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      1 /*
      2  * Copyright (C) 2012 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 COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "core/html/track/InbandTextTrack.h"
     28 
     29 #include "bindings/v8/ExceptionStatePlaceholder.h"
     30 #include "core/html/HTMLMediaElement.h"
     31 #include "core/html/track/vtt/VTTCue.h"
     32 #include "platform/Logging.h"
     33 #include "public/platform/WebInbandTextTrack.h"
     34 #include "public/platform/WebString.h"
     35 #include <math.h>
     36 
     37 using blink::WebInbandTextTrack;
     38 using blink::WebString;
     39 
     40 namespace WebCore {
     41 
     42 PassRefPtrWillBeRawPtr<InbandTextTrack> InbandTextTrack::create(Document& document, WebInbandTextTrack* webTrack)
     43 {
     44     return adoptRefWillBeRefCountedGarbageCollected(new InbandTextTrack(document, webTrack));
     45 }
     46 
     47 InbandTextTrack::InbandTextTrack(Document& document, WebInbandTextTrack* webTrack)
     48     : TextTrack(document, emptyAtom, webTrack->label(), webTrack->language(), webTrack->id(), InBand)
     49     , m_webTrack(webTrack)
     50 {
     51     m_webTrack->setClient(this);
     52 
     53     switch (m_webTrack->kind()) {
     54     case WebInbandTextTrack::KindSubtitles:
     55         setKind(TextTrack::subtitlesKeyword());
     56         break;
     57     case WebInbandTextTrack::KindCaptions:
     58         setKind(TextTrack::captionsKeyword());
     59         break;
     60     case WebInbandTextTrack::KindDescriptions:
     61         setKind(TextTrack::descriptionsKeyword());
     62         break;
     63     case WebInbandTextTrack::KindChapters:
     64         setKind(TextTrack::chaptersKeyword());
     65         break;
     66     case WebInbandTextTrack::KindMetadata:
     67         setKind(TextTrack::metadataKeyword());
     68         break;
     69     case WebInbandTextTrack::KindNone:
     70     default:
     71         ASSERT_NOT_REACHED();
     72         break;
     73     }
     74 }
     75 
     76 InbandTextTrack::~InbandTextTrack()
     77 {
     78 #if ENABLE(OILPAN)
     79     if (m_webTrack)
     80         m_webTrack->setClient(0);
     81 #else
     82     // Make sure m_webTrack was cleared by trackRemoved() before destruction.
     83     ASSERT(!m_webTrack);
     84 #endif
     85 }
     86 
     87 size_t InbandTextTrack::inbandTrackIndex()
     88 {
     89     ASSERT(m_webTrack);
     90     return m_webTrack->textTrackIndex();
     91 }
     92 
     93 void InbandTextTrack::setTrackList(TextTrackList* trackList)
     94 {
     95     TextTrack::setTrackList(trackList);
     96     if (trackList)
     97         return;
     98 
     99     ASSERT(m_webTrack);
    100     m_webTrack->setClient(0);
    101     m_webTrack = 0;
    102 }
    103 
    104 void InbandTextTrack::addWebVTTCue(double start, double end, const WebString& id, const WebString& content, const WebString& settings)
    105 {
    106     HTMLMediaElement* owner = mediaElement();
    107     ASSERT(owner);
    108     RefPtrWillBeRawPtr<VTTCue> cue = VTTCue::create(owner->document(), start, end, content);
    109     cue->setId(id);
    110     cue->parseSettings(settings);
    111     addCue(cue);
    112 }
    113 
    114 } // namespace WebCore
    115