/*

* Copyright (c) 2007 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:  Swapper class for message sorting function

*

*/

#include "emailtrace.h"

#include "ipsplgheaders.h"

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

// Basic constructor

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

TIpsPlgMsgSwap::TIpsPlgMsgSwap( CMsvEntry& aFolderEntry )

    : iFolderEntry(aFolderEntry)

    {

    FUNC_LOG;

    // none

    }

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

// Swaps the messages inside the folder CMsvEntry instance. 

// This is somewhat extreme solution assuming that CMsvEntry returns

// references to the actual TMsvEntries (not copies) and that CMsvEntry

// does not do any sorting itself.

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

void TIpsPlgMsgSwap::Swap( TInt aLeft, TInt aRight ) const

    {

    FUNC_LOG;

    if ( aLeft == aRight )

        {

        return;

        }

    TInt childCount( iFolderEntry.Count() );

    if ( aLeft >= childCount || aRight >= childCount  )

        {

        return;

        }

    Mem::Swap( (TAny*) &( iFolderEntry[aLeft] ), 

        (TAny*) &( iFolderEntry[aRight] ), sizeof( TMsvEntry ) );

    }