/* -*- 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 <scitems.hxx>
#include <comphelper/processfactory.hxx>
#include <editeng/eeitem.hxx>

#include <svx/algitem.hxx>
#include <svtools/colorcfg.hxx>
#include <editeng/editview.hxx>
#include <editeng/editstat.hxx>
#include <editeng/escapementitem.hxx>
#include <editeng/flditem.hxx>
#include <editeng/numitem.hxx>
#include <editeng/justifyitem.hxx>
#include <editeng/editobj.hxx>
#include <vcl/svapp.hxx>
#include <vcl/outdev.hxx>
#include <svl/inethist.hxx>
#include <unotools/syslocale.hxx>
#include <sfx2/objsh.hxx>
#include <osl/diagnose.h>

#include <com/sun/star/text/textfield/Type.hpp>
#include <com/sun/star/document/XDocumentProperties.hpp>

#include <editutil.hxx>
#include <global.hxx>
#include <attrib.hxx>
#include <document.hxx>
#include <docpool.hxx>
#include <patattr.hxx>
#include <scmod.hxx>
#include <inputopt.hxx>
#include <compiler.hxx>

using namespace com::sun::star;

//  delimiters additionally to EditEngine default:

ScEditUtil::ScEditUtil( ScDocument* pDocument, SCCOL nX, SCROW nY, SCTAB nZ,
                            const Point& rScrPosPixel,
                            OutputDevice* pDevice, double nScaleX, double nScaleY,
                            const Fraction& rX, const Fraction& rY ) :
                    pDoc(pDocument),nCol(nX),nRow(nY),nTab(nZ),
                    aScrPos(rScrPosPixel),pDev(pDevice),
                    nPPTX(nScaleX),nPPTY(nScaleY),aZoomX(rX),aZoomY(rY) {}

OUString ScEditUtil::ModifyDelimiters( const OUString& rOld )
{
    // underscore is used in function argument names
    OUString aRet = rOld.replaceAll("_", "") +
        "=()+-*/^&<>" +
        ScCompiler::GetNativeSymbol(ocSep); // argument separator is localized.
    return aRet;
}

static OUString lcl_GetDelimitedString( const EditEngine& rEngine, const char c )
{
    sal_Int32 nParCount = rEngine.GetParagraphCount();
    OUStringBuffer aRet( nParCount * 80 );
    for (sal_Int32 nPar=0; nPar<nParCount; nPar++)
    {
        if (nPar > 0)
            aRet.append(c);
        aRet.append( rEngine.GetText( nPar ));
    }
    return aRet.makeStringAndClear();
}

static OUString lcl_GetDelimitedString( const EditTextObject& rEdit, const char c )
{
    sal_Int32 nParCount = rEdit.GetParagraphCount();
    OUStringBuffer aRet( nParCount * 80 );
    for (sal_Int32 nPar=0; nPar<nParCount; nPar++)
    {
        if (nPar > 0)
            aRet.append(c);
        aRet.append( rEdit.GetText( nPar ));
    }
    return aRet.makeStringAndClear();
}

OUString ScEditUtil::GetSpaceDelimitedString( const EditEngine& rEngine )
{
    return lcl_GetDelimitedString(rEngine, ' ');
}
OUString ScEditUtil::GetMultilineString( const EditEngine& rEngine )
{
    return lcl_GetDelimitedString(rEngine, '\n');
}

OUString ScEditUtil::GetMultilineString( const EditTextObject& rEdit )
{
    return lcl_GetDelimitedString(rEdit, '\n');
}

OUString ScEditUtil::GetString( const EditTextObject& rEditText, const ScDocument* pDoc )
{
    if( !rEditText.HasField())
        return GetMultilineString( rEditText );

    static osl::Mutex aMutex;
    osl::MutexGuard aGuard( aMutex);
    // ScFieldEditEngine is needed to resolve field contents.
    if (pDoc)
    {
        /* TODO: make ScDocument::GetEditEngine() const? Most likely it's only
         * not const because of the pointer assignment, make that mutable, and
         * then remove the ugly const_cast here. */
        EditEngine& rEE = const_cast<ScDocument*>(pDoc)->GetEditEngine();
        rEE.SetText( rEditText);
        return GetMultilineString( rEE);
    }
    else
    {
        EditEngine& rEE = ScGlobal::GetStaticFieldEditEngine();
        rEE.SetText( rEditText);
        return GetMultilineString( rEE);
    }
}

