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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "config.h"
      6 #include "modules/device_orientation/DeviceMotionController.h"
      7 
      8 #include "core/dom/Document.h"
      9 #include "modules/EventModules.h"
     10 #include "modules/device_orientation/DeviceMotionData.h"
     11 #include "modules/device_orientation/DeviceMotionDispatcher.h"
     12 #include "modules/device_orientation/DeviceMotionEvent.h"
     13 
     14 namespace WebCore {
     15 
     16 DeviceMotionController::DeviceMotionController(Document& document)
     17     : DeviceSingleWindowEventController(document)
     18 {
     19 }
     20 
     21 DeviceMotionController::~DeviceMotionController()
     22 {
     23     stopUpdating();
     24 }
     25 
     26 const char* DeviceMotionController::supplementName()
     27 {
     28     return "DeviceMotionController";
     29 }
     30 
     31 DeviceMotionController& DeviceMotionController::from(Document& document)
     32 {
     33     DeviceMotionController* controller = static_cast<DeviceMotionController*>(DocumentSupplement::from(document, supplementName()));
     34     if (!controller) {
     35         controller = new DeviceMotionController(document);
     36         DocumentSupplement::provideTo(document, supplementName(), adoptPtrWillBeNoop(controller));
     37     }
     38     return *controller;
     39 }
     40 
     41 bool DeviceMotionController::hasLastData()
     42 {
     43     return DeviceMotionDispatcher::instance().latestDeviceMotionData();
     44 }
     45 
     46 void DeviceMotionController::registerWithDispatcher()
     47 {
     48     DeviceMotionDispatcher::instance().addController(this);
     49 }
     50 
     51 void DeviceMotionController::unregisterWithDispatcher()
     52 {
     53     DeviceMotionDispatcher::instance().removeController(this);
     54 }
     55 
     56 PassRefPtrWillBeRawPtr<Event> DeviceMotionController::lastEvent() const
     57 {
     58     return DeviceMotionEvent::create(EventTypeNames::devicemotion, DeviceMotionDispatcher::instance().latestDeviceMotionData());
     59 }
     60 
     61 bool DeviceMotionController::isNullEvent(Event* event) const
     62 {
     63     DeviceMotionEvent* motionEvent = toDeviceMotionEvent(event);
     64     return !motionEvent->deviceMotionData()->canProvideEventData();
     65 }
     66 
     67 const AtomicString& DeviceMotionController::eventTypeName() const
     68 {
     69     return EventTypeNames::devicemotion;
     70 }
     71 
     72 } // namespace WebCore
     73