void RenderListBox::autoscroll()
{
IntPoint pos = document()->frame()->view()->windowToContents(document()->frame()->eventHandler()->currentMousePosition());
int rx = 0;
int ry = 0;
absolutePosition(rx, ry);
int offsetX = pos.x() - rx;
int offsetY = pos.y() - ry;
int endIndex = -1;
int rows = numVisibleItems();
int offset = m_indexOffset;
if (offsetY < borderTop() + paddingTop() && scrollToRevealElementAtListIndex(offset - 1))
endIndex = offset - 1;
else if (offsetY > height() - paddingBottom() - borderBottom() && scrollToRevealElementAtListIndex(offset + rows))
endIndex = offset + rows - 1;
else
endIndex = listIndexAtOffset(offsetX, offsetY);
if (endIndex >= 0) {
HTMLSelectElement* select = static_cast<HTMLSelectElement*>(node());
m_inAutoscroll = true;
if (!select->multiple())
select->setActiveSelectionAnchorIndex(endIndex);
select->setActiveSelectionEndIndex(endIndex);
select->updateListBoxSelection(!select->multiple());
m_inAutoscroll = false;
}
}
void RenderListBox::autoscroll()
{
IntPoint pos = frame()->view()->windowToContents(frame()->eventHandler()->currentMousePosition());
int endIndex = scrollToward(pos);
if (endIndex >= 0) {
HTMLSelectElement* select = toHTMLSelectElement(node());
m_inAutoscroll = true;
if (!select->multiple())
select->setActiveSelectionAnchorIndex(endIndex);
select->setActiveSelectionEndIndex(endIndex);
select->updateListBoxSelection(!select->multiple());
m_inAutoscroll = false;
}
}