From 2438c20d63e8aa9ad3eb0d6a09a99a11e03bbc13 Mon Sep 17 00:00:00 2001
From: Dean Herbert <pe@ppy.sh>
Date: Wed, 9 Jun 2021 17:56:07 +0900
Subject: [PATCH] Fix `SourceChanged` not being correctly forwarded through
 `LegacySkinTransformer`

---
 osu.Game/Skinning/LegacySkinTransformer.cs  | 4 ++--
 osu.Game/Skinning/SkinProvidingContainer.cs | 6 ++++++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/osu.Game/Skinning/LegacySkinTransformer.cs b/osu.Game/Skinning/LegacySkinTransformer.cs
index 651fdddb1b..613b0218f2 100644
--- a/osu.Game/Skinning/LegacySkinTransformer.cs
+++ b/osu.Game/Skinning/LegacySkinTransformer.cs
@@ -53,8 +53,8 @@ namespace osu.Game.Skinning
 
         public event Action SourceChanged
         {
-            add { throw new NotSupportedException(); }
-            remove { }
+            add => Source.SourceChanged += value;
+            remove => Source.SourceChanged -= value;
         }
     }
 }
diff --git a/osu.Game/Skinning/SkinProvidingContainer.cs b/osu.Game/Skinning/SkinProvidingContainer.cs
index 5e91a280e7..b1929aac6f 100644
--- a/osu.Game/Skinning/SkinProvidingContainer.cs
+++ b/osu.Game/Skinning/SkinProvidingContainer.cs
@@ -46,6 +46,9 @@ namespace osu.Game.Skinning
             RelativeSizeAxes = Axes.Both;
 
             noFallbackLookupProxy = new NoFallbackProxy(this);
+
+            if (skin is ISkinSource source)
+                source.SourceChanged += TriggerSourceChanged;
         }
 
         public ISkin FindProvider(Func<ISkin, bool> lookupFunction)
@@ -168,6 +171,9 @@ namespace osu.Game.Skinning
 
             if (fallbackSource != null)
                 fallbackSource.SourceChanged -= TriggerSourceChanged;
+
+            if (skin is ISkinSource source)
+                source.SourceChanged -= TriggerSourceChanged;
         }
 
         private class NoFallbackProxy : ISkinSource