/****************************************************************************
Copyright 2017  David Edmundson <davidedmundson@kde.org>

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) version 3, or any
later version accepted by the membership of KDE e.V. (or its
successor approved by the membership of KDE e.V.), which shall
act as a proxy defined in Section 6 of version 3 of the license.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library.  If not, see <http://www.gnu.org/licenses/>.
****************************************************************************/
#include "xdgshell_stable_interface_p.h"
#include "xdgshell_interface_p.h"
#include "generic_shell_surface_p.h"
#include "display.h"
#include "global_p.h"
#include "global.h"
#include "resource_p.h"
#include "output_interface.h"
#include "seat_interface.h"
#include "surface_interface.h"

#include <wayland-xdg-shell-server-protocol.h>

namespace KWayland
{
namespace Server
{

class XdgShellStableInterface::Private : public XdgShellInterface::Private
{
public:
    Private(XdgShellStableInterface *q, Display *d);

    QVector<XdgSurfaceStableInterface*> surfaces;
    QVector<XdgPositionerStableInterface*> positioners;

private:

    void createSurface(wl_client *client, uint32_t version, uint32_t id, SurfaceInterface *surface, wl_resource *parentResource);
    void createPositioner(wl_client *client, uint32_t version, uint32_t id, wl_resource *parentResource);

    void bind(wl_client *client, uint32_t version, uint32_t id) override;

    quint32 ping(XdgShellSurfaceInterface * surface) override;

    static void unbind(wl_resource *resource);
    static Private *cast(wl_resource *r) {
        return static_cast<Private*>(wl_resource_get_user_data(r));
    }

    static void destroyCallback(wl_client *client, wl_resource *resource);
    static void createPositionerCallback(wl_client *client, wl_resource *resource, uint32_t id);
    static void getXdgSurfaceCallback(wl_client *client, wl_resource *resource, uint32_t id, wl_resource * surface);
    static void pongCallback(wl_client *client, wl_resource *resource, uint32_t serial);

    XdgShellStableInterface *q;
    static const struct xdg_wm_base_interface s_interface;
    static const quint32 s_version;
    QHash<wl_client *, wl_resource*> resources;
};

class XdgPopupStableInterface::Private : public XdgShellPopupInterface::Private
{
public:
    Private(XdgPopupStableInterface *q, XdgShellStableInterface *c, SurfaceInterface *surface, wl_resource *parentResource);
    ~Private() override;

    void ackConfigure(quint32 serial) {
        if (!configureSerials.contains(serial)) {
            return;
        }
        while (!configureSerials.isEmpty()) {
            quint32 i = configureSerials.takeFirst();
            emit q_func()->configureAcknowledged(i);
            if (i == serial) {
                break;
            }
        }
    }

    void popupDone() override;
    quint32 configure(const QRect &rect) override;

    XdgPopupStableInterface *q_func() {
        return static_cast<XdgPopupStableInterface *>(q);
    }
private:
    static void grabCallback(wl_client *client, wl_resource *resource, wl_resource *seat, uint32_t serial);

    static const struct xdg_popup_interface s_interface;
};

class XdgSurfaceStableInterface::Private : public KWayland::Server::Resource::Private
{
public:
    Private(XdgSurfaceStableInterface* q, XdgShellStableInterface* c, SurfaceInterface* surface, wl_resource* parentResource);

    ~Private() override;

    XdgSurfaceStableInterface *q_func() {
        return static_cast<XdgSurfaceStableInterface *>(q);
    }

    void createTopLevel(wl_client *client, uint32_t version, uint32_t id, wl_resource *parentResource);
    void createPopup(wl_client *client, uint32_t version, uint32_t id, wl_resource *parentResource, wl_resource *parentWindow, wl_resource *positioner);
    XdgShellStableInterface *m_shell;
    SurfaceInterface *m_surface;

    //effectively a union, only one of these should be populated.
    //a surface cannot have two roles
    QPointer<XdgTopLevelStableInterface> m_topLevel;
    QPointer<XdgPopupStableInterface> m_popup;

private:
    static void destroyCallback(wl_client *client, wl_resource *resource);
    static void getTopLevelCallback(wl_client *client, wl_resource *resource, uint32_t id);
    static void getPopupCallback(wl_client *client, wl_resource *resource, uint32_t id, wl_resource *parent, wl_resource *positioner);
    static void ackConfigureCallback(wl_client *client, wl_resource *resource, uint32_t serial);
    static void setWindowGeometryCallback(wl_client *client, wl_resource *resource, int32_t x, int32_t y, int32_t width, int32_t height);
    static const struct xdg_surface_interface s_interface;
};

class XdgTopLevelStableInterface::Private : public XdgShellSurfaceInterface::Private
{
public:
    Private(XdgTopLevelStableInterface* q, XdgShellStableInterface* c, SurfaceInterface* surface, wl_resource* parentResource);
    ~Private() override;

    void close() override;

    void ackConfigure(quint32 serial) {
        if (!configureSerials.contains(serial)) {
            return;
        }
        while (!configureSerials.isEmpty()) {
            quint32 i = configureSerials.takeFirst();
            emit q_func()->configureAcknowledged(i);
            if (i == serial) {
                break;
            }
        }
    }

    quint32 configure(States states, const QSize &size) override {
        if (!resource) {
            return 0;
        }
        const quint32 serial = global->display()->nextSerial();
        wl_array configureStates;
        wl_array_init(&configureStates);
        if (states.testFlag(State::Maximized)) {
            uint32_t *s = static_cast<uint32_t*>(wl_array_add(&configureStates, sizeof(uint32_t)));
            *s = XDG_TOPLEVEL_STATE_MAXIMIZED;
        }
        if (states.testFlag(State::Fullscreen)) {
            uint32_t *s = static_cast<uint32_t*>(wl_array_add(&configureStates, sizeof(uint32_t)));
            *s = XDG_TOPLEVEL_STATE_FULLSCREEN;
        }
        if (states.testFlag(State::Resizing)) {
            uint32_t *s = static_cast<uint32_t*>(wl_array_add(&configureStates, sizeof(uint32_t)));
            *s = XDG_TOPLEVEL_STATE_RESIZING;
        }
        if (states.testFlag(State::Activated)) {
            uint32_t *s = static_cast<uint32_t*>(wl_array_add(&configureStates, sizeof(uint32_t)));
            *s = XDG_TOPLEVEL_STATE_ACTIVATED;
        }
        configureSerials << serial;
        xdg_toplevel_send_configure(resource, size.width(), size.height(), &configureStates);

        xdg_surface_send_configure(parentResource, serial);

        client->flush();
        wl_array_release(&configureStates);
        return serial;
    };

    XdgTopLevelStableInterface *q_func() {
        return static_cast<XdgTopLevelStableInterface*>(q);
    }

private:
    static void destroyCallback(wl_client *client, wl_resource *resource);
    static void setParentCallback(struct wl_client *client, struct wl_resource *resource, wl_resource *parent);
    static void showWindowMenuCallback(wl_client *client, wl_resource *resource, wl_resource *seat, uint32_t serial, int32_t x, int32_t y);
    static void setMaxSizeCallback(wl_client *client, wl_resource *resource, int32_t width, int32_t height);
    static void setMinSizeCallback(wl_client *client, wl_resource *resource, int32_t width, int32_t height);
    static void setMaximizedCallback(wl_client *client, wl_resource *resource);
    static void unsetMaximizedCallback(wl_client *client, wl_resource *resource);
    static void setFullscreenCallback(wl_client *client, wl_resource *resource, wl_resource *output);
    static void unsetFullscreenCallback(wl_client *client, wl_resource *resource);
    static void setMinimizedCallback(wl_client *client, wl_resource *resource);

    static const struct xdg_toplevel_interface s_interface;
};


const quint32 XdgShellStableInterface::Private::s_version = 1;

#ifndef DOXYGEN_SHOULD_SKIP_THIS
const struct xdg_wm_base_interface XdgShellStableInterface::Private::s_interface = {
    destroyCallback,
    createPositionerCallback,
    getXdgSurfaceCallback,
    pongCallback
};
#endif

void XdgShellStableInterface::Private::destroyCallback(wl_client *client, wl_resource *resource)
{
    Q_UNUSED(client)
    auto s = cast(resource);
    if (!s->surfaces.isEmpty()) {
        wl_resource_post_error(resource, XDG_WM_BASE_ERROR_DEFUNCT_SURFACES, "WMBase destroyed before surfaces");
    }

    wl_resource_destroy(resource);
}

void XdgShellStableInterface::Private::createPositionerCallback(wl_client *client, wl_resource *resource, uint32_t id)
{
    auto s = cast(resource);
    s->createPositioner(client, wl_resource_get_version(resource), id, resource);
}

void XdgShellStableInterface::Private::getXdgSurfaceCallback(wl_client *client, wl_resource *resource, uint32_t id, wl_resource * surface)
{
    auto s = cast(resource);
    s->createSurface(client, wl_resource_get_version(resource), id, SurfaceInterface::get(surface), resource);
}

void XdgShellStableInterface::Private::createSurface(wl_client *client, uint32_t version, uint32_t id, SurfaceInterface *surface, wl_resource *parentResource)
{
    auto it = std::find_if(surfaces.constBegin(), surfaces.constEnd(),
        [surface](XdgSurfaceStableInterface *s) {
            return surface == s->surface();
        }
    );
    if (it != surfaces.constEnd()) {
        wl_resource_post_error(surface->resource(), XDG_WM_BASE_ERROR_ROLE, "XDG Surface already created");
        return;
    }
    XdgSurfaceStableInterface *shellSurface = new XdgSurfaceStableInterface(q, surface, parentResource);
    surfaces << shellSurface;
    QObject::connect(shellSurface, &XdgSurfaceStableInterface::destroyed, q,
        [this, shellSurface] {
            surfaces.removeAll(shellSurface);
        }
    );

    shellSurface->d->create(display->getConnection(client), version, id);
}

void XdgShellStableInterface::Private::createPositioner(wl_client *client, uint32_t version, uint32_t id, wl_resource *parentResource)
{
    Q_UNUSED(client)

    XdgPositionerStableInterface *positioner = new XdgPositionerStableInterface(q, parentResource);
    positioners << positioner;
    QObject::connect(positioner, &Resource::destroyed, q,
        [this, positioner] {
            positioners.removeAll(positioner);
        }
    );
    positioner->d->create(display->getConnection(client), version, id);
}

void XdgShellStableInterface::Private::pongCallback(wl_client *client, wl_resource *resource, uint32_t serial)
{
    Q_UNUSED(client)
    auto s = cast(resource);
    auto timerIt = s->pingTimers.find(serial);
    if (timerIt != s->pingTimers.end() && timerIt.value()->isActive()) {
        delete timerIt.value();
        s->pingTimers.erase(timerIt);
        emit s->q->pongReceived(serial);
    }
}

XdgShellStableInterface::Private::Private(XdgShellStableInterface *q, Display *d)
    : XdgShellInterface::Private(XdgShellInterfaceVersion::Stable, q, d, &xdg_wm_base_interface, 1)
    , q(q)
{
}

void XdgShellStableInterface::Private::bind(wl_client *client, uint32_t version, uint32_t id)
{
    auto c = display->getConnection(client);
    auto resource = c->createResource(&xdg_wm_base_interface, qMin(version, s_version), id);
    if (!resource) {
        wl_client_post_no_memory(client);
        return;
    }
    resources[client] = resource;
    wl_resource_set_implementation(resource, &s_interface, this, unbind);
}

void XdgShellStableInterface::Private::unbind(wl_resource *resource)
{
    auto s = cast(resource);
    auto client = wl_resource_get_client(resource);
    s->resources.remove(client);
}

XdgTopLevelStableInterface *XdgShellStableInterface::getSurface(wl_resource *resource)
{
    if (!resource) {
        return nullptr;
    }
    Q_D();

    for (auto it = d->surfaces.constBegin(); it != d->surfaces.constEnd() ; it++) {
        auto topLevel = (*it)->topLevel();
        if (topLevel && topLevel->resource() == resource) {
            return topLevel;
        }
    }
    return nullptr;
}

XdgSurfaceStableInterface *XdgShellStableInterface::realGetSurface(wl_resource *resource)
{
    if (!resource) {
        return nullptr;
    }
    Q_D();

    for (auto it = d->surfaces.constBegin(); it != d->surfaces.constEnd() ; it++) {
        if ((*it)->resource() == resource) {
            return (*it);
        }
    }
    return nullptr;
}

XdgPositionerStableInterface *XdgShellStableInterface::getPositioner(wl_resource *resource)
{
    if (!resource) {
        return nullptr;
    }
    Q_D();
    for (auto it = d->positioners.constBegin(); it != d->positioners.constEnd() ; it++) {
        if ((*it)->resource() == resource) {
            return *it;
        }
    }
    return nullptr;
}

quint32 XdgShellStableInterface::Private::ping(XdgShellSurfaceInterface *surface)
{
    auto client = surface->client()->client();
    //from here we can get the resource bound to our global.

    auto clientXdgShellResource = resources.value(client);
    if (!clientXdgShellResource) {
        return 0;
    }

    const quint32 pingSerial = display->nextSerial();
    xdg_wm_base_send_ping(clientXdgShellResource, pingSerial);

    setupTimer(pingSerial);
    return pingSerial;
}

XdgShellStableInterface::Private *XdgShellStableInterface::d_func() const
{
    return static_cast<Private*>(d.data());
}

namespace {
template <>
Qt::Edges edgesToQtEdges(xdg_toplevel_resize_edge edges)
{
    Qt::Edges qtEdges;
    switch (edges) {
    case XDG_TOPLEVEL_RESIZE_EDGE_TOP:
        qtEdges = Qt::TopEdge;
        break;
    case XDG_TOPLEVEL_RESIZE_EDGE_BOTTOM:
        qtEdges = Qt::BottomEdge;
        break;
    case XDG_TOPLEVEL_RESIZE_EDGE_LEFT:
        qtEdges = Qt::LeftEdge;
        break;
    case XDG_TOPLEVEL_RESIZE_EDGE_TOP_LEFT:
        qtEdges = Qt::TopEdge | Qt::LeftEdge;
        break;
    case XDG_TOPLEVEL_RESIZE_EDGE_BOTTOM_LEFT:
        qtEdges = Qt::BottomEdge | Qt::LeftEdge;
        break;
    case XDG_TOPLEVEL_RESIZE_EDGE_RIGHT:
        qtEdges = Qt::RightEdge;
        break;
    case XDG_TOPLEVEL_RESIZE_EDGE_TOP_RIGHT:
        qtEdges = Qt::TopEdge | Qt::RightEdge;
        break;
    case XDG_TOPLEVEL_RESIZE_EDGE_BOTTOM_RIGHT:
        qtEdges = Qt::BottomEdge | Qt::RightEdge;
        break;
    case XDG_TOPLEVEL_RESIZE_EDGE_NONE:
        break;
    default:
        Q_UNREACHABLE();
        break;
    }
    return qtEdges;
}
}

#ifndef DOXYGEN_SHOULD_SKIP_THIS
const struct xdg_surface_interface XdgSurfaceStableInterface::Private::s_interface = {
    destroyCallback,
    getTopLevelCallback,
    getPopupCallback,
    setWindowGeometryCallback,
    ackConfigureCallback
};
#endif

void XdgSurfaceStableInterface::Private::destroyCallback(wl_client *client, wl_resource *resource)
{
    Q_UNUSED(client)
    wl_resource_destroy(resource);
}

void XdgSurfaceStableInterface::Private::getTopLevelCallback(wl_client *client, wl_resource *resource, uint32_t id)
{
    auto s = cast<XdgSurfaceStableInterface::Private>(resource);
    s->createTopLevel(client, wl_resource_get_version(resource), id, resource);
}

void XdgSurfaceStableInterface::Private::createTopLevel(wl_client *client, uint32_t version, uint32_t id, wl_resource *parentResource)
{
    if (m_topLevel) {
        wl_resource_post_error(parentResource, XDG_SURFACE_ERROR_ALREADY_CONSTRUCTED, "Toplevel already created on this surface");
        return;
    }
    if (m_popup) {
        wl_resource_post_error(parentResource, XDG_SURFACE_ERROR_ALREADY_CONSTRUCTED, "Popup already created on this surface");
        return;
    }
    m_topLevel = new XdgTopLevelStableInterface (m_shell, m_surface, parentResource);
    m_topLevel->d->create(m_shell->display()->getConnection(client), version, id);

    emit m_shell->surfaceCreated(m_topLevel);
}


void XdgSurfaceStableInterface::Private::getPopupCallback(wl_client *client, wl_resource *resource, uint32_t id, wl_resource *parent, wl_resource *positioner)
{
    auto s = cast<XdgSurfaceStableInterface::Private>(resource);
    s->createPopup(client, wl_resource_get_version(resource), id, resource, parent, positioner);
}

void XdgSurfaceStableInterface::Private::createPopup(wl_client *client, uint32_t version, uint32_t id, wl_resource *parentResource, wl_resource *parentSurface, wl_resource *positioner)
{

    if (m_topLevel) {
        wl_resource_post_error(parentResource, XDG_SURFACE_ERROR_ALREADY_CONSTRUCTED, "Toplevel already created on this surface");
        return;
    }
    if (m_popup) {
        wl_resource_post_error(parentResource, XDG_SURFACE_ERROR_ALREADY_CONSTRUCTED, "Popup already created on this surface");
        return;
    }

    auto xdgPositioner = m_shell->getPositioner(positioner);
    if (!xdgPositioner) {
        wl_resource_post_error(parentResource, XDG_WM_BASE_ERROR_INVALID_POSITIONER, "Invalid positioner");
        return;
    }
    m_popup = new XdgPopupStableInterface(m_shell, m_surface, parentResource);
    auto pd = m_popup->d_func();

    pd->create(m_shell->display()->getConnection(client), version, id);

    auto parentXdgSurface = m_shell->realGetSurface(parentSurface);
    if (!parentXdgSurface) {
        wl_resource_post_error(parentResource, XDG_WM_BASE_ERROR_INVALID_POPUP_PARENT, "Invalid popup parent");
        return;
    }
    pd->parent = parentXdgSurface->surface();
    pd->initialSize = xdgPositioner->initialSize();
    pd->anchorRect = xdgPositioner->anchorRect();
    pd->anchorEdge = xdgPositioner->anchorEdge();
    pd->gravity = xdgPositioner->gravity();
    pd->constraintAdjustments = xdgPositioner->constraintAdjustments();
    pd->anchorOffset = xdgPositioner->anchorOffset();

    emit m_shell->xdgPopupCreated(m_popup.data());
}


void XdgSurfaceStableInterface::Private::ackConfigureCallback(wl_client *client, wl_resource *resource, uint32_t serial)
{
    auto s = cast<Private>(resource);
    Q_ASSERT(client == *s->client);

    if (s->m_topLevel) {
        s->m_topLevel->d_func()->ackConfigure(serial);
    } else if (s->m_popup) {
        s->m_popup->d_func()->ackConfigure(serial);
    }
}

void XdgSurfaceStableInterface::Private::setWindowGeometryCallback(wl_client *client, wl_resource *resource, int32_t x, int32_t y, int32_t width, int32_t height)
{
    auto s = cast<Private>(resource);
    Q_ASSERT(client == *s->client);

    const QRect windowRect(x, y, width, height);

    if (s->m_topLevel) {
        s->m_topLevel->d_func()->windowGeometry = windowRect;
        emit s->m_topLevel->windowGeometryChanged(windowRect);
    } else if (s->m_popup) {
        s->m_popup->d_func()->windowGeometry = windowRect;
        emit s->m_popup->windowGeometryChanged(windowRect);
    }
}

XdgSurfaceStableInterface::Private::Private(XdgSurfaceStableInterface *q, XdgShellStableInterface *c, SurfaceInterface *surface, wl_resource *parentResource)
    : KWayland::Server::Resource::Private(q, c, parentResource, &xdg_surface_interface, &s_interface),
    m_shell(c),
    m_surface(surface)
{
}

XdgSurfaceStableInterface::Private::~Private() = default;


class XdgPositionerStableInterface::Private : public KWayland::Server::Resource::Private
{
public:
    Private(XdgPositionerStableInterface *q,  XdgShellStableInterface *c, wl_resource* parentResource);

    QSize initialSize;
    QRect anchorRect;
    Qt::Edges anchorEdge;
    Qt::Edges gravity;
    PositionerConstraints constraintAdjustments;
    QPoint anchorOffset;

private:
    static void setSizeCallback(wl_client *client, wl_resource *resource, int32_t width, int32_t height);
    static void setAnchorRectCallback(wl_client *client, wl_resource *resource, int32_t x, int32_t y, int32_t width, int32_t height);
    static void setAnchorCallback(wl_client *client, wl_resource *resource, uint32_t anchor);
    static void setGravityCallback(wl_client *client, wl_resource *resource, uint32_t gravity);
    static void setConstraintAdjustmentCallback(wl_client *client, wl_resource *resource, uint32_t constraint_adjustment);
    static void setOffsetCallback(wl_client *client, wl_resource *resource, int32_t x, int32_t y);

    static const struct xdg_positioner_interface s_interface;
};

XdgPositionerStableInterface::Private::Private(XdgPositionerStableInterface *q, XdgShellStableInterface *c, wl_resource *parentResource)
    : KWayland::Server::Resource::Private(q, c, parentResource, &xdg_positioner_interface, &s_interface)
{
}

#ifndef DOXYGEN_SHOULD_SKIP_THIS
const struct xdg_positioner_interface XdgPositionerStableInterface::Private::s_interface = {
    resourceDestroyedCallback,
    setSizeCallback,
    setAnchorRectCallback,
    setAnchorCallback,
    setGravityCallback,
    setConstraintAdjustmentCallback,
    setOffsetCallback
};
#endif


void XdgPositionerStableInterface::Private::setSizeCallback(wl_client *client, wl_resource *resource, int32_t width, int32_t height) {
    Q_UNUSED(client)
    auto s = cast<Private>(resource);
    s->initialSize = QSize(width, height);
}

void XdgPositionerStableInterface::Private::setAnchorRectCallback(wl_client *client, wl_resource *resource, int32_t x, int32_t y, int32_t width, int32_t height)
{
    Q_UNUSED(client)
    auto s = cast<Private>(resource);
    s->anchorRect = QRect(x, y, width, height);
}

void XdgPositionerStableInterface::Private::setAnchorCallback(wl_client *client, wl_resource *resource, uint32_t anchor) {
    Q_UNUSED(client)

    auto s = cast<Private>(resource);

