278 lines
10 KiB
JavaScript
278 lines
10 KiB
JavaScript
/* globals jQuery, MathJax */
|
|
/*
|
|
* ext-mathjax.js
|
|
*
|
|
* Licensed under the Apache License
|
|
*
|
|
* Copyright(c) 2013 Jo Segaert
|
|
*
|
|
*/
|
|
import svgEditor from '../svg-editor.js';
|
|
svgEditor.addExtension('mathjax', function () {
|
|
const $ = jQuery;
|
|
const svgCanvas = svgEditor.canvas;
|
|
|
|
// Configuration of the MathJax extention.
|
|
|
|
// This will be added to the head tag before MathJax is loaded.
|
|
const /* mathjaxConfiguration = `<script type="text/x-mathjax-config">
|
|
MathJax.Hub.Config({
|
|
extensions: ['tex2jax.js'],
|
|
jax: ['input/TeX', 'output/SVG'],
|
|
showProcessingMessages: true,
|
|
showMathMenu: false,
|
|
showMathMenuMSIE: false,
|
|
errorSettings: {
|
|
message: ['[Math Processing Error]'],
|
|
style: {color: '#CC0000', 'font-style': 'italic'}
|
|
},
|
|
elements: [],
|
|
tex2jax: {
|
|
ignoreClass: 'tex2jax_ignore2', processClass: 'tex2jax_process2',
|
|
},
|
|
TeX: {
|
|
extensions: ['AMSmath.js', 'AMSsymbols.js', 'noErrors.js', 'noUndefined.js']
|
|
},
|
|
SVG: {
|
|
}
|
|
});
|
|
</script>`, */
|
|
// mathjaxSrc = 'http://cdn.mathjax.org/mathjax/latest/MathJax.js',
|
|
// Had been on https://c328740.ssl.cf1.rackcdn.com/mathjax/latest/MathJax.js?config=TeX-AMS-MML_SVG.js
|
|
// Obtained Text-AMS-MML_SVG.js from https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.3/config/TeX-AMS-MML_SVG.js
|
|
mathjaxSrcSecure = 'mathjax/MathJax.js?config=TeX-AMS-MML_SVG.js',
|
|
{uiStrings} = svgEditor;
|
|
let
|
|
math,
|
|
locationX,
|
|
locationY,
|
|
mathjaxLoaded = false;
|
|
|
|
// TODO: Implement language support. Move these uiStrings to the locale files and the code to the langReady callback.
|
|
$.extend(uiStrings, {
|
|
mathjax: {
|
|
embed_svg: 'Save as mathematics',
|
|
embed_mathml: 'Save as figure',
|
|
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. ',
|
|
mathml_save_warning: 'Advised. The math will be saved as a figure.',
|
|
title: 'Mathematics code editor'
|
|
}
|
|
});
|
|
|
|
function saveMath () {
|
|
const code = $('#mathjax_code_textarea').val();
|
|
// displaystyle to force MathJax NOT to use the inline style. Because it is
|
|
// less fancy!
|
|
MathJax.Hub.queue.Push(['Text', math, '\\displaystyle{' + code + '}']);
|
|
|
|
/*
|
|
* The MathJax library doesn't want to bloat your webpage so it creates
|
|
* every symbol (glymph) you need only once. These are saved in a <svg> on
|
|
* the top of your html document, just under the body tag. Each glymph has
|
|
* its unique id and is saved as a <path> in the <defs> tag of the <svg>
|
|
*
|
|
* Then when the symbols are needed in the rest of your html document they
|
|
* are refferd to by a <use> tag.
|
|
* Because of bug 1076 we can't just grab the defs tag on the top and add it
|
|
* to your formula's <svg> and copy the lot. So we have to replace each
|
|
* <use> tag by it's <path>.
|
|
*/
|
|
MathJax.Hub.queue.Push(
|
|
function () {
|
|
const mathjaxMath = $('.MathJax_SVG');
|
|
const svg = $(mathjaxMath.html());
|
|
svg.find('use').each(function () {
|
|
// TODO: find a less pragmatic and more elegant solution to this.
|
|
const id = $(this).attr('href')
|
|
? $(this).attr('href').slice(1) // Works in Chrome.
