--- loncom/xml/londefdef.pm	2002/10/08 20:18:36	1.93
+++ loncom/xml/londefdef.pm	2023/03/25 22:11:11	1.471
@@ -1,8 +1,8 @@
 # The LearningOnline Network with CAPA
-# Tags Default Definition Module 
+# Tags Default Definition Module
+#
+# $Id: londefdef.pm,v 1.471 2023/03/25 22:11:11 raeburn Exp $
 #
-# $Id: londefdef.pm,v 1.93 2002/10/08 20:18:36 sakharuk Exp $
-# 
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,2518 +25,4819 @@
 # /home/httpd/html/adm/gpl.txt
 #
 # http://www.lon-capa.org/
-#
-# Copyright for TtHfunc and TtMfunc by Ian Hutchinson. 
-# TtHfunc and TtMfunc (the "Code") may be compiled and linked into 
-# binary executable programs or libraries distributed by the 
-# Michigan State University (the "Licensee"), but any binaries so 
+## Copyright for TtHfunc and TtMfunc by Ian Hutchinson.
+# TtHfunc and TtMfunc (the "Code") may be compiled and linked into
+# binary executable programs or libraries distributed by the
+# Michigan State University (the "Licensee"), but any binaries so
 # distributed are hereby licensed only for use in the context
-# of a program or computational system for which the Licensee is the 
-# primary author or distributor, and which performs substantial 
+# of a program or computational system for which the Licensee is the
+# primary author or distributor, and which performs substantial
 # additional tasks beyond the translation of (La)TeX into HTML.
 # The C source of the Code may not be distributed by the Licensee
 # 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;
 
 use Apache::lonnet;
 use strict;
 use Apache::lonxml;
-use Apache::File();
+use Apache::lontable;
 use Image::Magick;
+use Apache::lonmenu();
+use Apache::lonmeta();
+use Apache::lonlocal;
+use Apache::loncommon();
+use Apache::Constants qw(:common);
+use File::Basename;
+use LONCAPA();
+# use Data::Dumper;
 
 BEGIN {
 
-    &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','u','ul','var','wbr'));
+    &Apache::lonxml::register('Apache::londefdef',('a','abbr','acronym','accessrule','address','allow','applet','area','b','base','basefont','bgo','bgsound','big','blink','blockquote','blankspace','body','br','button','caption','center','cite','code','col','colgroup','dd','del','dfn','dir','div','dl','dt','em','embed','externallink','fieldset','font','form','frame','frameset','h1','h2','h3','h4','h5','h6','head','hr','html','i','iframe','img','input','ins','insert','isindex','kbd','keygen','label','layer','legend','li','link','m','map','marquee','menu','meta','multicol','nobr','noembed','noframes','nolayer','noscript','object','ol','optgroup','option','output','p','param','pre','q','s','samp','select','server','small','spacer','span','strike','strong','style','sub','sup','table','tbody','td','textarea','tfoot','th','thead','title','tr','tt','tthoption','u','ul','var','wbr','hideweboutput'));
+
+}
+
 
+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);
+    $Apache::londefdef::list_index=0;
+    undef($Apache::londefdef::head);
+    undef($Apache::londefdef::title);
 }
 
 #======================= TAG SUBROUTINES =====================
 #-- <output>
 sub start_output {
-  my ($target) = @_;
-  if ($target eq 'meta') { $Apache::lonxml::metamode--; }
-  return '';
+    my ($target) = @_;
+    if ($target eq 'meta') { $Apache::lonxml::metamode--; }
+    return '';
 }
 sub end_output {
-  my ($target) = @_;
-  if ($target eq 'meta') { $Apache::lonxml::metamode++; }
-  return '';
+    my ($target) = @_;
+    if ($target eq 'meta') { $Apache::lonxml::metamode++; }
+    return '';
 }
 #-- <m> tag
 sub start_m {
-  my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-  my $currentstring = '';
-  if ($target eq 'web') {
-    $Apache::lonxml::prevent_entity_encode++;
-    my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
-    $inside ='\\documentstyle{article}'.$inside;
-    &Apache::lonxml::debug("M is starting with:$inside:");
-    my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
-    if ($eval eq 'on') {
-      $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
-      #&Apache::lonxml::debug("M is evaulated to:$inside:");
-    }
-    $currentstring = &Apache::lontexconvert::converted(\$inside);
-    if ($Apache::lontexconvert::errorstring) {
-      &Apache::lonxml::warning("tth error: ".
-			       $Apache::lontexconvert::errorstring);
-      $Apache::lontexconvert::errorstring='';
-    }
-    #&Apache::lonxml::debug("M is ends with:$currentstring:");
-  } elsif ($target eq 'tex') {
-    $currentstring = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
-    if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
-  } else {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+    my $currentstring = '';
     my $inside = &Apache::lonxml::get_all_text_unbalanced("/m",$parser);
-  }
-  return $currentstring;
+    if ($target eq 'web' || $target eq 'analyze') {
+	&Apache::lonxml::debug("M is starting with:$inside:");
+        if (!($inside =~ /^\s*\$.*\$\s*$/ || $inside =~ /^\s*\\[([].*\\[)\]]\s*$/)) {
+            # Non-math LaTeX will not be rendered correctly with MathJax
+            # and it should be avoided anyway.
+            # On top of that, MathJax will render math without $, but
+            # it will fail with tth. This is worth a warning.
+            # (even though some people might just use latex for printing)
+            &Apache::lonxml::warning(&mt('Missing $ in [_1].','&lt;m&gt;'));
+        } elsif (($env{'browser.type'} eq 'safari') && ($env{'form.editxmltext'}) &&
+                 (($env{'form.problemmode'} eq 'view') || ($env{'form.problemmode'} eq 'discard'))) {
+            my $delimiter;
+            if ($inside =~ /\$$/) {
+                $delimiter = '$';
+            } elsif ($inside =~ /\\([)\]])$/) {
+                $delimiter = $1;
+            }
+            if ($delimiter) {
+                &Apache::lonxml::warning(&mt('Insert a space between [_1] and [_2].',
+                                             $delimiter,'&lt;/m&gt;'));
+            }
+        }
+	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
+	if ($eval eq 'on') {
+	    $inside=&Apache::run::evaluate($inside,$safeeval,$$parstack[-1]);
+	    #&Apache::lonxml::debug("M is evaluated to:$inside:");
+	}
+	my $tex = $inside;
+	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
+	$currentstring = &Apache::lontexconvert::converted(\$inside,$display);
+	if ($Apache::lontexconvert::errorstring) {
+	    my $errormsg='<pre>'.&HTML::Entities::encode($Apache::lontexconvert::errorstring,'<>&"').'</pre> occurred while attempting to convert this TeX: <pre>';
+	    $tex = &HTML::Entities::encode($tex,'<>&"');
+	    my ($linenumber) =
+		($Apache::lontexconvert::errorstring =~ /Line (\d+)/);
+	    if (defined($linenumber)) {
+		my @tex=split("\n",$tex);
+		$tex[$linenumber]='<b><font color="red">'.
+		    $tex[$linenumber].'</font></b>';
+		$tex=join("\n",@tex);
+	    }
+	    &Apache::lonxml::warning($errormsg.$tex.'</pre>');
+	    $Apache::lontexconvert::errorstring='';
+	}
+	#&Apache::lonxml::debug("M is ends with:$currentstring:");
+	$Apache::lonxml::post_evaluate=0;
+    } elsif ($target eq 'tex') {
+
+	$currentstring = $inside;
+	my $eval=&Apache::lonxml::get_param('eval',$parstack,$safeeval);
+	if ($eval eq 'on') {
+	    $currentstring=&Apache::run::evaluate($currentstring,$safeeval,$$parstack[-1]);
+	}
+	if ($currentstring=~/^(\s*\\\\\s*)*$/) {$currentstring = ' \vskip 0 mm ';}
+	# detect simple math mode entry exits, and convert them
+        # to use \ensuremath ... unless there's a \verb inside.
+	if (! ($currentstring=~/\\verb/)) {
+	    if ($currentstring=~/^\s*\$[^\$].*\$\s*$/) {
+		$currentstring=~s/^(\s*)\$/$1/;
+		$currentstring=~s/\$(\s*)$/$1/;
+		$currentstring='\ensuremath{'.$currentstring.'}';
+	    }
+	}
+	$Apache::lonxml::post_evaluate=0;
+    }
+    return $currentstring;
 }
+
 sub end_m {
-  my ($target,$token) = @_;
-  my $currentstring = '';
-  if ($target eq 'web') {
-    $Apache::lonxml::prevent_entity_encode--;
-  } elsif ($target eq 'tex') {
-    $currentstring = "";
-  } elsif ($target eq 'meta') {
-  }
-  return $currentstring;
-}
-#-- <html> tag    
-      sub start_html {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-	    if ($ENV{'browser.mathml'}) {
-	      &tth::ttminit();
-	    } else {
-	      &tth::tthinit();
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'tex') {
+	$currentstring = "";
+    }
+    return $currentstring;
+}
+
+sub start_tthoption {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+    my $result;
+    if ($target eq 'web' || $target eq 'webgrade') {
+	my $inside = &Apache::lonxml::get_all_text("/tthoption",$parser,
+						   $style);
+	$inside=~s/^\s*//;
+	if ($env{'browser.mathml'}) {
+	    &tth::ttmoptions($inside);
+	} else {
+	    &tth::tthoptions($inside);
+	}
+    }
+    return $result;
+}
+
+sub end_tthoption {
+    my ($target,$token) = @_;
+    my $result;
+    return $result;
+}
+
+#-- <html> tag (end tag optional)
+sub start_html {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'edit' || $target eq 'webgrade' ) {
+	# start_body() takes care of emitting the <html>
+    } elsif ($target eq 'tex') {
+
+	$currentstring .= &latex_header();
+    }
+    return $currentstring;
+}
+
+sub end_html {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	# end_body takes care of the </html>
+    }
+    return $currentstring;
+}
+
+#-- <head> tag (end tag optional)
+sub start_head {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	&Apache::lonxml::startredirection();
+    }
+    return $currentstring;
+}
+
+sub end_head {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if (($target eq 'web'      && $env{'request.state'} eq 'published') ||
+	($target eq 'webgrade' && $env{'request.state'} eq 'published')) {
+	# in case there is a </head> but no <head>
+	if ($Apache::lonxml::redirection) {
+	    $Apache::londefdef::head = &Apache::lonxml::endredirection();
+	}
+    }
+    return $currentstring;
+}
+
+#-- <map> tag (end tag required)
+sub start_map {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_map {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <select> tag (end tag required)
+sub start_select {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }  elsif ($target eq 'tex') {
+	$Apache::londefdef::select=0;
+    }
+    return $currentstring;
+}
+
+sub end_select {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <option> tag (end tag optional)
+sub start_option {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$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 $currentstring;
+}
+
+sub end_option {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }  elsif ($target eq 'tex') {
+	$currentstring='}';
+    }
+    return $currentstring;
+}
+
+#-- <input> tag (end tag forbidden)
+sub start_input {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_input {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <textarea> tag (end tag required)
+sub start_textarea {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_textarea {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <form> tag (end tag required)
+sub start_form {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_form {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <title> tag (end tag required)
+sub start_title {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$Apache::londefdef::title =
+	    &Apache::lonxml::get_all_text('/title',$parser,$style);
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\keephidden{Title of the document:  ';
+    }
+    if ($target eq 'meta') {
+	$currentstring='<title>';
+	&start_output($target);
+    }
+    return $currentstring;
+}
+
+sub end_title {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	# start_title takes care of swallowing the title
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}';
+    }
+    if ($target eq 'meta') {
+	&end_output($target);
+	$currentstring='</title>';
+    }
+    return $currentstring;
+}
+
+#-- <meta> tag (end tag forbidden)
+sub start_meta {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	my $args='';
+	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
+	if ($args eq '') {
+	    &Apache::lonxml::get_all_text("/meta",$parser,$style);
+	} else {
+	    $currentstring = $token->[4];
+	}
+        if ($env{'form.grade_imsexport'}) {
+            $currentstring = '';
+        }
+    } elsif ($target eq 'meta') {
+	unless (&Apache::lonxml::get_param
+		('http-equiv',$parstack,$safeeval,undef,1)) {
+	    my $name=$token->[2]->{'name'};
+	    $name=~tr/A-Z/a-z/;
+	    $name=~s/\s/\_/gs;
+	    $name=~s/\W//gs;
+	    if ($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
+			('content',$parstack,$safeeval,undef,1).
+			'</'.$name.'>';
 	    }
-            if ($target eq 'web') {
-              $currentstring = &Apache::lonxml::xmlbegin().
-                               &Apache::lonxml::fontsettings();     
-	    } elsif ($target eq 'tex') {
-	      @Apache::londefdef::table = ();
-	      $currentstring .= '\documentclass[letterpaper]{article}
-                                 \newcommand{\keephidden}[1]{}
-                                 \renewcommand{\deg}{$^{\circ}$}
-                                 \usepackage[dvips]{graphicx}
-                                 \usepackage{epsfig}\usepackage{calc}
-                                 \newenvironment{choicelist}{\begin{enumerate}}{\end{enumerate}}';
-	    }
-	   return $currentstring;
-	}
-        sub end_html {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-		$currentstring = &Apache::lonxml::xmlend();
-	    }
-	   return $currentstring;
-	}
-#-- <head> tag
-      sub start_head {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_head {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = &Apache::lonxml::registerurl(undef,$target).
-                               $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <map> tag
-      sub start_map {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_map {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <select> tag
-      sub start_select {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_select {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <option> tag
-      sub start_option {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_option {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <input> tag
-      sub start_input {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_input {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <textarea> tag
-      sub start_textarea {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_textarea {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <form> tag
-      sub start_form {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_form {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <title> tag
-      sub start_title {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring .= '\keephidden{' 
-	    }
-            if ($target eq 'meta') {
-		$currentstring='<title>';
-                &start_output();
+            my $display=&Apache::lonxml::get_param
+		('display',$parstack,$safeeval,undef,1);
+            if ($display) {
+		$display=&HTML::Entities::encode($display,'<>&"');
+		$currentstring.='<'.$name.'.display>'.$display.
+                               '</'.$name.'.display>';
             }
-	   return $currentstring;
 	}
-        sub end_title {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } elsif ($target eq 'tex') {
-              $currentstring .= '}';
-	    }  
-            if ($target eq 'meta') {
-               &end_output();
-               $currentstring='</title>';
-            } 
-	   return $currentstring;
-	}
-#-- <meta> tag
-      sub start_meta {
-	    my ($target,$token,$tagstack,$parstack,$parser) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	      my $args='';
-	      if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
-	      if ($args eq '') {
-		&Apache::lonxml::get_all_text("/meta",$$parser[$#$parser]);
-	      } else {
+    } elsif ($target eq 'tex') {
+	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
+	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
+	if ((not defined $content) && (not defined $name)) {
+	    &Apache::lonxml::startredirection();
+	}
+    } elsif ($target eq 'edit') {
+	$currentstring .= &Apache::edit::tag_start($target,$token);
+	$currentstring .= &Apache::edit::text_arg('Name:','name',$token,30);
+	$currentstring .= &Apache::edit::text_arg('Content:','content',$token,70);
+	$currentstring .= &Apache::edit::end_row();
+    } elsif ($target eq 'modified') {
+	my $constructtag =
+	    &Apache::edit::get_new_args($token,$parstack,$safeeval,
+					'name','content');
+	if ($constructtag) { $currentstring = &Apache::edit::rebuild_tag($token); }
+    }
+    return $currentstring;
+}
+
+sub end_meta {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	my $args='';
+	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
+	if ($args ne '') {
+	    $currentstring = $token->[4];
+	}
+    } elsif ($target eq 'tex') {
+	my $content=&Apache::lonxml::get_param('content',$parstack,$safeeval);
+	my $name=&Apache::lonxml::get_param('name',$parstack,$safeeval);
+	if ((not defined $content) && (not defined $name)) {
+	    &Apache::lonxml::endredirection();
+	}
+    }
+    return $currentstring;
+}
+
+sub insert_meta {
+    return '
+    <meta />';
+}
+
+#-- <start> tag
+sub start_style {
+	my ($target, $token, $tagstack, $parstack, $parser, $safeeval, $style) = @_;
+	my $currentstring = '';
+
+	if ($target eq 'tex') {
+		Apache::lonxml::startredirection();
+	} else {
 		$currentstring = $token->[4];
-	      }
-	    }
-            if ($target eq 'meta') {
-		unless ($token->[2]->{'http-equiv'}) {
-		    my $name=$token->[2]->{'name'};
-                    $name=~tr/A-Z/a-z/;
-                    $name=~s/\s/\_/g;
-                    if ($name) {
-                       $currentstring='<'.$name.'>'.
-                                         $token->[2]->{'content'}.
-			              '</'.$name.'>';
-		    }
-                }
-	    }
-	   return $currentstring;
 	}
-      sub end_meta {
-	my ($target,$token,$tagstack,$parstack,$parser) = @_;
+	
+	return $currentstring;
+}
+
+sub end_style {
+	my ($target, $token, $tagstack, $parstack, $parser, $safeeval) = @_;
 	my $currentstring = '';
-	if ($target eq 'web') {
-	  my $args='';
-	  if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
-	  if ($args ne '') {
-	    $currentstring = $token->[4];
-	  }
-	} 
+
+	if ($target eq 'tex') {
+		Apache::lonxml::endredirection();
+	} else {
+		$currentstring = $token->[2];
+	}
 	return $currentstring;
-      }
-#-- <body> tag
-        sub start_body {
-            my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	      if (!$Apache::lonxml::registered) {
-		$currentstring.='<head>'.
-		    &Apache::lonxml::registerurl(undef,$target).'</head>';
-	      }
-	      my $onLoad='';
-	      foreach my $key (keys(%{$token->[2]})) {
-		if ($key =~ /^onload$/i) {
-		  $onLoad.=$token->[2]->{$key}.';';
-		  delete($token->[2]->{$key});
-		}
-	      }
-	      $token->[2]->{'onLoad'}=&Apache::lonxml::loadevents().
