Function truncatePathMiddle

src/utils/truncate.ts:16–56

(path: string, maxLength: number)

 * @returns The truncated path, or original if it fits within maxLength
 */
export function truncatePathMiddle(path: string, maxLength: number): string {
  // No truncation needed
  if (stringWidth(path) <= maxLength) {
    return path
  }

  // Handle edge case of very small or non-positive maxLength
  if (maxLength <= 0) {
    return '…'
  }

  // Need at least room for "…" + something meaningful
  if (maxLength < 5) {
    return truncateToWidth(path, maxLength)
  }

  // Find the filename (last path segment)
  const lastSlash = path.lastIndexOf('/')
  // Include the leading slash in filename for display
  const filename = lastSlash >= 0 ? path.slice(lastSlash) : path
  const directory = lastSlash >= 0 ? path.slice(0, lastSlash) : ''
  const filenameWidth = stringWidth(filename)

  // If filename alone is too long, truncate from start
  if (filenameWidth >= maxLength - 1) {
    return truncateStartToWidth(path, maxLength)
  }

  // Calculate space available for directory prefix
  // Result format: directory + "…" + filename
  const availableForDir = maxLength - 1 - filenameWidth // -1 for ellipsis

  if (availableForDir <= 0) {
    // No room for directory, just show filename (truncated if needed)
    return truncateStartToWidth(filename, maxLength)
  }

  // Truncate directory and combine
  const truncatedDir = truncateToWidthNoEllipsis(directory, availableForDir)
  return truncatedDir + '…' + filename
}

/**
 * Truncates a string to fit within a maximum display width, measured in terminal columns.