ui-default: init

将ui-default合并至主存储库便于维护

packages/ui-default/backendlib/markdown.js

@@ -0,0 +1,73 @@
+const MarkdownIt = require('markdown-it');
+const Prism = require('prismjs');
+
+// For math: $a\times b\eq 10$
+// Specific image size: ![image](image.png =100x100)
+const Imsize = require('markdown-it-imsize');
+/* Footnote support.
+Here is a footnote reference,[^1] and another.[^longnote]
+
+[^1]: Here is the footnote.
+
+[^longnote]: Here's one with multiple blocks.
+
+    Subsequent paragraphs are indented to show that they
+belong to the previous footnote.
+*/
+const Footnote = require('markdown-it-footnote');
+// ==Highlight==
+const Mark = require('markdown-it-mark');
+const TOC = require('markdown-it-table-of-contents');
+const Anchor = require('markdown-it-anchor');
+// @[url](videourl)
+// @[youtube](https://youtube.com/watch?v=xxx)
+// @[pdf](https://foo.com/bar.pdf)
+const Media = require('./markdown-it-media');
+const Katex = require('./markdown-it-katex');
+
+require('prismjs/components/index');
+
+class Markdown extends MarkdownIt {
+  constructor() {
+    super({
+      linkify: true,
+      highlight(str, lang) {
+        if (lang && Prism.languages[lang]) {
+          try {
+            return Prism.highlight(str, Prism.languages[lang], lang);
+          } catch (__) { } // eslint-disable-line no-empty
+        }
+        return '';
+      },
+    });
+    this.linkify.tlds('.py', false);
+    this.use(Media);
+    this.use(Imsize);
+    this.use(Footnote);
+    this.use(Mark);
+    this.use(Anchor);
+    this.use(TOC);
+    this.use(Katex);
+  }
+}
+
+const md = new Markdown();
+
+function plugin(func, ...args) {
+  md.use(func, ...args);
+}
+
+function render(text, html = false) {
+  md.set({ html: !!html });
+  return md.render(text);
+}
+
+function renderInline(text, html = false) {
+  md.set({ html: !!html });
+  return md.renderInline(text);
+}
+
+// eslint-disable-next-line no-multi-assign
+global.Hydro.lib.markdown = module.exports = {
+  md, plugin, render, renderInline,
+};