-		                       ';'.$onLoad;
-	      my $onUnload='';
-	      foreach my $key (keys(%{$token->[2]})) {
-		if ($key =~ /^onunload$/i) {
-		  $onUnload.=$token->[2]->{$key}.';';
-		  delete($token->[2]->{$key});
-		}
-	      }
-	      $token->[2]->{'onUnload'}=&Apache::lonxml::unloadevents().
-		                         ';'.$onUnload;
-
-	      $currentstring .= '<'.$token->[1];
-	      foreach (keys %{$token->[2]}) {
-	      	$currentstring.=' '.$_.'="'.$token->[2]->{$_}.'"';
-	      }
-	      $currentstring.='>';
-	      if ($ENV{'request.state'} ne 'published') {
-		$currentstring.=(<<EDITBUTTON);
-		<form method="post">
-		<input type="submit" name="editmode" value="Edit" />
-		</form>
-EDITBUTTON
-	      }
-       	    } elsif ($target eq 'tex') {
-              $currentstring = '\begin{document}';  
-	    } 
-	   return $currentstring;
-	}
-        sub end_body {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '\end{document}';  
-	    } 
-	   return $currentstring;
-	}
-#-- <center> tag
-        sub start_center {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '\begin{center}';  
-	    }  elsif ($target eq 'latexsource') {
-              $currentstring = '\begin{center}';  
-	    } 
-	   return $currentstring;
-	}
-        sub end_center {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '\end{center}';  
-	    }  elsif ($target eq 'latexsource') {
-              $currentstring = '\end{center}';  
-	    } 
-	   return $currentstring;
-	}
-#-- <b> tag
-        sub start_b {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '\textbf{';  
-	    }  elsif ($target eq 'latexsource') {
-              $currentstring = '\textbf{';  
-	    } 
-	   return $currentstring;
-	}
-        sub end_b {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '}';  
-
-	    } elsif ($target eq 'latexsource') {
-              $currentstring = '}';  
-	    } 
-	   return $currentstring;
-	}
-#-- <strong> tag
-        sub start_strong {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '\textbf{';  
-	    } elsif ($target eq 'latexsource') {
-              $currentstring = '\textbf{';  
-	    } 
-	   return $currentstring;
-	}
-        sub end_strong {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-
-              $currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '}';  
-	    }  elsif ($target eq 'latexsource') {
-              $currentstring = '}';  
-	    } 
-	   return $currentstring;
-	}
-#-- <h1> tag
-        sub start_h1 {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '{\large \textbf{';
-	    } elsif ($target eq 'meta') {
-		$currentstring='<subject>';
-                &start_output();
+}
+
+# accessrule
+sub start_accessrule {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+    my $currentstring = '';
+    my $eff  =&Apache::lonxml::get_param('effect',$parstack,$safeeval,undef,1);
+    my $realm=&Apache::lonxml::get_param('realm', $parstack,$safeeval,undef,1);
+    my $role =&Apache::lonxml::get_param('role',  $parstack,$safeeval,undef,1);
+    my $type =&Apache::lonxml::get_param('type',  $parstack,$safeeval,undef,1);
+
+    my ($dom,$crs,$sec,$separator);
+    if ($type eq 'user') {
+	($dom,$crs,$sec)=split(m{/},$realm);
+	$crs = &LONCAPA::clean_username($crs);
+	$separator = '/';
+    } else {
+	($dom,$crs,$sec)=split(/\_/,$realm);
+	$crs = &LONCAPA::clean_courseid($crs);
+	$separator = '_';
+    }
+    $dom = &LONCAPA::clean_domain($dom);
+
+    $sec =~s/\W//;
+    $realm = $dom;
+    if ($crs =~ /\S/) { $realm .= $separator.$crs; }
+    if ($sec =~ /\S/) { $realm .= $separator.$sec; }
+    $role=~s/\W//g;
+
+    if ($target eq 'web') {
+	my $args='';
+	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
+	if ($args eq '') {
+	    &Apache::lonxml::get_all_text("/accessrule",$parser,$style);
+	} else {
+	    $currentstring = $token->[4];
+	}
+    }
+    if ($target eq 'meta') {
+	$currentstring='<rule>'.$eff.':'.$realm.':'.$role.':'.$type.'</rule>';
+    }
+    return $currentstring;
+}
+
+sub end_accessrule {
+    my ($target,$token,$tagstack,$parstack,$parser) = @_;
+    my $currentstring = '';
+    if ($target eq 'web') {
+	my $args='';
+	if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
+	if ($args ne '') {
+	    $currentstring = $token->[4];
+	}
+    }
+    return $currentstring;
+}
+
+sub generate_css_links {
+    my $links;
+    my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
+    if ($css_href =~ /\S/) {
+	&Apache::lonxml::extlink($css_href);
+	$links .=
+	    '<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
+    }
+    return $links;
+}
+
+#-- <body> tag (end tag required)
+sub start_body {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+
+    if ($target eq 'web' || $target eq 'webgrade') {
+	if ($Apache::lonhomework::parsing_a_problem) {
+	    &Apache::lonxml::warning("<body> tag found inside of <problem> tag this can cause problems.");
+	    return '';
+	}
+	
+	if (&is_inside_of($tagstack, "head")) {
+	    &end_head(@_);
+	}
+	
+	my $extra_head = &generate_css_links();
+
+    # Breadcrumbs
+    &Apache::lonhtmlcommon::clear_breadcrumbs();
+    if ($env{'request.state'} eq 'construct') {
+        my $url=&Apache::lonnet::hreflocation('',$env{'request.filename'});
+        &Apache::lonhtmlcommon::add_breadcrumb({
+            'text'  => 'Authoring Space',
+            'href'  => &Apache::loncommon::authorspace($url),
+        });
+        &Apache::lonhtmlcommon::add_breadcrumb({
+            'text'  => 'HTML Editor',
+            'href'  => '',
+        });
+        # breadcrumbs (and tools) will be created
+        # in start_page->bodytag->innerregister
+    } else {
+        # FIXME Where are we?
+    }
+
+        my $args = {'add_entries'    => $token->[2],
+                    'force_register' => 1,};
+        if ($target eq 'web') {
+            $args->{'print_suppress'} = 1;
+            if ($env{'request.use_absolute'}) {
+                $args->{'use_absolute'} = $env{'request.use_absolute'};
+            }
+        }
+	$currentstring =
+	    &Apache::loncommon::start_page($Apache::londefdef::title,
+					   $Apache::londefdef::head
+					      .$extra_head,$args);
+        my $header = '';
+        if ($env{'request.state'} ne 'published' &&
+            $env{'request.state'} ne 'construct') {
+            $header=&Apache::lonmenu::constspaceform();
+        }
+        if ($env{'request.state'} ne 'published') {
+            unless ($env{'form.inhibitmenu'} eq 'yes') {
+                $header.=&edit_controls();
+            }
+        }
+        if ($env{'request.state'} eq 'construct') {
+            unless ($env{'form.inhibitmenu'} eq 'yes') {
+                $currentstring.=&Apache::loncommon::head_subbox(
+                                    &Apache::loncommon::CSTR_pageheader()
+                                   .$header);
+            }
+        } elsif ($env{'request.state'} eq 'edit') {
+            $currentstring.=&Apache::loncommon::head_subbox($header);
+        }
+        $currentstring.=&Apache::lonxml::message_location();
+    } elsif ($target eq 'tex') {
+        $currentstring = '';   #  '\begin{document}' is in header.
+    }
+
+    return $currentstring;
+}
+
+sub edit_controls {
+    my ($nochgview) = @_;
+    my $result .= '
+<form method="post" action="">
+<div class="LC_edit_problem_header">';
+    unless ($nochgview) {
+        $result .= '
+<div class="LC_edit_problem_header_row1">'.
+&Apache::lonxml::renderingoptions().'
+<input type="submit" name="changeproblemmode" value="'.&mt('Change View').'" />
+</div>';
+    }
+    $result .= '
+<div><input type="submit" name="editmode" accesskey="e" value="'.&mt('Edit').'" />';
+    if ($env{'browser.type'} ne 'explorer' || $env{'browser.version'} > 9) {
+        my $uri = $env{'request.uri'};
+        my $daxeurl = '/daxepage'.$uri;
+        $result .= '<input type="button" value="'.&mt('Edit with Daxe').'" '.
+                  'onclick="window.open(\''.$daxeurl.'\',\'_blank\');" />';
+    }
+    if (($env{'request.course.id'}) && ($env{'form.forceedit'})) {
+        my $url=&Apache::lonnet::hreflocation('',$env{'request.filename'});
+        if ($url =~ /\.html?$/i) {
+            my ($cdom,$cnum);
+            if ($env{'request.course.id'}) {
+                $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+                $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+                if ($env{'request.filename'} =~ m{/userfiles/supplemental/default|\d+/}) {
+                    if (&Apache::lonnet::is_course_upload($env{'request.filename'},
+                                                          $cnum,$cdom)) {
+                        &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
+                                                                ['folderpath','title']);
+                    }
+                }
+            }
+            my ($symb,$itemtitle,$displayfile,$caller);
+            if ($url =~ m{^/uploaded/$cdom/$cnum/portfolio/syllabus/}) {
+                $itemtitle = &mt('Syllabus');
+                $caller = "/public/$cdom/$cnum/syllabus";
+            } else {
+                $caller = $url;
+                ($symb,$itemtitle,$displayfile) =
+                    &Apache::lonxml::get_courseupload_hierarchy($url,
+                                                                $env{'form.folderpath'},
+                                                                $env{'form.title'});
             }
-           return $currentstring;
+            if (($symb ne '') || ($env{'httpref.'.$url} ne '') ||
+                ($url =~ m{^/uploaded/$cdom/$cnum/portfolio/syllabus/})) {
+                  $result .= ('&nbsp;' x 3).
+                             &Apache::lonhtmlcommon::dependencies_button()."\n".
+                             &Apache::lonhtmlcommon::dependencycheck_js($symb,
+                                 $itemtitle,$url,$env{'form.folderpath'},$caller)."\n";
+            }
+        }
+    }
+    $result .= '</div>
+</div>
+</form>
+';
+    return $result;
+}
+
+sub end_body {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# Close off unclosed <p>
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= &Apache::loncommon::end_page({'discussion' => 1});
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\strut\newline\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\newline\noindent \end{document}';
+    }
+    return $currentstring;
+}
+
+# \begin{center} causes a new paragprah spacing that looks odd inside
+# of a table cell.  Same at the end of a \center but with a slightly
+# larger space .. hence center_correction and center_end_correction.
+#
+sub center_correction { return '\vspace*{-6 mm}'; }
+sub center_end_correction { return '\vspace*{-7 mm}'; }
+
+#-- <center> tag (end tag required)
+sub start_center {
+    my ($target,$token,$tagstack) = @_;
+    my $currentstring = &end_p();	# Close off any prior para.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	if (&is_inside_of($tagstack, "table")) {
+	    $currentstring .= &center_correction();
 	}
-        sub end_h1 {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '}}';
-	    } elsif ($target eq 'meta') {
-                &end_output();
-		$currentstring='</subject>';
-            } 
-           return $currentstring;
+	$currentstring .= '\begin{center}';
+    }
+    return $currentstring;
+}
+
+sub end_center {
+    my ($target,$token,$tagstack) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring = '\end{center}';
+	if (&is_inside_of($tagstack, "table")) {
+	    $currentstring .= &center_end_correction();
 	}
+    }
+    return $currentstring;
+}
+
+#-- <b> tag (end tag required)
+#      NOTE: In TeX mode disables internal <p>
+sub start_b {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	&disable_para();
+	$currentstring .= '\textbf{';
+    }
+    return $currentstring;
+}
+
+sub end_b {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	&enable_para();
+	$currentstring = '}';
+    }
+    return $currentstring;
+}
+
+#-- <strong> tag (end tag required)
+#    NOTE: in TeX mode disables internal <p>
+sub start_strong {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	&disable_para();
+	$currentstring = '\textbf{';
+    }
+    return $currentstring;
+}
+
+sub end_strong {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {	
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	&enable_para();
+	$currentstring = '}';
+    }
+    return $currentstring;
+}
+
+#-- <h1> tag (end tag required)
+sub start_h1 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# Close off any prior para.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	my $pre;
+	my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
+	if ($align eq 'center') {
+	    $pre='\begin{center}';
+	} elsif ($align eq 'left') {
+	    $pre='\rlap{';
+	} elsif ($align eq 'right') {
+	    $pre=' \hfill \llap{';
+	}
+	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
+	if (not defined $TeXsize) {$TeXsize="large";}
+	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
+    } elsif ($target eq 'meta') {
+	$currentstring.='<subject>';
+	&start_output($target);
+    }
+    return $currentstring;
+}
+
+sub end_h1 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	my $post='\vskip 0 mm ';
+	my $align=lc(&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1));
+	if ($align eq 'center') {
+	    $post='\end{center}';
+	} elsif ($align eq 'left') {
+	    $post='} \hfill'.'\vskip 0 mm ';
+	} elsif ($align eq 'right') {
+	    $post='}'.'\vskip 0 mm ';
+	}
+	$currentstring .= '}}'.$post;
+    } elsif ($target eq 'meta') {
+	&end_output($target);
+	$currentstring='</subject>';
+    }
+    return $currentstring;
+}
+
 #-- <h2> tag
-        sub start_h2 {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '{\large \textbf{';
-	    } 
-           return $currentstring;
-	}
-        sub end_h2 {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '}}';
-	    } 
-           return $currentstring;
+sub start_h2 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# Close off any prior para.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	my $pre;
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if ($align eq 'center') {
+	    $pre='\begin{center}';
+	} elsif ($align eq 'left') {
+	    $pre='\rlap{';
+	} elsif ($align eq 'right') {
+	    $pre=' \hfill \llap{';
+	}
+	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
+	if (not defined $TeXsize) {$TeXsize="large";}
+	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
+    }
+    return $currentstring;
+}
+
+sub end_h2 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	my $post='\vskip 0 mm ';
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if ($align eq 'center') {
+	    $post='\end{center}';
+	} elsif ($align eq 'left') {
+	    $post='} \hfill'.'\vskip 0 mm ';
+	} elsif ($align eq 'right') {
+	    $post='}'.'\vskip 0 mm ';
 	}
+	$currentstring .= '}}'.$post;
+    }
+    return $currentstring;
+}
+
 #-- <h3> tag
-        sub start_h3 {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '{\large \textbf{';
-	    } 
-           return $currentstring;
-	}
-        sub end_h3 {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '}}';
-	    } 
-           return $currentstring;
+sub start_h3 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# Close off any prior para.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	my $pre;
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if ($align eq 'center') {
+	    $pre='\begin{center}';
+	} elsif ($align eq 'left') {
+	    $pre='\rlap{';
+	} elsif ($align eq 'right') {
+	    $pre=' \hfill \llap{';
+	}
+	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
+	if (not defined $TeXsize) {$TeXsize="large";}
+	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
+    }
+    return $currentstring;
+}
+
+sub end_h3 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	my $post='\vskip 0 mm ';
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if ($align eq 'center') {
+	    $post='\end{center}';
+	} elsif ($align eq 'left') {
+	    $post='} \hfill'.'\vskip 0 mm ';
+	} elsif ($align eq 'right') {
+	    $post='}'.'\vskip 0 mm ';
 	}
+	$currentstring .= '}}'.$post;
+    }
+    return $currentstring;
+}
+
 #-- <h4> tag
-        sub start_h4 {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '{\large \textbf{';
-	    } 
-           return $currentstring;
-	}
-        sub end_h4 {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '}}';
-	    } 
-           return $currentstring;
+sub start_h4 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# Close off any prior para.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	my $pre;
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if ($align eq 'center') {
+	    $pre='\begin{center}';
+	} elsif ($align eq 'left') {
+	    $pre='\rlap{';
+	} elsif ($align eq 'right') {
+	    $pre=' \hfill \llap{';
+	}
+	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
+	if (not defined $TeXsize) {$TeXsize="large";}
+	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
+    }
+    return $currentstring;
+}
+
+sub end_h4 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	my $post='\vskip 0 mm ';
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if ($align eq 'center') {
+	    $post='\end{center}';
+	} elsif ($align eq 'left') {
+	    $post='} \hfill'.'\vskip 0 mm ';
+	} elsif ($align eq 'right') {
+	    $post='}'.'\vskip 0 mm ';
 	}
+	$currentstring .= '}}'.$post;
+    }
+    return $currentstring;
+}
+
 #-- <h5> tag
-        sub start_h5 {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '{\large \textbf{';
-	    } 
-           return $currentstring;
-	}
-        sub end_h5 {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '}}';
-	    } 
-           return $currentstring;
+sub start_h5 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# Close off any prior paras.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	my $pre;
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if ($align eq 'center') {
+	    $pre='\begin{center}';
+	} elsif ($align eq 'left') {
+	    $pre='\rlap{';
+	} elsif ($align eq 'right') {
+	    $pre=' \hfill \llap{';
+	}
+	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
+	if (not defined $TeXsize) {$TeXsize="large";}
+	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
+    }
+    return $currentstring;
+}
+
+sub end_h5 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	my $post='\vskip 0 mm ';
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if ($align eq 'center') {
+	    $post='\end{center}';
+	} elsif ($align eq 'left') {
+	    $post='} \hfill'.'\vskip 0 mm ';
+	} elsif ($align eq 'right') {
+	    $post='}'.'\vskip 0 mm ';
 	}
+	$currentstring .= '}}'.$post;
+    }
+    return $currentstring;
+}
+
 #-- <h6> tag
-        sub start_h6 {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '{\large \textbf{';
-	    } 
-           return $currentstring;
-	}
-        sub end_h6 {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '}}';
-	    } 
-           return $currentstring;
-	}
-#--- <cite> tag
-        sub start_cite {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= "\\textit{";
-	    }  elsif ($target eq 'latexsource') {
-		$currentstring .= "\\textit{";
-	    } 
-           return $currentstring;
-	}
-        sub end_cite {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
-	    }  elsif ($target eq 'latexsource') {
-		$currentstring .= "}";
-	    } 
-           return $currentstring;
-	}
-#-- <i> tag
-        sub start_i {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '\textit{';
-	    }  elsif ($target eq 'latexsource') {
-		$currentstring .= '\textit{';
-	    } 
-           return $currentstring;
-	}
-        sub end_i {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '}';
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= '}';
-	    } 
-           return $currentstring;
-	}
-#-- <address> tag
-        sub start_address {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= "\\textit{";
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= "\\textit{";
-	    } 
-           return $currentstring;
-	}