    Qt::Edges qtEdges;
    switch (anchor) {
    case XDG_POSITIONER_ANCHOR_TOP:
        qtEdges = Qt::TopEdge;
        break;
    case XDG_POSITIONER_ANCHOR_BOTTOM:
        qtEdges = Qt::BottomEdge;
        break;
    case XDG_POSITIONER_ANCHOR_LEFT:
        qtEdges = Qt::LeftEdge;
        break;
    case XDG_POSITIONER_ANCHOR_TOP_LEFT:
        qtEdges = Qt::TopEdge | Qt::LeftEdge;
        break;
    case XDG_POSITIONER_ANCHOR_BOTTOM_LEFT:
        qtEdges = Qt::BottomEdge | Qt::LeftEdge;
        break;
    case XDG_POSITIONER_ANCHOR_RIGHT:
        qtEdges = Qt::RightEdge;
        break;
    case XDG_POSITIONER_ANCHOR_TOP_RIGHT:
        qtEdges = Qt::TopEdge | Qt::RightEdge;
        break;
    case XDG_POSITIONER_ANCHOR_BOTTOM_RIGHT:
        qtEdges = Qt::BottomEdge | Qt::RightEdge;
        break;
    case XDG_POSITIONER_ANCHOR_NONE:
        break;
    default:
        Q_UNREACHABLE();
        break;
    }

    s->anchorEdge = qtEdges;
}

void XdgPositionerStableInterface::Private::setGravityCallback(wl_client *client, wl_resource *resource, uint32_t gravity) {
    Q_UNUSED(client)
    auto s = cast<Private>(resource);

    Qt::Edges qtEdges;
    switch (gravity) {
    case XDG_POSITIONER_GRAVITY_TOP:
        qtEdges = Qt::TopEdge;
        break;
    case XDG_POSITIONER_GRAVITY_BOTTOM:
        qtEdges = Qt::BottomEdge;
        break;
    case XDG_POSITIONER_GRAVITY_LEFT:
        qtEdges = Qt::LeftEdge;
        break;
    case XDG_POSITIONER_GRAVITY_TOP_LEFT:
        qtEdges = Qt::TopEdge | Qt::LeftEdge;
        break;
    case XDG_POSITIONER_GRAVITY_BOTTOM_LEFT:
        qtEdges = Qt::BottomEdge | Qt::LeftEdge;
        break;
    case XDG_POSITIONER_GRAVITY_RIGHT:
        qtEdges = Qt::RightEdge;
        break;
    case XDG_POSITIONER_GRAVITY_TOP_RIGHT:
        qtEdges = Qt::TopEdge | Qt::RightEdge;
        break;
    case XDG_POSITIONER_GRAVITY_BOTTOM_RIGHT:
        qtEdges = Qt::BottomEdge | Qt::RightEdge;
        break;
    case XDG_POSITIONER_GRAVITY_NONE:
        break;
    default:
        Q_UNREACHABLE();
        break;
    }

    s->gravity = qtEdges;
}

void XdgPositionerStableInterface::Private::setConstraintAdjustmentCallback(wl_client *client, wl_resource *resource, uint32_t constraint_adjustment) {
    Q_UNUSED(client)
    auto s = cast<Private>(resource);
    PositionerConstraints constraints;
    if (constraint_adjustment & XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_SLIDE_X) {
        constraints |= PositionerConstraint::SlideX;
    }
    if (constraint_adjustment & XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_SLIDE_Y) {
        constraints |= PositionerConstraint::SlideY;
    }
    if (constraint_adjustment & XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_FLIP_X) {
        constraints |= PositionerConstraint::FlipX;
    }
    if (constraint_adjustment & XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_FLIP_Y) {
        constraints |= PositionerConstraint::FlipY;
    }
    if (constraint_adjustment & XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_RESIZE_X) {
        constraints |= PositionerConstraint::ResizeX;
    }
    if (constraint_adjustment & XDG_POSITIONER_CONSTRAINT_ADJUSTMENT_RESIZE_Y) {
        constraints |= PositionerConstraint::ResizeY;
    }
    s->constraintAdjustments = constraints;
}

void XdgPositionerStableInterface::Private::setOffsetCallback(wl_client *client, wl_resource *resource, int32_t x, int32_t y)
{
    Q_UNUSED(client)
    auto s = cast<Private>(resource);
    s->anchorOffset = QPoint(x,y);
}

