1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/system/power/power_button_display_controller.h"
#include "ash/accessibility/accessibility_controller.h"
#include "ash/media/media_controller_impl.h"
#include "ash/shell.h"
#include "ash/system/power/scoped_backlights_forced_off.h"
#include "base/time/tick_clock.h"
#include "chromeos/dbus/power/power_policy_controller.h"
#include "ui/display/screen.h"
#include "ui/events/devices/device_data_manager.h"
#include "ui/events/devices/stylus_state.h"
#include "ui/events/event.h"
namespace ash {
PowerButtonDisplayController::PowerButtonDisplayController(
BacklightsForcedOffSetter* backlights_forced_off_setter,
const base::TickClock* tick_clock)
: backlights_forced_off_setter_(backlights_forced_off_setter),
tick_clock_(tick_clock) {
chromeos::PowerManagerClient::Get()->AddObserver(this);
ui::DeviceDataManager::GetInstance()->AddObserver(this);
Shell::Get()->AddPreTargetHandler(this, ui::EventTarget::Priority::kSystem);
backlights_forced_off_observation_.Observe(
backlights_forced_off_setter_.get());
}
PowerButtonDisplayController::~PowerButtonDisplayController() {
Shell::Get()->RemovePreTargetHandler(this);
ui::DeviceDataManager::GetInstance()->RemoveObserver(this);
chromeos::PowerManagerClient::Get()->RemoveObserver(this);
}
bool PowerButtonDisplayController::IsScreenOn() const {
return backlights_forced_off_setter_->GetScreenBacklightState() ==
ScreenBacklightState::ON;
}
void PowerButtonDisplayController::SetBacklightsForcedOff(bool forced_off) {
if ((backlights_forced_off_ != nullptr) == forced_off)
return;
send_accessibility_alert_on_backlights_forced_off_change_ = true;
if (forced_off) {
backlights_forced_off_ =
backlights_forced_off_setter_->ForceBacklightsOff();
} else {
backlights_forced_off_.reset();
}
// Let PowerPolicyController update inactivity delays:
// https://crbug.com/812504
chromeos::PowerPolicyController::Get()
->HandleBacklightsForcedOffForPowerButton(forced_off);
if (forced_off)
Shell::Get()->media_controller()->SuspendMediaSessions();
}
void PowerButtonDisplayController::OnBacklightsForcedOffChanged(
bool forced_off) {
if (send_accessibility_alert_on_backlights_forced_off_change_) {
Shell::Get()->accessibility_controller()->TriggerAccessibilityAlert(
forced_off ? AccessibilityAlert::SCREEN_OFF
: AccessibilityAlert::SCREEN_ON);
}
send_accessibility_alert_on_backlights_forced_off_change_ = false;
}
void PowerButtonDisplayController::OnScreenBacklightStateChanged(
ScreenBacklightState screen_backlight_state) {
screen_state_last_changed_ = tick_clock_->NowTicks();
}
void PowerButtonDisplayController::SuspendDone(base::TimeDelta sleep_duration) {
// Stop forcing backlights off on resume to handle situations where the power
// button resumed but we didn't receive the event (crbug.com/735291).
SetBacklightsForcedOff(false);
}
void PowerButtonDisplayController::LidEventReceived(
chromeos::PowerManagerClient::LidState state,
base::TimeTicks timestamp) {
SetBacklightsForcedOff(false);
}
void PowerButtonDisplayController::TabletModeEventReceived(
chromeos::PowerManagerClient::TabletMode mode,
base::TimeTicks timestamp) {
SetBacklightsForcedOff(false);
}
void PowerButtonDisplayController::OnKeyEvent(ui::KeyEvent* event) {
// Ignore key events generated by the power button since power button activity
// is already handled elsewhere.
if (event->key_code() == ui::VKEY_POWER)
return;
if (!display::Screen::GetScreen()->InTabletMode()) {
SetBacklightsForcedOff(false);
}
}
void PowerButtonDisplayController::OnMouseEvent(ui::MouseEvent* event) {
if (event->flags() & ui::EF_IS_SYNTHESIZED)
return;
if (!display::Screen::GetScreen()->InTabletMode()) {
SetBacklightsForcedOff(false);
}
}
void PowerButtonDisplayController::OnStylusStateChanged(ui::StylusState state) {
if (state == ui::StylusState::REMOVED)
SetBacklightsForcedOff(false);
}
} // namespace ash
|
