Make ctrl-up/down change speed modifier of mods

osu.Game.Tests/Visual/SongSelect/TestScenePlaySongSelect.cs

@@ -87,6 +87,105 @@ public override void SetUpSteps()
             AddStep("delete all beatmaps", () => manager.Delete());
         }
 
+        [Test]
+        public void TestSpeedChange()
+        {
+            createSongSelect();
+            changeMods();
+
+            decreaseModSpeed();
+            AddAssert("half time activated at 0.95x", () => songSelect!.Mods.Value.OfType<ModHalfTime>().Single().SpeedChange.Value, () => Is.EqualTo(0.95).Within(0.005));
+
+            decreaseModSpeed();
+            AddAssert("half time speed changed to 0.9x", () => songSelect!.Mods.Value.OfType<ModHalfTime>().Single().SpeedChange.Value, () => Is.EqualTo(0.9).Within(0.005));
+
+            increaseModSpeed();
+            AddAssert("half time speed changed to 0.95x", () => songSelect!.Mods.Value.OfType<ModHalfTime>().Single().SpeedChange.Value, () => Is.EqualTo(0.95).Within(0.005));
+
+            increaseModSpeed();
+            AddAssert("no mods selected", () => songSelect!.Mods.Value.Count == 0);
+
+            increaseModSpeed();
+            AddAssert("double time activated at 1.05x", () => songSelect!.Mods.Value.OfType<ModDoubleTime>().Single().SpeedChange.Value, () => Is.EqualTo(1.05).Within(0.005));
+
+            increaseModSpeed();
+            AddAssert("double time speed changed to 1.1x", () => songSelect!.Mods.Value.OfType<ModDoubleTime>().Single().SpeedChange.Value, () => Is.EqualTo(1.1).Within(0.005));
+
+            decreaseModSpeed();
+            AddAssert("double time speed changed to 1.05x", () => songSelect!.Mods.Value.OfType<ModDoubleTime>().Single().SpeedChange.Value, () => Is.EqualTo(1.05).Within(0.005));
+
+            OsuModNightcore nc = new OsuModNightcore
+            {
+                SpeedChange = { Value = 1.05 }
+            };
+            changeMods(nc);
+
+            increaseModSpeed();
+            AddAssert("nightcore speed changed to 1.1x", () => songSelect!.Mods.Value.OfType<ModNightcore>().Single().SpeedChange.Value, () => Is.EqualTo(1.1).Within(0.005));
+
+            decreaseModSpeed();
+            AddAssert("nightcore speed changed to 1.05x", () => songSelect!.Mods.Value.OfType<ModNightcore>().Single().SpeedChange.Value, () => Is.EqualTo(1.05).Within(0.005));
+
+            decreaseModSpeed();
+            AddAssert("no mods selected", () => songSelect!.Mods.Value.Count == 0);
+
+            decreaseModSpeed();
+            AddAssert("daycore activated at 0.95x", () => songSelect!.Mods.Value.OfType<ModDaycore>().Single().SpeedChange.Value, () => Is.EqualTo(0.95).Within(0.005));
+
+            decreaseModSpeed();
+            AddAssert("daycore activated at 0.95x", () => songSelect!.Mods.Value.OfType<ModDaycore>().Single().SpeedChange.Value, () => Is.EqualTo(0.9).Within(0.005));
+
+            increaseModSpeed();
+            AddAssert("daycore activated at 0.95x", () => songSelect!.Mods.Value.OfType<ModDaycore>().Single().SpeedChange.Value, () => Is.EqualTo(0.95).Within(0.005));
+
+            OsuModDoubleTime dt = new OsuModDoubleTime
+            {
+                SpeedChange = { Value = 1.02 },
+                AdjustPitch = { Value = true },
+            };
+            changeMods(dt);
+
+            decreaseModSpeed();
+            AddAssert("half time activated at 0.97x", () => songSelect!.Mods.Value.OfType<ModHalfTime>().Single().SpeedChange.Value, () => Is.EqualTo(0.97).Within(0.005));
+            AddAssert("adjust pitch preserved", () => songSelect!.Mods.Value.OfType<ModHalfTime>().Single().AdjustPitch.Value, () => Is.True);
+
+            OsuModHalfTime ht = new OsuModHalfTime
+            {
+                SpeedChange = { Value = 0.97 },
+                AdjustPitch = { Value = true },
+            };
+            Mod[] modlist = { ht, new OsuModHardRock(), new OsuModHidden() };
+            changeMods(modlist);
+
+            increaseModSpeed();
+            AddAssert("double time activated at 1.02x", () => songSelect!.Mods.Value.OfType<ModDoubleTime>().Single().SpeedChange.Value, () => Is.EqualTo(1.02).Within(0.005));
+            AddAssert("double time activated at 1.02x", () => songSelect!.Mods.Value.OfType<ModDoubleTime>().Single().AdjustPitch.Value, () => Is.True);
+            AddAssert("HD still enabled", () => songSelect!.Mods.Value.OfType<ModHidden>().SingleOrDefault(), () => Is.Not.Null);
+            AddAssert("HR still enabled", () => songSelect!.Mods.Value.OfType<ModHardRock>().SingleOrDefault(), () => Is.Not.Null);
+
+            changeMods(new ModWindUp());
+            increaseModSpeed();
+            AddAssert("windup still active", () => songSelect!.Mods.Value.First() is ModWindUp);
+
+            changeMods(new ModAdaptiveSpeed());
+            increaseModSpeed();
+            AddAssert("adaptive speed still active", () => songSelect!.Mods.Value.First() is ModAdaptiveSpeed);
+
+            void increaseModSpeed() => AddStep("increase mod speed", () =>
+            {
+                InputManager.PressKey(Key.ControlLeft);
+                InputManager.Key(Key.Up);
+                InputManager.ReleaseKey(Key.ControlLeft);
+            });
+
+            void decreaseModSpeed() => AddStep("decrease mod speed", () =>
+            {
+                InputManager.PressKey(Key.ControlLeft);
+                InputManager.Key(Key.Down);
+                InputManager.ReleaseKey(Key.ControlLeft);
+            });
+        }
+
         [Test]
         public void TestPlaceholderBeatmapPresence()
         {

