/**
* Prepend or append to self/child.
*
* @param Element $child
* @param string $name
* @param null $subject
* @param null $position
* @param boolean $before
*
* @return $this
*/
protected function insertChildAtPosition($child, $name = null, $subject = null, $position = null, $before = false)
{
// Get default child name
$subject = $subject ?: $this;
$name = $name ?: count($this->children);
// Bind parent to child
if ($child instanceof TreeObject) {
$child->setParent($subject);
}
// Add object to children
$child->parentIndex = $name;
// If the position is a child name, get its index
$before = $before ? 0 : 1;
$position = is_null($position) ? count($subject->children) : $position;
if (is_string($position)) {
$position = array_search($position, array_keys($subject->children));
}
if (is_string($name) && isset($subject->children[$name])) {
$subject->children[$name] = $child;
return $this;
}
// Slice and recompose children
$subject->children = array_slice($subject->children, 0, $position + $before, true) + array($name => $child) + array_slice($subject->children, $position, count($subject->children), true);
return $this;
}
