/*

* 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.Collections.Generic;

using System.Text;

using System.IO;

using SymbianUtils;

using SymbianUtils.Tracer;

using SymbianUtils.Streams;

using SymbianStructuresLib.Uids;

using SymbianStructuresLib.Compression.Common;

using SymbianImageLib.Common.Content;

using SymbianImageLib.Common.Image;

using SymbianImageLib.Common.Streams;

using SymbianImageLib.E32Image.Image;

using SymbianImageLib.E32Image.Content;

using SymbianImageLib.E32Image.Header;

using SymbianImageLib.ROFS.Image;

namespace SymbianImageLib.ROFS.Content

{

    public class SIContentROFSCode : SIContent

    {

        #region Constructors

        internal SIContentROFSCode( SIROFS aImage, string aName, uint aSize, long aPosition )

            : base( aImage )

        {

            // We need to give the E32Image access to the underlying ROFS image stream, but we don't

            // want to transfer ownership - ownership remains entirely with the SymbianImageROFS object.

            SIStream e32ImageStream = new SIStream( (Stream) ImageStream, SIStream.TOwnershipType.EOwnedExternally );

            try

            {

                iE32Image = new SymbianImageE32( aName, aSize, aPosition, e32ImageStream, aImage );

                if ( iE32Image.Count == 0 )

                {

                    throw new Exception( "Invalid E32Image file" );

                }

            }

            catch ( Exception e )

            {

                e32ImageStream.Close();

                throw e;

            }

        }

        #endregion

        #region From SymbianImageContentFile

        public override TSymbianCompressionType CompressionType

        {

            get { return iE32Image.CompressionType; }

        }

        public override uint ProvideDataUInt32( uint aAddress )

        {

            uint ret = E32ImageContent.ProvideDataUInt32( aAddress );

            return ret;

        }

        public override ushort ProvideDataUInt16( uint aAddress )

        {

            ushort ret = E32ImageContent.ProvideDataUInt16( aAddress );

            return ret;

        }

        public override string FileName

        {

            get { return E32ImageContent.FileName; }

        }

        public override uint FileSize

        {

            get { return E32ImageContent.FileSize; }

        }

        public override uint ContentSize

        {

            get

            {

                uint ret = E32ImageContent.ContentSize;

                return ret;

            }

        }

        public override TCheckedUid Uid

        {

            get { return E32ImageContent.Uid; }

        }

        public override byte[] GetAllData()

        {

            return E32ImageContent.GetAllData();

        }

        protected override void DoDecompress()

        {

            // We can prepare the content synchronously because we're either running

            // in a separate thread (async) or supposed to be performing the operation

            // synchronously in any case.

            SIContentE32Image content = E32ImageContent;

            content.PrepareContent( TSynchronicity.ESynchronous );

        }

        protected override void OnRelocationAddressChanged( uint aOld, uint aNew )

        {

            // Cascade the relocation change to the E32Image

            E32ImageContent.RelocationAddress = aNew;

        }

        protected override bool GetIsContentPrepared()

        {

            return E32ImageContent.IsContentPrepared;

        }

        #endregion

        #region From DisposableObject

        protected override void CleanupManagedResources()

        {

            try

            {

                base.CleanupManagedResources();

            }

            finally

            {

                iE32Image.Dispose();

            }

        }

        #endregion

        #region Properties

        internal SIContentE32Image E32ImageContent

        {

            get { return iE32Image[ 0 ] as SIContentE32Image; }

        }

        #endregion

        #region Data members

        private readonly SymbianImageE32 iE32Image;

        #endregion

    }

}