Move solution and projects to src

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

@@ -0,0 +1,42 @@
+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();
+        }
+    }
+}