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.
4
5#include "chrome/browser/prefs/synced_pref_change_registrar.h"
6
7#include "base/bind.h"
8
9namespace {
10
11void InvokeUnnamedCallback(
12    const SyncedPrefChangeRegistrar::ChangeCallback& callback,
13    const std::string& path,
14    bool from_sync) {
15  callback.Run(from_sync);
16}
17
18}  // namespace
19
20SyncedPrefChangeRegistrar::SyncedPrefChangeRegistrar(
21    PrefServiceSyncable* pref_service) {
22  pref_service_ = pref_service;
23}
24
25SyncedPrefChangeRegistrar::~SyncedPrefChangeRegistrar() {
26  RemoveAll();
27}
28
29void SyncedPrefChangeRegistrar::Add(const char *path,
30                                    const ChangeCallback& callback) {
31  Add(path, base::Bind(InvokeUnnamedCallback, callback));
32}
33
34void SyncedPrefChangeRegistrar::Add(const char *path,
35                                    const NamedChangeCallback& callback) {
36  DCHECK(!IsObserved(path));
37  observers_[path] = callback;
38  pref_service_->AddSyncedPrefObserver(path, this);
39}
40
41void SyncedPrefChangeRegistrar::Remove(const char *path) {
42  observers_.erase(path);
43  pref_service_->RemoveSyncedPrefObserver(path, this);
44}
45
46void SyncedPrefChangeRegistrar::RemoveAll() {
47  for (ObserverMap::iterator iter = observers_.begin();
48       iter != observers_.end(); ++iter) {
49    pref_service_->RemoveSyncedPrefObserver(iter->first, this);
50  }
51  observers_.clear();
52}
53
54bool SyncedPrefChangeRegistrar::IsObserved(const char* path) const {
55  return observers_.find(path) != observers_.end();
56}
57
58void SyncedPrefChangeRegistrar::OnSyncedPrefChanged(const std::string& path,
59                                                    bool from_sync) {
60  if (pref_service_->IsManagedPreference(path.c_str()))
61    return;
62  ObserverMap::const_iterator iter = observers_.find(path);
63  if (iter == observers_.end())
64    return;
65  iter->second.Run(path, from_sync);
66}
67