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Diff for /loncom/homework/structuretags.pm between versions 1.17 and 1.186

version 1.17, 2000/11/29 00:51:57 version 1.186, 2003/06/18 22:12:34
Line 1 Line 1
 # The LearningOnline Network with CAPA # <script> definiton  # The LearningOnline Network with CAPA 
   # definition of tags that give a structure to a document
   #
   # $Id$
   #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
   # 2/19 Guy
   # 6/26/2001 fixed extra web display at end of <web></web> tags
   # 8/17,8/18,8/20 Gerd Kortemeyer
   
   
 package Apache::structuretags;   package Apache::structuretags; 
   
 use strict;  use strict;
 use Apache::lonnet;  use Apache::lonnet;
   use Apache::File();
   use Apache::lonmenu;
   
 sub BEGIN {  BEGIN {
   &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','web','tex','part'));      &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
 }  }
   
 sub start_web {  sub start_web {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);      if (!($target eq 'web' || $target eq 'edit' || $target eq 'modified' ||
   return $bodytext;    $target eq 'answer' || $target eq 'grade' || $target eq 'meta' )) {
    my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
       }
       return '';
 }  }
   
 sub end_web {  sub end_web {
       return '';
 }  }
   
 sub start_tex {  sub start_tex {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);      if (!($target eq 'tex' || $target eq 'edit' || $target eq 'modified' ||
   return '';    $target eq 'answer' || $target eq 'grade' || $target eq 'meta' )) {
    &Apache::lonxml::debug("tex 1");
    my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
       }
       return '';
 }  }
   
 sub end_tex {  sub end_tex {
       return '';
   }
   
   sub page_start {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my %found;
       foreach my $taginside ($tagstack) {
    foreach my $taglookedfor ('html','body','form') {
       if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
    }
       }
   
       my $result;
       my $head_tag_start;
       if (!defined($found{'html'})) {
    $result=&Apache::londefdef::start_html($target,$token,$tagstack,
          $parstack,$parser,$safeeval);
    $head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target);
       }
       my $body_tag_start;
       if (!defined($found{'body'})) {
    $body_tag_start='<body onLoad="'.&Apache::lonmenu::loadevents().'" '.
       'onUnload="'.&Apache::lonmenu::unloadevents().'" ';
    my $background=&Apache::lonxml::get_param('background',$parstack,
     $safeeval);
    if ($background) {
       $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
    $background;
       $body_tag_start.='background="'.$background.'" ';
    } else {
       my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
      $safeeval);
       if ($bgcolor) {
    $body_tag_start.='bgcolor="'.$bgcolor.'" ';
       } else {
    $body_tag_start.='bgcolor="#ffffff"';
       }
    }
    $body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
    if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
       my ($symb,undef,undef,undef,$publicuser)=
    &Apache::lonxml::whichuser();
       if ($symb eq '' && !$publicuser) {
    my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
    $help="Browsing resource, all submissions are temporary.<br />";
    $body_tag_start.=$help;
       }
    }
       }
       my $form_tag_start;
       if (!defined($found{'form'})) {
    $form_tag_start='<form name="lonhomework" method="POST" action="'.
       $ENV{'request.uri'}.'">';
       }
       return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
   }
   
   #use Time::HiRes();
   sub get_resource_name {
       my ($parstack,$safeeval)=@_;
       my $name=&Apache::lonnet::gettitle();
       if ($name eq '') {
    $name=&Apache::lonnet::EXT('resource.title');
    if ($name eq 'con_lost') { $name = ''; }
       }
       $Apache::lonhomework::name=$name;
       return $name;
   }
   
   sub setup_rndseed {
       my ($safeeval)=@_;
       my $rndseed;
       my ($symb)=&Apache::lonxml::whichuser();
       if ($ENV{'request.state'} eq "construct" || $symb eq '') {
    $rndseed=$ENV{'form.rndseed'};
    if (!$rndseed) {
       $rndseed=$Apache::lonhomework::history{'rndseed'};
       if (!$rndseed) {
    $rndseed=time;
    $ENV{'form.rndseed'}=$rndseed;
       }
    }
    if ($ENV{'form.resetdata'} eq 'New Problem Variation' ||
       $ENV{'form.newrandomization'} eq 'New Randomization') {
       $rndseed=time;
       if ($rndseed eq $ENV{'form.rndseed'}) {
    srand($rndseed);
    $rndseed=int(rand(1000000000));
       }
       $ENV{'form.rndseed'}=$rndseed;
       delete($ENV{'form.resetdata'});
       delete($ENV{'form.newrandomization'});
    }
    &Apache::lonxml::debug("Setting rndseed to $rndseed");
    &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
       }
       return $rndseed;
   }
   
   sub problem_edit_header {
       return '<input type="hidden" name="submitted" value="edit" />
          <input type="hidden" name="problemmode" value="Edit" />
          <input type="submit" name="problemmode" value="Discard Edits and View" />
          <input type="submit" name="problemmode" value="EditXML" />
          <input type="submit" name="Undo" value="undo" /> <hr />
          <input type="submit" name="submit" value="Submit Changes and Edit" />
          <input type="submit" name="submit" value="Submit Changes and View" /><br /><p>&nbsp;</p><table border="0"><tr><td bgcolor="#DDDDDD">
         ';
   }
   
   sub problem_edit_footer {
       return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
       <input type="submit" name="submit" value="Submit Changes and View" />';
   }
   
   sub problem_web_to_edit_header {
       my ($rndseed)=@_;
       my $result.='<input type="hidden" name="problemmode" value="View" />
                <input type="submit" name="problemmode" value="Edit" />
                <input type="submit" name="problemmode" value="EditXML" />
                <input type="submit" name="newrandomization" value="New Randomization" />
                <input type="submit" name="resetdata" value="Reset Submissions" />
                <nobr><input type="submit" name="changerandseed" value="Change Random Seed To:" />
                 <input type="text" name="rndseed" width="10" value="'.
          $rndseed.'"
              onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
                <input type="checkbox" name="showallfoils" ';
       if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
       $result.= ' />&nbsp;Show&nbsp;All&nbsp;Foils
                <hr />';
       my $numtoanalyze=$ENV{'form.numtoanalyze'};
       if (!$numtoanalyze) { $numtoanalyze=20; }
       $result.= '<input type="submit" name="problemmode" value="Calculate answers" /> for
                <input type="text" name="numtoanalyze" value="'.
    $numtoanalyze.'" size="5" /> versions of this problem.'.
        &Apache::loncommon::help_open_topic("Analyze_Problem",
        '',undef,undef,300).
        '<hr />';
       return $result;
   }
   
   sub initialize_storage {
       %Apache::lonhomework::results=();
       %Apache::lonhomework::history=();
       my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
       if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
    %Apache::lonhomework::history=
       &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
    my ($temp)=keys %Apache::lonhomework::history ;
    &Apache::lonxml::debug("Return message of $temp");
       } else {
    %Apache::lonhomework::history=
       &Apache::lonnet::restore($symb,$courseid,$domain,$name);
       }
       #ignore error conditions
       my ($temp)=keys %Apache::lonhomework::history ;
       if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
   }
   
   # -------------------------------------------------------------finalize_storage
   # Stores away the result has to a student's environment
   # checks form.grade_ for specific values, other wises stores
   # to the running users environment
   sub finalize_storage {
       my $result;
       my ($temp) = keys %Apache::lonhomework::results;
       if ( $temp ne '' ) {
    my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
    if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
       $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
       $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
    $ENV{'request.uri'},'',$domain,$name);
       &Apache::lonxml::debug('Construct Store return message:'.$result);
    } else {
       $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
       $symb,$courseid,$domain,$name);
       &Apache::lonxml::debug('Store return message:'.$result);
    }
       }
       return $result;
   }
   
   sub checkout_msg {
       return (<<ENDCHECKOUT);
   <h2>The resource needs to be checked out</h2>
   As a resource gets checked out, a unique timestamped ID is given to it, and a
   permanent record is left in the system.<p />
   <font color=red>
   Checking out resources is subject to course policies, and may exclude future
   credit even if done erroneously.<p />
   </font>
   <form name="checkout" method="POST" action="$ENV{'request.uri'}">
   <input type="hidden" name="doescheckout" value="yes" />
   <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
   </form>
   ENDCHECKOUT
 }  }
   
 sub start_problem {  sub start_problem {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   unless ($target eq 'meta') {  
     my $args ='';      if ( $Apache::inputtags::part ne '' ||
     if ( $#$parstack > -1 ) {   $Apache::lonhomework::parsing_a_problem) {
       $args=$$parstack[$#$parstack];   &Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
    #my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
    return '';
     }      }
     my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);  
       $Apache::lonhomework::parsing_a_problem=1;
   #initialize globals
     $Apache::inputtags::part='0';      $Apache::inputtags::part='0';
       @Apache::inputtags::partlist=('0');
       @Apache::inputtags::responselist = ();
       @Apache::inputtags::importlist = ();
       @Apache::inputtags::previous=();
       @Apache::inputtags::previous_version=();
       $Apache::structuretags::printanswer='No';
       @Apache::structuretags::whileconds=();
       @Apache::structuretags::whilebody=();
       @Apache::structuretags::whileline=();
       $Apache::lonhomework::scantronmode=0;
       $Apache::lonhomework::problemstatus=
    &Apache::lonnet::EXT('resource.0.problemstatus');
   
       if (defined($ENV{'scantron.maxquest'})) {
    $Apache::lonhomework::scantronmode=1;
       }
   
       if ($target ne 'analyze') {
    &initialize_storage();
    if ($target eq 'web') {
       &Apache::lonhomework::showhash(%Apache::lonhomework::history);
    }
    $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
    &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
       }
       if ($Apache::lonhomework::type eq '' ) {
    my $uri=$ENV{'request.uri'};
    if ($uri=~/\.(\w+)$/) {
       $Apache::lonhomework::type=$1;
       &Apache::lonxml::debug("Using type of $1");
    } else {
       $Apache::lonhomework::type='problem';
       &Apache::lonxml::debug("Using default type, problem, :$uri:");
    }
       }
   
       #added vars to the scripting enviroment
     my $expression='$external::part='.$Apache::inputtags::part.';';      my $expression='$external::part='.$Apache::inputtags::part.';';
     $safeeval->share_from('Apache::inputtags',['@part']);  
     &Apache::run::run($expression,$safeeval);      &Apache::run::run($expression,$safeeval);
     return "<title>$name</title>\n<body bgcolor=#FFFFFF>\n<form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">";      my $status;
   }       my $accessmsg;
   
       #should get back a <html> or the neccesary stuff to start XML/MathML
       my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
       if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
   
       if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
       if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
    $target eq 'tex') {
    #handle exam checkout
    if ($Apache::lonhomework::type eq 'exam') {
       my $token=
    $Apache::lonhomework::history{"resource.0.outtoken"};
       if (($ENV{'form.doescheckout'}) && (!$token)) {
    $token=&Apache::lonxml::maketoken();
    $Apache::lonhomework::history{"resource.0.outtoken"}=
       $token;
       }
       $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
    }
   
    #handle rand seed in construction space
    my $rndseed=&setup_rndseed($safeeval);
    my ($symb)=&Apache::lonxml::whichuser();
    if ($ENV{'request.state'} ne "construct" && $symb eq '') {
       $form_tag_start.='<input type="hidden" name="rndseed" value="'.
    $rndseed.'" />'.
       '<input type="submit" name="resetdata"
                                value="New Problem Variation" />'.
       '<input type="hidden" name="username"
                                value="'.$ENV{'form.username'}.'" /> <br />';
    }
    ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
    push (@Apache::inputtags::status,$status);
    my $expression='$external::datestatus="'.$status.'";';
    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
    &Apache::run::run($expression,$safeeval);
    &Apache::lonxml::debug("Got $status");
    if (( $status eq 'CLOSED' ) ||
       ( $status eq 'UNCHECKEDOUT') ||
       ( $status eq 'BANNED') ||
       ( $status eq 'UNAVAILABLE')) {
       my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
       if ( $target eq "web" ) {
    $result.= $head_tag_start.'</head>';
    my $msg=$body_tag_start;
    if ($status eq 'UNAVAILABLE') {
       $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
    } else {
       $result.='<h1>Not open to be viewed</h1>';
    }
    if ($status eq 'CLOSED') {
       $msg.='The problem '.$accessmsg;
    } elsif ($status eq 'UNCHECKEDOUT') {
       $msg.=&checkout_msg;
    }
    $result.=$msg.'<br />';
       } elsif ($target eq 'tex') {
    $result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
    if ($status eq 'UNAVAILABLE') {
       $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
    } else {
       $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
    }
       }
    } elsif ($target eq 'web') {
       my $name= &get_resource_name($parstack,$safeeval);
       if ($status eq 'CAN_ANSWER') {
    # create a page header and exit
    $result.="$head_tag_start<title>$name</title></head>
                 $body_tag_start \n $form_tag_start".
     '<input type="hidden" name="submitted" value="yes" />';
    if ($ENV{'request.state'} eq "construct") {
       $result.= &problem_web_to_edit_header($rndseed);
    }
    # if we are viewing someone else preserve that info
    if (defined $ENV{'form.grade_symb'}) {
       foreach my $field ('symb','courseid','domain','username') {
    $result .= '<input type="hidden" name="grade_'.$field.
       '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
       }
    }
       } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
        || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
    $result.=$head_tag_start.
       "<title>$name</title></head>\n$body_tag_start\n";
       }
    } elsif ($target eq 'tex') {
       my $startminipage = '';
       if ($ENV{'form.problem_split'} ne 'yes') {
    $startminipage = '\begin{minipage}{\textwidth}';
       }
       my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
       if ($name eq '') {
    $name=&Apache::lonnet::EXT('resource.title');
    if ($name eq 'con_lost') { $name = ''; }
       }
       $Apache::lonhomework::name=$name;
       my $id = $Apache::inputtags::part;
       my $weight = &Apache::lonnet::EXT("resource.$id.weight");
       my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
       my @allkeys = split /,/,$allkeys;
       my $allow_print_points = 0;
       foreach my $partial_key (@allkeys) {
    if ($partial_key=~m/weight/) {
       $allow_print_points++;
    }
       }
       my $duedate = &Apache::lonnet::EXT("resource.$id.duedate"); 
       $duedate = POSIX::strftime("%c",localtime($duedate));
       my $temp_file;
       my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
       if (-e $filename) {
    $temp_file = Apache::File->new($filename);
       } else {
    $temp_file = Apache::File->new('>>'.$filename);
       }
       my @due_file_content = <$temp_file>;
       my $due_file_content = $due_file_content[$#due_file_content];
       chomp $due_file_content;
       my $name_of_resourse= &get_resource_name($parstack,$safeeval);
       if ($due_file_content ne $duedate) {
    $temp_file = Apache::File->new('>'.$filename);
    print $temp_file "$duedate\n";
    if (not $ENV{'request.symb'} =~ m/\.page_/) {
       if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
    $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent '.$startminipage;
       } else {
    $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent'.$startminipage;
    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
       }
    } else {
       $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
    }
       } else {
    if (not $ENV{'request.symb'} =~ m/\.page_/) {
       $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent'.$startminipage;
       if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
    } else {
       $result .= '\vskip 1mm \\\\\\\\';
    }
       }
    }
       } elsif ($target eq 'edit') {
    $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
       &problem_edit_header();
    my $temp=&Apache::edit::insertlist($target,$token);
    $result.=$temp;
       } elsif ($target eq 'modified') {
    $result=$token->[4];
    $result.=&Apache::edit::handle_insert();
       } else {
    # page_start returned a starting result, delete it if we don't need it
    $result = '';
       }
       return $result;
 }  }
   
 sub end_problem {  sub end_problem {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $result='';      my $result='';
   unless ($target eq 'meta') {      my $status=$Apache::inputtags::status['-1'];
     $result="</form></body>\n";      if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
   } else {   $target eq 'tex') {
     if ($Apache::inputtags::part ne '0') {   if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
       $result=&Apache::response::mandatory_part_meta;       $status eq 'CAN_ANSWER' ) {
       # if part is zero, no <part>s existed, so we need to the grading
       &Apache::inputtags::grade;
    } elsif ( ($target eq 'web' || $target eq 'tex') &&
     $Apache::inputtags::part eq '0' &&
     $status ne 'UNCHECKEDOUT') {
       # if part is zero, no <part>s existed, so we need show the current
       # grading status
       my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
       $result.= $gradestatus;
    }
    if (
       (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
       ($target eq 'answer') || ($target eq 'tex')
      ) {
       if ($status eq 'CAN_ANSWER') {
    if ($target ne 'tex' &&
       $ENV{'form.answer_output_mode'} ne 'tex') {
       $result.="</form></body>\n";
    }
       } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
        $status eq 'UNCHECKEDOUT' ) {
    if ($target ne 'tex') {
       $result.="</body>\n";
    }
       }
       if ($target eq 'web') {
    $result.=&Apache::lonxml::xmlend();
       } elsif ($target eq 'tex') {
    my $endminipage = '';
    if ($ENV{'form.problem_split'} ne 'yes') {
       $endminipage = '\end{minipage}';
    }
    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
    if (not $ENV{'request.symb'} =~ m/\.page_/) {
       $result .= $endminipage.'\end{document} ';
    } else {
       $result .= '';
    }
       }
    }
    if ($target eq 'grade') {
       &Apache::lonhomework::showhash(%Apache::lonhomework::results);
       &finalize_storage();
    }
    if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
       && $ENV{'form.answer_output_mode'} ne 'tex') {
       $result.='</html>'; # normally we get it from xmlend, but in CSTR
                           # we always show answer mode too.
    }
       } elsif ($target eq 'meta') {
    if ($Apache::inputtags::part eq '0') {
       @Apache::inputtags::response=();
       $result=&Apache::response::mandatory_part_meta;
    }
       } elsif ($target eq 'edit') {
    &Apache::lonxml::debug("in end_problem with $target, edit");
    $result = &problem_edit_footer();
       }
   
