Merge pull request #3456 from peppy/update-framework

Update framework

README.md

@@ -24,7 +24,9 @@ Clone the repository including submodules
 Build and run
 
 - Using Visual Studio 2017, Rider or Visual Studio Code (configurations are included)
-- From command line using `dotnet run --project osu.Desktop`
+- From command line using `dotnet run --project osu.Desktop`. When building for non-development purposes, add `-c Release` to gain higher performance.
+
+Note: If you run from command line under linux, you will need to prefix the output folder to your `LD_LIBRARY_PATH`. See `.vscode/launch.json` for an example
 
 If you run into issues building you may need to restore nuget packages (commonly via `dotnet restore`). Visual Studio Code users must run `Restore` task from debug tab before attempt to build.
 

osu.Desktop/Program.cs

@@ -63,7 +63,7 @@ namespace osu.Desktop
         {
             bool continueExecution = Interlocked.Decrement(ref allowableExceptions) >= 0;
 
-            Logger.Log($"Unhandled exception has been {(continueExecution ? "allowed with {allowableExceptions} more allowable exceptions" : "denied")} .");
+            Logger.Log($"Unhandled exception has been {(continueExecution ? $"allowed with {allowableExceptions} more allowable exceptions" : "denied")} .");
 
             // restore the stock of allowable exceptions after a short delay.
             Task.Delay(1000).ContinueWith(_ => Interlocked.Increment(ref allowableExceptions));

osu.Desktop/osu.Desktop.csproj

@@ -27,9 +27,9 @@
   </ItemGroup>
   <ItemGroup Label="Package References">
     <PackageReference Include="System.IO.Packaging" Version="4.5.0" />
-    <PackageReference Include="ppy.squirrel.windows" Version="1.8.0.5" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.1" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.1.1" />
+    <PackageReference Include="ppy.squirrel.windows" Version="1.8.0.6" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.3" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.1.3" />
   </ItemGroup>
   <ItemGroup Label="Resources">
     <EmbeddedResource Include="lazer.ico" />

osu.Game.Rulesets.Catch/Beatmaps/CatchBeatmapProcessor.cs

@@ -74,42 +74,42 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
 
         private void initialiseHyperDash(List<CatchHitObject> objects)
         {
-            // todo: add difficulty adjust.
-            double halfCatcherWidth = CatcherArea.CATCHER_SIZE * (objects.FirstOrDefault()?.Scale ?? 1) / CatchPlayfield.BASE_WIDTH / 2;
+            List<CatchHitObject> objectWithDroplets = new List<CatchHitObject>();
 
+            foreach (var currentObject in objects)
+            {
+                if (currentObject is Fruit)
+                    objectWithDroplets.Add(currentObject);
+                if (currentObject is JuiceStream)
+                    foreach (var currentJuiceElement in currentObject.NestedHitObjects)
+                        if (!(currentJuiceElement is TinyDroplet))
+                            objectWithDroplets.Add((CatchHitObject)currentJuiceElement);
+            }
+
+            objectWithDroplets.Sort((h1, h2) => h1.StartTime.CompareTo(h2.StartTime));
+
+            double halfCatcherWidth = CatcherArea.GetCatcherSize(Beatmap.BeatmapInfo.BaseDifficulty) / 2;
             int lastDirection = 0;
             double lastExcess = halfCatcherWidth;
 
-            int objCount = objects.Count;
-
-            for (int i = 0; i < objCount - 1; i++)
+            for (int i = 0; i < objectWithDroplets.Count - 1; i++)
             {
-                CatchHitObject currentObject = objects[i];
-
-                // not needed?
-                // if (currentObject is TinyDroplet) continue;
-
-                CatchHitObject nextObject = objects[i + 1];
-
-                // while (nextObject is TinyDroplet)
-                // {
-                //     if (++i == objCount - 1) break;
-                //     nextObject = objects[i + 1];
-                // }
+                CatchHitObject currentObject = objectWithDroplets[i];
+                CatchHitObject nextObject = objectWithDroplets[i + 1];
 
                 int thisDirection = nextObject.X > currentObject.X ? 1 : -1;
-                double timeToNext = nextObject.StartTime - ((currentObject as IHasEndTime)?.EndTime ?? currentObject.StartTime) - 4;
+                double timeToNext = nextObject.StartTime - currentObject.StartTime;
                 double distanceToNext = Math.Abs(nextObject.X - currentObject.X) - (lastDirection == thisDirection ? lastExcess : halfCatcherWidth);
-
-                if (timeToNext * CatcherArea.Catcher.BASE_SPEED < distanceToNext)
+                float distanceToHyper = (float)(timeToNext * CatcherArea.Catcher.BASE_SPEED - distanceToNext);
+                if (distanceToHyper < 0)
                 {
                     currentObject.HyperDashTarget = nextObject;
                     lastExcess = halfCatcherWidth;
                 }
                 else
                 {
-                    //currentObject.DistanceToHyperDash = timeToNext - distanceToNext;
-                    lastExcess = MathHelper.Clamp(timeToNext - distanceToNext, 0, halfCatcherWidth);
+                    currentObject.DistanceToHyperDash = distanceToHyper;
+                    lastExcess = MathHelper.Clamp(distanceToHyper, 0, halfCatcherWidth);
                 }
 
                 lastDirection = thisDirection;

osu.Game.Rulesets.Catch/Objects/CatchHitObject.cs

@@ -16,7 +16,7 @@ namespace osu.Game.Rulesets.Catch.Objects
 
         public int IndexInBeatmap { get; set; }
 
-        public virtual FruitVisualRepresentation VisualRepresentation => (FruitVisualRepresentation)(IndexInBeatmap % 4);
+        public virtual FruitVisualRepresentation VisualRepresentation => (FruitVisualRepresentation)(ComboIndex % 4);
 
         public virtual bool NewCombo { get; set; }
 
@@ -27,7 +27,9 @@ namespace osu.Game.Rulesets.Catch.Objects
         public int ComboIndex { get; set; }
 
         /// <summary>
-        /// The distance for a fruit to to next hyper if it's not a hyper.
+        /// Difference between the distance to the next object
+        /// and the distance that would have triggered a hyper dash.
+        /// A value close to 0 indicates a difficult jump (for difficulty calculation).
         /// </summary>
         public float DistanceToHyperDash { get; set; }
 

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

@@ -22,6 +22,8 @@ namespace osu.Game.Rulesets.Catch.UI
 
         private readonly CatcherArea catcherArea;
 
+        protected override bool UserScrollSpeedAdjustment => false;
+
         public CatchPlayfield(BeatmapDifficulty difficulty, Func<CatchHitObject, DrawableHitObject<CatchHitObject>> getVisualRepresentation)
             : base(BASE_WIDTH)
         {

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

@@ -107,6 +107,11 @@ namespace osu.Game.Rulesets.Catch.UI
 
         public bool AttemptCatch(CatchHitObject obj) => MovableCatcher.AttemptCatch(obj);
 
+        public static float GetCatcherSize(BeatmapDifficulty difficulty)
+        {
+            return CATCHER_SIZE / CatchPlayfield.BASE_WIDTH * (1.0f - 0.7f * (difficulty.CircleSize - 5) / 5);
+        }
+
         public class Catcher : Container, IKeyBindingHandler<CatchAction>
         {
             /// <summary>
@@ -407,9 +412,7 @@ namespace osu.Game.Rulesets.Catch.UI
             /// </summary>
             public void Explode()
             {
-                var fruit = caughtFruit.ToArray();
-
-                foreach (var f in fruit)
+                foreach (var f in caughtFruit.ToArray())
                     Explode(f);
             }
 
@@ -422,15 +425,15 @@ namespace osu.Game.Rulesets.Catch.UI
                     fruit.Anchor = Anchor.TopLeft;
                     fruit.Position = caughtFruit.ToSpaceOfOtherDrawable(fruit.DrawPosition, ExplodingFruitTarget);
 
-                    caughtFruit.Remove(fruit);
+                    if (!caughtFruit.Remove(fruit))
+                        // we may have already been removed by a previous operation (due to the weird OnLoadComplete scheduling).
+                        // this avoids a crash on potentially attempting to Add a fruit to ExplodingFruitTarget twice.
+                        return;
 
                     ExplodingFruitTarget.Add(fruit);
                 }
 
-                fruit.MoveToY(fruit.Y - 50, 250, Easing.OutSine)
-                 .Then()
-                 .MoveToY(fruit.Y + 50, 500, Easing.InSine);
-
+                fruit.MoveToY(fruit.Y - 50, 250, Easing.OutSine).Then().MoveToY(fruit.Y + 50, 500, Easing.InSine);
                 fruit.MoveToX(fruit.X + originalX * 6, 1000);
                 fruit.FadeOut(750);
 

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

@@ -173,26 +173,18 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             var pattern = new Pattern();
 
             int usableColumns = TotalColumns - RandomStart - PreviousPattern.ColumnWithObjects;
-            int nextColumn = Random.Next(RandomStart, TotalColumns);
+            int nextColumn = GetRandomColumn();
             for (int i = 0; i < Math.Min(usableColumns, noteCount); i++)
             {
                 // Find available column
-                RunWhile(() => pattern.ColumnHasObject(nextColumn) || PreviousPattern.ColumnHasObject(nextColumn), () =>
-                {
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-                });
-
+                nextColumn = FindAvailableColumn(nextColumn, pattern, PreviousPattern);
                 addToPattern(pattern, nextColumn, startTime, EndTime);
             }
 
             // This is can't be combined with the above loop due to RNG
             for (int i = 0; i < noteCount - usableColumns; i++)
             {
-                RunWhile(() => pattern.ColumnHasObject(nextColumn), () =>
-                {
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-                });
-
+                nextColumn = FindAvailableColumn(nextColumn, pattern);
                 addToPattern(pattern, nextColumn, startTime, EndTime);
             }
 
@@ -217,23 +209,13 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
             int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
             if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
-            {
-                RunWhile(() => PreviousPattern.ColumnHasObject(nextColumn), () =>
-                {
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-                });
-            }
+                nextColumn = FindAvailableColumn(nextColumn, PreviousPattern);
 
             int lastColumn = nextColumn;
             for (int i = 0; i < noteCount; i++)
             {
                 addToPattern(pattern, nextColumn, startTime, startTime);
-
-                RunWhile(() => nextColumn == lastColumn, () =>
-                {
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-                });
-
+                nextColumn = FindAvailableColumn(nextColumn, validation: c => c != lastColumn);
                 lastColumn = nextColumn;
                 startTime += SegmentDuration;
             }
@@ -325,7 +307,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                 if (TotalColumns > 2)
                     addToPattern(pattern, nextColumn, startTime, startTime);
 
-                nextColumn = Random.Next(RandomStart, TotalColumns);
+                nextColumn = GetRandomColumn();
                 startTime += SegmentDuration;
             }
 
@@ -404,20 +386,11 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
             int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
             if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
-            {
-                RunWhile(() => PreviousPattern.ColumnHasObject(nextColumn), () =>
-                {
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-                });
-            }
+                nextColumn = FindAvailableColumn(nextColumn, PreviousPattern);
 
             for (int i = 0; i < columnRepeat; i++)
             {
-                RunWhile(() => pattern.ColumnHasObject(nextColumn), () =>
-                {
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-                });
-
+                nextColumn = FindAvailableColumn(nextColumn, pattern);
                 addToPattern(pattern, nextColumn, startTime, EndTime);
                 startTime += SegmentDuration;
             }
@@ -442,17 +415,12 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
             int holdColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
             if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
-            {
-                RunWhile(() => PreviousPattern.ColumnHasObject(holdColumn), () =>
-                {
-                    holdColumn = Random.Next(RandomStart, TotalColumns);
-                });
-            }
+                holdColumn = FindAvailableColumn(holdColumn, PreviousPattern);
 
             // Create the hold note
             addToPattern(pattern, holdColumn, startTime, EndTime);
 
-            int nextColumn = Random.Next(RandomStart, TotalColumns);
+            int nextColumn = GetRandomColumn();
             int noteCount;
             if (ConversionDifficulty > 6.5)
                 noteCount = GetRandomNoteCount(0.63, 0);
@@ -473,11 +441,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                 {
                     for (int j = 0; j < noteCount; j++)
                     {
-                        RunWhile(() => rowPattern.ColumnHasObject(nextColumn) || nextColumn == holdColumn, () =>
-                        {
-                            nextColumn = Random.Next(RandomStart, TotalColumns);
-                        });
-
+                        nextColumn = FindAvailableColumn(nextColumn, validation: c => c != holdColumn, patterns: rowPattern);
                         addToPattern(rowPattern, nextColumn, startTime, startTime);
                     }
                 }

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

@@ -39,34 +39,17 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                     addToPattern(pattern, 0, generateHold);
                     break;
                 case 8:
-                    addToPattern(pattern, getNextRandomColumn(RandomStart), generateHold);
+                    addToPattern(pattern, FindAvailableColumn(GetRandomColumn(), PreviousPattern), generateHold);
                     break;
                 default:
                     if (TotalColumns > 0)
-                        addToPattern(pattern, getNextRandomColumn(0), generateHold);
+                        addToPattern(pattern, GetRandomColumn(), generateHold);
                     break;
             }
 
             return pattern;
         }
 
-        /// <summary>
-        /// Picks a random column after a column.
-        /// </summary>
-        /// <param name="start">The starting column.</param>
-        /// <returns>A random column after <paramref name="start"/>.</returns>
-        private int getNextRandomColumn(int start)
-        {
-            int nextColumn = Random.Next(start, TotalColumns);
-
-            RunWhile(() => PreviousPattern.ColumnHasObject(nextColumn), () =>
-            {
-                nextColumn = Random.Next(start, TotalColumns);
-            });
-
-            return nextColumn;
-        }
-
         /// <summary>
         /// Constructs and adds a note to a pattern.
         /// </summary>

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

@@ -25,9 +25,6 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                                          PatternType lastStair, IBeatmap originalBeatmap)
             : base(random, hitObject, beatmap, previousPattern, originalBeatmap)
         {
-            if (previousTime > hitObject.StartTime) throw new ArgumentOutOfRangeException(nameof(previousTime));
-            if (density < 0) throw new ArgumentOutOfRangeException(nameof(density));
-
             StairType = lastStair;
 
             TimingControlPoint timingPoint = beatmap.ControlPointInfo.TimingPointAt(hitObject.StartTime);
@@ -234,22 +231,27 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
             for (int i = 0; i < noteCount; i++)
             {
-                RunWhile(() => pattern.ColumnHasObject(nextColumn) || PreviousPattern.ColumnHasObject(nextColumn) && !allowStacking, () =>
-                {
-                    if (convertType.HasFlag(PatternType.Gathered))
-                    {
-                        nextColumn++;
-                        if (nextColumn == TotalColumns)
-                            nextColumn = RandomStart;
-                    }
-                    else
-                        nextColumn = Random.Next(RandomStart, TotalColumns);
-                });
+                nextColumn = allowStacking
+                    ? FindAvailableColumn(nextColumn, nextColumn: getNextColumn, patterns: pattern)
+                    : FindAvailableColumn(nextColumn, nextColumn: getNextColumn, patterns: new[] { pattern, PreviousPattern });
 
                 addToPattern(pattern, nextColumn);
             }
 
             return pattern;
+
+            int getNextColumn(int last)
+            {
+                if (convertType.HasFlag(PatternType.Gathered))
+                {
+                    last++;
+                    if (last == TotalColumns)
+                        last = RandomStart;
+                }
+                else
+                    last = GetRandomColumn();
+                return last;
+            }
         }
 
         /// <summary>
@@ -295,13 +297,10 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             int noteCount = getRandomNoteCountMirrored(centreProbability, p2, p3, out addToCentre);
 
             int columnLimit = (TotalColumns % 2 == 0 ? TotalColumns : TotalColumns - 1) / 2;
-            int nextColumn = Random.Next(RandomStart, columnLimit);
+            int nextColumn = GetRandomColumn(upperBound: columnLimit);
             for (int i = 0; i < noteCount; i++)
             {
-                RunWhile(() => pattern.ColumnHasObject(nextColumn), () =>
-                {
-                    nextColumn = Random.Next(RandomStart, columnLimit);
-                });
+                nextColumn = FindAvailableColumn(nextColumn, upperBound: columnLimit, patterns: pattern);
 
                 // Add normal note
                 addToPattern(pattern, nextColumn);

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

@@ -3,6 +3,7 @@
 
 using System;
 using System.Linq;
+using JetBrains.Annotations;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Mania.MathUtils;
 using osu.Game.Rulesets.Objects;
@@ -90,6 +91,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         }
 
         private double? conversionDifficulty;
+
         /// <summary>
         /// A difficulty factor used for various conversion methods from osu!stable.
         /// </summary>
@@ -116,5 +118,82 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                 return conversionDifficulty.Value;
             }
         }
+
+        /// <summary>
+        /// Finds a new column in which a <see cref="HitObject"/> can be placed.
+        /// This uses <see cref="GetRandomColumn"/> to pick the next candidate column.
+        /// </summary>
+        /// <param name="initialColumn">The initial column to test. This may be returned if it is already a valid column.</param>
+        /// <param name="patterns">A list of patterns for which the validity of a column should be checked against.
+        /// A column is not a valid candidate if a <see cref="HitObject"/> occupies the same column in any of the patterns.</param>
+        /// <returns>A column for which there are no <see cref="HitObject"/>s in any of <paramref name="patterns"/> occupying the same column.</returns>
+        /// <exception cref="NotEnoughColumnsException">If there are no valid candidate columns.</exception>
+        protected int FindAvailableColumn(int initialColumn, params Pattern[] patterns)
+            => FindAvailableColumn(initialColumn, null, patterns: patterns);
+
+        /// <summary>
+        /// Finds a new column in which a <see cref="HitObject"/> can be placed.
+        /// </summary>
+        /// <param name="initialColumn">The initial column to test. This may be returned if it is already a valid column.</param>
+        /// <param name="nextColumn">A function to retrieve the next column. If null, a randomisation scheme will be used.</param>
+        /// <param name="validation">A function to perform additional validation checks to determine if a column is a valid candidate for a <see cref="HitObject"/>.</param>
+        /// <param name="lowerBound">The minimum column index. If null, <see cref="RandomStart"/> is used.</param>
+        /// <param name="upperBound">The maximum column index. If null, <see cref="PatternGenerator.TotalColumns"/> is used.</param>
+        /// <param name="patterns">A list of patterns for which the validity of a column should be checked against.
+        /// A column is not a valid candidate if a <see cref="HitObject"/> occupies the same column in any of the patterns.</param>
+        /// <returns>A column which has passed the <paramref name="validation"/> check and for which there are no
+        /// <see cref="HitObject"/>s in any of <paramref name="patterns"/> occupying the same column.</returns>
+        /// <exception cref="NotEnoughColumnsException">If there are no valid candidate columns.</exception>
+        protected int FindAvailableColumn(int initialColumn, int? lowerBound = null, int? upperBound = null, Func<int, int> nextColumn = null, [InstantHandle] Func<int, bool> validation = null,
+                                          params Pattern[] patterns)
+        {
+            lowerBound = lowerBound ?? RandomStart;
+            upperBound = upperBound ?? TotalColumns;
+            nextColumn = nextColumn ?? (_ => GetRandomColumn(lowerBound, upperBound));
+
+            // Check for the initial column
+            if (isValid(initialColumn))
+                return initialColumn;
+
+            // Ensure that we have at least one free column, so that an endless loop is avoided
+            bool hasValidColumns = false;
+            for (int i = lowerBound.Value; i < upperBound.Value; i++)
+            {
+                hasValidColumns = isValid(i);
+                if (hasValidColumns)
+                    break;
+            }
+
+            if (!hasValidColumns)
+                throw new NotEnoughColumnsException();
+
+            // Iterate until a valid column is found. This is a random iteration in the default case.
+            do
+            {
+                initialColumn = nextColumn(initialColumn);
+            } while (!isValid(initialColumn));
+
+            return initialColumn;
+
+            bool isValid(int column) => validation?.Invoke(column) != false && !patterns.Any(p => p.ColumnHasObject(column));
+        }
+
+        /// <summary>
+        /// Returns a random column index in the range [<paramref name="lowerBound"/>, <paramref name="upperBound"/>).
+        /// </summary>
+        /// <param name="lowerBound">The minimum column index. If null, <see cref="RandomStart"/> is used.</param>
+        /// <param name="upperBound">The maximum column index. If null, <see cref="PatternGenerator.TotalColumns"/> is used.</param>
+        protected int GetRandomColumn(int? lowerBound = null, int? upperBound = null) => Random.Next(lowerBound ?? RandomStart, upperBound ?? TotalColumns);
+
+        /// <summary>
+        /// Occurs when mania conversion is stuck in an infinite loop unable to find columns to place new hitobjects in.
+        /// </summary>
+        public class NotEnoughColumnsException : Exception
+        {
+            public NotEnoughColumnsException()
+                : base("There were not enough columns to complete conversion.")
+            {
+            }
+        }
     }
 }

osu.Game.Rulesets.Mania/Beatmaps/Patterns/PatternGenerator.cs

@@ -3,9 +3,6 @@
 
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
-using JetBrains.Annotations;
-using osu.Framework.Logging;
 using osu.Game.Rulesets.Objects;
 
 namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns
@@ -15,14 +12,6 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns
     /// </summary>
     internal abstract class PatternGenerator
     {
-        /// <summary>
-        /// An arbitrary maximum amount of iterations to perform in <see cref="RunWhile"/>.
-        /// The specific value is not super important - enough such that no false-positives occur.
-        ///
-        /// /b/933228 requires at least 23 iterations.
-        /// </summary>
-        private const int max_rng_iterations = 30;
-
         /// <summary>
         /// The last pattern.
         /// </summary>
@@ -53,44 +42,10 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns
             TotalColumns = Beatmap.TotalColumns;
         }
 
