--- loncom/xml/lonxml.pm	2002/09/04 03:57:18	1.190
+++ loncom/xml/lonxml.pm	2007/09/11 20:36:18	1.458
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # XML Parser Module 
 #
-# $Id: lonxml.pm,v 1.190 2002/09/04 03:57:18 albertel Exp $
+# $Id: lonxml.pm,v 1.458 2007/09/11 20:36:18 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -36,32 +36,13 @@
 # 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 Gerd Kortemeyer
-# 6/1/1 Gerd Kortemeyer
-# 2/21,3/13 Guy
-# 3/29,5/4 Gerd Kortemeyer
-# 5/10 Scott Harrison
-# 5/26 Gerd Kortemeyer
-# 5/27 H. K. Ng
-# 6/2,6/3,6/8,6/9 Gerd Kortemeyer
-# 6/12,6/13 H. K. Ng
-# 6/16 Gerd Kortemeyer
-# 7/27 H. K. Ng
-# 8/7,8/9,8/10,8/11,8/15,8/16,8/17,8/18,8/20,8/23,8/24 Gerd Kortemeyer
-# Guy Albertelli
-# 9/26 Gerd Kortemeyer
-# Dec Guy Albertelli
-# YEAR=2002
-# 1/1 Gerd Kortemeyer
-# 1/2 Matthew Hall
-# 1/3 Gerd Kortemeyer
-#
+
 
 package Apache::lonxml; 
 use vars 
-qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $prevent_entity_encode);
+qw(@pwd @outputstack $redirection $import @extlinks $metamode $evaluate %insertlist @namespace $errorcount $warningcount);
 use strict;
+use LONCAPA;
 use HTML::LCParser();
 use HTML::TreeBuilder();
 use HTML::Entities();
@@ -70,6 +51,9 @@ use Safe::Hole();
 use Math::Cephes();
 use Math::Random();
 use Opcode();
+use POSIX qw(strftime);
+use Time::HiRes qw( gettimeofday tv_interval );
+use Symbol();
 
 sub register {
   my ($space,@taglist) = @_;
@@ -95,15 +79,27 @@ use Apache::style();
 use Apache::run();
 use Apache::londefdef();
 use Apache::scripttag();
+use Apache::languagetags();
 use Apache::edit();
-use Apache::lonnet();
+use Apache::inputtags();
+use Apache::outputtags();
+use Apache::lonnet;
 use Apache::File();
 use Apache::loncommon();
+use Apache::lonfeedback();
+use Apache::lonmsg();
+use Apache::loncacc();
+use Apache::lonmaxima();
+use Apache::lonlocal;
 
 #==================================================   Main subroutine: xmlparse  
 #debugging control, to turn on debugging modify the correct handler
 $Apache::lonxml::debug=0;
 
+# keeps count of the number of warnings and errors generated in a parse
+$warningcount=0;
+$errorcount=0;
+
 #path to the directory containing the file currently being processed
 @pwd=();
 
@@ -129,100 +125,75 @@ $evaluate = 1;
 # stores the list of active tag namespaces
 @namespace=();
 
-# if 0 all high ASCII characters will be encoded into HTML Entities
-$prevent_entity_encode=0;
-
-# has the dynamic menu been updated to know about this resource
-$Apache::lonxml::registered=0;
+# stores all Scrit Vars displays for later showing
+my @script_var_displays=();
 
 # a pointer the the Apache request object
 $Apache::lonxml::request='';
 
-sub xmlbegin {
-  my $output='';
-  if ($ENV{'browser.mathml'}) {
-      $output='<?xml version="1.0"?>'
-            .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
-            .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
-            .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
-            .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" ' 
-		.'xmlns="http://www.w3.org/TR/REC-html40">';
-  } else {
-      $output='<html>';
-  }
-  return $output;
+# a problem number counter, and check on ether it is used
+$Apache::lonxml::counter=1;
+$Apache::lonxml::counter_changed=0;
+
+#internal check on whether to look at style defs
+$Apache::lonxml::usestyle=1;
+
+#locations used to store the parameter string for style substitutions
+$Apache::lonxml::style_values='';
+$Apache::lonxml::style_end_values='';
+
+#array of ssi calls that need to occur after we are done parsing
+@Apache::lonxml::ssi_info=();
+
+#should we do the postag variable interpolation
+$Apache::lonxml::post_evaluate=1;
+
+#a header message to emit in the case of any generated warning or errors
+$Apache::lonxml::warnings_error_header='';
+
+#  Control whether or not LaTeX symbols should be substituted for their
+#  \ style equivalents...this may be turned off e.g. in an verbatim
+#  environment.
+
+$Apache::lonxml::substitute_LaTeX_symbols = 1; # Starts out on.
+
+sub enable_LaTeX_substitutions {
+    $Apache::lonxml::substitute_LaTeX_symbols = 1;
+}
+sub disable_LaTeX_substitutions {
+    $Apache::lonxml::substitute_LaTeX_symbols = 0;
 }
 
 sub xmlend {
-    my $discussion='';
-    if ($ENV{'request.course.id'}) {
-       my $crs='/'.$ENV{'request.course.id'};
-       if ($ENV{'request.course.sec'}) {
-          $crs.='_'.$ENV{'request.course.sec'};
-       }                 
-       $crs=~s/\_/\//g;
-       my $seeid=&Apache::lonnet::allowed('rin',$crs);
-       my $symb=&Apache::lonnet::symbread();
-       if ($symb) {
-          my %contrib=&Apache::lonnet::restore($symb,$ENV{'request.course.id'},
-                     $ENV{'course.'.$ENV{'request.course.id'}.'.domain'},
-		     $ENV{'course.'.$ENV{'request.course.id'}.'.num'});
-          if ($contrib{'version'}) {
-              $discussion.=
-                  '<address><hr /><h2>Course Discussion of Resource</h2>';
-              my $idx;
-              for ($idx=1;$idx<=$contrib{'version'};$idx++) {
-		my $hidden=($contrib{'hidden'}=~/\.$idx\./);
-		unless (($hidden) && (!$seeid)) {
-                 my $message=$contrib{$idx.':message'};
-                 $message=~s/\n/\<br \/\>/g;
-		 $message=&Apache::lontexconvert::msgtexconverted($message);
-                 if ($message) {
-                  if ($hidden) {
-		      $message='<font color="#888888">'.$message.'</font>';
-                  }
-                  my $sender='Anonymous';
-                  if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
-                      $sender=$contrib{$idx.':plainname'}.' ('.
-                              $contrib{$idx.':sendername'}.' at '.
-		      $contrib{$idx.':senderdomain'}.')';
-                      if ($contrib{$idx.':anonymous'}) {
-			  $sender.=' [anonymous] '.
-                                     $contrib{$idx.':screenname'};
-                      }
-                      if ($seeid) {
-			  if ($hidden) {
-                             $sender.=' <a href="/adm/feedback?unhide='.
-				 $symb.':::'.$idx.'">Make Visible</a>';
-                          } else {
-                             $sender.=' <a href="/adm/feedback?hide='.
-				 $symb.':::'.$idx.'">Hide</a>';
-			  }
-                      }                   
-                  } else {
-                      if ($contrib{$idx.':screenname'}) {
-			  $sender='<i>'.$contrib{$idx.':screenname'}.'</i>';
-                      }
-                  }
-		  $discussion.='<p><b>'.$sender.'</b> ('.
-                      localtime($contrib{$idx.':timestamp'}).
-                      '):<blockquote>'.$message.
-                      '</blockquote></p>';
-	        }
-               } 
-              }
-              $discussion.='</address>';
-          }
-       }
+    my ($target,$parser)=@_;
+    my $mode='xml';
+    my $status='OPEN';
+    if ($Apache::lonhomework::parsing_a_problem ||
+	$Apache::lonhomework::parsing_a_task ) {
+	$mode='problem';
+	$status=$Apache::inputtags::status[-1]; 
     }
-    return $discussion.'</html>';
+    my $discussion;
+    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
+					   ['LONCAPA_INTERNAL_no_discussion']);
+    if (! exists($env{'form.LONCAPA_INTERNAL_no_discussion'}) ||
+        $env{'form.LONCAPA_INTERNAL_no_discussion'} ne 'true') {
+        $discussion=&Apache::lonfeedback::list_discussion($mode,$status);
+    }
+    if ($target eq 'tex') {
+	$discussion.='<tex>\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}\end{document}</tex>';
+	&Apache::lonxml::newparser($parser,\$discussion,'');
+	return '';
+    }
+
+    return $discussion;
 }
 
 sub tokeninputfield {
     my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
     $defhost=~tr/a-z/A-Z/;
     return (<<ENDINPUTFIELD)
-<script>
+<script type="text/javascript">
     function updatetoken() {
 	var comp=new Array;
         var barcode=unescape(document.tokeninput.barcode.value);
@@ -273,9 +244,9 @@ sub maketoken {
 	$symb=&Apache::lonnet::symbread();
     }
     unless ($tuname) {
-	$tuname=$ENV{'user.name'};
-        $tudom=$ENV{'user.domain'};
-        $tcrsid=$ENV{'request.course.id'};
+	$tuname=$env{'user.name'};
+        $tudom=$env{'user.domain'};
+        $tcrsid=$env{'request.course.id'};
     }
 
     return &Apache::lonnet::checkout($symb,$tuname,$tudom,$tcrsid);
@@ -285,7 +256,7 @@ sub printtokenheader {
     my ($target,$token,$tsymb,$tcrsid,$tudom,$tuname)=@_;
     unless ($token) { return ''; }
 
-    my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
+    my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
     unless ($tsymb) {
 	$tsymb=$symb;
     }
@@ -295,175 +266,24 @@ sub printtokenheader {
         $tcrsid=$courseid;
     }
 
-    my %reply=&Apache::lonnet::get('environment',
-              ['firstname','middlename','lastname','generation'],
-              $tudom,$tuname);
-    my $plainname=$reply{'firstname'}.' '. 
-                  $reply{'middlename'}.' '.
-                  $reply{'lastname'}.' '.
-		  $reply{'generation'};
+    my $plainname=&Apache::loncommon::plainname($tuname,$tudom);
 
     if ($target eq 'web') {
         my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
 	return 
- '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
-               'Checked out for '.$plainname.
-               '<br />User: '.$tuname.' at '.$tudom.
-	       '<br />ID: '.$idhash{$tuname}.
-	       '<br />CourseID: '.$tcrsid.
-	       '<br />Course: '.$ENV{'course.'.$tcrsid.'.description'}.
-               '<br />DocID: '.$token.
-               '<br />Time: '.localtime().'<hr />';
+ '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
+               &mt('Checked out for').' '.$plainname.
+               '<br />'.&mt('User').': '.$tuname.' at '.$tudom.
+	       '<br />'.&mt('ID').': '.$idhash{$tuname}.
+	       '<br />'.&mt('CourseID').': '.$tcrsid.
+	       '<br />'.&mt('Course').': '.$env{'course.'.$tcrsid.'.description'}.
+               '<br />'.&mt('DocID').': '.$token.
+               '<br />'.&mt('Time').': '.&Apache::lonlocal::locallocaltime().'<hr />';
     } else {
         return $token;
     }
 }
 
