--- loncom/homework/structuretags.pm	2015/09/14 13:45:19	1.539
+++ loncom/homework/structuretags.pm	2018/03/27 04:36:28	1.558
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.539 2015/09/14 13:45:19 raeburn Exp $
+# $Id: structuretags.pm,v 1.558 2018/03/27 04:36:28 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -67,7 +67,7 @@ use lib '/home/httpd/lib/perl/';
 use LONCAPA;
  
 BEGIN {
-    &Apache::lonxml::register('Apache::structuretags',('block','languageblock','translated','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startpartmarker','startouttext','endpartmarker','endouttext','simpleeditbutton','definetag'));
+    &Apache::lonxml::register('Apache::structuretags',('block','languageblock','translated','instructorcomment','while','randomlist','problem','library','web','print','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startpartmarker','startouttext','endpartmarker','endouttext','simpleeditbutton','definetag'));
 }
 
 
@@ -192,6 +192,28 @@ sub end_web {
     return '';
 }
 
+sub start_print {
+    my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
+    if ($target ne 'edit' && $target ne 'modified') {
+        if ($target ne 'tex') {
+            my $skip = &Apache::lonxml::get_all_text("/print",$parser,$style);
+            &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
+        }
+    } elsif ($target eq "edit") {
+        my $bodytext = &Apache::lonxml::get_all_text_unbalanced("/print",$parser);
+        my $result = &Apache::edit::tag_start($target,$token);
+        $result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
+        return $result;
+    } elsif ($target eq "modified") {
+        return $token->[4].&Apache::edit::modifiedfield("/print",$parser);
+    }
+    return '';
+}
+
+sub end_print {
+    return '';
+}
+
 sub start_tex {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
     my $result='';
@@ -226,9 +248,11 @@ sub end_tex {
 sub homework_js {
     my ($postsubmit,$timeout);
     if (($env{'request.course.id'}) && ($env{'request.state'} ne 'construct')) {
-        my $crstype;
-        if (&Apache::loncommon::course_type() eq 'Community') {
+        my $crstype = &Apache::loncommon::course_type();
+        if ($crstype eq 'Community') {
             $crstype = 'community';
+        } elsif ($crstype eq 'Placement') {
+            $crstype = 'placement'; 
         } else {
             if ($env{'course.'.$env{'request.course.id'}.'.internal.coursecode'}) {
                 $crstype = 'official';
@@ -390,8 +414,10 @@ sub setmode_javascript {
 <script type="text/javascript">
 // <![CDATA[
 function setmode(form,probmode) {
+    var initial = form.problemmode.value;
     form.problemmode.value = probmode;
     form.submit();
+    form.problemmode.value = initial;
 }
 // ]]>
 </script>
@@ -417,9 +443,13 @@ sub page_start {
     $extra_head .= &homework_js().
                    &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
     if (&Apache::lonhtmlcommon::htmlareabrowser()) {
-        my %textarea_args = (
+        my %textarea_args;
+        if (($env{'request.state'} ne 'construct') ||
+            ($env{'environment.nocodemirror'})) {
+            %textarea_args = (
                                 dragmath => 'math',
                               );
+        }
         $extra_head .= &Apache::lonhtmlcommon::htmlareaselectactive(\%textarea_args);
     }
     my $is_task = ($env{'request.uri'} =~ /\.task$/);
@@ -523,23 +553,25 @@ sub page_start {
     } elsif (!defined($found{'body'}) 
 	     && $env{'request.state'} eq 'construct') {
 	if ($target eq 'web' || $target eq 'edit') {
-        # Breadcrumbs for Authoring Space
-        &Apache::lonhtmlcommon::clear_breadcrumbs();
-        &Apache::lonhtmlcommon::add_breadcrumb({
-            'text'  => 'Authoring Space',
-            'href'  => &Apache::loncommon::authorspace($env{'request.uri'}),
-        });
-        # breadcrumbs (and tools) will be created 
-        # in start_page->bodytag->innerregister
+            unless ($env{'form.inhibitmenu'} eq 'yes') {
+                # Breadcrumbs for Authoring Space
+                &Apache::lonhtmlcommon::clear_breadcrumbs();
+                &Apache::lonhtmlcommon::add_breadcrumb({
+                    'text'  => 'Authoring Space',
+                    'href'  => &Apache::loncommon::authorspace($env{'request.uri'}),
+                });
+                # breadcrumbs (and tools) will be created 
+                # in start_page->bodytag->innerregister
 
