Merge branch 'master' into timeline-adjustments

osu.Android.props

@@ -52,6 +52,6 @@
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="ppy.osu.Game.Resources" Version="2021.412.0" />
-    <PackageReference Include="ppy.osu.Framework.Android" Version="2021.413.0" />
+    <PackageReference Include="ppy.osu.Framework.Android" Version="2021.415.0" />
   </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.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.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;

osu.Game.Tests/NonVisual/DifficultyAdjustmentModCombinationsTest.cs

@@ -144,6 +144,7 @@ namespace osu.Game.Tests.NonVisual
         {
             public override string Name => nameof(ModA);
             public override string Acronym => nameof(ModA);
+            public override string Description => string.Empty;
             public override double ScoreMultiplier => 1;
 
             public override Type[] IncompatibleMods => new[] { typeof(ModIncompatibleWithA), typeof(ModIncompatibleWithAAndB) };
@@ -152,6 +153,7 @@ namespace osu.Game.Tests.NonVisual
         private class ModB : Mod
         {
             public override string Name => nameof(ModB);
+            public override string Description => string.Empty;
             public override string Acronym => nameof(ModB);
             public override double ScoreMultiplier => 1;
 
@@ -162,6 +164,7 @@ namespace osu.Game.Tests.NonVisual
         {
             public override string Name => nameof(ModC);
             public override string Acronym => nameof(ModC);
+            public override string Description => string.Empty;
             public override double ScoreMultiplier => 1;
         }
 
@@ -169,6 +172,7 @@ namespace osu.Game.Tests.NonVisual
         {
             public override string Name => $"Incompatible With {nameof(ModA)}";
             public override string Acronym => $"Incompatible With {nameof(ModA)}";
+            public override string Description => string.Empty;
             public override double ScoreMultiplier => 1;
 
             public override Type[] IncompatibleMods => new[] { typeof(ModA) };
@@ -187,6 +191,7 @@ namespace osu.Game.Tests.NonVisual
         {
             public override string Name => $"Incompatible With {nameof(ModA)} and {nameof(ModB)}";
             public override string Acronym => $"Incompatible With {nameof(ModA)} and {nameof(ModB)}";
+            public override string Description => string.Empty;
             public override double ScoreMultiplier => 1;
 
             public override Type[] IncompatibleMods => new[] { typeof(ModA), typeof(ModB) };

osu.Game.Tests/Online/TestAPIModJsonSerialization.cs

@@ -140,6 +140,7 @@ namespace osu.Game.Tests.Online
         {
             public override string Name => "Test Mod";
             public override string Acronym => "TM";
+            public override string Description => "This is a test mod.";
             public override double ScoreMultiplier => 1;
 
             [SettingSource("Test")]
@@ -156,6 +157,7 @@ namespace osu.Game.Tests.Online
         {
             public override string Name => "Test Mod";
             public override string Acronym => "TMTR";
+            public override string Description => "This is a test mod.";
             public override double ScoreMultiplier => 1;
 
             [SettingSource("Initial rate", "The starting speed of the track")]

osu.Game.Tests/Online/TestAPIModMessagePackSerialization.cs

@@ -100,6 +100,7 @@ namespace osu.Game.Tests.Online
         {
             public override string Name => "Test Mod";
             public override string Acronym => "TM";
+            public override string Description => "This is a test mod.";
             public override double ScoreMultiplier => 1;
 
             [SettingSource("Test")]
@@ -116,6 +117,7 @@ namespace osu.Game.Tests.Online
         {
             public override string Name => "Test Mod";
             public override string Acronym => "TMTR";
+            public override string Description => "This is a test mod.";
             public override double ScoreMultiplier => 1;
 
             [SettingSource("Initial rate", "The starting speed of the track")]
@@ -150,6 +152,7 @@ namespace osu.Game.Tests.Online
         {
             public override string Name => "Test Mod";
             public override string Acronym => "TM";
+            public override string Description => "This is a test mod.";
             public override double ScoreMultiplier => 1;
 
