MutationObserverRegistration.h [plain text]
#pragma once
#include "GCReachableRef.h"
#include "MutationObserver.h"
#include <wtf/HashSet.h>
#include <wtf/text/AtomString.h>
#include <wtf/text/AtomStringHash.h>
namespace WebCore {
class QualifiedName;
class MutationObserverRegistration {
WTF_MAKE_FAST_ALLOCATED;
public:
MutationObserverRegistration(MutationObserver&, Node&, MutationObserverOptions, const HashSet<AtomString>& attributeFilter);
~MutationObserverRegistration();
void resetObservation(MutationObserverOptions, const HashSet<AtomString>& attributeFilter);
void observedSubtreeNodeWillDetach(Node&);
std::unique_ptr<HashSet<GCReachableRef<Node>>> takeTransientRegistrations();
bool hasTransientRegistrations() const { return m_transientRegistrationNodes && !m_transientRegistrationNodes->isEmpty(); }
bool shouldReceiveMutationFrom(Node&, MutationObserver::MutationType, const QualifiedName* attributeName) const;
bool isSubtree() const { return m_options & MutationObserver::Subtree; }
MutationObserver& observer() { return m_observer.get(); }
Node& node() { return m_node; }
MutationRecordDeliveryOptions deliveryOptions() const { return m_options & (MutationObserver::AttributeOldValue | MutationObserver::CharacterDataOldValue); }
MutationObserverOptions mutationTypes() const { return m_options & MutationObserver::AllMutationTypes; }
void addRegistrationNodesToSet(HashSet<Node*>&) const;
private:
Ref<MutationObserver> m_observer;
Node& m_node;
RefPtr<Node> m_nodeKeptAlive;
std::unique_ptr<HashSet<GCReachableRef<Node>>> m_transientRegistrationNodes;
MutationObserverOptions m_options;
HashSet<AtomString> m_attributeFilter;
};
}