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feat(pages): add a table of contents to the page side panel #249
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| import { useEditorState, type Editor } from '@tiptap/react'; | ||
|
|
||
| interface Props { | ||
| editor: Editor | null; | ||
| } | ||
|
|
||
| interface Heading { | ||
| level: number; | ||
| text: string; | ||
| pos: number; | ||
| } | ||
|
|
||
| function readHeadings(editor: Editor | null): Heading[] { | ||
| if (!editor) return []; | ||
| const out: Heading[] = []; | ||
| editor.state.doc.descendants((node, pos) => { | ||
| if (node.type.name === 'heading') { | ||
| out.push({ level: node.attrs.level as number, text: node.textContent, pos }); | ||
| } | ||
| return true; | ||
| }); | ||
| return out; | ||
| } | ||
|
|
||
| function sameHeadings(a: Heading[], b: Heading[] | null): boolean { | ||
| if (!b || a.length !== b.length) return false; | ||
| return a.every((h, i) => h.level === b[i].level && h.text === b[i].text && h.pos === b[i].pos); | ||
| } | ||
|
|
||
| /** | ||
| * Table of contents derived from the editor's headings. Clicking an entry moves | ||
| * the caret to that heading and scrolls it into view. | ||
| */ | ||
| export function PageOutline({ editor }: Props) { | ||
| const headings = | ||
| useEditorState({ | ||
| editor, | ||
| selector: (snapshot) => readHeadings(snapshot.editor), | ||
| equalityFn: sameHeadings, | ||
| }) ?? []; | ||
|
|
||
| if (headings.length === 0) { | ||
| return ( | ||
| <p className="px-2 py-3 text-xs text-(--txt-tertiary)"> | ||
| Headings you add to the page show up here. | ||
| </p> | ||
| ); | ||
| } | ||
|
|
||
| const minLevel = Math.min(...headings.map((h) => h.level)); | ||
|
|
||
| const goTo = (pos: number) => { | ||
| editor | ||
| ?.chain() | ||
| .focus() | ||
| .setTextSelection(pos + 1) | ||
| .scrollIntoView() | ||
| .run(); | ||
| }; | ||
|
|
||
| return ( | ||
| <nav aria-label="Page outline" className="p-1"> | ||
| <ul className="space-y-0.5"> | ||
| {headings.map((h, i) => { | ||
| const label = h.text.trim() || 'Untitled heading'; | ||
| return ( | ||
| <li key={`${h.pos}-${i}`}> | ||
| <button | ||
| type="button" | ||
| onClick={() => goTo(h.pos)} | ||
| style={{ paddingLeft: `${(h.level - minLevel) * 12 + 8}px` }} | ||
| className="block w-full truncate rounded py-1 pr-2 text-left text-xs text-(--txt-secondary) hover:bg-(--bg-layer-1-hover) hover:text-(--txt-primary)" | ||
| title={label} | ||
| > | ||
| {label} | ||
| </button> | ||
| </li> | ||
| ); | ||
| })} | ||
| </ul> | ||
| </nav> | ||
| ); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,4 +1,5 @@ | ||
| export { usePageEditor, type UsePageEditorOptions } from './usePageEditor'; | ||
| export { PageEditorToolbar } from './PageEditorToolbar'; | ||
| export { PageEditorContent } from './PageEditorContent'; | ||
| export { PageOutline } from './PageOutline'; | ||
| export { EmojiLogoPicker, type PageLogo } from './EmojiLogoPicker'; |
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