-sub fontsettings() {
-    my $headerstring='';
-    if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) { 
-         $headerstring.=
-             '<meta Content-Type="text/html; charset=x-mac-roman">';
-    }
-    return $headerstring;
-}
-
-sub registerurl {
-    my $forcereg=shift;
-    my $target = shift;
-    my $result = '';
-    if ($target eq 'edit') {
-        $result .="<script>\n".
-            "if (typeof menu != 'undefined') {menu.currentURL=null;}\n".
-            &Apache::loncommon::browser_and_searcher_javascript().
-                "\n</script>\n";
-    }
-    if ((($ENV{'request.publicaccess'}) || 
-         (!&Apache::lonnet::is_on_map($ENV{'REQUEST_URI'}))) &&
-        (!$forcereg)) {
-	return $result.
-         '<script>function LONCAPAreg(){} function LONCAPAstale(){}</script>';
-    }
-    if ($Apache::lonxml::registered && !$forcereg) { return ''; }
-    $Apache::lonxml::registered=1;
-    my $nothing='';
-    if ($ENV{'browser.type'} eq 'explorer') { $nothing='javascript:void(0);'; }
-    my $timesync='menu.syncclock(1000*'.time.');';
-    if (($ENV{'REQUEST_URI'}!~/^\/(res\/)*adm\//) || ($forcereg)) {
-        my $hwkadd='';
-        if ($ENV{'request.filename'}=~/\.(problem|exam|quiz|assess|survey|form)$/) {
-	    if (&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'})) {
-		$hwkadd.=(<<ENDSUBM);
-                     menu.switchbutton(7,1,'subm.gif','view sub','missions','gocmd("/adm/grades","submission")');
-ENDSUBM
-            }
-	    if (&Apache::lonnet::allowed('mgr',$ENV{'request.course.id'})) {
-		$hwkadd.=(<<ENDGRDS);
-                     menu.switchbutton(7,2,'pgrd.gif','problem','grades','gocmd("/adm/grades","gradingmenu")');
-ENDGRDS
-            }
-	    if (&Apache::lonnet::allowed('opa',$ENV{'request.course.id'})) {
-		$hwkadd.=(<<ENDPARM);
-                     menu.switchbutton(7,3,'pparm.gif','problem','parms','gocmd("/adm/parmset","set")');
-ENDPARM
-            }
-	}
-	$result = (<<ENDREGTHIS);
-     
-<script language="JavaScript">
-// BEGIN LON-CAPA Internal
-
-    function LONCAPAreg() {
-	  menu=window.open("$nothing","LONCAPAmenu","",false);
-          menu.clearTimeout(menu.menucltim);
-          $timesync
-	  menu.currentURL=window.location.pathname;
-          menu.reloadURL=window.location.pathname;
-          menu.currentStale=0;
-          menu.clearbut(3,1);
-          menu.switchbutton
-       (6,3,'catalog.gif','catalog','info','catalog_info()');
-          menu.switchbutton
-       (8,1,'eval.gif','evaluate','this','gopost("/adm/evaluate",currentURL)');
-          menu.switchbutton
-    (8,2,'fdbk.gif','feedback','discuss','gopost("/adm/feedback",currentURL)');
-          menu.switchbutton
-     (8,3,'prt.gif','prepare','printout','gopost("/adm/printout",currentURL)');
-          menu.switchbutton
-       (2,1,'back.gif','backward','','gopost("/adm/flip","back:"+currentURL)');
-          menu.switchbutton
-     (2,3,'forw.gif','forward','','gopost("/adm/flip","forward:"+currentURL)');
-          menu.switchbutton
-                            (9,1,'sbkm.gif','set','bookmark','set_bookmark()');
-          menu.switchbutton
-                         (9,2,'vbkm.gif','view','bookmark','edit_bookmarks()');
-          menu.switchbutton
-                               (9,3,'anot.gif','anno-','tations','annotate()');
-          $hwkadd
-    }
-
-    function LONCAPAstale() {
-	  menu=window.open("$nothing","LONCAPAmenu","",false);
-          menu.currentStale=1;
-          if (menu.reloadURL!='' && menu.reloadURL!= null) { 
-             menu.switchbutton
-             (3,1,'reload.gif','return','location','go(reloadURL)');
-	  }
-          menu.clearbut(7,1);
-          menu.clearbut(7,2);
-          menu.clearbut(7,3);
-          menu.menucltim=menu.setTimeout(
- 'clearbut(2,1);clearbut(2,3);clearbut(8,1);clearbut(8,2);clearbut(8,3);'+
- 'clearbut(9,1);clearbut(9,2);clearbut(9,3);clearbut(6,3)',
-			  2000);
-
-      }
-
-// END LON-CAPA Internal
-</script>
-ENDREGTHIS
-
-    } else {
-        $result = (<<ENDDONOTREGTHIS);
-
-<script language="JavaScript">
-// BEGIN LON-CAPA Internal
-
-    function LONCAPAreg() {
-	  menu=window.open("$nothing","LONCAPAmenu","",false);
-          $timesync
-          menu.currentStale=1;
-          menu.clearbut(2,1);
-          menu.clearbut(2,3);
-          menu.clearbut(8,1);
-          menu.clearbut(8,2);
-          menu.clearbut(8,3);
-          if (menu.currentURL) {
-             menu.switchbutton
-              (3,1,'reload.gif','return','location','go(currentURL)');
- 	  } else {
-	      menu.clearbut(3,1);
-          }
-    }
-
-    function LONCAPAstale() {
-    }
-
-// END LON-CAPA Internal
-</script>
-ENDDONOTREGTHIS
-    }
-    return $result;
-}
-
-sub loadevents() {
-    return 'LONCAPAreg();';
-}
-
-sub unloadevents() {
-    return 'LONCAPAstale();';
-}
-
 sub printalltags {
   my $temp;
   foreach $temp (sort keys %Apache::lonxml::alltags) {
@@ -476,26 +296,41 @@ sub xmlparse {
  my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
 
  &setup_globals($request,$target);
+ &Apache::inputtags::initialize_inputtags();
+ &Apache::bridgetask::initialize_bridgetask();
+ &Apache::outputtags::initialize_outputtags();
+ &Apache::edit::initialize_edit();
+ &Apache::londefdef::initialize_londefdef();
+
 #
 # do we have a course style file?
 #
 
- if ($ENV{'request.course.id'}) {
+ if ($env{'request.course.id'} && $env{'request.state'} ne 'construct') {
      my $bodytext=
-	 $ENV{'course.'.$ENV{'request.course.id'}.'.default_xml_style'};
+	 $env{'course.'.$env{'request.course.id'}.'.default_xml_style'};
      if ($bodytext) {
-       my $location=&Apache::lonnet::filelocation('',$bodytext);
-       my $styletext=&Apache::lonnet::getfile($location);
-       if ($styletext ne '-1') {
-          %style_for_target = (%style_for_target,
-                          &Apache::style::styleparser($target,$styletext));
-       }
-    }
+	 foreach my $file (split(',',$bodytext)) {
+	     my $location=&Apache::lonnet::filelocation('',$file);
+	     my $styletext=&Apache::lonnet::getfile($location);
+	     if ($styletext ne '-1') {
+		 %style_for_target = (%style_for_target,
+				      &Apache::style::styleparser($target,$styletext));
+	     }
+	 }
+     }
+ } elsif ($env{'construct.style'}
+	  && ($env{'request.state'} eq 'construct')) {
+     my $location=&Apache::lonnet::filelocation('',$env{'construct.style'});
+     my $styletext=&Apache::lonnet::getfile($location);
+     if ($styletext ne '-1') {
+	 %style_for_target = (%style_for_target,
+			      &Apache::style::styleparser($target,$styletext));
+     }
  }
-
- #&printalltags();
+#&printalltags();
  my @pars = ();
- my $pwd=$ENV{'request.filename'};
+ my $pwd=$env{'request.filename'};
  $pwd =~ s:/[^/]*$::;
  &newparser(\@pars,\$content_file_string,$pwd);
 
@@ -508,73 +343,98 @@ sub xmlparse {
 
  my @stack = ();
  my @parstack = ();
- &initdepth;
-
+ &initdepth();
+ &init_alarm();
  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
-				   $safeeval,\%style_for_target);
- if ($ENV{'request.uri'}) {
-    &writeallows($ENV{'request.uri'});
- }
- return $finaloutput;
-}
-
-sub htmlclean {
-    my ($raw,$full)=@_;
-
-    my $tree = HTML::TreeBuilder->new;
-    $tree->ignore_unknown(0);
+				   $safeeval,\%style_for_target,1);
 
-    $tree->parse($raw);
+ if (@stack) {
+     &warning("At end of file some tags were still left unclosed, ".
+	      '<tt>&lt;'.join('&gt;</tt>, <tt>&lt;',reverse(@stack)).
+	      '&gt;</tt>');
+ }
+ if ($env{'request.uri'}) {
+    &writeallows($env{'request.uri'});
+ }
+ &do_registered_ssi();
+ if ($Apache::lonxml::counter_changed) { &store_counter() }
 
-    my $output= $tree->as_HTML(undef,' ');
+ &clean_safespace($safeeval);
 
-    $output=~s/\<(br|hr|img|meta|allow)(.*?)\>/\<$1$2 \/\>/gis;
-    $output=~s/\<\/(br|hr|img|meta|allow)\>//gis;
-    unless ($full) {
-       $output=~s/\<[\/]*(body|head|html)\>//gis;
-    }
-
-    $tree = $tree->delete;
+ if (@script_var_displays) {
+     $finaloutput .= join('',@script_var_displays);
+     undef(@script_var_displays);
+ }
 
-    return $output;
+ if ($env{'form.return_only_error_and_warning_counts'}) {
+     return "$errorcount:$warningcount";
+ }
+ return $finaloutput;
 }
 
-sub latex_special_sumbols {
-    my ($current_token,$stack,$parstack)=@_;
-    my @temp_array = @$stack;
-    if ($temp_array[-1] ne 'tt') {
-	if ($current_token=~m/\^/) {$current_token=~s/\^/\\verb|\^|/g;}
+sub latex_special_symbols {
+    my ($string,$where)=@_;
+    #
+    #  If e.g. in verbatim mode, then don't substitute.
+    #  but return original string.
+    #
+    if (!($Apache::lonxml::substitute_LaTeX_symbols)) {
+	return $string;
+    }
+    if ($where eq 'header') {
+	$string =~ s/\\/\$\\backslash\$/g; # \  -> $\backslash$ per LaTex line by line pg  10.
+	$string =~ s/(\$|%|\{|\})/\\$1/g;
+	$string=&Apache::lonprintout::character_chart($string);
+	# any & or # leftover should be safe to just escape
+        $string=~s/([^\\])\&/$1\\\&/g;
+        $string=~s/([^\\])\#/$1\\\#/g;
+	$string =~ s/_/\\_/g;              # _ -> \_
+	$string =~ s/\^/\\\^{}/g;          # ^ -> \^{} 
     } else {
-	if ($current_token=~m/\^/) {$current_token=~s/\^/}\\verb|\^|{/g;}
+	$string=~s/\\/\\ensuremath{\\backslash}/g;
+	$string=~s/\\\%|\%/\\\%/g;
+	$string=~s/\\{|{/\\{/g;
+	$string=~s/\\}|}/\\}/g;
+	$string=~s/\\ensuremath\\{\\backslash\\}/\\ensuremath{\\backslash}/g;
+	$string=~s/\\\$|\$/\\\$/g;
+	$string=~s/\\\_|\_/\\\_/g;
+        $string=~s/([^\\]|^)(\~|\^)/$1\\$2\\strut /g;
+	$string=~s/(>|<)/\\ensuremath\{$1\}/g; #more or less
+	$string=&Apache::lonprintout::character_chart($string);
+	# any & or # leftover should be safe to just escape
+	$string=~s/\\\&|\&/\\\&/g;
+	$string=~s/\\\#|\#/\\\#/g;
+        $string=~s/\|/\$\\mid\$/g;
+#single { or } How to escape?
     }
-    if ($current_token=~m/>/) {$current_token=~s/>/\$>\$/g;} #more
-    if ($current_token=~m/</) {$current_token=~s/</\$<\$/g;} #less
-    if ($current_token=~m/\d%/) {$current_token =~ s/%/\\%/g;} #percent after digit
-    if ($current_token=~m/\s%/) {$current_token =~ s/%/\\%/g;} #persent after space
-
-
-#    $current_token = ' start='.$current_token.'=finish ';
-    return $current_token;
+    return $string;
 }
 
