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1a4ed0c6e5
MozReview-Commit-ID: 8DjlW3C58Tz --HG-- extra : rebase_source : 076e26f256faed64f44c035d2a1b8e317052af63
139 lines
4.0 KiB
C++
139 lines
4.0 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 "PresentationAvailability.h"
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#include "mozilla/dom/PresentationAvailabilityBinding.h"
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#include "mozilla/dom/Promise.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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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(mPromise)
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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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NS_IMPL_CYCLE_COLLECTION_UNLINK(mPromise);
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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(nsPIDOMWindowInner* aWindow,
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RefPtr<Promise>& aPromise)
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{
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RefPtr<PresentationAvailability> availability =
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new PresentationAvailability(aWindow);
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return NS_WARN_IF(!availability->Init(aPromise)) ? nullptr
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: availability.forget();
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}
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PresentationAvailability::PresentationAvailability(nsPIDOMWindowInner* 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(RefPtr<Promise>& aPromise)
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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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// If the user agent is unable to monitor available device,
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// Resolve promise with |value| set to false.
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mIsAvailable = false;
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aPromise->MaybeResolve(this);
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return true;
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}
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mPromise = aPromise;
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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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return NS_DispatchToCurrentThread(NewRunnableMethod
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<bool>(this,
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&PresentationAvailability::UpdateAvailabilityAndDispatchEvent,
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aIsAvailable));
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}
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void
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PresentationAvailability::UpdateAvailabilityAndDispatchEvent(bool aIsAvailable)
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{
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bool isChanged = (aIsAvailable != mIsAvailable);
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mIsAvailable = aIsAvailable;
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if (mPromise) {
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mPromise->MaybeResolve(this);
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mPromise = nullptr;
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return;
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}
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if (isChanged) {
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NS_WARN_IF(NS_FAILED(DispatchTrustedEvent(NS_LITERAL_STRING("change"))));
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}
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}
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