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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "modules/sensor/SensorReading.h" | 5 #include "modules/sensor/SensorReading.h" |
6 | 6 |
7 #include "core/dom/ExecutionContext.h" | 7 #include "core/dom/ExecutionContext.h" |
8 #include "core/frame/LocalDOMWindow.h" | 8 #include "core/frame/LocalDOMWindow.h" |
9 #include "core/timing/DOMWindowPerformance.h" | 9 #include "core/timing/DOMWindowPerformance.h" |
10 #include "core/timing/Performance.h" | 10 #include "core/timing/Performance.h" |
11 | 11 |
12 namespace blink { | 12 namespace blink { |
13 | 13 |
14 SensorReading::SensorReading(SensorProxy* sensorProxy) | 14 SensorReading::SensorReading(SensorProxy* sensorProxy) |
15 : m_sensorProxy(sensorProxy) | 15 : m_sensorProxy(sensorProxy) |
16 { | 16 { |
| 17 DCHECK(m_sensorProxy); |
17 } | 18 } |
18 | 19 |
19 DEFINE_TRACE(SensorReading) | 20 DEFINE_TRACE(SensorReading) |
20 { | 21 { |
21 visitor->trace(m_sensorProxy); | 22 visitor->trace(m_sensorProxy); |
22 } | 23 } |
23 | 24 |
24 DOMHighResTimeStamp SensorReading::timeStamp(ScriptState* scriptState) const | 25 DOMHighResTimeStamp SensorReading::timeStamp(ScriptState* scriptState) const |
25 { | 26 { |
26 LocalDOMWindow* window = scriptState->domWindow(); | 27 LocalDOMWindow* window = scriptState->domWindow(); |
27 if (!window) | 28 if (!window) |
28 return 0.0; | 29 return 0.0; |
29 | 30 |
30 Performance* performance = DOMWindowPerformance::performance(*window); | 31 Performance* performance = DOMWindowPerformance::performance(*window); |
31 DCHECK(performance); | 32 DCHECK(performance); |
32 | 33 |
33 if (!m_sensorProxy) { | |
34 // In cases when SensorReading derived classes are constructed from JS | |
35 // side, e.g. to create syntetic SensorReadingEvent for testing | |
36 // purposes, |m_sensorProxy| will be null and SensorReading.timeStamp | |
37 // would return current DOMHighResTimeStamp, while reading value should | |
38 // be provided by derived classes. | |
39 return performance->now(); | |
40 } | |
41 | |
42 return performance->monotonicTimeToDOMHighResTimeStamp(m_sensorProxy->readin
g().timestamp); | 34 return performance->monotonicTimeToDOMHighResTimeStamp(m_sensorProxy->readin
g().timestamp); |
43 } | 35 } |
44 | 36 |
45 } // namespace blink | 37 } // namespace blink |
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