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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

#ifndef QWAYLANDCOMPOSITOR_H
#define QWAYLANDCOMPOSITOR_H

#include <QtWaylandCompositor/qtwaylandcompositorglobal.h>
#include <QtWaylandCompositor/qtwaylandqmlinclude.h>
#include <QtWaylandCompositor/qwaylandcompositorextension.h>
#include <QtWaylandCompositor/QWaylandOutput>

#include <QtCore/QObject>
#include <QtGui/QImage>
#include <QtCore/QRect>
#include <QtCore/QLoggingCategory>

struct wl_display;

QT_BEGIN_NAMESPACE

class QInputEvent;

class QMimeData;
class QUrl;
class QOpenGLContext;
class QWaylandCompositorPrivate;
class QWaylandClient;
class QWaylandSurface;
class QWaylandSeat;
class QWaylandView;
class QWaylandPointer;
class QWaylandKeyboard;
class QWaylandTouch;
class QWaylandSurfaceGrabber;
class QWaylandBufferRef;

Q_WAYLANDCOMPOSITOR_EXPORT Q_DECLARE_LOGGING_CATEGORY(qLcWaylandCompositor)
Q_WAYLANDCOMPOSITOR_EXPORT Q_DECLARE_LOGGING_CATEGORY(qLcWaylandCompositorHardwareIntegration)
Q_DECLARE_LOGGING_CATEGORY(qLcWaylandCompositorInputMethods)
Q_DECLARE_LOGGING_CATEGORY(qLcWaylandCompositorTextInput)

class Q_WAYLANDCOMPOSITOR_EXPORT QWaylandCompositor : public QWaylandObject
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QWaylandCompositor)
    Q_PROPERTY(QByteArray socketName READ socketName WRITE setSocketName NOTIFY socketNameChanged)
    Q_PROPERTY(bool created READ isCreated NOTIFY createdChanged)
    Q_PROPERTY(bool retainedSelection READ retainedSelectionEnabled WRITE setRetainedSelectionEnabled NOTIFY retainedSelectionChanged)
    Q_PROPERTY(QWaylandOutput *defaultOutput READ defaultOutput WRITE setDefaultOutput NOTIFY defaultOutputChanged)
    Q_PROPERTY(bool useHardwareIntegrationExtension READ useHardwareIntegrationExtension WRITE setUseHardwareIntegrationExtension NOTIFY useHardwareIntegrationExtensionChanged)
    Q_PROPERTY(QWaylandSeat *defaultSeat READ defaultSeat NOTIFY defaultSeatChanged)
    Q_PROPERTY(QVector<ShmFormat> additionalShmFormats READ additionalShmFormats WRITE setAdditionalShmFormats NOTIFY additionalShmFormatsChanged REVISION(6, 0))
    Q_MOC_INCLUDE("qwaylandseat.h")
    QML_NAMED_ELEMENT(WaylandCompositorBase)
    QML_UNCREATABLE("Cannot create instance of WaylandCompositorBase, use WaylandCompositor instead")
    QML_ADDED_IN_VERSION(1, 0)
public:
    // Duplicates subset of supported values wl_shm_format enum
    enum ShmFormat {
        ShmFormat_ARGB8888 = 0,
        ShmFormat_XRGB8888 = 1,
        ShmFormat_C8 = 0x20203843,
        ShmFormat_XRGB4444 = 0x32315258,
        ShmFormat_ARGB4444 = 0x32315241,
        ShmFormat_XRGB1555 = 0x35315258,
        ShmFormat_RGB565 = 0x36314752,
        ShmFormat_RGB888 = 0x34324752,
        ShmFormat_XBGR8888 = 0x34324258,
        ShmFormat_ABGR8888 = 0x34324241,
        ShmFormat_BGR888 = 0x34324742,
        ShmFormat_XRGB2101010 = 0x30335258,
        ShmFormat_XBGR2101010 = 0x30334258,
        ShmFormat_ARGB2101010 = 0x30335241,
        ShmFormat_ABGR2101010 = 0x30334241
    };
    Q_ENUM(ShmFormat)

    QWaylandCompositor(QObject *parent = nullptr);
    ~QWaylandCompositor() override;

    virtual void create();
    bool isCreated() const;

    void setSocketName(const QByteArray &name);
    QByteArray socketName() const;

    Q_INVOKABLE void addSocketDescriptor(int fd);

    ::wl_display *display() const;
    uint32_t nextSerial();

    QList<QWaylandClient *>clients() const;
    Q_INVOKABLE void destroyClientForSurface(QWaylandSurface *surface);
    Q_INVOKABLE void destroyClient(QWaylandClient *client);

    QList<QWaylandSurface *> surfaces() const;
    QList<QWaylandSurface *> surfacesForClient(QWaylandClient* client) const;

    Q_INVOKABLE QWaylandOutput *outputFor(QWindow *window) const;

    QWaylandOutput *defaultOutput() const;
    void setDefaultOutput(QWaylandOutput *output);
    QList<QWaylandOutput *> outputs() const;

    uint currentTimeMsecs() const;

    void setRetainedSelectionEnabled(bool enabled);
    bool retainedSelectionEnabled() const;
    void overrideSelection(const QMimeData *data);

    QWaylandSeat *defaultSeat() const;

    QWaylandSeat *seatFor(QInputEvent *inputEvent);

    bool useHardwareIntegrationExtension() const;
    void setUseHardwareIntegrationExtension(bool use);

    QVector<ShmFormat> additionalShmFormats() const;
    void setAdditionalShmFormats(const QVector<ShmFormat> &additionalShmFormats);

    virtual void grabSurface(QWaylandSurfaceGrabber *grabber, const QWaylandBufferRef &buffer);

public Q_SLOTS:
    void processWaylandEvents();

private Q_SLOTS:
    void applicationStateChanged(Qt::ApplicationState state);

Q_SIGNALS:
    void createdChanged();
    void socketNameChanged(const QByteArray &socketName);
    void retainedSelectionChanged(bool retainedSelection);

    void surfaceRequested(QWaylandClient *client, uint id, int version);
    void surfaceCreated(QWaylandSurface *surface);
    void surfaceAboutToBeDestroyed(QWaylandSurface *surface);
    void subsurfaceChanged(QWaylandSurface *child, QWaylandSurface *parent);

    void defaultOutputChanged();
    void defaultSeatChanged(QWaylandSeat *newDevice, QWaylandSeat *oldDevice);

    void useHardwareIntegrationExtensionChanged();

    void outputAdded(QWaylandOutput *output);
    void outputRemoved(QWaylandOutput *output);

    void additionalShmFormatsChanged();

protected:
    virtual void retainedSelectionReceived(QMimeData *mimeData);
    virtual QWaylandSeat *createSeat();
    virtual QWaylandPointer *createPointerDevice(QWaylandSeat *seat);
    virtual QWaylandKeyboard *createKeyboardDevice(QWaylandSeat *seat);
    virtual QWaylandTouch *createTouchDevice(QWaylandSeat *seat);

    QWaylandCompositor(QWaylandCompositorPrivate &dptr, QObject *parent = nullptr);
};

QT_END_NAMESPACE

#endif // QWAYLANDCOMPOSITOR_H