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287 lines
7.9 KiB
PHP
287 lines
7.9 KiB
PHP
<?php
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/*
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V4.52 10 Aug 2004 (c) 2000-2004 John Lim (jlim@natsoft.com.my). All rights reserved.
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Released under both BSD license and Lesser GPL library license.
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Whenever there is any discrepancy between the two licenses,
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the BSD license will take precedence.
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Set tabs to 4 for best viewing.
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This class provides recordset pagination with
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First/Prev/Next/Last links.
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Feel free to modify this class for your own use as
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it is very basic. To learn how to use it, see the
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example in adodb/tests/testpaging.php.
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"Pablo Costa" <pablo@cbsp.com.br> implemented Render_PageLinks().
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Please note, this class is entirely unsupported,
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and no free support requests except for bug reports
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will be entertained by the author.
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*/
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class ADODB_Pager {
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var $id; // unique id for pager (defaults to 'adodb')
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var $db; // ADODB connection object
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var $sql; // sql used
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var $rs; // recordset generated
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var $curr_page; // current page number before Render() called, calculated in constructor
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var $rows; // number of rows per page
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var $linksPerPage=10; // number of links per page in navigation bar
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var $showPageLinks;
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var $gridAttributes = 'width=100% border=1 bgcolor=white';
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// Localize text strings here
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var $first = '<code>|<</code>';
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var $prev = '<code><<</code>';
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var $next = '<code>>></code>';
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var $last = '<code>>|</code>';
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var $moreLinks = '...';
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var $startLinks = '...';
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var $gridHeader = false;
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var $htmlSpecialChars = true;
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var $page = 'Page';
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var $linkSelectedColor = 'red';
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var $cache = 0; #secs to cache with CachePageExecute()
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//----------------------------------------------
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// constructor
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//
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// $db adodb connection object
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// $sql sql statement
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// $id optional id to identify which pager,
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// if you have multiple on 1 page.
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// $id should be only be [a-z0-9]*
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//
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function ADODB_Pager(&$db,$sql,$id = 'adodb', $showPageLinks = false)
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{
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global $HTTP_SERVER_VARS,$PHP_SELF,$HTTP_SESSION_VARS,$HTTP_GET_VARS;
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$curr_page = $id.'_curr_page';
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if (empty($PHP_SELF)) $PHP_SELF = $HTTP_SERVER_VARS['PHP_SELF'];
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$this->sql = $sql;
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$this->id = $id;
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$this->db = $db;
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$this->showPageLinks = $showPageLinks;
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$next_page = $id.'_next_page';
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if (isset($HTTP_GET_VARS[$next_page])) {
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$HTTP_SESSION_VARS[$curr_page] = $HTTP_GET_VARS[$next_page];
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}
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if (empty($HTTP_SESSION_VARS[$curr_page])) $HTTP_SESSION_VARS[$curr_page] = 1; ## at first page
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$this->curr_page = $HTTP_SESSION_VARS[$curr_page];
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}
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//---------------------------
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// Display link to first page
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function Render_First($anchor=true)
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{
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global $PHP_SELF;
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if ($anchor) {
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?>
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<a href="<?php echo $PHP_SELF,'?',$this->id;?>_next_page=1"><?php echo $this->first;?></a>
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<?php
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} else {
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print "$this->first ";
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}
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}
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//--------------------------
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// Display link to next page
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function render_next($anchor=true)
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{
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global $PHP_SELF;
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if ($anchor) {
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?>
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<a href="<?php echo $PHP_SELF,'?',$this->id,'_next_page=',$this->rs->AbsolutePage() + 1 ?>"><?php echo $this->next;?></a>
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<?php
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} else {
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print "$this->next ";
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}
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}
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//------------------
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// Link to last page
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//
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// for better performance with large recordsets, you can set
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// $this->db->pageExecuteCountRows = false, which disables
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// last page counting.
