Diff for /loncom/xml/londefdef.pm between versions 1.151 and 1.256

version 1.151, 2003/07/08 18:12:28 version 1.256, 2005/02/10 23:00:09
Line 25 Line 25
 # /home/httpd/html/adm/gpl.txt  # /home/httpd/html/adm/gpl.txt
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  ## Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
 # Copyright for TtHfunc and TtMfunc by Ian Hutchinson.   
 # TtHfunc and TtMfunc (the "Code") may be compiled and linked into   # TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
 # binary executable programs or libraries distributed by the   # binary executable programs or libraries distributed by the 
 # Michigan State University (the "Licensee"), but any binaries so   # Michigan State University (the "Licensee"), but any binaries so 
Line 37 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.
 #  #
 #  
 # last modified 06/26/00 by Alexander Sakharuk  
 # 11/6,11/30,02/01/01,5/4 Gerd Kortemeyer  
 # 01/18 Alex Sakharuk  
   
 package Apache::londefdef;   package Apache::londefdef; 
   
Line 51  use Apache::File(); Line 46  use Apache::File();
 use Image::Magick;  use Image::Magick;
 use Apache::lonmenu();  use Apache::lonmenu();
 use Apache::lonmeta();  use Apache::lonmeta();
   use Apache::Constants qw(:common);
   
   
 BEGIN {  BEGIN {
   
Line 58  BEGIN { Line 55  BEGIN {
   
 }  }
   
   sub initialize_londefdef {
       $Apache::londefdef::TD_redirection=0;
       @Apache::londefdef::table = ();
       $Apache::londefdef::select=0;
       undef(@Apache::londefdef::description);
       @Apache::londefdef::DD=(0);
       @Apache::londefdef::DT=(0);
       @Apache::londefdef::seenDT=(0);
       $Apache::londefdef::list_index=0;
   }
   
 #======================= TAG SUBROUTINES =====================  #======================= TAG SUBROUTINES =====================
 #-- <output>  #-- <output>
 sub start_output {  sub start_output {
Line 72  sub end_output { Line 80  sub end_output {
 }  }
 #-- <m> tag  #-- <m> tag
 sub start_m {  sub start_m {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
  $Apache::lonxml::prevent_entity_encode++;      if ($target eq 'web' || $target eq 'analyze') {
  my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);  
  $inside ='\\documentstyle{article}'.$inside;   $inside ='\\documentstyle{article}'.$inside;
  &Apache::lonxml::debug("M is starting with:$inside:");   &Apache::lonxml::debug("M is starting with:$inside:");
  my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);   my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
Line 91  sub start_m { Line 98  sub start_m {
     $Apache::lontexconvert::errorstring='';      $Apache::lontexconvert::errorstring='';
  }   }
  #&Apache::lonxml::debug("M is ends with:$currentstring:");   #&Apache::lonxml::debug("M is ends with:$currentstring:");
    $Apache::lonxml::post_evaluate=0;
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);   $currentstring = $inside;
    my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
    if ($eval eq 'on') {
       $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
    }
  if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}   if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
     } else {   $Apache::lonxml::post_evaluate=0;
  my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);  
     }      }
     return $currentstring;      return $currentstring;
 }  }
Line 103  sub start_m { Line 114  sub start_m {
 sub end_m {  sub end_m {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'tex') {
  $Apache::lonxml::prevent_entity_encode--;  
     } elsif ($target eq 'tex') {  
  $currentstring = "";   $currentstring = "";
     } elsif ($target eq 'meta') {  
     }      }
     return $currentstring;      return $currentstring;
 }  }
Line 133  sub end_tthoption { Line 141  sub end_tthoption {
     return $result;      return $result;
 }  }
   
 #-- <html> tag      #-- <html> tag (end tag optional)
 sub start_html {  sub start_html {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($ENV{'browser.mathml'}) {      my $options=$ENV{'course.'.$ENV{'request.course.id'}.'.tthoptions'};
  &tth::ttminit();      &Apache::lontexconvert::init_tth();
  if ($ENV{'browser.unicode'}) {      if ($target eq 'web' || $target eq 'edit') {
     &tth::ttmoptions('-L -u1');   $currentstring = &Apache::lonxml::xmlbegin();
  } else {  
     &tth::ttmoptions('-L -u0');  
  }  
     } else {  
  &tth::tthinit();  
  if ($ENV{'browser.unicode'}) {  
     &tth::tthoptions('-L -u1');  
  } else {  
     &tth::tthoptions('-L -u0');  
  }  
     }  
     if ($target eq 'web') {  
  $currentstring = &Apache::lonxml::xmlbegin().  
     &Apache::lonxml::fontsettings();       
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  @Apache::londefdef::table = ();   @Apache::londefdef::table = ();
  $currentstring .= '\documentclass[letterpaper]{article}'.   $currentstring .= '\documentclass[letterpaper]{article}';
                            #'\batchmode'.   if (($ENV{'form.latex_type'}=~'batchmode') ||
                            '\newcommand{\keephidden}[1]{}              (!$ENV{'request.role.adv'})) {$currentstring .='\batchmode';} 
                            \renewcommand{\deg}{$^{\circ}$}   $currentstring .= '\newcommand{\keephidden}[1]{}'.
                            \usepackage{longtable}                            '\renewcommand{\deg}{$^{\circ}$}'.
                            \usepackage{textcomp}                            '\usepackage{longtable}'.
                            \usepackage[dvips]{graphicx}                            '\usepackage{textcomp}'.
                            \usepackage{epsfig}\usepackage{calc}                            '\usepackage{makeidx}'.
 \newenvironment{choicelist}{\begin{list}{}{\setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.05in}\setlength{\itemsep}{0.022in}\setlength{\parsep}{0in}\setlength{\belowdisplayskip}{0.04in}\setlength{\abovedisplayskip}{0.05in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.04in}}}{\end{list}}';                            '\usepackage[dvips]{graphicx}'.
     '\usepackage{picins}'.
                             '\usepackage{epsfig}'.
                             '\usepackage{calc}'.
                             '\usepackage{amsmath}'.
                             '\usepackage{amssymb}'.
                             '\usepackage{amsfonts}'.
                             '\usepackage{amsthm}'.
                             '\usepackage{amscd}'.
                             '\newenvironment{choicelist}{\begin{list}{}{\setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.05in}\setlength{\itemsep}{0.022in}\setlength{\parsep}{0in}\setlength{\belowdisplayskip}{0.04in}\setlength{\abovedisplayskip}{0.05in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.04in}}}{\end{list}}'.
                             '\renewenvironment{theindex}{\begin{list}{}{{\vskip 1mm \noindent \large\textbf{Index}} \newline \setlength{\rightmargin}{0in}\setlength{\leftmargin}{0.13in}\setlength{\topsep}{0.01in}\setlength{\itemsep}{0.1in}\setlength{\parsep}{-0.02in}\setlength{\belowdisplayskip}{0.01in}\setlength{\abovedisplayskip}{0.01in}\setlength{\abovedisplayshortskip}{-0.04in}\setlength{\belowdisplayshortskip}{0.01in}}}{\end{list}}';
     }      }
     return $currentstring;      return $currentstring;
 }  }
   
 sub end_html {  sub end_html {
     my ($target,$token) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = &Apache::lonxml::xmlend();   $currentstring = &Apache::lonxml::xmlend($target,$parser);
     }      }
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <head> tag  #-- <head> tag (end tag optional)
 sub start_head {  sub start_head {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4].&Apache::lonxml::fontsettings();
     }       } 
     return $currentstring;      return $currentstring;
 }  }
Line 192  sub start_head { Line 196  sub start_head {
 sub end_head {  sub end_head {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web' && $ENV{'request.state'} eq 'published') {
  $currentstring = &Apache::lonmenu::registerurl(undef,$target).   $currentstring = &Apache::lonmenu::registerurl(undef,$target).
     $token->[2];          $token->[2];    
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <map> tag  #-- <map> tag (end tag required)
 sub start_map {  sub start_map {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 218  sub end_map { Line 222  sub end_map {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <select> tag  #-- <select> tag (end tag required)
 sub start_select {  sub start_select {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     }       }  elsif ($target eq 'tex') {
    $Apache::londefdef::select=0;
       }
     return $currentstring;      return $currentstring;
 }  }
   
Line 237  sub end_select { Line 243  sub end_select {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <option> tag  #-- <option> tag (end tag optional)
 sub start_option {  sub start_option {
     my ($target,$token) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     }       } elsif ($target eq 'tex') {
    $Apache::londefdef::select++;
    if ($Apache::londefdef::select == 1) {
       $currentstring='\noindent\fbox{'.&Apache::lonxml::get_param('value',$parstack,$safeeval).'}\keephidden{';
    } else {
       $currentstring='\keephidden{';
    }
       }
     return $currentstring;      return $currentstring;
 }  }
   
Line 252  sub end_option { Line 265  sub end_option {
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];       $currentstring = $token->[2];    
     }       }  elsif ($target eq 'tex') {
    $currentstring='}';
       }
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <input> tag  #-- <input> tag (end tag forbidden)
 sub start_input {  sub start_input {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 275  sub end_input { Line 290  sub end_input {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <textarea> tag  #-- <textarea> tag (end tag required)
 sub start_textarea {  sub start_textarea {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 294  sub end_textarea { Line 309  sub end_textarea {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <form> tag  #-- <form> tag (end tag required)
 sub start_form {  sub start_form {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 313  sub end_form { Line 328  sub end_form {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <title> tag  #-- <title> tag (end tag required)
 sub start_title {  sub start_title {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= '\keephidden{'    $currentstring .= '\keephidden{Title of the document:  ' 
     }      }
     if ($target eq 'meta') {      if ($target eq 'meta') {
  $currentstring='<title>';   $currentstring='<title>';
  &start_output();   &start_output($target);
     }      }
     return $currentstring;      return $currentstring;
 }  }
Line 338  sub end_title { Line 353  sub end_title {
  $currentstring .= '}';   $currentstring .= '}';
     }        }  
     if ($target eq 'meta') {      if ($target eq 'meta') {
  &end_output();   &end_output($target);
  $currentstring='</title>';   $currentstring='</title>';
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <meta> tag  #-- <meta> tag (end tag forbidden)
 sub start_meta {  sub start_meta {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 364  sub start_meta { Line 379  sub start_meta {
     $name=~s/\s/\_/gs;      $name=~s/\s/\_/gs;
     $name=~s/\W//gs;      $name=~s/\W//gs;
     if ($name) {      if ($name) {
  $currentstring='<'.$name.'>'.   $currentstring='<'.$name;
                    my $display=&Apache::lonxml::get_param
    ('display',$parstack,$safeeval,undef,1);
                   if ($display) {
                       $display=~s/\"/\'/g;
       $currentstring.=' display="'.$display.'"';
                   }
    $currentstring.='>'.
     &Apache::lonxml::get_param      &Apache::lonxml::get_param
  ('content',$parstack,$safeeval,undef,1).   ('content',$parstack,$safeeval,undef,1).
  '</'.$name.'>';   '</'.$name.'>';
     }      }
               my $display=&Apache::lonxml::get_param
    ('display',$parstack,$safeeval,undef,1);
               if ($display) {
    $display=&HTML::Entities::encode($display,'<>&"');
    $currentstring.='<'.$name.'.display>'.$display.
                                  '</'.$name.'.display>';
               }
  }   }
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);   my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
Line 381  sub start_meta { Line 410  sub start_meta {
 }  }
   
 sub end_meta {  sub end_meta {
     my ($target,$token,$tagstack,$parstack,$parser) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  my $args='';   my $args='';
Line 390  sub end_meta { Line 419  sub end_meta {
     $currentstring = $token->[4];      $currentstring = $token->[4];
  }   }
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring=&Apache::lonxml::endredirection();   my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
  $currentstring='';   my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
    if ((not defined $content) && (not defined $name)) {
       &Apache::lonxml::endredirection();
    }
     }      }
     return $currentstring;      return $currentstring;
 }  }
Line 441  sub end_accessrule { Line 473  sub end_accessrule {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <body> tag  #-- <body> tag (end tag required)
 sub start_body {  sub start_body {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
   
     if ($target eq 'web') {      if ($target eq 'web') {
  if (!$Apache::lonxml::registered) {   if ($Apache::lonhomework::parsing_a_problem) {
       &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
       return '';
    }
    if (!$Apache::lonxml::registered && 
       $ENV{'request.state'} eq 'published') {
     $currentstring.='<head>'.      $currentstring.='<head>'.
  &Apache::lonmenu::registerurl(undef,$target).'</head>';   &Apache::lonmenu::registerurl(undef,$target).'</head>';
  }   }
   # Accessibility
    if ($ENV{'browser.imagesuppress'} eq 'on') {
       delete($token->[2]->{'background'});
    }
    if ($ENV{'browser.fontenhance'} eq 'on') {
       my $style='';
       foreach my $key (keys(%{$token->[2]})) {
    if ($key =~ /^style$/i) {
       $style.=$token->[2]->{$key}.';';
       delete($token->[2]->{$key});
    }
       }
       $token->[2]->{'style'}=$style.'; font-size: x-large;';
    }
    if ($ENV{'browser.blackwhite'} eq 'on') {
       delete($token->[2]->{'font'});
       delete($token->[2]->{'link'});
       delete($token->[2]->{'alink'});
       delete($token->[2]->{'vlink'});
       delete($token->[2]->{'bgcolor'});
       delete($token->[2]->{'background'});
    }
   # Overload loads
  my $onLoad='';   my $onLoad='';
  foreach my $key (keys(%{$token->[2]})) {   foreach my $key (keys(%{$token->[2]})) {
     if ($key =~ /^onload$/i) {      if ($key =~ /^onload$/i) {
Line 468  sub start_body { Line 529  sub start_body {
  $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().   $token->[2]->{'onunload'}=&Apache::lonmenu::unloadevents().
     ';'.$onUnload;      ';'.$onUnload;
   
