Function sliceVisibleColumns

src/replay/test/progress.ts:302–318

(value: string, columns: number)

}

function sliceVisibleColumns(value: string, columns: number): string {
  if (columns <= 0) return '';
  let visibleColumns = 0;
  let output = '';
  for (let index = 0; index < value.length && visibleColumns < columns; ) {
    const ansi = readAnsiEscapeAt(value, index);
    if (ansi) {
      output += ansi;
      index += ansi.length;
      continue;
    }
    output += value[index];
    index += 1;
    visibleColumns += 1;
  }
  return output;
}

function readAnsiEscapeAt(value: string, index: number): string | null {
  if (!value.startsWith(ANSI_ESCAPE_PREFIX, index)) return null;