/*

 * Copyright (C) 2003, 2008 Apple Inc. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. 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.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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. 

 */

#include "config.h"

#include "runtime_method.h"

#include "JSDOMBinding.h"

#include "JSHTMLElement.h"

#include "JSPluginElementFunctions.h"

#include "runtime_object.h"

#include <runtime/Error.h>

#include <runtime/FunctionPrototype.h>

using namespace WebCore;

namespace JSC {

using namespace Bindings;

ASSERT_CLASS_FITS_IN_CELL(RuntimeMethod);

const ClassInfo RuntimeMethod::s_info = { "RuntimeMethod", &InternalFunction::info, 0, 0 };

RuntimeMethod::RuntimeMethod(ExecState* exec, JSGlobalObject* globalObject, const Identifier& ident, Bindings::MethodList& m)

    // FIXME: deprecatedGetDOMStructure uses the prototype off of the wrong global object

    // exec-globalData() is also likely wrong.

    // Callers will need to pass in the right global object corresponding to this native object "m".

    : InternalFunction(&exec->globalData(), globalObject, deprecatedGetDOMStructure<RuntimeMethod>(exec), ident)

    , _methodList(new MethodList(m))

{

}

JSValue RuntimeMethod::lengthGetter(ExecState* exec, JSValue slotBase, const Identifier&)

{

    RuntimeMethod* thisObj = static_cast<RuntimeMethod*>(asObject(slotBase));

    // Ick!  There may be more than one method with this name.  Arbitrarily

    // just pick the first method.  The fundamental problem here is that 

    // JavaScript doesn't have the notion of method overloading and

    // Java does.

    // FIXME: a better solution might be to give the maximum number of parameters

    // of any method

    return jsNumber(exec, thisObj->_methodList->at(0)->numParameters());

}

bool RuntimeMethod::getOwnPropertySlot(ExecState* exec, const Identifier& propertyName, PropertySlot &slot)

{

    if (propertyName == exec->propertyNames().length) {

        slot.setCacheableCustom(this, lengthGetter);

        return true;

    }

    return InternalFunction::getOwnPropertySlot(exec, propertyName, slot);

}

bool RuntimeMethod::getOwnPropertyDescriptor(ExecState* exec, const Identifier& propertyName, PropertyDescriptor &descriptor)

{

    if (propertyName == exec->propertyNames().length) {

        PropertySlot slot;

        slot.setCustom(this, lengthGetter);

        descriptor.setDescriptor(slot.getValue(exec, propertyName), ReadOnly | DontDelete | DontEnum);

        return true;

    }

    return InternalFunction::getOwnPropertyDescriptor(exec, propertyName, descriptor);

}

static EncodedJSValue JSC_HOST_CALL callRuntimeMethod(ExecState* exec)

{

    RuntimeMethod* method = static_cast<RuntimeMethod*>(exec->callee());

    if (method->methods()->isEmpty())

        return JSValue::encode(jsUndefined());

    RefPtr<Instance> instance;

    JSValue thisValue = exec->hostThisValue();

    if (thisValue.inherits(&RuntimeObject::s_info)) {

        RuntimeObject* runtimeObject = static_cast<RuntimeObject*>(asObject(thisValue));

        instance = runtimeObject->getInternalInstance();

        if (!instance) 

            return JSValue::encode(RuntimeObject::throwInvalidAccessError(exec));

    } else {

        // Calling a runtime object of a plugin element?

        if (thisValue.inherits(&JSHTMLElement::s_info)) {

            HTMLElement* element = static_cast<JSHTMLElement*>(asObject(thisValue))->impl();

            instance = pluginInstance(element);

        }

        if (!instance)

            return throwVMTypeError(exec);

    }

    ASSERT(instance);

    instance->begin();

    JSValue result = instance->invokeMethod(exec, method);

    instance->end();

    return JSValue::encode(result);

}

CallType RuntimeMethod::getCallData(CallData& callData)

{

    callData.native.function = callRuntimeMethod;

    return CallTypeHost;

}

}