2 * Copyright (C) 2011 Google Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #ifndef MutationObserverRegistration_h
32 #define MutationObserverRegistration_h
34 #include "MutationObserver.h"
35 #include <wtf/HashSet.h>
36 #include <wtf/text/AtomicString.h>
37 #include <wtf/text/AtomicStringHash.h>
43 class MutationObserverRegistration {
45 static PassOwnPtr<MutationObserverRegistration> create(PassRefPtr<MutationObserver>, Node*, MutationObserverOptions, const HashSet<AtomicString>& attributeFilter);
46 ~MutationObserverRegistration();
48 void resetObservation(MutationObserverOptions, const HashSet<AtomicString>& attributeFilter);
49 void observedSubtreeNodeWillDetach(Node*);
50 void clearTransientRegistrations();
51 bool hasTransientRegistrations() const { return m_transientRegistrationNodes && !m_transientRegistrationNodes->isEmpty(); }
54 bool shouldReceiveMutationFrom(Node*, MutationObserver::MutationType, const QualifiedName* attributeName) const;
55 bool isSubtree() const { return m_options & MutationObserver::Subtree; }
57 MutationObserver* observer() const { return m_observer.get(); }
58 MutationRecordDeliveryOptions deliveryOptions() const { return m_options & (MutationObserver::AttributeOldValue | MutationObserver::CharacterDataOldValue); }
59 MutationObserverOptions mutationTypes() const { return m_options & MutationObserver::AllMutationTypes; }
61 void addRegistrationNodesToSet(HashSet<Node*>&) const;
64 MutationObserverRegistration(PassRefPtr<MutationObserver>, Node*, MutationObserverOptions, const HashSet<AtomicString>& attributeFilter);
66 RefPtr<MutationObserver> m_observer;
67 Node* m_registrationNode;
68 RefPtr<Node> m_registrationNodeKeepAlive;
69 typedef HashSet<RefPtr<Node> > NodeHashSet;
70 OwnPtr<NodeHashSet> m_transientRegistrationNodes;
72 MutationObserverOptions m_options;
73 HashSet<AtomicString> m_attributeFilter;
76 } // namespace WebCore
78 #endif // MutationObserverRegistration_h