void XdgTopLevelStableInterface::Private::close()
{
    xdg_toplevel_send_close(resource);
    client->flush();
}

void XdgTopLevelStableInterface::Private::setMaxSizeCallback(wl_client *client, wl_resource *resource, int32_t width, int32_t height)
{
    auto s = cast<Private>(resource);
    Q_ASSERT(client == *s->client);
    s->q_func()->maxSizeChanged(QSize(width, height));
}

void XdgTopLevelStableInterface::Private::setMinSizeCallback(wl_client *client, wl_resource *resource, int32_t width, int32_t height)
{
    auto s = cast<Private>(resource);
    Q_ASSERT(client == *s->client);
    s->q_func()->minSizeChanged(QSize(width, height));
}

const struct xdg_toplevel_interface XdgTopLevelStableInterface::Private::s_interface = {
    destroyCallback,
    setParentCallback,
    setTitleCallback,
    setAppIdCallback,
    showWindowMenuCallback,
    moveCallback,
    resizeCallback<xdg_toplevel_resize_edge>,
    setMaxSizeCallback,
    setMinSizeCallback,
    setMaximizedCallback,
    unsetMaximizedCallback,
    setFullscreenCallback,
    unsetFullscreenCallback,
    setMinimizedCallback
};

void XdgTopLevelStableInterface::Private::destroyCallback(wl_client *client, wl_resource *resource)
{
    Q_UNUSED(client)
    wl_resource_destroy(resource);
}

void XdgTopLevelStableInterface::Private::setParentCallback(wl_client *client, wl_resource *resource, wl_resource *parent)
{
    auto s = cast<Private>(resource);
    Q_ASSERT(client == *s->client);
    if (!parent) {
        //setting null is valid API. Clear
        s->parent = nullptr;
        emit s->q_func()->transientForChanged();
    } else {
        auto parentSurface = static_cast<XdgShellStableInterface*>(s->q->global())->getSurface(parent);
        if (s->parent.data() != parentSurface) {
            s->parent = QPointer<XdgTopLevelStableInterface>(parentSurface);
            emit s->q_func()->transientForChanged();
        }
    }
}

void XdgTopLevelStableInterface::Private::showWindowMenuCallback(wl_client *client, wl_resource *resource, wl_resource *seat, uint32_t serial, int32_t x, int32_t y)
{
    auto s = cast<Private>(resource);
    Q_ASSERT(client == *s->client);
    emit s->q_func()->windowMenuRequested(SeatInterface::get(seat), serial, QPoint(x, y));
}

XdgTopLevelStableInterface::Private::Private(XdgTopLevelStableInterface *q, XdgShellStableInterface *c, SurfaceInterface *surface, wl_resource *parentResource)
    : XdgShellSurfaceInterface::Private(XdgShellInterfaceVersion::Stable, q, c, surface, parentResource, &xdg_toplevel_interface, &s_interface)
{
}

void XdgTopLevelStableInterface::Private::setMaximizedCallback(wl_client *client, wl_resource *resource)
{
    auto s = cast<Private>(resource);
    Q_ASSERT(client == *s->client);
    s->q_func()->maximizedChanged(true);
}

void XdgTopLevelStableInterface::Private::unsetMaximizedCallback(wl_client *client, wl_resource *resource)
{
    auto s = cast<Private>(resource);
    Q_ASSERT(client == *s->client);
    s->q_func()->maximizedChanged(false);
}

void XdgTopLevelStableInterface::Private::setFullscreenCallback(wl_client *client, wl_resource *resource, wl_resource *output)
{
    auto s = cast<Private>(resource);
    Q_ASSERT(client == *s->client);
    OutputInterface *o = nullptr;
    if (output) {
        o = OutputInterface::get(output);
    }
    s->q_func()->fullscreenChanged(true, o);
}

void XdgTopLevelStableInterface::Private::unsetFullscreenCallback(wl_client *client, wl_resource *resource)
{
    auto s = cast<Private>(resource);
    Q_ASSERT(client == *s->client);
    s->q_func()->fullscreenChanged(false, nullptr);
}

void XdgTopLevelStableInterface::Private::setMinimizedCallback(wl_client *client, wl_resource *resource)
{
    auto s = cast<Private>(resource);
    Q_ASSERT(client == *s->client);
    s->q_func()->minimizeRequested();
}

XdgTopLevelStableInterface::Private::~Private() = default;

#ifndef DOXYGEN_SHOULD_SKIP_THIS
const struct xdg_popup_interface XdgPopupStableInterface::Private::s_interface = {
    resourceDestroyedCallback,
    grabCallback
};
#endif

