--- loncom/homework/structuretags.pm	2005/11/03 11:10:25	1.308
+++ loncom/homework/structuretags.pm	2006/03/29 22:41:32	1.339
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.308 2005/11/03 11:10:25 foxr Exp $
+# $Id: structuretags.pm,v 1.339 2006/03/29 22:41:32 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -36,15 +36,16 @@ use Apache::File();
 use Apache::lonmenu;
 use Apache::lonlocal;
 use Apache::lonxml;
+use Apache::lonenc();
 use Time::HiRes qw( gettimeofday tv_interval );
 BEGIN {
     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startouttext','endouttext','simpleeditbutton','definetag'));
 }
 
 sub start_web {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-    my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
-    if ($target eq 'web') {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    my $bodytext=&Apache::lonxml::get_all_text("/web",$parser,$style);
+    if ($target eq 'web' || $target eq 'webgrade') {
 	return $bodytext;
     }
     return '';
@@ -55,9 +56,9 @@ sub end_web {
 }
 
 sub start_tex {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';
-    my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
+    my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
     if ($target eq 'tex') {
 	return $bodytext.' ';
     }
@@ -113,13 +114,28 @@ sub page_start {
 	    &Apache::lonhtmlcommon::htmlareaheaders().
 	    &Apache::lonhtmlcommon::spellheader().
 	    &Apache::lonxml::fontsettings();     
+	my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
+	if ($css_href =~ /\S/) {
+	    &Apache::lonxml::extlink($css_href);
+	    $head_tag_start = 
+		'<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
+	}
+	if ($target eq 'edit') {
+	    $head_tag_start.=&Apache::edit::js_change_detection();
+	}
     }
     my $body_tag_start;
-    if (!defined($found{'body'}) && $env{'request.state'} eq 'construct'
-	&& $env{'environment.remote'} eq 'off') {
-	if ($target eq 'web' || $target eq 'edit') {
-	    $body_tag_start=&Apache::loncommon::bodytag();
-	    $body_tag_start.=&Apache::lonxml::message_location();
+    if (!defined($found{'body'}) && $env{'request.state'} eq 'construct') {
+	if ($env{'environment.remote'} eq 'off') {
+	    if ($target eq 'web' || $target eq 'edit') {
+		$body_tag_start=&Apache::loncommon::bodytag();
+		$body_tag_start.=&Apache::lonxml::message_location();
+	    }
+	} else {
+	    if ($target eq 'web' || $target eq 'edit') {
+		$body_tag_start=&Apache::loncommon::bodytag(undef,undef,undef,1);
+		$body_tag_start.=&Apache::lonxml::message_location();
+	    }
 	}
     } elsif (!defined($found{'body'})) {
 	my $background=&Apache::lonxml::get_param('background',$parstack,
@@ -141,10 +157,13 @@ sub page_start {
     }
     my $form_tag_start;
     if (!defined($found{'form'})) {
-	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="POST" action="';
-	my $uri=$env{'request.uri'};
-	if ($env{'request.enc'}) { $uri=&Apache::lonenc::encrypted($uri); }
-	$form_tag_start.=$uri.'">';
+	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
+	my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
+	$form_tag_start.=$uri.'" ';
+	if ($target eq 'edit') {
+	    $form_tag_start.=&Apache::edit::form_change_detection();
+	}
+	$form_tag_start.='>';
     }
     return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
 }
@@ -173,8 +192,12 @@ sub setup_rndseed {
     my ($safeeval)=@_;
     my $rndseed;
     my ($symb)=&Apache::lonxml::whichuser();
-    if ($env{'request.state'} eq "construct" || $symb eq '' ||
-          $Apache::lonhomework::history{'resource.CODE'}) {
+    if ($env{'request.state'} eq "construct" 
+	|| $symb eq '' 
+	|| $Apache::lonhomework::type eq 'practice'
+	|| $Apache::lonhomework::history{'resource.CODE'}) {
+	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
+						['rndseed']);
 	$rndseed=$env{'form.rndseed'};
 	if (!$rndseed) {
 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
@@ -217,7 +240,7 @@ sub problem_edit_header {
 	&Apache::structuretags::remember_problem_state().'
        <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
        <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
-       <input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
+       <input '.&Apache::edit::submit_ask_anyway().' type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> <hr />
        <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes and Edit').'" />
        <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
@@ -245,9 +268,11 @@ sub option {
 
