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/*
* Copyright (C) 2011 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT
* OWNER 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.
*/
#pragma once
#include "GCReachableRef.h"
#include "MutationObserver.h"
#include <wtf/CheckedRef.h>
#include <wtf/RobinHoodHashSet.h>
#include <wtf/TZoneMalloc.h>
#include <wtf/WeakPtr.h>
#include <wtf/text/AtomString.h>
#include <wtf/text/AtomStringHash.h>
namespace WebCore {
class MutationObserverRegistration;
}
namespace WTF {
template<typename T> struct IsDeprecatedWeakRefSmartPointerException;
template<> struct IsDeprecatedWeakRefSmartPointerException<WebCore::MutationObserverRegistration> : std::true_type { };
}
namespace JSC {
class AbstractSlotVisitor;
}
namespace WebCore {
class QualifiedName;
class MutationObserverRegistration : public CanMakeWeakPtr<MutationObserverRegistration> {
WTF_MAKE_TZONE_ALLOCATED(MutationObserverRegistration);
public:
MutationObserverRegistration(MutationObserver&, Node&, MutationObserverOptions, const MemoryCompactLookupOnlyRobinHoodHashSet<AtomString>& attributeFilter);
~MutationObserverRegistration();
void resetObservation(MutationObserverOptions, const MemoryCompactLookupOnlyRobinHoodHashSet<AtomString>& attributeFilter);
void observedSubtreeNodeWillDetach(Node&);
UncheckedKeyHashSet<GCReachableRef<Node>> takeTransientRegistrations();
bool hasTransientRegistrations() const { return !m_transientRegistrationNodes.isEmpty(); }
bool shouldReceiveMutationFrom(Node&, MutationObserverOptionType, const QualifiedName* attributeName) const;
bool isSubtree() const { return m_options.contains(MutationObserverOptionType::Subtree); }
MutationObserver& observer() { return m_observer.get(); }
Ref<MutationObserver> protectedObserver() { return m_observer; }
Node& node() { return m_node; }
MutationRecordDeliveryOptions deliveryOptions() const { return m_options & MutationObserver::AllDeliveryFlags; }
MutationObserverOptions mutationTypes() const { return m_options & MutationObserver::AllMutationTypes; }
bool isReachableFromOpaqueRoots(JSC::AbstractSlotVisitor&) const;
private:
Ref<MutationObserver> m_observer;
WeakRef<Node, WeakPtrImplWithEventTargetData> m_node;
RefPtr<Node> m_nodeKeptAlive;
UncheckedKeyHashSet<GCReachableRef<Node>> m_transientRegistrationNodes;
MutationObserverOptions m_options;
MemoryCompactLookupOnlyRobinHoodHashSet<AtomString> m_attributeFilter;
};
} // namespace WebCore
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