--- loncom/homework/structuretags.pm	2003/04/03 14:53:44	1.160
+++ loncom/homework/structuretags.pm	2003/11/21 20:21:20	1.226
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.160 2003/04/03 14:53:44 albertel Exp $
+# $Id: structuretags.pm,v 1.226 2003/11/21 20:21:20 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -36,9 +36,11 @@ use strict;
 use Apache::lonnet;
 use Apache::File();
 use Apache::lonmenu;
+use Apache::lonlocal;
 
 BEGIN {
-    &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
+    &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext',
+'simpleeditbutton','definetag'));
 }
 
 sub start_web {
@@ -56,11 +58,12 @@ sub end_web {
 
 sub start_tex {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result='';
     my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
     if ($target eq 'tex') {
 	return $bodytext.' ';
     }
-    return '';
+    return $result;;
 }
 
 sub end_tex {
@@ -70,7 +73,7 @@ sub end_tex {
 sub page_start {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my %found;
-    foreach my $taginside ($tagstack) {
+    foreach my $taginside (@$tagstack) {
 	foreach my $taglookedfor ('html','body','form') {
 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
 	}
@@ -89,6 +92,7 @@ sub page_start {
 	    'onUnload="'.&Apache::lonmenu::unloadevents().'" ';
 	my $background=&Apache::lonxml::get_param('background',$parstack,
 						  $safeeval);
+	if ($ENV{'browser.imagesuppress'} eq 'on') { $background=''; }
 	if ($background) {
 	    $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
 		$background;
@@ -96,18 +100,22 @@ sub page_start {
 	} else {
 	    my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
 						   $safeeval);
-	    if ($bgcolor) {
+	    if (($bgcolor) && ($ENV{'browser.blackwhite'} ne 'on')) {
 		$body_tag_start.='bgcolor="'.$bgcolor.'" ';
 	    } else {
 		$body_tag_start.='bgcolor="#ffffff"';
 	    }
 	}
+	if ($ENV{'browser.fontenhance'} eq 'on') {
+	    $body_tag_start.=' style="font-size: x-large;" ';
+	}
 	$body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
 	if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
-	    my ($symb)=&Apache::lonxml::whichuser();
-	    if ($symb eq '') {
+	    my ($symb,undef,undef,undef,$publicuser)=
+		&Apache::lonxml::whichuser();
+	    if ($symb eq '' && !$publicuser) {
 		my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
-		$help="Browsing or <a href=\"/adm/ambiguous\">ambiguous</a> reference, submissions ignored $help<br />";
+		$help=&mt("Browsing resource, all submissions are temporary.")."<br />";
 		$body_tag_start.=$help;
 	    }
 	}
@@ -123,11 +131,18 @@ sub page_start {
 #use Time::HiRes();
 sub get_resource_name {
     my ($parstack,$safeeval)=@_;
+    if (defined($Apache::lonhomework::name)) {
+	return $Apache::lonhomework::name;
+    }
     my $name=&Apache::lonnet::gettitle();
     if ($name eq '') {
 	$name=&Apache::lonnet::EXT('resource.title');
 	if ($name eq 'con_lost') { $name = ''; }
     }
+    if ($name!~/\S+/) {
+	$name=$ENV{'request.uri'};
+	$name=~s-.*/([^/]+)$-$1-;
+    }
     $Apache::lonhomework::name=$name;
     return $name;
 }
@@ -135,59 +150,83 @@ sub get_resource_name {
 sub setup_rndseed {
     my ($safeeval)=@_;
     my $rndseed;
-    if ($ENV{'request.state'} eq "construct") {
+    my ($symb)=&Apache::lonxml::whichuser();
+    if ($ENV{'request.state'} eq "construct" || $symb eq '') {
 	$rndseed=$ENV{'form.rndseed'};
 	if (!$rndseed) {
-	    $rndseed=time;
+	    $rndseed=$Apache::lonhomework::history{'rndseed'};
+	    if (!$rndseed) {
+		$rndseed=time;
+		$ENV{'form.rndseed'}=$rndseed;
+	    }
+	}
+	if ($ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
+	    $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
+	    srand(time);
+	    $rndseed=int(rand(2100000000));
 	    $ENV{'form.rndseed'}=$rndseed;
+	    delete($ENV{'form.resetdata'});
+	    delete($ENV{'form.newrandomization'});
+	}
+	if (defined($rndseed) && $rndseed ne int($rndseed)) {
+	   $rndseed=join(',',&Math::Random::random_seed_from_phrase($rndseed));
+        }
+	if ($safeeval) {
+	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
+	    &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
 	}
-	&Apache::lonxml::debug("Setting rndseed to $rndseed");
-	&Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
     }
     return $rndseed;
 }
 
