--- loncom/interface/lonexttool.pm	2017/12/07 16:06:04	1.10
+++ loncom/interface/lonexttool.pm	2025/03/15 17:28:14	1.27
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Launch External Tool Provider (LTI)
 #
-# $Id: lonexttool.pm,v 1.10 2017/12/07 16:06:04 raeburn Exp $
+# $Id: lonexttool.pm,v 1.27 2025/03/15 17:28:14 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -49,6 +49,10 @@ use HTML::Entities;
 use Apache::lonlocal;
 use Apache::lonnet;
 use Apache::loncommon;
+use Apache::londatecheck;
+use Apache::lonipcheck;
+use Apache::lonhomework;
+use Apache::structuretags;
 use LONCAPA::ltiutils;
 
 sub handler {
@@ -62,12 +66,15 @@ sub handler {
 # ------------------------------------------------------------ Print the screen
     if ($target eq 'tex') {
         $r->print(&Apache::lonprintout::print_latex_header($env{'form.latex_type'}));
+    } else {
+        $target = 'web';
     }
 
 # Is this even in a course?
     unless ($env{'request.course.id'}) {
         if ($target ne 'tex') {
-            &Apache::loncommon::simple_error_page($r,'','Not in a course');
+            &Apache::loncommon::simple_error_page($r,'','Not in a course',
+                                                  {'only_body' => 1});
         } else {
             $r->print('\textbf{Not in a course}\end{document}');
         }
@@ -89,57 +96,47 @@ sub handler {
     my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
     my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
     my $chome = $env{'course.'.$env{'request.course.id'}.'.home'};
-    my $is_tool;
+    my ($idx,$crstool,$is_tool,%toolhash,%toolsettings);
 
     if ($r->uri eq "/adm/$cdom/$cnum/$marker/$exttool") {
-        my %toolsettings=&Apache::lonnet::dump('exttool_'.$marker,$cdom,$cnum);
+        %toolsettings=&Apache::lonnet::dump('exttool_'.$marker,$cdom,$cnum);
         if ($toolsettings{'id'}) {
-            my $idx = $toolsettings{'id'};
-            my %ltitools = &Apache::lonnet::get_domain_lti($cdom,'consumer');
+            my %ltitools;
+            if ($toolsettings{'id'} =~ /^c(\d+)$/) {
+                $idx = $1;
+                $crstool = 1;
+                %ltitools = &Apache::lonnet::get_course_lti($cnum,$cdom,'consumer');
+            } else {
+                $idx = $toolsettings{'id'};
+                %ltitools = &Apache::lonnet::get_domain_lti($cdom,'consumer');
+            }
             if (ref($ltitools{$idx}) eq 'HASH') {
-                my %toolhash = %{$ltitools{$idx}}; 
+                %toolhash = %{$ltitools{$idx}};
                 $toolhash{'display'} = {
                                            target => $toolsettings{'target'},
                                            width  => $toolsettings{'width'},
                                            height => $toolsettings{'height'},
                                        };
-                $toolhash{'crslabel'} = $toolsettings{'crslabel'};
-                $toolhash{'crstitle'} = $toolsettings{'crstitle'};
-                $toolhash{'crsappend'} = $toolsettings{'crsappend'};
-                $is_tool = 1;
-                my $launchok = 1;
-                if ($target eq 'tex') {
-                    $r->print(&mt('External Tool'));
-                } else {
-                    my $now = time;
-                    if ($toolhash{'passback'}) {
-                        if (&LONCAPA::ltiutils::set_service_secret($cdom,$cnum,$marker,'grade',$now,
-                                                                        \%toolsettings,\%toolhash) eq 'ok') {
-                            $toolhash{'gradesecret'} = $toolsettings{'gradesecret'};
-                        } else {
-                            undef($launchok);
-                        }
-                    }
-                    if ($toolhash{'roster'}) {
-                        if (&LONCAPA::ltiutils::set_service_secret($cdom,$cnum,$marker,'roster',$now,
-                                                                \%toolsettings,\%toolhash) eq 'ok') {
