feat: add document comments

Runtime/SkyHookManager.cs

@@ -7,14 +7,27 @@ namespace SkyHook
     {
         private static SkyHookManager _instance;
 
-    internal static bool IsFocused;
+        private static bool IsFocused;
 
-    public bool requireFocus = true;
+        /// <summary>
+        /// Whether or not the event will be received only if the game window is focused.
+        /// </summary>
+        // ReSharper disable once MemberCanBePrivate.Global
+        // ReSharper disable once FieldCanBeMadeReadOnly.Global
+        public static bool RequireFocus = true;
 
         private bool _started;
 
-    public static UnityEvent<SkyHookEvent> KeyUpdated = new();
+        /// <summary>
+        /// The key updated event data
+        /// </summary>
+        // ReSharper disable once MemberCanBePrivate.Global
+        public static readonly UnityEvent<SkyHookEvent> KeyUpdated = new();
 
+        /// <summary>
+        /// The instance of sky hook manager. The instance will be crated if it does not exist
+        /// </summary>
+        // ReSharper disable once MemberCanBePrivate.Global
         public static SkyHookManager Instance
         {
             get
@@ -33,6 +46,11 @@ namespace SkyHook
 
         private void HookCallback(SkyHookEvent ev)
         {
+            if (RequireFocus && !IsFocused)
+            {
+                return;
+            }
+
             KeyUpdated.Invoke(ev);
         }