blob: 23b909625599b73072f587c5f6eed63803355faf [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <string>
#include "base/observer_list.h"
#include "base/prefs/base_prefs_export.h"
#include "base/prefs/pref_store.h"
#include "base/prefs/pref_value_map.h"
#include "base/values.h"
// Used within a PrefRegistry to keep track of default preference values.
class BASE_PREFS_EXPORT DefaultPrefStore : public PrefStore {
typedef PrefValueMap::const_iterator const_iterator;
// PrefStore implementation:
virtual bool GetValue(const std::string& key,
const base::Value** result) const OVERRIDE;
virtual void AddObserver(PrefStore::Observer* observer) OVERRIDE;
virtual void RemoveObserver(PrefStore::Observer* observer) OVERRIDE;
virtual bool HasObservers() const OVERRIDE;
// Sets a |value| for |key|. Should only be called if a value has not been
// set yet; otherwise call ReplaceDefaultValue().
void SetDefaultValue(const std::string& key, scoped_ptr<base::Value> value);
// Replaces the the value for |key| with a new value. Should only be called
// if a value has alreday been set; otherwise call SetDefaultValue().
void ReplaceDefaultValue(const std::string& key,
scoped_ptr<base::Value> value);
const_iterator begin() const;
const_iterator end() const;
virtual ~DefaultPrefStore();
PrefValueMap prefs_;
ObserverList<PrefStore::Observer, true> observers_;