 # FIXME Where are we?
-#        &Apache::lonhtmlcommon::add_breadcrumb({
-#            'text'  => 'Problem Editing', # 'Problem Testing'
-#            'href'  => '',
-#        });
-        $pageheader =&Apache::loncommon::head_subbox(
-                &Apache::loncommon::CSTR_pageheader());
-	}
+#                &Apache::lonhtmlcommon::add_breadcrumb({
+#                    'text'  => 'Problem Editing', # 'Problem Testing'
+#                    'href'  => '',
+#               });
+                $pageheader = &Apache::loncommon::head_subbox(
+                                 &Apache::loncommon::CSTR_pageheader());
+	    }
+        }
     } elsif (!defined($found{'body'})) {
 	my %add_entries;
 	my $background=&Apache::lonxml::get_param('background',$parstack,
@@ -646,10 +678,11 @@ sub setup_rndseed {
     unless (defined($questiontype)) {
         $questiontype = $Apache::lonhomework::type;
     }
-    if ($env{'request.state'} eq "construct" 
-	|| $symb eq '' 
-	|| $Apache::lonhomework::type eq 'practice'
-	|| $Apache::lonhomework::history{'resource.CODE'}) {
+    if (($env{'request.state'} eq "construct")
+        || ($symb eq '')
+        || ($Apache::lonhomework::type eq 'practice')
+        || ($Apache::lonhomework::history{'resource.CODE'})
+        || (($env{'form.code_for_randomlist'}) && ($target eq 'analyze'))) {
 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
 						['rndseed']);
 	$rndseed=$env{'form.rndseed'};
@@ -658,7 +691,9 @@ sub setup_rndseed {
 	    if (!$rndseed) {
 		$rndseed=time;
 	    }
-	    $env{'form.rndseed'}=$rndseed;
+            unless ($env{'form.code_for_randomlist'}) {
+                $env{'form.rndseed'}=$rndseed;
+            }
 	}
         if (($env{'request.state'} eq "construct") && 
             ($Apache::lonhomework::type eq 'randomizetry')) {
@@ -668,7 +703,7 @@ sub setup_rndseed {
             }
             $env{'form.'.$Apache::inputtags::part.'.rndseed'}=$rndseed;
         }
-	if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
+	if ( ($env{'form.resetdata'} eq 'new_problem_variation'
 	      && $env{'form.submitted'} eq 'yes')  ||
 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
 	    srand(time);
@@ -686,7 +721,11 @@ sub setup_rndseed {
 	       $rndseed=join(':',&Apache::lonnet::digest($rndseed));
             }
         }
-        if ($Apache::lonhomework::history{'resource.CODE'}) {
+        if (($env{'form.code_for_randomlist'}) && ($target eq 'analyze')) {
+            $env{'form.CODE'} = $env{'form.code_for_randomlist'};
+            $rndseed=&Apache::lonnet::rndseed();
+            undef($env{'form.CODE'});
+        } elsif ($Apache::lonhomework::history{'resource.CODE'}) {
 	   $rndseed=&Apache::lonnet::rndseed();
 	}
         $set_safespace = 1;
@@ -770,7 +809,9 @@ sub problem_edit_buttons {
    if ($mode eq 'editxml') {
        $result.=&problem_edit_action_button('subedit','edit','e','Edit',1);
        $result.=&problem_edit_action_button('subundo','undoxml','u','Undo',1);
-       $result.=&Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1);
+       if ($env{'environment.nocodemirror'}) {
+           $result.=&Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1);
+       }
    } else {
        $result.=&problem_edit_action_button('subeditxml','editxml','x','EditXML',1);
        $result.=&problem_edit_action_button('subundo','undo','u','Undo',1);
@@ -943,7 +984,8 @@ $show_all
      </div>
      <input type="submit" name="changeproblemmode" value="'.&mt("Change View").'" />
      <input type="submit" name="clear_style_file" accesskey="d" value="'.&mt('Show Default View').'" />
-     <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
+     <button type="submit" name="resetdata" accesskey="r" value="reset_submissions">
+     '.&mt('Reset Submissions').'</button>
    </div>
    <hr />
    <div class="LC_edit_problem_header_randomize_row">
@@ -976,6 +1018,12 @@ $show_all
                'onclick="javascript:setmode(this.form,'."'edit'".')" />';
     $result .= '<input type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" '.
                'onclick="javascript:setmode(this.form,'."'editxml'".')" />';
+    if ($env{'browser.type'} ne 'explorer' || $env{'browser.version'} > 9) {
+        my $uri = $env{'request.uri'};
+        my $daxeurl = '/daxepage'.$uri;
+        $result .= '<input type="button" value="'.&mt('Edit with Daxe').'" '.
+                  'onclick="window.open(\''.$daxeurl.'\',\'_blank\');" />';
+    }
     $result.='
    </div>
    <hr />
@@ -1002,8 +1050,8 @@ sub initialize_storage {
 	|| $Apache::lonhomework::type eq 'practice') {
 	
