80             $toc = $this->buildToc($data);
82             if (!empty($toc)) {
83                 $this->compressToc($toc);
84                 $this->normalizeToc($toc);
85                 $this->renderToc($renderer, $toc);
105         $toc = array();
117                     $toc[] = $item;
122         return $toc;
128     private function compressToc(&$toc) {  argument
131         foreach ($toc as $item) {
140         foreach ($toc as $item) {
157         foreach ($toc as &$item) {
165     private function normalizeToc(&$toc) {  argument
168         for ($i = 0; $toc[$i]['level'] > 1; $i++) {
169             if (($toc[$i]['level'] - $offset) < 1) {
170                 $offset = $toc[$i]['level'] - 1;
173             $toc[$i]['level'] -= $offset;
180     private function renderToc($renderer, $toc) {  argument
182         $this->renderList($renderer, $toc, 0);
189     private function renderList($renderer, $toc, $index) {  argument
190         $items = count( $toc );
191         $level = $toc[$index]['level'];
195         for ($i = $index; ($i < $items) && ($toc[$i]['level'] == $level); $i++) {
198             $renderer->doc .= '<span class="qna-toc-' . $toc[$i]['class'] . '">';
199             $renderer->internallink($toc[$i]['link'], $toc[$i]['title']);
203             if ((($i + 1) < $items) && ($toc[$i + 1]['level'] > $level)) {
204                 $i = $this->renderList($renderer, $toc, $i + 1);