implemented Render_PageLinks().
Please note, this class is entirely unsupported,
and no free support requests except for bug reports
will be entertained by the author.
*/
class ADODB_Pager {
var $id; // unique id for pager (defaults to 'adodb')
var $db; // ADODB connection object
var $sql; // sql used
var $rs; // recordset generated
var $curr_page; // current page number before Render() called, calculated in constructor
var $rows; // number of rows per page
var $linksPerPage=10; // number of links per page in navigation bar
var $showPageLinks;
var $gridAttributes = 'width=100% border=1 bgcolor=white';
// Localize text strings here
var $first = '|<';
var $prev = '<<';
var $next = '>>';
var $last = '>|';
var $moreLinks = '...';
var $startLinks = '...';
var $gridHeader = false;
var $htmlSpecialChars = true;
var $page = 'Page';
var $linkSelectedColor = 'red';
var $cache = 0; #secs to cache with CachePageExecute()
//----------------------------------------------
// constructor
//
// $db adodb connection object
// $sql sql statement
// $id optional id to identify which pager,
// if you have multiple on 1 page.
// $id should be only be [a-z0-9]*
//
function __construct(&$db,$sql,$id = 'adodb', $showPageLinks = false)
{
global $PHP_SELF;
$curr_page = $id.'_curr_page';
if (!empty($PHP_SELF)) $PHP_SELF = htmlspecialchars($_SERVER['PHP_SELF']); // htmlspecialchars() to prevent XSS attacks
$this->sql = $sql;
$this->id = $id;
$this->db = $db;
$this->showPageLinks = $showPageLinks;
$next_page = $id.'_next_page';
if (isset($_GET[$next_page])) {
$_SESSION[$curr_page] = (integer) $_GET[$next_page];
}
if (empty($_SESSION[$curr_page])) $_SESSION[$curr_page] = 1; ## at first page
$this->curr_page = $_SESSION[$curr_page];
}
//---------------------------
// Display link to first page
function Render_First($anchor=true)
{
global $PHP_SELF;
if ($anchor) {
?>
first;?>
first ";
}
}
//--------------------------
// Display link to next page
function render_next($anchor=true)
{
global $PHP_SELF;
if ($anchor) {
?>
next;?>
next ";
}
}
//------------------
// Link to last page
//
// for better performance with large recordsets, you can set
// $this->db->pageExecuteCountRows = false, which disables
// last page counting.
function render_last($anchor=true)
{
global $PHP_SELF;
if (!$this->db->pageExecuteCountRows) return;
if ($anchor) {
?>
last;?>
last ";
}
}
//---------------------------------------------------
// original code by "Pablo Costa"
function render_pagelinks()
{
global $PHP_SELF;
$pages = $this->rs->LastPageNo();
$linksperpage = $this->linksPerPage ? $this->linksPerPage : $pages;
for($i=1; $i <= $pages; $i+=$linksperpage)
{
if($this->rs->AbsolutePage() >= $i)
{
$start = $i;
}
}
$numbers = '';
$end = $start+$linksperpage-1;
$link = $this->id . "_next_page";
if($end > $pages) $end = $pages;
if ($this->startLinks && $start > 1) {
$pos = $start - 1;
$numbers .= "$this->startLinks ";
}
for($i=$start; $i <= $end; $i++) {
if ($this->rs->AbsolutePage() == $i)
$numbers .= "linkSelectedColor>$i ";
else
$numbers .= "$i ";
}
if ($this->moreLinks && $end < $pages)
$numbers .= "$this->moreLinks ";
print $numbers . ' ';
}
// Link to previous page
function render_prev($anchor=true)
{
global $PHP_SELF;
if ($anchor) {
?>
prev;?>
prev ";
}
}
//--------------------------------------------------------
// Simply rendering of grid. You should override this for
// better control over the format of the grid
//
// We use output buffering to keep code clean and readable.
function RenderGrid()
{
global $gSQLBlockRows; // used by rs2html to indicate how many rows to display
include_once(ADODB_DIR.'/tohtml.inc.php');
ob_start();
$gSQLBlockRows = $this->rows;
rs2html($this->rs,$this->gridAttributes,$this->gridHeader,$this->htmlSpecialChars);
$s = ob_get_contents();
ob_end_clean();
return $s;
}
//-------------------------------------------------------
// Navigation bar
//
// we use output buffering to keep the code easy to read.
function RenderNav()
{
ob_start();
if (!$this->rs->AtFirstPage()) {
$this->Render_First();
$this->Render_Prev();
} else {
$this->Render_First(false);
$this->Render_Prev(false);
}
if ($this->showPageLinks){
$this->Render_PageLinks();
}
if (!$this->rs->AtLastPage()) {
$this->Render_Next();
$this->Render_Last();
} else {
$this->Render_Next(false);
$this->Render_Last(false);
}
$s = ob_get_contents();
ob_end_clean();
return $s;
}
//-------------------
// This is the footer
function RenderPageCount()
{
if (!$this->db->pageExecuteCountRows) return '';
$lastPage = $this->rs->LastPageNo();
if ($lastPage == -1) $lastPage = 1; // check for empty rs.
if ($this->curr_page > $lastPage) $this->curr_page = 1;
return "$this->page ".$this->curr_page."/".$lastPage."";
}
//-----------------------------------
// Call this class to draw everything.
function Render($rows=10)
{
global $ADODB_COUNTRECS;
$this->rows = $rows;
if ($this->db->dataProvider == 'informix') $this->db->cursorType = IFX_SCROLL;
$savec = $ADODB_COUNTRECS;
if ($this->db->pageExecuteCountRows) $ADODB_COUNTRECS = true;
if ($this->cache)
$rs = $this->db->CachePageExecute($this->cache,$this->sql,$rows,$this->curr_page);
else
$rs = $this->db->PageExecute($this->sql,$rows,$this->curr_page);
$ADODB_COUNTRECS = $savec;
$this->rs = $rs;
if (!$rs) {
print "Query failed: $this->sql
";
return;
}
if (!$rs->EOF && (!$rs->AtFirstPage() || !$rs->AtLastPage()))
$header = $this->RenderNav();
else
$header = " ";
$grid = $this->RenderGrid();
$footer = $this->RenderPageCount();
$this->RenderLayout($header,$grid,$footer);
$rs->Close();
$this->rs = false;
}
//------------------------------------------------------
// override this to control overall layout and formatting
function RenderLayout($header,$grid,$footer,$attributes='border=1 bgcolor=beige')
{
echo "| ",
$header,
" |
| ",
$grid,
" |
| ",
$footer,
" |
";
}
}