propmultiplex2.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 * 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
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 *   License, Version 2.0 (the "License"); you may not use this file
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#include <com/sun/star/beans/XPropertySet.hpp>
#include <comphelper/propmultiplex2.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;
 
OPropertyChangeListener2::~OPropertyChangeListener2()
{
    if (m_xAdapter.is())
        m_xAdapter->onListenerDestruction();
}
 
void OPropertyChangeListener2::disposeAdapter(std::unique_lock<std::mutex>& rGuard)
{
    if (m_xAdapter.is())
        m_xAdapter->dispose(rGuard);
 
    // will automatically set a new adapter
    OSL_ENSURE(!m_xAdapter.is(), "OPropertyChangeListener::disposeAdapter: what did dispose do?");
}
 
void OPropertyChangeListener2::setAdapter(std::unique_lock<std::mutex>& /*rGuard*/,
                                          OPropertyChangeMultiplexer2* pAdapter)
{
    m_xAdapter = pAdapter;
}
 
OPropertyChangeMultiplexer2::OPropertyChangeMultiplexer2(std::mutex& rMutex,
                                                         std::unique_lock<std::mutex>& rGuard,
                                                         OPropertyChangeListener2* _pListener,
                                                         const Reference<XPropertySet>& _rxSet)
    : m_rMutex(rMutex)
    , m_xSet(_rxSet)
    , m_pListener(_pListener)
    , m_nLockCount(0)
    , m_bListening(false)
{
    m_pListener->setAdapter(rGuard, this);
}
 
OPropertyChangeMultiplexer2::~OPropertyChangeMultiplexer2() {}
 
void OPropertyChangeMultiplexer2::lock() { ++m_nLockCount; }
 
void OPropertyChangeMultiplexer2::unlock() { --m_nLockCount; }
 
void OPropertyChangeMultiplexer2::dispose(std::unique_lock<std::mutex>& rGuard)
{
    if (!m_bListening)
        return;
 
    Reference<XPropertyChangeListener> xPreventDelete(this);
 
    for (const OUString& rProp : m_aProperties)
        m_xSet->removePropertyChangeListener(rProp, static_cast<XPropertyChangeListener*>(this));
 
    m_pListener->setAdapter(rGuard, nullptr);
 
    m_pListener = nullptr;
    m_bListening = false;
 
    m_xSet = nullptr;
}
 
void OPropertyChangeMultiplexer2::onListenerDestruction()
{
    if (!m_bListening)
        return;
 
    Reference<XPropertyChangeListener> xPreventDelete(this);
 
    for (const OUString& rProp : m_aProperties)
        m_xSet->removePropertyChangeListener(rProp, static_cast<XPropertyChangeListener*>(this));
}
 
// XEventListener
 
void SAL_CALL OPropertyChangeMultiplexer2::disposing(const EventObject& /*_rSource*/)
{
    std::unique_lock g(m_rMutex);
    if (m_pListener)
    {
        // disconnect the listener
        if (m_pListener) // may have been reset whilst calling into _disposing
            m_pListener->setAdapter(g, nullptr);
    }
 
    m_pListener = nullptr;
    m_bListening = false;
 
    m_xSet = nullptr;
}
 
// XPropertyChangeListener
 
void SAL_CALL OPropertyChangeMultiplexer2::propertyChange(const PropertyChangeEvent& _rEvent)
{
    if (m_pListener && !locked())
        m_pListener->_propertyChanged(_rEvent);
}
 
void OPropertyChangeMultiplexer2::addProperty(const OUString& _sPropertyName)
{
    if (m_xSet.is())
    {
        m_xSet->addPropertyChangeListener(_sPropertyName,
                                          static_cast<XPropertyChangeListener*>(this));
        m_aProperties.push_back(_sPropertyName);
        m_bListening = true;
    }
}
}
 
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