1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
package org.herac.tuxguitar.gui.undo.undoables;
import java.util.ArrayList;
import java.util.List;
import org.herac.tuxguitar.gui.undo.CannotRedoException;
import org.herac.tuxguitar.gui.undo.CannotUndoException;
import org.herac.tuxguitar.gui.undo.UndoableEdit;
public class UndoableJoined implements UndoableEdit{
private int doAction;
private UndoableCaretHelper undoCaret;
private UndoableCaretHelper redoCaret;
private List undoables;
public UndoableJoined(){
this.doAction = UNDO_ACTION;
this.undoCaret = new UndoableCaretHelper();
this.undoables = new ArrayList();
}
public void addUndoableEdit(UndoableEdit undoable){
this.undoables.add(undoable);
}
public void redo() throws CannotRedoException {
int count = this.undoables.size();
for(int i = 0;i < count;i++){
UndoableEdit undoable = (UndoableEdit)this.undoables.get(i);
undoable.redo();
}
this.redoCaret.update();
this.doAction = UNDO_ACTION;
}
public void undo() throws CannotUndoException {
int count = this.undoables.size();
for(int i = (count - 1);i >= 0;i--){
UndoableEdit undoable = (UndoableEdit)this.undoables.get(i);
undoable.undo();
}
this.undoCaret.update();
this.doAction = REDO_ACTION;
}
public boolean canRedo() {
return (this.doAction == REDO_ACTION);
}
public boolean canUndo() {
return (this.doAction == UNDO_ACTION);
}
public UndoableJoined endUndo(){
this.redoCaret = new UndoableCaretHelper();
return this;
}
}
|