add basic lowlight extension

packages/extension-code-block-lowlight/src/code-block-lowlight.ts

@@ -0,0 +1,35 @@
+import CodeBlock from '@tiptap/extension-code-block'
+import low from 'lowlight/lib/core'
+import { LowlightPlugin } from './lowlight-plugin'
+
+export interface CodeBlockLowlightOptions {
+  languageClassPrefix: string,
+  HTMLAttributes: {
+    [key: string]: any
+  },
+  languages: {
+    [key: string]: Function
+  },
+}
+
+export const CodeBlockLowlight = CodeBlock.extend<CodeBlockLowlightOptions>({
+  name: 'codeBlockLowlight',
+
+  defaultOptions: {
+    languageClassPrefix: 'language-',
+    HTMLAttributes: {},
+    languages: {},
+  },
+
+  onBeforeCreate() {
+    Object.entries(this.options.languages).forEach(([name, mapping]) => {
+      low.registerLanguage(name, mapping)
+    })
+  },
+
+  addProseMirrorPlugins() {
+    return [
+      LowlightPlugin({ name: 'codeBlockLowlight' }),
+    ]
+  },
+})