phonebookui/Phonebook2/UIControls/src/TPbk2FindTextUtil.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 25 May 2010 12:26:45 +0300
branchRCL_3
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parent 0 e686773b3f54
permissions -rw-r--r--
Revision: 201019 Kit: 2010121
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/*
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* Copyright (c) 2007-2007 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Find text box util
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*
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*/
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// INCLUDE FILES
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#include "TPbk2FindTextUtil.h"
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#include <e32std.h>
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#include <aknsfld.h>    // CAknSearchField
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#ifdef _DEBUG
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enum TPanicCode
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    {
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    EPanicLogic_FindTextBufferL
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    };
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void Panic(TPanicCode aReason)
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    {
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    _LIT(KPanicText, "TPbk2FindTextUtil");
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    User::Panic(KPanicText, aReason);
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    }
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#endif // _DEBUG
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// ============================ MEMBER FUNCTIONS ===============================
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void TPbk2FindTextUtil::EnsureFindTextBufSizeL( 
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        const CAknSearchField& aFindBox,
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        HBufC** aFindTextBuf )
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    {
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    // Initial minimum size for the find text buffer
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    const TInt KInitialBufSize = 8;
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    const TInt findBoxTextLength = aFindBox.TextLength();
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    if (findBoxTextLength > 0)
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        {
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        TInt bufCapacity = 0;
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        if ( *aFindTextBuf )
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            {
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            bufCapacity = (*aFindTextBuf)->Des().MaxLength();
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            }
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        if (bufCapacity < findBoxTextLength)
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            {
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            // Allocate a new buffer of at least KInitialBufSize
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            // characters or twice as large as the previous one
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            const TInt KDoubleSize = 2;
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            const TInt newBufSize = Max(Max(KInitialBufSize,
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                KDoubleSize*bufCapacity), findBoxTextLength);
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            HBufC* newBuf = HBufC::NewL(newBufSize);
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            delete *aFindTextBuf;
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            *aFindTextBuf = newBuf;
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            }
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        TPtr bufPtr = (*aFindTextBuf)->Des();
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        __ASSERT_DEBUG
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            (bufPtr.MaxLength()>=KInitialBufSize &&
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            bufPtr.MaxLength()>=findBoxTextLength,
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            Panic(EPanicLogic_FindTextBufferL));
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        }
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    // caller expect buffer to be found
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    if ( !(*aFindTextBuf ) )
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        {
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        *aFindTextBuf = HBufC::NewL( KInitialBufSize );
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        }
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    }
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//  End of File