1// Copyright 2014 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_TRACKED_TRACKED_SPLIT_PREFERENCE_H_
6#define CHROME_BROWSER_PREFS_TRACKED_TRACKED_SPLIT_PREFERENCE_H_
7
8#include <string>
9
10#include "base/compiler_specific.h"
11#include "base/macros.h"
12#include "chrome/browser/prefs/pref_hash_filter.h"
13#include "chrome/browser/prefs/tracked/tracked_preference.h"
14#include "chrome/browser/prefs/tracked/tracked_preference_helper.h"
15
16class TrackedPreferenceValidationDelegate;
17
18// A TrackedSplitPreference must be tracking a dictionary pref. Each top-level
19// entry in its dictionary is tracked and enforced independently. An optional
20// delegate is notified of the status of the preference during enforcement.
21// Note: preferences using this strategy must be kept in sync with
22// TrackedSplitPreferences in histograms.xml.
23class TrackedSplitPreference : public TrackedPreference {
24 public:
25  // Constructs a TrackedSplitPreference. |pref_path| must be a dictionary pref.
26  TrackedSplitPreference(const std::string& pref_path,
27                         size_t reporting_id,
28                         size_t reporting_ids_count,
29                         PrefHashFilter::EnforcementLevel enforcement_level,
30                         TrackedPreferenceValidationDelegate* delegate);
31
32  // TrackedPreference implementation.
33  virtual void OnNewValue(const base::Value* value,
34                          PrefHashStoreTransaction* transaction) const OVERRIDE;
35  virtual bool EnforceAndReport(
36      base::DictionaryValue* pref_store_contents,
37      PrefHashStoreTransaction* transaction) const OVERRIDE;
38
39 private:
40  const std::string pref_path_;
41  const TrackedPreferenceHelper helper_;
42  TrackedPreferenceValidationDelegate* delegate_;
43
44  DISALLOW_COPY_AND_ASSIGN(TrackedSplitPreference);
45};
46
47#endif  // CHROME_BROWSER_PREFS_TRACKED_TRACKED_SPLIT_PREFERENCE_H_
48