File indexing completed on 2024-05-12 17:07:09

 /*
     Plasma analog-clock drawing code:
 
     SPDX-FileCopyrightText: 1998 Luca Montecchiani <m.luca@usa.net>
     SPDX-FileCopyrightText: 2007 Aaron Seigo <aseigo@kde.org>
     SPDX-FileCopyrightText: 2007 Riccardo Iaconelli <riccardo@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "dtime.h"
 
 #include <stdlib.h>
 #include <sys/types.h>
 #include <time.h>
 #include <unistd.h>
 
 #include <QGroupBox>
 #include <QPainter>
 #include <QPushButton>
 #include <QTimeEdit>
 
 #include <KColorScheme>
 #include <KConfig>
 #include <KGlobal>
 #include <KMessageBox>
 #include <KProcess>
 #include <KSystemTimeZone>
 #include <KTreeWidgetSearchLine>
 #include <QDebug>
 #include <QGridLayout>
 #include <QHBoxLayout>
 #include <QVBoxLayout>
 
 #include <Plasma/Svg>
 
 #include "timedated_interface.h"
 
 #include "helper.h"
 
 Dtime::Dtime(QWidget *parent, bool haveTimeDated)
     : QWidget(parent)
     , m_haveTimedated(haveTimeDated)
 {
     setupUi(this);
 
     connect(setDateTimeAuto, &QCheckBox::toggled, this, &Dtime::serverTimeCheck);
     connect(setDateTimeAuto, &QCheckBox::toggled, this, &Dtime::configChanged);
 
     timeServerList->setEditable(false);
     connect(timeServerList, static_cast<void (QComboBox::*)(int)>(&QComboBox::activated), this, &Dtime::configChanged);
     connect(timeServerList, &QComboBox::editTextChanged, this, &Dtime::configChanged);
     connect(setDateTimeAuto, &QCheckBox::toggled, timeServerList, &QComboBox::setEnabled);
     timeServerList->setEnabled(false);
     timeServerList->setEditable(true);
 
     if (!haveTimeDated) {
         findNTPutility();
         if (ntpUtility.isEmpty()) {
             QString toolTip = i18n(
                 "No NTP utility has been found. "
                 "Install 'ntpdate' or 'rdate' command to enable automatic "
                 "updating of date and time.");
             setDateTimeAuto->setEnabled(false);
             setDateTimeAuto->setToolTip(toolTip);
             timeServerList->setToolTip(toolTip);
         }
     }
 
     QVBoxLayout *v2 = new QVBoxLayout(timeBox);
     v2->setContentsMargins(0, 0, 0, 0);
 
     kclock = new Kclock(timeBox);
     kclock->setObjectName(QStringLiteral("Kclock"));
     kclock->setMinimumSize(150, 150);
     v2->addWidget(kclock);
 
     QHBoxLayout *v3 = new QHBoxLayout();
     v2->addLayout(v3);
 
     v3->addStretch();
 
     timeEdit = new QTimeEdit(timeBox);
     timeEdit->setWrapping(true);
     timeEdit->setDisplayFormat(KLocale::global()->use12Clock() ? "hh:mm:ss ap" : "HH:mm:ss");
     v3->addWidget(timeEdit);
 
     v3->addStretch();
 
     QString wtstr = i18n(
         "Here you can change the system time. Click into the"
         " hours, minutes or seconds field to change the relevant value, either"
         " using the up and down buttons to the right or by entering a new value.");
     timeEdit->setWhatsThis(wtstr);
 
     connect(timeEdit, &QTimeEdit::timeChanged, this, &Dtime::set_time);
     connect(cal, &KDatePicker::dateChanged, this, &Dtime::changeDate);
 
     connect(&internalTimer, &QTimer::timeout, this, &Dtime::timeout);
 
     kclock->setEnabled(false);
 