-        protected void RunWhile([InstantHandle] Func<bool> condition, Action action)
-        {
-            int iterations = 0;
-
-            while (condition())
-            {
-                if (iterations++ >= max_rng_iterations)
-                {
-                    // log an error but don't throw. we want to continue execution.
-                    Logger.Error(new ExceededAllowedIterationsException(new StackTrace(0)),
-                        "Conversion encountered errors. The beatmap may not be correctly converted.");
-                    return;
-                }
-
-                action();
-            }
-        }
-
         /// <summary>
         /// Generates the patterns for <see cref="HitObject"/>, each filled with hit objects.
         /// </summary>
         /// <returns>The <see cref="Pattern"/>s containing the hit objects.</returns>
         public abstract IEnumerable<Pattern> Generate();
-
-        /// <summary>
-        /// Denotes when a single conversion operation is in an infinitely looping state.
-        /// </summary>
-        public class ExceededAllowedIterationsException : Exception
-        {
-            private readonly string stackTrace;
-
-            public ExceededAllowedIterationsException(StackTrace stackTrace)
-            {
-                this.stackTrace = stackTrace.ToString();
-            }
-
-            public override string StackTrace => stackTrace;
-            public override string ToString() => $"{GetType().Name}: {Message}\r\n{StackTrace}";
-        }
     }
 }

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

@@ -111,6 +111,18 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
             bodyPiece.Height = DrawHeight - Head.Height / 2 + Tail.Height / 2;
         }
 
+        protected void BeginHold()
+        {
+            holdStartTime = Time.Current;
+            bodyPiece.Hitting = true;
+        }
+
+        protected void EndHold()
+        {
+            holdStartTime = null;
+            bodyPiece.Hitting = false;
+        }
+
         public bool OnPressed(ManiaAction action)
         {
             // Make sure the action happened within the body of the hold note
@@ -123,8 +135,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
             // The user has pressed during the body of the hold note, after the head note and its hit windows have passed
             // and within the limited range of the above if-statement. This state will be managed by the head note if the
             // user has pressed during the hit windows of the head note.
-            holdStartTime = Time.Current;
-
+            BeginHold();
             return true;
         }
 
@@ -137,7 +148,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
             if (action != Action.Value)
                 return false;
 
-            holdStartTime = null;
+            EndHold();
 
             // If the key has been released too early, the user should not receive full score for the release
             if (!Tail.IsHit)
@@ -170,7 +181,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables
 
                 // The head note also handles early hits before the body, but we want accurate early hits to count as the body being held
                 // The body doesn't handle these early early hits, so we have to explicitly set the holding state here
-                holdNote.holdStartTime = Time.Current;
+                holdNote.BeginHold();
 
                 return true;
             }

osu.Game.Rulesets.Mania/Objects/Drawables/Pieces/BodyPiece.cs

@@ -32,6 +32,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables.Pieces
                 background = new Box { RelativeSizeAxes = Axes.Both },
                 foreground = new BufferedContainer
                 {
+                    Blending = BlendingMode.Additive,
                     RelativeSizeAxes = Axes.Both,
                     CacheDrawnFrameBuffer = true,
                     Children = new Drawable[]
@@ -73,6 +74,7 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables.Pieces
         }
 
         private Color4 accentColour;
+
         public Color4 AccentColour
         {
             get { return accentColour; }
@@ -86,6 +88,16 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables.Pieces
             }
         }
 
+        public bool Hitting
+        {
+            get { return hitting; }
+            set
+            {
+                hitting = value;
+                updateAccentColour();
+            }
+        }
+
         private Cached subtractionCache = new Cached();
 
         public override bool Invalidate(Invalidation invalidation = Invalidation.All, Drawable source = null, bool shallPropagate = true)
@@ -118,13 +130,26 @@ namespace osu.Game.Rulesets.Mania.Objects.Drawables.Pieces
             }
         }
 
+        private bool hitting;
+
         private void updateAccentColour()
         {
             if (!IsLoaded)
                 return;
 
-            foreground.Colour = AccentColour.Opacity(0.9f);
-            background.Colour = AccentColour.Opacity(0.6f);
+            foreground.Colour = AccentColour.Opacity(0.5f);
+            background.Colour = AccentColour.Opacity(0.7f);
+
+            const float animation_length = 50;
+
+            foreground.ClearTransforms(false, nameof(foreground.Colour));
+            if (hitting)
+            {
+                // wait for the next sync point
+                double synchronisedOffset = animation_length * 2 - Time.Current % (animation_length * 2);
+                using (foreground.BeginDelayedSequence(synchronisedOffset))
+                    foreground.FadeColour(AccentColour.Lighten(0.2f), animation_length).Then().FadeColour(foreground.Colour, animation_length).Loop();
+            }
 
             subtractionCache.Invalidate();
         }

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

@@ -26,11 +26,11 @@ namespace osu.Game.Rulesets.Mania.UI
                 throw new ArgumentException("Can't have zero or fewer stages.");
 
             GridContainer playfieldGrid;
-            InternalChild = playfieldGrid = new GridContainer
+            AddInternal(playfieldGrid = new GridContainer
             {
                 RelativeSizeAxes = Axes.Both,
                 Content = new[] { new Drawable[stageDefinitions.Count] }
-            };
+            });
 
             var normalColumnAction = ManiaAction.Key1;
             var specialColumnAction = ManiaAction.Special1;

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

@@ -0,0 +1,64 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System.IO;
+using System.Linq;
+using System.Text;
+using NUnit.Framework;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Tests.Beatmaps;
+using Decoder = osu.Game.Beatmaps.Formats.Decoder;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    [TestFixture]
+    public class StackingTest
+    {
+        [Test]
+        public void TestStacking()
+        {
+            using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(beatmap_data)))
+            using (var reader = new StreamReader(stream))
+            {
+                var beatmap = Decoder.GetDecoder<Beatmap>(reader).Decode(reader);
+                var converted = new TestWorkingBeatmap(beatmap).GetPlayableBeatmap(new OsuRuleset().RulesetInfo);
+
+                var objects = converted.HitObjects.ToList();
+
+                // The last hitobject triggers the stacking
+                for (int i = 0; i < objects.Count - 1; i++)
+                    Assert.AreEqual(0, ((OsuHitObject)objects[i]).StackHeight);
+            }
+        }
+
+        private const string beatmap_data = @"
+osu file format v14
+
+[General]
+StackLeniency: 0.2
+
+[Difficulty]
+ApproachRate:9.2
+SliderMultiplier:1
+SliderTickRate:0.5
+
+[TimingPoints]
+217871,6400,4,2,1,20,1,0
+217871,-800,4,2,1,20,0,0
+218071,-787.5,4,2,1,20,0,0
+218271,-775,4,2,1,20,0,0
+218471,-762.5,4,2,1,20,0,0
+218671,-750,4,2,1,20,0,0
+240271,-10,4,2,0,5,0,0
+
+[HitObjects]
+311,185,217871,6,0,L|318:158,1,25
+311,185,218071,2,0,L|335:170,1,25
+311,185,218271,2,0,L|338:192,1,25
+311,185,218471,2,0,L|325:209,1,25
+311,185,218671,2,0,L|304:212,1,25
+311,185,240271,5,0,0:0:0:0:
+";
+    }
+}

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

@@ -85,7 +85,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             }
         }
 
-        private class TestDrawableHitCircle : DrawableHitCircle
+        protected class TestDrawableHitCircle : DrawableHitCircle
         {
             private readonly bool auto;
 
@@ -94,6 +94,8 @@ namespace osu.Game.Rulesets.Osu.Tests
                 this.auto = auto;
             }
 
+            public void TriggerJudgement() => UpdateResult(true);
+
             protected override void CheckForResult(bool userTriggered, double timeOffset)
             {
                 if (auto && !userTriggered && timeOffset > 0)

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

@@ -0,0 +1,23 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Graphics;
+using osu.Framework.MathUtils;
+using osu.Game.Rulesets.Scoring;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseShaking : TestCaseHitCircle
+    {
+        public override void Add(Drawable drawable)
+        {
+            base.Add(drawable);
+
+            if (drawable is TestDrawableHitCircle hitObject)
+            {
+                Scheduler.AddDelayed(() => hitObject.TriggerJudgement(),
+                    hitObject.HitObject.StartTime - (hitObject.HitObject.HitWindows.HalfWindowFor(HitResult.Miss) + RNG.Next(0, 300)) - Time.Current);
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu/Beatmaps/OsuBeatmapProcessor.cs

@@ -15,9 +15,9 @@ namespace osu.Game.Rulesets.Osu.Beatmaps
         {
         }
 
-        public override void PreProcess()
+        public override void PostProcess()
         {
-            base.PreProcess();
+            base.PostProcess();
             applyStacking((Beatmap<OsuHitObject>)Beatmap);
         }
 

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

@@ -2,14 +2,88 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System;
+using System.Collections.Generic;
 using System.Linq;
 using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Rulesets.UI;
+using static osu.Game.Input.Handlers.ReplayInputHandler;
 
 namespace osu.Game.Rulesets.Osu.Mods
 {
-    public class OsuModRelax : ModRelax
+    public class OsuModRelax : ModRelax, IApplicableFailOverride, IUpdatableByPlayfield, IApplicableToRulesetContainer<OsuHitObject>
     {
         public override string Description => @"You don't need to click. Give your clicking/tapping fingers a break from the heat of things.";
         public override Type[] IncompatibleMods => base.IncompatibleMods.Append(typeof(OsuModAutopilot)).ToArray();
+
+        public bool AllowFail => false;
+
+        public void Update(Playfield playfield)
+        {
+            bool requiresHold = false;
+            bool requiresHit = false;
+
+            const float relax_leniency = 3;
+
+            foreach (var drawable in playfield.HitObjectContainer.AliveObjects)
+            {
+                if (!(drawable is DrawableOsuHitObject osuHit))
+                    continue;
+
+                double time = osuHit.Clock.CurrentTime;
+                double relativetime = time - osuHit.HitObject.StartTime;
+
+                if (time < osuHit.HitObject.StartTime - relax_leniency) continue;
+
+                if (osuHit.HitObject is IHasEndTime hasEnd && time > hasEnd.EndTime || osuHit.IsHit)
+                    continue;
+
+                requiresHit |= osuHit is DrawableHitCircle && osuHit.IsHovered && osuHit.HitObject.HitWindows.CanBeHit(relativetime);
+                requiresHold |= osuHit is DrawableSlider slider && (slider.Ball.IsHovered || osuHit.IsHovered) || osuHit is DrawableSpinner;
+            }
+
+            if (requiresHit)
+            {
+                addAction(false);
+                addAction(true);
+            }
+
+            addAction(requiresHold);
+        }
+
+        private bool wasHit;
+        private bool wasLeft;
+
+        private OsuInputManager osuInputManager;
+
+        private void addAction(bool hitting)
+        {
+            if (wasHit == hitting)
+                return;
+
+            wasHit = hitting;
+
+            var state = new ReplayState<OsuAction>
+            {
+                PressedActions = new List<OsuAction>()
+            };
+
+            if (hitting)
+            {
+                state.PressedActions.Add(wasLeft ? OsuAction.LeftButton : OsuAction.RightButton);
+                wasLeft = !wasLeft;
+            }
+
+            state.Apply(osuInputManager.CurrentState, osuInputManager);
+        }
+
+        public void ApplyToRulesetContainer(RulesetContainer<OsuHitObject> rulesetContainer)
+        {
+            // grab the input manager for future use.
+            osuInputManager = (OsuInputManager)rulesetContainer.KeyBindingInputManager;
+            osuInputManager.AllowUserPresses = false;
+        }
     }
 }

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

@@ -0,0 +1,53 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using System.Collections.Generic;
+using osu.Framework.Graphics;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Objects;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Mods
+{
+    internal class OsuModTransform : Mod, IApplicableToDrawableHitObjects
+    {
+        public override string Name => "Transform";
+        public override string ShortenedName => "TR";
+        public override FontAwesome Icon => FontAwesome.fa_arrows;
+        public override ModType Type => ModType.Fun;
+        public override string Description => "Everything rotates. EVERYTHING.";
+        public override double ScoreMultiplier => 1;
+        public override Type[] IncompatibleMods => new[] { typeof(OsuModWiggle) };
+
+        private float theta;
+
+        public void ApplyToDrawableHitObjects(IEnumerable<DrawableHitObject> drawables)
+        {
+            foreach (var drawable in drawables)
+            {
+                var hitObject = (OsuHitObject) drawable.HitObject;
+
+                float appearDistance = (float)(hitObject.TimePreempt - hitObject.TimeFadeIn) / 2;
+
+                Vector2 originalPosition = drawable.Position;
+                Vector2 appearOffset = new Vector2((float)Math.Cos(theta), (float)Math.Sin(theta)) * appearDistance;
+
+                //the - 1 and + 1 prevents the hit objects to appear in the wrong position.
+                double appearTime = hitObject.StartTime - hitObject.TimePreempt - 1;
+                double moveDuration = hitObject.TimePreempt + 1;
+
+                using (drawable.BeginAbsoluteSequence(appearTime, true))
+                {
+                    drawable
+                        .MoveToOffset(appearOffset)
+                        .MoveTo(originalPosition, moveDuration, Easing.InOutSine);
+                }
+
+                theta += (float) hitObject.TimeFadeIn / 1000;
+            }
+        }
+    }
+}

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

@@ -0,0 +1,67 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using System.Collections.Generic;
+using osu.Framework.Graphics;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Objects;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Mods
+{
+    internal class OsuModWiggle : Mod, IApplicableToDrawableHitObjects
+    {
+        public override string Name => "Wiggle";
+        public override string ShortenedName => "WG";
+        public override FontAwesome Icon => FontAwesome.fa_certificate;
+        public override ModType Type => ModType.Fun;
+        public override string Description => "They just won't stay still...";
+        public override double ScoreMultiplier => 1;
+        public override Type[] IncompatibleMods => new[] { typeof(OsuModTransform) };
+
+        private const int wiggle_duration = 90; // (ms) Higher = fewer wiggles
+        private const int wiggle_strength = 10; // Higher = stronger wiggles
+
+        public void ApplyToDrawableHitObjects(IEnumerable<DrawableHitObject> drawables)
+        {
+            foreach (var drawable in drawables)
+                drawable.ApplyCustomUpdateState += drawableOnApplyCustomUpdateState;
+        }
+
+        private void drawableOnApplyCustomUpdateState(DrawableHitObject drawable, ArmedState state)
+        {
+            var osuObject = (OsuHitObject)drawable.HitObject;
+            Vector2 origin = drawable.Position;
+
+            Random objRand = new Random((int)osuObject.StartTime);
+
+            // Wiggle all objects during TimePreempt
+            int amountWiggles = (int)osuObject.TimePreempt / wiggle_duration;
+
+            void wiggle()
+            {
+                float nextAngle = (float)(objRand.NextDouble() * 2 * Math.PI);
+                float nextDist = (float)(objRand.NextDouble() * wiggle_strength);
+                drawable.MoveTo(new Vector2((float)(nextDist * Math.Cos(nextAngle) + origin.X), (float)(nextDist * Math.Sin(nextAngle) + origin.Y)), wiggle_duration);
+            }
+
+            for (int i = 0; i < amountWiggles; i++)
+                using (drawable.BeginAbsoluteSequence(osuObject.StartTime - osuObject.TimePreempt + i * wiggle_duration, true))
+                    wiggle();
+
+            // Keep wiggling sliders and spinners for their duration
+            if (!(osuObject is IHasEndTime endTime))
+                return;
+
+            amountWiggles = (int)(endTime.Duration / wiggle_duration);
+
+            for (int i = 0; i < amountWiggles; i++)
+                using (drawable.BeginAbsoluteSequence(osuObject.StartTime + i * wiggle_duration, true))
+                    wiggle();
+        }
+    }
+}

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableHitCircle.cs

@@ -88,7 +88,10 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             var result = HitObject.HitWindows.ResultFor(timeOffset);
             if (result == HitResult.None)
+            {
+                Shake(Math.Abs(timeOffset) - HitObject.HitWindows.HalfWindowFor(HitResult.Miss));
                 return;
+            }
 
             ApplyResult(r => r.Type = result);
         }

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableOsuHitObject.cs

@@ -10,19 +10,29 @@ using osu.Game.Rulesets.Osu.Judgements;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Skinning;
 using OpenTK.Graphics;
+using osu.Game.Graphics.Containers;
 
 namespace osu.Game.Rulesets.Osu.Objects.Drawables
 {
     public class DrawableOsuHitObject : DrawableHitObject<OsuHitObject>
     {
-        public override bool IsPresent => base.IsPresent || State.Value == ArmedState.Idle && Time.Current >= HitObject.StartTime - HitObject.TimePreempt;
+        public override bool IsPresent => base.IsPresent || State.Value == ArmedState.Idle && Clock?.CurrentTime >= HitObject.StartTime - HitObject.TimePreempt;
+
+        private readonly ShakeContainer shakeContainer;
 
         protected DrawableOsuHitObject(OsuHitObject hitObject)
             : base(hitObject)
         {
+            base.AddInternal(shakeContainer = new ShakeContainer { RelativeSizeAxes = Axes.Both });
             Alpha = 0;
         }
 
+        // Forward all internal management to shakeContainer.
+        // This is a bit ugly but we don't have the concept of InternalContent so it'll have to do for now. (https://github.com/ppy/osu-framework/issues/1690)
+        protected override void AddInternal(Drawable drawable) => shakeContainer.Add(drawable);
+        protected override void ClearInternal(bool disposeChildren = true) => shakeContainer.Clear(disposeChildren);
+        protected override bool RemoveInternal(Drawable drawable) => shakeContainer.Remove(drawable);
+
         protected sealed override void UpdateState(ArmedState state)
         {
             double transformTime = HitObject.StartTime - HitObject.TimePreempt;
@@ -68,6 +78,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
         private OsuInputManager osuActionInputManager;
         internal OsuInputManager OsuActionInputManager => osuActionInputManager ?? (osuActionInputManager = GetContainingInputManager() as OsuInputManager);
 
+        protected virtual void Shake(double maximumLength) => shakeContainer.Shake(maximumLength);
+
         protected override JudgementResult CreateResult(Judgement judgement) => new OsuJudgementResult(judgement);
     }
 }

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSlider.cs

@@ -44,14 +44,17 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
                 },
                 ticks = new Container<DrawableSliderTick> { RelativeSizeAxes = Axes.Both },
                 repeatPoints = new Container<DrawableRepeatPoint> { RelativeSizeAxes = Axes.Both },
-                Ball = new SliderBall(s)
+                Ball = new SliderBall(s, this)
                 {
                     BypassAutoSizeAxes = Axes.Both,
                     Scale = new Vector2(s.Scale),
                     AlwaysPresent = true,
                     Alpha = 0
                 },
-                HeadCircle = new DrawableSliderHead(s, s.HeadCircle),
+                HeadCircle = new DrawableSliderHead(s, s.HeadCircle)
+                {
+                    OnShake = Shake
+                },
                 TailCircle = new DrawableSliderTail(s, s.TailCircle)
             };
 

osu.Game.Rulesets.Osu/Objects/Drawables/DrawableSliderHead.cs

@@ -1,6 +1,7 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using System;
 using osu.Game.Rulesets.Objects.Types;
 using OpenTK;
 
@@ -28,5 +29,9 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             if (!IsHit)
                 Position = slider.CurvePositionAt(completionProgress);
         }
+
+        public Action<double> OnShake;
+
+        protected override void Shake(double maximumLength) => OnShake?.Invoke(maximumLength);
     }
 }

osu.Game.Rulesets.Osu/Objects/Drawables/Pieces/SliderBall.cs

@@ -8,7 +8,6 @@ using osu.Framework.Graphics.Shapes;
 using osu.Framework.Input.EventArgs;
 using osu.Framework.Input.States;
 using osu.Game.Rulesets.Objects.Types;
-using OpenTK;
 using OpenTK.Graphics;
 using osu.Game.Skinning;
 
@@ -37,9 +36,11 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
         private readonly Slider slider;
         public readonly Drawable FollowCircle;
         private Drawable drawableBall;
+        private readonly DrawableSlider drawableSlider;
 
-        public SliderBall(Slider slider)
+        public SliderBall(Slider slider, DrawableSlider drawableSlider = null)
         {
+            this.drawableSlider = drawableSlider;
             this.slider = slider;
             Masking = true;
             AutoSizeAxes = Axes.Both;
@@ -121,9 +122,6 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
             return base.OnMouseMove(state);
         }
 
