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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/*
* 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 THIRD_PARTY_BLINK_RENDERER_CORE_DOM_MUTATION_OBSERVER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_DOM_MUTATION_OBSERVER_H_
#include "base/gtest_prod_util.h"
#include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h"
#include "third_party/blink/renderer/core/core_export.h"
#include "third_party/blink/renderer/core/dom/context_lifecycle_observer.h"
#include "third_party/blink/renderer/core/dom/mutation_observer_options.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/platform/bindings/name_client.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/bindings/trace_wrapper_member.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/wtf/hash_set.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"
namespace blink {
class Document;
class ExceptionState;
class HTMLSlotElement;
class MutationObserver;
class MutationObserverInit;
class MutationObserverRegistration;
class MutationRecord;
class Node;
class ScriptState;
class V8MutationCallback;
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 ScriptWrappable,
public ActiveScriptWrappable<MutationObserver>,
public ContextClient {
DEFINE_WRAPPERTYPEINFO();
USING_GARBAGE_COLLECTED_MIXIN(MutationObserver);
public:
enum ObservationFlags { kSubtree = 1 << 3, kAttributeFilter = 1 << 4 };
enum DeliveryFlags {
kAttributeOldValue = 1 << 5,
kCharacterDataOldValue = 1 << 6,
};
class CORE_EXPORT Delegate : public GarbageCollectedFinalized<Delegate>,
public NameClient {
public:
virtual ~Delegate() = default;
virtual ExecutionContext* GetExecutionContext() const = 0;
virtual void Deliver(const MutationRecordVector& records,
MutationObserver&) = 0;
virtual void Trace(Visitor* visitor) {}
const char* NameInHeapSnapshot() const override {
return "MutationObserver::Delegate";
}
};
class CORE_EXPORT V8DelegateImpl;
static MutationObserver* Create(Delegate*);
static MutationObserver* Create(ScriptState*, V8MutationCallback*);
static void ResumeSuspendedObservers();
static void DeliverMutations();
static void EnqueueSlotChange(HTMLSlotElement&);
static void CleanSlotChangeList(Document&);
MutationObserver(ExecutionContext*, Delegate*);
~MutationObserver() override;
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;
bool HasPendingActivity() const override { return !records_.IsEmpty(); }
// Eagerly finalized as destructor accesses heap object members.
EAGERLY_FINALIZE();
void Trace(Visitor*) override;
private:
struct ObserverLessThan;
void Deliver();
bool ShouldBeSuspended() const;
void CancelInspectorAsyncTasks();
TraceWrapperMember<Delegate> delegate_;
HeapVector<TraceWrapperMember<MutationRecord>> records_;
MutationObserverRegistrationSet registrations_;
unsigned priority_;
FRIEND_TEST_ALL_PREFIXES(MutationObserverTest, DisconnectCrash);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_CORE_DOM_MUTATION_OBSERVER_H_
|
