/**
* @param string|array|Set $name
* @param null|string|bool $value
*
* @return $this|Element|Tag|Field|Attr
*/
public function attr($name, $value = null)
{
if ($name instanceof Attr) {
$this->setAttributeNode($name);
if (Document::ID_ATTR === $name->name) {
$this->setIdAttributeNode($name, true);
}
return $this;
}
if ($name instanceof Set) {
foreach ($name as $a) {
/** @var $a Attr */
$this->setAttributeNode($a);
if (Document::ID_ATTR === $a->name) {
$this->setIdAttributeNode($a, true);
}
}
return $this;
}
if (!is_null($value)) {
if (false === $value) {
$this->removeAttribute($name);
} else {
if (true === $value) {
$this->setAttribute($name, $name);
} else {
$this->setAttribute($name, (string) $value);
if (Document::ID_ATTR === $name) {
$this->setIdAttribute($name, true);
}
}
}
return $this;
}
if (is_array($name)) {
foreach ($name as $attr => $val) {
$this->attr($attr, $val);
}
return $this;
}
$attr = $this->getAttributeNode($name);
if (!$attr) {
$attr = $this->ownerDocument->createAttr($name);
}
return $attr;
}
