Index: third_party/WebKit/Source/modules/sensor/SensorUpdateNotifier.h |
diff --git a/third_party/WebKit/Source/modules/sensor/SensorUpdateNotifier.h b/third_party/WebKit/Source/modules/sensor/SensorUpdateNotifier.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..6b5169bd951c04adfd2a464808808e4ae4e29c88 |
--- /dev/null |
+++ b/third_party/WebKit/Source/modules/sensor/SensorUpdateNotifier.h |
@@ -0,0 +1,39 @@ |
+// 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 SensorUpdateNotifier_h |
+#define SensorUpdateNotifier_h |
+ |
+#include "device/generic_sensor/public/interfaces/sensor_provider.mojom-blink.h" |
+#include "wtf/Functional.h" |
+ |
+namespace blink { |
+ |
+// This class encapsulates sensor reading update notification logic: |
+// the callback is invoked after client calls 'onSensorReadingChanged()' |
+// however considering the given sample frequency. |
+class SensorUpdateNotifier { |
+ public: |
+ static std::unique_ptr<SensorUpdateNotifier> create( |
+ double frequency, |
+ std::unique_ptr<Function<void()>>, |
+ device::mojom::blink::ReportingMode); |
+ |
+ // Please see SensorProxy::Observer comments explaining |
+ // the |timestamp| argument. |
+ virtual void onSensorReadingChanged(double timestamp) = 0; |
+ virtual void cancelPendingNotifications() = 0; |
+ virtual ~SensorUpdateNotifier() {} |
+ |
+ protected: |
+ SensorUpdateNotifier(double period, std::unique_ptr<Function<void()>>); |
+ |
+ double m_period; |
+ std::unique_ptr<Function<void()>> m_func; |
+ double m_lastTimestamp; |
+}; |
+ |
+} // namespace blink |
+ |
+#endif // SensorUpdateNotifier_h |