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| 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 |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef SensorProxy_h |
| 6 #define SensorProxy_h |
| 7 |
| 8 #include "device/generic_sensor/public/interfaces/sensor.mojom-blink.h" |
| 9 #include "device/generic_sensor/public/interfaces/sensor_provider.mojom-blink.h" |
| 10 #include "mojo/public/cpp/bindings/binding.h" |
| 11 #include "platform/Supplementable.h" |
| 12 #include "platform/heap/Handle.h" |
| 13 |
| 14 namespace blink { |
| 15 |
| 16 class SensorProviderProxy; |
| 17 |
| 18 // This class wraps 'Sensor' mojo interface and used by multiple |
| 19 // JS sensor instances of the same type (within a single frame). |
| 20 class SensorProxy final |
| 21 : public GarbageCollectedFinalized<SensorProxy> |
| 22 , public device::mojom::blink::SensorClient { |
| 23 USING_PRE_FINALIZER(SensorProxy, dispose); |
| 24 WTF_MAKE_NONCOPYABLE(SensorProxy); |
| 25 public: |
| 26 class Observer : public GarbageCollectedMixin { |
| 27 public: |
| 28 // Has valid 'Sensor' binding, {add, remove}Configuration() |
| 29 // methods can be called. |
| 30 virtual void onSensorInitialized() {} |
| 31 // Platfrom sensort reading has changed (for 'ONCHANGE' reporting mode). |
| 32 virtual void onSensorReadingChanged() {} |
| 33 // An error has occurred. |
| 34 virtual void onSensorError() {} |
| 35 }; |
| 36 |
| 37 ~SensorProxy(); |
| 38 |
| 39 void dispose(); |
| 40 |
| 41 void addObserver(Observer*); |
| 42 void removeObserver(Observer*); |
| 43 |
| 44 void initialize(); |
| 45 |
| 46 bool isInitializing() const { return m_state == Initializing; } |
| 47 bool isInitialized() const { return m_state == Initialized; } |
| 48 |
| 49 void addConfiguration(device::mojom::blink::SensorConfigurationPtr, std::uni
que_ptr<Function<void(bool)>>); |
| 50 void removeConfiguration(device::mojom::blink::SensorConfigurationPtr, std::
unique_ptr<Function<void(bool)>>); |
| 51 |
| 52 void suspend(); |
| 53 void resume(); |
| 54 |
| 55 device::mojom::blink::SensorType type() const { return m_type; } |
| 56 device::mojom::blink::ReportingMode reportingMode() const { return m_mode; } |
| 57 |
| 58 struct Reading { |
| 59 double timestamp; |
| 60 double reading[3]; |
| 61 }; |
| 62 static_assert(sizeof(Reading) == device::mojom::blink::SensorReadBuffer::kRe
adBufferSize, "Check reading size"); |
| 63 |
| 64 const Reading& reading() const { return m_reading; } |
| 65 device::mojom::blink::SensorConfiguration* defaultConfiguration() const { re
turn m_defaultConfiguration.get(); } |
| 66 |
| 67 // Updates internal reading from shared buffer. |
| 68 void updateReading(); |
| 69 |
| 70 DECLARE_VIRTUAL_TRACE(); |
| 71 |
| 72 private: |
| 73 friend class SensorProviderProxy; |
| 74 SensorProxy(device::mojom::blink::SensorType, SensorProviderProxy*); |
| 75 |
| 76 // device::mojom::blink::SensorClient overrides. |
| 77 void RaiseError() override; |
| 78 void SensorReadingChanged() override; |
| 79 |
| 80 void handleSensorError(); |
| 81 |
| 82 void onSensorCreated(device::mojom::blink::SensorReadBufferPtr, device::mojo
m::blink::SensorClientRequest); |
| 83 void onDefaultConfiguration(device::mojom::blink::SensorConfigurationPtr); |
| 84 |
| 85 device::mojom::blink::SensorType m_type; |
| 86 device::mojom::blink::ReportingMode m_mode; |
| 87 Member<SensorProviderProxy> m_provider; |
| 88 using ObserversSet = HeapHashSet<WeakMember<Observer>>; |
| 89 ObserversSet m_observers; |
| 90 |
| 91 device::mojom::blink::SensorPtr m_sensor; |
| 92 mojo::Binding<device::mojom::blink::SensorClient> m_clientBinding; |
| 93 enum State { |
| 94 Uninitialized, |
| 95 Initializing, |
| 96 Initialized |
| 97 }; |
| 98 State m_state; |
| 99 mojo::ScopedSharedBufferHandle m_sharedBufferHandle; |
| 100 mojo::ScopedSharedBufferMapping m_sharedBuffer; |
| 101 device::mojom::blink::SensorConfigurationPtr m_defaultConfiguration; |
| 102 Reading m_reading; |
| 103 }; |
| 104 |
| 105 } // namespace blink |
| 106 |
| 107 #endif // SensorProxy_h |
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