Merge remote-tracking branch 'origin/master' into fix-slider-samples

# Conflicts:
#	osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapDecoderTest.cs
#	osu.Game/Rulesets/Objects/Legacy/Catch/ConvertHitObjectParser.cs
#	osu.Game/Rulesets/Objects/Legacy/ConvertHitObjectParser.cs
#	osu.Game/Rulesets/Objects/Legacy/Mania/ConvertHitObjectParser.cs
#	osu.Game/Rulesets/Objects/Legacy/Osu/ConvertHitObjectParser.cs
#	osu.Game/Rulesets/Objects/Legacy/Taiko/ConvertHitObjectParser.cs

.github/ISSUE_TEMPLATE/bug-issues.md

@@ -0,0 +1,14 @@
+---
+name: Bug Report
+about: For issues regarding encountered game bugs
+---
+
+<!-- After you fill in all information, delete all comments in the issue -->
+
+**Describe your problem:** <!-- Provide any information you believe could be useful -->
+
+**Screenshots or videos showing encountered issue:** 
+
+**osu!lazer version:** <!-- Provide the version of your osu!lazer, you can find it at the bottom of the screen  -->
+
+**Logs:** <!-- Attach your osu!lazer logs, you can find them under %appdata%\osu\logs in Windows, or under ~/.local/share/osu/ in Linux and macOS -->

.github/ISSUE_TEMPLATE/crash-issues.md

@@ -0,0 +1,16 @@
+---
+name: Crash Report
+about: For issues regarding game crashes or permanent freezes
+---
+
+<!-- After you fill in all information, delete all comments in the issue -->
+
+**Describe your problem:** <!-- Provide any information you believe could be useful -->
+
+**Screenshots or videos showing encountered issue:** 
+
+**osu!lazer version:** <!-- Provide the version of your osu!lazer, you can find it at the bottom of the screen  -->
+
+**Logs:** <!-- Attach your osu!lazer logs, you can find them under %appdata%\osu\logs in Windows, or under ~/.local/share/osu/ in Linux and macOS -->
+
+**Computer Specifications:** <!-- Attach your computer specifications, you can find them by using System Information in Windows, System Monitor in Linux, or About This Mac in macOS -->

.github/ISSUE_TEMPLATE/feature-request-issues.md

@@ -0,0 +1,10 @@
+---
+name: Feature Request
+about: Let us know what you would like to see in the game!
+---
+
+<!-- After you fill in all information, delete all comments in the issue -->
+
+**Describe the feature:** <!-- Describe the feature you would like to see in the game -->
+
+**Proposal designs of the feature:** <!-- Attach screenshots of how the feature should look like according to you -->

.github/ISSUE_TEMPLATE/missing-for-live-issues.md

@@ -0,0 +1,10 @@
+---
+name: Missing for Live
+about: Let us know the features you need which are available in osu-stable but not lazer
+---
+
+<!-- After you fill in all information, delete all comments in the issue -->
+
+**Describe the feature:** <!-- Describe the missing game feature -->
+
+**Designs:** <!-- Attach screenshots of how the feature is supposed to look like. For illustrative purpose only; final designs are usually re-imagined from scratch. -->

.gitignore

@@ -10,6 +10,10 @@
 # User-specific files (MonoDevelop/Xamarin Studio)
 *.userprefs
 
+### Cake ###
+tools/*
+!tools/cakebuild.csproj
+
 # Build results
 bin/[Dd]ebug/
 [Dd]ebugPublic/
@@ -98,6 +102,7 @@ $tf/
 _ReSharper*/
 *.[Rr]e[Ss]harper
 *.DotSettings.user
+inspectcode
 
 # JustCode is a .NET coding add-in
 .JustCode
@@ -257,3 +262,5 @@ paket-files/
 __pycache__/
 *.pyc
 Staging/
+
+inspectcodereport.xml

README.md

@@ -25,6 +25,7 @@ Build and run
 
 - Using Visual Studio 2017, Rider or Visual Studio Code (configurations are included)
 - From command line using `dotnet run --project osu.Desktop`. When building for non-development purposes, add `-c Release` to gain higher performance.
+- To run with code analysis, instead use `powershell ./build.ps1` or `build.sh`. This is currently only supported under windows due to [resharper cli shortcomings](https://youtrack.jetbrains.com/issue/RSRP-410004). Alternative, you can install resharper or use rider to get inline support in your IDE of choice.
 
 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
 

appveyor.yml

@@ -1,22 +1,8 @@
 clone_depth: 1
 version: '{branch}-{build}'
 image: Visual Studio 2017
-configuration: Debug
+test: off
-cache:
-  - C:\ProgramData\chocolatey\bin -> appveyor.yml
-  - C:\ProgramData\chocolatey\lib -> appveyor.yml
 install:
   - cmd: git submodule update --init --recursive --depth=5
-  - cmd: choco install resharper-clt -y
+build_script:
-  - cmd: choco install nvika -y
+  - cmd: PowerShell -Version 2.0 .\build.ps1
-  - cmd: dotnet tool install CodeFileSanity --version 0.0.16 --global
-before_build:
-  - cmd: CodeFileSanity
-  - cmd: nuget restore -verbosity quiet
-build:
-  project: osu.sln
-  parallel: true
-  verbosity: minimal
-after_build:
-  - cmd: inspectcode --o="inspectcodereport.xml" --projects:osu.Game* --caches-home="inspectcode" osu.sln > NUL
-  - cmd: NVika parsereport "inspectcodereport.xml" --treatwarningsaserrors

appveyor_deploy.yml

@@ -1,30 +0,0 @@
-clone_depth: 1
-version: '{build}'
-skip_non_tags: true
-image: Visual Studio 2017
-install:
-  - git clone https://github.com/ppy/osu-deploy
-before_build:
-  - ps: if($env:appveyor_repo_tag -eq 'True') { Update-AppveyorBuild -Version $env:appveyor_repo_tag_name }
-  - cmd: git submodule update --init --recursive --depth=5
-  - cmd: nuget restore -verbosity quiet
-build_script:
-  - ps: iex ((New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/appveyor/secure-file/master/install.ps1'))
-  - appveyor DownloadFile https://puu.sh/BCrS8/7faccf7876.enc # signing certificate
-  - cmd: appveyor-tools\secure-file -decrypt 7faccf7876.enc -secret %decode_secret% -out %HOMEPATH%\deanherbert.pfx
-  - appveyor DownloadFile https://puu.sh/A6g75/fdc6f19b04.enc # deploy configuration
-  - cd osu-deploy
-  - nuget restore -verbosity quiet
-  - msbuild osu.Desktop.Deploy.csproj
-  - cmd: ..\appveyor-tools\secure-file -decrypt ..\fdc6f19b04.enc -secret %decode_secret% -out bin\Debug\netcoreapp2.1\osu.Desktop.Deploy.dll.config
-  - dotnet bin/Debug/netcoreapp2.1/osu.Desktop.Deploy.dll %code_signing_password% %APPVEYOR_REPO_TAG_NAME%
-environment:
-  decode_secret:
-    secure: i67IC2xj6DjjxmA6Oj2jing3+MwzLkq6CbGsjfZ7rdY=
-  code_signing_password:
-    secure: 34tLNqvjmmZEi97MLKfrnQ==
-artifacts:
-  - path: 'osu-deploy/releases/*'
-deploy:
-  - provider: Environment
-    name: github

build.cake

@@ -0,0 +1,72 @@
+#addin "nuget:?package=CodeFileSanity&version=0.0.21"
+#addin "nuget:?package=JetBrains.ReSharper.CommandLineTools&version=2018.2.2"
+#tool "nuget:?package=NVika.MSBuild&version=1.0.1"
+
+///////////////////////////////////////////////////////////////////////////////
+// ARGUMENTS
+///////////////////////////////////////////////////////////////////////////////
+
+var target = Argument("target", "Build");
+var configuration = Argument("configuration", "Release");
+
+var osuSolution = new FilePath("./osu.sln");
+
+///////////////////////////////////////////////////////////////////////////////
+// TASKS
+///////////////////////////////////////////////////////////////////////////////
+
+Task("Restore")
+    .Does(() => {
+        DotNetCoreRestore(osuSolution.FullPath);
+    });
+
+Task("Compile")
+    .IsDependentOn("Restore")
+    .Does(() => {
+        DotNetCoreBuild(osuSolution.FullPath, new DotNetCoreBuildSettings {
+            Configuration = configuration,
+            NoRestore = true,
+        });
+    });
+
+Task("Test")
+    .IsDependentOn("Compile")
+    .Does(() => {
+        var testAssemblies = GetFiles("**/*.Tests/bin/**/*.Tests.dll");
+
+        DotNetCoreVSTest(testAssemblies, new DotNetCoreVSTestSettings {
+            Logger = AppVeyor.IsRunningOnAppVeyor ? "Appveyor" : $"trx",
+            Parallel = true,
+            ToolTimeout = TimeSpan.FromMinutes(10),
+        });
+    });
+
+// windows only because both inspectcore and nvika depend on net45
+Task("InspectCode")
+    .WithCriteria(IsRunningOnWindows())
+    .IsDependentOn("Compile")
+    .Does(() => {
+        var nVikaToolPath = GetFiles("./tools/NVika.MSBuild.*/tools/NVika.exe").First();
+
+        InspectCode(osuSolution, new InspectCodeSettings {
+            CachesHome = "inspectcode",
+            OutputFile = "inspectcodereport.xml",
+        });
+
+        StartProcess(nVikaToolPath, @"parsereport ""inspectcodereport.xml"" --treatwarningsaserrors");
+    });
+
+Task("CodeFileSanity")
+    .Does(() => {
+        ValidateCodeSanity(new ValidateCodeSanitySettings {
+            RootDirectory = ".",
+            IsAppveyorBuild = AppVeyor.IsRunningOnAppVeyor
+        });
+    });
+
+Task("Build")
+    .IsDependentOn("CodeFileSanity")
+    .IsDependentOn("InspectCode")
+    .IsDependentOn("Test");
+
+RunTarget(target);

build.ps1

@@ -0,0 +1,79 @@
+##########################################################################
+# This is a customized Cake bootstrapper script for PowerShell.
+##########################################################################
+
+<#
+
+.SYNOPSIS
+This is a Powershell script to bootstrap a Cake build.
+
+.DESCRIPTION
+This Powershell script restores NuGet tools (including Cake)
+and execute your Cake build script with the parameters you provide.
+
+.PARAMETER Script
+The build script to execute.
+.PARAMETER Target
+The build script target to run.
+.PARAMETER Configuration
+The build configuration to use.
+.PARAMETER Verbosity
+Specifies the amount of information to be displayed.
+.PARAMETER ShowDescription
+Shows description about tasks.
+.PARAMETER DryRun
+Performs a dry run.
+.PARAMETER ScriptArgs
+Remaining arguments are added here.
+
+.LINK
+https://cakebuild.net
+
+#>
+
+[CmdletBinding()]
+Param(
+    [string]$Script = "build.cake",
+    [string]$Target,
+    [string]$Configuration,
+    [ValidateSet("Quiet", "Minimal", "Normal", "Verbose", "Diagnostic")]
+    [string]$Verbosity,
+    [switch]$ShowDescription,
+    [Alias("WhatIf", "Noop")]
+    [switch]$DryRun,
+    [Parameter(Position=0,Mandatory=$false,ValueFromRemainingArguments=$true)]
+    [string[]]$ScriptArgs
+)
+
+Write-Host "Preparing to run build script..."
+
+# Determine the script root for resolving other paths.
+if(!$PSScriptRoot){
+    $PSScriptRoot = Split-Path $MyInvocation.MyCommand.Path -Parent
+}
+
+# Resolve the paths for resources used for debugging.
+$TOOLS_DIR = Join-Path $PSScriptRoot "tools"
+$CAKE_CSPROJ = Join-Path $TOOLS_DIR "cakebuild.csproj"
+
+# Install the required tools locally.
+Write-Host "Restoring cake tools..."
+Invoke-Expression "dotnet restore `"$CAKE_CSPROJ`" --packages `"$TOOLS_DIR`"" | Out-Null
+
+# Find the Cake executable
+$CAKE_EXECUTABLE = (Get-ChildItem -Path ./tools/cake.coreclr/ -Filter Cake.dll -Recurse).FullName
+
+# Build Cake arguments
+$cakeArguments = @("$Script");
+if ($Target) { $cakeArguments += "-target=$Target" }
+if ($Configuration) { $cakeArguments += "-configuration=$Configuration" }
+if ($Verbosity) { $cakeArguments += "-verbosity=$Verbosity" }
+if ($ShowDescription) { $cakeArguments += "-showdescription" }
+if ($DryRun) { $cakeArguments += "-dryrun" }
+if ($Experimental) { $cakeArguments += "-experimental" }
+$cakeArguments += $ScriptArgs
+
+# Start Cake
+Write-Host "Running build script..."
+Invoke-Expression "dotnet `"$CAKE_EXECUTABLE`" $cakeArguments"
+exit $LASTEXITCODE

build.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env bash
+
+##########################################################################
+# This is a customized Cake bootstrapper script for Shell.
+##########################################################################
+
+echo "Preparing to run build script..."
+
+SCRIPT_DIR=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+TOOLS_DIR=$SCRIPT_DIR/tools
+CAKE_BINARY_PATH=$TOOLS_DIR/"cake.coreclr"
+
+SCRIPT="build.cake"
+CAKE_CSPROJ=$TOOLS_DIR/"cakebuild.csproj"
+
+# Parse arguments.
+CAKE_ARGUMENTS=()
+for i in "$@"; do
+    case $1 in
+        -s|--script) SCRIPT="$2"; shift ;;
+        --) shift; CAKE_ARGUMENTS+=("$@"); break ;;
+        *) CAKE_ARGUMENTS+=("$1") ;;
+    esac
+    shift
+done
+
+# Install the required tools locally.
+echo "Restoring cake tools..."
+dotnet restore $CAKE_CSPROJ --packages $TOOLS_DIR > /dev/null 2>&1
+
+# Search for the CakeBuild binary.
+CAKE_BINARY=$(find $CAKE_BINARY_PATH -name "Cake.dll")
+
+# Start Cake
+echo "Running build script..."
+
+dotnet "$CAKE_BINARY" $SCRIPT "${CAKE_ARGUMENTS[@]}"

cake.config

@@ -0,0 +1,5 @@
+
+[Nuget]
+Source=https://api.nuget.org/v3/index.json
+UseInProcessClient=true
+LoadDependencies=true

osu-resources

@@ -1 +1 @@
-Subproject commit c3848d8b1c84966abe851d915bcca878415614b4
+Subproject commit 9ee64e369fe6fdafc6aed40f5a35b5f01eb82c53

osu.Desktop/osu.Desktop.csproj

@@ -27,7 +27,7 @@
   </ItemGroup>
   <ItemGroup Label="Package References">
     <PackageReference Include="System.IO.Packaging" Version="4.5.0" />
-    <PackageReference Include="ppy.squirrel.windows" Version="1.8.0.8" />
+    <PackageReference Include="ppy.squirrel.windows" Version="1.9.0.2" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.1.4" />
   </ItemGroup>

osu.Game.Rulesets.Catch.Tests/TestCaseAutoJuiceStream.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.Collections.Generic;
 using System.Linq;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Objects;
@@ -38,12 +37,12 @@ namespace osu.Game.Rulesets.Catch.Tests
                 beatmap.HitObjects.Add(new JuiceStream
                 {
                     X = 0.5f - width / 2,
-                    ControlPoints = new List<Vector2>
+                    ControlPoints = new[]
                     {
                         Vector2.Zero,
                         new Vector2(width * CatchPlayfield.BASE_WIDTH, 0)
                     },
-                    CurveType = CurveType.Linear,
+                    PathType = PathType.Linear,
                     Distance = width * CatchPlayfield.BASE_WIDTH,
                     StartTime = i * 2000,
                     NewCombo = i % 8 == 0

