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Diff for /loncom/homework/structuretags.pm between versions 1.17 and 1.83

version 1.17, 2000/11/29 00:51:57 version 1.83, 2002/03/01 00:23:04
Line 1 Line 1
 # The LearningOnline Network with CAPA # <script> definiton  # The LearningOnline Network with CAPA 
   # definition of tags that give a structure to a document
   #
   # $Id$
   #
   # Copyright Michigan State University Board of Trustees
   #
   # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
   #
   # LON-CAPA is free software; you can redistribute it and/or modify
   # it under the terms of the GNU General Public License as published by
   # the Free Software Foundation; either version 2 of the License, or
   # (at your option) any later version.
   #
   # LON-CAPA is distributed in the hope that it will be useful,
   # but WITHOUT ANY WARRANTY; without even the implied warranty of
   # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   # GNU General Public License for more details.
   #
   # You should have received a copy of the GNU General Public License
   # along with LON-CAPA; if not, write to the Free Software
   # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   #
   # /home/httpd/html/adm/gpl.txt
   #
   # http://www.lon-capa.org/
   #
   # 2/19 Guy
   # 6/26/2001 fixed extra web display at end of <web></web> tags
   # 8/17,8/18,8/20 Gerd Kortemeyer
   
 package Apache::structuretags;   package Apache::structuretags; 
   
 use strict;  use strict;
 use Apache::lonnet;  use Apache::lonnet;
   
 sub BEGIN {  BEGIN {
   &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','web','tex','part'));    &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
   #  &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))
 }  }
   
 sub start_web {  sub start_web {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);    my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
   return $bodytext;    if ($target eq 'web') {
       return $bodytext;
     } 
     return '';
 }  }
   
 sub end_web {  sub end_web {
       return '';
 }  }
   
 sub start_tex {  sub start_tex {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);    my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
     if ($target eq 'tex') {
       return $bodytext
     }
   return '';    return '';
 }  }
   
 sub end_tex {  sub end_tex {
       return '';
   }
   
   sub page_start {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my %found;
     foreach my $taginside ($tagstack) {
       foreach my $taglookedfor ('html','body','form') {
         if ($taginside =~ /^$taglookedfor$/i) { $found{$taglookedfor} = 1; }
       }
     }
   
     my $result;
     my $head_tag_start;
     if (!defined($found{'html'})) {
       $result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack,
      $parser,$safeeval);
       $head_tag_start='<head>'.&Apache::lonxml::registerurl();
     }
     my $body_tag_start;
     if (!defined($found{'body'})) {
       $body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '.
         'onUnload="'.&Apache::lonxml::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"';
         }
       }
       $body_tag_start.='>';
     }
     return ($result,$head_tag_start,$body_tag_start);
   }
   
   sub initialize_storage {
     %Apache::lonhomework::results=();
     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
     if ($ENV{'request.state'} eq 'construct') {
       %Apache::lonhomework::history=
         &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
       my ($temp)=keys %Apache::lonhomework::history ;
       &Apache::lonxml::debug("Return message of $temp");
     } else {
       %Apache::lonhomework::history=
         &Apache::lonnet::restore($symb,$courseid,$domain,$name);
     }
     #ignore error conditions
     my ($temp)=keys %Apache::lonhomework::history ;
     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
   }
   
   # -------------------------------------------------------------finalize_storage
   # Stores away the result has to a student's environment
   # checks form.grade_ for specific values, other wises stores
   # to the running users environment
   sub finalize_storage {
     my $result;
     my ($temp) = keys %Apache::lonhomework::results;
     if ( $temp ne '' ) {
       my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
       if ($ENV{'request.state'} eq 'construct') {
         $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
         $ENV{'request.uri'},'',$domain,$name);
         &Apache::lonxml::debug('Construct Store return message:'.$result);
       } else {
         $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
         $symb,$courseid,$domain,$name);
         &Apache::lonxml::debug('Store return message:'.$result);
       }
     }
     return $result;
   }
   
   sub checkout_msg {
   return (<<ENDCHECKOUT);
   <h2>The resource needs to be checked out</h2>
   As a resource gets checked out, a unique timestamped ID is given to it, and a
   permanent record is left in the system.<p />
   <font color=red>
   Checking out resources is subject to course policies, and may exclude future
   credit even if done erroneously.<p />
   </font>  
   <form method=post>
   <input type=button name="doescheckout" 
   value="Check out Exam for Viewing" 
   onClick="if (confirm('Check out Exam?')) { this.form.submit(); }" />
   </form>
   ENDCHECKOUT
 }  }
   
