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<?php
namespace Drupal\Core\Render\Element;
use Drupal\Core\Form\FormStateInterface;
/**
* Provides a form element for input of multiple-line text.
*
* Properties:
* - #rows: Number of rows in the text box.
* - #cols: Number of columns in the text box.
* - #resizable: Controls whether the text area is resizable. Allowed values
* are "none", "vertical", "horizontal", or "both" (defaults to "vertical").
*
* Usage example:
* @code
* $form['text'] = array(
* '#type' => 'textarea',
* '#title' => $this->t('Text'),
* );
* @endcode
*
* @see \Drupal\Core\Render\Element\Textfield
* @see \Drupal\filter\Element\TextFormat
*
* @FormElement("textarea")
*/
class Textarea extends FormElement {
/**
* {@inheritdoc}
*/
public function getInfo() {
$class = get_class($this);
return [
'#input' => TRUE,
'#cols' => 60,
'#rows' => 5,
'#resizable' => 'vertical',
'#process' => [
[$class, 'processAjaxForm'],
[$class, 'processGroup'],
],
'#pre_render' => [
[$class, 'preRenderGroup'],
],
'#theme' => 'textarea',
'#theme_wrappers' => ['form_element'],
];
}
/**
* {@inheritdoc}
*/
public static function valueCallback(&$element, $input, FormStateInterface $form_state) {
if ($input !== FALSE && $input !== NULL) {
// This should be a string, but allow other scalars since they might be
// valid input in programmatic form submissions.
return is_scalar($input) ? (string) $input : '';
}
return NULL;
}
}