/* -*- 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 <iprcache.hxx>

#include <linguistic/misc.hxx>

#include <com/sun/star/linguistic2/DictionaryListEventFlags.hpp>

#include <osl/mutex.hxx>

#include <unotools/linguprops.hxx>

using namespace osl;

using namespace com::sun::star;

using namespace com::sun::star::beans;

using namespace com::sun::star::lang;

using namespace com::sun::star::uno;

using namespace com::sun::star::linguistic2;

namespace linguistic

{

#define NUM_FLUSH_PROPS     8

const struct

{

    OUString        aPropName;

    sal_Int32       nPropHdl;

} aFlushProperties[ NUM_FLUSH_PROPS ] =

{

    { UPN_IS_USE_DICTIONARY_LIST,         UPH_IS_USE_DICTIONARY_LIST },

    { UPN_IS_IGNORE_CONTROL_CHARACTERS,   UPH_IS_IGNORE_CONTROL_CHARACTERS },

    { UPN_IS_SPELL_UPPER_CASE,            UPH_IS_SPELL_UPPER_CASE },

    { UPN_IS_SPELL_WITH_DIGITS,           UPH_IS_SPELL_WITH_DIGITS },

    { UPN_IS_SPELL_CLOSED_COMPOUND,       UPH_IS_SPELL_CLOSED_COMPOUND },

    { UPN_IS_SPELL_HYPHENATED_COMPOUND,   UPH_IS_SPELL_HYPHENATED_COMPOUND }

};

static void lcl_AddAsPropertyChangeListener(

        const Reference< XPropertyChangeListener >& xListener,

        Reference< XLinguProperties > const &rPropSet )

{

    if (xListener.is() && rPropSet.is())

    {

        for (auto& aFlushProperty : aFlushProperties)

        {

            rPropSet->addPropertyChangeListener(

                aFlushProperty.aPropName, xListener );

        }

    }

}

static void lcl_RemoveAsPropertyChangeListener(

        const Reference< XPropertyChangeListener >& xListener,

        Reference< XLinguProperties > const &rPropSet )

{

    if (xListener.is() && rPropSet.is())

    {

        for (auto& aFlushProperty : aFlushProperties)

        {

            rPropSet->removePropertyChangeListener(

                    aFlushProperty.aPropName, xListener );

        }

    }

}

static bool lcl_IsFlushProperty( sal_Int32 nHandle )

{

    int i;

    for (i = 0;  i < NUM_FLUSH_PROPS;  ++i)

    {

        if (nHandle == aFlushProperties[i].nPropHdl)

            break;

    }

    return i < NUM_FLUSH_PROPS;

}

void FlushListener::SetDicList( Reference<XSearchableDictionaryList> const &rDL )

{

    MutexGuard  aGuard( GetLinguMutex() );

    if (xDicList != rDL)

    {

        if (xDicList.is())

            xDicList->removeDictionaryListEventListener( this );

        xDicList = rDL;

        if (xDicList.is())

            xDicList->addDictionaryListEventListener( this, false );

    }

}

void FlushListener::SetPropSet( Reference< XLinguProperties > const &rPS )

{

    MutexGuard  aGuard( GetLinguMutex() );

    if (xPropSet != rPS)

    {

        if (xPropSet.is())

            lcl_RemoveAsPropertyChangeListener( this, xPropSet );

        xPropSet = rPS;

        if (xPropSet.is())

            lcl_AddAsPropertyChangeListener( this, xPropSet );

    }

}

void SAL_CALL FlushListener::disposing( const EventObject& rSource )

{

    MutexGuard  aGuard( GetLinguMutex() );

    if (xDicList.is()  &&  rSource.Source == xDicList)

    {

        xDicList->removeDictionaryListEventListener( this );

        xDicList = nullptr;    //! release reference

    }

    if (xPropSet.is()  &&  rSource.Source == xPropSet)

    {

        lcl_RemoveAsPropertyChangeListener( this, xPropSet );

        xPropSet = nullptr;    //! release reference

    }

}

void SAL_CALL FlushListener::processDictionaryListEvent(

            const DictionaryListEvent& rDicListEvent )

{

    MutexGuard  aGuard( GetLinguMutex() );

    if (rDicListEvent.Source != xDicList)

        return;

    sal_Int16 nEvt = rDicListEvent.nCondensedEvent;

    sal_Int16 const nFlushFlags =

            DictionaryListEventFlags::ADD_NEG_ENTRY     |

            DictionaryListEventFlags::DEL_POS_ENTRY     |

            DictionaryListEventFlags::ACTIVATE_NEG_DIC  |

            DictionaryListEventFlags::DEACTIVATE_POS_DIC;

    bool bFlush = 0 != (nEvt & nFlushFlags);

    if (bFlush)

        mrSpellCache.Flush();

}

void SAL_CALL FlushListener::propertyChange(

            const PropertyChangeEvent& rEvt )

{

    MutexGuard  aGuard( GetLinguMutex() );

    if (rEvt.Source == xPropSet)

    {

        bool bFlush = lcl_IsFlushProperty( rEvt.PropertyHandle );

        if (bFlush)

            mrSpellCache.Flush();

    }

}

SpellCache::SpellCache()

{

    mxFlushLstnr = new FlushListener( *this );

    Reference<XSearchableDictionaryList> aDictionaryList(GetDictionaryList());

    mxFlushLstnr->SetDicList( aDictionaryList ); //! after reference is established

    Reference<XLinguProperties> aPropertySet(GetLinguProperties());

    mxFlushLstnr->SetPropSet( aPropertySet );    //! after reference is established

}

SpellCache::~SpellCache()

{

    Reference<XSearchableDictionaryList>  aEmptyList;

    Reference<XLinguProperties>     aEmptySet;

    mxFlushLstnr->SetDicList( aEmptyList );

    mxFlushLstnr->SetPropSet( aEmptySet );

}

void SpellCache::Flush()

{

    MutexGuard  aGuard( GetLinguMutex() );

    // clear word list

    LangWordList_t().swap(aWordLists);

}

bool SpellCache::CheckWord( const OUString& rWord, LanguageType nLang )

{

    MutexGuard  aGuard( GetLinguMutex() );

    WordList_t &rList = aWordLists[ nLang ];

    const WordList_t::const_iterator aIt = rList.find( rWord );

    return aIt != rList.end();

}

void SpellCache::AddWord( const OUString& rWord, LanguageType nLang )

{

    MutexGuard  aGuard( GetLinguMutex() );

    WordList_t & rList = aWordLists[ nLang ];

    // occasional clean-up...

    if (rList.size() > 500)

        rList.clear();

    rList.insert( rWord );

}

}   // namespace linguistic

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