588 lines
24 KiB
C++
588 lines
24 KiB
C++
/*
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SPDX-FileCopyrightText: 2010 Ryan Rix <ry@n.rix.si>
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SPDX-License-Identifier: LGPL-2.0-or-later
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*/
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#ifndef PLUGIN_LOADER_H
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#define PLUGIN_LOADER_H
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#include <KPluginInfo>
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#include <plasma/package.h>
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#include <plasma/plasma.h>
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namespace Plasma
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{
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class Applet;
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class Containment;
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class ContainmentActions;
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class DataEngine;
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class Service;
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class PluginLoaderPrivate;
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// TODO:
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// * add loadWallpaper
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// * add KPluginInfo listing support for Containments (already loaded via the applet loading code)
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/**
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* @class PluginLoader plasma/pluginloader.h <Plasma/PluginLoader>
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*
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* This is an abstract base class which defines an interface to which Plasma's
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* Applet Loading logic can communicate with a parent application. The plugin loader
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* must be set before any plugins are loaded, otherwise (for safety reasons), the
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* default PluginLoader implementation will be used. The reimplemented version should
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* not do more than simply returning a loaded plugin. It should not init() it, and it should not
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* hang on to it. The associated methods will be called only when a component of Plasma
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* needs to load a _new_ plugin. (e.g. DataEngine does its own caching).
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*
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* @author Ryan Rix <ry@n.rix.si>
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* @since 4.6
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**/
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class PLASMA_EXPORT PluginLoader
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{
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public:
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/**
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* Load an Applet plugin.
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*
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* @param name the plugin name, as returned by KPluginInfo::pluginName()
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* @param appletId unique ID to assign the applet, or zero to have one
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* assigned automatically.
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* @param args to send the applet extra arguments
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* @return a pointer to the loaded applet, or 0 on load failure
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**/
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Applet *loadApplet(const QString &name, uint appletId = 0, const QVariantList &args = QVariantList());
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/**
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* Load a dataengine plugin.
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*
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* @param name the name of the engine
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* @return the dataengine that was loaded, or the NullEngine on failure.
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**/
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DataEngine *loadDataEngine(const QString &name);
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/**
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* @return a listing of all known dataengines by name
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*
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* @param parentApp the application to filter dataengines on. Uses the
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* X-KDE-ParentApp entry (if any) in the plugin info.
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* The default value of QString() will result in a
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* list of all dataengines.
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*/
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static QStringList listAllEngines(const QString &parentApp = QString());
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#if PLASMA_ENABLE_DEPRECATED_SINCE(5, 77)
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/**
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* Returns a list of all known dataengines.
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*
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* @param parentApp the application to filter dataengines on. Uses the
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* X-KDE-ParentApp entry (if any) in the plugin info.
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* The default value of QString() will result in a
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* list of all dataengines.
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* @return list of dataengines
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* @deprecated since 5.77, use listDataEngineMetaData instead.
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**/
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PLASMA_DEPRECATED_VERSION(5, 77, "Use listDataEngineMetaData instead")
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static KPluginInfo::List listEngineInfo(const QString &parentApp = QString());
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#endif
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#if PLASMA_ENABLE_DEPRECATED_SINCE(5, 81)
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/**
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* Returns a list of all known dataengines filtering by category.
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*
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* @param category the category to filter dataengines on. Uses the
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* X-KDE-PluginInfo-Category entry (if any) in the
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* plugin info. The value of QString() will
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* result in a list of dataengines with an empty category.
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*
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* @param parentApp the application to filter dataengines on. Uses the
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* X-KDE-ParentApp entry (if any) in the plugin info.
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* The default value of QString() will result in a
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* list of all dataengines in specified categories.
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* @return list of dataengines
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* @deprecated since 5.81, use listDataEngineMetaData() instead.
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* @since 4.3
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**/
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PLASMA_DEPRECATED_VERSION(5, 81, "Use listDataEngineMetaData instead")
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static KPluginInfo::List listEngineInfoByCategory(const QString &category, const QString &parentApp = QString());
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#endif
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/**
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* Load a Service plugin.
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*
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* @param name the plugin name of the service to load
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* @param args a list of arguments to supply to the service plugin when loading it
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* @param parent the parent object, if any, for the service
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*
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* @return a Service object, unlike Plasma::Service::loadService, this can return null.
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**/
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Service *loadService(const QString &name, const QVariantList &args, QObject *parent = nullptr);
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/**
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* Load a ContainmentActions plugin.
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*
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* Returns a pointer to the containmentactions if successful.
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* The caller takes responsibility for the containmentactions, including
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* deleting it when no longer needed.
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*
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* @param parent the parent containment. @since 4.6 null is allowed.
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* @param name the plugin name, as returned by KPluginInfo::pluginName()
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* @param args to send the containmentactions extra arguments
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* @return a ContainmentActions object
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**/
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ContainmentActions *loadContainmentActions(Containment *parent, const QString &containmentActionsName, const QVariantList &args = QVariantList());
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#if PLASMA_ENABLE_DEPRECATED_SINCE(5, 30)
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/**
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* Load a Package plugin.
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*
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* @param name the plugin name of the package to load
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* @param specialization used to find script extensions for the given format, e.g. "QML" for "Plasma/Applet"
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*
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* @return a Package object matching name, or an invalid package on failure
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* @deprecated Since 5.30, use KPackage::PackageLoader::loadPackage(const QString& packageFormat, const QString& packagePath) instead.
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**/
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PLASMA_DEPRECATED_VERSION(5, 30, "Use KPackage::PackageLoader::loadPackage(const QString&, const QString&")
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Package loadPackage(const QString &packageFormat, const QString &specialization = QString());
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#endif
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#if PLASMA_ENABLE_DEPRECATED_SINCE(5, 28)
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/**
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* Returns a list of all known applets.
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* This may skip applets based on security settings and ExcludeCategories in the application's config.
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*
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* @param category Only applets matching this category will be returned.
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* Useful in conjunction with knownCategories.
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* If "Misc" is passed in, then applets without a
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* Categories= entry are also returned.
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* If an empty string is passed in, all applets are
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* returned.
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* @param parentApp the application to filter applets on. Uses the
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* X-KDE-ParentApp entry (if any) in the plugin info.
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* The default value of QString() will result in a
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* list of all applets in specified category.
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* @return list of applets
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*
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* @deprecated Since 5.28. Doesn't support metadata.json packages.
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* Use listAppletMetaData(const QString &category, const QString &parentApp) instead.
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**/
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PLASMA_DEPRECATED_VERSION(5, 28, "Use PluginLoader::listAppletMetaData(const QString &, const QString &)")
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KPluginInfo::List listAppletInfo(const QString &category, const QString &parentApp = QString());
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#endif
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/**
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* Returns a list of all known applets.
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* This may skip applets based on security settings and ExcludeCategories in the application's config.
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*
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* @param category Only applets matching this category will be returned.
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* Useful in conjunction with knownCategories.
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* If "Misc" is passed in, then applets without a
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* Categories= entry are also returned.
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* If an empty string is passed in, all applets are
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* returned.
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* @param parentApp the application to filter applets on. Uses the
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* X-KDE-ParentApp entry (if any) in the plugin info.
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* The default value of QString() will result in a
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* list of all applets in specified categories.
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* @return list of applets
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*
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* @since 5.28
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**/
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QList<KPluginMetaData> listAppletMetaData(const QString &category, const QString &parentApp = QString());
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#if PLASMA_ENABLE_DEPRECATED_SINCE(5, 36)
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/**
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* Returns a list of all known applets associated with a certain mimetype.
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*
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* @return list of applets
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*
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* @deprecated Since 5.36, use listAppletMetaDataForMimeType(const QString &mimetype) instead.
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**/
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PLASMA_DEPRECATED_VERSION(5, 36, "Use PluginLoader::listAppletMetaDataForMimeType(const QString &)")
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KPluginInfo::List listAppletInfoForMimeType(const QString &mimetype);
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#endif
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/**
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* Returns a list of all known applets associated with a certain mimetype.
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*
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* @return list of applets
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* @since 5.36
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**/
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QList<KPluginMetaData> listAppletMetaDataForMimeType(const QString &mimetype);
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#if PLASMA_ENABLE_DEPRECATED_SINCE(5, 36)
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/**
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* Returns a list of all known applets associated with a certain URL.
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*
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* @return list of applets
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*
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* @deprecated Since 5.36, use listAppletMetaDataForUrl(const QUrl &url) instead.
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**/
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PLASMA_DEPRECATED_VERSION(5, 36, "Use PluginLoader::listAppletMetaDataForUrl(const QUrl &)")
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KPluginInfo::List listAppletInfoForUrl(const QUrl &url);
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#endif
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/**
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* Returns a list of all known applets associated with a certain URL.
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*
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* @return list of applets
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* @since 5.36
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**/
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QList<KPluginMetaData> listAppletMetaDataForUrl(const QUrl &url);
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/**
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* Returns a list of all the categories used by installed applets.
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*
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* @param parentApp the application to filter applets on. Uses the
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* X-KDE-ParentApp entry (if any) in the plugin info.