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

@@ -35,7 +35,7 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
                     StartTime = obj.StartTime,
                     Samples = obj.Samples,
                     ControlPoints = curveData.ControlPoints,
-                    CurveType = curveData.CurveType,
+                    PathType = curveData.PathType,
                     Distance = curveData.Distance,
                     NodeSamples = curveData.NodeSamples,
                     RepeatCount = curveData.RepeatCount,

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

@@ -50,7 +50,7 @@ namespace osu.Game.Rulesets.Catch.Objects
             if (TickDistance == 0)
                 return;
 
-            var length = Curve.Distance;
+            var length = Path.Distance;
             var tickDistance = Math.Min(TickDistance, length);
             var spanDuration = length / Velocity;
 
@@ -95,7 +95,7 @@ namespace osu.Game.Rulesets.Catch.Objects
                         AddNested(new TinyDroplet
                         {
                             StartTime = t,
-                            X = X + Curve.PositionAt(progress).X / CatchPlayfield.BASE_WIDTH,
+                            X = X + Path.PositionAt(progress).X / CatchPlayfield.BASE_WIDTH,
                             Samples = new List<SampleInfo>(Samples.Select(s => new SampleInfo
                             {
                                 Bank = s.Bank,
@@ -110,7 +110,7 @@ namespace osu.Game.Rulesets.Catch.Objects
                         AddNested(new Droplet
                         {
                             StartTime = time,
-                            X = X + Curve.PositionAt(distanceProgress).X / CatchPlayfield.BASE_WIDTH,
+                            X = X + Path.PositionAt(distanceProgress).X / CatchPlayfield.BASE_WIDTH,
                             Samples = new List<SampleInfo>(Samples.Select(s => new SampleInfo
                             {
                                 Bank = s.Bank,
@@ -127,12 +127,12 @@ namespace osu.Game.Rulesets.Catch.Objects
                 {
                     Samples = Samples,
                     StartTime = spanStartTime + spanDuration,
-                    X = X + Curve.PositionAt(reversed ? 0 : 1).X / CatchPlayfield.BASE_WIDTH
+                    X = X + Path.PositionAt(reversed ? 0 : 1).X / CatchPlayfield.BASE_WIDTH
                 });
             }
         }
 
-        public double EndTime => StartTime + this.SpanCount() * Curve.Distance / Velocity;
+        public double EndTime => StartTime + this.SpanCount() * Path.Distance / Velocity;
 
         public float EndX => X + this.CurvePositionAt(1).X / CatchPlayfield.BASE_WIDTH;
 
@@ -140,24 +140,24 @@ namespace osu.Game.Rulesets.Catch.Objects
 
         public double Distance
         {
-            get { return Curve.Distance; }
+            get { return Path.Distance; }
-            set { Curve.Distance = value; }
+            set { Path.Distance = value; }
         }
 
-        public SliderCurve Curve { get; } = new SliderCurve();
+        public SliderPath Path { get; } = new SliderPath();
 
-        public List<Vector2> ControlPoints
+        public Vector2[] ControlPoints
         {
-            get { return Curve.ControlPoints; }
+            get { return Path.ControlPoints; }
-            set { Curve.ControlPoints = value; }
+            set { Path.ControlPoints = value; }
         }
 
         public List<List<SampleInfo>> NodeSamples { get; set; } = new List<List<SampleInfo>>();
 
-        public CurveType CurveType
+        public PathType PathType
         {
-            get { return Curve.CurveType; }
+            get { return Path.PathType; }
-            set { Curve.CurveType = value; }
+            set { Path.PathType = value; }
         }
 
         public double? LegacyLastTickOffset { get; set; }

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

@@ -31,7 +31,7 @@ namespace osu.Game.Rulesets.Catch.UI
 
         public override PassThroughInputManager CreateInputManager() => new CatchInputManager(Ruleset.RulesetInfo);
 
-        protected override DrawableHitObject<CatchHitObject> GetVisualRepresentation(CatchHitObject h)
+        public override DrawableHitObject<CatchHitObject> GetVisualRepresentation(CatchHitObject h)
         {
             switch (h)
             {

osu.Game.Rulesets.Mania/Beatmaps/ManiaBeatmapConverter.cs

@@ -48,7 +48,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
                 TargetColumns = (int)Math.Max(1, roundedCircleSize);
             else
             {
-                float percentSliderOrSpinner = (float)beatmap.HitObjects.Count(h => h is IHasEndTime) / beatmap.HitObjects.Count();
+                float percentSliderOrSpinner = (float)beatmap.HitObjects.Count(h => h is IHasEndTime) / beatmap.HitObjects.Count;
                 if (percentSliderOrSpinner < 0.2)
                     TargetColumns = 7;
                 else if (percentSliderOrSpinner < 0.3 || roundedCircleSize >= 5)

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

@@ -112,7 +112,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                     drainTime = 10000;
 
                 BeatmapDifficulty difficulty = OriginalBeatmap.BeatmapInfo.BaseDifficulty;
-                conversionDifficulty = ((difficulty.DrainRate + MathHelper.Clamp(difficulty.ApproachRate, 4, 7)) / 1.5 + (double)OriginalBeatmap.HitObjects.Count() / drainTime * 9f) / 38f * 5f / 1.15;
+                conversionDifficulty = ((difficulty.DrainRate + MathHelper.Clamp(difficulty.ApproachRate, 4, 7)) / 1.5 + (double)OriginalBeatmap.HitObjects.Count / drainTime * 9f) / 38f * 5f / 1.15;
                 conversionDifficulty = Math.Min(conversionDifficulty.Value, 12);
 
                 return conversionDifficulty.Value;

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

@@ -1,22 +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 System;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Edit.Tools;
-using osu.Game.Rulesets.Mania.Edit.Layers.Selection.Overlays;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Mania.Objects.Drawables;
 using osu.Game.Rulesets.Objects.Drawables;
-using osu.Game.Rulesets.UI;
 using System.Collections.Generic;
 using osu.Framework.Allocation;
 using osu.Game.Rulesets.Mania.Configuration;
+using osu.Game.Rulesets.Mania.Edit.Masks;
 using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Rulesets.UI;
 
 namespace osu.Game.Rulesets.Mania.Edit
 {
-    public class ManiaHitObjectComposer : HitObjectComposer
+    public class ManiaHitObjectComposer : HitObjectComposer<ManiaHitObject>
     {
         protected new ManiaConfigManager Config => (ManiaConfigManager)base.Config;
 
@@ -32,22 +33,19 @@ namespace osu.Game.Rulesets.Mania.Edit
             return dependencies;
         }
 
-        protected override RulesetContainer CreateRulesetContainer(Ruleset ruleset, WorkingBeatmap beatmap) => new ManiaEditRulesetContainer(ruleset, beatmap);
+        protected override RulesetContainer<ManiaHitObject> CreateRulesetContainer(Ruleset ruleset, WorkingBeatmap beatmap)
+            => new ManiaEditRulesetContainer(ruleset, beatmap);
 
-        protected override IReadOnlyList<ICompositionTool> CompositionTools => new ICompositionTool[]
+        protected override IReadOnlyList<HitObjectCompositionTool> CompositionTools => Array.Empty<HitObjectCompositionTool>();
-        {
-            new HitObjectCompositionTool<Note>("Note"),
-            new HitObjectCompositionTool<HoldNote>("Hold"),
-        };
 
-        public override HitObjectMask CreateMaskFor(DrawableHitObject hitObject)
+        public override SelectionMask CreateMaskFor(DrawableHitObject hitObject)
         {
             switch (hitObject)
             {
                 case DrawableNote note:
-                    return new NoteMask(note);
+                    return new NoteSelectionMask(note);
                 case DrawableHoldNote holdNote:
-                    return new HoldNoteMask(holdNote);
+                    return new HoldNoteSelectionMask(holdNote);
             }
 
             return base.CreateMaskFor(hitObject);

osu.Game.Rulesets.Mania/Edit/Masks/HoldNoteSelectionMask.cs

@@ -13,9 +13,9 @@ using osu.Game.Rulesets.UI.Scrolling;
 using OpenTK;
 using OpenTK.Graphics;
 
-namespace osu.Game.Rulesets.Mania.Edit.Layers.Selection.Overlays
+namespace osu.Game.Rulesets.Mania.Edit.Masks
 {
-    public class HoldNoteMask : HitObjectMask
+    public class HoldNoteSelectionMask : SelectionMask
     {
         public new DrawableHoldNote HitObject => (DrawableHoldNote)base.HitObject;
 
@@ -23,13 +23,13 @@ namespace osu.Game.Rulesets.Mania.Edit.Layers.Selection.Overlays
 
         private readonly BodyPiece body;
 
-        public HoldNoteMask(DrawableHoldNote hold)
+        public HoldNoteSelectionMask(DrawableHoldNote hold)
             : base(hold)
         {
             InternalChildren = new Drawable[]
             {
-                new HoldNoteNoteMask(hold.Head),
+                new HoldNoteNoteSelectionMask(hold.Head),
-                new HoldNoteNoteMask(hold.Tail),
+                new HoldNoteNoteSelectionMask(hold.Tail),
                 body = new BodyPiece
                 {
                     AccentColour = Color4.Transparent
@@ -59,9 +59,9 @@ namespace osu.Game.Rulesets.Mania.Edit.Layers.Selection.Overlays
                 Y -= HitObject.Tail.DrawHeight;
         }
 
-        private class HoldNoteNoteMask : NoteMask
+        private class HoldNoteNoteSelectionMask : NoteSelectionMask
         {
-            public HoldNoteNoteMask(DrawableNote note)
+            public HoldNoteNoteSelectionMask(DrawableNote note)
                 : base(note)
             {
                 Select();

osu.Game.Rulesets.Mania/Edit/Masks/NoteSelectionMask.cs

@@ -7,11 +7,11 @@ using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Mania.Objects.Drawables;
 using osu.Game.Rulesets.Mania.Objects.Drawables.Pieces;
 
-namespace osu.Game.Rulesets.Mania.Edit.Layers.Selection.Overlays
+namespace osu.Game.Rulesets.Mania.Edit.Masks
 {
-    public class NoteMask : HitObjectMask
+    public class NoteSelectionMask : SelectionMask
     {
-        public NoteMask(DrawableNote note)
+        public NoteSelectionMask(DrawableNote note)
             : base(note)
         {
             Scale = note.Scale;

osu.Game.Rulesets.Mania/Mods/ManiaModDualStages.cs

@@ -5,13 +5,11 @@ using System.Collections.Generic;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Mania.Beatmaps;
 using osu.Game.Rulesets.Mania.Objects;
-using osu.Game.Rulesets.Mania.UI;
 using osu.Game.Rulesets.Mods;
-using osu.Game.Rulesets.UI;
 
 namespace osu.Game.Rulesets.Mania.Mods
 {
-    public class ManiaModDualStages : Mod, IPlayfieldTypeMod, IApplicableToBeatmapConverter, IApplicableToRulesetContainer<ManiaHitObject>
+    public class ManiaModDualStages : Mod, IPlayfieldTypeMod, IApplicableToBeatmapConverter, IApplicableToBeatmap<ManiaHitObject>
     {
         public override string Name => "Dual Stages";
         public override string ShortenedName => "DS";
@@ -34,22 +32,21 @@ namespace osu.Game.Rulesets.Mania.Mods
             mbc.TargetColumns *= 2;
         }
 
-        public void ApplyToRulesetContainer(RulesetContainer<ManiaHitObject> rulesetContainer)
+        public void ApplyToBeatmap(Beatmap<ManiaHitObject> beatmap)
         {
-            var mrc = (ManiaRulesetContainer)rulesetContainer;
-
-            // Although this can work, for now let's not allow keymods for mania-specific beatmaps
             if (isForCurrentRuleset)
                 return;
 
+            var maniaBeatmap = (ManiaBeatmap)beatmap;
+
             var newDefinitions = new List<StageDefinition>();
-            foreach (var existing in mrc.Beatmap.Stages)
+            foreach (var existing in maniaBeatmap.Stages)
             {
                 newDefinitions.Add(new StageDefinition { Columns = existing.Columns / 2 });
                 newDefinitions.Add(new StageDefinition { Columns = existing.Columns / 2 });
             }
 
-            mrc.Beatmap.Stages = newDefinitions;
+            maniaBeatmap.Stages = newDefinitions;
         }
 
         public PlayfieldType PlayfieldType => PlayfieldType.Dual;

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

@@ -96,7 +96,7 @@ namespace osu.Game.Rulesets.Mania.UI
 
         public override PassThroughInputManager CreateInputManager() => new ManiaInputManager(Ruleset.RulesetInfo, Variant);
 
-        protected override DrawableHitObject<ManiaHitObject> GetVisualRepresentation(ManiaHitObject h)
+        public override DrawableHitObject<ManiaHitObject> GetVisualRepresentation(ManiaHitObject h)
         {
             switch (h)
             {

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

@@ -0,0 +1,19 @@
+// 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.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseHitCirclePlacementMask : HitObjectPlacementMaskTestCase
+    {
+        protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableHitCircle((HitCircle)hitObject);
+        protected override PlacementMask CreateMask() => new HitCirclePlacementMask();
+    }
+}