             [SettingSource("Test")]

osu.Game.Tests/Visual/Background/TestSceneUserDimBackgrounds.cs

@@ -65,6 +65,21 @@ namespace osu.Game.Tests.Visual.Background
             stack.Push(songSelect = new DummySongSelect());
         });
 
+        /// <summary>
+        /// User settings should always be ignored on song select screen.
+        /// </summary>
+        [Test]
+        public void TestUserSettingsIgnoredOnSongSelect()
+        {
+            setupUserSettings();
+            AddUntilStep("Screen is undimmed", () => songSelect.IsBackgroundUndimmed());
+            AddUntilStep("Screen using background blur", () => songSelect.IsBackgroundBlur());
+            performFullSetup();
+            AddStep("Exit to song select", () => player.Exit());
+            AddUntilStep("Screen is undimmed", () => songSelect.IsBackgroundUndimmed());
+            AddUntilStep("Screen using background blur", () => songSelect.IsBackgroundBlur());
+        }
+
         /// <summary>
         /// Check if <see cref="PlayerLoader"/> properly triggers the visual settings preview when a user hovers over the visual settings panel.
         /// </summary>
@@ -227,17 +242,6 @@ namespace osu.Game.Tests.Visual.Background
                 songSelect.IsBackgroundUndimmed() && songSelect.IsBackgroundCurrent() && songSelect.CheckBackgroundBlur(results.ExpectedBackgroundBlur));
         }
 
-        /// <summary>
-        /// Check if background gets undimmed and unblurred when leaving <see cref="Player"/>  for <see cref="PlaySongSelect"/>
-        /// </summary>
-        [Test]
-        public void TestTransitionOut()
-        {
-            performFullSetup();
-            AddStep("Exit to song select", () => player.Exit());
-            AddUntilStep("Screen is undimmed and user blur removed", () => songSelect.IsBackgroundUndimmed() && songSelect.IsBlurCorrect());
-        }
-
         /// <summary>
         /// Check if hovering on the visual settings dialogue after resuming from player still previews the background dim.
         /// </summary>
@@ -333,7 +337,7 @@ namespace osu.Game.Tests.Visual.Background
 
             public bool IsBackgroundVisible() => background.CurrentAlpha == 1;
 
-            public bool IsBlurCorrect() => background.CurrentBlur == new Vector2(BACKGROUND_BLUR);
+            public bool IsBackgroundBlur() => background.CurrentBlur == new Vector2(BACKGROUND_BLUR);
 
             public bool CheckBackgroundBlur(Vector2 expected) => background.CurrentBlur == expected;
 

osu.Game.Tests/Visual/Editing/TestSceneEditorSummaryTimeline.cs

@@ -5,7 +5,6 @@ using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.Osu;
-using osu.Game.Rulesets.Osu.Beatmaps;
 using osu.Game.Screens.Edit;
 using osu.Game.Screens.Edit.Components.Timelines.Summary;
 using osuTK;
@@ -16,18 +15,28 @@ namespace osu.Game.Tests.Visual.Editing
     public class TestSceneEditorSummaryTimeline : EditorClockTestScene
     {
         [Cached(typeof(EditorBeatmap))]
-        private readonly EditorBeatmap editorBeatmap = new EditorBeatmap(new OsuBeatmap());
+        private readonly EditorBeatmap editorBeatmap;
 
-        [BackgroundDependencyLoader]
+        public TestSceneEditorSummaryTimeline()
-        private void load()
         {
-            Beatmap.Value = CreateWorkingBeatmap(new OsuRuleset().RulesetInfo);
+            editorBeatmap = new EditorBeatmap(CreateBeatmap(new OsuRuleset().RulesetInfo));
+        }
 
