function rdf_process

Template process function for adding extra tags to hold RDFa attributes.

Since template files already have built-in support for $attributes, $title_attributes, and $content_attributes, and field templates have support for $item_attributes, we try to leverage those as much as possible. However, in some cases additional attributes are needed not covered by these. We deal with those here.

File

drupal/modules/rdf/rdf.module, line 455

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

Code

function rdf_process(&$variables, $hook) {

  // Handles attributes needed for content not covered by title, content,
  // and field items. It does this by adjusting the variable sent to the
  // template so that the template doesn't have to worry about it. See
  // theme_rdf_template_variable_wrapper().
  if (!empty($variables['rdf_template_variable_attributes_array'])) {
    foreach ($variables['rdf_template_variable_attributes_array'] as $variable_name => $attributes) {
      $context = array(
        'hook' => $hook,
        'variable_name' => $variable_name,
        'variables' => $variables,
      );
      $variables[$variable_name] = theme('rdf_template_variable_wrapper', array(
        'content' => $variables[$variable_name],
        'attributes' => $attributes,
        'context' => $context,
      ));
    }
  }

  // Handles additional attributes about a template entity that for RDF parsing
  // reasons, can't be placed into that template's $attributes variable. This
  // is "meta" information that is related to particular content, so render it
  // close to that content.
  if (!empty($variables['rdf_metadata_attributes_array'])) {
    if (!isset($variables['content']['#prefix'])) {
      $variables['content']['#prefix'] = '';
    }
    $variables['content']['#prefix'] = theme('rdf_metadata', array(
      'metadata' => $variables['rdf_metadata_attributes_array'],
    )) . $variables['content']['#prefix'];
  }
}