--- loncom/interface/lonprintout.pm	2016/12/06 03:43:46	1.652
+++ loncom/interface/lonprintout.pm	2020/03/03 01:16:35	1.672
@@ -1,7 +1,7 @@
 # The LearningOnline Network
 # Printout
 #
-# $Id: lonprintout.pm,v 1.652 2016/12/06 03:43:46 raeburn Exp $
+# $Id: lonprintout.pm,v 1.672 2020/03/03 01:16:35 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -157,7 +157,7 @@ sub create_incomplete_folder_selstud_hel
 
     my $resource_chooser = &generate_resource_chooser('CHOOSE_INCOMPLETE_PEOPLE_SEQ',
 						      'Select problem(s) to print',
-						      'multichoice="1" toponly="1" addstatus="1" closeallpages="1"',
+						      'multichoice="1" toponly="1" addstatus="1" closeallpages="1" modallink="1"',
 						      'RESOURCES',
 						      'CHOOSE_STUDENTS_INCOMPLETE',
 						      $map,
@@ -206,7 +206,7 @@ sub create_incomplete_course_helper {
     
     my $resource_chooser = &generate_resource_chooser('INCOMPLETE_PROBLEMS_COURSE_RESOURCES',
 						      'Select problem(s) to print',
-						      'multichoice = "1" suppressEmptySequences="0" addstatus="1" closeallpagtes="1"',
+						      'multichoice = "1" suppressEmptySequences="0" addstatus="1" closeallpagtes="1" modallink="1"',
 						      'RESOURCES',
 						      'INCOMPLETE_PROBLEMS_COURSE_STUDENTS',
 						      '',
@@ -252,7 +252,7 @@ sub create_incomplete_folder_helper {
 
     my $resource_chooser = &generate_resource_chooser('CHOOSE_INCOMPLETE_SEQ',
 						      'Select problem(s) to print',
-						      'multichoice="1", toponly ="1", addstatus="1", closeallpages="1"',
+						      'multichoice="1", toponly ="1", addstatus="1", closeallpages="1" modallink="1"',
 						      'RESOURCES',
 						      'PAGESIZE',
 						      $map,
@@ -306,7 +306,8 @@ CHOOSE_STUDENTS
 #     this_state    - State name of the chooser.
 #     prompt_text   - Text to use to prompt user.
 #     resource_options - Resource tag options e.g.
-#                        "multichoice='1', toponly='1', addstatus='1'"
+#                        "multichoice='1', toponly='1', addstatus='1',
+#                         modallink='1'" 
 #                     that control the selection and appearance of the
 #                     resource selector.
 #     variable      - Name of the variable to hold the choice
@@ -846,8 +847,9 @@ sub set_font_size {
     if ($font_size ne '') {
 
 	$text =~ s/\\begin\{document}/\\begin{document}{\\$font_size/;
+        $text =~ s/\\end\{document}/}\\end{document}/;
+
     }
-    $text =~ s/\\end\{document}/}\\end{document}/;
     return $text;
 
 
@@ -889,7 +891,7 @@ sub include_pdf {
     my $londocroot = $Apache::lonnet::perlvar{'lonDocRoot'};
     $file =~ s{(.*)/res/}{$londocroot/res/};
 
-    open(FILE,">>$Apache::lonnet::perlvar{'lonPrtDir'}/$env{'user.name'}_$env{'user.domain'}_printout.dat");
+    open(FILE,">>","$Apache::lonnet::perlvar{'lonPrtDir'}/$env{'user.name'}_$env{'user.domain'}_printout.dat");
     print FILE ("$file\n");
     close (FILE);
 
@@ -1232,7 +1234,7 @@ sub is_valid_alpha_code {
 sub is_code_valid {
     my ($code_value, $code_option) = @_;
     my ($code_type, $code_length) = ('letter', 6);	# defaults.
-    my @lines = &Apache::grades::get_scantronformat_file();
+    my @lines = &Apache::lonnet::get_scantronformat_file();
     foreach my $line (@lines) {
 	my ($name, $type, $length) = (split(/:/, $line))[0,2,4];
 	if($name eq $code_option) {
@@ -1956,7 +1958,7 @@ sub latex_corrections {
 	$result =~ s/(\\end\{document})/\\strut\\vspace\*{-4 mm}\\newline $copyright $end_of_student $1/;
     }
     $result =~ s/\$number_of_columns/$number_of_columns/g;
-    $result =~ s/(\\end\{longtable}\s*)(\\strut\\newline\\noindent\\makebox\[\\textwidth\/$number_of_columns\]\[b\]{\\hrulefill})/$2$1/g;
+    $result =~ s/(\\end\{longtable}\s*)(\\strut\\newline\\noindent\\makebox\[\\textwidth\/$number_of_columns\]\[b\]\{\\hrulefill})/$2$1/g;
     $result =~ s/(\\end\{longtable}\s*)\\strut\\newline/$1/g;
 #-- LaTeX corrections     
     my $first_comment = index($result,'<!--',0);
@@ -2070,16 +2072,28 @@ sub get_textwidth {
 
 sub unsupported {
     my ($currentURL,$mode,$symb)=@_;
+    my $cleanURL=&Apache::lonenc::check_decrypt($currentURL);
+    my $shown = $currentURL;
+    if (($cleanURL ne $currentURL) || ($symb =~ m{/^enc/})) {
+        $shown = &mt('URL not shown (encrypted)');
+    }
     if ($mode ne '') {$mode='\\'.$mode}
-    my $result.= &print_latex_header($mode);
-    if ($currentURL=~m|^(/adm/wrapper/)?ext/|) {
-	$currentURL=~s|^(/adm/wrapper/)?ext/|http://|;
-        $currentURL=~s|^http://https://|https://|;
-	my $title=&Apache::lonnet::gettitle($symb);
-	$title = &Apache::lonxml::latex_special_symbols($title);
-	$result.=' \strut \\\\ '.$title.' \strut \\\\ '.$currentURL.' ';
+    my $result = &print_latex_header($mode);
+    if ($cleanURL=~m|^(/adm/wrapper)?/ext/|) {
+        $cleanURL=~s|^(/adm/wrapper)?/ext/|http://|;
+        $cleanURL=~s|^http://https://|https://|;
+        if ($shown eq $currentURL) {
+            $shown = &Apache::lonxml::latex_special_symbols($cleanURL);
+        }
+        my $title=&Apache::lonnet::gettitle($symb);
+        $title = &Apache::lonxml::latex_special_symbols($title);
+        $result.=' \strut \\\\ \textit{'.$title.'} \strut \\\\ '.$shown.' ';
     } else {
-	$result.=$currentURL;
+        if ($shown eq $currentURL) {
+	    $result.=&Apache::lonxml::latex_special_symbols($currentURL);
+        } else {
+            $result.=$shown;
+        }
     }
     $result.= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill} \end{document}';
     return $result;
@@ -2117,19 +2131,12 @@ sub print_page_in_course {
 								      $numberofcolumns);
     my $LaTeXwidth=&recalcto_mm($textwidth); 
 
-
     if ($mode ne '') {$mode='\\'.$mode}
     my $result   =    &print_latex_header($mode);
-    if ($currentURL=~m|^(/adm/wrapper/)?ext/|) {
-	$currentURL=~s|^(/adm/wrapper/)?ext/|http://|;
-	my $title=&Apache::lonnet::gettitle($symb);
-	$title = &Apache::lonxml::latex_special_symbols($title);
-    } else {
-        my $esc_currentURL= $currentURL;
-        $esc_currentURL =~ s/_/\\_/g;
-	$result.=$esc_currentURL;
-    }
-    $result .= '\\\\';
+
+    my $title=&Apache::lonnet::gettitle($currentURL);
+    $title = &Apache::lonxml::latex_special_symbols($title);
+    $result .= '\noindent\textit{'.$title.'}\\\\';
 
     if ($helper->{'VARS'}->{'style_file'}=~/\w/) {
 	&Apache::lonnet::appenv({'construct.style' =>
@@ -2145,7 +2152,7 @@ sub print_page_in_course {
 
     foreach my $resource (@page_resources) {
 	my $resource_src   = $resource->src(); # Essentially the URL of the resource.
-	$result           .= $resource->title() . '\\\\';
+        my $current_url = $resource->link();
 
