1 /*

     2 * Copyright (c) 2007-2007 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Find text box util

    15 *

    16 */

    17 

    18 

    19 

    20 // INCLUDE FILES

    21 #include "TPbk2FindTextUtil.h"

    22 #include <e32std.h>

    23 #include <aknsfld.h>    // CAknSearchField

    24 

    25 #ifdef _DEBUG

    26 enum TPanicCode

    27     {

    28     EPanicLogic_FindTextBufferL

    29     };

    30 

    31 void Panic(TPanicCode aReason)

    32     {

    33     _LIT(KPanicText, "TPbk2FindTextUtil");

    34     User::Panic(KPanicText, aReason);

    35     }

    36 #endif // _DEBUG

    37 

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

    39 

    40 void TPbk2FindTextUtil::EnsureFindTextBufSizeL( 

    41         const CAknSearchField& aFindBox,

    42         HBufC** aFindTextBuf )

    43     {

    44     // Initial minimum size for the find text buffer

    45     const TInt KInitialBufSize = 8;

    46 

    47     const TInt findBoxTextLength = aFindBox.TextLength();

    48     if (findBoxTextLength > 0)

    49         {

    50         TInt bufCapacity = 0;

    51         if ( *aFindTextBuf )

    52             {

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

    54             }

    55         if (bufCapacity < findBoxTextLength)

    56             {

    57             // Allocate a new buffer of at least KInitialBufSize

    58             // characters or twice as large as the previous one

    59             const TInt KDoubleSize = 2;

    60             const TInt newBufSize = Max(Max(KInitialBufSize,

    61                 KDoubleSize*bufCapacity), findBoxTextLength);

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

    63             delete *aFindTextBuf;

    64             *aFindTextBuf = newBuf;

    65             }

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

    67         __ASSERT_DEBUG

    68             (bufPtr.MaxLength()>=KInitialBufSize &&

    69             bufPtr.MaxLength()>=findBoxTextLength,

    70             Panic(EPanicLogic_FindTextBufferL));

    71         }

    72         

    73     // caller expect buffer to be found

    74     if ( !(*aFindTextBuf ) )

    75         {

    76         *aFindTextBuf = HBufC::NewL( KInitialBufSize );

    77         }

    78     

    79     }

    80 

    81 

    82 //  End of File