osu.Game/Input/Bindings/GlobalActionContainer.cs

@@ -182,6 +182,8 @@ public static IEnumerable<GlobalAction> GetGlobalActionsFor(GlobalActionCategory
             new KeyBinding(new[] { InputKey.Shift, InputKey.F2 }, GlobalAction.SelectPreviousRandom),
             new KeyBinding(InputKey.F3, GlobalAction.ToggleBeatmapOptions),
             new KeyBinding(InputKey.BackSpace, GlobalAction.DeselectAllMods),
+            new KeyBinding(new[] { InputKey.Control, InputKey.Up }, GlobalAction.IncreaseModSpeed),
+            new KeyBinding(new[] { InputKey.Control, InputKey.Down }, GlobalAction.DecreaseModSpeed),
         };
 
         private static IEnumerable<KeyBinding> audioControlKeyBindings => new[]
@@ -420,6 +422,12 @@ public enum GlobalAction
 
         [LocalisableDescription(typeof(GlobalActionKeyBindingStrings), nameof(GlobalActionKeyBindingStrings.StepReplayBackward))]
         StepReplayBackward,
+
+        [LocalisableDescription(typeof(GlobalActionKeyBindingStrings), nameof(GlobalActionKeyBindingStrings.IncreaseModSpeed))]
+        IncreaseModSpeed,
+
+        [LocalisableDescription(typeof(GlobalActionKeyBindingStrings), nameof(GlobalActionKeyBindingStrings.DecreaseModSpeed))]
+        DecreaseModSpeed,
     }
 
     public enum GlobalActionCategory

osu.Game/Localisation/GlobalActionKeyBindingStrings.cs

@@ -369,6 +369,16 @@ public static class GlobalActionKeyBindingStrings
         /// </summary>
         public static LocalisableString EditorToggleRotateControl => new TranslatableString(getKey(@"editor_toggle_rotate_control"), @"Toggle rotate control");
 
+        /// <summary>
+        /// "Increase mod speed"
+        /// </summary>
+        public static LocalisableString IncreaseModSpeed => new TranslatableString(getKey(@"increase_mod_speed"), @"Increase mod speed");
+
+        /// <summary>
+        /// "Decrease mod speed"
+        /// </summary>
+        public static LocalisableString DecreaseModSpeed => new TranslatableString(getKey(@"decrease_mod_speed"), @"Decrease mod speed");
+
         private static string getKey(string key) => $@"{prefix}:{key}";
     }
 }

osu.Game/Localisation/ToastStrings.cs

@@ -49,6 +49,11 @@ public static class ToastStrings
         /// </summary>
         public static LocalisableString UrlCopied => new TranslatableString(getKey(@"url_copied"), @"URL copied");
 
+        /// <summary>
+        /// "Speed changed to {0:N2}x"
+        /// </summary>
+        public static LocalisableString SpeedChangedTo(double speed) => new TranslatableString(getKey(@"speed_changed"), @"Speed changed to {0:N2}x", speed);
+
         private static string getKey(string key) => $@"{prefix}:{key}";
     }
 }

osu.Game/Overlays/Mods/ModSelectOverlay.cs

@@ -186,7 +186,7 @@ private void load(OsuGameBase game, OsuColour colours, AudioManager audio, OsuCo
                     Anchor = Anchor.BottomCentre,
                     Origin = Anchor.BottomCentre,
                     Height = 0
-                }
+                },
             });
 
