public function FileImageResponsiveFormatter::viewElements in File Entity (fieldable files) 8.2

Builds a renderable array for a field value.

Parameters

\Drupal\Core\Field\FieldItemListInterface $items: The field values to be rendered.

string $langcode: The language that should be used to render the field.

Return value

array A renderable array for $items, as an array of child elements keyed by consecutive numeric indexes starting from 0.

Overrides ImageFormatter::viewElements

File

src/Plugin/Field/FieldFormatter/FileImageResponsiveFormatter.php, line 123

Class

FileImageResponsiveFormatter

Plugin for responsive image formatter.

Namespace

Drupal\file_entity\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $elements = [];
  $file = $items
    ->getEntity();

  // Collect cache tags to be added for each item in the field.
  $responsive_image_style = $this->responsiveImageStyleStorage
    ->load($this
    ->getSetting('responsive_image_style'));
  $image_styles_to_load = array();
  $cache_tags = [];
  if ($responsive_image_style) {
    $cache_tags = Cache::mergeTags($cache_tags, $responsive_image_style
      ->getCacheTags());
    $image_styles_to_load = $responsive_image_style
      ->getImageStyleIds();
  }
  $image_styles = $this->imageStyleStorage
    ->loadMultiple($image_styles_to_load);
  foreach ($image_styles as $image_style) {
    $cache_tags = Cache::mergeTags($cache_tags, $image_style
      ->getCacheTags());
  }

  // Extract field item attributes for the theme function, and unset them
  // from the $item so that the field template does not re-render them.
  $item = $file->_referringItem;
  $item_attributes = $item->_attributes;
  unset($item->_attributes);
  if ($this
    ->getSetting('image_link')) {
    $url = file_url_transform_relative(file_create_url($file
      ->getFileUri()));
  }
  $elements[] = array(
    '#theme' => 'responsive_image_formatter',
    '#item' => $item,
    '#item_attributes' => $item_attributes,
    '#responsive_image_style_id' => $responsive_image_style ? $responsive_image_style
      ->id() : '',
    '#url' => !empty($url) ? $url : NULL,
    '#cache' => array(
      'tags' => $cache_tags,
    ),
  );
  return $elements;
}