/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <scitems.hxx>

#include <editeng/eeitem.hxx>

#include <xmloff/XMLFontAutoStylePool.hxx>
#include <editeng/fontitem.hxx>
#include <editeng/editeng.hxx>
#include <document.hxx>
#include <docpool.hxx>
#include "xmlexprt.hxx"
#include <stlpool.hxx>
#include <attrib.hxx>

class ScXMLFontAutoStylePool_Impl: public XMLFontAutoStylePool
{
private:
    // #i120077# remember owned pool
    SfxItemPool*    mpEditEnginePool;

    void AddFontItems(const sal_uInt16* pWhichIds, sal_uInt8 nIdCount, const SfxItemPool* pItemPool, const bool bExportDefaults);

public:
    ScXMLFontAutoStylePool_Impl( ScXMLExport& rExport, bool bEmbedFonts);
    virtual ~ScXMLFontAutoStylePool_Impl() override;
};

void ScXMLFontAutoStylePool_Impl::AddFontItems(const sal_uInt16* pWhichIds, sal_uInt8 nIdCount, const SfxItemPool* pItemPool, const bool bExportDefaults)
{
    for( sal_uInt16 i=0; i < nIdCount; ++i )
    {
        const SfxPoolItem* pItem;
        sal_uInt16 nWhichId(pWhichIds[i]);
        if (bExportDefaults)
        {
            pItem = &pItemPool->GetDefaultItem(nWhichId);
            const SvxFontItem *pFont(static_cast<const SvxFontItem *>(pItem));
            Add( pFont->GetFamilyName(), pFont->GetStyleName(),
                    pFont->GetFamily(), pFont->GetPitch(),
                    pFont->GetCharSet() );
        }
        sal_uInt32 nItems(pItemPool->GetItemCount2( nWhichId ));
        for( sal_uInt32 j = 0; j < nItems; ++j )
        {
            if( nullptr != (pItem = pItemPool->GetItem2( nWhichId, j ) ) )
            {
                const SvxFontItem *pFont(static_cast<const SvxFontItem *>(pItem));
                Add( pFont->GetFamilyName(), pFont->GetStyleName(),
                     pFont->GetFamily(), pFont->GetPitch(),
                     pFont->GetCharSet() );
            }
        }
    }
}

ScXMLFontAutoStylePool_Impl::ScXMLFontAutoStylePool_Impl(ScXMLExport& rExportP, bool bEmbedFonts)
    : XMLFontAutoStylePool(rExportP, bEmbedFonts)
    , mpEditEnginePool(nullptr)
{
    sal_uInt16 const aWhichIds[]     { ATTR_FONT, ATTR_CJK_FONT,
                                       ATTR_CTL_FONT };
    sal_uInt16 const aEditWhichIds[] { EE_CHAR_FONTINFO, EE_CHAR_FONTINFO_CJK,
                                       EE_CHAR_FONTINFO_CTL };
    sal_uInt16 const aPageWhichIds[] { ATTR_PAGE_HEADERLEFT, ATTR_PAGE_FOOTERLEFT,
                                       ATTR_PAGE_HEADERRIGHT, ATTR_PAGE_FOOTERRIGHT };

    const SfxItemPool* pItemPool(rExportP.GetDocument()->GetPool());
    AddFontItems(aWhichIds, 3, pItemPool, true);
    const SfxItemPool* pEditPool(rExportP.GetDocument()->GetEditPool());
    AddFontItems(aEditWhichIds, 3, pEditPool, false);

    std::unique_ptr<SfxStyleSheetIterator> pItr = rExportP.GetDocument()->GetStyleSheetPool()->CreateIterator(SfxStyleFamily::Page, SfxStyleSearchBits::All);

    m_bEmbedUsedOnly = rExportP.GetDocument()->IsEmbedUsedFontsOnly();
    m_bEmbedLatinScript = rExportP.GetDocument()->IsEmbedFontScriptLatin();
    m_bEmbedAsianScript = rExportP.GetDocument()->IsEmbedFontScriptAsian();
    m_bEmbedComplexScript = rExportP.GetDocument()->IsEmbedFontScriptComplex();

    if(pItr)
    {
        SfxStyleSheetBase* pStyle(pItr->First());

        if(pStyle)
        {
            // #i120077# remember the SfxItemPool in member variable before usage. The
            // local EditEngine will not take over ownership of the pool.
            mpEditEnginePool = EditEngine::CreatePool();
            EditEngine aEditEngine(mpEditEnginePool);

            while (pStyle)
            {
                const SfxItemPool& rPagePool(pStyle->GetPool()->GetPool());

                for (sal_uInt16 nPageWhichId : aPageWhichIds)
                {
                    sal_uInt32 nPageHFItems(rPagePool.GetItemCount2(nPageWhichId));
                    for (sal_uInt32 k = 0; k < nPageHFItems; ++k)
                    {
                        const ScPageHFItem* pPageItem;
                        if (nullptr != (pPageItem = static_cast<const ScPageHFItem*>(rPagePool.GetItem2(nPageWhichId, k))))
                        {
                            const EditTextObject* pLeftArea(pPageItem->GetLeftArea());
                            if (pLeftArea)
                            {
                                aEditEngine.SetText(*pLeftArea);
                                AddFontItems(aEditWhichIds, 3, mpEditEnginePool, false);
                            }
                            const EditTextObject* pCenterArea(pPageItem->GetCenterArea());
                            if (pCenterArea)
                            {
                                aEditEngine.SetText(*pCenterArea);
                                AddFontItems(aEditWhichIds, 3, mpEditEnginePool, false);
                            }
                            const EditTextObject* pRightArea(pPageItem->GetRightArea());
                            if (pRightArea)
                            {
                                aEditEngine.SetText(*pRightArea);
                                AddFontItems(aEditWhichIds, 3, mpEditEnginePool, false);
                            }
                        }
                    }
                }

                pStyle = pItr->Next();
            }
        }
    }
}

ScXMLFontAutoStylePool_Impl::~ScXMLFontAutoStylePool_Impl()
{
    if(mpEditEnginePool)
    {
        // memory leak #i120077#
        SfxItemPool::Free(mpEditEnginePool);
    }
}

XMLFontAutoStylePool* ScXMLExport::CreateFontAutoStylePool()
{
    bool blockFontEmbedding = false;
    // We write font info to both content.xml and styles.xml, but they are both
    // written by different ScXMLExport instance, and would therefore write each
    // font file twice without complicated checking for duplicates, so handle
    // the embedding only in one of them.
    if(!( getExportFlags() & SvXMLExportFlags::CONTENT ))
        blockFontEmbedding = true;
    if (!GetDocument()->IsEmbedFonts())
        blockFontEmbedding = true;
    return new ScXMLFontAutoStylePool_Impl( *this, !blockFontEmbedding );
}

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