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// Copyright (c) 2012 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 <utility>
#include <vector>
#include "base/callback.h"
#include "base/files/scoped_file.h"
#include "base/location.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/optional.h"
#include "base/time/time.h"
#include "chromeos/chromeos_export.h"
#include "chromeos/dbus/dbus_client.h"
#include "chromeos/dbus/dbus_client_implementation_type.h"
#include "chromeos/dbus/dbus_method_call_status.h"
#include "chromeos/dbus/power_manager/policy.pb.h"
#include "chromeos/dbus/power_manager/power_supply_properties.pb.h"
#include "chromeos/dbus/power_manager/suspend.pb.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
namespace power_manager {
class BacklightBrightnessChange;
class ScreenIdleState;
} // namespace power_manager
namespace chromeos {
// PowerManagerClient is used to communicate with the power manager.
class CHROMEOS_EXPORT PowerManagerClient : public DBusClient {
using TimerId = int32_t;
enum class LidState {
enum class TabletMode {
struct SwitchStates {
LidState lid_state;
TabletMode tablet_mode;
// Interface for observing changes from the power manager.
class Observer {
virtual ~Observer() {}
// Called if the power manager process restarts.
virtual void PowerManagerRestarted() {}
// Called when the screen brightness is changed.
virtual void ScreenBrightnessChanged(
const power_manager::BacklightBrightnessChange& change) {}
// Called when the keyboard brightness is changed.
virtual void KeyboardBrightnessChanged(
const power_manager::BacklightBrightnessChange& change) {}
// Called when screen-related inactivity timeouts are triggered or reset.
virtual void ScreenIdleStateChanged(
const power_manager::ScreenIdleState& proto) {}
// Called when powerd announces a change to the current inactivity delays.
// Some or all of these delays may be temporarily ignored due to e.g. wake
// locks or audio activity.
virtual void InactivityDelaysChanged(
const power_manager::PowerManagementPolicy::Delays& delays) {}
// Called when peripheral device battery status is received.
// |path| is the sysfs path for the battery of the peripheral device.
// |name| is the human readble name of the device.
// |level| within [0, 100] represents the device battery level and -1
// means an unknown level or device is disconnected.
virtual void PeripheralBatteryStatusReceived(const std::string& path,
const std::string& name,
int level) {}
// Called when updated information about the power supply is available.
// The status is automatically updated periodically, but
// RequestStatusUpdate() can be used to trigger an immediate update.
virtual void PowerChanged(
const power_manager::PowerSupplyProperties& proto) {}
// Called when the system is about to suspend. Suspend is deferred until
// all observers' implementations of this method have finished running.
// If an observer wishes to asynchronously delay suspend,
// PowerManagerClient::GetSuspendReadinessCallback() may be called from
// within SuspendImminent(). The returned callback must be called once
// the observer is ready for suspend.
virtual void SuspendImminent(
power_manager::SuspendImminent::Reason reason) {}
// Called when a suspend attempt (previously announced via
// SuspendImminent()) has completed. The system may not have actually
// suspended (if e.g. the user canceled the suspend attempt).
virtual void SuspendDone(const base::TimeDelta& sleep_duration) {}
// Called when the system is about to resuspend from a dark resume. Like
// SuspendImminent(), the suspend will be deferred until all observers have
// finished running and those observers that wish to asynchronously delay
// the suspend should call PowerManagerClient::GetSuspendReadinessCallback()
// from within this method. The returned callback should be run once the
// observer is ready for suspend.
virtual void DarkSuspendImminent() {}
// Called when the power button is pressed or released.
virtual void PowerButtonEventReceived(bool down,
const base::TimeTicks& timestamp) {}
// Called when the device's lid is opened or closed. LidState::NOT_PRESENT
// is never passed.
virtual void LidEventReceived(LidState state,
const base::TimeTicks& timestamp) {}
// Called when the device's tablet mode switch is on or off.
// TabletMode::UNSUPPORTED is never passed.
virtual void TabletModeEventReceived(TabletMode mode,
const base::TimeTicks& timestamp) {}
// Called just before the screen is dimmed in response to user inactivity.
virtual void ScreenDimImminent() {}
// Called when the idle action will be performed after
// |time_until_idle_action|.
virtual void IdleActionImminent(
const base::TimeDelta& time_until_idle_action) {}
// Called after IdleActionImminent() when the inactivity timer is reset
// before the idle action has been performed.
virtual void IdleActionDeferred() {}
// Adds and removes the observer.
virtual void AddObserver(Observer* observer) = 0;
virtual void RemoveObserver(Observer* observer) = 0;
virtual bool HasObserver(const Observer* observer) const = 0;
// Interface for managing the power consumption of renderer processes.
class RenderProcessManagerDelegate {
virtual ~RenderProcessManagerDelegate() {}
// Called when a suspend attempt is imminent but after all registered
// observers have reported readiness to suspend. This is only called for
// suspends from the fully powered on state and not for suspends from dark
// resume.
virtual void SuspendImminent() = 0;
// Called when a previously announced suspend attempt has completed but
// before observers are notified about it.
virtual void SuspendDone() = 0;
// Sets the PowerManagerClient's RenderProcessManagerDelegate. There can only
// be one delegate.
virtual void SetRenderProcessManagerDelegate(
base::WeakPtr<RenderProcessManagerDelegate> delegate) = 0;
// Decreases the screen brightness. |allow_off| controls whether or not
// it's allowed to turn off the back light.
virtual void DecreaseScreenBrightness(bool allow_off) = 0;
// Increases the screen brightness.
virtual void IncreaseScreenBrightness() = 0;
// Set the screen brightness to |percent|, in the range [0.0, 100.0].
// If |gradual| is true, the transition will be animated.
virtual void SetScreenBrightnessPercent(double percent, bool gradual) = 0;
// Asynchronously gets the current screen brightness, in the range
// [0.0, 100.0]. On error (e.g. powerd not running), |callback| will be run
// with nullopt.
virtual void GetScreenBrightnessPercent(
DBusMethodCallback<double> callback) = 0;
// Decreases the keyboard brightness.
virtual void DecreaseKeyboardBrightness() = 0;
// Increases the keyboard brightness.
virtual void IncreaseKeyboardBrightness() = 0;
// Similar to GetScreenBrightnessPercent, but gets the keyboard brightness
// instead.
virtual void GetKeyboardBrightnessPercent(
DBusMethodCallback<double> callback) = 0;
// Returns the last power status that was received from D-Bus, if any.
virtual const base::Optional<power_manager::PowerSupplyProperties>&
GetLastStatus() = 0;
// Requests an updated copy of the power status. Observer::PowerChanged()
// will be called asynchronously.
virtual void RequestStatusUpdate() = 0;
// Requests suspend of the system.
virtual void RequestSuspend() = 0;
// Requests restart of the system. |description| contains a human-readable
// string describing the source of the request that will be logged by powerd.
virtual void RequestRestart(power_manager::RequestRestartReason reason,
const std::string& description) = 0;
// Requests shutdown of the system. |description| contains a human-readable
// string describing the source of the request that will be logged by powerd.
virtual void RequestShutdown(power_manager::RequestShutdownReason reason,
const std::string& description) = 0;
// Notifies the power manager that the user is active (i.e. generating input
// events).
virtual void NotifyUserActivity(power_manager::UserActivityType type) = 0;
// Notifies the power manager that a video is currently playing. It also
// includes whether or not the containing window for the video is fullscreen.
virtual void NotifyVideoActivity(bool is_fullscreen) = 0;
// Tells the power manager to begin using |policy|.
virtual void SetPolicy(
const power_manager::PowerManagementPolicy& policy) = 0;
// Tells powerd whether or not we are in a projecting mode. This is used to
// adjust idleness thresholds and derived, on this side, from the number of
// video outputs attached.
virtual void SetIsProjecting(bool is_projecting) = 0;
// Tells powerd to change the power source to the given ID. An empty string
// causes powerd to switch to using the battery on devices with type-C ports.
virtual void SetPowerSource(const std::string& id) = 0;
// Forces the display and (if present) keyboard backlights to |forced_off|.
// This method doesn't support multiple callers. Instead of calling it
// directly, please use ash::BacklightsForcedOffSetter.
virtual void SetBacklightsForcedOff(bool forced_off) = 0;
// Gets the display and (if present) keyboard backlights' forced-off state. On
// error (e.g. powerd not running), |callback| will be called with nullopt.
virtual void GetBacklightsForcedOff(DBusMethodCallback<bool> callback) = 0;
// Asynchronously fetches the current state of various hardware switches (e.g.
// the lid switch and the tablet-mode switch). On error (e.g. powerd not
// running), |callback| will be called with nullopt.
virtual void GetSwitchStates(DBusMethodCallback<SwitchStates> callback) = 0;
// Gets the inactivity delays currently used by powerd. Some or all of these
// delays may be temporarily ignored due to e.g. wake locks or audio activity.
virtual void GetInactivityDelays(
callback) = 0;
// Returns a callback that can be called by an observer to report readiness
// for suspend. See Observer::SuspendImminent().
virtual base::Closure GetSuspendReadinessCallback(
const base::Location& from_where) = 0;
// Returns the number of callbacks returned by GetSuspendReadinessCallback()
// for the current suspend attempt but not yet called. Used by tests.
virtual int GetNumPendingSuspendReadinessCallbacks() = 0;
// Creates timers corresponding to clocks present in |arc_timer_requests|.
// ScopedFDs are used to indicate timer expiration as described in
// |StartArcTimer|. Aysnchronously runs |callback| with the created timers'
// ids corresponding to all clocks in the arguments i.e timer id at index 0
// corresponds to the clock id at position 0 in |arc_timer_requests|. Only one
// timer per clock is allowed per tag, asynchronously runs |callback| with
// base::nullopt if the same clock is present more than once in the arguments.
// Also, runs |callback| with base::nullopt if timers are already created for
// |tag|.
virtual void CreateArcTimers(
const std::string& tag,
std::vector<std::pair<clockid_t, base::ScopedFD>> arc_timer_requests,
DBusMethodCallback<std::vector<TimerId>> callback) = 0;
// Starts a timer created via |CreateArcTimers|. Starts the timer of type
// |clock_id| (from <sys/timerfd.h>) to run at |absolute_expiration_time| in
// the future. If the timer is already running, it will be replaced.
// Notification will be performed as an 8-byte write to the associated
// expiration fd. Asynchronously runs |callback| with true iff the timer can
// be started successfully or false otherwise.
virtual void StartArcTimer(TimerId timer_id,
base::TimeTicks absolute_expiration_time,
VoidDBusMethodCallback callback) = 0;
// Deletes all timer state and clears any pending timers started by
// |StartArcTimer|. Asynchronously runs |callback| with true on success or
// false on failure.
virtual void DeleteArcTimers(const std::string& tag,
VoidDBusMethodCallback callback) = 0;
// Instructs powerd to defer dimming the screen. This only has an effect when
// called shortly (i.e. seconds) after observers have received
// ScreenDimImminent notifications.
virtual void DeferScreenDim() = 0;
// Creates the instance.
static PowerManagerClient* Create(DBusClientImplementationType type);
~PowerManagerClient() override;
// Needs to call DBusClient::Init().
friend class PowerManagerClientTest;
// Create() should be used instead.
} // namespace chromeos