 sub problem_edit_header {
     return '<input type="hidden" name="submitted" value="edit" />
-       <input type="hidden" name="problemmode" value="Edit" />
-       <input type="submit" name="problemmode" value="Discard Edits and View" />
-       <input type="submit" name="problemmode" value="EditXML" />
-       <input type="submit" name="Undo" value="undo" /> <hr />
-       <input type="submit" name="submit" value="Submit Changes and Edit" />
-       <input type="submit" name="submit" value="Submit Changes and View" /><br /><p>&nbsp;</p><table border="0"><tr><td bgcolor="#DDDDDD">
+       <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
+       <input type="submit" name="problemmode" value="'.&mt('Discard Edits and View').'" />
+       <input type="submit" name="problemmode" value="'.&mt('EditXML').'" />
+       <input type="submit" name="Undo" value="'.&mt('undo').'" /> <hr />
+       <input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
+       <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" /><br /><p>&nbsp;</p><table border="0"><tr><td bgcolor="#DDDDDD">
       ';
 }
 
 sub problem_edit_footer {
-    return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
-    <input type="submit" name="submit" value="Submit Changes and View" />';
+    return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
+    <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />';
 }
 
 sub problem_web_to_edit_header {
     my ($rndseed)=@_;
-    my $result.='<input type="hidden" name="problemmode" value="View" />
-             <input type="submit" name="problemmode" value="Edit" />
-             <input type="submit" name="problemmode" value="EditXML" />
-             Random Seed:<input type="text" name="rndseed" width="10" value="'.
-	       $rndseed.'" />
-             <input type="submit" name="changerandseed" value="Change" />
-             <input type="submit" name="resetdata" value="Reset Submissions" />
+    my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />
+             <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
+             <input type="submit" name="problemmode" value="'.&mt('EditXML').'" />
+             <input type="submit" name="newrandomization" value="'.&mt('New Randomization').'" />
+             <input type="submit" name="resetdata" value="'.&mt('Reset Submissions').'" />
+             <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
+              <input type="text" name="rndseed" width="10" value="'.
+	       $rndseed.'"
+           onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
              <input type="checkbox" name="showallfoils" ';
     if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
-    $result.= ' />&nbsp;Show&nbsp;All&nbsp;Foils
+    $result.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').'
              <hr />';
     my $numtoanalyze=$ENV{'form.numtoanalyze'};
-    if (!$numtoanalyze) { $numtoanalyze=100; }
-    $result.= '<input type="submit" name="problemmode" value="Answer Distribution" />
+    if (!$numtoanalyze) { $numtoanalyze=20; }
+    $result.= '<input type="submit" name="problemmode" value='.
+	&mt('"Calculate answers').'" /> for
              <input type="text" name="numtoanalyze" value="'.
-		 $numtoanalyze.'" size="5" /> <hr />';
+	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
+	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
+						     '',undef,undef,300).
+						     '<hr />';
     return $result;
 }
 
 sub initialize_storage {
     %Apache::lonhomework::results=();
+    %Apache::lonhomework::history=();
     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
-    if ($ENV{'request.state'} eq 'construct') {
+    if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
 	%Apache::lonhomework::history=
 	    &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
 	my ($temp)=keys %Apache::lonhomework::history ;
@@ -210,7 +249,8 @@ sub finalize_storage {
     my ($temp) = keys %Apache::lonhomework::results;
     if ( $temp ne '' ) {
 	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
-	if ($ENV{'request.state'} eq 'construct') {
+	if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
+	    $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
 					$ENV{'request.uri'},'',$domain,$name);
 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
@@ -224,39 +264,79 @@ sub finalize_storage {
 }
 
 sub checkout_msg {
+    my %lt=&Apache::lonlocal::texthash( 
+		'resource'=>'The resource needs to be checked out',
+		'id_expln'=>'As a resource gets checked out, a unique timestamped ID is given to it, and a permanent record is left in the system.',
+                'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
+                'checkout'=>'Check out Exam for Viewing',
+		'checkout?'=>'Check out Exam?');
     return (<<ENDCHECKOUT);
-<h2>The resource needs to be checked out</h2>
-As a resource gets checked out, a unique timestamped ID is given to it, and a
-permanent record is left in the system.<p />
-<font color=red>
-Checking out resources is subject to course policies, and may exclude future
-credit even if done erroneously.<p />
+<h2>$lt{'resource'}</h2>
+    <p>$lt{'id_expln'}</p>
+<font color="red">
+<p>$lt{'warning'}</p>
 </font>
 <form name="checkout" method="POST" action="$ENV{'request.uri'}">
 <input type="hidden" name="doescheckout" value="yes" />
-<input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
+<input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
 </form>
 ENDCHECKOUT
 }
 
-sub start_problem {
-    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-
-    $Apache::lonhomework::parsing_a_problem=1;
-    # meta is called from lonpublisher, which doesn't uses the normal
-    # lonhomework method of parsing the file which means that inputtags 
-    # won't get reset
-    if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
-	&Apache::lonxml::error('Only one problem allowed in a .problem file');
-	my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
-	return '';
+sub init_problem_globals {
+    my ($type)=@_;
+    #initialize globals
+    if ($type eq 'problem') {
+	$Apache::inputtags::part='0';
+	@Apache::inputtags::partlist=('0');
+	$Apache::lonhomework::problemstatus=
+	    &Apache::lonnet::EXT('resource.0.problemstatus');
+    } else {
+	$Apache::inputtags::part='';
+	@Apache::inputtags::partlist=();
+	$Apache::lonhomework::problemstatus='';	
     }
-#intialize globals
-    $Apache::inputtags::part='0';
     @Apache::inputtags::responselist = ();
+    @Apache::inputtags::importlist = ();
     @Apache::inputtags::previous=();
     @Apache::inputtags::previous_version=();
     $Apache::structuretags::printanswer='No';
+    @Apache::structuretags::whileconds=();
+    @Apache::structuretags::whilebody=();
+    @Apache::structuretags::whileline=();
+    $Apache::lonhomework::scantronmode=0;
+    undef($Apache::lonhomework::name);
+
+}
+
+sub reset_problem_globals {
+    my ($type)=@_;
+    undef(%Apache::lonhomework::history);
+    undef(%Apache::lonhomework::results);
+    undef($Apache::inputtags::part);
+#don't undef this, lonhomework.pm takes care of this, we use this to 
+#detect if we try to do 2 problems in one file
+#   undef($Apache::lonhomework::parsing_a_problem);
+    undef($Apache::lonhomework::name);
+}
+
+sub start_problem {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+
+    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);
+	return '';
+    }
+
+    $Apache::lonhomework::parsing_a_problem=1;
+    &init_problem_globals('problem');
+
+    if (defined($ENV{'scantron.maxquest'})) {
+	$Apache::lonhomework::scantronmode=1;
+    }
+
     if ($target ne 'analyze') {
 	&initialize_storage();
 	if ($target eq 'web') {
@@ -265,7 +345,7 @@ sub start_problem {
 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
     }
-    if ($Apache::lonhomework::type eq '') {
+    if ($Apache::lonhomework::type eq '' ) {
 	my $uri=$ENV{'request.uri'};
 	if ($uri=~/\.(\w+)$/) {
 	    $Apache::lonhomework::type=$1;
@@ -277,7 +357,7 @@ sub start_problem {
     }
 
