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Java > Open Source Codes > org > netbeans > modules > editor > errorstripe > caret > CaretMarkProvider


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
20 package org.netbeans.modules.editor.errorstripe.caret;
21 import java.util.Collections JavaDoc;
22 import java.util.List JavaDoc;
23 import javax.swing.event.CaretEvent JavaDoc;
24 import javax.swing.event.CaretListener JavaDoc;
25 import javax.swing.text.Document JavaDoc;
26 import javax.swing.text.JTextComponent JavaDoc;
27 import javax.swing.text.StyledDocument JavaDoc;
28 import org.netbeans.modules.editor.errorstripe.privatespi.Mark;
29 import org.netbeans.modules.editor.errorstripe.privatespi.MarkProvider;
30 import org.openide.text.NbDocument;
31 import org.openide.util.RequestProcessor;
32
33
34 /**
35  *
36  * @author Jan Lahoda
37  */
38 public class CaretMarkProvider extends MarkProvider implements CaretListener JavaDoc {
39     
40     private static final RequestProcessor RP = new RequestProcessor("CaretMarkProvider");
41     
42     private Mark mark;
43     private JTextComponent JavaDoc component;
44     
45     /** Creates a new instance of AnnotationMarkProvider */
46     public CaretMarkProvider(JTextComponent JavaDoc component) {
47         this.component = component;
48         component.addCaretListener(this);
49         mark = createMark();
50     }
51
52     private Mark createMark() {
53         int offset = component.getCaretPosition(); //TODO: AWT?
54 Document JavaDoc doc = component.getDocument();
55         int line = 0;
56         
57         if (doc instanceof StyledDocument JavaDoc) {
58             line = NbDocument.findLineNumber((StyledDocument JavaDoc) doc, offset);
59         }
60         
61         return new CaretMark(line);
62     }
63     
64     public synchronized List JavaDoc/*<Mark>*/ getMarks() {
65         return Collections.singletonList(mark);
66     }
67
68     public void caretUpdate(CaretEvent JavaDoc e) {
69         final List JavaDoc old = getMarks();
70         
71         mark = createMark();
72         
73         final List JavaDoc nue = getMarks();
74         
75         //Do not fire this event under the document's write lock
76 //may deadlock with other providers:
77 RP.post(new Runnable JavaDoc() {
78             public void run() {
79                 firePropertyChange(PROP_MARKS, old, nue);
80             }
81         });
82     }
83     
84 }
85
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