Function offsetToLogicalPos

packages/cli/src/ui/components/shared/text-buffer.ts:598–645

(
  text: string,
  offset: number,
)

}

export function offsetToLogicalPos(
  text: string,
  offset: number,
): [number, number] {
  let row = 0;
  let col = 0;
  let currentOffset = 0;

  if (offset === 0) return [0, 0];

  const lines = text.split('\n');
  for (let i = 0; i < lines.length; i++) {
    const line = lines[i];
    const lineLength = cpLen(line);
    const lineLengthWithNewline = lineLength + (i < lines.length - 1 ? 1 : 0);

    if (offset <= currentOffset + lineLength) {
      // Check against lineLength first
      row = i;
      col = offset - currentOffset;
      return [row, col];
    } else if (offset <= currentOffset + lineLengthWithNewline) {
      // Check if offset is the newline itself
      row = i;
      col = lineLength; // Position cursor at the end of the current line content
      // If the offset IS the newline, and it's not the last line, advance to next line, col 0
      if (
        offset === currentOffset + lineLengthWithNewline &&
        i < lines.length - 1
      ) {
        return [i + 1, 0];
      }
      return [row, col]; // Otherwise, it's at the end of the current line content
    }
    currentOffset += lineLengthWithNewline;
  }

  // If offset is beyond the text length, place cursor at the end of the last line
  // or [0,0] if text is empty
  if (lines.length > 0) {
    row = lines.length - 1;
    col = cpLen(lines[row]);
  } else {
    row = 0;
    col = 0;
  }
  return [row, col];
}

/**
 * Converts logical row/col position to absolute text offset