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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 <memory>
#include <queue>
#include <string>
#include <utility>
#include <vector>
#include "base/callback_forward.h"
#include "base/containers/circular_deque.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/optional.h"
#include "base/time/time.h"
#include "chromeos/chromeos_export.h"
#include "chromeos/dbus/power_manager/backlight.pb.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 "chromeos/dbus/power_manager_client.h"
namespace chromeos {
// A fake implementation of PowerManagerClient. This remembers the policy passed
// to SetPolicy() and the user of this class can inspect the last set policy by
// get_policy().
class CHROMEOS_EXPORT FakePowerManagerClient : public PowerManagerClient {
~FakePowerManagerClient() override;
const power_manager::PowerManagementPolicy& policy() { return policy_; }
int num_request_restart_calls() const { return num_request_restart_calls_; }
int num_request_shutdown_calls() const { return num_request_shutdown_calls_; }
int num_set_policy_calls() const { return num_set_policy_calls_; }
int num_set_is_projecting_calls() const {
return num_set_is_projecting_calls_;
int num_defer_screen_dim_calls() const { return num_defer_screen_dim_calls_; }
double screen_brightness_percent() const {
return screen_brightness_percent_.value();
bool is_projecting() const { return is_projecting_; }
bool have_video_activity_report() const {
return !video_activity_reports_.empty();
bool backlights_forced_off() const { return backlights_forced_off_; }
int num_set_backlights_forced_off_calls() const {
return num_set_backlights_forced_off_calls_;
void set_enqueue_brightness_changes_on_backlights_forced_off(bool enqueue) {
enqueue_brightness_changes_on_backlights_forced_off_ = enqueue;
const std::queue<power_manager::BacklightBrightnessChange>&
pending_screen_brightness_changes() const {
return pending_screen_brightness_changes_;
void set_user_activity_callback(base::RepeatingClosure callback) {
user_activity_callback_ = std::move(callback);
// PowerManagerClient overrides:
void Init(dbus::Bus* bus) override;
void AddObserver(Observer* observer) override;
void RemoveObserver(Observer* observer) override;
bool HasObserver(const Observer* observer) const override;
void SetRenderProcessManagerDelegate(
base::WeakPtr<RenderProcessManagerDelegate> delegate) override;
void DecreaseScreenBrightness(bool allow_off) override;
void IncreaseScreenBrightness() override;
void SetScreenBrightnessPercent(double percent, bool gradual) override;
void GetScreenBrightnessPercent(DBusMethodCallback<double> callback) override;
void DecreaseKeyboardBrightness() override;
void IncreaseKeyboardBrightness() override;
void GetKeyboardBrightnessPercent(
DBusMethodCallback<double> callback) override;
const base::Optional<power_manager::PowerSupplyProperties>& GetLastStatus()
void RequestStatusUpdate() override;
void RequestSuspend() override;
void RequestRestart(power_manager::RequestRestartReason reason,
const std::string& description) override;
void RequestShutdown(power_manager::RequestShutdownReason reason,
const std::string& description) override;
void NotifyUserActivity(power_manager::UserActivityType type) override;
void NotifyVideoActivity(bool is_fullscreen) override;
void SetPolicy(const power_manager::PowerManagementPolicy& policy) override;
void SetIsProjecting(bool is_projecting) override;
void SetPowerSource(const std::string& id) override;
void SetBacklightsForcedOff(bool forced_off) override;
void GetBacklightsForcedOff(DBusMethodCallback<bool> callback) override;
void GetSwitchStates(DBusMethodCallback<SwitchStates> callback) override;
void GetInactivityDelays(
DBusMethodCallback<power_manager::PowerManagementPolicy::Delays> callback)
base::Closure GetSuspendReadinessCallback(
const base::Location& from_where) override;
int GetNumPendingSuspendReadinessCallbacks() override;
void CreateArcTimers(
const std::string& tag,
std::vector<std::pair<clockid_t, base::ScopedFD>> arc_timer_requests,
DBusMethodCallback<std::vector<TimerId>> callback) override;
void StartArcTimer(TimerId timer_id,
base::TimeTicks absolute_expiration_time,
VoidDBusMethodCallback callback) override;
void DeleteArcTimers(const std::string& tag,
VoidDBusMethodCallback callback) override;
void DeferScreenDim() override;
// Pops the first report from |video_activity_reports_|, returning whether the
// activity was fullscreen or not. There must be at least one report.
bool PopVideoActivityReport();
// Emulates the power manager announcing that the system is starting or
// completing a suspend attempt.
void SendSuspendImminent(power_manager::SuspendImminent::Reason reason);
void SendSuspendDone(base::TimeDelta sleep_duration = base::TimeDelta());
void SendDarkSuspendImminent();
// Emulates the power manager announcing that the system is changing the
// screen or keyboard brightness.
void SendScreenBrightnessChanged(
const power_manager::BacklightBrightnessChange& proto);
void SendKeyboardBrightnessChanged(
const power_manager::BacklightBrightnessChange& proto);
// Notifies observers about the screen idle state changing.
void SendScreenIdleStateChanged(const power_manager::ScreenIdleState& proto);
// Notifies observers that the power button has been pressed or released.
