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1 /* | 1 /* |
2 * Copyright (C) 2011 Google Inc. All rights reserved. | 2 * Copyright (C) 2011 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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34 #include "core/dom/Document.h" | 34 #include "core/dom/Document.h" |
35 #include "core/dom/MutationObserver.h" | 35 #include "core/dom/MutationObserver.h" |
36 #include "core/dom/Node.h" | 36 #include "core/dom/Node.h" |
37 #include "platform/heap/Handle.h" | 37 #include "platform/heap/Handle.h" |
38 #include "wtf/Noncopyable.h" | 38 #include "wtf/Noncopyable.h" |
39 | 39 |
40 namespace blink { | 40 namespace blink { |
41 | 41 |
42 class MutationObserverInterestGroup; | 42 class MutationObserverInterestGroup; |
43 | 43 |
44 // ChildListMutationAccumulator is not meant to be used directly; ChildListMutat
ionScope is the public interface. | 44 // ChildListMutationAccumulator is not meant to be used directly; |
| 45 // ChildListMutationScope is the public interface. |
45 // | 46 // |
46 // One ChildListMutationAccumulator for a given Node is shared between all the | 47 // One ChildListMutationAccumulator for a given Node is shared between all the |
47 // active ChildListMutationScopes for that Node. Once the last ChildListMutation
Scope | 48 // active ChildListMutationScopes for that Node. Once the last |
48 // is destructed the accumulator enqueues a mutation record for the recorded | 49 // ChildListMutationScope is destructed the accumulator enqueues a mutation |
49 // mutations and the accumulator can be garbage collected. | 50 // record for the recorded mutations and the accumulator can be garbage |
| 51 // collected. |
50 class ChildListMutationAccumulator final | 52 class ChildListMutationAccumulator final |
51 : public GarbageCollected<ChildListMutationAccumulator> { | 53 : public GarbageCollected<ChildListMutationAccumulator> { |
52 public: | 54 public: |
53 static ChildListMutationAccumulator* getOrCreate(Node&); | 55 static ChildListMutationAccumulator* getOrCreate(Node&); |
54 | 56 |
55 void childAdded(Node*); | 57 void childAdded(Node*); |
56 void willRemoveChild(Node*); | 58 void willRemoveChild(Node*); |
57 | 59 |
58 bool hasObservers() const { return m_observers; } | 60 bool hasObservers() const { return m_observers; } |
59 | 61 |
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117 m_accumulator->willRemoveChild(&child); | 119 m_accumulator->willRemoveChild(&child); |
118 } | 120 } |
119 | 121 |
120 private: | 122 private: |
121 Member<ChildListMutationAccumulator> m_accumulator; | 123 Member<ChildListMutationAccumulator> m_accumulator; |
122 }; | 124 }; |
123 | 125 |
124 } // namespace blink | 126 } // namespace blink |
125 | 127 |
126 #endif // ChildListMutationScope_h | 128 #endif // ChildListMutationScope_h |
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