dom/media/WebVTTListener.h
author Timothy Guan-tin Chien <timdream@gmail.com>
Mon, 07 Jan 2019 16:00:55 +0000
changeset 506594 2046aa36055220d9187f968fca3ab070d2de7665
parent 503396 0ceae9db9ec0be18daa1a279511ad305723185d4
child 507561 f0bd2be0b68c851510a7748ead565a5b149ce7ee
permissions -rw-r--r--
Bug 1516292 - Use isSameNode() to compare mozFullScreenElement and the video host element. r=edgar, a=RyanVM This does what's done in bug 1505547 but in a different way. For some reason, access shadowRoot.host in the function can trigger an assertion. this.video is a Proxy so it cannot be compared, but all its methods are proxied. Differential Revision: https://phabricator.services.mozilla.com/D15767

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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_WebVTTLoadListener_h
#define mozilla_dom_WebVTTLoadListener_h

#include "nsIWebVTTListener.h"
#include "nsIStreamListener.h"
#include "nsIChannelEventSink.h"
#include "nsIInterfaceRequestor.h"
#include "nsCOMPtr.h"
#include "nsCycleCollectionParticipant.h"

class nsIWebVTTParserWrapper;

namespace mozilla {
namespace dom {

class HTMLTrackElement;

class WebVTTListener final : public nsIWebVTTListener,
                             public nsIStreamListener,
                             public nsIChannelEventSink,
                             public nsIInterfaceRequestor {
  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  NS_DECL_NSIWEBVTTLISTENER
  NS_DECL_NSIREQUESTOBSERVER
  NS_DECL_NSISTREAMLISTENER
  NS_DECL_NSICHANNELEVENTSINK
  NS_DECL_NSIINTERFACEREQUESTOR

  NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(WebVTTListener, nsIStreamListener)

 public:
  explicit WebVTTListener(HTMLTrackElement* aElement);

  /**
   * Loads the WebVTTListener. Must call this in order for the listener to be
   * ready to parse data that is passed to it.
   */
  nsresult LoadResource();

 private:
  ~WebVTTListener();

  // List of error codes returned from the WebVTT parser that we care about.
  enum ErrorCodes { BadSignature = 0 };
  static nsresult ParseChunk(nsIInputStream* aInStream, void* aClosure,
                             const char* aFromSegment, uint32_t aToOffset,
                             uint32_t aCount, uint32_t* aWriteCount);

  RefPtr<HTMLTrackElement> mElement;
  nsCOMPtr<nsIWebVTTParserWrapper> mParserWrapper;
};

}  // namespace dom
}  // namespace mozilla

#endif  // mozilla_dom_WebVTTListener_h