Function breakLongWord

packages/pi-tui/src/utils.ts:842–909

(word: string, width: number, tracker: AnsiCodeTracker)

}

function breakLongWord(word: string, width: number, tracker: AnsiCodeTracker): string[] {
	const lines: string[] = [];
	let currentLine = tracker.getActiveCodes();
	let currentWidth = 0;

	// First, separate ANSI codes from visible content
	// We need to handle ANSI codes specially since they're not graphemes
	let i = 0;
	const segments: Array<{ type: "ansi" | "grapheme"; value: string }> = [];

	while (i < word.length) {
		const ansiResult = extractAnsiCode(word, i);
		if (ansiResult) {
			segments.push({ type: "ansi", value: ansiResult.code });
			i += ansiResult.length;
		} else {
			// Find the next ANSI code or end of string
			let end = i;
			while (end < word.length) {
				const nextAnsi = extractAnsiCode(word, end);
				if (nextAnsi) break;
				end++;
			}
			// Segment this non-ANSI portion into graphemes
			const textPortion = word.slice(i, end);
			for (const seg of graphemeSegmenter.segment(textPortion)) {
				segments.push({ type: "grapheme", value: seg.segment });
			}
			i = end;
		}
	}

	// Now process segments
	for (const seg of segments) {
		if (seg.type === "ansi") {
			currentLine += seg.value;
			tracker.process(seg.value);
			continue;
		}

		const grapheme = seg.value;
		// Skip empty graphemes to avoid issues with string-width calculation
		if (!grapheme) continue;

		const graphemeWidth = visibleWidth(grapheme);

		if (currentWidth + graphemeWidth > width) {
			// Add specific reset for underline only (preserves background)
			const lineEndReset = tracker.getLineEndReset();
			if (lineEndReset) {
				currentLine += lineEndReset;
			}
			lines.push(currentLine);
			currentLine = tracker.getActiveCodes();
			currentWidth = 0;
		}

		currentLine += grapheme;