|
|
: $(this).attr('xlink:href').slice(1); // Works in Firefox.
|
|
const glymph = $('#' + id).clone().removeAttr('id');
|
|
const x = $(this).attr('x');
|
|
const y = $(this).attr('y');
|
|
const transform = $(this).attr('transform');
|
|
if (transform && (x || y)) {
|
|
glymph.attr('transform', transform + ' translate(' + x + ',' + y + ')');
|
|
} else if (transform) {
|
|
glymph.attr('transform', transform);
|
|
} else if (x || y) {
|
|
glymph.attr('transform', 'translate(' + x + ',' + y + ')');
|
|
}
|
|
$(this).replaceWith(glymph);
|
|
});
|
|
// Remove the style tag because it interferes with SVG-Edit.
|
|
svg.removeAttr('style');
|
|
svg.attr('xmlns', 'http://www.w3.org/2000/svg');
|
|
svgCanvas.importSvgString($('<div>').append(svg.clone()).html(), true);
|
|
svgCanvas.ungroupSelectedElement();
|
|
// TODO: To undo the adding of the Formula you now have to undo twice.
|
|
// This should only be once!
|
|
svgCanvas.moveSelectedElements(locationX, locationY, true);
|
|
}
|
|
);
|
|
}
|
|
|
|
return {
|
|
name: 'MathJax',
|
|
svgicons: svgEditor.curConfig.extIconsPath + 'mathjax-icons.xml',
|
|
buttons: [{
|
|
id: 'tool_mathjax',
|
|
type: 'mode',
|
|
title: 'Add Mathematics',
|
|
events: {
|
|
click () {
|
|
// Only load Mathjax when needed, we don't want to strain Svg-Edit any more.
|
|
// From this point on it is very probable that it will be needed, so load it.
|
|
if (mathjaxLoaded === false) {
|
|
$('<div id="mathjax">' +
|
|
'<!-- Here is where MathJax creates the math -->' +
|
|
'<div id="mathjax_creator" class="tex2jax_process" style="display:none">' +
|
|
'$${}$$' +
|
|
'</div>' +
|
|
'<div id="mathjax_overlay"></div>' +
|
|
'<div id="mathjax_container">' +
|
|
'<div id="tool_mathjax_back" class="toolbar_button">' +
|
|
'<button id="tool_mathjax_save">OK</button>' +
|
|
'<button id="tool_mathjax_cancel">Cancel</button>' +
|
|
'</div>' +
|
|
'<fieldset>' +
|
|
'<legend id="mathjax_legend">Mathematics Editor</legend>' +
|
|
'<label>' +
|
|
'<span id="mathjax_explication">Please type your mathematics in ' +
|
|
'<a href="https://en.wikipedia.org/wiki/Help:Displaying_a_formula" target="_blank">TeX</a> code.</span></label>' +
|
|
'<textarea id="mathjax_code_textarea" spellcheck="false"></textarea>' +
|
|
'</fieldset>' +
|
|
'</div>' +
|
|
'</div>'
|
|
).insertAfter('#svg_prefs').hide();
|
|
|
|
// Make the MathEditor draggable.
|
|
$('#mathjax_container').draggable({cancel: 'button,fieldset', containment: 'window'});
|
|
|
|
// Add functionality and picture to cancel button.
|
|
$('#tool_mathjax_cancel').prepend($.getSvgIcon('cancel', true))
|
|
.on('click touched', function () {
|
|
$('#mathjax').hide();
|
|
});
|
|
|
|
// Add functionality and picture to the save button.
|
|
$('#tool_mathjax_save').prepend($.getSvgIcon('ok', true))
|
|
.on('click touched', function () {
|
|
saveMath();
|
|
$('#mathjax').hide();
|
|
});
|
|
|
|
// MathJax preprocessing has to ignore most of the page.
|
|
$('body').addClass('tex2jax_ignore');
|
|
|
|
// Now get (and run) the MathJax Library.
