void VTTRegion::displayLastVTTCueBox()
{
WTF_LOG(Media, "VTTRegion::displayLastVTTCueBox");
ASSERT(m_cueContainer);
// FIXME: This should not be causing recalc styles in a loop to set the "top" css
// property to move elements. We should just scroll the text track cues on the
// compositor with an animation.
if (m_scrollTimer.isActive())
return;
// If it's a scrolling region, add the scrolling class.
if (isScrollingRegion())
m_cueContainer->classList().add(textTrackCueContainerScrollingClass(), ASSERT_NO_EXCEPTION);
float regionBottom = m_regionDisplayTree->getBoundingClientRect()->bottom();
// Find first cue that is not entirely displayed and scroll it upwards.
for (Element* child = ElementTraversal::firstChild(*m_cueContainer); child && !m_scrollTimer.isActive(); child = ElementTraversal::nextSibling(*child)) {
ClientRect* clientRect = child->getBoundingClientRect();
float childTop = clientRect->top();
float childBottom = clientRect->bottom();
if (regionBottom >= childBottom)
continue;
float height = childBottom - childTop;
m_currentTop -= std::min(height, childBottom - regionBottom);
m_cueContainer->setInlineStyleProperty(CSSPropertyTop, m_currentTop, CSSPrimitiveValue::UnitType::Pixels);
startTimer();
}
}
void TextTrackRegion::displayLastTextTrackCueBox()
{
LOG(Media, "TextTrackRegion::displayLastTextTrackCueBox");
ASSERT(m_cueContainer);
// The container needs to be rendered, if it is not empty and the region is not currently scrolling.
if (!m_cueContainer->renderer() || !m_cueContainer->childNodeCount() || m_scrollTimer.isActive())
return;
// If it's a scrolling region, add the scrolling class.
if (isScrollingRegion())
m_cueContainer->classList()->add(textTrackCueContainerScrollingClass(), IGNORE_EXCEPTION);
float regionBottom = m_regionDisplayTree->getBoundingClientRect()->bottom();
// Find first cue that is not entirely displayed and scroll it upwards.
for (int i = 0; i < m_cueContainer->childNodeCount() && !m_scrollTimer.isActive(); ++i) {
float childTop = static_cast<HTMLDivElement*>(m_cueContainer->childNode(i))->getBoundingClientRect()->top();
float childBottom = static_cast<HTMLDivElement*>(m_cueContainer->childNode(i))->getBoundingClientRect()->bottom();
if (regionBottom >= childBottom)
continue;
float height = childBottom - childTop;
m_currentTop -= std::min(height, childBottom - regionBottom);
m_cueContainer->setInlineStyleProperty(CSSPropertyTop, m_currentTop, CSSPrimitiveValue::CSS_PX);
startTimer();
}
}
void VTTRegion::displayLastTextTrackCueBox()
{
ASSERT(m_cueContainer);
// The container needs to be rendered, if it is not empty and the region is not currently scrolling.
if (!m_cueContainer->renderer() || !m_cueContainer->hasChildNodes() || m_scrollTimer.isActive())
return;
// If it's a scrolling region, add the scrolling class.
if (isScrollingRegion())
m_cueContainer->classList().add(textTrackCueContainerScrollingClass(), IGNORE_EXCEPTION);
float regionBottom = m_regionDisplayTree->getBoundingClientRect()->bottom();
// Find first cue that is not entirely displayed and scroll it upwards.
for (auto& child : childrenOfType<Element>(*m_cueContainer)) {
Ref<ClientRect> rect = child.getBoundingClientRect();
float childTop = rect->top();
float childBottom = rect->bottom();
if (regionBottom >= childBottom)
continue;
float height = childBottom - childTop;
m_currentTop -= std::min(height, childBottom - regionBottom);
m_cueContainer->setInlineStyleProperty(CSSPropertyTop, m_currentTop, CSSPrimitiveValue::CSS_PX);
startTimer();
break;
}
}
void VTTRegion::startTimer()
{
WTF_LOG(Media, "VTTRegion::startTimer");
if (m_scrollTimer.isActive())
return;
double duration = isScrollingRegion() ? scrollTime : 0;
m_scrollTimer.startOneShot(duration, FROM_HERE);
}
void TextTrackRegion::startTimer()
{
LOG(Media, "TextTrackRegion::startTimer");
if (m_scrollTimer.isActive())
return;
double duration = isScrollingRegion() ? scrollTime : 0;
m_scrollTimer.startOneShot(duration);
}
