412 lines
12 KiB
C++
412 lines
12 KiB
C++
/********************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 1999, 2000 Matthias Ettrich <ettrich@kde.org>
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Copyright (C) 2003 Lubos Lunak <l.lunak@kde.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*********************************************************************/
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#include "main.h"
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#include <config-kwin.h>
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// kwin
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#include "atoms.h"
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#include "options.h"
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#include "sm.h"
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#include "workspace.h"
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// KDE
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#include <KAboutData>
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#include <KConfig>
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#include <KConfigGroup>
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#include <KCrash>
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#include <KLocalizedString>
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#include <KSharedConfig>
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// Qt
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#include <qplatformdefs.h>
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#include <QDebug>
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#include <QComboBox>
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#include <qcommandlineparser.h>
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#include <QDialog>
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#include <QDialogButtonBox>
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#include <QLabel>
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#include <QPushButton>
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#include <QQuickWindow>
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#include <QStandardPaths>
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#include <QVBoxLayout>
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#include <QtDBus/QtDBus>
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// system
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif // HAVE_UNISTD_H
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif // HAVE_MALLOC_H
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namespace KWin
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{
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Options* options;
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Atoms* atoms;
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int screen_number = -1;
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bool is_multihead = false;
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class AlternativeWMDialog : public QDialog
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{
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public:
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AlternativeWMDialog()
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: QDialog() {
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QWidget* mainWidget = new QWidget(this);
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QVBoxLayout* layout = new QVBoxLayout(mainWidget);
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QString text = i18n(
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"KWin is unstable.\n"
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"It seems to have crashed several times in a row.\n"
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"You can select another window manager to run:");
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QLabel* textLabel = new QLabel(text, mainWidget);
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layout->addWidget(textLabel);
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wmList = new QComboBox(mainWidget);
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wmList->setEditable(true);
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layout->addWidget(wmList);
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addWM(QStringLiteral("metacity"));
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addWM(QStringLiteral("openbox"));
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addWM(QStringLiteral("fvwm2"));
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addWM(QStringLiteral(KWIN_INTERNAL_NAME_X11));
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QVBoxLayout *mainLayout = new QVBoxLayout(this);
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mainLayout->addWidget(mainWidget);
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QDialogButtonBox *buttons = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel, this);
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buttons->button(QDialogButtonBox::Ok)->setDefault(true);
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connect(buttons, &QDialogButtonBox::accepted, this, &QDialog::accept);
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connect(buttons, &QDialogButtonBox::rejected, this, &QDialog::reject);
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mainLayout->addWidget(buttons);
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raise();
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}
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void addWM(const QString& wm) {
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// TODO: Check if WM is installed
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if (!QStandardPaths::findExecutable(wm).isEmpty())
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wmList->addItem(wm);
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}
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QString selectedWM() const {
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return wmList->currentText();
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}
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private:
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QComboBox* wmList;
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};
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int Application::crashes = 0;
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bool Application::isX11MultiHead()
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{
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return is_multihead;
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}
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void Application::setX11MultiHead(bool multiHead)
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{
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is_multihead = multiHead;
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}
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void Application::setX11ScreenNumber(int screenNumber)
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{
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screen_number = screenNumber;
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}
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int Application::x11ScreenNumber()
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{
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return screen_number;
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}
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Application::Application(Application::OperationMode mode, int &argc, char **argv)
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: QApplication(argc, argv)
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, m_eventFilter(new XcbEventFilter())
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, m_configLock(false)
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, m_operationMode(mode)
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{
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}
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void Application::setConfigLock(bool lock)
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{
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m_configLock = lock;
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}
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Application::OperationMode Application::operationMode() const
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{
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return m_operationMode;
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}
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void Application::setOperationMode(OperationMode mode)
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{
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m_operationMode = mode;
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}
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bool Application::shouldUseWaylandForCompositing() const
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{
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return m_operationMode == OperationModeWaylandAndX11;
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}
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bool Application::requiresCompositing() const
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{
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return shouldUseWaylandForCompositing();
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}
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void Application::start()
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{
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setQuitOnLastWindowClosed(false);
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KSharedConfig::Ptr config = KSharedConfig::openConfig();
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if (!config->isImmutable() && m_configLock) {
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// TODO: This shouldn't be necessary
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//config->setReadOnly( true );
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config->reparseConfiguration();
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}
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crashChecking();
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performStartup();
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}
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Application::~Application()
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{
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delete options;
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delete atoms;
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}
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void Application::crashChecking()
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{
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KCrash::setEmergencySaveFunction(Application::crashHandler);
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if (crashes >= 4) {
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// Something has gone seriously wrong
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AlternativeWMDialog dialog;
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QString cmd = QStringLiteral(KWIN_INTERNAL_NAME_X11);
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if (dialog.exec() == QDialog::Accepted)
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cmd = dialog.selectedWM();
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else
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::exit(1);
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if (cmd.length() > 500) {
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qDebug() << "Command is too long, truncating";
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cmd = cmd.left(500);
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}
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qDebug() << "Starting" << cmd << "and exiting";
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char buf[1024];
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sprintf(buf, "%s &", cmd.toAscii().data());
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system(buf);
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::exit(1);
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}
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if (crashes >= 2) {
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// Disable compositing if we have had too many crashes
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qDebug() << "Too many crashes recently, disabling compositing";
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KConfigGroup compgroup(KSharedConfig::openConfig(), "Compositing");
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compgroup.writeEntry("Enabled", false);
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}
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// Reset crashes count if we stay up for more that 15 seconds
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QTimer::singleShot(15 * 1000, this, SLOT(resetCrashesCount()));
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}
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bool Application::notify(QObject* o, QEvent* e)
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{
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if (Workspace::self()->workspaceEvent(e))
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return true;
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return QApplication::notify(o, e);
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}
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void Application::crashHandler(int signal)
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{
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crashes++;
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fprintf(stderr, "Application::crashHandler() called with signal %d; recent crashes: %d\n", signal, crashes);
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char cmd[1024];
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sprintf(cmd, "%s --crashes %d &",
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QFile::encodeName(QCoreApplication::applicationFilePath()).constData(), crashes);
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sleep(1);
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system(cmd);
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}
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void Application::resetCrashesCount()
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{
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crashes = 0;
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}
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void Application::setCrashCount(int count)
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{
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crashes = count;
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}
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bool Application::wasCrash()
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{
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return crashes > 0;
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}
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static const char description[] = I18N_NOOP("KDE window manager");
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void Application::createAboutData()
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{
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KAboutData aboutData(QStringLiteral(KWIN_NAME), // The program name used internally
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i18n("KWin"), // A displayable program name string
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QStringLiteral(KWIN_VERSION_STRING), // The program version string
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i18n(description), // Short description of what the app does
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KAboutLicense::GPL, // The license this code is released under
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i18n("(c) 1999-2013, The KDE Developers")); // Copyright Statement
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aboutData.addAuthor(i18n("Matthias Ettrich"), QString(), QStringLiteral("ettrich@kde.org"));
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aboutData.addAuthor(i18n("Cristian Tibirna"), QString(), QStringLiteral("tibirna@kde.org"));
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aboutData.addAuthor(i18n("Daniel M. Duley"), QString(), QStringLiteral("mosfet@kde.org"));
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aboutData.addAuthor(i18n("Luboš Luňák"), QString(), QStringLiteral("l.lunak@kde.org"));
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aboutData.addAuthor(i18n("Martin Gräßlin"), i18n("Maintainer"), QStringLiteral("mgraesslin@kde.org"));
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KAboutData::setApplicationData(aboutData);
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}
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static const QString s_lockOption = QStringLiteral("lock");
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static const QString s_crashesOption = QStringLiteral("crashes");
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void Application::setupCommandLine(QCommandLineParser *parser)
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{
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QCommandLineOption lockOption(s_lockOption, i18n("Disable configuration options"));
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QCommandLineOption crashesOption(s_crashesOption, i18n("Indicate that KWin has recently crashed n times"), QStringLiteral("n"));
