WebKit & WebCore part of the device motion implementation using the platform layer.

Source/WebCore/dom/DeviceMotionController.h

 /*
- * Copyright 2010 Apple Inc. All rights reserved.
- * Copyright (C) 2012 Samsung Electronics. All rights reserved.
+ * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *  * Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- *  * Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
+ * modification, are permitted provided that the following conditions are
+ * met:
  *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

[Peter Beverloo, 2013/04/09 17:29:53]

We can't just change the copyright header if Samsung added this file.  Best to
leave it untouched.

[timvolodine, 2013/04/10 19:06:12]

Done.

 
 #ifndef DeviceMotionController_h
 #define DeviceMotionController_h
 
 #include "DeviceController.h"
 
 namespace WebCore {
 
-class DeviceMotionClient;
 class DeviceMotionData;
 
 class DeviceMotionController : public DeviceController {
 public:
-    ~DeviceMotionController() { };
+    virtual ~DeviceMotionController() { };
 
-    static PassOwnPtr<DeviceMotionController> create(DeviceMotionClient*);
+    static DeviceMotionController& shared();
 
     void didChangeDeviceMotion(DeviceMotionData*);
-    DeviceMotionClient* deviceMotionClient();
 
     virtual bool hasLastData() OVERRIDE;
     virtual PassRefPtr<Event> getLastEvent() OVERRIDE;
+    bool isActiveAt(Page* page) { return m_activePages.contains(page); }

[Peter Beverloo, 2013/04/09 17:29:53]

This class will now have both isActive() and isActiveAt(), which seems a bit
ambiguous.

[timvolodine, 2013/04/10 19:06:12]

That's how it was before as well. DeviceController implementing the isActive()
and DeviceMotionController isActiveAt(page). Maybe should rename isActiveAt to
isActiveAtPage(page) ?

 
-    static const char* supplementName();
-    static DeviceMotionController* from(Page*);
-    static bool isActiveAt(Page*);
+    virtual void startUpdating();
+    virtual void stopUpdating();

[Peter Beverloo, 2013/04/09 17:29:53]

Why are these declared as virtual? Also, do they have to be public?

[timvolodine, 2013/04/10 19:06:12]

Done.

 
-private:
-    explicit DeviceMotionController(DeviceMotionClient*);
+// -------------------------------------------------

[Peter Beverloo, 2013/04/09 17:29:53]

nit: the horizontal line without explanation is a bit odd. Remove it?

[timvolodine, 2013/04/10 19:06:12]

Done.

+
+    void addDeviceEventListener(DOMWindow*) OVERRIDE;

[Peter Beverloo, 2013/04/09 17:29:53]

Why are these declared OVERRIDE without being declared virtual?  That kind of
defeats the purpose of the base class.  Will we be able to generalize the
implementation to DeviceController again once Device Orientation also starts
using this design?

[timvolodine, 2013/04/10 19:06:12]

right, yes the idea is to generalize the design once we switch the orientation
as well.
Done.

+    void removeDeviceEventListener(DOMWindow*) OVERRIDE;
+    void removeAllDeviceEventListeners(DOMWindow*) OVERRIDE;
+
+//    void dispatchDeviceEvent(PassRefPtr<Event>);
+//    bool isActive() { return !m_listeners.isEmpty(); }
+//    DeviceClient* client() { return m_client; }

[Peter Beverloo, 2013/04/09 17:29:53]

No commented-out code please.

[timvolodine, 2013/04/10 19:06:12]

Done.

+
+protected:
+    DeviceMotionController();
+    HashCountedSet<Page*> m_activePages;

[Peter Beverloo, 2013/04/09 17:29:53]

nit: could you add an empty line between the constructor and the member
variable?

[timvolodine, 2013/04/10 19:06:12]

Done.

 };
 
 } // namespace WebCore
 
 #endif // DeviceMotionController_h