kde-workspace/ksmserver/shutdowndlg.cpp

/*****************************************************************
ksmserver - the KDE session management server

Copyright 2000 Matthias Ettrich <ettrich@kde.org>
Copyright 2007 Urs Wolfer <uwolfer @ kde.org>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

******************************************************************/

#include "shutdowndlg.h"
#include "kworkspace/kdisplaymanager.h"

#include <QX11Info>
#include <klocale.h>
#include <kwindowsystem.h>
#include <kdialog.h>

#include <X11/Xlib.h>
#include <X11/Xutil.h>

static const int s_timeout = 10; // 10secs
static const QSizeF s_iconsize = QSizeF(64, 64);
static const QSizeF s_chooseminumumsize = QSizeF(280, 130);
static const QSizeF s_nochooseminumumsize = QSizeF(280, 80);

static bool kSwitchTitleEvent(QEvent *event)
{
    switch (event->type()) {
        case QEvent::HoverEnter:
        case QEvent::GraphicsSceneHoverEnter: {
            return true;
        }
        default: {
            return false;
        }
    }
    Q_UNREACHABLE();
}

void KSMShutdownFeedback::start()
{
    if (KWindowSystem::compositingActive()) {
        // Announce that the user MAY be logging out (Intended for the compositor)
        Display* dpy = QX11Info::display();
        Atom announce = XInternAtom(dpy, "_KDE_LOGGING_OUT", False);
        unsigned char dummy = 0;
        XChangeProperty(dpy, QX11Info::appRootWindow(), announce, announce, 8, PropModeReplace, &dummy, 1);
    }
}

void KSMShutdownFeedback::stop()
{
    if (KWindowSystem::compositingActive()) {
        // No longer logging out, announce (Intended for the compositor)
        Display* dpy = QX11Info::display();
        Atom announce = XInternAtom(dpy, "_KDE_LOGGING_OUT", False);
        XDeleteProperty(QX11Info::display(), QX11Info::appRootWindow(), announce);
    }
}

KSMShutdownDlg::KSMShutdownDlg(QWidget* parent,
                               bool maysd, bool choose, KWorkSpace::ShutdownType sdtype)
    : Plasma::Dialog(parent, Qt::Dialog | Qt::WindowStaysOnTopHint),
    m_scene(nullptr),
    m_widget(nullptr),
    m_layout(nullptr),
    m_titlelabel(nullptr),
    m_separator(nullptr),
    m_logoutwidget(nullptr),
    m_rebootwidget(nullptr),
    m_haltwidget(nullptr),
    m_okbutton(nullptr),
    m_cancelbutton(nullptr),
    m_eventloop(nullptr),
    m_timer(nullptr),
    m_second(s_timeout),
    m_shutdownType(sdtype)
{
    // make the screen gray
    KSMShutdownFeedback::start();

    m_scene = new QGraphicsScene(this);
    m_widget = new QGraphicsWidget();

    m_layout = new QGraphicsGridLayout(m_widget);
    m_layout->setContentsMargins(0, 0, 0, 0);
    m_layout->setSpacing(4);

    if (!choose) {
        m_widget->setMinimumSize(s_nochooseminumumsize);

        m_titlelabel = new Plasma::Label(m_widget);
        m_titlelabel->setAlignment(Qt::AlignCenter);
        m_titlelabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
        m_layout->addItem(m_titlelabel, 0, 0, 1, 2);

        switch (m_shutdownType) {
            case KWorkSpace::ShutdownTypeReboot: {
                m_titlelabel->setText(
                    i18np("Restarting computer in 1 second.", "Restarting computer in %1 seconds.", m_second)
                );
                break;
            }
            case KWorkSpace::ShutdownTypeHalt: {
                m_titlelabel->setText(
                    i18np("Turning off computer in 1 second.", "Turning off computer in %1 seconds.", m_second)
                );
                break;
            }
            default: {
                m_titlelabel->setText(
                    i18np("Logging out in 1 second.", "Logging out in %1 seconds.", m_second)
                );
                break;
            }
        }

        m_okbutton = new Plasma::PushButton(m_widget);
        m_okbutton->setText(i18n("&OK"));
        m_okbutton->setIcon(KIcon("dialog-ok"));
        m_okbutton->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred);
        m_okbutton->installEventFilter(this);
        connect(
            m_okbutton, SIGNAL(released()),
            this, SLOT(slotOk())
        );
        m_layout->addItem(m_okbutton, 1, 0, 1, 1);

