Merge branch 'master' into editor-timing-screen

Gemfile.lock

@@ -18,7 +18,7 @@ GEM
       unf (>= 0.0.5, < 1.0.0)
     dotenv (2.7.5)
     emoji_regex (1.0.1)
-    excon (0.66.0)
+    excon (0.67.0)
     faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
     faraday-cookie_jar (0.0.6)
@@ -27,7 +27,7 @@ GEM
     faraday_middleware (0.13.1)
       faraday (>= 0.7.4, < 1.0)
     fastimage (2.1.7)
-    fastlane (2.131.0)
+    fastlane (2.133.0)
       CFPropertyList (>= 2.3, < 4.0.0)
       addressable (>= 2.3, < 3.0.0)
       babosa (>= 1.0.2, < 2.0.0)
@@ -37,9 +37,9 @@ GEM
       dotenv (>= 2.1.1, < 3.0.0)
       emoji_regex (>= 0.1, < 2.0)
       excon (>= 0.45.0, < 1.0.0)
-      faraday (~> 0.9)
+      faraday (< 0.16.0)
       faraday-cookie_jar (~> 0.0.6)
-      faraday_middleware (~> 0.9)
+      faraday_middleware (< 0.16.0)
       fastimage (>= 2.1.0, < 3.0.0)
       gh_inspector (>= 1.1.2, < 2.0.0)
       google-api-client (>= 0.21.2, < 0.24.0)
@@ -52,7 +52,7 @@ GEM
       multipart-post (~> 2.0.0)
       plist (>= 3.1.0, < 4.0.0)
       public_suffix (~> 2.0.0)
-      rubyzip (>= 1.2.2, < 2.0.0)
+      rubyzip (>= 1.3.0, < 2.0.0)
       security (= 0.1.3)
       simctl (~> 1.6.3)
       slack-notifier (>= 2.0.0, < 3.0.0)
@@ -102,7 +102,7 @@ GEM
     memoist (0.16.0)
     mime-types (3.3)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2019.0904)
+    mime-types-data (3.2019.1009)
     mini_magick (4.9.5)
     mini_portile2 (2.4.0)
     multi_json (1.13.1)
@@ -121,9 +121,9 @@ GEM
       uber (< 0.2.0)
     retriable (3.1.2)
     rouge (2.0.7)
-    rubyzip (1.2.4)
+    rubyzip (1.3.0)
     security (0.1.3)
-    signet (0.11.0)
+    signet (0.12.0)
       addressable (~> 2.3)
       faraday (~> 0.9)
       jwt (>= 1.5, < 3.0)

build.ps1

@@ -1,4 +1,27 @@
+[CmdletBinding()]
+Param(
+    [string]$Target,
+    [string]$Configuration,
+    [ValidateSet("Quiet", "Minimal", "Normal", "Verbose", "Diagnostic")]
+    [string]$Verbosity,
+    [switch]$ShowDescription,
+    [Alias("WhatIf", "Noop")]
+    [switch]$DryRun,
+    [Parameter(Position = 0, Mandatory = $false, ValueFromRemainingArguments = $true)]
+    [string[]]$ScriptArgs
+)
+
+# Build Cake arguments
+$cakeArguments = "";
+if ($Target) { $cakeArguments += "-target=$Target" }
+if ($Configuration) { $cakeArguments += "-configuration=$Configuration" }
+if ($Verbosity) { $cakeArguments += "-verbosity=$Verbosity" }
+if ($ShowDescription) { $cakeArguments += "-showdescription" }
+if ($DryRun) { $cakeArguments += "-dryrun" }
+if ($Experimental) { $cakeArguments += "-experimental" }
+$cakeArguments += $ScriptArgs
+
 dotnet tool install Cake.Tool --global --version 0.35.0
 dotnet cake ./build/build.cake --bootstrap
-dotnet cake ./build/build.cake
+dotnet cake ./build/build.cake $cakeArguments
 exit $LASTEXITCODE

build.sh

@@ -1,3 +1,17 @@
+echo "Installing Cake.Tool..."
 dotnet tool install Cake.Tool --global --version 0.35.0
+
+# Parse arguments.
+CAKE_ARGUMENTS=()
+for i in "$@"; do
+    case $1 in
+        -s|--script) SCRIPT="$2"; shift ;;
+        --) shift; CAKE_ARGUMENTS+=("$@"); break ;;
+        *) CAKE_ARGUMENTS+=("$1") ;;
+    esac
+    shift
+done
+
+echo "Running build script..."
 dotnet cake ./build/build.cake --bootstrap
-dotnet cake ./build/build.cake
+dotnet cake ./build/build.cake "${CAKE_ARGUMENTS[@]}"

osu.Desktop/Overlays/VersionManager.cs

@@ -15,7 +15,7 @@ using osuTK.Graphics;
 
 namespace osu.Desktop.Overlays
 {
-    public class VersionManager : OverlayContainer
+    public class VersionManager : VisibilityContainer
     {
         [BackgroundDependencyLoader]
         private void load(OsuColour colours, TextureStore textures, OsuGameBase game)

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

@@ -49,10 +49,8 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
             if (Column == null)
                 return base.OnMouseDown(e);
 
-            HitObject.StartTime = TimeAt(e.ScreenSpaceMousePosition);
             HitObject.Column = Column.Index;
-
-            BeginPlacement();
+            BeginPlacement(TimeAt(e.ScreenSpaceMousePosition));
             return true;
         }
 

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

@@ -18,7 +18,7 @@ namespace osu.Game.Rulesets.Mania.Edit.Blueprints
         public Vector2 ScreenSpaceDragPosition { get; private set; }
         public Vector2 DragPosition { get; private set; }
 
-        protected new DrawableManiaHitObject HitObject => (DrawableManiaHitObject)base.HitObject;
+        public new DrawableManiaHitObject HitObject => (DrawableManiaHitObject)base.HitObject;
 
         protected IClock EditorClock { get; private set; }
 

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

@@ -3,9 +3,7 @@
 
 using System.Linq;
 using osu.Framework.Allocation;
-using osu.Framework.Input.Events;
 using osu.Framework.Timing;
-using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Mania.Edit.Blueprints;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.UI;
@@ -31,13 +29,16 @@ namespace osu.Game.Rulesets.Mania.Edit
             editorClock = clock;
         }
 
-        public override void HandleDrag(SelectionBlueprint blueprint, DragEvent dragEvent)
+        public override void HandleMovement(MoveSelectionEvent moveEvent)
         {
-            adjustOrigins((ManiaSelectionBlueprint)blueprint);
-            performDragMovement(dragEvent);
-            performColumnMovement(dragEvent);
+            var maniaBlueprint = (ManiaSelectionBlueprint)moveEvent.Blueprint;
+            int lastColumn = maniaBlueprint.HitObject.HitObject.Column;
 
-            base.HandleDrag(blueprint, dragEvent);
+            adjustOrigins(maniaBlueprint);
+            performDragMovement(moveEvent);
+            performColumnMovement(lastColumn, moveEvent);
+
+            base.HandleMovement(moveEvent);
         }
 
         /// <summary>
@@ -62,26 +63,29 @@ namespace osu.Game.Rulesets.Mania.Edit
                 b.HitObject.Y += movementDelta;
         }
 
-        private void performDragMovement(DragEvent dragEvent)
+        private void performDragMovement(MoveSelectionEvent moveEvent)
         {
+            float delta = moveEvent.InstantDelta.Y;
+
+            // When scrolling downwards the anchor position is at the bottom of the screen, however the movement event assumes the anchor is at the top of the screen.
+            // This causes the delta to assume a positive hitobject position, and which can be corrected for by subtracting the parent height.
+            if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
+                delta -= moveEvent.Blueprint.HitObject.Parent.DrawHeight;
+
             foreach (var b in SelectedBlueprints)
             {
                 var hitObject = b.HitObject;
-
                 var objectParent = (HitObjectContainer)hitObject.Parent;
 
-                // Using the hitobject position is required since AdjustPosition can be invoked multiple times per frame
-                // without the position having been updated by the parenting ScrollingHitObjectContainer
-                hitObject.Y += dragEvent.Delta.Y;
+                // StartTime could be used to adjust the position if only one movement event was received per frame.
+                // However this is not the case and ScrollingHitObjectContainer performs movement in UpdateAfterChildren() so the position must also be updated to be valid for further movement events
+                hitObject.Y += delta;
 
-                float targetPosition;
+                float targetPosition = hitObject.Position.Y;
 
-                // If we're scrolling downwards, a position of 0 is actually further away from the hit target
-                // so we need to flip the vertical coordinate in the hitobject container's space
+                // The scrolling algorithm always assumes an anchor at the top of the screen, so the position must be flipped when scrolling downwards to reflect a top anchor
                 if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
-                    targetPosition = -hitObject.Position.Y;
-                else
-                    targetPosition = hitObject.Position.Y;
+                    targetPosition = -targetPosition;
 
                 objectParent.Remove(hitObject);
 
@@ -94,14 +98,13 @@ namespace osu.Game.Rulesets.Mania.Edit
             }
         }
 
-        private void performColumnMovement(DragEvent dragEvent)
+        private void performColumnMovement(int lastColumn, MoveSelectionEvent moveEvent)
         {
-            var lastColumn = composer.ColumnAt(dragEvent.ScreenSpaceLastMousePosition);
-            var currentColumn = composer.ColumnAt(dragEvent.ScreenSpaceMousePosition);
-            if (lastColumn == null || currentColumn == null)
+            var currentColumn = composer.ColumnAt(moveEvent.ScreenSpacePosition);
+            if (currentColumn == null)
                 return;
 
-            int columnDelta = currentColumn.Index - lastColumn.Index;
+            int columnDelta = currentColumn.Index - lastColumn;
             if (columnDelta == 0)
                 return;
 

osu.Game.Rulesets.Osu.Tests/TestSceneOsuDistanceSnapGrid.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 NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Input.Events;
+using osu.Framework.MathUtils;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Osu.Beatmaps;
+using osu.Game.Rulesets.Osu.Edit;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Screens.Edit;
+using osu.Game.Tests.Visual;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestSceneOsuDistanceSnapGrid : ManualInputManagerTestScene
+    {
+        private const double beat_length = 100;
+        private static readonly Vector2 grid_position = new Vector2(512, 384);
+
+        [Cached(typeof(IEditorBeatmap))]
+        private readonly EditorBeatmap<OsuHitObject> editorBeatmap;
+
+        [Cached]
+        private readonly BindableBeatDivisor beatDivisor = new BindableBeatDivisor();
+
+        private TestOsuDistanceSnapGrid grid;
+
+        public TestSceneOsuDistanceSnapGrid()
+        {
+            editorBeatmap = new EditorBeatmap<OsuHitObject>(new OsuBeatmap());
+
+            createGrid();
+        }
+
+        [SetUp]
+        public void Setup() => Schedule(() =>
+        {
+            Clear();
+
+            editorBeatmap.BeatmapInfo.BaseDifficulty.SliderMultiplier = 1;
+            editorBeatmap.ControlPointInfo.DifficultyPoints.Clear();
+            editorBeatmap.ControlPointInfo.TimingPoints.Clear();
+            editorBeatmap.ControlPointInfo.TimingPoints.Add(new TimingControlPoint { BeatLength = beat_length });
+
+            beatDivisor.Value = 1;
+        });
+
+        [TestCase(1)]
+        [TestCase(2)]
+        [TestCase(3)]
+        [TestCase(4)]
+        [TestCase(6)]
+        [TestCase(8)]
+        [TestCase(12)]
+        [TestCase(16)]
+        public void TestBeatDivisor(int divisor)
+        {
+            AddStep($"set beat divisor = {divisor}", () => beatDivisor.Value = divisor);
+            createGrid();
+        }
+
+        [TestCase(100, 100)]
+        [TestCase(200, 100)]
+        public void TestBeatLength(float beatLength, float expectedSpacing)
+        {
+            AddStep($"set beat length = {beatLength}", () =>
+            {
+                editorBeatmap.ControlPointInfo.TimingPoints.Clear();
+                editorBeatmap.ControlPointInfo.TimingPoints.Add(new TimingControlPoint { BeatLength = beatLength });
+            });
+
+            createGrid();
+            AddAssert($"spacing = {expectedSpacing}", () => Precision.AlmostEquals(expectedSpacing, grid.DistanceSpacing));
+        }
+
+        [TestCase(0.5f, 50)]
+        [TestCase(1, 100)]
+        [TestCase(1.5f, 150)]
+        public void TestSpeedMultiplier(float multiplier, float expectedSpacing)
+        {
+            AddStep($"set speed multiplier = {multiplier}", () =>
+            {
+                editorBeatmap.ControlPointInfo.DifficultyPoints.Clear();
+                editorBeatmap.ControlPointInfo.DifficultyPoints.Add(new DifficultyControlPoint { SpeedMultiplier = multiplier });
+            });
+
+            createGrid();
+            AddAssert($"spacing = {expectedSpacing}", () => Precision.AlmostEquals(expectedSpacing, grid.DistanceSpacing));
+        }
+
+        [TestCase(0.5f, 50)]
+        [TestCase(1, 100)]
+        [TestCase(1.5f, 150)]
+        public void TestSliderMultiplier(float multiplier, float expectedSpacing)
+        {
+            AddStep($"set speed multiplier = {multiplier}", () => editorBeatmap.BeatmapInfo.BaseDifficulty.SliderMultiplier = multiplier);
+            createGrid();
+            AddAssert($"spacing = {expectedSpacing}", () => Precision.AlmostEquals(expectedSpacing, grid.DistanceSpacing));
+        }
+
+        [Test]
+        public void TestCursorInCentre()
+        {
+            createGrid();
+
+            AddStep("move mouse to centre", () => InputManager.MoveMouseTo(grid.ToScreenSpace(grid_position)));
+            assertSnappedDistance((float)beat_length);
+        }
+
+        [Test]
+        public void TestCursorBeforeMovementPoint()
+        {
+            createGrid();
+
+            AddStep("move mouse to just before movement point", () => InputManager.MoveMouseTo(grid.ToScreenSpace(grid_position + new Vector2((float)beat_length, 0) * 1.49f)));
+            assertSnappedDistance((float)beat_length);
+        }
+
+        [Test]
+        public void TestCursorAfterMovementPoint()
+        {
+            createGrid();
+
+            AddStep("move mouse to just after movement point", () => InputManager.MoveMouseTo(grid.ToScreenSpace(grid_position + new Vector2((float)beat_length, 0) * 1.51f)));
+            assertSnappedDistance((float)beat_length * 2);
+        }
+
+        private void assertSnappedDistance(float expectedDistance) => AddAssert($"snap distance = {expectedDistance}", () =>
+        {
+            Vector2 snappedPosition = grid.GetSnapPosition(grid.ToLocalSpace(InputManager.CurrentState.Mouse.Position));
+            float distance = Vector2.Distance(snappedPosition, grid_position);
+
+            return Precision.AlmostEquals(expectedDistance, distance);
+        });
+
+        private void createGrid()
+        {
+            AddStep("create grid", () =>
+            {
+                Children = new Drawable[]
+                {
+                    new Box
+                    {
+                        RelativeSizeAxes = Axes.Both,
+                        Colour = Color4.SlateGray
+                    },
+                    grid = new TestOsuDistanceSnapGrid(new HitCircle { Position = grid_position }),
+                    new SnappingCursorContainer { GetSnapPosition = v => grid.GetSnapPosition(grid.ToLocalSpace(v)) }
+                };
+            });
+        }
+
+        private class SnappingCursorContainer : CompositeDrawable
+        {
+            public Func<Vector2, Vector2> GetSnapPosition;
+
+            private readonly Drawable cursor;
+
+            public SnappingCursorContainer()
+            {
+                RelativeSizeAxes = Axes.Both;
+
+                InternalChild = cursor = new Circle
+                {
+                    Origin = Anchor.Centre,
+                    Size = new Vector2(50),
+                    Colour = Color4.Red
+                };
+            }
+
+            protected override void LoadComplete()
+            {
+                base.LoadComplete();
+
+                updatePosition(GetContainingInputManager().CurrentState.Mouse.Position);
+            }
+
+            protected override bool OnMouseMove(MouseMoveEvent e)
+            {
+                base.OnMouseMove(e);
+
+                updatePosition(e.ScreenSpaceMousePosition);
+                return true;
+            }
+
+            private void updatePosition(Vector2 screenSpacePosition)
+            {
+                cursor.Position = GetSnapPosition.Invoke(screenSpacePosition);
+            }
+        }
+
+        private class TestOsuDistanceSnapGrid : OsuDistanceSnapGrid
+        {
+            public new float DistanceSpacing => base.DistanceSpacing;
+
+            public TestOsuDistanceSnapGrid(OsuHitObject hitObject)
+                : base(hitObject)
+            {
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/Blueprints/HitCircles/HitCirclePlacementBlueprint.cs

@@ -30,7 +30,6 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.HitCircles
 
         protected override bool OnClick(ClickEvent e)
         {
-            HitObject.StartTime = EditorClock.CurrentTime;
             EndPlacement();
             return true;
         }

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

@@ -104,8 +104,6 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Sliders
         private void beginCurve()
         {
             BeginPlacement();
-
-            HitObject.StartTime = EditorClock.CurrentTime;
             setState(PlacementState.Body);
         }
 

osu.Game.Rulesets.Osu/Edit/Blueprints/Spinners/SpinnerPlacementBlueprint.cs

@@ -41,8 +41,6 @@ namespace osu.Game.Rulesets.Osu.Edit.Blueprints.Spinners
             }
             else
             {
-                HitObject.StartTime = EditorClock.CurrentTime;
-
                 isPlacingEnd = true;
                 piece.FadeTo(1f, 150, Easing.OutQuint);
 

osu.Game.Rulesets.Osu/Edit/OsuDistanceSnapGrid.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 osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Screens.Edit.Compose.Components;
+
+namespace osu.Game.Rulesets.Osu.Edit
+{
+    public class OsuDistanceSnapGrid : CircularDistanceSnapGrid
+    {
+        public OsuDistanceSnapGrid(OsuHitObject hitObject)
+            : base(hitObject, hitObject.StackedEndPosition)
+        {
+        }
+
+        protected override float GetVelocity(double time, ControlPointInfo controlPointInfo, BeatmapDifficulty difficulty)
+        {
+            TimingControlPoint timingPoint = controlPointInfo.TimingPointAt(time);
+            DifficultyControlPoint difficultyPoint = controlPointInfo.DifficultyPointAt(time);
+
+            double scoringDistance = OsuHitObject.BASE_SCORING_DISTANCE * difficulty.SliderMultiplier * difficultyPoint.SpeedMultiplier;
+
+            return (float)(scoringDistance / timingPoint.BeatLength);
+        }
+    }
+}

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

@@ -2,8 +2,6 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Linq;
-using osu.Framework.Input.Events;
-using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Screens.Edit.Compose.Components;
 
@@ -11,7 +9,7 @@ namespace osu.Game.Rulesets.Osu.Edit
 {
     public class OsuSelectionHandler : SelectionHandler
     {
-        public override void HandleDrag(SelectionBlueprint blueprint, DragEvent dragEvent)
+        public override void HandleMovement(MoveSelectionEvent moveEvent)
         {
             foreach (var h in SelectedHitObjects.OfType<OsuHitObject>())
             {
@@ -21,10 +19,10 @@ namespace osu.Game.Rulesets.Osu.Edit
                     continue;
                 }
 
-                h.Position += dragEvent.Delta;
+                h.Position += moveEvent.InstantDelta;
             }
 
-            base.HandleDrag(blueprint, dragEvent);
+            base.HandleMovement(moveEvent);
         }
     }
 }

osu.Game.Rulesets.Osu/Objects/OsuHitObject.cs

@@ -14,8 +14,16 @@ namespace osu.Game.Rulesets.Osu.Objects
 {
     public abstract class OsuHitObject : HitObject, IHasComboInformation, IHasPosition
     {
+        /// <summary>
+        /// The radius of hit objects (ie. the radius of a <see cref="HitCircle"/>).
+        /// </summary>
         public const float OBJECT_RADIUS = 64;
 
+        /// <summary>
+        /// Scoring distance with a speed-adjusted beat length of 1 second (ie. the speed slider balls move through their track).
+        /// </summary>
+        internal const float BASE_SCORING_DISTANCE = 100;
+
         public double TimePreempt = 600;
         public double TimeFadeIn = 400;
 

osu.Game.Rulesets.Osu/Objects/Slider.cs

@@ -19,11 +19,6 @@ namespace osu.Game.Rulesets.Osu.Objects
 {
     public class Slider : OsuHitObject, IHasCurve
     {
-        /// <summary>
-        /// Scoring distance with a speed-adjusted beat length of 1 second.
-        /// </summary>
-        private const float base_scoring_distance = 100;
-
         public double EndTime => StartTime + this.SpanCount() * Path.Distance / Velocity;
         public double Duration => EndTime - StartTime;
 
@@ -123,7 +118,7 @@ namespace osu.Game.Rulesets.Osu.Objects
             TimingControlPoint timingPoint = controlPointInfo.TimingPointAt(StartTime);
             DifficultyControlPoint difficultyPoint = controlPointInfo.DifficultyPointAt(StartTime);
 
-            double scoringDistance = base_scoring_distance * difficulty.SliderMultiplier * difficultyPoint.SpeedMultiplier;
+            double scoringDistance = BASE_SCORING_DISTANCE * difficulty.SliderMultiplier * difficultyPoint.SpeedMultiplier;
 
             Velocity = scoringDistance / timingPoint.BeatLength;
             TickDistance = scoringDistance / difficulty.SliderTickRate * TickDistanceMultiplier;

osu.Game.Tests/Beatmaps/IO/ImportBeatmapTest.cs

@@ -29,7 +29,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportWhenClosed()
         {
             //unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestImportWhenClosed"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportWhenClosed)))
             {
                 try
                 {
@@ -46,7 +46,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportThenDelete()
         {
             //unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestImportThenDelete"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenDelete)))
             {
                 try
                 {
@@ -67,7 +67,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportThenImport()
         {
             //unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestImportThenImport"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenImport)))
             {
                 try
                 {
@@ -94,7 +94,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportCorruptThenImport()
         {
             //unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestImportThenImport"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportCorruptThenImport)))
             {
                 try
                 {
@@ -136,7 +136,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestRollbackOnFailure()
         {
             //unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestRollbackOnFailure"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestRollbackOnFailure)))
             {
                 try
                 {
@@ -213,7 +213,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportThenImportDifferentHash()
         {
             //unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestImportThenImportDifferentHash"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenImportDifferentHash)))
             {
                 try
                 {
@@ -244,7 +244,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportThenDeleteThenImport()
         {
             //unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestImportThenDeleteThenImport"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportThenDeleteThenImport)))
             {
                 try
                 {
@@ -272,7 +272,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportThenDeleteThenImportWithOnlineIDMismatch(bool set)
         {
             //unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost($"TestImportThenDeleteThenImport-{set}"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost($"{nameof(TestImportThenDeleteThenImportWithOnlineIDMismatch)}-{set}"))
             {
                 try
                 {
@@ -306,7 +306,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         public async Task TestImportWithDuplicateBeatmapIDs()
         {
             //unfortunately for the time being we need to reference osu.Framework.Desktop for a game host here.
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestImportWithDuplicateBeatmapID"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportWithDuplicateBeatmapIDs)))
             {
                 try
                 {
@@ -392,7 +392,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         [Test]
         public async Task TestImportWhenFileOpen()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestImportWhenFileOpen"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportWhenFileOpen)))
             {
                 try
                 {
@@ -414,7 +414,7 @@ namespace osu.Game.Tests.Beatmaps.IO
         [Test]
         public async Task TestImportNestedStructure()
         {
-            using (HeadlessGameHost host = new CleanRunHeadlessGameHost("TestImportNestedStructure"))
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportNestedStructure)))
             {
                 try
                 {
@@ -456,9 +456,63 @@ namespace osu.Game.Tests.Beatmaps.IO
             }
         }
 
-        public static async Task<BeatmapSetInfo> LoadOszIntoOsu(OsuGameBase osu, string path = null)
+        [Test]
+        public async Task TestImportWithIgnoredDirectoryInArchive()
         {
-            var temp = path ?? TestResources.GetTestBeatmapForImport();
+            using (HeadlessGameHost host = new CleanRunHeadlessGameHost(nameof(TestImportWithIgnoredDirectoryInArchive)))
+            {
+                try
+                {
+                    var osu = loadOsu(host);
+
+                    var temp = TestResources.GetTestBeatmapForImport();
+
+                    string extractedFolder = $"{temp}_extracted";
+                    string dataFolder = Path.Combine(extractedFolder, "actual_data");
+                    string resourceForkFolder = Path.Combine(extractedFolder, "__MACOSX");
+                    string resourceForkFilePath = Path.Combine(resourceForkFolder, ".extracted");
+
+                    Directory.CreateDirectory(dataFolder);
+                    Directory.CreateDirectory(resourceForkFolder);
+
+                    using (var resourceForkFile = File.CreateText(resourceForkFilePath))
+                    {
+                        resourceForkFile.WriteLine("adding content so that it's not empty");
+                    }
+
+                    try
+                    {
+                        using (var zip = ZipArchive.Open(temp))
+                            zip.WriteToDirectory(dataFolder);
+
+                        using (var zip = ZipArchive.Create())
+                        {
+                            zip.AddAllFromDirectory(extractedFolder);
+                            zip.SaveTo(temp, new ZipWriterOptions(CompressionType.Deflate));
+                        }
+
+                        var imported = await osu.Dependencies.Get<BeatmapManager>().Import(temp);
+
+                        ensureLoaded(osu);
+
+                        Assert.IsFalse(imported.Files.Any(f => f.Filename.Contains("__MACOSX")), "Files contain resource fork folder, which should be ignored");
+                        Assert.IsFalse(imported.Files.Any(f => f.Filename.Contains("actual_data")), "Files contain common subfolder");
+                    }
+                    finally
+                    {
+                        Directory.Delete(extractedFolder, true);
+                    }
+                }
+                finally
+                {
+                    host.Exit();
+                }
+            }
+        }
+
+        public static async Task<BeatmapSetInfo> LoadOszIntoOsu(OsuGameBase osu, string path = null, bool virtualTrack = false)
+        {
+            var temp = path ?? TestResources.GetTestBeatmapForImport(virtualTrack);
 
             var manager = osu.Dependencies.Get<BeatmapManager>();
 

osu.Game.Tests/NonVisual/BeatmapSetInfoEqualityTest.cs

@@ -0,0 +1,48 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using NUnit.Framework;
+using osu.Game.Beatmaps;
+
+namespace osu.Game.Tests.NonVisual
+{
+    [TestFixture]
+    public class BeatmapSetInfoEqualityTest
+    {
+        [Test]
+        public void TestOnlineWithOnline()
+        {
+            var ourInfo = new BeatmapSetInfo { OnlineBeatmapSetID = 123 };
+            var otherInfo = new BeatmapSetInfo { OnlineBeatmapSetID = 123 };
+
+            Assert.AreEqual(ourInfo, otherInfo);
+        }
+
+        [Test]
+        public void TestDatabasedWithDatabased()
+        {
+            var ourInfo = new BeatmapSetInfo { ID = 123 };
+            var otherInfo = new BeatmapSetInfo { ID = 123 };
+
+            Assert.AreEqual(ourInfo, otherInfo);
+        }
+
+        [Test]
+        public void TestDatabasedWithOnline()
+        {
+            var ourInfo = new BeatmapSetInfo { ID = 123, OnlineBeatmapSetID = 12 };
+            var otherInfo = new BeatmapSetInfo { OnlineBeatmapSetID = 12 };
+
+            Assert.AreEqual(ourInfo, otherInfo);
+        }
+
+        [Test]
+        public void TestCheckNullID()
+        {
+            var ourInfo = new BeatmapSetInfo { Status = BeatmapSetOnlineStatus.Loved };
+            var otherInfo = new BeatmapSetInfo { Status = BeatmapSetOnlineStatus.Approved };
+
+            Assert.AreNotEqual(ourInfo, otherInfo);
+        }
+    }
+}

osu.Game.Tests/Resources/TestResources.cs

@@ -11,13 +11,13 @@ namespace osu.Game.Tests.Resources
     {
         public static Stream OpenResource(string name) => new DllResourceStore("osu.Game.Tests.dll").GetStream($"Resources/{name}");
 
-        public static Stream GetTestBeatmapStream() => new DllResourceStore("osu.Game.Resources.dll").GetStream("Beatmaps/241526 Soleily - Renatus.osz");
+        public static Stream GetTestBeatmapStream(bool virtualTrack = false) => new DllResourceStore("osu.Game.Resources.dll").GetStream($"Beatmaps/241526 Soleily - Renatus{(virtualTrack ? "_virtual" : "")}.osz");
 
-        public static string GetTestBeatmapForImport()
+        public static string GetTestBeatmapForImport(bool virtualTrack = false)
         {
             var temp = Path.GetTempFileName() + ".osz";
 
-            using (var stream = GetTestBeatmapStream())
+            using (var stream = GetTestBeatmapStream(virtualTrack))
             using (var newFile = File.Create(temp))
                 stream.CopyTo(newFile);
 

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

@@ -285,6 +285,12 @@ namespace osu.Game.Tests.Visual.Background
             });
         }
 
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+            rulesets?.Dispose();
+        }
+
         private class DummySongSelect : PlaySongSelect
         {
             protected override BackgroundScreen CreateBackground()

