src/third_party/WebKit/Source/modules/device_light/DeviceLightController.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_light/DeviceLightController.h"
   7
   8 #include "core/dom/Document.h"
   9 #include "modules/EventModules.h"
  10 #include "modules/device_light/DeviceLightDispatcher.h"
  11 #include "modules/device_light/DeviceLightEvent.h"
  12 #include "platform/RuntimeEnabledFeatures.h"
  13
  14 namespace blink {
  15
  16 DeviceLightController::DeviceLightController(Document& document)
  17     : DeviceSingleWindowEventController(document)
  18 {
  19 }
  20
  21 DeviceLightController::~DeviceLightController()
  22 {
  23 #if !ENABLE(OILPAN)
  24     stopUpdating();
  25 #endif
  26 }
  27
  28 const char* DeviceLightController::supplementName()
  29 {
  30     return "DeviceLightController";
  31 }
  32
  33 DeviceLightController& DeviceLightController::from(Document& document)
  34 {
  35     DeviceLightController* controller = static_cast<DeviceLightController*>(DocumentSupplement::from(document, supplementName()));
  36     if (!controller) {
  37         controller = new DeviceLightController(document);
  38         DocumentSupplement::provideTo(document, supplementName(), adoptPtrWillBeNoop(controller));
  39     }
  40     return *controller;
  41 }
  42
  43 bool DeviceLightController::hasLastData()
  44 {
  45     return DeviceLightDispatcher::instance().latestDeviceLightData() >= 0;
  46 }
  47
  48 void DeviceLightController::registerWithDispatcher()
  49 {
  50     DeviceLightDispatcher::instance().addController(this);
  51 }
  52
  53 void DeviceLightController::unregisterWithDispatcher()
  54 {
  55     DeviceLightDispatcher::instance().removeController(this);
  56 }
  57
  58 PassRefPtrWillBeRawPtr<Event> DeviceLightController::lastEvent() const
  59 {
  60     return DeviceLightEvent::create(EventTypeNames::devicelight,
  61         DeviceLightDispatcher::instance().latestDeviceLightData());
  62 }
  63
  64 bool DeviceLightController::isNullEvent(Event* event) const
  65 {
  66     DeviceLightEvent* lightEvent = toDeviceLightEvent(event);
  67     return lightEvent->value() == std::numeric_limits<double>::infinity();
  68 }
  69
  70 const AtomicString& DeviceLightController::eventTypeName() const
  71 {
  72     return EventTypeNames::devicelight;
  73 }
  74
  75 void DeviceLightController::trace(Visitor* visitor)
  76 {
  77     DeviceSingleWindowEventController::trace(visitor);
  78     DocumentSupplement::trace(visitor);
  79 }
  80
  81
  82 } // namespace blink