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/*
* Copyright (C) 2012 Google, 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 GOOGLE 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.
*/
#ifndef FeatureObserver_h
#define FeatureObserver_h
#include <wtf/Noncopyable.h>
namespace WebCore {
class DOMWindow;
class FeatureObserver {
WTF_MAKE_NONCOPYABLE(FeatureObserver);
public:
FeatureObserver();
~FeatureObserver();
enum Feature {
PageDestruction,
LegacyNotifications,
UnusedSlot01, // Prior to 10/2012, we used this slot for LegacyBlobBuilder.
PrefixedIndexedDB,
WorkerStart,
SharedWorkerStart,
LegacyWebAudio,
WebAudioStart,
PrefixedContentSecurityPolicy,
UnprefixedIndexedDB,
OpenWebDatabase,
LegacyHTMLNotifications,
LegacyTextNotifications,
UnprefixedRequestAnimationFrame,
PrefixedRequestAnimationFrame,
ContentSecurityPolicy,
ContentSecurityPolicyReportOnly,
PrefixedContentSecurityPolicyReportOnly,
// Add new features above this line.
NumberOfFeatures, // This enum value must be last.
};
static void observe(DOMWindow*, Feature);
private:
void didObserve(Feature feature)
{
COMPILE_ASSERT(sizeof(m_featureMask) * 8 >= NumberOfFeatures, FeaturesMustNotOverflowBitmask);
ASSERT(feature != PageDestruction); // PageDestruction is reserved as a scaling factor.
ASSERT(feature < NumberOfFeatures);
m_featureMask |= 1 << static_cast<int>(feature);
}
int m_featureMask;
};
} // namespace WebCore
#endif // FeatureObserver_h
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