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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 DEVICE_SENSORS_PLATFORM_SENSOR_H_ |
| 6 #define DEVICE_SENSORS_PLATFORM_SENSOR_H_ |
| 7 |
| 8 #include <list> |
| 9 #include <map> |
| 10 |
| 11 #include "base/macros.h" |
| 12 #include "base/memory/ref_counted.h" |
| 13 #include "base/memory/weak_ptr.h" |
| 14 #include "base/observer_list.h" |
| 15 #include "mojo/public/cpp/system/buffer.h" |
| 16 |
| 17 namespace device { |
| 18 |
| 19 class PlatformSensorProvider; |
| 20 class PlatformSensorConfiguration; |
| 21 |
| 22 // Note: this enum must be in sync with mojo enum SensorType that is defined |
| 23 // in public/interfaces/sensor.mojom. |
| 24 enum class SensorType : int32_t { |
| 25 FIRST = 1, |
| 26 AMBIENT_LIGHT = FIRST, |
| 27 PROXIMITY, |
| 28 ACCELEROMETER, |
| 29 GYROSCOPE, |
| 30 PRESSURE, |
| 31 LAST = PRESSURE, |
| 32 }; |
| 33 |
| 34 // Note: this enum must be in sync with mojo enum ReportingMode that is defined |
| 35 // in public/interfaces/sensor.mojom. |
| 36 enum class ReportingMode : int32_t { |
| 37 ON_CHANGE, |
| 38 CONTINUOUS, |
| 39 }; |
| 40 |
| 41 // Base class for the sensors provided by the platform. Concrete instances of |
| 42 // this class are created by platform specific PlatformSensorProvider. |
| 43 class PlatformSensor : public base::RefCountedThreadSafe<PlatformSensor> { |
| 44 public: |
| 45 // The interface that must be implemented by PlatformSensor clients. |
| 46 class Client { |
| 47 public: |
| 48 virtual void OnSensorReadingChanged() {} |
| 49 virtual void OnSensorError() {} |
| 50 |
| 51 protected: |
| 52 virtual ~Client() {} |
| 53 }; |
| 54 |
| 55 virtual ReportingMode GetReportingMode() = 0; |
| 56 |
| 57 SensorType GetType() const; |
| 58 |
| 59 bool StartListening(Client* client, |
| 60 const PlatformSensorConfiguration& config); |
| 61 bool StopListening(Client* client, const PlatformSensorConfiguration& config); |
| 62 |
| 63 void AddClient(Client*); |
| 64 void RemoveClient(Client*); |
| 65 |
| 66 protected: |
| 67 virtual ~PlatformSensor(); |
| 68 PlatformSensor(SensorType type, |
| 69 mojo::ScopedSharedBufferMapping mapping, |
| 70 PlatformSensorProvider* provider); |
| 71 |
| 72 using ConfigMap = std::map<Client*, std::list<PlatformSensorConfiguration>>; |
| 73 |
| 74 virtual bool UpdateSensor(const ConfigMap& configurations) = 0; |
| 75 virtual bool CheckSensorConfiguration( |
| 76 const PlatformSensorConfiguration& configuration) = 0; |
| 77 |
| 78 void NotifySensorReadingChanged(); |
| 79 void NotifySensorError(); |
| 80 |
| 81 mojo::ScopedSharedBufferMapping shared_buffer_mapping_; |
| 82 |
| 83 private: |
| 84 friend class base::RefCountedThreadSafe<PlatformSensor>; |
| 85 |
| 86 SensorType type_; |
| 87 base::ObserverList<Client, true> clients_; |
| 88 ConfigMap config_map_; |
| 89 PlatformSensorProvider* provider_; |
| 90 base::WeakPtrFactory<PlatformSensor> weak_factory_; |
| 91 DISALLOW_COPY_AND_ASSIGN(PlatformSensor); |
| 92 }; |
| 93 |
| 94 } // namespace device |
| 95 |
| 96 #endif // DEVICE_SENSORS_PLATFORM_SENSOR_H_ |
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