/* -*- 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 file754
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <memory>
#include <optional>
#include <sal/log.hxx>
#include <svl/lngmisc.hxx>
#include <ucbhelper/content.hxx>
#include <i18nlangtag/languagetag.hxx>
#include <com/sun/star/beans/XPropertySet.hpp>
#include <com/sun/star/beans/XFastPropertySet.hpp>
#include <com/sun/star/beans/PropertyValues.hpp>
#include <com/sun/star/frame/Desktop.hpp>
#include <com/sun/star/frame/XStorable.hpp>
#include <com/sun/star/linguistic2/DictionaryType.hpp>
#include <com/sun/star/linguistic2/DictionaryList.hpp>
#include <com/sun/star/linguistic2/LinguProperties.hpp>
#include <com/sun/star/ucb/XCommandEnvironment.hpp>
#include <com/sun/star/uno/Sequence.hxx>
#include <com/sun/star/uno/Reference.h>
#include <comphelper/lok.hxx>
#include <comphelper/processfactory.hxx>
#include <comphelper/sequence.hxx>
#include <unotools/charclass.hxx>
#include <unotools/linguprops.hxx>
#include <unotools/localedatawrapper.hxx>
#include <svtools/strings.hrc>
#include <unotools/resmgr.hxx>
#include <o3tl/string_view.hxx>

#include <linguistic/misc.hxx>
#include <linguistic/hyphdta.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::i18n;
using namespace com::sun::star::linguistic2;

namespace linguistic
{

//!! multi-thread safe mutex for all platforms !!
osl::Mutex & GetLinguMutex()
{
    static osl::Mutex SINGLETON;
    return SINGLETON;
}

const LocaleDataWrapper & GetLocaleDataWrapper( LanguageType nLang )
{
    static std::optional<LocaleDataWrapper> oLclDtaWrp;
    if (!oLclDtaWrp || oLclDtaWrp->getLoadedLanguageTag().getLanguageType() != nLang)
        oLclDtaWrp.emplace(LanguageTag( nLang ));
    return *oLclDtaWrp;
}

LanguageType LinguLocaleToLanguage( const css::lang::Locale& rLocale )
{
    if ( rLocale.Language.isEmpty() )
        return LANGUAGE_NONE;
    return LanguageTag::convertToLanguageType( rLocale );
}

css::lang::Locale LinguLanguageToLocale( LanguageType nLanguage )
{
    if (nLanguage == LANGUAGE_NONE)
        return css::lang::Locale();
    return LanguageTag::convertToLocale( nLanguage);
}

bool LinguIsUnspecified( LanguageType nLanguage )
{
    return nLanguage.anyOf(
         LANGUAGE_NONE,
         LANGUAGE_UNDETERMINED,
         LANGUAGE_MULTIPLE);
}

// When adding anything keep both LinguIsUnspecified() methods in sync!
// For mappings between language code string and LanguageType see
// i18nlangtag/source/isolang/isolang.cxx

bool LinguIsUnspecified( std::u16string_view rBcp47 )
{
    if (rBcp47.size() != 3)
        return false;
    return rBcp47 == u"zxx" || rBcp47 == u"und" || rBcp47 == u"mul";
}

static sal_Int32 Minimum( sal_Int32 n1, sal_Int32 n2, sal_Int32 n3 )
{
    return std::min(std::min(n1, n2), n3);
}

namespace {

class IntArray2D
{
private:
    std::unique_ptr<sal_Int32[]>  pData;
    int                           n1, n2;

public:
    IntArray2D( int nDim1, int nDim2 );

    sal_Int32 & Value( int i, int k  );
};

}

IntArray2D::IntArray2D( int nDim1, int nDim2 )
{
    n1 = nDim1;
    n2 = nDim2;
    pData.reset( new sal_Int32[n1 * n2] );
}

sal_Int32 & IntArray2D::Value( int i, int k  )
{
    assert( (0 <= i && i < n1) && "first index out of range" );
    assert( (0 <= k && k < n2) && "second index out of range" );
    assert( (i * n2 + k < n1 * n2) && "index out of range" );
    return pData[ i * n2 + k ];
}

sal_Int32 LevDistance( std::u16string_view rTxt1, std::u16string_view rTxt2 )
{
    sal_Int32 nLen1 = rTxt1.size();
    sal_Int32 nLen2 = rTxt2.size();

    if (nLen1 == 0)
        return nLen2;
    if (nLen2 == 0)
        return nLen1;