-        sub end_address {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= "}";
-	    }
-           return $currentstring;
-	}
-#-- <dfn> tag
-        sub start_dfn {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= "\\textit{";
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= "\\textit{";
-	    } 
-           return $currentstring;
-	}
-        sub end_dfn {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= "}";
-	    } 
-           return $currentstring;
-	}
-#-- <tt> tag
-        sub start_tt {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '\texttt{';
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= '\texttt{';
-	    } 
-           return $currentstring;
-	}
-        sub end_tt {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '}';
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= '}';
-	    }
-           return $currentstring;
-	}
-#-- <kbd> tag
-        sub start_kbd {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= "\\texttt";
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= "\\texttt{";
-	    } 
-           return $currentstring;
-	}
-        sub end_kbd {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= "}";
-	    } 
-           return $currentstring;
-	}
-#-- <code> tag
-        sub start_code {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '\texttt{';
-	    } 
-           return $currentstring;
-	}
-        sub end_code {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '}';
-	    } 
-           return $currentstring;
-	}
-#-- <em> tag
-        sub start_em {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '\emph{';
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= '\emph{';
-	    } 
-           return $currentstring;
-	}
-        sub end_em {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '}';
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= '}';
-	    }  
-           return $currentstring;
-	}
-#-- <q> tag
-        sub start_q {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= "\\emph{";
-	    }  elsif ($target eq 'latexsource') {
-		$currentstring .= "\\emph{";
-	    }
-           return $currentstring;
-	}
-        sub end_q {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= "}";
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= "}";
-	    }  
-           return $currentstring;
-	}
-#-- <p> tag
-        sub start_p {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '{\par ';
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= '{\par ';
-	    } 
-           return $currentstring;
-	}
-        sub end_p {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-	        $currentstring .= '}';
-            } elsif ($target eq 'latexsource') {
-	        $currentstring .= '}';
-            }
-           return $currentstring;
+sub start_h6 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# Close off any prior paras.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	my $pre;
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if ($align eq 'center') {
+	    $pre='\begin{center}';
+	} elsif ($align eq 'left') {
+	    $pre='\rlap{';
+	} elsif ($align eq 'right') {
+	    $pre=' \hfill \llap{';
+	}
+	my $TeXsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval,undef,0);
+	if (not defined $TeXsize) {$TeXsize="large";}
+	$currentstring .= '\strut\newline '.$pre.'{\\'.$TeXsize.' \textbf{';
+    }
+    return $currentstring;
+}
+
+sub end_h6 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	my $post='\vskip 0 mm ';
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if ($align eq 'center') {
+	    $post='\end{center}';
+	} elsif ($align eq 'left') {
+	    $post='} \hfill'.'\vskip 0 mm ';
+	} elsif ($align eq 'right') {
+	    $post='}'.'\vskip 0 mm ';
 	}
-#-- <br> tag
-        sub start_br {
-	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		if ($$tagstack[-2] ne 'sub' && $$tagstack[-2] ne 'sup') {
-		    $currentstring .= '\vskip 0 mm';
-		}
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= '\\';
-	    } 
-           return $currentstring;
-	}
-        sub end_br {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    }
-           return $currentstring;
-	}
-#-- <big> tag
-        sub start_big {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '\large{';
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= '{\Large ';
-	    }  
-           return $currentstring;
-	}
-        sub end_big {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-	        $currentstring .= '}';
-            } elsif ($target eq 'latexsource') {
-	        $currentstring .= '}';
-            }
-           return $currentstring;
+	$currentstring .= '}}'.$post;
+    }
+    return $currentstring;
+}
+
+#--- <cite> tag (end tag required)
+sub start_cite {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\textit{';
+    }
+    return $currentstring;
+}
+
+sub end_cite {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}';
+    }
+    return $currentstring;
+}
+
+#-- <i> tag (end tag required)
+sub start_i {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\textit{';
+    }
+    return $currentstring;
+}
+
+sub end_i {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}';
+    }
+    return $currentstring;
+}
+
+#-- <address> tag (end tag required)
+sub start_address {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\textit{';
+    }
+    return $currentstring;
+}
+
+sub end_address {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}';
+    }
+    return $currentstring;
+}
+
+#-- <dfn> tag (end tag required)
+sub start_dfn {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\textit{';
+    }
+    return $currentstring;
+}
+
+sub end_dfn {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}';
+    }
+    return $currentstring;
+}
+
+#-- <tt> tag (end tag required)
+sub start_tt {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\texttt{';
+    }
+    return $currentstring;
+}
+
+sub end_tt {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}';
+    }
+    return $currentstring;
+}
+
+#-- <kbd> tag (end tag required)
+sub start_kbd {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\texttt{';
+    }
+    return $currentstring;
+}
+
+sub end_kbd {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}';
+    }
+    return $currentstring;
+}
+
+#-- <code> tag (end tag required)
+sub start_code {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\texttt{';
+    }
+    return $currentstring;
+}
+
+sub end_code {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}';
+    }
+    return $currentstring;
+}
+
+#-- <em> tag (end tag required)
+sub start_em {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\emph{';
+    }
+    return $currentstring;
+}
+
+sub end_em {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}';
+    }
+    return $currentstring;
+}
+
+#-- <q> tag (end tag required)
+sub start_q {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\emph{';
+    }
+    return $currentstring;
+}
+
+sub end_q {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}';
+    }
+    return $currentstring;
+}
+
+#  <p> is a bit strange since it does not require a closing </p>
+#  However in latex, we must often output closing stuff to end
+#  environments and {}'s etc.  Therefore we do all the work
+#  of figuring out the ending strings in the start tag processing,
+#  and provide a mechanism to output the stop text external
+#  to tag processing.
+#
+{
+
+    my $closing_string = '';		# String required to close <p>
+
+#   Some tags are <p> fragile meaning that <p> inside of them
+#   does not work within TeX mode.  This is managed via the
+#   counter below:
+#
+
+    my $para_disabled = 0;
+
+sub disable_para {
+    $para_disabled++;
+}
+sub enable_para {
+    $para_disabled--;
+}
+
+
+#-- <p> tag (end tag optional)
+#optional attribute - align="center|left|right"
+sub start_p {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= &end_p();	# close off prior para if in progress.
+	$currentstring .= $token->[4];
+	if (! ($currentstring =~ /\//)) {
+	    $closing_string = '</p>'; # Deal correctly with <p /> e.g.
 	}
-#-- <small> tag
-        sub start_small {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '{\footnotesize ';
-	    } elsif ($target eq 'latexsource') {
-		$currentstring .= '{\footnotesize ';
-	    } 
-           return $currentstring;
-	}
-        sub end_small {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-	        $currentstring .= '}';
-            } elsif ($target eq 'latexsource') {
-	        $currentstring .= '}';
-            }
-           return $currentstring;
+    } elsif ($target eq 'tex' && !$para_disabled) {
+
+	$currentstring .= &end_p();	# close off prior para if in progress.
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if (!defined $align) {
+          # check inline CSS
+          $align = &get_css_property('text-align',$parstack,$safeeval);
+        }
+	if ($align eq 'center') {
+	    $currentstring .='\begin{center}\par ';
+	    $closing_string = '\end{center}';
+	    if (&is_inside_of($tagstack, "table")) {
+		$currentstring = &center_correction().$currentstring;
+	    }
+	} elsif ($align eq 'right') {
+	    $currentstring.="\n".'\begin{flushright}';
+#	    $currentstring.='\makebox['.$env{'form.textwidth'}.']{\hfill\llap{';
+	    $closing_string= '\end{flushright}'."\n";
+	} elsif ($align eq 'left') {
+	    $currentstring.= "\n".'\begin{flushleft}';
+#	    $currentstring.='\noindent\makebox['.$env{'form.textwidth'}.']{{';
+	    $closing_string = '\end{flushleft}'."\n";
+	} else {
+            $currentstring.='\par ';
+	    if (&is_inside_of($tagstack, 'table')) {
+		$closing_string = '\vskip 0pt'; # Seems to be consistent with <p> in tables.
+	    } else {
+		$closing_string = '\strut\\\\\strut ';
+	    }
+        }
+
+    }
+    return $currentstring;
+}
+#
+#  End paragraph processing just requires that we output the
+#  closing string that was saved and blank it.
+sub end_p {
+    #  Note only 'tex' mode uses disable_para and enable_para
+    #  so we don't need to know the target in the check below:
+
+    if (!$para_disabled) {
+	my $current_string = $closing_string;
+	$closing_string = '';	# Not in a para anymore.
+	return $current_string;
+    } else {
+	return '';
+    }
+
+}
+}
+#-- <br> tag (end tag forbidden)
+sub start_br {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	my @tempo=@$tagstack;
+	my $signal=0;
+	#  Not going to factor this to is_inside_of since that would require
+        #  multiple stack traversals.
+	#
+	for (my $i=$#tempo;$i>=0;$i--) {
+	    if (($tempo[$i] eq 'b') || ($tempo[$i] eq 'strong') ||
+                ($tempo[$i] eq 'ol') || ($tempo[$i] eq 'ul'))  {
+		$signal=1;
+	    }
+	    if (($tempo[$i] eq 'td') || ($tempo[$i] eq 'th')) {
+		$signal = 1;
+	    }
 	}
-#-- <basefont> tag
-      sub start_basefont {
-	my ($target,$token) = @_;
-	my $currentstring = '';
-	if ($target eq 'web') {
-	  $currentstring = $token->[4];     
-	} 
-	return $currentstring;
-      }
-      sub end_basefont {
-	my ($target,$token) = @_;
-	my $currentstring = '';
-	if ($target eq 'web') {
-	  $currentstring = $token->[4];     
-	} 
-	return $currentstring;
-      }
-#-- <font> tag
-         sub start_font {
-	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	      my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
-	      if ($face=~/symbol/i) {$Apache::lonxml::prevent_entity_encode++;}
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_font {
-	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-            my $currentstring = '';
-            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];    
-            } 
-	   return $currentstring;
-	} 
-#-- <strike> tag
-        sub start_strike {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '\underline{';
-	    } 
-           return $currentstring;
-	}
-        sub end_strike {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-	        $currentstring .= '}';
-            }
-           return $currentstring;
+	if ($signal != 1) {
+	    $currentstring .= '\strut \\\\ \strut ';
 	}
-#-- <s> tag
-        sub start_s {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '\underline{';
-	    } 
-           return $currentstring;
-	}
-        sub end_s {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-	        $currentstring .= '}';
-            }
-           return $currentstring;
+
+    }
+    return $currentstring;
+}
+
+sub end_br {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <big> tag (end tag required)
+sub start_big {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '{\large ';
+    }
+    return $currentstring;
+}
+
+sub end_big {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}';
+    }
+    return $currentstring;
+}
+
+#-- <small> tag (end tag required)
+sub start_small {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '{\footnotesize ';
+    }
+    return $currentstring;
+}
+
+sub end_small {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}';
+    }
+    return $currentstring;
+}
+
+#-- <basefont> tag (end tag forbidden)
+sub start_basefont {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
+	if (defined $basesize) {
+	    $currentstring = '{\\'.$basesize.' ';
 	}
-#-- <sub> tag
-        sub start_sub {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= "\$_{ ";
-	    } 
-           return $currentstring;
-	}
-        sub end_sub {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-	        $currentstring .= " }\$";
-            }
-           return $currentstring;
+    }
+    return $currentstring;
+}
+
+sub end_basefont {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	my $basesize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
+	if (defined $basesize) {
+	    $currentstring = '}';
 	}
-#-- <sup> tag
-        sub start_sup {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= "\$^{ ";
-	    } 
-           return $currentstring;
-	}
-        sub end_sup {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-	        $currentstring .= " }\$";
-            }
-           return $currentstring;
+    }
+    return $currentstring;
+}
+
+#-- <font> tag (end tag required)
+sub start_font {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	my $face=&Apache::lonxml::get_param('face',$parstack,$safeeval);
+	$currentstring = $token->[4];
+    }  elsif ($target eq 'tex') {
+	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
+	if (defined $fontsize) {
+	    $currentstring = '{\\'.$fontsize.' ';
 	}
-#-- <hr> tag
-        sub start_hr {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '\vskip 0 mm \noindent\makebox[\textwidth/2 ][b]{\hrulefill}\vskip 0 mm ';
-	    } 
-           return $currentstring;
-	}
-        sub end_hr {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-	    } 
-           return $currentstring;
-	}
-#-- <div> tag
-        sub start_div {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } 
-           return $currentstring;
-	}
-        sub end_div {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } 
-           return $currentstring;
-	}
-#-- <a> tag
-        sub start_a {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-	    }
-           return $currentstring;
-	}
-        sub end_a {
-	    my ($target,$token,$tagstack,$stackref) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-                my  $tempor_var = $stackref->[$#$stackref];
-		if (index($tempor_var,'name') != -1 ) {
-		    $tempor_var =~ s/name=([^,]*),/$1/g;
-	        } elsif (index($tempor_var,'href') != -1 ) {
-		    $tempor_var =~ s/href=([^,]*),/$1/g;
-	        $currentstring .= " \\ref{$tempor_var}";
-	        }
-            }
-           return $currentstring;
+    }
+    return $currentstring;
+}
+
+sub end_font {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }  elsif ($target eq 'tex') {
+	my $fontsize=&Apache::lonxml::get_param('TeXsize',$parstack,$safeeval);
+	if (defined $fontsize) {
+	    $currentstring = '}';
+	}
+    }
+    return $currentstring;
+}
+
+#-- <strike> tag (end tag required)
+sub start_strike {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	&Apache::lonxml::startredirection();
+    }
+    return $currentstring;
+}
+
+sub end_strike {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring=&Apache::lonxml::endredirection();
+	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
+	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
+	$currentstring=~s/(\S)\s*$/$1\}/;
+    }
+    return $currentstring;
+}
+
+#-- <s> tag (end tag required)
+sub start_s {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	&Apache::lonxml::startredirection();
+    }
+    return $currentstring;
+}
+
+sub end_s {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring=&Apache::lonxml::endredirection();
+	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
+	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
+	$currentstring=~s/(\S)\s*$/$1\}/;	
+    }
+    return $currentstring;
+}
+
+#-- <sub> tag (end tag required)
+sub start_sub {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\raisebox{-\smallskipamount}{\scriptsize{';
+    }
+    return $currentstring;
+}
+
+sub end_sub {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}}';
+    }
+    return $currentstring;
+}
+
+#-- <sup> tag (end tag required)
+sub start_sup {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\raisebox{\smallskipamount}{\scriptsize{';
+    }
+    return $currentstring;
+}
+
+sub end_sup {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '}}';
+    }
+    return $currentstring;
+}
+
+#-- <hr> tag (end tag forbidden)
+sub start_hr {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# End enclosing para.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+
+	# <hr /> can't be inside of <sup><sub> thank you LaTeX.
+	#
+	my $restart_sub = 0;
+	my $restart_sup = 0;
+
+	# Since <sub> and <sup> are simple tags it's ok to turn off/on
+	# using the start_ stop_ functions.. those tags only care about
+	# $target.
+
+	if (&is_inside_of($tagstack, "sub")) {
+	    $restart_sub = 1;
+	    $currentstring .= &end_sub($target, $token, $tagstack,
+				       $parstack, $parser, $safeeval);
+	}
+	if (&is_inside_of($tagstack, "sup")) {
+	    $restart_sup = 1;
+	    $currentstring .= &end_sup($target, $token, $tagstack,
+				       $parstack, $parser, $safeeval);
+	}	
+
+	my $LaTeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
+	if (defined $LaTeXwidth) {
+	    if ($LaTeXwidth=~/^%/) {
+		substr($LaTeXwidth,0,1)='';
+		$LaTeXwidth=($LaTeXwidth/100).'\textwidth';
+	    }
+	} else {
+	    $LaTeXwidth ='0.9\textwidth';
 	}
-#-- <li> tag
-        sub start_li {
-	    my ($target,$token,$tagstack,$stackref) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-                my  $tempor_var = $stackref->[$#$stackref];
-                if (index($tempor_var,'circle') != -1 ) {
-	          $currentstring .= " \\item[o] ";
-	        } elsif (index($tempor_var,'square') != -1 ) {
-	               $currentstring .= " \\item[$\Box$] ";
-	        } elsif ($tempor_var ne '') { 
-		       $_ = $tempor_var;
-                       m/my\s*([^=]*)=/;
-		       $currentstring .= " \\item[$1] ";
-		} else {
-		    $currentstring .= " \\item ";
-	        }  
-	    } 
-	   return $currentstring;
-	}
-        sub end_li {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];     
-	    } 
-	   return $currentstring;
-	}
-#-- <u> tag
-        sub start_u {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '\underline{';
-	    } 
-           return $currentstring;
-	}
-        sub end_u {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-	        $currentstring .= '}';
+	my ($pre,$post);
+	my $align=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if (($align eq 'center') || (not defined $align)) {
+	    $pre=''; $post='';
+	} elsif ($align eq 'left') {
+	    $pre='\rlap{'; $post='} \hfill';
+	} elsif ($align eq 'right') {
+	    $pre=' \hfill \llap{'; $post='}';
+	}
+	$currentstring .= ' \vskip 0 mm \noindent\makebox['.$LaTeXwidth.']{'.$pre.'\makebox['.
+                                    $LaTeXwidth.'][b]{\hrulefill}'.$post.'}\vskip 0 mm ';
+	# Turn stuff back on that we can't be inside of.
