snapshot of https://github.com/tldraw/tldraw.git (main, 2026-09-23; blobs > 131072B omitted)

packages/commenting/src/ui/comment-extensions.ts

@@ -0,0 +1,25 @@
+import { getTipTapDefaultExtensions, TLRichText, toRichText } from 'tldraw'
+
+/**
+ * tldraw's default rich-text extension set, minus headings — the deliberately limited set used for
+ * both the comment composer and comment display. Comments support paragraphs, bold, italic, lists,
+ * links, code, and highlight, but not headings. Built from tldraw's shared factory so the config
+ * stays in lockstep with the text shape's defaults rather than drifting from a copy.
+ */
+export const commentTipTapExtensions = getTipTapDefaultExtensions({ heading: false })
+
+/** An empty comment document — the seed value for a fresh composer and its post-submit reset. */
+export const EMPTY_COMMENT: TLRichText = toRichText('')
+
+/**
+ * Whether a rich-text comment body has no text. Mirrors tldraw's private `isEmptyRichText`: an
+ * empty doc can be encoded as an empty `content` array or a single empty paragraph.
+ */
+export function isCommentEmpty(richText: TLRichText): boolean {
+	if (richText.content.length === 0) return true
+	if (richText.content.length === 1) {
+		const node = richText.content[0] as any
+		if (!node.content || node.content.length === 0) return true
+	}
+	return false
+}