third_party/WebKit/Source/core/html/track/LoadableTextTrack.cpp

   1 /*
   2  * Copyright (C) 2011 Google 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/LoadableTextTrack.h"
  28
  29 #include "core/dom/ElementTraversal.h"
  30 #include "core/html/HTMLTrackElement.h"
  31 #include "core/html/track/vtt/VTTRegionList.h"
  32
  33 namespace blink {
  34
  35 LoadableTextTrack::LoadableTextTrack(HTMLTrackElement* track)
  36     : TextTrack(emptyAtom, emptyAtom, emptyAtom, emptyAtom, TrackElement)
  37     , m_trackElement(track)
  38 {
  39 }
  40
  41 LoadableTextTrack::~LoadableTextTrack()
  42 {
  43 #if !ENABLE(OILPAN)
  44     ASSERT(!m_trackElement);
  45 #endif
  46 }
  47
  48 #if !ENABLE(OILPAN)
  49 void LoadableTextTrack::clearTrackElement()
  50 {
  51     m_trackElement = nullptr;
  52 }
  53 #endif
  54
  55 bool LoadableTextTrack::isDefault() const
  56 {
  57     ASSERT(m_trackElement);
  58     return m_trackElement->fastHasAttribute(HTMLNames::defaultAttr);
  59 }
  60
  61 void LoadableTextTrack::setMode(const AtomicString& mode)
  62 {
  63     TextTrack::setMode(mode);
  64 #if !ENABLE(OILPAN)
  65     if (!m_trackElement)
  66         return;
  67 #endif
  68
  69     if (m_trackElement->readyState() == HTMLTrackElement::NONE)
  70         m_trackElement->scheduleLoad();
  71 }
  72
  73 void LoadableTextTrack::addRegions(const HeapVector<Member<VTTRegion>>& newRegions)
  74 {
  75     for (size_t i = 0; i < newRegions.size(); ++i) {
  76         newRegions[i]->setTrack(this);
  77         regions()->add(newRegions[i]);
  78     }
  79 }
  80
  81 size_t LoadableTextTrack::trackElementIndex()
  82 {
  83     ASSERT(m_trackElement);
  84     ASSERT(m_trackElement->parentNode());
  85
  86     size_t index = 0;
  87     for (HTMLTrackElement* track = Traversal<HTMLTrackElement>::firstChild(*m_trackElement->parentNode()); track; track = Traversal<HTMLTrackElement>::nextSibling(*track)) {
  88         if (!track->parentNode())
  89             continue;
  90         if (track == m_trackElement)
  91             return index;
  92         ++index;
  93     }
  94     ASSERT_NOT_REACHED();
  95
  96     return 0;
  97 }
  98
  99 DEFINE_TRACE(LoadableTextTrack)
 100 {
 101     visitor->trace(m_trackElement);
 102     TextTrack::trace(visitor);
 103 }
 104
 105 } // namespace blink