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Fit text to cell
InformationsAuthor: Patrick Benny
License: Freeware
DescriptionThis method is an extension of Cell() allowing to output text with either character spacing
or horizontal scaling.
CellFit(float w [, float h [, string txt [, mixed border [, int ln [, string align [, int fill [, mixed link [, int scale [, int force]]]]]]]]])
The first 8 parameters are the same as Cell(). The additional parameters are:
scale
0 = character spacing
1 = horizontal scaling
force
0 = only space/scale if necessary (not when text is short enough to fit)
1 = always space/scale
The following four methods are also provided for convenience, allowing all combinations of
scale/force, and using only the 8 parameters of Cell():
CellFitScale()
CellFitScaleForce()
CellFitSpace()
CellFitSpaceForce()
Source
<?php
require('fpdf.php');
class FPDF_CellFit extends FPDF {
//Cell with horizontal scaling if text is too wide
function CellFit($w, $h=0, $txt='', $border=0, $ln=0, $align='', $fill=0, $link='', $scale=0, $force=1)
{
//Get string width
$str_width=$this->GetStringWidth($txt);
//Calculate ratio to fit cell
if($w==0)
$w=$this->w-$this->rMargin-$this->x;
$ratio=($w-$this->cMargin*2)/$str_width;
$fit=($ratio < 1 || ($ratio > 1 && $force == 1));
if ($fit)
{
switch ($scale)
{
//Character spacing
case 0:
//Calculate character spacing in points
$char_space=($w-$this->cMargin*2-$str_width)/max($this->MBGetStringLength($txt)-1, 1)*$this->k;
//Set character spacing
$this->_out(sprintf('BT %.2f Tc ET', $char_space));
break;
//Horizontal scaling
case 1:
//Calculate horizontal scaling
$horiz_scale=$ratio*100.0;
//Set horizontal scaling
$this->_out(sprintf('BT %.2f Tz ET', $horiz_scale));
break;
}
//Override user alignment (since text will fill up cell)
$align='';
}
//Pass on to Cell method
$this->Cell($w, $h, $txt, $border, $ln, $align, $fill, $link);
//Reset character spacing/horizontal scaling
if ($fit)
$this->_out('BT '.($scale==0 ? '0 Tc' : '100 Tz').' ET');
}
//Cell with horizontal scaling only if necessary
function CellFitScale($w, $h=0, $txt='', $border=0, $ln=0, $align='', $fill=0, $link='')
{
$this->CellFit($w, $h, $txt, $border, $ln, $align, $fill, $link, 1, 0);
}
//Cell with horizontal scaling always
function CellFitScaleForce($w, $h=0, $txt='', $border=0, $ln=0, $align='', $fill=0, $link='')
{
$this->CellFit($w, $h, $txt, $border, $ln, $align, $fill, $link, 1, 1);
}
//Cell with character spacing only if necessary
function CellFitSpace($w, $h=0, $txt='', $border=0, $ln=0, $align='', $fill=0, $link='')
{
$this->CellFit($w, $h, $txt, $border, $ln, $align, $fill, $link, 0, 0);
}
//Cell with character spacing always
function CellFitSpaceForce($w, $h=0, $txt='', $border=0, $ln=0, $align='', $fill=0, $link='')
{
//Same as calling CellFit directly
$this->CellFit($w, $h, $txt, $border, $ln, $align, $fill, $link, 0, 1);
}
//Patch to also work with CJK double-byte text
function MBGetStringLength($s)
{
if($this->CurrentFont['type']=='Type0')
{
$len = 0;
$nbbytes = strlen($s);
for ($i = 0; $i < $nbbytes; $i++)
{
if (ord($s[$i])<128)
$len++;
else
{
$len++;
$i++;
}
}
return $len;
}
else
return strlen($s);
}
}
?>
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Example
<?php
define('FPDF_FONTPATH', 'font/');
require('cellfit.php');
$txt_short='This text is short enough.';
$txt_long='This text is way too long.';
for ($i = 1; $i <= 2; $i++)
$txt_long.=' '.$txt_long;
$pdf = new FPDF_CellFit();
$pdf->AddPage();
$pdf->SetFillColor(0xff, 0xff, 0x99);
$pdf->SetFont('Arial', 'B', 16);
$pdf->Write(10, 'Cell');
$pdf->SetFont('');
$pdf->Ln();
$pdf->Cell(0, 10, $txt_short, 1, 1);
$pdf->Cell(0, 10, $txt_long, 1, 1);
$pdf->Ln();
$pdf->Line($pdf->x, $pdf->y, $pdf->w-$pdf->x-$pdf->rMargin, $pdf->y);
$pdf->Ln();
$pdf->SetFont('', 'B');
$pdf->Write(10, 'CellFitScale');
$pdf->SetFont('');
$pdf->Write(10, ' (horizontal scaling only if necessary)');
$pdf->Ln();
$pdf->CellFitScale(0, 10, $txt_short, 1, 1);
$pdf->CellFitScale(0, 10, $txt_long, 1, 1, '', 1);
$pdf->Ln();
$pdf->SetFont('', 'B');
$pdf->Write(10, 'CellFitScaleForce');
$pdf->SetFont('');
$pdf->Write(10, ' (horizontal scaling always)');
$pdf->Ln();
$pdf->CellFitScaleForce(0, 10, $txt_short, 1, 1, '', 1);
$pdf->CellFitScaleForce(0, 10, $txt_long, 1, 1, '', 1);
$pdf->Ln();
$pdf->Line($pdf->x, $pdf->y, $pdf->w-$pdf->x-$pdf->rMargin, $pdf->y);
$pdf->Ln();
$pdf->SetFont('', 'B');
$pdf->Write(10, 'CellFitSpace');
$pdf->SetFont('');
$pdf->Write(10, ' (character spacing only if necessary)');
$pdf->Ln();
$pdf->CellFitSpace(0, 10, $txt_short, 1, 1);
$pdf->CellFitSpace(0, 10, $txt_long, 1, 1, '', 1);
$pdf->Ln();
$pdf->SetFont('', 'B');
$pdf->Write(10, 'CellFitSpaceForce');
$pdf->SetFont('');
$pdf->Write(10, ' (character spacing always)');
$pdf->Ln();
$pdf->CellFitSpaceForce(0, 10, $txt_short, 1, 1, '', 1);
$pdf->CellFitSpaceForce(0, 10, $txt_long, 1, 1, '', 1);
$pdf->Output();
?>
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