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<?php
namespace Drupal\language\Form;
use Drupal\Component\Utility\Html;
use Drupal\Core\Entity\EntityForm;
use Drupal\Core\Form\FormStateInterface;
use Drupal\Core\Language\LanguageInterface;
use Drupal\language\ConfigurableLanguageManagerInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;
/**
* Base form for language add and edit forms.
*/
abstract class LanguageFormBase extends EntityForm {
/**
* The configurable language manager.
*
* @var \Drupal\language\ConfigurableLanguageManagerInterface
*/
protected $languageManager;
/**
* Constructs a ContentEntityForm object.
*
* @param \Drupal\language\ConfigurableLanguageManagerInterface $language_manager
* The configurable language manager.
*/
public function __construct(ConfigurableLanguageManagerInterface $language_manager) {
$this->languageManager = $language_manager;
}
/**
* {@inheritdoc}
*/
public static function create(ContainerInterface $container) {
return new static(
$container->get('language_manager')
);
}
/**
* Common elements of the language addition and editing form.
*/
public function commonForm(array &$form) {
/* @var $language \Drupal\language\ConfigurableLanguageInterface */
$language = $this->entity;
if ($language->getId()) {
$form['langcode_view'] = [
'#type' => 'item',
'#title' => $this->t('Language code'),
'#markup' => $language->id()
];
$form['langcode'] = [
'#type' => 'value',
'#value' => $language->id()
];
}
else {
$form['langcode'] = [
'#type' => 'textfield',
'#title' => $this->t('Language code'),
'#maxlength' => 12,
'#required' => TRUE,
'#default_value' => '',
'#disabled' => FALSE,
'#description' => $this->t('Use language codes as <a href=":w3ctags">defined by the W3C</a> for interoperability. <em>Examples: "en", "en-gb" and "zh-hant".</em>', [':w3ctags' => 'http://www.w3.org/International/articles/language-tags/']),
];
}
$form['label'] = [
'#type' => 'textfield',
'#title' => $this->t('Language name'),
'#maxlength' => 64,
'#default_value' => $language->label(),
'#required' => TRUE,
];
$form['direction'] = [
'#type' => 'radios',
'#title' => $this->t('Direction'),
'#required' => TRUE,
'#description' => $this->t('Direction that text in this language is presented.'),
'#default_value' => $language->getDirection(),
'#options' => [
LanguageInterface::DIRECTION_LTR => $this->t('Left to right'),
LanguageInterface::DIRECTION_RTL => $this->t('Right to left'),
],
];
return $form;
}
/**
* Validates the language editing element.
*/
public function validateCommon(array $form, FormStateInterface $form_state) {
// Ensure sane field values for langcode and name.
if (!isset($form['langcode_view']) && !preg_match('@^[a-zA-Z]{1,8}(-[a-zA-Z0-9]{1,8})*$@', $form_state->getValue('langcode'))) {
$form_state->setErrorByName('langcode', $this->t('%field must be a valid language tag as <a href=":url">defined by the W3C</a>.', [
'%field' => $form['langcode']['#title'],
':url' => 'http://www.w3.org/International/articles/language-tags/',
]));
}
if ($form_state->getValue('label') != Html::escape($form_state->getValue('label'))) {
$form_state->setErrorByName('label', $this->t('%field cannot contain any markup.', ['%field' => $form['label']['#title']]));
}
}
}