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

@@ -0,0 +1,29 @@
+// 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.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseHitCircleSelectionMask : HitObjectSelectionMaskTestCase
+    {
+        private readonly DrawableHitCircle drawableObject;
+
+        public TestCaseHitCircleSelectionMask()
+        {
+            var hitCircle = new HitCircle { Position = new Vector2(256, 192) };
+            hitCircle.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty { CircleSize = 2 });
+
+            Add(drawableObject = new DrawableHitCircle(hitCircle));
+        }
+
+        protected override SelectionMask CreateMask() => new HitCircleSelectionMask(drawableObject);
+    }
+}

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

@@ -108,7 +108,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             {
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(239, 176),
-                ControlPoints = new List<Vector2>
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(154, 28),
@@ -141,7 +141,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             {
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(-(distance / 2), 0),
-                ControlPoints = new List<Vector2>
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(distance, 0),
@@ -161,7 +161,7 @@ namespace osu.Game.Rulesets.Osu.Tests
             {
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(-200, 0),
-                ControlPoints = new List<Vector2>
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(200, 200),
@@ -181,10 +181,10 @@ namespace osu.Game.Rulesets.Osu.Tests
         {
             var slider = new Slider
             {
-                CurveType = CurveType.Linear,
+                PathType = PathType.Linear,
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(-200, 0),
-                ControlPoints = new List<Vector2>
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(150, 75),
@@ -207,10 +207,10 @@ namespace osu.Game.Rulesets.Osu.Tests
         {
             var slider = new Slider
             {
-                CurveType = CurveType.Bezier,
+                PathType = PathType.Bezier,
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(-200, 0),
-                ControlPoints = new List<Vector2>
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(150, 75),
@@ -232,10 +232,10 @@ namespace osu.Game.Rulesets.Osu.Tests
         {
             var slider = new Slider
             {
-                CurveType = CurveType.Linear,
+                PathType = PathType.Linear,
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(0, 0),
-                ControlPoints = new List<Vector2>
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(-200, 0),
@@ -264,8 +264,8 @@ namespace osu.Game.Rulesets.Osu.Tests
             {
                 StartTime = Time.Current + 1000,
                 Position = new Vector2(-100, 0),
-                CurveType = CurveType.Catmull,
+                PathType = PathType.Catmull,
-                ControlPoints = new List<Vector2>
+                ControlPoints = new[]
                 {
                     Vector2.Zero,
                     new Vector2(50, -50),

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

@@ -0,0 +1,19 @@
+// 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.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseSliderPlacementMask : HitObjectPlacementMaskTestCase
+    {
+        protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableSlider((Slider)hitObject);
+        protected override PlacementMask CreateMask() => new SliderPlacementMask();
+    }
+}

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

@@ -0,0 +1,55 @@
+// 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.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks;
+using osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseSliderSelectionMask : HitObjectSelectionMaskTestCase
+    {
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(SliderSelectionMask),
+            typeof(SliderCircleSelectionMask),
+            typeof(SliderBodyPiece),
+            typeof(SliderCircle),
+            typeof(PathControlPointVisualiser),
+            typeof(PathControlPointPiece)
+        };
+
+        private readonly DrawableSlider drawableObject;
+
+        public TestCaseSliderSelectionMask()
+        {
+            var slider = new Slider
+            {
+                Position = new Vector2(256, 192),
+                ControlPoints = new[]
+                {
+                    Vector2.Zero,
+                    new Vector2(150, 150),
+                    new Vector2(300, 0)
+                },
+                PathType = PathType.Bezier,
+                Distance = 350
+            };
+
+            slider.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty { CircleSize = 2 });
+
+            Add(drawableObject = new DrawableSlider(slider));
+        }
+
+        protected override SelectionMask CreateMask() => new SliderSelectionMask(drawableObject);
+    }
+}

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

@@ -0,0 +1,20 @@
+// 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.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.Osu.Edit.Masks.SpinnerMasks;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseSpinnerPlacementMask : HitObjectPlacementMaskTestCase
+    {
+        protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableSpinner((Spinner)hitObject);
+
+        protected override PlacementMask CreateMask() => new SpinnerPlacementMask();
+    }
+}

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

@@ -0,0 +1,50 @@
+// 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.Framework.Graphics.Containers;
+using osu.Game.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Edit.Masks.SpinnerMasks;
+using osu.Game.Rulesets.Osu.Edit.Masks.SpinnerMasks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using osu.Game.Tests.Visual;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Tests
+{
+    public class TestCaseSpinnerSelectionMask : HitObjectSelectionMaskTestCase
+    {
+        public override IReadOnlyList<Type> RequiredTypes => new[]
+        {
+            typeof(SpinnerSelectionMask),
+            typeof(SpinnerPiece)
+        };
+
+        private readonly DrawableSpinner drawableSpinner;
+
+        public TestCaseSpinnerSelectionMask()
+        {
+            var spinner = new Spinner
+            {
+                Position = new Vector2(256, 256),
+                StartTime = -1000,
+                EndTime = 2000
+            };
+            spinner.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty { CircleSize = 2 });
+
+            Add(new Container
+            {
+                RelativeSizeAxes = Axes.Both,
+                Size = new Vector2(0.5f),
+                Child = drawableSpinner = new DrawableSpinner(spinner)
+            });
+        }
+
+        protected override SelectionMask CreateMask() => new SpinnerSelectionMask(drawableSpinner) { Size = new Vector2(0.5f) };
+    }
+}

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

@@ -36,14 +36,17 @@ namespace osu.Game.Rulesets.Osu.Beatmaps
                     StartTime = original.StartTime,
                     Samples = original.Samples,
                     ControlPoints = curveData.ControlPoints,
-                    CurveType = curveData.CurveType,
+                    PathType = curveData.PathType,
                     Distance = curveData.Distance,
                     NodeSamples = curveData.NodeSamples,
                     RepeatCount = curveData.RepeatCount,
                     Position = positionData?.Position ?? Vector2.Zero,
                     NewCombo = comboData?.NewCombo ?? false,
                     ComboOffset = comboData?.ComboOffset ?? 0,
-                    LegacyLastTickOffset = legacyOffset?.LegacyLastTickOffset
+                    LegacyLastTickOffset = legacyOffset?.LegacyLastTickOffset,
+                    // prior to v8, speed multipliers don't adjust for how many ticks are generated over the same distance.
+                    // this results in more (or less) ticks being generated in <v8 maps for the same time duration.
+                    TickDistanceMultiplier = beatmap.BeatmapInfo.BeatmapVersion < 8 ? 1f / beatmap.ControlPointInfo.DifficultyPointAt(original.StartTime).SpeedMultiplier : 1
                 };
             }
             else if (endTimeData != null)

osu.Game.Rulesets.Osu/Difficulty/OsuDifficultyCalculator.cs

@@ -65,7 +65,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
             double hitWindowGreat = (int)(beatmap.HitObjects.First().HitWindows.Great / 2) / timeRate;
             double preempt = (int)BeatmapDifficulty.DifficultyRange(beatmap.BeatmapInfo.BaseDifficulty.ApproachRate, 1800, 1200, 450) / timeRate;
 
-            int maxCombo = beatmap.HitObjects.Count();
+            int maxCombo = beatmap.HitObjects.Count;
             // Add the ticks + tail of the slider. 1 is subtracted because the head circle would be counted twice (once for the slider itself in the line above)
             maxCombo += beatmap.HitObjects.OfType<Slider>().Sum(s => s.NestedHitObjects.Count - 1);
 

osu.Game.Rulesets.Osu/Difficulty/OsuPerformanceCalculator.cs

@@ -34,7 +34,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty
         {
             countHitCircles = Beatmap.HitObjects.Count(h => h is HitCircle);
 
-            beatmapMaxCombo = Beatmap.HitObjects.Count();
+            beatmapMaxCombo = Beatmap.HitObjects.Count;
             // Add the ticks + tail of the slider. 1 is subtracted because the "headcircle" would be counted twice (once for the slider itself in the line above)
             beatmapMaxCombo += Beatmap.HitObjects.OfType<Slider>().Sum(s => s.NestedHitObjects.Count - 1);
         }

osu.Game.Rulesets.Osu/Difficulty/Preprocessing/OsuDifficultyHitObject.cs

@@ -75,15 +75,13 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
             {
                 computeSliderCursorPosition(lastSlider);
                 lastCursorPosition = lastSlider.LazyEndPosition ?? lastCursorPosition;
+
+                TravelDistance = lastSlider.LazyTravelDistance * scalingFactor;
             }
 
             // Don't need to jump to reach spinners
             if (!(BaseObject is Spinner))
                 JumpDistance = (BaseObject.StackedPosition * scalingFactor - lastCursorPosition * scalingFactor).Length;
-
-            // Todo: BUG!!! Last slider's travel distance is considered ONLY IF we ourselves are also a slider!
-            if (BaseObject is Slider)
-                TravelDistance = (lastSlider?.LazyTravelDistance ?? 0) * scalingFactor;
         }
 
         private void setTimingValues()
@@ -110,7 +108,7 @@ namespace osu.Game.Rulesets.Osu.Difficulty.Preprocessing
                     progress = progress % 1;
 
                 // ReSharper disable once PossibleInvalidOperationException (bugged in current r# version)
-                var diff = slider.StackedPosition + slider.Curve.PositionAt(progress) - slider.LazyEndPosition.Value;
+                var diff = slider.StackedPosition + slider.Path.PositionAt(progress) - slider.LazyEndPosition.Value;
                 float dist = diff.Length;
 
                 if (dist > approxFollowCircleRadius)

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

@@ -0,0 +1,20 @@
+// 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.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Tools;
+using osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks;
+using osu.Game.Rulesets.Osu.Objects;
+
+namespace osu.Game.Rulesets.Osu.Edit
+{
+    public class HitCircleCompositionTool : HitObjectCompositionTool
+    {
+        public HitCircleCompositionTool()
+            : base(nameof(HitCircle))
+        {
+        }
+
+        public override PlacementMask CreatePlacementMask() => new HitCirclePlacementMask();
+    }
+}

osu.Game.Rulesets.Osu/Edit/Layers/Selection/Overlays/HitCircleMask.cs

@@ -1,37 +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;
-using osu.Framework.Allocation;
-using osu.Game.Graphics;
-using osu.Game.Rulesets.Edit;
-using osu.Game.Rulesets.Osu.Objects.Drawables;
-using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
-
-namespace osu.Game.Rulesets.Osu.Edit.Layers.Selection.Overlays
-{
-    public class HitCircleMask : HitObjectMask
-    {
-        public HitCircleMask(DrawableHitCircle hitCircle)
-            : base(hitCircle)
-        {
-            Origin = Anchor.Centre;
-
-            Position = hitCircle.Position;
-            Size = hitCircle.Size;
-            Scale = hitCircle.Scale;
-
-            CornerRadius = Size.X / 2;
-
-            AddInternal(new RingPiece());
-
-            hitCircle.HitObject.PositionChanged += _ => Position = hitCircle.Position;
-        }
-
-        [BackgroundDependencyLoader]
-        private void load(OsuColour colours)
-        {
-            Colour = colours.Yellow;
-        }
-    }
-}

osu.Game.Rulesets.Osu/Edit/Layers/Selection/Overlays/SliderCircleMask.cs

@@ -1,61 +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.Allocation;
-using osu.Framework.Graphics;
-using osu.Game.Graphics;
-using osu.Game.Rulesets.Edit;
-using osu.Game.Rulesets.Osu.Objects;
-using osu.Game.Rulesets.Osu.Objects.Drawables;
-using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
-using OpenTK;
-
-namespace osu.Game.Rulesets.Osu.Edit.Layers.Selection.Overlays
-{
-    public class SliderCircleMask : HitObjectMask
-    {
-        public SliderCircleMask(DrawableHitCircle sliderHead, DrawableSlider slider)
-            : this(sliderHead, Vector2.Zero, slider)
-        {
-        }
-
-        public SliderCircleMask(DrawableSliderTail sliderTail, DrawableSlider slider)
-            : this(sliderTail, ((Slider)slider.HitObject).Curve.PositionAt(1), slider)
-        {
-        }
-
-        private readonly DrawableOsuHitObject hitObject;
-
-        private SliderCircleMask(DrawableOsuHitObject hitObject, Vector2 position, DrawableSlider slider)
-            : base(hitObject)
-        {
-            this.hitObject = hitObject;
-
-            Origin = Anchor.Centre;
-
-            Position = position;
-            Size = slider.HeadCircle.Size;
-            Scale = slider.HeadCircle.Scale;
-
-            AddInternal(new RingPiece());
-
-            Select();
-        }
-
-        [BackgroundDependencyLoader]
-        private void load(OsuColour colours)
-        {
-            Colour = colours.Yellow;
-        }
-
-        protected override void Update()
-        {
-            base.Update();
-
-            RelativeAnchorPosition = hitObject.RelativeAnchorPosition;
-        }
-
-        // Todo: This is temporary, since the slider circle masks don't do anything special yet. In the future they will handle input.
-        public override bool HandlePositionalInput => false;
-    }
-}

osu.Game.Rulesets.Osu/Edit/Layers/Selection/Overlays/SliderMask.cs

@@ -1,67 +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.Allocation;
-using osu.Framework.Graphics;
-using osu.Framework.Graphics.Primitives;
-using osu.Game.Graphics;
-using osu.Game.Rulesets.Edit;
-using osu.Game.Rulesets.Osu.Objects;
-using osu.Game.Rulesets.Osu.Objects.Drawables;
-using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
-using OpenTK;
-using OpenTK.Graphics;
-
-namespace osu.Game.Rulesets.Osu.Edit.Layers.Selection.Overlays
-{
-    public class SliderMask : HitObjectMask
-    {
-        private readonly SliderBody body;
-        private readonly DrawableSlider slider;
-
-        public SliderMask(DrawableSlider slider)
-            : base(slider)
-        {
-            this.slider = slider;
-
-            Position = slider.Position;
-
-            var sliderObject = (Slider)slider.HitObject;
-
-            InternalChildren = new Drawable[]
-            {
-                body = new SliderBody(sliderObject)
-                {
-                    AccentColour = Color4.Transparent,
-                    PathWidth = sliderObject.Scale * 64
-                },
-                new SliderCircleMask(slider.HeadCircle, slider),
-                new SliderCircleMask(slider.TailCircle, slider),
-            };
-
-            sliderObject.PositionChanged += _ => Position = slider.Position;
-        }
-
-        [BackgroundDependencyLoader]
-        private void load(OsuColour colours)
-        {
-            body.BorderColour = colours.Yellow;
-        }
-
-        protected override void Update()
-        {
-            base.Update();
-
-            Size = slider.Size;
-            OriginPosition = slider.OriginPosition;
-
-            // Need to cause one update
-            body.UpdateProgress(0);
-        }
-
-        public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => body.ReceivePositionalInputAt(screenSpacePos);
-
-        public override Vector2 SelectionPoint => ToScreenSpace(OriginPosition);
-        public override Quad SelectionQuad => body.PathDrawQuad;
-    }
-}

osu.Game.Rulesets.Osu/Edit/Masks/HitCircleMasks/Components/HitCirclePiece.cs

@@ -0,0 +1,44 @@
+// 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.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks.Components
+{
+    public class HitCirclePiece : CompositeDrawable
+    {
+        private readonly HitCircle hitCircle;
+
+        public HitCirclePiece(HitCircle hitCircle)
+        {
+            this.hitCircle = hitCircle;
+            Origin = Anchor.Centre;
+
+            Size = new Vector2((float)OsuHitObject.OBJECT_RADIUS * 2);
+            Scale = new Vector2(hitCircle.Scale);
+            CornerRadius = Size.X / 2;
+
+            InternalChild = new RingPiece();
+
+            hitCircle.PositionChanged += _ => UpdatePosition();
+            hitCircle.StackHeightChanged += _ => UpdatePosition();
+            hitCircle.ScaleChanged += _ => Scale = new Vector2(hitCircle.Scale);
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            Colour = colours.Yellow;
+
+            UpdatePosition();
+        }
+
+        protected virtual void UpdatePosition() => Position = hitCircle.StackedPosition;
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/HitCircleMasks/HitCirclePlacementMask.cs