 	my $namespace = $symb || $env{'request.uri'};
-	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
-	    ($env{'form.resetdata'} eq &mt('New Problem Variation')
+	if ($env{'form.resetdata'} eq 'reset_submissions' ||
+	    ($env{'form.resetdata'} eq 'new_problem_variation'
 	     && $env{'form.submitted'} eq 'yes') ||
 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
@@ -1278,7 +1326,7 @@ sub store_aggregates {
             } else {
                 $anoncounter{$symb."\0".$part} = 1;
             }
-            my $needsrelease = $Apache::lonnet::needsrelease{'parameter:type:'.$Apache::lonhomework::results{'resource.'.$part.'.type'}.':'};
+            my $needsrelease = $Apache::lonnet::needsrelease{'parameter:type:'.$Apache::lonhomework::results{'resource.'.$part.'.type'}.'::'};
             if ($needsrelease) {
                 my $curr_required = $env{'course.'.$env{'request.course.id'}.'.internal.releaserequired'};
                 if ($curr_required eq '') {
@@ -1307,6 +1355,107 @@ sub store_aggregates {
     }
 }
 
+sub access_status_msg {
+    my ($mode,$status,$symb,$target,$ipused,$accessmsg) = @_;
+    my $msg;
+    if ($target eq 'web') {
+        if ($status eq 'UNAVAILABLE') {
+            $msg.='<p class="LC_error">'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</p>';
+        } elsif ($status eq 'NOT_IN_A_SLOT') {
+            $msg.='<p class="LC_warning">'.&mt('You are not currently signed up to work at this time and/or place.').'</p>';
+        } elsif (($status eq 'RESERVABLE') || ($status eq 'RESERVABLE_LATER') ||
+                 ($status eq 'NOTRESERVABLE')) {
+            $msg.='<p class="LC_warning">'.&mt('Access requires reservation to work at specific time/place.').'</p>';
+        } elsif ($status ne 'NOT_YET_VIEWED') {
+            $msg.='<p class="LC_warning">'.&mt('Not open to be viewed').'</p>';
+        }
+        if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
+            $msg.=&mt('The problem ').$accessmsg;
+        } elsif ($status eq 'UNCHECKEDOUT') {
+            $msg.=&checkout_msg();
+        } elsif ($status eq 'NOT_YET_VIEWED') {
+            $msg.=&firstaccess_msg($accessmsg,$symb);
+        } elsif ($status eq 'NOT_IN_A_SLOT') {
+            $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
+        } elsif ($status eq 'RESERVABLE') {
+            $msg.=&mt('Available to make a reservation.').' '.&mt('Reservation window closes [_1].',
+                      &Apache::lonnavmaps::timeToHumanString($accessmsg,'end')).
+                      '<br />'.
+                      &Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
+        } elsif ($status eq 'RESERVABLE_LATER') {
+            $msg.=&mt('Window to make a reservation will open [_1].',
+                      &Apache::lonnavmaps::timeToHumanString($accessmsg,'start'));
+        } elsif ($status eq 'NOTRESERVABLE') {
+            $msg.=&mt('Not available to make a reservation.');
+        } elsif ($status eq 'NEED_DIFFERENT_IP') {
+            if ($ipused) {
+                $msg.=&mt('You must use the same computer ([_1]) you used when you first accessed this resource using your time/place-based reservation.',"IP: $ipused");
+            } else {
+                $msg.=&mt('Each student must use a different computer to access this resource at this time and/or place.').'<br />'.
+                      &mt('Somebody else has already used this particular computer for that purpose.');
+            }
+        }
+        $msg.='<br />';
+    } elsif ($target eq 'tex') {
+        my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
+                             : '\begin{minipage}{\textwidth}';
+
+        $msg ='\noindent \vskip 1 mm '.
