File indexing completed on 2024-11-10 04:56:44

 /*
     KWin - the KDE window manager
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 2014 Martin Gräßlin <mgraesslin@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 // own
 #include "effect/effectloader.h"
 // config
 #include <config-kwin.h>
 // KWin
 #include "effect/effect.h"
 #include "effect/effecthandler.h"
 #include "plugin.h"
 #include "scripting/scriptedeffect.h"
 #include "scripting/scriptedquicksceneeffect.h"
 #include "scripting/scripting.h"
 #include "utils/common.h"
 // KDE
 #include <KConfigGroup>
 #include <KPackage/Package>
 #include <KPackage/PackageLoader>
 // Qt
 #include <QDebug>
 #include <QFutureWatcher>
 #include <QPluginLoader>
 #include <QQmlComponent>
 #include <QQmlEngine>
 #include <QStaticPlugin>
 #include <QStringList>
 #include <QtConcurrentRun>
 
 namespace KWin
 {
 
 AbstractEffectLoader::AbstractEffectLoader(QObject *parent)
     : QObject(parent)
 {
 }
 
 AbstractEffectLoader::~AbstractEffectLoader()
 {
 }
 
 void AbstractEffectLoader::setConfig(KSharedConfig::Ptr config)
 {
     m_config = config;
 }
 
 LoadEffectFlags AbstractEffectLoader::readConfig(const QString &effectName, bool defaultValue) const
 {
     Q_ASSERT(m_config);
     KConfigGroup plugins(m_config, QStringLiteral("Plugins"));
 
     const QString key = effectName + QStringLiteral("Enabled");
 
     // do we have a key for the effect?
     if (plugins.hasKey(key)) {
         // we have a key in the config, so read the enabled state
         const bool load = plugins.readEntry(key, defaultValue);
         return load ? LoadEffectFlags(LoadEffectFlag::Load) : LoadEffectFlags();
     }
     // we don't have a key, so we just use the enabled by default value
     if (defaultValue) {
         return LoadEffectFlag::Load | LoadEffectFlag::CheckDefaultFunction;
     }
     return LoadEffectFlags();
 }
 
 static const QString s_serviceType = QStringLiteral("KWin/Effect");
 
 ScriptedEffectLoader::ScriptedEffectLoader(QObject *parent)
     : AbstractEffectLoader(parent)
     , m_queue(new EffectLoadQueue<ScriptedEffectLoader, KPluginMetaData>(this))
 {
 }
 
 ScriptedEffectLoader::~ScriptedEffectLoader()
 {
 }
 
 bool ScriptedEffectLoader::hasEffect(const QString &name) const
 {
     return findEffect(name).isValid();
 }
 
 bool ScriptedEffectLoader::isEffectSupported(const QString &name) const
 {
     // scripted effects are in general supported
     if (!ScriptedEffect::supported()) {
         return false;
     }
     return hasEffect(name);
 }
 
 QStringList ScriptedEffectLoader::listOfKnownEffects() const
 {
     const auto effects = findAllEffects();
     QStringList result;
     for (const auto &service : effects) {
         result << service.pluginId();
     }
     return result;
 }
 
 bool ScriptedEffectLoader::loadEffect(const QString &name)
 {
     auto effect = findEffect(name);
     if (!effect.isValid()) {
         return false;
     }
     return loadEffect(effect, LoadEffectFlag::Load);
 }
 
 bool ScriptedEffectLoader::loadEffect(const KPluginMetaData &effect, LoadEffectFlags flags)
 {
     const QString name = effect.pluginId();
     if (!flags.testFlag(LoadEffectFlag::Load)) {
         qCDebug(KWIN_CORE) << "Loading flags disable effect: " << name;
         return false;
     }
 
     if (m_loadedEffects.contains(name)) {
         qCDebug(KWIN_CORE) << name << "already loaded";
         return false;
     }
 
     const QString api = effect.value(QStringLiteral("X-Plasma-API"));
     if (api == QLatin1String("javascript")) {
         return loadJavascriptEffect(effect);
     } else if (api == QLatin1String("declarativescript")) {
         return loadDeclarativeEffect(effect);
     } else {
         qCWarning(KWIN_CORE, "Failed to load %s effect: invalid X-Plasma-API field: %s. "
                              "Available options are javascript, and declarativescript", qPrintable(name), qPrintable(api));
     }
 
     return false;
 }
 
 bool ScriptedEffectLoader::loadJavascriptEffect(const KPluginMetaData &effect)
 {
     const QString name = effect.pluginId();
     if (!ScriptedEffect::supported()) {
         qCDebug(KWIN_CORE) << "Effect is not supported: " << name;
         return false;
     }
 
     ScriptedEffect *e = ScriptedEffect::create(effect);
     if (!e) {
         qCDebug(KWIN_CORE) << "Could not initialize scripted effect: " << name;
         return false;
     }
     connect(e, &ScriptedEffect::destroyed, this, [this, name]() {
         m_loadedEffects.removeAll(name);
     });
 
     qCDebug(KWIN_CORE) << "Successfully loaded scripted effect: " << name;
     Q_EMIT effectLoaded(e, name);
     m_loadedEffects << name;
     return true;
 }
 
 bool ScriptedEffectLoader::loadDeclarativeEffect(const KPluginMetaData &metadata)
 {
     const QString name = metadata.pluginId();
     const QString scriptFile = QStandardPaths::locate(QStandardPaths::GenericDataLocation,
                                                       QLatin1String("kwin/effects/") + name + QLatin1String("/contents/ui/main.qml"));
     if (scriptFile.isNull()) {
         qCWarning(KWIN_CORE) << "Could not locate the effect script";
         return false;
     }
 
     QQmlEngine *engine = Scripting::self()->qmlEngine();
     QQmlComponent component(engine);
     component.loadUrl(QUrl::fromLocalFile(scriptFile));
     if (component.isError()) {
         qCWarning(KWIN_CORE).nospace() << "Failed to load " << scriptFile << ": " << component.errors();
         return false;
     }
 
     QObject *object = component.beginCreate(engine->rootContext());
     auto effect = qobject_cast<ScriptedQuickSceneEffect *>(object);
     if (!effect) {
         qCDebug(KWIN_CORE) << "Could not initialize scripted effect: " << name;
         delete object;
         return false;
     }
     effect->setMetaData(metadata);
     component.completeCreate();
 
     connect(effect, &Effect::destroyed, this, [this, name]() {
         m_loadedEffects.removeAll(name);
     });
 
     qCDebug(KWIN_CORE) << "Successfully loaded scripted effect: " << name;
     Q_EMIT effectLoaded(effect, name);
     m_loadedEffects << name;
     return true;
 }
 
 void ScriptedEffectLoader::queryAndLoadAll()
 {
     if (m_queryConnection) {
         return;
     }
     // perform querying for the services in a thread
     QFutureWatcher<QList<KPluginMetaData>> *watcher = new QFutureWatcher<QList<KPluginMetaData>>(this);
     m_queryConnection = connect(
         watcher, &QFutureWatcher<QList<KPluginMetaData>>::finished, this, [this, watcher]() {
             const auto effects = watcher->result();
             for (const auto &effect : effects) {
                 const LoadEffectFlags flags = readConfig(effect.pluginId(), effect.isEnabledByDefault());
                 if (flags.testFlag(LoadEffectFlag::Load)) {
                     m_queue->enqueue(qMakePair(effect, flags));
                 }
             }
             watcher->deleteLater();
             m_queryConnection = QMetaObject::Connection();
         },
         Qt::QueuedConnection);
     watcher->setFuture(QtConcurrent::run(&ScriptedEffectLoader::findAllEffects, this));
 }
 
 QList<KPluginMetaData> ScriptedEffectLoader::findAllEffects() const
 {
     return KPackage::PackageLoader::self()->listPackages(s_serviceType, QStringLiteral("kwin/effects"));
 }
 
