Move solution and projects to src

src/Ryujinx.HLE/HOS/SystemState/AppletStateMgr.cs

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+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy;
+using System.Collections.Concurrent;
+
+namespace Ryujinx.HLE.HOS.SystemState
+{
+    class AppletStateMgr
+    {
+        public ConcurrentQueue<AppletMessage> Messages { get; }
+
+        public FocusState FocusState { get; private set; }
+
+        public KEvent MessageEvent { get; }
+
+        public IdDictionary AppletResourceUserIds { get; }
+
+        public IdDictionary IndirectLayerHandles { get; }
+
+        public AppletStateMgr(Horizon system)
+        {
+            Messages     = new ConcurrentQueue<AppletMessage>();
+            MessageEvent = new KEvent(system.KernelContext);
+
+            AppletResourceUserIds = new IdDictionary();
+            IndirectLayerHandles = new IdDictionary();
+        }
+
+        public void SetFocus(bool isFocused)
+        {
+            FocusState = isFocused ? FocusState.InFocus : FocusState.OutOfFocus;
+
+            Messages.Enqueue(AppletMessage.FocusStateChanged);
+
+            if (isFocused)
+            {
+                Messages.Enqueue(AppletMessage.ChangeIntoForeground);
+            }
+
+            MessageEvent.ReadableEvent.Signal();
+        }
+    }
+}

src/Ryujinx.HLE/HOS/SystemState/ColorSet.cs

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+namespace Ryujinx.HLE.HOS.SystemState
+{
+    public enum ColorSet
+    {
+        BasicWhite = 0,
+        BasicBlack = 1
+    }
+}

src/Ryujinx.HLE/HOS/SystemState/KeyboardLayout.cs

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+namespace Ryujinx.HLE.HOS.SystemState
+{
+    // nn::settings::KeyboardLayout
+    public enum KeyboardLayout
+    {
+        Default = 0,
+        EnglishUs,
+        EnglishUsInternational,
+        EnglishUk,
+        French,
+        FrenchCa,
+        Spanish,
+        SpanishLatin,
+        German,
+        Italian,
+        Portuguese,
+        Russian,
+        Korean,
+        ChineseSimplified,
+        ChineseTraditional,
+
+        Min = Default,
+        Max = ChineseTraditional
+    }
+}

src/Ryujinx.HLE/HOS/SystemState/RegionCode.cs

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+namespace Ryujinx.HLE.HOS.SystemState
+{
+    // nn::settings::RegionCode
+    public enum RegionCode
+    {
+        Japan,
+        USA,
+        Europe,
+        Australia,
+        China,
+        Korea,
+        Taiwan,
+
+        Min = Japan,
+        Max = Taiwan
+    }
+}

src/Ryujinx.HLE/HOS/SystemState/SystemLanguage.cs

@@ -0,0 +1,24 @@
+namespace Ryujinx.HLE.HOS.SystemState
+{
+    public enum SystemLanguage
+    {
+        Japanese,
+        AmericanEnglish,
+        French,
+        German,
+        Italian,
+        Spanish,
+        Chinese,
+        Korean,
+        Dutch,
+        Portuguese,
+        Russian,
+        Taiwanese,
+        BritishEnglish,
+        CanadianFrench,
+        LatinAmericanSpanish,
+        SimplifiedChinese,
+        TraditionalChinese,
+        BrazilianPortuguese
+    }
+}

src/Ryujinx.HLE/HOS/SystemState/SystemStateMgr.cs

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+using System;
+
+namespace Ryujinx.HLE.HOS.SystemState
+{
+    public class SystemStateMgr
+    {
+        internal static string[] LanguageCodes = new string[]
+        {
+            "ja",
+            "en-US",
+            "fr",
+            "de",
+            "it",
+            "es",
+            "zh-CN",
+            "ko",
+            "nl",
+            "pt",
+            "ru",
+            "zh-TW",
+            "en-GB",
+            "fr-CA",
+            "es-419",
+            "zh-Hans",
+            "zh-Hant",
+            "pt-BR"
+        };
+
+        internal long DesiredKeyboardLayout { get; private set; }
+
+        internal SystemLanguage DesiredSystemLanguage { get; private set; }
+
+        internal long DesiredLanguageCode { get; private set; }
+
+        internal uint DesiredRegionCode { get; private set; }
+
+        public TitleLanguage DesiredTitleLanguage { get; private set; }
+
+        public bool DockedMode { get; set; }
+
+        public ColorSet ThemeColor { get; set; }
+
+        public string DeviceNickName { get; set; }
+
+        public SystemStateMgr()
+        {
+            // TODO: Let user specify fields.
+            DesiredKeyboardLayout = (long)KeyboardLayout.Default;
+            DeviceNickName        = "Ryujinx's Switch";
+        }
+
+        public void SetLanguage(SystemLanguage language)
+        {
+            DesiredSystemLanguage = language;
+            DesiredLanguageCode   = GetLanguageCode((int)DesiredSystemLanguage);
+
+            DesiredTitleLanguage = language switch
+            {
+                SystemLanguage.Taiwanese or
+                SystemLanguage.TraditionalChinese => TitleLanguage.TraditionalChinese,
+                SystemLanguage.Chinese or
+                SystemLanguage.SimplifiedChinese  => TitleLanguage.SimplifiedChinese,
+                _                                 => Enum.Parse<TitleLanguage>(Enum.GetName<SystemLanguage>(language)),
+            };
+        }
+
+        public void SetRegion(RegionCode region)
+        {
+            DesiredRegionCode = (uint)region;
+        }
+
+        internal static long GetLanguageCode(int index)
+        {
+            if ((uint)index >= LanguageCodes.Length)
+            {
+                throw new ArgumentOutOfRangeException(nameof(index));
+            }
+
+            long code  = 0;
+            int  shift = 0;
+
+            foreach (char chr in LanguageCodes[index])
+            {
+                code |= (long)(byte)chr << shift++ * 8;
+            }
+
+            return code;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/SystemState/TitleLanguage.cs

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+namespace Ryujinx.HLE.HOS.SystemState
+{
+    public enum TitleLanguage
+    {
+        AmericanEnglish,
+        BritishEnglish,
+        Japanese,
+        French,
+        German,
+        LatinAmericanSpanish,
+        Spanish,
+        Italian,
+        Dutch,
+        CanadianFrench,
+        Portuguese,
+        Russian,
+        Korean,
+        TraditionalChinese,
+        SimplifiedChinese,
+        BrazilianPortuguese
+    }
+}