--- loncom/interface/loncommon.pm	2017/11/12 13:15:25	1.1301
+++ loncom/interface/loncommon.pm	2018/01/03 04:20:54	1.1308
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.1301 2017/11/12 13:15:25 raeburn Exp $
+# $Id: loncommon.pm,v 1.1308 2018/01/03 04:20:54 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -4579,9 +4579,15 @@ sub get_previous_attempt {
       }
       $prevattempts.= &end_data_table_row().&end_data_table();
     } else {
+      my $msg;
+      if ($symb =~ /ext\.tool$/) {
+          $msg = &mt('No grade passed back.');
+      } else {
+          $msg = &mt('Nothing submitted - no attempts.');
+      }
       $prevattempts=
 	  &start_data_table().&start_data_table_row().
-	  '<td>'.&mt('Nothing submitted - no attempts.').'</td>'.
+	  '<td>'.$msg.'</td>'.
 	  &end_data_table_row().&end_data_table();
     }
   } else {
@@ -4686,6 +4692,9 @@ sub get_student_view {
   }
   if (defined($target)) { $form{'grade_target'} = $target; }
   $feedurl=&Apache::lonnet::clutter($feedurl);
+  if (($feedurl =~ /ext\.tool$/) && ($target eq 'tex')) {
+      $feedurl =~ s{^/adm/wrapper}{};
+  }
   my ($userview,$response)=&Apache::lonnet::ssi_body($feedurl,%form);
   $userview=~s/\<body[^\>]*\>//gi;
   $userview=~s/\<\/body\>//gi;
@@ -5115,7 +5124,7 @@ sub blockcheck {
                  ($env{'request.role'} !~ m{^st\./\Q$cdom\E/\Q$cnum\E}));
         next if ($no_userblock);
 
-        # Retrieve blocking times and identity of locker for course
+        # Retrieve blocking times and identity of blocker for course
         # of specified user, unless user has 'evb' privilege.
 
         my ($start,$end,$trigger) = 
@@ -8893,8 +8902,9 @@ sub end_togglebox {
 }
 
 sub LCprogressbar_script {
-   my ($id)=@_;
-   return(<<ENDPROGRESS);
+   my ($id,$number_to_do)=@_;
+   if ($number_to_do) {
+       return(<<ENDPROGRESS);
 <script type="text/javascript">
 // <![CDATA[
 \$('#progressbar$id').progressbar({
@@ -8907,21 +8917,39 @@ sub LCprogressbar_script {
 // ]]>
 </script>
 ENDPROGRESS
+   } else {
+       return(<<ENDPROGRESS);
+<script type="text/javascript">
+// <![CDATA[
+\$('#progressbar$id').progressbar({
+  value: false,
+  create: function(event, ui) {
+    \$('.ui-widget-header', this).css({'background':'#F0F0F0'});
+    \$('.ui-progressbar-overlay', this).css({'margin':'0'});
+  }
+});
+// ]]>
+</script>
+ENDPROGRESS
+   }
 }
 
 sub LCprogressbarUpdate_script {
    return(<<ENDPROGRESSUPDATE);
 <style type="text/css">
 .ui-progressbar { position:relative; }
+.progress-label {position: absolute; width: 100%; text-align: center; top: 1px; font-weight: bold; text-shadow: 1px 1px 0 #fff;margin: 0; line-height: 200%; }
 .pblabel { position: absolute; width: 100%; text-align: center; line-height: 1.9em; }
 </style>
 <script type="text/javascript">
 // <![CDATA[
 var LCprogressTxt='---';
 
