1 package net.sf.bibkeeper.undo;
2
3 import javax.swing.undo;
4 import net.sf.bibkeeper;
5
6 /**
7 * This class represents a change in any field value. The relevant
8 * information is the BibtexEntry, the field name, the old and the
9 * new value. Old/new values can be null.
10 */
11 public class UndoablePreambleChange extends AbstractUndoableEdit {
12
13 private BibtexDatabase base;
14 private String oldValue, newValue;
15 private BibtexBaseFrame baseFrame;
16
17 public UndoablePreambleChange(BibtexDatabase base, BibtexBaseFrame baseFrame,
18 String oldValue, String newValue) {
19 this.base = base;
20 this.oldValue = oldValue;
21 this.newValue = newValue;
22 this.baseFrame = baseFrame;
23 }
24
25 public String getUndoPresentationName() {
26 return "Undo: change preamble";
27 }
28
29 public String getRedoPresentationName() {
30 return "Redo: change preamble";
31 }
32
33 public void undo() {
34 super.undo();
35
36 // Revert the change.
37 base.setPreamble(oldValue);
38
39 // If the preamble editor is open, update it.
40 baseFrame.updatePreamble();
41 }
42
43 public void redo() {
44 super.redo();
45
46 // Redo the change.
47 base.setPreamble(newValue);
48
49 // If the preamble editor is open, update it.
50 baseFrame.updatePreamble();
51
52 }
53
54
55
56 }
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