 sub problem_web_to_edit_header {
     my ($rndseed)=@_;
-    my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />
-             <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
-             <input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
+    my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />';
+    if (!$Apache::lonhomework::parsing_a_task) {
+	$result .= '<input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />';
+    }
+    $result .= '<input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
              <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
              <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
              <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
@@ -255,11 +280,17 @@ sub problem_web_to_edit_header {
 	       $rndseed.'"
            onchange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
              <label><input type="checkbox" name="showallfoils" ';
+    my $show_all_foils_text = 
+	($Apache::lonhomework::parsing_a_task) ?
+	&mt('&nbsp;Show&nbsp;All&nbsp;Instances')
+	: &mt('&nbsp;Show&nbsp;All&nbsp;Foils');
+
     if (defined($env{'form.showallfoils'})) { $result.='checked="on"'; }
-    $result.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
+    $result.= ' />'.$show_all_foils_text.
 	&Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
 	'</label><hr />';
-    $result.="
+    if (!$Apache::lonhomework::parsing_a_task) {
+	$result.="
 <nobr>
 Problem Status:
 <select name='problemstate'>
@@ -290,15 +321,16 @@ Feedback Mode:
 </nobr>
 <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
 <hr />";
-    my $numtoanalyze=$env{'form.numtoanalyze'};
-    if (!$numtoanalyze) { $numtoanalyze=20; }
-    $result.= '<input type="submit" name="problemmode" value='.
-	&mt('"Calculate answers').'" /> for
+	my $numtoanalyze=$env{'form.numtoanalyze'};
+	if (!$numtoanalyze) { $numtoanalyze=20; }
+	$result.= '<input type="submit" name="problemmode" value='.
+	    &mt('"Calculate answers').'" /> for
              <input type="text" name="numtoanalyze" value="'.
 	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
 	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
 						     '',undef,undef,300).
 						     '<hr />';
+    }
     return $result;
 }
 
@@ -306,9 +338,19 @@ sub initialize_storage {
     %Apache::lonhomework::results=();
     %Apache::lonhomework::history=();
     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
-    if ($env{'request.state'} eq 'construct' || $symb eq '') {
+    if ($env{'request.state'} eq 'construct' 
+	|| $symb eq ''
+	|| $Apache::lonhomework::type eq 'practice') {
+	
+	my $namespace = $symb || $env{'request.uri'};
+	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
+	    $env{'form.resetdata'} eq &mt('New Problem Variation') ||
+	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
+	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
+	    &Apache::lonxml::debug("Attempt reset");
+	}
 	%Apache::lonhomework::history=
-	    &Apache::lonnet::tmprestore($env{'request.uri'},'',$domain,$name);
+	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
 	my ($temp)=keys %Apache::lonhomework::history ;
 	&Apache::lonxml::debug("Return message of $temp");
     } else {
@@ -329,11 +371,16 @@ sub initialize_storage {
 sub finalize_storage {
     my $result;
     if (%Apache::lonhomework::results) {
+	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
+	delete(@Apache::lonhomework::results{@remove});
 	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
-	if ($env{'request.state'} eq 'construct' || $symb eq '') {
+	if ($env{'request.state'} eq 'construct' 
+	    || $symb eq ''
+	    || $Apache::lonhomework::type eq 'practice') {
+	    my $namespace = $symb || $env{'request.uri'};
 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
-					$env{'request.uri'},'',$domain,$name);
+					      $namespace,'',$domain,$name);
 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
 	} else {
 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
@@ -343,6 +390,8 @@ sub finalize_storage {
                 &store_aggregates($symb,$courseid);
             }
 	}
+    } else {
+	&Apache::lonxml::debug('Nothing to store');
     }
     return $result;
 }
@@ -422,10 +471,6 @@ sub firstaccess_msg {
 ENDCHECKOUT
 }
 
