/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <com/sun/star/uno/Sequence.hxx>
#include <rtl/ustrbuf.hxx>
#include <rtl/instance.hxx>
#include <sal/log.hxx>
#include <i18nlangtag/mslangid.hxx>
#include <i18nlangtag/languagetag.hxx>
#include <tools/debug.hxx>
#include <unotools/syslocaleoptions.hxx>
#include <unotools/configmgr.hxx>
#include <unotools/configitem.hxx>
#include <com/sun/star/uno/Any.hxx>

#include "itemholder1.hxx"

#define CFG_READONLY_DEFAULT    false

using namespace osl;
using namespace utl;
using namespace com::sun::star::uno;
using namespace com::sun::star::lang;

namespace
{
    std::weak_ptr<SvtSysLocaleOptions_Impl> g_pSysLocaleOptions;
    struct CurrencyChangeLink
        : public rtl::Static<Link<LinkParamNone*,void>, CurrencyChangeLink> {};

Mutex& GetMutex()
{
    // #i77768# Due to a static reference in the toolkit lib
    // we need a mutex that lives longer than the svl library.
    // Otherwise the dtor would use a destructed mutex!!
    static Mutex* persistentMutex(new Mutex);

    return *persistentMutex;
}

}

class SvtSysLocaleOptions_Impl : public utl::ConfigItem
{
        LanguageTag             m_aRealLocale;
        LanguageTag             m_aRealUILocale;
        OUString                m_aLocaleString;    // en-US or de-DE or empty for SYSTEM
        OUString                m_aUILocaleString;    // en-US or de-DE or empty for SYSTEM
        OUString                m_aCurrencyString;  // USD-en-US or EUR-de-DE
        OUString                m_aDatePatternsString;  // "Y-M-D;M-D"
        bool                    m_bDecimalSeparator; //use decimal separator same as locale
        bool                    m_bIgnoreLanguageChange; //OS language change doesn't affect LO document language

        bool                    m_bROLocale;
        bool                    m_bROUILocale;
        bool                    m_bROCurrency;
        bool                    m_bRODatePatterns;
        bool                    m_bRODecimalSeparator;
        bool                    m_bROIgnoreLanguageChange;

        static  const Sequence< /* const */ OUString >  GetPropertyNames();
        void                    MakeRealLocale();
        void                    MakeRealUILocale();

    virtual void                ImplCommit() override;

public:
                                SvtSysLocaleOptions_Impl();
    virtual                     ~SvtSysLocaleOptions_Impl() override;

    virtual void                Notify( const css::uno::Sequence< OUString >& aPropertyNames ) override;

            const OUString&     GetLocaleString() const
                                    { return m_aLocaleString; }
            void                SetLocaleString( const OUString& rStr );

            void                SetUILocaleString( const OUString& rStr );

            const OUString&     GetCurrencyString() const
                                    { return m_aCurrencyString; }
            void                SetCurrencyString( const OUString& rStr );

            const OUString&     GetDatePatternsString() const
                                    { return m_aDatePatternsString; }
            void                SetDatePatternsString( const OUString& rStr );

            bool                IsDecimalSeparatorAsLocale() const { return m_bDecimalSeparator;}
            void                SetDecimalSeparatorAsLocale( bool bSet);

            bool                IsIgnoreLanguageChange() const { return m_bIgnoreLanguageChange;}
            void                SetIgnoreLanguageChange( bool bSet);

            bool                IsReadOnly( SvtSysLocaleOptions::EOption eOption ) const;
            const LanguageTag&  GetRealLocale() const { return m_aRealLocale; }
            const LanguageTag&  GetRealUILocale() const { return m_aRealUILocale; }
};

#define ROOTNODE_SYSLOCALE              "Setup/L10N"

#define PROPERTYNAME_LOCALE             "ooSetupSystemLocale"
#define PROPERTYNAME_UILOCALE           "ooLocale"
#define PROPERTYNAME_CURRENCY           "ooSetupCurrency"
#define PROPERTYNAME_DECIMALSEPARATOR   "DecimalSeparatorAsLocale"
#define PROPERTYNAME_DATEPATTERNS       "DateAcceptancePatterns"
#define PROPERTYNAME_IGNORELANGCHANGE   "IgnoreLanguageChange"