  $currentstring .= '<'.$token->[1];   if ($ENV{'request.state'} ne 'construct') {
       $currentstring .= '<'.$token->[1];
    }
  foreach (keys %{$token->[2]}) {   foreach (keys %{$token->[2]}) {
     $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';      $currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
  }   }
  $currentstring.='>';   if ($ENV{'request.state'} ne 'construct') {
       $currentstring.='>';
    }
  if ($ENV{'request.state'} ne 'published') {   if ($ENV{'request.state'} ne 'published') {
       my $remote=($ENV{'environment.remote'} ne 'off');
       $currentstring=&Apache::loncommon::bodytag(undef,undef,
          $currentstring,$remote);
     $currentstring.=(<<EDITBUTTON);      $currentstring.=(<<EDITBUTTON);
  <form method="post">   <form method="post">
  <input type="submit" name="editmode" value="Edit" />   <input type="submit" name="editmode" accesskey="e" value="Edit" />
  </form>   </form>
 EDITBUTTON  EDITBUTTON
  } else {   } else {
     $currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1);      $currentstring.=&Apache::lonmenu::menubuttons(undef,$target,1);
  }   }
    $currentstring.=&Apache::lonxml::message_location();
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = '\begin{document}';     $currentstring = '\begin{document}';  
     }       } 
Line 494  sub end_body { Line 563  sub end_body {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];        $currentstring = $token->[2];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = '\end{document}';     $currentstring = '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';  
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <center> tag  #-- <center> tag (end tag required)
 sub start_center {  sub start_center {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 522  sub end_center { Line 591  sub end_center {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <b> tag  #-- <b> tag (end tag required)
 sub start_b {  sub start_b {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 545  sub end_b { Line 614  sub end_b {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <strong> tag  #-- <strong> tag (end tag required)
 sub start_strong {  sub start_strong {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 560  sub start_strong { Line 629  sub start_strong {
 sub end_strong {  sub end_strong {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
   
  $currentstring = $token->[2];        $currentstring = $token->[2];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = '}';     $currentstring = '}';  
Line 569  sub end_strong { Line 637  sub end_strong {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <h1> tag  #-- <h1> tag (end tag required)
 sub start_h1 {  sub start_h1 {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 577  sub start_h1 { Line 645  sub start_h1 {
  $currentstring .= $token->[4];   $currentstring .= $token->[4];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $pre;   my $pre;
  my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);   my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
  if (($align eq 'center') || (not defined $align)) {   if ($align eq 'center') {
     $pre='\begin{center}';      $pre='\begin{center}';
  } elsif ($align eq 'left') {   } elsif ($align eq 'left') {
     $pre='\rlap{';      $pre='\rlap{';
Line 590  sub start_h1 { Line 658  sub start_h1 {
  $currentstring .= $pre.'{\\'.$TeXsize.' \textbf{';    $currentstring .= $pre.'{\\'.$TeXsize.' \textbf{'; 
     } elsif ($target eq 'meta') {      } elsif ($target eq 'meta') {
  $currentstring='<subject>';   $currentstring='<subject>';
  &start_output();   &start_output($target);
     }      }
     return $currentstring;      return $currentstring;
 }  }
Line 601  sub end_h1 { Line 669  sub end_h1 {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $post;   my $post='\vskip 0 mm ';
  my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);   my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
  if (($align eq 'center') || (not defined $align)) {   if ($align eq 'center') {
     $post='\end{center}';      $post='\end{center}';
  } elsif ($align eq 'left') {   } elsif ($align eq 'left') {
     $post='} \hfill'.'\vskip 0 mm ';      $post='} \hfill'.'\vskip 0 mm ';
Line 612  sub end_h1 { Line 680  sub end_h1 {
  }   }
  $currentstring .= '}}'.$post;   $currentstring .= '}}'.$post;
     } elsif ($target eq 'meta') {      } elsif ($target eq 'meta') {
  &end_output();   &end_output($target);
  $currentstring='</subject>';   $currentstring='</subject>';
     }       } 
     return $currentstring;      return $currentstring;
Line 627  sub start_h2 { Line 695  sub start_h2 {
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $pre;   my $pre;
  my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);   my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
  if (($align eq 'center') || (not defined $align)) {   if ($align eq 'center') {
     $pre='\begin{center}';      $pre='\begin{center}';
  } elsif ($align eq 'left') {   } elsif ($align eq 'left') {
     $pre='\rlap{';      $pre='\rlap{';
Line 647  sub end_h2 { Line 715  sub end_h2 {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $post;   my $post='\vskip 0 mm ';
  my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);   my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
  if (($align eq 'center') || (not defined $align)) {   if ($align eq 'center') {
     $post='\end{center}';      $post='\end{center}';
  } elsif ($align eq 'left') {   } elsif ($align eq 'left') {
     $post='} \hfill'.'\vskip 0 mm ';      $post='} \hfill'.'\vskip 0 mm ';
Line 670  sub start_h3 { Line 738  sub start_h3 {
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $pre;   my $pre;
  my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);   my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
  if (($align eq 'center') || (not defined $align)) {   if ($align eq 'center') {
     $pre='\begin{center}';      $pre='\begin{center}';
  } elsif ($align eq 'left') {   } elsif ($align eq 'left') {
     $pre='\rlap{';      $pre='\rlap{';
Line 690  sub end_h3 { Line 758  sub end_h3 {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $post;   my $post='\vskip 0 mm ';
  my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);   my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
  if (($align eq 'center') || (not defined $align)) {   if ($align eq 'center') {
     $post='\end{center}';      $post='\end{center}';
  } elsif ($align eq 'left') {   } elsif ($align eq 'left') {
     $post='} \hfill'.'\vskip 0 mm ';      $post='} \hfill'.'\vskip 0 mm ';
Line 713  sub start_h4 { Line 781  sub start_h4 {
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $pre;   my $pre;
  my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);   my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
  if (($align eq 'center') || (not defined $align)) {   if ($align eq 'center') {
     $pre='\begin{center}';      $pre='\begin{center}';
  } elsif ($align eq 'left') {   } elsif ($align eq 'left') {
     $pre='\rlap{';      $pre='\rlap{';
Line 733  sub end_h4 { Line 801  sub end_h4 {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $post;   my $post='\vskip 0 mm ';
  my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);   my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
  if (($align eq 'center') || (not defined $align)) {   if ($align eq 'center') {
     $post='\end{center}';      $post='\end{center}';
  } elsif ($align eq 'left') {   } elsif ($align eq 'left') {
     $post='} \hfill'.'\vskip 0 mm ';      $post='} \hfill'.'\vskip 0 mm ';
Line 756  sub start_h5 { Line 824  sub start_h5 {
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $pre;   my $pre;
  my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);   my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
  if (($align eq 'center') || (not defined $align)) {   if ($align eq 'center') {
     $pre='\begin{center}';      $pre='\begin{center}';
  } elsif ($align eq 'left') {   } elsif ($align eq 'left') {
     $pre='\rlap{';      $pre='\rlap{';
Line 776  sub end_h5 { Line 844  sub end_h5 {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $post;   my $post='\vskip 0 mm ';
  my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);   my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
  if (($align eq 'center') || (not defined $align)) {   if ($align eq 'center') {
     $post='\end{center}';      $post='\end{center}';
  } elsif ($align eq 'left') {   } elsif ($align eq 'left') {
     $post='} \hfill'.'\vskip 0 mm ';      $post='} \hfill'.'\vskip 0 mm ';
Line 799  sub start_h6 { Line 867  sub start_h6 {
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $pre;   my $pre;
  my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);   my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
  if (($align eq 'center') || (not defined $align)) {   if ($align eq 'center') {
     $pre='\begin{center}';      $pre='\begin{center}';
  } elsif ($align eq 'left') {   } elsif ($align eq 'left') {
     $pre='\rlap{';      $pre='\rlap{';
Line 819  sub end_h6 { Line 887  sub end_h6 {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $post;   my $post='\vskip 0 mm ';
  my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);   my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
  if (($align eq 'center') || (not defined $align)) {   if ($align eq 'center') {
     $post='\end{center}';      $post='\end{center}';
  } elsif ($align eq 'left') {   } elsif ($align eq 'left') {
     $post='} \hfill'.'\vskip 0 mm ';      $post='} \hfill'.'\vskip 0 mm ';
Line 833  sub end_h6 { Line 901  sub end_h6 {
     return $currentstring;      return $currentstring;
 }  }
   
 #--- <cite> tag  #--- <cite> tag (end tag required)
 sub start_cite {  sub start_cite {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[4];   $currentstring .= $token->[4];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= "\\textit{";   $currentstring .= '\textit{';
     }      }
     return $currentstring;      return $currentstring;
 }  }
Line 851  sub end_cite { Line 919  sub end_cite {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= "}";   $currentstring .= '}';
     }      }
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <i> tag  #-- <i> tag (end tag required)
 sub start_i {  sub start_i {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 879  sub end_i { Line 947  sub end_i {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <address> tag  #-- <address> tag (end tag required)
 sub start_address {  sub start_address {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[4];   $currentstring .= $token->[4];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= "\\textit{";   $currentstring .= '\textit{';
     }      }
     return $currentstring;      return $currentstring;
 }  }
Line 897  sub end_address { Line 965  sub end_address {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= "}";   $currentstring .= '}';
     }      }
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <dfn> tag  #-- <dfn> tag (end tag required)
 sub start_dfn {  sub start_dfn {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[4];   $currentstring .= $token->[4];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= "\\textit{";   $currentstring .= '\textit{';
     }       } 
     return $currentstring;      return $currentstring;
 }  }
Line 920  sub end_dfn { Line 988  sub end_dfn {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= "}";   $currentstring .= '}';
     }      }
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <tt> tag  #-- <tt> tag (end tag required)
 sub start_tt {  sub start_tt {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 948  sub end_tt { Line 1016  sub end_tt {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <kbd> tag  #-- <kbd> tag (end tag required)
 sub start_kbd {  sub start_kbd {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[4];   $currentstring .= $token->[4];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= "\\texttt";   $currentstring .= '\texttt{';
     }      }
     return $currentstring;      return $currentstring;
 }  }
Line 966  sub end_kbd { Line 1034  sub end_kbd {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= "}";   $currentstring .= '}';
     }      }
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <code> tag  #-- <code> tag (end tag required)
 sub start_code {  sub start_code {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 994  sub end_code { Line 1062  sub end_code {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <em> tag  #-- <em> tag (end tag required)
 sub start_em {  sub start_em {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 1017  sub end_em { Line 1085  sub end_em {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <q> tag  #-- <q> tag (end tag required)
 sub start_q {  sub start_q {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[4];   $currentstring .= $token->[4];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= "\\emph{";   $currentstring .= '\emph{';
     }      }
     return $currentstring;      return $currentstring;
 }  }
Line 1035  sub end_q { Line 1103  sub end_q {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= "}";   $currentstring .= '}';
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <p> tag  #-- <p> tag (end tag optional)
   #optional attribute - align="center|left|right"
 sub start_p {  sub start_p {
     my ($target,$token) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[4];   $currentstring .= $token->[4];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= '\par ';   my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
    if ($align eq 'center') {
       $currentstring='\begin{center}\par';
    } elsif ($align eq 'right') {
       $currentstring='\makebox['.$ENV{'form.textwidth'}.']{\hfill\llap{';
    } elsif ($align eq 'left') {
       $currentstring='\noindent\makebox['.$ENV{'form.textwidth'}.']{\rlap{';
    } else {
               $currentstring='\par ';
           }
    my $signal=1;#<p> does not work inside <b>...</b> 
    foreach my $tag (@$tagstack) {if (lc($tag) eq 'b') {$signal=0;}
    if (!$signal) {$currentstring = '';}
    }
     }      }
     return $currentstring;      return $currentstring;
 }  }
   
 sub end_p {  sub end_p {
     my ($target,$token) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
       } elsif ($target eq 'tex') {
    my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
    if (not defined $align) {
       $currentstring.='\strut\\\\\strut ';
    } elsif ($align eq 'center') {
       $currentstring .= '\end{center}';
    } elsif ($align eq 'right') {
       $currentstring .= '}}';
    } elsif ($align eq 'left') {
       $currentstring .= '}\hfill}';
    } 
     }      }
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <br> tag  #-- <br> tag (end tag forbidden)
 sub start_br {  sub start_br {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[4];   $currentstring .= $token->[4];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  if ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {   my @tempo=@$tagstack;
     $currentstring .= '\vskip 0.2 mm ';   my $signal=0;
    for (my $i=$#tempo;$i>=0;$i--) {
       if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
                   ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul') ||
                   ($tempo[$i] eq 'td') || ($tempo[$i] eq 'th'))  {
    $signal=1;
    last;
       }
    }
    if ($signal) {
       $currentstring .= ' \vskip 0 mm ';
    } elsif ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
       $currentstring .= '\strut \\\\ \strut ';
  }   }
     }      }
     return $currentstring;      return $currentstring;
Line 1084  sub end_br { Line 1189  sub end_br {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <big> tag  #-- <big> tag (end tag required)
 sub start_big {  sub start_big {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 1107  sub end_big { Line 1212  sub end_big {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <small> tag  #-- <small> tag (end tag required)
 sub start_small {  sub start_small {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 1130  sub end_small { Line 1235  sub end_small {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <basefont> tag  #-- <basefont> tag (end tag forbidden)
 sub start_basefont {  sub start_basefont {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $currentstring = '';      my $currentstring = '';
Line 1159  sub end_basefont { Line 1264  sub end_basefont {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <font> tag  #-- <font> tag (end tag required)
 sub start_font {  sub start_font {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);   my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
  if ($face=~/symbol/i) {$Apache::lonxml::prevent_entity_encode++;}   if ($face!~/symbol/i) {
       if (($ENV{'browser.fontenhance'} eq 'on') || 
    ($ENV{'browser.blackwhite'} eq 'on')) { return ''; }
    }
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     }  elsif ($target eq 'tex') {      }  elsif ($target eq 'tex') {
  my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);   my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
Line 1180  sub end_font { Line 1288  sub end_font {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);  
  if ($face=~/symbol/i) {$Apache::lonxml::prevent_entity_encode--;}  
  $currentstring = $token->[2];       $currentstring = $token->[2];    
     }  elsif ($target eq 'tex') {      }  elsif ($target eq 'tex') {
  my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);   my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
Line 1192  sub end_font { Line 1298  sub end_font {
     return $currentstring;      return $currentstring;
 }  }
     
