--- loncom/xml/lonxml.pm	2002/09/11 13:36:50	1.195
+++ loncom/xml/lonxml.pm	2003/02/17 20:10:08	1.235
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # XML Parser Module 
 #
-# $Id: lonxml.pm,v 1.195 2002/09/11 13:36:50 www Exp $
+# $Id: lonxml.pm,v 1.235 2003/02/17 20:10:08 sakharuk Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -41,7 +41,6 @@
 # 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
@@ -60,7 +59,7 @@
 
 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 $prevent_entity_encode $errorcount $warningcount);
 use strict;
 use HTML::LCParser();
 use HTML::TreeBuilder();
@@ -99,11 +98,18 @@ use Apache::edit();
 use Apache::lonnet();
 use Apache::File();
 use Apache::loncommon();
+use Apache::lonfeedback();
+use Apache::lonmsg();
+use Apache::loncacc();
 
 #==================================================   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=();
 
@@ -138,6 +144,13 @@ $Apache::lonxml::registered=0;
 # a pointer the the Apache request object
 $Apache::lonxml::request='';
 
+# a problem number counter, and check on ether it is used
+$Apache::lonxml::counter=4;
+$Apache::lonxml::counter_changed=0;
+
+#internal check on whether to look at style defs
+$Apache::lonxml::usestyle=1;
+
 sub xmlbegin {
   my $output='';
   if ($ENV{'browser.mathml'}) {
@@ -178,7 +191,8 @@ sub xmlend {
               my $idx;
               for ($idx=1;$idx<=$contrib{'version'};$idx++) {
 		my $hidden=($contrib{'hidden'}=~/\.$idx\./);
-		unless (($hidden) && (!$seeid)) {
+		my $deleted=($contrib{'deleted'}=~/\.$idx\./);
+		unless ((($hidden) && (!$seeid)) || ($deleted)) {
                  my $message=$contrib{$idx.':message'};
                  $message=~s/\n/\<br \/\>/g;
 		 $message=&Apache::lontexconvert::msgtexconverted($message);
@@ -186,17 +200,24 @@ sub xmlend {
                   if ($hidden) {
 		      $message='<font color="#888888">'.$message.'</font>';
                   }
+                  my $screenname=&Apache::loncommon::screenname(
+                               $contrib{$idx.':sendername'},
+			       $contrib{$idx.':senderdomain'});
+                  my $plainname=&Apache::loncommon::nickname(
+                               $contrib{$idx.':sendername'},
+			       $contrib{$idx.':senderdomain'});
+
                   my $sender='Anonymous';
                   if ((!$contrib{$idx.':anonymous'}) || ($seeid)) {
                       $sender=&Apache::loncommon::aboutmewrapper(
-                               $contrib{$idx.':plainname'},
+                               $plainname,
                                $contrib{$idx.':sendername'},
                                $contrib{$idx.':senderdomain'}).' ('.
                               $contrib{$idx.':sendername'}.' at '.
 		      $contrib{$idx.':senderdomain'}.')';
                       if ($contrib{$idx.':anonymous'}) {
 			  $sender.=' [anonymous] '.
-                                     $contrib{$idx.':screenname'};
+                                     $screenname;
                       }
                       if ($seeid) {
 			  if ($hidden) {
@@ -205,11 +226,13 @@ sub xmlend {
                           } else {
                              $sender.=' <a href="/adm/feedback?hide='.
 				 $symb.':::'.$idx.'">Hide</a>';
-			  }
-                      }                   
+			  }                     
+                          $sender.=' <a href="/adm/feedback?deldisc='.
+				 $symb.':::'.$idx.'">Delete</a>';
+                      }
                   } else {
-                      if ($contrib{$idx.':screenname'}) {
-			  $sender='<i>'.$contrib{$idx.':screenname'}.'</i>';
+                      if ($screenname) {
+			  $sender='<i>'.$screenname.'</i>';
                       }
                   }
 		  $discussion.='<p><b>'.$sender.'</b> ('.
@@ -225,7 +248,7 @@ sub xmlend {
           }
           if ($discussiononly) {
 	      $discussion.=(<<ENDDISCUSS);
-<form action="/adm/feedback" method="post">
+<form action="/adm/feedback" method="post" name="mailform">
 <input type="submit" name="discuss" value="Post Discussion" />
 <input type="submit" name="anondiscuss" value="Post Anonymous Discussion" />
 <input type="hidden" name="symb" value="$symb" />
@@ -236,6 +259,7 @@ course faculty</font><br />
 <textarea name=comment cols=60 rows=10 wrap=hard></textarea>
 </form>
 ENDDISCUSS
+             $discussion.=&Apache::lonfeedback::generate_preview_button();
           }
        }
     }
@@ -246,7 +270,7 @@ sub tokeninputfield {
     my $defhost=$Apache::lonnet::perlvar{'lonHostID'};
     $defhost=~tr/a-z/A-Z/;
     return (<<ENDINPUTFIELD)
-<script>
+<script type="text/javascript">
     function updatetoken() {
 	var comp=new Array;
         var barcode=unescape(document.tokeninput.barcode.value);
@@ -330,7 +354,7 @@ sub printtokenheader {
     if ($target eq 'web') {
         my %idhash=&Apache::lonnet::idrget($tudom,($tuname));
 	return 
- '<img align="right" src="/cgi-bin/barcode.gif?encode='.$token.'" />'.
+ '<img align="right" src="/cgi-bin/barcode.png?encode='.$token.'" />'.
                'Checked out for '.$plainname.
                '<br />User: '.$tuname.' at '.$tudom.
 	       '<br />ID: '.$idhash{$tuname}.
@@ -352,142 +376,6 @@ sub fontsettings() {
     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 $temp (sort keys %Apache::lonxml::alltags) {
@@ -500,11 +388,14 @@ sub xmlparse {
  my ($request,$target,$content_file_string,$safeinit,%style_for_target) = @_;
 
