Merge pull request #3811 from peppy/fix-async-profile-logic

Fix loading scores on profile pages potentially causing long blocking operations

.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
@@ -247,7 +252,11 @@ paket-files/
 .fake/
 
 # JetBrains Rider
-.idea/
+.idea/.idea.osu/.idea/*.xml
+.idea/.idea.osu/.idea/codeStyles/*.xml
+.idea/.idea.osu/.idea/dataSources/*.xml
+.idea/.idea.osu/.idea/dictionaries/*.xml
+.idea/.idea.osu/*.iml
 *.sln.iml
 
 # CodeRush
@@ -257,3 +266,5 @@ paket-files/
 __pycache__/
 *.pyc
 Staging/
+
+inspectcodereport.xml

.vscode/launch.json

@@ -41,7 +41,7 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/osu.Desktop/bin/Debug/netcoreapp2.1/osu!.dll",
+                "${workspaceRoot}/osu.Desktop/bin/Debug/netcoreapp2.1/osu!.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build osu! (Debug)",
@@ -58,7 +58,7 @@
             "request": "launch",
             "program": "dotnet",
             "args": [
-                "${workspaceRoot}/osu.Desktop/bin/Release/netcoreapp2.1/osu!.dll",
+                "${workspaceRoot}/osu.Desktop/bin/Release/netcoreapp2.1/osu!.dll"
             ],
             "cwd": "${workspaceRoot}",
             "preLaunchTask": "Build osu! (Release)",
@@ -70,4 +70,4 @@
             "console": "internalConsole"
         }
     ]
-}
+}

README.md

@@ -1,18 +1,35 @@
 # osu! [![Build status](https://ci.appveyor.com/api/projects/status/u2p01nx7l6og8buh?svg=true)](https://ci.appveyor.com/project/peppy/osu)  [![CodeFactor](https://www.codefactor.io/repository/github/ppy/osu/badge)](https://www.codefactor.io/repository/github/ppy/osu) [![dev chat](https://discordapp.com/api/guilds/188630481301012481/widget.png?style=shield)](https://discord.gg/ppy)
 
-Rhythm is just a *click* away. The future of [osu!](https://osu.ppy.sh) and the beginning of an open era!
+Rhythm is just a *click* away. The future of [osu!](https://osu.ppy.sh) and the beginning of an open era! Commonly known by the codename "osu!lazer". Pew pew.
 
 # Status
 
-This is still heavily under development and is not intended for end-user use. This repository is intended for developer collaboration. You're welcome to try and use it but please do not submit bug reports without a patch. Please do not ask for help building or using this software.
+This project is still heavily under development, but is in a state where users are encouraged to try it out and keep it installed alongside the stable osu! client. It will continue to evolve over the coming months and hopefully bring some new unique features to the table.
+
+We are accepting bug reports (please report with as much detail as possible). Feature requests are welcome as long as you read and understand the contribution guidelines listed below.
 
 # Requirements
 
-- A desktop platform that can compile .NET 4.7.1. We recommend using [Visual Studio Community Edition](https://www.visualstudio.com/) (Windows), [Visual Studio for Mac](https://www.visualstudio.com/vs/visual-studio-mac/) (macOS) or [MonoDevelop](http://www.monodevelop.com/download/) (Linux), all of which are free. [Visual Studio Code](https://code.visualstudio.com/) may also be used but requires further setup steps which are not covered here.
+- A desktop platform with the [.NET Core SDK 2.1](https://www.microsoft.com/net/learn/get-started) or higher installed.
+- When working with the codebase, we recommend using an IDE with intellisense and syntax highlighting, such as [Visual Studio Community Edition](https://www.visualstudio.com/) (Windows), [Visual Studio Code](https://code.visualstudio.com/) (with the C# plugin installed) or [Jetbrains Rider](https://www.jetbrains.com/rider/) (commercial).
 
-# Getting Started
-- Clone the repository including submodules (`git clone --recurse-submodules https://github.com/ppy/osu`)
-- Build in your IDE of choice (recommended IDEs automatically restore nuget packages; if you are using an alternative make sure to `nuget restore`)
+# Building and running
+
+If you are not interested in developing the game, please head over to the [releases](https://github.com/ppy/osu/releases) to download a precompiled build with automatic updating enabled (download and run the install executable for your platform).
+
+Clone the repository including submodules
+
+`git clone --recurse-submodules https://github.com/ppy/osu`
+
+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
+
+If you run into issues building you may need to restore nuget packages (commonly via `dotnet restore`). Visual Studio Code users must run `Restore` task from debug tab before attempt to build.
 
 # Contributing
 

appveyor.yml

@@ -1,21 +1,8 @@
 clone_depth: 1
 version: '{branch}-{build}'
 image: Visual Studio 2017
-configuration: Debug
+test: off
 install:
   - cmd: git submodule update --init --recursive --depth=5
-  - cmd: choco install resharper-clt -y
-  - cmd: choco install nvika -y
-  - cmd: appveyor DownloadFile https://github.com/peppy/CodeFileSanity/releases/download/v0.2.5/CodeFileSanity.exe
-before_build:
-  - cmd: CodeFileSanity.exe
-  - cmd: nuget restore -verbosity quiet
-environment:
-  TargetFramework: net471
-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
+build_script:
+  - cmd: PowerShell -Version 2.0 .\build.ps1

appveyor_deploy.yml

@@ -1,32 +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/A6g5K/4d08705438.enc # signing certificate
-  - cmd: appveyor-tools\secure-file -decrypt 4d08705438.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\net471\osu.Desktop.Deploy.exe.config
-  - cd bin\Debug\net471\
-  - osu.Desktop.Deploy.exe %code_signing_password% %APPVEYOR_REPO_TAG_NAME%
-environment:
-  TargetFramework: net471
-  decode_secret:
-    secure: i67IC2xj6DjjxmA6Oj2jing3+MwzLkq6CbGsjfZ7rdY=
-  code_signing_password:
-    secure: 34tLNqvjmmZEi97MLKfrnQ==
-artifacts:
-  - path: '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.Desktop/OsuGameDesktop.cs

@@ -10,8 +10,10 @@ using osu.Desktop.Overlays;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Platform;
 using osu.Game;
-using OpenTK.Input;
+using osuTK.Input;
 using Microsoft.Win32;
+using osu.Desktop.Updater;
+using osu.Framework;
 using osu.Framework.Platform.Windows;
 
 namespace osu.Desktop
@@ -38,6 +40,51 @@ namespace osu.Desktop
             }
         }
 
+        protected override void LoadComplete()
+        {
+            base.LoadComplete();
+
+            if (!noVersionOverlay)
+            {
+                LoadComponentAsync(new VersionManager { Depth = int.MinValue }, v =>
+                {
+                    Add(v);
+                    v.State = Visibility.Visible;
+                });
+
+                if (RuntimeInfo.OS == RuntimeInfo.Platform.Windows)
+                    Add(new SquirrelUpdateManager());
+                else
+                    Add(new SimpleUpdateManager());
+            }
+        }
+
+        public override void SetHost(GameHost host)
+        {
+            base.SetHost(host);
+            var desktopWindow = host.Window as DesktopGameWindow;
+            if (desktopWindow != null)
+            {
+                desktopWindow.CursorState |= CursorState.Hidden;
+
+                desktopWindow.SetIconFromStream(Assembly.GetExecutingAssembly().GetManifestResourceStream(GetType(), "lazer.ico"));
+                desktopWindow.Title = Name;
+
+                desktopWindow.FileDrop += fileDrop;
+            }
+        }
+
+        private void fileDrop(object sender, FileDropEventArgs e)
+        {
+            var filePaths = new[] { e.FileName };
+
+            var firstExtension = Path.GetExtension(filePaths.First());
+
+            if (filePaths.Any(f => Path.GetExtension(f) != firstExtension)) return;
+
+            Task.Factory.StartNew(() => Import(filePaths), TaskCreationOptions.LongRunning);
+        }
+
         /// <summary>
         /// A method of accessing an osu-stable install in a controlled fashion.
         /// </summary>
@@ -77,45 +124,5 @@ namespace osu.Desktop
             {
             }
         }
-
-        protected override void LoadComplete()
-        {
-            base.LoadComplete();
-
-            if (!noVersionOverlay)
-            {
-                LoadComponentAsync(new VersionManager { Depth = int.MinValue }, v =>
-                {
-                    Add(v);
-                    v.State = Visibility.Visible;
-                });
-            }
-        }
-
-        public override void SetHost(GameHost host)
-        {
-            base.SetHost(host);
-            var desktopWindow = host.Window as DesktopGameWindow;
-            if (desktopWindow != null)
-            {
-                desktopWindow.CursorState |= CursorState.Hidden;
-
-                desktopWindow.SetIconFromStream(Assembly.GetExecutingAssembly().GetManifestResourceStream(GetType(), "lazer.ico"));
-                desktopWindow.Title = Name;
-
-                desktopWindow.FileDrop += fileDrop;
-            }
-        }
-
-        private void fileDrop(object sender, FileDropEventArgs e)
-        {
-            var filePaths = new[] { e.FileName };
-
-            var firstExtension = Path.GetExtension(filePaths.First());
-
-            if (filePaths.Any(f => Path.GetExtension(f) != firstExtension)) return;
-
-            Task.Factory.StartNew(() => Import(filePaths), TaskCreationOptions.LongRunning);
-        }
     }
 }

osu.Desktop/Overlays/VersionManager.cs

@@ -15,8 +15,8 @@ using osu.Game.Graphics.Sprites;
 using osu.Game.Overlays;
 using osu.Game.Overlays.Notifications;
 using osu.Game.Utils;
-using OpenTK;
-using OpenTK.Graphics;
+using osuTK;
+using osuTK.Graphics;
 
 namespace osu.Desktop.Overlays
 {
@@ -27,9 +27,6 @@ namespace osu.Desktop.Overlays
         private NotificationOverlay notificationOverlay;
         private GameHost host;
 
-        public override bool HandleKeyboardInput => false;
-        public override bool HandleMouseInput => false;
-
         [BackgroundDependencyLoader]
         private void load(NotificationOverlay notification, OsuColour colours, TextureStore textures, OsuGameBase game, OsuConfigManager config, GameHost host)
         {
@@ -91,10 +88,6 @@ namespace osu.Desktop.Overlays
                     }
                 }
             };
-
-#if NET_FRAMEWORK
-            Add(new SquirrelUpdateManager());
-#endif
         }
 
         protected override void LoadComplete()

osu.Desktop/Program.cs

@@ -4,12 +4,13 @@
 using System;
 using System.IO;
 using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
 using osu.Framework;
+using osu.Framework.Development;
+using osu.Framework.Logging;
 using osu.Framework.Platform;
 using osu.Game.IPC;
-#if NET_FRAMEWORK
-using System.Runtime;
-#endif
 
 namespace osu.Desktop
 {
@@ -18,16 +19,13 @@ namespace osu.Desktop
         [STAThread]
         public static int Main(string[] args)
         {
-            // required to initialise native SQLite libraries on some platforms.
-
-            if (!RuntimeInfo.IsMono)
-                useMulticoreJit();
-
             // Back up the cwd before DesktopGameHost changes it
             var cwd = Environment.CurrentDirectory;
 
             using (DesktopGameHost host = Host.GetSuitableHost(@"osu", true))
             {
+                host.ExceptionThrown += handleException;
+
                 if (!host.IsPrimaryInstance)
                 {
                     var importer = new ArchiveImportIPCChannel(host);
@@ -54,13 +52,23 @@ namespace osu.Desktop
             }
         }
 
-        private static void useMulticoreJit()
+        private static int allowableExceptions = DebugUtils.IsDebugBuild ? 0 : 1;
+
+        /// <summary>
+        /// Allow a maximum of one unhandled exception, per second of execution.
+        /// </summary>
+        /// <param name="arg"></param>
+        /// <returns></returns>
+        private static bool handleException(Exception arg)
         {
-#if NET_FRAMEWORK
-            var directory = Directory.CreateDirectory(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Profiles"));
-            ProfileOptimization.SetProfileRoot(directory.FullName);
-            ProfileOptimization.StartProfile("Startup.Profile");
-#endif
+            bool continueExecution = Interlocked.Decrement(ref allowableExceptions) >= 0;
+
+            Logger.Log($"Unhandled exception has been {(continueExecution ? $"allowed with {allowableExceptions} more allowable exceptions" : "denied")} .");
+
+            // restore the stock of allowable exceptions after a short delay.
+            Task.Delay(1000).ContinueWith(_ => Interlocked.Increment(ref allowableExceptions));
+
+            return continueExecution;
         }
     }
 }

osu.Desktop/Updater/SimpleUpdateManager.cs

@@ -0,0 +1,103 @@
+// 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 System.Threading.Tasks;
+using Newtonsoft.Json;
+using osu.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Graphics.Containers;
+using osu.Framework.IO.Network;
+using osu.Framework.Platform;
+using osu.Game;
+using osu.Game.Graphics;
+using osu.Game.Overlays;
+using osu.Game.Overlays.Notifications;
+
+namespace osu.Desktop.Updater
+{
+    /// <summary>
+    /// An update manager that shows notifications if a newer release is detected.
+    /// Installation is left up to the user.
+    /// </summary>
+    internal class SimpleUpdateManager : CompositeDrawable
+    {
+        private NotificationOverlay notificationOverlay;
+        private string version;
+        private GameHost host;
+
+        [BackgroundDependencyLoader]
+        private void load(NotificationOverlay notification, OsuGameBase game, GameHost host)
+        {
+            notificationOverlay = notification;
+
+            this.host = host;
+            version = game.Version;
+
+            if (game.IsDeployedBuild)
+                Schedule(() => Task.Run(() => checkForUpdateAsync()));
+        }
+
+        private async void checkForUpdateAsync()
+        {
+            var releases = new JsonWebRequest<GitHubRelease>("https://api.github.com/repos/ppy/osu/releases/latest");
+            await releases.PerformAsync();
+
+            var latest = releases.ResponseObject;
+
+            if (latest.TagName != version)
+            {
+                notificationOverlay.Post(new SimpleNotification
+                {
+                    Text = $"A newer release of osu! has been found ({version} → {latest.TagName}).\n\n"
+                           + "Click here to download the new version, which can be installed over the top of your existing installation",
+                    Icon = FontAwesome.fa_upload,
+                    Activated = () =>
+                    {
+                        host.OpenUrlExternally(getBestUrl(latest));
+                        return true;
+                    }
+                });
+            }
+        }
+
+        private string getBestUrl(GitHubRelease release)
+        {
+            GitHubAsset bestAsset = null;
+
+            switch (RuntimeInfo.OS)
+            {
+                case RuntimeInfo.Platform.Windows:
+                    bestAsset = release.Assets?.FirstOrDefault(f => f.Name.EndsWith(".exe"));
+                    break;
+                case RuntimeInfo.Platform.MacOsx:
+                    bestAsset = release.Assets?.FirstOrDefault(f => f.Name.EndsWith(".app.zip"));
+                    break;
+            }
+
+            return bestAsset?.BrowserDownloadUrl ?? release.HtmlUrl;
+        }
+
+        public class GitHubRelease
+        {
+            [JsonProperty("html_url")]
+            public string HtmlUrl { get; set; }
+
+            [JsonProperty("tag_name")]
+            public string TagName { get; set; }
+
+            [JsonProperty("assets")]
+            public List<GitHubAsset> Assets { get; set; }
+        }
+
+        public class GitHubAsset
+        {
+            [JsonProperty("name")]
+            public string Name { get; set; }
+
+            [JsonProperty("browser_download_url")]
+            public string BrowserDownloadUrl { get; set; }
+        }
+    }
+}

osu.Desktop/Updater/SquirrelUpdateManager.cs

@@ -1,8 +1,10 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-#if NET_FRAMEWORK
 using System;
+using System.IO;
+using System.Reflection;
+using System.Threading.Tasks;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Framework.Graphics.Colour;
@@ -12,11 +14,12 @@ using osu.Game;
 using osu.Game.Graphics;
 using osu.Game.Overlays;
 using osu.Game.Overlays.Notifications;
-using OpenTK;
-using OpenTK.Graphics;
+using osuTK;
+using osuTK.Graphics;
 using Squirrel;
+using LogLevel = Splat.LogLevel;
 
-namespace osu.Desktop.Overlays
+namespace osu.Desktop.Updater
 {
     public class SquirrelUpdateManager : Component
     {
@@ -35,7 +38,10 @@ namespace osu.Desktop.Overlays
             notificationOverlay = notification;
 
             if (game.IsDeployedBuild)
-                Schedule(() => checkForUpdateAsync());
+            {
+                Splat.Locator.CurrentMutable.Register(() => new SquirrelLogger(), typeof(Splat.ILogger));
+                Schedule(() => Task.Run(() => checkForUpdateAsync()));
+            }
         }
 
         private async void checkForUpdateAsync(bool useDeltaPatching = true, UpdateProgressNotification notification = null)
@@ -159,6 +165,31 @@ namespace osu.Desktop.Overlays
                 });
             }
         }
+
+        private class SquirrelLogger : Splat.ILogger, IDisposable
+        {
+            private readonly string path;
+            private readonly object locker = new object();
+            public LogLevel Level { get; set; } = LogLevel.Info;
+
+            public SquirrelLogger()
+            {
+                var file = Path.Combine(Path.GetDirectoryName(Assembly.GetEntryAssembly().Location), "SquirrelSetupUpdater.log");
+                if (File.Exists(file)) File.Delete(file);
+                path = file;
+            }
+
+            public void Write(string message, LogLevel logLevel)
+            {
+                if (logLevel < Level)
+                    return;
+
+                lock (locker) File.AppendAllText(path, message + "\r\n");
+            }
+
+            public void Dispose()
+            {
+            }
+        }
     }
 }
-#endif

osu.Desktop/osu.Desktop.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="..\osu.Game.props" />
   <PropertyGroup Label="Project">
-    <TargetFrameworks>net471;netcoreapp2.1</TargetFrameworks>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
     <OutputType>WinExe</OutputType>
     <PlatformTarget>AnyCPU</PlatformTarget>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
@@ -13,9 +13,6 @@
     <Version>0.0.0</Version>
     <FileVersion>0.0.0</FileVersion>
   </PropertyGroup>
-  <PropertyGroup Label="Defines">
-    <DefineConstants Condition="'$(TargetFramework)' == 'net471'">$(DefineConstants);NET_FRAMEWORK</DefineConstants>
-  </PropertyGroup>
   <PropertyGroup>
     <StartupObject>osu.Desktop.Program</StartupObject>
   </PropertyGroup>
@@ -29,11 +26,12 @@
     <PackageReference Include="Microsoft.Win32.Registry" Version="4.5.0" />
   </ItemGroup>
   <ItemGroup Label="Package References">
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.1" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.1.1" />
-    <PackageReference Include="squirrel.windows" Version="1.8.0" Condition="'$(TargetFramework)' == 'net471'" />
+    <PackageReference Include="System.IO.Packaging" Version="4.5.0" />
+    <PackageReference Include="ppy.squirrel.windows" Version="1.9.0.3" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.1.4" />
   </ItemGroup>
   <ItemGroup Label="Resources">
     <EmbeddedResource Include="lazer.ico" />
   </ItemGroup>
-</Project>
+</Project>

osu.Desktop/osu.nuspec

@@ -3,7 +3,7 @@
     <metadata>
         <id>osulazer</id>
         <version>0.0.0</version>
-        <title>osulazer</title>
+        <title>osu!lazer</title>
         <authors>ppy Pty Ltd</authors>
         <owners>Dean Herbert</owners>
         <projectUrl>https://osu.ppy.sh/</projectUrl>

