/* * Copyright 2006-2007 Aaron Seigo * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU Library General Public License as * published by the Free Software Foundation; either version 2, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details * * You should have received a copy of the GNU Library General Public * License along with this program; if not, write to the * Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef RUNNER_H #define RUNNER_H #include #include #include #include #include #include #include class KCompletion; namespace Plasma { /** * An abstract base class for Plasma Runner plugins * * Be aware that runners have to be thread-safe. This is due to * the fact that each runner is executed in its own thread for * each new term. Thus, a runner may be executed more than once * at the same time. */ class PLASMA_EXPORT AbstractRunner : public QObject { Q_OBJECT public: enum Speed { NormalSpeed, SlowSpeed }; enum Priority { LowestPriority = 0, LowPriority, NormalPriority, HighPriority, HighestPriority }; typedef QList List; /** * Static method is called to load and get a list available of Runners. * * @param whitelist An optional whitelist of runners to load */ static List loadRunners(QObject* parent, const QStringList& whitelist = QStringList() ); /** * Constructs a Runner object. Since AbstractRunner has pure virtuals, * this constructor can not be called directly. Rather a subclass must * be created */ explicit AbstractRunner(QObject* parent = 0); virtual ~AbstractRunner(); /** * Provides access to the runner's configuration object. */ KConfigGroup config() const; /** * This is the main query method. It should trigger creation of * SearchMatch instances through SearchContext::addInformationalMatch, * SearchContext::addExactMatch, and SearchContext::addPossibleMatch. * * If the runner can run precisely the requested term (SearchContext::searchTerm), * it should create an exact match (SearchContext::addExactMatch). * The first runner that creates a SearchMatch will be the * default runner. Other runner's matches will be suggested in the * interface. Non-exact matches should be offered via SearchContext::addPossibleMatch. * * The match will be activated if the user selects it. * * If this runner's exact match is selected, it will be passed into * the exec method. * @see exec * * Since each runner is executed in its own thread there is no need * to return from this method right away, nor to create all matches * here. */ virtual void match(Plasma::SearchContext *search) = 0; void performMatch(Plasma::SearchContext &globalContext); /** * If the runner has options that the user can interact with to modify * what happens when exec or one of the actions created in fillMatches * is called, the runner should return true */ bool hasMatchOptions(); /** * If hasMatchOptions() returns true, this method may be called to get * a widget displaying the options the user can interact with to modify * the behaviour of what happens when a given match is selected. * * @param widget the parent of the options widgets. */ virtual void createMatchOptions(QWidget *widget); /** * If the runner itself has configuration options, this method returns true */ bool isConfigurable(); /** * If isConfigurable() returns true, this method may to get * a widget displaying the options the user can interact with to modify * the behaviour of what happens when a given match is selected. * * @param widget the parent of the options widgets. */ virtual void createConfigurationInterface(QWidget *widget); /** * Called whenever an exact or possible match associated with this * runner is triggered. */ virtual void exec(Plasma::SearchMatch *action); /** * The nominal speed of the runner. * @see setSpeed */ Speed speed() const; // For 4.1 // /** // * The tier of the runner. // * @see setTier // */ // int tier() const; /** * The priority of the runner. * @see setPriority */ Priority priority() const; protected: /** * Sets whether or not the the runner has options for matches */ void setHasMatchOptions(bool hasMatchOptions); /** * Sets whether or not the runner has configuration options itself */ void setIsConfigurable(bool canBeConfigured); /** * Sets the nominal speed of the runner. Only slow runners need * to call this within their constructor because the default * speed is NormalSpeed. Runners that use DBUS should call * this within their constructors. */ void setSpeed(Speed newSpeed); //For 4.1 // /** // * Sets the run tier of the runner. Higher tier runners execute only // * after all lower-level runners execute. Call this method if your runner // * depends on the output of previous runners. // */ // void setTier(int tier); /** * Sets the priority of the runner. Lower priority runners are executed * only after higher priority runners. */ void setPriority(Priority newPriority); /** * A thread safe (blocking) method to do queries of installed Services * * @arg serviceType a service type like "Plasma/Applet" or "KFilePlugin" * @arg constraint a constraint to limie the the choices returned. * @see KServiceTypeTrader::query(const QString&, const QString&) * * @return a list of services that satisfy the query. */ KService::List serviceQuery(const QString &serviceType, const QString &constraint = QString()) const; private: class Private; Private* const d; }; } // Plasma namespace #define K_EXPORT_PLASMA_RUNNER( libname, classname ) \ K_PLUGIN_FACTORY(factory, registerPlugin();) \ K_EXPORT_PLUGIN(factory("plasma_runner_" #libname)) #endif