Index: third_party/WebKit/Source/modules/sensor/SensorUpdateNotificationStrategy.h |
diff --git a/third_party/WebKit/Source/modules/sensor/SensorUpdateNotificationStrategy.h b/third_party/WebKit/Source/modules/sensor/SensorUpdateNotificationStrategy.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..720e9a124e2d6b2ada6b0e99d0137c5b6dd134e3 |
--- /dev/null |
+++ b/third_party/WebKit/Source/modules/sensor/SensorUpdateNotificationStrategy.h |
@@ -0,0 +1,29 @@ |
+// 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 SensorUpdateNotificationStrategy_h |
+#define SensorUpdateNotificationStrategy_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: |
+// guaranteed not to be called more often than expected. |
+class SensorUpdateNotificationStrategy { |
+ public: |
+ static std::unique_ptr<SensorUpdateNotificationStrategy> create( |
+ double frequency, |
+ std::unique_ptr<Function<void()>>); |
+ |
+ virtual void onSensorReadingChanged() = 0; |
+ virtual void cancelPendingNotifications() = 0; |
+ virtual ~SensorUpdateNotificationStrategy() {} |
+}; |
+ |
+} // namespace blink |
+ |
+#endif // SensorUpdateNotificationStrategy_h |