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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:06:44 +0000
commited5640d8b587fbcfed7dd7967f3de04b37a76f26 (patch)
tree7a5f7c6c9d02226d7471cb3cc8fbbf631b415303 /include/comphelper/servicehelper.hxx
parentInitial commit. (diff)
downloadlibreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.tar.xz
libreoffice-ed5640d8b587fbcfed7dd7967f3de04b37a76f26.zip
Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/comphelper/servicehelper.hxx')
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diff --git a/include/comphelper/servicehelper.hxx b/include/comphelper/servicehelper.hxx
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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 <com/sun/star/lang/XUnoTunnel.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+
+namespace comphelper {
+
+ // Class incapsulating UIDs used as e.g. tunnel IDs for css::lang::XUnoTunnel,
+ // or implementation IDs for css::lang::XTypeProvider
+ class UnoIdInit
+ {
+ private:
+ css::uno::Sequence< sal_Int8 > m_aSeq;
+ public:
+ UnoIdInit() : 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; }
+ };
+
+ inline sal_Int64 getSomething_cast(void* p)
+ {
+ return sal::static_int_cast<sal_Int64>(reinterpret_cast<sal_IntPtr>(p));
+ }
+
+ template<class T> inline T* getSomething_cast(sal_Int64 n)
+ {
+ return reinterpret_cast<T*>(sal::static_int_cast<sal_IntPtr>(n));
+ }
+
+ template <class T> T* getFromUnoTunnel(const css::uno::Reference<css::lang::XUnoTunnel>& xUT)
+ {
+ if (!xUT.is())
+ return nullptr;
+
+ return getSomething_cast<T>(xUT->getSomething(T::getUnoTunnelId()));
+ }
+
+ // Takes an interface
+ template <class T> T* getFromUnoTunnel(const css::uno::Reference<css::uno::XInterface>& xIface)
+ {
+ return getFromUnoTunnel<T>(
+ css::uno::Reference<css::lang::XUnoTunnel>{ xIface, css::uno::UNO_QUERY });
+ }
+
+ // Takes an Any
+ template <class T> T* getFromUnoTunnel(const css::uno::Any& rAny)
+ {
+ // For unclear reason, using a Reference ctor taking an Any
+ // gives different results compared to use of operator >>=.
+ css::uno::Reference<css::lang::XUnoTunnel> xUnoTunnel;
+ rAny >>= xUnoTunnel;
+ return getFromUnoTunnel<T>(xUnoTunnel);
+ }
+
+ 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;
+ }
+
+ template <class Base> struct FallbackToGetSomethingOf
+ {
+ static sal_Int64 get(const css::uno::Sequence<sal_Int8>& rId, Base* p)
+ {
+ return p->Base::getSomething(rId);
+ }
+ };
+
+ template <> struct FallbackToGetSomethingOf<void>
+ {
+ static sal_Int64 get(const css::uno::Sequence<sal_Int8>&, void*) { return 0; }
+ };
+
+ template <class T, class Base = void>
+ sal_Int64 getSomethingImpl(const css::uno::Sequence<sal_Int8>& rId, T* pThis,
+ FallbackToGetSomethingOf<Base> = {})
+ {
+ if (isUnoTunnelId<T>(rId))
+ return getSomething_cast(pThis);
+
+ return FallbackToGetSomethingOf<Base>::get(rId, pThis);
+ }
+
+}
+
+/** 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::getFromUnoTunnel<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 comphelper::UnoIdInit 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 ) \
+{ \
+ return comphelper::getSomethingImpl(rId, this); \
+}
+
+#define UNO3_GETIMPLEMENTATION2_IMPL( classname, baseclass )\
+UNO3_GETIMPLEMENTATION_BASE_IMPL(classname)\
+sal_Int64 SAL_CALL classname::getSomething( const css::uno::Sequence< sal_Int8 >& rId ) \
+{ \
+ return comphelper::getSomethingImpl(rId, this, comphelper::FallbackToGetSomethingOf<baseclass>{}); \
+}
+
+
+#endif // INCLUDED_COMPHELPER_SERVICEHELPER_HXX
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */