-/*
- * Copyright (c) 2021 Samsung Electronics Co., Ltd.
- *
- * 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
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * 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.
- *
- */
-
-using System;
-using System.Reflection;
-
-namespace Tizen.NUI
-{
- internal sealed class WeakEventHandler<TEventArgs> where TEventArgs : EventArgs
- {
- private readonly WeakReference targetReference;
- private readonly MethodInfo method;
-
- public WeakEventHandler(EventHandler<TEventArgs> callback)
- {
- method = callback.GetMethodInfo();
- targetReference = new WeakReference(callback.Target, true);
- }
-
- public void Handler(object sender, TEventArgs e)
- {
- var target = targetReference.Target;
- if (target != null)
- {
- var callback = (Action<object, TEventArgs>)method.CreateDelegate(typeof(Action<object, TEventArgs>), target);
- if (callback != null)
- {
- callback(sender, e);
- }
- }
- }
- }
-}
-