/* -*- 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 <rangelst.hxx>

#include <sfx2/bindings.hxx>

#include <svl/numformat.hxx>

#include <utility>

#include <vcl/commandinfoprovider.hxx>

#include <vcl/weld/Dialog.hxx>

#include <vcl/weld/MessageDialog.hxx>

#include <vcl/svapp.hxx>

#include <reffact.hxx>

#include <docsh.hxx>

#include <docfunc.hxx>

#include <rangeutl.hxx>

#include <convuno.hxx>

#include <unonames.hxx>

#include <solveroptions.hxx>

#include <solverutil.hxx>

#include <globstr.hrc>

#include <scresid.hxx>

#include <comphelper/sequence.hxx>

#include <optsolver.hxx>

#include <table.hxx>

#include <TableFillingAndNavigationTools.hxx>

#include <tabvwsh.hxx>

#include <com/sun/star/beans/XPropertySetInfo.hpp>

#include <com/sun/star/sheet/SolverConstraint.hpp>

#include <com/sun/star/sheet/SolverConstraintOperator.hpp>

#include <com/sun/star/sheet/XSolverDescription.hpp>

#include <com/sun/star/sheet/XSolver.hpp>

#include <com/sun/star/sheet/SensitivityReport.hpp>

using namespace com::sun::star;

ScSolverProgressDialog::ScSolverProgressDialog(weld::Window* pParent)

    : GenericDialogController(pParent, u"modules/scalc/ui/solverprogressdialog.ui"_ustr,

                              u"SolverProgressDialog"_ustr)

    , m_xFtTime(m_xBuilder->weld_label(u"progress"_ustr))

{

}

ScSolverProgressDialog::~ScSolverProgressDialog()

{

}

void ScSolverProgressDialog::HideTimeLimit()

{

    m_xFtTime->hide();

}

void ScSolverProgressDialog::SetTimeLimit( sal_Int32 nSeconds )

{

    OUString aOld = m_xFtTime->get_label();

    OUString aNew = aOld.replaceFirst("#", OUString::number(nSeconds));

    m_xFtTime->set_label(aNew);

}

ScSolverNoSolutionDialog::ScSolverNoSolutionDialog(weld::Window* pParent, const OUString& rErrorText)

    : GenericDialogController(pParent, u"modules/scalc/ui/nosolutiondialog.ui"_ustr, u"NoSolutionDialog"_ustr)

    , m_xFtErrorText(m_xBuilder->weld_label(u"error"_ustr))

{

    m_xFtErrorText->set_label(rErrorText);

}

ScSolverNoSolutionDialog::~ScSolverNoSolutionDialog()

{

}

ScSolverSuccessDialog::ScSolverSuccessDialog(weld::Window* pParent, std::u16string_view rSolution)

    : GenericDialogController(pParent, u"modules/scalc/ui/solversuccessdialog.ui"_ustr, u"SolverSuccessDialog"_ustr)

    , m_xFtResult(m_xBuilder->weld_label(u"result"_ustr))

    , m_xBtnOk(m_xBuilder->weld_button(u"ok"_ustr))

    , m_xBtnCancel(m_xBuilder->weld_button(u"cancel"_ustr))

{

    m_xBtnOk->connect_clicked(LINK(this, ScSolverSuccessDialog, ClickHdl));

    m_xBtnCancel->connect_clicked(LINK(this, ScSolverSuccessDialog, ClickHdl));

    OUString aMessage = m_xFtResult->get_label() + " " + rSolution;

    m_xFtResult->set_label(aMessage);

}

ScSolverSuccessDialog::~ScSolverSuccessDialog()

{

}

IMPL_LINK(ScSolverSuccessDialog, ClickHdl, weld::Button&, rBtn, void)

{

    if (&rBtn == m_xBtnOk.get())

        m_xDialog->response(RET_OK);

    else

        m_xDialog->response(RET_CANCEL);

}

ScCursorRefEdit::ScCursorRefEdit(std::unique_ptr<weld::Entry> xControl)

    : formula::RefEdit(std::move(xControl))

{

    mxEntry->connect_key_press(Link<const KeyEvent&, bool>()); //acknowledge we first remove the old one

    mxEntry->connect_key_press(LINK(this, ScCursorRefEdit, KeyInputHdl));

}

void ScCursorRefEdit::SetCursorLinks( const Link<ScCursorRefEdit&,void>& rUp, const Link<ScCursorRefEdit&,void>& rDown )

{

    maCursorUpLink = rUp;

    maCursorDownLink = rDown;

}

IMPL_LINK(ScCursorRefEdit, KeyInputHdl, const KeyEvent&, rKEvt, bool)

{

    vcl::KeyCode aCode = rKEvt.GetKeyCode();

    bool bUp = (aCode.GetCode() == KEY_UP);

    bool bDown = (aCode.GetCode() == KEY_DOWN);

    if ( !aCode.IsShift() && !aCode.IsMod1() && !aCode.IsMod2() && ( bUp || bDown ) )

    {

        if ( bUp )

            maCursorUpLink.Call( *this );

        else

            maCursorDownLink.Call( *this );

        return true;