#define PROPERTYHANDLE_LOCALE           0
#define PROPERTYHANDLE_UILOCALE         1
#define PROPERTYHANDLE_CURRENCY         2
#define PROPERTYHANDLE_DECIMALSEPARATOR 3
#define PROPERTYHANDLE_DATEPATTERNS     4
#define PROPERTYHANDLE_IGNORELANGCHANGE 5

const Sequence< OUString > SvtSysLocaleOptions_Impl::GetPropertyNames()
{
    return Sequence< OUString >
    {
        PROPERTYNAME_LOCALE,
        PROPERTYNAME_UILOCALE,
        PROPERTYNAME_CURRENCY,
        PROPERTYNAME_DECIMALSEPARATOR,
        PROPERTYNAME_DATEPATTERNS,
        PROPERTYNAME_IGNORELANGCHANGE
    };
}

SvtSysLocaleOptions_Impl::SvtSysLocaleOptions_Impl()
    : ConfigItem( ROOTNODE_SYSLOCALE )
    , m_aRealLocale( LANGUAGE_SYSTEM)
    , m_aRealUILocale( LANGUAGE_SYSTEM)
    , m_bDecimalSeparator( true )
    , m_bIgnoreLanguageChange( false)
    , m_bROLocale(CFG_READONLY_DEFAULT)
    , m_bROUILocale(CFG_READONLY_DEFAULT)
    , m_bROCurrency(CFG_READONLY_DEFAULT)
    , m_bRODatePatterns(CFG_READONLY_DEFAULT)
    , m_bRODecimalSeparator(false)
    , m_bROIgnoreLanguageChange(false)

{
    const Sequence< OUString > aNames = GetPropertyNames();
    Sequence< Any > aValues = GetProperties( aNames );
    Sequence< sal_Bool > aROStates = GetReadOnlyStates( aNames );
    const Any* pValues = aValues.getConstArray();
    const sal_Bool* pROStates = aROStates.getConstArray();
    DBG_ASSERT( aValues.getLength() == aNames.getLength(), "GetProperties failed" );
    DBG_ASSERT( aROStates.getLength() == aNames.getLength(), "GetReadOnlyStates failed" );
    if ( aValues.getLength() == aNames.getLength() && aROStates.getLength() == aNames.getLength() )
    {
        for ( sal_Int32 nProp = 0; nProp < aNames.getLength(); nProp++ )
        {
            if ( pValues[nProp].hasValue() )
            {
                switch ( nProp )
                {
                case PROPERTYHANDLE_LOCALE :
                    {
                        OUString aStr;
                        if ( pValues[nProp] >>= aStr )
                            m_aLocaleString = aStr;
                        else
                        {
                            SAL_WARN( "unotools.config", "Wrong property type!" );
                        }
                        m_bROLocale = pROStates[nProp];
                    }
                    break;
                case PROPERTYHANDLE_UILOCALE :
                    {
                        OUString aStr;
                        if ( pValues[nProp] >>= aStr )
                            m_aUILocaleString = aStr;
                        else
                        {
                            SAL_WARN( "unotools.config", "Wrong property type!" );
                        }
                        m_bROUILocale = pROStates[nProp];
                    }
                    break;
                case PROPERTYHANDLE_CURRENCY :
                    {
                        OUString aStr;
                        if ( pValues[nProp] >>= aStr )
                            m_aCurrencyString = aStr;
                        else
                        {
                            SAL_WARN( "unotools.config", "Wrong property type!" );
                        }
                        m_bROCurrency = pROStates[nProp];
                    }
                    break;
                case  PROPERTYHANDLE_DECIMALSEPARATOR:
                    {
                        bool bValue = false;
                        if ( pValues[nProp] >>= bValue )
                            m_bDecimalSeparator = bValue;
                        else
                        {
                            SAL_WARN( "unotools.config", "Wrong property type!" );
                        }
                        m_bRODecimalSeparator = pROStates[nProp];
                        }
                    break;
                case PROPERTYHANDLE_DATEPATTERNS :
                    {
                        OUString aStr;
                        if ( pValues[nProp] >>= aStr )
                            m_aDatePatternsString = aStr;
                        else
                        {
                            SAL_WARN( "unotools.config", "Wrong property type!" );
                        }
                        m_bRODatePatterns = pROStates[nProp];
                    }
                    break;
                case PROPERTYHANDLE_IGNORELANGCHANGE :
                    {
                        bool bValue = false;
                        if ( pValues[nProp] >>= bValue )
                            m_bIgnoreLanguageChange = bValue;
                        else
                        {
                            SAL_WARN( "unotools.config", "Wrong property type!" );
                        }
                        m_bROIgnoreLanguageChange = pROStates[nProp];
                    }
                    break;
                default:
                    SAL_WARN( "unotools.config", "Wrong property type!" );
                }
            }
        }
    }
    EnableNotification( aNames );

