void JSTextTrackCue::visitChildren(JSCell* cell, SlotVisitor& visitor)
{
JSTextTrackCue* jsTextTrackCue = jsCast<JSTextTrackCue*>(cell);
ASSERT_GC_OBJECT_INHERITS(jsTextTrackCue, &s_info);
COMPILE_ASSERT(StructureFlags & OverridesVisitChildren, OverridesVisitChildrenWithoutSettingFlag);
ASSERT(jsTextTrackCue->structure()->typeInfo().overridesVisitChildren());
Base::visitChildren(jsTextTrackCue, visitor);
// Mark the cue's track root if it has one.
TextTrackCue* textTrackCue = static_cast<TextTrackCue*>(jsTextTrackCue->impl());
if (TextTrack* textTrack = textTrackCue->track())
visitor.addOpaqueRoot(root(textTrack));
textTrackCue->visitJSEventListeners(visitor);
}
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 is not associated with a track, it is not reachable.
if (!textTrackCue.track())
return false;
return visitor.containsOpaqueRoot(root(textTrackCue.track()));
}
bool JSTextTrackCueOwner::isReachableFromOpaqueRoots(JSC::Handle<JSC::Unknown> handle, void*, SlotVisitor& visitor)
{
JSTextTrackCue* jsTextTrackCue = jsCast<JSTextTrackCue*>(handle.get().asCell());
TextTrackCue* textTrackCue = static_cast<TextTrackCue*>(jsTextTrackCue->impl());
// 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()));
}