    }

    return formula::RefEdit::KeyInput(rKEvt);

}

ScOptSolverDlg::ScOptSolverDlg(SfxBindings* pB, SfxChildWindow* pCW, weld::Window* pParent,

                               ScDocShell* pDocSh, const ScAddress& aCursorPos)

    : ScAnyRefDlgController(pB, pCW, pParent, u"modules/scalc/ui/solverdlg.ui"_ustr, u"SolverDialog"_ustr)

    , maInputError(ScResId(STR_INVALIDINPUT))

    , maConditionError(ScResId(STR_INVALIDCONDITION))

    , mpDocShell(pDocSh)

    , mrDoc(pDocSh->GetDocument())

    , mnCurTab(aCursorPos.Tab())

    , mbDlgLostFocus(false)

    , nScrollPos(0)

    , mpEdActive(nullptr)

    , m_xFtObjectiveCell(m_xBuilder->weld_label(u"targetlabel"_ustr))

    , m_xEdObjectiveCell(new formula::RefEdit(m_xBuilder->weld_entry(u"targetedit"_ustr)))

    , m_xRBObjectiveCell(new formula::RefButton(m_xBuilder->weld_button(u"targetbutton"_ustr)))

    , m_xRbMax(m_xBuilder->weld_radio_button(u"max"_ustr))

    , m_xRbMin(m_xBuilder->weld_radio_button(u"min"_ustr))

    , m_xRbValue(m_xBuilder->weld_radio_button(u"value"_ustr))

    , m_xEdTargetValue(new formula::RefEdit(m_xBuilder->weld_entry(u"valueedit"_ustr)))

    , m_xRBTargetValue(new formula::RefButton(m_xBuilder->weld_button(u"valuebutton"_ustr)))

    , m_xFtVariableCells(m_xBuilder->weld_label(u"changelabel"_ustr))

    , m_xEdVariableCells(new formula::RefEdit(m_xBuilder->weld_entry(u"changeedit"_ustr)))

    , m_xRBVariableCells(new formula::RefButton(m_xBuilder->weld_button(u"changebutton"_ustr)))

    , m_xFtCellRef(m_xBuilder->weld_label(u"cellreflabel"_ustr))

    , m_xEdLeft1(new ScCursorRefEdit(m_xBuilder->weld_entry(u"ref1edit"_ustr)))

    , m_xRBLeft1(new formula::RefButton(m_xBuilder->weld_button(u"ref1button"_ustr)))

    , m_xLbOp1(m_xBuilder->weld_combo_box(u"op1list"_ustr))

    , m_xFtConstraint(m_xBuilder->weld_label(u"constraintlabel"_ustr))

    , m_xEdRight1(new ScCursorRefEdit(m_xBuilder->weld_entry(u"val1edit"_ustr)))

    , m_xRBRight1(new formula::RefButton(m_xBuilder->weld_button(u"val1button"_ustr)))

    , m_xBtnDel1(m_xBuilder->weld_button(u"del1"_ustr))

    , m_xEdLeft2(new ScCursorRefEdit(m_xBuilder->weld_entry(u"ref2edit"_ustr)))

    , m_xRBLeft2(new formula::RefButton(m_xBuilder->weld_button(u"ref2button"_ustr)))

    , m_xLbOp2(m_xBuilder->weld_combo_box(u"op2list"_ustr))

    , m_xEdRight2(new ScCursorRefEdit(m_xBuilder->weld_entry(u"val2edit"_ustr)))

    , m_xRBRight2(new formula::RefButton(m_xBuilder->weld_button(u"val2button"_ustr)))

    , m_xBtnDel2(m_xBuilder->weld_button(u"del2"_ustr))

    , m_xEdLeft3(new ScCursorRefEdit(m_xBuilder->weld_entry(u"ref3edit"_ustr)))

    , m_xRBLeft3(new formula::RefButton(m_xBuilder->weld_button(u"ref3button"_ustr)))

    , m_xLbOp3(m_xBuilder->weld_combo_box(u"op3list"_ustr))

    , m_xEdRight3(new ScCursorRefEdit(m_xBuilder->weld_entry(u"val3edit"_ustr)))

    , m_xRBRight3(new formula::RefButton(m_xBuilder->weld_button(u"val3button"_ustr)))

    , m_xBtnDel3(m_xBuilder->weld_button(u"del3"_ustr))

    , m_xEdLeft4(new ScCursorRefEdit(m_xBuilder->weld_entry(u"ref4edit"_ustr)))

    , m_xRBLeft4(new formula::RefButton(m_xBuilder->weld_button(u"ref4button"_ustr)))

    , m_xLbOp4(m_xBuilder->weld_combo_box(u"op4list"_ustr))

    , m_xEdRight4(new ScCursorRefEdit(m_xBuilder->weld_entry(u"val4edit"_ustr)))

    , m_xRBRight4(new formula::RefButton(m_xBuilder->weld_button(u"val4button"_ustr)))

    , m_xBtnDel4(m_xBuilder->weld_button(u"del4"_ustr))

