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Diff for /loncom/homework/structuretags.pm between versions 1.153 and 1.242

version 1.153, 2003/03/05 16:25:57 version 1.242, 2004/02/16 20:30:34
Line 36  use strict; Line 36  use strict;
 use Apache::lonnet;  use Apache::lonnet;
 use Apache::File();  use Apache::File();
 use Apache::lonmenu;  use Apache::lonmenu;
   use Apache::lonlocal;
   use Apache::lonxml;
   
 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','startouttext','endouttext',
 #  &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))  'simpleeditbutton','definetag'));
 }  }
   
 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);      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 56  sub end_web { Line 58  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);      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 69  sub end_tex { Line 72  sub end_tex {
 }  }
   
 sub page_start {  sub page_start {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my %found;      my %found;
   foreach my $taginside ($tagstack) {      foreach my $taginside (@$tagstack) {
     foreach my $taglookedfor ('html','body','form') {   foreach my $taglookedfor ('html','body','form') {
       if ($taginside =~ /^$taglookedfor$/i) { $found{$taglookedfor} = 1; }      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 $result;
  my ($symb)=&Apache::lonxml::whichuser();      my $head_tag_start;
  if ($symb eq '') {      if (!defined($found{'html'})) {
     my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");   $result=&Apache::londefdef::start_html($target,$token,$tagstack,
     $help="Browsing or <a href=\"/adm/ambiguous\">ambiguous</a> reference, submissions ignored $help<br />";         $parstack,$parser,$safeeval);
     $body_tag_start.=$help;   $head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$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,
     $safeeval);
    if ($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;
       }
    }
       }
       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);
   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();  #use Time::HiRes();
 sub get_resource_name {  sub get_resource_name {
   my ($parstack,$safeeval)=@_;      my ($parstack,$safeeval)=@_;
   my $name=&Apache::lonnet::gettitle();      if (defined($Apache::lonhomework::name)) {
   if ($name eq '') {   return $Apache::lonhomework::name;
     $name=&Apache::lonnet::EXT('resource.title');      }
     if ($name eq 'con_lost') { $name = ''; }      my $name=&Apache::lonnet::gettitle();
   }      if ($name eq '') {
   $Apache::lonhomework::name=$name;   $name=&Apache::lonnet::EXT('resource.title');
   return $name;   if ($name eq 'con_lost') { $name = ''; }
       }
       if ($name!~/\S+/) {
    $name=$ENV{'request.uri'};
    $name=~s-.*/([^/]+)$-$1-;
       }
       $Apache::lonhomework::name=$name;
       return $name;
 }  }
   
 sub setup_rndseed {  sub setup_rndseed {
   my ($safeeval)=@_;      my ($safeeval)=@_;
   my $rndseed;      my $rndseed;
   if ($ENV{'request.state'} eq "construct") {      my ($symb)=&Apache::lonxml::whichuser();
     $rndseed=$ENV{'form.rndseed'};      if ($ENV{'request.state'} eq "construct" || $symb eq '') {
     if (!$rndseed) {   $rndseed=$ENV{'form.rndseed'};
       $rndseed=time;   if (!$rndseed) {
       $ENV{'form.rndseed'}=$rndseed;      $rndseed=$Apache::lonhomework::history{'rndseed'};
     }      if (!$rndseed) {
     &Apache::lonxml::debug("Setting rndseed to $rndseed");   $rndseed=time;
     &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);      }
   }      $ENV{'form.rndseed'}=$rndseed;
   return $rndseed;   }
    if ($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 ($safeeval) {
       &Apache::lonxml::debug("Setting rndseed to $rndseed");
       &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
    }
       }
       return $rndseed;
 }  }
   
