mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
90 lines
3.0 KiB
C++
90 lines
3.0 KiB
C++
/* -*- 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 "nsIStreamListener.h"
|
|
#include "nsIChannelEventSink.h"
|
|
#include "nsIInterfaceRequestor.h"
|
|
#include "nsIObserver.h"
|
|
#include "nsAutoPtr.h"
|
|
#include "nsAutoRef.h"
|
|
#include "nsCycleCollectionParticipant.h"
|
|
#include "mozilla/dom/HTMLTrackElement.h"
|
|
|
|
struct webvtt_parser_t;
|
|
struct webvtt_cue;
|
|
typedef int webvtt_error;
|
|
|
|
template <>
|
|
class nsAutoRefTraits<webvtt_parser_t> : public nsPointerRefTraits<webvtt_parser_t>
|
|
{
|
|
public:
|
|
static void Release(webvtt_parser_t* aParser) {
|
|
// Call parser dtor here.
|
|
}
|
|
};
|
|
|
|
namespace mozilla {
|
|
namespace dom {
|
|
/**
|
|
* Class that manages the libwebvtt parsing library and functions as an
|
|
* interface between Gecko and libwebvtt.
|
|
*
|
|
* Currently it's only designed to work with an HTMLTrackElement. The
|
|
* HTMLTrackElement controls the lifetime of the WebVTTLoadListener.
|
|
*
|
|
* The workflow of this class is as follows:
|
|
* - Gets Loaded via an HTMLTrackElement class.
|
|
* - As the HTMLTrackElement class gets new data WebVTTLoadListener's
|
|
* OnDataAvailable() function is called and data is passed to the libwebvtt
|
|
* parser.
|
|
* - When the libwebvtt parser has finished a cue it will call the callbacks
|
|
* that are exposed by the WebVTTLoadListener -- OnParsedCueWebVTTCallBack or
|
|
* OnReportErrorWebVTTCallBack if it has encountered an error.
|
|
* - When it has returned a cue successfully the WebVTTLoadListener will create
|
|
* a new TextTrackCue and add it to the HTMLTrackElement's TextTrack.
|
|
*/
|
|
class WebVTTLoadListener MOZ_FINAL : public nsIStreamListener,
|
|
public nsIChannelEventSink,
|
|
public nsIInterfaceRequestor
|
|
{
|
|
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
|
|
NS_DECL_NSIREQUESTOBSERVER
|
|
NS_DECL_NSISTREAMLISTENER
|
|
NS_DECL_NSICHANNELEVENTSINK
|
|
NS_DECL_NSIINTERFACEREQUESTOR
|
|
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(WebVTTLoadListener,
|
|
nsIStreamListener)
|
|
|
|
public:
|
|
WebVTTLoadListener(HTMLTrackElement* aElement);
|
|
~WebVTTLoadListener();
|
|
|
|
// Loads the libwebvtt parser. Must call this function in order to the
|
|
// WebVTTLoadListener to be ready to accept data.
|
|
nsresult LoadResource();
|
|
|
|
private:
|
|
static NS_METHOD ParseChunk(nsIInputStream* aInStream, void* aClosure,
|
|
const char* aFromSegment, uint32_t aToOffset,
|
|
uint32_t aCount, uint32_t* aWriteCount);
|
|
|
|
nsRefPtr<HTMLTrackElement> mElement;
|
|
nsAutoRef<webvtt_parser_t> mParser;
|
|
|
|
void OnParsedCue(webvtt_cue* aCue);
|
|
int OnReportError(uint32_t aLine, uint32_t aCol, webvtt_error aError);
|
|
};
|
|
|
|
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_dom_WebVTTLoadListener_h
|