 sub start_problem {  sub start_problem {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   unless ($target eq 'meta') {  
     my $args ='';    # meta is called from lonpublisher, which doesn't uses the normal
     if ( $#$parstack > -1 ) {    # lonhomework method of parsing the file which means that inputtags 
       $args=$$parstack[$#$parstack];    # won't get reset
     }    if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
     my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);      &Apache::lonxml::error('Only one problem allowed in a .problem file');
     $Apache::inputtags::part='0';      my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[-1]);
     my $expression='$external::part='.$Apache::inputtags::part.';';      return '';
     $safeeval->share_from('Apache::inputtags',['@part']);    }
   #intialize globals
     $Apache::inputtags::part='0';
     @Apache::inputtags::responselist = ();
     @Apache::inputtags::previous=();
     &initialize_storage();
     if ($target eq 'web') {
       &Apache::lonhomework::showhash(%Apache::lonhomework::history);
     }
     $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
     &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
     if ($Apache::lonhomework::type eq '') {
       my $uri=$ENV{'request.uri'};
       if ($uri=~/\.(\w+)$/) {
         $Apache::lonhomework::type=$1;
         &Apache::lonxml::debug("Using type of $1");
       } else {
         $Apache::lonhomework::type='problem';
         &Apache::lonxml::debug("Using default type, problem, :$uri:");
       }
     }
   
     #added vars to the scripting enviroment
     my $expression='$external::part='.$Apache::inputtags::part.';';
     &Apache::run::run($expression,$safeeval);
     my $status;
     my $accessmsg;
   
     #should get back a <html> or the neccesary stuff to start XML/MathML
     my ($result,$head_tag_start,$body_tag_start)=
       &page_start($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);
       }
   
       #handle rand seed in construction space
       my $rndseed;
       if ($ENV{'request.state'} eq "construct") {
         $rndseed=$ENV{'form.rndseed'};
         if (!$rndseed) {
    $rndseed=time;
    $ENV{'form.rndseed'}=$rndseed;
         }
         &Apache::run::run('$external::randomseed='.$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,$safeeval);      &Apache::run::run($expression,$safeeval);
     return "<title>$name</title>\n<body bgcolor=#FFFFFF>\n<form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">";      if (( $status eq 'CLOSED' ) ||
   }           ( $status eq 'UNCHECKEDOUT') ||
           ( $status eq 'BANNED')) {
         my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
         if ( $target eq "web" ) {
    $result.= $head_tag_start.'</head>';
           my $msg=$body_tag_start.
       '<h1>Not open to be viewed</h1>';
           if ($status eq 'CLOSED') {
       $msg.='The problem '.$accessmsg;
    } elsif ($status eq 'UNCHECKEDOUT') {
               $msg.=&checkout_msg;
           }
    $result.=$msg.'<br />';
         }
       } elsif ($target eq 'web') {
         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;
         if ($status eq 'CAN_ANSWER') {
    # create a page header and exit
    $result.="$head_tag_start<title>$name</title></head>\n
                 $body_tag_start\n
                 <form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".
    '<input type="hidden" name="submitted" value="yes" />';
    if ($ENV{'request.state'} eq "construct") {
     $result.=
       '<input type="hidden" name="problemmode" value="View" />
                <input type="submit" name="problemmode" value="Edit" />
                <input type="submit" name="problemmode" value="EditXML" />
                Random Seed:<input type="text" name="rndseed" width="10" value="'.
          $rndseed.'" />
                <input type="submit" name="changerandseed" value="Change" />
                <input type="submit" name="resetdata" value="Reset Submissions" />
                <hr />';
    }
    # 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') {
    $result.=$head_tag_start.
     "<title>$name</title></head>\n$body_tag_start\n";
         }
       }
     } elsif ($target eq 'edit') {
       $result.=$head_tag_start."</head>".$body_tag_start.
         '<form name="lonhomework" method="POST" action="'.
    $ENV{'request.uri'}.'">
          <input type="hidden" name="submitted" value="edit" />
          <input type="hidden" name="problemmode" value="Edit" />
          <input type="submit" name="problemmode" value="View" />
          <input type="submit" name="problemmode" value="EditXML" />
          <input type="submit" name="Undo" value="undo" /> <hr />
          <input type="submit" name="submit" value="Submit Changes" /><br />
         ';
       my $temp=&Apache::edit::insertlist($target,$token);
       $result.=$temp;
     } elsif ($target eq 'modified') {
       $result=$token->[4];
       $result.=&Apache::edit::handle_insert();
     } elsif ($target eq 'tex') {
         $result .= '\begin{document}\noindent\textbf{Problem.}\newline';
     } else {
       # page_start returned a starting result, delete it if we don't need it
       $result = '';
     }
     return $result;
 }  }
   
