this.getPromise));
|
|
return this;
|
|
};
|
|
|
|
function isImage(container) {
|
|
return container.node.nodeName === "IMG";
|
|
}
|
|
|
|
function src(container) {
|
|
return container.node.src;
|
|
}
|
|
|
|
function log() {
|
|
if (window.html2canvas.logging && window.console && window.console.log) {
|
|
window.console.log.apply(window.console, [(Date.now() - window.html2canvas.start) + "ms", "html2canvas:"].concat([].slice.call(arguments, 0)));
|
|
}
|
|
}
|
|
|
|
function NodeContainer(node, parent) {
|
|
this.node = node;
|
|
this.parent = parent;
|
|
this.stack = null;
|
|
this.bounds = null;
|
|
this.visible = null;
|
|
this.computedStyles = null;
|
|
this.styles = {};
|
|
this.backgroundImages = null;
|
|
}
|
|
|
|
NodeContainer.prototype.assignStack = function(stack) {
|
|
this.stack = stack;
|
|
stack.children.push(this);
|
|
};
|
|
|
|
NodeContainer.prototype.isElementVisible = function() {
|
|
return this.node.nodeType === Node.TEXT_NODE ? this.parent.visible : (this.css('display') !== "none" && this.css('visibility') !== "hidden" && !this.node.hasAttribute("data-html2canvas-ignore"));
|
|
};
|
|
|
|
NodeContainer.prototype.css = function(attribute) {
|
|
if (!this.computedStyles) {
|
|
this.computedStyles = this.node.ownerDocument.defaultView.getComputedStyle(this.node, null);
|
|
}
|
|
|
|
return this.styles[attribute] || (this.styles[attribute] = this.computedStyles[attribute]);
|
|
};
|
|
|
|
NodeContainer.prototype.cssInt = function(attribute) {
|
|
var value = parseInt(this.css(attribute), 10);
|
|
return (Number.isNaN(value)) ? 0 : value; // borders in old IE are throwing 'medium' for demo.html
|
|
};
|
|
|
|
NodeContainer.prototype.cssFloat = function(attribute) {
|
|
var value = parseFloat(this.css(attribute));
|
|
return (Number.isNaN(value)) ? 0 : value;
|
|
};
|
|
|
|
NodeContainer.prototype.fontWeight = function() {
|
|
var weight = this.css("fontWeight");
|
|
switch(parseInt(weight, 10)){
|
|
case 401:
|
|
weight = "bold";
|
|
break;
|
|
case 400:
|
|
weight = "normal";
|
|
break;
|
|
}
|
|
return weight;
|
|
};
|
|
|
|
NodeContainer.prototype.parseBackgroundImages = function() {
|
|
var whitespace = ' \r\n\t',
|
|
method, definition, prefix, prefix_i, block, results = [],
|
|
mode = 0, numParen = 0, quote, args;
|
|
var appendResult = function() {
|
|
if(method) {
|
|
if (definition.substr(0, 1) === '"') {
|
|
definition = definition.substr(1, definition.length - 2);
|
|
}
|
|
if (definition) {
|
|
args.push(definition);
|
|
}
|
|
if (method.substr(0, 1) === '-' && (prefix_i = method.indexOf('-', 1 ) + 1) > 0) {
|
|
prefix = method.substr(0, prefix_i);
|
|
method = method.substr(prefix_i);
|
|
}
|
|
results.push({
|
|
prefix: prefix,
|
|
method: method.toLowerCase(),
|
|
value: block,
|
|
args: args,
|
|
image: null
|
|
});
|
|
}
|
|
args = [];
|
|
method = prefix = definition = block = '';
|
|
};
|
|
args = [];
|
|
method = prefix = definition = block = '';
|
|
this.css("backgroundImage").split("").forEach(function(c) {
|
|
if (mode === 0 && whitespace.indexOf(c) > -1) {
|
|
return;
|
|
}
|
|
switch(c) {
|
|
case '"':
|
|
if(!quote) {
|
|
quote = c;
|
|
}
|
|
else if(quote === c) {
|
|
quote = null;
|
|
}
|
|
break;
|
|
case '(':
|
|
if(quote) {
|
|
break;
|
|
} else if(mode === 0) {
|
|
mode = 1;
|
|
block += c;
|
|
return;
|
|
} else {
|
|
numParen++;
|
|
}
|
|
break;
|
|
case ')':
|
|
if (quote) {
|
|
break;
|
|
} else if(mode === 1) {
|
|
if(numParen === 0) {
|
|
mode = 0;
|
|
block += c;
|
|
appendResult();
|
|
return;
|
|
} else {
|
|
numParen--;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ',':
|
|
