class views_plugin extends views_object {
  /**
   * Init will be called after construct, when the plugin is attached to a
   * view and a display.
   */
  function init(&$view, &$display) {
    $this->view = &$view;
    $this->display = &$display;
  }

  /**
   * Provide a form to edit options for this plugin.
   */
  function options_form(&$form, &$form_state) {
  }

  /**
   * Validate the options form.
   */
  function options_validate(&$form, &$form_state) {
  }

  /**
   * Handle any special handling on the validate form.
   */
  function options_submit(&$form, &$form_state) {
  }

  /**
   * Add anything to the query that we might need to.
   */
  function query() {
  }

  /**
   * Provide a full list of possible theme templates used by this style.
   */
  function theme_functions() {
    return views_theme_functions($this->definition['theme'], $this->view, $this->display);
  }

  /**
   * Provide a list of additional theme functions for the theme information page
   */
  function additional_theme_functions() {
    $funcs = array();
    if (!empty($this->definition['additional themes'])) {
      foreach ($this->definition['additional themes'] as $theme => $type) {
        $funcs[] = views_theme_functions($theme, $this->view, $this->display);
      }
    }
    return $funcs;
  }

  /**
   * Validate that the plugin is correct and can be saved.
   *
   * @return
   *   An array of error strings to tell the user what is wrong with this
   *   plugin.
   */
  function validate() {
    return array();
  }
}