diff --git a/osu.Game/Screens/Select/Carousel/CarouselGroup.cs b/osu.Game/Screens/Select/Carousel/CarouselGroup.cs index 8d141b6f72..9302578038 100644 --- a/osu.Game/Screens/Select/Carousel/CarouselGroup.cs +++ b/osu.Game/Screens/Select/Carousel/CarouselGroup.cs @@ -2,7 +2,6 @@ // See the LICENCE file in the repository root for full licence text. using System.Collections.Generic; -using System.Linq; namespace osu.Game.Screens.Select.Carousel { @@ -15,7 +14,7 @@ namespace osu.Game.Screens.Select.Carousel public IReadOnlyList Items => items; - private List items = new List(); + private readonly List items = new List(); /// /// Used to assign a monotonically increasing ID to items as they are added. This member is @@ -24,9 +23,6 @@ namespace osu.Game.Screens.Select.Carousel private ulong currentItemID; private Comparer? criteriaComparer; - - private static readonly Comparer item_id_comparer = Comparer.Create((x, y) => x.ItemID.CompareTo(y.ItemID)); - private FilterCriteria? lastCriteria; protected int GetIndexOfItem(CarouselItem lastSelected) => items.IndexOf(lastSelected); @@ -90,9 +86,16 @@ namespace osu.Game.Screens.Select.Carousel items.ForEach(c => c.Filter(criteria)); - // IEnumerable.OrderBy() is used instead of List.Sort() to ensure sorting stability - criteriaComparer = Comparer.Create((x, y) => x.CompareTo(criteria, y)); - items = items.OrderBy(c => c, criteriaComparer).ThenBy(c => c, item_id_comparer).ToList(); + criteriaComparer = Comparer.Create((x, y) => + { + int comparison = x.CompareTo(criteria, y); + if (comparison != 0) + return comparison; + + return x.ItemID.CompareTo(y.ItemID); + }); + + items.Sort(criteriaComparer); lastCriteria = criteria; }