ILSpy/AvalonEdit/ICSharpCode.AvalonEdit/Utils/DelayedEvents.cs

// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System;
using System.Collections.Generic;

namespace ICSharpCode.AvalonEdit.Utils
{
	/// <summary>
	/// Maintains a list of delayed events to raise.
	/// </summary>
	sealed class DelayedEvents
	{
		struct EventCall
		{
			EventHandler handler;
			object sender;
			EventArgs e;
			
			public EventCall(EventHandler handler, object sender, EventArgs e)
			{
				this.handler = handler;
				this.sender = sender;
				this.e = e;
			}
			
			public void Call()
			{
				handler(sender, e);
			}
		}
		
		Queue<EventCall> eventCalls = new Queue<EventCall>();
		
		public void DelayedRaise(EventHandler handler, object sender, EventArgs e)
		{
			if (handler != null) {
				eventCalls.Enqueue(new EventCall(handler, sender, e));
			}
		}
		
		public void RaiseEvents()
		{
			while (eventCalls.Count > 0)
				eventCalls.Dequeue().Call();
		}
	}
}