Allow recommended locales to be set for public sessions

chrome/browser/chromeos/login/screens/user_selection_screen.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/chromeos/login/screens/user_selection_screen.h"
 
 #include <vector>
 
 #include "ash/shell.h"
 #include "base/location.h"
@@ skipping 24 matching lines @@
 const char kKeyEnterpriseDomain[] = "enterpriseDomain";
 const char kKeyPublicAccount[] = "publicAccount";
 const char kKeySupervisedUser[] = "supervisedUser";
 const char kKeySignedIn[] = "signedIn";
 const char kKeyCanRemove[] = "canRemove";
 const char kKeyIsOwner[] = "isOwner";
 const char kKeyInitialAuthType[] = "initialAuthType";
 const char kKeyMultiProfilesAllowed[] = "isMultiProfilesAllowed";
 const char kKeyMultiProfilesPolicy[] = "multiProfilesPolicy";
 const char kKeyInitialLocales[] = "initialLocales";
+const char kKeyInitialLocale[] = "initialLocale";
+const char kKeyInitialMultipleRecommendedLocales[] =
+    "initialMultipleRecommendedLocales";
 const char kKeyInitialKeyboardLayout[] = "initialKeyboardLayout";
 
 // Max number of users to show.
 // Please keep synced with one in signin_userlist_unittest.cc.
 const size_t kMaxUsers = 18;
 
 const int kPasswordClearTimeoutSec = 60;
 
+void AddPublicSessionDetailsToUserDictionaryEntry(
+    base::DictionaryValue* user_dict,
+    const std::vector<std::string>* public_session_recommended_locales) {
+  policy::BrowserPolicyConnectorChromeOS* policy_connector =
+      g_browser_process->platform_part()->browser_policy_connector_chromeos();
+
+  if (policy_connector->IsEnterpriseManaged()) {
+    user_dict->SetString(kKeyEnterpriseDomain,
+                         policy_connector->GetEnterpriseDomain());
+  }
+
+  std::vector<std::string> kEmptyRecommendedLocales;
+  const std::vector<std::string>* recommended_locales =
+      public_session_recommended_locales ?
+          public_session_recommended_locales : &kEmptyRecommendedLocales;
+
+  // Set |kKeyInitialLocales| to the list of available locales. This list
+  // consists of the recommended locales, followed by all others.
+  user_dict->Set(
+      kKeyInitialLocales,
+      GetUILanguageList(recommended_locales, std::string()).release());
+
+  // Set |kKeyInitialLocale| to the initially selected locale. If the list of
+  // recommended locales is not empty, select its first entry. Otherwise,
+  // select the current UI locale.
+  user_dict->SetString(kKeyInitialLocale,
+                       recommended_locales->empty() ?
+                           g_browser_process->GetApplicationLocale() :
+                           recommended_locales->front());
+
+  // Set |kKeyInitialMultipleRecommendedLocales| to indicate whether the list
+  // of recommended locales contains at least two entries. This is used to
+  // decide whether the public session pod expands to its basic form (for zero
+  // or one recommended locales) or the advanced form (two or more recommended
+  // locales).
+  user_dict->SetBoolean(kKeyInitialMultipleRecommendedLocales,
+                        recommended_locales->size() >= 2);
+
+  // Set |kKeyInitialKeyboardLayout| to the current keyboard layout. This
+  // value will be used temporarily only because the UI immediately requests a
+  // list of keyboard layouts suitable for the currently selected locale.
+  user_dict->Set(kKeyInitialKeyboardLayout,
+                 GetCurrentKeyboardLayout().release());
+}
+
 }  // namespace
 
 UserSelectionScreen::UserSelectionScreen() : handler_(NULL) {
 }
 
 UserSelectionScreen::~UserSelectionScreen() {
   wm::UserActivityDetector* activity_detector =
       ash::Shell::GetInstance()->user_activity_detector();
   if (activity_detector->HasObserver(this))
     activity_detector->RemoveObserver(this);
 }
 
 // static
 void UserSelectionScreen::FillUserDictionary(
     user_manager::User* user,
     bool is_owner,
     bool is_signin_to_add,
     ScreenlockBridge::LockHandler::AuthType auth_type,
+    const std::vector<std::string>* public_session_recommended_locales,
     base::DictionaryValue* user_dict) {
   const std::string& user_id = user->email();
-  const bool is_public_account =
+  const bool is_public_session =
       user->GetType() == user_manager::USER_TYPE_PUBLIC_ACCOUNT;
   const bool is_supervised_user =
       user->GetType() == user_manager::USER_TYPE_SUPERVISED;
 
   user_dict->SetString(kKeyUsername, user_id);
   user_dict->SetString(kKeyEmailAddress, user->display_email());
   user_dict->SetString(kKeyDisplayName, user->GetDisplayName());
-  user_dict->SetBoolean(kKeyPublicAccount, is_public_account);
+  user_dict->SetBoolean(kKeyPublicAccount, is_public_session);
   user_dict->SetBoolean(kKeySupervisedUser, is_supervised_user);
   user_dict->SetInteger(kKeyInitialAuthType, auth_type);
   user_dict->SetBoolean(kKeySignedIn, user->is_logged_in());
   user_dict->SetBoolean(kKeyIsOwner, is_owner);
 
   // Fill in multi-profiles related fields.
   if (is_signin_to_add) {
     MultiProfileUserController* multi_profile_user_controller =
         UserManager::Get()->GetMultiProfileUserController();
     MultiProfileUserController::UserAllowedInSessionReason isUserAllowedReason;
     bool isUserAllowed = multi_profile_user_controller->IsUserAllowedInSession(
         user_id, &isUserAllowedReason);
     user_dict->SetBoolean(kKeyMultiProfilesAllowed, isUserAllowed);
 
     std::string behavior;
     switch (isUserAllowedReason) {
       case MultiProfileUserController::NOT_ALLOWED_OWNER_AS_SECONDARY:
         behavior = MultiProfileUserController::kBehaviorOwnerPrimaryOnly;
         break;
       default:
         behavior = multi_profile_user_controller->GetCachedValue(user_id);
     }
     user_dict->SetString(kKeyMultiProfilesPolicy, behavior);
   } else {
     user_dict->SetBoolean(kKeyMultiProfilesAllowed, true);
   }
 
-  if (is_public_account) {
-    policy::BrowserPolicyConnectorChromeOS* policy_connector =
-        g_browser_process->platform_part()->browser_policy_connector_chromeos();
-
-    if (policy_connector->IsEnterpriseManaged()) {
-      user_dict->SetString(kKeyEnterpriseDomain,
-                           policy_connector->GetEnterpriseDomain());
-    }
-
-    // TODO(bartfab): Initialize |most_relevant_languages| and |locale| based on
-    // policy.
-    const std::string locale = g_browser_process->GetApplicationLocale();
-    std::vector<std::string> most_relevant_languages;
-    user_dict->Set(
-        kKeyInitialLocales,
-        GetUILanguageList(&most_relevant_languages, locale).release());
-    user_dict->Set(kKeyInitialKeyboardLayout,
-                   GetCurrentKeyboardLayout().release());
+  if (is_public_session) {
+    AddPublicSessionDetailsToUserDictionaryEntry(
+        user_dict,
+        public_session_recommended_locales);
   }
 }
 
 // static
 bool UserSelectionScreen::ShouldForceOnlineSignIn(
     const user_manager::User* user) {
   // Public sessions are always allowed to log in offline.
   // Supervised user are allowed to log in offline if their OAuth token status
   // is unknown or valid.
   // For all other users, force online sign in if:
@@ skipping 133 matching lines @@
 
   policy::BrowserPolicyConnectorChromeOS* connector =
       g_browser_process->platform_part()->browser_policy_connector_chromeos();
   bool is_enterprise_managed = connector->IsEnterpriseManaged();
 
   const user_manager::UserList users_to_send =
       PrepareUserListForSending(users, owner, is_signin_to_add);
 
   user_auth_type_map_.clear();
 
+  const std::vector<std::string> kEmptyRecommendedLocales;
   for (user_manager::UserList::const_iterator it = users_to_send.begin();
        it != users_to_send.end();
        ++it) {
     const std::string& user_id = (*it)->email();
     bool is_owner = (user_id == owner);
     const bool is_public_account =
         ((*it)->GetType() == user_manager::USER_TYPE_PUBLIC_ACCOUNT);
     const ScreenlockBridge::LockHandler::AuthType initial_auth_type =
         is_public_account
             ? ScreenlockBridge::LockHandler::EXPAND_THEN_USER_CLICK
             : (ShouldForceOnlineSignIn(*it)
                    ? ScreenlockBridge::LockHandler::ONLINE_SIGN_IN
                    : ScreenlockBridge::LockHandler::OFFLINE_PASSWORD);
     user_auth_type_map_[user_id] = initial_auth_type;
 
     base::DictionaryValue* user_dict = new base::DictionaryValue();
-    FillUserDictionary(
-        *it, is_owner, is_signin_to_add, initial_auth_type, user_dict);
+    const std::vector<std::string>* public_session_recommended_locales =
+        public_session_recommended_locales_.find(user_id) ==
+            public_session_recommended_locales_.end() ?
+                &kEmptyRecommendedLocales :
+                &public_session_recommended_locales_[user_id];
+    FillUserDictionary(*it,
+                       is_owner,
+                       is_signin_to_add,
+                       initial_auth_type,
+                       public_session_recommended_locales,
+                       user_dict);
     bool signed_in = (*it)->is_logged_in();
     // Single user check here is necessary because owner info might not be
     // available when running into login screen on first boot.
     // See http://crosbug.com/12723
     bool can_remove_user =
         ((!single_user || is_enterprise_managed) && !user_id.empty() &&
          !is_owner && !is_public_account && !signed_in && !is_signin_to_add);
     user_dict->SetBoolean(kKeyCanRemove, can_remove_user);
     users_list.Append(user_dict);
   }
@@ skipping 12 matching lines @@
 }
 
 ScreenlockBridge::LockHandler::AuthType UserSelectionScreen::GetAuthType(
     const std::string& username) const {
   if (user_auth_type_map_.find(username) == user_auth_type_map_.end())
     return ScreenlockBridge::LockHandler::OFFLINE_PASSWORD;
   return user_auth_type_map_.find(username)->second;
 }
 
 }  // namespace chromeos