@@ -0,0 +1,42 @@
+// 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.Input.Events;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks
+{
+    public class HitCirclePlacementMask : PlacementMask
+    {
+        public new HitCircle HitObject => (HitCircle)base.HitObject;
+
+        public HitCirclePlacementMask()
+            : base(new HitCircle())
+        {
+            InternalChild = new HitCirclePiece(HitObject);
+        }
+
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            // Fixes a 1-frame position discrpancy due to the first mouse move event happening in the next frame
+            HitObject.Position = GetContainingInputManager().CurrentState.Mouse.Position;
+        }
+
+        protected override bool OnClick(ClickEvent e)
+        {
+            HitObject.StartTime = EditorClock.CurrentTime;
+            EndPlacement();
+            return true;
+        }
+
+        protected override bool OnMouseMove(MouseMoveEvent e)
+        {
+            HitObject.Position = e.MousePosition;
+            return true;
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/HitCircleMasks/HitCircleSelectionMask.cs

@@ -0,0 +1,19 @@
+// 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.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks
+{
+    public class HitCircleSelectionMask : SelectionMask
+    {
+        public HitCircleSelectionMask(DrawableHitCircle hitCircle)
+            : base(hitCircle)
+        {
+            InternalChild = new HitCirclePiece((HitCircle)hitCircle.HitObject);
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SliderMasks/Components/PathControlPointPiece.cs

@@ -0,0 +1,113 @@
+// 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.Linq;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Lines;
+using osu.Framework.Graphics.Shapes;
+using osu.Framework.Input.Events;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Osu.Objects;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks.Components
+{
+    public class PathControlPointPiece : CompositeDrawable
+    {
+        private readonly Slider slider;
+        private readonly int index;
+
+        private readonly Path path;
+        private readonly CircularContainer marker;
+
+        [Resolved]
+        private OsuColour colours { get; set; }
+
+        public PathControlPointPiece(Slider slider, int index)
+        {
+            this.slider = slider;
+            this.index = index;
+
+            Origin = Anchor.Centre;
+            AutoSizeAxes = Axes.Both;
+
+            InternalChildren = new Drawable[]
+            {
+                path = new SmoothPath
+                {
+                    Anchor = Anchor.Centre,
+                    PathWidth = 1
+                },
+                marker = new CircularContainer
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre,
+                    Size = new Vector2(10),
+                    Masking = true,
+                    Child = new Box { RelativeSizeAxes = Axes.Both }
+                }
+            };
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            Position = slider.StackedPosition + slider.ControlPoints[index];
+
+            marker.Colour = isSegmentSeparator ? colours.Red : colours.Yellow;
+
+            path.ClearVertices();
+
+            if (index != slider.ControlPoints.Length - 1)
+            {
+                path.AddVertex(Vector2.Zero);
+                path.AddVertex(slider.ControlPoints[index + 1] - slider.ControlPoints[index]);
+            }
+
+            path.OriginPosition = path.PositionInBoundingBox(Vector2.Zero);
+        }
+
+        public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => marker.ReceivePositionalInputAt(screenSpacePos);
+
+        protected override bool OnDragStart(DragStartEvent e) => true;
+
+        protected override bool OnDrag(DragEvent e)
+        {
+            var newControlPoints = slider.ControlPoints.ToArray();
+
+            if (index == 0)
+            {
+                // Special handling for the head - only the position of the slider changes
+                slider.Position += e.Delta;
+
+                // Since control points are relative to the position of the slider, they all need to be offset backwards by the delta
+                for (int i = 1; i < newControlPoints.Length; i++)
+                    newControlPoints[i] -= e.Delta;
+            }
+            else
+                newControlPoints[index] += e.Delta;
+
+            if (isSegmentSeparatorWithNext)
+                newControlPoints[index + 1] = newControlPoints[index];
+
+            if (isSegmentSeparatorWithPrevious)
+                newControlPoints[index - 1] = newControlPoints[index];
+
+            slider.ControlPoints = newControlPoints;
+            slider.Path.Calculate(true);
+
+            return true;
+        }
+
+        protected override bool OnDragEnd(DragEndEvent e) => true;
+
+        private bool isSegmentSeparator => isSegmentSeparatorWithNext || isSegmentSeparatorWithPrevious;
+
+        private bool isSegmentSeparatorWithNext => index < slider.ControlPoints.Length - 1 && slider.ControlPoints[index + 1] == slider.ControlPoints[index];
+
+        private bool isSegmentSeparatorWithPrevious => index > 0 && slider.ControlPoints[index - 1] == slider.ControlPoints[index];
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SliderMasks/Components/PathControlPointVisualiser.cs

@@ -0,0 +1,34 @@
+// 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;
+using osu.Game.Rulesets.Osu.Objects;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks.Components
+{
+    public class PathControlPointVisualiser : CompositeDrawable
+    {
+        private readonly Slider slider;
+
+        private readonly Container<PathControlPointPiece> pieces;
+
+        public PathControlPointVisualiser(Slider slider)
+        {
+            this.slider = slider;
+
+            InternalChild = pieces = new Container<PathControlPointPiece> { RelativeSizeAxes = Axes.Both };
+
+            slider.ControlPointsChanged += _ => updatePathControlPoints();
+            updatePathControlPoints();
+        }
+
+        private void updatePathControlPoints()
+        {
+            while (slider.ControlPoints.Length > pieces.Count)
+                pieces.Add(new PathControlPointPiece(slider, pieces.Count));
+            while (slider.ControlPoints.Length < pieces.Count)
+                pieces.Remove(pieces[pieces.Count - 1]);
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SliderMasks/Components/SliderBodyPiece.cs

@@ -0,0 +1,59 @@
+// 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 osu.Framework.Allocation;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
+using OpenTK;
+using OpenTK.Graphics;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks.Components
+{
+    public class SliderBodyPiece : CompositeDrawable
+    {
+        private readonly Slider slider;
+        private readonly ManualSliderBody body;
+
+        public SliderBodyPiece(Slider slider)
+        {
+            this.slider = slider;
+
+            InternalChild = body = new ManualSliderBody
+            {
+                AccentColour = Color4.Transparent,
+                PathWidth = slider.Scale * 64
+            };
+
+            slider.PositionChanged += _ => updatePosition();
+            slider.ScaleChanged += _ => body.PathWidth = slider.Scale * 64;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            body.BorderColour = colours.Yellow;
+
+            updatePosition();
+        }
+
+        private void updatePosition() => Position = slider.StackedPosition;
+
+        protected override void Update()
+        {
+            base.Update();
+
+            slider.Path.Calculate();
+
+            var vertices = new List<Vector2>();
+            slider.Path.GetPathToProgress(vertices, 0, 1);
+
+            body.SetVertices(vertices);
+
+            Size = body.Size;
+            OriginPosition = body.PathOffset;
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SliderMasks/Components/SliderCirclePiece.cs

@@ -0,0 +1,36 @@
+// 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.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks.Components
+{
+    public class SliderCirclePiece : HitCirclePiece
+    {
+        private readonly Slider slider;
+        private readonly SliderPosition position;
+
+        public SliderCirclePiece(Slider slider, SliderPosition position)
+            : base(slider.HeadCircle)
+        {
+            this.slider = slider;
+            this.position = position;
+
+            slider.ControlPointsChanged += _ => UpdatePosition();
+        }
+
+        protected override void UpdatePosition()
+        {
+            switch (position)
+            {
+                case SliderPosition.Start:
+                    Position = slider.StackedPosition + slider.Path.PositionAt(0);
+                    break;
+                case SliderPosition.End:
+                    Position = slider.StackedPosition + slider.Path.PositionAt(1);
+                    break;
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SliderMasks/SliderCircleSelectionMask.cs

@@ -0,0 +1,24 @@
+// 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.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks
+{
+    public class SliderCircleSelectionMask : SelectionMask
+    {
+        public SliderCircleSelectionMask(DrawableOsuHitObject hitObject, Slider slider, SliderPosition position)
+            : base(hitObject)
+        {
+            InternalChild = new SliderCirclePiece(slider, position);
+
+            Select();
+        }
+
+        // Todo: This is temporary, since the slider circle masks don't do anything special yet. In the future they will handle input.
+        public override bool HandlePositionalInput => false;
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SliderMasks/SliderPlacementMask.cs

@@ -0,0 +1,180 @@
+// 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 osu.Framework.Allocation;
+using osu.Framework.Extensions.IEnumerableExtensions;
+using osu.Framework.Graphics;
+using osu.Framework.Input.Events;
+using osu.Framework.MathUtils;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Objects.Types;
+using osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks.Components;
+using OpenTK;
+using OpenTK.Input;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks
+{
+    public class SliderPlacementMask : PlacementMask
+    {
+        public new Objects.Slider HitObject => (Objects.Slider)base.HitObject;
+
+        private readonly List<Segment> segments = new List<Segment>();
+        private Vector2 cursor;
+
+        private PlacementState state;
+
+        public SliderPlacementMask()
+            : base(new Objects.Slider())
+        {
+            RelativeSizeAxes = Axes.Both;
+            segments.Add(new Segment(Vector2.Zero));
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            InternalChildren = new Drawable[]
+            {
+                new SliderBodyPiece(HitObject),
+                new SliderCirclePiece(HitObject, SliderPosition.Start),
+                new SliderCirclePiece(HitObject, SliderPosition.End),
+                new PathControlPointVisualiser(HitObject),
+            };
+
+            setState(PlacementState.Initial);
+        }
+
+        protected override bool OnMouseMove(MouseMoveEvent e)
+        {
+            switch (state)
+            {
+                case PlacementState.Initial:
+                    HitObject.Position = e.MousePosition;
+                    return true;
+                case PlacementState.Body:
+                    cursor = e.MousePosition - HitObject.Position;
+                    return true;
+            }
+
+            return false;
+        }
+
+        protected override bool OnClick(ClickEvent e)
+        {
+            switch (state)
+            {
+                case PlacementState.Initial:
+                    beginCurve();
+                    break;
+                case PlacementState.Body:
+                    switch (e.Button)
+                    {
+                        case MouseButton.Left:
+                            segments.Last().ControlPoints.Add(cursor);
+                            break;
+                    }
+
+                    break;
+            }
+
+            return true;
+        }
+
+        protected override bool OnMouseUp(MouseUpEvent e)
+        {
+            if (state == PlacementState.Body && e.Button == MouseButton.Right)
+                endCurve();
+            return base.OnMouseUp(e);
+        }
+
+        protected override bool OnDoubleClick(DoubleClickEvent e)
+        {
+            segments.Add(new Segment(segments[segments.Count - 1].ControlPoints.Last()));
+            return true;
+        }
+
+        private void beginCurve()
+        {
+            BeginPlacement();
+
+            HitObject.StartTime = EditorClock.CurrentTime;
+            setState(PlacementState.Body);
+        }
+
+        private void endCurve()
+        {
+            updateSlider();
+            EndPlacement();
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+            updateSlider();
+        }
+
+        private void updateSlider()
+        {
+            for (int i = 0; i < segments.Count; i++)
+                segments[i].Calculate(i == segments.Count - 1 ? (Vector2?)cursor : null);
+
+            HitObject.ControlPoints = segments.SelectMany(s => s.ControlPoints).Concat(cursor.Yield()).ToArray();
+            HitObject.PathType = HitObject.ControlPoints.Length > 2 ? PathType.Bezier : PathType.Linear;
+            HitObject.Distance = segments.Sum(s => s.Distance);
+        }
+
+        private void setState(PlacementState newState)
+        {
+            state = newState;
+        }
+
+        private enum PlacementState
+        {
+            Initial,
+            Body,
+        }
+
+        private class Segment
+        {
+            public float Distance { get; private set; }
+
+            public readonly List<Vector2> ControlPoints = new List<Vector2>();
+
+            public Segment(Vector2 offset)
+            {
+                ControlPoints.Add(offset);
+            }
+
+            public void Calculate(Vector2? cursor = null)
+            {
+                Span<Vector2> allControlPoints = stackalloc Vector2[ControlPoints.Count + (cursor.HasValue ? 1 : 0)];
+
+                for (int i = 0; i < ControlPoints.Count; i++)
+                    allControlPoints[i] = ControlPoints[i];
+                if (cursor.HasValue)
+                    allControlPoints[allControlPoints.Length - 1] = cursor.Value;
+
+                List<Vector2> result;
+
+                switch (allControlPoints.Length)
+                {
+                    case 1:
+                    case 2:
+                        result = PathApproximator.ApproximateLinear(allControlPoints);
+                        break;
+                    default:
+                        result = PathApproximator.ApproximateBezier(allControlPoints);
+                        break;
+                }
+
+                Distance = 0;
+                for (int i = 0; i < result.Count - 1; i++)
+                    Distance += Vector2.Distance(result[i], result[i + 1]);
+            }
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SliderMasks/SliderPosition.cs

@@ -0,0 +1,11 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks
+{
+    public enum SliderPosition
+    {
+        Start,
+        End
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SliderMasks/SliderSelectionMask.cs

