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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef COMPONENTS_PREFS_DEFAULT_PREF_STORE_H_ | 5 #ifndef COMPONENTS_PREFS_DEFAULT_PREF_STORE_H_ |
6 #define COMPONENTS_PREFS_DEFAULT_PREF_STORE_H_ | 6 #define COMPONENTS_PREFS_DEFAULT_PREF_STORE_H_ |
7 | 7 |
8 #include <memory> | |
9 #include <string> | 8 #include <string> |
10 | 9 |
11 #include "base/macros.h" | 10 #include "base/macros.h" |
12 #include "base/observer_list.h" | 11 #include "base/observer_list.h" |
13 #include "base/values.h" | 12 #include "base/values.h" |
14 #include "components/prefs/base_prefs_export.h" | 13 #include "components/prefs/base_prefs_export.h" |
15 #include "components/prefs/pref_store.h" | 14 #include "components/prefs/pref_store.h" |
16 #include "components/prefs/pref_value_map.h" | 15 #include "components/prefs/pref_value_map.h" |
17 | 16 |
18 // Used within a PrefRegistry to keep track of default preference values. | 17 // Used within a PrefRegistry to keep track of default preference values. |
19 class COMPONENTS_PREFS_EXPORT DefaultPrefStore : public PrefStore { | 18 class COMPONENTS_PREFS_EXPORT DefaultPrefStore : public PrefStore { |
20 public: | 19 public: |
21 typedef PrefValueMap::const_iterator const_iterator; | 20 typedef PrefValueMap::const_iterator const_iterator; |
22 | 21 |
23 DefaultPrefStore(); | 22 DefaultPrefStore(); |
24 | 23 |
25 // PrefStore implementation: | 24 // PrefStore implementation: |
26 bool GetValue(const std::string& key, | 25 bool GetValue(const std::string& key, |
27 const base::Value** result) const override; | 26 const base::Value** result) const override; |
28 std::unique_ptr<base::DictionaryValue> GetValues() const override; | |
29 void AddObserver(PrefStore::Observer* observer) override; | 27 void AddObserver(PrefStore::Observer* observer) override; |
30 void RemoveObserver(PrefStore::Observer* observer) override; | 28 void RemoveObserver(PrefStore::Observer* observer) override; |
31 bool HasObservers() const override; | 29 bool HasObservers() const override; |
32 | 30 |
33 // Sets a |value| for |key|. Should only be called if a value has not been | 31 // Sets a |value| for |key|. Should only be called if a value has not been |
34 // set yet; otherwise call ReplaceDefaultValue(). | 32 // set yet; otherwise call ReplaceDefaultValue(). |
35 void SetDefaultValue(const std::string& key, | 33 void SetDefaultValue(const std::string& key, |
36 std::unique_ptr<base::Value> value); | 34 std::unique_ptr<base::Value> value); |
37 | 35 |
38 // Replaces the the value for |key| with a new value. Should only be called | 36 // Replaces the the value for |key| with a new value. Should only be called |
39 // if a value has alreday been set; otherwise call SetDefaultValue(). | 37 // if a value has alreday been set; otherwise call SetDefaultValue(). |
40 void ReplaceDefaultValue(const std::string& key, | 38 void ReplaceDefaultValue(const std::string& key, |
41 std::unique_ptr<base::Value> value); | 39 std::unique_ptr<base::Value> value); |
42 | 40 |
43 const_iterator begin() const; | 41 const_iterator begin() const; |
44 const_iterator end() const; | 42 const_iterator end() const; |
45 | 43 |
46 private: | 44 private: |
47 ~DefaultPrefStore() override; | 45 ~DefaultPrefStore() override; |
48 | 46 |
49 PrefValueMap prefs_; | 47 PrefValueMap prefs_; |
50 | 48 |
51 base::ObserverList<PrefStore::Observer, true> observers_; | 49 base::ObserverList<PrefStore::Observer, true> observers_; |
52 | 50 |
53 DISALLOW_COPY_AND_ASSIGN(DefaultPrefStore); | 51 DISALLOW_COPY_AND_ASSIGN(DefaultPrefStore); |
54 }; | 52 }; |
55 | 53 |
56 #endif // COMPONENTS_PREFS_DEFAULT_PREF_STORE_H_ | 54 #endif // COMPONENTS_PREFS_DEFAULT_PREF_STORE_H_ |
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