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<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* Contains the Pager_Sliding class
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*
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* PHP versions 4 and 5
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*
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* LICENSE: Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* @category HTML
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* @package Pager
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* @author Lorenzo Alberton <l.alberton@quipo.it>
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* @copyright 2003-2008 Lorenzo Alberton
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* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
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* @version CVS: $Id: Sliding.php,v 1.18 2008/01/06 13:36:22 quipo Exp $
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* @link http://pear.php.net/package/Pager
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*/
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/**
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* require PEAR::Pager_Common base class
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*/
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require_once 'Pager/Common.php';
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/**
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* Pager_Sliding - Generic data paging class ("sliding window" style)
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* Usage examples can be found in the PEAR manual
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*
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* @category HTML
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* @package Pager
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* @author Lorenzo Alberton <l.alberton@quipo.it>
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* @copyright 2003-2008 Lorenzo Alberton
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* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
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* @link http://pear.php.net/package/Pager
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*/
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class Pager_Sliding extends Pager_Common
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{
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// {{{ Pager_Sliding()
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/**
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* Constructor
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*
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* @param array $options Associative array of option names and their values
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*
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* @access public
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*/
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function Pager_Sliding($options = array())
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{
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//set default Pager_Sliding options
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$this->_delta = 2;
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$this->_prevImg = '«';
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$this->_nextImg = '»';
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$this->_separator = '|';
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$this->_spacesBeforeSeparator = 3;
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$this->_spacesAfterSeparator = 3;
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$this->_curPageSpanPre = '<b>';
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$this->_curPageSpanPost = '</b>';
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//set custom options
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$err = $this->setOptions($options);
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if ($err !== PAGER_OK) {
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return $this->raiseError($this->errorMessage($err), $err);
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}
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$this->build();
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}
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// }}}
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// {{{ getPageIdByOffset()
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/**
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* "Overload" PEAR::Pager method. VOID. Not needed here...
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*
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* @param integer $index Offset to get pageID for
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*
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* @return void
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* @deprecated
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* @access public
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*/
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function getPageIdByOffset($index)
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{
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}
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// }}}
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// {{{ getPageRangeByPageId()
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/**
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* Given a PageId, it returns the limits of the range of pages displayed.
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* While getOffsetByPageId() returns the offset of the data within the
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* current page, this method returns the offsets of the page numbers interval.
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* E.g., if you have pageId=5 and delta=2, it will return (3, 7).
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* PageID of 9 would give you (4, 8).
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* If the method is called without parameter, pageID is set to currentPage#.
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*
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* @param integer $pageid PageID to get offsets for
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*
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* @return array First and last offsets
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* @access public
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*/
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function getPageRangeByPageId($pageid = null)
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{
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$pageid = isset($pageid) ? (int)$pageid : $this->_currentPage;
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if (!isset($this->_pageData)) {
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$this->_generatePageData();
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}
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if (isset($this->_pageData[$pageid]) || is_null($this->_itemData)) {
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if ($this->_expanded) {
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$min_surplus = ($pageid <= $this->_delta) ? ($this->_delta - $pageid + 1) : 0;
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$max_surplus = ($pageid >= ($this->_totalPages - $this->_delta)) ?
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($pageid - ($this->_totalPages - $this->_delta)) : 0;
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} else {
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$min_surplus = $max_surplus = 0;
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}
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return array(
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max($pageid - $this->_delta - $max_surplus, 1),
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min($pageid + $this->_delta + $min_surplus, $this->_totalPages)
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);
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}
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return array(0, 0);
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}
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// }}}
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// {{{ getLinks()
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/**
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* Returns back/next/first/last and page links,
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* both as ordered and associative array.
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*
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* @param integer $pageID Optional pageID. If specified, links for that page
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* are provided instead of current one.
