File indexing completed on 2024-04-28 15:28:07

 /*
     This file is part of the KDE project
     SPDX-FileCopyrightText: 2021 Kai Uwe Broulik <kde@broulik.de>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "kuiserverv2jobtracker.h"
 #include "kuiserverv2jobtracker_p.h"
 
 #include "jobviewv3iface.h"
 #include "debug.h"
 
 #include <KJob>
 
 #include <QtGlobal>
 #include <QDBusConnection>
 #include <QDBusPendingCallWatcher>
 #include <QDBusPendingReply>
 #include <QGuiApplication>
 #include <QTimer>
 #include <QHash>
 #include <QVariantMap>
 
 Q_GLOBAL_STATIC(KSharedUiServerV2Proxy, serverProxy)
 
 struct JobView
 {
     QTimer *delayTimer = nullptr;
     org::kde::JobViewV3 *jobView = nullptr;
     QVariantMap currentState;
     QVariantMap pendingUpdates;
 };
 
 class KUiServerV2JobTrackerPrivate
 {
 public:
     KUiServerV2JobTrackerPrivate(KUiServerV2JobTracker *parent)
         : q(parent)
     {
         updateTimer.setInterval(0);
         updateTimer.setSingleShot(true);
         QObject::connect(&updateTimer, &QTimer::timeout, q, [this] {
             sendAllUpdates();
         });
     }
 
     KUiServerV2JobTracker *const q;
 
     void sendAllUpdates();
     void sendUpdate(JobView &view);
     void scheduleUpdate(KJob *job, const QString &key, const QVariant &value);
 
     void updateDestUrl(KJob *job);
 
     void requestView(KJob *job, const QString &desktopEntry);
 
     QHash<KJob *, JobView> jobViews;
     QTimer updateTimer;
 
     QMetaObject::Connection serverRegisteredConnection;
 };
 
 void KUiServerV2JobTrackerPrivate::scheduleUpdate(KJob *job, const QString &key, const QVariant &value)
 {
     auto &view = jobViews[job];
     view.currentState[key] = value;
     view.pendingUpdates[key] = value;
 
     if (!updateTimer.isActive()) {
         updateTimer.start();
     }
 }
 
 void KUiServerV2JobTrackerPrivate::sendAllUpdates()
 {
     for (auto it = jobViews.begin(), end = jobViews.end(); it != end; ++it) {
         sendUpdate(it.value());
     }
 }
 
 void KUiServerV2JobTrackerPrivate::sendUpdate(JobView &view)
 {
     if (!view.jobView) {
         return;
     }
 
     const QVariantMap updates = view.pendingUpdates;
     if (updates.isEmpty()) {
         return;
     }
 
     view.jobView->update(updates);
     view.pendingUpdates.clear();
 }
 
 void KUiServerV2JobTrackerPrivate::updateDestUrl(KJob *job)
 {
     scheduleUpdate(job, QStringLiteral("destUrl"), job->property("destUrl").toString());
 }
 
 void KUiServerV2JobTrackerPrivate::requestView(KJob *job, const QString &desktopEntry)
 {
     QPointer<KJob> jobGuard = job;
     auto &view = jobViews[job];
 
     QVariantMap hints = view.currentState;
     // Tells Plasma to show the job view right away, since the delay is always handled on our side
     hints.insert(QStringLiteral("immediate"), true);
     // Must not clear currentState as only Plasma 5.22+ will use properties from "hints",
     // there must still be a full update() call for earlier versions!
 
     if (job->isFinishedNotificationHidden()) {
         hints.insert(QStringLiteral("transient"), true);
     }
 
     auto reply = serverProxy()->uiserver()->requestView(desktopEntry, job->capabilities(), hints);
 
