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png image export feature added, various technical fixes and improvements
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| Original file line number | Diff line number | Diff line change |
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@@ -43,4 +43,6 @@ CacheUMLExplorer.prototype.init = function () { | |
| } | ||
| } | ||
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| enableSVGDownload(this.classTree); | ||
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| }; | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| /* | ||
| * @see https://github.com/NYTimes/svg-crowbar - A bit of used code from here, thanks to it's author. | ||
| */ | ||
| var enableSVGDownload = function (classView) { | ||
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| var doctype = '<?xml version="1.0" standalone="no"?><!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">'; | ||
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| window.URL = (window.URL || window.webkitURL); | ||
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| var prefix = { | ||
| xmlns: "http://www.w3.org/2000/xmlns/", | ||
| xlink: "http://www.w3.org/1999/xlink", | ||
| svg: "http://www.w3.org/2000/svg" | ||
| }; | ||
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| function getSources(doc, emptySvgDeclarationComputed) { | ||
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| var svgInfo = [], | ||
| svgs = doc.querySelectorAll("svg"); | ||
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| [].forEach.call(svgs, function (svg) { | ||
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| var par = svg.parentNode; | ||
| svg = svg.cloneNode(true); | ||
| par.appendChild(svg); | ||
| var gGroup = svg.childNodes[0]; | ||
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| svg.setAttribute("version", "1.1"); | ||
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| // removing attributes so they aren't doubled up | ||
| svg.removeAttribute("xmlns"); | ||
| svg.removeAttribute("xlink"); | ||
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| // These are needed for the svg | ||
| if (!svg.hasAttributeNS(prefix.xmlns, "xmlns")) { | ||
| svg.setAttributeNS(prefix.xmlns, "xmlns", prefix.svg); | ||
| } | ||
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| if (!svg.hasAttributeNS(prefix.xmlns, "xmlns:xlink")) { | ||
| svg.setAttributeNS(prefix.xmlns, "xmlns:xlink", prefix.xlink); | ||
| } | ||
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| svg.setAttribute("width", gGroup.getBBox().width); | ||
| svg.setAttribute("height", gGroup.getBBox().height); | ||
| gGroup.setAttribute("transform", ""); | ||
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| setInlineStyles(svg, emptySvgDeclarationComputed); | ||
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| var source = (new XMLSerializer()).serializeToString(svg); | ||
| var rect = svg.getBoundingClientRect(); | ||
| svgInfo.push({ | ||
| top: rect.top, | ||
| left: rect.left, | ||
| width: rect.width, | ||
| height: rect.height, | ||
| class: svg.getAttribute("class"), | ||
| id: svg.getAttribute("id"), | ||
| childElementCount: svg.childElementCount, | ||
| source: [doctype + source] | ||
| }); | ||
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| par.removeChild(svg); | ||
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| }); | ||
| return svgInfo; | ||
| } | ||
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| document.getElementById("button.downloadSVG").addEventListener("click", function () { | ||
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| var emptySvg = window.document.createElementNS(prefix.svg, 'svg'), | ||
| emptySvgDeclarationComputed = getComputedStyle(emptySvg), | ||
| source = getSources(document, emptySvgDeclarationComputed)[0]; | ||
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| var filename = (classView || {}).SELECTED_CLASS_NAME || "classDiagram"; | ||
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| var img = new Image(); | ||
| var url = window.URL.createObjectURL(new Blob(source.source, { "type" : 'image/svg+xml;charset=utf-8'/*"text\/xml"*/ })); | ||
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| var canvas = document.createElement('canvas'); | ||
| var ctx = canvas.getContext('2d'); | ||
| canvas.setAttribute("width", source.width); | ||
| canvas.setAttribute("height", source.height); | ||
| document.body.appendChild(canvas); | ||
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| img.onload = function () { | ||
| ctx.drawImage(img, 0, 0); | ||
| var dataURL = canvas.toDataURL("image/png"); | ||
| var a = document.createElement("a"); | ||
| a.setAttribute("download", filename + ".png"); | ||
| a.setAttribute("href", dataURL/*url*/); | ||
| document.body.appendChild(a); | ||
| a.click(); | ||
| setTimeout(function () { | ||
| a.parentNode.removeChild(a); | ||
| canvas.parentNode.removeChild(canvas); | ||
| window.URL.revokeObjectURL(url); | ||
| }, 10); | ||
| }; | ||
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| img.src = url; | ||
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| }); | ||
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| function setInlineStyles(svg, emptySvgDeclarationComputed) { | ||
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| function explicitlySetStyle (element) { | ||
| var cSSStyleDeclarationComputed = getComputedStyle(element); | ||
| var i, len, key, value; | ||
| var computedStyleStr = ""; | ||
| for (i=0, len=cSSStyleDeclarationComputed.length; i<len; i++) { | ||
| key=cSSStyleDeclarationComputed[i]; | ||
| value=cSSStyleDeclarationComputed.getPropertyValue(key); | ||
| if (value!==emptySvgDeclarationComputed.getPropertyValue(key)) { | ||
| computedStyleStr+=key+":"+value+";"; | ||
| } | ||
| } | ||
| element.setAttribute('style', computedStyleStr); | ||
| } | ||
| function traverse(obj){ | ||
| var tree = []; | ||
| tree.push(obj); | ||
| visit(obj); | ||
| function visit(node) { | ||
| if (node && node.hasChildNodes()) { | ||
| var child = node.firstChild; | ||
| while (child) { | ||
| if (child.nodeType === 1 && child.nodeName != 'SCRIPT'){ | ||
| tree.push(child); | ||
| visit(child); | ||
| } | ||
| child = child.nextSibling; | ||
| } | ||
| } | ||
| } | ||
| return tree; | ||
| } | ||
| // hardcode computed css styles inside svg | ||
| var allElements = traverse(svg); | ||
| var i = allElements.length; | ||
| while (i--){ | ||
| explicitlySetStyle(allElements[i]); | ||
| } | ||
| } | ||
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| }; |