public function EpubCoverImage::viewElements in Epub 8

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 FormatterInterface::viewElements

File

src/Plugin/Field/FieldFormatter/EpubCoverImage.php, line 31

Contains \Drupal\epub\Plugin\Field\FieldFormatter\EpubCoverImage.

Class

EpubCoverImage

Plugin implementation of the 'epub' formatter.

Namespace

Drupal\epub\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $elements = array();
  foreach ($this
    ->getEntitiesToView($items, $langcode) as $delta => $file) {
    $file_url = file_create_url($file
      ->getFileUri());
    if ($file
      ->getMimeType() == 'application/epub+zip') {
      $elements[$delta] = array(
        '#theme' => 'epub_formatter_cover',
        '#file' => $file_url,
        '#width' => $this
          ->getSetting('width'),
      );
      $dir = 'public://epub_content/' . $file
        ->id();
      $scan = file_scan_directory($dir, '/.*\\.opf$/');
      $opf = array_shift($scan);
      if (isset($opf)) {
        $opfXML = simplexml_load_file($opf->uri);
        $opfXML
          ->registerXPathNamespace('opf', 'http://www.idpf.org/2007/opf');
        $element = $opfXML
          ->xpath('/opf:package/opf:metadata/opf:meta[@name="cover"]');
        if (count($element)) {
          $attributes = $element[0]
            ->attributes();
          $elements[$delta]['#image'] = file_create_url(epub_get_item($dir, (string) $attributes['content']));
        }
      }
    }
    else {
      $elements[$delta] = array(
        '#theme' => 'file_link',
        '#file' => $file,
      );
    }
  }
  return $elements;
}