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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/prefs/tracked/segregated_pref_store.h"
#include "base/logging.h"
#include "base/stl_util.h"
#include "base/values.h"
SegregatedPrefStore::AggregatingObserver::AggregatingObserver(
SegregatedPrefStore* outer)
: outer_(outer),
failed_sub_initializations_(0),
successful_sub_initializations_(0) {}
void SegregatedPrefStore::AggregatingObserver::OnPrefValueChanged(
const std::string& key) {
// There is no need to tell clients about changes if they have not yet been
// told about initialization.
if (failed_sub_initializations_ + successful_sub_initializations_ < 2)
return;
FOR_EACH_OBSERVER(
PrefStore::Observer, outer_->observers_, OnPrefValueChanged(key));
}
void SegregatedPrefStore::AggregatingObserver::OnInitializationCompleted(
bool succeeded) {
if (succeeded)
++successful_sub_initializations_;
else
++failed_sub_initializations_;
DCHECK_LE(failed_sub_initializations_ + successful_sub_initializations_, 2);
if (failed_sub_initializations_ + successful_sub_initializations_ == 2) {
if (successful_sub_initializations_ == 2 && outer_->read_error_delegate_) {
PersistentPrefStore::PrefReadError read_error = outer_->GetReadError();
if (read_error != PersistentPrefStore::PREF_READ_ERROR_NONE)
outer_->read_error_delegate_->OnError(read_error);
}
FOR_EACH_OBSERVER(
PrefStore::Observer,
outer_->observers_,
OnInitializationCompleted(successful_sub_initializations_ == 2));
}
}
SegregatedPrefStore::SegregatedPrefStore(
const scoped_refptr<PersistentPrefStore>& default_pref_store,
const scoped_refptr<PersistentPrefStore>& selected_pref_store,
const std::set<std::string>& selected_pref_names)
: default_pref_store_(default_pref_store),
selected_pref_store_(selected_pref_store),
selected_preference_names_(selected_pref_names),
aggregating_observer_(this) {
default_pref_store_->AddObserver(&aggregating_observer_);
selected_pref_store_->AddObserver(&aggregating_observer_);
}
void SegregatedPrefStore::AddObserver(Observer* observer) {
observers_.AddObserver(observer);
}
void SegregatedPrefStore::RemoveObserver(Observer* observer) {
observers_.RemoveObserver(observer);
}
bool SegregatedPrefStore::HasObservers() const {
return observers_.might_have_observers();
}
bool SegregatedPrefStore::IsInitializationComplete() const {
return default_pref_store_->IsInitializationComplete() &&
selected_pref_store_->IsInitializationComplete();
}
bool SegregatedPrefStore::GetValue(const std::string& key,
const base::Value** result) const {
return StoreForKey(key)->GetValue(key, result);
}
void SegregatedPrefStore::SetValue(const std::string& key, base::Value* value) {
StoreForKey(key)->SetValue(key, value);
}
void SegregatedPrefStore::RemoveValue(const std::string& key) {
StoreForKey(key)->RemoveValue(key);
}
bool SegregatedPrefStore::GetMutableValue(const std::string& key,
base::Value** result) {
return StoreForKey(key)->GetMutableValue(key, result);
}
void SegregatedPrefStore::ReportValueChanged(const std::string& key) {
StoreForKey(key)->ReportValueChanged(key);
}
void SegregatedPrefStore::SetValueSilently(const std::string& key,
base::Value* value) {
StoreForKey(key)->SetValueSilently(key, value);
}
bool SegregatedPrefStore::ReadOnly() const {
return selected_pref_store_->ReadOnly() ||
default_pref_store_->ReadOnly();
}
PersistentPrefStore::PrefReadError SegregatedPrefStore::GetReadError() const {
PersistentPrefStore::PrefReadError read_error =
default_pref_store_->GetReadError();
if (read_error == PersistentPrefStore::PREF_READ_ERROR_NONE) {
read_error = selected_pref_store_->GetReadError();
// Ignore NO_FILE from selected_pref_store_.
if (read_error == PersistentPrefStore::PREF_READ_ERROR_NO_FILE)
read_error = PersistentPrefStore::PREF_READ_ERROR_NONE;
}
return read_error;
}
PersistentPrefStore::PrefReadError SegregatedPrefStore::ReadPrefs() {
// Note: Both of these stores own PrefFilters which makes ReadPrefs
// asynchronous. This is okay in this case as only the first call will be
// truly asynchronous, the second call will then unblock the migration in
// TrackedPreferencesMigrator and complete synchronously.
default_pref_store_->ReadPrefs();
PersistentPrefStore::PrefReadError selected_store_read_error =
selected_pref_store_->ReadPrefs();
DCHECK_NE(PersistentPrefStore::PREF_READ_ERROR_ASYNCHRONOUS_TASK_INCOMPLETE,
selected_store_read_error);
return GetReadError();
}
void SegregatedPrefStore::ReadPrefsAsync(ReadErrorDelegate* error_delegate) {
read_error_delegate_.reset(error_delegate);
default_pref_store_->ReadPrefsAsync(NULL);
selected_pref_store_->ReadPrefsAsync(NULL);
}
void SegregatedPrefStore::CommitPendingWrite() {
default_pref_store_->CommitPendingWrite();
selected_pref_store_->CommitPendingWrite();
}
SegregatedPrefStore::~SegregatedPrefStore() {
default_pref_store_->RemoveObserver(&aggregating_observer_);
selected_pref_store_->RemoveObserver(&aggregating_observer_);
}
PersistentPrefStore* SegregatedPrefStore::StoreForKey(const std::string& key) {
return (ContainsKey(selected_preference_names_, key)
? selected_pref_store_
: default_pref_store_).get();
}
const PersistentPrefStore* SegregatedPrefStore::StoreForKey(
const std::string& key) const {
return (ContainsKey(selected_preference_names_, key)
? selected_pref_store_
: default_pref_store_).get();
}
|