    , m_xScrollBar(m_xBuilder->weld_scrolled_window(u"scrollbar"_ustr, true))

    , m_xBtnOpt(m_xBuilder->weld_button(u"options"_ustr))

    , m_xBtnClose(m_xBuilder->weld_button(u"close"_ustr))

    , m_xBtnSolve(m_xBuilder->weld_button(u"ok"_ustr))

    , m_xBtnResetAll(m_xBuilder->weld_button(u"resetall"_ustr))

    , m_xResultFT(m_xBuilder->weld_label(u"result"_ustr))

    , m_xContents(m_xBuilder->weld_widget(u"grid"_ustr))

    , m_pSolverSettings(mrDoc.FetchTable(mnCurTab)->GetSolverSettings())

{

    m_xEdObjectiveCell->SetReferences(this, m_xFtObjectiveCell.get());

    m_xRBObjectiveCell->SetReferences(this, m_xEdObjectiveCell.get());

    m_xEdTargetValue->SetReferences(this, m_xResultFT.get());

    m_xRBTargetValue->SetReferences(this, m_xEdTargetValue.get());

    m_xEdVariableCells->SetReferences(this, m_xFtVariableCells.get());

    m_xRBVariableCells->SetReferences(this, m_xEdVariableCells.get());

    m_xEdLeft1->SetReferences(this, m_xFtCellRef.get());

    m_xRBLeft1->SetReferences(this, m_xEdLeft1.get());

    m_xEdRight1->SetReferences(this, m_xFtConstraint.get());

    m_xRBRight1->SetReferences(this, m_xEdRight1.get());

    m_xEdLeft2->SetReferences(this, m_xFtCellRef.get());

    m_xRBLeft2->SetReferences(this, m_xEdLeft2.get());

    m_xEdRight2->SetReferences(this, m_xFtConstraint.get());

    m_xRBRight2->SetReferences(this, m_xEdRight2.get());

    m_xEdLeft3->SetReferences(this, m_xFtCellRef.get());

    m_xRBLeft3->SetReferences(this, m_xEdLeft3.get());

    m_xEdRight3->SetReferences(this, m_xFtConstraint.get());

    m_xRBRight3->SetReferences(this, m_xEdRight3.get());

    m_xEdLeft4->SetReferences(this, m_xFtCellRef.get());

    m_xRBLeft4->SetReferences(this, m_xEdLeft4.get());

    m_xEdRight4->SetReferences(this, m_xFtConstraint.get());

    m_xRBRight4->SetReferences(this, m_xEdRight4.get());

    mpLeftEdit[0]    = m_xEdLeft1.get();

    mpLeftButton[0]  = m_xRBLeft1.get();

    mpRightEdit[0]   = m_xEdRight1.get();

    mpRightButton[0] = m_xRBRight1.get();

    mpOperator[0]    = m_xLbOp1.get();

    mpDelButton[0]   = m_xBtnDel1.get();

    mpLeftEdit[1]    = m_xEdLeft2.get();

    mpLeftButton[1]  = m_xRBLeft2.get();

    mpRightEdit[1]   = m_xEdRight2.get();

    mpRightButton[1] = m_xRBRight2.get();

    mpOperator[1]    = m_xLbOp2.get();

    mpDelButton[1]   = m_xBtnDel2.get();

    mpLeftEdit[2]    = m_xEdLeft3.get();

    mpLeftButton[2]  = m_xRBLeft3.get();

    mpRightEdit[2]   = m_xEdRight3.get();

    mpRightButton[2] = m_xRBRight3.get();

    mpOperator[2]    = m_xLbOp3.get();

    mpDelButton[2]   = m_xBtnDel3.get();

    mpLeftEdit[3]    = m_xEdLeft4.get();

    mpLeftButton[3]  = m_xRBLeft4.get();

    mpRightEdit[3]   = m_xEdRight4.get();

    mpRightButton[3] = m_xRBRight4.get();

    mpOperator[3]    = m_xLbOp4.get();

    mpDelButton[3]   = m_xBtnDel4.get();

    Init( aCursorPos );

}

ScOptSolverDlg::~ScOptSolverDlg()

{

}

void ScOptSolverDlg::Init(const ScAddress& rCursorPos)

{

    uno::Reference<frame::XFrame> xFrame = GetBindings().GetActiveFrame();

    auto xDelNm = vcl::CommandInfoProvider::GetXGraphicForCommand(u".uno:DeleteRows"_ustr, xFrame);

    for (weld::Button* pButton : mpDelButton)

        pButton->set_image(xDelNm);

    m_xBtnOpt->connect_clicked( LINK( this, ScOptSolverDlg, BtnHdl ) );

    m_xBtnClose->connect_clicked( LINK( this, ScOptSolverDlg, BtnHdl ) );

    m_xBtnSolve->connect_clicked( LINK( this, ScOptSolverDlg, BtnHdl ) );

    m_xBtnResetAll->connect_clicked( LINK( this, ScOptSolverDlg, BtnHdl ) );