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

@@ -0,0 +1,213 @@
+// 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 NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.MathUtils;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Osu.Beatmaps;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Screens.Edit;
+using osu.Game.Screens.Edit.Compose.Components;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Tests.Visual.Editor
+{
+    public class TestSceneDistanceSnapGrid : EditorClockTestScene
+    {
+        private const double beat_length = 100;
+        private static readonly Vector2 grid_position = new Vector2(512, 384);
+
+        [Cached(typeof(IEditorBeatmap))]
+        private readonly EditorBeatmap<OsuHitObject> editorBeatmap;
+
+        private TestDistanceSnapGrid grid;
+
+        public TestSceneDistanceSnapGrid()
+        {
+            editorBeatmap = new EditorBeatmap<OsuHitObject>(new OsuBeatmap());
+            editorBeatmap.ControlPointInfo.TimingPoints.Add(new TimingControlPoint { BeatLength = beat_length });
+
+            createGrid();
+        }
+
+        [SetUp]
+        public void Setup() => Schedule(() =>
+        {
+            Clear();
+
+            editorBeatmap.ControlPointInfo.TimingPoints.Clear();
+            editorBeatmap.ControlPointInfo.TimingPoints.Add(new TimingControlPoint { BeatLength = beat_length });
+
+            BeatDivisor.Value = 1;
+        });
+
+        [TestCase(1)]
+        [TestCase(2)]
+        [TestCase(3)]
+        [TestCase(4)]
+        [TestCase(6)]
+        [TestCase(8)]
+        [TestCase(12)]
+        [TestCase(16)]
+        public void TestInitialBeatDivisor(int divisor)
+        {
+            AddStep($"set beat divisor = {divisor}", () => BeatDivisor.Value = divisor);
+            createGrid();
+
+            float expectedDistance = (float)beat_length / divisor;
+            AddAssert($"spacing is {expectedDistance}", () => Precision.AlmostEquals(grid.DistanceSpacing, expectedDistance));
+        }
+
+        [Test]
+        public void TestChangeBeatDivisor()
+        {
+            createGrid();
+            AddStep("set beat divisor = 2", () => BeatDivisor.Value = 2);
+
+            const float expected_distance = (float)beat_length / 2;
+            AddAssert($"spacing is {expected_distance}", () => Precision.AlmostEquals(grid.DistanceSpacing, expected_distance));
+        }
+
+        [TestCase(100)]
+        [TestCase(200)]
+        public void TestBeatLength(double beatLength)
+        {
+            AddStep($"set beat length = {beatLength}", () =>
+            {
+                editorBeatmap.ControlPointInfo.TimingPoints.Clear();
+                editorBeatmap.ControlPointInfo.TimingPoints.Add(new TimingControlPoint { BeatLength = beatLength });
+            });
+
+            createGrid();
+            AddAssert($"spacing is {beatLength}", () => Precision.AlmostEquals(grid.DistanceSpacing, beatLength));
+        }
+
+        [TestCase(1)]
+        [TestCase(2)]
+        public void TestGridVelocity(float velocity)
+        {
+            createGrid(g => g.Velocity = velocity);
+
+            float expectedDistance = (float)beat_length * velocity;
+            AddAssert($"spacing is {expectedDistance}", () => Precision.AlmostEquals(grid.DistanceSpacing, expectedDistance));
+        }
+
+        [Test]
+        public void TestGetSnappedTime()
+        {
+            createGrid();
+
+            Vector2 snapPosition = Vector2.Zero;
+            AddStep("get first tick position", () => snapPosition = grid_position + new Vector2((float)beat_length, 0));
+            AddAssert("snap time is 1 beat away", () => Precision.AlmostEquals(beat_length, grid.GetSnapTime(snapPosition), 0.01));
+
+            createGrid(g => g.Velocity = 2, "with velocity = 2");
+            AddAssert("snap time is now 0.5 beats away", () => Precision.AlmostEquals(beat_length / 2, grid.GetSnapTime(snapPosition), 0.01));
+        }
+
+        private void createGrid(Action<TestDistanceSnapGrid> func = null, string description = null)
+        {
+            AddStep($"create grid {description ?? string.Empty}", () =>
+            {
+                Children = new Drawable[]
+                {
+                    new Box
+                    {
+                        RelativeSizeAxes = Axes.Both,
+                        Colour = Color4.SlateGray
+                    },
+                    grid = new TestDistanceSnapGrid(new HitObject(), grid_position)
+                };
+
+                func?.Invoke(grid);
+            });
+        }
+
+        private class TestDistanceSnapGrid : DistanceSnapGrid
+        {
+            public new float Velocity = 1;
+
+            public new float DistanceSpacing => base.DistanceSpacing;
+
+            public TestDistanceSnapGrid(HitObject hitObject, Vector2 centrePosition)
+                : base(hitObject, centrePosition)
+            {
+            }
+
+            protected override void CreateContent(Vector2 centrePosition)
+            {
+                AddInternal(new Circle
+                {
+                    Origin = Anchor.Centre,
+                    Size = new Vector2(5),
+                    Position = centrePosition
+                });
+
+                int beatIndex = 0;
+
+                for (float s = centrePosition.X + DistanceSpacing; s <= DrawWidth; s += DistanceSpacing, beatIndex++)
+                {
+                    AddInternal(new Circle
+                    {
+                        Origin = Anchor.Centre,
+                        Size = new Vector2(5, 10),
+                        Position = new Vector2(s, centrePosition.Y),
+                        Colour = GetColourForBeatIndex(beatIndex)
+                    });
+                }
+
+                beatIndex = 0;
+
+                for (float s = centrePosition.X - DistanceSpacing; s >= 0; s -= DistanceSpacing, beatIndex++)
+                {
+                    AddInternal(new Circle
+                    {
+                        Origin = Anchor.Centre,
+                        Size = new Vector2(5, 10),
+                        Position = new Vector2(s, centrePosition.Y),
+                        Colour = GetColourForBeatIndex(beatIndex)
+                    });
+                }
+
+                beatIndex = 0;
+
+                for (float s = centrePosition.Y + DistanceSpacing; s <= DrawHeight; s += DistanceSpacing, beatIndex++)
+                {
+                    AddInternal(new Circle
+                    {
+                        Origin = Anchor.Centre,
+                        Size = new Vector2(10, 5),
+                        Position = new Vector2(centrePosition.X, s),
+                        Colour = GetColourForBeatIndex(beatIndex)
+                    });
+                }
+
+                beatIndex = 0;
+
+                for (float s = centrePosition.Y - DistanceSpacing; s >= 0; s -= DistanceSpacing, beatIndex++)
+                {
+                    AddInternal(new Circle
+                    {
+                        Origin = Anchor.Centre,
+                        Size = new Vector2(10, 5),
+                        Position = new Vector2(centrePosition.X, s),
+                        Colour = GetColourForBeatIndex(beatIndex)
+                    });
+                }
+            }
+
+            protected override float GetVelocity(double time, ControlPointInfo controlPointInfo, BeatmapDifficulty difficulty)
+                => Velocity;
+
+            public override Vector2 GetSnapPosition(Vector2 screenSpacePosition)
+                => Vector2.Zero;
+        }
+    }
+}

osu.Game.Tests/Visual/Menus/TestSceneScreenNavigation.cs

@@ -5,12 +5,15 @@ using System;
 using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
+using osu.Framework.Audio.Track;
+using osu.Framework.Bindables;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Platform;
 using osu.Framework.Screens;
 using osu.Framework.Testing;
+using osu.Game.Beatmaps;
 using osu.Game.Configuration;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Online.API;
@@ -18,7 +21,9 @@ using osu.Game.Overlays;
 using osu.Game.Overlays.Mods;
 using osu.Game.Screens;
 using osu.Game.Screens.Menu;
+using osu.Game.Screens.Play;
 using osu.Game.Screens.Select;
+using osu.Game.Tests.Beatmaps.IO;
 using osuTK;
 using osuTK.Graphics;
 using osuTK.Input;
@@ -31,11 +36,11 @@ namespace osu.Game.Tests.Visual.Menus
         private const float click_padding = 25;
 
         private GameHost host;
-        private TestOsuGame osuGame;
+        private TestOsuGame game;
 
-        private Vector2 backButtonPosition => osuGame.ToScreenSpace(new Vector2(click_padding, osuGame.LayoutRectangle.Bottom - click_padding));
+        private Vector2 backButtonPosition => game.ToScreenSpace(new Vector2(click_padding, game.LayoutRectangle.Bottom - click_padding));
 
-        private Vector2 optionsButtonPosition => osuGame.ToScreenSpace(new Vector2(click_padding, click_padding));
+        private Vector2 optionsButtonPosition => game.ToScreenSpace(new Vector2(click_padding, click_padding));
 
         [BackgroundDependencyLoader]
         private void load(GameHost host)
@@ -54,23 +59,23 @@ namespace osu.Game.Tests.Visual.Menus
         {
             AddStep("Create new game instance", () =>
             {
-                if (osuGame != null)
+                if (game != null)
                 {
-                    Remove(osuGame);
-                    osuGame.Dispose();
+                    Remove(game);
+                    game.Dispose();
                 }
 
-                osuGame = new TestOsuGame(LocalStorage, API);
-                osuGame.SetHost(host);
+                game = new TestOsuGame(LocalStorage, API);
+                game.SetHost(host);
 
                 // todo: this can be removed once we can run audio trakcs without a device present
                 // see https://github.com/ppy/osu/issues/1302
-                osuGame.LocalConfig.Set(OsuSetting.IntroSequence, IntroSequence.Circles);
+                game.LocalConfig.Set(OsuSetting.IntroSequence, IntroSequence.Circles);
 
-                Add(osuGame);
+                Add(game);
             });
-            AddUntilStep("Wait for load", () => osuGame.IsLoaded);
-            AddUntilStep("Wait for intro", () => osuGame.ScreenStack.CurrentScreen is IntroScreen);
+            AddUntilStep("Wait for load", () => game.IsLoaded);
+            AddUntilStep("Wait for intro", () => game.ScreenStack.CurrentScreen is IntroScreen);
             confirmAtMainMenu();
         }
 
@@ -82,11 +87,43 @@ namespace osu.Game.Tests.Visual.Menus
             pushAndConfirm(() => songSelect = new TestSongSelect());
             AddStep("Show mods overlay", () => songSelect.ModSelectOverlay.Show());
             AddAssert("Overlay was shown", () => songSelect.ModSelectOverlay.State.Value == Visibility.Visible);
-            AddStep("Press escape", () => pressAndRelease(Key.Escape));
+            pushEscape();
             AddAssert("Overlay was hidden", () => songSelect.ModSelectOverlay.State.Value == Visibility.Hidden);
             exitViaEscapeAndConfirm();
         }
 
+        [TestCase(true)]
+        [TestCase(false)]
+        public void TestSongContinuesAfterExitPlayer(bool withUserPause)
+        {
+            Player player = null;
+
+            WorkingBeatmap beatmap() => game.Beatmap.Value;
+            Track track() => beatmap().Track;
+
+            pushAndConfirm(() => new TestSongSelect());
+
+            AddStep("import beatmap", () => ImportBeatmapTest.LoadOszIntoOsu(game, virtualTrack: true).Wait());
+
+            AddUntilStep("wait for selected", () => !game.Beatmap.IsDefault);
+
+            if (withUserPause)
+                AddStep("pause", () => game.Dependencies.Get<MusicController>().Stop());
+
+            AddStep("press enter", () => pressAndRelease(Key.Enter));
+
+            AddUntilStep("wait for player", () => (player = game.ScreenStack.CurrentScreen as Player) != null);
+            AddUntilStep("wait for fail", () => player.HasFailed);
+
+            AddUntilStep("wait for track stop", () => !track().IsRunning);
+            AddAssert("Ensure time before preview point", () => track().CurrentTime < beatmap().Metadata.PreviewTime);
+
+            pushEscape();
+
+            AddUntilStep("wait for track playing", () => track().IsRunning);
+            AddAssert("Ensure time wasn't reset to preview point", () => track().CurrentTime < beatmap().Metadata.PreviewTime);
+        }
+
         [Test]
         public void TestExitSongSelectWithClick()
         {
@@ -98,7 +135,7 @@ namespace osu.Game.Tests.Visual.Menus
             AddStep("Move mouse to backButton", () => InputManager.MoveMouseTo(backButtonPosition));
 
             // BackButton handles hover using its child button, so this checks whether or not any of BackButton's children are hovered.
-            AddUntilStep("Back button is hovered", () => InputManager.HoveredDrawables.Any(d => d.Parent == osuGame.BackButton));
+            AddUntilStep("Back button is hovered", () => InputManager.HoveredDrawables.Any(d => d.Parent == game.BackButton));
 
             AddStep("Click back button", () => InputManager.Click(MouseButton.Left));
             AddUntilStep("Overlay was hidden", () => songSelect.ModSelectOverlay.State.Value == Visibility.Hidden);
@@ -122,25 +159,28 @@ namespace osu.Game.Tests.Visual.Menus
         [Test]
         public void TestOpenOptionsAndExitWithEscape()
         {
-            AddUntilStep("Wait for options to load", () => osuGame.Settings.IsLoaded);
+            AddUntilStep("Wait for options to load", () => game.Settings.IsLoaded);
             AddStep("Enter menu", () => pressAndRelease(Key.Enter));
             AddStep("Move mouse to options overlay", () => InputManager.MoveMouseTo(optionsButtonPosition));
             AddStep("Click options overlay", () => InputManager.Click(MouseButton.Left));
-            AddAssert("Options overlay was opened", () => osuGame.Settings.State.Value == Visibility.Visible);
+            AddAssert("Options overlay was opened", () => game.Settings.State.Value == Visibility.Visible);
             AddStep("Hide options overlay using escape", () => pressAndRelease(Key.Escape));
-            AddAssert("Options overlay was closed", () => osuGame.Settings.State.Value == Visibility.Hidden);
+            AddAssert("Options overlay was closed", () => game.Settings.State.Value == Visibility.Hidden);
         }
 
         private void pushAndConfirm(Func<Screen> newScreen)
         {
             Screen screen = null;
-            AddStep("Push new screen", () => osuGame.ScreenStack.Push(screen = newScreen()));
-            AddUntilStep("Wait for new screen", () => osuGame.ScreenStack.CurrentScreen == screen && screen.IsLoaded);
+            AddStep("Push new screen", () => game.ScreenStack.Push(screen = newScreen()));
+            AddUntilStep("Wait for new screen", () => game.ScreenStack.CurrentScreen == screen && screen.IsLoaded);
         }
 
+        private void pushEscape() =>
+            AddStep("Press escape", () => pressAndRelease(Key.Escape));
+
         private void exitViaEscapeAndConfirm()
         {
-            AddStep("Press escape", () => pressAndRelease(Key.Escape));
+            pushEscape();
             confirmAtMainMenu();
         }
 
@@ -151,7 +191,7 @@ namespace osu.Game.Tests.Visual.Menus
             confirmAtMainMenu();
         }
 
