| // Copyright 2013 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. |
| |
| #ifndef BASE_PREFS_PREF_FILTER_H_ |
| #define BASE_PREFS_PREF_FILTER_H_ |
| |
| #include <string> |
| |
| #include "base/prefs/base_prefs_export.h" |
| |
| namespace base { |
| class DictionaryValue; |
| class Value; |
| } // namespace base |
| |
| // Filters preferences as they are loaded from disk or updated at runtime. |
| // Currently supported only by JsonPrefStore. |
| class BASE_PREFS_EXPORT PrefFilter { |
| public: |
| virtual ~PrefFilter() {} |
| |
| // Receives notification when the pref store data has been loaded but before |
| // Observers are notified. |
| // Changes made by a PrefFilter during FilterOnLoad do not result in |
| // notifications to |PrefStore::Observer|s. |
| virtual void FilterOnLoad(base::DictionaryValue* pref_store_contents) = 0; |
| |
| // Receives notification when a pref store value is changed, before Observers |
| // are notified. |
| virtual void FilterUpdate(const std::string& path) = 0; |
| |
| // Receives notification when the pref store is about to serialize data |
| // contained in |pref_store_contents| to a string. |
| virtual void FilterSerializeData( |
| const base::DictionaryValue* pref_store_contents) = 0; |
| }; |
| |
| #endif // BASE_PREFS_PREF_FILTER_H_ |