array(
'variables' => array('content' => NULL, 'title' => NULL, 'type' => 'ul'),
),
'toc_formatter_move_to_top_link' => array(
'variables' => array('content' => NULL),
),
);
return $theme;
}
/**
* Theming functions for 'Move to top' links.
*/
function theme_toc_formatter_move_to_top_link($variables) {
$content = $variables['content'];
$path_alias = request_uri();
$link = '';
$link .= l(t('Move to top'), $path_alias, array('fragment' => 'table-of-contents'));
$link .= '
';
$output = str_ireplace('', ''. $link, $content);
return $output;
}
/**
* Generate table of contents, add anchors to headings, and add links back to top of page.
*
**/
function theme_toc_formatter_table_of_contents($variables) {
$title = $variables['title'];
$content = $variables['content'];
$type = $variables['type'];
$path = request_uri();
$links = array();
$anchor = 0;
$output = '';
$dom_document = new DOMDocument('1.0','utf-8');
@$dom_document->loadHTML(''. $content .'
');
$headers = $dom_document->getElementsByTagName('h2');
foreach ($headers as $header) {
$anchor++;
// TOC links.
$label = trim($header->nodeValue);
$links[] = l($label, $path, array('fragment' => 'toc-'. $anchor));
// Headings, add class.
$header->setAttribute('class', 'toc-headings');
// Anchors above headings.
$anchor_div = $dom_document->createElement('div');
$anchor_div->setAttribute('class', 'toc-item-anchor');
$target = $dom_document->createElement('a');
$target->setAttribute('name', 'toc-'. $anchor);
$anchor_div->appendChild($target);
$header->parentNode->insertBefore($anchor_div, $header);
}
if (isset($links) && !empty($links)) {
// Output DOM to a string.
// Unfortunately below PHP 5.3.6 saveHTML() doesn't expect a parameter.
$content_updated = $dom_document->saveHTML();
// So we have to remove wrapping tags ourseleves.
$content_fragments = explode('', $content_updated);
$content_inner = str_replace('