-        private void confirmAtMainMenu() => AddUntilStep("Wait for main menu", () => osuGame.ScreenStack.CurrentScreen is MainMenu menu && menu.IsLoaded);
+        private void confirmAtMainMenu() => AddUntilStep("Wait for main menu", () => game.ScreenStack.CurrentScreen is MainMenu menu && menu.IsLoaded);
 
         private void pressAndRelease(Key key)
         {
@@ -169,6 +209,8 @@ namespace osu.Game.Tests.Visual.Menus
 
             public new OsuConfigManager LocalConfig => base.LocalConfig;
 
+            public new Bindable<WorkingBeatmap> Beatmap => base.Beatmap;
+
             protected override Loader CreateLoader() => new TestLoader();
 
             public TestOsuGame(Storage storage, IAPIProvider api)

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

@@ -0,0 +1,58 @@
+// 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;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics;
+using osu.Game.Overlays.Comments;
+
+namespace osu.Game.Tests.Visual.Online
+{
+    [TestFixture]
+    public class TestSceneCommentsContainer : OsuTestScene
+    {
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(CommentsContainer),
+            typeof(CommentsHeader),
+            typeof(DrawableComment),
+            typeof(HeaderButton),
+            typeof(SortTabControl),
+            typeof(ShowChildrenButton),
+            typeof(DeletedChildrenPlaceholder)
+        };
+
+        protected override bool UseOnlineAPI => true;
+
+        public TestSceneCommentsContainer()
+        {
+            BasicScrollContainer scrollFlow;
+
+            Add(scrollFlow = new BasicScrollContainer
+            {
+                RelativeSizeAxes = Axes.Both,
+            });
+
+            AddStep("Big Black comments", () =>
+            {
+                scrollFlow.Clear();
+                scrollFlow.Add(new CommentsContainer(CommentableType.Beatmapset, 41823));
+            });
+
+            AddStep("Airman comments", () =>
+            {
+                scrollFlow.Clear();
+                scrollFlow.Add(new CommentsContainer(CommentableType.Beatmapset, 24313));
+            });
+
+            AddStep("lazer build comments", () =>
+            {
+                scrollFlow.Clear();
+                scrollFlow.Add(new CommentsContainer(CommentableType.Build, 4772));
+            });
+        }
+    }
+}

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

@@ -0,0 +1,39 @@
+// 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.Framework.Bindables;
+using osu.Game.Overlays.Comments;
+
+namespace osu.Game.Tests.Visual.Online
+{
+    [TestFixture]
+    public class TestSceneCommentsHeader : OsuTestScene
+    {
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(CommentsHeader),
+            typeof(HeaderButton),
+            typeof(SortTabControl),
+        };
+
+        private readonly Bindable<CommentsSortCriteria> sort = new Bindable<CommentsSortCriteria>();
+        private readonly BindableBool showDeleted = new BindableBool();
+
+        public TestSceneCommentsHeader()
+        {
+            Add(new CommentsHeader
+            {
+                Sort = { BindTarget = sort },
+                ShowDeleted = { BindTarget = showDeleted }
+            });
+
+            AddStep("Trigger ShowDeleted", () => showDeleted.Value = !showDeleted.Value);
+            AddStep("Select old", () => sort.Value = CommentsSortCriteria.Old);
+            AddStep("Select new", () => sort.Value = CommentsSortCriteria.New);
+            AddStep("Select top", () => sort.Value = CommentsSortCriteria.Top);
+        }
+    }
+}

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

@@ -1,10 +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.Overlays.Profile.Sections;
 using System;
 using System.Collections.Generic;
 using osu.Framework.Graphics;
+using osu.Game.Graphics.UserInterface;
+using osu.Framework.Allocation;
+using osu.Game.Graphics;
 
 namespace osu.Game.Tests.Visual.Online
 {
@@ -17,11 +19,11 @@ namespace osu.Game.Tests.Visual.Online
 
         public TestSceneShowMoreButton()
         {
-            ShowMoreButton button = null;
+            TestButton button = null;
 
             int fireCount = 0;
 
-            Add(button = new ShowMoreButton
+            Add(button = new TestButton
             {
                 Anchor = Anchor.Centre,
                 Origin = Anchor.Centre,
@@ -51,5 +53,16 @@ namespace osu.Game.Tests.Visual.Online
             AddAssert("action fired twice", () => fireCount == 2);
             AddAssert("is in loading state", () => button.IsLoading);
         }
+
+        private class TestButton : ShowMoreButton
+        {
+            [BackgroundDependencyLoader]
+            private void load(OsuColour colors)
+            {
+                IdleColour = colors.YellowDark;
+                HoverColour = colors.Yellow;
+                ChevronIconColour = colors.Red;
+            }
+        }
     }
 }

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

@@ -349,5 +349,11 @@ namespace osu.Game.Tests.Visual.SongSelect
                 DateAdded = DateTimeOffset.UtcNow,
             };
         }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+            rulesets?.Dispose();
+        }
     }
 }

osu.Game.Tournament/Screens/MapPool/MapPoolScreen.cs

@@ -196,7 +196,7 @@ namespace osu.Game.Tournament.Screens.MapPool
 
             setNextMode();
 
-            if (pickType == ChoiceType.Pick)
+            if (pickType == ChoiceType.Pick && currentMatch.Value.PicksBans.Any(i => i.Type == ChoiceType.Pick))
             {
                 scheduledChange?.Cancel();
                 scheduledChange = Scheduler.AddDelayed(() => { sceneManager?.SetScreen(typeof(GameplayScreen)); }, 10000);

osu.Game/Beatmaps/BeatmapSetInfo.cs

@@ -63,6 +63,21 @@ namespace osu.Game.Beatmaps
 
         public bool Protected { get; set; }
 
-        public bool Equals(BeatmapSetInfo other) => OnlineBeatmapSetID == other?.OnlineBeatmapSetID;
+        public bool Equals(BeatmapSetInfo other)
+        {
+            if (other == null)
+                return false;
+
+            if (ID != 0 && other.ID != 0)
+                return ID == other.ID;
+
+            if (OnlineBeatmapSetID.HasValue && other.OnlineBeatmapSetID.HasValue)
+                return OnlineBeatmapSetID == other.OnlineBeatmapSetID;
+
+            if (!string.IsNullOrEmpty(Hash) && !string.IsNullOrEmpty(other.Hash))
+                return Hash == other.Hash;
+
+            return ReferenceEquals(this, other);
+        }
     }
 }

osu.Game/Graphics/UserInterface/ShowMoreButton.cs

@@ -1,30 +1,36 @@
-// 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 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 osuTK.Graphics;
 using System.Collections.Generic;
 
-namespace osu.Game.Overlays.Profile.Sections
+namespace osu.Game.Graphics.UserInterface
 {
     public class ShowMoreButton : OsuHoverContainer
     {
         private const float fade_duration = 200;
 
-        private readonly Box background;
-        private readonly LoadingAnimation loading;
-        private readonly FillFlowContainer content;
+        private Color4 chevronIconColour;
 
-        protected override IEnumerable<Drawable> EffectTargets => new[] { background };
+        protected Color4 ChevronIconColour
+        {
+            get => chevronIconColour;
+            set => chevronIconColour = leftChevron.Colour = rightChevron.Colour = value;
+        }
+
+        public string Text
+        {
+            get => text.Text;
+            set => text.Text = value;
+        }
 
         private bool isLoading;
 
@@ -33,26 +39,32 @@ namespace osu.Game.Overlays.Profile.Sections
             get => isLoading;
             set
             {
-                if (isLoading == value)
-                    return;
-
                 isLoading = value;
 
                 Enabled.Value = !isLoading;
 
                 if (value)
                 {
-                    loading.FadeIn(fade_duration, Easing.OutQuint);
+                    loading.Show();
                     content.FadeOut(fade_duration, Easing.OutQuint);
                 }
                 else
                 {
-                    loading.FadeOut(fade_duration, Easing.OutQuint);
+                    loading.Hide();
                     content.FadeIn(fade_duration, Easing.OutQuint);
                 }
             }
         }
 
+        private readonly Box background;
+        private readonly LoadingAnimation loading;
+        private readonly FillFlowContainer content;
+        private readonly ChevronIcon leftChevron;
+        private readonly ChevronIcon rightChevron;
+        private readonly SpriteText text;
+
+        protected override IEnumerable<Drawable> EffectTargets => new[] { background };
+
         public ShowMoreButton()
         {
             AutoSizeAxes = Axes.Both;
@@ -77,15 +89,15 @@ namespace osu.Game.Overlays.Profile.Sections
                             Spacing = new Vector2(7),
                             Children = new Drawable[]
                             {
-                                new ChevronIcon(),
-                                new OsuSpriteText
+                                leftChevron = new ChevronIcon(),
+                                text = new OsuSpriteText
                                 {
                                     Anchor = Anchor.Centre,
                                     Origin = Anchor.Centre,
                                     Font = OsuFont.GetFont(size: 12, weight: FontWeight.Bold),
                                     Text = "show more".ToUpper(),
                                 },
-                                new ChevronIcon(),
+                                rightChevron = new ChevronIcon(),
                             }
                         },
                         loading = new LoadingAnimation
@@ -99,13 +111,6 @@ namespace osu.Game.Overlays.Profile.Sections
             };
         }
 
-        [BackgroundDependencyLoader]
-        private void load(OsuColour colors)
-        {
-            IdleColour = colors.GreySeafoamDark;
-            HoverColour = colors.GreySeafoam;
-        }
-
         protected override bool OnClick(ClickEvent e)
         {
             if (!Enabled.Value)
@@ -133,12 +138,6 @@ namespace osu.Game.Overlays.Profile.Sections
                 Size = new Vector2(icon_size);
                 Icon = FontAwesome.Solid.ChevronDown;
             }
-
-            [BackgroundDependencyLoader]
-            private void load(OsuColour colors)
-            {
-                Colour = colors.Yellow;
-            }
         }
     }
 }

osu.Game/IO/Archives/ZipArchiveReader.cs

@@ -1,15 +1,30 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using SharpCompress.Archives.Zip;
+using SharpCompress.Common;
 
 namespace osu.Game.IO.Archives
 {
     public sealed class ZipArchiveReader : ArchiveReader
     {
+        /// <summary>
+        /// List of substrings that indicate a file should be ignored during the import process
+        /// (usually due to representing no useful data and being autogenerated by the OS).
+        /// </summary>
+        private static readonly string[] filename_ignore_list =
+        {
+            // Mac-specific
+            "__MACOSX",
+            ".DS_Store",
+            // Windows-specific
+            "Thumbs.db"
+        };
+
         private readonly Stream archiveStream;
         private readonly ZipArchive archive;
 
@@ -43,7 +58,9 @@ namespace osu.Game.IO.Archives
             archiveStream.Dispose();
         }
 
-        public override IEnumerable<string> Filenames => archive.Entries.Select(e => e.Key).ToArray();
+        private static bool canBeIgnored(IEntry entry) => filename_ignore_list.Any(ignoredName => entry.Key.IndexOf(ignoredName, StringComparison.OrdinalIgnoreCase) >= 0);
+
+        public override IEnumerable<string> Filenames => archive.Entries.Where(e => !canBeIgnored(e)).Select(e => e.Key).ToArray();
 
         public override Stream GetUnderlyingStream() => archiveStream;
     }

osu.Game/Online/API/Requests/GetCommentsRequest.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 osu.Framework.IO.Network;
+using Humanizer;
+using osu.Game.Online.API.Requests.Responses;
+using osu.Game.Overlays.Comments;
+
+namespace osu.Game.Online.API.Requests
+{
+    public class GetCommentsRequest : APIRequest<CommentBundle>
+    {
+        private readonly long id;
+        private readonly int page;
+        private readonly CommentableType type;
+        private readonly CommentsSortCriteria sort;
+
+        public GetCommentsRequest(CommentableType type, long id, CommentsSortCriteria sort = CommentsSortCriteria.New, int page = 1)
+        {
+            this.type = type;
+            this.sort = sort;
+            this.id = id;
+            this.page = page;
+        }
+
+        protected override WebRequest CreateWebRequest()
+        {
+            var req = base.CreateWebRequest();
+
+            req.AddParameter("commentable_type", type.ToString().Underscore().ToLowerInvariant());
+            req.AddParameter("commentable_id", id.ToString());
+            req.AddParameter("sort", sort.ToString().ToLowerInvariant());
+            req.AddParameter("page", page.ToString());
+
+            return req;
+        }
+
+        protected override string Target => "comments";
+    }
+
+    public enum CommentableType
+    {
+        Build,
+        Beatmapset,
+        NewsPost
+    }
+}

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

@@ -1,12 +1,9 @@
 // Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
 // See the LICENCE file in the repository root for full licence text.
 
-using System.Collections.Generic;
-using osu.Game.Online.API.Requests.Responses;
-
 namespace osu.Game.Online.API.Requests
 {
-    public class GetUsersRequest : APIRequest<List<APIUser>>
+    public class GetUsersRequest : APIRequest<GetUsersResponse>
     {
         protected override string Target => @"rankings/osu/performance";
     }

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

@@ -0,0 +1,15 @@
+// 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;
+using osu.Game.Online.API.Requests.Responses;
+
+namespace osu.Game.Online.API.Requests
+{
+    public class GetUsersResponse : ResponseWithCursor
+    {
+        [JsonProperty("ranking")]
+        public List<APIUser> Users;
+    }
+}

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

@@ -0,0 +1,16 @@
+// 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
+{
+    public abstract class ResponseWithCursor
+    {
+        /// <summary>
+        /// A collection of parameters which should be passed to the search endpoint to fetch the next page.
+        /// </summary>
+        [JsonProperty("cursor")]
+        public dynamic CursorJson;
+    }
+}

