undocontextguard.cs

代码模版 codtemplate

using System;
using EnvDTE;

namespace CodeTemplate
{
	/// <summary>
	/// Creates an undo context for "atomic" text buffer operations
	/// </summary>
	internal class UndoContextGuard: IDisposable
	{
		public UndoContextGuard(UndoContext context, String name)
		{
			m_context = context;
			m_wasOpened = m_context.IsOpen;

			if(!m_wasOpened)
				m_context.Open(name, false);
		}

		~UndoContextGuard()
		{
			Dispose(false);
		}

		public void Dispose()
		{
			Dispose(true);
			GC.SuppressFinalize(this);
		}

		protected virtual void Dispose(Boolean disposing)
		{
			if(!m_disposed)
			{
				if(m_context != null && !m_wasOpened)
					m_context.Close();
			}
      
			m_disposed = true;
		}

		private UndoContext m_context;
		private Boolean m_wasOpened;
		private Boolean m_disposed = false;
	}
}