void FillMediaList(MediaList list, CssTokenType end, ref CssToken token) { _nodes.Push(list); if (token.Type != end) { while (token.Type != CssTokenType.EndOfFile) { var medium = CreateMedium(ref token); if (medium != null) { list.AppendChild(medium); } if (token.Type != CssTokenType.Comma) { break; } token = NextToken(); CollectTrivia(ref token); } if (token.Type != end || list.Length == 0) { list.Clear(); list.AppendChild(new CssMedium { IsInverse = true, Type = Keywords.All }); } } _nodes.Pop(); }