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Viewing file:     matchrecursive.js (7.79 KB)      -rw-r--r--

"use strict";

var _interopRequireDefault = require("@babel/runtime-corejs3/helpers/interopRequireDefault");

var _Object$defineProperty = require("@babel/runtime-corejs3/core-js-stable/object/define-property");

_Object$defineProperty(exports, "__esModule", {
  value: true
});

exports["default"] = void 0;

var _slice = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/instance/slice"));

var _concat = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/instance/concat"));

var _includes = _interopRequireDefault(require("@babel/runtime-corejs3/core-js-stable/instance/includes"));

/*!
 * XRegExp.matchRecursive 4.4.1
 * <xregexp.com>
 * Steven Levithan (c) 2009-present MIT License
 */
var _default = function _default(XRegExp) {
  /**
   * Returns a match detail object composed of the provided values.
   *
   * @private
   */
  function row(name, value, start, end) {
    return {
      name: name,
      value: value,
      start: start,
      end: end
    };
  }
  /**
   * Returns an array of match strings between outermost left and right delimiters, or an array of
   * objects with detailed match parts and position data. An error is thrown if delimiters are
   * unbalanced within the data.
   *
   * @memberOf XRegExp
   * @param {String} str String to search.
   * @param {String} left Left delimiter as an XRegExp pattern.
   * @param {String} right Right delimiter as an XRegExp pattern.
   * @param {String} [flags] Any native or XRegExp flags, used for the left and right delimiters.
   * @param {Object} [options] Lets you specify `valueNames` and `escapeChar` options.
   * @returns {!Array} Array of matches, or an empty array.
   * @example
   *
   * // Basic usage
   * let str = '(t((e))s)t()(ing)';
   * XRegExp.matchRecursive(str, '\\(', '\\)', 'g');
   * // -> ['t((e))s', '', 'ing']
   *
   * // Extended information mode with valueNames
   * str = 'Here is <div> <div>an</div></div> example';
   * XRegExp.matchRecursive(str, '<div\\s*>', '</div>', 'gi', {
   *   valueNames: ['between', 'left', 'match', 'right']
   * });
   * // -> [
   * // {name: 'between', value: 'Here is ',       start: 0,  end: 8},
   * // {name: 'left',    value: '<div>',          start: 8,  end: 13},
   * // {name: 'match',   value: ' <div>an</div>', start: 13, end: 27},
   * // {name: 'right',   value: '</div>',         start: 27, end: 33},
   * // {name: 'between', value: ' example',       start: 33, end: 41}
   * // ]
   *
   * // Omitting unneeded parts with null valueNames, and using escapeChar
   * str = '...{1}.\\{{function(x,y){return {y:x}}}';
   * XRegExp.matchRecursive(str, '{', '}', 'g', {
   *   valueNames: ['literal', null, 'value', null],
   *   escapeChar: '\\'
   * });
   * // -> [
   * // {name: 'literal', value: '...',  start: 0, end: 3},
   * // {name: 'value',   value: '1',    start: 4, end: 5},
   * // {name: 'literal', value: '.\\{', start: 6, end: 9},
   * // {name: 'value',   value: 'function(x,y){return {y:x}}', start: 10, end: 37}
   * // ]
   *
   * // Sticky mode via flag y
   * str = '<1><<<2>>><3>4<5>';
   * XRegExp.matchRecursive(str, '<', '>', 'gy');
   * // -> ['1', '<<2>>', '3']
   */


  XRegExp.matchRecursive = function (str, left, right, flags, options) {
    flags = flags || '';
    options = options || {};
    var global = (0, _includes["default"])(flags).call(flags, 'g');
    var sticky = (0, _includes["default"])(flags).call(flags, 'y'); // Flag `y` is controlled internally

    var basicFlags = flags.replace(/y/g, '');
    var _options = options,
        escapeChar = _options.escapeChar;
    var vN = options.valueNames;
    var output = [];
    var openTokens = 0;
    var delimStart = 0;
    var delimEnd = 0;
    var lastOuterEnd = 0;
    var outerStart;
    var innerStart;
    var leftMatch;
    var rightMatch;
    var esc;
    left = XRegExp(left, basicFlags);
    right = XRegExp(right, basicFlags);