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* The default value of QString() will result in a
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* list of all Applets.
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* @return list of categories
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* @param visibleOnly true if it should only return applets that are marked as visible
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*/
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QStringList listAppletCategories(const QString &parentApp = QString(), bool visibleOnly = true);
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/**
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* Sets the list of custom categories that are used in addition to the default
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* set of categories known to libplasma for applets.
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* @param categories a list of categories
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* @since 4.3
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*/
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void setCustomAppletCategories(const QStringList &categories);
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/**
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* @return the list of custom categories known to libplasma
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* @since 4.3
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*/
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QStringList customAppletCategories() const;
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/**
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* Get the category of the given applet
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*
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* @param appletName the name of the applet
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*/
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QString appletCategory(const QString &appletName);
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#if PLASMA_ENABLE_DEPRECATED_SINCE(5, 83)
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/**
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* Returns a list of all known containments.
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*
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* @param category Only containments matching this category will be returned.
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* Useful in conjunction with knownCategories.
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* If "Miscellaneous" is passed in, then containments without a
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* Categories= entry are also returned.
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* If an empty string is passed in, all containments are
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* returned.
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* @param parentApp the application to filter containments on. Uses the
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* X-KDE-ParentApp entry (if any) in the plugin info.
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* The default value of QString() will result in a
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* list of all containments.
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* @deprecated since 5.83, use PluginLoader::listContainmentsMetaData
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* @return list of containments
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**/
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PLASMA_DEPRECATED_VERSION(5, 83, "Use PluginLoader::listContainmentsMetaData")
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static KPluginInfo::List listContainments(const QString &category = QString(), const QString &parentApp = QString());
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#endif
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/**
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* Returns a list of all known containments.
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*
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* @param filter An optional predicate that can be used for filtering.
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*
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* @return list of containments
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*/
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static QList<KPluginMetaData> listContainmentsMetaData(std::function<bool(const KPluginMetaData &)> filter = {});
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/**
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* Returns a list of containments of the specified type.
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*
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* @param type The target containment type
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*
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* @return list of containments
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*/
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static QList<KPluginMetaData> listContainmentsMetaDataOfType(const QString &type);
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#if PLASMA_ENABLE_DEPRECATED_SINCE(5, 83)
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/**
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* Returns a list of all known containments that match the parameters.
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*
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* @param type Only containments with this string in X-Plasma-ContainmentType
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* in their .desktop files will be returned. Common values are panel and
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* desktop
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* @param category Only containments matching this category will be returned.
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* Useful in conjunction with knownCategories.
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* If "Miscellaneous" is passed in, then containments without a
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* Categories= entry are also returned.
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* If an empty string is passed in, all containments are
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* returned.
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* @param parentApp the application to filter containments on. Uses the
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* X-KDE-ParentApp entry (if any) in the plugin info.
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* The default value of QString() will result in a
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* list of all containments, matching categories/type.
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* @deprecated since 5.83, use PluginLoader::listContainmentsMetaDataOfType
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* @return list of containments
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**/
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PLASMA_DEPRECATED_VERSION(5, 83, "Use PluginLoader::listContainmentsMetaDataOfType")
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static KPluginInfo::List listContainmentsOfType(const QString &type, const QString &category = QString(), const QString &parentApp = QString());
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#endif
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#if PLASMA_ENABLE_DEPRECATED_SINCE(5, 83)
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/**
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* @return a list of all known types of containments on this system
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*/
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PLASMA_DEPRECATED_VERSION(5,
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83,
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"Use PluginLoader::listContainmentsMetaDataOfType and aggregate the values of the X-Plasma-ContainmentType property instead")
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static QStringList listContainmentTypes();
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#endif
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#if PLASMA_ENABLE_DEPRECATED_SINCE(5, 83)
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/**
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* Returns a list of all known containments associated with a certain MimeType
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*
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* @return list of containments
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* @deprecated since 5.83, use listAppletMetaData() with custom filtering instead.
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**/
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PLASMA_DEPRECATED_VERSION(5, 83, "Use listAppletMetaData() with custom filtering")
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static KPluginInfo::List listContainmentsForMimeType(const QString &mimeType);
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#endif
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#if PLASMA_ENABLE_DEPRECATED_SINCE(5, 77)
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/**
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* Returns a list of all known dataengines.
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*
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* @param parentApp the application to filter dataengines on. Uses the
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* X-KDE-ParentApp entry (if any) in the plugin info.