 sub end_problem {  sub end_problem {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $result='';    my $result='';
   unless ($target eq 'meta') {    my $status=$Apache::inputtags::status['-1'];
     $result="</form></body>\n";    if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ) {
   } else {      if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
     if ($Apache::inputtags::part ne '0') {        # if part is zero, no <part>s existed, so we need to the grading
         &Apache::inputtags::grade;
       } elsif ( $target eq 'web' && $Apache::inputtags::part eq '0') {
         # if part is zero, no <part>s existed, so we need show the current 
         # grading status
         $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
       }
       if (
    ($target eq 'web' && ($ENV{'request.state'} ne 'construct')) ||
    ($target eq 'answer')
          ) {
         if ($status eq 'CAN_ANSWER') {
    $result.="</form></body>\n"; 
         } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {
    $result.="</body>\n";
         }
         $result.=&Apache::lonxml::xmlend();
       }
       if ($target eq 'grade') { 
         &Apache::lonhomework::showhash(%Apache::lonhomework::results);
         &finalize_storage();
       }
     } elsif ($target eq 'meta') {
       if ($Apache::inputtags::part eq '0') {
       $result=&Apache::response::mandatory_part_meta;        $result=&Apache::response::mandatory_part_meta;
     }      }
     } elsif ($target eq 'edit') {
       &Apache::lonxml::debug("in end_problem with $target, edit");
       $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
     } elsif ($target eq 'tex') {
         $result .= '\end{document}';
     }
     return $result;
   }
   
   sub start_library {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my ($result,$head_tag_start,$body_tag_start)=
       &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
     if ($target eq 'edit') {
       $result.=$head_tag_start."</head>".$body_tag_start.
         '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
          <input type="hidden" name="submitted" value="edit" />
          <input type="hidden" name="problemmode" value="Edit" />
          <input type="submit" name="problemmode" value="View" />
          <input type="submit" name="Undo" value="undo" /> <hr />
         ';
       my $temp=&Apache::edit::insertlist($target,$token);
       $result.=$temp;
       return $result;
     }
     if ($target eq 'modified') {
       $result=$token->[4];
       $result.=&Apache::edit::handle_insert();
       return $result;
     }
     return '';
   }
   
   sub end_library {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result='';
     if ($target eq 'edit') {
       $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
   }    }
   return $result;    return $result;
 }  }
   
 sub start_block {  sub start_block {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   
   my $code = @$parstack[$#$parstack];    if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
   $code =~ s/\"//g;      my $code = @$parstack[$#$parstack];
   $code .=';return $condition;';      $code =~ s/\"//g;
 #  print "<br>$code<br>";      $code .=';return $condition;';
   my $result = &Apache::run::run($code,$safeeval);      #  print "<br />$code<br />";
   if ( ! $result ) {       my $result = &Apache::run::run($code,$safeeval);
 #    my $skip=$$parser[$#$parser]->get_text("/block");      &Apache::lonxml::debug("block :$code: returned :$result:");
     my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);      if ( ! $result ) { 
 #    print "skipped $skip";        my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
         &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
       }
   }    }
   return "";    return "";
 }  }
   
 sub end_block {  sub end_block {
     return '';
 }  }
   
 sub start_while {  sub start_while {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   
   my $code = @$parstack[$#$parstack];    my $code = @$parstack[$#$parstack];
   $code =~ s/\"//g;    $code =~ s/\"//g;
Line 93  sub start_while { Line 419  sub start_while {
 }  }
   
