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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtScript module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL-ONLY$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QSCRIPTFUNCTION_P_H
#define QSCRIPTFUNCTION_P_H
#include "qscriptengine.h"
#include "qscriptengine_p.h"
#include "qscriptvalue.h"
#include "qscriptvalue_p.h"
#include "qscriptqobject_p.h"
QT_BEGIN_NAMESPACE
struct QScriptNativeFunctionData : public QtDataBase
{
QScriptNativeFunctionData(QScriptEnginePrivate *engine, QScriptEngine::FunctionSignature fun)
: QtDataBase(engine)
, fun(fun)
{
}
QScriptValue call(QScriptContext *scriptContext)
{
return fun(scriptContext, QScriptEnginePrivate::get(engine()));
}
QScriptEngine::FunctionSignature fun;
};
struct QScriptNativeFunctionWithArgData : public QtDataBase
{
QScriptNativeFunctionWithArgData(QScriptEnginePrivate *engine, QScriptEngine::FunctionWithArgSignature fun, void *arg)
: QtDataBase(engine)
, fun(fun)
, arg(arg)
{
}
QScriptValue call(QScriptContext *scriptContext)
{
return fun(scriptContext, QScriptEnginePrivate::get(engine()), arg);
}
QScriptEngine::FunctionWithArgSignature fun;
void *arg;
};
template <typename T>
void QtNativeFunctionCleanup(v8::Persistent<v8::Value> object, void *parameter)
{
T *data = reinterpret_cast<T *>(parameter);
delete data;
object.Dispose();
object.Clear();
}
template <typename T>
v8::Handle<v8::Value> QtNativeFunctionCallback(const v8::Arguments& arguments)
{
v8::HandleScope handleScope;
v8::Handle<v8::External> wrap = v8::Handle<v8::External>::Cast(arguments.Data());
T *data = reinterpret_cast<T *>(wrap->Value());
QScriptEnginePrivate *engine = data->engine();
QScriptContextPrivate qScriptContext(engine, &arguments);
// When 'v' gets out of scope, it'll delete 'result'.
QScriptValue v = data->call(&qScriptContext);
QScriptValuePrivate *result = QScriptValuePrivate::get(v);
if (!result->isValid()) {
return handleScope.Close(engine->makeJSValue(QScriptValue::UndefinedValue));
}
// Make sure that the result will be assigned to the correct engine.
if (!result->engine()) {
result->assignEngine(engine);
} else if (result->engine() != engine) {
qWarning("QScriptValue::call(): Value from different engine returned from native function, returning undefined value instead.");
return handleScope.Close(engine->makeJSValue(QScriptValue::UndefinedValue));
}
// The persistent handle within the 'result' will be deleted, but
// we let its value escape to the outer scope.
return handleScope.Close(v8::Handle<v8::Value>(*result));
}
QT_END_NAMESPACE
#endif // QSCRIPTFUNCTION_P_H
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