if (quote) {
|
|
break;
|
|
} else if(mode === 0) {
|
|
appendResult();
|
|
return;
|
|
} else if (mode === 1) {
|
|
if (numParen === 0 && !method.match(/^url$/i)) {
|
|
args.push(definition);
|
|
definition = '';
|
|
block += c;
|
|
return;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
block += c;
|
|
if (mode === 0) {
|
|
method += c;
|
|
} else {
|
|
definition += c;
|
|
}
|
|
});
|
|
|
|
appendResult();
|
|
|
|
return this.backgroundImages || (this.backgroundImages = results);
|
|
};
|
|
|
|
NodeContainer.prototype.cssList = function(property, index) {
|
|
var value = (this.css(property) || '').split(',');
|
|
value = value[index || 0] || value[0] || 'auto';
|
|
value = value.trim().split(' ');
|
|
if (value.length === 1) {
|
|
value = [value[0], value[0]];
|
|
}
|
|
return value;
|
|
};
|
|
|
|
NodeContainer.prototype.parseBackgroundSize = function(bounds, image, index) {
|
|
var size = this.cssList("backgroundSize", index);
|
|
var width, height;
|
|
|
|
if (isPercentage(size[0])) {
|
|
width = bounds.width * parseFloat(size[0]) / 100;
|
|
} else if (/contain|cover/.test(size[0])) {
|
|
var targetRatio = bounds.width / bounds.height, currentRatio = image.width / image.height;
|
|
return (targetRatio < currentRatio ^ size[0] === 'contain') ? {width: bounds.height * currentRatio, height: bounds.height} : {width: bounds.width, height: bounds.width / currentRatio};
|
|
} else {
|
|
width = parseInt(size[0], 10);
|
|
}
|
|
|
|
if (size[0] === 'auto' && size[1] === 'auto') {
|
|
height = image.height;
|
|
} else if (size[1] === 'auto') {
|
|
height = width / image.width * image.height;
|
|
} else if (isPercentage(size[1])) {
|
|
height = bounds.height * parseFloat(size[1]) / 100;
|
|
} else {
|
|
height = parseInt(size[1], 10);
|
|
}
|
|
|
|
if (size[0] === 'auto') {
|
|
width = height / image.height * image.width;
|
|
}
|
|
|
|
return {width: width, height: height};
|
|
};
|
|
|
|
NodeContainer.prototype.parseBackgroundPosition = function(bounds, image, index, backgroundSize) {
|
|
var position = this.cssList('backgroundPosition', index);
|
|
var left, top;
|
|
|
|
if (isPercentage(position[0])){
|
|
left = (bounds.width - (backgroundSize || image).width) * (parseFloat(position[0]) / 100);
|
|
} else {
|
|
left = parseInt(position[0], 10);
|
|
}
|
|
|
|
if (position[1] === 'auto') {
|
|
top = left / image.width * image.height;
|
|
} else if (isPercentage(position[1])){
|
|
top = (bounds.height - (backgroundSize || image).height) * parseFloat(position[1]) / 100;
|
|
} else {
|
|
top = parseInt(position[1], 10);
|
|
}
|
|
|
|
if (position[0] === 'auto') {
|
|
left = top / image.height * image.width;
|
|
}
|
|
|
|
return {left: left, top: top};
|
|
};
|
|
|
|
NodeContainer.prototype.parseBackgroundRepeat = function(index) {
|
|
return this.cssList("backgroundRepeat", index)[0];
|
|
};
|
|
|
|
function isPercentage(value) {
|
|
return value.toString().indexOf("%") !== -1;
|
|
}
|
|
|
|
/*
|
|
Copyright (c) 2013 Yehuda Katz, Tom Dale, and contributors
|
|
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy of
|
|
this software and associated documentation files (the "Software"), to deal in
|
|
the Software without restriction, including without limitation the rights to
|
|
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
|
|
of the Software, and to permit persons to whom the Software is furnished to do
|
|
so, subject to the following conditions:
|
|
|
|
The above copyright notice and this permission notice shall be included in all
|
|
copies or substantial portions of the Software.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
SOFTWARE.
|
|
*/
|
|
!function(){var a,b,c,d;!function(){var e={},f={};a=function(a,b,c){e[a]={deps:b,callback:c}},d=c=b=function(a){function c(b){if("."!==b.charAt(0))return b;for(var c=b.split("/"),d=a.split("/").slice(0,-1),e=0,f=c.length;f>e;e++){var g=c[e];if(".."===g)d.pop();else{if("."===g)continue;d.push(g)}}return d.join("/")}if(d._eak_seen=e,f[a])return f[a];if(f[a]={},!e[a])throw new Error("Could not find module "+a);for(var g,h=e[a],i=h.deps,j=h.callback,k=[],l=0,m=i.length;m>l;l++)"exports"===i[l]?k.push(g={}):k.push(b(c(i[l])));var n=j.apply(this,k);return f[a]=g||n}}(),a("promise/all",["./utils","exports"],function(a,b){"use strict";function c(a){var b=this;if(!d(a))throw new TypeError("You must pass an array to all.");return new b(function(b,c){function d(a){return function(b){f(a,b)}}function f(a,c){h[a]=c,0===--i&&b(h)}var g,h=[],i=a.length;0===i&&b([]);for(var j=0;j<a.length;j++)g=a[j],g&&e(g.then)?g.then(d(j),c):f(j,g)})}var d=a.isArray,e=a.isFunction;b.all=c}),a("promise/asap",["exports"],function(a){"use strict";function b(){return function(){process.nextTick(e)}}function c(){var a=0,b=new i(e),c=document.createTextNode("");return b.observe(c,{characterData:!0}),function(){c.data=a=++a%2}}function d(){return function(){j.setTimeout(e,1)}}function e(){for(var a=0;a<k.length;a++){var b=k[a],c=b[0],d=b[1];c(d)}k=[]}function f(a,b){var c=k.push([a,b]);1===c&&g()}var g,h="undefined"!=typeof window?window:{},i=h.MutationObserver||h.WebKitMutationObserver,j="undefined"!=typeof global?global:this,k=[];g="undefined"!=typeof process&&"[object process]"==={}.toString.call(process)?b():i?c():d(),a.asap=f}),a("promise/cast",["exports"],function(a){"use strict";function b(a){if(a&&"object"==typeof a&&a.constructor===this)return a;var b=this;return new b(function(b){b(a)})}a.cast=b}),a("promise/config",["exports"],function(a){"use strict";function b(a,b){return 2!==arguments.length?c[a]:(c[a]=b,void 0)}var c={instrument:!1};a.config=c,a.configure=b}),a("promise/polyfill",["./promise","./utils","exports"],function(a,b,c){"use strict";function d(){var a="Promise"in window&&"cast"in window.Promise&&"resolve"in window.Promise&&"reject"in window.Promise&&"all"in window.Promise&&"race"in window.Promise&&function(){var a;return new window.Promise(function(b){a=b}),f(a)}();a||(window.Promise=e)}var e=a.Promise,f=b.isFunction;c.polyfill=d}),a("promise/promise",["./config","./utils","./cast","./all","./race","./resolve","./reject","./asap","exports"],function(a,b,c,d,e,f,g,h,i){"use strict";function j(a){if(!w(a))throw new TypeError("You must pass a resolver function as the first argument to the promise constructor");if(!(this instanceof j))throw new TypeError("Failed to construct 'Promise': Please use the 'new' operator, this object constructor cannot be called as a function.");this._subscribers=[],k(a,this)}function k(a,b){function c(a){p(b,a)}function d(a){r(b,a)}try{a(c,d)}catch(e){d(e)}}function l(a,b,c,d){var e,f,g,h,i=w(c);if(i)try{e=c(d),g=!0}catch(j){h=!0,f=j}else e=d,g=!0;o(b,e)||(i&&g?p(b,e):h?r(b,f):a===F?p(b,e):a===G&&r(b,e))}function m(a,b,c,d){var e=a._subscribers,f=e.length;e[f]=b,e[f+F]=c,e[f+G]=d}function n(a,b){for(var c,d,e=a._subscribers,f=a._detail,g=0;g<e.length;g+=3)c=e[g],d=e[g+b],l(b,c,d,f);a._subscribers=null}function o(a,b){var c,d=null;try{if(a===b)throw new TypeError("A promises callback cannot return that same promise.");if(v(b)&&(d=b.then,w(d)))return d.call(b,function(d){return c?!0:(c=!0,b!==d?p(a,d):q(a,d),void 0)},function(b){return c?!0:(c=!0,r(a,b),void 0)}),!0}catch(e){return c?!0:(r(a,e),!0)}return!1}function p(a,b){a===b?q(a,b):o(a,b)||q(a,b)}function q(a,b){a._state===D&&(a._state=E,a._detail=b,u.async(s,a))}function r(a,b){a._state===D&&(a._state=E,a._detail=b,u.async(t,a))}function s(a){n(a,a._state=F)}function t(a){n(a,a._state=G)}var u=a.config,v=(a.configure,b.objectOrFunction),w=b.isFunction,x=(b.now,c.cast),y=d.all,z=e.race,A=f.resolve,B=g.reject,C=h.asap;u.async=C;var D=void 0,E=0,F=1,G=2;j.prototype={constructor:j,_state:void 0,_detail:void 0,_subscribers:void 0,then:function(a,b){var c=this,d=new this.constructor(function(){});if(this._state){var e=arguments;u.async(function(){l(c._state,d,e[c._state-1],c._detail)})}else m(this,d,a,b);return d},"catch":function(a){return this.then(null,a)}},j.all=y,j.cast=x,j.race=z,j.resolve=A,j.reject=B,i.Promise=j}),a("promise/race",["./utils","exports"],function(a,b){"use strict";function c(a){var b=this;if(!d(a))throw new TypeError("You must pass an array to race.");return new b(function(b,c){for(var d,e=0;e<a.length;e++)d=a[e],d&&"function"==typeof d.then?d.then(b,c):b(d)})}var d=a.isArray;b.race=c}),a("promise/reject",["exports"],function(a){"use strict";function b(a){var b=this;return new b(function(b,c){c(a)})}a.reject=b}),a("promise/resolve",["exports"],function(a){"use strict";function b(a){var b=this;return new b(function(b){b(a)})}a.resolve=b}),a("promise/utils",["exports"],function(a){"use strict";function b(a){return c(a)||"object"==typeof a&&null!==a}function c(a){return"function"==typeof a}function d(a){return"[object Array]"===Object.prototype.toString.call(a)}var e=Date.now||function(){return(new Date).getTime()};a.objectOrFunction=b,a.isFunction=c,a.isArray=d,a.now=e}),b("promise/polyfill").polyfill()}();
|
|
|
|
function Renderer(width, height, images) {
|
|
this.width = width;
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|
this.height = height;
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|
this.images = images;
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|
}
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Renderer.prototype.renderImage = function(container, bounds, borderData, image) {
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var paddingLeft = container.cssInt('paddingLeft'),
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|
paddingTop = container.cssInt('paddingTop'),
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|
paddingRight = container.cssInt('paddingRight'),
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|
paddingBottom = container.cssInt('paddingBottom'),
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|
borders = borderData.borders;
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|
|
|
this.drawImage(
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|
image,
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0,
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|
0,
|
|
image.width,
|
|
image.height,
|
|
bounds.left + paddingLeft + borders[3].width,
|
|
bounds.top + paddingTop + borders[0].width,
|
|
bounds.width - (borders[1].width + borders[3].width + paddingLeft + paddingRight),
|
|
bounds.height - (borders[0].width + borders[2].width + paddingTop + paddingBottom)
|
|
);
|
|
};
|
|
|
|
Renderer.prototype.renderBackground = function(container, bounds) {
|
|
if (bounds.height > 0 && bounds.width > 0) {
|
|
this.renderBackgroundColor(container, bounds);
|
|
this.renderBackgroundImage(container, bounds);
|
|
}
|
|
};
|
|
|
|
Renderer.prototype.renderBackgroundColor = function(container, bounds) {
|
|
var color = container.css("backgroundColor");
|
|
if (!this.isTransparent(color)) {
|
|
this.rectangle(bounds.left, bounds.top, bounds.width, bounds.height, container.css("backgroundColor"));
|
|
}
|
|
};
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|
|
|
Renderer.prototype.renderBorders = function(borders) {
|
|
borders.forEach(this.renderBorder, this);
|
|
};
|
|
|
|
Renderer.prototype.renderBorder = function(data) {
|
|
if (!this.isTransparent(data.color) && data.args !== null) {
|
|