-function LCupdateProgress(percent,progresstext,id) {
+function LCupdateProgress(percent,progresstext,id,maxnum) {
    LCprogressTxt=progresstext;
-   if (percent === \$('#progressbar'+id).progressbar( "value" )) {
+   if ((maxnum == '') || (maxnum == undefined) || (maxnum == null)) {
+       \$('#progressbar'+id).find('.progress-label').text(LCprogressTxt);
+   } else if (percent === \$('#progressbar'+id).progressbar( "value" )) {
        \$('#progressbar'+id).find('.pblabel').text(LCprogressTxt);
    } else {
        \$('#progressbar'+id).progressbar('value',percent);
@@ -8937,37 +8965,54 @@ my $LCidcnt;
 my $LCcurrentid;
 
 sub LCprogressbar {
-    my ($r)=(@_);
+    my ($r,$number_to_do,$preamble)=@_;
     $LClastpercent=0;
     $LCidcnt++;
     $LCcurrentid=$$.'_'.$LCidcnt;
-    my $starting=&mt('Starting');
-    my $content=(<<ENDPROGBAR);
+    my ($starting,$content);
+    if ($number_to_do) {
+        $starting=&mt('Starting');
+        $content=(<<ENDPROGBAR);
+$preamble
   <div id="progressbar$LCcurrentid">
     <span class="pblabel">$starting</span>
   </div>
 ENDPROGBAR
-    &r_print($r,$content.&LCprogressbar_script($LCcurrentid));
+    } else {
+        $starting=&mt('Loading...');
+        $LClastpercent='false';
+        $content=(<<ENDPROGBAR);
+$preamble
+  <div id="progressbar$LCcurrentid">
+      <div class="progress-label">$starting</div>
+  </div>
+ENDPROGBAR
+    }
+    &r_print($r,$content.&LCprogressbar_script($LCcurrentid,$number_to_do));
 }
 
 sub LCprogressbarUpdate {
-    my ($r,$val,$text)=@_;
-    unless ($val) { 
-       if ($LClastpercent) {
-           $val=$LClastpercent;
-       } else {
-           $val=0;
-       }
+    my ($r,$val,$text,$number_to_do)=@_;
+    if ($number_to_do) {
+        unless ($val) { 
+            if ($LClastpercent) {
+                $val=$LClastpercent;
+            } else {
+                $val=0;
+            }
+        }
+        if ($val<0) { $val=0; }
+        if ($val>100) { $val=0; }
+        $LClastpercent=$val;
+        unless ($text) { $text=$val.'%'; }
+    } else {
+        $val = 'false';
     }
-    if ($val<0) { $val=0; }
-    if ($val>100) { $val=0; }
-    $LClastpercent=$val;
-    unless ($text) { $text=$val.'%'; }
     $text=&js_ready($text);
     &r_print($r,<<ENDUPDATE);
 <script type="text/javascript">
 // <![CDATA[
-LCupdateProgress($val,'$text','$LCcurrentid');
+LCupdateProgress($val,'$text','$LCcurrentid','$number_to_do');
 // ]]>
 </script>
 ENDUPDATE
@@ -9152,14 +9197,21 @@ function expand_div(caller) {
 
 sub simple_error_page {
     my ($r,$title,$msg,$args) = @_;
+    my %displayargs;
     if (ref($args) eq 'HASH') {
         if (!$args->{'no_auto_mt_msg'}) { $msg = &mt($msg); }
+        if ($args->{'only_body'}) {
+            $displayargs{'only_body'} = 1;
+        }
+        if ($args->{'no_nav_bar'}) {
+            $displayargs{'no_nav_bar'} = 1;
+        }
     } else {
         $msg = &mt($msg);
     }
 