 	# Recurse if a .page:
 
@@ -2155,11 +2162,10 @@ sub print_page_in_course {
 	    $result           .= &print_page_in_course($helper, $rparmhash, 
 						       $resource_src, \@page_resources);
         } elsif ($resource->ext()) {
-            $result .= &unsupported($currentURL,$mode,$symb);
-	}
-	# these resources go through the XML transformer:
-
-	elsif ($resource_src =~ /\.(problem|exam|quiz|assess|survey|form|library|xml|html|htm|xhtml|xhtm)$/)  {
+            $result.=&latex_header_footer_remove(&unsupported($current_url,$mode,$resource->symb));
+	} elsif ($resource_src =~ /\.(problem|exam|quiz|assess|survey|form|library|xml|html|htm|xhtml|xhtm)$/)  {
+            # these resources go through the XML transformer:
+            $result .= &Apache::lonxml::latex_special_symbols($resource->title()) . '\\\\';
 
 	    my $urlp = &Apache::lonnet::clutter($resource_src);
 
@@ -2847,9 +2853,10 @@ ENDPART
 		$result = &print_latex_header() . $result;
 	    }
 	    # End construction space sequence.
-	} elsif ($cleanURL=~/\/(smppg|syllabus|aboutme|bulletinboard)$/) { 
+	} elsif ($cleanURL=~/\/(smppg|syllabus|aboutme|bulletinboard|ext\.tool)$/) { 
 		$form{'latex_type'}=$helper->{'VARS'}->{'LATEX_TYPE'};
 		if ($currentURL=~/\/syllabus$/) {$currentURL=~s/\/res//;}
+                if ($currentURL=~/\/ext\.tool$/) {$currentURL=~s/^\/adm\/wrapper//;}
 		$resources_printed .= $currentURL.':';
 		my $texversion = &ssi_with_retries($currentURL, $ssi_retry_count, %form);
 		if ($helper->{'VARS'}->{'PRINT_ANNOTATIONS'} eq 'yes') {
@@ -2935,7 +2942,6 @@ ENDPART
 
 	    &Apache::lonenc::reset_enc();
 
-
 	    # Note due to document structure, not allowed to put \newpage
 	    # prior to the first resource
 
