486 lines
16 KiB
C++
486 lines
16 KiB
C++
/*
|
|
KWin - the KDE window manager
|
|
This file is part of the KDE project.
|
|
|
|
SPDX-FileCopyrightText: 1999, 2000 Matthias Ettrich <ettrich@kde.org>
|
|
SPDX-FileCopyrightText: 2003 Lubos Lunak <l.lunak@kde.org>
|
|
SPDX-FileCopyrightText: 2014 Martin Gräßlin <mgraesslin@kde.org>
|
|
|
|
SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
#include "main_x11.h"
|
|
|
|
#include <config-kwin.h>
|
|
|
|
#include "platform.h"
|
|
#include "sm.h"
|
|
#include "workspace.h"
|
|
#include "xcbutils.h"
|
|
|
|
#include <KConfigGroup>
|
|
#include <KCrash>
|
|
#include <KLocalizedString>
|
|
#include <KPluginLoader>
|
|
#include <KPluginMetaData>
|
|
#include <KSelectionOwner>
|
|
#include <KQuickAddons/QtQuickSettings>
|
|
|
|
#include <qplatformdefs.h>
|
|
#include <QComboBox>
|
|
#include <QCommandLineParser>
|
|
#include <QDialog>
|
|
#include <QDialogButtonBox>
|
|
#include <QFile>
|
|
#include <QLabel>
|
|
#include <QPushButton>
|
|
#include <QSurfaceFormat>
|
|
#include <QVBoxLayout>
|
|
#include <QX11Info>
|
|
#include <QtDBus>
|
|
|
|
// system
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif // HAVE_UNISTD_H
|
|
#include <iostream>
|
|
|
|
Q_LOGGING_CATEGORY(KWIN_CORE, "kwin_core", QtWarningMsg)
|
|
|
|
namespace KWin
|
|
{
|
|
|
|
static void sighandler(int)
|
|
{
|
|
QApplication::exit();
|
|
}
|
|
|
|
class AlternativeWMDialog : public QDialog
|
|
{
|
|
public:
|
|
AlternativeWMDialog()
|
|
: QDialog() {
|
|
QWidget* mainWidget = new QWidget(this);
|
|
QVBoxLayout* layout = new QVBoxLayout(mainWidget);
|
|
QString text = i18n(
|
|
"KWin is unstable.\n"
|
|
"It seems to have crashed several times in a row.\n"
|
|
"You can select another window manager to run:");
|
|
QLabel* textLabel = new QLabel(text, mainWidget);
|
|
layout->addWidget(textLabel);
|
|
wmList = new QComboBox(mainWidget);
|
|
wmList->setEditable(true);
|
|
layout->addWidget(wmList);
|
|
|
|
addWM(QStringLiteral("metacity"));
|
|
addWM(QStringLiteral("openbox"));
|
|
addWM(QStringLiteral("fvwm2"));
|
|
addWM(QStringLiteral(KWIN_INTERNAL_NAME_X11));
|
|
|
|
QVBoxLayout *mainLayout = new QVBoxLayout(this);
|
|
mainLayout->addWidget(mainWidget);
|
|
QDialogButtonBox *buttons = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel, this);
|
|
buttons->button(QDialogButtonBox::Ok)->setDefault(true);
|
|
connect(buttons, &QDialogButtonBox::accepted, this, &QDialog::accept);
|
|
connect(buttons, &QDialogButtonBox::rejected, this, &QDialog::reject);
|
|
mainLayout->addWidget(buttons);
|
|
|
|
raise();
|
|
}
|
|
|
|
void addWM(const QString& wm) {
|
|
// TODO: Check if WM is installed
|
|
if (!QStandardPaths::findExecutable(wm).isEmpty())
|
|
wmList->addItem(wm);
|
|
}
|
|
QString selectedWM() const {
|
|
return wmList->currentText();
|
|
}
|
|
|
|
private:
|
|
QComboBox* wmList;
|
|
};
|
|
|
|
class KWinSelectionOwner : public KSelectionOwner
|
|
{
|
|
Q_OBJECT
|
|
public:
|
|
explicit KWinSelectionOwner(int screen)
|
|
: KSelectionOwner(make_selection_atom(screen), screen)
|
|
{
|
|
}
|
|
|
|
private:
|
|
bool genericReply(xcb_atom_t target_P, xcb_atom_t property_P, xcb_window_t requestor_P) override {
|
|
if (target_P == xa_version) {
|
|
int32_t version[] = { 2, 0 };
|
|
xcb_change_property(connection(), XCB_PROP_MODE_REPLACE, requestor_P,
|
|
property_P, XCB_ATOM_INTEGER, 32, 2, version);
|
|
} else
|
|
return KSelectionOwner::genericReply(target_P, property_P, requestor_P);
|
|
return true;
|
|
}
|
|
|
|
void replyTargets(xcb_atom_t property_P, xcb_window_t requestor_P) override {
|
|
KSelectionOwner::replyTargets(property_P, requestor_P);
|
|
xcb_atom_t atoms[ 1 ] = { xa_version };
|
|
// PropModeAppend !
