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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/.
*
* 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 .
*/
#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;
}
/** the UNO3_GETIMPLEMENTATION_* macros implement a static helper function
that gives access to your implementation for a given interface reference,
if possible.
Example:
MyClass* pClass = comphelper::getUnoTunnelImplementation<MyClass>( xRef );
Usage:
Put a UNO3_GETIMPLEMENTATION_DECL( classname ) inside your class
definition and UNO3_GETIMPLEMENTATION_IMPL( classname ) inside
your cxx file. Your class must inherit css::lang::XUnoTunnel
and export it with queryInterface. Implementation of XUnoTunnel is
done by this macro.
*/
#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
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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