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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
/**********************************************************************
Audacity: A Digital Audio Editor
UndoManager.cpp
Dominic Mazzoni
**********************************************************************/
#include "UndoManager.h"
#include "Track.h"
#include "WaveTrack.h" // temp
UndoManager::UndoManager()
{
current = -1;
}
UndoManager::~UndoManager()
{
ClearStates();
}
void UndoManager::ClearStates()
{
for (int i = stack.Count() - 1; i >= 0; i--) {
TrackListIterator iter(stack[i]->tracks);
VTrack *t = iter.First();
while (t) {
delete t;
t = iter.Next();
}
stack.RemoveAt(i);
}
current = -1;
}
bool UndoManager::UndoAvailable()
{
return (current > 0);
}
bool UndoManager::RedoAvailable()
{
return (current < stack.Count() - 1);
}
void UndoManager::PushState(TrackList * l, double sel0, double sel1)
{
int i;
for (i = current + 1; i < stack.Count(); i++) {
TrackListIterator iter(stack[i]->tracks);
VTrack *t = iter.First();
while (t) {
delete t;
t = iter.Next();
}
}
i = stack.Count() - 1;
while (i > current)
stack.RemoveAt(i--);
TrackList *tracksCopy = new TrackList();
TrackListIterator iter(l);
VTrack *t = iter.First();
while (t) {
tracksCopy->Add(t->Duplicate());
t = iter.Next();
}
UndoStackElem *push = new UndoStackElem();
push->tracks = tracksCopy;
push->sel0 = sel0;
push->sel1 = sel1;
stack.Add(push);
current++;
}
TrackList *UndoManager::Undo(double *sel0, double *sel1)
{
wxASSERT(UndoAvailable());
current--;
*sel0 = stack[current]->sel0;
*sel1 = stack[current]->sel1;
return stack[current]->tracks;
}
TrackList *UndoManager::Redo(double *sel0, double *sel1)
{
wxASSERT(RedoAvailable());
current++;
*sel0 = stack[current]->sel0;
*sel1 = stack[current]->sel1;
return stack[current]->tracks;
}
void UndoManager::Debug()
{
for (int i = 0; i < stack.Count(); i++) {
TrackListIterator iter(stack[i]->tracks);
WaveTrack *t = (WaveTrack *) (iter.First());
printf("*%d* %s %d\n", i, (i == current) ? "-->" : " ",
t ? t->numSamples : 0);
}
}
|
