mirror of
https://github.com/facebook/docusaurus.git
synced 2025-04-29 02:08:36 +02:00
85 lines
2.6 KiB
JavaScript
85 lines
2.6 KiB
JavaScript
/**
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* Copyright (c) 2017-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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const hljs = require('highlight.js');
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const Markdown = require('remarkable');
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const toSlug = require('./toSlug.js');
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const CWD = process.cwd();
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/**
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* The anchors plugin adds GFM-style anchors to headings.
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*/
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function anchors(md) {
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md.renderer.rules.heading_open = function(tokens, idx /*, options, env */) {
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const textToken = tokens[idx + 1];
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return (
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'<h' +
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tokens[idx].hLevel +
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'><a class="anchor" aria-hidden="true" id="' +
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toSlug(textToken.content) +
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'"></a><a href="#' +
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toSlug(textToken.content) +
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'" aria-hidden="true" class="hash-link" ><svg aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>'
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);
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};
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}
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class MarkdownRenderer {
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constructor() {
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const siteConfig = require(CWD + '/siteConfig.js');
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const md = new Markdown({
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// Highlight.js expects hljs css classes on the code element.
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// This results in <pre><code class="hljs css javascript">
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langPrefix: 'hljs css ',
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highlight: function(str, lang) {
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lang =
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lang || (siteConfig.highlight && siteConfig.highlight.defaultLang);
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if (lang && hljs.getLanguage(lang)) {
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try {
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return hljs.highlight(lang, str).value;
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} catch (err) {}
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}
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try {
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return hljs.highlightAuto(str).value;
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} catch (err) {}
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return '';
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},
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html: true,
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linkify: true,
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});
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// Register anchors plugin
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md.use(anchors);
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// Allow client sites to register their own plugins
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if (siteConfig.markdownPlugins) {
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siteConfig.markdownPlugins.forEach(function(plugin) {
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md.use(plugin);
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});
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}
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this._md = md;
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}
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toHtml(source) {
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const html = this._md.render(source);
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// Ensure fenced code blocks use Highlight.js hljs class
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// https://github.com/jonschlinkert/remarkable/issues/224
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return html.replace(/<pre><code>/g, '<pre><code class="hljs">');
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}
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}
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const renderMarkdown = new MarkdownRenderer();
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module.exports = source => {
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return renderMarkdown.toHtml(source);
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};
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