gecko-dev/dom/presentation/PresentationAvailability.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_PresentationAvailability_h
#define mozilla_dom_PresentationAvailability_h

#include "mozilla/DOMEventTargetHelper.h"
#include "nsIPresentationListener.h"
#include "nsTArray.h"

namespace mozilla {
namespace dom {

class Promise;

class PresentationAvailability final : public DOMEventTargetHelper
                                     , public nsIPresentationAvailabilityListener
                                     , public SupportsWeakPtr<PresentationAvailability>
{
public:
  NS_DECL_ISUPPORTS_INHERITED
  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(PresentationAvailability,
                                           DOMEventTargetHelper)
  NS_DECL_NSIPRESENTATIONAVAILABILITYLISTENER
  MOZ_DECLARE_WEAKREFERENCE_TYPENAME(PresentationAvailability)

  static already_AddRefed<PresentationAvailability>
  Create(nsPIDOMWindowInner* aWindow,
         const nsAString& aUrl,
         RefPtr<Promise>& aPromise);

  virtual void DisconnectFromOwner() override;

  virtual JSObject* WrapObject(JSContext* aCx,
                               JS::Handle<JSObject*> aGivenProto) override;

  bool Equals(const uint64_t aWindowID, const nsAString& aUrl) const;

  bool IsCachedValueReady();

  void EnqueuePromise(RefPtr<Promise>& aPromise);

  // WebIDL (public APIs)
  bool Value() const;

  IMPL_EVENT_HANDLER(change);

private:
  explicit PresentationAvailability(nsPIDOMWindowInner* aWindow,
                                    const nsAString& aUrl);

  virtual ~PresentationAvailability();

  bool Init(RefPtr<Promise>& aPromise);

  void Shutdown();

  void UpdateAvailabilityAndDispatchEvent(bool aIsAvailable);

  bool mIsAvailable;

  nsTArray<RefPtr<Promise>> mPromises;

  nsString mUrl;
};

} // namespace dom
} // namespace mozilla

#endif // mozilla_dom_PresentationAvailability_h