1// Copyright (C) 2022 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#pragma once
5
6#include <qpa/qplatformcursor.h>
7#include "qxcbscreen.h"
8#include <xcb/xcb_cursor.h>
9
10#include <QtCore/QCache>
11
12QT_BEGIN_NAMESPACE
13
14#ifndef QT_NO_CURSOR
15
16struct QXcbCursorCacheKey
17{
18 explicit QXcbCursorCacheKey(const QCursor &c);
19 explicit QXcbCursorCacheKey(Qt::CursorShape s) : shape(s), bitmapCacheKey(0), maskCacheKey(0) {}
20 QXcbCursorCacheKey() : shape(Qt::CustomCursor), bitmapCacheKey(0), maskCacheKey(0) {}
21
22 Qt::CursorShape shape;
23 qint64 bitmapCacheKey;
24 qint64 maskCacheKey;
25};
26
27inline bool operator==(const QXcbCursorCacheKey &k1, const QXcbCursorCacheKey &k2)
28{
29 return k1.shape == k2.shape && k1.bitmapCacheKey == k2.bitmapCacheKey && k1.maskCacheKey == k2.maskCacheKey;
30}
31
32inline size_t qHash(const QXcbCursorCacheKey &k, size_t seed) noexcept
33{
34 return (size_t(k.shape) + size_t(k.bitmapCacheKey) + size_t(k.maskCacheKey)) ^ seed;
35}
36
37#endif // !QT_NO_CURSOR
38
39class QXcbCursor : public QXcbObject, public QPlatformCursor
40{
41public:
42 QXcbCursor(QXcbConnection *conn, QXcbScreen *screen);
43 ~QXcbCursor();
44#ifndef QT_NO_CURSOR
45 void changeCursor(QCursor *cursor, QWindow *window) override;
46#endif
47 QPoint pos() const override;
48 void setPos(const QPoint &pos) override;
49
50 QSize size() const override;
51
52 void updateContext();
53
54 static void queryPointer(QXcbConnection *c, QXcbVirtualDesktop **virtualDesktop, QPoint *pos, int *keybMask = nullptr);
55
56#ifndef QT_NO_CURSOR
57 xcb_cursor_t xcbCursor(const QCursor &c) const
58 { return m_cursorHash.value(key: QXcbCursorCacheKey(c), defaultValue: xcb_cursor_t(0)); }
59#endif
60
61private:
62
63#ifndef QT_NO_CURSOR
64 typedef QHash<QXcbCursorCacheKey, xcb_cursor_t> CursorHash;
65
66 struct CachedCursor
67 {
68 explicit CachedCursor(xcb_connection_t *conn, xcb_cursor_t c)
69 : cursor(c), connection(conn) {}
70 ~CachedCursor() { xcb_free_cursor(c: connection, cursor); }
71 xcb_cursor_t cursor;
72 xcb_connection_t *connection;
73 };
74 typedef QCache<QXcbCursorCacheKey, CachedCursor> BitmapCursorCache;
75
76 xcb_cursor_t createFontCursor(int cshape);
77 xcb_cursor_t createBitmapCursor(QCursor *cursor);
78 xcb_cursor_t createNonStandardCursor(int cshape);
79#endif
80
81 QXcbScreen *m_screen;
82 xcb_cursor_context_t *m_cursorContext;
83#ifndef QT_NO_CURSOR
84 CursorHash m_cursorHash;
85 BitmapCursorCache m_bitmapCache;
86#endif
87 static void cursorThemePropertyChanged(QXcbVirtualDesktop *screen,
88 const QByteArray &name,
89 const QVariant &property,
90 void *handle);
91 bool m_callbackForPropertyRegistered;
92};
93
94QT_END_NAMESPACE
95

source code of qtbase/src/plugins/platforms/xcb/qxcbcursor.h