@@ -0,0 +1,33 @@
+// 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.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks
+{
+    public class SliderSelectionMask : SelectionMask
+    {
+        private readonly SliderCircleSelectionMask headMask;
+
+        public SliderSelectionMask(DrawableSlider slider)
+            : base(slider)
+        {
+            var sliderObject = (Slider)slider.HitObject;
+
+            InternalChildren = new Drawable[]
+            {
+                new SliderBodyPiece(sliderObject),
+                headMask = new SliderCircleSelectionMask(slider.HeadCircle, sliderObject, SliderPosition.Start),
+                new SliderCircleSelectionMask(slider.TailCircle, sliderObject, SliderPosition.End),
+                new PathControlPointVisualiser(sliderObject),
+            };
+        }
+
+        public override Vector2 SelectionPoint => headMask.SelectionPoint;
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SpinnerMasks/Components/SpinnerPiece.cs

@@ -0,0 +1,66 @@
+// 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.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.Graphics.Shapes;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables.Pieces;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SpinnerMasks.Components
+{
+    public class SpinnerPiece : CompositeDrawable
+    {
+        private readonly Spinner spinner;
+        private readonly CircularContainer circle;
+
+        public SpinnerPiece(Spinner spinner)
+        {
+            this.spinner = spinner;
+
+            Origin = Anchor.Centre;
+
+            RelativeSizeAxes = Axes.Both;
+            FillMode = FillMode.Fit;
+            Size = new Vector2(1.3f);
+
+            RingPiece ring;
+            InternalChildren = new Drawable[]
+            {
+                circle = new CircularContainer
+                {
+                    RelativeSizeAxes = Axes.Both,
+                    Masking = true,
+                    Alpha = 0.5f,
+                    Child = new Box { RelativeSizeAxes = Axes.Both }
+                },
+                ring = new RingPiece
+                {
+                    Anchor = Anchor.Centre,
+                    Origin = Anchor.Centre
+                }
+            };
+
+            ring.Scale = new Vector2(spinner.Scale);
+
+            spinner.PositionChanged += _ => updatePosition();
+            spinner.StackHeightChanged += _ => updatePosition();
+            spinner.ScaleChanged += _ => ring.Scale = new Vector2(spinner.Scale);
+
+            updatePosition();
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            Colour = colours.Yellow;
+        }
+
+        private void updatePosition() => Position = spinner.Position;
+
+        public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => circle.ReceivePositionalInputAt(screenSpacePos);
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SpinnerMasks/SpinnerPlacementMask.cs

@@ -0,0 +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 osu.Framework.Graphics;
+using osu.Framework.Input.Events;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Edit.Masks.SpinnerMasks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.UI;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SpinnerMasks
+{
+    public class SpinnerPlacementMask : PlacementMask
+    {
+        public new Spinner HitObject => (Spinner)base.HitObject;
+
+        private readonly SpinnerPiece piece;
+
+        private bool isPlacingEnd;
+
+        public SpinnerPlacementMask()
+            : base(new Spinner { Position = OsuPlayfield.BASE_SIZE / 2 })
+        {
+            InternalChild = piece = new SpinnerPiece(HitObject) { Alpha = 0.5f };
+        }
+
+        protected override bool OnClick(ClickEvent e)
+        {
+            if (isPlacingEnd)
+            {
+                HitObject.EndTime = EditorClock.CurrentTime;
+                EndPlacement();
+            }
+            else
+            {
+                HitObject.StartTime = EditorClock.CurrentTime;
+
+                isPlacingEnd = true;
+                piece.FadeTo(1f, 150, Easing.OutQuint);
+            }
+
+            return true;
+        }
+    }
+}

osu.Game.Rulesets.Osu/Edit/Masks/SpinnerMasks/SpinnerSelectionMask.cs

@@ -0,0 +1,24 @@
+// 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.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Osu.Edit.Masks.SpinnerMasks.Components;
+using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Rulesets.Osu.Objects.Drawables;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Edit.Masks.SpinnerMasks
+{
+    public class SpinnerSelectionMask : SelectionMask
+    {
+        private readonly SpinnerPiece piece;
+
+        public SpinnerSelectionMask(DrawableSpinner spinner)
+            : base(spinner)
+        {
+            InternalChild = piece = new SpinnerPiece((Spinner)spinner.HitObject);
+        }
+
+        public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => piece.ReceivePositionalInputAt(screenSpacePos);
+    }
+}

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

@@ -8,7 +8,9 @@ using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Edit.Tools;
 using osu.Game.Rulesets.Objects.Drawables;
-using osu.Game.Rulesets.Osu.Edit.Layers.Selection.Overlays;
+using osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks;
+using osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks;
+using osu.Game.Rulesets.Osu.Edit.Masks.SpinnerMasks;
 using osu.Game.Rulesets.Osu.Objects;
 using osu.Game.Rulesets.Osu.Objects.Drawables;
 using osu.Game.Rulesets.Osu.UI;
@@ -16,32 +18,35 @@ using osu.Game.Rulesets.UI;
 
 namespace osu.Game.Rulesets.Osu.Edit
 {
-    public class OsuHitObjectComposer : HitObjectComposer
+    public class OsuHitObjectComposer : HitObjectComposer<OsuHitObject>
     {
         public OsuHitObjectComposer(Ruleset ruleset)
             : base(ruleset)
         {
         }
 
-        protected override RulesetContainer CreateRulesetContainer(Ruleset ruleset, WorkingBeatmap beatmap) => new OsuEditRulesetContainer(ruleset, beatmap);
+        protected override RulesetContainer<OsuHitObject> CreateRulesetContainer(Ruleset ruleset, WorkingBeatmap beatmap)
+            => new OsuEditRulesetContainer(ruleset, beatmap);
 
-        protected override IReadOnlyList<ICompositionTool> CompositionTools => new ICompositionTool[]
+        protected override IReadOnlyList<HitObjectCompositionTool> CompositionTools => new HitObjectCompositionTool[]
         {
-            new HitObjectCompositionTool<HitCircle>(),
+            new HitCircleCompositionTool(),
-            new HitObjectCompositionTool<Slider>(),
+            new SliderCompositionTool(),
-            new HitObjectCompositionTool<Spinner>()
+            new SpinnerCompositionTool()
         };
 
         protected override Container CreateLayerContainer() => new PlayfieldAdjustmentContainer { RelativeSizeAxes = Axes.Both };
 
-        public override HitObjectMask CreateMaskFor(DrawableHitObject hitObject)
+        public override SelectionMask CreateMaskFor(DrawableHitObject hitObject)
         {
             switch (hitObject)
             {
                 case DrawableHitCircle circle:
-                    return new HitCircleMask(circle);
+                    return new HitCircleSelectionMask(circle);
                 case DrawableSlider slider:
-                    return new SliderMask(slider);
+                    return new SliderSelectionMask(slider);
+                case DrawableSpinner spinner:
+                    return new SpinnerSelectionMask(spinner);
             }
 
             return base.CreateMaskFor(hitObject);

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

@@ -0,0 +1,20 @@
+// 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.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Tools;
+using osu.Game.Rulesets.Osu.Edit.Masks.SliderMasks;
+using osu.Game.Rulesets.Osu.Objects;
+
+namespace osu.Game.Rulesets.Osu.Edit
+{
+    public class SliderCompositionTool : HitObjectCompositionTool
+    {
+        public SliderCompositionTool()
+            : base(nameof(Slider))
+        {
+        }
+
+        public override PlacementMask CreatePlacementMask() => new SliderPlacementMask();
+    }
+}

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

@@ -0,0 +1,20 @@
+// 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.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Tools;
+using osu.Game.Rulesets.Osu.Edit.Masks.SpinnerMasks;
+using osu.Game.Rulesets.Osu.Objects;
+
+namespace osu.Game.Rulesets.Osu.Edit
+{
+    public class SpinnerCompositionTool : HitObjectCompositionTool
+    {
+        public SpinnerCompositionTool()
+            : base(nameof(Spinner))
+        {
+        }
+
+        public override PlacementMask CreatePlacementMask() => new SpinnerPlacementMask();
+    }
+}

osu.Game.Rulesets.Osu/Mods/OsuModHardRock.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.Collections.Generic;
 using System.Linq;
 using osu.Framework.Extensions.IEnumerableExtensions;
 using osu.Game.Rulesets.Mods;
@@ -33,11 +32,12 @@ namespace osu.Game.Rulesets.Osu.Mods
             slider.NestedHitObjects.OfType<SliderTick>().ForEach(h => h.Position = new Vector2(h.Position.X, OsuPlayfield.BASE_SIZE.Y - h.Position.Y));
             slider.NestedHitObjects.OfType<RepeatPoint>().ForEach(h => h.Position = new Vector2(h.Position.X, OsuPlayfield.BASE_SIZE.Y - h.Position.Y));
 
-            var newControlPoints = new List<Vector2>();
+            var newControlPoints = new Vector2[slider.ControlPoints.Length];
-            slider.ControlPoints.ForEach(c => newControlPoints.Add(new Vector2(c.X, -c.Y)));
+            for (int i = 0; i < slider.ControlPoints.Length; i++)
+                newControlPoints[i] = new Vector2(slider.ControlPoints[i].X, -slider.ControlPoints[i].Y);
 
             slider.ControlPoints = newControlPoints;
-            slider.Curve?.Calculate(); // Recalculate the slider curve
+            slider.Path?.Calculate(); // Recalculate the slider curve
         }
     }
 }

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

@@ -61,6 +61,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             Size = circle.DrawSize;
 
             HitObject.PositionChanged += _ => Position = HitObject.StackedPosition;
+            HitObject.StackHeightChanged += _ => Position = HitObject.StackedPosition;
+            HitObject.ScaleChanged += s => Scale = new Vector2(s);
         }
 
         public override Color4 AccentColour

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

@@ -23,7 +23,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
         public readonly DrawableHitCircle HeadCircle;
         public readonly DrawableSliderTail TailCircle;
 
-        public readonly SliderBody Body;
+        public readonly SnakingSliderBody Body;
         public readonly SliderBall Ball;
 
         public DrawableSlider(Slider s)
@@ -38,7 +38,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             InternalChildren = new Drawable[]
             {
-                Body = new SliderBody(s)
+                Body = new SnakingSliderBody(s)
                 {
                     PathWidth = s.Scale * 64,
                 },
@@ -85,6 +85,13 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             }
 
             HitObject.PositionChanged += _ => Position = HitObject.StackedPosition;
+            HitObject.ScaleChanged += _ =>
+            {
+                Body.PathWidth = HitObject.Scale * 64;
+                Ball.Scale = new Vector2(HitObject.Scale);
+            };
+
+            slider.ControlPointsChanged += _ => Body.Refresh();
         }
 
         public override Color4 AccentColour
@@ -119,7 +126,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             double completionProgress = MathHelper.Clamp((Time.Current - slider.StartTime) / slider.Duration, 0, 1);
 
             foreach (var c in components.OfType<ISliderProgress>()) c.UpdateProgress(completionProgress);
-            foreach (var c in components.OfType<ITrackSnaking>()) c.UpdateSnakingPosition(slider.Curve.PositionAt(Body.SnakedStart ?? 0), slider.Curve.PositionAt(Body.SnakedEnd ?? 0));
+            foreach (var c in components.OfType<ITrackSnaking>()) c.UpdateSnakingPosition(slider.Path.PositionAt(Body.SnakedStart ?? 0), slider.Path.PositionAt(Body.SnakedEnd ?? 0));
             foreach (var t in components.OfType<IRequireTracking>()) t.Tracking = Ball.Tracking;
 
             Size = Body.Size;

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

@@ -16,7 +16,10 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
         {
             this.slider = slider;
 
-            Position = HitObject.Position - slider.Position;
+            h.PositionChanged += _ => updatePosition();
+            slider.ControlPointsChanged += _ => updatePosition();
+
+            updatePosition();
         }
 
         protected override void Update()
@@ -33,5 +36,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
         public Action<double> OnShake;
 
         protected override void Shake(double maximumLength) => OnShake?.Invoke(maximumLength);
+
+        private void updatePosition() => Position = HitObject.Position - slider.Position;
     }
 }

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

@@ -8,6 +8,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 {
     public class DrawableSliderTail : DrawableOsuHitObject, IRequireTracking
     {
+        private readonly Slider slider;
+
         /// <summary>
         /// The judgement text is provided by the <see cref="DrawableSlider"/>.
         /// </summary>
@@ -18,6 +20,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
         public DrawableSliderTail(Slider slider, SliderTailCircle hitCircle)
             : base(hitCircle)
         {
+            this.slider = slider;
+
             Origin = Anchor.Centre;
 
             RelativeSizeAxes = Axes.Both;
@@ -25,7 +29,10 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
             AlwaysPresent = true;
 
-            Position = HitObject.Position - slider.Position;
+            hitCircle.PositionChanged += _ => updatePosition();
+            slider.ControlPointsChanged += _ => updatePosition();
+
+            updatePosition();
         }
 
         protected override void CheckForResult(bool userTriggered, double timeOffset)
@@ -33,5 +40,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
             if (!userTriggered && timeOffset >= 0)
                 ApplyResult(r => r.Type = Tracking ? HitResult.Great : HitResult.Miss);
         }
+
+        private void updatePosition() => Position = HitObject.Position - slider.Position;
     }
 }

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

@@ -112,6 +112,8 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
                     Alpha = 0
                 }
             };
+
+            s.PositionChanged += _ => Position = s.Position;
         }
 
         public float Progress => MathHelper.Clamp(Disc.RotationAbsolute / 360 / Spinner.SpinsRequired, 0, 1);
@@ -167,7 +169,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables
 
         protected override void Update()
         {
-            Disc.Tracking = OsuActionInputManager.PressedActions.Any(x => x == OsuAction.LeftButton || x == OsuAction.RightButton);
+            Disc.Tracking = OsuActionInputManager?.PressedActions.Any(x => x == OsuAction.LeftButton || x == OsuAction.RightButton) ?? false;
             if (!spmCounter.IsPresent && Disc.Tracking)
                 spmCounter.FadeIn(HitObject.TimeFadeIn);
 

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

@@ -0,0 +1,20 @@
+// 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 OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
+{
+    /// <summary>
+    /// A <see cref="SliderBody"/> with the ability to set the drawn vertices manually.
+    /// </summary>
+    public class ManualSliderBody : SliderBody
+    {
+        public new void SetVertices(IReadOnlyList<Vector2> vertices)
+        {
+            base.SetVertices(vertices);
+            Size = Path.Size;
+        }
+    }
+}

