Merge remote-tracking branch 'upstream/master' into databased-sin-setting

.github/FUNDING.yml

@@ -0,0 +1 @@
+custom: https://osu.ppy.sh/home/support

osu.Desktop/Overlays/VersionManager.cs

@@ -1,13 +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 System;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
 using osu.Framework.Graphics.Textures;
-using osu.Framework.Platform;
 using osu.Game;
 using osu.Game.Configuration;
 using osu.Game.Graphics;
@@ -25,15 +23,13 @@ namespace osu.Desktop.Overlays
         private OsuConfigManager config;
         private OsuGameBase game;
         private NotificationOverlay notificationOverlay;
-        private GameHost host;
 
         [BackgroundDependencyLoader]
-        private void load(NotificationOverlay notification, OsuColour colours, TextureStore textures, OsuGameBase game, OsuConfigManager config, GameHost host)
+        private void load(NotificationOverlay notification, OsuColour colours, TextureStore textures, OsuGameBase game, OsuConfigManager config)
         {
             notificationOverlay = notification;
             this.config = config;
             this.game = game;
-            this.host = host;
 
             AutoSizeAxes = Axes.Both;
             Anchor = Anchor.BottomCentre;
@@ -102,27 +98,31 @@ namespace osu.Desktop.Overlays
 
                 // only show a notification if we've previously saved a version to the config file (ie. not the first run).
                 if (!string.IsNullOrEmpty(lastVersion))
-                    notificationOverlay.Post(new UpdateCompleteNotification(version, host.OpenUrlExternally));
+                    notificationOverlay.Post(new UpdateCompleteNotification(version));
             }
         }
 
         private class UpdateCompleteNotification : SimpleNotification
         {
-            public UpdateCompleteNotification(string version, Action<string> openUrl = null)
+            private readonly string version;
+
+            public UpdateCompleteNotification(string version)
             {
+                this.version = version;
                 Text = $"You are now running osu!lazer {version}.\nClick to see what's new!";
-                Icon = FontAwesome.Solid.CheckSquare;
-                Activated = delegate
-                {
-                    openUrl?.Invoke($"https://osu.ppy.sh/home/changelog/lazer/{version}");
-                    return true;
-                };
             }
 
             [BackgroundDependencyLoader]
-            private void load(OsuColour colours)
+            private void load(OsuColour colours, ChangelogOverlay changelog)
             {
+                Icon = FontAwesome.Solid.CheckSquare;
                 IconBackgound.Colour = colours.BlueDark;
+
+                Activated = delegate
+                {
+                    changelog.ShowBuild("lazer", version);
+                    return true;
+                };
             }
         }
 

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

@@ -20,14 +20,14 @@ namespace osu.Game.Rulesets.Catch.Tests
         {
         }
 
-        protected override IBeatmap CreateBeatmap(Ruleset ruleset)
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset)
         {
             var beatmap = new Beatmap
             {
                 BeatmapInfo = new BeatmapInfo
                 {
                     BaseDifficulty = new BeatmapDifficulty { CircleSize = 6, SliderMultiplier = 3 },
-                    Ruleset = ruleset.RulesetInfo
+                    Ruleset = ruleset
                 }
             };
 

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

@@ -29,14 +29,14 @@ namespace osu.Game.Rulesets.Catch.Tests
         {
         }
 
-        protected override IBeatmap CreateBeatmap(Ruleset ruleset)
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset)
         {
             var beatmap = new Beatmap
             {
                 BeatmapInfo = new BeatmapInfo
                 {
                     BaseDifficulty = new BeatmapDifficulty { CircleSize = 6 },
-                    Ruleset = ruleset.RulesetInfo
+                    Ruleset = ruleset
                 }
             };
 

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

@@ -16,14 +16,14 @@ namespace osu.Game.Rulesets.Catch.Tests
         {
         }
 
-        protected override IBeatmap CreateBeatmap(Ruleset ruleset)
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset)
         {
             var beatmap = new Beatmap
             {
                 BeatmapInfo = new BeatmapInfo
                 {
                     BaseDifficulty = new BeatmapDifficulty { CircleSize = 6 },
-                    Ruleset = ruleset.RulesetInfo
+                    Ruleset = ruleset
                 }
             };
 

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

@@ -23,13 +23,13 @@ namespace osu.Game.Rulesets.Catch.Tests
             AddAssert("First note is hyperdash", () => Beatmap.Value.Beatmap.HitObjects[0] is Fruit f && f.HyperDash);
         }
 
-        protected override IBeatmap CreateBeatmap(Ruleset ruleset)
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset)
         {
             var beatmap = new Beatmap
             {
                 BeatmapInfo =
                 {
-                    Ruleset = ruleset.RulesetInfo,
+                    Ruleset = ruleset,
                     BaseDifficulty = new BeatmapDifficulty { CircleSize = 3.6f }
                 }
             };

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

@@ -17,14 +17,14 @@ namespace osu.Game.Rulesets.Osu.Tests
         {
         }
 
-        protected override IBeatmap CreateBeatmap(Ruleset ruleset)
+        protected override IBeatmap CreateBeatmap(RulesetInfo ruleset)
         {
             var beatmap = new Beatmap
             {
                 BeatmapInfo = new BeatmapInfo
                 {
                     BaseDifficulty = new BeatmapDifficulty { CircleSize = 6 },
-                    Ruleset = ruleset.RulesetInfo
+                    Ruleset = ruleset
                 }
             };
 

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

@@ -20,7 +20,6 @@ using osu.Game.Rulesets.Replays;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Scoring;
 using osu.Game.Screens.Play;
-using osu.Game.Tests.Beatmaps;
 using osu.Game.Tests.Visual;
 using osuTK;
 
@@ -299,7 +298,7 @@ namespace osu.Game.Rulesets.Osu.Tests
         {
             AddStep("load player", () =>
             {
-                Beatmap.Value = new TestWorkingBeatmap(new Beatmap<OsuHitObject>
+                Beatmap.Value = CreateWorkingBeatmap(new Beatmap<OsuHitObject>
                 {
                     HitObjects =
                     {
@@ -323,7 +322,7 @@ namespace osu.Game.Rulesets.Osu.Tests
                         BaseDifficulty = new BeatmapDifficulty { SliderTickRate = 3 },
                         Ruleset = new OsuRuleset().RulesetInfo
                     },
-                }, Clock);
+                });
 
                 var p = new ScoreAccessibleReplayPlayer(new Score { Replay = new Replay { Frames = frames } });
 

osu.Game.Rulesets.Taiko.Tests/TestSceneTaikoPlayfield.cs

@@ -18,7 +18,6 @@ using osu.Game.Rulesets.Taiko.Judgements;
 using osu.Game.Rulesets.Taiko.Objects;
 using osu.Game.Rulesets.Taiko.Objects.Drawables;
 using osu.Game.Rulesets.Taiko.UI;
-using osu.Game.Tests.Beatmaps;
 using osu.Game.Tests.Visual;
 using osuTK;
 using osu.Game.Rulesets.Scoring;
@@ -64,7 +63,7 @@ namespace osu.Game.Rulesets.Taiko.Tests
             var controlPointInfo = new ControlPointInfo();
             controlPointInfo.TimingPoints.Add(new TimingControlPoint());
 
-            WorkingBeatmap beatmap = new TestWorkingBeatmap(new Beatmap
+            WorkingBeatmap beatmap = CreateWorkingBeatmap(new Beatmap
             {
                 HitObjects = new List<HitObject> { new CentreHit() },
                 BeatmapInfo = new BeatmapInfo
@@ -79,7 +78,7 @@ namespace osu.Game.Rulesets.Taiko.Tests
                     Ruleset = new TaikoRuleset().RulesetInfo
                 },
                 ControlPointInfo = controlPointInfo
-            }, Clock);
+            });
 
             Add(playfieldContainer = new Container
             {

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

@@ -7,6 +7,7 @@ using System.Linq;
 using System.Threading;
 using NUnit.Framework;
 using osu.Framework.Allocation;
+using osu.Framework.Audio;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Input.Events;
@@ -54,7 +55,7 @@ namespace osu.Game.Tests.Visual.Background
         private RulesetStore rulesets;
 
         [BackgroundDependencyLoader]
-        private void load(GameHost host)
+        private void load(GameHost host, AudioManager audio)
         {
             factory = new DatabaseContextFactory(LocalStorage);
             factory.ResetDatabase();
@@ -68,7 +69,7 @@ namespace osu.Game.Tests.Visual.Background
                 usage.Migrate();
 
             Dependencies.Cache(rulesets = new RulesetStore(factory));
-            Dependencies.Cache(manager = new BeatmapManager(LocalStorage, factory, rulesets, null, null, host, Beatmap.Default));
+            Dependencies.Cache(manager = new BeatmapManager(LocalStorage, factory, rulesets, null, audio, host, Beatmap.Default));
             Dependencies.Cache(new OsuConfigManager(LocalStorage));
 
             manager.Import(TestResources.GetTestBeatmapForImport());

osu.Game.Tests/Visual/Components/TestScenePreviewTrackManager.cs

@@ -111,16 +111,19 @@ namespace osu.Game.Tests.Visual.Components
 
         private class TestPreviewTrackManager : PreviewTrackManager
         {
-            protected override TrackManagerPreviewTrack CreatePreviewTrack(BeatmapSetInfo beatmapSetInfo, TrackManager trackManager) => new TestPreviewTrack(beatmapSetInfo, trackManager);
+            protected override TrackManagerPreviewTrack CreatePreviewTrack(BeatmapSetInfo beatmapSetInfo, ITrackStore trackStore) => new TestPreviewTrack(beatmapSetInfo, trackStore);
 
             protected class TestPreviewTrack : TrackManagerPreviewTrack
             {
-                public TestPreviewTrack(BeatmapSetInfo beatmapSetInfo, TrackManager trackManager)
+                private readonly ITrackStore trackManager;
+
+                public TestPreviewTrack(BeatmapSetInfo beatmapSetInfo, ITrackStore trackManager)
                     : base(beatmapSetInfo, trackManager)
                 {
+                    this.trackManager = trackManager;
                 }
 
-                protected override Track GetTrack() => new TrackVirtual { Length = 100000 };
+                protected override Track GetTrack() => trackManager.GetVirtual(100000);
             }
         }
     }

osu.Game.Tests/Visual/Editor/TestSceneEditorCompose.cs

@@ -7,7 +7,6 @@ using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Screens.Edit.Compose;
-using osu.Game.Tests.Beatmaps;
 
 namespace osu.Game.Tests.Visual.Editor
 {
@@ -19,7 +18,7 @@ namespace osu.Game.Tests.Visual.Editor
         [BackgroundDependencyLoader]
         private void load()
         {
-            Beatmap.Value = new TestWorkingBeatmap(new OsuRuleset().RulesetInfo, Clock);
+            Beatmap.Value = CreateWorkingBeatmap(new OsuRuleset().RulesetInfo);
             Child = new ComposeScreen();
         }
     }

osu.Game.Tests/Visual/Editor/TestSceneEditorComposeTimeline.cs

@@ -5,6 +5,7 @@ using System;
 using System.Collections.Generic;
 using NUnit.Framework;
 using osu.Framework.Allocation;
+using osu.Framework.Audio;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
@@ -30,9 +31,9 @@ namespace osu.Game.Tests.Visual.Editor
         };
 
         [BackgroundDependencyLoader]
-        private void load()
+        private void load(AudioManager audio)
         {
-            Beatmap.Value = new WaveformTestBeatmap();
+            Beatmap.Value = new WaveformTestBeatmap(audio);
 
             Children = new Drawable[]
             {

osu.Game.Tests/Visual/Editor/TestSceneEditorSeekSnapping.cs

@@ -1,4 +1,4 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// 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;
@@ -10,7 +10,6 @@ using osu.Framework.Graphics.Shapes;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Rulesets.Osu.Objects;
-using osu.Game.Tests.Beatmaps;
 using osuTK;
 using osuTK.Graphics;
 
@@ -48,7 +47,7 @@ namespace osu.Game.Tests.Visual.Editor
                 }
             };
 
-            Beatmap.Value = new TestWorkingBeatmap(testBeatmap, Clock);
+            Beatmap.Value = CreateWorkingBeatmap(testBeatmap);
 
             Child = new TimingPointVisualiser(testBeatmap, 5000) { Clock = Clock };
         }

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

@@ -8,7 +8,6 @@ using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Screens.Edit.Components.Timelines.Summary;
-using osu.Game.Tests.Beatmaps;
 using osuTK;
 
 namespace osu.Game.Tests.Visual.Editor
@@ -21,7 +20,7 @@ namespace osu.Game.Tests.Visual.Editor
         [BackgroundDependencyLoader]
         private void load()
         {
-            Beatmap.Value = new TestWorkingBeatmap(new OsuRuleset().RulesetInfo, null);
+            Beatmap.Value = CreateWorkingBeatmap(new OsuRuleset().RulesetInfo);
 
             Add(new SummaryTimeline
             {

osu.Game.Tests/Visual/Editor/TestSceneHitObjectComposer.cs

@@ -18,7 +18,6 @@ using osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles.Components;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Screens.Edit.Compose;
 using osu.Game.Screens.Edit.Compose.Components;
-using osu.Game.Tests.Beatmaps;
 using osuTK;
 
 namespace osu.Game.Tests.Visual.Editor
@@ -45,7 +44,7 @@ namespace osu.Game.Tests.Visual.Editor
         [BackgroundDependencyLoader]
         private void load()
         {
-            Beatmap.Value = new TestWorkingBeatmap(new Beatmap
+            Beatmap.Value = CreateWorkingBeatmap(new Beatmap
             {
                 HitObjects = new List<HitObject>
                 {

osu.Game.Tests/Visual/Editor/TestScenePlaybackControl.cs

@@ -1,4 +1,4 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// 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;
@@ -7,7 +7,6 @@ using osu.Framework.Graphics;
 using osu.Framework.Timing;
 using osu.Game.Beatmaps;
 using osu.Game.Screens.Edit.Components;
-using osu.Game.Tests.Beatmaps;
 using osuTK;
 
 namespace osu.Game.Tests.Visual.Editor
@@ -29,7 +28,7 @@ namespace osu.Game.Tests.Visual.Editor
                 Size = new Vector2(200, 100)
             };
 
-            Beatmap.Value = new TestWorkingBeatmap(new Beatmap(), Clock);
+            Beatmap.Value = CreateWorkingBeatmap(new Beatmap());
 
             Child = playback;
         }

osu.Game.Tests/Visual/Editor/TestSceneWaveform.cs

@@ -3,6 +3,7 @@
 
 using NUnit.Framework;
 using osu.Framework.Allocation;
+using osu.Framework.Audio;
 using osu.Framework.Audio.Track;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Audio;
@@ -10,6 +11,7 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
 using osu.Game.Beatmaps;
 using osu.Game.Graphics.Sprites;
+using osu.Game.Rulesets.Osu;
 using osuTK.Graphics;
 
 namespace osu.Game.Tests.Visual.Editor
@@ -20,9 +22,9 @@ namespace osu.Game.Tests.Visual.Editor
         private WorkingBeatmap waveformBeatmap;
 
         [BackgroundDependencyLoader]
-        private void load()
+        private void load(AudioManager audio)
         {
-            waveformBeatmap = new WaveformTestBeatmap();
+            waveformBeatmap = new WaveformTestBeatmap(audio);
         }
 
         [TestCase(1f)]
@@ -91,7 +93,7 @@ namespace osu.Game.Tests.Visual.Editor
                     Child = graph = new TestWaveformGraph
                     {
                         RelativeSizeAxes = Axes.Both,
-                        Waveform = new DummyWorkingBeatmap().Waveform,
+                        Waveform = CreateWorkingBeatmap(new OsuRuleset().RulesetInfo).Waveform,
                     },
                 };
             });

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

@@ -1,4 +1,4 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// 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;
@@ -16,7 +16,6 @@ using osu.Game.Rulesets.Scoring;
 using osu.Game.Scoring;
 using osu.Game.Screens;
 using osu.Game.Screens.Play;
-using osu.Game.Tests.Beatmaps;
 
 namespace osu.Game.Tests.Visual.Gameplay
 {
@@ -29,7 +28,7 @@ namespace osu.Game.Tests.Visual.Gameplay
         public void Setup() => Schedule(() =>
         {
             InputManager.Child = stack = new OsuScreenStack { RelativeSizeAxes = Axes.Both };
-            Beatmap.Value = new TestWorkingBeatmap(new TestBeatmap(new OsuRuleset().RulesetInfo), Clock);
+            Beatmap.Value = CreateWorkingBeatmap(new OsuRuleset().RulesetInfo);
         });
 
         [Test]

