1
// Copyright 2013 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.
5
#ifndef BASE_PREFS_PREF_FILTER_H_
6
#define BASE_PREFS_PREF_FILTER_H_
10
#include "base/prefs/base_prefs_export.h"
13
class DictionaryValue;
17
// Filters preferences as they are loaded from disk or updated at runtime.
18
// Currently supported only by JsonPrefStore.
19
class BASE_PREFS_EXPORT PrefFilter {
21
virtual ~PrefFilter() {}
23
// Receives notification when the pref store data has been loaded but before
24
// Observers are notified.
25
// Changes made by a PrefFilter during FilterOnLoad do not result in
26
// notifications to |PrefStore::Observer|s.
27
virtual void FilterOnLoad(base::DictionaryValue* pref_store_contents) = 0;
29
// Receives notification when a pref store value is changed, before Observers
31
virtual void FilterUpdate(const std::string& path) = 0;
33
// Receives notification when the pref store is about to serialize data
34
// contained in |pref_store_contents| to a string.
35
virtual void FilterSerializeData(
36
const base::DictionaryValue* pref_store_contents) = 0;
39
#endif // BASE_PREFS_PREF_FILTER_H_