Function wrapSingleLine

packages/pi-tui/src/utils.ts:745–824

(line: string, width: number)

}

function wrapSingleLine(line: string, width: number): string[] {
	if (!line) {
		return [""];
	}

	const visibleLength = visibleWidth(line);
	if (visibleLength <= width) {
		return [line];
	}

	const wrapped: string[] = [];
	const tracker = new AnsiCodeTracker();
	const tokens = splitIntoTokensWithAnsi(line);

	let currentLine = "";
	let currentVisibleLength = 0;

	for (const token of tokens) {
		const tokenVisibleLength = visibleWidth(token);
		const isWhitespace = token.trim() === "";

		// Token itself is too long - break it character by character
		if (tokenVisibleLength > width && !isWhitespace) {
			if (currentLine) {
				// Add specific reset for underline only (preserves background)
				const lineEndReset = tracker.getLineEndReset();
				if (lineEndReset) {
					currentLine += lineEndReset;
				}
				wrapped.push(currentLine);
				currentLine = "";
				currentVisibleLength = 0;
			}

			// Break long token - breakLongWord handles its own resets
			const broken = breakLongWord(token, width, tracker);
			for (let i = 0; i < broken.length - 1; i++) {
				wrapped.push(broken[i]!);
			}
			currentLine = broken[broken.length - 1]!;
			currentVisibleLength = visibleWidth(currentLine);
			continue;
		}

		// Check if adding this token would exceed width
		const totalNeeded = currentVisibleLength + tokenVisibleLength;

		if (totalNeeded > width && currentVisibleLength > 0) {
			// Trim trailing whitespace, then add underline reset (not full reset, to preserve background)
			let lineToWrap = currentLine.trimEnd();
			const lineEndReset = tracker.getLineEndReset();
			if (lineEndReset) {
				lineToWrap += lineEndReset;
			}
			wrapped.push(lineToWrap);
			if (isWhitespace) {
				// Don't start new line with whitespace
				currentLine = tracker.getActiveCodes();