implbase.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#ifndef INCLUDED_CPPUHELPER_IMPLBASE_HXX
#define INCLUDED_CPPUHELPER_IMPLBASE_HXX
 
#include "sal/config.h"
 
#include <cstddef>
#include <utility>
 
#include "com/sun/star/lang/XTypeProvider.hpp"
#include "com/sun/star/uno/Any.h"
#include "com/sun/star/uno/Sequence.hxx"
#include "com/sun/star/uno/Type.h"
#include "cppuhelper/implbase_ex.hxx"
#include "cppuhelper/weak.hxx"
#include "rtl/instance.hxx"
#include "sal/types.h"
 
#if defined LIBO_INTERNAL_ONLY
 
// A replacement for ImplHelperN has deliberately been left out, as ImplHelperN
// is unlikely ever be a better choice than WeakImplHelper, so all their
// existing uses are probably confused and should use WeakImplHelper instead.
//
// Replacements for WeakAggImplHelperN and AggImplInheritanceHelperN have
// deliberately been left out, as the underlying aggregation mechanism is known
// broken in general and should not be used.
 
namespace cppu {
 
 
namespace detail {
 
template<std::size_t N> struct class_dataN {
    sal_Int16 m_nTypes;
    sal_Bool m_storedTypeRefs;
    sal_Bool m_storedId;
    sal_Int8 m_id[16];
    type_entry m_typeEntries[N + 1];
};
 
template<typename Impl, typename... Ifc> struct ImplClassData {
    class_data * operator ()() {
        static class_dataN<sizeof... (Ifc)> s_cd = {
            sizeof... (Ifc) + 1, false, false, {},
            {
                { { Ifc::static_type },
                  (reinterpret_cast<sal_IntPtr>(
                      static_cast<Ifc *>(reinterpret_cast<Impl *>(16)))
                   - 16)
                }...,
                CPPUHELPER_DETAIL_TYPEENTRY(css::lang::XTypeProvider)
            }
        };
        return reinterpret_cast<class_data *>(&s_cd);
    }
};
 
}
 
 
template<typename... Ifc>
class SAL_NO_VTABLE SAL_DLLPUBLIC_TEMPLATE WeakImplHelper:
    public OWeakObject, public css::lang::XTypeProvider, public Ifc...
{
    struct cd:
        rtl::StaticAggregate<
            class_data, detail::ImplClassData<WeakImplHelper, Ifc...>>
    {};
 
protected:
    WeakImplHelper() {}
 
    virtual ~WeakImplHelper() override {}
 
public:
    WeakImplHelper(WeakImplHelper const &) = default;
    WeakImplHelper(WeakImplHelper &&) = default;
    WeakImplHelper & operator =(WeakImplHelper const &) = default;
    WeakImplHelper & operator =(WeakImplHelper &&) = default;
 
    css::uno::Any SAL_CALL queryInterface(css::uno::Type const & aType) override
    { return WeakImplHelper_query(aType, cd::get(), this, this); }
 
    void SAL_CALL acquire() SAL_NOEXCEPT override { OWeakObject::acquire(); }
 
    void SAL_CALL release() SAL_NOEXCEPT override { OWeakObject::release(); }
 
    css::uno::Sequence<css::uno::Type> SAL_CALL getTypes() override
    { return WeakImplHelper_getTypes(cd::get()); }
 
    css::uno::Sequence<sal_Int8> SAL_CALL getImplementationId() override
    { return css::uno::Sequence<sal_Int8>(); }
};
 
template<typename BaseClass, typename... Ifc>
class SAL_NO_VTABLE SAL_DLLPUBLIC_TEMPLATE ImplInheritanceHelper:
    public BaseClass, public Ifc...
{
    struct cd:
        rtl::StaticAggregate<
            class_data, detail::ImplClassData<ImplInheritanceHelper, Ifc...>>
    {};
 
protected:
    template<typename... Arg> ImplInheritanceHelper(Arg &&... arg):
        BaseClass(std::forward<Arg>(arg)...)
    {}
 
    virtual ~ImplInheritanceHelper() {}
 
public:
    ImplInheritanceHelper(ImplInheritanceHelper const &) = default;
    ImplInheritanceHelper(ImplInheritanceHelper &&) = default;
    ImplInheritanceHelper & operator =(ImplInheritanceHelper const &) = default;
    ImplInheritanceHelper & operator =(ImplInheritanceHelper &&) = default;
 
    css::uno::Any SAL_CALL queryInterface(css::uno::Type const & aType) override
    {
        css::uno::Any ret(ImplHelper_queryNoXInterface(aType, cd::get(), this));
        return ret.hasValue() ? ret : BaseClass::queryInterface(aType);
    }
 
    void SAL_CALL acquire() SAL_NOEXCEPT override { BaseClass::acquire(); }
 
    void SAL_CALL release() SAL_NOEXCEPT override { BaseClass::release(); }
 
    css::uno::Sequence<css::uno::Type> SAL_CALL getTypes() override
    { return ImplInhHelper_getTypes(cd::get(), BaseClass::getTypes()); }
 
    css::uno::Sequence<sal_Int8> SAL_CALL getImplementationId() override
    { return css::uno::Sequence<sal_Int8>(); }
};
 
}
 
#endif
 
#endif
 
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