src/third_party/WebKit/Source/modules/device_orientation/DeviceMotionController.cpp

   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 blink {
  15
  16 DeviceMotionController::DeviceMotionController(Document& document)
  17     : DeviceSingleWindowEventController(document)
  18 {
  19 }
  20
  21 DeviceMotionController::~DeviceMotionController()
  22 {
  23 #if !ENABLE(OILPAN)
  24     stopUpdating();
  25 #endif
  26 }
  27
  28 const char* DeviceMotionController::supplementName()
  29 {
  30     return "DeviceMotionController";
  31 }
  32
  33 DeviceMotionController& DeviceMotionController::from(Document& document)
  34 {
  35     DeviceMotionController* controller = static_cast<DeviceMotionController*>(DocumentSupplement::from(document, supplementName()));
  36     if (!controller) {
  37         controller = new DeviceMotionController(document);
  38         DocumentSupplement::provideTo(document, supplementName(), adoptPtrWillBeNoop(controller));
  39     }
  40     return *controller;
  41 }
  42
  43 bool DeviceMotionController::hasLastData()
  44 {
  45     return DeviceMotionDispatcher::instance().latestDeviceMotionData();
  46 }
  47
  48 void DeviceMotionController::registerWithDispatcher()
  49 {
  50     DeviceMotionDispatcher::instance().addController(this);
  51 }
  52
  53 void DeviceMotionController::unregisterWithDispatcher()
  54 {
  55     DeviceMotionDispatcher::instance().removeController(this);
  56 }
  57
  58 PassRefPtrWillBeRawPtr<Event> DeviceMotionController::lastEvent() const
  59 {
  60     return DeviceMotionEvent::create(EventTypeNames::devicemotion, DeviceMotionDispatcher::instance().latestDeviceMotionData());
  61 }
  62
  63 bool DeviceMotionController::isNullEvent(Event* event) const
  64 {
  65     DeviceMotionEvent* motionEvent = toDeviceMotionEvent(event);
  66     return !motionEvent->deviceMotionData()->canProvideEventData();
  67 }
  68
  69 const AtomicString& DeviceMotionController::eventTypeName() const
  70 {
  71     return EventTypeNames::devicemotion;
  72 }
  73
  74 void DeviceMotionController::trace(Visitor* visitor)
  75 {
  76     DeviceSingleWindowEventController::trace(visitor);
  77     DocumentSupplement::trace(visitor);
  78 }
  79
  80 } // namespace blink