     QDBusPendingCallWatcher *watcher = new QDBusPendingCallWatcher(reply, q);
     QObject::connect(watcher, &QDBusPendingCallWatcher::finished, q, [this, watcher, jobGuard, job] {
         QDBusPendingReply<QDBusObjectPath> reply = *watcher;
         watcher->deleteLater();
 
         if (reply.isError()) {
             qCWarning(KJOBWIDGETS) << "Failed to register job with KUiServerV2JobTracker" << reply.error().message();
             jobViews.remove(job);
             return;
         }
 
         const QString viewObjectPath = reply.value().path();
         auto *jobView = new org::kde::JobViewV3(QStringLiteral("org.kde.JobViewServer"), viewObjectPath, QDBusConnection::sessionBus());
 
         auto &view = jobViews[job];
 
         if (jobGuard) {
             QObject::connect(jobView, &org::kde::JobViewV3::cancelRequested, job, [job] {
                 job->kill(KJob::EmitResult);
             });
             QObject::connect(jobView, &org::kde::JobViewV3::suspendRequested, job, &KJob::suspend);
             QObject::connect(jobView, &org::kde::JobViewV3::resumeRequested, job, &KJob::resume);
 
             view.jobView = jobView;
         }
 
         // Now send the full current job state over
         jobView->update(view.currentState);
         // which also contains all pending updates
         view.pendingUpdates.clear();
 
         // Job was deleted or finished in the meantime
         if (!jobGuard || view.currentState.value(QStringLiteral("terminated")).toBool()) {
             const uint errorCode = view.currentState.value(QStringLiteral("errorCode")).toUInt();
             const QString errorMessage = view.currentState.value(QStringLiteral("errorMessage")).toString();
 
             jobView->terminate(errorCode, errorMessage, QVariantMap() /*hints*/);
             delete jobView;
 
             jobViews.remove(job);
         }
     });
 }
 
 KUiServerV2JobTracker::KUiServerV2JobTracker(QObject *parent)
     : KJobTrackerInterface(parent)
     , d(new KUiServerV2JobTrackerPrivate(this))
 {
     qDBusRegisterMetaType<qulonglong>();
 }
 
 KUiServerV2JobTracker::~KUiServerV2JobTracker()
 {
     if (!d->jobViews.isEmpty()) {
         qCWarning(KJOBWIDGETS) << "A KUiServerV2JobTracker instance contains"
                                << d->jobViews.size() << "stalled jobs";
     }
 
     delete d;
 }
 
 void KUiServerV2JobTracker::registerJob(KJob *job)
 {
     if (d->jobViews.contains(job)) {
         return;
     }
 
     QString desktopEntry = job->property("desktopFileName").toString();
     if (desktopEntry.isEmpty()) {
         desktopEntry = QGuiApplication::desktopFileName();
     }
 
     if (desktopEntry.isEmpty()) {
         qCWarning(KJOBWIDGETS) << "Cannot register a job with KUiServerV2JobTracker without QGuiApplication::desktopFileName";
         return;
     }
 
     // Watch the server registering/unregistering and re-register the jobs as needed
     if (!d->serverRegisteredConnection) {
         d->serverRegisteredConnection = connect(serverProxy(), &KSharedUiServerV2Proxy::serverRegistered, this, [this]() {
             const auto staleViews = d->jobViews;
 
             // Delete the old views, remove the old struct but keep the state,
             // register the job again (which checks for presence, hence removing first)
             // and then restore its previous state, which is safe because the DBus
             // is async and is only processed once event loop returns
             for (auto it = staleViews.begin(), end = staleViews.end(); it != end; ++it) {
                 QPointer<KJob> jobGuard = it.key();
                 const JobView &view = it.value();
 
                 const auto oldState = view.currentState;
 
                 // It is possible that the KJob has been deleted already so do not
                 // use or deference if marked as terminated
                 if (oldState.value(QStringLiteral("terminated")).toBool()) {
                     const uint errorCode = oldState.value(QStringLiteral("errorCode")).toUInt();
                     const QString errorMessage = oldState.value(QStringLiteral("errorMessage")).toString();
 
                     if (view.jobView) {
                         view.jobView->terminate(errorCode, errorMessage, QVariantMap() /*hints*/);
                     }
 
                     delete view.jobView;
                     d->jobViews.remove(it.key());
                 } else {
                     delete view.jobView;
                     d->jobViews.remove(it.key()); // must happen before registerJob
 
                     if (jobGuard) {
                         registerJob(jobGuard);
 
