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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 #include "services/preferences/public/cpp/pref_store_client_mixin.h" |
| 6 |
| 7 #include <utility> |
| 8 |
| 9 #include "base/values.h" |
| 10 #include "services/preferences/public/cpp/pref_store_client.h" |
| 11 |
| 12 namespace prefs { |
| 13 |
| 14 template <typename BasePrefStore> |
| 15 PrefStoreClientMixin<BasePrefStore>::PrefStoreClientMixin() |
| 16 : observer_binding_(this) {} |
| 17 |
| 18 template <typename BasePrefStore> |
| 19 void PrefStoreClientMixin<BasePrefStore>::AddObserver( |
| 20 PrefStore::Observer* observer) { |
| 21 observers_.AddObserver(observer); |
| 22 } |
| 23 |
| 24 template <typename BasePrefStore> |
| 25 void PrefStoreClientMixin<BasePrefStore>::RemoveObserver( |
| 26 PrefStore::Observer* observer) { |
| 27 observers_.RemoveObserver(observer); |
| 28 } |
| 29 |
| 30 template <typename BasePrefStore> |
| 31 bool PrefStoreClientMixin<BasePrefStore>::HasObservers() const { |
| 32 return observers_.might_have_observers(); |
| 33 } |
| 34 |
| 35 template <typename BasePrefStore> |
| 36 bool PrefStoreClientMixin<BasePrefStore>::IsInitializationComplete() const { |
| 37 return initialized_ && static_cast<bool>(cached_prefs_); |
| 38 } |
| 39 |
| 40 template <typename BasePrefStore> |
| 41 bool PrefStoreClientMixin<BasePrefStore>::GetValue( |
| 42 const std::string& key, |
| 43 const base::Value** result) const { |
| 44 DCHECK(initialized_); |
| 45 DCHECK(cached_prefs_); |
| 46 return cached_prefs_->Get(key, result); |
| 47 } |
| 48 |
| 49 template <typename BasePrefStore> |
| 50 std::unique_ptr<base::DictionaryValue> |
| 51 PrefStoreClientMixin<BasePrefStore>::GetValues() const { |
| 52 DCHECK(initialized_); |
| 53 DCHECK(cached_prefs_); |
| 54 return cached_prefs_->CreateDeepCopy(); |
| 55 } |
| 56 |
| 57 template <typename BasePrefStore> |
| 58 PrefStoreClientMixin<BasePrefStore>::~PrefStoreClientMixin() = default; |
| 59 |
| 60 template <typename BasePrefStore> |
| 61 void PrefStoreClientMixin<BasePrefStore>::Init( |
| 62 std::unique_ptr<base::DictionaryValue> initial_prefs, |
| 63 bool initialized, |
| 64 mojom::PrefStoreObserverRequest observer_request) { |
| 65 cached_prefs_ = std::move(initial_prefs); |
| 66 observer_binding_.Bind(std::move(observer_request)); |
| 67 if (initialized) |
| 68 OnInitializationCompleted(static_cast<bool>(cached_prefs_)); |
| 69 } |
| 70 |
| 71 template <typename BasePrefStore> |
| 72 base::DictionaryValue& PrefStoreClientMixin<BasePrefStore>::GetMutableValues() { |
| 73 DCHECK(cached_prefs_); |
| 74 return *cached_prefs_; |
| 75 } |
| 76 |
| 77 template <typename BasePrefStore> |
| 78 void PrefStoreClientMixin<BasePrefStore>::ReportPrefValueChanged( |
| 79 const std::string& key) { |
| 80 for (auto& observer : observers_) |
| 81 observer.OnPrefValueChanged(key); |
| 82 } |
| 83 |
| 84 template <typename BasePrefStore> |
| 85 void PrefStoreClientMixin<BasePrefStore>::OnPrefChanged( |
| 86 const std::string& key, |
| 87 std::unique_ptr<base::Value> value) { |
| 88 DCHECK(cached_prefs_); |
| 89 bool changed = false; |
| 90 if (!value) { // Delete |
| 91 if (cached_prefs_->RemovePath(key, nullptr)) |
| 92 changed = true; |
| 93 } else { |
| 94 const base::Value* prev; |
| 95 if (cached_prefs_->Get(key, &prev)) { |
| 96 if (!prev->Equals(value.get())) { |
| 97 cached_prefs_->Set(key, std::move(value)); |
| 98 changed = true; |
| 99 } |
| 100 } else { |
| 101 cached_prefs_->Set(key, std::move(value)); |
| 102 changed = true; |
| 103 } |
| 104 } |
| 105 if (changed) |
| 106 ReportPrefValueChanged(key); |
| 107 } |
| 108 |
| 109 template <typename BasePrefStore> |
| 110 void PrefStoreClientMixin<BasePrefStore>::OnInitializationCompleted( |
| 111 bool succeeded) { |
| 112 if (!initialized_) { |
| 113 initialized_ = true; |
| 114 for (auto& observer : observers_) |
| 115 observer.OnInitializationCompleted(succeeded); |
| 116 } |
| 117 } |
| 118 |
| 119 template class PrefStoreClientMixin<::PrefStore>; |
| 120 template class PrefStoreClientMixin<::PersistentPrefStore>; |
| 121 |
| 122 } // namespace prefs |
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