+
+	if ($restart_sub) {
+	    $currentstring .= &start_sub($target, $token, $tagstack,
+					$parstack, $parser, $safeeval);
+	}
+	if ($restart_sup) {
+	    $currentstring .= &start_sup($target, $token, $tagstack,
+					 $parstack, $parser, $safeeval);
+	}	
+    }
+    return $currentstring;
+}
+
+sub end_hr {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <div> tag (end tag required)
+{
+
+#  Since div can be nested, the stack below is used
+#  in 'tex' mode to store the ending strings
+#  for the div stack.
+
+    my @div_end_stack;
+
+sub start_div {
+    my ($target,$token, $tagstack, $parstack, $parser, $safeeval) = @_;
+    my $currentstring = &end_p();	# Close enclosing para.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    }
+    if ($target eq 'tex') {
+	# 4 possible alignments: left, right, center, and -missing-.
+        # If inside a table row, we must let the table logic
+	# do the alignment, however.
+	#
+
+	my $endstring = '';
+
+	my $align = lc(&Apache::lonxml::get_param('align', $parstack,
+						  $safeeval, undef, 1));
+	if ($align eq 'center') {
+	    $currentstring .= '\begin{center}';
+	    $endstring      = '\end{center}';
+	    if (&is_inside_of($tagstack, "table")) {
+		$currentstring = &center_correction().$currentstring;
+		$endstring    .= &center_end_correction();
+	    }
+	}
+	elsif ($align eq 'right') {
+	    $currentstring .= '\begin{flushright}';
+	    $endstring     .= '\end{flushright}';
+	} elsif ($align eq 'left') {
+	    $currentstring .= '\begin{flushleft}';
+	    $endstring     = '\end{flushleft}';
+	} else {
+	
+	}
+	$currentstring .= "\n";   # For human readability.
+	$endstring       = "\n$endstring\n"; # For human readability
+	push(@div_end_stack, $endstring);
+    }
+    return $currentstring;
+}
+
+sub end_div {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    }
+    if ($target eq 'tex') {
+	my $endstring = pop @div_end_stack;
+	$currentstring .= $endstring;
+    }
+    return $currentstring;
+}
+}
+
+#-- <a> tag (end tag required)
+sub start_a {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
+					    undef,1);
+	$currentstring=&Apache::lonenc::encrypt_ref($token,{'href'=>$href});
+        if ($href =~ /\S/) {
+            if ($href !~ m{^https?://}) {
+                my $url=&Apache::lonnet::hreflocation('',$env{'request.filename'});
+                my $linkurl;
+                if ($href =~ m{^/uploaded/}) {
+                    $linkurl = $href;
+                } elsif ($href =~ m{^[^/]}) {
+                    my $path = $url;
+                    $path  =~ s{[^/]*$}{};
+                    $linkurl = $path.$href;
+                }
+                if ($linkurl =~ m{^/uploaded/}) {
+                    if (!&Apache::lonnet::allowed('bre',$linkurl)) {
+                        if (&Apache::lonnet::is_on_map($url)) {
+                            &Apache::lonxml::extlink($linkurl);
+                        } elsif ($env{'request.course.id'}) {
+                            my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+                            my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+                            if ($linkurl =~ m{^([^/]|/uploaded/$cdom/$cnum/(docs|supplemental)/)}) {
+                                my $cleanhref = &clean_docs_httpref($linkurl,$url,$cdom,$cnum);
+                                if ($cleanhref) {
+                                    &Apache::lonxml::extlink($cleanhref);
+                                }
+                            }
+                        }
+                    }
+                }
             }
-           return $currentstring;
+        }
+    }
+    return $currentstring;
+}
+
+sub end_a {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    }
+    if ($target eq 'tex') {
+	my $href =
+	    &Apache::lonxml::get_param('href',$parstack,$safeeval,undef,1);
+	my $name =
+	    &Apache::lonxml::get_param('name',$parstack,$safeeval,undef,1);
+        my $uriprint =
+            &Apache::lonxml::get_param('uriprint',$parstack,$safeeval,undef,1);
+        my $anchorprint =
+            &Apache::lonxml::get_param('anchorprint',$parstack,$safeeval,undef,1);
+	if (($href =~ /\S/) && ($uriprint=~/^on|uriprint|yes|1$/i)) {
+	    $href =~ s/([^\\])%/$1\\\%/g;
+	    # Substitute special symbols... and allow line breaks at each /
+	    #
+	    $href = &Apache::lonxml::latex_special_symbols($href);
+	    $href =~ s/\//\/\\-/g;              # Map / to /\- to allow hyphenation.
+	    $currentstring .= ' ({\tt URI:'.$href.'})';
+	} elsif (($name =~ /\S/) && ($anchorprint=~/^on|anchorprint|yes|1$/i)) {
+	    $currentstring .= ' ({\tt Anchor:'.&Apache::lonxml::latex_special_symbols($name).'})';
+	} else {
+	    $currentstring.='';
+	}	
+    }
+    return $currentstring;
+}
+
+#-- <li> tag (end tag optional)
+sub start_li {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
+	my $value=&Apache::lonxml::get_param('value',$parstack,$safeeval,undef,0);
+	#FIXME need to support types i and I
+	if ($type=~/disc/) {
+	    $currentstring .= ' \item[$\bullet$] ';
+	} elsif ($type=~/circle/) {
+	    $currentstring .= ' \item[$\circ$] ';
+	} elsif ($type=~/square/) {
+	    $currentstring .= ' \item[$\diamond$] ';
+	} elsif ($type eq '1') {
+	    $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 {
+	    $currentstring .= ' \item ';
 	}
-#-- <ul> tag
-        sub start_ul {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '\begin{itemize}';  
-	    } 
-	   return $currentstring;
-	}
-        sub end_ul {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '\end{itemize}';  
-	    } 
-	   return $currentstring;
-	}
-#-- <menu> tag
-        sub start_menu {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{itemize} ";  
-	    } 
-	   return $currentstring;
-	}
-        sub end_menu {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{itemize}";  
-	    } 
-	   return $currentstring;
-	}
-#-- <dir> tag
-        sub start_dir {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{itemize} ";  
-	    } 
-	   return $currentstring;
-	}
-        sub end_dir {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{itemize}";  
-	    } 
-	   return $currentstring;
-	}
-#-- <ol> tag
-        sub start_ol {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '\begin{enumerate}';  
-	    } 
-	   return $currentstring;
-	}
-        sub end_ol {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '\end{enumerate}';  
-	    } 
-	   return $currentstring;
-	}
-#-- <dl> tag
-        sub start_dl {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '\begin{description}';  
-	    } 
-	   return $currentstring;
-	}
-        sub end_dl {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '\end{description}';  
-	    } 
-	   return $currentstring;
-	}
-#-- <dt> tag
-        sub start_dt {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = '\item[';  
-	    } 
-	   return $currentstring;
-	}
-        sub end_dt {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } elsif ($target eq 'tex') {
-              $currentstring = ']';  
-	    } 
-	   return $currentstring;
-	}
-#-- <dd> tag
-        sub start_dd {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_dd {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
+	$Apache::londefdef::list_index++;
+    }
+    return $currentstring;
+}
+
+sub end_li {
+    my ($target,$token) = @_;
+    my $currentstring = &end_p();	# In case there's a <p> in the <li>
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <u> tag (end tag required)
+sub start_u {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	&Apache::lonxml::startredirection();
+    }
+    return $currentstring;
+}
+
+sub end_u {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring=&Apache::lonxml::endredirection();
+	$currentstring=~s/(\S)(\s+)(\S)/$1\}$2\\underline\{$3/g;
+	$currentstring=~s/^\s*(\S)/\\underline\{$1/;
+	$currentstring=~s/(\S)\s*$/$1\}/;		
+    }
+    return $currentstring;
+}
+
+#-- <ul> tag (end tag required)
+sub start_ul {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# Close off enclosing list.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	my $TeXtype=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
+	$Apache::londefdef::list_index=0;
+	if ($TeXtype eq 'disc') {
+	    $currentstring .= '\renewcommand{\labelitemi}{$\bullet$}'.
+                              '\renewcommand{\labelitemii}{$\bullet$}'.
+                              '\renewcommand{\labelitemiii}{$\bullet$}'.
+                              '\renewcommand{\labelitemiv}{$\bullet$}';
+	} elsif ($TeXtype eq 'circle') {
+	    $currentstring .= '\renewcommand{\labelitemi}{$\circ$}'.
+                              '\renewcommand{\labelitemii}{$\circ$}'.
+                              '\renewcommand{\labelitemiii}{$\circ$}'.
+                              '\renewcommand{\labelitemiv}{$\circ$}';
+	} elsif ($TeXtype eq 'square') {
+	    $currentstring .= '\renewcommand{\labelitemi}{$\diamond$}'.
+                              '\renewcommand{\labelitemii}{$\diamond$}'.
+                              '\renewcommand{\labelitemiii}{$\diamond$}'.
+                              '\renewcommand{\labelitemiv}{$\diamond$}';
+	}
+	$currentstring .= '\strut \begin{itemize}';
+    }
+    return $currentstring;
+}
+
+sub end_ul {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring = '\end{itemize} \renewcommand{\labelitemi}{$\bullet$}'.
+                               '\renewcommand{\labelitemii}{$\bullet$}'.
+                               '\renewcommand{\labelitemiii}{$\bullet$}'.
+                               '\renewcommand{\labelitemiv}{$\bullet$}\strut ';
+    }
+    return $currentstring;
+}
+
+#-- <menu> tag (end tag required)
+sub start_menu {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring = " \\begin{itemize} ";
+    }
+    return $currentstring;
+}
+
+sub end_menu {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring = " \\end{itemize}";
+    }
+    return $currentstring;
+}
+
+#-- <dir> tag (end tag required)
+sub start_dir {
+    my ($target,$token) = @_;
+    my $currentstring = &end_p();	# In case there's a <p> prior to the list.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= " \\begin{itemize} ";
+    }
+    return $currentstring;
+}
+
+sub end_dir {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring = " \\end{itemize}";
+    }
+    return $currentstring;
+}
+
+#-- <ol> tag (end tag required)
+sub start_ol {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# In case there's a <p> prior to the list.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$Apache::londefdef::list_index=0;
+	my $type=&Apache::lonxml::get_param('type',$parstack,$safeeval,undef,0);
+	if ($type eq '1') {
+	    $currentstring .= '\renewcommand{\labelenumi}{\arabic{enumi}.}'.
+                              '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
+                              '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
+                              '\renewcommand{\labelenumiv}{\arabic{enumiv}.}';
+	} elsif ($type eq 'A') {
+	    $currentstring .= '\renewcommand{\labelenumi}{\Alph{enumi}.}'.
+                              '\renewcommand{\labelenumii}{\Alph{enumii}.}'.
+                              '\renewcommand{\labelenumiii}{\Alph{enumiii}.}'.
+                              '\renewcommand{\labelenumiv}{\Alph{enumiv}.}';
+	} elsif ($type eq 'a') {
+	    $currentstring .= '\renewcommand{\labelenumi}{\alph{enumi}.}'.
+                              '\renewcommand{\labelenumii}{\alph{enumii}.}'.
+                              '\renewcommand{\labelenumiii}{\alph{enumiii}.}'.
+                              '\renewcommand{\labelenumiv}{\alph{enumiv}.}';
+	} elsif ($type eq 'i') {
+	    $currentstring .= '\renewcommand{\labelenumi}{\roman{enumi}.}'.
+                              '\renewcommand{\labelenumii}{\roman{enumii}.}'.
+                              '\renewcommand{\labelenumiii}{\roman{enumiii}.}'.
+                              '\renewcommand{\labelenumiv}{\roman{enumiv}.}';
+	} elsif ($type eq 'I') {
+	    $currentstring .= '\renewcommand{\labelenumi}{\Roman{enumi}.}'.
+                              '\renewcommand{\labelenumii}{\Roman{enumii}.}'.
+                              '\renewcommand{\labelenumiii}{\Roman{enumiii}.}'.
+                              '\renewcommand{\labelenumiv}{\Roman{enumiv}.}';
+	}
+	$currentstring .= '\strut \begin{enumerate}';
+    }
+    return $currentstring;
+}
+
+sub end_ol {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring = '\end{enumerate}\renewcommand{\labelenumi}{\arabic{enumi}.}'.
+                                        '\renewcommand{\labelenumii}{\arabic{enumii}.}'.
+                                        '\renewcommand{\labelenumiii}{\arabic{enumiii}.}'.
+                                        '\renewcommand{\labelenumiv}{\arabic{enumiv}.}\strut ';
+    }
+    return $currentstring;
+}
+
+#-- <dl> tag (end tag required)
+sub start_dl {
+    my ($target,$token) = @_;
+    my $currentstring = &end_p();	# In case there's a <p> unclosed prior to the list.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$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;
+}
+
+sub end_dl {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	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;
+}
+
+#-- <dt> tag (end tag optional)
+sub start_dt {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring='';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	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;
+}
+
+sub end_dt {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	if ($Apache::londefdef::DT[-1]) {
+	    my $data=&item_cleanup();
+	    push(@{$Apache::londefdef::description[-1]},'\item['.$data.'] \strut \vskip 0mm');
+	    $Apache::londefdef::DT[-1]--;
 	}
-#-- <table> tag
+    }
+    return $currentstring;
+}
+
+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 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	if ($Apache::londefdef::DT[-1]) { &end_dt(@_); }
+	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;
+}
+
+sub end_dd {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }  elsif ($target eq 'tex') {
+	$Apache::londefdef::description[-1]->[-1].=
+	    &Apache::lonxml::endredirection().' \vskip 0mm ';
+	$Apache::londefdef::DD[-1]--;
+    }
+    return $currentstring;
+}
+
+#-- <table> tag (end tag required)
+#       <table> also ends any prior <p> that is not closed.
+#               but, unless I allow <p>'s to nest, that's the
+#               only way I could think of to allow <p> in
+#               <tr> <th> bodies
+#
+#list of supported attributes: border,width,TeXwidth,TeXtheme
+#                              align
 sub start_table {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $textwidth = '';
+    my $currentstring = &end_p();
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	&disable_para();	# Can't have paras in a table.
+
+	#  Get the parameters that we can do something about:
+
+	my $border = &Apache::lonxml::get_param('border', $parstack, $safeeval, undef, 0);
+	my $width  = &Apache::lonxml::get_param('TeXwidth', $parstack, $safeeval, undef, 0);
+	my $theme  = &Apache::lonxml::get_param('TeXtheme', $parstack, $safeeval, undef, 0);
+	my $align  = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef, 0);
+	my $cell_border = &Apache::lonxml::get_param('rules', $parstack, $safeeval, undef, 0);
+
+	# The only thing that needs any figuring out is the width.. and then only if it is
+	# a percent. If not it's assumed to be some valid TeX measurement unit e.g. 3.0cm
+	#
+
+	my $table = new Apache::lontable();
+	if ((defined $border) && ($border > 0)) {
+	#    &Apache::lonnet::logthis("Turning on table borders: $border");
+	    $table->table_border(1);
+	    if (!defined $cell_border) {
+		$table->cell_border(1); # Default for rules is all if rules not defined.
+	    }
+	}
+
+	if ((defined $cell_border)) {
+	    if ($cell_border eq 'all') {
+		$table->cell_border(1);
+	    } elsif ($cell_border eq 'rows') {
+		$table->cell_border(2);
+	    } elsif ($cell_border eq 'cols') {
+		$table->cell_border(3);
+	    } elsif($cell_border eq 'groups') {
+		$table->cell_border(4);
+	    } else {
+		$table->cell_border(0);
+	    }
+	}
+	if (defined $theme) {
+	    $table->theme($theme);
+	}
+	if (defined $align) {
+	    $table->alignment($align);
+	}
+
+	# Missing width is most of page width
+
+	if (!(defined $width)) {
+	    $width = '70%';
+	}
+
+	# If a percentage, need to calculate what this means in terms of
+	# page width:
+	
+	if ($width =~ /%$/) {
+	    my $textwidth = &recalc($env{'form.textwidth'});  # Page width in mm.
+	    $width =~ s/%//;
+	    $width = $width * $textwidth / 100.0;
+	    $width .= " mm";
+	    $table->width($width);
+	}
+
+	push(@Apache::londefdef::table, $table);
+        $currentstring.=' \keephidden{NEW TABLE ENTRY}';
+
+    }
+    return $currentstring;
+}
+
+sub end_table {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
     my $currentstring = '';
-    if ($target eq 'web') {
-	$currentstring = $token->[4];     
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	
+	
+	my $table = pop(@Apache::londefdef::table);
+	my $t     = $table->generate();
+	# &Apache::lonnet::logthis("Generating string");
+	$currentstring = $t->generate_string();
+	# &Apache::lonnet::logthis("Generated: $currentstring");
+	&enable_para();
+	
+    }
+    return $currentstring;
+}
+
+#-- <tr> tag (end tag optional)
+sub start_tr {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
     } elsif ($target eq 'tex') {
-	my $aa = {};
-	push @Apache::londefdef::table, $aa; 
-	$Apache::londefdef::table[-1]{'row_number'} = -1;
-	$Apache::londefdef::table[-1]{'output'} = ' \noindent \begin{tabular} ';
-	my $border = &Apache::lonxml::get_param('border',$parstack,$safeeval);
-	unless (defined $border) { $border = 0; }
-	if ($border) { 
-	    $Apache::londefdef::table[-1]{'hinc'} = '\hline '; 
-	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
-	    $Apache::londefdef::table[-1]{'vvinc'} = '|';
+
+	my $align = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef, 1);
+	$Apache::londefdef::table[-1]->start_row();
+	
+	if ($align ne '') {
+	    $Apache::londefdef::table[-1]->configure_row({default_halign => $align});
+	}
+
+	#---------------------------------------------------------------
+	# Old table code.