    IntArray2D aData( nLen1 + 1, nLen2 + 1 );

    sal_Int32 i, k;
    for (i = 0;  i <= nLen1;  ++i)
        aData.Value(i, 0) = i;
    for (k = 0;  k <= nLen2;  ++k)
        aData.Value(0, k) = k;
    for (i = 1;  i <= nLen1;  ++i)
    {
        for (k = 1;  k <= nLen2;  ++k)
        {
            sal_Unicode c1i = rTxt1[i - 1];
            sal_Unicode c2k = rTxt2[k - 1];
            sal_Int32 nCost = c1i == c2k ? 0 : 1;
            sal_Int32 nNew = Minimum( aData.Value(i-1, k  ) + 1,
                                       aData.Value(i  , k-1) + 1,
                                       aData.Value(i-1, k-1) + nCost );
            // take transposition (exchange with left or right char) in account
            if (2 < i && 2 < k)
            {
                int nT = aData.Value(i-2, k-2) + 1;
                if (rTxt1[i - 2] != c1i)
                    ++nT;
                if (rTxt2[k - 2] != c2k)
                    ++nT;
                if (nT < nNew)
                    nNew = nT;
            }

            aData.Value(i, k) = nNew;
        }
    }
    sal_Int32 nDist = aData.Value(nLen1, nLen2);
    return nDist;
}

bool IsUseDicList( const PropertyValues &rProperties,
        const uno::Reference< XPropertySet > &rxProp )
{
    bool bRes = true;

    const PropertyValue *pVal = std::find_if(rProperties.begin(), rProperties.end(),
        [](const PropertyValue& rVal) { return UPH_IS_USE_DICTIONARY_LIST == rVal.Handle; });

    if (pVal != rProperties.end())
    {
        pVal->Value >>= bRes;
    }
    else  // no temporary value found in 'rProperties'
    {
        uno::Reference< XFastPropertySet > xFast( rxProp, UNO_QUERY );
        if (xFast.is())
            xFast->getFastPropertyValue( UPH_IS_USE_DICTIONARY_LIST ) >>= bRes;
    }

    return bRes;
}

bool IsIgnoreControlChars( const PropertyValues &rProperties,
        const uno::Reference< XPropertySet > &rxProp )
{
    bool bRes = true;

    const PropertyValue *pVal = std::find_if(rProperties.begin(), rProperties.end(),
        [](const PropertyValue& rVal) { return UPH_IS_IGNORE_CONTROL_CHARACTERS == rVal.Handle; });

    if (pVal != rProperties.end())
    {
        pVal->Value >>= bRes;
    }
    else  // no temporary value found in 'rProperties'
    {
        uno::Reference< XFastPropertySet > xFast( rxProp, UNO_QUERY );
        if (xFast.is())
            xFast->getFastPropertyValue( UPH_IS_IGNORE_CONTROL_CHARACTERS ) >>= bRes;
    }

    return bRes;
}

static bool lcl_HasHyphInfo( const uno::Reference<XDictionaryEntry> &xEntry )
{
    bool bRes = false;
    if (xEntry.is())
    {
        // there has to be (at least one) '=' or '[' denoting a hyphenation position
        // and it must not be before any character of the word
        sal_Int32 nIdx = xEntry->getDictionaryWord().indexOf( '=' );
        if (nIdx == -1)
            nIdx = xEntry->getDictionaryWord().indexOf( '[' );
        bRes = nIdx != -1  &&  nIdx != 0;
    }
    return bRes;
}

uno::Reference< XDictionaryEntry > SearchDicList(
        const uno::Reference< XSearchableDictionaryList > &xDicList,
        const OUString &rWord, LanguageType nLanguage,
        bool bSearchPosDics, bool bSearchSpellEntry )
{
    MutexGuard  aGuard( GetLinguMutex() );

    uno::Reference< XDictionaryEntry > xEntry;

    if (!xDicList.is())
        return xEntry;

    const uno::Sequence< uno::Reference< XDictionary > >
            aDics( xDicList->getDictionaries() );
    const uno::Reference< XDictionary >
            *pDic = aDics.getConstArray();
    sal_Int32 nDics = xDicList->getCount();

    sal_Int32 i;
    for (i = 0;  i < nDics;  i++)
    {
        uno::Reference< XDictionary > axDic = pDic[i];

        DictionaryType  eType = axDic->getDictionaryType();
        LanguageType    nLang = LinguLocaleToLanguage( axDic->getLocale() );

        if ( axDic.is() && axDic->isActive()
            && (nLang == nLanguage  ||  LinguIsUnspecified( nLang)) )
        {
            // DictionaryType_MIXED is deprecated
            SAL_WARN_IF(eType == DictionaryType_MIXED, "linguistic", "unexpected dictionary type");

            if (   (!bSearchPosDics  &&  eType == DictionaryType_NEGATIVE)
                || ( bSearchPosDics  &&  eType == DictionaryType_POSITIVE))
            {
                xEntry = axDic->getEntry( rWord );
                if ( xEntry.is() && (bSearchSpellEntry || lcl_HasHyphInfo( xEntry )) )
                    break;
                xEntry = nullptr;
            }
        }
    }

    return xEntry;
}

bool SaveDictionaries( const uno::Reference< XSearchableDictionaryList > &xDicList )
{
    if (!xDicList.is())
        return true;

    bool bRet = true;

    const Sequence< uno::Reference< XDictionary >  > aDics( xDicList->getDictionaries() );
    for (const uno::Reference<XDictionary>& rDic : aDics)
    {
        try
        {
            uno::Reference< frame::XStorable >  xStor( rDic, UNO_QUERY );
            if (xStor.is())
            {
                if (!xStor->isReadonly() && xStor->hasLocation())
                    xStor->store();
            }
        }
        catch(uno::Exception &)
        {
            bRet = false;
        }
    }

    return bRet;
}

DictionaryError AddEntryToDic(
        uno::Reference< XDictionary > const &rxDic,
        const OUString &rWord, bool bIsNeg,
        const OUString &rRplcTxt,
        bool bStripDot )
{
    if (!rxDic.is())
        return DictionaryError::NOT_EXISTS;

    OUString aTmp( rWord );
    if (bStripDot)
    {
        sal_Int32 nLen = rWord.getLength();
        if (nLen > 0  &&  '.' == rWord[ nLen - 1])
        {
            // remove trailing '.'
            // (this is the official way to do this :-( )
            aTmp = aTmp.copy( 0, nLen - 1 );
        }
    }
    bool bAddOk = rxDic->add( aTmp, bIsNeg, rRplcTxt );

    DictionaryError nRes = DictionaryError::NONE;
    if (!bAddOk)
    {
        if (rxDic->isFull())
            nRes = DictionaryError::FULL;
        else
        {
            uno::Reference< frame::XStorable >  xStor( rxDic, UNO_QUERY );
            if (xStor.is() && xStor->isReadonly())
                nRes = DictionaryError::READONLY;
            else
                nRes = DictionaryError::UNKNOWN;
        }
    }

    return nRes;
}

std::vector< LanguageType >
    LocaleSeqToLangVec( uno::Sequence< Locale > const &rLocaleSeq )
{
    std::vector< LanguageType >   aLangs;
    aLangs.reserve(rLocaleSeq.getLength());

    std::transform(rLocaleSeq.begin(), rLocaleSeq.end(), std::back_inserter(aLangs),
        [](const Locale& rLocale) { return LinguLocaleToLanguage(rLocale); });

    return aLangs;
}

uno::Sequence< sal_Int16 >
     LocaleSeqToLangSeq( uno::Sequence< Locale > const &rLocaleSeq )
{
    std::vector<sal_Int16> aLangs;
    aLangs.reserve(rLocaleSeq.getLength());

    std::transform(rLocaleSeq.begin(), rLocaleSeq.end(), std::back_inserter(aLangs),
        [](const Locale& rLocale) { return static_cast<sal_uInt16>(LinguLocaleToLanguage(rLocale)); });

    return comphelper::containerToSequence(aLangs);
}
bool    IsReadOnly( const OUString &rURL, bool *pbExist )
{
    bool bRes = false;
    bool bExists = false;

