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