class Numeric

1. 8.x drupal/core/modules/views/lib/Drupal/views/Plugin/views/field/Numeric.php \Drupal\views\Plugin\views\field\Numeric
2. 8.x drupal/core/modules/views/lib/Drupal/views/Plugin/views/argument/Numeric.php \Drupal\views\Plugin\views\argument\Numeric
3. 8.x drupal/core/modules/views/lib/Drupal/views/Plugin/views/argument_validator/Numeric.php \Drupal\views\Plugin\views\argument_validator\Numeric
4. 8.x drupal/core/modules/views/lib/Drupal/views/Plugin/views/filter/Numeric.php \Drupal\views\Plugin\views\filter\Numeric

MappingTest.php in drupal/core/modules/views/tests/views_test_data/lib/Drupal/views_test_data/Plugin/views/style/MappingTest.php

Definition of Drupal\views_test_data\Plugin\views\style\MappingTest;

NodeNewComments.php in drupal/core/modules/comment/lib/Drupal/comment/Plugin/views/field/NodeNewComments.php

Definition of Drupal\comment\Plugin\views\field\NodeNewComments.

Score.php in drupal/core/modules/search/lib/Drupal/search/Plugin/views/field/Score.php

Definition of Drupal\search\Plugin\views\field\Score.

views.argument.schema.yml in drupal/core/modules/views/config/schema/views.argument.schema.yml

drupal/core/modules/views/config/schema/views.argument.schema.yml

views.argument_validator.schema.yml in drupal/core/modules/views/config/schema/views.argument_validator.schema.yml

drupal/core/modules/views/config/schema/views.argument_validator.schema.yml

views.field.schema.yml in drupal/core/modules/views/config/schema/views.field.schema.yml

drupal/core/modules/views/config/schema/views.field.schema.yml

views.filter.schema.yml in drupal/core/modules/views/config/schema/views.filter.schema.yml

drupal/core/modules/views/config/schema/views.filter.schema.yml

class Numeric extends FieldPluginBase {
  protected function defineOptions() {
    $options = parent::defineOptions();
    $options['set_precision'] = array(
      'default' => FALSE,
      'bool' => TRUE,
    );
    $options['precision'] = array(
      'default' => 0,
    );
    $options['decimal'] = array(
      'default' => '.',
      'translatable' => TRUE,
    );
    $options['separator'] = array(
      'default' => ',',
      'translatable' => TRUE,
    );
    $options['format_plural'] = array(
      'default' => FALSE,
      'bool' => TRUE,
    );
    $options['format_plural_singular'] = array(
      'default' => '1',
    );
    $options['format_plural_plural'] = array(
      'default' => '@count',
    );
    $options['prefix'] = array(
      'default' => '',
      'translatable' => TRUE,
    );
    $options['suffix'] = array(
      'default' => '',
      'translatable' => TRUE,
    );
    return $options;
  }
  public function buildOptionsForm(&$form, &$form_state) {
    if (!empty($this->definition['float'])) {
      $form['set_precision'] = array(
        '#type' => 'checkbox',
        '#title' => t('Round'),
        '#description' => t('If checked, the number will be rounded.'),
        '#default_value' => $this->options['set_precision'],
      );
      $form['precision'] = array(
        '#type' => 'textfield',
        '#title' => t('Precision'),
        '#default_value' => $this->options['precision'],
        '#description' => t('Specify how many digits to print after the decimal point.'),
        '#states' => array(
          'visible' => array(
            ':input[name="options[set_precision]"]' => array(
              'checked' => TRUE,
            ),
          ),
        ),
        '#size' => 2,
      );
      $form['decimal'] = array(
        '#type' => 'textfield',
        '#title' => t('Decimal point'),
        '#default_value' => $this->options['decimal'],
        '#description' => t('What single character to use as a decimal point.'),
        '#size' => 2,
      );
    }
    $form['separator'] = array(
      '#type' => 'select',
      '#title' => t('Thousands marker'),
      '#options' => array(
        '' => t('- None -'),
        ',' => t('Comma'),
        ' ' => t('Space'),
        '.' => t('Decimal'),
        '\'' => t('Apostrophe'),
      ),
      '#default_value' => $this->options['separator'],
      '#description' => t('What single character to use as the thousands separator.'),
      '#size' => 2,
    );
    $form['format_plural'] = array(
      '#type' => 'checkbox',
      '#title' => t('Format plural'),
      '#description' => t('If checked, special handling will be used for plurality.'),
      '#default_value' => $this->options['format_plural'],
    );
    $form['format_plural_singular'] = array(
      '#type' => 'textfield',
      '#title' => t('Singular form'),
      '#default_value' => $this->options['format_plural_singular'],
      '#description' => t('Text to use for the singular form.'),
      '#states' => array(
        'visible' => array(
          ':input[name="options[format_plural]"]' => array(
            'checked' => TRUE,
          ),
        ),
      ),
    );
    $form['format_plural_plural'] = array(
      '#type' => 'textfield',
      '#title' => t('Plural form'),
      '#default_value' => $this->options['format_plural_plural'],
      '#description' => t('Text to use for the plural form, @count will be replaced with the value.'),
      '#states' => array(
        'visible' => array(
          ':input[name="options[format_plural]"]' => array(
            'checked' => TRUE,
          ),
        ),
      ),
    );
    $form['prefix'] = array(
      '#type' => 'textfield',
      '#title' => t('Prefix'),
      '#default_value' => $this->options['prefix'],
      '#description' => t('Text to put before the number, such as currency symbol.'),
    );
    $form['suffix'] = array(
      '#type' => 'textfield',
      '#title' => t('Suffix'),
      '#default_value' => $this->options['suffix'],
      '#description' => t('Text to put after the number, such as currency symbol.'),
    );
    parent::buildOptionsForm($form, $form_state);
  }
  function render($values) {
    $value = $this
      ->getValue($values);
    if (!empty($this->options['set_precision'])) {
      $value = number_format($value, $this->options['precision'], $this->options['decimal'], $this->options['separator']);
    }
    else {
      $remainder = abs($value) - intval(abs($value));
      $value = $value > 0 ? floor($value) : ceil($value);
      $value = number_format($value, 0, '', $this->options['separator']);
      if ($remainder) {

        // The substr may not be locale safe.
        $value .= $this->options['decimal'] . substr($remainder, 2);
      }
    }

    // Check to see if hiding should happen before adding prefix and suffix.
    if ($this->options['hide_empty'] && empty($value) && ($value !== 0 || $this->options['empty_zero'])) {
      return '';
    }

    // Should we format as a plural.
    if (!empty($this->options['format_plural'])) {
      $value = format_plural($value, $this->options['format_plural_singular'], $this->options['format_plural_plural']);
    }
    return $this
      ->sanitizeValue($this->options['prefix'], 'xss') . $this
      ->sanitizeValue($value) . $this
      ->sanitizeValue($this->options['suffix'], 'xss');
  }

}