src/third_party/WebKit/Source/modules/battery/NavigatorBattery.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/battery/NavigatorBattery.h"
   7
   8 #include "core/frame/LocalFrame.h"
   9 #include "modules/battery/BatteryManager.h"
  10
  11 namespace blink {
  12
  13 NavigatorBattery::NavigatorBattery()
  14 {
  15 }
  16
  17 NavigatorBattery::~NavigatorBattery()
  18 {
  19 }
  20
  21 ScriptPromise NavigatorBattery::getBattery(ScriptState* scriptState, Navigator& navigator)
  22 {
  23     return NavigatorBattery::from(navigator).getBattery(scriptState);
  24 }
  25
  26 ScriptPromise NavigatorBattery::getBattery(ScriptState* scriptState)
  27 {
  28     if (!m_batteryManager)
  29         m_batteryManager = BatteryManager::create(scriptState->executionContext());
  30
  31     return m_batteryManager->startRequest(scriptState);
  32 }
  33
  34 const char* NavigatorBattery::supplementName()
  35 {
  36     return "NavigatorBattery";
  37 }
  38
  39 NavigatorBattery& NavigatorBattery::from(Navigator& navigator)
  40 {
  41     NavigatorBattery* supplement = static_cast<NavigatorBattery*>(WillBeHeapSupplement<Navigator>::from(navigator, supplementName()));
  42     if (!supplement) {
  43         supplement = new NavigatorBattery();
  44         provideTo(navigator, supplementName(), adoptPtrWillBeNoop(supplement));
  45     }
  46     return *supplement;
  47 }
  48
  49 void NavigatorBattery::trace(Visitor* visitor)
  50 {
  51     visitor->trace(m_batteryManager);
  52     WillBeHeapSupplement<Navigator>::trace(visitor);
  53 }
  54
  55 } // namespace blink