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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/modules/battery/battery_manager.h"
#include "third_party/blink/public/mojom/frame/lifecycle.mojom-blink.h"
#include "third_party/blink/renderer/core/dom/dom_exception.h"
#include "third_party/blink/renderer/core/dom/events/event.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/navigator.h"
#include "third_party/blink/renderer/core/frame/web_feature.h"
#include "third_party/blink/renderer/modules/battery/battery_dispatcher.h"
namespace blink {
const char BatteryManager::kSupplementName[] = "BatteryManager";
// static
ScriptPromise<BatteryManager> BatteryManager::getBattery(
ScriptState* script_state,
Navigator& navigator) {
if (!navigator.DomWindow())
return EmptyPromise();
// Check to see if this request would be blocked according to the Battery
// Status API specification.
LocalDOMWindow* window = navigator.DomWindow();
// TODO(crbug.com/1007264, crbug.com/1290231): remove fenced frame specific
// code when permission policy implements the battery status API support.
if (window->GetFrame()->IsInFencedFrameTree()) {
return ScriptPromise<BatteryManager>::RejectWithDOMException(
script_state,
DOMException::Create(
"getBattery is not allowed in a fenced frame tree.",
DOMException::GetErrorName(DOMExceptionCode::kNotAllowedError)));
}
window->GetFrame()->CountUseIfFeatureWouldBeBlockedByPermissionsPolicy(
WebFeature::kBatteryStatusCrossOrigin,
WebFeature::kBatteryStatusSameOriginABA);
auto* supplement = Supplement<Navigator>::From<BatteryManager>(navigator);
if (!supplement) {
supplement = MakeGarbageCollected<BatteryManager>(navigator);
ProvideTo(navigator, supplement);
}
return supplement->StartRequest(script_state);
}
BatteryManager::~BatteryManager() = default;
BatteryManager::BatteryManager(Navigator& navigator)
: ActiveScriptWrappable<BatteryManager>({}),
Supplement<Navigator>(navigator),
ExecutionContextLifecycleStateObserver(navigator.DomWindow()),
PlatformEventController(*navigator.DomWindow()),
battery_dispatcher_(
MakeGarbageCollected<BatteryDispatcher>(navigator.DomWindow())) {
UpdateStateIfNeeded();
}
ScriptPromise<BatteryManager> BatteryManager::StartRequest(
ScriptState* script_state) {
if (!battery_property_) {
battery_property_ = MakeGarbageCollected<BatteryProperty>(
ExecutionContext::From(script_state));
// If the context is in a stopped state already, do not start updating.
if (!GetExecutionContext() || GetExecutionContext()->IsContextDestroyed()) {
battery_property_->Resolve(this);
} else {
has_event_listener_ = true;
StartUpdating();
}
}
return battery_property_->Promise(script_state->World());
}
bool BatteryManager::charging() {
return battery_status_.Charging();
}
double BatteryManager::chargingTime() {
return battery_status_.charging_time().InSecondsF();
}
double BatteryManager::dischargingTime() {
return battery_status_.discharging_time().InSecondsF();
}
double BatteryManager::level() {
return battery_status_.Level();
}
void BatteryManager::DidUpdateData() {
DCHECK(battery_property_);
BatteryStatus old_status = battery_status_;
battery_status_ = *battery_dispatcher_->LatestData();
if (battery_property_->GetState() == BatteryProperty::kPending) {
battery_property_->Resolve(this);
return;
}
DCHECK(GetExecutionContext());
if (GetExecutionContext()->IsContextPaused() ||
GetExecutionContext()->IsContextDestroyed()) {
return;
}
if (battery_status_.Charging() != old_status.Charging())
DispatchEvent(*Event::Create(event_type_names::kChargingchange));
if (battery_status_.charging_time() != old_status.charging_time())
DispatchEvent(*Event::Create(event_type_names::kChargingtimechange));
if (battery_status_.discharging_time() != old_status.discharging_time())
DispatchEvent(*Event::Create(event_type_names::kDischargingtimechange));
if (battery_status_.Level() != old_status.Level())
DispatchEvent(*Event::Create(event_type_names::kLevelchange));
}
void BatteryManager::RegisterWithDispatcher() {
battery_dispatcher_->AddController(this, DomWindow());
}
void BatteryManager::UnregisterWithDispatcher() {
battery_dispatcher_->RemoveController(this);
}
bool BatteryManager::HasLastData() {
return battery_dispatcher_->LatestData();
}
void BatteryManager::ContextLifecycleStateChanged(
mojom::FrameLifecycleState state) {
if (state == mojom::FrameLifecycleState::kRunning) {
has_event_listener_ = true;
StartUpdating();
} else {
has_event_listener_ = false;
StopUpdating();
}
}
void BatteryManager::ContextDestroyed() {
has_event_listener_ = false;
battery_property_ = nullptr;
StopUpdating();
}
bool BatteryManager::HasPendingActivity() const {
// Prevent V8 from garbage collecting the wrapper object if there are
// event listeners or pending promises attached to it.
return HasEventListeners() ||
(battery_property_ &&
battery_property_->GetState() == BatteryProperty::kPending);
}
void BatteryManager::Trace(Visitor* visitor) const {
visitor->Trace(battery_property_);
visitor->Trace(battery_dispatcher_);
Supplement<Navigator>::Trace(visitor);
PlatformEventController::Trace(visitor);
EventTarget::Trace(visitor);
ExecutionContextLifecycleStateObserver::Trace(visitor);
}
} // namespace blink
|
