AudioSystem uses TryGet for ITransformComponent.

Co-authored-by: ike709 <ike709@github.com>

.github/CODEOWNERS

@@ -1,14 +1,7 @@
-# Lines starting with '#' are comments.
-# Each line is a file pattern followed by one or more owners.
+# Last match in file takes precedence.
 
-# These owners will be the default owners for everything in the repo.
-# * @defunkt
-* @Acruid @PJB3005 @Silvertorch5
+# Be they Fluent translations or Freemarker templates, I know them both!
+*.ftl @RemieRichards
 
-# Order is important. The last matching pattern has the most precedence.
-# So if a pull request only touches javascript files, only these owners
-# will be requested to review.
-# *.js    @octocat @github/js
-
-# You can also use email addresses if you prefer.
-# docs/*  docs@example.com
+# Ping for all PRs
+* @Acruid @PJB3005 @Silvertorch5

.github/workflows/build-test.yml

@@ -10,7 +10,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, windows-latest, macos-latest]
 
     runs-on: ${{ matrix.os }}
 

.github/workflows/codeql-analysis.yml

@@ -11,14 +11,14 @@
 #
 name: "CodeQL"
 
-on:
-  push:
-    branches: [ master ]
-  pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [ master ]
-  schedule:
-    - cron: '30 18 * * 6'
+#on:
+#  push:
+#    branches: [ master ]
+#  pull_request:
+#    # The branches below must be a subset of the branches above
+#    branches: [ master ]
+#  schedule:
+#    - cron: '30 18 * * 6'
 
 jobs:
   analyze:
@@ -38,12 +38,12 @@ jobs:
       uses: actions/checkout@v2
       with:
         submodules: true
-        
+
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
         dotnet-version: 5.0.100
-        
+
     - name: Build
       run: dotnet build
 

.github/workflows/test-content.yml

@@ -38,4 +38,4 @@ jobs:
     - name: Content.Tests
       run: dotnet test --no-build Content.Tests/Content.Tests.csproj -v n
     - name: Content.IntegrationTests
-      run: dotnet test --no-build Content.IntegrationTests/Content.IntegrationTests.csproj -v n
+      run: COMPlus_gcServer=1 dotnet test --no-build Content.IntegrationTests/Content.IntegrationTests.csproj -v n

.gitmodules

@@ -4,6 +4,18 @@
 [submodule "Lidgren.Network"]
 	path = Lidgren.Network/Lidgren.Network
 	url = https://github.com/space-wizards/lidgren-network-gen3.git
+[submodule "XamlX"]
+	path = XamlX
+	url = https://github.com/space-wizards/XamlX
 [submodule "Robust.LoaderApi"]
 	path = Robust.LoaderApi
 	url = https://github.com/space-wizards/Robust.LoaderApi.git
+[submodule "ManagedHttpListener"]
+	path = ManagedHttpListener
+	url = https://github.com/space-wizards/ManagedHttpListener.git
+[submodule "Linguini"]
+	path = Linguini
+	url = https://github.com/space-wizards/Linguini
+[submodule "cefglue"]
+	path = cefglue
+	url = https://gitlab.com/xiliumhq/chromiumembedded/cefglue/

Avalonia.Base/Avalonia.Base.csproj

@@ -0,0 +1,7 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net5.0</TargetFramework>
+    </PropertyGroup>
+
+</Project>

Avalonia.Base/README.md

@@ -0,0 +1,2 @@
+See `Robust.Client/UserInterface/XAML/RiderNotes.md` for why this project exists.
+We are not actually using Avalonia (yet).

MSBuild/Robust.Analyzers.targets

@@ -0,0 +1,5 @@
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="12.0">
+  <ItemGroup>
+    <ProjectReference Include="$(MSBuildThisFileDirectory)\..\Robust.Analyzers\Robust.Analyzers.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false"/>
+  </ItemGroup>
+</Project>

MSBuild/Robust.Engine.props

@@ -4,5 +4,6 @@
         <TargetFramework>net5.0</TargetFramework>
         <LangVersion>9</LangVersion>
         <Nullable>enable</Nullable>
+        <WarningsAsErrors>nullable</WarningsAsErrors>
     </PropertyGroup>
 </Project>

MSBuild/Robust.Engine.targets

@@ -1,2 +1,3 @@
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="12.0">
+  <Import Project="Robust.Analyzers.targets" />
 </Project>

MSBuild/XamlIL.targets

@@ -0,0 +1,65 @@
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="12.0">
+  <PropertyGroup>
+    <!-- Avoid MSBuild adding a None entry for XAML files because they'd show up TWICE in the project view. -->
+    <DefaultItemExcludes>**/*.xaml</DefaultItemExcludes>
+    <RobustUseExternalMSBuild>true</RobustUseExternalMSBuild>
+    <_RobustUseExternalMSBuild>$(RobustUseExternalMSBuild)</_RobustUseExternalMSBuild>
+    <_RobustUseExternalMSBuild Condition="'$(_RobustForceInternalMSBuild)' == 'true'">false</_RobustUseExternalMSBuild>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Update="**\*.xaml.cs">
+      <DependentUpon>%(Filename)</DependentUpon>
+    </Compile>
+    <EmbeddedResource Include="**\*.xaml"/>
+    <AdditionalFiles Include="**\*.xaml"/>
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="$(MSBuildThisFileDirectory)\..\Robust.Client.NameGenerator\Robust.Client.NameGenerator.csproj" OutputItemType="Analyzer" ReferenceOutputAssembly="false"/>
+    <ProjectReference Include="$(MSBuildThisFileDirectory)\..\Robust.Client.Injectors\Robust.Client.Injectors.csproj" ReferenceOutputAssembly="false"/>
+  </ItemGroup>
+
+  <UsingTask
+    Condition="'$(_RobustUseExternalMSBuild)' != 'true' And $(DesignTimeBuild) != true"
+    TaskName="CompileRobustXamlTask"
+    AssemblyFile="$(MSBuildThisFileDirectory)\..\Robust.Client.Injectors\bin\$(Configuration)\netstandard2.0\Robust.Client.Injectors.dll"/>
+  <Target
+    Name="CompileRobustXaml"
+    Condition="Exists('@(IntermediateAssembly)')"
+    AfterTargets="AfterCompile"
+    Inputs="@(IntermediateAssembly);@(ReferencePathWithRefAssemblies)"
+    Outputs="$(IntermediateOutputPath)XAML/doot">
+    <PropertyGroup>
+      <RobustXamlReferencesTemporaryFilePath Condition="'$(RobustXamlReferencesTemporaryFilePath)' == ''">$(IntermediateOutputPath)XAML/references</RobustXamlReferencesTemporaryFilePath>
+      <RobustXamlOriginalCopyFilePath Condition="'$(RobustXamlOriginalCopyFilePath)' == ''">$(IntermediateOutputPath)XAML/original.dll</RobustXamlOriginalCopyFilePath>
+    </PropertyGroup>
+    <WriteLinesToFile
+      Condition="'$(_RobustForceInternalMSBuild)' != 'true'"
+      File="$(RobustXamlReferencesTemporaryFilePath)"
+      Lines="@(ReferencePathWithRefAssemblies)"
+      Overwrite="true"/>
+
+    <!--
+    UpdateBuildIndicator is done so that we can use MSBuild Inputs and Outputs on the target
+    to avoid unecessary execution of this target
+    Saves compile time if e.g. ONLY Robust.Client changes (Content.Client doesn't have to re-xaml).
+    -->
+    <CompileRobustXamlTask
+      Condition="'$(_RobustUseExternalMSBuild)' != 'true'"
+      AssemblyFile="@(IntermediateAssembly)"
+      ReferencesFilePath="$(RobustXamlReferencesTemporaryFilePath)"
+      OriginalCopyPath="$(RobustXamlOriginalCopyFilePath)"
+      ProjectDirectory="$(MSBuildProjectDirectory)"
+      AssemblyOriginatorKeyFile="$(AssemblyOriginatorKeyFile)"
+      SignAssembly="$(SignAssembly)"
+      DelaySign="$(DelaySign)"
+      UpdateBuildIndicator="$(IntermediateOutputPath)XAML/doot"/>
+
+    <PropertyGroup>
+      <DOTNET_HOST_PATH Condition="'$(DOTNET_HOST_PATH)' == ''">dotnet</DOTNET_HOST_PATH>
+    </PropertyGroup>
+    <Exec
+      Condition="'$(_RobustUseExternalMSBuild)' == 'true'"
+      Command="&quot;$(DOTNET_HOST_PATH)&quot; msbuild /nodereuse:false $(MSBuildProjectFile) /t:CompileRobustXaml /p:_RobustForceInternalMSBuild=true /p:Configuration=$(Configuration) /p:RuntimeIdentifier=$(RuntimeIdentifier) /p:TargetFramework=$(TargetFramework) /p:BuildProjectReferences=false"/>
+  </Target>
+</Project>

OpenToolkit.GraphicsLibraryFramework/Enums/WindowHintBool.cs

@@ -129,5 +129,7 @@ namespace OpenToolkit.GraphicsLibraryFramework
         /// for controlling sRGB rendering and a created OpenGL ES context will always have sRGB rendering enabled.
         /// </summary>
         SrgbCapable = 0x0002100E,
+
+        ScaleToMonitor = 0x0002200C,
     }
 }

OpenToolkit.GraphicsLibraryFramework/GLFW.cs

@@ -5551,5 +5551,15 @@ namespace OpenToolkit.GraphicsLibraryFramework
         {
             return glfwGetX11Window(window);
         }
+
+        public static unsafe IntPtr GetX11Display(Window* window)
+        {
+            return glfwGetX11Display(window);
+        }
+
+        public static unsafe IntPtr GetWin32Window(Window* window)
+        {
+            return glfwGetWin32Window(window);
+        }
     }
 }

OpenToolkit.GraphicsLibraryFramework/GLFWNative.cs

@@ -17,17 +17,18 @@ namespace OpenToolkit.GraphicsLibraryFramework
             // On net472, we rely on Mono's DllMap for this. See the .dll.config file.
             NativeLibrary.SetDllImportResolver(typeof(GLFWNative).Assembly, (name, assembly, path) =>
             {
+                // Please keep in sync with what Robust.Shared/DllMapHelper.cs does.
                 if (name != "glfw3.dll")
                 {
                     return IntPtr.Zero;
                 }
 
-                if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+                if (OperatingSystem.IsLinux())
                 {
                     return NativeLibrary.Load("libglfw.so.3", assembly, path);
                 }
 
-                if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+                if (OperatingSystem.IsMacOS())
                 {
                     return NativeLibrary.Load("libglfw.3.dylib", assembly, path);
                 }
@@ -405,5 +406,11 @@ namespace OpenToolkit.GraphicsLibraryFramework
 
         [DllImport(LibraryName)]
         public static extern uint glfwGetX11Window(Window* window);
+
+        [DllImport(LibraryName)]
+        public static extern IntPtr glfwGetX11Display(Window* window);
+
+        [DllImport(LibraryName)]
+        public static extern IntPtr glfwGetWin32Window(Window* window);
     }
 }

OpenToolkit.GraphicsLibraryFramework/OpenToolkit.GraphicsLibraryFramework.csproj

@@ -14,12 +14,6 @@
     <PackageReference Condition="'$(TargetFramework)' == 'net472'" Include="System.Memory" Version="4.5.3" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Content Include="OpenToolkit.GraphicsLibraryFramework.dll.config">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </Content>
-  </ItemGroup>
-
   <ItemGroup>
     <ProjectReference Include="..\Robust.Shared\Robust.Shared.csproj" />
   </ItemGroup>

OpenToolkit.GraphicsLibraryFramework/OpenToolkit.GraphicsLibraryFramework.dll.config

@@ -1,5 +0,0 @@
-<configuration>
-    <!-- I actually have no idea whether this works on FreeBSD but it can't hurt to set it as such. -->
-    <dllmap os="linux,freebsd" dll="glfw3.dll" target="glfw.so.3" />
-    <dllmap os="osx" dll="glfw3.dll" target="glfw.3.dylib" />
-</configuration>

README.md

@@ -1,25 +1,16 @@
 ![Robust Toolbox](https://raw.githubusercontent.com/space-wizards/asset-dump/3dd3078e49e3a7e06709a6e0fc6e3223d8d44ca2/robust.png)
 
-[![Build status](https://ci.appveyor.com/api/projects/status/ygb7t8hsj3wt7pnm/branch/master?svg=true)](https://ci.appveyor.com/project/Silvertorch5/space-station-14/branch/master)
-[![Coverage](https://sonarcloud.io/api/project_badges/measure?project=ss14&metric=coverage)](https://sonarcloud.io/dashboard?id=ss14)
+Robust Toolbox is an engine primarily being developed for [Space Station 14](https://github.com/space-wizards/space-station-14), although we're working on making it usable for both [singleplayer](https://github.com/space-wizards/RobustToolboxTemplateSingleplayer) and [multiplayer](https://github.com/space-wizards/RobustToolboxTemplate) projects.
 
-Robust Toolbox is a client/server backend for [Space Station 14](https://github.com/space-wizards/space-station-14).
+Use the [content repo](https://github.com/space-wizards/space-station-14) for actual development, even if you're modifying the engine itself.
 
-### *This repository is the *engine* section of SS14. This is the base engine all SS14 servers will be built on. As such, it does not start on its own: it needs the [content repo](https://github.com/space-wizards/space-station-14). Use said repo for actual development, even if you're modifying the engine itself. Think of Robust Toolbox as BYOND in the context of Spacestation 13.*
+## Project Links
 
-## Getting in Touch
+[Website](https://spacestation14.io/) | [Discord](https://discord.gg/t2jac3p) | [Forum](https://forum.spacestation14.io/) | [Steam](https://store.steampowered.com/app/1255460/Space_Station_14/) | [Standalone Download](https://spacestation14.io/about/nightlies/)
 
-* Website: [spacestation14.io](https://spacestation14.io/)
-* Discord: [Invite Link](https://discord.gg/t2jac3p)
-* IRC: `irc.rizon.net#spacebus`
-* Code Analysis: [Sonar Cloud](https://sonarcloud.io/dashboard?id=ss14)
-* Automatic Content Builds: [builds.spacestation14.io](https://builds.spacestation14.io/jenkins/)
+## Documentation/Wiki
 
-The IRC is setup to relay back and forth to the Discord server so [IRC nerds](https://xkcd.com/1782/) will not be left out.
-
-## Documentation
-
-We have various technical documentation articles on the [HackMD Wiki](https://hackmd.io/@ss14/docs/%2F%40ss14%2Ftechnical-documentation-overview).
+The [HackMD Wiki](https://hackmd.io/@ss14/docs/wiki) has documentation on SS14s content, engine, game design and more. We also have lots of resources for new contributors to the project.
 
 ## Contributing
 
@@ -27,8 +18,8 @@ We are happy to accept contributions from anybody. Get in Discord or IRC if you
 
 ## Building
 
-**In practice, you usually don't build this repository directly.**
+This repository is the **engine** part of SS14. It's the base engine all SS14 servers will be built on. As such, it does not start on its own: it needs the [content repo](https://github.com/space-wizards/space-station-14). Think of Robust Toolbox as BYOND in the context of Spacestation 13.
 
 ## Legal Info
 
-See `legal.md` for licenses and copyright.
+See [legal.md](https://github.com/space-wizards/RobustToolbox/blob/master/legal.md) for licenses and copyright.

Resources/EngineCredits/Libraries.yml

@@ -23,6 +23,48 @@
     OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
+- name: Box2D
+  license: |
+    MIT License
+
+    Copyright (c) 2019 Erin Catto
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+
+- name: Bullet Physics SDK
+  license: |
+    The files in this repository are licensed under the zlib license, except for the files under 'Extras' and examples/ThirdPartyLibs.
+
+    Bullet Continuous Collision Detection and Physics Library
+    http://bulletphysics.org
+
+    This software is provided 'as-is', without any express or implied warranty.
+    In no event will the authors be held liable for any damages arising from the use of this software.
+    Permission is granted to anyone to use this software for any purpose,
+    including commercial applications, and to alter it and redistribute it freely,
+    subject to the following restrictions:
+
+    1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software.
+    If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
+    2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
+    3. This notice may not be removed or altered from any source distribution.
+
 - name: Castle Core
   license: |
     Copyright 2004-2016 Castle Project - http://www.castleproject.org/
@@ -317,6 +359,43 @@
     See the License for the specific language governing permissions and
     limitations under the License.
 
+- name: Farseer Physics Engine
+  license: |
+    Microsoft Permissive License (Ms-PL)
+
+    This license governs use of the accompanying software.
+    If you use the software, you accept this license.
+    If you do not accept the license, do not use the software.
+
+    1. Definitions
+    The terms "reproduce," "reproduction," "derivative works," and "distribution" have the same meaning here as under U.S. copyright law.
+    A "contribution" is the original software, or any additions or changes to the software.
+    A "contributor" is any person that distributes its contribution under this license.
+    "Licensed patents" are a contributor's patent claims that read directly on its contribution.
+
+    2. Grant of Rights
+    (A) Copyright Grant- Subject to the terms of this license, including the license conditions and limitations in section 3,
+    each contributor grants you a non-exclusive, worldwide, royalty-free copyright license to reproduce its contribution,
+    prepare derivative works of its contribution, and distribute its contribution or any derivative works that you create.
+    (B) Patent Grant- Subject to the terms of this license, including the license conditions and limitations in section 3,
+    each contributor grants you a non-exclusive, worldwide, royalty-free license under its licensed patents to
+    make, have made, use, sell, offer for sale, import, and/or otherwise dispose of its contribution in the software or
+    derivative works of the contribution in the software.
+
+    3. Conditions and Limitations
+    (A) No Trademark License- This license does not grant you rights to use any contributors' name, logo, or trademarks.
+    (B) If you bring a patent claim against any contributor over patents that you claim are infringed by the software,
+    your patent license from such contributor to the software ends automatically.
+    (C) If you distribute any portion of the software, you must retain all copyright, patent, trademark,
+    and attribution notices that are present in the software.
+    (D) If you distribute any portion of the software in source code form, you may do so only under this license by
+    including a complete copy of this license with your distribution. If you distribute any portion of the software in
+    compiled or object code form, you may only do so under a license that complies with this license.
+    (E) The software is licensed "as-is." You bear the risk of using it. The contributors give no express warranties,
+    guarantees or conditions. You may have additional consumer rights under your local laws which this license cannot change.
+    To the extent permitted under your local laws, the contributors exclude the implied warranties of
+    merchantability, fitness for a particular purpose and non-infringement.
+
 - name: Mono.Cecil
   license: |
     Copyright (c) 2008 - 2015 Jb Evain
@@ -574,29 +653,22 @@
     OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     SOFTWARE.
 
-- name: NGetText
+- name: Fluent.Net
   license: |
-    The MIT License (MIT)
+    blushingpenguin and Contributors
 
-    Copyright (c) 2012 Vitaly Zilnik
+    All rights reserved.
 
-    Permission is hereby granted, free of charge, to any person obtaining a copy
-    of this software and associated documentation files (the "Software"), to deal
-    in the Software without restriction, including without limitation the rights
-    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-    copies of the Software, and to permit persons to whom the Software is
-    furnished to do so, subject to the following conditions:
+    Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+    this file except in compliance with the License. You may obtain a copy of the
+    License at
 
-    The above copyright notice and this permission notice shall be included in all
-    copies or substantial portions of the Software.
+        http://www.apache.org/licenses/LICENSE-2.0
 
-    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-    SOFTWARE.
+    Unless required by applicable law or agreed to in writing, software distributed
+    under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+    CONDITIONS OF ANY KIND, either express or implied. See the License for the
+    specific language governing permissions and limitations under the License.
 
 - name: NetSerializer
   license: |

Resources/Locale/en-US/custom-controls.ftl

@@ -0,0 +1,11 @@
+## EntitySpawnWindow
+
+entity-spawn-window-title = Entity Spawn Panel
+entity-spawn-window-search-bar-placeholder = search
+entity-spawn-window-clear-button = Clear
+entity-spawn-window-erase-button-text = Erase Mode
+entity-spawn-window-override-menu-tooltip = Override placement
+
+## Console
+
+console-line-edit-placeholder = Command Here

Resources/Locale/en-US/input.ftl

@@ -0,0 +1,54 @@
+input-key-Escape = Escape
+input-key-Control = Control
+input-key-Shift = Shift
+input-key-Alt = Alt
+input-key-Menu = Menu
+input-key-F1 = F1
+input-key-F2 = F2
+input-key-F3 = F3
+input-key-F4 = F4
+input-key-F5 = F5
+input-key-F6 = F6
+input-key-F7 = F7
+input-key-F8 = F8
+input-key-F9 = F9
+input-key-F10 = F10
+input-key-F11 = F11
+input-key-F12 = F12
+input-key-F13 = F13
+input-key-F14 = F14
+input-key-F15 = F15
+input-key-Pause = Pause
+input-key-Left = Left
+input-key-Up = Up
+input-key-Down = Down
+input-key-Right = Right
+input-key-Space = Space
+input-key-Return = Return
+input-key-NumpadEnter = Num Enter
+input-key-BackSpace = Backspace
+input-key-Tab = Tab
+input-key-PageUp = Page Up
+input-key-PageDown = Page Down
+input-key-End = End
+input-key-Home = Home
+input-key-Insert = Insert
+input-key-Delete = Delete
+input-key-MouseLeft = Mouse Left
+input-key-MouseRight = Mouse Right
+input-key-MouseMiddle = Mouse Middle
+input-key-MouseButton4 = Mouse 4
+input-key-MouseButton5 = Mouse 5
+input-key-MouseButton6 = Mouse 6
+input-key-MouseButton7 = Mouse 7
+input-key-MouseButton8 = Mouse 8
+input-key-MouseButton9 = Mouse 9
+
+input-key-LSystem-win = Left Win
+input-key-RSystem-win = Right Win
+input-key-LSystem-mac = Left Cmd
+input-key-RSystem-mac = Right Cmd
+input-key-LSystem-linux = Left Meta
+input-key-RSystem-linux = Right Meta
+
+input-key-unknown = <unknown key>

Resources/Locale/en-US/ss14window.ftl

@@ -0,0 +1 @@
+ss14window-placeholder-title = Exemplary Window Title Here

Resources/Locale/en-US/tab-container.ftl

@@ -0,0 +1 @@
+tab-container-not-tab-title-provided = No title

Resources/Locale/en-US/view-variables.ftl

@@ -0,0 +1,11 @@
+## ViewVariablesInstanceEntity
+
+view-variable-instance-entity-server-components-add-component-button-placeholder = Add Component
+view-variable-instance-entity-client-variables-tab-title = Client Variables
+view-variable-instance-entity-client-components-tab-title = Client Components
+view-variable-instance-entity-server-variables-tab-title = Server Variables
+view-variable-instance-entity-server-components-tab-title = Server Components
+view-variable-instance-entity-client-components-search-bar-placeholder = Search
+view-variable-instance-entity-server-components-search-bar-placeholder = Search
+view-variable-instance-entity-add-window-server-components = Add Component [S]
+view-variable-instance-entity-add-window-client-components = Add Component [C]

Resources/Shaders/Internal/fov-lighting.swsl

@@ -28,5 +28,10 @@ void fragment()
 
     highp float occlusion = ChebyshevUpperBound(occlDist, ourDist);
 
+    if (occlusion >= 1.0)
+    {
+        discard;
+    }
+
     COLOR = vec4(0.0, 0.0, 0.0, 1.0 - occlusion);
 }

Resources/Shaders/Internal/light-blur.swsl

@@ -0,0 +1,41 @@
+preset raw;
+
+uniform highp vec2 direction;
+uniform highp vec2 size;
+uniform highp float radius;
+
+varying highp vec2 pos;
+varying highp vec4 blurPos1;
+varying highp vec4 blurPos2;
+
+
+void vertex()
+{
+    highp float aspect = size.y / size.x;
+    highp float horRadius = aspect * radius;
+
+    highp vec2 offset = vec2(horRadius, radius) * direction;
+
+    VERTEX = apply_mvp(VERTEX);
+
+    pos = (VERTEX + vec2(1.0)) / 2.0;
+
+    blurPos1.xy = pos + offset;
+    blurPos1.zw = pos - offset;
+    blurPos2.xy = pos + offset * 2.0;
+    blurPos2.zw = pos - offset * 2.0;
+}
+
+
+void fragment()
+{
+    // Very simple gaussian blur.
+    highp vec4 sum = zTexture(pos) * 0.375;
+
+    sum += zTexture(blurPos1.xy) * 0.25;
+    sum += zTexture(blurPos1.zw) * 0.25;
+    sum += zTexture(blurPos2.xy) * 0.0625;
+    sum += zTexture(blurPos2.zw) * 0.0625;
+
+    COLOR = sum;
+}

Resources/Shaders/Internal/light-soft.swsl

@@ -1,5 +1,11 @@
 #include "/Shaders/Internal/light_shared.swsl"
 
+highp vec4 calcGaussianWeights(highp float sigma, highp vec4 offset)
+{
+    highp vec4 eExp = offset * offset / (2.0 * sigma * sigma);
+    return exp(-eExp) / (sigma * sqrt(2.0 * PI));
+}
+
 highp float createOcclusion(highp vec2 diff)
 {
     // Calculate vector perpendicular to light vector.
@@ -8,23 +14,57 @@ highp float createOcclusion(highp vec2 diff)
 
     highp float ourDist = length(diff);
 
-    highp vec2 occlDist = occludeDepth(diff, shadowMap, lightIndex);
+    // Sample 7 points on a line perpendicular to the light source.
+    // Depending on the closest point, we change the gaussian weights down below
+    // to change the "narrowness" of the samples.
+    perpendicular *= lightSoftness * 1.5;
+
+    // Get all the samples we need.
+    highp vec2 sample1 = occludeDepth(diff, shadowMap, lightIndex);
+    highp vec2 sample2 = occludeDepth(diff + perpendicular, shadowMap, lightIndex);
+    highp vec2 sample3 = occludeDepth(diff - perpendicular, shadowMap, lightIndex);
+    highp vec2 sample4 = occludeDepth(diff + perpendicular * 2.0, shadowMap, lightIndex);
+    highp vec2 sample5 = occludeDepth(diff - perpendicular * 2.0, shadowMap, lightIndex);
+    highp vec2 sample6 = occludeDepth(diff + perpendicular * 3.0, shadowMap, lightIndex);
+    highp vec2 sample7 = occludeDepth(diff - perpendicular * 3.0, shadowMap, lightIndex);
+
+    highp float mindist =
+        min(sample1.x,
+        min(sample2.x,
+        min(sample3.x,
+        min(sample4.x,
+        min(sample5.x,
+        min(sample6.x,
+            sample7.x))))));
+
+    mindist = max(0.001, mindist);
 
     // Change soft shadow size based on distance from primary occluder.
-    highp float distRatio = (ourDist - occlDist.x) / occlDist.x / 2.0;
+    highp float distRatio = (ourDist - mindist);
 
-    perpendicular *= distRatio;
+    // Sigma can never be zero so make sure to clamp.
+    // TODO: Scaling the dist ratio here in a more sane way might make shadows look better buuuut I'm lazy.
+    // Shadows look pretty nice already.
+    highp float sigma = max(0.001, distRatio * 0.75);
+    highp vec4 weights = calcGaussianWeights(sigma, vec4(0.0, 1.0, 2.0, 3.0));
 
-    // Totally not hacky PCF on top of VSM.
-    highp float occlusion = smoothstep(0.1, 1.0, ChebyshevUpperBound(occlDist, ourDist));
+    // Calculation of gaussian weights here is broken because it doesn't add up to 1.
+    // Fixing this is hard and if I had to guess too expensive for GPU shaders.
+    // So instead we add up the total weights and scale the result with that,
+    // so that we still end up with 0-1.
+    highp float totalWeigths = weights.x + weights.y * 2.0 + weights.z * 2.0 + weights.w * 2.0;
 
-    occlusion += shadowContrib(diff + perpendicular);
-    occlusion += shadowContrib(diff - perpendicular);
-    occlusion += shadowContrib(diff + perpendicular * 2.0);
-    occlusion += shadowContrib(diff - perpendicular * 2.0);
-    occlusion += shadowContrib(diff + perpendicular * 3.0);
-    occlusion += shadowContrib(diff - perpendicular * 3.0);
+    highp float occlusion = 0.0;
 
-    return occlusion / 7.0;
+    // Calculate actual occlusion with new weights.
+    occlusion += ChebyshevUpperBound(sample1, ourDist) * weights.x;
+    occlusion += ChebyshevUpperBound(sample2, ourDist) * weights.y;
+    occlusion += ChebyshevUpperBound(sample3, ourDist) * weights.y;
+    occlusion += ChebyshevUpperBound(sample4, ourDist) * weights.z;
+    occlusion += ChebyshevUpperBound(sample5, ourDist) * weights.z;
+    occlusion += ChebyshevUpperBound(sample6, ourDist) * weights.w;
+    occlusion += ChebyshevUpperBound(sample7, ourDist) * weights.w;
+
+    return occlusion / totalWeigths;
 }
 

Resources/Shaders/Internal/light_shared.swsl

@@ -13,6 +13,7 @@ uniform highp vec4 lightColor;
 uniform highp vec2 lightCenter;
 uniform highp float lightRange;
 uniform highp float lightPower;
+uniform highp float lightSoftness;
 uniform highp float lightIndex;
 uniform sampler2D shadowMap;
 

Resources/Textures/debugRotation.rsi/meta.json

@@ -0,0 +1,17 @@
+{
+    "version": 1,
+    "size": {
+        "x": 32,
+        "y": 32
+    },
+    "states": [{
+            "name": "direction1",
+            "directions": 1,
+            "delays": [[1.0]]
+        }, {
+            "name": "direction4",
+            "directions": 4,
+            "delays": [[1.0], [1.0], [1.0], [1.0]]
+        }
+    ]
+}

Robust.Analyzers/Diagnostics.cs

@@ -0,0 +1,10 @@
+using Microsoft.CodeAnalysis;
+
+namespace Robust.Generators
+{
+    public static class Diagnostics
+    {
+        public static SuppressionDescriptor MeansImplicitAssignment =>
+            new SuppressionDescriptor("RADC1000", "CS0649", "Marked as implicitly assigned.");
+    }
+}