 #-- <strike> tag  #-- <strike> tag (end tag required)
 sub start_strike {  sub start_strike {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 1218  sub end_strike { Line 1324  sub end_strike {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <s> tag  #-- <s> tag (end tag required)
 sub start_s {  sub start_s {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 1244  sub end_s { Line 1350  sub end_s {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <sub> tag  #-- <sub> tag (end tag required)
 sub start_sub {  sub start_sub {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[4];   $currentstring .= $token->[4];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= "\$_{ ";   $currentstring .= '\ensuremath{_{';
     }       } 
     return $currentstring;      return $currentstring;
 }  }
Line 1262  sub end_sub { Line 1368  sub end_sub {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= " }\$";   $currentstring .= '}}';
     }      }
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <sup> tag  #-- <sup> tag (end tag required)
 sub start_sup {  sub start_sup {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[4];   $currentstring .= $token->[4];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= "\$^{ ";   $currentstring .= '\ensuremath{^{';
     }       } 
     return $currentstring;      return $currentstring;
 }  }
Line 1285  sub end_sup { Line 1391  sub end_sup {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring .= " }\$";   $currentstring .= '}}';
     }      }
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <hr> tag  #-- <hr> tag (end tag forbidden)
 sub start_hr {  sub start_hr {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 1330  sub end_hr { Line 1436  sub end_hr {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <div> tag  #-- <div> tag (end tag required)
 sub start_div {  sub start_div {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 1349  sub end_div { Line 1455  sub end_div {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <a> tag  #-- <a> tag (end tag required)
 sub start_a {  sub start_a {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[4];   my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
       undef,1);
    $currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);   my $a=&Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
  $a=~s/([^\\])%/$1\\\%/g;   my $b=&Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
  $currentstring .= '\ref{'.$a.'}';   if ($a=~/\S/) {
       $a=~s/([^\\])%/$1\\\%/g;
       $currentstring .= '\ref{URI: '.$a.'}';
    } elsif ($b=~/\S/) {
       $currentstring .= '\ref{Anchor: '.$b.'}';
    } else {
       $currentstring.='';
    }
     }      }
     return $currentstring;      return $currentstring;
 }  }
   
 sub end_a {  sub end_a {
     my ($target,$token,$tagstack,$parstack,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring .= $token->[2];   $currentstring .= $token->[2];
Line 1372  sub end_a { Line 1487  sub end_a {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <li> tag  #-- <li> tag (end tag optional)
 sub start_li {  sub start_li {
     my ($target,$token,$tagstack,$parstack,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my  $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,1);   my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
  if ($type=~/circle/) {   my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
     $currentstring .= ' \item[o] ';   #FIXME need to support types i and I 
    if ($type=~/disc/) {
       $currentstring .= ' \item[$\bullet$] ';
    } elsif ($type=~/circle/) {
       $currentstring .= ' \item[$\circ$] ';
  } elsif ($type=~/square/) {   } elsif ($type=~/square/) {
     $currentstring .= ' \item[$\Box$] ';      $currentstring .= ' \item[$\diamond$] ';
  } elsif ($type ne '') {    } elsif ($type eq '1') {
     $currentstring .= ' \item['.$type.'] ';      $currentstring .= ' \item['.($Apache::londefdef::list_index+1).'.]';
    } elsif ($type eq 'A') {
       $currentstring .= ' \item['.('A'..'Z')[$Apache::londefdef::list_index].'.]';
    } elsif ($type eq 'a') {
       $currentstring .= ' \item['.('a'..'z')[$Apache::londefdef::list_index].'.]';
    } elsif ($value ne '') {
       $currentstring .= ' \item['.$value.'] ';
  } else {   } else {
     $currentstring .= ' \item ';      $currentstring .= ' \item ';
  }     }  
     }    $Apache::londefdef::list_index++;
       }
     return $currentstring;      return $currentstring;
 }  }
   
Line 1402  sub end_li { Line 1528  sub end_li {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <u> tag  #-- <u> tag (end tag required)
 sub start_u {  sub start_u {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 1428  sub end_u { Line 1554  sub end_u {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <ul> tag  #-- <ul> tag (end tag required)
 sub start_ul {  sub start_ul {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 1436  sub start_ul { Line 1562  sub start_ul {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);   my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
    $Apache::londefdef::list_index=0;
  if ($TeXtype eq 'disc') {   if ($TeXtype eq 'disc') {
     $currentstring .= ' \renewcommand{\labelitemi}{$\bullet$}      $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
                                 \renewcommand{\labelitemii}{$\bullet$}                                 '\renewcommand{\labelitemii}{$\bullet$}'. 
                                 \renewcommand{\labelitemiii}{$\bullet$}                                '\renewcommand{\labelitemiii}{$\bullet$}'.
                                 \renewcommand{\labelitemiv}{$\bullet$}';                                '\renewcommand{\labelitemiv}{$\bullet$}';
  } elsif ($TeXtype eq 'circle') {   } elsif ($TeXtype eq 'circle') {
     $currentstring .= ' \renewcommand{\labelitemi}{$\circ$}      $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
                                 \renewcommand{\labelitemii}{$\circ$}                                 '\renewcommand{\labelitemii}{$\circ$}'. 
                                 \renewcommand{\labelitemiii}{$\circ$}                                '\renewcommand{\labelitemiii}{$\circ$}'.
                                 \renewcommand{\labelitemiv}{$\circ$}';                                '\renewcommand{\labelitemiv}{$\circ$}';
  } elsif ($TeXtype eq 'square') {   } elsif ($TeXtype eq 'square') {
     $currentstring .= ' \renewcommand{\labelitemi}{$\diamond$}      $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
                                 \renewcommand{\labelitemii}{$\diamond$}                                 '\renewcommand{\labelitemii}{$\diamond$}'. 
                                 \renewcommand{\labelitemiii}{$\diamond$}                                '\renewcommand{\labelitemiii}{$\diamond$}'.
                                 \renewcommand{\labelitemiv}{$\diamond$}';                                '\renewcommand{\labelitemiv}{$\diamond$}';
  }   }
  $currentstring .= '\begin{itemize}';     $currentstring .= '\strut \begin{itemize}';  
     }       } 
     return $currentstring;      return $currentstring;
 }  }
Line 1463  sub end_ul { Line 1590  sub end_ul {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];        $currentstring = $token->[2];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}   $currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
                                 \renewcommand{\labelitemii}{$\bullet$}                                  '\renewcommand{\labelitemii}{$\bullet$}'. 
                                 \renewcommand{\labelitemiii}{$\bullet$}                                 '\renewcommand{\labelitemiii}{$\bullet$}'.
                                 \renewcommand{\labelitemiv}{$\bullet$}';                                   '\renewcommand{\labelitemiv}{$\bullet$}\strut ';  
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <menu> tag  #-- <menu> tag (end tag required)
 sub start_menu {  sub start_menu {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 1494  sub end_menu { Line 1621  sub end_menu {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <dir> tag  #-- <dir> tag (end tag required)
 sub start_dir {  sub start_dir {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 1517  sub end_dir { Line 1644  sub end_dir {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <ol> tag  #-- <ol> tag (end tag required)
 sub start_ol {  sub start_ol {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
    $Apache::londefdef::list_index=0;
  my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);   my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
  if ($type eq '1') {   if ($type eq '1') {
     $currentstring .= ' \renewcommand{\labelenumi}{\arabic{enumi}.}      $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                                 \renewcommand{\labelenumii}{\arabic{enumii}.}                                 '\renewcommand{\labelenumii}{\arabic{enumii}.}'. 
                                 \renewcommand{\labelenumiii}{\arabic{enumiii}.}                                '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                                 \renewcommand{\labelenumiv}{\arabic{enumiv}.}';                                '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
  } elsif ($type eq 'A') {   } elsif ($type eq 'A') {
     $currentstring .= ' \renewcommand{\labelenumi}{\Alph{enumi}.}      $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
                                 \renewcommand{\labelenumii}{\Alph{enumii}.}                                 '\renewcommand{\labelenumii}{\Alph{enumii}.}'. 
                                 \renewcommand{\labelenumiii}{\Alph{enumiii}.}                                '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
                                 \renewcommand{\labelenumiv}{\Alph{enumiv}.}';                                '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
  } elsif ($type eq 'a') {   } elsif ($type eq 'a') {
     $currentstring .= ' \renewcommand{\labelenumi}{\alph{enumi}.}      $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
                                 \renewcommand{\labelenumii}{\alph{enumii}.}                                '\renewcommand{\labelenumii}{\alph{enumii}.}'.
                                 \renewcommand{\labelenumiii}{\alph{enumiii}.}                                '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
                                 \renewcommand{\labelenumiv}{\alph{enumiv}.} ';                                '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
  } elsif ($type eq 'i') {   } elsif ($type eq 'i') {
     $currentstring .= ' \renewcommand{\labelenumi}{\roman{enumi}.}      $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
                                 \renewcommand{\labelenumii}{\roman{enumii}.}                                '\renewcommand{\labelenumii}{\roman{enumii}.}'.
                                 \renewcommand{\labelenumiii}{\roman{enumiii}.}                                '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
                                 \renewcommand{\labelenumiv}{\roman{enumiv}.} ';                                '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
  } elsif ($type eq 'I') {   } elsif ($type eq 'I') {
     $currentstring .= ' \renewcommand{\labelenumi}{\Roman{enumi}.}      $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
                                 \renewcommand{\labelenumii}{\Roman{enumii}.}                                '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
                                 \renewcommand{\labelenumiii}{\Roman{enumiii}.}                                '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
                                 \renewcommand{\labelenumiv}{\Roman{enumiv}.} ';                                '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
  }   }
  $currentstring .= '\begin{enumerate}';     $currentstring .= '\strut \begin{enumerate}';  
     }       } 
     return $currentstring;      return $currentstring;
 }  }
Line 1562  sub end_ol { Line 1690  sub end_ol {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];        $currentstring = $token->[2];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = '\end{enumerate} \renewcommand{\labelenumi}{\arabic{enumi}.}   $currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
                                           \renewcommand{\labelenumii}{\arabic{enumii}.}                                          '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
                                           \renewcommand{\labelenumiii}{\arabic{enumiii}.}                                          '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
                                           \renewcommand{\labelenumiv}{\arabic{enumiv}.}';                                            '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';  
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <dl> tag  #-- <dl> tag (end tag required)
 sub start_dl {  sub start_dl {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = '\begin{description}';     $currentstring = '\begin{description}';
    $Apache::londefdef::DL++;
    push(@Apache::londefdef::description,[]);
    $Apache::londefdef::DD[$Apache::londefdef::DL]=0;
    $Apache::londefdef::DT[$Apache::londefdef::DL]=0;
    $Apache::londefdef::seenDT[$Apache::londefdef::DL]=0;
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 sub end_dl {  sub end_dl {
     my ($target,$token) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];        $currentstring = $token->[2];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = '\end{description}';     if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
    if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
    foreach my $element (@{$Apache::londefdef::description[-1]}) {
       $currentstring.=' '.$element.' ';
    }
    pop(@Apache::londefdef::description);
    $currentstring.='\end{description}';  
    delete($Apache::londefdef::DD[$Apache::londefdef::DL]);
    delete($Apache::londefdef::DT[$Apache::londefdef::DL]);
    delete($Apache::londefdef::seenDT[$Apache::londefdef::DL]);
    $Apache::londefdef::DL--;
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <dt> tag  #-- <dt> tag (end tag optional)
 sub start_dt {  sub start_dt {
     my ($target,$token) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring='';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = '\item[';     if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
    if ($Apache::londefdef::DD[-1]) { &end_dd(@_); }
    &Apache::lonxml::startredirection();
    $Apache::londefdef::DT[-1]++;
    $Apache::londefdef::seenDT[-1]=1;
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 sub end_dt {  sub end_dt {
     my ($target,$token) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];       $currentstring = $token->[2];    
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = ']';     if ($Apache::londefdef::DT[-1]) {
       my $data=&item_cleanup();
       push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
       $Apache::londefdef::DT[-1]--;
    }
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <dd> tag  sub item_cleanup {
       my $item=&Apache::lonxml::endredirection();
       $item=~s/\\begin{center}//g;
       $item=~s/\\end{center}//g;
       return $item;
   }
   