@@ -3046,9 +3052,10 @@ ENDPART
 		}
 		$result .= $texversion;
 		$flag_latex_header_remove = 'YES';   
-	    } elsif ($urlp=~/\/(smppg|syllabus|aboutme|bulletinboard)$/) { 
+	    } elsif ($urlp=~/\/(smppg|syllabus|aboutme|bulletinboard|ext\.tool)$/) { 
 		$form{'latex_type'}=$helper->{'VARS'}->{'LATEX_TYPE'};
 		if ($urlp=~/\/syllabus$/) {$urlp=~s/\/res//;}
+                if ($urlp=~/\/ext\.tool$/) {$urlp=~s/^\/adm\/wrapper//;}
 		$resources_printed .= $urlp.':';
 		my $texversion = &ssi_with_retries($urlp, $ssi_retry_count, %form);
 		if ($helper->{'VARS'}->{'PRINT_ANNOTATIONS'} eq 'yes') {
@@ -3221,7 +3228,7 @@ ENDPART
 	 $result .= $print_array[0].'  \end{document}';
      } elsif (($print_type eq 'problems_for_anon')      ||
 	      ($print_type eq 'problems_for_anon_page') ||
-	      ($print_type eq 'resources_for_anon')  ) { 
+	      ($print_type eq 'resources_for_anon')  ) {
 	 my $cdom =$env{'course.'.$env{'request.course.id'}.'.domain'};
 	 my $cnum =$env{'course.'.$env{'request.course.id'}.'.num'};
 	 my $num_todo=$helper->{'VARS'}->{'NUMBER_TO_PRINT_TOTAL'};
@@ -3230,7 +3237,7 @@ ENDPART
 	 my $single_code = $helper->{'VARS'}->{'SINGLE_CODE'};
 	 my $selected_code = $helper->{'VARS'}->{'CODE_SELECTED_FROM_LIST'};
 	 my $code_option=$helper->{'VARS'}->{'CODE_OPTION'};
-         my @lines = &Apache::grades::get_scantronformat_file();
+         my @lines = &Apache::lonnet::get_scantronformat_file();
 	 my ($code_type,$code_length,$bubbles_per_row)=('letter',6,10);
 	 foreach my $line (@lines) {
              chomp($line);
@@ -3347,7 +3354,7 @@ ENDPART
 	 }
 	 &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
 	 $result .= $print_array[0].'  \end{document}';
-     } elsif ($print_type eq 'problems_from_directory') {      
+     } elsif ($print_type eq 'problems_from_directory') {
     #prints selected problems from the subdirectory 
 	$selectionmade = 6;
         my @list_of_files=split /\|\|\|/, $helper->{'VARS'}->{'FILES'};
@@ -3448,7 +3455,39 @@ ENDPART
 	$URLback=$helper->{'VARS'}->{'filename'};
     } elsif ($helper->{VARS}{'symb'}) {
         my ($map, $id, $url) = &Apache::lonnet::decode_symb($helper->{VARS}{'symb'});
-        $URLback = &Apache::lonnet::clutter($url);
+        my $cdom =$env{'course.'.$env{'request.course.id'}.'.domain'};
+        my $cnum =$env{'course.'.$env{'request.course.id'}.'.num'};
+        my ($anchor,$usehttp,$plainurl);
+        $url = &Apache::lonnet::clutter($url);
+        $plainurl = $url;
+        if (($ENV{'SERVER_PORT'} == 443) && ($env{'request.course.id'}) &&
+            (($url =~ m{^\Q/public/$cdom/$cnum/syllabus\E($|\?)}) ||
+             ($url =~ m{^\Q/adm/wrapper/ext/\E(?!https:)}))) {
+            unless (&Apache::lonnet::uses_sts()) {
+                $usehttp = 1;
+            }
+        }
+        if ($env{'request.enc'}) {
+            $url = &Apache::lonenc::encrypted($url); 
+        }
+        if ($url ne '') {
+            my $symb = $helper->{VARS}{'symb'};
+            if ($url =~ m{^\Q/adm/wrapper/ext/\E}) {
+                my $link = $url;
+                ($link,$anchor) = ($url =~ /^([^\#]+)(?:|(\#[^\#]+))$/);
+                if ($anchor) {
+                    ($symb) = ($helper->{VARS}{'symb'} =~ /^([^\#]+)/);
+                }
+                $url = $link;
+            }
+            $URLback = $url;
+            if ($usehttp) {
+                $URLback .= (($URLback =~ /\?/) ? '&amp;':'?').'usehttp=1';
+            }
+            unless ($plainurl =~ /\.page$/) {
+                $URLback .= (($URLback =~ /\?/) ? '&amp;':'?').'symb='.&escape($symb.$anchor);
+            }
+        }
     }
     #
     # Final adjustment of the font size:
@@ -3532,7 +3571,7 @@ ENDPART
 				'cgi.'.$identifier.'.role' => $perm{'pav'},
 				'cgi.'.$identifier.'.numberoffiles' => $#print_array,
 				'cgi.'.$identifier.'.studentnames' => $student_names,
-				'cgi.'.$identifier.'.backref' => $URLback,});
+				'cgi.'.$identifier.'.backref' => &escape($URLback),});
     &Apache::lonnet::appenv({"cgi.$identifier.user"    => $env{'user.name'},
 				"cgi.$identifier.domain"  => $env{'user.domain'},
 				"cgi.$identifier.courseid" => $cnum, 
@@ -3715,7 +3754,7 @@ sub print_resources {
 			$rendered =~ s/\\end\{document}//;
 		    }
 		    $current_output .= $rendered;		    
-		} elsif ($res_url=~/\/(smppg|syllabus|aboutme|bulletinboard)$/) {
+		} elsif ($res_url=~/\/(smppg|syllabus|aboutme|bulletinboard|ext\.tool)$/) {
 		    if ($i == 1) {
 			$syllabus_first = 1;
 		    }
@@ -4049,10 +4088,11 @@ sub printHelper {
     }
     if ($env{'form.url'}) {
         $helper->{VARS}->{'symb'} = &Apache::lonnet::symbread($helper->{VARS}->{'postdata'});
-
     }
-    $helper->{VARS}->{'symb'}=
-	&Apache::lonenc::check_encrypt($helper->{VARS}->{'symb'});
+    if ($helper->{VARS}->{'symb'} ne '') {
+        $helper->{VARS}->{'symb'}=
+	    &Apache::lonenc::check_encrypt($helper->{VARS}->{'symb'});
+    }
     my ($resourceTitle,$sequenceTitle,$mapTitle) = &details_for_menu($helper);
     if ($sequenceTitle ne '') {$helper->{VARS}->{'assignment'}=$sequenceTitle;}
 