-        // If the current time is between the start and end of the slider, we should track mouse input regardless of the cursor position.
-        public override bool ReceiveMouseInputAt(Vector2 screenSpacePos) => canCurrentlyTrack || base.ReceiveMouseInputAt(screenSpacePos);
-
         public override void ClearTransformsAfter(double time, bool propagateChildren = false, string targetMember = null)
         {
             // Consider the case of rewinding - children's transforms are handled internally, so propagating down
@@ -158,8 +156,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
                 // Make sure to use the base version of ReceiveMouseInputAt so that we correctly check the position.
                 Tracking = canCurrentlyTrack
                            && lastState != null
-                           && base.ReceiveMouseInputAt(lastState.Mouse.NativeState.Position)
-                           && ((Parent as DrawableSlider)?.OsuActionInputManager?.PressedActions.Any(x => x == OsuAction.LeftButton || x == OsuAction.RightButton) ?? false);
+                           && ReceiveMouseInputAt(lastState.Mouse.NativeState.Position)
+                           && (drawableSlider?.OsuActionInputManager?.PressedActions.Any(x => x == OsuAction.LeftButton || x == OsuAction.RightButton) ?? false);
             }
         }
 

osu.Game.Rulesets.Osu/Objects/Drawables/Pieces/SliderBody.cs

@@ -7,14 +7,15 @@ using osu.Framework.Allocation;
 using osu.Framework.Configuration;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
-using osu.Framework.Graphics.OpenGL.Textures;
 using osu.Framework.Graphics.Lines;
 using osu.Framework.Graphics.Textures;
-using OpenTK;
 using OpenTK.Graphics.ES30;
 using OpenTK.Graphics;
 using osu.Framework.Graphics.Primitives;
 using osu.Game.Rulesets.Objects.Types;
+using OpenTK;
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.PixelFormats;
 
 namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
 {
@@ -43,6 +44,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
         public double? SnakedEnd { get; private set; }
 
         private Color4 accentColour = Color4.White;
+
         /// <summary>
         /// Used to colour the path.
         /// </summary>
@@ -61,6 +63,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
         }
 
         private Color4 borderColour = Color4.White;
+
         /// <summary>
         /// Used to colour the path border.
         /// </summary>
@@ -85,6 +88,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
         private Vector2 topLeftOffset;
 
         private readonly Slider slider;
+
         public SliderBody(Slider s)
         {
             slider = s;
@@ -139,8 +143,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
             var texture = new Texture(textureWidth, 1);
 
             //initialise background
-            var raw = new RawTexture(textureWidth, 1);
-            var bytes = raw.Data;
+            var raw = new Image<Rgba32>(textureWidth, 1);
 
             const float aa_portion = 0.02f;
             const float border_portion = 0.128f;
@@ -155,19 +158,13 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
 
                 if (progress <= border_portion)
                 {
-                    bytes[i * 4] = (byte)(BorderColour.R * 255);
-                    bytes[i * 4 + 1] = (byte)(BorderColour.G * 255);
-                    bytes[i * 4 + 2] = (byte)(BorderColour.B * 255);
-                    bytes[i * 4 + 3] = (byte)(Math.Min(progress / aa_portion, 1) * (BorderColour.A * 255));
+                    raw[i, 0] = new Rgba32(BorderColour.R, BorderColour.G, BorderColour.B, Math.Min(progress / aa_portion, 1) * BorderColour.A);
                 }
                 else
                 {
                     progress -= border_portion;
-
-                    bytes[i * 4] = (byte)(AccentColour.R * 255);
-                    bytes[i * 4 + 1] = (byte)(AccentColour.G * 255);
-                    bytes[i * 4 + 2] = (byte)(AccentColour.B * 255);
-                    bytes[i * 4 + 3] = (byte)((opacity_at_edge - (opacity_at_edge - opacity_at_centre) * progress / gradient_portion) * (AccentColour.A * 255));
+                    raw[i, 0] = new Rgba32(AccentColour.R, AccentColour.G, AccentColour.B,
+                        (opacity_at_edge - (opacity_at_edge - opacity_at_centre) * progress / gradient_portion) * AccentColour.A);
                 }
             }
 

osu.Game.Rulesets.Osu/OsuInputManager.cs

@@ -4,6 +4,8 @@
 using System.Collections.Generic;
 using System.ComponentModel;
 using osu.Framework.Input.Bindings;
+using osu.Framework.Input.EventArgs;
+using osu.Framework.Input.States;
 using osu.Game.Rulesets.UI;
 
 namespace osu.Game.Rulesets.Osu
@@ -12,8 +14,35 @@ namespace osu.Game.Rulesets.Osu
     {
         public IEnumerable<OsuAction> PressedActions => KeyBindingContainer.PressedActions;
 
-        public OsuInputManager(RulesetInfo ruleset) : base(ruleset, 0, SimultaneousBindingMode.Unique)
+        public bool AllowUserPresses
         {
+            set => ((OsuKeyBindingContainer)KeyBindingContainer).AllowUserPresses = value;
+        }
+
+        protected override RulesetKeyBindingContainer CreateKeyBindingContainer(RulesetInfo ruleset, int variant, SimultaneousBindingMode unique)
+            => new OsuKeyBindingContainer(ruleset, variant, unique);
+
+        public OsuInputManager(RulesetInfo ruleset)
+            : base(ruleset, 0, SimultaneousBindingMode.Unique)
+        {
+        }
+
+        private class OsuKeyBindingContainer : RulesetKeyBindingContainer
+        {
+            public bool AllowUserPresses = true;
+
+            public OsuKeyBindingContainer(RulesetInfo ruleset, int variant, SimultaneousBindingMode unique)
+                : base(ruleset, variant, unique)
+            {
+            }
+
+            protected override bool OnKeyDown(InputState state, KeyDownEventArgs args) => AllowUserPresses && base.OnKeyDown(state, args);
+            protected override bool OnKeyUp(InputState state, KeyUpEventArgs args) => AllowUserPresses && base.OnKeyUp(state, args);
+            protected override bool OnJoystickPress(InputState state, JoystickEventArgs args) => AllowUserPresses && base.OnJoystickPress(state, args);
+            protected override bool OnJoystickRelease(InputState state, JoystickEventArgs args) => AllowUserPresses && base.OnJoystickRelease(state, args);
+            protected override bool OnMouseDown(InputState state, MouseDownEventArgs args) => AllowUserPresses && base.OnMouseDown(state, args);
+            protected override bool OnMouseUp(InputState state, MouseUpEventArgs args) => AllowUserPresses && base.OnMouseUp(state, args);
+            protected override bool OnScroll(InputState state) => AllowUserPresses && base.OnScroll(state);
         }
     }
 
@@ -21,6 +50,7 @@ namespace osu.Game.Rulesets.Osu
     {
         [Description("Left Button")]
         LeftButton,
+
         [Description("Right Button")]
         RightButton
     }

osu.Game.Rulesets.Osu/OsuRuleset.cs

@@ -117,6 +117,11 @@ namespace osu.Game.Rulesets.Osu
                         new OsuModRelax(),
                         new OsuModAutopilot(),
                     };
+                case ModType.Fun:
+                    return new Mod[] {
+                        new OsuModTransform(),
+                        new OsuModWiggle(),
+                    };
                 default:
                     return new Mod[] { };
             }

osu.Game.Rulesets.Osu/UI/Cursor/CursorTrail.cs

@@ -216,7 +216,7 @@ namespace osu.Game.Rulesets.Osu.UI.Cursor
 
                         Texture.DrawQuad(
                             new Quad(pos.X - Size.X / 2, pos.Y - Size.Y / 2, Size.X, Size.Y),
-                            DrawInfo.Colour,
+                            DrawColourInfo.Colour,
                             null,
                             v => Shared.VertexBuffer.Vertices[end++] = new TexturedTrailVertex
                             {

osu.Game.Rulesets.Osu/UI/OsuPlayfield.cs

@@ -61,7 +61,7 @@ namespace osu.Game.Rulesets.Osu.UI
 
         public override void PostProcess()
         {
-            connectionLayer.HitObjects = HitObjects.Objects.Select(d => d.HitObject).OfType<OsuHitObject>();
+            connectionLayer.HitObjects = HitObjectContainer.Objects.Select(d => d.HitObject).OfType<OsuHitObject>();
         }
 
         private void onNewResult(DrawableHitObject judgedObject, JudgementResult result)

osu.Game.Rulesets.Taiko/Beatmaps/TaikoBeatmapConverter.cs

@@ -62,7 +62,7 @@ namespace osu.Game.Rulesets.Taiko.Beatmaps
                 converted.HitObjects = converted.HitObjects.GroupBy(t => t.StartTime).Select(x =>
                 {
                     TaikoHitObject first = x.First();
-                    if (x.Skip(1).Any())
+                    if (x.Skip(1).Any() && !(first is Swell))
                         first.IsStrong = true;
                     return first;
                 }).ToList();

osu.Game.Tests/Visual/TestCaseGameplayMenuOverlay.cs

@@ -8,14 +8,14 @@ using System.Linq;
 using OpenTK.Input;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics.Containers;
-using osu.Framework.Input.EventArgs;
 using osu.Framework.Logging;
 using osu.Game.Screens.Play;
+using OpenTK;
 
 namespace osu.Game.Tests.Visual
 {
     [Description("player pause/fail screens")]
-    public class TestCaseGameplayMenuOverlay : OsuTestCase
+    public class TestCaseGameplayMenuOverlay : ManualInputManagerTestCase
     {
         public override IReadOnlyList<Type> RequiredTypes => new[] { typeof(FailOverlay), typeof(PauseContainer) };
 
@@ -73,12 +73,18 @@ namespace osu.Game.Tests.Visual
         {
             AddStep("Show overlay", () => failOverlay.Show());
 
-            AddStep("Hover first button", () => failOverlay.Buttons.First().TriggerOnMouseMove(null));
+            AddStep("Hover first button", () => InputManager.MoveMouseTo(failOverlay.Buttons.First()));
             AddStep("Hide overlay", () => failOverlay.Hide());
 
             AddAssert("Overlay state is reset", () => !failOverlay.Buttons.Any(b => b.Selected));
         }
 
+        private void press(Key key)
+        {
+            InputManager.PressKey(key);
+            InputManager.ReleaseKey(key);
+        }
+
         /// <summary>
         /// Tests that pressing enter after an overlay shows doesn't trigger an event because a selection hasn't occurred.
         /// </summary>
@@ -86,7 +92,7 @@ namespace osu.Game.Tests.Visual
         {
             AddStep("Show overlay", () => pauseOverlay.Show());
 
-            AddStep("Press enter", () => pauseOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Enter }));
+            AddStep("Press enter", () => press(Key.Enter));
             AddAssert("Overlay still open", () => pauseOverlay.State == Visibility.Visible);
 
             AddStep("Hide overlay", () => pauseOverlay.Hide());
@@ -99,7 +105,7 @@ namespace osu.Game.Tests.Visual
         {
             AddStep("Show overlay", () => pauseOverlay.Show());
 
-            AddStep("Up arrow", () => pauseOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Up }));
+            AddStep("Up arrow", () => press(Key.Up));
             AddAssert("Last button selected", () => pauseOverlay.Buttons.Last().Selected);
 
             AddStep("Hide overlay", () => pauseOverlay.Hide());
@@ -112,7 +118,7 @@ namespace osu.Game.Tests.Visual
         {
             AddStep("Show overlay", () => pauseOverlay.Show());
 
-            AddStep("Down arrow", () => pauseOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Down }));
+            AddStep("Down arrow", () => press(Key.Down));
             AddAssert("First button selected", () => pauseOverlay.Buttons.First().Selected);
 
             AddStep("Hide overlay", () => pauseOverlay.Hide());
@@ -125,11 +131,11 @@ namespace osu.Game.Tests.Visual
         {
             AddStep("Show overlay", () => failOverlay.Show());
 
-            AddStep("Up arrow", () => failOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Up }));
+            AddStep("Up arrow", () => press(Key.Up));
             AddAssert("Last button selected", () => failOverlay.Buttons.Last().Selected);
-            AddStep("Up arrow", () => failOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Up }));
+            AddStep("Up arrow", () => press(Key.Up));
             AddAssert("First button selected", () => failOverlay.Buttons.First().Selected);
-            AddStep("Up arrow", () => failOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Up }));
+            AddStep("Up arrow", () => press(Key.Up));
             AddAssert("Last button selected", () => failOverlay.Buttons.Last().Selected);
 
             AddStep("Hide overlay", () => failOverlay.Hide());
@@ -142,11 +148,11 @@ namespace osu.Game.Tests.Visual
         {
             AddStep("Show overlay", () => failOverlay.Show());
 
-            AddStep("Down arrow", () => failOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Down }));
+            AddStep("Down arrow", () => press(Key.Down));
             AddAssert("First button selected", () => failOverlay.Buttons.First().Selected);
-            AddStep("Down arrow", () => failOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Down }));
+            AddStep("Down arrow", () => press(Key.Down));
             AddAssert("Last button selected", () => failOverlay.Buttons.Last().Selected);
-            AddStep("Down arrow", () => failOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Down }));
+            AddStep("Down arrow", () => press(Key.Down));
             AddAssert("First button selected", () => failOverlay.Buttons.First().Selected);
 
             AddStep("Hide overlay", () => failOverlay.Hide());
@@ -161,8 +167,8 @@ namespace osu.Game.Tests.Visual
 
             var secondButton = pauseOverlay.Buttons.Skip(1).First();
 
-            AddStep("Down arrow", () => pauseOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Down }));
-            AddStep("Hover second button", () => secondButton.TriggerOnMouseMove(null));
+            AddStep("Down arrow", () => press(Key.Down));
+            AddStep("Hover second button", () => InputManager.MoveMouseTo(secondButton));
             AddAssert("First button not selected", () => !pauseOverlay.Buttons.First().Selected);
             AddAssert("Second button selected", () => secondButton.Selected);
 
@@ -174,12 +180,16 @@ namespace osu.Game.Tests.Visual
         /// </summary>
         private void testKeySelectionAfterMouseSelection()
         {
-            AddStep("Show overlay", () => pauseOverlay.Show());
+            AddStep("Show overlay", () =>
+            {
+                pauseOverlay.Show();
+                InputManager.MoveMouseTo(Vector2.Zero);
+            });
 
             var secondButton = pauseOverlay.Buttons.Skip(1).First();
 
-            AddStep("Hover second button", () => secondButton.TriggerOnMouseMove(null));
-            AddStep("Up arrow", () => pauseOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Up }));
+            AddStep("Hover second button", () => InputManager.MoveMouseTo(secondButton));
+            AddStep("Up arrow", () => press(Key.Up));
             AddAssert("Second button not selected", () => !secondButton.Selected);
             AddAssert("First button selected", () => pauseOverlay.Buttons.First().Selected);
 
@@ -195,9 +205,9 @@ namespace osu.Game.Tests.Visual
 
             var secondButton = pauseOverlay.Buttons.Skip(1).First();
 
-            AddStep("Hover second button", () => secondButton.TriggerOnMouseMove(null));
-            AddStep("Unhover second button", () => secondButton.TriggerOnHoverLost(null));
-            AddStep("Down arrow", () => pauseOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Down }));
+            AddStep("Hover second button", () => InputManager.MoveMouseTo(secondButton));
+            AddStep("Unhover second button", () => InputManager.MoveMouseTo(Vector2.Zero));
+            AddStep("Down arrow", () => press(Key.Down));
             AddAssert("First button selected", () => pauseOverlay.Buttons.First().Selected); // Initial state condition
 
             AddStep("Hide overlay", () => pauseOverlay.Hide());
@@ -218,7 +228,7 @@ namespace osu.Game.Tests.Visual
                 var lastAction = pauseOverlay.OnRetry;
                 pauseOverlay.OnRetry = () => triggered = true;
 
-                retryButton.TriggerOnClick();
+                retryButton.Click();
                 pauseOverlay.OnRetry = lastAction;
             });
 
@@ -235,23 +245,28 @@ namespace osu.Game.Tests.Visual
 
             AddStep("Select second button", () =>
             {
-                pauseOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Down });
-                pauseOverlay.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Down });
+                press(Key.Down);
+                press(Key.Down);
             });
 
-            var retryButton = pauseOverlay.Buttons.Skip(1).First();
-
             bool triggered = false;
+            Action lastAction = null;
             AddStep("Press enter", () =>
             {
-                var lastAction = pauseOverlay.OnRetry;
+                lastAction = pauseOverlay.OnRetry;
                 pauseOverlay.OnRetry = () => triggered = true;
-
-                retryButton.TriggerOnKeyDown(null, new KeyDownEventArgs { Key = Key.Enter });
-                pauseOverlay.OnRetry = lastAction;
+                press(Key.Enter);
             });
 
-            AddAssert("Action was triggered", () => triggered);
+            AddAssert("Action was triggered", () =>
+            {
+                if (lastAction != null)
+                {
+                    pauseOverlay.OnRetry = lastAction;
+                    lastAction = null;
+                }
+                return triggered;
+            });
             AddAssert("Overlay is closed", () => pauseOverlay.State == Visibility.Hidden);
         }
     }

osu.Game.Tests/Visual/TestCaseKeyCounter.cs

@@ -1,32 +1,45 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using System;
+using System.Collections.Generic;
+using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Graphics;
 using osu.Framework.MathUtils;
+using osu.Framework.Timing;
 using osu.Game.Screens.Play;
 using OpenTK.Input;
 
 namespace osu.Game.Tests.Visual
 {
     [TestFixture]
-    public class TestCaseKeyCounter : OsuTestCase
+    public class TestCaseKeyCounter : ManualInputManagerTestCase
     {
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(KeyCounterKeyboard),
+            typeof(KeyCounterMouse),
+            typeof(KeyCounterCollection)
+        };
+
         public TestCaseKeyCounter()
         {
+            KeyCounterKeyboard rewindTestKeyCounterKeyboard;
             KeyCounterCollection kc = new KeyCounterCollection
             {
                 Origin = Anchor.Centre,
                 Anchor = Anchor.Centre,
                 Children = new KeyCounter[]
                 {
-                    new KeyCounterKeyboard(Key.Z),
+                    rewindTestKeyCounterKeyboard = new KeyCounterKeyboard(Key.X),
                     new KeyCounterKeyboard(Key.X),
                     new KeyCounterMouse(MouseButton.Left),
                     new KeyCounterMouse(MouseButton.Right),
                 },
             };
 
+
             AddStep("Add random", () =>
             {
                 Key key = (Key)((int)Key.A + RNG.Next(26));
@@ -34,7 +47,57 @@ namespace osu.Game.Tests.Visual
             });
             AddSliderStep("Fade time", 0, 200, 50, v => kc.FadeTime = v);
 
+            Key testKey = ((KeyCounterKeyboard)kc.Children.First()).Key;
+            double time1 = 0;
+
+            AddStep($"Press {testKey} key", () =>
+            {
+                InputManager.PressKey(testKey);
+                InputManager.ReleaseKey(testKey);
+            });
+
+            AddAssert($"Check {testKey} counter after keypress", () => rewindTestKeyCounterKeyboard.CountPresses == 1);
+
+            AddStep($"Press {testKey} key", () =>
+            {
+                InputManager.PressKey(testKey);
+                InputManager.ReleaseKey(testKey);
+                time1 = Clock.CurrentTime;
+            });
+
+            AddAssert($"Check {testKey} counter after keypress", () => rewindTestKeyCounterKeyboard.CountPresses == 2);
+
+            IFrameBasedClock oldClock = null;
+
+            AddStep($"Rewind {testKey} counter once", () =>
+            {
+                oldClock = rewindTestKeyCounterKeyboard.Clock;
+                rewindTestKeyCounterKeyboard.Clock = new FramedOffsetClock(new FixedClock(time1 - 10));
+            });
+
+            AddAssert($"Check {testKey} counter after rewind", () => rewindTestKeyCounterKeyboard.CountPresses == 1);
+
+            AddStep($"Rewind {testKey} counter to zero", () => rewindTestKeyCounterKeyboard.Clock = new FramedOffsetClock(new FixedClock(0)));
+
+            AddAssert($"Check {testKey} counter after rewind", () => rewindTestKeyCounterKeyboard.CountPresses == 0);
+
+            AddStep("Restore clock", () => rewindTestKeyCounterKeyboard.Clock = oldClock);
+
             Add(kc);
         }
+
+        private class FixedClock : IClock
+        {
+            private readonly double time;
+
+            public FixedClock(double time)
+            {
+                this.time = time;
+            }
+
+            public double CurrentTime => time;
+            public double Rate => 1;
+            public bool IsRunning => false;
+        }
     }
 }

osu.Game.Tests/Visual/TestCasePreviewTrackManager.cs

@@ -25,7 +25,7 @@ namespace osu.Game.Tests.Visual
         [BackgroundDependencyLoader]
         private void load()
         {
-            AddInternal(trackManager);
+            Add(trackManager);
         }
 
         [Test]
@@ -75,7 +75,7 @@ namespace osu.Game.Tests.Visual
             TestTrackOwner owner = null;
             PreviewTrack track = null;
 
-            AddStep("get track", () => AddInternal(owner = new TestTrackOwner(track = getTrack())));
+            AddStep("get track", () => Add(owner = new TestTrackOwner(track = getTrack())));
             AddStep("start", () => track.Start());
             AddStep("attempt stop", () => trackManager.StopAnyPlaying(this));
             AddAssert("not stopped", () => track.IsRunning);
@@ -89,7 +89,7 @@ namespace osu.Game.Tests.Visual
         {
             var track = getTrack();
 
-            AddInternal(track);
+            Add(track);
 
             return track;
         }

osu.Game/Beatmaps/BeatmapInfo.cs

@@ -27,13 +27,15 @@ namespace osu.Game.Beatmaps
         [JsonProperty("id")]
         public int? OnlineBeatmapID
         {
-            get { return onlineBeatmapID; }
-            set { onlineBeatmapID = value > 0 ? value : null; }
+            get => onlineBeatmapID;
+            set => onlineBeatmapID = value > 0 ? value : null;
         }
 
         [JsonIgnore]
         public int BeatmapSetInfoID { get; set; }
 
+        public BeatmapSetOnlineStatus Status { get; set; } = BeatmapSetOnlineStatus.None;
+
         [Required]
         public BeatmapSetInfo BeatmapSet { get; set; }
 
@@ -82,7 +84,7 @@ namespace osu.Game.Beatmaps
         [JsonIgnore]
         public string StoredBookmarks
         {
-            get { return string.Join(",", Bookmarks); }
+            get => string.Join(",", Bookmarks);
             set
             {
                 if (string.IsNullOrEmpty(value))
@@ -93,8 +95,7 @@ namespace osu.Game.Beatmaps
 