 KPluginMetaData ScriptedEffectLoader::findEffect(const QString &name) const
 {
     const auto plugins = KPackage::PackageLoader::self()->findPackages(s_serviceType, QStringLiteral("kwin/effects"),
                                                                        [name](const KPluginMetaData &metadata) {
                                                                            return metadata.pluginId().compare(name, Qt::CaseInsensitive) == 0;
                                                                        });
     if (!plugins.isEmpty()) {
         return plugins.first();
     }
     return KPluginMetaData();
 }
 
 void ScriptedEffectLoader::clear()
 {
     disconnect(m_queryConnection);
     m_queryConnection = QMetaObject::Connection();
     m_queue->clear();
 }
 
 PluginEffectLoader::PluginEffectLoader(QObject *parent)
     : AbstractEffectLoader(parent)
     , m_pluginSubDirectory(QStringLiteral("kwin/effects/plugins"))
 {
 }
 
 PluginEffectLoader::~PluginEffectLoader()
 {
 }
 
 bool PluginEffectLoader::hasEffect(const QString &name) const
 {
     const auto info = findEffect(name);
     return info.isValid();
 }
 
 KPluginMetaData PluginEffectLoader::findEffect(const QString &name) const
 {
     const auto plugins = KPluginMetaData::findPlugins(m_pluginSubDirectory,
                                                       [name](const KPluginMetaData &data) {
                                                           return data.pluginId().compare(name, Qt::CaseInsensitive) == 0;
                                                       });
     if (plugins.isEmpty()) {
         return KPluginMetaData();
     }
     return plugins.first();
 }
 
 bool PluginEffectLoader::isEffectSupported(const QString &name) const
 {
     if (EffectPluginFactory *effectFactory = factory(findEffect(name))) {
         return effectFactory->isSupported();
     }
     return false;
 }
 
 EffectPluginFactory *PluginEffectLoader::factory(const KPluginMetaData &info) const
 {
     if (!info.isValid()) {
         return nullptr;
     }
     KPluginFactory *factory;
     if (info.isStaticPlugin()) {
         // in case of static plugins we don't need to worry about the versions, because
         // they are shipped as part of the kwin executables
         factory = KPluginFactory::loadFactory(info).plugin;
     } else {
         QPluginLoader loader(info.fileName());
         if (loader.metaData().value("IID").toString() != QLatin1String(EffectPluginFactory_iid)) {
             qCDebug(KWIN_CORE) << info.pluginId() << " has not matching plugin version, expected " << PluginFactory_iid << "got "
                                << loader.metaData().value("IID");
             return nullptr;
         }
         factory = qobject_cast<KPluginFactory *>(loader.instance());
     }
     if (!factory) {
         qCDebug(KWIN_CORE) << "Did not get KPluginFactory for " << info.pluginId();
         return nullptr;
     }
     return dynamic_cast<EffectPluginFactory *>(factory);
 }
 
 QStringList PluginEffectLoader::listOfKnownEffects() const
 {
     const auto plugins = findAllEffects();
     QStringList result;
     for (const auto &plugin : plugins) {
         result << plugin.pluginId();
     }
     qCDebug(KWIN_CORE) << result;
     return result;
 }
 
 bool PluginEffectLoader::loadEffect(const QString &name)
 {
     const auto info = findEffect(name);
     if (!info.isValid()) {
         return false;
     }
     return loadEffect(info, LoadEffectFlag::Load);
 }
 
 bool PluginEffectLoader::loadEffect(const KPluginMetaData &info, LoadEffectFlags flags)
 {
     if (!info.isValid()) {
         qCDebug(KWIN_CORE) << "Plugin info is not valid";
         return false;
     }
     const QString name = info.pluginId();
     if (!flags.testFlag(LoadEffectFlag::Load)) {
         qCDebug(KWIN_CORE) << "Loading flags disable effect: " << name;
         return false;
     }
     if (m_loadedEffects.contains(name)) {
         qCDebug(KWIN_CORE) << name << " already loaded";
         return false;
     }
     EffectPluginFactory *effectFactory = factory(info);
     if (!effectFactory) {
         qCDebug(KWIN_CORE) << "Couldn't get an EffectPluginFactory for: " << name;
         return false;
     }
 
     effects->makeOpenGLContextCurrent(); // TODO: remove it
     if (!effectFactory->isSupported()) {
         qCDebug(KWIN_CORE) << "Effect is not supported: " << name;
         return false;
     }
 
     if (flags.testFlag(LoadEffectFlag::CheckDefaultFunction)) {
         if (!effectFactory->enabledByDefault()) {
             qCDebug(KWIN_CORE) << "Enabled by default function disables effect: " << name;
             return false;
         }
     }
 