|
|
xcb_change_property(connection(), XCB_PROP_MODE_APPEND, requestor_P,
|
|
property_P, XCB_ATOM_ATOM, 32, 1, atoms);
|
|
}
|
|
|
|
void getAtoms() override {
|
|
KSelectionOwner::getAtoms();
|
|
if (xa_version == XCB_ATOM_NONE) {
|
|
const QByteArray name(QByteArrayLiteral("VERSION"));
|
|
ScopedCPointer<xcb_intern_atom_reply_t> atom(xcb_intern_atom_reply(
|
|
connection(),
|
|
xcb_intern_atom_unchecked(connection(), false, name.length(), name.constData()),
|
|
nullptr));
|
|
if (!atom.isNull()) {
|
|
xa_version = atom->atom;
|
|
}
|
|
}
|
|
}
|
|
|
|
xcb_atom_t make_selection_atom(int screen_P) {
|
|
if (screen_P < 0)
|
|
screen_P = QX11Info::appScreen();
|
|
QByteArray screen(QByteArrayLiteral("WM_S"));
|
|
screen.append(QByteArray::number(screen_P));
|
|
ScopedCPointer<xcb_intern_atom_reply_t> atom(xcb_intern_atom_reply(
|
|
connection(),
|
|
xcb_intern_atom_unchecked(connection(), false, screen.length(), screen.constData()),
|
|
nullptr));
|
|
if (atom.isNull()) {
|
|
return XCB_ATOM_NONE;
|
|
}
|
|
return atom->atom;
|
|
}
|
|
static xcb_atom_t xa_version;
|
|
};
|
|
xcb_atom_t KWinSelectionOwner::xa_version = XCB_ATOM_NONE;
|
|
|
|
//************************************
|
|
// ApplicationX11
|
|
//************************************
|
|
|
|
ApplicationX11::ApplicationX11(int &argc, char **argv)
|
|
: Application(OperationModeX11, argc, argv)
|
|
, owner()
|
|
, m_replace(false)
|
|
{
|
|
setX11Connection(QX11Info::connection());
|
|
setX11RootWindow(QX11Info::appRootWindow());
|
|
}
|
|
|
|
ApplicationX11::~ApplicationX11()
|
|
{
|
|
setTerminating();
|
|
destroyCompositor();
|
|
destroyWorkspace();
|
|
if (!owner.isNull() && owner->ownerWindow() != XCB_WINDOW_NONE) // If there was no --replace (no new WM)
|
|
Xcb::setInputFocus(XCB_INPUT_FOCUS_POINTER_ROOT);
|
|
}
|
|
|
|
void ApplicationX11::setReplace(bool replace)
|
|
{
|
|
m_replace = replace;
|
|
}
|
|
|
|
void ApplicationX11::lostSelection()
|
|
{
|
|
sendPostedEvents();
|
|
destroyCompositor();
|
|
destroyWorkspace();
|
|
// Remove windowmanager privileges
|
|
Xcb::selectInput(rootWindow(), XCB_EVENT_MASK_PROPERTY_CHANGE);
|
|
removeNativeX11EventFilter();
|
|
quit();
|
|
}
|
|
|
|
|
|
static xcb_screen_t *findXcbScreen(xcb_connection_t *connection, int screen)
|
|
{
|
|
for (xcb_screen_iterator_t it = xcb_setup_roots_iterator(xcb_get_setup(connection));
|
|
it.rem;
|
|
--screen, xcb_screen_next(&it)) {
|
|
if (screen == 0) {
|
|
return it.data;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void ApplicationX11::performStartup()
|
|
{
|
|
crashChecking();
|
|
|
|
if (Application::x11ScreenNumber() == -1) {
|
|
Application::setX11ScreenNumber(QX11Info::appScreen());
|
|
}
|
|
setX11DefaultScreen(findXcbScreen(x11Connection(), x11ScreenNumber()));
|
|
|
|
owner.reset(new KWinSelectionOwner(Application::x11ScreenNumber()));
|
|
connect(owner.data(), &KSelectionOwner::failedToClaimOwnership, []{
|
|
fputs(i18n("kwin: unable to claim manager selection, another wm running? (try using --replace)\n").toLocal8Bit().constData(), stderr);
|
|
::exit(1);
|
|
});
|
|
connect(owner.data(), &KSelectionOwner::lostOwnership, this, &ApplicationX11::lostSelection);
|
|
connect(owner.data(), &KSelectionOwner::claimedOwnership, [this]{
|
|
