TextTrack*
HTMLTrackElement::GetTrack()
{
if (!mTrack) {
CreateTextTrack();
}
return mTrack;
}
void
HTMLTrackElement::LoadResource()
{
// Find our 'src' url
nsAutoString src;
if (!GetAttr(kNameSpaceID_None, nsGkAtoms::src, src)) {
return;
}
nsCOMPtr<nsIURI> uri;
nsresult rv = NewURIFromString(src, getter_AddRefs(uri));
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
LOG(LogLevel::Info, ("%p Trying to load from src=%s", this,
NS_ConvertUTF16toUTF8(src).get()));
if (mChannel) {
mChannel->Cancel(NS_BINDING_ABORTED);
mChannel = nullptr;
}
// We may already have a TextTrack at this point if GetTrack() has already
// been called. This happens, for instance, if script tries to get the
// TextTrack before its mTrackElement has been bound to the DOM tree.
if (!mTrack) {
CreateTextTrack();
}
nsCOMPtr<nsIChannel> channel;
nsCOMPtr<nsILoadGroup> loadGroup = OwnerDoc()->GetDocumentLoadGroup();
rv = NS_NewChannel(getter_AddRefs(channel),
uri,
static_cast<Element*>(this),
nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_INHERITS,
nsIContentPolicy::TYPE_INTERNAL_TRACK,
loadGroup);
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
mListener = new WebVTTListener(this);
rv = mListener->LoadResource();
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
channel->SetNotificationCallbacks(mListener);
LOG(LogLevel::Debug, ("opening webvtt channel"));
rv = channel->AsyncOpen2(mListener);
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
mChannel = channel;
}
nsresult
HTMLTrackElement::BindToTree(nsIDocument* aDocument,
nsIContent* aParent,
nsIContent* aBindingParent,
bool aCompileEventHandlers)
{
nsresult rv = nsGenericHTMLElement::BindToTree(aDocument,
aParent,
aBindingParent,
aCompileEventHandlers);
NS_ENSURE_SUCCESS(rv, rv);
if (!aDocument) {
return NS_OK;
}
LOG(LogLevel::Debug, ("Track Element bound to tree."));
if (!aParent || !aParent->IsNodeOfType(nsINode::eMEDIA)) {
return NS_OK;
}
// Store our parent so we can look up its frame for display.
if (!mMediaParent) {
mMediaParent = static_cast<HTMLMediaElement*>(aParent);
// TODO: separate notification for 'alternate' tracks?
mMediaParent->NotifyAddedSource();
LOG(LogLevel::Debug, ("Track element sent notification to parent."));
// We may already have a TextTrack at this point if GetTrack() has already
// been called. This happens, for instance, if script tries to get the
// TextTrack before its mTrackElement has been bound to the DOM tree.
if (!mTrack) {
CreateTextTrack();
}
RefPtr<Runnable> r = NewRunnableMethod(this, &HTMLTrackElement::LoadResource);
mMediaParent->RunInStableState(r);
}
return NS_OK;
}
void
HTMLTrackElement::SetSrc(const nsAString& aSrc, ErrorResult& aError)
{
SetHTMLAttr(nsGkAtoms::src, aSrc, aError);
uint16_t oldReadyState = ReadyState();
SetReadyState(TextTrackReadyState::NotLoaded);
if (!mMediaParent) {
return;
}
if (mTrack && (oldReadyState != TextTrackReadyState::NotLoaded)) {
// Remove all the cues in MediaElement.
mMediaParent->RemoveTextTrack(mTrack);
// Recreate mTrack.
CreateTextTrack();
}
// Stop WebVTTListener.
