01: /*
02: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
03: *
04: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
05: *
06: * The contents of this file are subject to the terms of either the GNU
07: * General Public License Version 2 only ("GPL") or the Common
08: * Development and Distribution License("CDDL") (collectively, the
09: * "License"). You may not use this file except in compliance with the
10: * License. You can obtain a copy of the License at
11: * http://www.netbeans.org/cddl-gplv2.html
12: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
13: * specific language governing permissions and limitations under the
14: * License. When distributing the software, include this License Header
15: * Notice in each file and include the License file at
16: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
17: * particular file as subject to the "Classpath" exception as provided
18: * by Sun in the GPL Version 2 section of the License file that
19: * accompanied this code. If applicable, add the following below the
20: * License Header, with the fields enclosed by brackets [] replaced by
21: * your own identifying information:
22: * "Portions Copyrighted [year] [name of copyright owner]"
23: *
24: * Contributor(s):
25: *
26: * The Original Software is NetBeans. The Initial Developer of the Original
27: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
28: * Microsystems, Inc. All Rights Reserved.
29: *
30: * If you wish your version of this file to be governed by only the CDDL
31: * or only the GPL Version 2, indicate your decision by adding
32: * "[Contributor] elects to include this software in this distribution
33: * under the [CDDL or GPL Version 2] license." If you do not indicate a
34: * single choice of license, a recipient has the option to distribute
35: * your version of this file under either the CDDL, the GPL Version 2 or
36: * to extend the choice of license to its licensees as provided above.
37: * However, if you add GPL Version 2 code and therefore, elected the GPL
38: * Version 2 license, then the option applies only if the new code is
39: * made subject to such option by the copyright holder.
40: */
41: package org.netbeans.modules.refactoring.spi.impl;
42:
43: import java.util.Collection;
44: import java.util.Collections;
45: import java.util.HashSet;
46: import java.util.Iterator;
47: import org.netbeans.modules.refactoring.api.RefactoringElement;
48: import org.netbeans.modules.refactoring.api.RefactoringSession;
49: import org.netbeans.modules.refactoring.spi.impl.UndoManager;
50: import org.openide.cookies.EditorCookie;
51: import org.openide.loaders.DataObject;
52: import org.openide.text.CloneableEditorSupport;
53: import org.openide.text.PositionBounds;
54:
55: /**
56: *
57: * @author Martin Matula, Daniel Prusa
58: */
59: public class UndoWatcher {
60:
61: private static Collection extractCES(Collection elements) {
62: HashSet result = new HashSet();
63: for (Iterator it = elements.iterator(); it.hasNext();) {
64: RefactoringElement e = (RefactoringElement) it.next();
65: PositionBounds pb = e.getPosition();
66: if (pb != null) {
67: CloneableEditorSupport ces = pb.getBegin()
68: .getCloneableEditorSupport();
69: result.add(ces);
70: }
71: }
72: return result;
73: }
74:
75: public static void watch(RefactoringSession session,
76: InvalidationListener l) {
77: UndoManager.getDefault().watch(
78: extractCES(session.getRefactoringElements()), l);
79: }
80:
81: public static void stopWatching(InvalidationListener l) {
82: UndoManager.getDefault().stopWatching(l);
83: }
84:
85: public static void watch(DataObject o) {
86: EditorCookie ces = o.getCookie(EditorCookie.class);
87: assert ces instanceof CloneableEditorSupport;
88: UndoManager.getDefault().watch(
89: Collections.singleton((CloneableEditorSupport) ces),
90: null);
91: }
92: }
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