-# initializes the problem globals across the inputtags, lonhomework, and 
-# structuretags modules.
-#
-# 
 sub init_problem_globals {
     my ($type)=@_;
     #initialize globals
@@ -497,7 +542,12 @@ sub get_problem_status {
 }
 
 sub start_problem {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+
+    # We'll use the redirection to fix up printing of duedates.
+    if (!$Apache::lonxml::metamode) {
+	&Apache::lonxml::startredirection();
+    }
 
     # Problems don't nest and we don't allow more than one <problem> in
     # a .problem file.
@@ -505,7 +555,7 @@ sub start_problem {
     if ( $Apache::inputtags::part ne '' ||
 	 $Apache::lonhomework::parsing_a_problem) {
 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
-	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
+	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
 	return '';
     }
 
@@ -527,7 +577,7 @@ sub start_problem {
 	    defined($env{'form.problemtype'})) {
 	    $Apache::lonhomework::type=$env{'form.problemtype'};
 	}
-	&Apache::lonxml::debug("Found this to be of type :$Apache::ltonhomework::type:");
+	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
     }
     if ($Apache::lonhomework::type eq '' ) {
 	my $uri=$env{'request.uri'};
@@ -573,14 +623,18 @@ sub start_problem {
 	#handle rand seed in construction space
 	my $rndseed=&setup_rndseed($safeeval);
 	my ($symb)=&Apache::lonxml::whichuser();
-	if ($env{'request.state'} ne "construct" && $symb eq '') {
+	if ($env{'request.state'} ne "construct" && 
+	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
 		$rndseed.'" />'.
 		    '<input type="submit" name="resetdata"
-                             value="'.&mt('New Problem Variation').'" />'.
+                             value="'.&mt('New Problem Variation').'" />';
+	    if (exists($env{'form.username'})) {
+		$form_tag_start.=
 		    '<input type="hidden" name="username"
                              value="'.$env{'form.username'}.'" />';
-	    if ($env{'user.adv'}) {
+	    }
+	    if ($env{'request.role.adv'}) {
 		$form_tag_start.=
 		    ' <label><input type="checkbox" name="showallfoils" ';
 		if (defined($env{'form.showallfoils'})) {
@@ -591,19 +645,25 @@ sub start_problem {
 	    }
 	    $form_tag_start.='<hr />';
 	}
-	($status,$accessmsg) = &Apache::lonhomework::check_access('0');
+
+	($status,$accessmsg,my $slot_name,my $slot) = 
+	    &Apache::lonhomework::check_slot_access('0','problem');
 	push (@Apache::inputtags::status,$status);
+
 	my $expression='$external::datestatus="'.$status.'";';
 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
 	&Apache::run::run($expression,$safeeval);
 	&Apache::lonxml::debug("Got $status");
+
 	if (( $status eq 'CLOSED' ) ||
 	    ( $status eq 'UNCHECKEDOUT') ||
 	    ( $status eq 'NOT_YET_VIEWED') ||
 	    ( $status eq 'BANNED') ||
 	    ( $status eq 'UNAVAILABLE') ||
+	    ( $status eq 'NOT_IN_A_SLOT') ||
 	    ( $status eq 'INVALID_ACCESS')) {
-	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
+	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
+						       $style);
 	    if ( $target eq "web" ) {
 		$result.= $head_tag_start.'</head>';
 		my $msg=$body_tag_start;
@@ -618,16 +678,32 @@ sub start_problem {
 		    $msg.=&checkout_msg;
 		} elsif ($status eq 'NOT_YET_VIEWED') {
 		    $msg.=&firstaccess_msg($accessmsg,$symb);
+		} elsif ($status eq 'NOT_IN_A_SLOT') {
+		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work.");
 		}
 		$result.=$msg.'<br />';
 	    } elsif ($target eq 'tex') {
-		$result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
+		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
+		                    : '\begin{minipage}{\textwidth}';
+		$result.='\begin{document}\noindent \vskip 1 mm '.
+		    $startminipage.'\vskip 0 mm';
 		if ($status eq 'UNAVAILABLE') {
 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
 		} else {
 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
 		}
 	    }
+	} elsif ($status eq 'NEEDS_CHECKIN') {
+	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
+						       $style);
+	    if ($target eq 'web') {
+		$result .= $head_tag_start.'</head>';
+		$result .= $body_tag_start;
+		$result .= &Apache::bridgetask::proctor_validation_screen();
+	    } elsif ($target eq 'grade') {
+		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
+							'problem');
+	    }
 	} elsif ($target eq 'web') {
 	    my $name= &get_resource_name($parstack,$safeeval);
 	    $result.="$head_tag_start<title>$name</title></head>
@@ -645,76 +721,8 @@ sub start_problem {
 		}
 	    }
 	} elsif ($target eq 'tex') {
-	    my $startminipage = '';
-	    if (not $env{'form.problem_split'}=~/yes/) {
-		$startminipage = '\begin{minipage}{\textwidth}';
-	    }
-	    my $id = $Apache::inputtags::part;
-	    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
-	    my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
-	    my @packages = split /,/,$packages;
-	    my $allow_print_points = 0;
-	    foreach my $partial_key (@packages) {
-		if ($partial_key=~m/^part_0$/) {
-		    $allow_print_points=1;
-		}
-	    }
-	    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
-	    if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
-	    if (lc($env{'course.'.$env{'request.course.id'}.
-			    '.disableexampointprint'}) eq 'yes') {
-		$allow_print_points=0;
-	    }
-	    my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
-	    my $begin_doc='\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent ';
-	    my $toc_line='\vskip 1 mm\noindent '.$startminipage.
-		'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
-
-	    #  Figure out what the due date is and if we need to print it in the problem header.
-	    #  We have been logging the last due date written to file.  
-	    #
-
-
-	    my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
-	    my $duedate = POSIX::strftime("%c",localtime($duetime));
-	    my $temp_file;
-	    my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
-
-	    # Figure out what the last printed due date is or set it to the epoch if no duedates
-	    # have been printed.
-
-	    my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
-	    if (-e $filename) {
-		$temp_file = Apache::File->new($filename);
-		my @due_file      = <$temp_file>;
-		$due_file_content = $due_file[$#due_file];
-		chomp $due_file_content;
-	    } 
-	    # The big change; Due do the comparison on 
-	    # the absolute time rather than textual time since that is format independent.
-	    #
-	    if ($due_file_content ne $duetime) {
-		$temp_file = Apache::File->new('>'.$filename);
-		print $temp_file "$duetime\n";
-		if (not $env{'request.symb'} =~ m/\.page_/) {
-		    if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
-			$result .= $begin_doc.
-			    '\textit{Due date: '.$duedate.'} '.$toc_line;
-		    } else {
-			$result .= $begin_doc.$toc_line;
-			if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
-		    }
-		} else {
-		    $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
-		}
-	    } else {
-		if (not $env{'request.symb'} =~ m/\.page_/) {
-		    $result .= $begin_doc.$toc_line;
-		    if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
-		} else {
-		    $result .= '\vskip 1mm \\\\\\\\';
-		}
-	    }
+	    $result .= 'INSERTTEXFRONTMATTERHERE';
+
 	}
     } elsif ($target eq 'edit') {
 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
@@ -735,7 +743,103 @@ sub start_problem {
 