     my $page =
-	&Apache::loncommon::start_page($title).
+	&Apache::loncommon::start_page($title,'',\%displayargs).
 	'<p class="LC_error">'.$msg.'</p>'.
 	&Apache::loncommon::end_page();
     if (ref($r)) {
@@ -17268,19 +17320,31 @@ sub update_content_constraints {
     my ($cdom,$cnum,$chome,$cid) = @_;
     my %curr_reqd_hash = &Apache::lonnet::userenvironment($cdom,$cnum,'internal.releaserequired');
     my ($reqdmajor,$reqdminor) = split(/\./,$curr_reqd_hash{'internal.releaserequired'});
-    my %checkresponsetypes;
+    my (%checkresponsetypes,%checkcrsrestypes);
     foreach my $key (keys(%Apache::lonnet::needsrelease)) {
         my ($item,$name,$value) = split(/:/,$key);
         if ($item eq 'resourcetag') {
             if ($name eq 'responsetype') {
                 $checkresponsetypes{$value} = $Apache::lonnet::needsrelease{$key}
             }
+        } elsif ($item eq 'course') {
+            if ($name eq 'courserestype') {
+                $checkcrsrestypes{$value} = $Apache::lonnet::needsrelease{$key};
+            }
         }
     }
     my $navmap = Apache::lonnavmaps::navmap->new();
     if (defined($navmap)) {
-        my %allresponses;
-        foreach my $res ($navmap->retrieveResources(undef,sub { $_[0]->is_problem() },1,0)) {
+        my (%allresponses,%allcrsrestypes);
+        foreach my $res ($navmap->retrieveResources(undef,sub { $_[0]->is_problem() || $_[0]->is_tool() },1,0)) {
+            if ($res->is_tool()) {
+                if ($allcrsrestypes{'exttool'}) {
+                    $allcrsrestypes{'exttool'} ++;
+                } else {
+                    $allcrsrestypes{'exttool'} = 1;
+                }
+                next;
+            }
             my %responses = $res->responseTypes();
             foreach my $key (keys(%responses)) {
                 next unless(exists($checkresponsetypes{$key}));
@@ -17293,8 +17357,24 @@ sub update_content_constraints {
                 ($reqdmajor,$reqdminor) = ($major,$minor);
             }
         }
+        foreach my $key (keys(%allcrsrestypes)) {
+            my ($major,$minor) = split(/\./,$checkcrsrestypes{$key});
+            if (($major > $reqdmajor) || ($major == $reqdmajor && $minor > $reqdminor)) {
+                ($reqdmajor,$reqdminor) = ($major,$minor);
+            }
+        }
         undef($navmap);
     }
+    my $suppmap = 'supplemental.sequence';
+    my ($suppcount,$supptools,$errors) = (0,0,0);
+    ($suppcount,$supptools,$errors) = &recurse_supplemental($cnum,$cdom,$suppmap,
+                                                            $suppcount,$supptools,$errors);
+    if ($supptools) {
+        my ($major,$minor) = split(/\./,$checkcrsrestypes{'exttool'});
+        if (($major > $reqdmajor) || ($major == $reqdmajor && $minor > $reqdminor)) {
+            ($reqdmajor,$reqdminor) = ($major,$minor);
+        }
+    }
     unless (($reqdmajor eq '') && ($reqdminor eq '')) {
         &Apache::lonnet::update_released_required($reqdmajor.'.'.$reqdminor,$cdom,$cnum,$chome,$cid);
     }
@@ -17351,7 +17431,7 @@ sub parse_supplemental_title {
 }
 
 sub recurse_supplemental {
-    my ($cnum,$cdom,$suppmap,$numfiles,$errors) = @_;
+    my ($cnum,$cdom,$suppmap,$numfiles,$numexttools,$errors) = @_;
     if ($suppmap) {
         my ($errtext,$fatal) = &LONCAPA::map::mapread('/uploaded/'.$cdom.'/'.$cnum.'/'.$suppmap);
         if ($fatal) {
@@ -17362,8 +17442,12 @@ sub recurse_supplemental {
                     my ($title,$src,$ext,$type,$status)=split(/\:/,$res);
                     if (($src ne '') && ($status eq 'res')) {
                         if ($src =~ m{^\Q/uploaded/$cdom/$cnum/\E(supplemental_\d+\.sequence)$}) {
-                            ($numfiles,$errors) = &recurse_supplemental($cnum,$cdom,$1,$numfiles,$errors);
+                            ($numfiles,$numexttools,$errors) = &recurse_supplemental($cnum,$cdom,$1,
+                                                                   $numfiles,$numexttools,$errors);
                         } else {
+                            if ($src =~ m{^/adm/$cdom/$cnum/\d+/ext\.tool$}) {
+                                $numexttools ++;
+                            }
                             $numfiles ++;
                         }
                     }
@@ -17371,7 +17455,7 @@ sub recurse_supplemental {
             }
         }
     }
-    return ($numfiles,$errors);
+    return ($numfiles,$numexttools,$errors);
 }
 
 sub symb_to_docspath {