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

@@ -3,7 +3,6 @@
 
 using System;
 using osu.Framework.Lists;
-using osu.Framework.Timing;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets;
 using osu.Game.Screens.Play;
@@ -43,9 +42,9 @@ namespace osu.Game.Tests.Visual.Gameplay
             });
         }
 
-        protected override WorkingBeatmap CreateWorkingBeatmap(IBeatmap beatmap, IFrameBasedClock clock)
+        protected override WorkingBeatmap CreateWorkingBeatmap(IBeatmap beatmap)
         {
-            var working = base.CreateWorkingBeatmap(beatmap, clock);
+            var working = base.CreateWorkingBeatmap(beatmap);
             workingWeakReferences.Add(working);
             return working;
         }

osu.Game.Tests/Visual/Multiplayer/TestSceneMatchSettingsOverlay.cs

@@ -8,7 +8,6 @@ using osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
-using osu.Game.Beatmaps;
 using osu.Game.Graphics.Sprites;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Online.Multiplayer;
@@ -57,7 +56,7 @@ namespace osu.Game.Tests.Visual.Multiplayer
             AddStep("set name", () => Room.Name.Value = "Room name");
             AddAssert("button disabled", () => !settings.ApplyButton.Enabled.Value);
 
-            AddStep("set beatmap", () => Room.Playlist.Add(new PlaylistItem { Beatmap = new DummyWorkingBeatmap().BeatmapInfo }));
+            AddStep("set beatmap", () => Room.Playlist.Add(new PlaylistItem { Beatmap = CreateBeatmap(Ruleset.Value).BeatmapInfo }));
             AddAssert("button enabled", () => settings.ApplyButton.Enabled.Value);
 
             AddStep("clear name", () => Room.Name.Value = "");

osu.Game.Tests/Visual/Online/TestSceneChangelogOverlay.cs

@@ -0,0 +1,70 @@
+// 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.Collections.Generic;
+using NUnit.Framework;
+using osu.Game.Online.API.Requests.Responses;
+using osu.Game.Overlays;
+using osu.Game.Overlays.Changelog;
+
+namespace osu.Game.Tests.Visual.Online
+{
+    [TestFixture]
+    public class TestSceneChangelogOverlay : OsuTestScene
+    {
+        private ChangelogOverlay changelog;
+
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(UpdateStreamBadgeArea),
+            typeof(UpdateStreamBadge),
+            typeof(ChangelogHeader),
+            typeof(ChangelogContent),
+            typeof(ChangelogListing),
+            typeof(ChangelogSingleBuild),
+            typeof(ChangelogBuild),
+        };
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            Add(changelog = new ChangelogOverlay());
+            AddStep(@"Show", changelog.Show);
+            AddStep(@"Hide", changelog.Hide);
+
+            AddWaitStep("wait for hide", 3);
+
+            AddStep(@"Show with Lazer 2018.712.0", () =>
+            {
+                changelog.ShowBuild(new APIChangelogBuild
+                {
+                    Version = "2018.712.0",
+                    DisplayVersion = "2018.712.0",
+                    UpdateStream = new APIUpdateStream { Name = "lazer" },
+                    ChangelogEntries = new List<APIChangelogEntry>
+                    {
+                        new APIChangelogEntry
+                        {
+                            Category = "Test",
+                            Title = "Title",
+                            MessageHtml = "Message",
+                        }
+                    }
+                });
+                changelog.Show();
+            });
+
+            AddWaitStep("wait for show", 3);
+            AddStep(@"Hide", changelog.Hide);
+            AddWaitStep("wait for hide", 3);
+
+            AddStep(@"Show with listing", () =>
+            {
+                changelog.ShowListing();
+                changelog.Show();
+            });
+        }
+    }
+}

osu.Game.Tests/Visual/Online/TestSceneDirectPanel.cs

@@ -8,7 +8,6 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Overlays.Direct;
 using osu.Game.Rulesets.Osu;
-using osu.Game.Tests.Beatmaps;
 using osuTK;
 
 namespace osu.Game.Tests.Visual.Online
@@ -25,7 +24,7 @@ namespace osu.Game.Tests.Visual.Online
         [BackgroundDependencyLoader]
         private void load()
         {
-            var beatmap = new TestWorkingBeatmap(new OsuRuleset().RulesetInfo, null);
+            var beatmap = CreateWorkingBeatmap(new OsuRuleset().RulesetInfo);
             beatmap.BeatmapSetInfo.OnlineInfo.HasVideo = true;
             beatmap.BeatmapSetInfo.OnlineInfo.HasStoryboard = true;
 

osu.Game.Tests/Visual/Online/TestSceneShowMoreButton.cs

@@ -0,0 +1,55 @@
+// 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.Overlays.Profile.Sections;
+using System;
+using System.Collections.Generic;
+using osu.Framework.Graphics;
+
+namespace osu.Game.Tests.Visual.Online
+{
+    public class TestSceneShowMoreButton : OsuTestScene
+    {
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(ShowMoreButton),
+        };
+
+        public TestSceneShowMoreButton()
+        {
+            ShowMoreButton button = null;
+
+            int fireCount = 0;
+
+            Add(button = new ShowMoreButton
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                Action = () =>
+                {
+                    fireCount++;
+                    // ReSharper disable once AccessToModifiedClosure
+                    // ReSharper disable once PossibleNullReferenceException
+                    Scheduler.AddDelayed(() => button.IsLoading = false, 2000);
+                }
+            });
+
+            AddStep("click button", () => button.Click());
+
+            AddAssert("action fired once", () => fireCount == 1);
+            AddAssert("is in loading state", () => button.IsLoading);
+
+            AddStep("click button", () => button.Click());
+
+            AddAssert("action not fired", () => fireCount == 1);
+            AddAssert("is in loading state", () => button.IsLoading);
+
+            AddUntilStep("wait for loaded", () => !button.IsLoading);
+
+            AddStep("click button", () => button.Click());
+
+            AddAssert("action fired twice", () => fireCount == 2);
+            AddAssert("is in loading state", () => button.IsLoading);
+        }
+    }
+}

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

@@ -5,6 +5,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using NUnit.Framework;
+using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Game.Beatmaps;
 using osu.Game.Screens.Select;
@@ -18,7 +19,8 @@ namespace osu.Game.Tests.Visual.SongSelect
     {
         public override IReadOnlyList<Type> RequiredTypes => new[] { typeof(BeatmapDetails) };
 
-        public TestSceneBeatmapDetailArea()
+        [BackgroundDependencyLoader]
+        private void load(OsuGameBase game)
         {
             BeatmapDetailArea detailsArea;
             Add(detailsArea = new BeatmapDetailArea
@@ -28,7 +30,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                 Size = new Vector2(550f, 450f),
             });
 
-            AddStep("all metrics", () => detailsArea.Beatmap = new DummyWorkingBeatmap
+            AddStep("all metrics", () => detailsArea.Beatmap = new DummyWorkingBeatmap(null, null)
                 {
                     BeatmapInfo =
                     {
@@ -56,7 +58,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                 }
             );
 
-            AddStep("all except source", () => detailsArea.Beatmap = new DummyWorkingBeatmap
+            AddStep("all except source", () => detailsArea.Beatmap = new DummyWorkingBeatmap(null, null)
             {
                 BeatmapInfo =
                 {
@@ -82,7 +84,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                 }
             });
 
-            AddStep("ratings", () => detailsArea.Beatmap = new DummyWorkingBeatmap
+            AddStep("ratings", () => detailsArea.Beatmap = new DummyWorkingBeatmap(null, null)
             {
                 BeatmapInfo =
                 {
@@ -107,7 +109,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                 }
             });
 
-            AddStep("fails+retries", () => detailsArea.Beatmap = new DummyWorkingBeatmap
+            AddStep("fails+retries", () => detailsArea.Beatmap = new DummyWorkingBeatmap(null, null)
             {
                 BeatmapInfo =
                 {
@@ -133,7 +135,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                 }
             });
 
-            AddStep("null metrics", () => detailsArea.Beatmap = new DummyWorkingBeatmap
+            AddStep("null metrics", () => detailsArea.Beatmap = new DummyWorkingBeatmap(null, null)
             {
                 BeatmapInfo =
                 {

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

@@ -1,4 +1,4 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// 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;
@@ -18,7 +18,6 @@ using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Taiko;
 using osu.Game.Screens.Select;
-using osu.Game.Tests.Beatmaps;
 using osuTK;
 
 namespace osu.Game.Tests.Visual.SongSelect
@@ -136,7 +135,7 @@ namespace osu.Game.Tests.Visual.SongSelect
             AddStep($"select {b?.Metadata.Title ?? "null"} beatmap", () =>
             {
                 infoBefore = infoWedge.Info;
-                infoWedge.Beatmap = Beatmap.Value = b == null ? Beatmap.Default : new TestWorkingBeatmap(b);
+                infoWedge.Beatmap = Beatmap.Value = b == null ? Beatmap.Default : CreateWorkingBeatmap(b);
             });
 
             AddUntilStep("wait for async load", () => infoWedge.Info != infoBefore);

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

@@ -8,6 +8,7 @@ using System.Linq;
 using System.Text;
 using NUnit.Framework;
 using osu.Framework.Allocation;
+using osu.Framework.Audio;
 using osu.Framework.Bindables;
 using osu.Framework.Extensions;
 using osu.Framework.MathUtils;
@@ -79,7 +80,7 @@ namespace osu.Game.Tests.Visual.SongSelect
         }
 
         [BackgroundDependencyLoader]
-        private void load(GameHost host)
+        private void load(GameHost host, AudioManager audio)
         {
             factory = new DatabaseContextFactory(LocalStorage);
             factory.ResetDatabase();
@@ -93,7 +94,7 @@ namespace osu.Game.Tests.Visual.SongSelect
                 usage.Migrate();
 
             Dependencies.Cache(rulesets = new RulesetStore(factory));
-            Dependencies.Cache(manager = new BeatmapManager(LocalStorage, factory, rulesets, null, null, host, defaultBeatmap = Beatmap.Default));
+            Dependencies.Cache(manager = new BeatmapManager(LocalStorage, factory, rulesets, null, audio, host, defaultBeatmap = Beatmap.Default));
 
             Beatmap.SetDefault();
         }

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

@@ -41,7 +41,7 @@ namespace osu.Game.Tests.Visual.UserInterface
             TestUpdateableBeatmapBackgroundSprite background = null;
 
             AddStep("load null beatmap", () => Child = background = new TestUpdateableBeatmapBackgroundSprite { RelativeSizeAxes = Axes.Both });
-            AddUntilStep("wait for load", () => background.ContentLoaded);
+            AddUntilStep("content loaded", () => background.ContentLoaded);
         }
 
         [Test]

osu.Game.Tests/WaveformTestBeatmap.cs

@@ -3,6 +3,7 @@
 
 using System.IO;
 using System.Linq;
+using osu.Framework.Audio;
 using osu.Framework.Audio.Track;
 using osu.Framework.Graphics.Textures;
 using osu.Game.Beatmaps;
@@ -19,12 +20,14 @@ namespace osu.Game.Tests
     {
         private readonly ZipArchiveReader reader;
         private readonly Stream stream;
+        private readonly ITrackStore trackStore;
 
-        public WaveformTestBeatmap()
+        public WaveformTestBeatmap(AudioManager audioManager)
-            : base(new BeatmapInfo())
+            : base(new BeatmapInfo(), audioManager)
         {
             stream = TestResources.GetTestBeatmapStream();
             reader = new ZipArchiveReader(stream);
+            trackStore = audioManager.GetTrackStore(reader);
         }
 
         public override void Dispose()
@@ -32,17 +35,19 @@ namespace osu.Game.Tests
             base.Dispose();
             stream?.Dispose();
             reader?.Dispose();
+            trackStore?.Dispose();
         }
 
         protected override IBeatmap GetBeatmap() => createTestBeatmap();
 
         protected override Texture GetBackground() => null;
 
-        protected override Waveform GetWaveform() => new Waveform(getAudioStream());
+        protected override Waveform GetWaveform() => new Waveform(trackStore.GetStream(firstAudioFile));
 
-        protected override Track GetTrack() => new TrackBass(getAudioStream());
+        protected override Track GetTrack() => trackStore.Get(firstAudioFile);
+
+        private string firstAudioFile => reader.Filenames.First(f => f.EndsWith(".mp3"));
 
-        private Stream getAudioStream() => reader.GetStream(reader.Filenames.First(f => f.EndsWith(".mp3")));
         private Stream getBeatmapStream() => reader.GetStream(reader.Filenames.First(f => f.EndsWith(".osu")));
 
         private Beatmap createTestBeatmap()

osu.Game/Audio/PreviewTrackManager.cs

@@ -20,19 +20,18 @@ namespace osu.Game.Audio
         private readonly BindableDouble muteBindable = new BindableDouble();
 
         private AudioManager audio;
-        private TrackManager trackManager;
+        private ITrackStore trackStore;
 
         private TrackManagerPreviewTrack current;
 
         [BackgroundDependencyLoader]
         private void load(AudioManager audio, FrameworkConfigManager config)
         {
-            trackManager = new TrackManager(new OnlineStore());
+            trackStore = audio.GetTrackStore(new OnlineStore());
 
             this.audio = audio;
-            audio.AddItem(trackManager);
 
-            config.BindWith(FrameworkSetting.VolumeMusic, trackManager.Volume);
+            config.BindWith(FrameworkSetting.VolumeMusic, trackStore.Volume);
         }
 
         /// <summary>
@@ -42,19 +41,19 @@ namespace osu.Game.Audio
         /// <returns>The playable <see cref="PreviewTrack"/>.</returns>
         public PreviewTrack Get(BeatmapSetInfo beatmapSetInfo)
         {
-            var track = CreatePreviewTrack(beatmapSetInfo, trackManager);
+            var track = CreatePreviewTrack(beatmapSetInfo, trackStore);
 
             track.Started += () =>
             {
                 current?.Stop();
                 current = track;
-                audio.Track.AddAdjustment(AdjustableProperty.Volume, muteBindable);
+                audio.Tracks.AddAdjustment(AdjustableProperty.Volume, muteBindable);
             };
 
             track.Stopped += () =>
             {
                 current = null;
-                audio.Track.RemoveAdjustment(AdjustableProperty.Volume, muteBindable);
+                audio.Tracks.RemoveAdjustment(AdjustableProperty.Volume, muteBindable);
             };
 
             return track;
@@ -81,16 +80,16 @@ namespace osu.Game.Audio
         /// <summary>
         /// Creates the <see cref="TrackManagerPreviewTrack"/>.
         /// </summary>
-        protected virtual TrackManagerPreviewTrack CreatePreviewTrack(BeatmapSetInfo beatmapSetInfo, TrackManager trackManager) => new TrackManagerPreviewTrack(beatmapSetInfo, trackManager);
+        protected virtual TrackManagerPreviewTrack CreatePreviewTrack(BeatmapSetInfo beatmapSetInfo, ITrackStore trackStore) => new TrackManagerPreviewTrack(beatmapSetInfo, trackStore);
 
         protected class TrackManagerPreviewTrack : PreviewTrack
         {
             public IPreviewTrackOwner Owner { get; private set; }
 
             private readonly BeatmapSetInfo beatmapSetInfo;
-            private readonly TrackManager trackManager;
+            private readonly ITrackStore trackManager;
 
-            public TrackManagerPreviewTrack(BeatmapSetInfo beatmapSetInfo, TrackManager trackManager)
+            public TrackManagerPreviewTrack(BeatmapSetInfo beatmapSetInfo, ITrackStore trackManager)
             {
                 this.beatmapSetInfo = beatmapSetInfo;
                 this.trackManager = trackManager;

osu.Game/Beatmaps/BeatmapManager.cs

@@ -429,7 +429,7 @@ namespace osu.Game.Beatmaps
             private readonly IBeatmap beatmap;
 
             public DummyConversionBeatmap(IBeatmap beatmap)
-                : base(beatmap.BeatmapInfo)
+                : base(beatmap.BeatmapInfo, null)
             {
                 this.beatmap = beatmap;
             }

osu.Game/Beatmaps/BeatmapManager_WorkingBeatmap.cs

@@ -20,14 +20,12 @@ namespace osu.Game.Beatmaps
         protected class BeatmapManagerWorkingBeatmap : WorkingBeatmap
         {
             private readonly IResourceStore<byte[]> store;
-            private readonly AudioManager audioManager;
 
             public BeatmapManagerWorkingBeatmap(IResourceStore<byte[]> store, TextureStore textureStore, BeatmapInfo beatmapInfo, AudioManager audioManager)
-                : base(beatmapInfo)
+                : base(beatmapInfo, audioManager)
             {
                 this.store = store;
                 this.textureStore = textureStore;
-                this.audioManager = audioManager;
             }
 
             protected override IBeatmap GetBeatmap()
@@ -47,6 +45,8 @@ namespace osu.Game.Beatmaps
 
             private TextureStore textureStore;
 
