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/*
* Copyright (C) 2011, 2014 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
#if ENABLE(VIDEO_TRACK)
#include "CachedResourceClient.h"
#include "CachedResourceHandle.h"
#include "Timer.h"
#include "WebVTTParser.h"
#include <memory>
namespace WebCore {
class CachedTextTrack;
class Document;
class TextTrackLoader;
class ScriptExecutionContext;
class TextTrackLoaderClient {
public:
virtual ~TextTrackLoaderClient() { }
virtual void newCuesAvailable(TextTrackLoader*) = 0;
virtual void cueLoadingCompleted(TextTrackLoader*, bool loadingFailed) = 0;
virtual void newRegionsAvailable(TextTrackLoader*) = 0;
};
class TextTrackLoader : public CachedResourceClient, private WebVTTParserClient {
WTF_MAKE_NONCOPYABLE(TextTrackLoader);
WTF_MAKE_FAST_ALLOCATED;
public:
TextTrackLoader(TextTrackLoaderClient&, ScriptExecutionContext*);
virtual ~TextTrackLoader();
bool load(const URL&, const String& crossOriginMode, bool isInitiatingElementInUserAgentShadowTree);
void cancelLoad();
void getNewCues(Vector<RefPtr<TextTrackCue>>& outputCues);
void getNewRegions(Vector<RefPtr<VTTRegion>>& outputRegions);
private:
// CachedResourceClient
virtual void notifyFinished(CachedResource*) override;
virtual void deprecatedDidReceiveCachedResource(CachedResource*) override;
// WebVTTParserClient
virtual void newCuesParsed() override;
virtual void newRegionsParsed() override;
virtual void fileFailedToParse() override;
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;
ScriptExecutionContext* m_scriptExecutionContext;
Timer m_cueLoadTimer;
String m_crossOriginMode;
State m_state;
unsigned m_parseOffset;
bool m_newCuesAvailable;
};
} // namespace WebCore
#endif
#endif
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