installNativeX11EventFilter();
|
|
// first load options - done internally by a different thread
|
|
createOptions();
|
|
|
|
if (!platform()->initialize()) {
|
|
std::exit(1);
|
|
}
|
|
|
|
createColorManager();
|
|
|
|
// Check whether another windowmanager is running
|
|
const uint32_t maskValues[] = {XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT};
|
|
ScopedCPointer<xcb_generic_error_t> redirectCheck(xcb_request_check(connection(),
|
|
xcb_change_window_attributes_checked(connection(),
|
|
rootWindow(),
|
|
XCB_CW_EVENT_MASK,
|
|
maskValues)));
|
|
if (!redirectCheck.isNull()) {
|
|
fputs(i18n("kwin: another window manager is running (try using --replace)\n").toLocal8Bit().constData(), stderr);
|
|
if (!wasCrash()) // if this is a crash-restart, DrKonqi may have stopped the process w/o killing the connection
|
|
::exit(1);
|
|
}
|
|
|
|
createInput();
|
|
createWorkspace();
|
|
createPlugins();
|
|
|
|
Xcb::sync(); // Trigger possible errors, there's still a chance to abort
|
|
|
|
notifyKSplash();
|
|
notifyStarted();
|
|
});
|
|
// we need to do an XSync here, otherwise the QPA might crash us later on
|
|
Xcb::sync();
|
|
owner->claim(m_replace || wasCrash(), true);
|
|
|
|
createAtoms();
|
|
}
|
|
|
|
bool ApplicationX11::notify(QObject* o, QEvent* e)
|
|
{
|
|
if (e->spontaneous() && Workspace::self()->workspaceEvent(e))
|
|
return true;
|
|
return QApplication::notify(o, e);
|
|
}
|
|
|
|
void ApplicationX11::setupCrashHandler()
|
|
{
|
|
KCrash::setEmergencySaveFunction(ApplicationX11::crashHandler);
|
|
}
|
|
|
|
void ApplicationX11::crashChecking()
|
|
{
|
|
setupCrashHandler();
|
|
if (crashes >= 4) {
|
|
// Something has gone seriously wrong
|
|
AlternativeWMDialog dialog;
|
|
QString cmd = QStringLiteral(KWIN_INTERNAL_NAME_X11);
|
|
if (dialog.exec() == QDialog::Accepted)
|
|
cmd = dialog.selectedWM();
|
|
else
|
|
::exit(1);
|
|
if (cmd.length() > 500) {
|
|
qCDebug(KWIN_CORE) << "Command is too long, truncating";
|
|
cmd = cmd.left(500);
|
|
}
|
|
qCDebug(KWIN_CORE) << "Starting" << cmd << "and exiting";
|
|
char buf[1024];
|
|
sprintf(buf, "%s &", cmd.toLatin1().data());
|
|
system(buf);
|
|
::exit(1);
|
|
}
|
|
if (crashes >= 2) {
|
|
// Disable compositing if we have had too many crashes
|
|
qCDebug(KWIN_CORE) << "Too many crashes recently, disabling compositing";
|
|
KConfigGroup compgroup(KSharedConfig::openConfig(), "Compositing");
|
|
compgroup.writeEntry("Enabled", false);
|
|
}
|
|
// Reset crashes count if we stay up for more that 15 seconds
|
|
QTimer::singleShot(15 * 1000, this, &Application::resetCrashesCount);
|
|
}
|
|
|
|
void ApplicationX11::notifyKSplash()
|
|
{
|
|
// Tell KSplash that KWin has started
|
|
QDBusMessage ksplashProgressMessage = QDBusMessage::createMethodCall(QStringLiteral("org.kde.KSplash"),
|
|
QStringLiteral("/KSplash"),
|
|
QStringLiteral("org.kde.KSplash"),
|
|
QStringLiteral("setStage"));
|
|
ksplashProgressMessage.setArguments(QList<QVariant>() << QStringLiteral("wm"));
|
|
QDBusConnection::sessionBus().asyncCall(ksplashProgressMessage);
|
|
}
|
|
|
|
void ApplicationX11::crashHandler(int signal)
|
|
{
|
|
crashes++;
|
|
|
|
fprintf(stderr, "Application::crashHandler() called with signal %d; recent crashes: %d\n", signal, crashes);
|
|
char cmd[1024];
|
|
sprintf(cmd, "%s --crashes %d &",
|
|
QFile::encodeName(QCoreApplication::applicationFilePath()).constData(), crashes);
|
|
|
|
sleep(1);
|
|
system(cmd);
|
|
}
|
|
|
|
} // namespace
|
|
|
|
int main(int argc, char * argv[])
|
|
{
|
|
KWin::Application::setupMalloc();
|
|
KWin::Application::setupLocalizedString();
|
|
|
|
int primaryScreen = 0;
|
|
xcb_connection_t *c = xcb_connect(nullptr, &primaryScreen);
|
|
if (!c || xcb_connection_has_error(c)) {
|
|
fprintf(stderr, "%s: FATAL ERROR while trying to open display %s\n",
|
|
argv[0], qgetenv("DISPLAY").constData());
|
|
exit(1);
|
|
}
|
|
|
|
const int number_of_screens = xcb_setup_roots_length(xcb_get_setup(c));
|
|
xcb_disconnect(c);
|
|
c = nullptr;
|
|
|
|
// multi head
|
|
auto isMultiHead = []() -> bool {
|
|
QByteArray multiHead = qgetenv("KDE_MULTIHEAD");
|
|
if (!multiHead.isEmpty()) {
|
|
return (multiHead.toLower() == "true");
|
|
}
|
|
return true;
|
|
};
|
|
if (number_of_screens != 1 && isMultiHead()) {
|
|
KWin::Application::setX11MultiHead(true);
|
|
KWin::Application::setX11ScreenNumber(primaryScreen);
|
|
int pos; // Temporarily needed to reconstruct DISPLAY var if multi-head
|
|
QByteArray display_name = qgetenv("DISPLAY");
|
|
|
|
if ((pos = display_name.lastIndexOf('.')) != -1)
|
|
display_name.remove(pos, 10); // 10 is enough to be sure we removed ".s"
|
|
|
|
for (int i = 0; i < number_of_screens; i++) {
|
|
// If execution doesn't pass by here, then kwin
|
|
// acts exactly as previously
|
|
if (i != KWin::Application::x11ScreenNumber() && fork() == 0) {
|
|
KWin::Application::setX11ScreenNumber(i);
|
|
QByteArray dBusSuffix = qgetenv("KWIN_DBUS_SERVICE_SUFFIX");
|
|
if (!dBusSuffix.isNull()) {
|
|
dBusSuffix.append(".");
|
|
}
|
|
dBusSuffix.append(QByteArrayLiteral("head-")).append(QByteArray::number(i));
|
|
qputenv("KWIN_DBUS_SERVICE_SUFFIX", dBusSuffix);
|
|
// Break here because we are the child process, we don't
|
|
// want to fork() anymore
|
|
break;
|
|
}
|
|
}
|
|
// In the next statement, display_name shouldn't contain a screen
|
|
// number. If it had it, it was removed at the "pos" check
|
|
const QString envir = QStringLiteral("DISPLAY=%1.%2")
|
|
.arg(display_name.data())
|
|
.arg(KWin::Application::x11ScreenNumber());
|
|
|
|
if (putenv(strdup(envir.toLatin1().constData()))) {
|
|
fprintf(stderr, "%s: WARNING: unable to set DISPLAY environment variable\n", argv[0]);
|
|
perror("putenv()");
|
|
}
|
|
}
|
|
|
|
if (signal(SIGTERM, KWin::sighandler) == SIG_IGN)
|
|
signal(SIGTERM, SIG_IGN);
|
|
if (signal(SIGINT, KWin::sighandler) == SIG_IGN)
|
|
signal(SIGINT, SIG_IGN);
|
|
if (signal(SIGHUP, KWin::sighandler) == SIG_IGN)
|
|
signal(SIGHUP, SIG_IGN);
|
|
signal(SIGPIPE, SIG_IGN);
|
|
|
|
// Disable the glib event loop integration, since it seems to be responsible
|
|
// for several bug reports about high CPU usage (bug #239963)
|
|
setenv("QT_NO_GLIB", "1", true);
|
|
|
|
// enforce xcb plugin, unfortunately command line switch has precedence
|
|
setenv("QT_QPA_PLATFORM", "xcb", true);
|
|
|
|
qunsetenv("QT_DEVICE_PIXEL_RATIO");
|
|
qunsetenv("QT_SCALE_FACTOR");
|
|
QCoreApplication::setAttribute(Qt::AA_DisableHighDpiScaling);
|
|
// KSMServer talks to us directly on DBus.
