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
8using base::Value;
9
10DefaultPrefStore::DefaultPrefStore() {}
11
12bool DefaultPrefStore::GetValue(const std::string& key,
13                                const Value** result) const {
14  return prefs_.GetValue(key, result);
15}
16
17void DefaultPrefStore::AddObserver(PrefStore::Observer* observer) {
18  observers_.AddObserver(observer);
19}
20
21void DefaultPrefStore::RemoveObserver(PrefStore::Observer* observer) {
22  observers_.RemoveObserver(observer);
23}
24
25bool DefaultPrefStore::HasObservers() const {
26  return observers_.might_have_observers();
27}
28
29void DefaultPrefStore::SetDefaultValue(const std::string& key,
30                                       scoped_ptr<Value> value) {
31  DCHECK(!GetValue(key, NULL));
32  prefs_.SetValue(key, value.release());
33}
34
35void 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
45DefaultPrefStore::const_iterator DefaultPrefStore::begin() const {
46  return prefs_.begin();
47}
48
49DefaultPrefStore::const_iterator DefaultPrefStore::end() const {
50  return prefs_.end();
51}
52
53DefaultPrefStore::~DefaultPrefStore() {}
54