| // 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 THIRD_PARTY_BLINK_RENDERER_MODULES_SENSOR_SENSOR_PROXY_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_MODULES_SENSOR_SENSOR_PROXY_H_ |
| |
| #include "services/device/public/cpp/generic_sensor/sensor_reading.h" |
| #include "services/device/public/cpp/generic_sensor/sensor_reading_shared_buffer_reader.h" |
| #include "services/device/public/mojom/sensor.mojom-blink.h" |
| #include "services/device/public/mojom/sensor_provider.mojom-blink.h" |
| #include "third_party/blink/renderer/core/page/focus_changed_observer.h" |
| #include "third_party/blink/renderer/core/page/page_visibility_observer.h" |
| #include "third_party/blink/renderer/platform/bindings/exception_code.h" |
| #include "third_party/blink/renderer/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 : public GarbageCollectedFinalized<SensorProxy>, |
| public PageVisibilityObserver, |
| public FocusChangedObserver { |
| WTF_MAKE_NONCOPYABLE(SensorProxy); |
| USING_GARBAGE_COLLECTED_MIXIN(SensorProxy); |
| |
| public: |
| class Observer : public GarbageCollectedMixin { |
| public: |
| // Has valid 'Sensor' binding, {add, remove}Configuration() |
| // methods can be called. |
| virtual void OnSensorInitialized() {} |
| // Observer should update its cached reading and send 'onchange' |
| // event if needed. |
| virtual void OnSensorReadingChanged() {} |
| // An error has occurred. |
| virtual void OnSensorError(ExceptionCode, |
| const String& sanitized_message, |
| const String& unsanitized_message) {} |
| }; |
| |
| ~SensorProxy() override; |
| |
| void Dispose(); |
| |
| void AddObserver(Observer*); |
| void RemoveObserver(Observer*); |
| |
| // Public methods to be implemented by descendants. |
| virtual void Initialize() = 0; |
| virtual void AddConfiguration(device::mojom::blink::SensorConfigurationPtr, |
| base::OnceCallback<void(bool)>) = 0; |
| virtual void RemoveConfiguration( |
| device::mojom::blink::SensorConfigurationPtr) = 0; |
| virtual double GetDefaultFrequency() const = 0; |
| virtual std::pair<double, double> GetFrequencyLimits() const = 0; |
| virtual void SetReadingForInspector(const device::SensorReading&) {} |
| |
| virtual void ReportError(ExceptionCode code, const String& description); |
| // Getters. |
| bool IsInitializing() const { return state_ == kInitializing; } |
| bool IsInitialized() const { return state_ == kInitialized; } |
| device::mojom::blink::SensorType type() const { return type_; } |
| // Note: do not use the stored references to the returned value |
| // outside the current call chain. |
| const device::SensorReading& GetReading(bool remapped = false) const; |
| |
| // Detach from the local frame's SensorProviderProxy. |
| void Detach(); |
| |
| void Trace(blink::Visitor*) override; |
| |
| static const char kDefaultErrorDescription[]; |
| |
| protected: |
| SensorProxy(device::mojom::blink::SensorType, SensorProviderProxy*, Page*); |
| void UpdateSuspendedStatus(); |
| |
| // Protected methods to be implemented by descendants. |
| virtual void Suspend() {} |
| virtual void Resume() {} |
| |
| device::mojom::blink::SensorProvider* sensor_provider() const; |
| |
| device::mojom::blink::SensorType type_; |
| using ObserversSet = HeapHashSet<WeakMember<Observer>>; |
| ObserversSet observers_; |
| |
| enum State { kUninitialized, kInitializing, kInitialized }; |
| State state_ = kUninitialized; |
| |
| device::SensorReading reading_; |
| mutable device::SensorReading remapped_reading_; |
| |
| using ReadingBuffer = device::SensorReadingSharedBuffer; |
| |
| private: |
| // PageVisibilityObserver overrides. |
| void PageVisibilityChanged() override; |
| |
| // FocusChangedObserver overrides. |
| void FocusedFrameChanged() override; |
| |
| // Returns true if conditions to suspend sensor reading updates are met. |
| bool ShouldSuspendUpdates() const; |
| |
| Member<SensorProviderProxy> provider_; |
| bool detached_ = false; |
| |
| static_assert( |
| sizeof(ReadingBuffer) == |
| device::mojom::blink::SensorInitParams::kReadBufferSizeForTests, |
| "Check reading buffer size for tests"); |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_MODULES_SENSOR_SENSOR_PROXY_H_ |