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Side by Side Diff: base/prefs/pref_value_map.cc

Issue 1648403002: Move base/prefs to components/prefs (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 4 years, 10 months ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "base/prefs/pref_value_map.h"
6
7 #include <map>
8 #include <utility>
9
10 #include "base/logging.h"
11 #include "base/memory/scoped_ptr.h"
12 #include "base/stl_util.h"
13 #include "base/values.h"
14
15 PrefValueMap::PrefValueMap() {}
16
17 PrefValueMap::~PrefValueMap() {}
18
19 bool PrefValueMap::GetValue(const std::string& key,
20 const base::Value** value) const {
21 const base::Value* got_value = prefs_.get(key);
22 if (value && got_value)
23 *value = got_value;
24
25 return !!got_value;
26 }
27
28 bool PrefValueMap::GetValue(const std::string& key, base::Value** value) {
29 base::Value* got_value = prefs_.get(key);
30 if (value && got_value)
31 *value = got_value;
32
33 return !!got_value;
34 }
35
36 bool PrefValueMap::SetValue(const std::string& key,
37 scoped_ptr<base::Value> value) {
38 DCHECK(value);
39
40 base::Value* old_value = prefs_.get(key);
41 if (old_value && value->Equals(old_value))
42 return false;
43
44 prefs_.set(key, std::move(value));
45 return true;
46 }
47
48 bool PrefValueMap::RemoveValue(const std::string& key) {
49 return prefs_.erase(key) != 0;
50 }
51
52 void PrefValueMap::Clear() {
53 prefs_.clear();
54 }
55
56 void PrefValueMap::Swap(PrefValueMap* other) {
57 prefs_.swap(other->prefs_);
58 }
59
60 PrefValueMap::iterator PrefValueMap::begin() {
61 return prefs_.begin();
62 }
63
64 PrefValueMap::iterator PrefValueMap::end() {
65 return prefs_.end();
66 }
67
68 PrefValueMap::const_iterator PrefValueMap::begin() const {
69 return prefs_.begin();
70 }
71
72 PrefValueMap::const_iterator PrefValueMap::end() const {
73 return prefs_.end();
74 }
75
76 bool PrefValueMap::GetBoolean(const std::string& key,
77 bool* value) const {
78 const base::Value* stored_value = nullptr;
79 return GetValue(key, &stored_value) && stored_value->GetAsBoolean(value);
80 }
81
82 void PrefValueMap::SetBoolean(const std::string& key, bool value) {
83 SetValue(key, make_scoped_ptr(new base::FundamentalValue(value)));
84 }
85
86 bool PrefValueMap::GetString(const std::string& key,
87 std::string* value) const {
88 const base::Value* stored_value = nullptr;
89 return GetValue(key, &stored_value) && stored_value->GetAsString(value);
90 }
91
92 void PrefValueMap::SetString(const std::string& key,
93 const std::string& value) {
94 SetValue(key, make_scoped_ptr(new base::StringValue(value)));
95 }
96
97 bool PrefValueMap::GetInteger(const std::string& key, int* value) const {
98 const base::Value* stored_value = nullptr;
99 return GetValue(key, &stored_value) && stored_value->GetAsInteger(value);
100 }
101
102 void PrefValueMap::SetInteger(const std::string& key, const int value) {
103 SetValue(key, make_scoped_ptr(new base::FundamentalValue(value)));
104 }
105
106 void PrefValueMap::SetDouble(const std::string& key, const double value) {
107 SetValue(key, make_scoped_ptr(new base::FundamentalValue(value)));
108 }
109
110 void PrefValueMap::GetDifferingKeys(
111 const PrefValueMap* other,
112 std::vector<std::string>* differing_keys) const {
113 differing_keys->clear();
114
115 // Put everything into ordered maps.
116 std::map<std::string, base::Value*> this_prefs(prefs_.begin(), prefs_.end());
117 std::map<std::string, base::Value*> other_prefs(other->prefs_.begin(),
118 other->prefs_.end());
119
120 // Walk over the maps in lockstep, adding everything that is different.
121 auto this_pref(this_prefs.begin());
122 auto other_pref(other_prefs.begin());
123 while (this_pref != this_prefs.end() && other_pref != other_prefs.end()) {
124 const int diff = this_pref->first.compare(other_pref->first);
125 if (diff == 0) {
126 if (!this_pref->second->Equals(other_pref->second))
127 differing_keys->push_back(this_pref->first);
128 ++this_pref;
129 ++other_pref;
130 } else if (diff < 0) {
131 differing_keys->push_back(this_pref->first);
132 ++this_pref;
133 } else if (diff > 0) {
134 differing_keys->push_back(other_pref->first);
135 ++other_pref;
136 }
137 }
138
139 // Add the remaining entries.
140 for ( ; this_pref != this_prefs.end(); ++this_pref)
141 differing_keys->push_back(this_pref->first);
142 for ( ; other_pref != other_prefs.end(); ++other_pref)
143 differing_keys->push_back(other_pref->first);
144 }
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