 sub end_problem {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-    my $result='';
+    my $result;
+
+    if (!$Apache::lonxml::metamode) {
+	$result = &Apache::lonxml::endredirection(); #started in &start_problem
+	$Apache::lonxml::post_evaluate=0;
+    }
+
+    if ($target eq 'tex') {
+
+	# Figure out the front matter and replace the
+	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
+	# this in end_problem because whether or not we display due
+	# dates depends on whether due dates have already been
+	# displayed in the problem parts.
+
+	my $frontmatter   = '';
+	my $startminipage = '';
+	if (not $env{'form.problem_split'}=~/yes/) {
+	    $startminipage = '\begin{minipage}{\textwidth}';
+	}
+	my $id = $Apache::inputtags::part;
+	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
+	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
+	my @packages = split /,/,$packages;
+	my $allow_print_points = 0;
+	foreach my $partial_key (@packages) {
+	    if ($partial_key=~m/^part_0$/) {
+		$allow_print_points=1;
+	    }
+	}
+	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
+	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
+	if (lc($env{'course.'.$env{'request.course.id'}.
+			'.disableexampointprint'}) eq 'yes') {
+	    $allow_print_points=0;
+	}
+	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
+	my $begin_doc='\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent ';
+	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
+	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
+	
+	#  Figure out what the due date is and if we need to print
+	#  it in the problem header.  We have been logging the
+	#  last due date written to file. 
+	
+	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
+	my $duedate = POSIX::strftime("%c",localtime($duetime));
+	my $temp_file;
+	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
+	
+	# Figure out what the last printed due date is or set it
+	# to the epoch if no duedates have been printed.
+	
+	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
+	if (-e $filename) {
+	    $temp_file = Apache::File->new($filename);
+	    my @due_file      = <$temp_file>;
+	    $due_file_content = $due_file[$#due_file];
+	    chomp $due_file_content;
+	} 
+	
+	# We display the due date iff it is not the same as the last
+	# duedate in problem header ($due_file_content), and
+	# none of our parts displayed a duedate.
+	#
+	my $parts_with_displayduedate;
+	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
+	    $parts_with_displayduedate = 
+		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
+	} else {
+	    $parts_with_displayduedate = 0;
+	}
+	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
+	    $temp_file = Apache::File->new('>'.$filename);
+	    print $temp_file "$duetime\n";
+	    if (not $env{'request.symb'} =~ m/\.page_/) {
+		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
+		    $frontmatter .= $begin_doc.
+			'\textit{Due date: '.$duedate.'} '.$toc_line;
+		} else {
+		    $frontmatter.= $begin_doc.$toc_line;
+		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
+		}
+	    } else {
+		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
+	    }
+	} else {
+	    if (not $env{'request.symb'} =~ m/\.page_/) {
+		$frontmatter .= $begin_doc.$toc_line;
+		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
+	    } else {
+		$frontmatter .= '\vskip 1mm \\\\\\\\';
+	    }
+	}
+	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
+    }
+
     my $status=$Apache::inputtags::status['-1'];
     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
 	$target eq 'tex') {
@@ -743,6 +847,8 @@ sub end_problem {
 	    # if part is zero, no <part>s existed, so we need to the grading
 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
 		&Apache::inputtags::grade;
+	    } elsif ($status eq 'NEEDS_CHECKIN') {
+		# no need to grade, and don't want to hide data
 	    } else {
 		# move any submission data to .hidden
 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
@@ -803,7 +909,10 @@ sub end_problem {
 	$result.=&Apache::response::meta_response_order();
     } elsif ($target eq 'edit') {
 	&Apache::lonxml::debug("in end_problem with $target, edit");
-	$result = &problem_edit_footer();
+	$result .= &problem_edit_footer();
+    } elsif ($target eq 'modified') {
+	 $result .= $token->[2];
+	 $result.=&Apache::edit::handle_insertafter($token->[1]);
     }
 
     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
@@ -862,12 +971,12 @@ sub end_library {
 }
 
 sub start_definetag {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
 
     my $result;
 
     my $name = $token->[2]->{'name'};
-    my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
+    my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
     if ($name=~/^\//) {
 	$result=
  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
@@ -890,8 +999,8 @@ sub start_block {
 
     my $result;
 
-    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
-	$target eq 'tex' || $target eq 'analyze') {
+    if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
+	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
 	my $code = $token->[2]->{'condition'};
 	if (defined($code)) {
 	    if (!$Apache::lonxml::default_homework_loaded) {
@@ -934,8 +1043,8 @@ sub start_languageblock {
 
     my $result;
 
-    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
-	$target eq 'tex' || $target eq 'analyze') {
+    if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
+	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
 	my $include = $token->[2]->{'include'};
 	my $exclude = $token->[2]->{'exclude'};
         my %languages=&Apache::loncommon::display_languages();
@@ -987,8 +1096,8 @@ sub start_instructorcomment {
 
     my $result;
 
-    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
-	$target eq 'tex' || $target eq 'analyze') {
+    if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
+	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
@@ -1013,11 +1122,11 @@ sub end_instructorcomment {
 }
 
 sub start_while {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
 
     my $result;
-    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
-	$target eq 'tex' || $target eq 'analyze') {
+    if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
+	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
 	my $code = $token->[2]->{'condition'};
 
 	push( @Apache::structuretags::whileconds, $code);
@@ -1025,7 +1134,7 @@ sub start_while {
 	    &Apache::lonxml::default_homework_load($safeeval);
 	}
 	my $result = &Apache::run::run($code,$safeeval);
-	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
+	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
 	push( @Apache::structuretags::whilebody, $bodytext);
 	push( @Apache::structuretags::whileline, $token->[5]);
 	&Apache::lonxml::debug("s code $code got -$result-");
@@ -1049,8 +1158,8 @@ sub end_while {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result;
 
-    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
-	$target eq 'tex' || $target eq 'analyze') {
+    if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
+	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
 	my $code = pop(@Apache::structuretags::whileconds);
 	my $bodytext = pop(@Apache::structuretags::whilebody);
 	my $line = pop(@Apache::structuretags::whileline);
@@ -1081,10 +1190,10 @@ sub end_while {
 #  ...
 # </randomlist>
 sub start_randomlist {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
-    if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
-	$target eq 'tex' || $target eq 'analyze') {
+    if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
+	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
 	my $b_parser= HTML::LCParser->new(\$body);
 	$b_parser->xml_mode(1);
@@ -1174,7 +1283,11 @@ sub ordered_show_check {
 }
 
 sub start_part {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    if (!$Apache::lonxml::metamode) {
+	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
+	                                     # duedates.
+    }
     my $result='';
     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
     if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
@@ -1199,7 +1312,7 @@ sub start_part {
     } elsif ($target eq 'web' || $target eq 'grade' ||
 	     $target eq 'answer' || $target eq 'tex') {
 	if ($hidden || !$in_order_show) {
-	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
+	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
 	} else {
 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
 	    push (@Apache::inputtags::status,$status);
@@ -1215,7 +1328,8 @@ sub start_part {
 		( $status eq 'BANNED') ||
 		( $status eq 'UNAVAILABLE') ||
 		( $status eq 'INVALID_ACCESS')) {
-		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
+		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
+							   $style);
 		if ( $target eq "web" ) {
 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
 		} elsif ( $target eq 'tex' ) {
@@ -1283,13 +1397,15 @@ sub end_part {
     my $status=$Apache::inputtags::status['-1'];
     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
     my $in_order_show=&ordered_show_check();
-    my $result='';
-    if ( $target eq 'meta' ) {
-	$result='';
-    } elsif ($target eq 'grade') {
+    my $result;
+    if (!$Apache::lonxml::metamode) {
+	$result = &Apache::lonxml::endredirection(); # started in &start_part
+	$Apache::lonxml::post_evaluate=0;
+    }
+    if ($target eq 'grade') {
 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
 	    !$hidden && $in_order_show) {
-	    $result=&Apache::inputtags::grade;
+	    $result.=&Apache::inputtags::grade;
 	} else {
 	    # move any submission data to .hidden
 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
@@ -1301,10 +1417,13 @@ sub end_part {
 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
 	    $gradestatus='';
 	}
-	$result=$gradestatus;
+	$result.=$gradestatus;
 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
     } elsif ($target eq 'edit') {
-	$result=&Apache::edit::end_table();
+	$result.=&Apache::edit::end_table();
+    } elsif ($target eq 'modified') {
+	 $result .= $token->[2];
+	 $result.=&Apache::edit::handle_insertafter($token->[1]);
     }
     pop @Apache::inputtags::status;
     $Apache::inputtags::part='';
@@ -1313,14 +1432,15 @@ sub end_part {
 }
 
