bool TextTrackCue::operator==(const TextTrackCue& cue) const
{
if (cueType() != cue.cueType())
return false;
if (m_endTime != cue.endTime())
return false;
if (m_startTime != cue.startTime())
return false;
if (m_content != cue.text())
return false;
if (m_settings != cue.cueSettings())
return false;
if (m_id != cue.id())
return false;
if (m_textPosition != cue.position())
return false;
if (m_linePosition != cue.line())
return false;
if (m_cueSize != cue.size())
return false;
if (align() != cue.align())
return false;
return true;
}
bool TextTrackCue::isEqual(const TextTrackCue& cue, CueMatchRules match) const
{
if (cueType() != cue.cueType())
return false;
if (match != IgnoreDuration && m_endTime != cue.endTime())
return false;
if (m_startTime != cue.startTime())
return false;
if (m_content != cue.text())
return false;
if (m_settings != cue.cueSettings())
return false;
if (m_id != cue.id())
return false;
if (m_textPosition != cue.position())
return false;
if (m_linePosition != cue.line())
return false;
if (m_cueSize != cue.size())
return false;
if (align() != cue.align())
return false;
return true;
}
void MediaControlRootElement::updateTextTrackDisplay()
{
if (!m_textDisplayContainer)
createTextTrackDisplay();
CueList activeCues = toParentMediaElement(m_textDisplayContainer)->currentlyActiveCues();
m_textTrackDisplay->removeChildren();
bool nothingToDisplay = true;
for (size_t i = 0; i < activeCues.size(); ++i) {
TextTrackCue* cue = activeCues[i].data();
ASSERT(cue->isActive());
if (!cue->track() || cue->track()->mode() != TextTrack::SHOWING)
continue;
String cueText = cue->text();
if (!cueText.isEmpty()) {
if (!nothingToDisplay)
m_textTrackDisplay->appendChild(document()->createElement(HTMLNames::brTag, false), ASSERT_NO_EXCEPTION);
m_textTrackDisplay->appendChild(document()->createTextNode(cueText), ASSERT_NO_EXCEPTION);
nothingToDisplay = false;
}
}
if (!nothingToDisplay)
m_textDisplayContainer->show();
else
m_textDisplayContainer->hide();
}
void MediaControlTextTrackContainerElement::updateDisplay()
{
if (!mediaController()->closedCaptionsVisible())
removeChildren();
HTMLMediaElement* mediaElement = parentMediaElement(this);
// 1. If the media element is an audio element, or is another playback
// mechanism with no rendering area, abort these steps. There is nothing to
// render.
if (!mediaElement || !mediaElement->isVideo())
return;
// 2. Let video be the media element or other playback mechanism.
HTMLVideoElement* video = toHTMLVideoElement(mediaElement);
// 3. Let output be an empty list of absolutely positioned CSS block boxes.
Vector<RefPtr<HTMLDivElement>> output;
// 4. If the user agent is exposing a user interface for video, add to
// output one or more completely transparent positioned CSS block boxes that
// cover the same region as the user interface.
// 5. If the last time these rules were run, the user agent was not exposing
// a user interface for video, but now it is, let reset be true. Otherwise,
// let reset be false.
// There is nothing to be done explicitly for 4th and 5th steps, as
// everything is handled through CSS. The caption box is on top of the
// controls box, in a container set with the -webkit-box display property.
// 6. Let tracks be the subset of video's list of text tracks that have as
// their rules for updating the text track rendering these rules for
// updating the display of WebVTT text tracks, and whose text track mode is
// showing or showing by default.
// 7. Let cues be an empty list of text track cues.
// 8. For each track track in tracks, append to cues all the cues from
// track's list of cues that have their text track cue active flag set.
CueList activeCues = video->currentlyActiveCues();
// 9. If reset is false, then, for each text track cue cue in cues: if cue's
// text track cue display state has a set of CSS boxes, then add those boxes
// to output, and remove cue from cues.
// There is nothing explicitly to be done here, as all the caching occurs
// within the TextTrackCue instance itself. If parameters of the cue change,
// the display tree is cleared.
// 10. For each text track cue cue in cues that has not yet had
// corresponding CSS boxes added to output, in text track cue order, run the
// following substeps:
for (size_t i = 0; i < activeCues.size(); ++i) {
TextTrackCue* cue = activeCues[i].data();
ASSERT(cue->isActive());
if (!cue->track() || !cue->track()->isRendered() || !cue->isActive() || cue->text().isEmpty())
continue;
RefPtr<TextTrackCueBox> displayBox = cue->getDisplayTree(m_videoDisplaySize.size());
if (displayBox->hasChildNodes() && !contains(displayBox.get())) {
// Note: the display tree of a cue is removed when the active flag of the cue is unset.
appendChild(displayBox, ASSERT_NO_EXCEPTION, AttachNow);
cue->setFontSize(m_fontSize, m_videoDisplaySize.size(), m_fontSizeIsImportant);
}
}
// 11. Return output.
if (hasChildNodes()) {
show();
if (mediaElement->requiresTextTrackRepresentation()) {
if (!m_textTrackRepresentation)
m_textTrackRepresentation = TextTrackRepresentation::create(this);
mediaElement->setTextTrackRepresentation(m_textTrackRepresentation.get());
if (Page* page = document().page())
m_textTrackRepresentation->setContentScale(page->deviceScaleFactor());
m_textTrackRepresentation->update();
setInlineStyleProperty(CSSPropertyWidth, m_videoDisplaySize.size().width(), CSSPrimitiveValue::CSS_PX);
setInlineStyleProperty(CSSPropertyHeight, m_videoDisplaySize.size().height(), CSSPrimitiveValue::CSS_PX);
}
} else {
hide();
clearTextTrackRepresentation();
}
}