std::unique_ptr<EditTextObject> ScEditUtil::CreateURLObjectFromURL( ScDocument& rDoc, const OUString& rURL, const OUString& rText )
{
    SvxURLField aUrlField( rURL, rText, SvxURLFormat::AppDefault);
    EditEngine& rEE = rDoc.GetEditEngine();
    rEE.SetText( EMPTY_OUSTRING );
    rEE.QuickInsertField( SvxFieldItem( aUrlField, EE_FEATURE_FIELD ),
            ESelection( EE_PARA_MAX_COUNT, EE_TEXTPOS_MAX_COUNT ) );

    return rEE.CreateTextObject();
}

void ScEditUtil::RemoveCharAttribs( EditTextObject& rEditText, const ScPatternAttr& rAttr )
{
    static const struct {
        sal_uInt16 nAttrType;
        sal_uInt16 nCharType;
    } AttrTypeMap[] = {
        { ATTR_FONT,        EE_CHAR_FONTINFO },
        { ATTR_FONT_HEIGHT, EE_CHAR_FONTHEIGHT },
        { ATTR_FONT_WEIGHT, EE_CHAR_WEIGHT },
        { ATTR_FONT_COLOR,  EE_CHAR_COLOR }
    };

    const SfxItemSet& rSet = rAttr.GetItemSet();
    const SfxPoolItem* pItem;
    for (size_t i = 0; i < SAL_N_ELEMENTS(AttrTypeMap); ++i)
    {
        if ( rSet.GetItemState(AttrTypeMap[i].nAttrType, false, &pItem) == SfxItemState::SET )
            rEditText.RemoveCharAttribs(AttrTypeMap[i].nCharType);
    }
}

std::unique_ptr<EditTextObject> ScEditUtil::Clone( const EditTextObject& rObj, ScDocument& rDestDoc )
{
    std::unique_ptr<EditTextObject> pNew;

    EditEngine& rEngine = rDestDoc.GetEditEngine();
    if (rObj.HasOnlineSpellErrors())
    {
        EEControlBits nControl = rEngine.GetControlWord();
        const EEControlBits nSpellControl = EEControlBits::ONLINESPELLING | EEControlBits::ALLOWBIGOBJS;
        bool bNewControl = ( (nControl & nSpellControl) != nSpellControl );
        if (bNewControl)
            rEngine.SetControlWord(nControl | nSpellControl);
        rEngine.SetText(rObj);
        pNew = rEngine.CreateTextObject();
        if (bNewControl)
            rEngine.SetControlWord(nControl);
    }
    else
    {
        rEngine.SetText(rObj);
        pNew = rEngine.CreateTextObject();
    }

    return pNew;
}

OUString ScEditUtil::GetCellFieldValue(
    const SvxFieldData& rFieldData, const ScDocument* pDoc, std::optional<Color>* ppTextColor )
{
    OUString aRet;
    switch (rFieldData.GetClassId())
    {
        case text::textfield::Type::URL:
        {
            const SvxURLField& rField = static_cast<const SvxURLField&>(rFieldData);
            const OUString& aURL = rField.GetURL();

            switch (rField.GetFormat())
            {
                case SvxURLFormat::AppDefault: //TODO: configurable with App???
                case SvxURLFormat::Repr:
                    aRet = rField.GetRepresentation();
                break;
                case SvxURLFormat::Url:
                    aRet = aURL;
                break;
                default:
                    ;
            }

            svtools::ColorConfigEntry eEntry =
                INetURLHistory::GetOrCreate()->QueryUrl(aURL) ? svtools::LINKSVISITED : svtools::LINKS;

