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
166
|
// Copyright (c) 2011 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 "components/prefs/pref_value_map.h"
#include <limits.h>
#include <map>
#include <memory>
#include <utility>
#include "base/values.h"
PrefValueMap::PrefValueMap() {}
PrefValueMap::~PrefValueMap() {}
bool PrefValueMap::GetValue(const std::string& key,
const base::Value** value) const {
auto it = prefs_.find(key);
if (it == prefs_.end())
return false;
if (value)
*value = &it->second;
return true;
}
bool PrefValueMap::GetValue(const std::string& key, base::Value** value) {
auto it = prefs_.find(key);
if (it == prefs_.end())
return false;
if (value)
*value = &it->second;
return true;
}
bool PrefValueMap::SetValue(const std::string& key, base::Value value) {
base::Value& existing_value = prefs_[key];
if (value == existing_value)
return false;
existing_value = std::move(value);
return true;
}
bool PrefValueMap::RemoveValue(const std::string& key) {
return prefs_.erase(key) != 0;
}
void PrefValueMap::Clear() {
prefs_.clear();
}
void PrefValueMap::ClearWithPrefix(const std::string& prefix) {
Map::iterator low = prefs_.lower_bound(prefix);
// Appending maximum possible character so that there will be no string with
// prefix |prefix| that we may miss.
Map::iterator high = prefs_.upper_bound(prefix + char(CHAR_MAX));
prefs_.erase(low, high);
}
void PrefValueMap::Swap(PrefValueMap* other) {
prefs_.swap(other->prefs_);
}
PrefValueMap::iterator PrefValueMap::begin() {
return prefs_.begin();
}
PrefValueMap::iterator PrefValueMap::end() {
return prefs_.end();
}
PrefValueMap::const_iterator PrefValueMap::begin() const {
return prefs_.begin();
}
PrefValueMap::const_iterator PrefValueMap::end() const {
return prefs_.end();
}
bool PrefValueMap::empty() const {
return prefs_.empty();
}
bool PrefValueMap::GetBoolean(const std::string& key, bool* value) const {
const base::Value* stored_value = nullptr;
return GetValue(key, &stored_value) && stored_value->GetAsBoolean(value);
}
void PrefValueMap::SetBoolean(const std::string& key, bool value) {
SetValue(key, base::Value(value));
}
bool PrefValueMap::GetString(const std::string& key, std::string* value) const {
const base::Value* stored_value = nullptr;
return GetValue(key, &stored_value) && stored_value->GetAsString(value);
}
void PrefValueMap::SetString(const std::string& key, const std::string& value) {
SetValue(key, base::Value(value));
}
bool PrefValueMap::GetInteger(const std::string& key, int* value) const {
const base::Value* stored_value = nullptr;
return GetValue(key, &stored_value) && stored_value->GetAsInteger(value);
}
void PrefValueMap::SetInteger(const std::string& key, const int value) {
SetValue(key, base::Value(value));
}
void PrefValueMap::SetDouble(const std::string& key, const double value) {
SetValue(key, base::Value(value));
}
void PrefValueMap::GetDifferingKeys(
const PrefValueMap* other,
std::vector<std::string>* differing_keys) const {
differing_keys->clear();
// Put everything into ordered maps.
std::map<std::string, const base::Value*> this_prefs;
std::map<std::string, const base::Value*> other_prefs;
for (const auto& pair : prefs_)
this_prefs.emplace(pair.first, &pair.second);
for (const auto& pair : other->prefs_)
other_prefs.emplace(pair.first, &pair.second);
// Walk over the maps in lockstep, adding everything that is different.
auto this_pref = this_prefs.begin();
auto other_pref = other_prefs.begin();
while (this_pref != this_prefs.end() && other_pref != other_prefs.end()) {
const int diff = this_pref->first.compare(other_pref->first);
if (diff == 0) {
if (!this_pref->second->Equals(other_pref->second))
differing_keys->push_back(this_pref->first);
++this_pref;
++other_pref;
} else if (diff < 0) {
differing_keys->push_back(this_pref->first);
++this_pref;
} else if (diff > 0) {
differing_keys->push_back(other_pref->first);
++other_pref;
}
}
// Add the remaining entries.
for (; this_pref != this_prefs.end(); ++this_pref)
differing_keys->push_back(this_pref->first);
for (; other_pref != other_prefs.end(); ++other_pref)
differing_keys->push_back(other_pref->first);
}
std::unique_ptr<base::DictionaryValue> PrefValueMap::AsDictionaryValue() const {
auto dictionary = std::make_unique<base::DictionaryValue>();
for (const auto& value : prefs_)
dictionary->Set(value.first, value.second.CreateDeepCopy());
return dictionary;
}
|
