File indexing completed on 2023-05-30 12:24:36

 // SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only OR LicenseRef-KDE-Accepted-GPL
 // SPDX-FileCopyrightText: 2022-2023 Harald Sitter <sitter@kde.org>
 
 #include <chrono>
 
 #include <QDebug>
 #include <QGuiApplication>
 #include <QJsonDocument>
 #include <QJsonObject>
 #include <QTimer>
 
 #include <KWayland/Client/connection_thread.h>
 #include <KWayland/Client/plasmawindowmanagement.h>
 #include <KWayland/Client/registry.h>
 
 #include <KWindowInfo>
 #include <KWindowSystem>
 #include <KX11Extras>
 
 using namespace std::chrono_literals;
 
 class WaylandLister : public QObject
 {
     Q_OBJECT
 public:
     explicit WaylandLister(QObject *parent = nullptr)
         : QObject(parent)
     {
         m_connection.reset(KWayland::Client::ConnectionThread::fromApplication());
         if (!m_connection) {
             qWarning() << "no connection";
             return;
         }
 
         m_registry.create(m_connection.get());
 
         QObject::connect(&m_registry,
                          &KWayland::Client::Registry::plasmaWindowManagementAnnounced,
                          this,
                          [this](quint32 name, quint32 version) {
                              m_windowManagement.reset(m_registry.createPlasmaWindowManagement(name, version));
                          });
 
         m_registry.setup();
 
         // We'll need 3 because getting the registry is async, getting the window management interface is another,
         // then we'll have requested information about every window. By the 3rd sync it should have sent everything.
         static constexpr auto syncTimes = 3;
         for (auto i = 0; i < syncTimes; i++) {
             QCoreApplication::processEvents();
             m_connection->roundtrip();
             QCoreApplication::processEvents();
         }
         QCoreApplication::processEvents();
         Q_ASSERT(m_windowManagement);
         const auto windows = m_windowManagement->windows();
         for (const auto &window : windows) {
             insert(window);
         }
     }
 
     void insert(KWayland::Client::PlasmaWindow *window)
     {
         m_pidsToAppIds.insert(QString::number(window->pid()), window->appId());
     }
 
     QVariantHash data() const
     {
         return m_pidsToAppIds;
     }
 
 private:
     QVariantHash m_pidsToAppIds;
     std::unique_ptr<KWayland::Client::ConnectionThread> m_connection;
     KWayland::Client::Registry m_registry;
     std::unique_ptr<KWayland::Client::PlasmaWindowManagement> m_windowManagement;
 };
 
 QVariantHash waylandPidsToAppIds()
 {
     WaylandLister lister;
     return lister.data();
 }
 
 QVariantHash x11PidsToAppIds()
 {
     QVariantHash pidsToAppIds;
     const auto wids = KX11Extras::windows();
     for (const auto &wid : wids) {
         const KWindowInfo info(wid, NET::WMPid, NET::WM2DesktopFileName | NET::WM2GTKApplicationId);
         if (!info.desktopFileName().isEmpty()) {
             pidsToAppIds.insert(QString::number(info.pid()), info.desktopFileName());
         }
         if (!info.gtkApplicationId().isEmpty()) {
             pidsToAppIds.insert(QString::number(info.pid()), info.gtkApplicationId());
         }
     }
     return pidsToAppIds;
 }
 
 int main(int argc, char **argv)
 {
     const QGuiApplication app(argc, argv);
 
     QVariantHash pidsToAppIds;
 
     if (KWindowSystem::isPlatformX11()) {
         pidsToAppIds.insert(x11PidsToAppIds());
     } else if (KWindowSystem::isPlatformWayland()) {
         pidsToAppIds.insert(waylandPidsToAppIds());
     } else {
         qFatal("unsupported platform");
         return 1;
     }
 
     // Always append .desktop for convenience. Means we can do straight forward string matching in the python side.
     for (auto it = pidsToAppIds.begin(); it != pidsToAppIds.end(); ++it) {
         static const QLatin1String suffix(".desktop");
         const QString value = it.value().toString();
         if (!value.endsWith(suffix)) {
             it->setValue(QString(value + suffix));
         }
     }
 
     const QJsonDocument doc(QJsonObject::fromVariantHash(pidsToAppIds));
     printf("%s\n", doc.toJson().constData());
     return 0;
 }
 
 #include "main.moc"