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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.
*/
#ifndef MutationObserverRegistration_h
#define MutationObserverRegistration_h
#include "bindings/core/v8/ScriptWrappable.h"
#include "bindings/core/v8/TraceWrapperMember.h"
#include "core/CoreExport.h"
#include "core/dom/MutationObserver.h"
#include "platform/heap/Handle.h"
#include "wtf/HashSet.h"
#include "wtf/text/AtomicString.h"
#include "wtf/text/AtomicStringHash.h"
namespace blink {
class QualifiedName;
class CORE_EXPORT MutationObserverRegistration final
: public GarbageCollectedFinalized<MutationObserverRegistration>,
public TraceWrapperBase {
public:
static MutationObserverRegistration* create(
MutationObserver&,
Node*,
MutationObserverOptions,
const HashSet<AtomicString>& attributeFilter);
~MutationObserverRegistration();
void resetObservation(MutationObserverOptions,
const HashSet<AtomicString>& attributeFilter);
void observedSubtreeNodeWillDetach(Node&);
void clearTransientRegistrations();
bool hasTransientRegistrations() const {
return m_transientRegistrationNodes &&
!m_transientRegistrationNodes->isEmpty();
}
void unregister();
bool shouldReceiveMutationFrom(Node&,
MutationObserver::MutationType,
const QualifiedName* attributeName) const;
bool isSubtree() const { return m_options & MutationObserver::Subtree; }
MutationObserver& observer() const { return *m_observer; }
MutationRecordDeliveryOptions deliveryOptions() const {
return m_options & (MutationObserver::AttributeOldValue |
MutationObserver::CharacterDataOldValue);
}
MutationObserverOptions mutationTypes() const {
return m_options & MutationObserver::AllMutationTypes;
}
void addRegistrationNodesToSet(HeapHashSet<Member<Node>>&) const;
void dispose();
DECLARE_TRACE();
DECLARE_VIRTUAL_TRACE_WRAPPERS();
private:
MutationObserverRegistration(MutationObserver&,
Node*,
MutationObserverOptions,
const HashSet<AtomicString>& attributeFilter);
TraceWrapperMember<MutationObserver> m_observer;
WeakMember<Node> m_registrationNode;
Member<Node> m_registrationNodeKeepAlive;
typedef HeapHashSet<Member<Node>> NodeHashSet;
Member<NodeHashSet> m_transientRegistrationNodes;
MutationObserverOptions m_options;
HashSet<AtomicString> m_attributeFilter;
};
} // namespace blink
#endif // MutationObserverRegistration_h
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