import com.sun.star.accessibility.XAccessible; import com.sun.star.accessibility.XAccessibleContext; import com.sun.star.uno.UnoRuntime; import com.sun.star.lang.IndexOutOfBoundsException; /** * Map the tree of accessibility objects into their * AccessibilityTreeModel counterparts. */ class AccessibleTreeHandler extends NodeHandler { protected XAccessibleContext mxContext; public NodeHandler createHandler (XAccessibleContext xContext) { if (xContext != null) return new AccessibleTreeHandler (xContext); else return null; } public AccessibleTreeHandler () { super(); mxContext = null; } public AccessibleTreeHandler (XAccessibleContext xContext) { super(); mxContext = xContext; if (mxContext != null) // Add one to the number of children to include the string node // that tells you how many children there are. synchronized (maChildList) { maChildList.setSize (1 + mxContext.getAccessibleChildCount()); } } public AccessibleTreeNode createChild (AccessibleTreeNode aParent, int nIndex) { AccessibleTreeNode aChild = null; if (mxContext != null) { if (nIndex == 0) aChild = new StringNode ("Child count: " + mxContext.getAccessibleChildCount(), aParent); else { // Lower index to skip the string node. nIndex -= 1; try { XAccessible xChild = mxContext.getAccessibleChild (nIndex); aChild = NodeFactory.Instance().createDefaultNode ( xChild, aParent); } catch( IndexOutOfBoundsException e ) { aChild = new StringNode ("ERROR: no child with index " + nIndex, aParent); } } } else aChild = new StringNode ("XAccessibleContext interface not supported", aParent); return aChild; } /** Try to add the specified accessible child into the lists of children. The insertion position is determined from the getIndexInParent method of the child. */ public AccessibleTreeNode addAccessibleChild (AccessibleTreeNode aParent, XAccessible xChild) { AccessibleTreeNode aChild = null; if (xChild != null) { XAccessibleContext xContext = xChild.getAccessibleContext(); if (xContext != null) { int nIndex = xContext.getAccessibleIndexInParent() + 1; synchronized (maChildList) { if ((nIndex >= 0) || (nIndex <= maChildList.size())) { aChild = NodeFactory.Instance().createDefaultNode (xChild, aParent); maChildList.insertElementAt (aChild, nIndex); } } } } return aChild; } /** Update only the child count node. Trust on other ways to update the accessible children. */ public void update (AccessibleTreeNode aNode) { synchronized (maChildList) { maChildList.setElementAt (null, 0); } } }