/* -*- 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 "LayoutMenu.hxx"

#include <app.hrc>
#include <drawdoc.hxx>
#include <framework/FrameworkHelper.hxx>
#include <strings.hrc>
#include <helpids.h>
#include <pres.hxx>
#include <sdmod.hxx>

#include <sdpage.hxx>
#include <sdresid.hxx>
#include <unokywds.hxx>
#include <bitmaps.hlst>
#include <tools/gen.hxx>
#include <tools/SlotStateListener.hxx>
#include <DrawController.hxx>
#include <DrawDocShell.hxx>
#include <DrawViewShell.hxx>
#include <EventMultiplexer.hxx>
#include <SlideSorterViewShell.hxx>
#include <ViewShellBase.hxx>
#include <sfx2/sidebar/Theme.hxx>
#include <sal/log.hxx>

#include <comphelper/processfactory.hxx>
#include <sfx2/dispatch.hxx>
#include <sfx2/request.hxx>
#include <sfx2/viewfrm.hxx>
#include <svl/languageoptions.hxx>
#include <svl/stritem.hxx>
#include <svl/intitem.hxx>
#include <vcl/commandevent.hxx>
#include <vcl/image.hxx>
#include <vcl/weldutils.hxx>
#include <xmloff/autolayout.hxx>

#include <com/sun/star/drawing/framework/XControllerManager.hpp>
#include <com/sun/star/drawing/framework/XView.hpp>
#include <com/sun/star/drawing/framework/ResourceId.hpp>

#include <vector>

using namespace ::com::sun::star;
using namespace ::com::sun::star::text;
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::drawing::framework;
using namespace ::sd::slidesorter;
using ::sd::framework::FrameworkHelper;

namespace sd::sidebar {

namespace {

struct snewfoil_value_info
{
    const char* msBmpResId;
    const char* mpStrResId;
    WritingMode meWritingMode;
    AutoLayout maAutoLayout;
};

}

const snewfoil_value_info notes[] =
{
    {BMP_FOILN_01, STR_AUTOLAYOUT_NOTES, WritingMode_LR_TB,
     AUTOLAYOUT_NOTES},
    {"", nullptr, WritingMode_LR_TB, AUTOLAYOUT_NONE},
};

const snewfoil_value_info handout[] =
{
    {BMP_FOILH_01, STR_AUTOLAYOUT_HANDOUT1, WritingMode_LR_TB,
     AUTOLAYOUT_HANDOUT1},
    {BMP_FOILH_02, STR_AUTOLAYOUT_HANDOUT2, WritingMode_LR_TB,
     AUTOLAYOUT_HANDOUT2},
    {BMP_FOILH_03, STR_AUTOLAYOUT_HANDOUT3, WritingMode_LR_TB,
     AUTOLAYOUT_HANDOUT3},
    {BMP_FOILH_04, STR_AUTOLAYOUT_HANDOUT4, WritingMode_LR_TB,
     AUTOLAYOUT_HANDOUT4},
    {BMP_FOILH_06, STR_AUTOLAYOUT_HANDOUT6, WritingMode_LR_TB,
     AUTOLAYOUT_HANDOUT6},
    {BMP_FOILH_09, STR_AUTOLAYOUT_HANDOUT9, WritingMode_LR_TB,
     AUTOLAYOUT_HANDOUT9},
    {"", nullptr, WritingMode_LR_TB, AUTOLAYOUT_NONE},
};

