template_preprocess_book_navigation
function template_preprocess_book_navigation
template_preprocess_book_navigation(&$variables)
Processes variables for book-navigation.tpl.php.
Parameters
$variables: An associative array containing the following key:
- book_link
See also
File
- modules/book/book.module, line 1092
- Allows users to create and organize related content in an outline.
Code
function template_preprocess_book_navigation(&$variables) { $book_link = $variables['book_link']; // Provide extra variables for themers. Not needed by default. $variables['book_id'] = $book_link['bid']; $variables['book_title'] = check_plain($book_link['link_title']); $variables['book_url'] = 'node/' . $book_link['bid']; $variables['current_depth'] = $book_link['depth']; $variables['tree'] = ''; if ($book_link['mlid']) { $variables['tree'] = book_children($book_link); if ($prev = book_prev($book_link)) { $prev_href = url($prev['href']); drupal_add_html_head_link(array('rel' => 'prev', 'href' => $prev_href)); $variables['prev_url'] = $prev_href; $variables['prev_title'] = check_plain($prev['title']); } if ($book_link['plid'] && $parent = book_link_load($book_link['plid'])) { $parent_href = url($parent['href']); drupal_add_html_head_link(array('rel' => 'up', 'href' => $parent_href)); $variables['parent_url'] = $parent_href; $variables['parent_title'] = check_plain($parent['title']); } if ($next = book_next($book_link)) { $next_href = url($next['href']); drupal_add_html_head_link(array('rel' => 'next', 'href' => $next_href)); $variables['next_url'] = $next_href; $variables['next_title'] = check_plain($next['title']); } } $variables['has_links'] = FALSE; // Link variables to filter for values and set state of the flag variable. $links = array('prev_url', 'prev_title', 'parent_url', 'parent_title', 'next_url', 'next_title'); foreach ($links as $link) { if (isset($variables[$link])) { // Flag when there is a value. $variables['has_links'] = TRUE; } else { // Set empty to prevent notices. $variables[$link] = ''; } } }
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https://api.drupal.org/api/drupal/modules!book!book.module/function/template_preprocess_book_navigation/7.x