/* -*- 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 "sddetect.hxx"

#include <com/sun/star/beans/PropertyValue.hpp>

#include <cppuhelper/supportsservice.hxx>

#include <com/sun/star/io/XInputStream.hpp>

#include <com/sun/star/ucb/ContentCreationException.hpp>

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

#include <rtl/ref.hxx>

#include <vcl/graphicfilter.hxx>

#include <sfx2/docfile.hxx>

#include <sfx2/docfilt.hxx>

#include <sfx2/fcontnr.hxx>

#include <vcl/FilterConfigItem.hxx>

#include <sot/storage.hxx>

#include <comphelper/sequenceashashmap.hxx>

#include <unotools/mediadescriptor.hxx>

#include <tools/urlobj.hxx>

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

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

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

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

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

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

SdFilterDetect::SdFilterDetect()

{

}

SdFilterDetect::~SdFilterDetect()

{

}

OUString SAL_CALL SdFilterDetect::detect( Sequence< beans::PropertyValue >& lDescriptor )

{

    comphelper::SequenceAsHashMap aMediaDesc(lDescriptor);

    OUString aTypeName = aMediaDesc.getUnpackedValueOrDefault( utl::MediaDescriptor::PROP_TYPENAME, OUString() );

    uno::Reference< io::XInputStream > xInStream ( aMediaDesc[utl::MediaDescriptor::PROP_INPUTSTREAM], uno::UNO_QUERY );

    if ( !xInStream.is() )

        return OUString();

    SfxMedium aMedium;

    aMedium.UseInteractionHandler( false );

    aMedium.setStreamToLoadFrom( xInStream, true );

    SvStream *pInStrm = aMedium.GetInStream();

    if ( !pInStrm || pInStrm->GetError() )

        return OUString();

    if ( aTypeName.startsWith( "impress_MS_PowerPoint_97" ) )

    {

        // Do not attempt to create an SotStorage on a

        // 0-length stream as that would create the compound

        // document header on the stream and effectively write to

        // disk!

        pInStrm->Seek( STREAM_SEEK_TO_BEGIN );

        if ( pInStrm->remainingSize() == 0 )

            return OUString();

        try

        {

            rtl::Reference<SotStorage> aStorage = new SotStorage(pInStrm, false);

            if ( !aStorage->GetError() && aStorage->IsStream( u"PowerPoint Document"_ustr ) )

                return aTypeName;

        }

        catch (const css::ucb::ContentCreationException&)

        {

        }

    }

    else

    {

        pInStrm->Seek( STREAM_SEEK_TO_BEGIN );

        const OUString aFileName( aMediaDesc.getUnpackedValueOrDefault( utl::MediaDescriptor::PROP_URL, OUString() ) );

        GraphicDescriptor aDesc( *pInStrm, &aFileName );

        if( !aDesc.Detect() )

        {

            INetURLObject aCheckURL( aFileName );

            if( aCheckURL.getExtension().equalsIgnoreAsciiCase("cgm") )

            {

                sal_uInt8 n8;

                pInStrm->Seek( STREAM_SEEK_TO_BEGIN );

                pInStrm->ReadUChar( n8 );

                if ( ( n8 & 0xf0 ) == 0 )

                    // we are supporting binary cgm format only, so

                    // this is a small test to exclude cgm text

                    return u"impress_CGM_Computer_Graphics_Metafile"_ustr;

            }

        }

        else

        {

            OUString aShortName( GraphicDescriptor::GetImportFormatShortName( aDesc.GetFileFormat() ) );

            GraphicFilter &rGrfFilter = GraphicFilter::GetGraphicFilter();

            const OUString aName( rGrfFilter.GetImportFormatTypeName( rGrfFilter.GetImportFormatNumberForShortName( aShortName ) ) );

            if ( aShortName.equalsIgnoreAsciiCase( "PCD" ) )    // there is a multiple pcd selection possible

            {

                sal_Int32 nBase = 2;    // default Base0

                if ( aTypeName == "pcd_Photo_CD_Base4" )

                    nBase = 1;

                else if ( aTypeName == "pcd_Photo_CD_Base16" )

                    nBase = 0;

                FilterConfigItem aFilterConfigItem( u"Office.Common/Filter/Graphic/Import/PCD" );

                aFilterConfigItem.WriteInt32( u"Resolution"_ustr , nBase );

            }

            SfxFilterMatcher aMatch(u"sdraw"_ustr);

            std::shared_ptr<const SfxFilter> pFilter = aMatch.GetFilter4FilterName( aName );

            if ( pFilter )

                return pFilter->GetRealTypeName();

        }

    }

    return OUString();

}

// XServiceInfo

OUString SAL_CALL SdFilterDetect::getImplementationName()

{

    return u"com.sun.star.comp.draw.FormatDetector"_ustr;

}

// XServiceInfo

sal_Bool SAL_CALL SdFilterDetect::supportsService( const OUString& sServiceName )

{

    return cppu::supportsService(this, sServiceName);

}

// XServiceInfo

Sequence< OUString > SAL_CALL SdFilterDetect::getSupportedServiceNames()

{

    return { u"com.sun.star.frame.ExtendedTypeDetection"_ustr };

}

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

com_sun_star_comp_draw_FormatDetector_get_implementation(css::uno::XComponentContext*,

                                                         css::uno::Sequence<css::uno::Any> const &)

{

    return cppu::acquire(new SdFilterDetect());

}

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