                 Bookmarks = value.Split(',').Select(v =>
                 {
-                    int val;
-                    bool result = int.TryParse(v, out val);
+                    bool result = int.TryParse(v, out int val);
                     return new { result, val };
                 }).Where(p => p.result).Select(p => p.val).ToArray();
             }

osu.Game/Beatmaps/BeatmapManager.cs

@@ -1,4 +1,4 @@
-// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System;
@@ -11,6 +11,7 @@ using Microsoft.EntityFrameworkCore;
 using osu.Framework.Audio;
 using osu.Framework.Audio.Track;
 using osu.Framework.Extensions;
+using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Graphics.Textures;
 using osu.Framework.Logging;
 using osu.Framework.Platform;
@@ -62,6 +63,8 @@ namespace osu.Game.Beatmaps
 
         public override string[] HandledExtensions => new[] { ".osz" };
 
+        protected override string ImportFromStablePath => "Songs";
+
         private readonly RulesetStore rulesets;
 
         private readonly BeatmapStore beatmaps;
@@ -72,11 +75,6 @@ namespace osu.Game.Beatmaps
 
         private readonly List<DownloadBeatmapSetRequest> currentDownloads = new List<DownloadBeatmapSetRequest>();
 
-        /// <summary>
-        /// Set a storage with access to an osu-stable install for import purposes.
-        /// </summary>
-        public Func<Storage> GetStableStorage { private get; set; }
-
         public BeatmapManager(Storage storage, IDatabaseContextFactory contextFactory, RulesetStore rulesets, APIAccess api, AudioManager audioManager, IIpcHost importHost = null)
             : base(storage, contextFactory, new BeatmapStore(contextFactory), importHost)
         {
@@ -103,6 +101,11 @@ namespace osu.Game.Beatmaps
                 b.BeatmapSet = beatmapSet;
             }
 
+            validateOnlineIds(beatmapSet.Beatmaps);
+
+            foreach (BeatmapInfo b in beatmapSet.Beatmaps)
+                fetchAndPopulateOnlineValues(b, beatmapSet.Beatmaps);
+
             // check if a set already exists with the same online id, delete if it does.
             if (beatmapSet.OnlineBeatmapSetID != null)
             {
@@ -114,11 +117,6 @@ namespace osu.Game.Beatmaps
                     Logger.Log($"Found existing beatmap set with same OnlineBeatmapSetID ({beatmapSet.OnlineBeatmapSetID}). It has been purged.", LoggingTarget.Database);
                 }
             }
-
-            validateOnlineIds(beatmapSet.Beatmaps);
-
-            foreach (BeatmapInfo b in beatmapSet.Beatmaps)
-                fetchAndPopulateOnlineIDs(b, beatmapSet.Beatmaps);
         }
 
         private void validateOnlineIds(List<BeatmapInfo> beatmaps)
@@ -195,7 +193,7 @@ namespace osu.Game.Beatmaps
 
                     downloadNotification.CompletionClickAction = () =>
                     {
-                        PresentBeatmap?.Invoke(importedBeatmap);
+                        PresentCompletedImport(importedBeatmap.Yield());
                         return true;
                     };
                     downloadNotification.State = ProgressNotificationState.Completed;
@@ -231,6 +229,12 @@ namespace osu.Game.Beatmaps
             BeatmapDownloadBegan?.Invoke(request);
         }
 
+        protected override void PresentCompletedImport(IEnumerable<BeatmapSetInfo> imported)
+        {
+            base.PresentCompletedImport(imported);
+            PresentBeatmap?.Invoke(imported.LastOrDefault());
+        }
+
         /// <summary>
         /// Get an existing download request if it exists.
         /// </summary>
@@ -311,27 +315,6 @@ namespace osu.Game.Beatmaps
         /// <returns>Results from the provided query.</returns>
         public IQueryable<BeatmapInfo> QueryBeatmaps(Expression<Func<BeatmapInfo, bool>> query) => beatmaps.Beatmaps.AsNoTracking().Where(query);
 
-        /// <summary>
-        /// Denotes whether an osu-stable installation is present to perform automated imports from.
-        /// </summary>
-        public bool StableInstallationAvailable => GetStableStorage?.Invoke() != null;
-
-        /// <summary>
-        /// This is a temporary method and will likely be replaced by a full-fledged (and more correctly placed) migration process in the future.
-        /// </summary>
-        public async Task ImportFromStable()
-        {
-            var stable = GetStableStorage?.Invoke();
-
-            if (stable == null)
-            {
-                Logger.Log("No osu!stable installation available!", LoggingTarget.Information, LogLevel.Error);
-                return;
-            }
-
-            await Task.Factory.StartNew(() => Import(stable.GetDirectories("Songs").Select(f => stable.GetFullPath(f)).ToArray()), TaskCreationOptions.LongRunning);
-        }
-
         /// <summary>
         /// Create a SHA-2 hash from the provided archive based on contained beatmap (.osu) file content.
         /// </summary>
@@ -350,7 +333,11 @@ namespace osu.Game.Beatmaps
         {
             // let's make sure there are actually .osu files to import.
             string mapName = reader.Filenames.FirstOrDefault(f => f.EndsWith(".osu"));
-            if (string.IsNullOrEmpty(mapName)) throw new InvalidOperationException("No beatmap files found in this beatmap archive.");
+            if (string.IsNullOrEmpty(mapName))
+            {
+                Logger.Log($"No beatmap files found in the beatmap archive ({reader.Name}).", LoggingTarget.Database);
+                return null;
+            }
 
             Beatmap beatmap;
             using (var stream = new StreamReader(reader.GetStream(mapName)))
@@ -401,21 +388,22 @@ namespace osu.Game.Beatmaps
         }
 
         /// <summary>
-        /// Query the API to populate mising OnlineBeatmapID / OnlineBeatmapSetID properties.
+        /// Query the API to populate missing values like OnlineBeatmapID / OnlineBeatmapSetID or (Rank-)Status.
         /// </summary>
         /// <param name="beatmap">The beatmap to populate.</param>
         /// <param name="otherBeatmaps">The other beatmaps contained within this set.</param>
         /// <param name="force">Whether to re-query if the provided beatmap already has populated values.</param>
         /// <returns>True if population was successful.</returns>
-        private bool fetchAndPopulateOnlineIDs(BeatmapInfo beatmap, IEnumerable<BeatmapInfo> otherBeatmaps, bool force = false)
+        private bool fetchAndPopulateOnlineValues(BeatmapInfo beatmap, IEnumerable<BeatmapInfo> otherBeatmaps, bool force = false)
         {
             if (api?.State != APIState.Online)
                 return false;
 
-            if (!force && beatmap.OnlineBeatmapID != null && beatmap.BeatmapSet.OnlineBeatmapSetID != null)
+            if (!force && beatmap.OnlineBeatmapID != null && beatmap.BeatmapSet.OnlineBeatmapSetID != null
+                && beatmap.Status != BeatmapSetOnlineStatus.None && beatmap.BeatmapSet.Status != BeatmapSetOnlineStatus.None)
                 return true;
 
-            Logger.Log("Attempting online lookup for IDs...", LoggingTarget.Database);
+            Logger.Log("Attempting online lookup for the missing values...", LoggingTarget.Database);
 
             try
             {
@@ -427,6 +415,9 @@ namespace osu.Game.Beatmaps
 
                 Logger.Log($"Successfully mapped to {res.OnlineBeatmapSetID} / {res.OnlineBeatmapID}.", LoggingTarget.Database);
 
+                beatmap.Status = res.Status;
+                beatmap.BeatmapSet.Status = res.BeatmapSet.Status;
+
                 if (otherBeatmaps.Any(b => b.OnlineBeatmapID == res.OnlineBeatmapID))
                 {
                     Logger.Log("Another beatmap in the same set already mapped to this ID. We'll skip adding it this time.", LoggingTarget.Database);
@@ -435,6 +426,7 @@ namespace osu.Game.Beatmaps
 
                 beatmap.BeatmapSet.OnlineBeatmapSetID = res.OnlineBeatmapSetID;
                 beatmap.OnlineBeatmapID = res.OnlineBeatmapID;
+
                 return true;
             }
             catch (Exception e)

osu.Game/Beatmaps/BeatmapManager_WorkingBeatmap.cs

@@ -10,7 +10,6 @@ using osu.Framework.Graphics.Textures;
 using osu.Framework.IO.Stores;
 using osu.Framework.Logging;
 using osu.Game.Beatmaps.Formats;
-using osu.Game.Graphics.Textures;
 using osu.Game.Skinning;
 using osu.Game.Storyboards;
 
@@ -45,6 +44,10 @@ namespace osu.Game.Beatmaps
 
             private string getPathForFile(string filename) => BeatmapSetInfo.Files.First(f => string.Equals(f.Filename, filename, StringComparison.InvariantCultureIgnoreCase)).FileInfo.StoragePath;
 
+            private LargeTextureStore textureStore;
+
+            protected override bool BackgroundStillValid(Texture b) => false; // bypass lazy logic. we want to return a new background each time for refcounting purposes.
+
             protected override Texture GetBackground()
             {
                 if (Metadata?.BackgroundFile == null)
@@ -52,7 +55,7 @@ namespace osu.Game.Beatmaps
 
                 try
                 {
-                    return new LargeTextureStore(new RawTextureLoaderStore(store)).Get(getPathForFile(Metadata.BackgroundFile));
+                    return (textureStore ?? (textureStore = new LargeTextureStore(new TextureLoaderStore(store)))).Get(getPathForFile(Metadata.BackgroundFile));
                 }
                 catch
                 {
@@ -73,6 +76,14 @@ namespace osu.Game.Beatmaps
                 }
             }
 
+            public override void TransferTo(WorkingBeatmap other)
+            {
+                base.TransferTo(other);
+
+                if (other is BeatmapManagerWorkingBeatmap owb && textureStore != null && BeatmapInfo.BackgroundEquals(other.BeatmapInfo))
+                    owb.textureStore = textureStore;
+            }
+
             protected override Waveform GetWaveform()
             {
                 try

osu.Game/Beatmaps/BeatmapProcessor.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System.Linq;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 
 namespace osu.Game.Beatmaps
@@ -44,6 +45,25 @@ namespace osu.Game.Beatmaps
 
         public virtual void PostProcess()
         {
+            void updateNestedCombo(HitObject obj, int comboIndex, int indexInCurrentCombo)
+            {
+                if (obj is IHasComboInformation objectComboInfo)
+                {
+                    objectComboInfo.ComboIndex = comboIndex;
+                    objectComboInfo.IndexInCurrentCombo = indexInCurrentCombo;
+                    foreach (var nestedObject in obj.NestedHitObjects)
+                        updateNestedCombo(nestedObject, comboIndex, indexInCurrentCombo);
+                }
+            }
+
+            foreach (var hitObject in Beatmap.HitObjects)
+            {
+                if (hitObject is IHasComboInformation objectComboInfo)
+                {
+                    foreach (var nested in hitObject.NestedHitObjects)
+                        updateNestedCombo(nested, objectComboInfo.ComboIndex, objectComboInfo.IndexInCurrentCombo);
+                }
+            }
         }
     }
 }

osu.Game/Beatmaps/BeatmapSetInfo.cs

@@ -17,10 +17,12 @@ namespace osu.Game.Beatmaps
 
         public int? OnlineBeatmapSetID
         {
-            get { return onlineBeatmapSetID; }
-            set { onlineBeatmapSetID = value > 0 ? value : null; }
+            get => onlineBeatmapSetID;
+            set => onlineBeatmapSetID = value > 0 ? value : null;
         }
 
+        public BeatmapSetOnlineStatus Status { get; set; } = BeatmapSetOnlineStatus.None;
+
         public BeatmapMetadata Metadata { get; set; }
 
         public List<BeatmapInfo> Beatmaps { get; set; }

osu.Game/Beatmaps/Drawables/BeatmapSetOnlineStatusPill.cs

@@ -1,7 +1,6 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-using System;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
@@ -14,20 +13,35 @@ namespace osu.Game.Beatmaps.Drawables
     {
         private readonly OsuSpriteText statusText;
 
-        private BeatmapSetOnlineStatus status = BeatmapSetOnlineStatus.None;
+        private BeatmapSetOnlineStatus status;
+
         public BeatmapSetOnlineStatus Status
         {
-            get { return status; }
+            get => status;
             set
             {
-                if (value == status) return;
+                if (status == value)
+                    return;
                 status = value;
 
-                statusText.Text = Enum.GetName(typeof(BeatmapSetOnlineStatus), Status)?.ToUpperInvariant();
+                Alpha = value == BeatmapSetOnlineStatus.None ? 0 : 1;
+                statusText.Text = value.ToString().ToUpperInvariant();
             }
         }
 
-        public BeatmapSetOnlineStatusPill(float textSize, MarginPadding textPadding)
+        public float TextSize
+        {
+            get => statusText.TextSize;
+            set => statusText.TextSize = value;
+        }
+
+        public MarginPadding TextPadding
+        {
+            get => statusText.Padding;
+            set => statusText.Padding = value;
+        }
+
+        public BeatmapSetOnlineStatusPill()
         {
             AutoSizeAxes = Axes.Both;
             Masking = true;
@@ -45,10 +59,10 @@ namespace osu.Game.Beatmaps.Drawables
                     Anchor = Anchor.Centre,
                     Origin = Anchor.Centre,
                     Font = @"Exo2.0-Bold",
-                    TextSize = textSize,
-                    Padding = textPadding,
                 },
             };
+
+            Status = BeatmapSetOnlineStatus.None;
         }
     }
 }

osu.Game/Beatmaps/Formats/Decoder.cs

@@ -55,11 +55,11 @@ namespace osu.Game.Beatmaps.Formats
             } while (line != null && line.Length == 0);
 
             if (line == null)
-                throw new IOException(@"Unknown file format");
+                throw new IOException(@"Unknown file format (null)");
 
-            var decoder = typedDecoders.Select(d => line.StartsWith(d.Key) ? d.Value : null).FirstOrDefault();
+            var decoder = typedDecoders.Select(d => line.StartsWith(d.Key, StringComparison.InvariantCulture) ? d.Value : null).FirstOrDefault();
             if (decoder == null)
-                throw new IOException(@"Unknown file format");
+                throw new IOException($@"Unknown file format ({line})");
 
             return (Decoder<T>)decoder.Invoke(line);
         }

osu.Game/Beatmaps/Formats/LegacyBeatmapDecoder.cs

@@ -408,11 +408,8 @@ namespace osu.Game.Beatmaps.Formats
                 parser = new Rulesets.Objects.Legacy.Osu.ConvertHitObjectParser(getOffsetTime(), FormatVersion);
 
             var obj = parser.Parse(line);
-
             if (obj != null)
-            {
                 beatmap.HitObjects.Add(obj);
-            }
         }
 
         private int getOffsetTime(int time) => time + (ApplyOffsets ? offset : 0);

osu.Game/Beatmaps/Formats/LegacyDecoder.cs

@@ -31,7 +31,7 @@ namespace osu.Game.Beatmaps.Formats
                 if (ShouldSkipLine(line))
                     continue;
 
-                if (line.StartsWith(@"[") && line.EndsWith(@"]"))
+                if (line.StartsWith(@"[", StringComparison.Ordinal) && line.EndsWith(@"]", StringComparison.Ordinal))
                 {
                     if (!Enum.TryParse(line.Substring(1, line.Length - 2), out section))
                     {
@@ -53,7 +53,7 @@ namespace osu.Game.Beatmaps.Formats
             }
         }
 
-        protected virtual bool ShouldSkipLine(string line) => string.IsNullOrWhiteSpace(line) || line.StartsWith("//");
+        protected virtual bool ShouldSkipLine(string line) => string.IsNullOrWhiteSpace(line) || line.StartsWith("//", StringComparison.Ordinal);
 
         protected virtual void ParseLine(T output, Section section, string line)
         {

osu.Game/Beatmaps/Formats/LegacyStoryboardDecoder.cs

@@ -60,7 +60,7 @@ namespace osu.Game.Beatmaps.Formats
         private void handleEvents(string line)
         {
             var depth = 0;
-            while (line.StartsWith(" ") || line.StartsWith("_"))
+            while (line.StartsWith(" ", StringComparison.Ordinal) || line.StartsWith("_", StringComparison.Ordinal))
             {
                 ++depth;
                 line = line.Substring(1);
@@ -269,9 +269,9 @@ namespace osu.Game.Beatmaps.Formats
                     return Anchor.BottomCentre;
                 case LegacyOrigins.BottomRight:
                     return Anchor.BottomRight;
+                default:
+                    return Anchor.TopLeft;
             }
-
-            throw new InvalidDataException($@"Unknown origin: {value}");
         }
 
         private void handleVariables(string line)

osu.Game/Beatmaps/WorkingBeatmap.cs

@@ -8,10 +8,10 @@ using osu.Game.Rulesets.Mods;
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Threading.Tasks;
 using osu.Game.Storyboards;
 using osu.Framework.IO.File;
 using System.IO;
+using System.Threading;
 using osu.Game.IO.Serialization;
 using osu.Game.Rulesets;
 using osu.Game.Rulesets.Objects;
@@ -38,12 +38,26 @@ namespace osu.Game.Beatmaps
 
             Mods.ValueChanged += mods => applyRateAdjustments();
 
-            beatmap = new AsyncLazy<IBeatmap>(populateBeatmap);
-            background = new AsyncLazy<Texture>(populateBackground, b => b == null || !b.IsDisposed);
-            track = new AsyncLazy<Track>(populateTrack);
-            waveform = new AsyncLazy<Waveform>(populateWaveform);
-            storyboard = new AsyncLazy<Storyboard>(populateStoryboard);
-            skin = new AsyncLazy<Skin>(populateSkin);
+            beatmap = new RecyclableLazy<IBeatmap>(() =>
+            {
+                var b = GetBeatmap() ?? new Beatmap();
+                // use the database-backed info.
+                b.BeatmapInfo = BeatmapInfo;
+                return b;
+            });
+
+            track = new RecyclableLazy<Track>(() =>
+            {
+                // we want to ensure that we always have a track, even if it's a fake one.
+                var t = GetTrack() ?? new VirtualBeatmapTrack(Beatmap);
+                applyRateAdjustments(t);
+                return t;
+            });
+
+            background = new RecyclableLazy<Texture>(GetBackground, BackgroundStillValid);
+            waveform = new RecyclableLazy<Waveform>(GetWaveform);
+            storyboard = new RecyclableLazy<Storyboard>(GetStoryboard);
+            skin = new RecyclableLazy<Skin>(GetSkin);
         }
 
         /// <summary>
@@ -58,28 +72,6 @@ namespace osu.Game.Beatmaps
             return path;
         }
 
-        protected abstract IBeatmap GetBeatmap();
-        protected abstract Texture GetBackground();
-        protected abstract Track GetTrack();
-        protected virtual Skin GetSkin() => new DefaultSkin();
-        protected virtual Waveform GetWaveform() => new Waveform();
-        protected virtual Storyboard GetStoryboard() => new Storyboard { BeatmapInfo = BeatmapInfo };
-
-        public bool BeatmapLoaded => beatmap.IsResultAvailable;
-        public IBeatmap Beatmap => beatmap.Value.Result;
-        public async Task<IBeatmap> GetBeatmapAsync() => await beatmap.Value;
-        private readonly AsyncLazy<IBeatmap> beatmap;
-
-        private IBeatmap populateBeatmap()
-        {
-            var b = GetBeatmap() ?? new Beatmap();
-
-            // use the database-backed info.
-            b.BeatmapInfo = BeatmapInfo;
-
-            return b;
-        }
-
         /// <summary>
         /// Constructs a playable <see cref="IBeatmap"/> from <see cref="Beatmap"/> using the applicable converters for a specific <see cref="RulesetInfo"/>.
         /// <para>
@@ -136,62 +128,53 @@ namespace osu.Game.Beatmaps
 
         public override string ToString() => BeatmapInfo.ToString();
 
-        public bool BackgroundLoaded => background.IsResultAvailable;
-        public Texture Background => background.Value.Result;
-        public async Task<Texture> GetBackgroundAsync() => await background.Value;
-        private AsyncLazy<Texture> background;
+        public bool BeatmapLoaded => beatmap.IsResultAvailable;
+        public IBeatmap Beatmap => beatmap.Value;
+        protected abstract IBeatmap GetBeatmap();
+        private readonly RecyclableLazy<IBeatmap> beatmap;
 
-        private Texture populateBackground() => GetBackground();
+        public bool BackgroundLoaded => background.IsResultAvailable;
+        public Texture Background => background.Value;
+        protected virtual bool BackgroundStillValid(Texture b) => b == null || b.Available;
+        protected abstract Texture GetBackground();
+        private readonly RecyclableLazy<Texture> background;
 
         public bool TrackLoaded => track.IsResultAvailable;
-        public Track Track => track.Value.Result;
-        public async Task<Track> GetTrackAsync() => await track.Value;
-        private AsyncLazy<Track> track;
-
-        private Track populateTrack()
-        {
-            // we want to ensure that we always have a track, even if it's a fake one.
-            var t = GetTrack() ?? new VirtualBeatmapTrack(Beatmap);
-            applyRateAdjustments(t);
-            return t;
-        }
+        public Track Track => track.Value;
+        protected abstract Track GetTrack();
+        private RecyclableLazy<Track> track;
 
         public bool WaveformLoaded => waveform.IsResultAvailable;
-        public Waveform Waveform => waveform.Value.Result;
-        public async Task<Waveform> GetWaveformAsync() => await waveform.Value;
-        private readonly AsyncLazy<Waveform> waveform;
-
-        private Waveform populateWaveform() => GetWaveform();
+        public Waveform Waveform => waveform.Value;
+        protected virtual Waveform GetWaveform() => new Waveform();
+        private readonly RecyclableLazy<Waveform> waveform;
 
         public bool StoryboardLoaded => storyboard.IsResultAvailable;
-        public Storyboard Storyboard => storyboard.Value.Result;
-        public async Task<Storyboard> GetStoryboardAsync() => await storyboard.Value;
-        private readonly AsyncLazy<Storyboard> storyboard;
-
-        private Storyboard populateStoryboard() => GetStoryboard();
+        public Storyboard Storyboard => storyboard.Value;
+        protected virtual Storyboard GetStoryboard() => new Storyboard { BeatmapInfo = BeatmapInfo };
+        private readonly RecyclableLazy<Storyboard> storyboard;
 
         public bool SkinLoaded => skin.IsResultAvailable;
-        public Skin Skin => skin.Value.Result;
-        public async Task<Skin> GetSkinAsync() => await skin.Value;
-        private readonly AsyncLazy<Skin> skin;
+        public Skin Skin => skin.Value;
+        protected virtual Skin GetSkin() => new DefaultSkin();
+        private readonly RecyclableLazy<Skin> skin;
 
