qwindowscursor.h - mozsearch

qt/qtbase/src/plugins/platforms/windows/qwindowscursor.h

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// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

// Qt-Security score:significant reason:default

#ifndef QWINDOWSCURSOR_H

#define QWINDOWSCURSOR_H

#include <QtCore/qt_windows.h>

#include <qpa/qplatformcursor.h>

#include <QtCore/qsharedpointer.h>

#include <QtCore/qhash.h>

QT_BEGIN_NAMESPACE

struct QWindowsPixmapCursorCacheKey

    explicit QWindowsPixmapCursorCacheKey(const QCursor &c, qreal scaleFactor);

    qint64 bitmapCacheKey;

    qint64 maskCacheKey;

    union {

        qint64 hashKey;

        struct {

            qint32 x;

            qint32 y;

};

    } hotspotCacheKey;

    qreal scaleFactor;

};

inline bool operator==(const QWindowsPixmapCursorCacheKey &k1, const QWindowsPixmapCursorCacheKey &k2)

    return k1.bitmapCacheKey == k2.bitmapCacheKey &&

           k1.maskCacheKey == k2.maskCacheKey &&

           k1.hotspotCacheKey.hashKey == k2.hotspotCacheKey.hashKey &&

           k1.scaleFactor == k2.scaleFactor;

inline size_t qHash(const QWindowsPixmapCursorCacheKey &k, size_t seed) noexcept

    return (size_t(k.bitmapCacheKey) + size_t(k.maskCacheKey)) ^ seed;

class CursorHandle

    Q_DISABLE_COPY_MOVE(CursorHandle)

public:

    explicit CursorHandle(HCURSOR hcursor = nullptr) : m_hcursor(hcursor) {}

    ~CursorHandle()

        if (m_hcursor)

            DestroyCursor(m_hcursor);

    bool isNull() const { return !m_hcursor; }

    HCURSOR handle() const { return m_hcursor; }

private:

    const HCURSOR m_hcursor;

};

using CursorHandlePtr = QSharedPointer<CursorHandle>;

class QWindowsCursor : public QPlatformCursor

public:

    enum class State {

        Showing,

        Hidden,

        Suppressed // Cursor suppressed by touch interaction (Windows 8).

};

    struct PixmapCursor {

        explicit PixmapCursor(const QPixmap &pix = QPixmap(), const QPoint &h = QPoint()) : pixmap(pix), hotSpot(h) {}

        QPixmap pixmap;

        QPoint hotSpot;

};

    explicit QWindowsCursor(const QPlatformScreen *screen);

    void changeCursor(QCursor * widgetCursor, QWindow * widget) override;

    void setOverrideCursor(const QCursor &cursor) override;

    void clearOverrideCursor() override;

    static void enforceOverrideCursor();

    static bool hasOverrideCursor() { return m_overriddenCursor != nullptr; }

    QPoint pos() const override;

    void setPos(const QPoint &pos) override;

    QSize size() const override;

    static HCURSOR createPixmapCursor(QPixmap pixmap, const QPoint &hotSpot, qreal scaleFactor = 1);

    static HCURSOR createPixmapCursor(const PixmapCursor &pc, qreal scaleFactor = 1) { return createPixmapCursor(pc.pixmap, pc.hotSpot, scaleFactor); }

    static PixmapCursor customCursor(Qt::CursorShape cursorShape, const QPlatformScreen *screen = nullptr);

    static HCURSOR createCursorFromShape(Qt::CursorShape cursorShape, const QPlatformScreen *screen = nullptr);

    static QPoint mousePosition();

    static State cursorState();

    CursorHandlePtr standardWindowCursor(Qt::CursorShape s = Qt::ArrowCursor);

    CursorHandlePtr pixmapWindowCursor(const QCursor &c);

    QPixmap dragDefaultCursor(Qt::DropAction action) const;

    HCURSOR hCursor(const QCursor &c) const;

private:

    typedef QHash<Qt::CursorShape, CursorHandlePtr> StandardCursorCache;

    typedef QHash<QWindowsPixmapCursorCacheKey, CursorHandlePtr> PixmapCursorCache;

    CursorHandlePtr cursorHandle(const QCursor &c);

    const QPlatformScreen *const m_screen;

    StandardCursorCache m_standardCursorCache;

    PixmapCursorCache m_pixmapCursorCache;

    mutable QPixmap m_copyDragCursor;

    mutable QPixmap m_moveDragCursor;

    mutable QPixmap m_linkDragCursor;

    mutable QPixmap m_ignoreDragCursor;

    static HCURSOR m_overriddenCursor;

    static QCursor m_overrideCursor;

    static POINT m_cursorPositionCache;

};

QT_END_NAMESPACE

#endif // QWINDOWSCURSOR_H