[BACK]Return to lontexconvert.pm CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom / xml

Diff for /loncom/xml/lontexconvert.pm between versions 1.39 and 1.122

version 1.39, 2004/07/27 14:17:39 version 1.122, 2019/02/15 20:56:22
Line 36 Line 36
 # The C source of the Code may not be distributed by the Licensee  # The C source of the Code may not be distributed by the Licensee
 # to any other parties under any circumstances.  # to any other parties under any circumstances.
 #  #
 # 05/29/00,05/30,10/11,10/20 Gerd Kortemeyer  
 # 5/4 Gerd Kortemeyer  
   
 package Apache::lontexconvert;  package Apache::lontexconvert;
   
 use strict;  use strict;
 use tth();  use tth();
 use vars qw($errorstring);  use vars qw($errorstring);
 use Apache();  #use Apache::lonxml();
 use Apache::lonmsg();  
 use Apache::lonxml();  
 use Apache::lonmenu();  
 use Apache::lonlocal;  use Apache::lonlocal;
   use Apache::lonnet;
   use lib '/home/httpd/lib/perl/';
   use LONCAPA;
   use URI::Escape;
   use IO::Socket::INET;
   
   
   #
   # Table of substitutions to unicode characters.
   #
   
   my %unicode_harpoons = (
                           '\rightleftharpoons'  => 0x21cc,
                         );
   
   my %unicode_translations = (
   
   # Brackets - unicode for browsers/OS which support it.
   
       ''             => 0x23a1,
       ''             => 0x23a2,
       ''             => 0x23a3,
       ''             => 0x23a4,
       ''             => 0x23a5,
       ''             => 0x23a6,
   
   #  Parens - unicode for browsers/OS which support it
   
       ''              => 0x239b,
       ''              => 0x239c,
       ''              => 0x239d,
       ''              => 0x239e,
       ''              => 0x239f,
       ''              => 0x23a0,
   
   );
   
   my %ascii_8bit_translations = (
   
   # Brackets - pure 8-bit ascii ugliness for browsers/OS which can't handle unicode
   
       ''              => 0x5b,
       ''              => 0x5b,    # '['
       ''              => 0x5b,
       ''              => 0x5d,    # ']'
       ''              => 0x5d,
       ''              => 0x5d,
   
   # Parens - pure 8-bit ascii ugliness for browsers/OS which can't handle unicode
   
       ''              => 0x28,
       ''              => 0x28,      # '('
       ''              => 0x28,
       ''              => 0x29,
       ''              => 0x29,      # '('
       ''              => 0x29,
   
   );
   
   ##
   # Utility to convert elements of a string to unicode:
   #
   # @param input - Input string
   # @param pattern - Pattern to convert
   # @param unicode - Unicode to substitute for pattern.
   #
   # @return string - resulting string.
   # 
   sub unicode_subst {
       my ($input, $pattern, $unicode) = @_;
       
       my $char = pack('U', $unicode);
   
       $input =~ s/$pattern/$char/g;
   
       return $input;
   }
   
 # ====================================================================== Header  # ====================================================================== Header
   
 sub init_tth {  sub init_tth {
     my $options=$ENV{'course.'.$ENV{'request.course.id'}.'.tthoptions'};      my $options=$env{'course.'.$env{'request.course.id'}.'.tthoptions'};
     if ($ENV{'browser.mathml'}) {      if ($options =~ /\S/) {
    $options = ' '.$options;
       } else {
    undef($options);
       }
       if ($env{'browser.mathml'}) {
  &tth::ttminit();   &tth::ttminit();
  if ($ENV{'browser.unicode'}) {   if ($env{'browser.unicode'}) {
     &tth::ttmoptions('-L -u1 '.$options);      &tth::ttmoptions('-L -u1'.$options);
  } else {   } else {
     &tth::ttmoptions('-L -u0 '.$options);      &tth::ttmoptions('-L -u0'.$options);
  }   }
     } else {      } else {
  &tth::tthinit();   &tth::tthinit();
  if ($ENV{'browser.unicode'}) {   if ($env{'browser.unicode'}) {
     &tth::tthoptions('-L -u1 '.$options);      &tth::tthoptions('-L -u1'.$options);
  } else {   } else {
     &tth::tthoptions('-L -u0 '.$options);      &tth::tthoptions('-L -u0'.$options);
  }   }
     }      }
 }  }
   
 sub header {  
     $errorstring='';  
     my $time=time;  
     &init_tth();  
     return &Apache::lonxml::xmlbegin().  
  &Apache::lonxml::fontsettings().  
  "\n<head>\n".  
  &Apache::lonmenu::registerurl(undef,'tex').  
  "\n</head>\n";  
 }  
   
