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Diffstat (limited to 'comphelper/source/misc/instancelocker.cxx')
| -rw-r--r-- | comphelper/source/misc/instancelocker.cxx | 446 |
1 files changed, 446 insertions, 0 deletions
diff --git a/comphelper/source/misc/instancelocker.cxx b/comphelper/source/misc/instancelocker.cxx new file mode 100644 index 0000000000..465cc51858 --- /dev/null +++ b/comphelper/source/misc/instancelocker.cxx @@ -0,0 +1,446 @@ +/* -*- 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: */ |