1/* 2 * Copyright (C) 2011, 2013 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 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 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 "LoadableTextTrack.h" 31 32#include "Event.h" 33#include "HTMLTrackElement.h" 34#include "ScriptExecutionContext.h" 35#include "TextTrackCueList.h" 36 37#if ENABLE(WEBVTT_REGIONS) 38#include "VTTRegionList.h" 39#endif 40 41namespace WebCore { 42 43LoadableTextTrack::LoadableTextTrack(HTMLTrackElement* track, const String& kind, const String& label, const String& language) 44 : TextTrack(&track->document(), track, kind, emptyString(), label, language, TrackElement) 45 , m_trackElement(track) 46 , m_loadTimer(this, &LoadableTextTrack::loadTimerFired) 47 , m_isDefault(false) 48{ 49} 50 51LoadableTextTrack::~LoadableTextTrack() 52{ 53} 54 55void LoadableTextTrack::clearClient() 56{ 57 m_trackElement = 0; 58 TextTrack::clearClient(); 59} 60 61void LoadableTextTrack::scheduleLoad(const URL& url) 62{ 63 if (url == m_url) 64 return; 65 66 // 4.8.10.12.3 Sourcing out-of-band text tracks (continued) 67 68 // 2. Let URL be the track URL of the track element. 69 m_url = url; 70 71 // 3. Asynchronously run the remaining steps, while continuing with whatever task 72 // was responsible for creating the text track or changing the text track mode. 73 if (!m_loadTimer.isActive()) 74 m_loadTimer.startOneShot(0); 75} 76 77Element* LoadableTextTrack::element() 78{ 79 return m_trackElement; 80} 81 82void LoadableTextTrack::setTrackElement(HTMLTrackElement* element) 83{ 84 ASSERT(!m_trackElement || m_trackElement == element); 85 m_trackElement = element; 86} 87 88void LoadableTextTrack::loadTimerFired(Timer<LoadableTextTrack>&) 89{ 90 if (m_loader) 91 m_loader->cancelLoad(); 92 93 if (!m_trackElement) 94 return; 95 96 // 4.8.10.12.3 Sourcing out-of-band text tracks (continued) 97 98 // 4. Download: If URL is not the empty string, perform a potentially CORS-enabled fetch of URL, with the 99 // mode being the state of the media element's crossorigin content attribute, the origin being the 100 // origin of the media element's Document, and the default origin behaviour set to fail. 101 m_loader = std::make_unique<TextTrackLoader>(static_cast<TextTrackLoaderClient&>(*this), static_cast<ScriptExecutionContext*>(&m_trackElement->document())); 102 if (!m_loader->load(m_url, m_trackElement->mediaElementCrossOriginAttribute())) 103 m_trackElement->didCompleteLoad(HTMLTrackElement::Failure); 104} 105 106void LoadableTextTrack::newCuesAvailable(TextTrackLoader* loader) 107{ 108 ASSERT_UNUSED(loader, m_loader.get() == loader); 109 110 Vector<RefPtr<TextTrackCue>> newCues; 111 m_loader->getNewCues(newCues); 112 113 if (!m_cues) 114 m_cues = TextTrackCueList::create(); 115 116 for (size_t i = 0; i < newCues.size(); ++i) { 117 newCues[i]->setTrack(this); 118 m_cues->add(newCues[i]); 119 } 120 121 if (client()) 122 client()->textTrackAddCues(this, m_cues.get()); 123} 124 125void LoadableTextTrack::cueLoadingCompleted(TextTrackLoader* loader, bool loadingFailed) 126{ 127 ASSERT_UNUSED(loader, m_loader.get() == loader); 128 129 if (!m_trackElement) 130 return; 131 132 m_trackElement->didCompleteLoad(loadingFailed ? HTMLTrackElement::Failure : HTMLTrackElement::Success); 133} 134 135#if ENABLE(WEBVTT_REGIONS) 136void LoadableTextTrack::newRegionsAvailable(TextTrackLoader* loader) 137{ 138 ASSERT_UNUSED(loader, m_loader.get() == loader); 139 140 Vector<RefPtr<VTTRegion>> newRegions; 141 m_loader->getNewRegions(newRegions); 142 143 for (size_t i = 0; i < newRegions.size(); ++i) { 144 newRegions[i]->setTrack(this); 145 regions()->add(newRegions[i]); 146 } 147} 148#endif 149 150AtomicString LoadableTextTrack::id() const 151{ 152 if (m_trackElement) 153 return m_trackElement->getAttribute("id"); 154 return emptyString(); 155} 156 157size_t LoadableTextTrack::trackElementIndex() 158{ 159 ASSERT(m_trackElement); 160 ASSERT(m_trackElement->parentNode()); 161 162 size_t index = 0; 163 for (Node* node = m_trackElement->parentNode()->firstChild(); node; node = node->nextSibling()) { 164 if (!node->hasTagName(trackTag) || !node->parentNode()) 165 continue; 166 if (node == m_trackElement) 167 return index; 168 ++index; 169 } 170 ASSERT_NOT_REACHED(); 171 172 return 0; 173} 174 175} // namespace WebCore 176 177#endif 178