snapshot of https://github.com/RocketChat/Rocket.Chat.git (develop, 2026-09-16; blobs > 131072B omitted)

apps/meteor/client/lib/toPlainTextRoot.ts

@@ -0,0 +1,27 @@
+import type { Root } from '@rocket.chat/message-parser';
+
+/**
+ * Builds a `Root` that renders `text` verbatim.
+ *
+ * Line breaks are not part of the text a renderer receives: the parser turns them into structure
+ * (one `PARAGRAPH` per line, a `LINE_BREAK` per blank line), and HTML collapses any `\n` left inside
+ * a text node. So messages that skip parsing (the ones past `MESSAGE_MAX_PARSE_LENGTH`) have to be
+ * mapped to the same structure, or they render as a single line.
+ */
+export const toPlainTextRoot = (text: string): Root => {
+	if (!text) {
+		return [];
+	}
+
+	// `marked` and `message-parser` both normalize line endings before parsing; without this a message
+	// pasted from Windows keeps a stray `\r` at the end of every line.
+	const lines = text.replace(/\r\n?/g, '\n').split('\n');
+
+	if (lines.length > 1 && lines[lines.length - 1] === '') {
+		lines.pop();
+	}
+
+	return lines.map((line) =>
+		line ? { type: 'PARAGRAPH', value: [{ type: 'PLAIN_TEXT', value: line }] } : { type: 'LINE_BREAK', value: undefined },
+	) as Root;
+};