mListener = nullptr;
if (mChannel) {
mChannel->Cancel(NS_BINDING_ABORTED);
mChannel = nullptr;
}
DispatchLoadResource();
}
void
HTMLTrackElement::LoadResource()
{
// Find our 'src' url
nsAutoString src;
if (!GetAttr(kNameSpaceID_None, nsGkAtoms::src, src)) {
return;
}
nsCOMPtr<nsIURI> uri;
nsresult rv = NewURIFromString(src, getter_AddRefs(uri));
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
LOG(PR_LOG_ALWAYS, ("%p Trying to load from src=%s", this,
NS_ConvertUTF16toUTF8(src).get()));
if (mChannel) {
mChannel->Cancel(NS_BINDING_ABORTED);
mChannel = nullptr;
}
rv = nsContentUtils::GetSecurityManager()->
CheckLoadURIWithPrincipal(NodePrincipal(), uri,
nsIScriptSecurityManager::STANDARD);
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
int16_t shouldLoad = nsIContentPolicy::ACCEPT;
rv = NS_CheckContentLoadPolicy(nsIContentPolicy::TYPE_MEDIA,
uri,
NodePrincipal(),
static_cast<Element*>(this),
NS_LITERAL_CSTRING("text/vtt"), // mime type
nullptr, // extra
&shouldLoad,
nsContentUtils::GetContentPolicy(),
nsContentUtils::GetSecurityManager());
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
if (NS_CP_REJECTED(shouldLoad)) {
return;
}
CreateTextTrack();
// Check for a Content Security Policy to pass down to the channel
// created to load the media content.
nsCOMPtr<nsIChannelPolicy> channelPolicy;
nsCOMPtr<nsIContentSecurityPolicy> csp;
rv = NodePrincipal()->GetCsp(getter_AddRefs(csp));
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
if (csp) {
channelPolicy = do_CreateInstance("@mozilla.org/nschannelpolicy;1");
if (!channelPolicy) {
return;
}
channelPolicy->SetContentSecurityPolicy(csp);
channelPolicy->SetLoadType(nsIContentPolicy::TYPE_MEDIA);
}
nsCOMPtr<nsIChannel> channel;
nsCOMPtr<nsILoadGroup> loadGroup = OwnerDoc()->GetDocumentLoadGroup();
rv = NS_NewChannel(getter_AddRefs(channel),
uri,
nullptr,
loadGroup,
nullptr,
nsIRequest::LOAD_NORMAL,
channelPolicy);
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
mLoadListener = new WebVTTLoadListener(this);
rv = mLoadListener->LoadResource();
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
channel->SetNotificationCallbacks(mLoadListener);
LOG(PR_LOG_DEBUG, ("opening webvtt channel"));
rv = channel->AsyncOpen(mLoadListener, nullptr);
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
mChannel = channel;
}
void
HTMLTrackElement::LoadResource()
{
// Find our 'src' url
nsAutoString src;
if (!GetAttr(kNameSpaceID_None, nsGkAtoms::src, src)) {
return;
}
nsCOMPtr<nsIURI> uri;
nsresult rv = NewURIFromString(src, getter_AddRefs(uri));
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
LOG(LogLevel::Info, ("%p Trying to load from src=%s", this,
NS_ConvertUTF16toUTF8(src).get()));
if (mChannel) {
mChannel->Cancel(NS_BINDING_ABORTED);
mChannel = nullptr;
}
rv = nsContentUtils::GetSecurityManager()->
CheckLoadURIWithPrincipal(NodePrincipal(), uri,
nsIScriptSecurityManager::STANDARD);
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
int16_t shouldLoad = nsIContentPolicy::ACCEPT;
rv = NS_CheckContentLoadPolicy(nsIContentPolicy::TYPE_MEDIA,
uri,
NodePrincipal(),
static_cast<Element*>(this),
NS_LITERAL_CSTRING("text/vtt"), // mime type
nullptr, // extra
&shouldLoad,
nsContentUtils::GetContentPolicy(),
nsContentUtils::GetSecurityManager());
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
if (NS_CP_REJECTED(shouldLoad)) {
return;
}
// We may already have a TextTrack at this point if GetTrack() has already
// been called. This happens, for instance, if script tries to get the
// TextTrack before its mTrackElement has been bound to the DOM tree.
if (!mTrack) {
CreateTextTrack();
}
nsCOMPtr<nsIChannel> channel;
nsCOMPtr<nsILoadGroup> loadGroup = OwnerDoc()->GetDocumentLoadGroup();
rv = NS_NewChannel(getter_AddRefs(channel),
uri,
static_cast<Element*>(this),
nsILoadInfo::SEC_NORMAL,
nsIContentPolicy::TYPE_MEDIA,
loadGroup);
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
mListener = new WebVTTListener(this);
rv = mListener->LoadResource();
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
channel->SetNotificationCallbacks(mListener);
LOG(LogLevel::Debug, ("opening webvtt channel"));
rv = channel->AsyncOpen(mListener, nullptr);
NS_ENSURE_TRUE_VOID(NS_SUCCEEDED(rv));
mChannel = channel;
}