chrome/browser/ui/webui/chromeos/login/terms_of_service_screen_handler.cc

   1 // Copyright (c) 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/ui/webui/chromeos/login/terms_of_service_screen_handler.h"
   6
   7 #include <vector>
   8
   9 #include "base/bind.h"
  10 #include "base/bind_helpers.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/prefs/pref_service.h"
  13 #include "base/strings/string_split.h"
  14 #include "base/values.h"
  15 #include "chrome/browser/browser_process.h"
  16 #include "chrome/browser/chromeos/base/locale_util.h"
  17 #include "chrome/browser/chromeos/login/screens/core_oobe_actor.h"
  18 #include "chrome/browser/chromeos/profiles/profile_helper.h"
  19 #include "chrome/browser/profiles/profile.h"
  20 #include "chrome/browser/profiles/profile_manager.h"
  21 #include "chrome/browser/ui/webui/chromeos/login/oobe_ui.h"
  22 #include "chrome/common/pref_names.h"
  23 #include "chrome/grit/chromium_strings.h"
  24 #include "chrome/grit/generated_resources.h"
  25 #include "components/login/localized_values_builder.h"
  26 #include "components/user_manager/user.h"
  27 #include "components/user_manager/user_manager.h"
  28 #include "content/public/browser/web_ui.h"
  29 #include "ui/base/ime/chromeos/input_method_manager.h"
  30
  31 namespace {
  32
  33 const char kJsScreenPath[] = "login.TermsOfServiceScreen";
  34
  35 }  // namespace
  36
  37 namespace chromeos {
  38
  39 TermsOfServiceScreenHandler::TermsOfServiceScreenHandler(
  40     CoreOobeActor* core_oobe_actor)
  41     : BaseScreenHandler(kJsScreenPath),
  42       screen_(NULL),
  43       core_oobe_actor_(core_oobe_actor),
  44       show_on_init_(false),
  45       load_error_(false) {
  46 }
  47
  48 TermsOfServiceScreenHandler::~TermsOfServiceScreenHandler() {
  49   if (screen_)
  50     screen_->OnActorDestroyed(this);
  51 }
  52
  53 void TermsOfServiceScreenHandler::RegisterMessages() {
  54   AddCallback("termsOfServiceBack",
  55               &TermsOfServiceScreenHandler::HandleBack);
  56   AddCallback("termsOfServiceAccept",
  57               &TermsOfServiceScreenHandler::HandleAccept);
  58 }
  59
  60 void TermsOfServiceScreenHandler::DeclareLocalizedValues(
  61     ::login::LocalizedValuesBuilder* builder) {
  62   builder->Add("termsOfServiceScreenHeading",
  63                IDS_TERMS_OF_SERVICE_SCREEN_HEADING);
  64   builder->Add("termsOfServiceScreenSubheading",
  65                IDS_TERMS_OF_SERVICE_SCREEN_SUBHEADING);
  66   builder->Add("termsOfServiceContentHeading",
  67                IDS_TERMS_OF_SERVICE_SCREEN_CONTENT_HEADING);
  68   builder->Add("termsOfServiceLoading", IDS_TERMS_OF_SERVICE_SCREEN_LOADING);
  69   builder->Add("termsOfServiceError", IDS_TERMS_OF_SERVICE_SCREEN_ERROR);
  70   builder->Add("termsOfServiceTryAgain", IDS_TERMS_OF_SERVICE_SCREEN_TRY_AGAIN);
  71   builder->Add("termsOfServiceBackButton",
  72                IDS_TERMS_OF_SERVICE_SCREEN_BACK_BUTTON);
  73   builder->Add("termsOfServiceAcceptButton",
  74                IDS_TERMS_OF_SERVICE_SCREEN_ACCEPT_BUTTON);
  75 }
  76
  77 void TermsOfServiceScreenHandler::SetDelegate(Delegate* screen) {
  78   screen_ = screen;
  79 }
  80
  81 void TermsOfServiceScreenHandler::Show() {
  82   if (!page_is_ready()) {
  83     show_on_init_ = true;
  84     return;
  85   }
  86
  87   const std::string locale =
  88       ProfileHelper::Get()
  89           ->GetProfileByUserUnsafe(
  90               user_manager::UserManager::Get()->GetActiveUser())
  91           ->GetPrefs()
  92           ->GetString(prefs::kApplicationLocale);
  93
  94   if (locale.empty() || locale == g_browser_process->GetApplicationLocale()) {
  95     // If the user has not chosen a UI locale yet or the chosen locale matches
  96     // the current UI locale, show the screen immediately.
  97     DoShow();
  98     return;
  99   }
 100
 101   // Switch to the user's UI locale before showing the screen.
 102   locale_util::SwitchLanguageCallback callback(
 103       base::Bind(&TermsOfServiceScreenHandler::OnLanguageChangedCallback,
 104                  base::Unretained(this)));
 105   locale_util::SwitchLanguage(locale,
 106                               true,   // enable_locale_keyboard_layouts
 107                               false,  // login_layouts_only
 108                               callback, ProfileManager::GetActiveUserProfile());
 109 }
 110
 111 void TermsOfServiceScreenHandler::Hide() {
 112 }
 113
 114 void TermsOfServiceScreenHandler::SetDomain(const std::string& domain) {
 115   domain_ = domain;
 116   UpdateDomainInUI();
 117 }
 118
 119 void TermsOfServiceScreenHandler::OnLoadError() {
 120   load_error_ = true;
 121   terms_of_service_ = "";
 122   UpdateTermsOfServiceInUI();
 123 }
 124
 125 void TermsOfServiceScreenHandler::OnLoadSuccess(
 126     const std::string& terms_of_service) {
 127   load_error_ = false;
 128   terms_of_service_ = terms_of_service;
 129   UpdateTermsOfServiceInUI();
 130 }
 131
 132 void TermsOfServiceScreenHandler::Initialize() {
 133   if (show_on_init_) {
 134     Show();
 135     show_on_init_ = false;
 136   }
 137 }
 138
 139 void TermsOfServiceScreenHandler::OnLanguageChangedCallback(
 140     const locale_util::LanguageSwitchResult& result) {
 141   // Update the screen contents to the new locale.
 142   base::DictionaryValue localized_strings;
 143   static_cast<OobeUI*>(web_ui()->GetController())
 144       ->GetLocalizedStrings(&localized_strings);
 145   core_oobe_actor_->ReloadContent(localized_strings);
 146
 147   DoShow();
 148 }
 149
 150 void TermsOfServiceScreenHandler::DoShow() {
 151   // Determine the user's most preferred input method.
 152   std::vector<std::string> input_methods = base::SplitString(
 153       ProfileHelper::Get()
 154           ->GetProfileByUserUnsafe(
 155               user_manager::UserManager::Get()->GetActiveUser())
 156           ->GetPrefs()
 157           ->GetString(prefs::kLanguagePreloadEngines),
 158       ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
 159
 160   if (!input_methods.empty()) {
 161     // If the user has a preferred input method, enable it and switch to it.
 162     chromeos::input_method::InputMethodManager* input_method_manager =
 163         chromeos::input_method::InputMethodManager::Get();
 164     input_method_manager->GetActiveIMEState()->EnableInputMethod(
 165         input_methods.front());
 166     input_method_manager->GetActiveIMEState()->ChangeInputMethod(
 167         input_methods.front(), false /* show_message */);
 168   }
 169
 170   // Updates the domain name shown in the UI.
 171   UpdateDomainInUI();
 172
 173   // Update the UI to show an error message or the Terms of Service.
 174   UpdateTermsOfServiceInUI();
 175
 176   ShowScreen(OobeUI::kScreenTermsOfService, NULL);
 177 }
 178
 179 void TermsOfServiceScreenHandler::UpdateDomainInUI() {
 180   if (page_is_ready())
 181     CallJS("setDomain", domain_);
 182 }
 183
 184 void TermsOfServiceScreenHandler::UpdateTermsOfServiceInUI() {
 185   if (!page_is_ready())
 186     return;
 187
 188   // If either |load_error_| or |terms_of_service_| is set, the download of the
 189   // Terms of Service has completed and the UI should be updated. Otherwise, the
 190   // download is still in progress and the UI will be updated when the
 191   // OnLoadError() or the OnLoadSuccess() callback is called.
 192   if (load_error_)
 193     CallJS("setTermsOfServiceLoadError");
 194   else if (!terms_of_service_.empty())
 195     CallJS("setTermsOfService", terms_of_service_);
 196 }
 197
 198 void TermsOfServiceScreenHandler::HandleBack() {
 199   if (screen_)
 200     screen_->OnDecline();
 201 }
 202
 203 void TermsOfServiceScreenHandler::HandleAccept() {
 204   if (!screen_)
 205     return;
 206
 207   // If the Terms of Service have not been successfully downloaded, the "accept
 208   // and continue" button should not be accessible. If the user managed to
 209   // activate it somehow anway, do not treat this as acceptance of the Terms
 210   // and Conditions and end the session instead, as if the user had declined.
 211   if (terms_of_service_.empty())
 212     screen_->OnDecline();
 213   else
 214     screen_->OnAccept();
 215 }
 216
 217 }  // namespace chromeos