HexColorTerm _parseHex()

in lib/parser.dart [2715:2743]

• 24 lines of code
• 12 McCabe index (conditional complexity)

  HexColorTerm _parseHex(String hexText, SourceSpan span) {
    var hexValue = 0;

    for (var i = 0; i < hexText.length; i++) {
      var digit = _hexDigit(hexText.codeUnitAt(i));
      if (digit < 0) {
        _warning('Bad hex number', span);
        return HexColorTerm(BAD_HEX_VALUE(), hexText, span);
      }
      hexValue = (hexValue << 4) + digit;
    }

    // Make 3 character hex value #RRGGBB => #RGB iff:
    // high/low nibble of RR is the same, high/low nibble of GG is the same and
    // high/low nibble of BB is the same.
    if (hexText.length == 6 &&
        hexText[0] == hexText[1] &&
        hexText[2] == hexText[3] &&
        hexText[4] == hexText[5]) {
      hexText = '${hexText[0]}${hexText[2]}${hexText[4]}';
    } else if (hexText.length == 4 &&
        hexText[0] == hexText[1] &&
        hexText[2] == hexText[3]) {
      hexText = '${hexText[0]}${hexText[2]}';
    } else if (hexText.length == 2 && hexText[0] == hexText[1]) {
      hexText = '${hexText[0]}';
    }
    return HexColorTerm(hexValue, hexText, span);
  }