Examples: Syntax highlighting for React (#1583)

* Docs: Syntax highlighting - add react example

* Docs: Clean up syntax highlighting demo, make use of functional component

* fix: focus view asynchronously, fix #1520

Co-authored-by: Sven Adlung <info@svenadlung.de>
Co-authored-by: Philipp Kühn <kontakt@philipp-kuehn.com>

docs/src/demos/Examples/CodeBlockLanguage/React/CodeBlockComponent.jsx

@@ -0,0 +1,24 @@
+import React from 'react'
+import { NodeViewWrapper, NodeViewContent } from '@tiptap/react'
+import './CodeBlockComponent.scss'
+
+export default ({ node: { attrs: { language: defaultLanguage } }, updateAttributes, extension }) => (
+  <NodeViewWrapper className="code-block">
+    <select contentEditable={false} defaultValue={defaultLanguage} onChange={event => updateAttributes({ language: event.target.value })}>
+      <option value="null">
+        auto
+      </option>
+      <option disabled>
+        —
+      </option>
+      {extension.options.lowlight.listLanguages().map((lang, index) => (
+        <option key={index} value={lang}>
+          {lang}
+        </option>
+      ))}
+    </select>
+    <pre>
+      <NodeViewContent as="code" />
+    </pre>
+  </NodeViewWrapper>
+)

docs/src/demos/Examples/CodeBlockLanguage/React/CodeBlockComponent.scss

@@ -0,0 +1,9 @@
+.code-block {
+  position: relative;
+
+  select {
+    position: absolute;
+    right: 0.5rem;
+    top: 0.5rem;
+  }
+}

docs/src/demos/Examples/CodeBlockLanguage/React/index.jsx

@@ -0,0 +1,71 @@
+import React from 'react'
+import { useEditor, EditorContent, ReactNodeViewRenderer } from '@tiptap/react'
+import Document from '@tiptap/extension-document'
+import Paragraph from '@tiptap/extension-paragraph'
+import Text from '@tiptap/extension-text'
+import CodeBlockLowlight from '@tiptap/extension-code-block-lowlight'
+import CodeBlockComponent from './CodeBlockComponent'
+
+// load all highlight.js languages
+import lowlight from 'lowlight'
+
+// load specific languages only
+// import lowlight from 'lowlight/lib/core'
+// import javascript from 'highlight.js/lib/languages/javascript'
+// lowlight.registerLanguage('javascript', javascript)
+import './styles.scss'
+
+const MenuBar = ({ editor }) => {
+  if (!editor) {
+    return null
+  }
+
+  return (
+    <button onClick={() => editor.chain().focus().toggleCodeBlock().run()} className={editor.isActive('codeBlock') ? 'is-active' : ''}>
+      code block
+    </button>
+  )
+}
+
+export default () => {
+  const editor = useEditor({
+    extensions: [
+      Document,
+      Paragraph,
+      Text,
+      CodeBlockLowlight
+        .extend({
+          addNodeView() {
+            return ReactNodeViewRenderer(CodeBlockComponent)
+          },
+        })
+        .configure({ lowlight }),
+    ],
+    content: `
+        <p>
+          That’s a boring paragraph followed by a fenced code block:
+        </p>
+        <pre><code class="language-javascript">for (var i=1; i <= 20; i++)
+{
+  if (i % 15 == 0)
+    console.log("FizzBuzz");
+  else if (i % 3 == 0)
+    console.log("Fizz");
+  else if (i % 5 == 0)
+    console.log("Buzz");
+  else
+    console.log(i);
+}</code></pre>
+        <p>
+          Press Command/Ctrl + Enter to leave the fenced code block and continue typing in boring paragraphs.
+        </p>
+      `,
+  })
+
+  return (
+    <div>
+      <MenuBar editor={editor} />
+      <EditorContent editor={editor} />
+    </div>
+  )
+}

docs/src/demos/Examples/CodeBlockLanguage/React/styles.scss

@@ -0,0 +1,73 @@
+/* Basic editor styles */
+.ProseMirror {
+  > * + * {
+    margin-top: 0.75em;
+  }
+
+  pre {
+    background: #0d0d0d;
+    color: #fff;
+    font-family: "JetBrainsMono", monospace;
+    padding: 0.75rem 1rem;
+    border-radius: 0.5rem;
+
+    code {
+      color: inherit;
+      padding: 0;
+      background: none;
+      font-size: 0.8rem;
+    }
+
+    .hljs-comment,
+    .hljs-quote {
+      color: #616161;
+    }
+
+    .hljs-variable,
+    .hljs-template-variable,
+    .hljs-attribute,
+    .hljs-tag,
+    .hljs-name,
+    .hljs-regexp,
+    .hljs-link,
+    .hljs-name,
+    .hljs-selector-id,
+    .hljs-selector-class {
+      color: #f98181;
+    }
+
+    .hljs-number,
+    .hljs-meta,
+    .hljs-built_in,
+    .hljs-builtin-name,
+    .hljs-literal,
+    .hljs-type,
+    .hljs-params {
+      color: #fbbc88;
+    }
+
+    .hljs-string,
+    .hljs-symbol,
+    .hljs-bullet {
+      color: #b9f18d;
+    }
+
+    .hljs-title,
+    .hljs-section {
+      color: #faf594;
+    }
+
+    .hljs-keyword,
+    .hljs-selector-tag {
+      color: #70cff8;
+    }
+
+    .hljs-emphasis {
+      font-style: italic;
+    }
+
+    .hljs-strong {
+      font-weight: 700;
+    }
+  }
+}

docs/src/docPages/examples/syntax-highlighting.md

@@ -1,3 +1,6 @@
 # Syntax highlighting
 
-<demo name="Examples/CodeBlockLanguage" />
+<demos :items="{
+  Vue: 'Examples/CodeBlockLanguage/Vue',
+  React: 'Examples/CodeBlockLanguage/React',
+}" />

packages/core/src/commands/focus.ts

@@ -73,7 +73,13 @@ export const focus: RawCommands['focus'] = (position = null) => ({
       tr.setStoredMarks(storedMarks)
     }
 
-    view.focus()
+    // focus async because in some situations weird things happen
+    // see: https://github.com/ueberdosis/tiptap/issues/1520
+    setTimeout(() => {
+      if (!editor.isDestroyed) {
+        view.focus()
+      }
+    }, 0)
   }
 
   return true