   #-- <dd> tag (end tag optional)
 sub start_dd {  sub start_dd {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  if ($$tagstack[-2] eq 'dl') {   if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
     $currentstring = ' \item [] ';     if ($Apache::londefdef::DD[-1]) { &end_dd(@_);}
  }   if (!$Apache::londefdef::seenDT[-1]) {
       push(@{$Apache::londefdef::description[-1]},'\item[\strut] \strut \vskip 0mm ');
    }
    push(@{$Apache::londefdef::description[-1]},'');
    $Apache::londefdef::description[-1]->[-1].=' \strut ';
    $Apache::londefdef::DD[-1]++;
    &Apache::lonxml::startredirection();
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 sub end_dd {  sub end_dd {
     my ($target,$token) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];       $currentstring = $token->[2];    
     }       }  elsif ($target eq 'tex') {
    $Apache::londefdef::description[-1]->[-1].=
       &Apache::lonxml::endredirection().' \vskip 0mm ';
    $Apache::londefdef::DD[-1]--;
       }
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <table> tag  #-- <table> tag (end tag required)
   #list of supported attributes: border,width,TeXwidth
 sub start_table {  sub start_table {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $textwidth='';      my ($textwidth,$currentstring)=('','');
     if (not defined @Apache::londefdef::table) {  
  $textwidth=&recalc($ENV{'form.textwidth'});  
  $textwidth=~/(\d+\.?\d*)/;  
  $textwidth=0.95*$1;  
     } else {  
  $textwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);  
     }  
     my $currentstring = '';  
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $aa = {};   my $aa = {};
  push @Apache::londefdef::table, $aa;    push @Apache::londefdef::table, $aa; 
  $Apache::londefdef::table[-1]{'row_number'} = -1;   $Apache::londefdef::table[-1]{'row_number'} = -1;
         #table's width          #maximum table's width (default coincides with text line length)
    if ($#Apache::londefdef::table==0) {
       $textwidth=&recalc($ENV{'form.textwidth'}); #result is always in mm
       $textwidth=~/(\d+\.?\d*)/;
       $textwidth=0.95*$1; #accounts "internal" LaTeX space for table frame
    } else {
       if ($Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]=~/\d/) {
    #the maximum width of nested table is determined by LATeX width of parent cell
    $textwidth=$Apache::londefdef::table[-2]{'TeXlen'}[$Apache::londefdef::table[-2]{'row_number'}][$Apache::londefdef::table[-2]{'counter_columns'}]; 
       } else {
                 #try to use all space not used before (minus 5% for LaTeX table internal) - rather silly
    $textwidth=$Apache::londefdef::table[-2]{'width'};
    for (my $i=0;$i<$Apache::londefdef::table[-2]{'counter_columns'};$i++) {
       $textwidth=$textwidth-$Apache::londefdef::table[-2]{'TeXlen'}[0][$i];
    }
       }
    }
  my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);   my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
  if (not defined $TeXwidth) {   if (not defined $TeXwidth) {
     my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,$safeeval,undef,1);      my $htmlwidth = &Apache::lonxml::get_param('width',$parstack,$safeeval,undef,1);
     if ($htmlwidth=~/%/) {      if ($htmlwidth=~/%/) {
                   $Apache::londefdef::table[-1]{'percent'}=1;
  $htmlwidth=~/(\d+)/;   $htmlwidth=~/(\d+)/;
  my $value=$1*$textwidth/100;   $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;;
  $Apache::londefdef::table[-1]{'width'}=$value;  
     } else {      } else {
  $Apache::londefdef::table[-1]{'width'}=$textwidth;   $Apache::londefdef::table[-1]{'width'}=$textwidth;
     }      }
  } elsif ($TeXwidth=~/%/) {   } elsif ($TeXwidth=~/%/) {
       $Apache::londefdef::table[-1]{'percent'}=1;
     $TeXwidth=~/(\d+)/;      $TeXwidth=~/(\d+)/;
     my $value=$1*$textwidth/100;              $Apache::londefdef::table[-1]{'width'}=$1*$textwidth/100;
             $Apache::londefdef::table[-1]{'width'}=$value;  
  } else {   } else {
     $Apache::londefdef::table[-1]{'width'}=$textwidth;      $Apache::londefdef::table[-1]{'forcetablewidth'}=1;
       $Apache::londefdef::table[-1]{'width'}=$TeXwidth;
  }           }        
         #table's border          #table's border
  my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval,undef,1);    my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval); 
           my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
  unless (defined $border) { $border = 0; }   unless (defined $border) { $border = 0; }
  if ($border) {    if ($border) { 
     $Apache::londefdef::table[-1]{'hinc'} = '\hline ';       $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
Line 1687  sub start_table { Line 1866  sub start_table {
     $Apache::londefdef::table[-1]{'vinc'} = '&';       $Apache::londefdef::table[-1]{'vinc'} = '&'; 
     $Apache::londefdef::table[-1]{'vvinc'} = '';      $Apache::londefdef::table[-1]{'vvinc'} = '';
  }   }
  $Apache::londefdef::table[-1]{'output'} = ' \noindent \begin{tabular} ';   if ($#Apache::londefdef::table==0) {
  $currentstring = '\keephidden{NEW TABLE ENTRY}';      $Apache::londefdef::table[-1]{'output'}='\strut\newline\strut\setlength{\tabcolsep}{1 mm}';
     }   }
    $Apache::londefdef::table[-1]{'output'}.=' \noindent \begin{tabular} ';
           $Apache::londefdef::table[-1]{'TeXlen'}=[];
           $Apache::londefdef::table[-1]{'objectlen'}=[];
           $Apache::londefdef::table[-1]{'objectsignal'}=[];
           $Apache::londefdef::table[-1]{'maxlen'}=[];
           $Apache::londefdef::table[-1]{'minlen'}=[];
           $Apache::londefdef::table[-1]{'content'}=[];
           $Apache::londefdef::table[-1]{'align'}=[];
           $currentstring='\keephidden{NEW TABLE ENTRY}';
      }
     return $currentstring;      return $currentstring;
 }  }
     
Line 1701  sub end_table { Line 1890  sub end_table {
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $inmemory = '';   my $inmemory = '';
  my $output = '';   my $output = '';
  #construct header of the table   my $WARNING='';
  my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};          #width of columns from TeXwidth attributes
  for (my $in=0;$in<=$Apache::londefdef::table[-1]{'counter_columns'};$in++) {   for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
     $header_of_table .= $Apache::londefdef::table[-1]{'columns'}[$in].$Apache::londefdef::table[-1]{'vvinc'};      for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
    if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]<$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn]) {
       $Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]=$Apache::londefdef::table[-1]{'TeXlen'}[$in][$jn];
    }
       }
  }   }
  $header_of_table .= '}';          #free space and number of empty columns
  #define the length of the table cells   my ($available_space,$empty_columns)=($Apache::londefdef::table[-1]{'width'},0);
  #always starts with TeXwidth (if defined everything else is ignored)   if ($#Apache::londefdef::table ne 0) {$available_space=0.9*$available_space;} 
  my @length_row_final = split(/,/,$Apache::londefdef::table[-1]{'TeXlengthrow'}[0]);   for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
  for (my $in=1;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {      if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]==0) {
     my @length_row = split(/,/,$Apache::londefdef::table[-1]{'TeXlengthrow'}[$in]);   $empty_columns++;
     for (my $jn=0;$jn<=$#length_row;$jn++) {      } else {
  if ($length_row_final[$jn]<$length_row[$jn]) {$length_row_final[$jn]=$length_row[$jn];}   $available_space=$available_space-$Apache::londefdef::table[-1]{'TeXlen'}[0][$jn];
     }      }
  }   }
  #continues trying estimate the width of raw data          #boundaries for contents columns
  my @length_raw_row = split(/,/,$Apache::londefdef::table[-1]{'lengthrow'}[0]);   my @min_len=();#columns can not be narrower 
  for (my $in=1;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {   my @max_len=();#maximum length of column
     my @length_row = split(/,/,$Apache::londefdef::table[-1]{'lengthrow'}[$in]);   for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
     for (my $jn=0;$jn<=$#length_row;$jn++) {   my ($localmin,$localmax)=(0,0);
  if ($length_raw_row[$jn]<$length_row[$jn]) {$length_raw_row[$jn]=$length_row[$jn];}   for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
     }      if ($localmin<$Apache::londefdef::table[-1]{'minlen'}[$in][$jn]) {
  }   $localmin=$Apache::londefdef::table[-1]{'minlen'}[$in][$jn];
         #comparing of TeXwidth and raw data width      }
  my $available_length=$Apache::londefdef::table[-1]{'width'};      if ($localmax<$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn]) {
  my $needed=0;   $localmax=$Apache::londefdef::table[-1]{'maxlen'}[$in][$jn];
  for (my $jn=0;$jn<=$#length_row_final;$jn++) {      }
     if ($length_row_final[$jn]!=0) {   }
  $available_length=$available_length-$length_row_final[$jn];   push @min_len, $localmin;
  $needed++;   push @max_len, $localmax;
     }   }
  }   for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
  $needed=$#length_row_final-$needed+1;      my $localmin=0,;
  for (my $jn=0;$jn<=$#length_row_final;$jn++) {      for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
     if ($length_row_final[$jn]==0) {   if ($localmin<$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn]) {
  if ($length_raw_row[$jn]<$available_length/3) {      $localmin=$Apache::londefdef::table[-1]{'objectlen'}[$in][$jn];
     $length_row_final[$jn]=$length_raw_row[$jn];   }
     $available_length=$available_length-$length_raw_row[$jn];      }
     $needed--;      if ($max_len[$jn]<$localmin) {
    $max_len[$jn]=$localmin;
        $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
       }#object size is bigger
       if ($min_len[$jn]<$localmin) {
    $min_len[$jn]=$localmin;
    $Apache::londefdef::table[-1]{'objectsignal'}[$jn]=1;
       }#object size is bigger
       if ($Apache::londefdef::table[-1]{'TeXlen'}[0][$jn]!=0) {
    $min_len[$jn]=0;
    $max_len[$jn]=0;
       }
    }
          #final adjustment of column width
    my @fwidth=@{$Apache::londefdef::table[-1]{'TeXlen'}[0]};#final width array
    my @adjust=();
           #step 1. adjustment by maximum value
    my $space_neeeded=0;
    for (my $jn=0;$jn<=$#max_len;$jn++) {
       $space_neeeded=$space_neeeded+$max_len[$jn];
    }
    if ($space_neeeded<=$available_space) {
       for (my $jn=0;$jn<=$#max_len;$jn++) {
    if ($fwidth[$jn]==0) {
       $fwidth[$jn]=$max_len[$jn];
    }
       }
    } else {
           #step 2. adjustment by minimum value (estimation)
       $space_neeeded=0;
       for (my $jn=0;$jn<=$#min_len;$jn++) {
    $space_neeeded+=$min_len[$jn];
       }
       if ($space_neeeded>$available_space) {
    $WARNING=' \textbf{NOT ENOUGH SPACE FOR TABLE} ';
    for (my $jn=0;$jn<=$#max_len;$jn++) {
       if ($fwidth[$jn]==0) {
    $fwidth[$jn]=$min_len[$jn];
       }
    }
    #check if we have objects which can be scaled
    my $how_many_to_scale=0;
    my @to_scale=();
    for (my $jn=0;$jn<=$#max_len;$jn++) {
       if ($Apache::londefdef::table[-1]{'objectsignal'}[$jn] eq '1') {
    $how_many_to_scale++;
    push @to_scale, $jn;
       }
    }
    if ($how_many_to_scale>0) {
       my $space_to_adjust=($space_neeeded-$available_space)/$how_many_to_scale;
       foreach my $jn (@to_scale) {
    for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
       $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/;
       if ($1 ne '') {
    my $current_length=&recalc($1);
    $current_length=~/(\d+\.?\d*)/;
    $current_length=$current_length-$space_to_adjust;
    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/width=$current_length mm/;
       }
       $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~m/\[(\d+\.?\d*)\s*mm\]/;
       if ($1 ne '') {
    my $current_length=$1;
    $current_length=$current_length-$space_to_adjust;
    $Apache::londefdef::table[-1]{'content'}[$in][$jn]=~s/\[(\d+\.?\d*)\s*mm\]/\[$current_length mm\]/;
       }
    }
    $fwidth[$jn]=$fwidth[$jn]-$space_to_adjust;
       }
    }
       } else {
         #step 3. adjustment over minimal + corrections
    my $enlarge_coef=$available_space/$space_neeeded;
    my $acsessive=0;
    for (my $jn=0;$jn<=$#min_len;$jn++) {
       $adjust[$jn]=$min_len[$jn]*$enlarge_coef;
       if ($adjust[$jn]>$max_len[$jn]) {
    $fwidth[$jn]=$max_len[$jn];
    $acsessive=$acsessive+$adjust[$jn]-$max_len[$jn];
    $adjust[$jn]=0;
       }
    }
    if ($acsessive>0) {
    #we have an excess of space and can redistribute it
       my $notempty_columns=0;
       for (my $jn=0;$jn<=$#min_len;$jn++) {
    if ($adjust[$jn]!=0) {
       $notempty_columns++;
    }
       }
       my $per_column=$acsessive/$notempty_columns;
       for (my $jn=0;$jn<=$#min_len;$jn++) {
    if ($adjust[$jn]!=0) {
       $adjust[$jn]+=$per_column;
       $fwidth[$jn]=$adjust[$jn];
    }
       }
    } else {
       for (my $jn=0;$jn<=$#min_len;$jn++) {
    $fwidth[$jn]=$adjust[$jn];
       }
  }   }
     }      }
  }   }
  for (my $jn=0;$jn<=$#length_row_final;$jn++) {          #use all available width if it is defined in % or as TeXwidth
     if ($length_row_final[$jn]==0) {          if (($Apache::londefdef::table[-1]{'percent'}==1) || ($Apache::londefdef::table[-1]{'forcetablewidth'}==1)) {
  $length_row_final[$jn]=0.9*$available_length/$needed;      my $current=0; 
       for (my $i=0;$i<=$#fwidth;$i++) {  
    $current+=$fwidth[$i];
       }
       my $coef=$Apache::londefdef::table[-1]{'width'}/$current;
       for (my $i=0;$i<=$#fwidth;$i++) {  
    $fwidth[$i]*=$coef;
       }
    }
           #removing of empty columns if allowed
           my $permission=&Apache::lonxml::get_param('TeXDropEmptyColumns',$parstack,$safeeval,undef,0);
    if ($permission eq 'yes') {
       my @cleaned_table=();
               my @cleaned_header=();
       my $colind=0;
       for (my $jn=0;$jn<=$Apache::londefdef::table[-1]{'counter_columns'};$jn++) {
    if ($fwidth[$jn]!=0) {
       #we need to copy column
       for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
    $cleaned_table[$in][$colind]=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
    $cleaned_header[$colind]=$fwidth[$jn];
       }
       $colind++;
    }
     }      }
       $Apache::londefdef::table[-1]{'content'}=\@cleaned_table;
       @fwidth=@cleaned_header;
  }   }
    #construct header of the table
    my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
    for (my $in=0;$in<=$#fwidth;$in++) {
       $header_of_table.='p{'.$fwidth[$in].' mm}'.$Apache::londefdef::table[-1]{'vvinc'};
    }
    $header_of_table .= '}';
  #fill the table   #fill the table
  for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {   for (my $in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
     for (my $jn=0;$jn<=$#length_row_final;$jn++) {      for (my $jn=0;$jn<=$#fwidth;$jn++) {
  my $substituted=$length_row_final[$jn];   if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
  $Apache::londefdef::table[-1]{'rowdata'}[$in]=~s/TOBECHANGEDONNUMBER/$substituted mm/;      $output.='\vspace*{-6 mm}\begin{center}';
     }   } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
     $output .=  $Apache::londefdef::table[-1]{'rowdata'}[$in];      $output.=' \hfill \llap{'
     chop $output;   }
     $output .= ' \\\\ ';   $output.=$Apache::londefdef::table[-1]{'content'}[$in][$jn];
    if ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'c') {
       $output.='\end{center}\vspace*{-6 mm}';
    } elsif ($Apache::londefdef::table[-1]{'align'}[$in][$jn] eq 'r') {
       $output.='} ';
    }
                   if ($jn!=$#fwidth) {$output.=' '.$Apache::londefdef::table[-1]{'vinc'};}
       }
       $output.=' \\\\ '.$Apache::londefdef::table[-1]{'hinc'}.' ';
  }   }
  $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$output.$Apache::londefdef::table[-1]{'hinc'}.'\end{tabular}\vskip 0 mm ';   $Apache::londefdef::table[-1]{'output'} .= $header_of_table.$Apache::londefdef::table[-1]{'hinc'}.$output.'\end{tabular}\strut\newline\strut ';
  if ($#Apache::londefdef::table > 0) {       if ($#Apache::londefdef::table > 0) {    
     my $inmemory = $Apache::londefdef::table[-1]{'output'};      my $inmemory = $Apache::londefdef::table[-1]{'output'};
     pop @Apache::londefdef::table;      pop @Apache::londefdef::table;
Line 1772  sub end_table { Line 2104  sub end_table {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <tr> tag  #-- <tr> tag (end tag optional)
 sub start_tr {  sub start_tr {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 1780  sub start_tr { Line 2112  sub start_tr {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $Apache::londefdef::table[-1]{'row_number'}++;   $Apache::londefdef::table[-1]{'row_number'}++;
  my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);   my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
  if ($alignchar ne '') {   if ($alignchar ne '') {
     push @ {$Apache::londefdef::table[-1]{'rows'} }, $alignchar;      push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
  } else {   } else {
     push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';      push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
  }   }
  push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});   push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
  $Apache::londefdef::table[-1]{'counter_columns'} = -1;   $Apache::londefdef::table[-1]{'counter_columns'} = -1;
  $Apache::londefdef::table[-1]{'TeXlength'} = '';   push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
   $Apache::londefdef::table[-1]{'length'} = '';   push @ {$Apache::londefdef::table[-1]{'objectlen'}}, [];
    push @ {$Apache::londefdef::table[-1]{'minlen'}}, [];
    push @ {$Apache::londefdef::table[-1]{'maxlen'}}, [];
    push @ {$Apache::londefdef::table[-1]{'content'}}, [];
     }       } 
     return $currentstring;      return $currentstring;
 }  }
                   