|
|
QCoreApplication::setAttribute(Qt::AA_DisableSessionManager);
|
|
// For sharing thumbnails between our scene graph and qtquick.
|
|
QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts);
|
|
|
|
QSurfaceFormat format = QSurfaceFormat::defaultFormat();
|
|
// shared opengl contexts must have the same reset notification policy
|
|
format.setOptions(QSurfaceFormat::ResetNotification);
|
|
// disables vsync for any QtQuick windows we create (BUG 406180)
|
|
format.setSwapInterval(0);
|
|
QSurfaceFormat::setDefaultFormat(format);
|
|
|
|
KWin::ApplicationX11 a(argc, argv);
|
|
a.setupTranslator();
|
|
|
|
KWin::Application::createAboutData();
|
|
KQuickAddons::QtQuickSettings::init();
|
|
|
|
QCommandLineOption replaceOption(QStringLiteral("replace"), i18n("Replace already-running ICCCM2.0-compliant window manager"));
|
|
|
|
QCommandLineParser parser;
|
|
a.setupCommandLine(&parser);
|
|
parser.addOption(replaceOption);
|
|
#ifdef KWIN_BUILD_ACTIVITIES
|
|
QCommandLineOption noActivitiesOption(QStringLiteral("no-kactivities"),
|
|
i18n("Disable KActivities integration."));
|
|
parser.addOption(noActivitiesOption);
|
|
#endif
|
|
|
|
parser.process(a);
|
|
a.processCommandLine(&parser);
|
|
a.setReplace(parser.isSet(replaceOption));
|
|
#ifdef KWIN_BUILD_ACTIVITIES
|
|
if (parser.isSet(noActivitiesOption)) {
|
|
a.setUseKActivities(false);
|
|
}
|
|
#endif
|
|
|
|
// perform sanity checks
|
|
if (a.platformName().toLower() != QStringLiteral("xcb")) {
|
|
fprintf(stderr, "%s: FATAL ERROR expecting platform xcb but got platform %s\n",
|
|
argv[0], qPrintable(a.platformName()));
|
|
exit(1);
|
|
}
|
|
if (!QX11Info::display()) {
|
|
fprintf(stderr, "%s: FATAL ERROR KWin requires Xlib support in the xcb plugin. Do not configure Qt with -no-xcb-xlib\n",
|
|
argv[0]);
|
|
exit(1);
|
|
}
|
|
|
|
// find and load the X11 platform plugin
|
|
const KPluginMetaData plugin = KPluginMetaData::findPluginById(QStringLiteral("org.kde.kwin.platforms"), QStringLiteral("KWinX11Platform"));
|
|
|
|
if (!plugin.isValid()) {
|
|
std::cerr << "FATAL ERROR: KWin could not find the KWinX11Platform plugin" << std::endl;
|
|
return 1;
|
|
}
|
|
a.initPlatform(plugin);
|
|
if (!a.platform()) {
|
|
std::cerr << "FATAL ERROR: could not instantiate the platform plugin" << std::endl;
|
|
return 1;
|
|
}
|
|
|
|
a.start();
|
|
|
|
return a.exec();
|
|
}
|
|
|
|
#include "main_x11.moc"
|