     // Timezone
     connect(tzonelist, &K4TimeZoneWidget::itemSelectionChanged, this, &Dtime::configChanged);
     tzonesearch->setTreeWidget(tzonelist);
 }
 
 void Dtime::currentZone()
 {
     KTimeZone localZone = KSystemTimeZones::local();
 
     if (localZone.abbreviations().isEmpty()) {
         m_local->setText(i18nc("%1 is name of time zone", "Current local time zone: %1", K4TimeZoneWidget::displayName(localZone)));
     } else {
         m_local->setText(i18nc("%1 is name of time zone, %2 is its abbreviation",
                                "Current local time zone: %1 (%2)",
                                K4TimeZoneWidget::displayName(localZone),
                                QString::fromUtf8(localZone.abbreviations().constFirst())));
     }
 }
 
 void Dtime::serverTimeCheck()
 {
     // Enable time and date if the ntp utility is missing
     bool enabled = ntpUtility.isEmpty() || !setDateTimeAuto->isChecked();
     cal->setEnabled(enabled);
     timeEdit->setEnabled(enabled);
     // kclock->setEnabled(enabled);
 }
 
 void Dtime::findNTPutility()
 {
     QByteArray envpath = qgetenv("PATH");
     if (!envpath.isEmpty() && envpath.startsWith(':')) {
         envpath.remove(0, 1);
     }
 
     QStringList path = {"/sbin", "/usr/sbin"};
     if (!envpath.isEmpty()) {
         path += QFile::decodeName(envpath).split(QLatin1Char(':'));
     } else {
         path += {"/bin", "/usr/bin"};
     }
 
     const auto possible_ntputilities = {"ntpdate", "rdate"};
     for (const QString &possible_ntputility : possible_ntputilities) {
         ntpUtility = QStandardPaths::findExecutable(possible_ntputility, path);
         if (!ntpUtility.isEmpty()) {
             qDebug() << "ntpUtility = " << ntpUtility;
             return;
         }
     }
 
     qDebug() << "ntpUtility not found!";
 }
 
 void Dtime::set_time()
 {
     if (ontimeout)
         return;
 
     internalTimer.stop();
 
     time = timeEdit->time();
     kclock->setTime(time);
 
     Q_EMIT timeChanged(true);
 }
 
 void Dtime::changeDate(const QDate &d)
 {
     date = d;
     Q_EMIT timeChanged(true);
 }
 
 void Dtime::configChanged()
 {
     Q_EMIT timeChanged(true);
 }
 
 void Dtime::load()
 {
     QString currentTimeZone;
 
     if (m_haveTimedated) {
         OrgFreedesktopTimedate1Interface timeDatedIface(QStringLiteral("org.freedesktop.timedate1"),
                                                         QStringLiteral("/org/freedesktop/timedate1"),
                                                         QDBusConnection::systemBus());
         // the server list is not relevant for timesyncd, it fetches it from the network
         timeServerList->setVisible(false);
         timeServerLabel->setVisible(false);
         setDateTimeAuto->setEnabled(timeDatedIface.canNTP());
         setDateTimeAuto->setChecked(timeDatedIface.nTP());
 
         currentTimeZone = timeDatedIface.timezone();
     } else {
         // The config is actually written to the system config, but the user does not have any local config,
         // since there is nothing writing it.
         KConfig _config(QStringLiteral("kcmclockrc"), KConfig::NoGlobals);
         KConfigGroup config(&_config, "NTP");
         timeServerList->clear();
         timeServerList->addItems(config
                                      .readEntry("servers", i18n("Public Time Server (pool.ntp.org),\
         asia.pool.ntp.org,\
         europe.pool.ntp.org,\
         north-america.pool.ntp.org,\
         oceania.pool.ntp.org"))
                                      .split(',', Qt::SkipEmptyParts));
         setDateTimeAuto->setChecked(config.readEntry("enabled", false));
 
         if (ntpUtility.isEmpty()) {
             timeServerList->setEnabled(false);
         }
         currentTimeZone = KSystemTimeZones::local().name();
     }
 
     // Reset to the current date and time
     time = QTime::currentTime();
     date = QDate::currentDate();
     cal->setDate(date);
 
     // start internal timer
     internalTimer.start(1000);
 
     timeout();
 
     // Timezone
     currentZone();
 
     tzonelist->setSelected(currentTimeZone, true);
     Q_EMIT timeChanged(false);
 }
 
