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-rw-r--r--unotools/source/misc/desktopterminationobserver.cxx188
1 files changed, 188 insertions, 0 deletions
diff --git a/unotools/source/misc/desktopterminationobserver.cxx b/unotools/source/misc/desktopterminationobserver.cxx
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+++ b/unotools/source/misc/desktopterminationobserver.cxx
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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
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */