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<?php
namespace Drupal\views\Plugin\views\field;
use Drupal\Core\Form\FormStateInterface;
use Drupal\views\ResultRow;
/**
* Field handler to show a counter of the current row.
*
* @ingroup views_field_handlers
*
* @ViewsField("counter")
*/
class Counter extends FieldPluginBase {
use UncacheableFieldHandlerTrait;
/**
* {@inheritdoc}
*/
public function usesGroupBy() {
return FALSE;
}
/**
* {@inheritdoc}
*/
protected function defineOptions() {
$options = parent::defineOptions();
$options['counter_start'] = ['default' => 1];
return $options;
}
/**
* {@inheritdoc}
*/
public function buildOptionsForm(&$form, FormStateInterface $form_state) {
$form['counter_start'] = [
'#type' => 'textfield',
'#title' => $this->t('Starting value'),
'#default_value' => $this->options['counter_start'],
'#description' => $this->t('Specify the number the counter should start at.'),
'#size' => 2,
];
parent::buildOptionsForm($form, $form_state);
}
/**
* {@inheritdoc}
*/
public function query() {
// do nothing -- to override the parent query.
}
/**
* {@inheritdoc}
*/
public function getValue(ResultRow $values, $field = NULL) {
// Note: 1 is subtracted from the counter start value below because the
// counter value is incremented by 1 at the end of this function.
$count = is_numeric($this->options['counter_start']) ? $this->options['counter_start'] - 1 : 0;
$pager = $this->view->pager;
// Get the base count of the pager.
if ($pager->usePager()) {
$count += ($pager->getItemsPerPage() * $pager->getCurrentPage() + $pager->getOffset());
}
// Add the counter for the current site.
$count += $this->view->row_index + 1;
return $count;
}
}