ChromeOS: implement per-user time zone preferences.

chrome/browser/extensions/api/settings_private/prefs_util.cc

 // Copyright 2015 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/extensions/api/settings_private/prefs_util.h"
 
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/chrome_extension_function.h"
 #include "chrome/browser/extensions/settings_api_helpers.h"
@@ skipping 21 matching lines @@
 #include "extensions/browser/management_policy.h"
 #include "extensions/common/extension.h"
 
 #if defined(OS_CHROMEOS)
 #include "ash/public/cpp/ash_pref_names.h"  // nogncheck
 #include "chrome/browser/chromeos/ownership/owner_settings_service_chromeos.h"
 #include "chrome/browser/chromeos/ownership/owner_settings_service_chromeos_factory.h"
 #include "chrome/browser/chromeos/policy/browser_policy_connector_chromeos.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/chromeos/settings/cros_settings.h"
+#include "chrome/browser/chromeos/system/timezone_util.h"
 #include "chromeos/settings/cros_settings_names.h"
 #include "ui/chromeos/events/pref_names.h"
 #endif
 
 namespace {
 
 #if defined(OS_CHROMEOS)
 bool IsPrivilegedCrosSetting(const std::string& pref_name) {
   if (!chromeos::CrosSettings::IsCrosSettings(pref_name))
     return false;
-  // kSystemTimezone should be changeable by all users.
-  if (pref_name == chromeos::kSystemTimezone)
-    return false;
-  // All other Cros settings are considered privileged and are either policy
+  if (!chromeos::system::PerUserTimezoneEnabled()) {
+    // kSystemTimezone should be changeable by all users.
+    if (pref_name == chromeos::kSystemTimezone)
+      return false;
+  }
+  // Cros settings are considered privileged and are either policy
   // controlled or owner controlled.
   return true;
 }
+
+bool IsCrosSettingReadOnly(const std::string& pref_name) {
+  if (chromeos::system::PerUserTimezoneEnabled()) {
+    // System timezone is never directly changable by user.
+    return pref_name == chromeos::kSystemTimezone;
+  }
+  return false;
+}
 #endif
 
 }  // namespace
 
 namespace extensions {
 
 namespace settings_private = api::settings_private;
 
 PrefsUtil::PrefsUtil(Profile* profile) : profile_(profile) {}
 
@@ skipping 213 matching lines @@
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
   (*s_whitelist)[proxy_config::prefs::kUseSharedProxies] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
   (*s_whitelist)[::prefs::kWakeOnWifiDarkConnect] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
   (*s_whitelist)[::chromeos::kSignedDataRoamingEnabled] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
 
   // Timezone settings.
   (*s_whitelist)[chromeos::kSystemTimezone] =
+      settings_private::PrefType::PREF_TYPE_STRING;
+  (*s_whitelist)[prefs::kUserTimezone] =
+      settings_private::PrefType::PREF_TYPE_STRING;
+  (*s_whitelist)[::prefs::kResolveTimezoneByGeolocation] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
-  (*s_whitelist)[::prefs::kResolveTimezoneByGeolocation] =
+  (*s_whitelist)[chromeos::kPerUserTimezoneEnabled] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
 
   // Ash settings.
   (*s_whitelist)[::prefs::kEnableStylusTools] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
   (*s_whitelist)[::prefs::kLaunchPaletteOnEjectEvent] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
   (*s_whitelist)[::prefs::kNoteTakingAppEnabledOnLockScreen] =
       settings_private::PrefType::PREF_TYPE_BOOLEAN;
   (*s_whitelist)[ash::prefs::kNightLightEnabled] =
@@ skipping 152 matching lines @@
     pref = pref_service->FindPreference(name);
     if (!pref)
       return nullptr;
     pref_object.reset(new settings_private::PrefObject());
     pref_object->key = pref->name();
     pref_object->type = GetType(name, pref->GetType());
     pref_object->value.reset(pref->GetValue()->DeepCopy());
   }
 
 #if defined(OS_CHROMEOS)
+  // We first check for enterprise-managed, then for primary-user managed.
+  // Otherwise in multiprofile mode enterprise preference for the secondary
+  // user will appear primary-user-controlled, which looks strange, because
+  // primary user preference will be disabled with "enterprise controlled"
+  // status.
+  if (IsPrefEnterpriseManaged(name)) {
+    // Enterprise managed prefs are treated the same as device policy restricted
+    // prefs in the UI.
+    pref_object->controlled_by =
+        settings_private::ControlledBy::CONTROLLED_BY_DEVICE_POLICY;
+    pref_object->enforcement =
+        settings_private::Enforcement::ENFORCEMENT_ENFORCED;
+    return pref_object;
+  }
+
   if (IsPrefPrimaryUserControlled(name)) {
     pref_object->controlled_by =
         settings_private::ControlledBy::CONTROLLED_BY_PRIMARY_USER;
     pref_object->enforcement =
         settings_private::Enforcement::ENFORCEMENT_ENFORCED;
     pref_object->controlled_by_name.reset(
         new std::string(user_manager::UserManager::Get()
                             ->GetPrimaryUser()
                             ->GetAccountId()
                             .GetUserEmail()));
     return pref_object;
   }
-
-  if (IsPrefEnterpriseManaged(name)) {
-    // Enterprise managed prefs are treated the same as device policy restricted
-    // prefs in the UI.
-    pref_object->controlled_by =
-        settings_private::ControlledBy::CONTROLLED_BY_DEVICE_POLICY;
-    pref_object->enforcement =
-        settings_private::Enforcement::ENFORCEMENT_ENFORCED;
-    return pref_object;
-  }
 #endif
 
   if (pref && pref->IsManaged()) {
     pref_object->controlled_by =
         settings_private::ControlledBy::CONTROLLED_BY_USER_POLICY;
     pref_object->enforcement =
         settings_private::Enforcement::ENFORCEMENT_ENFORCED;
     return pref_object;
   }
 
@@ skipping 165 matching lines @@
 #endif
 }
 
 bool PrefsUtil::IsPrefTypeURL(const std::string& pref_name) {
   return GetWhitelistedPrefType(pref_name) ==
          settings_private::PrefType::PREF_TYPE_URL;
 }
 
 #if defined(OS_CHROMEOS)
 bool PrefsUtil::IsPrefEnterpriseManaged(const std::string& pref_name) {
-  if (IsPrivilegedCrosSetting(pref_name)) {
-    policy::BrowserPolicyConnectorChromeOS* connector =
-        g_browser_process->platform_part()->browser_policy_connector_chromeos();
-    if (connector->IsEnterpriseManaged())
+  policy::BrowserPolicyConnectorChromeOS* connector =
+      g_browser_process->platform_part()->browser_policy_connector_chromeos();
+  if (connector->IsEnterpriseManaged()) {

[stevenjb, 2017/07/17 16:57:11]

Much more clear now, thanks!

nit: Now it looks like we can do:

if (!connector->IsEnterpriseManaged())
  return false;

[Alexander Alekseev, 2017/07/20 00:30:53]

Done.

+    if (IsPrivilegedCrosSetting(pref_name))
       return true;
+    if (chromeos::system::PerUserTimezoneEnabled() &&
+        (pref_name == prefs::kUserTimezone ||
+         pref_name == prefs::kResolveTimezoneByGeolocation)) {
+      return chromeos::system::IsTimezonePrefsManaged(pref_name);
+    }
   }
   return false;
 }
 
 bool PrefsUtil::IsPrefOwnerControlled(const std::string& pref_name) {
+  // chromeos::kSystemTimezone is global display-only preference and
+  // it should appear as disabled, but not owned.
+  if (pref_name == chromeos::kSystemTimezone)
+    return false;
+
   if (IsPrivilegedCrosSetting(pref_name)) {
     if (!chromeos::ProfileHelper::IsOwnerProfile(profile_))
       return true;
   }
   return false;
 }
 
 bool PrefsUtil::IsPrefPrimaryUserControlled(const std::string& pref_name) {
-  if (pref_name == prefs::kWakeOnWifiDarkConnect) {
+  // chromeos::kSystemTimezone is read-only, but for the non-primary users
+  // it should have "primary user controlled" attribute.
+  if (pref_name == prefs::kWakeOnWifiDarkConnect ||
+      pref_name == prefs::kResolveTimezoneByGeolocation ||
+      pref_name == prefs::kUserTimezone ||
+      pref_name == chromeos::kSystemTimezone) {
     user_manager::UserManager* user_manager = user_manager::UserManager::Get();
     const user_manager::User* user =
         chromeos::ProfileHelper::Get()->GetUserByProfile(profile_);
-    if (user &&
-        user->GetAccountId() != user_manager->GetPrimaryUser()->GetAccountId())
+    if (user && user->GetAccountId() !=
+                    user_manager->GetPrimaryUser()->GetAccountId()) {
       return true;
+    }
   }
   return false;
 }
 #endif
 
 bool PrefsUtil::IsPrefSupervisorControlled(const std::string& pref_name) {
   if (pref_name != prefs::kBrowserGuestModeEnabled &&
       pref_name != prefs::kBrowserAddPersonEnabled) {
     return false;
   }
   return profile_->IsSupervised();
 }
 
 bool PrefsUtil::IsPrefUserModifiable(const std::string& pref_name) {
+#if defined(OS_CHROMEOS)
+  if (IsCrosSettingReadOnly(pref_name))
+    return false;
+#endif
+
   const PrefService::Preference* profile_pref =
       profile_->GetPrefs()->FindPreference(pref_name);
   if (profile_pref)
     return profile_pref->IsUserModifiable();
 
   const PrefService::Preference* local_state_pref =
       g_browser_process->local_state()->FindPreference(pref_name);
   if (local_state_pref)
     return local_state_pref->IsUserModifiable();
 
@@ skipping 67 matching lines @@
       ExtensionPrefValueMapFactory::GetForBrowserContext(profile_)
           ->GetExtensionControllingPref(pref_object.key);
   if (extension_id.empty())
     return nullptr;
 
   return ExtensionRegistry::Get(profile_)->GetExtensionById(
       extension_id, ExtensionRegistry::ENABLED);
 }
 
 }  // namespace extensions