[sensors] Introduce Generic Sensor API interfaces

device/sensors/public/interfaces/sensor_struct_traits.cc

Index: device/sensors/public/interfaces/sensor_struct_traits.cc
diff --git a/device/sensors/public/interfaces/sensor_struct_traits.cc b/device/sensors/public/interfaces/sensor_struct_traits.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4d6195aff67d4fb6b5321efc52cf466a6f81314a
--- /dev/null
+++ b/device/sensors/public/interfaces/sensor_struct_traits.cc
@@ -0,0 +1,124 @@
+// 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.
+
+#include "device/sensors/public/interfaces/sensor_struct_traits.h"
+
+#define CHECK_ENUM(VALUE1, VALUE2)                                            \
+  static_assert(static_cast<int32_t>(VALUE1) == static_cast<int32_t>(VALUE2), \
+                "Enum value mismatch.")
+
+namespace mojo {
+
+// static
+double StructTraits<device::mojom::SensorConfiguration,
+                    device::PlatformSensorConfiguration>::
+    frequency(const device::PlatformSensorConfiguration& input) {
+  return input.GetFrequency();

[dcheng, 2016/07/06 02:07:29]

It's OK to inline this one, since it's short and simple.

[shalamov, 2016/07/06 07:15:10]

Done.

+}
+
+// static
+bool StructTraits<device::mojom::SensorConfiguration,
+                  device::PlatformSensorConfiguration>::
+    Read(device::mojom::SensorConfigurationDataView data,
+         device::PlatformSensorConfiguration* out) {
+  out->SetFrequency(data.frequency());
+  return true;
+}
+
+// static asserts to verify that enums are in sync
+CHECK_ENUM(device::ReportingMode::ON_CHANGE,
+           device::mojom::ReportingMode::ON_CHANGE);
+CHECK_ENUM(device::ReportingMode::CONTINUOUS,
+           device::mojom::ReportingMode::CONTINUOUS);
+
+device::mojom::ReportingMode
+EnumTraits<device::mojom::ReportingMode, device::ReportingMode>::ToMojom(
+    device::ReportingMode reporting_mode) {
+  switch (reporting_mode) {
+    case device::ReportingMode::ON_CHANGE:
+      return device::mojom::ReportingMode::ON_CHANGE;
+    case device::ReportingMode::CONTINUOUS:
+      return device::mojom::ReportingMode::CONTINUOUS;
+  }
+
+  NOTREACHED();
+  return device::mojom::ReportingMode::ON_CHANGE;
+}
+
+// static
+bool EnumTraits<device::mojom::ReportingMode, device::ReportingMode>::FromMojom(
+    device::mojom::ReportingMode input,
+    device::ReportingMode* out) {
+  switch (input) {
+    case device::mojom::ReportingMode::ON_CHANGE:
+      *out = device::ReportingMode::ON_CHANGE;
+      return true;
+    case device::mojom::ReportingMode::CONTINUOUS:
+      *out = device::ReportingMode::CONTINUOUS;
+      return true;
+  }
+
+  NOTREACHED();
+  return false;
+}
+
+// static asserts to verify that enums are in sync
+CHECK_ENUM(device::SensorType::FIRST, device::mojom::SensorType::FIRST);
+CHECK_ENUM(device::SensorType::AMBIENT_LIGHT,
+           device::mojom::SensorType::AMBIENT_LIGHT);
+CHECK_ENUM(device::SensorType::PROXIMITY, device::mojom::SensorType::PROXIMITY);
+CHECK_ENUM(device::SensorType::ACCELEROMETER,
+           device::mojom::SensorType::ACCELEROMETER);
+CHECK_ENUM(device::SensorType::GYROSCOPE, device::mojom::SensorType::GYROSCOPE);
+CHECK_ENUM(device::SensorType::PRESSURE, device::mojom::SensorType::PRESSURE);
+CHECK_ENUM(device::SensorType::LAST, device::mojom::SensorType::LAST);
+
+// static
+device::mojom::SensorType
+EnumTraits<device::mojom::SensorType, device::SensorType>::ToMojom(
+    device::SensorType sensor_type) {
+  switch (sensor_type) {
+    case device::SensorType::AMBIENT_LIGHT:
+      return device::mojom::SensorType::AMBIENT_LIGHT;
+    case device::SensorType::PROXIMITY:
+      return device::mojom::SensorType::PROXIMITY;
+    case device::SensorType::ACCELEROMETER:
+      return device::mojom::SensorType::ACCELEROMETER;
+    case device::SensorType::GYROSCOPE:
+      return device::mojom::SensorType::GYROSCOPE;
+    case device::SensorType::PRESSURE:
+      return device::mojom::SensorType::PRESSURE;
+  }
+
+  NOTREACHED();
+  return device::mojom::SensorType::AMBIENT_LIGHT;
+}
+
+// static
+bool EnumTraits<device::mojom::SensorType, device::SensorType>::FromMojom(
+    device::mojom::SensorType input,
+    device::SensorType* out) {
+  switch (input) {
+    case device::mojom::SensorType::AMBIENT_LIGHT:
+      *out = device::SensorType::AMBIENT_LIGHT;
+      return true;
+    case device::mojom::SensorType::PROXIMITY:
+      *out = device::SensorType::PROXIMITY;
+      return true;
+    case device::mojom::SensorType::ACCELEROMETER:
+      *out = device::SensorType::ACCELEROMETER;
+      return true;
+    case device::mojom::SensorType::GYROSCOPE:
+      *out = device::SensorType::GYROSCOPE;
+      return true;
+    case device::mojom::SensorType::PRESSURE:
+      *out = device::SensorType::PRESSURE;
+      return true;
+  }
+
+  NOTREACHED();
+  return false;
+}
+
+}  // namespace mojo