class SelectLanguageForm in Drupal 9

Provides the language selection form.

Note that hardcoded text provided by this form is not translated. This is because translations are downloaded as a result of submitting this form.

@internal

Hierarchy

• class \Drupal\Core\Form\FormBase implements ContainerInjectionInterface, FormInterface uses DependencySerializationTrait, LoggerChannelTrait, MessengerTrait, RedirectDestinationTrait, StringTranslationTrait
  • class \Drupal\Core\Installer\Form\SelectLanguageForm

File

core/lib/Drupal/Core/Installer/Form/SelectLanguageForm.php, line 19

Namespace

Drupal\Core\Installer\Form

class SelectLanguageForm extends FormBase {

  /**
   * {@inheritdoc}
   */
  public function getFormId() {
    return 'install_select_language_form';
  }

  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state, $install_state = NULL) {
    if (count($install_state['translations']) > 1) {
      $files = $install_state['translations'];
    }
    else {
      $files = [];
    }
    $standard_languages = LanguageManager::getStandardLanguageList();
    $select_options = [];
    $browser_options = [];
    $form['#title'] = 'Choose language';

    // Build a select list with language names in native language for the user
    // to choose from. And build a list of available languages for the browser
    // to select the language default from.
    // Select lists based on all standard languages.
    foreach ($standard_languages as $langcode => $language_names) {
      $select_options[$langcode] = $language_names[1];
      $browser_options[$langcode] = $langcode;
    }

    // Add languages based on language files in the translations directory.
    if (count($files)) {
      foreach ($files as $langcode => $uri) {
        $select_options[$langcode] = isset($standard_languages[$langcode]) ? $standard_languages[$langcode][1] : $langcode;
        $browser_options[$langcode] = $langcode;
      }
    }
    asort($select_options);
    $request = Request::createFromGlobals();
    $browser_langcode = UserAgent::getBestMatchingLangcode($request->server
      ->get('HTTP_ACCEPT_LANGUAGE'), $browser_options);
    $form['langcode'] = [
      '#type' => 'select',
      '#title' => 'Choose language',
      '#title_display' => 'invisible',
      '#options' => $select_options,
      // Use the browser detected language as default or English if nothing found.
      '#default_value' => !empty($browser_langcode) ? $browser_langcode : 'en',
    ];
    $link_to_english = install_full_redirect_url([
      'parameters' => [
        'langcode' => 'en',
      ],
    ]);
    $form['help'] = [
      '#type' => 'item',
      // #markup is XSS admin filtered which ensures unsafe protocols will be
      // removed from the url.
      '#markup' => '<p>Translations will be downloaded from the <a href="https://localize.drupal.org/download">Drupal Translation website</a>. If you do not want this, select <a href="' . $link_to_english . '">English</a>.</p>',
      '#states' => [
        'invisible' => [
          'select[name="langcode"]' => [
            'value' => 'en',
          ],
        ],
      ],
    ];
    $form['actions'] = [
      '#type' => 'actions',
    ];
    $form['actions']['submit'] = [
      '#type' => 'submit',
      '#value' => 'Save and continue',
      '#button_type' => 'primary',
    ];
    return $form;
  }

  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) {
    $build_info = $form_state
      ->getBuildInfo();
    $build_info['args'][0]['parameters']['langcode'] = $form_state
      ->getValue('langcode');
    $form_state
      ->setBuildInfo($build_info);
  }

}

Members

Name	Modifiers	Type	Description	Overrides
DependencySerializationTrait::$_entityStorages	protected	property
DependencySerializationTrait::$_serviceIds	protected	property
DependencySerializationTrait::__sleep	public	function		2
DependencySerializationTrait::__wakeup	public	function		2
FormBase::$configFactory	protected	property	The config factory.	3
FormBase::$requestStack	protected	property	The request stack.	1
FormBase::$routeMatch	protected	property	The route match.
FormBase::config	protected	function	Retrieves a configuration object.
FormBase::configFactory	protected	function	Gets the config factory for this form.	3
FormBase::container	private	function	Returns the service container.
FormBase::create	public static	function	Instantiates a new instance of this class. Overrides ContainerInjectionInterface::create	105
FormBase::currentUser	protected	function	Gets the current user.
FormBase::getRequest	protected	function	Gets the request object.
FormBase::getRouteMatch	protected	function	Gets the route match.
FormBase::logger	protected	function	Gets the logger for a specific channel.
FormBase::redirect	protected	function	Returns a redirect response object for the specified route.
FormBase::resetConfigFactory	public	function	Resets the configuration factory.
FormBase::setConfigFactory	public	function	Sets the config factory for this form.
FormBase::setRequestStack	public	function	Sets the request stack object to use.
FormBase::validateForm	public	function	Form validation handler. Overrides FormInterface::validateForm	72
LoggerChannelTrait::$loggerFactory	protected	property	The logger channel factory service.
LoggerChannelTrait::getLogger	protected	function	Gets the logger for a specific channel.
LoggerChannelTrait::setLoggerFactory	public	function	Injects the logger channel factory.
MessengerTrait::$messenger	protected	property	The messenger.	27
MessengerTrait::messenger	public	function	Gets the messenger.	27
MessengerTrait::setMessenger	public	function	Sets the messenger.
RedirectDestinationTrait::$redirectDestination	protected	property	The redirect destination service.	1
RedirectDestinationTrait::getDestinationArray	protected	function	Prepares a 'destination' URL query parameter for use with \Drupal\Core\Url.
RedirectDestinationTrait::getRedirectDestination	protected	function	Returns the redirect destination service.
RedirectDestinationTrait::setRedirectDestination	public	function	Sets the redirect destination service.
SelectLanguageForm::buildForm	public	function	Form constructor. Overrides FormInterface::buildForm
SelectLanguageForm::getFormId	public	function	Returns a unique string identifying the form. Overrides FormInterface::getFormId
SelectLanguageForm::submitForm	public	function	Form submission handler. Overrides FormInterface::submitForm
StringTranslationTrait::$stringTranslation	protected	property	The string translation service.	4
StringTranslationTrait::formatPlural	protected	function	Formats a string containing a count of items.
StringTranslationTrait::getNumberOfPlurals	protected	function	Returns the number of plurals supported by a given language.
StringTranslationTrait::getStringTranslation	protected	function	Gets the string translation service.
StringTranslationTrait::setStringTranslation	public	function	Sets the string translation service to use.	2
StringTranslationTrait::t	protected	function	Translates a string to the current language or to a given language.