/* -*- 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 .
 */

#include <comphelper/propmultiplex.hxx>
#include <osl/diagnose.h>


namespace comphelper
{


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


//= OPropertyChangeListener


OPropertyChangeListener::~OPropertyChangeListener()
{
    if (m_pAdapter)
        m_pAdapter->dispose();
}


void OPropertyChangeListener::_disposing(const EventObject&)
    throw (RuntimeException, std::exception)
{
    // nothing to do here
}


void OPropertyChangeListener::disposeAdapter()
{
    if ( m_pAdapter )
        m_pAdapter->dispose();

    // will automatically set a new adapter
    OSL_ENSURE( !m_pAdapter, "OPropertyChangeListener::disposeAdapter: what did dispose do?" );
}


void OPropertyChangeListener::setAdapter(OPropertyChangeMultiplexer* pAdapter)
{
    if (m_pAdapter)
    {
        ::osl::MutexGuard aGuard(m_rMutex);
        m_pAdapter->release();
        m_pAdapter = NULL;
    }

    if (pAdapter)
    {
        ::osl::MutexGuard aGuard(m_rMutex);
        m_pAdapter = pAdapter;
        m_pAdapter->acquire();
    }
}


//= OPropertyChangeMultiplexer


OPropertyChangeMultiplexer::OPropertyChangeMultiplexer(OPropertyChangeListener* _pListener, const  Reference< XPropertySet>& _rxSet, bool _bAutoReleaseSet)
            :m_xSet(_rxSet)
            ,m_pListener(_pListener)
            ,m_nLockCount(0)
            ,m_bListening(false)
            ,m_bAutoSetRelease(_bAutoReleaseSet)
{
    m_pListener->setAdapter(this);
}


OPropertyChangeMultiplexer::~OPropertyChangeMultiplexer()
{
}


void OPropertyChangeMultiplexer::lock()
{
    ++m_nLockCount;
}


void OPropertyChangeMultiplexer::unlock()
{
    --m_nLockCount;
}


void OPropertyChangeMultiplexer::dispose()
{
    if (m_bListening)
    {
        Reference< XPropertyChangeListener> xPreventDelete(this);

        const OUString* pProperties = m_aProperties.getConstArray();
        for (sal_Int32 i = 0; i < m_aProperties.getLength(); ++i, ++pProperties)
            m_xSet->removePropertyChangeListener(*pProperties, static_cast< XPropertyChangeListener*>(this));

        m_pListener->setAdapter(NULL);

        m_pListener = NULL;
        m_bListening = false;

        if (m_bAutoSetRelease)
            m_xSet = NULL;
    }
}

// XEventListener

void SAL_CALL OPropertyChangeMultiplexer::disposing( const  EventObject& _rSource) throw( RuntimeException, std::exception)
{
    if (m_pListener)
    {
         // tell the listener
        if (!locked())
            m_pListener->_disposing(_rSource);
        // disconnect the listener
        if (m_pListener)    // may have been reset whilest calling into _disposing
            m_pListener->setAdapter(NULL);
    }

    m_pListener = NULL;
    m_bListening = false;

    if (m_bAutoSetRelease)
        m_xSet = NULL;
}

// XPropertyChangeListener

void SAL_CALL OPropertyChangeMultiplexer::propertyChange( const  PropertyChangeEvent& _rEvent ) throw( RuntimeException, std::exception)
{
    if (m_pListener && !locked())
        m_pListener->_propertyChanged(_rEvent);
}


void OPropertyChangeMultiplexer::addProperty(const OUString& _sPropertyName)
{
    if (m_xSet.is())
    {
        m_xSet->addPropertyChangeListener(_sPropertyName, static_cast< XPropertyChangeListener*>(this));
        m_aProperties.realloc(m_aProperties.getLength() + 1);
        m_aProperties.getArray()[m_aProperties.getLength()-1] = _sPropertyName;
        m_bListening = true;
    }
}


}


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