gecko-dev/dom/presentation/PresentationConnection.cpp

301 строка
8.1 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/MessageEvent.h"
#include "nsCycleCollectionParticipant.h"
#include "nsIPresentationService.h"
#include "nsServiceManagerUtils.h"
#include "nsStringStream.h"
#include "PresentationConnection.h"
using namespace mozilla;
using namespace mozilla::dom;
NS_IMPL_CYCLE_COLLECTION_CLASS(PresentationConnection)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(PresentationConnection, DOMEventTargetHelper)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(PresentationConnection, DOMEventTargetHelper)
tmp->Shutdown();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_ADDREF_INHERITED(PresentationConnection, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(PresentationConnection, DOMEventTargetHelper)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(PresentationConnection)
NS_INTERFACE_MAP_ENTRY(nsIPresentationSessionListener)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
PresentationConnection::PresentationConnection(nsPIDOMWindow* aWindow,
const nsAString& aId,
PresentationConnectionState aState)
: DOMEventTargetHelper(aWindow)
, mId(aId)
, mState(aState)
{
}
/* virtual */ PresentationConnection::~PresentationConnection()
{
}
/* static */ already_AddRefed<PresentationConnection>
PresentationConnection::Create(nsPIDOMWindow* aWindow,
const nsAString& aId,
PresentationConnectionState aState)
{
RefPtr<PresentationConnection> connection =
new PresentationConnection(aWindow, aId, aState);
return NS_WARN_IF(!connection->Init()) ? nullptr : connection.forget();
}
bool
PresentationConnection::Init()
{
if (NS_WARN_IF(mId.IsEmpty())) {
return false;
}
nsCOMPtr<nsIPresentationService> service =
do_GetService(PRESENTATION_SERVICE_CONTRACTID);
if(NS_WARN_IF(!service)) {
return false;
}
nsresult rv = service->RegisterSessionListener(mId, this);
if(NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
return true;
}
void
PresentationConnection::Shutdown()
{
nsCOMPtr<nsIPresentationService> service =
do_GetService(PRESENTATION_SERVICE_CONTRACTID);
if (NS_WARN_IF(!service)) {
return;
}
nsresult rv = service->UnregisterSessionListener(mId);
NS_WARN_IF(NS_FAILED(rv));
}
/* virtual */ void
PresentationConnection::DisconnectFromOwner()
{
Shutdown();
DOMEventTargetHelper::DisconnectFromOwner();
}
/* virtual */ JSObject*
PresentationConnection::WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto)
{
return PresentationConnectionBinding::Wrap(aCx, this, aGivenProto);
}
void
PresentationConnection::GetId(nsAString& aId) const
{
aId = mId;
}
PresentationConnectionState
PresentationConnection::State() const
{
return mState;
}
void
PresentationConnection::Send(const nsAString& aData,
ErrorResult& aRv)
{
// Sending is not allowed if the session is not connected.
if (NS_WARN_IF(mState != PresentationConnectionState::Connected)) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
nsresult rv;
nsCOMPtr<nsIStringInputStream> stream =
do_CreateInstance(NS_STRINGINPUTSTREAM_CONTRACTID, &rv);
if(NS_WARN_IF(NS_FAILED(rv))) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
NS_ConvertUTF16toUTF8 msgString(aData);
rv = stream->SetData(msgString.BeginReading(), msgString.Length());
if(NS_WARN_IF(NS_FAILED(rv))) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
nsCOMPtr<nsIPresentationService> service =
do_GetService(PRESENTATION_SERVICE_CONTRACTID);
if(NS_WARN_IF(!service)) {
aRv.Throw(NS_ERROR_DOM_OPERATION_ERR);
return;
}
rv = service->SendSessionMessage(mId, stream);
if(NS_WARN_IF(NS_FAILED(rv))) {
aRv.Throw(NS_ERROR_DOM_OPERATION_ERR);
}
}
void
PresentationConnection::Close(ErrorResult& aRv)
{
// It only works when the state is CONNECTED.
if (NS_WARN_IF(mState != PresentationConnectionState::Connected)) {
return;
}
// TODO Bug 1210340 - Support close semantics.