void SendPowerButtonEvent(bool down, const base::TimeTicks& timestamp);
// Notifies observers that the screen is about to be dimmed.
void SendScreenDimImminent();
// Sets |lid_state_| or |tablet_mode_| and notifies |observers_| about the
// change.
void SetLidState(LidState state, const base::TimeTicks& timestamp);
void SetTabletMode(TabletMode mode, const base::TimeTicks& timestamp);
// Sets |inactivity_delays_| and notifies |observers_| about the change.
void SetInactivityDelays(
const power_manager::PowerManagementPolicy::Delays& delays);
// Updates |props_| and notifies observers of its changes.
void UpdatePowerProperties(
const power_manager::PowerSupplyProperties& power_props);
// The PowerAPI requests system wake lock asynchronously. Test can run a
// RunLoop and set the quit closure by this function to make sure the wake
// lock has been created.
void SetPowerPolicyQuitClosure(base::OnceClosure quit_closure);
// Updates screen brightness to the first pending value in
// |pending_screen_brightness_changes_|.
// Returns whether the screen brightness change was applied - this will
// return false if there are no pending brightness changes.
bool ApplyPendingScreenBrightnessChange();
// Sets the screen brightness percent to be returned.
// The nullopt |percent| means an error. In case of success,
// |percent| must be in the range of [0, 100].
void set_screen_brightness_percent(const base::Optional<double>& percent) {
screen_brightness_percent_ = percent;
void set_keyboard_brightness_percent(const base::Optional<double>& percent) {
keyboard_brightness_percent_ = percent;
// Callback that will be run by asynchronous suspend delays to report
// readiness.
void HandleSuspendReadiness();
// Notifies |observers_| that |props_| has been updated.
void NotifyObservers();
base::ObserverList<Observer> observers_;
// Last policy passed to SetPolicy().
power_manager::PowerManagementPolicy policy_;
// Power status received from the power manager.
base::Optional<power_manager::PowerSupplyProperties> props_;
// Number of times that various methods have been called.
int num_request_restart_calls_ = 0;
int num_request_shutdown_calls_ = 0;
int num_set_policy_calls_ = 0;
int num_set_is_projecting_calls_ = 0;
int num_set_backlights_forced_off_calls_ = 0;
int num_defer_screen_dim_calls_ = 0;
// Number of pending suspend readiness callbacks.
int num_pending_suspend_readiness_callbacks_ = 0;
// Current screen brightness in the range [0.0, 100.0].
base::Optional<double> screen_brightness_percent_;
// Current keyboard brightness in the range [0.0, 100.0].
base::Optional<double> keyboard_brightness_percent_;
// Last screen brightness requested via SetScreenBrightnessPercent().
// Unlike |screen_brightness_percent_|, this value will not be changed by
// SetBacklightsForcedOff() method - a method that implicitly changes screen
// brightness.
// Initially set to an arbitrary non-null value.
double requested_screen_brightness_percent_ = 80;
// Last projecting state set in SetIsProjecting().
bool is_projecting_ = false;
// Display and keyboard backlights (if present) forced off state set in
// SetBacklightsForcedOff().
bool backlights_forced_off_ = false;
// Whether screen brightness changes in SetBacklightsForcedOff() should be
// enqueued.
// If not set, SetBacklightsForcedOff() will update current screen
// brightness and send a brightness change event (provided undimmed
// brightness percent is set).
// If set, brightness changes will be enqueued to
// |pending_screen_brightness_changes_|, and will have to be applied
// explicitly by calling ApplyPendingScreenBrightnessChange().
bool enqueue_brightness_changes_on_backlights_forced_off_ = false;
// Pending screen brightness changes caused by SetBacklightsForcedOff().
// ApplyPendingScreenBrightnessChange() applies the first pending change.
// Delays returned by GetInactivityDelays().
power_manager::PowerManagementPolicy::Delays inactivity_delays_;
// States returned by GetSwitchStates().
LidState lid_state_ = LidState::OPEN;
TabletMode tablet_mode_ = TabletMode::UNSUPPORTED;
// Monotonically increasing timer id assigned to created timers.
TimerId next_timer_id_ = 1;
// Represents the timer expiration fd associated with a timer id stored as
// the key. The fd is written to when the timer associated with the clock
// expires.
std::map<TimerId, base::ScopedFD> timer_expiration_fds_;
// Maps a client's tag to its list of timer ids.
std::map<std::string, std::vector<TimerId>> client_timer_ids_;
// Video activity reports that we were requested to send, in the order they
// were requested. True if fullscreen.
base::circular_deque<bool> video_activity_reports_;
// Delegate for managing power consumption of Chrome's renderer processes.
base::WeakPtr<RenderProcessManagerDelegate> render_process_manager_delegate_;
// If non-empty, called by SetPowerPolicy().
base::OnceClosure power_policy_quit_closure_;
// If non-empty, called by NotifyUserActivity().
base::RepeatingClosure user_activity_callback_;
// Note: This should remain the last member so it'll be destroyed and
// invalidate its weak pointers before any other members are destroyed.
base::WeakPtrFactory<FakePowerManagerClient> weak_ptr_factory_;
} // namespace chromeos