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8362f0cdf0
closes https://github.com/TryGhost/Ghost/issues/8958 - `markdown-it-named-headers` pulled in `String.js` despite it not being used which added a lot of String.prototype extensions and caused Ember deprecation notices - moves the short `markdown-it-named-headers` functionality directly into our app code without using `String.js`
74 lines
2.3 KiB
JavaScript
74 lines
2.3 KiB
JavaScript
/* global html_sanitize */
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import cajaSanitizers from './caja-sanitizers';
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import markdownit from 'npm:markdown-it';
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import markdownitFootnote from 'npm:markdown-it-footnote';
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import markdownitLazyHeaders from 'npm:markdown-it-lazy-headers';
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import markdownitMark from 'npm:markdown-it-mark';
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let slugify = function slugify(inputString, usedHeaders) {
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let slug = inputString.replace(/[^\w]/g, '').toLowerCase();
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if (usedHeaders[slug]) {
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usedHeaders[slug]++;
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slug += usedHeaders[slug];
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}
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return slug;
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};
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// originally from https://github.com/leff/markdown-it-named-headers
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// moved here to avoid pulling in http://stringjs.com dependency
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let markdownitNamedHeaders = function markdownitNamedHeaders(md) {
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let originalHeadingOpen = md.renderer.rules.heading_open;
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// eslint-disable-next-line camelcase
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md.renderer.rules.heading_open = function (tokens, idx, options, env, self) {
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let usedHeaders = {};
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tokens[idx].attrs = tokens[idx].attrs || [];
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let title = tokens[idx + 1].children.reduce(function (acc, t) {
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return acc + t.content;
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}, '');
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let slug = slugify(title, usedHeaders);
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tokens[idx].attrs.push(['id', slug]);
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if (originalHeadingOpen) {
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return originalHeadingOpen.apply(this, arguments);
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} else {
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return self.renderToken(...arguments);
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}
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};
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};
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// eslint-disable-next-line new-cap
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let md = markdownit({
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html: true,
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breaks: true,
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linkify: true
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})
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.use(markdownitFootnote)
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.use(markdownitLazyHeaders)
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.use(markdownitMark)
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.use(markdownitNamedHeaders);
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export default function formatMarkdown(_markdown, replaceJS = true) {
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let markdown = _markdown || '';
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let escapedhtml = '';
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// convert markdown to HTML
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escapedhtml = md.render(markdown);
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// replace script and iFrame
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if (replaceJS) {
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escapedhtml = escapedhtml.replace(/<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,
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'<pre class="js-embed-placeholder">Embedded JavaScript</pre>');
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escapedhtml = escapedhtml.replace(/<iframe\b[^<]*(?:(?!<\/iframe>)<[^<]*)*<\/iframe>/gi,
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'<pre class="iframe-embed-placeholder">Embedded iFrame</pre>');
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}
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// sanitize html
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escapedhtml = html_sanitize(escapedhtml, cajaSanitizers.url, cajaSanitizers.id);
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return escapedhtml;
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}
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