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

@@ -0,0 +1,79 @@
+// 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 osu.Game.Users;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text.RegularExpressions;
+
+namespace osu.Game.Online.API.Requests.Responses
+{
+    public class Comment
+    {
+        [JsonProperty(@"id")]
+        public long Id { get; set; }
+
+        [JsonProperty(@"parent_id")]
+        public long? ParentId { get; set; }
+
+        public readonly List<Comment> ChildComments = new List<Comment>();
+
+        public Comment ParentComment { get; set; }
+
+        [JsonProperty(@"user_id")]
+        public long? UserId { get; set; }
+
+        public User User { get; set; }
+
+        [JsonProperty(@"message")]
+        public string Message { get; set; }
+
+        [JsonProperty(@"message_html")]
+        public string MessageHtml { get; set; }
+
+        [JsonProperty(@"replies_count")]
+        public int RepliesCount { get; set; }
+
+        [JsonProperty(@"votes_count")]
+        public int VotesCount { get; set; }
+
+        [JsonProperty(@"commenatble_type")]
+        public string CommentableType { get; set; }
+
+        [JsonProperty(@"commentable_id")]
+        public int CommentableId { get; set; }
+
+        [JsonProperty(@"legacy_name")]
+        public string LegacyName { get; set; }
+
+        [JsonProperty(@"created_at")]
+        public DateTimeOffset CreatedAt { get; set; }
+
+        [JsonProperty(@"updated_at")]
+        public DateTimeOffset? UpdatedAt { get; set; }
+
+        [JsonProperty(@"deleted_at")]
+        public DateTimeOffset? DeletedAt { get; set; }
+
+        [JsonProperty(@"edited_at")]
+        public DateTimeOffset? EditedAt { get; set; }
+
+        [JsonProperty(@"edited_by_id")]
+        public long? EditedById { get; set; }
+
+        public User EditedUser { get; set; }
+
+        public bool IsTopLevel => !ParentId.HasValue;
+
+        public bool IsDeleted => DeletedAt.HasValue;
+
+        public bool HasMessage => !string.IsNullOrEmpty(MessageHtml);
+
+        public string GetMessage => HasMessage ? WebUtility.HtmlDecode(Regex.Replace(MessageHtml, @"<(.|\n)*?>", string.Empty)) : string.Empty;
+
+        public int DeletedChildrenCount => ChildComments.Count(c => c.IsDeleted);
+    }
+}

osu.Game/Online/API/Requests/Responses/CommentBundle.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 Newtonsoft.Json;
+using osu.Game.Users;
+using System.Collections.Generic;
+
+namespace osu.Game.Online.API.Requests.Responses
+{
+    public class CommentBundle
+    {
+        private List<Comment> comments;
+
+        [JsonProperty(@"comments")]
+        public List<Comment> Comments
+        {
+            get => comments;
+            set
+            {
+                comments = value;
+                comments.ForEach(child =>
+                {
+                    if (child.ParentId != null)
+                    {
+                        comments.ForEach(parent =>
+                        {
+                            if (parent.Id == child.ParentId)
+                            {
+                                parent.ChildComments.Add(child);
+                                child.ParentComment = parent;
+                            }
+                        });
+                    }
+                });
+            }
+        }
+
+        [JsonProperty(@"has_more")]
+        public bool HasMore { get; set; }
+
+        [JsonProperty(@"has_more_id")]
+        public long? HasMoreId { get; set; }
+
+        [JsonProperty(@"user_follow")]
+        public bool UserFollow { get; set; }
+
+        [JsonProperty(@"included_comments")]
+        public List<Comment> IncludedComments { get; set; }
+
+        private List<User> users;
+
+        [JsonProperty(@"users")]
+        public List<User> Users
+        {
+            get => users;
+            set
+            {
+                users = value;
+
+                value.ForEach(u =>
+                {
+                    Comments.ForEach(c =>
+                    {
+                        if (c.UserId == u.Id)
+                            c.User = u;
+
+                        if (c.EditedById == u.Id)
+                            c.EditedUser = u;
+                    });
+                });
+            }
+        }
+
+        [JsonProperty(@"total")]
+        public int Total { get; set; }
+
+        [JsonProperty(@"top_level_count")]
+        public int TopLevelCount { get; set; }
+    }
+}

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

@@ -2,19 +2,12 @@
 // See the LICENCE file in the repository root for full licence text.
 
 using System.Collections.Generic;
-using Newtonsoft.Json;
 using osu.Game.Online.API.Requests.Responses;
 
 namespace osu.Game.Online.API.Requests
 {
-    public class SearchBeatmapSetsResponse
+    public class SearchBeatmapSetsResponse : ResponseWithCursor
     {
         public IEnumerable<APIBeatmapSet> BeatmapSets;
-
-        /// <summary>
-        /// A collection of parameters which should be passed to the search endpoint to fetch the next page.
-        /// </summary>
-        [JsonProperty("cursor")]
-        public dynamic CursorJson;
     }
 }

osu.Game/OsuGame.cs

@@ -102,7 +102,7 @@ namespace osu.Game
 
         private readonly List<OverlayContainer> overlays = new List<OverlayContainer>();
 
-        private readonly List<OverlayContainer> toolbarElements = new List<OverlayContainer>();
+        private readonly List<VisibilityContainer> toolbarElements = new List<VisibilityContainer>();
 
         private readonly List<OverlayContainer> visibleBlockingOverlays = new List<OverlayContainer>();
 

osu.Game/OsuGameBase.cs

@@ -298,6 +298,12 @@ namespace osu.Game
 
         public string[] HandledExtensions => fileImporters.SelectMany(i => i.HandledExtensions).ToArray();
 
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+            RulesetStore?.Dispose();
+        }
+
         private class OsuUserInputManager : UserInputManager
         {
             protected override MouseButtonEventManager CreateButtonManagerFor(MouseButton button)

osu.Game/Overlays/Comments/CommentsContainer.cs

@@ -0,0 +1,197 @@
+// 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.Containers;
+using osu.Game.Online.API;
+using osu.Game.Online.API.Requests;
+using osu.Framework.Graphics;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics;
+using osu.Game.Online.API.Requests.Responses;
+using System.Threading;
+using System.Linq;
+using osu.Framework.Extensions.IEnumerableExtensions;
+
+namespace osu.Game.Overlays.Comments
+{
+    public class CommentsContainer : CompositeDrawable
+    {
+        private readonly CommentableType type;
+        private readonly long id;
+
+        public readonly Bindable<CommentsSortCriteria> Sort = new Bindable<CommentsSortCriteria>();
+        public readonly BindableBool ShowDeleted = new BindableBool();
+
+        [Resolved]
+        private IAPIProvider api { get; set; }
+
+        [Resolved]
+        private OsuColour colours { get; set; }
+
+        private GetCommentsRequest request;
+        private CancellationTokenSource loadCancellation;
+        private int currentPage;
+
+        private readonly Box background;
+        private readonly FillFlowContainer content;
+        private readonly DeletedChildrenPlaceholder deletedChildrenPlaceholder;
+        private readonly CommentsShowMoreButton moreButton;
+
+        public CommentsContainer(CommentableType type, long id)
+        {
+            this.type = type;
+            this.id = id;
+
+            RelativeSizeAxes = Axes.X;
+            AutoSizeAxes = Axes.Y;
+            AddRangeInternal(new Drawable[]
+            {
+                background = new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                },
+                new FillFlowContainer
+                {
+                    RelativeSizeAxes = Axes.X,
+                    AutoSizeAxes = Axes.Y,
+                    Direction = FillDirection.Vertical,
+                    Children = new Drawable[]
+                    {
+                        new CommentsHeader
+                        {
+                            Sort = { BindTarget = Sort },
+                            ShowDeleted = { BindTarget = ShowDeleted }
+                        },
+                        content = new FillFlowContainer
+                        {
+                            RelativeSizeAxes = Axes.X,
+                            AutoSizeAxes = Axes.Y,
+                            Direction = FillDirection.Vertical,
+                        },
+                        new Container
+                        {
+                            RelativeSizeAxes = Axes.X,
+                            AutoSizeAxes = Axes.Y,
+                            Children = new Drawable[]
+                            {
+                                new Box
+                                {
+                                    RelativeSizeAxes = Axes.Both,
+                                    Colour = OsuColour.Gray(0.2f)
+                                },
+                                new FillFlowContainer
+                                {
+                                    RelativeSizeAxes = Axes.X,
+                                    AutoSizeAxes = Axes.Y,
+                                    Direction = FillDirection.Vertical,
+                                    Children = new Drawable[]
+                                    {
+                                        deletedChildrenPlaceholder = new DeletedChildrenPlaceholder
+                                        {
+                                            ShowDeleted = { BindTarget = ShowDeleted }
+                                        },
+                                        new Container
+                                        {
+                                            AutoSizeAxes = Axes.Y,
+                                            RelativeSizeAxes = Axes.X,
+                                            Child = moreButton = new CommentsShowMoreButton
+                                            {
+                                                Anchor = Anchor.Centre,
+                                                Origin = Anchor.Centre,
+                                                Margin = new MarginPadding(5),
+                                                Action = getComments
+                                            }
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            });
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            background.Colour = colours.Gray2;
+        }
+
+        protected override void LoadComplete()
+        {
+            Sort.BindValueChanged(onSortChanged, true);
+            base.LoadComplete();
+        }
+
+        private void onSortChanged(ValueChangedEvent<CommentsSortCriteria> sort)
+        {
+            clearComments();
+            getComments();
+        }
+
+        private void getComments()
+        {
+            request?.Cancel();
+            loadCancellation?.Cancel();
+            request = new GetCommentsRequest(type, id, Sort.Value, currentPage++);
+            request.Success += onSuccess;
+            api.Queue(request);
+        }
+
+        private void clearComments()
+        {
+            currentPage = 1;
+            deletedChildrenPlaceholder.DeletedCount.Value = 0;
+            moreButton.IsLoading = true;
+            content.Clear();
+        }
+
+        private void onSuccess(CommentBundle response)
+        {
+            loadCancellation = new CancellationTokenSource();
+
+            FillFlowContainer page = new FillFlowContainer
+            {
+                RelativeSizeAxes = Axes.X,
+                AutoSizeAxes = Axes.Y,
+                Direction = FillDirection.Vertical,
+            };
+
+            foreach (var c in response.Comments)
+            {
+                if (c.IsTopLevel)
+                    page.Add(new DrawableComment(c)
+                    {
+                        ShowDeleted = { BindTarget = ShowDeleted }
+                    });
+            }
+
+            LoadComponentAsync(page, loaded =>
+            {
+                content.Add(loaded);
+
+                deletedChildrenPlaceholder.DeletedCount.Value += response.Comments.Count(c => c.IsDeleted && c.IsTopLevel);
+
+                if (response.HasMore)
+                {
+                    int loadedTopLevelComments = 0;
+                    content.Children.OfType<FillFlowContainer>().ForEach(p => loadedTopLevelComments += p.Children.OfType<DrawableComment>().Count());
+
+                    moreButton.Current.Value = response.TopLevelCount - loadedTopLevelComments;
+                    moreButton.IsLoading = false;
+                }
+
+                moreButton.FadeTo(response.HasMore ? 1 : 0);
+            }, loadCancellation.Token);
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            request?.Cancel();
+            loadCancellation?.Cancel();
+            base.Dispose(isDisposing);
+        }
+    }
+}

osu.Game/Overlays/Comments/CommentsHeader.cs

@@ -0,0 +1,128 @@
+// 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.Containers;
+using osu.Framework.Graphics;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics;
+using osu.Framework.Graphics.Sprites;
+using osuTK;
+using osu.Framework.Input.Events;
+
+namespace osu.Game.Overlays.Comments
+{
+    public class CommentsHeader : CompositeDrawable
+    {
+        private const int font_size = 14;
+
+        public readonly Bindable<CommentsSortCriteria> Sort = new Bindable<CommentsSortCriteria>();
+        public readonly BindableBool ShowDeleted = new BindableBool();
+
+        private readonly Box background;
+
+        public CommentsHeader()
+        {
+            RelativeSizeAxes = Axes.X;
+            Height = 40;
+
+            AddRangeInternal(new Drawable[]
+            {
+                background = new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                },
+                new Container
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Padding = new MarginPadding { Horizontal = 50 },
+                    Children = new Drawable[]
+                    {
+                        new FillFlowContainer
+                        {
+                            AutoSizeAxes = Axes.Both,
+                            Direction = FillDirection.Horizontal,
+                            Spacing = new Vector2(10, 0),
+                            Anchor = Anchor.CentreLeft,
+                            Origin = Anchor.CentreLeft,
+                            Children = new Drawable[]
+                            {
+                                new SpriteText
+                                {
+                                    Anchor = Anchor.CentreLeft,
+                                    Origin = Anchor.CentreLeft,
+                                    Font = OsuFont.GetFont(size: font_size),
+                                    Text = @"Sort by"
+                                },
+                                new SortTabControl
+                                {
+                                    Anchor = Anchor.CentreLeft,
+                                    Origin = Anchor.CentreLeft,
+                                    Current = Sort
+                                }
+                            }
+                        },
+                        new ShowDeletedButton
+                        {
+                            Anchor = Anchor.CentreRight,
+                            Origin = Anchor.CentreRight,
+                            Checked = { BindTarget = ShowDeleted }
+                        }
+                    }
+                }
+            });
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            background.Colour = colours.Gray3;
+        }
+
+        private class ShowDeletedButton : HeaderButton
+        {
+            public readonly BindableBool Checked = new BindableBool();
+
+            private readonly SpriteIcon checkboxIcon;
+
+            public ShowDeletedButton()
+            {
+                Add(new FillFlowContainer
+                {
+                    AutoSizeAxes = Axes.Both,
+                    Direction = FillDirection.Horizontal,
+                    Spacing = new Vector2(5, 0),
+                    Children = new Drawable[]
+                    {
+                        checkboxIcon = new SpriteIcon
+                        {
+                            Anchor = Anchor.CentreLeft,
+                            Origin = Anchor.CentreLeft,
+                            Size = new Vector2(10),
+                        },
+                        new SpriteText
+                        {
+                            Anchor = Anchor.CentreLeft,
+                            Origin = Anchor.CentreLeft,
+                            Font = OsuFont.GetFont(size: font_size),
+                            Text = @"Show deleted"
+                        }
+                    },
+                });
+            }
+
+            protected override void LoadComplete()
+            {
+                Checked.BindValueChanged(isChecked => checkboxIcon.Icon = isChecked.NewValue ? FontAwesome.Solid.CheckSquare : FontAwesome.Regular.Square, true);
+                base.LoadComplete();
+            }
+
+            protected override bool OnClick(ClickEvent e)
+            {
+                Checked.Value = !Checked.Value;
+                return true;
+            }
+        }
+    }
+}

osu.Game/Overlays/Comments/CommentsShowMoreButton.cs

@@ -0,0 +1,32 @@
+// 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.Bindables;
+using osu.Game.Graphics;
+using osu.Game.Graphics.UserInterface;
+
+namespace osu.Game.Overlays.Comments
+{
+    public class CommentsShowMoreButton : ShowMoreButton
+    {
+        public readonly BindableInt Current = new BindableInt();
+
+        public CommentsShowMoreButton()
+        {
+            IdleColour = OsuColour.Gray(0.3f);
+            HoverColour = OsuColour.Gray(0.4f);
+            ChevronIconColour = OsuColour.Gray(0.5f);
+        }
+
+        protected override void LoadComplete()
+        {
+            Current.BindValueChanged(onCurrentChanged, true);
+            base.LoadComplete();
+        }
+
+        private void onCurrentChanged(ValueChangedEvent<int> count)
+        {
+            Text = $@"Show More ({count.NewValue})".ToUpper();
+        }
+    }
+}

