/****************************************************************************

**

** Copyright (C) 2010 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.

** $QT_END_LICENSE$

**

****************************************************************************/

#include "config.h"

#include "qscriptfunction_p.h"

#include "private/qscriptengine_p.h"

#include "qscriptcontext.h"

#include "private/qscriptcontext_p.h"

#include "private/qscriptvalue_p.h"

#include "qscriptactivationobject_p.h"

#include "qscriptobject_p.h"

#include "JSGlobalObject.h"

#include "DebuggerCallFrame.h"

#include "Debugger.h"

namespace JSC

{

ASSERT_CLASS_FITS_IN_CELL(QT_PREPEND_NAMESPACE(QScript::FunctionWrapper));

ASSERT_CLASS_FITS_IN_CELL(QT_PREPEND_NAMESPACE(QScript::FunctionWithArgWrapper));

}

QT_BEGIN_NAMESPACE

namespace QScript

{

const JSC::ClassInfo FunctionWrapper::info = { "QtNativeFunctionWrapper", &PrototypeFunction::info, 0, 0 };

const JSC::ClassInfo FunctionWithArgWrapper::info = { "QtNativeFunctionWithArgWrapper", &PrototypeFunction::info, 0, 0 };

FunctionWrapper::FunctionWrapper(JSC::ExecState *exec, int length, const JSC::Identifier &name,

                                 QScriptEngine::FunctionSignature function)

    : JSC::PrototypeFunction(exec, length, name, proxyCall),

      data(new Data())

{

    data->function = function;

}

FunctionWrapper::~FunctionWrapper()

{

    delete data;

}

JSC::ConstructType FunctionWrapper::getConstructData(JSC::ConstructData& consData)

{

    consData.native.function = proxyConstruct;

    consData.native.function.doNotCallDebuggerFunctionExit();

    return JSC::ConstructTypeHost;

}

JSC::JSValue FunctionWrapper::proxyCall(JSC::ExecState *exec, JSC::JSObject *callee,

                                        JSC::JSValue thisObject, const JSC::ArgList &args)

{

    FunctionWrapper *self = static_cast<FunctionWrapper*>(callee);

    QScriptEnginePrivate *eng_p = QScript::scriptEngineFromExec(exec);

    JSC::ExecState *oldFrame = eng_p->currentFrame;

    eng_p->pushContext(exec, thisObject, args, callee);

    QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);

    QScriptValue result = self->data->function(ctx, QScriptEnginePrivate::get(eng_p));

    if (!result.isValid())

        result = QScriptValue(QScriptValue::UndefinedValue);

    eng_p->popContext();

    eng_p->currentFrame = oldFrame;

    return eng_p->scriptValueToJSCValue(result);

}

JSC::JSObject* FunctionWrapper::proxyConstruct(JSC::ExecState *exec, JSC::JSObject *callee,

                                               const JSC::ArgList &args)

{

    FunctionWrapper *self = static_cast<FunctionWrapper*>(callee);

    QScriptEnginePrivate *eng_p = QScript::scriptEngineFromExec(exec);

    JSC::ExecState *oldFrame = eng_p->currentFrame;

    eng_p->pushContext(exec, JSC::JSValue(), args, callee, true);

    QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);

    QScriptValue result = self->data->function(ctx, QScriptEnginePrivate::get(eng_p));

    if (JSC::Debugger* debugger = eng_p->originalGlobalObject()->debugger())

        debugger->functionExit(QScriptValuePrivate::get(result)->jscValue, -1);

    if (!result.isObject())

        result = ctx->thisObject();

    eng_p->popContext();

    eng_p->currentFrame = oldFrame;

    return JSC::asObject(eng_p->scriptValueToJSCValue(result));

}

FunctionWithArgWrapper::FunctionWithArgWrapper(JSC::ExecState *exec, int length, const JSC::Identifier &name,

                                               QScriptEngine::FunctionWithArgSignature function, void *arg)

    : JSC::PrototypeFunction(exec, length, name, proxyCall),

      data(new Data())

{

    data->function = function;

    data->arg = arg;

}

FunctionWithArgWrapper::~FunctionWithArgWrapper()

{

    delete data;

}

JSC::ConstructType FunctionWithArgWrapper::getConstructData(JSC::ConstructData& consData)

{

    consData.native.function = proxyConstruct;

    return JSC::ConstructTypeHost;

}

JSC::JSValue FunctionWithArgWrapper::proxyCall(JSC::ExecState *exec, JSC::JSObject *callee,

                                               JSC::JSValue thisObject, const JSC::ArgList &args)

{

    FunctionWithArgWrapper *self = static_cast<FunctionWithArgWrapper*>(callee);

    QScriptEnginePrivate *eng_p = QScript::scriptEngineFromExec(exec);

    JSC::ExecState *oldFrame = eng_p->currentFrame;

    eng_p->pushContext(exec, thisObject, args, callee);

    QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);

    QScriptValue result = self->data->function(ctx, QScriptEnginePrivate::get(eng_p), self->data->arg);

    eng_p->popContext();

    eng_p->currentFrame = oldFrame;

    return eng_p->scriptValueToJSCValue(result);

}

JSC::JSObject* FunctionWithArgWrapper::proxyConstruct(JSC::ExecState *exec, JSC::JSObject *callee,

                                                      const JSC::ArgList &args)

{

    FunctionWithArgWrapper *self = static_cast<FunctionWithArgWrapper*>(callee);

    QScriptEnginePrivate *eng_p = QScript::scriptEngineFromExec(exec);

    JSC::ExecState *oldFrame = eng_p->currentFrame;

    eng_p->pushContext(exec, JSC::JSValue(), args, callee, true);

    QScriptContext *ctx = eng_p->contextForFrame(eng_p->currentFrame);

    QScriptValue result = self->data->function(ctx, QScriptEnginePrivate::get(eng_p) , self->data->arg);

    if (!result.isObject())

        result = ctx->thisObject();

    eng_p->popContext();

    eng_p->currentFrame = oldFrame;

    return JSC::asObject(eng_p->scriptValueToJSCValue(result));

}

} // namespace QScript

QT_END_NAMESPACE