/*

* Copyright (c) 2009 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:

*

*/

// INCLUDE FILES

#include <f32file.h>

#include <s32file.h>

#include <sysutil.h> 

#include "menusrvmmchistory.h"

// CONSTANTS

LOCAL_D const TInt KMenuMmcHistoryLength = 2;

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

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

// CMenuSrvMmcHistory::LoadL

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

//

void CMenuSrvMmcHistory::LoadL( RFs& aFs, const TDesC& aFname )

    {

    iMmcList.Reset();

    TUint att;

    if ( KErrNotFound != aFs.Att( aFname, att ) )

        {

        RFileReadStream stream;

        CleanupClosePushL( stream );

        User::LeaveIfError( stream.Open

            ( aFs, aFname, EFileStream | EFileShareReadersOnly) );

        TInt len = Min( KMenuMmcHistoryLength, stream.ReadInt32L() );

        while( len-- )

            {

            iMmcList.AppendL( stream.ReadUint32L() );

            }

        CleanupStack::PopAndDestroy( &stream );

        }

    }

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

// CMenuSrvMmcHistory::SaveL

// Method do not work if there is no free space on C drive. 

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

//

void CMenuSrvMmcHistory::SaveL( RFs& aFs, const TDesC& aFname )

    {

	if ( SysUtil::DiskSpaceBelowCriticalLevelL( &aFs, 0, EDriveC) )

		{

		return;

		}

    RFileWriteStream stream;

    CleanupClosePushL( stream );

    User::LeaveIfError( stream.Replace

        ( aFs, aFname, EFileStream | EFileShareExclusive ) );

    stream.WriteInt32L( iMmcList.Count() );

    for ( TInt i = 0; i < iMmcList.Count(); i++ )

        {

        stream.WriteUint32L( iMmcList[i] );

        }

    CleanupStack::PopAndDestroy( &stream );

    }

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

// CMenuSrvMmcHistory::InsertL

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

//

void CMenuSrvMmcHistory::InsertL( TUint aMmc )

    {

    TInt i = iMmcList.Find( aMmc );

    switch ( i )

        {

        case 0:

            {

            // aMmc is already first, do nothing.

            break;

            }

        case KErrNotFound:

            {

            // aMmc is not in the list. Insert as first.

            if ( iMmcList.Count() == KMenuMmcHistoryLength )

                {

                // List already full - remove last item to make space.

                iMmcList.Remove( KMenuMmcHistoryLength - 1 );

                }

            iMmcList.InsertL( aMmc, 0 );

            break;

            }

        default:

            {

            // aMmc is in the list, but not first. Move to first place.

            iMmcList.Remove( i );

            iMmcList.InsertL( aMmc, 0 );

            break;

            }

        }

    }

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

// CMenuSrvMmcHistory::Find

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

//

TInt CMenuSrvMmcHistory::Find( TUint aMmc )

    {

    return iMmcList.Find( aMmc );

    }

//  End of File