pointer_input.h

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/*
    KWin - the KDE window manager
    This file is part of the KDE project.
 
    SPDX-FileCopyrightText: 2013, 2016 Martin Gräßlin <mgraesslin@kde.org>
    SPDX-FileCopyrightText: 2018 Roman Gilg <subdiff@gmail.com>
    SPDX-FileCopyrightText: 2019 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
 
    SPDX-License-Identifier: GPL-2.0-or-later
*/
#pragma once
 
#include "cursor.h"
#include "input.h"
#include "utils/xcursortheme.h"
 
#include <QElapsedTimer>
#include <QObject>
#include <QPointF>
#include <QPointer>
 
class QWindow;
 
namespace KWin
{
class Window;
class CursorImage;
class InputDevice;
class InputRedirection;
class CursorShape;
class ShapeCursorSource;
class SurfaceCursorSource;
class PointerSurfaceCursor;
class SurfaceInterface;
 
namespace Decoration
{
class DecoratedClientImpl;
}
 
 
class KWIN_EXPORT PointerInputRedirection : public InputDeviceHandler
{
    Q_OBJECT
public:
    explicit PointerInputRedirection(InputRedirection *parent);
    ~PointerInputRedirection() override;
 
    void init() override;
 
    void updateAfterScreenChange();
    bool supportsWarping() const;
    void warp(const QPointF &pos);
 
    QPointF pos() const
    {
        return m_pos;
    }
    Qt::MouseButtons buttons() const
    {
        return m_qtButtons;
    }
    bool areButtonsPressed() const;
 
    void setEffectsOverrideCursor(Qt::CursorShape shape);
    void removeEffectsOverrideCursor();
    void setWindowSelectionCursor(const QByteArray &shape);
    void removeWindowSelectionCursor();
 
    void updatePointerConstraints();
 
    void setEnableConstraints(bool set);
 
    bool isConstrained() const
    {
        return m_confined || m_locked;
    }
 
    bool focusUpdatesBlocked() override;
 
    void processMotionAbsolute(const QPointF &pos, std::chrono::microseconds time, InputDevice *device = nullptr);
    void processMotion(const QPointF &delta, const QPointF &deltaNonAccelerated, std::chrono::microseconds time, InputDevice *device);
    void processButton(uint32_t button, InputRedirection::PointerButtonState state, std::chrono::microseconds time, InputDevice *device = nullptr);
    void processAxis(InputRedirection::PointerAxis axis, qreal delta, qint32 deltaV120, InputRedirection::PointerAxisSource source, std::chrono::microseconds time, InputDevice *device = nullptr);
    void processSwipeGestureBegin(int fingerCount, std::chrono::microseconds time, KWin::InputDevice *device = nullptr);
    void processSwipeGestureUpdate(const QPointF &delta, std::chrono::microseconds time, KWin::InputDevice *device = nullptr);
    void processSwipeGestureEnd(std::chrono::microseconds time, KWin::InputDevice *device = nullptr);
    void processSwipeGestureCancelled(std::chrono::microseconds time, KWin::InputDevice *device = nullptr);
    void processPinchGestureBegin(int fingerCount, std::chrono::microseconds time, KWin::InputDevice *device = nullptr);
    void processPinchGestureUpdate(qreal scale, qreal angleDelta, const QPointF &delta, std::chrono::microseconds time, KWin::InputDevice *device = nullptr);
    void processPinchGestureEnd(std::chrono::microseconds time, KWin::InputDevice *device = nullptr);
    void processPinchGestureCancelled(std::chrono::microseconds time, KWin::InputDevice *device = nullptr);
    void processHoldGestureBegin(int fingerCount, std::chrono::microseconds time, KWin::InputDevice *device = nullptr);
    void processHoldGestureEnd(std::chrono::microseconds time, KWin::InputDevice *device = nullptr);
    void processHoldGestureCancelled(std::chrono::microseconds time, KWin::InputDevice *device = nullptr);
    void processFrame(KWin::InputDevice *device = nullptr);
 
private:
    void processMotionInternal(const QPointF &pos, const QPointF &delta, const QPointF &deltaNonAccelerated, std::chrono::microseconds time, InputDevice *device);
    void cleanupDecoration(Decoration::DecoratedClientImpl *old, Decoration::DecoratedClientImpl *now) override;
 
    void focusUpdate(Window *focusOld, Window *focusNow) override;
 
    QPointF position() const override;
 
    void updateOnStartMoveResize();
    void updateToReset();
    void updatePosition(const QPointF &pos);
    void updateButton(uint32_t button, InputRedirection::PointerButtonState state);
    QPointF applyPointerConfinement(const QPointF &pos) const;
    void disconnectConfinedPointerRegionConnection();
    void disconnectLockedPointerAboutToBeUnboundConnection();
    void disconnectPointerConstraintsConnection();
    void breakPointerConstraints(SurfaceInterface *surface);
    CursorImage *m_cursor;
    QPointF m_pos;
    QHash<uint32_t, InputRedirection::PointerButtonState> m_buttons;
    Qt::MouseButtons m_qtButtons;
    QMetaObject::Connection m_focusGeometryConnection;
    QMetaObject::Connection m_constraintsConnection;
    QMetaObject::Connection m_constraintsActivatedConnection;
    QMetaObject::Connection m_confinedPointerRegionConnection;
    QMetaObject::Connection m_lockedPointerAboutToBeUnboundConnection;
    QMetaObject::Connection m_decorationGeometryConnection;
    QMetaObject::Connection m_decorationDestroyedConnection;
    QMetaObject::Connection m_decorationClosedConnection;
    bool m_confined = false;
    bool m_locked = false;
    bool m_enableConstraints = true;
    bool m_lastOutputWasPlaceholder = true;
    friend class PositionUpdateBlocker;
};
 
class WaylandCursorImage : public QObject
{
    Q_OBJECT
public:
    explicit WaylandCursorImage(QObject *parent = nullptr);
 
    KXcursorTheme theme() const;
 
Q_SIGNALS:
    void themeChanged();
 
private:
    void updateCursorTheme();
 
    KXcursorTheme m_cursorTheme;
};
 
class CursorImage : public QObject
{
    Q_OBJECT
public:
    explicit CursorImage(PointerInputRedirection *parent = nullptr);
    ~CursorImage() override;
 
    void setEffectsOverrideCursor(Qt::CursorShape shape);
    void removeEffectsOverrideCursor();
    void setWindowSelectionCursor(const QByteArray &shape);
    void removeWindowSelectionCursor();
 
    KXcursorTheme theme() const;
    CursorSource *source() const;
    void setSource(CursorSource *source);
 
    void updateCursorOutputs(const QPointF &pos);
    void markAsRendered(std::chrono::milliseconds timestamp);
 
Q_SIGNALS:
    void changed();
 
private:
    void reevaluteSource();
    void updateServerCursor(const std::variant<PointerSurfaceCursor *, QByteArray> &cursor);
    void updateDecoration();
    void updateDecorationCursor();
    void updateMoveResize();
 
    void handleFocusedSurfaceChanged();
 
    PointerInputRedirection *m_pointer;
    CursorSource *m_currentSource = nullptr;
    WaylandCursorImage m_waylandImage;
 
    std::unique_ptr<ShapeCursorSource> m_effectsCursor;
    std::unique_ptr<ShapeCursorSource> m_fallbackCursor;
    std::unique_ptr<ShapeCursorSource> m_moveResizeCursor;
    std::unique_ptr<ShapeCursorSource> m_windowSelectionCursor;
 
    struct
    {
        std::unique_ptr<ShapeCursorSource> cursor;
        QMetaObject::Connection connection;
    } m_decoration;
    struct
    {
        QMetaObject::Connection connection;
        std::unique_ptr<SurfaceCursorSource> surface;
        std::unique_ptr<ShapeCursorSource> shape;
        CursorSource *cursor = nullptr;
    } m_serverCursor;
};
 
class InputRedirectionCursor : public KWin::Cursor
{
    Q_OBJECT
public:
    explicit InputRedirectionCursor();
    ~InputRedirectionCursor() override;
 
protected:
    void doSetPos() override;
 
private Q_SLOTS:
    void slotPosChanged(const QPointF &pos);
    void slotPointerButtonChanged();
    void slotModifiersChanged(Qt::KeyboardModifiers mods, Qt::KeyboardModifiers oldMods);
 
private:
    Qt::MouseButtons m_currentButtons;
};
 
}