private static CssComponent ParsePrelude(CssParser.Scope parser)
{
using (var componentsEnum = parser.ParseComponentList().GetEnumerator())
{
if (!componentsEnum.MoveNext())
{
return(CssComponent.Empty);
}
var firstComponent = componentsEnum.Current;
if (!componentsEnum.MoveNext())
{
return(firstComponent);
}
var components = ImmutableArray.CreateBuilder <CssComponent>();
components.Add(firstComponent);
do
{
components.Add(componentsEnum.Current);
} while (componentsEnum.MoveNext());
return(new CssCompositeComponent(components.ToImmutable()));
}
}
public virtual CssComponent ParseAtRulePrelude(CssParser.Scope parser)
{
return(ParsePrelude(parser));
}
public virtual IEnumerable <CssComponent> ParseAtRuleBlock(CssParser.Scope parser)
{
return(parser.ParseComponentList());
}
public override IEnumerable <CssComponent> ParseAtRuleBlock(CssParser.Scope parser)
{
return(parser.ParseDeclarationList());
}