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.release()); 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.release()); 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() {} 54