osu.Game.Rulesets.Catch.Tests/.vscode/launch.json

@@ -2,35 +2,7 @@
     "version": "0.2.0",
     "configurations": [
         {
-            "name": "VisualTests (Debug, net471)",
-            "windows": {
-                "type": "clr"
-            },
-            "type": "mono",
-            "request": "launch",
-            "program": "${workspaceRoot}/bin/Debug/net471/osu.Game.Rulesets.Catch.Tests.exe",
-            "cwd": "${workspaceRoot}",
-            "preLaunchTask": "Build (Debug, msbuild)",
-            "runtimeExecutable": null,
-            "env": {},
-            "console": "internalConsole"
-        },
-        {
-            "name": "VisualTests (Release, net471)",
-            "windows": {
-                "type": "clr"
-            },
-            "type": "mono",
-            "request": "launch",
-            "program": "${workspaceRoot}/bin/Release/net471/osu.Game.Rulesets.Catch.Tests.exe",
-            "cwd": "${workspaceRoot}",
-            "preLaunchTask": "Build (Release, msbuild)",
-            "runtimeExecutable": null,
-            "env": {},
-            "console": "internalConsole"
-        },
-        {
-            "name": "VisualTests (Debug, netcoreapp2.1)",
+            "name": "VisualTests (Debug)",
             "type": "coreclr",
             "request": "launch",
             "program": "dotnet",
@@ -38,12 +10,12 @@
                 "${workspaceRoot}/bin/Debug/netcoreapp2.1/osu.Game.Rulesets.Catch.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
-            "preLaunchTask": "Build (Debug, dotnet)",
+            "preLaunchTask": "Build (Debug)",
             "env": {},
             "console": "internalConsole"
         },
         {
-            "name": "VisualTests (Release, netcoreapp2.1)",
+            "name": "VisualTests (Release)",
             "type": "coreclr",
             "request": "launch",
             "program": "dotnet",
@@ -51,7 +23,7 @@
                 "${workspaceRoot}/bin/Release/netcoreapp2.1/osu.Game.Rulesets.Catch.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
-            "preLaunchTask": "Build (Release, dotnet)",
+            "preLaunchTask": "Build (Release)",
             "env": {},
             "console": "internalConsole"
         }

osu.Game.Rulesets.Catch.Tests/.vscode/tasks.json

@@ -4,43 +4,13 @@
     "version": "2.0.0",
     "tasks": [
         {
-            "label": "Build (Debug, msbuild)",
-            "type": "shell",
-            "command": "msbuild",
-            "args": [
-                "osu.Game.Rulesets.Catch.Tests.csproj",
-                "/p:TargetFramework=net471",
-                "/p:GenerateFullPaths=true",
-                "/m",
-                "/verbosity:m"
-            ],
-            "group": "build",
-            "problemMatcher": "$msCompile"
-        },
-        {
-            "label": "Build (Release, msbuild)",
-            "type": "shell",
-            "command": "msbuild",
-            "args": [
-                "osu.Game.Rulesets.Catch.Tests.csproj",
-                "/p:Configuration=Release",
-                "/p:TargetFramework=net471",
-                "/p:GenerateFullPaths=true",
-                "/m",
-                "/verbosity:m"
-            ],
-            "group": "build",
-            "problemMatcher": "$msCompile"
-        },
-        {
-            "label": "Build (Debug, dotnet)",
+            "label": "Build (Debug)",
             "type": "shell",
             "command": "dotnet",
             "args": [
                 "build",
                 "--no-restore",
                 "osu.Game.Rulesets.Catch.Tests.csproj",
-                "/p:TargetFramework=netcoreapp2.1",
                 "/p:GenerateFullPaths=true",
                 "/m",
                 "/verbosity:m"
@@ -49,14 +19,13 @@
             "problemMatcher": "$msCompile"
         },
         {
-            "label": "Build (Release, dotnet)",
+            "label": "Build (Release)",
             "type": "shell",
             "command": "dotnet",
             "args": [
                 "build",
                 "--no-restore",
                 "osu.Game.Rulesets.Catch.Tests.csproj",
-                "/p:TargetFramework=netcoreapp2.1",
                 "/p:Configuration=Release",
                 "/p:GenerateFullPaths=true",
                 "/m",
@@ -66,16 +35,7 @@
             "problemMatcher": "$msCompile"
         },
         {
-            "label": "Restore (net471)",
-            "type": "shell",
-            "command": "nuget",
-            "args": [
-                "restore"
-            ],
-            "problemMatcher": []
-        },
-        {
-            "label": "Restore (netcoreapp2.1)",
+            "label": "Restore",
             "type": "shell",
             "command": "dotnet",
             "args": [

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

@@ -28,18 +28,20 @@ namespace osu.Game.Rulesets.Catch.Tests
 
         protected override IEnumerable<ConvertValue> CreateConvertValue(HitObject hitObject)
         {
-            if (hitObject is JuiceStream stream)
+            switch (hitObject)
             {
-                foreach (var nested in stream.NestedHitObjects)
-                    yield return new ConvertValue((CatchHitObject)nested);
+                case JuiceStream stream:
+                    foreach (var nested in stream.NestedHitObjects)
+                        yield return new ConvertValue((CatchHitObject)nested);
+                    break;
+                case BananaShower shower:
+                    foreach (var nested in shower.NestedHitObjects)
+                        yield return new ConvertValue((CatchHitObject)nested);
+                    break;
+                default:
+                    yield return new ConvertValue((CatchHitObject)hitObject);
+                    break;
             }
-            else if (hitObject is BananaShower shower)
-            {
-                foreach (var nested in shower.NestedHitObjects)
-                    yield return new ConvertValue((CatchHitObject)nested);
-            }
-            else
-                yield return new ConvertValue((CatchHitObject)hitObject);
         }
 
         protected override Ruleset CreateRuleset() => new CatchRuleset();

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

@@ -1,15 +1,15 @@
 // 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;
 using osu.Game.Rulesets.Catch.UI;
+using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Screens.Play;
 using osu.Game.Tests.Visual;
-using OpenTK;
+using osuTK;
 
 namespace osu.Game.Rulesets.Catch.Tests
 {
@@ -38,13 +38,11 @@ namespace osu.Game.Rulesets.Catch.Tests
                 beatmap.HitObjects.Add(new JuiceStream
                 {
                     X = 0.5f - width / 2,
-                    ControlPoints = new List<Vector2>
+                    Path = new SliderPath(PathType.Linear, new[]
                     {
                         Vector2.Zero,
                         new Vector2(width * CatchPlayfield.BASE_WIDTH, 0)
-                    },
-                    CurveType = CurveType.Linear,
-                    Distance = width * CatchPlayfield.BASE_WIDTH,
+                    }),
                     StartTime = i * 2000,
                     NewCombo = i % 8 == 0
                 });

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

@@ -55,7 +55,7 @@ namespace osu.Game.Rulesets.Catch.Tests
             {
             }
 
-            public void ToggleHyperDash(bool status) => MovableCatcher.SetHyperdashState(status ? 2 : 1);
+            public void ToggleHyperDash(bool status) => MovableCatcher.SetHyperDashState(status ? 2 : 1);
         }
     }
 }

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

@@ -10,7 +10,7 @@ using osu.Game.Rulesets.Catch.Objects;
 using osu.Game.Rulesets.Catch.Objects.Drawable;
 using osu.Game.Rulesets.Catch.Objects.Drawable.Pieces;
 using osu.Game.Tests.Visual;
-using OpenTK;
+using osuTK;
 
 namespace osu.Game.Rulesets.Catch.Tests
 {

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

@@ -8,9 +8,9 @@ using osu.Game.Rulesets.Catch.Objects;
 namespace osu.Game.Rulesets.Catch.Tests
 {
     [TestFixture]
-    public class TestCaseHyperdash : Game.Tests.Visual.TestCasePlayer
+    public class TestCaseHyperDash : Game.Tests.Visual.TestCasePlayer
     {
-        public TestCaseHyperdash()
+        public TestCaseHyperDash()
             : base(new CatchRuleset())
         {
         }

osu.Game.Rulesets.Catch.Tests/osu.Game.Rulesets.Catch.Tests.csproj

@@ -1,8 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="..\osu.TestProject.props" />
+  <ItemGroup Label="Package References">
+    <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+    <PackageReference Include="NUnit" Version="3.11.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="3.11.0" />
+    <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
+  </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>
-    <TargetFrameworks>netcoreapp2.1;net471</TargetFrameworks>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
   </PropertyGroup>
   <ItemGroup Label="Project References">
     <ProjectReference Include="..\osu.Game.Rulesets.Catch\osu.Game.Rulesets.Catch.csproj" />

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

@@ -34,13 +34,12 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
                 {
                     StartTime = obj.StartTime,
                     Samples = obj.Samples,
-                    ControlPoints = curveData.ControlPoints,
-                    CurveType = curveData.CurveType,
-                    Distance = curveData.Distance,
-                    RepeatSamples = curveData.RepeatSamples,
+                    Path = curveData.Path,
+                    NodeSamples = curveData.NodeSamples,
                     RepeatCount = curveData.RepeatCount,
                     X = (positionData?.X ?? 0) / CatchPlayfield.BASE_WIDTH,
                     NewCombo = comboData?.NewCombo ?? false,
+                    ComboOffset = comboData?.ComboOffset ?? 0,
                     LegacyLastTickOffset = legacyOffset?.LegacyLastTickOffset ?? 0
                 };
             }
@@ -51,7 +50,8 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
                     StartTime = obj.StartTime,
                     Samples = obj.Samples,
                     Duration = endTime.Duration,
-                    NewCombo = comboData?.NewCombo ?? false
+                    NewCombo = comboData?.NewCombo ?? false,
+                    ComboOffset = comboData?.ComboOffset ?? 0,
                 };
             }
             else
@@ -61,6 +61,7 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
                     StartTime = obj.StartTime,
                     Samples = obj.Samples,
                     NewCombo = comboData?.NewCombo ?? false,
+                    ComboOffset = comboData?.ComboOffset ?? 0,
                     X = (positionData?.X ?? 0) / CatchPlayfield.BASE_WIDTH
                 };
             }

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

@@ -8,7 +8,7 @@ using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Objects;
 using osu.Game.Rulesets.Catch.UI;
 using osu.Game.Rulesets.Objects.Types;
-using OpenTK;
+using osuTK;
 using osu.Game.Rulesets.Catch.MathUtils;
 
 namespace osu.Game.Rulesets.Catch.Beatmaps
@@ -74,42 +74,42 @@ namespace osu.Game.Rulesets.Catch.Beatmaps
 
         private void initialiseHyperDash(List<CatchHitObject> objects)
         {
-            // todo: add difficulty adjust.
-            double halfCatcherWidth = CatcherArea.CATCHER_SIZE * (objects.FirstOrDefault()?.Scale ?? 1) / CatchPlayfield.BASE_WIDTH / 2;
+            List<CatchHitObject> objectWithDroplets = new List<CatchHitObject>();
 
+            foreach (var currentObject in objects)
+            {
+                if (currentObject is Fruit)
+                    objectWithDroplets.Add(currentObject);
+                if (currentObject is JuiceStream)
+                    foreach (var currentJuiceElement in currentObject.NestedHitObjects)
+                        if (!(currentJuiceElement is TinyDroplet))
+                            objectWithDroplets.Add((CatchHitObject)currentJuiceElement);
+            }
+
+            objectWithDroplets.Sort((h1, h2) => h1.StartTime.CompareTo(h2.StartTime));
+
+            double halfCatcherWidth = CatcherArea.GetCatcherSize(Beatmap.BeatmapInfo.BaseDifficulty) / 2;
             int lastDirection = 0;
             double lastExcess = halfCatcherWidth;
 
-            int objCount = objects.Count;
-
-            for (int i = 0; i < objCount - 1; i++)
+            for (int i = 0; i < objectWithDroplets.Count - 1; i++)
             {
-                CatchHitObject currentObject = objects[i];
-
-                // not needed?
-                // if (currentObject is TinyDroplet) continue;
-
-                CatchHitObject nextObject = objects[i + 1];
-
-                // while (nextObject is TinyDroplet)
-                // {
-                //     if (++i == objCount - 1) break;
-                //     nextObject = objects[i + 1];
-                // }
+                CatchHitObject currentObject = objectWithDroplets[i];
+                CatchHitObject nextObject = objectWithDroplets[i + 1];
 
                 int thisDirection = nextObject.X > currentObject.X ? 1 : -1;
-                double timeToNext = nextObject.StartTime - ((currentObject as IHasEndTime)?.EndTime ?? currentObject.StartTime) - 4;
+                double timeToNext = nextObject.StartTime - currentObject.StartTime;
                 double distanceToNext = Math.Abs(nextObject.X - currentObject.X) - (lastDirection == thisDirection ? lastExcess : halfCatcherWidth);
-
-                if (timeToNext * CatcherArea.Catcher.BASE_SPEED < distanceToNext)
+                float distanceToHyper = (float)(timeToNext * CatcherArea.Catcher.BASE_SPEED - distanceToNext);
+                if (distanceToHyper < 0)
                 {
                     currentObject.HyperDashTarget = nextObject;
                     lastExcess = halfCatcherWidth;
                 }
                 else
                 {
-                    //currentObject.DistanceToHyperDash = timeToNext - distanceToNext;
-                    lastExcess = MathHelper.Clamp(timeToNext - distanceToNext, 0, halfCatcherWidth);
+                    currentObject.DistanceToHyperDash = distanceToHyper;
+                    lastExcess = MathHelper.Clamp(distanceToHyper, 0, halfCatcherWidth);
                 }
 
                 lastDirection = thisDirection;

osu.Game.Rulesets.Catch/CatchRuleset.cs

@@ -93,13 +93,11 @@ namespace osu.Game.Rulesets.Catch
                         new CatchModHidden(),
                         new CatchModFlashlight(),
                     };
-                case ModType.Special:
+                case ModType.Automation:
                     return new Mod[]
                     {
-                        new CatchModRelax(),
-                        null,
-                        null,
                         new MultiMod(new CatchModAutoplay(), new ModCinema()),
+                        new CatchModRelax(),
                     };
                 default:
                     return new Mod[] { };

osu.Game.Rulesets.Catch/Difficulty/CatchDifficultyCalculator.cs

@@ -46,13 +46,16 @@ namespace osu.Game.Rulesets.Catch.Difficulty
 
             foreach (var hitObject in beatmap.HitObjects)
             {
-                // We want to only consider fruits that contribute to the combo. Droplets are addressed as accuracy and spinners are not relevant for "skill" calculations.
-                if (hitObject is Fruit)
+                switch (hitObject)
                 {
-                    difficultyHitObjects.Add(new CatchDifficultyHitObject((CatchHitObject)hitObject, halfCatchWidth));
+                    // We want to only consider fruits that contribute to the combo. Droplets are addressed as accuracy and spinners are not relevant for "skill" calculations.
+                    case Fruit fruit:
+                        difficultyHitObjects.Add(new CatchDifficultyHitObject(fruit, halfCatchWidth));
+                        break;
+                    case JuiceStream _:
+                        difficultyHitObjects.AddRange(hitObject.NestedHitObjects.OfType<CatchHitObject>().Where(o => !(o is TinyDroplet)).Select(o => new CatchDifficultyHitObject(o, halfCatchWidth)));
+                        break;
                 }
-                if (hitObject is JuiceStream)
-                    difficultyHitObjects.AddRange(hitObject.NestedHitObjects.OfType<CatchHitObject>().Where(o => !(o is TinyDroplet)).Select(o => new CatchDifficultyHitObject(o, halfCatchWidth)));
             }
 
             difficultyHitObjects.Sort((a, b) => a.BaseHitObject.StartTime.CompareTo(b.BaseHitObject.StartTime));
@@ -61,12 +64,12 @@ namespace osu.Game.Rulesets.Catch.Difficulty
                 return new CatchDifficultyAttributes(mods, 0);
 
             // this is the same as osu!, so there's potential to share the implementation... maybe
-            double preEmpt = BeatmapDifficulty.DifficultyRange(beatmap.BeatmapInfo.BaseDifficulty.ApproachRate, 1800, 1200, 450) / timeRate;
+            double preempt = BeatmapDifficulty.DifficultyRange(beatmap.BeatmapInfo.BaseDifficulty.ApproachRate, 1800, 1200, 450) / timeRate;
             double starRating = Math.Sqrt(calculateDifficulty(difficultyHitObjects, timeRate)) * star_scaling_factor;
 
             return new CatchDifficultyAttributes(mods, starRating)
             {
-                ApproachRate = preEmpt > 1200.0 ? -(preEmpt - 1800.0) / 120.0 : -(preEmpt - 1200.0) / 150.0 + 5.0,
+                ApproachRate = preempt > 1200.0 ? -(preempt - 1800.0) / 120.0 : -(preempt - 1200.0) / 150.0 + 5.0,
                 MaxCombo = difficultyHitObjects.Count
             };
         }

osu.Game.Rulesets.Catch/Difficulty/CatchDifficultyHitObject.cs

@@ -4,7 +4,7 @@
 using System;
 using osu.Game.Rulesets.Catch.Objects;
 using osu.Game.Rulesets.Catch.UI;
-using OpenTK;
+using osuTK;
 
 namespace osu.Game.Rulesets.Catch.Difficulty
 {

osu.Game.Rulesets.Catch/Judgements/CatchBananaJudgement.cs

@@ -1,6 +1,7 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Scoring;
 
 namespace osu.Game.Rulesets.Catch.Judgements
@@ -9,8 +10,6 @@ namespace osu.Game.Rulesets.Catch.Judgements
     {
         public override bool AffectsCombo => false;
 
-        public override bool ShouldExplode => true;
-
         protected override int NumericResultFor(HitResult result)
         {
             switch (result)
@@ -32,5 +31,7 @@ namespace osu.Game.Rulesets.Catch.Judgements
                     return 8;
             }
         }
+
+        public override bool ShouldExplodeFor(JudgementResult result) => true;
     }
 }

osu.Game.Rulesets.Catch/Judgements/CatchJudgement.cs

@@ -23,21 +23,10 @@ namespace osu.Game.Rulesets.Catch.Judgements
         }
 
         /// <summary>
-        /// The base health increase for the result achieved.
+        /// Retrieves the numeric health increase of a <see cref="HitResult"/>.
         /// </summary>
-        public float HealthIncrease => HealthIncreaseFor(Result);
-
-        /// <summary>
-        /// Whether fruit on the platter should explode or drop.
-        /// Note that this is only checked if the owning object is also <see cref="IHasComboInformation.LastInCombo" />
-        /// </summary>
-        public virtual bool ShouldExplode => IsHit;
-
-        /// <summary>
-        /// Convert a <see cref="HitResult"/> to a base health increase.
-        /// </summary>
-        /// <param name="result">The value to convert.</param>
-        /// <returns>The base health increase.</returns>
+        /// <param name="result">The <see cref="HitResult"/> to find the numeric health increase for.</param>
+        /// <returns>The numeric health increase of <paramref name="result"/>.</returns>
         protected virtual float HealthIncreaseFor(HitResult result)
         {
             switch (result)
@@ -48,5 +37,18 @@ namespace osu.Game.Rulesets.Catch.Judgements
                     return 10.2f;
             }
         }
+
+        /// <summary>
+        /// Retrieves the numeric health increase of a <see cref="JudgementResult"/>.
+        /// </summary>
+        /// <param name="result">The <see cref="JudgementResult"/> to find the numeric health increase for.</param>
+        /// <returns>The numeric health increase of <paramref name="result"/>.</returns>
+        public float HealthIncreaseFor(JudgementResult result) => HealthIncreaseFor(result.Type);
+
+        /// <summary>
+        /// Whether fruit on the platter should explode or drop.
+        /// Note that this is only checked if the owning object is also <see cref="IHasComboInformation.LastInCombo" />
+        /// </summary>
+        public virtual bool ShouldExplodeFor(JudgementResult result) => result.IsHit;
     }
 }

osu.Game.Rulesets.Catch/Mods/CatchModAutoplay.cs

@@ -5,20 +5,17 @@ using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Objects;
 using osu.Game.Rulesets.Catch.Replays;
 using osu.Game.Rulesets.Mods;
-using osu.Game.Rulesets.Scoring;
+using osu.Game.Scoring;
 using osu.Game.Users;
 
 namespace osu.Game.Rulesets.Catch.Mods
 {
     public class CatchModAutoplay : ModAutoplay<CatchHitObject>
     {
-        protected override Score CreateReplayScore(Beatmap<CatchHitObject> beatmap)
+        protected override Score CreateReplayScore(Beatmap<CatchHitObject> beatmap) => new Score
         {
-            return new Score
-            {
-                User = new User { Username = "osu!salad!" },
-                Replay = new CatchAutoGenerator(beatmap).Generate(),
-            };
-        }
+            ScoreInfo = new ScoreInfo { User = new User { Username = "osu!salad!" } },
+            Replay = new CatchAutoGenerator(beatmap).Generate(),
+        };
     }
 }

osu.Game.Rulesets.Catch/Mods/CatchModFlashlight.cs

@@ -1,12 +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.Graphics;
+using osu.Game.Rulesets.Catch.Objects;
+using osu.Game.Rulesets.Catch.UI;
 using osu.Game.Rulesets.Mods;
+using osu.Game.Rulesets.UI;
+using osuTK;
 
 namespace osu.Game.Rulesets.Catch.Mods
 {
-    public class CatchModFlashlight : ModFlashlight
+    public class CatchModFlashlight : ModFlashlight<CatchHitObject>
     {
         public override double ScoreMultiplier => 1.12;
+
+        private const float default_flashlight_size = 350;
+
+        public override Flashlight CreateFlashlight() => new CatchFlashlight(playfield);
+
+        private CatchPlayfield playfield;
+
+        public override void ApplyToRulesetContainer(RulesetContainer<CatchHitObject> rulesetContainer)
+        {
+            playfield = (CatchPlayfield)rulesetContainer.Playfield;
+            base.ApplyToRulesetContainer(rulesetContainer);
+        }
+
+        private class CatchFlashlight : Flashlight
+        {
+            private readonly CatchPlayfield playfield;
+
+            public CatchFlashlight(CatchPlayfield playfield)
+            {
+                this.playfield = playfield;
+                FlashlightSize = new Vector2(0, getSizeFor(0));
+            }
+
+            protected override void Update()
+            {
+                base.Update();
+
+                var catcherArea = playfield.CatcherArea;
+
+                FlashlightPosition = catcherArea.ToSpaceOfOtherDrawable(catcherArea.MovableCatcher.DrawPosition, this);
+            }
+
+            private float getSizeFor(int combo)
+            {
+                if (combo > 200)
+                    return default_flashlight_size * 0.8f;
+                else if (combo > 100)
+                    return default_flashlight_size * 0.9f;
+                else
+                    return default_flashlight_size;
+            }
+
+            protected override void OnComboChange(int newCombo)
+            {
+                this.TransformTo(nameof(FlashlightSize), new Vector2(0, getSizeFor(newCombo)), FLASHLIGHT_FADE_DURATION);
+            }
+
+            protected override string FragmentShader => "CircularFlashlight";
+        }
     }
 }

