hyperformula/es/parser/CellReferenceMatcher.mjs

HyperFormula is a JavaScript engine for efficient processing of spreadsheet-like data and formulas

/**
 * @license
 * Copyright (c) 2025 Handsoncode. All rights reserved.
 */
import { ABSOLUTE_OPERATOR, ALL_DIGITS_ARRAY, ALL_UNICODE_LETTERS_ARRAY, CELL_REFERENCE_WITH_NEXT_CHARACTER_PATTERN } from "./parser-consts.mjs";
/**
 * Helper class for recognizing CellReference token in text
 */
export class CellReferenceMatcher {
  constructor() {
    this.POSSIBLE_START_CHARACTERS = [...ALL_UNICODE_LETTERS_ARRAY, ...ALL_DIGITS_ARRAY, ABSOLUTE_OPERATOR, "'", '_'];
    this.cellReferenceRegexp = new RegExp(CELL_REFERENCE_WITH_NEXT_CHARACTER_PATTERN, 'y');
  }
  /**
   * Method used by the lexer to recognize CellReference token in text
   *
   * Note: using 'y' sticky flag for a named expression which is not supported on IE11...
   * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/sticky
   */
  match(text, startOffset) {
    this.cellReferenceRegexp.lastIndex = startOffset;
    const execResult = this.cellReferenceRegexp.exec(text + '@');
    if (execResult == null || execResult[1] == null) {
      return null;
    }
    execResult[0] = execResult[1];
    return execResult;
  }
}