-            Add(new SummaryTimeline
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            AddStep("create timeline", () =>
             {
-                Anchor = Anchor.Centre,
+                // required for track
-                Origin = Anchor.Centre,
+                Beatmap.Value = CreateWorkingBeatmap(editorBeatmap.PlayableBeatmap);
-                Size = new Vector2(500, 50)
+
+                Add(new SummaryTimeline
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Size = new Vector2(500, 50)
+                });
             });
         }
     }

osu.Game.Tests/Visual/Gameplay/TestScenePlayerLoader.cs

@@ -25,6 +25,7 @@ using osu.Game.Rulesets.Scoring;
 using osu.Game.Scoring;
 using osu.Game.Screens.Play;
 using osu.Game.Screens.Play.PlayerSettings;
+using osu.Game.Utils;
 using osuTK.Input;
 
 namespace osu.Game.Tests.Visual.Gameplay
@@ -48,6 +49,9 @@ namespace osu.Game.Tests.Visual.Gameplay
         [Cached]
         private readonly VolumeOverlay volumeOverlay;
 
+        [Cached(typeof(BatteryInfo))]
+        private readonly LocalBatteryInfo batteryInfo = new LocalBatteryInfo();
+
         private readonly ChangelogOverlay changelogOverlay;
 
         public TestScenePlayerLoader()
@@ -288,6 +292,33 @@ namespace osu.Game.Tests.Visual.Gameplay
             }
         }
 
+        [TestCase(false, 1.0, false)] // not charging, above cutoff --> no warning
+        [TestCase(true, 0.1, false)] // charging, below cutoff --> no warning
+        [TestCase(false, 0.25, true)] // not charging, at cutoff --> warning
+        public void TestLowBatteryNotification(bool isCharging, double chargeLevel, bool shouldWarn)
+        {
+            AddStep("reset notification lock", () => sessionStatics.GetBindable<bool>(Static.LowBatteryNotificationShownOnce).Value = false);
+
+            // set charge status and level
+            AddStep("load player", () => resetPlayer(false, () =>
+            {
+                batteryInfo.SetCharging(isCharging);
+                batteryInfo.SetChargeLevel(chargeLevel);
+            }));
+            AddUntilStep("wait for player", () => player?.LoadState == LoadState.Ready);
+            AddAssert($"notification {(shouldWarn ? "triggered" : "not triggered")}", () => notificationOverlay.UnreadCount.Value == (shouldWarn ? 1 : 0));
+            AddStep("click notification", () =>
+            {
+                var scrollContainer = (OsuScrollContainer)notificationOverlay.Children.Last();
+                var flowContainer = scrollContainer.Children.OfType<FillFlowContainer<NotificationSection>>().First();
+                var notification = flowContainer.First();
+
+                InputManager.MoveMouseTo(notification);
+                InputManager.Click(MouseButton.Left);
+            });
+            AddUntilStep("wait for player load", () => player.IsLoaded);
+        }
+
         [Test]
         public void TestEpilepsyWarningEarlyExit()
         {
@@ -321,6 +352,7 @@ namespace osu.Game.Tests.Visual.Gameplay
             public override string Name => string.Empty;
             public override string Acronym => string.Empty;
             public override double ScoreMultiplier => 1;
+            public override string Description => string.Empty;
 
             public bool Applied { get; private set; }
 
@@ -348,5 +380,29 @@ namespace osu.Game.Tests.Visual.Gameplay
                     throw new TimeoutException();
             }
         }
+
+        /// <summary>
+        /// Mutable dummy BatteryInfo class for <see cref="TestScenePlayerLoader.TestLowBatteryNotification"/>
+        /// </summary>
+        /// <inheritdoc/>
+        private class LocalBatteryInfo : BatteryInfo
+        {
+            private bool isCharging = true;
+            private double chargeLevel = 1;
+
+            public override bool IsCharging => isCharging;
+
+            public override double ChargeLevel => chargeLevel;
+
+            public void SetCharging(bool value)
+            {
+                isCharging = value;
+            }
+
+            public void SetChargeLevel(double value)
+            {
+                chargeLevel = value;
+            }
+        }
     }
 }

osu.Game.Tests/Visual/UserInterface/TestSceneModButton.cs

@@ -57,6 +57,8 @@ namespace osu.Game.Tests.Visual.UserInterface
         private abstract class TestMod : Mod, IApplicableMod
         {
             public override double ScoreMultiplier => 1.0;
+
+            public override string Description => "This is a test mod.";
         }
     }
 }

osu.Game.Tests/Visual/UserInterface/TestSceneModSettings.cs

@@ -226,6 +226,8 @@ namespace osu.Game.Tests.Visual.UserInterface
         {
             public override double ScoreMultiplier => 1.0;
 
