96 lines
2.9 KiB
PHP
96 lines
2.9 KiB
PHP
<?php
|
|
|
|
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(string $prev_url, string $next_url)
|
|
{
|
|
global $page;
|
|
|
|
$page->add_html_header("<script type=\"text/javascript\">
|
|
(function($){
|
|
$(document).keyup(function(e) {
|
|
if($(e.target).is('input', 'textarea')){ return; }
|
|
if (e.metaKey || e.ctrlKey || e.altKey || e.shiftKey) { return; }
|
|
if (e.keyCode == 37) { window.location.href = '{$prev_url}'; }
|
|
else if (e.keyCode == 39) { window.location.href = '{$next_url}'; }
|
|
});
|
|
})(jQuery);
|
|
</script>", 60);
|
|
}
|
|
|
|
/**
|
|
* Returns info about the current page number.
|
|
*/
|
|
private function get_list_pageinfo(PageRequestEvent $event): array
|
|
{
|
|
global $config, $database;
|
|
|
|
// get the amount of images per page
|
|
$images_per_page = $config->get_int(IndexConfig::IMAGES);
|
|
|
|
if ($event->count_args() > 1) {
|
|
// if there are tags, use pages with tags
|
|
$prefix = url_escape($event->get_arg(0)) . "/";
|
|
$page_number = $event->try_page_num(1);
|
|
$total_pages = ceil($database->get_one(
|
|
"SELECT count FROM tags WHERE tag=:tag",
|
|
["tag"=>$event->get_arg(0)]
|
|
) / $images_per_page);
|
|
} else {
|
|
// if there are no tags, use default
|
|
$prefix = "";
|
|
$page_number = $event->try_page_num(0);
|
|
$total_pages = ceil($database->get_one(
|
|
"SELECT COUNT(*) FROM images"
|
|
) / $images_per_page);
|
|
}
|
|
|
|
// creates previous & next values
|
|
// When previous first page, go to last page
|
|
if ($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 = [
|
|
"prev" => $prefix.$prev,
|
|
"next" => $prefix.$next,
|
|
];
|
|
|
|
return $pageinfo;
|
|
}
|
|
}
|