            if (ppTextColor)
                *ppTextColor = SC_MOD()->GetColorConfig().GetColorValue(eEntry).nColor;
        }
        break;
        case text::textfield::Type::EXTENDED_TIME:
        {
            const SvxExtTimeField& rField = static_cast<const SvxExtTimeField&>(rFieldData);
            if (pDoc)
                aRet = rField.GetFormatted(*pDoc->GetFormatTable(), ScGlobal::eLnge);
            else
            {
                /* TODO: quite expensive, we could have a global formatter? */
                SvNumberFormatter aFormatter( comphelper::getProcessComponentContext(), ScGlobal::eLnge );
                aRet = rField.GetFormatted(aFormatter, ScGlobal::eLnge);
            }
        }
        break;
        case text::textfield::Type::DATE:
        {
            Date aDate(Date::SYSTEM);
            aRet = ScGlobal::getLocaleDataPtr()->getDate(aDate);
        }
        break;
        case text::textfield::Type::DOCINFO_TITLE:
        {
            if (pDoc)
            {
                SfxObjectShell* pDocShell = pDoc->GetDocumentShell();
                if (pDocShell)
                {
                    aRet = pDocShell->getDocProperties()->getTitle();
                    if (aRet.isEmpty())
                        aRet = pDocShell->GetTitle();
                }
            }
            if (aRet.isEmpty())
                aRet = "?";
        }
        break;
        case text::textfield::Type::TABLE:
        {
            const SvxTableField& rField = static_cast<const SvxTableField&>(rFieldData);
            SCTAB nTab = rField.GetTab();
            OUString aName;
            if (pDoc && pDoc->GetName(nTab, aName))
                aRet = aName;
            else
                aRet = "?";
        }
        break;
        default:
            aRet = "?";
    }

    if (aRet.isEmpty())        // empty is yuck
        aRet = " ";         // space is default of EditEngine

    return aRet;
}

tools::Rectangle ScEditUtil::GetEditArea( const ScPatternAttr* pPattern, bool bForceToTop )
{
    // bForceToTop = always align to top, for editing
    // (sal_False for querying URLs etc.)

    if (!pPattern)
        pPattern = pDoc->GetPattern( nCol, nRow, nTab );

    Point aStartPos = aScrPos;

    bool bLayoutRTL = pDoc->IsLayoutRTL( nTab );
    long nLayoutSign = bLayoutRTL ? -1 : 1;

    const ScMergeAttr* pMerge = &pPattern->GetItem(ATTR_MERGE);
    long nCellX = static_cast<long>( pDoc->GetColWidth(nCol,nTab) * nPPTX );
    if ( pMerge->GetColMerge() > 1 )
    {
        SCCOL nCountX = pMerge->GetColMerge();
        for (SCCOL i=1; i<nCountX; i++)
            nCellX += static_cast<long>( pDoc->GetColWidth(nCol+i,nTab) * nPPTX );
    }
    long nCellY = static_cast<long>( pDoc->GetRowHeight(nRow,nTab) * nPPTY );
    if ( pMerge->GetRowMerge() > 1 )
    {
        SCROW nCountY = pMerge->GetRowMerge();
        nCellY += static_cast<long>(pDoc->GetScaledRowHeight( nRow+1, nRow+nCountY-1, nTab, nPPTY));
    }

    const SvxMarginItem* pMargin = &pPattern->GetItem(ATTR_MARGIN);
    sal_uInt16 nIndent = 0;
    if ( pPattern->GetItem(ATTR_HOR_JUSTIFY).GetValue() ==
                SvxCellHorJustify::Left )
        nIndent = pPattern->GetItem(ATTR_INDENT).GetValue();
    long nPixDifX   = static_cast<long>( ( pMargin->GetLeftMargin() + nIndent ) * nPPTX );
    aStartPos.AdjustX(nPixDifX * nLayoutSign );
    nCellX          -= nPixDifX + static_cast<long>( pMargin->GetRightMargin() * nPPTX );     // due to line feed, etc.

