/*

* Copyright (c) 2007-2007 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:  Find text box util

*

*/

// INCLUDE FILES

#include "TPbk2FindTextUtil.h"

#include <e32std.h>

#include <aknsfld.h>    // CAknSearchField

#ifdef _DEBUG

enum TPanicCode

    {

    EPanicLogic_FindTextBufferL

    };

void Panic(TPanicCode aReason)

    {

    _LIT(KPanicText, "TPbk2FindTextUtil");

    User::Panic(KPanicText, aReason);

    }

#endif // _DEBUG

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

void TPbk2FindTextUtil::EnsureFindTextBufSizeL( 

        const CAknSearchField& aFindBox,

        HBufC** aFindTextBuf )

    {

    // Initial minimum size for the find text buffer

    const TInt KInitialBufSize = 8;

    const TInt findBoxTextLength = aFindBox.TextLength();

    if (findBoxTextLength > 0)

        {

        TInt bufCapacity = 0;

        if ( *aFindTextBuf )

            {

            bufCapacity = (*aFindTextBuf)->Des().MaxLength();

            }

        if (bufCapacity < findBoxTextLength)

            {

            // Allocate a new buffer of at least KInitialBufSize

            // characters or twice as large as the previous one

            const TInt KDoubleSize = 2;

            const TInt newBufSize = Max(Max(KInitialBufSize,

                KDoubleSize*bufCapacity), findBoxTextLength);

            HBufC* newBuf = HBufC::NewL(newBufSize);

            delete *aFindTextBuf;

            *aFindTextBuf = newBuf;

            }

        TPtr bufPtr = (*aFindTextBuf)->Des();

        __ASSERT_DEBUG

            (bufPtr.MaxLength()>=KInitialBufSize &&

            bufPtr.MaxLength()>=findBoxTextLength,

            Panic(EPanicLogic_FindTextBufferL));

        }

    // caller expect buffer to be found

    if ( !(*aFindTextBuf ) )

        {

        *aFindTextBuf = HBufC::NewL( KInitialBufSize );

        }

    }

//  End of File