  &setup_globals($request,$target);
+ &Apache::inputtags::initialize_inputtags();
+ &Apache::outputtags::initialize_outputtags();
+ &Apache::edit::initialize_edit();
 #
 # 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'};
      if ($bodytext) {
@@ -539,6 +430,7 @@ sub xmlparse {
  if ($ENV{'request.uri'}) {
     &writeallows($ENV{'request.uri'});
  }
+ if ($Apache::lonxml::counter_changed) { &store_counter() }
  return $finaloutput;
 }
 
@@ -564,18 +456,30 @@ sub htmlclean {
 }
 
 sub latex_special_symbols {
-    my ($current_token,$stack,$parstack)=@_;
-    $current_token=~s/\\/\\char92 /g;
-    $current_token=~s/\^/\\char94 /g;
-    $current_token=~s/\~/\\char126 /g;
-    $current_token=~s/(&[^a-z#])/\\$1/g;
-    $current_token=~s/([^&]\#)/\\$1/g;
-    $current_token=~s/(\$|_|{|})/\\$1/g;
-    $current_token=~s/\\char92 /\\texttt{\\char92}/g;
-    $current_token=~s/>/\$>\$/g; #more
-    $current_token=~s/</\$<\$/g; #less
-    if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
-    if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
+    my ($current_token,$stack,$parstack,$where)=@_;
+    if ($where eq 'header') {
+      $current_token =~ s/\\/ /g;
+      $current_token =~ s/\{/\\\{/g;
+      $current_token =~ s/\}/\\\}/g;
+      $current_token =~ s/_/ /g;
+      $current_token =~ s/\^/ /g;
+      $current_token =~ s/&/\\&/g;
+      $current_token =~ s/\#/\\\#/g;
+      $current_token =~ s/%/\\%/g;
+      $current_token =~ s/\$/\\\$/g;
+    } else {
+     $current_token=~s/\\ /\\char92 /g;
+     $current_token=~s/\^/\\char94 /g;
+     $current_token=~s/\~/\\char126 /g;
+     $current_token=~s/(&[^a-z\#])/\\$1/g;
+     $current_token=~s/([^&])\#/$1\\#/g;
+     $current_token=~s/(\$|_|{|})/\\$1/g;
+     $current_token=~s/\\char92 /\\texttt{\\char92}/g;
+     $current_token=~s/>/\$>\$/g; #more
+     $current_token=~s/</\$<\$/g; #less
+     if ($current_token=~m/\d%/) {$current_token =~ s/(\d)%/$1\\%/g;} #percent after digit
+     if ($current_token=~m/\s%/) {$current_token =~ s/(\s)%/$1\\%/g;} #persent after space
+    }
     return $current_token;
 }
 
@@ -590,8 +494,7 @@ sub inner_xmlparse {
 	if ($metamode<1) {
 	    my $text=$token->[1];
 	    if ($token->[0] eq 'C' && $target eq 'tex') {
-		$text = '%'.$text;
-		$text =~ s/[\n\r]//g;
+		$text = '%'.$text."\n";
 	    }
 	    $result.=$text;
 	}
@@ -605,15 +508,12 @@ 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);
 	} else {
 	  $result = &callsub("start_$token->[1]", $target, $token, $stack,
 			     $parstack, $pars, $safeeval, $style_for_target);
@@ -631,16 +531,12 @@ sub inner_xmlparse {
 	  }
 	}
 
-	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);
 	} else {
 	  $result = &callsub("end_$token->[1]", $target, $token, $stack,
 			     $parstack, $pars,$safeeval, $style_for_target);
@@ -676,9 +572,11 @@ sub inner_xmlparse {
       if ($token->[0] eq 'E') { 
 	&end_tag($stack,$parstack,$token);
       }
+    }	
+    if ($#$pars > -1) {
+	pop @$pars;
+	pop @Apache::lonxml::pwd;
     }
-    pop @$pars;
-    pop @Apache::lonxml::pwd;
   }
 
   # if ($target eq 'meta') {
@@ -688,82 +586,10 @@ sub inner_xmlparse {
 
   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 $output;
-}
-
 sub callsub {
   my ($sub,$target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   my $currentstring='';
@@ -788,13 +614,13 @@ sub callsub {
     }
     if (!$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");
+	#&Apache::lonxml::debug("NOT Calling sub $sub in $space $metamode");
 	if ($metamode <1) {
 	  if (defined($token->[4]) && ($metamode < 1)) {
 	    $currentstring = $token->[4];
@@ -806,7 +632,7 @@ sub callsub {
       #    &Apache::lonxml::debug("nodefalt:$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') {
@@ -816,6 +642,9 @@ sub callsub {
 	  if ($token->[0] eq 'S') {
 	    $currentstring = $token->[4];
 	    $currentstring.=&Apache::edit::handle_insert();
+	  } elsif ($token->[0] eq 'E') {
+	    $currentstring = $token->[2];
+            $currentstring.=&Apache::edit::handle_insertafter($token->[1]);
 	  } else {
 	    $currentstring = $token->[2];
 	  }
@@ -831,6 +660,11 @@ sub setup_globals {
   my ($request,$target)=@_;
   $Apache::lonxml::request=$request;
   $Apache::lonxml::registered = 0;
+  $errorcount=0;
+  $warningcount=0;
+  $Apache::lonxml::default_homework_loaded=0;
+  $Apache::lonxml::usestyle=1;
+  &init_counter();
   @Apache::lonxml::pwd=();
   @Apache::lonxml::extlinks=();
   if ($target eq 'meta') {
@@ -899,6 +733,37 @@ 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');
+
+#  $safehole->wrap(\&Math::Cephes::new_fract,$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');
@@ -931,6 +796,18 @@ sub init_safespace {
   &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 == -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;
+    }
+}
+
 sub startredirection {
   $Apache::lonxml::redirection++;
   push (@Apache::lonxml::outputstack, '');
@@ -1002,7 +879,7 @@ sub get_all_text_unbalanced {
    } elsif ($token->[0] eq 'E')  {
      $result.=$token->[2];
    }
-   if ($result =~ /(.*)$tag(.*)/) {
+   if ($result =~ /(.*)\Q$tag\E(.*)/s) {
      &Apache::lonxml::debug('Got a winner with leftovers ::'.$2);
      &Apache::lonxml::debug('Result is :'.$1);
      $result=$1;
@@ -1014,50 +891,103 @@ sub get_all_text_unbalanced {
  return $result
 }
 