|
|
// Todo: insert script with modules once widely supported
|
|
// and if MathJax (and its `TeX-AMS-MML_SVG.js` dependency) ends up
|
|
// providing an ES6 module export: https://github.com/mathjax/MathJax/issues/1998
|
|
/*
|
|
const s = document.createElement('script');
|
|
const modularVersion = !('svgEditor' in window) ||
|
|
!window.svgEditor ||
|
|
window.svgEditor.modules !== false;
|
|
if (modularVersion) {
|
|
s.type = 'module'; // Make this the default when widely supported
|
|
}
|
|
s.src = curConfig.extPath + mathjaxSrcSecure;
|
|
// See `executeAfterLoads` in `svgutils.js`
|
|
*/
|
|
$.getScript(svgEditor.curConfig.extIconsPath + mathjaxSrcSecure)
|
|
.done(function (script, textStatus) {
|
|
// When MathJax is loaded get the div where the math will be rendered.
|
|
MathJax.Hub.queue.Push(function () {
|
|
math = MathJax.Hub.getAllJax('#mathjax_creator')[0];
|
|
console.log(math);
|
|
mathjaxLoaded = true;
|
|
console.log('MathJax Loaded');
|
|
});
|
|
})
|
|
// If it fails.
|
|
.fail(function () {
|
|
console.log('Failed loadeing MathJax.');
|
|
$.alert('Failed loading MathJax. You will not be able to change the mathematics.');
|
|
});
|
|
}
|
|
// Set the mode.
|
|
svgCanvas.setMode('mathjax');
|
|
}
|
|
}
|
|
}],
|
|
|
|
mouseDown () {
|
|
if (svgCanvas.getMode() === 'mathjax') {
|
|
return {started: true};
|
|
}
|
|
},
|
|
mouseUp (opts) {
|
|
if (svgCanvas.getMode() === 'mathjax') {
|
|
// Get the coordinates from your mouse.
|
|
const zoom = svgCanvas.getZoom();
|
|
// Get the actual coordinate by dividing by the zoom value
|
|
locationX = opts.mouse_x / zoom;
|
|
locationY = opts.mouse_y / zoom;
|
|
|
|
$('#mathjax').show();
|
|
return {started: false}; // Otherwise the last selected object dissapears.
|
|
}
|
|
},
|
|
callback () {
|
|
$('<style>').text(
|
|
'#mathjax fieldset{' +
|
|
'padding: 5px;' +
|
|
'margin: 5px;' +
|
|
'border: 1px solid #DDD;' +
|
|
'}' +
|
|
'#mathjax label{' +
|
|
'display: block;' +
|
|
'margin: .5em;' +
|
|
'}' +
|
|
'#mathjax legend {' +
|
|
'max-width:195px;' +
|
|
'}' +
|
|
'#mathjax_overlay {' +
|
|
'position: absolute;' +
|
|
'top: 0;' +
|
|
'left: 0;' +
|
|
'right: 0;' +
|
|
'bottom: 0;' +
|
|
'background-color: black;' +
|
|
'opacity: 0.6;' +
|
|
'z-index: 20000;' +
|
|
'}' +
|
|
'#mathjax_container {' +
|
|
'position: absolute;' +
|
|
'top: 50px;' +
|
|
'padding: 10px;' +
|
|
'background-color: #B0B0B0;' +
|
|
'border: 1px outset #777;' +
|
|
'opacity: 1.0;' +
|
|
'font-family: Verdana, Helvetica, sans-serif;' +
|
|
'font-size: .8em;' +
|
|
'z-index: 20001;' +
|
|
'}' +
|
|
'#tool_mathjax_back {' +
|
|
'margin-left: 1em;' +
|
|
'overflow: auto;' +
|
|
'}' +
|
|
'#mathjax_legend{' +
|
|
'font-weight: bold;' +
|
|
'font-size:1.1em;' +
|
|
'}' +
|
|
'#mathjax_code_textarea {\\n' +
|
|
'margin: 5px .7em;' +
|
|
'overflow: hidden;' +
|
|
'width: 416px;' +
|
|
'display: block;' +
|
|
'height: 100px;' +
|
|
'}'
|
|
).appendTo('head');
|
|
|
|
// Add the MathJax configuration.
|
|
// $(mathjaxConfiguration).appendTo('head');
|
|
}
|
|
};
|
|
});
|