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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Contains the Pager_Sliding 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.alberton@quipo.it>
* @copyright 2003-2008 Lorenzo Alberton
* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
* @version CVS: $Id: Sliding.php,v 1.18 2008/01/06 13:36:22 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
*
* @category HTML
* @package Pager
* @author Lorenzo Alberton <l.alberton@quipo.it>
* @copyright 2003-2008 Lorenzo Alberton
* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
* @link http://pear.php.net/package/Pager
*/
class Pager_Sliding extends Pager_Common
{
// {{{ Pager_Sliding()
/**
* Constructor
*
* @param array $options Associative array of option names and their values
*
* @access public
*/
function Pager_Sliding($options = array())
{
//set default Pager_Sliding options
$this->_delta = 2;
$this->_prevImg = '«';
$this->_nextImg = '»';
$this->_separator = '|';
$this->_spacesBeforeSeparator = 3;
$this->_spacesAfterSeparator = 3;
$this->_curPageSpanPre = '<b>';
$this->_curPageSpanPost = '</b>';
//set custom options
$err = $this->setOptions($options);
if ($err !== PAGER_OK) {
return $this->raiseError($this->errorMessage($err), $err);
}
$this->build();
}
// }}}
// {{{ getPageIdByOffset()
/**
* "Overload" PEAR::Pager method. VOID. Not needed here...
*
* @param integer $index Offset to get pageID for
*
* @return void
* @deprecated
* @access public
*/
function getPageIdByOffset($index)
{
}
// }}}
// {{{ 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 $pageid PageID to get offsets for
*
* @return array First and last offsets
* @access public
*/
function getPageRangeByPageId($pageid = null)
{
$pageid = isset($pageid) ? (int)$pageid : $this->_currentPage;
if (!isset($this->_pageData)) {
$this->_generatePageData();
}
if (isset($this->_pageData[$pageid]) || is_null($this->_itemData)) {
if ($this->_expanded) {
$min_surplus = ($pageid <= $this->_delta) ? ($this->_delta - $pageid + 1) : 0;
$max_surplus = ($pageid >= ($this->_totalPages - $this->_delta)) ?
($pageid - ($this->_totalPages - $this->_delta)) : 0;
} else {
$min_surplus = $max_surplus = 0;
}
return array(
max($pageid - $this->_delta - $max_surplus, 1),
min($pageid + $this->_delta + $min_surplus, $this->_totalPages)
);
}
return array(0, 0);
}
// }}}
// {{{ getLinks()
/**
* 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.
* @param string $dummy used to comply with parent signature (leave empty)
*
* @return array back/pages/next/first/last/all links
* @access public
*/
function getLinks($pageID = null, $dummy='')
{
if (!is_null($pageID)) {
$_sav = $this->_currentPage;
$this->_currentPage = $pageID;
$this->links = '';
if ($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();
$all = $this->links;
$linkTags = $this->linkTags;
$linkTagsRaw = $this->linkTagsRaw;
if (!is_null($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,
'linkTagsRaw' => $linkTagsRaw,
);
}
// }}}
// {{{ _getPageLinks()
/**
* Returns pages link
*
* @param string $url URL string [deprecated]
*
* @return string Links
* @access private
*/
function _getPageLinks($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 '';
}
$links = '';
if ($this->_totalPages > (2 * $this->_delta + 1)) {
if ($this->_expanded) {
if (($this->_totalPages - $this->_delta) <= $this->_currentPage) {
$expansion_before = $this->_currentPage - ($this->_totalPages - $this->_delta);
} else {
$expansion_before = 0;
}
for ($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(str_replace('%d', $i, $this->_altPage), $i)
. $this->_spacesBefore
. ($print_separator_flag ? $this->_separator.$this->_spacesAfter : '');
}
}
$expansion_after = 0;
for ($i = $this->_currentPage - $this->_delta; ($i <= $this->_currentPage + $this->_delta) && ($i <= $this->_totalPages); $i++) {
if ($i < 1) {
++$expansion_after;
continue;
}
// check when to print separator
$print_separator_flag = (($i != $this->_currentPage + $this->_delta) && ($i != $this->_totalPages));
if ($i == $this->_currentPage) {
$this->range[$i] = true;
$links .= $this->_curPageSpanPre . $i . $this->_curPageSpanPost;
} else {
$this->range[$i] = false;
$this->_linkData[$this->_urlVar] = $i;
$links .= $this->_renderLink(str_replace('%d', $i, $this->_altPage), $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(str_replace('%d', $i, $this->_altPage), $i)
. $this->_spacesBefore
. ($print_separator_flag ? $this->_separator.$this->_spacesAfter : '');
}
}
} else {
//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(str_replace('%d', $i, $this->_altPage), $i);
} else {
$this->range[$i] = true;
$links .= $this->_curPageSpanPre . $i . $this->_curPageSpanPost;
}
$links .= $this->_spacesBefore
. (($i != $this->_totalPages) ? $this->_separator.$this->_spacesAfter : '');
}
}
return $links;
}
// }}}
}
?>
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