/*

* Copyright (c) 2002-2007 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: 

*     Image data abstraction hierarchy.

*

*/

#ifndef CPBK2IMAGEDATA_H

#define CPBK2IMAGEDATA_H

//  INCLUDES

#include <e32base.h>

#include <f32file.h>

//  FORWARD DECLARATIONS

class CPbk2AttachmentFile;

// CLASS DECLARATIONS

/**

 * Abstract thumbnail image data interface. Provides polymorphism between 

 * images stored in a file or buffer.

 */

class MPbk2ImageData

    {

    public:

        /**

         * Virtual destructor.

         */

        virtual ~MPbk2ImageData()

			{

			}

        /**

         * Returns the image data in a buffer.

         * @return The image data in a buffer.

         */

        virtual const TDesC8& GetBufferL() const =0;

        /**

         * Returns the image data in a file.

         * @return The image data in a file.

         */

        virtual const TDesC& GetFileNameL() const =0;

    };

/**

 * Image file implementation of MPbk2ImageData.

 */

NONSHARABLE_CLASS(CPbk2ImageFileData) :

        public CBase, 

        public MPbk2ImageData

    {

    public:  // Interface

        /**

         * Creates a new instance of this class.

         *

         * @param aFileName name of the image file to encapsulate.

         * @return a new instance of this class.

         */

        static CPbk2ImageFileData* NewL(const TDesC& aFileName);

        /**

         * Destructor.

         */

        ~CPbk2ImageFileData();

    public:  // from MPbk2ImageData

        const TDesC8& GetBufferL() const;

        const TDesC&  GetFileNameL() const;

    private:  // Implementation

        CPbk2ImageFileData(const TDesC& aFileName);

    private:  // Data

		/// Own: file name

        TFileName iFileName;

		/// Own: buffer

        mutable HBufC8* iBuffer;

    };

/**

 * Image buffer implementation of MPbk2ImageData.

 */

NONSHARABLE_CLASS(CPbk2ImageBufferData) :

        public CBase, 

        public MPbk2ImageData

    {

    public:  // Interface

        /**

         * Creates a new instance of this class.

         *

         * @param aBuffer       reference to the image buffer to encapsulate. 

         *                      The buffer must exist as long as the returned 

         *                      object exists.

         * @param aBaseName     base name to use for any image file created

         *                      from the buffer.

         * @return a new instance of this class.

         */

        static CPbk2ImageBufferData* NewL

            (const TDesC8& aBuffer, const TDesC& aBaseName=KNullDesC);

        /**

         * Destructor.

         * Deletes any file created in GetFileNameL().

         */

        ~CPbk2ImageBufferData();

    public:  // from MPbk2ImageData

        const TDesC8& GetBufferL() const;

        const TDesC&  GetFileNameL() const;

    private:  // Implementation

        CPbk2ImageBufferData(const TDesC8& aBuffer, const TDesC& aBaseName);

    private:  // Data

		/// Ref: buffer

        const TDesC8& iBuffer;

		/// Own: file name

        TFileName iBaseName;

		/// Own: file server session

        mutable RFs iFsSession;

		/// Own: attachment file

        mutable CPbk2AttachmentFile* iFile;

    };

#endif // CPBK2IMAGEDATA_H

// End of File