| 1 | // Copyright (C) 2022 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #ifndef QXCBCURSOR_H |
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| 5 | #define QXCBCURSOR_H |
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| 6 | |
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| 7 | #include <qpa/qplatformcursor.h> |
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| 8 | #include "qxcbscreen.h" |
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| 9 | #include <xcb/xcb_cursor.h> |
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| 10 | |
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| 11 | #include <QtCore/QCache> |
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| 12 | |
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| 13 | QT_BEGIN_NAMESPACE |
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| 14 | |
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| 15 | #ifndef QT_NO_CURSOR |
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| 16 | |
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| 17 | struct QXcbCursorCacheKey |
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| 18 | { |
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| 19 | explicit QXcbCursorCacheKey(const QCursor &c); |
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| 20 | explicit QXcbCursorCacheKey(Qt::CursorShape s) : shape(s), bitmapCacheKey(0), maskCacheKey(0) {} |
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| 21 | QXcbCursorCacheKey() : shape(Qt::CustomCursor), bitmapCacheKey(0), maskCacheKey(0) {} |
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| 22 | |
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| 23 | Qt::CursorShape shape; |
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| 24 | qint64 bitmapCacheKey; |
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| 25 | qint64 maskCacheKey; |
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| 26 | }; |
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| 27 | |
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| 28 | inline bool operator==(const QXcbCursorCacheKey &k1, const QXcbCursorCacheKey &k2) |
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| 29 | { |
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| 30 | return k1.shape == k2.shape && k1.bitmapCacheKey == k2.bitmapCacheKey && k1.maskCacheKey == k2.maskCacheKey; |
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| 31 | } |
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| 32 | |
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| 33 | inline size_t qHash(const QXcbCursorCacheKey &k, size_t seed) noexcept |
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| 34 | { |
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| 35 | return (size_t(k.shape) + size_t(k.bitmapCacheKey) + size_t(k.maskCacheKey)) ^ seed; |
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| 36 | } |
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| 37 | |
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| 38 | #endif // !QT_NO_CURSOR |
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| 39 | |
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| 40 | class QXcbCursor : public QXcbObject, public QPlatformCursor |
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| 41 | { |
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| 42 | public: |
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| 43 | QXcbCursor(QXcbConnection *conn, QXcbScreen *screen); |
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| 44 | ~QXcbCursor(); |
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| 45 | #ifndef QT_NO_CURSOR |
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| 46 | void changeCursor(QCursor *cursor, QWindow *window) override; |
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| 47 | #endif |
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| 48 | QPoint pos() const override; |
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| 49 | void setPos(const QPoint &pos) override; |
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| 50 | |
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| 51 | QSize size() const override; |
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| 52 | |
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| 53 | void updateContext(); |
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| 54 | |
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| 55 | static void queryPointer(QXcbConnection *c, QXcbVirtualDesktop **virtualDesktop, QPoint *pos, int *keybMask = nullptr); |
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| 56 | |
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| 57 | #ifndef QT_NO_CURSOR |
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| 58 | xcb_cursor_t xcbCursor(const QCursor &c) const |
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| 59 | { return m_cursorHash.value(key: QXcbCursorCacheKey(c), defaultValue: xcb_cursor_t(0)); } |
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| 60 | #endif |
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| 61 | |
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| 62 | private: |
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| 63 | |
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| 64 | #ifndef QT_NO_CURSOR |
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| 65 | typedef QHash<QXcbCursorCacheKey, xcb_cursor_t> CursorHash; |
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| 66 | |
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| 67 | struct CachedCursor |
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| 68 | { |
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| 69 | explicit CachedCursor(xcb_connection_t *conn, xcb_cursor_t c) |
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| 70 | : cursor(c), connection(conn) {} |
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| 71 | ~CachedCursor() { xcb_free_cursor(c: connection, cursor); } |
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| 72 | xcb_cursor_t cursor; |
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| 73 | xcb_connection_t *connection; |
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| 74 | }; |
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| 75 | typedef QCache<QXcbCursorCacheKey, CachedCursor> BitmapCursorCache; |
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| 76 | |
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| 77 | xcb_cursor_t createFontCursor(int cshape); |
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| 78 | xcb_cursor_t createBitmapCursor(QCursor *cursor); |
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| 79 | xcb_cursor_t createNonStandardCursor(int cshape); |
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| 80 | #endif |
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| 81 | |
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| 82 | QXcbScreen *m_screen; |
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| 83 | xcb_cursor_context_t *m_cursorContext; |
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| 84 | #ifndef QT_NO_CURSOR |
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| 85 | CursorHash m_cursorHash; |
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| 86 | BitmapCursorCache m_bitmapCache; |
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| 87 | #endif |
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| 88 | static void cursorThemePropertyChanged(QXcbVirtualDesktop *screen, |
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| 89 | const QByteArray &name, |
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| 90 | const QVariant &property, |
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| 91 | void *handle); |
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| 92 | bool m_callbackForPropertyRegistered; |
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| 93 | }; |
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| 94 | |
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| 95 | QT_END_NAMESPACE |
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| 96 | |
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| 97 | #endif |
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| 98 | |
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