JavaScriptCore/API/JSCallbackFunction.cpp

// -*- mode: c++; c-basic-offset: 4 -*-
/*
 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
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 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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#include "config.h"
#include <wtf/Platform.h>
#include "JSCallbackFunction.h"

#include "APICast.h"
#include "function.h"
#include "function_object.h"
#include <kjs/JSGlobalObject.h>
#include <wtf/Vector.h>

namespace KJS {

const ClassInfo JSCallbackFunction::info = { "CallbackFunction", &InternalFunctionImp::info, 0};

JSCallbackFunction::JSCallbackFunction(ExecState* exec, JSObjectCallAsFunctionCallback callback, const Identifier& name)
    : InternalFunctionImp(exec->lexicalGlobalObject()->functionPrototype(), name)
    , m_callback(callback)
{
}

// InternalFunctionImp mish-mashes constructor and function behavior -- we should 
// refactor the code so this override isn't necessary
bool JSCallbackFunction::implementsHasInstance() const { 
    return false; 
}

JSValue* JSCallbackFunction::callAsFunction(ExecState* exec, JSObject* thisObj, const List &args)
{
    JSContextRef execRef = toRef(exec);
    JSObjectRef thisRef = toRef(this);
    JSObjectRef thisObjRef = toRef(thisObj);

    int argumentCount = static_cast<int>(args.size());
    Vector<JSValueRef, 16> arguments(argumentCount);
    for (int i = 0; i < argumentCount; i++)
        arguments[i] = toRef(args[i]);

    JSLock::DropAllLocks dropAllLocks;
    return toJS(m_callback(execRef, thisRef, thisObjRef, argumentCount, arguments.data(), toRef(exec->exceptionSlot())));
}

} // namespace KJS