toolkit/test/accessibility/AccessibleTreeNode.java

   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 java.util.ArrayList;
  20
  21 import com.sun.star.lang.IndexOutOfBoundsException;
  22
  23 /**
  24     Base class for all tree nodes.
  25  */
  26 abstract class AccessibleTreeNode
  27 {
  28     /// The parent node.  It is null for the root node.
  29     private AccessibleTreeNode maParent;
  30
  31     /// The object to be displayed.
  32     private final Object maDisplayObject;
  33
  34     public AccessibleTreeNode (Object aDisplayObject, AccessibleTreeNode aParent)
  35     {
  36         maDisplayObject = aDisplayObject;
  37         maParent = aParent;
  38     }
  39
  40     public void update ()
  41     {
  42         // Empty
  43     }
  44
  45     public AccessibleTreeNode getParent ()
  46     {
  47         return maParent;
  48     }
  49
  50     public int getChildCount ()
  51     {
  52         return 0;
  53     }
  54
  55     public AccessibleTreeNode getChild (int nIndex)
  56         throws IndexOutOfBoundsException
  57     {
  58         throw new IndexOutOfBoundsException();
  59     }
  60
  61     public AccessibleTreeNode getChildNoCreate (int nIndex)
  62         throws IndexOutOfBoundsException
  63     {
  64         throw new IndexOutOfBoundsException();
  65     }
  66
  67     public boolean removeChild (int nIndex)
  68         throws IndexOutOfBoundsException
  69     {
  70         throw new IndexOutOfBoundsException();
  71     }
  72
  73     public abstract int indexOf (AccessibleTreeNode aNode);
  74
  75     /** Create a path to this node by first asking the parent for its path
  76         and then appending this object.
  77     */
  78     public void createPath (java.util.List<AccessibleTreeNode> aPath)
  79     {
  80         if (maParent != null)
  81             maParent.createPath (aPath);
  82         aPath.add (this);
  83     }
  84
  85     public Object[] createPath ()
  86     {
  87         ArrayList<AccessibleTreeNode> aPath = new ArrayList<AccessibleTreeNode> (1);
  88         createPath (aPath);
  89         return aPath.toArray();
  90     }
  91
  92     public boolean isLeaf()
  93     {
  94         return true;
  95     }
  96
  97     @Override
  98     public String toString()
  99     {
 100         return maDisplayObject.toString();
 101     }
 102
 103     /** get names of supported actions */
 104     public String[] getActions ()
 105     {
 106         return new String[] {};
 107     }
 108
 109     /** perform action */
 110     public void performAction (int nIndex)
 111     {
 112     }
 113 }