+              $startminipage.'\vskip 0 mm';
+        if ($status eq 'UNAVAILABLE') {
+            $msg.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
+        } else {
+            $msg.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
+        }
+    }
+    return $msg;
+}
+
+sub checkin_prompt {
+    my ($target,$slot_name,$slot,$type) = @_;
+    my $result; 
+    if ($target eq 'web') {
+        $result = &Apache::bridgetask::proctor_validation_screen($slot);
+    } elsif ($target eq 'grade') {
+        if (!&Apache::bridgetask::proctor_check_auth($slot_name,$slot,$type)) {
+            $result = &mt('An error occurred during check-in');
+        }
+    }
+    return $result;
+}
+
+sub selfcheckin_resource {
+    my ($resource_due,$slot_name,$slot,$symb) = @_;
+    if ($slot_name ne '') {
+        my $checked_in =
+            $Apache::lonhomework::history{'resource.0.checkedin'};
+        if ($checked_in eq '') {
+            # unproctored slot access, self checkin
+            my $needsiptied;
+            if (ref($slot)) {
+                $needsiptied = $slot->{'iptied'};
+            }
+            my $check = &Apache::bridgetask::check_in('problem',undef,undef,
+                                                      $slot_name,$needsiptied);
+            if ($check =~ /^error: /) {
+                &Apache::lonnet::logthis("Error during self-checkin of problem (symb: $symb) using slot: $slot_name");
+            } else {
+                $checked_in = $Apache::lonhomework::results{"resource.0.checkedin"};
+            }
+        }
+        if ((ref($slot) eq 'HASH') && ($checked_in ne '')) {
+            if ($slot->{'starttime'} < time()) {
+                if (!$resource_due) {
+                    $resource_due = $slot->{'endtime'};
+                } elsif ($slot->{'endtime'} < $resource_due) {
+                    $resource_due = $slot->{'endtime'};
+                }
+            }
+        }
+    }
+    return $resource_due;
+}
+
 sub checkout_msg {
     my %lt=&Apache::lonlocal::texthash( 
 		'resource'=>'The resource needs to be checked out',
@@ -1510,6 +1659,7 @@ sub start_problem {
     my $status;
     my $accessmsg;
     my $resource_due;
+    my $ipused;
 
     my $name= &get_resource_name($parstack,$safeeval);
     my ($result,$form_tag_start,$slot_name,$slot,$probpartlist);
@@ -1521,10 +1671,6 @@ sub start_problem {
             my ($timelimit) = split(/_/,$interval[0]);
             &Apache::lonnet::set_first_access($interval[1],$timelimit);
         }
-
-        ($status,$accessmsg,$slot_name,$slot) =
-            &Apache::lonhomework::check_slot_access('0','problem');
-        push (@Apache::inputtags::status,$status);
     }
 
     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
@@ -1532,7 +1678,8 @@ sub start_problem {
 	($result,$form_tag_start,$probpartlist) =
 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
 			$name);
-    } elsif (($target eq 'grade') && ($Apache::lonhomework::type eq 'randomizetry')) {
+    } elsif ((($target eq 'grade') && ($Apache::lonhomework::type eq 'randomizetry')) ||
+             ($target eq 'answer')) {
         my ($symb)= &Apache::lonnet::whichuser();
         my $navmap = Apache::lonnavmaps::navmap->new();
         if (ref($navmap)) {
@@ -1543,6 +1690,15 @@ sub start_problem {
         }
     }
 
+    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
+        $target eq 'tex') {
+
+        my ($symb)= &Apache::lonnet::whichuser();
+        ($status,$accessmsg,$slot_name,$slot,$ipused) =
+            &Apache::lonhomework::check_slot_access('0','problem',$symb,$probpartlist);
+        push (@Apache::inputtags::status,$status);
+    }
+
     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
 