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* @param string $dummy used to comply with parent signature (leave empty)
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*
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* @return array back/pages/next/first/last/all links
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* @access public
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*/
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function getLinks($pageID = null, $dummy='')
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{
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if (!is_null($pageID)) {
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$_sav = $this->_currentPage;
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$this->_currentPage = $pageID;
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$this->links = '';
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if ($this->_totalPages > (2 * $this->_delta + 1)) {
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$this->links .= $this->_printFirstPage();
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}
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$this->links .= $this->_getBackLink();
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$this->links .= $this->_getPageLinks();
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$this->links .= $this->_getNextLink();
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if ($this->_totalPages > (2 * $this->_delta + 1)) {
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$this->links .= $this->_printLastPage();
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}
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}
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$back = str_replace(' ', '', $this->_getBackLink());
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$next = str_replace(' ', '', $this->_getNextLink());
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$pages = $this->_getPageLinks();
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$first = $this->_printFirstPage();
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$last = $this->_printLastPage();
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$all = $this->links;
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$linkTags = $this->linkTags;
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$linkTagsRaw = $this->linkTagsRaw;
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if (!is_null($pageID)) {
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$this->_currentPage = $_sav;
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}
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return array(
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$back,
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$pages,
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trim($next),
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$first,
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$last,
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$all,
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$linkTags,
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'back' => $back,
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'pages' => $pages,
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'next' => $next,
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'first' => $first,
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'last' => $last,
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'all' => $all,
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'linktags' => $linkTags,
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'linkTagsRaw' => $linkTagsRaw,
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);
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}
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// }}}
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// {{{ _getPageLinks()
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/**
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* Returns pages link
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*
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* @param string $url URL string [deprecated]
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*
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* @return string Links
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* @access private
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*/
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function _getPageLinks($url = '')
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{
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//legacy setting... the preferred way to set an option now
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//is adding it to the constuctor
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if (!empty($url)) {
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$this->_path = $url;
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}
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//If there's only one page, don't display links
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if ($this->_clearIfVoid && ($this->_totalPages < 2)) {
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return '';
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}
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$links = '';
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if ($this->_totalPages > (2 * $this->_delta + 1)) {
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if ($this->_expanded) {
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if (($this->_totalPages - $this->_delta) <= $this->_currentPage) {
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$expansion_before = $this->_currentPage - ($this->_totalPages - $this->_delta);
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} else {
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$expansion_before = 0;
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}
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for ($i = $this->_currentPage - $this->_delta - $expansion_before; $expansion_before; $expansion_before--, $i++) {
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$print_separator_flag = ($i != $this->_currentPage + $this->_delta); // && ($i != $this->_totalPages - 1)
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$this->range[$i] = false;
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$this->_linkData[$this->_urlVar] = $i;
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$links .= $this->_renderLink(str_replace('%d', $i, $this->_altPage), $i)
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. $this->_spacesBefore
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. ($print_separator_flag ? $this->_separator.$this->_spacesAfter : '');
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}
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}
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$expansion_after = 0;
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for ($i = $this->_currentPage - $this->_delta; ($i <= $this->_currentPage + $this->_delta) && ($i <= $this->_totalPages); $i++) {
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if ($i < 1) {
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++$expansion_after;
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continue;
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}
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// check when to print separator
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$print_separator_flag = (($i != $this->_currentPage + $this->_delta) && ($i != $this->_totalPages));
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if ($i == $this->_currentPage) {
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$this->range[$i] = true;
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$links .= $this->_curPageSpanPre . $i . $this->_curPageSpanPost;
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} else {
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$this->range[$i] = false;
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$this->_linkData[$this->_urlVar] = $i;
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$links .= $this->_renderLink(str_replace('%d', $i, $this->_altPage), $i);
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}
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$links .= $this->_spacesBefore
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. ($print_separator_flag ? $this->_separator.$this->_spacesAfter : '');
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}
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if ($this->_expanded && $expansion_after) {
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$links .= $this->_separator . $this->_spacesAfter;
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for ($i = $this->_currentPage + $this->_delta +1; $expansion_after; $expansion_after--, $i++) {
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$print_separator_flag = ($expansion_after != 1);
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$this->range[$i] = false;
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$this->_linkData[$this->_urlVar] = $i;
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$links .= $this->_renderLink(str_replace('%d', $i, $this->_altPage), $i)
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. $this->_spacesBefore
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. ($print_separator_flag ? $this->_separator.$this->_spacesAfter : '');
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}
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}
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} else {
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//if $this->_totalPages <= (2*Delta+1) show them all
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for ($i=1; $i<=$this->_totalPages; $i++) {
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if ($i != $this->_currentPage) {
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$this->range[$i] = false;
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$this->_linkData[$this->_urlVar] = $i;
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$links .= $this->_renderLink(str_replace('%d', $i, $this->_altPage), $i);
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} else {
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$this->range[$i] = true;
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$links .= $this->_curPageSpanPre . $i . $this->_curPageSpanPost;
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}
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$links .= $this->_spacesBefore
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. (($i != $this->_totalPages) ? $this->_separator.$this->_spacesAfter : '');
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}
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}
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return $links;
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}
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// }}}
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}
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?>
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