 sub problem_edit_header {  sub problem_edit_header {
   return '<input type="hidden" name="submitted" value="edit" />      return '<input type="hidden" name="submitted" value="edit" />
        <input type="hidden" name="problemmode" value="Edit" />         <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
        <input type="submit" name="problemmode" value="Discard Edits and View" />         <input type="submit" name="problemmode" value="'.&mt('Discard Edits and View').'" />
        <input type="submit" name="problemmode" value="EditXML" />         <input type="submit" name="problemmode" value="'.&mt('EditXML').'" />
        <input type="submit" name="Undo" value="undo" /> <hr />         <input type="submit" name="Undo" value="'.&mt('undo').'" /> <hr />
        <input type="submit" name="submit" value="Submit Changes and Edit" />         <input type="submit" name="submit" value="'.&mt('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">         <input type="submit" name="submit" 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 {  sub problem_edit_footer {
   return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />      return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
     <input type="submit" name="submit" value="Submit Changes and View" />';      <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 {  sub problem_web_to_edit_header {
   my ($rndseed)=@_;      my ($rndseed)=@_;
   my $result.='<input type="hidden" name="problemmode" value="View" />      my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />
              <input type="submit" name="problemmode" value="Edit" />               <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
              <input type="submit" name="problemmode" value="EditXML" />               <input type="submit" name="problemmode" value="'.&mt('EditXML').'" />
              Random Seed:<input type="text" name="rndseed" width="10" value="'.               <input type="submit" name="newrandomization" value="'.&mt('New Randomization').'" />
        $rndseed.'" />               <input type="submit" name="resetdata" value="'.&mt('Reset Submissions').'" />
              <input type="submit" name="changerandseed" value="Change" />               <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
              <input type="submit" name="resetdata" value="Reset Submissions" />                <input type="text" name="rndseed" width="10" value="'.
          $rndseed.'"
              onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
              <input type="checkbox" name="showallfoils" ';               <input type="checkbox" name="showallfoils" ';
   if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }      if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
   $result.= ' />&nbsp;Show&nbsp;All&nbsp;Foils      $result.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
              <hr />';   &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
   my $numtoanalyze=$ENV{'form.numtoanalyze'};   '<hr />';
   if (!$numtoanalyze) { $numtoanalyze=100; }      $result.="
   $result.= '<input type="submit" name="problemmode" value="Answer Distribution" />  <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="'.               <input type="text" name="numtoanalyze" value="'.
        $numtoanalyze.'" size="5" /> <hr />';       $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
   return $result;       '.'.&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' || $symb eq '') {
       &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$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 205  sub initialize_storage { Line 292  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::tmpstore(\%Apache::lonhomework::results,      $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
       $ENV{'request.uri'},'',$domain,$name);      $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
       &Apache::lonxml::debug('Construct Store return message:'.$result);   $ENV{'request.uri'},'',$domain,$name);
     } else {      &Apache::lonxml::debug('Construct Store return message:'.$result);
       $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,   } else {
       $symb,$courseid,$domain,$name);      $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
       &Apache::lonxml::debug('Store return message:'.$result);      $symb,$courseid,$domain,$name);
       &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);
   <h2>$lt{'resource'}</h2>
       <p>$lt{'id_expln'}</p>
   <font color="red">
   <p>$lt{'warning'}</p>
 </font>  </font>
 <form name="checkout" method="POST" action="$ENV{'request.uri'}">  <form name="checkout" method="POST" action="$ENV{'request.uri'}">
 <input type="hidden" name="doescheckout" value="yes" />  <input type="hidden" name="doescheckout" value="yes" />
 <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />  <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
 </form>  </form>
 ENDCHECKOUT  ENDCHECKOUT
 }  }
   
   sub init_problem_globals {
       my ($type)=@_;
       #initialize globals
       if ($type eq 'problem') {
    $Apache::inputtags::part='0';
    @Apache::inputtags::partlist=('0');
   
    $Apache::lonhomework::problemstatus=&get_problem_status('0')
       } else {
    $Apache::inputtags::part='';
    @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';
       }
   }
   
   sub get_problem_status {
       my ($part)=@_;
       my $problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
       &Apache::lonxml::debug("problem status for $part is $problem_status");
       &Apache::lonxml::debug("env probstat is ".$ENV{'form.problemstatus'});
       if ($ENV{'request.state'} eq 'construct' &&
    defined($ENV{'form.problemstatus'})) {
    $problem_status=$ENV{'form.problemstatus'};
       }
       return $problem_status;
   }
   
