1 files changed, 137 insertions, 0 deletions
diff --git a/dom/html/HTMLTrackElement.h b/dom/html/HTMLTrackElement.h
new file mode 100644
index 0000000000..63e09f7c9e
--- /dev/null
+++ b/dom/html/HTMLTrackElement.h
@@ -0,0 +1,137 @@
+/* -*- 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 http://mozilla.org/MPL/2.0/. */
+
+#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::dom {
+
+class WebVTTListener;
+class WindowDestroyObserver;
+enum class TextTrackReadyState : uint8_t;
+
+class HTMLTrackElement final : public nsGenericHTMLElement {
+ public:
+  explicit HTMLTrackElement(
+      already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo);
+
+  // nsISupports
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(HTMLTrackElement,
+                                           nsGenericHTMLElement)
+
+  // 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();
+
+ protected:
+  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();
+
+ private:
+  // 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 mozilla::dom
+
+#endif  // mozilla_dom_HTMLTrackElement_h