             MainAreaContent.AddRange(new Drawable[]

osu.Game/Overlays/Mods/UserModSelectOverlay.cs

@@ -3,18 +3,30 @@
 
 using System.Collections.Generic;
 using System.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Input.Events;
+using osu.Game.Input.Bindings;
 using osu.Game.Rulesets.Mods;
+using osu.Game.Screens.Select;
 using osu.Game.Utils;
 
 namespace osu.Game.Overlays.Mods
 {
     public partial class UserModSelectOverlay : ModSelectOverlay
     {
+        private ModSpeedHotkeyHandler modSpeedHotkeyHandler = null!;
+
         public UserModSelectOverlay(OverlayColourScheme colourScheme = OverlayColourScheme.Green)
             : base(colourScheme)
         {
         }
 
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            Add(modSpeedHotkeyHandler = new ModSpeedHotkeyHandler());
+        }
+
         protected override ModColumn CreateModColumn(ModType modType) => new UserModColumn(modType, false);
 
         protected override IReadOnlyList<Mod> ComputeNewModsFromSelection(IReadOnlyList<Mod> oldSelection, IReadOnlyList<Mod> newSelection)
@@ -38,6 +50,20 @@ protected override IReadOnlyList<Mod> ComputeNewModsFromSelection(IReadOnlyList<
             return modsAfterRemoval.ToList();
         }
 
+        public override bool OnPressed(KeyBindingPressEvent<GlobalAction> e)
+        {
+            switch (e.Action)
+            {
+                case GlobalAction.IncreaseModSpeed:
+                    return modSpeedHotkeyHandler.ChangeSpeed(0.05, AllAvailableMods.Where(state => state.ValidForSelection.Value).Select(state => state.Mod));
+
+                case GlobalAction.DecreaseModSpeed:
+                    return modSpeedHotkeyHandler.ChangeSpeed(-0.05, AllAvailableMods.Where(state => state.ValidForSelection.Value).Select(state => state.Mod));
+            }
+
+            return base.OnPressed(e);
+        }
+
         private partial class UserModColumn : ModColumn
         {
             public UserModColumn(ModType modType, bool allowIncompatibleSelection)

osu.Game/Overlays/OSD/SpeedChangeToast.cs

@@ -0,0 +1,17 @@
+// 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.Configuration;
+using osu.Game.Input.Bindings;
+using osu.Game.Localisation;
+
+namespace osu.Game.Overlays.OSD
+{
+    public partial class SpeedChangeToast : Toast
+    {
+        public SpeedChangeToast(OsuConfigManager config, double newSpeed)
+            : base(ModSelectOverlayStrings.ModCustomisation, ToastStrings.SpeedChangedTo(newSpeed), config.LookupKeyBindings(GlobalAction.IncreaseModSpeed) + " / " + config.LookupKeyBindings(GlobalAction.DecreaseModSpeed))
+        {
+        }
+    }
+}