 sub inner_xmlparse {
-  my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target)=@_;
+  my ($target,$stack,$parstack,$pars,$safeeval,$style_for_target,$start)=@_;
   my $finaloutput = '';
   my $result;
   my $token;
+  my $dontpop=0;
+  my $startredirection = $Apache::lonxml::redirection;
   while ( $#$pars > -1 ) {
     while ($token = $$pars['-1']->get_token) {
-      if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
+      if (($token->[0] eq 'T') || ($token->[0] eq 'C') ) {
 	if ($metamode<1) {
 	    my $text=$token->[1];
-	    if ($token->[0] eq 'C') {
-		$text = '%'.$text;
-		$text =~ s/[\n\r]//g;
+	    if ($token->[0] eq 'C' && $target eq 'tex') {
+		$text = '';
+#		$text = '%'.$text."\n";
 	    }
 	    $result.=$text;
 	}
+      } elsif (($token->[0] eq 'D')) {
+	if ($metamode<1 && $target eq 'web') {
+	    my $text=$token->[1];
+	    $result.=$text;
+	}
       } elsif ($token->[0] eq 'PI') {
-	if ($metamode<1) {
+	if ($metamode<1 && $target eq 'web') {
 	  $result=$token->[2];
 	}
       } elsif ($token->[0] eq 'S') {
@@ -583,67 +443,67 @@ sub inner_xmlparse {
 	# add parameters list to another stack
 	push (@$parstack,&parstring($token));
 	&increasedepth($token);
-	if (exists $$style_for_target{$token->[1]}) {
-	  if ($Apache::lonxml::redirection) {
-	    $Apache::lonxml::outputstack['-1'] .=
-	      &recurse($$style_for_target{$token->[1]},$target,$safeeval,
-		       $style_for_target,@$parstack);
-	  } else {
-	    $finaloutput .= &recurse($$style_for_target{$token->[1]},$target,
-				     $safeeval,$style_for_target,@$parstack);
-	  }
+	if ($Apache::lonxml::usestyle &&
+	    exists($$style_for_target{$token->[1]})) {
+	    $Apache::lonxml::usestyle=0;
+	    my $string=$$style_for_target{$token->[1]}.
+	      '<LONCAPA_INTERNAL_TURN_STYLE_ON />';
+	    &Apache::lonxml::newparser($pars,\$string);
+	    $Apache::lonxml::style_values=$$parstack[-1];
+	    $Apache::lonxml::style_end_values=$$parstack[-1];
 	} else {
 	  $result = &callsub("start_$token->[1]", $target, $token, $stack,
 			     $parstack, $pars, $safeeval, $style_for_target);
 	}
       } elsif ($token->[0] eq 'E') {
-	#clear out any tags that didn't end
-	while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
-	  my $lasttag=$$stack[-1];
-	  if ($token->[1] =~ /^$lasttag$/i) {
-	    &Apache::lonxml::warning('Using tag &lt;/'.$token->[1].'&gt; as end tag to &lt;'.$$stack[-1].'&gt;');
-	    last;
-	  } else {
-	    &Apache::lonxml::warning('Found tag &lt;/'.$token->[1].'&gt; when looking for &lt;/'.$$stack[-1].'&gt; in file');
-	    &end_tag($stack,$parstack,$token);
-	  }
-	}
-
-	if (exists($$style_for_target{'/'."$token->[1]"})) {
-	  if ($Apache::lonxml::redirection) {
-	    $Apache::lonxml::outputstack['-1'] .=  
-	      &recurse($$style_for_target{'/'."$token->[1]"},
-		       $target,$safeeval,$style_for_target,@$parstack);
-	  } else {
-	    $finaloutput .= &recurse($$style_for_target{'/'."$token->[1]"},
-				     $target,$safeeval,$style_for_target,
-				     @$parstack);
-	  }
+	if ($Apache::lonxml::usestyle &&
+	    exists($$style_for_target{'/'."$token->[1]"})) {
+	    $Apache::lonxml::usestyle=0;
+	    my $string=$$style_for_target{'/'.$token->[1]}.
+	      '<LONCAPA_INTERNAL_TURN_STYLE_ON end="'.$token->[1].'" />';
+	    &Apache::lonxml::newparser($pars,\$string);
+	    $Apache::lonxml::style_values=$Apache::lonxml::style_end_values;
+	    $Apache::lonxml::style_end_values='';
+	    $dontpop=1;
 	} else {
-	  $result = &callsub("end_$token->[1]", $target, $token, $stack,
-			     $parstack, $pars,$safeeval, $style_for_target);
+	    #clear out any tags that didn't end
+	    while ($token->[1] ne $$stack['-1'] && ($#$stack > -1)) {
+		my $lasttag=$$stack[-1];
+		if ($token->[1] =~ /^\Q$lasttag\E$/i) {
+		    &Apache::lonxml::warning('Using tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' as end tag to &lt;'.$$stack[-1].'&gt;');
+		    last;
+		} else {
+		    &Apache::lonxml::warning('Found tag &lt;/'.$token->[1].'&gt; on line '.$token->[3].' when looking for &lt;/'.$$stack[-1].'&gt; in file');
+		    &end_tag($stack,$parstack,$token);
+		}
+	    }
+	    $result = &callsub("end_$token->[1]", $target, $token, $stack,
+			       $parstack, $pars,$safeeval, $style_for_target);
 	}
       } else {
 	&Apache::lonxml::error("Unknown token event :$token->[0]:$token->[1]:");
       }
       #evaluate variable refs in result
-      if ($result ne "") {
+      if ($Apache::lonxml::post_evaluate &&$result ne "") {
+	  my $extras;
+	  if (!$Apache::lonxml::usestyle) {
+	      $extras=$Apache::lonxml::style_values;
+	  }
 	if ( $#$parstack > -1 ) {
-	  $result=&Apache::run::evaluate($result,$safeeval,$$parstack[-1]);
+	  $result=&Apache::run::evaluate($result,$safeeval,$extras.$$parstack[-1]);
 	} else {
-	  $result= &Apache::run::evaluate($result,$safeeval,'');
+	  $result= &Apache::run::evaluate($result,$safeeval,$extras);
 	}
       }
+      $Apache::lonxml::post_evaluate=1;
+
       if (($token->[0] eq 'T') || ($token->[0] eq 'C') || ($token->[0] eq 'D') ) {
-	if ($target eq 'tex') {
-	    $result=&latex_special_sumbols($result,$stack,$parstack);
-	}
+	  #Style file definitions should be correct
+	  if ($target eq 'tex' && ($Apache::lonxml::usestyle)) {
+	      $result=&latex_special_symbols($result);
+	  }
       }
 
-      # Encode any high ASCII characters
-      if (!$Apache::lonxml::prevent_entity_encode) {
-	$result=&HTML::Entities::encode($result,"\200-\377");
-      }
       if ($Apache::lonxml::redirection) {
 	$Apache::lonxml::outputstack['-1'] .= $result;
       } else {
@@ -651,97 +511,37 @@ sub inner_xmlparse {
       }
       $result = '';
 
-      if ($token->[0] eq 'E') { 
+      if ($token->[0] eq 'E' && !$dontpop) {
 	&end_tag($stack,$parstack,$token);
       }
+      $dontpop=0;
+    }	
+    if ($#$pars > -1) {
+	pop @$pars;
+	pop @Apache::lonxml::pwd;
     }
-    pop @$pars;
-    pop @Apache::lonxml::pwd;
   }
 
   # if ($target eq 'meta') {
   #   $finaloutput.=&endredirection;
   # }
 
-
+  if ( $start && $target eq 'grade') { &endredirection(); }
+  if ( $Apache::lonxml::redirection > $startredirection) {
+      while ($Apache::lonxml::redirection > $startredirection) {
+	  $finaloutput .= &endredirection();
+      }
+  }
   if (($ENV{'QUERY_STRING'}) && ($target eq 'web')) {
     $finaloutput=&afterburn($finaloutput);
-  }
+  }	    
   return $finaloutput;
 }
 
-sub recurse {
-  my @innerstack = (); 
-  my @innerparstack = ();
-  my ($newarg,$target,$safeeval,$style_for_target,@parstack) = @_;
-  my @pat = ();
-  &newparser(\@pat,\$newarg);
-  my $tokenpat;
-  my $partstring = '';
-  my $output='';
-  my $decls='';
-  &Apache::lonxml::debug("Recursing");
-  while ( $#pat > -1 ) {
-    while  ($tokenpat = $pat[$#pat]->get_token) {
-      if (($tokenpat->[0] eq 'T') || ($tokenpat->[0] eq 'C') || ($tokenpat->[0] eq 'D') ) {
-	if ($metamode<1) { $partstring=$tokenpat->[1]; }
-      } elsif ($tokenpat->[0] eq 'PI') {
-	if ($metamode<1) { $partstring=$tokenpat->[2]; }
-      } elsif ($tokenpat->[0] eq 'S') {
-	push (@innerstack,$tokenpat->[1]);
-	push (@innerparstack,&parstring($tokenpat));
-	&increasedepth($tokenpat);
-	$partstring = &callsub("start_$tokenpat->[1]", $target, $tokenpat,
-			       \@innerstack, \@innerparstack, \@pat,
-			       $safeeval, $style_for_target);
-      } elsif ($tokenpat->[0] eq 'E') {
-	#clear out any tags that didn't end
-	while ($tokenpat->[1] ne $innerstack[$#innerstack]
-	       && ($#innerstack > -1)) {
-	  my $lasttag=$innerstack[-1];
-	  if ($tokenpat->[1] =~ /^$lasttag$/i) {
-	    &Apache::lonxml::warning('Using tag &lt;/'.$tokenpat->[1].'&gt; as end tag to &lt;'.$innerstack[-1].'&gt;');
-	    last;
-	  } else {
-	    &Apache::lonxml::warning('Found tag &lt;/'.$tokenpat->[1].'&gt; when looking for &lt;/'.$innerstack[-1].'&gt; in file');
-	    &end_tag(\@innerstack,\@innerparstack,$tokenpat);
-	  }
-	}
-	$partstring = &callsub("end_$tokenpat->[1]", $target, $tokenpat,
-			       \@innerstack, \@innerparstack, \@pat,
-			       $safeeval, $style_for_target);
-      } else {
-	&Apache::lonxml::error("Unknown token event :$tokenpat->[0]:$tokenpat->[1]:");
-      }
-      #pass both the variable to the style tag, and the tag we 
-      #are processing inside the <definedtag>
-      if ( $partstring ne "" ) {
-	if ( $#parstack > -1 ) { 
-	  if ( $#innerparstack > -1 ) { 
-	    $decls= $parstack[$#parstack].$innerparstack[$#innerparstack];
-	  } else {
-	    $decls= $parstack[$#parstack];
-	  }
-	} else {
-	  if ( $#innerparstack > -1 ) { 
-	    $decls=$innerparstack[$#innerparstack];
-	  } else {
-	    $decls='';
-	  }
-	}
-	$output .= &Apache::run::evaluate($partstring,$safeeval,$decls);
-	$partstring = '';
-      }
-      if ($tokenpat->[0] eq 'E') { pop @innerstack;pop @innerparstack;
-				 &decreasedepth($tokenpat);}
-    }
-    pop @pat;
-    pop @Apache::lonxml::pwd;
-  }
-  &Apache::lonxml::debug("Exiting Recursing");
-  return $output;
-}
-
+## 
+## Looks to see if there is a subroutine defined for this tag.  If so, call it,
+## otherwise do not call it as we do not know what it is.
+##
 sub callsub {
   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $currentstring='';
@@ -750,6 +550,8 @@ sub callsub {
     my $sub1;
     no strict 'refs';
     my $tag=$token->[1];
+# get utterly rid of extended html tags
+    if ($tag=~/^x\-/i) { return ''; }
     my $space=$Apache::lonxml::alltags{$tag}[-1];
     if (!$space) {
      	$tag=~tr/A-Z/a-z/;
@@ -758,7 +560,6 @@ sub callsub {
     }
 
     my $deleted=0;
-    $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
     if (($token->[0] eq 'S') && ($target eq 'modified')) {
       $deleted=&Apache::edit::handle_delete($space,$target,$token,$tagstack,
 					     $parstack,$parser,$safeeval,
@@ -766,13 +567,17 @@ sub callsub {
     }
     if (!$deleted) {
       if ($space) {
-	&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
+	#&Apache::lonxml::debug("Calling sub $sub in $space $metamode");
 	$sub1="$space\:\:$sub";
 	($currentstring,$nodefault) = &$sub1($target,$token,$tagstack,
 					     $parstack,$parser,$safeeval,
 					     $style);
       } else {
-	&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
+          if ($target eq 'tex') {
+              # throw away tag name
+              return '';
+          }
+	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
 	if ($metamode <1) {
 	  if (defined($token->[4]) && ($metamode < 1)) {
 	    $currentstring = $token->[4];
@@ -784,20 +589,29 @@ sub callsub {
       #    &Apache::lonxml::debug("nodefalt:$nodefault:");
       if ($currentstring eq '' && $nodefault eq '') {
 	if ($target eq 'edit') {
-	  &Apache::lonxml::debug("doing default edit for $token->[1]");
+	  #&Apache::lonxml::debug("doing default edit for $token->[1]");
 	  if ($token->[0] eq 'S') {
 	    $currentstring = &Apache::edit::tag_start($target,$token);
 	  } elsif ($token->[0] eq 'E') {
 	    $currentstring = &Apache::edit::tag_end($target,$token);
 	  }
-	} elsif ($target eq 'modified') {
+	}
+      }
+      if ($target eq 'modified' && $nodefault eq '') {
+	  if ($currentstring eq '') {
+	      if ($token->[0] eq 'S') {
+		  $currentstring = $token->[4];
+	      } elsif ($token->[0] eq 'E') {
+		  $currentstring = $token->[2];
+	      } else {
+		  $currentstring = $token->[2];
+	      }
+	  }
 	  if ($token->[0] eq 'S') {
-	    $currentstring = $token->[4];
-	    $currentstring.=&Apache::edit::handle_insert();
-	  } else {
-	    $currentstring = $token->[2];
+	      $currentstring.=&Apache::edit::handle_insert();
+	  } elsif ($token->[0] eq 'E') {
+	      $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
 	  }
-	}
       }
     }
     use strict 'refs';
@@ -808,9 +622,18 @@ sub callsub {
 sub setup_globals {
   my ($request,$target)=@_;
   $Apache::lonxml::request=$request;
-  $Apache::lonxml::registered = 0;
+  $errorcount=0;
+  $warningcount=0;
+  $Apache::lonxml::default_homework_loaded=0;
+  $Apache::lonxml::usestyle=1;
+  &init_counter();
   @Apache::lonxml::pwd=();
   @Apache::lonxml::extlinks=();
+  @script_var_displays=();
+  @Apache::lonxml::ssi_info=();
+  $Apache::lonxml::post_evaluate=1;
+  $Apache::lonxml::warnings_error_header='';
+  $Apache::lonxml::substitute_LaTeX_symbols = 1;
   if ($target eq 'meta') {
     $Apache::lonxml::redirection = 0;
     $Apache::lonxml::metamode = 1;
@@ -822,7 +645,7 @@ sub setup_globals {
     $Apache::lonxml::evaluate = 1;
     $Apache::lonxml::import = 1;
   } elsif ($target eq 'grade') {
-    &startredirection;
+    &startredirection(); #ended in inner_xmlparse on exit
     $Apache::lonxml::metamode = 0;
     $Apache::lonxml::evaluate = 1;
     $Apache::lonxml::import = 1;
@@ -851,13 +674,31 @@ sub setup_globals {
 
