/*

* Copyright (c) 2009-2010 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:

* Implementation of CSsmLangSelCmd class.

*

*/

#include "ssmlangselcmd.h"

#include "ssmmapperutility.h"

#include "ssmalternativelanguages.h"

#include "ssmlanguageloader.h"

#include "syslangutilprivatecrkeys.h"

#include "trace.h"

#include "ssmmapperutilityinternalpskeys.h"

#include <syslangutil.h>

#include <CommonEngineDomainCRKeys.h>

#include <centralrepository.h>

/** Default granularity for list of installed languages. */

const TInt KLanguageListGranularity( 4 );

/** Any of the code set to zero means auto selection is enabled. */

const TInt KSettingAutomatic = 0;

/** The maximum number of regions to be appended to the hash set. */

const TInt KMaxNumberOfRegions = 56;

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

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

// HashLangRegionMappingFunction

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

//

inline TUint32 HashLangRegionMappingFunction(const TLanguageRegion& aMapping)

    {

    return aMapping.iLanguage;

    }

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

// LangRegionMappingIdentityRelation

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

//

inline TBool LangRegionMappingIdentityRelation(const TLanguageRegion& aMapping1,

    const TLanguageRegion& aMapping2)

    {

    return (aMapping1.iLanguage == aMapping2.iLanguage);

    }

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

// RegionLangMappingIdentityRelation

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

//

inline TBool RegionLangMappingIdentityRelation(const TLanguageRegion& aMapping1,

    const TLanguageRegion& aMapping2)

    {

    return (aMapping1.iRegion == aMapping2.iRegion);

    }

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

// CompareLanguageMapping

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

//

static TInt CompareLanguageMapping(TLanguageRegion const &aLanguage1, TLanguageRegion const &aLanguage2)

    {

    if( aLanguage1.iLanguage == aLanguage2.iLanguage )

        {

        return 0;

        }

    return ( aLanguage1.iLanguage < aLanguage2.iLanguage ) ? -1 : 1;

    }

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

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

// CSsmLangSelCmd::NewL

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

//

CSsmLangSelCmd* CSsmLangSelCmd::NewL()

	{

    FUNC_LOG;

    CSsmLangSelCmd* self = new ( ELeave ) CSsmLangSelCmd();

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

	return self;	

	}

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

// CSsmLangSelCmd::CSsmLangSelCmd

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

//

CSsmLangSelCmd::CSsmLangSelCmd() : CActive( EPriorityNormal ),

    iState( EQueryListNone ),

    iLangRegionMappingHashSet( &::HashLangRegionMappingFunction, &::LangRegionMappingIdentityRelation )

    {

    FUNC_LOG;

    CActiveScheduler::Add( this );

    }

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

// CSsmLangSelCmd::~CSsmLangSelCmd

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

//

CSsmLangSelCmd::~CSsmLangSelCmd()

    {

    FUNC_LOG;

    Cancel();

    delete iLangList;

    delete iMapperUtility;

    }

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

// CSsmLangSelCmd::ConstructL

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

//

void CSsmLangSelCmd::ConstructL()

    {

    FUNC_LOG;

    iMapperUtility = CSsmMapperUtility::NewL();

    }

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

// CSsmLangSelCmd::Initialize

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

//

 TInt CSsmLangSelCmd::Initialize( CSsmCustomCommandEnv* aCmdEnv )

     {

     FUNC_LOG;

     iEnv = aCmdEnv;

     TRAPD( errorCode, InitializeL() );

     return errorCode;

     }

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

// CSsmLangSelCmd::InitializeL

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

//

void CSsmLangSelCmd::InitializeL()

    {

    FUNC_LOG;

    ASSERT_TRACE( iEnv );

    iValidLanguages = new ( ELeave ) CArrayFixFlat<TInt>( KLanguageListGranularity );

    RFs* fsSession = &( const_cast<RFs&>( iEnv->Rfs() ) );