osu.Game/Overlays/Comments/DeletedChildrenPlaceholder.cs

@@ -0,0 +1,61 @@
+// 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.Containers;
+using osu.Framework.Graphics;
+using osu.Game.Graphics;
+using osu.Framework.Graphics.Sprites;
+using osuTK;
+using osu.Framework.Bindables;
+using Humanizer;
+
+namespace osu.Game.Overlays.Comments
+{
+    public class DeletedChildrenPlaceholder : FillFlowContainer
+    {
+        public readonly BindableBool ShowDeleted = new BindableBool();
+        public readonly BindableInt DeletedCount = new BindableInt();
+
+        private readonly SpriteText countText;
+
+        public DeletedChildrenPlaceholder()
+        {
+            AutoSizeAxes = Axes.Both;
+            Direction = FillDirection.Horizontal;
+            Spacing = new Vector2(3, 0);
+            Margin = new MarginPadding { Vertical = 10, Left = 80 };
+            Children = new Drawable[]
+            {
+                new SpriteIcon
+                {
+                    Icon = FontAwesome.Solid.Trash,
+                    Size = new Vector2(14),
+                },
+                countText = new SpriteText
+                {
+                    Font = OsuFont.GetFont(size: 14, weight: FontWeight.Bold, italics: true),
+                }
+            };
+        }
+
+        protected override void LoadComplete()
+        {
+            DeletedCount.BindValueChanged(_ => updateDisplay(), true);
+            ShowDeleted.BindValueChanged(_ => updateDisplay(), true);
+            base.LoadComplete();
+        }
+
+        private void updateDisplay()
+        {
+            if (DeletedCount.Value != 0)
+            {
+                countText.Text = @"deleted comment".ToQuantity(DeletedCount.Value);
+                this.FadeTo(ShowDeleted.Value ? 0 : 1);
+            }
+            else
+            {
+                Hide();
+            }
+        }
+    }
+}

osu.Game/Overlays/Comments/DrawableComment.cs

@@ -0,0 +1,363 @@
+// 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.Containers;
+using osu.Framework.Graphics;
+using osu.Game.Graphics;
+using osu.Framework.Graphics.Sprites;
+using osuTK;
+using osu.Game.Online.API.Requests.Responses;
+using osu.Game.Users.Drawables;
+using osu.Game.Graphics.Containers;
+using osu.Game.Utils;
+using osu.Framework.Graphics.Cursor;
+using osu.Framework.Bindables;
+using osu.Framework.Graphics.Shapes;
+using System.Linq;
+using osu.Game.Online.Chat;
+
+namespace osu.Game.Overlays.Comments
+{
+    public class DrawableComment : CompositeDrawable
+    {
+        private const int avatar_size = 40;
+        private const int margin = 10;
+
+        public readonly BindableBool ShowDeleted = new BindableBool();
+
+        private readonly BindableBool childrenExpanded = new BindableBool(true);
+
+        private readonly FillFlowContainer childCommentsVisibilityContainer;
+        private readonly Comment comment;
+
+        public DrawableComment(Comment comment)
+        {
+            LinkFlowContainer username;
+            FillFlowContainer childCommentsContainer;
+            DeletedChildrenPlaceholder deletedChildrenPlaceholder;
+            FillFlowContainer info;
+            LinkFlowContainer message;
+            GridContainer content;
+            VotePill votePill;
+
+            this.comment = comment;
+
+            RelativeSizeAxes = Axes.X;
+            AutoSizeAxes = Axes.Y;
+            InternalChild = new FillFlowContainer
+            {
+                RelativeSizeAxes = Axes.X,
+                AutoSizeAxes = Axes.Y,
+                Direction = FillDirection.Vertical,
+                Children = new Drawable[]
+                {
+                    new Container
+                    {
+                        RelativeSizeAxes = Axes.X,
+                        AutoSizeAxes = Axes.Y,
+                        Padding = new MarginPadding(margin),
+                        Child = content = new GridContainer
+                        {
+                            RelativeSizeAxes = Axes.X,
+                            AutoSizeAxes = Axes.Y,
+                            ColumnDimensions = new[]
+                            {
+                                new Dimension(GridSizeMode.AutoSize),
+                                new Dimension(),
+                            },
+                            RowDimensions = new[]
+                            {
+                                new Dimension(GridSizeMode.AutoSize)
+                            },
+                            Content = new[]
+                            {
+                                new Drawable[]
+                                {
+                                    new FillFlowContainer
+                                    {
+                                        AutoSizeAxes = Axes.Both,
+                                        Margin = new MarginPadding { Horizontal = margin },
+                                        Direction = FillDirection.Horizontal,
+                                        Spacing = new Vector2(5, 0),
+                                        Children = new Drawable[]
+                                        {
+                                            votePill = new VotePill(comment.VotesCount)
+                                            {
+                                                Anchor = Anchor.Centre,
+                                                Origin = Anchor.Centre,
+                                                AlwaysPresent = true,
+                                            },
+                                            new UpdateableAvatar(comment.User)
+                                            {
+                                                Anchor = Anchor.Centre,
+                                                Origin = Anchor.Centre,
+                                                Size = new Vector2(avatar_size),
+                                                Masking = true,
+                                                CornerRadius = avatar_size / 2f,
+                                            },
+                                        }
+                                    },
+                                    new FillFlowContainer
+                                    {
+                                        RelativeSizeAxes = Axes.X,
+                                        AutoSizeAxes = Axes.Y,
+                                        Spacing = new Vector2(0, 3),
+                                        Children = new Drawable[]
+                                        {
+                                            new FillFlowContainer
+                                            {
+                                                AutoSizeAxes = Axes.Both,
+                                                Direction = FillDirection.Horizontal,
+                                                Spacing = new Vector2(7, 0),
+                                                Children = new Drawable[]
+                                                {
+                                                    username = new LinkFlowContainer(s => s.Font = OsuFont.GetFont(size: 14, weight: FontWeight.Bold, italics: true))
+                                                    {
+                                                        AutoSizeAxes = Axes.Both,
+                                                    },
+                                                    new ParentUsername(comment),
+                                                    new SpriteText
+                                                    {
+                                                        Alpha = comment.IsDeleted ? 1 : 0,
+                                                        Font = OsuFont.GetFont(size: 14, weight: FontWeight.Bold, italics: true),
+                                                        Text = @"deleted",
+                                                    }
+                                                }
+                                            },
+                                            message = new LinkFlowContainer(s => s.Font = OsuFont.GetFont(size: 14))
+                                            {
+                                                RelativeSizeAxes = Axes.X,
+                                                AutoSizeAxes = Axes.Y,
+                                                Padding = new MarginPadding { Right = 40 }
+                                            },
+                                            info = new FillFlowContainer
+                                            {
+                                                AutoSizeAxes = Axes.Both,
+                                                Direction = FillDirection.Horizontal,
+                                                Spacing = new Vector2(10, 0),
+                                                Colour = OsuColour.Gray(0.7f),
+                                                Children = new Drawable[]
+                                                {
+                                                    new SpriteText
+                                                    {
+                                                        Anchor = Anchor.CentreLeft,
+                                                        Origin = Anchor.CentreLeft,
+                                                        Font = OsuFont.GetFont(size: 12),
+                                                        Text = HumanizerUtils.Humanize(comment.CreatedAt)
+                                                    },
+                                                    new RepliesButton(comment.RepliesCount)
+                                                    {
+                                                        Expanded = { BindTarget = childrenExpanded }
+                                                    },
+                                                }
+                                            }
+                                        }
+                                    }
+                                }
+                            }
+                        }
+                    },
+                    childCommentsVisibilityContainer = new FillFlowContainer
+                    {
+                        RelativeSizeAxes = Axes.X,
+                        AutoSizeAxes = Axes.Y,
+                        Direction = FillDirection.Vertical,
+                        Children = new Drawable[]
+                        {
+                            childCommentsContainer = new FillFlowContainer
+                            {
+                                Padding = new MarginPadding { Left = 20 },
+                                RelativeSizeAxes = Axes.X,
+                                AutoSizeAxes = Axes.Y,
+                                Direction = FillDirection.Vertical
+                            },
+                            deletedChildrenPlaceholder = new DeletedChildrenPlaceholder
+                            {
+                                ShowDeleted = { BindTarget = ShowDeleted }
+                            }
+                        }
+                    }
+                }
+            };
+
+            deletedChildrenPlaceholder.DeletedCount.Value = comment.DeletedChildrenCount;
+
+            if (comment.UserId.HasValue)
+                username.AddUserLink(comment.User);
+            else
+                username.AddText(comment.LegacyName);
+
+            if (comment.EditedAt.HasValue)
+            {
+                info.Add(new SpriteText
+                {
+                    Anchor = Anchor.CentreLeft,
+                    Origin = Anchor.CentreLeft,
+                    Font = OsuFont.GetFont(size: 12),
+                    Text = $@"edited {HumanizerUtils.Humanize(comment.EditedAt.Value)} by {comment.EditedUser.Username}"
+                });
+            }
+
+            if (comment.HasMessage)
+            {
+                var formattedSource = MessageFormatter.FormatText(comment.GetMessage);
+                message.AddLinks(formattedSource.Text, formattedSource.Links);
+            }
+
+            if (comment.IsDeleted)
+            {
+                content.FadeColour(OsuColour.Gray(0.5f));
+                votePill.Hide();
+            }
+
+            if (comment.IsTopLevel)
+            {
+                AddInternal(new Container
+                {
+                    RelativeSizeAxes = Axes.X,
+                    Height = 1.5f,
+                    Anchor = Anchor.BottomCentre,
+                    Origin = Anchor.BottomCentre,
+                    Child = new Box
+                    {
+                        RelativeSizeAxes = Axes.Both,
+                        Colour = OsuColour.Gray(0.1f)
+                    }
+                });
+
+                if (comment.ChildComments.Any())
+                {
+                    AddInternal(new ChevronButton(comment)
+                    {
+                        Anchor = Anchor.TopRight,
+                        Origin = Anchor.TopRight,
+                        Margin = new MarginPadding { Right = 30, Top = margin },
+                        Expanded = { BindTarget = childrenExpanded }
+                    });
+                }
+            }
+
+            comment.ChildComments.ForEach(c => childCommentsContainer.Add(new DrawableComment(c)
+            {
+                ShowDeleted = { BindTarget = ShowDeleted }
+            }));
+        }
+
+        protected override void LoadComplete()
+        {
+            ShowDeleted.BindValueChanged(show =>
+            {
+                if (comment.IsDeleted)
+                    this.FadeTo(show.NewValue ? 1 : 0);
+            }, true);
+            childrenExpanded.BindValueChanged(expanded => childCommentsVisibilityContainer.FadeTo(expanded.NewValue ? 1 : 0), true);
+            base.LoadComplete();
+        }
+
+        private class ChevronButton : ShowChildrenButton
+        {
+            private readonly SpriteIcon icon;
+
+            public ChevronButton(Comment comment)
+            {
+                Alpha = comment.IsTopLevel && comment.ChildComments.Any() ? 1 : 0;
+                Child = icon = new SpriteIcon
+                {
+                    Size = new Vector2(12),
+                    Colour = OsuColour.Gray(0.7f)
+                };
+            }
+
+            protected override void OnExpandedChanged(ValueChangedEvent<bool> expanded)
+            {
+                icon.Icon = expanded.NewValue ? FontAwesome.Solid.ChevronUp : FontAwesome.Solid.ChevronDown;
+            }
+        }
+
+        private class RepliesButton : ShowChildrenButton
+        {
+            private readonly SpriteText text;
+            private readonly int count;
+
+            public RepliesButton(int count)
+            {
+                this.count = count;
+
+                Alpha = count == 0 ? 0 : 1;
+                Child = text = new SpriteText
+                {
+                    Font = OsuFont.GetFont(size: 12, weight: FontWeight.Bold),
+                };
+            }
+
+            protected override void OnExpandedChanged(ValueChangedEvent<bool> expanded)
+            {
+                text.Text = $@"{(expanded.NewValue ? "[+]" : "[-]")} replies ({count})";
+            }
+        }
+
+        private class ParentUsername : FillFlowContainer, IHasTooltip
+        {
+            public string TooltipText => getParentMessage();
+
+            private readonly Comment parentComment;
+
+            public ParentUsername(Comment comment)
+            {
+                parentComment = comment.ParentComment;
+
+                AutoSizeAxes = Axes.Both;
+                Direction = FillDirection.Horizontal;
+                Spacing = new Vector2(3, 0);
+                Alpha = comment.ParentId == null ? 0 : 1;
+                Children = new Drawable[]
+                {
+                    new SpriteIcon
+                    {
+                        Icon = FontAwesome.Solid.Reply,
+                        Size = new Vector2(14),
+                    },
+                    new SpriteText
+                    {
+                        Font = OsuFont.GetFont(size: 14, weight: FontWeight.Bold, italics: true),
+                        Text = parentComment?.User?.Username ?? parentComment?.LegacyName
+                    }
+                };
+            }
+
+            private string getParentMessage()
+            {
+                if (parentComment == null)
+                    return string.Empty;
+
+                return parentComment.HasMessage ? parentComment.GetMessage : parentComment.IsDeleted ? @"deleted" : string.Empty;
+            }
+        }
+
+        private class VotePill : CircularContainer
+        {
+            public VotePill(int count)
+            {
+                AutoSizeAxes = Axes.X;
+                Height = 20;
+                Masking = true;
+                Children = new Drawable[]
+                {
+                    new Box
+                    {
+                        RelativeSizeAxes = Axes.Both,
+                        Colour = OsuColour.Gray(0.05f)
+                    },
+                    new SpriteText
+                    {
+                        Anchor = Anchor.Centre,
+                        Origin = Anchor.Centre,
+                        Margin = new MarginPadding { Horizontal = margin },
+                        Font = OsuFont.GetFont(size: 14),
+                        Text = $"+{count}"
+                    }
+                };
+            }
+        }
+    }
+}

osu.Game/Overlays/Comments/HeaderButton.cs

@@ -0,0 +1,69 @@
+// 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.Containers;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics;
+using osu.Framework.Input.Events;
+using osu.Game.Graphics.UserInterface;
+
+namespace osu.Game.Overlays.Comments
+{
+    public class HeaderButton : Container
+    {
+        private const int transition_duration = 200;
+
+        protected override Container<Drawable> Content => content;
+
+        private readonly Box background;
+        private readonly Container content;
+
+        public HeaderButton()
+        {
+            AutoSizeAxes = Axes.X;
+            Height = 20;
+            Masking = true;
+            CornerRadius = 3;
+            AddRangeInternal(new Drawable[]
+            {
+                background = new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Alpha = 0,
+                },
+                content = new Container
+                {
+                    AutoSizeAxes = Axes.Both,
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Margin = new MarginPadding { Horizontal = 10 }
+                },
+                new HoverClickSounds(),
+            });
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            background.Colour = colours.Gray4;
+        }
+
+        protected override bool OnHover(HoverEvent e)
+        {
+            ShowBackground();
+            return base.OnHover(e);
+        }
+
+        protected override void OnHoverLost(HoverLostEvent e)
+        {
+            base.OnHoverLost(e);
+            HideBackground();
+        }
+
+        protected void ShowBackground() => background.FadeIn(transition_duration, Easing.OutQuint);
+
+        protected void HideBackground() => background.FadeOut(transition_duration, Easing.OutQuint);
+    }
+}

