/* -*- 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 <OutlineView.hxx>
#include <sfx2/progress.hxx>
#include <vcl/commandinfoprovider.hxx>
#include <vcl/svapp.hxx>
#include <svx/svxids.hrc>
#include <editeng/outliner.hxx>
#include <editeng/eeitem.hxx>
#include <editeng/editstat.hxx>
#include <editeng/lrspitem.hxx>
#include <svx/svdotext.hxx>
#include <sfx2/viewfrm.hxx>
#include <svl/style.hxx>
#include <svx/svdundo.hxx>
#include <editeng/numitem.hxx>
#include <editeng/outlobj.hxx>
#include <editeng/editeng.hxx>
#include <xmloff/autolayout.hxx>
#include <tools/debug.hxx>
#include <officecfg/Office/Common.hxx>

#include <editeng/editobj.hxx>
#include <editeng/editund2.hxx>

#include <editeng/editview.hxx>

#include <com/sun/star/frame/XFrame.hpp>

#include <DrawDocShell.hxx>
#include <drawdoc.hxx>
#include <Window.hxx>
#include <sdpage.hxx>
#include <pres.hxx>
#include <OutlineViewShell.hxx>
#include <app.hrc>
#include <strings.hrc>
#include <sdmod.hxx>
#include <sdresid.hxx>
#include <Outliner.hxx>
#include <EventMultiplexer.hxx>
#include <ViewShellBase.hxx>
#include <ViewShellManager.hxx>
#include <undo/undomanager.hxx>
#include <stlsheet.hxx>

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

namespace sd {

// a progress bar gets displayed when more than
// PROCESS_WITH_PROGRESS_THRESHOLD pages are concerned
#define PROCESS_WITH_PROGRESS_THRESHOLD  5

OutlineView::OutlineView(DrawDocShell& rDocSh, vcl::Window* pWindow,
                         OutlineViewShell& rOutlineViewShell)
    : ::sd::SimpleOutlinerView(*rDocSh.GetDoc(), pWindow->GetOutDev(), &rOutlineViewShell)
    , mrOutlineViewShell(rOutlineViewShell)
    , mrOutliner(*mrDoc.GetOutliner())
    , mnPagesToProcess(0)
    , mnPagesProcessed(0)
    , mbFirstPaint(true)
    , maDocColor(COL_WHITE)
    , maLRSpaceItem(SvxIndentValue::twips(2000), SvxIndentValue::zero(), SvxIndentValue::zero(),
                    EE_PARA_OUTLLRSPACE)
{
    bool bInitOutliner = false;

    if (mrOutliner.GetViewCount() == 0)
    {
        // initialize Outliner: set Reference Device
        bInitOutliner = true;
        mrOutliner.Init( OutlinerMode::OutlineView );
        mrOutliner.SetRefDevice(SdModule::get()->GetVirtualRefDevice());
        //viewsize without the width of the image and number in front
        mnPaperWidth = (mrOutlineViewShell.GetActiveWindow()->GetViewSize().Width() - 4000);
        mrOutliner.SetPaperSize(Size(mnPaperWidth, 400000000));
    }
    else
    {
        // width: DIN A4, two margins at 1 cm each
        mnPaperWidth = 19000;
    }

    mpOutlinerViews[0].reset( new OutlinerView(&mrOutliner, pWindow) );
    mpOutlinerViews[0]->SetOutputArea(::tools::Rectangle());
    mrOutliner.SetUpdateLayout(false);
    mrOutliner.InsertView(mpOutlinerViews[0].get(), EE_APPEND);

    onUpdateStyleSettings( true );

    if (bInitOutliner)
    {
        // fill Outliner with contents
        FillOutliner();
    }

    Link<tools::EventMultiplexerEvent&,void> aLink( LINK(this,OutlineView,EventMultiplexerListener) );
    mrOutlineViewShell.GetViewShellBase().GetEventMultiplexer()->AddEventListener(aLink);

    Reference<XFrame> xFrame;
    if (SfxViewFrame* pFrame = mrOutlineViewShell.GetViewShellBase().GetFrame())
        xFrame = pFrame->GetFrame().GetFrameInterface();
    maSlideImage = vcl::CommandInfoProvider::GetImageForCommand(u".uno:ShowSlide"_ustr, xFrame, vcl::ImageType::Size26);

    // Tell undo manager of the document about the undo manager of the
    // outliner, so that the former can synchronize with the later.
    sd::UndoManager* pDocUndoMgr = dynamic_cast<sd::UndoManager*>(mpDocSh->GetUndoManager());
    if (pDocUndoMgr != nullptr)
        pDocUndoMgr->SetLinkedUndoManager(&mrOutliner.GetUndoManager());
}

/**
 * Destructor, restore Links, clear Outliner
 */
OutlineView::~OutlineView()
{
    DBG_ASSERT(maDragAndDropModelGuard == nullptr,
               "sd::OutlineView::~OutlineView(), prior drag operation not finished correctly!");

    Link<tools::EventMultiplexerEvent&,void> aLink( LINK(this,OutlineView,EventMultiplexerListener) );
    mrOutlineViewShell.GetViewShellBase().GetEventMultiplexer()->RemoveEventListener( aLink );
    DisconnectFromApplication();

    mpProgress.reset();

    // unregister OutlinerViews and destroy them
    for (auto & rpView : mpOutlinerViews)
    {
        if (rpView)
        {
            mrOutliner.RemoveView( rpView.get() );
            rpView.reset();
        }
    }

    if (mrOutliner.GetViewCount() == 0)
    {
        // uninitialize Outliner: enable color display
        ResetLinks();
        EEControlBits nCntrl = mrOutliner.GetControlWord();
        mrOutliner.SetUpdateLayout(false); // otherwise there will be drawn on SetControlWord
        mrOutliner.SetControlWord(nCntrl & ~EEControlBits::NOCOLORS);
        mrOutliner.ForceAutoColor( officecfg::Office::Common::Accessibility::IsAutomaticFontColor::get() );
        mrOutliner.Clear();
    }
}

void OutlineView::ConnectToApplication()
{
    // When the mode is switched to outline the main view shell grabs focus.
    // This is done for getting cut/copy/paste commands on slides in the left
    // pane (slide sorter view shell) to work properly.
    SfxShell* pTopViewShell = mrOutlineViewShell.GetViewShellBase().GetViewShellManager()->GetTopViewShell();
    if (pTopViewShell && pTopViewShell == &mrOutlineViewShell)
    {
        mrOutlineViewShell.GetActiveWindow()->GrabFocus();
    }

    Application::AddEventListener(LINK(this, OutlineView, AppEventListenerHdl));
}

void OutlineView::DisconnectFromApplication()
{
    Application::RemoveEventListener(LINK(this, OutlineView, AppEventListenerHdl));
}

void OutlineView::Paint(const ::tools::Rectangle& rRect, ::sd::Window const * pWin)
{
    OutlinerView* pOlView = GetViewByWindow(pWin);

    if (pOlView)
    {
        pOlView->HideCursor();
        pOlView->Paint(rRect);

        pOlView->ShowCursor(mbFirstPaint);

        mbFirstPaint = false;
    }
}

void OutlineView::AddDeviceToPaintView(OutputDevice& rDev, vcl::Window* pWindow)
{
    bool bAdded = false;
    bool bValidArea = false;
    ::tools::Rectangle aOutputArea;
    const Color aWhiteColor( COL_WHITE );
    sal_uInt16 nView = 0;

    while (nView < MAX_OUTLINERVIEWS && !bAdded)
    {
        if (mpOutlinerViews[nView] == nullptr)
        {
            mpOutlinerViews[nView].reset( new OutlinerView(&mrOutliner, dynamic_cast< ::sd::Window* >(rDev.GetOwnerWindow())) );
            mpOutlinerViews[nView]->SetBackgroundColor( aWhiteColor );
            mrOutliner.InsertView(mpOutlinerViews[nView].get(), EE_APPEND);
            bAdded = true;

            if (bValidArea)
            {
                mpOutlinerViews[nView]->SetOutputArea(aOutputArea);
            }
        }
        else if (!bValidArea)
        {
            aOutputArea = mpOutlinerViews[nView]->GetOutputArea();
            bValidArea = true;
        }

        nView++;
    }

    // white background in Outliner
    rDev.SetBackground( Wallpaper( aWhiteColor ) );

