Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\system\Plugin\Condition;
Chris@0: 
Chris@0: use Drupal\Core\Condition\ConditionPluginBase;
Chris@0: use Drupal\Core\Extension\ThemeHandlerInterface;
Chris@0: use Drupal\Core\Form\FormStateInterface;
Chris@0: use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
Chris@0: use Drupal\Core\Theme\ThemeManagerInterface;
Chris@0: use Symfony\Component\DependencyInjection\ContainerInterface;
Chris@0: 
Chris@0: /**
Chris@0:  * Provides a 'Current Theme' condition.
Chris@0:  *
Chris@0:  * @Condition(
Chris@0:  *   id = "current_theme",
Chris@0:  *   label = @Translation("Current Theme"),
Chris@0:  * )
Chris@0:  */
Chris@0: class CurrentThemeCondition extends ConditionPluginBase implements ContainerFactoryPluginInterface {
Chris@0: 
Chris@0:   /**
Chris@0:    * The theme manager.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Theme\ThemeManagerInterface
Chris@0:    */
Chris@0:   protected $themeManager;
Chris@0: 
Chris@0:   /**
Chris@0:    * The theme handler.
Chris@0:    *
Chris@0:    * @var \Drupal\Core\Extension\ThemeHandlerInterface
Chris@0:    */
Chris@0:   protected $themeHandler;
Chris@0: 
Chris@0:   /**
Chris@0:    * Constructs a CurrentThemeCondition condition plugin.
Chris@0:    *
Chris@0:    * @param array $configuration
Chris@0:    *   A configuration array containing information about the plugin instance.
Chris@0:    * @param string $plugin_id
Chris@0:    *   The plugin_id for the plugin instance.
Chris@0:    * @param mixed $plugin_definition
Chris@0:    *   The plugin implementation definition.
Chris@0:    * @param \Drupal\Core\Theme\ThemeManagerInterface $theme_manager
Chris@0:    *   The theme manager.
Chris@0:    * @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
Chris@0:    *   The theme handler.
Chris@0:    */
Chris@0:   public function __construct(array $configuration, $plugin_id, $plugin_definition, ThemeManagerInterface $theme_manager, ThemeHandlerInterface $theme_handler) {
Chris@0:     parent::__construct($configuration, $plugin_id, $plugin_definition);
Chris@0:     $this->themeManager = $theme_manager;
Chris@0:     $this->themeHandler = $theme_handler;
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
Chris@0:     return new static(
Chris@0:       $configuration,
Chris@0:       $plugin_id,
Chris@0:       $plugin_definition,
Chris@0:       $container->get('theme.manager'),
Chris@0:       $container->get('theme_handler')
Chris@0:     );
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function defaultConfiguration() {
Chris@0:     return ['theme' => ''] + parent::defaultConfiguration();
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
Chris@0:     $form['theme'] = [
Chris@0:       '#type' => 'select',
Chris@0:       '#title' => $this->t('Theme'),
Chris@0:       '#default_value' => $this->configuration['theme'],
Chris@0:       '#options' => array_map(function ($theme_info) {
Chris@0:         return $theme_info->info['name'];
Chris@0:       }, $this->themeHandler->listInfo()),
Chris@0:     ];
Chris@0:     return parent::buildConfigurationForm($form, $form_state);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
Chris@0:     $this->configuration['theme'] = $form_state->getValue('theme');
Chris@0:     parent::submitConfigurationForm($form, $form_state);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function evaluate() {
Chris@0:     if (!$this->configuration['theme']) {
Chris@0:       return TRUE;
Chris@0:     }
Chris@0: 
Chris@0:     return $this->themeManager->getActiveTheme()->getName() == $this->configuration['theme'];
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function summary() {
Chris@0:     if ($this->isNegated()) {
Chris@0:       return $this->t('The current theme is not @theme', ['@theme' => $this->configuration['theme']]);
Chris@0:     }
Chris@0: 
Chris@0:     return $this->t('The current theme is @theme', ['@theme' => $this->configuration['theme']]);
Chris@0:   }
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getCacheContexts() {
Chris@0:     $contexts = parent::getCacheContexts();
Chris@0:     $contexts[] = 'theme';
Chris@0:     return $contexts;
Chris@0:   }
Chris@0: 
Chris@0: }