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();
}
}
static Element* elementFromCenter(Element& element)
{
ClientRect* clientRect = element.getBoundingClientRect();
int centerX = static_cast<int>((clientRect->left() + clientRect->right()) / 2);
int centerY = static_cast<int>((clientRect->top() + clientRect->bottom()) / 2);
return element.document().elementFromPoint(centerX , centerY);
}
JSValue jsClientRectBottom(ExecState* exec, JSValue slotBase, const Identifier&)
{
JSClientRect* castedThis = static_cast<JSClientRect*>(asObject(slotBase));
UNUSED_PARAM(exec);
ClientRect* imp = static_cast<ClientRect*>(castedThis->impl());
JSValue result = jsNumber(exec, imp->bottom());
return result;
}
static v8::Handle<v8::Value> bottomAttrGetter(v8::Local<v8::String> name, const v8::AccessorInfo& info)
{
INC_STATS("DOM.ClientRect.bottom._get");
ClientRect* imp = V8ClientRect::toNative(info.Holder());
return v8::Number::New(imp->bottom());
}