 sub init_safespace {
   my ($target,$safeeval,$safehole,$safeinit) = @_;
+  $safeeval->deny_only(':dangerous');
+  $safeeval->reval('use Math::Complex;');
+  $safeeval->permit_only(":default");
   $safeeval->permit("entereval");
   $safeeval->permit(":base_math");
   $safeeval->permit("sort");
+  $safeeval->permit("time");
+  $safeeval->deny("rand");
+  $safeeval->deny("srand");
   $safeeval->deny(":base_io");
   $safehole->wrap(\&Apache::scripttag::xmlparse,$safeeval,'&xmlparse');
+  $safehole->wrap(\&Apache::outputtags::multipart,$safeeval,'&multipart');
   $safehole->wrap(\&Apache::lonnet::EXT,$safeeval,'&EXT');
-  
+  $safehole->wrap(\&Apache::chemresponse::chem_standard_order,$safeeval,
+		  '&chem_standard_order');
+  $safehole->wrap(\&Apache::response::check_status,$safeeval,'&check_status');
+
+  $safehole->wrap(\&Apache::lonmaxima::maxima_eval,$safeeval,'&maxima_eval');
+  $safehole->wrap(\&Apache::lonmaxima::maxima_check,$safeeval,'&maxima_check');
+  $safehole->wrap(\&Apache::lonmaxima::maxima_cas_formula_fix,$safeeval,
+		  '&maxima_cas_formula_fix');
+
+  $safehole->wrap(\&Apache::caparesponse::capa_formula_fix,$safeeval,
+		  '&capa_formula_fix');
+
   $safehole->wrap(\&Math::Cephes::asin,$safeeval,'&asin');
   $safehole->wrap(\&Math::Cephes::acos,$safeeval,'&acos');
   $safehole->wrap(\&Math::Cephes::atan,$safeeval,'&atan');
@@ -877,6 +718,67 @@ sub init_safespace {
   $safehole->wrap(\&Math::Cephes::y1,$safeeval,'&y1');
   $safehole->wrap(\&Math::Cephes::yn,$safeeval,'&yn');
   $safehole->wrap(\&Math::Cephes::yv,$safeeval,'&yv');
+  
+  $safehole->wrap(\&Math::Cephes::bdtr  ,$safeeval,'&bdtr'  );
+  $safehole->wrap(\&Math::Cephes::bdtrc ,$safeeval,'&bdtrc' );
+  $safehole->wrap(\&Math::Cephes::bdtri ,$safeeval,'&bdtri' );
+  $safehole->wrap(\&Math::Cephes::btdtr ,$safeeval,'&btdtr' );
+  $safehole->wrap(\&Math::Cephes::chdtr ,$safeeval,'&chdtr' );
+  $safehole->wrap(\&Math::Cephes::chdtrc,$safeeval,'&chdtrc');
+  $safehole->wrap(\&Math::Cephes::chdtri,$safeeval,'&chdtri');
+  $safehole->wrap(\&Math::Cephes::fdtr  ,$safeeval,'&fdtr'  );
+  $safehole->wrap(\&Math::Cephes::fdtrc ,$safeeval,'&fdtrc' );
+  $safehole->wrap(\&Math::Cephes::fdtri ,$safeeval,'&fdtri' );
+  $safehole->wrap(\&Math::Cephes::gdtr  ,$safeeval,'&gdtr'  );
+  $safehole->wrap(\&Math::Cephes::gdtrc ,$safeeval,'&gdtrc' );
+  $safehole->wrap(\&Math::Cephes::nbdtr ,$safeeval,'&nbdtr' );
+  $safehole->wrap(\&Math::Cephes::nbdtrc,$safeeval,'&nbdtrc');
+  $safehole->wrap(\&Math::Cephes::nbdtri,$safeeval,'&nbdtri');
+  $safehole->wrap(\&Math::Cephes::ndtr  ,$safeeval,'&ndtr'  );
+  $safehole->wrap(\&Math::Cephes::ndtri ,$safeeval,'&ndtri' );
+  $safehole->wrap(\&Math::Cephes::pdtr  ,$safeeval,'&pdtr'  );
+  $safehole->wrap(\&Math::Cephes::pdtrc ,$safeeval,'&pdtrc' );
+  $safehole->wrap(\&Math::Cephes::pdtri ,$safeeval,'&pdtri' );
+  $safehole->wrap(\&Math::Cephes::stdtr ,$safeeval,'&stdtr' );
+  $safehole->wrap(\&Math::Cephes::stdtri,$safeeval,'&stdtri');
+
+  $safehole->wrap(\&Math::Cephes::Matrix::mat,$safeeval,'&mat');
+  $safehole->wrap(\&Math::Cephes::Matrix::new,$safeeval,
+		  '&Math::Cephes::Matrix::new');
+  $safehole->wrap(\&Math::Cephes::Matrix::coef,$safeeval,
+		  '&Math::Cephes::Matrix::coef');
+  $safehole->wrap(\&Math::Cephes::Matrix::clr,$safeeval,
+		  '&Math::Cephes::Matrix::clr');
+  $safehole->wrap(\&Math::Cephes::Matrix::add,$safeeval,
+		  '&Math::Cephes::Matrix::add');
+  $safehole->wrap(\&Math::Cephes::Matrix::sub,$safeeval,
+		  '&Math::Cephes::Matrix::sub');
+  $safehole->wrap(\&Math::Cephes::Matrix::mul,$safeeval,
+		  '&Math::Cephes::Matrix::mul');
+  $safehole->wrap(\&Math::Cephes::Matrix::div,$safeeval,
+		  '&Math::Cephes::Matrix::div');
+  $safehole->wrap(\&Math::Cephes::Matrix::inv,$safeeval,
+		  '&Math::Cephes::Matrix::inv');
+  $safehole->wrap(\&Math::Cephes::Matrix::transp,$safeeval,
+		  '&Math::Cephes::Matrix::transp');
+  $safehole->wrap(\&Math::Cephes::Matrix::simq,$safeeval,
+		  '&Math::Cephes::Matrix::simq');
+  $safehole->wrap(\&Math::Cephes::Matrix::mat_to_vec,$safeeval,
+		  '&Math::Cephes::Matrix::mat_to_vec');
+  $safehole->wrap(\&Math::Cephes::Matrix::vec_to_mat,$safeeval,
+		  '&Math::Cephes::Matrix::vec_to_mat');
+  $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
+		  '&Math::Cephes::Matrix::check');
+  $safehole->wrap(\&Math::Cephes::Matrix::check,$safeeval,
+		  '&Math::Cephes::Matrix::check');
+
+#  $safehole->wrap(\&Math::Cephes::new_fract,$safeeval,'&new_fract');
+#  $safehole->wrap(\&Math::Cephes::radd,$safeeval,'&radd');
+#  $safehole->wrap(\&Math::Cephes::rsub,$safeeval,'&rsub');
+#  $safehole->wrap(\&Math::Cephes::rmul,$safeeval,'&rmul');
+#  $safehole->wrap(\&Math::Cephes::rdiv,$safeeval,'&rdiv');
+#  $safehole->wrap(\&Math::Cephes::euclid,$safeeval,'&euclid');
+
   $safehole->wrap(\&Math::Random::random_beta,$safeeval,'&math_random_beta');
   $safehole->wrap(\&Math::Random::random_chi_square,$safeeval,'&math_random_chi_square');
   $safehole->wrap(\&Math::Random::random_exponential,$safeeval,'&math_random_exponential');
@@ -898,29 +800,114 @@ sub init_safespace {
   $safehole->wrap(\&Math::Random::random_set_seed_from_phrase,$safeeval,'&random_set_seed_from_phrase');
   $safehole->wrap(\&Math::Random::random_get_seed,$safeeval,'&random_get_seed');
   $safehole->wrap(\&Math::Random::random_set_seed,$safeeval,'&random_set_seed');
-
+  $safehole->wrap(\&Apache::loncommon::languages,$safeeval,'&languages');
+  $safehole->wrap(\&Apache::lonxml::error,$safeeval,'&LONCAPA_INTERNAL_ERROR');
+  $safehole->wrap(\&Apache::lonxml::debug,$safeeval,'&LONCAPA_INTERNAL_DEBUG');
+  $safehole->wrap(\&Apache::lonnet::logthis,$safeeval,'&LONCAPA_INTERNAL_LOGTHIS');
+  $safehole->wrap(\&Apache::inputtags::finalizeawards,$safeeval,'&LONCAPA_INTERNAL_FINALIZEAWARDS');
+  $safehole->wrap(\&Apache::caparesponse::get_sigrange,$safeeval,'&LONCAPA_INTERNAL_get_sigrange');
+#  use Data::Dumper;
+#  $safehole->wrap(\&Data::Dumper::Dumper,$safeeval,'&LONCAPA_INTERNAL_Dumper');
 #need to inspect this class of ops
 # $safeeval->deny(":base_orig");
+  $safeeval->permit("require");
   $safeinit .= ';$external::target="'.$target.'";';
-  my $rndseed;
-  my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
-  $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
-  $safeinit .= ';$external::randomseed='.$rndseed.';';
   &Apache::run::run($safeinit,$safeeval);
+  &initialize_rndseed($safeeval);
+}
+
+sub clean_safespace {
+    my ($safeeval) = @_;
+    delete_package_recurse($safeeval->{Root});
+}
+
+sub delete_package_recurse {
+     my ($package) = @_;
+     my @subp;
+     {
+	 no strict 'refs';
+	 while (my ($key,$val) = each(%{*{"$package\::"}})) {
+	     if (!defined($val)) { next; }
+	     local (*ENTRY) = $val;
+	     if (defined *ENTRY{HASH} && $key =~ /::$/ &&
+		 $key ne "main::" && $key ne "<none>::")
+	     {
+		 my ($p) = $package ne "main" ? "$package\::" : "";
+		 ($p .= $key) =~ s/::$//;
+		 push(@subp,$p);
+	     }
+	 }
+     }
+     foreach my $p (@subp) {
+	 delete_package_recurse($p);
+     }
+     Symbol::delete_package($package);
 }
 
+sub initialize_rndseed {
+    my ($safeeval)=@_;
+    my $rndseed;
+    my ($symb,$courseid,$domain,$name) = &Apache::lonnet::whichuser();
+    $rndseed=&Apache::lonnet::rndseed($symb,$courseid,$domain,$name);
+    my $safeinit = '$external::randomseed="'.$rndseed.'";';
+    &Apache::lonxml::debug("Setting rndseed to $rndseed");
+    &Apache::run::run($safeinit,$safeeval);
+}
+
+sub default_homework_load {
+    my ($safeeval)=@_;
+    &Apache::lonxml::debug('Loading default_homework');
+    my $default=&Apache::lonnet::getfile('/home/httpd/html/res/adm/includes/default_homework.lcpm');
+    if ($default eq -1) {
+	&Apache::lonxml::error("<b>Unable to find <i>default_homework.lcpm</i></b>");
+    } else {
+	&Apache::run::run($default,$safeeval);
+	$Apache::lonxml::default_homework_loaded=1;
+    }
+}
+
+{
+    my $alarm_depth;
+    sub init_alarm {
+	alarm(0);
+	$alarm_depth=0;
+    }
+
+    sub start_alarm {
+	if ($alarm_depth<1) {
+	    my $old=alarm($Apache::lonnet::perlvar{'lonScriptTimeout'});
+	    if ($old) {
+		&Apache::lonxml::error("Cancelled an alarm of $old, this shouldn't occur.");
+	    }
+	}
+	$alarm_depth++;
+    }
+
+    sub end_alarm {
+	$alarm_depth--;
+	if ($alarm_depth<1) { alarm(0); }
+    }
+}
+my $metamode_was;
 sub startredirection {
-  $Apache::lonxml::redirection++;
-  push (@Apache::lonxml::outputstack, '');
+    if (!$Apache::lonxml::redirection) {
+	$metamode_was=$Apache::lonxml::metamode;
+    }
+    $Apache::lonxml::metamode=0;
+    $Apache::lonxml::redirection++;
+    push (@Apache::lonxml::outputstack, '');
 }
 
 sub endredirection {
-  if (!$Apache::lonxml::redirection) {
-    &Apache::lonxml::error("Endredirection was called, before a startredirection, perhaps you have unbalanced tags. Some debuging information:".join ":",caller);
-    return '';
-  }
-  $Apache::lonxml::redirection--;
-  pop @Apache::lonxml::outputstack;
+    if (!$Apache::lonxml::redirection) {
+	&Apache::lonxml::error("Endredirection was called before a startredirection, perhaps you have unbalanced tags. Some debugging information:".join ":",caller);
+	return '';
+    }
+    $Apache::lonxml::redirection--;
+    if (!$Apache::lonxml::redirection) {
+	$Apache::lonxml::metamode=$metamode_was;
+    }
+    pop @Apache::lonxml::outputstack;
 }
 
 sub end_tag {
@@ -932,157 +919,358 @@ sub end_tag {
 
 sub initdepth {
   @Apache::lonxml::depthcounter=();
-  $Apache::lonxml::depth=-1;
-  $Apache::lonxml::olddepth=-1;
+  undef($Apache::lonxml::last_depth_count);
 }
 
