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<?php
/**
* Elgg pagination
*
* @package Elgg
* @subpackage Core
*
* @uses int $vars['offset'] The offset in the list
* @uses int $vars['limit'] Number of items per page
* @uses int $vars['count'] Number of items in list
* @uses string $vars['base_url'] Base URL to use in links
* @uses string $vars['offset_key'] The string to use for offet in the URL
*/
if (elgg_in_context('widget')) {
// widgets do not show pagination
return true;
}
$offset = abs((int) elgg_extract('offset', $vars, 0));
// because you can say $vars['limit'] = 0
if (!$limit = (int) elgg_extract('limit', $vars, 10)) {
$limit = 10;
}
$count = (int) elgg_extract('count', $vars, 0);
$offset_key = elgg_extract('offset_key', $vars, 'offset');
// some views pass an empty string for base_url
if (isset($vars['base_url']) && $vars['base_url']) {
$base_url = $vars['base_url'];
} else if (isset($vars['baseurl']) && $vars['baseurl']) {
elgg_deprecated_notice("Use 'base_url' instead of 'baseurl' for the navigation/pagination view", 1.8);
$base_url = $vars['baseurl'];
} else {
$base_url = current_page_url();
}
$num_pages = elgg_extract('num_pages', $vars, 10);
$delta = ceil($num_pages / 2);
if ($count <= $limit && $offset == 0) {
// no need for pagination
return true;
}
$total_pages = ceil($count / $limit);
$current_page = ceil($offset / $limit) + 1;
$pages = new stdClass();
$pages->prev = array(
'text' => '« ' . elgg_echo('previous'),
'href' => '',
'is_trusted' => true,
);
$pages->next = array(
'text' => elgg_echo('next') . ' »',
'href' => '',
'is_trusted' => true,
);
$pages->items = array();
// Add pages before the current page
if ($current_page > 1) {
$prev_offset = $offset - $limit;
if ($prev_offset < 0) {
$prev_offset = 0;
}
$pages->prev['href'] = elgg_http_add_url_query_elements($base_url, array($offset_key => $prev_offset));
$first_page = $current_page - $delta;
if ($first_page < 1) {
$first_page = 1;
}
$pages->items = range($first_page, $current_page - 1);
}
$pages->items[] = $current_page;
// add pages after the current one
if ($current_page < $total_pages) {
$next_offset = $offset + $limit;
if ($next_offset >= $count) {
$next_offset--;
}
$pages->next['href'] = elgg_http_add_url_query_elements($base_url, array($offset_key => $next_offset));
$last_page = $current_page + $delta;
if ($last_page > $total_pages) {
$last_page = $total_pages;
}
$pages->items = array_merge($pages->items, range($current_page + 1, $last_page));
}
echo '<ul class="elgg-pagination">';
if ($pages->prev['href']) {
$link = elgg_view('output/url', $pages->prev);
echo "<li>$link</li>";
} else {
echo "<li class=\"elgg-state-disabled\"><span>{$pages->prev['text']}</span></li>";
}
foreach ($pages->items as $page) {
if ($page == $current_page) {
echo "<li class=\"elgg-state-selected\"><span>$page</span></li>";
} else {
$page_offset = (($page - 1) * $limit);
$url = elgg_http_add_url_query_elements($base_url, array($offset_key => $page_offset));
echo "<li><a href=\"$url\">$page</a></li>";
}
}
if ($pages->next['href']) {
$link = elgg_view('output/url', $pages->next);
echo "<li>$link</li>";
} else {
echo "<li class=\"elgg-state-disabled\"><span>{$pages->next['text']}</span></li>";
}
echo '</ul>';
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