553 lines
19 KiB
C++
553 lines
19 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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#include "xcbutils.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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#include <QX11Info>
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// TODO: remove once QX11Info provides the X screen
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#include <X11/Xlib.h>
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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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//************************************
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// KWinSelectionOwner
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//************************************
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KWinSelectionOwner::KWinSelectionOwner(int screen_P)
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: KSelectionOwner(make_selection_atom(screen_P), screen_P)
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{
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}
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xcb_atom_t KWinSelectionOwner::make_selection_atom(int screen_P)
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{
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if (screen_P < 0)
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screen_P = QX11Info::appScreen();
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QByteArray screen(QByteArrayLiteral("WM_S"));
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screen.append(QByteArray::number(screen_P));
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ScopedCPointer<xcb_intern_atom_reply_t> atom(xcb_intern_atom_reply(
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connection(),
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xcb_intern_atom_unchecked(connection(), false, screen.length(), screen.constData()),
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nullptr));
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if (atom.isNull()) {
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return XCB_ATOM_NONE;
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}
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return atom->atom;
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}
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void KWinSelectionOwner::getAtoms()
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{
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KSelectionOwner::getAtoms();
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if (xa_version == XCB_ATOM_NONE) {
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const QByteArray name(QByteArrayLiteral("VERSION"));
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ScopedCPointer<xcb_intern_atom_reply_t> atom(xcb_intern_atom_reply(
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connection(),
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xcb_intern_atom_unchecked(connection(), false, name.length(), name.constData()),
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nullptr));
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if (!atom.isNull()) {
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xa_version = atom->atom;
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}
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}
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}
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void KWinSelectionOwner::replyTargets(xcb_atom_t property_P, xcb_window_t requestor_P)
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{
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KSelectionOwner::replyTargets(property_P, requestor_P);
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xcb_atom_t atoms[ 1 ] = { xa_version };
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// PropModeAppend !
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xcb_change_property(connection(), XCB_PROP_MODE_APPEND, requestor_P,
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property_P, XCB_ATOM_ATOM, 32, 1, atoms);
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}
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bool KWinSelectionOwner::genericReply(xcb_atom_t target_P, xcb_atom_t property_P, xcb_window_t requestor_P)
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{
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if (target_P == xa_version) {
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int32_t version[] = { 2, 0 };
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xcb_change_property(connection(), XCB_PROP_MODE_REPLACE, requestor_P,
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property_P, XCB_ATOM_INTEGER, 32, 2, version);
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} else
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return KSelectionOwner::genericReply(target_P, property_P, requestor_P);
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return true;
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}
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xcb_atom_t KWinSelectionOwner::xa_version = XCB_ATOM_NONE;
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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_NAME));
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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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Application::Application(int &argc, char **argv)
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: QApplication(argc, argv)
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, owner()
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, m_eventFilter(new XcbEventFilter())
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, m_replace(false)
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, m_configLock(false)
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, m_operationMode(OperationModeX11)
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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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void Application::setReplace(bool replace)
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{
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m_replace = replace;
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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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if (screen_number == -1)
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screen_number = QX11Info::appScreen();
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owner.reset(new KWinSelectionOwner(screen_number));
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connect(owner.data(), &KSelectionOwner::failedToClaimOwnership, []{
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fputs(i18n("kwin: unable to claim manager selection, another wm running? (try using --replace)\n").toLocal8Bit().constData(), stderr);
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::exit(1);
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});
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connect(owner.data(), SIGNAL(lostOwnership()), SLOT(lostSelection()));
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connect(owner.data(), &KSelectionOwner::claimedOwnership, [this]{
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// we want all QQuickWindows with an alpha buffer
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QQuickWindow::setDefaultAlphaBuffer(true);
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installNativeEventFilter(m_eventFilter.data());
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// first load options - done internally by a different thread
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options = new Options;
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// Check whether another windowmanager is running
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const uint32_t maskValues[] = {XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT};
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ScopedCPointer<xcb_generic_error_t> redirectCheck(xcb_request_check(connection(),
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xcb_change_window_attributes_checked(connection(),
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rootWindow(),
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XCB_CW_EVENT_MASK,
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maskValues)));
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if (!redirectCheck.isNull()) {
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fputs(i18n("kwin: another window manager is running (try using --replace)\n").toLocal8Bit().constData(), stderr);
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::exit(1);
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}
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atoms->retrieveHelpers();
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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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Xcb::sync(); // Trigger possible errors, there's still a chance to abort
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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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crashChecking();
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// we need to do an XSync here, otherwise the QPA might crash us later on
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Xcb::sync();
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owner->claim(m_replace, true);
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atoms = new Atoms;