@@ -4063,6 +4103,7 @@ sub printHelper {
     my $subdir;
     my $is_published=0;		# True when printing from resource space.
     my $res_printable = 1;	# By default the current resource is printable.    
+    my $res_error;
     my $userCanPrint = ($perm{'pav'} || $perm{'pfo'});
     my $res_printstartdate;
     my $res_printenddate;
@@ -4084,13 +4125,22 @@ sub printHelper {
 	    ($map, $id, $url) = &Apache::lonnet::decode_symb($symb);
 	    $helper->{VARS}->{'postdata'} = 
 		&Apache::lonenc::check_encrypt(&Apache::lonnet::clutter($url));
-	    my $navmap = Apache::lonnavmaps::navmap->new();
-	    my $res   = $navmap->getBySymb($symb);
-	    $res_printable  = $res->resprintable() || $userCanPrint; #printability in course context
-	    ($res_printstartdate, $res_printenddate) = 	&get_print_dates($res);
-	    ($course_open, $course_close) = &course_print_dates($res);
-	    ($map_open, $map_close)       = &map_print_dates($res);
-
+            if (!$userCanPrint) {
+	        my $navmap = Apache::lonnavmaps::navmap->new();
+                if (ref($navmap)) {
+	            my $res = $navmap->getBySymb($symb);
+                    if (ref($res)) {
+	                $res_printable = $res->resprintable(); #printability in course context
+	                ($res_printstartdate, $res_printenddate) = &get_print_dates($res);
+	                ($course_open, $course_close) = &course_print_dates($res);
+	                ($map_open, $map_close) = &map_print_dates($res);
+                    } else {
+                        $res_error = 1; 
+                    }
+                } else {
+                    $res_error = 1;
+                }
+            }
 	} else {
 	    # Resource space.
 
@@ -4206,7 +4256,7 @@ sub printHelper {
 		}
         my $helperFragment = &generate_resource_chooser('CHOOSE_PROBLEMS_PAGE',
 							'Select Problem(s) to print',
-							"multichoice='1' toponly='1' addstatus='1' closeallpages='1'",
+							"multichoice='1' toponly='1' addstatus='1' closeallpages='1' modallink='1'",
 							'RESOURCES',
 							'PAGESIZE',
 							$url,
@@ -4216,7 +4266,7 @@ sub printHelper {
 
       $helperFragment .= &generate_resource_chooser('CHOOSE_RESOURCES_PAGE',
 						    'Select Resource(s) to print',
-						    'multichoice="1" toponly="1" addstatus="1" closeallpages="1"',
+						    'multichoice="1" toponly="1" addstatus="1" closeallpages="1" modallink="1"',
 						    'RESOURCES',
 						    'PAGESIZE',
 						    $url,
@@ -4281,7 +4331,7 @@ sub printHelper {
 				    'CHOOSE_PROBLEMS_HTML'];
 	    my $helperFragment = &generate_resource_chooser('CHOOSE_PROBLEMS',
 							    'Select Problem(s) to print',
-							    'multichoice="1" toponly="1" addstatus="1" closeallpages="1"',
+							    'multichoice="1" toponly="1" addstatus="1" closeallpages="1" modallink="1"',
 							    'RESOURCES',
 							    'PAGESIZE',
 							    $map,
@@ -4290,7 +4340,7 @@ sub printHelper {
 							    $start_new_option);
 	    $helperFragment .= &generate_resource_chooser('CHOOSE_PROBLEMS_HTML',
 							  'Select Resource(s) to print',
-							  'multichoice="1" toponly="1" addstatus="1" closeallpages="1"',
+							  'multichoice="1" toponly="1" addstatus="1" closeallpages="1" modallink="1"',
 							  'RESOURCES',
 							  'PAGESIZE',
 							  $map,
@@ -4338,7 +4388,7 @@ ALL_PROBLEMS
          &Apache::lonxml::xmlparse($r, 'helper', 
 				   &generate_resource_chooser('ALL_PROBLEMS',
 							      'Select Problem(s) to print',
-							      'multichoice="1" suppressEmptySequences="0" addstatus="1" closeallpages="1"',
+							      'multichoice="1" suppressEmptySequences="0" addstatus="1" closeallpages="1" modallink="1"',
 							      'RESOURCES',
 							      'PAGESIZE',
 							      '',
@@ -4347,7 +4397,7 @@ ALL_PROBLEMS
 							      $start_new_option) .
 				   &generate_resource_chooser('ALL_RESOURCES',
 							      'Select Resource(s) to print',
-							      " toponly='0' multichoice='1' suppressEmptySequences='0' addstatus='1' closeallpages='1'",
+							      " toponly='0' multichoice='1' suppressEmptySequences='0' addstatus='1' closeallpages='1' modallink='1'",
 							      'RESOURCES',
 							      'PAGESIZE',
 							      '',
@@ -4355,7 +4405,7 @@ ALL_PROBLEMS
 							      $start_new_option) .
 				   &generate_resource_chooser('ALL_PROBLEMS_STUDENTS',
 							      'Select Problem(s) to print',
-							      'toponly="0" multichoice="1" suppressEmptySequences="0" addstatus="1" closeallpages="1"',
+							      'toponly="0" multichoice="1" suppressEmptySequences="0" addstatus="1" closeallpages="1" modallink="1"',
 							      'RESOURCES',
 							      'STUDENTS1',
 							      '',
@@ -4399,7 +4449,7 @@ ALL_PROBLEMS
 	#
 	my $resource_selector= &generate_resource_chooser('SELECT_PROBLEMS',
 							  'Select resources to print',
-							  'multichoice="1" addstatus="1" closeallpages="1"',
+							  'multichoice="1" addstatus="1" closeallpages="1" modallink="1"',
 							  'RESOURCES', 
 							  'PRINT_FORMATTING',
 							  $map,
@@ -4410,7 +4460,7 @@ ALL_PROBLEMS
                                                          'PRINT_FORMATTING').
                                &generate_resource_chooser('CHOOSE_STUDENTS_PAGE',
 							'Select Problem(s) to print',
-							"multichoice='1' addstatus='1' closeallpages ='1'",
+							"multichoice='1' addstatus='1' closeallpages ='1' modallink='1'",
 							'RESOURCES',
 							'PRINT_FORMATTING',
 							$url,
@@ -4477,7 +4527,7 @@ ALL_PROBLEMS
 
 	}
 
-        my @lines = &Apache::grades::get_scantronformat_file();
+        my @lines = &Apache::lonnet::get_scantronformat_file();
 	my $codechoice='';
 	foreach my $line (@lines) {
             next if (($line =~ /^\#/) || ($line eq ''));
@@ -4509,7 +4559,7 @@ ALL_PROBLEMS
 						$namechoice) .
 			&generate_resource_chooser('SELECT_PROBLEMS_PAGE',
 						   'Select Problem(s) to print',
-						   "multichoice='1' addstatus='1' closeallpages ='1'",
+						   "multichoice='1' addstatus='1' closeallpages ='1' modallink='1'",
 						   'RESOURCES',
 						   'PRINT_FORMATTING',
 						   $url,
@@ -4533,7 +4583,7 @@ ALL_PROBLEMS
     <nextstate>PRINT_FORMATTING</nextstate>
     <message><br /><big><i><b>Select resources for the assignment</b></i></big><br /></message>
     <resource variable="RESOURCES" multichoice="1" addstatus="1" 
-              closeallpages="1">
+              closeallpages="1" modallink="1">
       <filterfunc>return $isNotMap;</filterfunc>
       <mapurl>$map</mapurl>
       <valuefunc>return $symbFilter;</valuefunc>
@@ -4678,7 +4728,7 @@ CHOOSE_FROM_SUBDIR
   <state name="CHOOSE_FROM_ANY_SEQUENCE" title="Select Resources To Print">
     <message>(mark desired resources then click "next" button) <br /></message>
     <resource variable="RESOURCES" multichoice="1" toponly='1' addstatus="1"
-              closeallpages="1">
+              closeallpages="1" modallink="1">
       <nextstate>PAGESIZE</nextstate>
       <filterfunc>return $isNotMap</filterfunc>
       <mapurl evaluate='1'>return '$escapedSequenceName';</mapurl>
@@ -4689,26 +4739,45 @@ CHOOSE_FROM_SUBDIR
 CHOOSE_FROM_ANY_SEQUENCE
 }
 
