/*

* Copyright (c) 2004-2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

using System;

using SymBuildParsingLib.Tree;

using SymBuildParsingLib.Parser.Framework.Workers;

using SymBuildParsingLib.Parser.Framework.Nodes;

using SymbianTree;

namespace SymBuildParsingLib.Parser.Framework.Workers

{

	// NB: Used only for 'if', 'ifdef', 'ifndef' expressions.

	public class SymParserWorkerConditionalExpression : SymParserWorker

	{

		#region Constructors & destructor

		public SymParserWorkerConditionalExpression( SymParserWorkerContext aContext )

			: base( aContext )

		{

			SymNode node = new SymNodeConditionalExpression( aContext.CurrentToken );

			aContext.Document.CurrentNode.Add( node );

			// Make this child node the new parent

			aContext.Document.CurrentNode = node;

		}

		#endregion

		#region From SymParserWorker

		public override void RemoveChild( SymParserWorker aWorker )

		{

			base.RemoveChild( aWorker );

			RemoveSelf();

		}

		#endregion

		#region Utility functions

		public static SymNodeConditionalExpression FindMostRecentConditionalExpression( SymNode aCurrentNode )

		{

			SymNodeConditionalExpression ret = null;

			//

			SymNodeEnumeratorUpTreeSiblingsFirst iterator = new SymNodeEnumeratorUpTreeSiblingsFirst( aCurrentNode );

			//

			foreach( SymNode node in iterator )

			{

				if	( node is SymNodeConditionalExpression )

				{

					ret = (SymNodeConditionalExpression) node;

					break;

				}

			}

			//

			return ret;

		}

		#endregion

	}

}