    //Get the list of installed languages

    TInt errorCode = SysLangUtil::GetInstalledLanguages( iValidLanguages,

                                                         fsSession );

    ERROR( errorCode, "Failed to get installed languages" );

    User::LeaveIfError( errorCode );

    //Initialize the Language and Region mapping hash set

    InitializeRegionMappingL();

    //Get the number of installed languages

    const TInt validLangCount = iValidLanguages->Count();

    TLinearOrder<TLanguageRegion> order(&CompareLanguageMapping);

    //Get the mapped regions for the installed languages

    for(TInt index = 0; index < validLangCount; ++index) 

        {

        TLanguageRegion region = iLangRegionMappingHashSet.FindL(TLanguageRegion(iValidLanguages->At(index)));

        INFO_2( "Found Region code = %d for language %d", region.iRegion, region.iLanguage );

        iRegionsArray.InsertInOrderL(region, order);

        }

    //Connect to Misc adaptation

    errorCode = iAdaptation.Connect();

    ERROR( errorCode, "Failed to connect to RSsmMiscAdaptation" );

    User::LeaveIfError( errorCode );

    }

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

// CSsmLangSelCmd::InitializeRegionMappingL

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

//

void CSsmLangSelCmd::InitializeRegionMappingL()

    {

    //Reserve the memory for the number of mappings to be appended

    iLangRegionMappingHashSet.ReserveL( KMaxNumberOfRegions );

    //Insert the Language - Region mapping

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangEnglish,             ERegGBR ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangFrench,              ERegFRA ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangGerman,              ERegDEU ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangSpanish,             ERegESP ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangItalian,             ERegITA ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangSwedish,             ERegSWE ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangDanish,              ERegDNK ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangNorwegian,           ERegNOR ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangFinnish,             ERegFIN ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangAmerican,            ERegUSA ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangPortuguese,          ERegPRT ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangTurkish,             ERegTUR ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangIcelandic,           ERegISL ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangRussian,             ERegRUS ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangHungarian,           ERegHUN ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangDutch,               ERegNLD ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangBelgianFlemish,      ERegBEL ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangCzech,               ERegCZE ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangSlovak,              ERegSVK ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangPolish,              ERegPOL ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangSlovenian,           ERegSVN ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangTaiwanChinese,       ERegTWN ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangHongKongChinese,     ERegHKG ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangPrcChinese,          ERegCHN ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangJapanese,            ERegJPN ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangThai,                ERegTHA ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangArabic,              ERegARE ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangTagalog,             ERegPHL ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangBulgarian,           ERegBGR ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangCatalan,             ERegESP ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangCroatian,            ERegHRV ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangEstonian,            ERegEST ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangFarsi,               ERegIRN ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangCanadianFrench,      ERegCAN ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangGreek,               ERegGRC ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangHebrew,              ERegISR ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangHindi,               ERegIND ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangIndonesian,          ERegIDN ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangLatvian,             ERegLVA ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangLithuanian,          ERegLTU ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangMalay,               ERegMYS ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangBrazilianPortuguese, ERegBRA ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangRomanian,            ERegROU ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangSerbian,             ERegSCG ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangLatinAmericanSpanish, ERegMEX ));

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangUkrainian,           ERegUKR ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangUrdu,                ERegPAK ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangVietnamese,          ERegVNM ) );

#ifdef __E32LANG_H__

    // 5.0

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangBasque,              ERegESP ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangGalician,            ERegESP ) );

#endif //__E32LANG_H__

#if !defined(__SERIES60_31__)

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangEnglish_Apac,        ERegGBR ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangEnglish_Taiwan,      ERegTWN ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangEnglish_HongKong,    ERegHKG ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangEnglish_Prc,         ERegCHN ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangEnglish_Japan,       ERegJPN ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangEnglish_Thailand,    ERegTHA ) );

    iLangRegionMappingHashSet.InsertL( TLanguageRegion( ELangMalay_Apac,          ERegMYS ) );

#endif //!defined(__SERIES60_31__)

    }

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

// CSsmLangSelCmd::Execute

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

//

void CSsmLangSelCmd::Execute( const TDesC8& /*aParams*/, TRequestStatus& aRequest )

    {

    FUNC_LOG;

    ASSERT_TRACE( !iClientStatus );

    ASSERT_TRACE( !IsActive() );

    ASSERT_TRACE( iEnv );

    aRequest = KRequestPending;

    iClientStatus = &aRequest;

    RFs* fsSession = &( const_cast<RFs&>( iEnv->Rfs() ) );

    //Get the default language

    TInt errorCode = SysLangUtil::GetDefaultLanguage( iDefaultLanguage, fsSession );

    ERROR( errorCode, "Failed to get default language" );

    //Get the language selected

    TInt lastSelectedLang = GetLastSelectedLang();

    TInt lastSelectedRegion ( KErrNotFound );

    TInt lastSelectedCollation ( KErrNotFound );

    //Reset error code to KErrNotFound

    errorCode = KErrNotFound;

    if ( KSettingAutomatic == lastSelectedLang )

        {

        //Auto selection is enabled

        SetIndividualSettingsToCentRep( KSettingAutomatic, KSettingAutomatic );

        PrepareNextList();

        }

    else if ( ValidateAndGetSettings( lastSelectedLang, lastSelectedRegion, lastSelectedCollation ) )

        {

        //Validate and get the selected Language, Region and Collation code

        errorCode = UseLocale( lastSelectedLang , lastSelectedRegion, lastSelectedCollation );

        ERROR( errorCode, "Failed to load selected Language, Region and Collation" );

        }

    //Load the default Language, Region and Collation in case of loading selected codes failed 

    //and auto selection is disabled.

    if( KErrNone != errorCode && KSettingAutomatic != lastSelectedLang )

        {

        //Validate and use the default codes 

        errorCode = ValidateAndUseDefaultLanguage();

        ERROR( errorCode, "Failed to load default Language, Region and Collation" );

        }

    }

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

// CSsmLangSelCmd::GetLastSelectedLang

//

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

//

TInt CSsmLangSelCmd::GetLastSelectedLang()

    {

    FUNC_LOG;

    TInt value( 0 );

    TInt errorCode = iMapperUtility->CrValue( KCRUidCommonEngineKeys, 

                                              KGSDisplayTxtLang,

                                              value );

    ERROR( errorCode, "Failed read KGSDisplayTxtLang CenRep key with error= %d"  );       

    INFO_1( "Last selected language is %d", value );

    return value;

    }

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

// CSsmLangSelCmd::SetIndividualSettingsToCentRep

//

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

//

TInt CSsmLangSelCmd::SetIndividualSettingsToCentRep( const TInt aRegion, const TInt aCollation )

    {

    FUNC_LOG;

    CRepository* cenrep = NULL;

    TRAPD( errorCode, cenrep = CRepository::NewL( KCRUidCommonEngineKeys ) );

    if ( KErrNone == errorCode )

        {

        //Set the Region CR with the given value

        errorCode = cenrep->Set( KGSRegion, aRegion );

        ERROR( errorCode, "Failed to Set Region code to CentRep, %d"  );                

        }

    else

        {

        INFO_1( "Failed to initialize cen rep %d", errorCode );        

        }

    if ( KErrNone == errorCode )

        {

        //Set the Collation CR with the given value

        errorCode = cenrep->Set( KGSCollation, aCollation );

        ERROR( errorCode, "Failed to Set Collation code to CentRep, %d"  );               

        }

    delete cenrep;

    return errorCode;

    }

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

// CSsmLangSelCmd::ValidateAndGetSettings

//

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

//

TBool CSsmLangSelCmd::ValidateAndGetSettings( const TInt aLastSelectedLang, TInt& aLastSelectedRegion, TInt& aLastSelectedCollation )

    {

    TBool isValid( EFalse );

    //Validate and get the selected settings

	TInt errorCode = KErrNone;

    TRAP( errorCode, isValid = ValidateAndGetSettingsL( aLastSelectedLang, aLastSelectedRegion, aLastSelectedCollation ) );

    ERROR_1( errorCode, "Validation failed for the selected Language, region and Collation with error %d", errorCode );

    return isValid;

    }

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

// CSsmLangSelCmd::ValidateAndGetSettingsL

//

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

//

TBool CSsmLangSelCmd::ValidateAndGetSettingsL( const TInt aLastSelectedLang, TInt& aLastSelectedRegion, TInt& aLastSelectedCollation )

    {

    TBool isValid( EFalse );

    //Get the selected Region and Collation 

    GetIndividualSettingsFromCentRepL( aLastSelectedRegion, aLastSelectedCollation );

    //Check whether the selected Language is valid or not

    if( IsValid( aLastSelectedLang ) )

        {

         if (KSettingAutomatic >= aLastSelectedRegion )

            {

            //Selected Region is Automatic. Get the Region associated 

            //with the Language being loaded

            if( ValidateAndGetMappedRegion( aLastSelectedLang, aLastSelectedRegion ) )

                {

                isValid = ETrue;

                }

            }

         else if( IsRegionValidL( aLastSelectedRegion ) )

                {

                //Selected Region is a valid Region

                isValid = ETrue;

                }

         if ( KSettingAutomatic >= aLastSelectedCollation )

             {

             //Collation is not set. Use the language code as the collation code

             aLastSelectedCollation = aLastSelectedLang;

             }

        }

    return isValid;

    }

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

// CSsmLangSelCmd::IsValid

//

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

//

TBool CSsmLangSelCmd::IsValid( const TInt aLanguage ) const

    {

    FUNC_LOG;

    ASSERT_TRACE( iValidLanguages );

    TBool valid( EFalse );

    TKeyArrayFix keyProp( 0, ECmpTInt );

    TInt index( KErrNotFound );

    // Returns zero if element is found.

    if ( 0 == iValidLanguages->Find( aLanguage, keyProp, index ) )

        {

        valid = ETrue;

        }

    return valid;

    }

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

// CSsmLangSelCmd::GetLanguageFromCentRep

//

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

//

TInt CSsmLangSelCmd::GetLanguageFromCentRep()

    {

    FUNC_LOG;

    TInt lang = iDefaultLanguage;

    TInt errorCode = iMapperUtility->CrValue( KCRUidSysLangUtil,

                                              KSysLangUtilSimLanguage,

                                              lang );

    ERROR_1( errorCode, "Failed to read language code from CenRep %d", 

             errorCode );

    return lang;

    }

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

// CSsmLangSelCmd::IsRegionValidL

//

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

//

TBool CSsmLangSelCmd::IsRegionValidL( const TInt aRegion ) const

    {

    FUNC_LOG;

    TInt index = iRegionsArray.FindL(TLanguageRegion(0, aRegion), &::RegionLangMappingIdentityRelation);

    return ETrue;

    }

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

// CSsmLangSelCmd::ValidRegionAndGetMappedLanguage

//

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

//

TBool CSsmLangSelCmd::ValidateAndGetMappedRegion( const TInt aLanguage, TInt& aRegion )

    {

    FUNC_LOG;

    TBool valid( EFalse );

    TLanguageRegion lang( aLanguage );

    //Find the Language - Region mapping for the given Language

    TInt index = iRegionsArray.Find( lang, &::LangRegionMappingIdentityRelation );

    if( 0 <= index )

        {

        //Set the Region associated with the given Language

        aRegion = iRegionsArray[index].iRegion;

        INFO_1( "ValidRegionAndGetMappedLanguage:: Found region %d", aRegion);

        valid = ETrue;

        }

    else