274 lines
9.3 KiB
JavaScript
274 lines
9.3 KiB
JavaScript
/*globals MathJax, svgEditor, svgCanvas, $*/
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/*jslint es5: true, todo: true, vars: true*/
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/*
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* ext-mathjax.js
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*
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* Licensed under the Apache License
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*
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* Copyright(c) 2013 Jo Segaert
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*
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*/
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svgEditor.addExtension("mathjax", function() {'use strict';
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// Configuration of the MathJax extention.
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// This will be added to the head tag before MathJax is loaded.
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var /*mathjaxConfiguration = '<script type="text/x-mathjax-config">\
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MathJax.Hub.Config({\
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extensions: ["tex2jax.js"],\
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jax: ["input/TeX","output/SVG"],\
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showProcessingMessages: true,\
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showMathMenu: false,\
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showMathMenuMSIE: false,\
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errorSettings: {\
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message: ["[Math Processing Error]"],\
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style: {color: "#CC0000", "font-style":"italic"}\
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},\
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elements: [],\
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tex2jax: {\
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ignoreClass: "tex2jax_ignore2", processClass: "tex2jax_process2",\
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},\
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TeX: {\
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extensions: ["AMSmath.js","AMSsymbols.js","noErrors.js","noUndefined.js"]\
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},\
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"SVG": {\
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}\
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});\
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</script>',*/
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// mathjaxSrc = 'http://cdn.mathjax.org/mathjax/latest/MathJax.js',
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mathjaxSrcSecure = 'https://c328740.ssl.cf1.rackcdn.com/mathjax/latest/MathJax.js?config=TeX-AMS-MML_SVG.js',
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math,
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locationX,
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locationY,
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mathjaxLoaded = false,
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uiStrings = svgEditor.uiStrings;
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// TODO: Implement language support. Move these uiStrings to the locale files and the code to the langReady callback.
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$.extend(uiStrings, {
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mathjax: {
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embed_svg: 'Save as mathematics',
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embed_mathml: 'Save as figure',
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svg_save_warning: 'The math will be transformed into a figure is manipulatable like everything else. You will not be able to manipulate the TeX-code anymore. ',
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mathml_save_warning: 'Advised. The math will be saved as a figure.',
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title: 'Mathematics code editor'
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}
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});
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function saveMath() {
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var code = $('#mathjax_code_textarea').val();
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// displaystyle to force MathJax NOT to use the inline style. Because it is
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// less fancy!
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MathJax.Hub.queue.Push(['Text', math, '\\displaystyle{' + code + '}']);
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/*
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* The MathJax library doesn't want to bloat your webpage so it creates
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* every symbol (glymph) you need only once. These are saved in a <svg> on
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* the top of your html document, just under the body tag. Each glymph has
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* its unique id and is saved as a <path> in the <defs> tag of the <svg>
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*
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* Then when the symbols are needed in the rest of your html document they
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* are refferd to by a <use> tag.
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* Because of bug 1076 we can't just grab the defs tag on the top and add it
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* to your formula's <svg> and copy the lot. So we have to replace each
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* <use> tag by it's <path>.
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*/
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MathJax.Hub.queue.Push(
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function() {
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var mathjaxMath = $('.MathJax_SVG');
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var svg = $(mathjaxMath.html());
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svg.find('use').each(function() {
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var x, y, id, transform;
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// TODO: find a less pragmatic and more elegant solution to this.
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if ($(this).attr('href')) {
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id = $(this).attr('href').slice(1); // Works in Chrome.
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} else {
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id = $(this).attr('xlink:href').slice(1); // Works in Firefox.
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}
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var glymph = $('#' + id).clone().removeAttr('id');
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x = $(this).attr('x');
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y = $(this).attr('y');
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transform = $(this).attr('transform');
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if (transform && ( x || y )) {
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glymph.attr('transform', transform + ' translate(' + x + ',' + y + ')');
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}
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else if (transform) {
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glymph.attr('transform', transform);
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}
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else if (x || y) {
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glymph.attr('transform', 'translate(' + x + ',' + y + ')');
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}
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$(this).replaceWith(glymph);
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});
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// Remove the style tag because it interferes with SVG-Edit.
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svg.removeAttr('style');
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svg.attr('xmlns', 'http://www.w3.org/2000/svg');
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svgCanvas.importSvgString($('<div>').append(svg.clone()).html(), true);
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svgCanvas.ungroupSelectedElement();
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// TODO: To undo the adding of the Formula you now have to undo twice.
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// This should only be once!