    ::sd::View::AddDeviceToPaintView(rDev, pWindow);
}

void OutlineView::DeleteDeviceFromPaintView(OutputDevice& rDev)
{
    bool bRemoved = false;
    sal_uInt16 nView = 0;
    vcl::Window* pWindow;

    while (nView < MAX_OUTLINERVIEWS && !bRemoved)
    {
        if (mpOutlinerViews[nView] != nullptr)
        {
            pWindow = mpOutlinerViews[nView]->GetWindow();

            if (pWindow->GetOutDev() == &rDev)
            {
                mrOutliner.RemoveView( mpOutlinerViews[nView].get() );
                mpOutlinerViews[nView].reset();
                bRemoved = true;
            }
        }

        nView++;
    }

    ::sd::View::DeleteDeviceFromPaintView(rDev);
}

/**
 * Return a pointer to the OutlinerView corresponding to the window
 */
OutlinerView* OutlineView::GetViewByWindow (vcl::Window const * pWin) const
{
    OutlinerView* pOlView = nullptr;
    for (std::unique_ptr<OutlinerView> const & pView : mpOutlinerViews)
    {
        if (pView != nullptr)
        {
            if ( pWin == pView->GetWindow() )
            {
                pOlView = pView.get();
            }
        }
    }
    return pOlView;
}

/**
 * Return the title before a random paragraph
 */
Paragraph* OutlineView::GetPrevTitle(const Paragraph* pPara)
{
    sal_Int32 nPos = mrOutliner.GetAbsPos(pPara);

    if (nPos > 0)
    {
        while(nPos)
        {
            pPara = mrOutliner.GetParagraph(--nPos);
            if( ::Outliner::HasParaFlag(pPara, ParaFlag::ISPAGE) )
            {
                return const_cast< Paragraph* >( pPara );
            }
        }

    }
    return nullptr;
}

/**
 * Return the title after a random paragraph
 */
Paragraph* OutlineView::GetNextTitle(const Paragraph* pPara)
{
    Paragraph* pResult = const_cast< Paragraph* >( pPara );

    sal_Int32 nPos = mrOutliner.GetAbsPos(pResult);

    do
    {
        pResult = mrOutliner.GetParagraph(++nPos);
        if( pResult && ::Outliner::HasParaFlag(pResult, ParaFlag::ISPAGE) )
            return pResult;
    }
    while( pResult );

    return nullptr;
}

/**
 * Handler for inserting pages (paragraphs)
 */
IMPL_LINK( OutlineView, ParagraphInsertedHdl, Outliner::ParagraphHdlParam, aParam, void )
{
    // we get calls to this handler during binary insert of drag and drop contents but
    // we ignore it here and handle it later in OnEndPasteOrDrop()
    if (maDragAndDropModelGuard != nullptr)
        return;

    OutlineViewPageChangesGuard aGuard(this);

    sal_Int32 nAbsPos = mrOutliner.GetAbsPos( aParam.pPara );

    UpdateParagraph( nAbsPos );

    if( (nAbsPos == 0) ||
        ::Outliner::HasParaFlag(aParam.pPara, ParaFlag::ISPAGE) ||
        ::Outliner::HasParaFlag(mrOutliner.GetParagraph( nAbsPos-1 ), ParaFlag::ISPAGE) )
    {
        InsertSlideForParagraph( aParam.pPara );
    }
}

/** creates and inserts an empty slide for the given paragraph */
SdPage* OutlineView::InsertSlideForParagraph( Paragraph* pPara )
{
    DBG_ASSERT( isRecordingUndo(), "sd::OutlineView::InsertSlideForParagraph(), model change without undo?!" );

    OutlineViewPageChangesGuard aGuard(this);

    mrOutliner.SetParaFlag( pPara, ParaFlag::ISPAGE );
    // how many titles are there before the new title paragraph?
    sal_uLong nExample = 0;            // position of the "example" page
    sal_uLong nTarget  = 0;            // position of insertion
    while(pPara)
    {
        pPara = GetPrevTitle(pPara);
        if (pPara)
            nTarget++;
    }

    // if a new paragraph is created via RETURN before the first paragraph, the
    // Outliner reports the old paragraph (which was moved down) as a new
    // paragraph
    if (nTarget == 1)
    {
        OUString aTest = mrOutliner.GetText(mrOutliner.GetParagraph(0));
        if (aTest.isEmpty())
        {
            nTarget = 0;
        }
    }

    // the "example" page is the previous page - if it is available
    if (nTarget > 0)
    {
        nExample = nTarget - 1;

        sal_uInt16 nPageCount = mrDoc.GetSdPageCount( PageKind::Standard );
        if( nExample >= nPageCount )
            nExample = nPageCount - 1;
    }

    /**********************************************************************
    * All the time, a standard page is created before a notes page.
    * It is ensured that after each standard page the corresponding notes page
    * follows. A handout page is exactly one handout page.
    **********************************************************************/

    // this page is exemplary
    SdPage* pExample = mrDoc.GetSdPage(static_cast<sal_uInt16>(nExample), PageKind::Standard);
    rtl::Reference<SdPage> pPage = mrDoc.AllocSdPage(false);

    pPage->SetLayoutName(pExample->GetLayoutName());

    // insert (page)
    mrDoc.InsertPage(pPage.get(), static_cast<sal_uInt16>(nTarget) * 2 + 1);
    if( isRecordingUndo() )
        AddUndo(mrDoc.GetSdrUndoFactory().CreateUndoNewPage(*pPage));

    // assign a master page to the standard page
    pPage->TRG_SetMasterPage(pExample->TRG_GetMasterPage());

    // set page size
    pPage->SetSize(pExample->GetSize());
    pPage->SetBorder( pExample->GetLeftBorder(),
                      pExample->GetUpperBorder(),
                      pExample->GetRightBorder(),
                      pExample->GetLowerBorder() );

    // create new presentation objects (after <Title> or <Title with subtitle>
    // follows <Title with outline>, otherwise apply the layout of the previous
    // page
    AutoLayout eAutoLayout = pExample->GetAutoLayout();
    if (eAutoLayout == AUTOLAYOUT_TITLE ||
        eAutoLayout == AUTOLAYOUT_TITLE_ONLY)
    {
        pPage->SetAutoLayout(AUTOLAYOUT_TITLE_CONTENT, true);
    }
    else
    {
        pPage->SetAutoLayout(pExample->GetAutoLayout(), true);
    }

    /**********************************************************************
    |* now the notes page
    \*********************************************************************/
    pExample = mrDoc.GetSdPage(static_cast<sal_uInt16>(nExample), PageKind::Notes);
    rtl::Reference<SdPage> pNotesPage = mrDoc.AllocSdPage(false);

    pNotesPage->SetLayoutName(pExample->GetLayoutName());

    pNotesPage->SetPageKind(PageKind::Notes);

    // insert (notes page)
    mrDoc.InsertPage(pNotesPage.get(), static_cast<sal_uInt16>(nTarget) * 2 + 2);
    if( isRecordingUndo() )
        AddUndo(mrDoc.GetSdrUndoFactory().CreateUndoNewPage(*pNotesPage));

    // assign a master page to the notes page
    pNotesPage->TRG_SetMasterPage(pExample->TRG_GetMasterPage());

    // set page size, there must be already one page available
    pNotesPage->SetSize(pExample->GetSize());
    pNotesPage->SetBorder( pExample->GetLeftBorder(),
                           pExample->GetUpperBorder(),
                           pExample->GetRightBorder(),
                           pExample->GetLowerBorder() );