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

@@ -4,7 +4,6 @@
 using osu.Framework.Extensions.Color4Extensions;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
-using osu.Framework.Graphics.Sprites;
 using osu.Game.Graphics.Sprites;
 using OpenTK.Graphics;
 using osu.Framework.Graphics.Shapes;
@@ -14,7 +13,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
 {
     public class NumberPiece : Container
     {
-        private readonly SpriteText number;
+        private readonly SkinnableSpriteText number;
 
         public string Text
         {
@@ -41,15 +40,14 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
                     },
                     Child = new Box()
                 }, s => s.GetTexture("Play/osu/hitcircle") == null),
-                number = new OsuSpriteText
+                number = new SkinnableSpriteText("Play/osu/number-text", _ => new OsuSpriteText
                 {
-                    Text = @"1",
                     Font = @"Venera",
                     UseFullGlyphHeight = false,
-                    Anchor = Anchor.Centre,
-                    Origin = Anchor.Centre,
                     TextSize = 40,
-                    Alpha = 1
+                }, restrictSize: false)
+                {
+                    Text = @"1"
                 }
             };
         }

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

@@ -1,24 +1,22 @@
-// 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;
 using System.Collections.Generic;
-using osu.Framework.Allocation;
-using osu.Framework.Configuration;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Lines;
-using OpenTK.Graphics.ES30;
-using OpenTK.Graphics;
 using osu.Framework.Graphics.Primitives;
-using osu.Game.Rulesets.Objects.Types;
 using OpenTK;
+using OpenTK.Graphics;
+using OpenTK.Graphics.ES30;
 
 namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
 {
-    public class SliderBody : Container, ISliderProgress
+    public abstract class SliderBody : CompositeDrawable
     {
         private readonly SliderPath path;
+        protected Path Path => path;
+
         private readonly BufferedContainer container;
 
         public float PathWidth
@@ -30,15 +28,7 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
         /// <summary>
         /// Offset in absolute coordinates from the start of the curve.
         /// </summary>
-        public Vector2 PathOffset { get; private set; }
+        public virtual Vector2 PathOffset => path.PositionInBoundingBox(path.Vertices[0]);
-
-        public readonly List<Vector2> CurrentCurve = new List<Vector2>();
-
-        public readonly Bindable<bool> SnakingIn = new Bindable<bool>();
-        public readonly Bindable<bool> SnakingOut = new Bindable<bool>();
-
-        public double? SnakedStart { get; private set; }
-        public double? SnakedEnd { get; private set; }
 
         /// <summary>
         /// Used to colour the path.
@@ -74,28 +64,13 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
 
         public Quad PathDrawQuad => container.ScreenSpaceDrawQuad;
 
-        private Vector2 topLeftOffset;
+        protected SliderBody()
-
-        private readonly Slider slider;
-
-        public SliderBody(Slider s)
         {
-            slider = s;
+            InternalChild = container = new BufferedContainer
-
-            Children = new Drawable[]
             {
-                container = new BufferedContainer
+                RelativeSizeAxes = Axes.Both,
-                {
+                CacheDrawnFrameBuffer = true,
-                    RelativeSizeAxes = Axes.Both,
+                Child = path = new SliderPath { Blending = BlendingMode.None }
-                    CacheDrawnFrameBuffer = true,
-                    Children = new Drawable[]
-                    {
-                        path = new SliderPath
-                        {
-                            Blending = BlendingMode.None,
-                        },
-                    }
-                },
             };
 
             container.Attach(RenderbufferInternalFormat.DepthComponent16);
@@ -103,80 +78,14 @@ namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
 
         public override bool ReceivePositionalInputAt(Vector2 screenSpacePos) => path.ReceivePositionalInputAt(screenSpacePos);
 
-        public void SetRange(double p0, double p1)
+        /// <summary>
+        /// Sets the vertices of the path which should be drawn by this <see cref="SliderBody"/>.
+        /// </summary>
+        /// <param name="vertices">The vertices</param>
+        protected void SetVertices(IReadOnlyList<Vector2> vertices)
         {
-            if (p0 > p1)
+            path.Vertices = vertices;
-                MathHelper.Swap(ref p0, ref p1);
+            container.ForceRedraw();
-
-            if (updateSnaking(p0, p1))
-            {
-                // The path is generated such that its size encloses it. This change of size causes the path
-                // to move around while snaking, so we need to offset it to make sure it maintains the
-                // same position as when it is fully snaked.
-                var newTopLeftOffset = path.PositionInBoundingBox(Vector2.Zero);
-                path.Position = topLeftOffset - newTopLeftOffset;
-
-                container.ForceRedraw();
-            }
-        }
-
-        [BackgroundDependencyLoader]
-        private void load()
-        {
-            computeSize();
-        }
-
-        private void computeSize()
-        {
-            // Generate the entire curve
-            slider.Curve.GetPathToProgress(CurrentCurve, 0, 1);
-            foreach (Vector2 p in CurrentCurve)
-                path.AddVertex(p);
-
-            Size = path.Size;
-
-            topLeftOffset = path.PositionInBoundingBox(Vector2.Zero);
-            PathOffset = path.PositionInBoundingBox(CurrentCurve[0]);
-        }
-
-        private bool updateSnaking(double p0, double p1)
-        {
-            if (SnakedStart == p0 && SnakedEnd == p1) return false;
-
-            SnakedStart = p0;
-            SnakedEnd = p1;
-
-            slider.Curve.GetPathToProgress(CurrentCurve, p0, p1);
-
-            path.ClearVertices();
-            foreach (Vector2 p in CurrentCurve)
-                path.AddVertex(p);
-
-            return true;
-        }
-
-        public void UpdateProgress(double completionProgress)
-        {
-            var span = slider.SpanAt(completionProgress);
-            var spanProgress = slider.ProgressAt(completionProgress);
-
-            double start = 0;
-            double end = SnakingIn ? MathHelper.Clamp((Time.Current - (slider.StartTime - slider.TimePreempt)) / slider.TimeFadeIn, 0, 1) : 1;
-
-            if (span >= slider.SpanCount() - 1)
-            {
-                if (Math.Min(span, slider.SpanCount() - 1) % 2 == 1)
-                {
-                    start = 0;
-                    end = SnakingOut ? spanProgress : 1;
-                }
-                else
-                {
-                    start = SnakingOut ? spanProgress : 0;
-                }
-            }
-
-            SetRange(start, end);
         }
 
         private class SliderPath : SmoothPath

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

@@ -0,0 +1,118 @@
+// 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.Allocation;
+using osu.Framework.Configuration;
+using osu.Game.Rulesets.Objects.Types;
+using OpenTK;
+
+namespace osu.Game.Rulesets.Osu.Objects.Drawables.Pieces
+{
+    /// <summary>
+    /// A <see cref="SliderBody"/> which changes its curve depending on the snaking progress.
+    /// </summary>
+    public class SnakingSliderBody : SliderBody, ISliderProgress
+    {
+        public readonly List<Vector2> CurrentCurve = new List<Vector2>();
+
+        public readonly Bindable<bool> SnakingIn = new Bindable<bool>();
+        public readonly Bindable<bool> SnakingOut = new Bindable<bool>();
+
+        public double? SnakedStart { get; private set; }
+        public double? SnakedEnd { get; private set; }
+
+        public override Vector2 PathOffset => snakedPathOffset;
+
+        /// <summary>
+        /// The top-left position of the path when fully snaked.
+        /// </summary>
+        private Vector2 snakedPosition;
+
+        /// <summary>
+        /// The offset of the path from <see cref="snakedPosition"/> when fully snaked.
+        /// </summary>
+        private Vector2 snakedPathOffset;
+
+        private readonly Slider slider;
+
+        public SnakingSliderBody(Slider slider)
+        {
+            this.slider = slider;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load()
+        {
+            Refresh();
+        }
+
+        public void UpdateProgress(double completionProgress)
+        {
+            var span = slider.SpanAt(completionProgress);
+            var spanProgress = slider.ProgressAt(completionProgress);
+
+            double start = 0;
+            double end = SnakingIn ? MathHelper.Clamp((Time.Current - (slider.StartTime - slider.TimePreempt)) / slider.TimeFadeIn, 0, 1) : 1;
+
+            if (span >= slider.SpanCount() - 1)
+            {
+                if (Math.Min(span, slider.SpanCount() - 1) % 2 == 1)
+                {
+                    start = 0;
+                    end = SnakingOut ? spanProgress : 1;
+                }
+                else
+                {
+                    start = SnakingOut ? spanProgress : 0;
+                }
+            }
+
+            setRange(start, end);
+        }
+
+        public void Refresh()
+        {
+            // Generate the entire curve
+            slider.Path.GetPathToProgress(CurrentCurve, 0, 1);
+            SetVertices(CurrentCurve);
+
+            // The body is sized to the full path size to avoid excessive autosize computations
+            Size = Path.Size;
+
+            snakedPosition = Path.PositionInBoundingBox(Vector2.Zero);
+            snakedPathOffset = Path.PositionInBoundingBox(Path.Vertices[0]);
+
+            var lastSnakedStart = SnakedStart ?? 0;
+            var lastSnakedEnd = SnakedEnd ?? 0;
+
+            SnakedStart = null;
+            SnakedEnd = null;
+
+            setRange(lastSnakedStart, lastSnakedEnd);
+        }
+
+        private void setRange(double p0, double p1)
+        {
+            if (p0 > p1)
+                MathHelper.Swap(ref p0, ref p1);
+
+            if (SnakedStart == p0 && SnakedEnd == p1) return;
+
+            SnakedStart = p0;
+            SnakedEnd = p1;
+
+            slider.Path.GetPathToProgress(CurrentCurve, p0, p1);
+
+            SetVertices(CurrentCurve);
+
+            // The bounding box of the path expands as it snakes, which in turn shifts the position of the path.
+            // Depending on the direction of expansion, it may appear as if the path is expanding towards the position of the slider
+            // rather than expanding out from the position of the slider.
+            // To remove this effect, the path's position is shifted towards its final snaked position
+
+            Path.Position = snakedPosition - Path.PositionInBoundingBox(Vector2.Zero);
+        }
+    }
+}

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

@@ -16,13 +16,15 @@ namespace osu.Game.Rulesets.Osu.Objects
         public const double OBJECT_RADIUS = 64;
 
         public event Action<Vector2> PositionChanged;
+        public event Action<int> StackHeightChanged;
+        public event Action<float> ScaleChanged;
 
         public double TimePreempt = 600;
         public double TimeFadeIn = 400;
 
         private Vector2 position;
 
-        public Vector2 Position
+        public virtual Vector2 Position
         {
             get => position;
             set
@@ -44,13 +46,39 @@ namespace osu.Game.Rulesets.Osu.Objects
 
         public Vector2 StackedEndPosition => EndPosition + StackOffset;
 
-        public virtual int StackHeight { get; set; }
+        private int stackHeight;
+
+        public int StackHeight
+        {
+            get => stackHeight;
+            set
+            {
+                if (stackHeight == value)
+                    return;
+                stackHeight = value;
+
+                StackHeightChanged?.Invoke(value);
+            }
+        }
 
         public Vector2 StackOffset => new Vector2(StackHeight * Scale * -6.4f);
 
         public double Radius => OBJECT_RADIUS * Scale;
 
-        public float Scale { get; set; } = 1;
+        private float scale = 1;
+
+        public float Scale
+        {
+            get => scale;
+            set
+            {
+                if (scale == value)
+                    return;
+                scale = value;
+
+                ScaleChanged?.Invoke(value);
+            }
+        }
 
         public virtual bool NewCombo { get; set; }
 

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

@@ -22,7 +22,9 @@ namespace osu.Game.Rulesets.Osu.Objects
         /// </summary>
         private const float base_scoring_distance = 100;
 
-        public double EndTime => StartTime + this.SpanCount() * Curve.Distance / Velocity;
+        public event Action<Vector2[]> ControlPointsChanged;
+
+        public double EndTime => StartTime + this.SpanCount() * Path.Distance / Velocity;
         public double Duration => EndTime - StartTime;
 
         public Vector2 StackedPositionAt(double t) => StackedPosition + this.CurvePositionAt(t);
@@ -50,24 +52,49 @@ namespace osu.Game.Rulesets.Osu.Objects
             }
         }
 
-        public SliderCurve Curve { get; } = new SliderCurve();
+        public SliderPath Path { get; } = new SliderPath();
 
-        public List<Vector2> ControlPoints
+        public Vector2[] ControlPoints
         {
-            get { return Curve.ControlPoints; }
+            get => Path.ControlPoints;
-            set { Curve.ControlPoints = value; }
+            set
+            {
+                if (Path.ControlPoints == value)
+                    return;
+                Path.ControlPoints = value;
+
+                ControlPointsChanged?.Invoke(value);
+
+                if (TailCircle != null)
+                    TailCircle.Position = EndPosition;
+            }
         }
 
-        public CurveType CurveType
+        public PathType PathType
         {
-            get { return Curve.CurveType; }
+            get { return Path.PathType; }
-            set { Curve.CurveType = value; }
+            set { Path.PathType = value; }
         }
 
         public double Distance
         {
-            get { return Curve.Distance; }
+            get { return Path.Distance; }
-            set { Curve.Distance = value; }
+            set { Path.Distance = value; }
+        }
+
+        public override Vector2 Position
+        {
+            get => base.Position;
+            set
+            {
+                base.Position = value;
+
+                if (HeadCircle != null)
+                    HeadCircle.Position = value;
+
+                if (TailCircle != null)
+                    TailCircle.Position = EndPosition;
+            }
         }
 
         public double? LegacyLastTickOffset { get; set; }
@@ -93,8 +120,21 @@ namespace osu.Game.Rulesets.Osu.Objects
         /// </summary>
         public double SpanDuration => Duration / this.SpanCount();
 
-        public double Velocity;
+        /// <summary>
-        public double TickDistance;
+        /// Velocity of this <see cref="Slider"/>.
+        /// </summary>
+        public double Velocity { get; private set; }
+
+        /// <summary>
+        /// Spacing between <see cref="SliderTick"/>s of this <see cref="Slider"/>.
+        /// </summary>
+        public double TickDistance { get; private set; }
+
+        /// <summary>
+        /// An extra multiplier that affects the number of <see cref="SliderTick"/>s generated by this <see cref="Slider"/>.
+        /// An increase in this value increases <see cref="TickDistance"/>, which reduces the number of ticks generated.
+        /// </summary>
+        public double TickDistanceMultiplier = 1;
 
         public HitCircle HeadCircle;
         public SliderTailCircle TailCircle;
@@ -109,7 +149,7 @@ namespace osu.Game.Rulesets.Osu.Objects
             double scoringDistance = base_scoring_distance * difficulty.SliderMultiplier * difficultyPoint.SpeedMultiplier;
 
