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15 package org.wings.text;
16
17 import org.wings.event.SDocumentEvent;
18 import org.wings.event.SDocumentListener;
19
20 import javax.swing.event.EventListenerList  ;
21 import javax.swing.text.BadLocationException ;
22
23
27 public class DefaultDocument implements SDocument {
28 private final StringBuffer buffer = new StringBuffer ();
29 private EventListenerList listeners = null;
30
31 public DefaultDocument() {
32 }
33
34 public DefaultDocument(String text) {
35 buffer.append(text);
36 }
37
38 public void setText(String text) {
39 String origText = buffer.toString();
40 if (origText.equals(text)) {
41 return;
42 }
43 buffer.setLength(0);
44 if (text != null)
45 buffer.append(text);
46 fireChangeUpdate(0, buffer.length());
47 }
48
49 public String getText() {
50 return buffer.toString();
51 }
52
53 public String getText(int offset, int length) throws BadLocationException {
54 try {
55 return buffer.substring(offset, length);
56 } catch (IndexOutOfBoundsException e) {
57 throw new BadLocationException (e.getMessage(), offset);
58 }
59 }
60
61 public int getLength() {
62 return buffer.length();
63 }
64
65 public void remove(int offset, int length) throws BadLocationException {
66 if (length == 0) {
67 return;
68 }
69 try {
70 buffer.delete(offset, offset + length);
71 fireRemoveUpdate(offset, length);
72 } catch (IndexOutOfBoundsException e) {
73 throw new BadLocationException (e.getMessage(), offset);
74 }
75 }
76
77 public void insert(int offset, String string) throws BadLocationException {
78 if (string == null || string.length() == 0) {
79 return;
80 }
81 try {
82 buffer.insert(offset, string);
83 fireInsertUpdate(offset, string.length());
84 } catch (IndexOutOfBoundsException e) {
85 throw new BadLocationException (e.getMessage(), offset);
86 }
87 }
88
89 public void addDocumentListener(SDocumentListener listener) {
90 if (listeners == null)
91 listeners = new EventListenerList ();
92 listeners.add(SDocumentListener.class, listener);
93 }
94
95 public void removeDocumentListener(SDocumentListener listener) {
96 if (listeners == null)
97 return;
98 listeners.remove(SDocumentListener.class, listener);
99 }
100
101 protected void fireInsertUpdate(int offset, int length) {
102 if (listeners == null || listeners.getListenerCount() == 0)
103 return;
104
105 SDocumentEvent e = new SDocumentEvent(this, offset, length, SDocumentEvent.INSERT);
106
107 Object [] listeners = this.listeners.getListenerList();
108 for (int i = listeners.length - 2; i >= 0; i -= 2) {
109 ((SDocumentListener) listeners[i + 1]).insertUpdate(e);
110 }
111 }
112
113 protected void fireRemoveUpdate(int offset, int length) {
114 if (listeners == null || listeners.getListenerCount() == 0)
115 return;
116
117 SDocumentEvent e = new SDocumentEvent(this, offset, length, SDocumentEvent.INSERT);
118
119 Object [] listeners = this.listeners.getListenerList();
120 for (int i = listeners.length - 2; i >= 0; i -= 2) {
121 ((SDocumentListener) listeners[i + 1]).removeUpdate(e);
122 }
123 }
124
125 protected void fireChangeUpdate(int offset, int length) {
126 if (listeners == null || listeners.getListenerCount() == 0)
127 return;
128
129 SDocumentEvent e = new SDocumentEvent(this, offset, length, SDocumentEvent.INSERT);
130
131 Object [] listeners = this.listeners.getListenerList();
132 for (int i = listeners.length - 2; i >= 0; i -= 2) {
133 ((SDocumentListener) listeners[i + 1]).changedUpdate(e);
134 }
135 }
136 }
137 |
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