-        private Skin populateSkin() => GetSkin();
-
-        public void TransferTo(WorkingBeatmap other)
+        /// <summary>
+        /// Transfer pieces of a beatmap to a new one, where possible, to save on loading.
+        /// </summary>
+        /// <param name="other">The new beatmap which is being switched to.</param>
+        public virtual void TransferTo(WorkingBeatmap other)
         {
             if (track.IsResultAvailable && Track != null && BeatmapInfo.AudioEquals(other.BeatmapInfo))
                 other.track = track;
-
-            if (background.IsResultAvailable && Background != null && BeatmapInfo.BackgroundEquals(other.BeatmapInfo))
-                other.background = background;
         }
 
         public virtual void Dispose()
         {
-            if (BackgroundLoaded) Background?.Dispose();
-            if (WaveformLoaded) Waveform?.Dispose();
-            if (StoryboardLoaded) Storyboard?.Dispose();
-            if (SkinLoaded) Skin?.Dispose();
+            background.Recycle();
+            waveform.Recycle();
+            storyboard.Recycle();
+            skin.Recycle();
         }
 
         /// <summary>
@@ -210,15 +193,15 @@ namespace osu.Game.Beatmaps
                 mod.ApplyToClock(t);
         }
 
-        public class AsyncLazy<T>
+        public class RecyclableLazy<T>
         {
-            private Lazy<Task<T>> lazy;
+            private Lazy<T> lazy;
             private readonly Func<T> valueFactory;
             private readonly Func<T, bool> stillValidFunction;
 
-            private readonly object initLock = new object();
+            private readonly object fetchLock = new object();
 
-            public AsyncLazy(Func<T> valueFactory, Func<T, bool> stillValidFunction = null)
+            public RecyclableLazy(Func<T> valueFactory, Func<T, bool> stillValidFunction = null)
             {
                 this.valueFactory = valueFactory;
                 this.stillValidFunction = stillValidFunction;
@@ -230,45 +213,28 @@ namespace osu.Game.Beatmaps
             {
                 if (!IsResultAvailable) return;
 
-                (lazy.Value.Result as IDisposable)?.Dispose();
+                (lazy.Value as IDisposable)?.Dispose();
                 recreate();
             }
 
-            public bool IsResultAvailable
+            public bool IsResultAvailable => stillValid;
+
+            public T Value
             {
                 get
                 {
-                    recreateIfInvalid();
-                    return lazy.Value.IsCompleted;
+                    lock (fetchLock)
+                    {
+                        if (!stillValid)
+                            recreate();
+                        return lazy.Value;
+                    }
                 }
             }
 
-            public Task<T> Value
-            {
-                get
-                {
-                    recreateIfInvalid();
-                    return lazy.Value;
-                }
-            }
+            private bool stillValid => lazy.IsValueCreated && (stillValidFunction?.Invoke(lazy.Value) ?? true);
 
-            private void recreateIfInvalid()
-            {
-                lock (initLock)
-                {
-                    if (!lazy.IsValueCreated || !lazy.Value.IsCompleted)
-                        // we have not yet been initialised or haven't run the task.
-                        return;
-
-                    if (stillValidFunction?.Invoke(lazy.Value.Result) ?? true)
-                        // we are still in a valid state.
-                        return;
-
-                    recreate();
-                }
-            }
-
-            private void recreate() => lazy = new Lazy<Task<T>>(() => Task.Run(valueFactory));
+            private void recreate() => lazy = new Lazy<T>(valueFactory, LazyThreadSafetyMode.ExecutionAndPublication);
         }
     }
 }

osu.Game/Database/ArchiveModelManager.cs

@@ -5,6 +5,7 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Threading.Tasks;
 using JetBrains.Annotations;
 using Microsoft.EntityFrameworkCore;
 using osu.Framework.IO.File;
@@ -58,7 +59,7 @@ namespace osu.Game.Database
         // ReSharper disable once NotAccessedField.Local (we should keep a reference to this so it is not finalised)
         private ArchiveImportIPCChannel ipc;
 
-        private readonly List<Action> cachedEvents = new List<Action>();
+        private readonly List<Action> queuedEvents = new List<Action>();
 
         /// <summary>
         /// Allows delaying of outwards events until an operation is confirmed (at a database level).
@@ -76,20 +77,26 @@ namespace osu.Game.Database
         /// <param name="perform">Whether the flushed events should be performed.</param>
         private void flushEvents(bool perform)
         {
+            Action[] events;
+            lock (queuedEvents)
+            {
+                events = queuedEvents.ToArray();
+                queuedEvents.Clear();
+            }
+
             if (perform)
             {
-                foreach (var a in cachedEvents)
+                foreach (var a in events)
                     a.Invoke();
             }
 
-            cachedEvents.Clear();
             delayingEvents = false;
         }
 
         private void handleEvent(Action a)
         {
             if (delayingEvents)
-                cachedEvents.Add(a);
+                lock (queuedEvents) queuedEvents.Add(a);
             else
                 a.Invoke();
         }
@@ -129,7 +136,6 @@ namespace osu.Game.Database
             List<TModel> imported = new List<TModel>();
 
             int current = 0;
-            int errors = 0;
             foreach (string path in paths)
             {
                 if (notification.State == ProgressNotificationState.Cancelled)
@@ -162,12 +168,29 @@ namespace osu.Game.Database
                 {
                     e = e.InnerException ?? e;
                     Logger.Error(e, $@"Could not import ({Path.GetFileName(path)})");
-                    errors++;
                 }
             }
 
-            notification.Text = errors > 0 ? $"Import complete with {errors} errors" : "Import successful!";
-            notification.State = ProgressNotificationState.Completed;
+            if (imported.Count == 0)
+            {
+                notification.Text = "Import failed!";
+                notification.State = ProgressNotificationState.Cancelled;
+            }
+            else
+            {
+                notification.CompletionText = $"Imported {current} {typeof(TModel).Name.Replace("Info", "").ToLower()}s!";
+                notification.CompletionClickAction += () =>
+                {
+                    if (imported.Count > 0)
+                        PresentCompletedImport(imported);
+                    return true;
+                };
+                notification.State = ProgressNotificationState.Completed;
+            }
+        }
+
+        protected virtual void PresentCompletedImport(IEnumerable<TModel> imported)
+        {
         }
 
         /// <summary>
@@ -178,7 +201,8 @@ namespace osu.Game.Database
         {
             try
             {
-                return Import(CreateModel(archive), archive);
+                var model = CreateModel(archive);
+                return model == null ? null : Import(model, archive);
             }
             catch (Exception e)
             {
@@ -282,7 +306,7 @@ namespace osu.Game.Database
             var notification = new ProgressNotification
             {
                 Progress = 0,
-                CompletionText = "Deleted all beatmaps!",
+                CompletionText = $"Deleted all {typeof(TModel).Name.Replace("Info", "").ToLower()}s!",
                 State = ProgressNotificationState.Active,
             };
 
@@ -384,12 +408,47 @@ namespace osu.Game.Database
             return fileInfos;
         }
 
+        #region osu-stable import
+
+        /// <summary>
+        /// Set a storage with access to an osu-stable install for import purposes.
+        /// </summary>
+        public Func<Storage> GetStableStorage { private get; set; }
+
+        /// <summary>
+        /// Denotes whether an osu-stable installation is present to perform automated imports from.
+        /// </summary>
+        public bool StableInstallationAvailable => GetStableStorage?.Invoke() != null;
+
+        /// <summary>
+        /// The relative path from osu-stable's data directory to import items from.
+        /// </summary>
+        protected virtual string ImportFromStablePath => null;
+
+        /// <summary>
+        /// This is a temporary method and will likely be replaced by a full-fledged (and more correctly placed) migration process in the future.
+        /// </summary>
+        public Task ImportFromStableAsync()
+        {
+            var stable = GetStableStorage?.Invoke();
+
+            if (stable == null)
+            {
+                Logger.Log("No osu!stable installation available!", LoggingTarget.Information, LogLevel.Error);
+                return Task.CompletedTask;
+            }
+
+            return Task.Factory.StartNew(() => Import(stable.GetDirectories(ImportFromStablePath).Select(f => stable.GetFullPath(f)).ToArray()), TaskCreationOptions.LongRunning);
+        }
+
+        #endregion
+
         /// <summary>
         /// Create a barebones model from the provided archive.
         /// Actual expensive population should be done in <see cref="Populate"/>; this should just prepare for duplicate checking.
         /// </summary>
         /// <param name="archive">The archive to create the model for.</param>
-        /// <returns>A model populated with minimal information.</returns>
+        /// <returns>A model populated with minimal information. Returning a null will abort importing silently.</returns>
         protected abstract TModel CreateModel(ArchiveReader archive);
 
         /// <summary>

osu.Game/Database/DatabaseContextFactory.cs

@@ -5,7 +5,6 @@ using System;
 using System.Linq;
 using System.Threading;
 using Microsoft.EntityFrameworkCore.Storage;
-using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Platform;
 
 namespace osu.Game.Database
@@ -118,7 +117,9 @@ namespace osu.Game.Database
 
         private void recycleThreadContexts()
         {
-            threadContexts?.Values.ForEach(c => c.Dispose());
+            // Contexts for other threads are not disposed as they may be in use elsewhere. Instead, fresh contexts are exposed
+            // for other threads to use, and we rely on the finalizer inside OsuDbContext to handle their previous contexts
+            threadContexts?.Value.Dispose();
             threadContexts = new ThreadLocal<OsuDbContext>(CreateContext, true);
         }
 

osu.Game/Database/OsuDbContext.cs

@@ -75,6 +75,13 @@ namespace osu.Game.Database
             }
         }
 
+        ~OsuDbContext()
+        {
+            // DbContext does not contain a finalizer (https://github.com/aspnet/EntityFrameworkCore/issues/8872)
+            // This is used to clean up previous contexts when fresh contexts are exposed via DatabaseContextFactory
+            Dispose();
+        }
+
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
         {
             base.OnConfiguring(optionsBuilder);

osu.Game/Graphics/Backgrounds/Background.cs

@@ -5,8 +5,8 @@ using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Sprites;
+using osu.Framework.Graphics.Textures;
 using OpenTK.Graphics;
-using osu.Game.Graphics.Textures;
 
 namespace osu.Game.Graphics.Backgrounds
 {

osu.Game/Graphics/Backgrounds/Triangles.cs

@@ -116,7 +116,7 @@ namespace osu.Game.Graphics.Backgrounds
 
             float adjustedAlpha = HideAlphaDiscrepancies ?
                 // Cubically scale alpha to make it drop off more sharply.
-                (float)Math.Pow(DrawInfo.Colour.AverageColour.Linear.A, 3) :
+                (float)Math.Pow(DrawColourInfo.Colour.AverageColour.Linear.A, 3) :
                 1;
 
             float elapsedSeconds = (float)Time.Elapsed / 1000;
@@ -235,7 +235,7 @@ namespace osu.Game.Graphics.Backgrounds
                         Vector2Extensions.Transform(particle.Position * Size + new Vector2(-offset.X, offset.Y), DrawInfo.Matrix)
                     );
 
-                    ColourInfo colourInfo = DrawInfo.Colour;
+                    ColourInfo colourInfo = DrawColourInfo.Colour;
                     colourInfo.ApplyChild(particle.Colour);
 
                     Texture.DrawTriangle(

osu.Game/Graphics/Containers/ShakeContainer.cs

@@ -0,0 +1,39 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+
+namespace osu.Game.Graphics.Containers
+{
+    /// <summary>
+    /// A container that adds the ability to shake its contents.
+    /// </summary>
+    public class ShakeContainer : Container
+    {
+        /// <summary>
+        /// Shake the contents of this container.
+        /// </summary>
+        /// <param name="maximumLength">The maximum length the shake should last.</param>
+        public void Shake(double maximumLength)
+        {
+            const float shake_amount = 8;
+            const float shake_duration = 30;
+
+            // if we don't have enough time, don't bother shaking.
+            if (maximumLength < shake_duration * 2)
+                return;
+
+            var sequence = this.MoveToX(shake_amount, shake_duration / 2, Easing.OutSine).Then()
+                               .MoveToX(-shake_amount, shake_duration, Easing.InOutSine).Then();
+
+            // if we don't have enough time for the second shake, skip it.
+            if (maximumLength > shake_duration * 4)
+                sequence = sequence
+                           .MoveToX(shake_amount, shake_duration, Easing.InOutSine).Then()
+                           .MoveToX(-shake_amount, shake_duration, Easing.InOutSine).Then();
+
+            sequence.MoveToX(0, shake_duration / 2, Easing.InSine);
+        }
+    }
+}

osu.Game/Graphics/DrawableDate.cs

@@ -4,7 +4,6 @@
 using System;
 using Humanizer;
 using osu.Framework.Allocation;
-using osu.Framework.Graphics;
 using osu.Framework.Graphics.Cursor;
 using osu.Game.Graphics.Sprites;
 
@@ -16,7 +15,6 @@ namespace osu.Game.Graphics
 
         public DrawableDate(DateTimeOffset date)
         {
-            AutoSizeAxes = Axes.Both;
             Font = "Exo2.0-RegularItalic";
 
             Date = date.ToLocalTime();

osu.Game/Graphics/ScreenshotManager.cs

@@ -71,7 +71,7 @@ namespace osu.Game.Graphics
 
         private volatile int screenShotTasks;
 
-        public async Task TakeScreenshotAsync() => await Task.Run(async () =>
+        public Task TakeScreenshotAsync() => Task.Run(async () =>
         {
             Interlocked.Increment(ref screenShotTasks);
 

osu.Game/Graphics/SpriteIcon.cs

@@ -71,7 +71,7 @@ namespace osu.Game.Graphics
 
             if (loadableIcon == loadedIcon) return;
 
-            var texture = store?.Get(((char)loadableIcon).ToString());
+            var texture = store.Get(((char)loadableIcon).ToString());
 
             spriteMain.Texture = texture;
             spriteShadow.Texture = texture;
@@ -95,7 +95,7 @@ namespace osu.Game.Graphics
             {
                 //adjust shadow alpha based on highest component intensity to avoid muddy display of darker text.
                 //squared result for quadratic fall-off seems to give the best result.
-                var avgColour = (Color4)DrawInfo.Colour.AverageColour;
+                var avgColour = (Color4)DrawColourInfo.Colour.AverageColour;
 
                 spriteShadow.Alpha = (float)Math.Pow(Math.Max(Math.Max(avgColour.R, avgColour.G), avgColour.B), 2);
 
@@ -129,7 +129,7 @@ namespace osu.Game.Graphics
                 if (icon == value) return;
 
                 icon = value;
-                if (IsLoaded)
+                if (LoadState == LoadState.Loaded)
                     updateTexture();
             }
         }

osu.Game/Graphics/Sprites/OsuSpriteText.cs

@@ -3,9 +3,6 @@
 
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Sprites;
-using osu.Framework.MathUtils;
-using OpenTK;
-using OpenTK.Graphics;
 using osu.Framework.Graphics.Transforms;
 
 namespace osu.Game.Graphics.Sprites
@@ -19,27 +16,6 @@ namespace osu.Game.Graphics.Sprites
             Shadow = true;
             TextSize = FONT_SIZE;
         }
-
-        protected override Drawable CreateFallbackCharacterDrawable()
-        {
-            var tex = GetTextureForCharacter('?');
-
-            if (tex != null)
-            {
-                float adjust = (RNG.NextSingle() - 0.5f) * 2;
-                return new Sprite
-                {
-                    Texture = tex,
-                    Origin = Anchor.Centre,
-                    Anchor = Anchor.Centre,
-                    Scale = new Vector2(1 + adjust * 0.2f),
-                    Rotation = adjust * 15,
-                    Colour = Color4.White,
-                };
-            }
-
-            return base.CreateFallbackCharacterDrawable();
-        }
     }
 
     public static class OsuSpriteTextTransformExtensions

osu.Game/Graphics/Textures/LargeTextureStore.cs

@@ -1,18 +0,0 @@
-// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
-// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
-
-using osu.Framework.Graphics.Textures;
-using osu.Framework.IO.Stores;
-
-namespace osu.Game.Graphics.Textures
-{
-    /// <summary>
-    /// A texture store that bypasses atlasing.
-    /// </summary>
-    public class LargeTextureStore : TextureStore
-    {
-        public LargeTextureStore(IResourceStore<RawTexture> store = null) : base(store, false)
-        {
-        }
-    }
-}

osu.Game/Graphics/UserInterface/OsuButton.cs

@@ -1,7 +1,16 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using osu.Framework.Allocation;
+using osu.Framework.Extensions.Color4Extensions;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Graphics.Sprites;
 using osu.Framework.Graphics.UserInterface;
+using osu.Framework.Input.EventArgs;
+using osu.Framework.Input.States;
+using osu.Game.Graphics.Sprites;
+using OpenTK.Graphics;
 
 namespace osu.Game.Graphics.UserInterface
 {
@@ -10,9 +19,73 @@ namespace osu.Game.Graphics.UserInterface
     /// </summary>
     public class OsuButton : Button
     {
+        private Box hover;
+
         public OsuButton()
         {
-            Add(new HoverClickSounds(HoverSampleSet.Loud));
+            Height = 40;
+
+            Content.Masking = true;
+            Content.CornerRadius = 5;
         }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            BackgroundColour = colours.BlueDark;
+
+            AddRange(new Drawable[]
+            {
+                hover = new Box
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Blending = BlendingMode.Additive,
+                    Colour = Color4.White.Opacity(0.1f),
+                    Alpha = 0,
+                    Depth = -1
+                },
+                new HoverClickSounds(HoverSampleSet.Loud),
+            });
+
+            Enabled.ValueChanged += enabled_ValueChanged;
+            Enabled.TriggerChange();
+        }
+
+        private void enabled_ValueChanged(bool enabled)
+        {
+            this.FadeColour(enabled ? Color4.White : Color4.Gray, 200, Easing.OutQuint);
+        }
+
+        protected override bool OnHover(InputState state)
+        {
+            hover.FadeIn(200);
+            return base.OnHover(state);
+        }
+
+        protected override void OnHoverLost(InputState state)
+        {
+            hover.FadeOut(200);
+            base.OnHoverLost(state);
+        }
+
+        protected override bool OnMouseDown(InputState state, MouseDownEventArgs args)
+        {
+            Content.ScaleTo(0.9f, 4000, Easing.OutQuint);
+            return base.OnMouseDown(state, args);
+        }
+
+        protected override bool OnMouseUp(InputState state, MouseUpEventArgs args)
+        {
+            Content.ScaleTo(1, 1000, Easing.OutElastic);
+            return base.OnMouseUp(state, args);
+        }
+
+        protected override SpriteText CreateText() => new OsuSpriteText
+        {
+            Depth = -1,
+            Origin = Anchor.Centre,
+            Anchor = Anchor.Centre,
+            Font = @"Exo2.0-Bold",
+        };
     }
 }

osu.Game/Graphics/UserInterface/TriangleButton.cs

@@ -2,17 +2,10 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System.Collections.Generic;
-using OpenTK.Graphics;
 using osu.Framework.Allocation;
-using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
-using osu.Framework.Graphics.Shapes;
-using osu.Framework.Graphics.Sprites;
-using osu.Framework.Input.EventArgs;
-using osu.Framework.Input.States;
 using osu.Game.Graphics.Backgrounds;
-using osu.Game.Graphics.Sprites;
 
 namespace osu.Game.Graphics.UserInterface
 {
@@ -21,79 +14,17 @@ namespace osu.Game.Graphics.UserInterface
     /// </summary>
     public class TriangleButton : OsuButton, IFilterable
     {
-        private Box hover;
-
-        protected Triangles Triangles;
-
-        public TriangleButton()
-        {
-            Height = 40;
-        }
-
-        protected override SpriteText CreateText() => new OsuSpriteText
-        {
-            Depth = -1,
-            Origin = Anchor.Centre,
-            Anchor = Anchor.Centre,
-            Font = @"Exo2.0-Bold",
-        };
+        protected Triangles Triangles { get; private set; }
 