             Velocity = scoringDistance / timingPoint.BeatLength;
-            TickDistance = scoringDistance / difficulty.SliderTickRate;
+            TickDistance = scoringDistance / difficulty.SliderTickRate * TickDistanceMultiplier;
         }
 
         protected override void CreateNestedHitObjects()
@@ -150,7 +190,7 @@ namespace osu.Game.Rulesets.Osu.Objects
 
         private void createTicks()
         {
-            var length = Curve.Distance;
+            var length = Path.Distance;
             var tickDistance = MathHelper.Clamp(TickDistance, 0, length);
 
             if (tickDistance == 0) return;
@@ -189,7 +229,7 @@ namespace osu.Game.Rulesets.Osu.Objects
                         SpanIndex = span,
                         SpanStartTime = spanStartTime,
                         StartTime = spanStartTime + timeProgress * SpanDuration,
-                        Position = Position + Curve.PositionAt(distanceProgress),
+                        Position = Position + Path.PositionAt(distanceProgress),
                         StackHeight = StackHeight,
                         Scale = Scale,
                         Samples = sampleList
@@ -207,7 +247,7 @@ namespace osu.Game.Rulesets.Osu.Objects
                     RepeatIndex = repeatIndex,
                     SpanDuration = SpanDuration,
                     StartTime = StartTime + repeat * SpanDuration,
-                    Position = Position + Curve.PositionAt(repeat % 2),
+                    Position = Position + Path.PositionAt(repeat % 2),
                     StackHeight = StackHeight,
                     Scale = Scale,
                     Samples = getNodeSamples(1 + repeatIndex)

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

@@ -7,6 +7,7 @@ using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Osu.Judgements;
+using OpenTK;
 
 namespace osu.Game.Rulesets.Osu.Objects
 {
@@ -31,5 +32,10 @@ namespace osu.Game.Rulesets.Osu.Objects
         }
 
         public override Judgement CreateJudgement() => new OsuJudgement();
+
+        public override void OffsetPosition(Vector2 offset)
+        {
+            // for now we don't want to allow spinners to be moved around.
+        }
     }
 }

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

@@ -31,7 +31,7 @@ namespace osu.Game.Rulesets.Osu.UI
 
         public override PassThroughInputManager CreateInputManager() => new OsuInputManager(Ruleset.RulesetInfo);
 
-        protected override DrawableHitObject<OsuHitObject> GetVisualRepresentation(OsuHitObject h)
+        public override DrawableHitObject<OsuHitObject> GetVisualRepresentation(OsuHitObject h)
         {
             switch (h)
             {

osu.Game.Rulesets.Taiko/UI/TaikoRulesetContainer.cs

@@ -78,7 +78,7 @@ namespace osu.Game.Rulesets.Taiko.UI
 
         protected override Playfield CreatePlayfield() => new TaikoPlayfield(Beatmap.ControlPointInfo);
 
-        protected override DrawableHitObject<TaikoHitObject> GetVisualRepresentation(TaikoHitObject h)
+        public override DrawableHitObject<TaikoHitObject> GetVisualRepresentation(TaikoHitObject h)
         {
             switch (h)
             {

osu.Game.Tests/Beatmaps/Formats/LegacyBeatmapDecoderTest.cs

@@ -8,12 +8,14 @@ using OpenTK.Graphics;
 using osu.Game.Tests.Resources;
 using System.Linq;
 using osu.Game.Audio;
+using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Beatmaps.Formats;
 using osu.Game.Beatmaps.Timing;
 using osu.Game.Rulesets.Catch.Beatmaps;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Legacy;
+using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Beatmaps;
 using osu.Game.Skinning;
 
@@ -22,6 +24,25 @@ namespace osu.Game.Tests.Beatmaps.Formats
     [TestFixture]
     public class LegacyBeatmapDecoderTest
     {
+        [Test]
+        public void TestDecodeBeatmapVersion()
+        {
+            using (var resStream = Resource.OpenResource("beatmap-version.osu"))
+            using (var stream = new StreamReader(resStream))
+            {
+                var decoder = Decoder.GetDecoder<Beatmap>(stream);
+
+                stream.BaseStream.Position = 0;
+                stream.DiscardBufferedData();
+
+                var working = new TestWorkingBeatmap(decoder.Decode(stream));
+
+                Assert.AreEqual(6, working.BeatmapInfo.BeatmapVersion);
+                Assert.AreEqual(6, working.Beatmap.BeatmapInfo.BeatmapVersion);
+                Assert.AreEqual(6, working.GetPlayableBeatmap(new OsuRuleset().RulesetInfo).BeatmapInfo.BeatmapVersion);
+            }
+        }
+
         [Test]
         public void TestDecodeBeatmapGeneral()
         {

osu.Game.Tests/Resources/beatmap-version.osu

@@ -0,0 +1 @@
+osu file format v6

osu.Game.Tests/Visual/TestCaseHitObjectComposer.cs

@@ -13,14 +13,18 @@ using osu.Game.Rulesets.Edit;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Osu;
 using osu.Game.Rulesets.Osu.Edit;
+using osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks;
+using osu.Game.Rulesets.Osu.Edit.Masks.HitCircleMasks.Components;
 using osu.Game.Rulesets.Osu.Objects;
+using osu.Game.Screens.Edit.Screens.Compose;
 using osu.Game.Screens.Edit.Screens.Compose.Layers;
 using osu.Game.Tests.Beatmaps;
 
 namespace osu.Game.Tests.Visual
 {
     [TestFixture]
-    public class TestCaseHitObjectComposer : OsuTestCase
+    [Cached(Type = typeof(IPlacementHandler))]
+    public class TestCaseHitObjectComposer : OsuTestCase, IPlacementHandler
     {
         public override IReadOnlyList<Type> RequiredTypes => new[]
         {
@@ -29,9 +33,14 @@ namespace osu.Game.Tests.Visual
             typeof(HitObjectComposer),
             typeof(OsuHitObjectComposer),
             typeof(HitObjectMaskLayer),
-            typeof(NotNullAttribute)
+            typeof(NotNullAttribute),
+            typeof(HitCirclePiece),
+            typeof(HitCircleSelectionMask),
+            typeof(HitCirclePlacementMask),
         };
 
+        private HitObjectComposer composer;
+
         [BackgroundDependencyLoader]
         private void load()
         {
@@ -44,14 +53,12 @@ namespace osu.Game.Tests.Visual
                     new Slider
                     {
                         Position = new Vector2(128, 256),
-                        ControlPoints = new List<Vector2>
+                        ControlPoints = new[]
                         {
                             Vector2.Zero,
                             new Vector2(216, 0),
                         },
-                        Distance = 400,
+                        Distance = 216,
-                        Velocity = 1,
-                        TickDistance = 100,
                         Scale = 0.5f,
                     }
                 },
@@ -61,7 +68,15 @@ namespace osu.Game.Tests.Visual
             Dependencies.CacheAs<IAdjustableClock>(clock);
             Dependencies.CacheAs<IFrameBasedClock>(clock);
 
-            Child = new OsuHitObjectComposer(new OsuRuleset());
+            Child = composer = new OsuHitObjectComposer(new OsuRuleset());
         }
+
+        public void BeginPlacement(HitObject hitObject)
+        {
+        }
+
+        public void EndPlacement(HitObject hitObject) => composer.Add(hitObject);
+
+        public void Delete(HitObject hitObject) => composer.Remove(hitObject);
     }
 }

osu.Game.props

@@ -1,7 +1,7 @@
 <!-- Contains required properties for osu!framework projects. -->
 <Project>
   <PropertyGroup Label="C#">
-    <LangVersion>7</LangVersion>
+    <LangVersion>7.2</LangVersion>
   </PropertyGroup>
   <PropertyGroup>
     <ApplicationManifest>..\app.manifest</ApplicationManifest>

osu.Game/Beatmaps/Beatmap.cs

@@ -48,7 +48,7 @@ namespace osu.Game.Beatmaps
         [JsonConverter(typeof(TypedListConverter<HitObject>))]
         public List<T> HitObjects = new List<T>();
 
-        IEnumerable<HitObject> IBeatmap.HitObjects => HitObjects;
+        IReadOnlyList<HitObject> IBeatmap.HitObjects => HitObjects;
 
         public virtual IEnumerable<BeatmapStatistic> GetStatistics() => Enumerable.Empty<BeatmapStatistic>();
 

osu.Game/Beatmaps/BeatmapConverter.cs

@@ -55,39 +55,40 @@ namespace osu.Game.Beatmaps
 
             beatmap.BeatmapInfo = original.BeatmapInfo;
             beatmap.ControlPointInfo = original.ControlPointInfo;
-            beatmap.HitObjects = original.HitObjects.SelectMany(h => convert(h, original)).ToList();
+            beatmap.HitObjects = convertHitObjects(original.HitObjects, original);
             beatmap.Breaks = original.Breaks;
 
             return beatmap;
         }
 
-        /// <summary>
+        private List<T> convertHitObjects(IReadOnlyList<HitObject> hitObjects, IBeatmap beatmap)
-        /// Converts a hit object.
-        /// </summary>
-        /// <param name="original">The hit object to convert.</param>
-        /// <param name="beatmap">The un-converted Beatmap.</param>
-        /// <returns>The converted hit object.</returns>
-        private IEnumerable<T> convert(HitObject original, IBeatmap beatmap)
         {
-            // Check if the hitobject is already the converted type
+            var result = new List<T>(hitObjects.Count);
-            T tObject = original as T;
-            if (tObject != null)
-            {
-                yield return tObject;
-                yield break;
-            }
 
-            var converted = ConvertHitObject(original, beatmap).ToList();
+            foreach (var obj in hitObjects)
-            ObjectConverted?.Invoke(original, converted);
-
-            // Convert the hit object
-            foreach (var obj in converted)
             {
-                if (obj == null)
+                if (obj is T tObj)
+                {
+                    result.Add(tObj);
                     continue;
+                }
 
-                yield return obj;
+                var converted = ConvertHitObject(obj, beatmap);
+
+                if (ObjectConverted != null)
+                {
+                    converted = converted.ToList();
+                    ObjectConverted.Invoke(obj, converted);
+                }
+
+                foreach (var c in converted)
+                {
+                    if (c != null)
+                        result.Add(c);
+                }
             }
+
+            return result;
         }
 
         /// <summary>

osu.Game/Beatmaps/BeatmapInfo.cs

@@ -19,7 +19,6 @@ namespace osu.Game.Beatmaps
         [JsonIgnore]
         public int ID { get; set; }
 
-        //TODO: should be in database
         public int BeatmapVersion;
 
         private int? onlineBeatmapID;

osu.Game/Beatmaps/BeatmapManager.cs

@@ -148,11 +148,12 @@ namespace osu.Game.Beatmaps
         /// </summary>
         /// <param name="beatmapSetInfo">The <see cref="BeatmapSetInfo"/> to be downloaded.</param>
         /// <param name="noVideo">Whether the beatmap should be downloaded without video. Defaults to false.</param>
-        public void Download(BeatmapSetInfo beatmapSetInfo, bool noVideo = false)
+        /// <returns>Downloading can happen</returns>
+        public bool Download(BeatmapSetInfo beatmapSetInfo, bool noVideo = false)
         {
             var existing = GetExistingDownload(beatmapSetInfo);
 
-            if (existing != null || api == null) return;
+            if (existing != null || api == null) return false;
 
             if (!api.LocalUser.Value.IsSupporter)
             {
@@ -161,7 +162,7 @@ namespace osu.Game.Beatmaps
                     Icon = FontAwesome.fa_superpowers,
                     Text = "You gotta be an osu!supporter to download for now 'yo"
                 });
-                return;
+                return false;
             }
 
             var downloadNotification = new DownloadNotification
@@ -227,6 +228,7 @@ namespace osu.Game.Beatmaps
             // don't run in the main api queue as this is a long-running task.
             Task.Factory.StartNew(() => request.Perform(api), TaskCreationOptions.LongRunning);
             BeatmapDownloadBegan?.Invoke(request);
+            return true;
         }
 
         protected override void PresentCompletedImport(IEnumerable<BeatmapSetInfo> imported)
@@ -348,7 +350,7 @@ namespace osu.Game.Beatmaps
                 OnlineBeatmapSetID = beatmap.BeatmapInfo.BeatmapSet?.OnlineBeatmapSetID,
                 Beatmaps = new List<BeatmapInfo>(),
                 Hash = computeBeatmapSetHash(reader),
-                Metadata = beatmap.Metadata
+                Metadata = beatmap.Metadata,
             };
         }
 

osu.Game/Beatmaps/ControlPoints/ControlPointInfo.cs

@@ -55,14 +55,14 @@ namespace osu.Game.Beatmaps.ControlPoints
         /// </summary>
         /// <param name="time">The time to find the sound control point at.</param>
         /// <returns>The sound control point.</returns>
-        public SampleControlPoint SamplePointAt(double time) => binarySearch(SamplePoints, time, SamplePoints.FirstOrDefault());
+        public SampleControlPoint SamplePointAt(double time) => binarySearch(SamplePoints, time, SamplePoints.Count > 0 ? SamplePoints[0] : null);
 
         /// <summary>
         /// Finds the timing control point that is active at <paramref name="time"/>.
         /// </summary>
         /// <param name="time">The time to find the timing control point at.</param>
         /// <returns>The timing control point.</returns>
-        public TimingControlPoint TimingPointAt(double time) => binarySearch(TimingPoints, time, TimingPoints.FirstOrDefault());
+        public TimingControlPoint TimingPointAt(double time) => binarySearch(TimingPoints, time, TimingPoints.Count > 0 ? TimingPoints[0] : null);
 
         /// <summary>
         /// Finds the maximum BPM represented by any timing control point.
@@ -104,17 +104,26 @@ namespace osu.Game.Beatmaps.ControlPoints
             if (time < list[0].Time)
                 return prePoint ?? new T();
 
-            int index = list.BinarySearch(new T { Time = time });
+            if (time >= list[list.Count - 1].Time)
+                return list[list.Count - 1];
 
-            // Check if we've found an exact match (t == time)
+            int l = 0;
-            if (index >= 0)
+            int r = list.Count - 2;
-                return list[index];
 
-            index = ~index;
+            while (l <= r)
+            {
+                int pivot = l + ((r - l) >> 1);
 
-            // BinarySearch will return the index of the first element _greater_ than the search
+                if (list[pivot].Time < time)
-            // This is the inactive point - the active point is the one before it (index - 1)
+                    l = pivot + 1;
-            return list[index - 1];
+                else if (list[pivot].Time > time)
+                    r = pivot - 1;
+                else
+                    return list[pivot];
+            }
+
+            // l will be the first control point with Time > time, but we want the one before it
+            return list[l - 1];
         }
     }
 }

osu.Game/Beatmaps/Drawables/BeatmapSetDownloader.cs

@@ -71,9 +71,11 @@ namespace osu.Game.Beatmaps.Drawables
             if (DownloadState.Value > DownloadStatus.NotDownloaded)
                 return;
 
