feat(site-builder): add insert/colour/format toolbar to the Edit HTML modal

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

craft/src/panels/right/styles/HtmlCodeField.tsx

@@ -1,7 +1,9 @@
-import React, { useState } from 'react';
+import React, { useRef, useState } from 'react';
 import { CollapsibleSection, sectionGap } from './shared';
 import { Modal } from '../../../ui/Modal';
-import { CodeEditor } from '../../../ui/CodeEditor';
+import { CodeEditor, type CodeEditorHandle } from '../../../ui/CodeEditor';
+import { HtmlToolbar } from './HtmlToolbar';
+import { formatHtml } from '../../../utils/format-html';
 
 /* "Edit HTML" modal for the HtmlBlock `code` prop. `code` is raw HTML
    (potentially many lines, embedded <style>/<script>), so it gets a
@@ -9,6 +11,11 @@ import { CodeEditor } from '../../../ui/CodeEditor';
    generic single-line/textarea string-prop rendering. */
 export const HtmlCodeField: React.FC<{ value: string; onChange: (v: string) => void }> = ({ value, onChange }) => {
   const [open, setOpen] = useState(false);
+  const editorRef = useRef<CodeEditorHandle>(null);
+  const handleFormat = (): void => {
+    const current = editorRef.current?.getValue() ?? value;
+    onChange(formatHtml(current));
+  };
   return (
     <CollapsibleSection title="HTML Code">
       <div style={sectionGap}>
@@ -54,7 +61,8 @@ export const HtmlCodeField: React.FC<{ value: string; onChange: (v: string) => v
             </button>
           </div>
           <div style={{ padding: 16 }}>
-            <CodeEditor value={value} onChange={onChange} language="html" height={420} />
+            <HtmlToolbar editorRef={editorRef} onFormat={handleFormat} />
+            <CodeEditor ref={editorRef} value={value} onChange={onChange} language="html" height={420} />
           </div>
           <div style={{ padding: '10px 16px', borderTop: '1px solid var(--color-border)', display: 'flex', justifyContent: 'flex-end' }}>
             <button

craft/src/panels/right/styles/HtmlToolbar.test.tsx

@@ -0,0 +1,65 @@
+import { describe, test, expect, vi } from 'vitest';
+import React from 'react';
+import { createRoot, Root } from 'react-dom/client';
+import { act } from 'react-dom/test-utils';
+import { HtmlToolbar, SNIPPETS } from './HtmlToolbar';
+import type { CodeEditorHandle } from '../../../ui/CodeEditor';
+
+let container: HTMLDivElement;
+let root: Root;
+
+function render(ui: React.ReactElement) {
+  container = document.createElement('div');
+  document.body.appendChild(container);
+  act(() => {
+    root = createRoot(container);
+    root.render(ui);
+  });
+}
+
+function fakeHandle() {
+  return { insertAtCursor: vi.fn(), getValue: vi.fn(() => '') } as unknown as CodeEditorHandle;
+}
+
+describe('HtmlToolbar', () => {
+  test('every snippet button inserts its snippet with its caret offset', () => {
+    const handle = fakeHandle();
+    const ref = { current: handle } as React.RefObject<CodeEditorHandle>;
+    render(<HtmlToolbar editorRef={ref} onFormat={vi.fn()} />);
+
+    for (const snippet of SNIPPETS) {
+      const btn = container.querySelector(`[data-snippet="${snippet.label}"]`) as HTMLButtonElement;
+      expect(btn, `missing button for ${snippet.label}`).not.toBeNull();
+      act(() => { btn.click(); });
+      expect(handle.insertAtCursor).toHaveBeenCalledWith(snippet.text, snippet.caret);
+    }
+  });
+
+  test('the colour input inserts a style attribute at the caret', () => {
+    const handle = fakeHandle();
+    const ref = { current: handle } as React.RefObject<CodeEditorHandle>;
+    render(<HtmlToolbar editorRef={ref} onFormat={vi.fn()} />);
+
+    const colour = container.querySelector('input[type="color"]') as HTMLInputElement;
+    colour.value = '#ff8800';
+    act(() => { colour.dispatchEvent(new Event('input', { bubbles: true })); });
+
+    expect(handle.insertAtCursor).toHaveBeenCalledWith(' style="color: #ff8800"');
+  });
+
+  test('Format calls onFormat', () => {
+    const onFormat = vi.fn();
+    const ref = { current: fakeHandle() } as React.RefObject<CodeEditorHandle>;
+    render(<HtmlToolbar editorRef={ref} onFormat={onFormat} />);
+    const btn = container.querySelector('[data-action="format"]') as HTMLButtonElement;
+    act(() => { btn.click(); });
+    expect(onFormat).toHaveBeenCalledTimes(1);
+  });
+
+  test('a null editor ref is a no-op, not a crash', () => {
+    const ref = { current: null } as React.RefObject<CodeEditorHandle>;
+    render(<HtmlToolbar editorRef={ref} onFormat={vi.fn()} />);
+    const btn = container.querySelector('[data-snippet="div"]') as HTMLButtonElement;
+    expect(() => act(() => { btn.click(); })).not.toThrow();
+  });
+});