+    my $numchoices = 0;
+    if (ref($printChoices) eq 'ARRAY') {
+        $numchoices = @{$printChoices};
+    }
+    # Early out if nothing to print
+    if (!$numchoices) {
+        $r->print(&Apache::loncommon::start_page('Printing Helper').
+                  '<h2>'.&mt('Unable to determine print context').'</h2>'.
+                  '<p>'.&mt('Please display a resource, and then click the "Print" button/icon').'</p>');
+        my $prtspool=$r->dir_config('lonPrtDir');
+        my $footer = &recently_generated($prtspool);
+        $r->print($footer.&Apache::loncommon::end_page());
+        return OK;
+    }
+
     # Generate the first state, to select which resources get printed.
     Apache::lonhelper::state->new("START", "Select Printing Options:");
     if (!$res_printable) {
-        my $now = time;
-        my $shownprintstart = &Apache::lonlocal::locallocaltime($res_printstartdate);
-        my $shownprintend = &Apache::lonlocal::locallocaltime($res_printenddate);
         my $noprintmsg;
-        if (($res_printenddate) && ($res_printenddate < $now)) {
+        if ($res_error) {
+            $noprintmsg = &mt('Print availability for current resource could not be determined');
+        } else {
+            my $now = time;
+            my $shownprintstart = &Apache::lonlocal::locallocaltime($res_printstartdate);
+            my $shownprintend = &Apache::lonlocal::locallocaltime($res_printenddate);
+            if (($res_printenddate) && ($res_printenddate < $now)) {
                 $noprintmsg = &mt('Printing for current resource no longer available (ended: [_1])',
                                   $shownprintend);
-        } else {
-            if (($res_printstartdate) && ($res_printstartdate > $now)) {
-                if (($res_printenddate) && ($res_printenddate > $now) && ($res_printenddate > $res_printstartdate)) {
-                    $noprintmsg = &mt('Printing for current resource is only possible between [_1] and [_2]',
-                                  $shownprintstart,$shownprintend);
-                } elsif (!$res_printenddate) {
-                    $noprintmsg = &mt('Printing for current resource will only be possible starting [_1]',
-                                      $shownprintstart);
-                } else {
-                    $noprintmsg = &mt('Printing for current resource is unavailable');
+            } else {
+                if (($res_printstartdate) && ($res_printstartdate > $now)) {
+                    if (($res_printenddate) && ($res_printenddate > $now) && ($res_printenddate > $res_printstartdate)) {
+                        $noprintmsg = &mt('Printing for current resource is only possible between [_1] and [_2]',
+                                          $shownprintstart,$shownprintend);
+                    } elsif (!$res_printenddate) {
+                        $noprintmsg = &mt('Printing for current resource will only be possible starting [_1]',
+                                          $shownprintstart);
+                    } else {
+                        $noprintmsg = &mt('Printing for current resource is unavailable');
+                    }
                 }
             }
         }
@@ -4764,7 +4833,7 @@ CHOOSE_FROM_ANY_SEQUENCE
             my $xmlfrag = << "FONT_SELECTION";
 
           
-            <dropdown variable='fontsize' multichoice='0', allowempty='0'>
+            <dropdown variable='fontsize' multichoice='0' allowempty='0'>
             <defaultvalue>
 		  return 'normalsize';
             </defaultvalue>