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* The default value of QString() will result in a
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* list of all dataengines
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* @return list of dataengines
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* @deprecated since 5.77, use listDataEngineMetaData()
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**/
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PLASMA_DEPRECATED_VERSION(5, 77, "Use listDataEngineMetaData()")
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KPluginInfo::List listDataEngineInfo(const QString &parentApp = QString());
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#endif
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/**
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* Returns a list of all known dataengines.
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*
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* @param parentApp the application to filter dataengines on. Uses the
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* X-KDE-ParentApp entry (if any) in the plugin info.
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* The default value of QString() will result in a
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* list of all dataengines
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* @return list of dataengines
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* @since 5.77
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**/
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QVector<KPluginMetaData> listDataEngineMetaData(const QString &parentApp = QString());
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#if PLASMA_ENABLE_DEPRECATED_SINCE(5, 77)
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/**
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* Returns a list of all known ContainmentActions.
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*
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* @param parentApp the application to filter ContainmentActions on. Uses the
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* X-KDE-ParentApp entry (if any) in the plugin info.
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* The default value of QString() will result in a
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* list of all ContainmentActions.
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* @return list of ContainmentActions
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* @deprecated since 5.77, use listContainmentActionsMetaData()
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**/
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PLASMA_DEPRECATED_VERSION(5, 77, "Use listContainmentActionsMetaData()")
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KPluginInfo::List listContainmentActionsInfo(const QString &parentApp);
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#endif
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/**
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* Returns a list of all known ContainmentActions.
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*
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* @param parentApp the application to filter ContainmentActions on. Uses the
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* X-KDE-ParentApp entry (if any) in the plugin metadata.
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* The default value of QString() will result in a
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* list of all ContainmentActions.
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* @return list of ContainmentActions
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* @since 5.77
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**/
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QVector<KPluginMetaData> listContainmentActionsMetaData(const QString &parentApp);
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/**
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* Set the plugin loader which will be queried for all loads.
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*
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* @param loader A subclass of PluginLoader which will be supplied
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* by the application
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**/
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static void setPluginLoader(PluginLoader *loader);
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/**
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* Return the active plugin loader
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**/
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static PluginLoader *self();
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protected:
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/**
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* A re-implementable method that allows subclasses to override
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* the default behaviour of loadApplet. If the applet requested is not recognized,
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* then the implementation should return a NULL pointer. This method is called
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* by loadApplet prior to attempting to load an applet using the standard Plasma
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* plugin mechanisms.
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*
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* @param name the plugin name, as returned by KPluginInfo::pluginName()
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* @param appletId unique ID to assign the applet, or zero to have one
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* assigned automatically.
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* @param args to send the applet extra arguments
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* @return a pointer to the loaded applet, or 0 on load failure
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**/
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virtual Applet *internalLoadApplet(const QString &name, uint appletId = 0, const QVariantList &args = QVariantList());
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/**
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* A re-implementable method that allows subclasses to override
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* the default behaviour of loadDataEngine. If the engine requested is not recognized,
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* then the implementation should return a NULL pointer. This method is called
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* by loadDataEngine prior to attempting to load a DataEgine using the standard Plasma
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* plugin mechanisms.
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*
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* @param name the name of the engine
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* @return the data engine that was loaded, or the NullEngine on failure.
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**/
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virtual DataEngine *internalLoadDataEngine(const QString &name);
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/**
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* A re-implementable method that allows subclasses to override
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* the default behaviour of loadService. If the service requested is not recognized,
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* then the implementation should return a NULL pointer. This method is called
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* by loadService prior to attempting to load a Service using the standard Plasma
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* plugin mechanisms.
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*
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* @param name the plugin name of the service to load
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* @param args a list of arguments to supply to the service plugin when loading it
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* @param parent the parent object, if any, for the service
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*
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* @return a Service object, unlike Plasma::Service::loadService, this can return null.
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**/
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virtual Service *internalLoadService(const QString &name, const QVariantList &args, QObject *parent = nullptr);
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/**
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* A re-implementable method that allows subclasses to override
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* the default behaviour of loadContainmentActions. If the ContainmentActions requested is not recognized,
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* then the implementation should return a NULL pointer. This method is called
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* by loadService prior to attempting to load a Service using the standard Plasma
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* plugin mechanisms.
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*
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* Returns a pointer to the containmentactions if successful.
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* The caller takes responsibility for the containmentactions, including
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* deleting it when no longer needed.