    Link<formula::RefEdit&,void> aEditLink = LINK( this, ScOptSolverDlg, GetEditFocusHdl );

    Link<formula::RefButton&,void> aButtonLink = LINK( this, ScOptSolverDlg, GetButtonFocusHdl );

    m_xEdObjectiveCell->SetGetFocusHdl( aEditLink );

    m_xRBObjectiveCell->SetGetFocusHdl( aButtonLink );

    m_xEdTargetValue->SetGetFocusHdl( aEditLink );

    m_xRBTargetValue->SetGetFocusHdl( aButtonLink );

    m_xEdVariableCells->SetGetFocusHdl( aEditLink );

    m_xRBVariableCells->SetGetFocusHdl( aButtonLink );

    Link<weld::Widget&,void> aLink = LINK(this, ScOptSolverDlg, GetFocusHdl);

    m_xRbValue->connect_focus_in(aLink);

    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )

    {

        mpLeftEdit[nRow]->SetGetFocusHdl( aEditLink );

        mpLeftButton[nRow]->SetGetFocusHdl( aButtonLink );

        mpRightEdit[nRow]->SetGetFocusHdl( aEditLink );

        mpRightButton[nRow]->SetGetFocusHdl( aButtonLink );

        mpOperator[nRow]->connect_focus_in(aLink);

    }

    aEditLink = LINK( this, ScOptSolverDlg, LoseEditFocusHdl );

    aButtonLink = LINK( this, ScOptSolverDlg, LoseButtonFocusHdl );

    m_xEdObjectiveCell->SetLoseFocusHdl( aEditLink );

    m_xRBObjectiveCell->SetLoseFocusHdl( aButtonLink );

    m_xEdTargetValue->SetLoseFocusHdl( aEditLink );

    m_xRBTargetValue-> SetLoseFocusHdl( aButtonLink );

    m_xEdVariableCells->SetLoseFocusHdl( aEditLink );

    m_xRBVariableCells->SetLoseFocusHdl( aButtonLink );

    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )

    {

        mpLeftEdit[nRow]->SetLoseFocusHdl( aEditLink );

        mpLeftButton[nRow]->SetLoseFocusHdl( aButtonLink );

        mpRightEdit[nRow]->SetLoseFocusHdl( aEditLink );

        mpRightButton[nRow]->SetLoseFocusHdl( aButtonLink );

    }

    Link<ScCursorRefEdit&,void> aCursorUp = LINK( this, ScOptSolverDlg, CursorUpHdl );

    Link<ScCursorRefEdit&,void> aCursorDown = LINK( this, ScOptSolverDlg, CursorDownHdl );

    Link<formula::RefEdit&,void> aCondModify = LINK( this, ScOptSolverDlg, CondModifyHdl );

    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )

    {

        mpLeftEdit[nRow]->SetCursorLinks( aCursorUp, aCursorDown );

        mpRightEdit[nRow]->SetCursorLinks( aCursorUp, aCursorDown );

        mpLeftEdit[nRow]->SetModifyHdl( aCondModify );

        mpRightEdit[nRow]->SetModifyHdl( aCondModify );

        mpDelButton[nRow]->connect_clicked( LINK( this, ScOptSolverDlg, DelBtnHdl ) );

        mpOperator[nRow]->connect_changed( LINK( this, ScOptSolverDlg, SelectHdl ) );

    }

    m_xEdTargetValue->SetModifyHdl( LINK( this, ScOptSolverDlg, TargetModifyHdl ) );

    Size aSize(m_xContents->get_preferred_size());

    m_xContents->set_size_request(aSize.Width(), aSize.Height());

    m_xScrollBar->connect_vadjustment_value_changed( LINK( this, ScOptSolverDlg, ScrollHdl ) );

    m_xScrollBar->vadjustment_set_page_increment( EDIT_ROW_COUNT );

    m_xScrollBar->vadjustment_set_page_size( EDIT_ROW_COUNT );

    // Range is set in ShowConditions

    // get available solver implementations

    //! sort by descriptions?

    ScSolverUtil::GetImplementations( maImplNames, maDescriptions );

    // Load existing settings stored in the tab

    LoadSolverSettings();

    ShowConditions();

    // If no objective cell has been loaded, then use the selected cell

    if (m_xEdObjectiveCell->GetText().isEmpty())

    {

        OUString aCursorStr;

        if (!mrDoc.GetRangeAtBlock(ScRange(rCursorPos), aCursorStr))

            aCursorStr = rCursorPos.Format(ScRefFlags::ADDR_ABS, nullptr, mrDoc.GetAddressConvention());

        m_xEdObjectiveCell->SetRefString(aCursorStr);

    }

    m_xEdObjectiveCell->GrabFocus();

    mpEdActive = m_xEdObjectiveCell.get();

}

void ScOptSolverDlg::ReadConditions()

{

    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )

    {

        sc::ModelConstraint aRowEntry;

        aRowEntry.aLeftStr = mpLeftEdit[nRow]->GetText();

        aRowEntry.aRightStr = mpRightEdit[nRow]->GetText();

        aRowEntry.nOperator = OperatorIndexToConstraintOperator(mpOperator[nRow]->get_active());

        tools::Long nVecPos = nScrollPos + nRow;

        if ( nVecPos >= static_cast<tools::Long>(m_aConditions.size()) && !aRowEntry.IsDefault() )

            m_aConditions.resize( nVecPos + 1 );

        if ( nVecPos < static_cast<tools::Long>(m_aConditions.size()) )

            m_aConditions[nVecPos] = std::move(aRowEntry);

        // remove default entries at the end

        size_t nSize = m_aConditions.size();

        while ( nSize > 0 && m_aConditions[ nSize-1 ].IsDefault() )

            --nSize;

        m_aConditions.resize( nSize );

    }

}

void ScOptSolverDlg::ShowConditions()

{

    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )

    {

        sc::ModelConstraint aRowEntry;

        tools::Long nVecPos = nScrollPos + nRow;

        if ( nVecPos < static_cast<tools::Long>(m_aConditions.size()) )

            aRowEntry = m_aConditions[nVecPos];

        mpLeftEdit[nRow]->SetRefString( aRowEntry.aLeftStr );

        mpRightEdit[nRow]->SetRefString( aRowEntry.aRightStr );

        mpOperator[nRow]->set_active( aRowEntry.nOperator - 1);

    }

    // allow to scroll one page behind the visible or stored rows

    tools::Long nVisible = nScrollPos + EDIT_ROW_COUNT;

    tools::Long nMax = std::max( nVisible, static_cast<tools::Long>(m_aConditions.size()) );

    m_xScrollBar->vadjustment_configure(nScrollPos, nMax + EDIT_ROW_COUNT, 1, EDIT_ROW_COUNT - 1,

                                        EDIT_ROW_COUNT);

    EnableButtons();

}

void ScOptSolverDlg::EnableButtons()

{

    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )

    {

        tools::Long nVecPos = nScrollPos + nRow;

        mpDelButton[nRow]->set_sensitive(nVecPos < static_cast<tools::Long>(m_aConditions.size()));

    }

}

void ScOptSolverDlg::Close()

{

    if (m_xOptDlg)

        m_xOptDlg->response(RET_CANCEL);

    assert(!m_xOptDlg);

    DoClose( ScOptSolverDlgWrapper::GetChildWindowId() );

}

void ScOptSolverDlg::SetActive()

{

    if ( mbDlgLostFocus )

    {

        mbDlgLostFocus = false;

        if( mpEdActive )

            mpEdActive->GrabFocus();

    }

    else

    {

        m_xDialog->grab_focus();

    }

    RefInputDone();

}

void ScOptSolverDlg::SetReference( const ScRange& rRef, ScDocument& rDocP )

{

    if( !mpEdActive )

        return;

    if ( rRef.aStart != rRef.aEnd )

        RefInputStart(mpEdActive);

    // "target"/"value": single cell

    bool bSingle = ( mpEdActive == m_xEdObjectiveCell.get() || mpEdActive == m_xEdTargetValue.get() );

    OUString aStr;

    ScAddress aAdr = rRef.aStart;

    ScRange aNewRef( rRef );

    if ( bSingle )

        aNewRef.aEnd = aAdr;

    OUString aName;

    if ( rDocP.GetRangeAtBlock( aNewRef, aName ) )            // named range: show name

        aStr = aName;

    else                                                        // format cell/range reference

    {

        ScRefFlags nFmt = ( aAdr.Tab() == mnCurTab ) ? ScRefFlags::ADDR_ABS : ScRefFlags::ADDR_ABS_3D;

        if ( bSingle )

            aStr = aAdr.Format(nFmt, &rDocP, rDocP.GetAddressConvention());

        else

            aStr = rRef.Format(rDocP, nFmt | ScRefFlags::RANGE_ABS, rDocP.GetAddressConvention());

    }

    // variable cells can be several ranges, so only the selection is replaced

    if ( mpEdActive == m_xEdVariableCells.get() )

    {

        OUString aVal = mpEdActive->GetText();

        Selection aSel = mpEdActive->GetSelection();

        aSel.Normalize();

        aVal = aVal.replaceAt( aSel.Min(), aSel.Len(), aStr );

        Selection aNewSel( aSel.Min(), aSel.Min()+aStr.getLength() );

        mpEdActive->SetRefString( aVal );

        mpEdActive->SetSelection( aNewSel );

    }

    else

        mpEdActive->SetRefString( aStr );

    ReadConditions();

    EnableButtons();

    // select "Value of" if a ref is input into "target" edit

    if ( mpEdActive == m_xEdTargetValue.get() )

        m_xRbValue->set_active(true);

}

bool ScOptSolverDlg::IsRefInputMode() const

{

    return mpEdActive != nullptr;

}

// Loads solver settings into the dialog

void ScOptSolverDlg::LoadSolverSettings()

