<?php
/*******************************************************************************
* Software: UFPDF, Unicode Free PDF generator                                  *
* Version:  0.1                                                                *
*           based on FPDF 1.52 by Olivier PLATHEY                              *
* Date:     2004-09-01                                                         *
* Author:   Steven Wittens <steven@acko.net>                                   *
* License:  GPL                                                                *
*                                                                              *
* UFPDF is a modification of FPDF to support Unicode through UTF-8.            *
*                                                                              *
*******************************************************************************/

if(!class_exists('UFPDF'))
{
define('UFPDF_VERSION','0.1');

include_once 'fpdf.php';

class UFPDF extends FPDF
{

/*******************************************************************************
*                                                                              *
*                               Public methods                                 *
*                                                                              *
*******************************************************************************/
function UFPDF($orientation='P',$unit='mm',$format='A4')
{
  FPDF::FPDF($orientation, $unit, $format);
}

    function GetStringWidth($s)
    {
      //Get width of a string in the current font
      $s = (string)$s;
      $codepoints=$this->utf8_to_codepoints($s);
      $cw=&$this->CurrentFont['cw'];
      $w=0;
      foreach($codepoints as $cp)
        $w+=$cw[$cp];
      return $w*$this->FontSize/1000;
    }

    function AddFont($family,$style='',$file='')
    {
      //Add a TrueType or Type1 font
      $family=strtolower($family);
      if($family=='arial')
        $family='helvetica';
      $style=strtoupper($style);
      if($style=='IB')
        $style='BI';
      if(isset($this->fonts[$family.$style]))
        $this->Error('Font already added: '.$family.' '.$style);
      if($file=='')
        $file=str_replace(' ','',$family).strtolower($style).'.php';
      if(defined('FPDF_FONTPATH'))
        $file=FPDF_FONTPATH.$file;
      include($file);
      if(!isset($name))
        $this->Error('Could not include font definition file 1');
      $i=count($this->fonts)+1;
      $this->fonts[$family.$style]=array('i'=>$i,'type'=>$type,'name'=>$name,'desc'=>$desc,'up'=>$up,'ut'=>$ut,'cw'=>$cw,'file'=>$file,'ctg'=>$ctg);
      if($file)
      {
        if($type=='TrueTypeUnicode')
          $this->FontFiles[$file]=array('length1'=>$originalsize);
        else
          $this->FontFiles[$file]=array('length1'=>$size1,'length2'=>$size2);
      }
    }

    function Text($x,$y,$txt)
    {
      //Output a string
      $s=sprintf('BT %.2f %.2f Td %s Tj ET',$x*$this->k,($this->h-$y)*$this->k,$this->_escapetext($txt));
      if($this->underline and $txt!='')
        $s.=' '.$this->_dounderline($x,$y,$this->GetStringWidth($txt),$txt);
      if($this->ColorFlag)
        $s='q '.$this->TextColor.' '.$s.' Q';
      $this->_out($s);
    }

    function AcceptPageBreak()
    {
      //Accept automatic page break or not
      return $this->AutoPageBreak;
    }

    function Cell($w,$h=0,$txt='',$border=0,$ln=0,$align='',$fill=0,$link='')
    {
      //Output a cell
      $k=$this->k;
      if($this->y+$h>$this->PageBreakTrigger and !$this->InFooter and $this->AcceptPageBreak())
      {
        //Automatic page break
        $x=$this->x;
        $ws=$this->ws;
        if($ws>0)
        {
          $this->ws=0;
          $this->_out('0 Tw');
        }
        $this->AddPage($this->CurOrientation);
        $this->x=$x;
        if($ws>0)
        {
          $this->ws=$ws;
          $this->_out(sprintf('%.3f Tw',$ws*$k));
        }
      }
      if($w==0)
        $w=$this->w-$this->rMargin-$this->x;
      $s='';
      if($fill==1 or $border==1)
      {
        if($fill==1)
          $op=($border==1) ? 'B' : 'f';
        else
          $op='S';
        $s=sprintf('%.2f %.2f %.2f %.2f re %s ',$this->x*$k,($this->h-$this->y)*$k,$w*$k,-$h*$k,$op);
      }
      if(is_string($border))
      {
        $x=$this->x;
        $y=$this->y;
        if(is_int(strpos($border,'L')))
          $s.=sprintf('%.2f %.2f m %.2f %.2f l S ',$x*$k,($this->h-$y)*$k,$x*$k,($this->h-($y+$h))*$k);
        if(is_int(strpos($border,'T')))
          $s.=sprintf('%.2f %.2f m %.2f %.2f l S ',$x*$k,($this->h-$y)*$k,($x+$w)*$k,($this->h-$y)*$k);
        if(is_int(strpos($border,'R')))
          $s.=sprintf('%.2f %.2f m %.2f %.2f l S ',($x+$w)*$k,($this->h-$y)*$k,($x+$w)*$k,($this->h-($y+$h))*$k);
        if(is_int(strpos($border,'B')))
          $s.=sprintf('%.2f %.2f m %.2f %.2f l S ',$x*$k,($this->h-($y+$h))*$k,($x+$w)*$k,($this->h-($y+$h))*$k);
      }
      if($txt!='')
      {
        $width = $this->GetStringWidth($txt);
        if($align=='R')
          $dx=$w-$this->cMargin-$width;
        elseif($align=='C')
          $dx=($w-$width)/2;
        else
          $dx=$this->cMargin;
        if($this->ColorFlag)
          $s.='q '.$this->TextColor.' ';
        $txtstring=$this->_escapetext($txt);
        $s.=sprintf('BT %.2f %.2f Td %s Tj ET',($this->x+$dx)*$k,($this->h-($this->y+.5*$h+.3*$this->FontSize))*$k,$txtstring);
        if($this->underline)
          $s.=' '.$this->_dounderline($this->x+$dx,$this->y+.5*$h+.3*$this->FontSize,$width,$txt);
        if($this->ColorFlag)
          $s.=' Q';
        if($link)
          $this->Link($this->x+$dx,$this->y+.5*$h-.5*$this->FontSize,$width,$this->FontSize,$link);
      }
      if($s)
        $this->_out($s);
      $this->lasth=$h;
      if($ln>0)
      {
        //Go to next line
        $this->y+=$h;
        if($ln==1)
          $this->x=$this->lMargin;
      }
      else
        $this->x+=$w;
    }

    /*******************************************************************************
    *                                                                              *
    *                              Protected methods                               *
    *                                                                              *
    *******************************************************************************/

    function _puttruetypeunicode($font) {
      //Type0 Font
      $this->_newobj();
      $this->_out('<</Type /Font');
      $this->_out('/Subtype /Type0');
      $this->_out('/BaseFont /'. $font['name'] .'-UCS');
      $this->_out('/Encoding /Identity-H');
      $this->_out('/DescendantFonts ['. ($this->n + 1) .' 0 R]');
      $this->_out('>>');
      $this->_out('endobj');

      //CIDFont
      $this->_newobj();
      $this->_out('<</Type /Font');
      $this->_out('/Subtype /CIDFontType2');
      $this->_out('/BaseFont /'. $font['name']);
      $this->_out('/CIDSystemInfo <</Registry (Adobe) /Ordering (UCS) /Supplement 0>>');
      $this->_out('/FontDescriptor '. ($this->n + 1) .' 0 R');
      $c = 0;
      foreach ($font['cw'] as $i => $w) {
        $widths .= $i .' ['. $w.'] ';
      }
      $this->_out('/W ['. $widths .']');
      $this->_out('/CIDToGIDMap '. ($this->n + 2) .' 0 R');
      $this->_out('>>');
      $this->_out('endobj');

      //Font descriptor
      $this->_newobj();
      $this->_out('<</Type /FontDescriptor');
      $this->_out('/FontName /'.$font['name']);
      foreach ($font['desc'] as $k => $v) {
        $s .= ' /'. $k .' '. $v;
      }
      if ($font['file']) {
		    $s .= ' /FontFile2 '. $this->FontFiles[$font['file']]['n'] .' 0 R';
      }
      $this->_out($s);
      $this->_out('>>');
      $this->_out('endobj');