     // ok, now we can try to create the Effect
     Effect *e = effectFactory->createEffect();
     if (!e) {
         qCDebug(KWIN_CORE) << "Failed to create effect: " << name;
         return false;
     }
     // insert in our loaded effects
     m_loadedEffects << name;
     connect(e, &Effect::destroyed, this, [this, name]() {
         m_loadedEffects.removeAll(name);
     });
     qCDebug(KWIN_CORE) << "Successfully loaded plugin effect: " << name;
     Q_EMIT effectLoaded(e, name);
     return true;
 }
 
 void PluginEffectLoader::queryAndLoadAll()
 {
     const auto effects = findAllEffects();
     for (const auto &effect : effects) {
         const LoadEffectFlags flags = readConfig(effect.pluginId(), effect.isEnabledByDefault());
         if (flags.testFlag(LoadEffectFlag::Load)) {
             loadEffect(effect, flags);
         }
     }
 }
 
 QList<KPluginMetaData> PluginEffectLoader::findAllEffects() const
 {
     return KPluginMetaData::findPlugins(m_pluginSubDirectory);
 }
 
 void PluginEffectLoader::setPluginSubDirectory(const QString &directory)
 {
     m_pluginSubDirectory = directory;
 }
 
 void PluginEffectLoader::clear()
 {
 }
 
 EffectLoader::EffectLoader(QObject *parent)
     : AbstractEffectLoader(parent)
 {
     m_loaders << new ScriptedEffectLoader(this)
               << new PluginEffectLoader(this);
     for (auto it = m_loaders.constBegin(); it != m_loaders.constEnd(); ++it) {
         connect(*it, &AbstractEffectLoader::effectLoaded, this, &AbstractEffectLoader::effectLoaded);
     }
 }
 
 EffectLoader::~EffectLoader()
 {
 }
 
 bool EffectLoader::hasEffect(const QString &name) const
 {
     return std::any_of(m_loaders.cbegin(), m_loaders.cend(), [&name](const auto &loader) {
         return loader->hasEffect(name);
     });
 }
 
 bool EffectLoader::isEffectSupported(const QString &name) const
 {
     return std::any_of(m_loaders.cbegin(), m_loaders.cend(), [&name](const auto &loader) {
         return loader->isEffectSupported(name);
     });
 }
 
 QStringList EffectLoader::listOfKnownEffects() const
 {
     QStringList result;
     for (auto it = m_loaders.constBegin(); it != m_loaders.constEnd(); ++it) {
         result << (*it)->listOfKnownEffects();
     }
     return result;
 }
 
 bool EffectLoader::loadEffect(const QString &name)
 {
     for (auto it = m_loaders.constBegin(); it != m_loaders.constEnd(); ++it) {
         if ((*it)->loadEffect(name)) {
             return true;
         }
     }
     return false;
 }
 
 void EffectLoader::queryAndLoadAll()
 {
     for (auto it = m_loaders.constBegin(); it != m_loaders.constEnd(); ++it) {
         (*it)->queryAndLoadAll();
     }
 }
 
 void EffectLoader::setConfig(KSharedConfig::Ptr config)
 {
     AbstractEffectLoader::setConfig(config);
     for (auto it = m_loaders.constBegin(); it != m_loaders.constEnd(); ++it) {
         (*it)->setConfig(config);
     }
 }
 
 void EffectLoader::clear()
 {
     for (auto it = m_loaders.constBegin(); it != m_loaders.constEnd(); ++it) {
         (*it)->clear();
     }
 }
 
 } // namespace KWin
 
 #include "moc_effectloader.cpp"