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

@@ -1,10 +1,15 @@
 // 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.Catch.Judgements;
+using osu.Game.Rulesets.Judgements;
+
 namespace osu.Game.Rulesets.Catch.Objects
 {
     public class Banana : Fruit
     {
         public override FruitVisualRepresentation VisualRepresentation => FruitVisualRepresentation.Banana;
+
+        public override Judgement CreateJudgement() => new CatchBananaJudgement();
     }
 }

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

@@ -16,16 +16,20 @@ namespace osu.Game.Rulesets.Catch.Objects
 
         public int IndexInBeatmap { get; set; }
 
-        public virtual FruitVisualRepresentation VisualRepresentation => (FruitVisualRepresentation)(IndexInBeatmap % 4);
+        public virtual FruitVisualRepresentation VisualRepresentation => (FruitVisualRepresentation)(ComboIndex % 4);
 
         public virtual bool NewCombo { get; set; }
 
+        public int ComboOffset { get; set; }
+
         public int IndexInCurrentCombo { get; set; }
 
         public int ComboIndex { get; set; }
 
         /// <summary>
-        /// The distance for a fruit to to next hyper if it's not a hyper.
+        /// Difference between the distance to the next object
+        /// and the distance that would have triggered a hyper dash.
+        /// A value close to 0 indicates a difficult jump (for difficulty calculation).
         /// </summary>
         public float DistanceToHyperDash { get; set; }
 

osu.Game.Rulesets.Catch/Objects/Drawable/DrawableBanana.cs

@@ -1,8 +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 osu.Game.Rulesets.Catch.Judgements;
-
 namespace osu.Game.Rulesets.Catch.Objects.Drawable
 {
     public class DrawableBanana : DrawableFruit
@@ -11,7 +9,5 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawable
             : base(h)
         {
         }
-
-        protected override CatchJudgement CreateJudgement() => new CatchBananaJudgement();
     }
 }

osu.Game.Rulesets.Catch/Objects/Drawable/DrawableBananaShower.cs

@@ -26,8 +26,6 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawable
                 AddNested(getVisualRepresentation?.Invoke(b));
         }
 
-        protected override bool ProvidesJudgement => false;
-
         protected override void AddNested(DrawableHitObject h)
         {
             ((DrawableCatchHitObject)h).CheckPosition = o => CheckPosition?.Invoke(o) ?? false;

osu.Game.Rulesets.Catch/Objects/Drawable/DrawableCatchHitObject.cs

@@ -2,10 +2,9 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System;
-using OpenTK;
-using OpenTK.Graphics;
+using osuTK;
+using osuTK.Graphics;
 using osu.Framework.Graphics;
-using osu.Game.Rulesets.Catch.Judgements;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Scoring;
@@ -53,20 +52,14 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawable
 
         public Func<CatchHitObject, bool> CheckPosition;
 
-        protected override void CheckForJudgements(bool userTriggered, double timeOffset)
+        protected override void CheckForResult(bool userTriggered, double timeOffset)
         {
             if (CheckPosition == null) return;
 
-            if (timeOffset >= 0)
-            {
-                var judgement = CreateJudgement();
-                judgement.Result = CheckPosition.Invoke(HitObject) ? HitResult.Perfect : HitResult.Miss;
-                AddJudgement(judgement);
-            }
+            if (timeOffset >= 0 && Result != null)
+                ApplyResult(r => r.Type = CheckPosition.Invoke(HitObject) ? HitResult.Perfect : HitResult.Miss);
         }
 
-        protected virtual CatchJudgement CreateJudgement() => new CatchJudgement();
-
         protected override void SkinChanged(ISkinSource skin, bool allowFallback)
         {
             base.SkinChanged(skin, allowFallback);

osu.Game.Rulesets.Catch/Objects/Drawable/DrawableDroplet.cs

@@ -4,9 +4,8 @@
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
 using osu.Game.Rulesets.Catch.Objects.Drawable.Pieces;
-using OpenTK;
-using OpenTK.Graphics;
-using osu.Game.Rulesets.Catch.Judgements;
+using osuTK;
+using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Catch.Objects.Drawable
 {
@@ -24,8 +23,6 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawable
             Masking = false;
         }
 
-        protected override CatchJudgement CreateJudgement() => new CatchDropletJudgement();
-
         [BackgroundDependencyLoader]
         private void load()
         {

osu.Game.Rulesets.Catch/Objects/Drawable/DrawableFruit.cs

@@ -9,8 +9,8 @@ using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
 using osu.Framework.MathUtils;
 using osu.Game.Rulesets.Catch.Objects.Drawable.Pieces;
-using OpenTK;
-using OpenTK.Graphics;
+using osuTK;
+using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Catch.Objects.Drawable
 {
@@ -40,7 +40,7 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawable
         private void load()
         {
             // todo: this should come from the skin.
-            AccentColour = colourForRrepesentation(HitObject.VisualRepresentation);
+            AccentColour = colourForRepresentation(HitObject.VisualRepresentation);
 
             InternalChildren = new[]
             {
@@ -275,7 +275,7 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawable
             border.Alpha = (float)MathHelper.Clamp((HitObject.StartTime - Time.Current) / 500, 0, 1);
         }
 
-        private Color4 colourForRrepesentation(FruitVisualRepresentation representation)
+        private Color4 colourForRepresentation(FruitVisualRepresentation representation)
         {
             switch (representation)
             {

osu.Game.Rulesets.Catch/Objects/Drawable/DrawableJuiceStream.cs

@@ -26,8 +26,6 @@ namespace osu.Game.Rulesets.Catch.Objects.Drawable
                 AddNested(getVisualRepresentation?.Invoke(o));
         }
 
-        protected override bool ProvidesJudgement => false;
-
         protected override void AddNested(DrawableHitObject h)
         {
             var catchObject = (DrawableCatchHitObject)h;

osu.Game.Rulesets.Catch/Objects/Drawable/DrawableTinyDroplet.cs

@@ -1,19 +1,16 @@
 // Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
-using OpenTK;
-using osu.Game.Rulesets.Catch.Judgements;
+using osuTK;
 
 namespace osu.Game.Rulesets.Catch.Objects.Drawable
 {
     public class DrawableTinyDroplet : DrawableDroplet
     {
-        public DrawableTinyDroplet(Droplet h)
+        public DrawableTinyDroplet(TinyDroplet h)
             : base(h)
         {
             Size = new Vector2((float)CatchHitObject.OBJECT_RADIUS) / 8;
         }
-
-        protected override CatchJudgement CreateJudgement() => new CatchTinyDropletJudgement();
     }
 }

osu.Game.Rulesets.Catch/Objects/Drawable/Pieces/Pulp.cs

@@ -6,7 +6,7 @@ using osu.Framework.Graphics;
 using osu.Framework.Graphics.Containers;
 using osu.Framework.Graphics.Shapes;
 using osu.Game.Graphics;
-using OpenTK.Graphics;
+using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Catch.Objects.Drawable.Pieces
 {

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

@@ -1,9 +1,13 @@
 // 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.Catch.Judgements;
+using osu.Game.Rulesets.Judgements;
+
 namespace osu.Game.Rulesets.Catch.Objects
 {
     public class Droplet : CatchHitObject
     {
+        public override Judgement CreateJudgement() => new CatchDropletJudgement();
     }
 }

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

@@ -1,9 +1,13 @@
 // 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.Catch.Judgements;
+using osu.Game.Rulesets.Judgements;
+
 namespace osu.Game.Rulesets.Catch.Objects
 {
     public class Fruit : CatchHitObject
     {
+        public override Judgement CreateJudgement() => new CatchJudgement();
     }
 }

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

@@ -10,7 +10,6 @@ using osu.Game.Beatmaps.ControlPoints;
 using osu.Game.Rulesets.Catch.UI;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
-using OpenTK;
 
 namespace osu.Game.Rulesets.Catch.Objects
 {
@@ -50,7 +49,7 @@ 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 +94,7 @@ 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 +109,7 @@ 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,
@@ -127,38 +126,28 @@ 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;
 
         public double Duration => EndTime - StartTime;
 
-        public double Distance
+        private SliderPath path;
+
+        public SliderPath Path
         {
-            get { return Curve.Distance; }
-            set { Curve.Distance = value; }
+            get => path;
+            set => path = value;
         }
 
-        public SliderCurve Curve { get; } = new SliderCurve();
+        public double Distance => Path.Distance;
 
-        public List<Vector2> ControlPoints
-        {
-            get { return Curve.ControlPoints; }
-            set { Curve.ControlPoints = value; }
-        }
-
-        public List<List<SampleInfo>> RepeatSamples { get; set; } = new List<List<SampleInfo>>();
-
-        public CurveType CurveType
-        {
-            get { return Curve.CurveType; }
-            set { Curve.CurveType = value; }
-        }
+        public List<List<SampleInfo>> NodeSamples { get; set; } = new List<List<SampleInfo>>();
 
         public double? LegacyLastTickOffset { get; set; }
     }

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

@@ -1,9 +1,13 @@
 // 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.Catch.Judgements;
+using osu.Game.Rulesets.Judgements;
+
 namespace osu.Game.Rulesets.Catch.Objects
 {
     public class TinyDroplet : Droplet
     {
+        public override Judgement CreateJudgement() => new CatchTinyDropletJudgement();
     }
 }

osu.Game.Rulesets.Catch/Replays/CatchAutoGenerator.cs

@@ -5,10 +5,10 @@ using System;
 using System.Linq;
 using osu.Framework.MathUtils;
 using osu.Game.Beatmaps;
+using osu.Game.Replays;
 using osu.Game.Rulesets.Catch.Objects;
 using osu.Game.Rulesets.Catch.UI;
 using osu.Game.Rulesets.Replays;
-using osu.Game.Users;
 
 namespace osu.Game.Rulesets.Catch.Replays
 {
@@ -19,7 +19,7 @@ namespace osu.Game.Rulesets.Catch.Replays
         public CatchAutoGenerator(Beatmap<CatchHitObject> beatmap)
             : base(beatmap)
         {
-            Replay = new Replay { User = new User { Username = @"Autoplay" } };
+            Replay = new Replay();
         }
 
         protected Replay Replay;

osu.Game.Rulesets.Catch/Replays/CatchFramedReplayInputHandler.cs

@@ -2,8 +2,9 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System.Collections.Generic;
-using osu.Framework.Input;
+using osu.Framework.Input.StateChanges;
 using osu.Framework.MathUtils;
+using osu.Game.Replays;
 using osu.Game.Rulesets.Replays;
 
 namespace osu.Game.Rulesets.Catch.Replays

osu.Game.Rulesets.Catch/Replays/CatchReplayFrame.cs

@@ -2,9 +2,9 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using osu.Game.Beatmaps;
+using osu.Game.Replays.Legacy;
 using osu.Game.Rulesets.Catch.UI;
 using osu.Game.Rulesets.Replays;
-using osu.Game.Rulesets.Replays.Legacy;
 using osu.Game.Rulesets.Replays.Types;
 
 namespace osu.Game.Rulesets.Catch.Replays

osu.Game.Rulesets.Catch/Scoring/CatchScoreProcessor.cs

@@ -2,7 +2,6 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System;
-using System.Linq;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Catch.Judgements;
 using osu.Game.Rulesets.Catch.Objects;
@@ -21,55 +20,28 @@ namespace osu.Game.Rulesets.Catch.Scoring
 
         private float hpDrainRate;
 
-        protected override void SimulateAutoplay(Beatmap<CatchHitObject> beatmap)
+        protected override void ApplyBeatmap(Beatmap<CatchHitObject> beatmap)
         {
-            hpDrainRate = beatmap.BeatmapInfo.BaseDifficulty.DrainRate;
+            base.ApplyBeatmap(beatmap);
 
-            foreach (var obj in beatmap.HitObjects)
-            {
-                switch (obj)
-                {
-                    case JuiceStream stream:
-                        foreach (var nestedObject in stream.NestedHitObjects)
-                            switch (nestedObject)
-                            {
-                                case TinyDroplet _:
-                                    AddJudgement(new CatchTinyDropletJudgement { Result = HitResult.Perfect });
-                                    break;
-                                case Droplet _:
-                                    AddJudgement(new CatchDropletJudgement { Result = HitResult.Perfect });
-                                    break;
-                                case Fruit _:
-                                    AddJudgement(new CatchJudgement { Result = HitResult.Perfect });
-                                    break;
-                            }
-                        break;
-                    case BananaShower shower:
-                        foreach (var _ in shower.NestedHitObjects.Cast<CatchHitObject>())
-                            AddJudgement(new CatchBananaJudgement { Result = HitResult.Perfect });
-                        break;
-                    case Fruit _:
-                        AddJudgement(new CatchJudgement { Result = HitResult.Perfect });
-                        break;
-                }
-            }
+            hpDrainRate = beatmap.BeatmapInfo.BaseDifficulty.DrainRate;
         }
 
         private const double harshness = 0.01;
 
-        protected override void OnNewJudgement(Judgement judgement)
+        protected override void ApplyResult(JudgementResult result)
         {
-            base.OnNewJudgement(judgement);
+            base.ApplyResult(result);
 
-            if (judgement.Result == HitResult.Miss)
+            if (result.Type == HitResult.Miss)
             {
-                if (!judgement.IsBonus)
+                if (!result.Judgement.IsBonus)
                     Health.Value -= hpDrainRate * (harshness * 2);
                 return;
             }
 
-            if (judgement is CatchJudgement catchJudgement)
-                Health.Value += Math.Max(catchJudgement.HealthIncrease - hpDrainRate, 0) * harshness;
+            if (result.Judgement is CatchJudgement catchJudgement)
+                Health.Value += Math.Max(catchJudgement.HealthIncreaseFor(result) - hpDrainRate, 0) * harshness;
         }
     }
 }

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

@@ -10,6 +10,7 @@ using osu.Game.Rulesets.Catch.Objects.Drawable;
 using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.UI.Scrolling;
+using osuTK;
 
 namespace osu.Game.Rulesets.Catch.UI
 {
@@ -17,47 +18,43 @@ namespace osu.Game.Rulesets.Catch.UI
     {
         public const float BASE_WIDTH = 512;
 
-        protected override Container<Drawable> Content => content;
-        private readonly Container<Drawable> content;
-
-        private readonly CatcherArea catcherArea;
+        internal readonly CatcherArea CatcherArea;
 
         public CatchPlayfield(BeatmapDifficulty difficulty, Func<CatchHitObject, DrawableHitObject<CatchHitObject>> getVisualRepresentation)
-            : base(ScrollingDirection.Down, BASE_WIDTH)
         {
             Container explodingFruitContainer;
 
             Anchor = Anchor.TopCentre;
             Origin = Anchor.TopCentre;
 
-            base.Content.Anchor = Anchor.BottomLeft;
-            base.Content.Origin = Anchor.BottomLeft;
+            Size = new Vector2(0.86f); // matches stable's vertical offset for catcher plate
 
-            base.Content.AddRange(new Drawable[]
+            InternalChild = new PlayfieldAdjustmentContainer
             {
-                explodingFruitContainer = new Container
+                RelativeSizeAxes = Axes.Both,
+                Children = new Drawable[]
                 {
-                    RelativeSizeAxes = Axes.Both,
-                },
-                catcherArea = new CatcherArea(difficulty)
-                {
-                    GetVisualRepresentation = getVisualRepresentation,
-                    ExplodingFruitTarget = explodingFruitContainer,
-                    Anchor = Anchor.BottomLeft,
-                    Origin = Anchor.TopLeft,
-                },
-                content = new Container<Drawable>
-                {
-                    RelativeSizeAxes = Axes.Both,
-                },
-            });
+                    explodingFruitContainer = new Container
+                    {
+                        RelativeSizeAxes = Axes.Both,
+                    },
+                    CatcherArea = new CatcherArea(difficulty)
+                    {
+                        GetVisualRepresentation = getVisualRepresentation,
+                        ExplodingFruitTarget = explodingFruitContainer,
+                        Anchor = Anchor.BottomLeft,
+                        Origin = Anchor.TopLeft,
+                    },
+                    HitObjectContainer
+                }
+            };
         }
 
-        public bool CheckIfWeCanCatch(CatchHitObject obj) => catcherArea.AttemptCatch(obj);
+        public bool CheckIfWeCanCatch(CatchHitObject obj) => CatcherArea.AttemptCatch(obj);
 
         public override void Add(DrawableHitObject h)
         {
-            h.OnJudgement += onJudgement;
+            h.OnNewResult += onNewResult;
 
             base.Add(h);
 
@@ -65,6 +62,7 @@ namespace osu.Game.Rulesets.Catch.UI
             fruit.CheckPosition = CheckIfWeCanCatch;
         }
 
-        private void onJudgement(DrawableHitObject judgedObject, Judgement judgement) => catcherArea.OnJudgement((DrawableCatchHitObject)judgedObject, judgement);
+        private void onNewResult(DrawableHitObject judgedObject, JudgementResult result)
+            => CatcherArea.OnResult((DrawableCatchHitObject)judgedObject, result);
     }
 }

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

@@ -3,25 +3,31 @@
 
 using osu.Framework.Input;
 using osu.Game.Beatmaps;
+using osu.Game.Configuration;
 using osu.Game.Input.Handlers;
+using osu.Game.Replays;
 using osu.Game.Rulesets.Catch.Objects;
 using osu.Game.Rulesets.Catch.Objects.Drawable;
 using osu.Game.Rulesets.Catch.Replays;
 using osu.Game.Rulesets.Catch.Scoring;
 using osu.Game.Rulesets.Objects.Drawables;
-using osu.Game.Rulesets.Replays;
 using osu.Game.Rulesets.Scoring;
 using osu.Game.Rulesets.UI;
 using osu.Game.Rulesets.UI.Scrolling;
-using OpenTK;
 
 namespace osu.Game.Rulesets.Catch.UI
 {
     public class CatchRulesetContainer : ScrollingRulesetContainer<CatchPlayfield, CatchHitObject>
     {
+        protected override ScrollVisualisationMethod VisualisationMethod => ScrollVisualisationMethod.Constant;
+
+        protected override bool UserScrollSpeedAdjustment => false;
+
         public CatchRulesetContainer(Ruleset ruleset, WorkingBeatmap beatmap)
             : base(ruleset, beatmap)
         {
+            Direction.Value = ScrollingDirection.Down;
+            TimeRange.Value = BeatmapDifficulty.DifficultyRange(beatmap.BeatmapInfo.BaseDifficulty.ApproachRate, 1800, 1200, 450);
         }
 
         public override ScoreProcessor CreateScoreProcessor() => new CatchScoreProcessor(this);
@@ -32,9 +38,7 @@ namespace osu.Game.Rulesets.Catch.UI
 
         public override PassThroughInputManager CreateInputManager() => new CatchInputManager(Ruleset.RulesetInfo);
 
-        protected override Vector2 PlayfieldArea => new Vector2(0.86f); // matches stable's vertical offset for catcher plate
-
-        protected override DrawableHitObject<CatchHitObject> GetVisualRepresentation(CatchHitObject h)
+        public override DrawableHitObject<CatchHitObject> GetVisualRepresentation(CatchHitObject h)
         {
             switch (h)
             {

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

@@ -18,16 +18,16 @@ using osu.Game.Rulesets.Catch.Replays;
 using osu.Game.Rulesets.Judgements;
 using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.UI;
-using OpenTK;
-using OpenTK.Graphics;
+using osuTK;
+using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Catch.UI
 {
     public class CatcherArea : Container
     {
-        public const float CATCHER_SIZE = 84;
+        public const float CATCHER_SIZE = 100;
 
-        protected readonly Catcher MovableCatcher;
+        protected internal readonly Catcher MovableCatcher;
 
         public Func<CatchHitObject, DrawableHitObject<CatchHitObject>> GetVisualRepresentation;
 
@@ -48,10 +48,13 @@ namespace osu.Game.Rulesets.Catch.UI
 
         private DrawableCatchHitObject lastPlateableFruit;
 
-        public void OnJudgement(DrawableCatchHitObject fruit, Judgement judgement)
+        public void OnResult(DrawableCatchHitObject fruit, JudgementResult result)
         {
             void runAfterLoaded(Action action)
             {
+                if (lastPlateableFruit == null)
+                    return;
+
                 // this is required to make this run after the last caught fruit runs UpdateState at least once.
                 // TODO: find a better alternative
                 if (lastPlateableFruit.IsLoaded)
@@ -60,7 +63,7 @@ namespace osu.Game.Rulesets.Catch.UI
                     lastPlateableFruit.OnLoadComplete = _ => action();
             }
 
-            if (judgement.IsHit && fruit.CanBePlated)
+            if (result.IsHit && fruit.CanBePlated)
             {
                 var caughtFruit = (DrawableCatchHitObject)GetVisualRepresentation?.Invoke(fruit.HitObject);
 
@@ -83,7 +86,7 @@ namespace osu.Game.Rulesets.Catch.UI
 
             if (fruit.HitObject.LastInCombo)
             {
-                if (((CatchJudgement)judgement).ShouldExplode)
+                if (((CatchJudgement)result.Judgement).ShouldExplodeFor(result))
                     runAfterLoaded(() => MovableCatcher.Explode());
                 else
                     MovableCatcher.Drop();
@@ -104,6 +107,11 @@ namespace osu.Game.Rulesets.Catch.UI
 
         public bool AttemptCatch(CatchHitObject obj) => MovableCatcher.AttemptCatch(obj);
 
+        public static float GetCatcherSize(BeatmapDifficulty difficulty)
+        {
+            return CATCHER_SIZE / CatchPlayfield.BASE_WIDTH * (1.0f - 0.7f * (difficulty.CircleSize - 5) / 5);
+        }
+
         public class Catcher : Container, IKeyBindingHandler<CatchAction>
         {
             /// <summary>
@@ -255,11 +263,11 @@ namespace osu.Game.Rulesets.Catch.UI
                     double positionDifference = target.X * CatchPlayfield.BASE_WIDTH - catcherPosition;
                     double velocity = positionDifference / Math.Max(1.0, timeDifference - 1000.0 / 60.0);
 
-                    SetHyperdashState(Math.Abs(velocity), target.X);
+                    SetHyperDashState(Math.Abs(velocity), target.X);
                 }
                 else
                 {
-                    SetHyperdashState();
+                    SetHyperDashState();
                 }
 
                 return validCatch;
@@ -270,18 +278,18 @@ namespace osu.Game.Rulesets.Catch.UI
             private float hyperDashTargetPosition;
 
             /// <summary>
-            /// Whether we are hypderdashing or not.
+            /// Whether we are hyper-dashing or not.
             /// </summary>
             public bool HyperDashing => hyperDashModifier != 1;
 
             /// <summary>
-            /// Set hyperdash state.
+            /// Set hyper-dash state.
             /// </summary>
-            /// <param name="modifier">The speed multiplier. If this is less or equals to 1, this catcher will be non-hyperdashing state.</param>
-            /// <param name="targetPosition">When this catcher crosses this position, this catcher ends hyperdashing.</param>
-            public void SetHyperdashState(double modifier = 1, float targetPosition = -1)
+            /// <param name="modifier">The speed multiplier. If this is less or equals to 1, this catcher will be non-hyper-dashing state.</param>
+            /// <param name="targetPosition">When this catcher crosses this position, this catcher ends hyper-dashing.</param>
+            public void SetHyperDashState(double modifier = 1, float targetPosition = -1)
             {
-                const float hyperdash_transition_length = 180;
+                const float hyper_dash_transition_length = 180;
 
                 bool previouslyHyperDashing = HyperDashing;
                 if (modifier <= 1 || X == targetPosition)
@@ -291,8 +299,8 @@ namespace osu.Game.Rulesets.Catch.UI
 
                     if (previouslyHyperDashing)
                     {
-                        this.FadeColour(Color4.White, hyperdash_transition_length, Easing.OutQuint);
-                        this.FadeTo(1, hyperdash_transition_length, Easing.OutQuint);
+                        this.FadeColour(Color4.White, hyper_dash_transition_length, Easing.OutQuint);
+                        this.FadeTo(1, hyper_dash_transition_length, Easing.OutQuint);
                     }
                 }
                 else
@@ -303,8 +311,8 @@ namespace osu.Game.Rulesets.Catch.UI
 
                     if (!previouslyHyperDashing)
                     {
-                        this.FadeColour(Color4.OrangeRed, hyperdash_transition_length, Easing.OutQuint);
-                        this.FadeTo(0.2f, hyperdash_transition_length, Easing.OutQuint);
+                        this.FadeColour(Color4.OrangeRed, hyper_dash_transition_length, Easing.OutQuint);
+                        this.FadeTo(0.2f, hyper_dash_transition_length, Easing.OutQuint);
                         Trail = true;
                     }
                 }
@@ -370,7 +378,7 @@ namespace osu.Game.Rulesets.Catch.UI
                     hyperDashDirection < 0 && hyperDashTargetPosition > X)
                 {
                     X = hyperDashTargetPosition;
-                    SetHyperdashState();
+                    SetHyperDashState();
                 }
             }
 
@@ -404,9 +412,7 @@ namespace osu.Game.Rulesets.Catch.UI
             /// </summary>
             public void Explode()
             {
-                var fruit = caughtFruit.ToArray();
-
-                foreach (var f in fruit)
+                foreach (var f in caughtFruit.ToArray())
                     Explode(f);
             }
 
@@ -419,15 +425,15 @@ namespace osu.Game.Rulesets.Catch.UI
                     fruit.Anchor = Anchor.TopLeft;
                     fruit.Position = caughtFruit.ToSpaceOfOtherDrawable(fruit.DrawPosition, ExplodingFruitTarget);
 
-                    caughtFruit.Remove(fruit);
+                    if (!caughtFruit.Remove(fruit))
+                        // we may have already been removed by a previous operation (due to the weird OnLoadComplete scheduling).
+                        // this avoids a crash on potentially attempting to Add a fruit to ExplodingFruitTarget twice.
+                        return;
 
                     ExplodingFruitTarget.Add(fruit);
                 }
 
-                fruit.MoveToY(fruit.Y - 50, 250, Easing.OutSine)
-                 .Then()
-                 .MoveToY(fruit.Y + 50, 500, Easing.InSine);
-
+                fruit.MoveToY(fruit.Y - 50, 250, Easing.OutSine).Then().MoveToY(fruit.Y + 50, 500, Easing.InSine);
                 fruit.MoveToX(fruit.X + originalX * 6, 1000);
                 fruit.FadeOut(750);
 

osu.Game.Rulesets.Catch/UI/PlayfieldAdjustmentContainer.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.Graphics;
+using osu.Framework.Graphics.Containers;
+using osuTK;
+
+namespace osu.Game.Rulesets.Catch.UI
+{
+    public class PlayfieldAdjustmentContainer : Container
+    {
+        protected override Container<Drawable> Content => content;
+        private readonly Container content;
+
+        public PlayfieldAdjustmentContainer()
+        {
+            InternalChild = new Container
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                RelativeSizeAxes = Axes.Both,
+                FillMode = FillMode.Fit,
+                FillAspectRatio = 4f / 3,
+                Child = content = new ScalingContainer { RelativeSizeAxes = Axes.Both }
+            };
+        }
+
+        /// <summary>
+        /// A <see cref="Container"/> which scales its content relative to a target width.
+        /// </summary>
+        private class ScalingContainer : Container
+        {
+            protected override void Update()
+            {
+                base.Update();
+
+                Scale = new Vector2(Parent.ChildSize.X / CatchPlayfield.BASE_WIDTH);
+                Size = Vector2.Divide(Vector2.One, Scale);
+            }
+        }
+    }
+}

osu.Game.Rulesets.Mania.Tests/.vscode/launch.json

@@ -2,35 +2,7 @@
     "version": "0.2.0",
     "configurations": [
         {
-            "name": "VisualTests (Debug, net471)",
-            "windows": {
-                "type": "clr"
-            },
-            "type": "mono",
-            "request": "launch",
-            "program": "${workspaceRoot}/bin/Debug/net471/osu.Game.Rulesets.Mania.Tests.exe",
-            "cwd": "${workspaceRoot}",
-            "preLaunchTask": "Build (Debug, msbuild)",
-            "runtimeExecutable": null,
-            "env": {},
-            "console": "internalConsole"
-        },
-        {
-            "name": "VisualTests (Release, net471)",
-            "windows": {
-                "type": "clr"
-            },
-            "type": "mono",
-            "request": "launch",
-            "program": "${workspaceRoot}/bin/Release/net471/osu.Game.Rulesets.Mania.Tests.exe",
-            "cwd": "${workspaceRoot}",
-            "preLaunchTask": "Build (Release, msbuild)",
-            "runtimeExecutable": null,
-            "env": {},
-            "console": "internalConsole"
-        },
-        {
-            "name": "VisualTests (Debug, netcoreapp2.1)",
+            "name": "VisualTests (Debug)",
             "type": "coreclr",
             "request": "launch",
             "program": "dotnet",
@@ -38,12 +10,12 @@
                 "${workspaceRoot}/bin/Debug/netcoreapp2.1/osu.Game.Rulesets.Mania.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
-            "preLaunchTask": "Build (Debug, dotnet)",
+            "preLaunchTask": "Build (Debug)",
             "env": {},
             "console": "internalConsole"
         },
         {
-            "name": "VisualTests (Release, netcoreapp2.1)",
+            "name": "VisualTests (Release)",
             "type": "coreclr",
             "request": "launch",
             "program": "dotnet",
@@ -51,7 +23,7 @@
                 "${workspaceRoot}/bin/Release/netcoreapp2.1/osu.Game.Rulesets.Mania.Tests.dll"
             ],
             "cwd": "${workspaceRoot}",
-            "preLaunchTask": "Build (Release, dotnet)",
+            "preLaunchTask": "Build (Release)",
             "env": {},
             "console": "internalConsole"
         }

osu.Game.Rulesets.Mania.Tests/.vscode/tasks.json

@@ -4,43 +4,13 @@
     "version": "2.0.0",
     "tasks": [
         {
-            "label": "Build (Debug, msbuild)",
-            "type": "shell",
-            "command": "msbuild",
-            "args": [
-                "osu.Game.Rulesets.Mania.Tests.csproj",
-                "/p:TargetFramework=net471",
-                "/p:GenerateFullPaths=true",
-                "/m",
-                "/verbosity:m"
-            ],
-            "group": "build",
-            "problemMatcher": "$msCompile"
-        },
-        {
-            "label": "Build (Release, msbuild)",
-            "type": "shell",
-            "command": "msbuild",
-            "args": [
-                "osu.Game.Rulesets.Mania.Tests.csproj",
-                "/p:Configuration=Release",
-                "/p:TargetFramework=net471",
-                "/p:GenerateFullPaths=true",
-                "/m",
-                "/verbosity:m"
-            ],
-            "group": "build",
-            "problemMatcher": "$msCompile"
-        },
-        {
-            "label": "Build (Debug, dotnet)",
+            "label": "Build (Debug)",
             "type": "shell",
             "command": "dotnet",
             "args": [
                 "build",
                 "--no-restore",
                 "osu.Game.Rulesets.Mania.Tests.csproj",
-                "/p:TargetFramework=netcoreapp2.1",
                 "/p:GenerateFullPaths=true",
                 "/m",
                 "/verbosity:m"
@@ -49,14 +19,13 @@
             "problemMatcher": "$msCompile"
         },
         {
-            "label": "Build (Release, dotnet)",
+            "label": "Build (Release)",
             "type": "shell",
             "command": "dotnet",
             "args": [
                 "build",
                 "--no-restore",
                 "osu.Game.Rulesets.Mania.Tests.csproj",
-                "/p:TargetFramework=netcoreapp2.1",
                 "/p:Configuration=Release",
                 "/p:GenerateFullPaths=true",
                 "/m",
@@ -66,16 +35,7 @@
             "problemMatcher": "$msCompile"
         },
         {
-            "label": "Restore (net471)",
-            "type": "shell",
-            "command": "nuget",
-            "args": [
-                "restore"
-            ],
-            "problemMatcher": []
-        },
-        {
-            "label": "Restore (netcoreapp2.1)",
+            "label": "Restore",
             "type": "shell",
             "command": "dotnet",
             "args": [

osu.Game.Rulesets.Mania.Tests/ManiaBeatmapConversionTest.cs

@@ -5,6 +5,8 @@ using System;
 using System.Collections.Generic;
 using NUnit.Framework;
 using osu.Framework.MathUtils;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Mania.Beatmaps;
 using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
@@ -13,11 +15,10 @@ using osu.Game.Tests.Beatmaps;
 namespace osu.Game.Rulesets.Mania.Tests
 {
     [TestFixture]
-    public class ManiaBeatmapConversionTest : BeatmapConversionTest<ConvertValue>
+    public class ManiaBeatmapConversionTest : BeatmapConversionTest<ManiaConvertMapping, ConvertValue>
     {
         protected override string ResourceAssembly => "osu.Game.Rulesets.Mania";
 
-        [NonParallelizable]
         [TestCase("basic")]
         public new void Test(string name)
         {
@@ -34,9 +35,35 @@ namespace osu.Game.Rulesets.Mania.Tests
             };
         }
 
+        protected override ManiaConvertMapping CreateConvertMapping() => new ManiaConvertMapping(Converter);
+
         protected override Ruleset CreateRuleset() => new ManiaRuleset();
     }
 
+     public class ManiaConvertMapping : ConvertMapping<ConvertValue>, IEquatable<ManiaConvertMapping>
+     {
+         public uint RandomW;
+         public uint RandomX;
+         public uint RandomY;
+         public uint RandomZ;
+
+         public ManiaConvertMapping()
+         {
+         }
+
+         public ManiaConvertMapping(IBeatmapConverter converter)
+         {
+             var maniaConverter = (ManiaBeatmapConverter)converter;
+             RandomW = maniaConverter.Random.W;
+             RandomX = maniaConverter.Random.X;
+             RandomY = maniaConverter.Random.Y;
+             RandomZ = maniaConverter.Random.Z;
+         }
+
+         public bool Equals(ManiaConvertMapping other) => other != null && RandomW == other.RandomW && RandomX == other.RandomX && RandomY == other.RandomY && RandomZ == other.RandomZ;
+         public override bool Equals(ConvertMapping<ConvertValue> other) => base.Equals(other) && Equals(other as ManiaConvertMapping);
+     }
+
     public struct ConvertValue : IEquatable<ConvertValue>
     {
         /// <summary>

osu.Game.Rulesets.Mania.Tests/ManiaPlacementBlueprintTestCase.cs

@@ -0,0 +1,52 @@
+// 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.Timing;
+using osu.Game.Rulesets.Mania.Edit;
+using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.UI.Scrolling;
+using osu.Game.Tests.Visual;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Tests
+{
+    [Cached(Type = typeof(IManiaHitObjectComposer))]
+    public abstract class ManiaPlacementBlueprintTestCase : PlacementBlueprintTestCase, IManiaHitObjectComposer
+    {
+        private readonly Column column;
+
+        protected ManiaPlacementBlueprintTestCase()
+        {
+            Add(column = new Column(0)
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                AccentColour = Color4.OrangeRed,
+                Clock = new FramedClock(new StopwatchClock()), // No scroll
+            });
+        }
+
+        protected override IReadOnlyDependencyContainer CreateChildDependencies(IReadOnlyDependencyContainer parent)
+        {
+            var dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
+
+            dependencies.CacheAs(((ScrollingTestContainer)HitObjectContainer).ScrollingInfo);
+
+            return dependencies;
+        }
+
+        protected override Container CreateHitObjectContainer() => new ScrollingTestContainer(ScrollingDirection.Down) { RelativeSizeAxes = Axes.Both };
+
+        protected override void AddHitObject(DrawableHitObject hitObject) => column.Add((DrawableManiaHitObject)hitObject);
+
+        public Column ColumnAt(Vector2 screenSpacePosition) => column;
+
+        public int TotalColumns => 1;
+    }
+}

osu.Game.Rulesets.Mania.Tests/ManiaSelectionBlueprintTestCase.cs

@@ -0,0 +1,38 @@
+// 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.Timing;
+using osu.Game.Rulesets.Mania.Edit;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Tests.Visual;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Tests
+{
+    [Cached(Type = typeof(IManiaHitObjectComposer))]
+    public abstract class ManiaSelectionBlueprintTestCase : SelectionBlueprintTestCase, IManiaHitObjectComposer
+    {
+        [Cached(Type = typeof(IAdjustableClock))]
+        private readonly IAdjustableClock clock = new StopwatchClock();
+
+        private readonly Column column;
+
+        protected ManiaSelectionBlueprintTestCase()
+        {
+            Add(column = new Column(0)
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                AccentColour = Color4.OrangeRed,
+                Clock = new FramedClock(new StopwatchClock()), // No scroll
+            });
+        }
+
+        public Column ColumnAt(Vector2 screenSpacePosition) => column;
+
+        public int TotalColumns => 1;
+    }
+}

osu.Game.Rulesets.Mania.Tests/ScrollingTestContainer.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.Allocation;
-using osu.Framework.Configuration;
-using osu.Framework.Graphics.Containers;
-using osu.Game.Rulesets.Mania.UI;
-using osu.Game.Rulesets.UI.Scrolling;
-
-namespace osu.Game.Rulesets.Mania.Tests
-{
-    /// <summary>
-    /// A container which provides a <see cref="IScrollingInfo"/> to children.
-    /// </summary>
-    public class ScrollingTestContainer : Container
-    {
-        private readonly ScrollingDirection direction;
-
-        public ScrollingTestContainer(ScrollingDirection direction)
-        {
-            this.direction = direction;
-        }
-
-        protected override IReadOnlyDependencyContainer CreateLocalDependencies(IReadOnlyDependencyContainer parent)
-        {
-            var dependencies = new DependencyContainer(base.CreateLocalDependencies(parent));
-            dependencies.CacheAs<IScrollingInfo>(new ScrollingInfo { Direction = { Value = direction }});
-            return dependencies;
-        }
-
-        private class ScrollingInfo : IScrollingInfo
-        {
-            public readonly Bindable<ScrollingDirection> Direction = new Bindable<ScrollingDirection>();
-            IBindable<ScrollingDirection> IScrollingInfo.Direction => Direction;
-        }
-    }
-}

osu.Game.Rulesets.Mania.Tests/TestCaseColumn.cs

@@ -14,8 +14,9 @@ using osu.Game.Rulesets.Mania.Objects.Drawables;
 using osu.Game.Rulesets.Mania.UI;
 using osu.Game.Rulesets.Mania.UI.Components;
 using osu.Game.Rulesets.UI.Scrolling;
-using OpenTK;
-using OpenTK.Graphics;
+using osu.Game.Tests.Visual;
+using osuTK;
+using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Mania.Tests
 {
@@ -48,8 +49,8 @@ namespace osu.Game.Rulesets.Mania.Tests
                 Spacing = new Vector2(20, 0),
                 Children = new[]
                 {
-                    createColumn(ScrollingDirection.Up, ManiaAction.Key1),
-                    createColumn(ScrollingDirection.Down, ManiaAction.Key2)
+                    createColumn(ScrollingDirection.Up, ManiaAction.Key1, 0),
+                    createColumn(ScrollingDirection.Down, ManiaAction.Key2, 1)
                 }
             };
         }
@@ -84,16 +85,15 @@ namespace osu.Game.Rulesets.Mania.Tests
             }
         }
 
-        private Drawable createColumn(ScrollingDirection direction, ManiaAction action)
+        private Drawable createColumn(ScrollingDirection direction, ManiaAction action, int index)
         {
-            var column = new Column(direction)
+            var column = new Column(index)
             {
                 Anchor = Anchor.Centre,
                 Origin = Anchor.Centre,
                 Height = 0.85f,
                 AccentColour = Color4.OrangeRed,
                 Action = { Value = action },
-                VisibleTimeRange = { Value = 2000 }
             };
 
             columns.Add(column);
@@ -104,6 +104,7 @@ namespace osu.Game.Rulesets.Mania.Tests
                 Origin = Anchor.Centre,
                 AutoSizeAxes = Axes.X,
                 RelativeSizeAxes = Axes.Y,
+                TimeRange = 2000,
                 Child = column
             };
         }

osu.Game.Rulesets.Mania.Tests/TestCaseEditor.cs

@@ -0,0 +1,32 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using NUnit.Framework;
+using osu.Framework.Allocation;
+using osu.Framework.Configuration;
+using osu.Game.Rulesets.Mania.Configuration;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Mania.Tests
+{
+    [TestFixture]
+    public class TestCaseEditor : EditorTestCase
+    {
+        private readonly Bindable<ManiaScrollingDirection> direction = new Bindable<ManiaScrollingDirection>();
+
+        public TestCaseEditor()
+            : base(new ManiaRuleset())
+        {
+            AddStep("upwards scroll", () => direction.Value = ManiaScrollingDirection.Up);
+            AddStep("downwards scroll", () => direction.Value = ManiaScrollingDirection.Down);
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(RulesetConfigCache configCache)
+        {
+            var config = (ManiaConfigManager)configCache.GetConfigFor(Ruleset.Value.CreateInstance());
+            config.BindWith(ManiaSetting.ScrollDirection, direction);
+        }
+    }
+}

osu.Game.Rulesets.Mania.Tests/TestCaseHoldNotePlacementBlueprint.cs

@@ -0,0 +1,18 @@
+// 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.Mania.Edit.Blueprints;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Mania.Tests
+{
+    public class TestCaseHoldNotePlacementBlueprint : ManiaPlacementBlueprintTestCase
+    {
+        protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableHoldNote((HoldNote)hitObject);
+        protected override PlacementBlueprint CreateBlueprint() => new HoldNotePlacementBlueprint();
+    }
+}

osu.Game.Rulesets.Mania.Tests/TestCaseHoldNoteSelectionBlueprint.cs

@@ -0,0 +1,57 @@
+// 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.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Mania.Edit.Blueprints;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.UI.Scrolling;
+using osu.Game.Tests.Visual;
+
+namespace osu.Game.Rulesets.Mania.Tests
+{
+    public class TestCaseHoldNoteSelectionBlueprint : ManiaSelectionBlueprintTestCase
+    {
+        private readonly DrawableHoldNote drawableObject;
+
+        protected override Container<Drawable> Content => content ?? base.Content;
+        private readonly Container content;
+
+        public TestCaseHoldNoteSelectionBlueprint()
+        {
+            var holdNote = new HoldNote { Column = 0, Duration = 1000 };
+            holdNote.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());
+
+            base.Content.Child = content = new ScrollingTestContainer(ScrollingDirection.Down)
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                AutoSizeAxes = Axes.Y,
+                Width = 50,
+                Child = drawableObject = new DrawableHoldNote(holdNote)
+                {
+                    Height = 300,
+                    AccentColour = OsuColour.Gray(0.3f)
+                }
+            };
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            foreach (var nested in drawableObject.NestedHitObjects)
+            {
+                double finalPosition = (nested.HitObject.StartTime - drawableObject.HitObject.StartTime) / drawableObject.HitObject.Duration;
+                nested.Y = (float)(-finalPosition * content.DrawHeight);
+            }
+        }
+
+        protected override SelectionBlueprint CreateBlueprint() => new HoldNoteSelectionBlueprint(drawableObject);
+    }
+}

osu.Game.Rulesets.Mania.Tests/TestCaseNotePlacementBlueprint.cs

@@ -0,0 +1,18 @@
+// 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.Mania.Edit.Blueprints;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.Objects;
+using osu.Game.Rulesets.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Mania.Tests
+{
+    public class TestCaseNotePlacementBlueprint : ManiaPlacementBlueprintTestCase
+    {
+        protected override DrawableHitObject CreateHitObject(HitObject hitObject) => new DrawableNote((Note)hitObject);
+        protected override PlacementBlueprint CreateBlueprint() => new NotePlacementBlueprint();
+    }
+}

osu.Game.Rulesets.Mania.Tests/TestCaseNoteSelectionBlueprint.cs

@@ -0,0 +1,41 @@
+// 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.Beatmaps;
+using osu.Game.Beatmaps.ControlPoints;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Mania.Edit.Blueprints;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.UI.Scrolling;
+using osu.Game.Tests.Visual;
+using osuTK;
+
+namespace osu.Game.Rulesets.Mania.Tests
+{
+    public class TestCaseNoteSelectionBlueprint : ManiaSelectionBlueprintTestCase
+    {
+        private readonly DrawableNote drawableObject;
+
+        protected override Container<Drawable> Content => content ?? base.Content;
+        private readonly Container content;
+
+        public TestCaseNoteSelectionBlueprint()
+        {
+            var note = new Note { Column = 0 };
+            note.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());
+
+            base.Content.Child = content = new ScrollingTestContainer(ScrollingDirection.Down)
+            {
+                Anchor = Anchor.Centre,
+                Origin = Anchor.Centre,
+                Size = new Vector2(50, 20),
+                Child = drawableObject = new DrawableNote(note)
+            };
+        }
+
+        protected override SelectionBlueprint CreateBlueprint() => new NoteSelectionBlueprint(drawableObject);
+    }
+}

osu.Game.Rulesets.Mania.Tests/TestCaseNotes.cs

@@ -20,8 +20,8 @@ using osu.Game.Rulesets.Objects.Drawables;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.UI.Scrolling;
 using osu.Game.Tests.Visual;
-using OpenTK;
-using OpenTK.Graphics;
+using osuTK;
+using osuTK.Graphics;
 
 namespace osu.Game.Rulesets.Mania.Tests
 {
@@ -46,15 +46,20 @@ namespace osu.Game.Rulesets.Mania.Tests
                 Spacing = new Vector2(20),
                 Children = new[]
                 {
-                    createNoteDisplay(ScrollingDirection.Down),
-                    createNoteDisplay(ScrollingDirection.Up),
-                    createHoldNoteDisplay(ScrollingDirection.Down),
-                    createHoldNoteDisplay(ScrollingDirection.Up),
+                    createNoteDisplay(ScrollingDirection.Down, 1, out var note1),
+                    createNoteDisplay(ScrollingDirection.Up, 2, out var note2),
+                    createHoldNoteDisplay(ScrollingDirection.Down, 1, out var holdNote1),
+                    createHoldNoteDisplay(ScrollingDirection.Up, 2, out var holdNote2),
                 }
             };
+
+            AddAssert("note 1 facing downwards", () => verifyAnchors(note1, Anchor.y2));
+            AddAssert("note 2 facing upwards", () => verifyAnchors(note2, Anchor.y0));
+            AddAssert("hold note 1 facing downwards", () => verifyAnchors(holdNote1, Anchor.y2));
+            AddAssert("hold note 2 facing upwards", () => verifyAnchors(holdNote2, Anchor.y0));
         }
 
-        private Drawable createNoteDisplay(ScrollingDirection direction)
+        private Drawable createNoteDisplay(ScrollingDirection direction, int identifier, out DrawableNote hitObject)
         {
             var note = new Note { StartTime = 999999999 };
             note.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());
@@ -62,24 +67,24 @@ namespace osu.Game.Rulesets.Mania.Tests
             return new ScrollingTestContainer(direction)
             {
                 AutoSizeAxes = Axes.Both,
-                Child = new NoteContainer(direction, $"note, scrolling {direction.ToString().ToLower()}")
+                Child = new NoteContainer(direction, $"note {identifier}, scrolling {direction.ToString().ToLowerInvariant()}")
                 {
-                    Child = new DrawableNote(note) { AccentColour = Color4.OrangeRed }
+                    Child = hitObject = new DrawableNote(note) { AccentColour = Color4.OrangeRed }
                 }
             };
         }
 
-        private Drawable createHoldNoteDisplay(ScrollingDirection direction)
+        private Drawable createHoldNoteDisplay(ScrollingDirection direction, int identifier, out DrawableHoldNote hitObject)
         {
-            var note = new HoldNote { StartTime = 999999999, Duration = 1000 };
+            var note = new HoldNote { StartTime = 999999999, Duration = 5000 };
             note.ApplyDefaults(new ControlPointInfo(), new BeatmapDifficulty());
 
             return new ScrollingTestContainer(direction)
             {
                 AutoSizeAxes = Axes.Both,
-                Child = new NoteContainer(direction, $"hold note, scrolling {direction.ToString().ToLower()}")
+                Child = new NoteContainer(direction, $"hold note {identifier}, scrolling {direction.ToString().ToLowerInvariant()}")
                 {
-                    Child = new DrawableHoldNote(note)
+                    Child = hitObject = new DrawableHoldNote(note)
                     {
                         RelativeSizeAxes = Axes.Both,
                         AccentColour = Color4.OrangeRed,
@@ -88,6 +93,12 @@ namespace osu.Game.Rulesets.Mania.Tests
             };
         }
 
+        private bool verifyAnchors(DrawableHitObject hitObject, Anchor expectedAnchor)
+            => hitObject.Anchor.HasFlag(expectedAnchor) && hitObject.Origin.HasFlag(expectedAnchor);
+
+        private bool verifyAnchors(DrawableHoldNote holdNote, Anchor expectedAnchor)
+            => verifyAnchors((DrawableHitObject)holdNote, expectedAnchor) && holdNote.NestedHitObjects.All(n => verifyAnchors(n, expectedAnchor));
+
         private class NoteContainer : Container
         {
             private readonly Container content;
@@ -137,9 +148,9 @@ namespace osu.Game.Rulesets.Mania.Tests
                 };
             }
 
-            protected override IReadOnlyDependencyContainer CreateLocalDependencies(IReadOnlyDependencyContainer parent)
+            protected override IReadOnlyDependencyContainer CreateChildDependencies(IReadOnlyDependencyContainer parent)
             {
-                var dependencies = new DependencyContainer(base.CreateLocalDependencies(parent));
+                var dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
                 dependencies.CacheAs<IBindable<ManiaAction>>(new Bindable<ManiaAction>());
                 return dependencies;
             }

osu.Game.Rulesets.Mania.Tests/TestCaseStage.cs

@@ -2,6 +2,7 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System.Collections.Generic;
+using System.Linq;
 using NUnit.Framework;
 using osu.Framework.Allocation;
 using osu.Framework.Graphics;
@@ -13,7 +14,8 @@ using osu.Game.Rulesets.Mania.Objects;
 using osu.Game.Rulesets.Mania.Objects.Drawables;
 using osu.Game.Rulesets.Mania.UI;
 using osu.Game.Rulesets.UI.Scrolling;
-using OpenTK;
+using osu.Game.Tests.Visual;
+using osuTK;
 
 namespace osu.Game.Rulesets.Mania.Tests
 {
@@ -24,6 +26,8 @@ namespace osu.Game.Rulesets.Mania.Tests
 
         private readonly List<ManiaStage> stages = new List<ManiaStage>();
 
+        private FillFlowContainer<ScrollingTestContainer> fill;
+
         public TestCaseStage()
             : base(columns)
         {
@@ -32,7 +36,7 @@ namespace osu.Game.Rulesets.Mania.Tests
         [BackgroundDependencyLoader]
         private void load()
         {
-            Child = new FillFlowContainer
+            Child = fill = new FillFlowContainer<ScrollingTestContainer>
             {
                 RelativeSizeAxes = Axes.Both,
                 Anchor = Anchor.Centre,
@@ -54,8 +58,22 @@ namespace osu.Game.Rulesets.Mania.Tests
             AddStep("hold note", createHoldNote);
             AddStep("minor bar line", () => createBarLine(false));
             AddStep("major bar line", () => createBarLine(true));
+
+            AddAssert("check note anchors", () => notesInStageAreAnchored(stages[0], Anchor.TopCentre));
+            AddAssert("check note anchors", () => notesInStageAreAnchored(stages[1], Anchor.BottomCentre));
+
+            AddStep("flip direction", () =>
+            {
+                foreach (var c in fill.Children)
+                    c.Flip();
+            });
+
+            AddAssert("check note anchors", () => notesInStageAreAnchored(stages[0], Anchor.BottomCentre));
+            AddAssert("check note anchors", () => notesInStageAreAnchored(stages[1], Anchor.TopCentre));
         }
 
+        private bool notesInStageAreAnchored(ManiaStage stage, Anchor anchor) => stage.Columns.SelectMany(c => c.AllHitObjects).All(o => o.Anchor == anchor);
+
         private void createNote()
         {
             foreach (var stage in stages)
@@ -101,11 +119,11 @@ namespace osu.Game.Rulesets.Mania.Tests
             }
         }
 
-        private Drawable createStage(ScrollingDirection direction, ManiaAction action)
+        private ScrollingTestContainer createStage(ScrollingDirection direction, ManiaAction action)
         {
             var specialAction = ManiaAction.Special1;
 
-            var stage = new ManiaStage(direction, 0, new StageDefinition { Columns = 2 }, ref action, ref specialAction) { VisibleTimeRange = { Value = 2000 } };
+            var stage = new ManiaStage(0, new StageDefinition { Columns = 2 }, ref action, ref specialAction);
             stages.Add(stage);
 
             return new ScrollingTestContainer(direction)
@@ -114,6 +132,7 @@ namespace osu.Game.Rulesets.Mania.Tests
                 Origin = Anchor.Centre,
                 RelativeSizeAxes = Axes.Y,
                 AutoSizeAxes = Axes.X,
+                TimeRange = 2000,
                 Child = stage
             };
         }

osu.Game.Rulesets.Mania.Tests/osu.Game.Rulesets.Mania.Tests.csproj

@@ -1,8 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <Import Project="..\osu.TestProject.props" />
+  <ItemGroup Label="Package References">
+    <PackageReference Include="Appveyor.TestLogger" Version="2.0.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+    <PackageReference Include="NUnit" Version="3.11.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="3.11.0" />
+    <PackageReference Update="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
+  </ItemGroup>
   <PropertyGroup Label="Project">
     <OutputType>WinExe</OutputType>
-    <TargetFrameworks>netcoreapp2.1;net471</TargetFrameworks>
+    <TargetFramework>netcoreapp2.1</TargetFramework>
   </PropertyGroup>
   <ItemGroup Label="Project References">
     <ProjectReference Include="..\osu.Game.Rulesets.Mania\osu.Game.Rulesets.Mania.csproj" />

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

@@ -5,13 +5,14 @@ using osu.Game.Rulesets.Mania.Objects;
 using System;
 using System.Linq;
 using System.Collections.Generic;
+using osu.Framework.MathUtils;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Objects;
 using osu.Game.Rulesets.Objects.Types;
 using osu.Game.Rulesets.Mania.Beatmaps.Patterns;
 using osu.Game.Rulesets.Mania.MathUtils;
 using osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy;
-using OpenTK;
+using osuTK;
 using osu.Game.Audio;
 
 namespace osu.Game.Rulesets.Mania.Beatmaps
@@ -28,8 +29,10 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
         public int TargetColumns;
         public readonly bool IsForCurrentRuleset;
 
+        // Internal for testing purposes
+        internal FastRandom Random { get; private set; }
+
         private Pattern lastPattern = new Pattern();
-        private FastRandom random;
 
         private ManiaBeatmap beatmap;
 
@@ -45,7 +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)
@@ -62,7 +65,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
             BeatmapDifficulty difficulty = original.BeatmapInfo.BaseDifficulty;
 
             int seed = (int)Math.Round(difficulty.DrainRate + difficulty.CircleSize) * 20 + (int)(difficulty.OverallDifficulty * 41.2) + (int)Math.Round(difficulty.ApproachRate);
-            random = new FastRandom(seed);
+            Random = new FastRandom(seed);
 
             return base.ConvertBeatmap(original);
         }
@@ -100,7 +103,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
 
         private double lastTime;
         private Vector2 lastPosition;
-        private PatternType lastStair;
+        private PatternType lastStair = PatternType.Stair;
         private void recordNote(double time, Vector2 position)
         {
             lastTime = time;
@@ -115,12 +118,15 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
         /// <returns>The hit objects generated.</returns>
         private IEnumerable<ManiaHitObject> generateSpecific(HitObject original, IBeatmap originalBeatmap)
         {
-            var generator = new SpecificBeatmapPatternGenerator(random, original, beatmap, lastPattern, originalBeatmap);
+            var generator = new SpecificBeatmapPatternGenerator(Random, original, beatmap, lastPattern, originalBeatmap);
 
-            Pattern newPattern = generator.Generate();
-            lastPattern = newPattern;
+            foreach (var newPattern in generator.Generate())
+            {
+                lastPattern = newPattern;
 
-            return newPattern.HitObjects;
+                foreach (var obj in newPattern.HitObjects)
+                    yield return obj;
+            }
         }
 
         /// <summary>
@@ -138,27 +144,44 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
             Patterns.PatternGenerator conversion = null;
 
             if (distanceData != null)
-                conversion = new DistanceObjectPatternGenerator(random, original, beatmap, lastPattern, originalBeatmap);
+            {
+                var generator = new DistanceObjectPatternGenerator(Random, original, beatmap, lastPattern, originalBeatmap);
+                conversion = generator;
+
+                for (double time = original.StartTime; !Precision.DefinitelyBigger(time, generator.EndTime); time += generator.SegmentDuration)
+                {
+                    recordNote(time, positionData?.Position ?? Vector2.Zero);
+                    computeDensity(time);
+                }
+            }
             else if (endTimeData != null)
-                conversion = new EndTimeObjectPatternGenerator(random, original, beatmap, originalBeatmap);
+            {
+                conversion = new EndTimeObjectPatternGenerator(Random, original, beatmap, originalBeatmap);
+
+                recordNote(endTimeData.EndTime, new Vector2(256, 192));
+                computeDensity(endTimeData.EndTime);
+            }
             else if (positionData != null)
             {
                 computeDensity(original.StartTime);
 
-                conversion = new HitObjectPatternGenerator(random, original, beatmap, lastPattern, lastTime, lastPosition, density, lastStair, originalBeatmap);
+                conversion = new HitObjectPatternGenerator(Random, original, beatmap, lastPattern, lastTime, lastPosition, density, lastStair, originalBeatmap);
 
                 recordNote(original.StartTime, positionData.Position);
             }
 
             if (conversion == null)
-                return null;
+                yield break;
 
-            Pattern newPattern = conversion.Generate();
+            foreach (var newPattern in conversion.Generate())
+            {
+                lastPattern = conversion is EndTimeObjectPatternGenerator ? lastPattern : newPattern;
+                lastStair = (conversion as HitObjectPatternGenerator)?.StairType ?? lastStair;
 
-            lastPattern = conversion is EndTimeObjectPatternGenerator ? lastPattern : newPattern;
-            lastStair = (conversion as HitObjectPatternGenerator)?.StairType ?? lastStair;
+                foreach (var obj in newPattern.HitObjects)
+                    yield return obj;
 
-            return newPattern.HitObjects;
+            }
         }
 
         /// <summary>
@@ -171,7 +194,12 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
             {
             }
 
-            public override Pattern Generate()
+            public override IEnumerable<Pattern> Generate()
+            {
+                yield return generate();
+            }
+
+            private Pattern generate()
             {
                 var endTimeData = HitObject as IHasEndTime;
                 var positionData = HitObject as IHasXPosition;
@@ -219,7 +247,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps
                 double segmentTime = (curveData.EndTime - HitObject.StartTime) / curveData.SpanCount();
 
                 int index = (int)(segmentTime == 0 ? 0 : (time - HitObject.StartTime) / segmentTime);
-                return curveData.RepeatSamples[index];
+                return curveData.NodeSamples[index];
             }
         }
     }

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

@@ -4,6 +4,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using osu.Framework.MathUtils;
 using osu.Game.Audio;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Mania.MathUtils;
@@ -24,8 +25,9 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// </summary>
         private const float osu_base_scoring_distance = 100;
 
-        private readonly double endTime;
-        private readonly double segmentDuration;
+        public readonly double EndTime;
+        public readonly double SegmentDuration;
+
         private readonly int spanCount;
 
         private PatternType convertType;
@@ -52,77 +54,105 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             // The duration of the osu! hit object
             double osuDuration = distance / osuVelocity;
 
-            endTime = hitObject.StartTime + osuDuration;
-            segmentDuration = (endTime - HitObject.StartTime) / spanCount;
+            EndTime = hitObject.StartTime + osuDuration;
+            SegmentDuration = (EndTime - HitObject.StartTime) / spanCount;
         }
 
-        public override Pattern Generate()
+        public override IEnumerable<Pattern> Generate()
+        {
+            var originalPattern = generate();
+
+            if (originalPattern.HitObjects.Count() == 1)
+            {
+                yield return originalPattern;
+                yield break;
+            }
+
+            // We need to split the intermediate pattern into two new patterns:
+            // 1. A pattern containing all objects that do not end at our EndTime.
+            // 2. A pattern containing all objects that end at our EndTime. This will be used for further pattern generation.
+            var intermediatePattern = new Pattern();
+            var endTimePattern = new Pattern();
+
+            foreach (var obj in originalPattern.HitObjects)
+            {
+                if (!Precision.AlmostEquals(EndTime, (obj as IHasEndTime)?.EndTime ?? obj.StartTime))
+                    intermediatePattern.Add(obj);
+                else
+                    endTimePattern.Add(obj);
+            }
+
+            yield return intermediatePattern;
+            yield return endTimePattern;
+        }
+
+        private Pattern generate()
         {
             if (TotalColumns == 1)
             {
                 var pattern = new Pattern();
-                addToPattern(pattern, 0, HitObject.StartTime, endTime);
+                addToPattern(pattern, 0, HitObject.StartTime, EndTime);
                 return pattern;
             }
 
             if (spanCount > 1)
             {
-                if (segmentDuration <= 90)
+                if (SegmentDuration <= 90)
                     return generateRandomHoldNotes(HitObject.StartTime, 1);
 
-                if (segmentDuration <= 120)
+                if (SegmentDuration <= 120)
                 {
                     convertType |= PatternType.ForceNotStack;
                     return generateRandomNotes(HitObject.StartTime, spanCount + 1);
                 }
 
-                if (segmentDuration <= 160)
+                if (SegmentDuration <= 160)
                     return generateStair(HitObject.StartTime);
 
-                if (segmentDuration <= 200 && ConversionDifficulty > 3)
+                if (SegmentDuration <= 200 && ConversionDifficulty > 3)
                     return generateRandomMultipleNotes(HitObject.StartTime);
 
-                double duration = endTime - HitObject.StartTime;
+                double duration = EndTime - HitObject.StartTime;
                 if (duration >= 4000)
                     return generateNRandomNotes(HitObject.StartTime, 0.23, 0, 0);
 
-                if (segmentDuration > 400 && spanCount < TotalColumns - 1 - RandomStart)
+                if (SegmentDuration > 400 && spanCount < TotalColumns - 1 - RandomStart)
                     return generateTiledHoldNotes(HitObject.StartTime);
 
                 return generateHoldAndNormalNotes(HitObject.StartTime);
             }
 
-            if (segmentDuration <= 110)
+            if (SegmentDuration <= 110)
             {
                 if (PreviousPattern.ColumnWithObjects < TotalColumns)
                     convertType |= PatternType.ForceNotStack;
                 else
                     convertType &= ~PatternType.ForceNotStack;
-                return generateRandomNotes(HitObject.StartTime, segmentDuration < 80 ? 1 : 2);
+                return generateRandomNotes(HitObject.StartTime, SegmentDuration < 80 ? 1 : 2);
             }
 
             if (ConversionDifficulty > 6.5)
             {
-                if ((convertType & PatternType.LowProbability) > 0)
+                if (convertType.HasFlag(PatternType.LowProbability))
                     return generateNRandomNotes(HitObject.StartTime, 0.78, 0.3, 0);
                 return generateNRandomNotes(HitObject.StartTime, 0.85, 0.36, 0.03);
             }
 
             if (ConversionDifficulty > 4)
             {
-                if ((convertType & PatternType.LowProbability) > 0)
+                if (convertType.HasFlag(PatternType.LowProbability))
                     return generateNRandomNotes(HitObject.StartTime, 0.43, 0.08, 0);
                 return generateNRandomNotes(HitObject.StartTime, 0.56, 0.18, 0);
             }
 
             if (ConversionDifficulty > 2.5)
             {
-                if ((convertType & PatternType.LowProbability) > 0)
+                if (convertType.HasFlag(PatternType.LowProbability))
                     return generateNRandomNotes(HitObject.StartTime, 0.3, 0, 0);
                 return generateNRandomNotes(HitObject.StartTime, 0.37, 0.08, 0);
             }
 
-            if ((convertType & PatternType.LowProbability) > 0)
+            if (convertType.HasFlag(PatternType.LowProbability))
                 return generateNRandomNotes(HitObject.StartTime, 0.17, 0, 0);
             return generateNRandomNotes(HitObject.StartTime, 0.27, 0, 0);
         }
@@ -143,20 +173,19 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             var pattern = new Pattern();
 
             int usableColumns = TotalColumns - RandomStart - PreviousPattern.ColumnWithObjects;
-            int nextColumn = Random.Next(RandomStart, TotalColumns);
+            int nextColumn = GetRandomColumn();
             for (int i = 0; i < Math.Min(usableColumns, noteCount); i++)
             {
-                while (pattern.ColumnHasObject(nextColumn) || PreviousPattern.ColumnHasObject(nextColumn))  //find available column
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-                addToPattern(pattern, nextColumn, startTime, endTime);
+                // Find available column
+                nextColumn = FindAvailableColumn(nextColumn, pattern, PreviousPattern);
+                addToPattern(pattern, nextColumn, startTime, EndTime);
             }
 
             // This is can't be combined with the above loop due to RNG
             for (int i = 0; i < noteCount - usableColumns; i++)
             {
-                while (pattern.ColumnHasObject(nextColumn))
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-                addToPattern(pattern, nextColumn, startTime, endTime);
+                nextColumn = FindAvailableColumn(nextColumn, pattern);
+                addToPattern(pattern, nextColumn, startTime, EndTime);
             }
 
             return pattern;
@@ -179,21 +208,16 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             var pattern = new Pattern();
 
             int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
-            if ((convertType & PatternType.ForceNotStack) > 0 && PreviousPattern.ColumnWithObjects < TotalColumns)
-            {
-                while (PreviousPattern.ColumnHasObject(nextColumn))
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-            }
+            if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
+                nextColumn = FindAvailableColumn(nextColumn, PreviousPattern);
 
             int lastColumn = nextColumn;
             for (int i = 0; i < noteCount; i++)
             {
                 addToPattern(pattern, nextColumn, startTime, startTime);
-                while (nextColumn == lastColumn)
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-
+                nextColumn = FindAvailableColumn(nextColumn, validation: c => c != lastColumn);
                 lastColumn = nextColumn;
-                startTime += segmentDuration;
+                startTime += SegmentDuration;
             }
 
             return pattern;
@@ -223,7 +247,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             for (int i = 0; i <= spanCount; i++)
             {
                 addToPattern(pattern, column, startTime, startTime);
-                startTime += segmentDuration;
+                startTime += SegmentDuration;
 
                 // Check if we're at the borders of the stage, and invert the pattern if so
                 if (increasing)
@@ -283,8 +307,8 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                 if (TotalColumns > 2)
                     addToPattern(pattern, nextColumn, startTime, startTime);
 
-                nextColumn = Random.Next(RandomStart, TotalColumns);
-                startTime += segmentDuration;
+                nextColumn = GetRandomColumn();
+                startTime += SegmentDuration;
             }
 
             return pattern;
@@ -331,7 +355,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
             bool isDoubleSample(SampleInfo sample) => sample.Name == SampleInfo.HIT_CLAP || sample.Name == SampleInfo.HIT_FINISH;
 
-            bool canGenerateTwoNotes = (convertType & PatternType.LowProbability) == 0;
+            bool canGenerateTwoNotes = !convertType.HasFlag(PatternType.LowProbability);
             canGenerateTwoNotes &= HitObject.Samples.Any(isDoubleSample) || sampleInfoListAt(HitObject.StartTime).Any(isDoubleSample);
 
             if (canGenerateTwoNotes)
@@ -361,19 +385,14 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             int columnRepeat = Math.Min(spanCount, TotalColumns);
 
             int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
-            if ((convertType & PatternType.ForceNotStack) > 0 && PreviousPattern.ColumnWithObjects < TotalColumns)
-            {
-                while (PreviousPattern.ColumnHasObject(nextColumn))
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-            }
+            if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
+                nextColumn = FindAvailableColumn(nextColumn, PreviousPattern);
 
             for (int i = 0; i < columnRepeat; i++)
             {
-                while (pattern.ColumnHasObject(nextColumn))
-                    nextColumn = Random.Next(RandomStart, TotalColumns);
-
-                addToPattern(pattern, nextColumn, startTime, endTime);
-                startTime += segmentDuration;
+                nextColumn = FindAvailableColumn(nextColumn, pattern);
+                addToPattern(pattern, nextColumn, startTime, EndTime);
+                startTime += SegmentDuration;
             }
 
             return pattern;
@@ -395,16 +414,13 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             var pattern = new Pattern();
 
             int holdColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
-            if ((convertType & PatternType.ForceNotStack) > 0 && PreviousPattern.ColumnWithObjects < TotalColumns)
-            {
-                while (PreviousPattern.ColumnHasObject(holdColumn))
-                    holdColumn = Random.Next(RandomStart, TotalColumns);
-            }
+            if (convertType.HasFlag(PatternType.ForceNotStack) && PreviousPattern.ColumnWithObjects < TotalColumns)
+                holdColumn = FindAvailableColumn(holdColumn, PreviousPattern);
 
             // Create the hold note
-            addToPattern(pattern, holdColumn, startTime, endTime);
+            addToPattern(pattern, holdColumn, startTime, EndTime);
 
-            int nextColumn = Random.Next(RandomStart, TotalColumns);
+            int nextColumn = GetRandomColumn();
             int noteCount;
             if (ConversionDifficulty > 6.5)
                 noteCount = GetRandomNoteCount(0.63, 0);
@@ -425,8 +441,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                 {
                     for (int j = 0; j < noteCount; j++)
                     {
-                        while (rowPattern.ColumnHasObject(nextColumn) || nextColumn == holdColumn)
-                            nextColumn = Random.Next(RandomStart, TotalColumns);
+                        nextColumn = FindAvailableColumn(nextColumn, validation: c => c != holdColumn, patterns: rowPattern);
                         addToPattern(rowPattern, nextColumn, startTime, startTime);
                     }
                 }
@@ -434,7 +449,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                 pattern.Add(rowPattern);
                 rowPattern.Clear();
 
-                startTime += segmentDuration;
+                startTime += SegmentDuration;
             }
 
             return pattern;
@@ -452,10 +467,10 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             if (curveData == null)
                 return HitObject.Samples;
 
-            double segmentTime = (endTime - HitObject.StartTime) / spanCount;
+            double segmentTime = (EndTime - HitObject.StartTime) / spanCount;
 
             int index = (int)(segmentTime == 0 ? 0 : (time - HitObject.StartTime) / segmentTime);
-            return curveData.RepeatSamples[index];
+            return curveData.NodeSamples[index];
         }
 
         /// <summary>

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

@@ -19,45 +19,37 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         public EndTimeObjectPatternGenerator(FastRandom random, HitObject hitObject, ManiaBeatmap beatmap, IBeatmap originalBeatmap)
             : base(random, hitObject, beatmap, new Pattern(), originalBeatmap)
         {
-            var endtimeData = HitObject as IHasEndTime;
-
-            endTime = endtimeData?.EndTime ?? 0;
+            endTime = (HitObject as IHasEndTime)?.EndTime ?? 0;
         }
 
-        public override Pattern Generate()
+        public override IEnumerable<Pattern> Generate()
+        {
+            yield return generate();
+        }
+
+        private Pattern generate()
         {
             var pattern = new Pattern();
 
             bool generateHold = endTime - HitObject.StartTime >= 100;
 
-            if (TotalColumns == 8)
+            switch (TotalColumns)
             {
-                if (HitObject.Samples.Any(s => s.Name == SampleInfo.HIT_FINISH) && endTime - HitObject.StartTime < 1000)
+                case 8 when HitObject.Samples.Any(s => s.Name == SampleInfo.HIT_FINISH) && endTime - HitObject.StartTime < 1000:
                     addToPattern(pattern, 0, generateHold);
-                else
-                    addToPattern(pattern, getNextRandomColumn(RandomStart), generateHold);
+                    break;
+                case 8:
+                    addToPattern(pattern, FindAvailableColumn(GetRandomColumn(), PreviousPattern), generateHold);
+                    break;
+                default:
+                    if (TotalColumns > 0)
+                        addToPattern(pattern, GetRandomColumn(), generateHold);
+                    break;
             }
-            else if (TotalColumns > 0)
-                addToPattern(pattern, getNextRandomColumn(0), generateHold);
 
             return pattern;
         }
 
-        /// <summary>
-        /// Picks a random column after a column.
-        /// </summary>
-        /// <param name="start">The starting column.</param>
-        /// <returns>A random column after <paramref name="start"/>.</returns>
-        private int getNextRandomColumn(int start)
-        {
-            int nextColumn = Random.Next(start, TotalColumns);
-
-            while (PreviousPattern.ColumnHasObject(nextColumn))
-                nextColumn = Random.Next(start, TotalColumns);
-
-            return nextColumn;
-        }
-
         /// <summary>
         /// Constructs and adds a note to a pattern.
         /// </summary>

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

@@ -2,8 +2,9 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System;
+using System.Collections.Generic;
 using System.Linq;
-using OpenTK;
+using osuTK;
 using osu.Game.Audio;
 using osu.Game.Beatmaps;
 using osu.Game.Beatmaps.ControlPoints;
@@ -20,12 +21,10 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 
         private readonly PatternType convertType;
 
-        public HitObjectPatternGenerator(FastRandom random, HitObject hitObject, ManiaBeatmap beatmap, Pattern previousPattern, double previousTime, Vector2 previousPosition, double density, PatternType lastStair, IBeatmap originalBeatmap)
+        public HitObjectPatternGenerator(FastRandom random, HitObject hitObject, ManiaBeatmap beatmap, Pattern previousPattern, double previousTime, Vector2 previousPosition, double density,
+                                         PatternType lastStair, IBeatmap originalBeatmap)
             : base(random, hitObject, beatmap, previousPattern, originalBeatmap)
         {
-            if (previousTime > hitObject.StartTime) throw new ArgumentOutOfRangeException(nameof(previousTime));
-            if (density < 0) throw new ArgumentOutOfRangeException(nameof(density));
-
             StairType = lastStair;
 
             TimingControlPoint timingPoint = beatmap.ControlPointInfo.TimingPointAt(hitObject.StartTime);
@@ -78,131 +77,137 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             else
                 convertType |= PatternType.LowProbability;
 
-            if ((convertType & PatternType.KeepSingle) == 0)
+            if (!convertType.HasFlag(PatternType.KeepSingle))
             {
                 if (HitObject.Samples.Any(s => s.Name == SampleInfo.HIT_FINISH) && TotalColumns != 8)
                     convertType |= PatternType.Mirror;
-                else
+                else if (HitObject.Samples.Any(s => s.Name == SampleInfo.HIT_CLAP))
                     convertType |= PatternType.Gathered;
             }
         }
 
-        public override Pattern Generate()
+        public override IEnumerable<Pattern> Generate()
         {
-            if (TotalColumns == 1)
+            yield return generate();
+        }
+
+        private Pattern generate()
+        {
+            var pattern = new Pattern();
+
+            try
             {
-                var pattern = new Pattern();
-                addToPattern(pattern, 0);
-                return pattern;
-            }
-
-            int lastColumn = PreviousPattern.HitObjects.FirstOrDefault()?.Column ?? 0;
-
-            if ((convertType & PatternType.Reverse) > 0 && PreviousPattern.HitObjects.Any())
-            {
-                // Generate a new pattern by copying the last hit objects in reverse-column order
-                var pattern = new Pattern();
-
-                for (int i = RandomStart; i < TotalColumns; i++)
-                    if (PreviousPattern.ColumnHasObject(i))
-                        addToPattern(pattern, RandomStart + TotalColumns - i - 1);
-
-                return pattern;
-            }
-
-            if ((convertType & PatternType.Cycle) > 0 && PreviousPattern.HitObjects.Count() == 1
-                // If we convert to 7K + 1, let's not overload the special key
-                && (TotalColumns != 8 || lastColumn != 0)
-                // Make sure the last column was not the centre column
-                && (TotalColumns % 2 == 0 || lastColumn != TotalColumns / 2))
-            {
-                // Generate a new pattern by cycling backwards (similar to Reverse but for only one hit object)
-                var pattern = new Pattern();
-
-                int column = RandomStart + TotalColumns - lastColumn - 1;
-                addToPattern(pattern, column);
-
-                return pattern;
-            }
-
-            if ((convertType & PatternType.ForceStack) > 0 && PreviousPattern.HitObjects.Any())
-            {
-                // Generate a new pattern by placing on the already filled columns
-                var pattern = new Pattern();
-
-                for (int i = RandomStart; i < TotalColumns; i++)
-                    if (PreviousPattern.ColumnHasObject(i))
-                        addToPattern(pattern, i);
-
-                return pattern;
-            }
-
-            if ((convertType & PatternType.Stair) > 0 && PreviousPattern.HitObjects.Count() == 1)
-            {
-                // Generate a new pattern by placing on the next column, cycling back to the start if there is no "next"
-                var pattern = new Pattern();
-
-                int targetColumn = lastColumn + 1;
-                if (targetColumn == TotalColumns)
+                if (TotalColumns == 1)
                 {
-                    targetColumn = RandomStart;
-                    StairType = PatternType.ReverseStair;
+                    addToPattern(pattern, 0);
+                    return pattern;
                 }
 
-                addToPattern(pattern, targetColumn);
-                return pattern;
-            }
+                int lastColumn = PreviousPattern.HitObjects.FirstOrDefault()?.Column ?? 0;
 
-            if ((convertType & PatternType.ReverseStair) > 0 && PreviousPattern.HitObjects.Count() == 1)
-            {
-                // Generate a new pattern by placing on the previous column, cycling back to the end if there is no "previous"
-                var pattern = new Pattern();
-
-                int targetColumn = lastColumn - 1;
-                if (targetColumn == RandomStart - 1)
+                if (convertType.HasFlag(PatternType.Reverse) && PreviousPattern.HitObjects.Any())
                 {
-                    targetColumn = TotalColumns - 1;
-                    StairType = PatternType.Stair;
+                    // Generate a new pattern by copying the last hit objects in reverse-column order
+                    for (int i = RandomStart; i < TotalColumns; i++)
+                        if (PreviousPattern.ColumnHasObject(i))
+                            addToPattern(pattern, RandomStart + TotalColumns - i - 1);
+
+                    return pattern;
                 }
 
-                addToPattern(pattern, targetColumn);
-                return pattern;
-            }
+                if (convertType.HasFlag(PatternType.Cycle) && PreviousPattern.HitObjects.Count() == 1
+                                                          // If we convert to 7K + 1, let's not overload the special key
+                                                          && (TotalColumns != 8 || lastColumn != 0)
+                                                          // Make sure the last column was not the centre column
+                                                          && (TotalColumns % 2 == 0 || lastColumn != TotalColumns / 2))
+                {
+                    // Generate a new pattern by cycling backwards (similar to Reverse but for only one hit object)
+                    int column = RandomStart + TotalColumns - lastColumn - 1;
+                    addToPattern(pattern, column);
 
