1 /****************************************************************************
2 **
3 ** Copyright (C) 2016 The Qt Company Ltd.
4 ** Contact: https://www.qt.io/licensing/
5 **
6 ** This file is part of the plugins of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** Commercial License Usage
10 ** Licensees holding valid commercial Qt licenses may use this file in
11 ** accordance with the commercial license agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and The Qt Company. For licensing terms
14 ** and conditions see https://www.qt.io/terms-conditions. For further
15 ** information use the contact form at https://www.qt.io/contact-us.
16 **
17 ** GNU Lesser General Public License Usage
18 ** Alternatively, this file may be used under the terms of the GNU Lesser
19 ** General Public License version 3 as published by the Free Software
20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the
21 ** packaging of this file. Please review the following information to
22 ** ensure the GNU Lesser General Public License version 3 requirements
23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24 **
25 ** GNU General Public License Usage
26 ** Alternatively, this file may be used under the terms of the GNU
27 ** General Public License version 2.0 or (at your option) the GNU General
28 ** Public license version 3 or any later version approved by the KDE Free
29 ** Qt Foundation. The licenses are as published by the Free Software
30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31 ** included in the packaging of this file. Please review the following
32 ** information to ensure the GNU General Public License requirements will
33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34 ** https://www.gnu.org/licenses/gpl-3.0.html.
35 **
36 ** $QT_END_LICENSE$
37 **
38 ****************************************************************************/
39
40 #ifndef QXCBCURSOR_H
41 #define QXCBCURSOR_H
42
43 #include <qpa/qplatformcursor.h>
44 #include "qxcbscreen.h"
45
46 #include <QtCore/QCache>
47
48 QT_BEGIN_NAMESPACE
49
50 #ifndef QT_NO_CURSOR
51
52 struct QXcbCursorCacheKey
53 {
54 explicit QXcbCursorCacheKey(const QCursor &c);
QXcbCursorCacheKeyQXcbCursorCacheKey55 explicit QXcbCursorCacheKey(Qt::CursorShape s) : shape(s), bitmapCacheKey(0), maskCacheKey(0) {}
QXcbCursorCacheKeyQXcbCursorCacheKey56 QXcbCursorCacheKey() : shape(Qt::CustomCursor), bitmapCacheKey(0), maskCacheKey(0) {}
57
58 Qt::CursorShape shape;
59 qint64 bitmapCacheKey;
60 qint64 maskCacheKey;
61 };
62
63 inline bool operator==(const QXcbCursorCacheKey &k1, const QXcbCursorCacheKey &k2)
64 {
65 return k1.shape == k2.shape && k1.bitmapCacheKey == k2.bitmapCacheKey && k1.maskCacheKey == k2.maskCacheKey;
66 }
67
qHash(const QXcbCursorCacheKey & k,uint seed)68 inline uint qHash(const QXcbCursorCacheKey &k, uint seed) noexcept
69 {
70 return (uint(k.shape) + uint(k.bitmapCacheKey) + uint(k.maskCacheKey)) ^ seed;
71 }
72
73 #endif // !QT_NO_CURSOR
74
75 class QXcbCursor : public QXcbObject, public QPlatformCursor
76 {
77 public:
78 QXcbCursor(QXcbConnection *conn, QXcbScreen *screen);
79 ~QXcbCursor();
80 #ifndef QT_NO_CURSOR
81 void changeCursor(QCursor *cursor, QWindow *window) override;
82 #endif
83 QPoint pos() const override;
84 void setPos(const QPoint &pos) override;
85
86 static void queryPointer(QXcbConnection *c, QXcbVirtualDesktop **virtualDesktop, QPoint *pos, int *keybMask = nullptr);
87
88 #ifndef QT_NO_CURSOR
xcbCursor(const QCursor & c)89 xcb_cursor_t xcbCursor(const QCursor &c) const
90 { return m_cursorHash.value(QXcbCursorCacheKey(c), xcb_cursor_t(0)); }
91 #endif
92
93 private:
94
95 #ifndef QT_NO_CURSOR
96 typedef QHash<QXcbCursorCacheKey, xcb_cursor_t> CursorHash;
97
98 struct CachedCursor
99 {
CachedCursorCachedCursor100 explicit CachedCursor(xcb_connection_t *conn, xcb_cursor_t c)
101 : cursor(c), connection(conn) {}
~CachedCursorCachedCursor102 ~CachedCursor() { xcb_free_cursor(connection, cursor); }
103 xcb_cursor_t cursor;
104 xcb_connection_t *connection;
105 };
106 typedef QCache<QXcbCursorCacheKey, CachedCursor> BitmapCursorCache;
107
108 xcb_cursor_t createFontCursor(int cshape);
109 xcb_cursor_t createBitmapCursor(QCursor *cursor);
110 xcb_cursor_t createNonStandardCursor(int cshape);
111 #endif
112
113 QXcbScreen *m_screen;
114 #ifndef QT_NO_CURSOR
115 CursorHash m_cursorHash;
116 BitmapCursorCache m_bitmapCache;
117 #endif
118 #if QT_CONFIG(xcb_xlib) && QT_CONFIG(library)
119 static void cursorThemePropertyChanged(QXcbVirtualDesktop *screen,
120 const QByteArray &name,
121 const QVariant &property,
122 void *handle);
123 #endif
124 bool m_gtkCursorThemeInitialized;
125 };
126
127 QT_END_NAMESPACE
128
129 #endif
130