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Diff for /loncom/homework/convertjme.pl between versions 1.1 and 1.4

version 1.1, 2003/10/16 19:46:36 version 1.4, 2003/10/17 22:24:51
Line 1 Line 1
 #!/usr/bin/perl  #!/usr/bin/perl
   # The LearningOnline Network with CAPA
   # Dynamically converts JME strings into either a png or ps file.
   #
   # $Id$
   #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
 # Coded by Guy Ashkenazi, guy@fh.huji.ac.il  # Coded by Guy Ashkenazi, guy@fh.huji.ac.il
 # Based on the work of Peter Ertl, peter.ertl@pharma.novartis.com  # Based on the work of Peter Ertl, peter.ertl@pharma.novartis.com
   
   
   
   use strict;
   use lib '/home/httpd/lib/perl';
 use GD;  use GD;
   use PostScript::Simple;
   use LONCAPA::loncgi();
   
 # read the width and the JME string from the cgi query  if (! &LONCAPA::loncgi::check_cookie_and_load_env()) {
 %data = &read_input;      print <<END;
 @JMEstring = split (/ /,$data{JME});  Content-type: text/html
 $width = $data{WIDTH};  
   <html>
   <head><title>Bad Cookie</title></head>
   <body>
   Your cookie information is incorrect. 
   </body>
   </html>
   END
       exit;
   }
   
 #print "Content-type: text/plain\n\n";   sub unescape {
       my $str=shift;
       $str =~ s/%([a-fA-F0-9][a-fA-F0-9])/pack("C",hex($1))/eg;
       return $str;
   }
   
 # parse JME string  # read the width and the JME string from the cgi query
   my $id=$ENV{'QUERY_STRING'};
   my @JMEstring = split(/ /,&unescape($ENV{'cgi.'.$id.'.JME'}));
   my $width = $ENV{'cgi.'.$id.'.WIDTH'};
   my $png = $ENV{'cgi.'.$id.'.PNG'};
   my $ps = $ENV{'cgi.'.$id.'.PS'};
   if (!$width) { $width = 200; }
   
 $natoms= shift @JMEstring;  # parse JME string
 $nbonds= shift @JMEstring;  
   
 for ($i = 0; $i < $natoms; $i++) {  my $natoms= shift @JMEstring;
   my $nbonds= shift @JMEstring;
   my (@name,@x,@y);
   for (my $i = 0; $i < $natoms; $i++) {
     @name[$i] = shift @JMEstring;      @name[$i] = shift @JMEstring;
     @x[$i] = shift @JMEstring;      @x[$i] = shift @JMEstring;
     @y[$i] = shift @JMEstring;      @y[$i] = shift @JMEstring;
 }  }
   
 for ($i = 0; $i < $nbonds; $i++) {  my (@atomA,@atomB,@bondType);
   for (my $i = 0; $i < $nbonds; $i++) {
     @atomA[$i] = (shift @JMEstring)-1;      @atomA[$i] = (shift @JMEstring)-1;
     @atomB[$i] = (shift @JMEstring)-1;      @atomB[$i] = (shift @JMEstring)-1;
     @bondType[$i] = shift @JMEstring;      @bondType[$i] = shift @JMEstring;
Line 31  for ($i = 0; $i < $nbonds; $i++) { Line 84  for ($i = 0; $i < $nbonds; $i++) {
   
 # Find border and move lower left corner to (1.5,1.0)  # Find border and move lower left corner to (1.5,1.0)
   
 $xmin = $xmax = @x[0];  my $xmin = my $xmax = @x[0];
 $ymin = $ymax = $y[0];  my $ymin = my $ymax = $y[0];
 $maxName = 0;  my $maxName = 0;
   