Robust.Analyzers/ExplicitInterfaceAnalyzer.cs

@@ -0,0 +1,92 @@
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CodeActions;
+using Microsoft.CodeAnalysis.CodeFixes;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Diagnostics;
+using Document = Microsoft.CodeAnalysis.Document;
+
+namespace Robust.Analyzers
+{
+    [DiagnosticAnalyzer(LanguageNames.CSharp)]
+    public class ExplicitInterfaceAnalyzer : DiagnosticAnalyzer
+    {
+        public readonly SyntaxKind[] ExcludedModifiers =
+        {
+            SyntaxKind.VirtualKeyword,
+            SyntaxKind.AbstractKeyword,
+            SyntaxKind.OverrideKeyword
+        };
+
+        public const string DiagnosticId = "RA0000";
+
+        private const string Title = "No explicit interface specified";
+        private const string MessageFormat = "No explicit interface specified";
+        private const string Description = "Make sure to specify the interface in your method-declaration.";
+        private const string Category = "Usage";
+
+        [SuppressMessage("ReSharper", "RS2008")] private static readonly DiagnosticDescriptor Rule = new DiagnosticDescriptor(DiagnosticId, Title, MessageFormat, Category, DiagnosticSeverity.Warning, isEnabledByDefault: true, description: Description);
+
+        private const string RequiresExplicitImplementationAttributeMetadataName =
+            "Robust.Shared.Analyzers.RequiresExplicitImplementationAttribute";
+
+        public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => ImmutableArray.Create(Rule);
+
+        public override void Initialize(AnalysisContext context)
+        {
+            context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.Analyze | GeneratedCodeAnalysisFlags.None);
+            context.EnableConcurrentExecution();
+            context.RegisterSyntaxNodeAction(AnalyzeNode, SyntaxKind.MethodDeclaration);
+            context.RegisterSyntaxNodeAction(AnalyzeNode, SyntaxKind.PropertyDeclaration);
+        }
+
+        private void AnalyzeNode(SyntaxNodeAnalysisContext context)
+        {
+            ISymbol symbol;
+            Location location;
+            switch (context.Node)
+            {
+                //we already have a explicit interface specified, no need to check further
+                case MethodDeclarationSyntax methodDecl when methodDecl.ExplicitInterfaceSpecifier != null || methodDecl.Modifiers.Any(m => ExcludedModifiers.Contains(m.Kind())):
+                    return;
+                case PropertyDeclarationSyntax propertyDecl when propertyDecl.ExplicitInterfaceSpecifier != null || propertyDecl.Modifiers.Any(m => ExcludedModifiers.Contains(m.Kind())):
+                    return;
+
+                case MethodDeclarationSyntax methodDecl:
+                    symbol = context.SemanticModel.GetDeclaredSymbol(methodDecl);
+                    location = methodDecl.Identifier.GetLocation();
+                    break;
+                case PropertyDeclarationSyntax propertyDecl:
+                    symbol = context.SemanticModel.GetDeclaredSymbol(propertyDecl);
+                    location = propertyDecl.Identifier.GetLocation();
+                    break;
+
+                default:
+                    return;
+            }
+
+            var attrSymbol = context.Compilation.GetTypeByMetadataName(RequiresExplicitImplementationAttributeMetadataName);
+
+            var isInterfaceMember = symbol?.ContainingType.AllInterfaces.Any(
+                i =>
+                    i.GetMembers().Any(m => SymbolEqualityComparer.Default.Equals(symbol, symbol.ContainingType.FindImplementationForInterfaceMember(m)))
+                    && i.GetAttributes().Any(a => SymbolEqualityComparer.Default.Equals(a.AttributeClass, attrSymbol))
+            ) ?? false;
+
+            if (isInterfaceMember)
+            {
+                //we do not have an explicit interface specified. bad!
+                var diagnostic = Diagnostic.Create(
+                    Rule,
+                    location);
+                context.ReportDiagnostic(diagnostic);
+            }
+        }
+    }
+}

Robust.Analyzers/FriendAnalyzer.cs

@@ -0,0 +1,107 @@
+using System.Collections.Immutable;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Diagnostics;
+
+namespace Robust.Analyzers
+{
+    [DiagnosticAnalyzer(LanguageNames.CSharp)]
+    public class FriendAnalyzer : DiagnosticAnalyzer
+    {
+        const string FriendAttribute = "Robust.Shared.Analyzers.FriendAttribute";
+
+        public const string DiagnosticId = "RA0002";
+
+        private const string Title = "Tried to access friend-only member";
+        private const string MessageFormat = "Tried to access member \"{0}\" in class \"{1}\" which can only be accessed by friend classes";
+        private const string Description = "Make sure to specify the accessing class in the friends attribute.";
+        private const string Category = "Usage";
+
+        [SuppressMessage("ReSharper", "RS2008")]
+        private static readonly DiagnosticDescriptor Rule = new (DiagnosticId, Title, MessageFormat, Category, DiagnosticSeverity.Error, true, Description);
+
+        public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => ImmutableArray.Create(Rule);
+
+        public override void Initialize(AnalysisContext context)
+        {
+            context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.Analyze | GeneratedCodeAnalysisFlags.ReportDiagnostics);
+            context.EnableConcurrentExecution();
+            context.RegisterSyntaxNodeAction(CheckFriendship, SyntaxKind.SimpleMemberAccessExpression);
+        }
+
+        private void CheckFriendship(SyntaxNodeAnalysisContext context)
+        {
+            if (context.Node is not MemberAccessExpressionSyntax memberAccess)
+                return;
+
+            // We only do something if our parent is one of a few types.
+            switch (context.Node.Parent)
+            {
+                // If we're being assigned...
+                case AssignmentExpressionSyntax assignParent:
+                {
+                    if (assignParent.Left != memberAccess)
+                        return;
+                    break;
+                }
+
+                // If we're being invoked...
+                case InvocationExpressionSyntax:
+                    break;
+
+                // Otherwise, do nothing.
+                default:
+                    return;
+            }
+
+            // Get the friend attribute
+            var friendAttr = context.Compilation.GetTypeByMetadataName(FriendAttribute);
+
+            // Get the type that is containing this expression, or, the class where this is happening.
+            if (context.ContainingSymbol?.ContainingType is not { } containingType)
+                return;
+
+            // We check all of our children and get only the identifiers.
+            foreach (var identifier in memberAccess.ChildNodes().Select(node => node as IdentifierNameSyntax))
+            {
+                if (identifier == null) continue;
+
+                // Get the type info of the identifier, so we can check the attributes...
+                if (context.SemanticModel.GetTypeInfo(identifier).ConvertedType is not { } type)
+                    continue;
+
+                // Same-type access is always fine.
+                if (SymbolEqualityComparer.Default.Equals(type, containingType))
+                    continue;
+
+                // Finally, get all attributes of the type, to check if we have any friend classes.
+                foreach (var attribute in type.GetAttributes())
+                {
+                    // If the attribute isn't the friend attribute, continue.
+                    if (!SymbolEqualityComparer.Default.Equals(attribute.AttributeClass, friendAttr))
+                        continue;
+
+                    // Check all types allowed in the friend attribute. (We assume there's only one constructor arg.)
+                    foreach (var constant in attribute.ConstructorArguments[0].Values)
+                    {
+                        // Check if the value is a type...
+                        if (constant.Value is not INamedTypeSymbol t)
+                            continue;
+
+                        // If we find that the containing class is specified in the attribute, return! All is good.
+                        if (SymbolEqualityComparer.Default.Equals(containingType, t))
+                            return;
+                    }
+
+                    // Not in a friend class! Report an error.
+                    context.ReportDiagnostic(
+                        Diagnostic.Create(Rule, context.Node.GetLocation(),
+                            $"{context.Node.ToString().Split('.').LastOrDefault()}", $"{type.Name}"));
+                }
+            }
+        }
+    }
+}

Robust.Analyzers/MeansImplicitAssigmentSuppressor.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Immutable;
+using System.Linq;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.Diagnostics;
+using Robust.Generators;
+
+namespace Robust.Analyzers
+{
+    [DiagnosticAnalyzer(LanguageNames.CSharp)]
+    public class MeansImplicitAssigmentSuppressor : DiagnosticSuppressor
+    {
+        const string MeansImplicitAssignmentAttribute = "Robust.Shared.MeansImplicitAssignmentAttribute";
+
+        public override void ReportSuppressions(SuppressionAnalysisContext context)
+        {
+            var implAttr = context.Compilation.GetTypeByMetadataName(MeansImplicitAssignmentAttribute);
+            foreach (var reportedDiagnostic in context.ReportedDiagnostics)
+            {
+                if(reportedDiagnostic.Id != Diagnostics.MeansImplicitAssignment.SuppressedDiagnosticId) continue;
+
+                var node = reportedDiagnostic.Location.SourceTree?.GetRoot(context.CancellationToken).FindNode(reportedDiagnostic.Location.SourceSpan);
+                if (node == null) continue;
+
+                var symbol = context.GetSemanticModel(reportedDiagnostic.Location.SourceTree).GetDeclaredSymbol(node);
+
+                if (symbol == null || !symbol.GetAttributes().Any(a =>
+                    a.AttributeClass?.GetAttributes().Any(attr =>
+                        SymbolEqualityComparer.Default.Equals(attr.AttributeClass, implAttr)) == true))
+                {
+                    continue;
+                }
+
+                context.ReportSuppression(Suppression.Create(
+                    Diagnostics.MeansImplicitAssignment,
+                    reportedDiagnostic));
+            }
+        }
+
+        public override ImmutableArray<SuppressionDescriptor> SupportedSuppressions => ImmutableArray.Create(Diagnostics.MeansImplicitAssignment);
+    }
+}

Robust.Analyzers/Robust.Analyzers.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <LangVersion>9</LangVersion>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.8.0" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.2" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.Common" Version="3.8.0" />
+  </ItemGroup>
+
+</Project>

Robust.Analyzers/SerializableAnalyzer.cs

@@ -0,0 +1,150 @@
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CodeActions;
+using Microsoft.CodeAnalysis.CodeFixes;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Diagnostics;
+
+namespace Robust.Analyzers
+{
+    [DiagnosticAnalyzer(LanguageNames.CSharp)]
+    public class SerializableAnalyzer : DiagnosticAnalyzer
+    {
+        // Metadata of the analyzer
+        public const string DiagnosticId = "RA0001";
+
+        // You could use LocalizedString but it's a little more complicated for this sample
+        private const string Title = "Class not marked as (Net)Serializable";
+        private const string MessageFormat = "Class not marked as (Net)Serializable";
+        private const string Description = "The class should be marked as (Net)Serializable.";
+        private const string Category = "Usage";
+
+        private const string RequiresSerializableAttributeMetadataName = "Robust.Shared.Analyzers.RequiresSerializableAttribute";
+        private const string SerializableAttributeMetadataName = "System.SerializableAttribute";
+        private const string NetSerializableAttributeMetadataName = "Robust.Shared.Serialization.NetSerializableAttribute";
+
+        [SuppressMessage("ReSharper", "RS2008")] private static readonly DiagnosticDescriptor Rule = new DiagnosticDescriptor(DiagnosticId, Title, MessageFormat, Category, DiagnosticSeverity.Warning, isEnabledByDefault: true, description: Description);
+
+        public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => ImmutableArray.Create(Rule);
+
+        public override void Initialize(AnalysisContext context)
+        {
+            context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.Analyze | GeneratedCodeAnalysisFlags.None);
+            context.EnableConcurrentExecution();
+            context.RegisterSyntaxNodeAction(AnalyzeNode, SyntaxKind.ClassDeclaration);
+        }
+
+        private bool Marked(INamedTypeSymbol namedTypeSymbol, INamedTypeSymbol attrSymbol)
+        {
+            if (namedTypeSymbol == null) return false;
+            if (namedTypeSymbol.GetAttributes()
+                .Any(a => SymbolEqualityComparer.Default.Equals(a.AttributeClass, attrSymbol))) return true;
+            return Marked(namedTypeSymbol.BaseType, attrSymbol);
+        }
+
+        private void AnalyzeNode(SyntaxNodeAnalysisContext context)
+        {
+            var attrSymbol = context.Compilation.GetTypeByMetadataName(RequiresSerializableAttributeMetadataName);
+            var classDecl = (ClassDeclarationSyntax) context.Node;
+            var classSymbol = context.SemanticModel.GetDeclaredSymbol(classDecl);
+            if (classSymbol == null) return;
+
+            if (Marked(classSymbol, attrSymbol))
+            {
+                var attributes = classSymbol.GetAttributes();
+                var serAttr = context.Compilation.GetTypeByMetadataName(SerializableAttributeMetadataName);
+                var netSerAttr = context.Compilation.GetTypeByMetadataName(NetSerializableAttributeMetadataName);
+
+                var hasSerAttr = attributes.Any(a => SymbolEqualityComparer.Default.Equals(a.AttributeClass, serAttr));
+                var hasNetSerAttr =
+                    attributes.Any(a => SymbolEqualityComparer.Default.Equals(a.AttributeClass, netSerAttr));
+
+                if (!hasSerAttr || !hasNetSerAttr)
+                {
+                    var requiredAttributes = new List<string>();
+                    if(!hasSerAttr) requiredAttributes.Add(SerializableAttributeMetadataName);
+                    if(!hasNetSerAttr) requiredAttributes.Add(NetSerializableAttributeMetadataName);
+
+                    context.ReportDiagnostic(
+                        Diagnostic.Create(
+                            Rule,
+                            classDecl.Identifier.GetLocation(),
+                            ImmutableDictionary.CreateRange(new Dictionary<string, string>()
+                            {
+                                {
+                                    "requiredAttributes", string.Join(",", requiredAttributes)
+                                }
+                            })));
+                }
+            }
+        }
+    }
+
+    [ExportCodeFixProvider(LanguageNames.CSharp)]
+    public class SerializableCodeFixProvider : CodeFixProvider
+    {
+        private const string Title = "Annotate class as (Net)Serializable.";
+
+        public override async Task RegisterCodeFixesAsync(CodeFixContext context)
+        {
+            var root = await context.Document.GetSyntaxRootAsync(context.CancellationToken);
+
+            foreach (var diagnostic in context.Diagnostics)
+            {
+                var span = diagnostic.Location.SourceSpan;
+                var classDecl = root.FindToken(span.Start).Parent.AncestorsAndSelf().OfType<ClassDeclarationSyntax>().First();
+
+                if(!diagnostic.Properties.TryGetValue("requiredAttributes", out var requiredAttributes)) return;
+
+                context.RegisterCodeFix(
+                    CodeAction.Create(
+                        Title,
+                        c => FixAsync(context.Document, classDecl, requiredAttributes, c),
+                        Title),
+                    diagnostic);
+            }
+        }
+
+        private async Task<Document> FixAsync(Document document, ClassDeclarationSyntax classDecl,
+            string requiredAttributes, CancellationToken cancellationToken)
+        {
+            var attributes = new List<AttributeSyntax>();
+            var namespaces = new List<string>();
+            foreach (var attribute in requiredAttributes.Split(','))
+            {
+                var tempSplit = attribute.Split('.');
+                namespaces.Add(string.Join(".",tempSplit.Take(tempSplit.Length-1)));
+                var @class = tempSplit.Last();
+                @class = @class.Substring(0, @class.Length - 9); //cut out "Attribute" at the end
+                attributes.Add(SyntaxFactory.Attribute(SyntaxFactory.ParseName(@class)));
+            }
+
+            var newClassDecl =
+                classDecl.AddAttributeLists(SyntaxFactory.AttributeList(SyntaxFactory.SeparatedList(attributes)));
+
+            var root = (CompilationUnitSyntax) await document.GetSyntaxRootAsync(cancellationToken);
+            root = root.ReplaceNode(classDecl, newClassDecl);
+
+            foreach (var ns in namespaces)
+            {
+                if(root.Usings.Any(u => u.Name.ToString() == ns)) continue;
+                root = root.AddUsings(SyntaxFactory.UsingDirective(SyntaxFactory.ParseName(ns)));
+            }
+            return document.WithSyntaxRoot(root);
+        }
+
+        public sealed override ImmutableArray<string> FixableDiagnosticIds => ImmutableArray.Create(SerializableAnalyzer.DiagnosticId);
+
+        public override FixAllProvider GetFixAllProvider()
+        {
+            return WellKnownFixAllProviders.BatchFixer;
+        }
+
+    }
+}

Robust.Benchmarks/NumericsHelpers/AddBenchmark.cs

@@ -0,0 +1,28 @@
+using BenchmarkDotNet.Attributes;
+
+namespace Robust.Benchmarks.NumericsHelpers
+{
+    public class AddBenchmark
+    {
+        [Params(32, 128)]
+        public int N { get; set; }
+
+        private float[] _inputA = default!;
+        private float[] _inputB = default!;
+        private float[] _output = default!;
+
+        [GlobalSetup]
+        public void Setup()
+        {
+            _inputA = new float[N];
+            _inputB = new float[N];
+            _output = new float[N];
+        }
+
+        [Benchmark]
+        public void Bench()
+        {
+            Shared.Maths.NumericsHelpers.Add(_inputA, _inputB, _output);
+        }
+    }
+}

Robust.Benchmarks/Program.cs

@@ -0,0 +1,14 @@
+using BenchmarkDotNet.Running;
+
+namespace Robust.Benchmarks
+{
+    internal class Program
+    {
+        // --allCategories=ctg1,ctg2
+        // --anyCategories=ctg1,ctg2
+        public static void Main(string[] args)
+        {
+            BenchmarkSwitcher.FromAssembly(typeof(Program).Assembly).Run(args);
+        }
+    }
+}

Robust.Benchmarks/Robust.Benchmarks.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+    <Import Project="..\MSBuild\Robust.Properties.targets" />
+    <Import Project="..\MSBuild\Robust.Engine.props" />
+    <PropertyGroup>
+        <IsPackable>false</IsPackable>
+        <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
+        <OutputPath>../bin/Benchmarks</OutputPath>
+        <OutputType>Exe</OutputType>
+    </PropertyGroup>
+    <ItemGroup>
+      <ProjectReference Include="..\Robust.Server\Robust.Server.csproj" />
+      <ProjectReference Include="..\Robust.Shared\Robust.Shared.csproj" />
+    </ItemGroup>
+    <ItemGroup>
+      <PackageReference Include="BenchmarkDotNet" Version="0.12.1" />
+    </ItemGroup>
+    <Import Project="..\MSBuild\Robust.Engine.targets" />
+</Project>

Robust.Benchmarks/Serialization/BenchmarkIntSerializer.cs

@@ -0,0 +1,40 @@
+using System.Globalization;
+using Robust.Shared.IoC;
+using Robust.Shared.Serialization.Manager;
+using Robust.Shared.Serialization.Manager.Result;
+using Robust.Shared.Serialization.Markdown;
+using Robust.Shared.Serialization.Markdown.Validation;
+using Robust.Shared.Serialization.Markdown.Value;
+using Robust.Shared.Serialization.TypeSerializers.Interfaces;
+
+namespace Robust.Benchmarks.Serialization
+{
+    public class BenchmarkIntSerializer : ITypeSerializer<int, ValueDataNode>
+    {
+        public ValidationNode Validate(ISerializationManager serializationManager, ValueDataNode node,
+            IDependencyCollection dependencies, ISerializationContext? context = null)
+        {
+            return int.TryParse(node.Value, out _)
+                ? new ValidatedValueNode(node)
+                : new ErrorNode(node, $"Failed parsing int value: {node.Value}");
+        }
+
+        public DeserializationResult Read(ISerializationManager serializationManager, ValueDataNode node,
+            IDependencyCollection dependencies, bool skipHook, ISerializationContext? context = null)
+        {
+            return new DeserializedValue<int>(int.Parse(node.Value, CultureInfo.InvariantCulture));
+        }
+
+        public DataNode Write(ISerializationManager serializationManager, int value, bool alwaysWrite = false,
+            ISerializationContext? context = null)
+        {
+            return new ValueDataNode(value.ToString(CultureInfo.InvariantCulture));
+        }
+
+        public int Copy(ISerializationManager serializationManager, int source, int target, bool skipHook,
+            ISerializationContext? context = null)
+        {
+            return source;
+        }
+    }
+}

Robust.Benchmarks/Serialization/Copy/SerializationCopyBenchmark.cs

@@ -0,0 +1,151 @@
+using System.IO;
+using System.Linq;
+using BenchmarkDotNet.Attributes;
+using Robust.Benchmarks.Serialization.Definitions;
+using Robust.Shared.Serialization.Manager;
+using Robust.Shared.Serialization.Markdown;
+using Robust.Shared.Serialization.Markdown.Mapping;
+using Robust.Shared.Serialization.Markdown.Sequence;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom;
+using Robust.Shared.Utility;
+using YamlDotNet.RepresentationModel;
+
+namespace Robust.Benchmarks.Serialization.Copy
+{
+    [MemoryDiagnoser]
+    public class SerializationCopyBenchmark : SerializationBenchmark
+    {
+        public SerializationCopyBenchmark()
+        {
+            InitializeSerialization();
+
+            DataDefinitionWithString = new DataDefinitionWithString {StringField = "ABC"};
+
+            var yamlStream = new YamlStream();
+            yamlStream.Load(new StringReader(SeedDataDefinition.Prototype));
+
+            var seedMapping = yamlStream.Documents[0].RootNode.ToDataNodeCast<SequenceDataNode>().Cast<MappingDataNode>(0);
+
+            Seed = SerializationManager.ReadValueOrThrow<SeedDataDefinition>(seedMapping);
+        }
+
+        private const string String = "ABC";
+
+        private const int Integer = 1;
+
+        private DataDefinitionWithString DataDefinitionWithString { get; }
+
+        private SeedDataDefinition Seed { get; }
+
+        private BenchmarkFlagsEnum FlagZero = BenchmarkFlagsEnum.Zero;
+
+        private BenchmarkFlagsEnum FlagThirtyOne = BenchmarkFlagsEnum.ThirtyOne;
+
+        [Benchmark]
+        public string? CreateCopyString()
+        {
+            return SerializationManager.CreateCopy(String);
+        }
+
+        [Benchmark]
+        public int? CreateCopyInteger()
+        {
+            return SerializationManager.CreateCopy(Integer);
+        }
+
+        [Benchmark]
+        public DataDefinitionWithString? CreateCopyDataDefinitionWithString()
+        {
+            return SerializationManager.CreateCopy(DataDefinitionWithString);
+        }
+
+        [Benchmark]
+        public SeedDataDefinition? CreateCopySeedDataDefinition()
+        {
+            return SerializationManager.CreateCopy(Seed);
+        }
+
+        [Benchmark]
+        public SeedDataDefinition BaselineCreateCopySeedDataDefinition()
+        {
+            // ReSharper disable once UseObjectOrCollectionInitializer
+            var copy = new SeedDataDefinition();
+
+            copy.ID = Seed.ID;
+            copy.Name = Seed.Name;
+            copy.SeedName = Seed.SeedName;
+            copy.SeedNoun = Seed.SeedNoun;
+            copy.DisplayName = Seed.DisplayName;
+            copy.RoundStart = Seed.RoundStart;
+            copy.Mysterious = Seed.Mysterious;
+            copy.Immutable = Seed.Immutable;
+
+            copy.ProductPrototypes = Seed.ProductPrototypes.ToList();
+            copy.Chemicals = Seed.Chemicals.ToDictionary(p => p.Key, p => p.Value);
+            copy.ConsumeGasses = Seed.ConsumeGasses.ToDictionary(p => p.Key, p => p.Value);
+            copy.ExudeGasses = Seed.ExudeGasses.ToDictionary(p => p.Key, p => p.Value);
+
+            copy.NutrientConsumption = Seed.NutrientConsumption;
+            copy.WaterConsumption = Seed.WaterConsumption;
+            copy.IdealHeat = Seed.IdealHeat;
+            copy.HeatTolerance = Seed.HeatTolerance;
+            copy.IdealLight = Seed.IdealLight;
+            copy.LightTolerance = Seed.LightTolerance;
+            copy.ToxinsTolerance = Seed.ToxinsTolerance;
+            copy.LowPressureTolerance = Seed.LowPressureTolerance;
+            copy.HighPressureTolerance = Seed.HighPressureTolerance;
+            copy.PestTolerance = Seed.PestTolerance;
+            copy.WeedTolerance = Seed.WeedTolerance;
+
+            copy.Endurance = Seed.Endurance;
+            copy.Yield = Seed.Yield;
+            copy.Lifespan = Seed.Lifespan;
+            copy.Maturation = Seed.Maturation;
+            copy.Production = Seed.Production;
+            copy.GrowthStages = Seed.GrowthStages;
+            copy.HarvestRepeat = Seed.HarvestRepeat;
+            copy.Potency = Seed.Potency;
+            copy.Ligneous = Seed.Ligneous;
+
+            copy.PlantRsi = Seed.PlantRsi == null
+                ? null!
+                : new ResourcePath(Seed.PlantRsi.ToString(), Seed.PlantRsi.Separator);
+            copy.PlantIconState = Seed.PlantIconState;
+            copy.Bioluminescent = Seed.Bioluminescent;
+            copy.BioluminescentColor = Seed.BioluminescentColor;
+            copy.SplatPrototype = Seed.SplatPrototype;
+
+            return copy;
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("flag")]
+        public object? CopyFlagZero()
+        {
+            return SerializationManager.CopyWithTypeSerializer(
+                typeof(FlagSerializer<BenchmarkFlags>),
+                (int) FlagZero,
+                (int) FlagZero);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("flag")]
+        public object? CopyFlagThirtyOne()
+        {
+            return SerializationManager.CopyWithTypeSerializer(
+                typeof(FlagSerializer<BenchmarkFlags>),
+                (int) FlagThirtyOne,
+                (int) FlagThirtyOne);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("customTypeSerializer")]
+        public object? CopyIntegerCustomSerializer()
+        {
+            return SerializationManager.CopyWithTypeSerializer(
+                typeof(BenchmarkIntSerializer),
+                Integer,
+                Integer);
+        }
+    }
+}

Robust.Benchmarks/Serialization/Definitions/BenchmarkFlags.cs

@@ -0,0 +1,19 @@
+using System;
+using Robust.Shared.Serialization;
+
+namespace Robust.Benchmarks.Serialization.Definitions
+{
+    public class BenchmarkFlags
+    {
+        public const int Zero = 1 << 0;
+        public const int ThirtyOne = 1 << 31;
+    }
+
+    [Flags]
+    [FlagsFor(typeof(BenchmarkFlags))]
+    public enum BenchmarkFlagsEnum
+    {
+        Zero = BenchmarkFlags.Zero,
+        ThirtyOne = BenchmarkFlags.ThirtyOne
+    }
+}

Robust.Benchmarks/Serialization/Definitions/DataDefinitionWithString.cs

@@ -0,0 +1,11 @@
+using Robust.Shared.Serialization.Manager.Attributes;
+
+namespace Robust.Benchmarks.Serialization.Definitions
+{
+    [DataDefinition]
+    public class DataDefinitionWithString
+    {
+        [DataField("string")]
+        public string StringField { get; init; } = default!;
+    }
+}

Robust.Benchmarks/Serialization/Definitions/SealedDataDefinitionWithString.cs

@@ -0,0 +1,11 @@
+using Robust.Shared.Serialization.Manager.Attributes;
+
+namespace Robust.Benchmarks.Serialization.Definitions
+{
+    [DataDefinition]
+    public sealed class SealedDataDefinitionWithString
+    {
+        [DataField("string")]
+        public string StringField { get; init; } = default!;
+    }
+}

Robust.Benchmarks/Serialization/Definitions/SeedDataDefinition.cs

@@ -0,0 +1,119 @@
+using System.Collections.Generic;
+using Robust.Shared.Maths;
+using Robust.Shared.Prototypes;
+using Robust.Shared.Serialization.Manager.Attributes;
+using Robust.Shared.Utility;
+
+namespace Robust.Benchmarks.Serialization.Definitions
+{
+    /// <summary>
+    ///     Arbitrarily large data definition for benchmarks.
+    ///     Taken from content.
+    /// </summary>
+    [Prototype("seed")]
+    public class SeedDataDefinition : IPrototype
+    {
+        public const string Prototype = @"
+- type: seed
+  id: tobacco
+  name: tobacco
+  seedName: tobacco
+  displayName: tobacco plant
+  productPrototypes:
+    - LeavesTobacco
+  harvestRepeat: Repeat
+  lifespan: 75
+  maturation: 5
+  production: 5
+  yield: 2
+  potency: 20
+  growthStages: 3
+  idealLight: 9
+  idealHeat: 298
+  chemicals:
+    chem.Nicotine:
+      Min: 1
+      Max: 10
+      PotencyDivisor: 10";
+
+        [DataField("id", required: true)] public string ID { get; set; } = default!;
+
+        #region Tracking
+        [DataField("name")] public string Name { get; set; } = string.Empty;
+        [DataField("seedName")] public string SeedName { get; set; } = string.Empty;
+        [DataField("seedNoun")] public string SeedNoun { get; set; } = "seeds";
+        [DataField("displayName")] public string DisplayName { get; set; } = string.Empty;
+        [DataField("roundStart")] public bool RoundStart { get; set; } = true;
+        [DataField("mysterious")] public bool Mysterious { get; set; }
+        [DataField("immutable")] public bool Immutable { get; set; }
+        #endregion
+
+        #region Output
+        [DataField("productPrototypes")]
+        public List<string> ProductPrototypes { get; set; } = new();
+        [DataField("chemicals")]
+        public Dictionary<string, SeedChemQuantity> Chemicals { get; set; } = new();
+        [DataField("consumeGasses")]
+        public Dictionary<Gas, float> ConsumeGasses { get; set; } = new();
+        [DataField("exudeGasses")]
+        public Dictionary<Gas, float> ExudeGasses { get; set; } = new();
+        #endregion
+
+        #region Tolerances
+        [DataField("nutrientConsumption")] public float NutrientConsumption { get; set; } = 0.25f;
+        [DataField("waterConsumption")] public float WaterConsumption { get; set; } = 3f;
+        [DataField("idealHeat")] public float IdealHeat { get; set; } = 293f;
+        [DataField("heatTolerance")] public float HeatTolerance { get; set; } = 20f;
+        [DataField("idealLight")] public float IdealLight { get; set; } = 7f;
+        [DataField("lightTolerance")] public float LightTolerance { get; set; } = 5f;
+        [DataField("toxinsTolerance")] public float ToxinsTolerance { get; set; } = 4f;
+        [DataField("lowPressureTolerance")] public float LowPressureTolerance { get; set; } = 25f;
+        [DataField("highPressureTolerance")] public float HighPressureTolerance { get; set; } = 200f;
+        [DataField("pestTolerance")] public float PestTolerance { get; set; } = 5f;
+        [DataField("weedTolerance")] public float WeedTolerance { get; set; } = 5f;
+        #endregion
+
+        #region General traits
+        [DataField("endurance")] public float Endurance { get; set; } = 100f;
+        [DataField("yield")] public int Yield { get; set; }
+        [DataField("lifespan")] public float Lifespan { get; set; }
+        [DataField("maturation")] public float Maturation { get; set; }
+        [DataField("production")] public float Production { get; set; }
+        [DataField("growthStages")] public int GrowthStages { get; set; } = 6;
+        [DataField("harvestRepeat")] public HarvestType HarvestRepeat { get; set; } = HarvestType.NoRepeat;
+        [DataField("potency")] public float Potency { get; set; } = 1f;
+        [DataField("ligneous")] public bool Ligneous { get; set; }
+        #endregion
+
+        #region Cosmetics
+        [DataField("plantRsi", required: true)] public ResourcePath PlantRsi { get; set; } = default!;
+        [DataField("plantIconState")] public string PlantIconState { get; set; } = "produce";
+        [DataField("bioluminescent")] public bool Bioluminescent { get; set; }
+        [DataField("bioluminescentColor")] public Color BioluminescentColor { get; set; } = Color.White;
+        [DataField("splatPrototype")] public string? SplatPrototype { get; set; }
+        #endregion
+    }
+
+    public enum HarvestType
+    {
+        NoRepeat,
+        Repeat
+    }
+
+    public enum Gas
+    {
+    }
+
+    [DataDefinition]
+    public struct SeedChemQuantity
+    {
+        [DataField("Min")]
+        public int Min;
+
+        [DataField("Max")]
+        public int Max;
+
+        [DataField("PotencyDivisor")]
+        public int PotencyDivisor;
+    }
+}