+            public override string Description => "This is a customisable test mod.";
+
             public override ModType Type => ModType.Conversion;
 
             [SettingSource("Sample float", "Change something for a mod")]

osu.Game/Configuration/SessionStatics.cs

@@ -16,6 +16,7 @@ namespace osu.Game.Configuration
         {
             SetDefault(Static.LoginOverlayDisplayed, false);
             SetDefault(Static.MutedAudioNotificationShownOnce, false);
+            SetDefault(Static.LowBatteryNotificationShownOnce, false);
             SetDefault(Static.LastHoverSoundPlaybackTime, (double?)null);
             SetDefault<APISeasonalBackgrounds>(Static.SeasonalBackgrounds, null);
         }
@@ -25,6 +26,7 @@ namespace osu.Game.Configuration
     {
         LoginOverlayDisplayed,
         MutedAudioNotificationShownOnce,
+        LowBatteryNotificationShownOnce,
 
         /// <summary>
         /// Info about seasonal backgrounds available fetched from API - see <see cref="APISeasonalBackgrounds"/>.

osu.Game/OsuGameBase.cs

@@ -40,6 +40,7 @@ using osu.Game.Rulesets;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Scoring;
 using osu.Game.Skinning;
+using osu.Game.Utils;
 using osuTK.Input;
 using RuntimeInfo = osu.Framework.RuntimeInfo;
 
@@ -156,6 +157,8 @@ namespace osu.Game
 
         protected override UserInputManager CreateUserInputManager() => new OsuUserInputManager();
 
+        protected virtual BatteryInfo CreateBatteryInfo() => null;
+
         /// <summary>
         /// The maximum volume at which audio tracks should playback. This can be set lower than 1 to create some head-room for sound effects.
         /// </summary>
@@ -281,6 +284,11 @@ namespace osu.Game
             dependencies.Cache(KeyBindingStore = new KeyBindingStore(contextFactory, RulesetStore));
             dependencies.Cache(SettingsStore = new SettingsStore(contextFactory));
             dependencies.Cache(RulesetConfigCache = new RulesetConfigCache(SettingsStore));
+
+            var powerStatus = CreateBatteryInfo();
+            if (powerStatus != null)
+                dependencies.CacheAs(powerStatus);
+
             dependencies.Cache(new SessionStatics());
             dependencies.Cache(new OsuColour());
 

osu.Game/Rulesets/Mods/Mod.cs

@@ -49,7 +49,7 @@ namespace osu.Game.Rulesets.Mods
         /// The user readable description of this mod.
         /// </summary>
         [JsonIgnore]
-        public virtual string Description => string.Empty;
+        public abstract string Description { get; }
 
         /// <summary>
         /// The tooltip to display for this mod when used in a <see cref="ModIcon"/>.

osu.Game/Rulesets/Mods/ModNoMod.cs

@@ -12,6 +12,7 @@ namespace osu.Game.Rulesets.Mods
     {
         public override string Name => "No Mod";
         public override string Acronym => "NM";
+        public override string Description => "No mods applied.";
         public override double ScoreMultiplier => 1;
         public override IconUsage? Icon => FontAwesome.Solid.Ban;
         public override ModType Type => ModType.System;

osu.Game/Rulesets/Objects/Drawables/DrawableHitObject.cs

@@ -56,8 +56,8 @@ namespace osu.Game.Rulesets.Objects.Drawables
 
         public virtual IEnumerable<HitSampleInfo> GetSamples() => HitObject.Samples;
 
-        private readonly Lazy<List<DrawableHitObject>> nestedHitObjects = new Lazy<List<DrawableHitObject>>();
+        private readonly List<DrawableHitObject> nestedHitObjects = new List<DrawableHitObject>();
-        public IReadOnlyList<DrawableHitObject> NestedHitObjects => nestedHitObjects.IsValueCreated ? nestedHitObjects.Value : (IReadOnlyList<DrawableHitObject>)Array.Empty<DrawableHitObject>();
+        public IReadOnlyList<DrawableHitObject> NestedHitObjects => nestedHitObjects;
 
         /// <summary>
         /// Whether this object should handle any user input events.
@@ -249,7 +249,7 @@ namespace osu.Game.Rulesets.Objects.Drawables
                 // Must be done before the nested DHO is added to occur before the nested Apply()!
                 drawableNested.ParentHitObject = this;
 
-                nestedHitObjects.Value.Add(drawableNested);
+                nestedHitObjects.Add(drawableNested);
                 AddNestedHitObject(drawableNested);
             }
 
@@ -305,19 +305,16 @@ namespace osu.Game.Rulesets.Objects.Drawables
             if (Samples != null)
                 Samples.Samples = null;
 
-            if (nestedHitObjects.IsValueCreated)
+            foreach (var obj in nestedHitObjects)
             {
-                foreach (var obj in nestedHitObjects.Value)
+                obj.OnNewResult -= onNewResult;
-                {
+                obj.OnRevertResult -= onRevertResult;
-                    obj.OnNewResult -= onNewResult;
+                obj.ApplyCustomUpdateState -= onApplyCustomUpdateState;
-                    obj.OnRevertResult -= onRevertResult;
-                    obj.ApplyCustomUpdateState -= onApplyCustomUpdateState;
-                }
-
-                nestedHitObjects.Value.Clear();
-                ClearNestedHitObjects();
             }
 
+            nestedHitObjects.Clear();
+            ClearNestedHitObjects();
+
             HitObject.DefaultsApplied -= onDefaultsApplied;
 
             OnFree();

osu.Game/Rulesets/UI/Playfield.cs

@@ -66,7 +66,7 @@ namespace osu.Game.Rulesets.UI
 
                 var enumerable = HitObjectContainer.Objects;
 
-                if (nestedPlayfields.IsValueCreated)
+                if (nestedPlayfields.Count != 0)
                     enumerable = enumerable.Concat(NestedPlayfields.SelectMany(p => p.AllHitObjects));
 
                 return enumerable;
@@ -76,9 +76,9 @@ namespace osu.Game.Rulesets.UI
         /// <summary>
         /// All <see cref="Playfield"/>s nested inside this <see cref="Playfield"/>.
         /// </summary>
-        public IEnumerable<Playfield> NestedPlayfields => nestedPlayfields.IsValueCreated ? nestedPlayfields.Value : Enumerable.Empty<Playfield>();
+        public IEnumerable<Playfield> NestedPlayfields => nestedPlayfields;
 
-        private readonly Lazy<List<Playfield>> nestedPlayfields = new Lazy<List<Playfield>>();
+        private readonly List<Playfield> nestedPlayfields = new List<Playfield>();
 
         /// <summary>
         /// Whether judgements should be displayed by this and and all nested <see cref="Playfield"/>s.
@@ -217,7 +217,7 @@ namespace osu.Game.Rulesets.UI
             otherPlayfield.HitObjectUsageBegan += h => HitObjectUsageBegan?.Invoke(h);
             otherPlayfield.HitObjectUsageFinished += h => HitObjectUsageFinished?.Invoke(h);
 
-            nestedPlayfields.Value.Add(otherPlayfield);
+            nestedPlayfields.Add(otherPlayfield);
         }
 
         protected override void LoadComplete()
@@ -279,12 +279,7 @@ namespace osu.Game.Rulesets.UI
                 return true;
             }
 
-            bool removedFromNested = false;
+            return nestedPlayfields.Any(p => p.Remove(hitObject));
-
-            if (nestedPlayfields.IsValueCreated)
-                removedFromNested = nestedPlayfields.Value.Any(p => p.Remove(hitObject));
-
-            return removedFromNested;
         }
 
         /// <summary>
@@ -429,10 +424,7 @@ namespace osu.Game.Rulesets.UI
                 return;
             }
 
-            if (!nestedPlayfields.IsValueCreated)
+            foreach (var p in nestedPlayfields)
-                return;
-
-            foreach (var p in nestedPlayfields.Value)
                 p.SetKeepAlive(hitObject, keepAlive);
         }
 
@@ -444,10 +436,7 @@ namespace osu.Game.Rulesets.UI
             foreach (var (_, entry) in lifetimeEntryMap)
                 entry.KeepAlive = true;
 
-            if (!nestedPlayfields.IsValueCreated)
+            foreach (var p in nestedPlayfields)
-                return;
-
-            foreach (var p in nestedPlayfields.Value)
                 p.KeepAllAlive();
         }
 
@@ -461,10 +450,7 @@ namespace osu.Game.Rulesets.UI
             {
                 HitObjectContainer.PastLifetimeExtension = value;
 
-                if (!nestedPlayfields.IsValueCreated)
+                foreach (var nested in nestedPlayfields)
-                    return;
-
-                foreach (var nested in nestedPlayfields.Value)
                     nested.PastLifetimeExtension = value;
             }
         }
@@ -479,10 +465,7 @@ namespace osu.Game.Rulesets.UI
             {
                 HitObjectContainer.FutureLifetimeExtension = value;
 
-                if (!nestedPlayfields.IsValueCreated)
+                foreach (var nested in nestedPlayfields)
-                    return;
-
-                foreach (var nested in nestedPlayfields.Value)
                     nested.FutureLifetimeExtension = value;
             }
         }

osu.Game/Screens/Backgrounds/BackgroundScreenBeatmap.cs

@@ -27,9 +27,12 @@ namespace osu.Game.Screens.Backgrounds
         private WorkingBeatmap beatmap;
 
         /// <summary>
-        /// Whether or not user-configured settings relating to brightness of elements should be ignored
+        /// Whether or not user-configured settings relating to brightness of elements should be ignored.
         /// </summary>
-        public readonly Bindable<bool> IgnoreUserSettings = new Bindable<bool>();
+        /// <remarks>
+        /// Beatmap background screens should not apply user settings by default.
+        /// </remarks>
+        public readonly Bindable<bool> IgnoreUserSettings = new Bindable<bool>(true);
 
         public readonly Bindable<bool> StoryboardReplacesBackground = new Bindable<bool>();
 

osu.Game/Screens/Edit/Components/Timelines/Summary/Parts/BreakPart.cs

@@ -28,7 +28,7 @@ namespace osu.Game.Screens.Edit.Components.Timelines.Summary.Parts
             }
 
             [BackgroundDependencyLoader]
-            private void load(OsuColour colours) => Colour = colours.Yellow;
+            private void load(OsuColour colours) => Colour = colours.GreyCarmineLight;
         }
     }
 }

osu.Game/Screens/Edit/Components/Timelines/Summary/Parts/GroupVisualisation.cs

@@ -39,7 +39,7 @@ namespace osu.Game.Screens.Edit.Components.Timelines.Summary.Parts
                     return;
                 }
 
-                Colour = controlPoints.Any(c => c is TimingControlPoint) ? colours.YellowDark : colours.Green;
+                Colour = Group.ControlPoints.First().GetRepresentingColour(colours);
             }, true);
         }
     }

osu.Game/Screens/Edit/Components/Timelines/Summary/SummaryTimeline.cs

@@ -38,6 +38,7 @@ namespace osu.Game.Screens.Edit.Components.Timelines.Summary
                 },
                 new Container
                 {
+                    Name = "centre line",
                     RelativeSizeAxes = Axes.Both,
                     Colour = colours.Gray5,
                     Children = new Drawable[]
@@ -45,7 +46,7 @@ namespace osu.Game.Screens.Edit.Components.Timelines.Summary
                         new Circle
                         {
                             Anchor = Anchor.CentreLeft,
-                            Origin = Anchor.CentreRight,
+                            Origin = Anchor.Centre,
                             Size = new Vector2(5)
                         },
                         new Box
@@ -59,7 +60,7 @@ namespace osu.Game.Screens.Edit.Components.Timelines.Summary
                         new Circle
                         {
                             Anchor = Anchor.CentreRight,
-                            Origin = Anchor.CentreLeft,
+                            Origin = Anchor.Centre,
                             Size = new Vector2(5)
                         },
                     }
@@ -69,7 +70,7 @@ namespace osu.Game.Screens.Edit.Components.Timelines.Summary
                     Anchor = Anchor.Centre,
                     Origin = Anchor.Centre,
                     RelativeSizeAxes = Axes.Both,
-                    Height = 0.25f
+                    Height = 0.10f
                 }
             };
         }

osu.Game/Screens/Edit/Components/Timelines/Summary/Visualisations/DurationVisualisation.cs

@@ -2,7 +2,6 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using osu.Framework.Graphics;
-using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
 
 namespace osu.Game.Screens.Edit.Components.Timelines.Summary.Visualisations
@@ -10,19 +9,15 @@ namespace osu.Game.Screens.Edit.Components.Timelines.Summary.Visualisations
     /// <summary>
     /// Represents a spanning point on a timeline part.
     /// </summary>
-    public class DurationVisualisation : Container
+    public class DurationVisualisation : Circle
     {
         protected DurationVisualisation(double startTime, double endTime)
         {
-            Masking = true;
-            CornerRadius = 5;
-
             RelativePositionAxes = Axes.X;
             RelativeSizeAxes = Axes.Both;
+
             X = (float)startTime;
             Width = (float)(endTime - startTime);
-
-            AddInternal(new Box { RelativeSizeAxes = Axes.Both });
         }
     }
 }

osu.Game/Screens/Edit/Components/Timelines/Summary/Visualisations/PointVisualisation.cs

@@ -9,7 +9,7 @@ namespace osu.Game.Screens.Edit.Components.Timelines.Summary.Visualisations
     /// <summary>
     /// Represents a singular point on a timeline part.
     /// </summary>
-    public class PointVisualisation : Box
+    public class PointVisualisation : Circle
     {
         public const float MAX_WIDTH = 4;
 

osu.Game/Screens/Play/PlayerLoader.cs

@@ -24,6 +24,7 @@ using osu.Game.Overlays.Notifications;
 using osu.Game.Screens.Menu;
 using osu.Game.Screens.Play.PlayerSettings;
 using osu.Game.Users;
+using osu.Game.Utils;
 using osuTK;
 using osuTK.Graphics;
 
@@ -112,6 +113,9 @@ namespace osu.Game.Screens.Play
         [Resolved]
         private AudioManager audioManager { get; set; }
 
+        [Resolved(CanBeNull = true)]
+        private BatteryInfo batteryInfo { get; set; }
+
         public PlayerLoader(Func<Player> createPlayer)
         {
             this.createPlayer = createPlayer;
@@ -121,6 +125,7 @@ namespace osu.Game.Screens.Play
         private void load(SessionStatics sessionStatics)
         {
             muteWarningShownOnce = sessionStatics.GetBindable<bool>(Static.MutedAudioNotificationShownOnce);
+            batteryWarningShownOnce = sessionStatics.GetBindable<bool>(Static.LowBatteryNotificationShownOnce);
 
             InternalChild = (content = new LogoTrackingContainer
             {
@@ -196,6 +201,7 @@ namespace osu.Game.Screens.Play
             Scheduler.Add(new ScheduledDelegate(pushWhenLoaded, Clock.CurrentTime + 1800, 0));
 
             showMuteWarningIfNeeded();
+            showBatteryWarningIfNeeded();
         }
 
         public override void OnResuming(IScreen last)
@@ -470,5 +476,48 @@ namespace osu.Game.Screens.Play
         }
 