       if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
    &Apache::inputtags::check_for_duplicate_ids();
     }      }
   }      undef(%Apache::lonhomework::history);
   return $result;      undef(%Apache::lonhomework::results);
       undef($Apache::inputtags::part);
       undef($Apache::lonhomework::parsing_a_problem);
   
       return $result;
   }
   
   
   sub start_library {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
   
       if ($target eq 'edit') {
    ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
       &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
    $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
       &problem_edit_header();
    my $temp=&Apache::edit::insertlist($target,$token);
    $result.=$temp;
       } elsif ($target eq 'modified') {
    $result=$token->[4];
    $result.=&Apache::edit::handle_insert();
       } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
        $ENV{'request.state'} eq "construct" ) {
    ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
       &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
    my $name=&get_resource_name($parstack,$safeeval);
    my $rndseed=&setup_rndseed($safeeval);
    $result.="$head_tag_start<title>$name</title></head>
                 $body_tag_start \n $form_tag_start".
     '<input type="hidden" name="submitted" value="yes" />';
    $result.=&problem_web_to_edit_header($rndseed);
       }
       return $result;
   }
   
   sub end_library {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result='';
       if ($target eq 'edit') {
    $result=&problem_edit_footer();
       } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
        $ENV{'request.state'} eq "construct") {
    $result.='</form></body>'.&Apache::lonxml::xmlend();
       }
       return $result;
 }  }
   
 sub start_block {  sub start_block {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   
       my $result;
   
   my $code = @$parstack[$#$parstack];      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
   $code =~ s/\"//g;   $target eq 'tex' || $target eq 'analyze') {
   $code .=';return $condition;';   my $code = $token->[2]->{'condition'};
 #  print "<br>$code<br>";   if ($code) {
   my $result = &Apache::run::run($code,$safeeval);      if (!$Apache::lonxml::default_homework_loaded) {
   if ( ! $result ) {    &Apache::lonxml::default_homework_load($safeeval);
 #    my $skip=$$parser[$#$parser]->get_text("/block");      }
     my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);      $result = &Apache::run::run($code,$safeeval);
 #    print "skipped $skip";      &Apache::lonxml::debug("block :$code: returned :$result:");
   }   } else {
   return "";      $result='1';
    }
    if ( ! $result ) {
       my $skip=&Apache::lonxml::get_all_text("/block",$parser);
       &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
    }
    $result='';
       } elsif ($target eq 'edit') {
    $result .=&Apache::edit::tag_start($target,$token);
    $result .=&Apache::edit::text_arg('Test Condition:','condition',
     $token,40);
    $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'condition');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
       }
       return $result;
 }  }
   
 sub end_block {  sub end_block {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       if ($target eq "edit") {
    $result.= &Apache::edit::tag_end($target,$token,'');
       }
       return $result;
   }
   
   sub start_languageblock {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   
       my $result;
   
       if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
    $target eq 'tex' || $target eq 'analyze') {
    &Apache::lonxml::startredirection();
       } elsif ($target eq 'edit') {
    $result .=&Apache::edit::tag_start($target,$token);
    $result .=&Apache::edit::text_arg('Include Language:','include',
     $token,40);
    $result .=&Apache::edit::text_arg('Exclude Language:','exclude',
     $token,40);
    $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'include',
        'exclude');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
       }
       return $result;
   }
   
