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/*
SPDX-FileCopyrightText: 2014 Martin Gräßlin <mgraesslin@kde.org>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "waylandserver.h"
// Qt
#include <QAbstractEventDispatcher>
#include <QCoreApplication>
// ksld
#include "kscreenlocker_logging.h"
#include <config-kscreenlocker.h>
// Wayland
#include <wayland-ksld-server-protocol.h>
// system
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <unistd.h>
namespace ScreenLocker
{
WaylandServer::WaylandServer(QObject *parent)
: QObject(parent)
{
m_listener.server = this;
m_listener.listener.notify = [](wl_listener *listener, void *data) {
Q_UNUSED(data)
WaylandServer *server = reinterpret_cast<Listener *>(listener)->server;
server->m_greeter = nullptr;
};
}
WaylandServer::~WaylandServer()
{
stop();
}
int WaylandServer::start()
{
stop();
m_display = wl_display_create();
if (!m_display) {
return -1;
}
wl_event_loop *eventLoop = wl_display_get_event_loop(m_display);
const int fd = wl_event_loop_get_fd(eventLoop);
if (fd == -1) {
stop();
return -1;
}
m_notifier = new QSocketNotifier(fd, QSocketNotifier::Read);
connect(m_notifier, &QSocketNotifier::activated, this, &WaylandServer::dispatchEvents);
QAbstractEventDispatcher *eventDispatcher = QCoreApplication::eventDispatcher();
connect(eventDispatcher, &QAbstractEventDispatcher::aboutToBlock, this, &WaylandServer::flush);
int socketPair[2];
if (socketpair(AF_UNIX, SOCK_STREAM, 0, socketPair) == -1) {
// failed creating socket
stop();
return -1;
}
fcntl(socketPair[0], F_SETFD, FD_CLOEXEC);
m_greeter = wl_client_create(m_display, socketPair[0]);
if (!m_greeter) {
// failed creating the Wayland client
stop();
close(socketPair[0]);
close(socketPair[1]);
return -1;
}
wl_client_add_destroy_listener(m_greeter, &m_listener.listener);
m_interface = wl_global_create(m_display, &org_kde_ksld_interface, 3, this, bind);
return socketPair[1];
}
void WaylandServer::stop()
{
QAbstractEventDispatcher *eventDispatcher = QCoreApplication::eventDispatcher();
disconnect(eventDispatcher, &QAbstractEventDispatcher::aboutToBlock, this, &WaylandServer::flush);
delete m_notifier;
m_notifier = nullptr;
if (m_interface) {
wl_global_destroy(m_interface);
m_interface = nullptr;
}
if (m_greeter) {
wl_client_destroy(m_greeter);
m_greeter = nullptr;
}
if (m_display) {
wl_display_destroy(m_display);
m_display = nullptr;
}
}
void WaylandServer::flush()
{
wl_display_flush_clients(m_display);
}
void WaylandServer::dispatchEvents()
{
if (wl_event_loop_dispatch(wl_display_get_event_loop(m_display), 0) != 0) {
qCWarning(KSCREENLOCKER) << "Error on dispatching WaylandServer event loop";
}
}
void WaylandServer::bind(wl_client *client, void *data, uint32_t version, uint32_t id)
{
auto server = reinterpret_cast<WaylandServer *>(data);
if (client != server->m_greeter) {
// a proper error would be better
wl_client_post_no_memory(client);
return;
}
wl_resource *resource = wl_resource_create(server->m_greeter, &org_kde_ksld_interface, qMin(version, 1u), id);
if (!resource) {
wl_client_post_no_memory(client);
return;
}
static const struct org_kde_ksld_interface s_interface = {
.x11window =
[](wl_client *client, wl_resource *resource, uint32_t id) {
auto s = reinterpret_cast<WaylandServer *>(wl_resource_get_user_data(resource));
if (s->m_greeter == client) {
Q_EMIT s->x11WindowAdded(id);
}
},
};
wl_resource_set_implementation(resource, &s_interface, server, nullptr);
}
}
#include "moc_waylandserver.cpp"
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