Source for file Sliding.php
Documentation is available at Sliding.php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
* Contains the Pager_Sliding class
* LICENSE: Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* @author Lorenzo Alberton <l dot alberton at quipo dot it>
* @copyright 2003-2006 Lorenzo Alberton
* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
* @version CVS: $Id: Sliding.php,v 1.12 2007/07/29 08:10:34 quipo Exp $
* @link http://pear.php.net/package/Pager
* require PEAR::Pager_Common base class
require_once 'Pager/Common.php';
* Pager_Sliding - Generic data paging class ("sliding window" style)
* Usage examples can be found in the PEAR manual
* @author Lorenzo Alberton <l dot alberton at quipo dot it>
* @copyright 2003-2005 Lorenzo Alberton
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @link http://pear.php.net/package/Pager
* @param array $options An associative array of option names
//set default Pager_Sliding options
$this->_prevImg = '«';
$this->_nextImg = '»';
$this->_spacesBeforeSeparator = 3;
$this->_spacesAfterSeparator = 3;
$this->_curPageSpanPre = '<b><u>';
$this->_curPageSpanPost = '</u></b>';
// {{{ getPageIdByOffset()
* "Overload" PEAR::Pager method. VOID. Not needed here...
* @param integer $index Offset to get pageID for
// {{{ getPageRangeByPageId()
* Given a PageId, it returns the limits of the range of pages displayed.
* While getOffsetByPageId() returns the offset of the data within the
* current page, this method returns the offsets of the page numbers interval.
* E.g., if you have pageId=5 and delta=2, it will return (3, 7).
* PageID of 9 would give you (4, 8).
* If the method is called without parameter, pageID is set to currentPage#.
* @param integer PageID to get offsets for
* @return array First and last offsets
$pageid = isset ($pageid) ? (int) $pageid : $this->_currentPage;
if (!isset ($this->_pageData)) {
$this->_generatePageData ();
if (isset ($this->_pageData[$pageid]) || is_null($this->_itemData)) {
$min_surplus = ($pageid <= $this->_delta) ? ($this->_delta - $pageid + 1 ) : 0;
$max_surplus = ($pageid >= ($this->_totalPages - $this->_delta)) ?
($pageid - ($this->_totalPages - $this->_delta)) : 0;
$min_surplus = $max_surplus = 0;
max($pageid - $this->_delta - $max_surplus, 1 ),
min($pageid + $this->_delta + $min_surplus, $this->_totalPages)
* Returns back/next/first/last and page links,
* both as ordered and associative array.
* @param integer $pageID Optional pageID. If specified, links
* for that page are provided instead of current one.
* @return array back/pages/next/first/last/all links
$_sav = $this->_currentPage;
$this->_currentPage = $pageID;
if ($this->_totalPages > (2 * $this->_delta + 1 )) {
$this->links .= $this->_printFirstPage ();
$this->links .= $this->_getBackLink ();
$this->links .= $this->_getPageLinks ();
$this->links .= $this->_getNextLink ();
if ($this->_totalPages > (2 * $this->_delta + 1 )) {
$this->links .= $this->_printLastPage ();
$back = str_replace(' ', '', $this->_getBackLink ());
$next = str_replace(' ', '', $this->_getNextLink ());
$pages = $this->_getPageLinks ();
$first = $this->_printFirstPage ();
$last = $this->_printLastPage ();
$this->_currentPage = $_sav;
function _getPageLinks ($url = '')
//legacy setting... the preferred way to set an option now
//is adding it to the constuctor
//If there's only one page, don't display links
if ($this->_clearIfVoid && ($this->_totalPages < 2 )) {
if ($this->_totalPages > (2 * $this->_delta + 1 )) {
if (($this->_totalPages - $this->_delta) <= $this->_currentPage) {
$expansion_before = $this->_currentPage - ($this->_totalPages - $this->_delta);
for ($i = $this->_currentPage - $this->_delta - $expansion_before; $expansion_before; $expansion_before-- , $i++ ) {
$print_separator_flag = ($i != $this->_currentPage + $this->_delta); // && ($i != $this->_totalPages - 1)
$this->range[$i] = false;
$this->_linkData[$this->_urlVar] = $i;
$links .= $this->_renderLink ($this->_altPage. ' '. $i, $i)
. ($print_separator_flag ? $this->_separator. $this->_spacesAfter : '');
for ($i = $this->_currentPage - $this->_delta; ($i <= $this->_currentPage + $this->_delta) && ($i <= $this->_totalPages); $i++ ) {
// check when to print separator
$print_separator_flag = (($i != $this->_currentPage + $this->_delta) && ($i != $this->_totalPages));
if ($i == $this->_currentPage) {
$links .= $this->_curPageSpanPre . $i . $this->_curPageSpanPost;
$this->range[$i] = false;
$this->_linkData[$this->_urlVar] = $i;
$links .= $this->_renderLink ($this->_altPage. ' '. $i, $i);
$links .= $this->_spacesBefore
. ($print_separator_flag ? $this->_separator. $this->_spacesAfter : '');
if ($this->_expanded && $expansion_after) {
$links .= $this->_separator . $this->_spacesAfter;
for ($i = $this->_currentPage + $this->_delta +1; $expansion_after; $expansion_after-- , $i++ ) {
$print_separator_flag = ($expansion_after != 1 );
$this->range[$i] = false;
$this->_linkData[$this->_urlVar] = $i;
$links .= $this->_renderLink ($this->_altPage. ' '. $i, $i)
. ($print_separator_flag ? $this->_separator. $this->_spacesAfter : '');
//if $this->_totalPages <= (2*Delta+1) show them all
for ($i=1; $i<= $this->_totalPages; $i++ ) {
if ($i != $this->_currentPage) {
$this->range[$i] = false;
$this->_linkData[$this->_urlVar] = $i;
$links .= $this->_renderLink ($this->_altPage. ' '. $i, $i);
$links .= $this->_curPageSpanPre . $i . $this->_curPageSpanPost;
$links .= $this->_spacesBefore
. (($i != $this->_totalPages) ? $this->_separator. $this->_spacesAfter : '');
Documentation generated on Sun, 29 Jul 2007 10:30:10 -0400 by phpDocumentor 1.4.0. PEAR Logo Copyright © PHP Group 2004.
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