gecko-dev/dom/presentation/PresentationRequest.cpp

179 строки
5.2 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/PresentationRequestBinding.h"
#include "mozilla/dom/PresentationConnectionAvailableEvent.h"
#include "mozilla/dom/Promise.h"
#include "mozIThirdPartyUtil.h"
#include "nsCycleCollectionParticipant.h"
#include "nsIPresentationService.h"
#include "nsIUUIDGenerator.h"
#include "nsServiceManagerUtils.h"
#include "PresentationAvailability.h"
#include "PresentationCallbacks.h"
#include "PresentationRequest.h"
using namespace mozilla;
using namespace mozilla::dom;
NS_IMPL_CYCLE_COLLECTION_INHERITED(PresentationRequest, DOMEventTargetHelper,
mAvailability)
NS_IMPL_ADDREF_INHERITED(PresentationRequest, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(PresentationRequest, DOMEventTargetHelper)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(PresentationRequest)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
/* static */ already_AddRefed<PresentationRequest>
PresentationRequest::Constructor(const GlobalObject& aGlobal,
const nsAString& aUrl,
ErrorResult& aRv)
{
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(aGlobal.GetAsSupports());
if (!window) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
// Ensure the URL is not empty.
if (NS_WARN_IF(aUrl.IsEmpty())) {
aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
return nullptr;
}
RefPtr<PresentationRequest> request = new PresentationRequest(window, aUrl);
return NS_WARN_IF(!request->Init()) ? nullptr : request.forget();
}
PresentationRequest::PresentationRequest(nsPIDOMWindowInner* aWindow,
const nsAString& aUrl)
: DOMEventTargetHelper(aWindow)
, mUrl(aUrl)
{
}
PresentationRequest::~PresentationRequest()
{
}
bool
PresentationRequest::Init()
{
mAvailability = PresentationAvailability::Create(GetOwner());
if (NS_WARN_IF(!mAvailability)) {
return false;
}
return true;
}
/* virtual */ JSObject*
PresentationRequest::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto)
{
return PresentationRequestBinding::Wrap(aCx, this, aGivenProto);
}
already_AddRefed<Promise>
PresentationRequest::Start(ErrorResult& aRv)
{
return StartWithDevice(NullString(), aRv);
}
already_AddRefed<Promise>
PresentationRequest::StartWithDevice(const nsAString& aDeviceId,
ErrorResult& aRv)
{
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(GetOwner());
if (NS_WARN_IF(!global)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
// Get the origin.
nsAutoString origin;
nsresult rv = nsContentUtils::GetUTFOrigin(global->PrincipalOrNull(), origin);
if (NS_WARN_IF(NS_FAILED(rv))) {
aRv.Throw(rv);
return nullptr;
}
RefPtr<Promise> promise = Promise::Create(global, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
// Generate a session ID.
nsCOMPtr<nsIUUIDGenerator> uuidgen =
do_GetService("@mozilla.org/uuid-generator;1");
if(NS_WARN_IF(!uuidgen)) {
promise->MaybeReject(NS_ERROR_DOM_OPERATION_ERR);
return promise.forget();
}
nsID uuid;
uuidgen->GenerateUUIDInPlace(&uuid);
char buffer[NSID_LENGTH];
uuid.ToProvidedString(buffer);
nsAutoString id;
CopyASCIItoUTF16(buffer, id);
nsCOMPtr<nsIPresentationService> service =
do_GetService(PRESENTATION_SERVICE_CONTRACTID);
if(NS_WARN_IF(!service)) {
promise->MaybeReject(NS_ERROR_DOM_OPERATION_ERR);
return promise.forget();
}
nsCOMPtr<nsIPresentationServiceCallback> callback =
new PresentationRequesterCallback(this, mUrl, id, promise);
rv = service->StartSession(mUrl, id, origin, aDeviceId, callback);
if (NS_WARN_IF(NS_FAILED(rv))) {
promise->MaybeReject(NS_ERROR_DOM_OPERATION_ERR);
}
return promise.forget();
}
already_AddRefed<Promise>
PresentationRequest::GetAvailability(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;
}
promise->MaybeResolve(mAvailability);
return promise.forget();
}
nsresult
PresentationRequest::DispatchConnectionAvailableEvent(PresentationConnection* aConnection)
{
PresentationConnectionAvailableEventInit init;
init.mConnection = aConnection;
RefPtr<PresentationConnectionAvailableEvent> event =
PresentationConnectionAvailableEvent::Constructor(this,
NS_LITERAL_STRING("connectionavailable"),
init);
if (NS_WARN_IF(!event)) {
return NS_ERROR_FAILURE;
}
event->SetTrusted(true);
RefPtr<AsyncEventDispatcher> asyncDispatcher =
new AsyncEventDispatcher(this, event);
return asyncDispatcher->PostDOMEvent();
}