Result.php

<?php

/**
 * @file
 * Definition of Drupal\views\Plugin\views\area\Result.
 */
namespace Drupal\views\Plugin\views\area;

use Drupal\Core\Annotation\Plugin;

/**
 * Views area handler to display some configurable result summary.
 *
 * @ingroup views_area_handlers
 *
 * @Plugin(
 *   id = "result"
 * )
 */
class Result extends AreaPluginBase {
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['content'] = array(
      'default' => 'Displaying @start - @end of @total',
      'translatable' => TRUE,
    );
    return $options;
  }
  public function buildOptionsForm(&$form, &$form_state) {
    parent::buildOptionsForm($form, $form_state);
    $variables = array(
      'items' => array(
        '@start -- the initial record number in the set',
        '@end -- the last record number in the set',
        '@total -- the total records in the set',
        '@name -- the human-readable name of the view',
        '@per_page -- the number of items per page',
        '@current_page -- the current page number',
        '@current_record_count -- the current page record count',
        '@page_count -- the total page count',
      ),
    );
    $list = theme('item_list', $variables);
    $form['content'] = array(
      '#title' => t('Display'),
      '#type' => 'textarea',
      '#rows' => 3,
      '#default_value' => $this->options['content'],
      '#description' => t('You may use HTML code in this field. The following tokens are supported:') . $list,
    );
  }

  /**
   * Find out the information to render.
   */
  function render($empty = FALSE) {

    // Must have options and does not work on summaries.
    if (!isset($this->options['content']) || $this->view->plugin_name == 'default_summary') {
      return;
    }
    $output = '';
    $format = $this->options['content'];

    // Calculate the page totals.
    $current_page = (int) $this->view
      ->getCurrentPage() + 1;
    $per_page = (int) $this->view
      ->getItemsPerPage();
    $count = count($this->view->result);

    // @TODO: Maybe use a possible is views empty functionality.
    // Not every view has total_rows set, use view->result instead.
    $total = isset($this->view->total_rows) ? $this->view->total_rows : count($this->view->result);
    $name = check_plain($this->view->storage
      ->getHumanName());
    if ($per_page === 0) {
      $page_count = 1;
      $start = 1;
      $end = $total;
    }
    else {
      $page_count = (int) ceil($total / $per_page);
      $total_count = $current_page * $per_page;
      if ($total_count > $total) {
        $total_count = $total;
      }
      $start = ($current_page - 1) * $per_page + 1;
      $end = $total_count;
    }
    $current_record_count = $end - $start + 1;

    // Get the search information.
    $items = array(
      'start',
      'end',
      'total',
      'name',
      'per_page',
      'current_page',
      'current_record_count',
      'page_count',
    );
    $replacements = array();
    foreach ($items as $item) {
      $replacements["@{$item}"] = ${$item};
    }

    // Send the output.
    if (!empty($total)) {
      $output .= filter_xss_admin(str_replace(array_keys($replacements), array_values($replacements), $format));
    }
    return $output;
  }

}