/*

* Copyright (c) 2002 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

*      Implementation of CWmlBrowserFavouritesIncrementalDelete.

*      

*

*/

// INCLUDE FILES

#include <AknWaitDialog.h>

#include <favouritesdb.h>

#include <BrowserNG.rsg>

#include "BrowserFavouritesIncrementalDelete.h"

#include "BrowserFavouritesModel.h"

// CONSTANTS

/// Granularity of the folder-contents array.

LOCAL_D const TInt KGranularity = 4;

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

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

// CBrowserFavouritesIncrementalDelete::NewL

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

//

CBrowserFavouritesIncrementalDelete*

CBrowserFavouritesIncrementalDelete::NewL

        (

        CBrowserFavouritesModel& aModel,

        CArrayFix<TInt>& aUids,

        CArrayFix<TInt>& aNotDeletedUids,

        TInt aPriority /*=CActive::EPriorityStandard*/

        )

    {

    CBrowserFavouritesIncrementalDelete* incDel =

        new (ELeave) CBrowserFavouritesIncrementalDelete

        ( aModel, aUids, aNotDeletedUids, aPriority );

    CleanupStack::PushL( incDel );

    incDel->ConstructL();

    CleanupStack::Pop();    // incDel

    return incDel;

    }

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

// CBrowserFavouritesIncrementalDelete::~CBrowserFavouritesIncrementalDelete

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

//

CBrowserFavouritesIncrementalDelete::~CBrowserFavouritesIncrementalDelete()

    {

    delete iFolderContents;

    }

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

// CBrowserFavouritesIncrementalDelete::CBrowserFavouritesIncrementalDelete

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

//

CBrowserFavouritesIncrementalDelete::CBrowserFavouritesIncrementalDelete

    (

    CBrowserFavouritesModel& aModel,

    CArrayFix<TInt>& aUids,

    CArrayFix<TInt>& aNotDeletedUids,

    TInt aPriority

    )

: CBrowserFavouritesIncrementalOp( aModel, aPriority ), iUids( &aUids ),

  iNotDeletedUids( &aNotDeletedUids ), iFolderPending( EFalse ), iIndex( 0 )

    {

    }

// CBrowserFavouritesIncrementalDelete::ConstructL

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

//

void CBrowserFavouritesIncrementalDelete::ConstructL()

    {

    CBrowserFavouritesIncrementalOp::ConstructL();

    iFolderContents = new (ELeave) CArrayFixFlat<TInt>( KGranularity );

    }

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

// CBrowserFavouritesIncrementalDelete::StepL

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

//

TInt CBrowserFavouritesIncrementalDelete::StepL()

    {

    if ( iFolderContents->Count() )

        {

        // Deleting one item from folder.

        (void)iModel->Database().Delete( iFolderContents->At( 0 ) );

        iFolderContents->Delete( 0 );

        }

    else if ( iIndex < iUids->Count() )

        {

        // Still have item in the main list to delete.

        TInt uid = iUids->At( iIndex );

        // Check if it is a non-empty folder: get contents.

        //

        // The variable iFolderPending is a performance optimization: avoid

        // querying contents of a folder twice. (If iFolderPending == ETrue,

        // and we reach this point, that means that the last item in a folder

        // was deleted in the last StepL. The contents of this folder were

        // already queried).

        if ( !iFolderPending )

            {

            // The contents of this folder were not queried yet: do it now.

            iModel->Database().GetUids( *iFolderContents, uid );

            }

        if ( iFolderContents->Count() )

            {

            // Folder is not empty, do nothing now. iIndex is not incremented

            // (deletion of this folder becomes pending) and next StepL will

            // begin deleting the contents.

            iFolderPending = ETrue;

            }

        else

            {

            // Deleting an empty (pending) folder or an ordinary item.

            iFolderPending = EFalse;

            if ( iModel->Database().Delete( uid ) != KErrNone )

                {

                // Error deleting.

                iNotDeletedUids->AppendL( uid );

                }

            iIndex++;

            }

        }

    return iUids->Count() - iIndex;

    }

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

// CBrowserFavouritesIncrementalDelete::CreateWaitNoteLC

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

//

void CBrowserFavouritesIncrementalDelete::CreateWaitNoteLC()

    {

    iWaitNote = new (ELeave) CAknWaitDialog

        ( REINTERPRET_CAST( CEikDialog**, &iWaitNote ) );

    iWaitNote->PrepareLC( R_WMLBROWSER_FAVOURITES_NOTE_DELETING );

    }

// End of File