    if (escapeChar) {
      var _context, _context2;

      if (escapeChar.length > 1) {
        throw new Error('Cannot use more than one escape character');
      }

      escapeChar = XRegExp.escape(escapeChar); // Example of concatenated `esc` regex:
      // `escapeChar`: '%'
      // `left`: '<'
      // `right`: '>'
      // Regex is: /(?:%[\S\s]|(?:(?!<|>)[^%])+)+/

      esc = new RegExp((0, _concat["default"])(_context = (0, _concat["default"])(_context2 = "(?:".concat(escapeChar, "[\\S\\s]|(?:(?!")).call(_context2, // Using `XRegExp.union` safely rewrites backreferences in `left` and `right`.
      // Intentionally not passing `basicFlags` to `XRegExp.union` since any syntax
      // transformation resulting from those flags was already applied to `left` and
      // `right` when they were passed through the XRegExp constructor above.
      XRegExp.union([left, right], '', {
        conjunction: 'or'
      }).source, ")[^")).call(_context, escapeChar, "])+)+"), // Flags `gy` not needed here
      flags.replace(/[^imu]+/g, ''));
    }

    while (true) {
      // If using an escape character, advance to the delimiter's next starting position,
      // skipping any escaped characters in between
      if (escapeChar) {
        delimEnd += (XRegExp.exec(str, esc, delimEnd, 'sticky') || [''])[0].length;
      }

      leftMatch = XRegExp.exec(str, left, delimEnd);
      rightMatch = XRegExp.exec(str, right, delimEnd); // Keep the leftmost match only

      if (leftMatch && rightMatch) {
        if (leftMatch.index <= rightMatch.index) {
          rightMatch = null;
        } else {
          leftMatch = null;
        }
      } // Paths (LM: leftMatch, RM: rightMatch, OT: openTokens):
      // LM | RM | OT | Result
      // 1  | 0  | 1  | loop
      // 1  | 0  | 0  | loop
      // 0  | 1  | 1  | loop
      // 0  | 1  | 0  | throw
      // 0  | 0  | 1  | throw
      // 0  | 0  | 0  | break
      // The paths above don't include the sticky mode special case. The loop ends after the
      // first completed match if not `global`.


      if (leftMatch || rightMatch) {
        delimStart = (leftMatch || rightMatch).index;
        delimEnd = delimStart + (leftMatch || rightMatch)[0].length;
      } else if (!openTokens) {
        break;
      }

      if (sticky && !openTokens && delimStart > lastOuterEnd) {
        break;
      }

      if (leftMatch) {
        if (!openTokens) {
          outerStart = delimStart;
          innerStart = delimEnd;
        }

        ++openTokens;
      } else if (rightMatch && openTokens) {
        if (! --openTokens) {
          if (vN) {
            if (vN[0] && outerStart > lastOuterEnd) {
              output.push(row(vN[0], (0, _slice["default"])(str).call(str, lastOuterEnd, outerStart), lastOuterEnd, outerStart));
            }

            if (vN[1]) {
              output.push(row(vN[1], (0, _slice["default"])(str).call(str, outerStart, innerStart), outerStart, innerStart));
            }

            if (vN[2]) {
              output.push(row(vN[2], (0, _slice["default"])(str).call(str, innerStart, delimStart), innerStart, delimStart));
            }

            if (vN[3]) {
              output.push(row(vN[3], (0, _slice["default"])(str).call(str, delimStart, delimEnd), delimStart, delimEnd));
            }
          } else {
            output.push((0, _slice["default"])(str).call(str, innerStart, delimStart));
          }

          lastOuterEnd = delimEnd;

          if (!global) {
            break;
          }
        }
      } else {
        throw new Error('Unbalanced delimiter found in string');
      } // If the delimiter matched an empty string, avoid an infinite loop


      if (delimStart === delimEnd) {
        ++delimEnd;
      }
    }

    if (global && !sticky && vN && vN[0] && str.length > lastOuterEnd) {
      output.push(row(vN[0], (0, _slice["default"])(str).call(str, lastOuterEnd), lastOuterEnd, str.length));
    }

    return output;
  };
};

exports["default"] = _default;
module.exports = exports.default;