Unity 8
windowstatestorage.h
1 /*
2  * Copyright 2015-2016 Canonical Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU Lesser General Public License as published by
6  * the Free Software Foundation; version 3.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU Lesser General Public License for more details.
12  *
13  * You should have received a copy of the GNU Lesser General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  */
16 
17 #include <QObject>
18 #include <QSqlDatabase>
19 #include <QMutex>
20 #include <QFuture>
21 #include <QThreadPool>
22 
23 // unity-api
24 #include <unity/shell/application/Mir.h>
25 
26 class WindowStateStorage: public QObject
27 {
28  Q_OBJECT
29 public:
30  enum WindowState {
31  WindowStateNormal = 1 << 0,
32  WindowStateMaximized = 1 << 1,
33  WindowStateMinimized = 1 << 2,
34  WindowStateFullscreen = 1 << 3,
35  WindowStateMaximizedLeft = 1 << 4,
36  WindowStateMaximizedRight = 1 << 5,
37  WindowStateMaximizedHorizontally = 1 << 6,
38  WindowStateMaximizedVertically = 1 << 7,
39  WindowStateMaximizedTopLeft = 1 << 8,
40  WindowStateMaximizedTopRight = 1 << 9,
41  WindowStateMaximizedBottomLeft = 1 << 10,
42  WindowStateMaximizedBottomRight = 1 << 11,
43  WindowStateRestored = 1 << 12
44  };
45  Q_ENUM(WindowState)
46  Q_DECLARE_FLAGS(WindowStates, WindowState)
47  Q_FLAG(WindowStates)
48 
49  WindowStateStorage(QObject *parent = nullptr);
50  virtual ~WindowStateStorage();
51 
52  Q_INVOKABLE void saveState(const QString &windowId, WindowState state);
53  Q_INVOKABLE WindowState getState(const QString &windowId, WindowState defaultValue) const;
54 
55  Q_INVOKABLE void saveGeometry(const QString &windowId, const QRect &rect);
56  Q_INVOKABLE QRect getGeometry(const QString &windowId, const QRect &defaultValue) const;
57 
58  Q_INVOKABLE void saveStage(const QString &appId, int stage);
59  Q_INVOKABLE int getStage(const QString &appId, int defaultValue) const;
60 
61  Q_INVOKABLE Mir::State toMirState(WindowState state) const;
62 
63 private:
64  void initdb();
65 
66  void saveValue(const QString &queryString);
67  QSqlQuery getValue(const QString &queryString) const;
68 
69  static void executeAsyncQuery(const QString &queryString);
70  static QMutex s_mutex;
71 
72  // NB: This is accessed from threads. Make sure to mutex it.
73  QSqlDatabase m_db;
74 
75  QList<QFuture<void>> m_asyncQueries;
76  QThreadPool m_threadPool;
77 };