+            private ITrackStore trackStore;
+
             protected override bool BackgroundStillValid(Texture b) => false; // bypass lazy logic. we want to return a new background each time for refcounting purposes.
 
             protected override Texture GetBackground()
@@ -68,8 +68,7 @@ namespace osu.Game.Beatmaps
             {
                 try
                 {
-                    var trackData = store.GetStream(getPathForFile(Metadata.AudioFile));
+                    return (trackStore ?? (trackStore = AudioManager.GetTrackStore(store))).Get(getPathForFile(Metadata.AudioFile));
-                    return trackData == null ? null : new TrackBass(trackData);
                 }
                 catch
                 {
@@ -77,6 +76,14 @@ namespace osu.Game.Beatmaps
                 }
             }
 
+            public override void RecycleTrack()
+            {
+                base.RecycleTrack();
+
+                trackStore?.Dispose();
+                trackStore = null;
+            }
+
             public override void TransferTo(WorkingBeatmap other)
             {
                 base.TransferTo(other);
@@ -135,7 +142,7 @@ namespace osu.Game.Beatmaps
 
                 try
                 {
-                    skin = new LegacyBeatmapSkin(BeatmapInfo, store, audioManager);
+                    skin = new LegacyBeatmapSkin(BeatmapInfo, store, AudioManager);
                 }
                 catch (Exception e)
                 {

osu.Game/Beatmaps/BindableBeatmap.cs

@@ -1,11 +1,7 @@
 // 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.Diagnostics;
-using JetBrains.Annotations;
-using osu.Framework.Audio;
-using osu.Framework.Audio.Track;
 using osu.Framework.Bindables;
 
 namespace osu.Game.Beatmaps
@@ -16,32 +12,15 @@ namespace osu.Game.Beatmaps
     /// </summary>
     public abstract class BindableBeatmap : NonNullableBindable<WorkingBeatmap>
     {
-        private AudioManager audioManager;
         private WorkingBeatmap lastBeatmap;
 
         protected BindableBeatmap(WorkingBeatmap defaultValue)
             : base(defaultValue)
         {
+            BindValueChanged(b => updateAudioTrack(b.NewValue), true);
         }
 
-        /// <summary>
+        private void updateAudioTrack(WorkingBeatmap beatmap)
-        /// Registers an <see cref="AudioManager"/> for <see cref="Track"/>s to be added to.
-        /// </summary>
-        /// <param name="audioManager">The <see cref="AudioManager"/> to register.</param>
-        protected void RegisterAudioManager([NotNull] AudioManager audioManager)
-        {
-            if (this.audioManager != null) throw new InvalidOperationException($"Cannot register multiple {nameof(AudioManager)}s.");
-
-            this.audioManager = audioManager;
-
-            ValueChanged += b => registerAudioTrack(b.NewValue);
-
-            // If the track has changed prior to this being called, let's register it
-            if (Value != Default)
-                registerAudioTrack(Value);
-        }
-
-        private void registerAudioTrack(WorkingBeatmap beatmap)
         {
             var trackLoaded = lastBeatmap?.TrackLoaded ?? false;
 
@@ -55,18 +34,9 @@ namespace osu.Game.Beatmaps
 
                     lastBeatmap.RecycleTrack();
                 }
-
-                audioManager.Track.AddItem(beatmap.Track);
             }
 
             lastBeatmap = beatmap;
         }
-
-        /// <summary>
-        /// Retrieve a new <see cref="BindableBeatmap"/> instance weakly bound to this <see cref="BindableBeatmap"/>.
-        /// If you are further binding to events of the retrieved <see cref="BindableBeatmap"/>, ensure a local reference is held.
-        /// </summary>
-        [NotNull]
-        public new abstract BindableBeatmap GetBoundCopy();
     }
 }

osu.Game/Beatmaps/Drawables/UpdateableBeatmapBackgroundSprite.cs

@@ -1,6 +1,7 @@
 // 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 osu.Framework.Allocation;
 using osu.Framework.Bindables;
 using osu.Framework.Graphics;
@@ -31,24 +32,8 @@ namespace osu.Game.Beatmaps.Drawables
         /// </summary>
         protected virtual double UnloadDelay => 10000;
 
-        private BeatmapInfo lastModel;
+        protected override DelayedLoadWrapper CreateDelayedLoadWrapper(Func<Drawable> createContentFunc, double timeBeforeLoad)
-        private bool firstLoad = true;
+            => new DelayedLoadUnloadWrapper(createContentFunc, timeBeforeLoad, UnloadDelay);
-
-        protected override DelayedLoadWrapper CreateDelayedLoadWrapper(Drawable content, double timeBeforeLoad)
-        {
-            return new DelayedLoadUnloadWrapper(() =>
-            {
-                // If DelayedLoadUnloadWrapper is attempting to RELOAD the same content (Beatmap), that means that it was
-                // previously UNLOADED and thus its children have been disposed of, so we need to recreate them here.
-                if (!firstLoad && lastModel == Beatmap.Value)
-                    return CreateDrawable(Beatmap.Value);
-
-                // If the model has changed since the previous unload (or if there was no load), then we can safely use the given content
-                lastModel = Beatmap.Value;
-                firstLoad = false;
-                return content;
-            }, timeBeforeLoad, UnloadDelay);
-        }
 
         protected override Drawable CreateDrawable(BeatmapInfo model)
         {

osu.Game/Beatmaps/DummyWorkingBeatmap.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Collections.Generic;
+using osu.Framework.Audio;
 using osu.Framework.Audio.Track;
 using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Graphics.Textures;
@@ -16,9 +17,9 @@ namespace osu.Game.Beatmaps
 {
     public class DummyWorkingBeatmap : WorkingBeatmap
     {
-        private readonly OsuGameBase game;
+        private readonly TextureStore textures;
 
-        public DummyWorkingBeatmap(OsuGameBase game = null)
+        public DummyWorkingBeatmap(AudioManager audio, TextureStore textures)
             : base(new BeatmapInfo
             {
                 Metadata = new BeatmapMetadata
@@ -34,16 +35,16 @@ namespace osu.Game.Beatmaps
                     OverallDifficulty = 0,
                 },
                 Ruleset = new DummyRulesetInfo()
-            })
+            }, audio)
         {
-            this.game = game;
+            this.textures = textures;
         }
 
         protected override IBeatmap GetBeatmap() => new Beatmap();
 
-        protected override Texture GetBackground() => game?.Textures.Get(@"Backgrounds/bg4");
+        protected override Texture GetBackground() => textures?.Get(@"Backgrounds/bg4");
 
-        protected override Track GetTrack() => new TrackVirtual { Length = 1000 };
+        protected override Track GetTrack() => GetVirtualTrack();
 
         private class DummyRulesetInfo : RulesetInfo
         {

osu.Game/Beatmaps/WorkingBeatmap.cs

@@ -11,15 +11,17 @@ using osu.Framework.IO.File;
 using System.IO;
 using System.Linq;
 using System.Threading;
+using osu.Framework.Audio;
 using osu.Game.IO.Serialization;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.UI;
 using osu.Game.Skinning;
 
 namespace osu.Game.Beatmaps
 {
-    public abstract partial class WorkingBeatmap : IDisposable
+    public abstract class WorkingBeatmap : IDisposable
     {
         public readonly BeatmapInfo BeatmapInfo;
 
@@ -27,8 +29,11 @@ namespace osu.Game.Beatmaps
 
         public readonly BeatmapMetadata Metadata;
 
-        protected WorkingBeatmap(BeatmapInfo beatmapInfo)
+        protected AudioManager AudioManager { get; }
+
+        protected WorkingBeatmap(BeatmapInfo beatmapInfo, AudioManager audioManager)
         {
+            AudioManager = audioManager;
             BeatmapInfo = beatmapInfo;
             BeatmapSetInfo = beatmapInfo.BeatmapSet;
             Metadata = beatmapInfo.Metadata ?? BeatmapSetInfo?.Metadata ?? new BeatmapMetadata();
@@ -46,13 +51,39 @@ namespace osu.Game.Beatmaps
                 return b;
             });
 
-            track = new RecyclableLazy<Track>(() => GetTrack() ?? new VirtualBeatmapTrack(Beatmap));
+            track = new RecyclableLazy<Track>(() => GetTrack() ?? GetVirtualTrack());
             background = new RecyclableLazy<Texture>(GetBackground, BackgroundStillValid);
             waveform = new RecyclableLazy<Waveform>(GetWaveform);
             storyboard = new RecyclableLazy<Storyboard>(GetStoryboard);
             skin = new RecyclableLazy<Skin>(GetSkin);
         }
 
+        protected virtual Track GetVirtualTrack()
+        {
+            const double excess_length = 1000;
+
+            var lastObject = Beatmap.HitObjects.LastOrDefault();
+
+            double length;
+
+            switch (lastObject)
+            {
+                case null:
+                    length = excess_length;
+                    break;
+
+                case IHasEndTime endTime:
+                    length = endTime.EndTime + excess_length;
+                    break;
+
+                default:
+                    length = lastObject.StartTime + excess_length;
+                    break;
+            }
+
+            return AudioManager.Tracks.GetVirtual(length);
+        }
+
         /// <summary>
         /// Saves the <see cref="Beatmaps.Beatmap"/>.
         /// </summary>
@@ -150,6 +181,7 @@ namespace osu.Game.Beatmaps
 
         public bool SkinLoaded => skin.IsResultAvailable;
         public Skin Skin => skin.Value;
+
         protected virtual Skin GetSkin() => new DefaultSkin();
         private readonly RecyclableLazy<Skin> skin;
 
@@ -175,7 +207,7 @@ namespace osu.Game.Beatmaps
         /// Eagerly dispose of the audio track associated with this <see cref="WorkingBeatmap"/> (if any).
         /// Accessing track again will load a fresh instance.
         /// </summary>
-        public void RecycleTrack() => track.Recycle();
+        public virtual void RecycleTrack() => track.Recycle();
 
         public class RecyclableLazy<T>
         {

osu.Game/Beatmaps/WorkingBeatmap_VirtualBeatmapTrack.cs

@@ -1,41 +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.Linq;
-using osu.Framework.Audio.Track;
-using osu.Game.Rulesets.Objects;
-using osu.Game.Rulesets.Objects.Types;
-
-namespace osu.Game.Beatmaps
-{
-    public partial class WorkingBeatmap
-    {
-        /// <summary>
-        /// A type of <see cref="TrackVirtual"/> which provides a valid length based on the <see cref="HitObject"/>s of an <see cref="IBeatmap"/>.
-        /// </summary>
-        protected class VirtualBeatmapTrack : TrackVirtual
-        {
-            private const double excess_length = 1000;
-
-            public VirtualBeatmapTrack(IBeatmap beatmap)
-            {
-                var lastObject = beatmap.HitObjects.LastOrDefault();
-
-                switch (lastObject)
-                {
-                    case null:
-                        Length = excess_length;
-                        break;
-
-                    case IHasEndTime endTime:
-                        Length = endTime.EndTime + excess_length;
-                        break;
-
-                    default:
-                        Length = lastObject.StartTime + excess_length;
-                        break;
-                }
-            }
-        }
-    }
-}

osu.Game/Configuration/DatabasedConfigManager.cs

@@ -2,6 +2,7 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Collections.Generic;
+using System.Linq;
 using osu.Framework.Bindables;
 using osu.Framework.Configuration;
 using osu.Game.Rulesets;
@@ -19,6 +20,8 @@ namespace osu.Game.Configuration
 
         private readonly RulesetInfo ruleset;
 
+        private readonly bool legacySettingsExist;
+
         protected DatabasedConfigManager(SettingsStore settings, RulesetInfo ruleset = null, int? variant = null)
         {
             this.settings = settings;
@@ -26,6 +29,7 @@ namespace osu.Game.Configuration
             this.variant = variant;
 
             databasedSettings = settings.Query(ruleset?.ID, variant);
+            legacySettingsExist = databasedSettings.Any(s => int.TryParse(s.Key, out var _));
 
             InitialiseDefaults();
         }
@@ -43,7 +47,18 @@ namespace osu.Game.Configuration
         {
             base.AddBindable(lookup, bindable);
 
-            var setting = databasedSettings.Find(s => (int)s.Key == (int)(object)lookup);
+            if (legacySettingsExist)
+            {
+                var legacySetting = databasedSettings.Find(s => s.Key == ((int)(object)lookup).ToString());
+
+                if (legacySetting != null)
+                {
+                    bindable.Parse(legacySetting.Value);
+                    settings.Delete(legacySetting);
+                }
+            }
+
+            var setting = databasedSettings.Find(s => s.Key == lookup.ToString());
 
             if (setting != null)
             {
@@ -53,7 +68,7 @@ namespace osu.Game.Configuration
             {
                 settings.Update(setting = new DatabasedSetting
                 {
-                    Key = lookup,
+                    Key = lookup.ToString(),
                     Value = bindable.Value,
                     RulesetID = ruleset?.ID,
                     Variant = variant,

osu.Game/Configuration/DatabasedSetting.cs

@@ -1,4 +1,4 @@
-// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// 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.ComponentModel.DataAnnotations.Schema;
@@ -18,11 +18,7 @@ namespace osu.Game.Configuration
         public int? SkinInfoID { get; set; }
 
         [Column("Key")]
-        public int IntKey
+        public string Key { get; set; }
-        {
-            get => (int)Key;
-            private set => Key = value;
-        }
 
         [Column("Value")]
         public string StringValue
@@ -31,10 +27,9 @@ namespace osu.Game.Configuration
             set => Value = value;
         }
 
-        public object Key;
         public object Value;
 
-        public DatabasedSetting(object key, object value)
+        public DatabasedSetting(string key, object value)
         {
             Key = key;
             Value = value;

osu.Game/Configuration/SettingsStore.cs

@@ -37,5 +37,11 @@ namespace osu.Game.Configuration
 
             SettingChanged?.Invoke();
         }
+
+        public void Delete(DatabasedSetting setting)
+        {
+            using (var usage = ContextFactory.GetForWrite())
+                usage.Context.Remove(setting);
+        }
     }
 }

osu.Game/Graphics/Containers/OsuFocusedOverlayContainer.cs

@@ -51,8 +51,8 @@ namespace osu.Game.Graphics.Containers
             if (osuGame != null)
                 OverlayActivationMode.BindTo(osuGame.OverlayActivationMode);
 
-            samplePopIn = audio.Sample.Get(@"UI/overlay-pop-in");
+            samplePopIn = audio.Samples.Get(@"UI/overlay-pop-in");
-            samplePopOut = audio.Sample.Get(@"UI/overlay-pop-out");
+            samplePopOut = audio.Samples.Get(@"UI/overlay-pop-out");
 
             StateChanged += onStateChanged;
         }

osu.Game/Graphics/Containers/OsuHoverContainer.cs

@@ -24,7 +24,8 @@ namespace osu.Game.Graphics.Containers
         {
             Enabled.ValueChanged += e =>
             {
-                if (!e.NewValue) unhover();
+                if (!e.NewValue)
+                    unhover();
             };
         }
 
@@ -49,7 +50,8 @@ namespace osu.Game.Graphics.Containers
 
         private void unhover()
         {
-            if (!isHovered) return;
+            if (!isHovered)
+                return;
 
             isHovered = false;
             EffectTargets.ForEach(d => d.FadeColour(IdleColour, FADE_DURATION, Easing.OutQuint));

osu.Game/Graphics/OsuColour.cs

@@ -40,8 +40,10 @@ namespace osu.Game.Graphics
         // See https://github.com/ppy/osu-web/blob/master/resources/assets/less/colors.less
         public readonly Color4 PurpleLighter = FromHex(@"eeeeff");
         public readonly Color4 PurpleLight = FromHex(@"aa88ff");
+        public readonly Color4 PurpleLightAlternative = FromHex(@"cba4da");
         public readonly Color4 Purple = FromHex(@"8866ee");
         public readonly Color4 PurpleDark = FromHex(@"6644cc");
+        public readonly Color4 PurpleDarkAlternative = FromHex(@"312436");
         public readonly Color4 PurpleDarker = FromHex(@"441188");
 
         public readonly Color4 PinkLighter = FromHex(@"ffddee");

osu.Game/Graphics/ScreenshotManager.cs

@@ -51,7 +51,7 @@ namespace osu.Game.Graphics
             screenshotFormat = config.GetBindable<ScreenshotFormat>(OsuSetting.ScreenshotFormat);
             captureMenuCursor = config.GetBindable<bool>(OsuSetting.ScreenshotCaptureMenuCursor);
 
-            shutter = audio.Sample.Get("UI/shutter");
+            shutter = audio.Samples.Get("UI/shutter");
         }
 
         public bool OnPressed(GlobalAction action)

osu.Game/Graphics/UserInterface/HoverClickSounds.cs

@@ -31,7 +31,7 @@ namespace osu.Game.Graphics.UserInterface
         [BackgroundDependencyLoader]
         private void load(AudioManager audio)
         {
-            sampleClick = audio.Sample.Get($@"UI/generic-select{SampleSet.GetDescription()}");
+            sampleClick = audio.Samples.Get($@"UI/generic-select{SampleSet.GetDescription()}");
         }
     }
 }

osu.Game/Graphics/UserInterface/HoverSounds.cs

@@ -37,7 +37,7 @@ namespace osu.Game.Graphics.UserInterface
         [BackgroundDependencyLoader]
         private void load(AudioManager audio)
         {
-            sampleHover = audio.Sample.Get($@"UI/generic-hover{SampleSet.GetDescription()}");
+            sampleHover = audio.Samples.Get($@"UI/generic-hover{SampleSet.GetDescription()}");
         }
     }
 

osu.Game/Graphics/UserInterface/OsuButton.cs

@@ -17,11 +17,11 @@ namespace osu.Game.Graphics.UserInterface
     /// <summary>
     /// A button with added default sound effects.
     /// </summary>
-    public class OsuButton : Button
+    public abstract class OsuButton : Button
     {
         private Box hover;
 
-        public OsuButton()
+        protected OsuButton()
         {
             Height = 40;
 

osu.Game/Graphics/UserInterface/OsuCheckbox.cs

@@ -78,7 +78,7 @@ namespace osu.Game.Graphics.UserInterface
 
             Current.DisabledChanged += disabled =>
             {
-                Alpha = disabled ? 0.3f : 1;
+                labelSpriteText.Alpha = Nub.Alpha = disabled ? 0.3f : 1;
             };
         }
 
@@ -112,8 +112,8 @@ namespace osu.Game.Graphics.UserInterface
         [BackgroundDependencyLoader]
         private void load(AudioManager audio)
         {
-            sampleChecked = audio.Sample.Get(@"UI/check-on");
+            sampleChecked = audio.Samples.Get(@"UI/check-on");
-            sampleUnchecked = audio.Sample.Get(@"UI/check-off");
+            sampleUnchecked = audio.Samples.Get(@"UI/check-off");
         }
     }
 }

osu.Game/Graphics/UserInterface/OsuMenu.cs

@@ -71,8 +71,8 @@ namespace osu.Game.Graphics.UserInterface
             [BackgroundDependencyLoader]
             private void load(AudioManager audio)
             {
-                sampleHover = audio.Sample.Get(@"UI/generic-hover");
+                sampleHover = audio.Samples.Get(@"UI/generic-hover");
-                sampleClick = audio.Sample.Get(@"UI/generic-select");
+                sampleClick = audio.Samples.Get(@"UI/generic-select");
 
                 BackgroundColour = Color4.Transparent;
                 BackgroundColourHover = OsuColour.FromHex(@"172023");

osu.Game/Graphics/UserInterface/OsuSliderBar.cs

@@ -86,7 +86,7 @@ namespace osu.Game.Graphics.UserInterface
         [BackgroundDependencyLoader]
         private void load(AudioManager audio, OsuColour colours)
         {
-            sample = audio.Sample.Get(@"UI/sliderbar-notch");
+            sample = audio.Samples.Get(@"UI/sliderbar-notch");
             AccentColour = colours.Pink;
         }
 

osu.Game/Graphics/UserInterface/ScreenTitle.cs

@@ -76,11 +76,11 @@ namespace osu.Game.Graphics.UserInterface
                             {
                                 titleText = new OsuSpriteText
                                 {
-                                    Font = OsuFont.GetFont(size: 25),
+                                    Font = OsuFont.GetFont(size: 30, weight: FontWeight.Light),
                                 },
                                 pageText = new OsuSpriteText
                                 {
-                                    Font = OsuFont.GetFont(size: 25),
+                                    Font = OsuFont.GetFont(size: 30, weight: FontWeight.Light),
                                 }
                             }
                         }

osu.Game/IO/Archives/ArchiveReader.cs

@@ -15,6 +15,8 @@ namespace osu.Game.IO.Archives
         /// </summary>
         public abstract Stream GetStream(string name);
 
+        public IEnumerable<string> GetAvailableResources() => Filenames;
+
         public abstract void Dispose();
 
         /// <summary>

osu.Game/Migrations/20180125143340_Settings.cs

@@ -16,7 +16,7 @@ namespace osu.Game.Migrations
                 {
                     ID = table.Column<int>(type: "INTEGER", nullable: false)
                         .Annotation("Sqlite:Autoincrement", true),
-                    Key = table.Column<int>(type: "INTEGER", nullable: false),
+                    Key = table.Column<int>(type: "TEXT", nullable: false),
                     RulesetID = table.Column<int>(type: "INTEGER", nullable: true),
                     Value = table.Column<string>(type: "TEXT", nullable: true),
                     Variant = table.Column<int>(type: "INTEGER", nullable: true)

osu.Game/Migrations/OsuDbContextModelSnapshot.cs

@@ -14,7 +14,7 @@ namespace osu.Game.Migrations
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "2.2.1-servicing-10028");
+                .HasAnnotation("ProductVersion", "2.2.4-servicing-10062");
 
             modelBuilder.Entity("osu.Game.Beatmaps.BeatmapDifficulty", b =>
                 {
@@ -198,7 +198,7 @@ namespace osu.Game.Migrations
                     b.Property<int>("ID")
                         .ValueGeneratedOnAdd();
 
-                    b.Property<int>("IntKey")
+                    b.Property<string>("Key")
                         .HasColumnName("Key");
 
                     b.Property<int?>("RulesetID");

osu.Game/Online/API/Requests/GetChangelogBuildRequest.cs

@@ -0,0 +1,21 @@
+// 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.Online.API.Requests.Responses;
+
+namespace osu.Game.Online.API.Requests
+{
+    public class GetChangelogBuildRequest : APIRequest<APIChangelogBuild>
+    {
+        private readonly string name;
+        private readonly string version;
+
+        public GetChangelogBuildRequest(string streamName, string buildVersion)
+        {
+            name = streamName;
+            version = buildVersion;
+        }
+
+        protected override string Target => $@"changelog/{name}/{version}";
+    }
+}

osu.Game/Online/API/Requests/GetChangelogRequest.cs

@@ -0,0 +1,12 @@
+// 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.Online.API.Requests.Responses;
+
+namespace osu.Game.Online.API.Requests
+{
+    public class GetChangelogRequest : APIRequest<APIChangelogIndex>
+    {
+        protected override string Target => @"changelog";
+    }
+}

osu.Game/Online/API/Requests/Responses/APIChangelogBuild.cs

@@ -0,0 +1,49 @@
+// 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 Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+
+namespace osu.Game.Online.API.Requests.Responses
+{
+    public class APIChangelogBuild : IEquatable<APIChangelogBuild>
+    {
+        [JsonProperty("id")]
+        public long Id { get; set; }
+
+        [JsonProperty("version")]
+        public string Version { get; set; }
+
+        [JsonProperty("display_version")]
+        public string DisplayVersion { get; set; }
+
+        [JsonProperty("users")]
+        public long Users { get; set; }
+
+        [JsonProperty("created_at")]
+        public DateTimeOffset CreatedAt { get; set; }
+
+        [JsonProperty("update_stream")]
+        public APIUpdateStream UpdateStream { get; set; }
+
+        [JsonProperty("changelog_entries")]
+        public List<APIChangelogEntry> ChangelogEntries { get; set; }
+
+        [JsonProperty("versions")]
+        public VersionNatigation Versions { get; set; }
+
+        public class VersionNatigation
+        {
+            [JsonProperty("next")]
+            public APIChangelogBuild Next { get; set; }
+
+            [JsonProperty("previous")]
+            public APIChangelogBuild Previous { get; set; }
+        }
+
+        public bool Equals(APIChangelogBuild other) => Id == other?.Id;
+
+        public override string ToString() => $"{UpdateStream.DisplayName} {DisplayVersion}";
+    }
+}

osu.Game/Online/API/Requests/Responses/APIChangelogEntry.cs

@@ -0,0 +1,47 @@
+// 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 Newtonsoft.Json;
+
+namespace osu.Game.Online.API.Requests.Responses
+{
+    public class APIChangelogEntry
+    {
+        [JsonProperty("id")]
+        public long? Id { get; set; }
+
+        [JsonProperty("repository")]
+        public string Repository { get; set; }
+
+        [JsonProperty("github_pull_request_id")]
+        public long? GithubPullRequestId { get; set; }
+
+        [JsonProperty("github_url")]
+        public string GithubUrl { get; set; }
+
+        [JsonProperty("url")]
+        public string Url { get; set; }
+
+        [JsonProperty("type")]
+        public string Type { get; set; }
+
+        [JsonProperty("category")]
+        public string Category { get; set; }
+
+        [JsonProperty("title")]
+        public string Title { get; set; }
+
+        [JsonProperty("message_html")]
+        public string MessageHtml { get; set; }
+
+        [JsonProperty("major")]
+        public bool? Major { get; set; }
+
+        [JsonProperty("created_at")]
+        public DateTimeOffset? CreatedAt { get; set; }
+
+        [JsonProperty("github_user")]
+        public APIChangelogUser GithubUser { get; set; }
+    }
+}

osu.Game/Online/API/Requests/Responses/APIChangelogIndex.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 System.Collections.Generic;
+using Newtonsoft.Json;
+
+namespace osu.Game.Online.API.Requests.Responses
+{
+    public class APIChangelogIndex
+    {
+        [JsonProperty]
+        public List<APIChangelogBuild> Builds;
+
+        [JsonProperty]
+        public List<APIUpdateStream> Streams;
+    }
+}

osu.Game/Online/API/Requests/Responses/APIChangelogUser.cs

@@ -0,0 +1,28 @@
+// 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 Newtonsoft.Json;
+
+namespace osu.Game.Online.API.Requests.Responses
+{
+    public class APIChangelogUser
+    {
+        [JsonProperty("id")]
+        public long? Id { get; set; }
+
+        [JsonProperty("display_name")]
+        public string DisplayName { get; set; }
+
+        [JsonProperty("github_url")]
+        public string GithubUrl { get; set; }
+
+        [JsonProperty("osu_username")]
+        public string OsuUsername { get; set; }
+
+        [JsonProperty("user_id")]
+        public long? UserId { get; set; }
+
+        [JsonProperty("user_url")]
+        public string UserUrl { get; set; }
+    }
+}

osu.Game/Online/API/Requests/Responses/APIUpdateStream.cs

@@ -0,0 +1,60 @@
+// 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 Newtonsoft.Json;
+using osu.Framework.Graphics.Colour;
+using osuTK.Graphics;
+
+namespace osu.Game.Online.API.Requests.Responses
+{
+    public class APIUpdateStream : IEquatable<APIUpdateStream>
+    {
+        [JsonProperty("id")]
+        public long Id { get; set; }
+
+        [JsonProperty("name")]
+        public string Name { get; set; }
+
+        [JsonProperty("is_featured")]
+        public bool IsFeatured { get; set; }
+
+        [JsonProperty("display_name")]
+        public string DisplayName { get; set; }
+
+        [JsonProperty("latest_build")]
+        public APIChangelogBuild LatestBuild { get; set; }
+
+        public bool Equals(APIUpdateStream other) => Id == other?.Id;
+
+        public ColourInfo Colour
+        {
+            get
+            {
+                switch (Name)
+                {
+                    case "stable40":
+                        return new Color4(102, 204, 255, 255);
+
+                    case "stable":
+                        return new Color4(34, 153, 187, 255);
+
+                    case "beta40":
+                        return new Color4(255, 221, 85, 255);
+
+                    case "cuttingedge":
+                        return new Color4(238, 170, 0, 255);
+
+                    case "lazer":
+                        return new Color4(237, 18, 33, 255);
+
+                    case "web":
+                        return new Color4(136, 102, 238, 255);
+
+                    default:
+                        return new Color4(0, 0, 0, 255);
+                }
+            }
+        }
+    }
+}

osu.Game/Online/Chat/ChannelManager.cs

@@ -81,6 +81,9 @@ namespace osu.Game.Online.Chat
             if (user == null)
                 throw new ArgumentNullException(nameof(user));
 
+            if (user.Id == api.LocalUser.Value.Id)
+                return;
+
             CurrentChannel.Value = JoinedChannels.FirstOrDefault(c => c.Type == ChannelType.PM && c.Users.Count == 1 && c.Users.Any(u => u.Id == user.Id))
                                    ?? new Channel(user);
         }

osu.Game/OsuGame.cs

@@ -435,6 +435,7 @@ namespace osu.Game
             loadComponentSingleFile(channelManager = new ChannelManager(), AddInternal, true);
             loadComponentSingleFile(chatOverlay = new ChatOverlay(), overlayContent.Add, true);
             loadComponentSingleFile(settings = new SettingsOverlay { GetToolbarHeight = () => ToolbarOffset }, leftFloatingOverlayContent.Add, true);
+            var changelogOverlay = loadComponentSingleFile(new ChangelogOverlay(), overlayContent.Add, true);
             loadComponentSingleFile(userProfile = new UserProfileOverlay(), overlayContent.Add, true);
             loadComponentSingleFile(beatmapSetOverlay = new BeatmapSetOverlay(), overlayContent.Add, true);
 
@@ -492,7 +493,7 @@ namespace osu.Game
             }
 
             // ensure only one of these overlays are open at once.
-            var singleDisplayOverlays = new OverlayContainer[] { chatOverlay, social, direct };
+            var singleDisplayOverlays = new OverlayContainer[] { chatOverlay, social, direct, changelogOverlay };
             overlays.AddRange(singleDisplayOverlays);
 
             foreach (var overlay in singleDisplayOverlays)

osu.Game/OsuGameBase.cs

@@ -161,7 +161,7 @@ namespace osu.Game
 
             dependencies.CacheAs<IAPIProvider>(API);
 
-            var defaultBeatmap = new DummyWorkingBeatmap(this);
+            var defaultBeatmap = new DummyWorkingBeatmap(Audio, Textures);
 
             dependencies.Cache(RulesetStore = new RulesetStore(contextFactory));
             dependencies.Cache(FileStore = new FileStore(contextFactory, Host.Storage));
@@ -193,9 +193,9 @@ namespace osu.Game
 
             // tracks play so loud our samples can't keep up.
             // this adds a global reduction of track volume for the time being.
-            Audio.Track.AddAdjustment(AdjustableProperty.Volume, new BindableDouble(0.8));
+            Audio.Tracks.AddAdjustment(AdjustableProperty.Volume, new BindableDouble(0.8));
 