Robust.Benchmarks/Serialization/Initialize/SerializationInitializeBenchmark.cs

@@ -0,0 +1,22 @@
+using BenchmarkDotNet.Attributes;
+using Robust.Shared.Serialization.Manager;
+
+namespace Robust.Benchmarks.Serialization.Initialize
+{
+    [MemoryDiagnoser]
+    public class SerializationInitializeBenchmark : SerializationBenchmark
+    {
+        [IterationCleanup]
+        public void IterationCleanup()
+        {
+            SerializationManager.Shutdown();
+        }
+
+        [Benchmark]
+        public ISerializationManager Initialize()
+        {
+            InitializeSerialization();
+            return SerializationManager;
+        }
+    }
+}

Robust.Benchmarks/Serialization/Read/SerializationReadBenchmark.cs

@@ -0,0 +1,96 @@
+using System.IO;
+using BenchmarkDotNet.Attributes;
+using Robust.Benchmarks.Serialization.Definitions;
+using Robust.Shared.Serialization.Manager.Result;
+using Robust.Shared.Serialization.Markdown;
+using Robust.Shared.Serialization.Markdown.Mapping;
+using Robust.Shared.Serialization.Markdown.Sequence;
+using Robust.Shared.Serialization.Markdown.Value;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom;
+using YamlDotNet.RepresentationModel;
+
+namespace Robust.Benchmarks.Serialization.Read
+{
+    [MemoryDiagnoser]
+    public class SerializationReadBenchmark : SerializationBenchmark
+    {
+        public SerializationReadBenchmark()
+        {
+            InitializeSerialization();
+
+            StringDataDefNode = new MappingDataNode();
+            StringDataDefNode.Add(new ValueDataNode("string"), new ValueDataNode("ABC"));
+
+            var yamlStream = new YamlStream();
+            yamlStream.Load(new StringReader(SeedDataDefinition.Prototype));
+
+            SeedNode = yamlStream.Documents[0].RootNode.ToDataNodeCast<SequenceDataNode>().Cast<MappingDataNode>(0);
+        }
+
+        private ValueDataNode StringNode { get; } = new("ABC");
+
+        private ValueDataNode IntNode { get; } = new("1");
+
+        private MappingDataNode StringDataDefNode { get; }
+
+        private MappingDataNode SeedNode { get; }
+
+        private ValueDataNode FlagZero { get; } = new("Zero");
+
+        private ValueDataNode FlagThirtyOne { get; } = new("ThirtyOne");
+
+        [Benchmark]
+        public string? ReadString()
+        {
+            return SerializationManager.ReadValue<string>(StringNode);
+        }
+
+        [Benchmark]
+        public int? ReadInteger()
+        {
+            return SerializationManager.ReadValue<int>(IntNode);
+        }
+
+        [Benchmark]
+        public DataDefinitionWithString? ReadDataDefinitionWithString()
+        {
+            return SerializationManager.ReadValue<DataDefinitionWithString>(StringDataDefNode);
+        }
+
+        [Benchmark]
+        public SeedDataDefinition? ReadSeedDataDefinition()
+        {
+            return SerializationManager.ReadValue<SeedDataDefinition>(SeedNode);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("flag")]
+        public DeserializationResult ReadFlagZero()
+        {
+            return SerializationManager.ReadWithTypeSerializer(
+                typeof(int),
+                typeof(FlagSerializer<BenchmarkFlags>),
+                FlagZero);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("flag")]
+        public DeserializationResult ReadThirtyOne()
+        {
+            return SerializationManager.ReadWithTypeSerializer(
+                typeof(int),
+                typeof(FlagSerializer<BenchmarkFlags>),
+                FlagThirtyOne);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("customTypeSerializer")]
+        public DeserializationResult ReadIntegerCustomSerializer()
+        {
+            return SerializationManager.ReadWithTypeSerializer(
+                typeof(int),
+                typeof(BenchmarkIntSerializer),
+                IntNode);
+        }
+    }
+}

Robust.Benchmarks/Serialization/SerializationArrayBenchmark.cs

@@ -0,0 +1,127 @@
+using BenchmarkDotNet.Attributes;
+using Robust.Benchmarks.Serialization.Definitions;
+using Robust.Shared.Serialization.Markdown.Mapping;
+using Robust.Shared.Serialization.Markdown.Sequence;
+using Robust.Shared.Serialization.Markdown.Value;
+
+namespace Robust.Benchmarks.Serialization
+{
+    [MemoryDiagnoser]
+    public class SerializationArrayBenchmark : SerializationBenchmark
+    {
+        public SerializationArrayBenchmark()
+        {
+            InitializeSerialization();
+
+            OneStringDefNode = new SequenceDataNode();
+            OneStringDefNode.Add(new MappingDataNode
+            {
+                ["string"] = new ValueDataNode("ABC")
+            });
+
+            TenStringDefsNode = new SequenceDataNode();
+
+            for (var i = 0; i < 10; i++)
+            {
+                TenStringDefsNode.Add(new MappingDataNode
+                {
+                    ["string"] = new ValueDataNode("ABC")
+                });
+            }
+        }
+
+        private SequenceDataNode EmptyNode { get; } = new();
+
+        private SequenceDataNode OneIntNode { get; } = new("1");
+
+        private SequenceDataNode TenIntsNode { get; } = new("1", "2", "3", "4", "5", "6", "7", "8", "9", "10");
+
+        private SequenceDataNode OneStringDefNode { get; }
+
+        private SequenceDataNode TenStringDefsNode { get; }
+
+        [Benchmark]
+        [BenchmarkCategory("read")]
+        public string[]? ReadEmptyString()
+        {
+            return SerializationManager.ReadValue<string[]>(EmptyNode);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("read")]
+        public string[]? ReadOneString()
+        {
+            return SerializationManager.ReadValue<string[]>(OneIntNode);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("read")]
+        public string[]? ReadTenStrings()
+        {
+            return SerializationManager.ReadValue<string[]>(TenIntsNode);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("read")]
+        public int[]? ReadEmptyInt()
+        {
+            return SerializationManager.ReadValue<int[]>(EmptyNode);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("read")]
+        public int[]? ReadOneInt()
+        {
+            return SerializationManager.ReadValue<int[]>(OneIntNode);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("read")]
+        public int[]? ReadTenInts()
+        {
+            return SerializationManager.ReadValue<int[]>(TenIntsNode);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("read")]
+        public DataDefinitionWithString[]? ReadEmptyStringDataDef()
+        {
+            return SerializationManager.ReadValue<DataDefinitionWithString[]>(EmptyNode);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("read")]
+        public DataDefinitionWithString[]? ReadOneStringDataDef()
+        {
+            return SerializationManager.ReadValue<DataDefinitionWithString[]>(OneStringDefNode);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("read")]
+        public DataDefinitionWithString[]? ReadTenStringDataDefs()
+        {
+            return SerializationManager.ReadValue<DataDefinitionWithString[]>(TenStringDefsNode);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("read")]
+        public SealedDataDefinitionWithString[]? ReadEmptySealedStringDataDef()
+        {
+            return SerializationManager.ReadValue<SealedDataDefinitionWithString[]>(EmptyNode);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("read")]
+        public SealedDataDefinitionWithString[]? ReadOneSealedStringDataDef()
+        {
+            return SerializationManager.ReadValue<SealedDataDefinitionWithString[]>(OneStringDefNode);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("read")]
+        public SealedDataDefinitionWithString[]? ReadTenSealedStringDataDefs()
+        {
+            return SerializationManager.ReadValue<SealedDataDefinitionWithString[]>(TenStringDefsNode);
+        }
+    }
+}

Robust.Benchmarks/Serialization/SerializationBenchmark.cs

@@ -0,0 +1,43 @@
+using System;
+using Robust.Server;
+using Robust.Shared.Configuration;
+using Robust.Shared.ContentPack;
+using Robust.Shared.IoC;
+using Robust.Shared.Reflection;
+using Robust.Shared.Serialization.Manager;
+
+namespace Robust.Benchmarks.Serialization
+{
+    public abstract class SerializationBenchmark
+    {
+        public SerializationBenchmark()
+        {
+            IoCManager.InitThread();
+            ServerIoC.RegisterIoC();
+            IoCManager.BuildGraph();
+
+            var assemblies = new[]
+            {
+                AppDomain.CurrentDomain.GetAssemblyByName("Robust.Shared"),
+                AppDomain.CurrentDomain.GetAssemblyByName("Robust.Server"),
+                AppDomain.CurrentDomain.GetAssemblyByName("Robust.Benchmarks")
+            };
+
+            foreach (var assembly in assemblies)
+            {
+                IoCManager.Resolve<IConfigurationManagerInternal>().LoadCVarsFromAssembly(assembly);
+            }
+
+            IoCManager.Resolve<IReflectionManager>().LoadAssemblies(assemblies);
+
+            SerializationManager = IoCManager.Resolve<ISerializationManager>();
+        }
+
+        protected ISerializationManager SerializationManager { get; }
+
+        public void InitializeSerialization()
+        {
+            SerializationManager.Initialize();
+        }
+    }
+}

Robust.Benchmarks/Serialization/Write/SerializationWriteBenchmark.cs

@@ -0,0 +1,134 @@
+using System.Globalization;
+using System.IO;
+using BenchmarkDotNet.Attributes;
+using Robust.Benchmarks.Serialization.Definitions;
+using Robust.Shared.Serialization.Manager;
+using Robust.Shared.Serialization.Markdown;
+using Robust.Shared.Serialization.Markdown.Mapping;
+using Robust.Shared.Serialization.Markdown.Sequence;
+using Robust.Shared.Serialization.Markdown.Value;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom;
+using YamlDotNet.RepresentationModel;
+
+namespace Robust.Benchmarks.Serialization.Write
+{
+    [MemoryDiagnoser]
+    public class SerializationWriteBenchmark : SerializationBenchmark
+    {
+        public SerializationWriteBenchmark()
+        {
+            InitializeSerialization();
+
+            DataDefinitionWithString = new DataDefinitionWithString {StringField = "ABC"};
+
+            var yamlStream = new YamlStream();
+            yamlStream.Load(new StringReader(SeedDataDefinition.Prototype));
+
+            var seedMapping = yamlStream.Documents[0].RootNode.ToDataNodeCast<SequenceDataNode>().Cast<MappingDataNode>(0);
+
+            Seed = SerializationManager.ReadValueOrThrow<SeedDataDefinition>(seedMapping);
+        }
+
+        private const string String = "ABC";
+
+        private const int Integer = 1;
+
+        private DataDefinitionWithString DataDefinitionWithString { get; }
+
+        private SeedDataDefinition Seed { get; }
+
+        private BenchmarkFlagsEnum FlagZero = BenchmarkFlagsEnum.Zero;
+
+        private BenchmarkFlagsEnum FlagThirtyOne = BenchmarkFlagsEnum.ThirtyOne;
+
+        [Benchmark]
+        public DataNode WriteString()
+        {
+            return SerializationManager.WriteValue(String);
+        }
+
+        [Benchmark]
+        public DataNode WriteInteger()
+        {
+            return SerializationManager.WriteValue(Integer);
+        }
+
+        [Benchmark]
+        public DataNode WriteDataDefinitionWithString()
+        {
+            return SerializationManager.WriteValue(DataDefinitionWithString);
+        }
+
+        [Benchmark]
+        public DataNode WriteSeedDataDefinition()
+        {
+            return SerializationManager.WriteValue(Seed);
+        }
+
+        [Benchmark]
+        public DataNode BaselineWriteSeedDataDefinition()
+        {
+            var mapping = new MappingDataNode();
+
+            mapping.Add("id", Seed.ID);
+            mapping.Add("name", Seed.Name);
+            mapping.Add("seedName", Seed.SeedName);
+            mapping.Add("displayName", Seed.DisplayName);
+            mapping.Add("productPrototypes", Seed.ProductPrototypes);
+            mapping.Add("harvestRepeat", Seed.HarvestRepeat.ToString());
+            mapping.Add("lifespan", Seed.Lifespan.ToString(CultureInfo.InvariantCulture));
+            mapping.Add("maturation", Seed.Maturation.ToString(CultureInfo.InvariantCulture));
+            mapping.Add("production", Seed.Production.ToString(CultureInfo.InvariantCulture));
+            mapping.Add("yield", Seed.Yield.ToString(CultureInfo.InvariantCulture));
+            mapping.Add("potency", Seed.Potency.ToString(CultureInfo.InvariantCulture));
+            mapping.Add("growthStages", Seed.GrowthStages.ToString(CultureInfo.InvariantCulture));
+            mapping.Add("idealLight", Seed.IdealLight.ToString(CultureInfo.InvariantCulture));
+            mapping.Add("idealHeat", Seed.IdealHeat.ToString(CultureInfo.InvariantCulture));
+
+            var chemicals = new MappingDataNode();
+            foreach (var (name, quantity) in Seed.Chemicals)
+            {
+                chemicals.Add(name, new MappingDataNode
+                {
+                    ["Min"] = new ValueDataNode(quantity.Min.ToString(CultureInfo.InvariantCulture)),
+                    ["Max"] = new ValueDataNode(quantity.Max.ToString(CultureInfo.InvariantCulture)),
+                    ["PotencyDivisor"] = new ValueDataNode(quantity.PotencyDivisor.ToString(CultureInfo.InvariantCulture))
+                });
+            }
+
+            mapping.Add("chemicals", chemicals);
+
+            return mapping;
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("flag")]
+        public DataNode WriteFlagZero()
+        {
+            return SerializationManager.WriteWithTypeSerializer(
+                typeof(int),
+                typeof(FlagSerializer<BenchmarkFlags>),
+                FlagZero);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("flag")]
+        public DataNode WriteThirtyOne()
+        {
+            return SerializationManager.WriteWithTypeSerializer(
+                typeof(int),
+                typeof(FlagSerializer<BenchmarkFlags>),
+                FlagThirtyOne);
+        }
+
+        [Benchmark]
+        [BenchmarkCategory("customTypeSerializer")]
+        public DataNode WriteIntegerCustomSerializer()
+        {
+            return SerializationManager.WriteWithTypeSerializer(
+                typeof(int),
+                typeof(BenchmarkIntSerializer),
+                Integer);
+        }
+    }
+}

Robust.Client.CEF/BeforeBrowseContext.cs

@@ -0,0 +1,32 @@
+using Xilium.CefGlue;
+
+namespace Robust.Client.CEF
+{
+    public sealed class BeforeBrowseContext
+    {
+        internal readonly CefRequest CefRequest;
+
+        public string Url => CefRequest.Url;
+        public string Method => CefRequest.Method;
+
+        public bool IsRedirect { get; }
+        public bool UserGesture { get; }
+
+        public bool IsCancelled { get; private set; }
+
+        internal BeforeBrowseContext(
+            bool isRedirect,
+            bool userGesture,
+            CefRequest cefRequest)
+        {
+            CefRequest = cefRequest;
+            IsRedirect = isRedirect;
+            UserGesture = userGesture;
+        }
+
+        public void DoCancel()
+        {
+            IsCancelled = true;
+        }
+    }
+}

Robust.Client.CEF/BrowserControl.cs

@@ -0,0 +1,593 @@
+using System;
+using System.Collections.Generic;
+using Robust.Client.Graphics;
+using Robust.Client.Input;
+using Robust.Client.UserInterface;
+using Robust.Shared.IoC;
+using Robust.Shared.Log;
+using Robust.Shared.Maths;
+using Robust.Shared.Utility;
+using Robust.Shared.ViewVariables;
+using SixLabors.ImageSharp.PixelFormats;
+using Xilium.CefGlue;
+using static Robust.Client.CEF.CefKeyCodes;
+using static Robust.Client.CEF.CefKeyCodes.ChromiumKeyboardCode;
+using static Robust.Client.Input.Keyboard;
+
+namespace Robust.Client.CEF
+{
+    // Funny browser control to integrate in UI.
+    public class BrowserControl : Control, IBrowserControl, IRawInputControl
+    {
+        private const int ScrollSpeed = 50;
+
+        [Dependency] private readonly IClyde _clyde = default!;
+        [Dependency] private readonly IInputManager _inputMgr = default!;
+        [Dependency] private readonly CefManager _cef = default!;
+
+        private RobustRequestHandler _requestHandler = new RobustRequestHandler(Logger.GetSawmill("root"));
+        private LiveData? _data;
+        private string _startUrl = "about:blank";
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        public string Url
+        {
+            get => _data == null ? _startUrl : _data.Browser.GetMainFrame().Url;
+            set
+            {
+                if (_data == null)
+                    _startUrl = value;
+                else
+                    _data.Browser.GetMainFrame().LoadUrl(value);
+            }
+        }
+
+        [ViewVariables] public bool IsLoading => _data?.Browser.IsLoading ?? false;
+
+        private readonly Dictionary<Key, ChromiumKeyboardCode> _keyMap = new()
+        {
+            [Key.A] = VKEY_A,
+            [Key.B] = VKEY_B,
+            [Key.C] = VKEY_C,
+            [Key.D] = VKEY_D,
+            [Key.E] = VKEY_E,
+            [Key.F] = VKEY_F,
+            [Key.G] = VKEY_G,
+            [Key.H] = VKEY_H,
+            [Key.I] = VKEY_I,
+            [Key.J] = VKEY_J,
+            [Key.K] = VKEY_K,
+            [Key.L] = VKEY_L,
+            [Key.M] = VKEY_M,
+            [Key.N] = VKEY_N,
+            [Key.O] = VKEY_O,
+            [Key.P] = VKEY_P,
+            [Key.Q] = VKEY_Q,
+            [Key.R] = VKEY_R,
+            [Key.S] = VKEY_S,
+            [Key.T] = VKEY_T,
+            [Key.U] = VKEY_U,
+            [Key.V] = VKEY_V,
+            [Key.W] = VKEY_W,
+            [Key.X] = VKEY_X,
+            [Key.Y] = VKEY_Y,
+            [Key.Z] = VKEY_Z,
+            [Key.Num0] = VKEY_0,
+            [Key.Num1] = VKEY_1,
+            [Key.Num2] = VKEY_2,
+            [Key.Num3] = VKEY_3,
+            [Key.Num4] = VKEY_4,
+            [Key.Num5] = VKEY_5,
+            [Key.Num6] = VKEY_6,
+            [Key.Num7] = VKEY_7,
+            [Key.Num8] = VKEY_8,
+            [Key.Num9] = VKEY_9,
+            [Key.NumpadNum0] = VKEY_NUMPAD0,
+            [Key.NumpadNum1] = VKEY_NUMPAD1,
+            [Key.NumpadNum2] = VKEY_NUMPAD2,
+            [Key.NumpadNum3] = VKEY_NUMPAD3,
+            [Key.NumpadNum4] = VKEY_NUMPAD4,
+            [Key.NumpadNum5] = VKEY_NUMPAD5,
+            [Key.NumpadNum6] = VKEY_NUMPAD6,
+            [Key.NumpadNum7] = VKEY_NUMPAD7,
+            [Key.NumpadNum8] = VKEY_NUMPAD8,
+            [Key.NumpadNum9] = VKEY_NUMPAD9,
+            [Key.Escape] = VKEY_ESCAPE,
+            [Key.Control] = VKEY_CONTROL,
+            [Key.Shift] = VKEY_SHIFT,
+            [Key.Alt] = VKEY_MENU,
+            [Key.LSystem] = VKEY_LWIN,
+            [Key.RSystem] = VKEY_RWIN,
+            [Key.LBracket] = VKEY_OEM_4,
+            [Key.RBracket] = VKEY_OEM_6,
+            [Key.SemiColon] = VKEY_OEM_1,
+            [Key.Comma] = VKEY_OEM_COMMA,
+            [Key.Period] = VKEY_OEM_PERIOD,
+            [Key.Apostrophe] = VKEY_OEM_7,
+            [Key.Slash] = VKEY_OEM_2,
+            [Key.BackSlash] = VKEY_OEM_5,
+            [Key.Tilde] = VKEY_OEM_3,
+            [Key.Equal] = VKEY_OEM_PLUS,
+            [Key.Space] = VKEY_SPACE,
+            [Key.Return] = VKEY_RETURN,
+            [Key.BackSpace] = VKEY_BACK,
+            [Key.Tab] = VKEY_TAB,
+            [Key.PageUp] = VKEY_PRIOR,
+            [Key.PageDown] = VKEY_NEXT,
+            [Key.End] = VKEY_END,
+            [Key.Home] = VKEY_HOME,
+            [Key.Insert] = VKEY_INSERT,
+            [Key.Delete] = VKEY_DELETE,
+            [Key.Minus] = VKEY_OEM_MINUS,
+            [Key.NumpadAdd] = VKEY_ADD,
+            [Key.NumpadSubtract] = VKEY_SUBTRACT,
+            [Key.NumpadDivide] = VKEY_DIVIDE,
+            [Key.NumpadMultiply] = VKEY_MULTIPLY,
+            [Key.NumpadDecimal] = VKEY_DECIMAL,
+            [Key.Left] = VKEY_LEFT,
+            [Key.Right] = VKEY_RIGHT,
+            [Key.Up] = VKEY_UP,
+            [Key.Down] = VKEY_DOWN,
+            [Key.F1] = VKEY_F1,
+            [Key.F2] = VKEY_F2,
+            [Key.F3] = VKEY_F3,
+            [Key.F4] = VKEY_F4,
+            [Key.F5] = VKEY_F5,
+            [Key.F6] = VKEY_F6,
+            [Key.F7] = VKEY_F7,
+            [Key.F8] = VKEY_F8,
+            [Key.F9] = VKEY_F9,
+            [Key.F10] = VKEY_F10,
+            [Key.F11] = VKEY_F11,
+            [Key.F12] = VKEY_F12,
+            [Key.F13] = VKEY_F13,
+            [Key.F14] = VKEY_F14,
+            [Key.F15] = VKEY_F15,
+            [Key.Pause] = VKEY_PAUSE,
+        };
+
+        public BrowserControl()
+        {
+            CanKeyboardFocus = true;
+            KeyboardFocusOnClick = true;
+            MouseFilter = MouseFilterMode.Stop;
+
+            IoCManager.InjectDependencies(this);
+        }
+
+        protected override void EnteredTree()
+        {
+            base.EnteredTree();
+
+            _cef.CheckInitialized();
+
+            DebugTools.AssertNull(_data);
+
+            // A funny render handler that will allow us to render to the control.
+            var renderer = new ControlRenderHandler(this);
+
+            // A funny web cef client. This can actually be shared by multiple browsers, but I'm not sure how the
+            // rendering would work in that case? TODO CEF: Investigate a way to share the web client?
+            var client = new RobustCefClient(renderer, _requestHandler, new RobustLoadHandler());
+
+            var info = CefWindowInfo.Create();
+
+            // FUNFACT: If you DO NOT set these below and set info.Width/info.Height instead, you get an external window
+            // Good to know, huh? Setup is the same, except you can pass a dummy render handler to the CEF client.
+            info.SetAsWindowless(IntPtr.Zero, false); // TODO CEF: Pass parent handle?
+            info.WindowlessRenderingEnabled = true;
+
+            var settings = new CefBrowserSettings()
+            {
+                WindowlessFrameRate = 60
+            };
+
+            // Create the web browser! And by default, we go to about:blank.
+            var browser = CefBrowserHost.CreateBrowserSync(info, client, settings, _startUrl);
+
+            var texture = _clyde.CreateBlankTexture<Bgra32>(Vector2i.One);
+
+            _data = new LiveData(texture, client, browser, renderer);
+        }
+
+        protected override void ExitedTree()
+        {
+            base.ExitedTree();
+
+            DebugTools.AssertNotNull(_data);
+
+            _data!.Texture.Dispose();
+            _data.Browser.GetHost().CloseBrowser(true);
+            _data = null;
+        }
+
+        protected internal override void MouseMove(GUIMouseMoveEventArgs args)
+        {
+            base.MouseMove(args);
+
+            if (_data == null)
+                return;
+
+            // Logger.Debug();
+            var modifiers = CalcMouseModifiers();
+            var mouseEvent = new CefMouseEvent(
+                (int) args.RelativePosition.X, (int) args.RelativePosition.Y,
+                modifiers);
+
+            _data.Browser.GetHost().SendMouseMoveEvent(mouseEvent, false);
+        }
+
+        protected internal override void MouseExited()
+        {
+            base.MouseExited();
+
+            if (_data == null)
+                return;
+
+            var modifiers = CalcMouseModifiers();
+
+            _data.Browser.GetHost().SendMouseMoveEvent(new CefMouseEvent(0, 0, modifiers), true);
+        }
+
+        protected internal override void MouseWheel(GUIMouseWheelEventArgs args)
+        {
+            base.MouseWheel(args);
+
+            if (_data == null)
+                return;
+
+            var modifiers = CalcMouseModifiers();
+            var mouseEvent = new CefMouseEvent(
+                (int) args.RelativePosition.X, (int) args.RelativePosition.Y,
+                modifiers);
+
+            _data.Browser.GetHost().SendMouseWheelEvent(
+                mouseEvent,
+                (int) args.Delta.X * ScrollSpeed,
+                (int) args.Delta.Y * ScrollSpeed);
+        }
+
+        bool IRawInputControl.RawKeyEvent(in GuiRawKeyEvent guiRawEvent)
+        {
+            if (_data == null)
+                return false;
+
+            var host = _data.Browser.GetHost();
+
+            if (guiRawEvent.Key is Key.MouseLeft or Key.MouseMiddle or Key.MouseRight)
+            {
+                var key = guiRawEvent.Key switch
+                {
+                    Key.MouseLeft => CefMouseButtonType.Left,
+                    Key.MouseMiddle => CefMouseButtonType.Middle,
+                    Key.MouseRight => CefMouseButtonType.Right,
+                    _ => default // not possible
+                };
+
+                var mouseEvent = new CefMouseEvent(
+                    guiRawEvent.MouseRelative.X, guiRawEvent.MouseRelative.Y,
+                    CefEventFlags.None);
+
+                // Logger.Debug($"MOUSE: {guiRawEvent.Action} {guiRawEvent.Key} {guiRawEvent.ScanCode} {key}");
+
+                // TODO: double click support?
+                host.SendMouseClickEvent(mouseEvent, key, guiRawEvent.Action == RawKeyAction.Up, 1);
+            }
+            else
+            {
+                // TODO: Handle left/right modifier keys??
+                if (!_keyMap.TryGetValue(guiRawEvent.Key, out var vkKey))
+                    vkKey = default;
+
+                // Logger.Debug($"{guiRawEvent.Action} {guiRawEvent.Key} {guiRawEvent.ScanCode} {vkKey}");
+
+                var lParam = 0;
+                lParam |= (guiRawEvent.ScanCode & 0xFF) << 16;
+                if (guiRawEvent.Action != RawKeyAction.Down)
+                    lParam |= 1 << 30;
+
+                if (guiRawEvent.Action == RawKeyAction.Up)
+                    lParam |= 1 << 31;
+
+                var modifiers = CalcModifiers(guiRawEvent.Key);
+
+                host.SendKeyEvent(new CefKeyEvent
+                {
+                    // Repeats are sent as key downs, I guess?
+                    EventType = guiRawEvent.Action == RawKeyAction.Up
+                        ? CefKeyEventType.KeyUp
+                        : CefKeyEventType.RawKeyDown,
+                    NativeKeyCode = lParam,
+                    // NativeKeyCode = guiRawEvent.ScanCode,
+                    WindowsKeyCode = (int) vkKey,
+                    IsSystemKey = false, // TODO
+                    Modifiers = modifiers
+                });
+
+                if (guiRawEvent.Action != RawKeyAction.Up && guiRawEvent.Key == Key.Return)
+                {
+                    host.SendKeyEvent(new CefKeyEvent
+                    {
+                        EventType = CefKeyEventType.Char,
+                        WindowsKeyCode = '\r',
+                        NativeKeyCode = lParam,
+                        Modifiers = modifiers
+                    });
+                }
+            }
+
+            return true;
+        }
+
+        private CefEventFlags CalcModifiers(Key key)
+        {
+            CefEventFlags modifiers = default;
+
+            if (_inputMgr.IsKeyDown(Key.Control))
+                modifiers |= CefEventFlags.ControlDown;
+
+            if (_inputMgr.IsKeyDown(Key.Alt))
+                modifiers |= CefEventFlags.AltDown;
+
+            if (_inputMgr.IsKeyDown(Key.Shift))
+                modifiers |= CefEventFlags.ShiftDown;
+
+            if (_inputMgr.IsKeyDown(Key.Shift))
+                modifiers |= CefEventFlags.ShiftDown;
+
+            return modifiers;
+        }
+
+        private CefEventFlags CalcMouseModifiers()
+        {
+            CefEventFlags modifiers = default;
+
+            if (_inputMgr.IsKeyDown(Key.Control))
+                modifiers |= CefEventFlags.ControlDown;
+
+            if (_inputMgr.IsKeyDown(Key.Alt))
+                modifiers |= CefEventFlags.AltDown;
+
+            if (_inputMgr.IsKeyDown(Key.Shift))
+                modifiers |= CefEventFlags.ShiftDown;
+
+            if (_inputMgr.IsKeyDown(Key.Shift))
+                modifiers |= CefEventFlags.ShiftDown;
+
+            if (_inputMgr.IsKeyDown(Key.MouseLeft))
+                modifiers |= CefEventFlags.LeftMouseButton;
+
+            if (_inputMgr.IsKeyDown(Key.MouseMiddle))
+                modifiers |= CefEventFlags.MiddleMouseButton;
+
+            if (_inputMgr.IsKeyDown(Key.MouseRight))
+                modifiers |= CefEventFlags.RightMouseButton;
+
+            return modifiers;
+        }
+
+        protected internal override void TextEntered(GUITextEventArgs args)
+        {
+            base.TextEntered(args);
+
+            if (_data == null)
+                return;
+
+            var host = _data.Browser.GetHost();
+
+            Span<char> buf = stackalloc char[2];
+            var written = args.AsRune.EncodeToUtf16(buf);
+
+            for (var i = 0; i < written; i++)
+            {
+                host.SendKeyEvent(new CefKeyEvent
+                {
+                    EventType = CefKeyEventType.Char,
+                    WindowsKeyCode = buf[i],
+                    Character = buf[i],
+                    UnmodifiedCharacter = buf[i]
+                });
+            }
+        }
+
+        protected override void Resized()
+        {
+            base.Resized();
+
+            if (_data == null)
+                return;
+
+            _data.Browser.GetHost().NotifyMoveOrResizeStarted();
+            _data.Browser.GetHost().WasResized();
+            _data.Texture.Dispose();
+            _data.Texture = _clyde.CreateBlankTexture<Bgra32>((PixelWidth, PixelHeight));
+        }
+
+        protected internal override void Draw(DrawingHandleScreen handle)
+        {
+            base.Draw(handle);
+
+            if (_data == null)
+                return;
+
+            var bufImg = _data.Renderer.Buffer.Buffer;
+
+            _data.Texture.SetSubImage(
+                Vector2i.Zero,
+                bufImg,
+                new UIBox2i(
+                    0, 0,
+                    Math.Min(PixelWidth, bufImg.Width),
+                    Math.Min(PixelHeight, bufImg.Height)));
+
+            handle.DrawTexture(_data.Texture, Vector2.Zero);
+        }
+
+        public void StopLoad()
+        {
+            if (_data == null)
+                throw new InvalidOperationException();
+
+            _data.Browser.StopLoad();
+        }
+
+        public void Reload()
+        {
+            if (_data == null)
+                throw new InvalidOperationException();
+
+            _data.Browser.Reload();
+        }
+
+        public bool GoBack()
+        {
+            if (_data == null)
+                throw new InvalidOperationException();
+
+            if (!_data.Browser.CanGoBack)
+                return false;
+
+            _data.Browser.GoBack();
+            return true;
+        }
+
+        public bool GoForward()
+        {
+            if (_data == null)
+                throw new InvalidOperationException();
+
+            if (!_data.Browser.CanGoForward)
+                return false;
+
+            _data.Browser.GoForward();
+            return true;
+        }
+
+        public void ExecuteJavaScript(string code)
+        {
+            if (_data == null)
+                throw new InvalidOperationException();
+
+            // TODO: this should not run until the browser is done loading seriously does this even work?
+            _data.Browser.GetMainFrame().ExecuteJavaScript(code, string.Empty, 1);
+        }
+
+        public void AddResourceRequestHandler(Action<RequestHandlerContext> handler)
+        {
+            _requestHandler.AddResourceRequestHandler(handler);
+        }
+
+        public void RemoveResourceRequestHandler(Action<RequestHandlerContext> handler)
+        {
+            _requestHandler.RemoveResourceRequestHandler(handler);
+        }
+
+        public void AddBeforeBrowseHandler(Action<BeforeBrowseContext> handler)
+        {
+            _requestHandler.AddBeforeBrowseHandler(handler);
+        }
+
+        public void RemoveBeforeBrowseHandler(Action<BeforeBrowseContext> handler)
+        {
+            _requestHandler.RemoveBeforeBrowseHandler(handler);
+        }
+
+        private sealed class LiveData
+        {
+            public OwnedTexture Texture;
+            public readonly RobustCefClient Client;
+            public readonly CefBrowser Browser;
+            public readonly ControlRenderHandler Renderer;
+
+            public LiveData(
+                OwnedTexture texture,
+                RobustCefClient client,
+                CefBrowser browser,
+                ControlRenderHandler renderer)
+            {
+                Texture = texture;
+                Client = client;
+                Browser = browser;
+                Renderer = renderer;
+            }
+        }
+    }
+
+    internal class ControlRenderHandler : CefRenderHandler
+    {
+        public ImageBuffer Buffer { get; }
+        private Control _control;
+
+        internal ControlRenderHandler(Control control)
+        {
+            Buffer = new ImageBuffer(control);
+            _control = control;
+        }
+
+        protected override CefAccessibilityHandler? GetAccessibilityHandler() => null;
+
+        protected override void GetViewRect(CefBrowser browser, out CefRectangle rect)
+        {
+            if (_control.Disposed)
+            {
+                rect = new CefRectangle();
+                return;
+            }
+
+            // TODO CEF: Do we need to pass real screen coords? Cause what we do already works...
+            //var screenCoords = _control.ScreenCoordinates;
+            //rect = new CefRectangle((int) screenCoords.X, (int) screenCoords.Y, (int)Math.Max(_control.Size.X, 1), (int)Math.Max(_control.Size.Y, 1));
+
+            // We do the max between size and 1 because it will LITERALLY CRASH WITHOUT AN ERROR otherwise.
+            rect = new CefRectangle(0, 0, (int) Math.Max(_control.Size.X, 1), (int) Math.Max(_control.Size.Y, 1));
+        }
+
+        protected override bool GetScreenInfo(CefBrowser browser, CefScreenInfo screenInfo)
+        {
+            if (_control.Disposed)
+                return false;
+
+            // TODO CEF: Get actual scale factor?
+            screenInfo.DeviceScaleFactor = 1.0f;
+
+            return true;
+        }
+
+        protected override void OnPopupSize(CefBrowser browser, CefRectangle rect)
+        {
+            if (_control.Disposed)
+                return;
+        }
+
+        protected override void OnPaint(CefBrowser browser, CefPaintElementType type, CefRectangle[] dirtyRects,
+            IntPtr buffer, int width, int height)
+        {
+            if (_control.Disposed)
+                return;
+
+            foreach (var dirtyRect in dirtyRects)
+            {
+                Buffer.UpdateBuffer(width, height, buffer, dirtyRect);
+            }
+        }
+
+        protected override void OnAcceleratedPaint(CefBrowser browser, CefPaintElementType type,
+            CefRectangle[] dirtyRects, IntPtr sharedHandle)
+        {
+            // Unused, but we're forced to implement it so.. NOOP.
+        }
+
+        protected override void OnScrollOffsetChanged(CefBrowser browser, double x, double y)
+        {
+            if (_control.Disposed)
+                return;
+        }
+
+        protected override void OnImeCompositionRangeChanged(CefBrowser browser, CefRange selectedRange,
+            CefRectangle[] characterBounds)
+        {
+            if (_control.Disposed)
+                return;
+        }
+    }
+}

