RegExp properties not applying when adding more than one annotation

[ibrahimEltayfe]

Hi, I'm encountering an issue when using multiple annotations when specifying multiLine or unicode or any other properties in the RegExp . I'm using the following regex patterns to detect hashtags and mentions in text:

final RegExp hashtagTextRegex = RegExp(
    r'#([\p{L}\p{N}_]+)',
    multiLine: true,
    unicode: true
);

final RegExp mentionTextRegex = RegExp(
    r'@([\p{L}\p{N}_]+)',
    multiLine: true,
    unicode: true
);

the problem is when using these two annotations, multiLine and unicode is not applying, maybe the problem is in this method _mergeRegexPatterns

  RegExp? _mergeRegexPatterns(List<Annotation>? annotations) {
    if (annotations == null || annotations.isEmpty) {
      return null;
    } else if (annotations.length == 1) {
      return annotations[0].regExp;
    }

    // replacing groups '(' => to non capturing groups '(?:'
    return RegExp(
      annotations
          .map(
            (a) =>
                '(${a.regExp.pattern.replaceAll(_nonCapturingGroupPattern, '(?:')})',
          )
          .join('|'),
    );
  }

when merging annotations, it does not apply the other properties of the regex.

[aalboghdadi]

@ibrahimEltayfe did you manage to solve it?

[maRci002]

Can you please test if this helps or not?

RegExp? _mergeRegexPatterns(List<Annotation>? annotations) {
  if (annotations == null || annotations.isEmpty) {
    return null;
  } else if (annotations.length == 1) {
    return annotations[0].regExp;
  }

  bool hasMultiline = false;
  bool hasUnicode = false;

  for (final annotation in annotations) {
    if (annotation.regExp.isMultiLine) {
      hasMultiline = true;
    }
    if (annotation.regExp.isUnicode) {
      hasUnicode = true;
    }
  }

  // replacing groups '(' => to non capturing groups '(?:'
  return RegExp(
    annotations
        .map(
          (a) =>
              '(${a.regExp.pattern.replaceAll(_nonCapturingGroupPattern, '(?:')})',
        )
        .join('|'),
    multiLine: hasMultiline,
    unicode: hasUnicode,
  );
}