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 #include "core/fetch/RawResource.h" 30 #include "core/fetch/ResourceOwner.h" 31 #include "core/html/track/vtt/VTTParser.h" 32 #include "platform/Timer.h" 33 #include "platform/heap/Handle.h" 34 #include "wtf/OwnPtr.h" 35 36 namespace blink { 37 38 class Document; 39 class TextTrackLoader; 40 41 class TextTrackLoaderClient : public ResourceOwner<RawResource> { 42 public: ~TextTrackLoaderClient()43 virtual ~TextTrackLoaderClient() { } 44 45 virtual void newCuesAvailable(TextTrackLoader*) = 0; 46 virtual void cueLoadingCompleted(TextTrackLoader*, bool loadingFailed) = 0; 47 virtual void newRegionsAvailable(TextTrackLoader*) = 0; 48 }; 49 50 class TextTrackLoader FINAL : public NoBaseWillBeGarbageCollectedFinalized<TextTrackLoader>, public ResourceOwner<RawResource>, private VTTParserClient { 51 WTF_MAKE_NONCOPYABLE(TextTrackLoader); 52 WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED; 53 public: create(TextTrackLoaderClient & client,Document & document)54 static PassOwnPtrWillBeRawPtr<TextTrackLoader> create(TextTrackLoaderClient& client, Document& document) 55 { 56 return adoptPtrWillBeNoop(new TextTrackLoader(client, document)); 57 } 58 virtual ~TextTrackLoader(); 59 60 bool load(const KURL&, const AtomicString& crossOriginMode); 61 void cancelLoad(); 62 63 enum State { Idle, Loading, Finished, Failed }; loadState()64 State loadState() { return m_state; } 65 66 void getNewCues(WillBeHeapVector<RefPtrWillBeMember<VTTCue> >& outputCues); 67 void getNewRegions(WillBeHeapVector<RefPtrWillBeMember<VTTRegion> >& outputRegions); 68 69 void trace(Visitor*); 70 71 private: 72 // RawResourceClient 73 virtual void dataReceived(Resource*, const char* data, int length) OVERRIDE; 74 virtual void notifyFinished(Resource*) OVERRIDE; 75 76 // VTTParserClient 77 virtual void newCuesParsed() OVERRIDE; 78 virtual void newRegionsParsed() OVERRIDE; 79 virtual void fileFailedToParse() OVERRIDE; 80 81 TextTrackLoader(TextTrackLoaderClient&, Document&); 82 83 void cueLoadTimerFired(Timer<TextTrackLoader>*); 84 void corsPolicyPreventedLoad(SecurityOrigin*, const KURL&); 85 document()86 Document& document() const { return *m_document; } 87 88 TextTrackLoaderClient& m_client; 89 OwnPtrWillBeMember<VTTParser> m_cueParser; 90 // FIXME: Remove this pointer and get the Document from m_client. 91 RawPtrWillBeMember<Document> m_document; 92 Timer<TextTrackLoader> m_cueLoadTimer; 93 State m_state; 94 bool m_newCuesAvailable; 95 }; 96 97 } // namespace blink 98 99 #endif 100