| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SensorProxy_h |
| #define SensorProxy_h |
| |
| #include "device/generic_sensor/public/interfaces/sensor.mojom-blink.h" |
| #include "device/generic_sensor/public/interfaces/sensor_provider.mojom-blink.h" |
| #include "mojo/public/cpp/bindings/binding.h" |
| #include "platform/Supplementable.h" |
| #include "platform/heap/Handle.h" |
| |
| namespace blink { |
| |
| class SensorProviderProxy; |
| |
| // This class wraps 'Sensor' mojo interface and used by multiple |
| // JS sensor instances of the same type (within a single frame). |
| class SensorProxy final |
| : public GarbageCollectedFinalized<SensorProxy> |
| , public device::mojom::blink::SensorClient { |
| USING_PRE_FINALIZER(SensorProxy, dispose); |
| WTF_MAKE_NONCOPYABLE(SensorProxy); |
| public: |
| class Observer : public GarbageCollectedMixin { |
| public: |
| // Has valid 'Sensor' binding, {add, remove}Configuration() |
| // methods can be called. |
| virtual void onSensorInitialized() {} |
| // Platfrom sensort reading has changed (for 'ONCHANGE' reporting mode). |
| virtual void onSensorReadingChanged() {} |
| // An error has occurred. |
| virtual void onSensorError() {} |
| }; |
| |
| ~SensorProxy(); |
| |
| void dispose(); |
| |
| void addObserver(Observer*); |
| void removeObserver(Observer*); |
| |
| void initialize(); |
| |
| bool isInitializing() const { return m_state == Initializing; } |
| bool isInitialized() const { return m_state == Initialized; } |
| |
| void addConfiguration(device::mojom::blink::SensorConfigurationPtr, std::unique_ptr<Function<void(bool)>>); |
| void removeConfiguration(device::mojom::blink::SensorConfigurationPtr, std::unique_ptr<Function<void(bool)>>); |
| |
| device::mojom::blink::SensorType type() const { return m_type; } |
| device::mojom::blink::ReportingMode reportingMode() const { return m_mode; } |
| |
| struct Reading { |
| double timestamp; |
| double reading[3]; |
| }; |
| static_assert(sizeof(Reading) == device::mojom::blink::SensorReadBuffer::kReadBufferSize, "Check reading size"); |
| |
| const Reading& reading() const { return m_reading; } |
| |
| // Updates internal reading from shared buffer. |
| void updateInternalReading(); |
| |
| DECLARE_VIRTUAL_TRACE(); |
| |
| private: |
| friend class SensorProviderProxy; |
| SensorProxy(device::mojom::blink::SensorType, SensorProviderProxy*); |
| |
| // device::mojom::blink::SensorClient overrides. |
| void RaiseError() override; |
| void SensorReadingChanged() override; |
| |
| // Generic handler for a fatal error. |
| void handleSensorError(); |
| |
| void onSensorCreated(device::mojom::blink::SensorReadBufferPtr, device::mojom::blink::SensorClientRequest); |
| |
| device::mojom::blink::SensorType m_type; |
| device::mojom::blink::ReportingMode m_mode; |
| Member<SensorProviderProxy> m_provider; |
| using ObserversSet = HeapHashSet<WeakMember<Observer>>; |
| ObserversSet m_observers; |
| |
| device::mojom::blink::SensorPtr m_sensor; |
| mojo::Binding<device::mojom::blink::SensorClient> m_clientBinding; |
| enum State { |
| Uninitialized, |
| Initializing, |
| Initialized |
| }; |
| State m_state; |
| mojo::ScopedSharedBufferHandle m_sharedBufferHandle; |
| mojo::ScopedSharedBufferMapping m_sharedBuffer; |
| Reading m_reading; |
| }; |
| |
| } // namespace blink |
| |
| #endif // SensorProxy_h |