List processMarginsDeclarations()

in lib/parser.dart [1215:1298]
65 lines of code
28 McCabe index (conditional complexity)

  List<DeclarationGroup> processMarginsDeclarations() {
    var groups = <DeclarationGroup>[];

    var start = _peekToken.span;

    _eat(TokenKind.LBRACE);

    var decls = <Declaration>[];
    var dartStyles =
        <DartStyleExpression>[]; // List of latest styles exposed to Dart.

    do {
      switch (_peek()) {
        case TokenKind.MARGIN_DIRECTIVE_TOPLEFTCORNER:
        case TokenKind.MARGIN_DIRECTIVE_TOPLEFT:
        case TokenKind.MARGIN_DIRECTIVE_TOPCENTER:
        case TokenKind.MARGIN_DIRECTIVE_TOPRIGHT:
        case TokenKind.MARGIN_DIRECTIVE_TOPRIGHTCORNER:
        case TokenKind.MARGIN_DIRECTIVE_BOTTOMLEFTCORNER:
        case TokenKind.MARGIN_DIRECTIVE_BOTTOMLEFT:
        case TokenKind.MARGIN_DIRECTIVE_BOTTOMCENTER:
        case TokenKind.MARGIN_DIRECTIVE_BOTTOMRIGHT:
        case TokenKind.MARGIN_DIRECTIVE_BOTTOMRIGHTCORNER:
        case TokenKind.MARGIN_DIRECTIVE_LEFTTOP:
        case TokenKind.MARGIN_DIRECTIVE_LEFTMIDDLE:
        case TokenKind.MARGIN_DIRECTIVE_LEFTBOTTOM:
        case TokenKind.MARGIN_DIRECTIVE_RIGHTTOP:
        case TokenKind.MARGIN_DIRECTIVE_RIGHTMIDDLE:
        case TokenKind.MARGIN_DIRECTIVE_RIGHTBOTTOM:
          // Margin syms processed.
          //   margin :
          //      margin_sym S* '{' declaration [ ';' S* declaration? ]* '}' S*
          //
          //      margin_sym : @top-left-corner, @top-left, @bottom-left, etc.
          var marginSym = _peek();

          _next();

          var declGroup = processDeclarations();
          groups.add(
              MarginGroup(marginSym, declGroup.declarations, _makeSpan(start)));
          break;
        default:
          var decl = processDeclaration(dartStyles);
          if (decl != null) {
            if (decl.hasDartStyle) {
              var newDartStyle = decl.dartStyle!;

              // Replace or add latest Dart style.
              var replaced = false;
              for (var i = 0; i < dartStyles.length; i++) {
                var dartStyle = dartStyles[i];
                if (dartStyle.isSame(newDartStyle)) {
                  dartStyles[i] = newDartStyle;
                  replaced = true;
                  break;
                }
              }
              if (!replaced) {
                dartStyles.add(newDartStyle);
              }
            }
            decls.add(decl);
          }
          _maybeEat(TokenKind.SEMICOLON);
          break;
      }
    } while (!_maybeEat(TokenKind.RBRACE) && !isPrematureEndOfFile());

    // Fixup declaration to only have dartStyle that are live for this set of
    // declarations.
    for (var decl in decls) {
      if (decl.hasDartStyle && !dartStyles.contains(decl.dartStyle)) {
        // Dart style not live, ignore these styles in this Declarations.
        decl.dartStyle = null;
      }
    }

    if (decls.isNotEmpty) {
      groups.add(DeclarationGroup(decls, _makeSpan(start)));
    }

    return groups;
  }