+
+my @timers;
+my $lasttime;
+# @Apache::lonxml::depthcounter -> count of tags that exist so
+#                                  far at each level
+# $Apache::lonxml::last_depth_count -> when ascending, need to
+# remember the count for the level below the current level (for
+# example going from 1_2 -> 1 -> 1_3 need to remember the 2 )
+
 sub increasedepth {
   my ($token) = @_;
-  $Apache::lonxml::depth++;
-  $Apache::lonxml::depthcounter[$Apache::lonxml::depth]++;
-  if ($Apache::lonxml::depthcounter[$Apache::lonxml::depth]==1) {
-    $Apache::lonxml::olddepth=$Apache::lonxml::depth;
-  }
-  my $curdepth=join('_',@Apache::lonxml::depthcounter);
-  &Apache::lonxml::debug("s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n");
+  push(@Apache::lonxml::depthcounter,$Apache::lonxml::last_depth_count+1);
+  undef($Apache::lonxml::last_depth_count);
+  my $time;
+  if ($Apache::lonxml::debug eq "1") {
+      push(@timers,[&gettimeofday()]);
+      $time=&tv_interval($lasttime);
+      $lasttime=[&gettimeofday()];
+  }
+  my $spacing='  'x($#Apache::lonxml::depthcounter);
+  $Apache::lonxml::curdepth=join('_',@Apache::lonxml::depthcounter);
+#  &Apache::lonxml::debug("s$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time");
 #print "<br />s $Apache::lonxml::depth : $Apache::lonxml::olddepth : $curdepth : $token->[1]\n";
 }
 
 sub decreasedepth {
   my ($token) = @_;
-  $Apache::lonxml::depth--;
-  if ($Apache::lonxml::depth<$Apache::lonxml::olddepth-1) {
-    $#Apache::lonxml::depthcounter--;
-    $Apache::lonxml::olddepth=$Apache::lonxml::depth+1;
+  if (  $#Apache::lonxml::depthcounter == -1) {
+      &Apache::lonxml::warning(&mt("Missing tags, unable to properly run file."));
   }
-  if (  $Apache::lonxml::depth < -1) {
-    &Apache::lonxml::warning("Missing tags, unable to properly run file.");
-    $Apache::lonxml::depth='-1';
-  }
-  my $curdepth=join('_',@Apache::lonxml::depthcounter);
-  &Apache::lonxml::debug("e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n");
+  $Apache::lonxml::last_depth_count = pop(@Apache::lonxml::depthcounter);
+
+  my ($timer,$time);
+  if ($Apache::lonxml::debug eq "1") {
+      $timer=pop(@timers);
+      $time=&tv_interval($lasttime);
+      $lasttime=[&gettimeofday()];
+  }
+  my $spacing='  'x($#Apache::lonxml::depthcounter);
+  $Apache::lonxml::curdepth = join('_',@Apache::lonxml::depthcounter);
+#  &Apache::lonxml::debug("e$spacing$Apache::lonxml::depth : $Apache::lonxml::olddepth : $Apache::lonxml::curdepth : $token->[1] : $time : ".&tv_interval($timer));
 #print "<br />e $Apache::lonxml::depth : $Apache::lonxml::olddepth : $token->[1] : $curdepth\n";
 }
 
+sub get_id {
+    my ($parstack,$safeeval)=@_;
+    my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
+    if ($env{'request.state'} eq 'construct' && $id =~ /([._]|[^\w\d\s[:punct:]])/) {
+	&error(&mt("ID &quot;[_1]&quot; contains invalid characters, IDs are only allowed to contain letters, numbers, spaces and -",'<tt>'.$id.'</tt>'));
+    }
+    if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
+    return $id;
+}
+
 sub get_all_text_unbalanced {
 #there is a copy of this in lonpublisher.pm
- my($tag,$pars)= @_;
- my $token;
- my $result='';
- $tag='<'.$tag.'>';
- while ($token = $$pars[-1]->get_token) {
-   if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
-     $result.=$token->[1];
-   } elsif ($token->[0] eq 'PI') {
-     $result.=$token->[2];
-   } elsif ($token->[0] eq 'S') {
-     $result.=$token->[4];
-   } elsif ($token->[0] eq 'E')  {
-     $result.=$token->[2];
-   }
-   if ($result =~ /(.*)$tag(.*)/) {
-     &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
-     &Apache::lonxml::debug('Result is :'.$1);
-     $result=$1;
-     my $redo=$tag.$2;
-     &Apache::lonxml::newparser($pars,\$redo);
-     last;
-   }
- }
- return $result
+    my($tag,$pars)= @_;
+    my $token;
+    my $result='';
+    $tag='<'.$tag.'>';
+    while ($token = $$pars[-1]->get_token) {
+	if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
+	    if ($token->[0] eq 'T' && $token->[2]) {
+		$result.='<![CDATA['.$token->[1].']]>';
+	    } else {
+		$result.=$token->[1];
+	    }
+	} elsif ($token->[0] eq 'PI') {
+	    $result.=$token->[2];
+	} elsif ($token->[0] eq 'S') {
+	    $result.=$token->[4];
+	} elsif ($token->[0] eq 'E')  {
+	    $result.=$token->[2];
+	}
+	if ($result =~ /\Q$tag\E/is) {
+	    ($result,my $redo)=$result =~ /(.*)\Q$tag\E(.*)/is;
+	    #&Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
+	    #&Apache::lonxml::debug('Result is :'.$1);
+	    $redo=$tag.$redo;
+	    &Apache::lonxml::newparser($pars,\$redo);
+	    last;
+	}
+    }
+    return $result
+}
+
+=pod
+
+For bubble grading mode and exam bubble printing mode, the tracking of
+the current 'bubble line number' is stored in the %env element
+'form.counter', and is modifed and handled by the following routines.
+
+The value of it is stored in $Apache:lonxml::counter when live and
+stored back to env after done.
+
+=item &increment_counter($increment);
+
+Increments the internal counter environment variable a specified amount
+
+Optional Arguments:
+  $increment - amount to increment by (defaults to 1)
+
+=cut
+
+sub increment_counter {
+    my ($increment) = @_;
+    if (defined($increment) && $increment gt 0) {
+	$Apache::lonxml::counter+=$increment;
+    } else {
+	$Apache::lonxml::counter++;
+    }
+    $Apache::lonxml::counter_changed=1;
+}
+
+=pod
+
+=item &init_counter($increment);
+
+Initialize the internal counter environment variable
+
+=cut
+
+sub init_counter {
+    if ($env{'request.state'} eq 'construct') {
+	$Apache::lonxml::counter=1;
+	$Apache::lonxml::counter_changed=1;
+    } elsif (defined($env{'form.counter'})) {
+	$Apache::lonxml::counter=$env{'form.counter'};
+	$Apache::lonxml::counter_changed=0;
+    } else {
+	$Apache::lonxml::counter=1;
+	$Apache::lonxml::counter_changed=1;
+    }
+}
+
+sub store_counter {
+    &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
+    $Apache::lonxml::counter_changed=0;
+    return '';
+}
+
+{
+    my $state;
+    sub clear_problem_counter {
+	undef($state);
+	&Apache::lonnet::delenv('form.counter');
+	&Apache::lonxml::init_counter();
+	&Apache::lonxml::store_counter();
+    }
+
+    sub remember_problem_counter {
+	&Apache::lonnet::transfer_profile_to_env(undef,undef,1);
+	$state = $env{'form.counter'};
+    }
+
+    sub restore_problem_counter {
+	if (defined($state)) {
+	    &Apache::lonnet::appenv(('form.counter' => $state));
+	}
+    }
+    sub get_problem_counter {
+	if ($Apache::lonxml::counter_changed) { &store_counter() }
+	&Apache::lonnet::transfer_profile_to_env(undef,undef,1);
+	return $env{'form.counter'};
+    }
 }
 
 sub get_all_text {
- my($tag,$pars)= @_;
- my $depth=0;
- my $token;
- my $result='';
- if ( $tag =~ m:^/: ) { 
-   my $tag=substr($tag,1); 
-#   &Apache::lonxml::debug("have:$tag:");
-   while (($depth >=0) && ($token = $pars->get_token)) {
-#     &Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]");
-     if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
-       $result.=$token->[1];
-     } elsif ($token->[0] eq 'PI') {
-       $result.=$token->[2];
-     } elsif ($token->[0] eq 'S') {
-       if ($token->[1] =~ /^$tag$/i) { $depth++; }
-       $result.=$token->[4];
-     } elsif ($token->[0] eq 'E')  {
-       if ( $token->[1] =~ /^$tag$/i) { $depth--; }
-       #skip sending back the last end tag
-       if ($depth > -1) { $result.=$token->[2]; } else {
-	 $pars->unget_token($token);
-       }
-     }
-   }
- } else {
-   while ($token = $pars->get_token) {
-#     &Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
-     if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
-       $result.=$token->[1];
-     } elsif ($token->[0] eq 'PI') {
-       $result.=$token->[2];
-     } elsif ($token->[0] eq 'S') {
-       if ( $token->[1] =~ /^$tag$/i) {
-	 $pars->unget_token($token); last;
-       } else {
-	 $result.=$token->[4];
-       }
-     } elsif ($token->[0] eq 'E')  {
-       $result.=$token->[2];
-     }
-   }
- }
-# &Apache::lonxml::debug("Exit:$result:");
- return $result
+    my($tag,$pars,$style)= @_;
+    my $gotfullstack=1;
+    if (ref($pars) ne 'ARRAY') {
+	$gotfullstack=0;
+	$pars=[$pars];
+    }
+    if (ref($style) ne 'HASH') {
+	$style={};
+    }
+    my $depth=0;
+    my $token;
+    my $result='';
+    if ( $tag =~ m:^/: ) { 
+	my $tag=substr($tag,1); 
+	#&Apache::lonxml::debug("have:$tag:");
+	my $top_empty=0;
+	while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
+	    while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
+		#&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
+		if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
+		    if ($token->[2]) {
+			$result.='<![CDATA['.$token->[1].']]>';
+		    } else {
+			$result.=$token->[1];
+		    }
+		} elsif ($token->[0] eq 'PI') {
+		    $result.=$token->[2];
+		} elsif ($token->[0] eq 'S') {
+		    if ($token->[1] =~ /^\Q$tag\E$/i) { $depth++; }
+		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
+		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
+		    $result.=$token->[4];
+		} elsif ($token->[0] eq 'E')  {
+		    if ( $token->[1] =~ /^\Q$tag\E$/i) { $depth--; }
+		    #skip sending back the last end tag
+		    if ($depth == 0 && exists($$style{'/'.$token->[1]}) && $Apache::lonxml::usestyle) {
+			my $string=
+			    '<LONCAPA_INTERNAL_TURN_STYLE_OFF end="yes" />'.
+				$$style{'/'.$token->[1]}.
+				    $token->[2].
+					'<LONCAPA_INTERNAL_TURN_STYLE_ON />';
+			&Apache::lonxml::newparser($pars,\$string);
+			#&Apache::lonxml::debug("reParsing $string");
+			next;
+		    }
+		    if ($depth > -1) {
+			$result.=$token->[2];
+		    } else {
+			$$pars[-1]->unget_token($token);
+		    }
+		}
+	    }
+	    if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
+	    if (($depth >=0) && ($#$pars > 0) ) {
+		pop(@$pars);
+		pop(@Apache::lonxml::pwd);
+	    }
+	}
+	if ($top_empty && $depth >= 0) {
+	    #never found the end tag ran out of text, throw error send back blank
+	    &error('Never found end tag for &lt;'.$tag.
+		   '&gt; current string <pre>'.
+		   &HTML::Entities::encode($result,'<>&"').
+		   '</pre>');
+	    if ($gotfullstack) {
+		my $newstring='</'.$tag.'>'.$result;
+		&Apache::lonxml::newparser($pars,\$newstring);
+	    }
+	    $result='';
+	}
+    } else {
+	while ($#$pars > -1) {
+	    while ($token = $$pars[-1]->get_token) {
+		#&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
+		if (($token->[0] eq 'T')||($token->[0] eq 'C')||
+		    ($token->[0] eq 'D')) {
+		    if ($token->[2]) {
+			$result.='<![CDATA['.$token->[1].']]>';
+		    } else {
+			$result.=$token->[1];
+		    }
+		} elsif ($token->[0] eq 'PI') {
+		    $result.=$token->[2];
+		} elsif ($token->[0] eq 'S') {
+		    if ( $token->[1] =~ /^\Q$tag\E$/i) {
+			$$pars[-1]->unget_token($token); last;
+		    } else {
+			$result.=$token->[4];
+		    }
+		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_ON$/) { $Apache::lonxml::usestyle=1; }
+		    if ($token->[1] =~ /^LONCAPA_INTERNAL_TURN_STYLE_OFF$/) { $Apache::lonxml::usestyle=0; }
+		} elsif ($token->[0] eq 'E')  {
+		    $result.=$token->[2];
+		}
+	    }
+	    if (($#$pars > 0) ) {
+		pop(@$pars);
+		pop(@Apache::lonxml::pwd);
+	    } else { last; }
+	}
+    }
+    #&Apache::lonxml::debug("Exit:$result:");
+    return $result
 }
 
 sub newparser {
   my ($parser,$contentref,$dir) = @_;
   push (@$parser,HTML::LCParser->new($contentref));
-  $$parser['-1']->xml_mode('1');
+  $$parser[-1]->xml_mode(1);
+  $$parser[-1]->marked_sections(1);
   if ( $dir eq '' ) {
     push (@Apache::lonxml::pwd, $Apache::lonxml::pwd[$#Apache::lonxml::pwd]);
   } else {
     push (@Apache::lonxml::pwd, $dir);
   } 
-#  &Apache::lonxml::debug("pwd:$#Apache::lonxml::pwd");
-#  &Apache::lonxml::debug("pwd:$Apache::lonxml::pwd[$#Apache::lonxml::pwd]");
 }
 
 sub parstring {
-  my ($token) = @_;
-  my $temp='';
-  foreach (@{$token->[3]}) {
-    unless ($_=~/\W/) {
-      my $val=$token->[2]->{$_};
-      $val =~ s/([\%\@\\\"])/\\$1/g;
-      #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
-      $temp .= "my \$$_=\"$val\";"
+    my ($token) = @_;
+    my (@vars,@values);
+    foreach my $attr (@{$token->[3]}) {
+	if ($attr!~/\W/) {
+	    my $val=$token->[2]->{$attr};
+	    $val =~ s/([\%\@\\\"\'])/\\$1/g;
+	    $val =~ s/(\$[^\{a-zA-Z_])/\\$1/g;
+	    $val =~ s/(\$)$/\\$1/;
+	    #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
+	    push(@vars,"\$$attr");
+	    push(@values,"\"$val\"");
+	}
     }
-  }
-  return $temp;
+    my $var_init = 
+	(@vars) ? 'my ('.join(',',@vars).') = ('.join(',',@values).');'
+	        : '';
+    return $var_init;
+}
+
+sub extlink {
+    my ($res,$exact)=@_;
+    if (!$exact) {
+	$res=&Apache::lonnet::hreflocation($Apache::lonxml::pwd[-1],$res);
+    }
+    push(@Apache::lonxml::extlinks,$res)	 
 }
 
 sub writeallows {
     unless ($#extlinks>=0) { return; }
-    my $thisurl='/res/'.&Apache::lonnet::declutter(shift);
-    if ($ENV{'httpref.'.$thisurl}) {
-	$thisurl=$ENV{'httpref.'.$thisurl};
+    my $thisurl = &Apache::lonnet::clutter(shift);
+    if ($env{'httpref.'.$thisurl}) {
+	$thisurl=$env{'httpref.'.$thisurl};
     }
     my $thisdir=$thisurl;
     $thisdir=~s/\/[^\/]+$//;
     my %httpref=();
     foreach (@extlinks) {
        $httpref{'httpref.'.
- 	        &Apache::lonnet::hreflocation($thisdir,$_)}=$thisurl;
+ 	        &Apache::lonnet::hreflocation($thisdir,&unescape($_))}=$thisurl;
     }
     @extlinks=();
     &Apache::lonnet::appenv(%httpref);
 }
 
+sub register_ssi {
+    my ($url,%form)=@_;
+    push (@Apache::lonxml::ssi_info,{'url'=>$url,'form'=>\%form});
+    return '';
+}
+
+sub do_registered_ssi {
+    foreach my $info (@Apache::lonxml::ssi_info) {
+	my %form=%{ $info->{'form'}};
+	my $url=$info->{'url'};
+	&Apache::lonnet::ssi($url,%form);
+    }
+}
+
+sub add_script_result {
+    my ($display) = @_;
+    push(@script_var_displays, $display);
+}
+
 #
 # Afterburner handles anchors, highlights and links
 #
@@ -1090,29 +1278,29 @@ sub afterburn {
     my $result=shift;
     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
 					    ['highlight','anchor','link']);
-    if ($ENV{'form.highlight'}) {
-       foreach (split(/\,/,$ENV{'form.highlight'})) {
+    if ($env{'form.highlight'}) {
+       foreach (split(/\,/,$env{'form.highlight'})) {
            my $anchorname=$_;
 	   my $matchthis=$anchorname;
            $matchthis=~s/\_+/\\s\+/g;
-           $result=~s/($matchthis)/\<font color=\"red\"\>$1\<\/font\>/gs;
+           $result=~s/(\Q$matchthis\E)/\<font color=\"red\"\>$1\<\/font\>/gs;
        }
     }
-    if ($ENV{'form.link'}) {
-       foreach (split(/\,/,$ENV{'form.link'})) {
+    if ($env{'form.link'}) {
+       foreach (split(/\,/,$env{'form.link'})) {
            my ($anchorname,$linkurl)=split(/\>/,$_);
 	   my $matchthis=$anchorname;
            $matchthis=~s/\_+/\\s\+/g;
-           $result=~s/($matchthis)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
+           $result=~s/(\Q$matchthis\E)/\<a href=\"$linkurl\"\>$1\<\/a\>/gs;
        }
     }
-    if ($ENV{'form.anchor'}) {
-        my $anchorname=$ENV{'form.anchor'};
+    if ($env{'form.anchor'}) {
+        my $anchorname=$env{'form.anchor'};
 	my $matchthis=$anchorname;
         $matchthis=~s/\_+/\\s\+/g;
-        $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
+        $result=~s/(\Q$matchthis\E)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
         $result.=(<<"ENDSCRIPT");
-<script>
+<script type="text/javascript">
     document.location.hash='$anchorname';
 </script>
 ENDSCRIPT
@@ -1122,78 +1310,155 @@ ENDSCRIPT
 
 sub storefile {
     my ($file,$contents)=@_;
+    &Apache::lonnet::correct_line_ends(\$contents);
     if (my $fh=Apache::File->new('>'.$file)) {
 	print $fh $contents;
         $fh->close();
+        return 1;
     } else {
-      &warning("Unable to save file $file");
+	&warning("Unable to save file $file");
+	return 0;
     }
 }
 
 sub createnewhtml {
-  my $filecontents=(<<SIMPLECONTENT);
+    my $title=&mt('Title of document goes here');
+    my $body=&mt('Body of document goes here');
+    my $filecontents=(<<SIMPLECONTENT);
 <html>
 <head>
-<title>
-                           Title of Document Goes Here
-</title>
+<title>$title</title>
 </head>
 <body bgcolor="#FFFFFF">
-
-                           Body of Document Goes Here
-
+$body
 </body>
 </html>
 SIMPLECONTENT
+    return $filecontents;
+}
+
+sub createnewsty {
+  my $filecontents=(<<SIMPLECONTENT);
+<definetag name="">
+    <render>
+       <web></web>
+       <tex></tex>
+    </render>
+</definetag>
+SIMPLECONTENT
   return $filecontents;
 }
 
 
 sub inserteditinfo {
-      my ($result,$filecontents)=@_;
-      $filecontents = &HTML::Entities::encode($filecontents);
+      my ($filecontents,$filetype)=@_;
+      $filecontents = &HTML::Entities::encode($filecontents,'<>&"');
 #      my $editheader='<a href="#editsection">Edit below</a><hr />';
+      my $xml_help = '';
+      my $initialize='';
+      my $textarea_id = 'filecont';
+      my ($add_to_onload, $add_to_onresize);
+      my $addbuttons=&Apache::lonhtmlcommon::htmlareaaddbuttons();
+      $initialize=&Apache::lonhtmlcommon::spellheader();
+      if ($filetype eq 'html' 
+	  && (!&Apache::lonhtmlcommon::htmlareablocked() &&
+	      &Apache::lonhtmlcommon::htmlareabrowser())) {
+	  $textarea_id .= '_htmlarea';
+	  $initialize.=(<<FULLPAGE);
+<script type="text/javascript">
+$addbuttons
+
+    HTMLArea.loadPlugin("FullPage");
+
+    function initDocument() {
+	var editor=new HTMLArea("filecont",config);
+	editor.registerPlugin(FullPage);
+	editor.generate();
+	setTimeout(
+		   function () {
+		       HTMLArea._addEvents(editor._doc,
+					   ["keypress","mousedown"], unClean);
+		       editor._iframe.id = '$textarea_id';
+		       resize_textarea('$textarea_id','LC_aftertextarea');
+		   },300);
+    }
+</script>
+FULLPAGE
+      } else {
+	  $initialize.=(<<FULLPAGE);
+<script type="text/javascript">
+$addbuttons
+    function initDocument() {
+	resize_textarea('$textarea_id','LC_aftertextarea');
+    }
+</script>
+FULLPAGE
+      }
+
+      $add_to_onload = 'initDocument();';
+      $add_to_onresize = "resize_textarea('$textarea_id','LC_aftertextarea');";
+
+      if ($filetype eq 'html') {
+	  $xml_help=&Apache::loncommon::helpLatexCheatsheet();
+      }
+
+      my $cleanbut = '';
+
+      my $titledisplay=&display_title();
+      my %lt=&Apache::lonlocal::texthash('st' => 'Save and Edit',
+					 'vi' => 'Save and View',
+					 'dv' => 'Discard Edits and View',
+					 'un' => 'undo',
+					 'ed' => 'Edit');
       my $buttons=(<<BUTTONS);
-<input type="submit" name="attemptclean" 
-       value="Save and then attempt to clean HTML" />
-<input type="submit" name="savethisfile" value="Save this" />
-<input type="submit" name="viewmode" value="View" />
+$cleanbut
+<input type="submit" name="discardview" accesskey="d"  value="$lt{'dv'}" />
+<input type="submit" name="Undo" accesskey="u"  value="$lt{'un'}" /><hr />
+<input type="submit" name="savethisfile" accesskey="s"  value="$lt{'st'}" />
+<input type="submit" name="viewmode" accesskey="v" value="$lt{'vi'}" />
 BUTTONS
+      $buttons.=&Apache::lonhtmlcommon::spelllink('xmledit','filecont');
+      my $textarea_events = &Apache::edit::element_change_detection();
+      my $form_events     = &Apache::edit::form_change_detection();
       my $editfooter=(<<ENDFOOTER);
+$initialize
 <hr />
 <a name="editsection" />
-<form method="post">
-<input type="hidden" name="editmode" value="Edit" />
+<form $form_events method="post" name="xmledit">
+$xml_help
+<input type="hidden" name="editmode" value="$lt{'ed'}" />
 $buttons<br />
-<textarea cols="80" rows="40" name="filecont">$filecontents</textarea>
+<textarea $textarea_events style="width:100%" cols="80" rows="44" name="filecont" id="filecont">$filecontents</textarea>
+<div id="LC_aftertextarea">
 <br />$buttons
 <br />
+$titledisplay
+</div>
 </form>
+</body>
 ENDFOOTER
-#      $result=~s/(\<body[^\>]*\>)/$1$editheader/is;
-      $result=~s/(\<\/body\>)/$editfooter/is;
-      return $result;
+      return ($editfooter,$add_to_onload,$add_to_onresize);;
 }
 
 sub get_target {
-  my $viewgrades=&Apache::lonnet::allowed('vgr',$ENV{'request.course.id'});
-  if ( $ENV{'request.state'} eq 'published') {
-    if ( defined($ENV{'form.grade_target'})
+  my $viewgrades=&Apache::lonnet::allowed('vgr',$env{'request.course.id'});
+  if ( $env{'request.state'} eq 'published') {
+    if ( defined($env{'form.grade_target'})
 	 && ($viewgrades == 'F' )) {
-      return ($ENV{'form.grade_target'});
-    } elsif (defined($ENV{'form.grade_target'})) {
-      if (($ENV{'form.grade_target'} eq 'web') ||
-	  ($ENV{'form.grade_target'} eq 'tex') ) {
-	return $ENV{'form.grade_target'}
+      return ($env{'form.grade_target'});
+    } elsif (defined($env{'form.grade_target'})) {
+      if (($env{'form.grade_target'} eq 'web') ||
+	  ($env{'form.grade_target'} eq 'tex') ) {
+	return $env{'form.grade_target'}
       } else {
 	return 'web';
       }
     } else {
       return 'web';
     }
-  } elsif ($ENV{'request.state'} eq 'construct') {
-    if ( defined($ENV{'form.grade_target'})) {
-      return ($ENV{'form.grade_target'});
+  } elsif ($env{'request.state'} eq 'construct') {
+    if ( defined($env{'form.grade_target'})) {
+      return ($env{'form.grade_target'});
     } else {
       return 'web';
     }
@@ -1203,221 +1468,481 @@ sub get_target {
 }
 
