File indexing completed on 2024-04-21 03:59:29

 /*
     SPDX-FileCopyrightText: 2015 Martin Gräßlin <mgraesslin@kde.org>
 
     SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
 */
 #include "kwindoweffects_dummy_p.h"
 #include "kwindowshadow_dummy_p.h"
 #include "kwindowsystem_debug.h"
 #include "kwindowsystem_dummy_p.h"
 #include "kwindowsystemplugininterface_p.h"
 #include "pluginwrapper_p.h"
 
 #include <QDir>
 #include <QGuiApplication>
 #include <QJsonArray>
 #include <QLibrary>
 #include <QPluginLoader>
 
 Q_GLOBAL_STATIC(KWindowSystemPluginWrapper, s_pluginWrapper)
 
 static QStringList pluginCandidates()
 {
     QStringList ret;
     const auto paths = QCoreApplication::libraryPaths();
     for (const QString &path : paths) {
         static const QStringList searchFolders{
             QStringLiteral("/kf6/org.kde.kwindowsystem.platforms"),
             QStringLiteral("/kf6/kwindowsystem"),
         };
         for (const QString &searchFolder : searchFolders) {
             QDir pluginDir(path + searchFolder);
             if (!pluginDir.exists()) {
                 continue;
             }
             const auto entries = pluginDir.entryList(QDir::Files | QDir::NoDotAndDotDot);
             for (const QString &entry : entries) {
                 ret << pluginDir.absoluteFilePath(entry);
             }
         }
     }
     return ret;
 }
 
 static bool checkPlatform(const QJsonObject &metadata, const QString &platformName)
 {
     const QJsonArray platforms = metadata.value(QStringLiteral("MetaData")).toObject().value(QStringLiteral("platforms")).toArray();
     return std::any_of(platforms.begin(), platforms.end(), [&platformName](const QJsonValue &value) {
         return QString::compare(platformName, value.toString(), Qt::CaseInsensitive) == 0;
     });
 }
 
 static KWindowSystemPluginInterface *loadPlugin()
 {
     if (!qobject_cast<QGuiApplication *>(QCoreApplication::instance())) {
         qCWarning(LOG_KWINDOWSYSTEM) << "Cannot use KWindowSystem without a QGuiApplication";
         return nullptr;
     }
 
     QString platformName = QGuiApplication::platformName();
     if (platformName == QLatin1String("flatpak")) {
         // here we cannot know what is the actual windowing system, let's try it's env variable
         const auto flatpakPlatform = QString::fromLocal8Bit(qgetenv("QT_QPA_FLATPAK_PLATFORM"));
         if (!flatpakPlatform.isEmpty()) {
             platformName = flatpakPlatform;
         }
     }
 
     const QList<QStaticPlugin> staticPlugins = QPluginLoader::staticPlugins();
     for (const QStaticPlugin &staticPlugin : staticPlugins) {
         const QJsonObject metadata = staticPlugin.metaData();
         if (metadata.value(QLatin1String("IID")) != QLatin1String(KWindowSystemPluginInterface_iid)) {
             continue;
         }
         if (checkPlatform(metadata, platformName)) {
             KWindowSystemPluginInterface *interface = qobject_cast<KWindowSystemPluginInterface *>(staticPlugin.instance());
             if (interface) {
                 qCDebug(LOG_KWINDOWSYSTEM) << "Loaded a static plugin for platform" << platformName;
                 return interface;
             }
         }
     }
 
     const auto candidates = pluginCandidates();
     for (const QString &candidate : candidates) {
         if (!QLibrary::isLibrary(candidate)) {
             continue;
         }
         QPluginLoader loader(candidate);
         if (checkPlatform(loader.metaData(), platformName)) {
             KWindowSystemPluginInterface *interface = qobject_cast<KWindowSystemPluginInterface *>(loader.instance());
             if (interface) {
                 qCDebug(LOG_KWINDOWSYSTEM) << "Loaded plugin" << candidate << "for platform" << platformName;
                 return interface;
             }
         }
     }
 
     qCWarning(LOG_KWINDOWSYSTEM) << "Could not find any platform plugin";
     return nullptr;
 }
 
 KWindowSystemPluginWrapper::KWindowSystemPluginWrapper()
     : m_plugin(loadPlugin())
     , m_effects()
 {
     if (m_plugin) {
         m_effects.reset(m_plugin->createEffects());
     }
     if (!m_effects) {
         m_effects.reset(new KWindowEffectsPrivateDummy());
     }
 }
 
 KWindowSystemPluginWrapper::~KWindowSystemPluginWrapper()
 {
 }
 
 KWindowEffectsPrivate *KWindowSystemPluginWrapper::effects() const
 {
     return m_effects.get();
 }
 
 KWindowSystemPrivate *KWindowSystemPluginWrapper::createWindowSystem() const
 {
     KWindowSystemPrivate *p = nullptr;
     if (m_plugin) {
         p = m_plugin->createWindowSystem();
     }
     if (!p) {
         p = new KWindowSystemPrivateDummy();
     }
     return p;
 }
 
 KWindowShadowPrivate *KWindowSystemPluginWrapper::createWindowShadow() const
 {
     KWindowShadowPrivate *p = nullptr;
     if (m_plugin) {
         p = m_plugin->createWindowShadow();
     }
     if (!p) {
         p = new KWindowShadowPrivateDummy();
     }
     return p;
 }
 
 KWindowShadowTilePrivate *KWindowSystemPluginWrapper::createWindowShadowTile() const
 {
     KWindowShadowTilePrivate *p = nullptr;
     if (m_plugin) {
         p = m_plugin->createWindowShadowTile();
     }
     if (!p) {
         p = new KWindowShadowTilePrivateDummy();
     }
     return p;
 }
 
 const KWindowSystemPluginWrapper &KWindowSystemPluginWrapper::self()
 {
     return *s_pluginWrapper;
 }