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1 // Copyright 2017 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 #ifndef SERVICES_PREFERENCES_PUBLIC_CPP_PREF_STORE_CLIENT_H_ | |
6 #define SERVICES_PREFERENCES_PUBLIC_CPP_PREF_STORE_CLIENT_H_ | |
7 | |
8 #include <string> | |
9 | |
10 #include "base/macros.h" | |
11 #include "base/observer_list.h" | |
12 #include "base/values.h" | |
13 #include "components/prefs/pref_store.h" | |
14 #include "components/prefs/pref_value_map.h" | |
15 #include "mojo/public/cpp/bindings/binding.h" | |
16 #include "services/preferences/public/cpp/pref_store_manager_impl.h" | |
17 #include "services/preferences/public/interfaces/preferences.mojom.h" | |
18 | |
19 namespace prefs { | |
20 | |
21 // TODO(tibell): Make PrefObserverStore use PrefStoreClient as a base class. | |
22 | |
23 // An implementation of PrefStore which uses prefs::mojom::PrefStore as | |
24 // the backing store of the preferences. | |
25 // | |
26 // PrefStoreClient provides synchronous access to the preferences stored by the | |
27 // backing store by caching them locally. | |
28 class PrefStoreClient : public ::PrefStore, public mojom::PrefStoreObserver { | |
29 public: | |
30 explicit PrefStoreClient(mojom::PrefStoreConnectionPtr connection); | |
31 | |
32 // PrefStore: | |
33 void AddObserver(PrefStore::Observer* observer) override; | |
34 void RemoveObserver(PrefStore::Observer* observer) override; | |
35 bool HasObservers() const override; | |
36 bool IsInitializationComplete() const override; | |
37 bool GetValue(const std::string& key, | |
38 const base::Value** result) const override; | |
39 std::unique_ptr<base::DictionaryValue> GetValues() const override; | |
40 | |
41 private: | |
42 friend class PrefStoreClientTest; | |
43 | |
44 ~PrefStoreClient() override; | |
45 | |
46 void OnConnected(); | |
Sam McNally
2017/03/03 03:47:58
Remove.
tibell
2017/03/07 00:52:52
Done.
| |
47 | |
48 // prefs::mojom::PreferenceObserver: | |
49 void OnPrefChanged(const std::string& key, | |
50 std::unique_ptr<base::Value> value) override; | |
51 void OnInitializationCompleted(bool succeeded) override; | |
52 | |
53 // Cached preferences. | |
54 std::unique_ptr<base::DictionaryValue> cached_prefs_; | |
55 | |
56 base::ObserverList<PrefStore::Observer, true> observers_; | |
57 | |
58 // Has the PrefStore we're observing been initialized? | |
59 bool initialized_; | |
60 | |
61 mojo::Binding<mojom::PrefStoreObserver> observer_binding_; | |
62 | |
63 DISALLOW_COPY_AND_ASSIGN(PrefStoreClient); | |
64 }; | |
65 | |
66 } // namespace prefs | |
67 | |
68 #endif // SERVICES_PREFERENCES_PUBLIC_CPP_PREF_STORE_CLIENT_H_ | |
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