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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_Jumping 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 dot alberton at quipo dot it>
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 * @author     Richard Heyes <richard@phpguru.org>,
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 * @copyright  2003-2006 Lorenzo Alberton, Richard Heyes
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 * @license    http://www.debian.org/misc/bsd.license  BSD License (3 Clause)
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 * @version    CVS: $Id: Jumping.php,v 1.2 2007-11-06 10:54:04 jp_milcent 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_Jumping - Generic data paging class  ("jumping window" style)
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 * Handles paging a set of data. For usage see the example.php provided.
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 *
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 * @category   HTML
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 * @package    Pager
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 * @author     Lorenzo Alberton <l dot alberton at quipo dot it>
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 * @author     Richard Heyes <richard@phpguru.org>,
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 * @copyright  2003-2005 Lorenzo Alberton, Richard Heyes
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 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
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 * @link       http://pear.php.net/package/Pager
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 */
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class Pager_Jumping extends Pager_Common
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{
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    // {{{ Pager_Jumping()
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    /**
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     * Constructor
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     *
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     * @param array $options    An associative array of option names
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     *                          and their values
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     * @access public
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     */
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    function Pager_Jumping($options = array())
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    {
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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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     * Returns pageID for given offset
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     *
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     * @param $index Offset to get pageID for
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     * @return int PageID for given offset
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     */
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    function getPageIdByOffset($index)
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    {
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        if (!isset($this->_pageData)) {
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            $this->_generatePageData();
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        }
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92
        if (($index % $this->_perPage) > 0) {
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            $pageID = ceil((float)$index / (float)$this->_perPage);
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        } else {
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            $pageID = $index / $this->_perPage;
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        }
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        return $pageID;
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    }
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    // }}}
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    // {{{ getPageRangeByPageId()
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    /**
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     * Given a PageId, it returns the limits of the range of pages displayed.
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     * While getOffsetByPageId() returns the offset of the data within the
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     * current page, this method returns the offsets of the page numbers interval.
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     * E.g., if you have pageId=3 and delta=10, it will return (1, 10).
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     * PageID of 8 would give you (1, 10) as well, because 1 <= 8 <= 10.
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     * PageID of 11 would give you (11, 20).
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     * If the method is called without parameter, pageID is set to currentPage#.
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     *
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     * @param integer PageID to get offsets for
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     * @return array  First and last offsets
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     * @access public
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     */
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    function getPageRangeByPageId($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[$pageid]) || is_null($this->_itemData)) {
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            // I'm sure I'm missing something here, but this formula works
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            // so I'm using it until I find something simpler.
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            $start = ((($pageid + (($this->_delta - ($pageid % $this->_delta))) % $this->_delta) / $this->_delta) - 1) * $this->_delta +1;
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            return array(
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                max($start, 1),
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                min($start+$this->_delta-1, $this->_totalPages)
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            );
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        } else {
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            return array(0, 0);
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        }
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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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     * NB: in original PEAR::Pager this method accepted two parameters,
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     * $back_html and $next_html. Now the only parameter accepted is
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     * an integer ($pageID), since the html text for prev/next links can
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     * be set in the constructor. If a second parameter is provided, then
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     * the method act as it previously did. This hack's only purpose is to
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     * mantain backward compatibility.
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     *
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     * @param integer $pageID Optional pageID. If specified, links
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     *                for that page are provided instead of current one.
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     *                [ADDED IN NEW PAGER VERSION]
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     * @param  string $next_html HTML to put inside the next link
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     *                [deprecated: use the constructor instead]
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     * @return array Back/pages/next links
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     */
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    function getLinks($pageID=null, $next_html='')
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    {
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        //BC hack
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        if (!empty($next_html)) {
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            $back_html = $pageID;
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            $pageID    = null;
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        } else {
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            $back_html = '';
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        }
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163
        if (!is_null($pageID)) {
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            $this->links = '';
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            if ($this->_totalPages > $this->_delta) {
166
                $this->links .= $this->_printFirstPage();
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            }
168
 
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            $_sav = $this->_currentPage;
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            $this->_currentPage = $pageID;
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172
            $this->links .= $this->_getBackLink('', $back_html);
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            $this->links .= $this->_getPageLinks();
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            $this->links .= $this->_getNextLink('', $next_html);
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            if ($this->_totalPages > $this->_delta) {
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                $this->links .= $this->_printLastPage();
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            }
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        }
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        $back  = str_replace('&nbsp;', '', $this->_getBackLink());
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        $next  = str_replace('&nbsp;', '', $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 = $this->linkTags;
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188
        if (!is_null($pageID)) {
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            $this->_currentPage = $_sav;
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        }
191
 
192
        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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        );
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    }
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210
    // }}}
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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 $url  URL to use in the link
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     *              [deprecated: use the constructor instead]
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     * @return string Links
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     * @access private
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     */
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    function _getPageLinks($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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        }
233
 
234
        $links = '';
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        $limits = $this->getPageRangeByPageId($this->_currentPage);
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237
        for ($i=$limits[0]; $i<=min($limits[1], $this->_totalPages); $i++) {
238
            if ($i != $this->_currentPage) {
239
                $this->range[$i] = false;
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                $this->_linkData[$this->_urlVar] = $i;
241
                $links .= $this->_renderLink($this->_altPage.' '.$i, $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 : '');
248
        }
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        return $links;
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    }
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252
    // }}}
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}
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?>