1 /*
2  * This file is part of the LibreOffice project.
3  *
4  * This Source Code Form is subject to the terms of the Mozilla Public
5  * License, v. 2.0. If a copy of the MPL was not distributed with this
6  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
7  *
8  * This file incorporates work covered by the following license notice:
9  *
10  *   Licensed to the Apache Software Foundation (ASF) under one or more
11  *   contributor license agreements. See the NOTICE file distributed
12  *   with this work for additional information regarding copyright
13  *   ownership. The ASF licenses this file to you under the Apache
14  *   License, Version 2.0 (the "License"); you may not use this file
15  *   except in compliance with the License. You may obtain a copy of
16  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
17  */
18 
19 import com.sun.star.uno.UnoRuntime;
20 import com.sun.star.accessibility.XAccessible;
21 import com.sun.star.accessibility.XAccessibleContext;
22 import com.sun.star.accessibility.AccessibleRelation;
23 import com.sun.star.accessibility.XAccessibleRelationSet;
24 import com.sun.star.lang.IndexOutOfBoundsException;
25 
26 import tools.NameProvider;
27 
28 class AccessibleRelationHandler
29     extends NodeHandler
30 {
31     @Override
createHandler( XAccessibleContext xContext )32     public NodeHandler createHandler( XAccessibleContext xContext )
33     {
34         AccessibleRelationHandler aHandler = null;
35         if (xContext != null)
36         {
37             XAccessibleRelationSet xRelation = xContext.getAccessibleRelationSet();
38             if (xRelation != null)
39                 aHandler = new AccessibleRelationHandler(xContext);
40         }
41         return aHandler;
42     }
43 
AccessibleRelationHandler()44     public AccessibleRelationHandler()
45     {
46     }
47 
AccessibleRelationHandler( XAccessibleContext xContext )48     private AccessibleRelationHandler( XAccessibleContext xContext )
49     {
50         XAccessibleRelationSet xRelation = xContext.getAccessibleRelationSet();
51         if (xRelation != null)
52             maChildList.setSize( 1 );
53     }
54 
55     @Override
createChild( AccessibleTreeNode aParent, int nIndex )56     public AccessibleTreeNode createChild( AccessibleTreeNode aParent,
57                                            int nIndex )
58     {
59         XAccessibleRelationSet xRelation = null;
60         AccessibleTreeNode aChild = null;
61 
62         if( aParent instanceof AccTreeNode )
63         {
64             xRelation =
65                 ((AccTreeNode)aParent).getContext().getAccessibleRelationSet();
66         }
67         if( xRelation == null )
68             return aChild;
69 
70 
71         VectorNode aVNode = new VectorNode( "RelationSet", aParent);
72         int nCount = xRelation.getRelationCount();
73         try
74         {
75             for( int i = 0; i < nCount; i++ )
76             {
77                 AccessibleRelation aRelation = xRelation.getRelation( i );
78 
79                 StringBuffer aBuffer = new StringBuffer();
80                 aBuffer.append (NameProvider.getRelationName (aRelation.RelationType));
81                 aBuffer.append( ": " );
82 
83                 for( int j = 0; j < aRelation.TargetSet.length; j++ )
84                 {
85                     Object aTarget = aRelation.TargetSet[j];
86                     XAccessible xAccTarget =
87                         UnoRuntime.queryInterface(
88                          XAccessible.class, aTarget );
89                     if( xAccTarget == null )
90                     {
91                         aBuffer.append( aTarget.toString() );
92                     }
93                     else
94                     {
95                         aBuffer.append( xAccTarget.getAccessibleContext().
96                                          getAccessibleName() );
97                     }
98                     aBuffer.append( ", " );
99                 }
100                 aBuffer.delete( aBuffer.length() - 2, aBuffer.length() );
101 
102                 aVNode.addChild( new StringNode( aBuffer.toString(),
103                                                  aParent ) );
104             }
105 
106             aChild = aVNode;
107         }
108         catch( IndexOutOfBoundsException e )
109         {
110             aChild = new StringNode( "IndexOutOfBounds", aParent );
111         }
112 
113         return aChild;
114     }
115 }
116