     #added vars to the scripting enviroment
-    my $expression='$external::part='.$Apache::inputtags::part.';';
+    my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
     &Apache::run::run($expression,$safeeval);
     my $status;
     my $accessmsg;
@@ -304,6 +384,15 @@ 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 '') {
+	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
+		$rndseed.'" />'.
+		    '<input type="submit" name="resetdata"
+                             value="'.&mt('New Problem Variation').'" />'.
+		    '<input type="hidden" name="username"
+                             value="'.$ENV{'form.username'}.'" /> <br />';
+	}
 	($status,$accessmsg) = &Apache::lonhomework::check_access('0');
 	push (@Apache::inputtags::status,$status);
 	my $expression='$external::datestatus="'.$status.'";';
@@ -313,17 +402,18 @@ sub start_problem {
 	if (( $status eq 'CLOSED' ) ||
 	    ( $status eq 'UNCHECKEDOUT') ||
 	    ( $status eq 'BANNED') ||
-	    ( $status eq 'UNAVAILABLE')) {
+	    ( $status eq 'UNAVAILABLE') ||
+	    ( $status eq 'INVALID_ACCESS')) {
 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
 	    if ( $target eq "web" ) {
 		$result.= $head_tag_start.'</head>';
 		my $msg=$body_tag_start;
 		if ($status eq 'UNAVAILABLE') {
-		    $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
+		    $result.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
 		} else {
-		    $result.='<h1>Not open to be viewed</h1>';
+		    $result.='<h1>'.&mt('Not open to be viewed').'</h1>';
 		}
-		if ($status eq 'CLOSED') {
+		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
 		    $msg.='The problem '.$accessmsg;
 		} elsif ($status eq 'UNCHECKEDOUT') {
 		    $msg.=&checkout_msg;
@@ -332,9 +422,9 @@ sub start_problem {
 	    } elsif ($target eq 'tex') {
 		$result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
 		if ($status eq 'UNAVAILABLE') {
-		    $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
+		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
 		} else {
-		    $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
+		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
 		}
 	    }
 	} elsif ($target eq 'web') {
@@ -345,7 +435,7 @@ sub start_problem {
               $body_tag_start \n $form_tag_start".	
 		  '<input type="hidden" name="submitted" value="yes" />';
 		if ($ENV{'request.state'} eq "construct") {
-		    $result.= &problem_web_to_edit_header($rndseed);
+		    $result.= &problem_web_to_edit_header($ENV{'form.rndseed'});
 		}
 		# if we are viewing someone else preserve that info
 		if (defined $ENV{'form.grade_symb'}) {
@@ -355,25 +445,24 @@ sub start_problem {
 		    }
 		}
 	    } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
-		     || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
+		     || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE' ||
+		     $status eq 'INVALID_ACCESS') {
 		$result.=$head_tag_start.
 		    "<title>$name</title></head>\n$body_tag_start\n";
 	    }
 	} elsif ($target eq 'tex') {
-	    my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
-	    if ($name eq '') {
-		$name=&Apache::lonnet::EXT('resource.title');
-		if ($name eq 'con_lost') { $name = ''; }
+	    my $startminipage = '';
+	    if (not $ENV{'form.problem_split'}=~/yes/) {
+		$startminipage = '\begin{minipage}{\textwidth}';
 	    }
-	    $Apache::lonhomework::name=$name;
 	    my $id = $Apache::inputtags::part;
 	    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
-	    my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
-	    my @allkeys = split /,/,$allkeys;
+	    my $packages=&Apache::lonnet::metadata($ENV{'request.uri'},'packages');
+	    my @packages = split /,/,$packages;
 	    my $allow_print_points = 0;
-	    foreach my $partial_key (@allkeys) {
-		if ($partial_key=~m/weight/) {
-		    $allow_print_points++;
+	    foreach my $partial_key (@packages) {
+		if ($partial_key=~m/part_0/) {
+		    $allow_print_points=1;
 		}
 	    }
 	    my $duedate = &Apache::lonnet::EXT("resource.$id.duedate"); 
@@ -394,9 +483,9 @@ sub start_problem {
 		print $temp_file "$duedate\n";
 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
 		    if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
-			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent \begin{minipage}{\textwidth}';	
+			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent '.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';	
 		    } else {
-			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent\begin{minipage}{\textwidth}';
+			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent'.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
 			if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
 		    }
 		} else {
@@ -404,7 +493,7 @@ sub start_problem {
 		}
 	    } else {
 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
-		    $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent\begin{minipage}{\textwidth}';	
+		    $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent'.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';	
 		    if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
 		} else {
 		    $result .= '\vskip 1mm \\\\\\\\';
@@ -414,6 +503,8 @@ sub start_problem {
     } elsif ($target eq 'edit') {
 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
 	    &problem_edit_header();
+	$Apache::lonxml::warnings_error_header=
+	    &mt("Editor Errors - these errors might not effect the running of the problem, but they will likely cause problems with further use of the Edit mode. Please use the EditXML mode to fix these errors.")."<br />";
 	my $temp=&Apache::edit::insertlist($target,$token);
 	$result.=$temp;
     } elsif ($target eq 'modified') {
@@ -449,21 +540,27 @@ sub end_problem {
 	    ($target eq 'answer') || ($target eq 'tex')
 	   ) {
 	    if ($status eq 'CAN_ANSWER') {
-		if ($target ne 'tex') {
+		if ($target ne 'tex' &&
+		    $ENV{'form.answer_output_mode'} ne 'tex') {
 		    $result.="</form></body>\n";
 		}
 	    } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
-		     $status eq 'UNCHECKEDOUT' ) {
-		if ($target ne 'tex') {
+		    $status eq 'UNCHECKEDOUT' || $status eq 'INVALID_ACCESS') {
+		if ($target ne 'tex' &&
+		    $ENV{'form.answer_output_mode'} ne 'tex') {
 		    $result.="</body>\n";
 		}
 	    }
 	    if ($target eq 'web') {
 		$result.=&Apache::lonxml::xmlend();
 	    } elsif ($target eq 'tex') {
-		$result .= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
+		my $endminipage = '';
+		if (not $ENV{'form.problem_split'}=~/yes/) {
+		    $endminipage = '\end{minipage}';
+		}
+		$result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
-		    $result .= '\end{minipage}\end{document} ';
+		    $result .= $endminipage.'\end{document} ';
 		} else {
 		    $result .= '';
 		}
@@ -473,23 +570,27 @@ sub end_problem {
 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
 	    &finalize_storage();
 	}
-	if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct') ) {
-	    $result.='</html>'; #normally we get it from xmlend, but in CSTR
+	if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
+	    && $ENV{'form.answer_output_mode'} ne 'tex') {
+	    $result.='</html>'; # normally we get it from xmlend, but in CSTR
 	                        # we always show answer mode too.
 	}
     } elsif ($target eq 'meta') {
 	if ($Apache::inputtags::part eq '0') {
+	    @Apache::inputtags::response=();
 	    $result=&Apache::response::mandatory_part_meta;
 	}
+	$result.=&Apache::response::meta_part_order();
     } elsif ($target eq 'edit') {
 	&Apache::lonxml::debug("in end_problem with $target, edit");
 	$result = &problem_edit_footer();
     }
 
-    undef(%Apache::lonhomework::history);
-    undef(%Apache::lonhomework::results);
-    undef($Apache::inputtags::part);
-    undef($Apache::lonhomework::parsing_a_problem);
+    if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
+	&Apache::inputtags::check_for_duplicate_ids();
+    }
+
+    &reset_problem_globals('problem');
 
     return $result;
 }
@@ -498,7 +599,7 @@ sub end_problem {
 sub start_library {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
-
+    if ($$tagstack[0] eq 'library') { &init_problem_globals('library') };
     if ($target eq 'edit') {
 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
@@ -532,18 +633,43 @@ sub end_library {
 	     $ENV{'request.state'} eq "construct") {
 	$result.='</form></body>'.&Apache::lonxml::xmlend();
     }
+    if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
     return $result;
 }
 
-sub start_block {
+sub start_definetag {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
 
     my $result;
 
+    my $name = $token->[2]->{'name'};
+    my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
+    if ($name=~/^\//) {
+	$result=
+ '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
+    } else {
+	$result=
+ '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
+    }
+    $skip=~s/\</\&lt\;/gs;
+    $skip=~s/\>/\&gt\;/gs;
+    $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
+    return $result;
+}
+
+sub end_definetag {
+    return '';
+}
+
+sub start_block {
+    my ($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') {
 	my $code = $token->[2]->{'condition'};
-	if ($code) {
+	if (defined($code)) {
 	    if (!$Apache::lonxml::default_homework_loaded) {
 		&Apache::lonxml::default_homework_load($safeeval);
 	    }
@@ -553,7 +679,7 @@ sub start_block {
 	    $result='1';
 	}
 	if ( ! $result ) {
-	    my $skip=&Apache::lonxml::get_all_text("/block",$parser);
+	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
 	}
 	$result='';
@@ -579,12 +705,94 @@ sub end_block {
     return $result;
 }
 
+sub start_languageblock {
+    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') {
+	my $include = $token->[2]->{'include'};
+	my $exclude = $token->[2]->{'exclude'};
+        my %languages=&Apache::loncommon::display_languages();
+        $result='1';
+	if ($include) {
+            $result='';
+            foreach (split(/\,/,$include)) {
+                if ($languages{$_}) { $result='1'; }
+            }
+	}
+        if ($exclude) {
+            foreach (split(/\,/,$exclude)) {
+                if ($languages{$_}) { $result='0'; }
+            }
+	}
+	if ( ! $result ) {
+	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
+						   $style);
+	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
+	}
+	$result='';
+    } elsif ($target eq 'edit') {
+	$result .=&Apache::edit::tag_start($target,$token);
+	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
+					  $token,40);
+	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
+					  $token,40);
+	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
+    } elsif ($target eq 'modified') {
+	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
+						     $safeeval,'include',
+						     'exclude');
+	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
+    }
+    return $result;
+}
+
+sub end_languageblock {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result;
+    if ($target eq "edit") {
+	$result.= &Apache::edit::tag_end($target,$token,'');
+    }
+    return $result;
+}
+
+sub start_instructorcomment {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+
+    my $result;
+
+    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
+	$target eq 'tex' || $target eq 'analyze') {
+        $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
+	if ( ! $result ) {
+	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
+						   $parser,$style);
+	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
+	}
+	$result='';
+    } elsif ($target eq 'edit') {
+	$result .=&Apache::edit::tag_start($target,$token);
+	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
+    }
+    return $result;
+}
+
+sub end_instructorcomment {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result;
+    if ($target eq "edit") {
+	$result.= &Apache::edit::tag_end($target,$token,'');
+    }
+    return $result;
+}
+
 sub start_while {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
 
-    &Apache::lonxml::debug('starting while');
     my $result;
-    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || 
+    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
 	$target eq 'tex' || $target eq 'analyze') {
 	my $code = $token->[2]->{'condition'};
 
@@ -593,14 +801,16 @@ sub start_while {
 	    &Apache::lonxml::default_homework_load($safeeval);
 	}
 	my $result = &Apache::run::run($code,$safeeval);
-	my $bodytext=$$parser[-1]->get_text("/while");
+	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
 	push( @Apache::structuretags::whilebody, $bodytext);
+	push( @Apache::structuretags::whileline, $token->[5]);
+	&Apache::lonxml::debug("s code $code got -$result-");
 	if ( $result ) {
 	    &Apache::lonxml::newparser($parser,\$bodytext);
 	}
     } elsif ($target eq 'edit') {
 	$result .=&Apache::edit::tag_start($target,$token);
-	$result .=&Apache::edit::text_arg('Test Condition:','condition',
+	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
 					  $token,40);
 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
     } elsif ($target eq 'modified') {
@@ -613,17 +823,26 @@ sub start_while {
 
 sub end_while {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
-    &Apache::lonxml::debug('ending while');
-
     my $result;
 
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
 	$target eq 'tex' || $target eq 'analyze') {
 	my $code = pop(@Apache::structuretags::whileconds);
 	my $bodytext = pop(@Apache::structuretags::whilebody);
-	my $result = &Apache::run::run($code,$safeeval);
-	if ( $result ) {
-	    &Apache::lonxml::newparser($parser,\$bodytext);
+	my $line = pop(@Apache::structuretags::whileline);
+	my $return = &Apache::run::run($code,$safeeval);
+	my $starttime=time;
+	my $error=0;
+	while ($return) {
+	    if (time-$starttime >
+		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
+		$return = 0; $error=1; next;
+	    }
+	    $result.=&Apache::scripttag::xmlparse($bodytext);
+	    $return = &Apache::run::run($code,$safeeval);
+	}
+	if ($error) {
+	    &Apache::lonxml::error('<pre>'.&mt('Code ran too long. It ran for more than').' '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' '.&mt('seconds occured while running &lt;while$gt; on line').' '.$line.'</pre>');
 	}
     } elsif ($target eq "edit") {
 	$result.= &Apache::edit::tag_end($target,$token,'');
@@ -720,13 +939,20 @@ sub start_part {
     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
     if ($id eq '') { $id = $Apache::lonxml::curdepth; }
     $Apache::inputtags::part=$id;
-    @Apache::inputtags::responselist = ();
+    push(@Apache::inputtags::partlist,$id);
+    @Apache::inputtags::response=();
     @Apache::inputtags::previous=();
     @Apache::inputtags::previous_version=();
+    $Apache::lonhomework::problemstatus=
+	&Apache::lonnet::EXT("resource.$id.problemstatus");
     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
+    my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
+    &Apache::run::run($expression,$safeeval);
 