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parser->setApplicationDescription(i18n("KDE window manager"));
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parser->addVersionOption();
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parser->addHelpOption();
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parser->addOption(lockOption);
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parser->addOption(crashesOption);
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KAboutData::applicationData().setupCommandLine(parser);
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}
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void Application::processCommandLine(QCommandLineParser *parser)
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{
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setConfigLock(parser->isSet(s_lockOption));
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Application::setCrashCount(parser->value(s_crashesOption).toInt());
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}
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void Application::registerDBusService()
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{
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QString appname;
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if (x11ScreenNumber() == 0)
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appname = QStringLiteral("org.kde.kwin");
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else
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appname.sprintf("org.kde.kwin-screen-%d", KWin::Application::x11ScreenNumber());
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QDBusConnection::sessionBus().interface()->registerService(
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appname, QDBusConnectionInterface::DontQueueService);
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}
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void Application::setupTranslator()
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{
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QTranslator qtTranslator;
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qtTranslator.load("qt_" + QLocale::system().name(),
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QLibraryInfo::location(QLibraryInfo::TranslationsPath));
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installTranslator(&qtTranslator);
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}
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void Application::setupMalloc()
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{
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#ifdef M_TRIM_THRESHOLD
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// Prevent fragmentation of the heap by malloc (glibc).
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//
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// The default threshold is 128*1024, which can result in a large memory usage
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// due to fragmentation especially if we use the raster graphicssystem. On the
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// otherside if the threshold is too low, free() starts to permanently ask the kernel
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// about shrinking the heap.
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#ifdef HAVE_UNISTD_H
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const int pagesize = sysconf(_SC_PAGESIZE);
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#else
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const int pagesize = 4*1024;
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#endif // HAVE_UNISTD_H
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mallopt(M_TRIM_THRESHOLD, 5*pagesize);
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#endif // M_TRIM_THRESHOLD
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}
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void Application::setupLocalizedString()
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{
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KLocalizedString::setApplicationDomain("kwin");
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}
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void Application::setupLoggingCategoryFilters()
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{
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QLoggingCategory::setFilterRules(QStringLiteral("aurorae.debug = true\n") +
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QStringLiteral("kwineffects.debug = true"));
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}
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void Application::notifyKSplash()
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{
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// Tell KSplash that KWin has started
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QDBusMessage ksplashProgressMessage = QDBusMessage::createMethodCall(QStringLiteral("org.kde.KSplash"),
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QStringLiteral("/KSplash"),
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QStringLiteral("org.kde.KSplash"),
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QStringLiteral("setStage"));
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ksplashProgressMessage.setArguments(QList<QVariant>() << QStringLiteral("wm"));
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QDBusConnection::sessionBus().asyncCall(ksplashProgressMessage);
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}
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void Application::createWorkspace()
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{
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// ensure the helper atoms are retrieved before we create the Workspace
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atoms->retrieveHelpers();
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// we want all QQuickWindows with an alpha buffer, do here as Workspace might create QQuickWindows
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QQuickWindow::setDefaultAlphaBuffer(true);
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// This tries to detect compositing options and can use GLX. GLX problems
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// (X errors) shouldn't cause kwin to abort, so this is out of the
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// critical startup section where x errors cause kwin to abort.
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// create workspace.
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(void) new Workspace(isSessionRestored());
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}
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void Application::createAtoms()
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{
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atoms = new Atoms;
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}
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void Application::createOptions()
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{
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options = new Options;
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}
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void Application::setupEventFilters()
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{
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installNativeEventFilter(m_eventFilter.data());
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}
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void Application::destroyWorkspace()
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{
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delete Workspace::self();
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}
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bool XcbEventFilter::nativeEventFilter(const QByteArray &eventType, void *message, long int *result)
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{
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Q_UNUSED(result)
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if (!Workspace::self()) {
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// Workspace not yet created
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return false;
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}
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if (eventType != "xcb_generic_event_t") {
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return false;
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}
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return Workspace::self()->workspaceEvent(static_cast<xcb_generic_event_t *>(message));
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}
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} // namespace
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#include "main.moc"
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