NS_IMETHODIMP
PresentationService::Observe(nsISupports* aSubject, const char* aTopic,
const char16_t* aData) {
if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
HandleShutdown();
return NS_OK;
} else if (!strcmp(aTopic, PRESENTATION_DEVICE_CHANGE_TOPIC)) {
// Ignore the "update" case here, since we only care about the arrival and
// removal of the device.
if (!NS_strcmp(aData, u"add")) {
nsCOMPtr<nsIPresentationDevice> device = do_QueryInterface(aSubject);
if (NS_WARN_IF(!device)) {
return NS_ERROR_FAILURE;
}
return HandleDeviceAdded(device);
} else if (!NS_strcmp(aData, u"remove")) {
return HandleDeviceRemoved();
}
return NS_OK;
} else if (!strcmp(aTopic, PRESENTATION_SESSION_REQUEST_TOPIC)) {
nsCOMPtr<nsIPresentationSessionRequest> request(
do_QueryInterface(aSubject));
if (NS_WARN_IF(!request)) {
return NS_ERROR_FAILURE;
}
return HandleSessionRequest(request);
} else if (!strcmp(aTopic, PRESENTATION_TERMINATE_REQUEST_TOPIC)) {
nsCOMPtr<nsIPresentationTerminateRequest> request(
do_QueryInterface(aSubject));
if (NS_WARN_IF(!request)) {
return NS_ERROR_FAILURE;
}
return HandleTerminateRequest(request);
} else if (!strcmp(aTopic, PRESENTATION_RECONNECT_REQUEST_TOPIC)) {
nsCOMPtr<nsIPresentationSessionRequest> request(
do_QueryInterface(aSubject));
if (NS_WARN_IF(!request)) {
return NS_ERROR_FAILURE;
}
return HandleReconnectRequest(request);
} else if (!strcmp(aTopic, "profile-after-change")) {
// It's expected since we add and entry to |kLayoutCategories| in
// |nsLayoutModule.cpp| to launch this service earlier.
return NS_OK;
}
MOZ_ASSERT(false, "Unexpected topic for PresentationService");
return NS_ERROR_UNEXPECTED;
}
nsresult
PresentationService::HandleReconnectRequest(nsIPresentationSessionRequest* aRequest)
{
nsCOMPtr<nsIPresentationControlChannel> ctrlChannel;
nsresult rv = aRequest->GetControlChannel(getter_AddRefs(ctrlChannel));
if (NS_WARN_IF(NS_FAILED(rv) || !ctrlChannel)) {
return rv;
}
nsAutoString sessionId;
rv = aRequest->GetPresentationId(sessionId);
if (NS_WARN_IF(NS_FAILED(rv))) {
ctrlChannel->Disconnect(rv);
return rv;
}
uint64_t windowId;
rv = GetWindowIdBySessionIdInternal(sessionId,
nsIPresentationService::ROLE_RECEIVER,
&windowId);
if (NS_WARN_IF(NS_FAILED(rv))) {
ctrlChannel->Disconnect(rv);
return rv;
}
RefPtr<PresentationSessionInfo> info =
GetSessionInfo(sessionId, nsIPresentationService::ROLE_RECEIVER);
if (NS_WARN_IF(!info)) {
// Cannot reconnect non-existed session
ctrlChannel->Disconnect(NS_ERROR_DOM_OPERATION_ERR);
return NS_ERROR_DOM_ABORT_ERR;
}
nsAutoString url;
rv = aRequest->GetUrl(url);
if (NS_WARN_IF(NS_FAILED(rv))) {
ctrlChannel->Disconnect(rv);
return rv;
}
// Make sure the url is the same as the previous one.
if (NS_WARN_IF(!info->GetUrl().Equals(url))) {
ctrlChannel->Disconnect(rv);
return rv;
}
return HandleSessionRequest(aRequest);
}
