NS_IMETHODIMP
ScreenOrientation::VisibleEventListener::HandleEvent(nsIDOMEvent* aEvent)
{
// Document may have become visible, if the page is visible, run the steps
// following the "now visible algorithm" as specified.
nsCOMPtr<EventTarget> target = aEvent->InternalDOMEvent()->GetCurrentTarget();
MOZ_ASSERT(target);
nsCOMPtr<nsIDocument> doc = do_QueryInterface(target);
if (!doc || doc->Hidden()) {
return NS_OK;
}
auto* win = nsGlobalWindow::Cast(doc->GetInnerWindow());
if (!win) {
return NS_OK;
}
ErrorResult rv;
nsScreen* screen = win->GetScreen(rv);
if (NS_WARN_IF(rv.Failed())) {
return rv.StealNSResult();
}
MOZ_ASSERT(screen);
ScreenOrientation* orientation = screen->Orientation();
MOZ_ASSERT(orientation);
rv = target->RemoveSystemEventListener(NS_LITERAL_STRING("visibilitychange"),
this, true);
if (NS_WARN_IF(rv.Failed())) {
return rv.StealNSResult();
}
if (doc->CurrentOrientationType() != orientation->DeviceType(CallerType::System)) {
doc->SetCurrentOrientation(orientation->DeviceType(CallerType::System),
orientation->DeviceAngle(CallerType::System));
Promise* pendingPromise = doc->GetOrientationPendingPromise();
if (pendingPromise) {
pendingPromise->MaybeResolveWithUndefined();
doc->SetOrientationPendingPromise(nullptr);
}
nsCOMPtr<nsIRunnable> runnable = NewRunnableMethod(orientation,
&ScreenOrientation::DispatchChangeEvent);
rv = NS_DispatchToMainThread(runnable);
if (NS_WARN_IF(rv.Failed())) {
return rv.StealNSResult();
}
}
return NS_OK;
}
