* Link: http://www.drudexsoftware.com/ * License: GPLv2 * Description: Allows viewers no navigate between images using the left & right arrow keys. * Documentation: * Simply enable this extention in the extention manager to enable arrow key navigation. */ class ArrowkeyNavigation extends Extension { # Adds functionality for post/view on images public function onDisplayingImage(DisplayingImageEvent $event) { $prev_url = make_http(make_link("post/prev/".$event->image->id)); $next_url = make_http(make_link("post/next/".$event->image->id)); $this->add_arrowkeys_code($prev_url, $next_url); } # Adds functionality for post/list public function onPageRequest(PageRequestEvent $event) { if($event->page_matches("post/list")) { $pageinfo = $this->get_list_pageinfo($event); $prev_url = make_http(make_link("post/list/".$pageinfo["prev"])); $next_url = make_http(make_link("post/list/".$pageinfo["next"])); $this->add_arrowkeys_code($prev_url, $next_url); } } # adds the javascript to the page with the given urls private function add_arrowkeys_code($prev_url, $next_url) { global $page; $page->add_html_header(""); } # returns info about the current page number private function get_list_pageinfo($event) { global $config, $database; // get the amount of images per page $images_per_page = $config->get_int('index_images'); // if there are no tags, use default if ($event->get_arg(1) == null){ $prefix = ""; $page_number = (int)$event->get_arg(0); $total_pages = ceil($database->get_one( "SELECT COUNT(*) FROM images") / $images_per_page); } else { // if there are tags, use pages with tags $prefix = $event->get_arg(0)."/"; $page_number = (int)$event->get_arg(1); $total_pages = ceil($database->get_one( "SELECT count FROM tags WHERE tag=:tag", array("tag"=>$event->get_arg(0))) / $images_per_page); } // creates previous & next values // When previous first page, go to last page if ($page_number <= 1) $prev = $total_pages; else $prev = $page_number-1; if ($page_number >= $total_pages) $next = 1; else $next = $page_number+1; // Create return array $pageinfo = array( "prev" => $prefix.$prev, "next" => $prefix.$next, ); return $pageinfo; } } ?>