 sub start_problem {  sub start_problem {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   
   # meta is called from lonpublisher, which doesn't uses the normal      if ( $Apache::inputtags::part ne '' ||
   # lonhomework method of parsing the file which means that inputtags    $Apache::lonhomework::parsing_a_problem) {
   # won't get reset   &Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
   if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {   #my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
     &Apache::lonxml::error('Only one problem allowed in a .problem file');   return '';
     my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);  
     return '';  
   }  
 #intialize globals  
   $Apache::inputtags::part='0';  
   @Apache::inputtags::responselist = ();  
   @Apache::inputtags::previous=();  
   $Apache::structuretags::printanswer='No';  
   if ($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:");      $Apache::lonhomework::parsing_a_problem=1;
   }      &init_problem_globals('problem');
   if ($Apache::lonhomework::type eq '') {  
     my $uri=$ENV{'request.uri'};      if (defined($ENV{'scantron.maxquest'})) {
     if ($uri=~/\.(\w+)$/) {   $Apache::lonhomework::scantronmode=1;
       $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      if ($target ne 'analyze') {
   my $expression='$external::part='.$Apache::inputtags::part.';';   &initialize_storage();
   &Apache::run::run($expression,$safeeval);   if ($target eq 'web') {
   my $status;      &Apache::lonhomework::showhash(%Apache::lonhomework::history);
   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);  
     ($status,$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') {          if ($ENV{'request.state'} eq 'construct') { &set_problem_state('0'); }
     $msg.='The problem '.$accessmsg;   $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
  } elsif ($status eq 'UNCHECKEDOUT') {   if (($ENV{'request.state'} eq 'construct') &&
             $msg.=&checkout_msg;      defined($ENV{'form.problemtype'})) {
         }      $Apache::lonhomework::type=$ENV{'form.problemtype'};
  $result.=$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 $accessmsg \\vskip 0 mm ";  
  }   }
       }   &Apache::lonxml::debug("Found this to be of type :$Apache::ltonhomework::type:");
     } elsif ($target eq 'web') {      }
       my $name= &get_resource_name($parstack,$safeeval);      if ($Apache::lonhomework::type eq '' ) {
       if ($status eq 'CAN_ANSWER') {   my $uri=$ENV{'request.uri'};
  # create a page header and exit   if ($uri=~/\.(\w+)$/) {
  $result.="$head_tag_start<title>$name</title></head>      $Apache::lonhomework::type=$1;
               $body_tag_start \n $form_tag_start".      &Apache::lonxml::debug("Using type of $1");
  '<input type="hidden" name="submitted" value="yes" />';  
  if ($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 $name= &Apache::lonxml::get_param('name',$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 {   } else {
     $temp_file = Apache::File->new('>>'.$filename);       $Apache::lonhomework::type='problem';
       &Apache::lonxml::debug("Using default type, problem, :$uri:");
    }
       }
   
       #added vars to the scripting enviroment
       my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
       &Apache::run::run($expression,$safeeval);
       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,$token);
  }   }
  my @due_file_content = <$temp_file>;  
  my $due_file_content = $due_file_content[$#due_file_content];   #handle rand seed in construction space
         chomp $due_file_content;   my $rndseed=&setup_rndseed($safeeval);
  my $name_of_resourse= &get_resource_name($parstack,$safeeval);   my ($symb)=&Apache::lonxml::whichuser();
         if ($due_file_content ne $duedate) {       if ($ENV{'request.state'} ne "construct" && $symb eq '') {
  $temp_file = Apache::File->new('>'.$filename);       $form_tag_start.='<input type="hidden" name="rndseed" value="'.
     print $temp_file "$duedate\n";       $rndseed.'" />'.
     if (not $ENV{'request.symb'} =~ m/\.page_/) {      '<input type="submit" name="resetdata"
  if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {                               value="'.&mt('New Problem Variation').'" />'.
     $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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 \begin{minipage}{\textwidth}';      '<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') ||
       ( $status eq 'INVALID_ACCESS')) {
       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>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
  } else {   } 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\begin{minipage}{\textwidth}';      $result.='<h1>'.&mt('Not open to be viewed').'</h1>';
     if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}   }
    if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
       $msg.='The problem '.$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.=&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 {      } else {
  $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';   $temp_file = Apache::File->new('>>'.$filename);
     }       }
  } else {      my @due_file_content = <$temp_file>;
     if (not $ENV{'request.symb'} =~ m/\.page_/) {      my $due_file_content = $due_file_content[$#due_file_content];
  $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent\begin{minipage}{\textwidth}';      chomp $due_file_content;
  if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}      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 {      } else {
  $result .= '\vskip 1mm \\\\\\\\';   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
    $result = '';
     }      }
   } elsif ($target eq 'edit') {      return $result;
     $result.=$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,$tagstack,$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' || $target eq 'tex') {      if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
     if ( $target eq 'grade' && $Apache::inputtags::part eq '0' && $status eq 'CAN_ANSWER' ) {   $target eq 'tex') {
       # if part is zero, no <part>s existed, so we need to the grading   if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
       &Apache::inputtags::grade;       ($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode)) {
     } elsif ( ($target eq 'web' || $target eq 'tex') && $Apache::inputtags::part eq '0' &&       # if part is zero, no <part>s existed, so we need to the grading
       $status ne 'UNCHECKEDOUT') {      &Apache::inputtags::grade;
       # if part is zero, no <part>s existed, so we need show the current    } elsif ( ($target eq 'web' || $target eq 'tex') &&
       # grading status    $Apache::inputtags::part eq '0' &&
       my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);    $status ne 'UNCHECKEDOUT') {
       if ($Apache::lonhomework::type ne 'exam') {$result.= $gradestatus;}      # if part is zero, no <part>s existed, so we need show the current
     }      # grading status
     if (      my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
  (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||      $result.= $gradestatus;
  ($target eq 'answer') || ($target eq 'tex')   }
        ) {   if (
       if ($status eq 'CAN_ANSWER') {      (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
   if ($target ne 'tex') {      ($target eq 'answer') || ($target eq 'tex')
       $result.="</form></body>\n";     ) {
   }       if ($target ne 'tex' &&
       } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||   $ENV{'form.answer_output_mode'} ne 'tex') {
        $status eq 'UNCHECKEDOUT' ) {   $result.="</form></body>\n";
   if ($target ne 'tex') {      }
       $result.="</body>\n";      if ($target eq 'web') {
   }   $result.=&Apache::lonxml::xmlend();
       }      } elsif ($target eq 'tex') {
       if ($target eq 'web') {   my $endminipage = '';
   $result.=&Apache::lonxml::xmlend();   if (not $ENV{'form.problem_split'}=~/yes/) {
       } elsif ($target eq 'tex') {      $endminipage = '\end{minipage}';
   $result .= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';   }
   if (not $ENV{'request.symb'} =~ m/\.page_/) {   $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
       $result .= '\end{minipage}\end{document} ';   if (not $ENV{'request.symb'} =~ m/\.page_/) {
   } else {      $result .= $endminipage.'\end{document} ';
       $result .= '';   } else {
   }      $result .= '';
       }   }
     }      }
     if ($target eq 'grade') {    }
       &Apache::lonhomework::showhash(%Apache::lonhomework::results);   if ($target eq 'grade') {
       &finalize_storage();      &Apache::lonhomework::showhash(%Apache::lonhomework::results);
     }      &finalize_storage();
     if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct') ) {   }
  $result.='</html>'; #normally we get it from xmlend, but in CSTR   if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
                             # we always show answer mode too.      && $ENV{'form.answer_output_mode'} ne 'tex') {
     }      $result.='</html>'; # normally we get it from xmlend, but in CSTR
   } elsif ($target eq 'meta') {                          # we always show answer mode too.
     if ($Apache::inputtags::part eq '0') {   }
       $result=&Apache::response::mandatory_part_meta;      } elsif ($target eq 'meta') {
     }   if ($Apache::inputtags::part eq '0') {
   } elsif ($target eq 'edit') {      @Apache::inputtags::response=();
     &Apache::lonxml::debug("in end_problem with $target, edit");      $result=&Apache::response::mandatory_part_meta;
     $result = &problem_edit_footer();   }
   }   $result.=&Apache::response::meta_part_order();
   return $result;      } elsif ($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,$body_tag_start,$form_tag_start);      my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
       if ($$tagstack[0] eq 'library') { &init_problem_globals('library') };
   if ($target eq 'edit') {      if ($target eq 'edit') {
     ($result,$head_tag_start,$body_tag_start,$form_tag_start)=   ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
       &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);      &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
     $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.   $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
       &problem_edit_header();      &problem_edit_header();
     my $temp=&Apache::edit::insertlist($target,$token);   my $temp=&Apache::edit::insertlist($target,$token);
     $result.=$temp;   $result.=$temp;
   } elsif ($target eq 'modified') {      } elsif ($target eq 'modified') {
     $result=$token->[4];   $result=$token->[4];
     $result.=&Apache::edit::handle_insert();   $result.=&Apache::edit::handle_insert();
   } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&      } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
    $ENV{'request.state'} eq "construct" ) {       $ENV{'request.state'} eq "construct" ) {
     ($result,$head_tag_start,$body_tag_start,$form_tag_start)=   ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
       &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);      &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
     my $name=&get_resource_name($parstack,$safeeval);   my $name=&get_resource_name($parstack,$safeeval);
     my $rndseed=&setup_rndseed($safeeval);   my $rndseed=&setup_rndseed($safeeval);
     $result.="$head_tag_start<title>$name</title></head>   $result.="$head_tag_start<title>$name</title></head>
               $body_tag_start \n $form_tag_start".                $body_tag_start \n $form_tag_start".
  '<input type="hidden" name="submitted" value="yes" />';    '<input type="hidden" name="submitted" value="yes" />';
     $result.=&problem_web_to_edit_header($rndseed);   $result.=&problem_web_to_edit_header($rndseed);
   }      }
   return $result;      return $result;
 }  }
   
 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=&problem_edit_footer();   $result=&problem_edit_footer();
   } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&      } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
    $ENV{'request.state'} eq "construct") {       $ENV{'request.state'} eq "construct") {
     $result.='</form></body>'.&Apache::lonxml::xmlend();   $result.='</form></body>'.&Apache::lonxml::xmlend();
   }      }
   return $result;      if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
       return $result;
 }  }
   
 sub start_block {  sub start_definetag {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   
     my $result;      my $result;
   
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||       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 {
       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') {   $target eq 'tex' || $target eq 'analyze') {
  my $code = @$parstack[$#$parstack];   my $code = $token->[2]->{'condition'};
  if ($code) {   if (defined($code)) {
     $code =~ s/\"//g;  
     $code .=';return $condition;';  
     if (!$Apache::lonxml::default_homework_loaded) {      if (!$Apache::lonxml::default_homework_loaded) {
  &Apache::lonxml::default_homework_load($safeeval);   &Apache::lonxml::default_homework_load($safeeval);
     }      }
Line 540  sub start_block { Line 736  sub start_block {
     $result='1';      $result='1';
  }   }
  if ( ! $result ) {   if ( ! $result ) {
     my $skip=&Apache::lonxml::get_all_text("/block",$parser);      my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
     &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");      &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
  }   }
  $result='';   $result='';
Line 558  sub start_block { Line 754  sub start_block {
 }  }
   
 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, $code);   
   if (!$Apache::lonxml::default_homework_loaded) {   push( @Apache::structuretags::whileconds, $code);
       &Apache::lonxml::default_homework_load($safeeval);   if (!$Apache::lonxml::default_homework_loaded) {
   }      &Apache::lonxml::default_homework_load($safeeval);
   my $result = &Apache::run::run($code,$safeeval);   }
   my $bodytext=$$parser[$#$parser]->get_text("/while");   my $result = &Apache::run::run($code,$safeeval);
   push( @Apache::structuretags::whilebody, $bodytext);   my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
   if ( $result ) {    push( @Apache::structuretags::whilebody, $bodytext);
     &Apache::lonxml::newparser($parser,\$bodytext);   push( @Apache::structuretags::whileline, $token->[5]);
   }   &Apache::lonxml::debug("s code $code got -$result-");
   return "";   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 show="1">   # <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)=@_;
   my $result;      my $result;
   if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||      if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
       $target eq 'tex' || $target eq 'analyze') {   $target eq 'tex' || $target eq 'analyze') {
     my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);   my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
     my $b_parser= HTML::TokeParser->new(\$body);   my $b_parser= HTML::TokeParser->new(\$body);
     my $b_tok;   my $b_tok;
     my @randomlist;   my @randomlist;
     my $list_item;   my $list_item;
     while($b_tok = $b_parser->get_token() ) {   while($b_tok = $b_parser->get_token() ) {
       if($b_tok->[0] eq 'S') { # start tag      if($b_tok->[0] eq 'S') { # start tag
  # get content of the tag until matching end tag   # get content of the tag until matching end tag
  # get all text upto the matching tag   # get all text upto the matching tag
  # and push the content into @randomlist   # and push the content into @randomlist
  $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);   $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
  $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";     $b_parser);
  push(@randomlist,$list_item);   $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
  #  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";   push(@randomlist,$list_item);
       }   #  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
       if($b_tok->[0] eq 'T') { # text                  #         $list_item</b>";
  # what to do with text in between tags?      }
  #  print "<b>TEXT $b_tok->[1]</b><br />";      if($b_tok->[0] eq 'T') { # text
       }   # what to do with text in between tags?
       # if($b_tok->[0] eq 'E') { # end tag, should not happen   #  print "<b>TEXT $b_tok->[1]</b><br />";
       #  print "<b>END-TAG $b_tok->[1]</b><br />";      }
       # }      # if($b_tok->[0] eq 'E') { # end tag, should not happen
     }      #  print "<b>END-TAG $b_tok->[1]</b><br />";
     my @idx_arr = (0 .. $#randomlist);      # }
     &Apache::structuretags::shuffle(\@idx_arr);   }
     my $bodytext = '';   my @idx_arr = (0 .. $#randomlist);
     my $show=$#randomlist;   &Apache::structuretags::shuffle(\@idx_arr);
     my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);   my $bodytext = '';
     $showarg--;   my $show=$#randomlist;
     if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }   my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
     for(0 .. $show) {   $showarg--;
       $bodytext .= "$randomlist[ $idx_arr[$_] ]";   if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
     }   for(0 .. $show) {
     &Apache::lonxml::newparser($parser,\$bodytext);      $bodytext .= "$randomlist[ $idx_arr[$_] ]";
   } elsif ($target eq 'edit' ) {   }
     $result .= &Apache::edit::tag_start($target,$token);   &Apache::lonxml::newparser($parser,\$bodytext);
     $result .= &Apache::edit::text_arg('Maximum Tags to Show:','show',$token,5);      } elsif ($target eq 'edit' ) {
     $result .= &Apache::edit::end_row().&Apache::edit::start_spanning_row();   $result .=&Apache::edit::tag_start($target,$token);
   } elsif ($target eq 'modified' ) {   $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
     my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,     $token,5);
  'show');   $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
     if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }      } elsif ($target eq 'modified' ) {
   }   my $constructtag=&Apache::edit::get_new_args($token,$parstack,
   return $result;       $safeeval,'show');
    if ($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(@$a)) {
       &Apache::response::setrandomnumber();   &Apache::response::setrandomnumber();
       for($i=@$a;--$i;) {   for($i=@$a;--$i;) {
  my $j=int(&Math::Random::random_uniform() * ($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];
       }   }
     }      }
 }  }
   
 sub end_randomlist {  sub end_randomlist {
   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' ) {
     $result=&Apache::edit::tag_end($target,$token,'End Randomly Parsed Block');   $result=&Apache::edit::tag_end($target,$token,
   }         'End Randomly Parsed Block');
   return $result;      }
       return $result;
 }  }
   
 sub start_part {  sub start_part {
   my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;      my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $result='';      my $result='';
   my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);      my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
   if ($id eq '') { $id = $Apache::lonxml::curdepth; }      if ($id eq '') { $id = $Apache::lonxml::curdepth; }
   $Apache::inputtags::part=$id;      $Apache::inputtags::part=$id;
   @Apache::inputtags::responselist = ();      push(@Apache::inputtags::partlist,$id);
   @Apache::inputtags::previous=();      @Apache::inputtags::response=();
   my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);      @Apache::inputtags::previous=();
       @Apache::inputtags::previous_version=();
   if ($target eq 'meta') {      $Apache::lonhomework::problemstatus=&get_problem_status($id);
     return &Apache::response::mandatory_part_meta;      my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
   } elsif ($target eq 'web' || $target eq 'grade' ||      my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
    $target eq 'answer' || $target eq 'tex') {      &Apache::run::run($expression,$safeeval);
       if ($hidden) {  
   my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);      if ($target eq 'meta') {
       } else {   my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
   my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);   return &Apache::response::mandatory_part_meta.
   push (@Apache::inputtags::status,$status);         &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
   my $expression='$external::datestatus="'.$status.'";';      } elsif ($target eq 'web' || $target eq 'grade' ||
   $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';       $target eq 'answer' || $target eq 'tex') {
   &Apache::run::run($expression,$safeeval);   if ($hidden) {
   if ( $status eq 'CLOSED' ) {      my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
       my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);   } else {
       if ( $target eq "web" ) {      my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
   $result="<br />Part is not open to be viewed. It $accessmsg<br />";      push (@Apache::inputtags::status,$status);
       } elsif ( $target eq 'tex' ) {      my $expression='$external::datestatus="'.$status.'";';
   $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";      $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
       }      &Apache::run::run($expression,$safeeval);
   } else {      if ($ENV{'request.state'} eq 'construct') {
       if ($target eq 'tex') {   &set_problem_state($Apache::inputtags::part); 
  $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';      }
  my $weight = &Apache::lonnet::EXT("resource.$id.weight");      if (( $status eq 'CLOSED' ) ||
  if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}   ( $status eq 'UNCHECKEDOUT') ||
       }   ( $status eq 'BANNED') ||
   }   ( $status eq 'UNAVAILABLE') ||
       }   ( $status eq 'INVALID_ACCESS')) {
   } elsif ($target eq 'edit') {   my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
       $result.=&Apache::edit::tag_start($target,$token);   if ( $target eq "web" ) {
       $result.=&Apache::edit::text_arg('Part ID:','id',$token).      $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
   &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").   } elsif ( $target eq 'tex' ) {
       &Apache::edit::end_row().&Apache::edit::start_spanning_row();      if (not $ENV{'form.problem_split'}=~/yes/) {
    $result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
   } elsif ($target eq 'modified') {      } else {
       my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,   $result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
    'id');      }
       if ($constructtag) {   }
   $result = &Apache::edit::rebuild_tag($token);      } else {
   $result.=&Apache::edit::handle_insert();   if ($target eq 'tex') {
       }      if (not $ENV{'form.problem_split'}=~/yes/) {
   }   $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
   return $result;      }
       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;
 }  }
   