+	#---------------------------------------------------------------
+
+	if (0) {
+	$Apache::londefdef::table[-1]{'row_number'}++;
+	my $alignchar=&Apache::lonxml::get_param('align',$parstack,$safeeval,undef,1);
+	if ($alignchar ne '') {
+	    push @ {$Apache::londefdef::table[-1]{'rows'} },substr($alignchar,0,1);
 	} else {
-	    $Apache::londefdef::table[-1]{'hinc'} = ''; 
-	    $Apache::londefdef::table[-1]{'vinc'} = '&'; 
-	    $Apache::londefdef::table[-1]{'vvinc'} = '';
-	}
-	my $width;
-	foreach my $key (keys(%{$token->[2]})) {
-	    if ($key =~ /^width$/i) {
-		$width = &Apache::lonxml::get_param($key,$parstack,$safeeval);
-	    }
-	}
-	if (defined($width)) { $Apache::londefdef::table[-1]{'width'}=$width; }
+	    push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
+	}
+	push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
+	#
+	#  Need to save the number of table columns to preserve the max # columns.
+	#
+	$Apache::londefdef::table[-1]{'prior_columns'}   = $Apache::londefdef::table[-1]{'counter_columns'};
+	$Apache::londefdef::table[-1]{'counter_columns'} = -1;
+	push @ {$Apache::londefdef::table[-1]{'TeXlen'}}, [];
+	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;
 }
-        sub end_table {
-	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-		my $inmemory = '';
-		my $output = '';
-                #construct header of the table
-		my $header_of_table = '{'.$Apache::londefdef::table[-1]{'vvinc'};
-		my $in;
-		for ($in=0;$in<=$Apache::londefdef::table[-1]{'counter_columns'};$in++) {
-		    $header_of_table .= $Apache::londefdef::table[-1]{'columns'}[$in].$Apache::londefdef::table[-1]{'vvinc'};
-		}
-		$header_of_table .= '}';
-                #fill the table
-		for ($in=0;$in<=$Apache::londefdef::table[-1]{'row_number'};$in++) {
-		    $output .=  $Apache::londefdef::table[-1]{'rowdata'}[$in];
-		    chop $output;
-		    $output .= ' \\\\ ';
-		}
-                #define the length of the table cells
-		my @lengthforoutput = split(/,/,$Apache::londefdef::table[-1]{'lengthrow'}[0]);
-		my $how_many_columns = $#lengthforoutput + 1; #total number of columns in the table 
-		my $filled_columns = 0; #number of columns with information about width
-		my $available_space = ' ';
-		foreach my $tempo_length (@{ $Apache::londefdef::table[-1]{'lengthrow'} }) {
-		    my @length = split(/,/,$tempo_length);
-		    for (my $ico=0;$ico<=$#lengthforoutput;$ico++) {
-			$lengthforoutput[$ico] =~ m/(\d*\.?\d*)\s*(\w+)/;
-			my $old_value = $1;
-			my $old_unit = $2; 
-			if ($old_unit eq 'cm') { 
-			    $old_value = $old_value * 10;
-			} elsif ($old_unit eq 'in') { 
-			    $old_value = $old_value * 25.4;
-			} elsif ($old_unit eq 'pt') {
-			    $old_value = $old_value * 25.4/72.27;
-			} elsif ($old_unit eq 'pc') {
-			    $old_value = $old_value * 25.4/6.022;
-			}
-			$old_unit = 'mm';
- 			$length[$ico] =~ m/(\d*\.?\d*)\s*(\w+)/;
-			my $new_value = $1;
-			my $new_unit = $2;
-			if ($new_unit eq 'cm') { 
-			    $new_value = $new_value * 10;
-			} elsif ($old_unit eq 'in') { 
-			    $new_value = $new_value * 25.4;
-			} elsif ($old_unit eq 'pt') {
-			    $new_value = $new_value * 25.4/72.27;
-			} elsif ($old_unit eq 'pc') {
-			    $new_value = $new_value * 25.4/6.022;
-			}
-			$new_unit = 'mm';
-			if ($old_value < $new_value) {
-			    $lengthforoutput[$ico] = $new_value.' mm';
-			} else {
-			    $lengthforoutput[$ico] = $old_value.' mm';
-			}		 
-		    }
-		}
-		for (my $ico=0;$ico<=$#lengthforoutput;$ico++) {
-		    if (not $lengthforoutput[$ico]=~m/^\s*0\s*\w*\s*$/) {
-			$filled_columns++;
-			$available_space = $available_space.' - '.$lengthforoutput[$ico];
+
+sub end_tr {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# Close any pending <p> in the row.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+
+	# In case the user is missing a </td> or </th> tag:
+
+	if ($Apache::londefdef::TD_redirection) {
+	    &end_td_tex($parstack,$parser,$safeeval);
+	}
+	$Apache::londefdef::table[-1]->end_row();
+
+	#-----------------------------------------------
+	# Old table code
+	#-----------------------------------------------
+
+	if (0) {
+	if ($Apache::londefdef::TD_redirection) {
+	    &end_td_tex($parstack,$parser,$safeeval);
+	}
+	# Counter columns must be the maximum number of columns seen
+	# in the table so far so:
+	if ($Apache::londefdef::table[-1]{'prior_columns'} > $Apache::londefdef::table[-1]{'counter_columns'}) {
+	    $Apache::londefdef::table[-1]{'counter_columns'} = $Apache::londefdef::table[-1]{'prior_columns'};
+	}
+    }
+
+	
+    }
+    return $currentstring;
+}
+
+#-- <td> tag (end tag optional)
+sub start_td {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	$Apache::londefdef::TD_redirection = 1;
+	&tag_check('tr','td',$tagstack,$parstack,$parser,$safeeval);
+    }
+    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 '';
+}
+
+#
+#  Factor out cell configuration hash generation:
+#
+
+sub cell_config_hash {
+    my ($align, $rowspan, $colspan, $width) = @_;
+    if ($rowspan ne '') {
+        $rowspan =~ s/^\s+|\s+$//g;
+    }
+    if ($colspan ne '') {
+        $colspan =~ s/^\s+|\s+$//g;
+    }
+    my %config;
+    if ($align ne '') {
+	$config{'halign'} = $align;
+    }
+    if (($colspan =~ /^\d+$/) && ($colspan > 0)) {
+	$config{'colspan'} = $colspan;
+    }
+    if (($rowspan =~ /^\d+$/) && ($rowspan > 0)) {
+	$config{'rowspan'} = $rowspan;
+    }
+    if ($width ne '') {
+	$config{'width'} = $width;
+    }
+    return \%config;
+}
+
+sub start_td_tex {
+    my ($parstack,$parser,$safeeval) = @_;
+
+    # At this stage, an empty cell is created with the
+    # appropriate rowspan/colspan and alignment
+    # attributes, but empty of text.  end_td_tex will
+    # fetch the contents from the recursive parse and
+    # fill the cell with them:
+    my $align   = &Apache::lonxml::get_param('align', $parstack, $safeeval);
+    my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval);
+    my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval);
+    my $width   = &Apache::lonxml::get_param('TeXwidth', $parstack, $safeeval);
+    my $config = &cell_config_hash($align, $rowspan, $colspan, $width);
+
+    my $table = $Apache::londefdef::table[-1];
+    $table->add_cell('', $config);
+
+
+    #------------------------------------------------
+    #  Old table code.
+    #------------------------------------------------
+
+    if (0) {
+
+    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 $text = &Apache::lonxml::endredirection();
+    my $table = $Apache::londefdef::table[-1];
+    $table->append_cell_text($text);
+
+    #-------------------------------------------------
+    # Old table code
+    #-------------------------------------------------
+
+    if (0) {
+    my ($parstack,$parser,$safeeval) = @_;
+    my $current_row    = $Apache::londefdef::table[-1]{'row_number'};
+    my $current_column = $Apache::londefdef::table[-1]{'counter_columns'};
+    my $data = &Apache::lonxml::endredirection();
+
+    #  The rowspan array of the table indicates which cells are part of a span.
+    #  n indicates the start of a span set of n rows.
+    #  ^ indicates a cell that continues a span set.
+    #  _ indicates the cell is at the bottom of a span set.
+    #  If this and subsequent cells are part of a rowspan, we must
+    #  push along the row until we find one that is not.
+
+    while ((defined $Apache::londefdef::table[-1]{'rowspan'}[$current_row] [$current_column])
+	   && ($Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column] =~ /[\^\_]/)) {
+	# Part of a span.
+	push @ {$Apache::londefdef::table[-1]{'content'}[-1]}, '';
+	$current_column++;
+    }
+    $Apache::londefdef::table[-1]{'counter_columns'} = $current_column;
+
+
+    # Get the column and row spans.
+    # Colspan can be done via \multicolumn if I can figure out the data structs.
+
+    my $colspan = &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 0);
+    if (!$colspan) {
+	$colspan = 1;
+    }
+
+    my $rowspan = &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 0);
+    if (!$rowspan) {
+	$rowspan = 1;
+    }
+
+
+
+    for (my $c = 0; $c < $colspan; $c++) {
+	$Apache::londefdef::table[-1]{'rowspan'}[$current_row][$current_column+$c] = $rowspan;
+	for (my $i = 1; $i < $rowspan; $i++) {
+	    $Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '^';
+	    if ($i == ($rowspan-1)) {
+		$Apache::londefdef::table[-1]{'rowspan'}[$current_row+$i][$current_column+$c] = '_';
+	    }
+	}
+    }
+
+    my $TeXwidth=&Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval,undef,0);
+    if (defined $TeXwidth) {		
+	for (my $c = 0; $c < $colspan; $c++) {
+	    push @ {$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/\[(\d+\.?\d*)\s*mm\]//;
+	    }
+	    for (my $c = 0; $c < $colspan; $c++) {
+		push @ {$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)*)//;
+	    }
+	    for (my $c = 0; $c < $colspan; $c++) {
+		push @ {$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;}
 		    }
 		}
-		my $temp_file;
-		my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.tbl";
-		if (-e $filename) {
-		    $temp_file = Apache::File->new($filename); 
-		    my @tbl_file_content = <$temp_file>;
-		    my ($one,$two,$three) = split(/,/,$tbl_file_content[0]);
-		        $how_many_columns+=$one-1;
-		        $filled_columns+=$two;
-		    if($three=~/\S/) {$available_space = $available_space.' - '.$three;}
-		} else {
-		    $temp_file = Apache::File->new('>>'.$filename); 
-		}		
-		print $temp_file "$how_many_columns,$filled_columns,$available_space\n";
-		$output =~ s/\\parbox{TOBECHANGEDONNUMBER}{}/\\parbox{1 mm}{}/g;
-		$output =~ s/\\parbox{TOBECHANGEDONNUMBER}/\\parbox{\$SpacePerColumn}/g;
-		my @tagar = @$tagstack;
-		my $signature = 1;
-		for (my $ico=0;$ico<$#tagar;$ico++) {
-		     if ($tagar[$ico] eq 'table') { $signature = 0; }
-		}
-		if ($signature) {
-		    my $NumberEmptyLength = $how_many_columns - $filled_columns;		
-		    my $SpacePerColumn = '(\textwidth '.$available_space.')/'.$NumberEmptyLength;
-		    $output =~ s/\$SpacePerColumn/$SpacePerColumn/g;
-		}	
-		$Apache::londefdef::table[-1]{'output'} .= $header_of_table.$output.$Apache::londefdef::table[-1]{'hinc'}.'\end{tabular}\vskip 0 mm ';
-		if ($#Apache::londefdef::table > 0) {
-		    $inmemory = $Apache::londefdef::table[-1]{'output'};
-		    pop @Apache::londefdef::table;
-		    $Apache::londefdef::table[-1]{'rowdata'}[$Apache::londefdef::table[-1]{'row_number'}] .= $inmemory
-		} else {
-		    $currentstring = $Apache::londefdef::table[-1]{'output'};
-		    $currentstring =~ s/\\\\\s+\\\\/\\\\/g; 
-		    pop @Apache::londefdef::table;
-		    if (-e $filename) {
-			unlink $filename;
+	    } 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;}
 		    }
-		}
 	    }
-	   return $currentstring;
+	    for (my $c = 0; $c < $colspan; $c++) {
+		push @ {$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'}] },$min_length;
+	    }
 	}
-#-- <tr> tag
-        sub start_tr {
-	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-		$Apache::londefdef::table[-1]{'row_number'}++;
-		my $alignchar = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval),0,1);
-		if ($alignchar ne '') {
-		    push @ {$Apache::londefdef::table[-1]{'rows'} }, $alignchar;
-		} else {
-		    push @ {$Apache::londefdef::table[-1]{'rows'} }, 'l';
-		}
-		push ( @{ $Apache::londefdef::table[-1]{'rowdata'} }, $Apache::londefdef::table[-1]{'hinc'});
-		$Apache::londefdef::table[-1]{'counter_columns'} = -1;
-		$Apache::londefdef::table[-1]{'length'} = ''; 
-	    } 
-	   return $currentstring;
-	}        
-        sub end_tr {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-		$currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-		push @{ $Apache::londefdef::table[-1]{'lengthrow'} },$Apache::londefdef::table[-1]{'length'};
-
-	    }
-	   return $currentstring;
-	}
-#-- <td> tag
-        sub start_td {
-	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-    } elsif ($target eq 'tex') {
-		my $what_to_push = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval),0,1);
-		if ($what_to_push eq '') {
-		    $what_to_push = substr($Apache::londefdef::table[-1]{'rows'}[0],0,1);;
+    }
+    # Substitute all of the tables nested in this cell in their appropriate places.
+
+
+    my $nested_count = $#{$Apache::londefdef::table[-1]{'include'}}; # This one is constant...
+    for (my $in=0; $in<=$nested_count; $in++) {
+	my $nested = shift @{$Apache::londefdef::table[-1]{'include'}};
+	$nested =~ s/\\end\{tabular\}\\strut\\\\/\\end\{tabular\}/;
+	# $data=~s/\\keephidden\{NEW TABLE ENTRY\}/$Apache::londefdef::table[-1]{'include'}[$in]/;
+	$data =~ s/\\keephidden\{NEW TABLE ENTRY\}/$nested/;
+
+    }
+    # Should be be killing off the 'include' elements as they're used up?
+
+    push @ {$Apache::londefdef::table[-1]{'content'}[-1] },$data;
+
+
+
+
+    #  the colspan array will indicate how many columns will be spanned by this
+    #  cell..this requires that counter_columns also be adjusted accordingly
+    #  so that the next bunch of text goes in the right cell.  Note that since
+    #  counter_columns is incremented in the start_td_tex, we adjust by colspan-1.
+    #
+
+    $Apache::londefdef::table[-1]{'counter_columns'} += $colspan -1;
+    for (my $i = 0; $i < ($colspan -1); $i++) {
+	push @ {$Apache::londefdef::table[-1]{'content'}[-1] },'';
+    }
+    for (my $r = 0; $r < $rowspan; $r++) {
+	$Apache::londefdef::table[-1]{'colspan'}[$current_row+$r][$current_column] = $colspan;
+	# Put empty text in spanned cols.
+	
+    }
+
+    }
+
+    return '';
+}
+
+sub end_td {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+        $Apache::londefdef::TD_redirection =0;
+	&end_td_tex($parstack,$parser,$safeeval);
+    }
+    return $currentstring;
+}
+
+#-- <th> tag (end tag optional)
+sub start_th {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	$Apache::londefdef::TD_redirection = 1;
+	&tagg_check('tr','th',$tagstack,$parstack,$parser,$safeeval);
+    }
+    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 $alignment = &Apache::lonxml::get_param('align', $parstack, $safeeval, undef,1);
+    my $rowspan  =  &Apache::lonxml::get_param('rowspan', $parstack, $safeeval, undef, 1);
+    my $colspan  =  &Apache::lonxml::get_param('colspan', $parstack, $safeeval, undef, 1);
+
+    my $config   = cell_config_hash($alignment, $rowspan, $colspan);
+    my $table    = $Apache::londefdef::table[-1];
+    $table->add_cell('\textbf{', $config);
+
+    #-------------------------------------------------------------------------------------
+    #
+    #  Old table code.
+    #
+    #--------------------------------------------------------------------------------------
+
+    if (0) {
+
+
+    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'}] },$1;
+    }
+    }
+
+    # Accept xml until the </th> tag.
+
+    &Apache::lonxml::startredirection();
+    return '';
+}
+
+sub end_th_tex {
+    my ($parstack,$parser,$safeeval) = @_;
+
+    my $table = $Apache::londefdef::table[-1];
+    my $text  = &Apache::lonxml::endredirection();
+    $table->append_cell_text($text.'}');
+
+    #-----------------------------------------------------------------------------
+    #  Old table code:
+    #-----------------------------------------------------------------------------
+
+    if (0) {
+    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;}
+		    }
 		}
-		    push @{ $Apache::londefdef::table[-1]{'columns'} }, $what_to_push;
-		$Apache::londefdef::table[-1]{'counter_columns'}++;
-		&Apache::lonxml::startredirection();
-;
-	    } 
-	   return $currentstring;
-	}        
-        sub end_td {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            my $tempolen = '';
-            if ($target eq 'web') {
-		$currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-		my $current_row = $Apache::londefdef::table[-1]{'row_number'};
-		my $data=&Apache::lonxml::endredirection();
-		if ($data=~m/width\s*=\s*(\d+\.?\d*\s*(mm|cm|in|pc|pt))/) {                 
-                    $Apache::londefdef::table[-1]{'length'} .= $1.',';
-		    $tempolen = $1;         
-		} else {
-		    if (length($data)<5) {
-			$Apache::londefdef::table[-1]{'length'} .= '0 mm,';
-			$tempolen = '5 mm';
-		    } else {
-			$Apache::londefdef::table[-1]{'length'} .= '0 mm,';
-			$tempolen = 'TOBECHANGEDONNUMBER';
+	    } 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;}
 		    }
-                }                                        
-		@{ $Apache::londefdef::table[-1]{'rowdata'} }[$current_row] .= '\parbox{'.$tempolen.'}{'.$data.'} '.$Apache::londefdef::table[-1]{'vinc'};
 	    }
-	   return $currentstring;
+	    push @ {$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'}] },$min_length;
 	}
-#-- <th> tag
-        sub start_th {
-	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-		my $what_to_push = substr(&Apache::lonxml::get_param('align',$parstack,$safeeval),0,1);
-		if ($what_to_push eq '') {
-		    $what_to_push = substr($Apache::londefdef::table[-1]{'rows'}[0],0,1);;
+    }
+	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 {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# Close any open <p> in the row.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+        $Apache::londefdef::TD_redirection =0;
+	&end_th_tex($parstack,$parser,$safeeval);
+    }
+    return $currentstring;
+}
+
+#-- <img> tag (end tag forbidden)
+#
+#  Render the <IMG> tag.
