wayland_server.cpp 10.4 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
/********************************************************************
 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"
21
#include "abstract_backend.h"
22
#include "composite.h"
23
#include "screens.h"
24
#include "shell_client.h"
25
#include "workspace.h"
26

27 28 29
// Client
#include <KWayland/Client/connection_thread.h>
#include <KWayland/Client/registry.h>
30
#include <KWayland/Client/surface.h>
31
// Server
32
#include <KWayland/Server/compositor_interface.h>
33
#include <KWayland/Server/datadevicemanager_interface.h>
34 35
#include <KWayland/Server/display.h>
#include <KWayland/Server/output_interface.h>
36
#include <KWayland/Server/seat_interface.h>
37 38
#include <KWayland/Server/shell_interface.h>

39 40 41
// Qt
#include <QWindow>

42 43 44 45
// system
#include <sys/types.h>
#include <sys/socket.h>

46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68
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();
69 70 71 72 73 74 75 76
    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;
            }
77 78 79 80
            if (surface->client() != xWaylandConnection()) {
                // setting surface is only relevat for Xwayland clients
                return;
            }
81 82 83 84 85 86 87 88
            auto check = [surface] (const Toplevel *t) {
                return t->surfaceId() == surface->id();
            };
            if (Toplevel *t = ws->findToplevel(check)) {
                t->setSurface(surface);
            }
        }
    );
89 90
    m_shell = m_display->createShell(m_display);
    m_shell->create();
91 92
    connect(m_shell, &ShellInterface::surfaceCreated, this,
        [this] (ShellSurfaceInterface *surface) {
93 94 95 96
            if (!Workspace::self()) {
                // it's possible that a Surface gets created before Workspace is created
                return;
            }
97 98 99 100
            if (surface->client() == m_xwaylandConnection) {
                // skip Xwayland clients, those are created using standard X11 way
                return;
            }
101 102 103 104 105 106
            if (surface->client() == m_qtConnection) {
                // one of Qt's windows
                if (m_dummyWindowSurface && (m_dummyWindowSurface->id() == surface->surface()->id())) {
                    fakeDummyQtWindowInput();
                    return;
                }
107 108 109 110 111 112 113
                // 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();
                });
114
            }
115 116 117 118
            auto client = new ShellClient(surface);
            if (auto c = Compositor::self()) {
                connect(client, &Toplevel::needsRepaint, c, &Compositor::scheduleRepaint);
            }
119 120 121 122 123
            if (client->isInternal()) {
                m_internalClients << client;
            } else {
                m_clients << client;
            }
124 125 126
            emit shellClientAdded(client);
        }
    );
127
    m_display->createShm();
128 129
    m_seat = m_display->createSeat(m_display);
    m_seat->create();
130
    m_display->createDataDeviceManager(m_display)->create();
131
}
132

133 134
void WaylandServer::initOutputs()
{
135 136 137
    if (m_backend && m_backend->handlesOutputs()) {
        return;
    }
138 139 140 141
    Screens *s = screens();
    Q_ASSERT(s);
    for (int i = 0; i < s->count(); ++i) {
        OutputInterface *output = m_display->createOutput(m_display);
142
        output->setPhysicalSize(s->size(i) / 3.8);
143 144 145
        output->addMode(s->size(i));
        output->create();
    }
146 147
}

148 149 150 151 152 153 154 155
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]);
156 157 158 159 160
    connect(m_xwaylandConnection, &KWayland::Server::ClientConnection::disconnected, this,
        [] {
            qFatal("Xwayland Connection died");
        }
    );
161 162 163
    return sx[1];
}

164 165 166 167 168 169 170 171 172 173 174
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];
}

175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200
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();
}

201 202 203 204 205 206 207 208 209 210 211 212
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;
}

213 214 215
void WaylandServer::removeClient(ShellClient *c)
{
    m_clients.removeAll(c);
216
    m_internalClients.removeAll(c);
217 218 219
    emit shellClientRemoved(c);
}

220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252
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
}

253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268
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);
}

269
static ShellClient *findClientInList(const QList<ShellClient*> &clients, quint32 id)
270
{
271
    auto it = std::find_if(clients.begin(), clients.end(),
272 273 274 275
        [id] (ShellClient *c) {
            return c->windowId() == id;
        }
    );
276
    if (it == clients.end()) {
277 278 279 280 281
        return nullptr;
    }
    return *it;
}

282 283 284 285 286 287 288 289 290 291 292 293 294 295
ShellClient *WaylandServer::findClient(quint32 id) const
{
    if (id == 0) {
        return nullptr;
    }
    if (ShellClient *c = findClientInList(m_clients, id)) {
        return c;
    }
    if (ShellClient *c = findClientInList(m_internalClients, id)) {
        return c;
    }
    return nullptr;
}

296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337
quint32 WaylandServer::createWindowId(SurfaceInterface *surface)
{
    auto it = m_clientIds.constFind(surface->client());
    quint16 clientId = 0;
    if (it != m_clientIds.constEnd()) {
        clientId = it.value();
    } else {
        clientId = createClientId(surface->client());
    }
    Q_ASSERT(clientId != 0);
    quint32 id = clientId;
    // TODO: this does not prevent that two surfaces of same client get same id
    id = (id << 16) | (surface->id() & 0xFFFF);
    if (findClient(id)) {
        qCWarning(KWIN_CORE) << "Invalid client windowId generated:" << id;
        return 0;
    }
    return id;
}

quint16 WaylandServer::createClientId(ClientConnection *c)
{
    auto ids = m_clientIds.values().toSet();
    quint16 id = 1;
    if (!ids.isEmpty()) {
        for (quint16 i = ids.count() + 1; i >= 1 ; i--) {
            if (!ids.contains(i)) {
                id = i;
                break;
            }
        }
    }
    Q_ASSERT(!ids.contains(id));
    m_clientIds.insert(c, id);
    connect(c, &ClientConnection::disconnected, this,
        [this] (ClientConnection *c) {
            m_clientIds.remove(c);
        }
    );
    return id;
}

338
}