     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval,$target); }
@@ -1570,8 +1726,8 @@ sub start_problem {
 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
 		$rndseed.'" />'.
-		    '<input type="submit" name="resetdata"
-                             value="'.&mt('New Problem Variation').'" />';
+		    '<button type="submit" name="resetdata"
+                        value="new_problem_variation">'.&mt('New Problem Variation').'</button>';
 	    if (exists($env{'form.username'})) {
 		$form_tag_start.=
 		    '<input type="hidden" name="username"
@@ -1593,7 +1749,10 @@ sub start_problem {
 	    $form_tag_start.='<hr />';
         } elsif (($env{'request.state'} ne "construct") &&
                  ($Apache::lonhomework::type eq 'randomizetry') &&
-                 ($status eq 'CAN_ANSWER')) {
+                 ($status eq 'CAN_ANSWER') &&
+                 ($env{'course.'.$env{'request.course.id'}.'.type'} ne 'Placement') &&
+                 (!$env{'request.role.adv'})) {
+# "New Problem Variation Each Try" header suppressed for Placement Tests, unless course personnel. 
             my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries");
             my $problemstatus = &get_problem_status($Apache::inputtags::part);
             $form_tag_start.=&randomizetry_problem_header($problemstatus,$reqtries);
@@ -1613,84 +1772,21 @@ sub start_problem {
             ( $status eq 'NOTRESERVABLE') ||
             ( $status eq 'RESERVABLE') ||
             ( $status eq 'RESERVABLE_LATER') ||
-	    ( $status eq 'INVALID_ACCESS')) {
+	    ( $status eq 'INVALID_ACCESS') ||
+            ( $status eq 'NEED_DIFFERENT_IP')) {
 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
 						       $style);
-	    if ( $target eq "web" ) {
-		my $msg;
-		if ($status eq 'UNAVAILABLE') {
-		    $msg.='<p class="LC_error">'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</p>';
-                } elsif ($status eq 'NOT_IN_A_SLOT') {
-                    $msg.='<p class="LC_warning">'.&mt('You are not currently signed up to work at this time and/or place.').'</p>';
-                } elsif (($status eq 'RESERVABLE') || ($status eq 'RESERVABLE_LATER') ||
-                         ($status eq 'NOTRESERVABLE')) {
-                    $msg.='<p class="LC_warning">'.&mt('Access requires reservation to work at specific time/place.').'</p>';
-		} elsif ($status ne 'NOT_YET_VIEWED') {
-		    $msg.='<p class="LC_warning">'.&mt('Not open to be viewed').'</p>';
-                }
-		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
-		    $msg.=&mt('The problem ').$accessmsg;
-		} elsif ($status eq 'UNCHECKEDOUT') {
-		    $msg.=&checkout_msg();
-		} elsif ($status eq 'NOT_YET_VIEWED') {
-		    $msg.=&firstaccess_msg($accessmsg,$symb);
-		} elsif ($status eq 'NOT_IN_A_SLOT') {
-		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
-                } elsif ($status eq 'RESERVABLE') {
-                    $msg.=&mt('Available to make a reservation.').' '.&mt('Reservation window closes [_1].',
-                              &Apache::lonnavmaps::timeToHumanString($accessmsg,'end')).
-                          '<br />'.
-                          &Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
-                } elsif ($status eq 'RESERVABLE_LATER') {
-                    $msg.=&mt('Window to make a reservation will open [_1].',
-                              &Apache::lonnavmaps::timeToHumanString($accessmsg,'start'));
-                } elsif ($status eq 'NOTRESERVABLE') {
-                    $msg.=&mt('Not available to make a reservation.');  
-		}
-		$result.=$msg.'<br />';
-	    } elsif ($target eq 'tex') {
-		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
-		                    : '\begin{minipage}{\textwidth}';
-		$result.='\noindent \vskip 1 mm '.
-		    $startminipage.'\vskip 0 mm';
-		if ($status eq 'UNAVAILABLE') {
-		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
-		} else {
-		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
-		}
-	    }
+            $result .= &access_status_msg('problem',$status,$symb,$target,$ipused,$accessmsg);
 	} elsif ($status eq 'NEEDS_CHECKIN') {
 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
 						       $style);
-	    if ($target eq 'web') {
-		$result .= 
-		    &Apache::bridgetask::proctor_validation_screen($slot);
-	    } elsif ($target eq 'grade') {
-		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
-							'problem');
-	    }
+            $result .= &checkin_prompt($target,$slot_name,$slot,'problem');
 	} elsif ($target eq 'web') {
 	    if ($status eq 'CAN_ANSWER') {
                 $resource_due = &Apache::lonhomework::due_date(0, $env{'request.symb'});
                 if ($slot_name ne '') {
-                    my $checked_in =
-                        $Apache::lonhomework::history{'resource.0.checkedin'};
-                    if ($checked_in eq '') {
-                        # unproctored slot access, self checkin
-                        &Apache::bridgetask::check_in('problem',undef,undef,
-                                                      $slot_name);
-                        $checked_in =
-                            $Apache::lonhomework::results{"resource.0.checkedin"};
-                    }
-                    if ((ref($slot) eq 'HASH') && ($checked_in ne '')) {
-                        if ($slot->{'starttime'} < time()) {
-                            if (!$resource_due) {
-                                $resource_due = $slot->{'endtime'};
-                            } elsif ($slot->{'endtime'} < $resource_due) {
-                                $resource_due = $slot->{'endtime'};
-                            }
-                        }
-                    }
+                    $resource_due = &selfcheckin_resource($resource_due,$slot_name,$slot,
+                                                          $env{'request.symb'});
                 }
                 if ($resource_due) {
                     my $time_left = $resource_due - time();
@@ -1703,11 +1799,16 @@ sub start_problem {
 	      '<input type="hidden" name="submitted" value="yes" />';
 	    # create a page header and exit
 	    if ($env{'request.state'} eq "construct") {
-		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
+                if ($env{'form.inhibitmenu'} eq 'yes') {
+                    # error messages can be useful in any case
+                    $result.= &Apache::lonxml::message_location();
+                } else {
+		    $result.= &problem_web_to_edit_header($env{'form.rndseed'});
+                }
                 if ($Apache::lonhomework::type eq 'practice') {
-                    $result.= '<input type="submit" name="resetdata" '.
-                              'value="'.&mt('New Problem Variation').'" />'.
-                              &practice_problem_header().'<hr />';
+                    $result.= '<button type="submit" name="resetdata" '.
+                        'value="new_problem_variation">'.&mt('New Problem Variation').'</button>'.
+                        &practice_problem_header().'<hr />';
                 }
 	    }
 	    # if we are viewing someone else preserve that info
@@ -1729,8 +1830,6 @@ sub start_problem {
 	} elsif ($target eq 'tex') {
 	    $result .= 'INSERTTEXFRONTMATTERHERE';
 	    $result .= &select_metadata_hyphenation();
-	    
-
 	}
     } elsif ($target eq 'edit') {
 	$result .= $form_tag_start.&problem_edit_header();
@@ -1889,7 +1988,39 @@ sub end_problem {
                 # Added separately at end of this routine, after added
                 # <script></script> so document will be valid xhtml.
                 #
-		$result.= &Apache::loncommon::end_page({'discussion' => 1,
+                my $showdisc = 1;
+                if (($env{'course.'.$env{'request.course.id'}.'.type'} eq 'Placement') &&
+                    (!$env{'request.role.adv'})) { 
+# For Placement Tests footer with "Post Discussion" and "Send Feedback" links is suppressed.
+                    $showdisc = 0;
+                    my ($symb)= &Apache::lonnet::whichuser();
+                    if ($symb) {
+                        my $navmap = Apache::lonnavmaps::navmap->new();
+                        if (ref($navmap)) {
+                            my $hastries = &Apache::lonplacementtest::has_tries($symb,$navmap);  
+# For Placement Tests test status is displayed if this is the last resource in the course
+# and there are no tries left
+                            unless ($hastries) {
+                                if (&Apache::lonplacementtest::is_lastres($symb,$navmap)) {
+                                    my ($score,$incomplete) = 
+                                        &Apache::lonplacementtest::check_completion(undef,undef,1);
+                                    if (!$incomplete) {
+                                        $result .= &Apache::lonplacementtest::showresult(1,1);
+                                    } elsif ($incomplete < 100) { 
+                                        $result.= &Apache::lonplacementtest::showincomplete($incomplete,1);
+                                    }
+                                } else {
+# For Placement Tests score is displayed if test has just been completed
+                                    my ($score,$incomplete) = &Apache::lonplacementtest::check_completion(undef,undef,1);
+                                    if (!$incomplete) {
+                                        $result.= &Apache::lonplacementtest::showresult(1,1);
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+		$result.= &Apache::loncommon::end_page({'discussion' => $showdisc,
 							'notbody'    => 1});
 	    } elsif ($target eq 'tex') {
 		my $endminipage = '';
@@ -1986,9 +2117,9 @@ sub start_library {
 		  '<input type="hidden" name="submitted" value="yes" />';
 	$result.=&problem_web_to_edit_header($rndseed);
         if ($Apache::lonhomework::type eq 'practice') {
-            $result.= '<input type="submit" name="resetdata" '.
-                      'value="'.&mt('New Problem Variation').'" />'.
-                      &practice_problem_header().'<hr />';
+            $result.= '<button type="submit" name="resetdata" '.
+                'value="new_problem_variation">'.&mt('New Problem Variation').'</button>'.
+                &practice_problem_header().'<hr />';
         }
     }
     return $result;
@@ -2003,6 +2134,8 @@ sub end_library {
 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
 	     && $env{'request.state'} eq "construct") {
 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
+    } elsif ($target eq 'meta') {
+        $result.=&Apache::response::meta_response_order();
     }
     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
 	&reset_problem_globals('library');
@@ -2485,7 +2618,12 @@ sub start_randomlist {
 	}
 	if (@randomlist) {
 	    my @idx_arr = (0 .. $#randomlist);
-	    &Apache::structuretags::shuffle(\@idx_arr);
+            if ($env{'form.code_for_randomlist'}) {
+                &Apache::structuretags::shuffle(\@idx_arr,$target);
+                undef($env{'form.code_for_randomlist'});
+            } else {
+                &Apache::structuretags::shuffle(\@idx_arr);
+            }
 	    my $bodytext = '';
 	    my $show=$#randomlist;
 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
@@ -2524,10 +2662,10 @@ sub start_randomlist {
 }
 
