1/* 2 * Copyright (C) 2011, 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 28#if ENABLE(VIDEO_TRACK) 29 30#include "TextTrackList.h" 31 32#include "EventNames.h" 33#include "HTMLMediaElement.h" 34#include "InbandTextTrack.h" 35#include "InbandTextTrackPrivate.h" 36#include "LoadableTextTrack.h" 37#include "TextTrack.h" 38 39using namespace WebCore; 40 41TextTrackList::TextTrackList(HTMLMediaElement* element, ScriptExecutionContext* context) 42 : TrackListBase(element, context) 43{ 44} 45 46TextTrackList::~TextTrackList() 47{ 48} 49 50unsigned TextTrackList::length() const 51{ 52 return m_addTrackTracks.size() + m_elementTracks.size() + m_inbandTracks.size(); 53} 54 55int TextTrackList::getTrackIndex(TextTrack *textTrack) 56{ 57 if (textTrack->trackType() == TextTrack::TrackElement) 58 return static_cast<LoadableTextTrack*>(textTrack)->trackElementIndex(); 59 60 if (textTrack->trackType() == TextTrack::AddTrack) 61 return m_elementTracks.size() + m_addTrackTracks.find(textTrack); 62 63 if (textTrack->trackType() == TextTrack::InBand) 64 return m_elementTracks.size() + m_addTrackTracks.size() + m_inbandTracks.find(textTrack); 65 66 ASSERT_NOT_REACHED(); 67 68 return -1; 69} 70 71int TextTrackList::getTrackIndexRelativeToRenderedTracks(TextTrack *textTrack) 72{ 73 // Calculate the "Let n be the number of text tracks whose text track mode is showing and that are in the media element's list of text tracks before track." 74 int trackIndex = 0; 75 76 for (size_t i = 0; i < m_elementTracks.size(); ++i) { 77 if (!toTextTrack(m_elementTracks[i].get())->isRendered()) 78 continue; 79 80 if (m_elementTracks[i] == textTrack) 81 return trackIndex; 82 ++trackIndex; 83 } 84 85 for (size_t i = 0; i < m_addTrackTracks.size(); ++i) { 86 if (!toTextTrack(m_addTrackTracks[i].get())->isRendered()) 87 continue; 88 89 if (m_addTrackTracks[i] == textTrack) 90 return trackIndex; 91 ++trackIndex; 92 } 93 94 for (size_t i = 0; i < m_inbandTracks.size(); ++i) { 95 if (!toTextTrack(m_inbandTracks[i].get())->isRendered()) 96 continue; 97 98 if (m_inbandTracks[i] == textTrack) 99 return trackIndex; 100 ++trackIndex; 101 } 102 103 ASSERT_NOT_REACHED(); 104 105 return -1; 106} 107 108TextTrack* TextTrackList::item(unsigned index) 109{ 110 // 4.8.10.12.1 Text track model 111 // The text tracks are sorted as follows: 112 // 1. The text tracks corresponding to track element children of the media element, in tree order. 113 // 2. Any text tracks added using the addTextTrack() method, in the order they were added, oldest first. 114 // 3. Any media-resource-specific text tracks (text tracks corresponding to data in the media 115 // resource), in the order defined by the media resource's format specification. 116 117 if (index < m_elementTracks.size()) 118 return toTextTrack(m_elementTracks[index].get()); 119 120 index -= m_elementTracks.size(); 121 if (index < m_addTrackTracks.size()) 122 return toTextTrack(m_addTrackTracks[index].get()); 123 124 index -= m_addTrackTracks.size(); 125 if (index < m_inbandTracks.size()) 126 return toTextTrack(m_inbandTracks[index].get()); 127 128 return 0; 129} 130 131void TextTrackList::invalidateTrackIndexesAfterTrack(TextTrack* track) 132{ 133 Vector<RefPtr<TrackBase> >* tracks = 0; 134 135 if (track->trackType() == TextTrack::TrackElement) { 