TextSpan markdown2TextSpan(String markdownText) {
  final spans = <TextSpan>[];
  final buffer = StringBuffer();

  int asteriskCount = 0;
  bool isItalic = false;
  bool isBold = false;

  for (int i = 0; i < markdownText.length; i++) {
    final char = markdownText[i];

    if ("*" == char) {
      if (asteriskCount < 2) {
        asteriskCount++;
        continue;
      }

      buffer.write(char);
      continue;
    }

    if (asteriskCount > 0) {
      if (buffer.isNotEmpty) {
        spans.add(_buildTextSpan(buffer.toString(), isItalic, isBold));
      }

      if (1 ==  asteriskCount) isItalic = !isItalic;
      if (2 ==  asteriskCount) isBold = !isBold;

      buffer.clear();
      asteriskCount = 0;
    }

    buffer.write(char);
  }

  if (buffer.isNotEmpty) {
    spans.add(_buildTextSpan(buffer.toString(), isItalic, isBold));
  }

  return TextSpan(children: spans);
}