 for ($i = 1; $i < $natoms; $i++) {  for (my $i = 1; $i < $natoms; $i++) {
     $xmax = @x[$i] if (@x[$i] > $xmax);      $xmax = @x[$i] if (@x[$i] > $xmax);
     $xmin = @x[$i] if (@x[$i] < $xmin);      $xmin = @x[$i] if (@x[$i] < $xmin);
     $ymax = @y[$i] if (@y[$i] > $ymax);      $ymax = @y[$i] if (@y[$i] > $ymax);
Line 44  for ($i = 1; $i < $natoms; $i++) { Line 97  for ($i = 1; $i < $natoms; $i++) {
     $maxName = length $2 if (length $2 > $maxName);      $maxName = length $2 if (length $2 > $maxName);
 }  }
 $maxName = ($maxName-3 < 0) ? 0 : $maxName-3;  $maxName = ($maxName-3 < 0) ? 0 : $maxName-3;
   my $scale = $width / ($xmax-$xmin+3+$maxName);
   my $height = $scale * ($ymax-$ymin+2);
   
 $scale = $width / ($xmax-$xmin+3+$maxName);  for (my $i = 0; $i < $natoms; $i++) {
 $height = $scale * ($ymax-$ymin+2);  
   
 for ($i = 0; $i < $natoms; $i++) {  
     @x[$i] += (1.5+$maxName/2-$xmin);      @x[$i] += (1.5+$maxName/2-$xmin);
     @x[$i] *= $scale;      if ($png) {  @x[$i] *= $scale; }
     @y[$i] += (1.0-$ymin);      @y[$i] += (1.0-$ymin);
     @y[$i] *= $scale;      if ($png) { @y[$i] *= $scale; }
 }  }
   
 # Count bonds  # Count bonds
   
 @bonds = map {0} 0..$natoms-1;  my @bonds = map {0} 0..$natoms-1;
 @adjacent = map {0} 0..$natoms-1;  my @adjacent = map {0} 0..$natoms-1;
 @bondsx = map {0} 0..$natoms-1;  my @bondsx = map {0} 0..$natoms-1;
 @bondsy = map {0} 0..$natoms-1;  my @bondsy = map {0} 0..$natoms-1;
 for ($i = 0; $i < $nbonds; $i++) {  for (my $i = 0; $i < $nbonds; $i++) {
     @bonds[@atomA[$i]] += (@bondType[$i]>0) ? @bondType[$i] : 1;      @bonds[@atomA[$i]] += (@bondType[$i]>0) ? @bondType[$i] : 1;
     @bonds[@atomB[$i]] += (@bondType[$i]>0) ? @bondType[$i] : 1;      @bonds[@atomB[$i]] += (@bondType[$i]>0) ? @bondType[$i] : 1;
   
Line 75  for ($i = 0; $i < $nbonds; $i++) { Line 127  for ($i = 0; $i < $nbonds; $i++) {
 }  }
   
 # Create a new PostScript object  # Create a new PostScript object
 $im = new GD::Image($width,$height);   my ($im,$white,$black,$gray);
 $white = $im->colorAllocate(255,255,255);  if ($png) {
 $black = $im->colorAllocate(0,0,0);      $im = new GD::Image($width,$height); 
 $gray = $im->colorAllocate(200,200,200);      $white = $im->colorAllocate(255,255,255);
       $black = $im->colorAllocate(0,0,0);
       $gray = $im->colorAllocate(200,200,200);
 #$gdAntiAliased = $im->colorAllocate(1,1,1);  #$gdAntiAliased = $im->colorAllocate(1,1,1);
 $im->setAntiAliased($black);      $im->setAntiAliased($black);
   } elsif ($ps) {
       $im = new PostScript::Simple(xsize => $xmax-$xmin+3+$maxName,
    ysize => $ymax-$ymin+2,
    clip => 1,
    eps => 1,
    color => 0,
    units => "cm");
   }
   
