Merge pull request #12717 from frenzibyte/player-loader-star-rating

Add star rating to the beatmap metadata in player loading screen

.github/ISSUE_TEMPLATE/01-bug-issues.md

@@ -25,6 +25,6 @@ Please check:
 *please attach logs here, which are located at:*
 - `%AppData%/osu/logs` *(on Windows),*
 - `~/.local/share/osu/logs` *(on Linux & macOS).*
-- `Android/Data/sh.ppy.osulazer/logs` *(on Android)*,
+- `Android/data/sh.ppy.osulazer/files/logs` *(on Android)*,
 - on iOS they can be obtained by connecting your device to your desktop and copying the `logs` directory from the app's own document storage using iTunes. (https://support.apple.com/en-us/HT201301#copy-to-computer)
 -->

.github/dependabot.yml

@@ -0,0 +1,46 @@
+version: 2
+updates:
+- package-ecosystem: nuget
+  directory: "/"
+  schedule:
+    interval: monthly
+    time: "17:00"
+  open-pull-requests-limit: 99
+  ignore:
+  - dependency-name: Microsoft.EntityFrameworkCore.Design
+    versions:
+    - "> 2.2.6"
+  - dependency-name: Microsoft.EntityFrameworkCore.Sqlite
+    versions:
+    - "> 2.2.6"
+  - dependency-name: Microsoft.EntityFrameworkCore.Sqlite.Core
+    versions:
+    - "> 2.2.6"
+  - dependency-name: Microsoft.Extensions.DependencyInjection
+    versions:
+    - ">= 5.a, < 6"
+  - dependency-name: NUnit3TestAdapter
+    versions:
+    - ">= 3.16.a, < 3.17"
+  - dependency-name: Microsoft.NET.Test.Sdk
+    versions:
+    - 16.9.1
+  - dependency-name: Microsoft.Extensions.DependencyInjection
+    versions:
+    - 3.1.11
+    - 3.1.12
+  - dependency-name: Microsoft.AspNetCore.SignalR.Protocols.NewtonsoftJson
+    versions:
+    - 3.1.11
+  - dependency-name: Microsoft.NETCore.Targets
+    versions:
+    - 5.0.0
+  - dependency-name: Microsoft.AspNetCore.SignalR.Protocols.MessagePack
+    versions:
+    - 5.0.2
+  - dependency-name: NUnit
+    versions:
+    - 3.13.1
+  - dependency-name: Microsoft.AspNetCore.SignalR.Client
+    versions:
+    - 3.1.11

.idea/.idea.osu.Desktop/.idea/indexLayout.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ContentModelUserStore">
+  <component name="UserContentModel">
     <attachedFolders />
     <explicitIncludes />
     <explicitExcludes />

.idea/.idea.osu.Desktop/.idea/modules.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<project version="4">
-  <component name="ProjectModuleManager">
-    <modules>
-      <module fileurl="file://$PROJECT_DIR$/.idea/.idea.osu.Desktop/.idea/riderModule.iml" filepath="$PROJECT_DIR$/.idea/.idea.osu.Desktop/.idea/riderModule.iml" />
-    </modules>
-  </component>
-</project>

CONTRIBUTING.md

@@ -24,7 +24,7 @@ Issues, bug reports and feature suggestions are welcomed, though please keep in
   * the in-game logs, which are located at:
     * `%AppData%/osu/logs` (on Windows),
     * `~/.local/share/osu/logs` (on Linux and macOS),
-    * `Android/Data/sh.ppy.osulazer/logs` (on Android),
+    * `Android/data/sh.ppy.osulazer/files/logs` (on Android),
     * on iOS they can be obtained by connecting your device to your desktop and [copying the `logs` directory from the app's own document storage using iTunes](https://support.apple.com/en-us/HT201301#copy-to-computer),
   * your system specifications (including the operating system and platform you are playing on),
   * a reproduction scenario (list of steps you have performed leading up to the occurrence of the bug),

README.md

@@ -17,7 +17,7 @@ The future of [osu!](https://osu.ppy.sh) and the beginning of an open era! Commo
 
 This project is under heavy development, but is in a stable state. Users are encouraged to try it out and keep it installed alongside the stable *osu!* client. It will continue to evolve to the point of eventually replacing the existing stable client as an update.
 
-**IMPORTANT:** Gameplay mechanics (and other features which you may have come to know and love) are in a constant state of flux. Game balance and final quality-of-life passses come at the end of development, preceeded by experimentation and changes which may potentially **reduce playability or usability**. This is done in order to allow us to move forward as developers and designers more efficiently. If this offends you, please consider sticking to the stable releases of osu! (found on the website). We are not yet open to heated discussion over game mechanics and will not be using github as a forum for such discussions just yet.
+**IMPORTANT:** Gameplay mechanics (and other features which you may have come to know and love) are in a constant state of flux. Game balance and final quality-of-life passes come at the end of development, preceded by experimentation and changes which may potentially **reduce playability or usability**. This is done in order to allow us to move forward as developers and designers more efficiently. If this offends you, please consider sticking to the stable releases of osu! (found on the website). We are not yet open to heated discussion over game mechanics and will not be using github as a forum for such discussions just yet.
 
 We are accepting bug reports (please report with as much detail as possible and follow the existing issue templates). Feature requests are also welcome, but understand that our focus is on completing the game to feature parity before adding new features. A few resources are available as starting points to getting involved and understanding the project:
 

Templates/Rulesets/ruleset-empty/osu.Game.Rulesets.EmptyFreeform.Tests/osu.Game.Rulesets.EmptyFreeform.Tests.csproj

@@ -11,7 +11,7 @@
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
-    <PackageReference Include="NUnit" Version="3.13.1" />
+    <PackageReference Include="NUnit" Version="3.13.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
   </ItemGroup>

Templates/Rulesets/ruleset-empty/osu.Game.Rulesets.EmptyFreeform/Replays/EmptyFreeformAutoGenerator.cs

@@ -1,28 +1,22 @@
 // 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.Collections.Generic;
 using osu.Game.Beatmaps;
-using osu.Game.Replays;
 using osu.Game.Rulesets.EmptyFreeform.Objects;
 using osu.Game.Rulesets.Replays;
 
 namespace osu.Game.Rulesets.EmptyFreeform.Replays
 {
-    public class EmptyFreeformAutoGenerator : AutoGenerator
+    public class EmptyFreeformAutoGenerator : AutoGenerator<EmptyFreeformReplayFrame>
     {
-        protected Replay Replay;
-        protected List<ReplayFrame> Frames => Replay.Frames;
-
         public new Beatmap<EmptyFreeformHitObject> Beatmap => (Beatmap<EmptyFreeformHitObject>)base.Beatmap;
 
         public EmptyFreeformAutoGenerator(IBeatmap beatmap)
             : base(beatmap)
         {
-            Replay = new Replay();
         }
 
-        public override Replay Generate()
+        protected override void GenerateFrames()
         {
             Frames.Add(new EmptyFreeformReplayFrame());
 
@@ -35,8 +29,6 @@ namespace osu.Game.Rulesets.EmptyFreeform.Replays
                     // todo: add required inputs and extra frames.
                 });
             }
-
-            return Replay;
         }
     }
 }

Templates/Rulesets/ruleset-empty/osu.Game.Rulesets.EmptyFreeform/Replays/EmptyFreeformFramedReplayInputHandler.cs

@@ -2,13 +2,11 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Linq;
 using osu.Framework.Input.StateChanges;
 using osu.Framework.Utils;
 using osu.Game.Replays;
 using osu.Game.Rulesets.Replays;
-using osuTK;
 
 namespace osu.Game.Rulesets.EmptyFreeform.Replays
 {
@@ -21,26 +19,13 @@ namespace osu.Game.Rulesets.EmptyFreeform.Replays
 
         protected override bool IsImportant(EmptyFreeformReplayFrame frame) => frame.Actions.Any();
 
-        protected Vector2 Position
-        {
-            get
-            {
-                var frame = CurrentFrame;
-
-                if (frame == null)
-                    return Vector2.Zero;
-
-                Debug.Assert(CurrentTime != null);
-
-                return Interpolation.ValueAt(CurrentTime.Value, frame.Position, NextFrame.Position, frame.Time, NextFrame.Time);
-            }
-        }
-
         public override void CollectPendingInputs(List<IInput> inputs)
         {
+            var position = Interpolation.ValueAt(CurrentTime, StartFrame.Position, EndFrame.Position, StartFrame.Time, EndFrame.Time);
+
             inputs.Add(new MousePositionAbsoluteInput
             {
-                Position = GamefieldToScreenSpace(Position),
+                Position = GamefieldToScreenSpace(position),
             });
             inputs.Add(new ReplayState<EmptyFreeformAction>
             {

Templates/Rulesets/ruleset-example/osu.Game.Rulesets.Pippidon.Tests/osu.Game.Rulesets.Pippidon.Tests.csproj

@@ -11,7 +11,7 @@
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
-    <PackageReference Include="NUnit" Version="3.13.1" />
+    <PackageReference Include="NUnit" Version="3.13.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
   </ItemGroup>

Templates/Rulesets/ruleset-example/osu.Game.Rulesets.Pippidon/Replays/PippidonAutoGenerator.cs

@@ -1,28 +1,22 @@
 // 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.Collections.Generic;
 using osu.Game.Beatmaps;
-using osu.Game.Replays;
 using osu.Game.Rulesets.Pippidon.Objects;
 using osu.Game.Rulesets.Replays;
 
 namespace osu.Game.Rulesets.Pippidon.Replays
 {
-    public class PippidonAutoGenerator : AutoGenerator
+    public class PippidonAutoGenerator : AutoGenerator<PippidonReplayFrame>
     {
-        protected Replay Replay;
-        protected List<ReplayFrame> Frames => Replay.Frames;
-
         public new Beatmap<PippidonHitObject> Beatmap => (Beatmap<PippidonHitObject>)base.Beatmap;
 
         public PippidonAutoGenerator(IBeatmap beatmap)
             : base(beatmap)
         {
-            Replay = new Replay();
         }
 
-        public override Replay Generate()
+        protected override void GenerateFrames()
         {
             Frames.Add(new PippidonReplayFrame());
 
@@ -34,8 +28,6 @@ namespace osu.Game.Rulesets.Pippidon.Replays
                     Position = hitObject.Position,
                 });
             }
-
-            return Replay;
         }
     }
 }

Templates/Rulesets/ruleset-example/osu.Game.Rulesets.Pippidon/Replays/PippidonFramedReplayInputHandler.cs

@@ -2,12 +2,10 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Collections.Generic;
-using System.Diagnostics;
 using osu.Framework.Input.StateChanges;
 using osu.Framework.Utils;
 using osu.Game.Replays;
 using osu.Game.Rulesets.Replays;
-using osuTK;
 
 namespace osu.Game.Rulesets.Pippidon.Replays
 {
@@ -20,26 +18,13 @@ namespace osu.Game.Rulesets.Pippidon.Replays
 
         protected override bool IsImportant(PippidonReplayFrame frame) => true;
 
-        protected Vector2 Position
-        {
-            get
-            {
-                var frame = CurrentFrame;
-
-                if (frame == null)
-                    return Vector2.Zero;
-
-                Debug.Assert(CurrentTime != null);
-
-                return NextFrame != null ? Interpolation.ValueAt(CurrentTime.Value, frame.Position, NextFrame.Position, frame.Time, NextFrame.Time) : frame.Position;
-            }
-        }
-
         public override void CollectPendingInputs(List<IInput> inputs)
         {
+            var position = Interpolation.ValueAt(CurrentTime, StartFrame.Position, EndFrame.Position, StartFrame.Time, EndFrame.Time);
+
             inputs.Add(new MousePositionAbsoluteInput
             {
-                Position = GamefieldToScreenSpace(Position)
+                Position = GamefieldToScreenSpace(position)
             });
         }
     }

Templates/Rulesets/ruleset-scrolling-empty/osu.Game.Rulesets.EmptyScrolling.Tests/osu.Game.Rulesets.EmptyScrolling.Tests.csproj

@@ -11,7 +11,7 @@
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
-    <PackageReference Include="NUnit" Version="3.13.1" />
+    <PackageReference Include="NUnit" Version="3.13.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
   </ItemGroup>

Templates/Rulesets/ruleset-scrolling-empty/osu.Game.Rulesets.EmptyScrolling/Replays/EmptyScrollingAutoGenerator.cs

@@ -1,28 +1,22 @@
 // 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.Collections.Generic;
 using osu.Game.Beatmaps;
-using osu.Game.Replays;
 using osu.Game.Rulesets.EmptyScrolling.Objects;
 using osu.Game.Rulesets.Replays;
 
 namespace osu.Game.Rulesets.EmptyScrolling.Replays
 {
-    public class EmptyScrollingAutoGenerator : AutoGenerator
+    public class EmptyScrollingAutoGenerator : AutoGenerator<EmptyScrollingReplayFrame>
     {
-        protected Replay Replay;
-        protected List<ReplayFrame> Frames => Replay.Frames;
-
         public new Beatmap<EmptyScrollingHitObject> Beatmap => (Beatmap<EmptyScrollingHitObject>)base.Beatmap;
 
         public EmptyScrollingAutoGenerator(IBeatmap beatmap)
             : base(beatmap)
         {
-            Replay = new Replay();
         }
 
-        public override Replay Generate()
+        protected override void GenerateFrames()
         {
             Frames.Add(new EmptyScrollingReplayFrame());
 
@@ -34,8 +28,6 @@ namespace osu.Game.Rulesets.EmptyScrolling.Replays
                     // todo: add required inputs and extra frames.
                 });
             }
-
-            return Replay;
         }
     }
 }

Templates/Rulesets/ruleset-scrolling-example/osu.Game.Rulesets.Pippidon.Tests/osu.Game.Rulesets.Pippidon.Tests.csproj

@@ -11,7 +11,7 @@
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
-    <PackageReference Include="NUnit" Version="3.13.1" />
+    <PackageReference Include="NUnit" Version="3.13.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
   </ItemGroup>

Templates/Rulesets/ruleset-scrolling-example/osu.Game.Rulesets.Pippidon/Replays/PippidonAutoGenerator.cs

@@ -2,29 +2,23 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
-using System.Collections.Generic;
 using osu.Game.Beatmaps;
-using osu.Game.Replays;
 using osu.Game.Rulesets.Pippidon.Objects;
 using osu.Game.Rulesets.Pippidon.UI;
 using osu.Game.Rulesets.Replays;
 
 namespace osu.Game.Rulesets.Pippidon.Replays
 {
-    public class PippidonAutoGenerator : AutoGenerator
+    public class PippidonAutoGenerator : AutoGenerator<PippidonReplayFrame>
     {
-        protected Replay Replay;
-        protected List<ReplayFrame> Frames => Replay.Frames;
-
         public new Beatmap<PippidonHitObject> Beatmap => (Beatmap<PippidonHitObject>)base.Beatmap;
 
         public PippidonAutoGenerator(IBeatmap beatmap)
             : base(beatmap)
         {
-            Replay = new Replay();
         }
 
-        public override Replay Generate()
+        protected override void GenerateFrames()
         {
             int currentLane = 0;
 
@@ -55,8 +49,6 @@ namespace osu.Game.Rulesets.Pippidon.Replays
 
                 currentLane = hitObject.Lane;
             }
-
-            return Replay;
         }
 
         private void addFrame(double time, PippidonAction direction)

osu.Android.props

@@ -51,7 +51,7 @@
     <Reference Include="Java.Interop" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="ppy.osu.Game.Resources" Version="2021.211.1" />
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2021.402.0" />
+    <PackageReference Include="ppy.osu.Game.Resources" Version="2021.422.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2021.513.0" />
   </ItemGroup>
 </Project>

osu.Android/OsuGameAndroid.cs

@@ -7,6 +7,8 @@ using Android.OS;
 using osu.Framework.Allocation;
 using osu.Game;
 using osu.Game.Updater;
+using osu.Game.Utils;
+using Xamarin.Essentials;
 
 namespace osu.Android
 {
@@ -72,5 +74,14 @@ namespace osu.Android
         }
 
         protected override UpdateManager CreateUpdateManager() => new SimpleUpdateManager();
+
+        protected override BatteryInfo CreateBatteryInfo() => new AndroidBatteryInfo();
+
+        private class AndroidBatteryInfo : BatteryInfo
+        {
+            public override double ChargeLevel => Battery.ChargeLevel;
+
+            public override bool IsCharging => Battery.PowerSource != BatteryPowerSource.Battery;
+        }
     }
 }

osu.Android/Properties/AndroidManifest.xml

@@ -6,5 +6,6 @@
 	<uses-permission android:name="android.permission.WAKE_LOCK" />
 	<uses-permission android:name="android.permission.READ_FRAME_BUFFER" />
 	<uses-permission android:name="android.permission.INTERNET" />
+	<uses-permission android:name="android.permission.BATTERY_STATS" />
 	<application android:allowBackup="true" android:supportsRtl="true" android:label="osu!" android:icon="@drawable/lazer" />
 </manifest>

osu.Android/osu.Android.csproj

@@ -63,5 +63,8 @@
       <Version>5.0.0</Version>
     </PackageReference>
   </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Xamarin.Essentials" Version="1.6.1" />
+  </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
 </Project>

osu.Desktop.slnf

@@ -24,7 +24,7 @@
       "Templates\\Rulesets\\ruleset-scrolling-empty\\osu.Game.Rulesets.EmptyScrolling\\osu.Game.Rulesets.EmptyScrolling.csproj",
       "Templates\\Rulesets\\ruleset-scrolling-empty\\osu.Game.Rulesets.EmptyScrolling.Tests\\osu.Game.Rulesets.EmptyScrolling.Tests.csproj",
       "Templates\\Rulesets\\ruleset-scrolling-example\\osu.Game.Rulesets.Pippidon\\osu.Game.Rulesets.Pippidon.csproj",
-      "Templates\\Rulesets\\ruleset-scrolling-example\\osu.Game.Rulesets.Pippidon.Tests\\osu.Game.Rulesets.Pippidon.Tests.csproj",
+      "Templates\\Rulesets\\ruleset-scrolling-example\\osu.Game.Rulesets.Pippidon.Tests\\osu.Game.Rulesets.Pippidon.Tests.csproj"
     ]
   }
-}
+}

osu.Desktop/OsuGameDesktop.cs

@@ -9,6 +9,7 @@ using System.Reflection;
 using System.Runtime.Versioning;
 using System.Threading.Tasks;
 using Microsoft.Win32;
+using osu.Desktop.Security;
 using osu.Desktop.Overlays;
 using osu.Framework.Platform;
 using osu.Game;
@@ -113,6 +114,8 @@ namespace osu.Desktop
 
             if (RuntimeInfo.OS == RuntimeInfo.Platform.Windows)
                 LoadComponentAsync(new GameplayWinKeyBlocker(), Add);
+
+            LoadComponentAsync(new ElevatedPrivilegesChecker(), Add);
         }
 
         protected override void ScreenChanged(IScreen lastScreen, IScreen newScreen)

osu.Desktop/Program.cs

@@ -69,7 +69,6 @@ namespace osu.Desktop
         /// Allow a maximum of one unhandled exception, per second of execution.
         /// </summary>
         /// <param name="arg"></param>
-        /// <returns></returns>
         private static bool handleException(Exception arg)
         {
             bool continueExecution = Interlocked.Decrement(ref allowableExceptions) >= 0;

osu.Desktop/Security/ElevatedPrivilegesChecker.cs

@@ -0,0 +1,83 @@
+// 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.Security.Principal;
+using osu.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Graphics;
+using osu.Game.Overlays;
+using osu.Game.Overlays.Notifications;
+
+namespace osu.Desktop.Security
+{
+    /// <summary>
+    /// Checks if the game is running with elevated privileges (as admin in Windows, root in Unix) and displays a warning notification if so.
+    /// </summary>
+    public class ElevatedPrivilegesChecker : Component
+    {
+        [Resolved]
+        private NotificationOverlay notifications { get; set; }
+
+        private bool elevated;
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            elevated = checkElevated();
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            if (elevated)
+                notifications.Post(new ElevatedPrivilegesNotification());
+        }
+
+        private bool checkElevated()
+        {
+            try
+            {
+                switch (RuntimeInfo.OS)
+                {
+                    case RuntimeInfo.Platform.Windows:
+                        if (!OperatingSystem.IsWindows()) return false;
+
+                        var windowsIdentity = WindowsIdentity.GetCurrent();
+                        var windowsPrincipal = new WindowsPrincipal(windowsIdentity);
+
+                        return windowsPrincipal.IsInRole(WindowsBuiltInRole.Administrator);
+
+                    case RuntimeInfo.Platform.macOS:
+                    case RuntimeInfo.Platform.Linux:
+                        return Mono.Unix.Native.Syscall.geteuid() == 0;
+                }
+            }
+            catch
+            {
+            }
+
+            return false;
+        }
+
+        private class ElevatedPrivilegesNotification : SimpleNotification
+        {
+            public override bool IsImportant => true;
+
+            public ElevatedPrivilegesNotification()
+            {
+                Text = $"Running osu! as {(RuntimeInfo.IsUnix ? "root" : "administrator")} does not improve performance, may break integrations and poses a security risk. Please run the game as a normal user.";
+            }
+
+            [BackgroundDependencyLoader]
+            private void load(OsuColour colours, NotificationOverlay notificationOverlay)
+            {
+                Icon = FontAwesome.Solid.ShieldAlt;
+                IconBackgound.Colour = colours.YellowDark;
+            }
+        }
+    }
+}

osu.Desktop/osu.Desktop.csproj

@@ -25,6 +25,7 @@
   </ItemGroup>
   <ItemGroup Label="Package References">
     <PackageReference Include="Microsoft.NETCore.Targets" Version="5.0.0" />
+    <PackageReference Include="Mono.Posix.NETStandard" Version="1.0.0" />
     <PackageReference Include="System.IO.Packaging" Version="5.0.0" />
     <PackageReference Include="ppy.squirrel.windows" Version="1.9.0.5" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.2.6" />

osu.Game.Benchmarks/osu.Game.Benchmarks.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="BenchmarkDotNet" Version="0.12.1" />
-    <PackageReference Include="nunit" Version="3.13.1" />
+    <PackageReference Include="nunit" Version="3.13.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
   </ItemGroup>
 

osu.Game.Rulesets.Catch.Tests/TestSceneCatchReplay.cs

@@ -0,0 +1,53 @@
+// 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 NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Catch.Objects;
+using osu.Game.Rulesets.Catch.UI;
+
+namespace osu.Game.Rulesets.Catch.Tests
+{
+    public class TestSceneCatchReplay : TestSceneCatchPlayer
+    {
+        protected override bool Autoplay => true;
+
+        private const int object_count = 10;
+
+        [Test]
+        public void TestReplayCatcherPositionIsFramePerfect()
+        {
+            AddUntilStep("caught all fruits", () => Player.ScoreProcessor.Combo.Value == object_count);
+        }
+
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset)
+        {
+            var beatmap = new Beatmap
+            {
+                BeatmapInfo =
+                {
+                    Ruleset = ruleset,
+                }
+            };
+
+            beatmap.ControlPointInfo.Add(0, new TimingControlPoint());
+
+            for (int i = 0; i < object_count / 2; i++)
+            {
+                beatmap.HitObjects.Add(new Fruit
+                {
+                    StartTime = (i + 1) * 1000,
+                    X = 0
+                });
+                beatmap.HitObjects.Add(new Fruit
+                {
+                    StartTime = (i + 1) * 1000 + 1,
+                    X = CatchPlayfield.WIDTH
+                });
+            }
+
+            return beatmap;
+        }
+    }
+}

osu.Game.Rulesets.Catch.Tests/TestSceneCatcher.cs

@@ -10,6 +10,7 @@ using osu.Game.Rulesets.Catch.UI;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Testing;
+using osu.Framework.Utils;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Configuration;
@@ -20,6 +21,7 @@ using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Skinning;
 using osu.Game.Tests.Visual;
+using osuTK;
 
 namespace osu.Game.Rulesets.Catch.Tests
 {
@@ -170,16 +172,25 @@ namespace osu.Game.Rulesets.Catch.Tests
         }
 
         [Test]
-        public void TestCatcherStacking()
+        public void TestCatcherRandomStacking()
+        {
+            AddStep("catch more fruits", () => attemptCatch(() => new Fruit
+            {
+                X = (RNG.NextSingle() - 0.5f) * Catcher.CalculateCatchWidth(Vector2.One)
+            }, 50));
+        }
+
+        [Test]
+        public void TestCatcherStackingSameCaughtPosition()
         {
             AddStep("catch fruit", () => attemptCatch(new Fruit()));
             checkPlate(1);
-            AddStep("catch more fruits", () => attemptCatch(new Fruit(), 9));
+            AddStep("catch more fruits", () => attemptCatch(() => new Fruit(), 9));
             checkPlate(10);
             AddAssert("caught objects are stacked", () =>
-                catcher.CaughtObjects.All(obj => obj.Y <= 0) &&
-                catcher.CaughtObjects.Any(obj => obj.Y == 0) &&
-                catcher.CaughtObjects.Any(obj => obj.Y < -20));
+                catcher.CaughtObjects.All(obj => obj.Y <= Catcher.CAUGHT_FRUIT_VERTICAL_OFFSET) &&
+                catcher.CaughtObjects.Any(obj => obj.Y == Catcher.CAUGHT_FRUIT_VERTICAL_OFFSET) &&
+                catcher.CaughtObjects.Any(obj => obj.Y < -25));
         }
 
         [Test]
@@ -189,11 +200,11 @@ namespace osu.Game.Rulesets.Catch.Tests
             AddStep("catch tiny droplet", () => attemptCatch(new TinyDroplet()));
             AddAssert("tiny droplet is exploded", () => catcher.CaughtObjects.Count() == 1 && droppedObjectContainer.Count == 1);
             AddUntilStep("wait explosion", () => !droppedObjectContainer.Any());
-            AddStep("catch more fruits", () => attemptCatch(new Fruit(), 9));
+            AddStep("catch more fruits", () => attemptCatch(() => new Fruit(), 9));
             AddStep("explode", () => catcher.Explode());
             AddAssert("fruits are exploded", () => !catcher.CaughtObjects.Any() && droppedObjectContainer.Count == 10);
             AddUntilStep("wait explosion", () => !droppedObjectContainer.Any());
-            AddStep("catch fruits", () => attemptCatch(new Fruit(), 10));
+            AddStep("catch fruits", () => attemptCatch(() => new Fruit(), 10));
             AddStep("drop", () => catcher.Drop());
             AddAssert("fruits are dropped", () => !catcher.CaughtObjects.Any() && droppedObjectContainer.Count == 10);
         }
@@ -222,10 +233,15 @@ namespace osu.Game.Rulesets.Catch.Tests
 
         private void checkHyperDash(bool state) => AddAssert($"catcher is {(state ? "" : "not ")}hyper dashing", () => catcher.HyperDashing == state);
 
-        private void attemptCatch(CatchHitObject hitObject, int count = 1)
+        private void attemptCatch(CatchHitObject hitObject)
+        {
+            attemptCatch(() => hitObject, 1);
+        }
+
+        private void attemptCatch(Func<CatchHitObject> hitObject, int count)
         {
             for (var i = 0; i < count; i++)
-                attemptCatch(hitObject, out _, out _);
+                attemptCatch(hitObject(), out _, out _);
         }
 
         private void attemptCatch(CatchHitObject hitObject, out DrawableCatchHitObject drawableObject, out JudgementResult result)

osu.Game.Rulesets.Catch.Tests/TestSceneCatcherArea.cs

@@ -8,6 +8,8 @@ using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Testing;
+using osu.Framework.Threading;
+using osu.Framework.Utils;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Configuration;
@@ -31,12 +33,32 @@ namespace osu.Game.Rulesets.Catch.Tests
 
         private float circleSize;
 
+        private ScheduledDelegate addManyFruit;
+
+        private BeatmapDifficulty beatmapDifficulty;
+
         public TestSceneCatcherArea()
         {
             AddSliderStep<float>("circle size", 0, 8, 5, createCatcher);
             AddToggleStep("hyper dash", t => this.ChildrenOfType<TestCatcherArea>().ForEach(area => area.ToggleHyperDash(t)));
 
-            AddStep("catch fruit", () => attemptCatch(new Fruit()));
+            AddStep("catch centered fruit", () => attemptCatch(new Fruit()));
+            AddStep("catch many random fruit", () =>
+            {
+                int count = 50;
+
+                addManyFruit?.Cancel();
+                addManyFruit = Scheduler.AddDelayed(() =>
+                {
+                    attemptCatch(new Fruit
+                    {
+                        X = (RNG.NextSingle() - 0.5f) * Catcher.CalculateCatchWidth(beatmapDifficulty) * 0.6f,
+                    });
+
+                    if (count-- == 0)
+                        addManyFruit?.Cancel();
+                }, 50, true);
+            });
             AddStep("catch fruit last in combo", () => attemptCatch(new Fruit { LastInCombo = true }));
             AddStep("catch kiai fruit", () => attemptCatch(new TestSceneCatcher.TestKiaiFruit()));
             AddStep("miss last in combo", () => attemptCatch(new Fruit { X = 100, LastInCombo = true }));
@@ -45,10 +67,7 @@ namespace osu.Game.Rulesets.Catch.Tests
         private void attemptCatch(Fruit fruit)
         {
             fruit.X = fruit.OriginalX + catcher.X;
-            fruit.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty
-            {
-                CircleSize = circleSize
-            });
+            fruit.ApplyDefaults(new ControlPointInfo(), beatmapDifficulty);
 
             foreach (var area in this.ChildrenOfType<CatcherArea>())
             {
@@ -71,6 +90,11 @@ namespace osu.Game.Rulesets.Catch.Tests
         {
             circleSize = size;
 
+            beatmapDifficulty = new BeatmapDifficulty
+            {
+                CircleSize = circleSize
+            };
+
             SetContents(() =>
             {
                 var droppedObjectContainer = new Container<CaughtObject>
@@ -84,7 +108,7 @@ namespace osu.Game.Rulesets.Catch.Tests
                     Children = new Drawable[]
                     {
                         droppedObjectContainer,
-                        new TestCatcherArea(droppedObjectContainer, new BeatmapDifficulty { CircleSize = size })
+                        new TestCatcherArea(droppedObjectContainer, beatmapDifficulty)
                         {
                             Anchor = Anchor.Centre,
                             Origin = Anchor.TopCentre,

osu.Game.Rulesets.Catch.Tests/osu.Game.Rulesets.Catch.Tests.csproj

@@ -3,7 +3,7 @@
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
-    <PackageReference Include="NUnit" Version="3.13.1" />
+    <PackageReference Include="NUnit" Version="3.13.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
   </ItemGroup>

osu.Game.Rulesets.Catch/CatchRuleset.cs

@@ -114,6 +114,7 @@ namespace osu.Game.Rulesets.Catch
                     return new Mod[]
                     {
                         new CatchModDifficultyAdjust(),
+                        new CatchModClassic(),
                     };
 
                 case ModType.Automation:
@@ -126,7 +127,8 @@ namespace osu.Game.Rulesets.Catch
                 case ModType.Fun:
                     return new Mod[]
                     {
-                        new MultiMod(new ModWindUp(), new ModWindDown())
+                        new MultiMod(new ModWindUp(), new ModWindDown()),
+                        new CatchModFloatingFruits()
                     };
 
                 default:

osu.Game.Rulesets.Catch/Mods/CatchModClassic.cs

@@ -0,0 +1,11 @@
+// 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 osu.Game.Rulesets.Mods;
+
+namespace osu.Game.Rulesets.Catch.Mods
+{
+    public class CatchModClassic : ModClassic
+    {
+    }
+}

osu.Game.Rulesets.Catch/Mods/CatchModFloatingFruits.cs

@@ -0,0 +1,29 @@
+// 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 osu.Framework.Graphics;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Rulesets.Catch.Objects;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.UI;
+using osuTK;
+
+namespace osu.Game.Rulesets.Catch.Mods
+{
+    public class CatchModFloatingFruits : Mod, IApplicableToDrawableRuleset<CatchHitObject>
+    {
+        public override string Name => "Floating Fruits";
+        public override string Acronym => "FF";
+        public override string Description => "The fruits are... floating?";
+        public override double ScoreMultiplier => 1;
+        public override IconUsage? Icon => FontAwesome.Solid.Cloud;
+
+        public void ApplyToDrawableRuleset(DrawableRuleset<CatchHitObject> drawableRuleset)
+        {
+            drawableRuleset.Anchor = Anchor.Centre;
+            drawableRuleset.Origin = Anchor.Centre;
+
+            drawableRuleset.Scale = new Vector2(1, -1);
+        }
+    }
+}

osu.Game.Rulesets.Catch/Replays/CatchAutoGenerator.cs

@@ -5,7 +5,6 @@ using System;
 using System.Linq;
 using osu.Framework.Utils;
 using osu.Game.Beatmaps;
-using osu.Game.Replays;
 using osu.Game.Rulesets.Catch.Beatmaps;
 using osu.Game.Rulesets.Catch.Objects;
 using osu.Game.Rulesets.Catch.UI;
@@ -13,26 +12,19 @@ using osu.Game.Rulesets.Replays;
 
 namespace osu.Game.Rulesets.Catch.Replays
 {
-    internal class CatchAutoGenerator : AutoGenerator
+    internal class CatchAutoGenerator : AutoGenerator<CatchReplayFrame>
     {
-        public const double RELEASE_DELAY = 20;
-
         public new CatchBeatmap Beatmap => (CatchBeatmap)base.Beatmap;
 
         public CatchAutoGenerator(IBeatmap beatmap)
             : base(beatmap)
         {
-            Replay = new Replay();
         }
 
-        protected Replay Replay;
-
-        private CatchReplayFrame currentFrame;
-
-        public override Replay Generate()
+        protected override void GenerateFrames()
         {
             if (Beatmap.HitObjects.Count == 0)
-                return Replay;
+                return;
 
             // todo: add support for HT DT
             const double dash_speed = Catcher.BASE_SPEED;
@@ -119,19 +111,11 @@ namespace osu.Game.Rulesets.Catch.Replays
                     }
                 }
             }
-
-            return Replay;
         }
 
         private void addFrame(double time, float? position = null, bool dashing = false)
         {
-            // todo: can be removed once FramedReplayInputHandler correctly handles rewinding before first frame.
-            if (Replay.Frames.Count == 0)
-                Replay.Frames.Add(new CatchReplayFrame(time - 1, position, false, null));
-
-            var last = currentFrame;
-            currentFrame = new CatchReplayFrame(time, position, dashing, last);
-            Replay.Frames.Add(currentFrame);
+            Frames.Add(new CatchReplayFrame(time, position, dashing, LastFrame));
         }
     }
 }

osu.Game.Rulesets.Catch/Replays/CatchFramedReplayInputHandler.cs

@@ -2,7 +2,6 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Linq;
 using osu.Framework.Input.StateChanges;
 using osu.Framework.Utils;
@@ -20,29 +19,14 @@ namespace osu.Game.Rulesets.Catch.Replays
 
         protected override bool IsImportant(CatchReplayFrame frame) => frame.Actions.Any();
 
-        protected float? Position
-        {
-            get
-            {
-                var frame = CurrentFrame;
-
-                if (frame == null)
-                    return null;
-
-                Debug.Assert(CurrentTime != null);
-
-                return NextFrame != null ? Interpolation.ValueAt(CurrentTime.Value, frame.Position, NextFrame.Position, frame.Time, NextFrame.Time) : frame.Position;
-            }
-        }
-
         public override void CollectPendingInputs(List<IInput> inputs)
         {
-            if (!Position.HasValue) return;
+            var position = Interpolation.ValueAt(CurrentTime, StartFrame.Position, EndFrame.Position, StartFrame.Time, EndFrame.Time);
 
             inputs.Add(new CatchReplayState
             {
                 PressedActions = CurrentFrame?.Actions ?? new List<CatchAction>(),
-                CatcherX = Position.Value
+                CatcherX = position
             });
         }
 

osu.Game.Rulesets.Catch/Skinning/Legacy/LegacyCatchComboCounter.cs

@@ -30,7 +30,7 @@ namespace osu.Game.Rulesets.Catch.Skinning.Legacy
 
             InternalChildren = new Drawable[]
             {
-                explosion = new LegacyRollingCounter(skin, LegacyFont.Combo)
+                explosion = new LegacyRollingCounter(LegacyFont.Combo)
                 {
                     Alpha = 0.65f,
                     Blending = BlendingParameters.Additive,
@@ -38,7 +38,7 @@ namespace osu.Game.Rulesets.Catch.Skinning.Legacy
                     Origin = Anchor.Centre,
                     Scale = new Vector2(1.5f),
                 },
-                counter = new LegacyRollingCounter(skin, LegacyFont.Combo)
+                counter = new LegacyRollingCounter(LegacyFont.Combo)
                 {
                     Anchor = Anchor.Centre,
                     Origin = Anchor.Centre,

osu.Game.Rulesets.Catch/UI/CatchPlayfield.cs

@@ -51,8 +51,11 @@ namespace osu.Game.Rulesets.Catch.UI
             {
                 droppedObjectContainer,
                 CatcherArea.MovableCatcher.CreateProxiedContent(),
-                HitObjectContainer,
+                HitObjectContainer.CreateProxy(),
+                // This ordering (`CatcherArea` before `HitObjectContainer`) is important to
+                // make sure the up-to-date catcher position is used for the catcher catching logic of hit objects.
                 CatcherArea,
+                HitObjectContainer,
             };
         }
 

osu.Game.Rulesets.Catch/UI/Catcher.cs

@@ -53,6 +53,16 @@ namespace osu.Game.Rulesets.Catch.UI
         /// </summary>
         public const double BASE_SPEED = 1.0;
 