    // create presentation objects
    pNotesPage->SetAutoLayout(pExample->GetAutoLayout(), true);

    mrOutliner.UpdateFields();

    return pPage.get();
}

/**
 * Handler for deleting pages (paragraphs)
 */
IMPL_LINK( OutlineView, ParagraphRemovingHdl, ::Outliner::ParagraphHdlParam, aParam, void )
{
    DBG_ASSERT( isRecordingUndo(), "sd::OutlineView::ParagraphRemovingHdl(), model change without undo?!" );

    OutlineViewPageChangesGuard aGuard(this);

    Paragraph* pPara = aParam.pPara;
    if( !::Outliner::HasParaFlag( pPara, ParaFlag::ISPAGE ) )
        return;

    // how many titles are in front of the title paragraph in question?
    sal_uLong nPos = 0;
    while(pPara)
    {
        pPara = GetPrevTitle(pPara);
        if (pPara) nPos++;
    }

    // delete page and notes page
    sal_uInt16 nAbsPos = static_cast<sal_uInt16>(nPos) * 2 + 1;
    SdrPage* pPage = mrDoc.GetPage(nAbsPos);
    if( isRecordingUndo() )
        AddUndo(mrDoc.GetSdrUndoFactory().CreateUndoDeletePage(*pPage));
    mrDoc.RemovePage(nAbsPos);

    nAbsPos = static_cast<sal_uInt16>(nPos) * 2 + 1;
    pPage = mrDoc.GetPage(nAbsPos);
    if( isRecordingUndo() )
        AddUndo(mrDoc.GetSdrUndoFactory().CreateUndoDeletePage(*pPage));
    mrDoc.RemovePage(nAbsPos);

    // progress display if necessary
    if (mnPagesToProcess)
    {
        mnPagesProcessed++;

        if(mpProgress)
            mpProgress->SetState(mnPagesProcessed);

        if (mnPagesProcessed == mnPagesToProcess)
        {
            mpProgress.reset();
            mnPagesToProcess = 0;
            mnPagesProcessed = 0;
        }
    }
    aParam.pOutliner->UpdateFields();
}

/**
 * Handler for changing the indentation depth of paragraphs (requires inserting
 * or deleting of pages in some cases)
 */
IMPL_LINK( OutlineView, DepthChangedHdl, ::Outliner::DepthChangeHdlParam, aParam, void )
{
    DBG_ASSERT( isRecordingUndo(), "sd::OutlineView::DepthChangedHdl(), no undo for model change?!" );

    OutlineViewPageChangesGuard aGuard(this);

    Paragraph* pPara = aParam.pPara;
    ::Outliner* pOutliner = aParam.pOutliner;
    if( ::Outliner::HasParaFlag( pPara, ParaFlag::ISPAGE ) && ((aParam.nPrevFlags & ParaFlag::ISPAGE) == ParaFlag::NONE) )
    {
        // the current paragraph is transformed into a slide

        mrOutliner.SetDepth( pPara, -1 );

        // are multiple level 1 paragraphs being brought to level 0 and we
        // should start a progress view or a timer and didn't already?
        if (mnPagesToProcess == 0)
        {
            Window*       pActWin = mrOutlineViewShell.GetActiveWindow();
            OutlinerView* pOlView = GetViewByWindow(pActWin);

            std::vector<Paragraph*> aSelList;
            pOlView->CreateSelectionList(aSelList);

            mnPagesToProcess = std::count_if(aSelList.begin(), aSelList.end(),
                [&pOutliner](const Paragraph *pParagraph) {
                    return !Outliner::HasParaFlag(pParagraph, ParaFlag::ISPAGE) &&
                        (pOutliner->GetDepth(pOutliner->GetAbsPos(pParagraph)) <= 0);
                });

            mnPagesToProcess++; // the paragraph being in level 0 already
                                // should be included
            mnPagesProcessed = 0;

            if (mnPagesToProcess > PROCESS_WITH_PROGRESS_THRESHOLD)
            {
                mpProgress.reset( new SfxProgress( GetDocSh(), SdResId(STR_CREATE_PAGES), mnPagesToProcess ) );
            }
            else
            {
                mpDocSh->SetWaitCursor( true );
            }
        }

        ParagraphInsertedHdl( { aParam.pOutliner, aParam.pPara } );

        mnPagesProcessed++;

        // should there be a progress display?
        if (mnPagesToProcess > PROCESS_WITH_PROGRESS_THRESHOLD)
        {
            if (mpProgress)
                mpProgress->SetState(mnPagesProcessed);
        }

        // was this the last page?
        if (mnPagesProcessed == mnPagesToProcess)
        {
            if (mnPagesToProcess > PROCESS_WITH_PROGRESS_THRESHOLD && mpProgress)
            {
                mpProgress.reset();
            }
            else
                mpDocSh->SetWaitCursor( false );

            mnPagesToProcess = 0;
            mnPagesProcessed = 0;
        }
        pOutliner->UpdateFields();
    }
    else if( !::Outliner::HasParaFlag( pPara, ParaFlag::ISPAGE ) && ((aParam.nPrevFlags & ParaFlag::ISPAGE) != ParaFlag::NONE) )
    {
        // the paragraph was a page but now becomes a normal paragraph

        // how many titles are before the title paragraph in question?
        sal_uLong nPos = 0;
        Paragraph* pParagraph = pPara;
        while(pParagraph)
        {
            pParagraph = GetPrevTitle(pParagraph);
            if (pParagraph)
                nPos++;
        }
        // delete page and notes page

        sal_uInt16 nAbsPos = static_cast<sal_uInt16>(nPos) * 2 + 1;
        SdrPage* pPage = mrDoc.GetPage(nAbsPos);
        if( isRecordingUndo() )
            AddUndo(mrDoc.GetSdrUndoFactory().CreateUndoDeletePage(*pPage));
        mrDoc.RemovePage(nAbsPos);

        nAbsPos = static_cast<sal_uInt16>(nPos) * 2 + 1;
        pPage = mrDoc.GetPage(nAbsPos);
        if( isRecordingUndo() )
            AddUndo(mrDoc.GetSdrUndoFactory().CreateUndoDeletePage(*pPage));
        mrDoc.RemovePage(nAbsPos);

        pPage = GetPageForParagraph( pPara );

        mrOutliner.SetDepth( pPara, (pPage && (static_cast<SdPage*>(pPage)->GetAutoLayout() == AUTOLAYOUT_TITLE)) ?  -1 : 0 );

        // progress display if necessary
        if (mnPagesToProcess)
        {
            mnPagesProcessed++;
            if (mpProgress)
                mpProgress->SetState(mnPagesProcessed);

            if (mnPagesProcessed == mnPagesToProcess)
            {
                mpProgress.reset();
                mnPagesToProcess = 0;
                mnPagesProcessed = 0;
            }
        }
        pOutliner->UpdateFields();
    }
    else if ( (pOutliner->GetPrevDepth() == 1) && ( pOutliner->GetDepth( pOutliner->GetAbsPos( pPara ) ) == 2 ) )
    {
        // how many titles are in front of the title paragraph in question?
        sal_Int32 nPos = -1;

        Paragraph* pParagraph = pPara;
        while(pParagraph)
        {
            pParagraph = GetPrevTitle(pParagraph);
            if (pParagraph)
                nPos++;
        }

        if(nPos >= 0)
        {
            SdPage*pPage = mrDoc.GetSdPage( static_cast<sal_uInt16>(nPos), PageKind::Standard);

            if(pPage && pPage->GetPresObj(PresObjKind::Text))
                pOutliner->SetDepth( pPara, 0 );
        }

    }
    // how many titles are in front of the title paragraph in question?
    sal_Int32 nPos = -1;

    Paragraph* pTempPara = pPara;
    while(pTempPara)
    {
        pTempPara = GetPrevTitle(pTempPara);
        if (pTempPara)
            nPos++;
    }

    if( nPos < 0 )
        return;

    SdPage* pPage = mrDoc.GetSdPage( static_cast<sal_uInt16>(nPos), PageKind::Standard );

    if( !pPage )
        return;

