gecko-dev/dom/presentation/PresentationReceiver.cpp

195 строки
5.7 KiB
C++

/* -*- 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 "mozilla/AsyncEventDispatcher.h"
#include "mozilla/dom/PresentationReceiverBinding.h"
#include "mozilla/dom/Promise.h"
#include "nsCycleCollectionParticipant.h"
#include "nsIPresentationService.h"
#include "nsServiceManagerUtils.h"
#include "PresentationReceiver.h"
#include "PresentationConnection.h"
using namespace mozilla;
using namespace mozilla::dom;
NS_IMPL_CYCLE_COLLECTION_CLASS(PresentationReceiver)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(PresentationReceiver, DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mConnections)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPendingGetConnectionPromises)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(PresentationReceiver, DOMEventTargetHelper)
tmp->Shutdown();
NS_IMPL_CYCLE_COLLECTION_UNLINK(mConnections)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mPendingGetConnectionPromises)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_ADDREF_INHERITED(PresentationReceiver, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(PresentationReceiver, DOMEventTargetHelper)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(PresentationReceiver)
NS_INTERFACE_MAP_ENTRY(nsIPresentationRespondingListener)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
/* static */ already_AddRefed<PresentationReceiver>
PresentationReceiver::Create(nsPIDOMWindowInner* aWindow,
const nsAString& aSessionId)
{
RefPtr<PresentationReceiver> receiver = new PresentationReceiver(aWindow);
return NS_WARN_IF(!receiver->Init(aSessionId)) ? nullptr : receiver.forget();
}
PresentationReceiver::PresentationReceiver(nsPIDOMWindowInner* aWindow)
: DOMEventTargetHelper(aWindow)
{
}
PresentationReceiver::~PresentationReceiver()
{
Shutdown();
}
bool
PresentationReceiver::Init(const nsAString& aSessionId)
{
if (NS_WARN_IF(!GetOwner())) {
return false;
}
mWindowId = GetOwner()->WindowID();
if (!aSessionId.IsEmpty()) {
nsresult rv = NotifySessionConnect(mWindowId, aSessionId);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
}
// Register listener for incoming sessions.
nsCOMPtr<nsIPresentationService> service =
do_GetService(PRESENTATION_SERVICE_CONTRACTID);
if (NS_WARN_IF(!service)) {
return false;
}
nsresult rv = service->RegisterRespondingListener(mWindowId, this);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
return true;
}
void PresentationReceiver::Shutdown()
{
mConnections.Clear();
mPendingGetConnectionPromises.Clear();
// Unregister listener for incoming sessions.
nsCOMPtr<nsIPresentationService> service =
do_GetService(PRESENTATION_SERVICE_CONTRACTID);
if (NS_WARN_IF(!service)) {
return;
}
nsresult rv = service->UnregisterRespondingListener(mWindowId);
NS_WARN_IF(NS_FAILED(rv));
}
/* virtual */ void
PresentationReceiver::DisconnectFromOwner()
{
Shutdown();
DOMEventTargetHelper::DisconnectFromOwner();
}
/* virtual */ JSObject*
PresentationReceiver::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto)
{
return PresentationReceiverBinding::Wrap(aCx, this, aGivenProto);
}
already_AddRefed<Promise>
PresentationReceiver::GetConnection(ErrorResult& aRv)
{
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(GetOwner());
if (NS_WARN_IF(!global)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
RefPtr<Promise> promise = Promise::Create(global, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
// If there's no existing connection, leave the promise pending until a
// connecting request arrives from the controlling browsing context (sender).
// http://w3c.github.io/presentation-api/#dom-presentation-getconnection
if (!mConnections.IsEmpty()) {
promise->MaybeResolve(mConnections[0]);
} else {
mPendingGetConnectionPromises.AppendElement(promise);
}
return promise.forget();
}
already_AddRefed<Promise>
PresentationReceiver::GetConnections(ErrorResult& aRv) const
{
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(GetOwner());
if (NS_WARN_IF(!global)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
RefPtr<Promise> promise = Promise::Create(global, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
promise->MaybeResolve(mConnections);
return promise.forget();
}
NS_IMETHODIMP
PresentationReceiver::NotifySessionConnect(uint64_t aWindowId,
const nsAString& aSessionId)
{
if (NS_WARN_IF(aWindowId != GetOwner()->WindowID())) {
return NS_ERROR_INVALID_ARG;
}
RefPtr<PresentationConnection> connection =
PresentationConnection::Create(GetOwner(), aSessionId,
PresentationConnectionState::Closed);
if (NS_WARN_IF(!connection)) {
return NS_ERROR_NOT_AVAILABLE;
}
mConnections.AppendElement(connection);
// Resolve pending |GetConnection| promises if any.
if (!mPendingGetConnectionPromises.IsEmpty()) {
for(uint32_t i = 0; i < mPendingGetConnectionPromises.Length(); i++) {
mPendingGetConnectionPromises[i]->MaybeResolve(connection);
}
mPendingGetConnectionPromises.Clear();
}
return DispatchConnectionAvailableEvent();
}
nsresult
PresentationReceiver::DispatchConnectionAvailableEvent()
{
RefPtr<AsyncEventDispatcher> asyncDispatcher =
new AsyncEventDispatcher(this, NS_LITERAL_STRING("connectionavailable"), false);
return asyncDispatcher->PostDOMEvent();
}