     if ($target eq 'meta') {
-	return &Apache::response::mandatory_part_meta;
+	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
+	return &Apache::response::mandatory_part_meta.
+	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
     } elsif ($target eq 'web' || $target eq 'grade' ||
 	     $target eq 'answer' || $target eq 'tex') {
 	if ($hidden) {
@@ -737,18 +963,36 @@ sub start_part {
 	    my $expression='$external::datestatus="'.$status.'";';
 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
 	    &Apache::run::run($expression,$safeeval);
-	    if ( $status eq 'CLOSED' ) {
+	    if (( $status eq 'CLOSED' ) ||
+		( $status eq 'UNCHECKEDOUT') ||
+		( $status eq 'BANNED') ||
+		( $status eq 'UNAVAILABLE') ||
+		( $status eq 'INVALID_ACCESS')) {
 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
 		if ( $target eq "web" ) {
-		    $result="<br />Part is not open to be viewed. It $accessmsg<br />";
+		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
 		} elsif ( $target eq 'tex' ) {
-		    $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
+		    if (not $ENV{'form.problem_split'}=~/yes/) {
+			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
+		    } else {
+			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
+		    }
 		}
 	    } else {
 		if ($target eq 'tex') {
-		    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
+		    if (not $ENV{'form.problem_split'}=~/yes/) {
+			$result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
+		    }
 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
-		    if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
+		    my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
+		    my @allkeys = split /,/,$allkeys;
+		    my $allow_print_points = 0;
+		    foreach my $partial_key (@allkeys) {
+			if ($partial_key=~m/\_(\d*)\_weight/) {
+			    if ($1 ne '0') {$allow_print_points=1;}
+			}
+		    }
+		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
 		}
 	    }
 	}
@@ -756,11 +1000,15 @@ sub start_part {
 	$result.=&Apache::edit::tag_start($target,$token);
 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
+	    '&nbsp;&nbsp;'.
+&Apache::edit::text_arg('Displayed Part Description:','display',$token).
 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
     } elsif ($target eq 'modified') {
 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
-						     $safeeval,'id');
+						     $safeeval,'id','display');
 	if ($constructtag) {
+	    #limiting ids to only letters numbers, and space
+	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
 	    $result = &Apache::edit::rebuild_tag($token);
 	    $result.=&Apache::edit::handle_insert();
 	}
@@ -781,8 +1029,12 @@ sub end_part {
     } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
 							$target);
-	if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
+	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
+	    $gradestatus='';
+	}
 	$result=$gradestatus;
+    } elsif ($target eq 'edit') {
+	$result=&Apache::edit::end_table();
     }
     pop @Apache::inputtags::status;
     $Apache::inputtags::part='';
@@ -869,28 +1121,19 @@ sub end_startouttext {
 
     if ($target eq 'edit') {
 	$text=&Apache::lonxml::get_all_text("endouttext",$parser);
-	$result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
-<td>Delete:".
+	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
+<td>".&mt('Delete:').
                  &Apache::edit::deletelist($target,$token)
 		 ."</td>
 <td>".
                  &Apache::edit::insertlist($target,$token).
 		 &Apache::edit::end_row().
                  &Apache::edit::start_spanning_row()."\n"
-		 .'<table><tr><td>'.
-		 &Apache::loncommon::help_open_topic("Greek_Symbols",
-						     'Greek Symbols',
-						     undef,undef,600)
-		 .'</td><td>'.
-		 &Apache::loncommon::help_open_topic("Other_Symbols",
-						     'Other Symbols',
-						     undef,undef,600)
-		 .'</td></tr></table>'.
+		 . &Apache::loncommon::helpLatexCheatsheet () .
 		 &Apache::edit::editfield($token->[1],$text,"",80,4);
     }
     if ($target eq 'modified') {
-	$text=&Apache::lonxml::get_all_text("endouttext",$parser);
-	$result='<startouttext />'.&Apache::edit::modifiedfield();
+	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
     }
     if ($target eq 'tex') {
 	$result .= '\noindent ';
@@ -929,5 +1172,23 @@ sub delete_startouttext {
     return 1;
 }
 
+sub start_simpleeditbutton {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
+    my $result='';
+    if (($target eq 'web') &&
+        (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'}))) {
+        my $url=$ENV{'request.noversionuri'};
+        $url=~s/\?.*$//;
+	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
+                '<a href="'.$url.'/smpedit">'.&mt('Simple Problem Editor').'</a> - '.&mt('Note: it can take up to 10 minutes for changes to take effect for all users.').
+&Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
+    }
+    return $result;
+}
+
+sub end_simpleeditbutton {
+    return '';
+}
+
 1;
 __END__