Documentation TYPO3 par Ameos

adodb-pager.inc.php

00001 <?php
00002 
00003 /*
00004         V4.93 10 Oct 2006  (c) 2000-2006 John Lim (jlim#natsoft.com.my). All rights reserved.
00005           Released under both BSD license and Lesser GPL library license. 
00006           Whenever there is any discrepancy between the two licenses, 
00007           the BSD license will take precedence. 
00008           Set tabs to 4 for best viewing.
00009 
00010         This class provides recordset pagination with 
00011         First/Prev/Next/Last links. 
00012         
00013         Feel free to modify this class for your own use as
00014         it is very basic. To learn how to use it, see the 
00015         example in adodb/tests/testpaging.php.
00016         
00017         "Pablo Costa" <pablo@cbsp.com.br> implemented Render_PageLinks().
00018         
00019         Please note, this class is entirely unsupported, 
00020         and no free support requests except for bug reports
00021         will be entertained by the author.
00022 
00023 */
00024 class ADODB_Pager {
00025         var $id;        // unique id for pager (defaults to 'adodb')
00026         var $db;        // ADODB connection object
00027         var $sql;       // sql used
00028         var $rs;        // recordset generated
00029         var $curr_page; // current page number before Render() called, calculated in constructor
00030         var $rows;              // number of rows per page
00031     var $linksPerPage=10; // number of links per page in navigation bar
00032     var $showPageLinks; 
00033 
00034         var $gridAttributes = 'width=100% border=1 bgcolor=white';
00035         
00036         // Localize text strings here
00037         var $first = '<code>|&lt;</code>';
00038         var $prev = '<code>&lt;&lt;</code>';
00039         var $next = '<code>>></code>';
00040         var $last = '<code>>|</code>';
00041         var $moreLinks = '...';
00042         var $startLinks = '...';
00043         var $gridHeader = false;
00044         var $htmlSpecialChars = true;
00045         var $page = 'Page';
00046         var $linkSelectedColor = 'red';
00047         var $cache = 0;  #secs to cache with CachePageExecute()
00048         
00049         //----------------------------------------------
00050         // constructor
00051         //
00052         // $db  adodb connection object
00053         // $sql sql statement
00054         // $id  optional id to identify which pager, 
00055         //              if you have multiple on 1 page. 
00056         //              $id should be only be [a-z0-9]*
00057         //
00058         function ADODB_Pager(&$db,$sql,$id = 'adodb', $showPageLinks = false)
00059         {
00060         global $PHP_SELF;
00061         
00062                 $curr_page = $id.'_curr_page';
00063                 if (empty($PHP_SELF)) $PHP_SELF = htmlspecialchars($_SERVER['PHP_SELF']); // htmlspecialchars() to prevent XSS attacks
00064                 
00065                 $this->sql = $sql;
00066                 $this->id = $id;
00067                 $this->db = $db;
00068                 $this->showPageLinks = $showPageLinks;
00069                 
00070                 $next_page = $id.'_next_page';  
00071                 
00072                 if (isset($_GET[$next_page])) {
00073                         $_SESSION[$curr_page] = (integer) $_GET[$next_page];
00074                 }
00075                 if (empty($_SESSION[$curr_page])) $_SESSION[$curr_page] = 1; ## at first page
00076                 
00077                 $this->curr_page = $_SESSION[$curr_page];
00078                 
00079         }
00080         
00081         //---------------------------
00082         // Display link to first page
00083         function Render_First($anchor=true)
00084         {
00085         global $PHP_SELF;
00086                 if ($anchor) {
00087         ?>
00088                 <a href="<?php echo $PHP_SELF,'?',$this->id;?>_next_page=1"><?php echo $this->first;?></a> &nbsp; 
00089         <?php
00090                 } else {
00091                         print "$this->first &nbsp; ";
00092                 }
00093         }
00094         
00095         //--------------------------
00096         // Display link to next page
00097         function render_next($anchor=true)
00098         {
00099         global $PHP_SELF;
00100         
00101                 if ($anchor) {
00102                 ?>
00103                 <a href="<?php echo $PHP_SELF,'?',$this->id,'_next_page=',$this->rs->AbsolutePage() + 1 ?>"><?php echo $this->next;?></a> &nbsp; 
00104                 <?php
00105                 } else {
00106                         print "$this->next &nbsp; ";
00107                 }
00108         }
00109         
00110         //------------------
00111         // Link to last page
00112         // 
00113         // for better performance with large recordsets, you can set
00114         // $this->db->pageExecuteCountRows = false, which disables
00115         // last page counting.
00116         function render_last($anchor=true)
00117         {
00118         global $PHP_SELF;
00119         
00120                 if (!$this->db->pageExecuteCountRows) return;
00121                 
00122                 if ($anchor) {
00123                 ?>
00124                         <a href="<?php echo $PHP_SELF,'?',$this->id,'_next_page=',$this->rs->LastPageNo() ?>"><?php echo $this->last;?></a> &nbsp; 
00125                 <?php
00126                 } else {
00127                         print "$this->last &nbsp; ";
00128                 }
00129         }
00130         
00131         //---------------------------------------------------
00132         // original code by "Pablo Costa" <pablo@cbsp.com.br> 
00133         function render_pagelinks()
00134         {
00135         global $PHP_SELF;
00136             $pages        = $this->rs->LastPageNo();
00137             $linksperpage = $this->linksPerPage ? $this->linksPerPage : $pages;
00138             for($i=1; $i <= $pages; $i+=$linksperpage)
00139             {
00140                 if($this->rs->AbsolutePage() >= $i)
00141                 {
00142                     $start = $i;
00143                 }
00144             }
00145                         $numbers = '';
00146             $end = $start+$linksperpage-1;
00147                         $link = $this->id . "_next_page";
00148             if($end > $pages) $end = $pages;
00149                         
00150                         
00151                         if ($this->startLinks && $start > 1) {
00152                                 $pos = $start - 1;
00153                                 $numbers .= "<a href=$PHP_SELF?$link=$pos>$this->startLinks</a>  ";
00154             } 
00155                         
00156                         for($i=$start; $i <= $end; $i++) {
00157                 if ($this->rs->AbsolutePage() == $i)
00158                     $numbers .= "<font color=$this->linkSelectedColor><b>$i</b></font>  ";
00159                 else 
00160                      $numbers .= "<a href=$PHP_SELF?$link=$i>$i</a>  ";
00161             
00162             }
00163                         if ($this->moreLinks && $end < $pages) 
00164                                 $numbers .= "<a href=$PHP_SELF?$link=$i>$this->moreLinks</a>  ";
00165             print $numbers . ' &nbsp; ';
00166         }
00167         // Link to previous page
00168         function render_prev($anchor=true)
00169         {
00170         global $PHP_SELF;
00171                 if ($anchor) {
00172         ?>
00173                 <a href="<?php echo $PHP_SELF,'?',$this->id,'_next_page=',$this->rs->AbsolutePage() - 1 ?>"><?php echo $this->prev;?></a> &nbsp; 
00174         <?php 
00175                 } else {
00176                         print "$this->prev &nbsp; ";
00177                 }
00178         }
00179         
00180         //--------------------------------------------------------
00181         // Simply rendering of grid. You should override this for
00182         // better control over the format of the grid
00183         //
00184         // We use output buffering to keep code clean and readable.
00185         function RenderGrid()
00186         {
00187         global $gSQLBlockRows; // used by rs2html to indicate how many rows to display
00188                 include_once(ADODB_DIR.'/tohtml.inc.php');
00189                 ob_start();
00190                 $gSQLBlockRows = $this->rows;
00191                 rs2html($this->rs,$this->gridAttributes,$this->gridHeader,$this->htmlSpecialChars);
00192                 $s = ob_get_contents();
00193                 ob_end_clean();
00194                 return $s;
00195         }
00196         
00197         //-------------------------------------------------------
00198         // Navigation bar
00199         //
00200         // we use output buffering to keep the code easy to read.
00201         function RenderNav()
00202         {
00203                 ob_start();
00204                 if (!$this->rs->AtFirstPage()) {
00205                         $this->Render_First();
00206                         $this->Render_Prev();
00207                 } else {
00208                         $this->Render_First(false);
00209                         $this->Render_Prev(false);
00210                 }
00211         if ($this->showPageLinks){
00212             $this->Render_PageLinks();
00213         }
00214                 if (!$this->rs->AtLastPage()) {
00215                         $this->Render_Next();
00216                         $this->Render_Last();
00217                 } else {
00218                         $this->Render_Next(false);
00219                         $this->Render_Last(false);
00220                 }
00221                 $s = ob_get_contents();
00222                 ob_end_clean();
00223                 return $s;
00224         }
00225         
00226         //-------------------
00227         // This is the footer
00228         function RenderPageCount()
00229         {
00230                 if (!$this->db->pageExecuteCountRows) return '';
00231                 $lastPage = $this->rs->LastPageNo();
00232                 if ($lastPage == -1) $lastPage = 1; // check for empty rs.
00233                 if ($this->curr_page > $lastPage) $this->curr_page = 1;
00234                 return "<font size=-1>$this->page ".$this->curr_page."/".$lastPage."</font>";
00235         }
00236         
00237         //-----------------------------------
00238         // Call this class to draw everything.
00239         function Render($rows=10)
00240         {
00241         global $ADODB_COUNTRECS;
00242         
00243                 $this->rows = $rows;
00244                 
00245                 if ($this->db->dataProvider == 'informix') $this->db->cursorType = IFX_SCROLL;
00246                 
00247                 $savec = $ADODB_COUNTRECS;
00248                 if ($this->db->pageExecuteCountRows) $ADODB_COUNTRECS = true;
00249                 if ($this->cache)
00250                         $rs = &$this->db->CachePageExecute($this->cache,$this->sql,$rows,$this->curr_page);
00251                 else
00252                         $rs = &$this->db->PageExecute($this->sql,$rows,$this->curr_page);
00253                 $ADODB_COUNTRECS = $savec;
00254                 
00255                 $this->rs = &$rs;
00256                 if (!$rs) {
00257                         print "<h3>Query failed: $this->sql</h3>";
00258                         return;
00259                 }
00260                 
00261                 if (!$rs->EOF && (!$rs->AtFirstPage() || !$rs->AtLastPage())) 
00262                         $header = $this->RenderNav();
00263                 else
00264                         $header = "&nbsp;";
00265                 
00266                 $grid = $this->RenderGrid();
00267                 $footer = $this->RenderPageCount();
00268                 
00269                 $this->RenderLayout($header,$grid,$footer);
00270                 
00271                 $rs->Close();
00272                 $this->rs = false;
00273         }
00274         
00275         //------------------------------------------------------
00276         // override this to control overall layout and formating
00277         function RenderLayout($header,$grid,$footer,$attributes='border=1 bgcolor=beige')
00278         {
00279                 echo "<table ".$attributes."><tr><td>",
00280                                 $header,
00281                         "</td></tr><tr><td>",
00282                                 $grid,
00283                         "</td></tr><tr><td>",
00284                                 $footer,
00285                         "</td></tr></table>";
00286         }
00287 }
00288 
00289 
00290 ?>


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