this.drawShape(data.args, data.color);
|
|
}
|
|
};
|
|
|
|
Renderer.prototype.renderBackgroundImage = function(container, bounds) {
|
|
var backgroundImages = container.parseBackgroundImages();
|
|
backgroundImages.reverse().forEach(function(backgroundImage, index, arr) {
|
|
if (backgroundImage.method === "url") {
|
|
var image = this.images.get(backgroundImage.args[0]);
|
|
if (image) {
|
|
this.renderBackgroundRepeating(container, bounds, image, arr.length - (index+1));
|
|
} else {
|
|
log("Error loading background-image", backgroundImage.args[0]);
|
|
}
|
|
}
|
|
}, this);
|
|
};
|
|
|
|
Renderer.prototype.renderBackgroundRepeating = function(container, bounds, imageContainer, index) {
|
|
var size = container.parseBackgroundSize(bounds, imageContainer.image, index);
|
|
var position = container.parseBackgroundPosition(bounds, imageContainer.image, index, size);
|
|
var repeat = container.parseBackgroundRepeat(index);
|
|
// image = resizeImage(image, backgroundSize);
|
|
switch (repeat) {
|
|
case "repeat-x":
|
|
case "repeat no-repeat":
|
|
this.backgroundRepeatShape(imageContainer, position, size, bounds, bounds.left, bounds.top + position.top, 99999, imageContainer.image.height);
|
|
break;
|
|
case "repeat-y":
|
|
case "no-repeat repeat":
|
|
this.backgroundRepeatShape(imageContainer, position, size, bounds, bounds.left + position.left, bounds.top, imageContainer.image.width, 99999);
|
|
break;
|
|
case "no-repeat":
|
|
this.backgroundRepeatShape(imageContainer, position, size, bounds, bounds.left + position.left, bounds.top + position.top, imageContainer.image.width, imageContainer.image.height);
|
|
break;
|
|
default:
|
|
this.renderBackgroundRepeat(imageContainer, position, size, {top: bounds.top, left: bounds.left});
|
|
break;
|
|
}
|
|
};
|
|
|
|
Renderer.prototype.isTransparent = function(color) {
|
|
return (!color || color === "transparent" || color === "rgba(0, 0, 0, 0)");
|
|
};
|
|
|
|
function CanvasRenderer(width, height) {
|
|
Renderer.apply(this, arguments);
|
|
this.canvas = document.createElement("canvas");
|
|
this.canvas.width = width;
|
|
this.canvas.height = height;
|
|
this.ctx = this.canvas.getContext("2d");
|
|
this.ctx.textBaseline = "bottom";
|
|
}
|
|
|
|
CanvasRenderer.prototype = Object.create(Renderer.prototype);
|
|
|
|
CanvasRenderer.prototype.setFillStyle = function(color) {
|
|
this.ctx.fillStyle = color;
|
|
return this.ctx;
|
|
};
|
|
|
|
CanvasRenderer.prototype.rectangle = function(left, top, width, height, color) {
|
|
this.setFillStyle(color).fillRect(left, top, width, height);
|
|
};
|
|
|
|
CanvasRenderer.prototype.drawShape = function(shape, color) {
|
|
this.shape(shape);
|
|
this.setFillStyle(color).fill();
|
|
};
|
|
|
|
CanvasRenderer.prototype.drawImage = function(image, sx, sy, sw, sh, dx, dy, dw, dh) {
|
|
this.ctx.drawImage(image, sx, sy, sw, sh, dx, dy, dw, dh);
|
|
};
|
|
|
|
CanvasRenderer.prototype.clip = function(shape, callback, context) {
|
|
this.ctx.save();
|
|
this.shape(shape).clip();
|
|
callback.call(context);
|
|
this.ctx.restore();
|
|
};
|
|
|
|
CanvasRenderer.prototype.shape = function(shape) {
|
|
this.ctx.beginPath();
|
|
shape.forEach(function(point, index) {
|
|
this.ctx[(index === 0) ? "moveTo" : point[0] + "To" ].apply(this.ctx, point.slice(1));
|
|
}, this);
|
|
this.ctx.closePath();
|
|
return this.ctx;
|
|
};
|
|
|
|
CanvasRenderer.prototype.font = function(color, style, variant, weight, size, family) {
|
|
this.setFillStyle(color).font = [style, variant, weight, size, family].join(" ");
|
|
};
|
|
|
|
CanvasRenderer.prototype.setOpacity = function(opacity) {
|
|
this.ctx.globalAlpha = opacity;
|
|
};
|
|
|
|
CanvasRenderer.prototype.text = function(text, left, bottom) {
|
|
this.ctx.fillText(text, left, bottom);
|
|
};
|
|
|
|