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svgCanvas.moveSelectedElements(locationX, locationY, true);
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}
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);
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}
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return {
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name: "MatJax",
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svgicons: svgEditor.curConfig.extPath + "mathjax-icons.xml",
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buttons: [{
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id: "tool_mathjax",
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type: "mode",
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title: "Add Mathematics",
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events: {
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'click': function() {
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// Only load Mathjax when needed, we don't want to strain Svg-Edit any more.
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// From this point on it is very probable that it will be needed, so load it.
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if (mathjaxLoaded === false) {
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$('<div id="mathjax">\
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<!-- Here is where MathJax creates the math -->\
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<div id="mathjax_creator" class="tex2jax_process" style="display:none">\
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$${}$$\
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</div>\
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<div id="mathjax_overlay"></div>\
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<div id="mathjax_container">\
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<div id="tool_mathjax_back" class="toolbar_button">\
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<button id="tool_mathjax_save">OK</button>\
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<button id="tool_mathjax_cancel">Cancel</button>\
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</div>\
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<fieldset>\
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<legend id="mathjax_legend">Mathematics Editor</legend>\
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<label>\
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<span id="mathjax_explication">Please type your mathematics in \
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<a href="http://en.wikipedia.org/wiki/Help:Displaying_a_formula" target="_blank">TeX</a> code.</span></label>\
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<textarea id="mathjax_code_textarea" spellcheck="false"></textarea>\
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</fieldset>\
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</div>\
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</div>'
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).insertAfter('#svg_prefs').hide();
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// Make the MathEditor draggable.
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$('#mathjax_container').draggable({cancel: 'button,fieldset', containment: 'window'});
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// Add functionality and picture to cancel button.
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$('#tool_mathjax_cancel').prepend($.getSvgIcon('cancel', true))
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.on("click touched", function() {
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$('#mathjax').hide();
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});
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// Add functionality and picture to the save button.
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$('#tool_mathjax_save').prepend($.getSvgIcon('ok', true))
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.on("click touched", function() {
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saveMath();
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$('#mathjax').hide();
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});
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// MathJax preprocessing has to ignore most of the page.
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$('body').addClass('tex2jax_ignore');
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// Now get (and run) the MathJax Library.
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$.getScript(mathjaxSrcSecure)
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.done(function(script, textStatus) {
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// When MathJax is loaded get the div where the math will be rendered.
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MathJax.Hub.queue.Push(function() {
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math = MathJax.Hub.getAllJax('#mathjax_creator')[0];
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console.log(math);
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mathjaxLoaded = true;
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console.log('MathJax Loaded');
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});
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})
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// If it fails.
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.fail(function() {
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console.log("Failed loadeing MathJax.");
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$.alert("Failed loading MathJax. You will not be able to change the mathematics.");
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});
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}
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// Set the mode.
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svgCanvas.setMode("mathjax");
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}
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}
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}],
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mouseDown: function() {
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if (svgCanvas.getMode() === "mathjax") {
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return {started: true};
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}
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},
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mouseUp: function(opts) {
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if (svgCanvas.getMode() === "mathjax") {
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// Get the coordinates from your mouse.
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var zoom = svgCanvas.getZoom();
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// Get the actual coordinate by dividing by the zoom value
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locationX = opts.mouse_x / zoom;
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locationY = opts.mouse_y / zoom;
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$('#mathjax').show();
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return {started: false}; // Otherwise the last selected object dissapears.
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}
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},
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callback: function() {
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$('<style>').text('\
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#mathjax fieldset{\
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padding: 5px;\
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margin: 5px;\
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border: 1px solid #DDD;\
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}\
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#mathjax label{\
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display: block;\
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margin: .5em;\
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}\
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#mathjax legend {\
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max-width:195px;\
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}\
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#mathjax_overlay {\
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position: absolute;\
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top: 0;\
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left: 0;\
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right: 0;\
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bottom: 0;\
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background-color: black;\
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opacity: 0.6;\
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z-index: 20000;\
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}\
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\
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#mathjax_container {\
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position: absolute;\
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top: 50px;\
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padding: 10px;\
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background-color: #B0B0B0;\
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border: 1px outset #777;\
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opacity: 1.0;\
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font-family: Verdana, Helvetica, sans-serif;\
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font-size: .8em;\
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z-index: 20001;\
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}\
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\
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#tool_mathjax_back {\
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margin-left: 1em;\
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overflow: auto;\
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}\
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\
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#mathjax_legend{\
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font-weight: bold;\
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font-size:1.1em;\
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}\
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\
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#mathjax_code_textarea {\\n\
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margin: 5px .7em;\
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overflow: hidden;\
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width: 416px;\
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display: block;\
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height: 100px;\
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}\
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').appendTo('head');
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// Add the MathJax configuration.
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//$(mathjaxConfiguration).appendTo('head');
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}
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};
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});
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