+#     <IMG> has the following attributes (in addition to the
+#     standard HTML ones:
+#      TeXwrap   - Governs how the tex target will try to wrap text around
+#                  horizontally aligned images.
+#      TeXwidth  - The width of the image when rendered for print (mm).
+#      TeXheight - The height of the image when rendered for print (mm)
+#         (Note there seems to also be support for this as a % of page size)
+#
+sub start_img {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style) = @_;
+    my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,
+					 undef,1);
+    if (! $src &&
+	($target eq 'web' || $target eq 'webgrade' || $target eq 'tex')
+	) {
+	my $inside = &Apache::lonxml::get_all_text("/img",$parser,$style);
+	return '';
+    }
+    unless ($src =~ m{^data\:image/gif;base64,}) {
+        &Apache::lonxml::extlink($src);
+    }
+    my $currentstring = '';
+    my $scaling = .3;
+
+   # Render unto browsers that which are the browser's...
+
+    if ($target eq 'web' || $target eq 'webgrade') {
+        my $enc = ('yes' eq
+                   lc(&Apache::lonxml::get_param('encrypturl',$parstack,
+                      $safeeval)));
+        unless ($src =~ m{^data\:image/gif;base64,}) {
+            $currentstring.=&Apache::lonenc::encrypt_ref($token,{'src'=>$src},
+                            $enc);
+        }
+
+    # and render unto TeX that which is LaTeX
+    } elsif ($target eq 'tex') {
+	#
+	#  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) {
+		$latex_rendering = "texwrap";
+	}
+	# using texwrap inside a table does not work. So, if after all of this,
+	# texwrap is on, we turn it off if we detect we're in a table:
+	#
+	if (($latex_rendering eq 'texwrap') && &is_inside_of($tagstack, "table")) {
+	    $latex_rendering = 'parpic';
+	}
+
+	# &Apache::lonxml::debug("LaTeX rendering = $latex_rendering image file: $src");
+
+	#if original bmp/gif/jpg/png/svg file exist do following:
+	my $origsrc=$src;
+	my ($path,$file) = &get_eps_image($src);
+	# &Apache::lonnet::logthis("Image source: $src result: $path $file");
+	$src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
+	&Apache::lonxml::debug("path = $path file = $file src = $src");
+	if (-e $src) {
+	    &Apache::lonxml::debug("$src exists");
+	    my ($height_param,$width_param)=
+		&image_size($origsrc,0.3,$parstack,$safeeval);
+	    my $size;
+	    if ($width_param)  { $size.='width='.$width_param.' mm,'; }
+	    if ($height_param) { $size.='height='.$height_param.' mm]'; }
+	    # Default size if not able to extract that (e.g. eps image).
+
+	    # &Apache::lonnet::logthis("Size = $size");
+
+	    $size='['.$size;
+	    $size=~s/,$/]/;
+	    $currentstring .= '\graphicspath{{'.$path.'}}'
+		.'\includegraphics'.$size.'{'.$file.'} ';
+	    my $closure;
+	    ($currentstring, $closure) = &align_latex_image($align,
+							    $latex_rendering,
+							    $currentstring,
+							    $width_param,
+							    $height_param);
+	    $currentstring .= $closure;
+
+	} else {
+	    &Apache::lonxml::debug("$src does not exist");
+	    #original image file doesn't exist so check the alt attribute
+	    my $alt =
+		&Apache::lonxml::get_param('alt',$parstack,$safeeval,undef,1);
+	    unless ($alt) {
+		$alt=&Apache::lonmeta::alttag($Apache::lonxml::pwd[-1],$src);
+	    }
+
+	    if ($alt) { $currentstring .= ' '.$alt.' '; }
+	}
+
+	# 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') {
+        my $only = join(',',&Apache::loncommon::filecategorytypes('Pictures'));
+	$currentstring .=&Apache::edit::tag_start($target,$token);
+	$currentstring .=&Apache::edit::text_arg('Image Url:','src',$token,70).
+                         &Apache::edit::browse_or_search('src',undef,'alt',$only,undef,1).
+                         '<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',
+						   ['', 'none','parbox', 'parpic', 'wrapfigure'], $token, 2);
+        my $alt=    &Apache::lonxml::get_param('alt',$parstack,$safeeval);
+        my $enc=    &Apache::lonxml::get_param('encrypturl',$parstack,$safeeval);
+
+	$currentstring .=&Apache::edit::select_arg('Encrypt URL:','encrypturl',
+						   ['no','yes'], $token, 2);
+        if (($alt=~/\S/) && (lc($enc) eq 'yes')) {
+           $currentstring.='<br /><span class="LC_warning">'.&mt('Warning: the description "[_1]" will be available, even for encrypted URL',$alt).'</span><br />';
+        }
+	$currentstring .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
+	my $src=    &Apache::lonxml::get_param('src',$parstack,$safeeval);
+	my $width=  &Apache::lonxml::get_param('width',$parstack,$safeeval);
+	my $height= &Apache::lonxml::get_param('height',$parstack,$safeeval);
+        my $element = &Apache::edit::get_element('src');
+        my $text;
+        if ($token->[2]{'src'}=~/\$/) {
+           $text = &mt('Variable image source');
+        } elsif ($token->[2]{'src'}=~/\S/) {
+	   $currentstring .= '<img src="'.$src.'" alt="'.$alt.'" ';
+	   if ($width) { $currentstring.=' width="'.$width.'" '; }
+	   if ($height) { $currentstring.=' height="'.$height.'" '; }
+	   $currentstring .= ' id="previewimg_'.$element.'" />';
+        } else {
+           $text = &mt("No image source specified");
+        }
+        $currentstring .= ' <span id="showimg_'.$element.'">'.$text.'</span>';
+    } elsif ($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,
+					     $safeeval,'src','alt','align',
+					     'TeXwidth','TeXheight', 'TeXwrap',
+					     'width','height','encrypturl');
+	my ($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;
 		}
-		    push @{ $Apache::londefdef::table[-1]{'columns'} }, $what_to_push;
-		$Apache::londefdef::table[-1]{'counter_columns'}++;
-		&Apache::lonxml::startredirection();
-;
-	    } 
-	   return $currentstring;
-	}        
-        sub end_th {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-		$currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-		my $current_row = $Apache::londefdef::table[-1]{'row_number'};
-		my $data=&Apache::lonxml::endredirection();
-		if ($data=~m/width\s*=\s*(\d+\.*\d*\s*(mm|cm))/) {                 
-                    $Apache::londefdef::table[-1]{'length'} .= $1.',';             
-		} else {
-		    $Apache::londefdef::table[-1]{'length'} .= '0 mm,'; 
-                }                                                           
-		@{ $Apache::londefdef::table[-1]{'rowdata'} }[$current_row] .= '\parbox{'.$1.'}{\textbf{'.$data.'}} '.$Apache::londefdef::table[-1]{'vinc'};
-	    }
-	   return $currentstring;
-	}
-#-- <img> tag
-        sub start_img {
-	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-            $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
-                                        $token->[2]->{'src'};
-            my $currentstring = '';
-	    my $width_param = '';
-	    my $height_param = '';
-	    my $scaling = .3;
-
-	    if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-		my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval);
-		if (not -e '/home/httpd/html'.$src) {
-		    #replicates image itself
-		    &Apache::lonnet::repcopy('/home/httpd/html'.$src);
-		    #replicates eps or ps 
-		    my $newsrc = $src;
-		    $newsrc =~ s/(.gif|.jpg)$/.eps/;
-		    if (not-e $newsrc && &Apache::lonnet::repcopy('/home/httpd/html'.$newsrc) ne 'OK') {
-			$newsrc =~ s/\.ps$/\.eps/;
-			&Apache::lonnet::repcopy('/home/httpd/html'.$newsrc);
-		    }
+		if ($oheight == $nheight || (!$nwidth && !$nheight)) {
+		    $token->[2]{'height'}=$iheight;$ctag=1;
 		}
-	      $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
-              #if original gif/jpg file exist do following:
-              if (-e $src) {          
-                  #defines the default size of image
-		  my $image = Image::Magick->new;
-		  my $current_figure = $image->Read($src);
-		  $width_param = $image->Get('width') * $scaling;;
-		  $height_param = $image->Get('height') * $scaling;;
-		  undef $image;
-		  #do we have any specified size of the picture?
-		  my $TeXwidth = &Apache::lonxml::get_param('TeXwidth',$parstack,$safeeval); 
-		  my $TeXheight = &Apache::lonxml::get_param('TeXheight',$parstack,$safeeval); 
-		  my $width = &Apache::lonxml::get_param('width',$parstack,$safeeval);
-		  if ($TeXwidth ne '') {  
-		      if ($TeXwidth=~/(\d+)\s*\%/) {
-			  $width_param = $1*$ENV{'form.textwidth'}/100;
-		      } else { 
-			  $width_param = $TeXwidth;
-		      }
-		  } elsif ($TeXheight ne '') {
-			  $width_param = $TeXheight/$height_param*$width_param;
-		  } elsif ($width ne '') {
-		      $width_param = $width*$scaling;      
-		  }
-		  my $file;
-		  my $path;	
-		  if ($src =~ m!(.*)/([^/]*)$!) {
-		      $file = $2; 
-		      $path = $1.'/'; 
-		  } 
-		  my $newsrc = $src;
-		  $newsrc =~ s/(\.gif|\.jpg)$/\.eps/i;
-		  $file=~s/(\.gif|\.jpg)$/\.eps/i;
-		  #where can we find the picture?
-		  if (-e $newsrc) {
-                      #eps counterpart for image exist 
-		      if ($path) {
-			  $currentstring .= '\noindent\graphicspath{{'.$path.'}}\fbox{\includegraphics[width='.$width_param.' mm]{'.$file.'}} ';
-		      }
-		  } else {
-                      #there is no eps counterpart for image - check for ps one
-		      $newsrc =~ s/\.eps$/\.ps/;
-		      if (-e $newsrc) {
-			  #ps counterpart for image exist 
-			  $file =~ s/\.eps$/\.ps/;
-			  if ($path) {
-			      $currentstring .= '\noindent\graphicspath{{'.$path.'}}\fbox{\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";
-			  $currentstring .= '\graphicspath{{/home/httpd/prtspool/}}\fbox{\includegraphics[width='.$width_param.' mm]{'.$file.'}} ';
-		      }
-		  }
-	      } else {
-		  #original image file doesn't exist so check the alt attribute
-		  my $alt = &Apache::lonxml::get_param('alt',$parstack,$safeeval);
-                  if ($alt) {
-		      $currentstring .= ' '.$alt.' ';
-		  } else {
-                     #<allow> tag will care about replication 
-		  }
-	      }
-	    }
-	    return $currentstring;
-	}
-        sub end_img {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];
-	    } elsif ($target eq 'tex') {
-              $currentstring = '';
-	    }
-	   return $currentstring;
-	}
-#-- <applet> tag
-
-        sub start_applet {
-	    my ($target,$token) = @_;
-              $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=   
-                                        $token->[2]->{'code'};
-              $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
-                                        $token->[2]->{'archive'};
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];
-	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{figure} ";
-	    } 
-	   return $currentstring;
+	    }
+	}
+	my ($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 $currentstring;
+}
+
+sub end_img {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring = '';
+    }
+    return $currentstring;
+}
+
+#-- <applet> tag (end tag required)
+sub start_applet {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+
+    my $code=&Apache::lonxml::get_param('code',$parstack,$safeeval,undef,1);
+    &Apache::lonxml::extlink($code);
+    my $archive=&Apache::lonxml::get_param('archive',$parstack,$safeeval,
+					   undef,1);
+    &Apache::lonxml::extlink($archive);
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+        $currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+        # Turn off some stuff we can't be inside thank you LaTeX
+
+	my $restart_sub = 0;
+	my $restart_sup = 0;
+
+	# Since <sub> and <sup> are simple tags it's ok to turn off/on
+	# using the start_ stop_ functions.. those tags only care about
+	# $target.
+
+	if (&is_inside_of($tagstack, "sub")) {
+	    $restart_sub = 1;
+	    $currentstring .= &end_sub($target, $token, $tagstack,
+				       $parstack, $parser, $safeeval);
+	}
+	if (&is_inside_of($tagstack, "sup")) {
+	    $restart_sup = 1;
+	    $currentstring .= &end_sup($target, $token, $tagstack,
+				       $parstack, $parser, $safeeval);
+	}
+
+	# Now process the applet; just replace it with its alt attribute.
+
+	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}';
+
+	# Turn stuff back on that we can't be inside of.
+
+	if ($restart_sub) {
+	    $currentstring .= &start_sub($target, $token, $tagstack,
+					$parstack, $parser, $safeeval);
+	}
+	if ($restart_sup) {
+	    $currentstring .= &start_sup($target, $token, $tagstack,
+					 $parstack, $parser, $safeeval);
 	}
+    }
+    return $currentstring;
+}
+
 sub end_applet {
     my ($target,$token) = @_;
     my $currentstring = '';
-    if ($target eq 'web') {
+    if ($target eq 'web' || $target eq 'webgrade') {
 	$currentstring = $token->[2];
     } elsif ($target eq 'tex') {
-	$currentstring = " \\end{figure}";
-    } 
+    }
     return $currentstring;
 }
 
-#-- <embed> tag
+#-- <embed> tag (end tag optional/required)
+sub start_embed {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $src=&Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
+    &Apache::lonxml::extlink($src);
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+    $currentstring=&Apache::lonenc::encrypt_ref($token,{'src'=>$src});
+    } elsif ($target eq 'tex') {
+    }
+    return $currentstring;
+}
 
-sub start_embed {    
+sub end_embed {
     my ($target,$token) = @_;
-    $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
-	$token->[2]->{'src'};
     my $currentstring = '';
-    if ($target eq 'web') {
-	$currentstring = $token->[4];
+    if ($target eq 'web' || $target eq 'webgrade') {
+        $currentstring = $token->[2];
     } elsif ($target eq 'tex') {
-	$currentstring = " \\begin{figure} ";  
-    } 
+        # ./.
+    }
     return $currentstring;
 }
-        sub end_embed {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{figure}";  
-	    } 
-	   return $currentstring;
-	}
-
-#-- <param> tag
-
-        sub start_param {
-	    my ($target,$token) = @_;
-	    if ($token->[2]->{'name'} eq 'cabbase') {
-                      $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
-					     $token->[2]->{'value'};
-            }   
-            $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=   
-                                        $token->[2]->{'src'};
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = " \\begin{figure} ";  
-	    } 
-	   return $currentstring;
-	}
-        sub end_param {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];     
-	    } elsif ($target eq 'tex') {
-              $currentstring = " \\end{figure}";  
-	    } 
-	   return $currentstring;
+
+#-- <param> tag (end tag forbidden)
+sub start_param {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval,
+                                          undef,1);
+    if ($name =~/^cabbase$/i) {
+	my $value=&Apache::lonxml::get_param('value',$parstack,
+					     $safeeval,undef,1);
+	&Apache::lonxml::extlink($value);
+    } elsif ($name eq 'flashvars') {
+        if (lc(&Apache::lonxml::get_param('type',$parstack,$safeeval,-2,1))
+            eq 'application/x-shockwave-flash') {
+            my $launcher =
+                &Apache::lonxml::get_param('data',$parstack,$safeeval,-2,1);
+            if ($launcher) {
+                &Apache::lonxml::extlink($launcher);
+            }
+            my $flashvars=&Apache::lonxml::get_param('value',$parstack,
+                                                     $safeeval,undef,1);
+            if ($flashvars ne '') {
+                foreach my $item (split(/\&/,$flashvars)) {
+                    my ($key,$value)=split(/=/,$item,2);
+                    if ($key eq 'content') {
+                        if ($value ne '') {
+                            my ($dir) = ($launcher =~ m{(.+/)[^/]+$});
+                            &Apache::lonxml::extlink($dir.$value);
+                        }
+                    } elsif ($key eq 'thumb') {
+                        if ($value ne '') {
+                            &Apache::lonxml::extlink($value);
+                        }
+                    }
+                }
+            }
+        }
+    }
+    my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
+    if ($src ne '') {
+        &Apache::lonxml::extlink($src);
+    }
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	my %toconvert;
+	if ($src) { $toconvert{'src'}= $src; }
+	if ($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') {
+    }
+    return $currentstring;
+}
+
+sub end_param {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+    }
+    return $currentstring;
+}
+
 #-- <allow> tag
-        sub start_allow {
-	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;	  
-            $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=   
-                                        $token->[2]->{'src'};
-	    my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval);
-	    if (not -e '/home/httpd/html'.$src) {
-            #replicates image itself
-		&Apache::lonnet::repcopy('/home/httpd/html'.$src);
-	        #replicates eps or ps 
-		my $newsrc = $src;
-		$newsrc =~ s/(.gif|.jpg)$/.eps/;
- 		if (not-e $newsrc && &Apache::lonnet::repcopy('/home/httpd/html'.$newsrc) ne 'OK') {
-		    $newsrc =~ s/\.ps$/\.eps/;
-		    &Apache::lonnet::repcopy('/home/httpd/html'.$newsrc);
-		}
-	    }
-	    return '';
-	}
-        sub end_allow {
-	   return '';
-	}
-#-- Frames
-	sub start_frameset {
-	  my ($target,$token) = @_;
-	  my $currentstring = '';
-	  if ($target eq 'web') { 
-	    if (!$Apache::lonxml::registered) {
-	      $currentstring.='<head>'.
-		  &Apache::lonxml::registerurl(undef,$target).'</head>';
-	    }
-	    $currentstring .= $token->[4];
-	  }
-	  return $currentstring;
-	}
-        sub end_frameset {
-	  my ($target,$token) = @_;
-	  my $currentstring = '';
-	  if ($target eq 'web') {
-	    $currentstring = $token->[2];
-	  }
-	  return $currentstring;
-	}
-#-- <pre>
-	sub start_pre {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[4];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '\begin{verbatim}';
-	    } 
-           return $currentstring;
-	}
-        sub end_pre {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= $token->[2];
-	    } elsif ($target eq 'tex') {
-		$currentstring .= '\end{verbatim}';
-	    }
-           return $currentstring;
-	}
+sub start_allow {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $src = &Apache::lonxml::get_param('src',$parstack,$safeeval,undef,1);
+    &Apache::lonxml::extlink($src);
+
+    if ($target eq 'tex') { &image_replication($src); }
+    my $result;
+    if ($target eq 'edit') {
+	$result .=&Apache::edit::tag_start($target,$token);
+	$result .=&Apache::edit::text_arg('File Spec:','src',$token,70);
+	$result .=&Apache::edit::end_row();#.&Apache::edit::start_spanning_row();
+    } elsif ($target eq 'modified') {
+	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+						     $safeeval,'src');
+	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
+    }
+    return $result;
+}
+
+sub end_allow {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    if ( $target eq 'edit') { return (&Apache::edit::end_table()); }
+    return '';
+}
+
+#-- Frames (end tag required)
+#-- <frameset>
+sub start_frameset {
+    my ($target,$token) = @_;
+    my $currentstring = '';	# Close any pending para.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring =
+	    &Apache::loncommon::start_page($Apache::londefdef::title,
+					   $Apache::londefdef::head,
+					   {'add_entries'    => $token->[2],
+#					    'no_title'       => 1,
+					    'force_register' => 1,
+					    'frameset'       => 1,});
+
+    }
+    return $currentstring;
+}
+
+sub end_frameset {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <xmp> (end tag required)
+sub start_xmp {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\begin{verbatim}';
+    }
+    return $currentstring;
+}
+
+sub end_xmp {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\end{verbatim}';
+    }
+    return $currentstring;
+}
+
+#-- <pre> (end tag required)
+sub start_pre {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# close off pending <p>
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\begin{verbatim}';
+	&Apache::lonxml::disable_LaTeX_substitutions();
+    }
+    return $currentstring;
+}
+
+sub end_pre {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring .= '\end{verbatim}';
+	&Apache::lonxml::enable_LaTeX_substitutions();
+    }
+    return $currentstring;
+}
+
 #-- <insert>
-	sub start_insert {
-	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-		my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval);
-	       $currentstring .= '<b>'.$display.'</b>';;
-	    }
-           return $currentstring;
-	}
-        sub end_insert {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= '';
-	    }
-           return $currentstring;
-	}
+sub start_insert {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
+	$currentstring .= '<b>'.$display.'</b>';;
+    }
+    return $currentstring;
+}
+
+sub end_insert {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= '';
+    }
+    return $currentstring;
+}
+
 #-- <externallink>
-	sub start_externallink {
-	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-		my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval);
-	       $currentstring .= '<b>'.$display.'</b>';;
-	    }
-           return $currentstring;
-	}
-        sub end_externallink {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-	       $currentstring .= '';
-	    }
-           return $currentstring;
-	}
-#-- <blankspace heigth="">
-        sub start_blankspace {
-	    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
-            my $currentstring = '';
-            if ($target eq 'tex') {
-		my $howmuch = &Apache::lonxml::get_param('heigth',$parstack,$safeeval);
-		$currentstring .= '\vskip '.$howmuch.' ';
-	    }
-           return $currentstring;
-	}
-        sub end_blankspace {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'tex') {
-	       $currentstring .= '';
-	    }
-           return $currentstring;
-	}
-#-- <abbr> tag
-      sub start_abbr {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_abbr {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <acronym> tag
-      sub start_acronym {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_acronym {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <area> tag
-      sub start_area {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_area {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <base> tag
-      sub start_base {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_base {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <bdo> tag
-      sub start_bdo {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_bdo {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <bgsound> tag
-      sub start_bgsound {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_bgsound {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <blink> tag
-      sub start_blink {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_blink {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <blockquote> tag
-      sub start_blockquote {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_blockquote {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <button> tag
-      sub start_button {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_button {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <caption> tag
-      sub start_caption {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_caption {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <col> tag
-      sub start_col {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_col {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <colgroup> tag
-      sub start_colgroup {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_colgroup {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <del> tag
-      sub start_del {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_del {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <fieldset> tag
-      sub start_fieldset {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_fieldset {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <frame> tag
-      sub start_frame {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_frame {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <iframe> tag
-      sub start_iframe {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_iframe {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <ins> tag
-      sub start_ins {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_ins {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <isindex> tag
-      sub start_isindex {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_isindex {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <keygen> tag
-      sub start_keygen {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_keygen {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
+sub start_externallink {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	my $display = &Apache::lonxml::get_param('display',$parstack,$safeeval,undef,1);
+	$currentstring .= '<b>'.$display.'</b>';;
+    }
+    return $currentstring;
+}
+
+sub end_externallink {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= '';
+    }
+    return $currentstring;
+}
+
+#-- <blankspace height="">
+sub start_blankspace {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = &end_p();	# closes off any unclosed <p>
+    if ($target eq 'tex') {
+	my $howmuch = &Apache::lonxml::get_param('height',$parstack,$safeeval,undef,1);
+	$currentstring .= '\vskip '.$howmuch.' ';
+    }
+    return $currentstring;
+}
+
+sub end_blankspace {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'tex') {
+	$currentstring .= '';
+    }
+    return $currentstring;
+}
+
+#-- <abbr> tag (end tag required)
+sub start_abbr {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_abbr {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <acronym> tag (end tag required)
+sub start_acronym {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_acronym {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <area> tag (end tag forbidden)
+sub start_area {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_area {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <base> tag (end tag forbidden)
+sub start_base {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_base {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <bdo> tag (end tag required)
+sub start_bdo {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_bdo {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <bgsound> tag (end tag optional)
+sub start_bgsound {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_bgsound {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <blink> tag (end tag required)
+sub start_blink {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_blink {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <blockquote> tag (end tag required)
+sub start_blockquote {
+    my ($target,$token) = @_;
+    my $currentstring = &end_p();	# Close any unclosed <p>
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    }
+    if ($target eq 'tex') {
+	$currentstring .= '\begin{quote}';
+    }
+    return $currentstring;
+}
+
+sub end_blockquote {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    if ($target eq 'tex') {
+	$currentstring = '\end{quote}';
+    }
+    return $currentstring;
+}
+
+#-- <button> tag (end tag required)
+sub start_button {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_button {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <caption> tag (end tag required)
+sub start_caption {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_caption {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <col> tag (end tag forbdden)
+sub start_col {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_col {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <colgroup tag (end tag optional)
+sub start_colgroup {
+    my ($target,$token,$tagstack, $parstack, $parser, $safeeval, $style) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    if ($target eq 'tex') {
+	# TODO: Ensure this tag is in a table:
+
+	# Fetch the attributes and build the hash for the
+	# call to define_colgroup.
+
+	my $span    = &Apache::lonxml::get_param('span',   $parstack, $safeeval);
+	my $halign  = &Apache::lonxml::get_param('halign', $parstack, $safeeval);
+
+	my %colgroup_params;
+	if ($span ne '') {
+	    $colgroup_params{'span'} = $span;
+	}
+	if ($halign ne '') {
+	    $colgroup_params{'halign'} = $halign;
+	}
+	
+	my $table = $Apache::londefdef::table[-1];
+	$table->define_colgroup(\%colgroup_params);
+
+    }
+    return $currentstring;
+}
+
+sub end_colgroup {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+
+#-- <del> tag (end tag required)
+sub start_del {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	&disable_para();
+	$currentstring .= '\st{';
+    }
+    return $currentstring;
+}
+
+sub end_del {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	&enable_para();
+	$currentstring = '}';
+    }
+    return $currentstring;
+}
+
+#-- <fieldset> tag (end tag required)
+sub start_fieldset {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_fieldset {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <frame> tag (end tag forbidden)
+sub start_frame {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_frame {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <iframe> tag (end tag required)
+sub start_iframe {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+        my ($src,$url,$query);
+        if ($token->[2]->{'src'}) {
+            $src = $token->[2]->{'src'};
+        } elsif ($token->[2]->{'SRC'}) {
+            $src = $token->[2]->{'SRC'};
+        }
+        if ($src) {
+            ($url,$query) = ($src =~ /^([^?]+)\??([^?]*)$/);
+            if ($query =~ /inhibitmenu=yes/) {
+                $currentstring = $token->[4];
+            } else {
+                my $inhibit;
+                if ($url =~ m{^[^/.].*\.x?html?$}) {
+                    $inhibit = 1;
+                } elsif ($url =~ m{^/(uploaded|res)/.*\.x?html?$}) {
+                    $inhibit = 1;
+                }
+                if ($inhibit) {
+                    $currentstring = '<iframe ';
+                    foreach my $attrib (@{$token->[3]}) {
+                        if (lc($attrib) eq 'src') {
+                            if ($query) {
+                                $query.='&amp;inhibitmenu=yes';
+                            } else {
+                                $query = 'inhibitmenu=yes';
+                            }
+                            $currentstring .= 'src="'.$url.'?'.$query.'" ';
+                        } else {
+                            $currentstring .= lc($attrib).'="'.$token->[2]->{$attrib}.'" ';
+                        }
+                    }
+                    $currentstring =~ s/\s+$//;
+                    if ($token->[4] =~ m{/>$}) {
+                        $currentstring .= ' />';
+                    } else {
+                        $currentstring .= '>';
+                    }
+                } else {
+                    $currentstring = $token->[4];
+                }
+            }
+            if (($url !~ m{^https?://}) && ($env{'request.course.id'})) {
+                my $docuri = &Apache::lonnet::hreflocation('',$env{'request.filename'});
+                my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+                my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+                if ($url =~ m{^([^/]|/uploaded/)}) {
+                    my $cleanhref = &clean_docs_httpref($url,$docuri,$cdom,$cnum);
+                    if ($cleanhref) {
+                        &Apache::lonxml::extlink($cleanhref);
+                    }
+                } elsif (($url =~ m{/res/$LONCAPA::domain_re/}) && ($docuri =~ m{^\Q/uploaded/$cdom/$cnum/docs/\E})) {
+                    if (!&Apache::lonnet::allowed('bre',$url)) {
+                        if (&Apache::lonnet::is_on_map($url)) {
+                            &Apache::lonxml::extlink($url);
+                        }
+                    }
+                }
+            }
+        } else {
+            $currentstring = $token->[4];
+        }
+    }
+    return $currentstring;
+}
+
+sub end_iframe {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <ins> tag (end tag required)
+sub start_ins {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_ins {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <isindex> tag (end tag forbidden)
+sub start_isindex {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_isindex {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <keygen> tag (end tag forbidden)
+sub start_keygen {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_keygen {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
 #-- <label> tag
-      sub start_label {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_label {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <layer> tag
-      sub start_layer {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_layer {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <legend> tag
-      sub start_legend {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_legend {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <link> tag
-      sub start_link {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_link {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <marquee> tag
-      sub start_marquee {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_marquee {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <malticol> tag
-      sub start_malticol {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_malticol {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <nobr> tag
-      sub start_nobr {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_nobr {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <noembed> tag
-      sub start_noembed {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_noembed {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <noframes> tag
-      sub start_noframes {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_noframes {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <nolayer> tag
-      sub start_nolayer {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_nolayer {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <noscript> tag
-      sub start_noscript {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_noscript {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <object> tag
-      sub start_object {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_object {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <optgroup> tag
-      sub start_optgroup {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_optgroup {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <samp> tag
-      sub start_samp {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_samp {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
+sub start_label {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_label {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <layer> tag (end tag required)
+sub start_layer {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_layer {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <legend> tag (end tag required)
+sub start_legend {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_legend {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <link> tag (end tag forbidden)
+sub start_link {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	my $href=&Apache::lonxml::get_param('href',$parstack,$safeeval,
+					    undef,1);
+	&Apache::lonxml::extlink($href);
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_link {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <marquee> tag (end tag optional)
+sub start_marquee {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_marquee {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <multicol> tag (end tag required)
+sub start_multicol {
+    my ($target,$token) = @_;
+    my $currentstring = &end_p();	# Close any pending <p>
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_multicol {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <nobr> tag (end tag required)
+sub start_nobr {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }  elsif ($target eq 'tex') {
+	$currentstring='\mbox{';
+    }
+    return $currentstring;
+}
+
+sub end_nobr {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }   elsif ($target eq 'tex') {
+	$currentstring='}';
+    }
+    return $currentstring;
+}
+
+#-- <noembed> tag (end tag required)
+sub start_noembed {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_noembed {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <noframes> tag (end tag required)
+sub start_noframes {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_noframes {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <nolayer> tag (end tag required)
+sub start_nolayer {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_nolayer {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <noscript> tag (end tag required)
+sub start_noscript {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_noscript {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <object> tag (end tag required)
+sub start_object {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_object {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <optgroup> tag (end tag required)
+sub start_optgroup {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_optgroup {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <samp> tag (end tag required)
+sub start_samp {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring='\texttt{';
+    }
+    return $currentstring;
+}
+
+sub end_samp {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring='}';
+    }
+    return $currentstring;
+}
+
 #-- <server> tag
-      sub start_server {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_server {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <spacer> tag
-      sub start_spacer {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_spacer {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <span> tag
-      sub start_span {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_span {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <tbody> tag
-      sub start_tbody {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_tbody {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <tfoot> tag
-      sub start_tfoot {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_tfoot {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <thead> tag
-      sub start_thead {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_thead {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
+sub start_server {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_server {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <spacer> tag (end tag forbidden)
+sub start_spacer {
+    my ($target,$token) = @_;
+    my $currentstring = &end_p();	# Close off any open <p> tag.
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring .= $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_spacer {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+my @span_end_stack; # for span tex target
+
+#-- <span> tag (end tag required)
+sub start_span {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+        my $endstring = '';
+        my $family = &get_css_property('font-family',$parstack,$safeeval);
+        if ($family eq 'monospace') {
+            $currentstring .= '\texttt{';
+            $endstring .= '}';
+        }
+        my $weight = &get_css_property('font-weight',$parstack,$safeeval);
+        if ($weight eq 'bold') {
+            $currentstring .= '\textbf{';
+            $endstring .= '}';
+        }
+        my $style = &get_css_property('font-style',$parstack,$safeeval);
+        if ($style eq 'italic') {
+            $currentstring .= '\textit{';
+            $endstring .= '}';
+        }
+        push(@span_end_stack, $endstring);
+    }
+    return $currentstring;
+}
+
+sub end_span {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+        my $endstring = pop @span_end_stack;
+        $currentstring .= $endstring;
+    }
+    return $currentstring;
+}
+
+#-- <tbody> tag (end tag optional)
+sub start_tbody {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    if ($target eq 'tex') {
+	# TODO: Ensure this tag is within a table:
+
+	my $table = $Apache::londefdef::table[-1];
+	$table->start_body();
+    }
+    return $currentstring;
+}
+
+sub end_tbody {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    if($target eq 'tex') {
+	# TODO: Ensure this tag is within a table:
+
+	my $table = $Apache::londefdef::table[-1];
+	$table->end_body();
+    }
+    return $currentstring;
+}
+
+#-- <tfoot> tag (end tag optional)
+sub start_tfoot {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    if ($target eq 'tex') {
+        # TODO: ensure this is within a table tag.
+	my $table = $Apache::londefdef::table[-1];
+	$table->start_foot();
+    }
+    return $currentstring;
+}
+
+sub end_tfoot {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    if ($target eq 'tex') {
+	#  TODO: Ensure this is in side a table
+	my $table = $Apache::londefdef::table[-1];
+	$table->end_foot();
+    }
+    return $currentstring;
+}
+
+#-- <thead> tag (end tag optional)
+sub start_thead {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    if ($target eq 'tex') {
+	# Assume we're in a table... TODO: Verify that and ignore tag if not.
+	my $table = $Apache::londefdef::table[-1];
+	$table->start_head();
+    }
+    return $currentstring;
+}
+
+sub end_thead {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    if ($target eq 'tex') {
+     	# TODO: Verify we are in a table and ignore tag if not.
+
+	my $table = $Apache::londefdef::table[-1];
+	$table->end_head();
+    }
+    return $currentstring;
+}
+
 #-- <var> tag
-      sub start_var {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_var {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
-	}
-#-- <wbr> tag
-      sub start_wbr {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[4];     
-	    } 
-	   return $currentstring;
-	}
-        sub end_wbr {
-	    my ($target,$token) = @_;
-            my $currentstring = '';
-            if ($target eq 'web') {
-              $currentstring = $token->[2];    
-            } 
-	   return $currentstring;
+sub start_var {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    } elsif ($target eq 'tex') {
+	$currentstring = '\textit{';
+    }
+    return $currentstring;
+}
+
+sub end_var {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    } elsif ($target eq 'tex') {
+	$currentstring = '}';
+    }
+    return $currentstring;
+}
+
+#-- <wbr> tag (end tag forbidden)
+sub start_wbr {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[4];
+    }
+    return $currentstring;
+}
+
+sub end_wbr {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = $token->[2];
+    }
+    return $currentstring;
+}
+
+#-- <hideweboutput> tag
+sub start_hideweboutput {
+    my ($target,$token) = @_;
+    if ($target eq 'web' || $target eq 'webgrade') {
+	&Apache::lonxml::startredirection();
+    }
+    return '';
+}
+
+sub end_hideweboutput {
+    my ($target,$token) = @_;
+    my $currentstring = '';
+    if ($target eq 'web' || $target eq 'webgrade') {
+	$currentstring = &Apache::lonxml::endredirection();
+    }
+    return '';
+}
+
+
+sub image_replication {
+    my $src = shift;
+    if (not -e $src) { &Apache::lonnet::repcopy($src); }
+    #replicates eps or ps
+    my $epssrc = my $pssrc = $src;
+    $epssrc =~ s/\.(gif|jpg|jpeg|png)$/.eps/i;
+    $pssrc  =~ s/\.(gif|jpg|jpeg|png)$/.ps/i;
+    if (not -e $epssrc && not -e $pssrc) {
+	my $result=&Apache::lonnet::repcopy($epssrc);
+	if ($result ne 'ok') { &Apache::lonnet::repcopy($pssrc); }
+    }
+    return '';
+}
+
+
+
+sub resize_image {
+    my ($height_param, $width_param, $scaling,
+	$parstack, $safeeval, $depth, $cis) = @_;
+
+    # First apply the scaling...
