',
self::render_attributes( $attributes )
);
if ( ! $field['multiple'] && $field['placeholder'] ) {
$output .= '';
}
$output .= $walker->walk( $options, $field['flatten'] ? -1 : 0 );
$output .= '';
$output .= self::get_select_all_html( $field );
return $output;
}
/**
* Normalize parameters for field.
*
* @param array $field Field parameters.
* @return array
*/
public static function normalize( $field ) {
$field = parent::normalize( $field );
$field = $field['multiple'] ? RWMB_Multiple_Values_Field::normalize( $field ) : $field;
$field = wp_parse_args( $field, [
'select_all_none' => false,
] );
return $field;
}
/**
* Get the attributes for a field.
*
* @param array $field Field parameters.
* @param mixed $value Meta value.
*
* @return array
*/
public static function get_attributes( $field, $value = null ) {
$attributes = parent::get_attributes( $field, $value );
$attributes = wp_parse_args( $attributes, [
'multiple' => $field['multiple'],
] );
return $attributes;
}
/**
* Get html for select all|none for multiple select.
*
* @param array $field Field parameters.
* @return string
*/
public static function get_select_all_html( $field ) {
if ( $field['multiple'] && $field['select_all_none'] ) {
return '';
}
return '';
}
}