-            if ((convertType & PatternType.KeepSingle) > 0)
-                return generateRandomNotes(1);
+                    return pattern;
+                }
+
+                if (convertType.HasFlag(PatternType.ForceStack) && PreviousPattern.HitObjects.Any())
+                {
+                    // Generate a new pattern by placing on the already filled columns
+                    for (int i = RandomStart; i < TotalColumns; i++)
+                        if (PreviousPattern.ColumnHasObject(i))
+                            addToPattern(pattern, i);
+
+                    return pattern;
+                }
+
+                if (PreviousPattern.HitObjects.Count() == 1)
+                {
+                    if (convertType.HasFlag(PatternType.Stair))
+                    {
+                        // Generate a new pattern by placing on the next column, cycling back to the start if there is no "next"
+                        int targetColumn = lastColumn + 1;
+                        if (targetColumn == TotalColumns)
+                            targetColumn = RandomStart;
+
+                        addToPattern(pattern, targetColumn);
+                        return pattern;
+                    }
+
+                    if (convertType.HasFlag(PatternType.ReverseStair))
+                    {
+                        // Generate a new pattern by placing on the previous column, cycling back to the end if there is no "previous"
+                        int targetColumn = lastColumn - 1;
+                        if (targetColumn == RandomStart - 1)
+                            targetColumn = TotalColumns - 1;
+
+                        addToPattern(pattern, targetColumn);
+                        return pattern;
+                    }
+                }
+
+                if (convertType.HasFlag(PatternType.KeepSingle))
+                    return pattern = generateRandomNotes(1);
+
+                if (convertType.HasFlag(PatternType.Mirror))
+                {
+                    if (ConversionDifficulty > 6.5)
+                        return pattern = generateRandomPatternWithMirrored(0.12, 0.38, 0.12);
+                    if (ConversionDifficulty > 4)
+                        return pattern = generateRandomPatternWithMirrored(0.12, 0.17, 0);
+                    return pattern = generateRandomPatternWithMirrored(0.12, 0, 0);
+                }
 
-            if ((convertType & PatternType.Mirror) > 0)
-            {
                 if (ConversionDifficulty > 6.5)
-                    return generateRandomPatternWithMirrored(0.12, 0.38, 0.12);
+                {
+                    if (convertType.HasFlag(PatternType.LowProbability))
+                        return pattern = generateRandomPattern(0.78, 0.42, 0, 0);
+                    return pattern = generateRandomPattern(1, 0.62, 0, 0);
+                }
+
                 if (ConversionDifficulty > 4)
-                    return generateRandomPatternWithMirrored(0.12, 0.17, 0);
-                return generateRandomPatternWithMirrored(0.12, 0, 0);
-            }
+                {
+                    if (convertType.HasFlag(PatternType.LowProbability))
+                        return pattern = generateRandomPattern(0.35, 0.08, 0, 0);
+                    return pattern = generateRandomPattern(0.52, 0.15, 0, 0);
+                }
 
-            if (ConversionDifficulty > 6.5)
+                if (ConversionDifficulty > 2)
+                {
+                    if (convertType.HasFlag(PatternType.LowProbability))
+                        return pattern = generateRandomPattern(0.18, 0, 0, 0);
+                    return pattern = generateRandomPattern(0.45, 0, 0, 0);
+                }
+
+                return pattern = generateRandomPattern(0, 0, 0, 0);
+            }
+            finally
             {
-                if ((convertType & PatternType.LowProbability) > 0)
-                    return generateRandomPattern(0.78, 0.42, 0, 0);
-                return generateRandomPattern(1, 0.62, 0, 0);
+                foreach (var obj in pattern.HitObjects)
+                {
+                    if (convertType.HasFlag(PatternType.Stair) && obj.Column == TotalColumns - 1)
+                        StairType = PatternType.ReverseStair;
+                    if (convertType.HasFlag(PatternType.ReverseStair) && obj.Column == RandomStart)
+                        StairType = PatternType.Stair;
+                }
             }
-
-            if (ConversionDifficulty > 4)
-            {
-                if ((convertType & PatternType.LowProbability) > 0)
-                    return generateRandomPattern(0.35, 0.08, 0, 0);
-                return generateRandomPattern(0.52, 0.15, 0, 0);
-            }
-
-            if (ConversionDifficulty > 2)
-            {
-                if ((convertType & PatternType.LowProbability) > 0)
-                    return generateRandomPattern(0.18, 0, 0, 0);
-                return generateRandomPattern(0.45, 0, 0, 0);
-            }
-
-            return generateRandomPattern(0, 0, 0, 0);
         }
 
         /// <summary>
@@ -218,7 +223,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         {
             var pattern = new Pattern();
 
-            bool allowStacking = (convertType & PatternType.ForceNotStack) == 0;
+            bool allowStacking = !convertType.HasFlag(PatternType.ForceNotStack);
 
             if (!allowStacking)
                 noteCount = Math.Min(noteCount, TotalColumns - RandomStart - PreviousPattern.ColumnWithObjects);
@@ -226,22 +231,27 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
             int nextColumn = GetColumn((HitObject as IHasXPosition)?.X ?? 0, true);
             for (int i = 0; i < noteCount; i++)
             {
-                while (pattern.ColumnHasObject(nextColumn) || PreviousPattern.ColumnHasObject(nextColumn) && !allowStacking)
-                {
-                    if ((convertType & PatternType.Gathered) > 0)
-                    {
-                        nextColumn++;
-                        if (nextColumn == TotalColumns)
-                            nextColumn = RandomStart;
-                    }
-                    else
-                        nextColumn = Random.Next(RandomStart, TotalColumns);
-                }
+                nextColumn = allowStacking
+                    ? FindAvailableColumn(nextColumn, nextColumn: getNextColumn, patterns: pattern)
+                    : FindAvailableColumn(nextColumn, nextColumn: getNextColumn, patterns: new[] { pattern, PreviousPattern });
 
                 addToPattern(pattern, nextColumn);
             }
 
             return pattern;
+
+            int getNextColumn(int last)
+            {
+                if (convertType.HasFlag(PatternType.Gathered))
+                {
+                    last++;
+                    if (last == TotalColumns)
+                        last = RandomStart;
+                }
+                else
+                    last = GetRandomColumn();
+                return last;
+            }
         }
 
         /// <summary>
@@ -278,17 +288,19 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
         private Pattern generateRandomPatternWithMirrored(double centreProbability, double p2, double p3)
         {
+            if (convertType.HasFlag(PatternType.ForceNotStack))
+                return generateRandomPattern(1 / 2f + p2 / 2, p2, (p2 + p3) / 2, p3);
+
             var pattern = new Pattern();
 
             bool addToCentre;
             int noteCount = getRandomNoteCountMirrored(centreProbability, p2, p3, out addToCentre);
 
             int columnLimit = (TotalColumns % 2 == 0 ? TotalColumns : TotalColumns - 1) / 2;
-            int nextColumn = Random.Next(RandomStart, columnLimit);
+            int nextColumn = GetRandomColumn(upperBound: columnLimit);
             for (int i = 0; i < noteCount; i++)
             {
-                while (pattern.ColumnHasObject(nextColumn))
-                    nextColumn = Random.Next(RandomStart, columnLimit);
+                nextColumn = FindAvailableColumn(nextColumn, upperBound: columnLimit, patterns: pattern);
 
                 // Add normal note
                 addToPattern(pattern, nextColumn);
@@ -360,9 +372,6 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         {
             addToCentre = false;
 
-            if ((convertType & PatternType.ForceNotStack) > 0)
-                return getRandomNoteCount(1 / 2f + p2 / 2, p2, (p2 + p3) / 2, p3);
-
             switch (TotalColumns)
             {
                 case 2:

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

@@ -3,10 +3,11 @@
 
 using System;
 using System.Linq;
+using JetBrains.Annotations;
 using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Mania.MathUtils;
 using osu.Game.Rulesets.Objects;
-using OpenTK;
+using osuTK;
 
 namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
 {
@@ -90,6 +91,7 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
         }
 
         private double? conversionDifficulty;
+
         /// <summary>
         /// A difficulty factor used for various conversion methods from osu!stable.
         /// </summary>
@@ -103,21 +105,95 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns.Legacy
                 HitObject lastObject = OriginalBeatmap.HitObjects.LastOrDefault();
                 HitObject firstObject = OriginalBeatmap.HitObjects.FirstOrDefault();
 
-                double drainTime = (lastObject?.StartTime ?? 0) - (firstObject?.StartTime ?? 0);
-                drainTime -= OriginalBeatmap.TotalBreakTime;
+                // Drain time in seconds
+                int drainTime = (int)(((lastObject?.StartTime ?? 0) - (firstObject?.StartTime ?? 0) - OriginalBeatmap.TotalBreakTime) / 1000);
 
                 if (drainTime == 0)
-                    drainTime = 10000000;
-
-                // We need this in seconds
-                drainTime /= 1000;
+                    drainTime = 10000;
 
                 BeatmapDifficulty difficulty = OriginalBeatmap.BeatmapInfo.BaseDifficulty;
-                conversionDifficulty = ((difficulty.DrainRate + MathHelper.Clamp(difficulty.ApproachRate, 4, 7)) / 1.5 + 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;
             }
         }
+
+        /// <summary>
+        /// Finds a new column in which a <see cref="HitObject"/> can be placed.
+        /// This uses <see cref="GetRandomColumn"/> to pick the next candidate column.
+        /// </summary>
+        /// <param name="initialColumn">The initial column to test. This may be returned if it is already a valid column.</param>
+        /// <param name="patterns">A list of patterns for which the validity of a column should be checked against.
+        /// A column is not a valid candidate if a <see cref="HitObject"/> occupies the same column in any of the patterns.</param>
+        /// <returns>A column for which there are no <see cref="HitObject"/>s in any of <paramref name="patterns"/> occupying the same column.</returns>
+        /// <exception cref="NotEnoughColumnsException">If there are no valid candidate columns.</exception>
+        protected int FindAvailableColumn(int initialColumn, params Pattern[] patterns)
+            => FindAvailableColumn(initialColumn, null, patterns: patterns);
+
+        /// <summary>
+        /// Finds a new column in which a <see cref="HitObject"/> can be placed.
+        /// </summary>
+        /// <param name="initialColumn">The initial column to test. This may be returned if it is already a valid column.</param>
+        /// <param name="nextColumn">A function to retrieve the next column. If null, a randomisation scheme will be used.</param>
+        /// <param name="validation">A function to perform additional validation checks to determine if a column is a valid candidate for a <see cref="HitObject"/>.</param>
+        /// <param name="lowerBound">The minimum column index. If null, <see cref="RandomStart"/> is used.</param>
+        /// <param name="upperBound">The maximum column index. If null, <see cref="PatternGenerator.TotalColumns"/> is used.</param>
+        /// <param name="patterns">A list of patterns for which the validity of a column should be checked against.
+        /// A column is not a valid candidate if a <see cref="HitObject"/> occupies the same column in any of the patterns.</param>
+        /// <returns>A column which has passed the <paramref name="validation"/> check and for which there are no
+        /// <see cref="HitObject"/>s in any of <paramref name="patterns"/> occupying the same column.</returns>
+        /// <exception cref="NotEnoughColumnsException">If there are no valid candidate columns.</exception>
+        protected int FindAvailableColumn(int initialColumn, int? lowerBound = null, int? upperBound = null, Func<int, int> nextColumn = null, [InstantHandle] Func<int, bool> validation = null,
+                                          params Pattern[] patterns)
+        {
+            lowerBound = lowerBound ?? RandomStart;
+            upperBound = upperBound ?? TotalColumns;
+            nextColumn = nextColumn ?? (_ => GetRandomColumn(lowerBound, upperBound));
+
+            // Check for the initial column
+            if (isValid(initialColumn))
+                return initialColumn;
+
+            // Ensure that we have at least one free column, so that an endless loop is avoided
+            bool hasValidColumns = false;
+            for (int i = lowerBound.Value; i < upperBound.Value; i++)
+            {
+                hasValidColumns = isValid(i);
+                if (hasValidColumns)
+                    break;
+            }
+
+            if (!hasValidColumns)
+                throw new NotEnoughColumnsException();
+
+            // Iterate until a valid column is found. This is a random iteration in the default case.
+            do
+            {
+                initialColumn = nextColumn(initialColumn);
+            } while (!isValid(initialColumn));
+
+            return initialColumn;
+
+            bool isValid(int column) => validation?.Invoke(column) != false && !patterns.Any(p => p.ColumnHasObject(column));
+        }
+
+        /// <summary>
+        /// Returns a random column index in the range [<paramref name="lowerBound"/>, <paramref name="upperBound"/>).
+        /// </summary>
+        /// <param name="lowerBound">The minimum column index. If null, <see cref="RandomStart"/> is used.</param>
+        /// <param name="upperBound">The maximum column index. If null, <see cref="PatternGenerator.TotalColumns"/> is used.</param>
+        protected int GetRandomColumn(int? lowerBound = null, int? upperBound = null) => Random.Next(lowerBound ?? RandomStart, upperBound ?? TotalColumns);
+
+        /// <summary>
+        /// Occurs when mania conversion is stuck in an infinite loop unable to find columns to place new hitobjects in.
+        /// </summary>
+        public class NotEnoughColumnsException : Exception
+        {
+            public NotEnoughColumnsException()
+                : base("There were not enough columns to complete conversion.")
+            {
+            }
+        }
     }
 }

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

@@ -2,6 +2,7 @@
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
 using System;
+using System.Collections.Generic;
 using osu.Game.Rulesets.Objects;
 
 namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns
@@ -42,9 +43,9 @@ namespace osu.Game.Rulesets.Mania.Beatmaps.Patterns
         }
 
         /// <summary>
-        /// Generates the pattern for <see cref="HitObject"/>, filled with hit objects.
+        /// Generates the patterns for <see cref="HitObject"/>, each filled with hit objects.
         /// </summary>
-        /// <returns>The <see cref="Pattern"/> containing the hit objects.</returns>
-        public abstract Pattern Generate();
+        /// <returns>The <see cref="Pattern"/>s containing the hit objects.</returns>
+        public abstract IEnumerable<Pattern> Generate();
     }
 }

osu.Game.Rulesets.Mania/Configuration/ManiaConfigManager.cs

@@ -19,7 +19,7 @@ namespace osu.Game.Rulesets.Mania.Configuration
         {
             base.InitialiseDefaults();
 
-            Set(ManiaSetting.ScrollTime, 1500.0, 50.0, 10000.0, 50.0);
+            Set(ManiaSetting.ScrollTime, 2250.0, 50.0, 10000.0, 50.0);
             Set(ManiaSetting.ScrollDirection, ManiaScrollingDirection.Down);
         }
 

osu.Game.Rulesets.Mania/Difficulty/ManiaPerformanceCalculator.cs

@@ -8,6 +8,7 @@ using osu.Game.Beatmaps;
 using osu.Game.Rulesets.Difficulty;
 using osu.Game.Rulesets.Mods;
 using osu.Game.Rulesets.Scoring;
+using osu.Game.Scoring;
 
 namespace osu.Game.Rulesets.Mania.Difficulty
 {
@@ -27,7 +28,7 @@ namespace osu.Game.Rulesets.Mania.Difficulty
         private int countMeh;
         private int countMiss;
 
-        public ManiaPerformanceCalculator(Ruleset ruleset, WorkingBeatmap beatmap, Score score)
+        public ManiaPerformanceCalculator(Ruleset ruleset, WorkingBeatmap beatmap, ScoreInfo score)
             : base(ruleset, beatmap, score)
         {
         }

osu.Game.Rulesets.Mania/Edit/Blueprints/Components/EditBodyPiece.cs

@@ -0,0 +1,21 @@
+// 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.Game.Graphics;
+using osu.Game.Rulesets.Mania.Objects.Drawables.Pieces;
+
+namespace osu.Game.Rulesets.Mania.Edit.Blueprints.Components
+{
+    public class EditBodyPiece : BodyPiece
+    {
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            AccentColour = colours.Yellow;
+
+            Background.Alpha = 0.5f;
+            Foreground.Alpha = 0;
+        }
+    }
+}

osu.Game.Rulesets.Mania/Edit/Blueprints/Components/EditNotePiece.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.Framework.Allocation;
+using osu.Framework.Graphics.Containers;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Mania.Objects.Drawables.Pieces;
+
+namespace osu.Game.Rulesets.Mania.Edit.Blueprints.Components
+{
+    public class EditNotePiece : CompositeDrawable
+    {
+        public EditNotePiece()
+        {
+            Height = NotePiece.NOTE_HEIGHT;
+
+            CornerRadius = 5;
+            Masking = true;
+
+            InternalChild = new NotePiece();
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours)
+        {
+            Colour = colours.Yellow;
+        }
+    }
+}

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

@@ -0,0 +1,74 @@
+// Copyright (c) 2007-2018 ppy Pty Ltd <contact@ppy.sh>.
+// Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
+
+using System;
+using osu.Framework.Graphics;
+using osu.Framework.Input.Events;
+using osu.Game.Rulesets.Mania.Edit.Blueprints.Components;
+using osu.Game.Rulesets.Mania.Objects;
+using osuTK;
+
+namespace osu.Game.Rulesets.Mania.Edit.Blueprints
+{
+    public class HoldNotePlacementBlueprint : ManiaPlacementBlueprint<HoldNote>
+    {
+        private readonly EditBodyPiece bodyPiece;
+        private readonly EditNotePiece headPiece;
+        private readonly EditNotePiece tailPiece;
+
+        public HoldNotePlacementBlueprint()
+            : base(new HoldNote())
+        {
+            RelativeSizeAxes = Axes.Both;
+
+            InternalChildren = new Drawable[]
+            {
+                bodyPiece = new EditBodyPiece { Origin = Anchor.TopCentre },
+                headPiece = new EditNotePiece { Origin = Anchor.Centre },
+                tailPiece = new EditNotePiece { Origin = Anchor.Centre }
+            };
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            if (Column != null)
+            {
+                headPiece.Y = PositionAt(HitObject.StartTime);
+                tailPiece.Y = PositionAt(HitObject.EndTime);
+            }
+
+            var topPosition = new Vector2(headPiece.DrawPosition.X, Math.Min(headPiece.DrawPosition.Y, tailPiece.DrawPosition.Y));
+            var bottomPosition = new Vector2(headPiece.DrawPosition.X, Math.Max(headPiece.DrawPosition.Y, tailPiece.DrawPosition.Y));
+
+            bodyPiece.Position = topPosition;
+            bodyPiece.Width = headPiece.Width;
+            bodyPiece.Height = (bottomPosition - topPosition).Y;
+        }
+
+        private double originalStartTime;
+
+        protected override bool OnMouseMove(MouseMoveEvent e)
+        {
+            base.OnMouseMove(e);
+
+            if (PlacementBegun)
+            {
+                var endTime = TimeAt(e.ScreenSpaceMousePosition);
+
+                HitObject.StartTime = endTime < originalStartTime ? endTime : originalStartTime;
+                HitObject.Duration = Math.Abs(endTime - originalStartTime);
+            }
+            else
+            {
+                headPiece.Width = tailPiece.Width = SnappedWidth;
+                headPiece.X = tailPiece.X = SnappedMousePosition.X;
+
+                originalStartTime = HitObject.StartTime = TimeAt(e.ScreenSpaceMousePosition);
+            }
+
+            return true;
+        }
+    }
+}

