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
TextTrackCue(double start,double end)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
cueWillChange()55 void TextTrackCue::cueWillChange()
56 {
57 if (m_track)
58 m_track->cueWillChange(this);
59 }
60
cueDidChange()61 void TextTrackCue::cueDidChange()
62 {
63 if (m_track)
64 m_track->cueDidChange(this);
65 }
66
track() const67 TextTrack* TextTrackCue::track() const
68 {
69 return m_track;
70 }
71
setTrack(TextTrack * track)72 void TextTrackCue::setTrack(TextTrack* track)
73 {
74 m_track = track;
75 }
76
owner() const77 Node* TextTrackCue::owner() const
78 {
79 return m_track ? m_track->owner() : 0;
80 }
81
setId(const AtomicString & id)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
setStartTime(double value)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
setEndTime(double value)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
setPauseOnExit(bool value)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
cueIndex()124 int TextTrackCue::cueIndex()
125 {
126 if (m_cueIndex == invalidCueIndex)
127 m_cueIndex = track()->cues()->getCueIndex(this);
128
129 return m_cueIndex;
130 }
131
invalidateCueIndex()132 void TextTrackCue::invalidateCueIndex()
133 {
134 m_cueIndex = invalidCueIndex;
135 }
136
dispatchEvent(PassRefPtrWillBeRawPtr<Event> event)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
isActive()146 bool TextTrackCue::isActive()
147 {
148 return m_isActive && track() && track()->mode() != TextTrack::disabledKeyword();
149 }
150
setIsActive(bool active)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
interfaceName() const160 const AtomicString& TextTrackCue::interfaceName() const
161 {
162 return EventTargetNames::TextTrackCue;
163 }
164
trace(Visitor * visitor)165 void TextTrackCue::trace(Visitor* visitor)
166 {
167 visitor->trace(m_track);
168 EventTargetWithInlineData::trace(visitor);
169 }
170
171 } // namespace blink
172