 # Draw bonds  # Draw bonds
 $doubleWidth = 0.10*$scale;  my $doubleWidth;
 $tripleWidth = 0.15*$scale;  my $tripleWidth;
   if ($png) {
 for ($i = 0; $i < $nbonds; $i++) {      $doubleWidth = 0.10*$scale;
     $xa = @x[@atomA[$i]];      $tripleWidth = 0.15*$scale;
     $ya = @y[@atomA[$i]];  } elsif ($ps) {
     $xb = @x[@atomB[$i]];      $doubleWidth = 0.10;
     $yb = @y[@atomB[$i]];      $tripleWidth = 0.15;
   }
   
   for (my $i = 0; $i < $nbonds; $i++) {
       my $xa = @x[@atomA[$i]];
       my $ya = @y[@atomA[$i]];
       my $xb = @x[@atomB[$i]];
       my $yb = @y[@atomB[$i]];
   
       my ($sina,$cosa,$dx,$dy);
     if (@bondType[$i] != 1) {      if (@bondType[$i] != 1) {
         $dx = $xb-$xa;          $dx = $xb-$xa;
  $dy = $yb-$ya;   $dy = $yb-$ya;
         $dd = sqrt($dx*$dx + $dy*$dy);          my $dd = sqrt($dx*$dx + $dy*$dy);
         $sina=$dy/$dd;          $sina=$dy/$dd;
         $cosa=$dx/$dd;          $cosa=$dx/$dd;
     }      }
     if    (@bondType[$i] == -2) {      if    (@bondType[$i] == -2) {
  for ($t = 0; $t <= 1; $t += 0.1) {   for (my $t = 0; $t <= 1; $t += 0.1) {
     $xab = $xa + $t*$dx;       my $xab = $xa + $t*$dx; 
     $yab = $ya + $t*$dy;       my $yab = $ya + $t*$dy; 
     $xperp = $tripleWidth*$sina*$t;      my $xperp = $tripleWidth*$sina*$t;
     $yperp = $tripleWidth*$cosa*$t;      my $yperp = $tripleWidth*$cosa*$t;
     $im->line($xab+$xperp,$height-($yab-$yperp),      if ($png) {
       $xab-$xperp,$height-($yab+$yperp),   $im->line($xab+$xperp,$height-($yab-$yperp),
       gdAntiAliased);    $xab-$xperp,$height-($yab+$yperp),
     gdAntiAliased);
       } elsif ($ps) {
    $im->line($xab+$xperp,$yab-$yperp,$xab-$xperp,$yab+$yperp);
       }
  }   }
     }      }
     elsif (@bondType[$i] == -1) {      elsif (@bondType[$i] == -1) {
  $xperp = $tripleWidth*$sina;   my $xperp = $tripleWidth*$sina;
  $yperp = $tripleWidth*$cosa;   my $yperp = $tripleWidth*$cosa;
  $poly = new GD::Polygon;   if ($png) {
  $poly->addPt($xa,$height-$ya);      my $poly = new GD::Polygon;
  $poly->addPt($xb+$xperp,$height-($yb-$yperp));      $poly->addPt($xa,$height-$ya);
  $poly->addPt($xb-$xperp,$height-($yb+$yperp));      $poly->addPt($xb+$xperp,$height-($yb-$yperp));
  $im->filledPolygon($poly,$black);      $poly->addPt($xb-$xperp,$height-($yb+$yperp));
       $im->filledPolygon($poly,$black);
    } elsif ($ps) {
       $im->polygon({filled=>1},
    $xa,$ya,
    $xb+$xperp,$yb-$yperp,
    $xb-$xperp,$yb+$yperp);
    }
     }      }
     elsif (@bondType[$i] == 1) {      elsif (@bondType[$i] == 1) {
  $im->line($xa,$height-$ya,$xb,$height-$yb,gdAntiAliased);   if ($png) {
       $im->line($xa,$height-$ya,$xb,$height-$yb,gdAntiAliased);
    } elsif ($ps) {
       $im->line($xa,$ya,$xb,$yb);
    }
     }      }
     elsif (@bondType[$i] == 2 &&      elsif (@bondType[$i] == 2 &&
    ((@adjacent[@atomA[$i]] == 1 && @adjacent[@atomB[$i]] > 2)||     ((@adjacent[@atomA[$i]] == 1 && @adjacent[@atomB[$i]] > 2)||
     (@adjacent[@atomB[$i]] == 1 && @adjacent[@atomA[$i]] > 2))) {      (@adjacent[@atomB[$i]] == 1 && @adjacent[@atomA[$i]] > 2))) {
  # centered bond   # centered bond
  $xperp = $doubleWidth*$sina;   my $xperp = $doubleWidth*$sina;
  $yperp = $doubleWidth*$cosa;   my $yperp = $doubleWidth*$cosa;
  $im->line($xa+$xperp,$height-($ya-$yperp),   if ($png) {
   $xb+$xperp,$height-($yb-$yperp),      $im->line($xa+$xperp,$height-($ya-$yperp),
   gdAntiAliased);        $xb+$xperp,$height-($yb-$yperp),
  $im->line($xa-$xperp,$height-($ya+$yperp),        gdAntiAliased);
   $xb-$xperp,$height-($yb+$yperp),      $im->line($xa-$xperp,$height-($ya+$yperp),
   gdAntiAliased);        $xb-$xperp,$height-($yb+$yperp),
         gdAntiAliased);
    } elsif ($ps) {
       $im->line($xa+$xperp,$ya-$yperp,$xb+$xperp,$yb-$yperp);
       $im->line($xa-$xperp,$ya+$yperp,$xb-$xperp,$yb+$yperp);
    }
     }      }
     elsif (@bondType[$i] == 2) {      elsif (@bondType[$i] == 2) {
  $xperp = 2*$doubleWidth*$sina;   my $xperp = 2*$doubleWidth*$sina;
  $yperp = 2*$doubleWidth*$cosa;   my $yperp = 2*$doubleWidth*$cosa;
  $im->line($xa,$height-$ya,$xb,$height-$yb,gdAntiAliased);   if ($png) {
  $im->line($xa+0.1*$dx-$xperp,$height-($ya+0.1*$dy+$yperp),      $im->line($xa,$height-$ya,$xb,$height-$yb,gdAntiAliased);
   $xb-0.1*$dx-$xperp,$height-($yb-0.1*$dy+$yperp),      $im->line($xa+0.1*$dx-$xperp,$height-($ya+0.1*$dy+$yperp),
   gdAntiAliased);        $xb-0.1*$dx-$xperp,$height-($yb-0.1*$dy+$yperp),
         gdAntiAliased);
    } elsif ($ps) {
       $im->line($xa,$ya,$xb,$yb);
       $im->line($xa+0.1*$dx-$xperp,$ya+0.1*$dy+$yperp,
        $xb-0.1*$dx-$xperp,$yb-0.1*$dy+$yperp);
   