         #endregion
+
+        #region Low battery warning
+
+        private Bindable<bool> batteryWarningShownOnce;
+
+        private void showBatteryWarningIfNeeded()
+        {
+            if (batteryInfo == null) return;
+
+            if (!batteryWarningShownOnce.Value)
+            {
+                if (!batteryInfo.IsCharging && batteryInfo.ChargeLevel <= 0.25)
+                {
+                    notificationOverlay?.Post(new BatteryWarningNotification());
+                    batteryWarningShownOnce.Value = true;
+                }
+            }
+        }
+
+        private class BatteryWarningNotification : SimpleNotification
+        {
+            public override bool IsImportant => true;
+
+            public BatteryWarningNotification()
+            {
+                Text = "Your battery level is low! Charge your device to prevent interruptions during gameplay.";
+            }
+
+            [BackgroundDependencyLoader]
+            private void load(OsuColour colours, NotificationOverlay notificationOverlay)
+            {
+                Icon = FontAwesome.Solid.BatteryQuarter;
+                IconBackgound.Colour = colours.RedDark;
+
+                Activated = delegate
+                {
+                    notificationOverlay.Hide();
+                    return true;
+                };
+            }
+        }
+
+        #endregion
     }
 }

osu.Game/Utils/BatteryInfo.cs

@@ -0,0 +1,18 @@
+// 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.
+
+namespace osu.Game.Utils
+{
+    /// <summary>
+    /// Provides access to the system's power status.
+    /// </summary>
+    public abstract class BatteryInfo
+    {
+        /// <summary>
+        /// The charge level of the battery, from 0 to 1.
+        /// </summary>
+        public abstract double ChargeLevel { get; }
+
+        public abstract bool IsCharging { get; }
+    }
+}

osu.Game/osu.Game.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup Label="Project">
     <TargetFramework>netstandard2.1</TargetFramework>
     <OutputType>Library</OutputType>
@@ -29,7 +29,7 @@
     <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="5.0.0" />
     <PackageReference Include="Microsoft.NETCore.Targets" Version="3.1.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
-    <PackageReference Include="ppy.osu.Framework" Version="2021.413.0" />
+    <PackageReference Include="ppy.osu.Framework" Version="2021.415.0" />
     <PackageReference Include="ppy.osu.Game.Resources" Version="2021.412.0" />
     <PackageReference Include="Sentry" Version="3.2.0" />
     <PackageReference Include="SharpCompress" Version="0.28.1" />

osu.iOS.props

@@ -70,7 +70,7 @@
     <Reference Include="System.Net.Http" />
   </ItemGroup>
   <ItemGroup Label="Package References">
-    <PackageReference Include="ppy.osu.Framework.iOS" Version="2021.413.0" />
+    <PackageReference Include="ppy.osu.Framework.iOS" Version="2021.415.0" />
     <PackageReference Include="ppy.osu.Game.Resources" Version="2021.412.0" />
   </ItemGroup>
   <!-- See https://github.com/dotnet/runtime/issues/35988 (can be removed after Xamarin uses net5.0 / net6.0) -->
@@ -93,7 +93,7 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.2.6" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite.Core" Version="2.2.6" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
-    <PackageReference Include="ppy.osu.Framework" Version="2021.413.0" />
+    <PackageReference Include="ppy.osu.Framework" Version="2021.415.0" />
     <PackageReference Include="SharpCompress" Version="0.28.1" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="SharpRaven" Version="2.4.0" />

osu.iOS/OsuGameIOS.cs

@@ -5,6 +5,8 @@ using System;
 using Foundation;
 using osu.Game;
 using osu.Game.Updater;
+using osu.Game.Utils;
+using Xamarin.Essentials;
 
 namespace osu.iOS
 {
@@ -13,5 +15,14 @@ namespace osu.iOS
         public override Version AssemblyVersion => new Version(NSBundle.MainBundle.InfoDictionary["CFBundleVersion"].ToString());
 
         protected override UpdateManager CreateUpdateManager() => new SimpleUpdateManager();
+
+        protected override BatteryInfo CreateBatteryInfo() => new IOSBatteryInfo();
+
+        private class IOSBatteryInfo : BatteryInfo
+        {
+            public override double ChargeLevel => Battery.ChargeLevel;
+
+            public override bool IsCharging => Battery.PowerSource != BatteryPowerSource.Battery;
+        }
     }
 }

osu.iOS/osu.iOS.csproj

@@ -116,5 +116,8 @@
       <Visible>false</Visible>
     </ImageAsset>
   </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Xamarin.Essentials" Version="1.6.1" />
+  </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Xamarin\iOS\Xamarin.iOS.CSharp.targets" />
 </Project>