Created unity project

3D FPS/Library/PackageCache/com.unity.collab-proxy@2.6.0/Editor/UI/EditorWindowFocus.cs

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+using System;
+
+using UnityEditor;
+using UnityEditorInternal;
+
+namespace Unity.PlasticSCM.Editor.UI
+{
+    internal static class EditorWindowFocus
+    {
+        internal static event Action OnApplicationActivated;
+        internal static event Action OnApplicationDeactivated;
+
+        static EditorWindowFocus()
+        {
+            EditorApplication.update += Update;
+        }
+
+        static void Update()
+        {
+            bool isApplicationActive = InternalEditorUtility.isApplicationActive;
+
+            if (!mLastIsApplicationFocused && isApplicationActive)
+            {
+                mLastIsApplicationFocused = isApplicationActive;
+
+                if (OnApplicationActivated != null)
+                    OnApplicationActivated();
+
+                return;
+            }
+
+            if (mLastIsApplicationFocused && !isApplicationActive)
+            {
+                mLastIsApplicationFocused = isApplicationActive;
+
+                if (OnApplicationDeactivated != null)
+                    OnApplicationDeactivated();
+
+                return;
+            }
+        }
+
+        static bool mLastIsApplicationFocused;
+    }
+}