chromeos: Add power management policy prefs.

chromeos/dbus/power_policy_controller.cc

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.

[bartfab (slow), 2013/02/04 10:04:35]

I won't repeat the comments about magic constants all over this file. But they
apply of course: You can check whether a pref is at its default or not.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chromeos/dbus/power_policy_controller.h"
+
+#include "base/logging.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/power_manager/policy.pb.h"
+#include "chromeos/dbus/power_manager_client.h"
+
+namespace chromeos {
+
+namespace {
+
+// If |pref_field|, a member of |prefs_|, is a zero or positive delay,
+// assigns it to |proto_field|, a millisecond-based delay in |proto|, a
+// power_manager::PowerManagementPolicy::Delays message.  Does nothing if
+// the pref contains a negative delay.
+#define SET_DELAY_FROM_PREFS(pref_field, proto_field, proto) \
+    if (prefs_.pref_field >= base::TimeDelta()) \
+      proto->set_##proto_field(prefs_.pref_field.InMilliseconds());
+
+// Returns the power_manager::PowerManagementPolicy_Action value
+// corresponding to |action|.  Cannot be called with ACTION_UNSET.
+power_manager::PowerManagementPolicy_Action GetProtoAction(
+    PowerPolicyController::OptionalAction action) {
+  switch (action) {
+    case PowerPolicyController::ACTION_SUSPEND:
+      return power_manager::PowerManagementPolicy_Action_SUSPEND;
+    case PowerPolicyController::ACTION_STOP_SESSION:
+      return power_manager::PowerManagementPolicy_Action_STOP_SESSION;
+    case PowerPolicyController::ACTION_SHUT_DOWN:
+      return power_manager::PowerManagementPolicy_Action_SHUT_DOWN;
+    case PowerPolicyController::ACTION_DO_NOTHING:
+      return power_manager::PowerManagementPolicy_Action_DO_NOTHING;
+    default:
+      NOTREACHED() << "Unhandled action " << action;
+      return power_manager::PowerManagementPolicy_Action_DO_NOTHING;
+  }
+}
+
+}  // namespace
+
+const int PowerPolicyController::kUnsetDelayMs = -1;
+const double PowerPolicyController::kUnsetPresentationIdleDelayFactor = 0.0;
+
+PowerPolicyController::PolicyPrefs::PolicyPrefs()
+    : ac_screen_dim_delay(base::TimeDelta::FromMilliseconds(kUnsetDelayMs)),
+      ac_screen_off_delay(base::TimeDelta::FromMilliseconds(kUnsetDelayMs)),
+      ac_screen_lock_delay(base::TimeDelta::FromMilliseconds(kUnsetDelayMs)),
+      ac_idle_delay(base::TimeDelta::FromMilliseconds(kUnsetDelayMs)),
+      battery_screen_dim_delay(
+          base::TimeDelta::FromMilliseconds(kUnsetDelayMs)),
+      battery_screen_off_delay(
+          base::TimeDelta::FromMilliseconds(kUnsetDelayMs)),
+      battery_screen_lock_delay(
+          base::TimeDelta::FromMilliseconds(kUnsetDelayMs)),
+      battery_idle_delay(base::TimeDelta::FromMilliseconds(kUnsetDelayMs)),
+      idle_action(ACTION_UNSET),
+      lid_closed_action(ACTION_UNSET),
+      use_audio_activity(BOOL_UNSET),
+      use_video_activity(BOOL_UNSET),
+      presentation_idle_delay_factor(kUnsetPresentationIdleDelayFactor) {
+}
+
+PowerPolicyController::PowerPolicyController(PowerManagerClient* client)
+    : client_(client) {
+  ResetPolicy();
+}
+
+PowerPolicyController::~PowerPolicyController() {
+  ResetPolicy();
+  client_ = NULL;
+}
+
+void PowerPolicyController::UpdatePolicyFromPrefs(const PolicyPrefs& prefs) {
+  prefs_ = prefs;
+  SendPolicy();
+}
+
+void PowerPolicyController::ResetPolicy() {
+  prefs_ = PolicyPrefs();
+  SendPolicy();
+}
+
+void PowerPolicyController::SendPolicy() {
+  power_manager::PowerManagementPolicy policy;
+
+  power_manager::PowerManagementPolicy::Delays* delays =
+      policy.mutable_ac_delays();
+  SET_DELAY_FROM_PREFS(ac_screen_dim_delay, screen_dim_ms, delays);
+  SET_DELAY_FROM_PREFS(ac_screen_off_delay, screen_off_ms, delays);
+  SET_DELAY_FROM_PREFS(ac_screen_lock_delay, screen_lock_ms, delays);
+  SET_DELAY_FROM_PREFS(ac_idle_delay, idle_ms, delays);
+
+  delays = policy.mutable_battery_delays();
+  SET_DELAY_FROM_PREFS(battery_screen_dim_delay, screen_dim_ms, delays);
+  SET_DELAY_FROM_PREFS(battery_screen_off_delay, screen_off_ms, delays);
+  SET_DELAY_FROM_PREFS(battery_screen_lock_delay, screen_lock_ms, delays);
+  SET_DELAY_FROM_PREFS(battery_idle_delay, idle_ms, delays);
+
+  if (prefs_.idle_action != ACTION_UNSET)
+    policy.set_idle_action(GetProtoAction(prefs_.idle_action));
+  if (prefs_.lid_closed_action != ACTION_UNSET)
+    policy.set_lid_closed_action(GetProtoAction(prefs_.lid_closed_action));
+  if (prefs_.presentation_idle_delay_factor >= 1.0) {
+    policy.set_presentation_idle_delay_factor(
+        prefs_.presentation_idle_delay_factor);
+  }
+
+  client_->SetPolicy(policy);
+}
+
+}  // namespace chromeos