                         d->jobViews[jobGuard].currentState = oldState;
                     }
                 }
             }
         });
     }
 
     // Send along current job state
     if (job->isSuspended()) {
         suspended(job);
     }
     if (job->error()) {
         d->scheduleUpdate(job, QStringLiteral("errorCode"), static_cast<uint>(job->error()));
         d->scheduleUpdate(job, QStringLiteral("errorMessage"), job->errorText());
     }
     for (int i = KJob::Bytes; i <= KJob::Items; ++i) {
         const auto unit = static_cast<KJob::Unit>(i);
 
         if (job->processedAmount(unit) > 0) {
             processedAmount(job, unit, job->processedAmount(unit));
         }
         if (job->totalAmount(unit) > 0) {
             totalAmount(job, unit, job->totalAmount(unit));
         }
     }
     if (job->percent() > 0) {
         percent(job, job->percent());
     }
     d->updateDestUrl(job);
 
     if (job->property("immediateProgressReporting").toBool()) {
         d->requestView(job, desktopEntry);
     } else {
         QPointer<KJob> jobGuard = job;
 
         QTimer *delayTimer = new QTimer();
         delayTimer->setSingleShot(true);
         connect(delayTimer, &QTimer::timeout, this, [this, job, jobGuard, desktopEntry] {
             auto &view = d->jobViews[job];
             if (view.delayTimer) {
                 view.delayTimer->deleteLater();
                 view.delayTimer = nullptr;
             }
 
             if (jobGuard) {
                 d->requestView(job, desktopEntry);
             }
         });
 
         d->jobViews[job].delayTimer = delayTimer;
         delayTimer->start(500);
     }
 
     KJobTrackerInterface::registerJob(job);
 }
 
 void KUiServerV2JobTracker::unregisterJob(KJob *job)
 {
     KJobTrackerInterface::unregisterJob(job);
     finished(job);
 }
 
 void KUiServerV2JobTracker::finished(KJob *job)
 {
     d->updateDestUrl(job);
 
     // send all pending updates before terminating to ensure state is correct
     auto &view = d->jobViews[job];
     d->sendUpdate(view);
 
     if (view.delayTimer) {
         delete view.delayTimer;
         d->jobViews.remove(job);
     } else if (view.jobView) {
         view.jobView->terminate(static_cast<uint>(job->error()),
                                 job->error() ? job->errorText() : QString(),
                                 QVariantMap() /*hints*/);
         delete view.jobView;
         d->jobViews.remove(job);
     } else {
         // Remember that the job finished in the meantime and
         // terminate the JobView once it arrives
         d->scheduleUpdate(job, QStringLiteral("terminated"), true);
         if (job->error()) {
             d->scheduleUpdate(job, QStringLiteral("errorCode"), static_cast<uint>(job->error()));
             d->scheduleUpdate(job, QStringLiteral("errorMessage"),  job->errorText());
         }
     }
 }
 
 void KUiServerV2JobTracker::suspended(KJob *job)
 {
     d->scheduleUpdate(job, QStringLiteral("suspended"), true);
 }
 
 void KUiServerV2JobTracker::resumed(KJob *job)
 {
     d->scheduleUpdate(job, QStringLiteral("suspended"), false);
 }
 
 void KUiServerV2JobTracker::description(KJob *job, const QString &title,
                                       const QPair<QString, QString> &field1,
                                       const QPair<QString, QString> &field2)
 {
     d->scheduleUpdate(job, QStringLiteral("title"), title);
 
     d->scheduleUpdate(job, QStringLiteral("descriptionLabel1"), field1.first);
     d->scheduleUpdate(job, QStringLiteral("descriptionValue1"), field1.second);
 