    }
     }      }
     elsif (@bondType[$i] == 3) {      elsif (@bondType[$i] == 3) {
  $xperp = $tripleWidth*$sina;   my $xperp = $tripleWidth*$sina;
  $yperp = $tripleWidth*$cosa;   my $yperp = $tripleWidth*$cosa;
  $im->line($xa,$height-$ya,$xb,$height-$yb,gdAntiAliased);   if ($png) {
  $im->line($xa+$xperp,$height-($ya-$yperp),      $im->line($xa,$height-$ya,$xb,$height-$yb,gdAntiAliased);
   $xb+$xperp,$height-($yb-$yperp),      $im->line($xa+$xperp,$height-($ya-$yperp),
   gdAntiAliased);        $xb+$xperp,$height-($yb-$yperp),
  $im->line($xa-$xperp,$height-($ya+$yperp),        gdAntiAliased);
   $xb-$xperp,$height-($yb+$yperp),      $im->line($xa-$xperp,$height-($ya+$yperp),
   gdAntiAliased);        $xb-$xperp,$height-($yb+$yperp),
         gdAntiAliased);
    } elsif ($ps) {
       $im->line($xa,$ya,$xb,$yb);
       $im->line($xa+$xperp,$ya-$yperp,$xb+$xperp,$yb-$yperp);
       $im->line($xa-$xperp,$ya+$yperp,$xb-$xperp,$yb+$yperp);
    }
     }         }   
 }  }
   