Robust.Client.CEF/BrowserWindowCreateParameters.cs

@@ -0,0 +1,16 @@
+namespace Robust.Client.CEF
+{
+    public sealed class BrowserWindowCreateParameters
+    {
+        public int Width { get; set; }
+        public int Height { get; set; }
+
+        public string Url { get; set; } = "about:blank";
+
+        public BrowserWindowCreateParameters(int width, int height)
+        {
+            Width = width;
+            Height = height;
+        }
+    }
+}

Robust.Client.CEF/CefKeyCodes.cs

@@ -0,0 +1,225 @@
+
+using System.Diagnostics.CodeAnalysis;
+
+namespace Robust.Client.CEF
+{
+    [SuppressMessage("ReSharper", "InconsistentNaming")]
+    [SuppressMessage("ReSharper", "UnusedMember.Global")]
+    [SuppressMessage("ReSharper", "IdentifierTypo")]
+    [SuppressMessage("ReSharper", "CA1069")]
+    [SuppressMessage("ReSharper", "CommentTypo")]
+    internal static class CefKeyCodes
+    {
+        // Taken from https://chromium.googlesource.com/chromium/src/+/refs/heads/main/ui/events/keycodes/keyboard_codes_posix.h
+        // See also https://docs.microsoft.com/en-us/windows/win32/inputdev/virtual-key-codes
+        public enum ChromiumKeyboardCode
+        {
+            VKEY_CANCEL = 0x03,
+            VKEY_BACK = 0x08,
+            VKEY_TAB = 0x09,
+            VKEY_BACKTAB = 0x0A,
+            VKEY_CLEAR = 0x0C,
+            VKEY_RETURN = 0x0D,
+            VKEY_SHIFT = 0x10,
+            VKEY_CONTROL = 0x11,
+            VKEY_MENU = 0x12,
+            VKEY_PAUSE = 0x13,
+            VKEY_CAPITAL = 0x14,
+            VKEY_KANA = 0x15,
+            VKEY_HANGUL = 0x15,
+            VKEY_PASTE = 0x16,
+            VKEY_JUNJA = 0x17,
+            VKEY_FINAL = 0x18,
+            VKEY_HANJA = 0x19,
+            VKEY_KANJI = 0x19,
+            VKEY_ESCAPE = 0x1B,
+            VKEY_CONVERT = 0x1C,
+            VKEY_NONCONVERT = 0x1D,
+            VKEY_ACCEPT = 0x1E,
+            VKEY_MODECHANGE = 0x1F,
+            VKEY_SPACE = 0x20,
+            VKEY_PRIOR = 0x21,
+            VKEY_NEXT = 0x22,
+            VKEY_END = 0x23,
+            VKEY_HOME = 0x24,
+            VKEY_LEFT = 0x25,
+            VKEY_UP = 0x26,
+            VKEY_RIGHT = 0x27,
+            VKEY_DOWN = 0x28,
+            VKEY_SELECT = 0x29,
+            VKEY_PRINT = 0x2A,
+            VKEY_EXECUTE = 0x2B,
+            VKEY_SNAPSHOT = 0x2C, // Print Screen / SysRq
+            VKEY_INSERT = 0x2D,
+            VKEY_DELETE = 0x2E,
+            VKEY_HELP = 0x2F,
+            VKEY_0 = 0x30,
+            VKEY_1 = 0x31,
+            VKEY_2 = 0x32,
+            VKEY_3 = 0x33,
+            VKEY_4 = 0x34,
+            VKEY_5 = 0x35,
+            VKEY_6 = 0x36,
+            VKEY_7 = 0x37,
+            VKEY_8 = 0x38,
+            VKEY_9 = 0x39,
+            VKEY_A = 0x41,
+            VKEY_B = 0x42,
+            VKEY_C = 0x43,
+            VKEY_D = 0x44,
+            VKEY_E = 0x45,
+            VKEY_F = 0x46,
+            VKEY_G = 0x47,
+            VKEY_H = 0x48,
+            VKEY_I = 0x49,
+            VKEY_J = 0x4A,
+            VKEY_K = 0x4B,
+            VKEY_L = 0x4C,
+            VKEY_M = 0x4D,
+            VKEY_N = 0x4E,
+            VKEY_O = 0x4F,
+            VKEY_P = 0x50,
+            VKEY_Q = 0x51,
+            VKEY_R = 0x52,
+            VKEY_S = 0x53,
+            VKEY_T = 0x54,
+            VKEY_U = 0x55,
+            VKEY_V = 0x56,
+            VKEY_W = 0x57,
+            VKEY_X = 0x58,
+            VKEY_Y = 0x59,
+            VKEY_Z = 0x5A,
+            VKEY_LWIN = 0x5B,
+            VKEY_COMMAND = VKEY_LWIN, // Provide the Mac name for convenience.
+            VKEY_RWIN = 0x5C,
+            VKEY_APPS = 0x5D,
+            VKEY_SLEEP = 0x5F,
+            VKEY_NUMPAD0 = 0x60,
+            VKEY_NUMPAD1 = 0x61,
+            VKEY_NUMPAD2 = 0x62,
+            VKEY_NUMPAD3 = 0x63,
+            VKEY_NUMPAD4 = 0x64,
+            VKEY_NUMPAD5 = 0x65,
+            VKEY_NUMPAD6 = 0x66,
+            VKEY_NUMPAD7 = 0x67,
+            VKEY_NUMPAD8 = 0x68,
+            VKEY_NUMPAD9 = 0x69,
+            VKEY_MULTIPLY = 0x6A,
+            VKEY_ADD = 0x6B,
+            VKEY_SEPARATOR = 0x6C,
+            VKEY_SUBTRACT = 0x6D,
+            VKEY_DECIMAL = 0x6E,
+            VKEY_DIVIDE = 0x6F,
+            VKEY_F1 = 0x70,
+            VKEY_F2 = 0x71,
+            VKEY_F3 = 0x72,
+            VKEY_F4 = 0x73,
+            VKEY_F5 = 0x74,
+            VKEY_F6 = 0x75,
+            VKEY_F7 = 0x76,
+            VKEY_F8 = 0x77,
+            VKEY_F9 = 0x78,
+            VKEY_F10 = 0x79,
+            VKEY_F11 = 0x7A,
+            VKEY_F12 = 0x7B,
+            VKEY_F13 = 0x7C,
+            VKEY_F14 = 0x7D,
+            VKEY_F15 = 0x7E,
+            VKEY_F16 = 0x7F,
+            VKEY_F17 = 0x80,
+            VKEY_F18 = 0x81,
+            VKEY_F19 = 0x82,
+            VKEY_F20 = 0x83,
+            VKEY_F21 = 0x84,
+            VKEY_F22 = 0x85,
+            VKEY_F23 = 0x86,
+            VKEY_F24 = 0x87,
+            VKEY_NUMLOCK = 0x90,
+            VKEY_SCROLL = 0x91,
+            VKEY_LSHIFT = 0xA0,
+            VKEY_RSHIFT = 0xA1,
+            VKEY_LCONTROL = 0xA2,
+            VKEY_RCONTROL = 0xA3,
+            VKEY_LMENU = 0xA4,
+            VKEY_RMENU = 0xA5,
+            VKEY_BROWSER_BACK = 0xA6,
+            VKEY_BROWSER_FORWARD = 0xA7,
+            VKEY_BROWSER_REFRESH = 0xA8,
+            VKEY_BROWSER_STOP = 0xA9,
+            VKEY_BROWSER_SEARCH = 0xAA,
+            VKEY_BROWSER_FAVORITES = 0xAB,
+            VKEY_BROWSER_HOME = 0xAC,
+            VKEY_VOLUME_MUTE = 0xAD,
+            VKEY_VOLUME_DOWN = 0xAE,
+            VKEY_VOLUME_UP = 0xAF,
+            VKEY_MEDIA_NEXT_TRACK = 0xB0,
+            VKEY_MEDIA_PREV_TRACK = 0xB1,
+            VKEY_MEDIA_STOP = 0xB2,
+            VKEY_MEDIA_PLAY_PAUSE = 0xB3,
+            VKEY_MEDIA_LAUNCH_MAIL = 0xB4,
+            VKEY_MEDIA_LAUNCH_MEDIA_SELECT = 0xB5,
+            VKEY_MEDIA_LAUNCH_APP1 = 0xB6,
+            VKEY_MEDIA_LAUNCH_APP2 = 0xB7,
+            VKEY_OEM_1 = 0xBA,
+            VKEY_OEM_PLUS = 0xBB,
+            VKEY_OEM_COMMA = 0xBC,
+            VKEY_OEM_MINUS = 0xBD,
+            VKEY_OEM_PERIOD = 0xBE,
+            VKEY_OEM_2 = 0xBF,
+            VKEY_OEM_3 = 0xC0,
+            VKEY_OEM_4 = 0xDB,
+            VKEY_OEM_5 = 0xDC,
+            VKEY_OEM_6 = 0xDD,
+            VKEY_OEM_7 = 0xDE,
+            VKEY_OEM_8 = 0xDF,
+            VKEY_OEM_102 = 0xE2,
+            VKEY_OEM_103 = 0xE3, // GTV KEYCODE_MEDIA_REWIND
+            VKEY_OEM_104 = 0xE4, // GTV KEYCODE_MEDIA_FAST_FORWARD
+            VKEY_PROCESSKEY = 0xE5,
+            VKEY_PACKET = 0xE7,
+            VKEY_OEM_ATTN = 0xF0, // JIS DomKey::ALPHANUMERIC
+            VKEY_OEM_FINISH = 0xF1, // JIS DomKey::KATAKANA
+            VKEY_OEM_COPY = 0xF2, // JIS DomKey::HIRAGANA
+            VKEY_DBE_SBCSCHAR = 0xF3, // JIS DomKey::HANKAKU
+            VKEY_DBE_DBCSCHAR = 0xF4, // JIS DomKey::ZENKAKU
+            VKEY_OEM_BACKTAB = 0xF5, // JIS DomKey::ROMAJI
+            VKEY_ATTN = 0xF6, // DomKey::ATTN or JIS DomKey::KANA_MODE
+            VKEY_CRSEL = 0xF7,
+            VKEY_EXSEL = 0xF8,
+            VKEY_EREOF = 0xF9,
+            VKEY_PLAY = 0xFA,
+            VKEY_ZOOM = 0xFB,
+            VKEY_NONAME = 0xFC,
+            VKEY_PA1 = 0xFD,
+            VKEY_OEM_CLEAR = 0xFE,
+            VKEY_UNKNOWN = 0,
+
+            // POSIX specific VKEYs. Note that as of Windows SDK 7.1, 0x97-9F, 0xD8-DA,
+            // and 0xE8 are unassigned.
+            VKEY_WLAN = 0x97,
+            VKEY_POWER = 0x98,
+            VKEY_ASSISTANT = 0x99,
+            VKEY_SETTINGS = 0x9A,
+            VKEY_PRIVACY_SCREEN_TOGGLE = 0x9B,
+            VKEY_BRIGHTNESS_DOWN = 0xD8,
+            VKEY_BRIGHTNESS_UP = 0xD9,
+            VKEY_KBD_BRIGHTNESS_DOWN = 0xDA,
+            VKEY_KBD_BRIGHTNESS_UP = 0xE8,
+
+            // Windows does not have a specific key code for AltGr. We use the unused 0xE1
+            // (VK_OEM_AX) code to represent AltGr, matching the behaviour of Firefox on
+            // Linux.
+            VKEY_ALTGR = 0xE1,
+
+            // Windows does not have a specific key code for Compose. We use the unused
+            // 0xE6 (VK_ICO_CLEAR) code to represent Compose.
+            VKEY_COMPOSE = 0xE6,
+
+            // Windows does not have specific key codes for Media Play and Media Pause. We
+            // use the unused 0xE9 (VK_OEM_RESET) and 0xEA (VK_OEM_JUMP) codes to
+            // represent them.
+            VKEY_MEDIA_PLAY = 0xE9,
+            VKEY_MEDIA_PAUSE = 0xEA,
+        };
+    }
+}

Robust.Client.CEF/CefManager.BrowserWindow.cs

@@ -0,0 +1,186 @@
+using System;
+using System.Collections.Generic;
+using Robust.Client.Graphics;
+using Robust.Shared.IoC;
+using Robust.Shared.Log;
+using Robust.Shared.ViewVariables;
+using Xilium.CefGlue;
+
+namespace Robust.Client.CEF
+{
+    public partial class CefManager
+    {
+        [Dependency] private readonly IClydeInternal _clyde = default!;
+
+        private readonly List<BrowserWindowImpl> _browserWindows = new();
+
+        public IEnumerable<IBrowserWindow> AllBrowserWindows => _browserWindows;
+
+        public IBrowserWindow CreateBrowserWindow(BrowserWindowCreateParameters createParams)
+        {
+            var mainHWnd = (_clyde.MainWindow as IClydeWindowInternal)?.WindowsHWnd ?? 0;
+
+            var info = CefWindowInfo.Create();
+            info.Width = createParams.Width;
+            info.Height = createParams.Height;
+            info.SetAsPopup(mainHWnd, "ss14cef");
+
+            var impl = new BrowserWindowImpl(this);
+
+            var lifeSpanHandler = new WindowLifeSpanHandler(impl);
+            var reqHandler = new RobustRequestHandler(Logger.GetSawmill("root"));
+            var client = new WindowCefClient(lifeSpanHandler, reqHandler);
+            var settings = new CefBrowserSettings();
+
+            impl.Browser = CefBrowserHost.CreateBrowserSync(info, client, settings, createParams.Url);
+            impl.RequestHandler = reqHandler;
+
+            _browserWindows.Add(impl);
+
+            return impl;
+        }
+
+        private sealed class BrowserWindowImpl : IBrowserWindow
+        {
+            private readonly CefManager _manager;
+            internal CefBrowser Browser = default!;
+            internal RobustRequestHandler RequestHandler = default!;
+
+            public Action<RequestHandlerContext>? OnResourceRequest { get; set; }
+
+            [ViewVariables(VVAccess.ReadWrite)]
+            public string Url
+            {
+                get
+                {
+                    CheckClosed();
+                    return Browser.GetMainFrame().Url;
+                }
+                set
+                {
+                    CheckClosed();
+                    Browser.GetMainFrame().LoadUrl(value);
+                }
+            }
+
+            [ViewVariables]
+            public bool IsLoading
+            {
+                get
+                {
+                    CheckClosed();
+                    return Browser.IsLoading;
+                }
+            }
+
+            public BrowserWindowImpl(CefManager manager)
+            {
+                _manager = manager;
+            }
+
+            public void StopLoad()
+            {
+                CheckClosed();
+                Browser.StopLoad();
+            }
+
+            public void Reload()
+            {
+                CheckClosed();
+                Browser.Reload();
+            }
+
+            public bool GoBack()
+            {
+                CheckClosed();
+                if (!Browser.CanGoBack)
+                    return false;
+
+                Browser.GoBack();
+                return true;
+            }
+
+            public bool GoForward()
+            {
+                CheckClosed();
+                if (!Browser.CanGoForward)
+                    return false;
+
+                Browser.GoForward();
+                return true;
+            }
+
+            public void ExecuteJavaScript(string code)
+            {
+                CheckClosed();
+                Browser.GetMainFrame().ExecuteJavaScript(code, string.Empty, 1);
+            }
+
+            public void AddResourceRequestHandler(Action<RequestHandlerContext> handler)
+            {
+                RequestHandler.AddResourceRequestHandler(handler);
+            }
+
+            public void RemoveResourceRequestHandler(Action<RequestHandlerContext> handler)
+            {
+                RequestHandler.RemoveResourceRequestHandler(handler);
+            }
+
+            public void Dispose()
+            {
+                if (Closed)
+                    return;
+
+                Browser.GetHost().CloseBrowser(true);
+                Closed = true;
+            }
+
+            public bool Closed { get; private set; }
+
+            public void OnClose()
+            {
+                Closed = true;
+                _manager._browserWindows.Remove(this);
+                Logger.Debug("Removing window");
+            }
+
+            private void CheckClosed()
+            {
+                if (Closed)
+                    throw new ObjectDisposedException("BrowserWindow");
+            }
+        }
+
+        private sealed class WindowCefClient : CefClient
+        {
+            private readonly CefLifeSpanHandler _lifeSpanHandler;
+            private readonly CefRequestHandler _requestHandler;
+
+            public WindowCefClient(CefLifeSpanHandler lifeSpanHandler, CefRequestHandler requestHandler)
+            {
+                _lifeSpanHandler = lifeSpanHandler;
+                _requestHandler = requestHandler;
+            }
+
+            protected override CefLifeSpanHandler GetLifeSpanHandler() => _lifeSpanHandler;
+            protected override CefRequestHandler GetRequestHandler() => _requestHandler;
+        }
+
+        private sealed class WindowLifeSpanHandler : CefLifeSpanHandler
+        {
+            private readonly BrowserWindowImpl _windowImpl;
+
+            public WindowLifeSpanHandler(BrowserWindowImpl windowImpl)
+            {
+                _windowImpl = windowImpl;
+            }
+
+            protected override void OnBeforeClose(CefBrowser browser)
+            {
+                base.OnBeforeClose(browser);
+
+                _windowImpl.OnClose();
+            }
+        }
+    }
+}

Robust.Client.CEF/CefManager.cs

@@ -0,0 +1,104 @@
+using System;
+using System.IO;
+using JetBrains.Annotations;
+using Robust.Shared.ContentPack;
+using Robust.Shared.Log;
+using Robust.Shared.Utility;
+
+// The library we're using right now. TODO CEF: Do we want to use something else? We will need to ship it ourselves if so.
+using Xilium.CefGlue;
+
+namespace Robust.Client.CEF
+{
+    // Register this with IoC.
+    // TODO CEF: think if making this inherit CefApp is a good idea...
+    // TODO CEF: A way to handle external window browsers...
+    [UsedImplicitly]
+    public partial class CefManager
+    {
+        private CefApp _app = default!;
+        private bool _initialized = false;
+
+        /// <summary>
+        ///     Call this to initialize CEF.
+        /// </summary>
+        public void Initialize()
+        {
+            DebugTools.Assert(!_initialized);
+
+            string subProcessName;
+            if (OperatingSystem.IsWindows())
+                subProcessName = "Robust.Client.CEF.exe";
+            else if (OperatingSystem.IsLinux())
+                subProcessName = "Robust.Client.CEF";
+            else
+                throw new NotSupportedException("Unsupported platform for CEF!");
+
+            var subProcessPath = PathHelpers.ExecutableRelativeFile(subProcessName);
+
+            var settings = new CefSettings()
+            {
+                WindowlessRenderingEnabled = true, // So we can render to our UI controls.
+                ExternalMessagePump = false, // Unsure, honestly. TODO CEF: Research this?
+                NoSandbox = true, // Not disabling the sandbox crashes CEF.
+                BrowserSubprocessPath = subProcessPath,
+                LocalesDirPath = Path.Combine(PathHelpers.GetExecutableDirectory(), "locales"),
+                ResourcesDirPath = PathHelpers.GetExecutableDirectory(),
+                RemoteDebuggingPort = 9222
+            };
+
+            Logger.Info($"CEF Version: {CefRuntime.ChromeVersion}");
+
+            // --------------------------- README --------------------------------------------------
+            // By the way! You're gonna need the CEF binaries in your client's bin folder.
+            // More specifically, version cef_binary_91.1.21+g9dd45fe+chromium-91.0.4472.114
+            // https://cef-builds.spotifycdn.com/cef_binary_91.1.21%2Bg9dd45fe%2Bchromium-91.0.4472.114_windows64_minimal.tar.bz2
+            // https://cef-builds.spotifycdn.com/cef_binary_91.1.21%2Bg9dd45fe%2Bchromium-91.0.4472.114_linux64_minimal.tar.bz2
+            // Here's how to get it to work:
+            // 1. Copy all the contents of "Release" to the bin folder.
+            // 2. Copy all the contents of "Resources" to the bin folder.
+            // Supposedly, you should just need libcef.so in Release and icudtl.dat in Resources...
+            // The rest might be optional.
+            // Maybe. Good luck! If you get odd crashes with no info and a weird exit code, use GDB!
+            // -------------------------------------------------------------------------------------
+
+            _app = new RobustCefApp();
+
+            // We pass no main arguments...
+            CefRuntime.Initialize(new CefMainArgs(null), settings, _app, IntPtr.Zero);
+
+            // TODO CEF: After this point, debugging breaks. No, literally. My client crashes but ONLY with the debugger.
+            // I have tried using the DEBUG and RELEASE versions of libcef.so, stripped or non-stripped...
+            // And nothing seemed to work. Odd.
+
+            _initialized = true;
+        }
+
+        public void CheckInitialized()
+        {
+            if (!_initialized)
+                throw new InvalidOperationException("CefManager has not been initialized!");
+        }
+
+        /// <summary>
+        ///     Needs to be called regularly for CEF to keep working.
+        /// </summary>
+        public void Update()
+        {
+            DebugTools.Assert(_initialized);
+
+            // Calling this makes CEF do its work, without using its own update loop.
+            CefRuntime.DoMessageLoopWork();
+        }
+
+        /// <summary>
+        ///     Call before program shutdown.
+        /// </summary>
+        public void Shutdown()
+        {
+            DebugTools.Assert(_initialized);
+
+            CefRuntime.Shutdown();
+        }
+    }
+}

Robust.Client.CEF/IBrowserControl.cs

@@ -0,0 +1,48 @@
+using System;
+
+namespace Robust.Client.CEF
+{
+    public interface IBrowserControl
+    {
+        /// <summary>
+        ///     Current URL of the browser. Set to load a new page.
+        /// </summary>
+        string Url { get; set; }
+
+        /// <summary>
+        ///     Whether the browser is currently loading a page.
+        /// </summary>
+        bool IsLoading { get; }
+
+        /// <summary>
+        ///     Stops loading the current page.
+        /// </summary>
+        void StopLoad();
+
+        /// <summary>
+        ///     Reload the current page.
+        /// </summary>
+        void Reload();
+
+        /// <summary>
+        ///     Navigate back.
+        /// </summary>
+        /// <returns>Whether the browser could navigate back.</returns>
+        bool GoBack();
+
+        /// <summary>
+        ///     Navigate forward.
+        /// </summary>
+        /// <returns>Whether the browser could navigate forward.</returns>
+        bool GoForward();
+
+        /// <summary>
+        ///     Execute arbitrary JavaScript on the current page.
+        /// </summary>
+        /// <param name="code">JavaScript code.</param>
+        void ExecuteJavaScript(string code);
+
+        void AddResourceRequestHandler(Action<RequestHandlerContext> handler);
+        void RemoveResourceRequestHandler(Action<RequestHandlerContext> handler);
+    }
+}

Robust.Client.CEF/IBrowserWindow.cs

@@ -0,0 +1,9 @@
+using System;
+
+namespace Robust.Client.CEF
+{
+    public interface IBrowserWindow : IBrowserControl, IDisposable
+    {
+        bool Closed { get; }
+    }
+}

Robust.Client.CEF/ImageBuffer.cs

@@ -0,0 +1,42 @@
+using System;
+using Robust.Client.UserInterface;
+using Robust.Client.Utility;
+using Robust.Shared.Maths;
+using SixLabors.ImageSharp;
+using SixLabors.ImageSharp.PixelFormats;
+using Xilium.CefGlue;
+
+namespace Robust.Client.CEF
+{
+    internal sealed class ImageBuffer
+    {
+        private readonly Control _control;
+
+        public ImageBuffer(Control control)
+        {
+            _control = control;
+        }
+
+        public Image<Bgra32> Buffer { get; private set; } = new(1, 1);
+
+        public unsafe void UpdateBuffer(int width, int height, IntPtr buffer, CefRectangle dirtyRect)
+        {
+            if (width != Buffer.Width || height != Buffer.Height)
+                UpdateSize(width, height);
+
+            var span = new ReadOnlySpan<Bgra32>((void*) buffer, width * height);
+
+            ImageSharpExt.Blit(
+                span,
+                width,
+                UIBox2i.FromDimensions(dirtyRect.X, dirtyRect.Y, dirtyRect.Width, dirtyRect.Height),
+                Buffer,
+                (dirtyRect.X, dirtyRect.Y));
+        }
+
+        private void UpdateSize(int width, int height)
+        {
+            Buffer = new Image<Bgra32>(width, height);
+        }
+    }
+}

Robust.Client.CEF/Program.cs

@@ -0,0 +1,33 @@
+using System;
+using Xilium.CefGlue;
+
+namespace Robust.Client.CEF
+{
+    public static class Program
+    {
+        // This was supposed to be the main entry for the subprocess program... It doesn't work.
+        public static int Main(string[] args)
+        {
+            // This is a workaround for this to work on UNIX.
+            var argv = args;
+            if (CefRuntime.Platform != CefRuntimePlatform.Windows)
+            {
+                argv = new string[args.Length + 1];
+                Array.Copy(args, 0, argv, 1, args.Length);
+                argv[0] = "-";
+            }
+
+            var mainArgs = new CefMainArgs(argv);
+
+            // This will block executing until the subprocess is shut down.
+            var code = CefRuntime.ExecuteProcess(mainArgs, null, IntPtr.Zero);
+
+            if (code != 0)
+            {
+                System.Console.WriteLine($"CEF Subprocess exited unsuccessfully with exit code {code}! Arguments: {string.Join(' ', argv)}");
+            }
+
+            return code;
+        }
+    }
+}

Robust.Client.CEF/RequestHandlerContext.cs

@@ -0,0 +1,56 @@
+using System;
+using System.IO;
+using System.Net;
+using Xilium.CefGlue;
+
+namespace Robust.Client.CEF
+{
+    public sealed class RequestHandlerContext
+    {
+        internal readonly CefRequest CefRequest;
+
+        public bool IsNavigation { get; }
+        public bool IsDownload { get; }
+        public string RequestInitiator { get; }
+
+        public string Url => CefRequest.Url;
+        public string Method => CefRequest.Method;
+
+        public bool IsHandled { get; private set; }
+
+        public bool IsCancelled { get; private set; }
+
+        internal IRequestResult? Result { get; private set; }
+
+        internal RequestHandlerContext(
+            bool isNavigation,
+            bool isDownload,
+            string requestInitiator,
+            CefRequest cefRequest)
+        {
+            CefRequest = cefRequest;
+            IsNavigation = isNavigation;
+            IsDownload = isDownload;
+            RequestInitiator = requestInitiator;
+        }
+
+        public void DoCancel()
+        {
+            CheckNotHandled();
+
+            IsHandled = true;
+            IsCancelled = true;
+        }
+
+        public void DoRespondStream(Stream stream, string contentType, HttpStatusCode code = HttpStatusCode.OK)
+        {
+            Result = new RequestResultStream(stream, contentType, code);
+        }
+
+        private void CheckNotHandled()
+        {
+            if (IsHandled)
+                throw new InvalidOperationException("Request has already been handled");
+        }
+    }
+}