osu.Game/Overlays/Comments/ShowChildrenButton.cs

@@ -0,0 +1,34 @@
+// 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.Game.Graphics.Containers;
+using osu.Framework.Input.Events;
+using osu.Framework.Bindables;
+
+namespace osu.Game.Overlays.Comments
+{
+    public abstract class ShowChildrenButton : OsuHoverContainer
+    {
+        public readonly BindableBool Expanded = new BindableBool(true);
+
+        protected ShowChildrenButton()
+        {
+            AutoSizeAxes = Axes.Both;
+        }
+
+        protected override void LoadComplete()
+        {
+            Expanded.BindValueChanged(OnExpandedChanged, true);
+            base.LoadComplete();
+        }
+
+        protected abstract void OnExpandedChanged(ValueChangedEvent<bool> expanded);
+
+        protected override bool OnClick(ClickEvent e)
+        {
+            Expanded.Value = !Expanded.Value;
+            return true;
+        }
+    }
+}

osu.Game/Overlays/Comments/SortTabControl.cs

@@ -0,0 +1,109 @@
+// 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.Containers;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.UserInterface;
+using osu.Framework.Graphics.Sprites;
+using osu.Game.Graphics;
+using osuTK;
+using osu.Game.Graphics.UserInterface;
+using osu.Framework.Input.Events;
+using osu.Framework.Bindables;
+using osu.Framework.Allocation;
+using osuTK.Graphics;
+
+namespace osu.Game.Overlays.Comments
+{
+    public class SortTabControl : OsuTabControl<CommentsSortCriteria>
+    {
+        protected override Dropdown<CommentsSortCriteria> CreateDropdown() => null;
+
+        protected override TabItem<CommentsSortCriteria> CreateTabItem(CommentsSortCriteria value) => new SortTabItem(value);
+
+        protected override TabFillFlowContainer CreateTabFlow() => new TabFillFlowContainer
+        {
+            AutoSizeAxes = Axes.Both,
+            Direction = FillDirection.Horizontal,
+            Spacing = new Vector2(5, 0),
+        };
+
+        public SortTabControl()
+        {
+            AutoSizeAxes = Axes.Both;
+        }
+
+        private class SortTabItem : TabItem<CommentsSortCriteria>
+        {
+            public SortTabItem(CommentsSortCriteria value)
+                : base(value)
+            {
+                AutoSizeAxes = Axes.Both;
+                Child = new TabButton(value) { Active = { BindTarget = Active } };
+            }
+
+            protected override void OnActivated()
+            {
+            }
+
+            protected override void OnDeactivated()
+            {
+            }
+
+            private class TabButton : HeaderButton
+            {
+                public readonly BindableBool Active = new BindableBool();
+
+                [Resolved]
+                private OsuColour colours { get; set; }
+
+                private readonly SpriteText text;
+
+                public TabButton(CommentsSortCriteria value)
+                {
+                    Add(text = new SpriteText
+                    {
+                        Font = OsuFont.GetFont(size: 14),
+                        Text = value.ToString()
+                    });
+                }
+
+                protected override void LoadComplete()
+                {
+                    base.LoadComplete();
+
+                    Active.BindValueChanged(active =>
+                    {
+                        updateBackgroundState();
+
+                        text.Font = text.Font.With(weight: active.NewValue ? FontWeight.Bold : FontWeight.Medium);
+                        text.Colour = active.NewValue ? colours.BlueLighter : Color4.White;
+                    }, true);
+                }
+
+                protected override bool OnHover(HoverEvent e)
+                {
+                    updateBackgroundState();
+                    return true;
+                }
+
+                protected override void OnHoverLost(HoverLostEvent e) => updateBackgroundState();
+
+                private void updateBackgroundState()
+                {
+                    if (Active.Value || IsHovered)
+                        ShowBackground();
+                    else
+                        HideBackground();
+                }
+            }
+        }
+    }
+
+    public enum CommentsSortCriteria
+    {
+        New,
+        Old,
+        Top
+    }
+}

osu.Game/Overlays/Music/PlaylistOverlay.cs

@@ -16,7 +16,7 @@ using osuTK.Graphics;
 
 namespace osu.Game.Overlays.Music
 {
-    public class PlaylistOverlay : OverlayContainer
+    public class PlaylistOverlay : VisibilityContainer
     {
         private const float transition_duration = 600;
         private const float playlist_height = 510;

osu.Game/Overlays/MusicController.cs

@@ -98,20 +98,13 @@ namespace osu.Game.Overlays
         /// <summary>
         /// Start playing the current track (if not already playing).
         /// </summary>
-        public void Play()
-        {
-            if (!IsPlaying)
-                TogglePause();
-        }
-
-        /// <summary>
-        /// Toggle pause / play.
-        /// </summary>
         /// <returns>Whether the operation was successful.</returns>
-        public bool TogglePause()
+        public bool Play(bool restart = false)
         {
             var track = current?.Track;
 
+            IsUserPaused = false;
+
             if (track == null)
             {
                 if (beatmap.Disabled)
@@ -121,16 +114,38 @@ namespace osu.Game.Overlays
                 return true;
             }
 
-            if (track.IsRunning)
-            {
-                IsUserPaused = true;
-                track.Stop();
-            }
-            else
-            {
+            if (restart)
+                track.Restart();
+            else if (!IsPlaying)
                 track.Start();
-                IsUserPaused = false;
-            }
+
+            return true;
+        }
+
+        /// <summary>
+        /// Stop playing the current track and pause at the current position.
+        /// </summary>
+        public void Stop()
+        {
+            var track = current?.Track;
+
+            IsUserPaused = true;
+            if (track?.IsRunning == true)
+                track.Stop();
+        }
+
+        /// <summary>
+        /// Toggle pause / play.
+        /// </summary>
+        /// <returns>Whether the operation was successful.</returns>
+        public bool TogglePause()
+        {
+            var track = current?.Track;
+
+            if (track?.IsRunning == true)
+                Stop();
+            else
+                Play();
 
             return true;
         }

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

@@ -19,7 +19,7 @@ namespace osu.Game.Overlays.Profile.Sections
 {
     public abstract class PaginatedContainer<TModel> : FillFlowContainer
     {
-        private readonly ShowMoreButton moreButton;
+        private readonly ProfileShowMoreButton moreButton;
         private readonly OsuSpriteText missingText;
         private APIRequest<List<TModel>> retrievalRequest;
         private CancellationTokenSource loadCancellation;
@@ -56,7 +56,7 @@ namespace osu.Game.Overlays.Profile.Sections
                     RelativeSizeAxes = Axes.X,
                     Spacing = new Vector2(0, 2),
                 },
-                moreButton = new ShowMoreButton
+                moreButton = new ProfileShowMoreButton
                 {
                     Anchor = Anchor.TopCentre,
                     Origin = Anchor.TopCentre,

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

@@ -0,0 +1,20 @@
+// 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.Game.Graphics;
+using osu.Game.Graphics.UserInterface;
+
+namespace osu.Game.Overlays.Profile.Sections
+{
+    public class ProfileShowMoreButton : ShowMoreButton
+    {
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colors)
+        {
+            IdleColour = colors.GreySeafoamDark;
+            HoverColour = colors.GreySeafoam;
+            ChevronIconColour = colors.Yellow;
+        }
+    }
+}

osu.Game/Overlays/SocialOverlay.cs

@@ -118,7 +118,7 @@ namespace osu.Game.Overlays
 
                 default:
                     var userRequest = new GetUsersRequest(); // TODO filter arguments!
-                    userRequest.Success += response => updateUsers(response.Select(r => r.User));
+                    userRequest.Success += res => updateUsers(res.Users.Select(r => r.User));
                     API.Queue(getUsersRequest = userRequest);
                     break;
             }

osu.Game/Overlays/Toolbar/Toolbar.cs

@@ -16,7 +16,7 @@ using osu.Game.Rulesets;
 
 namespace osu.Game.Overlays.Toolbar
 {
-    public class Toolbar : OverlayContainer
+    public class Toolbar : VisibilityContainer
     {
         public const float HEIGHT = 40;
         public const float TOOLTIP_HEIGHT = 30;
@@ -26,8 +26,6 @@ namespace osu.Game.Overlays.Toolbar
         private ToolbarUserButton userButton;
         private ToolbarRulesetSelector rulesetSelector;
 
-        protected override bool BlockPositionalInput => false;
-
         private const double transition_time = 500;
 
         private const float alpha_hovering = 0.8f;

osu.Game/Overlays/VolumeOverlay.cs

@@ -19,7 +19,7 @@ using osuTK.Graphics;
 
 namespace osu.Game.Overlays
 {
-    public class VolumeOverlay : OverlayContainer
+    public class VolumeOverlay : VisibilityContainer
     {
         private const float offset = 10;
 
@@ -28,8 +28,6 @@ namespace osu.Game.Overlays
         private VolumeMeter volumeMeterMusic;
         private MuteButton muteButton;
 
-        protected override bool BlockPositionalInput => false;
-
         private readonly BindableDouble muteAdjustment = new BindableDouble();
 
         private readonly Bindable<bool> isMuted = new Bindable<bool>();

osu.Game/Rulesets/Edit/PlacementBlueprint.cs

@@ -91,8 +91,10 @@ namespace osu.Game.Rulesets.Edit
         /// <summary>
         /// Signals that the placement of <see cref="HitObject"/> has started.
         /// </summary>
-        protected void BeginPlacement()
+        /// <param name="startTime">The start time of <see cref="HitObject"/> at the placement point. If null, the current clock time is used.</param>
+        protected void BeginPlacement(double? startTime = null)
         {
+            HitObject.StartTime = startTime ?? EditorClock.CurrentTime;
             placementHandler.BeginPlacement(HitObject);
             PlacementBegun = true;
         }

osu.Game/Rulesets/Edit/SelectionBlueprint.cs

@@ -45,6 +45,11 @@ namespace osu.Game.Rulesets.Edit
         /// </summary>
         public readonly DrawableHitObject HitObject;
 
+        /// <summary>
+        /// The screen-space position of <see cref="HitObject"/> prior to handling a movement event.
+        /// </summary>
+        internal Vector2 ScreenSpaceMovementStartPosition { get; private set; }
+
         protected override bool ShouldBeAlive => (HitObject.IsAlive && HitObject.IsPresent) || State == SelectionState.Selected;
         public override bool HandlePositionalInput => ShouldBeAlive;
         public override bool RemoveWhenNotAlive => false;
@@ -131,7 +136,11 @@ namespace osu.Game.Rulesets.Edit
             return base.OnClick(e);
         }
 
-        protected override bool OnDragStart(DragStartEvent e) => true;
+        protected override bool OnDragStart(DragStartEvent e)
+        {
+            ScreenSpaceMovementStartPosition = HitObject.ToScreenSpace(HitObject.OriginPosition);
+            return true;
+        }
 
         protected override bool OnDrag(DragEvent e)
         {

osu.Game/Rulesets/RulesetStore.cs

@@ -11,28 +11,22 @@ using osu.Game.Database;
 
 namespace osu.Game.Rulesets
 {
-    /// <summary>
-    /// Todo: All of this needs to be moved to a RulesetStore.
-    /// </summary>
-    public class RulesetStore : DatabaseBackedStore
+    public class RulesetStore : DatabaseBackedStore, IDisposable
     {
-        private static readonly Dictionary<Assembly, Type> loaded_assemblies = new Dictionary<Assembly, Type>();
+        private const string ruleset_library_prefix = "osu.Game.Rulesets";
 
-        static RulesetStore()
-        {
-            AppDomain.CurrentDomain.AssemblyResolve += currentDomain_AssemblyResolve;
-
-            // On android in release configuration assemblies are loaded from the apk directly into memory.
-            // We cannot read assemblies from cwd, so should check loaded assemblies instead.
-            loadFromAppDomain();
-
-            loadFromDisk();
-        }
+        private readonly Dictionary<Assembly, Type> loadedAssemblies = new Dictionary<Assembly, Type>();
 
         public RulesetStore(IDatabaseContextFactory factory)
             : base(factory)
         {
+            // On android in release configuration assemblies are loaded from the apk directly into memory.
+            // We cannot read assemblies from cwd, so should check loaded assemblies instead.
+            loadFromAppDomain();
+            loadFromDisk();
             addMissingRulesets();
+
+            AppDomain.CurrentDomain.AssemblyResolve += resolveRulesetAssembly;
         }
 
         /// <summary>
@@ -54,9 +48,7 @@ namespace osu.Game.Rulesets
         /// </summary>
         public IEnumerable<RulesetInfo> AvailableRulesets { get; private set; }
 
-        private static Assembly currentDomain_AssemblyResolve(object sender, ResolveEventArgs args) => loaded_assemblies.Keys.FirstOrDefault(a => a.FullName == args.Name);
-
-        private const string ruleset_library_prefix = "osu.Game.Rulesets";
+        private Assembly resolveRulesetAssembly(object sender, ResolveEventArgs args) => loadedAssemblies.Keys.FirstOrDefault(a => a.FullName == args.Name);
 
         private void addMissingRulesets()
         {
@@ -64,7 +56,7 @@ namespace osu.Game.Rulesets
             {
                 var context = usage.Context;
 
-                var instances = loaded_assemblies.Values.Select(r => (Ruleset)Activator.CreateInstance(r, (RulesetInfo)null)).ToList();
+                var instances = loadedAssemblies.Values.Select(r => (Ruleset)Activator.CreateInstance(r, (RulesetInfo)null)).ToList();
 
                 //add all legacy modes in correct order
                 foreach (var r in instances.Where(r => r.LegacyID != null).OrderBy(r => r.LegacyID))
@@ -113,7 +105,7 @@ namespace osu.Game.Rulesets
             }
         }
 
-        private static void loadFromAppDomain()
+        private void loadFromAppDomain()
         {
             foreach (var ruleset in AppDomain.CurrentDomain.GetAssemblies())
             {
@@ -126,7 +118,7 @@ namespace osu.Game.Rulesets
             }
         }
 
-        private static void loadFromDisk()
+        private void loadFromDisk()
         {
             try
             {
@@ -141,11 +133,11 @@ namespace osu.Game.Rulesets
             }
         }
 
-        private static void loadRulesetFromFile(string file)
+        private void loadRulesetFromFile(string file)
         {
             var filename = Path.GetFileNameWithoutExtension(file);
 