CanvasRenderer.prototype.backgroundRepeatShape = function(imageContainer, backgroundPosition, size, bounds, left, top, width, height) {
|
|
var shape = [
|
|
["line", Math.round(left), Math.round(top)],
|
|
["line", Math.round(left + width), Math.round(top)],
|
|
["line", Math.round(left + width), Math.round(height + top)],
|
|
["line", Math.round(left), Math.round(height + top)]
|
|
];
|
|
this.clip(shape, function() {
|
|
this.renderBackgroundRepeat(imageContainer, backgroundPosition, size, bounds);
|
|
}, this);
|
|
};
|
|
|
|
CanvasRenderer.prototype.renderBackgroundRepeat = function(imageContainer, backgroundPosition, size, bounds) {
|
|
var offsetX = Math.round(bounds.left + backgroundPosition.left), offsetY = Math.round(bounds.top + backgroundPosition.top);
|
|
this.setFillStyle(this.ctx.createPattern(this.resizeImage(imageContainer, size), "repeat"));
|
|
this.ctx.translate(offsetX, offsetY);
|
|
this.ctx.fill();
|
|
this.ctx.translate(-offsetX, -offsetY);
|
|
};
|
|
|
|
CanvasRenderer.prototype.resizeImage = function(imageContainer, size) {
|
|
var image = imageContainer.image;
|
|
if(image.width === size.width && image.height === size.height) {
|
|
return image;
|
|
}
|
|
|
|
var ctx, canvas = document.createElement('canvas');
|
|
canvas.width = size.width;
|
|
canvas.height = size.height;
|
|
ctx = canvas.getContext("2d");
|
|
ctx.drawImage(image, 0, 0, image.width, image.height, 0, 0, size.width, size.height );
|
|
return canvas;
|
|
};
|
|
|
|
function StackingContext(hasOwnStacking, opacity, element, parent) {
|
|
NodeContainer.call(this, element, parent);
|
|
this.ownStacking = hasOwnStacking;
|
|
this.contexts = [];
|
|
this.children = [];
|
|
this.opacity = (this.parent ? this.parent.stack.opacity : 1) * opacity;
|
|
}
|
|
|
|
StackingContext.prototype = Object.create(NodeContainer.prototype);
|
|
|
|
StackingContext.prototype.getParentStack = function(context) {
|
|
var parentStack = (this.parent) ? this.parent.stack : null;
|
|
return parentStack ? (parentStack.ownStacking ? parentStack : parentStack.getParentStack(context)) : context.stack;
|
|
};
|
|
|
|
function Support() {
|
|
this.rangeBounds = this.testRangeBounds();
|
|
this.cors = this.testCORS();
|
|
}
|
|
|
|
Support.prototype.testRangeBounds = function() {
|
|
var range, testElement, rangeBounds, rangeHeight, support = false;
|
|
|
|
if (document.createRange) {
|
|
range = document.createRange();
|
|
if (range.getBoundingClientRect) {
|
|
testElement = document.createElement('boundtest');
|
|
testElement.style.height = "123px";
|
|
testElement.style.display = "block";
|
|
document.body.appendChild(testElement);
|
|
|
|
range.selectNode(testElement);
|
|
rangeBounds = range.getBoundingClientRect();
|
|
rangeHeight = rangeBounds.height;
|
|
|
|
if (rangeHeight === 123) {
|
|
support = true;
|
|
}
|
|
document.body.removeChild(testElement);
|
|
}
|
|
}
|
|
|
|
return support;
|
|
};
|
|
|
|
Support.prototype.testCORS = function() {
|
|
return typeof((new Image()).crossOrigin) !== "undefined";
|
|
};
|
|
|
|
function TextContainer(node, parent) {
|
|
NodeContainer.call(this, node, parent);
|
|
}
|
|
|
|
TextContainer.prototype = Object.create(NodeContainer.prototype);
|
|
|
|
TextContainer.prototype.applyTextTransform = function() {
|
|
this.node.data = this.transform(this.parent.css("textTransform"));
|
|
};
|
|
|
|
TextContainer.prototype.transform = function(transform) {
|
|
var text = this.node.data;
|
|
switch(transform){
|
|
case "lowercase":
|
|
return text.toLowerCase();
|
|
case "capitalize":
|
|
return text.replace(/(^|\s|:|-|\(|\))([a-z])/g, capitalize);
|
|
case "uppercase":
|
|
return text.toUpperCase();
|
|
default:
|
|
return text;
|
|
}
|
|
};
|
|
|
|
function capitalize(m, p1, p2) {
|
|
if (m.length > 0) {
|
|
return p1 + p2.toUpperCase();
|
|
}
|
|
}
|
|
|
|
})(window,document); |