    if (!rURL.isEmpty())
    {
        try
        {
            uno::Reference< css::ucb::XCommandEnvironment > xCmdEnv;
            ::ucbhelper::Content aContent( rURL, xCmdEnv, comphelper::getProcessComponentContext() );

            bExists = aContent.isDocument();
            if (bExists)
            {
                Any aAny( aContent.getPropertyValue( "IsReadOnly" ) );
                aAny >>= bRes;
            }
        }
        catch (Exception &)
        {
            bRes = true;
        }
    }

    if (pbExist)
        *pbExist = bExists;
    return bRes;
}

static bool GetAltSpelling( sal_Int16 &rnChgPos, sal_Int16 &rnChgLen, OUString &rRplc,
        uno::Reference< XHyphenatedWord > const &rxHyphWord )
{
    bool bRes = rxHyphWord->isAlternativeSpelling();
    if (bRes)
    {
        OUString aWord( rxHyphWord->getWord() ),
                 aHyphenatedWord( rxHyphWord->getHyphenatedWord() );
        sal_Int16   nHyphenationPos     = rxHyphWord->getHyphenationPos();
        /*sal_Int16   nHyphenPos          = rxHyphWord->getHyphenPos()*/;
        const sal_Unicode *pWord    = aWord.getStr(),
                          *pAltWord = aHyphenatedWord.getStr();

        // at least char changes directly left or right to the hyphen
        // should(!) be handled properly...
        //! nHyphenationPos and nHyphenPos differ at most by 1 (see above)
        //! Beware: eg "Schiffahrt" in German (pre spelling reform)
        //! proves to be a bit nasty (nChgPosLeft and nChgPosRight overlap
        //! to an extend.)

        // find first different char from left
        sal_Int32   nPosL    = 0,
                    nAltPosL = 0;
        for (sal_Int16 i = 0 ;  pWord[ nPosL ] == pAltWord[ nAltPosL ];  nPosL++, nAltPosL++, i++)
        {
            // restrict changes area beginning to the right to
            // the char immediately following the hyphen.
            //! serves to insert the additional "f" in "Schiffahrt" at
            //! position 5 rather than position 6.
            if (i >= nHyphenationPos + 1)
                break;
        }

        // find first different char from right
        sal_Int32   nPosR    = aWord.getLength() - 1,
                    nAltPosR = aHyphenatedWord.getLength() - 1;
        for ( ;  nPosR >= nPosL  &&  nAltPosR >= nAltPosL
                    &&  pWord[ nPosR ] == pAltWord[ nAltPosR ];
                nPosR--, nAltPosR--)
            ;

        rnChgPos = sal::static_int_cast< sal_Int16 >(nPosL);
        rnChgLen = sal::static_int_cast< sal_Int16 >(nAltPosR - nPosL);
        assert( rnChgLen >= 0 && "nChgLen < 0");

        sal_Int32 nTxtStart = nPosL;
        sal_Int32 nTxtLen   = nAltPosR - nPosL + 1;
        rRplc = aHyphenatedWord.copy( nTxtStart, nTxtLen );
    }
    return bRes;
}

static sal_Int16 GetOrigWordPos( std::u16string_view rOrigWord, sal_Int16 nPos )
{
    sal_Int32 nLen = rOrigWord.size();
    sal_Int32 i = -1;
    while (nPos >= 0  &&  i++ < nLen)
    {
        sal_Unicode cChar = rOrigWord[i];
        bool bSkip = IsHyphen( cChar ) || IsControlChar( cChar );
        if (!bSkip)
            --nPos;
    }
    return sal::static_int_cast< sal_Int16 >((0 <= i  &&  i < nLen) ? i : -1);
}

sal_Int32 GetPosInWordToCheck( std::u16string_view rTxt, sal_Int32 nPos )
{
    sal_Int32 nRes = -1;
    sal_Int32 nLen = rTxt.size();
    if (0 <= nPos  &&  nPos < nLen)
    {
        nRes = 0;
        for (sal_Int32 i = 0;  i < nPos;  ++i)
        {
            sal_Unicode cChar = rTxt[i];
            bool bSkip = IsHyphen( cChar ) || IsControlChar( cChar );
            if (!bSkip)
                ++nRes;
        }
    }
    return nRes;
}

