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TiddlyWiki5/plugins/tiddlywiki/katex/latex-parser.js
Jermolene 96b7d0eeba First pass at KaTeX plugin
Finally fixes #458 thanks to the KaTeX plugin from Khan Academy
2014-09-21 23:03:07 +01:00

61 lines
1.2 KiB
JavaScript

/*\
title: $:/plugins/tiddlywiki/katex/latex-parser.js
type: application/javascript
module-type: wikirule
Wiki text inline rule for LaTeX. For example:
```
$$latex-goes-here$$
```
This wikiparser can be modified using the rules eg:
```
\rules except latex-parser
\rules only latex-parser
```
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
exports.name = "latex-parser";
exports.types = {inline: true};
exports.init = function(parser) {
this.parser = parser;
// Regexp to match
this.matchRegExp = /\$\$(?!\$)/mg;
};
exports.parse = function() {
// Move past the match
this.parser.pos = this.matchRegExp.lastIndex;
var reEnd = /\$\$/mg;
// Look for the end marker
reEnd.lastIndex = this.parser.pos;
var match = reEnd.exec(this.parser.source),
text;
// Process the text
if(match) {
text = this.parser.source.substring(this.parser.pos,match.index);
this.parser.pos = match.index + match[0].length;
} else {
text = this.parser.source.substr(this.parser.pos);
this.parser.pos = this.parser.sourceLength;
}
return [{
type: "latex",
attributes: {
text: {
type: "text",
value: text
}}
}];
};
})();