function Helper::isActive

Helper function for check if admin is active.

File

core/themes/admin/src/Helper.php, line 203

Class

Helper

Admin helper methods.

Namespace

Code

public static function isActive() : bool {
  if (self::$active === NULL) {
    // Check if set as admin theme.
    $admin_theme_name = \Drupal::config('system.theme')->get('admin');
    if ($admin_theme_name === 'admin') {
      return TRUE;
    }
    $theme_handler = \Drupal::service('theme_handler')->listInfo();
    // Check if set as frontend theme.
    $frontend_theme_name = \Drupal::config('system.theme')->get('default');
    // Check if base themes are set.
    if (isset($theme_handler[$frontend_theme_name]->base_themes)) {
      $frontend_base_themes = $theme_handler[$frontend_theme_name]->base_themes;
    }
    // Add theme name to base theme array.
    $frontend_base_themes[$frontend_theme_name] = $frontend_theme_name;
    // Admin theme will have no value if it is set to use the default theme.
    if ($admin_theme_name && isset($theme_handler[$admin_theme_name]->base_themes)) {
      $admin_base_themes = $theme_handler[$admin_theme_name]->base_themes;
      $admin_base_themes[$admin_theme_name] = $admin_theme_name;
    }
    else {
      $admin_base_themes = $frontend_base_themes;
    }
    $base_themes = array_merge($admin_base_themes, $frontend_base_themes);
    self::$active = array_key_exists('admin', $base_themes);
  }
  return self::$active;
}