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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Solutions component.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
** of its contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qscriptextensionplugin.h"
#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
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