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/v8/ExceptionMessages.h"
36 #include "bindings/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 WebCore {
42
43 static const int invalidCueIndex = -1;
44
isInfiniteOrNonNumber(double value,ExceptionState & exceptionState)45 bool TextTrackCue::isInfiniteOrNonNumber(double value, ExceptionState& exceptionState)
46 {
47 if (!std::isfinite(value)) {
48 exceptionState.throwTypeError(ExceptionMessages::notAFiniteNumber(value));
49 return true;
50 }
51 return false;
52 }
53
TextTrackCue(double start,double end)54 TextTrackCue::TextTrackCue(double start, double end)
55 : m_startTime(start)
56 , m_endTime(end)
57 , m_cueIndex(invalidCueIndex)
58 , m_track(0)
59 , m_isActive(false)
60 , m_pauseOnExit(false)
61 {
62 }
63
cueWillChange()64 void TextTrackCue::cueWillChange()
65 {
66 if (m_track)
67 m_track->cueWillChange(this);
68 }
69
cueDidChange()70 void TextTrackCue::cueDidChange()
71 {
72 if (m_track)
73 m_track->cueDidChange(this);
74 }
75
track() const76 TextTrack* TextTrackCue::track() const
77 {
78 return m_track;
79 }
80
setTrack(TextTrack * track)81 void TextTrackCue::setTrack(TextTrack* track)
82 {
83 m_track = track;
84 }
85
setId(const String & id)86 void TextTrackCue::setId(const String& id)
87 {
88 if (m_id == id)
89 return;
90
91 cueWillChange();
92 m_id = id;
93 cueDidChange();
94 }
95
setStartTime(double value,ExceptionState & exceptionState)96 void TextTrackCue::setStartTime(double value, ExceptionState& exceptionState)
97 {
98 // NaN, Infinity and -Infinity values should trigger a TypeError.
99 if (isInfiniteOrNonNumber(value, exceptionState))
100 return;
101
102 // TODO(93143): Add spec-compliant behavior for negative time values.
103 if (m_startTime == value || value < 0)
104 return;
105
106 cueWillChange();
107 m_startTime = value;
108 cueDidChange();
109 }
110
setEndTime(double value,ExceptionState & exceptionState)111 void TextTrackCue::setEndTime(double value, ExceptionState& exceptionState)
112 {
113 // NaN, Infinity and -Infinity values should trigger a TypeError.
114 if (isInfiniteOrNonNumber(value, exceptionState))
115 return;
116
117 // TODO(93143): Add spec-compliant behavior for negative time values.
118 if (m_endTime == value || value < 0)
119 return;
120
121 cueWillChange();
122 m_endTime = value;
123 cueDidChange();
124 }
125
setPauseOnExit(bool value)126 void TextTrackCue::setPauseOnExit(bool value)
127 {
128 if (m_pauseOnExit == value)
129 return;
130
131 cueWillChange();
132 m_pauseOnExit = value;
133 cueDidChange();
134 }
135
cueIndex()136 int TextTrackCue::cueIndex()
137 {
138 if (m_cueIndex == invalidCueIndex)
139 m_cueIndex = track()->cues()->getCueIndex(this);
140
141 return m_cueIndex;
142 }
143
invalidateCueIndex()144 void TextTrackCue::invalidateCueIndex()
145 {
146 m_cueIndex = invalidCueIndex;
147 }
148
dispatchEvent(PassRefPtr<Event> event)149 bool TextTrackCue::dispatchEvent(PassRefPtr<Event> event)
150 {
151 // When a TextTrack's mode is disabled: no cues are active, no events fired.
152 if (!track() || track()->mode() == TextTrack::disabledKeyword())
153 return false;
154
155 return EventTarget::dispatchEvent(event);
156 }
157
isActive()158 bool TextTrackCue::isActive()
159 {
160 return m_isActive && track() && track()->mode() != TextTrack::disabledKeyword();
161 }
162
setIsActive(bool active)163 void TextTrackCue::setIsActive(bool active)
164 {
165 m_isActive = active;
166
167 // Remove the display tree as soon as the cue becomes inactive.
168 if (!active)
169 removeDisplayTree();
170 }
171
interfaceName() const172 const AtomicString& TextTrackCue::interfaceName() const
173 {
174 return EventTargetNames::TextTrackCue;
175 }
176
177 } // namespace WebCore
178