String? _parseReferenceLinkLabel()

in lib/src/inline_parser.dart [1107:1138]

• 28 lines of code
• 10 McCabe index (conditional complexity)

  String? _parseReferenceLinkLabel(InlineParser parser) {
    // Walk past the opening `[`.
    parser.advanceBy(1);
    if (parser.isDone) return null;

    var buffer = StringBuffer();
    while (true) {
      var char = parser.charAt(parser.pos);
      if (char == $backslash) {
        parser.advanceBy(1);
        var next = parser.charAt(parser.pos);
        if (next != $backslash && next != $rbracket) {
          buffer.writeCharCode(char);
        }
        buffer.writeCharCode(next);
      } else if (char == $rbracket) {
        break;
      } else {
        buffer.writeCharCode(char);
      }
      parser.advanceBy(1);
      if (parser.isDone) return null;
      // TODO(srawlins): only check 999 characters, for performance reasons?
    }

    var label = buffer.toString();

    // A link label must contain at least one non-whitespace character.
    if (_entirelyWhitespacePattern.hasMatch(label)) return null;

    return label;
  }