127 lines
4.1 KiB
Java
127 lines
4.1 KiB
Java
/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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import com.sun.star.accessibility.XAccessible;
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import com.sun.star.accessibility.XAccessibleContext;
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import com.sun.star.lang.IndexOutOfBoundsException;
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/**
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* Map the tree of accessibility objects into their
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* AccessibilityTreeModel counterparts.
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*/
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class AccessibleTreeHandler
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extends NodeHandler
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{
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protected XAccessibleContext mxContext;
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public NodeHandler createHandler (XAccessibleContext xContext)
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{
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if (xContext != null)
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return new AccessibleTreeHandler (xContext);
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else
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return null;
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}
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public AccessibleTreeHandler ()
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{
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super();
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mxContext = null;
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}
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public AccessibleTreeHandler (XAccessibleContext xContext)
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{
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super();
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mxContext = xContext;
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if (mxContext != null)
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// Add one to the number of children to include the string node
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// that tells you how many children there are.
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synchronized (maChildList)
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{
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maChildList.setSize (1 + mxContext.getAccessibleChildCount());
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}
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}
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public AccessibleTreeNode createChild (AccessibleTreeNode aParent, int nIndex)
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{
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AccessibleTreeNode aChild = null;
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if (mxContext != null)
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{
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if (nIndex == 0)
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aChild = new StringNode ("Child count: " + mxContext.getAccessibleChildCount(),
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aParent);
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else
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{
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// Lower index to skip the string node.
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nIndex -= 1;
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try
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{
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XAccessible xChild = mxContext.getAccessibleChild (nIndex);
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aChild = NodeFactory.Instance().createDefaultNode (
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xChild, aParent);
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}
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catch( IndexOutOfBoundsException e )
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{
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aChild = new StringNode ("ERROR: no child with index " + nIndex, aParent);
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}
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}
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}
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else
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aChild = new StringNode ("XAccessibleContext interface not supported", aParent);
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return aChild;
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}
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/** Try to add the specified accessible child into the lists of
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children. The insertion position is determined from the
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getIndexInParent method of the child.
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*/
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public AccessibleTreeNode addAccessibleChild (AccessibleTreeNode aParent, XAccessible xChild)
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{
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AccessibleTreeNode aChild = null;
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if (xChild != null)
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{
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XAccessibleContext xContext = xChild.getAccessibleContext();
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if (xContext != null)
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{
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int nIndex = xContext.getAccessibleIndexInParent() + 1;
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synchronized (maChildList)
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{
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if ((nIndex >= 0) || (nIndex <= maChildList.size()))
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{
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aChild = NodeFactory.Instance().createDefaultNode (xChild, aParent);
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maChildList.insertElementAt (aChild, nIndex);
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}
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}
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}
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}
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return aChild;
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}
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/** Update only the child count node. Trust on other ways to update the
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accessible children.
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*/
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public void update (AccessibleTreeNode aNode)
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{
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synchronized (maChildList)
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{
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maChildList.setElementAt (null, 0);
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}
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}
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}
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