function rdf_preprocess_field in Drupal 7

Implements MODULE_preprocess_HOOK().

File

modules/rdf/rdf.module, line 543

Enables semantically enriched output for Drupal sites in the form of RDFa.

Code

function rdf_preprocess_field(&$variables) {
  $element = $variables['element'];
  $mapping = rdf_mapping_load($element['#entity_type'], $element['#bundle']);
  $field_name = $element['#field_name'];
  if (!empty($mapping) && !empty($mapping[$field_name])) {
    foreach ($element['#items'] as $delta => $item) {
      $variables['item_attributes_array'][$delta] = rdf_rdfa_attributes($mapping[$field_name], $item);

      // If this field is an image, RDFa will not output correctly when the
      // image is in a containing <a> tag. If the field is a file, RDFa will
      // not output correctly if the filetype icon comes before the link to the
      // file. We correct this by adding a resource attribute to the div if
      // this field has a URI.
      if (isset($item['uri'])) {
        if (!empty($element[$delta]['#image_style'])) {
          $variables['item_attributes_array'][$delta]['resource'] = image_style_url($element[$delta]['#image_style'], $item['uri']);
        }
        else {
          $variables['item_attributes_array'][$delta]['resource'] = file_create_url($item['uri']);
        }
      }
    }
  }
}