    //  align vertical position to the one in the table

    long nPixDifY;
    long nTopMargin = static_cast<long>( pMargin->GetTopMargin() * nPPTY );
    SvxCellVerJustify eJust = pPattern->GetItem(ATTR_VER_JUSTIFY).GetValue();

    //  asian vertical is always edited top-aligned
    bool bAsianVertical = pPattern->GetItem( ATTR_STACKED ).GetValue() &&
        pPattern->GetItem( ATTR_VERTICAL_ASIAN ).GetValue();

    if ( eJust == SvxCellVerJustify::Top ||
            ( bForceToTop && ( SC_MOD()->GetInputOptions().GetTextWysiwyg() || bAsianVertical ) ) )
        nPixDifY = nTopMargin;
    else
    {
        MapMode aMode = pDev->GetMapMode();
        pDev->SetMapMode(MapMode(MapUnit::MapPixel));

        long nTextHeight = pDoc->GetNeededSize( nCol, nRow, nTab,
                                                pDev, nPPTX, nPPTY, aZoomX, aZoomY, false );
        if (!nTextHeight)
        {                                   // empty cell
            vcl::Font aFont;
            // font color doesn't matter here
            pPattern->GetFont( aFont, SC_AUTOCOL_BLACK, pDev, &aZoomY );
            pDev->SetFont(aFont);
            nTextHeight = pDev->GetTextHeight() + nTopMargin +
                            static_cast<long>( pMargin->GetBottomMargin() * nPPTY );
        }

        pDev->SetMapMode(aMode);

        if ( nTextHeight > nCellY + nTopMargin || bForceToTop )
            nPixDifY = 0;                           // too large -> begin at the top
        else
        {
            if ( eJust == SvxCellVerJustify::Center )
                nPixDifY = nTopMargin + ( nCellY - nTextHeight ) / 2;
            else
                nPixDifY = nCellY - nTextHeight + nTopMargin;       // JUSTIFY_BOTTOM
        }
    }

    aStartPos.AdjustY(nPixDifY );
    nCellY      -= nPixDifY;

    if ( bLayoutRTL )
        aStartPos.AdjustX( -(nCellX - 2) );    // excluding grid on both sides

                                                        //  -1 -> don't overwrite grid
    return tools::Rectangle( aStartPos, Size(nCellX-1,nCellY-1) );
}

ScEditAttrTester::ScEditAttrTester( ScEditEngineDefaulter* pEngine ) :
    bNeedsObject( false ),
    bNeedsCellAttr( false )
{
    if ( pEngine->GetParagraphCount() > 1 )
    {
        bNeedsObject = true;            //TODO: find cell attributes ?
    }
    else
    {
        const SfxPoolItem* pItem = nullptr;
        pEditAttrs.reset( new SfxItemSet( pEngine->GetAttribs(
                                        ESelection(0,0,0,pEngine->GetTextLen(0)), EditEngineAttribs::OnlyHard ) ) );
        const SfxItemSet& rEditDefaults = pEngine->GetDefaults();

        for (sal_uInt16 nId = EE_CHAR_START; nId <= EE_CHAR_END && !bNeedsObject; nId++)
        {
            SfxItemState eState = pEditAttrs->GetItemState( nId, false, &pItem );
            if (eState == SfxItemState::DONTCARE)
                bNeedsObject = true;
            else if (eState == SfxItemState::SET)
            {
                if ( nId == EE_CHAR_ESCAPEMENT || nId == EE_CHAR_PAIRKERNING ||
                        nId == EE_CHAR_KERNING || nId == EE_CHAR_XMLATTRIBS )
                {
                    //  Escapement and kerning are kept in EditEngine because there are no
                    //  corresponding cell format items. User defined attributes are kept in
                    //  EditEngine because "user attributes applied to all the text" is different
                    //  from "user attributes applied to the cell".

                    if ( *pItem != rEditDefaults.Get(nId) )
                        bNeedsObject = true;
                }
                else
                    if (!bNeedsCellAttr)
                        if ( *pItem != rEditDefaults.Get(nId) )
                            bNeedsCellAttr = true;
                //  rEditDefaults contains the defaults from the cell format
            }
        }

        //  contains field commands?

        SfxItemState eFieldState = pEditAttrs->GetItemState( EE_FEATURE_FIELD, false );
        if ( eFieldState == SfxItemState::DONTCARE || eFieldState == SfxItemState::SET )
            bNeedsObject = true;

        //  not converted characters?

        SfxItemState eConvState = pEditAttrs->GetItemState( EE_FEATURE_NOTCONV, false );
        if ( eConvState == SfxItemState::DONTCARE || eConvState == SfxItemState::SET )
            bNeedsObject = true;
    }
}

ScEditAttrTester::~ScEditAttrTester()
{
}

ScEnginePoolHelper::ScEnginePoolHelper( SfxItemPool* pEnginePoolP,
                bool bDeleteEnginePoolP )
            :
            pEnginePool( pEnginePoolP ),
            pDefaults( nullptr ),
            bDeleteEnginePool( bDeleteEnginePoolP ),
            bDeleteDefaults( false )
{
}

ScEnginePoolHelper::ScEnginePoolHelper( const ScEnginePoolHelper& rOrg )
            :
            pEnginePool( rOrg.bDeleteEnginePool ? rOrg.pEnginePool->Clone() : rOrg.pEnginePool ),
            pDefaults( nullptr ),
            bDeleteEnginePool( rOrg.bDeleteEnginePool ),
            bDeleteDefaults( false )
{
}

ScEnginePoolHelper::~ScEnginePoolHelper()
{
    if ( bDeleteDefaults )
        delete pDefaults;
    if ( bDeleteEnginePool )
        SfxItemPool::Free(pEnginePool);
}

ScEditEngineDefaulter::ScEditEngineDefaulter( SfxItemPool* pEnginePoolP,
                bool bDeleteEnginePoolP )
            :
            ScEnginePoolHelper( pEnginePoolP, bDeleteEnginePoolP ),
            EditEngine( pEnginePoolP )
{
    //  All EditEngines use ScGlobal::GetEditDefaultLanguage as DefaultLanguage.
    //  DefaultLanguage for InputHandler's EditEngine is updated later.

    SetDefaultLanguage( ScGlobal::GetEditDefaultLanguage() );
}

ScEditEngineDefaulter::ScEditEngineDefaulter( const ScEditEngineDefaulter& rOrg )
            :
            ScEnginePoolHelper( rOrg ),
            EditEngine( pEnginePool )
{
    SetDefaultLanguage( ScGlobal::GetEditDefaultLanguage() );
}

ScEditEngineDefaulter::~ScEditEngineDefaulter()
{
}

void ScEditEngineDefaulter::SetDefaults( const SfxItemSet& rSet, bool bRememberCopy )
{
    if ( bRememberCopy )
    {
        if ( bDeleteDefaults )
            delete pDefaults;
        pDefaults = new SfxItemSet( rSet );
        bDeleteDefaults = true;
    }
    const SfxItemSet& rNewSet = bRememberCopy ? *pDefaults : rSet;
    bool bUndo = IsUndoEnabled();
    EnableUndo( false );
    bool bUpdateMode = GetUpdateMode();
    if ( bUpdateMode )
        SetUpdateMode( false );
    sal_Int32 nPara = GetParagraphCount();
    for ( sal_Int32 j=0; j<nPara; j++ )
    {
        SetParaAttribs( j, rNewSet );
    }
    if ( bUpdateMode )
        SetUpdateMode( true );
    if ( bUndo )
        EnableUndo( true );
}

void ScEditEngineDefaulter::SetDefaults( std::unique_ptr<SfxItemSet> pSet )
{
    if ( bDeleteDefaults )
        delete pDefaults;
    pDefaults = pSet.release();
    bDeleteDefaults = true;
    if ( pDefaults )
        SetDefaults( *pDefaults, false );
}

void ScEditEngineDefaulter::SetDefaultItem( const SfxPoolItem& rItem )
{
    if ( !pDefaults )
    {
        pDefaults = new SfxItemSet( GetEmptyItemSet() );
        bDeleteDefaults = true;
    }
    pDefaults->Put( rItem );
    SetDefaults( *pDefaults, false );
}

const SfxItemSet& ScEditEngineDefaulter::GetDefaults()
{
    if ( !pDefaults )
    {
        pDefaults = new SfxItemSet( GetEmptyItemSet() );
        bDeleteDefaults = true;
    }
    return *pDefaults;
}

void ScEditEngineDefaulter::SetTextCurrentDefaults( const EditTextObject& rTextObject )
{
    bool bUpdateMode = GetUpdateMode();
    if ( bUpdateMode )
        SetUpdateMode( false );
    SetText( rTextObject );
    if ( pDefaults )
        SetDefaults( *pDefaults, false );
    if ( bUpdateMode )
        SetUpdateMode( true );
}

