template_preprocess_views_view_fields

template_preprocess_views_view_fields(&$variables)

function template_preprocess_views_view_fields(&$variables) {
  $view = $variables['view'];

  // Loop through the fields for this view.
  $previous_inline = FALSE;
  $variables['fields'] = array(); // ensure it's at least an empty array.
  /** @var \Drupal\views\ResultRow $row */
  $row = $variables['row'];
  foreach ($view->field as $id => $field) {
    // render this even if set to exclude so it can be used elsewhere.
    $field_output = $view->style_plugin->getField($row->index, $id);
    $empty = $field->isValueEmpty($field_output, $field->options['empty_zero']);
    if (empty($field->options['exclude']) && (!$empty || (empty($field->options['hide_empty']) && empty($variables['options']['hide_empty'])))) {
      $object = new stdClass();
      $object->handler = $view->field[$id];
      $object->inline = !empty($variables['options']['inline'][$id]);
      // Set up default value of the flag that indicates whether to display a
      // colon after the label.
      $object->has_label_colon = FALSE;

      $object->element_type = $object->handler->elementType(TRUE, !$variables['options']['default_field_elements'], $object->inline);
      if ($object->element_type) {
        $attributes = array();
        if ($object->handler->options['element_default_classes']) {
          $attributes['class'][] = 'field-content';
        }

        if ($classes = $object->handler->elementClasses($row->index)) {
          $attributes['class'][] = $classes;
        }
        $object->element_attributes = new Attribute($attributes);
      }

      $object->content = $field_output;
      if (isset($view->field[$id]->field_alias) && isset($row->{$view->field[$id]->field_alias})) {
        $object->raw = $row->{$view->field[$id]->field_alias};
      }
      else {
        $object->raw = NULL; // make sure it exists to reduce NOTICE
      }

      if (!empty($variables['options']['separator']) && $previous_inline && $object->inline && $object->content) {
        $object->separator = Xss::filterAdmin($variables['options']['separator']);
      }

      $object->class = Html::cleanCssIdentifier($id);

      $previous_inline = $object->inline;
      // Set up field wrapper element.
      $object->wrapper_element = $object->handler->elementWrapperType(TRUE, TRUE);
      if ($object->wrapper_element === '' && $variables['options']['default_field_elements']) {
        $object->wrapper_element = $object->inline ? 'span' : 'div';
      }

      // Set up field wrapper attributes if field wrapper was set.
      if ($object->wrapper_element) {
        $attributes = array();
        if ($object->handler->options['element_default_classes']) {
          $attributes['class'][] = 'views-field';
          $attributes['class'][] = 'views-field-' . $object->class;
        }

        if ($classes = $object->handler->elementWrapperClasses($row->index)) {
          $attributes['class'][] = $classes;
        }
        $object->wrapper_attributes = new Attribute($attributes);
      }

      // Set up field label
      $object->label = $view->field[$id]->label();

      // Set up field label wrapper and its attributes.
      if ($object->label) {
        // Add a colon in a label suffix.
        if ($object->handler->options['element_label_colon']) {
          $object->label_suffix = ': ';
          $object->has_label_colon = TRUE;
        }

        // Set up label HTML element.
        $object->label_element = $object->handler->elementLabelType(TRUE, !$variables['options']['default_field_elements']);

        // Set up label attributes.
        if ($object->label_element) {
          $attributes = array();
          if ($object->handler->options['element_default_classes']) {
            $attributes['class'][] = 'views-label';
            $attributes['class'][] = 'views-label-' . $object->class;
          }

          // Set up field label.
          $element_label_class = $object->handler->elementLabelClasses($row->index);
          if ($element_label_class) {
            $attributes['class'][] = $element_label_class;
          }
          $object->label_attributes = new Attribute($attributes);
        }
      }

      $variables['fields'][$id] = $object;
    }
  }

}