1/* 2 * Copyright (C) 2011 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef TextTrackLoader_h 27#define TextTrackLoader_h 28 29#if ENABLE(VIDEO_TRACK) 30 31#include "CachedResourceClient.h" 32#include "CachedResourceHandle.h" 33#include "Timer.h" 34#include "WebVTTParser.h" 35#include <wtf/OwnPtr.h> 36 37namespace WebCore { 38 39class CachedTextTrack; 40class Document; 41class TextTrackLoader; 42class ScriptExecutionContext; 43 44class TextTrackLoaderClient { 45public: 46 virtual ~TextTrackLoaderClient() { } 47 48 virtual bool shouldLoadCues(TextTrackLoader*) = 0; 49 virtual void newCuesAvailable(TextTrackLoader*) = 0; 50 virtual void cueLoadingStarted(TextTrackLoader*) = 0; 51 virtual void cueLoadingCompleted(TextTrackLoader*, bool loadingFailed) = 0; 52#if ENABLE(WEBVTT_REGIONS) 53 virtual void newRegionsAvailable(TextTrackLoader*) = 0; 54#endif 55}; 56 57class TextTrackLoader : public CachedResourceClient, private WebVTTParserClient { 58 WTF_MAKE_NONCOPYABLE(TextTrackLoader); 59 WTF_MAKE_FAST_ALLOCATED; 60public: 61 static PassOwnPtr<TextTrackLoader> create(TextTrackLoaderClient* client, ScriptExecutionContext* context) 62 { 63 return adoptPtr(new TextTrackLoader(client, context)); 64 } 65 virtual ~TextTrackLoader(); 66 67 bool load(const KURL&, const String& crossOriginMode); 68 void cancelLoad(); 69 void getNewCues(Vector<RefPtr<TextTrackCue> >& outputCues); 70#if ENABLE(WEBVTT_REGIONS) 71 void getNewRegions(Vector<RefPtr<TextTrackRegion> >& outputRegions); 72#endif 73private: 74 75 // CachedResourceClient 76 virtual void notifyFinished(CachedResource*); 77 virtual void deprecatedDidReceiveCachedResource(CachedResource*); 78 79 // WebVTTParserClient 80 virtual void newCuesParsed(); 81#if ENABLE(WEBVTT_REGIONS) 82 virtual void newRegionsParsed(); 83#endif 84 virtual void fileFailedToParse(); 85 86 TextTrackLoader(TextTrackLoaderClient*, ScriptExecutionContext*); 87 88 void processNewCueData(CachedResource*); 89 void cueLoadTimerFired(Timer<TextTrackLoader>*); 90 void corsPolicyPreventedLoad(); 91 92 enum State { Idle, Loading, Finished, Failed }; 93 94 TextTrackLoaderClient* m_client; 95 OwnPtr<WebVTTParser> m_cueParser; 96 CachedResourceHandle<CachedTextTrack> m_cachedCueData; 97 ScriptExecutionContext* m_scriptExecutionContext; 98 Timer<TextTrackLoader> m_cueLoadTimer; 99 String m_crossOriginMode; 100 State m_state; 101 unsigned m_parseOffset; 102 bool m_newCuesAvailable; 103}; 104 105} // namespace WebCore 106 107#endif 108#endif 109