Add IEquatable and ToString support to SkinComponentsContainerLookup

osu.Game/Skinning/SkinComponentsContainerLookup.cs

@@ -1,6 +1,9 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
+using System.ComponentModel;
+using osu.Framework.Extensions;
 using osu.Game.Rulesets;
 
 namespace osu.Game.Skinning
@@ -8,7 +11,7 @@ namespace osu.Game.Skinning
     /// <summary>
     /// Represents a lookup of a collection of elements that make up a particular skinnable <see cref="TargetArea"/> of the game.
     /// </summary>
-    public class SkinComponentsContainerLookup : ISkinComponentLookup
+    public class SkinComponentsContainerLookup : ISkinComponentLookup, IEquatable<SkinComponentsContainerLookup>
     {
         /// <summary>
         /// The target area / layer of the game for which skin components will be returned.
@@ -25,12 +28,44 @@ namespace osu.Game.Skinning
             Ruleset = ruleset;
         }
 
+        public override string ToString()
+        {
+            if (Ruleset == null) return Target.GetDescription();
+
+            return $"{Target.GetDescription()} (\"{Ruleset.Name}\" only)";
+        }
+
+        public bool Equals(SkinComponentsContainerLookup? other)
+        {
+            if (ReferenceEquals(null, other)) return false;
+            if (ReferenceEquals(this, other)) return true;
+
+            return Target == other.Target && (ReferenceEquals(Ruleset, other.Ruleset) || Ruleset?.Equals(other.Ruleset) == true);
+        }
+
+        public override bool Equals(object? obj)
+        {
+            if (ReferenceEquals(null, obj)) return false;
+            if (ReferenceEquals(this, obj)) return true;
+            if (obj.GetType() != GetType()) return false;
+
+            return Equals((SkinComponentsContainerLookup)obj);
+        }
+
+        public override int GetHashCode()
+        {
+            return HashCode.Combine((int)Target, Ruleset);
+        }
+
         /// <summary>
         /// Represents a particular area or part of a game screen whose layout can be customised using the skin editor.
         /// </summary>
         public enum TargetArea
         {
+            [Description("HUD")]
             MainHUDComponents,
+
+            [Description("Song select")]
             SongSelect
         }
     }