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

Diff for /loncom/xml/lontexconvert.pm between versions 1.94 and 1.112

version 1.94, 2009/01/02 01:22:33 version 1.112, 2012/03/11 14:46:46
Line 49  use lib '/home/httpd/lib/perl/'; Line 49  use lib '/home/httpd/lib/perl/';
 use LONCAPA;  use LONCAPA;
 use URI::Escape;  use URI::Escape;
 use IO::Socket::INET;  use IO::Socket::INET;
 use IO::Socket::SSL;  
   
   #
   # Table of substitutions to unicode characters.
   #
   my %unicode_translations = (
       '\rightleftharpoons'  => 0x21cc,
   
   # Brackets - unicode is commented out with pure 8-bit ascii ugliness while we need it.
   
   #    ''             => 0x23a1,
   #    ''             => 0x23a2,
   #    ''             => 0x23a3,   # when unicode catches up with browsers
   #    ''             => 0x23a4,   # use these instead of the cheesey brackets below
   #    ''             => 0x23a5,
   #    ''             => 0x23a6   
       ''              => 0x5b,
       ''              => 0x5b,    # '['
       ''              => 0x5b,
       ''              => 0x5d,    # ']'
       ''              => 0x5d,
       ''              => 0x5d,
   
   #  Parens..again the unicode is commented out with the 8-bit ascii ugliness
   #  turned on until browsers catch up with the unicode world.
   
   #    ''              => 0x239b,
   #    ''              => 0x239c,
   #    ''              => 0x239d,
   #    ''              => 0x239e,
   #    ''              => 0x239f,
   #    ''              => 0x23a0
   
       ''              => 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
   
Line 107  sub convert_real { Line 168  sub convert_real {
     $xmlstring=~s/^\s*\<br clear\=\"all\"/\<br/s;      $xmlstring=~s/^\s*\<br clear\=\"all\"/\<br/s;
     $xmlstring=~s/^\s*//;      $xmlstring=~s/^\s*//;
     $xmlstring=~s/\s*$//;      $xmlstring=~s/\s*$//;
       &Apache::lonxml::end_alarm();
   
     #      #
     # \rightleftharpoons is not converted by tth but maps      #  Several strings produced by tth require
     # reasonably well to &#8660;.  If we get many more of these,      # transliteration -> unicode equivalents to render reliably
     # we're going to need to have a translation sub.      # in browsers. %unicode_translations is a table of
     #      # string->substitution which we now apply:
     my $lrharpoon = pack("U", 0x21cc);  
     $xmlstring=~s/\\rightleftharpoons/$lrharpoon/g;      foreach my $pattern (keys(%unicode_translations)) {
    my $unicode = $unicode_translations{$pattern};
    $xmlstring = &unicode_subst($xmlstring, $pattern, $unicode);
       }
   
   
     &Apache::lonxml::end_alarm();  
     return ($xmlstring,$errorstring);      return ($xmlstring,$errorstring);
 }  }
   
Line 166  sub clean_out_math_mode { Line 232  sub clean_out_math_mode {
   
 sub displaystyle {  sub displaystyle {
     my ($texstring)=@_;      my ($texstring)=@_;
     #has a $$ or \[ or \displaystyle in it, guessinng it's display mode      #has a $$ or \[ or \displaystyle or eqnarray in it, guessinng it's display mode
     if ($$texstring=~/[^\\]\$\$/ ||      if ($$texstring=~/[^\\]\$\$/ ||
  $$texstring=~/\\\[/ ||          $$texstring=~/\\\[/ ||
  $$texstring=~/\\displaystyle/) { return 1; }          $$texstring=~/\\displaystyle/ ||
           $$texstring=~/eqnarray/
          ) { return 1; }
     return 0;      return 0;
 }  }
   
   sub MathJax_converted {
       my $texstring=shift;
       my $tag='math/tex;';
       if (&displaystyle($texstring)) { $tag='math/tex; mode=display'; }
       &clean_out_math_mode($texstring);
       return &MathJax_header().
         '<script type="'.$tag.'">'.$$texstring.'</script>';
   }
   
   {
       #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 jsMath_converted {  sub jsMath_converted {
     my $texstring=shift;      my $texstring=shift;
     my $tag='span';      my $tag='span';
Line 240  sub init_math_support { Line 349  sub init_math_support {
  ($inherit_jsmath && &jsMath_state(-2))) {   ($inherit_jsmath && &jsMath_state(-2))) {
  return &Apache::lontexconvert::jsMath_header();   return &Apache::lontexconvert::jsMath_header();
     }      }
       &Apache::lontexconvert::MathJax_push();
       if (lc(&tex_engine()) eq 'mathjax') { # ||
           #($inherit_jsmath && &jsMath_state(-2))) {
           return &Apache::lontexconvert::MathJax_header();
       }
     return;      return;
 }  }
   
 sub mimetex_valign {  sub mimetex_valign {
     my ($esc_texstring)=@_;      my ($esc_texstring)=@_;
     my $valign = 0;      my $valign = 0;
     my $lonhost = $Apache::lonnet::perlvar{'lonHostID'};  
     my $hostname = &Apache::lonnet::hostname($lonhost);  
     my $protocol = $Apache::lonnet::protocol{$lonhost};  
     my $path = '/cgi-bin/mimetex.cgi?'.$esc_texstring;      my $path = '/cgi-bin/mimetex.cgi?'.$esc_texstring;
     my $socket;      my $socket;
     &Apache::lonxml::start_alarm();      &Apache::lonxml::start_alarm();
     if ($protocol eq 'https') {      $socket = IO::Socket::INET->new(PeerAddr => 'localhost',
         $socket = IO::Socket::SSL->new(PeerAddr => $hostname,                                      PeerPort => 'http(80)',
                                        PeerPort => 'https(443)',                                      Proto    => 'tcp');
                                        Proto    => 'tcp');  
     } else {  
         $socket = IO::Socket::INET->new(PeerAddr => $hostname,  
                                         PeerPort => 'http(80)',  
                                         Proto    => 'tcp');  
     }  
     if ($socket) {      if ($socket) {
         my $headreq = "HEAD $path HTTP/1.0 User-Agent: Mozilla/5.0 \r\n\r\n";          my $headreq = "HEAD $path HTTP/1.0\r\n\r\n";
         print $socket $headreq;          print $socket $headreq;
         while (<$socket>) {          while (<$socket>) {
             if (/Vertical\-Align\:\s*?([\-\d]+)/) {              if (/Vertical\-Align\:\s*?([\-\d]+)/) {
                 $valign = $1;                  $valign = $1;
             }              }
         }          }
         if ($protocol eq 'https') {          $socket->close();
             $socket->close(SSL_no_shutdown => 1,  
                            SSL_ctx_free => 1);  
         } else {  
             $socket->close();  
         }  
     }      }
     &Apache::lonxml::end_alarm();      &Apache::lonxml::end_alarm();
     return $valign;      return $valign;
Line 282  sub mimetex_valign { Line 382  sub mimetex_valign {
   
 sub mimetex_converted {  sub mimetex_converted {
     my $texstring=shift;      my $texstring=shift;
   
   # Alt-Argument for screen readers
       my $alt_string=$$texstring;
       $alt_string=~s/\"/\'\'/g;
   
   # Is this displaystyle?
   
     my $displaystyle=&displaystyle($texstring);      my $displaystyle=&displaystyle($texstring);
   
   # Remove math environment delimiters
   
     &clean_out_math_mode($texstring);      &clean_out_math_mode($texstring);
   
