chrome/browser/web_resource/eula_accepted_notifier.cc

   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/web_resource/eula_accepted_notifier.h"
   6
   7 #include "base/bind.h"
   8 #include "base/logging.h"
   9 #include "base/prefs/pref_service.h"
  10 #include "chrome/browser/browser_process.h"
  11 #include "chrome/common/pref_names.h"
  12
  13 EulaAcceptedNotifier::EulaAcceptedNotifier(PrefService* local_state)
  14     : local_state_(local_state), observer_(NULL) {
  15 }
  16
  17 EulaAcceptedNotifier::~EulaAcceptedNotifier() {
  18 }
  19
  20 void EulaAcceptedNotifier::Init(Observer* observer) {
  21   DCHECK(!observer_ && observer);
  22   observer_ = observer;
  23 }
  24
  25 bool EulaAcceptedNotifier::IsEulaAccepted() {
  26   if (local_state_->GetBoolean(prefs::kEulaAccepted))
  27     return true;
  28
  29   // Register for the notification, if this is the first time.
  30   if (registrar_.IsEmpty()) {
  31     registrar_.Init(local_state_);
  32     registrar_.Add(prefs::kEulaAccepted,
  33                    base::Bind(&EulaAcceptedNotifier::OnPrefChanged,
  34                               base::Unretained(this)));
  35   }
  36   return false;
  37 }
  38
  39 // static
  40 EulaAcceptedNotifier* EulaAcceptedNotifier::Create() {
  41   // First run EULA only exists on ChromeOS, Android and iOS. On ChromeOS, it is
  42   // only shown in official builds.
  43 #if (defined(OS_CHROMEOS) && defined(GOOGLE_CHROME_BUILD)) || \
  44     defined(OS_ANDROID) || defined(OS_IOS)
  45   PrefService* local_state = g_browser_process->local_state();
  46   // Tests that use higher-level classes that use EulaAcceptNotifier may not
  47   // register this pref. In this case, return NULL which is equivalent to not
  48   // needing to check the EULA.
  49   if (local_state->FindPreference(prefs::kEulaAccepted) == NULL)
  50     return NULL;
  51   return new EulaAcceptedNotifier(local_state);
  52 #else
  53   return NULL;
  54 #endif
  55 }
  56
  57 void EulaAcceptedNotifier::NotifyObserver() {
  58   observer_->OnEulaAccepted();
  59 }
  60
  61 void EulaAcceptedNotifier::OnPrefChanged() {
  62   DCHECK(!registrar_.IsEmpty());
  63   registrar_.RemoveAll();
  64
  65   DCHECK(local_state_->GetBoolean(prefs::kEulaAccepted));
  66   observer_->OnEulaAccepted();
  67 }
  68