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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "base/prefs/default_pref_store.h" | |
| 6 #include "base/logging.h" | |
| 7 | |
| 8 using base::Value; | |
| 9 | |
| 10 DefaultPrefStore::DefaultPrefStore() {} | |
| 11 | |
| 12 bool DefaultPrefStore::GetValue(const std::string& key, | |
| 13 const Value** result) const { | |
| 14 return prefs_.GetValue(key, result); | |
| 15 } | |
| 16 | |
| 17 void DefaultPrefStore::AddObserver(PrefStore::Observer* observer) { | |
| 18 observers_.AddObserver(observer); | |
| 19 } | |
| 20 | |
| 21 void DefaultPrefStore::RemoveObserver(PrefStore::Observer* observer) { | |
| 22 observers_.RemoveObserver(observer); | |
| 23 } | |
| 24 | |
| 25 bool DefaultPrefStore::HasObservers() const { | |
| 26 return observers_.might_have_observers(); | |
| 27 } | |
| 28 | |
| 29 void DefaultPrefStore::SetDefaultValue(const std::string& key, | |
| 30 scoped_ptr<Value> value) { | |
| 31 DCHECK(!GetValue(key, NULL)); | |
| 32 prefs_.SetValue(key, value.Pass()); | |
| 33 } | |
| 34 | |
| 35 void DefaultPrefStore::ReplaceDefaultValue(const std::string& key, | |
| 36 scoped_ptr<Value> value) { | |
| 37 const Value* old_value = NULL; | |
| 38 GetValue(key, &old_value); | |
| 39 bool notify = !old_value->Equals(value.get()); | |
| 40 prefs_.SetValue(key, value.Pass()); | |
| 41 if (notify) | |
| 42 FOR_EACH_OBSERVER(Observer, observers_, OnPrefValueChanged(key)); | |
| 43 } | |
| 44 | |
| 45 DefaultPrefStore::const_iterator DefaultPrefStore::begin() const { | |
| 46 return prefs_.begin(); | |
| 47 } | |
| 48 | |
| 49 DefaultPrefStore::const_iterator DefaultPrefStore::end() const { | |
| 50 return prefs_.end(); | |
| 51 } | |
| 52 | |
| 53 DefaultPrefStore::~DefaultPrefStore() {} | |
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