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// Copyright (c) 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 <map>
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "chromeos/chromeos_export.h"
#include "chromeos/dbus/power_manager/policy.pb.h"
#include "chromeos/dbus/power_manager_client.h"
namespace chromeos {
class DBusThreadManager;
// PowerPolicyController is responsible for sending Chrome's assorted power
// management preferences to the Chrome OS power manager.
class CHROMEOS_EXPORT PowerPolicyController
: public PowerManagerClient::Observer {
// Note: Do not change these values; they are used by preferences.
enum Action {
// Values of various power-management-related preferences.
struct PrefValues {
int ac_screen_dim_delay_ms;
int ac_screen_off_delay_ms;
int ac_screen_lock_delay_ms;
int ac_idle_warning_delay_ms;
int ac_idle_delay_ms;
int battery_screen_dim_delay_ms;
int battery_screen_off_delay_ms;
int battery_screen_lock_delay_ms;
int battery_idle_warning_delay_ms;
int battery_idle_delay_ms;
Action ac_idle_action;
Action battery_idle_action;
Action lid_closed_action;
bool use_audio_activity;
bool use_video_activity;
double ac_brightness_percent;
double battery_brightness_percent;
bool allow_screen_wake_locks;
bool enable_auto_screen_lock;
double presentation_screen_dim_delay_factor;
double user_activity_screen_dim_delay_factor;
bool wait_for_initial_user_activity;
// Returns a string describing |policy|. Useful for tests.
static std::string GetPolicyDebugString(
const power_manager::PowerManagementPolicy& policy);
// Delay in milliseconds between the screen being turned off and the screen
// being locked. Used if the |enable_auto_screen_lock| pref is set but
// |*_screen_lock_delay_ms| are unset or set to higher values than what this
// constant would imply.
static const int kScreenLockAfterOffDelayMs;
virtual ~PowerPolicyController();
void Init(DBusThreadManager* manager);
// Updates |prefs_policy_| with |values| and sends an updated policy.
void ApplyPrefs(const PrefValues& values);
// Registers a request to temporarily prevent the screen from getting
// dimmed or turned off or the system from suspending in response to user
// inactivity and sends an updated policy. |reason| is a human-readable
// description of the reason the lock was created. Returns a unique ID
// that can be passed to RemoveWakeLock() later.
int AddScreenWakeLock(const std::string& reason);
int AddSystemWakeLock(const std::string& reason);
// Unregisters a request previously created via AddScreenWakeLock() or
// AddSystemWakeLock() and sends an updated policy.
void RemoveWakeLock(int id);
// PowerManagerClient::Observer implementation:
virtual void PowerManagerRestarted() OVERRIDE;
friend class PowerPrefsTest;
typedef std::map<int, std::string> WakeLockMap;
// Sends a policy based on |prefs_policy_| to the power manager.
void SendCurrentPolicy();
PowerManagerClient* client_; // weak
// Policy derived from values passed to ApplyPrefs().
power_manager::PowerManagementPolicy prefs_policy_;
// Was ApplyPrefs() called?
bool prefs_were_set_;
// Maps from an ID representing a request to prevent the screen from
// getting dimmed or turned off or to prevent the system from suspending
// to the reason for the request.
WakeLockMap screen_wake_locks_;
WakeLockMap system_wake_locks_;
// Should entries in |screen_wake_locks_| be honored? If false, screen
// wake locks are just treated as system wake locks instead.
bool honor_screen_wake_locks_;
// Next ID to be used by AddScreenWakeLock() or AddSystemWakeLock().
int next_wake_lock_id_;
} // namespace chromeos