 # Write labels  # Write labels
   
 %valence = ("C",4,"N",3,"P",3,"O",2,"S",2);  my %valence = ("C",4,"N",3,"P",3,"O",2,"S",2);
   my %font_width = (" ",250,"+",564,"-",500,"0",500,"1",500,"2",500,"3",500,"4",500,"5",500,"6",500,"7",500,"8",500,"9",500,"A",722,"B",667,"C",667,"D",722,"E",611,"F",556,"G",722,"H",722,"I",333,"J",389,"K",722,"L",611,"M",889,"N",722,"O",722,"P",556,"Q",722,"R",667,"S",556,"T",611,"U",722,"V",722,"W",944,"X",722,"Y",722,"Z",611,"a",444,"b",500,"c",444,"d",500,"e",444,"f",333,"g",500,"h",500,"i",278,"j",278,"k",500,"l",278,"m",778,"n",500,"o",500,"p",500,"q",500,"r",333,"s",389,"t",278,"u",500,"v",500,"w",722,"x",500,"y",500,"z",444);
 $font = '/usr/share/fonts/default/Type1/n021003l.pfb';  my $font = '/usr/share/fonts/default/Type1/n021003l.pfb';
 $pointsize = 20;  my $pointsize = 20;
 @bounds = GD::Image->stringTTF($black,$font,100,0,0,0,"H");  my ($ptsize,@bounds);
 $ptsize = 100*0.662*$pointsize*(2.54/72)*$scale/(@bounds[3]-@bounds[5]);  if ($png) {
       @bounds = GD::Image->stringTTF($black,$font,100,0,0,0,"H");
       $ptsize = 100*0.662*$pointsize*(2.54/72)*$scale/(@bounds[3]-@bounds[5]);
   }
   
 for ($i = 0; $i < $natoms; $i++) {  for (my $i = 0; $i < $natoms; $i++) {
     my ($formula,$sign,$charge) =      my ($formula,$sign,$charge) =
  (@name[$i] =~ /(\w+)([\+|\-])?(\d)?/);   (@name[$i] =~ /(\w+)([\+|\-])?(\d)?/);
     $sign = "&#8211;" if ($sign eq "-");  # replace by n-dash      if ($png) {
        $sign = "&#8211;" if ($sign eq "-");  # replace by n-dash
       }
     if ($formula ne "C" || $sign ne ""||      if ($formula ne "C" || $sign ne ""||
  @adjacent[$i] < 2 || (@adjacent[$i] == 2 && @bonds[$i] == 4)) {   @adjacent[$i] < 2 || (@adjacent[$i] == 2 && @bonds[$i] == 4)) {
  # don't show C, unless charged, terminal, or linear   # don't show C, unless charged, terminal, or linear
  $nH = 0;   my $nH = 0;
  if (exists $valence{$formula}) {   if (exists $valence{$formula}) {
     $nH = $valence{$formula} - @bonds[$i];      $nH = $valence{$formula} - @bonds[$i];
     $nH += (($charge eq "")? 1 : $charge) if ($sign eq "+");      $nH += (($charge eq "")? 1 : $charge) if ($sign eq "+");
Line 181  for ($i = 0; $i < $natoms; $i++) { Line 288  for ($i = 0; $i < $natoms; $i++) {
  }   }
  $formula .= "H" if ($nH > 0);   $formula .= "H" if ($nH > 0);
  $formula .= $nH if ($nH > 1);   $formula .= $nH if ($nH > 1);
  @formula = $formula=~ /[A-Z][a-z]?\d*/g;   my @formula = $formula=~ /[A-Z][a-z]?\d*/g;
   
