AOO410/main/vcl/aqua/source/a11y/aqua11ylistener.cxx

/**************************************************************
 * 
 * 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.
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 *************************************************************/


 
#include "aqua/salinst.h"
#include "aqua/aqua11ylistener.hxx"
#include "aqua/aqua11yfactory.h"
#include "aqua/aqua11yfocustracker.hxx"
#include "aqua/aqua11ywrapper.h"

#include "aqua11ytextwrapper.h"

#include <com/sun/star/accessibility/AccessibleEventId.hpp>
#include <com/sun/star/accessibility/AccessibleRole.hpp>
#include <com/sun/star/accessibility/AccessibleTableModelChange.hpp>
#include <com/sun/star/accessibility/AccessibleTableModelChangeType.hpp>

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

NSString * getTableNotification( const AccessibleEventObject& aEvent )
{
    AccessibleTableModelChange aChange;
    NSString * notification = nil;
    
    if( (aEvent.NewValue >>= aChange) &&
        ( AccessibleTableModelChangeType::INSERT == aChange.Type || AccessibleTableModelChangeType::DELETE == aChange.Type ) &&
        aChange.FirstRow != aChange.LastRow )
    {
        notification = NSAccessibilityRowCountChangedNotification;
    }
    
    return notification;
}        

//------------------------------------------------------------------------------

AquaA11yEventListener::AquaA11yEventListener(id wrapperObject, sal_Int16 role) : m_wrapperObject(wrapperObject), m_role(role)
{
    [ m_wrapperObject retain ];
}

//------------------------------------------------------------------------------

AquaA11yEventListener::~AquaA11yEventListener() 
{
    [ m_wrapperObject release ];
}

//------------------------------------------------------------------------------

void SAL_CALL 
AquaA11yEventListener::disposing( const EventObject& ) throw( RuntimeException )
{
    [ AquaA11yFactory removeFromWrapperRepositoryFor: [ (AquaA11yWrapper *) m_wrapperObject accessibleContext ] ];
}

//------------------------------------------------------------------------------

void SAL_CALL 
AquaA11yEventListener::notifyEvent( const AccessibleEventObject& aEvent ) throw( RuntimeException )
{
    NSString * notification = nil;
    id element = m_wrapperObject;
    Rectangle bounds;
    
    // TODO: NSAccessibilityValueChanged, NSAccessibilitySelectedRowsChangedNotification
    switch( aEvent.EventId )
    {
        case AccessibleEventId::ACTIVE_DESCENDANT_CHANGED:
            if( m_role != AccessibleRole::LIST ) {
                Reference< XAccessible > xAccessible;
                if( aEvent.NewValue >>= xAccessible )
                    AquaA11yFocusTracker::get().setFocusedObject( xAccessible );
            }
            break;
            
        case AccessibleEventId::NAME_CHANGED:
            notification = NSAccessibilityTitleChangedNotification;
            break;
            
        case AccessibleEventId::CHILD:
            // only needed for tooltips (says Apple)
            if ( m_role == AccessibleRole::TOOL_TIP ) {
                if(aEvent.NewValue.hasValue()) {
                    notification = NSAccessibilityCreatedNotification;
                } else if(aEvent.OldValue.hasValue()) {
                    notification = NSAccessibilityUIElementDestroyedNotification;
                }
            }
            break;
            
        case AccessibleEventId::INVALIDATE_ALL_CHILDREN:
            // TODO: depricate or remember all children 
            break;
             
        case AccessibleEventId::BOUNDRECT_CHANGED:
            bounds = [ element accessibleComponent ] -> getBounds();
            if ( m_oldBounds.X != 0 && ( bounds.X != m_oldBounds.X || bounds.Y != m_oldBounds.Y ) ) {
                NSAccessibilityPostNotification(element, NSAccessibilityMovedNotification); // post directly since both cases can happen simultaneously
            }
            if ( m_oldBounds.X != 0 && ( bounds.Width != m_oldBounds.Width || bounds.Height != m_oldBounds.Height ) ) {
                NSAccessibilityPostNotification(element, NSAccessibilityResizedNotification); // post directly since both cases can happen simultaneously
            }
            m_oldBounds = bounds;
            break;
                
        case AccessibleEventId::SELECTION_CHANGED:
            notification = NSAccessibilitySelectedChildrenChangedNotification;
            break;
            
        case AccessibleEventId::TEXT_SELECTION_CHANGED:
            notification = NSAccessibilitySelectedTextChangedNotification;
            break;
 
        case AccessibleEventId::TABLE_MODEL_CHANGED:
            notification = getTableNotification(aEvent);
            break;
        
        case AccessibleEventId::CARET_CHANGED:
            notification = NSAccessibilitySelectedTextChangedNotification;
            break;
        
        case AccessibleEventId::TEXT_CHANGED:
            notification = NSAccessibilityValueChangedNotification;
            break;

        default:
            break;
    }
    
    if( nil != notification )
        NSAccessibilityPostNotification(element, notification);
}