/*

* Copyright (c) 2009 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 System.IO;

using System.Xml;

namespace SymbianTree

{

	public class SymDocument : SymNodeAddAsChild

	{

		#region Constructors

		public SymDocument()

            : this( Granularity )

		{

		}

        public SymDocument( int aGranularity )

            : this( aGranularity, null )

        {

        }

        public SymDocument( object aData )

            : this( Granularity, aData )

		{

		}

        public SymDocument( int aGranularity, object aData )

            : base( aData )

        {

            iCurrentNode = this;

            CreateChildrenListNow( aGranularity );

        }

        #endregion

		#region API

        public void SerializeToXml( string aFileName )

        {

            if ( File.Exists( aFileName ) )

            {

                File.Delete( aFileName );

            }

            using ( XmlTextWriter writer = new XmlTextWriter( aFileName, System.Text.Encoding.UTF8 ) )

            {

                writer.Formatting = Formatting.Indented;

                //

                try

                {

                    base.Serialize( writer );

                }

                catch ( XmlException )

                {

                }

            }

        }

		public void MakeParentCurrent()

		{

			System.Diagnostics.Debug.Assert( CurrentNode.HasParent );

			CurrentNode = CurrentNode.Parent;

		}

		#endregion

		#region Properties

		public SymNode CurrentNode

		{

			get { return iCurrentNode; }

			set

            {

                iPreviousCurrentNode = iCurrentNode;

                iCurrentNode = value;

            }

		}

        public SymNode PreviousCurrentNode

		{

            get { return iPreviousCurrentNode; }

		}

		#endregion

		#region Data members

		private SymNode iCurrentNode;

		private SymNode iPreviousCurrentNode;

		#endregion

	}

}