 sub end_tr {  sub end_tr {
     my ($target,$token) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];        $currentstring = $token->[2];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  push @{ $Apache::londefdef::table[-1]{'TeXlengthrow'} },$Apache::londefdef::table[-1]{'TeXlength'};   if ($Apache::londefdef::TD_redirection) {
  push @{ $Apache::londefdef::table[-1]{'lengthrow'} },$Apache::londefdef::table[-1]{'length'};      &end_td_tex($parstack,$parser,$safeeval);    
    }
     }      }
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <td> tag  #-- <td> tag (end tag optional)
 sub start_td {  sub start_td {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $what_to_push = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);   $Apache::londefdef::TD_redirection = 1;
  if ($what_to_push eq '') {   &tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
     $what_to_push = substr($Apache::londefdef::table[-1]{'rows'}[0],0,1);;  
  }  
  push @{ $Apache::londefdef::table[-1]{'columns'} }, $what_to_push;  
  $Apache::londefdef::table[-1]{'counter_columns'}++;  
  &Apache::lonxml::startredirection();  
     }       } 
     return $currentstring;      return $currentstring;
 }     }   
            
   sub tag_check {
       my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
       my @ar=@$parstack; 
       for (my $i=$#ar-1;$i>=0;$i--) {
    if (lc($$tagstack[$i]) eq $good_tag) {
       &start_td_tex($parstack,$parser,$safeeval);
       last;
    } elsif (lc($$tagstack[$i]) eq $bad_tag) {
       splice @ar, $i+1;
       &end_td_tex(\@ar,$parser,$safeeval);
       &start_td_tex($parstack,$parser,$safeeval);
       last;
    }
       }
       return '';
   }
    
   sub start_td_tex {
       my ($parstack,$parser,$safeeval) = @_;
       my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
       if ($alignchar eq '') {
    $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
       }
       push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
       $Apache::londefdef::table[-1]{'counter_columns'}++;
       my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
       if (defined $TeXwidth) {
    my $current_length=&recalc($TeXwidth);
    $current_length=~/(\d+\.?\d*)/;
    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
       }
       &Apache::lonxml::startredirection();
       return '';
   }
   
   sub end_td_tex {
       my ($parstack,$parser,$safeeval) = @_;
       my $current_row = $Apache::londefdef::table[-1]{'row_number'};
       my $data=&Apache::lonxml::endredirection();
       my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
       if (defined $TeXwidth) {
    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
       } else {
    if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
       my $garbage_data=$data;
       my $fwidth=0;
               while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
    my $current_length=&recalc($1);
    $current_length=~/(\d+\.?\d*)/;
    if ($fwidth<$1) {$fwidth=$1;}
    $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
       }
               while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
    my $current_length=$1;
    if ($fwidth<$current_length) {$fwidth=$current_length;}
    $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
       }
       push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
       push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
       push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
       push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
    } elsif ($data=~/\\parbox\{\s*\d+\.?\d*\s*(mm|cm|in|pc|pt)*\s*\}/ or $data=~/\\epsfxsize\s*=\s*\d+\.?\d*\s*(mm|cm|in|pc|pt)*/) {
       my $garbage_data=$data;
       my $fwidth=0;
               while ($garbage_data=~/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)\s*\}/) {
    my $current_length=&recalc($1);
    $current_length=~/(\d+\.?\d*)/;
    if ($fwidth<$1) {$fwidth=$1;}
    $garbage_data=~s/\\parbox\{\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
       }
               while ($garbage_data=~/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
    my $current_length=&recalc($1);
    $current_length=~/(\d+\.?\d*)/;
    if ($fwidth<$1) {$fwidth=$1;}
    $garbage_data=~s/\\epsfxsize\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
       }
       push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
       push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
       push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
       push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
       $data=~s/\\\\\s*$//; 
    } else {  
       $data=~s/^\s+(\S.*)/$1/; 
       $data=~s/(.*\S)\s+$/$1/;
       $data=~s/(\s)+/$1/;
       my ($current_length,$min_length)=(0,0);
       if ($data=~/\\vskip/) {
                   my $newdata=$data;
    $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
    my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
    foreach my $elementdata (@newdata) {
       my $lengthnewdata=2.5*&LATEX_length($elementdata);
       if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
                       my @words=split(/ /,$elementdata);
       foreach my $word (@words) {
    my $lengthword=2.5*&LATEX_length($word);
    if ($min_length<$lengthword) {$min_length=$lengthword;}
       }
    }
       } else {
    $current_length=2.5*&LATEX_length($data);
                       my @words=split(/ /,$data);
       foreach my $word (@words) {
    my $lengthword=2*&LATEX_length($word);
    if ($min_length<$lengthword) {$min_length=$lengthword;}
       }
       }
       push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
       push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
       push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
       push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
    }        
       }
    for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {         
       $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
    }
       push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
       return'';
   }
   
 sub end_td {  sub end_td {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];        $currentstring = $token->[2];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $current_row = $Apache::londefdef::table[-1]{'row_number'};          $Apache::londefdef::TD_redirection =0;
  my $data=&Apache::lonxml::endredirection();   &end_td_tex($parstack,$parser,$safeeval);
  my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);  
  if (defined $TeXwidth) {  
     my $current_length=&recalc($TeXwidth);  
     $current_length=~/(\d+)/;  
     $Apache::londefdef::table[-1]{'TeXlength'} .= $1.',';  
     $Apache::londefdef::table[-1]{'length'} .= '0,';  
  } else {  
     if ($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {  
  my $current_length=&recalc($1);  
  $current_length=~/(\d+\.?\d*)/;  
  $Apache::londefdef::table[-1]{'TeXlength'} .= $1.',';  
  $Apache::londefdef::table[-1]{'length'} .= '0,';  
     } else {    
  $data=~s/^\s+(\S.*)/$1/;  
  $data=~s/(.*\S)\s+$/$1/;  
  my $current_length=2*length($data);  
  $Apache::londefdef::table[-1]{'length'} .= $current_length.',';  
  $Apache::londefdef::table[-1]{'TeXlength'} .= '0,';  
     }          
  }  
  for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {           
     $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;  
  }  
  @{ $Apache::londefdef::table[-1]{'rowdata'} }[$current_row] .= '\parbox{TOBECHANGEDONNUMBER}{'.$data.'} '.$Apache::londefdef::table[-1]{'vinc'};  
     }      }
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <th> tag  #-- <th> tag (end tag optional)
 sub start_th {  sub start_th {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $what_to_push = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);   $Apache::londefdef::TD_redirection = 1;
  if ($what_to_push eq '') {   &tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
     $what_to_push = substr($Apache::londefdef::table[-1]{'rows'}[0],0,1);;  
  }  
  push @{ $Apache::londefdef::table[-1]{'columns'} }, $what_to_push;  
  $Apache::londefdef::table[-1]{'counter_columns'}++;  
  &Apache::lonxml::startredirection();  
     }       } 
     return $currentstring;      return $currentstring;
 }     }   
            
   sub tagg_check {
       my ($good_tag,$bad_tag,$tagstack,$parstack,$parser,$safeeval) = @_;
       my @ar=@$parstack; 
       for (my $i=$#ar-1;$i>=0;$i--) {
    if (lc($$tagstack[$i]) eq $good_tag) {
       &start_th_tex($parstack,$parser,$safeeval);
       last;
    } elsif (lc($$tagstack[$i]) eq $bad_tag) {
       splice @ar, $i+1;
       &end_th_tex(\@ar,$parser,$safeeval);
       &start_th_tex($parstack,$parser,$safeeval);
       last;
    }
       }
       return '';
   }
    
   sub start_th_tex {
       my ($parstack,$parser,$safeeval) = @_;
       my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1),0,1);
       if ($alignchar eq '') {
    $alignchar = $Apache::londefdef::table[-1]{'rows'}[-1];
       }
       push @{ $Apache::londefdef::table[-1]{'align'}[$Apache::londefdef::table[-1]{'row_number'}] }, $alignchar;
       $Apache::londefdef::table[-1]{'counter_columns'}++;
       my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
       if (defined $TeXwidth) {
    my $current_length=&recalc($TeXwidth);
    $current_length=~/(\d+\.?\d*)/;
    push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$1;
       }
       &Apache::lonxml::startredirection();
       return '';
   }
   
   sub end_th_tex {
       my ($parstack,$parser,$safeeval) = @_;
       my $current_row = $Apache::londefdef::table[-1]{'row_number'};
       my $data=&Apache::lonxml::endredirection();
       my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
       if (defined $TeXwidth) {
    push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
    push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
    push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
       } else {
    if (($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) or ($data=~m/\[(\d+\.?\d*)\s*mm\]/)) {
       my $garbage_data=$data;
       my $fwidth=0;
               while ($garbage_data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {
    my $current_length=&recalc($1);
    $current_length=~/(\d+\.?\d*)/;
    if ($fwidth<$1) {$fwidth=$1;}
    $garbage_data=~s/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)//;
       }
               while ($garbage_data=~m/\[(\d+\.?\d*)\s*mm\]/) {
    my $current_length=$1;
    if ($fwidth<$current_length) {$fwidth=$current_length;}
    $garbage_data=~s/\[(\d+\.?\d*)\s*mm\]//;
       }
       push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
       push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$fwidth;
       push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
       push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
    } else {  
       $data=~s/^\s+(\S.*)/$1/; 
       $data=~s/(.*\S)\s+$/$1/;
       $data=~s/(\s)+/$1/;
       my ($current_length,$min_length)=(0,0);
       if ($data=~/\\vskip/) {
                   my $newdata=$data;
    $newdata=~s/\\vskip \d*\.?\d*\s*mm/THISISJUSTTEMPORARYSEPARATOR/g;
    my @newdata=split(/THISISJUSTTEMPORARYSEPARATOR/,$newdata);
    foreach my $elementdata (@newdata) {
       my $lengthnewdata=2.5*&LATEX_length($elementdata);
       if ($lengthnewdata>$current_length) {$current_length=$lengthnewdata;}
                       my @words=split(/ /,$elementdata);
       foreach my $word (@words) {
    my $lengthword=2.5*&LATEX_length($word);
    if ($min_length<$lengthword) {$min_length=$lengthword;}
       }
    }
       } else {
    $current_length=2.5*&LATEX_length($data);
                       my @words=split(/ /,$data);
       foreach my $word (@words) {
    my $lengthword=2*&LATEX_length($word);
    if ($min_length<$lengthword) {$min_length=$lengthword;}
       }
       }
       push @ {$Apache::londefdef::table[-1]{'TeXlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
       push @ {$Apache::londefdef::table[-1]{'objectlen'}[$Apache::londefdef::table[-1]{'row_number'}] },'0';
       push @ {$Apache::londefdef::table[-1]{'maxlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$current_length;
       push @ {$Apache::londefdef::table[-1]{'minlen'}[$Apache::londefdef::table[-1]{'row_number'}] },$min_length;
    }        
       }
    for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {         
       $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
    }
       #make data bold
       $data='\textbf{'.$data.'}';
       push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
       return'';
   }
   
 sub end_th {  sub end_th {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];        $currentstring = $token->[2];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  my $current_row = $Apache::londefdef::table[-1]{'row_number'};          $Apache::londefdef::TD_redirection =0;
  my $data=&Apache::lonxml::endredirection();   &end_th_tex($parstack,$parser,$safeeval);
  my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);  
  if (defined $TeXwidth) {  
     my $current_length=&recalc($TeXwidth);  
     $current_length=~/(\d+)/;  
     $Apache::londefdef::table[-1]{'TeXlength'} .= $1.',';  
     $Apache::londefdef::table[-1]{'length'} .= '0,';  
  } else {  
     if ($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt)*)/) {  
  my $current_length=&recalc($1);  
  $current_length=~/(\d+)/;  
  $Apache::londefdef::table[-1]{'TeXlength'} .= $1.',';  
  $Apache::londefdef::table[-1]{'length'} .= '0,';  
     } else {       
  $data=~/^\s*(\S.*)/;  
  $data=$1;  
  $data=~/(.*\S)\s*$/;  
  $data=$1;  
  my $current_length=2*length($data);  
  $Apache::londefdef::table[-1]{'length'} .= $current_length.',';  
  $Apache::londefdef::table[-1]{'TeXlength'} .= '0,';  
     }          
  }  
  for (my $in=0; $in<=$#{$Apache::londefdef::table[-1]{'include'}};$in++) {                                  
     $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;  
  }  
  $data='\textbf{'.$data.'}';  
  @{ $Apache::londefdef::table[-1]{'rowdata'} }[$current_row] .= '\parbox{TOBECHANGEDONNUMBER}{'.$data.'} '.$Apache::londefdef::table[-1]{'vinc'};  
     }      }
     return $currentstring;      return $currentstring;
 }  }
 #-- <img> tag       
   #-- <img> tag (end tag forbidden)
   #
   #  Render the <IMG> tag.
   #     <IMG> has the following attributes (in addition to the 
   #     standard HTML ones:
   #      TeXwrap   - Governs how the tex target will try to wrap text around
   #                  horizontally aligned images.
   #      TeXwidth  - The width of the image when rendered for print (mm).
   #      TeXheight - The height of the image when rendered for print (mm)
   #         (Note there seems to also be support for this as a % of page size)
   #      
 sub start_img {  sub start_img {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,      my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
  undef,1);   undef,1);
       if (not $src and ($target eq 'web' or $target eq 'tex')) { 
    my $inside = &Apache::lonxml::get_all_text("/img",$parser);
    return '';
       }
     $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$src;      $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=$src;
     my $currentstring = '';      my $currentstring = '';
     my $width_param = '';  
     my $height_param = '';  
     my $scaling = .3;      my $scaling = .3;
       
      # Render unto browsers that which are the browser's...
   
     if ($target eq 'web') {      if ($target eq 'web') {
  if ($ENV{'browser.imagesuppress'} ne 'on') {   if ($ENV{'browser.imagesuppress'} ne 'on') {
     $currentstring = $token->[4];      $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
  } else {   } else {
     my $alttag= &Apache::lonxml::get_param      my $alttag= &Apache::lonxml::get_param
  ('alt',$parstack,$safeeval,undef,1);   ('alt',$parstack,$safeeval,undef,1);
Line 1937  sub start_img { Line 2453  sub start_img {
  $alttag=&Apache::lonmeta::alttag   $alttag=&Apache::lonmeta::alttag
     ($Apache::lonxml::pwd[-1],$src);      ($Apache::lonxml::pwd[-1],$src);
     }      }
     $currentstring='[IMAGE: '.$alttag.']';      $currentstring.='[IMAGE: '.$alttag.']';
  }   }
   
    # and render unto TeX that which is LaTeX
   
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);   #
  &image_replication($src);   #  The alignment will require some superstructure to be put around
    #  the \includegraphics stuff.  At present we can only partially
    #  simulate the alignments offered by html.
    #
    #
    my $align = lc(&Apache::lonxml::get_param('align', 
     $parstack,
     $safeeval,
     undef,1));
    if(!$align) {
       $align = "bottom"; # This is html's default so it's ours too.
    }
    #
    &Apache::lonxml::debug("Alignemnt = $align");
    #  LaTeX's image/text wrapping is really bad since it wants to
    #  make figures float.  
           #   The user has the optional parameter (applicable only to l/r
    # alignment to use the picins/parpic directive to get wrapped text
    # this is also imperfect.. that's why we give them a choice...
    # so they can't yell at us for our choice.
    #
    my $latex_rendering = &Apache::lonxml::get_param('TeXwrap',
       $parstack,
       $safeeval,
       undef,0);
    &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
    if(!$latex_rendering) {
       $latex_rendering = "parbox";
    }
    &Apache::lonxml::debug("LaTeX rendering = $latex_rendering");
   
  #if original gif/jpg/png file exist do following:   #if original gif/jpg/png file exist do following:
  if (-e $src) {             my ($path,$file) = &get_eps_image($src);
     #defines the default size of image   $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
     my $image = Image::Magick->new;   if (-e $src) {
     my $current_figure = $image->Read($src);      my ($height_param,$width_param)=
     $width_param = $image->Get('width') * $scaling;;   &image_size($src,0.3,$parstack,$safeeval);
     $height_param = $image->Get('height') * $scaling;;      $currentstring .= '\graphicspath{{'.$path.'}}'
     undef $image;   .'\includegraphics[width='.$width_param.' mm,height='.$height_param.'mm]{'.$file.'} ';
     #do we have any specified size of the picture?  
     my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval);      #    If there's an alignment specification we need to honor it here.
     my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval);      #    For the horizontal alignments, we will also honor the
     my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,      #    value of the latex specfication.  The default is parbox,
    undef,1);      #    and that's used for illegal values too.  
     if ($TeXwidth ne '') {        #    
  if ($TeXwidth=~/(\d+)\s*\%/) {      #    Even though we set a default alignment value, the user
     $width_param = $1*$ENV{'form.textwidth'}/100;      #    could have given us an illegal value.  In that case we
  } else {       #    just use the default alignment of bottom..
     $width_param = $TeXwidth;      if      ($align eq "top")    {
  }   $currentstring = '\raisebox{-'.$height_param.'mm}{'.$currentstring.'}';
     } elsif ($TeXheight ne '') {      } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
  $width_param = $TeXheight/$height_param*$width_param;   my $offset = $height_param/2;
     } elsif ($width ne '') {   $currentstring = '\raisebox{-'.$offset.'mm}{'.$currentstring.'}';
  $width_param = $width*$scaling;            } elsif ($align eq "left")   { 
     }   if ($latex_rendering eq "parpic") { 
     my $file;      $currentstring = '\parpic[l]{'.$currentstring.'}';
     my $path;   } else {                                     # parbox rendering
     if ($src =~ m!(.*)/([^/]*)$!) {      $currentstring = "\\strut\\newline\n".
  $file = $2;    '\parbox{'.$width_param.'mm}{'.$currentstring.'}';
  $path = $1.'/';   
     }   
     my $newsrc = $src;  
     $newsrc =~ s/\.(gif|jpg|png)$/.eps/i;  
     $file=~s/\.(gif|jpg|png)$/.eps/i;  
     #where can we find the picture?  
     if (-e $newsrc) {  
  #eps counterpart for image exist   
  if ($path) {  
     $currentstring .= '\vskip 1 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';  
  }   }
     } else {      } elsif ($align eq "right")  {   
  #there is no eps counterpart for image - check for ps one   if ($latex_rendering eq "parpic") {
  $newsrc =~ s/\.eps$/\.ps/;      $currentstring = '\parpic[r]{'.$currentstring.'}';
  if (-e $newsrc) {   } else {                                 # parbox rendering. 
     #ps counterpart for image exist       $currentstring = '\parbox{'.$width_param.'mm}{\begin{flushright}'
     $file =~ s/\.eps$/\.ps/;               .$currentstring.'\end{flushright}} \newline'."\n";
     if ($path) {  
  $currentstring .= '\vskip 1 mm \noindent\graphicspath{{'.$path.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';  
     }  
  } else {  
     #there aren't eps or ps - so create eps   
     my $temp_file;  
     my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";  
     $temp_file = Apache::File->new('>>'.$filename);   
     print $temp_file "$src\n";  
     $currentstring .= '\vskip 1 mm \graphicspath{{/home/httpd/prtspool/}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';  
  }   }
       } else { # Bottom is also default.
    # $currentstring = '\raisebox{'.$height_param.'mm}{'.$currentstring.'}';
     }      }
  } else {   } else {
     #original image file doesn't exist so check the alt attribute      #original image file doesn't exist so check the alt attribute
Line 2008  sub start_img { Line 2538  sub start_img {
  $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);   $alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
     }      }
   
     if ($alt) {      if ($alt) { $currentstring .= ' '.$alt.' '; }
  $currentstring .= ' '.$alt.' ';   }
     } else {  
  #<allow> tag will care about replication    # And here's where the semi-quote breaks down: allow the user
           # to edit the beast as well by rendering the problem for edit:
       } elsif ($target eq 'edit') {
    $currentstring .=&Apache::edit::tag_start($target,$token);
    $currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
       &Apache::edit::browse('src',undef,'alt').' '.
       &Apache::edit::search('src',undef,'alt').'<br />';
    $currentstring .=&Apache::edit::text_arg('Description:','alt',$token,70).'<br />';
    $currentstring .=&Apache::edit::text_arg('width (pixel):','width',$token,5);
    $currentstring .=&Apache::edit::text_arg('height (pixel):','height',$token,5).'<br />';
    $currentstring .=&Apache::edit::text_arg('TeXwidth (mm):','TeXwidth',$token,5);
    $currentstring .=&Apache::edit::text_arg('TeXheight (mm):','TeXheight',$token,5);
    $currentstring .=&Apache::edit::select_arg('Alignment:','align',
      ['','bottom','middle','top','left','right'],$token,5);
    $currentstring .=&Apache::edit::select_arg('TeXwrap:', 'TeXwrap',
      ['', 'parbox', 'parpic'], $token, 2);
    $currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
    my $src=    &Apache::lonxml::get_param('src',$parstack,$safeeval);
    my $alt=    &Apache::lonxml::get_param('alt',$parstack,$safeeval);
    my $width=  &Apache::lonxml::get_param('width',$parstack,$safeeval);
    my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
   
   
    $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
    if ($width) { $currentstring.=' width="'.$width.'" '; }
    if ($height) { $currentstring.=' height="'.$height.'" '; }
    $currentstring .= ' />';
       } elsif ($target eq 'modified') {
    my ($osrc,$owidth,$oheight)=
       ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
    my $ctag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'src','alt','align',
        'TeXwidth','TeXheight', 'TeXwrap',
        'width','height');
    my ($nsrc,$nwidth,$nheight)=
       ($token->[2]{'src'},$token->[2]{'width'},$token->[2]{'height'});
    my $loc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$nsrc);
    &image_replication($loc);
    my ($iwidth,$iheight);
    if (-e $loc) {
       my $image = Image::Magick->new;
       $image->Read($loc);
       ($iwidth, $iheight) = ($image->Get('width'),
      $image->Get('height'));
    }
    if ($osrc ne $nsrc || (!$nwidth && !$nheight)) {
       # changed image or no size specified,
               # if they didn't explicitly change the 
               # width or height use the ones from the image
       if ($iwidth && $iheight) {
    if ($owidth == $nwidth || (!$nwidth && !$nheight)) {
       $token->[2]{'width'} = $iwidth;$ctag=1;
    }
    if ($oheight == $nheight || (!$nwidth && !$nheight)) {
       $token->[2]{'height'}=$iheight;$ctag=1;
    }
     }      }
  }   }
    my ($cwidth,$cheight)=($token->[2]{'width'},$token->[2]{'height'});
    # if we don't have a width or height
    if ($iwidth && $cwidth && !$cheight) {
       $token->[2]{'height'}=int(($cwidth/$iwidth)*$iheight);$ctag=1;
    }
    if ($iheight && $cheight && !$cwidth) {
       $token->[2]{'width'}=int(($cheight/$iheight)*$iwidth);$ctag=1;
    }
    if ($ctag) {$currentstring=&Apache::edit::rebuild_tag($token);}
     }      }
     return $currentstring;      return $currentstring;
 }  }
Line 2029  sub end_img { Line 2623  sub end_img {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <applet> tag  #-- <applet> tag (end tag required)
 sub start_applet {  sub start_applet {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
           
Line 2043  sub start_applet { Line 2637  sub start_applet {
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  if ($ENV{'browser.appletsuppress'} ne 'on') {   if ($ENV{'browser.appletsuppress'} ne 'on') {
     $currentstring = $token->[4];      $currentstring = &Apache::lonenc::encrypt_ref($token,
     {'code'=>$code,
      'archive'=>$archive}
     );
  } else {   } else {
     my $alttag= &Apache::lonxml::get_param('alt',$parstack,      my $alttag= &Apache::lonxml::get_param('alt',$parstack,
    $safeeval,undef,1);     $safeeval,undef,1);
Line 2054  sub start_applet { Line 2651  sub start_applet {
     $currentstring='[APPLET: '.$alttag.']';      $currentstring='[APPLET: '.$alttag.']';
  }   }
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = " \\begin{figure} ";   my $alttag= &Apache::lonxml::get_param('alt',$parstack,
          $safeeval,undef,1);
    unless ($alttag) {
       my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,
    undef,1);
       $alttag=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],
        $code);
    }
    $currentstring.='\begin{center} \fbox{Java Applet: '.$alttag.
       '.}\end{center}';
     }       } 
     return $currentstring;      return $currentstring;
 }  }
Line 2065  sub end_applet { Line 2671  sub end_applet {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];   $currentstring = $token->[2];
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = " \\end{figure}";  
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <embed> tag  #-- <embed> tag (end tag optional/required)
 sub start_embed {      sub start_embed {    
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);      my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
Line 2078  sub start_embed { Line 2683  sub start_embed {
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  if ($ENV{'browser.embedsuppress'} ne 'on') {   if ($ENV{'browser.embedsuppress'} ne 'on') {
     $currentstring = $token->[4];      $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
  } else {   } else {
     my $alttag=&Apache::lonxml::get_param      my $alttag=&Apache::lonxml::get_param
  ('alt',$parstack,$safeeval,undef,1);   ('alt',$parstack,$safeeval,undef,1);
Line 2088  sub start_embed { Line 2693  sub start_embed {
     $currentstring='[EMBED: '.$alttag.']';      $currentstring='[EMBED: '.$alttag.']';
  }   }
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = " \\begin{figure} ";    
     }       } 
     return $currentstring;      return $currentstring;
 }  }
Line 2098  sub end_embed { Line 2702  sub end_embed {
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];        $currentstring = $token->[2];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {  
  $currentstring = " \\end{figure}";    
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <param> tag  #-- <param> tag (end tag forbidden)
 sub start_param {  sub start_param {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     if (&Apache::lonxml::get_param      if (&Apache::lonxml::get_param
Line 2116  sub start_param { Line 2719  sub start_param {
  &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);   &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        my %toconvert;
    my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
    if ($src) { $toconvert{'src'}= $src; }
    my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval,
       undef,1);
    if ($name=~/^cabbase$/i) {
       $toconvert{'value'}=&Apache::lonxml::get_param('value',$parstack,
      $safeeval,undef,1);
    }
    $currentstring = &Apache::lonenc::encrypt_ref($token,\%toconvert);
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = " \\begin{figure} ";    
     }       } 
     return $currentstring;      return $currentstring;
 }  }
Line 2129  sub end_param { Line 2740  sub end_param {
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];        $currentstring = $token->[2];     
     } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
  $currentstring = " \\end{figure}";    
     }       } 
     return $currentstring;      return $currentstring;
 }  }
Line 2141  sub start_allow { Line 2751  sub start_allow {
     $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);      $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
     $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=      $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
  &Apache::lonnet::clutter($src);   &Apache::lonnet::clutter($src);
     &image_replication($src);      if ($target eq 'tex') { &image_replication($src); }
     my $result;      my $result;
     if ($target eq 'edit') {      if ($target eq 'edit') {
  $result .=&Apache::edit::tag_start($target,$token);   $result .=&Apache::edit::tag_start($target,$token);
Line 2161  sub end_allow { Line 2771  sub end_allow {
     return '';      return '';
 }  }
   
 #-- Frames  #-- Frames (end tag required)
   #-- <frameset>
 sub start_frameset {  sub start_frameset {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {       if ($target eq 'web') { 
  if (!$Apache::lonxml::registered) {   if (!$Apache::lonxml::registered &&
       $ENV{'request.state'} eq 'published') {
     $currentstring.='<head>'.      $currentstring.='<head>'.
  &Apache::lonmenu::registerurl(undef,$target).'</head>';   &Apache::lonmenu::registerurl(undef,$target).'</head>';
  }   }
Line 2206  sub end_frameset { Line 2818  sub end_frameset {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <pre>  #-- <xmp> (end tag required)
   sub start_xmp {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
       my $currentstring = '';
       if ($target eq 'web') {
    $currentstring .= $token->[4];
       } elsif ($target eq 'tex') {
    $currentstring .= '\begin{verbatim}';
       } 
       return $currentstring;
   }
   
   sub end_xmp {
       my ($target,$token) = @_;
       my $currentstring = '';
       if ($target eq 'web') {
    $currentstring .= $token->[2];
       } elsif ($target eq 'tex') {
    $currentstring .= '\end{verbatim}';
       }
       return $currentstring;
   }
   
   #-- <pre> (end tag required)
 sub start_pre {  sub start_pre {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2289  sub end_blankspace { Line 2924  sub end_blankspace {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <abbr> tag  #-- <abbr> tag (end tag required)
 sub start_abbr {  sub start_abbr {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2308  sub end_abbr { Line 2943  sub end_abbr {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <acronym> tag  #-- <acronym> tag (end tag required)
 sub start_acronym {  sub start_acronym {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2327  sub end_acronym { Line 2962  sub end_acronym {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <area> tag  #-- <area> tag (end tag forbidden)
 sub start_area {  sub start_area {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2346  sub end_area { Line 2981  sub end_area {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <base> tag  #-- <base> tag (end tag forbidden)
 sub start_base {  sub start_base {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     }       }
     return $currentstring;      return $currentstring;
 }  }
   
Line 2365  sub end_base { Line 3000  sub end_base {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <bdo> tag  #-- <bdo> tag (end tag required)
 sub start_bdo {  sub start_bdo {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2384  sub end_bdo { Line 3019  sub end_bdo {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <bgsound> tag  #-- <bgsound> tag (end tag optional)
 sub start_bgsound {  sub start_bgsound {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2403  sub end_bgsound { Line 3038  sub end_bgsound {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <blink> tag  #-- <blink> tag (end tag required)
 sub start_blink {  sub start_blink {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2422  sub end_blink { Line 3057  sub end_blink {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <blockquote> tag  #-- <blockquote> tag (end tag required)
 sub start_blockquote {  sub start_blockquote {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2441  sub end_blockquote { Line 3076  sub end_blockquote {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <button> tag  #-- <button> tag (end tag required)
 sub start_button {  sub start_button {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2460  sub end_button { Line 3095  sub end_button {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <caption> tag  #-- <caption> tag (end tag required)
 sub start_caption {  sub start_caption {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2479  sub end_caption { Line 3114  sub end_caption {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <col> tag  #-- <col> tag (end tag forbdden)
 sub start_col {  sub start_col {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2498  sub end_col { Line 3133  sub end_col {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <colgroup> tag  #-- <colgroup> tag (end tag optional)
 sub start_colgroup {  sub start_colgroup {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2517  sub end_colgroup { Line 3152  sub end_colgroup {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <del> tag  #-- <del> tag (end tag required)
 sub start_del {  sub start_del {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2536  sub end_del { Line 3171  sub end_del {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <fieldset> tag  #-- <fieldset> tag (end tag required)
 sub start_fieldset {  sub start_fieldset {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2555  sub end_fieldset { Line 3190  sub end_fieldset {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <frame> tag  #-- <frame> tag (end tag forbidden)
 sub start_frame {  sub start_frame {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2574  sub end_frame { Line 3209  sub end_frame {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <iframe> tag  #-- <iframe> tag (end tag required)
 sub start_iframe {  sub start_iframe {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2593  sub end_iframe { Line 3228  sub end_iframe {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <ins> tag  #-- <ins> tag (end tag required)
 sub start_ins {  sub start_ins {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2612  sub end_ins { Line 3247  sub end_ins {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <isindex> tag  #-- <isindex> tag (end tag forbidden)
 sub start_isindex {  sub start_isindex {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2631  sub end_isindex { Line 3266  sub end_isindex {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <keygen> tag  #-- <keygen> tag (end tag forbidden)
 sub start_keygen {  sub start_keygen {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2669  sub end_label { Line 3304  sub end_label {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <layer> tag  #-- <layer> tag (end tag required)
 sub start_layer {  sub start_layer {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2688  sub end_layer { Line 3323  sub end_layer {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <legend> tag  #-- <legend> tag (end tag required)
 sub start_legend {  sub start_legend {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2707  sub end_legend { Line 3342  sub end_legend {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <link> tag  #-- <link> tag (end tag forbidden)
 sub start_link {  sub start_link {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2726  sub end_link { Line 3361  sub end_link {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <marquee> tag  #-- <marquee> tag (end tag optional)
 sub start_marquee {  sub start_marquee {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2745  sub end_marquee { Line 3380  sub end_marquee {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <malticol> tag  #-- <multicol> tag (end tag required)
 sub start_malticol {  sub start_multicol {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
Line 2755  sub start_malticol { Line 3390  sub start_malticol {
     return $currentstring;      return $currentstring;
 }  }
   
 sub end_malticol {  sub end_multicol {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
Line 2764  sub end_malticol { Line 3399  sub end_malticol {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <nobr> tag  #-- <nobr> tag (end tag required)
 sub start_nobr {  sub start_nobr {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     }       }  elsif ($target eq 'tex') {
    $currentstring='\mbox{';
       }
     return $currentstring;      return $currentstring;
 }  }
   
Line 2779  sub end_nobr { Line 3416  sub end_nobr {
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];       $currentstring = $token->[2];    
     }       }   elsif ($target eq 'tex') {
    $currentstring='}';
       }
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <noembed> tag  #-- <noembed> tag (end tag required)
 sub start_noembed {  sub start_noembed {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2802  sub end_noembed { Line 3441  sub end_noembed {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <noframes> tag  #-- <noframes> tag (end tag required)
 sub start_noframes {  sub start_noframes {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2821  sub end_noframes { Line 3460  sub end_noframes {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <nolayer> tag  #-- <nolayer> tag (end tag required)
 sub start_nolayer {  sub start_nolayer {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2840  sub end_nolayer { Line 3479  sub end_nolayer {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <noscript> tag  #-- <noscript> tag (end tag required)
 sub start_noscript {  sub start_noscript {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2859  sub end_noscript { Line 3498  sub end_noscript {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <object> tag  #-- <object> tag (end tag required)
 sub start_object {  sub start_object {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2878  sub end_object { Line 3517  sub end_object {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <optgroup> tag  #-- <optgroup> tag (end tag required)
 sub start_optgroup {  sub start_optgroup {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2897  sub end_optgroup { Line 3536  sub end_optgroup {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <samp> tag  #-- <samp> tag (end tag required)
 sub start_samp {  sub start_samp {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     }       } elsif ($target eq 'tex') {
    $currentstring='\texttt{';
       }
     return $currentstring;      return $currentstring;
 }  }
   
