/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/

#include <com/sun/star/accessibility/XAccessible.hpp>
#include <com/sun/star/accessibility/AccessibleStateType.hpp>
#include <com/sun/star/accessibility/AccessibleEventId.hpp>
#include <com/sun/star/accessibility/AccessibleRole.hpp>
#include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>

#include "AccMenuEventListener.hxx"
#include "AccObjectManagerAgent.hxx"
#include "unomsaaevent.hxx"

using namespace com::sun::star::uno;
using namespace com::sun::star::accessibility;

AccMenuEventListener::AccMenuEventListener(com::sun::star::accessibility::XAccessible* pAcc, AccObjectManagerAgent* Agent)
        :AccComponentEventListener(pAcc, Agent)
{}
AccMenuEventListener::~AccMenuEventListener()
{
}

/**
 *	Uno's event notifier when event is captured
 *	@param AccessibleEventObject	the event object which contains information about event
 */
void  AccMenuEventListener::notifyEvent( const ::com::sun::star::accessibility::AccessibleEventObject& aEvent )
throw (::com::sun::star::uno::RuntimeException)
{
    switch (aEvent.EventId)
    {
    case AccessibleEventId::CHILD:
        handleChildChangedEvent(aEvent.OldValue, aEvent.NewValue);
        break;
    case AccessibleEventId::SELECTION_CHANGED:
        //don't need to process anything,just same as word behavior
        //handleSelectionChangedEvent();
        break;
    default:
        AccComponentEventListener::notifyEvent(aEvent);
        break;
    }
}

/**
 *	handle the CHILD event
 *	@param	oldValue	the child to be deleted
 *	@param	newValue	the child to be added
 */
void AccMenuEventListener::handleChildChangedEvent(Any oldValue, Any newValue)
{

    Reference< XAccessible > xChild;
    if( newValue >>= xChild)
    {
        //create a new child
        if(xChild.is())
        {
            XAccessible* pAcc = xChild.get();
            //add this child
            pAgent->InsertAccObj( pAcc,pAccessible);
            //add all oldValue's existing children
            pAgent->InsertChildrenAccObj(pAcc);
            pAgent->NotifyAccEvent(UM_EVENT_CHILD_ADDED, pAcc);
        }
        else
        {}
    }
    else if (oldValue >>= xChild)
    {
        //delete an existing child
        if(xChild.is())
        {
            XAccessible* pAcc = xChild.get();
            pAgent->NotifyAccEvent(UM_EVENT_CHILD_REMOVED, pAcc);
            //delete all oldValue's existing children
            pAgent->DeleteChildrenAccObj( pAcc );
            //delete this child
            pAgent->DeleteAccObj( pAcc );
        }
        else
        {}
    }

}

/**
 *	handle the SELECTION_CHANGED event
 */
void AccMenuEventListener::handleSelectionChangedEvent()
{
    pAgent->NotifyAccEvent(UM_EVENT_SELECTION_CHANGED, pAccessible);
}

/**
 *	handle the Menu_popup event
 */
void AccMenuEventListener::fireStatePropertyChange(short state, bool set)
{
    if( set )
    {
        // new value
        switch(state)
        {
            //for sub menu is popup, there is a menu selected event.
        case AccessibleStateType::SELECTED:
            pAgent->IncreaseState( pAccessible, state);

            pAgent->UpdateChildState(pAccessible);
            break;
        default:
            AccComponentEventListener::fireStatePropertyChange(state, set
                                                                  );
            break;
        }
    }
    else
    {
        switch(state)
        {
            //for sub menu is popup, there is a menu selected event.
        case AccessibleStateType::SELECTED:
            pAgent->DecreaseState( pAccessible, state );

            break;
        default:
            AccComponentEventListener::fireStatePropertyChange(state, set
                                                                  );
            break;
        }
    }
}