uno::Reference< XHyphenatedWord > RebuildHyphensAndControlChars(
        const OUString &rOrigWord,
        uno::Reference< XHyphenatedWord > const &rxHyphWord )
{
    uno::Reference< XHyphenatedWord > xRes;
    if (!rOrigWord.isEmpty() && rxHyphWord.is())
    {
        sal_Int16    nChgPos = 0,
                 nChgLen = 0;
        OUString aRplc;
        bool bAltSpelling = GetAltSpelling( nChgPos, nChgLen, aRplc, rxHyphWord );

        OUString aOrigHyphenatedWord;
        sal_Int16 nOrigHyphenPos        = -1;
        sal_Int16 nOrigHyphenationPos   = -1;
        if (!bAltSpelling)
        {
            aOrigHyphenatedWord = rOrigWord;
            nOrigHyphenPos      = GetOrigWordPos( rOrigWord, rxHyphWord->getHyphenPos() );
            nOrigHyphenationPos = GetOrigWordPos( rOrigWord, rxHyphWord->getHyphenationPos() );
        }
        else
        {
            //! should at least work with the German words
            //! B-"u-c-k-er and Sc-hif-fah-rt

            sal_Int16 nPos = GetOrigWordPos( rOrigWord, nChgPos );

            // get words like Sc-hif-fah-rt to work correct
            sal_Int16 nHyphenationPos = rxHyphWord->getHyphenationPos();
            if (nChgPos > nHyphenationPos)
                --nPos;

            std::u16string_view aLeft = rOrigWord.subView( 0, nPos );
            std::u16string_view aRight = rOrigWord.subView( nPos ); // FIXME: changes at the right side

            aOrigHyphenatedWord =  aLeft + aRplc + aRight;

            nOrigHyphenPos      = sal::static_int_cast< sal_Int16 >(aLeft.size() +
                                  rxHyphWord->getHyphenPos() - nChgPos);
            nOrigHyphenationPos = GetOrigWordPos( rOrigWord, nHyphenationPos );
        }

        if (nOrigHyphenPos == -1  ||  nOrigHyphenationPos == -1)
        {
            SAL_WARN( "linguistic", "failed to get nOrigHyphenPos or nOrigHyphenationPos" );
        }
        else
        {
            LanguageType nLang = LinguLocaleToLanguage( rxHyphWord->getLocale() );
            xRes = new HyphenatedWord(
                        rOrigWord, nLang, nOrigHyphenationPos,
                        aOrigHyphenatedWord, nOrigHyphenPos );
        }

    }
    return xRes;
}

bool IsUpper( const OUString &rText, sal_Int32 nPos, sal_Int32 nLen, LanguageType nLanguage )
{
    CharClass aCC(( LanguageTag( nLanguage ) ));
    return aCC.isUpper( rText, nPos, nLen );
}

CapType capitalType(const OUString& aTerm, CharClass const * pCC)
{
        sal_Int32 tlen = aTerm.getLength();
        if (!pCC || !tlen)
            return CapType::UNKNOWN;

        sal_Int32 nc = 0;
        for (sal_Int32 tindex = 0; tindex < tlen; ++tindex)
        {
            if (pCC->getCharacterType(aTerm,tindex) &
               css::i18n::KCharacterType::UPPER) nc++;
        }

        if (nc == 0)
            return CapType::NOCAP;
        if (nc == tlen)
            return CapType::ALLCAP;
        if ((nc == 1) && (pCC->getCharacterType(aTerm,0) &
              css::i18n::KCharacterType::UPPER))
            return CapType::INITCAP;

