/*

* Copyright (c) 2010 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:  

*     CMsgErrorDiskSpaceObserver implementation file

*

*/

// INCLUDE FILES

#include    <e32base.h>

#include    "msgerrorwatcher_p.h"

#include    "msgerrordiskspaceobserver.h"

#include    "debugtraces.h"

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

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

// CMsgErrorDiskSpaceObserver::CMsgErrorDiskSpaceObserver

//

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

// might leave.

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

//

CMsgErrorDiskSpaceObserver::CMsgErrorDiskSpaceObserver( 

    CMsgErrorWatcherPrivate& aWatcher, 

        CMsvSession& aSession, 

        RFs& aFs )

    : CActive( CActive::EPriorityStandard ),

    iWatcher( aWatcher ),

    iSession( aSession ),

    iFs( aFs ),

    iLimit( 0 )

    {

    QDEBUG_WRITE("CMsgErrorDiskSpaceObserver:CMsgErrorDiskSpaceObserver : Enter");

    CActiveScheduler::Add( this );

    QDEBUG_WRITE("CMsgErrorDiskSpaceObserver:CMsgErrorDiskSpaceObserver : Exit");

    }

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

// CMsgErrorDiskSpaceObserver::NewL

//

// Two-phased constructor.

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

//

CMsgErrorDiskSpaceObserver* CMsgErrorDiskSpaceObserver::NewL( 

    CMsgErrorWatcherPrivate& aWatcher, 

        CMsvSession& aSession, 

        RFs& aFs )

    {

    QDEBUG_WRITE("CMsgErrorDiskSpaceObserver:NewL : Enter");

    CMsgErrorDiskSpaceObserver* self = new ( ELeave )

        CMsgErrorDiskSpaceObserver( aWatcher, aSession, aFs );

    QDEBUG_WRITE("CMsgErrorDiskSpaceObserver:NewL : Exit");

    return self;

    }

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

// CMsgErrorDiskSpaceObserver::~CMsgErrorDiskSpaceObserver

//

// Destructor

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

//

CMsgErrorDiskSpaceObserver::~CMsgErrorDiskSpaceObserver()

    {

    QDEBUG_WRITE("CMsgErrorDiskSpaceObserver:~CMsgErrorDiskSpaceObserver : Enter");

    Cancel();

    QDEBUG_WRITE("CMsgErrorDiskSpaceObserver:~CMsgErrorDiskSpaceObserver : Exit");

    }

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

// CMsgErrorDiskSpaceObserver::DoCancel

//

// From active object framework

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

//

void CMsgErrorDiskSpaceObserver::DoCancel()

    {

    QDEBUG_WRITE("CMsgErrorDiskSpaceObserver:DoCancel : Enter");

    iFs.NotifyDiskSpaceCancel( iStatus );

    QDEBUG_WRITE("CMsgErrorDiskSpaceObserver:DoCancel : Exit");

    }

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

// CMsgErrorDiskSpaceObserver::RunL

//

// From active object framework

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

//

void CMsgErrorDiskSpaceObserver::RunL()

    {

    QDEBUG_WRITE("CMsgErrorDiskSpaceObserver:RunL : Enter");

    QDEBUG_WRITE_FORMAT("DiskSpace: RunL, iStatus: ", iStatus.Int() );

    TInt status = iStatus.Int();

    if ( status < 0 )

        {

        //Reset the observer.

        TRAP_IGNORE ( SetLimitAndActivateL( iLimit ) );

        return;

        }

    //We shouldn't have to check whether we're above the limit,

    //because we were below when we activated and the event comes

    //when we cross the limit

    TRAP_IGNORE( iWatcher.HandleDiskSpaceEventL() );

    QDEBUG_WRITE("CMsgErrorDiskSpaceObserver:RunL : Exit");

    }

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

// CMsgErrorDiskSpaceObserver::SetLimitAndActivateL

//

// Sets the disk space trigger level for active object

// and activates it.

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

//

void CMsgErrorDiskSpaceObserver::SetLimitAndActivateL( TInt32 aLimit )

    {

    QDEBUG_WRITE("CMsgErrorDiskSpaceObserver:SetLimitAndActivateL : Enter");

    QDEBUG_WRITE_FORMAT("DiskSpace: aLimit ", aLimit );

    __ASSERT_DEBUG( aLimit >= 0, User::Leave( KErrArgument ) );

    if ( aLimit < 0 )

        {

        return;

        }

    if ( iLimit == 0 || iLimit > aLimit )

        {

        Cancel();

        iLimit = aLimit;

        TInt currentDrive = TInt( iSession.CurrentDriveL() );

        TVolumeInfo volInfo;

        User::LeaveIfError( iFs.Volume( volInfo, currentDrive ) );

        QDEBUG_WRITE_FORMAT("DiskSpace: free/hi : ", I64HIGH( volInfo.iFree ) );

        QDEBUG_WRITE_FORMAT("DiskSpace: free/lo : ", I64LOW( volInfo.iFree ) );

        //check if we're already above the limit

        if ( I64HIGH( volInfo.iFree ) != 0 ||

            I64LOW( volInfo.iFree ) > (TUint)iLimit ) //iLimit is always positive.

            {

            iWatcher.HandleDiskSpaceEventL();

            return;

            }

        else

            {

            QDEBUG_WRITE( "notify activated" );

            TInt64 treshold = iLimit;

            iFs.NotifyDiskSpace( treshold, currentDrive, iStatus );

            // No need to check IsActive since object is cancelled 

            // anyway above

            SetActive();

            }

        }

    QDEBUG_WRITE("CMsgErrorDiskSpaceObserver:SetLimitAndActivateL : Exit");

    }

// ================= OTHER EXPORTED FUNCTIONS ==============

//  End of File