 # ================================================================== Conversion  # ================================================================== Conversion
   
 $Apache::lontexconvert::messedup=0;  $Apache::lontexconvert::messedup=0;
   
 # we need this routine because &converted can get called from inside  
 # of the safespace (through &xmlparse('<m>stuff</m>') which doesn't  
 # allow the opcode for alarm, so we need to compile this before we get  
 # into the safe space since opcode checks only occur at compile time  
 sub convert_real {  sub convert_real {
     my ($texstring)=@_;      my ($texstring)=@_;
     my ($xmlstring,$errorstring);      my ($xmlstring,$errorstring);
Line 100  sub convert_real { Line 163  sub convert_real {
  $Apache::lontexconvert::messedup=1;   $Apache::lontexconvert::messedup=1;
  die &mt("TeX unconverted due to errors");   die &mt("TeX unconverted due to errors");
     };      };
     alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});      &Apache::lonxml::start_alarm();
     if ($ENV{'browser.mathml'}) {      if ($env{'browser.mathml'}) {
  $xmlstring=&tth::ttm($$texstring);   $xmlstring=&tth::ttm($$texstring);
  $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g;   $xmlstring=~s/\<math\>/\<math xmlns=\"\&mathns\;\"\>/g;
  $xmlstring=~s/\<br\>/\<br\/\>/g;   $xmlstring=~s/\<br\>/\<br\/\>/g;
Line 112  sub convert_real { Line 175  sub convert_real {
  $errorstring.=&tth::ttherror();   $errorstring.=&tth::ttherror();
  $xmlstring=~s-</font(\s*)>-</font>-g;   $xmlstring=~s-</font(\s*)>-</font>-g;
     }      }
       $xmlstring=~s/^\s*\<br clear\=\"all\"/\<br/s;
     $xmlstring=~s/^\s*//;      $xmlstring=~s/^\s*//;
     $xmlstring=~s/\s*$//;      $xmlstring=~s/\s*$//;
     alarm(0);      $xmlstring=~s/^<br \/><table/<table/;
       &Apache::lonxml::end_alarm();
   
       #
       # Several strings produced by tth require
       # transliteration -> unicode equivalents to render reliably
       # in browsers. %unicode_translations and %unicode_harpoons are tables of
       # string->substitution which we now apply. (%ascii_8bit_translations used
       # instead for Windows XP and mobile devices.
   
       my $use_ascii;
       if ($env{'browser.os'} eq 'win') {
           if (($env{'browser.osversion'}) && ($env{'browser.osversion'} < 6.0)) {
               $use_ascii = 1;
           }
       }
       if ($env{'browser.mobile'}) {
           $use_ascii = 1;
       }
   
       foreach my $pattern (keys(%unicode_translations)) {
    my $unicode = $unicode_translations{$pattern};
    if ($use_ascii) {
       $unicode = $ascii_8bit_translations{$pattern};
    }
    $xmlstring = &unicode_subst($xmlstring, $pattern, $unicode);
       }
   
       foreach my $pattern (keys(%unicode_harpoons)) {
           $xmlstring = &unicode_subst($xmlstring, $pattern, $unicode_harpoons{$pattern});
       }
   
     return ($xmlstring,$errorstring);      return ($xmlstring,$errorstring);
 }  }
   
 sub converted {  sub tth_converted {
     my $texstring=shift;      my $texstring=shift;
     my $xmlstring='['.&mt('UNDISPLAYABLE').']';      my $xmlstring='['.&mt('UNDISPLAYABLE').']';
     if ($Apache::lontexconvert::messedup) {      if ($Apache::lontexconvert::messedup) {
  return '['.&mt('TeX unconverted due to previous errors').']';   return '['.&mt('TeX unconverted due to previous errors').']';
     }      }
       $$texstring ='\\documentstyle{article}'.$$texstring;
   
