/*

* Copyright (c) 2009 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:

* Implementation of SsmLanguageLoader class.

*

*/

#include <e32std.h>

#include <hal.h>

#include "ssmlanguageloader.h"

#include "trace.h"

_LIT( KLocaleDllNameBase, "ELOCL" );

_LIT( KLocaleDllExtensionFormat, ".%u" );

_LIT( KLocaleDllExtensionPadding, "0" );

_LIT( KDefaultLocaleDllNameExtension, ".LOC" );

const TInt KMaxLocaleDllNameLength = 16;

const TInt KMaxLocaleDllExtensionLength = 6;

const TInt KMinLocaleDllExtensionLength = 3;

const TInt KLocaleDllExtensionPaddingPosition = 1;

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

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

// SsmLanguageLoader::LoadLanguage

//

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

//

TInt SsmLanguageLoader::LoadLanguage( const TInt aLanguage )

    {

    FUNC_LOG;

    INFO_1( "Loading language %d", aLanguage );

    TInt errorCode = StoreLanguageToHal( aLanguage );

    ERROR( errorCode, "Failed to store language code to HAL" );

    errorCode = LoadLocaleDll( aLanguage );

    ERROR( errorCode, "Failed to load locale DLL" );

    return errorCode;

    }

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

// SsmLanguageLoader::StoreLanguageToHal

//

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

//

TInt SsmLanguageLoader::StoreLanguageToHal( const TInt aLanguage )

    {

    FUNC_LOG;

    TInt errorCode = HAL::Set( HAL::ELanguageIndex, aLanguage );

    return errorCode;

    }

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

// SsmLanguageLoader::LoadLocaleDll

//

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

//

TInt SsmLanguageLoader::LoadLocaleDll( const TInt aLanguage )

    {

    FUNC_LOG;

    // Dot plus five digit locale

    TBuf<KMaxLocaleDllExtensionLength> extension; 

    extension.Format( KLocaleDllExtensionFormat, aLanguage );

    // Padd ".1" to ".01" for compatibility.

    if ( extension.Length() < KMinLocaleDllExtensionLength ) 

        {

        extension.Insert( KLocaleDllExtensionPaddingPosition,

                          KLocaleDllExtensionPadding );

        }

    TBuf<KMaxLocaleDllNameLength> localeDllName;

    localeDllName = KLocaleDllNameBase;

    localeDllName.Append( extension );

    INFO_1( "Loading DLL named '%S'", &localeDllName );

    TInt errorCode = ChangeLocale( localeDllName );

    if ( errorCode == KErrNotFound ) // Try default locale

        {

        INFO( "SsmLanguageLoader: Loading default locale" );

        localeDllName = KLocaleDllNameBase;

        localeDllName.Append( KDefaultLocaleDllNameExtension );

        errorCode = ChangeLocale( localeDllName );

        }

    if ( errorCode == KErrNone )

        {

        TLocale().Set();

        }

    return errorCode;

    }

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

// SsmLanguageLoader::ChangeLocale

//

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

//

TInt SsmLanguageLoader::ChangeLocale( const TDesC& aLocaleDllName )

    {

    FUNC_LOG;

    TExtendedLocale extLocale;

    TInt errorCode = extLocale.LoadLocale( aLocaleDllName );

    ERROR( errorCode, "Failed to load locale" );

    if ( errorCode == KErrNone )

        {

        errorCode = extLocale.SaveSystemSettings();

        ERROR( errorCode, "Failed to set locale" );

        }

    return errorCode;

    }