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Diffstat (limited to 'unotools/source/misc/sharedunocomponent.cxx')
| -rw-r--r-- | unotools/source/misc/sharedunocomponent.cxx | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/unotools/source/misc/sharedunocomponent.cxx b/unotools/source/misc/sharedunocomponent.cxx new file mode 100644 index 000000000..41a383d10 --- /dev/null +++ b/unotools/source/misc/sharedunocomponent.cxx @@ -0,0 +1,199 @@ +/* -*- 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 <sal/config.h> +#include <osl/diagnose.h> + +#include <unotools/sharedunocomponent.hxx> +#include <com/sun/star/lang/XComponent.hpp> +#include <com/sun/star/util/CloseVetoException.hpp> +#include <com/sun/star/util/XCloseable.hpp> +#include <cppuhelper/implbase.hxx> +#include <tools/debug.hxx> +#include <tools/diagnose_ex.h> + +namespace utl +{ + + using ::com::sun::star::uno::XInterface; + using ::com::sun::star::uno::Reference; + using ::com::sun::star::uno::Exception; + using ::com::sun::star::uno::UNO_QUERY; + using ::com::sun::star::lang::EventObject; + using ::com::sun::star::util::XCloseable; + using ::com::sun::star::util::XCloseListener; + using ::com::sun::star::util::CloseVetoException; + + //= DisposableComponent + + DisposableComponent::DisposableComponent( const Reference< XInterface >& _rxComponent ) + :m_xComponent( _rxComponent, UNO_QUERY ) + { + DBG_ASSERT( m_xComponent.is() || !_rxComponent.is(), "DisposableComponent::DisposableComponent: should be an XComponent!" ); + } + + DisposableComponent::~DisposableComponent() + { + if ( m_xComponent.is() ) + { + try + { + m_xComponent->dispose(); + } + catch( const Exception& ) + { + TOOLS_WARN_EXCEPTION( "unotools", "DisposableComponent::~DisposableComponent" ); + } + m_xComponent.clear(); + } + } + + typedef ::cppu::WeakImplHelper < XCloseListener + > CloseableComponentImpl_Base; + class CloseableComponentImpl : public CloseableComponentImpl_Base + { + private: + Reference< XCloseable > m_xCloseable; + + CloseableComponentImpl(const CloseableComponentImpl&) = delete; + CloseableComponentImpl& operator=(const CloseableComponentImpl&) = delete; + + public: + explicit CloseableComponentImpl( const Reference< XInterface >& _rxComponent ); + + /** closes the component + + @nofail + */ + void nf_closeComponent(); + + protected: + virtual ~CloseableComponentImpl() override; + + // XCloseListener overridables + virtual void SAL_CALL queryClosing( const EventObject& Source, sal_Bool GetsOwnership ) override; + virtual void SAL_CALL notifyClosing( const EventObject& Source ) override; + + // XEventListener overridables + virtual void SAL_CALL disposing( const css::lang::EventObject& Source ) override; + + private: + /** starts or stops being a CloseListener at the component + + Only to be called upon construction of the instance, or when the component + is to be closed. + + @nofail + */ + void impl_nf_switchListening( bool _bListen ); + }; + + CloseableComponentImpl::CloseableComponentImpl( const Reference< XInterface >& _rxComponent ) + :m_xCloseable( _rxComponent, UNO_QUERY ) + { + DBG_ASSERT( m_xCloseable.is() || !_rxComponent.is(), "CloseableComponentImpl::CloseableComponentImpl: component is not an XCloseable!" ); + impl_nf_switchListening( true ); + } + + CloseableComponentImpl::~CloseableComponentImpl() + { + nf_closeComponent(); + } + + void CloseableComponentImpl::nf_closeComponent() + { + if ( !m_xCloseable.is() ) + // nothing to do + return; + + // stop listening + impl_nf_switchListening( false ); + + // close + try + { + m_xCloseable->close( true ); + } + catch( const CloseVetoException& ) { /* fine */ } + catch( const Exception& ) + { + TOOLS_WARN_EXCEPTION( "unotools", "CloseableComponentImpl::nf_closeComponent: caught an unexpected exception!" ); + } + + // reset + m_xCloseable.clear(); + } + + void CloseableComponentImpl::impl_nf_switchListening( bool _bListen ) + { + if ( !m_xCloseable.is() ) + return; + + try + { + if ( _bListen ) + m_xCloseable->addCloseListener( this ); + else + m_xCloseable->removeCloseListener( this ); + } + catch( const Exception& ) + { + TOOLS_WARN_EXCEPTION( "unotools", "CloseableComponentImpl::impl_nf_switchListening" ); + } + } + + void SAL_CALL CloseableComponentImpl::queryClosing( const EventObject& Source, sal_Bool /*GetsOwnership*/ ) + { + // as long as we live, somebody wants to keep the object alive. So, veto the + // closing + DBG_ASSERT( Source.Source == m_xCloseable, "CloseableComponentImpl::queryClosing: where did this come from?" ); + throw CloseVetoException(); + } + + void SAL_CALL CloseableComponentImpl::notifyClosing( const EventObject& Source ) + { + DBG_ASSERT( Source.Source == m_xCloseable, "CloseableComponentImpl::notifyClosing: where did this come from?" ); + + // this should be unreachable: As long as we're a CloseListener, we veto the closing. If we're going + // to close the component ourself, then we revoke ourself as listener *before* the close call. So, + // if this here fires, something went definitely wrong. + OSL_FAIL( "CloseableComponentImpl::notifyClosing: unreachable!" ); + } + + void SAL_CALL CloseableComponentImpl::disposing( const EventObject& Source ) + { + DBG_ASSERT( Source.Source == m_xCloseable, "CloseableComponentImpl::disposing: where did this come from?" ); + OSL_FAIL( "CloseableComponentImpl::disposing: unreachable!" ); + // same reasoning for this assertion as in ->notifyClosing + } + + CloseableComponent::CloseableComponent( const Reference< XInterface >& _rxComponent ) + :m_pImpl( new CloseableComponentImpl( _rxComponent ) ) + { + } + + CloseableComponent::~CloseableComponent() + { + // close the component, deliver ownership to anybody who wants to veto the close + m_pImpl->nf_closeComponent(); + } + +} // namespace utl + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |