abstract class Twig_Filter

abstract class Twig_Filter implements Twig_FilterInterface {
  protected $options;
  protected $arguments = array();
  public function __construct(array $options = array()) {
    $this->options = array_merge(array(
      'needs_environment' => false,
      'needs_context' => false,
      'pre_escape' => null,
      'preserves_safety' => null,
    ), $options);
  }
  public function setArguments($arguments) {
    $this->arguments = $arguments;
  }
  public function getArguments() {
    return $this->arguments;
  }
  public function needsEnvironment() {
    return $this->options['needs_environment'];
  }
  public function needsContext() {
    return $this->options['needs_context'];
  }
  public function getSafe(Twig_Node $filterArgs) {
    if (isset($this->options['is_safe'])) {
      return $this->options['is_safe'];
    }
    if (isset($this->options['is_safe_callback'])) {
      return call_user_func($this->options['is_safe_callback'], $filterArgs);
    }
    return null;
  }
  public function getPreservesSafety() {
    return $this->options['preserves_safety'];
  }
  public function getPreEscape() {
    return $this->options['pre_escape'];
  }

}