123 lines
3.6 KiB
C++
123 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/PresentationAvailabilityBinding.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsIPresentationDeviceManager.h"
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#include "nsIPresentationService.h"
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#include "nsServiceManagerUtils.h"
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#include "PresentationAvailability.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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NS_IMPL_CYCLE_COLLECTION_CLASS(PresentationAvailability)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(PresentationAvailability, DOMEventTargetHelper)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(PresentationAvailability, DOMEventTargetHelper)
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tmp->Shutdown();
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_ADDREF_INHERITED(PresentationAvailability, DOMEventTargetHelper)
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NS_IMPL_RELEASE_INHERITED(PresentationAvailability, DOMEventTargetHelper)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(PresentationAvailability)
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NS_INTERFACE_MAP_ENTRY(nsIPresentationAvailabilityListener)
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NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
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/* static */ already_AddRefed<PresentationAvailability>
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PresentationAvailability::Create(nsPIDOMWindow* aWindow)
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{
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RefPtr<PresentationAvailability> availability = new PresentationAvailability(aWindow);
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return NS_WARN_IF(!availability->Init()) ? nullptr : availability.forget();
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}
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PresentationAvailability::PresentationAvailability(nsPIDOMWindow* aWindow)
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: DOMEventTargetHelper(aWindow)
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, mIsAvailable(false)
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{
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}
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PresentationAvailability::~PresentationAvailability()
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{
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Shutdown();
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}
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bool
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PresentationAvailability::Init()
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{
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nsCOMPtr<nsIPresentationService> service =
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do_GetService(PRESENTATION_SERVICE_CONTRACTID);
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if (NS_WARN_IF(!service)) {
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return false;
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}
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nsresult rv = service->RegisterAvailabilityListener(this);
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if (NS_WARN_IF(NS_FAILED(rv))) {
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return false;
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}
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nsCOMPtr<nsIPresentationDeviceManager> deviceManager =
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do_GetService(PRESENTATION_DEVICE_MANAGER_CONTRACTID);
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if (NS_WARN_IF(!deviceManager)) {
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return false;
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}
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deviceManager->GetDeviceAvailable(&mIsAvailable);
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return true;
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}
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void PresentationAvailability::Shutdown()
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{
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nsCOMPtr<nsIPresentationService> service =
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do_GetService(PRESENTATION_SERVICE_CONTRACTID);
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if (NS_WARN_IF(!service)) {
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return;
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}
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nsresult rv = service->UnregisterAvailabilityListener(this);
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NS_WARN_IF(NS_FAILED(rv));
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}
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/* virtual */ void
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PresentationAvailability::DisconnectFromOwner()
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{
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Shutdown();
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DOMEventTargetHelper::DisconnectFromOwner();
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}
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/* virtual */ JSObject*
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PresentationAvailability::WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto)
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{
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return PresentationAvailabilityBinding::Wrap(aCx, this, aGivenProto);
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}
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bool
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PresentationAvailability::Value() const
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{
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return mIsAvailable;
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}
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NS_IMETHODIMP
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PresentationAvailability::NotifyAvailableChange(bool aIsAvailable)
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{
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nsCOMPtr<nsIRunnable> runnable =
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NS_NewRunnableMethodWithArg<bool>(this,
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&PresentationAvailability::UpdateAvailabilityAndDispatchEvent,
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aIsAvailable);
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return NS_DispatchToCurrentThread(runnable);
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}
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void
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PresentationAvailability::UpdateAvailabilityAndDispatchEvent(bool aIsAvailable) {
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mIsAvailable = aIsAvailable;
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NS_WARN_IF(NS_FAILED(DispatchTrustedEvent(NS_LITERAL_STRING("change"))));
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}
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