1 /* 2 * Copyright (C) 2011 Google Inc. All rights reserved. 3 * Copyright (C) 2011, 2012, 2013 Apple Inc. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * * Redistributions in binary form must reproduce the above 12 * copyright notice, this list of conditions and the following disclaimer 13 * in the documentation and/or other materials provided with the 14 * distribution. 15 * * Neither the name of Google Inc. nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include "config.h" 33 #include "core/html/track/TextTrackCue.h" 34 35 #include "bindings/core/v8/ExceptionMessages.h" 36 #include "bindings/core/v8/ExceptionStatePlaceholder.h" 37 #include "core/events/Event.h" 38 #include "core/html/track/TextTrack.h" 39 #include "core/html/track/TextTrackCueList.h" 40 41 namespace blink { 42 43 static const int invalidCueIndex = -1; 44 45 TextTrackCue::TextTrackCue(double start, double end) 46 : m_startTime(start) 47 , m_endTime(end) 48 , m_cueIndex(invalidCueIndex) 49 , m_track(nullptr) 50 , m_isActive(false) 51 , m_pauseOnExit(false) 52 { 53 } 54 55 void TextTrackCue::cueWillChange() 56 { 57 if (m_track) 58 m_track->cueWillChange(this); 59 } 60 61 void TextTrackCue::cueDidChange() 62 { 63 if (m_track) 64 m_track->cueDidChange(this); 65 } 66 67 TextTrack* TextTrackCue::track() const 68 { 69 return m_track; 70 } 71 72 void TextTrackCue::setTrack(TextTrack* track) 73 { 74 m_track = track; 75 } 76 77 Node* TextTrackCue::owner() const 78 { 79 return m_track ? m_track->owner() : 0; 80 } 81 82 void TextTrackCue::setId(const AtomicString& id) 83 { 84 if (m_id == id) 85 return; 86 87 cueWillChange(); 88 m_id = id; 89 cueDidChange(); 90 } 91 92 void TextTrackCue::setStartTime(double value) 93 { 94 // TODO(93143): Add spec-compliant behavior for negative time values. 95 if (m_startTime == value || value < 0) 96 return; 97 98 cueWillChange(); 99 m_startTime = value; 100 cueDidChange(); 101 } 102 103 void TextTrackCue::setEndTime(double value) 104 { 105 // TODO(93143): Add spec-compliant behavior for negative time values. 106 if (m_endTime == value || value < 0) 107 return; 108 109 cueWillChange(); 110 m_endTime = value; 111 cueDidChange(); 112 } 113 114 void TextTrackCue::setPauseOnExit(bool value) 115 { 116 if (m_pauseOnExit == value) 117 return; 118 119 cueWillChange(); 120 m_pauseOnExit = value; 121 cueDidChange(); 122 } 123 124 int TextTrackCue::cueIndex() 125 { 126 if (m_cueIndex == invalidCueIndex) 127 m_cueIndex = track()->cues()->getCueIndex(this); 128 129 return m_cueIndex; 130 } 131 132 void TextTrackCue::invalidateCueIndex() 133 { 134 m_cueIndex = invalidCueIndex; 135 } 136 137 bool TextTrackCue::dispatchEvent(PassRefPtrWillBeRawPtr<Event> event) 138 { 139 // When a TextTrack's mode is disabled: no cues are active, no events fired. 140 if (!track() || track()->mode() == TextTrack::disabledKeyword()) 141 return false; 142 143 return EventTarget::dispatchEvent(event); 144 } 145 146 bool TextTrackCue::isActive() 147 { 148 return m_isActive && track() && track()->mode() != TextTrack::disabledKeyword(); 149 } 150 151 void TextTrackCue::setIsActive(bool active) 152 { 153 m_isActive = active; 154 155 // Remove the display tree as soon as the cue becomes inactive. 156 if (!active) 157 removeDisplayTree(); 158 } 159 160 const AtomicString& TextTrackCue::interfaceName() const 161 { 162 return EventTargetNames::TextTrackCue; 163 } 164 165 void TextTrackCue::trace(Visitor* visitor) 166 { 167 visitor->trace(m_track); 168 EventTargetWithInlineData::trace(visitor); 169 } 170 171 } // namespace blink 172