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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_IMPL_H_ |
| 6 #define SERVICES_PREFERENCES_PUBLIC_CPP_PREF_STORE_IMPL_H_ |
| 7 |
| 8 #include <vector> |
| 9 |
| 10 #include "base/macros.h" |
| 11 #include "base/memory/ref_counted.h" |
| 12 #include "components/prefs/pref_store.h" |
| 13 #include "components/prefs/pref_value_store.h" |
| 14 #include "mojo/public/cpp/bindings/binding.h" |
| 15 #include "services/preferences/public/interfaces/preferences.mojom.h" |
| 16 |
| 17 namespace prefs { |
| 18 |
| 19 // Wraps an actual PrefStore implementation and exposes it as a |
| 20 // mojom::PrefStore interface. |
| 21 class PrefStoreImpl : public ::PrefStore::Observer, public mojom::PrefStore { |
| 22 public: |
| 23 // The created instance is registered in and owned by the |
| 24 // |mojom::PrefStoreRegistry|. |
| 25 static std::unique_ptr<PrefStoreImpl> Create( |
| 26 mojom::PrefStoreRegistryPtr registry_ptr, |
| 27 scoped_refptr<::PrefStore> pref_store, |
| 28 PrefValueStore::PrefStoreType type); |
| 29 |
| 30 PrefStoreImpl(scoped_refptr<::PrefStore> pref_store, |
| 31 mojom::PrefStoreRequest request); |
| 32 ~PrefStoreImpl() override; |
| 33 |
| 34 private: |
| 35 // PrefStore::Observer: |
| 36 void OnPrefValueChanged(const std::string& key) override; |
| 37 void OnInitializationCompleted(bool succeeded) override; |
| 38 |
| 39 // prefs::mojom::PrefStore: |
| 40 void AddObserver(const AddObserverCallback& callback) override; |
| 41 |
| 42 // The backing store we observer for changes. This a |WeakPtr| because if we |
| 43 // hold on to the |PrefStore| until this is torned down we mess up shutdown |
| 44 // order, which e.g. depends on when the |Profile| is deleted. This is quite |
| 45 // unsatisfactory. |
| 46 scoped_refptr<::PrefStore> backing_pref_store_; |
| 47 |
| 48 // Observers we notify when |backing_pref_store_| changes. |
| 49 std::vector<mojom::PrefStoreObserverPtr> observers_; |
| 50 |
| 51 // True when the |backing_pref_store_| is initialized, either because it was |
| 52 // passed already initialized in the constructor or after |
| 53 // OnInitializationCompleted was called. |
| 54 bool initialized_; |
| 55 |
| 56 mojo::Binding<mojom::PrefStore> binding_; |
| 57 |
| 58 DISALLOW_COPY_AND_ASSIGN(PrefStoreImpl); |
| 59 }; |
| 60 |
| 61 } // namespace prefs |
| 62 |
| 63 #endif // SERVICES_PREFERENCES_PUBLIC_CPP_PREF_STORE_IMPL_H_ |
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