/* -*- 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 "UndoCommandDispatch.hxx"
#include <ResId.hxx>

#include <com/sun/star/util/XModifyBroadcaster.hpp>
#include <com/sun/star/document/UndoFailedException.hpp>
#include <com/sun/star/document/XUndoManagerSupplier.hpp>

#include <vcl/svapp.hxx>
#include <tools/diagnose_ex.h>

#include <svtools/strings.hrc>
#include <svtools/svtresid.hxx>

using namespace ::com::sun::star;

using ::com::sun::star::uno::Reference;
using ::com::sun::star::uno::Sequence;

namespace chart
{

UndoCommandDispatch::UndoCommandDispatch(
    const Reference< uno::XComponentContext > & xContext,
    const Reference< frame::XModel > & xModel ) :
        CommandDispatch( xContext ),
        m_xModel( xModel )
{
    uno::Reference< document::XUndoManagerSupplier > xSuppUndo( m_xModel, uno::UNO_QUERY_THROW );
    m_xUndoManager.set( xSuppUndo->getUndoManager(), uno::UNO_QUERY_THROW );
}

UndoCommandDispatch::~UndoCommandDispatch()
{}

void UndoCommandDispatch::initialize()
{
    Reference< util::XModifyBroadcaster > xBroadcaster( m_xUndoManager, uno::UNO_QUERY );
    ENSURE_OR_RETURN_VOID( xBroadcaster.is(), "UndoCommandDispatch::initialize: missing modification broadcaster interface!" );
    xBroadcaster->addModifyListener( this );
}

void UndoCommandDispatch::fireStatusEvent(
    const OUString & rURL,
    const Reference< frame::XStatusListener > & xSingleListener /* = 0 */ )
{
    if( m_xUndoManager.is() )
    {
        const bool bFireAll = rURL.isEmpty();
        uno::Any aUndoState, aRedoState;
        if( m_xUndoManager->isUndoPossible())
            aUndoState <<= ( SvtResId( STR_UNDO ) + m_xUndoManager->getCurrentUndoActionTitle());
        if( m_xUndoManager->isRedoPossible())
            aRedoState <<= ( SvtResId( STR_REDO ) + m_xUndoManager->getCurrentRedoActionTitle());

        if( bFireAll || rURL == ".uno:Undo" )
            fireStatusEventForURL( ".uno:Undo", aUndoState, m_xUndoManager->isUndoPossible(), xSingleListener );
        if( bFireAll || rURL == ".uno:Redo" )
            fireStatusEventForURL( ".uno:Redo", aRedoState, m_xUndoManager->isRedoPossible(), xSingleListener );
    }
}

// ____ XDispatch ____
void SAL_CALL UndoCommandDispatch::dispatch(
    const util::URL& URL,
    const Sequence< beans::PropertyValue >& /* Arguments */ )
{
    if( m_xUndoManager.is() )
    {
        // why is it necessary to lock the solar mutex here?
        SolarMutexGuard aSolarGuard;
        try
        {
            if ( URL.Path == "Undo" )
                m_xUndoManager->undo();
            else
                m_xUndoManager->redo();
        }
        catch( const document::UndoFailedException& )
        {
            // silently ignore
        }
        catch( const uno::Exception& )
        {
            DBG_UNHANDLED_EXCEPTION();
        }
        // \--
    }
}

// ____ WeakComponentImplHelperBase ____
/// is called when this is disposed
void SAL_CALL UndoCommandDispatch::disposing()
{
    Reference< util::XModifyBroadcaster > xBroadcaster( m_xUndoManager, uno::UNO_QUERY );
    OSL_ENSURE( xBroadcaster.is(), "UndoCommandDispatch::initialize: missing modification broadcaster interface!" );
    if( xBroadcaster.is() )
    {
        xBroadcaster->removeModifyListener( this );
    }

    m_xUndoManager.clear();
    m_xModel.clear();
}

// ____ XEventListener (base of XModifyListener) ____
void SAL_CALL UndoCommandDispatch::disposing( const lang::EventObject& /* Source */ )
{
    m_xUndoManager.clear();
    m_xModel.clear();
}

} //  namespace chart

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