 sub start_preduedate {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
+	$target eq 'tex' || $target eq 'webgrade') {
 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
 	if (!$Apache::lonhomework::scantronmode &&
 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
-	    &Apache::lonxml::get_all_text("/preduedate",$parser);
+	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
 	}
     }
     return '';
@@ -1331,14 +1451,14 @@ sub end_preduedate {
 }
 
 sub start_postanswerdate {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-    if ($target eq 'web' || $target eq 'grade') {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade') {
 	if ($Apache::lonhomework::scantronmode ||
 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
-	    &Apache::lonxml::get_all_text("/postanswerdate",$parser);
+	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
 	}
     } elsif ($target eq 'tex') {
-	&Apache::lonxml::get_all_text("/postanswerdate",$parser);
+	&Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
     }
     return '';
 }
@@ -1348,15 +1468,15 @@ sub end_postanswerdate {
 }
 
 sub start_notsolved {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
-	$target eq 'tex') {
+	$target eq 'tex' || $target eq 'webgrade') {
 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
 	&Apache::lonxml::debug("not solved has :$gradestatus:");
 	if ($gradestatus =~ /^correct/ &&
 	    &Apache::response::show_answer()) {
 	    &Apache::lonxml::debug("skipping");
-	    &Apache::lonxml::get_all_text("/notsolved",$parser);
+	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
 	}
     }
     return '';
@@ -1367,13 +1487,13 @@ sub end_notsolved {
 }
 
 sub start_solved {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
 	$target eq 'tex') {
 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
 	if ($gradestatus !~ /^correct/ ||
 	    !&Apache::response::show_answer()) {
-	    &Apache::lonxml::get_all_text("/solved",$parser);
+	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
 	}
     }
     return '';
@@ -1384,10 +1504,10 @@ sub end_solved {
 }
 
 sub start_problemtype {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result;
-    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
-	$target eq 'tex' || $target eq 'analyze') {
+    if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
+	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
 	if (!defined($mode)) { $mode='show'; }
 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
@@ -1396,10 +1516,10 @@ sub start_problemtype {
 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
 	}
 	if ($mode eq 'show' && !$found) {
-	    &Apache::lonxml::get_all_text("/problemtype",$parser);
+	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
 	}
 	if ($mode eq 'hide' && $found) {
-	    &Apache::lonxml::get_all_text("/problemtype",$parser);
+	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
 	}
     } elsif ($target eq 'edit') {
 	$result .=&Apache::edit::tag_start($target,$token);
@@ -1433,12 +1553,12 @@ sub start_startouttext {
 }
 
 sub end_startouttext {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';
     my $text='';
 
     if ($target eq 'edit') {
-	$text=&Apache::lonxml::get_all_text("endouttext",$parser);
+	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
 <td>".&mt('Delete:').
                  &Apache::edit::deletelist($target,$token)
@@ -1477,8 +1597,8 @@ sub end_endouttext {
 }
 
 sub delete_startouttext {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-    #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
     my $text=$$parser['-1']->get_text("/endouttext");
     my $ntoken=$$parser['-1']->get_token();
     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
@@ -1495,7 +1615,7 @@ sub start_simpleeditbutton {
     my $result='';
     if (($env{'form.simple_edit_button'} ne 'off') &&
 	($target eq 'web') &&
-        (&Apache::lonnet::allowed('srm',$env{'request.course.id'}))) {
+        (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
         my $url=$env{'request.noversionuri'};
         $url=~s/\?.*$//;
 	my ($symb) = &Apache::lonxml::whichuser();