{

    m_xEdObjectiveCell->SetRefString(m_pSolverSettings->GetParameter(sc::SP_OBJ_CELL));

    m_xEdTargetValue->SetRefString(m_pSolverSettings->GetParameter(sc::SP_OBJ_VAL));

    m_xEdVariableCells->SetRefString(m_pSolverSettings->GetParameter(sc::SP_VAR_CELLS));

    // Objective type

    sc::ObjectiveType eType = m_pSolverSettings->GetObjectiveType();

    switch (eType)

    {

        case sc::OT_MAXIMIZE : m_xRbMax->set_active(true); break;

        case sc::OT_MINIMIZE : m_xRbMin->set_active(true); break;

        case sc::OT_VALUE    : m_xRbValue->set_active(true); break;

    }

    // Model constraints

    m_aConditions = m_pSolverSettings->GetConstraints();

    // Loads solver engine name

    // If the solver engine in the current settings are not supported, use the first available

    maEngine = m_pSolverSettings->GetParameter(sc::SP_LO_ENGINE);

    if (!IsEngineAvailable(maEngine))

    {

        maEngine = maImplNames[0];

        m_pSolverSettings->SetParameter(sc::SP_LO_ENGINE, maEngine);

    }

    // Query current engine options

    maProperties = ScSolverUtil::GetDefaults(maEngine);

    m_pSolverSettings->GetEngineOptions(maProperties);

}

// Set solver settings and save them to the file

// But first, checks if the settings have changed

void ScOptSolverDlg::SaveSolverSettings()

{

    // tdf#160104 If file does not have a solver model and the Solver dialog is set to its

    // default initial values (maximize is selected; no variable cells; no target value

    // and no constraints defined) then nothing needs to be saved

    if (!m_pSolverSettings->TabHasSolverModel() && m_xRbMax->get_active()

        && m_xEdTargetValue->GetText().isEmpty() && m_xEdVariableCells->GetText().isEmpty()

        && m_aConditions.size() == 0)

        return;

    // The current tab has a model; now we need to determined if it has been modified

    bool bModified = false;

    // Check objective cell, objective value and variable cells

    if (m_pSolverSettings->GetParameter(sc::SP_OBJ_CELL) != m_xEdObjectiveCell->GetText()

        || m_pSolverSettings->GetParameter(sc::SP_OBJ_VAL) != m_xEdTargetValue->GetText()

        || m_pSolverSettings->GetParameter(sc::SP_VAR_CELLS) != m_xEdVariableCells->GetText())

        bModified = true;

    // Check selected objective type and save it if changed

    sc::ObjectiveType aType = sc::OT_MAXIMIZE;

    if (m_xRbMin->get_active())

        aType = sc::OT_MINIMIZE;

    else if (m_xRbValue->get_active())

        aType = sc::OT_VALUE;

    if (m_pSolverSettings->GetObjectiveType() != aType)

        bModified = true;

    // Check if model constraints changed

    std::vector<sc::ModelConstraint> vCurConditions = m_pSolverSettings->GetConstraints();

    if (!bModified && vCurConditions.size() != m_aConditions.size())

        bModified = true;

    else

    {

        // Here the size of both vectors is the same

        // Now it needs to check the contents of the constraints

        for (size_t i = 0; i < vCurConditions.size(); i++)

        {

            if (vCurConditions[i].aLeftStr != m_aConditions[i].aLeftStr

                || vCurConditions[i].nOperator != m_aConditions[i].nOperator

                || vCurConditions[i].aRightStr != m_aConditions[i].aRightStr)

                bModified = true;

            if (bModified)

                break;

        }

    }

    // Check if the solver engine name and its options have changed

    if (m_pSolverSettings->GetParameter(sc::SP_LO_ENGINE) != maEngine)

    {

        bModified = true;

    }

    else

    {

        // The solver engine hasn't changed, so we need to check if engine options changed

        // Query current engine options; here we start by creating a copy of maProperties

        // to ensure the order is the same

        css::uno::Sequence<css::beans::PropertyValue> vCurOptions(maProperties);

        m_pSolverSettings->GetEngineOptions(vCurOptions);

        for (sal_Int32 i = 0; i < vCurOptions.getLength(); i++)

        {

            if (vCurOptions[i].Value != maProperties[i].Value)

            {

                bModified = true;

                break;

            }

        }

    }

    // Effectively save settings to file if modifications were made

    if (bModified)

    {

        m_pSolverSettings->SetParameter(sc::SP_OBJ_CELL, m_xEdObjectiveCell->GetText());

        m_pSolverSettings->SetParameter(sc::SP_OBJ_VAL, m_xEdTargetValue->GetText());

        m_pSolverSettings->SetParameter(sc::SP_VAR_CELLS, m_xEdVariableCells->GetText());

        m_pSolverSettings->SetObjectiveType(aType);

        m_pSolverSettings->SetConstraints(m_aConditions);

        m_pSolverSettings->SetParameter(sc::SP_LO_ENGINE, maEngine);

        m_pSolverSettings->SetEngineOptions(maProperties);

        m_pSolverSettings->SaveSolverSettings();

    }

}

// Test if a LO engine implementation exists

bool ScOptSolverDlg::IsEngineAvailable(std::u16string_view sEngineName)

