1 /*
2 * Copyright 1997-1998 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25 package javax.swing.event;
26
27 import java.util.EventListener;
28
29 /**
30 * Interface for an observer to register to receive notifications
31 * of changes to a text document.
32 * <p>
33 * The default implementation of
34 * the Document interface (AbstractDocument) supports asynchronous
35 * mutations. If this feature is used (i.e. mutations are made
36 * from a thread other than the Swing event thread), the listeners
37 * will be notified via the mutating thread. <em>This means that
38 * if asynchronous updates are made, the implementation of this
39 * interface must be threadsafe</em>!
40 * <p>
41 * The DocumentEvent notification is based upon the JavaBeans
42 * event model. There is no guarantee about the order of delivery
43 * to listeners, and all listeners must be notified prior to making
44 * further mutations to the Document. <em>This means implementations
45 * of the DocumentListener may not mutate the source of the event
46 * (i.e. the associated Document)</em>.
47 *
48 * @author Timothy Prinzing
49 * @see javax.swing.text.Document
50 * @see javax.swing.text.StyledDocument
51 * @see DocumentEvent
52 */
53 public interface DocumentListener extends EventListener {
54
55 /**
56 * Gives notification that there was an insert into the document. The
57 * range given by the DocumentEvent bounds the freshly inserted region.
58 *
59 * @param e the document event
60 */
61 public void insertUpdate(DocumentEvent e);
62
63 /**
64 * Gives notification that a portion of the document has been
65 * removed. The range is given in terms of what the view last
66 * saw (that is, before updating sticky positions).
67 *
68 * @param e the document event
69 */
70 public void removeUpdate(DocumentEvent e);
71
72 /**
73 * Gives notification that an attribute or set of attributes changed.
74 *
75 * @param e the document event
76 */
77 public void changedUpdate(DocumentEvent e);
78 }
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