michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef mozilla_dom_WebVTTLoadListener_h
michael@0: #define mozilla_dom_WebVTTLoadListener_h
michael@0: 
michael@0: #include "nsIWebVTTListener.h"
michael@0: #include "nsIStreamListener.h"
michael@0: #include "nsIChannelEventSink.h"
michael@0: #include "nsAutoPtr.h"
michael@0: #include "nsIInterfaceRequestor.h"
michael@0: #include "nsCycleCollectionParticipant.h"
michael@0: 
michael@0: class nsIWebVTTParserWrapper;
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace dom {
michael@0: 
michael@0: class HTMLTrackElement;
michael@0: 
michael@0: class WebVTTListener MOZ_FINAL : public nsIWebVTTListener,
michael@0:                                  public nsIStreamListener,
michael@0:                                  public nsIChannelEventSink,
michael@0:                                  public nsIInterfaceRequestor
michael@0: {
michael@0:   NS_DECL_CYCLE_COLLECTING_ISUPPORTS
michael@0:   NS_DECL_NSIWEBVTTLISTENER
michael@0:   NS_DECL_NSIREQUESTOBSERVER
michael@0:   NS_DECL_NSISTREAMLISTENER
michael@0:   NS_DECL_NSICHANNELEVENTSINK
michael@0:   NS_DECL_NSIINTERFACEREQUESTOR
michael@0: 
michael@0:   NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(WebVTTListener,
michael@0:                                            nsIStreamListener)
michael@0: 
michael@0: public:
michael@0:   WebVTTListener(HTMLTrackElement* aElement);
michael@0:   ~WebVTTListener();
michael@0: 
michael@0:   /**
michael@0:    * Loads the WebVTTListener. Must call this in order for the listener to be
michael@0:    * ready to parse data that is passed to it.
michael@0:    */
michael@0:   nsresult LoadResource();
michael@0: 
michael@0: private:
michael@0:   // List of error codes returned from the WebVTT parser that we care about.
michael@0:   enum ErrorCodes {
michael@0:     BadSignature = 0
michael@0:   };
michael@0:   static NS_METHOD ParseChunk(nsIInputStream* aInStream, void* aClosure,
michael@0:                               const char* aFromSegment, uint32_t aToOffset,
michael@0:                               uint32_t aCount, uint32_t* aWriteCount);
michael@0: 
michael@0:   nsRefPtr<HTMLTrackElement> mElement;
michael@0:   nsCOMPtr<nsIWebVTTParserWrapper> mParserWrapper;
michael@0: };
michael@0: 
michael@0: } // namespace dom
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif // mozilla_dom_WebVTTListener_h