/* -*- 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 <sal/config.h>

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

#include <com/sun/star/lang/XServiceInfo.hpp>

#include <cppuhelper/implbase.hxx>

#include <cppuhelper/supportsservice.hxx>

#include <utility>

#include <tools/mapunit.hxx>

#include <vcl/outdev.hxx>

#include <vcl/svapp.hxx>

#include <vcl/wmfexternal.hxx>

#include <basegfx/matrix/b2dhommatrixtools.hxx>

#include <unotools/ucbstreamhelper.hxx>

#include <drawinglayer/primitive2d/metafileprimitive2d.hxx>

#include <sal/log.hxx>

#include <comphelper/sequenceashashmap.hxx>

#include <wmfreader.hxx>

#include <emfreader.hxx>

using namespace ::com::sun::star;

namespace emfio::emfreader

{

        namespace {

        class XEmfParser : public ::cppu::WeakImplHelper< graphic::XEmfParser, lang::XServiceInfo >

        {

        private:

            uno::Reference< uno::XComponentContext > context_;

            basegfx::B2DTuple maSizeHint;

        public:

            explicit XEmfParser(

                uno::Reference< uno::XComponentContext > context);

            XEmfParser(const XEmfParser&) = delete;

            XEmfParser& operator=(const XEmfParser&) = delete;

            // XEmfParser

            virtual uno::Sequence< uno::Reference< ::graphic::XPrimitive2D > > SAL_CALL getDecomposition(

                const uno::Reference< ::io::XInputStream >& xEmfStream,

                const OUString& aAbsolutePath,

                const uno::Sequence< ::beans::PropertyValue >& rProperties) override;

            void SAL_CALL setSizeHint(const geometry::RealPoint2D& rSize) override;

            // XServiceInfo

            virtual OUString SAL_CALL getImplementationName() override;

            virtual sal_Bool SAL_CALL supportsService(const OUString&) override;

            virtual uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;

        };

        }

        XEmfParser::XEmfParser(

            uno::Reference< uno::XComponentContext > context):

            context_(std::move(context))

        {

        }

        uno::Sequence< uno::Reference< ::graphic::XPrimitive2D > > XEmfParser::getDecomposition(

            const uno::Reference< ::io::XInputStream >& xEmfStream,

            const OUString& /*aAbsolutePath*/,

            const uno::Sequence< ::beans::PropertyValue >& rProperties)

        {

            drawinglayer::primitive2d::Primitive2DContainer aRetval;

            if (xEmfStream.is())

            {

                WmfExternal aExternalHeader;

                const bool bExternalHeaderUsed(aExternalHeader.setSequence(rProperties));

                bool bEnableEMFPlus = true;

                comphelper::SequenceAsHashMap aMap(rProperties);

                auto it = aMap.find(u"EMFPlusEnable"_ustr);

                if (it != aMap.end())

                {

                    bool bValue;

                    if (it->second >>= bValue)

                    {

                        bEnableEMFPlus = bValue;

                    }

                }

                // rough check - import and conv to primitive

                GDIMetaFile aMtf;

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

                sal_uInt64 nOrgPos = pStream->Tell();

                SvStreamEndian nOrigNumberFormat = pStream->GetEndian();

                pStream->SetEndian(SvStreamEndian::LITTLE);

                sal_uInt32 nMetaType(0);

                if (checkSeek(*pStream, 0x28))

                    pStream->ReadUInt32(nMetaType);

                pStream->Seek(nOrgPos);

                bool bReadError(false);

                try

                {

                    if (nMetaType == 0x464d4520)

                    {

                        // read and get possible failure/error, ReadEnhWMF returns success

                        emfio::EmfReader aReader(*pStream, aMtf);

                        aReader.SetSizeHint(maSizeHint);

                        if (!bEnableEMFPlus)

                        {

                            aReader.SetEnableEMFPlus(bEnableEMFPlus);

                        }

                        bReadError = !aReader.ReadEnhWMF();

                    }

                    else

                    {

                        emfio::WmfReader aReader(*pStream, aMtf, bExternalHeaderUsed ? &aExternalHeader : nullptr);

                        if (!bEnableEMFPlus)

                            aReader.SetEnableEMFPlus(bEnableEMFPlus);

                        aReader.ReadWMF();

                        // Need to check for ErrCode at stream to not lose former work.

                        // This may contain important information and will behave the

                        // same as before. When we have an error, do not create content

                        ErrCode aErrCode(pStream->GetError());

                        bReadError = aErrCode.IsError();

                    }

                }

                catch (...)

                {

                    bReadError = true;

                }

                pStream->SetEndian(nOrigNumberFormat);

                if (!bReadError)

                {

                    Size aSize(aMtf.GetPrefSize());

                    if (aMtf.GetPrefMapMode().GetMapUnit() == MapUnit::MapPixel)

                    {

                        aSize = Application::GetDefaultDevice()->PixelToLogic(aSize, MapMode(MapUnit::Map100thMM));

                    }

                    else

                    {

                        aSize = OutputDevice::LogicToLogic(aSize, aMtf.GetPrefMapMode(), MapMode(MapUnit::Map100thMM));

                    }

                    // use size

                    const basegfx::B2DHomMatrix aMetafileTransform(

                        basegfx::utils::createScaleB2DHomMatrix(

                            aSize.Width(),

                            aSize.Height()));

                    // ...and create a single MetafilePrimitive2D containing the Metafile.

                    // CAUTION: Currently, ReadWindowMetafile uses the local VectorGraphicData

                    // and a MetafileAccessor hook at the MetafilePrimitive2D inside of

                    // ImpGraphic::ImplGetGDIMetaFile to get the Metafile. Thus, the first

                    // and only primitive in this case *has to be* a MetafilePrimitive2D.

                    aRetval.push_back(

                        new drawinglayer::primitive2d::MetafilePrimitive2D(

                            aMetafileTransform,

                            aMtf));

                    // // force to use decomposition directly to get rid of the metafile

                    // const css::uno::Sequence< css::beans::PropertyValue > aViewParameters;

                    // drawinglayer::primitive2d::MetafilePrimitive2D aMetafilePrimitive2D(

                    //     aMetafileTransform,

                    //     aMtf);

                    // aRetval.append(aMetafilePrimitive2D.getDecomposition(aViewParameters));

                    // if (aRetval.empty())

                    // {

                    //     // for test, just create some graphic data that will get visualized

                    //     const basegfx::B2DRange aRange(1000, 1000, 5000, 5000);

                    //     const basegfx::BColor aColor(1.0, 0.0, 0.0);

                    //     const basegfx::B2DPolygon aOutline(basegfx::utils::createPolygonFromRect(aRange));

                    //

                    //     aRetval.push_back(new drawinglayer::primitive2d::PolyPolygonColorPrimitive2D(basegfx::B2DPolyPolygon(aOutline), aColor));

                    // }

                }

            }

            else

            {

                SAL_WARN("emfio", "Invalid stream (!)");

            }

            return aRetval.toSequence();

        }

        void XEmfParser::setSizeHint(const geometry::RealPoint2D& rSize)

        {

            maSizeHint.setX(rSize.X);

            maSizeHint.setY(rSize.Y);

        }

        OUString SAL_CALL XEmfParser::getImplementationName()

        {

            return u"emfio::emfreader::XEmfParser"_ustr;

        }

        sal_Bool SAL_CALL XEmfParser::supportsService(const OUString& rServiceName)

        {

            return cppu::supportsService(this, rServiceName);

        }

        uno::Sequence< OUString > SAL_CALL XEmfParser::getSupportedServiceNames()

        {

            return { u"com.sun.star.graphic.EmfTools"_ustr };

        }

} // end of namespace emfio::emfreader

extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*

emfio_emfreader_XEmfParser_get_implementation(

    css::uno::XComponentContext* context, css::uno::Sequence<css::uno::Any> const& )

{

    return cppu::acquire(new emfio::emfreader::XEmfParser(context));

}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */