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Diff for /loncom/homework/structuretags.pm between versions 1.71 and 1.252

version 1.71, 2001/10/30 19:18:15 version 1.252, 2004/05/27 22:25:16
Line 1 Line 1
 # The LearningOnline Network with CAPA   # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document  # 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  # 2/19 Guy
 # 6/26/2001 fixed extra web display at end of <web></web> tags  # 6/26/2001 fixed extra web display at end of <web></web> tags
 # 8/17,8/18,8/20 Gerd Kortemeyer  # 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;
   use Apache::lonlocal;
   use Apache::lonxml;
   
 sub BEGIN {  BEGIN {
   &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));      &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startouttext','endouttext','simpleeditbutton','definetag'));
 #  &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))  
 }  }
   
 sub start_web {  sub start_web {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);      my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
   if ($target eq 'web') {      if ($target eq 'web') {
     return $bodytext;   return $bodytext;
   }       }
   return '';      return '';
 }  }
   
 sub end_web {  sub end_web {
Line 28  sub end_web { Line 57  sub end_web {
 }  }
   
 sub start_tex {  sub start_tex {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);      my $result='';
   if ($target eq 'tex') {      my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
     return $bodytext      if ($target eq 'tex') {
   }   return $bodytext.' ';
   return '';      }
       return $result;;
 }  }
   
 sub end_tex {  sub end_tex {
Line 41  sub end_tex { Line 71  sub end_tex {
 }  }
   
 sub page_start {  sub page_start {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack,$parser,$safeeval);      my %found;
   my $head_tag_start='<head>'.&Apache::lonxml::registerurl();      foreach my $taginside (@$tagstack) {
   my $body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '.   foreach my $taglookedfor ('html','body','form') {
   'onUnload="'.&Apache::lonxml::unloadevents().'" ';      if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
   my $background=&Apache::lonxml::get_param('background',$parstack,$safeeval);   }
   if ($background) {      }
     $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=  
                                         $background;      my $result;
     $body_tag_start.='background="'.$background.'" ';      my $head_tag_start;
   } else {      if (!defined($found{'html'})) {
     my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval);   $result=&Apache::londefdef::start_html($target,$token,$tagstack,
     if ($bgcolor) {         $parstack,$parser,$safeeval);
       $body_tag_start.='bgcolor="'.$bgcolor.'" ';   $head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target);
     } else {      }
       $body_tag_start.='bgcolor="#ffffff"';      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,
     $safeeval);
    if ($ENV{'browser.imagesuppress'} eq 'on') { $background=''; }
    if ($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) && ($ENV{'browser.blackwhite'} ne 'on')) {
    $body_tag_start.='bgcolor="'.$bgcolor.'" ';
       } else {
    $body_tag_start.='bgcolor="#ffffff"';
       }
    }
    if ($ENV{'browser.fontenhance'} eq 'on') {
       $body_tag_start.=' style="font-size: x-large;" ';
    }
    $body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$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=&mt("Browsing resource, all submissions are temporary.")."<br />";
    $body_tag_start.=$help;
       }
    }
    $body_tag_start.=&Apache::lonxml::message_location();
       }
       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);
   $body_tag_start.='>';  }
   return ($result,$head_tag_start,$body_tag_start);  
   #use Time::HiRes();
   sub get_resource_name {
       my ($parstack,$safeeval)=@_;
       if (defined($Apache::lonhomework::name)) {
    return $Apache::lonhomework::name;
       }
       my $name=&Apache::lonnet::gettitle();
       if ($name eq '') {
    $name=&Apache::lonnet::EXT('resource.title');
    if ($name eq 'con_lost') { $name = ''; }
       }
       if ($name!~/\S+/) {
    $name=$ENV{'request.uri'};
    $name=~s-.*/([^/]+)$-$1-;
       }
       $Apache::lonhomework::name=$name;
       return $name;
   }
   
   sub setup_rndseed {
       my ($safeeval)=@_;
       my $rndseed;
       my ($symb)=&Apache::lonxml::whichuser();
       if ($ENV{'request.state'} eq "construct" || $symb eq '' ||
             $Apache::lonhomework::history{'resource.CODE'}) {
    $rndseed=$ENV{'form.rndseed'};
    if (!$rndseed) {
       $rndseed=$Apache::lonhomework::history{'rndseed'};
       if (!$rndseed) {
    $rndseed=time;
       }
       $ENV{'form.rndseed'}=$rndseed;
    }
    if ($ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
       $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
       srand(time);
       $rndseed=int(rand(2100000000));
       $ENV{'form.rndseed'}=$rndseed;
       delete($ENV{'form.resetdata'});
       delete($ENV{'form.newrandomization'});
    }
    if (defined($rndseed) && $rndseed ne int($rndseed)) {
      $rndseed=join(',',&Math::Random::random_seed_from_phrase($rndseed));
           }
           if ($Apache::lonhomework::history{'resource.CODE'}) {
      $rndseed=&Apache::lonnet::rndseed();
    }
    if ($safeeval) {
       &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="'.&mt('Edit').'" />
          <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
          <input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
          <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> <hr />
          <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes and Edit').'" />
          <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
          &Apache::loncommon::help_open_topic('Problem_Editor_XML_Index',
      'Problem Editing Help').'</td><td>'.
          &Apache::loncommon::help_open_faq(5).
          &Apache::loncommon::help_open_bug('Authoring').'</td></tr></table>'.
          '<table border="0"><tr><td bgcolor="#DDDDDD">';
   }
   
   sub problem_edit_footer {
       return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
       <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />';
   }
   
   sub option {
       my ($value,$name) = @_;
       my $result ="<option value='".$value."' ";
       if ($ENV{'form.'.$name} eq $value) {
    $result.=" selected='on' ";
       }
       $result.='>';
       return $result;
   }
   
   sub problem_web_to_edit_header {
       my ($rndseed)=@_;
       my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />
                <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
                <input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
                <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
                <nobr><input type="submit" name="changerandseed" value="'.&mt('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.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
    &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
    '<hr />';
       $result.="
   <nobr>
   Problem Status:
   <select name='problemstate'>
     <option name=''></option>
     ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
     ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
     ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
     ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
     ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
   </select>
   </nobr>
   <nobr>
   Problem Type:
   <select name='problemtype'>
     <option name=''></option>
     ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
     ".&option('problem','problemtype').&mt("Homework problem")."</option>
     ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
   </select>
   </nobr>
   <nobr>
   Feedback Mode:
   <select name='problemstatus'>
     <option value=''></option>
     ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
     ".&option('no', 'problemstatus').&mt("Don't Show Feedback")."</option>
   </select>
   </nobr>
   <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
   <hr />";
       my $numtoanalyze=$ENV{'form.numtoanalyze'};
       if (!$numtoanalyze) { $numtoanalyze=20; }
       $result.= '<input type="submit" name="problemmode" value='.
    &mt('"Calculate answers').'" /> for
                <input type="text" name="numtoanalyze" value="'.
        $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
        '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
        '',undef,undef,300).
        '<hr />';
       return $result;
 }  }
   
 sub initialize_storage {  sub initialize_storage {
   %Apache::lonhomework::results=();      %Apache::lonhomework::results=();
   my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();      %Apache::lonhomework::history=();
   if ($ENV{'request.state'} eq 'construct') {      my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
     %Apache::lonhomework::history=      if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
       &Apache::lonnet::restore($ENV{'request.uri'},'nohist_construct',$domain,$name);   %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 ;      my ($temp)=keys %Apache::lonhomework::history ;
     &Apache::lonxml::debug("Return message of $temp");      if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
   } 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  # -------------------------------------------------------------finalize_storage
Line 85  sub initialize_storage { Line 296  sub initialize_storage {
 # checks form.grade_ for specific values, other wises stores  # checks form.grade_ for specific values, other wises stores
 # to the running users environment  # to the running users environment
 sub finalize_storage {  sub finalize_storage {
   my $result;      my $result;
   my ($temp) = keys %Apache::lonhomework::results;      my ($temp) = keys %Apache::lonhomework::results;
   if ( $temp ne '' ) {      if ( $temp ne '' ) {
     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();   my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
     if ($ENV{'request.state'} eq 'construct') {   if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
       $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,      $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
       $ENV{'request.uri'},'nohist_construct',      $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
       $domain,$name);   $ENV{'request.uri'},'',$domain,$name);
       &Apache::lonxml::debug('Construct Store return message:'.$result);      &Apache::lonxml::debug('Construct Store return message:'.$result);
     } else {   } else {
       $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,      $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
       $symb,$courseid,$domain,$name);      $symb,$courseid,$domain,$name);
       &Apache::lonxml::debug('Store return message:'.$result);      &Apache::lonxml::debug('Store return message:'.$result);
    }
     }      }
   }      return $result;
   return $result;  
 }  }
   
 sub checkout_msg {  sub checkout_msg {
 return (<<ENDCHECKOUT);      my %lt=&Apache::lonlocal::texthash( 
 <h2>The resource needs to be checked out</h2>   'resource'=>'The resource needs to be checked out',
 As a resource gets checked out, a unique timestamped ID is given to it, and a   '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.',
 permanent record is left in the system.<p />                  'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
 <font color=red>                  'checkout'=>'Check out Exam for Viewing',
 Checking out resources is subject to course policies, and may exclude future   'checkout?'=>'Check out Exam?');
 credit even if done erroneously.<p />      return (<<ENDCHECKOUT);
 </font>    <h2>$lt{'resource'}</h2>
 <form method=post>      <p>$lt{'id_expln'}</p>
 <input type=button name="doescheckout"   <font color="red">
 value="Check out Exam for Viewing"   <p>$lt{'warning'}</p>
 onClick="if (confirm('Check out Exam?')) { this.form.submit(); }" />  </font>
   <form name="checkout" method="POST" action="$ENV{'request.uri'}">
   <input type="hidden" name="doescheckout" value="yes" />
   <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
 </form>  </form>
 ENDCHECKOUT  ENDCHECKOUT
 }  }
   
 sub start_problem {  sub firstaccess_msg {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($time)=@_;
       return (<<ENDCHECKOUT);
   <h2>This resource is open for a limited time, once you click the 'Show Resource' button below you have $time to complete all resources in this sequence.</h2>
   <form name="markaccess" method="POST" action="$ENV{'request.uri'}">
   <input type="hidden" name="markaccess" value="yes" />
   <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
   </form>
   ENDCHECKOUT
   }
   
   sub init_problem_globals {
       my ($type)=@_;
       #initialize globals
       if ($type eq 'problem') {
    $Apache::inputtags::part='0';
    @Apache::inputtags::partlist=('0');
   
 #intialize globals   $Apache::lonhomework::problemstatus=&get_problem_status('0')
   $Apache::inputtags::part='0';  
   @Apache::inputtags::responselist = ();  
   @Apache::inputtags::previous=();  
   &initialize_storage();  
   $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');  
   &Apache::lonxml::debug("Found this to be of type :$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 {      } else {
       $Apache::lonhomework::type='problem';   $Apache::inputtags::part='';
       &Apache::lonxml::debug("Using default type, problem, :$uri:");   @Apache::inputtags::partlist=();
    $Apache::lonhomework::problemstatus='';
       }
       @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=();
       $Apache::lonhomework::scantronmode=0;
       undef($Apache::lonhomework::name);
   
   }
   
   sub reset_problem_globals {
       my ($type)=@_;
       undef(%Apache::lonhomework::history);
       undef(%Apache::lonhomework::results);
       undef($Apache::inputtags::part);
   #don't undef this, lonhomework.pm takes care of this, we use this to 
   #detect if we try to do 2 problems in one file
   #   undef($Apache::lonhomework::parsing_a_problem);
       undef($Apache::lonhomework::name);
   }
   
   sub set_problem_state {
       my ($part)=@_;
       if ($ENV{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
    $Apache::lonhomework::history{"resource.$part.solved"}=
       'correct_by_student';
     }      }
   }  }
   
   #added vars to the scripting enviroment  sub get_problem_status {
   my $expression='$external::part='.$Apache::inputtags::part.';';      my ($part)=@_;
   &Apache::run::run($expression,$safeeval);      my $problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
   my $status;      &Apache::lonxml::debug("problem status for $part is $problem_status");
   my $accessmsg;      &Apache::lonxml::debug("env probstat is ".$ENV{'form.problemstatus'});
       if ($ENV{'request.state'} eq 'construct' &&
   #should get back a <html> or the neccesary stuff to start XML/MathML   defined($ENV{'form.problemstatus'})) {
   my ($result,$head_tag_start,$body_tag_start)=   $problem_status=$ENV{'form.problemstatus'};
     &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);  
   
   
   if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {  
     #handle exam checkout  
     if ($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);  
     }      }
       return $problem_status;
   }
   
     #handle rand seed in construction space  sub start_problem {
     my $rndseed;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     if ($ENV{'request.state'} eq "construct") {  
       $rndseed=$ENV{'form.rndseed'};      if ( $Apache::inputtags::part ne '' ||
       if (!$rndseed) {   $Apache::lonhomework::parsing_a_problem) {
  $rndseed=time;   &Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
  $ENV{'form.rndseed'}=$rndseed;   #my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
       }   return '';
       &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);      }
     }  
     ($status,$accessmsg) = &Apache::lonhomework::check_access('0');      $Apache::lonhomework::parsing_a_problem=1;
     push (@Apache::inputtags::status,$status);      &init_problem_globals('problem');
     my $expression='$external::datestatus="'.$status.'";';  
     $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';      if (defined($ENV{'scantron.maxquest'})) {
    $Apache::lonhomework::scantronmode=1;
       }
   
       &initialize_storage();
       if ($target ne 'analyze') {
    if ($target eq 'web') {
       &Apache::lonhomework::showhash(%Apache::lonhomework::history);
    }
           if ($ENV{'request.state'} eq 'construct') { &set_problem_state('0'); }
    $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
    if (($ENV{'request.state'} eq 'construct') &&
       defined($ENV{'form.problemtype'})) {
       $Apache::lonhomework::type=$ENV{'form.problemtype'};
    }
    &Apache::lonxml::debug("Found this to be of type :$Apache::ltonhomework::type:");
       }
       if ($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.'\';';
       $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
     &Apache::run::run($expression,$safeeval);      &Apache::run::run($expression,$safeeval);
     if (( $status eq 'CLOSED' ) ||      my $status;
         ( $status eq 'UNCHECKEDOUT') ||      my $accessmsg;
         ( $status eq 'BANNED')) {  
       my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);      #should get back a <html> or the neccesary stuff to start XML/MathML
       if ( $target eq "web" ) {      my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
  $result.= $head_tag_start.'</head>';   &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
         my $msg=$body_tag_start.      if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
     '<h1>Not open to be viewed</h1>';  
         if ($status eq 'CLOSED') {      if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
     $msg.='The problem '.$accessmsg;      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
  } elsif ($status eq 'UNCHECKEDOUT') {   $target eq 'tex') {
             $msg.=&checkout_msg;   #handle exam checkout
         }   if ($Apache::lonhomework::type eq 'exam') {
  $result.=$msg.'<br />';      my $token=
       }   $Apache::lonhomework::history{"resource.0.outtoken"};
     } elsif ($target eq 'web') {      if (($ENV{'form.doescheckout'}) && (!$token)) {
       my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);   $token=&Apache::lonxml::maketoken();
       if ($name eq '') {    $Apache::lonhomework::history{"resource.0.outtoken"}=
  $name=&Apache::lonnet::EXT('resource.title');      $token;
  if ($name eq 'con_lost') { $name = ''; }      }
       }      $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
       $Apache::lonhomework::name=$name;   }
       if ($status eq 'CAN_ANSWER') {   if ($ENV{'form.markaccess'}) {
  # create a page header and exit      &Apache::lonnet::set_first_access('map');
  $result.="$head_tag_start<title>$name</title></head>\n   }
               $body_tag_start\n   #handle rand seed in construction space
               <form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".   my $rndseed=&setup_rndseed($safeeval);
  '<input type="hidden" name="submitted" value="yes" />';   my ($symb)=&Apache::lonxml::whichuser();
  if ($ENV{'request.state'} eq "construct") {   if ($ENV{'request.state'} ne "construct" && $symb eq '') {
   $result.=      $form_tag_start.='<input type="hidden" name="rndseed" value="'.
     '<input type="hidden" name="problemmode" value="View" />   $rndseed.'" />'.
              <input type="submit" name="problemmode" value="Edit" />      '<input type="submit" name="resetdata"
              Random Seed:<input type="text" name="rndseed" width="10" value="'.                               value="'.&mt('New Problem Variation').'" />'.
        $rndseed.'" /><hr />';      '<input type="hidden" name="username"
  }                               value="'.$ENV{'form.username'}.'" /> <br />';
  # if we are viewing someone else preserve that info   }
  if (defined $ENV{'form.grade_symb'}) {   ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
   foreach my $field ('symb','courseid','domain','username') {   push (@Apache::inputtags::status,$status);
     $result .= '<input type="hidden" name="grade_'.$field.   my $expression='$external::datestatus="'.$status.'";';
       '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";   $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
   }   &Apache::run::run($expression,$safeeval);
  }   &Apache::lonxml::debug("Got $status");
       } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'   if (( $status eq 'CLOSED' ) ||
        || $status eq 'CLOSED') {      ( $status eq 'UNCHECKEDOUT') ||
  $result.=$head_tag_start.      ( $status eq 'NOT_YET_VIEWED') ||
   "<title>$name</title></head>\n$body_tag_start\n";      ( $status eq 'BANNED') ||
       }      ( $status eq 'UNAVAILABLE') ||
     }      ( $status eq 'INVALID_ACCESS')) {
   } elsif ($target eq 'edit') {      my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
     $result.=$head_tag_start."</head>".$body_tag_start.      if ( $target eq "web" ) {
       '<form name="lonhomework" method="POST" action="'.   $result.= $head_tag_start.'</head>';
  $ENV{'request.uri'}.'">   my $msg=$body_tag_start;
        <input type="hidden" name="submitted" value="edit" />   if ($status eq 'UNAVAILABLE') {
        <input type="hidden" name="problemmode" value="Edit" />      $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
        <input type="submit" name="problemmode" value="View" />   } else {
        <input type="submit" name="Undo" value="undo" /> <hr />      $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
        <input type="submit" name="submit" value="Submit Changes" /><br />   }
       ';   if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
     my $temp=&Apache::edit::insertlist($target,$token);      $msg.='The problem '.$accessmsg;
     $result.=$temp;   } elsif ($status eq 'UNCHECKEDOUT') {
   } elsif ($target eq 'modified') {      $msg.=&checkout_msg;
     $result=$token->[4];   } elsif ($status eq 'NOT_YET_VIEWED') {
     $result.=&Apache::edit::handle_insert();      $msg.=&firstaccess_msg($accessmsg);
   } else {   }
     # page_start returned a starting result, delete it if we don't need it   $result.=$msg.'<br />';
     $result = '';      } elsif ($target eq 'tex') {
   }   $result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
   return $result;   if ($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')." $accessmsg \\vskip 0 mm ";
    }
       }
    } elsif ($target eq 'web') {
       my $name= &get_resource_name($parstack,$safeeval);
       $result.="$head_tag_start<title>$name</title></head>
                 $body_tag_start \n $form_tag_start".
         '<input type="hidden" name="submitted" value="yes" />';
       # create a page header and exit
       if ($ENV{'request.state'} eq "construct") {
    $result.= &problem_web_to_edit_header($ENV{'form.rndseed'});
       }
       # if 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 ($target eq 'tex') {
       my $startminipage = '';
       if (not $ENV{'form.problem_split'}=~/yes/) {
    $startminipage = '\begin{minipage}{\textwidth}';
       }
       my $id = $Apache::inputtags::part;
       my $weight = &Apache::lonnet::EXT("resource.$id.weight");
       my $packages=&Apache::lonnet::metadata($ENV{'request.uri'},'packages');
       my @packages = split /,/,$packages;
       my $allow_print_points = 0;
       foreach my $partial_key (@packages) {
    if ($partial_key=~m/^part_0$/) {
       $allow_print_points=1;
    }
       }
       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 $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($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 '.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
       } 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.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
    if ($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.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
       if (($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();
    $Apache::lonxml::warnings_error_header=
       &mt("Editor Errors - these errors might not effect the running of the problem, but they will likely cause problems with further use of the Edit mode. Please use the EditXML mode to fix these errors.")."<br />";
    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,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $result='';      my $result='';
   my $status=$Apache::inputtags::status['-1'];      my $status=$Apache::inputtags::status['-1'];
   if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ) {      if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
     if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&   $target eq 'tex') {
        $status eq 'CAN_ANSWER') {   if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
       # if part is zero, no <part>s existed, so we need to the grading      # if part is zero, no <part>s existed, so we need to the grading
       &Apache::inputtags::grade;      if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
     } elsif ( $target eq 'web' && $Apache::inputtags::part eq '0') {   &Apache::inputtags::grade;
       # if part is zero, no <part>s existed, so we need show the current       } else {
       # grading status   # move any submission data to .hidden
       $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);   &Apache::inputtags::hidealldata($Apache::inputtags::part);
     }      }
     if (   } elsif ( ($target eq 'web' || $target eq 'tex') &&
  ($target eq 'web' && ($ENV{'request.state'} ne 'construct')) ||    $Apache::inputtags::part eq '0' &&
  ($target eq 'answer')    $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
        ) {      # if part is zero, no <part>s existed, so we need show the current
       if ($status eq 'CAN_ANSWER') {      # grading status
  $result.="</form></body>\n";       my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
       } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {      $result.= $gradestatus;
  $result.="</body>\n";   }
       }   if (
       $result.=&Apache::lonxml::xmlend();      (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
     }      ($target eq 'answer') || ($target eq 'tex')
     if ($target eq 'grade') {      ) {
       &Apache::lonhomework::showhash(%Apache::lonhomework::results);      if ($target ne 'tex' &&
       &finalize_storage();   $ENV{'form.answer_output_mode'} ne 'tex') {
     }   $result.="</form></body>\n";
   } elsif ($target eq 'meta') {      }
     if ($Apache::inputtags::part eq '0') {      if ($target eq 'web') {
       $result=&Apache::response::mandatory_part_meta;   $result.=&Apache::lonxml::xmlend();
     }      } elsif ($target eq 'tex') {
   } elsif ($target eq 'edit') {   my $endminipage = '';
     &Apache::lonxml::debug("in end_problem with $target, edit");   if (not $ENV{'form.problem_split'}=~/yes/) {
     $result='<br /><input type="submit" name="submit" value="Submit Changes" />';      $endminipage = '\end{minipage}';
   }   }
   return $result;   $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$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;
    }
    $result.=&Apache::response::meta_part_order();
       } elsif ($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();
       }
   
       &reset_problem_globals('problem');
   
       return $result;
 }  }
   
   
 sub start_library {  sub start_library {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my ($result,$head_tag_start,$body_tag_start)=      my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
     &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);      if ($$tagstack[0] eq 'library') {
   if ($target eq 'edit') {   &init_problem_globals('library');
     $result.=$head_tag_start."</head>".$body_tag_start.   $Apache::lonhomework::type='problem';
       '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">      }
        <input type="hidden" name="submitted" value="edit" />      if ($target eq 'edit') {
        <input type="hidden" name="problemmode" value="Edit" />   ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
        <input type="submit" name="problemmode" value="View" />      &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
        <input type="submit" name="Undo" value="undo" /> <hr />   $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
       ';      &problem_edit_header();
     my $temp=&Apache::edit::insertlist($target,$token);   my $temp=&Apache::edit::insertlist($target,$token);
     $result.=$temp;   $result.=$temp;
     return $result;      } elsif ($target eq 'modified') {
   }   $result=$token->[4];
   if ($target eq 'modified') {   $result.=&Apache::edit::handle_insert();
     $result=$token->[4];      } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
     $result.=&Apache::edit::handle_insert();       $ENV{'request.state'} eq "construct" ) {
    ($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;      return $result;
   }  
   return '';  
 }  }
   
 sub end_library {  sub end_library {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $result='';      my $result='';
   if ($target eq 'edit') {      if ($target eq 'edit') {
     $result='<br /><input type="submit" name="submit" value="Submit Changes" />';   $result=&problem_edit_footer();
   }      } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
   return $result;       $ENV{'request.state'} eq "construct") {
    $result.='</form></body>'.&Apache::lonxml::xmlend();
       }
       if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
       return $result;
   }
   
   sub start_definetag {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   
       my $result;
   
       my $name = $token->[2]->{'name'};
       my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
       if ($name=~/^\//) {
    $result=
    '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
       } else {
    $result=
    '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
       }
       $skip=~s/\</\&lt\;/gs;
       $skip=~s/\>/\&gt\;/gs;
       $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
       return $result;
   }
   
   sub end_definetag {
       return '';
 }  }
   
 sub start_block {  sub start_block {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
   if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {      my $result;
     my $code = @$parstack[$#$parstack];  
     $code =~ s/\"//g;      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
     $code .=';return $condition;';   $target eq 'tex' || $target eq 'analyze') {
     #  print "<br />$code<br />";   my $code = $token->[2]->{'condition'};
     my $result = &Apache::run::run($code,$safeeval);   if (defined($code)) {
     &Apache::lonxml::debug("block :$code: returned :$result:");      if (!$Apache::lonxml::default_homework_loaded) {
     if ( ! $result ) {    &Apache::lonxml::default_homework_load($safeeval);
       my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);      }
       &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");      $result = &Apache::run::run($code,$safeeval);
       &Apache::lonxml::debug("block :$code: returned :$result:");
    } else {
       $result='1';
    }
    if ( ! $result ) {
       my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
       &Apache::lonxml::debug("skipping ahead :$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;
   return "";  
 }  }
   
 sub end_block {  sub end_block {
   return '';      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,$style)=@_;
   
       my $result;
   
       if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
    $target eq 'tex' || $target eq 'analyze') {
    my $include = $token->[2]->{'include'};
    my $exclude = $token->[2]->{'exclude'};
           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 ) {
       my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
      $style);
       &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
    }
    $result='';
       } elsif ($target eq 'edit') {
    $result .=&Apache::edit::tag_start($target,$token);
    $result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
     $token,40);
    $result .=&Apache::edit::text_arg(&mt('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 "edit") {
    $result.= &Apache::edit::tag_end($target,$token,'');
       }
       return $result;
   }
   
   sub start_instructorcomment {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
   
       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",
      $parser,$style);
       &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,$tagstack,$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(&mt('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,$tagstack,$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>'.&mt('Code ran too long. It ran for more than').' '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' '.&mt('seconds occured while running &lt;while$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,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   if ($target eq 'answer' || $target eq 'grade' || $target eq 'web') {      my $result;
     my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);      if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
     my $b_parser= HTML::TokeParser->new(\$body);   $target eq 'tex' || $target eq 'analyze') {
     my $b_tok;   my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
     my @randomlist;   my $b_parser= HTML::TokeParser->new(\$body);
     my $list_item;   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 $b_tok->[1]</b><br />";
     }      }
       # if($b_tok->[0] eq 'E') { # end tag, should not happen
     my @idx_arr = (0 .. $#randomlist);      #  print "<b>END-TAG $b_tok->[1]</b><br />";
     &Apache::structuretags::shuffle(\@idx_arr);      # }
     my $bodytext = '';   }
     for(0 .. $#randomlist) {   my @idx_arr = (0 .. $#randomlist);
       $bodytext .= "$randomlist[ $idx_arr[$_] ]";   &Apache::structuretags::shuffle(\@idx_arr);
     }   my $bodytext = '';
     &Apache::lonxml::newparser($parser,\$bodytext);   my $show=$#randomlist;
   }   my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
   return "";   $showarg--;
    if ( ($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 $i;
     if (defined(@$a)) {      if (defined(@$a)) {
       &Apache::response::setrandomnumber();   &Apache::response::pushrandomnumber();
       for($i=@$a;--$i;) {   for($i=@$a;--$i;) {
  my $j=int rand($i+1);      my $j=int(&Math::Random::random_uniform() * ($i+1));
  next if $i == $j;      next if $i == $j;
  @$a[$i,$j] = @$a[$j,$i];      @$a[$i,$j] = @$a[$j,$i];
       }   }
    &Apache::response::poprandomnumber();
     }      }
 }  }
   
 sub end_randomlist {  sub end_randomlist {
   return '';      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,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);      my $result='';
   if ($id eq '') { $id = $Apache::lonxml::curdepth; }      my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
   $Apache::inputtags::part=$id;      if ($id eq '') { $id = $Apache::lonxml::curdepth; }
   @Apache::inputtags::responselist = ();      $Apache::inputtags::part=$id;
   @Apache::inputtags::previous=();      push(@Apache::inputtags::partlist,$id);
   if ($target eq 'meta') {      @Apache::inputtags::response=();
     return &Apache::response::mandatory_part_meta;      @Apache::inputtags::previous=();
   } elsif ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {      @Apache::inputtags::previous_version=();
     my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);      $Apache::lonhomework::problemstatus=&get_problem_status($id);
     push (@Apache::inputtags::status,$status);      my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
     my $expression='$external::datestatus="'.$status.'";';      my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
     $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';  
     &Apache::run::run($expression,$safeeval);      &Apache::run::run($expression,$safeeval);
     if ( $status eq 'CLOSED' ) {  
       my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);      if ($target eq 'meta') {
       if ( $target eq "web" ) {   my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
  return "<br />Part is not open to be viewed. It $accessmsg<br />";   return &Apache::response::mandatory_part_meta.
       }         &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
       } 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 ($ENV{'request.state'} eq 'construct') {
    &set_problem_state($Apache::inputtags::part); 
       }
       if (( $status eq 'CLOSED' ) ||
    ( $status eq 'UNCHECKEDOUT') ||
    ( $status eq 'NOT_YET_VIEWED') ||
    ( $status eq 'BANNED') ||
    ( $status eq 'UNAVAILABLE') ||
    ( $status eq 'INVALID_ACCESS')) {
    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
    if ( $target eq "web" ) {
       $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
    } elsif ( $target eq 'tex' ) {
       if (not $ENV{'form.problem_split'}=~/yes/) {
    $result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
       } else {
    $result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
       }
    }
       } else {
    if ($target eq 'tex') {
       if (not $ENV{'form.problem_split'}=~/yes/) {
    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
       }
       my $weight = &Apache::lonnet::EXT("resource.$id.weight");
       my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'packages');
       my @allkeys = split /,/,$allkeys;
       my $allow_print_points = 0;
       foreach my $partial_key (@allkeys) {
    if ($partial_key=~m/^part_(.*)$/) {
       if ($1 ne '0') {$allow_print_points=1;}
    }
       }
       if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
    } elsif ($target eq 'web') {
       $result.='<a name="'.&Apache::lonnet::escape($Apache::inputtags::part).'" />';
    }
       }
    }
       } 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").
       '&nbsp;&nbsp;'.
   &Apache::edit::text_arg('Displayed Part Description:','display',$token).
    &Apache::edit::end_row().&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'id','display');
    if ($constructtag) {
       #limiting ids to only letters numbers, and space
       $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
       $result = &Apache::edit::rebuild_tag($token);
       $result.=&Apache::edit::handle_insert();
    }
     }      }
   }      return $result;
   return '';  
 }  }
   
 sub end_part {  sub end_part {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   &Apache::lonxml::debug("in end_part $target ");      &Apache::lonxml::debug("in end_part $target ");
   my $status=$Apache::inputtags::status['-1'];      my $status=$Apache::inputtags::status['-1'];
   pop @Apache::inputtags::status;      my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
   if ( $target eq 'meta' ) { return ''; }      my $result='';
   if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {      if ( $target eq 'meta' ) {
     return &Apache::inputtags::grade;   $result='';
   }      } elsif ($target eq 'grade') {
   if ($target eq 'web') {   if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
     return &Apache::inputtags::gradestatus($Apache::inputtags::part);      !$hidden) {
   }      $result=&Apache::inputtags::grade;
   return '';   } else {
       # move any submission data to .hidden
       &Apache::inputtags::hidealldata($Apache::inputtags::part);
    }
       } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
    my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
    $target);
    if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
       $gradestatus='';
    }
    $result=$gradestatus;
       } elsif ($target eq 'edit') {
    $result=&Apache::edit::end_table();
       }
       pop @Apache::inputtags::status;
       $Apache::inputtags::part='';
       return $result;
 }  }
   
 sub start_preduedate {  sub start_preduedate {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
     if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&   &Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
  $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {   if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
       &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);      $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
       &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
       &Apache::lonxml::get_all_text("/preduedate",$parser);
    }
     }      }
   }      return '';
   return '';  
 }  }
   
 sub end_preduedate {  sub end_preduedate {
   return '';      return '';
 }  }
   
 sub start_postanswerdate {  sub start_postanswerdate {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   if ($target eq 'web' || $target eq 'grade') {      if ($target eq 'web' || $target eq 'grade') {
     if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {   if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
       &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);      &Apache::lonxml::get_all_text("/postanswerdate",$parser);
    }
       } elsif ($target eq 'tex') {
    &Apache::lonxml::get_all_text("/postanswerdate",$parser);
     }      }
   }      return '';
   return '';  
 }  }
   
 sub end_postanswerdate {  sub end_postanswerdate {
   return '';      return '';
 }  }
   
 sub start_notsolved {  sub start_notsolved {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
     my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};   $target eq 'tex') {
     &Apache::lonxml::debug("not solved has :$gradestatus:");   my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
     if ($gradestatus =~ /^correct/) {   &Apache::lonxml::debug("not solved has :$gradestatus:");
       &Apache::lonxml::debug("skipping");   if ($gradestatus =~ /^correct/ &&
       &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);      &Apache::response::show_answer()) {
       &Apache::lonxml::debug("skipping");
       &Apache::lonxml::get_all_text("/notsolved",$parser);
    }
     }      }
   }      return '';
   return '';  
 }  }
   
 sub end_notsolved {  sub end_notsolved {
   return '';      return '';
 }  }
   
 sub start_solved {  sub start_solved {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {      if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
     my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};   $target eq 'tex') {
     if ($gradestatus !~ /^correct/) {   my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
       &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);   if ($gradestatus !~ /^correct/ ||
       !&Apache::response::show_answer()) {
       &Apache::lonxml::get_all_text("/solved",$parser);
    }
     }      }
   }      return '';
   return '';  
 }  }
   
 sub end_solved {  sub end_solved {
   return '';      return '';
   }
   
   sub start_problemtype {
       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 $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
    if (!defined($mode)) { $mode='show'; }
    my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
    my $found=0;
    foreach my $type (split(',',$for)) {
       if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
    }
    if ($mode eq 'show' && !$found) {
       &Apache::lonxml::get_all_text("/problemtype",$parser);
    }
    if ($mode eq 'hide' && $found) {
       &Apache::lonxml::get_all_text("/problemtype",$parser);
    }
       } elsif ($target eq 'edit') {
    $result .=&Apache::edit::tag_start($target,$token);
    $result.=&Apache::edit::select_arg('Mode:','mode',
      [['show','Show'],
       ['hide','Hide']]
      ,$token);
    $result .=&Apache::edit::checked_arg('When used as type(s):','for',
        [ ['exam','Exam/Quiz Problem'],
          ['survey','Survey'],
          ['problem','Homework Problem'] ]
        ,$token);
    $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
       } elsif ($target eq 'modified') {
    my $constructtag=&Apache::edit::get_new_args($token,$parstack,
        $safeeval,'mode','for');
    if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
       }
       return $result;
   }
   
   sub end_problemtype {
       return '';
 }  }
   
 sub start_startouttext {  sub start_startouttext {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my @result=(''.'');      my @result=(''.'');
   if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }      if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
   return (@result);      return (@result);
 }  }
   
 sub end_startouttext {  sub end_startouttext {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $result='';      my $result='';
   my $text='';      my $text='';
   
   if ($target eq 'edit') {      if ($target eq 'edit') {
     $text=&Apache::lonxml::get_all_text("endouttext",$$parser[-1]);   $text=&Apache::lonxml::get_all_text("endouttext",$parser);
     $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>   $result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
 <td>Delete:".  <td>".&mt('Delete:').
   &Apache::edit::deletelist($target,$token)                   &Apache::edit::deletelist($target,$token)
   ."</td>   ."</td>
 <td>".  <td>".
   &Apache::edit::insertlist($target,$token).                   &Apache::edit::insertlist($target,$token).
     "</td>   &Apache::edit::end_row().
 </tr><tr><td colspan=\"3\">\n".                   &Apache::edit::start_spanning_row()."\n"
  &Apache::edit::editfield($token->[1],$text,"",50,4);   . &Apache::loncommon::helpLatexCheatsheet () .
   }   &Apache::edit::editfield($token->[1],$text,"",80,4);
   if ($target eq 'modified') {      }
     $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);      if ($target eq 'modified') {
     $result='<startouttext />'.&Apache::edit::modifiedfield();   $result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
   }      }
   return $result;      if ($target eq 'tex') {
    $result .= '\noindent ';
       }
       return $result;
 }  }
   
 sub start_endouttext {  sub start_endouttext {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $result='';      my $result='';
   if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }      if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
   if ($target eq "modified") { $result='<endouttext />'; }      if ($target eq "modified") {
   return $result;   $result='<endouttext />'.
       &Apache::edit::handle_insertafter('startouttext'); }
       return $result;
 }  }
   
 sub end_endouttext {  sub end_endouttext {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my @result=('','');      my @result=('','');
   if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }      if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
   return (@result);      return (@result);
 }  }
   
 sub delete_startouttext {  sub delete_startouttext {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
 #  my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);      #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
   my $text=$$parser['-1']->get_text("/endouttext");      my $text=$$parser['-1']->get_text("/endouttext");
   my $ntoken=$$parser['-1']->get_token();      my $ntoken=$$parser['-1']->get_token();
   &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");      &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
   &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);      &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
   # Deleting 2 parallel tag pairs, but we need the numbers later to look like       # Deleting 2 parallel tag pairs, but we need the numbers later to look like
   # they did the last time round      # they did the last time round
   &Apache::lonxml::increasedepth($ntoken);      &Apache::lonxml::increasedepth($ntoken);
   &Apache::lonxml::decreasedepth($ntoken);      &Apache::lonxml::decreasedepth($ntoken);
   return 1;      return 1;
   }
   
   sub start_simpleeditbutton {
       my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
       my $result='';
       if (($target eq 'web') &&
           (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'}))) {
           my $url=$ENV{'request.noversionuri'};
           $url=~s/\?.*$//;
    $result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
                   '<a href="'.$url.'/smpedit">'.&mt('Simple Problem Editor').'</a> - '.&mt('Note: it can take up to 10 minutes for changes to take effect for all users.').
   &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
       }
       return $result;
   }
   
   sub end_simpleeditbutton {
       return '';
 }  }
   
 1;  1;
Removed from v.1.71  
changed lines
  Added in v.1.252

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