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Java > Open Source Codes > org > netbeans > modules > refactoring > spi > impl > UndoWatcher


1 /*
2  * The contents of this file are subject to the terms of the Common Development
3  * and Distribution License (the License). You may not use this file except in
4  * compliance with the License.
5  *
6  * You can obtain a copy of the License at http://www.netbeans.org/cddl.html
7  * or http://www.netbeans.org/cddl.txt.
8  *
9  * When distributing Covered Code, include this CDDL Header Notice in each file
10  * and include the License file at http://www.netbeans.org/cddl.txt.
11  * If applicable, add the following below the CDDL Header, with the fields
12  * enclosed by brackets [] replaced by your own identifying information:
13  * "Portions Copyrighted [year] [name of copyright owner]"
14  *
15  * The Original Software is NetBeans. The Initial Developer of the Original
16  * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
17  * Microsystems, Inc. All Rights Reserved.
18  */
19 package org.netbeans.modules.refactoring.spi.impl;
20
21 import java.util.Collection JavaDoc;
22 import java.util.Collections JavaDoc;
23 import java.util.HashSet JavaDoc;
24 import java.util.Iterator JavaDoc;
25 import org.netbeans.modules.refactoring.api.RefactoringElement;
26 import org.netbeans.modules.refactoring.api.RefactoringSession;
27 import org.netbeans.modules.refactoring.spi.impl.UndoManager;
28 import org.openide.cookies.EditorCookie;
29 import org.openide.loaders.DataObject;
30 import org.openide.text.CloneableEditorSupport;
31 import org.openide.text.PositionBounds;
32
33 /**
34  *
35  * @author Martin Matula, Daniel Prusa
36  */
37 public class UndoWatcher {
38
39      private static Collection JavaDoc extractCES(Collection JavaDoc elements) {
40         HashSet JavaDoc result = new HashSet JavaDoc();
41         for (Iterator JavaDoc it = elements.iterator(); it.hasNext();) {
42             RefactoringElement e = (RefactoringElement) it.next();
43             PositionBounds pb = e.getPosition();
44             if (pb != null) {
45                 CloneableEditorSupport ces = pb.getBegin().getCloneableEditorSupport();
46                 result.add(ces);
47             }
48         }
49         return result;
50     }
51
52     public static void watch(RefactoringSession session, InvalidationListener l) {
53         UndoManager.getDefault().watch(extractCES(session.getRefactoringElements()), l);
54     }
55
56     public static void stopWatching(InvalidationListener l) {
57         UndoManager.getDefault().stopWatching(l);
58     }
59     
60     public static void watch(DataObject o) {
61         EditorCookie ces = o.getCookie(EditorCookie.class);
62         assert ces instanceof CloneableEditorSupport;
63         UndoManager.getDefault().watch(Collections.singleton((CloneableEditorSupport)ces), null);
64     }
65 }
66
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