NS_IMETHODIMP
SpeakerManager::HandleEvent(nsIDOMEvent* aEvent)
{
nsAutoString type;
aEvent->GetType(type);
if (!type.EqualsLiteral("visibilitychange")) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIDocShell> docshell = do_GetInterface(GetOwner());
NS_ENSURE_TRUE(docshell, NS_ERROR_FAILURE);
docshell->GetIsActive(&mVisible);
// If an app that has called forcespeaker=true is switched
// from the background to the foreground 'speakerforced'
// switches to true in all apps. I.e. the app doesn't have to
// call forcespeaker=true again when it comes into foreground.
SpeakerManagerService *service =
SpeakerManagerService::GetOrCreateSpeakerManagerService();
MOZ_ASSERT(service);
if (mVisible && mForcespeaker) {
service->ForceSpeaker(mForcespeaker, mVisible);
}
// If an application that has called forcespeaker=true, but no audio is
// currently playing in the app itself, if application switch to
// the background, we switch 'speakerforced' to false.
if (!mVisible && mForcespeaker) {
AudioChannelService* audioChannelService =
AudioChannelService::GetOrCreateAudioChannelService();
if (audioChannelService && !audioChannelService->AnyAudioChannelIsActive()) {
service->ForceSpeaker(false, mVisible);
}
}
return NS_OK;
}
