/* -*- 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 <sdpage.hxx>
#include <View.hxx>
#include <pres.hxx>

#include <svx/svdpagv.hxx>

namespace sd {

static bool implIsMultiPresObj( PresObjKind eKind )
{
    switch( eKind )
    {
    case PresObjKind::Outline:
    case PresObjKind::Graphic:
    case PresObjKind::Object:
    case PresObjKind::Chart:
    case PresObjKind::OrgChart:
    case PresObjKind::Table:
    case PresObjKind::Media:
        return true;
    default:
        return false;
    }
}

SdPage* View::GetPage()
{
    SdPage* pPage = nullptr;
    SdrPageView*    pPV = GetSdrPageView();
    if( pPV )
    {
        pPage = static_cast< SdPage* >( pPV->GetPage() );
    }

    return pPage;
}

// returns selected object in case there's just one object in the selection
SdrObject* View::GetSelectedSingleObject(SdPage const * pPage)
{
    SdrObject* pRet = nullptr;
    if( pPage )
    {
        const SdrMarkList& rMarkList = GetMarkedObjectList();

        // first try selected shape
        if ( rMarkList.GetMarkCount() != 0 )
        {
            if (rMarkList.GetMarkCount() == 1)
            {
                SdrMark* pMark = rMarkList.GetMark(0);
                pRet = pMark->GetMarkedSdrObj();
            }
        }
    }

    return pRet;
}

SdrObject* View::GetEmptyPresentationObject( PresObjKind eKind )
{
    SdPage* pPage = GetPage();
    SdrObject* pEmptyObj = nullptr;

    if ( pPage && !pPage->IsMasterPage() ) {
        SdrObject* pObj = GetSelectedSingleObject( pPage );

        if( pObj && pObj->IsEmptyPresObj() && implIsMultiPresObj( pPage->GetPresObjKind(pObj) ) )
            pEmptyObj = pObj;

        // try to find empty pres obj of same type
        if( !pEmptyObj )
        {
            int nIndex = 1;
            do
            {
                pEmptyObj = pPage->GetPresObj(eKind, nIndex++ );
            }
            while( (pEmptyObj != nullptr) && (!pEmptyObj->IsEmptyPresObj()) );
        }

        // last try to find empty pres obj of multiple type
        if( !pEmptyObj )
        {
            const std::list< SdrObject* >& rShapes = pPage->GetPresentationShapeList().getList();

            auto iter = std::find_if(rShapes.begin(), rShapes.end(),
                [&pPage](SdrObject* pShape) { return pShape->IsEmptyPresObj() && implIsMultiPresObj(pPage->GetPresObjKind(pShape)); });
            if (iter != rShapes.end())
                pEmptyObj = (*iter);
        }
    }

    return pEmptyObj;
}

}

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