ASTBrowserTopComponent.java 文件源码

public void caretUpdate (CaretEvent e) {
    if (rootNode == null) return;
    ASTPath path = rootNode.findPath (e.getDot ());
    if (path == null) return;
    TreeNode tNode = (TreeNode) tree.getModel ().getRoot ();
    List<TreeNode> treePath = new ArrayList<TreeNode> ();
    Iterator it = path.listIterator ();
    if (!it.hasNext ()) return;
    it.next ();
    treePath.add (tNode);
    while (tNode instanceof TNode && it.hasNext ()) {
        tNode = ((TNode) tNode).getTreeNode (it.next ());
        if (tNode == null) throw new NullPointerException ();
        treePath.add (tNode);
    }
    TreePath treePath2 = new TreePath (treePath.toArray ());
    DefaultTreeModel model = new DefaultTreeModel ((TreeNode) tree.getModel ().getRoot ());
    tree.setModel (model);
    tree.setSelectionPath (treePath2);
    tree.scrollPathToVisible (treePath2);
}