--- loncom/interface/lonmsgdisplay.pm	2020/09/08 23:54:40	1.192
+++ loncom/interface/lonmsgdisplay.pm	2020/11/11 01:27:04	1.193
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Routines for messaging display
 #
-# $Id: lonmsgdisplay.pm,v 1.192 2020/09/08 23:54:40 raeburn Exp $
+# $Id: lonmsgdisplay.pm,v 1.193 2020/11/11 01:27:04 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -2147,8 +2147,28 @@ sub displaymessage {
 
 
     my $number_of_messages = scalar(@messages); #subtract 1 for last index
+    my $head_extra;
+
+# if student's view of resource will be included
+# get <link> tag(s) for css file(s) in use, and pass to &header to include
+# in call to loncommon::start_page()
+
+    if (($env{'request.course.id'} eq $content{'courseid'}) &&
+        (&Apache::lonnet::allowed('vgr',$content{'courseid'}))) {
+        my $symb;
+        if (defined($content{'symb'})) {
+            $symb = $content{'symb'};
+        } elsif (defined($content{'baseurl'})) {
+            $symb=&Apache::lonnet::symbread($content{'baseurl'});
+        }
+        if ($symb) {
+            $head_extra = &Apache::loncommon::css_links($symb);
+        }
+    }
+
 # start output
-    &printheader($r,'/adm/email?display='.&escape($msgid),'Display a Message','',$content{'baseurl'});
+    &printheader($r,'/adm/email?display='.&escape($msgid),'Display a Message','',
+                 $content{'baseurl'},$head_extra);
 
 # Prepare available functions
     my @functionlist;
@@ -2689,13 +2709,16 @@ sub displayresource {
 # ================================================================== The Header
 
 sub header {
-    my ($r,$title,$baseurl)=@_;
+    my ($r,$title,$baseurl,$head_extra)=@_;
     my $extra = &Apache::loncommon::studentbrowser_javascript();
     if ($baseurl) {
 	$extra .= "<base href=\"".&Apache::lonnet::absolute_url()."/$baseurl\" />";
     }
     $extra .= '<script type="text/javascript"
                 src="/res/adm/includes/file_upload.js"></script>';
+    if ($head_extra) {
+        $extra .= "\n$head_extra";
+    }
     $r->print(&Apache::loncommon::start_page('Messages',
  					$extra));
     $r->print(&Apache::lonhtmlcommon::breadcrumbs
@@ -2705,11 +2728,11 @@ sub header {
 # ---------------------------------------------------------------- Print header
 
 sub printheader {
-    my ($r,$url,$desc,$title,$baseurl)=@_;
+    my ($r,$url,$desc,$title,$baseurl,$head_extra)=@_;
     &Apache::lonhtmlcommon::add_breadcrumb
 	({href=>$url,
 	  text=>$desc});
-    &header($r,$title,$baseurl);
+    &header($r,$title,$baseurl,$head_extra);
 }
 
 # ------------------------------------------------------------ Store the comment