diff -r 000000000000 -r 6474c204b198 dom/system/nsDeviceSensors.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/system/nsDeviceSensors.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,82 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef nsDeviceSensors_h
+#define nsDeviceSensors_h
+
+#include "nsIDeviceSensors.h"
+#include "nsCOMArray.h"
+#include "nsTArray.h"
+#include "nsCOMPtr.h"
+#include "nsITimer.h"
+#include "nsIDOMDeviceOrientationEvent.h"
+#include "mozilla/dom/DeviceMotionEvent.h"
+#include "mozilla/TimeStamp.h"
+#include "mozilla/HalSensor.h"
+#include "nsDataHashtable.h"
+
+class nsIDOMWindow;
+
+namespace mozilla {
+namespace dom {
+class EventTarget;
+}
+}
+
+class nsDeviceSensors : public nsIDeviceSensors, public mozilla::hal::ISensorObserver
+{
+  typedef mozilla::dom::DeviceAccelerationInit DeviceAccelerationInit;
+  typedef mozilla::dom::DeviceRotationRateInit DeviceRotationRateInit;
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIDEVICESENSORS
+
+  nsDeviceSensors();
+
+  virtual ~nsDeviceSensors();
+
+  void Notify(const mozilla::hal::SensorData& aSensorData);
+
+private:
+  // sensor -> window listener
+  nsTArray<nsTArray<nsIDOMWindow*>* > mWindowListeners;
+
+  void FireDOMLightEvent(mozilla::dom::EventTarget* aTarget,
+                         double value);
+
+  void FireDOMProximityEvent(mozilla::dom::EventTarget* aTarget,
+                             double aValue,
+                             double aMin,
+                             double aMax);
+
+  void FireDOMUserProximityEvent(mozilla::dom::EventTarget* aTarget,
+                                 bool aNear);
+
+  void FireDOMOrientationEvent(class nsIDOMDocument *domDoc,
+                               mozilla::dom::EventTarget* target,
+                               double alpha,
+                               double beta,
+                               double gamma);
+
+  void FireDOMMotionEvent(class nsIDOMDocument *domDoc,
+                          mozilla::dom::EventTarget* target,
+                          uint32_t type,
+                          double x,
+                          double y,
+                          double z);
+
+  bool mEnabled;
+
+  inline bool IsSensorEnabled(uint32_t aType) {
+    return mWindowListeners[aType]->Length() > 0;
+  }
+
+  mozilla::TimeStamp mLastDOMMotionEventTime;
+  bool mIsUserProximityNear;
+  mozilla::Maybe<DeviceAccelerationInit> mLastAcceleration;
+  mozilla::Maybe<DeviceAccelerationInit> mLastAccelerationIncluduingGravity;
+  mozilla::Maybe<DeviceRotationRateInit> mLastRotationRate;
+};
+
+#endif