plasma-framework/scripting/scriptengine.h

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/*
* Copyright 2007 by Aaron Seigo <aseigo@kde.org>
*
* 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 PLASMA_SCRIPTENGINE_H
#define PLASMA_SCRIPTENGINE_H
#include <plasma/plasma_export.h>
#include <plasma/packagestructure.h>
#include <plasma/plasma.h>
#include <QtCore/QObject>
#include <QtCore/QRect>
#include <QtCore/QSizeF>
class QPainter;
class QStyleOptionGraphicsItem;
namespace Plasma
{
class AbstractRunner;
class Applet;
class AppletScript;
class DataEngine;
class DataEngineScript;
class RunnerScript;
class Package;
class ScriptEnginePrivate;
/**
* @brief The base class for scripting interfaces to be used in loading
* plasmoids of a given language.
*
* All ScriptEngines should export as consistent an interface as possible
* so that the learning curve is limited. In particular, the following
* API should be made available in the script environment:
*
* TODO: define the actual scripting APIas ...
* PlasmaApplet - the applet of this plasmoid
* LoadUserInterface(String uiFile) - loads and returns a given UI file
* LoadImage - loads an image resource out of the plasmoid's package
* PlasmaSvg - creates and returns an Svg file
**/
class PLASMA_EXPORT ScriptEngine : public QObject
{
Q_OBJECT
public:
~ScriptEngine();
/**
* Called when it is safe to initialize the internal state of the engine
*/
virtual bool init();
protected:
explicit ScriptEngine(QObject *parent = 0);
/**
* @return absolute path to the main script file for this plasmoid
*/
virtual QString mainScript() const;
/**
* @return the Package associated with this plasmoid which can
* be used to request resources, such as images and
* interface files.
*/
virtual const Package* package() const;
private:
ScriptEnginePrivate * const d;
};
/**
* @arg types a set of ComponentTypes flags for which to look up the
* language support for
* @return a list of all supported languages for the given type(s).
**/
PLASMA_EXPORT QStringList knownLanguages(ComponentTypes types);
/**
* Loads an Applet script engine for the given language.
*
* @param language the language to load for
* @param applet the Plasma::Applet for this script
* @return pointer to the AppletScript or 0 on failure; the caller is responsible
* for the return object which will be parented to the Applet
**/
PLASMA_EXPORT AppletScript* loadScriptEngine(const QString &language, Applet *applet);
/**
* Loads an DataEngine script engine for the given language.
*
* @param language the language to load for
* @param dataEngine the Plasma::DataEngine for this script;
* @return pointer to the DataEngineScript or 0 on failure; the caller is responsible
* for the return object which will be parented to the DataEngine
**/
PLASMA_EXPORT DataEngineScript* loadScriptEngine(const QString &language, DataEngine *dataEngine);
/**
* Loads an Applet script engine for the given language.
*
* @param language the language to load for
* @param runner the Plasma::AbstractRunner for this script
* @return pointer to the RunnerScript or 0 on failure; the caller is responsible
* for the return object which will be parented to the AbstractRunner
**/
PLASMA_EXPORT RunnerScript* loadScriptEngine(const QString &language, AbstractRunner *runner);
/**
* Loads an appropriate PackageStructure for the given language and type
*
* @param langauge the language to load the PackageStructure for
* @param type the component type
* @return a guarded PackageStructure pointer
*/
PLASMA_EXPORT PackageStructure::Ptr packageStructure(const QString &language, ComponentType type);
} // namespace Plasma
#endif