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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 BASE_PREFS_DEFAULT_PREF_STORE_H_ | 5 // TODO(brettw) remove this forwarding header when prefs is completely moved to |
6 #define BASE_PREFS_DEFAULT_PREF_STORE_H_ | 6 // components. |
7 | 7 #include "components/prefs/default_pref_store.h" |
8 #include <string> | |
9 | |
10 #include "base/macros.h" | |
11 #include "base/observer_list.h" | |
12 #include "base/prefs/base_prefs_export.h" | |
13 #include "base/prefs/pref_store.h" | |
14 #include "base/prefs/pref_value_map.h" | |
15 #include "base/values.h" | |
16 | |
17 // Used within a PrefRegistry to keep track of default preference values. | |
18 class BASE_PREFS_EXPORT DefaultPrefStore : public PrefStore { | |
19 public: | |
20 typedef PrefValueMap::const_iterator const_iterator; | |
21 | |
22 DefaultPrefStore(); | |
23 | |
24 // PrefStore implementation: | |
25 bool GetValue(const std::string& key, | |
26 const base::Value** result) const override; | |
27 void AddObserver(PrefStore::Observer* observer) override; | |
28 void RemoveObserver(PrefStore::Observer* observer) override; | |
29 bool HasObservers() const override; | |
30 | |
31 // Sets a |value| for |key|. Should only be called if a value has not been | |
32 // set yet; otherwise call ReplaceDefaultValue(). | |
33 void SetDefaultValue(const std::string& key, scoped_ptr<base::Value> value); | |
34 | |
35 // Replaces the the value for |key| with a new value. Should only be called | |
36 // if a value has alreday been set; otherwise call SetDefaultValue(). | |
37 void ReplaceDefaultValue(const std::string& key, | |
38 scoped_ptr<base::Value> value); | |
39 | |
40 const_iterator begin() const; | |
41 const_iterator end() const; | |
42 | |
43 private: | |
44 ~DefaultPrefStore() override; | |
45 | |
46 PrefValueMap prefs_; | |
47 | |
48 base::ObserverList<PrefStore::Observer, true> observers_; | |
49 | |
50 DISALLOW_COPY_AND_ASSIGN(DefaultPrefStore); | |
51 }; | |
52 | |
53 #endif // BASE_PREFS_DEFAULT_PREF_STORE_H_ | |
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