/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

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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 .

 */

#include <sal/config.h>

#include "proxyaggregation.hxx"

#include <cassert>

#include <com/sun/star/reflection/ProxyFactory.hpp>

namespace accessibility

{

    using namespace ::com::sun::star::uno;

    using namespace ::com::sun::star::lang;

    using namespace ::com::sun::star::reflection;

    OProxyAggregation::OProxyAggregation( const Reference< XComponentContext >& _rxContext )

        :m_xContext( _rxContext )

    {

    }

    void OProxyAggregation::baseAggregateProxyFor( const Reference< XInterface >& _rxComponent, oslInterlockedCount& _rRefCount,

            ::cppu::OWeakObject& _rDelegator )

    {

        // first a factory for the proxy

        Reference< XProxyFactory > xFactory = ProxyFactory::create( m_xContext );

        // then the proxy itself

        { // i36686 OJ: achieve the destruction of the temporary -> otherwise it leads to _rRefCount -= 2

            m_xProxyAggregate = xFactory->createProxy( _rxComponent );

        }

        if ( m_xProxyAggregate.is() )

            m_xProxyAggregate->queryAggregation( cppu::UnoType<decltype(m_xProxyTypeAccess)>::get() ) >>= m_xProxyTypeAccess;

        // aggregate the proxy

        osl_atomic_increment( &_rRefCount );

        if ( m_xProxyAggregate.is() )

        {

            // At this point in time, the proxy has a ref count of exactly two - in m_xControlContextProxy,

            // and in m_xProxyTypeAccess.

            // Remember to _not_ reset these members unless the delegator of the proxy has been reset, too!

            m_xProxyAggregate->setDelegator( _rDelegator );

        }

        osl_atomic_decrement( &_rRefCount );

    }

    Any SAL_CALL OProxyAggregation::queryAggregation( const Type& _rType )

    {

        return m_xProxyAggregate.is() ? m_xProxyAggregate->queryAggregation( _rType ) : Any();

    }

    Sequence< Type > SAL_CALL OProxyAggregation::getTypes(  )

    {

        Sequence< Type > aTypes;

        if ( m_xProxyAggregate.is() )

        {

            if ( m_xProxyTypeAccess.is() )

                aTypes = m_xProxyTypeAccess->getTypes();

        }

        return aTypes;

    }

    OProxyAggregation::~OProxyAggregation()

    {

        if ( m_xProxyAggregate.is() )

            m_xProxyAggregate->setDelegator( nullptr );

        m_xProxyAggregate.clear();

        m_xProxyTypeAccess.clear();

            // this should remove the _two_only_ "real" references (means not delegated to

            // ourself) to this proxy, and thus delete it

    }

    OComponentProxyAggregationHelper::OComponentProxyAggregationHelper( const Reference< XComponentContext >& _rxContext,

        ::cppu::OBroadcastHelper& _rBHelper )

        :OProxyAggregation( _rxContext )

        ,m_rBHelper( _rBHelper )

    {

        OSL_ENSURE( _rxContext.is(), "OComponentProxyAggregationHelper::OComponentProxyAggregationHelper: invalid arguments!" );

    }

    void OComponentProxyAggregationHelper::componentAggregateProxyFor(

        const Reference< XComponent >& _rxComponent, oslInterlockedCount& _rRefCount,

        ::cppu::OWeakObject& _rDelegator )

    {

        OSL_ENSURE( _rxComponent.is(), "OComponentProxyAggregationHelper::componentAggregateProxyFor: invalid inner component!" );

        m_xInner = _rxComponent;

        // aggregate a proxy for the object

        baseAggregateProxyFor( m_xInner, _rRefCount, _rDelegator );

        // add as event listener to the inner context, because we want to be notified of disposals

        osl_atomic_increment( &_rRefCount );

        {

            if ( m_xInner.is() )

                m_xInner->addEventListener( this );

        }

        osl_atomic_decrement( &_rRefCount );

    }

    Any SAL_CALL OComponentProxyAggregationHelper::queryInterface( const Type& _rType )

    {

        Any aReturn( BASE::queryInterface( _rType ) );

        if ( !aReturn.hasValue() )

            aReturn = OProxyAggregation::queryAggregation( _rType );

        return aReturn;

    }

    IMPLEMENT_FORWARD_XTYPEPROVIDER2( OComponentProxyAggregationHelper, BASE, OProxyAggregation )

    OComponentProxyAggregationHelper::~OComponentProxyAggregationHelper( )

    {

        OSL_ENSURE( m_rBHelper.bDisposed, "OComponentProxyAggregationHelper::~OComponentProxyAggregationHelper: you should dispose your derived class in the dtor, if necessary!" );

            // if this asserts, add the following to your derived class dtor:

            // if ( !m_rBHelper.bDisposed )

            // {

            //   acquire(); // to prevent duplicate dtor calls

            //   dispose();

            // }

        m_xInner.clear();

    }

    void SAL_CALL OComponentProxyAggregationHelper::disposing( const EventObject& _rSource )

    {

        if ( _rSource.Source == m_xInner )

        {   // it's our inner context which is dying -> dispose ourself

            if ( !m_rBHelper.bDisposed && !m_rBHelper.bInDispose )

            {   // (if necessary only, of course)

                dispose();

            }

        }

    }

    void SAL_CALL OComponentProxyAggregationHelper::dispose()

    {

        ::osl::MutexGuard aGuard( m_rBHelper.rMutex );

        // dispose our inner context

        // before we do this, remove ourself as listener - else in disposing( EventObject ), we

        // would dispose ourself a second time

        if ( m_xInner.is() )

        {

            m_xInner->removeEventListener( this );

            m_xInner->dispose();

            m_xInner.clear();

        }

    }

    OComponentProxyAggregation::OComponentProxyAggregation( const Reference< XComponentContext >& _rxContext,

            const Reference< XComponent >& _rxComponent )

        :WeakComponentImplHelperBase( m_aMutex )

        ,OComponentProxyAggregationHelper( _rxContext, rBHelper )

    {

        OSL_ENSURE( _rxComponent.is(), "OComponentProxyAggregation::OComponentProxyAggregation: accessible is no XComponent!" );

        if ( _rxComponent.is() )

            componentAggregateProxyFor( _rxComponent, m_refCount, *this );

    }

    OComponentProxyAggregation::~OComponentProxyAggregation()

    {

        if ( !rBHelper.bDisposed )

        {

            acquire();  // to prevent duplicate dtor calls

            dispose();

        }

    }

    IMPLEMENT_FORWARD_XINTERFACE2( OComponentProxyAggregation, WeakComponentImplHelperBase, OComponentProxyAggregationHelper )

    IMPLEMENT_GET_IMPLEMENTATION_ID( OComponentProxyAggregation )

    Sequence< Type > SAL_CALL OComponentProxyAggregation::getTypes(  )

    {

        return comphelper::concatSequences(

                OComponentProxyAggregationHelper::getTypes(),

                // append XComponent, coming from WeakComponentImplHelperBase

                std::initializer_list<Type>{ cppu::UnoType<XComponent>::get() });

    }

    void SAL_CALL OComponentProxyAggregation::disposing( const EventObject& _rSource )

    {

        // Simply disambiguate---this is necessary for MSVC to distinguish

        // "disposing(EventObject)" from "disposing()"; but it is also a good

        // place to check for recursive calls that would be caused by an object

        // being registered as an XEventListener at itself (cf. rhbz#928568):

        assert(_rSource.Source != static_cast< cppu::OWeakObject * >(this));

        OComponentProxyAggregationHelper::disposing( _rSource );

    }

    void SAL_CALL OComponentProxyAggregation::disposing()

    {

        // call the dispose-functionality of the base, which will dispose our aggregated component

        OComponentProxyAggregationHelper::dispose();

    }

    void SAL_CALL OComponentProxyAggregation::dispose()

    {

        // simply disambiguate

        WeakComponentImplHelperBase::dispose();

    }

}   // namespace accessibility

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