{

    auto nIndex = comphelper::findValue(maImplNames, sEngineName);

    return nIndex != -1;

}

// Handler:

IMPL_LINK(ScOptSolverDlg, BtnHdl, weld::Button&, rBtn, void)

{

    auto xKeepAlive = shared_from_this();

    if (&rBtn == m_xBtnSolve.get() || &rBtn == m_xBtnClose.get())

    {

        bool bSolve = ( &rBtn == m_xBtnSolve.get() );

        SetDispatcherLock( false );

        SwitchToDocument();

        bool bClose = true;

        if ( bSolve )

            bClose = CallSolver();

        if ( bClose )

        {

            // Close: write dialog settings to DocShell for subsequent calls

            ReadConditions();

            SaveSolverSettings();

            response(RET_CLOSE);

        }

        else

        {

            // no solution -> dialog is kept open

            SetDispatcherLock( true );

        }

    }

    else if (&rBtn == m_xBtnOpt.get())

    {

        //! move options dialog to UI lib?

        m_xOptDlg = std::make_shared<ScSolverOptionsDialog>(m_xDialog.get(), maImplNames, maDescriptions, maEngine, maProperties);

        weld::DialogController::runAsync(m_xOptDlg, [this](sal_Int32 nResult){

            if (nResult == RET_OK)

            {

                maEngine = m_xOptDlg->GetEngine();

                maProperties = m_xOptDlg->GetProperties();

            }

            m_xOptDlg.reset();

        });

    }

    else if (&rBtn == m_xBtnResetAll.get())

    {

        OUString sEmpty;

        m_xEdObjectiveCell->SetText(sEmpty);

        m_xEdTargetValue->SetText(sEmpty);

        m_xEdVariableCells->SetText(sEmpty);

        // Get default property values of solver implementations

        maEngine = maImplNames[0];

        maProperties = ScSolverUtil::GetDefaults( maEngine );

        // Clear all conditions (Constraints)

        m_aConditions.clear();

        ShowConditions();

        m_xRbMax->set_active(true);

        m_xEdObjectiveCell->GrabFocus();

        mpEdActive = m_xEdObjectiveCell.get();

    }

}

IMPL_LINK( ScOptSolverDlg, GetEditFocusHdl, formula::RefEdit&, rCtrl, void )

{

    formula::RefEdit* pEdit = nullptr;

    mpEdActive = nullptr;

    if( &rCtrl == m_xEdObjectiveCell.get() )

        pEdit = mpEdActive = m_xEdObjectiveCell.get();

    else if( &rCtrl == m_xEdTargetValue.get() )

        pEdit = mpEdActive = m_xEdTargetValue.get();

    else if( &rCtrl == m_xEdVariableCells.get() )

        pEdit = mpEdActive = m_xEdVariableCells.get();

    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )

    {

        if( &rCtrl == mpLeftEdit[nRow]  )

            pEdit = mpEdActive = mpLeftEdit[nRow];

        else if( &rCtrl == mpRightEdit[nRow]  )

            pEdit = mpEdActive = mpRightEdit[nRow];

    }

    if( pEdit )

        pEdit->SelectAll();

}

IMPL_LINK( ScOptSolverDlg, GetButtonFocusHdl, formula::RefButton&, rCtrl, void )

{

    formula::RefEdit* pEdit = nullptr;

    mpEdActive = nullptr;

    if( &rCtrl == m_xRBObjectiveCell.get() )

        pEdit = mpEdActive = m_xEdObjectiveCell.get();

    else if( &rCtrl == m_xRBTargetValue.get() )

        pEdit = mpEdActive = m_xEdTargetValue.get();

    else if( &rCtrl == m_xRBVariableCells.get() )

        pEdit = mpEdActive = m_xEdVariableCells.get();

    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )

    {

        if( &rCtrl == mpLeftButton[nRow] )

            pEdit = mpEdActive = mpLeftEdit[nRow];

        else if( &rCtrl == mpRightButton[nRow] )

            pEdit = mpEdActive = mpRightEdit[nRow];

    }

    if( pEdit )

        pEdit->SelectAll();

}

IMPL_LINK(ScOptSolverDlg, GetFocusHdl, weld::Widget&, rCtrl, void)

{

    if( &rCtrl == m_xRbValue.get() )                   // focus on "Value of" radio button

        mpEdActive = m_xEdTargetValue.get();          // use value edit for ref input, but don't change selection

    else

    {

        for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )

        {

            if( &rCtrl == mpOperator[nRow] )    // focus on "operator" list box

                mpEdActive = mpRightEdit[nRow];     // use right edit for ref input, but don't change selection

        }

    }

}

IMPL_LINK_NOARG(ScOptSolverDlg, LoseEditFocusHdl, formula::RefEdit&, void)

{

    mbDlgLostFocus = !m_xDialog->has_toplevel_focus();

}

IMPL_LINK_NOARG(ScOptSolverDlg, LoseButtonFocusHdl, formula::RefButton&, void)

{

    mbDlgLostFocus = !m_xDialog->has_toplevel_focus();

}

IMPL_LINK(ScOptSolverDlg, DelBtnHdl, weld::Button&, rBtn, void)

{

    for ( sal_uInt16 nRow = 0; nRow < EDIT_ROW_COUNT; ++nRow )

        if (&rBtn == mpDelButton[nRow])

        {

            bool bHadFocus = rBtn.has_focus();

            ReadConditions();

            tools::Long nVecPos = nScrollPos + nRow;

            if ( nVecPos < static_cast<tools::Long>(m_aConditions.size()) )

            {

                m_aConditions.erase( m_aConditions.begin() + nVecPos );

                ShowConditions();

                if ( bHadFocus && !rBtn.get_sensitive() )

                {

                    // If the button is disabled, focus would normally move to the next control,

                    // (left edit of the next row). Move it to left edit of this row instead.

                    mpEdActive = mpLeftEdit[nRow];

                    mpEdActive->GrabFocus();

                }

            }

        }

}

IMPL_LINK_NOARG(ScOptSolverDlg, TargetModifyHdl, formula::RefEdit&, void)

{

    // modify handler for the target edit:

    //  select "Value of" if something is input into the edit

    if ( !m_xEdTargetValue->GetText().isEmpty() )

        m_xRbValue->set_active(true);

}

IMPL_LINK_NOARG(ScOptSolverDlg, CondModifyHdl, formula::RefEdit&, void)

{

    // modify handler for the condition edits, just to enable/disable "delete" buttons

    ReadConditions();

    EnableButtons();

}

IMPL_LINK_NOARG(ScOptSolverDlg, SelectHdl, weld::ComboBox&, void)

{

    // select handler for operator list boxes, just to enable/disable "delete" buttons

    ReadConditions();

    EnableButtons();

}

IMPL_LINK_NOARG(ScOptSolverDlg, ScrollHdl, weld::ScrolledWindow&, void)

{

    ReadConditions();

    nScrollPos = m_xScrollBar->vadjustment_get_value();

    ShowConditions();

    if( mpEdActive )

        mpEdActive->SelectAll();

}

IMPL_LINK( ScOptSolverDlg, CursorUpHdl, ScCursorRefEdit&, rEdit, void )

{

    if ( &rEdit == mpLeftEdit[0] || &rEdit == mpRightEdit[0] )

    {

        if ( nScrollPos > 0 )

        {

            ReadConditions();

            --nScrollPos;

            ShowConditions();

            if( mpEdActive )

                mpEdActive->SelectAll();

        }

    }

    else

    {

        formula::RefEdit* pFocus = nullptr;

        for ( sal_uInt16 nRow = 1; nRow < EDIT_ROW_COUNT; ++nRow )      // second row or below: move focus

        {

            if ( &rEdit == mpLeftEdit[nRow] )

                pFocus = mpLeftEdit[nRow-1];

            else if ( &rEdit == mpRightEdit[nRow] )

                pFocus = mpRightEdit[nRow-1];

        }

        if (pFocus)

        {

            mpEdActive = pFocus;

            pFocus->GrabFocus();

        }

    }

}

IMPL_LINK( ScOptSolverDlg, CursorDownHdl, ScCursorRefEdit&, rEdit, void )

{

    if ( &rEdit == mpLeftEdit[EDIT_ROW_COUNT-1] || &rEdit == mpRightEdit[EDIT_ROW_COUNT-1] )

    {

        //! limit scroll position?

        ReadConditions();

        ++nScrollPos;

        ShowConditions();

        if( mpEdActive )

            mpEdActive->SelectAll();

    }

    else

    {

        formula::RefEdit* pFocus = nullptr;

        for ( sal_uInt16 nRow = 0; nRow+1 < EDIT_ROW_COUNT; ++nRow )      // before last row: move focus

        {

            if ( &rEdit == mpLeftEdit[nRow] )

                pFocus = mpLeftEdit[nRow+1];

            else if ( &rEdit == mpRightEdit[nRow] )

                pFocus = mpRightEdit[nRow+1];

        }

        if (pFocus)

        {

            mpEdActive = pFocus;

            pFocus->GrabFocus();

        }

    }

}

// Converts the position of the operator in the dropdown menu to a ConstraintOperator type

sc::ConstraintOperator ScOptSolverDlg::OperatorIndexToConstraintOperator(sal_Int32 nIndex)

{

    switch(nIndex)

    {

        case 0  : return sc::CO_LESS_EQUAL; break;

        case 1  : return sc::CO_EQUAL; break;

        case 2  : return sc::CO_GREATER_EQUAL; break;

        case 3  : return sc::CO_INTEGER; break;

        case 4  : return sc::CO_BINARY; break;

        default : return sc::CO_LESS_EQUAL; break;

    }

}

void ScOptSolverDlg::ShowError( bool bCondition, formula::RefEdit* pFocus )

{

    OUString aMessage = bCondition ? maConditionError : maInputError;

    std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(m_xDialog.get(),

                                              VclMessageType::Warning, VclButtonsType::Ok,

                                              aMessage));