      //Embed CIDToGIDMap
      $this->_newobj();
      if(defined('FPDF_FONTPATH'))
        $file=FPDF_FONTPATH.$font['ctg'];
      else
        $file=$font['ctg'];
      $size=filesize($file);
      if(!$size)
        $this->Error('Font file not found');
      $this->_out('<</Length '.$size);
	    if(substr($file,-2) == '.z')
        $this->_out('/Filter /FlateDecode');
      $this->_out('>>');
      $f = fopen($file,'rb');
      $this->_putstream(fread($f,$size));
      fclose($f);
      $this->_out('endobj');
    }

    function _dounderline($x,$y,$width,$txt)
    {
      //Underline text
      $up=$this->CurrentFont['up'];
      $ut=$this->CurrentFont['ut'];
      $w=$width+$this->ws*substr_count($txt,' ');
      return sprintf('%.2f %.2f %.2f %.2f re f',$x*$this->k,($this->h-($y-$up/1000*$this->FontSize))*$this->k,$w*$this->k,-$ut/1000*$this->FontSizePt);
    }

    function _textstring($s)
    {
      //Convert to UTF-16BE
      $s = $this->utf8_to_utf16be($s);
      //Escape necessary characters
      return '('. strtr($s, array(')' => '\\)', '(' => '\\(', '\\' => '\\\\')) .')';
    }

    function _escapetext($s)
    {
      //Convert to UTF-16BE
      $s = $this->utf8_to_utf16be($s, false);
      //Escape necessary characters
      return '('. strtr($s, array(')' => '\\)', '(' => '\\(', '\\' => '\\\\')) .')';
    }

    function _putinfo()
    {
	    $this->_out('/Producer '.$this->_textstring('UFPDF '. UFPDF_VERSION));
	    if(!empty($this->title))
		    $this->_out('/Title '.$this->_textstring($this->title));
	    if(!empty($this->subject))
		    $this->_out('/Subject '.$this->_textstring($this->subject));
	    if(!empty($this->author))
		    $this->_out('/Author '.$this->_textstring($this->author));
	    if(!empty($this->keywords))
		    $this->_out('/Keywords '.$this->_textstring($this->keywords));
	    if(!empty($this->creator))
		    $this->_out('/Creator '.$this->_textstring($this->creator));
	    $this->_out('/CreationDate '.$this->_textstring('D:'.date('YmdHis')));
    }

    // UTF-8 to UTF-16BE conversion.
    // Correctly handles all illegal UTF-8 sequences.
    function utf8_to_utf16be(&$txt, $bom = true) {
      $l = strlen($txt);
      $out = $bom ? "\xFE\xFF" : '';
      for ($i = 0; $i < $l; ++$i) {
        $c = ord($txt{$i});
        // ASCII
        if ($c < 0x80) {
          $out .= "\x00". $txt{$i};
        }
        // Lost continuation byte
        else if ($c < 0xC0) {
          $out .= "\xFF\xFD";
          continue;
        }
        // Multibyte sequence leading byte
        else {
          if ($c < 0xE0) {
            $s = 2;
          }
          else if ($c < 0xF0) {
            $s = 3;
          }
          else if ($c < 0xF8) {
            $s = 4;
          }
          // 5/6 byte sequences not possible for Unicode.
          else {
            $out .= "\xFF\xFD";
            while (ord($txt{$i + 1}) >= 0x80 && ord($txt{$i + 1}) < 0xC0) { ++$i; }
            continue;
          }
          
          $q = array($c);
          // Fetch rest of sequence
          while (ord($txt{$i + 1}) >= 0x80 && ord($txt{$i + 1}) < 0xC0) { ++$i; $q[] = ord($txt{$i}); }
          
