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1 // Copyright (c) 2011 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/scoped_user_pref_update.h"
6 
7 #include "base/logging.h"
8 #include "chrome/browser/prefs/pref_notifier.h"
9 #include "chrome/browser/prefs/pref_service.h"
10 
11 namespace subtle {
12 
ScopedUserPrefUpdateBase(PrefService * service,const char * path)13 ScopedUserPrefUpdateBase::ScopedUserPrefUpdateBase(PrefService* service,
14                                                    const char* path)
15     : service_(service),
16       path_(path),
17       value_(NULL) {}
18 
~ScopedUserPrefUpdateBase()19 ScopedUserPrefUpdateBase::~ScopedUserPrefUpdateBase() {
20   Notify();
21 }
22 
Get(Value::ValueType type)23 Value* ScopedUserPrefUpdateBase::Get(Value::ValueType type) {
24   if (!value_)
25     value_ = service_->GetMutableUserPref(path_.c_str(), type);
26   return value_;
27 }
28 
Notify()29 void ScopedUserPrefUpdateBase::Notify() {
30   if (value_) {
31     service_->ReportUserPrefChanged(path_);
32     value_ = NULL;
33   }
34 }
35 
36 }  // namespace subtle
37