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/****************************************************************************
**
** Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the $MODULE$ of the Qt Toolkit.
**
** $TROLLTECH_DUAL_LICENSE$
**
****************************************************************************/
#include "qscriptextensionplugin.h"
#ifndef QT_NO_SCRIPT
#include "qscriptvalue.h"
#include "qscriptengine.h"
QT_BEGIN_NAMESPACE
/*!
\since 4.3
\class QScriptExtensionPlugin
\brief The QScriptExtensionPlugin class provides an abstract base for custom QScript extension plugins.
\ingroup plugins
QScriptExtensionPlugin is a plugin interface that makes it
possible to offer extensions that can be loaded dynamically into
applications using the QScriptEngine class.
Writing a script extension plugin is achieved by subclassing this
base class, reimplementing the pure virtual keys() and initialize()
functions, and exporting the class using the Q_EXPORT_PLUGIN2()
macro. See \l {How to Create Qt Plugins} for details.
\sa QScriptEngine::importExtension(), {Creating QtScript Extensions}
*/
/*!
\fn QStringList QScriptExtensionPlugin::keys() const
Returns the list of keys this plugin supports.
These keys are usually the names of the "modules" or "packages"
that are implemented in the plugin (e.g. \c{com.mycompany.MyProduct}).
\sa initialize()
*/
/*!
\fn void QScriptExtensionPlugin::initialize(const QString& key, QScriptEngine *engine)
Initializes the extension specified by \a key in the given \a engine.
The key must come from the set of keys().
\sa keys()
*/
/*!
Constructs a script extension plugin with the given \a parent.
Note that this constructor is invoked automatically by the
Q_EXPORT_PLUGIN2() macro, so there is no need for calling it
explicitly.
*/
QScriptExtensionPlugin::QScriptExtensionPlugin(QObject *parent)
: QObject(parent)
{
}
/*!
Destroys the script extension plugin.
Note that Qt destroys a plugin automatically when it is no longer
used, so there is no need for calling the destructor explicitly.
*/
QScriptExtensionPlugin::~QScriptExtensionPlugin()
{
}
/*!
This function is provided for convenience when reimplementing
initialize(). It splits the given \a key on \c{'.'} (dot), and
ensures that there's a corresponding path of objects in the
environment of the given \a engine, creating new objects to complete
the path if necessary. E.g. if the key is "com.trolltech", after
the call to setupPackage() the script expression \c{com.trolltech}
will evaluate to an object. More specifically, the engine's Global
Object will have a property called "com", which in turn has a
property called "trolltech".
Use this function to avoid global namespace pollution when installing
your extensions in the engine.
\sa initialize()
*/
QScriptValue QScriptExtensionPlugin::setupPackage(
const QString &key, QScriptEngine *engine) const
{
QStringList components = key.split(QLatin1Char('.'));
QScriptValue o = engine->globalObject();
for (int i = 0; i < components.count(); ++i) {
QScriptValue oo = o.property(components.at(i));
if (!oo.isValid()) {
oo = engine->newObject();
o.setProperty(components.at(i), oo);
}
o = oo;
}
return o;
}
QT_END_NAMESPACE
#endif // QT_NO_SCRIPT
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