        m_cancelbutton = new Plasma::PushButton(m_widget);
        m_cancelbutton->setText(i18n("&Cancel"));
        m_cancelbutton->setIcon(KIcon("dialog-cancel"));
        m_cancelbutton->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred);
        m_cancelbutton->installEventFilter(this);
        connect(
            m_cancelbutton, SIGNAL(released()),
            this, SLOT(slotCancel())
        );
        m_layout->addItem(m_cancelbutton, 1, 1, 1, 1);
        m_layout->setRowMaximumHeight(1, m_cancelbutton->preferredSize().height() + m_layout->verticalSpacing());

        slotTimeout();
        m_timer = new QTimer(this);
        m_timer->setInterval(1000);
        connect(
            m_timer, SIGNAL(timeout()),
            this, SLOT(slotTimeout())
        );
        m_timer->start();
    } else {
        m_widget->setMinimumSize(s_chooseminumumsize);

        int buttonscount = 0;

        m_titlelabel = new Plasma::Label(m_widget);
        m_titlelabel->setAlignment(Qt::AlignCenter);
        m_titlelabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
        m_titlelabel->setText(i18n("Choose"));
        m_separator = new Plasma::Separator(m_widget);

        m_logoutwidget = new Plasma::IconWidget(m_widget);
        m_logoutwidget->setPreferredIconSize(s_iconsize);
        m_logoutwidget->setIcon(KIcon("system-log-out"));
        m_logoutwidget->installEventFilter(this);
        connect(
            m_logoutwidget, SIGNAL(clicked()),
            this, SLOT(slotLogout())
        );
        m_layout->addItem(m_logoutwidget, 2, buttonscount);
        buttonscount++;

        if (maysd) {
            m_rebootwidget = new Plasma::IconWidget(m_widget);
            m_rebootwidget->setPreferredIconSize(s_iconsize);
            m_rebootwidget->setIcon(KIcon("system-reboot"));
            m_rebootwidget->installEventFilter(this);
            connect(
                m_rebootwidget, SIGNAL(clicked()),
                this, SLOT(slotReboot())
            );
            m_layout->addItem(m_rebootwidget, 2, buttonscount);
            buttonscount++;

            m_haltwidget = new Plasma::IconWidget(m_widget);
            m_haltwidget->setPreferredIconSize(s_iconsize);
            m_haltwidget->setIcon(KIcon("system-shutdown"));
            m_haltwidget->installEventFilter(this);
            connect(
                m_haltwidget, SIGNAL(clicked()),
                this, SLOT(slotHalt())
            );
            m_layout->addItem(m_haltwidget, 2, buttonscount);
            buttonscount++;
        }

        m_cancelbutton = new Plasma::PushButton(m_widget);
        m_cancelbutton->setText(i18n("&Cancel"));
        m_cancelbutton->setIcon(KIcon("dialog-cancel"));
        m_cancelbutton->installEventFilter(this);
        connect(
            m_cancelbutton, SIGNAL(released()),
            this, SLOT(slotCancel())
        );
        m_layout->addItem(m_cancelbutton, 3, 0, 1, buttonscount);
        m_layout->setRowMaximumHeight(3, m_cancelbutton->preferredSize().height() + m_layout->horizontalSpacing());

        m_layout->addItem(m_titlelabel, 0, 0, 1, buttonscount);
        m_layout->addItem(m_separator, 1, 0, 1, buttonscount);
    }

    m_widget->setLayout(m_layout);

    m_scene->addItem(m_widget);
    setGraphicsWidget(m_widget);

    setFocus(Qt::ActiveWindowFocusReason);
    m_scene->installEventFilter(this);

    if (!choose) {
        m_cancelbutton->setFocus();
    } else if (sdtype == KWorkSpace::ShutdownTypeNone && m_logoutwidget) {
        m_logoutwidget->setFocus();
    } else if (sdtype == KWorkSpace::ShutdownTypeReboot && m_rebootwidget) {
        m_rebootwidget->setFocus();
    } else if (sdtype == KWorkSpace::ShutdownTypeHalt && m_haltwidget) {
        m_haltwidget->setFocus();
    }

