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