1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/*
* 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 MutationObserver_h
#define MutationObserver_h
#include "base/gtest_prod_util.h"
#include "bindings/core/v8/ScriptWrappable.h"
#include "core/CoreExport.h"
#include "platform/heap/Handle.h"
#include "wtf/HashSet.h"
#include "wtf/Vector.h"
namespace blink {
class Document;
class ExceptionState;
class HTMLSlotElement;
class MutationCallback;
class MutationObserver;
class MutationObserverInit;
class MutationObserverRegistration;
class MutationRecord;
class Node;
typedef unsigned char MutationObserverOptions;
typedef unsigned char MutationRecordDeliveryOptions;
using MutationObserverSet = HeapHashSet<Member<MutationObserver>>;
using MutationObserverRegistrationSet =
HeapHashSet<WeakMember<MutationObserverRegistration>>;
using MutationObserverVector = HeapVector<Member<MutationObserver>>;
using MutationRecordVector = HeapVector<Member<MutationRecord>>;
class CORE_EXPORT MutationObserver final
: public GarbageCollectedFinalized<MutationObserver>,
public ScriptWrappable {
DEFINE_WRAPPERTYPEINFO();
public:
enum MutationType {
ChildList = 1 << 0,
Attributes = 1 << 1,
CharacterData = 1 << 2,
AllMutationTypes = ChildList | Attributes | CharacterData
};
enum ObservationFlags { Subtree = 1 << 3, AttributeFilter = 1 << 4 };
enum DeliveryFlags {
AttributeOldValue = 1 << 5,
CharacterDataOldValue = 1 << 6,
};
static MutationObserver* create(MutationCallback*);
static void resumeSuspendedObservers();
static void deliverMutations();
static void enqueueSlotChange(HTMLSlotElement&);
static void cleanSlotChangeList(Document&);
~MutationObserver();
void observe(Node*, const MutationObserverInit&, ExceptionState&);
MutationRecordVector takeRecords();
void disconnect();
void observationStarted(MutationObserverRegistration*);
void observationEnded(MutationObserverRegistration*);
void enqueueMutationRecord(MutationRecord*);
void setHasTransientRegistration();
HeapHashSet<Member<Node>> getObservedNodes() const;
// Eagerly finalized as destructor accesses heap object members.
EAGERLY_FINALIZE();
DECLARE_TRACE();
private:
struct ObserverLessThan;
explicit MutationObserver(MutationCallback*);
void deliver();
bool shouldBeSuspended() const;
void cancelInspectorAsyncTasks();
Member<MutationCallback> m_callback;
MutationRecordVector m_records;
MutationObserverRegistrationSet m_registrations;
unsigned m_priority;
FRIEND_TEST_ALL_PREFIXES(MutationObserverTest, DisconnectCrash);
};
} // namespace blink
#endif // MutationObserver_h
|