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*
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* @param parent the parent containment. @since 4.6 null is allowed.
|
|
* @param name the plugin name, as returned by KPluginInfo::pluginName()
|
|
* @param args to send the containmentactions extra arguments
|
|
* @return a ContainmentActions object
|
|
**/
|
|
virtual ContainmentActions *internalLoadContainmentActions(Containment *parent, const QString &containmentActionsName, const QVariantList &args);
|
|
|
|
#if PLASMA_BUILD_DEPRECATED_SINCE(5, 83)
|
|
/**
|
|
* A re-implementable method that allows subclasses to override
|
|
* the default behaviour of loadPackage. If the service requested is not recognized,
|
|
* then the implementation should return a NULL pointer. This method is called
|
|
* by loadService prior to attempting to load a Service using the standard Plasma
|
|
* plugin mechanisms.
|
|
*
|
|
* @param name the plugin name of the service to load
|
|
* @param args a list of arguments to supply to the service plugin when loading it
|
|
* @param parent the parent object, if any, for the service
|
|
*
|
|
* @return a Service object, unlike Plasma::Service::loadService, this can return null.
|
|
* @deprecated since 5.30, use KPackage API
|
|
**/
|
|
PLASMA_DEPRECATED_VERSION(5, 30, "Use KPackage API")
|
|
virtual Package internalLoadPackage(const QString &name, const QString &specialization);
|
|
#endif
|
|
/**
|
|
* A re-implementable method that allows subclasses to provide additional applets
|
|
* for listAppletInfo. If the application has no applets to give to the application,
|
|
* then the implementation should return an empty list.
|
|
*
|
|
* This method is called by listAppletInfo prior to generating the list of applets installed
|
|
* on the system using the standard Plasma plugin mechanisms, and will try to find .desktop
|
|
* files for your applets.
|
|
*
|
|
* @param category Only applets matching this category will be returned.
|
|
* Useful in conjunction with knownCategories.
|
|
* If "Misc" is passed in, then applets without a
|
|
* Categories= entry are also returned.
|
|
* If an empty string is passed in, all applets are
|
|
* returned.
|
|
* @return list of applets
|
|
**/
|
|
virtual KPluginInfo::List internalAppletInfo(const QString &category) const;
|
|
|
|
/**
|
|
* A re-implementable method that allows subclasses to provide additional dataengines
|
|
* for DataEngine::listDataEngines.
|
|
*
|
|
* @return list of dataengine info, or an empty list if none
|
|
**/
|
|
virtual KPluginInfo::List internalDataEngineInfo() const;
|
|
|
|
/**
|
|
* Returns a list of all known Service implementations
|
|
*
|
|
* @return list of Service info, or an empty list if none
|
|
*/
|
|
virtual KPluginInfo::List internalServiceInfo() const;
|
|
|
|
/**
|
|
* Returns a list of all known ContainmentActions implementations
|
|
*
|
|
* @return list of ContainmentActions info, or an empty list if none
|
|
*/
|
|
virtual KPluginInfo::List internalContainmentActionsInfo() const;
|
|
|
|
/**
|
|
* Standardized mechanism for providing internal applets by install .desktop files
|
|
* in $APPPDATA/plasma/internal/applets/
|
|
*
|
|
* For applications that do this, internalAppletInfo can be implemented as a one-liner
|
|
* call to this method.
|
|
*
|
|
* @param category Only applets matching this category will be returned.
|
|
* Useful in conjunction with knownCategories.
|
|
* If "Misc" is passed in, then applets without a
|
|
* Categories= entry are also returned.
|
|
* If an empty string is passed in, all applets are
|
|
* returned.
|
|
* @return list of applets, or an empty list if none
|
|
*/
|
|
KPluginInfo::List standardInternalAppletInfo(const QString &category) const;
|
|
|
|
/**
|
|
* Standardized mechanism for providing internal dataengines by install .desktop files
|
|
* in $APPPDATA/plasma/internal/dataengines/
|
|
*
|
|
* For applications that do this, internalDataEngineInfo can be implemented as a one-liner
|
|
* call to this method.
|
|
*
|
|
* @return list of dataengines
|
|
*/
|
|
KPluginInfo::List standardInternalDataEngineInfo() const;
|
|
|
|
/**
|
|
* Standardized mechanism for providing internal services by install .desktop files
|
|
* in $APPPDATA/plasma/internal/services/
|
|
*
|
|
* For applications that do this, internalServiceInfo can be implemented as a one-liner
|
|
* call to this method.
|
|
*
|
|
* @return list of services
|
|
*/
|
|
KPluginInfo::List standardInternalServiceInfo() const;
|
|
|
|
PluginLoader();
|
|
virtual ~PluginLoader();
|
|
|
|
private:
|
|
PluginLoaderPrivate *const d;
|
|
};
|
|
|
|
}
|
|
|
|
Q_DECLARE_METATYPE(Plasma::PluginLoader *)
|
|
|
|
#endif
|