     eval(<<'ENDCONV');      eval(<<'ENDCONV');
     ($xmlstring,$errorstring)=&convert_real($texstring)      ($xmlstring,$errorstring)=&convert_real($texstring)
 ENDCONV  ENDCONV
Line 135  ENDCONV Line 232  ENDCONV
  $errorstring) {   $errorstring) {
  &Apache::lonnet::logthis("Trying to kill myself");   &Apache::lonnet::logthis("Trying to kill myself");
  $Apache::lontexconvert::messedup=1;   $Apache::lontexconvert::messedup=1;
  my $request=Apache->request();   if (ref($Apache::lonxml::request)) {
  $request->child_terminate();      $Apache::lonxml::request->child_terminate();
    } else {
       my $request;
       eval { $request=Apache->request; };
       if (!$request) {
    eval { $request=Apache2::RequestUtil->request; };
       }
       if ($request) {
    $request->child_terminate();
       } else {
    &Apache::lonnet::logthis("Unable to find a request to do child_terminate on");
       }
    }
     }      }
     return $xmlstring;      return $xmlstring;
 }  }
   
 # ====================================================================== Footer  sub clean_out_math_mode {
       my ($texstring)=@_;
       $$texstring=~s/(?<!\\)\$//g;
       $$texstring=~s/\\[\)\(\]\[]//g;
       $$texstring=~s/\\ensuremath//g;
       return '';
   }
   
   sub displaystyle {
       my ($texstring)=@_;
       #has a $$ or \[ or \displaystyle or eqnarray in it, guessinng it's display mode
       if ($$texstring=~/[^\\]\$\$/ ||
           $$texstring=~/\\\[/ ||
           $$texstring=~/\\displaystyle/ ||
           $$texstring=~/eqnarray/
          ) { return 1; }
       return 0;
   }
   
   sub MathJax_converted {
       my $texstring=shift;
       my ($tag,$startspan,$endspan);
       $tag='math/tex;';
       if (&displaystyle($texstring)) {
           $tag='math/tex; mode=display';
           $startspan='';
           $endspan='';
       } else {
           $startspan='<span style="display:inline-block;">';
           $endspan='</span>';
       }
       &clean_out_math_mode($texstring);
       return &MathJax_header().$startspan.
         '<script type="'.$tag.'">'.$$texstring.'</script>'.$endspan;
   }
   
   {
       #Relies heavily on the previous jsMath installation
       my @MathJax_sent_header;
       sub MathJax_reset {
           undef(@MathJax_sent_header);
       }
       sub MathJax_push {
           push(@MathJax_sent_header,0);
       }
       sub MathJax_header {
           if (!@MathJax_sent_header) {
               &Apache::lonnet::logthis("mismatched calls of MathJax_header and MathJax_process");
               return '';
           }
           return '' if $MathJax_sent_header[-1];
           $MathJax_sent_header[-1]=1;
           return
             '<script type="text/javascript" src="/adm/MathJax/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>'."\n";
       }
       #sub MathJax_process {
       #    my $state = pop(@MathJax_sent_header);
       #    return '' if !$state;
       #    return "\n".
       #        '<script type="text/javascript">MathJax.Process()</script>'."\n";
       #}
       #sub MathJax_state {
       #    my ($level) = @_;
       #    return $MathJax_sent_header[$level];
       #}
   }
   
 sub footer {  sub tex_engine {
   my $xmlstring='';      if (exists($env{'form.texengine'})) {
   if ($ENV{'request.state'} eq 'construct') {   if ($env{'form.texengine'} ne '') {
       $xmlstring.='<address>'.$errorstring.'</address>';              if (lc($env{'form.texengine'}) eq 'jsmath') {
   } else {                  return 'MathJax';
       &Apache::lonmsg::author_res_msg($ENV{'request.filename'},$errorstring);              }
   }              return $env{'form.texengine'};
 # -------------------------------------------------------------------- End Body          }
   $xmlstring.=&Apache::lonxml::xmlend();      }    
   return $xmlstring;      if ($env{'request.course.id'}
    && exists($env{'course.'.$env{'request.course.id'}.'.texengine'})) {
           if (lc($env{'course.'.$env{'request.course.id'}.'.texengine'}) eq 'jsmath') {
               return 'MathJax';
           }
    return $env{'course.'.$env{'request.course.id'}.'.texengine'};
       }
       if (exists($env{'environment.texengine'})) {
           if (lc($env{'environment.texengine'}) eq 'jsmath') {
               return 'MathJax';
           }
    return $env{'environment.texengine'};
       }
       my $dom = $env{'request.role.domain'} || $env{'user.domain'};
       my %domdefaults = &Apache::lonnet::get_domain_defaults($dom);
       if ($domdefaults{'texengine'} ne '') {
           return $domdefaults{'texengine'};
       }
       return $Apache::lonnet::deftex;
   }
   
   sub init_math_support {
       &init_tth();
       &Apache::lontexconvert::MathJax_push();
       if (lc(&tex_engine()) eq 'mathjax') {
           return &Apache::lontexconvert::MathJax_header();
       }
       return;
   }
   
   sub mimetex_valign {
       my ($esc_texstring)=@_;
       my $valign = 0;
       my $path = '/cgi-bin/mimetex.cgi?'.$esc_texstring;
       my $socket;
       &Apache::lonxml::start_alarm();
       $socket = IO::Socket::INET->new(PeerAddr => 'localhost',
                                       PeerPort => 'http(80)',
                                       Proto    => 'tcp');
       if ($socket) {
           my $headreq = "HEAD $path HTTP/1.0\r\n\r\n";
           print $socket $headreq;
           while (<$socket>) {
               if (/Vertical\-Align\:\s*?([\-\d]+)/) {
                   $valign = $1;
               }
           }
           $socket->close();
       }
       &Apache::lonxml::end_alarm();
       return $valign;
   }
   
   sub mimetex_converted {
       my $texstring=shift;
   
   # Alt-Argument for screen readers
       my $alt_string=$$texstring;
       $alt_string=~s/\"/\'\'/g;
   
   # Is this displaystyle?
   
       my $displaystyle=&displaystyle($texstring);
   
   # Remove math environment delimiters
   
       &clean_out_math_mode($texstring);
   
       if ($displaystyle) {
    $$texstring='\\displaystyle \\Large '.$$texstring;
       }
       my $esc_texstring = &uri_escape($$texstring);
       my $valign = &mimetex_valign($esc_texstring);
       my $result='<img src="/cgi-bin/mimetex.cgi?'.$esc_texstring.'" style="vertical-align:'.$valign.'px" alt="'.$alt_string.'" />';
       if ($displaystyle) {
    $result='<div style="text-align:center">'.$result.'</div>';
       }
       return $result;
   }
   
   sub converted {
       my ($string,$mode)=@_;
       if ($mode eq '') { $mode = &tex_engine(); }
       if ($mode =~ /tth/i) {
    return &tth_converted($string);
       } elsif ($mode =~ /jsmath/i) {
           return &MathJax_converted($string);
       } elsif ($mode =~ /mathjax/i) {
    return &MathJax_converted($string);
       } elsif ($mode =~ /mimetex/i) {
    return &mimetex_converted($string);
       } elsif ($mode =~ /raw/i) {
           return $$string;
       }
       return &tth_converted($string);
 }  }
   
 # ------------------------------------------------------------ Message display  # ------------------------------------------------------------ Message display
   
 sub to_convert {  sub to_convert {
     my ($string) = @_;      my ($string) = @_;
       &init_tth();
     $string=~s/\<br\s*\/?\>/ /gs;      $string=~s/\<br\s*\/?\>/ /gs;
 #    $string=~s/\s/ /gs;  #    $string=~s/\s/ /gs;
     $string=&HTML::Entities::decode($string);      $string=&HTML::Entities::decode($string);
Line 167  sub to_convert { Line 436  sub to_convert {
   
 sub smiley {  sub smiley {
     my $expression=shift;      my $expression=shift;
     if ($ENV{'browser.imagesuppress'} eq 'on') { return $expression; }      my %smileys=(
     my %smileys=('\:\-\)' => 'smiley',      '\:\-*\)' => 'face-smile.png',
  '8\-\)'  => 'coolsmile',   '8\-\)'  => 'face-cool.png',
  '8\-(I|\|)'   => 'coolindiff',   '8\-(I|\|)'   => 'face-glasses.png',
  ':\-(I|\|)'   => 'neutral',   '\:\-(I|\|)'   => 'face-plain.png',
  '\:\-(o|O|\(\))' => 'shocked',   '\:\-(o|O|\(\))' => 'face-surprise.png',
  ':\-\('  => 'frowny',   ':\-\('  => 'face-sad.png',
  '\;\-\)' => 'wink',   '\;\-\)' => 'face-wink.png',
  '\:\-P'  => 'baeh',   '\:\-(P|p)'  => 'face-raspberry.png',
  '\:\-(\\\|\\/)' => 'hrrm',   '\:\-(\\\|\\/)' => 'face-uncertain.png',
  '\:\-D'  => 'bigsmile',   '\:\-D'  => 'face-smile-big.png',
  '\:\-C'  => 'angry',   '\:\-(C|\@)'  => 'face-angry.png',
  '\:(\'|\`)\-\(' => 'cry',   '\:(\'|\`)\-*\(' => 'face-crying.png',
  '\:\-(X|\#)' => 'lipsrsealed',   '\:\-(X|x|\#)' => 'face-quiet.png',
  '\:\-S' => 'huh');   '\:\-(s|S)' => 'face-uncertain.png',
    '\:\-\$' => 'face-embarrassed.png',
    '\:\-\*' => 'face-kiss.png',
    '\+O\(' => 'face-sick.png',
    '(\&lt\;3|\(heart\))' => 'heart.png',
    '\(rose\)' => 'rose.png',
    '\(pizza\)' => 'food-pizza.png',
    '\(cake\)' => 'food-cake.png',
    '\(ninja\)' => 'face-ninja.png',
    '\(pirate\)' => 'face-pirate.png',
    '\((agree|yes)\)' => 'opinion-agree.png',
    '\((disagree|nay)\)' => 'opinion-disagree.png',
    '(o|O)\-\)' => 'face-angel.png',
    );
     my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'};      my $iconpath=$Apache::lonnet::perlvar{'lonIconsURL'};
     foreach (keys %smileys) {      foreach my $smiley (keys(%smileys)) {
  $expression=~s/$_/\<img src="$iconpath\/$smileys{$_}.gif" \/\>/gs;    $expression=~s/$smiley/\<img src="$iconpath\/$smileys{$smiley}" \/\>/gs; 
     }      }
     return $expression;      return $expression;
 }  }
Line 192  sub smiley { Line 474  sub smiley {
 sub msgtexconverted {  sub msgtexconverted {
     my ($message,$email) = @_;      my ($message,$email) = @_;
     $errorstring='';      $errorstring='';
     &init_tth();  
     my $outmessage='';      my $outmessage='';
     my $tex=0;      my $tex=0;
     foreach (split(/(?:\&lt\;|\<)\/*m\s*(?:\&gt\;|\>)/i,$message)) {      foreach my $fragment (split(/(?:\&lt\;|\<)\/*m\s*(?:\&gt\;|\>)/i,$message)) {
    if ($tex) {
       if ($email) {
    $outmessage.='</pre><tt>'.&to_convert($fragment).'</tt><pre>';
    $tex=0;
       } else {
    $outmessage.=&to_convert($fragment);
    $tex=0;
       }
    } else {
               $outmessage.=&smiley($fragment);
       $tex=1;
    }
       }
       $message=$outmessage; $outmessage=''; $tex=0;
       foreach my $fragment (split(/(?:\&lt\;|\<)\/*algebra\s*(?:\&gt\;|\>)/i,
    $message)) {
  if ($tex) {   if ($tex) {
           my $algebra = &algebra($fragment, 'web', undef, undef, undef, 'tth');
     if ($email) {      if ($email) {
  $outmessage.='</pre><tt>'.&to_convert($_).'</tt><pre>'; $tex=0;   $outmessage.='</pre><tt>'.$algebra.'</tt><pre>';
    $tex=0;
     } else {      } else {
  $outmessage.=&to_convert($_); $tex=0;   $outmessage.=$algebra;
    $tex=0;
     }      }
  } else {   } else {
             $outmessage.=&smiley($_); $tex=1;          $outmessage.=$fragment;
       $tex=1;
  }   }
     }      }
     if (wantarray) {      if (wantarray) {
Line 213  sub msgtexconverted { Line 514  sub msgtexconverted {
     }      }
 }  }
   
   sub algebra {
       use AlgParser;
       my ($string,$target,$style,$parstack,$safeeval,$tth)=@_;
       my $parser = new AlgParserWithImplicitExpand;
       if ($tth eq 'tth') {&init_tth();}
       $string=&prepare_algebra($string);
       my $ret = $parser->parse($string);
       my $result='['.&mt('Algebra unconverted due to previous errors').']';
       if ( ref($ret) ) {
    #$parser->tostring();
    $parser->normalize();
    my $latex=$parser->tolatex();
    $latex=&postprocess_algebra($latex);
    if ($style eq 'display') {
       $latex='$$'.$latex.'$$x';
    } else {
       # style is 'inline'
       $latex='\\ensuremath{'.$latex.'}';
    }
    if ($target eq 'web' || $target eq 'analyze') {
               my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
               $result = &converted(\$latex,$display);
   #    $result = &converted(\$latex);
    } else {
       $result = $latex;
    }
       } else {
    &Apache::lonxml::error($parser->{'htmlerror'});
       }
   }
   
   sub prepare_algebra {
       my ($string)=@_;
   
       # makes the decision about what is a minus sign easier supposedly
       $string =~ s/(\<\>|\<\=|\>\=[\=\>\<] *)-/$1 zeroplace -/g;
   
       return $string;
   }
   
   sub postprocess_algebra {
       my ($string)=@_;
       
       # moodle had these and I don't know why, ignoring them for now
       # $string =~s/\\fun/ /g;
   
       # sqrt(3,4) means the 4 root of 3
       $string =~s/\\sqrt\{([^,]+),([^\}]+)}/\\sqrt[$2]{$1}/gs;
   
       # log(3,4) means the log base 4 of 3
       $string =~s/\\log\\left\((.+?),(.+?)\\right\)/\\log_{$2}\\left($1\\right)/gs;
   
       # log(3,4) means the log base 4 of 3
       $string =~s/\\((?:sin|cos|tan|sec|csc|cot)(?:h)?)\\left\((.+?),(.+?)\\right\)/\\$1^{$3}\\left($2\\right)/gs;
   
       # int(3,a,b) integral from a to b of 3
       $string =~s/\\int\\left\((.+?),(.+?),(.+?)\\right\)/\\int_{$2}^{$3}\\left($1\\right)/gs;
   
       # int( ... dx) -> ...
       $string =~s/\\int\\left\((.+?)d[a-z]\\right\)/$1/gs;
   
       # 
       $string =~s/\\lim\\left\((.+?),(.+?),(.+?)\\right\)/\\lim_{$2\\to $3}$1/gs;
       return $string;
   }
   
   
 1;  1;
 __END__  __END__
   
   
   =pod
   
   =head1 NAME
   
   Apache::lontexconvert;
   
   =head1 SYNOPSIS
   
   Access to tth/ttm
   
   This is part of the LearningOnline Network with CAPA project
   described at http://www.lon-capa.org.
   
   
   =head1 SUBROUTINES
   
   =over
   
   =item init_tth()
   
   Header
   
   =item convert_real()
   
    we need this routine because &converted can get called from inside
    of the safespace (through &xmlparse('<m>stuff</m>') which doesn't
    allow the opcode for alarm, so we need to compile this before we get
    into the safe space since opcode checks only occur at compile time
   
   =item tth_converted()
   
   
   =item clean_out_math_mode()
   
   
   =item displaystyle()
   
   
   =item MathJax_converted()
   
   =item tex_engine()
   
   =item init_math_support()
   
   =item mimetex_valign()
   
    Makes a HEAD call to /cgi-bin/mimetex.cgi via IO:: to retrieve the 
    vertical alignment, before the subsequent call to mimetex_converted()
    which generates the <img> tag and the corresponding image.
   
    Input: 1.  $esc_texstring (escaped TeX to be rendered by mimetex).
    Output: 1. $valign - number of pixels: positive or negative integer 
               which will be included in <img> tag for mimetex image to
               support vertical alignment of image within a line of text.
   
    If a server is running SSL, and Apache rewrite rules are in place 
    to rewrite requests for http to https, modification will most likely 
    be needed for pass through for HEAD requests for /cgi-bin/mimetex.cgi. 
   
    Example rewrite rules which rewrite all http traffic to https, 
    except HEAD requests for /cgi-bin/mimetex.cgi are:
   
    <IfModule mod_rewrite.c>
        RewriteEngine On
        RewriteLogLevel 0
   
        RewriteCond %{HTTPS} off
        RewriteCond %{HTTP:Host} (.*)
        RewriteCond %{REQUEST_METHOD} !HEAD 
        RewriteRule ^/(.*) https://%1/$1 [R=301,L]
   
        RewriteCond %{HTTPS} off
        RewriteCond %{HTTP:Host} (.*)
        RewriteCond %{REQUEST_METHOD} HEAD
        RewriteCond %{REQUEST_URI} !^/cgi-bin/mimetex.cgi
        RewriteRule ^/(.*) https://%1/$1 [R=301,L]
    </IfModule>
   
   =item mimetex_converted()
   
   
   =item converted()
   
   
   =item to_convert()
   
   message display
   
   =item smiley()
   
   ???
   
   =item msgtexconverted()
   
   =item algebra()
   
   =item prepare_algebra()
   
   =item postprocess_algebra()
   
   =back
   
   =cut
   
   
   
Removed from v.1.39  
changed lines
  Added in v.1.122

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>