bool HTMLAnchorElement::isKeyboardFocusable(KeyboardEvent* event) const
{
if (!isLink())
return HTMLElement::isKeyboardFocusable(event);
if (!isFocusable())
return false;
if (!document()->frame())
return false;
if (!document()->frame()->eventHandler()->tabsToLinks(event))
return false;
if (!renderer() || !renderer()->isBoxModelObject())
return false;
// Before calling absoluteRects, check for the common case where the renderer
// is non-empty, since this is a faster check and almost always returns true.
RenderBoxModelObject* box = toRenderBoxModelObject(renderer());
if (!box->borderBoundingBox().isEmpty())
return true;
Vector<IntRect> rects;
FloatPoint absPos = renderer()->localToAbsolute();
renderer()->absoluteRects(rects, absPos.x(), absPos.y());
size_t n = rects.size();
for (size_t i = 0; i < n; ++i)
if (!rects[i].isEmpty())
return true;
return false;
}