    SfxStyleSheet* pStyleSheet = nullptr;
    sal_Int32 nPara = pOutliner->GetAbsPos( pPara );
    sal_Int16 nDepth = pOutliner->GetDepth( nPara );
    bool bSubTitle = pPage->GetPresObj(PresObjKind::Text) != nullptr;

    if( ::Outliner::HasParaFlag(pPara, ParaFlag::ISPAGE) )
    {
        pStyleSheet = pPage->GetStyleSheetForPresObj( PresObjKind::Title );
    }
    else if( bSubTitle )
    {
        pStyleSheet = pPage->GetStyleSheetForPresObj( PresObjKind::Text );
    }
    else
    {
        pStyleSheet = pPage->GetStyleSheetForPresObj( PresObjKind::Outline );

        if( nDepth > 0 )
        {
            OUString aNewStyleSheetName = pStyleSheet->GetName();
            if (!aNewStyleSheetName.isEmpty())
                aNewStyleSheetName = aNewStyleSheetName.copy(0, aNewStyleSheetName.getLength() - 1);
            aNewStyleSheetName += OUString::number( nDepth+1 );
            SfxStyleSheetBasePool* pStylePool = mrDoc.GetStyleSheetPool();
            pStyleSheet = static_cast<SfxStyleSheet*>( pStylePool->Find( aNewStyleSheetName, pStyleSheet->GetFamily() ) );
        }
    }

    // before we set the style sheet we need to preserve the bullet item
    // since all items will be deleted while setting a new style sheet
    SfxItemSet aOldAttrs( pOutliner->GetParaAttribs( nPara ) );

    pOutliner->SetStyleSheet( nPara, pStyleSheet );

    // restore the old bullet item but not if the style changed
    const SvxNumBulletItem* pBulletItem = nullptr;
    if ( pOutliner->GetPrevDepth() != -1 && nDepth != -1 &&
         aOldAttrs.GetItemState( EE_PARA_NUMBULLET, true, &pBulletItem ) == SfxItemState::SET )
    {
        SfxItemSet aAttrs( pOutliner->GetParaAttribs( nPara ) );
        aAttrs.Put( *pBulletItem );
        pOutliner->SetParaAttribs( nPara, aAttrs );
    }
}

/**
 * Handler for StatusEvents
 */
IMPL_LINK_NOARG(OutlineView, StatusEventHdl, EditStatus&, void)
{
    ::sd::Window*   pWin = mrOutlineViewShell.GetActiveWindow();
    OutlinerView*   pOutlinerView = GetViewByWindow(pWin);
    ::tools::Rectangle       aVis          = pOutlinerView->GetVisArea();
    ::tools::Rectangle       aText(Point(0,0),
                                   Size(mnPaperWidth,
                                   mrOutliner.GetTextHeight()));
    ::tools::Rectangle aWin(Point(0,0), pWin->GetOutputSizePixel());
    aWin = pWin->PixelToLogic(aWin);

    if (!aVis.IsEmpty())        // not when opening
    {
        if (aWin.GetHeight() > aText.Bottom())
            aText.SetBottom( aWin.GetHeight() );

        mrOutlineViewShell.InitWindows(Point(0,0), aText.GetSize(), aVis.TopLeft());
        mrOutlineViewShell.UpdateScrollBars();
    }
}

IMPL_LINK_NOARG(OutlineView, BeginDropHdl, EditView*, void)
{
    DBG_ASSERT(maDragAndDropModelGuard == nullptr,
               "sd::OutlineView::BeginDropHdl(), prior drag operation not finished correctly!");

    maDragAndDropModelGuard.reset( new OutlineViewModelChangeGuard( *this ) );
}

IMPL_LINK_NOARG(OutlineView, EndDropHdl, EditView*, void)
{
    maDragAndDropModelGuard.reset();
}

/**
 * Handler for the start of a paragraph movement
 */
IMPL_LINK( OutlineView, BeginMovingHdl, ::Outliner *, pOutliner, void )
{
    OutlineViewPageChangesGuard aGuard(this);

    // list of selected title paragraphs
    mpOutlinerViews[0]->CreateSelectionList(maSelectedParas);

    std::erase_if(maSelectedParas,
        [](const Paragraph* pPara) { return !Outliner::HasParaFlag(pPara, ParaFlag::ISPAGE); });

    // select the pages belonging to the paragraphs on level 0 to select
    sal_uInt16 nPos = 0;
    sal_Int32 nParaPos = 0;
    Paragraph* pPara = pOutliner->GetParagraph( 0 );
    std::vector<Paragraph*>::const_iterator fiter;

    while(pPara)
    {
        if( ::Outliner::HasParaFlag(pPara, ParaFlag::ISPAGE) )                     // one page?
        {
            maOldParaOrder.push_back(pPara);
            SdPage* pPage = mrDoc.GetSdPage(nPos, PageKind::Standard);

            fiter = std::find(maSelectedParas.begin(),maSelectedParas.end(),pPara);

            pPage->SetSelected(fiter != maSelectedParas.end());

            ++nPos;
        }
        pPara = pOutliner->GetParagraph( ++nParaPos );
    }
}

/**
 * Handler for the end of a paragraph movement
 */
IMPL_LINK( OutlineView, EndMovingHdl, ::Outliner *, pOutliner, void )
{
    OutlineViewPageChangesGuard aGuard(this);

    DBG_ASSERT( isRecordingUndo(), "sd::OutlineView::EndMovingHdl(), model change without undo?!" );

    // look for insertion position via the first paragraph
    Paragraph* pSearchIt = maSelectedParas.empty() ? nullptr : *(maSelectedParas.begin());

    // look for the first of the selected paragraphs in the new ordering
    sal_uInt16 nPosNewOrder = 0;
    sal_Int32 nParaPos = 0;
    Paragraph*  pPara = pOutliner->GetParagraph( 0 );
    Paragraph*  pPrev = nullptr;
    while (pPara && pPara != pSearchIt)
    {
        if( ::Outliner::HasParaFlag(pPara, ParaFlag::ISPAGE) )
        {
            nPosNewOrder++;
            pPrev = pPara;
        }
        pPara = pOutliner->GetParagraph( ++nParaPos );
    }

    sal_uInt16 nPos = nPosNewOrder;     // don't change nPosNewOrder
    if (nPos == 0)
    {
        nPos = sal_uInt16(-1);          // insert before the first page
    }
    else
    {
        // look for the predecessor in the old ordering
        std::vector<Paragraph*>::const_iterator it = std::find(maOldParaOrder.begin(),
                                                               maOldParaOrder.end(),
                                                               pPrev);

        if (it != maOldParaOrder.end())
            nPos = static_cast<sal_uInt16>(it-maOldParaOrder.begin());
        else
            nPos = 0xffff;

        DBG_ASSERT(nPos != 0xffff, "Paragraph not found");
    }

    mrDoc.MovePages(nPos);

    // deselect the pages again
    sal_uInt16 nPageCount = static_cast<sal_uInt16>(maSelectedParas.size());
    while (nPageCount)
    {
        SdPage* pPage = mrDoc.GetSdPage(nPosNewOrder, PageKind::Standard);
        pPage->SetSelected(false);
        nPosNewOrder++;
        nPageCount--;
    }

    pOutliner->UpdateFields();

    maSelectedParas.clear();
    maOldParaOrder.clear();
}

/**
 * Look for the title text object in one page of the model
 */
SdrTextObj* OutlineView::GetTitleTextObject(SdrPage const * pPage)
{
    SdrTextObj*     pResult      = nullptr;

    for (const rtl::Reference<SdrObject>& pObject : *pPage)
    {
        if (pObject->GetObjInventor() == SdrInventor::Default &&
            pObject->GetObjIdentifier() == SdrObjKind::TitleText)
        {
            pResult = static_cast<SdrTextObj*>(pObject.get());
            break;
        }
    }
    return pResult;
}

/**
 * Look for the outline text object in one page of the model
 */
SdrTextObj* OutlineView::GetOutlineTextObject(SdrPage const * pPage)
{
    SdrTextObj*     pResult      = nullptr;

    for (const rtl::Reference<SdrObject>& pObject : *pPage)
    {
        if (pObject->GetObjInventor() == SdrInventor::Default &&
            pObject->GetObjIdentifier() == SdrObjKind::OutlineText)
        {
            pResult = static_cast<SdrTextObj*>(pObject.get());
            break;
        }
    }
    return pResult;
}

