| /******************************************************************************* |
| * Copyright (c) 2005, 2006 IBM 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.internal.dialogs; |
| |
| import java.util.Collection; |
| import java.util.HashSet; |
| |
| import org.eclipse.jface.preference.IPreferenceNode; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.jface.viewers.ViewerFilter; |
| |
| /** |
| * The PreferenceNodeFilter is a filter that only matches |
| * a set of ids. |
| */ |
| public class PreferenceNodeFilter extends ViewerFilter { |
| |
| Collection ids = new HashSet(); |
| |
| /** |
| * Create a new instance of the receiver on a |
| * list of filteredIds. |
| * @param filteredIds The collection of ids that |
| * will be shown. |
| */ |
| public PreferenceNodeFilter(String[] filteredIds) { |
| super(); |
| for (int i = 0; i < filteredIds.length; i++) { |
| ids.add(filteredIds[i]); |
| } |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.viewers.ViewerFilter#select(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object) |
| */ |
| public boolean select(Viewer viewer, Object parentElement, Object element) { |
| return checkNodeAndChildren((IPreferenceNode) element); |
| } |
| |
| /** |
| * Check to see if the node or any of its children |
| * have an id in the ids. |
| * @param node WorkbenchPreferenceNode |
| * @return boolean <code>true</code> if node or oe of its children |
| * has an id in the ids. |
| */ |
| private boolean checkNodeAndChildren(IPreferenceNode node) { |
| if(ids.contains(node.getId())) { |
| return true; |
| } |
| |
| IPreferenceNode[] subNodes = node.getSubNodes(); |
| for (int i = 0; i < subNodes.length; i++) { |
| if(checkNodeAndChildren(subNodes[i])) { |
| return true; |
| } |
| |
| } |
| return false; |
| } |
| |
| } |