     d->scheduleUpdate(job, QStringLiteral("descriptionLabel2"), field2.first);
     d->scheduleUpdate(job, QStringLiteral("descriptionValue2"), field2.second);
 }
 
 void KUiServerV2JobTracker::infoMessage(KJob *job, const QString &plain, const QString &rich)
 {
     Q_UNUSED(rich);
     d->scheduleUpdate(job, QStringLiteral("infoMessage"), plain);
 }
 
 void KUiServerV2JobTracker::totalAmount(KJob *job, KJob::Unit unit, qulonglong amount)
 {
     switch (unit) {
     case KJob::Bytes:
         d->scheduleUpdate(job, QStringLiteral("totalBytes"), amount);
         break;
     case KJob::Files:
         d->scheduleUpdate(job, QStringLiteral("totalFiles"), amount);
         break;
     case KJob::Directories:
         d->scheduleUpdate(job, QStringLiteral("totalDirectories"), amount);
         break;
     case KJob::Items:
         d->scheduleUpdate(job, QStringLiteral("totalItems"), amount);
         break;
     case KJob::UnitsCount:
         Q_UNREACHABLE();
         break;
     }
 }
 
 void KUiServerV2JobTracker::processedAmount(KJob *job, KJob::Unit unit, qulonglong amount)
 {
     switch (unit) {
     case KJob::Bytes:
         d->scheduleUpdate(job, QStringLiteral("processedBytes"), amount);
         break;
     case KJob::Files:
         d->scheduleUpdate(job, QStringLiteral("processedFiles"), amount);
         break;
     case KJob::Directories:
         d->scheduleUpdate(job, QStringLiteral("processedDirectories"), amount);
         break;
     case KJob::Items:
         d->scheduleUpdate(job, QStringLiteral("processedItems"), amount);
         break;
     case KJob::UnitsCount:
         Q_UNREACHABLE();
         break;
     }
 }
 
 void KUiServerV2JobTracker::percent(KJob *job, unsigned long percent)
 {
     d->scheduleUpdate(job, QStringLiteral("percent"), static_cast<uint>(percent));
 }
 
 void KUiServerV2JobTracker::speed(KJob *job, unsigned long speed)
 {
     d->scheduleUpdate(job, QStringLiteral("speed"), static_cast<qulonglong>(speed));
 }
 
 KSharedUiServerV2Proxy::KSharedUiServerV2Proxy()
     : m_uiserver(new org::kde::JobViewServerV2(QStringLiteral("org.kde.JobViewServer"), QStringLiteral("/JobViewServer"), QDBusConnection::sessionBus()))
     , m_watcher(new QDBusServiceWatcher(QStringLiteral("org.kde.JobViewServer"), QDBusConnection::sessionBus(), QDBusServiceWatcher::WatchForOwnerChange))
 {
     connect(m_watcher.get(), &QDBusServiceWatcher::serviceOwnerChanged, this, &KSharedUiServerV2Proxy::uiserverOwnerChanged);
 
     // cleanup early enough to avoid issues with dbus at application exit
     // see e.g. https://phabricator.kde.org/D2545
     qAddPostRoutine([]() {
         serverProxy->m_uiserver.reset();
         serverProxy->m_watcher.reset();
     });
 }
 
 KSharedUiServerV2Proxy::~KSharedUiServerV2Proxy()
 {
 
 }
 
 org::kde::JobViewServerV2 *KSharedUiServerV2Proxy::uiserver()
 {
     return m_uiserver.get();
 }
 
 void KSharedUiServerV2Proxy::uiserverOwnerChanged(const QString &serviceName, const QString &oldOwner, const QString &newOwner)
 {
     Q_UNUSED(serviceName);
     Q_UNUSED(oldOwner);
 
     if (!newOwner.isEmpty()) { // registered
         Q_EMIT serverRegistered();
     } else if (newOwner.isEmpty()) { // unregistered
         Q_EMIT serverUnregistered();
     }
 }
 
 #include "moc_kuiserverv2jobtracker.cpp"
 #include "moc_kuiserverv2jobtracker_p.cpp"