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* Copyright (C) 2011 Apple Inc. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef CallbackFunction_h
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#define CallbackFunction_h
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#include <runtime/JSObject.h>
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class JSDOMGlobalObject;
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enum CallbackAllowedValueFlag {
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CallbackAllowUndefined = 1,
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CallbackAllowNull = 1 << 1
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typedef unsigned CallbackAllowedValueFlags;
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bool checkFunctionOnlyCallback(JSC::ExecState*, JSC::JSValue, CallbackAllowedValueFlags);
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// Creates callback objects for callbacks marked as FunctionOnly in WebIDL.
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template <typename JSCallbackType>
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PassRefPtr<JSCallbackType> createFunctionOnlyCallback(JSC::ExecState* exec, JSDOMGlobalObject* globalObject, JSC::JSValue value, CallbackAllowedValueFlags acceptedValues = 0)
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if (checkFunctionOnlyCallback(exec, value, acceptedValues))
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return JSCallbackType::create(asObject(value), globalObject);
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} // namespace WebCore
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#endif // CallbackFunction_h