fire event

gistfile1.cpp

nsresult
XHRSampleListener::FireOnResultEvent(const nsAString &response)
{
  NS_ABORT_IF_FALSE(NS_IsMainThread(), "Not running on main thread");

  nsresult rv;
  nsCOMPtr<nsIDOMEvent> event;
  rv = NS_NewDOMEvent(getter_AddRefs(event), nullptr, nullptr);
  NS_ENSURE_SUCCESS(rv, rv);

  rv = event->InitEvent(NS_LITERAL_STRING("result"), false, false);
  NS_ENSURE_SUCCESS(rv, rv);

  rv = event->SetTrusted(true);
  NS_ENSURE_SUCCESS(rv, rv);

  nsCOMPtr<nsIDOMWindow> aWindow;
  nsCOMPtr<nsIDOMDocument> aDoc;
  nsCOMPtr<nsIDOMEventTarget> tWindow;

  nsIFocusManager* fm = nsFocusManager::GetFocusManager();
  if(!fm) return NS_ERROR_FAILURE;

  rv = fm->GetFocusedWindow(getter_AddRefs(aWindow));
  NS_ENSURE_SUCCESS(rv, rv);
  tWindow = do_QueryInterface(aWindow);

  rv = aWindow->GetDocument(getter_AddRefs(aDoc));
  NS_ENSURE_SUCCESS(rv, rv);
  
  nsString uri;
  rv = aDoc->GetDocumentURI(uri);
  NS_ENSURE_SUCCESS(rv, rv);
  //NS_ASSERTION(0, nsPrintfCString("URI: %s\n", NS_ConvertUTF16toUTF8(uri).get()).get());

  nsCOMPtr<nsIDOMEventTarget> root;
  rv = aWindow->GetWindowRoot(getter_AddRefs(root));
  NS_ENSURE_SUCCESS(rv, rv);

  bool ret;
  rv = root->DispatchEvent(event, &ret);
  NS_ASSERTION(ret, "dispatch");
  return rv;
}

js

<script type="text/javascript">
    var recognition = new SpeechRecognition();
    
    function boo(event) {
        alert("HI");
        if (event.results.length > 0) {
            var result = event.results[0];
            for (var i = 0; i < result.length; ++i) {
                var text = result[i].transcript;
                select.options[i] = new Option(text, text);
            }
        }
    }

    recognition.onresult = boo;
    window.onresult = boo;
</script>

<select id="select"></select>
<button onclick="recognition.start()">Click to Speak</button>
<button onclick="recognition.stop()">Stop!</button>