void ScEditEngineDefaulter::SetTextNewDefaults( const EditTextObject& rTextObject,
            const SfxItemSet& rSet, bool bRememberCopy )
{
    bool bUpdateMode = GetUpdateMode();
    if ( bUpdateMode )
        SetUpdateMode( false );
    SetText( rTextObject );
    SetDefaults( rSet, bRememberCopy );
    if ( bUpdateMode )
        SetUpdateMode( true );
}

void ScEditEngineDefaulter::SetTextNewDefaults( const EditTextObject& rTextObject,
            std::unique_ptr<SfxItemSet> pSet )
{
    bool bUpdateMode = GetUpdateMode();
    if ( bUpdateMode )
        SetUpdateMode( false );
    SetText( rTextObject );
    SetDefaults( std::move(pSet) );
    if ( bUpdateMode )
        SetUpdateMode( true );
}

void ScEditEngineDefaulter::SetTextCurrentDefaults( const OUString& rText )
{
    bool bUpdateMode = GetUpdateMode();
    if ( bUpdateMode )
        SetUpdateMode( false );
    SetText( rText );
    if ( pDefaults )
        SetDefaults( *pDefaults, false );
    if ( bUpdateMode )
        SetUpdateMode( true );
}

void ScEditEngineDefaulter::SetTextNewDefaults( const OUString& rText,
            const SfxItemSet& rSet )
{
    bool bUpdateMode = GetUpdateMode();
    if ( bUpdateMode )
        SetUpdateMode( false );
    SetText( rText );
    SetDefaults( rSet );
    if ( bUpdateMode )
        SetUpdateMode( true );
}

void ScEditEngineDefaulter::SetTextNewDefaults( const OUString& rText,
            std::unique_ptr<SfxItemSet> pSet )
{
    bool bUpdateMode = GetUpdateMode();
    if ( bUpdateMode )
        SetUpdateMode( false );
    SetText( rText );
    SetDefaults( std::move(pSet) );
    if ( bUpdateMode )
        SetUpdateMode( true );
}

void ScEditEngineDefaulter::RepeatDefaults()
{
    if ( pDefaults )
    {
        sal_Int32 nPara = GetParagraphCount();
        for ( sal_Int32 j=0; j<nPara; j++ )
            SetParaAttribs( j, *pDefaults );
    }
}

void ScEditEngineDefaulter::RemoveParaAttribs()
{
    std::unique_ptr<SfxItemSet> pCharItems;
    bool bUpdateMode = GetUpdateMode();
    if ( bUpdateMode )
        SetUpdateMode( false );
    sal_Int32 nParCount = GetParagraphCount();
    for (sal_Int32 nPar=0; nPar<nParCount; nPar++)
    {
        const SfxItemSet& rParaAttribs = GetParaAttribs( nPar );
        sal_uInt16 nWhich;
        for (nWhich = EE_CHAR_START; nWhich <= EE_CHAR_END; nWhich ++)
        {
            const SfxPoolItem* pParaItem;
            if ( rParaAttribs.GetItemState( nWhich, false, &pParaItem ) == SfxItemState::SET )
            {
                //  if defaults are set, use only items that are different from default
                if ( !pDefaults || *pParaItem != pDefaults->Get(nWhich) )
                {
                    if (!pCharItems)
                        pCharItems.reset(new SfxItemSet( GetEmptyItemSet() ));
                    pCharItems->Put( *pParaItem );
                }
            }
        }

        if ( pCharItems )
        {
            std::vector<sal_Int32> aPortions;
            GetPortions( nPar, aPortions );

