From d1fa391d251e0d67a02b2c8eb68e1b777567c257 Mon Sep 17 00:00:00 2001
From: smoogipoo <smoogipoo@smgi.me>
Date: Thu, 5 Nov 2020 16:12:55 +0900
Subject: [PATCH] Make OsuModHidden apply fadein adjustment on custom state
 update

---
 osu.Game.Rulesets.Osu/Mods/OsuModHidden.cs | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/osu.Game.Rulesets.Osu/Mods/OsuModHidden.cs b/osu.Game.Rulesets.Osu/Mods/OsuModHidden.cs
index db5fbb0dd6..025e202666 100644
--- a/osu.Game.Rulesets.Osu/Mods/OsuModHidden.cs
+++ b/osu.Game.Rulesets.Osu/Mods/OsuModHidden.cs
@@ -3,7 +3,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Linq;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Objects;
@@ -27,18 +26,20 @@ namespace osu.Game.Rulesets.Osu.Mods
 
         public override void ApplyToDrawableHitObjects(IEnumerable<DrawableHitObject> drawables)
         {
-            static void adjustFadeIn(OsuHitObject h) => h.TimeFadeIn = h.TimePreempt * fade_in_duration_multiplier;
-
-            foreach (var d in drawables.OfType<DrawableOsuHitObject>())
-            {
-                adjustFadeIn(d.HitObject);
-                foreach (var h in d.HitObject.NestedHitObjects.OfType<OsuHitObject>())
-                    adjustFadeIn(h);
-            }
+            foreach (var d in drawables)
+                d.ApplyCustomUpdateState += applyFadeInAdjustment;
 
             base.ApplyToDrawableHitObjects(drawables);
         }
 
+        private void applyFadeInAdjustment(DrawableHitObject hitObject, ArmedState state)
+        {
+            if (!(hitObject is DrawableOsuHitObject d))
+                return;
+
+            d.HitObject.TimeFadeIn = d.HitObject.TimePreempt * fade_in_duration_multiplier;
+        }
+
         private double lastSliderHeadFadeOutStartTime;
         private double lastSliderHeadFadeOutDuration;