  $PI = 3.1415;   my $PI = 3.1415;
    my $bondAngle;
  if (abs(@bondsy[$i]) < 0.01 && abs(@bondsx[$i]) < 0.01) {   if (abs(@bondsy[$i]) < 0.01 && abs(@bondsx[$i]) < 0.01) {
     $bondAngle = -$PI;      $bondAngle = -$PI;
  }   }
Line 191  for ($i = 0; $i < $natoms; $i++) { Line 299  for ($i = 0; $i < $natoms; $i++) {
     $bondAngle = atan2(@bondsy[$i],@bondsx[$i]);      $bondAngle = atan2(@bondsy[$i],@bondsx[$i]);
  }   }
   
    my $direction;
  if (@adjacent[$i] < 2) {   if (@adjacent[$i] < 2) {
     $direction = (@bondsx[$i] < 0.01) ? "r" : "l";      $direction = (@bondsx[$i] < 0.01) ? "r" : "l";
  }   }
Line 211  for ($i = 0; $i < $natoms; $i++) { Line 320  for ($i = 0; $i < $natoms; $i++) {
   
  if ($direction eq "r") {  # direction = right   if ($direction eq "r") {  # direction = right
     @formula[0] =~ /([A-Z][a-z]?)(\d*)/;      @formula[0] =~ /([A-Z][a-z]?)(\d*)/;
     $carrige = @x[$i]-stringWidth($1)/2;      my $carrige = @x[$i]-stringWidth($1)/2;
     foreach (@formula) {      foreach (@formula) {
  $_ =~ /([A-Z][a-z]?)(\d*)/;   $_ =~ /([A-Z][a-z]?)(\d*)/;
  $carrige = printElement ($1,$2,$carrige,@y[$i]);   $carrige = printElement ($1,$2,$carrige,@y[$i]);
Line 220  for ($i = 0; $i < $natoms; $i++) { Line 329  for ($i = 0; $i < $natoms; $i++) {
  }   }
  elsif ($direction eq "l") {  # direction = left, reverse hydrogens   elsif ($direction eq "l") {  # direction = left, reverse hydrogens
     @formula[0] =~ /([A-Z][a-z]?)(\d*)/;      @formula[0] =~ /([A-Z][a-z]?)(\d*)/;
     $carrige = @x[$i]+      my $carrige = @x[$i]+
  stringWidth($1)/2+stringWidth($2)-stringWidth($formula);   stringWidth($1)/2+stringWidth($2)-stringWidth($formula);
     foreach (reverse @formula) {      foreach (reverse @formula) {
  $_ =~ /([A-Z][a-z]?)(\d*)/;   $_ =~ /([A-Z][a-z]?)(\d*)/;
Line 230  for ($i = 0; $i < $natoms; $i++) { Line 339  for ($i = 0; $i < $natoms; $i++) {
  }   }
  elsif ($direction eq "u") { # direction = up   elsif ($direction eq "u") { # direction = up
     (shift @formula) =~ /([A-Z][a-z]?)(\d*)/;      (shift @formula) =~ /([A-Z][a-z]?)(\d*)/;
     $carrige = @x[$i]-stringWidth($1)/2;      my $carrige = @x[$i]-stringWidth($1)/2;
     $carrige = printElement ($1,$2,$carrige,@y[$i]);      $carrige = printElement ($1,$2,$carrige,@y[$i]);
     $y = (@formula > 0) ? @y[$i] + fm2cm(800) : @y[$i];      my $y = (@formula > 0) ? @y[$i] + fm2cm(800) : @y[$i];
     $carrige =      $carrige =
  (@formula > 0) ? @x[$i]-stringWidth($1)/2 : $carrige;   (@formula > 0) ? @x[$i]-stringWidth($1)/2 : $carrige;
     foreach (@formula) {      foreach (@formula) {
Line 243  for ($i = 0; $i < $natoms; $i++) { Line 352  for ($i = 0; $i < $natoms; $i++) {
  }   }
  else { # direction = down   else { # direction = down
     (shift @formula) =~ /([A-Z][a-z]?)(\d*)/;      (shift @formula) =~ /([A-Z][a-z]?)(\d*)/;
     $carrige = @x[$i]-stringWidth($1)/2;      my $carrige = @x[$i]-stringWidth($1)/2;
     $carrige = printElement ($1,$2,$carrige,@y[$i]);      $carrige = printElement ($1,$2,$carrige,@y[$i]);
     $y = (@formula > 0) ? @y[$i] + fm2cm(-800) : @y[$i];      my $y = (@formula > 0) ? @y[$i] + fm2cm(-800) : @y[$i];
     $carrige =      $carrige =
  (@formula > 0) ? @x[$i]-stringWidth($1)/2 : $carrige;   (@formula > 0) ? @x[$i]-stringWidth($1)/2 : $carrige;
     foreach (@formula) {      foreach (@formula) {
Line 255  for ($i = 0; $i < $natoms; $i++) { Line 364  for ($i = 0; $i < $natoms; $i++) {
     printCharge ($sign,$charge,$carrige,$y) if ($sign ne "");       printCharge ($sign,$charge,$carrige,$y) if ($sign ne ""); 
  }   }
     }      }
   
