--- loncom/homework/structuretags.pm	2024/02/28 00:19:04	1.512.2.24.2.13
+++ loncom/homework/structuretags.pm	2019/11/07 02:58:37	1.570
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.512.2.24.2.13 2024/02/28 00:19:04 raeburn Exp $
+# $Id: structuretags.pm,v 1.570 2019/11/07 02:58:37 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -62,14 +62,12 @@ use Apache::lonxml;
 use Apache::londefdef;
 use Apache::lonenc();
 use Apache::loncommon();
-use Apache::lonnavmaps;
 use Time::HiRes qw( gettimeofday tv_interval );
-use HTML::Entities();
 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'));
 }
 
 
@@ -194,6 +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 $result='';
@@ -228,9 +248,11 @@ sub end_tex {
 sub homework_js {
     my ($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';
@@ -272,8 +294,8 @@ sub homework_js {
         $jstimeout = 1000 * $timeout;
     }
     return &Apache::loncommon::resize_textarea_js().
-           &Apache::loncommon::colorfuleditor_js().
-           &Apache::lonxml::setmode_javascript().
+                &Apache::loncommon::colorfuleditor_js().
+           &setmode_javascript().
 	<<"JS";
 <script type="text/javascript">
 // <![CDATA[
@@ -319,7 +341,7 @@ var keypresshandled = 0;
 var postsubmit = '$postsubmit';
 
 \$(document).ready(function(){
-  if (postsubmit != 'off') {
+  if (postsubmit != 'off') {    
     \$(document).keypress(function(event){
         var keycode = (event.keyCode ? event.keyCode : event.which);
         if ((keycode == '13') && (keypresshandled == 0)) {
@@ -385,6 +407,21 @@ var postsubmit = '$postsubmit';
 JS
 }
 
+sub setmode_javascript {
+    return <<"ENDSCRIPT";
+<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>
+ENDSCRIPT
+}
+
 sub page_start {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
 	$extra_head)=@_;
@@ -406,7 +443,7 @@ sub page_start {
     if (&Apache::lonhtmlcommon::htmlareabrowser()) {
         my %textarea_args;
         if (($env{'request.state'} ne 'construct') ||
-            (&Apache::loncommon::nocodemirror())) {
+            ($env{'environment.nocodemirror'})) {
             %textarea_args = (
                                 dragmath => 'math',
                               );
@@ -481,9 +518,9 @@ sub page_start {
             }
         }
         if ($needs_upload) {
-            $extra_head .= &Apache::lonhtmlcommon::file_submissionchk_js().
-                           '<script type="text/javascript" '.
-                           'src="/res/adm/includes/file_upload.js"></script>';
+            $extra_head .= &Apache::lonhtmlcommon::file_submissionchk_js()
+                            .'<script type="text/javascript" 
+                                src="/res/adm/includes/file_upload.js"></script>';
         }
     }
 
@@ -514,23 +551,25 @@ 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,
@@ -585,9 +624,7 @@ sub page_start {
         my ($symb,$courseid,$udom,$uname)=&Apache::lonnet::whichuser();
         my ($path,$multiresp) = 
             &Apache::loncommon::get_turnedin_filepath($symb,$uname,$udom);
-        if ($env{'request.user_in_effect'}) {
-            $form_tag_start .= ' onsubmit="preventDefault();"';
-        } elsif (($is_task) || ($needs_upload)) {
+        if (($is_task) || ($needs_upload)) {
             $form_tag_start .= ' onsubmit="return file_submission_check(this,'."'$path','$multiresp'".');"';
         }
 	$form_tag_start.='>'."\n";
@@ -630,7 +667,7 @@ sub get_resource_name {
 }
 
 sub setup_rndseed {
-    my ($safeeval,$target,$probpartlist)=@_;
+    my ($safeeval,$target,$probpartlist,$prevparttype)=@_;
     my ($symb)=&Apache::lonnet::whichuser();
     my ($questiontype,$set_safespace,$rndseed,$numtries,$reqtries);
     if ($target eq 'analyze') {
@@ -681,7 +718,7 @@ sub setup_rndseed {
                 $env{'form.rndseed'}=$rndseed;
             }
 	}
-        if ((($env{'request.state'} eq "construct") || ($symb eq '')) &&
+        if ((($env{'request.state'} eq "construct") || ($symb eq '')) && 
             ($Apache::lonhomework::type eq 'randomizetry')) {
             if ($numtries) {
                 if (($reqtries =~ /^\d+$/) && ($reqtries > 1)) {
@@ -747,11 +784,20 @@ sub setup_rndseed {
         if ($target eq 'grade') {
             $Apache::lonhomework::rawrndseed = $rndseed;
         }
+    } elsif ($prevparttype eq 'randomizetry') {
+        if ($env{'form.0.rndseed'} ne '') {
+            $set_safespace = 1;
+            $rndseed = $env{'form.0.rndseed'};
+        }
     }
     if ($set_safespace) {
         if ($safeeval) {
             &Apache::lonxml::debug("Setting rndseed to $rndseed");
             &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
+            if (($Apache::lonhomework::type eq 'randomizetry') || ($prevparttype eq 'randomizetry')) {
+                &Apache::lonxml::debug("Setting randomizetrypart to $Apache::inputtags::part");
+                &Apache::run::run('$external::randomizetrypart="'.$Apache::inputtags::part.'";',$safeeval);
+            }
         }
     }
     unless (($env{'request.state'} eq "construct") || ($symb eq '')) {
@@ -776,18 +822,13 @@ sub problem_edit_action_button {
 
 sub problem_edit_buttons {
    my ($mode)=@_;
-   my %editors = &Apache::loncommon::permitted_editors();
 # Buttons that save
    my $result = '<div style="float:right">';
    if ($mode eq 'editxml') {
-       if ($editors{'xml'}) {
-           $result.=&problem_edit_action_button('subsaveedit','saveeditxml','s','Save and EditXML');
-       }
+       $result.=&problem_edit_action_button('subsaveedit','saveeditxml','s','Save and EditXML');
        $result.=&problem_edit_action_button('subsaveview','saveviewxml','v','Save and View');
    } else {
-       if ($editors{'edit'}) {
-           $result.=&problem_edit_action_button('subsaveedit','saveedit','s','Save and Edit');
-       }
+       $result.=&problem_edit_action_button('subsaveedit','saveedit','s','Save and Edit');
        $result.=&problem_edit_action_button('subsaveview','saveview','v','Save and View');
    }
    $result.="\n</div>\n";
@@ -795,23 +836,13 @@ sub problem_edit_buttons {
    $result .= '<div>'.
               &problem_edit_action_button('subdiscview','discard','d','Discard Edits and View',1);
    if ($mode eq 'editxml') {
-       if ($editors{'edit'}) {
-           $result.=&problem_edit_action_button('subedit','edit','e','Edit',1);
-       }
-       if ($editors{'daxe'}) {
-           $result.=&problem_edit_action_button('subdaxe','daxe','w','Edit with Daxe',1);
-       }
+       $result.=&problem_edit_action_button('subedit','edit','e','Edit',1);
        $result.=&problem_edit_action_button('subundo','undoxml','u','Undo',1);
-       if (&Apache::loncommon::nocodemirror()) {
+       if ($env{'environment.nocodemirror'}) {
            $result.=&Apache::lonhtmlcommon::dragmath_button("LC_editxmltext",1);
        }
    } else {
-       if ($editors{'xml'}) {
-           $result.=&problem_edit_action_button('subeditxml','editxml','x','EditXML',1);
-       }
-       if ($editors{'daxe'}) {
-           $result.=&problem_edit_action_button('subdaxe','daxe','w','Edit with Daxe',1);
-       }
+       $result.=&problem_edit_action_button('subeditxml','editxml','x','EditXML',1);
        $result.=&problem_edit_action_button('subundo','undo','u','Undo',1);
    }
    $result.="\n</div>";
@@ -855,7 +886,6 @@ sub problem_edit_header {
     return $return;
 }
 
-
 sub problem_edit_footer {
     my $resource = $env{'request.ambiguous'};
     return '</td></tr></table><br />
@@ -884,7 +914,6 @@ sub option {
 
 sub problem_web_to_edit_header {
     my ($rndseed)=@_;
-    my %editors = &Apache::loncommon::permitted_editors();
     my $result .= '<div class="LC_edit_problem_header">';
 
     if (!$Apache::lonhomework::parsing_a_task) {
@@ -932,7 +961,7 @@ sub problem_web_to_edit_header {
 ".&mt("Problem Type:")."
 <select name='problemtype'>
   <option value=''></option>
-  ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
+  ".&option('exam'   ,'problemtype').&mt("Bubblesheet Exam Problem")."</option>
   ".&option('problem','problemtype').&mt("Homework Problem")."</option>
   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
   ".&option('surveycred' ,'problemtype').&mt("Survey Question (with credit)")."</option>
@@ -1014,20 +1043,15 @@ $show_all
    <hr />
    <div>';
     $result.='<input type="hidden" name="problemmode" value="view" />';
-    if ($editors{'edit'}) {
-        $result .= '<input type="button" name="submitmode" accesskey="e" value="'.&mt('Edit').'" '.
-                   'onclick="javascript:setmode(this.form,'."'edit'".')" />';
-    }
-    if ($editors{'xml'}) {
-        $result .= '<input type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" '.
-                   'onclick="javascript:setmode(this.form,'."'editxml'".')" />';
-    }
-    if (($editors{'daxe'}) &&
-        ($env{'browser.type'} ne 'explorer' || $env{'browser.version'} > 9)) {
+    $result .= '<input type="button" name="submitmode" accesskey="e" value="'.&mt('Edit').'" '.
+               '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" accesskey="w" value="'.&mt('Edit with Daxe').'" '.
-                   'onclick="javascript:setmode(this.form,'."'daxe'".')" />';
+        $result .= '<input type="button" value="'.&mt('Edit with Daxe').'" '.
+                  'onclick="window.open(\''.$daxeurl.'\',\'_blank\');" />';
     }
     $result.='
    </div>
@@ -1055,8 +1079,8 @@ sub initialize_storage {
 	|| $Apache::lonhomework::type eq 'practice') {
 	
 	my $namespace = $symb || $env{'request.uri'};
-        if ($env{'form.resetdata'} eq 'reset_submissions' ||
-            ($env{'form.resetdata'} eq 'new_problem_variation'
+	if ($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);
@@ -1064,7 +1088,7 @@ sub initialize_storage {
 	}
 	%Apache::lonhomework::history=
 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
-	my ($temp)=keys(%Apache::lonhomework::history);
+	my ($temp)=keys(%Apache::lonhomework::history) ;
 	&Apache::lonxml::debug("Return message of $temp");
     } else {
 	%Apache::lonhomework::history=
@@ -1087,13 +1111,13 @@ sub initialize_storage {
         &check_correctness_changes() is called in two circumstances
         in which the results hash is to be stored permanently, for
         grading triggered by a student's submission, where feedback on
-        correctness is to be provided to the student.
+        correctness is to be provided to the student. 
 
         1. Immediately prior to storing the results hash
 
-        To handle the case where a student's submission (and award) were
+        To handle the case where a student's submission (and award) were 
         stored after history was retrieved in &initialize_storage(), e.g.,
-        if a student submitted answers in quick succession (e.g., from
+        if a student submitted answers in quick succession (e.g., from 
         multiple tabs).  &Apache::inputtags::hidealldata() is called for
         any parts with out-of-order storage (i.e., correct then incorrect,
         where awarded >= 1 when correct).
@@ -1103,13 +1127,13 @@ sub initialize_storage {
         To handle the case where lond on the student's homeserver returns
         delay:N -- where N is the number of transactions between the last
         retrieved in &initialize_storage() and the last stored immediately
-        before permanent storage of the current transaction via
-        lond::store_handler().  &Apache::grades::makehidden() is called
+        before permanent storage of the current transaction via 
+        lond::store_handler().  &Apache::grades::makehidden() is called  
         for any parts with out-of-order storage (i.e., correct then incorrect,
         where awarded >= 1 when correct).
 
-	Will call &store_aggregates() to increment totals for attempts,
-	students, and corrects, if running user has student role.
+	Will call &store_aggregates() to increment totals for attempts, 
+        students, and corrects, if running user has student role.
 
 =cut
 
@@ -1122,8 +1146,7 @@ sub finalize_storage {
 	delete(@Apache::lonhomework::results{@remove});
 	my ($symb,$courseid,$domain,$name) = 
 	    &Apache::lonnet::whichuser($given_symb);
-        my ($passback,$pbscope,$pbmap,$pbsymb,$pbtype,$crsdef,$ltinum,
-            $ltiref,$total,$possible,$dopassback);
+        my ($passback,$ltiscope,$ltimap,$ltisymb,$ltiref,$total,$possible,$dopassback);
 	if ($env{'request.state'} eq 'construct' 
 	    || $symb eq ''
 	    || $Apache::lonhomework::type eq 'practice') {
@@ -1137,16 +1160,11 @@ sub finalize_storage {
             if (($env{'user.name'} eq $name) && ($env{'user.domain'} eq $domain) &&
                 (!$Apache::lonhomework::scantronmode) && (!defined($env{'form.grade_symb'})) &&
                 (!defined($env{'form.grade_courseid'}))) {
-                if (($env{'request.lti.login'}) || ($env{'request.deeplink.login'})) {
+                if ($env{'request.lti.login'}) {
                     my ($map)=&Apache::lonnet::decode_symb($symb);
                     $map = &Apache::lonnet::clutter($map);
-                    if ($env{'request.lti.login'}) {
-                        ($passback,$pbscope,$pbmap,$pbsymb,$ltinum,$ltiref) =
-                            &needs_lti_passback($courseid,$symb,$map);
-                    } elsif ($env{'request.deeplink.login'}) {
-                        ($passback,$pbscope,$pbmap,$pbsymb,$crsdef,$ltinum,$ltiref) =
-                            &needs_linkprot_passback($courseid,$symb,$map);
-                    }
+                    ($passback,$ltiscope,$ltimap,$ltisymb,$ltiref) = 
+                        &needs_lti_passback($courseid,$symb,$map);
                 }
                 if ($Apache::lonhomework::history{'version'}) {
                     $laststore = $Apache::lonhomework::history{'version'}.'='.
@@ -1243,7 +1261,7 @@ sub finalize_storage {
                     }
                 }
             }
-            if (($dopassback) && ($pbscope eq 'resource') && ($pbsymb eq $symb)) {
+            if (($dopassback) && ($ltiscope eq 'resource') && ($ltisymb eq $symb)) {
                 $total = 0;
                 $possible = 0;
                 my $navmap = Apache::lonnavmaps::navmap->new();
@@ -1284,39 +1302,24 @@ sub finalize_storage {
             &store_aggregates($symb,$courseid);
             if ($dopassback) {
                 my $scoreformat = 'decimal';
-                if (($env{'request.lti.login'}) || ($env{'request.deeplink.login'})) {
-                    if (ref($ltiref) eq 'HASH') {
-                        if ($ltiref->{'scoreformat'} =~ /^(decimal|ratio|percentage)$/) {
-                            $scoreformat = $1;
-                        }
+                if (ref($ltiref) eq 'HASH') {
+                    if ($ltiref->{'scoreformat'} =~ /^(decimal|ratio|percentage)$/) {
+                        $scoreformat = $1;
                     }
                 }
-                my ($pbid,$pburl,$pbtype);
-                if ($env{'request.lti.login'}) {
-                    $pbid = $env{'request.lti.passbackid'};
-                    $pburl = $env{'request.lti.passbackurl'};
-                    $pbtype = 'lti';
-                } elsif ($env{'request.deeplink.login'}) {
-                    $pbid = $env{'request.linkprotpbid'};
-                    $pburl = $env{'request.linkprotpburl'};
-                    $pbtype = 'linkprot';
-                }
                 my $ltigrade = {
-                                 'ltinum'   => $ltinum,
                                  'lti'      => $ltiref,
-                                 'crsdef'   => $crsdef,
                                  'cid'      => $courseid,
                                  'uname'    => $env{'user.name'},
                                  'udom'     => $env{'user.domain'},
-                                 'pbid'     => $pbid,
-                                 'pburl'    => $pburl,
-                                 'pbtype'   => $pbtype,
-                                 'scope'    => $pbscope,
-                                 'pbmap'    => $pbmap,
-                                 'pbsymb'   => $pbsymb,
+                                 'pbid'     => $env{'request.lti.passbackid'},
+                                 'pburl'    => $env{'request.lti.passbackurl'},
+                                 'scope'    => $ltiscope,
+                                 'ltimap'   => $ltimap,
+                                 'ltisymb'  => $ltisymb,
                                  'format'   => $scoreformat,
                                };
-                if ($pbscope eq 'resource') {
+                if ($ltiscope eq 'resource') {
                     $ltigrade->{'total'} = $total;
                     $ltigrade->{'possible'} = $possible;
                 }
@@ -1337,7 +1340,6 @@ sub needs_lti_passback {
             my %lti = &Apache::lonnet::get_domain_lti($cdom,'provider');
             if (ref($lti{$env{'request.lti.login'}}) eq 'HASH') {
                 if ($lti{$env{'request.lti.login'}}{'passback'}) {
-                    my $itemnum = $env{'request.lti.login'};
                     my ($ltiscope,$ltiuri,$ltisymb) =
                         &LONCAPA::ltiutils::lti_provider_scope($env{'request.lti.uri'},
                                                                $cdom,$cnum,1);
@@ -1356,7 +1358,7 @@ sub needs_lti_passback {
                             $passback = 1;
                         }
                     }
-                    return ($passback,$ltiscope,$ltimap,$ltisymb,$itemnum,$lti{$itemnum});
+                    return ($passback,$ltiscope,$ltimap,$ltisymb,$lti{$env{'request.lti.login'}});
                 }
             }
         }
@@ -1364,81 +1366,18 @@ sub needs_lti_passback {
     return;
 }
 
-sub needs_linkprot_passback {
-    my ($courseid,$symb,$map) = @_;
-    if (($env{'request.linkprotpbid'}) && ($env{'request.linkprotpburl'})) {
-        if ($courseid =~ /^($LONCAPA::match_domain)_($LONCAPA::match_courseid)$/) {
-            my ($cdom,$cnum) = ($1,$2);
-            my ($deeplink_symb,$deeplink_map,$deeplink,$passback);
-            $deeplink_symb = &Apache::loncommon::deeplink_login_symb($cnum,$cdom);
-            if ($deeplink_symb) {
-                if ($deeplink_symb =~ /\.(page|sequence)$/) {
-                    $deeplink_map = &Apache::lonnet::deversion((&Apache::lonnet::decode_symb($deeplink_symb))[2]);
-                    my $navmap = Apache::lonnavmaps::navmap->new();
-                    if (ref($navmap)) {
-                        $deeplink = $navmap->get_mapparam(undef,$deeplink_map,'0.deeplink');
-                    }
-                } else {
-                    $deeplink = &Apache::lonnet::EXT('resource.0.deeplink',$deeplink_symb);
-                    $deeplink_map = &Apache::lonnet::deversion((&Apache::lonnet::decode_symb($deeplink_symb))[0]);
-                }
-                if (($deeplink ne '') && ($env{'request.linkprot'} ne '')) {
-                    my ($itemid,$tinyurl) = split(/:/,$env{'request.linkprot'});
-                    if ($itemid =~ /^(\d+)(c|d)$/) {
-                        my ($itemnum,$itemtype) = ($1,$2);
-                        my ($crsdef,$lti_in_use);
-                        if ($itemtype eq 'c') {
-                            $crsdef = 1;
-                            my %crslti = &Apache::lonnet::get_course_lti($cnum,$cdom,'provider');
-                            $lti_in_use = $crslti{$itemnum};
-                        } else {
-                            my %domlti = &Apache::lonnet::get_domain_lti($cdom,'linkprot');
-                            $lti_in_use = $domlti{$itemnum};
-                        }
-                        my ($state,$others,$listed,$scope,$protect,$display,$target,$exit) = split(/,/,$deeplink);
-                        my ($passback,$pbscope);
-                        if ($scope eq 'res') {
-                            if ($deeplink_symb eq $symb) {
-                                $passback = 1;
-                                $pbscope = 'resource';
-                            }
-                        } elsif ($scope eq 'map') {
-                            if (&Apache::lonnet::clutter($deeplink_map) eq $map) {
-                                $passback = 1;
-                                $pbscope = 'nonrec';
-                            }
-                        } elsif ($scope eq 'rec') {
-                            if (&Apache::lonnet::clutter($deeplink_map) eq $map) {
-                                $passback = 1;
-                                $pbscope = 'map';
-                            } else {
-                                my @recurseup = &Apache::lonnet::get_map_hierarchy($map,$env{'request.course.id'});
-                                if (grep(/^\Q$deeplink_map\E$/,@recurseup)) {
-                                    $passback = 1;
-                                    $pbscope = 'map';
-                                }
-                            }
-                        }
-                        return ($passback,$pbscope,$deeplink_map,$deeplink_symb,$crsdef,$itemnum,$lti_in_use);
-                    }
-                }
-            }
-        }
-    }
-}
-
 =pod
 
 =item check_correctness_changes()
 
         For all parts for which current results contain a solved status
-        of "incorrect_attempted", check if there was a transaction in which
-        solved was set to "correct_by_student" in the time since the last
-        transaction (retrieved when &initialize_storage() was called i.e.,
+        of "incorrect_attempted", check if there was a transaction in which  
+        solved was set to "correct_by_student" in the time since the last 
+        transaction (retrieved when &initialize_storage() was called i.e., 
         when &start_problem() was called), unless:
         (a) questiontype parameter is set to survey or anonymous survey (+/- credit)
         (b) problemstatus is set to no or no_feedback_ever
-        If such a transaction exists, and did not occur after "reset status"
+        If such a transaction exists, and did not occur after "reset status" 
         by a user with grading privileges, then the current transaction is an
         example of an out-of-order transaction (i.e., incorrect occurring after
         correct).  Accordingly, the current transaction should be hidden.
@@ -1532,8 +1471,8 @@ sub store_aggregates {
             } else {
                 $anoncounter{$symb."\0".$part} = 1;
             }
-            my $needsrelease = $Apache::lonnet::needsrelease{'parameter:type:'.$Apache::lonhomework::results{'resource.'.$part.'.type'}};
-            if ($needsrelease) {   
+            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 ($curr_required eq '') {
                     &Apache::lonnet::update_released_required($needsrelease);
@@ -1593,6 +1532,13 @@ sub access_status_msg {
                       &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') {
@@ -1602,20 +1548,17 @@ sub access_status_msg {
         $msg ='\noindent \vskip 1 mm '.
               $startminipage.'\vskip 0 mm';
         if ($status eq 'UNAVAILABLE') {
-            $msg.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.');
-        } elsif ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
-            $msg.=&mt('Problem is not open to be viewed. It')." $accessmsg";
+            $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.');
+            $msg.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
         }
-        $msg .= " \\vskip 0 mm ";
     }
     return $msg;
 }
 
 sub checkin_prompt {
     my ($target,$slot_name,$slot,$type) = @_;
-    my $result;
+    my $result; 
     if ($target eq 'web') {
         $result = &Apache::bridgetask::proctor_validation_screen($slot);
     } elsif ($target eq 'grade') {
@@ -1633,8 +1576,12 @@ sub selfcheckin_resource {
             $Apache::lonhomework::history{'resource.0.checkedin'};
         if ($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);
+                                                      $slot_name,$needsiptied);
             if ($check =~ /^error: /) {
                 &Apache::lonnet::logthis("Error during self-checkin of problem (symb: $symb) using slot: $slot_name");
             } else {
@@ -1659,8 +1606,8 @@ sub checkout_msg {
 		'resource'=>'The resource needs to be checked out',
 		'id_expln'=>'As a resource gets checked out, a unique timestamped ID is given to it, and a permanent record is left in the system.',
                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
-                'checkout'=>'Check out Exam for Viewing',
-		'checkout?'=>'Check out Exam?');
+                'checkout'=>'Check out Bubblesheet Exam for Viewing',
+		'checkout?'=>'Check out Bubblesheet Exam?');
     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
     return (<<ENDCHECKOUT);
 <h2>$lt{'resource'}</h2>
@@ -1699,11 +1646,9 @@ sub firstaccess_msg {
     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
     my $buttontext = &mt('Show Resource');
     my $timertext = &mt('Start Timer?');
-    my $shownsymb = &HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb),'\'"<>&');
     $result .= (<<ENDCHECKOUT);
 <form name="markaccess" method="post" action="$uri">
 <input type="hidden" name="markaccess" value="yes" />
-<input type="hidden" name="symb" value="$shownsymb" />
 <input type="button" name="accessbutton" value="$buttontext" onclick="javascript:if (confirm('$timertext')) { document.markaccess.submit(); }" />
 </form>
 ENDCHECKOUT
@@ -1861,6 +1806,7 @@ 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,$firstaccres);
@@ -1869,7 +1815,7 @@ sub start_problem {
         $target eq 'tex') {
         if ($env{'form.markaccess'}) {
             my @interval=&Apache::lonnet::EXT("resource.0.interval");
-            my ($timelimit) = ($interval[0] =~ /^(\d+)/);
+            my ($timelimit) = split(/_/,$interval[0]);
             my $is_set = &Apache::lonnet::set_first_access($interval[1],$timelimit);
             unless (($is_set eq 'ok') || ($is_set eq 'already_set')) {
                 $firstaccres = $is_set;
@@ -1896,19 +1842,14 @@ sub start_problem {
         }
     }
 
-    if (($target eq 'web') && ($env{'request.user_in_effect'})) {
-        &Apache::lonxml::get_all_text("/problem",$parser,$style);
-        return $result;
-    }
-
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
         $target eq 'tex') {
 
         my ($symb)= &Apache::lonnet::whichuser();
-        ($status,$accessmsg,$slot_name,$slot) =
+        ($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='';}
 
@@ -1971,7 +1912,10 @@ sub start_problem {
         }
         if (($env{'request.state'} ne "construct") &&
             ($Apache::lonhomework::type eq 'randomizetry') &&
-            ($status eq 'CAN_ANSWER')) {
+            ($status eq 'CAN_ANSWER') &&
+            ($env{'course.'.$env{'request.course.id'}.'.type'} ne 'Placement') &&
+            (!$env{'request.role.adv'})) {
+# "New Problem Variation Each Try" header suppressed for Placement Tests, unless course personnel. 
             my @parts;
             if (ref($probpartlist) eq 'ARRAY') {
                 @parts = @{$probpartlist};
@@ -1997,14 +1941,15 @@ 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,
 						       $style);
             if (($status eq 'NOT_YET_VIEWED') && ($firstaccres)) {
                 $result .= '<p class="LC_error">'.
                            &mt('A problem occurred when trying to start the timer.').'</p>';
             }
-            $result .= &access_status_msg('problem',$status,$symb,$target,'',$accessmsg);
+            $result .= &access_status_msg('problem',$status,$symb,$target,$ipused,$accessmsg);
 	} elsif ($status eq 'NEEDS_CHECKIN') {
 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
 						       $style);
@@ -2027,11 +1972,16 @@ sub start_problem {
 	      '<input type="hidden" name="submitted" value="yes" />';
 	    # create a page header and exit
 	    if ($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') {
                     $result.= '<button type="submit" name="resetdata" '.
-                              'value="new_problem_variation">'.&mt('New Problem Variation').'</button>'.
-                              &practice_problem_header().'<hr />';
+                        'value="new_problem_variation">'.&mt('New Problem Variation').'</button>'.
+                        &practice_problem_header().'<hr />';
                 } elsif ($Apache::lonhomework::type eq 'randomizetry') {
                     my $reqtries = &Apache::lonnet::EXT("resource.$Apache::inputtags::part.randomizeontries");
                     my $problemstatus = &get_problem_status($Apache::inputtags::part);
@@ -2176,12 +2126,6 @@ sub end_problem {
 	    }
 	}
 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
-    } elsif ($target eq 'web') {
-        if ($env{'request.user_in_effect'}) {
-            &reset_problem_globals('problem');
-            $result .= &Apache::lonhtmlcommon::set_compute_end_time();
-            return $result;
-        }
     }
 
     my $status=$Apache::inputtags::status['-1'];
@@ -2221,7 +2165,39 @@ 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 = '';
@@ -2275,7 +2251,7 @@ ENDJS
 	    @Apache::inputtags::response=();
 	    $result=&Apache::response::mandatory_part_meta;
 	}
-	$result.=&Apache::response::meta_part_order();
+	$result.=&Apache::response::meta_part_order('problem');
 	$result.=&Apache::response::meta_response_order();
     } elsif ($target eq 'edit') {
 	&Apache::lonxml::debug("in end_problem with $target, edit");
@@ -2296,8 +2272,7 @@ ENDJS
     # computation:
     #
     if ($target eq 'web') {
-        $result .= &Apache::lonhtmlcommon::dash_to_minus_js().
-                   &Apache::lonhtmlcommon::set_compute_end_time();
+        $result .= &Apache::lonhtmlcommon::set_compute_end_time();
         #
         # Closing tags delayed so any <script></script> tags 
         # not in head can appear inside body, for valid xhtml.
@@ -2337,8 +2312,8 @@ sub start_library {
 	$result.=&problem_web_to_edit_header($rndseed);
         if ($Apache::lonhomework::type eq 'practice') {
             $result.= '<button type="submit" name="resetdata" '.
-                      'value="new_problem_variation">'.&mt('New Problem Variation').'</button>'.
-                      &practice_problem_header().'<hr />';
+                'value="new_problem_variation">'.&mt('New Problem Variation').'</button>'.
+                &practice_problem_header().'<hr />';
         }
     }
     return $result;
@@ -2354,6 +2329,7 @@ sub end_library {
 	     && $env{'request.state'} eq "construct") {
 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
     } elsif ($target eq 'meta') {
+        $result.=&Apache::response::meta_part_order('library');
         $result.=&Apache::response::meta_response_order();
     }
     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
@@ -2983,6 +2959,14 @@ sub start_part {
         if (($target eq 'grade') && &Apache::response::submitted()) {
             $Apache::lonhomework::results{"resource.$id.rndseed"}=$rndseed;
         }
+    } elsif (@Apache::inputtags::partlist > 1) {
+        my $prevparttype = &Apache::lonnet::EXT("resource.$Apache::inputtags::partlist[-2].type");
+        if ($prevparttype eq 'randomizetry') {
+            my $rndseed=&setup_rndseed($safeeval,$target,'',$prevparttype);
+            if (($target eq 'grade') && &Apache::response::submitted()) {
+                $Apache::lonhomework::results{"resource.$id.rndseed"}=$rndseed;
+            }
+        }
     } elsif (($target eq 'grade') && &Apache::response::submitted()) {
         $Apache::lonhomework::results{"resource.$id.rndseed"}=$Apache::lonhomework::rawrndseed;
     }
@@ -3059,8 +3043,8 @@ sub start_part {
                     if ($status eq 'CAN_ANSWER') {
                         my $problemstatus = &get_problem_status($Apache::inputtags::part); 
                         my $num = scalar(@Apache::inputtags::partlist)-1;
-                        if ((($Apache::lonhomework::default_type eq 'randomizetry') ||
-                             ($Apache::lonhomework::randomizetrypart)) &&
+                        if ((($Apache::lonhomework::default_type eq 'randomizetry') || 
+                            ($Apache::lonhomework::randomizetrypart)) &&
                             ($Apache::lonhomework::type ne 'randomizetry')) {
                             $result .= &randomizetry_part_header($problemstatus,'none',$num);
                         } elsif ($Apache::lonhomework::type eq 'randomizetry') {
@@ -3120,11 +3104,7 @@ sub end_part {
 	    $gradestatus='';
 	}
 	$result.=$gradestatus;
-        if ($$tagstack[-2] eq 'td' and $target eq 'tex') {
-            if (not $env{'form.problem_split'}=~/yes/) {
-                $result.='\end{minipage}';
-            }
-        }
+	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
     } elsif ($target eq 'edit') {
 	$result.=&Apache::edit::end_table();
     } elsif ($target eq 'modified') {
@@ -3240,7 +3220,7 @@ sub start_problemtype {
 					    ['hide','Hide']]
 					   ,$token);
 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
-					     [ ['exam','Exam/Quiz Problem'],
+					     [ ['exam','Bubblesheet Exam/Quiz Problem'],
 					       ['survey','Survey'],
                                                ['surveycred','Survey (with credit)'],
                                                ['anonsurvey','Anonymous Survey'],
@@ -3289,7 +3269,7 @@ sub end_startouttext {
                  .&Apache::edit::deletelist($target,$token)
                  .'</span></td>'
 	         .'<td><span id="math_'.$areaid.'">';
-	if (&Apache::loncommon::nocodemirror()) {
+	if ($env{'environment.nocodemirror'}) {
 	    $result.=&Apache::lonhtmlcommon::dragmath_button($areaid,1);
 	} else {
 	    $result.='&nbsp;';
@@ -3383,7 +3363,7 @@ 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>';
 }
@@ -3445,7 +3425,7 @@ 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;
 }