parseManaCostString function

List<Widget>? parseManaCostString(String? manaCost, { EdgeInsets? padding = const EdgeInsets.symmetric(horizontal: 1.5), })

Parses a mana cost string and returns a list of widgets representing the mana symbols.

Example:

List<Widget>? symbols = parseManaCostString('{3}{W}{U}');

Returns null if the input string is null or doesn't contain any valid MTG symbols.

Implementation

List<Widget>? parseManaCostString(
  String? manaCost, {
  EdgeInsets? padding = const EdgeInsets.symmetric(horizontal: 1.5),
}) {
  if (manaCost == null) {
    return null;
  }

  Iterable<RegExpMatch> matches = MTGSymbol.regex.allMatches(manaCost);
  if (matches.isEmpty) {
    return null;
  }

  List<Widget> manaCostSymbols = <Widget>[];
  for (RegExpMatch match in matches) {
    String? matchedSymbol = match.group(0);
    final MTGSymbol? mtgSymbol = mtgSymbology[matchedSymbol];
    if (mtgSymbol == null) {
      throw ArgumentError.value(
        matchedSymbol,
        'matchedSymbol',
        'Unexpected MTG symbol',
      );
    }
    SvgPicture svg = mtgSymbol.toSvg();
    manaCostSymbols.add(
      padding == null ? svg : Padding(padding: padding, child: svg),
    );
  }
  return manaCostSymbols;
}