1 // Copyright (c) 2011 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 #ifndef CHROME_BROWSER_PREFS_VALUE_MAP_PREF_STORE_H_ 6 #define CHROME_BROWSER_PREFS_VALUE_MAP_PREF_STORE_H_ 7 #pragma once 8 9 #include "base/basictypes.h" 10 #include "base/observer_list.h" 11 #include "chrome/browser/prefs/pref_value_map.h" 12 #include "chrome/common/pref_store.h" 13 14 // A basic PrefStore implementation that uses a simple name-value map for 15 // storing the preference values. 16 class ValueMapPrefStore : public PrefStore { 17 public: 18 typedef std::map<std::string, Value*>::iterator iterator; 19 typedef std::map<std::string, Value*>::const_iterator const_iterator; 20 21 ValueMapPrefStore(); 22 virtual ~ValueMapPrefStore(); 23 24 // PrefStore overrides: 25 virtual ReadResult GetValue(const std::string& key, 26 const Value** value) const; 27 virtual void AddObserver(PrefStore::Observer* observer); 28 virtual void RemoveObserver(PrefStore::Observer* observer); 29 30 iterator begin(); 31 iterator end(); 32 const_iterator begin() const; 33 const_iterator end() const; 34 35 protected: 36 // Store a |value| for |key| in the store. Also generates an notification if 37 // the value changed. Assumes ownership of |value|, which must be non-NULL. 38 void SetValue(const std::string& key, Value* value); 39 40 // Remove the value for |key| from the store. Sends a notification if there 41 // was a value to be removed. 42 void RemoveValue(const std::string& key); 43 44 // Notify observers about the initialization completed event. 45 void NotifyInitializationCompleted(); 46 47 private: 48 PrefValueMap prefs_; 49 50 ObserverList<PrefStore::Observer, true> observers_; 51 52 DISALLOW_COPY_AND_ASSIGN(ValueMapPrefStore); 53 }; 54 55 #endif // CHROME_BROWSER_PREFS_VALUE_MAP_PREF_STORE_H_ 56