1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(VIDEO_TRACK)
#include "JSTextTrackCue.h"
#include "JSDataCue.h"
#include "JSTrackCustom.h"
#include "JSVTTCue.h"
#include "TextTrack.h"
using namespace JSC;
namespace WebCore {
bool JSTextTrackCueOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, SlotVisitor& visitor)
{
JSTextTrackCue* jsTextTrackCue = jsCast<JSTextTrackCue*>(handle.slot()->asCell());
TextTrackCue& textTrackCue = jsTextTrackCue->wrapped();
// If the cue is firing event listeners, its wrapper is reachable because
// the wrapper is responsible for marking those event listeners.
if (textTrackCue.isFiringEventListeners())
return true;
// If the cue has no event listeners and has no custom properties, it is not reachable.
if (!textTrackCue.hasEventListeners() && !jsTextTrackCue->hasCustomProperties())
return false;
// If the cue is not associated with a track, it is not reachable.
if (!textTrackCue.track())
return false;
return visitor.containsOpaqueRoot(root(textTrackCue.track()));
}
JSValue toJS(ExecState*, JSDOMGlobalObject* globalObject, TextTrackCue* cue)
{
if (!cue)
return jsNull();
JSObject* wrapper = getCachedWrapper(globalObject->world(), cue);
if (wrapper)
return wrapper;
// This switch will make more sense once we support DataCue
switch (cue->cueType()) {
case TextTrackCue::Data:
return CREATE_DOM_WRAPPER(globalObject, DataCue, cue);
case TextTrackCue::WebVTT:
case TextTrackCue::Generic:
return CREATE_DOM_WRAPPER(globalObject, VTTCue, cue);
default:
ASSERT_NOT_REACHED();
return jsNull();
}
}
void JSTextTrackCue::visitAdditionalChildren(SlotVisitor& visitor)
{
if (TextTrack* textTrack = wrapped().track())
visitor.addOpaqueRoot(root(textTrack));
}
} // namespace WebCore
#endif
|