         [BackgroundDependencyLoader]
         private void load(OsuColour colours)
         {
-            BackgroundColour = colours.BlueDark;
-
-            Content.Masking = true;
-            Content.CornerRadius = 5;
-
-            AddRange(new Drawable[]
+            Add(Triangles = new Triangles
             {
-                Triangles = new Triangles
-                {
-                    RelativeSizeAxes = Axes.Both,
-                    ColourDark = colours.BlueDarker,
-                    ColourLight = colours.Blue,
-                },
-                hover = new Box
-                {
-                    RelativeSizeAxes = Axes.Both,
-                    Blending = BlendingMode.Additive,
-                    Colour = Color4.White.Opacity(0.1f),
-                    Alpha = 0,
-                },
+                RelativeSizeAxes = Axes.Both,
+                ColourDark = colours.BlueDarker,
+                ColourLight = colours.Blue,
             });
-
-            Enabled.ValueChanged += enabled_ValueChanged;
-            Enabled.TriggerChange();
-        }
-
-        private void enabled_ValueChanged(bool enabled)
-        {
-            this.FadeColour(enabled ? Color4.White : Color4.Gray, 200, Easing.OutQuint);
-        }
-
-        protected override bool OnHover(InputState state)
-        {
-            hover.FadeIn(200);
-            return base.OnHover(state);
-        }
-
-        protected override void OnHoverLost(InputState state)
-        {
-            hover.FadeOut(200);
-            base.OnHoverLost(state);
-        }
-
-        protected override bool OnMouseDown(InputState state, MouseDownEventArgs args)
-        {
-            Content.ScaleTo(0.9f, 4000, Easing.OutQuint);
-            return base.OnMouseDown(state, args);
-        }
-
-        protected override bool OnMouseUp(InputState state, MouseUpEventArgs args)
-        {
-            Content.ScaleTo(1, 1000, Easing.OutElastic);
-            return base.OnMouseUp(state, args);
         }
 
         public IEnumerable<string> FilterTerms => new[] { Text };

osu.Game/IO/Archives/ArchiveReader.cs

@@ -3,6 +3,7 @@
 
 using System.Collections.Generic;
 using System.IO;
+using System.Threading.Tasks;
 using osu.Framework.IO.Stores;
 
 namespace osu.Game.IO.Archives
@@ -28,7 +29,9 @@ namespace osu.Game.IO.Archives
 
         public abstract IEnumerable<string> Filenames { get; }
 
-        public virtual byte[] Get(string name)
+        public virtual byte[] Get(string name) => GetAsync(name).Result;
+
+        public async Task<byte[]> GetAsync(string name)
         {
             using (Stream input = GetStream(name))
             {
@@ -36,7 +39,7 @@ namespace osu.Game.IO.Archives
                     return null;
 
                 byte[] buffer = new byte[input.Length];
-                input.Read(buffer, 0, buffer.Length);
+                await input.ReadAsync(buffer, 0, buffer.Length);
                 return buffer;
             }
         }

osu.Game/Input/Handlers/ReplayInputHandler.cs

@@ -3,10 +3,13 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using osu.Framework.Input.Handlers;
 using osu.Framework.Input.StateChanges;
+using osu.Framework.Input.StateChanges.Events;
 using osu.Framework.Input.States;
 using osu.Framework.Platform;
+using osu.Game.Rulesets.UI;
 using OpenTK;
 
 namespace osu.Game.Input.Handlers
@@ -40,7 +43,29 @@ namespace osu.Game.Input.Handlers
 
             public void Apply(InputState state, IInputStateChangeHandler handler)
             {
-                handler.HandleCustomInput(state, this);
+                if (!(state is RulesetInputManagerInputState<T> inputState))
+                    throw new InvalidOperationException($"{nameof(ReplayState<T>)} should only be applied to a {nameof(RulesetInputManagerInputState<T>)}");
+
+                var lastPressed = inputState.LastReplayState?.PressedActions ?? new List<T>();
+                var released = lastPressed.Except(PressedActions).ToArray();
+                var pressed = PressedActions.Except(lastPressed).ToArray();
+
+                inputState.LastReplayState = this;
+
+                handler.HandleInputStateChange(new ReplayStateChangeEvent<T>(state, this, released, pressed));
+            }
+        }
+
+        public class ReplayStateChangeEvent<T> : InputStateChangeEvent
+        {
+            public readonly T[] ReleasedActions;
+            public readonly T[] PressedActions;
+
+            public ReplayStateChangeEvent(InputState state, IInput input, T[] releasedActions, T[] pressedActions)
+                : base(state, input)
+            {
+                ReleasedActions = releasedActions;
+                PressedActions = pressedActions;
             }
         }
     }

osu.Game/Migrations/20180913080842_AddRankStatus.Designer.cs

@@ -0,0 +1,380 @@
+// <auto-generated />
+using System;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+using osu.Game.Database;
+
+namespace osu.Game.Migrations
+{
+    [DbContext(typeof(OsuDbContext))]
+    [Migration("20180913080842_AddRankStatus")]
+    partial class AddRankStatus
+    {
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "2.1.2-rtm-30932");
+
+            modelBuilder.Entity("osu.Game.Beatmaps.BeatmapDifficulty", b =>
+                {
+                    b.Property<int>("ID")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<float>("ApproachRate");
+
+                    b.Property<float>("CircleSize");
+
+                    b.Property<float>("DrainRate");
+
+                    b.Property<float>("OverallDifficulty");
+
+                    b.Property<double>("SliderMultiplier");
+
+                    b.Property<double>("SliderTickRate");
+
+                    b.HasKey("ID");
+
+                    b.ToTable("BeatmapDifficulty");
+                });
+
+            modelBuilder.Entity("osu.Game.Beatmaps.BeatmapInfo", b =>
+                {
+                    b.Property<int>("ID")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<int>("AudioLeadIn");
+
+                    b.Property<int>("BaseDifficultyID");
+
+                    b.Property<int>("BeatDivisor");
+
+                    b.Property<int>("BeatmapSetInfoID");
+
+                    b.Property<bool>("Countdown");
+
+                    b.Property<double>("DistanceSpacing");
+
+                    b.Property<int>("GridSize");
+
+                    b.Property<string>("Hash");
+
+                    b.Property<bool>("Hidden");
+
+                    b.Property<bool>("LetterboxInBreaks");
+
+                    b.Property<string>("MD5Hash");
+
+                    b.Property<int?>("MetadataID");
+
+                    b.Property<int?>("OnlineBeatmapID");
+
+                    b.Property<string>("Path");
+
+                    b.Property<int>("RulesetID");
+
+                    b.Property<bool>("SpecialStyle");
+
+                    b.Property<float>("StackLeniency");
+
+                    b.Property<double>("StarDifficulty");
+
+                    b.Property<int>("Status");
+
+                    b.Property<string>("StoredBookmarks");
+
+                    b.Property<double>("TimelineZoom");
+
+                    b.Property<string>("Version");
+
+                    b.Property<bool>("WidescreenStoryboard");
+
+                    b.HasKey("ID");
+
+                    b.HasIndex("BaseDifficultyID");
+
+                    b.HasIndex("BeatmapSetInfoID");
+
+                    b.HasIndex("Hash");
+
+                    b.HasIndex("MD5Hash");
+
+                    b.HasIndex("MetadataID");
+
+                    b.HasIndex("OnlineBeatmapID")
+                        .IsUnique();
+
+                    b.HasIndex("RulesetID");
+
+                    b.ToTable("BeatmapInfo");
+                });
+
+            modelBuilder.Entity("osu.Game.Beatmaps.BeatmapMetadata", b =>
+                {
+                    b.Property<int>("ID")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<string>("Artist");
+
+                    b.Property<string>("ArtistUnicode");
+
+                    b.Property<string>("AudioFile");
+
+                    b.Property<string>("AuthorString")
+                        .HasColumnName("Author");
+
+                    b.Property<string>("BackgroundFile");
+
+                    b.Property<int>("PreviewTime");
+
+                    b.Property<string>("Source");
+
+                    b.Property<string>("Tags");
+
+                    b.Property<string>("Title");
+
+                    b.Property<string>("TitleUnicode");
+
+                    b.HasKey("ID");
+
+                    b.ToTable("BeatmapMetadata");
+                });
+
+            modelBuilder.Entity("osu.Game.Beatmaps.BeatmapSetFileInfo", b =>
+                {
+                    b.Property<int>("ID")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<int>("BeatmapSetInfoID");
+
+                    b.Property<int>("FileInfoID");
+
+                    b.Property<string>("Filename")
+                        .IsRequired();
+
+                    b.HasKey("ID");
+
+                    b.HasIndex("BeatmapSetInfoID");
+
+                    b.HasIndex("FileInfoID");
+
+                    b.ToTable("BeatmapSetFileInfo");
+                });
+
+            modelBuilder.Entity("osu.Game.Beatmaps.BeatmapSetInfo", b =>
+                {
+                    b.Property<int>("ID")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<bool>("DeletePending");
+
+                    b.Property<string>("Hash");
+
+                    b.Property<int?>("MetadataID");
+
+                    b.Property<int?>("OnlineBeatmapSetID");
+
+                    b.Property<bool>("Protected");
+
+                    b.Property<int>("Status");
+
+                    b.HasKey("ID");
+
+                    b.HasIndex("DeletePending");
+
+                    b.HasIndex("Hash")
+                        .IsUnique();
+
+                    b.HasIndex("MetadataID");
+
+                    b.HasIndex("OnlineBeatmapSetID")
+                        .IsUnique();
+
+                    b.ToTable("BeatmapSetInfo");
+                });
+
+            modelBuilder.Entity("osu.Game.Configuration.DatabasedSetting", b =>
+                {
+                    b.Property<int>("ID")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<int>("IntKey")
+                        .HasColumnName("Key");
+
+                    b.Property<int?>("RulesetID");
+
+                    b.Property<string>("StringValue")
+                        .HasColumnName("Value");
+
+                    b.Property<int?>("Variant");
+
+                    b.HasKey("ID");
+
+                    b.HasIndex("RulesetID", "Variant");
+
+                    b.ToTable("Settings");
+                });
+
+            modelBuilder.Entity("osu.Game.Input.Bindings.DatabasedKeyBinding", b =>
+                {
+                    b.Property<int>("ID")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<int>("IntAction")
+                        .HasColumnName("Action");
+
+                    b.Property<string>("KeysString")
+                        .HasColumnName("Keys");
+
+                    b.Property<int?>("RulesetID");
+
+                    b.Property<int?>("Variant");
+
+                    b.HasKey("ID");
+
+                    b.HasIndex("IntAction");
+
+                    b.HasIndex("RulesetID", "Variant");
+
+                    b.ToTable("KeyBinding");
+                });
+
+            modelBuilder.Entity("osu.Game.IO.FileInfo", b =>
+                {
+                    b.Property<int>("ID")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<string>("Hash");
+
+                    b.Property<int>("ReferenceCount");
+
+                    b.HasKey("ID");
+
+                    b.HasIndex("Hash")
+                        .IsUnique();
+
+                    b.HasIndex("ReferenceCount");
+
+                    b.ToTable("FileInfo");
+                });
+
+            modelBuilder.Entity("osu.Game.Rulesets.RulesetInfo", b =>
+                {
+                    b.Property<int?>("ID")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<bool>("Available");
+
+                    b.Property<string>("InstantiationInfo");
+
+                    b.Property<string>("Name");
+
+                    b.Property<string>("ShortName");
+
+                    b.HasKey("ID");
+
+                    b.HasIndex("Available");
+
+                    b.HasIndex("ShortName")
+                        .IsUnique();
+
+                    b.ToTable("RulesetInfo");
+                });
+
+            modelBuilder.Entity("osu.Game.Skinning.SkinFileInfo", b =>
+                {
+                    b.Property<int>("ID")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<int>("FileInfoID");
+
+                    b.Property<string>("Filename")
+                        .IsRequired();
+
+                    b.Property<int>("SkinInfoID");
+
+                    b.HasKey("ID");
+
+                    b.HasIndex("FileInfoID");
+
+                    b.HasIndex("SkinInfoID");
+
+                    b.ToTable("SkinFileInfo");
+                });
+
+            modelBuilder.Entity("osu.Game.Skinning.SkinInfo", b =>
+                {
+                    b.Property<int>("ID")
+                        .ValueGeneratedOnAdd();
+
+                    b.Property<string>("Creator");
+
+                    b.Property<bool>("DeletePending");
+
+                    b.Property<string>("Name");
+
+                    b.HasKey("ID");
+
+                    b.ToTable("SkinInfo");
+                });
+
+            modelBuilder.Entity("osu.Game.Beatmaps.BeatmapInfo", b =>
+                {
+                    b.HasOne("osu.Game.Beatmaps.BeatmapDifficulty", "BaseDifficulty")
+                        .WithMany()
+                        .HasForeignKey("BaseDifficultyID")
+                        .OnDelete(DeleteBehavior.Cascade);
+
+                    b.HasOne("osu.Game.Beatmaps.BeatmapSetInfo", "BeatmapSet")
+                        .WithMany("Beatmaps")
+                        .HasForeignKey("BeatmapSetInfoID")
+                        .OnDelete(DeleteBehavior.Cascade);
+
+                    b.HasOne("osu.Game.Beatmaps.BeatmapMetadata", "Metadata")
+                        .WithMany("Beatmaps")
+                        .HasForeignKey("MetadataID");
+
+                    b.HasOne("osu.Game.Rulesets.RulesetInfo", "Ruleset")
+                        .WithMany()
+                        .HasForeignKey("RulesetID")
+                        .OnDelete(DeleteBehavior.Cascade);
+                });
+
+            modelBuilder.Entity("osu.Game.Beatmaps.BeatmapSetFileInfo", b =>
+                {
+                    b.HasOne("osu.Game.Beatmaps.BeatmapSetInfo")
+                        .WithMany("Files")
+                        .HasForeignKey("BeatmapSetInfoID")
+                        .OnDelete(DeleteBehavior.Cascade);
+
+                    b.HasOne("osu.Game.IO.FileInfo", "FileInfo")
+                        .WithMany()
+                        .HasForeignKey("FileInfoID")
+                        .OnDelete(DeleteBehavior.Cascade);
+                });
+
+            modelBuilder.Entity("osu.Game.Beatmaps.BeatmapSetInfo", b =>
+                {
+                    b.HasOne("osu.Game.Beatmaps.BeatmapMetadata", "Metadata")
+                        .WithMany("BeatmapSets")
+                        .HasForeignKey("MetadataID");
+                });
+
+            modelBuilder.Entity("osu.Game.Skinning.SkinFileInfo", b =>
+                {
+                    b.HasOne("osu.Game.IO.FileInfo", "FileInfo")
+                        .WithMany()
+                        .HasForeignKey("FileInfoID")
+                        .OnDelete(DeleteBehavior.Cascade);
+
+                    b.HasOne("osu.Game.Skinning.SkinInfo")
+                        .WithMany("Files")
+                        .HasForeignKey("SkinInfoID")
+                        .OnDelete(DeleteBehavior.Cascade);
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

osu.Game/Migrations/20180913080842_AddRankStatus.cs

@@ -0,0 +1,33 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+namespace osu.Game.Migrations
+{
+    public partial class AddRankStatus : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<int>(
+                name: "Status",
+                table: "BeatmapSetInfo",
+                nullable: false,
+                defaultValue: -3); // NONE
+
+            migrationBuilder.AddColumn<int>(
+                name: "Status",
+                table: "BeatmapInfo",
+                nullable: false,
+                defaultValue: -3); // NONE
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "Status",
+                table: "BeatmapSetInfo");
+
+            migrationBuilder.DropColumn(
+                name: "Status",
+                table: "BeatmapInfo");
+        }
+    }
+}

osu.Game/Migrations/OsuDbContextModelSnapshot.cs

@@ -1,7 +1,8 @@
 // <auto-generated />
-
+using System;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
 using osu.Game.Database;
 
 namespace osu.Game.Migrations
@@ -13,7 +14,7 @@ namespace osu.Game.Migrations
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "2.1.1-rtm-30846");
+                .HasAnnotation("ProductVersion", "2.1.2-rtm-30932");
 
             modelBuilder.Entity("osu.Game.Beatmaps.BeatmapDifficulty", b =>
                 {
@@ -78,6 +79,8 @@ namespace osu.Game.Migrations
 
                     b.Property<double>("StarDifficulty");
 
+                    b.Property<int>("Status");
+
                     b.Property<string>("StoredBookmarks");
 
                     b.Property<double>("TimelineZoom");
@@ -173,6 +176,8 @@ namespace osu.Game.Migrations
 
                     b.Property<bool>("Protected");
 
+                    b.Property<int>("Status");
+
                     b.HasKey("ID");
 
                     b.HasIndex("DeletePending");

osu.Game/Online/API/APIAccess.cs

@@ -2,12 +2,10 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System;
-using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.Net;
 using System.Threading;
-using System.Threading.Tasks;
 using osu.Framework.Configuration;
 using osu.Framework.Graphics;
 using osu.Framework.Logging;
@@ -26,7 +24,7 @@ namespace osu.Game.Online.API
         private const string client_id = @"5";
         private const string client_secret = @"FGc9GAtyHzeQDshWP5Ah7dega8hJACAJpQtw6OXk";
 
-        private ConcurrentQueue<APIRequest> queue = new ConcurrentQueue<APIRequest>();
+        private readonly Queue<APIRequest> queue = new Queue<APIRequest>();
 
         /// <summary>
         /// The username/email provided by the user when initiating a login.
@@ -55,7 +53,13 @@ namespace osu.Game.Online.API
             authentication.TokenString = config.Get<string>(OsuSetting.Token);
             authentication.Token.ValueChanged += onTokenChanged;
 
-            Task.Factory.StartNew(run, cancellationToken.Token, TaskCreationOptions.LongRunning, TaskScheduler.Default);
+            var thread = new Thread(run)
+            {
+                Name = "APIAccess",
+                IsBackground = true
+            };
+
+            thread.Start();
         }
 
         private void onTokenChanged(OAuthToken token) => config.Set(OsuSetting.Token, config.Get<bool>(OsuSetting.SavePassword) ? authentication.TokenString : string.Empty);
@@ -75,10 +79,7 @@ namespace osu.Game.Online.API
 
         public void Unregister(IOnlineComponent component)
         {
-            Scheduler.Add(delegate
-            {
-                components.Remove(component);
-            });
+            Scheduler.Add(delegate { components.Remove(component); });
         }
 
         public string AccessToken => authentication.RequestAccessToken();
@@ -103,6 +104,7 @@ namespace osu.Game.Online.API
                             log.Add(@"Queueing a ping request");
                             Queue(new ListChannelsRequest { Timeout = 5000 });
                         }
+
                         break;
                     case APIState.Offline:
                     case APIState.Connecting:
@@ -161,18 +163,21 @@ namespace osu.Game.Online.API
                     continue;
                 }
 
-                //process the request queue.
-                APIRequest req;
-                while (queue.TryPeek(out req))
+                while (true)
                 {
-                    if (handleRequest(req))
+                    APIRequest req;
+
+                    lock (queue)
                     {
-                        //we have succeeded, so let's unqueue.
-                        queue.TryDequeue(out req);
+                        if (queue.Count == 0) break;
+                        req = queue.Dequeue();
                     }
+
+                    // TODO: handle failures better
+                    handleRequest(req);
                 }
 
-                Thread.Sleep(1);
+                Thread.Sleep(50);
             }
         }
 
@@ -205,7 +210,8 @@ namespace osu.Game.Online.API
             }
             catch (WebException we)
             {
-                HttpStatusCode statusCode = (we.Response as HttpWebResponse)?.StatusCode ?? (we.Status == WebExceptionStatus.UnknownError ? HttpStatusCode.NotAcceptable : HttpStatusCode.RequestTimeout);
+                HttpStatusCode statusCode = (we.Response as HttpWebResponse)?.StatusCode
+                                            ?? (we.Status == WebExceptionStatus.UnknownError ? HttpStatusCode.NotAcceptable : HttpStatusCode.RequestTimeout);
 
                 // special cases for un-typed but useful message responses.
                 switch (we.Message)
@@ -247,6 +253,7 @@ namespace osu.Game.Online.API
         }
 
         private APIState state;
+
         public APIState State
         {
             get { return state; }
@@ -271,7 +278,10 @@ namespace osu.Game.Online.API
 
         public bool IsLoggedIn => LocalUser.Value.Id > 1;
 
-        public void Queue(APIRequest request) => queue.Enqueue(request);
+        public void Queue(APIRequest request)
+        {
+            lock (queue) queue.Enqueue(request);
+        }
 
         public event StateChangeDelegate OnStateChange;
 
@@ -279,16 +289,17 @@ namespace osu.Game.Online.API
 
         private void flushQueue(bool failOldRequests = true)
         {
-            var oldQueue = queue;
-
-            //flush the queue.
-            queue = new ConcurrentQueue<APIRequest>();
-
-            if (failOldRequests)
+            lock (queue)
             {
-                APIRequest req;
-                while (oldQueue.TryDequeue(out req))
-                    req.Fail(new WebException(@"Disconnected from server"));
+                var oldQueueRequests = queue.ToArray();
+
+                queue.Clear();
+
+                if (failOldRequests)
+                {
+                    foreach (var req in oldQueueRequests)
+                        req.Fail(new WebException(@"Disconnected from server"));
+                }
             }
         }
 

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

@@ -15,6 +15,12 @@ namespace osu.Game.Online.API.Requests.Responses
         [JsonProperty(@"beatmapset_id")]
         public int OnlineBeatmapSetID { get; set; }
 
+        [JsonProperty(@"status")]
+        public BeatmapSetOnlineStatus Status { get; set; }
+
+        [JsonProperty(@"beatmapset")]
+        public APIBeatmapSet BeatmapSet { get; set; }
+
         [JsonProperty(@"playcount")]
         private int playCount { get; set; }
 
@@ -59,11 +65,13 @@ namespace osu.Game.Online.API.Requests.Responses
                 Ruleset = rulesets.GetRuleset(ruleset),
                 StarDifficulty = starDifficulty,
                 OnlineBeatmapID = OnlineBeatmapID,
+                Version = version,
+                Status = Status,
                 BeatmapSet = new BeatmapSetInfo
                 {
                     OnlineBeatmapSetID = OnlineBeatmapSetID,
+                    Status = BeatmapSet?.Status ?? BeatmapSetOnlineStatus.None
                 },
-                Version = version,
                 BaseDifficulty = new BeatmapDifficulty
                 {
                     DrainRate = drainRate,

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

@@ -20,10 +20,13 @@ namespace osu.Game.Online.API.Requests.Responses
         [JsonProperty(@"id")]
         public int? OnlineBeatmapSetID
         {
-            get { return onlineBeatmapSetID; }
-            set { onlineBeatmapSetID = value > 0 ? value : null; }
+            get => onlineBeatmapSetID;
+            set => onlineBeatmapSetID = value > 0 ? value : null;
         }
 