-            beatmap = new OsuBindableBeatmap(defaultBeatmap, Audio);
+            beatmap = new OsuBindableBeatmap(defaultBeatmap);
 
             dependencies.CacheAs<IBindable<WorkingBeatmap>>(beatmap);
             dependencies.CacheAs(beatmap);
@@ -281,23 +281,10 @@ namespace osu.Game
 
         private class OsuBindableBeatmap : BindableBeatmap
         {
-            public OsuBindableBeatmap(WorkingBeatmap defaultValue, AudioManager audioManager)
-                : this(defaultValue)
-            {
-                RegisterAudioManager(audioManager);
-            }
-
             public OsuBindableBeatmap(WorkingBeatmap defaultValue)
                 : base(defaultValue)
             {
             }
-
-            public override BindableBeatmap GetBoundCopy()
-            {
-                var copy = new OsuBindableBeatmap(Default);
-                copy.BindTo(this);
-                return copy;
-            }
         }
 
         private class OsuUserInputManager : UserInputManager

osu.Game/Overlays/Changelog/ChangelogBuild.cs

@@ -0,0 +1,167 @@
+// 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.Containers;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Containers;
+using osu.Game.Online.API.Requests.Responses;
+using System;
+using System.Linq;
+using System.Text.RegularExpressions;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Users;
+using osuTK.Graphics;
+
+namespace osu.Game.Overlays.Changelog
+{
+    public class ChangelogBuild : FillFlowContainer
+    {
+        public const float HORIZONTAL_PADDING = 70;
+
+        public Action<APIChangelogBuild> SelectBuild;
+
+        protected readonly APIChangelogBuild Build;
+
+        public readonly FillFlowContainer ChangelogEntries;
+
+        public ChangelogBuild(APIChangelogBuild build)
+        {
+            Build = build;
+
+            RelativeSizeAxes = Axes.X;
+            AutoSizeAxes = Axes.Y;
+            Direction = FillDirection.Vertical;
+            Padding = new MarginPadding { Horizontal = HORIZONTAL_PADDING };
+
+            Children = new Drawable[]
+            {
+                CreateHeader(),
+                ChangelogEntries = new FillFlowContainer
+                {
+                    RelativeSizeAxes = Axes.X,
+                    AutoSizeAxes = Axes.Y,
+                    Direction = FillDirection.Vertical,
+                },
+            };
+
+            foreach (var categoryEntries in build.ChangelogEntries.GroupBy(b => b.Category).OrderBy(c => c.Key))
+            {
+                ChangelogEntries.Add(new OsuSpriteText
+                {
+                    Text = categoryEntries.Key,
+                    Font = OsuFont.GetFont(weight: FontWeight.Bold, size: 24),
+                    Margin = new MarginPadding { Top = 35, Bottom = 15 },
+                });
+
+                var fontLarge = OsuFont.GetFont(size: 18);
+                var fontMedium = OsuFont.GetFont(size: 14);
+                var fontSmall = OsuFont.GetFont(size: 12);
+
+                foreach (APIChangelogEntry entry in categoryEntries)
+                {
+                    LinkFlowContainer title = new LinkFlowContainer
+                    {
+                        Direction = FillDirection.Full,
+                        RelativeSizeAxes = Axes.X,
+                        AutoSizeAxes = Axes.Y,
+                        Margin = new MarginPadding { Vertical = 5 },
+                    };
+
+                    title.AddIcon(FontAwesome.Solid.Check, t =>
+                    {
+                        t.Font = fontSmall;
+                        t.Padding = new MarginPadding { Left = -17, Right = 5 };
+                    });
+
+                    title.AddText(entry.Title, t => { t.Font = fontLarge; });
+
+                    if (!string.IsNullOrEmpty(entry.Repository))
+                    {
+                        title.AddText(" (", t => t.Font = fontLarge);
+                        title.AddLink($"{entry.Repository.Replace("ppy/", "")}#{entry.GithubPullRequestId}", entry.GithubUrl, Online.Chat.LinkAction.External,
+                            creationParameters: t => { t.Font = fontLarge; });
+                        title.AddText(")", t => t.Font = fontLarge);
+                    }
+
+                    title.AddText(" by ", t => t.Font = fontMedium);
+
+                    if (entry.GithubUser.UserId != null)
+                        title.AddUserLink(new User
+                        {
+                            Username = entry.GithubUser.OsuUsername,
+                            Id = entry.GithubUser.UserId.Value
+                        }, t => t.Font = fontMedium);
+                    else if (entry.GithubUser.GithubUrl != null)
+                        title.AddLink(entry.GithubUser.DisplayName, entry.GithubUser.GithubUrl, Online.Chat.LinkAction.External, null, null, t => t.Font = fontMedium);
+                    else
+                        title.AddText(entry.GithubUser.DisplayName, t => t.Font = fontSmall);
+
+                    ChangelogEntries.Add(title);
+
+                    if (!string.IsNullOrEmpty(entry.MessageHtml))
+                    {
+                        TextFlowContainer message = new TextFlowContainer
+                        {
+                            AutoSizeAxes = Axes.Y,
+                            RelativeSizeAxes = Axes.X,
+                        };
+
+                        // todo: use markdown parsing once API returns markdown
+                        message.AddText(Regex.Replace(entry.MessageHtml, @"<(.|\n)*?>", string.Empty), t =>
+                        {
+                            t.Font = fontSmall;
+                            t.Colour = new Color4(235, 184, 254, 255);
+                        });
+
+                        ChangelogEntries.Add(message);
+                    }
+                }
+            }
+        }
+
+        protected virtual FillFlowContainer CreateHeader() => new FillFlowContainer
+        {
+            Anchor = Anchor.TopCentre,
+            Origin = Anchor.TopCentre,
+            AutoSizeAxes = Axes.Both,
+            Direction = FillDirection.Horizontal,
+            Margin = new MarginPadding { Top = 20 },
+            Children = new Drawable[]
+            {
+                new OsuHoverContainer
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    AutoSizeAxes = Axes.Both,
+                    Action = () => SelectBuild?.Invoke(Build),
+                    Child = new FillFlowContainer<SpriteText>
+                    {
+                        AutoSizeAxes = Axes.Both,
+                        Margin = new MarginPadding { Horizontal = 40 },
+                        Children = new[]
+                        {
+                            new OsuSpriteText
+                            {
+                                Text = Build.UpdateStream.DisplayName,
+                                Font = OsuFont.GetFont(weight: FontWeight.Medium, size: 19),
+                            },
+                            new OsuSpriteText
+                            {
+                                Text = " ",
+                                Font = OsuFont.GetFont(weight: FontWeight.Medium, size: 19),
+                            },
+                            new OsuSpriteText
+                            {
+                                Text = Build.DisplayVersion,
+                                Font = OsuFont.GetFont(weight: FontWeight.Light, size: 19),
+                                Colour = Build.UpdateStream.Colour,
+                            },
+                        }
+                    }
+                },
+            }
+        };
+    }
+}

osu.Game/Overlays/Changelog/ChangelogContent.cs

@@ -0,0 +1,25 @@
+// 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.Containers;
+using osu.Game.Online.API.Requests.Responses;
+using System;
+
+namespace osu.Game.Overlays.Changelog
+{
+    public class ChangelogContent : FillFlowContainer
+    {
+        public Action<APIChangelogBuild> BuildSelected;
+
+        public void SelectBuild(APIChangelogBuild build) => BuildSelected?.Invoke(build);
+
+        public ChangelogContent()
+        {
+            RelativeSizeAxes = Axes.X;
+            AutoSizeAxes = Axes.Y;
+            Direction = FillDirection.Vertical;
+            Padding = new MarginPadding { Bottom = 100 };
+        }
+    }
+}

osu.Game/Overlays/Changelog/ChangelogHeader.cs

@@ -0,0 +1,170 @@
+// 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.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Graphics.Textures;
+using osu.Game.Graphics;
+using osu.Game.Graphics.UserInterface;
+using osu.Game.Online.API.Requests.Responses;
+using osuTK;
+
+namespace osu.Game.Overlays.Changelog
+{
+    public class ChangelogHeader : OverlayHeader
+    {
+        public readonly Bindable<APIChangelogBuild> Current = new Bindable<APIChangelogBuild>();
+
+        public Action ListingSelected;
+
+        public UpdateStreamBadgeArea Streams;
+
+        private const string listing_string = "Listing";
+
+        public ChangelogHeader()
+        {
+            TabControl.AddItem(listing_string);
+            TabControl.Current.ValueChanged += e =>
+            {
+                if (e.NewValue == listing_string)
+                    ListingSelected?.Invoke();
+            };
+
+            Current.ValueChanged += showBuild;
+
+            Streams.Current.ValueChanged += e =>
+            {
+                if (e.NewValue?.LatestBuild != null && e.NewValue != Current.Value?.UpdateStream)
+                    Current.Value = e.NewValue.LatestBuild;
+            };
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            TabControl.AccentColour = colours.Violet;
+        }
+
+        private ChangelogHeaderTitle title;
+
+        private void showBuild(ValueChangedEvent<APIChangelogBuild> e)
+        {
+            if (e.OldValue != null)
+                TabControl.RemoveItem(e.OldValue.ToString());
+
+            if (e.NewValue != null)
+            {
+                TabControl.AddItem(e.NewValue.ToString());
+                TabControl.Current.Value = e.NewValue.ToString();
+
+                Streams.Current.Value = Streams.Items.FirstOrDefault(s => s.Name == e.NewValue.UpdateStream.Name);
+
+                title.Version = e.NewValue.UpdateStream.DisplayName;
+            }
+            else
+            {
+                TabControl.Current.Value = listing_string;
+                Streams.Current.Value = null;
+                title.Version = null;
+            }
+        }
+
+        protected override Drawable CreateBackground() => new HeaderBackground();
+
+        protected override Drawable CreateContent() => new Container
+        {
+            RelativeSizeAxes = Axes.X,
+            AutoSizeAxes = Axes.Y,
+            Children = new Drawable[]
+            {
+                Streams = new UpdateStreamBadgeArea(),
+            }
+        };
+
+        protected override ScreenTitle CreateTitle() => title = new ChangelogHeaderTitle();
+
+        public class HeaderBackground : Sprite
+        {
+            public HeaderBackground()
+            {
+                RelativeSizeAxes = Axes.Both;
+                FillMode = FillMode.Fill;
+            }
+
+            [BackgroundDependencyLoader]
+            private void load(TextureStore textures)
+            {
+                Texture = textures.Get(@"Headers/changelog");
+            }
+        }
+
+        private class ChangelogHeaderTitle : ScreenTitle
+        {
+            public string Version
+            {
+                set => Section = value ?? listing_string;
+            }
+
+            public ChangelogHeaderTitle()
+            {
+                Title = "Changelog";
+                Version = null;
+            }
+
+            [BackgroundDependencyLoader]
+            private void load(OsuColour colours)
+            {
+                AccentColour = colours.Violet;
+            }
+
+            protected override Drawable CreateIcon() => new ChangelogIcon();
+
+            internal class ChangelogIcon : CompositeDrawable
+            {
+                private const float circle_allowance = 0.8f;
+
+                [BackgroundDependencyLoader]
+                private void load(TextureStore textures, OsuColour colours)
+                {
+                    Size = new Vector2(ICON_SIZE / circle_allowance);
+
+                    InternalChildren = new Drawable[]
+                    {
+                        new CircularContainer
+                        {
+                            Masking = true,
+                            BorderColour = colours.Violet,
+                            BorderThickness = 3,
+                            MaskingSmoothness = 1,
+                            RelativeSizeAxes = Axes.Both,
+                            Children = new Drawable[]
+                            {
+                                new Sprite
+                                {
+                                    RelativeSizeAxes = Axes.Both,
+                                    Texture = textures.Get(@"Icons/changelog"),
+                                    Size = new Vector2(circle_allowance),
+                                    Anchor = Anchor.Centre,
+                                    Origin = Anchor.Centre,
+                                },
+                                new Box
+                                {
+                                    RelativeSizeAxes = Axes.Both,
+                                    Colour = colours.Violet,
+                                    Alpha = 0,
+                                    AlwaysPresent = true,
+                                },
+                            }
+                        },
+                    };
+                }
+            }
+        }
+    }
+}

osu.Game/Overlays/Changelog/ChangelogListing.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 System;
+using System.Collections.Generic;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Online.API.Requests.Responses;
+using osuTK.Graphics;
+
+namespace osu.Game.Overlays.Changelog
+{
+    public class ChangelogListing : ChangelogContent
+    {
+        private readonly List<APIChangelogBuild> entries;
+
+        public ChangelogListing(List<APIChangelogBuild> entries)
+        {
+            this.entries = entries;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            DateTime currentDate = DateTime.MinValue;
+
+            if (entries == null) return;
+
+            foreach (APIChangelogBuild build in entries)
+            {
+                if (build.CreatedAt.Date != currentDate)
+                {
+                    if (Children.Count != 0)
+                    {
+                        Add(new Box
+                        {
+                            RelativeSizeAxes = Axes.X,
+                            Height = 2,
+                            Colour = new Color4(17, 17, 17, 255),
+                            Margin = new MarginPadding { Top = 30 },
+                        });
+                    }
+
+                    Add(new OsuSpriteText
+                    {
+                        Anchor = Anchor.TopCentre,
+                        Origin = Anchor.TopCentre,
+                        Margin = new MarginPadding { Top = 15 },
+                        Text = build.CreatedAt.Date.ToString("dd MMM yyyy"),
+                        Font = OsuFont.GetFont(weight: FontWeight.Regular, size: 24),
+                        Colour = OsuColour.FromHex(@"FD5"),
+                    });
+
+                    currentDate = build.CreatedAt.Date;
+                }
+                else
+                {
+                    Add(new Container
+                    {
+                        RelativeSizeAxes = Axes.X,
+                        Height = 1,
+                        Padding = new MarginPadding { Horizontal = ChangelogBuild.HORIZONTAL_PADDING },
+                        Margin = new MarginPadding { Top = 30 },
+                        Child = new Box
+                        {
+                            RelativeSizeAxes = Axes.Both,
+                            Colour = new Color4(32, 24, 35, 255),
+                        }
+                    });
+                }
+
+                Add(new ChangelogBuild(build) { SelectBuild = SelectBuild });
+            }
+        }
+    }
+}

osu.Game/Overlays/Changelog/ChangelogSingleBuild.cs

@@ -0,0 +1,142 @@
+// 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.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using osu.Framework.Allocation;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Containers;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Graphics.UserInterface;
+using osu.Game.Online.API;
+using osu.Game.Online.API.Requests;
+using osu.Game.Online.API.Requests.Responses;
+using osuTK;
+
+namespace osu.Game.Overlays.Changelog
+{
+    public class ChangelogSingleBuild : ChangelogContent
+    {
+        private APIChangelogBuild build;
+
+        public ChangelogSingleBuild(APIChangelogBuild build)
+        {
+            this.build = build;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(CancellationToken? cancellation, IAPIProvider api)
+        {
+            bool complete = false;
+
+            var req = new GetChangelogBuildRequest(build.UpdateStream.Name, build.Version);
+            req.Success += res =>
+            {
+                build = res;
+                complete = true;
+            };
+            req.Failure += _ => complete = true;
+
+            // This is done on a separate thread to support cancellation below
+            Task.Run(() => req.Perform(api));
+
+            while (!complete)
+            {
+                if (cancellation?.IsCancellationRequested == true)
+                {
+                    req.Cancel();
+                    return;
+                }
+
+                Thread.Sleep(10);
+            }
+
+            if (build != null)
+                Child = new ChangelogBuildWithNavigation(build) { SelectBuild = SelectBuild };
+        }
+
+        public class ChangelogBuildWithNavigation : ChangelogBuild
+        {
+            public ChangelogBuildWithNavigation(APIChangelogBuild build)
+                : base(build)
+            {
+            }
+
+            protected override FillFlowContainer CreateHeader()
+            {
+                var fill = base.CreateHeader();
+
+                foreach (var existing in fill.Children.OfType<OsuHoverContainer>())
+                {
+                    existing.Scale = new Vector2(1.25f);
+                    existing.Action = null;
+
+                    existing.Add(new OsuSpriteText
+                    {
+                        Text = Build.CreatedAt.Date.ToString("dd MMM yyyy"),
+                        Font = OsuFont.GetFont(weight: FontWeight.Regular, size: 14),
+                        Colour = OsuColour.FromHex(@"FD5"),
+                        Anchor = Anchor.BottomCentre,
+                        Origin = Anchor.TopCentre,
+                        Margin = new MarginPadding { Top = 5 },
+                    });
+                }
+
+                NavigationIconButton left, right;
+
+                fill.AddRange(new[]
+                {
+                    left = new NavigationIconButton(Build.Versions?.Previous)
+                    {
+                        Icon = FontAwesome.Solid.ChevronLeft,
+                        SelectBuild = b => SelectBuild(b)
+                    },
+                    right = new NavigationIconButton(Build.Versions?.Next)
+                    {
+                        Icon = FontAwesome.Solid.ChevronRight,
+                        SelectBuild = b => SelectBuild(b)
+                    },
+                });
+
+                fill.SetLayoutPosition(left, -1);
+                fill.SetLayoutPosition(right, 1);
+
+                return fill;
+            }
+        }
+
+        private class NavigationIconButton : IconButton
+        {
+            public Action<APIChangelogBuild> SelectBuild;
+
+            public NavigationIconButton(APIChangelogBuild build)
+            {
+                Anchor = Anchor.Centre;
+                Origin = Anchor.Centre;
+
+                if (build == null) return;
+
+                TooltipText = build.DisplayVersion;
+
+                Action = () =>
+                {
+                    SelectBuild?.Invoke(build);
+                    Enabled.Value = false;
+                };
+            }
+
+            [BackgroundDependencyLoader]
+            private void load(OsuColour colours)
+            {
+                HoverColour = colours.GreyVioletLight.Opacity(0.6f);
+                FlashColour = colours.GreyVioletLighter;
+            }
+        }
+    }
+}

