Method #updatePositionForRegion

xml/_tokenizer.ts:636–653

* Update position tracking for a region of text using indexOf for newlines. * This is more efficient than char-by-char for regions with sparse newlines.

(buffer: string, start: number, end: number)

   * This is more efficient than char-by-char for regions with sparse newlines.
   */
  #updatePositionForRegion(buffer: string, start: number, end: number): void {
    if (!this.#trackPosition) return;

    let pos = start;
    while (pos < end) {
      const nlIdx = buffer.indexOf("\n", pos);
      if (nlIdx === -1 || nlIdx >= end) {
        // No more newlines in region
        this.#column += end - pos;
        break;
      }
      // Found a newline
      this.#line++;
      this.#column = 1;
      pos = nlIdx + 1;
    }
    this.#offset += end - start;
  }

  #normalizeLineEndings(chunk: string): string {
    const version = this.#xml11 ? "1.1" : "1.0";