protected function context()
{
$el = $this->document->dom->documentElement;
if ($el === null) {
// Whether there is not a root node
// the DOMDocument is promoted as root node.
$el = $this->document->dom;
}
if ($this->context === null || $el !== $this->contextEl) {
// The user can prepend a root node to the current root node.
// In this case we have to update the context with the new first root node.
$this->context = new FluidContext($this->document, $this->handler, $el);
$this->contextEl = $el;
}
return $this->context;
}