+        /// <summary>
+        /// The amount by which caught fruit should be offset from the plate surface to make them look visually "caught".
+        /// </summary>
+        public const float CAUGHT_FRUIT_VERTICAL_OFFSET = -5;
+
+        /// <summary>
+        /// The amount by which caught fruit should be scaled down to fit on the plate.
+        /// </summary>
+        private const float caught_fruit_scale_adjust = 0.5f;
+
         [NotNull]
         private readonly Container trailsTarget;
 
@@ -202,13 +212,13 @@ namespace osu.Game.Rulesets.Catch.UI
         /// Calculates the width of the area used for attempting catches in gameplay.
         /// </summary>
         /// <param name="scale">The scale of the catcher.</param>
-        internal static float CalculateCatchWidth(Vector2 scale) => CatcherArea.CATCHER_SIZE * Math.Abs(scale.X) * ALLOWED_CATCH_RANGE;
+        public static float CalculateCatchWidth(Vector2 scale) => CatcherArea.CATCHER_SIZE * Math.Abs(scale.X) * ALLOWED_CATCH_RANGE;
 
         /// <summary>
         /// Calculates the width of the area used for attempting catches in gameplay.
         /// </summary>
         /// <param name="difficulty">The beatmap difficulty.</param>
-        internal static float CalculateCatchWidth(BeatmapDifficulty difficulty) => CalculateCatchWidth(calculateScale(difficulty));
+        public static float CalculateCatchWidth(BeatmapDifficulty difficulty) => CalculateCatchWidth(calculateScale(difficulty));
 
         /// <summary>
         /// Determine if this catcher can catch a <see cref="CatchHitObject"/> in the current position.
@@ -240,7 +250,7 @@ namespace osu.Game.Rulesets.Catch.UI
 
             if (result.IsHit)
             {
-                var positionInStack = computePositionInStack(new Vector2(palpableObject.X - X, 0), palpableObject.DisplaySize.X / 2);
+                var positionInStack = computePositionInStack(new Vector2(palpableObject.X - X, 0), palpableObject.DisplaySize.X);
 
                 if (CatchFruitOnPlate)
                     placeCaughtObject(palpableObject, positionInStack);
@@ -384,16 +394,7 @@ namespace osu.Game.Rulesets.Catch.UI
         {
             updateTrailVisibility();
 
-            if (hyperDashing)
-            {
-                this.FadeColour(hyperDashColour, HYPER_DASH_TRANSITION_DURATION, Easing.OutQuint);
-                this.FadeTo(0.2f, HYPER_DASH_TRANSITION_DURATION, Easing.OutQuint);
-            }
-            else
-            {
-                this.FadeColour(Color4.White, HYPER_DASH_TRANSITION_DURATION, Easing.OutQuint);
-                this.FadeTo(1f, HYPER_DASH_TRANSITION_DURATION, Easing.OutQuint);
-            }
+            this.FadeColour(hyperDashing ? hyperDashColour : Color4.White, HYPER_DASH_TRANSITION_DURATION, Easing.OutQuint);
         }
 
         private void updateTrailVisibility() => trails.DisplayTrail = Dashing || HyperDashing;
@@ -479,7 +480,7 @@ namespace osu.Game.Rulesets.Catch.UI
             caughtObject.CopyStateFrom(drawableObject);
             caughtObject.Anchor = Anchor.TopCentre;
             caughtObject.Position = position;
-            caughtObject.Scale /= 2;
+            caughtObject.Scale *= caught_fruit_scale_adjust;
 
             caughtObjectContainer.Add(caughtObject);
 
@@ -489,19 +490,21 @@ namespace osu.Game.Rulesets.Catch.UI
 
         private Vector2 computePositionInStack(Vector2 position, float displayRadius)
         {
-            const float radius_div_2 = CatchHitObject.OBJECT_RADIUS / 2;
-            const float allowance = 10;
+            // this is taken from osu-stable (lenience should be 10 * 10 at standard scale).
+            const float lenience_adjust = 10 / CatchHitObject.OBJECT_RADIUS;
 
-            while (caughtObjectContainer.Any(f => Vector2Extensions.Distance(f.Position, position) < (displayRadius + radius_div_2) / (allowance / 2)))
+            float adjustedRadius = displayRadius * lenience_adjust;
+            float checkDistance = MathF.Pow(adjustedRadius, 2);
+
+            // offset fruit vertically to better place "above" the plate.
+            position.Y += CAUGHT_FRUIT_VERTICAL_OFFSET;
+
+            while (caughtObjectContainer.Any(f => Vector2Extensions.DistanceSquared(f.Position, position) < checkDistance))
             {
-                float diff = (displayRadius + radius_div_2) / allowance;
-
-                position.X += (RNG.NextSingle() - 0.5f) * diff * 2;
-                position.Y -= RNG.NextSingle() * diff;
+                position.X += RNG.NextSingle(-adjustedRadius, adjustedRadius);
+                position.Y -= RNG.NextSingle(0, 5);
             }
 
-            position.X = Math.Clamp(position.X, -CatcherArea.CATCHER_SIZE / 2, CatcherArea.CATCHER_SIZE / 2);
-
             return position;
         }
 

osu.Game.Rulesets.Mania.Tests/TestSceneAutoGeneration.cs

@@ -19,7 +19,7 @@ namespace osu.Game.Rulesets.Mania.Tests
         /// <summary>
         /// The number of frames which are generated at the start of a replay regardless of hitobject content.
         /// </summary>
-        private const int frame_offset = 1;
+        private const int frame_offset = 0;
 
         [Test]
         public void TestSingleNote()
@@ -33,7 +33,7 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == frame_offset + 2, "Replay must have 3 frames");
+            Assert.AreEqual(generated.Frames.Count, frame_offset + 2, "Incorrect number of frames");
             Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect hit time");
             Assert.AreEqual(1000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[frame_offset + 1].Time, "Incorrect release time");
             Assert.IsTrue(checkContains(generated.Frames[frame_offset], ManiaAction.Special1), "Special1 has not been pressed");
@@ -54,7 +54,7 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == frame_offset + 2, "Replay must have 3 frames");
+            Assert.AreEqual(generated.Frames.Count, frame_offset + 2, "Incorrect number of frames");
             Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect hit time");
             Assert.AreEqual(3000, generated.Frames[frame_offset + 1].Time, "Incorrect release time");
             Assert.IsTrue(checkContains(generated.Frames[frame_offset], ManiaAction.Special1), "Special1 has not been pressed");
@@ -74,7 +74,7 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == frame_offset + 2, "Replay must have 3 frames");
+            Assert.AreEqual(generated.Frames.Count, frame_offset + 2, "Incorrect number of frames");
             Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect hit time");
             Assert.AreEqual(1000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[frame_offset + 1].Time, "Incorrect release time");
             Assert.IsTrue(checkContains(generated.Frames[frame_offset], ManiaAction.Key1, ManiaAction.Key2), "Key1 & Key2 have not been pressed");
@@ -96,7 +96,7 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == frame_offset + 2, "Replay must have 3 frames");
+            Assert.AreEqual(generated.Frames.Count, frame_offset + 2, "Incorrect number of frames");
 
             Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect hit time");
             Assert.AreEqual(3000, generated.Frames[frame_offset + 1].Time, "Incorrect release time");
@@ -119,7 +119,7 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == frame_offset + 4, "Replay must have 4 generated frames");
+            Assert.AreEqual(generated.Frames.Count, frame_offset + 4, "Incorrect number of frames");
             Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect first note hit time");
             Assert.AreEqual(1000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[frame_offset + 1].Time, "Incorrect first note release time");
             Assert.AreEqual(2000, generated.Frames[frame_offset + 2].Time, "Incorrect second note hit time");
@@ -146,7 +146,7 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == frame_offset + 4, "Replay must have 4 generated frames");
+            Assert.AreEqual(generated.Frames.Count, frame_offset + 4, "Incorrect number of frames");
             Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect first note hit time");
             Assert.AreEqual(3000, generated.Frames[frame_offset + 2].Time, "Incorrect first note release time");
             Assert.AreEqual(2000, generated.Frames[frame_offset + 1].Time, "Incorrect second note hit time");
@@ -173,7 +173,7 @@ namespace osu.Game.Rulesets.Mania.Tests
 
             var generated = new ManiaAutoGenerator(beatmap).Generate();
 
-            Assert.IsTrue(generated.Frames.Count == frame_offset + 3, "Replay must have 3 generated frames");
+            Assert.AreEqual(generated.Frames.Count, frame_offset + 3, "Incorrect number of frames");
             Assert.AreEqual(1000, generated.Frames[frame_offset].Time, "Incorrect first note hit time");
             Assert.AreEqual(3000, generated.Frames[frame_offset + 1].Time, "Incorrect second note press time + first note release time");
             Assert.AreEqual(3000 + ManiaAutoGenerator.RELEASE_DELAY, generated.Frames[frame_offset + 2].Time, "Incorrect second note release time");

osu.Game.Rulesets.Mania.Tests/TestSceneHoldNoteInput.cs

@@ -324,6 +324,33 @@ namespace osu.Game.Rulesets.Mania.Tests
             assertTailJudgement(HitResult.Ok);
         }
 
+        [Test]
+        public void TestZeroLength()
+        {
+            var beatmap = new Beatmap<ManiaHitObject>
+            {
+                HitObjects =
+                {
+                    new HoldNote
+                    {
+                        StartTime = 1000,
+                        Duration = 0,
+                        Column = 0,
+                    },
+                },
+                BeatmapInfo = { Ruleset = new ManiaRuleset().RulesetInfo },
+            };
+
+            performTest(new List<ReplayFrame>
+            {
+                new ManiaReplayFrame(beatmap.HitObjects[0].StartTime, ManiaAction.Key1),
+                new ManiaReplayFrame(beatmap.HitObjects[0].GetEndTime() + 1),
+            }, beatmap);
+
+            AddAssert("hold note hit", () => judgementResults.Where(j => beatmap.HitObjects[0].NestedHitObjects.Contains(j.HitObject))
+                                                             .All(j => j.Type.IsHit()));
+        }
+
         private void assertHeadJudgement(HitResult result)
             => AddAssert($"head judged as {result}", () => judgementResults.First(j => j.HitObject is Note).Type == result);
 

osu.Game.Rulesets.Mania.Tests/TestSceneTimingBasedNoteColouring.cs

@@ -0,0 +1,80 @@
+// 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 NUnit.Framework;
+using osu.Framework.Graphics;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Tests.Visual;
+using osu.Framework.Timing;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Mania.Beatmaps;
+using osu.Game.Rulesets.Mania.Configuration;
+using osu.Framework.Bindables;
+
+namespace osu.Game.Rulesets.Mania.Tests
+{
+    [TestFixture]
+    public class TestSceneTimingBasedNoteColouring : OsuTestScene
+    {
+        [Resolved]
+        private RulesetConfigCache configCache { get; set; }
+
+        private readonly Bindable<bool> configTimingBasedNoteColouring = new Bindable<bool>();
+
+        protected override void LoadComplete()
+        {
+            const double beat_length = 500;
+
+            var ruleset = new ManiaRuleset();
+
+            var beatmap = new ManiaBeatmap(new StageDefinition { Columns = 1 })
+            {
+                HitObjects =
+                {
+                    new Note { StartTime = 0 },
+                    new Note { StartTime = beat_length / 16 },
+                    new Note { StartTime = beat_length / 12 },
+                    new Note { StartTime = beat_length / 8 },
+                    new Note { StartTime = beat_length / 6 },
+                    new Note { StartTime = beat_length / 4 },
+                    new Note { StartTime = beat_length / 3 },
+                    new Note { StartTime = beat_length / 2 },
+                    new Note { StartTime = beat_length }
+                },
+                ControlPointInfo = new ControlPointInfo(),
+                BeatmapInfo = { Ruleset = ruleset.RulesetInfo },
+            };
+
+            foreach (var note in beatmap.HitObjects)
+            {
+                note.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());
+            }
+
+            beatmap.ControlPointInfo.Add(0, new TimingControlPoint
+            {
+                BeatLength = beat_length
+            });
+
+            Child = new Container
+            {
+                Clock = new FramedClock(new ManualClock()),
+                RelativeSizeAxes = Axes.Both,
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                Children = new[]
+                {
+                    ruleset.CreateDrawableRulesetWith(beatmap)
+                }
+            };
+
+            var config = (ManiaRulesetConfigManager)configCache.GetConfigFor(Ruleset.Value.CreateInstance());
+            config.BindWith(ManiaRulesetSetting.TimingBasedNoteColouring, configTimingBasedNoteColouring);
+
+            AddStep("Enable", () => configTimingBasedNoteColouring.Value = true);
+            AddStep("Disable", () => configTimingBasedNoteColouring.Value = false);
+        }
+    }
+}

osu.Game.Rulesets.Mania.Tests/osu.Game.Rulesets.Mania.Tests.csproj

@@ -3,7 +3,7 @@
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
-    <PackageReference Include="NUnit" Version="3.13.1" />
+    <PackageReference Include="NUnit" Version="3.13.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
   </ItemGroup>

osu.Game.Rulesets.Mania/Beatmaps/Patterns/Legacy/DistanceObjectPatternGenerator.cs

@@ -482,7 +482,6 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// Retrieves the sample info list at a point in time.
         /// </summary>
         /// <param name="time">The time to retrieve the sample info list from.</param>
-        /// <returns></returns>
         private IList<HitSampleInfo> sampleInfoListAt(int time) => nodeSamplesAt(time)?.First() ?? HitObject.Samples;
 
         /// <summary>

osu.Game.Rulesets.Mania/Configuration/ManiaRulesetConfigManager.cs

@@ -22,6 +22,7 @@ namespace osu.Game.Rulesets.Mania.Configuration
 
             SetDefault(ManiaRulesetSetting.ScrollTime, 1500.0, DrawableManiaRuleset.MIN_TIME_RANGE, DrawableManiaRuleset.MAX_TIME_RANGE, 5);
             SetDefault(ManiaRulesetSetting.ScrollDirection, ManiaScrollingDirection.Down);
+            SetDefault(ManiaRulesetSetting.TimingBasedNoteColouring, false);
         }
 
         public override TrackedSettings CreateTrackedSettings() => new TrackedSettings
@@ -34,6 +35,7 @@ namespace osu.Game.Rulesets.Mania.Configuration
     public enum ManiaRulesetSetting
     {
         ScrollTime,
-        ScrollDirection
+        ScrollDirection,
+        TimingBasedNoteColouring
     }
 }

osu.Game.Rulesets.Mania/Edit/Blueprints/HoldNotePlacementBlueprint.cs

@@ -73,7 +73,7 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
                 return;
 
             base.OnMouseUp(e);
-            EndPlacement(true);
+            EndPlacement(HitObject.Duration > 0);
         }
 
         private double originalStartTime;
@@ -82,7 +82,7 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
         {
             base.UpdateTimeAndPosition(result);
 
-            if (PlacementActive)
+            if (PlacementActive == PlacementState.Active)
             {
                 if (result.Time is double endTime)
                 {

osu.Game.Rulesets.Mania/Edit/Blueprints/ManiaPlacementBlueprint.cs

@@ -52,7 +52,7 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
         {
             base.UpdateTimeAndPosition(result);
 
-            if (!PlacementActive)
+            if (PlacementActive == PlacementState.Waiting)
                 Column = result.Playfield as Column;
         }
     }

osu.Game.Rulesets.Mania/Edit/DrawableManiaEditorRuleset.cs

@@ -12,16 +12,16 @@ using osu.Game.Rulesets.UI.Scrolling;
 
 namespace osu.Game.Rulesets.Mania.Edit
 {
-    public class DrawableManiaEditRuleset : DrawableManiaRuleset
+    public class DrawableManiaEditorRuleset : DrawableManiaRuleset
     {
         public new IScrollingInfo ScrollingInfo => base.ScrollingInfo;
 
-        public DrawableManiaEditRuleset(Ruleset ruleset, IBeatmap beatmap, IReadOnlyList<Mod> mods)
+        public DrawableManiaEditorRuleset(Ruleset ruleset, IBeatmap beatmap, IReadOnlyList<Mod> mods)
             : base(ruleset, beatmap, mods)
         {
         }
 
-        protected override Playfield CreatePlayfield() => new ManiaEditPlayfield(Beatmap.Stages)
+        protected override Playfield CreatePlayfield() => new ManiaEditorPlayfield(Beatmap.Stages)
         {
             Anchor = Anchor.Centre,
             Origin = Anchor.Centre,

osu.Game.Rulesets.Mania/Edit/ManiaBlueprintContainer.cs

@@ -4,6 +4,7 @@
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Mania.Edit.Blueprints;
 using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Screens.Edit.Compose.Components;
 
@@ -30,6 +31,6 @@ namespace osu.Game.Rulesets.Mania.Edit
             return base.CreateBlueprintFor(hitObject);
         }
 