SdrTextObj* OutlineView::CreateTitleTextObject(SdPage* pPage)
{
    DBG_ASSERT( GetTitleTextObject(pPage) == nullptr, "sd::OutlineView::CreateTitleTextObject(), there is already a title text object!" );

    if( pPage->GetAutoLayout() == AUTOLAYOUT_NONE )
    {
        // simple case
        pPage->SetAutoLayout( AUTOLAYOUT_TITLE_ONLY, true );
    }
    else
    {
        // we already have a layout with a title but the title
        // object was deleted, create a new one
        pPage->InsertAutoLayoutShape( nullptr, PresObjKind::Title, false, pPage->GetTitleRect(), true );
    }

    return GetTitleTextObject(pPage);
}

SdrTextObj* OutlineView::CreateOutlineTextObject(SdPage* pPage)
{
    DBG_ASSERT( GetOutlineTextObject(pPage) == nullptr, "sd::OutlineView::CreateOutlineTextObject(), there is already a layout text object!" );

    AutoLayout eNewLayout = pPage->GetAutoLayout();
    switch( eNewLayout )
    {
    case AUTOLAYOUT_NONE:
    case AUTOLAYOUT_TITLE_ONLY:
    case AUTOLAYOUT_TITLE:  eNewLayout = AUTOLAYOUT_TITLE_CONTENT; break;

    case AUTOLAYOUT_CHART:  eNewLayout = AUTOLAYOUT_CHARTTEXT; break;

    case AUTOLAYOUT_ORG:
    case AUTOLAYOUT_TAB:
    case AUTOLAYOUT_OBJ:    eNewLayout = AUTOLAYOUT_OBJTEXT; break;
    default:
        break;
    }

    if( eNewLayout != pPage->GetAutoLayout() )
    {
        pPage->SetAutoLayout( eNewLayout, true );
    }
    else
    {
        // we already have a layout with a text but the text
        // object was deleted, create a new one
        pPage->InsertAutoLayoutShape( nullptr,
                                      PresObjKind::Outline,
                                      false, pPage->GetLayoutRect(), true );
    }

    return GetOutlineTextObject(pPage);
}

/** updates draw model with all changes from outliner model */
void OutlineView::PrepareClose()
{
    ::sd::UndoManager* pDocUndoMgr = dynamic_cast<sd::UndoManager*>(mpDocSh->GetUndoManager());
    if (pDocUndoMgr != nullptr)
        pDocUndoMgr->SetLinkedUndoManager(nullptr);

    mrOutliner.GetUndoManager().Clear();

    BegUndo(SdResId(STR_UNDO_CHANGE_TITLE_AND_LAYOUT));
    UpdateDocument();
    EndUndo();
    mrDoc.SetSelected(GetActualPage(), true);
}

/**
 * Set attributes of the selected text
 */
bool OutlineView::SetAttributes(const SfxItemSet& rSet, bool /*bSlide*/, bool /*bReplaceAll*/, bool /*bMaster*/)
{
    bool bOk = false;

    OutlinerView* pOlView = GetViewByWindow(mrOutlineViewShell.GetActiveWindow());

    if (pOlView)
    {
        pOlView->SetAttribs(rSet);
        bOk = true;
    }

    mrOutlineViewShell.Invalidate (SID_PREVIEW_STATE);

    return bOk;
}

/**
 * Get attributes of the selected text
 */
void OutlineView::GetAttributes( SfxItemSet& rTargetSet, bool ) const
{
    OutlinerView* pOlView = GetViewByWindow(
                                mrOutlineViewShell.GetActiveWindow());
    assert(pOlView && "No OutlinerView found");

    rTargetSet.Put( pOlView->GetAttribs(), false );
}

/** creates outliner model from draw model */
void OutlineView::FillOutliner()
{
    mrOutliner.GetUndoManager().Clear();
    mrOutliner.EnableUndo(false);
    ResetLinks();
    const bool bPrevUpdateLayout = mrOutliner.SetUpdateLayout(false);

    Paragraph* pTitleToSelect = nullptr;
    sal_uInt16 nPageCount = mrDoc.GetSdPageCount(PageKind::Standard);

    // fill outliner with paragraphs from slides title & (outlines|subtitles)
    for (sal_uInt16 nPage = 0; nPage < nPageCount; nPage++)
    {
        SdPage*     pPage = mrDoc.GetSdPage(nPage, PageKind::Standard);
        Paragraph * pPara = nullptr;

        // take text from title shape
        SdrTextObj* pTO = GetTitleTextObject(pPage);
        if(pTO && !(pTO->IsEmptyPresObj()))
        {
            OutlinerParaObject* pOPO = pTO->GetOutlinerParaObject();
            if (pOPO)
            {
                bool bVertical = pOPO->IsEffectivelyVertical();
                pOPO->SetVertical( false );
                mrOutliner.AddText(*pOPO);
                pOPO->SetVertical( bVertical );
                pPara = mrOutliner.GetParagraph( mrOutliner.GetParagraphCount()-1 );
            }
        }

        if( pPara == nullptr ) // no title, insert an empty paragraph
        {
            pPara = mrOutliner.Insert(OUString());
            mrOutliner.SetDepth(pPara, -1);

            // do not apply hard attributes from the previous paragraph
            mrOutliner.SetParaAttribs( mrOutliner.GetAbsPos(pPara),
                                       mrOutliner.GetEmptyItemSet() );

            mrOutliner.SetStyleSheet( mrOutliner.GetAbsPos( pPara ), pPage->GetStyleSheetForPresObj( PresObjKind::Title ) );
        }

        mrOutliner.SetParaFlag( pPara, ParaFlag::ISPAGE );

        sal_Int32 nPara = mrOutliner.GetAbsPos( pPara );

        UpdateParagraph( nPara );

        // remember paragraph of currently selected page
        if (pPage->IsSelected())
            pTitleToSelect = pPara;

        // take text from subtitle or outline
        pTO = static_cast<SdrTextObj*>(pPage->GetPresObj(PresObjKind::Text));
        const bool bSubTitle = pTO != nullptr;

        if (!pTO) // if no subtile found, try outline
            pTO = GetOutlineTextObject(pPage);

        if(pTO && !(pTO->IsEmptyPresObj())) // found some text
        {
            OutlinerParaObject* pOPO = pTO->GetOutlinerParaObject();
            if (pOPO)
            {
                sal_Int32 nParaCount1 = mrOutliner.GetParagraphCount();
                bool bVertical = pOPO->IsEffectivelyVertical();
                pOPO->SetVertical( false );
                mrOutliner.AddText(*pOPO);
                pOPO->SetVertical( bVertical );

                sal_Int32 nParaCount2 = mrOutliner.GetParagraphCount();
                for (sal_Int32 n = nParaCount1; n < nParaCount2; n++)
                {
                    if( bSubTitle )
                    {
                        Paragraph* p = mrOutliner.GetParagraph(n);
                        if(p && mrOutliner.GetDepth( n ) > 0 )
                            mrOutliner.SetDepth(p, 0);
                    }

                    UpdateParagraph( n );
                }
            }
        }
    }

    // place cursor at the start
    Paragraph* pFirstPara = mrOutliner.GetParagraph( 0 );
    mpOutlinerViews[0]->Select( pFirstPara );
    mpOutlinerViews[0]->Select( pFirstPara, false );

    // select title of slide that was selected
    if (pTitleToSelect)
        mpOutlinerViews[0]->Select(pTitleToSelect);

    SetLinks();

    mrOutliner.EnableUndo(true);

    mrOutliner.SetUpdateLayout(bPrevUpdateLayout);
}

/**
 * Handler for deleting of level 0 paragraphs (pages): Warning
 */
IMPL_LINK_NOARG(OutlineView, RemovingPagesHdl, OutlinerView*, bool)
{
    sal_Int32 nNumOfPages = mrOutliner.GetSelPageCount();

    if (nNumOfPages > PROCESS_WITH_PROGRESS_THRESHOLD)
    {
        mnPagesToProcess = nNumOfPages;
        mnPagesProcessed  = 0;
    }

    if (mnPagesToProcess)
    {
        mpProgress.reset( new SfxProgress( GetDocSh(), SdResId(STR_DELETE_PAGES), mnPagesToProcess ) );
    }
    mrOutliner.UpdateFields();

    return true;
}

/**
 * Handler for indenting level 0 paragraphs (pages): Warning
 */
IMPL_LINK( OutlineView, IndentingPagesHdl, OutlinerView *, pOutlinerView, bool )
{
    return RemovingPagesHdl(pOutlinerView);
}

/** returns the first slide that is selected in the outliner or where
    the cursor is located */
SdPage* OutlineView::GetActualPage()
{
    ::sd::Window* pWin = mrOutlineViewShell.GetActiveWindow();
    OutlinerView* pActiveView = GetViewByWindow(pWin);

    std::vector<Paragraph*> aSelList;
    pActiveView->CreateSelectionList(aSelList);

    Paragraph *pPar = aSelList.empty() ? nullptr : *(aSelList.begin());
    SdPage* pCurrent = GetPageForParagraph(pPar);

    DBG_ASSERT( pCurrent ||
                (mpDocSh->GetUndoManager() && static_cast< sd::UndoManager *>(mpDocSh->GetUndoManager())->IsDoing()) ||
                maDragAndDropModelGuard,
                "sd::OutlineView::GetActualPage(), no current page?" );

    if( pCurrent )
        return pCurrent;

    return mrDoc.GetSdPage( 0, PageKind::Standard );
}

SdPage* OutlineView::GetPageForParagraph( Paragraph* pPara )
{
    if( !::Outliner::HasParaFlag(pPara,ParaFlag::ISPAGE) )
        pPara = GetPrevTitle(pPara);

    sal_uInt32 nPageToSelect = 0;
    while(pPara)
    {
        pPara = GetPrevTitle(pPara);
        if(pPara)
            nPageToSelect++;
    }

    if( nPageToSelect < static_cast<sal_uInt32>(mrDoc.GetSdPageCount( PageKind::Standard )) )
        return mrDoc.GetSdPage( static_cast<sal_uInt16>(nPageToSelect), PageKind::Standard );

    return nullptr;
}

Paragraph* OutlineView::GetParagraphForPage( ::Outliner const & rOutl, SdPage const * pPage )
{
    // get the number of paragraphs with ident 0 we need to skip before
    // we find the actual page
    sal_uInt16 nPageNum = pPage->GetPageNum();
    assert(nPageNum > 0);
    sal_uInt32 nPagesToSkip = (nPageNum - 1) >> 1;

    sal_Int32 nParaPos = 0;
    Paragraph* pPara = rOutl.GetParagraph( 0 );
    while( pPara )
    {
        // if this paragraph is a page...
        if( ::Outliner::HasParaFlag(pPara,ParaFlag::ISPAGE) )
        {
            // see if we already skipped enough pages
            if( 0 == nPagesToSkip )
                break;  // and if so, end the loop

            // we skipped another page
            nPagesToSkip--;
        }

        // get next paragraph
        pPara = mrOutliner.GetParagraph( ++nParaPos );
    }

    return pPara;
}

/** selects the paragraph for the given page at the outliner view*/
void OutlineView::SetActualPage( SdPage const * pActual )
{
    if( pActual && mrOutliner.GetIgnoreCurrentPageChangesLevel()==0 && !mbFirstPaint)
    {
        // if we found a paragraph, select its text at the outliner view
        Paragraph* pPara = GetParagraphForPage( mrOutliner, pActual );
        if( pPara )
            mpOutlinerViews[0]->Select( pPara );
    }
}

/**
 * Get StyleSheet from the selection
 */
SfxStyleSheet* OutlineView::GetStyleSheet() const
{
    ::sd::Window* pActWin = mrOutlineViewShell.GetActiveWindow();
    OutlinerView* pOlView = GetViewByWindow(pActWin);
    SfxStyleSheet* pResult = pOlView->GetStyleSheet();
    return pResult;
}

/**
 * Mark pages as selected / not selected
 */
void OutlineView::SetSelectedPages()
{
    // list of selected title paragraphs
    std::vector<Paragraph*> aSelParas;
    mpOutlinerViews[0]->CreateSelectionList(aSelParas);

    std::erase_if(aSelParas,
        [](const Paragraph* pPara) { return !Outliner::HasParaFlag(pPara, ParaFlag::ISPAGE); });

    // select the pages belonging to the paragraphs on level 0 to select
    sal_uInt16 nPos = 0;
    sal_Int32 nParaPos = 0;
    Paragraph *pPara = mrOutliner.GetParagraph( 0 );
    std::vector<Paragraph*>::const_iterator fiter;

    while(pPara)
    {
        if( ::Outliner::HasParaFlag(pPara, ParaFlag::ISPAGE) )                     // one page
        {
            SdPage* pPage = mrDoc.GetSdPage(nPos, PageKind::Standard);
            DBG_ASSERT(pPage!=nullptr,
                "Trying to select non-existing page OutlineView::SetSelectedPages()");

            if (pPage)
            {
                fiter = std::find(aSelParas.begin(),aSelParas.end(),pPara);
                pPage->SetSelected(fiter != aSelParas.end());
            }

            nPos++;
        }

        pPara = mrOutliner.GetParagraph( ++nParaPos );
    }
}

/**
 * Set new links
 */
void OutlineView::SetLinks()
{
    // set notification links
    mrOutliner.SetParaInsertedHdl(LINK(this, OutlineView, ParagraphInsertedHdl));
    mrOutliner.SetParaRemovingHdl(LINK(this, OutlineView, ParagraphRemovingHdl));
    mrOutliner.SetDepthChangedHdl(LINK(this, OutlineView, DepthChangedHdl));
    mrOutliner.SetBeginMovingHdl(LINK(this, OutlineView, BeginMovingHdl));
    mrOutliner.SetEndMovingHdl(LINK(this, OutlineView, EndMovingHdl));
    mrOutliner.SetRemovingPagesHdl(LINK(this, OutlineView, RemovingPagesHdl));
    mrOutliner.SetIndentingPagesHdl(LINK(this, OutlineView, IndentingPagesHdl));
    mrOutliner.SetStatusEventHdl(LINK(this, OutlineView, StatusEventHdl));
    mrOutliner.SetBeginDropHdl(LINK(this,OutlineView, BeginDropHdl));
    mrOutliner.SetEndDropHdl(LINK(this,OutlineView, EndDropHdl));
    mrOutliner.SetPaintFirstLineHdl(LINK(this,OutlineView,PaintingFirstLineHdl));
    mrOutliner.SetBeginPasteOrDropHdl(LINK(this,OutlineView, BeginPasteOrDropHdl));
    mrOutliner.SetEndPasteOrDropHdl(LINK(this,OutlineView, EndPasteOrDropHdl));
}

/**
 * Restore old links
 */
void OutlineView::ResetLinks() const
{
    mrOutliner.SetParaInsertedHdl(Link<::Outliner::ParagraphHdlParam,void>());
    mrOutliner.SetParaRemovingHdl(Link<::Outliner::ParagraphHdlParam,void>());
    mrOutliner.SetDepthChangedHdl(Link<::Outliner::DepthChangeHdlParam,void>());
    mrOutliner.SetBeginMovingHdl(Link<::Outliner*,void>());
    mrOutliner.SetEndMovingHdl(Link<::Outliner*,void>());
    mrOutliner.SetStatusEventHdl(Link<EditStatus&,void>());
    mrOutliner.SetRemovingPagesHdl(Link<OutlinerView*,bool>());
    mrOutliner.SetIndentingPagesHdl(Link<OutlinerView*,bool>());
    mrOutliner.SetDrawPortionHdl(Link<DrawPortionInfo*,void>());
    mrOutliner.SetBeginPasteOrDropHdl(Link<PasteOrDropInfos*,void>());
    mrOutliner.SetEndPasteOrDropHdl(Link<PasteOrDropInfos*,void>());
}

sal_Int8 OutlineView::AcceptDrop( const AcceptDropEvent&, DropTargetHelper&, SdrLayerID)
{
    return DND_ACTION_NONE;
}

sal_Int8 OutlineView::ExecuteDrop( const ExecuteDropEvent&, ::sd::Window*, sal_uInt16, SdrLayerID)
{
    return DND_ACTION_NONE;
}

// Re-implement GetScriptType for this view to get correct results
SvtScriptType OutlineView::GetScriptType() const
{
    SvtScriptType nScriptType = ::sd::View::GetScriptType();

    std::optional<OutlinerParaObject> pTempOPObj = mrOutliner.CreateParaObject();
    if(pTempOPObj)
    {
        nScriptType = pTempOPObj->GetTextObject().GetScriptType();
    }

    return nScriptType;
}

void OutlineView::onUpdateStyleSettings( bool bForceUpdate /* = false */ )
{
    svtools::ColorConfig aColorConfig;
    const Color aDocColor( aColorConfig.GetColorValue( svtools::DOCCOLOR ).nColor );
    if( !(bForceUpdate || (maDocColor != aDocColor)) )
        return;

    sal_uInt16 nView;
    for( nView = 0; nView < MAX_OUTLINERVIEWS; nView++ )
    {
        if (mpOutlinerViews[nView] != nullptr)
        {
            mpOutlinerViews[nView]->SetBackgroundColor( aDocColor );

            vcl::Window* pWindow = mpOutlinerViews[nView]->GetWindow();

            if( pWindow )
                pWindow->SetBackground( Wallpaper( aDocColor ) );

        }
    }

    mrOutliner.SetBackgroundColor( aDocColor );

    maDocColor = aDocColor;
}

IMPL_LINK_NOARG(OutlineView, AppEventListenerHdl, VclSimpleEvent&, void)
{
    onUpdateStyleSettings(false);
}

IMPL_LINK(OutlineView, EventMultiplexerListener, ::sd::tools::EventMultiplexerEvent&, rEvent, void)
{
    switch (rEvent.meEventId)
    {
        case EventMultiplexerEventId::CurrentPageChanged:
            SetActualPage(mrOutlineViewShell.GetActualPage());
            break;

        case EventMultiplexerEventId::PageOrder:
            if (mrOutliner.GetIgnoreCurrentPageChangesLevel()==0)
            {
                if (((mrDoc.GetPageCount()-1)%2) == 0)
                {
                    mrOutliner.Clear();
                    FillOutliner();
                    ::sd::Window* pWindow = mrOutlineViewShell.GetActiveWindow();
                    if (pWindow != nullptr)
                        pWindow->Invalidate();
                }
            }
            break;

        default: break;
    }
}

void OutlineView::IgnoreCurrentPageChanges (bool bIgnoreChanges)
{
    if (bIgnoreChanges)
        mrOutliner.IncreIgnoreCurrentPageChangesLevel();
    else
        mrOutliner.DecreIgnoreCurrentPageChangesLevel();
}

/** call this method before you do anything that can modify the outliner
    and or the drawing document model. It will create needed undo actions */
void OutlineView::BeginModelChange()
{
    mrOutliner.GetUndoManager().EnterListAction(u""_ustr, u""_ustr, 0, mrOutlineViewShell.GetViewShellBase().GetViewShellId());
    BegUndo(SdResId(STR_UNDO_CHANGE_TITLE_AND_LAYOUT));
}

/** call this method after BeginModelChange(), when all possible model
    changes are done. */
void OutlineView::EndModelChange()
{
    UpdateDocument();

    SfxUndoManager* pDocUndoMgr = mpDocSh->GetUndoManager();

    bool bHasUndoActions = pDocUndoMgr->GetUndoActionCount() != 0;

    EndUndo();

    DBG_ASSERT( bHasUndoActions == (mrOutliner.GetUndoManager().GetUndoActionCount() != 0), "sd::OutlineView::EndModelChange(), undo actions not in sync!" );

    mrOutliner.GetUndoManager().LeaveListAction();

    if( bHasUndoActions && mrOutliner.GetEditEngine().HasTriedMergeOnLastAddUndo() )
        TryToMergeUndoActions();

    mrOutlineViewShell.Invalidate( SID_UNDO );
    mrOutlineViewShell.Invalidate( SID_REDO );
}

/** updates all changes in the outliner model to the draw model */
void OutlineView::UpdateDocument()
{
    OutlineViewPageChangesGuard aGuard(this);

    const sal_uInt32 nPageCount = mrDoc.GetSdPageCount(PageKind::Standard);
    Paragraph* pPara = mrOutliner.GetParagraph( 0 );
    sal_uInt32 nPage;
    for (nPage = 0; nPage < nPageCount; nPage++)
    {
        SdPage* pPage = mrDoc.GetSdPage( static_cast<sal_uInt16>(nPage), PageKind::Standard);
        mrDoc.SetSelected(pPage, false);

        mrOutlineViewShell.UpdateTitleObject( pPage, pPara );
        mrOutlineViewShell.UpdateOutlineObject( pPage, pPara );

        if( pPara )
            pPara = GetNextTitle(pPara);
    }

    DBG_ASSERT( pPara == nullptr, "sd::OutlineView::UpdateDocument(), slides are out of sync, creating missing ones" );
    while( pPara )
    {
        SdPage* pPage = InsertSlideForParagraph( pPara );
        mrDoc.SetSelected(pPage, false);

        mrOutlineViewShell.UpdateTitleObject( pPage, pPara );
        mrOutlineViewShell.UpdateOutlineObject( pPage, pPara );

        pPara = GetNextTitle(pPara);
    }
}

/** merge edit engine undo actions if possible */
void OutlineView::TryToMergeUndoActions()
{
    SfxUndoManager& rOutlineUndo = mrOutliner.GetUndoManager();
    if( rOutlineUndo.GetUndoActionCount() <= 1 )
        return;

    SfxListUndoAction* pListAction = dynamic_cast< SfxListUndoAction* >( rOutlineUndo.GetUndoAction() );
    SfxListUndoAction* pPrevListAction = dynamic_cast< SfxListUndoAction* >( rOutlineUndo.GetUndoAction(1) );
    if( !(pListAction && pPrevListAction) )
        return;

    // find the top EditUndo action in the top undo action list
    size_t nAction = pListAction->maUndoActions.size();
    EditUndo* pEditUndo = nullptr;
    while( !pEditUndo && nAction )
    {
        pEditUndo = dynamic_cast< EditUndo* >(pListAction->GetUndoAction(--nAction));
    }

    sal_uInt16 nEditPos = nAction; // we need this later to remove the merged undo actions

    // make sure it is the only EditUndo action in the top undo list
    while( pEditUndo && nAction )
    {
        if( dynamic_cast< EditUndo* >(pListAction->GetUndoAction(--nAction)) )
            pEditUndo = nullptr;
    }

    // do we have one and only one EditUndo action in the top undo list?
    if( !pEditUndo )
        return;

    // yes, see if we can merge it with the prev undo list

    nAction = pPrevListAction->maUndoActions.size();
    EditUndo* pPrevEditUndo = nullptr;
    while( !pPrevEditUndo && nAction )
        pPrevEditUndo = dynamic_cast< EditUndo* >(pPrevListAction->GetUndoAction(--nAction));

    if( !(pPrevEditUndo && pPrevEditUndo->Merge( pEditUndo )) )
        return;

    // ok we merged the only EditUndo of the top undo list with
    // the top EditUndo of the previous undo list

    // first remove the merged undo action
    assert( pListAction->GetUndoAction(nEditPos) == pEditUndo &&
        "sd::OutlineView::TryToMergeUndoActions(), wrong edit pos!" );
    pListAction->Remove(nEditPos);

    if ( !pListAction->maUndoActions.empty() )
    {
        // now we have to move all remaining doc undo actions from the top undo
        // list to the previous undo list and remove the top undo list

        size_t nCount = pListAction->maUndoActions.size();
        size_t nDestAction = pPrevListAction->maUndoActions.size();
        while( nCount-- )
        {
            std::unique_ptr<SfxUndoAction> pTemp = pListAction->Remove(0);
            pPrevListAction->Insert( std::move(pTemp), nDestAction++ );
        }
        pPrevListAction->nCurUndoAction = pPrevListAction->maUndoActions.size();
    }

    rOutlineUndo.RemoveLastUndoAction();
}

IMPL_LINK(OutlineView, PaintingFirstLineHdl, PaintFirstLineInfo*, pInfo, void)
{
    if( !pInfo )
        return;

    Paragraph* pPara = mrOutliner.GetParagraph( pInfo->mnPara );
    EditEngine& rEditEngine = const_cast< EditEngine& >( mrOutliner.GetEditEngine() );

    Size aImageSize( pInfo->mpOutDev->PixelToLogic( maSlideImage.GetSizePixel()  ) );
    Size aOffset( 100, 100 );

    // paint slide number
    if( !(pPara && ::Outliner::HasParaFlag(pPara,ParaFlag::ISPAGE)) )
        return;

    ::tools::Long nPage = 0; // todo, printing??
    for ( sal_Int32 n = 0; n <= pInfo->mnPara; n++ )
    {
        Paragraph* p = mrOutliner.GetParagraph( n );
        if ( ::Outliner::HasParaFlag(p,ParaFlag::ISPAGE) )
            nPage++;
    }

    ::tools::Long nBulletHeight = static_cast<::tools::Long>(mrOutliner.GetLineHeight( pInfo->mnPara ));
    ::tools::Long nFontHeight = 0;
    if ( !rEditEngine.IsFlatMode() )
    {
        nFontHeight = nBulletHeight / 5;
    }
    else
    {
        nFontHeight = (nBulletHeight * 10) / 25;
    }

    Size aFontSz( 0, nFontHeight );

    Size aOutSize( 2000, nBulletHeight );

    const float fImageHeight = (static_cast<float>(aOutSize.Height()) * float(4)) / float(7);
    if (aImageSize.Width() != 0)
    {
        const float fImageRatio  = static_cast<float>(aImageSize.Height()) / static_cast<float>(aImageSize.Width());
        aImageSize.setWidth( static_cast<::tools::Long>( fImageRatio * fImageHeight ) );
    }
    aImageSize.setHeight( static_cast<::tools::Long>(fImageHeight) );

    Point aImagePos( pInfo->mrStartPos );
    aImagePos.AdjustX(aOutSize.Width() - aImageSize.Width() - aOffset.Width() ) ;
    aImagePos.AdjustY((aOutSize.Height() - aImageSize.Height()) / 2 );

    pInfo->mpOutDev->DrawImage( aImagePos, aImageSize, maSlideImage );

    const bool bVertical = mrOutliner.IsVertical();
    const bool bRightToLeftPara = rEditEngine.IsRightToLeft( pInfo->mnPara );

    LanguageType eLang = rEditEngine.GetDefaultLanguage();

    Point aTextPos( aImagePos.X() - aOffset.Width(), pInfo->mrStartPos.Y() );
    vcl::Font aNewFont( OutputDevice::GetDefaultFont( DefaultFontType::SANS_UNICODE, eLang, GetDefaultFontFlags::NONE ) );
    aNewFont.SetFontSize( aFontSz );
    aNewFont.SetVertical( bVertical );
    aNewFont.SetOrientation( Degree10(bVertical ? 2700 : 0) );
    aNewFont.SetColor( COL_AUTO );
    pInfo->mpOutDev->SetFont( aNewFont );
    OUString aPageText = OUString::number( nPage );
    Size aTextSz;
    aTextSz.setWidth( pInfo->mpOutDev->GetTextWidth( aPageText ) );
    aTextSz.setHeight( pInfo->mpOutDev->GetTextHeight() );
    if ( !bVertical )
    {
        aTextPos.AdjustY((aOutSize.Height() - aTextSz.Height()) / 2 );
        if ( !bRightToLeftPara )
        {
            aTextPos.AdjustX( -(aTextSz.Width()) );
        }
        else
        {
            aTextPos.AdjustX(aTextSz.Width() );
        }
    }
    else
    {
        aTextPos.AdjustY( -(aTextSz.Width()) );
        aTextPos.AdjustX(nBulletHeight / 2 );
    }
    pInfo->mpOutDev->DrawText( aTextPos, aPageText );
}

void OutlineView::UpdateParagraph( sal_Int32 nPara )
{
    SfxItemSet aNewAttrs2( mrOutliner.GetParaAttribs( nPara ) );
    aNewAttrs2.Put( maLRSpaceItem );
    mrOutliner.SetParaAttribs( nPara, aNewAttrs2 );
}

void OutlineView::OnBeginPasteOrDrop( PasteOrDropInfos* /*pInfo*/ )
{
}

/** this is called after a paste or drop operation, make sure that the newly inserted paragraphs
    get the correct style sheet and new slides are inserted. */
void OutlineView::OnEndPasteOrDrop( PasteOrDropInfos* pInfo )
{
    SdPage* pPage = nullptr;
    SfxStyleSheetBasePool* pStylePool = GetDoc().GetStyleSheetPool();

    for( sal_Int32 nPara = pInfo->nStartPara; nPara <= pInfo->nEndPara; nPara++ )
    {
        Paragraph* pPara = mrOutliner.GetParagraph( nPara );

        bool bPage = ::Outliner::HasParaFlag( pPara, ParaFlag::ISPAGE  );

        if( !bPage )
        {
            SdStyleSheet* pStyleSheet = dynamic_cast< SdStyleSheet* >( mrOutliner.GetStyleSheet( nPara ) );
            if( pStyleSheet )
            {
                if ( pStyleSheet->GetApiName() == "title" )
                    bPage = true;
            }
        }

        if( !pPara )
            continue; // fatality!?

        if( bPage && (nPara != pInfo->nStartPara) )
        {
            // insert new slide for this paragraph
            pPage = InsertSlideForParagraph( pPara );
        }
        else
        {
            // newly inserted non page paragraphs get the outline style
            if( !pPage )
                pPage = GetPageForParagraph( pPara );

            if( pPage )
            {
                SfxStyleSheet* pStyle = pPage->GetStyleSheetForPresObj( bPage ? PresObjKind::Title : PresObjKind::Outline );

                if( !bPage )
                {
                    const sal_Int16 nDepth = mrOutliner.GetDepth( nPara );
                    if( nDepth > 0 )
                    {
                        OUString aStyleSheetName = pStyle->GetName();
                        if (!aStyleSheetName.isEmpty())
                            aStyleSheetName = aStyleSheetName.copy(0, aStyleSheetName.getLength() - 1);
                        aStyleSheetName += OUString::number( nDepth );
                        pStyle = static_cast<SfxStyleSheet*>( pStylePool->Find( aStyleSheetName, pStyle->GetFamily() ) );
                        DBG_ASSERT( pStyle, "sd::OutlineView::OnEndPasteOrDrop(), Style not found!" );
                    }
                }

                mrOutliner.SetStyleSheet( nPara, pStyle );
            }

            UpdateParagraph( nPara );
        }
    }
}


OutlineViewModelChangeGuard::OutlineViewModelChangeGuard( OutlineView& rView )
: mrView( rView )
{
    mrView.BeginModelChange();
}

OutlineViewModelChangeGuard::~OutlineViewModelChangeGuard() COVERITY_NOEXCEPT_FALSE
{
    mrView.EndModelChange();
}


OutlineViewPageChangesGuard::OutlineViewPageChangesGuard( OutlineView* pView )
: mpView( pView )
{
    if( mpView )
        mpView->IgnoreCurrentPageChanges( true );
}

OutlineViewPageChangesGuard::~OutlineViewPageChangesGuard()
{
    if( mpView )
        mpView->IgnoreCurrentPageChanges( false );
}

} // end of namespace sd

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