-                            $toolhash{'rostersecret'} = $toolsettings{'rostersecret'};
+                foreach my $item (qw(crslabel crstitle crsappend gradable)) {
+                    $toolhash{$item} = $toolsettings{$item};
+                }
+                if ($toolhash{'returnurl'}) {
+                    my $gotreturnurl;
+                    if (ref($toolhash{'crsconf'}) eq 'HASH') {
+                        if ($toolhash{'crsconf'}{'returnurl'}) {
+                            foreach my $item (qw(returnurl backtourl)) {
+                                $toolhash{$item} = $toolsettings{$item};
+                            }
+                            $gotreturnurl = 1;
                         }
                     }
-                    my $submittext = &mt('Launch [_1]',$toolhash{'title'});
-                    if (($toolhash{'key'} ne '') && ($toolhash{'secret'} ne '') && 
-                        ($toolhash{'url'} ne '') && ($launchok)) {
-                        my %lti = &lti_params($r,$cnum,$cdom,$idx,$submittext,\%toolhash);
-                        my $url = $toolhash{'url'};
-                        if ($toolhash{'crsappend'} ne '') {
-                            $url .= $toolhash{'crsappend'};
-                        }
-                        $r->print(&launch_html($url,$toolhash{'key'},$toolhash{'secret'},
-                                               $submittext,\%lti));
-                    } else {
-                        $r->print('<div>'.&mt('External Tool Unavailable').'</div>');
+                    unless ($gotreturnurl) {
+                        $toolhash{'returnurl'} = 'default';
                     }
+                } else {
+                    $toolhash{'returnurl'} = 'none';
                 }
+                $is_tool = 1;
             }
         }
     }
@@ -149,15 +146,110 @@ sub handler {
         } else {
             $r->print('\textbf{'.&mt(Invalid Call).'}\end{document}');
         }
+        return OK;
+    }
+
+    my ($symb,$status,$open,$close,$msg,$donebuttonresult,$donemsg);
+    if (($target eq 'tex') || ($toolhash{'gradable'})) {
+        ($symb) = &Apache::lonnet::whichuser();
+    }
+    if ($target eq 'tex') {
+        my $title = &Apache::lonnet::gettitle($symb);
+        $r->print(&mt('External Tool: [_1]','\textit{'.$title.'}').'\\\\');
+    }
+    if ($toolhash{'gradable'}) {
+        $Apache::lonhomework::browse = &Apache::lonnet::allowed('bre',$r->uri);
+        if ($env{'form.markaccess'}) {
+            my @interval=&Apache::lonnet::EXT('resource.0.interval',$symb);
+            my ($timelimit) = split(/_/,$interval[0]);
+            &Apache::lonnet::set_first_access($interval[1],$timelimit);
+        } elsif ($symb && $env{'form.LC_interval_done'} eq 'true') {
+            # Set the event timer to zero if the "done button" was clicked.  The button is
+            # part of the doneButton form created in lonmenu.pm
+            ($donebuttonresult,$donemsg) = &Apache::lonhomework::zero_timer($symb);
+            undef($env{'form.LC_interval_done'});
+            undef($env{'form.LC_interval_done_proctorpass'});
+        }
+        ($status,$msg) = &gradabletool_access_check($target);
+        undef($Apache::lonhomework::browse);
+        if ($status eq 'SHOW_ANSWER') {
+            $r->print(&display_score($target));
+            if ($target eq 'tex') {
+                $r->print('\end{document}');
+            }
+            return OK;
+        } elsif ($status ne 'CAN_ANSWER') {
+            if ($target eq 'tex') {
+                $r->print('\end{document}');
+            } else {
+                $r->print($msg);
+            }
+            return OK;
+        }
+    } else {
+        my ($status,$open,$close,$msg)=&Apache::londatecheck::content_date_check();
+        if ($status ne 'OPEN') {
+            if ($target eq 'tex') {
+                $r->print(&mt('Not open to be viewed').'\end{document}');
+            } else {
+                $r->print($msg);
+            }
+            return OK;
+        } else {
+            ($status,$msg)=&Apache::lonipcheck::ip_access_check();
+            if ($status ne 'OPEN') {
+                if ($target eq 'tex') {
+                    $r->print(&mt('Not open to be viewed').'\end{document}');
+                } else {
+                    $r->print($msg);
+                }
+                return OK;
+            }
+        }
+    }
+    my $launchok = 1;
+    if ($target eq 'tex') {
+        $r->print('\end{document}');
+    } else {
+        my $now = time;
+        if ($toolhash{'passback'}) {
+            if (&LONCAPA::ltiutils::set_service_secret($cdom,$cnum,$marker,'grade',$now,
+                                                       \%toolsettings,\%toolhash) eq 'ok') {
+                $toolhash{'gradesecret'} = $toolsettings{'gradesecret'};
+            } else {
+                undef($launchok);
+            }
+        }
+        if ($toolhash{'roster'}) {
+            if (&LONCAPA::ltiutils::set_service_secret($cdom,$cnum,$marker,'roster',$now,
+                                                       \%toolsettings,\%toolhash) eq 'ok') {
+                $toolhash{'rostersecret'} = $toolsettings{'rostersecret'};
+            }
+        }
+        my $submittext = &mt('Launch [_1]',$toolhash{'title'});
+        if (($toolhash{'url'} ne '') && ($launchok)) {
+            my %lti = &lti_params($r,$cnum,$cdom,$marker,$exttool,$idx,$submittext,\%toolhash);
+            my $url = $toolhash{'url'};
+            if ($toolhash{'crsappend'} ne '') {
+                $url .= $toolhash{'crsappend'};
+            }
+            my %info = (
+                         method => $toolhash{'sigmethod'},
+                       );
+            $r->print(&launch_html($cdom,$cnum,$crstool,$url,$idx,
+                                   $toolhash{'cipher'},$submittext,\%lti,\%info));
+        } else {
+            $r->print('<div class="LC_warning">'.&mt('External Tool Unavailable').'</div>');
+        }
     }
     return OK;
 }
 
 sub lti_params {
-    my ($r,$cnum,$cdom,$idx,$submittext,$toolsref) = @_;
+    my ($r,$cnum,$cdom,$marker,$exttool,$idx,$submittext,$toolsref) = @_;
     my ($version,$context_type,$msgtype,$toolname,$passback,$roster,$locale,
         $crslabel,$crstitle,$gradesecret,$rostersecret,%fields,%rolesmap,
-        %display,%custom,@userlangs);
+        %display,%custom,@userlangs,$incdom,$returnurl,$backtourl);
     if (ref($toolsref) eq 'HASH') {
         $version = $toolsref->{'version'};
         $toolname = $toolsref->{'title'};
@@ -166,6 +258,7 @@ sub lti_params {
         $roster = $toolsref->{'roster'};
         $rostersecret = $toolsref->{'rostersecret'};
         $msgtype = $toolsref->{'messagetype'};
+        $incdom = $toolsref->{'incdom'};
         if (ref($toolsref->{'fields'}) eq 'HASH') {
             %fields = %{$toolsref->{'fields'}};
         }
@@ -180,6 +273,8 @@ sub lti_params {
         }
         $crslabel = $toolsref->{'crslabel'};
         $crstitle = $toolsref->{'crstitle'};
+        $returnurl = $toolsref->{'returnurl'};
+        $backtourl = $toolsref->{'backtourl'};
     }
     if ($version eq '') {
         $version = 'LTI-1p0';
@@ -191,10 +286,10 @@ sub lti_params {
         $msgtype = 'basic-lti-launch-request';
     }
     if ($crslabel eq '') {
-        $crslabel = $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'},
+        $crslabel = $env{'course.'.$env{'request.course.id'}.'.internal.coursecode'};
     }
     if ($crstitle eq '') {
-        $crstitle = $env{'course.'.$env{'request.course.id'}.'.description'},;
+        $crstitle = $env{'course.'.$env{'request.course.id'}.'.description'};
     }
     my $lonhost = $r->dir_config('lonHostID');
     my $loncaparev = $r->dir_config('lonVersion');
@@ -206,8 +301,10 @@ sub lti_params {
     unless (grep(/^\Q$ltirole\E$/,@possroles)) {
         $ltirole = 'Learner';
     }
-    my $digest_user = &Encode::decode_utf8($uname.':'.$udom);
+    my @possdigest;
+    my $digest_user = &Encode::decode('UTF-8',$uname.':'.$udom);
     $digest_user = &Digest::SHA::sha1_hex($digest_user);
+    push(@possdigest,$digest_user);
     if ($env{'course.'.$env{'request.course.id'}.'.languages'} ne '') {
         @userlangs=(@userlangs,split(/\s*(\,|\;|\:)\s*/,
                     $env{'course.'.$env{'request.course.id'}.'.languages'}));
@@ -225,11 +322,14 @@ sub lti_params {
     if (scalar(@userlangs) == 1) {
         $locale = $userlangs[0];
     }
-    my ($title,$digest_symb);
+    my ($title,$digest_symb,$digest_suppurl,$resource_link_id);
     my ($symb) = &Apache::lonnet::whichuser();
+    my $uri = "/adm/$cdom/$cnum/$marker/$exttool";
     if ($symb) {
-        $digest_symb = &Encode::decode_utf8($symb);
+        $digest_symb = &Encode::decode('UTF-8',$symb);
         $digest_symb = &Digest::SHA::sha1_hex($digest_symb);
+        $resource_link_id = $digest_symb;
+        push(@possdigest,$digest_symb);
         my $navmap = Apache::lonnavmaps::navmap->new();
         if (ref($navmap)) {
             my $res = $navmap->getBySymb($symb);
@@ -237,21 +337,25 @@ sub lti_params {
                 $title = $res->compTitle();
             }
         }
+    } elsif ($env{'httpref.'.$uri} eq '/adm/coursedoc') {
+        $digest_suppurl = &Encode::decode('UTF-8',$uri);
+        $digest_suppurl = &Digest::SHA::sha1_hex($digest_suppurl);
+        $resource_link_id = $digest_suppurl;
     }
     my $domdesc = &Apache::lonnet::domain($cdom);
     my $primary_id = &Apache::lonnet::domain($cdom,'primary');
     my $int_dom = &Apache::lonnet::internet_dom($primary_id);
-    my $portal_url = &Apache::lonnet::course_portal_url($cnum,$cdom);
+    my $portal_url = &Apache::lonnet::course_portal_url($cnum,$cdom,$r);
 
     my %ltiparams = (
         lti_version                            => $version,
         lti_message_type                       => $msgtype,
         resource_link_title                    => $title,
-        resource_link_id                       => $digest_symb,
+        resource_link_id                       => $resource_link_id,
         tool_consumer_instance_guid            => $lonhost,
         tool_consumer_instance_description     => $domdesc,
         tool_consumer_info_product_family_code => 'loncapa',
-        tool_consumer_instance_name            => $int_dom,  
+        tool_consumer_instance_name            => $int_dom,
         tool_consumer_instance_url             => $portal_url,
         tool_consumer_info_version             => $loncaparev,
         user_id                                => $digest_user,
@@ -270,12 +374,17 @@ sub lti_params {
             $crsprotocol = 'http';
         }
         if (($passback) || ($roster)) {
+            my (%currdigest,%digesthash);
+            if (@possdigest) {
+                %currdigest = &Apache::lonnet::get('exttools',\@possdigest,
+                                                   $cdom,$cnum);
+            }
             if ($passback) {
                 $ltiparams{'lis_outcome_service_url'} = $crsprotocol.'://'.$crshostname.'/adm/service/passback';
                 $ltiparams{'ext_ims_lis_basic_outcome_url'} = $ltiparams{'lis_outcome_service_url'};
                 if ($gradesecret) {
                     my $uniqid = $digest_symb.':::'.$digest_user.':::'.$env{'request.course.id'};
-                    $ltiparams{'lis_result_sourcedid'} = &LONCAPA::ltiutils::get_service_id($gradesecret,$uniqid); 
+                    $ltiparams{'lis_result_sourcedid'} = &LONCAPA::ltiutils::get_service_id($gradesecret,$uniqid);
                 }
             }
             if ($roster) {
@@ -287,18 +396,15 @@ sub lti_params {
                     }
                 }
             }
-            my %digesthash;
-            if ($ltiparams{'lis_result_sourcedid'}) {
-                $digesthash{$ltiparams{'lis_result_sourcedid'}} = "$idx\0".time; 
-            }
-            if ($ltiparams{'ext_ims_lis_memberships_id'}) {
-                $digesthash{$ltiparams{'ext_ims_lis_memberships_id'}} = "$idx\0".time; 
-            }
             if (($digest_symb) && ($gradesecret || $rostersecret)) {
-                $digesthash{$digest_symb} = $symb;
+                unless ((exists($currdigest{$digest_symb})) && ($currdigest{$digest_symb} eq $symb)) {
+                    $digesthash{$digest_symb} = $symb;
+                }
             }
             if (($passback) && ($gradesecret)) {
-                $digesthash{$digest_user} = $uname.':'.$udom;
+                unless ((exists($currdigest{$digest_user})) && ($currdigest{$digest_user} eq $uname.':'.$udom)) {
+                    $digesthash{$digest_user} = $uname.':'.$udom;
+                }
             }
             if (keys(%digesthash)) {
                 &Apache::lonnet::put('exttools',\%digesthash,$cdom,$cnum);
@@ -335,7 +441,11 @@ sub lti_params {
         $ltiparams{'lis_person_contact_email_primary'} = $contact_email;
     }
     if ($fields{'user'}) {
-        $ltiparams{'lis_person_sourcedid'} = $uname.':'.$udom;
+        if ($incdom) {
+            $ltiparams{'lis_person_sourcedid'} = $uname.':'.$udom;
+        } else {
+            $ltiparams{'lis_person_sourcedid'} = $uname;
+        }
     }
     if (keys(%custom)) {
         foreach my $key (keys(%custom)) {
@@ -350,15 +460,65 @@ sub lti_params {
         }
     }
     foreach my $key (keys(%ltiparams)) {
-        $ltiparams{$key} = &Encode::decode_utf8($ltiparams{$key});
+        $ltiparams{$key} = &Encode::decode('UTF-8',$ltiparams{$key});
     }
     $ltiparams{'basiclti_submit'} = $submittext;
+    if ($returnurl eq 'default') {
+        my $hostname = &Apache::lonnet::hostname($r->dir_config('lonHostID'));
+        my $protocol = 'http';
+        my $port = $r->get_server_port();
+        if ($port eq '443') {
+            $protocol = 'https';
+        }
+        if (&Apache::lonnet::get_proxy_alias()) {
+            my $hdrhost = $r->headers_in->get('Host');
+            if ($hdrhost ne '') {
+                $hostname = $r->headers_in->get('Host');
+            }
+        }
+        my $location = $protocol.'://'.$hostname;
+        if ($display{'target'} eq 'iframe') {
+            my $return_url;
+            if ($symb) {
+                my ($map,$id,$url)=&Apache::lonnet::decode_symb($symb);
+                my $mapurl = &Apache::lonnet::clutter($map);
+                my $mapsymb = &Apache::lonnet::symbread($map);
+                if ((&Apache::lonnet::EXT('resource.0.encrypturl',$mapsymb) =~ /^yes$/i) &&
+                    (!$env{'request.role.adv'})) {
+                    $return_url = &Apache::lonenc::encrypted($mapurl);
+                } else {
+                    $return_url = $mapurl;
+                }
+                $return_url .= '?navmap=1';
+            } elsif ($env{'httpref.'.$uri} eq '/adm/coursedoc') {
+                $return_url = '/adm/supplemental';
+            } else {
+                $return_url = '/adm/navmaps';
+            }
+            $ltiparams{'launch_presentation_return_url'} = $location.$return_url;
+        } else {
+            $uri = '/adm/wrapper'.$uri;
+            if ($env{'request.enc'}) {
+                $uri = &Apache::lonenc::encrypted($uri);
+            }
+            $ltiparams{'launch_presentation_return_url'} = $location.$uri;
+        }
+    } elsif ($returnurl eq 'custom') {
+        if ($backtourl ne '') {
+            $ltiparams{'launch_presentation_return_url'} = $backtourl;
+        }
+    }
     return %ltiparams;
 }
 
 sub launch_html {
-    my ($url,$key,$secret,$submittext,$paramsref) = @_;
-    my $hashref = &LONCAPA::ltiutils::sign_params($url,$key,$secret,$paramsref);
+    my ($cdom,$cnum,$crstool,$url,$idx,$keynum,$submittext,$paramsref,$inforef) = @_;
+    my ($status,$hashref) =
+        &Apache::lonnet::sign_lti($cdom,$cnum,$crstool,'tools','launch',$url,$idx,$keynum,
+                                  $paramsref,$inforef);
+    unless ($status eq 'ok') {
+        return '<div class="LC_warning">'.&mt('External Tool Unavailable').'</div>';
+    }
     my $action = &HTML::Entities::encode($url,'<>&"');
     my $form = <<"END";
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
@@ -392,4 +552,97 @@ ENDJS
     return $form;
 }
 
+sub gradabletool_access_check {
+    my ($target) = @_;
+    my ($result,$resource_due);
+    my $status;
+    my ($symb,$courseid,$udom,$uname) = &Apache::lonnet::whichuser();
+    my @targets;
+    if ($target) {
+        @targets = ($target);
+    } elsif (defined($env{'form.submitted'}) && defined($env{'form.validate'})) {
+        @targets = ('grade','web');
+    } else {
+        @targets = ('web');
+    }
+    foreach my $target (@targets) {
+        &Apache::structuretags::initialize_storage($symb);
+        &Apache::lonhomework::set_show_problem_status(&Apache::lonnet::EXT('resource.0.problemstatus'));
+        my ($accessmsg,$slot_name,$slot,$ipused);
+        ($status,$accessmsg,$slot_name,$slot,$ipused) =
+            &Apache::lonhomework::check_slot_access('0','tool',$symb);
+        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 'NOTRESERVABLE') ||
+            ( $status eq 'RESERVABLE') ||
+            ( $status eq 'RESERVABLE_LATER') ||
+            ( $status eq 'INVALID_ACCESS') ||
+            ( $status eq 'NEED_DIFFERENT_IP') ||
+            ( $status eq 'WAITING_FOR_GRADE')) {
+            $result = &Apache::structuretags::access_status_msg('tool',$status,$symb,
+                                                                $target,$ipused,$accessmsg);
+        } elsif ($status eq 'NEEDS_CHECKIN') {
+            $result = &Apache::structuretags::checkin_prompt($target,$slot_name,$slot,'tool');
+        } elsif ($target eq 'web') {
+            if ($status eq 'CAN_ANSWER') {
+                $resource_due = &Apache::lonhomework::due_date(0, $env{'request.symb'});
+                if ($slot_name ne '') {
+                    $resource_due = &Apache::structuretags::selfcheckin_resource($resource_due,
+                                                                                 $slot_name,$slot,
+                                                                                 $env{'request.symb'});
+                }
+            }
+        }
+        if (keys(%Apache::lonhomework::results)) {
+            &Apache::structuretags::finalize_storage();
+        }
+    }
+    return ($status,$result,$resource_due);
+}
+
+sub display_score {
+    my ($target) = @_;
+    my $weight = &Apache::lonnet::EXT('resource.0.weight');
+    if ((!defined($weight)) || ($weight eq '')) { $weight=1; }
+    my $awarded = $Apache::lonhomework::history{'resource.0.awarded'};
+    if (!defined($awarded)) { $awarded=0; }
+    my $display='';
+    if ($target eq 'tex') {
+        $display = '\\\\';
+    }
+    if (!defined($awarded)) {
+        $display .= &mt('[_1] possible points.',$weight);
+    } else {
+        my $points = $awarded*$weight;
+        my $result = sprintf('%.2f',$points);
+        $display .= &mt('You have [_1] out of [quant,_2,possible point]',
+                       $result,$weight);
+    }
+    my $comment = $Apache::lonhomework::history{'resource.0.comment'};
+    if (!defined($comment) || $comment!~/\w/) {
+        $comment='';
+    } else {
+        if ($target eq 'tex') {
+            $comment = '\\\\'.$comment;
+        } else {
+            $comment='<br /><table><tr><td bgcolor="#FFFFDD">'.$comment.'</td></tr></table>';
+        }
+    }
+    my $gradeinfo = $Apache::lonhomework::history{'resource.0.gradeinfo'};
+    if (!defined($gradeinfo) || $gradeinfo!~/\w/) {
+        $gradeinfo='';
+    } else {
+        if ($target eq 'tex') {
+            $gradeinfo = '\\\\'.$gradeinfo;
+        } else {
+            $gradeinfo='<br /><table><tr><td bgcolor="#DDDDFF"><font size="+2">'.$gradeinfo.'</font></td></tr></table>';
+        }
+    }
+    return $display.$comment.$gradeinfo;
+}
+
 1;