pref_service_syncable.cc revision c2e0dbddbe15c98d52c4786dac06cb8952a8ae6d 
1// Copyright (c) 2012 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#include "chrome/browser/prefs/pref_service_syncable.h"
6
7#include "base/bind.h"
8#include "base/files/file_path.h"
9#include "base/prefs/default_pref_store.h"
10#include "base/prefs/overlay_user_pref_store.h"
11#include "base/prefs/pref_notifier_impl.h"
12#include "base/prefs/pref_registry.h"
13#include "base/prefs/pref_value_store.h"
14#include "base/strings/string_number_conversions.h"
15#include "base/value_conversions.h"
16#include "chrome/browser/prefs/pref_model_associator.h"
17#include "chrome/browser/prefs/pref_service_syncable_observer.h"
18#include "chrome/browser/profiles/profile.h"
19#include "chrome/browser/ui/prefs/prefs_tab_helper.h"
20#include "components/user_prefs/pref_registry_syncable.h"
21
22// static
23PrefServiceSyncable* PrefServiceSyncable::FromProfile(Profile* profile) {
24  return static_cast<PrefServiceSyncable*>(profile->GetPrefs());
25}
26
27// static
28PrefServiceSyncable* PrefServiceSyncable::IncognitoFromProfile(
29    Profile* profile) {
30  return static_cast<PrefServiceSyncable*>(profile->GetOffTheRecordPrefs());
31}
32
33PrefServiceSyncable::PrefServiceSyncable(
34    PrefNotifierImpl* pref_notifier,
35    PrefValueStore* pref_value_store,
36    PersistentPrefStore* user_prefs,
37    user_prefs::PrefRegistrySyncable* pref_registry,
38    base::Callback<void(PersistentPrefStore::PrefReadError)>
39        read_error_callback,
40    bool async)
41  : PrefService(pref_notifier,
42                pref_value_store,
43                user_prefs,
44                pref_registry,
45                read_error_callback,
46                async),
47    pref_sync_associator_(syncer::PREFERENCES),
48    priority_pref_sync_associator_(syncer::PRIORITY_PREFERENCES) {
49  pref_sync_associator_.SetPrefService(this);
50  priority_pref_sync_associator_.SetPrefService(this);
51
52  // Let PrefModelAssociators know about changes to preference values.
53  pref_value_store->set_callback(
54      base::Bind(&PrefServiceSyncable::ProcessPrefChange,
55                 base::Unretained(this)));
56
57  // Add already-registered syncable preferences to PrefModelAssociator.
58  const user_prefs::PrefRegistrySyncable::PrefToStatus& syncable_preferences =
59      pref_registry->syncable_preferences();
60  for (user_prefs::PrefRegistrySyncable::PrefToStatus::const_iterator it =
61           syncable_preferences.begin();
62       it != syncable_preferences.end();
63       ++it) {
64    AddRegisteredSyncablePreference(it->first.c_str(), it->second);
65  }
66
67  // Watch for syncable preferences registered after this point.
68  pref_registry->SetSyncableRegistrationCallback(
69      base::Bind(&PrefServiceSyncable::AddRegisteredSyncablePreference,
70                 base::Unretained(this)));
71}
72
73PrefServiceSyncable::~PrefServiceSyncable() {
74  // Remove our callback from the registry, since it may outlive us.
75  user_prefs::PrefRegistrySyncable* registry =
76      static_cast<user_prefs::PrefRegistrySyncable*>(pref_registry_.get());
77  registry->SetSyncableRegistrationCallback(
78      user_prefs::PrefRegistrySyncable::SyncableRegistrationCallback());
79}
80
81PrefServiceSyncable* PrefServiceSyncable::CreateIncognitoPrefService(
82    PrefStore* incognito_extension_prefs) {
83  pref_service_forked_ = true;
84  PrefNotifierImpl* pref_notifier = new PrefNotifierImpl();
85  OverlayUserPrefStore* incognito_pref_store =
86      new OverlayUserPrefStore(user_pref_store_.get());
87  PrefsTabHelper::InitIncognitoUserPrefStore(incognito_pref_store);
88
89  scoped_refptr<user_prefs::PrefRegistrySyncable> forked_registry =
90      static_cast<user_prefs::PrefRegistrySyncable*>(
91          pref_registry_.get())->ForkForIncognito();
92  PrefServiceSyncable* incognito_service = new PrefServiceSyncable(
93      pref_notifier,
94      pref_value_store_->CloneAndSpecialize(
95          NULL,  // managed
96          incognito_extension_prefs,
97          NULL,  // command_line_prefs
98          incognito_pref_store,
99          NULL,  // recommended
100          forked_registry->defaults(),
101          pref_notifier),
102      incognito_pref_store,
103      forked_registry,
104      read_error_callback_,
105      false);
106  return incognito_service;
107}
108
109bool PrefServiceSyncable::IsSyncing() {
110  return pref_sync_associator_.models_associated();
111}
112
113
114bool PrefServiceSyncable::IsPrioritySyncing() {
115  return priority_pref_sync_associator_.models_associated();
116}
117
118void PrefServiceSyncable::AddObserver(PrefServiceSyncableObserver* observer) {
119  observer_list_.AddObserver(observer);
120}
121
122void PrefServiceSyncable::RemoveObserver(
123    PrefServiceSyncableObserver* observer) {
124  observer_list_.RemoveObserver(observer);
125}
126
127syncer::SyncableService* PrefServiceSyncable::GetSyncableService(
128    const syncer::ModelType& type) {
129  if (type == syncer::PREFERENCES) {
130    return &pref_sync_associator_;
131  } else if (type == syncer::PRIORITY_PREFERENCES) {
132    return &priority_pref_sync_associator_;
133  } else {
134    NOTREACHED() << "invalid model type: " << type;
135    return NULL;
136  }
137}
138
139void PrefServiceSyncable::UpdateCommandLinePrefStore(
140    PrefStore* cmd_line_store) {
141  // If |pref_service_forked_| is true, then this PrefService and the forked
142  // copies will be out of sync.
143  DCHECK(!pref_service_forked_);
144  PrefService::UpdateCommandLinePrefStore(cmd_line_store);
145}
146
147void PrefServiceSyncable::AddRegisteredSyncablePreference(
148    const char* path,
149    const user_prefs::PrefRegistrySyncable::PrefSyncStatus sync_status) {
150  DCHECK(FindPreference(path));
151  if (sync_status == user_prefs::PrefRegistrySyncable::SYNCABLE_PREF) {
152    pref_sync_associator_.RegisterPref(path);
153  } else if (sync_status ==
154             user_prefs::PrefRegistrySyncable::SYNCABLE_PRIORITY_PREF) {
155    priority_pref_sync_associator_.RegisterPref(path);
156  } else {
157    NOTREACHED() << "invalid sync_status: " << sync_status;
158  }
159}
160
161void PrefServiceSyncable::OnIsSyncingChanged() {
162  FOR_EACH_OBSERVER(PrefServiceSyncableObserver, observer_list_,
163                    OnIsSyncingChanged());
164}
165
166void PrefServiceSyncable::ProcessPrefChange(const std::string& name) {
167  pref_sync_associator_.ProcessPrefChange(name);
168  priority_pref_sync_associator_.ProcessPrefChange(name);
169}
170