+        [JsonProperty(@"status")]
+        public BeatmapSetOnlineStatus Status { get; set; }
+
         [JsonProperty(@"preview_url")]
         private string preview { get; set; }
 
@@ -42,9 +45,6 @@ namespace osu.Game.Online.API.Requests.Responses
         [JsonProperty(@"storyboard")]
         private bool hasStoryboard { get; set; }
 
-        [JsonProperty(@"status")]
-        private BeatmapSetOnlineStatus status { get; set; }
-
         [JsonProperty(@"submitted_date")]
         private DateTimeOffset submitted { get; set; }
 
@@ -57,7 +57,7 @@ namespace osu.Game.Online.API.Requests.Responses
         [JsonProperty(@"user_id")]
         private long creatorId
         {
-            set { Author.Id = value; }
+            set => Author.Id = value;
         }
 
         [JsonProperty(@"beatmaps")]
@@ -69,6 +69,7 @@ namespace osu.Game.Online.API.Requests.Responses
             {
                 OnlineBeatmapSetID = OnlineBeatmapSetID,
                 Metadata = this,
+                Status = Status,
                 OnlineInfo = new BeatmapSetOnlineInfo
                 {
                     Covers = covers,
@@ -76,7 +77,7 @@ namespace osu.Game.Online.API.Requests.Responses
                     PlayCount = playCount,
                     FavouriteCount = favouriteCount,
                     BPM = bpm,
-                    Status = status,
+                    Status = Status,
                     HasVideo = hasVideo,
                     HasStoryboard = hasStoryboard,
                     Submitted = submitted,

osu.Game/Online/Chat/InfoMessage.cs

@@ -15,11 +15,7 @@ namespace osu.Game.Online.Chat
             Timestamp = DateTimeOffset.Now;
             Content = message;
 
-            Sender = new User
-            {
-                Username = @"system",
-                Colour = @"0000ff",
-            };
+            Sender = User.SYSTEM_USER;
         }
     }
 }

osu.Game/OsuGame.cs

@@ -75,10 +75,10 @@ namespace osu.Game
         {
             get
             {
-                Screen s = screenStack;
-                while (s != null && !(s is Intro))
-                    s = s.ChildScreen;
-                return s as Intro;
+                Screen screen = screenStack;
+                while (screen != null && !(screen is Intro))
+                    screen = screen.ChildScreen;
+                return screen as Intro;
             }
         }
 
@@ -126,8 +126,8 @@ namespace osu.Game
         /// <param name="toolbar">Whether the toolbar should also be hidden.</param>
         public void CloseAllOverlays(bool toolbar = true)
         {
-            foreach (var o in overlays)
-                o.State = Visibility.Hidden;
+            foreach (var overlay in overlays)
+                overlay.State = Visibility.Hidden;
             if (toolbar) Toolbar.State = Visibility.Hidden;
         }
 
@@ -244,7 +244,7 @@ namespace osu.Game
         /// <param name="beatmapId">The beatmap to show.</param>
         public void ShowBeatmap(int beatmapId) => beatmapSetOverlay.FetchAndShowBeatmap(beatmapId);
 
-        protected void LoadScore(Score s)
+        protected void LoadScore(Score score)
         {
             scoreLoad?.Cancel();
 
@@ -252,18 +252,18 @@ namespace osu.Game
 
             if (menu == null)
             {
-                scoreLoad = Schedule(() => LoadScore(s));
+                scoreLoad = Schedule(() => LoadScore(score));
                 return;
             }
 
             if (!menu.IsCurrentScreen)
             {
                 menu.MakeCurrent();
-                this.Delay(500).Schedule(() => LoadScore(s), out scoreLoad);
+                this.Delay(500).Schedule(() => LoadScore(score), out scoreLoad);
                 return;
             }
 
-            if (s.Beatmap == null)
+            if (score.Beatmap == null)
             {
                 notifications.Post(new SimpleNotification
                 {
@@ -273,12 +273,12 @@ namespace osu.Game
                 return;
             }
 
-            ruleset.Value = s.Ruleset;
+            ruleset.Value = score.Ruleset;
 
-            Beatmap.Value = BeatmapManager.GetWorkingBeatmap(s.Beatmap);
-            Beatmap.Value.Mods.Value = s.Mods;
+            Beatmap.Value = BeatmapManager.GetWorkingBeatmap(score.Beatmap);
+            Beatmap.Value.Mods.Value = score.Mods;
 
-            menu.Push(new PlayerLoader(new ReplayPlayer(s.Replay)));
+            menu.Push(new PlayerLoader(new ReplayPlayer(score.Replay)));
         }
 
         protected override void Dispose(bool isDisposing)
@@ -299,11 +299,13 @@ namespace osu.Game
             // This prevents the cursor from showing until we have a screen with CursorVisible = true
             MenuCursorContainer.CanShowCursor = currentScreen?.CursorVisible ?? false;
 
-            // hook up notifications to components.
+            // todo: all archive managers should be able to be looped here.
             SkinManager.PostNotification = n => notifications?.Post(n);
-            BeatmapManager.PostNotification = n => notifications?.Post(n);
+            SkinManager.GetStableStorage = GetStorageForStableInstall;
 
+            BeatmapManager.PostNotification = n => notifications?.Post(n);
             BeatmapManager.GetStableStorage = GetStorageForStableInstall;
+
             BeatmapManager.PresentBeatmap = PresentBeatmap;
 
             AddRange(new Drawable[]
@@ -353,7 +355,7 @@ namespace osu.Game
             loadComponentSingleFile(beatmapSetOverlay = new BeatmapSetOverlay { Depth = -3 }, mainContent.Add);
             loadComponentSingleFile(musicController = new MusicController
             {
-                Depth = -4,
+                Depth = -5,
                 Position = new Vector2(0, Toolbar.HEIGHT),
                 Anchor = Anchor.TopRight,
                 Origin = Anchor.TopRight,
@@ -504,7 +506,27 @@ namespace osu.Game
             // schedule is here to ensure that all component loads are done after LoadComplete is run (and thus all dependencies are cached).
             // with some better organisation of LoadComplete to do construction and dependency caching in one step, followed by calls to loadComponentSingleFile,
             // we could avoid the need for scheduling altogether.
-            Schedule(() => { asyncLoadStream = asyncLoadStream?.ContinueWith(t => LoadComponentAsync(d, add).Wait()) ?? LoadComponentAsync(d, add); });
+            Schedule(() =>
+            {
+                var previousLoadStream = asyncLoadStream;
+
+                //chain with existing load stream
+                asyncLoadStream = Task.Run(async () =>
+                {
+                    if (previousLoadStream != null)
+                        await previousLoadStream;
+
+                    try
+                    {
+                        Logger.Log($"Loading {d}...", LoggingTarget.Debug);
+                        await LoadComponentAsync(d, add);
+                        Logger.Log($"Loaded {d}!", LoggingTarget.Debug);
+                    }
+                    catch (OperationCanceledException)
+                    {
+                    }
+                });
+            });
         }
 
         public bool OnPressed(GlobalAction action)

osu.Game/OsuGameBase.cs

@@ -24,7 +24,6 @@ using osu.Framework.Input;
 using osu.Framework.Logging;
 using osu.Game.Audio;
 using osu.Game.Database;
-using osu.Game.Graphics.Textures;
 using osu.Game.Input;
 using osu.Game.Input.Bindings;
 using osu.Game.IO;
@@ -109,11 +108,39 @@ namespace osu.Game
 
             dependencies.Cache(contextFactory = new DatabaseContextFactory(Host.Storage));
 
-            dependencies.Cache(new LargeTextureStore(new RawTextureLoaderStore(new NamespacedResourceStore<byte[]>(Resources, @"Textures"))));
+            var largeStore = new LargeTextureStore(new TextureLoaderStore(new NamespacedResourceStore<byte[]>(Resources, @"Textures")));
+            largeStore.AddStore(new TextureLoaderStore(new OnlineStore()));
+            dependencies.Cache(largeStore);
 
             dependencies.CacheAs(this);
             dependencies.Cache(LocalConfig);
 
+            //this completely overrides the framework default. will need to change once we make a proper FontStore.
+            dependencies.Cache(Fonts = new FontStore(new GlyphStore(Resources, @"Fonts/FontAwesome")));
+
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/osuFont"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-Medium"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-MediumItalic"));
+
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Noto-Basic"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Noto-Hangul"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Noto-CJK-Basic"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Noto-CJK-Compatibility"));
+
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-Regular"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-RegularItalic"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-SemiBold"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-SemiBoldItalic"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-Bold"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-BoldItalic"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-Light"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-LightItalic"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-Black"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-BlackItalic"));
+
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Venera"));
+            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Venera-Light"));
+
             runMigrations();
 
             dependencies.Cache(SkinManager = new SkinManager(Host.Storage, contextFactory, Host, Audio));
@@ -137,33 +164,6 @@ namespace osu.Game
             fileImporters.Add(ScoreStore);
             fileImporters.Add(SkinManager);
 
-            //this completely overrides the framework default. will need to change once we make a proper FontStore.
-            dependencies.Cache(Fonts = new FontStore { ScaleAdjust = 100 });
-
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/FontAwesome"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/osuFont"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-Medium"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-MediumItalic"));
-
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Noto-Basic"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Noto-Hangul"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Noto-CJK-Basic"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Noto-CJK-Compatibility"));
-
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-Regular"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-RegularItalic"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-SemiBold"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-SemiBoldItalic"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-Bold"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-BoldItalic"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-Light"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-LightItalic"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-Black"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Exo2.0-BlackItalic"));
-
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Venera"));
-            Fonts.AddStore(new GlyphStore(Resources, @"Fonts/Venera-Light"));
-
             var defaultBeatmap = new DummyWorkingBeatmap(this);
             beatmap = new OsuBindableBeatmap(defaultBeatmap, Audio);
             BeatmapManager.DefaultBeatmap = defaultBeatmap;

osu.Game/Overlays/BeatmapSet/Buttons/PreviewButton.cs

@@ -66,7 +66,7 @@ namespace osu.Game.Overlays.BeatmapSet.Buttons
                 },
             };
 
-            Action = () => playButton.TriggerOnClick();
+            Action = () => playButton.Click();
             Playing.ValueChanged += newValue => progress.FadeTo(newValue ? 1 : 0, 100);
         }
 

osu.Game/Overlays/BeatmapSet/Header.cs

@@ -230,10 +230,12 @@ namespace osu.Game.Overlays.BeatmapSet
                             Spacing = new Vector2(10),
                             Children = new Drawable[]
                             {
-                                onlineStatusPill = new BeatmapSetOnlineStatusPill(14, new MarginPadding { Horizontal = 25, Vertical = 8 })
+                                onlineStatusPill = new BeatmapSetOnlineStatusPill
                                 {
                                     Anchor = Anchor.TopRight,
                                     Origin = Anchor.TopRight,
+                                    TextSize = 14,
+                                    TextPadding = new MarginPadding { Horizontal = 25, Vertical = 8 }
                                 },
                                 Details = new Details(),
                             },

osu.Game/Overlays/BeatmapSet/Scores/ScoresContainer.cs

@@ -62,7 +62,7 @@ namespace osu.Game.Overlays.BeatmapSet.Scores
                 loading = true;
 
                 getScoresRequest = new GetScoresRequest(beatmap, beatmap.Ruleset);
-                getScoresRequest.Success += r => Scores = r.Scores;
+                getScoresRequest.Success += r => Schedule(() => Scores = r.Scores);
                 api.Queue(getScoresRequest);
             }
         }
@@ -134,5 +134,10 @@ namespace osu.Game.Overlays.BeatmapSet.Scores
             this.api = api;
             updateDisplay();
         }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            getScoresRequest?.Cancel();
+        }
     }
 }

osu.Game/Overlays/Chat/ChatTabControl.cs

@@ -13,6 +13,7 @@ using osu.Game.Graphics.Sprites;
 using osu.Game.Graphics.UserInterface;
 using osu.Game.Online.Chat;
 using OpenTK;
+using OpenTK.Input;
 using OpenTK.Graphics;
 using osu.Framework.Configuration;
 using System;
@@ -143,6 +144,17 @@ namespace osu.Game.Overlays.Chat
                 textBold.FadeOut(transition_length, Easing.OutQuint);
             }
 
+            protected override bool OnMouseUp(InputState state, MouseUpEventArgs args)
+            {
+                if (args.Button == MouseButton.Middle)
+                {
+                    closeButton.Action();
+                    return true;
+                }
+
+                return false;
+            }
+
             protected override bool OnHover(InputState state)
             {
                 if (IsRemovable)

osu.Game/Overlays/Dialog/PopupDialog.cs

@@ -199,7 +199,7 @@ namespace osu.Game.Overlays.Dialog
             switch (action)
             {
                 case GlobalAction.Select:
-                    Buttons.OfType<PopupDialogOkButton>().FirstOrDefault()?.TriggerOnClick();
+                    Buttons.OfType<PopupDialogOkButton>().FirstOrDefault()?.Click();
                     return true;
             }
 
@@ -252,7 +252,7 @@ namespace osu.Game.Overlays.Dialog
             if (!actionInvoked)
                 // In the case a user did not choose an action before a hide was triggered, press the last button.
                 // This is presumed to always be a sane default "cancel" action.
-                buttonsContainer.Last().TriggerOnClick();
+                buttonsContainer.Last().Click();
 
             base.PopOut();
             content.FadeOut(EXIT_DURATION, Easing.InSine);
@@ -261,7 +261,7 @@ namespace osu.Game.Overlays.Dialog
         private void pressButtonAtIndex(int index)
         {
             if (index < Buttons.Count())
-                Buttons.Skip(index).First().TriggerOnClick();
+                Buttons.Skip(index).First().Click();
         }
     }
 }

osu.Game/Overlays/Direct/DirectGridPanel.cs

@@ -7,11 +7,11 @@ using osu.Framework.Allocation;
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
-using osu.Framework.Localisation;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Sprites;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.Input.States;
+using osu.Framework.Localisation;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.Drawables;
 
@@ -44,7 +44,7 @@ namespace osu.Game.Overlays.Direct
         }
 
         [BackgroundDependencyLoader]
-        private void load(OsuColour colours, LocalisationEngine localisation)
+        private void load(OsuColour colours)
         {
             Content.CornerRadius = 4;
 
@@ -74,13 +74,13 @@ namespace osu.Game.Overlays.Direct
                             {
                                 new OsuSpriteText
                                 {
-                                    Text = localisation.GetUnicodePreference(SetInfo.Metadata.TitleUnicode, SetInfo.Metadata.Title),
+                                    Text = new LocalisedString((SetInfo.Metadata.TitleUnicode, SetInfo.Metadata.Title)),
                                     TextSize = 18,
                                     Font = @"Exo2.0-BoldItalic",
                                 },
                                 new OsuSpriteText
                                 {
-                                    Text = localisation.GetUnicodePreference(SetInfo.Metadata.ArtistUnicode, SetInfo.Metadata.Artist),
+                                    Text = new LocalisedString((SetInfo.Metadata.ArtistUnicode, SetInfo.Metadata.Artist)),
                                     Font = @"Exo2.0-BoldItalic",
                                 },
                             },
@@ -217,8 +217,10 @@ namespace osu.Game.Overlays.Direct
                 statusContainer.Add(new IconPill(FontAwesome.fa_image));
             }
 
-            statusContainer.Add(new BeatmapSetOnlineStatusPill(12, new MarginPadding { Horizontal = 10, Vertical = 5 })
+            statusContainer.Add(new BeatmapSetOnlineStatusPill
             {
+                TextSize = 12,
+                TextPadding = new MarginPadding { Horizontal = 10, Vertical = 5 },
                 Status = SetInfo.OnlineInfo?.Status ?? BeatmapSetOnlineStatus.None,
             });
 

osu.Game/Overlays/Direct/DirectListPanel.cs

@@ -10,8 +10,8 @@ using osu.Framework.Graphics.Colour;
 using osu.Game.Graphics;
 using osu.Game.Graphics.Sprites;
 using osu.Framework.Allocation;
-using osu.Framework.Localisation;
 using osu.Framework.Graphics.Shapes;
+using osu.Framework.Localisation;
 using osu.Game.Beatmaps;
 
 namespace osu.Game.Overlays.Direct
@@ -39,7 +39,7 @@ namespace osu.Game.Overlays.Direct
         }
 
         [BackgroundDependencyLoader]
-        private void load(LocalisationEngine localisation, OsuColour colours)
+        private void load(OsuColour colours)
         {
             Content.CornerRadius = 5;
 
@@ -94,13 +94,13 @@ namespace osu.Game.Overlays.Direct
                                                     {
                                                         new OsuSpriteText
                                                         {
-                                                            Current = localisation.GetUnicodePreference(SetInfo.Metadata.TitleUnicode, SetInfo.Metadata.Title),
+                                                            Text = new LocalisedString((SetInfo.Metadata.TitleUnicode, SetInfo.Metadata.Title)),
                                                             TextSize = 18,
                                                             Font = @"Exo2.0-BoldItalic",
                                                         },
                                                         new OsuSpriteText
                                                         {
-                                                            Current = localisation.GetUnicodePreference(SetInfo.Metadata.ArtistUnicode, SetInfo.Metadata.Artist),
+                                                            Text = new LocalisedString((SetInfo.Metadata.ArtistUnicode, SetInfo.Metadata.Artist)),
                                                             Font = @"Exo2.0-BoldItalic",
                                                         },
                                                     }

osu.Game/Overlays/Direct/DirectPanel.cs

@@ -104,8 +104,6 @@ namespace osu.Game.Overlays.Direct
             beatmaps.ItemAdded += setAdded;
         }
 
-        public override bool DisposeOnDeathRemoval => true;
-
         protected override void Dispose(bool isDisposing)
         {
             base.Dispose(isDisposing);
@@ -187,7 +185,7 @@ namespace osu.Game.Overlays.Direct
             base.LoadComplete();
             this.FadeInFromZero(200, Easing.Out);
 
-            PreviewPlaying.ValueChanged += newValue => PlayButton.FadeTo(newValue || IsHovered ? 1 : 0, 120, Easing.InOutQuint);
+            PreviewPlaying.ValueChanged += newValue => PlayButton.FadeTo(newValue || IsHovered || !FadePlayButton ? 1 : 0, 120, Easing.InOutQuint);
             PreviewPlaying.ValueChanged += newValue => PreviewBar.FadeTo(newValue ? 1 : 0, 120, Easing.InOutQuint);
         }
 

osu.Game/Overlays/DirectOverlay.cs

@@ -240,6 +240,15 @@ namespace osu.Game.Overlays
             });
         }
 
+        protected override void PopIn()
+        {
+            base.PopIn();
+
+            // Queries are allowed to be run only on the first pop-in
+            if (getSetsRequest == null)
+                Scheduler.AddOnce(updateSearch);
+        }
+
         private SearchBeatmapSetsRequest getSetsRequest;
 
         private readonly Bindable<string> currentQuery = new Bindable<string>();
@@ -251,16 +260,22 @@ namespace osu.Game.Overlays
         {
             queryChangedDebounce?.Cancel();
 
-            if (!IsLoaded) return;
+            if (!IsLoaded)
+                return;
+
+            if (State == Visibility.Hidden)
+                return;
 
             BeatmapSets = null;
             ResultAmounts = null;
 
             getSetsRequest?.Cancel();
 
-            if (api == null) return;
+            if (api == null)
+                return;
 
-            if (Header.Tabs.Current.Value == DirectTab.Search && (Filter.Search.Text == string.Empty || currentQuery == string.Empty)) return;
+            if (Header.Tabs.Current.Value == DirectTab.Search && (Filter.Search.Text == string.Empty || currentQuery == string.Empty))
+                return;
 
             previewTrackManager.StopAnyPlaying(this);
 

osu.Game/Overlays/KeyBinding/KeyBindingRow.cs

@@ -50,7 +50,7 @@ namespace osu.Game.Overlays.KeyBinding
 
         private FillFlowContainer<KeyButton> buttons;
 
-        public IEnumerable<string> FilterTerms => bindings.Select(b => b.KeyCombination.ReadableString()).Prepend(text.Text);
+        public IEnumerable<string> FilterTerms => bindings.Select(b => b.KeyCombination.ReadableString()).Prepend((string)text.Text);
 
         public KeyBindingRow(object action, IEnumerable<Framework.Input.Bindings.KeyBinding> bindings)
         {

osu.Game/Overlays/MainSettings.cs

@@ -155,7 +155,7 @@ namespace osu.Game.Overlays
                 switch (action)
                 {
                     case GlobalAction.Back:
-                        TriggerOnClick();
+                        Click();
                         return true;
                 }
 

osu.Game/Overlays/MedalSplash/DrawableMedal.cs

@@ -118,9 +118,9 @@ namespace osu.Game.Overlays.MedalSplash
         }
 
         [BackgroundDependencyLoader]
-        private void load(OsuColour colours, TextureStore textures)
+        private void load(OsuColour colours, TextureStore textures, LargeTextureStore largeTextures)
         {
-            medalSprite.Texture = textures.Get(medal.ImageUrl);
+            medalSprite.Texture = largeTextures.Get(medal.ImageUrl);
             medalGlow.Texture = textures.Get(@"MedalSplash/medal-glow");
             description.Colour = colours.BlueLight;
         }

osu.Game/Overlays/Music/PlaylistItem.cs

@@ -28,8 +28,8 @@ namespace osu.Game.Overlays.Music
         private SpriteIcon handle;
         private TextFlowContainer text;
         private IEnumerable<SpriteText> titleSprites;
-        private UnicodeBindableString titleBind;
-        private UnicodeBindableString artistBind;
+        private ILocalisedBindableString titleBind;
+        private ILocalisedBindableString artistBind;
 
         public readonly BeatmapSetInfo BeatmapSetInfo;
 