+sub increment_counter {
+    $Apache::lonxml::counter++;
+    $Apache::lonxml::counter_changed=1;
+}
+
+sub init_counter {
+    if (defined($ENV{'form.counter'})) {
+	$Apache::lonxml::counter=$ENV{'form.counter'};
+    } elsif (not defined($Apache::lonxml::counter)) {
+	$Apache::lonxml::counter=1;
+	&store_counter();
+    }
+    $Apache::lonxml::counter_changed=0;
+}
+
+sub store_counter {
+    &Apache::lonnet::appenv(('form.counter' => $Apache::lonxml::counter));
+    return '';
+}
+
 sub get_all_text {
  my($tag,$pars)= @_;
+ &Apache::lonxml::debug("Got a ".ref($pars));
+ my $gotfullstack=1;
+ if (ref($pars) ne 'ARRAY') {
+     $gotfullstack=0;
+     $pars=[$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);
+   #&Apache::lonxml::debug("have:$tag:");
+   my $top_empty=0;
+   while (($depth >=0) && ($#$pars > -1) && (!$top_empty)) {
+     while (($depth >=0) && ($token = $$pars[-1]->get_token)) {
+       #&Apache::lonxml::debug("e token:$token->[0]:$depth:$token->[1]:".$#$pars.":".$#Apache::lonxml::pwd);
+       if (($token->[0] eq 'T')||($token->[0] eq 'C')||($token->[0] eq 'D')) {
+	 $result.=$token->[1];
+       } elsif ($token->[0] eq 'PI') {
+	 $result.=$token->[2];
+       } elsif ($token->[0] eq 'S') {
+	 if ($token->[1] =~ /^$tag$/i) { $depth++; }
+	 $result.=$token->[4];
+       } elsif ($token->[0] eq 'E')  {
+	 if ( $token->[1] =~ /^$tag$/i) { $depth--; }
+	 #skip sending back the last end tag
+	 if ($depth > -1) { $result.=$token->[2]; } else {
+	   $$pars[-1]->unget_token($token);
+	 }
        }
      }
+     if (($depth >=0) && ($#$pars == 0) ) { $top_empty=1; }
+     if (($depth >=0) && ($#$pars > 0) ) {
+       pop(@$pars);
+       pop(@Apache::lonxml::pwd);
+     }
    }
- } else {
-   while ($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];
+   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;');
+       if ($gotfullstack) {
+	   my $newstring='</'.$tag.'>'.$result;
+	   &Apache::lonxml::newparser($pars,\$newstring);
        }
-     } elsif ($token->[0] eq 'E')  {
-       $result.=$token->[2];
-     }
+       $result='';
    }
+ } else {
+     while ($#$pars > -1) {
+	 while ($token = $$pars[-1]->get_token) {
+	     #&Apache::lonxml::debug("s token:$token->[0]:$depth:$token->[1]");
+	     if (($token->[0] eq 'T')||($token->[0] eq 'C')||
+		 ($token->[0] eq 'D')) {
+		 $result.=$token->[1];
+	     } elsif ($token->[0] eq 'PI') {
+		 $result.=$token->[2];
+	     } elsif ($token->[0] eq 'S') {
+		 if ( $token->[1] =~ /^$tag$/i) {
+		     $$pars[-1]->unget_token($token); last;
+		 } else {
+		     $result.=$token->[4];
+		 }
+	     } elsif ($token->[0] eq 'E')  {
+		 $result.=$token->[2];
+	     }
+	 }
+	 if (($#$pars > 0) ) {
+	     pop(@$pars);
+	     pop(@Apache::lonxml::pwd);
+	 } else { last; }
+     }
  }
-# &Apache::lonxml::debug("Exit:$result:");
+ if ($result =~ m|<LONCAPA_INTERNAL_TURN_STYLE_ON />|) {
+     $Apache::lonxml::usestyle=1;
+ }
+ #&Apache::lonxml::debug("Exit:$result:");
  return $result
 }
 
@@ -1080,7 +1010,7 @@ sub parstring {
   foreach (@{$token->[3]}) {
     unless ($_=~/\W/) {
       my $val=$token->[2]->{$_};
-      $val =~ s/([\%\@\\\"])/\\$1/g;
+      $val =~ s/([\%\@\\\"\'])/\\$1/g;
       #if ($val =~ m/^[\%\@]/) { $val="\\".$val; }
       $temp .= "my \$$_=\"$val\";"
     }
@@ -1134,7 +1064,7 @@ sub afterburn {
         $matchthis=~s/\_+/\\s\+/g;
         $result=~s/($matchthis)/\<a name=\"$anchorname\"\>$1\<\/a\>/s;
         $result.=(<<"ENDSCRIPT");
-<script>
+<script type="text/javascript">
     document.location.hash='$anchorname';
 </script>
 ENDSCRIPT
@@ -1305,11 +1235,12 @@ ENDNOTFOUND
 sub debug {
   if ($Apache::lonxml::debug eq 1) {
     $|=1;
-    print("DEBUG:".&HTML::Entities::encode($_[0])."<br />\n");
+    print('<font size="-2"<pre>DEBUG:'.&HTML::Entities::encode($_[0])."</pre></font>\n");
   }
 }
 
 sub error {
+  $errorcount++;
   if (($Apache::lonxml::debug eq 1) || ($ENV{'request.state'} eq 'construct') ) {
     # If printing in construction space, put the error inside <pre></pre>
     print "<b>ERROR:</b>".join("\n",@_)."\n";
@@ -1319,10 +1250,10 @@ sub error {
     &Apache::lonmsg::author_res_msg($ENV{'request.filename'},join('<br />',@_));
     #notify course
     if ( $ENV{'request.course.id'} ) {
-      my $users=$ENV{'course.'.$ENV{'request.course.id'}.'.comment.email'};
+      my (undef,%users)=&Apache::lonfeedback::decide_receiver(undef,0,1,1,1);
       my $declutter=&Apache::lonnet::declutter($ENV{'request.filename'});
-      foreach my $user (split /\,/, $users) {
-	($user,my $domain) = split /:/, $user;
+      foreach (keys %users) {
+	my ($user,$domain) = split(/:/, $_);
 	&Apache::lonmsg::user_normal_msg($user,$domain,
         "Error [$declutter]",join('<br />',@_));
       }
@@ -1335,33 +1266,56 @@ sub error {
 }
 
 sub warning {
+  $warningcount++;
   if ($ENV{'request.state'} eq 'construct') {
     print "<b>W</b>ARNING<b>:</b>".join('<br />',@_)."<br />\n";
   }
 }
 
 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 ( ! $args ) { return undef; }
+    if ( $case_insensitive ) {
+	if ($args =~ s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/ei) {
+	    return &Apache::run::run("{$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; }
+  &Apache::lonxml::debug("Args are $args param is $param");
+  if ($case_insensitive) {
+      if (! ($args=~s/(my \$)(\Q$param\E)(=\")/$1.lc($2).$3/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 =~ /^[\$\@\%]\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;
   }