Robust.Client.CEF/RequestResults.cs

@@ -0,0 +1,93 @@
+using System;
+using System.IO;
+using System.Net;
+using Xilium.CefGlue;
+
+namespace Robust.Client.CEF
+{
+    internal interface IRequestResult
+    {
+        CefResourceHandler MakeHandler();
+    }
+
+    internal sealed class RequestResultStream : IRequestResult
+    {
+        private readonly Stream _stream;
+        private readonly HttpStatusCode _code;
+        private readonly string _contentType;
+
+        public RequestResultStream(Stream stream, string contentType, HttpStatusCode code)
+        {
+            _stream = stream;
+            _code = code;
+            _contentType = contentType;
+        }
+
+        public CefResourceHandler MakeHandler()
+        {
+            return new Handler(_stream, _contentType, _code);
+        }
+
+        private sealed class Handler : CefResourceHandler
+        {
+            // TODO: async
+            // TODO: exception handling
+
+            private readonly Stream _stream;
+            private readonly HttpStatusCode _code;
+            private readonly string _contentType;
+
+            public Handler(Stream stream, string contentType, HttpStatusCode code)
+            {
+                _stream = stream;
+                _code = code;
+                _contentType = contentType;
+            }
+
+            protected override bool Open(CefRequest request, out bool handleRequest, CefCallback callback)
+            {
+                handleRequest = true;
+                return true;
+            }
+
+            protected override void GetResponseHeaders(CefResponse response, out long responseLength, out string? redirectUrl)
+            {
+                response.Status = (int) _code;
+                response.StatusText = _code.ToString();
+                response.MimeType = _contentType;
+
+                if (_stream.CanSeek)
+                    responseLength = _stream.Length;
+                else
+                    responseLength = -1;
+
+                redirectUrl = default;
+            }
+
+            protected override bool Skip(long bytesToSkip, out long bytesSkipped, CefResourceSkipCallback callback)
+            {
+                if (!_stream.CanSeek)
+                {
+                    bytesSkipped = -2;
+                    return false;
+                }
+
+                bytesSkipped = _stream.Seek(bytesToSkip, SeekOrigin.Begin);
+                return true;
+            }
+
+            protected override unsafe bool Read(IntPtr dataOut, int bytesToRead, out int bytesRead, CefResourceReadCallback callback)
+            {
+                var byteSpan = new Span<byte>((void*) dataOut, bytesToRead);
+
+                bytesRead = _stream.Read(byteSpan);
+
+                return bytesRead != 0;
+            }
+
+            protected override void Cancel()
+            {
+            }
+        }
+    }
+}

Robust.Client.CEF/Robust.Client.CEF.csproj

@@ -0,0 +1,25 @@
+<Project Sdk="Microsoft.NET.Sdk">
+    <Import Project="..\MSBuild\Robust.Properties.targets" />
+    <Import Project="..\MSBuild\Robust.Engine.props" />
+    <PropertyGroup>
+        <TargetFramework>net5.0</TargetFramework>
+        <PlatformTarget>x64</PlatformTarget>
+        <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+        <OutputType>WinExe</OutputType>
+    </PropertyGroup>
+
+    <Import Project="..\MSBuild\Robust.DefineConstants.targets" />
+    <Target Name="RobustAfterBuild" AfterTargets="Build" />
+    <Import Project="..\MSBuild\Robust.Engine.targets" />
+
+    <ItemGroup>
+      <PackageReference Include="JetBrains.Annotations" Version="2020.3.0" />
+      <PackageReference Include="System.Drawing.Common" Version="5.0.2" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\cefglue\CefGlue\CefGlue.csproj" />
+      <ProjectReference Include="..\Robust.Client\Robust.Client.csproj" />
+    </ItemGroup>
+
+</Project>

Robust.Client.CEF/RobustCefApp.cs

@@ -0,0 +1,48 @@
+using System;
+using Robust.Shared.IoC;
+using Robust.Shared.Log;
+using Xilium.CefGlue;
+
+namespace Robust.Client.CEF
+{
+    internal class RobustCefApp : CefApp
+    {
+        private readonly BrowserProcessHandler _browserProcessHandler = new();
+        private readonly RenderProcessHandler _renderProcessHandler = new();
+
+        protected override CefBrowserProcessHandler GetBrowserProcessHandler()
+        {
+            return _browserProcessHandler;
+        }
+
+        protected override CefRenderProcessHandler GetRenderProcessHandler()
+        {
+            return _renderProcessHandler;
+        }
+
+        protected override void OnBeforeCommandLineProcessing(string processType, CefCommandLine commandLine)
+        {
+            // Disable zygote on Linux.
+            commandLine.AppendSwitch("--no-zygote");
+
+            //commandLine.AppendSwitch("--disable-gpu");
+            //commandLine.AppendSwitch("--disable-gpu-compositing");
+            //commandLine.AppendSwitch("--in-process-gpu");
+
+            commandLine.AppendSwitch("disable-threaded-scrolling", "1");
+            commandLine.AppendSwitch("disable-features", "TouchpadAndWheelScrollLatching,AsyncWheelEvents");
+
+            if(IoCManager.Instance != null)
+                Logger.Debug($"{commandLine}");
+        }
+
+        private class BrowserProcessHandler : CefBrowserProcessHandler
+        {
+        }
+
+        // TODO CEF: Research - Is this even needed?
+        private class RenderProcessHandler : CefRenderProcessHandler
+        {
+        }
+    }
+}

Robust.Client.CEF/RobustCefClient.cs

@@ -0,0 +1,23 @@
+using Xilium.CefGlue;
+
+namespace Robust.Client.CEF
+{
+    // Simple CEF client.
+    internal class RobustCefClient : CefClient
+    {
+        private readonly CefRenderHandler _renderHandler;
+        private readonly CefRequestHandler _requestHandler;
+        private readonly CefLoadHandler _loadHandler;
+
+        internal RobustCefClient(CefRenderHandler handler, CefRequestHandler requestHandler, CefLoadHandler loadHandler)
+        {
+            _renderHandler = handler;
+            _requestHandler = requestHandler;
+            _loadHandler = loadHandler;
+        }
+
+        protected override CefRenderHandler GetRenderHandler() => _renderHandler;
+        protected override CefRequestHandler GetRequestHandler() => _requestHandler;
+        protected override CefLoadHandler GetLoadHandler() => _loadHandler;
+    }
+}

Robust.Client.CEF/RobustLoadHandler.cs

@@ -0,0 +1,17 @@
+using Xilium.CefGlue;
+
+namespace Robust.Client.CEF
+{
+    public sealed class RobustLoadHandler : CefLoadHandler
+    {
+        protected override void OnLoadStart(CefBrowser browser, CefFrame frame, CefTransitionType transitionType)
+        {
+            base.OnLoadStart(browser, frame, transitionType);
+        }
+
+        protected override void OnLoadEnd(CefBrowser browser, CefFrame frame, int httpStatusCode)
+        {
+            base.OnLoadEnd(browser, frame, httpStatusCode);
+        }
+    }
+}

Robust.Client.CEF/RobustRequestHandler.cs

@@ -0,0 +1,128 @@
+using System;
+using System.Collections.Generic;
+using Robust.Shared.Log;
+using Xilium.CefGlue;
+
+namespace Robust.Client.CEF
+{
+    internal sealed class RobustRequestHandler : CefRequestHandler
+    {
+        private readonly ISawmill _sawmill;
+        private readonly List<Action<RequestHandlerContext>> _resourceRequestHandlers = new();
+        private readonly List<Action<BeforeBrowseContext>> _beforeBrowseHandlers = new();
+
+        public RobustRequestHandler(ISawmill sawmill)
+        {
+            _sawmill = sawmill;
+        }
+
+        public void AddResourceRequestHandler(Action<RequestHandlerContext> handler)
+        {
+            lock (_resourceRequestHandlers)
+            {
+                _resourceRequestHandlers.Add(handler);
+            }
+        }
+
+        public void RemoveResourceRequestHandler(Action<RequestHandlerContext> handler)
+        {
+            lock (_resourceRequestHandlers)
+            {
+                _resourceRequestHandlers.Remove(handler);
+            }
+        }
+
+        public void AddBeforeBrowseHandler(Action<BeforeBrowseContext> handler)
+        {
+            lock (_beforeBrowseHandlers)
+            {
+                _beforeBrowseHandlers.Add(handler);
+            }
+        }
+
+        public void RemoveBeforeBrowseHandler(Action<BeforeBrowseContext> handler)
+        {
+            lock (_beforeBrowseHandlers)
+            {
+                _beforeBrowseHandlers.Remove(handler);
+            }
+        }
+
+        protected override CefResourceRequestHandler? GetResourceRequestHandler(
+            CefBrowser browser,
+            CefFrame frame,
+            CefRequest request,
+            bool isNavigation,
+            bool isDownload,
+            string requestInitiator,
+            ref bool disableDefaultHandling)
+        {
+            lock (_resourceRequestHandlers)
+            {
+                _sawmill.Debug($"HANDLING REQUEST: {request.Url}");
+
+                var context = new RequestHandlerContext(isNavigation, isDownload, requestInitiator, request);
+
+                foreach (var handler in _resourceRequestHandlers)
+                {
+                    handler(context);
+
+                    if (context.IsHandled)
+                        disableDefaultHandling = true;
+
+                    if (context.IsCancelled)
+                        return null;
+
+                    if (context.Result != null)
+                        return new WrapReaderResourceHandler(context.Result.MakeHandler());
+                }
+            }
+
+            return null;
+        }
+
+        protected override bool OnBeforeBrowse(CefBrowser browser, CefFrame frame, CefRequest request, bool userGesture, bool isRedirect)
+        {
+            lock (_beforeBrowseHandlers)
+            {
+                var context = new BeforeBrowseContext(isRedirect, userGesture, request);
+
+                foreach (var handler in _beforeBrowseHandlers)
+                {
+                    handler(context);
+
+                    if (context.IsCancelled)
+                        return true;
+                }
+            }
+
+            return false;
+        }
+
+        private sealed class WrapReaderResourceHandler : CefResourceRequestHandler
+        {
+            private readonly CefResourceHandler _handler;
+
+            public WrapReaderResourceHandler(CefResourceHandler handler)
+            {
+                _handler = handler;
+            }
+
+            protected override CefCookieAccessFilter? GetCookieAccessFilter(
+                CefBrowser browser,
+                CefFrame frame,
+                CefRequest request)
+            {
+                return null;
+            }
+
+            protected override CefResourceHandler GetResourceHandler(
+                CefBrowser browser,
+                CefFrame frame,
+                CefRequest request)
+            {
+                return _handler;
+            }
+        }
+    }
+}

Robust.Client.Injectors/CompileRobustXamlTask.cs

@@ -0,0 +1,101 @@
+using System;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using Microsoft.Build.Framework;
+
+namespace Robust.Build.Tasks
+{
+    /// <summary>
+    /// Based on https://github.com/AvaloniaUI/Avalonia/blob/c85fa2b9977d251a31886c2534613b4730fbaeaf/src/Avalonia.Build.Tasks/CompileAvaloniaXamlTask.cs
+    /// </summary>
+    public class CompileRobustXamlTask : ITask
+    {
+        public bool Execute()
+        {
+            //Debugger.Launch();
+            OutputPath = OutputPath ?? AssemblyFile;
+            var outputPdb = GetPdbPath(OutputPath);
+            var input = AssemblyFile;
+            var inputPdb = GetPdbPath(input);
+            // Make a copy and delete the original file to prevent MSBuild from thinking that everything is OK
+            if (OriginalCopyPath != null)
+            {
+                File.Copy(AssemblyFile, OriginalCopyPath, true);
+                input = OriginalCopyPath;
+                File.Delete(AssemblyFile);
+
+                if (File.Exists(inputPdb))
+                {
+                    var copyPdb = GetPdbPath(OriginalCopyPath);
+                    File.Copy(inputPdb, copyPdb, true);
+                    File.Delete(inputPdb);
+                    inputPdb = copyPdb;
+                }
+            }
+
+            var msg = $"CompileRobustXamlTask -> AssemblyFile:{AssemblyFile}, ProjectDirectory:{ProjectDirectory}, OutputPath:{OutputPath}";
+            BuildEngine.LogMessage(msg, MessageImportance.High);
+
+            var res = XamlCompiler.Compile(BuildEngine, input,
+                File.ReadAllLines(ReferencesFilePath).Where(l => !string.IsNullOrWhiteSpace(l)).ToArray(),
+                ProjectDirectory, OutputPath,
+                (SignAssembly && !DelaySign) ? AssemblyOriginatorKeyFile : null);
+            if (!res.success)
+                return false;
+            if (!res.writtentofile)
+            {
+                File.Copy(input, OutputPath, true);
+                if(File.Exists(inputPdb))
+                    File.Copy(inputPdb, outputPdb, true);
+            }
+
+            if (!string.IsNullOrEmpty(UpdateBuildIndicator))
+            {
+                if (!File.Exists(UpdateBuildIndicator))
+                {
+                    File.Create(UpdateBuildIndicator).Dispose();
+                }
+                else
+                {
+                    File.SetLastWriteTime(UpdateBuildIndicator, DateTime.Now);
+                }
+            }
+
+            return true;
+        }
+
+        [Required]
+        public string ReferencesFilePath { get; set; }
+
+        [Required]
+        public string ProjectDirectory { get; set; }
+
+        [Required]
+        public string AssemblyFile { get; set; }
+
+        [Required]
+        public string OriginalCopyPath { get; set; }
+
+        public string OutputPath { get; set; }
+        public string UpdateBuildIndicator { get; set; }
+
+        public string AssemblyOriginatorKeyFile { get; set; }
+        public bool SignAssembly { get; set; }
+        public bool DelaySign { get; set; }
+
+        // shamelessly copied from avalonia
+        string GetPdbPath(string p)
+        {
+            var d = Path.GetDirectoryName(p);
+            var f = Path.GetFileNameWithoutExtension(p);
+            var rv = f + ".pdb";
+            if (d != null)
+                rv = Path.Combine(d, rv);
+            return rv;
+        }
+
+        public IBuildEngine BuildEngine { get; set; }
+        public ITaskHost HostObject { get; set; }
+    }
+}

Robust.Client.Injectors/Extensions.cs

@@ -0,0 +1,16 @@
+using Microsoft.Build.Framework;
+
+namespace Robust.Build.Tasks
+{
+    /// <summary>
+    /// Taken from https://github.com/AvaloniaUI/Avalonia/blob/c85fa2b9977d251a31886c2534613b4730fbaeaf/src/Avalonia.Build.Tasks/Extensions.cs
+    /// </summary>
+    public static class Extensions
+    {
+        //shamefully copied from avalonia
+        public static void LogMessage(this IBuildEngine engine, string message, MessageImportance imp)
+        {
+            engine.LogMessageEvent(new BuildMessageEventArgs(message, "", "Avalonia", imp));
+        }
+    }
+}

Robust.Client.Injectors/MathParsing.cs

@@ -0,0 +1,37 @@
+using System.Linq;
+using Pidgin;
+using static Pidgin.Parser;
+
+
+namespace Robust.Build.Tasks
+{
+    public static class MathParsing
+    {
+        public static Parser<char, float> Single { get; } = Real.Select(c => (float) c);
+
+        public static Parser<char, float> Single1 { get; }
+            = Single.Between(SkipWhitespaces);
+
+        public static Parser<char, (float, float)> Single2 { get; }
+            = Single.Before(SkipWhitespaces).Repeat(2).Select(e =>
+            {
+                var arr = e.ToArray();
+                return (arr[0], arr[1]);
+            });
+
+        public static Parser<char, (float, float, float, float)> Single4 { get; }
+            = Single.Before(SkipWhitespaces).Repeat(4).Select(e =>
+            {
+                var arr = e.ToArray();
+                return (arr[0], arr[1], arr[2], arr[3]);
+            });
+
+        public static Parser<char, float[]> Thickness { get; }
+            = SkipWhitespaces.Then(
+                OneOf(
+                    Try(Single4.Select(c => new[] {c.Item1, c.Item2, c.Item3, c.Item4})),
+                    Try(Single2.Select(c => new[] {c.Item1, c.Item2})),
+                    Try(Single1.Select(c => new[] {c}))
+                ));
+    }
+}

Robust.Client.Injectors/Program.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Collections;
+using System.IO;
+using Microsoft.Build.Framework;
+
+namespace Robust.Build.Tasks
+{
+    /// <summary>
+    /// Based on https://github.com/AvaloniaUI/Avalonia/blob/c85fa2b9977d251a31886c2534613b4730fbaeaf/src/Avalonia.Build.Tasks/Program.cs
+    /// </summary>
+    class Program
+    {
+        static int Main(string[] args)
+        {
+            if (args.Length != 3)
+            {
+                Console.Error.WriteLine("expected: input references output");
+                return 1;
+            }
+
+            return new CompileRobustXamlTask
+            {
+                AssemblyFile = args[0],
+                ReferencesFilePath = args[1],
+                OutputPath = args[2],
+                BuildEngine = new ConsoleBuildEngine(),
+                ProjectDirectory = Directory.GetCurrentDirectory()
+            }.Execute() ? 0 : 2;
+        }
+    }
+
+    //formatted according to https://github.com/dotnet/msbuild/blob/main/src/Shared/CanonicalError.cs#L57
+    class ConsoleBuildEngine : IBuildEngine
+    {
+        public void LogErrorEvent(BuildErrorEventArgs e)
+        {
+            Console.WriteLine($"{e.File} ({e.LineNumber},{e.ColumnNumber},{e.EndLineNumber},{e.EndColumnNumber}): XAMLIL ERROR {e.Code}: {e.Message}");
+        }
+
+        public void LogWarningEvent(BuildWarningEventArgs e)
+        {
+            Console.WriteLine($"{e.File} ({e.LineNumber},{e.ColumnNumber},{e.EndLineNumber},{e.EndColumnNumber}): XAMLIL WARNING {e.Code}: {e.Message}");
+        }
+
+        public void LogMessageEvent(BuildMessageEventArgs e)
+        {
+            Console.WriteLine($"{e.File} ({e.LineNumber},{e.ColumnNumber},{e.EndLineNumber},{e.EndColumnNumber}): XAMLIL MESSAGE {e.Code}: {e.Message}");
+        }
+
+        public void LogCustomEvent(CustomBuildEventArgs e)
+        {
+            Console.WriteLine(e.Message);
+        }
+
+        public bool BuildProjectFile(string projectFileName, string[] targetNames, IDictionary globalProperties,
+            IDictionary targetOutputs) => throw new NotSupportedException();
+
+        public bool ContinueOnError { get; }
+        public int LineNumberOfTaskNode { get; }
+        public int ColumnNumberOfTaskNode { get; }
+        public string ProjectFileOfTaskNode { get; }
+    }
+}

Robust.Client.Injectors/RXamlColorAstNode.cs

@@ -0,0 +1,32 @@
+using System.Reflection.Emit;
+using XamlX.Ast;
+using XamlX.Emit;
+using XamlX.IL;
+using XamlX.TypeSystem;
+
+namespace Robust.Build.Tasks
+{
+    internal class RXamlColorAstNode
+        : XamlAstNode, IXamlAstValueNode, IXamlAstILEmitableNode
+    {
+        private readonly IXamlMethod _method;
+        private readonly string _color;
+
+        public RXamlColorAstNode(IXamlLineInfo lineInfo, RXamlWellKnownTypes types, string color) : base(lineInfo)
+        {
+            _color = color;
+            Type = new XamlAstClrTypeReference(lineInfo, types.Color, false);
+            _method = types.ColorFromXaml;
+        }
+
+        public IXamlAstTypeReference Type { get; }
+
+        public XamlILNodeEmitResult Emit(XamlEmitContext<IXamlILEmitter, XamlILNodeEmitResult> context, IXamlILEmitter codeGen)
+        {
+            codeGen.Ldstr(_color);
+            codeGen.EmitCall(_method);
+
+            return XamlILNodeEmitResult.Type(0, Type.GetClrType());
+        }
+    }
+}

Robust.Client.Injectors/RXamlVecLikeConstAstNode.cs

@@ -0,0 +1,93 @@
+using System;
+using System.Linq;
+using System.Reflection.Emit;
+using XamlX.Ast;
+using XamlX.Emit;
+using XamlX.IL;
+using XamlX.TypeSystem;
+
+namespace Robust.Build.Tasks
+{
+    public abstract class RXamlVecLikeConstAstNode<T>
+        : XamlAstNode, IXamlAstValueNode, IXamlAstILEmitableNode
+        where T : unmanaged
+    {
+        private readonly IXamlConstructor _constructor;
+        protected readonly T[] Values;
+
+        public RXamlVecLikeConstAstNode(
+            IXamlLineInfo lineInfo,
+            IXamlType type, IXamlConstructor constructor,
+            IXamlType componentType, T[] values)
+            : base(lineInfo)
+        {
+            _constructor = constructor;
+            Values = values;
+
+            var @params = constructor.Parameters;
+
+            if (@params.Count != values.Length)
+                throw new ArgumentException("Invalid amount of parameters");
+
+            if (@params.Any(c => c != componentType))
+                throw new ArgumentException("Invalid constructor: not all parameters match component type");
+
+            Type = new XamlAstClrTypeReference(lineInfo, type, false);
+        }
+
+        public IXamlAstTypeReference Type { get; }
+
+        public virtual XamlILNodeEmitResult Emit(
+            XamlEmitContext<IXamlILEmitter, XamlILNodeEmitResult> context,
+            IXamlILEmitter codeGen)
+        {
+            codeGen.Newobj(_constructor);
+
+            return XamlILNodeEmitResult.Type(0, Type.GetClrType());
+        }
+    }
+
+    public sealed class RXamlSingleVecLikeConstAstNode : RXamlVecLikeConstAstNode<float>
+    {
+        public RXamlSingleVecLikeConstAstNode(
+            IXamlLineInfo lineInfo,
+            IXamlType type, IXamlConstructor constructor,
+            IXamlType componentType, float[] values)
+            : base(lineInfo, type, constructor, componentType, values)
+        {
+        }
+
+        public override XamlILNodeEmitResult Emit(XamlEmitContext<IXamlILEmitter, XamlILNodeEmitResult> context,
+            IXamlILEmitter codeGen)
+        {
+            foreach (var value in Values)
+            {
+                codeGen.Emit(OpCodes.Ldc_R4, value);
+            }
+
+            return base.Emit(context, codeGen);
+        }
+    }
+
+    public sealed class RXamlInt32VecLikeConstAstNode : RXamlVecLikeConstAstNode<int>
+    {
+        public RXamlInt32VecLikeConstAstNode(
+            IXamlLineInfo lineInfo,
+            IXamlType type, IXamlConstructor constructor,
+            IXamlType componentType, int[] values)
+            : base(lineInfo, type, constructor, componentType, values)
+        {
+        }
+
+        public override XamlILNodeEmitResult Emit(XamlEmitContext<IXamlILEmitter, XamlILNodeEmitResult> context,
+            IXamlILEmitter codeGen)
+        {
+            foreach (var value in Values)
+            {
+                codeGen.Emit(OpCodes.Ldc_I4, value);
+            }
+
+            return base.Emit(context, codeGen);
+        }
+    }
+}

Robust.Client.Injectors/RXamlWellKnownTypes.cs

@@ -0,0 +1,58 @@
+using System.Linq;
+using XamlX.Transform;
+using XamlX.TypeSystem;
+
+namespace Robust.Build.Tasks
+{
+    class RXamlWellKnownTypes
+    {
+        public XamlTypeWellKnownTypes XamlIlTypes { get; }
+        public IXamlType Single { get; }
+        public IXamlType Int32 { get; }
+        public IXamlType Vector2 { get; }
+        public IXamlConstructor Vector2ConstructorFull { get; }
+        public IXamlType Vector2i { get; }
+        public IXamlConstructor Vector2iConstructorFull { get; }
+        public IXamlType Thickness { get; }
+        public IXamlConstructor ThicknessConstructorFull { get; }
+        public IXamlType Color { get; }
+        public IXamlMethod ColorFromXaml { get; }
+
+        public RXamlWellKnownTypes(TransformerConfiguration cfg)
+        {
+            var ts = cfg.TypeSystem;
+            XamlIlTypes = cfg.WellKnownTypes;
+            Single = ts.GetType("System.Single");
+            Int32 = ts.GetType("System.Int32");
+
+            (Vector2, Vector2ConstructorFull) = GetNumericTypeInfo("Robust.Shared.Maths.Vector2", Single, 2);
+            (Vector2i, Vector2iConstructorFull) = GetNumericTypeInfo("Robust.Shared.Maths.Vector2i", Int32, 2);
+            (Thickness, ThicknessConstructorFull) = GetNumericTypeInfo("Robust.Shared.Maths.Thickness", Single, 4);
+
+            (IXamlType, IXamlConstructor) GetNumericTypeInfo(string name, IXamlType componentType, int componentCount)
+            {
+                var type = cfg.TypeSystem.GetType(name);
+                var ctor = type.GetConstructor(Enumerable.Repeat(componentType, componentCount).ToList());
+
+                return (type, ctor);
+            }
+
+            Color = cfg.TypeSystem.GetType("Robust.Shared.Maths.Color");
+            ColorFromXaml = Color.GetMethod(new FindMethodMethodSignature("FromXaml", Color, XamlIlTypes.String)
+            {
+                IsStatic = true
+            });
+        }
+    }
+
+    static class RXamlWellKnownTypesExtensions
+    {
+        public static RXamlWellKnownTypes GetRobustTypes(this AstTransformationContext ctx)
+        {
+            if (ctx.TryGetItem<RXamlWellKnownTypes>(out var rv))
+                return rv;
+            ctx.SetItem(rv = new RXamlWellKnownTypes(ctx.Configuration));
+            return rv;
+        }
+    }
+}

Robust.Client.Injectors/Robust.Client.Injectors.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>netstandard2.0</TargetFramework>
+        <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <PackageReference Include="Microsoft.Build.Framework" Version="16.8.0" />
+      <PackageReference Include="Mono.Cecil" Version="0.11.3" />
+      <PackageReference Include="Pidgin" Version="2.5.0" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\XamlX\src\XamlX.IL.Cecil\XamlX.IL.Cecil.csproj" />
+    </ItemGroup>
+</Project>

