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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 <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: */
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