const snewfoil_value_info standard[] =
{
    {BMP_LAYOUT_EMPTY, STR_AUTOLAYOUT_NONE, WritingMode_LR_TB,        AUTOLAYOUT_NONE},
    {BMP_LAYOUT_HEAD03, STR_AUTOLAYOUT_TITLE, WritingMode_LR_TB,       AUTOLAYOUT_TITLE},
    {BMP_LAYOUT_HEAD02, STR_AUTOLAYOUT_CONTENT, WritingMode_LR_TB,        AUTOLAYOUT_TITLE_CONTENT},
    {BMP_LAYOUT_HEAD02A, STR_AUTOLAYOUT_2CONTENT, WritingMode_LR_TB,       AUTOLAYOUT_TITLE_2CONTENT},
    {BMP_LAYOUT_HEAD01, STR_AUTOLAYOUT_ONLY_TITLE, WritingMode_LR_TB,  AUTOLAYOUT_TITLE_ONLY},
    {BMP_LAYOUT_TEXTONLY, STR_AUTOLAYOUT_ONLY_TEXT, WritingMode_LR_TB,   AUTOLAYOUT_ONLY_TEXT},
    {BMP_LAYOUT_HEAD03B, STR_AUTOLAYOUT_2CONTENT_CONTENT, WritingMode_LR_TB,    AUTOLAYOUT_TITLE_2CONTENT_CONTENT},
    {BMP_LAYOUT_HEAD03C, STR_AUTOLAYOUT_CONTENT_2CONTENT, WritingMode_LR_TB,    AUTOLAYOUT_TITLE_CONTENT_2CONTENT},
    {BMP_LAYOUT_HEAD03A, STR_AUTOLAYOUT_2CONTENT_OVER_CONTENT,WritingMode_LR_TB, AUTOLAYOUT_TITLE_2CONTENT_OVER_CONTENT},
    {BMP_LAYOUT_HEAD02B, STR_AUTOLAYOUT_CONTENT_OVER_CONTENT, WritingMode_LR_TB, AUTOLAYOUT_TITLE_CONTENT_OVER_CONTENT},
    {BMP_LAYOUT_HEAD04, STR_AUTOLAYOUT_4CONTENT, WritingMode_LR_TB,        AUTOLAYOUT_TITLE_4CONTENT},
    {BMP_LAYOUT_HEAD06, STR_AUTOLAYOUT_6CONTENT, WritingMode_LR_TB,    AUTOLAYOUT_TITLE_6CONTENT},

    // vertical
    {BMP_LAYOUT_VERTICAL02, STR_AL_VERT_TITLE_TEXT_CHART, WritingMode_TB_RL, AUTOLAYOUT_VTITLE_VCONTENT_OVER_VCONTENT},
    {BMP_LAYOUT_VERTICAL01, STR_AL_VERT_TITLE_VERT_OUTLINE, WritingMode_TB_RL, AUTOLAYOUT_VTITLE_VCONTENT},
    {BMP_LAYOUT_HEAD02, STR_AL_TITLE_VERT_OUTLINE, WritingMode_TB_RL, AUTOLAYOUT_TITLE_VCONTENT},
    {BMP_LAYOUT_HEAD02A, STR_AL_TITLE_VERT_OUTLINE_CLIPART,   WritingMode_TB_RL, AUTOLAYOUT_TITLE_2VTEXT},
    {"", nullptr, WritingMode_LR_TB, AUTOLAYOUT_NONE}
};

class LayoutValueSet : public ValueSet
{
private:
    LayoutMenu& mrMenu;
public:
    LayoutValueSet(LayoutMenu& rMenu)
        : ValueSet(nullptr)
        , mrMenu(rMenu)
    {
    }

    virtual bool Command(const CommandEvent& rEvent) override
    {
        if (rEvent.GetCommand() == CommandEventId::ContextMenu)
        {
            mrMenu.ShowContextMenu(rEvent.IsMouseEvent() ? &rEvent.GetMousePosPixel() : nullptr);
            return true;
        }
        return false;
    }
};

LayoutMenu::LayoutMenu (
    vcl::Window* pParent,
    ViewShellBase& rViewShellBase,
    const css::uno::Reference<css::ui::XSidebar>& rxSidebar)
    : PanelLayout( pParent, "LayoutPanel", "modules/simpress/ui/layoutpanel.ui", nullptr ),
      mrBase(rViewShellBase),
      mxLayoutValueSet(new LayoutValueSet(*this)),
      mxLayoutValueSetWin(new weld::CustomWeld(*m_xBuilder, "valueset", *mxLayoutValueSet)),
      mbIsMainViewChangePending(false),
      mxSidebar(rxSidebar),
      mbIsDisposed(false)
{
    set_id("sd::LayoutMenu");
    implConstruct( *mrBase.GetDocument()->GetDocSh() );
    SAL_INFO("sd.ui", "created LayoutMenu at " << this);

    mxLayoutValueSet->SetStyle(mxLayoutValueSet->GetStyle() | WB_ITEMBORDER | WB_FLATVALUESET | WB_TABSTOP);

    mxLayoutValueSet->SetColor(sfx2::sidebar::Theme::GetColor(sfx2::sidebar::Theme::Color_PanelBackground));

#ifdef DEBUG
    SetText(OUString("sd:LayoutMenu"));
#endif
    m_pInitialFocusWidget = mxLayoutValueSet->GetDrawingArea();
}

void LayoutMenu::implConstruct( DrawDocShell& rDocumentShell )
{
    OSL_ENSURE( mrBase.GetDocument()->GetDocSh() == &rDocumentShell,
        "LayoutMenu::implConstruct: hmm?" );
    // if this fires, then my assumption that the rDocumentShell parameter to our first ctor is superfluous ...
    (void) rDocumentShell;

    mxLayoutValueSet->SetStyle (
        ( mxLayoutValueSet->GetStyle()  & ~(WB_ITEMBORDER) )
        | WB_TABSTOP
        | WB_MENUSTYLEVALUESET
        | WB_NO_DIRECTSELECT
        );
    mxLayoutValueSet->SetExtraSpacing(2);
    mxLayoutValueSet->SetSelectHdl (LINK(this, LayoutMenu, ClickHandler));
    InvalidateContent();

    Link<::sd::tools::EventMultiplexerEvent&,void> aEventListenerLink (LINK(this,LayoutMenu,EventMultiplexerListener));
    mrBase.GetEventMultiplexer()->AddEventListener(aEventListenerLink);

    Window::SetHelpId(HID_SD_TASK_PANE_PREVIEW_LAYOUTS);
    SetAccessibleName(SdResId(STR_TASKPANEL_LAYOUT_MENU_TITLE));

    Link<const OUString&,void> aStateChangeLink (LINK(this,LayoutMenu,StateChangeHandler));
    mxListener = new ::sd::tools::SlotStateListener(
        aStateChangeLink,
        Reference<frame::XDispatchProvider>(mrBase.GetController()->getFrame(), UNO_QUERY),
        ".uno:VerticalTextState");

    SetSizePixel(GetParent()->GetSizePixel());
    Link<VclWindowEvent&,void> aWindowEventHandlerLink (LINK(this,LayoutMenu,WindowEventHandler));
    GetParent()->AddEventListener(aWindowEventHandlerLink);
}

LayoutMenu::~LayoutMenu()
{
    disposeOnce();
}

void LayoutMenu::dispose()
{
    SAL_INFO("sd.ui", "destroying LayoutMenu at " << this);
    Dispose();
    mxLayoutValueSetWin.reset();
    mxLayoutValueSet.reset();
    PanelLayout::dispose();
}

void LayoutMenu::Dispose()
{
    if (mbIsDisposed)
        return;

    SAL_INFO("sd.ui", "disposing LayoutMenu at " << this);

    mbIsDisposed = true;

    Reference<lang::XComponent> xComponent (mxListener, UNO_QUERY);
    if (xComponent.is())
        xComponent->dispose();

    Clear();
    Link<tools::EventMultiplexerEvent&,void> aLink (LINK(this,LayoutMenu,EventMultiplexerListener));
    mrBase.GetEventMultiplexer()->RemoveEventListener (aLink);

    Link<VclWindowEvent&,void> aWindowEventHandlerLink (LINK(this,LayoutMenu,WindowEventHandler));
    GetParent()->RemoveEventListener(aWindowEventHandlerLink);
}

AutoLayout LayoutMenu::GetSelectedAutoLayout() const
{
    AutoLayout aResult = AUTOLAYOUT_NONE;

    if (!mxLayoutValueSet->IsNoSelection() && mxLayoutValueSet->GetSelectedItemId()!=0)
    {
        AutoLayout* pLayout = static_cast<AutoLayout*>(mxLayoutValueSet->GetItemData(mxLayoutValueSet->GetSelectedItemId()));
        if (pLayout != nullptr)
            aResult = *pLayout;
    }

    return aResult;
}

ui::LayoutSize LayoutMenu::GetHeightForWidth (const sal_Int32 nWidth)
{
    sal_Int32 nPreferredHeight = 200;
    if (mxLayoutValueSet->GetItemCount()>0)
    {
        Image aImage = mxLayoutValueSet->GetItemImage(mxLayoutValueSet->GetItemId(0));
        Size aItemSize = mxLayoutValueSet->CalcItemSizePixel(aImage.GetSizePixel());
        if (nWidth>0 && aItemSize.Width()>0)
        {
            aItemSize.AdjustWidth(8 );
            aItemSize.AdjustHeight(8 );
            int nColumnCount = nWidth / aItemSize.Width();
            if (nColumnCount <= 0)
                nColumnCount = 1;
            else if (nColumnCount > 4)
                nColumnCount = 4;
            int nRowCount = (mxLayoutValueSet->GetItemCount() + nColumnCount-1) / nColumnCount;
            nPreferredHeight = nRowCount * aItemSize.Height();
        }
    }
    return ui::LayoutSize(nPreferredHeight,nPreferredHeight,nPreferredHeight);
}

void LayoutMenu::Resize()
{
    Size aWindowSize = GetOutputSizePixel();
    if (IsVisible() && aWindowSize.Width() > 0)
    {
        // Calculate the number of rows and columns.
        if (mxLayoutValueSet->GetItemCount() > 0)
        {
            Image aImage = mxLayoutValueSet->GetItemImage(mxLayoutValueSet->GetItemId(0));
            Size aItemSize = mxLayoutValueSet->CalcItemSizePixel (
                aImage.GetSizePixel());
            aItemSize.AdjustWidth(8 );
            aItemSize.AdjustHeight(8 );
            int nColumnCount = aWindowSize.Width() / aItemSize.Width();
            if (nColumnCount < 1)
                nColumnCount = 1;
            else if (nColumnCount > 4)
                nColumnCount = 4;

            int nRowCount = CalculateRowCount (aItemSize, nColumnCount);

            mxLayoutValueSet->SetColCount(nColumnCount);
            mxLayoutValueSet->SetLineCount(nRowCount);
        }
    }

    mxLayoutValueSet->Resize();
}

void LayoutMenu::MouseButtonDown (const MouseEvent& rEvent)
{
    // As a preparation for the context menu the item under the mouse is
    // selected.
    if (rEvent.IsRight())
    {
        ReleaseMouse();
        sal_uInt16 nIndex = mxLayoutValueSet->GetItemId(rEvent.GetPosPixel());
        if (nIndex > 0)
            mxLayoutValueSet->SelectItem(nIndex);
    }

    mxLayoutValueSet->MouseButtonDown(rEvent);
}

void LayoutMenu::InsertPageWithLayout (AutoLayout aLayout)
{
    ViewShell* pViewShell = mrBase.GetMainViewShell().get();
    if (pViewShell == nullptr)
        return;

    SfxViewFrame* pViewFrame = mrBase.GetViewFrame();
    if (pViewFrame == nullptr)
        return;

    SfxDispatcher* pDispatcher = pViewFrame->GetDispatcher();
    if (pDispatcher == nullptr)
        return;

    // Call SID_INSERTPAGE with the right arguments.  This is because
    // the popup menu can not call this slot with arguments directly.
    SfxRequest aRequest (CreateRequest(SID_INSERTPAGE, aLayout));
    if (aRequest.GetArgs() != nullptr)
    {
        pDispatcher->Execute(
            SID_INSERTPAGE,
            SfxCallMode::ASYNCHRON | SfxCallMode::RECORD,
            *aRequest.GetArgs());
    }
    UpdateSelection();
}

void LayoutMenu::InvalidateContent()
{
    // Throw away the current set and fill the menu anew according to the
    // current settings (this includes the support for vertical writing.)
    Fill();

    if (mxSidebar.is())
        mxSidebar->requestLayout();

    // set selection inside the control during Impress start up
    UpdateSelection();
}

int LayoutMenu::CalculateRowCount (const Size&, int nColumnCount)
{
    int nRowCount = 0;

    if (mxLayoutValueSet->GetItemCount() > 0 && nColumnCount > 0)
    {
        nRowCount = (mxLayoutValueSet->GetItemCount() + nColumnCount - 1) / nColumnCount;
        //        nRowCount = GetOutputSizePixel().Height() / rItemSize.Height();
        if (nRowCount < 1)
            nRowCount = 1;
    }

    return nRowCount;
}

IMPL_LINK_NOARG(LayoutMenu, ClickHandler, ValueSet*, void)
{
    AssignLayoutToSelectedSlides( GetSelectedAutoLayout() );
}

/** The specified layout is assigned to the current page of the view shell
    in the center pane.
*/
void LayoutMenu::AssignLayoutToSelectedSlides (AutoLayout aLayout)
{
    using namespace ::sd::slidesorter;
    using namespace ::sd::slidesorter::controller;

    do
    {
        // The view shell in the center pane has to be present.
        ViewShell* pMainViewShell = mrBase.GetMainViewShell().get();
        if (pMainViewShell == nullptr)
            break;

        // Determine if the current view is in an invalid master page mode.
        // The handout view is always in master page mode and therefore not
        // invalid.
        bool bMasterPageMode (false);
        switch (pMainViewShell->GetShellType())
        {
            case ViewShell::ST_NOTES:
            case ViewShell::ST_IMPRESS:
            {
                DrawViewShell* pDrawViewShell = static_cast<DrawViewShell*>(pMainViewShell);
                if (pDrawViewShell->GetEditMode() == EditMode::MasterPage)
                    bMasterPageMode = true;
                break;
            }
            default:
                break;
        }
        if (bMasterPageMode)
            break;

        // Get a list of all selected slides and call the SID_MODIFYPAGE
        // slot for all of them.
        ::sd::slidesorter::SharedPageSelection pPageSelection;

        // Get a list of selected pages.
        // First we try to obtain this list from a slide sorter.  This is
        // possible only some of the view shells in the center pane.  When
        // no valid slide sorter is available then ask the main view shell
        // for its current page.
        SlideSorterViewShell* pSlideSorter = nullptr;
        switch (pMainViewShell->GetShellType())
        {
            case ViewShell::ST_IMPRESS:
            case ViewShell::ST_NOTES:
            case ViewShell::ST_SLIDE_SORTER:
                pSlideSorter = SlideSorterViewShell::GetSlideSorter(mrBase);
                break;
            default:
                break;
        }
        if (pSlideSorter != nullptr)
        {
            // There is a slide sorter visible so get the list of selected pages from it.
            pPageSelection = pSlideSorter->GetPageSelection();
        }

        if( (pSlideSorter == nullptr) || !pPageSelection || pPageSelection->empty() )
        {
            // No valid slide sorter available.  Ask the main view shell for
            // its current page.
            pPageSelection = std::make_shared<::sd::slidesorter::SlideSorterViewShell::PageSelection>();
            pPageSelection->push_back(pMainViewShell->GetActualPage());
        }

        if (pPageSelection->empty())
            break;

        for (const auto& rpPage : *pPageSelection)
        {
            if (rpPage == nullptr)
                continue;

            // Call the SID_ASSIGN_LAYOUT slot with all the necessary parameters.
            SfxRequest aRequest (mrBase.GetViewFrame(), SID_ASSIGN_LAYOUT);
            aRequest.AppendItem(SfxUInt32Item (ID_VAL_WHATPAGE, (rpPage->GetPageNum()-1)/2));
            aRequest.AppendItem(SfxUInt32Item (ID_VAL_WHATLAYOUT, aLayout));
            pMainViewShell->ExecuteSlot (aRequest, false);
        }
    }
    while(false);
}

SfxRequest LayoutMenu::CreateRequest (
    sal_uInt16 nSlotId,
    AutoLayout aLayout)
{
    SfxRequest aRequest (mrBase.GetViewFrame(), nSlotId);

    do
    {
        SdrLayerAdmin& rLayerAdmin (mrBase.GetDocument()->GetLayerAdmin());
        SdrLayerID aBackground (rLayerAdmin.GetLayerID(sUNO_LayerName_background));
        SdrLayerID aBackgroundObject (rLayerAdmin.GetLayerID(sUNO_LayerName_background_objects));
        ViewShell* pViewShell = mrBase.GetMainViewShell().get();
        if (pViewShell == nullptr)
            break;
        SdPage* pPage = pViewShell->GetActualPage();
        if (pPage == nullptr)
            break;

        SdrLayerIDSet aVisibleLayers (pPage->TRG_GetMasterPageVisibleLayers());

        aRequest.AppendItem(
            SfxStringItem (ID_VAL_PAGENAME, OUString()));//pPage->GetName()));
        aRequest.AppendItem(SfxUInt32Item (ID_VAL_WHATLAYOUT, aLayout));
        aRequest.AppendItem(
            SfxBoolItem(ID_VAL_ISPAGEBACK, aVisibleLayers.IsSet(aBackground)));
        aRequest.AppendItem(
            SfxBoolItem(
                ID_VAL_ISPAGEOBJ,
                aVisibleLayers.IsSet(aBackgroundObject)));
    }
    while (false);

    return aRequest;
}

void LayoutMenu::Fill()
{
    SvtLanguageOptions aLanguageOptions;
    bool bVertical = aLanguageOptions.IsVerticalTextEnabled();
    SdDrawDocument* pDocument = mrBase.GetDocument();
    bool bRightToLeft = (pDocument!=nullptr
        && pDocument->GetDefaultWritingMode() == WritingMode_RL_TB);

    // Get URL of the view in the center pane.
    OUString sCenterPaneViewName;
    try
    {
        Reference<XControllerManager> xControllerManager (
            Reference<XWeak>(&mrBase.GetDrawController()), UNO_QUERY_THROW);
        Reference<XResourceId> xPaneId (ResourceId::create(
            ::comphelper::getProcessComponentContext(),
            FrameworkHelper::msCenterPaneURL));
        Reference<XView> xView (FrameworkHelper::Instance(mrBase)->GetView(xPaneId));
        if (xView.is())
            sCenterPaneViewName = xView->getResourceId()->getResourceURL();
    }
    catch (RuntimeException&)
    {}

    const snewfoil_value_info* pInfo = nullptr;
    if (sCenterPaneViewName == framework::FrameworkHelper::msNotesViewURL)
    {
        pInfo = notes;
    }
    else if (sCenterPaneViewName == framework::FrameworkHelper::msHandoutViewURL)
    {
        pInfo = handout;
    }
    else if (sCenterPaneViewName == framework::FrameworkHelper::msImpressViewURL
        || sCenterPaneViewName == framework::FrameworkHelper::msSlideSorterURL)
    {
        pInfo = standard;
    }
    else
    {
        pInfo = nullptr;
    }

    Clear();
    for (sal_uInt16 i=1; pInfo!=nullptr && pInfo->mpStrResId != nullptr; i++, pInfo++)
    {
        if ((WritingMode_TB_RL != pInfo->meWritingMode) || bVertical)
        {
            Image aImg("private:graphicrepository/" + OUString::createFromAscii(pInfo->msBmpResId));

            if (bRightToLeft && (WritingMode_TB_RL != pInfo->meWritingMode))
            { // FIXME: avoid interpolating RTL layouts.
                BitmapEx aRTL = aImg.GetBitmapEx();
                aRTL.Mirror(BmpMirrorFlags::Horizontal);
                aImg = Image(aRTL);
            }

            mxLayoutValueSet->InsertItem(i, aImg, SdResId(pInfo->mpStrResId));
            mxLayoutValueSet->SetItemData (i, new AutoLayout(pInfo->maAutoLayout));
        }
    }
}

void LayoutMenu::Clear()
{
    for (size_t nId=1; nId<=mxLayoutValueSet->GetItemCount(); nId++)
        delete static_cast<AutoLayout*>(mxLayoutValueSet->GetItemData(nId));
    mxLayoutValueSet->Clear();
}

void LayoutMenu::ShowContextMenu(const Point* pPos)
{
    if (SD_MOD()->GetWaterCan())
        return;

    // Determine the position where to show the menu.
    Point aMenuPosition;
    if (pPos)
    {
        auto nItemId = mxLayoutValueSet->GetItemId(*pPos);
        if (nItemId <= 0)
            return;
        mxLayoutValueSet->SelectItem(nItemId);
        aMenuPosition = *pPos;
    }
    else
    {
        if (mxLayoutValueSet->GetSelectedItemId() == sal_uInt16(-1))
            return;
        ::tools::Rectangle aBBox(mxLayoutValueSet->GetItemRect(mxLayoutValueSet->GetSelectedItemId()));
        aMenuPosition = aBBox.Center();
    }

    // Setup the menu.
    ::tools::Rectangle aRect(aMenuPosition, Size(1, 1));
    weld::Widget* pPopupParent = mxLayoutValueSet->GetDrawingArea();
    std::unique_ptr<weld::Builder> xBuilder(Application::CreateBuilder(pPopupParent, "modules/simpress/ui/layoutmenu.ui"));
    std::unique_ptr<weld::Menu> xMenu(xBuilder->weld_menu("menu"));

    // Disable the SID_INSERTPAGE_LAYOUT_MENU item when
    // the document is read-only.
    const SfxPoolItem* pItem = nullptr;
    const SfxItemState aState (
        mrBase.GetViewFrame()->GetDispatcher()->QueryState(SID_INSERTPAGE, pItem));
    if (aState == SfxItemState::DISABLED)
        xMenu->set_sensitive("insert", false);

    // Show the menu.
    OnMenuItemSelected(xMenu->popup_at_rect(pPopupParent, aRect));
}

IMPL_LINK_NOARG(LayoutMenu, StateChangeHandler, const OUString&, void)
{
    InvalidateContent();
}

void LayoutMenu::OnMenuItemSelected(std::string_view ident)
{
    if (ident.empty())
        return;

    if (ident == "apply")
    {
        AssignLayoutToSelectedSlides(GetSelectedAutoLayout());
    }
    else if (ident == "insert")
    {
        // Add arguments to this slot and forward it to the main view
        // shell.
        InsertPageWithLayout(GetSelectedAutoLayout());
    }
}

// Selects an appropriate layout of the slide inside control.
//
// Method may be called several times with the same item-id to be selected -
// only once the actually state of the control will be changed.
//
void LayoutMenu::UpdateSelection()
{
    bool bItemSelected = false;

    do
    {
        // Get current page of main view.
        ViewShell* pViewShell = mrBase.GetMainViewShell().get();
        if (pViewShell == nullptr)
            break;

        SdPage* pCurrentPage = pViewShell->getCurrentPage();
        if (pCurrentPage == nullptr)
            break;

        // Get layout of current page.
        AutoLayout aLayout (pCurrentPage->GetAutoLayout());
        if (aLayout<AUTOLAYOUT_START || aLayout>AUTOLAYOUT_END)
            break;

        // Find the entry of the menu for to the layout.
        const sal_uInt16 nItemCount = mxLayoutValueSet->GetItemCount();
        for (sal_uInt16 nId=1; nId<=nItemCount; nId++)
        {
            if (*static_cast<AutoLayout*>(mxLayoutValueSet->GetItemData(nId)) == aLayout)
            {
                // do not set selection twice to the same item
                if (mxLayoutValueSet->GetSelectedItemId() != nId)
                {
                    mxLayoutValueSet->SetNoSelection();
                    mxLayoutValueSet->SelectItem(nId);
                }

                bItemSelected = true; // no need to call SetNoSelection()
                break;
            }
        }
    }
    while (false);

    if (!bItemSelected)
        mxLayoutValueSet->SetNoSelection();
}

IMPL_LINK(LayoutMenu, EventMultiplexerListener, ::sd::tools::EventMultiplexerEvent&, rEvent, void)
{
    switch (rEvent.meEventId)
    {
        // tdf#89890 During changes of the Layout of the slide when focus is not set inside main area
        // we do not receive notification EventMultiplexerEventId::CurrentPageChanged, but we receive the following 3 notification types.
        // => let's make UpdateSelection() also when some shape is changed (during Layout changes)
        case EventMultiplexerEventId::ShapeChanged:
        case EventMultiplexerEventId::ShapeInserted:
        case EventMultiplexerEventId::ShapeRemoved:
            UpdateSelection();
            break;

        case EventMultiplexerEventId::CurrentPageChanged:
        case EventMultiplexerEventId::SlideSortedSelection:
            UpdateSelection();
            break;

        case EventMultiplexerEventId::MainViewAdded:
            mbIsMainViewChangePending = true;
            break;

        case EventMultiplexerEventId::MainViewRemoved:
            HideFocus();
            break;

        case EventMultiplexerEventId::ConfigurationUpdated:
            if (mbIsMainViewChangePending)
            {
                mbIsMainViewChangePending = false;
                InvalidateContent();
            }
            break;

        default:
            break;
    }
}

IMPL_LINK(LayoutMenu, WindowEventHandler, VclWindowEvent&, rEvent, void)
{
    switch (rEvent.GetId())
    {
        case VclEventId::WindowShow:
        case VclEventId::WindowResize:
            SetSizePixel(GetParent()->GetSizePixel());
            break;

        default: break;
    }
}

void LayoutMenu::DataChanged (const DataChangedEvent& /*rEvent*/)
{
    Fill();
    mxLayoutValueSet->StyleUpdated();
    mxLayoutValueSet->SetColor(sfx2::sidebar::Theme::GetColor(sfx2::sidebar::Theme::Color_PanelBackground));
}

} // end of namespace ::sd::sidebar

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