gecko-dev/dom/presentation/Presentation.cpp

100 строки
2.7 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/dom/PresentationBinding.h"
#include "mozilla/dom/Promise.h"
#include "nsCycleCollectionParticipant.h"
#include "nsIPresentationService.h"
#include "nsServiceManagerUtils.h"
#include "Presentation.h"
#include "PresentationReceiver.h"
using namespace mozilla;
using namespace mozilla::dom;
NS_IMPL_CYCLE_COLLECTION_INHERITED(Presentation, DOMEventTargetHelper,
mDefaultRequest, mReceiver)
NS_IMPL_ADDREF_INHERITED(Presentation, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(Presentation, DOMEventTargetHelper)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(Presentation)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
/* static */ already_AddRefed<Presentation>
Presentation::Create(nsPIDOMWindowInner* aWindow)
{
RefPtr<Presentation> presentation = new Presentation(aWindow);
return NS_WARN_IF(!presentation->Init()) ? nullptr : presentation.forget();
}
Presentation::Presentation(nsPIDOMWindowInner* aWindow)
: DOMEventTargetHelper(aWindow)
{
}
Presentation::~Presentation()
{
}
bool
Presentation::Init()
{
nsCOMPtr<nsIPresentationService> service =
do_GetService(PRESENTATION_SERVICE_CONTRACTID);
if (NS_WARN_IF(!service)) {
return false;
}
if (NS_WARN_IF(!GetOwner())) {
return false;
}
// Check if a receiver instance is required now. A session may already be
// connecting before the web content gets loaded in a receiving browsing
// context.
nsAutoString sessionId;
nsresult rv = service->GetExistentSessionIdAtLaunch(GetOwner()->WindowID(), sessionId);
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
if (!sessionId.IsEmpty()) {
mReceiver = PresentationReceiver::Create(GetOwner(), sessionId);
if (NS_WARN_IF(!mReceiver)) {
return false;
}
}
return true;
}
/* virtual */ JSObject*
Presentation::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto)
{
return PresentationBinding::Wrap(aCx, this, aGivenProto);
}
void
Presentation::SetDefaultRequest(PresentationRequest* aRequest)
{
mDefaultRequest = aRequest;
}
already_AddRefed<PresentationRequest>
Presentation::GetDefaultRequest() const
{
RefPtr<PresentationRequest> request = mDefaultRequest;
return request.forget();
}
already_AddRefed<PresentationReceiver>
Presentation::GetReceiver() const
{
RefPtr<PresentationReceiver> receiver = mReceiver;
return receiver.forget();
}