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Diffstat (limited to 'framework/source/fwe/helper/documentundoguard.cxx')
| -rw-r--r-- | framework/source/fwe/helper/documentundoguard.cxx | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/framework/source/fwe/helper/documentundoguard.cxx b/framework/source/fwe/helper/documentundoguard.cxx new file mode 100644 index 000000000..5f7d16041 --- /dev/null +++ b/framework/source/fwe/helper/documentundoguard.cxx @@ -0,0 +1,223 @@ +/* -*- 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 <framework/documentundoguard.hxx> + +#include <com/sun/star/document/XUndoManagerSupplier.hpp> + +#include <cppuhelper/implbase.hxx> +#include <rtl/ref.hxx> +#include <tools/diagnose_ex.h> + +namespace framework +{ + + using ::com::sun::star::uno::Reference; + using ::com::sun::star::uno::XInterface; + using ::com::sun::star::uno::UNO_QUERY; + using ::com::sun::star::uno::UNO_QUERY_THROW; + using ::com::sun::star::uno::Exception; + using ::com::sun::star::document::XUndoManagerSupplier; + using ::com::sun::star::document::XUndoManager; + using ::com::sun::star::document::XUndoManagerListener; + using ::com::sun::star::document::UndoManagerEvent; + using ::com::sun::star::lang::EventObject; + + //= UndoManagerContextListener + + typedef ::cppu::WeakImplHelper < XUndoManagerListener + > UndoManagerContextListener_Base; + + namespace { + + class UndoManagerContextListener : public UndoManagerContextListener_Base + { + public: + explicit UndoManagerContextListener( const Reference< XUndoManager >& i_undoManager ) + :m_xUndoManager( i_undoManager ) + ,m_nRelativeContextDepth( 0 ) + ,m_documentDisposed( false ) + { + osl_atomic_increment( &m_refCount ); + { + m_xUndoManager->addUndoManagerListener( this ); + } + osl_atomic_decrement( &m_refCount ); + } + + void finish() + { + OSL_ENSURE( m_nRelativeContextDepth >= 0, "UndoManagerContextListener: more contexts left than entered?" ); + + if ( m_documentDisposed ) + return; + + // work with a copy of m_nRelativeContextDepth, to be independent from possible bugs in the + // listener notifications (where it would be decremented with every leaveUndoContext) + sal_Int32 nDepth = m_nRelativeContextDepth; + while ( nDepth-- > 0 ) + { + m_xUndoManager->leaveUndoContext(); + } + m_xUndoManager->removeUndoManagerListener( this ); + } + + // XUndoManagerListener + virtual void SAL_CALL undoActionAdded( const UndoManagerEvent& i_event ) override; + virtual void SAL_CALL actionUndone( const UndoManagerEvent& i_event ) override; + virtual void SAL_CALL actionRedone( const UndoManagerEvent& i_event ) override; + virtual void SAL_CALL allActionsCleared( const EventObject& i_event ) override; + virtual void SAL_CALL redoActionsCleared( const EventObject& i_event ) override; + virtual void SAL_CALL resetAll( const EventObject& i_event ) override; + virtual void SAL_CALL enteredContext( const UndoManagerEvent& i_event ) override; + virtual void SAL_CALL enteredHiddenContext( const UndoManagerEvent& i_event ) override; + virtual void SAL_CALL leftContext( const UndoManagerEvent& i_event ) override; + virtual void SAL_CALL leftHiddenContext( const UndoManagerEvent& i_event ) override; + virtual void SAL_CALL cancelledContext( const UndoManagerEvent& i_event ) override; + + // XEventListener + virtual void SAL_CALL disposing( const EventObject& i_event ) override; + + private: + Reference< XUndoManager > const m_xUndoManager; + oslInterlockedCount m_nRelativeContextDepth; + bool m_documentDisposed; + }; + + } + + void SAL_CALL UndoManagerContextListener::undoActionAdded( const UndoManagerEvent& ) + { + // not interested in + } + + void SAL_CALL UndoManagerContextListener::actionUndone( const UndoManagerEvent& ) + { + // not interested in + } + + void SAL_CALL UndoManagerContextListener::actionRedone( const UndoManagerEvent& ) + { + // not interested in + } + + void SAL_CALL UndoManagerContextListener::allActionsCleared( const EventObject& ) + { + // not interested in + } + + void SAL_CALL UndoManagerContextListener::redoActionsCleared( const EventObject& ) + { + // not interested in + } + + void SAL_CALL UndoManagerContextListener::resetAll( const EventObject& ) + { + m_nRelativeContextDepth = 0; + } + + void SAL_CALL UndoManagerContextListener::enteredContext( const UndoManagerEvent& ) + { + osl_atomic_increment( &m_nRelativeContextDepth ); + } + + void SAL_CALL UndoManagerContextListener::enteredHiddenContext( const UndoManagerEvent& ) + { + osl_atomic_increment( &m_nRelativeContextDepth ); + } + + void SAL_CALL UndoManagerContextListener::leftContext( const UndoManagerEvent& ) + { + osl_atomic_decrement( &m_nRelativeContextDepth ); + } + + void SAL_CALL UndoManagerContextListener::leftHiddenContext( const UndoManagerEvent& ) + { + osl_atomic_decrement( &m_nRelativeContextDepth ); + } + + void SAL_CALL UndoManagerContextListener::cancelledContext( const UndoManagerEvent& ) + { + osl_atomic_decrement( &m_nRelativeContextDepth ); + } + + void SAL_CALL UndoManagerContextListener::disposing( const EventObject& ) + { + m_documentDisposed = true; + } + + //= DocumentUndoGuard_Data + + struct DocumentUndoGuard_Data + { + Reference< XUndoManager > xUndoManager; + ::rtl::Reference< UndoManagerContextListener > pContextListener; + }; + + namespace + { + + void lcl_init( DocumentUndoGuard_Data& i_data, const Reference< XInterface >& i_undoSupplierComponent ) + { + try + { + Reference< XUndoManagerSupplier > xUndoSupplier( i_undoSupplierComponent, UNO_QUERY ); + if ( xUndoSupplier.is() ) + i_data.xUndoManager.set( xUndoSupplier->getUndoManager(), css::uno::UNO_SET_THROW ); + + if ( i_data.xUndoManager.is() ) + i_data.pContextListener.set( new UndoManagerContextListener( i_data.xUndoManager ) ); + } + catch( const Exception& ) + { + DBG_UNHANDLED_EXCEPTION("fwk"); + } + } + + void lcl_restore( DocumentUndoGuard_Data& i_data ) + { + try + { + if ( i_data.pContextListener.is() ) + i_data.pContextListener->finish(); + i_data.pContextListener.clear(); + } + catch( const Exception& ) + { + DBG_UNHANDLED_EXCEPTION("fwk"); + } + } + } + + //= DocumentUndoGuard + + DocumentUndoGuard::DocumentUndoGuard( const Reference< XInterface >& i_undoSupplierComponent ) + :m_xData( new DocumentUndoGuard_Data ) + { + lcl_init( *m_xData, i_undoSupplierComponent ); + } + + DocumentUndoGuard::~DocumentUndoGuard() + { + lcl_restore( *m_xData ); + } + +} // namespace framework + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |