src/third_party/WebKit/Source/modules/battery/BatteryManager.h

   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 #ifndef BatteryManager_h
   6 #define BatteryManager_h
   7
   8 #include "bindings/core/v8/ScriptPromise.h"
   9 #include "bindings/core/v8/ScriptPromiseResolver.h"
  10 #include "core/dom/ContextLifecycleObserver.h"
  11 #include "core/frame/PlatformEventController.h"
  12 #include "modules/EventTargetModules.h"
  13 #include "platform/heap/Handle.h"
  14
  15 namespace blink {
  16
  17 class BatteryStatus;
  18
  19 class BatteryManager final : public RefCountedGarbageCollectedWillBeGarbageCollectedFinalized<BatteryManager>, public ActiveDOMObject, public PlatformEventController, public EventTargetWithInlineData {
  20     DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<BatteryManager>);
  21     DEFINE_WRAPPERTYPEINFO();
  22     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(BatteryManager);
  23 public:
  24     static BatteryManager* create(ExecutionContext*);
  25     virtual ~BatteryManager();
  26
  27     // Returns a promise object that will be resolved with this BatteryManager.
  28     ScriptPromise startRequest(ScriptState*);
  29
  30     // EventTarget implementation.
  31     virtual const WTF::AtomicString& interfaceName() const override { return EventTargetNames::BatteryManager; }
  32     virtual ExecutionContext* executionContext() const override { return ContextLifecycleObserver::executionContext(); }
  33
  34     bool charging();
  35     double chargingTime();
  36     double dischargingTime();
  37     double level();
  38
  39     DEFINE_ATTRIBUTE_EVENT_LISTENER(chargingchange);
  40     DEFINE_ATTRIBUTE_EVENT_LISTENER(chargingtimechange);
  41     DEFINE_ATTRIBUTE_EVENT_LISTENER(dischargingtimechange);
  42     DEFINE_ATTRIBUTE_EVENT_LISTENER(levelchange);
  43
  44     // Inherited from PlatformEventController.
  45     virtual void didUpdateData() override;
  46     virtual void registerWithDispatcher() override;
  47     virtual void unregisterWithDispatcher() override;
  48     virtual bool hasLastData() override;
  49
  50     // ActiveDOMObject implementation.
  51     virtual bool canSuspend() const { return true; }
  52     virtual void suspend() override;
  53     virtual void resume() override;
  54     virtual void stop() override;
  55     virtual bool hasPendingActivity() const override;
  56
  57     virtual void trace(Visitor*) override;
  58
  59 private:
  60     enum State {
  61         NotStarted,
  62         Pending,
  63         Resolved,
  64     };
  65
  66     explicit BatteryManager(ExecutionContext*);
  67
  68     RefPtr<ScriptPromiseResolver> m_resolver;
  69     Member<BatteryStatus> m_batteryStatus;
  70     State m_state;
  71 };
  72
  73 } // namespace blink
  74
  75 #endif // BatteryManager_h