www.aleph1.co.uk Git - yaffs-website/blob - web/core/modules/views/src/Plugin/views/filter/LanguageFilter.php

   1 <?php
   2
   3 namespace Drupal\views\Plugin\views\filter;
   4
   5 use Drupal\Core\Language\LanguageInterface;
   6 use Drupal\Core\Language\LanguageManagerInterface;
   7 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
   8 use Drupal\views\Plugin\views\PluginBase;
   9 use Symfony\Component\DependencyInjection\ContainerInterface;
  10
  11 /**
  12  * Provides filtering by language.
  13  *
  14  * @ingroup views_filter_handlers
  15  *
  16  * @ViewsFilter("language")
  17  */
  18 class LanguageFilter extends InOperator implements ContainerFactoryPluginInterface {
  19
  20   /**
  21    * The language manager.
  22    *
  23    * @var \Drupal\Core\Language\LanguageManagerInterface
  24    */
  25   protected $languageManager;
  26
  27   /**
  28    * Constructs a new LanguageFilter instance.
  29    *
  30    * @param array $configuration
  31    *   A configuration array containing information about the plugin instance.
  32    * @param string $plugin_id
  33    *   The plugin_id for the plugin instance.
  34    * @param mixed $plugin_definition
  35    *   The plugin implementation definition.
  36    * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
  37    *   The language manager.
  38    */
  39   public function __construct($configuration, $plugin_id, $plugin_definition, LanguageManagerInterface $language_manager) {
  40     parent::__construct($configuration, $plugin_id, $plugin_definition);
  41
  42     $this->languageManager = $language_manager;
  43   }
  44
  45   /**
  46    * {@inheritdoc}
  47    */
  48   public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
  49     return new static(
  50       $configuration,
  51       $plugin_id,
  52       $plugin_definition,
  53       $container->get('language_manager')
  54     );
  55   }
  56
  57   /**
  58    * {@inheritdoc}
  59    */
  60   public function getValueOptions() {
  61     if (!isset($this->valueOptions)) {
  62       $this->valueTitle = $this->t('Language');
  63       // Pass the current values so options that are already selected do not get
  64       // lost when there are changes in the language configuration.
  65       $this->valueOptions = $this->listLanguages(LanguageInterface::STATE_ALL | LanguageInterface::STATE_SITE_DEFAULT | PluginBase::INCLUDE_NEGOTIATED, array_keys($this->value));
  66     }
  67     return $this->valueOptions;
  68   }
  69
  70   /**
  71    * {@inheritdoc}
  72    */
  73   public function query() {
  74     // Don't filter by language in case the site is not multilingual, because
  75     // there is no point in doing so.
  76     if (!$this->languageManager->isMultilingual()) {
  77       return;
  78     }
  79
  80     parent::query();
  81   }
  82
  83 }