/*

* Copyright (c) 2006-2007 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:  Class for encapsulating the data source for objects.

 *

*/

#ifndef THUMBNAILOBJECTSOURCE_H

#define THUMBNAILOBJECTSOURCE_H

#include <e32base.h>

#include <f32file.h>

typedef TUint32 TThumbnailId;

class CFbsBitmap;

/**

 *  Object source for thumbnails.

 *

 *  Class for encapsulating the data source for objects.

 *

 *  @since S60 v5.0

 */

NONSHARABLE_CLASS( CThumbnailObjectSource ): public CBase

    {

public:

    /**

     * Construct a new CThumbnailObjectSource referring to an URI.

     * @param aUri      Object URI or a full path to a file in the file system.

     * @param aMimeType MIME type. Optional, but should be specified if known.

     * @since S60 v5.0

     * @return New CThumbnailObjectSource instance.

     */

    IMPORT_C static CThumbnailObjectSource* NewL( const TDesC& aUri, const

        TDesC& aMimeType = KNullDesC );

    /**

     * Construct a new CThumbnailObjectSource referring to an URI.

     * @param aUri      Object URI or a full path to a file in the file system.

     * @param aMimeType MIME type. Optional, but should be specified if known.

     * @since S60 v5.0

     * @return New CThumbnailObjectSource instance.

     */

    IMPORT_C static CThumbnailObjectSource* NewLC( const TDesC& aUri, const

        TDesC& aMimeType = KNullDesC );

    /**

     * Construct a new CThumbnailObjectSource referring to a file handle.

     * The file handle must refer to an open file and it must remain

     * valid until this object source is deleted.

     *

     * @param aFile     File handle.

     * @param aMimeType MIME type. Optional, but should be specified if known.

     * @since S60 v5.0

     * @return New CThumbnailObjectSource instance.

     */

    IMPORT_C static CThumbnailObjectSource* NewL( const RFile64& aFile, const

        TDesC& aMimeType = KNullDesC );

    /**

     * Construct a new CThumbnailObjectSource referring to a file handle.

     * The file handle must refer to an open file and it must remain

     * valid until this object source is deleted.

     *

     * @param aFile     File handle.

     * @param aMimeType MIME type. Optional, but should be specified if known.

     * @since S60 v5.0

     * @return New CThumbnailObjectSource instance.

     */

    IMPORT_C static CThumbnailObjectSource* NewLC( const RFile64& aFile, const

        TDesC& aMimeType = KNullDesC );

    /**

     * Destructor

     *

     * @since S60 v5.0

     */

    virtual ~CThumbnailObjectSource();

public:

    /**

     * Returns file handle.

     *

     * @since S60 v5.0

     * @return reference to file handle

     */

    IMPORT_C RFile64& FileHandle();

    /**

     * Returns source uri.

     *

     * @since S60 v5.0

     * @return uri

     */

    IMPORT_C const TDesC& Uri();

private:

    /**

     * C++ default constructor

     *

     * @since S60 v5.0

     */

    CThumbnailObjectSource();

    /**

     * Symbian 2nd phase constructor can leave.

     *

     * @since S60 v5.0

     * @param aUri Object URI or a full path to a file in the file system.

     * @param aMimeType MIME type. Optional, but should be specified if known.

     */

    void ConstructL( const TDesC& aUri, const TDesC& aMimeType );

    /**

     * Symbian 2nd phase constructor can leave.

     *

     * @since S60 v5.0

     * @param aFile File handle.

     * @param aMimeType MIME type. Optional, but should be specified if known.

     */

    void ConstructL( const RFile64& aFile, const TDesC& aMimeType );

private:

    // data

    /**

     * File

     */

    RFile64 iFile;

    /**

     * Uri

     */

    HBufC* iUri; // own

    /**

     * Mime type

     */

    HBufC8* iMimeType; // own

    /**

     * Buffer

     */

    TDesC8* iBuffer; // own

    /**

     * Bitmap

     */

    CFbsBitmap* iBitmap; // own

    /**

     * ThumbnailId

public:

    /**

     * Construct a new CThumbnailObjectSource referring to a buffer 

     * containing an image.

     *

     * @param aBuffer   Buffer.

     * @param aUri      Object URI or a full path to a file in the file system.

     * @since S60 v5.0

     * @return New CThumbnailObjectSource instance.

     */    

    IMPORT_C static CThumbnailObjectSource* NewL( CFbsBitmap*  aBitmap, const TDesC& aUri );

    /**

     * Construct a new CThumbnailObjectSource referring to a buffer 

     * containing an image.

     *

     * @param aFile     File handle.

     * @param aUri      Object URI or a full path to a file in the file system.

     * @since S60 v5.0

     * @return New CThumbnailObjectSource instance.

     */        

    IMPORT_C static CThumbnailObjectSource* NewLC( CFbsBitmap*  aBitmap, const TDesC& aUri );

    /**

     * Construct a new CThumbnailObjectSource referring to a buffer 

     * containing an image.

     *

     * @param aBuffer   Buffer.

     * @param aUri      Object URI or a full path to a file in the file system.

     * @since S60 v5.0

     * @return New CThumbnailObjectSource instance.

     */       

    /**

     * Construct a new CThumbnailObjectSource referring to a buffer 

     * containing an image.

     *

     * @param aBuffer   Buffer.

     * @param aMimeType MIME type. Optional, but should be specified if known.

     * @param aUri      Object URI or a full path to a file in the file system.

     * @since S60 v5.0

     * @return New CThumbnailObjectSource instance.

     */       

    /**

     * Construct a new CThumbnailObjectSource referring to an URI.

     * @param aUri      Object URI or a full path to a file in the file system.

     * @param aMimeType MIME type. Optional, but should be specified if known.

     * @since S60 v5.0

     * @return New CThumbnailObjectSource instance.

     */

    IMPORT_C static CThumbnailObjectSource* NewL( const TDesC& aUri, 

    /**

     * Construct a new CThumbnailObjectSource referring to an URI.

     * @param aUri      Object URI or a full path to a file in the file system.

     * @param aMimeType MIME type. Optional, but should be specified if known.

     * @since S60 v5.0

     * @return New CThumbnailObjectSource instance.

     */

    IMPORT_C static CThumbnailObjectSource* NewLC( const TDesC& aUri,

    /**

     * Returns source buffer.

     *

     * @since S60 v5.0

     * @return buffer

     */  

    IMPORT_C TDesC8* Buffer();

    /**

     * Gets ownership of buffer from source object.

     * After that Buffer() returns NULL.

     *

     * @since S60 v5.0

     * @return buffer

     */

    IMPORT_C TDesC8* GetBufferOwnership();

    /**

     * Gets MIME type.

     *

     * @since S60 v5.0

     * @return MIME type

     */   

    IMPORT_C const TDesC8& MimeType();

    /**

     * Gets ThumbnailId.

     *

     * @since S60 v5.0

     * @return ThumbnailId 

    /**

     * Returns source bitmap.

     *

     * @since S60 v5.0

     * @return bitmap

     */  

    IMPORT_C CFbsBitmap* Bitmap();

    /**

     * Gets ownership of bitmap from source object.

     * After that Bitmap() returns NULL.

     *

     * @since S60 v5.0

     * @return bitmap

     */

    IMPORT_C CFbsBitmap* GetBitmapOwnership();

};

#endif // THUMBNAILOBJECTSOURCE_H