-            beatmaps.Download(set, noVideo);
+            if (beatmaps.Download(set, noVideo))
-
+            {
-            DownloadState.Value = DownloadStatus.Downloading;
+                // Only change state if download can happen
+                DownloadState.Value = DownloadStatus.Downloading;
+            }
         }
 
         private void setAdded(BeatmapSetInfo s)

osu.Game/Beatmaps/DummyWorkingBeatmap.cs

@@ -26,15 +26,7 @@ namespace osu.Game.Beatmaps
                     Title = "no beatmaps available!"
                 },
                 BeatmapSet = new BeatmapSetInfo(),
-                BaseDifficulty = new BeatmapDifficulty
+                BaseDifficulty = new BeatmapDifficulty(),
-                {
-                    DrainRate = 0,
-                    CircleSize = 0,
-                    OverallDifficulty = 0,
-                    ApproachRate = 0,
-                    SliderMultiplier = 0,
-                    SliderTickRate = 0,
-                },
                 Ruleset = new DummyRulesetInfo()
             })
         {

osu.Game/Beatmaps/Formats/LegacyBeatmapDecoder.cs

@@ -5,6 +5,7 @@ using System;
 using System.Globalization;
 using System.IO;
 using System.Linq;
+using osu.Framework.IO.File;
 using osu.Game.Beatmaps.Timing;
 using osu.Game.Rulesets.Objects.Legacy;
 using osu.Game.Beatmaps.ControlPoints;
@@ -58,7 +59,7 @@ namespace osu.Game.Beatmaps.Formats
                 hitObject.ApplyDefaults(this.beatmap.ControlPointInfo, this.beatmap.BeatmapInfo.BaseDifficulty);
         }
 
-        protected override bool ShouldSkipLine(string line) => base.ShouldSkipLine(line) || line.StartsWith(" ") || line.StartsWith("_");
+        protected override bool ShouldSkipLine(string line) => base.ShouldSkipLine(line) || line.StartsWith(" ", StringComparison.Ordinal) || line.StartsWith("_", StringComparison.Ordinal);
 
         protected override void ParseLine(Beatmap beatmap, Section section, string line)
         {
@@ -100,7 +101,7 @@ namespace osu.Game.Beatmaps.Formats
             switch (pair.Key)
             {
                 case @"AudioFilename":
-                    metadata.AudioFile = pair.Value;
+                    metadata.AudioFile = FileSafety.PathStandardise(pair.Value);
                     break;
                 case @"AudioLeadIn":
                     beatmap.BeatmapInfo.AudioLeadIn = int.Parse(pair.Value);
@@ -256,7 +257,7 @@ namespace osu.Game.Beatmaps.Formats
             {
                 case EventType.Background:
                     string filename = split[2].Trim('"');
-                    beatmap.BeatmapInfo.Metadata.BackgroundFile = filename;
+                    beatmap.BeatmapInfo.Metadata.BackgroundFile = FileSafety.PathStandardise(filename);
                     break;
                 case EventType.Break:
                     var breakEvent = new BreakPeriod

osu.Game/Beatmaps/Formats/LegacyDecoder.cs

@@ -69,7 +69,7 @@ namespace osu.Game.Beatmaps.Formats
 
         protected string StripComments(string line)
         {
-            var index = line.IndexOf("//", StringComparison.Ordinal);
+            var index = line.AsSpan().IndexOf("//".AsSpan());
             if (index > 0)
                 return line.Substring(0, index);
             return line;

osu.Game/Beatmaps/Formats/LegacyStoryboardDecoder.cs

@@ -298,6 +298,6 @@ namespace osu.Game.Beatmaps.Formats
             }
         }
 
-        private string cleanFilename(string path) => FileSafety.PathStandardise(FileSafety.PathSanitise(path.Trim('\"')));
+        private string cleanFilename(string path) => FileSafety.PathStandardise(path.Trim('"'));
     }
 }

osu.Game/Beatmaps/IBeatmap.cs

@@ -39,7 +39,7 @@ namespace osu.Game.Beatmaps
         /// <summary>
         /// The hitobjects contained by this beatmap.
         /// </summary>
-        IEnumerable<HitObject> HitObjects { get; }
+        IReadOnlyList<HitObject> HitObjects { get; }
 
         /// <summary>
         /// Returns statistics for the <see cref="HitObjects"/> contained in this beatmap.

osu.Game/Beatmaps/WorkingBeatmap.cs

@@ -41,8 +41,13 @@ namespace osu.Game.Beatmaps
             beatmap = new RecyclableLazy<IBeatmap>(() =>
             {
                 var b = GetBeatmap() ?? new Beatmap();
-                // use the database-backed info.
+
+                // The original beatmap version needs to be preserved as the database doesn't contain it
+                BeatmapInfo.BeatmapVersion = b.BeatmapInfo.BeatmapVersion;
+
+                // Use the database-backed info for more up-to-date values (beatmap id, ranked status, etc)
                 b.BeatmapInfo = BeatmapInfo;
+
                 return b;
             });
 

osu.Game/Database/ArchiveModelManager.cs

@@ -404,7 +404,7 @@ namespace osu.Game.Database
                 using (Stream s = reader.GetStream(file))
                     fileInfos.Add(new TFileModel
                     {
-                        Filename = FileSafety.PathSanitise(file),
+                        Filename = FileSafety.PathStandardise(file),
                         FileInfo = files.Add(s)
                     });
 

osu.Game/Graphics/UserInterface/OsuDropdown.cs

@@ -30,7 +30,7 @@ namespace osu.Game.Graphics.UserInterface
         [BackgroundDependencyLoader]
         private void load(OsuColour colours)
         {
-            if (accentColour == default(Color4))
+            if (accentColour == default)
                 accentColour = colours.PinkDarker;
             updateAccentColour();
         }

osu.Game/Graphics/UserInterface/OsuTabControl.cs

@@ -53,7 +53,7 @@ namespace osu.Game.Graphics.UserInterface
         [BackgroundDependencyLoader]
         private void load(OsuColour colours)
         {
-            if (accentColour == default(Color4))
+            if (accentColour == default)
                 AccentColour = colours.Blue;
         }
 
@@ -142,7 +142,7 @@ namespace osu.Game.Graphics.UserInterface
             [BackgroundDependencyLoader]
             private void load(OsuColour colours)
             {
-                if (accentColour == default(Color4))
+                if (accentColour == default)
                     AccentColour = colours.Blue;
             }
 

osu.Game/Graphics/UserInterface/RollingCounter.cs

@@ -134,7 +134,7 @@ namespace osu.Game.Graphics.UserInterface
         /// </summary>
         public virtual void ResetCount()
         {
-            SetCountWithoutRolling(default(T));
+            SetCountWithoutRolling(default);
         }
 
         /// <summary>

osu.Game/Migrations/20181007180454_StandardizePaths.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("20181007180454_StandardizePaths")]
+    partial class StandardizePaths
+    {
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder
+                .HasAnnotation("ProductVersion", "2.1.3-rtm-32065");
+
+            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/20181007180454_StandardizePaths.cs

@@ -0,0 +1,26 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+using System.IO;
+
+namespace osu.Game.Migrations
+{
+    public partial class StandardizePaths : Migration
+    {
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            string windowsStyle = @"\";
+            string standardized = "/";
+
+            // Escaping \ does not seem to be needed.
+            migrationBuilder.Sql($"UPDATE `BeatmapInfo` SET `Path` = REPLACE(`Path`, '{windowsStyle}', '{standardized}')");
+            migrationBuilder.Sql($"UPDATE `BeatmapMetadata` SET `AudioFile` = REPLACE(`AudioFile`, '{windowsStyle}', '{standardized}')");
+            migrationBuilder.Sql($"UPDATE `BeatmapMetadata` SET `BackgroundFile` = REPLACE(`BackgroundFile`, '{windowsStyle}', '{standardized}')");
+            migrationBuilder.Sql($"UPDATE `BeatmapSetFileInfo` SET `Filename` = REPLACE(`Filename`, '{windowsStyle}', '{standardized}')");
+            migrationBuilder.Sql($"UPDATE `SkinFileInfo` SET `Filename` = REPLACE(`Filename`, '{windowsStyle}', '{standardized}')");
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+        }
+    }
+}

osu.Game/Migrations/OsuDbContextModelSnapshot.cs

@@ -14,7 +14,7 @@ namespace osu.Game.Migrations
         {
 #pragma warning disable 612, 618
             modelBuilder
-                .HasAnnotation("ProductVersion", "2.1.2-rtm-30932");
+                .HasAnnotation("ProductVersion", "2.1.3-rtm-32065");
 
             modelBuilder.Entity("osu.Game.Beatmaps.BeatmapDifficulty", b =>
                 {

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

@@ -1,16 +1,14 @@
 // 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.ComponentModel;
-using osu.Game.Online.API.Requests.Responses;
 using osu.Game.Overlays;
 using osu.Game.Overlays.Direct;
 using osu.Game.Rulesets;
 
 namespace osu.Game.Online.API.Requests
 {
-    public class SearchBeatmapSetsRequest : APIRequest<IEnumerable<APIBeatmapSet>>
+    public class SearchBeatmapSetsRequest : APIRequest<SearchBeatmapSetsResponse>
     {
         private readonly string query;
         private readonly RulesetInfo ruleset;
@@ -35,6 +33,7 @@ namespace osu.Game.Online.API.Requests
     public enum BeatmapSearchCategory
     {
         Any = 7,
+
         [Description("Ranked & Approved")]
         RankedApproved = 0,
         Approved = 1,
@@ -43,6 +42,7 @@ namespace osu.Game.Online.API.Requests
         Qualified = 3,
         Pending = 4,
         Graveyard = 5,
+
         [Description("My Maps")]
         MyMaps = 6,
     }

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

@@ -0,0 +1,20 @@
+// 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 Newtonsoft.Json;
+using osu.Game.Online.API.Requests.Responses;
+
+namespace osu.Game.Online.API.Requests
+{
+    public class SearchBeatmapSetsResponse
+    {
+        public IEnumerable<APIBeatmapSet> BeatmapSets;
+
+        /// <summary>
+        /// A collection of parameters which should be passed to the search endpoint to fetch the next page.
+        /// </summary>
+        [JsonProperty("cursor")]
+        public dynamic CursorJson;
+    }
+}

osu.Game/Overlays/DirectOverlay.cs

@@ -288,7 +288,7 @@ namespace osu.Game.Overlays
             {
                 Task.Run(() =>
                 {
-                    var sets = response.Select(r => r.ToBeatmapSet(rulesets)).ToList();
+                    var sets = response.BeatmapSets.Select(r => r.ToBeatmapSet(rulesets)).ToList();
 
                     // may not need scheduling; loads async internally.
                     Schedule(() =>

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

@@ -74,7 +74,7 @@ namespace osu.Game.Overlays.Profile.Header
                     Anchor = Anchor.BottomCentre,
                     Origin = Anchor.BottomCentre,
                     RelativeSizeAxes = Axes.X,
-                    Height = 75,
+                    Height = 60,
                     Y = -secondary_textsize,
                     Alpha = 0,
                 }

osu.Game/Rulesets/Edit/EditRulesetContainer.cs

@@ -0,0 +1,106 @@
+// 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.Linq;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.UI;
+
+namespace osu.Game.Rulesets.Edit
+{
+    public abstract class EditRulesetContainer : CompositeDrawable
+    {
+        /// <summary>
+        /// The <see cref="Playfield"/> contained by this <see cref="EditRulesetContainer"/>.
+        /// </summary>
+        public abstract Playfield Playfield { get; }
+
+        internal EditRulesetContainer()
+        {
+            RelativeSizeAxes = Axes.Both;
+        }
+
+        /// <summary>
+        /// Adds a <see cref="HitObject"/> to the <see cref="Beatmap"/> and displays a visual representation of it.
+        /// </summary>
+        /// <param name="hitObject">The <see cref="HitObject"/> to add.</param>
+        /// <returns>The visual representation of <paramref name="hitObject"/>.</returns>
+        internal abstract DrawableHitObject Add(HitObject hitObject);
+
+        /// <summary>
+        /// Removes a <see cref="HitObject"/> from the <see cref="Beatmap"/> and the display.
+        /// </summary>
+        /// <param name="hitObject">The <see cref="HitObject"/> to remove.</param>
+        /// <returns>The visual representation of the removed <paramref name="hitObject"/>.</returns>
+        internal abstract DrawableHitObject Remove(HitObject hitObject);
+    }
+
+    public class EditRulesetContainer<TObject> : EditRulesetContainer
+        where TObject : HitObject
+    {
+        public override Playfield Playfield => rulesetContainer.Playfield;
+
+        private Ruleset ruleset => rulesetContainer.Ruleset;
+        private Beatmap<TObject> beatmap => rulesetContainer.Beatmap;
+
+        private readonly RulesetContainer<TObject> rulesetContainer;
+
+        public EditRulesetContainer(RulesetContainer<TObject> rulesetContainer)
+        {
+            this.rulesetContainer = rulesetContainer;
+
+            InternalChild = rulesetContainer;
+
+            Playfield.DisplayJudgements.Value = false;
+        }
+
+        internal override DrawableHitObject Add(HitObject hitObject)
+        {
+            var tObject = (TObject)hitObject;
+
+            // Add to beatmap, preserving sorting order
+            var insertionIndex = beatmap.HitObjects.FindLastIndex(h => h.StartTime <= hitObject.StartTime);
+            beatmap.HitObjects.Insert(insertionIndex + 1, tObject);
+
+            // Process object
+            var processor = ruleset.CreateBeatmapProcessor(beatmap);
+
+            processor.PreProcess();
+            tObject.ApplyDefaults(beatmap.ControlPointInfo, beatmap.BeatmapInfo.BaseDifficulty);
+            processor.PostProcess();
+
+            // Add visual representation
+            var drawableObject = rulesetContainer.GetVisualRepresentation(tObject);
+
+            rulesetContainer.Playfield.Add(drawableObject);
+            rulesetContainer.Playfield.PostProcess();
+
+            return drawableObject;
+        }
+
+        internal override DrawableHitObject Remove(HitObject hitObject)
+        {
+            var tObject = (TObject)hitObject;
+
+            // Remove from beatmap
+            beatmap.HitObjects.Remove(tObject);
+
+            // Process the beatmap
+            var processor = ruleset.CreateBeatmapProcessor(beatmap);
+
+            processor.PreProcess();
+            processor.PostProcess();
+
+            // Remove visual representation
+            var drawableObject = Playfield.AllHitObjects.Single(d => d.HitObject == hitObject);
+
+            rulesetContainer.Playfield.Remove(drawableObject);
+            rulesetContainer.Playfield.PostProcess();
+
+            return drawableObject;
+        }
+    }
+}