Klemek
102 lines
2.7 KiB
JavaScript
102 lines
2.7 KiB
JavaScript
const fs = require('fs');
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const showdown = require('showdown');
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module.exports = (config) => {
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const converter = new showdown.Converter(config['showdown']);
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const renderShowDown = (data, cb) => {
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const html = converter.makeHtml(data);
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cb(html);
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};
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let Prism;
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if (config['modules']['prism'])
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Prism = require('node-prismjs');
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const renderPrism = (data, cb) => {
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if (!config['modules']['prism'])
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return cb(data);
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const codeRegex = /```([\w-]+)\r?\n((?:(?!```)[\s\S])*)\r?\n```/m;
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let match;
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while ((match = codeRegex.exec(data))) {
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const lang = match[1].trim();
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const code = match[2].trim();
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try {
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const block = Prism.highlight(code, Prism.languages[lang] || Prism.languages.autoit, lang);
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data = data.slice(0, match.index) + `<pre><code class="${lang} language-${lang}">` + block + '</code></pre>' + data.slice(match.index + match[0].length);
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} catch (err) {
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console.error(err);
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}
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}
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cb(data);
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};
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let mjAPI;
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if (config['modules']['mathjax']) {
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mjAPI = require('mathjax-node');
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mjAPI.config({
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MathJax: {
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tex2jax: {
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inlineMath: [['$', '$']],
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displayMath: [['$$', '$$']]
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}
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}
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});
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}
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const renderMathJax = (data, cb) => {
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if (!config['modules']['mathjax'])
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return cb(data);
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const doMJ = (match, format) => {
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const eq = match[1].trim();
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const output = config['mathjax']['output_format'];
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const mjConf = {
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math: eq,
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format: format,
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speakText: config['mathjax']['speak_text']
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};
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mjConf[output] = true;
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mjAPI.typeset(mjConf, (res) => {
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data = data.slice(0, match.index) + res[output] + data.slice(match.index + match[0].length);
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renderMathJax(data, (data2) => {
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cb(data2);
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});
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});
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};
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const eqRegex = /\$\$((?:(?!\$\$)[\s\S])*)\$\$/m;
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const inlineEqRegex = /\$([^$\n]*)\$/;
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let match;
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if ((match = eqRegex.exec(data))) {
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doMJ(match, 'TeX');
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} else if ((match = inlineEqRegex.exec(data))) {
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doMJ(match, 'inline-TeX');
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} else {
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cb(data);
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}
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};
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return {
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renderShowDown: config['test'] ? renderShowDown : undefined,
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renderPrism: config['test'] ? renderPrism : undefined,
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renderMathJax: config['test'] ? renderMathJax : undefined,
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render: (file, cb) => {
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fs.readFile(file, {encoding: 'UTF-8'}, (err, data) => {
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if (err)
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return cb(err);
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renderPrism(data, (data2) => {
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renderMathJax(data2, (data3) => {
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renderShowDown(data3, (html) => {
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cb(null, html);
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});
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});
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});
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});
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}
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};
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};
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