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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 "components/syncable_prefs/synced_pref_change_registrar.h" | |
6 | |
7 #include "base/bind.h" | |
8 | |
9 namespace syncable_prefs { | |
10 | |
11 namespace { | |
12 | |
13 void InvokeUnnamedCallback( | |
14 const SyncedPrefChangeRegistrar::ChangeCallback& callback, | |
15 const std::string& path, | |
16 bool from_sync) { | |
17 callback.Run(from_sync); | |
18 } | |
19 | |
20 } // namespace | |
21 | |
22 SyncedPrefChangeRegistrar::SyncedPrefChangeRegistrar( | |
23 PrefServiceSyncable* pref_service) { | |
24 pref_service_ = pref_service; | |
25 } | |
26 | |
27 SyncedPrefChangeRegistrar::~SyncedPrefChangeRegistrar() { | |
28 RemoveAll(); | |
29 } | |
30 | |
31 void SyncedPrefChangeRegistrar::Add(const char *path, | |
32 const ChangeCallback& callback) { | |
33 Add(path, base::Bind(InvokeUnnamedCallback, callback)); | |
34 } | |
35 | |
36 void SyncedPrefChangeRegistrar::Add(const char *path, | |
37 const NamedChangeCallback& callback) { | |
38 DCHECK(!IsObserved(path)); | |
39 observers_[path] = callback; | |
40 pref_service_->AddSyncedPrefObserver(path, this); | |
41 } | |
42 | |
43 void SyncedPrefChangeRegistrar::Remove(const char *path) { | |
44 observers_.erase(path); | |
45 pref_service_->RemoveSyncedPrefObserver(path, this); | |
46 } | |
47 | |
48 void SyncedPrefChangeRegistrar::RemoveAll() { | |
49 for (ObserverMap::iterator iter = observers_.begin(); | |
50 iter != observers_.end(); ++iter) { | |
51 pref_service_->RemoveSyncedPrefObserver(iter->first, this); | |
52 } | |
53 observers_.clear(); | |
54 } | |
55 | |
56 bool SyncedPrefChangeRegistrar::IsObserved(const char* path) const { | |
57 return observers_.find(path) != observers_.end(); | |
58 } | |
59 | |
60 void SyncedPrefChangeRegistrar::OnSyncedPrefChanged(const std::string& path, | |
61 bool from_sync) { | |
62 if (pref_service_->IsManagedPreference(path.c_str())) | |
63 return; | |
64 ObserverMap::const_iterator iter = observers_.find(path); | |
65 if (iter == observers_.end()) | |
66 return; | |
67 iter->second.Run(path, from_sync); | |
68 } | |
69 | |
70 } // namespace syncable_prefs | |
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