--- loncom/xml/lonxml.pm	2005/01/30 23:31:12	1.355
+++ loncom/xml/lonxml.pm	2005/03/16 13:24:15	1.363
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # XML Parser Module 
 #
-# $Id: lonxml.pm,v 1.355 2005/01/30 23:31:12 www Exp $
+# $Id: lonxml.pm,v 1.363 2005/03/16 13:24:15 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -149,20 +149,25 @@ $Apache::lonxml::post_evaluate=1;
 $Apache::lonxml::warnings_error_header='';
 
 sub xmlbegin {
-  my $output='';
-  @htmlareafields=();
-  if ($ENV{'browser.mathml'}) {
-      $output='<?xml version="1.0"?>'
-            .'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'
-            .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
-            .'[<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">]>'
+    my ($style)=@_;
+    my $output='';
+    @htmlareafields=();
+    if ($ENV{'browser.mathml'}) {
+	$output='<?xml version="1.0"?>'
+            #.'<?xml-stylesheet type="text/css" href="/adm/MathML/mathml.css"?>'."\n"
+#            .'<!DOCTYPE html SYSTEM "/adm/MathML/mathml.dtd" '
+            
+#	    .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" [<!ENTITY mathns "http://www.w3.org/1998/Math/MathML">] >'
+	    .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd">'
             .'<html xmlns:math="http://www.w3.org/1998/Math/MathML" ' 
-		.'xmlns="http://www.w3.org/TR/REC-html40">';
-  } else {
-      $output='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-<html>';
-  }
-  return $output;
+	    .'xmlns="http://www.w3.org/1999/xhtml">';
+    } else {
+	$output='<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html>';
+    }
+    if ($style eq 'encode') {
+	$output=&HTML::Entities::encode($output,'<>&"');
+    }
+    return $output;
 }
 
 sub xmlend {
@@ -173,13 +178,19 @@ sub xmlend {
 	$mode='problem';
 	$status=$Apache::inputtags::status[-1]; 
     }
-    my $discussion=&Apache::lonfeedback::list_discussion($mode,$status);    
+    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 '';
     } else {
-	return $discussion.'</html>';
+	return $discussion.&Apache::loncommon::endbodytag();
     }
 }
 
@@ -284,7 +295,7 @@ sub printtokenheader {
     }
 }
 
-sub fontsettings() {
+sub fontsettings {
     my $headerstring='';
     if (($ENV{'browser.os'} eq 'mac') && (!$ENV{'browser.mathml'})) { 
 	$headerstring.=
@@ -353,8 +364,8 @@ sub xmlparse {
 
  my @stack = ();
  my @parstack = ();
- &initdepth;
-
+ &initdepth();
+ &init_alarm();
  my $finaloutput = &inner_xmlparse($target,\@stack,\@parstack,\@pars,
 				   $safeeval,\%style_for_target);
 
@@ -363,6 +374,9 @@ sub xmlparse {
  }
  &do_registered_ssi();
  if ($Apache::lonxml::counter_changed) { &store_counter() }
+ if ($ENV{'form.return_only_error_and_warning_counts'}) {
+     return "$errorcount:$warningcount";
+ }
  return $finaloutput;
 }
 
@@ -787,6 +801,28 @@ sub default_homework_load {
     }
 }
 
+{
+    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 $metamode_was;
 sub startredirection {
     if (!$Apache::lonxml::redirection) {
@@ -1267,8 +1303,10 @@ sub handler {
 	&Apache::loncommon::content_type($request,'text/html');
     }
     &Apache::loncommon::no_cache($request);
-    $request->set_last_modified(&Apache::lonnet::metadata($request->uri,
-							  'lastrevisiondate'));
+    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;