osu.Game/Overlays/Changelog/UpdateStreamBadge.cs

@@ -0,0 +1,157 @@
+// 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 Humanizer;
+using osu.Framework.Allocation;
+using osu.Framework.Audio;
+using osu.Framework.Audio.Sample;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Input.Events;
+using osu.Game.Graphics;
+using osu.Game.Online.API.Requests.Responses;
+using osu.Framework.Graphics.UserInterface;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Graphics.UserInterface;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Overlays.Changelog
+{
+    public class UpdateStreamBadge : TabItem<APIUpdateStream>
+    {
+        private const float badge_height = 66.5f;
+        private const float badge_width = 100;
+        private const float transition_duration = 100;
+
+        private readonly ExpandingBar expandingBar;
+        private SampleChannel sampleClick;
+        private SampleChannel sampleHover;
+
+        private readonly FillFlowContainer<SpriteText> text;
+
+        public readonly Bindable<APIUpdateStream> SelectedTab = new Bindable<APIUpdateStream>();
+
+        private readonly Container fadeContainer;
+
+        public UpdateStreamBadge(APIUpdateStream stream)
+            : base(stream)
+        {
+            Size = new Vector2(stream.IsFeatured ? badge_width * 2 : badge_width, badge_height);
+            Padding = new MarginPadding(5);
+
+            Child = fadeContainer = new Container
+            {
+                RelativeSizeAxes = Axes.Both,
+                Children = new Drawable[]
+                {
+                    text = new FillFlowContainer<SpriteText>
+                    {
+                        AutoSizeAxes = Axes.X,
+                        RelativeSizeAxes = Axes.Y,
+                        Direction = FillDirection.Vertical,
+                        Children = new[]
+                        {
+                            new OsuSpriteText
+                            {
+                                Text = stream.DisplayName,
+                                Font = OsuFont.GetFont(weight: FontWeight.Bold, size: 12),
+                                Margin = new MarginPadding { Top = 6 },
+                            },
+                            new OsuSpriteText
+                            {
+                                Text = stream.LatestBuild.DisplayVersion,
+                                Font = OsuFont.GetFont(weight: FontWeight.Light, size: 16),
+                            },
+                            new OsuSpriteText
+                            {
+                                Text = stream.LatestBuild.Users > 0 ? $"{stream.LatestBuild.Users:N0} {"user".Pluralize(stream.LatestBuild.Users == 1)} online" : null,
+                                Font = OsuFont.GetFont(weight: FontWeight.Regular, size: 10),
+                                Colour = new Color4(203, 164, 218, 255),
+                            },
+                        }
+                    },
+                    expandingBar = new ExpandingBar
+                    {
+                        Anchor = Anchor.TopCentre,
+                        Colour = stream.Colour,
+                        ExpandedSize = 4,
+                        CollapsedSize = 2,
+                        IsCollapsed = true
+                    },
+                }
+            };
+
+            SelectedTab.BindValueChanged(_ => updateState(), true);
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(AudioManager audio)
+        {
+            sampleClick = audio.Samples.Get(@"UI/generic-select-soft");
+            sampleHover = audio.Samples.Get(@"UI/generic-hover-soft");
+        }
+
+        protected override void OnActivated() => updateState();
+
+        protected override void OnDeactivated() => updateState();
+
+        protected override bool OnClick(ClickEvent e)
+        {
+            sampleClick?.Play();
+            return base.OnClick(e);
+        }
+
+        protected override bool OnHover(HoverEvent e)
+        {
+            sampleHover?.Play();
+            updateState();
+
+            return base.OnHover(e);
+        }
+
+        protected override void OnHoverLost(HoverLostEvent e)
+        {
+            updateState();
+            base.OnHoverLost(e);
+        }
+
+        private void updateState()
+        {
+            // Expand based on the local state
+            bool shouldExpand = Active.Value || IsHovered;
+
+            // Expand based on whether no build is selected and the badge area is hovered
+            shouldExpand |= SelectedTab.Value == null && !externalDimRequested;
+
+            if (shouldExpand)
+            {
+                expandingBar.Expand();
+                fadeContainer.FadeTo(1, transition_duration);
+            }
+            else
+            {
+                expandingBar.Collapse();
+                fadeContainer.FadeTo(0.5f, transition_duration);
+            }
+
+            text.FadeTo(externalDimRequested && !IsHovered ? 0.5f : 1, transition_duration);
+        }
+
+        private bool externalDimRequested;
+
+        public void EnableDim()
+        {
+            externalDimRequested = true;
+            updateState();
+        }
+
+        public void DisableDim()
+        {
+            externalDimRequested = false;
+            updateState();
+        }
+    }
+}

osu.Game/Overlays/Changelog/UpdateStreamBadgeArea.cs

@@ -0,0 +1,75 @@
+// 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.Input.Events;
+using osu.Game.Online.API.Requests.Responses;
+using System.Collections.Generic;
+using System.Linq;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Graphics.UserInterface;
+using osuTK.Graphics;
+
+namespace osu.Game.Overlays.Changelog
+{
+    public class UpdateStreamBadgeArea : TabControl<APIUpdateStream>
+    {
+        public UpdateStreamBadgeArea()
+        {
+            RelativeSizeAxes = Axes.X;
+            AutoSizeAxes = Axes.Y;
+
+            AddInternal(new Box
+            {
+                Colour = Color4.Black,
+                Alpha = 0.12f,
+                RelativeSizeAxes = Axes.Both,
+            });
+        }
+
+        public void Populate(List<APIUpdateStream> streams)
+        {
+            Current.Value = null;
+
+            foreach (APIUpdateStream updateStream in streams)
+                AddItem(updateStream);
+        }
+
+        protected override bool OnHover(HoverEvent e)
+        {
+            foreach (UpdateStreamBadge streamBadge in TabContainer.Children.OfType<UpdateStreamBadge>())
+                streamBadge.EnableDim();
+
+            return base.OnHover(e);
+        }
+
+        protected override void OnHoverLost(HoverLostEvent e)
+        {
+            foreach (UpdateStreamBadge streamBadge in TabContainer.Children.OfType<UpdateStreamBadge>())
+                streamBadge.DisableDim();
+
+            base.OnHoverLost(e);
+        }
+
+        protected override TabFillFlowContainer CreateTabFlow()
+        {
+            var flow = base.CreateTabFlow();
+
+            flow.RelativeSizeAxes = Axes.X;
+            flow.AutoSizeAxes = Axes.Y;
+            flow.AllowMultiline = true;
+            flow.Padding = new MarginPadding
+            {
+                Vertical = 20,
+                Horizontal = 85,
+            };
+
+            return flow;
+        }
+
+        protected override Dropdown<APIUpdateStream> CreateDropdown() => null;
+
+        protected override TabItem<APIUpdateStream> CreateTabItem(APIUpdateStream value) =>
+            new UpdateStreamBadge(value) { SelectedTab = { BindTarget = Current } };
+    }
+}

osu.Game/Overlays/ChangelogOverlay.cs

@@ -0,0 +1,210 @@
+// 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.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using JetBrains.Annotations;
+using osu.Framework.Allocation;
+using osu.Framework.Audio;
+using osu.Framework.Audio.Sample;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Containers;
+using osu.Game.Input.Bindings;
+using osu.Game.Online.API.Requests;
+using osu.Game.Online.API.Requests.Responses;
+using osu.Game.Overlays.Changelog;
+
+namespace osu.Game.Overlays
+{
+    public class ChangelogOverlay : FullscreenOverlay
+    {
+        public readonly Bindable<APIChangelogBuild> Current = new Bindable<APIChangelogBuild>();
+
+        private ChangelogHeader header;
+
+        private Container<ChangelogContent> content;
+
+        private SampleChannel sampleBack;
+
+        private List<APIChangelogBuild> builds;
+
+        private List<APIUpdateStream> streams;
+
+        [BackgroundDependencyLoader]
+        private void load(AudioManager audio, OsuColour colour)
+        {
+            Waves.FirstWaveColour = colour.GreyVioletLight;
+            Waves.SecondWaveColour = colour.GreyViolet;
+            Waves.ThirdWaveColour = colour.GreyVioletDark;
+            Waves.FourthWaveColour = colour.GreyVioletDarker;
+
+            Children = new Drawable[]
+            {
+                new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Colour = colour.PurpleDarkAlternative,
+                },
+                new ScrollContainer
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    ScrollbarVisible = false,
+                    Child = new ReverseChildIDFillFlowContainer<Drawable>
+                    {
+                        RelativeSizeAxes = Axes.X,
+                        AutoSizeAxes = Axes.Y,
+                        Direction = FillDirection.Vertical,
+                        Children = new Drawable[]
+                        {
+                            header = new ChangelogHeader
+                            {
+                                ListingSelected = ShowListing,
+                            },
+                            content = new Container<ChangelogContent>
+                            {
+                                RelativeSizeAxes = Axes.X,
+                                AutoSizeAxes = Axes.Y,
+                            }
+                        },
+                    },
+                },
+            };
+
+            sampleBack = audio.Samples.Get(@"UI/generic-select-soft");
+
+            header.Current.BindTo(Current);
+
+            Current.BindValueChanged(e =>
+            {
+                if (e.NewValue != null)
+                    loadContent(new ChangelogSingleBuild(e.NewValue));
+                else
+                    loadContent(new ChangelogListing(builds));
+            });
+        }
+
+        public void ShowListing()
+        {
+            Current.Value = null;
+            State = Visibility.Visible;
+        }
+
+        /// <summary>
+        /// Fetches and shows a specific build from a specific update stream.
+        /// </summary>
+        /// <param name="build">Must contain at least <see cref="APIUpdateStream.Name"/> and
+        /// <see cref="APIChangelogBuild.Version"/>. If <see cref="APIUpdateStream.DisplayName"/> and
+        /// <see cref="APIChangelogBuild.DisplayVersion"/> are specified, the header will instantly display them.</param>
+        public void ShowBuild([NotNull] APIChangelogBuild build)
+        {
+            if (build == null) throw new ArgumentNullException(nameof(build));
+
+            Current.Value = build;
+            State = Visibility.Visible;
+        }
+
+        public void ShowBuild([NotNull] string updateStream, [NotNull] string version)
+        {
+            if (updateStream == null) throw new ArgumentNullException(nameof(updateStream));
+            if (version == null) throw new ArgumentNullException(nameof(version));
+
+            performAfterFetch(() =>
+            {
+                var build = builds.Find(b => b.Version == version && b.UpdateStream.Name == updateStream)
+                            ?? streams.Find(s => s.Name == updateStream)?.LatestBuild;
+
+                if (build != null)
+                    ShowBuild(build);
+            });
+
+            State = Visibility.Visible;
+        }
+
+        public override bool OnPressed(GlobalAction action)
+        {
+            switch (action)
+            {
+                case GlobalAction.Back:
+                    if (Current.Value == null)
+                    {
+                        State = Visibility.Hidden;
+                    }
+                    else
+                    {
+                        Current.Value = null;
+                        sampleBack?.Play();
+                    }
+
+                    return true;
+            }
+
+            return false;
+        }
+
+        protected override void PopIn()
+        {
+            base.PopIn();
+
+            if (initialFetchTask == null)
+                // fetch and refresh to show listing, if no other request was made via Show methods
+                performAfterFetch(() => Current.TriggerChange());
+        }
+
+        private Task initialFetchTask;
+
+        private void performAfterFetch(Action action) => fetchListing()?.ContinueWith(_ => Schedule(action));
+
+        private Task fetchListing()
+        {
+            if (initialFetchTask != null)
+                return initialFetchTask;
+
+            return initialFetchTask = Task.Run(async () =>
+            {
+                var tcs = new TaskCompletionSource<bool>();
+
+                var req = new GetChangelogRequest();
+                req.Success += res =>
+                {
+                    // remap streams to builds to ensure model equality
+                    res.Builds.ForEach(b => b.UpdateStream = res.Streams.Find(s => s.Id == b.UpdateStream.Id));
+                    res.Streams.ForEach(s => s.LatestBuild.UpdateStream = res.Streams.Find(s2 => s2.Id == s.LatestBuild.UpdateStream.Id));
+
+                    builds = res.Builds;
+                    streams = res.Streams;
+
+                    header.Streams.Populate(res.Streams);
+
+                    tcs.SetResult(true);
+                };
+                req.Failure += _ => initialFetchTask = null;
+                req.Perform(API);
+
+                await tcs.Task;
+            });
+        }
+
+        private CancellationTokenSource loadContentCancellation;
+
+        private void loadContent(ChangelogContent newContent)
+        {
+            content.FadeTo(0.2f, 300, Easing.OutQuint);
+
+            loadContentCancellation?.Cancel();
+
+            LoadComponentAsync(newContent, c =>
+            {
+                content.FadeIn(300, Easing.OutQuint);
+
+                c.BuildSelected = ShowBuild;
+                content.Child = c;
+            }, (loadContentCancellation = new CancellationTokenSource()).Token);
+        }
+    }
+}

osu.Game/Overlays/Chat/ChatLine.cs

@@ -3,6 +3,7 @@
 
 using System;
 using System.Linq;
+using System.Collections.Generic;
 using osu.Framework.Allocation;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
@@ -14,6 +15,7 @@ using osu.Game.Graphics;
 using osu.Game.Graphics.Containers;
 using osu.Game.Graphics.Sprites;
 using osu.Game.Graphics.UserInterface;
+using osu.Game.Online.API;
 using osu.Game.Online.Chat;
 using osu.Game.Users;
 using osuTK;
@@ -201,6 +203,9 @@ namespace osu.Game.Overlays.Chat
 
             private Action startChatAction;
 
+            [Resolved]
+            private IAPIProvider api { get; set; }
+
             public MessageSender(User sender)
             {
                 this.sender = sender;
@@ -213,11 +218,21 @@ namespace osu.Game.Overlays.Chat
                 startChatAction = () => chatManager?.OpenPrivateChannel(sender);
             }
 
-            public MenuItem[] ContextMenuItems => new MenuItem[]
+            public MenuItem[] ContextMenuItems
             {
-                new OsuMenuItem("View Profile", MenuItemType.Highlighted, Action),
+                get
-                new OsuMenuItem("Start Chat", MenuItemType.Standard, startChatAction),
+                {
-            };
+                    List<MenuItem> items = new List<MenuItem>
+                    {
+                        new OsuMenuItem("View Profile", MenuItemType.Highlighted, Action)
+                    };
+
+                    if (sender.Id != api.LocalUser.Value.Id)
+                        items.Add(new OsuMenuItem("Start Chat", MenuItemType.Standard, startChatAction));
+
+                    return items.ToArray();
+                }
+            }
         }
 
         private static readonly Color4[] username_colours =

osu.Game/Overlays/KeyBindingPanel.cs

@@ -3,22 +3,14 @@
 
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
-using osu.Framework.Graphics.Sprites;
-using osu.Framework.Input.Bindings;
-using osu.Framework.Input.Events;
-using osu.Game.Graphics;
-using osu.Game.Graphics.Containers;
-using osu.Game.Graphics.Sprites;
 using osu.Game.Input.Bindings;
 using osu.Game.Overlays.KeyBinding;
 using osu.Game.Overlays.Settings;
 using osu.Game.Rulesets;
-using osu.Game.Screens.Ranking;
-using osuTK;
 
 namespace osu.Game.Overlays
 {
-    public class KeyBindingPanel : SettingsPanel
+    public class KeyBindingPanel : SettingsSubPanel
     {
         protected override Drawable CreateHeader() => new SettingsHeader("key configuration", "Customise your keys!");
 
