/*

* Copyright (c) 2002 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: 

*     CAlwaysOnlineDiskSpaceObserver implementation file

*

*

*/

// INCLUDE FILES

#include <e32base.h>

#include <systemwarninglevels.hrh>

#include "AlwaysOnlineManagerDiskSpaceObserver.h"

#include "AlwaysOnlineManager.h"

#include "AlwaysOnlineManagerLogging.h"

// ================= MEMBER FUNCTIONS =======================

// ----------------------------------------------------------------------------

// CAlwaysOnlineDiskSpaceObserver::CAlwaysOnlineDiskSpaceObserver

//

// C++ constructor can NOT contain any code, that

// might leave.

// ----------------------------------------------------------------------------

//

CAlwaysOnlineDiskSpaceObserver::CAlwaysOnlineDiskSpaceObserver( 

    CAlwaysOnlineManager* aManager, 

    CMsvSession& aSession )

    : 

    CActive( CActive::EPriorityStandard ),

    iManager( *aManager ),

    iSession( aSession ),    

    iNewLimit( 0 ),

    iCurrentLimit( 0 )

    {

    CActiveScheduler::Add( this );

    }

// ----------------------------------------------------------------------------

// CAlwaysOnlineDiskSpaceObserver::NewL

//

// Two-phased constructor.

// ----------------------------------------------------------------------------

//

CAlwaysOnlineDiskSpaceObserver* CAlwaysOnlineDiskSpaceObserver::NewL( 

    CAlwaysOnlineManager* aManager, 

    CMsvSession& aSession )

    {

    CAlwaysOnlineDiskSpaceObserver* self = new ( ELeave )

        CAlwaysOnlineDiskSpaceObserver( aManager, aSession );

    return self;

    }

// ----------------------------------------------------------------------------

// CAlwaysOnlineDiskSpaceObserver::~CAlwaysOnlineDiskSpaceObserver

//

// Destructor

// ----------------------------------------------------------------------------

//

CAlwaysOnlineDiskSpaceObserver::~CAlwaysOnlineDiskSpaceObserver()

    {

    Cancel();

    }

// ----------------------------------------------------------------------------

// CAlwaysOnlineDiskSpaceObserver::DoCancel

//

// From active object framework

// ----------------------------------------------------------------------------

//

void CAlwaysOnlineDiskSpaceObserver::DoCancel()

    {

    if ( IsActive() )

        {

        iSession.FileSession().NotifyDiskSpaceCancel( iStatus );

        }

    }

// ----------------------------------------------------------------------------

// CAlwaysOnlineDiskSpaceObserver::RunL

//

// From active object framework

// ----------------------------------------------------------------------------

//

void CAlwaysOnlineDiskSpaceObserver::RunL()

    {

    if ( iStatus.Int() == KErrNone )

        {

        // timer or file server event?

        SetLimitAndActivateL();

        }

    }

// ----------------------------------------------------------------------------

// CAlwaysOnlineDiskSpaceObserver::RunError()

// ----------------------------------------------------------------------------

//

TInt CAlwaysOnlineDiskSpaceObserver::RunError( TInt /* aError */ )

    {

    // Just ignore any error and continue without

    // any handling to allow smooth execution. 

    return KErrNone;            

    }

// ----------------------------------------------------------------------------

// CAlwaysOnlineDiskSpaceObserver::SetLimitAndActivateL

// ----------------------------------------------------------------------------

//

void CAlwaysOnlineDiskSpaceObserver::SetLimitAndActivateL()

    {

    KAOMANAGER_LOGGER_WRITE("CAlwaysOnlineDiskSpaceObserver::SetLimitAndActivateL() Received DISKSPACE event");

    Cancel();

    // Handle the possible change

    HandleLimitChange();

    // Get current drive

    TInt currentDrive = iSession.CurrentDriveL();

    // Make the disk space check. The safety margin is used to keep disk space

    // from dropping below critical level

    if ( !MsvUiServiceUtilities::DiskSpaceBelowCriticalLevelWithOverheadL( 

            iSession, 0, KAOSafetyMargin ) )

        {           

        KAOMANAGER_LOGGER_WRITE("CAlwaysOnlineDiskSpaceObserver::SetLimitAndActivateL() Event: Above Critical");

        iManager.HandleDiskSpaceEventL( EAOManagerDiskSpaceAboveCritical );

        }

    else

        {

        KAOMANAGER_LOGGER_WRITE("CAlwaysOnlineDiskSpaceObserver::SetLimitAndActivateL() Event: Below Critical");

        iManager.HandleDiskSpaceEventL( EAOManagerDiskSpaceBelowCritical );

        }        

    // Issue new request

    iSession.FileSession().NotifyDiskSpace( iCurrentLimit, currentDrive, iStatus );

    SetActive();    

    }

// ----------------------------------------------------------------------------

// CImumDiskSpaceObserverOperation::HandleLimitChange()

// ----------------------------------------------------------------------------

//

void CAlwaysOnlineDiskSpaceObserver::HandleLimitChange()    

    {

    if( !iNewLimit )

        {

        iCurrentLimit =  KDRIVECCRITICALTHRESHOLD + KAOSafetyMargin;

        }

    else

        {

        iCurrentLimit = iNewLimit;

        }

    } 

//  End of File