        return CapType::MIXED;
}

// sorted(!) array of unicode ranges for code points that are exclusively(!) used as numbers
// and thus may NOT not be part of names or words like the Chinese/Japanese number characters
const sal_uInt32 the_aDigitZeroes [] =
{
    0x00000030, //0039    ; Decimal # Nd  [10] DIGIT ZERO..DIGIT NINE
    0x00000660, //0669    ; Decimal # Nd  [10] ARABIC-INDIC DIGIT ZERO..ARABIC-INDIC DIGIT NINE
    0x000006F0, //06F9    ; Decimal # Nd  [10] EXTENDED ARABIC-INDIC DIGIT ZERO..EXTENDED ARABIC-INDIC DIGIT NINE
    0x000007C0, //07C9    ; Decimal # Nd  [10] NKO DIGIT ZERO..NKO DIGIT NINE
    0x00000966, //096F    ; Decimal # Nd  [10] DEVANAGARI DIGIT ZERO..DEVANAGARI DIGIT NINE
    0x000009E6, //09EF    ; Decimal # Nd  [10] BENGALI DIGIT ZERO..BENGALI DIGIT NINE
    0x00000A66, //0A6F    ; Decimal # Nd  [10] GURMUKHI DIGIT ZERO..GURMUKHI DIGIT NINE
    0x00000AE6, //0AEF    ; Decimal # Nd  [10] GUJARATI DIGIT ZERO..GUJARATI DIGIT NINE
    0x00000B66, //0B6F    ; Decimal # Nd  [10] ODIA DIGIT ZERO..ODIA DIGIT NINE
    0x00000BE6, //0BEF    ; Decimal # Nd  [10] TAMIL DIGIT ZERO..TAMIL DIGIT NINE
    0x00000C66, //0C6F    ; Decimal # Nd  [10] TELUGU DIGIT ZERO..TELUGU DIGIT NINE
    0x00000CE6, //0CEF    ; Decimal # Nd  [10] KANNADA DIGIT ZERO..KANNADA DIGIT NINE
    0x00000D66, //0D6F    ; Decimal # Nd  [10] MALAYALAM DIGIT ZERO..MALAYALAM DIGIT NINE
    0x00000E50, //0E59    ; Decimal # Nd  [10] THAI DIGIT ZERO..THAI DIGIT NINE
    0x00000ED0, //0ED9    ; Decimal # Nd  [10] LAO DIGIT ZERO..LAO DIGIT NINE
    0x00000F20, //0F29    ; Decimal # Nd  [10] TIBETAN DIGIT ZERO..TIBETAN DIGIT NINE
    0x00001040, //1049    ; Decimal # Nd  [10] MYANMAR DIGIT ZERO..MYANMAR DIGIT NINE
    0x00001090, //1099    ; Decimal # Nd  [10] MYANMAR SHAN DIGIT ZERO..MYANMAR SHAN DIGIT NINE
    0x000017E0, //17E9    ; Decimal # Nd  [10] KHMER DIGIT ZERO..KHMER DIGIT NINE
    0x00001810, //1819    ; Decimal # Nd  [10] MONGOLIAN DIGIT ZERO..MONGOLIAN DIGIT NINE
    0x00001946, //194F    ; Decimal # Nd  [10] LIMBU DIGIT ZERO..LIMBU DIGIT NINE
    0x000019D0, //19D9    ; Decimal # Nd  [10] NEW TAI LUE DIGIT ZERO..NEW TAI LUE DIGIT NINE
    0x00001B50, //1B59    ; Decimal # Nd  [10] BALINESE DIGIT ZERO..BALINESE DIGIT NINE
    0x00001BB0, //1BB9    ; Decimal # Nd  [10] SUNDANESE DIGIT ZERO..SUNDANESE DIGIT NINE
    0x00001C40, //1C49    ; Decimal # Nd  [10] LEPCHA DIGIT ZERO..LEPCHA DIGIT NINE
    0x00001C50, //1C59    ; Decimal # Nd  [10] OL CHIKI DIGIT ZERO..OL CHIKI DIGIT NINE
    0x0000A620, //A629    ; Decimal # Nd  [10] VAI DIGIT ZERO..VAI DIGIT NINE
    0x0000A8D0, //A8D9    ; Decimal # Nd  [10] SAURASHTRA DIGIT ZERO..SAURASHTRA DIGIT NINE
    0x0000A900, //A909    ; Decimal # Nd  [10] KAYAH LI DIGIT ZERO..KAYAH LI DIGIT NINE
    0x0000AA50, //AA59    ; Decimal # Nd  [10] CHAM DIGIT ZERO..CHAM DIGIT NINE
    0x0000FF10, //FF19    ; Decimal # Nd  [10] FULLWIDTH DIGIT ZERO..FULLWIDTH DIGIT NINE
    0x000104A0, //104A9   ; Decimal # Nd  [10] OSMANYA DIGIT ZERO..OSMANYA DIGIT NINE
    0x0001D7CE  //1D7FF   ; Decimal # Nd  [50] MATHEMATICAL BOLD DIGIT ZERO..MATHEMATICAL MONOSPACE DIGIT NINE
};

bool HasDigits( std::u16string_view rText )
{
    const sal_Int32 nLen = rText.size();

    sal_Int32 i = 0;
    while (i < nLen) // for all characters ...
    {
        const sal_uInt32 nCodePoint = o3tl::iterateCodePoints( rText, &i );    // handle unicode surrogates correctly...
        for (unsigned int nDigitZero : the_aDigitZeroes)   // ... check in all 0..9 ranges
        {
            if (nDigitZero > nCodePoint)
                break;
            if (/*nDigitZero <= nCodePoint &&*/ nCodePoint <= nDigitZero + 9)
                return true;
        }
    }
    return false;
}

bool IsNumeric( std::u16string_view rText )
{
    bool bRes = false;
    if (!rText.empty())
    {
        sal_Int32 nLen = rText.size();
        bRes = true;
        for(sal_Int32 i = 0; i < nLen; ++i)
        {
            sal_Unicode cChar = rText[ i ];
            if ( '0' > cChar  ||  cChar > '9' )
            {
                bRes = false;
                break;
            }
        }
    }
    return bRes;
}

uno::Reference< XLinguProperties > GetLinguProperties()
{
    return LinguProperties::create( comphelper::getProcessComponentContext() );
}

uno::Reference< XSearchableDictionaryList > GetDictionaryList()
{
    uno::Reference< XComponentContext > xContext( comphelper::getProcessComponentContext() );
    uno::Reference< XSearchableDictionaryList > xRef;
    try
    {
        xRef = DictionaryList::create(xContext);
    }
    catch (const uno::Exception &)
    {
        SAL_WARN( "linguistic", "createInstance failed" );
    }

    return xRef;
}

uno::Reference< XDictionary > GetIgnoreAllList()
{
    uno::Reference< XDictionary > xRes;
    uno::Reference< XSearchableDictionaryList > xDL( GetDictionaryList() );
    if (xDL.is())
    {
        const LanguageTag tag = comphelper::LibreOfficeKit::isActive()
                                    ? LanguageTag("en-US")
                                    : SvtSysLocale().GetUILanguageTag();
        std::locale loc(Translate::Create("svt", tag));
        xRes = xDL->getDictionaryByName( Translate::get(STR_DESCRIPTION_IGNOREALLLIST, loc) );
    }
    return xRes;
}

AppExitListener::AppExitListener()
{
    // add object to Desktop EventListeners in order to properly call
    // the AtExit function at application exit.
    uno::Reference< XComponentContext > xContext( comphelper::getProcessComponentContext() );

    try
    {
        xDesktop = frame::Desktop::create(xContext);
    }
    catch (const uno::Exception &)
    {
        SAL_WARN( "linguistic", "createInstance failed" );
    }
}

AppExitListener::~AppExitListener()
{
}

void AppExitListener::Activate()
{
    if (xDesktop.is())
        xDesktop->addTerminateListener( this );
}

void AppExitListener::Deactivate()
{
    if (xDesktop.is())
        xDesktop->removeTerminateListener( this );
}

void SAL_CALL
    AppExitListener::disposing( const EventObject& rEvtSource )
{
    MutexGuard  aGuard( GetLinguMutex() );

    if (xDesktop.is()  &&  rEvtSource.Source == xDesktop)
    {
        xDesktop = nullptr;    //! release reference to desktop
    }
}

void SAL_CALL
    AppExitListener::queryTermination( const EventObject& /*rEvtSource*/ )
{
}

void SAL_CALL
    AppExitListener::notifyTermination( const EventObject& rEvtSource )
{
    MutexGuard  aGuard( GetLinguMutex() );

    if (xDesktop.is()  &&  rEvtSource.Source == xDesktop)
    {
        AtExit();
    }
}

}   // namespace linguistic

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