osu.Game/Screens/Select/ModSpeedHotkeyHandler.cs

@@ -0,0 +1,105 @@
+// 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.Framework.Utils;
+using osu.Game.Configuration;
+using osu.Game.Overlays;
+using osu.Game.Overlays.OSD;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Utils;
+
+namespace osu.Game.Screens.Select
+{
+    public partial class ModSpeedHotkeyHandler : Component
+    {
+        [Resolved]
+        private Bindable<IReadOnlyList<Mod>> selectedMods { get; set; } = null!;
+
+        [Resolved]
+        private OsuConfigManager config { get; set; } = null!;
+
+        [Resolved]
+        private OnScreenDisplay? onScreenDisplay { get; set; }
+
+        private ModRateAdjust? lastActiveRateAdjustMod;
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            selectedMods.BindValueChanged(val =>
+            {
+                lastActiveRateAdjustMod = val.NewValue.OfType<ModRateAdjust>().SingleOrDefault() ?? lastActiveRateAdjustMod;
+            }, true);
+        }
+
+        public bool ChangeSpeed(double delta, IEnumerable<Mod> availableMods)
+        {
+            double targetSpeed = (selectedMods.Value.OfType<ModRateAdjust>().SingleOrDefault()?.SpeedChange.Value ?? 1) + delta;
+
+            if (Precision.AlmostEquals(targetSpeed, 1, 0.005))
+            {
+                selectedMods.Value = selectedMods.Value.Where(m => m is not ModRateAdjust).ToList();
+                onScreenDisplay?.Display(new SpeedChangeToast(config, targetSpeed));
+                return true;
+            }
+
+            ModRateAdjust? targetMod;
+
+            if (lastActiveRateAdjustMod is ModDaycore || lastActiveRateAdjustMod is ModNightcore)
+            {
+                targetMod = targetSpeed < 1
+                    ? availableMods.OfType<ModDaycore>().SingleOrDefault()
+                    : availableMods.OfType<ModNightcore>().SingleOrDefault();
+            }
+            else
+            {
+                targetMod = targetSpeed < 1
+                    ? availableMods.OfType<ModHalfTime>().SingleOrDefault()
+                    : availableMods.OfType<ModDoubleTime>().SingleOrDefault();
+            }
+
+            if (targetMod == null)
+                return false;
+
+            // preserve other settings from latest rate adjust mod instance seen
+            if (lastActiveRateAdjustMod != null)
+            {
+                foreach (var (_, sourceProperty) in lastActiveRateAdjustMod.GetSettingsSourceProperties())
+                {
+                    if (sourceProperty.Name == nameof(ModRateAdjust.SpeedChange))
+                        continue;
+
+                    var targetProperty = targetMod.GetType().GetProperty(sourceProperty.Name);
+
+                    if (targetProperty == null)
+                        continue;
+
+                    var targetBindable = (IBindable)targetProperty.GetValue(targetMod)!;
+                    var sourceBindable = (IBindable)sourceProperty.GetValue(lastActiveRateAdjustMod)!;
+
+                    if (targetBindable.GetType() != sourceBindable.GetType())
+                        continue;
+
+                    lastActiveRateAdjustMod.CopyAdjustedSetting(targetBindable, sourceBindable);
+                }
+            }
+
+            targetMod.SpeedChange.Value = targetSpeed;
+
+            var intendedMods = selectedMods.Value.Where(m => m is not ModRateAdjust).Append(targetMod).ToList();
+
+            if (!ModUtils.CheckCompatibleSet(intendedMods))
+                return false;
+
+            selectedMods.Value = intendedMods;
+            onScreenDisplay?.Display(new SpeedChangeToast(config, targetMod.SpeedChange.Value));
+            return true;
+        }
+    }
+}

osu.Game/Screens/Select/SongSelect.cs

@@ -39,6 +39,7 @@
 using osu.Game.Screens.Select.Details;
 using osu.Game.Screens.Select.Options;
 using osu.Game.Skinning;
+using osu.Game.Utils;
 using osuTK;
 using osuTK.Graphics;
 using osuTK.Input;
@@ -98,6 +99,9 @@ public abstract partial class SongSelect : ScreenWithBeatmapBackground, IKeyBind
             new OsuMenuItem(@"Select", MenuItemType.Highlighted, () => FinaliseSelection(getBeatmap()))
         };
 
+        [Resolved]
+        private OsuGameBase game { get; set; } = null!;
+
         [Resolved]
         private Bindable<IReadOnlyList<Mod>> selectedMods { get; set; } = null!;
 
@@ -133,6 +137,7 @@ public abstract partial class SongSelect : ScreenWithBeatmapBackground, IKeyBind
         private double audioFeedbackLastPlaybackTime;
 
         private IDisposable? modSelectOverlayRegistration;
+        private ModSpeedHotkeyHandler modSpeedHotkeyHandler = null!;
 
         private AdvancedStats advancedStats = null!;
 
@@ -319,6 +324,7 @@ private void load(AudioManager audio, OsuColour colours, ManageCollectionsDialog
                 {
                     RelativeSizeAxes = Axes.Both,
                 },
+                modSpeedHotkeyHandler = new ModSpeedHotkeyHandler(),
             });
 
             if (ShowFooter)
@@ -1007,11 +1013,20 @@ public void ClearScores(BeatmapInfo? beatmapInfo)
 
         public virtual bool OnPressed(KeyBindingPressEvent<GlobalAction> e)
         {
+            if (!this.IsCurrentScreen()) return false;
+
+            switch (e.Action)
+            {
+                case GlobalAction.IncreaseModSpeed:
+                    return modSpeedHotkeyHandler.ChangeSpeed(0.05, ModUtils.FlattenMods(game.AvailableMods.Value.SelectMany(kv => kv.Value)));
+
+                case GlobalAction.DecreaseModSpeed:
+                    return modSpeedHotkeyHandler.ChangeSpeed(-0.05, ModUtils.FlattenMods(game.AvailableMods.Value.SelectMany(kv => kv.Value)));
+            }
+
             if (e.Repeat)
                 return false;
 
-            if (!this.IsCurrentScreen()) return false;
-
             switch (e.Action)
             {
                 case GlobalAction.Select: