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-rw-r--r--comphelper/source/misc/instancelocker.cxx446
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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 <cppuhelper/supportsservice.hxx>
+
+#include <com/sun/star/util/CloseVetoException.hpp>
+#include <com/sun/star/util/XCloseBroadcaster.hpp>
+#include <com/sun/star/util/XCloseable.hpp>
+#include <com/sun/star/lang/DisposedException.hpp>
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/frame/XDesktop.hpp>
+#include <com/sun/star/frame/TerminationVetoException.hpp>
+#include <com/sun/star/frame/DoubleInitializationException.hpp>
+#include <com/sun/star/embed/Actions.hpp>
+#include <com/sun/star/embed/XActionsApproval.hpp>
+#include <utility>
+
+#include "instancelocker.hxx"
+
+namespace com::sun::star::uno { class XComponentContext; }
+
+using namespace ::com::sun::star;
+
+
+// OInstanceLocker
+
+
+OInstanceLocker::OInstanceLocker()
+: m_bDisposed( false )
+, m_bInitialized( false )
+{
+}
+
+
+OInstanceLocker::~OInstanceLocker()
+{
+ if ( !m_bDisposed )
+ {
+ osl_atomic_increment(&m_refCount); // to call dispose
+ try {
+ dispose();
+ }
+ catch ( uno::RuntimeException& )
+ {}
+ }
+}
+
+// XComponent
+
+void SAL_CALL OInstanceLocker::dispose()
+{
+ std::unique_lock aGuard( m_aMutex );
+
+ if ( m_bDisposed )
+ throw lang::DisposedException();
+
+ lang::EventObject aSource( static_cast< ::cppu::OWeakObject* >(this) );
+ m_aListenersContainer.disposeAndClear( aGuard, aSource );
+ if ( m_xLockListener.is() )
+ {
+ auto tmp = std::move(m_xLockListener);
+ aGuard.unlock();
+ tmp->Dispose();
+ aGuard.lock();
+ }
+
+ m_bDisposed = true;
+}
+
+
+void SAL_CALL OInstanceLocker::addEventListener( const uno::Reference< lang::XEventListener >& xListener )
+{
+ std::unique_lock aGuard( m_aMutex );
+ if ( m_bDisposed )
+ throw lang::DisposedException(); // TODO
+
+ m_aListenersContainer.addInterface( aGuard, xListener );
+}
+
+
+void SAL_CALL OInstanceLocker::removeEventListener( const uno::Reference< lang::XEventListener >& xListener )
+{
+ std::unique_lock aGuard( m_aMutex );
+ m_aListenersContainer.removeInterface( aGuard, xListener );
+}
+
+// XInitialization
+
+void SAL_CALL OInstanceLocker::initialize( const uno::Sequence< uno::Any >& aArguments )
+{
+ std::unique_lock aGuard( m_aMutex );
+ if ( m_bInitialized )
+ throw frame::DoubleInitializationException();
+
+ if ( m_bDisposed )
+ throw lang::DisposedException(); // TODO
+
+ if ( !m_refCount )
+ throw uno::RuntimeException(); // the object must be refcounted already!
+
+ uno::Reference< uno::XInterface > xInstance;
+ uno::Reference< embed::XActionsApproval > xApproval;
+
+ try
+ {
+ sal_Int32 nLen = aArguments.getLength();
+ if ( nLen < 2 || nLen > 3 )
+ throw lang::IllegalArgumentException(
+ "Wrong count of parameters!",
+ uno::Reference< uno::XInterface >(),
+ 0 );
+
+ if ( !( aArguments[0] >>= xInstance ) || !xInstance.is() )
+ throw lang::IllegalArgumentException(
+ "Nonempty reference is expected as the first argument!",
+ uno::Reference< uno::XInterface >(),
+ 0 );
+
+ sal_Int32 nModes = 0;
+ if (
+ !( aArguments[1] >>= nModes ) ||
+ (
+ !( nModes & embed::Actions::PREVENT_CLOSE ) &&
+ !( nModes & embed::Actions::PREVENT_TERMINATION )
+ )
+ )
+ {
+ throw lang::IllegalArgumentException(
+ "The correct modes set is expected as the second argument!",
+ uno::Reference< uno::XInterface >(),
+ 0 );
+ }
+
+ if ( nLen == 3 && !( aArguments[2] >>= xApproval ) )
+ throw lang::IllegalArgumentException(
+ "If the third argument is provided, it must be XActionsApproval implementation!",
+ uno::Reference< uno::XInterface >(),
+ 0 );
+
+ m_xLockListener = new OLockListener( uno::Reference< lang::XComponent > ( static_cast< lang::XComponent* >( this ) ),
+ xInstance,
+ nModes,
+ xApproval );
+ m_xLockListener->Init();
+ }
+ catch( uno::Exception& )
+ {
+ aGuard.unlock();
+ dispose();
+ throw;
+ }
+
+ m_bInitialized = true;
+}
+
+// XServiceInfo
+OUString SAL_CALL OInstanceLocker::getImplementationName( )
+{
+ return "com.sun.star.comp.embed.InstanceLocker";
+}
+
+sal_Bool SAL_CALL OInstanceLocker::supportsService( const OUString& ServiceName )
+{
+ return cppu::supportsService(this, ServiceName);
+}
+
+uno::Sequence< OUString > SAL_CALL OInstanceLocker::getSupportedServiceNames()
+{
+ return { "com.sun.star.embed.InstanceLocker" };
+}
+
+// OLockListener
+
+
+OLockListener::OLockListener( uno::WeakReference< lang::XComponent > xWrapper,
+ uno::Reference< uno::XInterface > xInstance,
+ sal_Int32 nMode,
+ uno::Reference< embed::XActionsApproval > xApproval )
+: m_xInstance(std::move( xInstance ))
+, m_xApproval(std::move( xApproval ))
+, m_xWrapper(std::move( xWrapper ))
+, m_bDisposed( false )
+, m_bInitialized( false )
+, m_nMode( nMode )
+{
+}
+
+
+OLockListener::~OLockListener()
+{
+}
+
+
+void OLockListener::Dispose()
+{
+ std::unique_lock aGuard( m_aMutex );
+
+ if ( m_bDisposed )
+ return;
+
+ auto xInstance = std::move(m_xInstance);
+ auto xApproval = std::move(m_xApproval);
+ auto nMode = m_nMode;
+ m_bDisposed = true;
+ aGuard.unlock();
+
+ if ( nMode & embed::Actions::PREVENT_CLOSE )
+ {
+ try
+ {
+ uno::Reference< util::XCloseBroadcaster > xCloseBroadcaster( xInstance, uno::UNO_QUERY );
+ if ( xCloseBroadcaster.is() )
+ xCloseBroadcaster->removeCloseListener( static_cast< util::XCloseListener* >( this ) );
+
+ uno::Reference< util::XCloseable > xCloseable( xInstance, uno::UNO_QUERY );
+ if ( xCloseable.is() )
+ xCloseable->close( true );
+ }
+ catch( uno::Exception& )
+ {}
+ }
+
+ if ( nMode & embed::Actions::PREVENT_TERMINATION )
+ {
+ try
+ {
+ uno::Reference< frame::XDesktop > xDesktop( xInstance, uno::UNO_QUERY_THROW );
+ xDesktop->removeTerminateListener( static_cast< frame::XTerminateListener* >( this ) );
+ }
+ catch( uno::Exception& )
+ {}
+ }
+}
+
+// XEventListener
+
+void SAL_CALL OLockListener::disposing( const lang::EventObject& aEvent )
+{
+ std::unique_lock aGuard( m_aMutex );
+
+ // object is disposed
+ if ( aEvent.Source != m_xInstance )
+ return;
+
+ // the object does not listen for anything any more
+ m_nMode = 0;
+
+ // dispose the wrapper;
+ uno::Reference< lang::XComponent > xComponent( m_xWrapper.get(), uno::UNO_QUERY );
+ aGuard.unlock();
+ if ( xComponent.is() )
+ {
+ try { xComponent->dispose(); }
+ catch( uno::Exception& ){}
+ }
+}
+
+
+// XCloseListener
+
+void SAL_CALL OLockListener::queryClosing( const lang::EventObject& aEvent, sal_Bool )
+{
+ // GetsOwnership parameter is always ignored, the user of the service must close the object always
+ std::unique_lock aGuard( m_aMutex );
+ if ( !(!m_bDisposed && aEvent.Source == m_xInstance && ( m_nMode & embed::Actions::PREVENT_CLOSE )) )
+ return;
+
+ try
+ {
+ uno::Reference< embed::XActionsApproval > xApprove = m_xApproval;
+
+ // unlock the mutex here
+ aGuard.unlock();
+
+ if ( xApprove.is() && xApprove->approveAction( embed::Actions::PREVENT_CLOSE ) )
+ throw util::CloseVetoException();
+ }
+ catch( util::CloseVetoException& )
+ {
+ // rethrow this exception
