* @author Richard Heyes , * @copyright 2003-2006 Lorenzo Alberton, Richard Heyes * @license http://www.debian.org/misc/bsd.license BSD License (3 Clause) * @version CVS: $Id$ * @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 * @author Richard Heyes , * @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(); } // }}} // {{{ 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)) { $this->links = ''; if ($this->_totalPages > $this->_delta) { $this->links .= $this->_printFirstPage(); } $_sav = $this->_currentPage; $this->_currentPage = $pageID; $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; } // }}} } ?>