vcl/osx/documentfocuslistener.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include "documentfocuslistener.hxx"
  21
  22 #include <com/sun/star/accessibility/XAccessibleEventBroadcaster.hpp>
  23 #include <com/sun/star/accessibility/AccessibleEventId.hpp>
  24 #include <com/sun/star/accessibility/AccessibleStateType.hpp>
  25 #include <com/sun/star/lang/IndexOutOfBoundsException.hpp>
  26
  27 using namespace ::com::sun::star::accessibility;
  28 using namespace ::com::sun::star::lang;
  29 using namespace ::com::sun::star::uno;
  30
  31 DocumentFocusListener::DocumentFocusListener(AquaA11yFocusTracker& rTracker) :
  32     m_aFocusTracker(rTracker)
  33 {
  34 }
  35
  36 void SAL_CALL
  37 DocumentFocusListener::disposing( const EventObject& aEvent )
  38 {
  39     // Unref the object here, but do not remove as listener since the object
  40     // might no longer be in a state that safely allows this.
  41     if( aEvent.Source.is() )
  42         m_aRefList.erase(aEvent.Source);
  43 }
  44
  45 void SAL_CALL
  46 DocumentFocusListener::notifyEvent( const AccessibleEventObject& aEvent )
  47 {
  48     try {
  49         switch( aEvent.EventId )
  50         {
  51             case AccessibleEventId::STATE_CHANGED:
  52             {
  53                 sal_Int16 nState = AccessibleStateType::INVALID;
  54                 aEvent.NewValue >>= nState;
  55
  56                 if( AccessibleStateType::FOCUSED == nState )
  57                     m_aFocusTracker.setFocusedObject( getAccessible(aEvent) );
  58             }
  59             break;
  60
  61             case AccessibleEventId::CHILD:
  62             {
  63                 Reference< XAccessible > xChild;
  64                 if( (aEvent.OldValue >>= xChild) && xChild.is() )
  65                     detachRecursive(xChild);
  66
  67                 if( (aEvent.NewValue >>= xChild) && xChild.is() )
  68                     attachRecursive(xChild);
  69             }
  70             break;
  71
  72             case AccessibleEventId::INVALIDATE_ALL_CHILDREN:
  73             {
  74                 Reference< XAccessible > xAccessible( getAccessible(aEvent) );
  75                 detachRecursive(xAccessible);
  76                 attachRecursive(xAccessible);
  77                 SAL_INFO("vcl", "Invalidate all children called" );
  78             }
  79             break;
  80
  81             default:
  82                 break;
  83         }
  84     }
  85     catch (const IndexOutOfBoundsException&)
  86     {
  87         SAL_WARN("vcl", "Focused object has invalid index in parent");
  88     }
  89 }
  90
  91 Reference< XAccessible > DocumentFocusListener::getAccessible(const EventObject& aEvent )
  92 {
  93     Reference< XAccessible > xAccessible(aEvent.Source, UNO_QUERY);
  94
  95     if( xAccessible.is() )
  96         return xAccessible;
  97
  98     Reference< XAccessibleContext > xContext(aEvent.Source, UNO_QUERY);
  99
 100     if( xContext.is() )
 101     {
 102         Reference< XAccessible > xParent( xContext->getAccessibleParent() );
 103         if( xParent.is() )
 104         {
 105             Reference< XAccessibleContext > xParentContext( xParent->getAccessibleContext() );
 106             if( xParentContext.is() )
 107             {
 108                 return xParentContext->getAccessibleChild( xContext->getAccessibleIndexInParent() );
 109             }
 110         }
 111     }
 112
 113     return Reference< XAccessible >();
 114 }
 115
 116 void DocumentFocusListener::attachRecursive(const Reference< XAccessible >& xAccessible)
 117 {
 118     Reference< XAccessibleContext > xContext = xAccessible->getAccessibleContext();
 119
 120     if( xContext.is() )
 121         attachRecursive(xAccessible, xContext);
 122 }
 123
 124 void DocumentFocusListener::attachRecursive(
 125     const Reference< XAccessible >& xAccessible,
 126     const Reference< XAccessibleContext >& xContext
 127 )
 128 {
 129     if( xContext.is() )
 130     {
 131         Reference< XAccessibleStateSet > xStateSet = xContext->getAccessibleStateSet();
 132
 133         if( xStateSet.is() )
 134             attachRecursive(xAccessible, xContext, xStateSet);
 135     }
 136 }
 137
 138 void DocumentFocusListener::attachRecursive(
 139     const Reference< XAccessible >& xAccessible,
 140     const Reference< XAccessibleContext >& xContext,
 141     const Reference< XAccessibleStateSet >& xStateSet
 142 )
 143 {
 144     if( xStateSet->contains(AccessibleStateType::FOCUSED ) )
 145         m_aFocusTracker.setFocusedObject( xAccessible );
 146
 147     Reference< XAccessibleEventBroadcaster > xBroadcaster =
 148         Reference< XAccessibleEventBroadcaster >(xContext, UNO_QUERY);
 149
 150     // If not already done, add the broadcaster to the list and attach as listener.
 151     if( xBroadcaster.is() && m_aRefList.insert(xBroadcaster).second )
 152     {
 153         xBroadcaster->addAccessibleEventListener(static_cast< XAccessibleEventListener *>(this));
 154
 155         if( ! xStateSet->contains(AccessibleStateType::MANAGES_DESCENDANTS ) )
 156         {
 157             sal_Int32 n, nmax = xContext->getAccessibleChildCount();
 158             for( n = 0; n < nmax; n++ )
 159             {
 160                 Reference< XAccessible > xChild( xContext->getAccessibleChild( n ) );
 161
 162                 if( xChild.is() )
 163                     attachRecursive(xChild);
 164             }
 165         }
 166     }
 167 }
 168
 169 void DocumentFocusListener::detachRecursive(const Reference< XAccessible >& xAccessible)
 170 {
 171     Reference< XAccessibleContext > xContext = xAccessible->getAccessibleContext();
 172
 173     if( xContext.is() )
 174         detachRecursive(xAccessible, xContext);
 175 }
 176
 177 void DocumentFocusListener::detachRecursive(
 178     const Reference< XAccessible >& xAccessible,
 179     const Reference< XAccessibleContext >& xContext
 180 )
 181 {
 182     Reference< XAccessibleStateSet > xStateSet = xContext->getAccessibleStateSet();
 183
 184     if( xStateSet.is() )
 185         detachRecursive(xAccessible, xContext, xStateSet);
 186 }
 187
 188 void DocumentFocusListener::detachRecursive(
 189     const Reference< XAccessible >&,
 190     const Reference< XAccessibleContext >& xContext,
 191     const Reference< XAccessibleStateSet >& xStateSet
 192 )
 193 {
 194     Reference< XAccessibleEventBroadcaster > xBroadcaster =
 195         Reference< XAccessibleEventBroadcaster >(xContext, UNO_QUERY);
 196
 197     if( xBroadcaster.is() && 0 < m_aRefList.erase(xBroadcaster) )
 198     {
 199         xBroadcaster->removeAccessibleEventListener(static_cast< XAccessibleEventListener *>(this));
 200
 201         if( ! xStateSet->contains(AccessibleStateType::MANAGES_DESCENDANTS ) )
 202         {
 203             sal_Int32 n, nmax = xContext->getAccessibleChildCount();
 204             for( n = 0; n < nmax; n++ )
 205             {
 206                 Reference< XAccessible > xChild( xContext->getAccessibleChild( n ) );
 207
 208                 if( xChild.is() )
 209                     detachRecursive(xChild);
 210             }
 211         }
 212     }
 213 }
 214
 215 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */