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| -rw-r--r-- | include/comphelper/servicedecl.hxx | 337 |
1 files changed, 337 insertions, 0 deletions
diff --git a/include/comphelper/servicedecl.hxx b/include/comphelper/servicedecl.hxx new file mode 100644 index 000000000..8175b2f96 --- /dev/null +++ b/include/comphelper/servicedecl.hxx @@ -0,0 +1,337 @@ +/* -*- 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_SERVICEDECL_HXX +#define INCLUDED_COMPHELPER_SERVICEDECL_HXX + +#include <comphelper/comphelperdllapi.h> +#include <cppuhelper/implbase.hxx> +#include <com/sun/star/uno/XComponentContext.hpp> +#include <com/sun/star/lang/XServiceInfo.hpp> + +#include <functional> +#include <initializer_list> + +namespace comphelper { +namespace service_decl { + +class ServiceDecl; + +namespace detail { +typedef ::std::function< + css::uno::Reference<css::uno::XInterface> /* return */ + (ServiceDecl const&, + css::uno::Sequence<css::uno::Any> const&, + css::uno::Reference<css::uno::XComponentContext> const&)> CreateFuncF; +} + +/** Class to declare a service implementation. There is no need to implement + lang::XServiceInfo nor lang::XInitialization anymore. + The declaration can be done in various ways, the (simplest) form is + + <pre> + class MyClass : public cppu::WeakImplHelper<XInterface1, XInterface2> { + public: + MyClass( uno::Reference<uno::XComponentContext> const& xContext ) + [...] + }; + [...] + namespace sdecl = comphelper::service_decl; + sdecl::ServiceDecl const myDecl( + sdecl::class_<MyClass>(), + "my.unique.implementation.name", + "MyServiceSpec1;MyServiceSpec2" ); + </pre> + + If the service demands initialization by arguments, the implementation + class has to define a constructor taking both arguments and component + context: + + <pre> + class MyClass : public cppu::WeakImplHelper<XInterface1, XInterface2> { + public: + MyClass( uno::Sequence<uno::Any> const& args, + uno::Reference<uno:XComponentContext> const& xContext ) + [...] + }; + [...] + namespace sdecl = comphelper::service_decl; + sdecl::ServiceDecl const myDecl( + sdecl::class_<MyClass, sdecl::with_args<true> >(), + "my.unique.implementation.name", + "MyServiceSpec1;MyServiceSpec2" ); + </pre> + + Additionally, there is the possibility to process some code after creation, + e.g. to add the newly created object as a listener or perform aggregation + (C++-UNO only): + + <pre> + uno::Reference<uno::XInterface> somePostProcCode( MyClass * p ); + [...] + namespace sdecl = comphelper::service_decl; + sdecl::ServiceDecl const myDecl( + sdecl::class_<MyClass, ... >(&somePostProcCode), + "my.unique.implementation.name", + "MyServiceSpec1;MyServiceSpec2" ); + </pre> + + In the latter case, somePostProcCode gets the yet unacquired "raw" pointer. +*/ +class COMPHELPER_DLLPUBLIC ServiceDecl +{ +public: + /** Ctor for multiple supported service names. + + @param implClass implementation class description + @param pImplName implementation name + @param pSupportedServiceNames supported service names + @param cDelim delimiter for supported service names + */ + ServiceDecl( const ServiceDecl& ) = delete; + ServiceDecl& operator=( const ServiceDecl& ) = delete; + template <typename ImplClassT> + ServiceDecl( ImplClassT const& implClass, + char const* pImplName, + char const* pSupportedServiceNames ) + : m_createFunc(implClass.m_createFunc), + m_pImplName(pImplName), + m_pServiceNames(pSupportedServiceNames) {} + + /// @internal gets called by component_getFactoryHelper() + void * getFactory( char const* pImplName ) const; + + /// @return supported service names + css::uno::Sequence< OUString> getSupportedServiceNames() const; + + /// @return whether name is in set of supported service names + bool supportsService( OUString const& name ) const; + + /// @return implementation name + OUString getImplementationName() const; + +private: + class Factory; + friend class Factory; + + detail::CreateFuncF const m_createFunc; + char const* const m_pImplName; + char const* const m_pServiceNames; +}; + +/** To specify whether the implementation class expects arguments + (uno::Sequence<uno::Any>). +*/ +template <bool> struct with_args; + +/// @internal +namespace detail { +template <typename ImplT> +class OwnServiceImpl + : public ImplT +{ + typedef ImplT BaseT; + +public: + OwnServiceImpl( const OwnServiceImpl& ) = delete; + OwnServiceImpl& operator=( const OwnServiceImpl& ) = delete; + OwnServiceImpl( + ServiceDecl const& rServiceDecl, + css::uno::Sequence<css::uno::Any> const& args, + css::uno::Reference<css::uno::XComponentContext> const& xContext ) + :BaseT(args, xContext), m_rServiceDecl(rServiceDecl) {} + OwnServiceImpl( + ServiceDecl const& rServiceDecl, + css::uno::Reference<css::uno::XComponentContext> const& xContext ) + : BaseT(xContext), m_rServiceDecl(rServiceDecl) {} + + // XServiceInfo + virtual OUString SAL_CALL getImplementationName() override { + return m_rServiceDecl.getImplementationName(); + } + virtual sal_Bool SAL_CALL supportsService( OUString const& name ) override { + return m_rServiceDecl.supportsService(name); + } + virtual css::uno::Sequence< OUString> + SAL_CALL getSupportedServiceNames() override { + return m_rServiceDecl.getSupportedServiceNames(); + } + +private: + ServiceDecl const& m_rServiceDecl; +}; + +template <typename ImplT> +class ServiceImpl final : public OwnServiceImpl< ::cppu::ImplInheritanceHelper<ImplT,css::lang::XServiceInfo> > +{ +typedef OwnServiceImpl< ::cppu::ImplInheritanceHelper<ImplT,css::lang::XServiceInfo> > ServiceImpl_BASE; +public: + ServiceImpl( + ServiceDecl const& rServiceDecl, + css::uno::Sequence<css::uno::Any> const& args, + css::uno::Reference<css::uno::XComponentContext> const& xContext ) + : ServiceImpl_BASE(rServiceDecl, args, xContext) {} + ServiceImpl( + ServiceDecl const& rServiceDecl, + css::uno::Reference<css::uno::XComponentContext> const& xContext ) + : ServiceImpl_BASE(rServiceDecl, xContext) {} +}; + +template <typename ImplT> +class InheritingServiceImpl final : public OwnServiceImpl< ImplT > +{ +typedef OwnServiceImpl< ImplT > ServiceImpl_BASE; +public: + InheritingServiceImpl( + ServiceDecl const& rServiceDecl, + css::uno::Sequence<css::uno::Any> const& args, + css::uno::Reference<css::uno::XComponentContext> const& xContext ) + : ServiceImpl_BASE(rServiceDecl, args, xContext) {} +}; + +template <typename ServiceImplT> +struct PostProcessDefault { + css::uno::Reference<css::uno::XInterface> + operator()( ServiceImplT * p ) const { + return static_cast<css::lang::XServiceInfo *>(p); + } +}; + +template <typename ImplT, typename PostProcessFuncT, typename WithArgsT> +struct CreateFunc; + +template <typename ImplT, typename PostProcessFuncT> +struct CreateFunc<ImplT, PostProcessFuncT, with_args<false> > { + PostProcessFuncT const m_postProcessFunc; + explicit CreateFunc( PostProcessFuncT const& postProcessFunc ) + : m_postProcessFunc(postProcessFunc) {} + + css::uno::Reference<css::uno::XInterface> + operator()( ServiceDecl const& rServiceDecl, + css::uno::Sequence<css::uno::Any> const&, + css::uno::Reference<css::uno::XComponentContext> + const& xContext ) const + { + return m_postProcessFunc( + new ImplT( rServiceDecl, xContext ) ); + } +}; + +template <typename ImplT, typename PostProcessFuncT> +struct CreateFunc<ImplT, PostProcessFuncT, with_args<true> > { + PostProcessFuncT const m_postProcessFunc; + explicit CreateFunc( PostProcessFuncT const& postProcessFunc ) + : m_postProcessFunc(postProcessFunc) {} + + css::uno::Reference<css::uno::XInterface> + operator()( ServiceDecl const& rServiceDecl, + css::uno::Sequence<css::uno::Any> const& args, + css::uno::Reference<css::uno::XComponentContext> + const& xContext ) const + { + return m_postProcessFunc( + new ImplT( rServiceDecl, args, xContext ) ); + } +}; + +} // namespace detail + +/** Defines a service implementation class. + + @tpl ImplT_ service implementation class + @WithArgsT whether the implementation class ctor expects arguments + (uno::Sequence<uno::Any>, uno::Reference<uno::XComponentContext>) + or just (uno::Reference<uno::XComponentContext>) +*/ +template <typename ImplT_, typename WithArgsT = with_args<false> > +struct serviceimpl_base { + typedef ImplT_ ImplT; + + detail::CreateFuncF const m_createFunc; + + typedef detail::PostProcessDefault<ImplT> PostProcessDefaultT; + + /** Default ctor. Implementation class without args, expecting + component context as single argument. + */ + serviceimpl_base() : m_createFunc( + detail::CreateFunc<ImplT, PostProcessDefaultT, WithArgsT>( + PostProcessDefaultT() ) ) {} + + /** Ctor to pass a post processing function/functor. + + @tpl PostProcessDefaultT let your compiler deduce this + @param postProcessFunc function/functor that gets the yet unacquired + ImplT_ pointer returning a + uno::Reference<uno::XInterface> + */ + template <typename PostProcessFuncT> + explicit serviceimpl_base( PostProcessFuncT const& postProcessFunc ) + : m_createFunc( detail::CreateFunc<ImplT, PostProcessFuncT, WithArgsT>( + postProcessFunc ) ) {} +}; + +template <typename ImplT_, typename WithArgsT = with_args<false> > +struct class_ : public serviceimpl_base< detail::ServiceImpl<ImplT_>, WithArgsT > +{ + typedef serviceimpl_base< detail::ServiceImpl<ImplT_>, WithArgsT > baseT; + /** Default ctor. Implementation class without args, expecting + component context as single argument. + */ + class_() : baseT() {} + template <typename PostProcessFuncT> + /** Ctor to pass a post processing function/functor. + + @tpl PostProcessDefaultT let your compiler deduce this + @param postProcessFunc function/functor that gets the yet unacquired + ImplT_ pointer returning a + uno::Reference<uno::XInterface> + */ + explicit class_( PostProcessFuncT const& postProcessFunc ) : baseT( postProcessFunc ) {} +}; + +template <typename ImplT_, typename WithArgsT = with_args<false> > +struct inheritingClass_ : public serviceimpl_base< detail::InheritingServiceImpl<ImplT_>, WithArgsT > +{ + typedef serviceimpl_base< detail::InheritingServiceImpl<ImplT_>, WithArgsT > baseT; + /** Default ctor. Implementation class without args, expecting + component context as single argument. + */ + inheritingClass_() : baseT() {} + template <typename PostProcessFuncT> + /** Ctor to pass a post processing function/functor. + + @tpl PostProcessDefaultT let your compiler deduce this + @param postProcessFunc function/functor that gets the yet unacquired + ImplT_ pointer returning a + uno::Reference<uno::XInterface> + */ + explicit inheritingClass_( PostProcessFuncT const& postProcessFunc ) : baseT( postProcessFunc ) {} +}; + +COMPHELPER_DLLPUBLIC +void* component_getFactoryHelper( const char* pImplName, + std::initializer_list<ServiceDecl const *> args ); + +} // namespace service_decl +} // namespace comphelper + + +#endif // ! defined( INCLUDED_COMPHELPER_SERVICEDECL_HXX) + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |