kwin/wayland_server.cpp

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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "wayland_server.h"
#include "abstract_backend.h"
#include "composite.h"
#include "screens.h"
#include "shell_client.h"
#include "workspace.h"
// Client
#include <KWayland/Client/connection_thread.h>
#include <KWayland/Client/registry.h>
#include <KWayland/Client/surface.h>
// Server
#include <KWayland/Server/compositor_interface.h>
#include <KWayland/Server/datadevicemanager_interface.h>
#include <KWayland/Server/display.h>
#include <KWayland/Server/output_interface.h>
#include <KWayland/Server/seat_interface.h>
#include <KWayland/Server/shell_interface.h>
// Qt
#include <QWindow>
// system
#include <sys/types.h>
#include <sys/socket.h>
using namespace KWayland::Server;
namespace KWin
{
KWIN_SINGLETON_FACTORY(WaylandServer)
WaylandServer::WaylandServer(QObject *parent)
: QObject(parent)
{
}
WaylandServer::~WaylandServer() = default;
void WaylandServer::init(const QByteArray &socketName)
{
m_display = new KWayland::Server::Display(this);
if (!socketName.isNull() && !socketName.isEmpty()) {
m_display->setSocketName(QString::fromUtf8(socketName));
}
m_display->start();
m_compositor = m_display->createCompositor(m_display);
m_compositor->create();
connect(m_compositor, &CompositorInterface::surfaceCreated, this,
[this] (SurfaceInterface *surface) {
// check whether we have a Toplevel with the Surface's id
Workspace *ws = Workspace::self();
if (!ws) {
// it's possible that a Surface gets created before Workspace is created
return;
}
if (surface->client() != xWaylandConnection()) {
// setting surface is only relevat for Xwayland clients
return;
}
auto check = [surface] (const Toplevel *t) {
return t->surfaceId() == surface->id();
};
if (Toplevel *t = ws->findToplevel(check)) {
t->setSurface(surface);
}
}
);
m_shell = m_display->createShell(m_display);
m_shell->create();
connect(m_shell, &ShellInterface::surfaceCreated, this,
[this] (ShellSurfaceInterface *surface) {
if (!Workspace::self()) {
// it's possible that a Surface gets created before Workspace is created
return;
}
if (surface->client() == m_xwaylandConnection) {
// skip Xwayland clients, those are created using standard X11 way
return;
}
if (surface->client() == m_qtConnection) {
// one of Qt's windows
if (m_dummyWindowSurface && (m_dummyWindowSurface->id() == surface->surface()->id())) {
fakeDummyQtWindowInput();
return;
}
// HACK: in order to get Qt to not block for frame rendered, we immediatelly emit the
// frameRendered once we get a new damage event.
auto s = surface->surface();
connect(s, &SurfaceInterface::damaged, this, [this, s] {
s->frameRendered(0);
m_qtConnection->flush();
});
}
auto client = new ShellClient(surface);
if (auto c = Compositor::self()) {
connect(client, &Toplevel::needsRepaint, c, &Compositor::scheduleRepaint);
}
m_clients << client;
emit shellClientAdded(client);
}
);
m_display->createShm();
m_seat = m_display->createSeat(m_display);
m_seat->create();
m_display->createDataDeviceManager(m_display)->create();
}
void WaylandServer::initOutputs()
{
if (m_backend && m_backend->handlesOutputs()) {
return;
}
Screens *s = screens();
Q_ASSERT(s);
for (int i = 0; i < s->count(); ++i) {
OutputInterface *output = m_display->createOutput(m_display);
output->setPhysicalSize(s->size(i) / 3.8);
output->addMode(s->size(i));
output->create();
}
}
int WaylandServer::createXWaylandConnection()
{
int sx[2];
if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, sx) < 0) {
qCWarning(KWIN_CORE) << "Could not create socket";
return -1;
}
m_xwaylandConnection = m_display->createClient(sx[0]);
connect(m_xwaylandConnection, &KWayland::Server::ClientConnection::disconnected, this,
[] {
qFatal("Xwayland Connection died");
}
);
return sx[1];
}
int WaylandServer::createQtConnection()
{
int sx[2];
if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, sx) < 0) {
qCWarning(KWIN_CORE) << "Could not create socket";
return -1;
}
m_qtConnection = m_display->createClient(sx[0]);
return sx[1];
}
void WaylandServer::createInternalConnection()
{
int sx[2];
if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0, sx) < 0) {
qCWarning(KWIN_CORE) << "Could not create socket";
return;
}
m_internalConnection.server = m_display->createClient(sx[0]);
using namespace KWayland::Client;
m_internalConnection.client = new ConnectionThread(this);
m_internalConnection.client->setSocketFd(sx[1]);
connect(m_internalConnection.client, &ConnectionThread::connected, this,
[this] {
Registry *registry = new Registry(m_internalConnection.client);
registry->create(m_internalConnection.client);
connect(registry, &Registry::shmAnnounced, this,
[this, registry] (quint32 name, quint32 version) {
m_internalConnection.shm = registry->createShmPool(name, version, m_internalConnection.client);
}
);
registry->setup();
}
);
m_internalConnection.client->initConnection();
}
void WaylandServer::installBackend(AbstractBackend *backend)
{
Q_ASSERT(!m_backend);
m_backend = backend;
}
void WaylandServer::uninstallBackend(AbstractBackend *backend)
{
Q_ASSERT(m_backend == backend);
m_backend = nullptr;
}
void WaylandServer::removeClient(ShellClient *c)
{
m_clients.removeAll(c);
emit shellClientRemoved(c);
}
void WaylandServer::createDummyQtWindow()
{
if (m_dummyWindow) {
return;
}
m_dummyWindow.reset(new QWindow());
m_dummyWindow->setSurfaceType(QSurface::RasterSurface);
m_dummyWindow->show();
m_dummyWindowSurface = KWayland::Client::Surface::fromWindow(m_dummyWindow.data());
}
void WaylandServer::fakeDummyQtWindowInput()
{
#if (QT_VERSION >= QT_VERSION_CHECK(5, 5, 0))
// we need to fake Qt into believing it has got any seat events
// this is done only when receiving either a key press or button.
// we simulate by sending a button press and release
auto surface = KWayland::Server::SurfaceInterface::get(m_dummyWindowSurface->id(), m_qtConnection);
if (!surface) {
return;
}
const auto oldSeatSurface = m_seat->focusedPointerSurface();
const auto oldPos = m_seat->focusedPointerSurfacePosition();
m_seat->setFocusedPointerSurface(surface, QPoint(0, 0));
m_seat->setPointerPos(QPointF(0, 0));
m_seat->pointerButtonPressed(Qt::LeftButton);
m_seat->pointerButtonReleased(Qt::LeftButton);
m_qtConnection->flush();
m_dummyWindow->hide();
m_seat->setFocusedPointerSurface(oldSeatSurface, oldPos);
#endif
}
void WaylandServer::dispatch()
{
if (!m_display) {
return;
}
if (!m_qtClientConnection) {
if (m_qtConnection && QGuiApplication::instance()) {
m_qtClientConnection = KWayland::Client::ConnectionThread::fromApplication(this);
}
}
if (m_qtClientConnection) {
m_qtClientConnection->flush();
}
m_display->dispatchEvents(0);
}
ShellClient *WaylandServer::findClient(quint32 id) const
{
if (id == 0) {
return nullptr;
}
auto it = std::find_if(m_clients.constBegin(), m_clients.constEnd(),
[id] (ShellClient *c) {
return c->windowId() == id;
}
);
if (it == m_clients.constEnd()) {
return nullptr;
}
return *it;
}
}