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/* -*- 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();
/**
* When this listener is not going to be used anymore, its owner should take
* a responsibility to call `Cancel()` to prevent this listener making any
* changes for the track element.
*/
bool IsCanceled() const;
void Cancel();
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;
nsresult mParserWrapperError;
bool mCancel = false;
};
} // namespace dom
} // namespace mozilla
#endif // mozilla_dom_WebVTTListener_h