 sub shuffle {
-    my $a=shift;
+    my ($a,$target) = @_;
     my $i;
     if (ref($a) eq 'ARRAY' && @$a) {
-	&Apache::response::pushrandomnumber();
+	&Apache::response::pushrandomnumber(undef,$target);
 	for($i=@$a;--$i;) {
 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
 	    next if $i == $j;
@@ -2933,9 +3071,13 @@ sub end_startouttext {
                  .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
                  .&Apache::edit::deletelist($target,$token)
                  .'</span></td>'
-	         .'<td><span id="math_'.$areaid.'">'
-		 .&Apache::lonhtmlcommon::dragmath_button($areaid,1)
-		 .'</span></td>'
+	         .'<td><span id="math_'.$areaid.'">';
+	if ($env{'environment.nocodemirror'}) {
+	    $result.=&Apache::lonhtmlcommon::dragmath_button($areaid,1);
+	} else {
+	    $result.='&nbsp;';
+	}
+	$result.='</span></td>'
 		 .'<td>'
 		 .&Apache::edit::insertlist($target,$token)
 		 .'</td>'
@@ -3024,7 +3166,7 @@ sub end_simpleeditbutton {
 }
 
 sub practice_problem_header {
-    return '<span class="LC_info"><h3>'.&mt('Practice Problem').'</h3></span>'.
+    return '<h3 class="LC_info">'.&mt('Practice Problem').'</h3>'.
            '<span class="LC_info">'.&mt('Submissions are not permanently recorded').
            '</span>';
 }
@@ -3050,7 +3192,7 @@ sub randomizetry_problem_header {
             $text = &mt('A new variation will be generated after each try until correct or tries limit is reached.');
         }
     }
-    return '<span class="LC_info"><h3>'.$header.'</h3></span>'.
+    return '<h3 class="LC_info">'.$header.'</h3>'.
            '<span class="LC_info">'.$text.'</span><hr />';
 }
 
@@ -3081,7 +3223,7 @@ sub randomizetry_part_header {
     if ($num > 1) {
         $output .= '<hr />';
     }
-    $output .=  '<span class="LC_info"><h4>'.$header.'</h4></span>'.
+    $output .=  '<h4 class="LC_info">'.$header.'</h4>'.
                   '<span class="LC_info">'.$text.'</span><br /><br />';
     return $output;
 }