class/PageNav.php
<?php declare(strict_types=1);
namespace XoopsModules\News;
/*
* You may not change or alter any portion of this comment or credits
* of supporting developers from this source code or any supporting source code
* which is considered copyrighted (c) material of the original comment or credit authors.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
/**
* @copyright XOOPS Project (https://xoops.org)
* @license GNU GPL 2.0 or later (https://www.gnu.org/licenses/gpl-2.0.html)
* @author XOOPS Development Team, Kazumi Ono (AKA onokazu)
*/
/**
* Class to facilitate navigation in a multi page document/list
*
*
* @author Kazumi Ono <onokazu@xoops.org>
* @copyright (c) XOOPS Project (https://xoops.org)
*/
/**
* Class PageNav
*/
class PageNav
{
/**#@+
* @access private
*/
public $total;
public $perpage;
public $current;
public $url;
/**#@-*/
/**
* Constructor
*
* @param int $total_items Total number of items
* @param int $items_perpage Number of items per page
* @param int $current_start First item on the current page
* @param string $start_name Name for "start" or "offset"
* @param string $extra_arg Additional arguments to pass in the URL
**/
public function __construct($total_items, $items_perpage, $current_start, $start_name = 'start', $extra_arg = '')
{
$this->total = (int)$total_items;
$this->perpage = (int)$items_perpage;
$this->current = (int)$current_start;
if ('' !== $extra_arg && ('&' !== mb_substr($extra_arg, -5) || '&' !== mb_substr($extra_arg, -1))) {
$extra_arg .= '&';
}
$this->url = $_SERVER['SCRIPT_NAME'] . '?' . $extra_arg . trim($start_name) . '=';
}
/**
* Create text navigation
*
* @param int $offset
*
* @return string
**/
public function renderNav($offset = 4)
{
$ret = '';
if ($this->total <= $this->perpage) {
return $ret;
}
$total_pages = ceil($this->total / $this->perpage);
if ($total_pages > 1) {
$prev = $this->current - $this->perpage;
if ($prev >= 0) {
$ret .= '<a href="' . $this->url . $prev . '"><u>«</u></a> ';
}
$counter = 1;
$current_page = (int)floor(($this->current + $this->perpage) / $this->perpage);
while ($counter <= $total_pages) {
if ($counter == $current_page) {
$ret .= '<b>(' . $counter . ')</b> ';
} elseif (($counter > $current_page - $offset && $counter < $current_page + $offset) || 1 == $counter
|| $counter == $total_pages) {
if ($counter == $total_pages && $current_page < $total_pages - $offset) {
$ret .= '... ';
}
$ret .= '<a href="' . $this->url . (($counter - 1) * $this->perpage) . '">' . $counter . '</a> ';
if (1 == $counter && $current_page > 1 + $offset) {
$ret .= '... ';
}
}
++$counter;
}
$next = $this->current + $this->perpage;
if ($this->total > $next) {
$ret .= '<a href="' . $this->url . $next . '"><u>»</u></a> ';
}
}
return $ret;
}
/**
* Create a navigational dropdown list
*
* @param bool $showbutton Show the "Go" button?
*
* @return string
**/
public function renderSelect($showbutton = false)
{
if ($this->total < $this->perpage) {
return null;
}
$total_pages = ceil($this->total / $this->perpage);
$ret = '';
if ($total_pages > 1) {
$ret = '<form name="pagenavform">';
$ret .= '<select name="pagenavselect" onchange="location=this.options[this.options.selectedIndex].value;">';
$counter = 1;
$current_page = (int)floor(($this->current + $this->perpage) / $this->perpage);
while ($counter <= $total_pages) {
if ($counter == $current_page) {
$ret .= '<option value="' . $this->url . (($counter - 1) * $this->perpage) . '" selected>' . $counter . '</option>';
} else {
$ret .= '<option value="' . $this->url . (($counter - 1) * $this->perpage) . '">' . $counter . '</option>';
}
++$counter;
}
$ret .= '</select>';
if ($showbutton) {
$ret .= ' <input type="submit" value="' . _GO . '">';
}
$ret .= '</form>';
}
return $ret;
}
/**
* Create an enhanced navigational dropdown list
*
* @param bool $showbutton Show the "Go" button?
* @param null $titles
*
* @return string
*/
public function renderEnhancedSelect($showbutton = false, $titles = null)
{
if ($this->total < $this->perpage) {
return null;
}
$total_pages = ceil($this->total / $this->perpage);
$ret = '';
if ($total_pages > 1) {
$ret = '<form name="pagenavform">';
$ret .= '<select name="pagenavselect" onchange="location=this.options[this.options.selectedIndex].value;">';
$counter = 1;
$current_page = (int)floor(($this->current + $this->perpage) / $this->perpage);
while ($counter <= $total_pages) {
$title = $titles[$counter - 1] ?? $counter;
if ($counter == $current_page) {
$ret .= '<option value="' . $this->url . (($counter - 1) * $this->perpage) . '" selected>' . $title . '</option>';
} else {
$ret .= '<option value="' . $this->url . (($counter - 1) * $this->perpage) . '">' . $title . '</option>';
}
++$counter;
}
$ret .= '</select>';
if ($showbutton) {
$ret .= ' <input type="submit" value="' . _GO . '">';
}
$ret .= '</form>';
}
return $ret;
}
/**
* Create navigation with images
*
* @param int $offset
*
* @return string
**/
public function renderImageNav($offset = 4)
{
if ($this->total < $this->perpage) {
return null;
}
$total_pages = ceil($this->total / $this->perpage);
$ret = '';
if ($total_pages > 1) {
$ret = '<table><tr>';
$prev = $this->current - $this->perpage;
if ($prev >= 0) {
$ret .= '<td class="pagneutral"><a href="' . $this->url . $prev . '"><</a></td><td><img src="' . XOOPS_URL . '/images/blank.gif" width="6" alt=""></td>';
}
$counter = 1;
$current_page = (int)floor(($this->current + $this->perpage) / $this->perpage);
while ($counter <= $total_pages) {
if ($counter == $current_page) {
$ret .= '<td class="pagact"><b>' . $counter . '</b></td>';
} elseif (($counter > $current_page - $offset && $counter < $current_page + $offset) || 1 == $counter
|| $counter == $total_pages) {
if ($counter == $total_pages && $current_page < $total_pages - $offset) {
$ret .= '<td class="paginact">...</td>';
}
$ret .= '<td class="paginact"><a href="' . $this->url . (($counter - 1) * $this->perpage) . '">' . $counter . '</a></td>';
if (1 == $counter && $current_page > 1 + $offset) {
$ret .= '<td class="paginact">...</td>';
}
}
++$counter;
}
$next = $this->current + $this->perpage;
if ($this->total > $next) {
$ret .= '<td><img src="' . XOOPS_URL . '/images/blank.gif" width="6" alt=""></td><td class="pagneutral"><a href="' . $this->url . $next . '">></a></td>';
}
$ret .= '</tr></table>';
}
return $ret;
}
}