-        protected override SelectionHandler CreateSelectionHandler() => new ManiaSelectionHandler();
+        protected override SelectionHandler<HitObject> CreateSelectionHandler() => new ManiaSelectionHandler();
     }
 }

osu.Game.Rulesets.Mania/Edit/ManiaEditorPlayfield.cs

@@ -7,9 +7,9 @@ using System.Collections.Generic;
 
 namespace osu.Game.Rulesets.Mania.Edit
 {
-    public class ManiaEditPlayfield : ManiaPlayfield
+    public class ManiaEditorPlayfield : ManiaPlayfield
     {
-        public ManiaEditPlayfield(List<StageDefinition> stages)
+        public ManiaEditorPlayfield(List<StageDefinition> stages)
             : base(stages)
         {
         }

osu.Game.Rulesets.Mania/Edit/ManiaHitObjectComposer.cs

@@ -22,7 +22,7 @@ namespace osu.Game.Rulesets.Mania.Edit
 {
     public class ManiaHitObjectComposer : HitObjectComposer<ManiaHitObject>
     {
-        private DrawableManiaEditRuleset drawableRuleset;
+        private DrawableManiaEditorRuleset drawableRuleset;
         private ManiaBeatSnapGrid beatSnapGrid;
         private InputManager inputManager;
 
@@ -80,7 +80,7 @@ namespace osu.Game.Rulesets.Mania.Edit
 
         protected override DrawableRuleset<ManiaHitObject> CreateDrawableRuleset(Ruleset ruleset, IBeatmap beatmap, IReadOnlyList<Mod> mods = null)
         {
-            drawableRuleset = new DrawableManiaEditRuleset(ruleset, beatmap, mods);
+            drawableRuleset = new DrawableManiaEditorRuleset(ruleset, beatmap, mods);
 
             // This is the earliest we can cache the scrolling info to ourselves, before masks are added to the hierarchy and inject it
             dependencies.CacheAs(drawableRuleset.ScrollingInfo);

osu.Game.Rulesets.Mania/Edit/ManiaSelectionHandler.cs

@@ -7,12 +7,13 @@ using osu.Framework.Allocation;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Mania.Edit.Blueprints;
 using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.UI.Scrolling;
 using osu.Game.Screens.Edit.Compose.Components;
 
 namespace osu.Game.Rulesets.Mania.Edit
 {
-    public class ManiaSelectionHandler : SelectionHandler
+    public class ManiaSelectionHandler : EditorSelectionHandler
     {
         [Resolved]
         private IScrollingInfo scrollingInfo { get; set; }
@@ -20,7 +21,7 @@ namespace osu.Game.Rulesets.Mania.Edit
         [Resolved]
         private HitObjectComposer composer { get; set; }
 
-        public override bool HandleMovement(MoveSelectionEvent moveEvent)
+        public override bool HandleMovement(MoveSelectionEvent<HitObject> moveEvent)
         {
             var maniaBlueprint = (ManiaSelectionBlueprint)moveEvent.Blueprint;
             int lastColumn = maniaBlueprint.DrawableObject.HitObject.Column;
@@ -30,11 +31,11 @@ namespace osu.Game.Rulesets.Mania.Edit
             return true;
         }
 
-        private void performColumnMovement(int lastColumn, MoveSelectionEvent moveEvent)
+        private void performColumnMovement(int lastColumn, MoveSelectionEvent<HitObject> moveEvent)
         {
             var maniaPlayfield = ((ManiaHitObjectComposer)composer).Playfield;
 
-            var currentColumn = maniaPlayfield.GetColumnByPosition(moveEvent.ScreenSpacePosition);
+            var currentColumn = maniaPlayfield.GetColumnByPosition(moveEvent.Blueprint.ScreenSpaceSelectionPoint + moveEvent.ScreenSpaceDelta);
             if (currentColumn == null)
                 return;
 

osu.Game.Rulesets.Mania/ManiaRuleset.cs

@@ -47,7 +47,7 @@ namespace osu.Game.Rulesets.Mania
 
         public override ScoreProcessor CreateScoreProcessor() => new ManiaScoreProcessor();
 
-        public override HealthProcessor CreateHealthProcessor(double drainStartTime) => new DrainingHealthProcessor(drainStartTime, 0.2);
+        public override HealthProcessor CreateHealthProcessor(double drainStartTime) => new DrainingHealthProcessor(drainStartTime, 0.5);
 
         public override IBeatmapConverter CreateBeatmapConverter(IBeatmap beatmap) => new ManiaBeatmapConverter(beatmap, this);
 
@@ -239,6 +239,7 @@ namespace osu.Game.Rulesets.Mania
                         new ManiaModDualStages(),
                         new ManiaModMirror(),
                         new ManiaModDifficultyAdjust(),
+                        new ManiaModClassic(),
                         new ManiaModInvert(),
                         new ManiaModConstantSpeed()
                     };

osu.Game.Rulesets.Mania/ManiaSettingsSubsection.cs

@@ -37,6 +37,11 @@ namespace osu.Game.Rulesets.Mania
                     Current = config.GetBindable<double>(ManiaRulesetSetting.ScrollTime),
                     KeyboardStep = 5
                 },
+                new SettingsCheckbox
+                {
+                    LabelText = "Timing-based note colouring",
+                    Current = config.GetBindable<bool>(ManiaRulesetSetting.TimingBasedNoteColouring),
+                }
             };
         }
 

osu.Game.Rulesets.Mania/Mods/ManiaModClassic.cs

@@ -0,0 +1,11 @@
+// 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 osu.Game.Rulesets.Mods;
+
+namespace osu.Game.Rulesets.Mania.Mods
+{
+    public class ManiaModClassic : ModClassic
+    {
+    }
+}

osu.Game.Rulesets.Mania/Mods/ManiaModMirror.cs

@@ -15,6 +15,7 @@ namespace osu.Game.Rulesets.Mania.Mods
         public override string Name => "Mirror";
         public override string Acronym => "MR";
         public override ModType Type => ModType.Conversion;
+        public override string Description => "Notes are flipped horizontally.";
         public override double ScoreMultiplier => 1;
         public override bool Ranked => true;
 

osu.Game.Rulesets.Mania/Objects/Drawables/DrawableHoldNote.cs

@@ -221,7 +221,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
             // As the note is being held, adjust the size of the sizing container. This has two effects:
             // 1. The contained masking container will mask the body and ticks.
             // 2. The head note will move along with the new "head position" in the container.
-            if (Head.IsHit && releaseTime == null)
+            if (Head.IsHit && releaseTime == null && DrawHeight > 0)
             {
                 // How far past the hit target this hold note is. Always a positive value.
                 float yOffset = Math.Max(0, Direction.Value == ScrollingDirection.Up ? -Y : Y);

osu.Game.Rulesets.Mania/Objects/Drawables/DrawableManiaHitObject.cs

@@ -6,6 +6,7 @@ using JetBrains.Annotations;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
+using osu.Game.Audio;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.UI.Scrolling;
 using osu.Game.Rulesets.Mania.UI;
@@ -24,6 +25,11 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
         [Resolved(canBeNull: true)]
         private ManiaPlayfield playfield { get; set; }
 
+        /// <summary>
+        /// Gets the samples that are played by this object during gameplay.
+        /// </summary>
+        public ISampleInfo[] GetGameplaySamples() => Samples.Samples;
+
         protected override float SamplePlaybackPosition
         {
             get

osu.Game.Rulesets.Mania/Objects/Drawables/DrawableNote.cs

@@ -2,13 +2,19 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Diagnostics;
+using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Input.Bindings;
+using osu.Game.Beatmaps;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Mania.Configuration;
 using osu.Game.Rulesets.Mania.Skinning.Default;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI.Scrolling;
+using osu.Game.Screens.Edit;
 using osu.Game.Skinning;
+using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Mania.Objects.Drawables
 {
@@ -17,6 +23,14 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
     /// </summary>
     public class DrawableNote : DrawableManiaHitObject<Note>, IKeyBindingHandler<ManiaAction>
     {
+        [Resolved]
+        private OsuColour colours { get; set; }
+
+        [Resolved(canBeNull: true)]
+        private IBeatmap beatmap { get; set; }
+
+        private readonly Bindable<bool> configTimingBasedNoteColouring = new Bindable<bool>();
+
         protected virtual ManiaSkinComponents Component => ManiaSkinComponents.Note;
 
         private readonly Drawable headPiece;
@@ -34,6 +48,18 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
             });
         }
 
+        [BackgroundDependencyLoader(true)]
+        private void load(ManiaRulesetConfigManager rulesetConfig)
+        {
+            rulesetConfig?.BindWith(ManiaRulesetSetting.TimingBasedNoteColouring, configTimingBasedNoteColouring);
+        }
+
+        protected override void LoadComplete()
+        {
+            HitObject.StartTimeBindable.BindValueChanged(_ => updateSnapColour());
+            configTimingBasedNoteColouring.BindValueChanged(_ => updateSnapColour(), true);
+        }
+
         protected override void OnDirectionChanged(ValueChangedEvent<ScrollingDirection> e)
         {
             base.OnDirectionChanged(e);
@@ -73,5 +99,14 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
         public virtual void OnReleased(ManiaAction action)
         {
         }
+
+        private void updateSnapColour()
+        {
+            if (beatmap == null) return;
+
+            int snapDivisor = beatmap.ControlPointInfo.GetClosestBeatDivisor(HitObject.StartTime);
+
+            Colour = configTimingBasedNoteColouring.Value ? BindableBeatDivisor.GetColourFor(snapDivisor, colours) : Color4.White;
+        }
     }
 }

osu.Game.Rulesets.Mania/Objects/ManiaHitObject.cs

@@ -2,7 +2,6 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using osu.Framework.Bindables;
-using osu.Game.Rulesets.Mania.Objects.Types;
 using osu.Game.Rulesets.Mania.Scoring;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;

osu.Game.Rulesets.Mania/Replays/ManiaAutoGenerator.cs

@@ -3,7 +3,6 @@
 
 using System.Collections.Generic;
 using System.Linq;
-using osu.Game.Replays;
 using osu.Game.Rulesets.Mania.Beatmaps;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Objects;
@@ -11,7 +10,7 @@ using osu.Game.Rulesets.Replays;
 
 namespace osu.Game.Rulesets.Mania.Replays
 {
-    internal class ManiaAutoGenerator : AutoGenerator
+    internal class ManiaAutoGenerator : AutoGenerator<ManiaReplayFrame>
     {
         public const double RELEASE_DELAY = 20;
 
@@ -22,8 +21,6 @@ namespace osu.Game.Rulesets.Mania.Replays
         public ManiaAutoGenerator(ManiaBeatmap beatmap)
             : base(beatmap)
         {
-            Replay = new Replay();
-
             columnActions = new ManiaAction[Beatmap.TotalColumns];
 
             var normalAction = ManiaAction.Key1;
@@ -43,12 +40,10 @@ namespace osu.Game.Rulesets.Mania.Replays
             }
         }
 
-        protected Replay Replay;
-
-        public override Replay Generate()
+        protected override void GenerateFrames()
         {
             if (Beatmap.HitObjects.Count == 0)
-                return Replay;
+                return;
 
             var pointGroups = generateActionPoints().GroupBy(a => a.Time).OrderBy(g => g.First().Time);
 
@@ -70,14 +65,8 @@ namespace osu.Game.Rulesets.Mania.Replays
                     }
                 }
 
-                // todo: can be removed once FramedReplayInputHandler correctly handles rewinding before first frame.
-                if (Replay.Frames.Count == 0)
-                    Replay.Frames.Add(new ManiaReplayFrame(group.First().Time - 1));
-
-                Replay.Frames.Add(new ManiaReplayFrame(group.First().Time, actions.ToArray()));
+                Frames.Add(new ManiaReplayFrame(group.First().Time, actions.ToArray()));
             }
-
-            return Replay;
         }
 
         private IEnumerable<IActionPoint> generateActionPoints()

osu.Game.Rulesets.Mania/UI/Column.cs

@@ -27,6 +27,12 @@ namespace osu.Game.Rulesets.Mania.UI
         public const float COLUMN_WIDTH = 80;
         public const float SPECIAL_COLUMN_WIDTH = 70;
 
+        /// <summary>
+        /// For hitsounds played by this <see cref="Column"/> (i.e. not as a result of hitting a hitobject),
+        /// a certain number of samples are allowed to be played concurrently so that it feels better when spam-pressing the key.
+        /// </summary>
+        private const int max_concurrent_hitsounds = OsuGameBase.SAMPLE_CONCURRENCY;
+
         /// <summary>
         /// The index of this column as part of the whole playfield.
         /// </summary>
@@ -38,6 +44,7 @@ namespace osu.Game.Rulesets.Mania.UI
         internal readonly Container TopLevelContainer;
         private readonly DrawablePool<PoolableHitExplosion> hitExplosionPool;
         private readonly OrderedHitPolicy hitPolicy;
+        private readonly Container<SkinnableSound> hitSounds;
 
         public Container UnderlayElements => HitObjectArea.UnderlayElements;
 
@@ -64,6 +71,12 @@ namespace osu.Game.Rulesets.Mania.UI
                     RelativeSizeAxes = Axes.Both
                 },
                 background,
+                hitSounds = new Container<SkinnableSound>
+                {
+                    Name = "Column samples pool",
+                    RelativeSizeAxes = Axes.Both,
+                    Children = Enumerable.Range(0, max_concurrent_hitsounds).Select(_ => new SkinnableSound()).ToArray()
+                },
                 TopLevelContainer = new Container { RelativeSizeAxes = Axes.Both }
             };
 
@@ -120,6 +133,8 @@ namespace osu.Game.Rulesets.Mania.UI
             HitObjectArea.Explosions.Add(hitExplosionPool.Get(e => e.Apply(result)));
         }
 
+        private int nextHitSoundIndex;
+
         public bool OnPressed(ManiaAction action)
         {
             if (action != Action.Value)
@@ -131,7 +146,15 @@ namespace osu.Game.Rulesets.Mania.UI
                 HitObjectContainer.Objects.FirstOrDefault(h => h.HitObject.StartTime > Time.Current) ??
                 HitObjectContainer.Objects.LastOrDefault();
 
-            nextObject?.PlaySamples();
+            if (nextObject is DrawableManiaHitObject maniaObject)
+            {
+                var hitSound = hitSounds[nextHitSoundIndex];
+
+                hitSound.Samples = maniaObject.GetGameplaySamples();
+                hitSound.Play();
+
+                nextHitSoundIndex = (nextHitSoundIndex + 1) % max_concurrent_hitsounds;
+            }
 
             return true;
         }

osu.Game.Rulesets.Osu.Tests/Editor/Checks/CheckOffscreenObjectsTest.cs

@@ -0,0 +1,250 @@
+// 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.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Edit.Checks;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.UI;
+using osu.Game.Tests.Beatmaps;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Tests.Editor.Checks
+{
+    [TestFixture]
+    public class CheckOffscreenObjectsTest
+    {
+        private static readonly Vector2 playfield_centre = OsuPlayfield.BASE_SIZE * 0.5f;
+
+        private CheckOffscreenObjects check;
+
+        [SetUp]
+        public void Setup()
+        {
+            check = new CheckOffscreenObjects();
+        }
+
+        [Test]
+        public void TestCircleInCenter()
+        {
+            assertOk(new Beatmap<HitObject>
+            {
+                HitObjects = new List<HitObject>
+                {
+                    new HitCircle
+                    {
+                        StartTime = 3000,
+                        Position = playfield_centre
+                    }
+                }
+            });
+        }
+
+        [Test]
+        public void TestCircleNearEdge()
+        {
+            assertOk(new Beatmap<HitObject>
+            {
+                HitObjects = new List<HitObject>
+                {
+                    new HitCircle
+                    {
+                        StartTime = 3000,
+                        Position = new Vector2(5, 5)
+                    }
+                }
+            });
+        }
+
+        [Test]
+        public void TestCircleNearEdgeStackedOffscreen()
+        {
+            assertOffscreenCircle(new Beatmap<HitObject>
+            {
+                HitObjects = new List<HitObject>
+                {
+                    new HitCircle
+                    {
+                        StartTime = 3000,
+                        Position = new Vector2(5, 5),
+                        StackHeight = 5
+                    }
+                }
+            });
+        }
+
+        [Test]
+        public void TestCircleOffscreen()
+        {
+            assertOffscreenCircle(new Beatmap<HitObject>
+            {
+                HitObjects = new List<HitObject>
+                {
+                    new HitCircle
+                    {
+                        StartTime = 3000,
+                        Position = new Vector2(0, 0)
+                    }
+                }
+            });
+        }
+
+        [Test]
+        public void TestSliderInCenter()
+        {
+            assertOk(new Beatmap<HitObject>
+            {
+                HitObjects = new List<HitObject>
+                {
+                    new Slider
+                    {
+                        StartTime = 3000,
+                        Position = new Vector2(420, 240),
+                        Path = new SliderPath(new[]
+                        {
+                            new PathControlPoint(new Vector2(0, 0), PathType.Linear),
+                            new PathControlPoint(new Vector2(-100, 0))
+                        }),
+                    }
+                }
+            });
+        }
+
+        [Test]
+        public void TestSliderNearEdge()
+        {
+            assertOk(new Beatmap<HitObject>
+            {
+                HitObjects = new List<HitObject>
+                {
+                    new Slider
+                    {
+                        StartTime = 3000,
+                        Position = playfield_centre,
+                        Path = new SliderPath(new[]
+                        {
+                            new PathControlPoint(new Vector2(0, 0), PathType.Linear),
+                            new PathControlPoint(new Vector2(0, -playfield_centre.Y + 5))
+                        }),
+                    }
+                }
+            });
+        }
+
+        [Test]
+        public void TestSliderNearEdgeStackedOffscreen()
+        {
+            assertOffscreenSlider(new Beatmap<HitObject>
+            {
+                HitObjects = new List<HitObject>
+                {
+                    new Slider
+                    {
+                        StartTime = 3000,
+                        Position = playfield_centre,
+                        Path = new SliderPath(new[]
+                        {
+                            new PathControlPoint(new Vector2(0, 0), PathType.Linear),
+                            new PathControlPoint(new Vector2(0, -playfield_centre.Y + 5))
+                        }),
+                        StackHeight = 5
+                    }
+                }
+            });
+        }
+
+        [Test]
+        public void TestSliderOffscreenStart()
+        {
+            assertOffscreenSlider(new Beatmap<HitObject>
+            {
+                HitObjects = new List<HitObject>
+                {
+                    new Slider
+                    {
+                        StartTime = 3000,
+                        Position = new Vector2(0, 0),
+                        Path = new SliderPath(new[]
+                        {
+                            new PathControlPoint(new Vector2(0, 0), PathType.Linear),
+                            new PathControlPoint(playfield_centre)
+                        }),
+                    }
+                }
+            });
+        }
+
+        [Test]
+        public void TestSliderOffscreenEnd()
+        {
+            assertOffscreenSlider(new Beatmap<HitObject>
+            {
+                HitObjects = new List<HitObject>
+                {
+                    new Slider
+                    {
+                        StartTime = 3000,
+                        Position = playfield_centre,
+                        Path = new SliderPath(new[]
+                        {
+                            new PathControlPoint(new Vector2(0, 0), PathType.Linear),
+                            new PathControlPoint(-playfield_centre)
+                        }),
+                    }
+                }
+            });
+        }
+
+        [Test]
+        public void TestSliderOffscreenPath()
+        {
+            assertOffscreenSlider(new Beatmap<HitObject>
+            {
+                HitObjects = new List<HitObject>
+                {
+                    new Slider
+                    {
+                        StartTime = 3000,
+                        Position = playfield_centre,
+                        Path = new SliderPath(new[]
+                        {
+                            // Circular arc shoots over the top of the screen.
+                            new PathControlPoint(new Vector2(0, 0), PathType.PerfectCurve),
+                            new PathControlPoint(new Vector2(-100, -200)),
+                            new PathControlPoint(new Vector2(100, -200))
+                        }),
+                    }
+                }
+            });
+        }
+
+        private void assertOk(IBeatmap beatmap)
+        {
+            var context = new BeatmapVerifierContext(beatmap, new TestWorkingBeatmap(beatmap));
+            Assert.That(check.Run(context), Is.Empty);
+        }
+
+        private void assertOffscreenCircle(IBeatmap beatmap)
+        {
+            var context = new BeatmapVerifierContext(beatmap, new TestWorkingBeatmap(beatmap));
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckOffscreenObjects.IssueTemplateOffscreenCircle);
+        }
+
+        private void assertOffscreenSlider(IBeatmap beatmap)
+        {
+            var context = new BeatmapVerifierContext(beatmap, new TestWorkingBeatmap(beatmap));
+            var issues = check.Run(context).ToList();
+
+            Assert.That(issues, Has.Count.EqualTo(1));
+            Assert.That(issues.Single().Template is CheckOffscreenObjects.IssueTemplateOffscreenSlider);
+        }
+    }
+}

osu.Game.Rulesets.Osu.Tests/Editor/TestSceneOsuEditorSelectInvalidPath.cs

@@ -0,0 +1,46 @@
+// 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 NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Tests.Beatmaps;
+using osu.Game.Tests.Visual;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Tests.Editor
+{
+    public class TestSceneOsuEditorSelectInvalidPath : EditorTestScene
+    {
+        protected override Ruleset CreateEditorRuleset() => new OsuRuleset();
+
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset) => new TestBeatmap(ruleset, false);
+
+        [Test]
+        public void TestSelectDoesNotModify()
+        {
+            Slider slider = new Slider { StartTime = 0, Position = new Vector2(320, 40) };
+
+            PathControlPoint[] points =
+            {
+                new PathControlPoint(new Vector2(0), PathType.PerfectCurve),
+                new PathControlPoint(new Vector2(-100, 0)),
+                new PathControlPoint(new Vector2(100, 20))
+            };
+
+            int preSelectVersion = -1;
+            AddStep("add slider", () =>
+            {
+                slider.Path = new SliderPath(points);
+                EditorBeatmap.Add(slider);
+                preSelectVersion = slider.Path.Version.Value;
+            });
+
+            AddStep("select added slider", () => EditorBeatmap.SelectedHitObjects.Add(slider));
+
+            AddAssert("slider same path", () => slider.Path.Version.Value == preSelectVersion);
+        }
+    }
+}

osu.Game.Rulesets.Osu.Tests/Editor/TestScenePathControlPointVisualiser.cs

@@ -4,9 +4,11 @@
 using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Graphics;
+using osu.Framework.Graphics.UserInterface;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Tests.Visual;
@@ -14,7 +16,7 @@ using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Tests.Editor
 {
-    public class TestScenePathControlPointVisualiser : OsuTestScene
+    public class TestScenePathControlPointVisualiser : OsuManualInputManagerTestScene
     {
         private Slider slider;
         private PathControlPointVisualiser visualiser;
@@ -43,12 +45,145 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
             });
         }
 
+        [Test]
+        public void TestPerfectCurveTooManyPoints()
+        {
+            createVisualiser(true);
+
+            addControlPointStep(new Vector2(200), PathType.Bezier);
+            addControlPointStep(new Vector2(300));
+            addControlPointStep(new Vector2(500, 300));
+            addControlPointStep(new Vector2(700, 200));
+            addControlPointStep(new Vector2(500, 100));
+
+            // Must be both hovering and selecting the control point for the context menu to work.
+            moveMouseToControlPoint(1);
+            AddStep("select control point", () => visualiser.Pieces[1].IsSelected.Value = true);
+            addContextMenuItemStep("Perfect curve");
+
+            assertControlPointPathType(0, PathType.Bezier);
+            assertControlPointPathType(1, PathType.PerfectCurve);
+            assertControlPointPathType(3, PathType.Bezier);
+        }
+
+        [Test]
+        public void TestPerfectCurveLastThreePoints()
+        {
+            createVisualiser(true);
+
+            addControlPointStep(new Vector2(200), PathType.Bezier);
+            addControlPointStep(new Vector2(300));
+            addControlPointStep(new Vector2(500, 300));
+            addControlPointStep(new Vector2(700, 200));
+            addControlPointStep(new Vector2(500, 100));
+
+            moveMouseToControlPoint(2);
+            AddStep("select control point", () => visualiser.Pieces[2].IsSelected.Value = true);
+            addContextMenuItemStep("Perfect curve");
+
+            assertControlPointPathType(0, PathType.Bezier);
+            assertControlPointPathType(2, PathType.PerfectCurve);
+            assertControlPointPathType(4, null);
+        }
+
+        [Test]
+        public void TestPerfectCurveLastTwoPoints()
+        {
+            createVisualiser(true);
+
+            addControlPointStep(new Vector2(200), PathType.Bezier);
+            addControlPointStep(new Vector2(300));
+            addControlPointStep(new Vector2(500, 300));
+            addControlPointStep(new Vector2(700, 200));
+            addControlPointStep(new Vector2(500, 100));
+
+            moveMouseToControlPoint(3);
+            AddStep("select control point", () => visualiser.Pieces[3].IsSelected.Value = true);
+            addContextMenuItemStep("Perfect curve");
+
+            assertControlPointPathType(0, PathType.Bezier);
+            AddAssert("point 3 is not inherited", () => slider.Path.ControlPoints[3].Type != null);
+        }
+
+        [Test]
+        public void TestPerfectCurveTooManyPointsLinear()
+        {
+            createVisualiser(true);
+
+            addControlPointStep(new Vector2(200), PathType.Linear);
+            addControlPointStep(new Vector2(300));
+            addControlPointStep(new Vector2(500, 300));
+            addControlPointStep(new Vector2(700, 200));
+            addControlPointStep(new Vector2(500, 100));
+
+            // Must be both hovering and selecting the control point for the context menu to work.
+            moveMouseToControlPoint(1);
+            AddStep("select control point", () => visualiser.Pieces[1].IsSelected.Value = true);
+            addContextMenuItemStep("Perfect curve");
+
+            assertControlPointPathType(0, PathType.Linear);
+            assertControlPointPathType(1, PathType.PerfectCurve);
+            assertControlPointPathType(3, PathType.Linear);
+        }
+
+        [Test]
+        public void TestPerfectCurveChangeToBezier()
+        {
+            createVisualiser(true);
+
+            addControlPointStep(new Vector2(200), PathType.Bezier);
+            addControlPointStep(new Vector2(300), PathType.PerfectCurve);
+            addControlPointStep(new Vector2(500, 300));
+            addControlPointStep(new Vector2(700, 200), PathType.Bezier);
+            addControlPointStep(new Vector2(500, 100));
+
+            moveMouseToControlPoint(3);
+            AddStep("select control point", () => visualiser.Pieces[3].IsSelected.Value = true);
+            addContextMenuItemStep("Inherit");
+
+            assertControlPointPathType(0, PathType.Bezier);
+            assertControlPointPathType(1, PathType.Bezier);
+            assertControlPointPathType(3, null);
+        }
+
         private void createVisualiser(bool allowSelection) => AddStep("create visualiser", () => Child = visualiser = new PathControlPointVisualiser(slider, allowSelection)
         {
             Anchor = Anchor.Centre,
             Origin = Anchor.Centre
         });
 
-        private void addControlPointStep(Vector2 position) => AddStep($"add control point {position}", () => slider.Path.ControlPoints.Add(new PathControlPoint(position)));
+        private void addControlPointStep(Vector2 position) => addControlPointStep(position, null);
+
+        private void addControlPointStep(Vector2 position, PathType? type)
+        {
+            AddStep($"add {type} control point at {position}", () =>
+            {
+                slider.Path.ControlPoints.Add(new PathControlPoint(position, type));
+            });
+        }
+
+        private void moveMouseToControlPoint(int index)
+        {
+            AddStep($"move mouse to control point {index}", () =>
+            {
+                Vector2 position = slider.Path.ControlPoints[index].Position.Value;
+                InputManager.MoveMouseTo(visualiser.Pieces[0].Parent.ToScreenSpace(position));
+            });
+        }
+
+        private void assertControlPointPathType(int controlPointIndex, PathType? type)
+        {
+            AddAssert($"point {controlPointIndex} is {type}", () => slider.Path.ControlPoints[controlPointIndex].Type.Value == type);
+        }
+
+        private void addContextMenuItemStep(string contextMenuText)
+        {
+            AddStep($"click context menu item \"{contextMenuText}\"", () =>
+            {
+                MenuItem item = visualiser.ContextMenuItems[1].Items.FirstOrDefault(menuItem => menuItem.Text.Value == contextMenuText);
+
+                item?.Action?.Value();
+            });
+        }
     }
 }

osu.Game.Rulesets.Osu.Tests/Editor/TestSceneSliderControlPointPiece.cs

@@ -0,0 +1,175 @@
+// 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 NUnit.Framework;
+using osu.Framework.Utils;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles.Components;
+using osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders;
+using osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+using osuTK;
+using osuTK.Input;
+
+namespace osu.Game.Rulesets.Osu.Tests.Editor
+{
+    public class TestSceneSliderControlPointPiece : SelectionBlueprintTestScene
+    {
+        private Slider slider;
+        private DrawableSlider drawableObject;
+
+        [SetUp]
+        public void Setup() => Schedule(() =>
+        {
+            Clear();
+
+            slider = new Slider
+            {
+                Position = new Vector2(256, 192),
+                Path = new SliderPath(new[]
+                {
+                    new PathControlPoint(Vector2.Zero, PathType.PerfectCurve),
+                    new PathControlPoint(new Vector2(150, 150)),
+                    new PathControlPoint(new Vector2(300, 0), PathType.PerfectCurve),
+                    new PathControlPoint(new Vector2(400, 0)),
+                    new PathControlPoint(new Vector2(400, 150))
+                })
+            };
+
+            slider.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty { CircleSize = 2 });
+
+            Add(drawableObject = new DrawableSlider(slider));
+            AddBlueprint(new TestSliderBlueprint(drawableObject));
+        });
+
+        [Test]
+        public void TestDragControlPoint()
+        {
+            moveMouseToControlPoint(1);
+            AddStep("hold", () => InputManager.PressButton(MouseButton.Left));
+
+            addMovementStep(new Vector2(150, 50));
+            AddStep("release", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            assertControlPointPosition(1, new Vector2(150, 50));
+            assertControlPointType(0, PathType.PerfectCurve);
+        }
+
+        [Test]
+        public void TestDragControlPointAlmostLinearlyExterior()
+        {
+            moveMouseToControlPoint(1);
+            AddStep("hold", () => InputManager.PressButton(MouseButton.Left));
+
+            addMovementStep(new Vector2(400, 0.01f));
+            AddStep("release", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            assertControlPointPosition(1, new Vector2(400, 0.01f));
+            assertControlPointType(0, PathType.Bezier);
+        }
+
+        [Test]
+        public void TestDragControlPointPathRecovery()
+        {
+            moveMouseToControlPoint(1);
+            AddStep("hold", () => InputManager.PressButton(MouseButton.Left));
+
+            addMovementStep(new Vector2(400, 0.01f));
+            assertControlPointType(0, PathType.Bezier);
+
+            addMovementStep(new Vector2(150, 50));
+            AddStep("release", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            assertControlPointPosition(1, new Vector2(150, 50));
+            assertControlPointType(0, PathType.PerfectCurve);
+        }
+
+        [Test]
+        public void TestDragControlPointPathRecoveryOtherSegment()
+        {
+            moveMouseToControlPoint(4);
+            AddStep("hold", () => InputManager.PressButton(MouseButton.Left));
+
+            addMovementStep(new Vector2(350, 0.01f));
+            assertControlPointType(2, PathType.Bezier);
+
+            addMovementStep(new Vector2(150, 150));
+            AddStep("release", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            assertControlPointPosition(4, new Vector2(150, 150));
+            assertControlPointType(2, PathType.PerfectCurve);
+        }
+
+        [Test]
+        public void TestDragControlPointPathAfterChangingType()
+        {
+            AddStep("change type to bezier", () => slider.Path.ControlPoints[2].Type.Value = PathType.Bezier);
+            AddStep("add point", () => slider.Path.ControlPoints.Add(new PathControlPoint(new Vector2(500, 10))));
+            AddStep("change type to perfect", () => slider.Path.ControlPoints[3].Type.Value = PathType.PerfectCurve);
+
+            moveMouseToControlPoint(4);
+            AddStep("hold", () => InputManager.PressButton(MouseButton.Left));
+
+            assertControlPointType(3, PathType.PerfectCurve);
+
+            addMovementStep(new Vector2(350, 0.01f));
+            AddStep("release", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            assertControlPointPosition(4, new Vector2(350, 0.01f));
+            assertControlPointType(3, PathType.Bezier);
+        }
+
+        private void addMovementStep(Vector2 relativePosition)
+        {
+            AddStep($"move mouse to {relativePosition}", () =>
+            {
+                Vector2 position = slider.Position + relativePosition;
+                InputManager.MoveMouseTo(drawableObject.Parent.ToScreenSpace(position));
+            });
+        }
+
+        private void moveMouseToControlPoint(int index)
+        {
+            AddStep($"move mouse to control point {index}", () =>
+            {
+                Vector2 position = slider.Position + slider.Path.ControlPoints[index].Position.Value;
+                InputManager.MoveMouseTo(drawableObject.Parent.ToScreenSpace(position));
+            });
+        }
+
+        private void assertControlPointType(int index, PathType type) => AddAssert($"control point {index} is {type}", () => slider.Path.ControlPoints[index].Type.Value == type);
+
+        private void assertControlPointPosition(int index, Vector2 position) =>
+            AddAssert($"control point {index} at {position}", () => Precision.AlmostEquals(position, slider.Path.ControlPoints[index].Position.Value, 1));
+
+        private class TestSliderBlueprint : SliderSelectionBlueprint
+        {
+            public new SliderBodyPiece BodyPiece => base.BodyPiece;
+            public new TestSliderCircleBlueprint HeadBlueprint => (TestSliderCircleBlueprint)base.HeadBlueprint;
+            public new TestSliderCircleBlueprint TailBlueprint => (TestSliderCircleBlueprint)base.TailBlueprint;
+            public new PathControlPointVisualiser ControlPointVisualiser => base.ControlPointVisualiser;
+
+            public TestSliderBlueprint(DrawableSlider slider)
+                : base(slider)
+            {
+            }
+
+            protected override SliderCircleSelectionBlueprint CreateCircleSelectionBlueprint(DrawableSlider slider, SliderPosition position) => new TestSliderCircleBlueprint(slider, position);
+        }
+
+        private class TestSliderCircleBlueprint : SliderCircleSelectionBlueprint
+        {
+            public new HitCirclePiece CirclePiece => base.CirclePiece;
+
+            public TestSliderCircleBlueprint(DrawableSlider slider, SliderPosition position)
+                : base(slider, position)
+            {
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu.Tests/Editor/TestSceneSliderLengthValidity.cs

@@ -0,0 +1,198 @@
+// 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.Linq;
+using NUnit.Framework;
+using osu.Framework.Testing;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.UI;
+using osu.Game.Screens.Edit.Compose.Components;
+using osu.Game.Tests.Beatmaps;
+using osuTK;
+using osuTK.Input;
+
+namespace osu.Game.Rulesets.Osu.Tests.Editor
+{
+    [TestFixture]
+    public class TestSceneSliderLengthValidity : TestSceneOsuEditor
+    {
+        private OsuPlayfield playfield;
+
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset) => new TestBeatmap(Ruleset.Value, false);
+
+        public override void SetUpSteps()
+        {
+            base.SetUpSteps();
+            AddStep("get playfield", () => playfield = Editor.ChildrenOfType<OsuPlayfield>().First());
+            AddStep("seek to first timing point", () => EditorClock.Seek(Beatmap.Value.Beatmap.ControlPointInfo.TimingPoints.First().Time));
+        }
+
+        [Test]
+        public void TestDraggingStartingPointRemainsValid()
+        {
+            Slider slider = null;
+
+            AddStep("Add slider", () =>
+            {
+                slider = new Slider { StartTime = EditorClock.CurrentTime, Position = new Vector2(300) };
+
+                PathControlPoint[] points =
+                {
+                    new PathControlPoint(new Vector2(0), PathType.Linear),
+                    new PathControlPoint(new Vector2(100, 0)),
+                };
+
+                slider.Path = new SliderPath(points);
+                EditorBeatmap.Add(slider);
+            });
+
+            AddAssert("ensure object placed", () => EditorBeatmap.HitObjects.Count == 1);
+
+            moveMouse(new Vector2(300));
+            AddStep("select slider", () => InputManager.Click(MouseButton.Left));
+
+            double distanceBefore = 0;
+
+            AddStep("store distance", () => distanceBefore = slider.Path.Distance);
+
+            moveMouse(new Vector2(300, 300));
+
+            AddStep("begin drag", () => InputManager.PressButton(MouseButton.Left));
+            moveMouse(new Vector2(350, 300));
+            moveMouse(new Vector2(400, 300));
+            AddStep("end drag", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            AddAssert("slider length shrunk", () => slider.Path.Distance < distanceBefore);
+            AddAssert("ensure slider still has valid length", () => slider.Path.Distance > 0);
+        }
+
+        [Test]
+        public void TestDraggingEndingPointRemainsValid()
+        {
+            Slider slider = null;
+
+            AddStep("Add slider", () =>
+            {
+                slider = new Slider { StartTime = EditorClock.CurrentTime, Position = new Vector2(300) };
+
+                PathControlPoint[] points =
+                {
+                    new PathControlPoint(new Vector2(0), PathType.Linear),
+                    new PathControlPoint(new Vector2(100, 0)),
+                };
+
+                slider.Path = new SliderPath(points);
+                EditorBeatmap.Add(slider);
+            });
+
+            AddAssert("ensure object placed", () => EditorBeatmap.HitObjects.Count == 1);
+
+            moveMouse(new Vector2(300));
+            AddStep("select slider", () => InputManager.Click(MouseButton.Left));
+
+            double distanceBefore = 0;
+
+            AddStep("store distance", () => distanceBefore = slider.Path.Distance);
+
+            moveMouse(new Vector2(400, 300));
+
+            AddStep("begin drag", () => InputManager.PressButton(MouseButton.Left));
+            moveMouse(new Vector2(350, 300));
+            moveMouse(new Vector2(300, 300));
+            AddStep("end drag", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            AddAssert("slider length shrunk", () => slider.Path.Distance < distanceBefore);
+            AddAssert("ensure slider still has valid length", () => slider.Path.Distance > 0);
+        }
+
+        /// <summary>
+        /// If a control point is deleted which results in the slider becoming so short it can't exist,
+        /// for simplicity delete the slider rather than having it in an invalid state.
+        ///
+        /// Eventually we may need to change this, based on user feedback. I think it's likely enough of
+        /// an edge case that we won't get many complaints, though (and there's always the undo button).
+        /// </summary>
+        [Test]
+        public void TestDeletingPointCausesSliderDeletion()
+        {
+            AddStep("Add slider", () =>
+            {
+                Slider slider = new Slider { StartTime = EditorClock.CurrentTime, Position = new Vector2(300) };
+
+                PathControlPoint[] points =
+                {
+                    new PathControlPoint(new Vector2(0), PathType.PerfectCurve),
+                    new PathControlPoint(new Vector2(100, 0)),
+                    new PathControlPoint(new Vector2(0, 10))
+                };
+
+                slider.Path = new SliderPath(points);
+                EditorBeatmap.Add(slider);
+            });
+
+            AddAssert("ensure object placed", () => EditorBeatmap.HitObjects.Count == 1);
+
+            AddStep("select slider", () => InputManager.Click(MouseButton.Left));
+
+            moveMouse(new Vector2(400, 300));
+            AddStep("delete second point", () =>
+            {
+                InputManager.PressKey(Key.ShiftLeft);
+                InputManager.Click(MouseButton.Right);
+                InputManager.ReleaseKey(Key.ShiftLeft);
+            });
+
+            AddAssert("ensure object deleted", () => EditorBeatmap.HitObjects.Count == 0);
+        }
+
+        /// <summary>
+        /// If a scale operation is performed where a single slider is the only thing selected, the path's shape will change.
+        /// If the scale results in the path becoming too short, further mouse movement in the same direction will not change the shape.
+        /// </summary>
+        [Test]
+        public void TestScalingSliderTooSmallRemainsValid()
+        {
+            Slider slider = null;
+
+            AddStep("Add slider", () =>
+            {
+                slider = new Slider { StartTime = EditorClock.CurrentTime, Position = new Vector2(300, 200) };
+
+                PathControlPoint[] points =
+                {
+                    new PathControlPoint(new Vector2(0), PathType.Linear),
+                    new PathControlPoint(new Vector2(0, 50)),
+                    new PathControlPoint(new Vector2(0, 100))
+                };
+
+                slider.Path = new SliderPath(points);
+                EditorBeatmap.Add(slider);
+            });
+
+            AddAssert("ensure object placed", () => EditorBeatmap.HitObjects.Count == 1);
+
+            moveMouse(new Vector2(300));
+            AddStep("select slider", () => InputManager.Click(MouseButton.Left));
+
+            double distanceBefore = 0;
+
+            AddStep("store distance", () => distanceBefore = slider.Path.Distance);
+
+            AddStep("move mouse to handle", () => InputManager.MoveMouseTo(Editor.ChildrenOfType<SelectionBoxDragHandle>().Skip(1).First()));
+            AddStep("begin drag", () => InputManager.PressButton(MouseButton.Left));
+            moveMouse(new Vector2(300, 300));
+            moveMouse(new Vector2(300, 250));
+            moveMouse(new Vector2(300, 200));
+            AddStep("end drag", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            AddAssert("slider length shrunk", () => slider.Path.Distance < distanceBefore);
+            AddAssert("ensure slider still has valid length", () => slider.Path.Distance > 0);
+        }
+
+        private void moveMouse(Vector2 pos) =>
+            AddStep($"move mouse to {pos}", () => InputManager.MoveMouseTo(playfield.ToScreenSpace(pos)));
+    }
+}

osu.Game.Rulesets.Osu.Tests/Editor/TestSceneSliderPlacementBlueprint.cs

@@ -41,9 +41,7 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
             addClickStep(MouseButton.Left);
             addClickStep(MouseButton.Right);
 
-            assertPlaced(true);
-            assertLength(0);
-            assertControlPointType(0, PathType.Linear);
+            assertPlaced(false);
         }
 
         [Test]
@@ -276,6 +274,104 @@ namespace osu.Game.Rulesets.Osu.Tests.Editor
             assertControlPointType(0, PathType.Linear);
         }
 
+        [Test]
+        public void TestPlacePerfectCurveSegmentAlmostLinearlyExterior()
+        {
+            Vector2 startPosition = new Vector2(200);
+
+            addMovementStep(startPosition);
+            addClickStep(MouseButton.Left);
+
+            addMovementStep(startPosition + new Vector2(300, 0));
+            addClickStep(MouseButton.Left);
+
+            addMovementStep(startPosition + new Vector2(150, 0.1f));
+            addClickStep(MouseButton.Right);
+
+            assertPlaced(true);
+            assertControlPointCount(3);
+            assertControlPointType(0, PathType.Bezier);
+        }
+
+        [Test]
+        public void TestPlacePerfectCurveSegmentRecovery()
+        {
+            Vector2 startPosition = new Vector2(200);
+
+            addMovementStep(startPosition);
+            addClickStep(MouseButton.Left);
+
+            addMovementStep(startPosition + new Vector2(300, 0));
+            addClickStep(MouseButton.Left);
+
+            addMovementStep(startPosition + new Vector2(150, 0.1f)); // Should convert to bezier
+            addMovementStep(startPosition + new Vector2(400.0f, 50.0f)); // Should convert back to perfect
+            addClickStep(MouseButton.Right);
+
+            assertPlaced(true);
+            assertControlPointCount(3);
+            assertControlPointType(0, PathType.PerfectCurve);
+        }
+
+        [Test]
+        public void TestPlacePerfectCurveSegmentLarge()
+        {
+            Vector2 startPosition = new Vector2(400);
+
+            addMovementStep(startPosition);
+            addClickStep(MouseButton.Left);
+
+            addMovementStep(startPosition + new Vector2(220, 220));
+            addClickStep(MouseButton.Left);
+
+            // Playfield dimensions are 640 x 480.
+            // So a 440 x 440 bounding box should be ok.
+            addMovementStep(startPosition + new Vector2(-220, 220));
+            addClickStep(MouseButton.Right);
+
+            assertPlaced(true);
+            assertControlPointCount(3);
+            assertControlPointType(0, PathType.PerfectCurve);
+        }
+
+        [Test]
+        public void TestPlacePerfectCurveSegmentTooLarge()
+        {
+            Vector2 startPosition = new Vector2(480, 200);
+
+            addMovementStep(startPosition);
+            addClickStep(MouseButton.Left);
+
+            addMovementStep(startPosition + new Vector2(400, 400));
+            addClickStep(MouseButton.Left);
+
+            // Playfield dimensions are 640 x 480.
+            // So an 800 * 800 bounding box area should not be ok.
+            addMovementStep(startPosition + new Vector2(-400, 400));
+            addClickStep(MouseButton.Right);
+
+            assertPlaced(true);
+            assertControlPointCount(3);
+            assertControlPointType(0, PathType.Bezier);
+        }
+
+        [Test]
+        public void TestPlacePerfectCurveSegmentCompleteArc()
+        {
+            addMovementStep(new Vector2(400));
+            addClickStep(MouseButton.Left);
+
+            addMovementStep(new Vector2(600, 400));
+            addClickStep(MouseButton.Left);
+
+            addMovementStep(new Vector2(400, 410));
+            addClickStep(MouseButton.Right);
+
+            assertPlaced(true);
+            assertControlPointCount(3);
+            assertControlPointType(0, PathType.PerfectCurve);
+        }
+
         private void addMovementStep(Vector2 position) => AddStep($"move mouse to {position}", () => InputManager.MoveMouseTo(InputManager.ToScreenSpace(position)));
 
         private void addClickStep(MouseButton button)

osu.Game.Rulesets.Osu.Tests/Editor/TestSliderScaling.cs

@@ -0,0 +1,72 @@
+// 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.Linq;
+using NUnit.Framework;
+using osu.Framework.Testing;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.UI;
+using osu.Game.Screens.Edit.Compose.Components;
+using osu.Game.Tests.Beatmaps;
+using osuTK;
+using osuTK.Input;
+
+namespace osu.Game.Rulesets.Osu.Tests.Editor
+{
+    [TestFixture]
+    public class TestSliderScaling : TestSceneOsuEditor
+    {
+        private OsuPlayfield playfield;
+
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset) => new TestBeatmap(Ruleset.Value, false);
+
+        public override void SetUpSteps()
+        {
+            base.SetUpSteps();
+            AddStep("get playfield", () => playfield = Editor.ChildrenOfType<OsuPlayfield>().First());
+            AddStep("seek to first timing point", () => EditorClock.Seek(Beatmap.Value.Beatmap.ControlPointInfo.TimingPoints.First().Time));
+        }
+
+        [Test]
+        public void TestScalingLinearSlider()
+        {
+            Slider slider = null;
+
+            AddStep("Add slider", () =>
+            {
+                slider = new Slider { StartTime = EditorClock.CurrentTime, Position = new Vector2(300) };
+
+                PathControlPoint[] points =
+                {
+                    new PathControlPoint(new Vector2(0), PathType.Linear),
+                    new PathControlPoint(new Vector2(100, 0)),
+                };
+
+                slider.Path = new SliderPath(points);
+                EditorBeatmap.Add(slider);
+            });
+
+            AddAssert("ensure object placed", () => EditorBeatmap.HitObjects.Count == 1);
+
+            moveMouse(new Vector2(300));
+            AddStep("select slider", () => InputManager.Click(MouseButton.Left));
+
+            double distanceBefore = 0;
+
+            AddStep("store distance", () => distanceBefore = slider.Path.Distance);
+
+            AddStep("move mouse to handle", () => InputManager.MoveMouseTo(Editor.ChildrenOfType<SelectionBoxDragHandle>().Skip(1).First()));
+            AddStep("begin drag", () => InputManager.PressButton(MouseButton.Left));
+            moveMouse(new Vector2(300, 300));
+            AddStep("end drag", () => InputManager.ReleaseButton(MouseButton.Left));
+
+            AddAssert("slider length shrunk", () => slider.Path.Distance < distanceBefore);
+        }
+
+        private void moveMouse(Vector2 pos) =>
+            AddStep($"move mouse to {pos}", () => InputManager.MoveMouseTo(playfield.ToScreenSpace(pos)));
+    }
+}

osu.Game.Rulesets.Osu.Tests/Mods/TestSceneOsuModAutoplay.cs

@@ -33,7 +33,7 @@ namespace osu.Game.Rulesets.Osu.Tests.Mods
 
         private void runSpmTest(Mod mod)
         {
-            SpinnerSpmCounter spmCounter = null;
+            SpinnerSpmCalculator spmCalculator = null;
 
             CreateModTest(new ModTestData
             {
@@ -53,13 +53,13 @@ namespace osu.Game.Rulesets.Osu.Tests.Mods
                 PassCondition = () => Player.ScoreProcessor.JudgedHits >= 1
             });
 
-            AddUntilStep("fetch SPM counter", () =>
+            AddUntilStep("fetch SPM calculator", () =>
             {
-                spmCounter = this.ChildrenOfType<SpinnerSpmCounter>().SingleOrDefault();
-                return spmCounter != null;
+                spmCalculator = this.ChildrenOfType<SpinnerSpmCalculator>().SingleOrDefault();
+                return spmCalculator != null;
             });
 
-            AddUntilStep("SPM is correct", () => Precision.AlmostEquals(spmCounter.SpinsPerMinute, 477, 5));
+            AddUntilStep("SPM is correct", () => Precision.AlmostEquals(spmCalculator.Result.Value, 477, 5));
         }
     }
 }

osu.Game.Rulesets.Osu.Tests/Mods/TestSceneOsuModSpunOut.cs

@@ -47,8 +47,8 @@ namespace osu.Game.Rulesets.Osu.Tests.Mods
                 Beatmap = singleSpinnerBeatmap,
                 PassCondition = () =>
                 {
-                    var counter = Player.ChildrenOfType<SpinnerSpmCounter>().SingleOrDefault();
-                    return counter != null && Precision.AlmostEquals(counter.SpinsPerMinute, 286, 1);
+                    var counter = Player.ChildrenOfType<SpinnerSpmCalculator>().SingleOrDefault();
+                    return counter != null && Precision.AlmostEquals(counter.Result.Value, 286, 1);
                 }
             });
         }

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

@@ -16,7 +16,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             get
             {
                 if (content == null)
-                    base.Content.Add(content = new OsuInputManager(new RulesetInfo { ID = 0 }));
+                    base.Content.Add(content = new OsuInputManager(new OsuRuleset().RulesetInfo));
 
                 return content;
             }

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

@@ -78,7 +78,7 @@ namespace osu.Game.Rulesets.Osu.Tests
                 RelativeSizeAxes = Axes.Both;
             }
 
-            public Drawable GetDrawableComponent(ISkinComponent component) => throw new NotImplementedException();
+            public Drawable GetDrawableComponent(ISkinComponent component) => null;
 
             public Texture GetTexture(string componentName, WrapMode wrapModeS, WrapMode wrapModeT)
             {
@@ -98,9 +98,9 @@ namespace osu.Game.Rulesets.Osu.Tests
                 return null;
             }
 
-            public ISample GetSample(ISampleInfo sampleInfo) => throw new NotImplementedException();
+            public ISample GetSample(ISampleInfo sampleInfo) => null;
 
-            public IBindable<TValue> GetConfig<TLookup, TValue>(TLookup lookup) => throw new NotImplementedException();
+            public IBindable<TValue> GetConfig<TLookup, TValue>(TLookup lookup) => null;
 
             public event Action SourceChanged
             {

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

@@ -4,13 +4,22 @@
 using System;
 using NUnit.Framework;
 using osu.Framework.Allocation;
+using osu.Framework.Audio.Sample;
+using osu.Framework.Bindables;
 using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.OpenGL.Textures;
 using osu.Framework.Graphics.Shapes;
+using osu.Framework.Graphics.Textures;
+using osu.Framework.Input;
 using osu.Framework.Testing.Input;
 using osu.Framework.Utils;
+using osu.Game.Audio;
 using osu.Game.Configuration;
+using osu.Game.Rulesets.Osu.Skinning;
 using osu.Game.Rulesets.Osu.UI.Cursor;
 using osu.Game.Screens.Play;
+using osu.Game.Skinning;
 using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Tests
@@ -21,7 +30,7 @@ namespace osu.Game.Rulesets.Osu.Tests
         [Cached]
         private GameplayBeatmap gameplayBeatmap;
 
-        private ClickingCursorContainer lastContainer;
+        private OsuCursorContainer lastContainer;
 
         [Resolved]
         private OsuConfigManager config { get; set; }
@@ -48,12 +57,10 @@ namespace osu.Game.Rulesets.Osu.Tests
             {
                 config.SetValue(OsuSetting.AutoCursorSize, true);
                 gameplayBeatmap.BeatmapInfo.BaseDifficulty.CircleSize = val;
-                Scheduler.AddOnce(recreate);
+                Scheduler.AddOnce(() => loadContent(false));
             });
 
-            AddStep("test cursor container", recreate);
-
-            void recreate() => SetContents(() => new OsuInputManager(new OsuRuleset().RulesetInfo) { Child = new OsuCursorContainer() });
+            AddStep("test cursor container", () => loadContent(false));
         }
 
         [TestCase(1, 1)]
@@ -68,7 +75,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             AddStep($"adjust cs to {circleSize}", () => gameplayBeatmap.BeatmapInfo.BaseDifficulty.CircleSize = circleSize);
             AddStep("turn on autosizing", () => config.SetValue(OsuSetting.AutoCursorSize, true));
 
-            AddStep("load content", loadContent);
+            AddStep("load content", () => loadContent());
 
             AddUntilStep("cursor size correct", () => lastContainer.ActiveCursor.Scale.X == OsuCursorContainer.GetScaleForCircleSize(circleSize) * userScale);
 
@@ -82,18 +89,46 @@ namespace osu.Game.Rulesets.Osu.Tests
             AddUntilStep("cursor size correct", () => lastContainer.ActiveCursor.Scale.X == userScale);
         }
 
-        private void loadContent()
+        [Test]
+        public void TestTopLeftOrigin()
         {
-            SetContents(() => new MovingCursorInputManager
+            AddStep("load content", () => loadContent(false, () => new SkinProvidingContainer(new TopLeftCursorSkin())));
+        }
+
+        private void loadContent(bool automated = true, Func<SkinProvidingContainer> skinProvider = null)
+        {
+            SetContents(() =>
             {
-                Child = lastContainer = new ClickingCursorContainer
-                {
-                    RelativeSizeAxes = Axes.Both,
-                    Masking = true,
-                }
+                var inputManager = automated ? (InputManager)new MovingCursorInputManager() : new OsuInputManager(new OsuRuleset().RulesetInfo);
+                var skinContainer = skinProvider?.Invoke() ?? new SkinProvidingContainer(null);
+
+                lastContainer = automated ? new ClickingCursorContainer() : new OsuCursorContainer();
+
+                return inputManager.WithChild(skinContainer.WithChild(lastContainer));
             });
         }
 
