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/* -*- 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 <unotools/desktopterminationobserver.hxx>
#include <com/sun/star/frame/TerminationVetoException.hpp>
#include <com/sun/star/frame/XTerminateListener.hpp>
#include <com/sun/star/frame/Desktop.hpp>
#include <cppuhelper/implbase.hxx>
#include <comphelper/processfactory.hxx>
#include <osl/diagnose.h>
#include <tools/diagnose_ex.h>
#include <vector>
namespace utl
{
using namespace ::com::sun::star::uno;
using namespace ::com::sun::star::lang;
using namespace ::com::sun::star::frame;
namespace
{
typedef ::std::vector< ITerminationListener* > Listeners;
struct ListenerAdminData
{
Listeners aListeners;
bool bAlreadyTerminated;
bool bCreatedAdapter;
ListenerAdminData() : bAlreadyTerminated( false ), bCreatedAdapter( false ) { }
};
ListenerAdminData& getListenerAdminData()
{
static ListenerAdminData s_aData;
return s_aData;
}
//= OObserverImpl
class OObserverImpl : public ::cppu::WeakImplHelper< XTerminateListener >
{
public:
static void ensureObservation();
private:
OObserverImpl();
virtual ~OObserverImpl() override;
// XTerminateListener
virtual void SAL_CALL queryTermination( const EventObject& Event ) override;
virtual void SAL_CALL notifyTermination( const EventObject& Event ) override;
// XEventListener
virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override;
};
OObserverImpl::OObserverImpl()
{
}
OObserverImpl::~OObserverImpl()
{
}
void OObserverImpl::ensureObservation()
{
{
if ( getListenerAdminData().bCreatedAdapter )
return;
::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
if ( getListenerAdminData().bCreatedAdapter )
return;
getListenerAdminData().bCreatedAdapter = true;
}
try
{
Reference< XDesktop2 > xDesktop = Desktop::create( ::comphelper::getProcessComponentContext() );
xDesktop->addTerminateListener( new OObserverImpl );
}
catch( const Exception& )
{
TOOLS_WARN_EXCEPTION( "unotools", "OObserverImpl::ensureObservation" );
}
}
void SAL_CALL OObserverImpl::queryTermination( const EventObject& /*Event*/ )
{
Listeners aToNotify;
{
::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
aToNotify = getListenerAdminData().aListeners;
}
for (auto const& listener : aToNotify)
{
if ( !listener->queryTermination() )
throw TerminationVetoException();
}
}
void SAL_CALL OObserverImpl::notifyTermination( const EventObject& /*Event*/ )
{
// get the listeners
Listeners aToNotify;
{
::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
OSL_ENSURE( !getListenerAdminData().bAlreadyTerminated, "OObserverImpl::notifyTermination: terminated twice?" );
aToNotify = getListenerAdminData().aListeners;
getListenerAdminData().bAlreadyTerminated = true;
}
// notify the listeners
for (auto const& listener : aToNotify)
{
listener->notifyTermination();
}
// clear the listener container
{
::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
getListenerAdminData().aListeners.clear();
}
}
void SAL_CALL OObserverImpl::disposing( const EventObject& /*Event*/ )
{
#if OSL_DEBUG_LEVEL > 0
::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
OSL_ENSURE( getListenerAdminData().bAlreadyTerminated, "OObserverImpl::disposing: disposing without terminated?" );
#endif
// not interested in
}
}
//= DesktopTerminationObserver
void DesktopTerminationObserver::registerTerminationListener( ITerminationListener* _pListener )
{
if ( !_pListener )
return;
{
::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
if ( getListenerAdminData().bAlreadyTerminated )
{
_pListener->notifyTermination();
return;
}
getListenerAdminData().aListeners.push_back( _pListener );
}
OObserverImpl::ensureObservation();
}
void DesktopTerminationObserver::revokeTerminationListener( ITerminationListener const * _pListener )
{
::osl::MutexGuard aGuard( ::osl::Mutex::getGlobalMutex() );
Listeners& rListeners = getListenerAdminData().aListeners;
rListeners.erase(std::remove(rListeners.begin(), rListeners.end(), _pListener), rListeners.end());
}
} // namespace utl
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