CuteLogger
Fast and simple logging solution for Qt based applications
undohelper.h
1/*
2 * Copyright (c) 2015-2020 Meltytech, LLC
3 *
4 * This program is free software: you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation, either version 3 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
16 */
17
18#ifndef UNDOHELPER_H
19#define UNDOHELPER_H
20
21#include "models/multitrackmodel.h"
22#include <MltPlaylist.h>
23#include <QString>
24#include <QMap>
25#include <QList>
26#include <QSet>
27
28class UndoHelper
29{
30public:
31 enum OptimizationHints {
32 NoHints,
33 SkipXML,
34 RestoreTracks
35 };
36 UndoHelper(MultitrackModel &model);
37
38 void recordBeforeState();
39 void recordAfterState();
40 void undoChanges();
41 void setHints(OptimizationHints hints);
42 QSet<int> affectedTracks() const
43 {
44 return m_affectedTracks;
45 }
46
47private:
48 void debugPrintState(const QString &title);
49 void restoreAffectedTracks();
50 void fixTransitions(Mlt::Playlist playlist, int clipIndex, Mlt::Producer clip);
51
52 enum ChangeFlags {
53 NoChange = 0x0,
54 ClipInfoModified = 0x1,
55 XMLModified = 0x2,
56 Moved = 0x4,
57 Removed = 0x8
58 };
59
60 struct Info {
61 int oldTrackIndex;
62 int oldClipIndex;
63 int newTrackIndex;
64 int newClipIndex;
65 bool isBlank;
66 QString xml;
67 int frame_in;
68 int frame_out;
69 int in_delta;
70 int out_delta;
71 int group;
72
73 int changes;
74 Info()
75 : oldTrackIndex(-1)
76 , oldClipIndex(-1)
77 , newTrackIndex(-1)
78 , newClipIndex(-1)
79 , isBlank(false)
80 , frame_in(-1)
81 , frame_out(-1)
82 , in_delta(0)
83 , out_delta(0)
84 , changes(NoChange)
85 , group(-1)
86 {}
87 };
88 QMap<QUuid, Info> m_state;
89 QList<QUuid> m_clipsAdded;
90 QList<QUuid> m_insertedOrder;
91 QSet<int> m_affectedTracks;
92 MultitrackModel &m_model;
93 OptimizationHints m_hints;
94};
95
96#endif // UNDOHELPER_H