            //  loop through the portions of the paragraph, and set only those items
            //  that are not overridden by existing character attributes

            sal_Int32 nStart = 0;
            for ( const sal_Int32 nEnd : aPortions )
            {
                ESelection aSel( nPar, nStart, nPar, nEnd );
                SfxItemSet aOldCharAttrs = GetAttribs( aSel );
                SfxItemSet aNewCharAttrs = *pCharItems;
                for (nWhich = EE_CHAR_START; nWhich <= EE_CHAR_END; nWhich ++)
                {
                    //  Clear those items that are different from existing character attributes.
                    //  Where no character attributes are set, GetAttribs returns the paragraph attributes.
                    const SfxPoolItem* pItem;
                    if ( aNewCharAttrs.GetItemState( nWhich, false, &pItem ) == SfxItemState::SET &&
                         *pItem != aOldCharAttrs.Get(nWhich) )
                    {
                        aNewCharAttrs.ClearItem(nWhich);
                    }
                }
                if ( aNewCharAttrs.Count() )
                    QuickSetAttribs( aNewCharAttrs, aSel );

                nStart = nEnd;
            }

            pCharItems.reset();
        }

        if ( rParaAttribs.Count() )
        {
            //  clear all paragraph attributes (including defaults),
            //  so they are not contained in resulting EditTextObjects

            SetParaAttribs( nPar, SfxItemSet( *rParaAttribs.GetPool(), rParaAttribs.GetRanges() ) );
        }
    }
    if ( bUpdateMode )
        SetUpdateMode( true );
}

ScTabEditEngine::ScTabEditEngine( ScDocument* pDoc )
        : ScFieldEditEngine( pDoc, pDoc->GetEnginePool() )
{
    SetEditTextObjectPool( pDoc->GetEditPool() );
    Init(pDoc->GetPool()->GetDefaultItem(ATTR_PATTERN));
}

ScTabEditEngine::ScTabEditEngine( const ScPatternAttr& rPattern,
            SfxItemPool* pEngineItemPool, ScDocument* pDoc, SfxItemPool* pTextObjectPool )
        : ScFieldEditEngine( pDoc, pEngineItemPool, pTextObjectPool )
{
    if ( pTextObjectPool )
        SetEditTextObjectPool( pTextObjectPool );
    Init( rPattern );
}

void ScTabEditEngine::Init( const ScPatternAttr& rPattern )
{
    SetRefMapMode(MapMode(MapUnit::Map100thMM));
    auto pEditDefaults = std::make_unique<SfxItemSet>( GetEmptyItemSet() );
    rPattern.FillEditItemSet( pEditDefaults.get() );
    SetDefaults( std::move(pEditDefaults) );
    // we have no StyleSheets for text
    SetControlWord( GetControlWord() & ~EEControlBits::RTFSTYLESHEETS );
}

//      field commands for header and footer

//      numbers from \sw\source\core\doc\numbers.cxx

static OUString lcl_GetCharStr( sal_Int32 nNo )
{
    OSL_ENSURE( nNo, "0 is an invalid number !!" );
    OUString aStr;

    const sal_Int32 coDiff = 'Z' - 'A' +1;
    sal_Int32 nCalc;

    do {
        nCalc = nNo % coDiff;
        if( !nCalc )
            nCalc = coDiff;
        aStr = OUStringChar( sal_Unicode('a' - 1 + nCalc) ) + aStr;
        nNo = sal::static_int_cast<sal_Int32>( nNo - nCalc );
        if( nNo )
            nNo /= coDiff;
    } while( nNo );
    return aStr;
}

static OUString lcl_GetNumStr(sal_Int32 nNo, SvxNumType eType)
{
    OUString aTmpStr('0');
    if( nNo )
    {
        switch( eType )
        {
        case css::style::NumberingType::CHARS_UPPER_LETTER:
        case css::style::NumberingType::CHARS_LOWER_LETTER:
            aTmpStr = lcl_GetCharStr( nNo );
            break;

        case css::style::NumberingType::ROMAN_UPPER:
        case css::style::NumberingType::ROMAN_LOWER:
            if( nNo < 4000 )
                aTmpStr = SvxNumberFormat::CreateRomanString( nNo, ( eType == css::style::NumberingType::ROMAN_UPPER ) );
            else
                aTmpStr.clear();
            break;

        case css::style::NumberingType::NUMBER_NONE:
            aTmpStr.clear();
            break;

//      CHAR_SPECIAL:
//          ????

