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:
42: package org.netbeans.modules.gsfret.navigation;
43:
44: import org.netbeans.modules.gsf.api.CancellableTask;
45: import org.netbeans.napi.gsfret.source.CompilationInfo;
46: import org.openide.filesystems.FileObject;
47:
48: /**
49: * This file is originally from Retouche, the Java Support
50: * infrastructure in NetBeans. I have modified the file as little
51: * as possible to make merging Retouche fixes back as simple as
52: * possible.
53: * <p>
54: * This task is called every time the caret position changes in a GSF editor.
55: * It delegates to the navigator to show the current selection.
56: */
57: public class CaretListeningTask implements
58: CancellableTask<CompilationInfo> {
59:
60: private FileObject fileObject;
61: private boolean canceled;
62:
63: CaretListeningTask(FileObject fileObject) {
64: this .fileObject = fileObject;
65: }
66:
67: public void run(CompilationInfo compilationInfo) {
68: resume();
69:
70: boolean navigatorShouldUpdate = ClassMemberPanel.getInstance() != null; // XXX set by navigator visible
71:
72: if (isCancelled() || (!navigatorShouldUpdate)) {
73: return;
74: }
75:
76: int offset = CaretListeningFactory.getLastPosition(fileObject);
77: if (offset != -1) {
78: ClassMemberPanel.getInstance().selectElement(offset);
79: }
80: }
81:
82: /**
83: * After this method is called the task if running should exit the run
84: * method immediately.
85: */
86: public final synchronized void cancel() {
87: canceled = true;
88: }
89:
90: protected final synchronized boolean isCancelled() {
91: return canceled;
92: }
93:
94: protected final synchronized void resume() {
95: canceled = false;
96: }
97: }
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