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 #include <sal/log.hxx>
27
28 using namespace ::com::sun::star::accessibility;
29 using namespace ::com::sun::star::lang;
30 using namespace ::com::sun::star::uno;
31
DocumentFocusListener(AquaA11yFocusTracker & rTracker)32 DocumentFocusListener::DocumentFocusListener(AquaA11yFocusTracker& rTracker) :
33 m_aFocusTracker(rTracker)
34 {
35 }
36
37 void SAL_CALL
disposing(const EventObject & aEvent)38 DocumentFocusListener::disposing( const EventObject& aEvent )
39 {
40 // Unref the object here, but do not remove as listener since the object
41 // might no longer be in a state that safely allows this.
42 if( aEvent.Source.is() )
43 m_aRefList.erase(aEvent.Source);
44 }
45
46 void SAL_CALL
notifyEvent(const AccessibleEventObject & aEvent)47 DocumentFocusListener::notifyEvent( const AccessibleEventObject& aEvent )
48 {
49 try {
50 switch( aEvent.EventId )
51 {
52 case AccessibleEventId::STATE_CHANGED:
53 {
54 sal_Int16 nState = AccessibleStateType::INVALID;
55 aEvent.NewValue >>= nState;
56
57 if( AccessibleStateType::FOCUSED == nState )
58 m_aFocusTracker.setFocusedObject( getAccessible(aEvent) );
59 }
60 break;
61
62 case AccessibleEventId::CHILD:
63 {
64 Reference< XAccessible > xChild;
65 if( (aEvent.OldValue >>= xChild) && xChild.is() )
66 detachRecursive(xChild);
67
68 if( (aEvent.NewValue >>= xChild) && xChild.is() )
69 attachRecursive(xChild);
70 }
71 break;
72
73 case AccessibleEventId::INVALIDATE_ALL_CHILDREN:
74 {
75 Reference< XAccessible > xAccessible( getAccessible(aEvent) );
76 detachRecursive(xAccessible);
77 attachRecursive(xAccessible);
78 SAL_INFO("vcl", "Invalidate all children called" );
79 }
80 break;
81
82 default:
83 break;
84 }
85 }
86 catch (const IndexOutOfBoundsException&)
87 {
88 SAL_WARN("vcl", "Focused object has invalid index in parent");
89 }
90 }
91
getAccessible(const EventObject & aEvent)92 Reference< XAccessible > DocumentFocusListener::getAccessible(const EventObject& aEvent )
93 {
94 Reference< XAccessible > xAccessible(aEvent.Source, UNO_QUERY);
95
96 if( xAccessible.is() )
97 return xAccessible;
98
99 Reference< XAccessibleContext > xContext(aEvent.Source, UNO_QUERY);
100
101 if( xContext.is() )
102 {
103 Reference< XAccessible > xParent( xContext->getAccessibleParent() );
104 if( xParent.is() )
105 {
106 Reference< XAccessibleContext > xParentContext( xParent->getAccessibleContext() );
107 if( xParentContext.is() )
108 {
109 return xParentContext->getAccessibleChild( xContext->getAccessibleIndexInParent() );
110 }
111 }
112 }
113
114 return Reference< XAccessible >();
115 }
116
attachRecursive(const Reference<XAccessible> & xAccessible)117 void DocumentFocusListener::attachRecursive(const Reference< XAccessible >& xAccessible)
118 {
119 Reference< XAccessibleContext > xContext = xAccessible->getAccessibleContext();
120
121 if( xContext.is() )
122 attachRecursive(xAccessible, xContext);
123 }
124
attachRecursive(const Reference<XAccessible> & xAccessible,const Reference<XAccessibleContext> & xContext)125 void DocumentFocusListener::attachRecursive(
126 const Reference< XAccessible >& xAccessible,
127 const Reference< XAccessibleContext >& xContext
128 )
129 {
130 if( xContext.is() )
131 {
132 Reference< XAccessibleStateSet > xStateSet = xContext->getAccessibleStateSet();
133
134 if( xStateSet.is() )
135 attachRecursive(xAccessible, xContext, xStateSet);
136 }
137 }
138
attachRecursive(const Reference<XAccessible> & xAccessible,const Reference<XAccessibleContext> & xContext,const Reference<XAccessibleStateSet> & xStateSet)139 void DocumentFocusListener::attachRecursive(
140 const Reference< XAccessible >& xAccessible,
141 const Reference< XAccessibleContext >& xContext,
142 const Reference< XAccessibleStateSet >& xStateSet
143 )
144 {
145 if( xStateSet->contains(AccessibleStateType::FOCUSED ) )
146 m_aFocusTracker.setFocusedObject( xAccessible );
147
148 Reference< XAccessibleEventBroadcaster > xBroadcaster(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
detachRecursive(const Reference<XAccessible> & xAccessible)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
detachRecursive(const Reference<XAccessible> & xAccessible,const Reference<XAccessibleContext> & xContext)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
detachRecursive(const Reference<XAccessible> &,const Reference<XAccessibleContext> & xContext,const Reference<XAccessibleStateSet> & xStateSet)188 void DocumentFocusListener::detachRecursive(
189 const Reference< XAccessible >&,
190 const Reference< XAccessibleContext >& xContext,
191 const Reference< XAccessibleStateSet >& xStateSet
192 )
193 {
194 Reference< XAccessibleEventBroadcaster > xBroadcaster(xContext, UNO_QUERY);
195
196 if( xBroadcaster.is() && 0 < m_aRefList.erase(xBroadcaster) )
197 {
198 xBroadcaster->removeAccessibleEventListener(static_cast< XAccessibleEventListener *>(this));
199
200 if( ! xStateSet->contains(AccessibleStateType::MANAGES_DESCENDANTS ) )
201 {
202 sal_Int32 n, nmax = xContext->getAccessibleChildCount();
203 for( n = 0; n < nmax; n++ )
204 {
205 Reference< XAccessible > xChild( xContext->getAccessibleChild( n ) );
206
207 if( xChild.is() )
208 detachRecursive(xChild);
209 }
210 }
211 }
212 }
213
214 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
215