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function render_last($anchor=true)
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{
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global $PHP_SELF;
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if (!$this->db->pageExecuteCountRows) return;
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if ($anchor) {
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?>
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<a href="<?php echo $PHP_SELF,'?',$this->id,'_next_page=',$this->rs->LastPageNo() ?>"><?php echo $this->last;?></a>
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<?php
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} else {
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print "$this->last ";
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}
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}
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//---------------------------------------------------
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// original code by "Pablo Costa" <pablo@cbsp.com.br>
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function render_pagelinks()
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{
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global $PHP_SELF;
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$pages = $this->rs->LastPageNo();
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$linksperpage = $this->linksPerPage ? $this->linksPerPage : $pages;
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for($i=1; $i <= $pages; $i+=$linksperpage)
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{
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if($this->rs->AbsolutePage() >= $i)
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{
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$start = $i;
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}
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}
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$numbers = '';
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$end = $start+$linksperpage-1;
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$link = $this->id . "_next_page";
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if($end > $pages) $end = $pages;
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if ($this->startLinks && $start > 1) {
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$pos = $start - 1;
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$numbers .= "<a href=$PHP_SELF?$link=$pos>$this->startLinks</a> ";
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}
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for($i=$start; $i <= $end; $i++) {
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if ($this->rs->AbsolutePage() == $i)
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$numbers .= "<font color=$this->linkSelectedColor><b>$i</b></font> ";
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else
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$numbers .= "<a href=$PHP_SELF?$link=$i>$i</a> ";
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}
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if ($this->moreLinks && $end < $pages)
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$numbers .= "<a href=$PHP_SELF?$link=$i>$this->moreLinks</a> ";
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print $numbers . ' ';
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}
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// Link to previous page
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function render_prev($anchor=true)
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{
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global $PHP_SELF;
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if ($anchor) {
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?>
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<a href="<?php echo $PHP_SELF,'?',$this->id,'_next_page=',$this->rs->AbsolutePage() - 1 ?>"><?php echo $this->prev;?></a>
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<?php
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} else {
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print "$this->prev ";
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}
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}
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//--------------------------------------------------------
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// Simply rendering of grid. You should override this for
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// better control over the format of the grid
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//
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// We use output buffering to keep code clean and readable.
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function RenderGrid()
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{
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global $gSQLBlockRows; // used by rs2html to indicate how many rows to display
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include_once(ADODB_DIR.'/tohtml.inc.php');
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ob_start();
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$gSQLBlockRows = $this->rows;
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rs2html($this->rs,$this->gridAttributes,$this->gridHeader,$this->htmlSpecialChars);
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$s = ob_get_contents();
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ob_end_clean();
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return $s;
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}
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//-------------------------------------------------------
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// Navigation bar
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//
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// we use output buffering to keep the code easy to read.
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function RenderNav()
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{
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ob_start();
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if (!$this->rs->AtFirstPage()) {
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$this->Render_First();
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$this->Render_Prev();
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} else {
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$this->Render_First(false);
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$this->Render_Prev(false);
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}
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if ($this->showPageLinks){
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$this->Render_PageLinks();
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}
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if (!$this->rs->AtLastPage()) {
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$this->Render_Next();
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$this->Render_Last();
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} else {
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$this->Render_Next(false);
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$this->Render_Last(false);
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}
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$s = ob_get_contents();
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ob_end_clean();
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return $s;
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}
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//-------------------
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// This is the footer
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function RenderPageCount()
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{
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if (!$this->db->pageExecuteCountRows) return '';
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$lastPage = $this->rs->LastPageNo();
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if ($lastPage == -1) $lastPage = 1; // check for empty rs.
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if ($this->curr_page > $lastPage) $this->curr_page = 1;
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return "<font size=-1>$this->page ".$this->curr_page."/".$lastPage."</font>";
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}
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//-----------------------------------
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// Call this class to draw everything.
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function Render($rows=10)
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{
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global $ADODB_COUNTRECS;
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$this->rows = $rows;
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$savec = $ADODB_COUNTRECS;
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if ($this->db->pageExecuteCountRows) $ADODB_COUNTRECS = true;
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if ($this->cache)
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$rs = &$this->db->CachePageExecute($this->cache,$this->sql,$rows,$this->curr_page);
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else
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$rs = &$this->db->PageExecute($this->sql,$rows,$this->curr_page);
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$ADODB_COUNTRECS = $savec;
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$this->rs = &$rs;
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if (!$rs) {
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print "<h3>Query failed: $this->sql</h3>";
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return;
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}
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if (!$rs->EOF && (!$rs->AtFirstPage() || !$rs->AtLastPage()))
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$header = $this->RenderNav();
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else
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$header = " ";
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$grid = $this->RenderGrid();
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$footer = $this->RenderPageCount();
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$rs->Close();
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$this->rs = false;
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$this->RenderLayout($header,$grid,$footer);
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}
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//------------------------------------------------------
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// override this to control overall layout and formating
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function RenderLayout($header,$grid,$footer,$attributes='border=1 bgcolor=beige')
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{
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echo "<table ".$attributes."><tr><td>",
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$header,
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"</td></tr><tr><td>",
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$grid,
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"</td></tr><tr><td>",
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$footer,
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"</td></tr></table>";
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}
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}
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?>
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