 sub handler {
-  my $request=shift;
-
-  my $target=&get_target();
-
-  $Apache::lonxml::debug=0;
-
-  if ($ENV{'browser.mathml'}) {
-    $request->content_type('text/xml');
-  } else {
-    $request->content_type('text/html');
-  }
-  &Apache::loncommon::no_cache($request);
-  $request->send_http_header;
-
-  return OK if $request->header_only;
-
-
-  my $file=&Apache::lonnet::filelocation("",$request->uri);
+    my $request=shift;
+    
+    my $target=&get_target();
+    
+    $Apache::lonxml::debug=$env{'user.debug'};
+    
+    &Apache::loncommon::content_type($request,'text/html');
+    &Apache::loncommon::no_cache($request);
+    if ($env{'request.state'} eq 'published') {
+	$request->set_last_modified(&Apache::lonnet::metadata($request->uri,
+							      'lastrevisiondate'));
+    }
+    $request->send_http_header;
+    
+    return OK if $request->header_only;
+
+
+    my $file=&Apache::lonnet::filelocation("",$request->uri);
+    my $filetype;
+    if ($file =~ /\.sty$/) {
+	$filetype='sty';
+    } else {
+	$filetype='html';
+    }
 #
 # Edit action? Save file.
 #
-  unless ($ENV{'request.state'} eq 'published') {
-      if (($ENV{'form.savethisfile'}) || ($ENV{'form.attemptclean'})) {
-	  &storefile($file,$ENV{'form.filecont'});
-      }
-  }
-  my %mystyle;
-  my $result = '';
-  my $filecontents=&Apache::lonnet::getfile($file);
-  if ($filecontents == -1) {
-    $result=(<<ENDNOTFOUND);
-<html>
-<head>
-<title>File not found</title>
-</head>
-<body bgcolor="#FFFFFF">
-<b>File not found: $file</b>
-</body>
-</html>
-ENDNOTFOUND
-    $filecontents='';
-    if ($ENV{'request.state'} ne 'published') {
-      $filecontents=&createnewhtml();
-      $ENV{'form.editmode'}='Edit'; #force edit mode
-    }
-  } else {
-    unless ($ENV{'request.state'} eq 'published') {
-      if ($ENV{'form.attemptclean'}) {
-	$filecontents=&htmlclean($filecontents,1);
-      }
+    if (!($env{'request.state'} eq 'published')) {
+	if ($env{'form.savethisfile'} || $env{'form.viewmode'} || $env{'form.Undo'}) {
+	    my $html_file=&Apache::lonnet::getfile($file);
+	    my $error = &Apache::lonhomework::handle_save_or_undo($request, \$html_file, \$env{'form.filecont'});
+	}
     }
-    if (!$ENV{'form.editmode'} || $ENV{'form.viewmode'}) {
-      $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
-					  '',%mystyle);
+    my %mystyle;
+    my $result = '';
+    my $filecontents=&Apache::lonnet::getfile($file);
+    if ($filecontents eq -1) {
+	my $start_page=&Apache::loncommon::start_page('File Error');
+	my $end_page=&Apache::loncommon::end_page();
+	my $fnf=&mt('File not found');
+	$result=(<<ENDNOTFOUND);
+$start_page
+<b>$fnf: $file</b>
+$end_page
+ENDNOTFOUND
+        $filecontents='';
+	if ($env{'request.state'} ne 'published') {
+	    if ($filetype eq 'sty') {
+		$filecontents=&createnewsty();
+	    } else {
+		$filecontents=&createnewhtml();
+	    }
+	    $env{'form.editmode'}='Edit'; #force edit mode
+	}
+    } else {
+	unless ($env{'request.state'} eq 'published') {
+	    if ($filecontents=~/BEGIN LON-CAPA Internal/) {
+		&Apache::lonxml::error(&mt('This file appears to be a rendering of a LON-CAPA resource. If this is correct, this resource will act very oddly and incorrectly.'));
+	    }
+#
+# we are in construction space, see if edit mode forced
+            &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
+						    ['editmode']);
+	}
+	if (!$env{'form.editmode'} || $env{'form.viewmode'} || $env{'form.discardview'}) {
+	    &Apache::structuretags::reset_problem_globals();
+	    $result = &Apache::lonxml::xmlparse($request,$target,$filecontents,
+						'',%mystyle);
+	    # .html files may contain <problem> or <Task> need to clean
+	    # up if it did
+	    &Apache::structuretags::reset_problem_globals();
+	    &Apache::lonhomework::finished_parsing();
+	    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
+						    ['rawmode']);
+	    if ($env{'form.rawmode'}) { $result = $filecontents; }
+	    if ($filetype eq 'sty') {
+		my $controls =
+		    ($env{'request.state'} eq 'construct') ? &Apache::londefdef::edit_controls()
+		                                           : '';
+		my %options = ('bgcolor' => '#FFFFFF');
+		$result = 
+		    &Apache::loncommon::start_page(undef,undef,\%options).
+		    $controls.
+		    $result.
+		    &Apache::loncommon::end_page();
+	    }
+	}
     }
-  }
 
 #
 # Edit action? Insert editing commands
 #
-  unless ($ENV{'request.state'} eq 'published') {
-    if ($ENV{'form.editmode'} && (!($ENV{'form.viewmode'}))) {
-	my $displayfile=$request->uri;
-        $displayfile=~s/^\/[^\/]*//;
-      $result='<html><body bgcolor="#FFFFFF"><h3>'.$displayfile.
-              '</h3></body></html>';
-      $result=&inserteditinfo($result,$filecontents);
+    unless ($env{'request.state'} eq 'published') {
+	if ($env{'form.editmode'} && (!($env{'form.viewmode'})) && (!($env{'form.discardview'})))
+	{
+	    my ($edit_info, $add_to_onload, $add_to_onresize)=
+		&inserteditinfo($filecontents,$filetype);
+
+	    my $displayfile=$request->uri;
+	    $displayfile=~s/^\/[^\/]*//;
+	    my %options = 
+		('add_entries' =>
+                   {'onresize' => $add_to_onresize,
+		    'onload'   => $add_to_onload,   });
+
+	    if ($env{'environment.remote'} ne 'off') {
+		$options{'bgcolor'}   = '#FFFFFF';
+		$options{'only_body'} = 1;
+	    }
+	    my $js =
+		&Apache::edit::js_change_detection().
+		&Apache::loncommon::resize_textarea_js();
+	    my $start_page = &Apache::loncommon::start_page(undef,$js,
+							    \%options);
+	    $result=$start_page.
+		&Apache::lonxml::message_location().'<h3>'.
+		$displayfile.
+		'</h3>'.
+		$edit_info.
+		&Apache::loncommon::end_page();
+	}
     }
-  }
-
-  writeallows($request->uri);
-
-  $request->print($result);
+    if ($filetype eq 'html') { &writeallows($request->uri); }
+    
+    &Apache::lonxml::add_messages(\$result);
+    $request->print($result);
+    
+    return OK;
+}
 
-  return OK;
+sub display_title {
+    my $result;
+    if ($env{'request.state'} eq 'construct') {
+	my $title=&Apache::lonnet::gettitle();
+	if (!defined($title) || $title eq '') {
+	    $title = $env{'request.filename'};
+	    $title = substr($title, rindex($title, '/') + 1);
+	}
+	$result = "<script type='text/javascript'>top.document.title = '$title - LON-CAPA Construction Space';</script>";
+    }
+    return $result;
 }
 
 sub debug {
-  if ($Apache::lonxml::debug eq 1) {
-    $|=1;
-    print("DEBUG:".&HTML::Entities::encode($_[0])."<br />\n");
-  }
+    if ($Apache::lonxml::debug eq "1") {
+	$|=1;
+	my $request=$Apache::lonxml::request;
+	if (!$request) {
+	    eval { $request=Apache->request; };
+	}
+	if (!$request) {
+	    eval { $request=Apache2::RequestUtil->request; };
+	}
+	$request->print('<font size="-2"><pre>DEBUG:'.&HTML::Entities::encode($_[0],'<>&"')."</pre></font>\n");
+	#&Apache::lonnet::logthis($_[0]);
+    }
+}
+
+sub show_error_warn_msg {
+    if ($env{'request.filename'} eq '/home/httpd/html/res/lib/templates/simpleproblem.problem' &&
+	&Apache::lonnet::allowed('mdc',$env{'request.course.id'})) {
+	return 1;
+    }
+    return (($Apache::lonxml::debug eq 1) ||
+	    ($env{'request.state'} eq 'construct') ||
+	    ($Apache::lonhomework::browse eq 'F'
+	     &&
+	     $env{'form.show_errors'} eq 'on'));
 }
 
 sub error {
-  if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
-    # If printing in construction space, put the error inside <pre></pre>
-    print "<b>ERROR:</b>".join("\n",@_)."\n";
-  } else {
-    print "<b>An Error occured while processing this resource. The instructor has been notified.</b> <br />";
-    #notify author
-    &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
-    #notify course
-    if ( $ENV{'request.course.id'} ) {
-      my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
-      my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
-      foreach my $user (split /\,/, $users) {
-	($user,my $domain) = split /:/, $user;
-	&Apache::lonmsg::user_normal_msg($user,$domain,
-        "Error [$declutter]",join('<br />',@_));
-      }
+    my @errors = @_;
+
+    $errorcount++;
+
+    if (defined($Apache::inputtags::part)) {
+	if ( @Apache::inputtags::response ) {
+	    push(@errors,
+		 &mt("This error occurred while processing response [_1] in part [_2]",
+		     $Apache::inputtags::response[-1],
+		     $Apache::inputtags::part));
+	} else {
+	    push(@errors,
+		 &mt("This error occurred while processing part [_1]",
+		     $Apache::inputtags::part));
+	}
     }
 
-    #FIXME probably shouldn't have me get everything forever.
-    &Apache::lonmsg::user_normal_msg('albertel','msu',"Error in $ENV{'request.filename'}",join('<br />',@_));
-    #&Apache::lonmsg::user_normal_msg('albertel','103',"Error in $ENV{'request.filename'}",$_[0]);
-  }
+    if ( &show_error_warn_msg() ) {
+	# If printing in construction space, put the error inside <pre></pre>
+	push(@Apache::lonxml::error_messages,
+	     $Apache::lonxml::warnings_error_header.
+	     "<b>ERROR:</b>".join("<br />\n",@errors)."<br />\n");
+	$Apache::lonxml::warnings_error_header='';
+    } else {
+	my $errormsg;
+	my ($symb)=&Apache::lonnet::symbread();
+	if ( !$symb ) {
+	    #public or browsers
+	    $errormsg=&mt("An error occured while processing this resource. The author has been notified.");
+	}
+	my $host=$Apache::lonnet::perlvar{'lonHostID'};
+	push(@errors, "The error occurred on host <tt>$host</tt>");
+
+	my $msg = join('<br />', @errors);
+
+	#notify author
+	&Apache::lonmsg::author_res_msg($env{'request.filename'},$msg);
+	#notify course
+	if ( $symb && $env{'request.course.id'} ) {
+	    my $cnum=$env{'course.'.$env{'request.course.id'}.'.num'};
+	    my $cdom=$env{'course.'.$env{'request.course.id'}.'.domain'};
+	    my (undef,%users)=&Apache::lonmsg::decide_receiver(undef,0,1,1,1);
+	    my $declutter=&Apache::lonnet::declutter($env{'request.filename'});
+            my $baseurl = &Apache::lonnet::clutter($declutter);
+	    my @userlist;
+	    foreach (keys %users) {
+		my ($user,$domain) = split(/:/, $_);
+		push(@userlist,"$user\@$domain");
+		my $key=$declutter.'_'.$user.'_'.$domain;
+		my %lastnotified=&Apache::lonnet::get('nohist_xmlerrornotifications',
+						      [$key],
+						      $cdom,$cnum);
+		my $now=time;
+		if ($now-$lastnotified{$key}>86400) {
+                    my $title = &Apache::lonnet::gettitle($symb);
+                    my $sentmessage;
+		    &Apache::lonmsg::user_normal_msg($user,$domain,
+		        "Error [$title]",$msg,'',$baseurl,'','',
+                        \$sentmessage,$symb,$title,1);
+		    &Apache::lonnet::put('nohist_xmlerrornotifications',
+					 {$key => $now},
+					 $cdom,$cnum);		
+		}
+	    }
+	    if ($env{'request.role.adv'}) {
+		$errormsg=&mt("An error occured while processing this resource. The course personnel ([_1]) and the author have been notified.",join(', ',@userlist));
+	    } else {
+		$errormsg=&mt("An error occured while processing this resource. The instructor has been notified.");
+	    }
+	}
+	push(@Apache::lonxml::error_messages,"<b>$errormsg</b> <br />");
+    }
 }
 
 sub warning {
-  if ($ENV{'request.state'} eq 'construct') {
-    print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
-  }
+    $warningcount++;
+  
+    if ($env{'form.grade_target'} ne 'tex') {
+	if ( &show_error_warn_msg() ) {
+	    push(@Apache::lonxml::warning_messages,
+		 $Apache::lonxml::warnings_error_header.
+		 "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n");
+	    $Apache::lonxml::warnings_error_header='';
+	}
+    }
+}
+
+sub info {
+    if ($env{'form.grade_target'} ne 'tex' 
+	&& $env{'request.state'} eq 'construct') {
+	push(@Apache::lonxml::info_messages,join('<br />',@_)."<br />\n");
+    }
+}
+
+sub message_location {
+    return '__LONCAPA_INTERNAL_MESSAGE_LOCATION__';
+}
+
+sub add_messages {
+    my ($msg)=@_;
+    my $result=join(' ',
+		    @Apache::lonxml::info_messages,
+		    @Apache::lonxml::error_messages,
+		    @Apache::lonxml::warning_messages);
+    undef(@Apache::lonxml::info_messages);
+    undef(@Apache::lonxml::error_messages);
+    undef(@Apache::lonxml::warning_messages);
+    $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__/$result/;
+    $$msg=~s/__LONCAPA_INTERNAL_MESSAGE_LOCATION__//g;
 }
 
 sub get_param {
-  my ($param,$parstack,$safeeval,$context) = @_;
-  if ( ! $context ) { $context = -1; }
-  my $args ='';
-  if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
-  if ( ! $args ) { return undef; }
-  if ( $args =~ /my \$$param=\"/ ) {
-    return &Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
-  } else {
-    return undef;
-  }
+    my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
+    if ( ! $context ) { $context = -1; }
+    my $args ='';
+    if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
+    if ( ! $Apache::lonxml::usestyle ) {
+	$args=$Apache::lonxml::style_values.$args;
+    }
+    if ( ! $args ) { return undef; }
+    if ( $case_insensitive ) {
+	if ($args =~ s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei) {
+	    return &Apache::run::run("{$args;".'return $'.$param.'}',
+                                     $safeeval); #'
+	} else {
+	    return undef;
+	}
+    } else {
+	if ( $args =~ /my .*\$\Q$param\E[,\)]/ ) {
+	    return &Apache::run::run("{$args;".'return $'.$param.'}',
+                                     $safeeval); #'
+	} else {
+	    return undef;
+	}
+    }
 }
 
 sub get_param_var {
-  my ($param,$parstack,$safeeval,$context) = @_;
+  my ($param,$parstack,$safeeval,$context,$case_insensitive) = @_;
   if ( ! $context ) { $context = -1; }
   my $args ='';
   if ( $#$parstack > (-2-$context) ) { $args=$$parstack[$context]; }
-  if ( $args !~ /my \$$param=\"/ ) { return undef; }
+  if ( ! $Apache::lonxml::usestyle ) {
+      $args=$Apache::lonxml::style_values.$args;
+  }
+  &Apache::lonxml::debug("Args are $args param is $param");
+  if ($case_insensitive) {
+      if (! ($args=~s/(my (?:.*))(\$\Q$param\E[,\)])/$1.lc($2)/ei)) {
+	  return undef;
+      }
+  } elsif ( $args !~ /my .*\$\Q$param\E[,\)]/ ) { return undef; }
   my $value=&Apache::run::run("{$args;".'return $'.$param.'}',$safeeval); #'
-  if ($value =~ /^[\$\@\%]/) {
-    return &Apache::run::run("return $value",$safeeval,1);
+  &Apache::lonxml::debug("first run is $value");
+  if ($value =~ /^[\$\@\%][a-zA-Z_]\w*$/) {
+      &Apache::lonxml::debug("doing second");
+      my @result=&Apache::run::run("return $value",$safeeval,1);
+      if (!defined($result[0])) {
+	  return $value
+      } else {
+	  if (wantarray) { return @result; } else { return $result[0]; }
+      }
   } else {
     return $value;
   }
 }
 
-sub register_insert {
-  my @data = split /\n/, &Apache::lonnet::getfile('/home/httpd/lonTabs/insertlist.tab');
-  my $i;
-  my $tagnum=0;
-  my @order;
-  for ($i=0;$i < $#data; $i++) {
-    my $line = $data[$i];
-    if ( $line =~ /^\#/ || $line =~ /^\s*\n/) { next; }
-    if ( $line =~ /TABLE/ ) { last; }
-    my ($tag,$descrip,$color,$function,$show) = split(/,/, $line);
-    if ($tag) {
-      $insertlist{"$tagnum.tag"} = $tag;
-      $insertlist{"$tagnum.description"} = $descrip;
-      $insertlist{"$tagnum.color"} = $color;
-      $insertlist{"$tagnum.function"} = $function;
-      if (!defined($show)) { $show='yes'; }
-      $insertlist{"$tagnum.show"}= $show;
-      $insertlist{"$tag.num"}=$tagnum;
-      $tagnum++;
+sub register_insert_xml {
+    my $parser = HTML::LCParser->new($Apache::lonnet::perlvar{'lonTabDir'}
+				     .'/insertlist.xml');
+    my ($tagnum,$in_help)=(0,0);
+    my @alltags;
+    my $tag;
+    while (my $token = $parser->get_token()) {
+	if ($token->[0] eq 'S') {
+	    my $key;
+	    if      ($token->[1] eq 'tag') {
+		$tag = $token->[2]{'name'};
+		$insertlist{"$tagnum.tag"} = $tag;
+		$insertlist{"$tag.num"}   = $tagnum;
+		push(@alltags,$tag);
+	    } elsif ($in_help && $token->[1] eq 'file') {
+		$key = $tag.'.helpfile';
+	    } elsif ($in_help && $token->[1] eq 'description') {
+		$key = $tag.'.helpdesc';
+	    } elsif ($token->[1] eq 'description' ||
+		     $token->[1] eq 'color'       ||
+		     $token->[1] eq 'show'          ) {
+		$key = $tag.'.'.$token->[1];
+	    } elsif ($token->[1] eq 'insert_sub') {
+		$key = $tag.'.function';
+	    } elsif ($token->[1] eq 'help') {
+		$in_help=1;
+	    } elsif ($token->[1] eq 'allow') {
+		$key = $tag.'.allow';
+	    }
+	    if (defined($key)) {
+		$insertlist{$key} = $parser->get_text();
+		$insertlist{$key} =~ s/(^\s*|\s*$ )//gx;
+	    }
+	} elsif ($token->[0] eq 'E') {
+	    if      ($token->[1] eq 'tag') {
+		undef($tag);
+		$tagnum++;
+	    } elsif ($token->[1] eq 'help') {
+		undef($in_help);
+	    }
+	}
     }
-  }
-  $i++; #skipping TABLE line
-  $tagnum = 0;
-  for (;$i < $#data;$i++) {
-    my $line = $data[$i];
-    my ($mnemonic,@which) = split(/ +/,$line);
-    my $tag = $insertlist{"$tagnum.tag"};
-    for (my $j=0;$j <=$#which;$j++) {
-      if ( $which[$j] eq 'Y' ) {
-	if ($insertlist{"$j.show"} ne 'no') {
-	  push(@{ $insertlist{"$tag.which"} },$j);
+    
+    # parse the allows and ignore tags set to <show>no</show>
+    foreach my $tag (@alltags) {	
+        next if (!exists($insertlist{"$tag.allow"}));
+	my $allow =  $insertlist{"$tag.allow"};
+       	foreach my $element (split(',',$allow)) {
+	    $element =~ s/(^\s*|\s*$ )//gx;
+	    if (!exists($insertlist{"$element.show"})
+                || $insertlist{"$element.show"} ne 'no') {
+		push(@{ $insertlist{$tag.'.which'} },$element);
+	    }
 	}
-      }
     }
-    $tagnum++;
-  }
+}
+
+sub register_insert {
+    return &register_insert_xml(@_);
+#    &dump_insertlist('2');
+}
+
+sub dump_insertlist {
+    my ($ext) = @_;
+    open(XML,">/tmp/insertlist.xml.$ext");
+    print XML ("<insertlist>");
+    my $i=0;
+
+    while (exists($insertlist{"$i.tag"})) {
+	my $tag = $insertlist{"$i.tag"};
+	print XML ("
+\t<tag name=\"$tag\">");
+	if (defined($insertlist{"$tag.description"})) {
+	    print XML ("
+\t\t<description>".$insertlist{"$tag.description"}."</description>");
+	}
+	if (defined($insertlist{"$tag.color"})) {
+	    print XML ("
+\t\t<color>".$insertlist{"$tag.color"}."</color>");
+	}
+	if (defined($insertlist{"$tag.function"})) {
+	    print XML ("
+\t\t<insert_sub>".$insertlist{"$tag.function"}."</insert_sub>");
+	}
+	if (defined($insertlist{"$tag.show"})
+	    && $insertlist{"$tag.show"} ne 'yes') {
+	    print XML ("
+\t\t<show>".$insertlist{"$tag.show"}."</show>");
+	}
+	if (defined($insertlist{"$tag.helpfile"})) {
+	    print XML ("
+\t\t<help>
+\t\t\t<file>".$insertlist{"$tag.helpfile"}."</file>");
+	    if ($insertlist{"$tag.helpdesc"} ne '') {
+		print XML ("
+\t\t\t<description>".$insertlist{"$tag.helpdesc"}."</description>");
+	    }
+	    print XML ("
+\t\t</help>");
+	}
+	if (defined($insertlist{"$tag.which"})) {
+	    print XML ("
+\t\t<allow>".join(',',sort(@{ $insertlist{"$tag.which"} }))."</allow>");
+	}
+	print XML ("
+\t</tag>");
+	$i++;
+    }
+    print XML ("\n</insertlist>\n");
+    close(XML);
 }
 
 sub description {
-  my ($token)=@_;
-  my $tagnum;
-  my $tag=$token->[1];
-  foreach my $namespace (reverse @Apache::lonxml::namespace) {
-    my $testtag=$namespace.'::'.$tag;
-    $tagnum=$insertlist{"$testtag.num"};
-    if (defined($tagnum)) { last; }
-  }
-  if (!defined ($tagnum)) { $tagnum=$Apache::lonxml::insertlist{"$tag.num"}; }
-  return $insertlist{$tagnum.'.description'};
+    my ($token)=@_;
+    my $tag = &get_tag($token);
+    return $insertlist{$tag.'.description'};
+}
+
+# Returns a list containing the help file, and the description
+sub helpinfo {
+    my ($token)=@_;
+    my $tag = &get_tag($token);
+    return ($insertlist{$tag.'.helpfile'}, $insertlist{$tag.'.helpdesc'});
 }
 
-# ----------------------------------------------------------------- whichuser
-# returns a list of $symb, $courseid, $domain, $name that is correct for
-# calls to lonnet functions for this setup.
-# - looks for form.grade_ parameters
-sub whichuser {
-  my ($symb,$courseid,$domain,$name);
-  if (defined($ENV{'form.grade_symb'})) {
-    my $tmp_courseid=$ENV{'form.grade_courseid'};
-    my $allowed=&Apache::lonnet::allowed('mgr',$tmp_courseid);
-    if ($allowed) {
-      $symb=$ENV{'form.grade_symb'};
-      $courseid=$ENV{'form.grade_courseid'};
-      $domain=$ENV{'form.grade_domain'};
-      $name=$ENV{'form.grade_username'};
+sub get_tag {
+    my ($token)=@_;
+    my $tagnum;
+    my $tag=$token->[1];
+    foreach my $namespace (reverse(@Apache::lonxml::namespace)) {
+	my $testtag = $namespace.'::'.$tag;
+	$tagnum = $insertlist{"$testtag.num"};
+	last if (defined($tagnum));
     }
-  } else {
-    $symb=&Apache::lonnet::symbread();
-    $courseid=$ENV{'request.course.id'};
-    $domain=$ENV{'user.domain'};
-    $name=$ENV{'user.name'};
-  }
-  return ($symb,$courseid,$domain,$name);
+    if (!defined($tagnum)) {
+	$tagnum = $Apache::lonxml::insertlist{"$tag.num"};
+    }
+    return $insertlist{"$tagnum.tag"};
 }
 
 1;