    adjustSize();
    KDialog::centerOnScreen(this, -3);
}

KSMShutdownDlg::~KSMShutdownDlg()
{
    // make the screen become normal again
    KSMShutdownFeedback::stop();
    // delete m_widget;
}

void KSMShutdownDlg::hideEvent(QHideEvent *event)
{
    interrupt();
    Plasma::Dialog::hideEvent(event);
}

bool KSMShutdownDlg::eventFilter(QObject *watched, QEvent *event)
{
    if (watched == m_scene && event->type() == QEvent::WindowDeactivate) {
        interrupt();
    } else if (!m_timer && watched == m_logoutwidget && kSwitchTitleEvent(event)) {
        m_titlelabel->setText(i18n("Logout"));
    } else if (!m_timer && watched == m_rebootwidget && kSwitchTitleEvent(event)) {
        m_titlelabel->setText(i18n("Restart Computer"));
    } else if (!m_timer && watched == m_haltwidget && kSwitchTitleEvent(event)) {
        m_titlelabel->setText(i18n("Halt Computer"));
    } else if (!m_timer && watched == m_okbutton && kSwitchTitleEvent(event)) {
        m_titlelabel->setText(i18n("OK"));
    } else if (!m_timer && watched == m_cancelbutton && kSwitchTitleEvent(event)) {
        m_titlelabel->setText(i18n("Cancel"));
    }
    return Plasma::Dialog::eventFilter(watched, event);
}

void KSMShutdownDlg::slotLogout()
{
    m_shutdownType = KWorkSpace::ShutdownTypeNone;
    m_eventloop->exit(0);
}

void KSMShutdownDlg::slotReboot()
{
    m_shutdownType = KWorkSpace::ShutdownTypeReboot;
    m_eventloop->exit(0);
}

void KSMShutdownDlg::slotHalt()
{
    m_shutdownType = KWorkSpace::ShutdownTypeHalt;
    m_eventloop->exit(0);
}

void KSMShutdownDlg::slotOk()
{
    m_second = 0;
}

void KSMShutdownDlg::slotCancel()
{
    interrupt();
}

void KSMShutdownDlg::slotTimeout()
{
    switch (m_shutdownType) {
        case KWorkSpace::ShutdownTypeReboot: {
            m_titlelabel->setText(
                i18np("Restarting computer in 1 second.", "Restarting computer in %1 seconds.", m_second)
            );
            m_second--;
            if (m_second <= -1) {
                slotReboot();
            }
            break;
        }
        case KWorkSpace::ShutdownTypeHalt: {
            m_titlelabel->setText(
                i18np("Turning off computer in 1 second.", "Turning off computer in %1 seconds.", m_second)
            );
            m_second--;
            if (m_second <= -1) {
                slotHalt();
            }
            break;
        }
        default: {
            m_titlelabel->setText(
                i18np("Logging out in 1 second.", "Logging out in %1 seconds.", m_second)
            );
            m_second--;
            if (m_second <= -1) {
                slotLogout();
            }
            break;
        }
    }
}

bool KSMShutdownDlg::execDialog()
{
    KWindowSystem::setState(winId(), NET::SkipPager | NET::SkipTaskbar);
    animatedShow(Plasma::locationToDirection(Plasma::Location::Desktop));
    Q_ASSERT(!m_eventloop);
    m_eventloop = new QEventLoop(this);
    return (m_eventloop->exec() == 0);
}

void KSMShutdownDlg::interrupt()
{
    if (!m_eventloop) {
        return;
    }
    m_eventloop->exit(1);
    m_eventloop->deleteLater();
    m_eventloop = nullptr;
}

bool KSMShutdownDlg::confirmShutdown(bool maysd, bool choose, KWorkSpace::ShutdownType &sdtype)
{
    KSMShutdownDlg* dialog = new KSMShutdownDlg(nullptr, maysd, choose, sdtype);

    // NOTE: KWin logout effect expects class hint values to be ksmserver
    XClassHint classHint;
    classHint.res_name = const_cast<char*>("ksmserver");
    classHint.res_class = const_cast<char*>("ksmserver");
    XSetClassHint(QX11Info::display(), dialog->winId(), &classHint);

    dialog->setWindowRole("logoutdialog");

    bool result = dialog->execDialog();
    sdtype = dialog->m_shutdownType;

    delete dialog;

    return result;
}

#include "moc_shutdowndlg.cpp"