XdgPopupStableInterface::Private::Private(XdgPopupStableInterface *q, XdgShellStableInterface *c, SurfaceInterface *surface, wl_resource *parentResource)
    : XdgShellPopupInterface::Private(XdgShellInterfaceVersion::Stable, q, c, surface, parentResource, &xdg_popup_interface, &s_interface)
{
}

void XdgPopupStableInterface::Private::grabCallback(wl_client *client, wl_resource *resource, wl_resource *seat, uint32_t serial)
{
    Q_UNUSED(client)
    auto s = cast<Private>(resource);
    auto seatInterface = SeatInterface::get(seat);
    s->q_func()->grabRequested(seatInterface, serial);
}

XdgPopupStableInterface::Private::~Private() = default;

quint32 XdgPopupStableInterface::Private::configure(const QRect &rect)
{
    if (!resource) {
        return 0;
    }
    const quint32 serial = global->display()->nextSerial();
    configureSerials << serial;
    xdg_popup_send_configure(resource, rect.x(), rect.y(), rect.width(), rect.height());
    xdg_surface_send_configure(parentResource, serial);
    client->flush();

    return serial;
}

void XdgPopupStableInterface::Private::popupDone()
{
    if (!resource) {
        return;
    }
    // TODO: dismiss all child popups
    xdg_popup_send_popup_done(resource);
    client->flush();
}

XdgShellStableInterface::XdgShellStableInterface(Display *display, QObject *parent)
    : XdgShellInterface(new Private(this, display), parent)
{
}

Display* XdgShellStableInterface::display() const
{
    return d->display;
}

XdgShellStableInterface::~XdgShellStableInterface() = default;

XdgSurfaceStableInterface::XdgSurfaceStableInterface(XdgShellStableInterface *parent, SurfaceInterface *surface, wl_resource *parentResource)
    : KWayland::Server::Resource(new Private(this, parent, surface, parentResource))
{
}

XdgSurfaceStableInterface::~XdgSurfaceStableInterface() = default;

SurfaceInterface* XdgSurfaceStableInterface::surface() const
{
    Q_D();
    return d->m_surface;
}

XdgPositionerStableInterface::XdgPositionerStableInterface(XdgShellStableInterface *parent, wl_resource *parentResource)
    : KWayland::Server::Resource(new Private(this, parent, parentResource))
{
}

QSize XdgPositionerStableInterface::initialSize() const
{
    Q_D();
    return d->initialSize;
}

QRect XdgPositionerStableInterface::anchorRect() const
{
    Q_D();
    return d->anchorRect;
}

Qt::Edges XdgPositionerStableInterface::anchorEdge() const
{
    Q_D();
    return d->anchorEdge;
}

Qt::Edges XdgPositionerStableInterface::gravity() const
{
    Q_D();
    return d->gravity;
}

PositionerConstraints XdgPositionerStableInterface::constraintAdjustments() const
{
    Q_D();
    return d->constraintAdjustments;
}

QPoint XdgPositionerStableInterface::anchorOffset() const
{
    Q_D();
    return d->anchorOffset;
}


XdgPositionerStableInterface::Private *XdgPositionerStableInterface::d_func() const
{
    return static_cast<Private*>(d.data());
}


XdgTopLevelStableInterface* XdgSurfaceStableInterface::topLevel() const
{
    Q_D();
    return d->m_topLevel.data();
}

XdgPopupStableInterface* XdgSurfaceStableInterface::popup() const
{
    Q_D();
    return d->m_popup.data();
}

XdgSurfaceStableInterface::Private *XdgSurfaceStableInterface::d_func() const
{
    return static_cast<Private*>(d.data());
}


XdgTopLevelStableInterface::XdgTopLevelStableInterface(XdgShellStableInterface *parent, SurfaceInterface *surface, wl_resource *parentResource)
    : KWayland::Server::XdgShellSurfaceInterface(new Private(this, parent, surface, parentResource))
{
}

XdgTopLevelStableInterface::~XdgTopLevelStableInterface() = default;

XdgTopLevelStableInterface::Private *XdgTopLevelStableInterface::d_func() const
{
    return static_cast<Private*>(d.data());
}

XdgPopupStableInterface::XdgPopupStableInterface(XdgShellStableInterface *parent, SurfaceInterface *surface, wl_resource *parentResource)
    : XdgShellPopupInterface(new Private(this, parent, surface, parentResource))
{
}

XdgPopupStableInterface::~XdgPopupStableInterface() = default;

XdgPopupStableInterface::Private *XdgPopupStableInterface::d_func() const
{
    return static_cast<Private*>(d.data());
}

}
}