 QString Dtime::selectedTimeZone() const
 {
     QStringList selectedZones(tzonelist->selection());
     if (!selectedZones.isEmpty()) {
         return selectedZones.first();
     }
 
     return QString();
 }
 
 QStringList Dtime::ntpServers() const
 {
     // Save the order, but don't duplicate!
     QStringList list;
     if (timeServerList->count() != 0)
         list.append(timeServerList->currentText());
     for (int i = 0; i < timeServerList->count(); i++) {
         QString text = timeServerList->itemText(i);
         if (!list.contains(text))
             list.append(text);
         // Limit so errors can go away and not stored forever
         if (list.count() == 10)
             break;
     }
     return list;
 }
 
 bool Dtime::ntpEnabled() const
 {
     return setDateTimeAuto->isChecked();
 }
 
 QDateTime Dtime::userTime() const
 {
     return QDateTime(date, QTime(timeEdit->time()));
 }
 
 void Dtime::processHelperErrors(int code)
 {
     if (code & ClockHelper::NTPError) {
         KMessageBox::error(this, i18n("Unable to contact time server: %1.", timeServer));
         setDateTimeAuto->setChecked(false);
     }
     if (code & ClockHelper::DateError) {
         KMessageBox::error(this, i18n("Can not set date."));
     }
     if (code & ClockHelper::TimezoneError)
         KMessageBox::error(this, i18n("Error setting new time zone."), i18n("Time zone Error"));
 }
 
 void Dtime::timeout()
 {
     // get current time
     time = QTime::currentTime();
 
     ontimeout = true;
     timeEdit->setTime(time);
     ontimeout = false;
 
     kclock->setTime(time);
 }
 
 QString Dtime::quickHelp() const
 {
     return i18n(
         "<h1>Date & Time</h1> This system settings module can be used to set the system date and"
         " time. As these settings do not only affect you as a user, but rather the whole system, you"
         " can only change these settings when you start the System Settings as root. If you do not have"
         " the root password, but feel the system time should be corrected, please contact your system"
         " administrator.");
 }
 
 Kclock::Kclock(QWidget *parent)
     : QWidget(parent)
 {
     m_theme = new Plasma::Svg(this);
     m_theme->setImagePath(QStringLiteral("widgets/clock"));
     m_theme->setContainsMultipleImages(true);
 }
 
 Kclock::~Kclock()
 {
     delete m_theme;
 }
 
 void Kclock::showEvent(QShowEvent *event)
 {
     setClockSize(size());
     QWidget::showEvent(event);
 }
 
 void Kclock::resizeEvent(QResizeEvent *)
 {
     setClockSize(size());
 }
 
 void Kclock::setClockSize(const QSize &size)
 {
     int dim = qMin(size.width(), size.height());
     QSize newSize = QSize(dim, dim) * devicePixelRatioF();
 
     if (newSize != m_faceCache.size()) {
         m_faceCache = QPixmap(newSize);
         m_handsCache = QPixmap(newSize);
         m_glassCache = QPixmap(newSize);
         m_faceCache.setDevicePixelRatio(devicePixelRatioF());
         m_handsCache.setDevicePixelRatio(devicePixelRatioF());
         m_glassCache.setDevicePixelRatio(devicePixelRatioF());
 
         m_theme->resize(QSize(dim, dim));
         m_repaintCache = RepaintAll;
     }
 }
 
 void Kclock::setTime(const QTime &time)
 {
     if (time.minute() != this->time.minute() || time.hour() != this->time.hour()) {
         if (m_repaintCache == RepaintNone) {
             m_repaintCache = RepaintHands;
         }
     }
     this->time = time;
     update();
 }
 
 void Kclock::drawHand(QPainter *p, const QRect &rect, const qreal verticalTranslation, const qreal rotation, const QString &handName)
 {
     // this code assumes the following conventions in the svg file:
     // - the _vertical_ position of the hands should be set with respect to the center of the face
     // - the _horizontal_ position of the hands does not matter
     // - the _shadow_ elements should have the same vertical position as their _hand_ element counterpart
 