 }  }
   
   if ($png) {
 # make sure we are writing to a binary stream  # make sure we are writing to a binary stream
 binmode STDOUT;      binmode STDOUT;
   
 # Convert the image to PNG and print it on standard output  # Convert the image to PNG and print it on standard output
 print "Content-type: image/png\n\n";      print "Content-type: image/png\n\n";
 print $im->png;      print $im->png;
   } elsif ($ps) {
       my $psfile = "/home/httpd/perl/tmp/".$id.'.eps';
       $im->output($psfile);
       print "Content-type: text/html\n\n";
       print (<<HTML)
   <html>
   <body>
   Wrote eps file $psfile
   </body>
   </html>
   HTML
   }
   
 sub stringWidth {  sub stringWidth {
     my ($string) = @_;      my ($string) = @_;
     my $width = 0;      my $width = 0;
     while ($string =~ /[A-Za-z]/g) {      while ($string =~ /[A-Za-z]/g) {
  my @bounds = GD::Image->stringTTF($black,$font,$ptsize,0,0,0,$&);   if ($png) {
  $width += @bounds[2]-@bounds[0]+2;      my @bounds = GD::Image->stringTTF($black,$font,$ptsize,0,0,0,$&);
       $width += @bounds[2]-@bounds[0]+2;
    } elsif ($ps) {
       $width += $font_width{$&};
    }
     }      }
     while ($string =~ /[\d+-]/g) {      while ($string =~ /[\d+-]/g) {
  my @bounds = GD::Image->stringTTF($black,$font,0.6*$ptsize,0,0,0,$&);   if ($png) {
  $width += @bounds[2]-@bounds[0]+2;      my @bounds=GD::Image->stringTTF($black,$font,0.6*$ptsize,0,0,0,$&);
       $width += @bounds[2]-@bounds[0]+2;
    } elsif ($ps) {
       $width += 0.6*$font_width{$&};
    }
     }      }
           
     return $width;      return $width;
Line 281  sub stringWidth { Line 411  sub stringWidth {
   
 sub fm2cm {  #font metrics to cm  sub fm2cm {  #font metrics to cm
     my ($fm) = @_;      my ($fm) = @_;
     return $scale*(2.54/72)*$pointsize*$fm/1000;      if ($png) {
    return $scale*(2.54/72)*$pointsize*$fm/1000;
       } elsif ($ps) {
    return (2.54/72)*$pointsize*$fm/1000;
       }
 }  }
   
 sub printElement {  #element symbol + optional subscript  sub printElement {
       if ($png) {
    return &printElement_png(@_);
       } elsif ($ps) {
    return &printElement_ps(@_);
       }
   }
   
   sub printElement_png {  #element symbol + optional subscript
     my ($element,$subscript,$x,$y) = @_;      my ($element,$subscript,$x,$y) = @_;
     $yy = 662;      my $yy = 662;
   
     my @bounds = GD::Image->stringTTF($black,$font,$ptsize,0,      my @bounds = GD::Image->stringTTF($black,$font,$ptsize,0,
    $x,$height-($y+fm2cm(-$yy/2)),$element);     $x,$height-($y+fm2cm(-$yy/2)),$element);
Line 310  sub printElement {  #element symbol + op Line 452  sub printElement {  #element symbol + op
     $x = @bounds[2] + 1;      $x = @bounds[2] + 1;
 }  }
   
   sub printElement_ps {  #element symbol + optional subscript
       my ($element,$subscript,$x,$y) = @_;
       $height = 662;
       
