| /** |
| * Copyright (c) 2008 Oracle Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Oracle Corporation - initial API and implementation |
| */ |
| package org.eclipse.jst.jsf.apache.trinidad.tagsupport; |
| |
| import org.w3c.dom.Node; |
| |
| /** |
| * Utility class for the Trinidad Tag Support plug-in. |
| * |
| * @author Ian Trimble - Oracle |
| */ |
| public class TrinidadUtils { |
| |
| private static final String KEY_CURRENT_CHILD_INDEX = |
| "KEY_CURRENT_CHILD_INDEX"; //$NON-NLS-1$ |
| |
| /** |
| * Sets the index of the Node instance's "current" child as user data on |
| * the Node instance. |
| * |
| * @param node Node instance on which to set index. |
| * @param index Index of node's "current" child. |
| * @return true if index has changed, else false. |
| */ |
| public static boolean setCurrentChildIndex(Node node, int index) { |
| boolean indexChanged = false; |
| if (node != null) { |
| int currentIndex = getCurrentChildIndex(node); |
| if (currentIndex != index) { |
| node.setUserData( |
| KEY_CURRENT_CHILD_INDEX, |
| new Integer(index), |
| null); |
| indexChanged = true; |
| } |
| } |
| return indexChanged; |
| } |
| |
| /** |
| * Gets the index of the Node instance's "current" child from user data on |
| * the Node instance. |
| * |
| * @param node Node instance from which to get index. |
| * @return Index of node's "current" child. A value of -1 indicates |
| * inability to get index from node. |
| */ |
| public static int getCurrentChildIndex(Node node) { |
| int index = -1; |
| if (node != null) { |
| Object obj = node.getUserData(KEY_CURRENT_CHILD_INDEX); |
| if (obj instanceof Integer) { |
| index = ((Integer)obj).intValue(); |
| } |
| } |
| return index; |
| } |
| |
| } |