--- loncom/homework/structuretags.pm	2008/08/26 03:18:29	1.429
+++ loncom/homework/structuretags.pm	2008/11/25 13:16:17	1.435
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.429 2008/08/26 03:18:29 raeburn Exp $
+# $Id: structuretags.pm,v 1.435 2008/11/25 13:16:17 jms Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -27,6 +27,29 @@
 #
 ###
 
+=pod
+
+=head1 NAME
+
+Apache::structuretags
+
+=head1 SYNOPSIS
+
+
+This is part of the LearningOnline Network with CAPA project
+described at http://www.lon-capa.org.
+
+
+=head1 NOTABLE SUBROUTINES
+
+=over
+
+=item 
+
+=back
+
+=cut
+
 
 package Apache::structuretags; 
 
@@ -36,6 +59,7 @@ use Apache::File();
 use Apache::lonmenu;
 use Apache::lonlocal;
 use Apache::lonxml;
+use Apache::londefdef;
 use Apache::lonenc();
 use Time::HiRes qw( gettimeofday tv_interval );
 use lib '/home/httpd/lib/perl/';
@@ -74,7 +98,14 @@ sub start_tex {
     if ($target ne 'edit' && $target ne 'modified') {
 	my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
 	if ($target eq 'tex') {
-	    return $bodytext.' ';
+	    
+	    # If inside a table, occurrences of \\ must be removed;
+	    # else the table blows up.
+
+	    if (&Apache::londefdef::is_inside_of($tagstack, "table")) {
+		$bodytext =~ s/\\\\//g;
+	    }
+	    return $bodytext.'{}';
 	}
     } elsif ($target eq "edit" ) {
 	my $bodytext = 
@@ -148,8 +179,10 @@ sub page_start {
 
     $extra_head .= &homework_js();
 
-    unless ($env{'environment.wysiwygeditor'} eq 'on') {
-        $extra_head .= &Apache::lonhtmlcommon::dragmath_js();
+    if ($env{'environment.wysiwygeditor'} eq 'on') {
+	$extra_head .= &Apache::lonhtmlcommon::dragmath_js("FCKEditMathPopup");
+    } else {
+        $extra_head .= &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
     }
 
     my %body_args;
@@ -541,12 +574,19 @@ sub initialize_storage {
     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
 }
 
-# -------------------------------------------------------------finalize_storage
-# Stores away the result has to a student's environment
-# checks form.grade_ for specific values, other wises stores
-# to the running users environment
-# Will increment totals for attempts, students, and corrects
-# if running user has student role.  
+=pod
+
+=item finalize_storage()
+
+	Stores away the result has to a student's environment
+	checks form.grade_ for specific values, other wises stores
+	to the running users environment
+	Will increment totals for attempts, students, and corrects
+	if running user has student role.
+	
+=cut
+
+
 sub finalize_storage {
     my ($given_symb) = @_;
     my $result;
@@ -577,10 +617,16 @@ sub finalize_storage {
     return $result;
 }
 
-# -------------------------------------------------------------store_aggregates
-# Sends hash of values to be incremented in nohist_resourcetracker.db
-# for the course. Increments total number of attempts, unique students 
-# and corrects for each part for an instance of a problem, as appropriate.
+=pod
+
+item store_aggregates()
+
+	Sends hash of values to be incremented in nohist_resourcetracker.db
+	for the course. Increments total number of attempts, unique students 
+	and corrects for each part for an instance of a problem, as appropriate.
+	
+=cut
+
 sub store_aggregates {
     my ($symb,$courseid) = @_;
     my %aggregate;
@@ -1392,9 +1438,15 @@ sub end_languageblock {
 	    my $result = &Apache::lonxml::endredirection();
 	    my $which = &Apache::lonxml::get_param('which',$parstack,
 						   $safeeval);
-            foreach my $language (split(/\s*\,\s*/,$which)) {
-               unless ($language=~/\w/) { next; }
-               $available_texts{$language} = $result;
+            if ($which=~/\w/) {
+                $available_texts{$which} = $result;
+            }
+            my $otherlangs = &Apache::lonxml::get_param('other',$parstack,
+                                                        $safeeval);
+            foreach my $language (split(/\s*\,\s*/,$otherlangs)) {
+                if ($language=~/\w/) {
+                    $available_texts{$language} = $result;
+                }
             }
 
 	}
@@ -1493,7 +1545,7 @@ sub end_while {
 	    $return = &Apache::run::run($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>');
+	    &Apache::lonxml::error('<pre>'.&mt('Code ran too long. It ran for more than').' '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' '.&mt('seconds occurred while running &lt;while&gt; on line').' '.$line.'</pre>');
 	}
     } elsif ($target eq "edit") {
 	$result.= &Apache::edit::tag_end($target,$token,'');
@@ -1890,20 +1942,21 @@ sub end_startouttext {
     if ($target eq 'edit') {
 	my $areaid = 'homework_edit_'.$Apache::lonxml::curdepth;
 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
+
 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
 <td>".&mt('Delete:').
                  &Apache::edit::deletelist($target,$token)
 		 ."</td>";
         unless ($env{'environment.wysiwygeditor'} eq 'on') {
-            $result.='<td align="left">'
-                     .&Apache::lonhtmlcommon::dragmath_button($areaid,1)
-		     .'</td>'
-                     .'<td>'
-                     .&Apache::edit::insertlist($target,$token)
-		     .'</td>';
-        }
+	    $result .= '<td align="left">'
+		.&Apache::lonhtmlcommon::dragmath_button($areaid,1)
+		.'</td>'
+		.'<td>'
+		.&Apache::edit::insertlist($target,$token)
+		.'</td>';
+	}
 	$result.='<td align="right" valign="top">' .
-		 &Apache::loncommon::helpLatexCheatsheet().
+	    &Apache::loncommon::helpLatexCheatsheet().
 		 &Apache::edit::end_row().
                  &Apache::edit::start_spanning_row()."\n".
 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
@@ -1985,3 +2038,9 @@ sub practice_problem_header {
 
 1;
 __END__
+
+=pod
+
+=back
+
+=cut