//      case ARABIC:    is default now
        default:
            aTmpStr = OUString::number(nNo);
            break;
        }

        if( css::style::NumberingType::CHARS_UPPER_LETTER == eType )
            aTmpStr = aTmpStr.toAsciiUpperCase();
    }
    return aTmpStr;
}

ScHeaderFieldData::ScHeaderFieldData()
    : aDateTime ( DateTime::EMPTY )
{
    nPageNo = nTotalPages = 0;
    eNumType = SVX_NUM_ARABIC;
}

ScHeaderEditEngine::ScHeaderEditEngine( SfxItemPool* pEnginePoolP )
        : ScEditEngineDefaulter( pEnginePoolP,true/*bDeleteEnginePoolP*/ )
{
}

OUString ScHeaderEditEngine::CalcFieldValue( const SvxFieldItem& rField,
                                    sal_Int32 /* nPara */, sal_Int32 /* nPos */,
                                    std::optional<Color>& /* rTxtColor */, std::optional<Color>& /* rFldColor */ )
{
    const SvxFieldData* pFieldData = rField.GetField();
    if (!pFieldData)
        return "?";

    OUString aRet;
    sal_Int32 nClsId = pFieldData->GetClassId();
    switch (nClsId)
    {
        case text::textfield::Type::PAGE:
            aRet = lcl_GetNumStr( aData.nPageNo,aData.eNumType );
        break;
        case text::textfield::Type::PAGES:
            aRet = lcl_GetNumStr( aData.nTotalPages,aData.eNumType );
        break;
        case text::textfield::Type::EXTENDED_TIME:
        case text::textfield::Type::TIME:
            // For now, time field in the header / footer is always dynamic.
            aRet = ScGlobal::getLocaleDataPtr()->getTime(aData.aDateTime);
        break;
        case text::textfield::Type::DOCINFO_TITLE:
            aRet = aData.aTitle;
        break;
        case text::textfield::Type::EXTENDED_FILE:
        {
            switch (static_cast<const SvxExtFileField*>(pFieldData)->GetFormat())
            {
                case SvxFileFormat::PathFull :
                    aRet = aData.aLongDocName;
                break;
                default:
                    aRet = aData.aShortDocName;
            }
        }
        break;
        case text::textfield::Type::TABLE:
            aRet = aData.aTabName;
        break;
        case text::textfield::Type::DATE:
            aRet = ScGlobal::getLocaleDataPtr()->getDate(aData.aDateTime);
        break;
        default:
            aRet = "?";
    }

    return aRet;
}

//                          field data

ScFieldEditEngine::ScFieldEditEngine(
    ScDocument* pDoc, SfxItemPool* pEnginePoolP,
    SfxItemPool* pTextObjectPool, bool bDeleteEnginePoolP) :
        ScEditEngineDefaulter( pEnginePoolP, bDeleteEnginePoolP ),
        mpDoc(pDoc), bExecuteURL(true)
{
    if ( pTextObjectPool )
        SetEditTextObjectPool( pTextObjectPool );
    SetControlWord( EEControlBits(GetControlWord() | EEControlBits::MARKFIELDS) & ~EEControlBits::RTFSTYLESHEETS );
}

OUString ScFieldEditEngine::CalcFieldValue( const SvxFieldItem& rField,
                                    sal_Int32 /* nPara */, sal_Int32 /* nPos */,
                                    std::optional<Color>& rTxtColor, std::optional<Color>& /* rFldColor */ )
{
    const SvxFieldData* pFieldData = rField.GetField();

    if (!pFieldData)
        return " ";

    return ScEditUtil::GetCellFieldValue(*pFieldData, mpDoc, &rTxtColor);
}

void ScFieldEditEngine::FieldClicked( const SvxFieldItem& rField )
{
    if (!bExecuteURL)
        return;
    if (const SvxURLField* pURLField = dynamic_cast<const SvxURLField*>(rField.GetField()))
    {
        ScGlobal::OpenURL(pURLField->GetURL(), pURLField->GetTargetFrame());
    }
}

ScNoteEditEngine::ScNoteEditEngine( SfxItemPool* pEnginePoolP,
            SfxItemPool* pTextObjectPool ) :
    ScEditEngineDefaulter( pEnginePoolP, false/*bDeleteEnginePoolP*/ )
{
    if ( pTextObjectPool )
        SetEditTextObjectPool( pTextObjectPool );
    SetControlWord( EEControlBits(GetControlWord() | EEControlBits::MARKFIELDS) & ~EEControlBits::RTFSTYLESHEETS );
}

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