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df57f152fd
MozReview-Commit-ID: IDKEqSqm9Ug --HG-- extra : rebase_source : 2b908d9138157b198028aedffc344d102063c896
222 lines
6.2 KiB
C++
222 lines
6.2 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 "mozilla/Unused.h"
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#include "nsContentUtils.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 "PresentationLog.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(mPromises)
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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(mPromises);
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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(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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const nsTArray<nsString>& aUrls,
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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, aUrls);
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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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const nsTArray<nsString>& aUrls)
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: DOMEventTargetHelper(aWindow)
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, mIsAvailable(false)
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, mUrls(aUrls)
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{
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for (uint32_t i = 0; i < mUrls.Length(); ++i) {
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mAvailabilityOfUrl.AppendElement(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(mUrls, 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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EnqueuePromise(aPromise);
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AvailabilityCollection* collection = AvailabilityCollection::GetSingleton();
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if (collection) {
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collection->Add(this);
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}
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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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AvailabilityCollection* collection = AvailabilityCollection::GetSingleton();
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if (collection ) {
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collection->Remove(this);
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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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Unused <<
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NS_WARN_IF(NS_FAILED(service->UnregisterAvailabilityListener(mUrls,
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this)));
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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::Equals(const uint64_t aWindowID,
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const nsTArray<nsString>& aUrls) const
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{
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if (GetOwner() && GetOwner()->WindowID() == aWindowID &&
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mUrls.Length() == aUrls.Length()) {
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for (const auto& url : aUrls) {
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if (!mUrls.Contains(url)) {
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return false;
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}
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}
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return true;
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}
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return false;
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}
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bool
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PresentationAvailability::IsCachedValueReady()
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{
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// All pending promises will be solved when cached value is ready and
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// no promise should be enqueued afterward.
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return mPromises.IsEmpty();
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}
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void
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PresentationAvailability::EnqueuePromise(RefPtr<Promise>& aPromise)
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{
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mPromises.AppendElement(aPromise);
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}
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bool
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PresentationAvailability::Value() const
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{
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if (nsContentUtils::ShouldResistFingerprinting()) {
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return false;
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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(const nsTArray<nsString>& aAvailabilityUrls,
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bool aIsAvailable)
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{
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bool available = false;
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for (uint32_t i = 0; i < mUrls.Length(); ++i) {
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if (aAvailabilityUrls.Contains(mUrls[i])) {
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mAvailabilityOfUrl[i] = aIsAvailable;
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}
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available |= mAvailabilityOfUrl[i];
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}
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return NS_DispatchToCurrentThread(NewRunnableMethod<bool>(
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"dom::PresentationAvailability::UpdateAvailabilityAndDispatchEvent",
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this,
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&PresentationAvailability::UpdateAvailabilityAndDispatchEvent,
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available));
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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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PRES_DEBUG("%s\n", __func__);
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bool isChanged = (aIsAvailable != mIsAvailable);
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mIsAvailable = aIsAvailable;
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if (!mPromises.IsEmpty()) {
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// Use the first availability change notification to resolve promise.
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do {
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nsTArray<RefPtr<Promise>> promises = Move(mPromises);
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if (nsContentUtils::ShouldResistFingerprinting()) {
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continue;
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}
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for (auto& promise : promises) {
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promise->MaybeResolve(this);
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}
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// more promises may have been added to mPromises, at least in theory
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} while (!mPromises.IsEmpty());
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return;
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}
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if (nsContentUtils::ShouldResistFingerprinting()) {
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return;
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}
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if (isChanged) {
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Unused <<
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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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