@@ -74,7 +74,7 @@ namespace osu.Game.Overlays.Music
         }
 
         [BackgroundDependencyLoader]
-        private void load(OsuColour colours, LocalisationEngine localisation)
+        private void load(OsuColour colours, LocalisationManager localisation)
         {
             hoverColour = colours.Yellow;
             artistColour = colours.Gray9;
@@ -97,11 +97,10 @@ namespace osu.Game.Overlays.Music
                 },
             };
 
-            titleBind = localisation.GetUnicodePreference(metadata.TitleUnicode, metadata.Title);
-            artistBind = localisation.GetUnicodePreference(metadata.ArtistUnicode, metadata.Artist);
+            titleBind = localisation.GetLocalisedString(new LocalisedString((metadata.TitleUnicode, metadata.Title)));
+            artistBind = localisation.GetLocalisedString(new LocalisedString((metadata.ArtistUnicode, metadata.Artist)));
 
-            artistBind.ValueChanged += newText => recreateText();
-            artistBind.TriggerChange();
+            artistBind.BindValueChanged(newText => recreateText(), true);
         }
 
         private void recreateText()

osu.Game/Overlays/MusicController.cs

@@ -47,7 +47,6 @@ namespace osu.Game.Overlays
         private PlaylistOverlay playlist;
 
         private BeatmapManager beatmaps;
-        private LocalisationEngine localisation;
 
         private List<BeatmapSetInfo> beatmapSets;
         private BeatmapSetInfo currentSet;
@@ -67,11 +66,10 @@ namespace osu.Game.Overlays
         }
 
         [BackgroundDependencyLoader]
-        private void load(BindableBeatmap beatmap, BeatmapManager beatmaps, OsuColour colours, LocalisationEngine localisation)
+        private void load(BindableBeatmap beatmap, BeatmapManager beatmaps, OsuColour colours)
         {
             this.beatmap.BindTo(beatmap);
             this.beatmaps = beatmaps;
-            this.localisation = localisation;
 
             Children = new Drawable[]
             {
@@ -351,17 +349,14 @@ namespace osu.Game.Overlays
                 {
                     if (beatmap?.Beatmap == null) //this is not needed if a placeholder exists
                     {
-                        title.Current = null;
                         title.Text = @"Nothing to play";
-
-                        artist.Current = null;
                         artist.Text = @"Nothing to play";
                     }
                     else
                     {
                         BeatmapMetadata metadata = beatmap.Metadata;
-                        title.Current = localisation.GetUnicodePreference(metadata.TitleUnicode, metadata.Title);
-                        artist.Current = localisation.GetUnicodePreference(metadata.ArtistUnicode, metadata.Artist);
+                        title.Text = new LocalisedString((metadata.TitleUnicode, metadata.Title));
+                        artist.Text = new LocalisedString((metadata.ArtistUnicode, metadata.Artist));
                     }
                 });
 

osu.Game/Overlays/NotificationOverlay.cs

@@ -96,8 +96,7 @@ namespace osu.Game.Overlays
             base.LoadComplete();
 
             StateChanged += _ => updateProcessingMode();
-            OverlayActivationMode.ValueChanged += _ => updateProcessingMode();
-            OverlayActivationMode.TriggerChange();
+            OverlayActivationMode.BindValueChanged(_ => updateProcessingMode(), true);
         }
 
         private int totalCount => sections.Select(c => c.DisplayedCount).Sum();

osu.Game/Overlays/Notifications/ProgressNotification.cs

@@ -169,7 +169,7 @@ namespace osu.Game.Overlays.Notifications
         public Action<Notification> CompletionTarget { get; set; }
 
         /// <summary>
-        /// An action to complete when the completion notification is clicked.
+        /// An action to complete when the completion notification is clicked. Return true to close.
         /// </summary>
         public Func<bool> CompletionClickAction;
 

osu.Game/Overlays/Profile/Header/BadgeContainer.cs

@@ -176,7 +176,7 @@ namespace osu.Game.Overlays.Profile.Header
             }
 
             [BackgroundDependencyLoader]
-            private void load(TextureStore textures)
+            private void load(LargeTextureStore textures)
             {
                 Child = new Sprite
                 {

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

@@ -29,7 +29,7 @@ namespace osu.Game.Overlays.Profile.Sections
         public string TooltipText { get; }
 
         [BackgroundDependencyLoader(true)]
-        private void load(LocalisationEngine locale, BeatmapSetOverlay beatmapSetOverlay)
+        private void load(BeatmapSetOverlay beatmapSetOverlay)
         {
             Action = () =>
             {
@@ -46,16 +46,14 @@ namespace osu.Game.Overlays.Profile.Sections
                 {
                     new OsuSpriteText
                     {
-                        Current = locale.GetUnicodePreference(
-                            $"{beatmap.Metadata.TitleUnicode ?? beatmap.Metadata.Title} [{beatmap.Version}] ",
-                            $"{beatmap.Metadata.Title ?? beatmap.Metadata.TitleUnicode} [{beatmap.Version}] "
-                        ),
+                        Text = new LocalisedString(($"{beatmap.Metadata.TitleUnicode ?? beatmap.Metadata.Title} [{beatmap.Version}] ",
+                                                    $"{beatmap.Metadata.Title ?? beatmap.Metadata.TitleUnicode} [{beatmap.Version}] ")),
                         TextSize = 15,
                         Font = "Exo2.0-SemiBoldItalic",
                     },
                     new OsuSpriteText
                     {
-                        Current = locale.GetUnicodePreference(beatmap.Metadata.ArtistUnicode, beatmap.Metadata.Artist),
+                        Text = new LocalisedString((beatmap.Metadata.ArtistUnicode, beatmap.Metadata.Artist)),
                         TextSize = 12,
                         Padding = new MarginPadding { Top = 3 },
                         Font = "Exo2.0-RegularItalic",

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

@@ -14,8 +14,8 @@ namespace osu.Game.Overlays.Profile.Sections.Beatmaps
     public class PaginatedBeatmapContainer : PaginatedContainer
     {
         private const float panel_padding = 10f;
-
         private readonly BeatmapSetType type;
+        private GetUserBeatmapsRequest request;
 
         public PaginatedBeatmapContainer(BeatmapSetType type, Bindable<User> user, string header, string missing = "None... yet.")
             : base(user, header, missing)
@@ -31,9 +31,8 @@ namespace osu.Game.Overlays.Profile.Sections.Beatmaps
         {
             base.ShowMore();
 
-            var req = new GetUserBeatmapsRequest(User.Value.Id, type, VisiblePages++ * ItemsPerPage);
-
-            req.Success += sets =>
+            request = new GetUserBeatmapsRequest(User.Value.Id, type, VisiblePages++ * ItemsPerPage);
+            request.Success += sets => Schedule(() =>
             {
                 ShowMoreButton.FadeTo(sets.Count == ItemsPerPage ? 1 : 0);
                 ShowMoreLoading.Hide();
@@ -52,9 +51,15 @@ namespace osu.Game.Overlays.Profile.Sections.Beatmaps
                     var panel = new DirectGridPanel(s.ToBeatmapSet(Rulesets));
                     ItemsContainer.Add(panel);
                 }
-            };
+            });
 
-            Api.Queue(req);
+            Api.Queue(request);
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+            request?.Cancel();
         }
     }
 }

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

@@ -12,6 +12,8 @@ namespace osu.Game.Overlays.Profile.Sections.Historical
 {
     public class PaginatedMostPlayedBeatmapContainer : PaginatedContainer
     {
+        private GetUserMostPlayedBeatmapsRequest request;
+
         public PaginatedMostPlayedBeatmapContainer(Bindable<User> user)
             :base(user, "Most Played Beatmaps", "No records. :(")
         {
@@ -24,9 +26,8 @@ namespace osu.Game.Overlays.Profile.Sections.Historical
         {
             base.ShowMore();
 
-            var req = new GetUserMostPlayedBeatmapsRequest(User.Value.Id, VisiblePages++ * ItemsPerPage);
-
-            req.Success += beatmaps =>
+            request = new GetUserMostPlayedBeatmapsRequest(User.Value.Id, VisiblePages++ * ItemsPerPage);
+            request.Success += beatmaps => Schedule(() =>
             {
                 ShowMoreButton.FadeTo(beatmaps.Count == ItemsPerPage ? 1 : 0);
                 ShowMoreLoading.Hide();
@@ -43,9 +44,16 @@ namespace osu.Game.Overlays.Profile.Sections.Historical
                 {
                     ItemsContainer.Add(new DrawableMostPlayedRow(beatmap.GetBeatmapInfo(Rulesets), beatmap.PlayCount));
                 }
-            };
+            });
 
-            Api.Queue(req);
+            Api.Queue(request);
+        }
+
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+            request?.Cancel();
         }
     }
 }

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

@@ -28,6 +28,7 @@ namespace osu.Game.Overlays.Profile.Sections
         protected readonly Bindable<User> User = new Bindable<User>();
 
         protected APIAccess Api;
+        protected APIRequest RetrievalRequest;
         protected RulesetStore Rulesets;
 
         public PaginatedContainer(Bindable<User> user, string header, string missing)

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

@@ -16,6 +16,7 @@ namespace osu.Game.Overlays.Profile.Sections.Ranks
     {
         private readonly bool includeWeight;
         private readonly ScoreType type;
+        private GetUserScoresRequest request;
 
         public PaginatedScoreContainer(ScoreType type, Bindable<User> user, string header, string missing, bool includeWeight = false)
             : base(user, header, missing)
@@ -32,9 +33,8 @@ namespace osu.Game.Overlays.Profile.Sections.Ranks
         {
             base.ShowMore();
 
-            var req = new GetUserScoresRequest(User.Value.Id, type, VisiblePages++ * ItemsPerPage);
-
-            req.Success += scores =>
+            request = new GetUserScoresRequest(User.Value.Id, type, VisiblePages++ * ItemsPerPage);
+            request.Success += scores => Schedule(() =>
             {
                 foreach (var s in scores)
                     s.ApplyRuleset(Rulesets.GetRuleset(s.OnlineRulesetID));
@@ -66,9 +66,15 @@ namespace osu.Game.Overlays.Profile.Sections.Ranks
 
                     ItemsContainer.Add(drawableScore);
                 }
-            };
+            });
 
-            Api.Queue(req);
+            Api.Queue(request);
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+            request?.Cancel();
         }
     }
 }

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

@@ -30,7 +30,7 @@ namespace osu.Game.Overlays.Profile.Sections.Recent
         }
 
         [BackgroundDependencyLoader]
-        private void load(TextureStore textures)
+        private void load(LargeTextureStore textures)
         {
             sprite.Texture = textures.Get(url);
         }

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

@@ -12,6 +12,8 @@ namespace osu.Game.Overlays.Profile.Sections.Recent
 {
     public class PaginatedRecentActivityContainer : PaginatedContainer
     {
+        private GetUserRecentActivitiesRequest request;
+
         public PaginatedRecentActivityContainer(Bindable<User> user, string header, string missing)
             : base(user, header, missing)
         {
@@ -22,9 +24,8 @@ namespace osu.Game.Overlays.Profile.Sections.Recent
         {
             base.ShowMore();
 
-            var req = new GetUserRecentActivitiesRequest(User.Value.Id, VisiblePages++ * ItemsPerPage);
-
-            req.Success += activities =>
+            request = new GetUserRecentActivitiesRequest(User.Value.Id, VisiblePages++ * ItemsPerPage);
+            request.Success += activities => Schedule(() =>
             {
                 ShowMoreButton.FadeTo(activities.Count == ItemsPerPage ? 1 : 0);
                 ShowMoreLoading.Hide();
@@ -41,9 +42,15 @@ namespace osu.Game.Overlays.Profile.Sections.Recent
                 {
                     ItemsContainer.Add(new DrawableRecentActivity(activity));
                 }
-            };
+            });
 
-            Api.Queue(req);
+            Api.Queue(request);
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            base.Dispose(isDisposing);
+            request?.Cancel();
         }
     }
 }

osu.Game/Overlays/Settings/Sections/Debug/GCSettings.cs

@@ -13,15 +13,18 @@ namespace osu.Game.Overlays.Settings.Sections.Debug
     {
         protected override string Header => "Garbage Collector";
 
+        private readonly Bindable<LatencyMode> latencyMode = new Bindable<LatencyMode>();
+        private Bindable<GCLatencyMode> configLatencyMode;
+
         [BackgroundDependencyLoader]
         private void load(FrameworkDebugConfigManager config)
         {
             Children = new Drawable[]
             {
-                new SettingsEnumDropdown<GCLatencyMode>
+                new SettingsEnumDropdown<LatencyMode>
                 {
                     LabelText = "Active mode",
-                    Bindable = config.GetBindable<GCLatencyMode>(DebugSetting.ActiveGCMode)
+                    Bindable = latencyMode
                 },
                 new SettingsButton
                 {
@@ -29,6 +32,18 @@ namespace osu.Game.Overlays.Settings.Sections.Debug
                     Action = GC.Collect
                 },
             };
+
+            configLatencyMode = config.GetBindable<GCLatencyMode>(DebugSetting.ActiveGCMode);
+            configLatencyMode.BindValueChanged(v => latencyMode.Value = (LatencyMode)v, true);
+            latencyMode.BindValueChanged(v => configLatencyMode.Value = (GCLatencyMode)v);
+        }
+
+        private enum LatencyMode
+        {
+            Batch = GCLatencyMode.Batch,
+            Interactive = GCLatencyMode.Interactive,
+            LowLatency = GCLatencyMode.LowLatency,
+            SustainedLowLatency = GCLatencyMode.SustainedLowLatency
         }
     }
 }

osu.Game/Overlays/Settings/Sections/Graphics/LayoutSettings.cs

@@ -1,8 +1,12 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
 using osu.Framework.Allocation;
 using osu.Framework.Configuration;
+using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 
@@ -15,21 +19,36 @@ namespace osu.Game.Overlays.Settings.Sections.Graphics
         private FillFlowContainer letterboxSettings;
 
         private Bindable<bool> letterboxing;
+        private Bindable<Size> sizeFullscreen;
+
+        private OsuGameBase game;
+        private SettingsDropdown<Size> resolutionDropdown;
+        private SettingsEnumDropdown<WindowMode> windowModeDropdown;
 
         private const int transition_duration = 400;
 
         [BackgroundDependencyLoader]
-        private void load(FrameworkConfigManager config)
+        private void load(FrameworkConfigManager config, OsuGameBase game)
         {
+            this.game = game;
+
             letterboxing = config.GetBindable<bool>(FrameworkSetting.Letterboxing);
+            sizeFullscreen = config.GetBindable<Size>(FrameworkSetting.SizeFullscreen);
+
+            Container resolutionSettingsContainer;
 
             Children = new Drawable[]
             {
-                new SettingsEnumDropdown<WindowMode>
+                windowModeDropdown = new SettingsEnumDropdown<WindowMode>
                 {
                     LabelText = "Screen mode",
                     Bindable = config.GetBindable<WindowMode>(FrameworkSetting.WindowMode),
                 },
+                resolutionSettingsContainer = new Container
+                {
+                    RelativeSizeAxes = Axes.X,
+                    AutoSizeAxes = Axes.Y
+                },
                 new SettingsCheckbox
                 {
                     LabelText = "Letterboxing",
@@ -62,15 +81,52 @@ namespace osu.Game.Overlays.Settings.Sections.Graphics
                 },
             };
 
-            letterboxing.ValueChanged += isVisible =>
+            var resolutions = getResolutions();
+
+            if (resolutions.Count > 1)
+            {
+                resolutionSettingsContainer.Child = resolutionDropdown = new SettingsDropdown<Size>
+                {
+                    LabelText = "Resolution",
+                    ShowsDefaultIndicator = false,
+                    Items = resolutions,
+                    Bindable = sizeFullscreen
+                };
+
+                windowModeDropdown.Bindable.BindValueChanged(windowMode =>
+                {
+                    if (windowMode == WindowMode.Fullscreen)
+                    {
+                        resolutionDropdown.Show();
+                        sizeFullscreen.TriggerChange();
+                    }
+                    else
+                        resolutionDropdown.Hide();
+                });
+            }
+
+            letterboxing.BindValueChanged(isVisible =>
             {
                 letterboxSettings.ClearTransforms();
                 letterboxSettings.AutoSizeAxes = isVisible ? Axes.Y : Axes.None;
 
                 if (!isVisible)
                     letterboxSettings.ResizeHeightTo(0, transition_duration, Easing.OutQuint);
-            };
-            letterboxing.TriggerChange();
+            }, true);
+        }
+
+        private IReadOnlyList<KeyValuePair<string, Size>> getResolutions()
+        {
+            var resolutions = new KeyValuePair<string, Size>("Default", new Size(9999, 9999)).Yield();
+
+            if (game.Window != null)
+                resolutions = resolutions.Concat(game.Window.AvailableResolutions
+                                                     .Where(r => r.Width >= 800 && r.Height >= 600)
+                                                     .OrderByDescending(r => r.Width)
+                                                     .ThenByDescending(r => r.Height)
+                                                     .Select(res => new KeyValuePair<string, Size>($"{res.Width}x{res.Height}", new Size(res.Width, res.Height)))
+                                                     .Distinct());
+            return resolutions.ToList();
         }
     }
 }

osu.Game/Overlays/Settings/Sections/Maintenance/GeneralSettings.cs

@@ -7,6 +7,7 @@ using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Game.Beatmaps;
 using osu.Game.Graphics.UserInterface;
+using osu.Game.Skinning;
 
 namespace osu.Game.Overlays.Settings.Sections.Maintenance
 {
@@ -20,7 +21,7 @@ namespace osu.Game.Overlays.Settings.Sections.Maintenance
         protected override string Header => "General";
 
         [BackgroundDependencyLoader]
-        private void load(BeatmapManager beatmaps, DialogOverlay dialogOverlay)
+        private void load(BeatmapManager beatmaps, SkinManager skins, DialogOverlay dialogOverlay)
         {
             Children = new Drawable[]
             {
@@ -30,7 +31,7 @@ namespace osu.Game.Overlays.Settings.Sections.Maintenance
                     Action = () =>
                     {
                         importButton.Enabled.Value = false;
-                        beatmaps.ImportFromStable().ContinueWith(t => Schedule(() => importButton.Enabled.Value = true));
+                        beatmaps.ImportFromStableAsync().ContinueWith(t => Schedule(() => importButton.Enabled.Value = true));
                     }
                 },
                 deleteButton = new DangerousSettingsButton
@@ -45,6 +46,27 @@ namespace osu.Game.Overlays.Settings.Sections.Maintenance
                         }));
                     }
                 },
+                importButton = new SettingsButton
+                {
+                    Text = "Import skins from stable",
+                    Action = () =>
+                    {
+                        importButton.Enabled.Value = false;
+                        skins.ImportFromStableAsync().ContinueWith(t => Schedule(() => importButton.Enabled.Value = true));
+                    }
+                },
+                deleteButton = new DangerousSettingsButton
+                {
+                    Text = "Delete ALL skins",
+                    Action = () =>
+                    {
+                        dialogOverlay?.Push(new DeleteAllBeatmapsDialog(() =>
+                        {
+                            deleteButton.Enabled.Value = false;
+                            Task.Run(() => skins.Delete(skins.GetAllUserSkins())).ContinueWith(t => Schedule(() => deleteButton.Enabled.Value = true));
+                        }));
+                    }
+                },
                 restoreButton = new SettingsButton
                 {
                     Text = "Restore all hidden difficulties",

osu.Game/Overlays/Settings/Sections/SkinSection.cs

@@ -51,10 +51,10 @@ namespace osu.Game.Overlays.Settings.Sections
                 },
             };
 
-            skins.ItemAdded += onItemsChanged;
-            skins.ItemRemoved += onItemsChanged;
+            skins.ItemAdded += itemAdded;
+            skins.ItemRemoved += itemRemoved;
 
-            reloadSkins();
+            skinDropdown.Items = skins.GetAllUsableSkins().Select(s => new KeyValuePair<string, int>(s.ToString(), s.ID));
 
             var skinBindable = config.GetBindable<int>(OsuSetting.Skin);
 
@@ -65,9 +65,8 @@ namespace osu.Game.Overlays.Settings.Sections
             skinDropdown.Bindable = skinBindable;
         }
 
-        private void reloadSkins() => skinDropdown.Items = skins.GetAllUsableSkins().Select(s => new KeyValuePair<string, int>(s.ToString(), s.ID));
-
-        private void onItemsChanged(SkinInfo _) => Schedule(reloadSkins);
+        private void itemRemoved(SkinInfo s) => skinDropdown.Items = skinDropdown.Items.Where(i => i.Value != s.ID);
+        private void itemAdded(SkinInfo s) => skinDropdown.Items = skinDropdown.Items.Append(new KeyValuePair<string, int>(s.ToString(), s.ID));
 
         protected override void Dispose(bool isDisposing)
         {
@@ -75,8 +74,8 @@ namespace osu.Game.Overlays.Settings.Sections
 
             if (skins != null)
             {
-                skins.ItemAdded -= onItemsChanged;
-                skins.ItemRemoved -= onItemsChanged;
+                skins.ItemAdded -= itemAdded;
+                skins.ItemRemoved -= itemRemoved;
             }
         }
 

osu.Game/Overlays/Settings/SettingsSection.cs

@@ -73,7 +73,7 @@ namespace osu.Game.Overlays.Settings
                     },
                     RelativeSizeAxes = Axes.X,
                     AutoSizeAxes = Axes.Y,
-                    Children = new[]
+                    Children = new Drawable[]
                     {
                         new OsuSpriteText
                         {