/**
* Converts any set description variable into a traversable array.
*
* @param \Drupal\materialize\Utility\Variables $variables
* A variables object.
* @param string $hook
* The name of the theme hook.
* @param array $info
* The theme hook info array.
*
* @see https://www.drupal.org/node/2324025
*/
protected function preprocessDescription(Variables $variables, $hook, array $info)
{
if ($variables->offsetGet('description')) {
// Retrieve the description attributes.
$description_attributes = $variables->offsetGet('description_attributes', []);
// Remove standalone description attributes.
$variables->offsetUnset('description_attributes');
// Build the description attributes.
if ($id = $variables->getAttribute('id')) {
$variables->setAttribute('aria-describedby', "{$id}--description");
$description_attributes['id'] = "{$id}--description";
}
// Replace the description variable.
$variables->offsetSet('description', ['attributes' => new Attribute($description_attributes), 'content' => $variables['description'], 'position' => $variables->offsetGet('description_display', 'after')]);
}
}