Line 2912  sub end_samp { Line 3553  sub end_samp {
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];       $currentstring = $token->[2];    
     }       } elsif ($target eq 'tex') {
    $currentstring='}';
       }
     return $currentstring;      return $currentstring;
 }  }
   
Line 2935  sub end_server { Line 3578  sub end_server {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <spacer> tag  #-- <spacer> tag (end tag forbidden)
 sub start_spacer {  sub start_spacer {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2954  sub end_spacer { Line 3597  sub end_spacer {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <span> tag  #-- <span> tag (end tag required)
 sub start_span {  sub start_span {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2973  sub end_span { Line 3616  sub end_span {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <tbody> tag  #-- <tbody> tag (end tag optional)
 sub start_tbody {  sub start_tbody {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 2992  sub end_tbody { Line 3635  sub end_tbody {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <tfoot> tag  #-- <tfoot> tag (end tag optional)
 sub start_tfoot {  sub start_tfoot {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 3011  sub end_tfoot { Line 3654  sub end_tfoot {
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <thead> tag  #-- <thead> tag (end tag optional)
 sub start_thead {  sub start_thead {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 3036  sub start_var { Line 3679  sub start_var {
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[4];        $currentstring = $token->[4];     
     }       } elsif ($target eq 'tex') {
    $currentstring = '\textit{'; 
       }
     return $currentstring;      return $currentstring;
 }  }
   
Line 3044  sub end_var { Line 3689  sub end_var {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
     if ($target eq 'web') {      if ($target eq 'web') {
  $currentstring = $token->[2];       $currentstring = $token->[2];
       } elsif ($target eq 'tex') {
    $currentstring = '}'; 
     }       } 
     return $currentstring;      return $currentstring;
 }  }
   
 #-- <wbr> tag  #-- <wbr> tag (end tag forbidden)
 sub start_wbr {  sub start_wbr {
     my ($target,$token) = @_;      my ($target,$token) = @_;
     my $currentstring = '';      my $currentstring = '';
Line 3068  sub end_wbr { Line 3715  sub end_wbr {
     return $currentstring;      return $currentstring;
 }  }
   
   
 #-- <hideweboutput> tag  #-- <hideweboutput> tag
 sub start_hideweboutput {  sub start_hideweboutput {
     my ($target,$token) = @_;      my ($target,$token) = @_;
Line 3090  sub end_hideweboutput { Line 3736  sub end_hideweboutput {
   
 sub image_replication {  sub image_replication {
     my $src = shift;      my $src = shift;
     if (not -e $src) {      if (not -e $src) { &Apache::lonnet::repcopy($src); }
  #replicates image itself      #replicates eps or ps 
  &Apache::lonnet::repcopy($src);      my $epssrc = my $pssrc = $src;
  #replicates eps or ps       $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
  my $newsrc = $src;      $pssrc  =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
  $newsrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;      if (not -e $epssrc && not -e $pssrc) {
  if (not -e $newsrc) {   my $result=&Apache::lonnet::repcopy($epssrc);
     if (&Apache::lonnet::repcopy($newsrc) ne 'OK') {   if ($result ne OK) { &Apache::lonnet::repcopy($pssrc); }
  $newsrc =~ s/\.eps$/\.ps/;      }
  &Apache::lonnet::repcopy($newsrc);      return '';
   }
   
   sub image_size {
       my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
       #size of image from gif/jpg/jpeg/png 
       $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
       my $image = Image::Magick->new;
       my $current_figure = $image->Read($src);
       my $width_param = $image->Get('width') * $scaling;;
       my $height_param = $image->Get('height') * $scaling;;
       undef($image);
       #do we have any specified LaTeX size of the picture?
       my $toget='TeXwidth'; if ($cis) { $toget=lc($toget); }
       my $TeXwidth = &Apache::lonxml::get_param($toget,$parstack,
         $safeeval,$depth,$cis);
       $toget='TeXheight'; if ($cis) { $toget=lc($toget); }
       my $TeXheight = &Apache::lonxml::get_param($toget,$parstack,
          $safeeval,$depth,$cis);
       #do we have any specified web size of the picture?
       my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval,
      $depth,1);
       if ($TeXwidth) { 
    my $old_width_param=$width_param;
    if ($TeXwidth=~/(\d+)\s*\%/) {
       $width_param = $1*$ENV{'form.textwidth'}/100;
    } else { 
       $width_param = $TeXwidth;
    }
    $height_param=$TeXwidth/$old_width_param*$height_param;
       } elsif ($TeXheight) {
    $height_param = $TeXheight;
    $width_param  = $TeXheight/$height_param*$width_param;
       } elsif ($width) {
    my $old_width_param=$width_param;
    $width_param = $width*$scaling;
           $height_param=$width_param/$old_width_param*$height_param;
       }
       if ($width_param > $ENV{'form.textwidth'}) {
           my $old_width_param=$width_param;
    $width_param =0.95*$ENV{'form.textwidth'};
           $height_param=$width_param/$old_width_param*$height_param;
       }
       return ($height_param, $width_param);
   }
   
   sub image_width {
       my ($height, $width) = &image_size(@_);
       return $width;
   }
   #  Not yet 100% sure this is correct in all circumstances..
   #  due to my uncertainty about mods to image_size.
   #
   sub image_height {
       my ($height, $width) = &image_size(@_);
       return $height;
   }
   
   sub get_eps_image {
       my ($src)=@_;
       my $orig_src=$src;
       $src=~s/\.(gif|png|jpg|jpeg)$/\.eps/i;
       $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
       if (! -e $src) {
    if (&Apache::lonnet::repcopy($src) ne OK ) {
       #if replication failed try to find ps file
       $src=~s/\.eps$/\.ps/;
       #if no ps file try to replicate it
       if (not -e $src &&
    &Apache::lonnet::repcopy($src) ne OK) {
    #if replication failed try to produce eps file dynamically
    $src=~s/\.ps$/\.eps/;
    my $temp_file;
    open(FILE,">>/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat");
    my $newsrc=$orig_src;
    $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
    print FILE "$newsrc\n";
    $src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
    $src=~s|/home/([^/]*)/public_html/|/home/httpd/prtspool/$1/|;
     }      }
  }   }
     }      }
     return '';      my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
       return ($path.'/',$file);
   }
   
   sub eps_generation {
       my ($src,$file,$width_param) = @_;     
       my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.dat";
       my $temp_file = Apache::File->new('>>'.$filename); 
       print $temp_file "$src\n";
       my $newsrc = $src;
       $newsrc =~ s/(\.gif|\.jpg|\.jpeg)$/\.eps/i;
       $newsrc=~s/\/home\/httpd\/html\/res//;
       $newsrc=~s/\/home\/([^\/]*)\/public_html\//\/$1\//;
       $newsrc=~s/\/\.\//\//;
       $newsrc=~s/\/([^\/]+)\.(ps|eps)/\//;
       if ($newsrc=~/\/home\/httpd\/lonUsers\//) {
    $newsrc=~s/\/home\/httpd\/lonUsers//;
    $newsrc=~s/\/([^\/]+)\/(\w)\/(\w)\/(\w)\//\/$1\//;
       }
       if ($newsrc=~/\/userfiles\//) {
    return ' \graphicspath{{'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
       } else {
    return ' \graphicspath{{/home/httpd/prtspool'.$newsrc.'}}\includegraphics[width='.$width_param.' mm]{'.$file.'} ';
       }
   }
   
   sub file_path {     
       my $src=shift;
       my ($file,$path); 
       if ($src =~ m!(.*)/([^/]*)$!) {
    $file = $2; 
    $path = $1.'/'; 
       } 
       return $file,$path;
 }  }
   
 sub recalc {  sub recalc {
Line 3124  sub recalc { Line 3881  sub recalc {
     return $value.' mm';      return $value.' mm';
 }  }
   
   sub LATEX_length {
       my $garbage=shift;
       $garbage=~s/^\s+$//;
       $garbage=~s/^\s+(\S.*)/$1/;#space before 
       $garbage=~s/(.*\S)\s+$/$1/;#space after 
       $garbage=~s/(\s)+/$1/;#only one space
       $garbage=~s/(\\begin{([^\}]+)}|\\end{([^\}]+)})//g;#remove LaTeX \begin{...} and \end{...}
       $garbage=~s/(\$\_\{|\$\_|\$\^{|\$\^|\}\$)//g;#remove $_{,$_,$^{,$^,}$
       $garbage=~s/([^\\])\$/$1/g;#$
       $garbage=~s/(\\ensuremath\{\_\{|\\ensuremath\{\_|\\ensuremath\{\^{|\\ensuremath\{\^|\})//g;#remove \ensuremath{...}
      $garbage=~s/(\\alpha|\\beta|\\gamma|\\delta|\\epsilon|\\verepsilon|\\zeta|\\eta|\\theta|\\vartheta|\\iota|\\kappa|\\lambda|\\mu|\\nu|\\xi|\\pi|\\varpi|\\rho|\\varrho|\\sigma|\\varsigma|\\tau|\\upsilon|\\phi|\\varphi|\\chi|\\psi|\\omega|\\Gamma|\\Delta|\\Theta|\\Lambda|\\Xi|\\Pi|\\Sigma|\\Upsilon|\\Phi|\\Psi|\\Omega)/1/g;
       $garbage=~s/(\\pm|\\mp|\\times|\\div|\\cdot|\\ast|\\star|\\dagger|\\ddagger|\\amalg|\\cap|\\cup|\\uplus|\\sqcap|\\sqcup|\\vee|\\wedge|\\oplus|\\ominus|\\otimes|\\circ|\\bullet|\\diamond|\\lhd|\\rhd|\\unlhd|\\unrhd|\\oslash|\\odot|\\bigcirc|\\Box|\\Diamond|\\bigtriangleup|\\bigtriangledown|\\triangleleft|\\triangleright|\\setminus|\\wr)/1/g;
       $garbage=~s/(\\le|\\ll|\\leq|\\ge|\\geq|\\gg|\\neq|\\doreq|\\sim|\\simeq|\\subset|\\subseteq|\\sqsubset|\\sqsubseteq|\\in|\\vdash|\\models|\\supset|\\supseteq|\\sqsupset|\\sqsupseteq|\\ni|\\dash|\\perp|\\approx|\\cong|\\equiv|\\propto|\\prec|\\preceq|\\parallel|\\asymp|\\smile|\\frown|\\bowtie|\\succ|\\succeq|\\mid)/1/g;
       $garbage=~s/(\\not<|\\\\not\\le|\\not\\prec|\\not\\preceq|\\not\\subset|\\not\\subseteq|\\not\\sqsubseteq|\\not\\in|\\not>|\\not\\ge|\\not\\succ|\\notsucceq|\\not\\supset|\\notsupseteq|\\not\\sqsupseteq|\\notin|\\not=|\\not\\equiv|\\not\\sim|\\not\\simeq|\\not\\approx|\\not\\cong|\\not\\asymp)/1/g;
       $garbage=~s/(\\leftarrow|\\gets|\\Leftarrow|\\rightarrow|\\to|\\Rightarrow|\\leftrightarrow|\\Leftrightarrow|\\mapsto|\\hookleftarrow|\\leftharpoonup|\\leftkarpoondown|\\rightleftharpoons|\\longleftarrow|\\Longleftarrow|\\longrightarrow|\\Longrightarrow|\\longleftrightarrow|\\Longleftrightarrow|\\longmapsto|\\hookrightarrow|\\rightharpoonup|\\rightharpoondown|\\uparrow|\\Uparrow|\\downarrow|\\Downarrow|\\updownarrow|\\Updownarrow|\\nearrow|\\searrow|\\swarrow|\\nwarrow)/11/g;
       $garbage=~s/(\\aleph|\\hbar|\\imath|\\jmath|\\ell|\\wp|\\Re|\\Im|\\mho|\\prime|\\emptyset|\\nabla|\\surd|\\partial|\\top|\\bot|\\vdash|\\dashv|\\forall|\\exists|\\neg|\\flat|\\natural|\\sharp|\\\||\\angle|\\backslash|\\Box|\\Diamond|\\triangle|\\clubsuit|\\diamondsuit|\\heartsuit|\\spadesuit|\\Join|\\infty)/11/g;
       $garbage=~s/(\\hat{([^}]+)}|\\check{([^}]+)}|\\dot{([^}]+)}|\\breve{([^}]+)}|\\acute{([^}]+)}|\\ddot{([^}]+)}|\\grave{([^}]+)}|\\tilde{([^}]+)}|\\mathring{([^}]+)}|\\bar{([^}]+)}|\\vec{([^}]+)})/$1/g;
       #remove some other LaTeX command
       $garbage=~s|\\(\w+)\\|\\|g;  
       $garbage=~s|\\(\w+)(\s*)|$2|g;  
       $garbage=~s|\+|11|g;
       my  $value=length($garbage);
       return $value;
   }
   
   
   
   
 1;  1;
 __END__  __END__

Removed from v.1.151  
changed lines
  Added in v.1.256


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