     if ($displaystyle) {      if ($displaystyle) {
Line 291  sub mimetex_converted { Line 400  sub mimetex_converted {
     }      }
     my $esc_texstring = &uri_escape($$texstring);      my $esc_texstring = &uri_escape($$texstring);
     my $valign = &mimetex_valign($esc_texstring);      my $valign = &mimetex_valign($esc_texstring);
     my $result='<img src="/cgi-bin/mimetex.cgi?'.$esc_texstring.'" style="vertical-align:'.$valign.'px" alt="$'.$$texstring.'$" />';      my $result='<img src="/cgi-bin/mimetex.cgi?'.$esc_texstring.'" style="vertical-align:'.$valign.'px" alt="'.$alt_string.'" />';
     if ($displaystyle) {      if ($displaystyle) {
  $result='<center>'.$result.'</center>';   $result='<div style="text-align:center">'.$result.'</div>';
     }      }
     return $result;      return $result;
 }  }
Line 305  sub converted { Line 414  sub converted {
  return &tth_converted($string);   return &tth_converted($string);
     } elsif ($mode =~ /jsmath/i) {      } elsif ($mode =~ /jsmath/i) {
  return &jsMath_converted($string);   return &jsMath_converted($string);
       } elsif ($mode =~ /mathjax/i) {
    return &MathJax_converted($string);
     } elsif ($mode =~ /mimetex/i) {      } elsif ($mode =~ /mimetex/i) {
  return &mimetex_converted($string);   return &mimetex_converted($string);
       } elsif ($mode =~ /raw/i) {
           return $$string;
     }      }
     return &tth_converted($string);      return &tth_converted($string);
 }  }
Line 315  sub converted { Line 428  sub converted {
   
 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 323  sub to_convert { Line 437  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 my $smiley (keys(%smileys)) {      foreach my $smiley (keys(%smileys)) {
  $expression=~s/$smiley/\<img src="$iconpath\/$smileys{$smiley}.gif" \/\>/gs;    $expression=~s/$smiley/\<img src="$iconpath\/$smileys{$smiley}" \/\>/gs; 
     }      }
     return $expression;      return $expression;
 }  }
Line 348  sub smiley { Line 475  sub smiley {
 sub msgtexconverted {  sub msgtexconverted {
     my ($message,$email) = @_;      my ($message,$email) = @_;
     $errorstring='';      $errorstring='';
     &init_tth();  
     my $outmessage='';      my $outmessage='';
     my $tex=0;      my $tex=0;
     foreach my $fragment (split(/(?:\&lt\;|\<)\/*m\s*(?:\&gt\;|\>)/i,$message)) {      foreach my $fragment (split(/(?:\&lt\;|\<)\/*m\s*(?:\&gt\;|\>)/i,$message)) {
Line 369  sub msgtexconverted { Line 495  sub msgtexconverted {
     foreach my $fragment (split(/(?:\&lt\;|\<)\/*algebra\s*(?:\&gt\;|\>)/i,      foreach my $fragment (split(/(?:\&lt\;|\<)\/*algebra\s*(?:\&gt\;|\>)/i,
  $message)) {   $message)) {
  if ($tex) {   if ($tex) {
           my $algebra = &algebra($fragment, 'web', undef, undef, undef, undef, 'tth');
     if ($email) {      if ($email) {
  $outmessage.='</pre><tt>'.&algebra($fragment,'web').'</tt><pre>';   $outmessage.='</pre><tt>'.$algebra.'</tt><pre>';
  $tex=0;   $tex=0;
     } else {      } else {
  $outmessage.=&algebra($fragment,'web');   $outmessage.=$algebra;
  $tex=0;   $tex=0;
     }      }
  } else {   } else {
             $outmessage.=$fragment;          $outmessage.=$fragment;
     $tex=1;      $tex=1;
  }   }
     }      }
Line 390  sub msgtexconverted { Line 517  sub msgtexconverted {
   
 sub algebra {  sub algebra {
     use AlgParser;      use AlgParser;
       my ($string,$target,$style,$parstack,$safeeval,$tth)=@_;
     my ($string,$target,$style,$parstack,$safeeval)=@_;  
     my $parser = new AlgParserWithImplicitExpand;      my $parser = new AlgParserWithImplicitExpand;
       if ($tth eq 'tth') {&init_tth();}
     $string=&prepare_algebra($string);      $string=&prepare_algebra($string);
     my $ret = $parser->parse($string);      my $ret = $parser->parse($string);
     my $result='['.&mt('Algebra unconverted due to previous errors').']';      my $result='['.&mt('Algebra unconverted due to previous errors').']';
Line 497  Header Line 624  Header
   
 =item jsMath_converted()  =item jsMath_converted()
   
   =item MathJax_converted()
    - Mimics the jsMath functionality
   
 =item tex_engine()  =item tex_engine()
   
   
 =item init_math_support()  =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 mimetex_converted()
   
Removed from v.1.94  
changed lines
  Added in v.1.112

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