/*

* Copyright (c) 2003 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:  Reverse ISO-8859-8 text

*

*/

// INCLUDE FILES

#include <e32std.h>

#include <e32base.h>

#include "textreverse.h"

#include <BidiVisual.h>

#include "nwx_settings.h"

#include "nwx_statuscodeconvert.h"

#include "BrsrStatusCodes.h"

// EXTERNAL DATA STRUCTURES

// EXTERNAL FUNCTION PROTOTYPES

// CONSTANTS

// MACROS

// LOCAL CONSTANTS AND MACROS

// MODULE DATA STRUCTURES

// LOCAL FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

// ============================= LOCAL FUNCTIONS ===============================

void ReverseTextL(NW_String_t* toString, NW_String_t* fromString)

    {

    const TInt additionalCharsLen = 4;

    NW_ASSERT(toString != NULL);

    NW_ASSERT(fromString != NULL);

    // Get the storage we know it is UCS2 encoded

    TUint16* stringToReverse = (TUint16*)NW_String_getStorage(fromString);

    TUint stringLen = NW_String_getByteCount(fromString) / (sizeof (TUint16));

    if (stringToReverse[stringLen - 1] == 0) 

        {

        stringLen--;

        }

    if (stringLen > 0)

        {

        TPtrC fromStringPtr(stringToReverse, stringLen);

        TUint16* reversedString = new(ELeave) TUint16 [stringLen + additionalCharsLen];

        CleanupStack::PushL(reversedString);

        TPtr reversedStringPtr(reversedString, stringLen + additionalCharsLen);

        TBidirectionalState::TRunInfo aRunInfoArray;

        TBidirectionalState::TRunInfo *mRunInfoArray = NULL;

        TBidiLogicalToVisual *bdLtoV = new(ELeave) TBidiLogicalToVisual(fromStringPtr, &aRunInfoArray, 1);

        TInt runArrayCount = bdLtoV->Reorder();

        delete bdLtoV;

        mRunInfoArray = new(ELeave) TBidirectionalState::TRunInfo [runArrayCount];

        CleanupStack::PushL(mRunInfoArray);

        bdLtoV = new TBidiLogicalToVisual(fromStringPtr, mRunInfoArray, runArrayCount);

        CleanupStack::PushL(bdLtoV);

        bdLtoV->Reorder();

        bdLtoV->GetVisualLine(reversedStringPtr, 0, stringLen, 0xFFFF);

        reversedStringPtr.ZeroTerminate();

        if (StatusCodeConvert(NW_String_ucs2CharToString (toString, reversedString, HTTP_iso_10646_ucs_2)) != KBrsrSuccess)

            {

            User::Leave(KErrNoMemory);

            }

        CleanupStack::PopAndDestroy(3); // bdLtoV, mRunInfoArray, reversedString

        }

    else

        {

        // transfer ownership

        NW_String_shallowCopy(toString, fromString);

        NW_String_clearUserOwnsStorage(fromString);

        }

    }

TBrowserStatusCode ReverseText(NW_String_t* string)

    {

    NW_ASSERT(string != NULL);

    NW_String_t toString;

    TBrowserStatusCode status = KBrsrSuccess;

    // Try to reverse only iso-8859-8

    if (NW_Settings_GetOriginalEncoding() == HTTP_iso_8859_8)

        {

        NW_String_initialize (&toString, NULL, 0);

        TRAPD(ret, ReverseTextL(&toString, string));

        if (ret != KErrNone)

            {

            status = KBrsrOutOfMemory;

            }

        else

            {

                //transfer ownership back to the original string

                if (NW_String_getUserOwnsStorage(string))

                    {

                    NW_String_deleteStorage(string);

                    }

                NW_String_shallowCopy(string, &toString);

                NW_String_clearUserOwnsStorage(&toString);

            }

        }

    return status;

    }

// ========================== OTHER EXPORTED FUNCTIONS =========================

//  End of File