/*

* Copyright (c) 2007-2008 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:  FreestyleEmailUi exit guardian implementation.

*

*/

#include "FreestyleEmailUiAppui.h"

#include "ceuiexitguardian.h"

#include "emailtrace.h"

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

// CEUiExitGuardian::NewL

//

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

//

CEUiExitGuardian* CEUiExitGuardian::NewL( CFreestyleEmailUiAppUi& aAppUi )

    {

    FUNC_LOG;

    CEUiExitGuardian* self = new (ELeave) CEUiExitGuardian( aAppUi );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// CEUiExitGuardian::CEUiExitGuardian

//

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

//

CEUiExitGuardian::CEUiExitGuardian( CFreestyleEmailUiAppUi& aAppUi )

    : iAppUi( aAppUi )

    {

    FUNC_LOG;

    }

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

// CEUiExitGuardian::~CEUiExitGuardian

//

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

//

CEUiExitGuardian::~CEUiExitGuardian()

    {

    FUNC_LOG;

    if ( iPeriodicTimer )

        {

        iPeriodicTimer->Cancel();

        delete iPeriodicTimer;

        }

    }

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

// CEUiExitGuardian::ConstructL

//

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

//

void CEUiExitGuardian::ConstructL()

    {

    FUNC_LOG;

    iPeriodicTimer = CPeriodic::NewL( CActive::EPriorityStandard );

    iPeriodicTimerStarted = EFalse;

    }

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

// CEUiExitGuardian::PeriodicCallBack

//

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

//

TInt CEUiExitGuardian::PeriodicCallBack( TAny* aPtr )

    {

    FUNC_LOG;

    reinterpret_cast<CEUiExitGuardian*>(aPtr)->TryExitApplication();

    return KErrNone;

    }

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

// CEUiExitGuardian::TryExitApplication

//

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

//

TInt CEUiExitGuardian::TryExitApplication()

    {

    FUNC_LOG;

    const TInt KDelay = 200*1000; // 200 ms

    TInt ret = KRequestPending;

    CActiveScheduler* scheduler = CActiveScheduler::Current();

    TInt nestedLevelCount = scheduler->StackDepth();

    if ( nestedLevelCount == 1 )

        {

        iPeriodicTimer->Cancel();

        iAppUi.ExitNow();

        ret = KErrNone;

        }

    else if ( !iPeriodicTimerStarted )

        {

        iPeriodicTimer->Start( KDelay, KDelay, TCallBack(PeriodicCallBack, this) );

        iPeriodicTimerStarted = ETrue;

        }

    return ret;

    }

// end of file