filterdetect.cxx

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/* -*- 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/.
 */
 
#include <com/sun/star/document/XExtendedFilterDetection.hpp>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <com/sun/star/io/XInputStream.hpp>
#include <cppuhelper/implbase.hxx>
#include <cppuhelper/supportsservice.hxx>
 
#include <unotools/mediadescriptor.hxx>
 
#include <tools/stream.hxx>
 
#include <orcus/format_detection.hpp>
 
namespace com::sun::star::uno { class XComponentContext; }
 
namespace {
 
class OrcusFormatDetect : public ::cppu::WeakImplHelper<
                          css::document::XExtendedFilterDetection,
                          css::lang::XServiceInfo >
{
public:
    explicit            OrcusFormatDetect();
 
    virtual OUString SAL_CALL getImplementationName() override;
 
    virtual sal_Bool SAL_CALL supportsService(const OUString& rServiceName) override;
 
    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
 
    virtual OUString SAL_CALL
                        detect( css::uno::Sequence< css::beans::PropertyValue >& rMediaDescSeq ) override;
 
private:
};
 
OrcusFormatDetect::OrcusFormatDetect()
{
}
 
OUString OrcusFormatDetect::getImplementationName()
{
    return "com.sun.star.comp.sc.OrcusFilterDetect";
}
 
sal_Bool OrcusFormatDetect::supportsService(const OUString& rServiceName)
{
    return cppu::supportsService(this, rServiceName);
}
 
css::uno::Sequence<OUString> OrcusFormatDetect::getSupportedServiceNames()
{
    return {"com.sun.star.frame.ExtendedTypeDetection"};
}
 
OUString OrcusFormatDetect::detect(css::uno::Sequence<css::beans::PropertyValue>& rMediaDescSeq)
{
    utl::MediaDescriptor aMediaDescriptor( rMediaDescSeq );
    bool bAborted = aMediaDescriptor.getUnpackedValueOrDefault(utl::MediaDescriptor::PROP_ABORTED, false);
    if (bAborted)
        return OUString();
 
    css::uno::Reference<css::io::XInputStream> xInputStream(aMediaDescriptor[utl::MediaDescriptor::PROP_INPUTSTREAM], css::uno::UNO_QUERY );
    SvMemoryStream aContent(xInputStream->available());
 
    static const sal_Int32 nBytes = 4096;
    css::uno::Sequence<sal_Int8> aSeq(nBytes);
    bool bEnd = false;
    while(!bEnd)
    {
        sal_Int32 nReadBytes = xInputStream->readBytes(aSeq, nBytes);
        bEnd = (nReadBytes != nBytes);
        aContent.WriteBytes(aSeq.getConstArray(), nReadBytes);
    }
 
    std::string_view aStream(static_cast<const char*>(aContent.GetData()), aContent.GetSize());
    orcus::format_t eFormat = orcus::detect(aStream);
 
    switch (eFormat)
    {
        case orcus::format_t::gnumeric:
            return "Gnumeric XML";
        case orcus::format_t::xls_xml:
            return "calc_MS_Excel_2003_XML";
        default:
            ;
    }
 
    return OUString();
}
 
}
 
extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
com_sun_star_comp_sc_OrcusFormatDetect_get_implementation(css::uno::XComponentContext* ,
                                                           css::uno::Sequence<css::uno::Any> const &)
{
    return cppu::acquire(new OrcusFormatDetect());
}
 
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