Robust.Client.Injectors/RobustXamlILCompiler.cs

@@ -0,0 +1,225 @@
+using System.Diagnostics;
+using System.Linq;
+using XamlX;
+using XamlX.Ast;
+using XamlX.Emit;
+using XamlX.IL;
+using XamlX.Transform;
+using XamlX.TypeSystem;
+
+namespace Robust.Build.Tasks
+{
+    /// <summary>
+    /// Emitters & Transformers based on:
+    /// - https://github.com/AvaloniaUI/Avalonia/blob/c85fa2b9977d251a31886c2534613b4730fbaeaf/src/Markup/Avalonia.Markup.Xaml.Loader/CompilerExtensions/Transformers/AvaloniaXamlIlRootObjectScopeTransformer.cs
+    /// - https://github.com/AvaloniaUI/Avalonia/blob/c85fa2b9977d251a31886c2534613b4730fbaeaf/src/Markup/Avalonia.Markup.Xaml.Loader/CompilerExtensions/Transformers/AddNameScopeRegistration.cs
+    /// - https://github.com/AvaloniaUI/Avalonia/blob/afb8ae6f3c517dae912729511483995b16cb31af/src/Markup/Avalonia.Markup.Xaml.Loader/CompilerExtensions/Transformers/IgnoredDirectivesTransformer.cs
+    /// </summary>
+    public class RobustXamlILCompiler : XamlILCompiler
+    {
+        public RobustXamlILCompiler(TransformerConfiguration configuration, XamlLanguageEmitMappings<IXamlILEmitter, XamlILNodeEmitResult> emitMappings, bool fillWithDefaults) : base(configuration, emitMappings, fillWithDefaults)
+        {
+            Transformers.Insert(0, new IgnoredDirectivesTransformer());
+
+            Transformers.Add(new AddNameScopeRegistration());
+            Transformers.Add(new RobustMarkRootObjectScopeNode());
+
+            Emitters.Add(new AddNameScopeRegistration.Emitter());
+            Emitters.Add(new RobustMarkRootObjectScopeNode.Emitter());
+        }
+
+        class AddNameScopeRegistration : IXamlAstTransformer
+        {
+            public IXamlAstNode Transform(AstTransformationContext context, IXamlAstNode node)
+            {
+                if (node is XamlPropertyAssignmentNode pa)
+                {
+                    if (pa.Property.Name == "Name"
+                        && pa.Property.DeclaringType.FullName == "Robust.Client.UserInterface.Control")
+                    {
+                        if (context.ParentNodes().FirstOrDefault() is XamlManipulationGroupNode mg
+                            && mg.Children.OfType<RobustNameScopeRegistrationXamlIlNode>().Any())
+                            return node;
+
+                        IXamlAstValueNode value = null;
+                        for (var c = 0; c < pa.Values.Count; c++)
+                            if (pa.Values[c].Type.GetClrType().Equals(context.Configuration.WellKnownTypes.String))
+                            {
+                                value = pa.Values[c];
+                                if (!(value is XamlAstTextNode))
+                                {
+                                    var local = new XamlAstCompilerLocalNode(value);
+                                    // Wrap original in local initialization
+                                    pa.Values[c] = new XamlAstLocalInitializationNodeEmitter(value, value, local);
+                                    // Use local
+                                    value = local;
+                                }
+
+                                break;
+                            }
+
+                        if (value != null)
+                        {
+                            var objectType = context.ParentNodes().OfType<XamlAstConstructableObjectNode>().FirstOrDefault()?.Type.GetClrType();
+                            return new XamlManipulationGroupNode(pa)
+                            {
+                                Children =
+                                {
+                                    pa,
+                                    new RobustNameScopeRegistrationXamlIlNode(value, objectType)
+                                }
+                            };
+                        }
+                    }
+                    /*else if (pa.Property.CustomAttributes.Select(attr => attr.Type).Intersect(context.Configuration.TypeMappings.DeferredContentPropertyAttributes).Any())
+                    {
+                        pa.Values[pa.Values.Count - 1] =
+                            new NestedScopeMetadataNode(pa.Values[pa.Values.Count - 1]);
+                    }*/
+                }
+
+                return node;
+            }
+
+            class RobustNameScopeRegistrationXamlIlNode : XamlAstNode, IXamlAstManipulationNode
+            {
+                public IXamlAstValueNode Name { get; set; }
+                public IXamlType TargetType { get; }
+
+                public RobustNameScopeRegistrationXamlIlNode(IXamlAstValueNode name, IXamlType targetType) : base(name)
+                {
+                    TargetType = targetType;
+                    Name = name;
+                }
+
+                public override void VisitChildren(IXamlAstVisitor visitor)
+                    => Name = (IXamlAstValueNode)Name.Visit(visitor);
+            }
+
+            internal class Emitter : IXamlAstLocalsNodeEmitter<IXamlILEmitter, XamlILNodeEmitResult>
+            {
+                public XamlILNodeEmitResult Emit(IXamlAstNode node, XamlEmitContextWithLocals<IXamlILEmitter, XamlILNodeEmitResult> context, IXamlILEmitter codeGen)
+                {
+                    if (node is RobustNameScopeRegistrationXamlIlNode registration)
+                    {
+
+                        var scopeField = context.RuntimeContext.ContextType.Fields.First(f =>
+                            f.Name == XamlCompiler.ContextNameScopeFieldName);
+                        var namescopeRegisterFunction = context.Configuration.TypeSystem
+                            .FindType("Robust.Client.UserInterface.XAML.NameScope").Methods
+                            .First(m => m.Name == "Register");
+
+                        using (var targetLoc = context.GetLocalOfType(context.Configuration.TypeSystem.FindType("Robust.Client.UserInterface.Control")))
+                        {
+
+                            codeGen
+                                // var target = {pop}
+                                .Stloc(targetLoc.Local)
+                                // _context.NameScope.Register(Name, target)
+                                .Ldloc(context.ContextLocal)
+                                .Ldfld(scopeField);
+
+                            context.Emit(registration.Name, codeGen, registration.Name.Type.GetClrType());
+
+                            codeGen
+                                .Ldloc(targetLoc.Local)
+                                .EmitCall(namescopeRegisterFunction, true);
+                        }
+
+                        return XamlILNodeEmitResult.Void(1);
+                    }
+                    return default;
+                }
+            }
+        }
+
+        class RobustMarkRootObjectScopeNode : IXamlAstTransformer
+        {
+            public IXamlAstNode Transform(AstTransformationContext context, IXamlAstNode node)
+            {
+                if (!context.ParentNodes().Any()
+                    && node is XamlValueWithManipulationNode mnode)
+                {
+                    mnode.Manipulation = new XamlManipulationGroupNode(mnode,
+                        new[]
+                        {
+                            mnode.Manipulation,
+                            new HandleRootObjectScopeNode(mnode)
+                        });
+                }
+                return node;
+            }
+            class HandleRootObjectScopeNode : XamlAstNode, IXamlAstManipulationNode
+            {
+                public HandleRootObjectScopeNode(IXamlLineInfo lineInfo) : base(lineInfo)
+                {
+                }
+            }
+            internal class Emitter : IXamlILAstNodeEmitter
+            {
+                public XamlILNodeEmitResult Emit(IXamlAstNode node, XamlEmitContext<IXamlILEmitter, XamlILNodeEmitResult> context, IXamlILEmitter codeGen)
+                {
+                    if (!(node is HandleRootObjectScopeNode))
+                    {
+                        return null;
+                    }
+
+                    var controlType = context.Configuration.TypeSystem.FindType("Robust.Client.UserInterface.Control");
+
+                    var next = codeGen.DefineLabel();
+                    var dontAbsorb = codeGen.DefineLabel();
+                    var end = codeGen.DefineLabel();
+                    var contextScopeField = context.RuntimeContext.ContextType.Fields.First(f =>
+                        f.Name == XamlCompiler.ContextNameScopeFieldName);
+                    var controlNameScopeField = controlType.Fields.First(f => f.Name == "NameScope");
+                    var nameScopeType = context.Configuration.TypeSystem
+                        .FindType("Robust.Client.UserInterface.XAML.NameScope");
+                    var nameScopeCompleteMethod = nameScopeType.Methods.First(m => m.Name == "Complete");
+                    var nameScopeAbsorbMethod = nameScopeType.Methods.First(m => m.Name == "Absorb");
+                    using (var local = codeGen.LocalsPool.GetLocal(controlType))
+                    {
+                        codeGen
+                            .Isinst(controlType)
+                            .Dup()
+                            .Stloc(local.Local) //store control in local field
+                            .Brfalse(next) //if control is null, move to next (this should never happen but whatev, avalonia does it)
+                            .Ldloc(context.ContextLocal)
+                            .Ldfld(contextScopeField)
+                            .Ldloc(local.Local) //load control from local field
+                            .Ldfld(controlNameScopeField) //load namescope field from control
+                            .EmitCall(nameScopeAbsorbMethod, true)
+                            .Ldloc(local.Local) //load control
+                            .Ldloc(context.ContextLocal) //load contextObject
+                            .Ldfld(contextScopeField) //load namescope field from context obj
+                            .Stfld(controlNameScopeField) //store namescope field in control
+                            .MarkLabel(next)
+                            .Ldloc(context.ContextLocal)
+                            .Ldfld(contextScopeField)
+                            .EmitCall(nameScopeCompleteMethod, true); //set the namescope as complete
+                    }
+
+                    return XamlILNodeEmitResult.Void(1);
+                }
+            }
+        }
+
+        class IgnoredDirectivesTransformer : IXamlAstTransformer
+        {
+            public IXamlAstNode Transform(AstTransformationContext context, IXamlAstNode node)
+            {
+                if (node is XamlAstObjectNode astNode)
+                {
+                    astNode.Children.RemoveAll(n =>
+                        n is XamlAstXmlDirective dir &&
+                        dir.Namespace == XamlNamespaces.Xaml2006 &&
+                        (dir.Name == "Class" ||
+                         dir.Name == "Precompile" ||
+                         dir.Name == "FieldModifier" ||
+                         dir.Name == "ClassModifier"));
+                }
+
+                return node;
+            }
+        }
+    }
+}

Robust.Client.Injectors/XamlCompiler.Helpers.cs

@@ -0,0 +1,78 @@
+using System.Collections.Generic;
+using System.Linq;
+using Mono.Cecil;
+using Mono.Cecil.Cil;
+using Mono.Collections.Generic;
+using XamlX.TypeSystem;
+
+namespace Robust.Build.Tasks
+{
+    /// <summary>
+    /// Helpers taken from:
+    /// - https://github.com/AvaloniaUI/Avalonia/blob/c85fa2b9977d251a31886c2534613b4730fbaeaf/src/Avalonia.Build.Tasks/XamlCompilerTaskExecutor.cs
+    /// - https://github.com/AvaloniaUI/Avalonia/blob/c85fa2b9977d251a31886c2534613b4730fbaeaf/src/Avalonia.Build.Tasks/XamlCompilerTaskExecutor.Helpers.cs
+    /// </summary>
+    public partial class XamlCompiler
+    {
+        static bool CheckXamlName(IResource r) => r.Name.ToLowerInvariant().EndsWith(".xaml")
+                                                  || r.Name.ToLowerInvariant().EndsWith(".paml")
+                                                  || r.Name.ToLowerInvariant().EndsWith(".axaml");
+
+        private static bool MatchThisCall(Collection<Instruction> instructions, int idx)
+        {
+            var i = instructions[idx];
+            // A "normal" way of passing `this` to a static method:
+
+            // ldarg.0
+            // call void [Avalonia.Markup.Xaml]Avalonia.Markup.Xaml.AvaloniaXamlLoader::Load(object)
+
+            return i.OpCode == OpCodes.Ldarg_0 || (i.OpCode == OpCodes.Ldarg && i.Operand?.Equals(0) == true);
+        }
+
+        interface IResource : IFileSource
+        {
+            string Uri { get; }
+            string Name { get; }
+            void Remove();
+
+        }
+
+        interface IResourceGroup
+        {
+            string Name { get; }
+            IEnumerable<IResource> Resources { get; }
+        }
+
+        class EmbeddedResources : IResourceGroup
+        {
+            private readonly AssemblyDefinition _asm;
+            public string Name => "EmbeddedResource";
+
+            public IEnumerable<IResource> Resources => _asm.MainModule.Resources.OfType<EmbeddedResource>()
+                .Select(r => new WrappedResource(_asm, r)).ToList();
+
+            public EmbeddedResources(AssemblyDefinition asm)
+            {
+                _asm = asm;
+            }
+            class WrappedResource : IResource
+            {
+                private readonly AssemblyDefinition _asm;
+                private readonly EmbeddedResource _res;
+
+                public WrappedResource(AssemblyDefinition asm, EmbeddedResource res)
+                {
+                    _asm = asm;
+                    _res = res;
+                }
+
+                public string Uri => $"resm:{Name}?assembly={_asm.Name.Name}";
+                public string Name => _res.Name;
+                public string FilePath => Name;
+                public byte[] FileContents => _res.GetResourceData();
+
+                public void Remove() => _asm.MainModule.Resources.Remove(_res);
+            }
+        }
+    }
+}

Robust.Client.Injectors/XamlCompiler.cs

@@ -0,0 +1,434 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using Microsoft.Build.Framework;
+using Mono.Cecil;
+using Mono.Cecil.Cil;
+using Mono.Cecil.Rocks;
+using Pidgin;
+using XamlX;
+using XamlX.Ast;
+using XamlX.Emit;
+using XamlX.IL;
+using XamlX.Parsers;
+using XamlX.Transform;
+using XamlX.TypeSystem;
+
+namespace Robust.Build.Tasks
+{
+    /// <summary>
+    /// Based on https://github.com/AvaloniaUI/Avalonia/blob/c85fa2b9977d251a31886c2534613b4730fbaeaf/src/Avalonia.Build.Tasks/XamlCompilerTaskExecutor.cs
+    /// Adjusted for our UI-Framework
+    /// </summary>
+    public partial class XamlCompiler
+    {
+        public static (bool success, bool writtentofile) Compile(IBuildEngine engine, string input, string[] references,
+            string projectDirectory, string output, string strongNameKey)
+        {
+            var typeSystem = new CecilTypeSystem(references
+                .Where(r => !r.ToLowerInvariant().EndsWith("robust.build.tasks.dll"))
+                .Concat(new[] { input }), input);
+
+            var asm = typeSystem.TargetAssemblyDefinition;
+
+            if (asm.MainModule.GetType("CompiledRobustXaml", "XamlIlContext") != null)
+            {
+                // If this type exists, the assembly has already been processed by us.
+                // Do not run again, it would corrupt the file.
+                // This *shouldn't* be possible due to Inputs/Outputs dependencies in the build system,
+                // but better safe than sorry eh?
+                engine.LogWarningEvent(new BuildWarningEventArgs("XAMLIL", "", "", 0, 0, 0, 0, "Ran twice on same assembly file; ignoring.", "", ""));
+                return (true, false);
+            }
+
+            var compileRes = CompileCore(engine, typeSystem);
+            if (compileRes == null)
+                return (true, false);
+            if (compileRes == false)
+                return (false, false);
+
+            var writerParameters = new WriterParameters { WriteSymbols = asm.MainModule.HasSymbols };
+            if (!string.IsNullOrWhiteSpace(strongNameKey))
+                writerParameters.StrongNameKeyBlob = File.ReadAllBytes(strongNameKey);
+
+            asm.Write(output, writerParameters);
+
+            return (true, true);
+
+        }
+
+        static bool? CompileCore(IBuildEngine engine, CecilTypeSystem typeSystem)
+        {
+            var asm = typeSystem.TargetAssemblyDefinition;
+            var embrsc = new EmbeddedResources(asm);
+
+            if (embrsc.Resources.Count(CheckXamlName) == 0)
+                // Nothing to do
+                return null;
+
+            var xamlLanguage = new XamlLanguageTypeMappings(typeSystem)
+            {
+                XmlnsAttributes =
+                {
+                    typeSystem.GetType("Avalonia.Metadata.XmlnsDefinitionAttribute"),
+
+                },
+                ContentAttributes =
+                {
+                    typeSystem.GetType("Robust.Client.UserInterface.XAML.ContentAttribute")
+                },
+                UsableDuringInitializationAttributes =
+                {
+                    typeSystem.GetType("Robust.Client.UserInterface.XAML.UsableDuringInitializationAttribute")
+                },
+                DeferredContentPropertyAttributes =
+                {
+                    typeSystem.GetType("Robust.Client.UserInterface.XAML.DeferredContentAttribute")
+                },
+                RootObjectProvider = typeSystem.GetType("Robust.Client.UserInterface.XAML.ITestRootObjectProvider"),
+                UriContextProvider = typeSystem.GetType("Robust.Client.UserInterface.XAML.ITestUriContext"),
+                ProvideValueTarget = typeSystem.GetType("Robust.Client.UserInterface.XAML.ITestProvideValueTarget"),
+            };
+            var emitConfig = new XamlLanguageEmitMappings<IXamlILEmitter, XamlILNodeEmitResult>
+            {
+                ContextTypeBuilderCallback = (b,c) => EmitNameScopeField(xamlLanguage, typeSystem, b, c)
+            };
+
+            var transformerconfig = new TransformerConfiguration(
+                typeSystem,
+                typeSystem.TargetAssembly,
+                xamlLanguage,
+                XamlXmlnsMappings.Resolve(typeSystem, xamlLanguage), CustomValueConverter);
+
+            var contextDef = new TypeDefinition("CompiledRobustXaml", "XamlIlContext",
+                TypeAttributes.Class, asm.MainModule.TypeSystem.Object);
+            asm.MainModule.Types.Add(contextDef);
+            var contextClass = XamlILContextDefinition.GenerateContextClass(typeSystem.CreateTypeBuilder(contextDef), typeSystem,
+                xamlLanguage, emitConfig);
+
+            var compiler =
+                new RobustXamlILCompiler(transformerconfig, emitConfig, true);
+
+            var loaderDispatcherDef = new TypeDefinition("CompiledRobustXaml", "!XamlLoader",
+                TypeAttributes.Class, asm.MainModule.TypeSystem.Object);
+
+            var loaderDispatcherMethod = new MethodDefinition("TryLoad",
+                MethodAttributes.Static | MethodAttributes.Public,
+                asm.MainModule.TypeSystem.Object)
+            {
+                Parameters = {new ParameterDefinition(asm.MainModule.TypeSystem.String)}
+            };
+            loaderDispatcherDef.Methods.Add(loaderDispatcherMethod);
+            asm.MainModule.Types.Add(loaderDispatcherDef);
+
+            var stringEquals = asm.MainModule.ImportReference(asm.MainModule.TypeSystem.String.Resolve().Methods.First(
+                m =>
+                    m.IsStatic && m.Name == "Equals" && m.Parameters.Count == 2 &&
+                    m.ReturnType.FullName == "System.Boolean"
+                    && m.Parameters[0].ParameterType.FullName == "System.String"
+                    && m.Parameters[1].ParameterType.FullName == "System.String"));
+
+            bool CompileGroup(IResourceGroup group)
+            {
+                var typeDef = new TypeDefinition("CompiledRobustXaml", "!" + group.Name, TypeAttributes.Class,
+                    asm.MainModule.TypeSystem.Object);
+
+                //typeDef.CustomAttributes.Add(new CustomAttribute(ed));
+                asm.MainModule.Types.Add(typeDef);
+                var builder = typeSystem.CreateTypeBuilder(typeDef);
+
+                foreach (var res in group.Resources.Where(CheckXamlName))
+                {
+                    try
+                    {
+                        engine.LogMessage($"XAMLIL: {res.Name} -> {res.Uri}", MessageImportance.Low);
+
+                        var xaml = new StreamReader(new MemoryStream(res.FileContents)).ReadToEnd();
+                        var parsed = XDocumentXamlParser.Parse(xaml);
+
+                        var initialRoot = (XamlAstObjectNode) parsed.Root;
+
+                        var classDirective = initialRoot.Children.OfType<XamlAstXmlDirective>()
+                            .FirstOrDefault(d => d.Namespace == XamlNamespaces.Xaml2006 && d.Name == "Class");
+                        string classname;
+                        if (classDirective != null && classDirective.Values[0] is XamlAstTextNode tn)
+                        {
+                            classname = tn.Text;
+                        }
+                        else
+                        {
+                            classname = res.Name.Replace(".xaml","");
+                        }
+
+                        var classType = typeSystem.TargetAssembly.FindType(classname);
+                        if (classType == null)
+                            throw new Exception($"Unable to find type '{classname}'");
+
+                        compiler.Transform(parsed);
+
+                        var populateName = $"Populate:{res.Name}";
+                        var buildName = $"Build:{res.Name}";
+
+                        var classTypeDefinition = typeSystem.GetTypeReference(classType).Resolve();
+
+                        var populateBuilder = typeSystem.CreateTypeBuilder(classTypeDefinition);
+
+                        compiler.Compile(parsed, contextClass,
+                            compiler.DefinePopulateMethod(populateBuilder, parsed, populateName,
+                                classTypeDefinition == null),
+                            compiler.DefineBuildMethod(builder, parsed, buildName, true),
+                            null,
+                            (closureName, closureBaseType) =>
+                                populateBuilder.DefineSubType(closureBaseType, closureName, false),
+                            res.Uri, res
+                        );
+
+                        //add compiled populate method
+                        var compiledPopulateMethod = typeSystem.GetTypeReference(populateBuilder).Resolve().Methods
+                            .First(m => m.Name == populateName);
+
+                        const string TrampolineName = "!XamlIlPopulateTrampoline";
+                        var trampoline = new MethodDefinition(TrampolineName,
+                            MethodAttributes.Static | MethodAttributes.Private, asm.MainModule.TypeSystem.Void);
+                        trampoline.Parameters.Add(new ParameterDefinition(classTypeDefinition));
+                        classTypeDefinition.Methods.Add(trampoline);
+
+                        trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Ldnull));
+                        trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Ldarg_0));
+                        trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Call, compiledPopulateMethod));
+                        trampoline.Body.Instructions.Add(Instruction.Create(OpCodes.Ret));
+
+                        var foundXamlLoader = false;
+                        // Find RobustXamlLoader.Load(this) and replace it with !XamlIlPopulateTrampoline(this)
+                        foreach (var method in classTypeDefinition.Methods
+                            .Where(m => !m.Attributes.HasFlag(MethodAttributes.Static)))
+                        {
+                            var i = method.Body.Instructions;
+                            for (var c = 1; c < i.Count; c++)
+                            {
+                                if (i[c].OpCode == OpCodes.Call)
+                                {
+                                    var op = i[c].Operand as MethodReference;
+
+                                    if (op != null
+                                        && op.Name == TrampolineName)
+                                    {
+                                        foundXamlLoader = true;
+                                        break;
+                                    }
+
+                                    if (op != null
+                                        && op.Name == "Load"
+                                        && op.Parameters.Count == 1
+                                        && op.Parameters[0].ParameterType.FullName == "System.Object"
+                                        && op.DeclaringType.FullName == "Robust.Client.UserInterface.XAML.RobustXamlLoader")
+                                    {
+                                        if (MatchThisCall(i, c - 1))
+                                        {
+                                            i[c].Operand = trampoline;
+                                            foundXamlLoader = true;
+                                        }
+                                    }
+                                }
+                            }
+                        }
+
+                        if (!foundXamlLoader)
+                        {
+                            var ctors = classTypeDefinition.GetConstructors()
+                                .Where(c => !c.IsStatic).ToList();
+                            // We can inject xaml loader into default constructor
+                            if (ctors.Count == 1 && ctors[0].Body.Instructions.Count(o=>o.OpCode != OpCodes.Nop) == 3)
+                            {
+                                var i = ctors[0].Body.Instructions;
+                                var retIdx = i.IndexOf(i.Last(x => x.OpCode == OpCodes.Ret));
+                                i.Insert(retIdx, Instruction.Create(OpCodes.Call, trampoline));
+                                i.Insert(retIdx, Instruction.Create(OpCodes.Ldarg_0));
+                            }
+                            else
+                            {
+                                throw new InvalidProgramException(
+                                    $"No call to RobustXamlLoader.Load(this) call found anywhere in the type {classType.FullName} and type seems to have custom constructors.");
+                            }
+                        }
+
+                        //add compiled build method
+                        var compiledBuildMethod = typeSystem.GetTypeReference(builder).Resolve().Methods
+                            .First(m => m.Name == buildName);
+                        var parameterlessCtor = classTypeDefinition.GetConstructors()
+                            .FirstOrDefault(c => c.IsPublic && !c.IsStatic && !c.HasParameters);
+
+                        if (compiledBuildMethod != null && parameterlessCtor != null)
+                        {
+                            var i = loaderDispatcherMethod.Body.Instructions;
+                            var nop = Instruction.Create(OpCodes.Nop);
+                            i.Add(Instruction.Create(OpCodes.Ldarg_0));
+                            i.Add(Instruction.Create(OpCodes.Ldstr, res.Uri));
+                            i.Add(Instruction.Create(OpCodes.Call, stringEquals));
+                            i.Add(Instruction.Create(OpCodes.Brfalse, nop));
+                            if (parameterlessCtor != null)
+                                i.Add(Instruction.Create(OpCodes.Newobj, parameterlessCtor));
+                            else
+                            {
+                                i.Add(Instruction.Create(OpCodes.Call, compiledBuildMethod));
+                            }
+
+                            i.Add(Instruction.Create(OpCodes.Ret));
+                            i.Add(nop);
+                        }
+                    }
+                    catch (Exception e)
+                    {
+                        engine.LogErrorEvent(new BuildErrorEventArgs("XAMLIL", "", res.FilePath, 0, 0, 0, 0,
+                            $"{res.FilePath}: {e.Message}", "", "CompileRobustXaml"));
+                    }
+                }
+                return true;
+            }
+
+            if (embrsc.Resources.Count(CheckXamlName) != 0)
+            {
+                if (!CompileGroup(embrsc))
+                    return false;
+            }
+
+            loaderDispatcherMethod.Body.Instructions.Add(Instruction.Create(OpCodes.Ldnull));
+            loaderDispatcherMethod.Body.Instructions.Add(Instruction.Create(OpCodes.Ret));
+            return true;
+        }
+
+        private static bool CustomValueConverter(
+            AstTransformationContext context,
+            IXamlAstValueNode node,
+            IXamlType type,
+            out IXamlAstValueNode result)
+        {
+            if (!(node is XamlAstTextNode textNode))
+            {
+                result = null;
+                return false;
+            }
+
+            var text = textNode.Text;
+            var types = context.GetRobustTypes();
+
+            if (type.Equals(types.Vector2))
+            {
+                var foo = MathParsing.Single2.Parse(text);
+
+                if (!foo.Success)
+                    throw new XamlLoadException($"Unable to parse \"{text}\" as a Vector2", node);
+
+                var (x, y) = foo.Value;
+
+                result = new RXamlSingleVecLikeConstAstNode(
+                    node,
+                    types.Vector2, types.Vector2ConstructorFull,
+                    types.Single, new[] {x, y});
+                return true;
+            }
+
+            if (type.Equals(types.Thickness))
+            {
+                var foo = MathParsing.Thickness.Parse(text);
+
+                if (!foo.Success)
+                    throw new XamlLoadException($"Unable to parse \"{text}\" as a Thickness", node);
+
+                var val = foo.Value;
+                float[] full;
+                if (val.Length == 1)
+                {
+                    var u = val[0];
+                    full = new[] {u, u, u, u};
+                }
+                else if (val.Length == 2)
+                {
+                    var h = val[0];
+                    var v = val[1];
+                    full = new[] {h, v, h, v};
+                }
+                else // 4
+                {
+                    full = val;
+                }
+
+                result = new RXamlSingleVecLikeConstAstNode(
+                    node,
+                    types.Thickness, types.ThicknessConstructorFull,
+                    types.Single, full);
+                return true;
+            }
+
+            if (type.Equals(types.Thickness))
+            {
+                var foo = MathParsing.Thickness.Parse(text);
+
+                if (!foo.Success)
+                    throw new XamlLoadException($"Unable to parse \"{text}\" as a Thickness", node);
+
+                var val = foo.Value;
+                float[] full;
+                if (val.Length == 1)
+                {
+                    var u = val[0];
+                    full = new[] {u, u, u, u};
+                }
+                else if (val.Length == 2)
+                {
+                    var h = val[0];
+                    var v = val[1];
+                    full = new[] {h, v, h, v};
+                }
+                else // 4
+                {
+                    full = val;
+                }
+
+                result = new RXamlSingleVecLikeConstAstNode(
+                    node,
+                    types.Thickness, types.ThicknessConstructorFull,
+                    types.Single, full);
+                return true;
+            }
+
+            if (type.Equals(types.Color))
+            {
+                // TODO: Interpret these colors at XAML compile time instead of at runtime.
+                result = new RXamlColorAstNode(node, types, text);
+                return true;
+            }
+
+            result = null;
+            return false;
+        }
+
+        public const string ContextNameScopeFieldName = "RobustNameScope";
+
+        private static void EmitNameScopeField(XamlLanguageTypeMappings xamlLanguage, CecilTypeSystem typeSystem, IXamlTypeBuilder<IXamlILEmitter> typeBuilder, IXamlILEmitter constructor)
+        {
+            var nameScopeType = typeSystem.FindType("Robust.Client.UserInterface.XAML.NameScope");
+            var field = typeBuilder.DefineField(nameScopeType,
+                ContextNameScopeFieldName, true, false);
+            constructor
+                .Ldarg_0()
+                .Newobj(nameScopeType.GetConstructor())
+                .Stfld(field);
+        }
+    }
+
+    interface IResource : IFileSource
+    {
+        string Uri { get; }
+        string Name { get; }
+        void Remove();
+
+    }
+
+    interface IResourceGroup
+    {
+        string Name { get; }
+        IEnumerable<IResource> Resources { get; }
+    }
+}

Robust.Client.NameGenerator/InvalidXamlRootTypeException.cs

@@ -0,0 +1,19 @@
+using System;
+using Microsoft.CodeAnalysis;
+
+namespace Robust.Client.NameGenerator
+{
+    public class InvalidXamlRootTypeException : Exception
+    {
+        public readonly INamedTypeSymbol ExpectedType;
+        public readonly INamedTypeSymbol ExpectedBaseType;
+        public readonly INamedTypeSymbol Actual;
+
+        public InvalidXamlRootTypeException(INamedTypeSymbol actual, INamedTypeSymbol expectedType, INamedTypeSymbol expectedBaseType)
+        {
+            Actual = actual;
+            ExpectedType = expectedType;
+            ExpectedBaseType = expectedBaseType;
+        }
+    }
+}

Robust.Client.NameGenerator/NameReferenceSyntaxReceiver.cs

@@ -0,0 +1,21 @@
+using System.Collections.Generic;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+
+namespace Robust.Client.NameGenerator
+{
+    /// <summary>
+    /// Taken from https://github.com/AvaloniaUI/Avalonia.NameGenerator/blob/ecc9677a23de5cbc90af07ccac14e31c0da41d6a/src/Avalonia.NameGenerator/NameReferenceSyntaxReceiver.cs
+    /// </summary>
+    internal class NameReferenceSyntaxReceiver : ISyntaxReceiver
+    {
+        public List<ClassDeclarationSyntax> CandidateClasses { get; } = new List<ClassDeclarationSyntax>();
+
+        public void OnVisitSyntaxNode(SyntaxNode syntaxNode)
+        {
+            if (syntaxNode is ClassDeclarationSyntax classDeclarationSyntax &&
+                classDeclarationSyntax.AttributeLists.Count > 0)
+                CandidateClasses.Add(classDeclarationSyntax);
+        }
+    }
+}

Robust.Client.NameGenerator/Robust.Client.NameGenerator.csproj

@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>netstandard2.0</TargetFramework>
+    </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="3.8.0" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.2" PrivateAssets="all" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Compile Link="XamlX\filename" Include="../XamlX/src/XamlX/**/*.cs" />
+    <Compile Remove="../XamlX/src/XamlX/**/SreTypeSystem.cs" />
+    <Compile Remove="../XamlX/src/XamlX/obj/**" />
+  </ItemGroup>
+</Project>

Robust.Client.NameGenerator/RoslynTypeSystem.cs

@@ -0,0 +1,287 @@
+using System.Collections.Generic;
+using System.Linq;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+using XamlX.TypeSystem;
+
+namespace Robust.Client.NameGenerator
+{
+    /// <summary>
+    /// Taken from https://github.com/AvaloniaUI/Avalonia.NameGenerator/blob/ecc9677a23de5cbc90af07ccac14e31c0da41d6a/src/Avalonia.NameGenerator/Infrastructure/RoslynTypeSystem.cs
+    /// </summary>
+     public class RoslynTypeSystem : IXamlTypeSystem
+    {
+        private readonly List<IXamlAssembly> _assemblies = new List<IXamlAssembly>();
+
+        public RoslynTypeSystem(CSharpCompilation compilation)
+        {
+            _assemblies.Add(new RoslynAssembly(compilation.Assembly));
+
+            var assemblySymbols = compilation
+                .References
+                .Select(compilation.GetAssemblyOrModuleSymbol)
+                .OfType<IAssemblySymbol>()
+                .Select(assembly => new RoslynAssembly(assembly))
+                .ToList();
+
+            _assemblies.AddRange(assemblySymbols);
+        }
+
+        public IReadOnlyList<IXamlAssembly> Assemblies => _assemblies;
+
+        public IXamlAssembly FindAssembly(string substring) => _assemblies[0];
+
+        public IXamlType FindType(string name)
+        {
+            foreach (var assembly in _assemblies)
+            {
+                var type = assembly.FindType(name);
+                if (type != null)
+                    return type;
+            }
+
+            return null;
+        }
+
+        public IXamlType FindType(string name, string assembly)
+        {
+            foreach (var assemblyInstance in _assemblies)
+            {
+                var type = assemblyInstance.FindType(name);
+                if (type != null)
+                    return type;
+            }
+
+            return null;
+        }
+    }
+
+    public class RoslynAssembly : IXamlAssembly
+    {
+        private readonly IAssemblySymbol _symbol;
+
+        public RoslynAssembly(IAssemblySymbol symbol) => _symbol = symbol;
+
+        public bool Equals(IXamlAssembly other) =>
+            other is RoslynAssembly roslynAssembly &&
+            SymbolEqualityComparer.Default.Equals(_symbol, roslynAssembly._symbol);
+
+        public string Name => _symbol.Name;
+
+        public IReadOnlyList<IXamlCustomAttribute> CustomAttributes =>
+            _symbol.GetAttributes()
+                .Select(data => new RoslynAttribute(data, this))
+                .ToList();
+
+        public IXamlType FindType(string fullName)
+        {
+            var type = _symbol.GetTypeByMetadataName(fullName);
+            return type is null ? null : new RoslynType(type, this);
+        }
+    }
+
+    public class RoslynAttribute : IXamlCustomAttribute
+    {
+        private readonly AttributeData _data;
+        private readonly RoslynAssembly _assembly;
+
+        public RoslynAttribute(AttributeData data, RoslynAssembly assembly)
+        {
+            _data = data;
+            _assembly = assembly;
+        }
+
+        public bool Equals(IXamlCustomAttribute other) =>
+            other is RoslynAttribute attribute &&
+            _data == attribute._data;
+
+        public IXamlType Type => new RoslynType(_data.AttributeClass, _assembly);
+
+        public List<object> Parameters =>
+            _data.ConstructorArguments
+                .Select(argument => argument.Value)
+                .ToList();
+
+        public Dictionary<string, object> Properties =>
+            _data.NamedArguments.ToDictionary(
+                pair => pair.Key,
+                pair => pair.Value.Value);
+    }
+
+    public class RoslynType : IXamlType
+    {
+        private static readonly SymbolDisplayFormat SymbolDisplayFormat = new SymbolDisplayFormat(
+            typeQualificationStyle: SymbolDisplayTypeQualificationStyle.NameAndContainingTypesAndNamespaces,
+            genericsOptions: SymbolDisplayGenericsOptions.IncludeTypeParameters |
+                             SymbolDisplayGenericsOptions.IncludeTypeConstraints |
+                             SymbolDisplayGenericsOptions.IncludeVariance);
+
+        private readonly RoslynAssembly _assembly;
+        private readonly INamedTypeSymbol _symbol;
+
+        public RoslynType(INamedTypeSymbol symbol, RoslynAssembly assembly)
+        {
+            _symbol = symbol;
+            _assembly = assembly;
+        }
+
+        public bool Equals(IXamlType other) =>
+            other is RoslynType roslynType &&
+            SymbolEqualityComparer.Default.Equals(_symbol, roslynType._symbol);
+
+        public object Id => _symbol;
+
+        public string Name => _symbol.Name;
+
+        public string Namespace => _symbol.ContainingNamespace.ToDisplayString(SymbolDisplayFormat);
+
+        public string FullName => $"{Namespace}.{Name}";
+
+        public IXamlAssembly Assembly => _assembly;
+
+        public IReadOnlyList<IXamlProperty> Properties =>
+            _symbol.GetMembers()
+                .Where(member => member.Kind == SymbolKind.Property)
+                .OfType<IPropertySymbol>()
+                .Select(property => new RoslynProperty(property, _assembly))
+                .ToList();
+
+        public IReadOnlyList<IXamlEventInfo> Events { get; } = new List<IXamlEventInfo>();
+
+        public IReadOnlyList<IXamlField> Fields { get; } = new List<IXamlField>();
+
+        public IReadOnlyList<IXamlMethod> Methods { get; } = new List<IXamlMethod>();
+
+        public IReadOnlyList<IXamlConstructor> Constructors =>
+            _symbol.Constructors
+                .Select(method => new RoslynConstructor(method, _assembly))
+                .ToList();
+
+        public IReadOnlyList<IXamlCustomAttribute> CustomAttributes { get; } = new List<IXamlCustomAttribute>();
+
+        public IReadOnlyList<IXamlType> GenericArguments { get; } = new List<IXamlType>();
+
+        public bool IsAssignableFrom(IXamlType type) => type == this;
+
+        public IXamlType MakeGenericType(IReadOnlyList<IXamlType> typeArguments) => this;
+
+        public IXamlType GenericTypeDefinition => this;
+
+        public bool IsArray => false;
+
+        public IXamlType ArrayElementType { get; } = null;
+
+        public IXamlType MakeArrayType(int dimensions) => null;
+
+        public IXamlType BaseType => _symbol.BaseType == null ? null : new RoslynType(_symbol.BaseType, _assembly);
+
+        public bool IsValueType { get; } = false;
+
+        public bool IsEnum { get; } = false;
+
+        public IReadOnlyList<IXamlType> Interfaces =>
+            _symbol.AllInterfaces
+                .Select(abstraction => new RoslynType(abstraction, _assembly))
+                .ToList();
+
+        public bool IsInterface => _symbol.IsAbstract;
+
+        public IXamlType GetEnumUnderlyingType() => null;
+
+        public IReadOnlyList<IXamlType> GenericParameters { get; } = new List<IXamlType>();
+    }
+
+    public class RoslynConstructor : IXamlConstructor
+    {
+        private readonly IMethodSymbol _symbol;
+        private readonly RoslynAssembly _assembly;
+
+        public RoslynConstructor(IMethodSymbol symbol, RoslynAssembly assembly)
+        {
+            _symbol = symbol;
+            _assembly = assembly;
+        }
+
+        public bool Equals(IXamlConstructor other) =>
+            other is RoslynConstructor roslynConstructor &&
+            SymbolEqualityComparer.Default.Equals(_symbol, roslynConstructor._symbol);
+
+        public bool IsPublic => true;
+
+        public bool IsStatic => false;
+
+        public IReadOnlyList<IXamlType> Parameters =>
+            _symbol.Parameters
+                .Select(parameter => parameter.Type)
+                .OfType<INamedTypeSymbol>()
+                .Select(type => new RoslynType(type, _assembly))
+                .ToList();
+    }
+
+    public class RoslynProperty : IXamlProperty
+    {
+        private readonly IPropertySymbol _symbol;
+        private readonly RoslynAssembly _assembly;
+
+        public RoslynProperty(IPropertySymbol symbol, RoslynAssembly assembly)
+        {
+            _symbol = symbol;
+            _assembly = assembly;
+        }
+
+        public bool Equals(IXamlProperty other) =>
+            other is RoslynProperty roslynProperty &&
+            SymbolEqualityComparer.Default.Equals(_symbol, roslynProperty._symbol);
+
+        public string Name => _symbol.Name;
+
+        public IXamlType PropertyType =>
+            _symbol.Type is INamedTypeSymbol namedTypeSymbol
+                ? new RoslynType(namedTypeSymbol, _assembly)
+                : null;
+
+        public IXamlMethod Getter => _symbol.GetMethod == null ? null : new RoslynMethod(_symbol.GetMethod, _assembly);
+
+        public IXamlMethod Setter => _symbol.SetMethod == null ? null : new RoslynMethod(_symbol.SetMethod, _assembly);
+
+        public IReadOnlyList<IXamlCustomAttribute> CustomAttributes { get; } = new List<IXamlCustomAttribute>();
+
+        public IReadOnlyList<IXamlType> IndexerParameters { get; } = new List<IXamlType>();
+    }
+
+    public class RoslynMethod : IXamlMethod
+    {
+        private readonly IMethodSymbol _symbol;
+        private readonly RoslynAssembly _assembly;
+
+        public RoslynMethod(IMethodSymbol symbol, RoslynAssembly assembly)
+        {
+            _symbol = symbol;
+            _assembly = assembly;
+        }
+
+        public bool Equals(IXamlMethod other) =>
+            other is RoslynMethod roslynMethod &&
+            SymbolEqualityComparer.Default.Equals(roslynMethod._symbol, _symbol);
+
+        public string Name => _symbol.Name;
+
+        public bool IsPublic => true;
+
+        public bool IsStatic => false;
+
+        public IXamlType ReturnType => new RoslynType((INamedTypeSymbol) _symbol.ReturnType, _assembly);
+
+        public IReadOnlyList<IXamlType> Parameters =>
+            _symbol.Parameters.Select(parameter => parameter.Type)
+                .OfType<INamedTypeSymbol>()
+                .Select(type => new RoslynType(type, _assembly))
+                .ToList();
+
+        public IXamlType DeclaringType => new RoslynType((INamedTypeSymbol)_symbol.ReceiverType, _assembly);
+
+        public IXamlMethod MakeGenericMethod(IReadOnlyList<IXamlType> typeArguments) => null;
+
+        public IReadOnlyList<IXamlCustomAttribute> CustomAttributes { get; } = new List<IXamlCustomAttribute>();
+    }
+}

Robust.Client.NameGenerator/XamlUiPartialClassGenerator.cs

@@ -0,0 +1,299 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.Text;
+using XamlX.Ast;
+using XamlX.Emit;
+using XamlX.IL;
+using XamlX.Parsers;
+using XamlX.Transform;
+using XamlX.Transform.Transformers;
+using XamlX.TypeSystem;
+
+namespace Robust.Client.NameGenerator
+{
+    /// <summary>
+    /// Based on https://github.com/AvaloniaUI/Avalonia.NameGenerator/blob/ecc9677a23de5cbc90af07ccac14e31c0da41d6a/src/Avalonia.NameGenerator/NameReferenceGenerator.cs
+    /// Adjusted for our UI-Framework & needs.
+    /// </summary>
+    [Generator]
+    public class XamlUiPartialClassGenerator : ISourceGenerator
+    {
+        private const string AttributeName = "Robust.Client.AutoGenerated.GenerateTypedNameReferencesAttribute";
+        private const string AttributeFile = "GenerateTypedNameReferencesAttribute";
+
+        private const string AttributeCode = @"// <auto-generated />
+using System;
+namespace Robust.Client.AutoGenerated
+{
+    [AttributeUsage(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
+    public sealed class GenerateTypedNameReferencesAttribute : Attribute { }
+}
+";
+
+        class NameVisitor : IXamlAstVisitor
+        {
+            private List<(string name, string type)> _names = new List<(string name, string type)>();
+
+            public static List<(string name, string type)> GetNames(IXamlAstNode node)
+            {
+                var visitor = new NameVisitor();
+                node.Visit(visitor);
+                return visitor._names;
+            }
+
+            private bool IsControl(IXamlType type) => type.FullName != "System.Object" &&
+                                                      (type.FullName == "Robust.Client.UserInterface.Control" ||
+                                                       IsControl(type.BaseType));
+
+            public IXamlAstNode Visit(IXamlAstNode node)
+            {
+                if (node is XamlAstObjectNode objectNode)
+                {
+                    var clrtype = objectNode.Type.GetClrType();
+                    var isControl = IsControl(clrtype);
+                    //clrtype.Interfaces.Any(i =>
+                    //i.IsInterface && i.FullName == "Robust.Client.UserInterface.IControl");
+
+                    if (!isControl)
+                        return node;
+
+                    foreach (var child in objectNode.Children)
+                    {
+                        if (child is XamlAstXamlPropertyValueNode propertyValueNode &&
+                            propertyValueNode.Property is XamlAstNamePropertyReference namedProperty &&
+                            namedProperty.Name == "Name" &&
+                            propertyValueNode.Values.Count > 0 &&
+                            propertyValueNode.Values[0] is XamlAstTextNode text)
+                        {
+                            var reg = (text.Text, $@"{clrtype.Namespace}.{clrtype.Name}");
+                            if (!_names.Contains(reg))
+                            {
+                                _names.Add(reg);
+                            }
+                        }
+                    }
+                }
+
+                return node;
+            }
+
+            public void Push(IXamlAstNode node)
+            {
+            }
+
+            public void Pop()
+            {
+            }
+        }
+
+        private static string GenerateSourceCode(
+            INamedTypeSymbol classSymbol,
+            string xamlFile,
+            CSharpCompilation comp)
+        {
+            var className = classSymbol.Name;
+            var nameSpace = classSymbol.ContainingNamespace.ToDisplayString();
+            var parsed = XDocumentXamlParser.Parse(xamlFile);
+            var typeSystem = new RoslynTypeSystem(comp);
+            var compiler =
+                new XamlILCompiler(
+                    new TransformerConfiguration(typeSystem, typeSystem.Assemblies[0],
+                        new XamlLanguageTypeMappings(typeSystem)
+                        {
+                            XmlnsAttributes = {typeSystem.GetType("Avalonia.Metadata.XmlnsDefinitionAttribute")}
+                        }),
+                    new XamlLanguageEmitMappings<IXamlILEmitter, XamlILNodeEmitResult>(), false);
+            compiler.Transformers.Add(new TypeReferenceResolver());
+            compiler.Transform(parsed);
+            var initialRoot = (XamlAstObjectNode) parsed.Root;
+            var names = NameVisitor.GetNames(initialRoot);
+
+            var rootType = (INamedTypeSymbol)initialRoot.Type.GetClrType().Id;
+            var rootTypeString = rootType.ToString();
+            if (classSymbol.ToString() != rootTypeString && classSymbol.BaseType?.ToString() != rootTypeString)
+                throw new InvalidXamlRootTypeException(rootType, classSymbol, classSymbol.BaseType);
+
+            var fieldAccess = classSymbol.IsSealed ? "private" : "protected";
+            //var names = NameVisitor.GetNames((XamlAstObjectNode)XDocumentXamlParser.Parse(xamlFile).Root);
+            var namedControls = names.Select(info => "        " +
+                                                     $"{fieldAccess} global::{info.type} {info.name} => " +
+                                                     $"this.FindControl<global::{info.type}>(\"{info.name}\");");
+            return $@"// <auto-generated />
+using Robust.Client.UserInterface;
+using Robust.Client.UserInterface.Controls;
+namespace {nameSpace}
+{{
+    partial class {className}
+    {{
+{string.Join("\n", namedControls)}
+    }}
+}}
+";
+        }
+
+
+        public void Execute(GeneratorExecutionContext context)
+        {
+            var comp = (CSharpCompilation) context.Compilation;
+            if (comp.GetTypeByMetadataName(AttributeName) == null)
+                context.AddSource(AttributeFile, SourceText.From(AttributeCode, Encoding.UTF8));
+            if (!(context.SyntaxReceiver is NameReferenceSyntaxReceiver receiver))
+            {
+                return;
+            }
+
+            var symbols = UnpackAnnotatedTypes(context, comp, receiver);
+            if (symbols == null)
+                return;
+
+            foreach (var typeSymbol in symbols)
+            {
+                var xamlFileName = $"{typeSymbol.Name}.xaml";
+                var xamlFileNameSep = $"{Path.DirectorySeparatorChar}{xamlFileName}";
+                var relevantXamlFiles = context.AdditionalFiles.Where(t => t.Path.EndsWith(xamlFileNameSep)).ToArray();
+
+                if (relevantXamlFiles.Length == 0)
+                {
+                    context.ReportDiagnostic(
+                        Diagnostic.Create(
+                            new DiagnosticDescriptor(
+                                "RXN0001",
+                                $"Unable to discover the relevant Robust XAML file for {typeSymbol}.",
+                                "Unable to discover the relevant Robust XAML file " +
+                                $"expected at {xamlFileName}",
+                                "Usage",
+                                DiagnosticSeverity.Error,
+                                true),
+                            typeSymbol.Locations[0]));
+                    continue;
+                }
+
+                if (relevantXamlFiles.Length > 1)
+                {
+                    context.ReportDiagnostic(
+                        Diagnostic.Create(
+                            new DiagnosticDescriptor(
+                                "RXN0002",
+                                $"Found multiple candidate XAML files for {typeSymbol}",
+                                $"Multiple files exist with name {xamlFileName}",
+                                "Usage",
+                                DiagnosticSeverity.Error,
+                                true),
+                            typeSymbol.Locations[0]));
+                    continue;
+                }
+
+                var txt = relevantXamlFiles[0].GetText()?.ToString();
+                if (txt == null)
+                {
+                    context.ReportDiagnostic(
+                        Diagnostic.Create(
+                            new DiagnosticDescriptor(
+                                "RXN0004",
+                                $"Unexpected empty Xaml-File was found at {xamlFileName}",
+                                "Expected Content due to a Class with the same name being annotated with [GenerateTypedNameReferences].",
+                                "Usage",
+                                DiagnosticSeverity.Error,
+                                true),
+                            Location.Create(xamlFileName, new TextSpan(0, 0),
+                                new LinePositionSpan(new LinePosition(0, 0), new LinePosition(0, 0)))));
+                    continue;
+                }
+
+                try
+                {
+                    var sourceCode = GenerateSourceCode(typeSymbol, txt, comp);
+                    context.AddSource($"{typeSymbol.Name}.g.cs", SourceText.From(sourceCode, Encoding.UTF8));
+                }
+                catch (InvalidXamlRootTypeException invRootType)
+                {
+                    context.ReportDiagnostic(
+                        Diagnostic.Create(
+                            new DiagnosticDescriptor(
+                                "RXN0005",
+                                $"XAML-File {xamlFileName} has the wrong root type!",
+                                $"{xamlFileName}: Expected root type '{invRootType.ExpectedType}' or '{invRootType.ExpectedBaseType}', but got '{invRootType.Actual}'.",
+                                "Usage",
+                                DiagnosticSeverity.Error,
+                                true),
+                            Location.Create(xamlFileName, new TextSpan(0, 0),
+                                new LinePositionSpan(new LinePosition(0, 0), new LinePosition(0, 0)))));
+                    continue;
+                }
+                catch (Exception e)
+                {
+                    context.ReportDiagnostic(
+                        Diagnostic.Create(
+                            new DiagnosticDescriptor(
+                                "RXN0003",
+                                "Unhandled exception occured while generating typed Name references.",
+                                $"Unhandled exception occured while generating typed Name references: {e}",
+                                "Usage",
+                                DiagnosticSeverity.Error,
+                                true),
+                            typeSymbol.Locations[0]));
+                    continue;
+                }
+            }
+        }
+
+        private IReadOnlyList<INamedTypeSymbol> UnpackAnnotatedTypes(in GeneratorExecutionContext context,
+            CSharpCompilation comp, NameReferenceSyntaxReceiver receiver)
+        {
+            var options = (CSharpParseOptions) comp.SyntaxTrees[0].Options;
+            var compilation =
+                comp.AddSyntaxTrees(CSharpSyntaxTree.ParseText(SourceText.From(AttributeCode, Encoding.UTF8), options));
+            var symbols = new List<INamedTypeSymbol>();
+            var attributeSymbol = compilation.GetTypeByMetadataName(AttributeName);
+            foreach (var candidateClass in receiver.CandidateClasses)
+            {
+                var model = compilation.GetSemanticModel(candidateClass.SyntaxTree);
+                var typeSymbol = (INamedTypeSymbol) model.GetDeclaredSymbol(candidateClass);
+                var relevantAttribute = typeSymbol.GetAttributes().FirstOrDefault(attr =>
+                    attr.AttributeClass != null &&
+                    attr.AttributeClass.Equals(attributeSymbol, SymbolEqualityComparer.Default));
+
+                if (relevantAttribute == null)
+                {
+                    continue;
+                }
+
+                var isPartial = candidateClass.Modifiers.Any(m => m.IsKind(SyntaxKind.PartialKeyword));
+
+                if (isPartial)
+                {
+                    symbols.Add(typeSymbol);
+                }
+                else
+                {
+                    var missingPartialKeywordMessage =
+                        $"The type {typeSymbol.Name} should be declared with the 'partial' keyword " +
+                        "as it is annotated with the [GenerateTypedNameReferences] attribute.";
+
+                    context.ReportDiagnostic(
+                        Diagnostic.Create(
+                            new DiagnosticDescriptor(
+                                "RXN0006",
+                                missingPartialKeywordMessage,
+                                missingPartialKeywordMessage,
+                                "Usage",
+                                DiagnosticSeverity.Error,
+                                true),
+                            Location.None));
+                }
+            }
+
+            return symbols;
+        }
+
+        public void Initialize(GeneratorInitializationContext context)
+        {
+            context.RegisterForSyntaxNotifications(() => new NameReferenceSyntaxReceiver());
+        }
+    }
+}

Robust.Client/Animations/Animation.cs

@@ -1,6 +1,6 @@
 using System;
 using System.Collections.Generic;
-using Robust.Client.GameObjects.Components.Animations;
+using Robust.Client.GameObjects;
 
 namespace Robust.Client.Animations
 {
@@ -13,7 +13,7 @@ namespace Robust.Client.Animations
     /// <seealso cref="AnimationPlayerComponent"/>
     public sealed class Animation
     {
-        public readonly List<AnimationTrack> AnimationTracks = new();
+        public List<AnimationTrack> AnimationTracks { get; private set; } = new();
 
         public TimeSpan Length { get; set; }
     }

Robust.Client/Animations/AnimationTrackComponentProperty.cs

@@ -1,7 +1,7 @@
 using System;
 using JetBrains.Annotations;
 using Robust.Shared.Animations;
-using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.GameObjects;
 
 namespace Robust.Client.Animations
 {

Robust.Client/Animations/AnimationTrackControlProperty.cs

@@ -1,8 +1,7 @@
 using System;
-using Robust.Client.Animations;
 using Robust.Shared.Animations;
 
-namespace Content.Client.Animations
+namespace Robust.Client.Animations
 {
     public class AnimationTrackControlProperty : AnimationTrackProperty
     {

Robust.Client/Animations/AnimationTrackPlaySound.cs

@@ -1,11 +1,9 @@
 using System;
 using System.Collections.Generic;
-using Robust.Client.GameObjects.EntitySystems;
+using Robust.Client.GameObjects;
 using Robust.Shared.Audio;
-using Robust.Shared.GameObjects.Systems;
-using Robust.Shared.Interfaces.GameObjects;
-using Robust.Shared.IoC;
-using Robust.Shared.Utility;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Player;
 
 namespace Robust.Client.Animations
 {
@@ -17,7 +15,7 @@ namespace Robust.Client.Animations
         /// <summary>
         ///     A list of key frames for when to fire flicks.
         /// </summary>
-        public readonly List<KeyFrame> KeyFrames = new();
+        public List<KeyFrame> KeyFrames { get; private set; } = new();
 
         public override (int KeyFrameIndex, float FramePlayingTime) InitPlayback()
         {
@@ -39,8 +37,7 @@ namespace Robust.Client.Animations
 
                 var keyFrame = KeyFrames[keyFrameIndex];
 
-                EntitySystem.Get<AudioSystem>()
-                    .Play(keyFrame.Resource, entity, keyFrame.AudioParamsFunc.Invoke());
+                SoundSystem.Play(Filter.Local(), keyFrame.Resource, entity, keyFrame.AudioParamsFunc.Invoke());
             }
 
             return (keyFrameIndex, playingTime);

Robust.Client/Animations/AnimationTrackProperty.cs

@@ -10,7 +10,7 @@ namespace Robust.Client.Animations
     /// </summary>
     public abstract class AnimationTrackProperty : AnimationTrack
     {
-        public readonly List<KeyFrame> KeyFrames = new();
+        public List<KeyFrame> KeyFrames { get; protected set; } = new();
 
         /// <summary>
         ///     How to interpolate values when between two keyframes.

Robust.Client/Animations/AnimationTrackSpriteFlick.cs

@@ -1,8 +1,8 @@
 using System;
 using System.Collections.Generic;
+using Robust.Client.GameObjects;
 using Robust.Client.Graphics;
-using Robust.Client.Interfaces.GameObjects.Components;
-using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.GameObjects;
 using Robust.Shared.Utility;
 
 namespace Robust.Client.Animations
@@ -15,7 +15,7 @@ namespace Robust.Client.Animations
         /// <summary>
         ///     A list of key frames for when to fire flicks.
         /// </summary>
-        public readonly List<KeyFrame> KeyFrames = new();
+        public List<KeyFrame> KeyFrames { get; private set; } = new();
 
         // TODO: Should this layer key be per keyframe maybe?
         /// <summary>

Robust.Client/Audio/AudioStream.cs

@@ -1,6 +1,5 @@
 using System;
 using Robust.Client.Graphics;
-using Robust.Client.Graphics.Clyde;
 
 namespace Robust.Client.Audio
 {

Robust.Client/Audio/Midi/MidiManager.cs

@@ -4,17 +4,20 @@ using System.IO;
 using System.Runtime.InteropServices;
 using System.Threading;
 using NFluidsynth;
-using Robust.Client.Interfaces.Graphics.ClientEye;
-using Robust.Client.Interfaces.ResourceManagement;
-using Robust.Shared.Interfaces.GameObjects;
-using Robust.Shared.Interfaces.Log;
-using Robust.Shared.Interfaces.Physics;
-using Robust.Shared.Interfaces.Resources;
+using Robust.Client.Graphics;
+using Robust.Client.ResourceManagement;
+using Robust.Shared;
+using Robust.Shared.Configuration;
+using Robust.Shared.ContentPack;
+using Robust.Shared.GameObjects;
 using Robust.Shared.IoC;
 using Robust.Shared.Log;
 using Robust.Shared.Map;
 using Robust.Shared.Maths;
+using Robust.Shared.Physics;
+using Robust.Shared.Physics.Broadphase;
 using Robust.Shared.Utility;
+using Robust.Shared.ViewVariables;
 using Logger = Robust.Shared.Log.Logger;
 
 namespace Robust.Client.Audio.Midi
@@ -33,24 +36,6 @@ namespace Robust.Client.Audio.Midi
         /// </returns>
         IMidiRenderer? GetNewRenderer();
 
-        /*
-        /// <summary>
-        ///     Checks whether the file at the given path is a valid midi file or not.
-        /// </summary>
-        /// <remarks>
-        ///     We add this here so content doesn't need to reference NFluidsynth.
-        /// </remarks>
-        bool IsMidiFile(string filename);
-
-        /// <summary>
-        ///     Checks whether the file at the given path is a valid midi file or not.
-        /// </summary>
-        /// <remarks>
-        ///     We add this here so content doesn't need to reference NFluidsynth.
-        /// </remarks>
-        bool IsSoundfontFile(string filename);
-        */
-
         /// <summary>
         ///     Method called every frame.
         ///     Should be used to update positional audio.
@@ -58,20 +43,31 @@ namespace Robust.Client.Audio.Midi
         /// <param name="frameTime"></param>
         void FrameUpdate(float frameTime);
 
+        /// <summary>
+        ///     Volume, in db.
+        /// </summary>
+        float Volume { get; set; }
+
         /// <summary>
         ///     If true, MIDI support is available.
         /// </summary>
         bool IsAvailable { get; }
 
         public int OcclusionCollisionMask { get; set; }
+
+        void Shutdown();
     }
 
-    internal class MidiManager : IDisposable, IMidiManager
+    internal class MidiManager : IMidiManager
     {
         [Dependency] private readonly IEyeManager _eyeManager = default!;
         [Dependency] private readonly IResourceManagerInternal _resourceManager = default!;
         [Dependency] private readonly IEntityManager _entityManager = default!;
+        [Dependency] private readonly IConfigurationManager _cfgMan = default!;
 
+        private SharedBroadphaseSystem _broadPhaseSystem = default!;
+
+        [ViewVariables]
         public bool IsAvailable
         {
             get
@@ -82,12 +78,29 @@ namespace Robust.Client.Audio.Midi
             }
         }
 
-        private readonly List<MidiRenderer> _renderers = new();
+        [ViewVariables]
+        private readonly List<IMidiRenderer> _renderers = new();
 
         private bool _alive = true;
         private Settings? _settings;
         private Thread? _midiThread;
         private ISawmill _midiSawmill = default!;
+        private float _volume = 0f;
+        private bool _volumeDirty = true;
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        public float Volume
+        {
+            get => _volume;
+            set
+            {
+                if (MathHelper.CloseToPercent(_volume, value))
+                    return;
+
+                _cfgMan.SetCVar(CVars.MidiVolume, value);
+                _volumeDirty = true;
+            }
+        }
 
         private static readonly string[] LinuxSoundfonts =
         {
@@ -104,7 +117,7 @@ namespace Robust.Client.Audio.Midi
         private const string OsxSoundfont =
             "/System/Library/Components/CoreAudio.component/Contents/Resources/gs_instruments.dls";
 
-        private const string FallbackSoundfont = "/Resources/Midi/fallback.sf2";
+        private const string FallbackSoundfont = "/Midi/fallback.sf2";
 
         private readonly ResourceLoaderCallbacks _soundfontLoaderCallbacks = new();
 
@@ -114,12 +127,19 @@ namespace Robust.Client.Audio.Midi
         private NFluidsynth.Logger.LoggerDelegate _loggerDelegate = default!;
         private ISawmill _sawmill = default!;
 
+        [ViewVariables(VVAccess.ReadWrite)]
         public int OcclusionCollisionMask { get; set; }
 
         private void InitializeFluidsynth()
         {
             if (FluidsynthInitialized || _failedInitialize) return;
 
+            _cfgMan.OnValueChanged(CVars.MidiVolume, value =>
+            {
+                _volume = value;
+                _volumeDirty = true;
+            }, true);
+
             _midiSawmill = Logger.GetSawmill("midi");
             _sawmill = Logger.GetSawmill("midi.fluidsynth");
             _loggerDelegate = LoggerDelegate;
@@ -155,6 +175,7 @@ namespace Robust.Client.Audio.Midi
             _midiThread = new Thread(ThreadUpdate);
             _midiThread.Start();
 
+            _broadPhaseSystem = EntitySystem.Get<SharedBroadphaseSystem>();
             FluidsynthInitialized = true;
         }
 
@@ -171,18 +192,6 @@ namespace Robust.Client.Audio.Midi
             _sawmill.Log(rLevel, message);
         }
 
-        /*
-        public bool IsMidiFile(string filename)
-        {
-            return SoundFont.IsMidiFile(filename);
-        }
-
-        public bool IsSoundfontFile(string filename)
-        {
-            return SoundFont.IsSoundFont(filename);
-        }
-        */
-
         public IMidiRenderer? GetNewRenderer()
         {
             if (!FluidsynthInitialized)
@@ -207,19 +216,16 @@ namespace Robust.Client.Audio.Midi
 
                 var renderer = new MidiRenderer(_settings!, soundfontLoader);
 
-                foreach (var file in _resourceManager.ContentFindFiles(new ResourcePath("/Audio/MidiCustom/")))
+                foreach (var file in _resourceManager.ContentFindFiles(("/Audio/MidiCustom/")))
                 {
                     if (file.Extension != "sf2" && file.Extension != "dls") continue;
-                    if (_resourceManager.TryGetDiskFilePath(file, out var path))
-                    {
-                        renderer.LoadSoundfont(path);
-                    }
+                    renderer.LoadSoundfont(file.ToString());
                 }
 
                 // Since the last loaded soundfont takes priority, we load the fallback soundfont before the soundfont.
                 renderer.LoadSoundfont(FallbackSoundfont);
 
-                if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
+                if (OperatingSystem.IsLinux())
                 {
                     foreach (var filepath in LinuxSoundfonts)
                     {
@@ -237,19 +243,21 @@ namespace Robust.Client.Audio.Midi
                         break;
                     }
                 }
-                else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+                else if (OperatingSystem.IsMacOS())
                 {
                     if (File.Exists(OsxSoundfont) && SoundFont.IsSoundFont(OsxSoundfont))
                         renderer.LoadSoundfont(OsxSoundfont, true);
                 }
-                else if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+                else if (OperatingSystem.IsWindows())
                 {
                     if (File.Exists(WindowsSoundfont) && SoundFont.IsSoundFont(WindowsSoundfont))
                         renderer.LoadSoundfont(WindowsSoundfont, true);
                 }
 
                 lock (_renderers)
+                {
                     _renderers.Add(renderer);
+                }
 
                 return renderer;
             }
@@ -267,69 +275,79 @@ namespace Robust.Client.Audio.Midi
             }
 