@@ -29,84 +21,6 @@ namespace osu.Game.Overlays
 
             foreach (var ruleset in rulesets.AvailableRulesets)
                 AddSection(new RulesetBindingsSection(ruleset));
-
-            AddInternal(new BackButton
-            {
-                Anchor = Anchor.BottomLeft,
-                Origin = Anchor.BottomLeft,
-                Action = Hide
-            });
-        }
-
-        public KeyBindingPanel()
-            : base(true)
-        {
-        }
-
-        private class BackButton : OsuClickableContainer, IKeyBindingHandler<GlobalAction>
-        {
-            private AspectContainer aspect;
-
-            [BackgroundDependencyLoader]
-            private void load()
-            {
-                Size = new Vector2(Sidebar.DEFAULT_WIDTH);
-                Children = new Drawable[]
-                {
-                    aspect = new AspectContainer
-                    {
-                        Anchor = Anchor.Centre,
-                        Origin = Anchor.Centre,
-                        RelativeSizeAxes = Axes.Y,
-                        Children = new Drawable[]
-                        {
-                            new SpriteIcon
-                            {
-                                Anchor = Anchor.Centre,
-                                Origin = Anchor.Centre,
-                                Y = -15,
-                                Size = new Vector2(15),
-                                Shadow = true,
-                                Icon = FontAwesome.Solid.ChevronLeft
-                            },
-                            new OsuSpriteText
-                            {
-                                Anchor = Anchor.Centre,
-                                Origin = Anchor.Centre,
-                                Y = 15,
-                                Font = OsuFont.GetFont(size: 12, weight: FontWeight.Bold),
-                                Text = @"back",
-                            },
-                        }
-                    }
-                };
-            }
-
-            protected override bool OnMouseDown(MouseDownEvent e)
-            {
-                aspect.ScaleTo(0.75f, 2000, Easing.OutQuint);
-                return base.OnMouseDown(e);
-            }
-
-            protected override bool OnMouseUp(MouseUpEvent e)
-            {
-                aspect.ScaleTo(1, 1000, Easing.OutElastic);
-                return base.OnMouseUp(e);
-            }
-
-            public bool OnPressed(GlobalAction action)
-            {
-                switch (action)
-                {
-                    case GlobalAction.Back:
-                        Click();
-                        return true;
-                }
-
-                return false;
-            }
-
-            public bool OnReleased(GlobalAction action) => false;
         }
     }
 }

osu.Game/Overlays/MedalOverlay.cs

@@ -145,7 +145,7 @@ namespace osu.Game.Overlays
         [BackgroundDependencyLoader]
         private void load(OsuColour colours, TextureStore textures, AudioManager audio)
         {
-            getSample = audio.Sample.Get(@"MedalSplash/medal-get");
+            getSample = audio.Samples.Get(@"MedalSplash/medal-get");
             innerSpin.Texture = outerSpin.Texture = textures.Get(@"MedalSplash/disc-spin");
 
             disc.EdgeEffect = leftStrip.EdgeEffect = rightStrip.EdgeEffect = new EdgeEffectParameters

osu.Game/Overlays/Mods/ModSelectOverlay.cs

@@ -56,8 +56,8 @@ namespace osu.Game.Overlays.Mods
             Ruleset.BindTo(ruleset);
             if (mods != null) SelectedMods.BindTo(mods);
 
-            sampleOn = audio.Sample.Get(@"UI/check-on");
+            sampleOn = audio.Samples.Get(@"UI/check-on");
-            sampleOff = audio.Sample.Get(@"UI/check-off");
+            sampleOff = audio.Samples.Get(@"UI/check-off");
         }
 
         protected override void LoadComplete()

osu.Game/Overlays/MusicController.cs

@@ -350,7 +350,7 @@ namespace osu.Game.Overlays
                     direction = last > next ? TransformDirection.Prev : TransformDirection.Next;
                 }
 
-                current.Track.Completed -= currentTrackCompleted;
+                //current.Track.Completed -= currentTrackCompleted;
             }
 
             current = beatmap.NewValue;

osu.Game/Overlays/Profile/Sections/Beatmaps/PaginatedBeatmapContainer.cs

@@ -29,13 +29,11 @@ namespace osu.Game.Overlays.Profile.Sections.Beatmaps
 
         protected override void ShowMore()
         {
-            base.ShowMore();
-
             request = new GetUserBeatmapsRequest(User.Value.Id, type, VisiblePages++ * ItemsPerPage);
             request.Success += sets => Schedule(() =>
             {
-                ShowMoreButton.FadeTo(sets.Count == ItemsPerPage ? 1 : 0);
+                MoreButton.FadeTo(sets.Count == ItemsPerPage ? 1 : 0);
-                ShowMoreLoading.Hide();
+                MoreButton.IsLoading = false;
 
                 if (!sets.Any() && VisiblePages == 1)
                 {

osu.Game/Overlays/Profile/Sections/Historical/PaginatedMostPlayedBeatmapContainer.cs

@@ -24,13 +24,11 @@ namespace osu.Game.Overlays.Profile.Sections.Historical
 
         protected override void ShowMore()
         {
-            base.ShowMore();
-
             request = new GetUserMostPlayedBeatmapsRequest(User.Value.Id, VisiblePages++ * ItemsPerPage);
             request.Success += beatmaps => Schedule(() =>
             {
-                ShowMoreButton.FadeTo(beatmaps.Count == ItemsPerPage ? 1 : 0);
+                MoreButton.FadeTo(beatmaps.Count == ItemsPerPage ? 1 : 0);
-                ShowMoreLoading.Hide();
+                MoreButton.IsLoading = false;
 
                 if (!beatmaps.Any() && VisiblePages == 1)
                 {

osu.Game/Overlays/Profile/Sections/Kudosu/KudosuInfo.cs

@@ -3,17 +3,15 @@
 
 using osu.Framework.Bindables;
 using osuTK;
-using osuTK.Graphics;
-using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
-using osu.Framework.Graphics.Effects;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Input.Events;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Containers;
 using osu.Game.Graphics.Sprites;
 using osu.Game.Users;
+using osu.Framework.Allocation;
 
 namespace osu.Game.Overlays.Profile.Sections.Kudosu
 {
@@ -24,46 +22,27 @@ namespace osu.Game.Overlays.Profile.Sections.Kudosu
         public KudosuInfo(Bindable<User> user)
         {
             this.user.BindTo(user);
-
             CountSection total;
             CountSection avaliable;
-
             RelativeSizeAxes = Axes.X;
             AutoSizeAxes = Axes.Y;
             Masking = true;
             CornerRadius = 3;
-            EdgeEffect = new EdgeEffectParameters
-            {
-                Type = EdgeEffectType.Shadow,
-                Offset = new Vector2(0f, 1f),
-                Radius = 3f,
-                Colour = Color4.Black.Opacity(0.2f),
-            };
             Children = new Drawable[]
             {
-                new Box
-                {
-                    RelativeSizeAxes = Axes.Both,
-                    Colour = OsuColour.Gray(0.2f)
-                },
                 new FillFlowContainer
                 {
                     RelativeSizeAxes = Axes.X,
                     AutoSizeAxes = Axes.Y,
+                    Direction = FillDirection.Horizontal,
+                    Spacing = new Vector2(5, 0),
                     Children = new[]
                     {
-                        total = new CountSection(
+                        total = new CountTotal(),
-                            "Total Kudosu Earned",
+                        avaliable = new CountAvailable()
-                            "Based on how much of a contribution the user has made to beatmap moderation. See this link for more information."
-                        ),
-                        avaliable = new CountSection(
-                            "Kudosu Avaliable",
-                            "Kudosu can be traded for kudosu stars, which will help your beatmap get more attention. This is the number of kudosu you haven't traded in yet."
-                        ),
                     }
                 }
             };
-
             this.user.ValueChanged += u =>
             {
                 total.Count = u.NewValue?.Kudosu.Total ?? 0;
@@ -73,21 +52,43 @@ namespace osu.Game.Overlays.Profile.Sections.Kudosu
 
         protected override bool OnClick(ClickEvent e) => true;
 
+        private class CountAvailable : CountSection
+        {
+            public CountAvailable()
+                : base("Kudosu Avaliable")
+            {
+                DescriptionText.Text = "Kudosu can be traded for kudosu stars, which will help your beatmap get more attention. This is the number of kudosu you haven't traded in yet.";
+            }
+        }
+
+        private class CountTotal : CountSection
+        {
+            public CountTotal()
+                : base("Total Kudosu Earned")
+            {
+                DescriptionText.AddText("Based on how much of a contribution the user has made to beatmap moderation. See ");
+                DescriptionText.AddLink("this link", "https://osu.ppy.sh/wiki/Kudosu");
+                DescriptionText.AddText(" for more information.");
+            }
+        }
+
         private class CountSection : Container
         {
             private readonly OsuSpriteText valueText;
+            protected readonly LinkFlowContainer DescriptionText;
+            private readonly Box lineBackground;
 
             public new int Count
             {
                 set => valueText.Text = value.ToString();
             }
 
-            public CountSection(string header, string description)
+            public CountSection(string header)
             {
                 RelativeSizeAxes = Axes.X;
                 Width = 0.5f;
                 AutoSizeAxes = Axes.Y;
-                Padding = new MarginPadding { Horizontal = 10, Top = 10, Bottom = 20 };
+                Padding = new MarginPadding { Top = 10, Bottom = 20 };
                 Child = new FillFlowContainer
                 {
                     AutoSizeAxes = Axes.Y,
@@ -96,39 +97,42 @@ namespace osu.Game.Overlays.Profile.Sections.Kudosu
                     Spacing = new Vector2(0, 5),
                     Children = new Drawable[]
                     {
-                        new FillFlowContainer
+                        new CircularContainer
                         {
-                            AutoSizeAxes = Axes.Both,
+                            Masking = true,
-                            Direction = FillDirection.Horizontal,
+                            RelativeSizeAxes = Axes.X,
-                            Spacing = new Vector2(5, 0),
+                            Height = 5,
-                            Children = new Drawable[]
+                            Child = lineBackground = new Box
                             {
-                                new OsuSpriteText
+                                RelativeSizeAxes = Axes.Both,
-                                {
-                                    Anchor = Anchor.BottomLeft,
-                                    Origin = Anchor.BottomLeft,
-                                    Text = header + ":",
-                                    Font = OsuFont.GetFont(size: 20, weight: FontWeight.Regular, italics: true)
-                                },
-                                valueText = new OsuSpriteText
-                                {
-                                    Anchor = Anchor.BottomLeft,
-                                    Origin = Anchor.BottomLeft,
-                                    Text = "0",
-                                    Font = OsuFont.GetFont(size: 40, weight: FontWeight.Regular, italics: true),
-                                    UseFullGlyphHeight = false,
-                                }
                             }
                         },
-                        new OsuTextFlowContainer(t => t.Font = t.Font.With(size: 19))
+                        new OsuSpriteText
+                        {
+                            Text = header,
+                            Font = OsuFont.GetFont(size: 12, weight: FontWeight.Bold)
+                        },
+                        valueText = new OsuSpriteText
+                        {
+                            Text = "0",
+                            Font = OsuFont.GetFont(size: 40, weight: FontWeight.Light),
+                            UseFullGlyphHeight = false,
+                        },
+                        DescriptionText = new LinkFlowContainer(t => t.Font = t.Font.With(size: 14))
                         {
                             RelativeSizeAxes = Axes.X,
                             AutoSizeAxes = Axes.Y,
-                            Text = description
                         }
                     }
                 };
             }
+
+            [BackgroundDependencyLoader]
+            private void load(OsuColour colours)
+            {
+                lineBackground.Colour = colours.Yellow;
+                DescriptionText.Colour = colours.GreySeafoamLighter;
+            }
         }
     }
 }

osu.Game/Overlays/Profile/Sections/PaginatedContainer.cs

@@ -7,20 +7,17 @@ using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Game.Graphics;
-using osu.Game.Graphics.Containers;
 using osu.Game.Graphics.Sprites;
-using osu.Game.Graphics.UserInterface;
 using osu.Game.Online.API;
 using osu.Game.Rulesets;
 using osu.Game.Users;
 
 namespace osu.Game.Overlays.Profile.Sections
 {
-    public class PaginatedContainer : FillFlowContainer
+    public abstract class PaginatedContainer : FillFlowContainer
     {
         protected readonly FillFlowContainer ItemsContainer;
-        protected readonly OsuHoverContainer ShowMoreButton;
+        protected readonly ShowMoreButton MoreButton;
-        protected readonly LoadingAnimation ShowMoreLoading;
         protected readonly OsuSpriteText MissingText;
 
         protected int VisiblePages;
@@ -32,7 +29,7 @@ namespace osu.Game.Overlays.Profile.Sections
         protected APIRequest RetrievalRequest;
         protected RulesetStore Rulesets;
 
-        public PaginatedContainer(Bindable<User> user, string header, string missing)
+        protected PaginatedContainer(Bindable<User> user, string header, string missing)
         {
             User.BindTo(user);
 
@@ -45,38 +42,27 @@ namespace osu.Game.Overlays.Profile.Sections
                 new OsuSpriteText
                 {
                     Text = header,
-                    Font = OsuFont.GetFont(size: 15, weight: FontWeight.Regular, italics: true),
+                    Font = OsuFont.GetFont(size: 20, weight: FontWeight.Bold),
                     Margin = new MarginPadding { Top = 10, Bottom = 10 },
                 },
                 ItemsContainer = new FillFlowContainer
                 {
                     AutoSizeAxes = Axes.Y,
                     RelativeSizeAxes = Axes.X,
-                    Margin = new MarginPadding { Bottom = 10 }
+                    Direction = FillDirection.Vertical,
+                    Spacing = new Vector2(0, 2),
                 },
-                ShowMoreButton = new OsuHoverContainer
+                MoreButton = new ShowMoreButton
                 {
+                    Anchor = Anchor.TopCentre,
+                    Origin = Anchor.TopCentre,
                     Alpha = 0,
+                    Margin = new MarginPadding { Top = 10 },
                     Action = ShowMore,
-                    AutoSizeAxes = Axes.Both,
-                    Anchor = Anchor.TopCentre,
-                    Origin = Anchor.TopCentre,
-                    Child = new OsuSpriteText
-                    {
-                        Font = OsuFont.GetFont(size: 14),
-                        Text = "show more",
-                        Padding = new MarginPadding { Vertical = 10, Horizontal = 15 },
-                    }
-                },
-                ShowMoreLoading = new LoadingAnimation
-                {
-                    Anchor = Anchor.TopCentre,
-                    Origin = Anchor.TopCentre,
-                    Size = new Vector2(14),
                 },
                 MissingText = new OsuSpriteText
                 {
-                    Font = OsuFont.GetFont(size: 14),
+                    Font = OsuFont.GetFont(size: 15),
                     Text = missing,
                     Alpha = 0,
                 },
@@ -97,16 +83,11 @@ namespace osu.Game.Overlays.Profile.Sections
         {
             VisiblePages = 0;
             ItemsContainer.Clear();
-            ShowMoreButton.Hide();
 
             if (e.NewValue != null)
                 ShowMore();
         }
 
-        protected virtual void ShowMore()
+        protected abstract void ShowMore();
-        {
-            ShowMoreLoading.Show();
-            ShowMoreButton.Hide();
-        }
     }
 }

osu.Game/Overlays/Profile/Sections/Ranks/PaginatedScoreContainer.cs

@@ -1,7 +1,6 @@
 // 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.Containers;
 using osu.Game.Online.API.Requests;
 using osu.Game.Users;
@@ -9,6 +8,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using osu.Framework.Bindables;
+using osu.Framework.Graphics;
 
 namespace osu.Game.Overlays.Profile.Sections.Ranks
 {
@@ -31,8 +31,6 @@ namespace osu.Game.Overlays.Profile.Sections.Ranks
 
         protected override void ShowMore()
         {
-            base.ShowMore();
-
             request = new GetUserScoresRequest(User.Value.Id, type, VisiblePages++ * ItemsPerPage);
             request.Success += scores => Schedule(() =>
             {
@@ -41,8 +39,8 @@ namespace osu.Game.Overlays.Profile.Sections.Ranks
 
                 if (!scores.Any() && VisiblePages == 1)
                 {
-                    ShowMoreButton.Hide();
+                    MoreButton.Hide();
-                    ShowMoreLoading.Hide();
+                    MoreButton.IsLoading = false;
                     MissingText.Show();
                     return;
                 }
@@ -63,8 +61,8 @@ namespace osu.Game.Overlays.Profile.Sections.Ranks
                 LoadComponentsAsync(drawableScores, s =>
                 {
                     MissingText.Hide();
-                    ShowMoreButton.FadeTo(scores.Count == ItemsPerPage ? 1 : 0);
+                    MoreButton.FadeTo(scores.Count == ItemsPerPage ? 1 : 0);
-                    ShowMoreLoading.Hide();
+                    MoreButton.IsLoading = false;
 