+        private class TopLeftCursorSkin : ISkin
+        {
+            public Drawable GetDrawableComponent(ISkinComponent component) => null;
+            public Texture GetTexture(string componentName, WrapMode wrapModeS, WrapMode wrapModeT) => null;
+            public ISample GetSample(ISampleInfo sampleInfo) => null;
+
+            public IBindable<TValue> GetConfig<TLookup, TValue>(TLookup lookup)
+            {
+                switch (lookup)
+                {
+                    case OsuSkinConfiguration osuLookup:
+                        if (osuLookup == OsuSkinConfiguration.CursorCentre)
+                            return SkinUtils.As<TValue>(new BindableBool(false));
+
+                        break;
+                }
+
+                return null;
+            }
+        }
+
         private class ClickingCursorContainer : OsuCursorContainer
         {
             private bool pressed;

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

@@ -32,7 +32,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             {
                 Position = new Vector2(128, 128),
                 ComboIndex = 1,
-            }), null));
+            })));
         }
 
         private HitCircle prepareObject(HitCircle circle)

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

@@ -32,7 +32,7 @@ namespace osu.Game.Rulesets.Osu.Tests
 
             hitCircle.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());
 
-            Child = new SkinProvidingContainer(new DefaultSkin())
+            Child = new SkinProvidingContainer(new DefaultSkin(null))
             {
                 RelativeSizeAxes = Axes.Both,
                 Child = drawableHitCircle = new DrawableHitCircle(hitCircle)

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

@@ -57,7 +57,7 @@ namespace osu.Game.Rulesets.Osu.Tests
                     new Vector2(300, 0),
                 }),
                 RepeatCount = 1
-            }), null));
+            })));
         }
 
         [Test]

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

@@ -34,6 +34,18 @@ namespace osu.Game.Rulesets.Osu.Tests
 
         private List<JudgementResult> judgementResults;
 
+        [Test]
+        public void TestPressBothKeysSimultaneouslyAndReleaseOne()
+        {
+            performTest(new List<ReplayFrame>
+            {
+                new OsuReplayFrame { Position = Vector2.Zero, Actions = { OsuAction.LeftButton, OsuAction.RightButton }, Time = time_slider_start },
+                new OsuReplayFrame { Position = Vector2.Zero, Actions = { OsuAction.RightButton }, Time = time_during_slide_1 },
+            });
+
+            AddAssert("Tracking retained", assertMaxJudge);
+        }
+
         /// <summary>
         /// Scenario:
         /// - Press a key before a slider starts

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

@@ -37,7 +37,7 @@ namespace osu.Game.Rulesets.Osu.Tests
                 Position = new Vector2(256, 192),
                 ComboIndex = 1,
                 Duration = 1000,
-            }), null));
+            })));
 
             AddAssert("rotation is reset", () => dho.Result.RateAdjustedRotation == 0);
         }

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

@@ -21,6 +21,7 @@ using osu.Game.Rulesets.Osu.UI;
 using osu.Game.Rulesets.Replays;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Scoring;
+using osu.Game.Screens.Play;
 using osu.Game.Storyboards;
 using osu.Game.Tests.Visual;
 using osuTK;
@@ -168,13 +169,13 @@ namespace osu.Game.Rulesets.Osu.Tests
             double estimatedSpm = 0;
 
             addSeekStep(1000);
-            AddStep("retrieve spm", () => estimatedSpm = drawableSpinner.SpmCounter.SpinsPerMinute);
+            AddStep("retrieve spm", () => estimatedSpm = drawableSpinner.SpinsPerMinute.Value);
 
             addSeekStep(2000);
-            AddAssert("spm still valid", () => Precision.AlmostEquals(drawableSpinner.SpmCounter.SpinsPerMinute, estimatedSpm, 1.0));
+            AddAssert("spm still valid", () => Precision.AlmostEquals(drawableSpinner.SpinsPerMinute.Value, estimatedSpm, 1.0));
 
             addSeekStep(1000);
-            AddAssert("spm still valid", () => Precision.AlmostEquals(drawableSpinner.SpmCounter.SpinsPerMinute, estimatedSpm, 1.0));
+            AddAssert("spm still valid", () => Precision.AlmostEquals(drawableSpinner.SpinsPerMinute.Value, estimatedSpm, 1.0));
         }
 
         [TestCase(0.5)]
@@ -188,16 +189,16 @@ namespace osu.Game.Rulesets.Osu.Tests
             AddStep("retrieve spinner state", () =>
             {
                 expectedProgress = drawableSpinner.Progress;
-                expectedSpm = drawableSpinner.SpmCounter.SpinsPerMinute;
+                expectedSpm = drawableSpinner.SpinsPerMinute.Value;
             });
 
             addSeekStep(0);
 
-            AddStep("adjust track rate", () => Player.GameplayClockContainer.UserPlaybackRate.Value = rate);
+            AddStep("adjust track rate", () => ((MasterGameplayClockContainer)Player.GameplayClockContainer).UserPlaybackRate.Value = rate);
 
             addSeekStep(1000);
             AddAssert("progress almost same", () => Precision.AlmostEquals(expectedProgress, drawableSpinner.Progress, 0.05));
-            AddAssert("spm almost same", () => Precision.AlmostEquals(expectedSpm, drawableSpinner.SpmCounter.SpinsPerMinute, 2.0));
+            AddAssert("spm almost same", () => Precision.AlmostEquals(expectedSpm, drawableSpinner.SpinsPerMinute.Value, 2.0));
         }
 
         private Replay applyRateAdjustment(Replay scoreReplay, double rate) => new Replay

osu.Game.Rulesets.Osu.Tests/osu.Game.Rulesets.Osu.Tests.csproj

@@ -3,7 +3,7 @@
   <ItemGroup Label="Package References">
     <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
-    <PackageReference Include="NUnit" Version="3.13.1" />
+    <PackageReference Include="NUnit" Version="3.13.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
   </ItemGroup>

osu.Game.Rulesets.Osu/Edit/Blueprints/OsuSelectionBlueprint.cs

@@ -10,7 +10,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints
     public abstract class OsuSelectionBlueprint<T> : OverlaySelectionBlueprint
         where T : OsuHitObject
     {
-        protected new T HitObject => (T)DrawableObject.HitObject;
+        protected T HitObject => (T)DrawableObject.HitObject;
 
         protected override bool AlwaysShowWhenSelected => true;
 

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointPiece.cs

@@ -2,14 +2,18 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System;
+using System.Collections.Generic;
+using System.Linq;
 using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Cursor;
+using osu.Framework.Graphics.Primitives;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Input.Events;
+using osu.Framework.Utils;
 using osu.Game.Graphics;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Objects;
@@ -28,6 +32,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
     public class PathControlPointPiece : BlueprintPiece<Slider>, IHasTooltip
     {
         public Action<PathControlPointPiece, MouseButtonEvent> RequestSelection;
+        public List<PathControlPoint> PointsInSegment;
 
         public readonly BindableBool IsSelected = new BindableBool();
         public readonly PathControlPoint ControlPoint;
@@ -54,6 +59,15 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
             this.slider = slider;
             ControlPoint = controlPoint;
 
+            // we don't want to run the path type update on construction as it may inadvertently change the slider.
+            cachePoints(slider);
+
+            slider.Path.Version.BindValueChanged(_ =>
+            {
+                cachePoints(slider);
+                updatePathType();
+            });
+
             controlPoint.Type.BindValueChanged(_ => updateMarkerDisplay());
 
             Origin = Anchor.Centre;
@@ -150,6 +164,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
         protected override bool OnClick(ClickEvent e) => RequestSelection != null;
 
         private Vector2 dragStartPosition;
+        private PathType? dragPathType;
 
         protected override bool OnDragStart(DragStartEvent e)
         {
@@ -159,6 +174,8 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
             if (e.Button == MouseButton.Left)
             {
                 dragStartPosition = ControlPoint.Position.Value;
+                dragPathType = PointsInSegment[0].Type.Value;
+
                 changeHandler?.BeginChange();
                 return true;
             }
@@ -168,6 +185,10 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
 
         protected override void OnDrag(DragEvent e)
         {
+            Vector2[] oldControlPoints = slider.Path.ControlPoints.Select(cp => cp.Position.Value).ToArray();
+            var oldPosition = slider.Position;
+            var oldStartTime = slider.StartTime;
+
             if (ControlPoint == slider.Path.ControlPoints[0])
             {
                 // Special handling for the head control point - the position of the slider changes which means the snapped position and time have to be taken into account
@@ -184,10 +205,45 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
             }
             else
                 ControlPoint.Position.Value = dragStartPosition + (e.MousePosition - e.MouseDownPosition);
+
+            if (!slider.Path.HasValidLength)
+            {
+                for (var i = 0; i < slider.Path.ControlPoints.Count; i++)
+                    slider.Path.ControlPoints[i].Position.Value = oldControlPoints[i];
+
+                slider.Position = oldPosition;
+                slider.StartTime = oldStartTime;
+                return;
+            }
+
+            // Maintain the path type in case it got defaulted to bezier at some point during the drag.
+            PointsInSegment[0].Type.Value = dragPathType;
         }
 
         protected override void OnDragEnd(DragEndEvent e) => changeHandler?.EndChange();
 
+        private void cachePoints(Slider slider) => PointsInSegment = slider.Path.PointsInSegment(ControlPoint);
+
+        /// <summary>
+        /// Handles correction of invalid path types.
+        /// </summary>
+        private void updatePathType()
+        {
+            if (ControlPoint.Type.Value != PathType.PerfectCurve)
+                return;
+
+            if (PointsInSegment.Count > 3)
+                ControlPoint.Type.Value = PathType.Bezier;
+
+            if (PointsInSegment.Count != 3)
+                return;
+
+            ReadOnlySpan<Vector2> points = PointsInSegment.Select(p => p.Position.Value).ToArray();
+            RectangleF boundingBox = PathApproximator.CircularArcBoundingBox(points);
+            if (boundingBox.Width >= 640 || boundingBox.Height >= 480)
+                ControlPoint.Type.Value = PathType.Bezier;
+        }
+
         /// <summary>
         /// Updates the state of the circular control point marker.
         /// </summary>

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/PathControlPointVisualiser.cs

@@ -153,6 +153,34 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
             }
         }
 
+        /// <summary>
+        /// Attempts to set the given control point piece to the given path type.
+        /// If that would fail, try to change the path such that it instead succeeds
+        /// in a UX-friendly way.
+        /// </summary>
+        /// <param name="piece">The control point piece that we want to change the path type of.</param>
+        /// <param name="type">The path type we want to assign to the given control point piece.</param>
+        private void updatePathType(PathControlPointPiece piece, PathType? type)
+        {
+            int indexInSegment = piece.PointsInSegment.IndexOf(piece.ControlPoint);
+
+            switch (type)
+            {
+                case PathType.PerfectCurve:
+                    // Can't always create a circular arc out of 4 or more points,
+                    // so we split the segment into one 3-point circular arc segment
+                    // and one segment of the previous type.
+                    int thirdPointIndex = indexInSegment + 2;
+
+                    if (piece.PointsInSegment.Count > thirdPointIndex + 1)
+                        piece.PointsInSegment[thirdPointIndex].Type.Value = piece.PointsInSegment[0].Type.Value;
+
+                    break;
+            }
+
+            piece.ControlPoint.Type.Value = type;
+        }
+
         [Resolved(CanBeNull = true)]
         private IEditorChangeHandler changeHandler { get; set; }
 
@@ -218,7 +246,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
             var item = new PathTypeMenuItem(type, () =>
             {
                 foreach (var p in Pieces.Where(p => p.IsSelected.Value))
-                    p.ControlPoint.Type.Value = type;
+                    updatePathType(p, type);
             });
 
             if (countOfState == totalCount)

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/Components/SliderBodyPiece.cs

@@ -26,6 +26,10 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders.Components
             {
                 AccentColour = Color4.Transparent
             };
+
+            // SliderSelectionBlueprint relies on calling ReceivePositionalInputAt on this drawable to determine whether selection should occur.
+            // Without AlwaysPresent, a movement in a parent container (ie. the editor composer area resizing) could cause incorrect input handling.
+            AlwaysPresent = true;
         }
 
         [BackgroundDependencyLoader]

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderPlacementBlueprint.cs

@@ -30,7 +30,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 
         private InputManager inputManager;
 
-        private PlacementState state;
+        private SliderPlacementState state;
         private PathControlPoint segmentStart;
         private PathControlPoint cursor;
         private int currentSegmentLength;
@@ -58,7 +58,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
                 controlPointVisualiser = new PathControlPointVisualiser(HitObject, false)
             };
 
-            setState(PlacementState.Initial);
+            setState(SliderPlacementState.Initial);
         }
 
         protected override void LoadComplete()
@@ -73,12 +73,12 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 
             switch (state)
             {
-                case PlacementState.Initial:
+                case SliderPlacementState.Initial:
                     BeginPlacement();
                     HitObject.Position = ToLocalSpace(result.ScreenSpacePosition);
                     break;
 
-                case PlacementState.Body:
+                case SliderPlacementState.Body:
                     updateCursor();
                     break;
             }
@@ -91,11 +91,11 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 
             switch (state)
             {
-                case PlacementState.Initial:
+                case SliderPlacementState.Initial:
                     beginCurve();
                     break;
 
-                case PlacementState.Body:
+                case SliderPlacementState.Body:
                     if (canPlaceNewControlPoint(out var lastPoint))
                     {
                         // Place a new point by detatching the current cursor.
@@ -121,7 +121,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
 
         protected override void OnMouseUp(MouseUpEvent e)
         {
-            if (state == PlacementState.Body && e.Button == MouseButton.Right)
+            if (state == SliderPlacementState.Body && e.Button == MouseButton.Right)
                 endCurve();
             base.OnMouseUp(e);
         }
@@ -129,19 +129,22 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
         private void beginCurve()
         {
             BeginPlacement(commitStart: true);
-            setState(PlacementState.Body);
+            setState(SliderPlacementState.Body);
         }
 
         private void endCurve()
         {
             updateSlider();
-            EndPlacement(true);
+            EndPlacement(HitObject.Path.HasValidLength);
         }
 
         protected override void Update()
         {
             base.Update();
             updateSlider();
+
+            // Maintain the path type in case it got defaulted to bezier at some point during the drag.
+            updatePathType();
         }
 
         private void updatePathType()
@@ -204,7 +207,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             var lastPiece = controlPointVisualiser.Pieces.Single(p => p.ControlPoint == last);
 
             lastPoint = last;
-            return lastPiece?.IsHovered != true;
+            return lastPiece.IsHovered != true;
         }
 
         private void updateSlider()
@@ -216,12 +219,12 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             tailCirclePiece.UpdateFrom(HitObject.TailCircle);
         }
 
-        private void setState(PlacementState newState)
+        private void setState(SliderPlacementState newState)
         {
             state = newState;
         }
 
-        private enum PlacementState
+        private enum SliderPlacementState
         {
             Initial,
             Body,

osu.Game.Rulesets.Osu/Edit/Blueprints/Sliders/SliderSelectionBlueprint.cs

@@ -215,7 +215,7 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
             }
 
             // If there are 0 or 1 remaining control points, the slider is in a degenerate (single point) form and should be deleted
-            if (controlPoints.Count <= 1)
+            if (controlPoints.Count <= 1 || !slider.HitObject.Path.HasValidLength)
             {
                 placementHandler?.Delete(HitObject);
                 return;

osu.Game.Rulesets.Osu/Edit/Checks/CheckOffscreenObjects.cs

@@ -0,0 +1,115 @@
+// 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.Collections.Generic;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Checks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Edit.Checks
+{
+    public class CheckOffscreenObjects : ICheck
+    {
+        // A close approximation for the bounding box of the screen in gameplay on 4:3 aspect ratio.
+        // Uses gameplay space coordinates (512 x 384 playfield / 640 x 480 screen area).
+        // See https://github.com/ppy/osu/pull/12361#discussion_r612199777 for reference.
+        private const int min_x = -67;
+        private const int min_y = -60;
+        private const int max_x = 579;
+        private const int max_y = 428;
+
+        // The amount of milliseconds to step through a slider path at a time
+        // (higher = more performant, but higher false-negative chance).
+        private const int path_step_size = 5;
+
+        public CheckMetadata Metadata { get; } = new CheckMetadata(CheckCategory.Compose, "Offscreen hitobjects");
+
+        public IEnumerable<IssueTemplate> PossibleTemplates => new IssueTemplate[]
+        {
+            new IssueTemplateOffscreenCircle(this),
+            new IssueTemplateOffscreenSlider(this)
+        };
+
+        public IEnumerable<Issue> Run(BeatmapVerifierContext context)
+        {
+            foreach (var hitobject in context.Beatmap.HitObjects)
+            {
+                switch (hitobject)
+                {
+                    case Slider slider:
+                    {
+                        foreach (var issue in sliderIssues(slider))
+                            yield return issue;
+
+                        break;
+                    }
+
+                    case HitCircle circle:
+                    {
+                        if (isOffscreen(circle.StackedPosition, circle.Radius))
+                            yield return new IssueTemplateOffscreenCircle(this).Create(circle);
+
+                        break;
+                    }
+                }
+            }
+        }
+
+        /// <summary>
+        /// Steps through points on the slider to ensure the entire path is on-screen.
+        /// Returns at most one issue.
+        /// </summary>
+        /// <param name="slider">The slider whose path to check.</param>
+        /// <returns></returns>
+        private IEnumerable<Issue> sliderIssues(Slider slider)
+        {
+            for (int i = 0; i < slider.Distance; i += path_step_size)
+            {
+                double progress = i / slider.Distance;
+                Vector2 position = slider.StackedPositionAt(progress);
+
+                if (!isOffscreen(position, slider.Radius))
+                    continue;
+
+                // `SpanDuration` ensures we don't include reverses.
+                double time = slider.StartTime + progress * slider.SpanDuration;
+                yield return new IssueTemplateOffscreenSlider(this).Create(slider, time);
+
+                yield break;
+            }
+
+            // Above loop may skip the last position in the slider due to step size.
+            if (!isOffscreen(slider.StackedEndPosition, slider.Radius))
+                yield break;
+
+            yield return new IssueTemplateOffscreenSlider(this).Create(slider, slider.EndTime);
+        }
+
+        private bool isOffscreen(Vector2 position, double radius)
+        {
+            return position.X - radius < min_x || position.X + radius > max_x ||
+                   position.Y - radius < min_y || position.Y + radius > max_y;
+        }
+
+        public class IssueTemplateOffscreenCircle : IssueTemplate
+        {
+            public IssueTemplateOffscreenCircle(ICheck check)
+                : base(check, IssueType.Problem, "This circle goes offscreen on a 4:3 aspect ratio.")
+            {
+            }
+
+            public Issue Create(HitCircle circle) => new Issue(circle, this);
+        }
+
+        public class IssueTemplateOffscreenSlider : IssueTemplate
+        {
+            public IssueTemplateOffscreenSlider(ICheck check)
+                : base(check, IssueType.Problem, "This slider goes offscreen here on a 4:3 aspect ratio.")
+            {
+            }
+
+            public Issue Create(Slider slider, double offscreenTime) => new Issue(slider, this) { Time = offscreenTime };
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/DrawableOsuEditRuleset.cs

