getDetections method

List<Detection> getDetections(String copiedText)

Return the list of decorations with tagged and untagged text

Implementation

List<Detection> getDetections(String copiedText) {
  /// Text to change emoji into replacement text
  final fullWidthRegExp = RegExp(
      r'(\u00a9|\u00ae|[\u2000-\u3300]|\ud83c[\ud000-\udfff]|\ud83d[\ud000-\udfff]|\ud83e[\ud000-\udfff])');

  final fullWidthRegExpMatches =
      fullWidthRegExp.allMatches(copiedText).toList();
  final tokenRegExp =
      RegExp(r'[・ぁ-んーァ-ヶ一-龥\u1100-\u11FF\uAC00-\uD7A3０-９ａ-ｚＡ-Ｚ　]');
  final emojiMatches = fullWidthRegExpMatches
      .where((match) => (!tokenRegExp
          .hasMatch(copiedText.substring(match.start, match.end))))
      .toList();

  /// This is to avoid the error caused by 'regExp' which counts the emoji's length 1.
  emojiMatches.forEach((emojiMatch) {
    final emojiLength = emojiMatch.group(0)!.length;
    final replacementText = "a" * emojiLength;
    copiedText = copiedText.replaceRange(
        emojiMatch.start, emojiMatch.end, replacementText);
  });

  final tags = detectionRegExp.allMatches(copiedText).toList();
  if (tags.isEmpty) {
    return [];
  }

  final sourceDetections = _getSourceDetections(tags, copiedText);

  final emojiFilteredResult = _getEmojiFilteredDetections(
      copiedText: copiedText,
      emojiMatches: emojiMatches,
      source: sourceDetections);

  return emojiFilteredResult;
}