Add policies to control power management on the Chrome OS login screen

chrome/browser/chromeos/policy/login_screen_power_management_policy.cc

+// Copyright 2013 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/policy/login_screen_power_management_policy.h"
+
+#include "base/json/json_reader.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/values.h"
+#include "chrome/browser/policy/configuration_policy_handler.h"
+#include "chrome/browser/policy/policy_error_map.h"
+#include "chromeos/dbus/power_policy_controller.h"
+#include "grit/generated_resources.h"
+#include "policy/policy_constants.h"
+
+namespace policy {
+
+namespace {
+  const char kScreenDimDelayAC[] = "AC.Delays.ScreenDim";
+  const char kScreenOffDelayAC[] = "AC.Delays.ScreenOff";
+  const char kIdleDelayAC[] = "AC.Delays.Idle";
+  const char kScreenDimDelayBattery[] = "Battery.Delays.ScreenDim";
+  const char kScreenOffDelayBattery[] = "Battery.Delays.ScreenOff";
+  const char kIdleDelayBattery[] = "Battery.Delays.Idle";
+  const char kIdleActionAC[] = "AC.IdleAction";
+  const char kIdleActionBattery[] = "Battery.IdleAction";
+  const char kLidCloseAction[] = "LidCloseAction";
+  const char kUserActivityScreenDimDelayScale[] =
+      "UserActivityScreenDimDelayScale";
+
+  const char kActionSuspend[]   = "Suspend";
+  const char kActionShutdown[]  = "Shutdown";
+  const char kActionDoNothing[] = "DoNothing";
+
+scoped_ptr<base::Value> GetValue(const base::DictionaryValue* dict,
+                                 const std::string& key,
+                                 base::Value::Type type,
+                                 PolicyErrorMap* errors) {
+  const base::Value* value;
+  if (!dict->Get(key, &value))
+    return scoped_ptr<base::Value>();
+
+  if (!value->IsType(type)) {
+    if (errors) {
+      errors->AddError(key::kDeviceLoginScreenPowerManagement,
+                       key,
+                       IDS_POLICY_TYPE_ERROR,
+                       ConfigurationPolicyHandler::ValueTypeToString(type));
+    }
+    return scoped_ptr<base::Value>();
+  }
+
+  return scoped_ptr<base::Value>(value->DeepCopy());
+}
+
+scoped_ptr<base::Value> GetInteger(const base::DictionaryValue* dict,
+                                   const std::string& key,
+                                   int minimum,
+                                   PolicyErrorMap* errors) {
+  scoped_ptr<base::Value> value =
+      GetValue(dict, key, base::Value::TYPE_INTEGER, errors);
+  int integer;
+  if (!value || !value->GetAsInteger(&integer) || integer >= minimum)
+    return value.Pass();
+
+  if (errors) {
+    errors->AddError(key::kDeviceLoginScreenPowerManagement,
+                     key,
+                     IDS_POLICY_OUT_OF_RANGE_ERROR,
+                     base::IntToString(integer));
+  }
+  return scoped_ptr<base::Value>();
+}
+
+scoped_ptr<base::Value> GetAction(const base::DictionaryValue* dict,
+                                  const std::string& key,
+                                  PolicyErrorMap* errors) {
+  scoped_ptr<base::Value> value =
+      GetValue(dict, key, base::Value::TYPE_STRING, errors);
+  std::string action;
+  if (!value || !value->GetAsString(&action))
+    return value.Pass();
+
+  if (action == kActionSuspend) {
+    return scoped_ptr<base::Value>(new base::FundamentalValue(
+        chromeos::PowerPolicyController::ACTION_SUSPEND));
+  }
+  if (action == kActionShutdown) {
+    return scoped_ptr<base::Value>(new base::FundamentalValue(
+        chromeos::PowerPolicyController::ACTION_SHUT_DOWN));
+  }
+  if (action == kActionDoNothing) {
+    return scoped_ptr<base::Value>(new base::FundamentalValue(
+        chromeos::PowerPolicyController::ACTION_DO_NOTHING));
+  }
+
+  if (errors) {
+    errors->AddError(key::kDeviceLoginScreenPowerManagement,
+                     key,
+                     IDS_POLICY_OUT_OF_RANGE_ERROR,
+                     action);
+  }
+  return scoped_ptr<base::Value>();
+}
+
+}  // namespace
+
+LoginScreenPowerManagementPolicy::LoginScreenPowerManagementPolicy() {
+}
+
+LoginScreenPowerManagementPolicy::~LoginScreenPowerManagementPolicy() {
+}
+
+bool LoginScreenPowerManagementPolicy::Init(const std::string& json,
+                                            PolicyErrorMap* errors) {
+  std::string error;
+  scoped_ptr<base::Value> root(base::JSONReader::ReadAndReturnError(
+      json, base::JSON_ALLOW_TRAILING_COMMAS, NULL, &error));
+  base::DictionaryValue* dict = NULL;
+  if (!root || !root->GetAsDictionary(&dict)) {
+    if (errors) {
+      errors->AddError(key::kDeviceLoginScreenPowerManagement,
+                       IDS_POLICY_JSON_PARSE_ERROR,
+                       error);
+    }
+    // Errors in JSON decoding are fatal.
+    return false;
+  }
+
+  screen_dim_delay_ac_ = GetInteger(dict, kScreenDimDelayAC, 0, errors);
+  screen_off_delay_ac_ = GetInteger(dict, kScreenOffDelayAC, 0, errors);
+  idle_delay_ac_ = GetInteger(dict, kIdleDelayAC, 0, errors);
+  screen_dim_delay_battery_ =
+      GetInteger(dict, kScreenDimDelayBattery, 0, errors);
+  screen_off_delay_battery_ =
+      GetInteger(dict, kScreenOffDelayBattery, 0, errors);
+  idle_delay_battery_ = GetInteger(dict, kIdleDelayBattery, 0, errors);
+  idle_action_ac_ = GetAction(dict, kIdleActionAC, errors);
+  idle_action_battery_ = GetAction(dict, kIdleActionBattery, errors);
+  lid_close_action_ = GetAction(dict, kLidCloseAction, errors);
+  user_activity_screen_dim_delay_scale_ =
+      GetInteger(dict, kUserActivityScreenDimDelayScale, 100, errors);
+
+  // Validation errors for individual power policies are non-fatal as other
+  // power policies that pass validation will still be applied.
+  return true;
+}
+
+const base::Value*
+    LoginScreenPowerManagementPolicy::GetScreenDimDelayAC() const {
+  return screen_dim_delay_ac_.get();
+}
+
+const base::Value*
+    LoginScreenPowerManagementPolicy::GetScreenOffDelayAC() const {
+  return screen_off_delay_ac_.get();
+}
+
+const base::Value* LoginScreenPowerManagementPolicy::GetIdleDelayAC() const {
+  return idle_delay_ac_.get();
+}
+
+const base::Value*
+    LoginScreenPowerManagementPolicy::GetScreenDimDelayBattery() const {
+  return screen_dim_delay_battery_.get();
+}
+
+const base::Value*
+    LoginScreenPowerManagementPolicy::GetScreenOffDelayBattery() const {
+  return screen_off_delay_battery_.get();
+}
+
+const base::Value*
+    LoginScreenPowerManagementPolicy::GetIdleDelayBattery() const {
+  return idle_delay_battery_.get();
+}
+
+const base::Value* LoginScreenPowerManagementPolicy::GetIdleActionAC() const {
+  return idle_action_ac_.get();
+}
+
+const base::Value*
+    LoginScreenPowerManagementPolicy::GetIdleActionBattery() const {
+  return idle_action_battery_.get();
+}
+
+const base::Value* LoginScreenPowerManagementPolicy::GetLidCloseAction() const {
+  return lid_close_action_.get();
+}
+
+const base::Value* LoginScreenPowerManagementPolicy::
+    GetUserActivityScreenDimDelayScale() const {
+  return user_activity_screen_dim_delay_scale_.get();
+}
+
+} // namespace policy