@@ -1,79 +0,0 @@
-// 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.Collections.Generic;
-using System.Linq;
-using osu.Framework.Graphics;
-using osu.Game.Beatmaps;
-using osu.Game.Rulesets.Mods;
-using osu.Game.Rulesets.Objects.Drawables;
-using osu.Game.Rulesets.Osu.Objects.Drawables;
-using osu.Game.Rulesets.Osu.UI;
-using osu.Game.Rulesets.UI;
-using osuTK;
-
-namespace osu.Game.Rulesets.Osu.Edit
-{
-    public class DrawableOsuEditRuleset : DrawableOsuRuleset
-    {
-        public DrawableOsuEditRuleset(Ruleset ruleset, IBeatmap beatmap, IReadOnlyList<Mod> mods)
-            : base(ruleset, beatmap, mods)
-        {
-        }
-
-        protected override Playfield CreatePlayfield() => new OsuEditPlayfield();
-
-        public override PlayfieldAdjustmentContainer CreatePlayfieldAdjustmentContainer() => new OsuPlayfieldAdjustmentContainer { Size = Vector2.One };
-
-        private class OsuEditPlayfield : OsuPlayfield
-        {
-            protected override GameplayCursorContainer CreateCursor() => null;
-
-            protected override void OnNewDrawableHitObject(DrawableHitObject d)
-            {
-                d.ApplyCustomUpdateState += updateState;
-            }
-
-            /// <summary>
-            /// Hit objects are intentionally made to fade out at a constant slower rate than in gameplay.
-            /// This allows a mapper to gain better historical context and use recent hitobjects as reference / snap points.
-            /// </summary>
-            private const double editor_hit_object_fade_out_extension = 700;
-
-            private void updateState(DrawableHitObject hitObject, ArmedState state)
-            {
-                if (state == ArmedState.Idle)
-                    return;
-
-                // adjust the visuals of certain object types to make them stay on screen for longer than usual.
-                switch (hitObject)
-                {
-                    default:
-                        // there are quite a few drawable hit types we don't want to extend (spinners, ticks etc.)
-                        return;
-
-                    case DrawableSlider _:
-                        // no specifics to sliders but let them fade slower below.
-                        break;
-
-                    case DrawableHitCircle circle: // also handles slider heads
-                        circle.ApproachCircle
-                              .FadeOutFromOne(editor_hit_object_fade_out_extension)
-                              .Expire();
-                        break;
-                }
-
-                // Get the existing fade out transform
-                var existing = hitObject.Transforms.LastOrDefault(t => t.TargetMember == nameof(Alpha));
-
-                if (existing == null)
-                    return;
-
-                hitObject.RemoveTransform(existing);
-
-                using (hitObject.BeginAbsoluteSequence(existing.StartTime))
-                    hitObject.FadeOut(editor_hit_object_fade_out_extension).Expire();
-            }
-        }
-    }
-}

osu.Game.Rulesets.Osu/Edit/DrawableOsuEditorRuleset.cs

@@ -0,0 +1,102 @@
+// 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.Collections.Generic;
+using System.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Game.Beatmaps;
+using osu.Game.Configuration;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Skinning.Default;
+using osu.Game.Rulesets.Osu.UI;
+using osu.Game.Rulesets.UI;
+using osuTK;
+
+namespace osu.Game.Rulesets.Osu.Edit
+{
+    public class DrawableOsuEditorRuleset : DrawableOsuRuleset
+    {
+        public DrawableOsuEditorRuleset(Ruleset ruleset, IBeatmap beatmap, IReadOnlyList<Mod> mods)
+            : base(ruleset, beatmap, mods)
+        {
+        }
+
+        protected override Playfield CreatePlayfield() => new OsuEditorPlayfield();
+
+        public override PlayfieldAdjustmentContainer CreatePlayfieldAdjustmentContainer() => new OsuPlayfieldAdjustmentContainer { Size = Vector2.One };
+
+        private class OsuEditorPlayfield : OsuPlayfield
+        {
+            private Bindable<bool> hitAnimations;
+
+            protected override GameplayCursorContainer CreateCursor() => null;
+
+            [BackgroundDependencyLoader]
+            private void load(OsuConfigManager config)
+            {
+                hitAnimations = config.GetBindable<bool>(OsuSetting.EditorHitAnimations);
+            }
+
+            protected override void OnNewDrawableHitObject(DrawableHitObject d)
+            {
+                d.ApplyCustomUpdateState += updateState;
+            }
+
+            /// <summary>
+            /// Hit objects are intentionally made to fade out at a constant slower rate than in gameplay.
+            /// This allows a mapper to gain better historical context and use recent hitobjects as reference / snap points.
+            /// </summary>
+            private const double editor_hit_object_fade_out_extension = 700;
+
+            private void updateState(DrawableHitObject hitObject, ArmedState state)
+            {
+                if (state == ArmedState.Idle || hitAnimations.Value)
+                    return;
+
+                if (hitObject is DrawableHitCircle circle)
+                {
+                    circle.ApproachCircle
+                          .FadeOutFromOne(editor_hit_object_fade_out_extension * 4)
+                          .Expire();
+
+                    circle.ApproachCircle.ScaleTo(1.1f, 300, Easing.OutQuint);
+                }
+
+                if (hitObject is IHasMainCirclePiece mainPieceContainer)
+                {
+                    // clear any explode animation logic.
+                    mainPieceContainer.CirclePiece.ApplyTransformsAt(hitObject.HitStateUpdateTime, true);
+                    mainPieceContainer.CirclePiece.ClearTransformsAfter(hitObject.HitStateUpdateTime, true);
+                }
+
+                if (hitObject is DrawableSliderRepeat repeat)
+                {
+                    repeat.Arrow.ApplyTransformsAt(hitObject.HitStateUpdateTime, true);
+                    repeat.Arrow.ClearTransformsAfter(hitObject.HitStateUpdateTime, true);
+                }
+
+                // adjust the visuals of top-level object types to make them stay on screen for longer than usual.
+                switch (hitObject)
+                {
+                    case DrawableSlider _:
+                    case DrawableHitCircle _:
+                        // Get the existing fade out transform
+                        var existing = hitObject.Transforms.LastOrDefault(t => t.TargetMember == nameof(Alpha));
+
+                        if (existing == null)
+                            return;
+
+                        hitObject.RemoveTransform(existing);
+
+                        using (hitObject.BeginAbsoluteSequence(hitObject.HitStateUpdateTime))
+                            hitObject.FadeOut(editor_hit_object_fade_out_extension).Expire();
+                        break;
+                }
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/OsuBeatmapVerifier.cs

@@ -0,0 +1,24 @@
+// 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.Collections.Generic;
+using System.Linq;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Checks.Components;
+using osu.Game.Rulesets.Osu.Edit.Checks;
+
+namespace osu.Game.Rulesets.Osu.Edit
+{
+    public class OsuBeatmapVerifier : IBeatmapVerifier
+    {
+        private readonly List<ICheck> checks = new List<ICheck>
+        {
+            new CheckOffscreenObjects()
+        };
+
+        public IEnumerable<Issue> Run(BeatmapVerifierContext context)
+        {
+            return checks.SelectMany(check => check.Run(context));
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/OsuBlueprintContainer.cs

@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles;
 using osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders;
@@ -18,7 +19,7 @@ namespace osu.Game.Rulesets.Osu.Edit
         {
         }
 
-        protected override SelectionHandler CreateSelectionHandler() => new OsuSelectionHandler();
+        protected override SelectionHandler<HitObject> CreateSelectionHandler() => new OsuSelectionHandler();
 
         public override OverlaySelectionBlueprint CreateBlueprintFor(DrawableHitObject hitObject)
         {

osu.Game.Rulesets.Osu/Edit/OsuHitObjectComposer.cs

@@ -32,7 +32,7 @@ namespace osu.Game.Rulesets.Osu.Edit
         }
 
         protected override DrawableRuleset<OsuHitObject> CreateDrawableRuleset(Ruleset ruleset, IBeatmap beatmap, IReadOnlyList<Mod> mods = null)
-            => new DrawableOsuEditRuleset(ruleset, beatmap, mods);
+            => new DrawableOsuEditorRuleset(ruleset, beatmap, mods);
 
         protected override IReadOnlyList<HitObjectCompositionTool> CompositionTools => new HitObjectCompositionTool[]
         {
@@ -147,7 +147,7 @@ namespace osu.Game.Rulesets.Osu.Edit
                 if (b.IsSelected)
                     continue;
 
-                var hitObject = (OsuHitObject)b.HitObject;
+                var hitObject = (OsuHitObject)b.Item;
 
                 Vector2? snap = checkSnap(hitObject.Position);
                 if (snap == null && hitObject.Position != hitObject.EndPosition)

osu.Game.Rulesets.Osu/Edit/OsuSelectionHandler.cs

@@ -7,6 +7,7 @@ using System.Linq;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Primitives;
 using osu.Framework.Utils;
+using osu.Game.Extensions;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Osu.Objects;
@@ -15,7 +16,7 @@ using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Edit
 {
-    public class OsuSelectionHandler : SelectionHandler
+    public class OsuSelectionHandler : EditorSelectionHandler
     {
         protected override void OnSelectionChanged()
         {
@@ -33,15 +34,16 @@ namespace osu.Game.Rulesets.Osu.Edit
         {
             base.OnOperationEnded();
             referenceOrigin = null;
+            referencePathTypes = null;
         }
 
-        public override bool HandleMovement(MoveSelectionEvent moveEvent)
+        public override bool HandleMovement(MoveSelectionEvent<HitObject> moveEvent)
         {
             var hitObjects = selectedMovableObjects;
 
             // this will potentially move the selection out of bounds...
             foreach (var h in hitObjects)
-                h.Position += moveEvent.InstantDelta;
+                h.Position += this.ScreenSpaceDeltaToParentSpace(moveEvent.ScreenSpaceDelta);
 
             // but this will be corrected.
             moveSelectionInBounds();
@@ -53,6 +55,12 @@ namespace osu.Game.Rulesets.Osu.Edit
         /// </summary>
         private Vector2? referenceOrigin;
 
+        /// <summary>
+        /// During a transform, the initial path types of a single selected slider are stored so they
+        /// can be maintained throughout the operation.
+        /// </summary>
+        private List<PathType?> referencePathTypes;
+
         public override bool HandleReverse()
         {
             var hitObjects = EditorBeatmap.SelectedHitObjects;
@@ -194,12 +202,16 @@ namespace osu.Game.Rulesets.Osu.Edit
 
         private void scaleSlider(Slider slider, Vector2 scale)
         {
+            referencePathTypes ??= slider.Path.ControlPoints.Select(p => p.Type.Value).ToList();
+
             Quad sliderQuad = getSurroundingQuad(slider.Path.ControlPoints.Select(p => p.Position.Value));
 
-            // Limit minimum distance between control points  after scaling to almost 0. Less than 0 causes the slider to flip, exactly 0 causes a crash through division by 0.
+            // Limit minimum distance between control points after scaling to almost 0. Less than 0 causes the slider to flip, exactly 0 causes a crash through division by 0.
             scale = Vector2.ComponentMax(new Vector2(Precision.FLOAT_EPSILON), sliderQuad.Size + scale) - sliderQuad.Size;
 
-            Vector2 pathRelativeDeltaScale = new Vector2(1 + scale.X / sliderQuad.Width, 1 + scale.Y / sliderQuad.Height);
+            Vector2 pathRelativeDeltaScale = new Vector2(
+                sliderQuad.Width == 0 ? 0 : 1 + scale.X / sliderQuad.Width,
+                sliderQuad.Height == 0 ? 0 : 1 + scale.Y / sliderQuad.Height);
 
             Queue<Vector2> oldControlPoints = new Queue<Vector2>();
 
@@ -209,11 +221,15 @@ namespace osu.Game.Rulesets.Osu.Edit
                 point.Position.Value *= pathRelativeDeltaScale;
             }
 
+            // Maintain the path types in case they were defaulted to bezier at some point during scaling
+            for (int i = 0; i < slider.Path.ControlPoints.Count; ++i)
+                slider.Path.ControlPoints[i].Type.Value = referencePathTypes[i];
+
             //if sliderhead or sliderend end up outside playfield, revert scaling.
             Quad scaledQuad = getSurroundingQuad(new OsuHitObject[] { slider });
             (bool xInBounds, bool yInBounds) = isQuadInBounds(scaledQuad);
 
-            if (xInBounds && yInBounds)
+            if (xInBounds && yInBounds && slider.Path.HasValidLength)
                 return;
 
             foreach (var point in slider.Path.ControlPoints)
@@ -359,8 +375,7 @@ namespace osu.Game.Rulesets.Osu.Edit
         /// <summary>
         /// All osu! hitobjects which can be moved/rotated/scaled.
         /// </summary>
-        private OsuHitObject[] selectedMovableObjects => EditorBeatmap.SelectedHitObjects
-                                                                      .OfType<OsuHitObject>()
+        private OsuHitObject[] selectedMovableObjects => SelectedItems.OfType<OsuHitObject>()
                                                                       .Where(h => !(h is Spinner))
                                                                       .ToArray();
 

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

@@ -0,0 +1,30 @@
+// 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.Collections.Generic;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Osu.Mods
+{
+    public class OsuModBarrelRoll : ModBarrelRoll<OsuHitObject>, IApplicableToDrawableHitObjects
+    {
+        public void ApplyToDrawableHitObjects(IEnumerable<DrawableHitObject> drawables)
+        {
+            foreach (var d in drawables)
+            {
+                d.OnUpdate += _ =>
+                {
+                    switch (d)
+                    {
+                        case DrawableHitCircle circle:
+                            circle.CirclePiece.Rotation = -CurrentRotation;
+                            break;
+                    }
+                };
+            }
+        }
+    }
+}

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

@@ -4,7 +4,6 @@
 using System.Collections.Generic;
 using System.Linq;
 using osu.Framework.Bindables;
-using osu.Framework.Graphics.Sprites;
 using osu.Game.Configuration;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Objects;
@@ -16,22 +15,8 @@ using osu.Game.Rulesets.UI;
 
 namespace osu.Game.Rulesets.Osu.Mods
 {
-    public class OsuModClassic : Mod, IApplicableToHitObject, IApplicableToDrawableHitObjects, IApplicableToDrawableRuleset<OsuHitObject>
+    public class OsuModClassic : ModClassic, IApplicableToHitObject, IApplicableToDrawableHitObjects, IApplicableToDrawableRuleset<OsuHitObject>
     {
-        public override string Name => "Classic";
-
-        public override string Acronym => "CL";
-
-        public override double ScoreMultiplier => 1;
-
-        public override IconUsage? Icon => FontAwesome.Solid.History;
-
-        public override string Description => "Feeling nostalgic?";
-
-        public override bool Ranked => false;
-
-        public override ModType Type => ModType.Conversion;
-
         [SettingSource("No slider head accuracy requirement", "Scores sliders proportionally to the number of ticks hit.")]
         public Bindable<bool> NoSliderHeadAccuracy { get; } = new BindableBool(true);
 

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

@@ -9,10 +9,12 @@ using osu.Framework.Graphics;
 using osu.Framework.Input;
 using osu.Framework.Input.Events;
 using osu.Framework.Utils;
+using osu.Game.Configuration;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Rulesets.UI;
 using osuTK;
 
 namespace osu.Game.Rulesets.Osu.Mods
@@ -23,6 +25,8 @@ namespace osu.Game.Rulesets.Osu.Mods
 
         private const float default_flashlight_size = 180;
 
+        private const double default_follow_delay = 120;
+
         private OsuFlashlight flashlight;
 
         public override Flashlight CreateFlashlight() => flashlight = new OsuFlashlight();
@@ -35,8 +39,25 @@ namespace osu.Game.Rulesets.Osu.Mods
             }
         }
 
+        public override void ApplyToDrawableRuleset(DrawableRuleset<OsuHitObject> drawableRuleset)
+        {
+            base.ApplyToDrawableRuleset(drawableRuleset);
+
+            flashlight.FollowDelay = FollowDelay.Value;
+        }
+
+        [SettingSource("Follow delay", "Milliseconds until the flashlight reaches the cursor")]
+        public BindableNumber<double> FollowDelay { get; } = new BindableDouble(default_follow_delay)
+        {
+            MinValue = default_follow_delay,
+            MaxValue = default_follow_delay * 10,
+            Precision = default_follow_delay,
+        };
+
         private class OsuFlashlight : Flashlight, IRequireHighFrequencyMousePosition
         {
+            public double FollowDelay { private get; set; }
+
             public OsuFlashlight()
             {
                 FlashlightSize = new Vector2(0, getSizeFor(0));
@@ -50,13 +71,11 @@ namespace osu.Game.Rulesets.Osu.Mods
 
             protected override bool OnMouseMove(MouseMoveEvent e)
             {
-                const double follow_delay = 120;
-
                 var position = FlashlightPosition;
                 var destination = e.MousePosition;
 
                 FlashlightPosition = Interpolation.ValueAt(
-                    Math.Min(Math.Abs(Clock.ElapsedFrameTime), follow_delay), position, destination, 0, follow_delay, Easing.Out);
+                    Math.Min(Math.Abs(Clock.ElapsedFrameTime), FollowDelay), position, destination, 0, FollowDelay, Easing.Out);
 
                 return base.OnMouseMove(e);
             }

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

@@ -9,6 +9,7 @@ namespace osu.Game.Rulesets.Osu.Mods
     {
         public override string Name => "Touch Device";
         public override string Acronym => "TD";
+        public override string Description => "Automatically applied to plays on devices with a touchscreen.";
         public override double ScoreMultiplier => 1;
 
         public override ModType Type => ModType.System;