136 tracks = &m_elementTracks; 137 for (size_t i = 0; i < m_addTrackTracks.size(); ++i) 138 toTextTrack(m_addTrackTracks[i].get())->invalidateTrackIndex(); 139 for (size_t i = 0; i < m_inbandTracks.size(); ++i) 140 toTextTrack(m_inbandTracks[i].get())->invalidateTrackIndex(); 141 } else if (track->trackType() == TextTrack::AddTrack) { 142 tracks = &m_addTrackTracks; 143 for (size_t i = 0; i < m_inbandTracks.size(); ++i) 144 toTextTrack(m_inbandTracks[i].get())->invalidateTrackIndex(); 145 } else if (track->trackType() == TextTrack::InBand) 146 tracks = &m_inbandTracks; 147 else 148 ASSERT_NOT_REACHED(); 149 150 size_t index = tracks->find(track); 151 if (index == notFound) 152 return; 153 154 for (size_t i = index; i < tracks->size(); ++i) 155 toTextTrack(tracks->at(index).get())->invalidateTrackIndex(); 156} 157 158void TextTrackList::append(PassRefPtr<TextTrack> prpTrack) 159{ 160 RefPtr<TextTrack> track = prpTrack; 161 162 if (track->trackType() == TextTrack::AddTrack) 163 m_addTrackTracks.append(track); 164 else if (track->trackType() == TextTrack::TrackElement) { 165 // Insert tracks added for <track> element in tree order. 166 size_t index = static_cast<LoadableTextTrack*>(track.get())->trackElementIndex(); 167 m_elementTracks.insert(index, track); 168 } else if (track->trackType() == TextTrack::InBand) { 169 // Insert tracks added for in-band in the media file order. 170 size_t index = static_cast<InbandTextTrack*>(track.get())->inbandTrackIndex(); 171 m_inbandTracks.insert(index, track); 172 } else 173 ASSERT_NOT_REACHED(); 174 175 invalidateTrackIndexesAfterTrack(track.get()); 176 177 ASSERT(!track->mediaElement() || track->mediaElement() == mediaElement()); 178 track->setMediaElement(mediaElement()); 179 180 scheduleAddTrackEvent(track.release()); 181} 182 183void TextTrackList::remove(TrackBase* track) 184{ 185 TextTrack* textTrack = toTextTrack(track); 186 Vector<RefPtr<TrackBase> >* tracks = 0; 187 if (textTrack->trackType() == TextTrack::TrackElement) 188 tracks = &m_elementTracks; 189 else if (textTrack->trackType() == TextTrack::AddTrack) 190 tracks = &m_addTrackTracks; 191 else if (textTrack->trackType() == TextTrack::InBand) 192 tracks = &m_inbandTracks; 193 else 194 ASSERT_NOT_REACHED(); 195 196 size_t index = tracks->find(track); 197 if (index == notFound) 198 return; 199 200 invalidateTrackIndexesAfterTrack(textTrack); 201 202 ASSERT(!track->mediaElement() || track->mediaElement() == element()); 203 track->setMediaElement(0); 204 205 RefPtr<TrackBase> trackRef = (*tracks)[index]; 206 tracks->remove(index); 207 scheduleRemoveTrackEvent(trackRef.release()); 208} 209 210bool TextTrackList::contains(TrackBase* track) const 211{ 212 const Vector<RefPtr<TrackBase> >* tracks = 0; 213 TextTrack::TextTrackType type = toTextTrack(track)->trackType(); 214 if (type == TextTrack::TrackElement) 215 tracks = &m_elementTracks; 216 else if (type == TextTrack::AddTrack) 217 tracks = &m_addTrackTracks; 218 else if (type == TextTrack::InBand) 219 tracks = &m_inbandTracks; 220 else 221 ASSERT_NOT_REACHED(); 222 223 return tracks->find(track) != notFound; 224} 225 226const AtomicString& TextTrackList::interfaceName() const 227{ 228 return eventNames().interfaceForTextTrackList; 229} 230 231#endif 232