-            if (loaded_assemblies.Values.Any(t => t.Namespace == filename))
+            if (loadedAssemblies.Values.Any(t => t.Namespace == filename))
                 return;
 
             try
@@ -158,19 +150,30 @@ namespace osu.Game.Rulesets
             }
         }
 
-        private static void addRuleset(Assembly assembly)
+        private void addRuleset(Assembly assembly)
         {
-            if (loaded_assemblies.ContainsKey(assembly))
+            if (loadedAssemblies.ContainsKey(assembly))
                 return;
 
             try
             {
-                loaded_assemblies[assembly] = assembly.GetTypes().First(t => t.IsPublic && t.IsSubclassOf(typeof(Ruleset)));
+                loadedAssemblies[assembly] = assembly.GetTypes().First(t => t.IsPublic && t.IsSubclassOf(typeof(Ruleset)));
             }
             catch (Exception e)
             {
                 Logger.Error(e, $"Failed to add ruleset {assembly}");
             }
         }
+
+        public void Dispose()
+        {
+            Dispose(true);
+            GC.SuppressFinalize(this);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            AppDomain.CurrentDomain.AssemblyResolve -= resolveRulesetAssembly;
+        }
     }
 }

osu.Game/Screens/Edit/Compose/Components/BlueprintContainer.cs

@@ -216,7 +216,12 @@ namespace osu.Game.Screens.Edit.Compose.Components
 
         private void onSelectionRequested(SelectionBlueprint blueprint, InputState state) => selectionHandler.HandleSelectionRequested(blueprint, state);
 
-        private void onDragRequested(SelectionBlueprint blueprint, DragEvent dragEvent) => selectionHandler.HandleDrag(blueprint, dragEvent);
+        private void onDragRequested(SelectionBlueprint blueprint, DragEvent dragEvent)
+        {
+            var movePosition = blueprint.ScreenSpaceMovementStartPosition + dragEvent.ScreenSpaceMousePosition - dragEvent.ScreenSpaceMouseDownPosition;
+
+            selectionHandler.HandleMovement(new MoveSelectionEvent(blueprint, blueprint.ScreenSpaceMovementStartPosition, movePosition));
+        }
 
         protected override void Dispose(bool isDisposing)
         {

osu.Game/Screens/Edit/Compose/Components/CircularDistanceSnapGrid.cs

@@ -0,0 +1,59 @@
+// 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.Graphics;
+using osu.Framework.Graphics.UserInterface;
+using osu.Game.Rulesets.Objects;
+using osuTK;
+
+namespace osu.Game.Screens.Edit.Compose.Components
+{
+    public abstract class CircularDistanceSnapGrid : DistanceSnapGrid
+    {
+        protected CircularDistanceSnapGrid(HitObject hitObject, Vector2 centrePosition)
+            : base(hitObject, centrePosition)
+        {
+        }
+
+        protected override void CreateContent(Vector2 centrePosition)
+        {
+            float dx = Math.Max(centrePosition.X, DrawWidth - centrePosition.X);
+            float dy = Math.Max(centrePosition.Y, DrawHeight - centrePosition.Y);
+            float maxDistance = new Vector2(dx, dy).Length;
+
+            int requiredCircles = (int)(maxDistance / DistanceSpacing);
+
+            for (int i = 0; i < requiredCircles; i++)
+            {
+                float radius = (i + 1) * DistanceSpacing * 2;
+
+                AddInternal(new CircularProgress
+                {
+                    Origin = Anchor.Centre,
+                    Position = centrePosition,
+                    Current = { Value = 1 },
+                    Size = new Vector2(radius),
+                    InnerRadius = 4 * 1f / radius,
+                    Colour = GetColourForBeatIndex(i)
+                });
+            }
+        }
+
+        public override Vector2 GetSnapPosition(Vector2 position)
+        {
+            Vector2 direction = position - CentrePosition;
+
+            if (direction == Vector2.Zero)
+                direction = new Vector2(0.001f, 0.001f);
+
+            float distance = direction.Length;
+
+            float radius = DistanceSpacing;
+            int radialCount = Math.Max(1, (int)Math.Round(distance / radius));
+
+            Vector2 normalisedDirection = direction * new Vector2(1f / distance);
+            return CentrePosition + normalisedDirection * radialCount * radius;
+        }
+    }
+}

osu.Game/Screens/Edit/Compose/Components/DistanceSnapGrid.cs

@@ -0,0 +1,156 @@
+// 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.Caching;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Colour;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Types;
+using osuTK;
+
+namespace osu.Game.Screens.Edit.Compose.Components
+{
+    /// <summary>
+    /// A grid which takes user input and returns a quantized ("snapped") position and time.
+    /// </summary>
+    public abstract class DistanceSnapGrid : CompositeDrawable
+    {
+        /// <summary>
+        /// The velocity of the beatmap at the point of placement in pixels per millisecond.
+        /// </summary>
+        protected double Velocity { get; private set; }
+
+        /// <summary>
+        /// The spacing between each tick of the beat snapping grid.
+        /// </summary>
+        protected float DistanceSpacing { get; private set; }
+
+        /// <summary>
+        /// The position which the grid is centred on.
+        /// The first beat snapping tick is located at <see cref="CentrePosition"/> + <see cref="DistanceSpacing"/> in the desired direction.
+        /// </summary>
+        protected readonly Vector2 CentrePosition;
+
+        [Resolved]
+        private IEditorBeatmap beatmap { get; set; }
+
+        [Resolved]
+        private BindableBeatDivisor beatDivisor { get; set; }
+
+        [Resolved]
+        private OsuColour colours { get; set; }
+
+        private readonly Cached gridCache = new Cached();
+        private readonly HitObject hitObject;
+
+        private double startTime;
+        private double beatLength;
+
+        protected DistanceSnapGrid(HitObject hitObject, Vector2 centrePosition)
+        {
+            this.hitObject = hitObject;
+            this.CentrePosition = centrePosition;
+
+            RelativeSizeAxes = Axes.Both;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            startTime = (hitObject as IHasEndTime)?.EndTime ?? hitObject.StartTime;
+            beatLength = beatmap.ControlPointInfo.TimingPointAt(startTime).BeatLength;
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            beatDivisor.BindValueChanged(_ => updateSpacing(), true);
+        }
+
+        private void updateSpacing()
+        {
+            Velocity = GetVelocity(startTime, beatmap.ControlPointInfo, beatmap.BeatmapInfo.BaseDifficulty);
+            DistanceSpacing = (float)(beatLength / beatDivisor.Value * Velocity);
+            gridCache.Invalidate();
+        }
+
+        public override bool Invalidate(Invalidation invalidation = Invalidation.All, Drawable source = null, bool shallPropagate = true)
+        {
+            if ((invalidation & Invalidation.RequiredParentSizeToFit) > 0)
+                gridCache.Invalidate();
+
+            return base.Invalidate(invalidation, source, shallPropagate);
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            if (!gridCache.IsValid)
+            {
+                ClearInternal();
+                CreateContent(CentrePosition);
+                gridCache.Validate();
+            }
+        }
+
+        /// <summary>
+        /// Creates the content which visualises the grid ticks.
+        /// </summary>
+        protected abstract void CreateContent(Vector2 centrePosition);
+
+        /// <summary>
+        /// Retrieves the velocity of gameplay at a point in time in pixels per millisecond.
+        /// </summary>
+        /// <param name="time">The time to retrieve the velocity at.</param>
+        /// <param name="controlPointInfo">The beatmap's <see cref="ControlPointInfo"/> at the point in time.</param>
+        /// <param name="difficulty">The beatmap's <see cref="BeatmapDifficulty"/> at the point in time.</param>
+        /// <returns>The velocity.</returns>
+        protected abstract float GetVelocity(double time, ControlPointInfo controlPointInfo, BeatmapDifficulty difficulty);
+
+        /// <summary>
+        /// Snaps a position to this grid.
+        /// </summary>
+        /// <param name="position">The original position in coordinate space local to this <see cref="DistanceSnapGrid"/>.</param>
+        /// <returns>The snapped position in coordinate space local to this <see cref="DistanceSnapGrid"/>.</returns>
+        public abstract Vector2 GetSnapPosition(Vector2 position);
+
+        /// <summary>
+        /// Retrieves the time at a snapped position.
+        /// </summary>
+        /// <param name="position">The snapped position in coordinate space local to this <see cref="DistanceSnapGrid"/>.</param>
+        /// <returns>The time at the snapped position.</returns>
+        public double GetSnapTime(Vector2 position) => startTime + (position - CentrePosition).Length / Velocity;
+
+        /// <summary>
+        /// Retrieves the applicable colour for a beat index.
+        /// </summary>
+        /// <param name="index">The 0-based beat index.</param>
+        /// <returns>The applicable colour.</returns>
+        protected ColourInfo GetColourForBeatIndex(int index)
+        {
+            int beat = (index + 1) % beatDivisor.Value;
+            ColourInfo colour = colours.Gray5;
+
+            for (int i = 0; i < BindableBeatDivisor.VALID_DIVISORS.Length; i++)
+            {
+                int divisor = BindableBeatDivisor.VALID_DIVISORS[i];
+
+                if ((beat * divisor) % beatDivisor.Value == 0)
+                {
+                    colour = BindableBeatDivisor.GetColourFor(divisor, colours);
+                    break;
+                }
+            }
+
+            int repeatIndex = index / beatDivisor.Value;
+            return colour.MultiplyAlpha(0.5f / (repeatIndex + 1));
+        }
+    }
+}

osu.Game/Screens/Edit/Compose/Components/MoveSelectionEvent.cs

@@ -0,0 +1,46 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using osu.Game.Rulesets.Edit;
+using osuTK;
+
+namespace osu.Game.Screens.Edit.Compose.Components
+{
+    /// <summary>
+    /// An event which occurs when a <see cref="SelectionBlueprint"/> is moved.
+    /// </summary>
+    public class MoveSelectionEvent
+    {
+        /// <summary>
+        /// The <see cref="SelectionBlueprint"/> that triggered this <see cref="MoveSelectionEvent"/>.
+        /// </summary>
+        public readonly SelectionBlueprint Blueprint;
+
+        /// <summary>
+        /// The starting screen-space position of the hitobject.
+        /// </summary>
+        public readonly Vector2 ScreenSpaceStartPosition;
+
+        /// <summary>
+        /// The expected screen-space position of the hitobject at the current cursor position.
+        /// </summary>
+        public readonly Vector2 ScreenSpacePosition;
+
+        /// <summary>
+        /// The distance between <see cref="ScreenSpacePosition"/> and the hitobject's current position, in the coordinate-space of the hitobject's parent.
+        /// </summary>
+        /// <remarks>
+        /// This does not use <see cref="ScreenSpaceStartPosition"/> and does not represent the cumulative movement distance.
+        /// </remarks>
+        public readonly Vector2 InstantDelta;
+
+        public MoveSelectionEvent(SelectionBlueprint blueprint, Vector2 screenSpaceStartPosition, Vector2 screenSpacePosition)
+        {
+            Blueprint = blueprint;
+            ScreenSpaceStartPosition = screenSpaceStartPosition;
+            ScreenSpacePosition = screenSpacePosition;
+
+            InstantDelta = Blueprint.HitObject.Parent.ToLocalSpace(ScreenSpacePosition) - Blueprint.HitObject.Position;
+        }
+    }
+}

osu.Game/Screens/Edit/Compose/Components/SelectionHandler.cs

@@ -65,11 +65,10 @@ namespace osu.Game.Screens.Edit.Compose.Components
         #region User Input Handling
 
         /// <summary>
-        /// Handles the selected <see cref="DrawableHitObject"/>s being dragged.
+        /// Handles the selected <see cref="DrawableHitObject"/>s being moved.
         /// </summary>
-        /// <param name="blueprint">The <see cref="SelectionBlueprint"/> that received the drag event.</param>
-        /// <param name="dragEvent">The drag event.</param>
-        public virtual void HandleDrag(SelectionBlueprint blueprint, DragEvent dragEvent)
+        /// <param name="moveEvent">The move event.</param>
+        public virtual void HandleMovement(MoveSelectionEvent moveEvent)
         {
         }
 

osu.Game/Screens/Play/ResumeOverlay.cs

@@ -16,7 +16,7 @@ namespace osu.Game.Screens.Play
     /// <summary>
     /// An overlay which can be used to require further user actions before gameplay is resumed.
     /// </summary>
-    public abstract class ResumeOverlay : OverlayContainer
+    public abstract class ResumeOverlay : VisibilityContainer
     {
         public CursorContainer GameplayCursor { get; set; }
 
@@ -29,8 +29,6 @@ namespace osu.Game.Screens.Play
 
         protected const float TRANSITION_TIME = 500;
 
-        protected override bool BlockPositionalInput => false;
-
         protected abstract string Message { get; }
 
         public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => true;

osu.Game/Screens/Play/SkipOverlay.cs

@@ -23,7 +23,7 @@ using osu.Game.Input.Bindings;
 
 namespace osu.Game.Screens.Play
 {
-    public class SkipOverlay : OverlayContainer, IKeyBindingHandler<GlobalAction>
+    public class SkipOverlay : VisibilityContainer, IKeyBindingHandler<GlobalAction>
     {
         private readonly double startTime;
 
@@ -36,7 +36,6 @@ namespace osu.Game.Screens.Play
         private double displayTime;
 
         public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => true;
-        protected override bool BlockPositionalInput => false;
 
         /// <summary>
         /// Displays a skip overlay, giving the user the ability to skip forward.

osu.Game/Screens/Select/BeatmapInfoWedge.cs

@@ -29,7 +29,7 @@ using osu.Game.Rulesets.UI;
 
 namespace osu.Game.Screens.Select
 {
-    public class BeatmapInfoWedge : OverlayContainer
+    public class BeatmapInfoWedge : VisibilityContainer
     {
         private const float shear_width = 36.75f;
 
@@ -62,8 +62,6 @@ namespace osu.Game.Screens.Select
             ruleset.ValueChanged += _ => updateDisplay();
         }
 
-        protected override bool BlockPositionalInput => false;
-
         protected override void PopIn()
         {
             this.MoveToX(0, 800, Easing.OutQuint);

osu.Game/Screens/Select/SongSelect.cs

@@ -66,11 +66,7 @@ namespace osu.Game.Screens.Select
         /// </summary>
         protected readonly Container FooterPanels;
 
-        protected override BackgroundScreen CreateBackground()
-        {
-            var background = new BackgroundScreenBeatmap();
-            return background;
-        }
+        protected override BackgroundScreen CreateBackground() => new BackgroundScreenBeatmap();
 
         protected readonly BeatmapCarousel Carousel;
         private readonly BeatmapInfoWedge beatmapInfoWedge;
@@ -490,7 +486,9 @@ namespace osu.Game.Screens.Select
             if (Beatmap != null && !Beatmap.Value.BeatmapSetInfo.DeletePending)
             {
                 UpdateBeatmap(Beatmap.Value);
-                ensurePlayingSelected();
+
+                // restart playback on returning to song select, regardless.
+                music?.Play();
             }
 
             base.OnResuming(last);
@@ -596,7 +594,7 @@ namespace osu.Game.Screens.Select
             track.RestartPoint = Beatmap.Value.Metadata.PreviewTime;
 
             if (!track.IsRunning && (music?.IsUserPaused != true || isNewTrack))
-                track.Restart();
+                music?.Play(true);
 
             lastTrack.SetTarget(track);
         }