craft/src/panels/right/styles/HtmlToolbar.tsx

@@ -0,0 +1,92 @@
+import React from 'react';
+import type { CodeEditorHandle } from '../../../ui/CodeEditor';
+
+/**
+ * Snippet buttons for the Edit HTML modal. `caret` is the offset from the
+ * start of the inserted text where the caret should land -- i.e. between the
+ * open and close tags, so the next keystroke types content rather than
+ * landing after the closing tag.
+ */
+export const SNIPPETS: { label: string; icon: string; title: string; text: string; caret: number }[] = [
+  { label: 'div',     icon: 'fa-square-o',   title: 'Insert a div',        text: '<div></div>',   caret: 5 },
+  { label: 'section', icon: 'fa-window-maximize', title: 'Insert a section', text: '<section></section>', caret: 9 },
+  { label: 'h2',      icon: 'fa-header',     title: 'Insert a heading',    text: '<h2></h2>',     caret: 4 },
+  { label: 'p',       icon: 'fa-paragraph',  title: 'Insert a paragraph',  text: '<p></p>',       caret: 3 },
+  { label: 'a',       icon: 'fa-link',       title: 'Insert a link',       text: '<a href="#"></a>', caret: 12 },
+  { label: 'ul',      icon: 'fa-list-ul',    title: 'Insert a list',       text: '<ul>\n  <li></li>\n</ul>', caret: 11 },
+  { label: 'img',     icon: 'fa-image',      title: 'Insert an image',     text: '<img src="" alt="">', caret: 10 },
+];
+
+const btnStyle: React.CSSProperties = {
+  display: 'inline-flex', alignItems: 'center', justifyContent: 'center',
+  minWidth: 28, height: 28, padding: '0 7px',
+  background: '#27272a', color: '#e4e4e7',
+  border: '1px solid #3f3f46', borderRadius: 5,
+  fontSize: 11, cursor: 'pointer',
+};
+
+export const HtmlToolbar: React.FC<{
+  editorRef: React.RefObject<CodeEditorHandle>;
+  onFormat: () => void;
+}> = ({ editorRef, onFormat }) => {
+  const insert = (text: string, caret?: number): void => {
+    // The ref is null until CodeEditor mounts; clicking early must no-op.
+    // Only forward a second argument when a caret offset was actually
+    // given -- `insertAtCursor(text, undefined)` is a distinct call from
+    // `insertAtCursor(text)` (an explicit undefined still occupies the
+    // argument list), and the colour control relies on the latter so the
+    // caret lands at the end of the inserted attribute, not mid-string.
+    if (caret === undefined) {
+      editorRef.current?.insertAtCursor(text);
+    } else {
+      editorRef.current?.insertAtCursor(text, caret);
+    }
+  };
+
+  return (
+    <div
+      role="toolbar"
+      aria-label="HTML editing tools"
+      style={{ display: 'flex', flexWrap: 'wrap', gap: 5, marginBottom: 10, alignItems: 'center' }}
+    >
+      {SNIPPETS.map((s) => (
+        <button
+          key={s.label}
+          type="button"
+          data-snippet={s.label}
+          title={s.title}
+          aria-label={s.title}
+          style={btnStyle}
+          onClick={() => insert(s.text, s.caret)}
+        >
+          <i className={`fa ${s.icon}`} aria-hidden="true" />
+        </button>
+      ))}
+
+      <span style={{ width: 1, height: 20, background: '#3f3f46', margin: '0 3px' }} aria-hidden="true" />
+
+      <label
+        title="Insert a colour style attribute at the cursor"
+        style={{ ...btnStyle, padding: 0, overflow: 'hidden', position: 'relative' }}
+      >
+        <input
+          type="color"
+          aria-label="Insert colour"
+          defaultValue="#3b82f6"
+          onInput={(e) => insert(` style="color: ${(e.target as HTMLInputElement).value}"`)}
+          style={{ width: 40, height: 34, border: 'none', background: 'none', cursor: 'pointer', padding: 0 }}
+        />
+      </label>
+
+      <button
+        type="button"
+        data-action="format"
+        title="Re-indent the markup"
+        style={{ ...btnStyle, marginLeft: 'auto', fontWeight: 600, gap: 5 }}
+        onClick={onFormat}
+      >
+        <i className="fa fa-indent" aria-hidden="true" /> Format
+      </button>
+    </div>
+  );
+};