weakref.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
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 * 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 .
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/*
 * This file is part of LibreOffice published API.
 */
#ifndef INCLUDED_CPPUHELPER_WEAKREF_HXX
#define INCLUDED_CPPUHELPER_WEAKREF_HXX
 
#include "sal/config.h"
 
#include <cstddef>
 
#include "com/sun/star/uno/Reference.hxx"
#include "com/sun/star/uno/XInterface.hpp"
#include "cppuhelper/cppuhelperdllapi.h"
 
 
namespace com
{
namespace sun
{
namespace star
{
namespace uno
{
 
class OWeakRefListener;
class XWeak;

class CPPUHELPER_DLLPUBLIC WeakReferenceHelper
{
public:
    WeakReferenceHelper()
        : m_pImpl( NULL )
        {}

    WeakReferenceHelper( const WeakReferenceHelper & rWeakRef );
 
#if defined LIBO_INTERNAL_ONLY
    WeakReferenceHelper(WeakReferenceHelper && other) noexcept : m_pImpl(other.m_pImpl)
    { other.m_pImpl = nullptr; }
#endif

    WeakReferenceHelper( const css::uno::Reference< css::uno::XInterface > & xInt );
 
#if defined LIBO_INTERNAL_ONLY
    WeakReferenceHelper( const css::uno::Reference< css::uno::XWeak > & xWeak );
#endif

    ~WeakReferenceHelper();

    WeakReferenceHelper & SAL_CALL operator = ( const WeakReferenceHelper & rWeakRef );
 
#if defined LIBO_INTERNAL_ONLY
    WeakReferenceHelper & operator =(WeakReferenceHelper && other);
#endif

    WeakReferenceHelper & SAL_CALL operator = (
            const css::uno::Reference< css::uno::XInterface > & xInt );
 
#if defined LIBO_INTERNAL_ONLY
    WeakReferenceHelper & operator = (
            const css::uno::Reference< css::uno::XWeak > & xWeak );
#endif

    bool SAL_CALL operator == ( const WeakReferenceHelper & rObj ) const
        { return (get() == rObj.get()); }

    css::uno::Reference< css::uno::XInterface > SAL_CALL get() const;

    SAL_CALL operator Reference< XInterface > () const
        { return get(); }

    void SAL_CALL clear();
 
protected:
    OWeakRefListener * m_pImpl;
};

template< class interface_type >
class SAL_WARN_UNUSED WeakReference : public WeakReferenceHelper
{
public:
    WeakReference()
        : WeakReferenceHelper()
        {}

    WeakReference( const Reference< interface_type > & rRef )
        : WeakReferenceHelper( rRef )
        {}

    WeakReference & SAL_CALL operator = (
            const css::uno::Reference< interface_type > & xInt )
        { WeakReferenceHelper::operator=(xInt); return *this; }
 
#if defined LIBO_INTERNAL_ONLY
    WeakReference & operator = (
            const css::uno::Reference< css::uno::XWeak > & xWeak )
        { WeakReferenceHelper::operator=(xWeak); return *this; }
#endif

    SAL_CALL operator Reference< interface_type > () const
        { return Reference< interface_type >::query( get() ); }
};
 
}
}
}
}
 
#endif
 
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