/*************************************************************************
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * Copyright 2000, 2010 Oracle and/or its affiliates.
 *
 * OpenOffice.org - a multi-platform office productivity suite
 *
 * This file is part of OpenOffice.org.
 *
 * OpenOffice.org is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * only, as published by the Free Software Foundation.
 *
 * OpenOffice.org is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License version 3 for more details
 * (a copy is included in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU Lesser General Public License
 * version 3 along with OpenOffice.org.  If not, see
 * <http://www.openoffice.org/license.html>
 * for a copy of the LGPLv3 License.
 *
 ************************************************************************/

// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_linguistic.hxx"

#include <string.h>

#include "iprcache.hxx"
#include "linguistic/misc.hxx"

#include <com/sun/star/linguistic2/DictionaryListEventFlags.hpp>
#include <tools/debug.hxx>
#include <osl/mutex.hxx>

//#define IPR_DEF_CACHE_SIZE        503
#define IPR_DEF_CACHE_MAX       375
#define IPR_DEF_CACHE_MAXINPUT  200

#ifdef DBG_STATISTIC
#include <tools/stream.hxx>

//#define IPR_CACHE_SIZE        nTblSize
#define IPR_CACHE_MAX       nMax
#define IPR_CACHE_MAXINPUT  nMaxInput

#else

//#define IPR_CACHE_SIZE        IPR_DEF_CACHE_SIZE
#define IPR_CACHE_MAX       IPR_DEF_CACHE_MAX
#define IPR_CACHE_MAXINPUT  IPR_DEF_CACHE_MAXINPUT

#endif
#include <unotools/processfactory.hxx>

#include <linguistic/lngprops.hxx>

using namespace utl;
using namespace osl;
using namespace rtl;
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     6

static const struct
{
    const char *pPropName;
    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_CAPITALIZATION,        UPH_IS_SPELL_CAPITALIZATION }
};


static void lcl_AddAsPropertyChangeListener(
        Reference< XPropertyChangeListener > xListener,
        Reference< XPropertySet > &rPropSet )
{
    if (xListener.is() && rPropSet.is())
    {
        for (int i = 0;  i < NUM_FLUSH_PROPS;  ++i)
        {
            rPropSet->addPropertyChangeListener(
                    A2OU(aFlushProperties[i].pPropName), xListener );
        }
    }
}


static void lcl_RemoveAsPropertyChangeListener(
        Reference< XPropertyChangeListener > xListener,
        Reference< XPropertySet > &rPropSet )
{
    if (xListener.is() && rPropSet.is())
    {
        for (int i = 0;  i < NUM_FLUSH_PROPS;  ++i)
        {
            rPropSet->removePropertyChangeListener(
                    A2OU(aFlushProperties[i].pPropName), xListener );
        }
    }
}


static sal_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;
}


FlushListener::FlushListener( Flushable *pFO )
{
    SetFlushObj( pFO );
}


FlushListener::~FlushListener()
{
}


void FlushListener::SetDicList( Reference<XDictionaryList> &rDL )
{
    MutexGuard  aGuard( GetLinguMutex() );

    if (xDicList != rDL)
    {
        if (xDicList.is())
            xDicList->removeDictionaryListEventListener( this );

        xDicList = rDL;
        if (xDicList.is())
            xDicList->addDictionaryListEventListener( this, sal_False );
    }
}


void FlushListener::SetPropSet( Reference< XPropertySet > &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 )
        throw(RuntimeException)
{
    MutexGuard  aGuard( GetLinguMutex() );

    if (xDicList.is()  &&  rSource.Source == xDicList)
    {
        xDicList->removeDictionaryListEventListener( this );
        xDicList = NULL;    //! release reference
    }
    if (xPropSet.is()  &&  rSource.Source == xPropSet)
    {
        lcl_RemoveAsPropertyChangeListener( this, xPropSet );
        xPropSet = NULL;    //! release reference
    }
}


void SAL_CALL FlushListener::processDictionaryListEvent(
            const DictionaryListEvent& rDicListEvent )
        throw(RuntimeException)
{
    MutexGuard  aGuard( GetLinguMutex() );

    if (rDicListEvent.Source == xDicList)
    {
        sal_Int16 nEvt = rDicListEvent.nCondensedEvent;
        sal_Int16 nFlushFlags =
                DictionaryListEventFlags::ADD_NEG_ENTRY     |
                DictionaryListEventFlags::DEL_POS_ENTRY     |
                DictionaryListEventFlags::ACTIVATE_NEG_DIC  |
                DictionaryListEventFlags::DEACTIVATE_POS_DIC;
        sal_Bool bFlush = 0 != (nEvt & nFlushFlags);

        DBG_ASSERT( pFlushObj, "missing object (NULL pointer)" );
        if (bFlush && pFlushObj != NULL)
            pFlushObj->Flush();
    }
}


void SAL_CALL FlushListener::propertyChange(
            const PropertyChangeEvent& rEvt )
        throw(RuntimeException)
{
    MutexGuard  aGuard( GetLinguMutex() );

    if (rEvt.Source == xPropSet)
    {
        sal_Bool bFlush = lcl_IsFlushProperty( rEvt.PropertyHandle );

        DBG_ASSERT( pFlushObj, "missing object (NULL pointer)" );
        if (bFlush && pFlushObj != NULL)
            pFlushObj->Flush();
    }
}


///////////////////////////////////////////////////////////////////////////

SpellCache::SpellCache()
{
    pFlushLstnr = new FlushListener( this );
    xFlushLstnr = pFlushLstnr;
    Reference<XDictionaryList> aDictionaryList(GetDictionaryList());
    pFlushLstnr->SetDicList( aDictionaryList ); //! after reference is established
    Reference<XPropertySet> aPropertySet(GetLinguProperties());
    pFlushLstnr->SetPropSet( aPropertySet );    //! after reference is established
}

SpellCache::~SpellCache()
{
    Reference<XDictionaryList>  aEmptyList;
    Reference<XPropertySet>     aEmptySet;
    pFlushLstnr->SetDicList( aEmptyList );
    pFlushLstnr->SetPropSet( aEmptySet );
}

void SpellCache::Flush()
{
    MutexGuard  aGuard( GetLinguMutex() );
    // clear word list
    LangWordList_t aEmpty;
    aWordLists.swap( aEmpty );
}

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