          // Check length
          if (count($q) != $s) {
            $out .= "\xFF\xFD";        
            continue;
          }
          
          switch ($s) {
            case 2:
              $cp = (($q[0] ^ 0xC0) << 6) | ($q[1] ^ 0x80);
              // Overlong sequence
              if ($cp < 0x80) {
                $out .= "\xFF\xFD";        
              }
              else {
                $out .= chr($cp >> 8);
                $out .= chr($cp & 0xFF);
              }
              continue;

            case 3:
              $cp = (($q[0] ^ 0xE0) << 12) | (($q[1] ^ 0x80) << 6) | ($q[2] ^ 0x80);
              // Overlong sequence
              if ($cp < 0x800) {
                $out .= "\xFF\xFD";        
              }
              // Check for UTF-8 encoded surrogates (caused by a bad UTF-8 encoder)
              else if ($c > 0xD800 && $c < 0xDFFF) {
                $out .= "\xFF\xFD";
              }
              else {
                $out .= chr($cp >> 8);
                $out .= chr($cp & 0xFF);
              }
              continue;

            case 4:
              $cp = (($q[0] ^ 0xF0) << 18) | (($q[1] ^ 0x80) << 12) | (($q[2] ^ 0x80) << 6) | ($q[3] ^ 0x80);
              // Overlong sequence
              if ($cp < 0x10000) {
                $out .= "\xFF\xFD";
              }
              // Outside of the Unicode range
              else if ($cp >= 0x10FFFF) {
                $out .= "\xFF\xFD";            
              }
              else {
                // Use surrogates
                $cp -= 0x10000;
                $s1 = 0xD800 | ($cp >> 10);
                $s2 = 0xDC00 | ($cp & 0x3FF);
                
                $out .= chr($s1 >> 8);
                $out .= chr($s1 & 0xFF);
                $out .= chr($s2 >> 8);
                $out .= chr($s2 & 0xFF);
              }
              continue;
          }
        }
      }
      return $out;
    }

    // UTF-8 to codepoint array conversion.
    // Correctly handles all illegal UTF-8 sequences.
    function utf8_to_codepoints(&$txt) {
      $l = strlen($txt);
      $out = array();
      for ($i = 0; $i < $l; ++$i) {
        $c = ord($txt{$i});
        // ASCII
        if ($c < 0x80) {
          $out[] = ord($txt{$i});
        }
        // Lost continuation byte
        else if ($c < 0xC0) {
          $out[] = 0xFFFD;
          continue;
        }
        // Multibyte sequence leading byte
        else {
          if ($c < 0xE0) {
            $s = 2;
          }
          else if ($c < 0xF0) {
            $s = 3;
          }
          else if ($c < 0xF8) {
            $s = 4;
          }
          // 5/6 byte sequences not possible for Unicode.
          else {
            $out[] = 0xFFFD;
            while (ord($txt{$i + 1}) >= 0x80 && ord($txt{$i + 1}) < 0xC0) { ++$i; }
            continue;
          }
          
          $q = array($c);
          // Fetch rest of sequence
          while (ord($txt{$i + 1}) >= 0x80 && ord($txt{$i + 1}) < 0xC0) { ++$i; $q[] = ord($txt{$i}); }
          
          // Check length
          if (count($q) != $s) {
            $out[] = 0xFFFD;
            continue;
          }
          
          switch ($s) {
            case 2:
              $cp = (($q[0] ^ 0xC0) << 6) | ($q[1] ^ 0x80);
              // Overlong sequence
              if ($cp < 0x80) {
                $out[] = 0xFFFD;
              }
              else {
                $out[] = $cp;
              }
              continue;

            case 3:
              $cp = (($q[0] ^ 0xE0) << 12) | (($q[1] ^ 0x80) << 6) | ($q[2] ^ 0x80);
              // Overlong sequence
              if ($cp < 0x800) {
                $out[] = 0xFFFD;
              }
              // Check for UTF-8 encoded surrogates (caused by a bad UTF-8 encoder)
              else if ($c > 0xD800 && $c < 0xDFFF) {
                $out[] = 0xFFFD;
              }
              else {
                $out[] = $cp;
              }
              continue;

            case 4:
              $cp = (($q[0] ^ 0xF0) << 18) | (($q[1] ^ 0x80) << 12) | (($q[2] ^ 0x80) << 6) | ($q[3] ^ 0x80);
              // Overlong sequence
              if ($cp < 0x10000) {
                $out[] = 0xFFFD;
              }
              // Outside of the Unicode range
              else if ($cp >= 0x10FFFF) {
                $out[] = 0xFFFD;
              }
              else {
                $out[] = $cp;
              }
              continue;
          }
        }
      }
      return $out;
    }

//End of class
}

}
?>