       $im->setcolour("white");
       $im->box({filled=>1},
       $x+fm2cm(-30),$y+fm2cm(-$height/2-150),
       $x+fm2cm(stringWidth($element)+50),$y+fm2cm(+$height/2+150));
       $im->setcolour("black");
       $im->setfont("Times-Roman",$pointsize);
       $im->text($x,$y+fm2cm(-$height/2),$element);
       $x += fm2cm(stringWidth($element));
   
       if ($subscript ne "") {
    $im->setcolour("white");
    $im->box({filled=>1},
    $x,$y+fm2cm(-0.8*$height-45),
    $x+fm2cm(stringWidth($subscript)+50),$y+fm2cm(-0.2*$height+45));
    $im->setcolour("black");
    $im->setfont("Times-Roman",0.6*$pointsize);
    $im->text($x,$y+fm2cm(-0.8*$height),$subscript);
       }
       $x += fm2cm(stringWidth($subscript));
   }
   
 sub printCharge {  sub printCharge {
       if ($png) {
    return &printCharge_png(@_);
       } elsif ($ps) {
    return &printCharge_ps(@_);
       }
   }
   
   sub printCharge_png {
     my ($sign,$charge,$x,$y) = @_;      my ($sign,$charge,$x,$y) = @_;
     $yy = 662;      my $yy = 662;
   
     $charge = "" if ($charge == 1);      $charge = "" if ($charge == 1);
     $charge .= $sign;      $charge .= $sign;
Line 327  sub printCharge { Line 502  sub printCharge {
     $x = @bounds[2] + 1;      $x = @bounds[2] + 1;
 }  }
   
 sub dienice {  sub printCharge_ps {
     my($errmsg) = @_;      my ($sign,$charge,$x,$y) = @_;
     print "Content-type: text/html\n\n";      $height = 662;
     print "<h2>Error</h2>\n";  
     print "$errmsg<p>\n";      $charge = "" if ($charge == 1);
     print "</body></html>\n";      $charge .= $sign;
     system("/bin/rm temp/$SNUM.*");      
     exit;      $im->setcolour("white");
       $im->box({filled=>1},
       $x,$y+fm2cm(0.2*$height-45),
       $x+fm2cm(stringWidth($charge)+50),$y+fm2cm(0.8*$height+45));
   
       if ($sign eq "-") { # replace by n-dash
    chop $charge;
    $charge .= "\xb1";
       }
       $im->setcolour("black");
       $im->setfont("Times-Roman",0.6*$pointsize);
       $im->text($x,$y+fm2cm(0.2*$height),$charge);
       $x += fm2cm(stringWidth($charge));
 }  }
   
 sub read_input  
 {  
     local ($buffer, @pairs, $pair, $name, $value, %FORM);  
     # Read in text  
     $ENV{'REQUEST_METHOD'} =~ tr/a-z/A-Z/;  
     if ($ENV{'REQUEST_METHOD'} eq "POST")  
     {  
         read(STDIN, $buffer, $ENV{'CONTENT_LENGTH'});  
     } else  
     {  
         $buffer = $ENV{'QUERY_STRING'};  
     }  
     # Split information into name/value pairs  
     @pairs = split(/&/, $buffer);  
     foreach $pair (@pairs)  
     {  
         ($name, $value) = split(/=/, $pair);  
         $value =~ tr/+/ /;  
         $value =~ s/%(..)/pack("C", hex($1))/eg;  
         $FORM{$name} = $value;  
     }  
     %FORM;  
 }  
   
 #while (($key,$value) = each %ENV) {  
 #    print "$key = $value<br>\n";  
 #}  
 #open(STDERR,">errorlog");  
Removed from v.1.1  
changed lines
  Added in v.1.4

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