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/* -*- 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/. */
#include "PresentationAvailability.h"
#include "mozilla/dom/PresentationAvailabilityBinding.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/Unused.h"
#include "nsCycleCollectionParticipant.h"
#include "nsIPresentationDeviceManager.h"
#include "nsIPresentationService.h"
#include "nsServiceManagerUtils.h"
#include "PresentationLog.h"
using namespace mozilla;
using namespace mozilla::dom;
NS_IMPL_CYCLE_COLLECTION_CLASS(PresentationAvailability)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(PresentationAvailability, DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPromises)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(PresentationAvailability, DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPromises);
tmp->Shutdown();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_ADDREF_INHERITED(PresentationAvailability, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(PresentationAvailability, DOMEventTargetHelper)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(PresentationAvailability)
NS_INTERFACE_MAP_ENTRY(nsIPresentationAvailabilityListener)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
/* static */ already_AddRefed<PresentationAvailability>
PresentationAvailability::Create(nsPIDOMWindowInner* aWindow,
const nsTArray<nsString>& aUrls,
RefPtr<Promise>& aPromise)
{
RefPtr<PresentationAvailability> availability =
new PresentationAvailability(aWindow, aUrls);
return NS_WARN_IF(!availability->Init(aPromise)) ? nullptr
: availability.forget();
}
PresentationAvailability::PresentationAvailability(nsPIDOMWindowInner* aWindow,
const nsTArray<nsString>& aUrls)
: DOMEventTargetHelper(aWindow)
, mIsAvailable(false)
, mUrls(aUrls)
{
for (uint32_t i = 0; i < mUrls.Length(); ++i) {
mAvailabilityOfUrl.AppendElement(false);
}
}
PresentationAvailability::~PresentationAvailability()
{
Shutdown();
}
bool
PresentationAvailability::Init(RefPtr<Promise>& aPromise)
{
nsCOMPtr<nsIPresentationService> service =
do_GetService(PRESENTATION_SERVICE_CONTRACTID);
if (NS_WARN_IF(!service)) {
return false;
}
nsresult rv = service->RegisterAvailabilityListener(mUrls, this);
if (NS_WARN_IF(NS_FAILED(rv))) {
// If the user agent is unable to monitor available device,
// Resolve promise with |value| set to false.
mIsAvailable = false;
aPromise->MaybeResolve(this);
return true;
}
EnqueuePromise(aPromise);
AvailabilityCollection* collection = AvailabilityCollection::GetSingleton();
if (collection) {
collection->Add(this);
}
return true;
}
void PresentationAvailability::Shutdown()
{
AvailabilityCollection* collection = AvailabilityCollection::GetSingleton();
if (collection ) {
collection->Remove(this);
}
nsCOMPtr<nsIPresentationService> service =
do_GetService(PRESENTATION_SERVICE_CONTRACTID);
if (NS_WARN_IF(!service)) {
return;
}
Unused <<
NS_WARN_IF(NS_FAILED(service->UnregisterAvailabilityListener(mUrls,
this)));
}
/* virtual */ void
PresentationAvailability::DisconnectFromOwner()
{
Shutdown();
DOMEventTargetHelper::DisconnectFromOwner();
}
/* virtual */ JSObject*
PresentationAvailability::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto)
{
return PresentationAvailabilityBinding::Wrap(aCx, this, aGivenProto);
}
bool
PresentationAvailability::Equals(const uint64_t aWindowID,
const nsTArray<nsString>& aUrls) const
{
if (GetOwner() && GetOwner()->WindowID() == aWindowID &&
mUrls.Length() == aUrls.Length()) {
for (const auto& url : aUrls) {
if (!mUrls.Contains(url)) {
return false;
}
}
return true;
}
return false;
}
bool
PresentationAvailability::IsCachedValueReady()
{
// All pending promises will be solved when cached value is ready and
// no promise should be enqueued afterward.
return mPromises.IsEmpty();
}
void
PresentationAvailability::EnqueuePromise(RefPtr<Promise>& aPromise)
{
mPromises.AppendElement(aPromise);
}
bool
PresentationAvailability::Value() const
{
return mIsAvailable;
}
NS_IMETHODIMP
PresentationAvailability::NotifyAvailableChange(const nsTArray<nsString>& aAvailabilityUrls,
bool aIsAvailable)
{
bool available = false;
for (uint32_t i = 0; i < mUrls.Length(); ++i) {
if (aAvailabilityUrls.Contains(mUrls[i])) {
mAvailabilityOfUrl[i] = aIsAvailable;
}
available |= mAvailabilityOfUrl[i];
}
return NS_DispatchToCurrentThread(NewRunnableMethod
<bool>(this,
&PresentationAvailability::UpdateAvailabilityAndDispatchEvent,
available));
}
void
PresentationAvailability::UpdateAvailabilityAndDispatchEvent(bool aIsAvailable)
{
PRES_DEBUG("%s\n", __func__);
bool isChanged = (aIsAvailable != mIsAvailable);
mIsAvailable = aIsAvailable;
if (!mPromises.IsEmpty()) {
// Use the first availability change notification to resolve promise.
do {
nsTArray<RefPtr<Promise>> promises = Move(mPromises);
for (auto& promise : promises) {
promise->MaybeResolve(this);
}
// more promises may have been added to mPromises, at least in theory
} while (!mPromises.IsEmpty());
return;
}
if (isChanged) {
Unused <<
NS_WARN_IF(NS_FAILED(DispatchTrustedEvent(NS_LITERAL_STRING("change"))));
}
}
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