    MakeRealLocale();
    MakeRealUILocale();
}

SvtSysLocaleOptions_Impl::~SvtSysLocaleOptions_Impl()
{
    assert(!IsModified()); // should have been committed
}

void SvtSysLocaleOptions_Impl::MakeRealLocale()
{
    if (m_aLocaleString.isEmpty())
    {
        LanguageType nLang = MsLangId::getSystemLanguage();
        m_aRealLocale.reset( nLang).makeFallback();
    }
    else
    {
        m_aRealLocale.reset( m_aLocaleString).makeFallback();
    }
}

void SvtSysLocaleOptions_Impl::MakeRealUILocale()
{
    if (m_aUILocaleString.isEmpty())
    {
        LanguageType nLang = MsLangId::getSystemUILanguage();
        m_aRealUILocale.reset( nLang).makeFallback();
    }
    else
    {
        m_aRealUILocale.reset( m_aUILocaleString).makeFallback();
    }
}

bool SvtSysLocaleOptions_Impl::IsReadOnly( SvtSysLocaleOptions::EOption eOption ) const
{
    bool bReadOnly = CFG_READONLY_DEFAULT;
    switch(eOption)
    {
        case SvtSysLocaleOptions::EOption::Locale :
            {
                bReadOnly = m_bROLocale;
                break;
            }
        case SvtSysLocaleOptions::EOption::Currency :
            {
                bReadOnly = m_bROCurrency;
                break;
            }
        case SvtSysLocaleOptions::EOption::DatePatterns :
            {
                bReadOnly = m_bRODatePatterns;
                break;
            }
    }
    return bReadOnly;
}

void SvtSysLocaleOptions_Impl::ImplCommit()
{
    const Sequence< OUString > aOrgNames = GetPropertyNames();
    sal_Int32 nOrgCount = aOrgNames.getLength();

    Sequence< OUString > aNames( nOrgCount );
    Sequence< Any > aValues( nOrgCount );

    OUString* pNames = aNames.getArray();
    Any* pValues = aValues.getArray();
    sal_Int32 nRealCount = 0;

    for ( sal_Int32 nProp = 0; nProp < nOrgCount; nProp++ )
    {
        switch ( nProp )
        {
            case PROPERTYHANDLE_LOCALE :
                {
                    if (!m_bROLocale)
                    {
                        pNames[nRealCount] = aOrgNames[nProp];
                        pValues[nRealCount] <<= m_aLocaleString;
                        ++nRealCount;
                    }
                }
                break;
            case PROPERTYHANDLE_UILOCALE :
                {
                    if (!m_bROUILocale)
                    {
                        pNames[nRealCount] = aOrgNames[nProp];
                        pValues[nRealCount] <<= m_aUILocaleString;
                        ++nRealCount;
                    }
                }
                break;
            case PROPERTYHANDLE_CURRENCY :
                {
                    if (!m_bROCurrency)
                    {
                        pNames[nRealCount] = aOrgNames[nProp];
                        pValues[nRealCount] <<= m_aCurrencyString;
                        ++nRealCount;
                    }
                }
                break;
            case PROPERTYHANDLE_DECIMALSEPARATOR:
                if( !m_bRODecimalSeparator )
                {
                    pNames[nRealCount] = aOrgNames[nProp];
                    pValues[nRealCount] <<= m_bDecimalSeparator;
                    ++nRealCount;
                }
            break;
            case PROPERTYHANDLE_DATEPATTERNS :
                if (!m_bRODatePatterns)
                {
                    pNames[nRealCount] = aOrgNames[nProp];
                    pValues[nRealCount] <<= m_aDatePatternsString;
                    ++nRealCount;
                }
                break;
            case PROPERTYHANDLE_IGNORELANGCHANGE :
                if (!m_bROIgnoreLanguageChange)
                {
                    pNames[nRealCount] = aOrgNames[nProp];
                    pValues[nRealCount] <<= m_bIgnoreLanguageChange;
                    ++nRealCount;
                }
                break;
            default:
                SAL_WARN( "unotools.config", "invalid index to save a path" );
        }
    }
    aNames.realloc(nRealCount);
    aValues.realloc(nRealCount);
    PutProperties( aNames, aValues );
}

void SvtSysLocaleOptions_Impl::SetLocaleString( const OUString& rStr )
{
    ConfigurationHints nHint = ConfigurationHints::Locale;
    {
        MutexGuard aGuard( GetMutex() );
        if (m_bROLocale || rStr == m_aLocaleString )
        {
            return;
        }
        m_aLocaleString = rStr;
        MakeRealLocale();
        LanguageTag::setConfiguredSystemLanguage( m_aRealLocale.getLanguageType() );
        SetModified();
        if ( m_aCurrencyString.isEmpty() )
            nHint |= ConfigurationHints::Currency;
    }
    NotifyListeners( nHint );
}

void SvtSysLocaleOptions_Impl::SetUILocaleString( const OUString& rStr )
{
    {
        MutexGuard aGuard( GetMutex() );
        if (m_bROUILocale || rStr == m_aUILocaleString )
        {
            return;
        }
        m_aUILocaleString = rStr;

        // as we can't switch UILocale at runtime, we only store changes in the configuration
        MakeRealUILocale();
        SetModified();
    }
    NotifyListeners( ConfigurationHints::UiLocale );
}

void SvtSysLocaleOptions_Impl::SetCurrencyString( const OUString& rStr )
{
    {
        MutexGuard aGuard( GetMutex() );
        if (m_bROCurrency || rStr == m_aCurrencyString )
        {
            return;
        }
        m_aCurrencyString = rStr;
        SetModified();
    }
    NotifyListeners( ConfigurationHints::Currency );
}

void SvtSysLocaleOptions_Impl::SetDatePatternsString( const OUString& rStr )
{
    {
        MutexGuard aGuard( GetMutex() );
        if (m_bRODatePatterns || rStr == m_aDatePatternsString )
        {
            return;
        }
        m_aDatePatternsString = rStr;
        SetModified();
    }
    NotifyListeners( ConfigurationHints::DatePatterns );
}

void SvtSysLocaleOptions_Impl::SetDecimalSeparatorAsLocale( bool bSet)
{
    {
        MutexGuard aGuard( GetMutex() );
        if(bSet == m_bDecimalSeparator)
        {
            return;
        }
        m_bDecimalSeparator = bSet;
        SetModified();
    }
    NotifyListeners( ConfigurationHints::DecSep );
}

void SvtSysLocaleOptions_Impl::SetIgnoreLanguageChange( bool bSet)
{
    {
        MutexGuard aGuard( GetMutex() );
        if(bSet == m_bIgnoreLanguageChange)
        {
            return;
        }
        m_bIgnoreLanguageChange = bSet;
        SetModified();
    }
    NotifyListeners( ConfigurationHints::IgnoreLang );
}

