/* -*- 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 .

 */

#ifdef _WIN32

#include <prewin.h>

#include <postwin.h>

#endif

#include <com/sun/star/uno/Exception.hpp>

#include <com/sun/star/graphic/GraphicProvider.hpp>

#include <com/sun/star/graphic/XGraphicProvider.hpp>

#include <com/sun/star/graphic/XGraphic.hpp>

#include <vcl/gdimtf.hxx>

#include <vcl/graph.hxx>

#include <vcl/cvtgrf.hxx>

#include <vcl/bitmap.hxx>

#include <vcl/graphicfilter.hxx>

#include <tools/stream.hxx>

#include <unotools/ucbstreamhelper.hxx>

#include <comphelper/processfactory.hxx>

#include <comphelper/propertyvalue.hxx>

#include <o3tl/char16_t2wchar_t.hxx>

#include <o3tl/string_view.hxx>

#include "graphhelp.hxx"

#include <bitmaps.hlst>

#include <memory>

#if defined _WIN32

#include <tools/mapunit.hxx>

#include <unotools/tempfile.hxx>

#include <vcl/outdev.hxx>

#endif

using namespace css;

std::unique_ptr<SvMemoryStream> GraphicHelper::getFormatStrFromGDI_Impl( const GDIMetaFile* pGDIMeta, ConvertDataFormat nFormat )

{

    std::unique_ptr<SvMemoryStream> pResult;

    if ( pGDIMeta )

    {

        std::unique_ptr<SvMemoryStream> pStream(new SvMemoryStream( 65535, 65535 ));

        Graphic aGraph( *pGDIMeta );

        if ( GraphicConverter::Export( *pStream, aGraph, nFormat ) == ERRCODE_NONE )

            pResult = std::move(pStream);

    }

    return pResult;

}

// static

void* GraphicHelper::getEnhMetaFileFromGDI_Impl( const GDIMetaFile* pGDIMeta )

{

    void* pResult = nullptr;

#ifdef _WIN32

    if ( pGDIMeta )

    {

        ::utl::TempFileNamed aTempFile( u"", true, u".emf" );

        OUString aMetaFile = aTempFile.GetFileName();

        OUString aMetaURL = aTempFile.GetURL();

        std::unique_ptr<SvStream> pStream = ::utl::UcbStreamHelper::CreateStream( aMetaURL, StreamMode::STD_READWRITE );

        if ( pStream )

        {

            Graphic aGraph( *pGDIMeta );

            ErrCode nFailed = GraphicConverter::Export( *pStream, aGraph, ConvertDataFormat::EMF );

            pStream->Flush();

            pStream.reset();

            if ( !nFailed )

                pResult = GetEnhMetaFileW( o3tl::toW(aMetaFile.getStr()) );

        }

    }

#else

    (void)pGDIMeta;  // unused

#endif

    return pResult;

}

// static

void* GraphicHelper::getWinMetaFileFromGDI_Impl( const GDIMetaFile* pGDIMeta, const Size& aMetaSize )

{

    void* pResult = nullptr;

#ifdef _WIN32

    if ( pGDIMeta )

    {

        SvMemoryStream pStream( 65535, 65535 );

        Graphic aGraph( *pGDIMeta );

        ErrCode nFailed = GraphicConverter::Export( pStream, aGraph, ConvertDataFormat::WMF );

        pStream.Flush();

        if ( !nFailed )

        {

            sal_uInt64 nLength = pStream.TellEnd();

            if ( nLength > 22 )

            {

                HMETAFILE hMeta = SetMetaFileBitsEx( nLength - 22,

                                static_cast< const unsigned char*>( pStream.GetData() ) + 22 );

                if ( hMeta )

                {

                    HGLOBAL hMemory = GlobalAlloc( GMEM_DDESHARE | GMEM_MOVEABLE, sizeof( METAFILEPICT ) );

                    if ( hMemory )

                    {

                        if (METAFILEPICT* pMF = static_cast<METAFILEPICT*>(GlobalLock(hMemory)))

                        {

                            pMF->hMF = hMeta;

                            pMF->mm = MM_ANISOTROPIC;

                            MapMode aWinMode( MapUnit::Map100thMM );

                            if ( aWinMode == pGDIMeta->GetPrefMapMode() )

                            {

                                pMF->xExt = aMetaSize.Width();

                                pMF->yExt = aMetaSize.Height();

                            }

                            else

                            {

                                Size aWinSize = OutputDevice::LogicToLogic( Size( aMetaSize.Width(), aMetaSize.Height() ),

                                                                            pGDIMeta->GetPrefMapMode(),

                                                                            aWinMode );

                                pMF->xExt = aWinSize.Width();

                                pMF->yExt = aWinSize.Height();

                            }

                            GlobalUnlock(hMemory);

                        }

                        pResult = static_cast<void*>(hMemory);

                    }

                    else

                           DeleteMetaFile( hMeta );

                }

            }

        }

    }

#else

    (void)pGDIMeta;  // unused

    (void)aMetaSize; // unused

#endif

    return pResult;

}

// static

bool GraphicHelper::getThumbnailFormatFromBitmap_Impl(const Bitmap& rBitmap, const uno::Reference<io::XStream>& xStream)

{

    if (rBitmap.IsEmpty() || !xStream.is())

        return false;

    std::unique_ptr<SvStream> pStream(utl::UcbStreamHelper::CreateStream(xStream));

    if (pStream->GetError())

        return false;

    Bitmap bitmap(rBitmap);

    bitmap.Convert(BmpConversion::N8BitColors);

    GraphicFilter& rFilter = GraphicFilter::GetGraphicFilter();

    if (rFilter.compressAsPNG(bitmap, *pStream) != ERRCODE_NONE)

        return false;

    pStream->FlushBuffer();

    return !pStream->GetError();

}

// static

bool GraphicHelper::getThumbnailReplacement_Impl(std::u16string_view rResID, const uno::Reference< io::XStream >& xStream )

{

    bool bResult = false;

    if (!rResID.empty() && xStream.is())

    {

        const uno::Reference< uno::XComponentContext >& xContext = ::comphelper::getProcessComponentContext();

        try

        {

            uno::Reference< graphic::XGraphicProvider > xGraphProvider(graphic::GraphicProvider::create(xContext));

            const OUString aURL{OUString::Concat("private:graphicrepository/") + rResID};

            uno::Sequence< beans::PropertyValue > aMediaProps{ comphelper::makePropertyValue(u"URL"_ustr,

                                                                                             aURL) };

            uno::Reference< graphic::XGraphic > xGraphic = xGraphProvider->queryGraphic( aMediaProps );

            if ( xGraphic.is() )

            {

                uno::Sequence< beans::PropertyValue > aStoreProps{

                    comphelper::makePropertyValue(u"OutputStream"_ustr, xStream),

                    comphelper::makePropertyValue(u"MimeType"_ustr, u"image/png"_ustr)

                };

                xGraphProvider->storeGraphic( xGraphic, aStoreProps );

                bResult = true;

            }

        }

        catch(const uno::Exception&)

        {

        }

    }

    return bResult;

}

// static

OUString GraphicHelper::getThumbnailReplacementIDByFactoryName_Impl( std::u16string_view aFactoryShortName )

{

    OUString sResult;

    if ( aFactoryShortName == u"scalc" )

    {

        sResult = BMP_128X128_CALC_DOC;

    }

    else if ( aFactoryShortName == u"sdraw" )

    {

        sResult = BMP_128X128_DRAW_DOC;

    }

    else if ( aFactoryShortName == u"simpress" )

    {

        sResult = BMP_128X128_IMPRESS_DOC;

    }

    else if ( aFactoryShortName == u"smath" )

    {

        sResult = BMP_128X128_MATH_DOC;

    }

    else if ( aFactoryShortName == u"swriter" || o3tl::starts_with(aFactoryShortName, u"swriter/") )

    {

        sResult = BMP_128X128_WRITER_DOC;

    }

    return sResult;

}

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