   sub end_languageblock {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
   
       if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
    $target eq 'tex' || $target eq 'analyze') {
    my $text=&Apache::lonxml::endredirection();
    my $include= &Apache::lonxml::get_param('include',$parstack,$safeeval);
    my $exclude= &Apache::lonxml::get_param('exclude',$parstack,$safeeval);
    my %languages=&Apache::loncommon::display_languages();
    $result='1';
    if ($include) {
       $result='';
       foreach (split(/\,/,$include)) {
    if ($languages{$_}) { $result='1'; }
       }
    }
    if ($exclude) {
       foreach (split(/\,/,$exclude)) {
    if ($languages{$_}) { $result='0'; }
       }
    }
    if ( ! $result ) {
       $result='';
    } else {
       $result=$text;
    }
       } elsif ($target eq "edit") {
    $result.= &Apache::edit::tag_end($target,$token,'');
       }
       return $result;
   }
   
   sub start_instructorcomment {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   
       my $result;
   
       if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
    $target eq 'tex' || $target eq 'analyze') {
           $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
    if ( ! $result ) {
       my $skip=&Apache::lonxml::get_all_text("/instructorcomment",$parser);
       &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
    }
    $result='';
       } elsif ($target eq 'edit') {
    $result .=&Apache::edit::tag_start($target,$token);
    $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
       }
       return $result;
   }
   
   sub end_instructorcomment {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       if ($target eq "edit") {
    $result.= &Apache::edit::tag_end($target,$token,'');
       }
       return $result;
 }  }
   
 sub start_while {  sub start_while {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   
   my $code = @$parstack[$#$parstack];      my $result;
   $code =~ s/\"//g;      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
   $code .=';return $condition;';   $target eq 'tex' || $target eq 'analyze') {
    my $code = $token->[2]->{'condition'};
   push( @Apache::structuretags::whileconds, $code);   
   my $result = &Apache::run::run($code,$safeeval);   push( @Apache::structuretags::whileconds, $code);
   my $bodytext=$$parser[$#$parser]->get_text("/while");   if (!$Apache::lonxml::default_homework_loaded) {
   push( @Apache::structuretags::whilebody, $bodytext);      &Apache::lonxml::default_homework_load($safeeval);
   if ( $result ) {    }
     &Apache::lonxml::newparser($parser,\$bodytext);   my $result = &Apache::run::run($code,$safeeval);
   }   my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
   return "";   push( @Apache::structuretags::whilebody, $bodytext);
    push( @Apache::structuretags::whileline, $token->[5]);
    &Apache::lonxml::debug("s code $code got -$result-");
    if ( $result ) {
       &Apache::lonxml::newparser($parser,\$bodytext);
    }
       } elsif ($target eq 'edit') {
    $result .=&Apache::edit::tag_start($target,$token);
    $result .=&Apache::edit::text_arg('Test Condition:','condition',
     $token,40);
    $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'condition');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
       }
       return $result;
 }  }
   
 sub end_while {  sub end_while {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $code = pop @Apache::structuretags::whileconds;      my $result;
   my $bodytext = pop @Apache::structuretags::whilebody;  
   my $result = &Apache::run::run($code,$safeeval);      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
   if ( $result ) {    $target eq 'tex' || $target eq 'analyze') {
     &Apache::lonxml::newparser($parser,\$bodytext);   my $code = pop(@Apache::structuretags::whileconds);
   }    my $bodytext = pop(@Apache::structuretags::whilebody);
   return "";   my $line = pop(@Apache::structuretags::whileline);
    my $return = &Apache::run::run($code,$safeeval);
    my $starttime=time;
    my $error=0;
    while ($return) {
       if (time-$starttime >
    $Apache::lonnet::perlvar{'lonScriptTimeout'}) {
    $return = 0; $error=1; next;
       }
       $result.=&Apache::scripttag::xmlparse($bodytext);
       $return = &Apache::run::run($code,$safeeval);
    }
    if ($error) {
       &Apache::lonxml::error('<pre>Code ran too long. It ran for more than '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' seconds occured while running &lt;while$gt; on line '.$line.'</pre>');
    }
       } elsif ($target eq "edit") {
    $result.= &Apache::edit::tag_end($target,$token,'');
       }
       return $result;
 }  }
   
 # <randomlist>   # <randomlist show="1">
 #  <tag1>..</tag1>  #  <tag1>..</tag1>
 #  <tag2>..</tag2>  #  <tag2>..</tag2>
 #  <tag3>..</tag3>  #  <tag3>..</tag3>
 #  ...   #  ...
 # </randomlist>  # </randomlist>
 sub start_randomlist {  sub start_randomlist {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);      my $result;
   my $b_parser= HTML::TokeParser->new(\$body);      if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
   my $b_tok;   $target eq 'tex' || $target eq 'analyze') {
   my @randomlist;   my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
   my $list_item;   my $b_parser= HTML::TokeParser->new(\$body);
    my $b_tok;
   while($b_tok = $b_parser->get_token() ) {   my @randomlist;
     if($b_tok->[0] eq 'S') { # start tag   my $list_item;
     # get content of the tag until matching end tag   while($b_tok = $b_parser->get_token() ) {
     # get all text upto the matching tag      if($b_tok->[0] eq 'S') { # start tag
     # and push the content into @randomlist   # get content of the tag until matching end tag
       $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);   # get all text upto the matching tag
       $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";   # and push the content into @randomlist
       push(@randomlist,$list_item);   $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
    #  print "<BR><B>START-TAG $b_tok->[1], $b_tok->[4], $list_item</B>";     $b_parser);
     }   $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
     if($b_tok->[0] eq 'T') { # text   push(@randomlist,$list_item);
     # what to do with text in between tags?   #  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
       #  print "<B>TEXT $b_tok->[1]</B><BR>";                  #         $list_item</b>";
     }      }
     # if($b_tok->[0] eq 'E') { # end tag, should not happen      if($b_tok->[0] eq 'T') { # text
       #  print "<B>END-TAG $b_tok->[1]</B><BR>";   # what to do with text in between tags?
     # }   #  print "<b>TEXT $b_tok->[1]</b><br />";
   }      }
   my @idx_arr = (0 .. $#randomlist);      # if($b_tok->[0] eq 'E') { # end tag, should not happen
   &Apache::structuretags::shuffle(\@idx_arr);      #  print "<b>END-TAG $b_tok->[1]</b><br />";
   my $bodytext = '';      # }
   for(0 .. $#randomlist) {   }
     $bodytext .= "$randomlist[ $idx_arr[$_] ]";   my @idx_arr = (0 .. $#randomlist);
   }   &Apache::structuretags::shuffle(\@idx_arr);
    my $bodytext = '';
   &Apache::lonxml::newparser($parser,\$bodytext);   my $show=$#randomlist;
   return "";   my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
    $showarg--;
    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
    for(0 .. $show) {
       $bodytext .= "$randomlist[ $idx_arr[$_] ]";
    }
    &Apache::lonxml::newparser($parser,\$bodytext);
       } elsif ($target eq 'edit' ) {
    $result .=&Apache::edit::tag_start($target,$token);
    $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
      $token,5);
    $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified' ) {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'show');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
       }
       return $result;
 }  }
   
 sub shuffle {  sub shuffle {
     my $a=shift;      my $a=shift;
     my $i;      my $i;
     for($i=@$a;--$i;) {      if (defined(@$a)) {
       my $j=int rand($i+1);   &Apache::response::setrandomnumber();
       next if $i == $j;   for($i=@$a;--$i;) {
       @$a[$i,$j] = @$a[$j,$i];      my $j=int(&Math::Random::random_uniform() * ($i+1));
       next if $i == $j;
       @$a[$i,$j] = @$a[$j,$i];
    }
     }      }
 }  }
   
 sub end_randomlist {  sub end_randomlist {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result;
       if ($target eq 'edit' ) {
    $result=&Apache::edit::tag_end($target,$token,
          'End Randomly Parsed Block');
       }
       return $result;
 }  }
   
 sub start_part {  sub start_part {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $args ='';      my $result='';
   if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }      my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
   my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);      if ($id eq '') { $id = $Apache::lonxml::curdepth; }
   $Apache::inputtags::part=$id;      $Apache::inputtags::part=$id;
   if ($target eq 'meta') {      push(@Apache::inputtags::partlist,$id);
     return &Apache::response::mandatory_part_meta;      @Apache::inputtags::response=();
   }      @Apache::inputtags::previous=();
       @Apache::inputtags::previous_version=();
       $Apache::lonhomework::problemstatus=
    &Apache::lonnet::EXT("resource.$id.problemstatus");
       my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
   
       if ($target eq 'meta') {
    return &Apache::response::mandatory_part_meta;
       } elsif ($target eq 'web' || $target eq 'grade' ||
        $target eq 'answer' || $target eq 'tex') {
    if ($hidden) {
       my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
    } else {
       my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
       push (@Apache::inputtags::status,$status);
       my $expression='$external::datestatus="'.$status.'";';
       $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
       &Apache::run::run($expression,$safeeval);
       if ( $status eq 'CLOSED' ) {
    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
    if ( $target eq "web" ) {
       $result="<br />Part is not open to be viewed. It $accessmsg<br />";
    } elsif ( $target eq 'tex' ) {
       $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
    }
       } else {
    if ($target eq 'tex') {
       $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
       my $weight = &Apache::lonnet::EXT("resource.$id.weight");
       if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
    }
       }
    }
       } elsif ($target eq 'edit') {
    $result.=&Apache::edit::tag_start($target,$token);
    $result.=&Apache::edit::text_arg('Part ID:','id',$token).
       &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
    &Apache::edit::end_row().&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'id');
    if ($constructtag) {
       $result = &Apache::edit::rebuild_tag($token);
       $result.=&Apache::edit::handle_insert();
    }
       }
       return $result;
 }  }
   
 sub end_part {  sub end_part {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       &Apache::lonxml::debug("in end_part $target ");
       my $status=$Apache::inputtags::status['-1'];
       my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
       my $result='';
       if ( $target eq 'meta' ) {
    $result='';
       } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
    $result=&Apache::inputtags::grade;
       } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
    my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
    $target);
    if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
    $result=$gradestatus;
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::end_table();
       }
       pop @Apache::inputtags::status;
       $Apache::inputtags::part='';
       return $result;
   }
   
   sub start_preduedate {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
    if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
       $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
       $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
       &Apache::lonxml::get_all_text("/preduedate",$parser);
    }
       }
       return '';
   }
   
   sub end_preduedate {
       return '';
   }
   
   sub start_postanswerdate {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
    if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
       &Apache::lonxml::get_all_text("/postanswerdate",$parser);
    }
       } elsif ($target eq 'tex') {
    return '\vskip 0 mm \noindent';
       }
       return '';
   }
   
   sub end_postanswerdate {
       return '';
   }
   
   sub start_notsolved {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
    $target eq 'tex') {
    my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
    &Apache::lonxml::debug("not solved has :$gradestatus:");
    if ($gradestatus =~ /^correct/) {
       &Apache::lonxml::debug("skipping");
       &Apache::lonxml::get_all_text("/notsolved",$parser);
    }
       }
       return '';
   }
   
   sub end_notsolved {
       return '';
   }
   
   sub start_solved {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
    $target eq 'tex') {
    my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
    if ($gradestatus !~ /^correct/) {
       &Apache::lonxml::get_all_text("/solved",$parser);
    }
       }
       return '';
   }
   
   sub end_solved {
       return '';
   }
   
   sub start_startouttext {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my @result=(''.'');
       if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
       return (@result);
   }
   
   sub end_startouttext {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result='';
       my $text='';
   
       if ($target eq 'edit') {
    $text=&Apache::lonxml::get_all_text("endouttext",$parser);
    $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
   <td>Delete:".
                    &Apache::edit::deletelist($target,$token)
    ."</td>
   <td>".
                    &Apache::edit::insertlist($target,$token).
    &Apache::edit::end_row().
                    &Apache::edit::start_spanning_row()."\n"
    .'<table><tr><td>'.
    &Apache::loncommon::help_open_topic("Greek_Symbols",
        'Greek Symbols',
        undef,undef,600)
    .'</td><td>'.
    &Apache::loncommon::help_open_topic("Other_Symbols",
        'Other Symbols',
        undef,undef,600)
    .'</td></tr></table>'.
    &Apache::edit::editfield($token->[1],$text,"",80,4);
       }
       if ($target eq 'modified') {
    $text=&Apache::lonxml::get_all_text("endouttext",$parser);
    $result='<startouttext />'.&Apache::edit::modifiedfield();
       }
       if ($target eq 'tex') {
    $result .= '\noindent ';
       }
       return $result;
   }
   
   sub start_endouttext {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result='';
       if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
       if ($target eq "modified") {
    $result='<endouttext />'.
       &Apache::edit::handle_insertafter('startouttext'); }
       return $result;
   }
   
   sub end_endouttext {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my @result=('','');
       if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
       return (@result);
   }
   
   sub delete_startouttext {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
       my $text=$$parser['-1']->get_text("/endouttext");
       my $ntoken=$$parser['-1']->get_token();
       &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
       &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
       # Deleting 2 parallel tag pairs, but we need the numbers later to look like
       # they did the last time round
       &Apache::lonxml::increasedepth($ntoken);
       &Apache::lonxml::decreasedepth($ntoken);
       return 1;
 }  }
   
 1;  1;
Removed from v.1.17  
changed lines
  Added in v.1.186

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