public function FieldPdfReaderField::viewElements in PDF Reader 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/FieldPdfReaderField.php, line 159

Class

FieldPdfReaderField

Plugin implementation of the 'FieldPdfReaderFields' formatter.

Namespace

Drupal\pdf_reader\Plugin\Field\FieldFormatter

Code

public function viewElements(FieldItemListInterface $items, $langcode) {
  $elements = [];
  $field_display_type = $this
    ->getSetting('renderer');
  $width = $this
    ->getSetting('pdf_width');
  $height = $this
    ->getSetting('pdf_height');
  $download_placement = $this
    ->getSetting('link_placement');
  $fit = $this
    ->getSetting('embed_view_fit');
  $toolbar = $this
    ->getSetting('embed_hide_toolbar');
  $fragment = http_build_query([
    'view' => $fit,
    'toolbar' => $toolbar ? 0 : 1,
  ]);
  foreach ($items as $delta => $item) {
    if ($values = $item
      ->getValue('values')) {
      if (isset($values['target_id']) && !empty($values['target_id']) && is_numeric($values['target_id'])) {
        $file = \Drupal::entityTypeManager()
          ->getStorage('file')
          ->load($values['target_id']);
        if (isset($file) and is_object($file)) {
          $file_url = file_create_url($file
            ->getFileUri());
          $file_name = $file
            ->getFileName();
        }
      }
      elseif (isset($values['value']) && !empty($values['value'])) {
        if (UrlHelper::isValid($values['value'])) {
          $file_url = file_create_url($values['value']);
          $file_name = $file_url;
        }
      }
      if (isset($file_url)) {
        switch ($field_display_type) {
          case 'google':
          case 'ms':
            $field_display_type == 'google' ? $file_path = self::GOOGLE_VIEWER . '?embedded=true&url=' . urlencode($file_url) : ($file_path = self::MICROSOFT_VIEWER . '?src=' . urlencode($file_url));
            $elements[$delta] = [
              '#theme' => 'pdf_reader',
              '#service' => $field_display_type,
              '#file_url' => $file_path,
              '#width' => $width,
              '#height' => $height,
            ];
            break;
          case 'embed':
            $elements[$delta] = [
              '#theme' => 'pdf_reader_embed',
              '#service' => $field_display_type,
              '#width' => $width,
              '#height' => $height,
              '#file_url' => Url::fromUri($file_url, [
                'fragment' => $fragment,
              ])
                ->toUriString(),
              '#text' => $this
                ->t('It appears your Web browser is not configured to display PDF files.') . Link::fromTextAndUrl($this
                ->t('Download adobe Acrobat'), Url::fromUri('http://www.adobe.com/products/reader.html'))
                ->toString() . ' ' . $this
                ->t('or') . ' ' . Link::fromTextAndUrl($this
                ->t('Click here to download the PDF file.'), Url::fromUri($file_url))
                ->toString(),
            ];
            break;
          case 'pdf-js':
            $module_path = base_path() . drupal_get_path('module', 'pdf_reader');
            $elements[$delta] = [
              '#theme' => 'pdf_reader_js',
              '#service' => $field_display_type,
              '#attached' => [
                'drupalSettings' => [
                  'pdf_reader' => [
                    'file_url' => $file_url,
                    'path_pdf_reader' => "{$module_path}/js/pdf.js",
                  ],
                ],
                'library' => [
                  "pdf_reader/global-styling",
                ],
              ],
            ];
            break;
          case 'colorbox':
            $elements[$delta] = [
              '#theme' => 'pdf_reader_colorbox',
              '#service' => $field_display_type,
              '#file_url' => $file_url,
              '#file_name' => $file_name,
              '#width' => $width,
              '#height' => $height,
            ];
            break;
        }
        if ($this
          ->getSetting('download')) {
          $elements[$delta]['#download_link'] = $file_url;
          if (!empty($download_placement) && $download_placement == 'top') {
            $elements[$delta]['#top'] = 'top';
          }
          else {
            $elements[$delta]['#bottom'] = 'bottom';
          }
          $elements[$delta]['#attached']['library'][] = 'pdf_reader/download-link-css';
        }
        if ($this
          ->isColorboxInstalled()) {
          $elements[$delta]['#attached']['library'][] = 'pdf_reader/colorbox';
        }
      }
    }
  }
  return $elements;
}