class Mini

class Mini extends SqlBase {
    
    /**
     * Overrides \Drupal\views\Plugin\views\pager\PagerPlugin::defineOptions().
     *
     * Provides sane defaults for the next/previous links.
     */
    public function defineOptions() {
        $options = parent::defineOptions();
        $options['tags']['contains']['previous']['default'] = '‹‹';
        $options['tags']['contains']['next']['default'] = '››';
        return $options;
    }
    
    /**
     * {@inheritdoc}
     */
    public function summaryTitle() {
        if (!empty($this->options['offset'])) {
            return $this->formatPlural($this->options['items_per_page'], 'Mini pager, @count item, skip @skip', 'Mini pager, @count items, skip @skip', [
                '@count' => $this->options['items_per_page'],
                '@skip' => $this->options['offset'],
            ]);
        }
        return $this->formatPlural($this->options['items_per_page'], 'Mini pager, @count item', 'Mini pager, @count items', [
            '@count' => $this->options['items_per_page'],
        ]);
    }
    
    /**
     * {@inheritdoc}
     */
    public function query() {
        parent::query();
        // Only modify the query if we don't want to do a total row count
        if (!$this->view->get_total_rows) {
            // Don't query for the next page if we have a pager that has a limited
            // amount of pages.
            if ($this->getItemsPerPage() > 0 && (empty($this->options['total_pages']) || $this->getCurrentPage() < $this->options['total_pages'])) {
                // Increase the items in the query in order to be able to find out
                // whether there is another page.
                $limit = $this->view->query
                    ->getLimit();
                $limit += 1;
                $this->view->query
                    ->setLimit($limit);
            }
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function useCountQuery() {
        return FALSE;
    }
    
    /**
     * {@inheritdoc}
     */
    public function postExecute(&$result) {
        // Only modify the result if we didn't do a total row count
        if (!$this->view->get_total_rows) {
            $this->total_items = $this->getCurrentPage() * $this->getItemsPerPage() + count($result);
            // query() checks if we need a next link by setting limit 1 record past
            // this page If we got the extra record we need to remove it before we
            // render the result.
            if ($this->getItemsPerPage() > 0 && count($result) > $this->getItemsPerPage()) {
                array_pop($result);
            }
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function render($input) {
        // The 1, 3 indexes are correct, see template_preprocess_pager().
        $tags = [
            1 => $this->options['tags']['previous'],
            3 => $this->options['tags']['next'],
        ];
        return [
            '#theme' => $this->themeFunctions(),
            '#tags' => $tags,
            '#element' => $this->options['id'],
            '#parameters' => $input,
            '#route_name' => !empty($this->view->live_preview) ? '<current>' : '<none>',
        ];
    }

}