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}
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Application::~Application()
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{
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delete Workspace::self();
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if (!owner.isNull() && owner->ownerWindow() != XCB_WINDOW_NONE) // If there was no --replace (no new WM)
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Xcb::setInputFocus(XCB_INPUT_FOCUS_POINTER_ROOT);
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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_NAME);
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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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void Application::lostSelection()
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{
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sendPostedEvents();
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delete Workspace::self();
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// Remove windowmanager privileges
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Xcb::selectInput(rootWindow(), XCB_EVENT_MASK_PROPERTY_CHANGE);
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quit();
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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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static void sighandler(int)
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{
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QApplication::exit();
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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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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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static const char version[] = KWIN_VERSION_STRING;
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static const char description[] = I18N_NOOP("KDE window manager");
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extern "C"
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KWIN_EXPORT int kdemain(int argc, char * argv[])
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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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KLocalizedString::setApplicationDomain("kwin");
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QLoggingCategory::setFilterRules(QStringLiteral("aurorae.debug = true\n") +
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QStringLiteral("kwineffects.debug = true"));
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int primaryScreen = 0;
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xcb_connection_t *c = xcb_connect(nullptr, &primaryScreen);
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if (!c || xcb_connection_has_error(c)) {
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fprintf(stderr, "%s: FATAL ERROR while trying to open display %s\n",
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argv[0], qgetenv("DISPLAY").constData());
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exit(1);
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}
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const int number_of_screens = xcb_setup_roots_length(xcb_get_setup(c));
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// multi head
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auto isMultiHead = []() -> bool {
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QByteArray multiHead = qgetenv("KDE_MULTIHEAD");
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if (!multiHead.isEmpty()) {
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return (multiHead.toLower() == "true");
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}
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return true;
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};
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if (number_of_screens != 1 && isMultiHead()) {
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KWin::is_multihead = true;
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KWin::screen_number = primaryScreen;
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int pos; // Temporarily needed to reconstruct DISPLAY var if multi-head
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QByteArray display_name = qgetenv("DISPLAY");
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xcb_disconnect(c);
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c = nullptr;
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if ((pos = display_name.lastIndexOf('.')) != -1)
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display_name.remove(pos, 10); // 10 is enough to be sure we removed ".s"
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QString envir;
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for (int i = 0; i < number_of_screens; i++) {
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// If execution doesn't pass by here, then kwin
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// acts exactly as previously
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if (i != KWin::screen_number && fork() == 0) {
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KWin::screen_number = i;
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// Break here because we are the child process, we don't
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// want to fork() anymore
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break;
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}
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}
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// In the next statement, display_name shouldn't contain a screen
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// number. If it had it, it was removed at the "pos" check
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envir.sprintf("DISPLAY=%s.%d", display_name.data(), KWin::screen_number);
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if (putenv(strdup(envir.toAscii().constData()))) {
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fprintf(stderr, "%s: WARNING: unable to set DISPLAY environment variable\n", argv[0]);
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perror("putenv()");
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}
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}
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if (signal(SIGTERM, KWin::sighandler) == SIG_IGN)
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signal(SIGTERM, SIG_IGN);
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if (signal(SIGINT, KWin::sighandler) == SIG_IGN)
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signal(SIGINT, SIG_IGN);
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if (signal(SIGHUP, KWin::sighandler) == SIG_IGN)
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signal(SIGHUP, SIG_IGN);
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// Disable the glib event loop integration, since it seems to be responsible
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// for several bug reports about high CPU usage (bug #239963)
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setenv("QT_NO_GLIB", "1", true);
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// enforce xcb plugin, unfortunately command line switch has precedence
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setenv("QT_QPA_PLATFORM", "xcb", true);
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KWin::Application a(argc, argv);
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a.setApplicationName(QStringLiteral(KWIN_NAME));
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a.setApplicationVersion(QStringLiteral(KWIN_VERSION_STRING));
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a.setApplicationDisplayName(i18n("KWin"));
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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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KAboutData::License_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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QCommandLineOption lockOption(QStringLiteral("lock"), i18n("Disable configuration options"));
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QCommandLineOption replaceOption(QStringLiteral("replace"), i18n("Replace already-running ICCCM2.0-compliant window manager"));
|
|
QCommandLineOption crashesOption(QStringLiteral("crashes"), i18n("Indicate that KWin has recently crashed n times"), QStringLiteral("n"));
|
|
|
|
QCommandLineParser parser;
|
|
parser.setApplicationDescription(i18n("KDE window manager"));
|
|
parser.addVersionOption();
|
|
parser.addHelpOption();
|
|
parser.addOption(lockOption);
|
|
parser.addOption(replaceOption);
|
|
parser.addOption(crashesOption);
|
|
|
|
parser.process(a);
|
|
|
|
KWin::Application::setCrashCount(parser.value(crashesOption).toInt());
|
|
a.setConfigLock(parser.isSet(lockOption));
|
|
a.setReplace(parser.isSet(replaceOption));
|
|
|
|
// 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 (!KWin::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);
|
|
}
|
|
|
|
a.start();
|
|
|
|
#warning SessionManager needs porting
|
|
#if KWIN_QT5_PORTING
|
|
KWin::SessionManager weAreIndeed;
|
|
#endif
|
|
KWin::SessionSaveDoneHelper helper;
|
|
|
|
QString appname;
|
|
if (KWin::screen_number == 0)
|
|
appname = QStringLiteral("org.kde.kwin");
|
|
else
|
|
appname.sprintf("org.kde.kwin-screen-%d", KWin::screen_number);
|
|
|
|
QDBusConnection::sessionBus().interface()->registerService(
|
|
appname, QDBusConnectionInterface::DontQueueService);
|
|
|
|
return a.exec();
|
|
}
|
|
|
|
#include "main.moc"
|