qwaylandsurface_p.h

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// Copyright (C) 2019 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 QWAYLANDSURFACE_P_H
#define QWAYLANDSURFACE_P_H
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#include <QtGui/QScreen>
 
#include <QtWaylandClient/private/qwayland-wayland.h>
#include <QtCore/private/qglobal_p.h>
 
#include <variant>
 
QT_BEGIN_NAMESPACE
 
namespace QtWaylandClient {
 
class QWaylandScreen;
class QWaylandSurfaceInputHandler;
class QWaylandDisplay;
class QWaylandWindow;
class QWaylandDecorationSurface;
 
class QWaylandSurface : public QObject, public QtWayland::wl_surface
{
    Q_OBJECT
public:
    explicit QWaylandSurface(QWaylandDisplay *display);
    ~QWaylandSurface() override;
    QWaylandScreen *oldestEnteredScreen();
    QWaylandDecorationSurface *decoration() const
    {
        if (auto decoration = std::get_if<QWaylandDecorationSurface *>(&m_container))
            return *decoration;
        return nullptr;
    }
    QWaylandWindow *waylandWindow() const
    {
        if (auto window = std::get_if<QWaylandWindow *>(&m_container))
            return *window;
        return nullptr;
    }
    std::optional<int32_t> preferredBufferScale() const { return m_preferredBufferScale; }
    std::optional<wl_output_transform> preferredBufferTransform() const { return m_preferredBufferTransform; }
 
    static QWaylandSurface *fromWlSurface(::wl_surface *surface);
 
Q_SIGNALS:
    void screensChanged();
    void preferredBufferScaleChanged();
    void preferredBufferTransformChanged();
 
private Q_SLOTS:
    void handleScreenRemoved(QScreen *qScreen);
 
protected:
    void surface_enter(struct ::wl_output *output) override;
    void surface_leave(struct ::wl_output *output) override;
    void surface_preferred_buffer_scale(int32_t scale) override;
    void surface_preferred_buffer_transform(uint32_t transform) override;
 
    QList<QWaylandScreen *> m_screens; //As seen by wl_surface.enter/leave events. Chronological order.
 
    std::variant<QWaylandWindow *, QWaylandDecorationSurface *> m_container = static_cast<QWaylandWindow *>(nullptr); // what this surface is for
    std::optional<int32_t> m_preferredBufferScale;
    std::optional<wl_output_transform> m_preferredBufferTransform;
 
    friend class QWaylandWindow;
    friend class QWaylandDecorationSurface;
};
 
} // namespace QtWaylandClient
 
QT_END_NAMESPACE
 
#endif // QWAYLANDSURFACE_P_H