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

@@ -0,0 +1,84 @@
+// 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.Configuration;
+using osu.Framework.Graphics;
+using osu.Framework.Graphics.Primitives;
+using osu.Game.Graphics;
+using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.Mania.Objects.Drawables.Pieces;
+using osu.Game.Rulesets.UI.Scrolling;
+using osuTK;
+using osuTK.Graphics;
+
+namespace osu.Game.Rulesets.Mania.Edit.Blueprints
+{
+    public class HoldNoteSelectionBlueprint : ManiaSelectionBlueprint
+    {
+        public new DrawableHoldNote HitObject => (DrawableHoldNote)base.HitObject;
+
+        private readonly IBindable<ScrollingDirection> direction = new Bindable<ScrollingDirection>();
+
+        private readonly BodyPiece body;
+
+        public HoldNoteSelectionBlueprint(DrawableHoldNote hold)
+            : base(hold)
+        {
+            InternalChildren = new Drawable[]
+            {
+                new HoldNoteNoteSelectionBlueprint(hold.Head),
+                new HoldNoteNoteSelectionBlueprint(hold.Tail),
+                body = new BodyPiece
+                {
+                    AccentColour = Color4.Transparent
+                },
+            };
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(OsuColour colours, IScrollingInfo scrollingInfo)
+        {
+            body.BorderColour = colours.Yellow;
+
+            direction.BindTo(scrollingInfo.Direction);
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            Size = HitObject.DrawSize + new Vector2(0, HitObject.Tail.DrawHeight);
+
+            // This is a side-effect of not matching the hitobject's anchors/origins, which is kinda hard to do
+            // When scrolling upwards our origin is already at the top of the head note (which is the intended location),
+            // but when scrolling downwards our origin is at the _bottom_ of the tail note (where we need to be at the _top_ of the tail note)
+            if (direction.Value == ScrollingDirection.Down)
+                Y -= HitObject.Tail.DrawHeight;
+        }
+
+        public override Quad SelectionQuad => ScreenSpaceDrawQuad;
+
+        private class HoldNoteNoteSelectionBlueprint : NoteSelectionBlueprint
+        {
+            public HoldNoteNoteSelectionBlueprint(DrawableNote note)
+                : base(note)
+            {
+                Select();
+            }
+
+            protected override void Update()
+            {
+                base.Update();
+
+                Anchor = HitObject.Anchor;
+                Origin = HitObject.Origin;
+
+                Position = HitObject.DrawPosition;
+            }
+
+            // Todo: This is temporary, since the note masks don't do anything special yet. In the future they will handle input.
+            public override bool HandlePositionalInput => false;
+        }
+    }
+}

osu.Game.Rulesets.Mania/Edit/Blueprints/ManiaPlacementBlueprint.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 osu.Framework.Allocation;
+using osu.Framework.Graphics;
+using osu.Framework.Input;
+using osu.Framework.Input.Events;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Mania.Objects.Drawables.Pieces;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Rulesets.UI.Scrolling;
+using osuTK;
+
+namespace osu.Game.Rulesets.Mania.Edit.Blueprints
+{
+    public abstract class ManiaPlacementBlueprint<T> : PlacementBlueprint,
+                                                       IRequireHighFrequencyMousePosition // the playfield could be moving behind us
+        where T : ManiaHitObject
+    {
+        protected new T HitObject => (T)base.HitObject;
+
+        protected Column Column;
+
+        /// <summary>
+        /// The current mouse position, snapped to the closest column.
+        /// </summary>
+        protected Vector2 SnappedMousePosition { get; private set; }
+
+        /// <summary>
+        /// The width of the closest column to the current mouse position.
+        /// </summary>
+        protected float SnappedWidth { get; private set; }
+
+        [Resolved]
+        private IManiaHitObjectComposer composer { get; set; }
+
+        [Resolved]
+        private IScrollingInfo scrollingInfo { get; set; }
+
+        protected ManiaPlacementBlueprint(T hitObject)
+            : base(hitObject)
+        {
+            RelativeSizeAxes = Axes.None;
+        }
+
+        protected override bool OnMouseDown(MouseDownEvent e)
+        {
+            if (Column == null)
+                return base.OnMouseDown(e);
+
+            HitObject.StartTime = TimeAt(e.ScreenSpaceMousePosition);
+            HitObject.Column = Column.Index;
+
+            BeginPlacement();
+            return true;
+        }
+
+        protected override bool OnMouseUp(MouseUpEvent e)
+        {
+            EndPlacement();
+            return base.OnMouseUp(e);
+        }
+
+        protected override bool OnMouseMove(MouseMoveEvent e)
+        {
+            if (!PlacementBegun)
+                Column = ColumnAt(e.ScreenSpaceMousePosition);
+
+            if (Column == null) return false;
+
+            SnappedWidth = Column.DrawWidth;
+
+            // Snap to the column
+            var parentPos = Parent.ToLocalSpace(Column.ToScreenSpace(new Vector2(Column.DrawWidth / 2, 0)));
+            SnappedMousePosition = new Vector2(parentPos.X, e.MousePosition.Y);
+            return true;
+        }
+
+        protected double TimeAt(Vector2 screenSpacePosition)
+        {
+            if (Column == null)
+                return 0;
+
+            var hitObjectContainer = Column.HitObjectContainer;
+
+            // If we're scrolling downwards, a position of 0 is actually further away from the hit target
+            // so we need to flip the vertical coordinate in the hitobject container's space
+            var hitObjectPos = Column.HitObjectContainer.ToLocalSpace(applyPositionOffset(screenSpacePosition, false)).Y;
+            if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
+                hitObjectPos = hitObjectContainer.DrawHeight - hitObjectPos;
+
+            return scrollingInfo.Algorithm.TimeAt(hitObjectPos,
+                EditorClock.CurrentTime,
+                scrollingInfo.TimeRange.Value,
+                hitObjectContainer.DrawHeight);
+        }
+
+        protected float PositionAt(double time)
+        {
+            var pos = scrollingInfo.Algorithm.PositionAt(time,
+                EditorClock.CurrentTime,
+                scrollingInfo.TimeRange.Value,
+                Column.HitObjectContainer.DrawHeight);
+
+            return applyPositionOffset(Column.HitObjectContainer.ToSpaceOfOtherDrawable(new Vector2(0, pos), Parent), true).Y;
+        }
+
+        protected Column ColumnAt(Vector2 screenSpacePosition)
+            => composer.ColumnAt(applyPositionOffset(screenSpacePosition, false));
+
+        private Vector2 applyPositionOffset(Vector2 position, bool reverse)
+        {
+            position.Y += (scrollingInfo.Direction.Value == ScrollingDirection.Up && !reverse ? -1 : 1) * NotePiece.NOTE_HEIGHT / 2;
+            return position;
+        }
+    }
+}

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

@@ -0,0 +1,80 @@
+// 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.Input.Events;
+using osu.Framework.Timing;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.Objects.Drawables;
+using osu.Game.Rulesets.UI.Scrolling;
+using osuTK;
+
+namespace osu.Game.Rulesets.Mania.Edit.Blueprints
+{
+    public class ManiaSelectionBlueprint : SelectionBlueprint
+    {
+        public Vector2 ScreenSpaceDragPosition { get; private set; }
+        public Vector2 DragPosition { get; private set; }
+
+        protected new DrawableManiaHitObject HitObject => (DrawableManiaHitObject)base.HitObject;
+
+        protected IClock EditorClock { get; private set; }
+
+        [Resolved]
+        private IScrollingInfo scrollingInfo { get; set; }
+
+        [Resolved]
+        private IManiaHitObjectComposer composer { get; set; }
+
+        public ManiaSelectionBlueprint(DrawableHitObject hitObject)
+            : base(hitObject)
+        {
+            RelativeSizeAxes = Axes.None;
+        }
+
+        [BackgroundDependencyLoader]
+        private void load(IAdjustableClock clock)
+        {
+            EditorClock = clock;
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            Position = Parent.ToLocalSpace(HitObject.ToScreenSpace(Vector2.Zero));
+        }
+
+        protected override bool OnMouseDown(MouseDownEvent e)
+        {
+            ScreenSpaceDragPosition = e.ScreenSpaceMousePosition;
+            DragPosition = HitObject.ToLocalSpace(e.ScreenSpaceMousePosition);
+
+            return base.OnMouseDown(e);
+        }
+
+        protected override bool OnDrag(DragEvent e)
+        {
+            var result = base.OnDrag(e);
+
+            ScreenSpaceDragPosition = e.ScreenSpaceMousePosition;
+            DragPosition = HitObject.ToLocalSpace(e.ScreenSpaceMousePosition);
+
+            return result;
+        }
+
+        public override void Show()
+        {
+            HitObject.AlwaysAlive = true;
+            base.Show();
+        }
+
+        public override void Hide()
+        {
+            HitObject.AlwaysAlive = false;
+            base.Hide();
+        }
+    }
+}

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

@@ -0,0 +1,30 @@
+// 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.Mania.Edit.Blueprints.Components;
+using osu.Game.Rulesets.Mania.Objects;
+
+namespace osu.Game.Rulesets.Mania.Edit.Blueprints
+{
+    public class NotePlacementBlueprint : ManiaPlacementBlueprint<Note>
+    {
+        public NotePlacementBlueprint()
+            : base(new Note())
+        {
+            Origin = Anchor.Centre;
+
+            AutoSizeAxes = Axes.Y;
+
+            InternalChild = new EditNotePiece { RelativeSizeAxes = Axes.X };
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            Width = SnappedWidth;
+            Position = SnappedMousePosition;
+        }
+    }
+}

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

@@ -0,0 +1,25 @@
+// 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.Mania.Edit.Blueprints.Components;
+using osu.Game.Rulesets.Mania.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Mania.Edit.Blueprints
+{
+    public class NoteSelectionBlueprint : ManiaSelectionBlueprint
+    {
+        public NoteSelectionBlueprint(DrawableNote note)
+            : base(note)
+        {
+            AddInternal(new EditNotePiece { RelativeSizeAxes = Axes.X });
+        }
+
+        protected override void Update()
+        {
+            base.Update();
+
+            Size = HitObject.DrawSize;
+        }
+    }
+}

osu.Game.Rulesets.Mania/Edit/HoldNoteCompositionTool.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.Edit.Tools;
+using osu.Game.Rulesets.Mania.Edit.Blueprints;
+
+namespace osu.Game.Rulesets.Mania.Edit
+{
+    public class HoldNoteCompositionTool : HitObjectCompositionTool
+    {
+        public HoldNoteCompositionTool()
+            : base("Hold")
+        {
+        }
+
+        public override PlacementBlueprint CreatePlacementBlueprint() => new HoldNotePlacementBlueprint();
+    }
+}

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

@@ -0,0 +1,15 @@
+// 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.Mania.UI;
+using osuTK;
+
+namespace osu.Game.Rulesets.Mania.Edit
+{
+    public interface IManiaHitObjectComposer
+    {
+        Column ColumnAt(Vector2 screenSpacePosition);
+
+        int TotalColumns { get; }
+    }
+}

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

@@ -0,0 +1,17 @@
+// 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.Mania.Beatmaps;
+using osu.Game.Rulesets.Mania.UI;
+using System.Collections.Generic;
+
+namespace osu.Game.Rulesets.Mania.Edit
+{
+    public class ManiaEditPlayfield : ManiaPlayfield
+    {
+        public ManiaEditPlayfield(List<StageDefinition> stages)
+            : base(stages)
+        {
+        }
+    }
+}

osu.Game.Rulesets.Mania/Edit/ManiaEditRulesetContainer.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.Framework.Graphics;
+using osuTK;
+using osu.Game.Beatmaps;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Rulesets.UI;
+using osu.Game.Rulesets.UI.Scrolling;
+
+namespace osu.Game.Rulesets.Mania.Edit
+{
+    public class ManiaEditRulesetContainer : ManiaRulesetContainer
+    {
+        public new IScrollingInfo ScrollingInfo => base.ScrollingInfo;
+
+        public ManiaEditRulesetContainer(Ruleset ruleset, WorkingBeatmap beatmap)
+            : base(ruleset, beatmap)
+        {
+        }
+
+        protected override Playfield CreatePlayfield() => new ManiaEditPlayfield(Beatmap.Stages)
+        {
+            Anchor = Anchor.Centre,
+            Origin = Anchor.Centre,
+            Size = Vector2.One
+        };
+    }
+}

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

@@ -0,0 +1,75 @@
+// 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.Rulesets.Edit;
+using osu.Game.Rulesets.Edit.Tools;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.Mania.Objects.Drawables;
+using osu.Game.Rulesets.Objects.Drawables;
+using System.Collections.Generic;
+using osu.Framework.Allocation;
+using osu.Game.Rulesets.Mania.Edit.Blueprints;
+using osu.Game.Rulesets.Mania.UI;
+using osu.Game.Rulesets.UI;
+using osu.Game.Screens.Edit.Compose.Components;
+using osuTK;
+
+namespace osu.Game.Rulesets.Mania.Edit
+{
+    [Cached(Type = typeof(IManiaHitObjectComposer))]
+    public class ManiaHitObjectComposer : HitObjectComposer<ManiaHitObject>, IManiaHitObjectComposer
+    {
+        protected new ManiaEditRulesetContainer RulesetContainer { get; private set; }
+
+        public ManiaHitObjectComposer(Ruleset ruleset)
+            : base(ruleset)
+        {
+        }
+
+        /// <summary>
+        /// Retrieves the column that intersects a screen-space position.
+        /// </summary>
+        /// <param name="screenSpacePosition">The screen-space position.</param>
+        /// <returns>The column which intersects with <paramref name="screenSpacePosition"/>.</returns>
+        public Column ColumnAt(Vector2 screenSpacePosition) => RulesetContainer.GetColumnByPosition(screenSpacePosition);
+
+        private DependencyContainer dependencies;
+
+        protected override IReadOnlyDependencyContainer CreateChildDependencies(IReadOnlyDependencyContainer parent)
+            => dependencies = new DependencyContainer(base.CreateChildDependencies(parent));
+
+        public int TotalColumns => ((ManiaPlayfield)RulesetContainer.Playfield).TotalColumns;
+
+        protected override RulesetContainer<ManiaHitObject> CreateRulesetContainer(Ruleset ruleset, WorkingBeatmap beatmap)
+        {
+            RulesetContainer = new ManiaEditRulesetContainer(ruleset, beatmap);
+
+            // This is the earliest we can cache the scrolling info to ourselves, before masks are added to the hierarchy and inject it
+            dependencies.CacheAs(RulesetContainer.ScrollingInfo);
+
+            return RulesetContainer;
+        }
+
+        protected override IReadOnlyList<HitObjectCompositionTool> CompositionTools => new HitObjectCompositionTool[]
+        {
+            new NoteCompositionTool(),
+            new HoldNoteCompositionTool()
+        };
+
+        public override SelectionHandler CreateSelectionHandler() => new ManiaSelectionHandler();
+
+        public override SelectionBlueprint CreateBlueprintFor(DrawableHitObject hitObject)
+        {
+            switch (hitObject)
+            {
+                case DrawableNote note:
+                    return new NoteSelectionBlueprint(note);
+                case DrawableHoldNote holdNote:
+                    return new HoldNoteSelectionBlueprint(holdNote);
+            }
+
+            return base.CreateBlueprintFor(hitObject);
+        }
+    }
+}

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

@@ -0,0 +1,125 @@
+// 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.Input.Events;
+using osu.Framework.Timing;
+using osu.Game.Rulesets.Edit;
+using osu.Game.Rulesets.Mania.Edit.Blueprints;
+using osu.Game.Rulesets.Mania.Objects;
+using osu.Game.Rulesets.UI;
+using osu.Game.Rulesets.UI.Scrolling;
+using osu.Game.Screens.Edit.Compose.Components;
+using osuTK;
+
+namespace osu.Game.Rulesets.Mania.Edit
+{
+    public class ManiaSelectionHandler : SelectionHandler
+    {
+        [Resolved]
+        private IScrollingInfo scrollingInfo { get; set; }
+
+        [Resolved]
+        private IManiaHitObjectComposer composer { get; set; }
+
+        private IClock editorClock;
+
+        [BackgroundDependencyLoader]
+        private void load(IAdjustableClock clock)
+        {
+            editorClock = clock;
+        }
+
+        public override void HandleDrag(SelectionBlueprint blueprint, DragEvent dragEvent)
+        {
+            adjustOrigins((ManiaSelectionBlueprint)blueprint);
+            performDragMovement(dragEvent);
+            performColumnMovement(dragEvent);
+
+            base.HandleDrag(blueprint, dragEvent);
+        }
+
+        /// <summary>
+        /// Ensures that the position of hitobjects remains centred to the mouse position.
+        /// E.g. The hitobject position will change if the editor scrolls while a hitobject is dragged.
+        /// </summary>
+        /// <param name="reference">The <see cref="ManiaSelectionBlueprint"/> that received the drag event.</param>
+        private void adjustOrigins(ManiaSelectionBlueprint reference)
+        {
+            var referenceParent = (HitObjectContainer)reference.HitObject.Parent;
+
+            float offsetFromReferenceOrigin = reference.DragPosition.Y - reference.HitObject.OriginPosition.Y;
+            float targetPosition = referenceParent.ToLocalSpace(reference.ScreenSpaceDragPosition).Y - offsetFromReferenceOrigin;
+
+            // Flip the vertical coordinate space when scrolling downwards
+            if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
+                targetPosition = targetPosition - referenceParent.DrawHeight;
+
+            float movementDelta = targetPosition - reference.HitObject.Position.Y;
+
+            foreach (var b in SelectedBlueprints.OfType<ManiaSelectionBlueprint>())
+                b.HitObject.Y += movementDelta;
+        }
+
+        private void performDragMovement(DragEvent dragEvent)
+        {
+            foreach (var b in SelectedBlueprints)
+            {
+                var hitObject = b.HitObject;
+
+                var objectParent = (HitObjectContainer)hitObject.Parent;
+
+                // Using the hitobject position is required since AdjustPosition can be invoked multiple times per frame
+                // without the position having been updated by the parenting ScrollingHitObjectContainer
+                hitObject.Y += dragEvent.Delta.Y;
+
+                float targetPosition;
+
+                // If we're scrolling downwards, a position of 0 is actually further away from the hit target
+                // so we need to flip the vertical coordinate in the hitobject container's space
+                if (scrollingInfo.Direction.Value == ScrollingDirection.Down)
+                    targetPosition = -hitObject.Position.Y;
+                else
+                    targetPosition = hitObject.Position.Y;
+
+                objectParent.Remove(hitObject);
+
+                hitObject.HitObject.StartTime = scrollingInfo.Algorithm.TimeAt(targetPosition,
+                    editorClock.CurrentTime,
+                    scrollingInfo.TimeRange.Value,
+                    objectParent.DrawHeight);
+
+                objectParent.Add(hitObject);
+            }
+        }
+
+        private void performColumnMovement(DragEvent dragEvent)
+        {
+            var lastColumn = composer.ColumnAt(dragEvent.ScreenSpaceLastMousePosition);
+            var currentColumn = composer.ColumnAt(dragEvent.ScreenSpaceMousePosition);
+            if (lastColumn == null || currentColumn == null)
+                return;
+
+            int columnDelta = currentColumn.Index - lastColumn.Index;
+            if (columnDelta == 0)
+                return;
+
+            int minColumn = int.MaxValue;
+            int maxColumn = int.MinValue;
+
+            foreach (var obj in SelectedHitObjects.OfType<ManiaHitObject>())
+            {
+                if (obj.Column < minColumn)
+                    minColumn = obj.Column;
+                if (obj.Column > maxColumn)
+                    maxColumn = obj.Column;
+            }
+
+            columnDelta = MathHelper.Clamp(columnDelta, -minColumn, composer.TotalColumns - 1 - maxColumn);
+
+            foreach (var obj in SelectedHitObjects.OfType<ManiaHitObject>())
+                obj.Column += columnDelta;
+        }
+    }
+}

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

@@ -0,0 +1,18 @@
+// 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.Objects.Drawables;
+
+namespace osu.Game.Rulesets.Mania.Edit.Masks
+{
+    public abstract class ManiaSelectionBlueprint : SelectionBlueprint
+    {
+        protected ManiaSelectionBlueprint(DrawableHitObject hitObject)
+            : base(hitObject)
+        {
+            RelativeSizeAxes = Axes.None;
+        }
+    }
+}

osu.Game.Rulesets.Mania/Edit/NoteCompositionTool.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.Mania.Edit.Blueprints;
+using osu.Game.Rulesets.Mania.Objects;
+
+namespace osu.Game.Rulesets.Mania.Edit
+{
+    public class NoteCompositionTool : HitObjectCompositionTool
+    {
+        public NoteCompositionTool()
+            : base(nameof(Note))
+        {
+        }
+
+        public override PlacementBlueprint CreatePlacementBlueprint() => new NotePlacementBlueprint();
+    }
+}

osu.Game.Rulesets.Mania/Judgements/HoldNoteTailJudgement.cs

@@ -1,27 +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.Game.Rulesets.Scoring;
-
-namespace osu.Game.Rulesets.Mania.Judgements
-{
-    public class HoldNoteTailJudgement : ManiaJudgement
-    {
-        /// <summary>
-        /// Whether the hold note has been released too early and shouldn't give full score for the release.
-        /// </summary>
-        public bool HasBroken;
-
-        protected override int NumericResultFor(HitResult result)
-        {
-            switch (result)
-            {
-                default:
-                    return base.NumericResultFor(result);
-                case HitResult.Great:
-                case HitResult.Perfect:
-                    return base.NumericResultFor(HasBroken ? HitResult.Good : result);
-            }
-        }
-    }
-}