e2c7a6bd57
Change-Id: I6a07860edb13588b83345babeb53675aedc43f7a Reviewed-on: https://gerrit.libreoffice.org/c/core/+/150607 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
142 lines
4.9 KiB
C++
142 lines
4.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_COMPHELPER_SERVICEHELPER_HXX
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#define INCLUDED_COMPHELPER_SERVICEHELPER_HXX
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#include <rtl/uuid.h>
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#include <com/sun/star/lang/XUnoTunnel.hpp>
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#include <com/sun/star/uno/Sequence.hxx>
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namespace comphelper {
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// Class incapsulating UIDs used as e.g. tunnel IDs for css::lang::XUnoTunnel,
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// or implementation IDs for css::lang::XTypeProvider
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class UnoIdInit
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{
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private:
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css::uno::Sequence< sal_Int8 > m_aSeq;
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public:
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UnoIdInit() : m_aSeq(16)
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{
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rtl_createUuid(reinterpret_cast<sal_uInt8*>(m_aSeq.getArray()), nullptr, true);
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}
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const css::uno::Sequence< sal_Int8 >& getSeq() const { return m_aSeq; }
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};
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inline sal_Int64 getSomething_cast(void* p)
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{
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return sal::static_int_cast<sal_Int64>(reinterpret_cast<sal_IntPtr>(p));
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}
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template<class T> inline T* getSomething_cast(sal_Int64 n)
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{
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return reinterpret_cast<T*>(sal::static_int_cast<sal_IntPtr>(n));
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}
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template <class T> T* getFromUnoTunnel(const css::uno::Reference<css::lang::XUnoTunnel>& xUT)
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{
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if (!xUT.is())
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return nullptr;
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return getSomething_cast<T>(xUT->getSomething(T::getUnoTunnelId()));
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}
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// Takes an interface
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template <class T> T* getFromUnoTunnel(const css::uno::Reference<css::uno::XInterface>& xIface)
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{
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return getFromUnoTunnel<T>(
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css::uno::Reference<css::lang::XUnoTunnel>{ xIface, css::uno::UNO_QUERY });
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}
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template <typename T>
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inline bool isUnoTunnelId(const css::uno::Sequence< sal_Int8 >& rId)
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{
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return rId.getLength() == 16
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&& memcmp(T::getUnoTunnelId().getConstArray(), rId.getConstArray(), 16) == 0;
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}
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template <class Base> struct FallbackToGetSomethingOf
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{
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static sal_Int64 get(const css::uno::Sequence<sal_Int8>& rId, Base* p)
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{
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return p->Base::getSomething(rId);
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}
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};
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template <> struct FallbackToGetSomethingOf<void>
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{
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static sal_Int64 get(const css::uno::Sequence<sal_Int8>&, void*) { return 0; }
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};
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template <class T, class Base = void>
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sal_Int64 getSomethingImpl(const css::uno::Sequence<sal_Int8>& rId, T* pThis,
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FallbackToGetSomethingOf<Base> = {})
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{
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if (isUnoTunnelId<T>(rId))
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return getSomething_cast(pThis);
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return FallbackToGetSomethingOf<Base>::get(rId, pThis);
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}
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}
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/** the UNO3_GETIMPLEMENTATION_* macros implement a static helper function
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that gives access to your implementation for a given interface reference,
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if possible.
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Example:
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MyClass* pClass = comphelper::getFromUnoTunnel<MyClass>( xRef );
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Usage:
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Put a UNO3_GETIMPLEMENTATION_DECL( classname ) inside your class
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definition and UNO3_GETIMPLEMENTATION_IMPL( classname ) inside
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your cxx file. Your class must inherit css::lang::XUnoTunnel
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and export it with queryInterface. Implementation of XUnoTunnel is
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done by this macro.
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*/
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#define UNO3_GETIMPLEMENTATION_DECL( classname ) \
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static const css::uno::Sequence< sal_Int8 > & getUnoTunnelId() noexcept; \
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virtual sal_Int64 SAL_CALL getSomething( const css::uno::Sequence< sal_Int8 >& aIdentifier ) override;
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#define UNO3_GETIMPLEMENTATION_BASE_IMPL( classname ) \
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const css::uno::Sequence< sal_Int8 > & classname::getUnoTunnelId() noexcept \
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{ \
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static const comphelper::UnoIdInit aId; \
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return aId.getSeq(); \
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}
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#define UNO3_GETIMPLEMENTATION_IMPL( classname )\
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UNO3_GETIMPLEMENTATION_BASE_IMPL(classname)\
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sal_Int64 SAL_CALL classname::getSomething( const css::uno::Sequence< sal_Int8 >& rId ) \
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{ \
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return comphelper::getSomethingImpl(rId, this); \
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}
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#define UNO3_GETIMPLEMENTATION2_IMPL( classname, baseclass )\
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UNO3_GETIMPLEMENTATION_BASE_IMPL(classname)\
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sal_Int64 SAL_CALL classname::getSomething( const css::uno::Sequence< sal_Int8 >& rId ) \
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{ \
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return comphelper::getSomethingImpl(rId, this, comphelper::FallbackToGetSomethingOf<baseclass>{}); \
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}
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#endif // INCLUDED_COMPHELPER_SERVICEHELPER_HXX
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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