findURLs method

Implementation

List<TextSpan> findURLs(
  String text,
  BuildContext context,
  TextStyle regularTextStyle,
) {
  final List<TextSpan> children = [];
  final RegExp exp = RegExp(
    r"((https?:www\.)|(https?:\/\/)|(www\.))[-a-zA-Z0-9@:%._\+~#=]{1,256}\.[a-zA-Z0-9]{1,6}(\/[-a-zA-Z0-9()@:%_\+.~#?&\/=]*)?",
  );
  final List<Match> matches = exp.allMatches(text).toList();

  int cursorPosition = 0;
  for (int i = 0; i < matches.length; i += 1) {
    final Match match = matches[i];
    final Uri url = Uri.parse(text.substring(match.start, match.end));
    children.add(
      TextSpan(
        text: text.substring(cursorPosition, match.start),
        style: regularTextStyle,
      ),
    );

    children.add(
      TextSpan(
        text: text.substring(match.start, match.end),
        style: TextStyle(color: Theme.of(context).colorScheme.secondary),
        recognizer: TapGestureRecognizer()
          ..onTap =
              () => launchUrl(url, mode: LaunchMode.externalApplication),
      ),
    );
    cursorPosition = match.end;
  }
  children.add(
    TextSpan(
      text: text.substring(cursorPosition, text.length),
      style: regularTextStyle,
    ),
  );

  return children;
}