void SvtSysLocaleOptions_Impl::Notify( const Sequence< OUString >& seqPropertyNames )
{
    ConfigurationHints nHint = ConfigurationHints::NONE;
    Sequence< Any > seqValues = GetProperties( seqPropertyNames );
    Sequence< sal_Bool > seqROStates = GetReadOnlyStates( seqPropertyNames );
    sal_Int32 nCount = seqPropertyNames.getLength();
    for( sal_Int32 nProp = 0; nProp < nCount; ++nProp )
    {
        if( seqPropertyNames[nProp] == PROPERTYNAME_LOCALE )
        {
            DBG_ASSERT( seqValues[nProp].getValueTypeClass() == TypeClass_STRING, "Locale property type" );
            seqValues[nProp] >>= m_aLocaleString;
            m_bROLocale = seqROStates[nProp];
            nHint |= ConfigurationHints::Locale;
            if ( m_aCurrencyString.isEmpty() )
                nHint |= ConfigurationHints::Currency;
            MakeRealLocale();
        }
        if( seqPropertyNames[nProp] == PROPERTYNAME_UILOCALE )
        {
            DBG_ASSERT( seqValues[nProp].getValueTypeClass() == TypeClass_STRING, "Locale property type" );
            seqValues[nProp] >>= m_aUILocaleString;
            m_bROUILocale = seqROStates[nProp];
            nHint |= ConfigurationHints::UiLocale;
            MakeRealUILocale();
        }
        else if( seqPropertyNames[nProp] == PROPERTYNAME_CURRENCY )
        {
            DBG_ASSERT( seqValues[nProp].getValueTypeClass() == TypeClass_STRING, "Currency property type" );
            seqValues[nProp] >>= m_aCurrencyString;
            m_bROCurrency = seqROStates[nProp];
            nHint |= ConfigurationHints::Currency;
        }
        else if( seqPropertyNames[nProp] == PROPERTYNAME_DECIMALSEPARATOR )
        {
            seqValues[nProp] >>= m_bDecimalSeparator;
            m_bRODecimalSeparator = seqROStates[nProp];
        }
        else if( seqPropertyNames[nProp] == PROPERTYNAME_IGNORELANGCHANGE )
        {
            seqValues[nProp] >>= m_bIgnoreLanguageChange;
            m_bROIgnoreLanguageChange = seqROStates[nProp];
        }
        else if( seqPropertyNames[nProp] == PROPERTYNAME_DATEPATTERNS )
        {
            DBG_ASSERT( seqValues[nProp].getValueTypeClass() == TypeClass_STRING, "DatePatterns property type" );
            seqValues[nProp] >>= m_aDatePatternsString;
            m_bRODatePatterns = seqROStates[nProp];
            nHint |= ConfigurationHints::DatePatterns;
        }
    }
    if ( nHint != ConfigurationHints::NONE )
        NotifyListeners( nHint );
}

SvtSysLocaleOptions::SvtSysLocaleOptions()
{
    MutexGuard aGuard( GetMutex() );
    pImpl = g_pSysLocaleOptions.lock();
    if ( !pImpl )
    {
        pImpl = std::make_shared<SvtSysLocaleOptions_Impl>();
        g_pSysLocaleOptions = pImpl;
        if (!utl::ConfigManager::IsFuzzing())
            ItemHolder1::holdConfigItem(EItem::SysLocaleOptions);
    }
    pImpl->AddListener(this);
}

SvtSysLocaleOptions::~SvtSysLocaleOptions()
{
    MutexGuard aGuard( GetMutex() );
    pImpl->RemoveListener(this);
    pImpl.reset();
}

bool SvtSysLocaleOptions::IsModified() const
{
    MutexGuard aGuard( GetMutex() );
    return pImpl->IsModified();
}

void SvtSysLocaleOptions::Commit()
{
    MutexGuard aGuard( GetMutex() );
    pImpl->Commit();
}

void SvtSysLocaleOptions::BlockBroadcasts( bool bBlock )
{
    MutexGuard aGuard( GetMutex() );
    pImpl->BlockBroadcasts( bBlock );
}

void SvtSysLocaleOptions::SetLocaleConfigString( const OUString& rStr )
{
    pImpl->SetLocaleString( rStr );
}

void SvtSysLocaleOptions::SetUILocaleConfigString( const OUString& rStr )
{
    pImpl->SetUILocaleString( rStr );
}

const OUString& SvtSysLocaleOptions::GetCurrencyConfigString() const
{
    MutexGuard aGuard( GetMutex() );
    return pImpl->GetCurrencyString();
}

void SvtSysLocaleOptions::SetCurrencyConfigString( const OUString& rStr )
{
    pImpl->SetCurrencyString( rStr );
}

const OUString& SvtSysLocaleOptions::GetDatePatternsConfigString() const
{
    MutexGuard aGuard( GetMutex() );
    return pImpl->GetDatePatternsString();
}

void SvtSysLocaleOptions::SetDatePatternsConfigString( const OUString& rStr )
{
    pImpl->SetDatePatternsString( rStr );
}

bool SvtSysLocaleOptions::IsDecimalSeparatorAsLocale() const
{
    MutexGuard aGuard( GetMutex() );
    return pImpl->IsDecimalSeparatorAsLocale();
}

void SvtSysLocaleOptions::SetDecimalSeparatorAsLocale( bool bSet)
{
    pImpl->SetDecimalSeparatorAsLocale(bSet);
}

bool SvtSysLocaleOptions::IsIgnoreLanguageChange() const
{
    MutexGuard aGuard( GetMutex() );
    return pImpl->IsIgnoreLanguageChange();
}

void SvtSysLocaleOptions::SetIgnoreLanguageChange( bool bSet)
{
    pImpl->SetIgnoreLanguageChange(bSet);
}

bool SvtSysLocaleOptions::IsReadOnly( EOption eOption ) const
{
    MutexGuard aGuard( GetMutex() );
    return pImpl->IsReadOnly( eOption );
}

// static
void SvtSysLocaleOptions::GetCurrencyAbbrevAndLanguage( OUString& rAbbrev,
                                                        LanguageType& eLang,
                                                        const OUString& rConfigString )
{
    sal_Int32 nDelim = rConfigString.indexOf( '-' );
    if ( nDelim >= 0 )
    {
        rAbbrev = rConfigString.copy( 0, nDelim );
        OUString aIsoStr( rConfigString.copy( nDelim+1 ) );
        eLang = LanguageTag::convertToLanguageTypeWithFallback( aIsoStr );
    }
    else
    {
        rAbbrev = rConfigString;
        eLang = (rAbbrev.isEmpty() ? LANGUAGE_SYSTEM : LANGUAGE_NONE);
    }
}

// static
OUString SvtSysLocaleOptions::CreateCurrencyConfigString(
        const OUString& rAbbrev, LanguageType eLang )
{
    OUString aIsoStr( LanguageTag::convertToBcp47( eLang ) );
    if ( !aIsoStr.isEmpty() )
    {
        OUStringBuffer aStr( rAbbrev.getLength() + 1 + aIsoStr.getLength() );
        aStr.append( rAbbrev );
        aStr.append( '-' );
        aStr.append( aIsoStr );
        return aStr.makeStringAndClear();
    }
    else
        return rAbbrev;
}

// static
void SvtSysLocaleOptions::SetCurrencyChangeLink( const Link<LinkParamNone*,void>& rLink )
{
    MutexGuard aGuard( GetMutex() );
    DBG_ASSERT( !CurrencyChangeLink::get().IsSet(), "SvtSysLocaleOptions::SetCurrencyChangeLink: already set" );
    CurrencyChangeLink::get() = rLink;
}

// static
const Link<LinkParamNone*,void>& SvtSysLocaleOptions::GetCurrencyChangeLink()
{
    MutexGuard aGuard( GetMutex() );
    return CurrencyChangeLink::get();
}

void SvtSysLocaleOptions::ConfigurationChanged( utl::ConfigurationBroadcaster* p, ConfigurationHints nHint  )
{
    if ( nHint & ConfigurationHints::Currency )
    {
        const Link<LinkParamNone*,void>& rLink = GetCurrencyChangeLink();
        rLink.Call( nullptr );
    }

    ::utl::detail::Options::ConfigurationChanged( p, nHint );
}

LanguageTag SvtSysLocaleOptions::GetLanguageTag() const
{
    MutexGuard aGuard( GetMutex() );
    return LanguageTag( pImpl->GetLocaleString() );
}

const LanguageTag & SvtSysLocaleOptions::GetRealLanguageTag() const
{
    return pImpl->GetRealLocale();
}

const LanguageTag & SvtSysLocaleOptions::GetRealUILanguageTag() const
{
    return pImpl->GetRealUILocale();
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
