56 lines
1.8 KiB
C
56 lines
1.8 KiB
C
|
// Copyright 2012 The Chromium Authors
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
#ifndef COMPONENTS_PREFS_DEFAULT_PREF_STORE_H_
|
||
|
|
#define COMPONENTS_PREFS_DEFAULT_PREF_STORE_H_
|
||
|
|
|
||
|
|
#include <memory>
|
||
|
|
#include <string>
|
||
|
|
|
||
|
|
#include "base/observer_list.h"
|
||
|
|
#include "base/strings/string_piece.h"
|
||
|
|
#include "base/values.h"
|
||
|
|
#include "components/prefs/pref_store.h"
|
||
|
|
#include "components/prefs/pref_value_map.h"
|
||
|
|
#include "components/prefs/prefs_export.h"
|
||
|
|
|
||
|
|
// Used within a PrefRegistry to keep track of default preference values.
|
||
|
|
class COMPONENTS_PREFS_EXPORT DefaultPrefStore : public PrefStore {
|
||
|
|
public:
|
||
|
|
typedef PrefValueMap::const_iterator const_iterator;
|
||
|
|
|
||
|
|
DefaultPrefStore();
|
||
|
|
|
||
|
|
DefaultPrefStore(const DefaultPrefStore&) = delete;
|
||
|
|
DefaultPrefStore& operator=(const DefaultPrefStore&) = delete;
|
||
|
|
|
||
|
|
// PrefStore implementation:
|
||
|
|
bool GetValue(base::StringPiece key,
|
||
|
|
const base::Value** result) const override;
|
||
|
|
base::Value::Dict GetValues() const override;
|
||
|
|
void AddObserver(PrefStore::Observer* observer) override;
|
||
|
|
void RemoveObserver(PrefStore::Observer* observer) override;
|
||
|
|
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, 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, base::Value value);
|
||
|
|
|
||
|
|
const_iterator begin() const;
|
||
|
|
const_iterator end() const;
|
||
|
|
|
||
|
|
private:
|
||
|
|
~DefaultPrefStore() override;
|
||
|
|
|
||
|
|
PrefValueMap prefs_;
|
||
|
|
|
||
|
|
base::ObserverList<PrefStore::Observer, true>::Unchecked observers_;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif // COMPONENTS_PREFS_DEFAULT_PREF_STORE_H_
|