+
+    $height_param = $height_param * $scaling;
+    $width_param  = $width_param  * $scaling;
+
+    #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 = $TeXwidth;
+	}
+	if ($TeXheight) {
+	    $height_param = $TeXheight;
+	} elsif ($old_width_param) {
+	    $height_param=$TeXwidth/$old_width_param*$height_param;
+	}
+    } elsif ($TeXheight) {
+	if ($height_param) {
+	    $width_param  = $TeXheight/$height_param*$width_param;
+	}
+	$height_param = $TeXheight;
+    } elsif ($width) {
+	my $old_width_param=$width_param;
+	$width_param = $width*$scaling;
+	if ($old_width_param) {
+	    $height_param=$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'};
+	if ($old_width_param) {
+	    $height_param=$width_param/$old_width_param*$height_param;
+	}
+    }
+
+    return ($height_param, $width_param);
+}
+
+sub image_size {
+    my ($src,$scaling,$parstack,$safeeval,$depth,$cis)=@_;
+
+    #size of image from gif/jpg/jpeg/png
+    my $ressrc=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
+    if (-e $ressrc) {
+	$src = $ressrc;
+    }
+    my $image = Image::Magick->new;
+    my $current_figure = $image->Read($src);
+    my $width_param = $image->Get('width');
+    my $height_param = $image->Get('height');
+    &Apache::lonxml::debug("Image magick says: $src :  Height = $height_param width = $width_param");
+    undef($image);
+
+    ($height_param, $width_param) = &resize_image($height_param, $width_param,
+						  $scaling, $parstack, $safeeval,
+						  $depth, $cis);
+
+    return ($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 $orig_src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1], $src);
+
+    # In order to prevent the substitution of the alt text, we need to
+    # be sure the orig_src file is on system now so:
+
+    if (! -e $orig_src) {
+	&Apache::lonnet::repcopy($orig_src); # Failure is not completely fatal.
+    }
+    &Apache::lonxml::debug("get_eps_image: Original image: $orig_src");
+    my ($spath, $sname, $sext) = &fileparse($src, qr/\.(bmp|gif|png|jpg|jpeg|svg)/i);
+    $src=~s/\.(bmp|gif|png|jpg|jpeg|svg)$/\.eps/i;
+    $src=&Apache::lonnet::filelocation($Apache::lonxml::pwd[-1],$src);
+    &Apache::lonxml::debug("Filelocation gives: $src");
+    if (! -e $src) {
+	&Apache::lonxml::debug("$src does not exist");
+	if (&Apache::lonnet::repcopy($src) ne 'ok' ) {
+	    &Apache::lonxml::debug("Repcopy of $src failed (1)");
+	    #if replication failed try to find ps file
+	    $src=~s/\.eps$/\.ps/;
+	    &Apache::lonxml::debug("Now looking for $src");
+	    #if no ps file try to replicate it.
+	    my $didrepcopy = &Apache::lonnet::repcopy($src);
+	    &Apache::lonxml::debug("repcopy of $src ... $didrepcopy");
+	    if ( (not -e $src) ||
+		($didrepcopy ne 'ok')) {
+		&Apache::lonxml::debug("Failed to find or replicate $src");
+
+		#if replication failed try to produce eps file dynamically
+		$src=~s/\.ps$/\.eps/;
+		if (open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat")) {
+		    my $newsrc=$orig_src;
+		    $newsrc =~ s|(.*)/res/|/home/httpd/html/res/|;
+		    &Apache::lonxml::debug("queueing $newsrc for dynamic eps production.");
+		    print FILE ("$newsrc\n");
+		    close(FILE);
+                }
+		$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
+		$src=~s|/home/httpd/html/priv/[^/]+/([^/]*)/|/home/httpd/prtspool/$1/|;
+		if ($sext ne "") {	 # Put the ext. back in to uniquify.
+		    $src =~ s/\.eps$/$sext.eps/;
+		}
+
+	    }
+
 	}
+    } else {
+	# If the postscript file has spaces in its name,
+	# LaTeX will gratuitiously vomit.  Therefore
+	# queue such files for copy with " " replaced by "_".
+	# printout.pm will know them by their .ps  or .eps extensions.
+	my $newsrc = $orig_src;
+	$newsrc    =~  s|(.*)/res/|/home/httpd/html/res/|;
+	open(FILE,">>/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat");
+	print FILE "$src\n";
+	close FILE;
+	$src=~s|/home/httpd/html/res|/home/httpd/prtspool|;
+	$src=~s|/home/httpd/html/priv/[^/]+/([^/]*)/|/home/httpd/prtspool/$1/|;
+    }
+    my ($path,$file)=($src=~m|(.*)/([^/]*)$|);
+    $path =~ s/ /\_/g;
+    $file =~ s/ /\_/g;
+    &Apache::lonxml::debug("get_eps_image returning: $path / $file<BR />");
+    return ($path.'/',$file);
+}
+
+sub eps_generation {
+    my ($src,$file,$width_param) = @_;
+    my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.dat";
+    if (open(my $tmpfile,">>$filename")) {
+        print $tmpfile "$src\n";
+        close($tmpfile);
+    }
+    my $newsrc = $src;
+    $newsrc =~ s/(\.bmp|\.gif|\.jpg|\.jpeg)$/\.eps/i;
+    $newsrc=~s{/home/httpd/html/res}{};
+    $newsrc=~s{/home/httpd/html/priv/[^/]+/($LONCAPA::username_re)/}{/$1/};
+    $newsrc=~s{/\./}{/};
+    $newsrc=~s{/([^/]+)\.(ps|eps)}{/};
+    if ($newsrc=~m{/home/httpd/lonUsers/}) {
+	$newsrc=~s{/home/httpd/lonUsers}{};
+	$newsrc=~s{/($LONCAPA::domain_re)/./././}{/$1/};
+    }
+    if ($newsrc=~m{/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 {
+    my $argument = shift;
+    if (not $argument=~/(mm|cm|in|pc|pt)/) {return $argument.' mm';}
+    $argument=~/\s*(\d+\.?\d*)\s*(mm|cm|in|pc|pt)/;
+    my $value=$1;
+    my $units=$2;
+    if ($units eq 'cm') {
+	$value*=10;
+    } elsif ($units eq 'in') {
+	$value*=25.4;
+    } elsif ($units eq 'pc') {
+	$value*=(25.4*12/72.27);
+    } elsif ($units eq 'pt') {
+	$value*=(25.4/72.27);
+    }
+    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 $value;
+}
+
+
+sub align_latex_image {
+    my ($align, $latex_rendering, $image, $width, $height) = @_;
+    my $currentstring;        # The 1/2 wrapped image.
+    my $closure;              # The closure of the wrappage.
+
+    # if it's none just return it back
+    if ($latex_rendering eq 'none') {
+	return ($image,'');
+    }
+
+    #    If there's an alignment specification we need to honor it here.
+    #    For the horizontal alignments, we will also honor the
+    #    value of the latex specfication.  The default is parbox,
+    #    and that's used for illegal values too.
+    #
+    #    Even though we set a default alignment value, the user
+    #    could have given us an illegal value.  In that case we
+    #    just use the default alignment of bottom..
+    $currentstring = '';
+    if      ($align eq "top")    {
+	$currentstring .= '\raisebox{-'.$height.'mm}{'.$image;
+	$closure = '}';
+    } elsif (($align eq "center") || ($align eq "middle")) { # Being kind
+	my $offset = $height/2;
+	$currentstring .= '\raisebox{-'.$offset.'mm}{'.$image;
+	$closure       = '}';
+    } elsif ($align eq "left")   {
+	if ($latex_rendering eq "parpic") {
+	    $currentstring .= '\parpic[l]{'.$image;
+	    $closure       = '}';
+	} elsif ($latex_rendering eq "parbox") {
+	    $currentstring .= '\begin{minipage}[l]{'.$width.'mm}'
+		.$image;
+	    $closure = '\end{minipage}';
+	} elsif ($latex_rendering eq "wrapfigure"
+		 || $latex_rendering ne 'none') {  # wrapfig render
+	    $currentstring .=
+		'\begin{wrapfigure}{l}{'.$width.'mm}'
+		.'\scalebox{1.0}{'.$image;
+	    $closure = '}\end{wrapfigure}';
+	}
+    } elsif ($align eq "right")  {
+	if ($latex_rendering eq "parpic") {
+	    $currentstring .= '\parpic[r]{'.$image;
+	    $closure = '}';
+	} elsif ($latex_rendering eq "parbox") {
+	    $currentstring .=  '\begin{minipage}[r]{'.$width.'mm}'
+		.$image;
+	    $closure = '\end{minipage}';
+	} elsif ($latex_rendering eq "wrapfigure"
+		 || $latex_rendering ne 'none') {  # wrapfig render
+	    $currentstring .=
+		'\begin{wrapfigure}{r}{'.$width.'mm}'
+		.'\scalebox{1.0}{'.$image;
+	    $closure = '}\end{wrapfigure}';
+	}
+    } else {		# Bottom is also default.
+	# $currentstring = '\raisebox{'.$height.'mm}{'.$image.'}';
+	$currentstring .= "{$image";
+	$closure       = '}';
+    }
+    return ($currentstring, $closure);
+}
+
+
+sub is_inside_of {
+    my ($tagstack, $tag) = @_;
+    my @stack = @$tagstack;
+    for (my $i = ($#stack - 1); $i >= 0; $i--) {
+	if ($stack[$i] eq $tag) {
+	    return 1;
+	}
+    }
+    return 0;
+}
+
+
+#
+#   This sub provides the typical LaTeX prefix matter for tex output:
+#
+sub latex_header {
+    my ($mode) = @_;
+    my $currentstring = '';
+
+    $currentstring .=
+	"\n% &Apache::lonxml::londefdef \n" .
+	'\documentclass[letterpaper,twoside]{article}\raggedbottom';
+    if (($env{'form.latex_type'}=~'batchmode') ||
+	(!$env{'request.role.adv'}) ||
+	($mode eq 'batchmode')) {$currentstring .='\batchmode';}
+    $currentstring .= '\newcommand{\keephidden}[1]{}'.
+	'\renewcommand{\deg}{$^{\circ}$}'.
+	'\usepackage{multirow}'."\n".
+	'\usepackage{longtable}'."\n".
+	'\usepackage{textcomp}'."\n".
+	'\usepackage{makeidx}'."\n".
+	'\usepackage[dvips]{graphicx}'."\n".
+	'\usepackage{wrapfig}'."\n".
+	'\usepackage{picins}'."\n".
+	'\usepackage[T1]{fontenc}'."\n".
+	'\usepackage{lmodern}'."\n".
+	'\usepackage[postscript]{ucs}'."\n".
+	'\usepackage[utf8x]{inputenc}'."\n".
+	'\usepackage{pifont}'."\n".
+	'\usepackage{latexsym}'."\n".
+	'\usepackage{epsfig}'."\n".
+	'\usepackage{xtab}'."\n".
+	'\usepackage{tabularx}'."\n".
+	'\usepackage{booktabs}'."\n".
+	'\usepackage{array}'."\n".
+	'\usepackage{colortbl}'."\n".
+	'\usepackage{xcolor}'."\n".
+	'\usepackage{calc}'."\n".
+	'\usepackage{amsmath}'."\n".
+	'\usepackage{soul}'."\n".
+	'\usepackage{amssymb}'."\n".
+	'\usepackage{amsfonts}'."\n".
+	'\usepackage{amsthm}'."\n".
+	'\usepackage{amscd}'."\n".
+	'\usepackage{actuarialangle}'."\n";
+    if($env{'form.pdfFormFields'} eq 'yes') {
+	$currentstring .= '\usepackage{hyperref}'.
+	    '\usepackage{eforms}'.
+	    '\usepackage{tabularx}';
+    }
+
+        $currentstring .= '\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}}';
+    $currentstring .= '\begin{document}';
+
+    return $currentstring;
+
+}
+
+sub clean_docs_httpref {
+    my ($href,$docuri,$cdom,$cnum) = @_;
+    if ($docuri eq '') {
+        $docuri = &Apache::lonnet::hreflocation('',$env{'request.filename'});
+    }
+    if ($cdom eq '') {
+        $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+    }
+    if ($cnum eq '') {
+        $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+    }
+    my $cleanhref;
+    if ($docuri =~ m{^(\Q/uploaded/$cdom/$cnum/\E(?:docs|supplemental)/)(.+/)[^/]+$}) {
+        my $prefix = $1;
+        my $relpath = $2;
+        my ($hrefpath,$fname);
+        if ($href =~ m{^/}) {
+            if ($href =~ m{^\Q$prefix\E(.+/)([^/]+)$}) {
+                $hrefpath = $1;
+                $fname = $2;
+            } else {
+                return $cleanhref;
+            }
+        } else {
+            if ($href =~ m{/}) {
+                (my $path,$fname) = ($href =~ m{^(.*)/([^/]*)$});
+                $hrefpath = $relpath.$path;
+                if ($path eq '') {
+                    $hrefpath =~ s{/$}{};
+                }
+            } else {
+                $fname = $href;
+                $hrefpath = $relpath;
+                $hrefpath =~ s{/$}{};
+            }
+        }
+        if ($fname ne '') {
+            my $cleanrelpath;
+            foreach my $dir (split(/\//,$hrefpath)) {
+                next if ($dir eq '.');
+                if ($dir eq '..') {
+                    $cleanrelpath =~ s{([^/]+/)$}{};
+                } else {
+                    $cleanrelpath .= $dir.'/';
+                }
+            }
+            if ($cleanrelpath ne '') {
+                $cleanhref = $prefix.$cleanrelpath.$fname;
+            } else {
+                $cleanhref = $prefix.$fname;
+            }
+        }
+    }
+    return $cleanhref;
+}
+
+# This is retrieving a CSS property from the style attribute of the current element.
+# It is not checking <style> elements or linked stylesheets yet.
+sub get_css_property {
+    my ($property,$parstack,$safeeval) = @_;
+    my $style=&Apache::lonxml::get_param('style',$parstack,$safeeval,undef,1);
+    my @style_components=split(/;/,$style);
+    foreach my $css_pair (@style_components) {
+        my ($name, $value) = split(/:/, $css_pair);
+        $name =~ s/^\s+|\s+$//g;
+        $value =~ s/^\s+|\s+$//g;
+        if ($name eq $property) {
+            return $value;
+        }
+    }
+    return undef;
+}
+
+=pod
+
+=head1 NAME
+
+Apache::londefdef.pm
+
+=head1 SYNOPSIS
+
+Tags Default Definition Module
+
+This is part of the LearningOnline Network with CAPA project
+described at http://www.lon-capa.org.
+
+
+=head1 NOTABLE SUBROUTINES
+
+=over
+
+=item start_hideweboutput()
+
+=item end_hideweboutput()
+
+=item image_replication()
+
+=item resize_image()
+
+	Get correct sizing parameter for an image given
+	it's initial ht. and wid.  This allows sizing of
+	images that are generated on-the-fly (e.g. gnuplot)
+	as well as serving as a utility for image_size.
+
+	Parameter:
+        height_param
+        width_param    - Initial picture dimensions.
+        scaling        - A scale factor.
+        parstack,      - the current stack of tag attributes
+                         from the xml parser
+        safeeval,      - pointer to the safespace
+        depth,         - from what level in the stack to look for attributes
+                         (assumes -1 if unspecified)
+        cis            - look for attrubutes case insensitively
+                         (assumes false)
+
+	Returns:
+		height, width   - new dimensions.
+
+=item image_size()
+
+=item image_width()
+
+=item image_height()
+
+=item get_eps_image()
+
+=item eps_generation()
+
+=item file_path()
+
+=item recalc()
+
+	Converts a measurement in to mm from any of
+	the other valid LaTeX units of measure.
+	If the units of measure are missing from the
+	parameter, it is assumed to be in and returned
+	with mm units of measure
+
+=item LATEX_length()
+
+=item align_latex_image()
+
+  	Wrap image 'stuff' inside of the LaTeX required to implement
+   	alignment:
+     	align_tex_image(align, latex_rendering, image)
+   	Where:
+     	align   - The HTML alignment specification.
+     	latex_rendering - rendering hint for latex.
+     	image   - The LaTeX needed to insert the image itsef.
+     	width,height - dimensions of the image.
+ 	Returns:
+    	The 1/2 wrapped image and the stuff required to close the
+    	wrappage.  This allows e.g. randomlabel to insert more stuff
+    	into the closure.
+
+
+=item is_inside_of($tagstack, $tag)
+   	This sub returns true if the current state of Xml processing is inside of the tag.
+	Parameters:
+    	tagstack   - The tagstack from the parser.
+    	tag        - The tag (without the <>'s.).
+	Sample usage:
+    	if (is_inside_of($tagstack "table")) {
+     	   I'm in a table....
+     	}
+
+=item clean_docs_httpref($href,$docuri,$cdom,$cnum)
+        HTML pages uploaded to a course which contain dependencies either from iframes,
+        javascript files or objects (FlashPlayerSwf, MediaSrc, XMPSrc, ConfigurationSrc,
+        and PosterImageSrc) for which dependency is another file uploaded to the same
+        course.
+
+        Required input:
+        href - dependency (either a relative URL, or an absolute URL)
+        Optional inputs:
+        docuri - URL of HTML page containing the dependency
+        cdom - Course domain
+        cnum - CourseID
+
+        Output:
+        returns an absolute URL constructed from the href provided, and the calling context.
+        (this will be null, if the URL does not begin: /uploaded/$cdom/$cnum/docs/ or
+        /uploaded/$cdom/$cnum/supplemental/).
+
+=back
+
+=cut
+
+
 1;
 __END__