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 28 #include "core/html/track/LoadableTextTrack.h" 29 30 #include "core/html/HTMLTrackElement.h" 31 #include "core/html/track/TextTrackCueList.h" 32 #include "core/html/track/TextTrackRegionList.h" 33 34 namespace WebCore { 35 36 LoadableTextTrack::LoadableTextTrack(HTMLTrackElement* track, const String& kind, const String& label, const String& language) 37 : TextTrack(track->document(), track, kind, label, language, TrackElement) 38 , m_trackElement(track) 39 , m_loadTimer(this, &LoadableTextTrack::loadTimerFired) 40 , m_isDefault(false) 41 { 42 } 43 44 LoadableTextTrack::~LoadableTextTrack() 45 { 46 } 47 48 void LoadableTextTrack::clearClient() 49 { 50 m_trackElement = 0; 51 TextTrack::clearClient(); 52 } 53 54 void LoadableTextTrack::scheduleLoad(const KURL& url) 55 { 56 if (url == m_url) { 57 // If loading of the resource from this URL is in progress, return early. 58 ASSERT(m_loader && m_trackElement); 59 if (m_loader->loadState() < TextTrackLoader::Finished) 60 return; 61 62 // The track element might have changed its state to HTMLTrackElement::Loading 63 // waiting for a call to didCompleteLoad to continue. 64 cueLoadingCompleted(m_loader.get(), m_loader->loadState() == TextTrackLoader::Failed); 65 return; 66 } 67 68 // 4.8.10.12.3 Sourcing out-of-band text tracks (continued) 69 70 // 2. Let URL be the track URL of the track element. 71 m_url = url; 72 73 // 3. Asynchronously run the remaining steps, while continuing with whatever task 74 // was responsible for creating the text track or changing the text track mode. 75 if (!m_loadTimer.isActive()) 76 m_loadTimer.startOneShot(0); 77 } 78 79 void LoadableTextTrack::loadTimerFired(Timer<LoadableTextTrack>*) 80 { 81 if (m_loader) 82 m_loader->cancelLoad(); 83 84 if (!m_trackElement) 85 return; 86 87 // 4.8.10.12.3 Sourcing out-of-band text tracks (continued) 88 89 // 4. Download: If URL is not the empty string, perform a potentially CORS-enabled fetch of URL, with the 90 // mode being the state of the media element's crossorigin content attribute, the origin being the 91 // origin of the media element's Document, and the default origin behaviour set to fail. 92 m_loader = TextTrackLoader::create(this, static_cast<ScriptExecutionContext*>(m_trackElement->document())); 93 if (!m_loader->load(m_url, m_trackElement->mediaElementCrossOriginAttribute())) 94 m_trackElement->didCompleteLoad(this, HTMLTrackElement::Failure); 95 } 96 97 void LoadableTextTrack::newCuesAvailable(TextTrackLoader* loader) 98 { 99 ASSERT_UNUSED(loader, m_loader == loader); 100 101 Vector<RefPtr<TextTrackCue> > newCues; 102 m_loader->getNewCues(newCues); 103 104 if (!m_cues) 105 m_cues = TextTrackCueList::create(); 106 107 for (size_t i = 0; i < newCues.size(); ++i) { 108 newCues[i]->setTrack(this); 109 m_cues->add(newCues[i]); 110 } 111 112 if (client()) 113 client()->textTrackAddCues(this, m_cues.get()); 114 } 115 116 void LoadableTextTrack::cueLoadingStarted(TextTrackLoader* loader) 117 { 118 ASSERT_UNUSED(loader, m_loader == loader); 119 } 120 121 void LoadableTextTrack::cueLoadingCompleted(TextTrackLoader* loader, bool loadingFailed) 122 { 123 ASSERT_UNUSED(loader, m_loader == loader); 124 125 if (!m_trackElement) 126 return; 127 128 m_trackElement->didCompleteLoad(this, loadingFailed ? HTMLTrackElement::Failure : HTMLTrackElement::Success); 129 } 130 131 #if ENABLE(WEBVTT_REGIONS) 132 void LoadableTextTrack::newRegionsAvailable(TextTrackLoader* loader) 133 { 134 ASSERT_UNUSED(loader, m_loader == loader); 135 136 Vector<RefPtr<TextTrackRegion> > newRegions; 137 m_loader->getNewRegions(newRegions); 138 139 for (size_t i = 0; i < newRegions.size(); ++i) { 140 newRegions[i]->setTrack(this); 141 regionList()->add(newRegions[i]); 142 } 143 } 144 #endif 145 146 size_t LoadableTextTrack::trackElementIndex() 147 { 148 ASSERT(m_trackElement); 149 ASSERT(m_trackElement->parentNode()); 150 151 size_t index = 0; 152 for (Node* node = m_trackElement->parentNode()->firstChild(); node; node = node->nextSibling()) { 153 if (!node->hasTagName(trackTag) || !node->parentNode()) 154 continue; 155 if (node == m_trackElement) 156 return index; 157 ++index; 158 } 159 ASSERT_NOT_REACHED(); 160 161 return 0; 162 } 163 164 } // namespace WebCore 165 166