+ throw;
+ }
+ catch( uno::Exception& )
+ {
+ // no action should be done
+ }
+}
+
+
+void SAL_CALL OLockListener::notifyClosing( const lang::EventObject& aEvent )
+{
+ std::unique_lock aGuard( m_aMutex );
+
+ // object is closed, no reason to listen
+ if ( aEvent.Source != m_xInstance )
+ return;
+
+ uno::Reference< util::XCloseBroadcaster > xCloseBroadcaster( aEvent.Source, uno::UNO_QUERY );
+ if ( !xCloseBroadcaster.is() )
+ return;
+
+ xCloseBroadcaster->removeCloseListener( static_cast< util::XCloseListener* >( this ) );
+ m_nMode &= ~embed::Actions::PREVENT_CLOSE;
+ if ( !m_nMode )
+ {
+ // dispose the wrapper;
+ uno::Reference< lang::XComponent > xComponent( m_xWrapper.get(), uno::UNO_QUERY );
+ aGuard.unlock();
+ if ( xComponent.is() )
+ {
+ try { xComponent->dispose(); }
+ catch( uno::Exception& ){}
+ }
+ }
+}
+
+
+// XTerminateListener
+
+void SAL_CALL OLockListener::queryTermination( const lang::EventObject& aEvent )
+{
+ std::unique_lock aGuard( m_aMutex );
+ if ( !(aEvent.Source == m_xInstance && ( m_nMode & embed::Actions::PREVENT_TERMINATION )) )
+ return;
+
+ try
+ {
+ uno::Reference< embed::XActionsApproval > xApprove = m_xApproval;
+
+ // unlock the mutex here
+ aGuard.unlock();
+
+ if ( xApprove.is() && xApprove->approveAction( embed::Actions::PREVENT_TERMINATION ) )
+ throw frame::TerminationVetoException();
+ }
+ catch( frame::TerminationVetoException& )
+ {
+ // rethrow this exception
+ throw;
+ }
+ catch( uno::Exception& )
+ {
+ // no action should be done
+ }
+}
+
+
+void SAL_CALL OLockListener::notifyTermination( const lang::EventObject& aEvent )
+{
+ std::unique_lock aGuard( m_aMutex );
+
+ // object is terminated, no reason to listen
+ if ( aEvent.Source != m_xInstance )
+ return;
+
+ uno::Reference< frame::XDesktop > xDesktop( aEvent.Source, uno::UNO_QUERY );
+ if ( !xDesktop.is() )
+ return;
+
+ try
+ {
+ xDesktop->removeTerminateListener( static_cast< frame::XTerminateListener* >( this ) );
+ m_nMode &= ~embed::Actions::PREVENT_TERMINATION;
+ if ( !m_nMode )
+ {
+ // dispose the wrapper;
+ uno::Reference< lang::XComponent > xComponent( m_xWrapper.get(), uno::UNO_QUERY );
+ aGuard.unlock();
+ if ( xComponent.is() )
+ {
+ try { xComponent->dispose(); }
+ catch( uno::Exception& ){}
+ }
+ }
+ }
+ catch( uno::Exception& )
+ {}
+}
+
+
+// XInitialization
+
+void OLockListener::Init()
+{
+ std::unique_lock aGuard( m_aMutex );
+
+ if ( m_bDisposed || m_bInitialized )
+ return;
+
+ try
+ {
+ if ( m_nMode & embed::Actions::PREVENT_CLOSE )
+ {
+ uno::Reference< util::XCloseBroadcaster > xCloseBroadcaster( m_xInstance, uno::UNO_QUERY_THROW );
+ xCloseBroadcaster->addCloseListener( static_cast< util::XCloseListener* >( this ) );
+ }
+
+ if ( m_nMode & embed::Actions::PREVENT_TERMINATION )
+ {
+ uno::Reference< frame::XDesktop > xDesktop( m_xInstance, uno::UNO_QUERY_THROW );
+ xDesktop->addTerminateListener( static_cast< frame::XTerminateListener* >( this ) );
+ }
+ }
+ catch( uno::Exception& )
+ {
+ // dispose the wrapper;
+ uno::Reference< lang::XComponent > xComponent( m_xWrapper.get(), uno::UNO_QUERY );
+ aGuard.unlock();
+ if ( xComponent.is() )
+ {
+ try { xComponent->dispose(); }
+ catch( uno::Exception& ){}
+ }
+
+ throw;
+ }
+
+ m_bInitialized = true;
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *
+com_sun_star_comp_embed_InstanceLocker(
+ css::uno::XComponentContext *,
+ css::uno::Sequence<css::uno::Any> const &)
+{
+ return cppu::acquire(new OInstanceLocker());
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */