Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 188 insertions, 0 deletions

diff --git a/unotools/source/misc/desktopterminationobserver.cxx b/unotools/source/misc/desktopterminationobserver.cxx
new file mode 100644
index 000000000..f5ea04bd4
--- /dev/null
+++ b/unotools/source/misc/desktopterminationobserver.cxx
@@ -0,0 +1,188 @@
+/* -*- 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: */