text: /*
   * Copyright (C) 2011 Apple Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   * THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef TextTrackLoader_h
  #define TextTrackLoader_h
  
  #include "core/fetch/RawResource.h"
  #include "core/fetch/ResourceOwner.h"
  #include "core/html/track/vtt/VTTParser.h"
  #include "platform/Timer.h"
  #include "platform/heap/Handle.h"
  #include "wtf/OwnPtr.h"
  
  namespace blink {
  
  class Document;
  class TextTrackLoader;
  
  class TextTrackLoaderClient : public ResourceOwner<RawResource> {
  public:
      ~TextTrackLoaderClient() override {}
  
      virtual void newCuesAvailable(TextTrackLoader*) = 0;
      virtual void cueLoadingCompleted(TextTrackLoader*, bool loadingFailed) = 0;
      virtual void newRegionsAvailable(TextTrackLoader*) = 0;
  };
  
  class TextTrackLoader final : public NoBaseWillBeGarbageCollectedFinalized<TextTrackLoader>, public ResourceOwner<RawResource>, private VTTParserClient {
      WTF_MAKE_NONCOPYABLE(TextTrackLoader);
      WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED(TextTrackLoader);
  public:
      static PassOwnPtrWillBeRawPtr<TextTrackLoader> create(TextTrackLoaderClient& client, Document& document)
      {
          return adoptPtrWillBeNoop(new TextTrackLoader(client, document));
      }
      ~TextTrackLoader() override;
  
      bool load(const KURL&, const AtomicString& crossOriginMode);
      void cancelLoad();
  
      enum State { Idle, Loading, Finished, Failed };
      State loadState() { return m_state; }
  
      void getNewCues(WillBeHeapVector<RefPtrWillBeMember<TextTrackCue>>& outputCues);
      void getNewRegions(WillBeHeapVector<RefPtrWillBeMember<VTTRegion>>& outputRegions);
  
      DECLARE_TRACE();
  
  private:
      // RawResourceClient
      void dataReceived(Resource*, const char* data, unsigned length) override;
      void notifyFinished(Resource*) override;
  
      // VTTParserClient
      void newCuesParsed() override;
      void newRegionsParsed() override;
      void fileFailedToParse() override;
  
      TextTrackLoader(TextTrackLoaderClient&, Document&);
  
      void cueLoadTimerFired(Timer<TextTrackLoader>*);
      void corsPolicyPreventedLoad(SecurityOrigin*, const KURL&);
  
      Document& document() const { return *m_document; }
  
      TextTrackLoaderClient& m_client;
      OwnPtrWillBeMember<VTTParser> m_cueParser;
      // FIXME: Remove this pointer and get the Document from m_client.
      RawPtrWillBeMember<Document> m_document;
      Timer<TextTrackLoader> m_cueLoadTimer;
      State m_state;
      bool m_newCuesAvailable;
  };
  
  } // namespace blink
  
  #endif
  