File indexing completed on 2025-01-05 04:49:49

 /*
  * SPDX-FileCopyrightText: 2016 Daniel Vrátil <dvratil@kde.org>
  *
  * SPDX-License-Identifier: GPL-2.0-or-later
  *
  */
 
 #include "settingschangenotifier.h"
 #include "pimeventsplugin_debug.h"
 
 #include <QCoreApplication>
 #include <QVariant>
 
 #define APP_PROPERTY_NAME "PIMEventsPluginSettingsChangeNotifier"
 
 SettingsChangeNotifier *SettingsChangeNotifier::self()
 {
     // We can't easily use a global static (or a static member) to store the
     // global instance of SettingsChangeNotifier. We need the same instance to
     // be accessible by both PimEventsPlugin and PimCalendarsPlugin so I would
     // have to put this class to a .so and link it from both to get a
     // singleton that actually works across the plugins. But being the lazy
     // bastard that I am I decided to just abuse QObject::property() and the qApp
     // singleton which already comes from an .so linked by both plugins.
     //
     // Also note the cast to quintptr: we have the same problem as above with
     // SettingsChangeNotifier::staticMetaObject as each "copy" of the class
     // has its own instance of it, which causes  pointer comparison in
     // QMetaObject::inherits() to fail. This leads to v.isValid() being true but
     // v.value<SettingsChangeNotifier*>() returning a null pointer, because
     // the internal qobject_cast fails.
     //
     // Yeah, I could have totally spent 30 seconds of my time and write the 6
     // lines of CMake code to get my own .so and have it linked from both plugins,
     // but instead I decided to explain myself in this comment, probably because
     // short code with long comments makes it look like I know what I'm doing.
     const QVariant v = qApp->property(APP_PROPERTY_NAME);
     if (v.isValid()) {
         return reinterpret_cast<SettingsChangeNotifier *>(v.value<quintptr>());
     }
 
     auto notifier = new SettingsChangeNotifier();
     qApp->setProperty(APP_PROPERTY_NAME, reinterpret_cast<quintptr>(notifier));
     return notifier;
 }
 
 SettingsChangeNotifier::SettingsChangeNotifier(QObject *parent)
     : QObject(parent)
 {
     qCDebug(PIMEVENTSPLUGIN_LOG) << this << "created";
 }
 
 SettingsChangeNotifier::~SettingsChangeNotifier() = default;
 
 void SettingsChangeNotifier::notifySettingsChanged()
 {
     Q_EMIT settingsChanged();
 }
 
 #include "moc_settingschangenotifier.cpp"