<?php
/*
********************************************************
TinyButStrong plug-in: ByPage (requires TBS >= 3.1.0)
Version 1.0.5, on 2006-10-26, by Skrol29
********************************************************
*/
define('TBS_BYPAGE','tbsByPage');
class tbsByPage {
function OnInstall() {
$this->Version = '1.0.5';
$this->PageSize = 0;
return array('OnCommand','BeforeMergeBlock','AfterMergeBlock');
}
function OnCommand($PageSize,$PageNum=0,$RecKnown=0) {
// Activate ByPage Mode
$this->PageSize = $PageSize;
$this->PageNum = $PageNum;
$this->RecKnown = $RecKnown;
$this->RecNbr = 0;
}
function BeforeMergeBlock(&$TplSource,&$BlockBeg,&$BlockEnd,$PrmLst,&$Src) {
if ($this->PageSize<=0) return; // ByPage Mode not actived
if (isset($Src->ByPage)) return; // ByPage Mode already processed for the current Data source
if ($Src->RecSet===false) return; // No data available
if ($Src->RecSaved) {
// Data is an array
$this->RecNbr = count($Src->RecSet);
if ($this->PageNum==-1) { // Last record
$Reminder = $this->RecNbr % $this->PageSize;
if ($Reminder==0) $Reminder = $this->PageSize;
$Src->RecNumInit = $this->RecNbr - $Reminder;
} else {
$Src->RecNumInit = ($this->PageNum-1) * $this->PageSize;
}
$Src->RecSet = array_slice($Src->RecSet, $Src->RecNumInit, $this->PageSize);
$Src->RecNbr = $Src->RecNumInit + count($Src->RecSet);
} else {
// Data is not an array => read records, saving the last page in $this->RecBuffer
if ($this->PageNum==-1) {
$RecStop = -1;
} else {
$RecStop = $this->PageNum * $this->PageSize;
}
// Init internal buffer
unset($Src->RecBuffer);
$Src->RecSaving = true;
// Read records
$Src->RecBuffer = array();
$RecNum = 0;
$Modulo = 0;
$ModuloStop = $this->PageSize + 1;
while (($Src->CurrRec!==false) and ($RecNum!==$RecStop)) {
$Src->DataFetch(); // Updates $Src->RecBuffer
if ($Src->CurrRec!==false) {
$Modulo++;
$RecNum++;
if ($Modulo===$ModuloStop) {
$Src->RecBuffer = array($Src->RecKey => $Src->CurrRec);
$Src->RecNumInit += $this->PageSize;
$Modulo = 1;
}
}
}
// Retreiveing the number of records
$this->RecNbr = $RecNum;
if ($this->RecKnown==-1) {
$Src->RecSaving = false;
while ($Src->CurrRec!==false) {
$Src->DataFetch();
if ($Src->CurrRec!==false) $this->RecNbr++;
}
$Src->RecSaving = true;
}
$Src->DataClose(); // Close the real recordset source
}
$x = '';
$Src->DataOpen($x); // Read first record, like it is done by TBS before calling this method
// Deactivate ByPage Mode
$this->PageSize = 0;
$Src->ByPage = true;
}
function AfterMergeBlock(&$Buffer,&$Src) {
if (!isset($Src->ByPage)) return;
if ($this->RecKnown==-1) $Src->RecNum = $this->RecNbr;
}
}
?>
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