Move and rename files (2/4) (#987)

Signed-off-by: Tilman Vatteroth <tilman.vatteroth@tu-dortmund.de>

src/components/editor-page/editor-pane/autocompletion/code-block.ts

@@ -0,0 +1,46 @@
+/*
+ * SPDX-FileCopyrightText: 2021 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { Editor, Hint, Hints, Pos } from 'codemirror'
+import { findWordAtCursor, Hinter, search } from './index'
+
+const wordRegExp = /^```((\w|-|_|\+)*)$/
+let allSupportedLanguages: string[] = []
+
+const codeBlockHint = (editor: Editor): Promise< Hints| null > => {
+  return import(/* webpackChunkName: "highlight.js" */ '../../../common/hljs/hljs').then((hljs) =>
+    new Promise((resolve) => {
+      const searchTerm = findWordAtCursor(editor)
+      const searchResult = wordRegExp.exec(searchTerm.text)
+      if (searchResult === null) {
+        resolve(null)
+        return
+      }
+      const term = searchResult[1]
+      if (allSupportedLanguages.length === 0) {
+        allSupportedLanguages = hljs.default.listLanguages().concat('csv', 'flow', 'html', 'js', 'markmap', 'abc', 'graphviz', 'mermaid', 'vega-lite')
+      }
+      const suggestions = search(term, allSupportedLanguages)
+      const cursor = editor.getCursor()
+      if (!suggestions) {
+        resolve(null)
+      } else {
+        resolve({
+          list: suggestions.map((suggestion: string): Hint => ({
+            text: '```' + suggestion + '\n\n```\n',
+            displayText: suggestion
+          })),
+          from: Pos(cursor.line, searchTerm.start),
+          to: Pos(cursor.line, searchTerm.end)
+        })
+      }
+    }))
+}
+
+export const CodeBlockHinter: Hinter = {
+  wordRegExp,
+  hint: codeBlockHint
+}