File Source for Jumping.php

<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Contains the Pager_Jumping class
*
* PHP versions 4 and 5
*
* 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.
*
* @category HTML
* @package Pager
* @author Lorenzo Alberton <l dot alberton at quipo dot it>
* @author Richard Heyes <richard@phpguru.org>,
* @copyright 2003-2006 Lorenzo Alberton, Richard Heyes
* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
* @version CVS: $Id: Jumping.php 9608 2006-10-20 11:43:03Z bmol $
* @link http://pear.php.net/package/Pager
*/
/**
* require PEAR::Pager_Common base class
*/
require_once 'Pager/Common.php';
/**
* Pager_Jumping - Generic data paging class ("jumping window" style)
* Handles paging a set of data. For usage see the example.php provided.
*
* @category HTML
* @package Pager
* @author Lorenzo Alberton <l dot alberton at quipo dot it>
* @author Richard Heyes <richard@phpguru.org>,
* @copyright 2003-2005 Lorenzo Alberton, Richard Heyes
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @link http://pear.php.net/package/Pager
*/
class Pager_Jumping extends Pager_Common
{
// {{{ Pager_Jumping()
/**
* Constructor
*
* @param array $options An associative array of option names
* and their values
* @access public
*/
function Pager_Jumping($options = array())
{
$err = $this->setOptions($options);
if ($err !== PAGER_OK) {
return $this->raiseError($this->errorMessage($err), $err);
}
$this->build();
}
// }}}
// {{{ build()
/**
* Generate or refresh the links and paged data after a call to setOptions()
*
* @access public
*/
function build()
{
//reset
$this->_pageData = array();
$this->links = '';
$this->_generatePageData();
$this->_setFirstLastText();
$this->links .= $this->_getBackLink();
$this->links .= $this->_getPageLinks();
$this->links .= $this->_getNextLink();
$this->linkTags .= $this->_getFirstLinkTag();
$this->linkTags .= $this->_getPrevLinkTag();
$this->linkTags .= $this->_getNextLinkTag();
$this->linkTags .= $this->_getLastLinkTag();
}
// }}}
// {{{ getPageIdByOffset()
/**
* Returns pageID for given offset
*
* @param $index Offset to get pageID for
* @return int PageID for given offset
*/
function getPageIdByOffset($index)
{
if (!isset($this->_pageData)) {
$this->_generatePageData();
}
if (($index % $this->_perPage) > 0) {
$pageID = ceil((float)$index / (float)$this->_perPage);
} else {
$pageID = $index / $this->_perPage;
}
return $pageID;
}
// }}}
// {{{ getPageRangeByPageId()
/**
* Given a PageId, it returns the limits of the range of pages displayed.
* While getOffsetByPageId() returns the offset of the data within the
* current page, this method returns the offsets of the page numbers interval.
* E.g., if you have pageId=3 and delta=10, it will return (1, 10).
* PageID of 8 would give you (1, 10) as well, because 1 <= 8 <= 10.
* PageID of 11 would give you (11, 20).
* If the method is called without parameter, pageID is set to currentPage#.
*
* @param integer PageID to get offsets for
* @return array First and last offsets
* @access public
*/
function getPageRangeByPageId($pageid = null)
{
$pageid = isset($pageid) ? (int)$pageid : $this->_currentPage;
if (isset($this->_pageData[$pageid]) || is_null($this->_itemData)) {
// I'm sure I'm missing something here, but this formula works
// so I'm using it until I find something simpler.
$start = ((($pageid + (($this->_delta - ($pageid % $this->_delta))) % $this->_delta) / $this->_delta) - 1) * $this->_delta +1;
return array(
max($start, 1),
min($start+$this->_delta-1, $this->_totalPages)
);
} else {
return array(0, 0);
}
}
// }}}
// {{{ getLinks()
/**
* Returns back/next/first/last and page links,
* both as ordered and associative array.
*
* NB: in original PEAR::Pager this method accepted two parameters,
* $back_html and $next_html. Now the only parameter accepted is
* an integer ($pageID), since the html text for prev/next links can
* be set in the constructor. If a second parameter is provided, then
* the method act as it previously did. This hack's only purpose is to
* mantain backward compatibility.
*
* @param integer $pageID Optional pageID. If specified, links
* for that page are provided instead of current one.
* [ADDED IN NEW PAGER VERSION]
* @param string $next_html HTML to put inside the next link
* [deprecated: use the constructor instead]
* @return array Back/pages/next links
*/
function getLinks($pageID=null, $next_html='')
{
//BC hack
if (!empty($next_html)) {
$back_html = $pageID;
$pageID = null;
} else {
$back_html = '';
}
if (!is_null($pageID)) {
$_sav = $this->_currentPage;
$this->_currentPage = $pageID;
$this->links = '';
if ($this->_totalPages > $this->_delta) {
$this->links .= $this->_printFirstPage();
}
$this->links .= $this->_getBackLink('', $back_html);
$this->links .= $this->_getPageLinks();
$this->links .= $this->_getNextLink('', $next_html);
if ($this->_totalPages > $this->_delta) {
$this->links .= $this->_printLastPage();
}
}
$back = str_replace(' ', '', $this->_getBackLink());
$next = str_replace(' ', '', $this->_getNextLink());
$pages = $this->_getPageLinks();
$first = $this->_printFirstPage();
$last = $this->_printLastPage();
$all = $this->links;
$linkTags = $this->linkTags;
if (!is_null($pageID)) {
$this->_currentPage = $_sav;
}
return array(
$back,
$pages,
trim($next),
$first,
$last,
$all,
$linkTags,
'back' => $back,
'pages' => $pages,
'next' => $next,
'first' => $first,
'last' => $last,
'all' => $all,
'linktags' => $linkTags
);
}
// }}}
// {{{ _getPageLinks()
/**
* Returns pages link
*
* @param $url URL to use in the link
* [deprecated: use the constructor instead]
* @return string Links
* @access private
*/
function _getPageLinks($url = '')
{
//legacy setting... the preferred way to set an option now
//is adding it to the constuctor
if (!empty($url)) {
$this->_path = $url;
}
//If there's only one page, don't display links
if ($this->_clearIfVoid && ($this->_totalPages < 2)) {
return '';
}
$links = '';
$limits = $this->getPageRangeByPageId($this->_currentPage);
for ($i=$limits[0]; $i<=min($limits[1], $this->_totalPages); $i++) {
if ($i != $this->_currentPage) {
$this->range[$i] = false;
$this->_linkData[$this->_urlVar] = $i;
$links .= $this->_renderLink($this->_altPage.' '.$i, $i);
} else {
$this->range[$i] = true;
$links .= $this->_curPageSpanPre . $i . $this->_curPageSpanPost;
}
$links .= $this->_spacesBefore
. (($i != $this->_totalPages) ? $this->_separator.$this->_spacesAfter : '');
}
return $links;
}
// }}}
}
?>

Source for file Jumping.php