parseOracleTextString function

TextSpan? parseOracleTextString(String? oracleText)

Parses an OracleText string and returns a TextSpan with embedded mana symbols and other MTG symbols.

Example:

TextSpan? span = parseOracleTextString('Add {W} or {U}, then {T} to untap.');

Returns null if the input string is null.

Implementation

TextSpan? parseOracleTextString(String? oracleText) {
  if (oracleText == null) {
    return null;
  }

  Iterable<RegExpMatch> matches = MTGSymbol.regex.allMatches(oracleText);
  if (matches.isEmpty) {
    return TextSpan(text: oracleText);
  }

  final List<InlineSpan> children = [];
  int lastIndex = 0;
  for (RegExpMatch match in matches) {
    children.add(TextSpan(text: oracleText.substring(lastIndex, match.start)));
    String? matchedSymbol = match.group(0);
    final MTGSymbol? mtgSymbol = mtgSymbology[matchedSymbol];
    if (mtgSymbol == null) {
      throw ArgumentError.value(
        matchedSymbol,
        'matchedSymbol',
        'Unexpected MTG symbol',
      );
    }
    children.add(
      WidgetSpan(child: mtgSymbol.toSvg(height: 14.0)),
    ); // Smaller for inline text
    lastIndex = match.end;
  }
  children.add(TextSpan(text: oracleText.substring(lastIndex)));
  return TextSpan(children: children);
}