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
}
void
PresentationConnection::Terminate(ErrorResult& aRv)
{
// It only works when the state is CONNECTED.
if (NS_WARN_IF(mState != PresentationConnectionState::Connected)) {
return;
}
nsCOMPtr<nsIPresentationService> service =
do_GetService(PRESENTATION_SERVICE_CONTRACTID);
if(NS_WARN_IF(!service)) {
aRv.Throw(NS_ERROR_DOM_OPERATION_ERR);
return;
}
NS_WARN_IF(NS_FAILED(service->TerminateSession(mId)));
}
NS_IMETHODIMP
PresentationConnection::NotifyStateChange(const nsAString& aSessionId,
uint16_t aState)
{
if (!aSessionId.Equals(mId)) {
return NS_ERROR_INVALID_ARG;
}
PresentationConnectionState state;
switch (aState) {
case nsIPresentationSessionListener::STATE_CONNECTED:
state = PresentationConnectionState::Connected;
break;
case nsIPresentationSessionListener::STATE_CLOSED:
state = PresentationConnectionState::Closed;
break;
case nsIPresentationSessionListener::STATE_TERMINATED:
state = PresentationConnectionState::Terminated;
break;
default:
NS_WARNING("Unknown presentation session state.");
return NS_ERROR_INVALID_ARG;
}
if (mState == state) {
return NS_OK;
}
mState = state;
// Unregister session listener if the session is no longer connected.
if (mState == PresentationConnectionState::Terminated) {
nsCOMPtr<nsIPresentationService> service =
do_GetService(PRESENTATION_SERVICE_CONTRACTID);
if (NS_WARN_IF(!service)) {
return NS_ERROR_NOT_AVAILABLE;
}
nsresult rv = service->UnregisterSessionListener(mId);
if(NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
return DispatchStateChangeEvent();
}
NS_IMETHODIMP
PresentationConnection::NotifyMessage(const nsAString& aSessionId,
const nsACString& aData)
{
if (!aSessionId.Equals(mId)) {
return NS_ERROR_INVALID_ARG;
}
// No message should be expected when the session is not connected.
if (NS_WARN_IF(mState != PresentationConnectionState::Connected)) {
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
// Transform the data.
AutoJSAPI jsapi;
if (!jsapi.Init(GetOwner())) {
return NS_ERROR_FAILURE;
}
JSContext* cx = jsapi.cx();
JS::Rooted<JS::Value> jsData(cx);
NS_ConvertUTF8toUTF16 utf16Data(aData);
if(NS_WARN_IF(!ToJSValue(cx, utf16Data, &jsData))) {
return NS_ERROR_FAILURE;
}
return DispatchMessageEvent(jsData);
}
nsresult
PresentationConnection::DispatchStateChangeEvent()
{
RefPtr<AsyncEventDispatcher> asyncDispatcher =
new AsyncEventDispatcher(this, NS_LITERAL_STRING("statechange"), false);
return asyncDispatcher->PostDOMEvent();
}
nsresult
PresentationConnection::DispatchMessageEvent(JS::Handle<JS::Value> aData)
{
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(GetOwner());
if (NS_WARN_IF(!global)) {
return NS_ERROR_NOT_AVAILABLE;
}
// Get the origin.
nsAutoString origin;
nsresult rv = nsContentUtils::GetUTFOrigin(global->PrincipalOrNull(), origin);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
RefPtr<MessageEvent> messageEvent =
NS_NewDOMMessageEvent(this, nullptr, nullptr);
rv = messageEvent->InitMessageEvent(NS_LITERAL_STRING("message"),
false, false,
aData,
origin,
EmptyString(), nullptr);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
messageEvent->SetTrusted(true);
RefPtr<AsyncEventDispatcher> asyncDispatcher =
new AsyncEventDispatcher(this, static_cast<Event*>(messageEvent));
return asyncDispatcher->PostDOMEvent();
}