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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); | |
18 } | 17 } |
19 | 18 |
20 DEFINE_TRACE(SensorReading) | 19 DEFINE_TRACE(SensorReading) |
21 { | 20 { |
22 visitor->trace(m_sensorProxy); | 21 visitor->trace(m_sensorProxy); |
23 } | 22 } |
24 | 23 |
25 DOMHighResTimeStamp SensorReading::timeStamp(ScriptState* scriptState) const | 24 DOMHighResTimeStamp SensorReading::timeStamp(ScriptState* scriptState) const |
26 { | 25 { |
27 LocalDOMWindow* window = scriptState->domWindow(); | 26 LocalDOMWindow* window = scriptState->domWindow(); |
28 if (!window) | 27 if (!window) |
29 return 0.0; | 28 return 0.0; |
30 | 29 |
31 Performance* performance = DOMWindowPerformance::performance(*window); | 30 Performance* performance = DOMWindowPerformance::performance(*window); |
32 DCHECK(performance); | 31 DCHECK(performance); |
33 | 32 |
| 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 |
34 return performance->monotonicTimeToDOMHighResTimeStamp(m_sensorProxy->readin
g().timestamp); | 42 return performance->monotonicTimeToDOMHighResTimeStamp(m_sensorProxy->readin
g().timestamp); |
35 } | 43 } |
36 | 44 |
37 } // namespace blink | 45 } // namespace blink |
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