58      * @param Event $event
62     public function handleHeader(Event &$event, $param)  argument
68         foreach ($event->data['link'] as $link) {
72         $event->data['link'][] = [
82      * @param Event $event
86     public function handleToc(Event &$event, $param)  argument
90         if ($helper === null || !is_array($event->data)) return;
92         foreach ($event->data as $index => $item) {
95             $event->data[$index]['title'] = $this->filterTocTitle((string) $item['title'], $helper);
102      * @param Event $event
106     public function handleRendererPostprocess(Event &$event, $param)  argument
113             !is_array($event->data) ||
114             ($event->data[0] ?? '') !== 'xhtml' ||
115             !isset($event->data[1]) ||
116             !is_string($event->data[1])
121         $event->data[1] = $this->replaceHeadingIconTokens($event->data[1], $helper);
122         $event->data[1] = $this->replaceLinkIconTokens($event->data[1], $helper);
123         $event->data[1] = $this->replaceCatlistIconTokens($event->data[1], $helper);
129      * @param Event $event
133     public function handleContentDisplay(Event &$event, $param)  argument
137         if ($helper === null || !$helper->hasActivePackage() || !is_string($event->data)) return;
139         $event->data = preg_replace_callback(
144             $event->data
151      * @param Event $event
155     public function handleToolbar(Event &$event, $param)  argument
179         $insertAt = count($event->data);
180         foreach ($event->data as $index => $item) {
187         array_splice($event->data, $insertAt, 0, [$button]);
196      * @param Event $event
200     public function handleJsCache(Event &$event, $param)  argument
202         if (!isset($event->data->depends['files']) || !is_array($event->data->depends['files'])) {
203             $event->data->depends['files'] = [];
213                 $event->data->depends['files'][] = $file;