servicehelper.hxx

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#ifndef INCLUDED_COMPHELPER_SERVICEHELPER_HXX
#define INCLUDED_COMPHELPER_SERVICEHELPER_HXX

#include <rtl/uuid.h>
#include <rtl/instance.hxx>
#include <com/sun/star/lang/XUnoTunnel.hpp>
#include <com/sun/star/uno/Sequence.hxx>

class UnoTunnelIdInit
{
private:
    css::uno::Sequence< sal_Int8 > m_aSeq;
public:
    UnoTunnelIdInit() : m_aSeq(16)
    {
        rtl_createUuid( reinterpret_cast<sal_uInt8*>(m_aSeq.getArray()), nullptr, true );
    }
    const css::uno::Sequence< sal_Int8 >& getSeq() const { return m_aSeq; }
};

namespace comphelper {

    template<class T>
    T* getUnoTunnelImplementation( const css::uno::Reference< css::uno::XInterface >& xIface )
    {
        css::uno::Reference< css::lang::XUnoTunnel > xUT( xIface, css::uno::UNO_QUERY );
        if (!xUT.is())
            return nullptr;

        return reinterpret_cast<T*>(sal::static_int_cast<sal_IntPtr>(xUT->getSomething( T::getUnoTunnelId() )));
    }

}

template <typename T>
inline bool isUnoTunnelId(const css::uno::Sequence< sal_Int8 >& rId)
{
    return rId.getLength() == 16
        && memcmp( T::getUnoTunnelId().getConstArray(), rId.getConstArray(), 16 ) == 0;
}

#define UNO3_GETIMPLEMENTATION_DECL( classname ) \
    static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId() noexcept; \
    virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;

#define UNO3_GETIMPLEMENTATION_BASE_IMPL( classname ) \
const css::uno::Sequence< sal_Int8 > & classname::getUnoTunnelId() noexcept \
{ \
    static const UnoTunnelIdInit aId; \
    return aId.getSeq(); \
}

#define UNO3_GETIMPLEMENTATION_IMPL( classname )\
UNO3_GETIMPLEMENTATION_BASE_IMPL(classname)\
sal_Int64 SAL_CALL classname::getSomething( const css::uno::Sequence< sal_Int8 >& rId ) \
{ \
    if( isUnoTunnelId<classname>(rId) ) \
    { \
        return sal::static_int_cast<sal_Int64>(reinterpret_cast<sal_IntPtr>(this)); \
    } \
    return 0; \
}

#define UNO3_GETIMPLEMENTATION2_IMPL( classname, baseclass )\
UNO3_GETIMPLEMENTATION_BASE_IMPL(classname)\
sal_Int64 SAL_CALL classname::getSomething( const css::uno::Sequence< sal_Int8 >& rId ) \
{ \
    if( isUnoTunnelId<classname>(rId) ) \
    { \
        return sal::static_int_cast<sal_Int64>(reinterpret_cast<sal_IntPtr>(this)); \
    } \
    else \
    { \
        return baseclass::getSomething( rId ); \
    } \
}


#endif // INCLUDED_COMPHELPER_SERVICEHELPER_HXX

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