 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'];
   my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);      my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
   my $result='';      my $result='';
   if ( $target eq 'meta' ) {      if ( $target eq 'meta' ) {
       $result='';   $result='';
   } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {      } elsif ($target eq 'grade' && 
     $result=&Apache::inputtags::grade;       ($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
   } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {       !$hidden) {
     my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,   $result=&Apache::inputtags::grade;
     $target);      } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
     if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}   my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
     $result=$gradestatus;   $target);
   }   if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
   pop @Apache::inputtags::status;      $gradestatus='';
   return $result;   }
    $result=$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' || $target eq 'tex') {      if ($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::inputtags::status['-1'] ne 'SHOW_ANSWER') {      $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
       &Apache::lonxml::get_all_text("/preduedate",$parser);      &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' || $target eq 'tex') {      if ($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);      &Apache::lonxml::get_all_text("/postanswerdate",$parser);
     }   }
   } elsif ($target eq 'tex') {      } elsif ($target eq 'tex') {
       return '\vskip 0 mm \noindent';   &Apache::lonxml::get_all_text("/postanswerdate",$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' || $target eq 'tex') {      if ($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",$parser);      &Apache::response::show_answer()) {
       &Apache::lonxml::debug("skipping");
       &Apache::lonxml::get_all_text("/notsolved",$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' || $target eq 'tex') {      if ($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);   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_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);   $text=&Apache::lonxml::get_all_text("endouttext",$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).
     &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n"   &Apache::edit::end_row().
  .'<table><tr><td>'.                   &Apache::edit::start_spanning_row()."\n"
     &Apache::loncommon::help_open_topic("Greek_Symbols",'Greek Symbols',   . &Apache::loncommon::helpLatexCheatsheet () .
  undef,undef,600)   &Apache::edit::editfield($token->[1],$text,"",80,4);
  .'</td><td>'.      }
     &Apache::loncommon::help_open_topic("Other_Symbols",'Other Symbols',      if ($target eq 'modified') {
  undef,undef,600)   $result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
  .'</td></tr></table>'.      }
     &Apache::edit::editfield($token->[1],$text,"",80,4);      if ($target eq 'tex') {
   }   $result .= '\noindent ';
   if ($target eq 'modified') {      }
     $text=&Apache::lonxml::get_all_text("endouttext",$parser);      return $result;
     $result='<startouttext />'.&Apache::edit::modifiedfield();  
   }  
   if ($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") {       if ($target eq "modified") {
      $result='<endouttext />'.   $result='<endouttext />'.
      &Apache::edit::handle_insertafter('startouttext'); }      &Apache::edit::handle_insertafter('startouttext'); }
   return $result;      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);      #  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.1.153  
changed lines
  Added in v.1.242

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