1 /*
2  * changetilewangid.h
3  * Copyright 2017, Benjamin Trotter <bdtrotte@ucsc.edu>
4  *
5  * This file is part of Tiled.
6  *
7  * This program is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the Free
9  * Software Foundation; either version 2 of the License, or (at your option)
10  * any later version.
11  *
12  * This program is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along with
18  * this program. If not, see <http://www.gnu.org/licenses/>.
19  */
20 
21 #pragma once
22 
23 #include "wangset.h"
24 #include "undocommands.h"
25 
26 #include <QUndoCommand>
27 
28 namespace Tiled {
29 
30 class TilesetDocument;
31 
32 class ChangeTileWangId : public QUndoCommand
33 {
34 public:
35     struct WangIdChange {
WangIdChangeWangIdChange36         WangIdChange(WangId from, WangId to, int tileId)
37             : from(from)
38             , to(to)
39             , tileId(tileId)
40         {}
41 
WangIdChangeWangIdChange42         WangIdChange()
43         {}
44 
45         WangId from;
46         WangId to;
47         int tileId = 0;
48     };
49 
50     ChangeTileWangId();
51 
52     ChangeTileWangId(TilesetDocument *tilesetDocument,
53                      WangSet *wangSet,
54                      Tile *tile,
55                      WangId wangId);
56 
57     ChangeTileWangId(TilesetDocument *tilesetDocument,
58                      WangSet *wangSet,
59                      const QVector<WangIdChange> &changes,
60                      QUndoCommand *parent = nullptr);
61 
62     void undo() override;
63     void redo() override;
id()64     int id() const override { return Cmd_ChangeTileWangId; }
65     bool mergeWith(const QUndoCommand *other) override;
66 
67     static QVector<WangIdChange> changesOnSetColorCount(const WangSet *wangSet,
68                                                         int colorCount);
69 
70     static QVector<WangIdChange> changesOnRemoveColor(const WangSet *wangSet,
71                                                       int removedColor);
72 
73     static void applyChanges(WangSet *wangSet, const QVector<WangIdChange> &changes);
74 
75 private:
76     Tile *findTile(int tileId) const;
77 
78     TilesetDocument *mTilesetDocument;
79     WangSet *mWangSet;
80     QVector<WangIdChange> mChanges;
81     bool mMergeable;
82 };
83 
84 } // namespace Tiled
85