1 /*

     2 * Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

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

     6 * which accompanies this distribution, and is available

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

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *      Interface for Phonebook database compression strategy.

    16 *

    17 */

    18 

    19 

    20 #ifndef __CPBKDEFAULTCOMPRESSIONSTRATEGY_H__

    21 #define __CPBKDEFAULTCOMPRESSIONSTRATEGY_H__

    22 

    23 // INCLUDES

    24 #include <cntdb.h>      // for MContactUiCompactObserver

    25 #include "MPbkCompressionStrategy.h"

    26 

    27 // CLASS DECLARATION

    28 

    29 /**

    30  * Default Phonebook database compression strategy.

    31  */

    32 NONSHARABLE_CLASS(CPbkDefaultCompressionStrategy) :

    33         public CBase,

    34         public MPbkCompressionStrategy,

    35         private MContactDbObserver,

    36         private MContactUiCompactObserver

    37     {

    38     public:

    39         /**

    40          * Creates a new instance of this class.

    41          *

    42          * @param aDb       contact database whose compression to manage.

    43          * @param aDbDrive  the drive aDb is on. This parameter is needed 

    44          *                  because the drive cannot be retrieved from 

    45          *                  CContactDatabase once it is opened.

    46          * @param aFs       Open file system handle. 

    47          */

    48         static CPbkDefaultCompressionStrategy* NewL

    49             (CContactDatabase& aDb, TDriveNumber aDbDrive, RFs& aFs);

    50 

    51         /**

    52          * Destructor.

    53          */

    54         ~CPbkDefaultCompressionStrategy();

    55 

    56     public: // from MPbkCompressionStrategy

    57         void SetCompressUi(MPbkCompressUi* aCompressUi);

    58         TBool CheckCompress();

    59         TBool IsCompressionEnabled();

    60         void CompressL();

    61         void CancelCompress();

    62         void Release();

    63 

    64     private:  // from MContactDbObserver

    65     	void HandleDatabaseEventL(TContactDbObserverEvent aEvent);

    66 

    67     private:  // from MContactUiCompactObserver

    68 	    void Step(TInt aStep);

    69 	    void HandleError(TInt aError);

    70 

    71     private:  // Implementation

    72         CPbkDefaultCompressionStrategy

    73             (CContactDatabase& aDb, TDriveNumber aDbDrive, RFs& aFs);

    74         void ConstructL();

    75         void DoCompressL();

    76         TBool FileSpaceLowOnDbDrive() const;

    77         class CCompressionTimer;

    78         friend class CCompressionTimer;

    79         class CDiskSpaceWatcher;

    80 

    81     private:  // Data

    82         /// Ref: contact database whose compression to manage

    83         CContactDatabase& iDb;

    84         /// Own: drive the contact database is on

    85         TDriveNumber iDbDrive;

    86         /// Own: File server connection

    87         mutable RFs iFs;

    88         /// Own: contact database change notifier

    89         CContactChangeNotifier* iDbChangeNotifier;

    90         // Own: compression timer

    91         CCompressionTimer* iCompressionTimer;

    92         /// Own: disk space watcher

    93         CDiskSpaceWatcher* iDiskSpaceWatcher;

    94         /// Own: executing database compression object

    95         CContactActiveCompress* iCompressor;

    96         /// Ref: compress UI

    97         MPbkCompressUi* iCompressUi;

    98     };

    99 

   100 

   101 #endif // __CPBKDEFAULTCOMPRESSIONSTRATEGY_H__

   102 

   103 

   104 // End of File