             // Update positions of streams every frame.
-            lock (_renderers)
-                foreach (var renderer in _renderers)
+            foreach (var renderer in _renderers)
+            {
+                if (renderer.Disposed)
+                    continue;
+
+                if(_volumeDirty)
+                    renderer.Source.SetVolume(Volume);
+
+                if (!renderer.Mono)
                 {
-                    if (renderer.Disposed)
-                        continue;
-
-                    if (!renderer.Mono)
-                    {
-                        renderer.Source.SetGlobal();
-                        continue;
-                    }
-
-                    MapCoordinates? mapPos = null;
-                    if (renderer.TrackingCoordinates != null)
-                    {
-                        mapPos = renderer.TrackingCoordinates.Value.ToMap(_entityManager);
-                    }
-                    else if (renderer.TrackingEntity != null)
-                    {
-                        mapPos = renderer.TrackingEntity.Transform.MapPosition;
-                    }
-
-                    if (mapPos != null)
-                    {
-                        var pos = mapPos.Value;
-                        if (pos.MapId != _eyeManager.CurrentMap)
-                        {
-                            renderer.Source.SetVolume(-10000000);
-                        }
-                        else
-                        {
-                            var sourceRelative = _eyeManager.CurrentEye.Position.Position - pos.Position;
-                            var occlusion = 0f;
-                            if (sourceRelative.Length > 0)
-                            {
-                                occlusion = IoCManager.Resolve<IPhysicsManager>().IntersectRayPenetration(
-                                    pos.MapId,
-                                    new CollisionRay(
-                                        pos.Position,
-                                        sourceRelative.Normalized,
-                                        OcclusionCollisionMask),
-                                    sourceRelative.Length,
-                                    renderer.TrackingEntity);
-                            }
-                            renderer.Source.SetOcclusion(occlusion);
-                        }
-
-                        if (renderer.Source.SetPosition(pos.Position))
-                        {
-                            continue;
-                        }
-
-                        if (float.IsNaN(pos.Position.X) || float.IsNaN(pos.Position.Y))
-                        {
-                            // just duck out instead of move to NaN
-                            renderer.Source.SetOcclusion(float.MaxValue);
-                            continue;
-                        }
-
-                        _midiSawmill?.Warning("Interrupting positional audio, can't set position.");
-                        renderer.Source.StopPlaying();
-                    }
+                    renderer.Source.SetGlobal();
+                    continue;
                 }
+
+                MapCoordinates? mapPos = null;
+                if (renderer.TrackingCoordinates != null)
+                {
+                    mapPos = renderer.TrackingCoordinates.Value.ToMap(_entityManager);
+                }
+                else if (renderer.TrackingEntity != null)
+                {
+                    mapPos = renderer.TrackingEntity.Transform.MapPosition;
+                }
+
+                if (mapPos != null)
+                {
+                    var pos = mapPos.Value;
+                    if (pos.MapId != _eyeManager.CurrentMap)
+                    {
+                        renderer.Source.SetVolume(-10000000);
+                    }
+                    else
+                    {
+                        var sourceRelative = _eyeManager.CurrentEye.Position.Position - pos.Position;
+                        var occlusion = 0f;
+                        if (sourceRelative.Length > 0)
+                        {
+                            occlusion = _broadPhaseSystem.IntersectRayPenetration(
+                                pos.MapId,
+                                new CollisionRay(
+                                    pos.Position,
+                                    sourceRelative.Normalized,
+                                    OcclusionCollisionMask),
+                                sourceRelative.Length,
+                                renderer.TrackingEntity);
+                        }
+
+                        renderer.Source.SetOcclusion(occlusion);
+                    }
+
+                    if (renderer.Source.SetPosition(pos.Position))
+                    {
+                        continue;
+                    }
+
+                    if (renderer.TrackingEntity != null)
+                    {
+                        renderer.Source.SetVelocity(renderer.TrackingEntity.GlobalLinearVelocity());
+                    }
+
+                    if (float.IsNaN(pos.Position.X) || float.IsNaN(pos.Position.Y))
+                    {
+                        // just duck out instead of move to NaN
+                        renderer.Source.SetOcclusion(float.MaxValue);
+                        continue;
+                    }
+
+                    _midiSawmill?.Warning("Interrupting positional audio, can't set position.");
+                    renderer.Source.StopPlaying();
+                }
+            }
+
+            _volumeDirty = false;
         }
 
         /// <summary>
@@ -340,6 +358,7 @@ namespace Robust.Client.Audio.Midi
             while (_alive)
             {
                 lock (_renderers)
+                {
                     for (var i = 0; i < _renderers.Count; i++)
                     {
                         var renderer = _renderers[i];
@@ -347,23 +366,28 @@ namespace Robust.Client.Audio.Midi
                             renderer.Render();
                         else
                         {
-                            ((IMidiRenderer)renderer).InternalDispose();
+                            renderer.InternalDispose();
                             _renderers.Remove(renderer);
                         }
                     }
+                }
 
                 Thread.Sleep(1);
             }
         }
 
-        public void Dispose()
+        public void Shutdown()
         {
             _alive = false;
             _midiThread?.Join();
             _settings?.Dispose();
-            foreach (var renderer in _renderers)
+
+            lock (_renderers)
             {
-                renderer?.Dispose();
+                foreach (var renderer in _renderers)
+                {
+                    renderer?.Dispose();
+                }
             }
 
             if (FluidsynthInitialized && !_failedInitialize)
@@ -382,10 +406,18 @@ namespace Robust.Client.Audio.Midi
 
             public override IntPtr Open(string filename)
             {
-                Stream? stream;
-                if (filename.StartsWith("/Resources/"))
+                if (string.IsNullOrEmpty(filename))
                 {
-                    if (!IoCManager.Resolve<IResourceCache>().TryContentFileRead(filename.Substring(10), out stream))
+                    return IntPtr.Zero;
+                }
+
+                Stream? stream;
+                var resourceCache = IoCManager.Resolve<IResourceCache>();
+                var resourcePath = new ResourcePath(filename);
+
+                if (resourcePath.IsRooted && resourceCache.ContentFileExists(filename))
+                {
+                    if (!resourceCache.TryContentFileRead(filename, out stream))
                         return IntPtr.Zero;
                 }
                 else if (File.Exists(filename))
@@ -410,6 +442,7 @@ namespace Robust.Client.Audio.Midi
                 var span = new Span<byte>(buf.ToPointer(), length);
                 var stream = _openStreams[(int) sfHandle];
 
+                // Fluidsynth's docs state that this method should leave the buffer unmodified if it fails. (returns -1)
                 try
                 {
                     // Fluidsynth does a LOT of tiny allocations (frankly, way too much).
@@ -433,6 +466,7 @@ namespace Robust.Client.Audio.Midi
                 {
                     return -1;
                 }
+
                 return 0;
             }
 
@@ -454,10 +488,12 @@ namespace Robust.Client.Audio.Midi
 
             public override int Close(IntPtr sfHandle)
             {
-                var stream = _openStreams[(int) sfHandle];
+                if (!_openStreams.Remove((int) sfHandle, out var stream))
+                    return -1;
+
                 stream.Dispose();
-                _openStreams.Remove((int) sfHandle);
                 return 0;
+
             }
         }
     }

Robust.Client/Audio/Midi/MidiRenderer.cs

@@ -1,15 +1,13 @@
 using System;
-using System.IO;
-using System.Runtime.Intrinsics.X86;
 using NFluidsynth;
-using Robust.Client.Interfaces.Graphics;
+using Robust.Client.Graphics;
 using Robust.Shared.Asynchronous;
-using Robust.Shared.Interfaces.GameObjects;
-using Robust.Shared.Interfaces.Log;
+using Robust.Shared.GameObjects;
 using Robust.Shared.IoC;
 using Robust.Shared.Log;
 using Robust.Shared.Map;
-using Robust.Shared.Utility;
+using Robust.Shared.Maths;
+using Robust.Shared.ViewVariables;
 using MidiEvent = NFluidsynth.MidiEvent;
 
 namespace Robust.Client.Audio.Midi
@@ -23,6 +21,17 @@ namespace Robust.Client.Audio.Midi
 
     public interface IMidiRenderer : IDisposable
     {
+
+        /// <summary>
+        ///     The buffered audio source of this renderer.
+        /// </summary>
+        internal IClydeBufferedAudioSource Source { get; }
+
+        /// <summary>
+        ///     Whether this renderer has been disposed or not.
+        /// </summary>
+        bool Disposed { get; }
+
         /// <summary>
         ///     This controls whether the midi file being played will loop or not.
         /// </summary>
@@ -72,9 +81,9 @@ namespace Robust.Client.Audio.Midi
         int PlayerTotalTick { get; }
 
         /// <summary>
-        ///     Gets the current tick of the MIDI player.
+        ///     Gets or sets (seeks) the current tick of the MIDI player.
         /// </summary>
-        int PlayerTick { get; }
+        int PlayerTick { get; set; }
 
         /// <summary>
         ///     Gets the current tick of the sequencer.
@@ -112,6 +121,11 @@ namespace Robust.Client.Audio.Midi
         /// </summary>
         void StopAllNotes();
 
+        /// <summary>
+        ///     Render and play MIDI to the audio source.
+        /// </summary>
+        internal void Render();
+
         /// <summary>
         ///     Loads a new soundfont into the renderer.
         /// </summary>
@@ -161,7 +175,7 @@ namespace Robust.Client.Audio.Midi
         internal void InternalDispose();
     }
 
-    public class MidiRenderer : IMidiRenderer
+    internal class MidiRenderer : IMidiRenderer
     {
         [Dependency] private readonly IClydeAudio _clydeAudio = default!;
         [Dependency] private readonly ITaskManager _taskManager = default!;
@@ -188,60 +202,90 @@ namespace Robust.Client.Audio.Midi
         private const int SampleRate = 44100;
         private const int Buffers = SampleRate / 2205;
         private readonly object _playerStateLock = new();
+        private bool _debugEvents = false;
         private SequencerClientId _synthRegister;
+        private SequencerClientId _debugRegister;
         public IClydeBufferedAudioSource Source { get; set; }
+        IClydeBufferedAudioSource IMidiRenderer.Source => Source;
+
+        [ViewVariables]
         public bool Disposed { get; private set; } = false;
 
+        [ViewVariables(VVAccess.ReadWrite)]
         public byte MidiProgram
         {
             get => _midiProgram;
             set
             {
                 lock (_playerStateLock)
-                    for (var i = 0; i < 16; i++)
+                    for (var i = 0; i < _synth.MidiChannelCount; i++)
                         _synth.ProgramChange(i, value);
 
                 _midiProgram = value;
             }
         }
 
+        [ViewVariables(VVAccess.ReadWrite)]
         public byte MidiBank
         {
             get => _midiBank;
             set
             {
                 lock (_playerStateLock)
-                    for (var i = 0; i < 16; i++)
+                    for (var i = 0; i < _synth.MidiChannelCount; i++)
                         _synth.BankSelect(i, value);
 
                 _midiBank = value;
             }
         }
 
+        [ViewVariables(VVAccess.ReadWrite)]
         public uint MidiSoundfont
         {
             get => _midiSoundfont;
             set
             {
                 lock (_playerStateLock)
-                    for (var i = 0; i < 16; i++)
+                    for (var i = 0; i < _synth.MidiChannelCount; i++)
                         _synth.SoundFontSelect(i, value);
 
                 _midiSoundfont = value;
             }
         }
 
+        [ViewVariables(VVAccess.ReadWrite)]
         public bool DisablePercussionChannel { get; set; } = true;
+
+        [ViewVariables(VVAccess.ReadWrite)]
         public bool DisableProgramChangeEvent { get; set; } = true;
 
+        [ViewVariables(VVAccess.ReadWrite)]
         public int PlayerTotalTick => _player?.GetTotalTicks ?? 0;
-        public int PlayerTick => _player?.CurrentTick ?? 0;
+
+        [ViewVariables(VVAccess.ReadWrite)]
+        public int PlayerTick
+        {
+            get => _player?.CurrentTick ?? 0;
+            set
+            {
+                lock (_playerStateLock)
+                    _player?.Seek(Math.Max(Math.Min(value, PlayerTotalTick), 0));
+            }
+        }
+
+        [ViewVariables(VVAccess.ReadWrite)]
         public uint SequencerTick => _sequencer?.Tick ?? 0;
+
+        [ViewVariables(VVAccess.ReadWrite)]
         public double SequencerTimeScale => _sequencer?.TimeScale ?? 0;
 
+        [ViewVariables(VVAccess.ReadWrite)]
         public bool Mono { get; set; }
+
+        [ViewVariables]
         public MidiRendererStatus Status { get; private set; } = MidiRendererStatus.None;
 
+        [ViewVariables(VVAccess.ReadWrite)]
         public bool LoopMidi
         {
             get => _loopMidi;
@@ -253,10 +297,11 @@ namespace Robust.Client.Audio.Midi
             }
         }
 
+        [ViewVariables(VVAccess.ReadWrite)]
         public IEntity? TrackingEntity { get; set; } = null;
-        public EntityCoordinates? TrackingCoordinates { get; set; } = null;
 
-        internal bool Free { get; set; } = false;
+        [ViewVariables(VVAccess.ReadWrite)]
+        public EntityCoordinates? TrackingCoordinates { get; set; } = null;
 
         internal MidiRenderer(Settings settings, SoundFontLoader soundFontLoader, bool mono = true)
         {
@@ -269,6 +314,7 @@ namespace Robust.Client.Audio.Midi
             _soundFontLoader = soundFontLoader;
             _synth = new Synth(_settings);
             _sequencer = new Sequencer(false);
+            _debugRegister = _sequencer.RegisterClient("honk", DumpSequencerEvent);
             _synthRegister = _sequencer.RegisterFluidsynth(_synth);
 
             _synth.AddSoundFontLoader(soundFontLoader);
@@ -278,6 +324,27 @@ namespace Robust.Client.Audio.Midi
             Source.StartPlaying();
         }
 
+        private void DumpSequencerEvent(uint time, SequencerEvent @event)
+        {
+            // ReSharper disable once UseStringInterpolation
+            _midiSawmill.Debug(string.Format(
+                "{0:D8}: {1} chan:{2:D2} key:{3:D5} bank:{4:D2} ctrl:{5:D5} dur:{6:D5} pitch:{7:D5} prog:{8:D3} val:{9:D5} vel:{10:D5}",
+                time,
+                @event.Type.ToString().PadLeft(22),
+                @event.Channel,
+                @event.Key,
+                @event.Bank,
+                @event.Control,
+                @event.Duration,
+                @event.Pitch,
+                @event.Program,
+                @event.Value,
+                @event.Velocity));
+
+            @event.Dest = _synthRegister;
+            _sequencer.SendNow(@event);
+        }
+
         public bool OpenInput()
         {
             if (Disposed)
@@ -287,7 +354,11 @@ namespace Robust.Client.Audio.Midi
             Status = MidiRendererStatus.Input;
             StopAllNotes();
 
-            _driver = new MidiDriver(_settings, MidiDriverEventHandler);
+            lock (_playerStateLock)
+            {
+                _driver = new MidiDriver(_settings, MidiDriverEventHandler);
+            }
+
             return true;
         }
 
@@ -310,9 +381,8 @@ namespace Robust.Client.Audio.Midi
 
             lock (_playerStateLock)
             {
-                if (_player == null)
-                    _player = new NFluidsynth.Player(_synth);
-                _player.Stop();
+                _player?.Dispose();
+                _player = new NFluidsynth.Player(_synth);
                 _player.AddMem(buffer);
                 _player.SetPlaybackCallback(MidiPlayerEventHandler);
                 _player.Play();
@@ -326,8 +396,13 @@ namespace Robust.Client.Audio.Midi
         {
             if (Status != MidiRendererStatus.Input) return false;
             Status = MidiRendererStatus.None;
-            _driver?.Dispose();
-            _driver = null;
+
+            lock (_playerStateLock)
+            {
+                _driver?.Dispose();
+                _driver = null;
+            }
+
             StopAllNotes();
             return true;
         }
@@ -351,10 +426,8 @@ namespace Robust.Client.Audio.Midi
 
         public void StopAllNotes()
         {
-            for (var i = 0; i < 16; i++)
-            {
-                _synth.AllNotesOff(i);
-            }
+            lock(_playerStateLock)
+                _synth.AllNotesOff(-1);
         }
 
         public void LoadSoundfont(string filename, bool resetPresets = false)
@@ -369,13 +442,15 @@ namespace Robust.Client.Audio.Midi
         public event Action<Shared.Audio.Midi.MidiEvent>? OnMidiEvent;
         public event Action? OnMidiPlayerFinished;
 
-        internal void Render(int length = SampleRate / 250)
+        void IMidiRenderer.Render()
+        {
+            Render();
+        }
+
+        private void Render(int length = SampleRate / 250)
         {
             if (Disposed) return;
 
-            // SSE needs this.
-            DebugTools.Assert(length % 4 == 0, "Sample length must be multiple of 4");
-
             var buffersProcessed = Source.GetNumberOfBuffersProcessed();
             if(buffersProcessed == Buffers) _midiSawmill.Warning("MIDI buffer overflow!");
             if (buffersProcessed == 0) return;
@@ -390,36 +465,16 @@ namespace Robust.Client.Audio.Midi
                 Source.GetBuffersProcessed(buffers);
 
                 lock (_playerStateLock)
+                {
+                    // _sequencer.Process(10);
                     _synth?.WriteSampleFloat(length * buffers.Length, audio, 0, Mono ? 1 : 2,
                         audio, Mono ? length * buffers.Length : 1, Mono ? 1 : 2);
-
+                }
                 if (Mono) // Turn audio to mono
                 {
                     var l = length * buffers.Length;
 
-                    if (Sse.IsSupported)
-                    {
-                        fixed (float* ptr = audio)
-                        {
-                            for (var j = 0; j < l; j += 4)
-                            {
-                                var k = j + l;
-
-                                var jV = Sse.LoadVector128(ptr + j);
-                                var kV = Sse.LoadVector128(ptr + k);
-
-                                Sse.Store(j + ptr, Sse.Add(jV, kV));
-                            }
-                        }
-                    }
-                    else
-                    {
-                        for (var j = 0; j < l; j++)
-                        {
-                            var k = j + l;
-                            audio[j] = ((audio[k] + audio[j]));
-                        }
-                    }
+                    NumericsHelpers.Add(audio[..l], audio[l..]);
                 }
 
                 for (var i = 0; i < buffers.Length; i++)
@@ -449,6 +504,7 @@ namespace Robust.Client.Audio.Midi
             var timestamp = SequencerTick;
             var midiEv = (Shared.Audio.Midi.MidiEvent) midiEvent;
             midiEv.Tick = timestamp;
+            midiEvent.Dispose();
             SendMidiEvent(midiEv);
             return 0;
         }
@@ -459,6 +515,7 @@ namespace Robust.Client.Audio.Midi
             var timestamp = SequencerTick;
             var midiEv = (Shared.Audio.Midi.MidiEvent) midiEvent;
             midiEv.Tick = timestamp;
+            midiEvent.Dispose();
             SendMidiEvent(midiEv);
             return 0;
         }
@@ -475,22 +532,16 @@ namespace Robust.Client.Audio.Midi
                 lock(_playerStateLock)
                     switch (midiEvent.Type)
                     {
-                        // Sometimes MIDI files spam these for no good reason and I can't find any info on what they are.
-                        case 1:
-                        case 5:
-                        case 81:
-                            break;
-
-                        // Note On 0x80
-                        case 144:
-                            _synth.NoteOn(midiEvent.Channel, midiEvent.Key, midiEvent.Velocity);
-                            break;
-
-                        // Note Off - 0x90
+                        // Note Off - 0x80
                         case 128:
                             _synth.NoteOff(midiEvent.Channel, midiEvent.Key);
                             break;
 
+                        // Note On 0x90
+                        case 144:
+                            _synth.NoteOn(midiEvent.Channel, midiEvent.Key, midiEvent.Velocity);
+                            break;
+
                         // After Touch - 0xA
                         case 160:
                             _synth.KeyPressure(midiEvent.Channel, midiEvent.Key, midiEvent.Value);
@@ -503,8 +554,10 @@ namespace Robust.Client.Audio.Midi
 
                         // Program Change - 0xC0
                         case 192:
-                            if(!DisableProgramChangeEvent)
+                            if (!DisableProgramChangeEvent)
                                 _synth.ProgramChange(midiEvent.Channel, midiEvent.Program);
+                            else
+                                return;
                             break;
 
                         // Channel Pressure - 0xD0
@@ -517,13 +570,27 @@ namespace Robust.Client.Audio.Midi
                             _synth.PitchBend(midiEvent.Channel, midiEvent.Pitch);
                             break;
 
+                        // Sometimes MIDI files spam these for no good reason and I can't find any info on what they are.
+                        case 1:
+                        case 5:
+                        // MetaEvent -- SetTempo - 0x51
+                        case 81:
+                            // Already handled by the player.
+                            return;
                         // System Messages - 0xF0
                         case 240:
+                            switch ((byte)midiEvent.Control)
+                            {
+                                case 11:
+                                    _synth.AllNotesOff(midiEvent.Channel);
+                                    break;
+                            }
+
                             break;
 
                         default:
                             _midiSawmill.Warning("Unhandled midi event of type {0}", midiEvent.Type, midiEvent);
-                            break;
+                            return;
                     }
             }
             catch (FluidSynthInteropException)
@@ -540,7 +607,7 @@ namespace Robust.Client.Audio.Midi
             if (Disposed) return;
 
             var seqEv = (SequencerEvent) midiEvent;
-            seqEv.Dest = _synthRegister;
+            seqEv.Dest = _debugEvents ? _debugRegister : _synthRegister;
             _sequencer.SendAt(seqEv, time, absolute);
         }
 
@@ -563,10 +630,15 @@ namespace Robust.Client.Audio.Midi
         void IMidiRenderer.InternalDispose()
         {
             Source?.Dispose();
+            _driver?.Dispose();
+
+            // Do NOT dispose of the sequencer after the synth or it'll cause a segfault for some fucking reason.
+            _sequencer?.UnregisterClient(_debugRegister);
+            _sequencer?.UnregisterClient(_synthRegister);
+            _sequencer?.Dispose();
+
             _synth?.Dispose();
             _player?.Dispose();
-            _driver?.Dispose();
-            _sequencer?.Dispose();
         }
     }
 }

Robust.Client/BaseClient.cs

@@ -1,21 +1,20 @@
 using System;
 using System.Net;
-using Robust.Client.Interfaces;
-using Robust.Client.Interfaces.Debugging;
-using Robust.Client.Interfaces.GameObjects;
-using Robust.Client.Interfaces.GameStates;
-using Robust.Client.Interfaces.Utility;
+using Robust.Client.Debugging;
+using Robust.Client.GameObjects;
+using Robust.Client.GameStates;
 using Robust.Client.Player;
+using Robust.Client.Utility;
 using Robust.Shared;
+using Robust.Shared.Configuration;
 using Robust.Shared.Enums;
-using Robust.Shared.Interfaces.Configuration;
-using Robust.Shared.Interfaces.Map;
-using Robust.Shared.Interfaces.Network;
-using Robust.Shared.Interfaces.Timing;
+using Robust.Shared.GameObjects;
 using Robust.Shared.IoC;
 using Robust.Shared.Log;
+using Robust.Shared.Map;
 using Robust.Shared.Network;
-using Robust.Shared.Network.Messages;
+using Robust.Shared.Players;
+using Robust.Shared.Timing;
 using Robust.Shared.Utility;
 
 namespace Robust.Client
@@ -25,8 +24,9 @@ namespace Robust.Client
     {
         [Dependency] private readonly IClientNetManager _net = default!;
         [Dependency] private readonly IPlayerManager _playMan = default!;
-        [Dependency] private readonly IConfigurationManager _configManager = default!;
+        [Dependency] private readonly INetConfigurationManager _configManager = default!;
         [Dependency] private readonly IClientEntityManager _entityManager = default!;
+        [Dependency] private readonly IEntityLookup _entityLookup = default!;
         [Dependency] private readonly IMapManager _mapManager = default!;
         [Dependency] private readonly IDiscordRichPresence _discord = default!;
         [Dependency] private readonly IGameTiming _timing = default!;
@@ -50,18 +50,28 @@ namespace Robust.Client
         /// <inheritdoc />
         public void Initialize()
         {
-            _net.RegisterNetMessage<MsgServerInfo>(MsgServerInfo.NAME, HandleServerInfo);
-            _net.RegisterNetMessage<MsgSetTickRate>(MsgSetTickRate.NAME, HandleSetTickRate);
-            _net.RegisterNetMessage<MsgServerInfoReq>(MsgServerInfoReq.NAME);
             _net.Connected += OnConnected;
             _net.ConnectFailed += OnConnectFailed;
             _net.Disconnect += OnNetDisconnect;
 
+            _configManager.OnValueChanged(CVars.NetTickrate, TickRateChanged, invokeImmediately: true);
+
             _playMan.Initialize();
             _debugDrawMan.Initialize();
             Reset();
         }
 
+        private void TickRateChanged(int tickrate)
+        {
+            if (GameInfo != null)
+            {
+                GameInfo.TickRate = (byte) tickrate;
+            }
+
+            _timing.TickRate = (byte) tickrate;
+            Logger.InfoS("client", $"Tickrate changed to: {tickrate} on tick {_timing.CurTick}");
+        }
+
         /// <inheritdoc />
         public void ConnectToServer(DnsEndPoint endPoint)
         {
@@ -89,6 +99,25 @@ namespace Robust.Client
             _net.ClientDisconnect(reason);
         }
 
+        /// <inheritdoc />
+        public void StartSinglePlayer()
+        {
+            DebugTools.Assert(RunLevel < ClientRunLevel.Connecting);
+            DebugTools.Assert(!_net.IsConnected);
+            _playMan.Startup();
+            _playMan.LocalPlayer!.Name = PlayerNameOverride ?? _configManager.GetCVar(CVars.PlayerName);
+            OnRunLevelChanged(ClientRunLevel.SinglePlayerGame);
+            GameStartedSetup();
+        }
+
+        /// <inheritdoc />
+        public void StopSinglePlayer()
+        {
+            DebugTools.Assert(RunLevel == ClientRunLevel.SinglePlayerGame);
+            DebugTools.Assert(!_net.IsConnected);
+            GameStoppedReset();
+        }
+
         /// <inheritdoc />
         public event EventHandler<RunLevelChangedEventArgs>? RunLevelChanged;
 
@@ -98,9 +127,39 @@ namespace Robust.Client
 
         private void OnConnected(object? sender, NetChannelArgs args)
         {
-            // request base info about the server
-            var msgInfo = _net.CreateNetMessage<MsgServerInfoReq>();
-            _net.ClientSendMessage(msgInfo);
+            _configManager.SyncWithServer();
+            _configManager.ReceivedInitialNwVars += OnReceivedClientData;
+        }
+
+        private void OnReceivedClientData(object? sender, EventArgs e)
+        {
+            _configManager.ReceivedInitialNwVars -= OnReceivedClientData;
+
+            var info = GameInfo;
+
+            var serverName = _configManager.GetCVar<string>("game.hostname");
+            if (info == null)
+            {
+                GameInfo = info = new ServerInfo(serverName);
+            }
+            else
+            {
+                info.ServerName = serverName;
+            }
+
+            var maxPlayers = _configManager.GetCVar<int>("game.maxplayers");
+            info.ServerMaxPlayers = maxPlayers;
+
+            var userName = _net.ServerChannel!.UserName;
+            var userId = _net.ServerChannel.UserId;
+            _discord.Update(info.ServerName, userName, info.ServerMaxPlayers.ToString());
+            // start up player management
+            _playMan.Startup();
+
+            _playMan.LocalPlayer!.UserId = userId;
+            _playMan.LocalPlayer.Name = userName;
+
+            _playMan.LocalPlayer.StatusChanged += OnLocalStatusChanged;
         }
 
         /// <summary>
@@ -108,16 +167,13 @@ namespace Robust.Client
         ///     receiving states when they join the lobby.
         /// </summary>
         /// <param name="session">Session of the player.</param>
-        private void OnPlayerJoinedServer(IPlayerSession session)
+        private void OnPlayerJoinedServer(ICommonSession session)
         {
             DebugTools.Assert(RunLevel < ClientRunLevel.Connected);
             OnRunLevelChanged(ClientRunLevel.Connected);
 
-            _entityManager.Startup();
-            _mapManager.Startup();
+            GameStartedSetup();
 
-            _timing.ResetSimTime();
-            _timing.Paused = false;
             PlayerJoinedServer?.Invoke(this, new PlayerEventArgs(session));
         }
 
@@ -125,7 +181,7 @@ namespace Robust.Client
         ///     Player is joining the game
         /// </summary>
         /// <param name="session">Session of the player.</param>
-        private void OnPlayerJoinedGame(IPlayerSession session)
+        private void OnPlayerJoinedGame(ICommonSession session)
         {
             DebugTools.Assert(RunLevel >= ClientRunLevel.Connected);
             OnRunLevelChanged(ClientRunLevel.InGame);
@@ -135,6 +191,7 @@ namespace Robust.Client
 
         private void Reset()
         {
+            _configManager.ClearReceivedInitialNwVars();
             OnRunLevelChanged(ClientRunLevel.Initialize);
         }
 
@@ -151,51 +208,31 @@ namespace Robust.Client
             PlayerLeaveServer?.Invoke(this, new PlayerEventArgs(_playMan.LocalPlayer?.Session));
 
             LastDisconnectReason = args.Reason;
+            GameStoppedReset();
+        }
 
+        private void GameStartedSetup()
+        {
+            _entityManager.Startup();
+            _mapManager.Startup();
+            _entityLookup.Startup();
+
+            _timing.ResetSimTime();
+            _timing.Paused = false;
+        }
+
+        private void GameStoppedReset()
+        {
+            IoCManager.Resolve<INetConfigurationManager>().FlushMessages();
             _gameStates.Reset();
             _playMan.Shutdown();
+            _entityLookup.Shutdown();
             _entityManager.Shutdown();
             _mapManager.Shutdown();
             _discord.ClearPresence();
             Reset();
         }
 
-        private void HandleServerInfo(MsgServerInfo msg)
-        {
-            var info = GameInfo;
-
-            if (info == null)
-            {
-                GameInfo = info = new ServerInfo(msg.ServerName);
-            }
-            else
-            {
-                info.ServerName = msg.ServerName;
-            }
-
-            info.ServerMaxPlayers = msg.ServerMaxPlayers;
-            info.TickRate = msg.TickRate;
-            _timing.TickRate = msg.TickRate;
-            Logger.InfoS("client", $"Tickrate changed to: {msg.TickRate}");
-
-            var userName = msg.MsgChannel.UserName;
-            var userId = msg.MsgChannel.UserId;
-            _discord.Update(info.ServerName, userName, info.ServerMaxPlayers.ToString());
-            // start up player management
-            _playMan.Startup(_net.ServerChannel!);
-
-            _playMan.LocalPlayer!.UserId = userId;
-            _playMan.LocalPlayer.Name = userName;
-
-            _playMan.LocalPlayer.StatusChanged += OnLocalStatusChanged;
-        }
-
-        private void HandleSetTickRate(MsgSetTickRate message)
-        {
-            _timing.TickRate = message.NewTickRate;
-            Logger.InfoS("client", $"Tickrate changed to: {message.NewTickRate} on tick {_timing.CurTick}");
-        }
-
         private void OnLocalStatusChanged(object? obj, StatusEventArgs eventArgs)
         {
             // player finished fully connecting to the server.
@@ -246,6 +283,11 @@ namespace Robust.Client
         ///     The client is now in the game, moving around.
         /// </summary>
         InGame,
+
+        /// <summary>
+        ///     The client is now in singleplayer mode, in-game.
+        /// </summary>
+        SinglePlayerGame,
     }
 
     /// <summary>
@@ -256,12 +298,12 @@ namespace Robust.Client
         /// <summary>
         ///     The session that triggered the event.
         /// </summary>
-        private IPlayerSession? Session { get; }
+        private ICommonSession? Session { get; }
 
         /// <summary>
         ///     Constructs a new instance of the class.
         /// </summary>
-        public PlayerEventArgs(IPlayerSession? session)
+        public PlayerEventArgs(ICommonSession? session)
         {
             Session = session;
         }