                     ItemsContainer.AddRange(s);
                 });

osu.Game/Overlays/Profile/Sections/Recent/PaginatedRecentActivityContainer.cs

@@ -22,13 +22,11 @@ namespace osu.Game.Overlays.Profile.Sections.Recent
 
         protected override void ShowMore()
         {
-            base.ShowMore();
-
             request = new GetUserRecentActivitiesRequest(User.Value.Id, VisiblePages++ * ItemsPerPage);
             request.Success += activities => Schedule(() =>
             {
-                ShowMoreButton.FadeTo(activities.Count == ItemsPerPage ? 1 : 0);
+                MoreButton.FadeTo(activities.Count == ItemsPerPage ? 1 : 0);
-                ShowMoreLoading.Hide();
+                MoreButton.IsLoading = false;
 
                 if (!activities.Any() && VisiblePages == 1)
                 {

osu.Game/Overlays/Profile/Sections/ShowMoreButton.cs

@@ -0,0 +1,146 @@
+// 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.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Input.Events;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Containers;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Graphics.UserInterface;
+using osuTK;
+using System.Collections.Generic;
+
+namespace osu.Game.Overlays.Profile.Sections
+{
+    public class ShowMoreButton : OsuHoverContainer
+    {
+        private const float fade_duration = 200;
+
+        private readonly Box background;
+        private readonly LoadingAnimation loading;
+        private readonly FillFlowContainer content;
+
+        protected override IEnumerable<Drawable> EffectTargets => new[] { background };
+
+        private bool isLoading;
+
+        public bool IsLoading
+        {
+            get => isLoading;
+            set
+            {
+                if (isLoading == value)
+                    return;
+
+                isLoading = value;
+
+                Enabled.Value = !isLoading;
+
+                if (value)
+                {
+                    loading.FadeIn(fade_duration, Easing.OutQuint);
+                    content.FadeOut(fade_duration, Easing.OutQuint);
+                }
+                else
+                {
+                    loading.FadeOut(fade_duration, Easing.OutQuint);
+                    content.FadeIn(fade_duration, Easing.OutQuint);
+                }
+            }
+        }
+
+        public ShowMoreButton()
+        {
+            AutoSizeAxes = Axes.Both;
+            Children = new Drawable[]
+            {
+                new CircularContainer
+                {
+                    Masking = true,
+                    Size = new Vector2(140, 30),
+                    Children = new Drawable[]
+                    {
+                        background = new Box
+                        {
+                            RelativeSizeAxes = Axes.Both,
+                        },
+                        content = new FillFlowContainer
+                        {
+                            Anchor = Anchor.Centre,
+                            Origin = Anchor.Centre,
+                            AutoSizeAxes = Axes.Both,
+                            Direction = FillDirection.Horizontal,
+                            Spacing = new Vector2(7),
+                            Children = new Drawable[]
+                            {
+                                new ChevronIcon(),
+                                new OsuSpriteText
+                                {
+                                    Anchor = Anchor.Centre,
+                                    Origin = Anchor.Centre,
+                                    Font = OsuFont.GetFont(size: 12, weight: FontWeight.Bold),
+                                    Text = "show more".ToUpper(),
+                                },
+                                new ChevronIcon(),
+                            }
+                        },
+                        loading = new LoadingAnimation
+                        {
+                            Anchor = Anchor.Centre,
+                            Origin = Anchor.Centre,
+                            Size = new Vector2(12)
+                        },
+                    }
+                }
+            };
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colors)
+        {
+            IdleColour = colors.GreySeafoamDark;
+            HoverColour = colors.GreySeafoam;
+        }
+
+        protected override bool OnClick(ClickEvent e)
+        {
+            if (!Enabled.Value)
+                return false;
+
+            try
+            {
+                return base.OnClick(e);
+            }
+            finally
+            {
+                // run afterwards as this will disable this button.
+                IsLoading = true;
+            }
+        }
+
+        private class ChevronIcon : SpriteIcon
+        {
+            private const int bottom_margin = 2;
+            private const int icon_size = 8;
+
+            public ChevronIcon()
+            {
+                Anchor = Anchor.Centre;
+                Origin = Anchor.Centre;
+                Margin = new MarginPadding { Bottom = bottom_margin };
+                Size = new Vector2(icon_size);
+                Icon = FontAwesome.Solid.ChevronDown;
+            }
+
+            [BackgroundDependencyLoader]
+            private void load(OsuColour colors)
+            {
+                Colour = colors.Yellow;
+            }
+        }
+    }
+}

osu.Game/Overlays/SettingsOverlay.cs

@@ -8,13 +8,12 @@ using osu.Game.Overlays.Settings;
 using osu.Game.Overlays.Settings.Sections;
 using osuTK.Graphics;
 using System.Collections.Generic;
+using System.Linq;
 
 namespace osu.Game.Overlays
 {
     public class SettingsOverlay : SettingsPanel
     {
-        private readonly KeyBindingPanel keyBindingPanel;
-
         protected override IEnumerable<SettingsSection> CreateSections() => new SettingsSection[]
         {
             new GeneralSection(),
@@ -22,29 +21,37 @@ namespace osu.Game.Overlays
             new GameplaySection(),
             new AudioSection(),
             new SkinSection(),
-            new InputSection(keyBindingPanel),
+            new InputSection(createSubPanel(new KeyBindingPanel())),
             new OnlineSection(),
             new MaintenanceSection(),
             new DebugSection(),
         };
 
+        private readonly List<SettingsSubPanel> subPanels = new List<SettingsSubPanel>();
+
         protected override Drawable CreateHeader() => new SettingsHeader("settings", "Change the way osu! behaves");
         protected override Drawable CreateFooter() => new SettingsFooter();
 
         public SettingsOverlay()
             : base(true)
         {
-            keyBindingPanel = new KeyBindingPanel
-            {
-                Depth = 1,
-                Anchor = Anchor.TopRight,
-            };
-            keyBindingPanel.StateChanged += keyBindingPanelStateChanged;
         }
 
-        public override bool AcceptsFocus => keyBindingPanel.State != Visibility.Visible;
+        public override bool AcceptsFocus => subPanels.All(s => s.State != Visibility.Visible);
 
-        private void keyBindingPanelStateChanged(Visibility visibility)
+        private T createSubPanel<T>(T subPanel)
+            where T : SettingsSubPanel
+        {
+            subPanel.Depth = 1;
+            subPanel.Anchor = Anchor.TopRight;
+            subPanel.StateChanged += subPanelStateChanged;
+
+            subPanels.Add(subPanel);
+
+            return subPanel;
+        }
+
+        private void subPanelStateChanged(Visibility visibility)
         {
             switch (visibility)
             {
@@ -66,12 +73,13 @@ namespace osu.Game.Overlays
             }
         }
 
-        protected override float ExpandedPosition => keyBindingPanel.State == Visibility.Visible ? -WIDTH : base.ExpandedPosition;
+        protected override float ExpandedPosition => subPanels.Any(s => s.State == Visibility.Visible) ? -WIDTH : base.ExpandedPosition;
 
         [BackgroundDependencyLoader]
         private void load()
         {
-            ContentContainer.Add(keyBindingPanel);
+            foreach (var s in subPanels)
+                ContentContainer.Add(s);
         }
     }
 }

osu.Game/Overlays/SettingsPanel.cs

@@ -28,8 +28,6 @@ namespace osu.Game.Overlays
 
         protected const float WIDTH = 400;
 
-        private const float sidebar_padding = 10;
-
         protected Container<Drawable> ContentContainer;
 
         protected override Container<Drawable> Content => ContentContainer;

osu.Game/Overlays/SettingsSubPanel.cs

@@ -0,0 +1,103 @@
+// 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.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Sprites;
+using osu.Framework.Input.Bindings;
+using osu.Framework.Input.Events;
+using osu.Game.Graphics;
+using osu.Game.Graphics.Containers;
+using osu.Game.Graphics.Sprites;
+using osu.Game.Input.Bindings;
+using osu.Game.Overlays.Settings;
+using osu.Game.Screens.Ranking;
+using osuTK;
+
+namespace osu.Game.Overlays
+{
+    public abstract class SettingsSubPanel : SettingsPanel
+    {
+        protected SettingsSubPanel()
+            : base(true)
+        {
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            AddInternal(new BackButton
+            {
+                Anchor = Anchor.BottomLeft,
+                Origin = Anchor.BottomLeft,
+                Action = Hide
+            });
+        }
+
+        private class BackButton : OsuClickableContainer, IKeyBindingHandler<GlobalAction>
+        {
+            private AspectContainer aspect;
+
+            [BackgroundDependencyLoader]
+            private void load()
+            {
+                Size = new Vector2(Sidebar.DEFAULT_WIDTH);
+                Children = new Drawable[]
+                {
+                    aspect = new AspectContainer
+                    {
+                        Anchor = Anchor.Centre,
+                        Origin = Anchor.Centre,
+                        RelativeSizeAxes = Axes.Y,
+                        Children = new Drawable[]
+                        {
+                            new SpriteIcon
+                            {
+                                Anchor = Anchor.Centre,
+                                Origin = Anchor.Centre,
+                                Y = -15,
+                                Size = new Vector2(15),
+                                Shadow = true,
+                                Icon = FontAwesome.Solid.ChevronLeft
+                            },
+                            new OsuSpriteText
+                            {
+                                Anchor = Anchor.Centre,
+                                Origin = Anchor.Centre,
+                                Y = 15,
+                                Font = OsuFont.GetFont(size: 12, weight: FontWeight.Bold),
+                                Text = @"back",
+                            },
+                        }
+                    }
+                };
+            }
+
+            protected override bool OnMouseDown(MouseDownEvent e)
+            {
+                aspect.ScaleTo(0.75f, 2000, Easing.OutQuint);
+                return base.OnMouseDown(e);
+            }
+
+            protected override bool OnMouseUp(MouseUpEvent e)
+            {
+                aspect.ScaleTo(1, 1000, Easing.OutElastic);
+                return base.OnMouseUp(e);
+            }
+
+            public bool OnPressed(GlobalAction action)
+            {
+                switch (action)
+                {
+                    case GlobalAction.Back:
+                        Click();
+                        return true;
+                }
+
+                return false;
+            }
+
+            public bool OnReleased(GlobalAction action) => false;
+        }
+    }
+}

osu.Game/Overlays/Toolbar/Toolbar.cs

@@ -69,6 +69,7 @@ namespace osu.Game.Overlays.Toolbar
                     AutoSizeAxes = Axes.X,
                     Children = new Drawable[]
                     {
+                        new ToolbarChangelogButton(),
                         new ToolbarDirectButton(),
                         new ToolbarChatButton(),
                         new ToolbarSocialButton(),

osu.Game/Overlays/Toolbar/ToolbarChangelogButton.cs

@@ -0,0 +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 osu.Framework.Allocation;
+using osu.Framework.Graphics.Sprites;
+
+namespace osu.Game.Overlays.Toolbar
+{
+    public class ToolbarChangelogButton : ToolbarOverlayToggleButton
+    {
+        public ToolbarChangelogButton()
+        {
+            SetIcon(FontAwesome.Solid.Bullhorn);
+        }
+
+        [BackgroundDependencyLoader(true)]
+        private void load(ChangelogOverlay changelog)
+        {
+            StateContainer = changelog;
+        }
+    }
+}

osu.Game/Screens/Menu/Button.cs

@@ -182,9 +182,9 @@ namespace osu.Game.Screens.Menu
         [BackgroundDependencyLoader]
         private void load(AudioManager audio)
         {
-            sampleHover = audio.Sample.Get(@"Menu/button-hover");
+            sampleHover = audio.Samples.Get(@"Menu/button-hover");
             if (!string.IsNullOrEmpty(sampleName))
-                sampleClick = audio.Sample.Get($@"Menu/{sampleName}");
+                sampleClick = audio.Samples.Get($@"Menu/{sampleName}");
         }
 
         protected override bool OnMouseDown(MouseDownEvent e)

osu.Game/Screens/Menu/ButtonSystem.cs

@@ -150,7 +150,7 @@ namespace osu.Game.Screens.Menu
 
             if (idleTracker != null) isIdle.BindTo(idleTracker.IsIdle);
 
-            sampleBack = audio.Sample.Get(@"Menu/button-back-select");
+            sampleBack = audio.Samples.Get(@"Menu/button-back-select");
         }
 
         private void onMulti()
@@ -176,7 +176,7 @@ namespace osu.Game.Screens.Menu
 
         private void updateIdleState(bool isIdle)
         {
-            if (isIdle && State != ButtonSystemState.Exit)
+            if (isIdle && State != ButtonSystemState.Exit && State != ButtonSystemState.EnteringMode)
                 State = ButtonSystemState.Initial;
         }
 

osu.Game/Screens/Menu/Intro.cs

@@ -76,8 +76,8 @@ namespace osu.Game.Screens.Menu
             introBeatmap = beatmaps.GetWorkingBeatmap(setInfo.Beatmaps[0]);
             track = introBeatmap.Track;
 
-            welcome = audio.Sample.Get(@"welcome");
+            welcome = audio.Samples.Get(@"welcome");
-            seeya = audio.Sample.Get(@"seeya");
+            seeya = audio.Samples.Get(@"seeya");
         }
 
         private const double delay_step_one = 2300;

osu.Game/Screens/Menu/OsuLogo.cs

@@ -255,8 +255,8 @@ namespace osu.Game.Screens.Menu
         [BackgroundDependencyLoader]
         private void load(TextureStore textures, AudioManager audio)
         {
-            sampleClick = audio.Sample.Get(@"Menu/osu-logo-select");
+            sampleClick = audio.Samples.Get(@"Menu/osu-logo-select");
-            sampleBeat = audio.Sample.Get(@"Menu/osu-logo-heartbeat");
+            sampleBeat = audio.Samples.Get(@"Menu/osu-logo-heartbeat");
 
             logo.Texture = textures.Get(@"Menu/logo");
             ripple.Texture = textures.Get(@"Menu/logo");

osu.Game/Screens/Multi/Match/Components/Header.cs

@@ -137,7 +137,7 @@ namespace osu.Game.Screens.Multi.Match.Components
 
             private class BackgroundSprite : UpdateableBeatmapBackgroundSprite
             {
-                protected override double FadeDuration => 200;
+                protected override double TransformDuration => 200;
             }
         }
     }

osu.Game/Screens/Multi/Multiplayer.cs

@@ -255,7 +255,7 @@ namespace osu.Game.Screens.Multi
 
                     if (!track.IsRunning)
                     {
-                        game.Audio.AddItemToList(track);
+                        game.Audio.AddItem(track);
                         track.Seek(Beatmap.Value.Metadata.PreviewTime);
                         track.Start();
                     }

osu.Game/Screens/OsuScreen.cs

@@ -99,7 +99,7 @@ namespace osu.Game.Screens
         [BackgroundDependencyLoader(true)]
         private void load(OsuGame osu, AudioManager audio)
         {
-            sampleExit = audio.Sample.Get(@"UI/screen-back");
+            sampleExit = audio.Samples.Get(@"UI/screen-back");
         }
 
         public virtual bool OnPressed(GlobalAction action)

osu.Game/Screens/Play/Player.cs

@@ -103,7 +103,7 @@ namespace osu.Game.Screens.Play
             if (working == null)
                 return;
 
-            sampleRestart = audio.Sample.Get(@"Gameplay/restart");
+            sampleRestart = audio.Samples.Get(@"Gameplay/restart");
 
             mouseWheelDisabled = config.GetBindable<bool>(OsuSetting.MouseDisableWheel);
             showStoryboard = config.GetBindable<bool>(OsuSetting.ShowStoryboard);

osu.Game/Screens/Play/SkipOverlay.cs

@@ -234,7 +234,7 @@ namespace osu.Game.Screens.Play
                 colourNormal = colours.Yellow;
                 colourHover = colours.YellowDark;
 
-                sampleConfirm = audio.Sample.Get(@"SongSelect/confirm-selection");
+                sampleConfirm = audio.Samples.Get(@"SongSelect/confirm-selection");
 
                 Children = new Drawable[]
                 {

osu.Game/Screens/Select/Carousel/DrawableCarouselItem.cs

@@ -69,7 +69,7 @@ namespace osu.Game.Screens.Select.Carousel
                 }
             };
 
-            sampleHover = audio.Sample.Get($@"SongSelect/song-ping-variation-{RNG.Next(1, 5)}");
+            sampleHover = audio.Samples.Get($@"SongSelect/song-ping-variation-{RNG.Next(1, 5)}");
             hoverLayer.Colour = colours.Blue.Opacity(0.1f);
         }
 

osu.Game/Screens/Select/SongSelect.cs

@@ -242,9 +242,9 @@ namespace osu.Game.Screens.Select
 
             dialogOverlay = dialog;
 
-            sampleChangeDifficulty = audio.Sample.Get(@"SongSelect/select-difficulty");
+            sampleChangeDifficulty = audio.Samples.Get(@"SongSelect/select-difficulty");
-            sampleChangeBeatmap = audio.Sample.Get(@"SongSelect/select-expand");
+            sampleChangeBeatmap = audio.Samples.Get(@"SongSelect/select-expand");
-            SampleConfirm = audio.Sample.Get(@"SongSelect/confirm-selection");
+            SampleConfirm = audio.Samples.Get(@"SongSelect/confirm-selection");
 
             Carousel.LoadBeatmapSetsFromManager(this.beatmaps);
 
@@ -580,9 +580,6 @@ namespace osu.Game.Screens.Select
 
             if (!track.IsRunning || restart)
             {
-                // Ensure the track is added to the TrackManager, since it is removed after the player finishes the map.
-                // Using AddItemToList rather than AddItem so that it doesn't attempt to register adjustment dependencies more than once.
-                Game.Audio.Track.AddItemToList(track);
                 track.RestartPoint = Beatmap.Value.Metadata.PreviewTime;
                 track.Restart();
             }