1/*
2 * Copyright (C) 2011 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#ifndef CallbackUtilities_h
26#define CallbackUtilities_h
27
28#include "ExceptionCode.h"
29#include <runtime/JSFunction.h>
30#include <wtf/Forward.h>
31
32namespace WebCore {
33
34enum CallbackAllowedValueFlag {
35 CallbackAllowFunction = 0,
36 CallbackAllowUndefined = 1,
37 CallbackAllowNull = 1 << 1
38};
39
40typedef unsigned CallbackAllowedValueFlags;
41
42// 'FunctionOnly' is assumed for the created callback. Callable objects created via JSC API are disallowed.
43template <typename JSCallbackType>
44PassRefPtr<JSCallbackType> createFunctionOnlyCallback(JSC::ExecState* exec, JSDOMGlobalObject* globalObject, JSC::JSValue value, CallbackAllowedValueFlags acceptedValues)
45{
46 if ((value.isUndefined() && (acceptedValues & CallbackAllowUndefined))
47 || (value.isNull() && (acceptedValues & CallbackAllowNull)))
48 return 0;
49
50 if (!value.inherits(&JSC::JSFunction::s_info)) {
51 setDOMException(exec, TYPE_MISMATCH_ERR);
52 return 0;
53 }
54
55 JSC::JSObject* object = asObject(value);
56 return JSCallbackType::create(object, globalObject);
57}
58
59} // namespace WebCore
60
61#endif // CallbackUtilities_h