#pragma once
#if ENABLE(VIDEO)
#include "CachedResourceClient.h"
#include "CachedResourceHandle.h"
#include "Timer.h"
#include "WebVTTParser.h"
#include <memory>
namespace WebCore {
class CachedTextTrack;
class Document;
class HTMLTrackElement;
class TextTrackLoader;
class VTTCue;
class TextTrackLoaderClient {
public:
virtual ~TextTrackLoaderClient() = default;
virtual void newCuesAvailable(TextTrackLoader&) = 0;
virtual void cueLoadingCompleted(TextTrackLoader&, bool loadingFailed) = 0;
virtual void newRegionsAvailable(TextTrackLoader&) = 0;
virtual void newStyleSheetsAvailable(TextTrackLoader&) = 0;
};
class TextTrackLoader final : public CachedResourceClient, private WebVTTParserClient {
WTF_MAKE_NONCOPYABLE(TextTrackLoader);
WTF_MAKE_FAST_ALLOCATED;
public:
TextTrackLoader(TextTrackLoaderClient&, Document&);
virtual ~TextTrackLoader();
bool load(const URL&, HTMLTrackElement&);
void cancelLoad();
Vector<Ref<VTTCue>> getNewCues();
Vector<Ref<VTTRegion>> getNewRegions();
Vector<String> getNewStyleSheets();
private:
void notifyFinished(CachedResource&, const NetworkLoadMetrics&) final;
void deprecatedDidReceiveCachedResource(CachedResource&) final;
void newCuesParsed() final;
void newRegionsParsed() final;
void newStyleSheetsParsed() final;
void fileFailedToParse() final;
void processNewCueData(CachedResource&);
void cueLoadTimerFired();
void corsPolicyPreventedLoad();
enum State { Idle, Loading, Finished, Failed };
TextTrackLoaderClient& m_client;
std::unique_ptr<WebVTTParser> m_cueParser;
CachedResourceHandle<CachedTextTrack> m_resource;
Document& m_document;
Timer m_cueLoadTimer;
State m_state { Idle };
unsigned m_parseOffset { 0 };
bool m_newCuesAvailable { false };
};
}
#endif // ENABLE(VIDEO)