Revert "Block input to objects lying under already-hit hitcircles when classic note lock is active"

osu.Game.Rulesets.Osu.Tests/TestSceneLegacyHitPolicy.cs

@@ -506,6 +506,7 @@ public void TestAutopilotReducesHittableRange()
         }
 
         [Test]
+        [Ignore("Currently broken, first attempt at fixing broke even harder. See https://github.com/ppy/osu/issues/24743.")]
         public void TestInputDoesNotFallThroughOverlappingSliders()
         {
             const double time_first_slider = 1000;
@@ -549,12 +550,58 @@ public void TestInputDoesNotFallThroughOverlappingSliders()
             addJudgementOffsetAssert("first slider head", () => ((Slider)hitObjects[0]).HeadCircle, 0);
             addJudgementAssert(hitObjects[1], HitResult.Miss);
             // the slider head of the first slider prevents the second slider's head from being hit, so the judgement offset should be very late.
-            // this is not strictly done by the hit policy implementation itself (see `OsuModClassic.blockInputToUnderlyingObjects()`),
-            // but we're testing this here anyways to just keep everything related to input handling and note lock in one place.
             addJudgementOffsetAssert("second slider head", () => ((Slider)hitObjects[1]).HeadCircle, referenceHitWindows.WindowFor(HitResult.Meh));
             addClickActionAssert(0, ClickAction.Hit);
         }
 
+        [Test]
+        public void TestOverlappingObjectsDontBlockEachOtherWhenFullyFadedOut()
+        {
+            const double time_first_circle = 1000;
+            const double time_second_circle = 1200;
+            const double time_third_circle = 1400;
+            Vector2 positionFirstCircle = new Vector2(100);
+            Vector2 positionSecondCircle = new Vector2(200);
+
+            var hitObjects = new List<OsuHitObject>
+            {
+                new HitCircle
+                {
+                    StartTime = time_first_circle,
+                    Position = positionFirstCircle,
+                },
+                new HitCircle
+                {
+                    StartTime = time_second_circle,
+                    Position = positionSecondCircle,
+                },
+                new HitCircle
+                {
+                    StartTime = time_third_circle,
+                    Position = positionFirstCircle,
+                },
+            };
+
+            performTest(hitObjects, new List<ReplayFrame>
+            {
+                new OsuReplayFrame { Time = time_first_circle, Position = positionFirstCircle, Actions = { OsuAction.LeftButton } },
+                new OsuReplayFrame { Time = time_first_circle + 50, Position = positionFirstCircle },
+                new OsuReplayFrame { Time = time_second_circle, Position = positionSecondCircle, Actions = { OsuAction.LeftButton } },
+                new OsuReplayFrame { Time = time_second_circle + 50, Position = positionSecondCircle },
+                new OsuReplayFrame { Time = time_third_circle, Position = positionFirstCircle, Actions = { OsuAction.LeftButton } },
+                new OsuReplayFrame { Time = time_third_circle + 50, Position = positionFirstCircle },
+            });
+
+            addJudgementAssert(hitObjects[0], HitResult.Great);
+            addJudgementOffsetAssert(hitObjects[0], 0);
+
+            addJudgementAssert(hitObjects[1], HitResult.Great);
+            addJudgementOffsetAssert(hitObjects[1], 0);
+
+            addJudgementAssert(hitObjects[2], HitResult.Great);
+            addJudgementOffsetAssert(hitObjects[2], 0);
+        }
+
         private void addJudgementAssert(OsuHitObject hitObject, HitResult result)
         {
             AddAssert($"({hitObject.GetType().ReadableName()} @ {hitObject.StartTime}) judgement is {result}",

osu.Game.Rulesets.Osu/Mods/OsuModClassic.cs

@@ -74,10 +74,6 @@ public void ApplyToDrawableHitObject(DrawableHitObject obj)
                     head.TrackFollowCircle = !NoSliderHeadMovement.Value;
                     if (FadeHitCircleEarly.Value && !usingHiddenFading)
                         applyEarlyFading(head);
-
-                    if (ClassicNoteLock.Value)
-                        blockInputToUnderlyingObjects(head);
-
                     break;
 
                 case DrawableSliderTail tail:
@@ -87,29 +83,10 @@ public void ApplyToDrawableHitObject(DrawableHitObject obj)
                 case DrawableHitCircle circle:
                     if (FadeHitCircleEarly.Value && !usingHiddenFading)
                         applyEarlyFading(circle);
-
-                    if (ClassicNoteLock.Value)
-                        blockInputToUnderlyingObjects(circle);
-
                     break;
             }
         }
 
-        /// <summary>
-        /// On stable, hitcircles that have already been hit block input from reaching objects that may be underneath them.
-        /// The purpose of this method is to restore that behaviour.
-        /// In order to avoid introducing yet another confusing config option, this behaviour is roped into the general notion of "note lock".
-        /// </summary>
-        private static void blockInputToUnderlyingObjects(DrawableHitCircle circle)
-        {
-            var oldHitAction = circle.HitArea.Hit;
-            circle.HitArea.Hit = () =>
-            {
-                oldHitAction?.Invoke();
-                return true;
-            };
-        }
-
         private void applyEarlyFading(DrawableHitCircle circle)
         {
             circle.ApplyCustomUpdateState += (dho, state) =>

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableHitCircle.cs

@@ -261,7 +261,7 @@ public bool OnPressed(KeyBindingPressEvent<OsuAction> e)
                     case OsuAction.RightButton:
                         if (IsHovered && (Hit?.Invoke() ?? false))
                         {
-                            HitAction ??= e.Action;
+                            HitAction = e.Action;
                             return true;
                         }