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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#ifndef mozilla_dom_HTMLTrackElement_h
#define mozilla_dom_HTMLTrackElement_h
#include "mozilla/Attributes.h"
#include "mozilla/dom/HTMLMediaElement.h"
#include "mozilla/dom/TextTrack.h"
#include "nsCycleCollectionParticipant.h"
#include "nsGenericHTMLElement.h"
#include "nsGkAtoms.h"
class nsIContent;
namespace mozilla {
namespace dom {
class WebVTTListener;
class WindowDestroyObserver;
enum class TextTrackReadyState : uint8_t;
class HTMLTrackElement final : public nsGenericHTMLElement {
explicit HTMLTrackElement(
already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
// nsISupports
// HTMLTrackElement WebIDL
void GetKind(DOMString& aKind) const;
void SetKind(const nsAString& aKind, ErrorResult& aError) {
SetHTMLAttr(nsGkAtoms::kind, aKind, aError);
void GetSrc(DOMString& aSrc) const { GetHTMLURIAttr(nsGkAtoms::src, aSrc); }
void SetSrc(const nsAString& aSrc, ErrorResult& aError);
void GetSrclang(DOMString& aSrclang) const {
GetHTMLAttr(nsGkAtoms::srclang, aSrclang);
void GetSrclang(nsAString& aSrclang) const {
GetHTMLAttr(nsGkAtoms::srclang, aSrclang);
void SetSrclang(const nsAString& aSrclang, ErrorResult& aError) {
SetHTMLAttr(nsGkAtoms::srclang, aSrclang, aError);
void GetLabel(DOMString& aLabel) const {
GetHTMLAttr(nsGkAtoms::label, aLabel);
void GetLabel(nsAString& aLabel) const {
GetHTMLAttr(nsGkAtoms::label, aLabel);
void SetLabel(const nsAString& aLabel, ErrorResult& aError) {
SetHTMLAttr(nsGkAtoms::label, aLabel, aError);
bool Default() const { return GetBoolAttr(nsGkAtoms::_default); }
void SetDefault(bool aDefault, ErrorResult& aError) {
SetHTMLBoolAttr(nsGkAtoms::_default, aDefault, aError);
TextTrackReadyState ReadyState() const;
uint16_t ReadyStateForBindings() const {
return static_cast<uint16_t>(ReadyState());
void SetReadyState(TextTrackReadyState);
TextTrack* GetTrack();
virtual nsresult Clone(dom::NodeInfo*, nsINode** aResult) const override;
// Override ParseAttribute() to convert kind strings to enum values.
virtual bool ParseAttribute(int32_t aNamespaceID, nsAtom* aAttribute,
const nsAString& aValue,
nsIPrincipal* aMaybeScriptedPrincipal,
nsAttrValue& aResult) override;
// Override BindToTree() so that we can trigger a load when we become
// the child of a media element.
virtual nsresult BindToTree(BindContext&, nsINode& aParent) override;
virtual void UnbindFromTree(bool aNullParent) override;
virtual nsresult AfterSetAttr(int32_t aNameSpaceID, nsAtom* aName,
const nsAttrValue* aValue,
const nsAttrValue* aOldValue,
nsIPrincipal* aMaybeScriptedPrincipal,
bool aNotify) override;
void DispatchTrackRunnable(const nsString& aEventName);
void DispatchTrustedEvent(const nsAString& aName);
void DispatchTestEvent(const nsAString& aName);
void CancelChannelAndListener();
// Only load resource for the non-disabled track with media parent.
void MaybeDispatchLoadResource();
virtual ~HTMLTrackElement();
virtual JSObject* WrapNode(JSContext* aCx,
JS::Handle<JSObject*> aGivenProto) override;
void OnChannelRedirect(nsIChannel* aChannel, nsIChannel* aNewChannel,
uint32_t aFlags);
friend class TextTrackCue;
friend class WebVTTListener;
RefPtr<TextTrack> mTrack;
nsCOMPtr<nsIChannel> mChannel;
RefPtr<HTMLMediaElement> mMediaParent;
RefPtr<WebVTTListener> mListener;
void CreateTextTrack();
// Open a new channel to the HTMLTrackElement's src attribute and call
// mListener's LoadResource().
void LoadResource(RefPtr<WebVTTListener>&& aWebVTTListener);
bool mLoadResourceDispatched;
void MaybeClearAllCues();
RefPtr<WindowDestroyObserver> mWindowDestroyObserver;
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_HTMLTrackElement_h