class FilesystemLoader in Drupal 9

Loads templates from the filesystem.

This loader adds module and theme template paths as namespaces to the Twig filesystem loader so that templates can be referenced by namespace, like @block/block.html.twig or @my_theme/page.html.twig.

Hierarchy

• class \Drupal\Core\Template\Loader\FilesystemLoader extends \Twig\Loader\FilesystemLoader

1 string reference to 'FilesystemLoader'

core.services.yml in core/core.services.yml

core/core.services.yml

1 service uses FilesystemLoader

twig.loader.filesystem in core/core.services.yml

Drupal\Core\Template\Loader\FilesystemLoader

File

core/lib/Drupal/Core/Template/Loader/FilesystemLoader.php, line 16

Namespace

Drupal\Core\Template\Loader

class FilesystemLoader extends TwigFilesystemLoader {

  /**
   * Constructs a new FilesystemLoader object.
   *
   * @param string|array $paths
   *   A path or an array of paths to check for templates.
   * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
   *   The module handler service.
   * @param \Drupal\Core\Extension\ThemeHandlerInterface $theme_handler
   *   The theme handler service.
   */
  public function __construct($paths, ModuleHandlerInterface $module_handler, ThemeHandlerInterface $theme_handler) {
    parent::__construct($paths);

    // Add namespaced paths for modules and themes.
    $namespaces = [];
    foreach ($module_handler
      ->getModuleList() as $name => $extension) {
      $namespaces[$name] = $extension
        ->getPath();
    }
    foreach ($theme_handler
      ->listInfo() as $name => $extension) {
      $namespaces[$name] = $extension
        ->getPath();
    }
    foreach ($namespaces as $name => $path) {
      $this
        ->addPath($path . '/templates', $name);
    }
  }

  /**
   * Adds a path where templates are stored.
   *
   * @param string $path
   *   A path where to look for templates.
   * @param string $namespace
   *   (optional) A path name.
   */
  public function addPath($path, $namespace = self::MAIN_NAMESPACE) {

    // Invalidate the cache.
    $this->cache = [];
    $this->paths[$namespace][] = rtrim($path, '/\\');
  }

}

Members

Name	Modifiers	Type	Description	Overrides
FilesystemLoader::addPath	public	function	Adds a path where templates are stored.
FilesystemLoader::__construct	public	function	Constructs a new FilesystemLoader object.