     QRectF elementRect;
     QString name = handName + "HandShadow";
     if (m_theme->hasElement(name)) {
         p->save();
 
         elementRect = m_theme->elementRect(name);
         if (rect.height() < 64)
             elementRect.setWidth(elementRect.width() * 2.5);
         static const QPoint offset = QPoint(2, 3);
 
         p->translate(rect.x() + (rect.width() / 2) + offset.x(), rect.y() + (rect.height() / 2) + offset.y());
         p->rotate(rotation);
         p->translate(-elementRect.width() / 2, elementRect.y() - verticalTranslation);
         m_theme->paint(p, QRectF(QPointF(0, 0), elementRect.size()), name);
 
         p->restore();
     }
 
     p->save();
 
     name = handName + "Hand";
     elementRect = m_theme->elementRect(name);
     if (rect.height() < 64) {
         elementRect.setWidth(elementRect.width() * 2.5);
     }
 
     p->translate(rect.x() + rect.width() / 2, rect.y() + rect.height() / 2);
     p->rotate(rotation);
     p->translate(-elementRect.width() / 2, elementRect.y() - verticalTranslation);
     m_theme->paint(p, QRectF(QPointF(0, 0), elementRect.size()), name);
 
     p->restore();
 }
 
 void Kclock::paintInterface(QPainter *p, const QRect &rect)
 {
     const bool m_showSecondHand = true;
 
     // compute hand angles
     const qreal minutes = 6.0 * time.minute() - 180;
     const qreal hours = 30.0 * time.hour() - 180 + ((time.minute() / 59.0) * 30.0);
     qreal seconds = 0;
     if (m_showSecondHand) {
         static const double anglePerSec = 6;
         seconds = anglePerSec * time.second() - 180;
     }
 
     // paint face and glass cache
     QRect faceRect = m_faceCache.rect();
     QRect targetRect = QRect(QPoint(0, 0), QSize(qRound(m_faceCache.width() / devicePixelRatioF()), qRound(m_faceCache.height() / devicePixelRatioF())));
 
     if (m_repaintCache == RepaintAll) {
         m_faceCache.fill(Qt::transparent);
         m_glassCache.fill(Qt::transparent);
 
         QPainter facePainter(&m_faceCache);
         QPainter glassPainter(&m_glassCache);
         facePainter.setRenderHint(QPainter::SmoothPixmapTransform);
         glassPainter.setRenderHint(QPainter::SmoothPixmapTransform);
 
         m_theme->paint(&facePainter, targetRect, QStringLiteral("ClockFace"));
 
         glassPainter.save();
         QRectF elementRect = QRectF(QPointF(0, 0), m_theme->elementSize(QStringLiteral("HandCenterScrew")));
         glassPainter.translate(faceRect.width() / (2 * devicePixelRatioF()) - elementRect.width() / 2,
                                faceRect.height() / (2 * devicePixelRatioF()) - elementRect.height() / 2);
         m_theme->paint(&glassPainter, elementRect, QStringLiteral("HandCenterScrew"));
         glassPainter.restore();
 
         m_theme->paint(&glassPainter, targetRect, QStringLiteral("Glass"));
 
         // get vertical translation, see drawHand() for more details
         m_verticalTranslation = m_theme->elementRect(QStringLiteral("ClockFace")).center().y();
     }
 
     // paint hour and minute hands cache
     if (m_repaintCache == RepaintHands || m_repaintCache == RepaintAll) {
         m_handsCache.fill(Qt::transparent);
 
         QPainter handsPainter(&m_handsCache);
         handsPainter.drawPixmap(targetRect, m_faceCache, faceRect);
         handsPainter.setRenderHint(QPainter::SmoothPixmapTransform);
 
         drawHand(&handsPainter, targetRect, m_verticalTranslation, hours, QStringLiteral("Hour"));
         drawHand(&handsPainter, targetRect, m_verticalTranslation, minutes, QStringLiteral("Minute"));
     }
 
     // reset repaint cache flag
     m_repaintCache = RepaintNone;
 
     // paint caches and second hand
     if (targetRect.width() < rect.width()) {
         targetRect.moveLeft((rect.width() - targetRect.width()) / 2);
     }
 
     p->drawPixmap(targetRect, m_handsCache, faceRect);
     if (m_showSecondHand) {
         p->setRenderHint(QPainter::SmoothPixmapTransform);
         drawHand(p, targetRect, m_verticalTranslation, seconds, QStringLiteral("Second"));
     }
     p->drawPixmap(targetRect, m_glassCache, faceRect);
 }
 
 void Kclock::paintEvent(QPaintEvent *)
 {
     QPainter paint(this);
 
     paint.setRenderHint(QPainter::Antialiasing);
     paintInterface(&paint, rect());
 }