/*

* Copyright (c) 2004 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:  CIRViewStack class

*

*/

#include <eikenv.h>

#include "irviewstack.h"

#include "irdebug.h"

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

// Two-phased constructor.

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

//

CIRViewStack* CIRViewStack::NewL()

    {

    IRLOG_INFO( "CIRViewStack::NewL - Entering" );

    CIRViewStack* self = new( ELeave ) CIRViewStack( );

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    IRLOG_INFO( "CIRViewStack::NewL - Exiting" );

    return self;

    }

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

// Desctructor.

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

//

CIRViewStack::~CIRViewStack()

    {

    IRLOG_INFO( "CIRViewStack::~CIRViewStack - Entering" );

    iViewStack.Close();

    IRLOG_INFO( "CIRViewStack::~CIRViewStack - Exiting" );

    }

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

// C++ defaul desctructor.

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

//

CIRViewStack::CIRViewStack( )

    {

    IRLOG_INFO( "CIRViewStack::CIRViewStack" );

    }

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

// Second phase constructor.

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

//

void CIRViewStack::ConstructL()

    {

    IRLOG_INFO( "CIRViewStack::ConstructL" );

    }

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

// CIRViewStack::Peek()

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

//

TUid CIRViewStack::Peek() const

    {

    IRLOG_INFO( "CIRViewStack::ConstructL" );

    return iViewStack.Count() ? iViewStack[iViewStack.Count() - 1] : KNullUid;

    }

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

// CIRViewStack::PushL()

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

//

void CIRViewStack::PushL( TUid aView )

    {

    IRLOG_INFO( "CIRViewStack::PushL - Entering" );

    if( !iViewStack.Count() || iViewStack[iViewStack.Count()-1] != aView )

        {

        iViewStack.AppendL( aView );

        }

    IRLOG_INFO( "CIRViewStack::PushL - Exiting" );

    }

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

// CIRViewStack::Pop()

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

//

TInt CIRViewStack::Count() const

    {

    IRLOG_INFO( "CIRViewStack::Count" );

    return iViewStack.Count();

    }

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

// CIRViewStack::Pop()

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

//

TUid CIRViewStack::Pop()

    {

    IRLOG_INFO( "CIRViewStack::Pop - Entering" );

    TUid ret = KNullUid;

    if( iViewStack.Count() )

        {

        ret = iViewStack[iViewStack.Count()-1];

        iViewStack.Remove( iViewStack.Count()-1 );

        }

    IRLOG_INFO( "CIRViewStack::Pop - Exiting" );

    return ret;

    }

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

// CIRViewStack::PopTo()

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

//

TUid CIRViewStack::PopTo( TUid aId )

    {

    IRLOG_INFO( "CIRViewStack::PopTo - Entering" );

    TUid ret = KNullUid;

    while ( Peek() != aId && Count() > 0 )

        {

        ret = Pop();

        }

    IRLOG_INFO( "CIRViewStack::PopTo - Exiting" );

    return ret;

    }