Function bufferLinesToText

frontend/app/view/term/termutil.ts:348–398

(buffer: TermTypes.IBuffer, startIndex: number, endIndex: number)

 * @returns Array of logical lines (with wrapped lines concatenated)
 */
export function bufferLinesToText(buffer: TermTypes.IBuffer, startIndex: number, endIndex: number): string[] {
    const lines: string[] = [];
    let currentLine = "";
    let isFirstLine = true;

    // Clamp indices to valid buffer range to avoid out-of-bounds access on the
    // underlying circular buffer, which could return stale/wrong data.
    const clampedStart = Math.max(0, Math.min(startIndex, buffer.length));
    const clampedEnd = Math.max(0, Math.min(endIndex, buffer.length));

    for (let i = clampedStart; i < clampedEnd; i++) {
        const line = buffer.getLine(i);
        if (line) {
            const lineText = line.translateToString(true);
            // If this line is wrapped (continuation of previous line), concatenate without newline
            if (line.isWrapped && !isFirstLine) {
                currentLine += lineText;
            } else {
                // This is a new logical line
                if (!isFirstLine) {
                    lines.push(currentLine);
                }
                currentLine = lineText;
                isFirstLine = false;
            }
        }
    }

    // Don't forget the last line
    if (!isFirstLine) {
        lines.push(currentLine);
    }

    // Trim trailing blank lines only when the requested range extends to the
    // actual end of the buffer.  A terminal allocates a fixed number of rows
    // (e.g. 80) but only the first few may contain real content; the rest are
    // empty placeholder rows.  We strip those so callers don't receive a wall
    // of empty strings.
    //
    // Crucially, if the caller requested a specific sub-range (e.g. lines
    // 100-150) and lines 140-150 happen to be blank, those blanks are
    // intentional and must NOT be removed.  We only trim when the range
    // reaches the very end of the buffer.
    if (clampedEnd >= buffer.length) {
        while (lines.length > 0 && lines[lines.length - 1] === "") {
            lines.pop();
        }
    }

    return lines;
}

export function quoteForPosixShell(filePath: string): string {
    return "'" + filePath.replace(/'/g, "'\\''") + "'";