 sub end_while {  sub end_while {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $code = pop @Apache::structuretags::whileconds;    my $code = pop @Apache::structuretags::whileconds;
   my $bodytext = pop @Apache::structuretags::whilebody;    my $bodytext = pop @Apache::structuretags::whilebody;
   my $result = &Apache::run::run($code,$safeeval);    my $result = &Apache::run::run($code,$safeeval);
Line 110  sub end_while { Line 436  sub end_while {
 #  ...   #  ... 
 # </randomlist>  # </randomlist>
 sub start_randomlist {  sub start_randomlist {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);    if ($target eq 'answer' || $target eq 'grade' || $target eq 'web') {
   my $b_parser= HTML::TokeParser->new(\$body);      my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
   my $b_tok;      my $b_parser= HTML::TokeParser->new(\$body);
   my @randomlist;      my $b_tok;
   my $list_item;      my @randomlist;
       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],$b_parser);
       $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";   $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
       push(@randomlist,$list_item);   push(@randomlist,$list_item);
    #  print "<BR><B>START-TAG $b_tok->[1], $b_tok->[4], $list_item</B>";   #  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
     }        }
     if($b_tok->[0] eq 'T') { # text        if($b_tok->[0] eq 'T') { # text
     # what to do with text in between tags?   # what to do with text in between tags?
       #  print "<B>TEXT $b_tok->[1]</B><BR>";   #  print "<b>TEXT $b_tok->[1]</b><br />";
     }        }
     # if($b_tok->[0] eq 'E') { # end tag, should not happen        # if($b_tok->[0] eq 'E') { # end tag, should not happen
       #  print "<B>END-TAG $b_tok->[1]</B><BR>";        #  print "<b>END-TAG $b_tok->[1]</b><br />";
     # }        # }
   }      }
   my @idx_arr = (0 .. $#randomlist);  
   &Apache::structuretags::shuffle(\@idx_arr);  
   my $bodytext = '';  
   for(0 .. $#randomlist) {  
     $bodytext .= "$randomlist[ $idx_arr[$_] ]";  
   }  
   
   &Apache::lonxml::newparser($parser,\$bodytext);      my @idx_arr = (0 .. $#randomlist);
       &Apache::structuretags::shuffle(\@idx_arr);
       my $bodytext = '';
       for(0 .. $#randomlist) {
         $bodytext .= "$randomlist[ $idx_arr[$_] ]";
       }
       &Apache::lonxml::newparser($parser,\$bodytext);
     }
   return "";    return "";
 }  }
   
 sub shuffle {  sub shuffle {
     my $a=shift;      my $a=shift;
     my $i;      my $i;
     for($i=@$a;--$i;) {      if (defined(@$a)) {
       my $j=int rand($i+1);        &Apache::response::setrandomnumber();
       next if $i == $j;        for($i=@$a;--$i;) {
       @$a[$i,$j] = @$a[$j,$i];   my $j=int rand($i+1);
    next if $i == $j;
    @$a[$i,$j] = @$a[$j,$i];
         }
     }      }
 }  }
   
 sub end_randomlist {  sub end_randomlist {
     return '';
 }  }
   
 sub start_part {  sub start_part {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   my $args ='';    my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
   if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }    if ($id eq '') { $id = $Apache::lonxml::curdepth; }
   my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);  
   $Apache::inputtags::part=$id;    $Apache::inputtags::part=$id;
     @Apache::inputtags::responselist = ();
     @Apache::inputtags::previous=();
   if ($target eq 'meta') {    if ($target eq 'meta') {
     return &Apache::response::mandatory_part_meta;      return &Apache::response::mandatory_part_meta;
     } elsif ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
       my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
       push (@Apache::inputtags::status,$status);
       my $expression='$external::datestatus="'.$status.'";';
       $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
       &Apache::run::run($expression,$safeeval);
       if ( $status eq 'CLOSED' ) {
         my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
         if ( $target eq "web" ) {
    return "<br />Part is not open to be viewed. It $accessmsg<br />";
         }
       }
   }    }
     return '';
 }  }
   
 sub end_part {  sub end_part {
   my ($target,$token,$parstack,$parser,$safeeval)=@_;    my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     &Apache::lonxml::debug("in end_part $target ");
     my $status=$Apache::inputtags::status['-1'];
     pop @Apache::inputtags::status;
     if ( $target eq 'meta' ) { return ''; }
     if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
       return &Apache::inputtags::grade;
     }
     if ($target eq 'web') {
       return &Apache::inputtags::gradestatus($Apache::inputtags::part);
     }
     return '';
   }
   
   sub start_preduedate {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
       if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
         &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
       }
     }
     return '';
   }
   
   sub end_preduedate {
     return '';
   }
   
   sub start_postanswerdate {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     if ($target eq 'web' || $target eq 'grade') {
       if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
         &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
       }
     }
     return '';
   }
   
   sub end_postanswerdate {
     return '';
   }
   
   sub start_notsolved {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
       my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
       &Apache::lonxml::debug("not solved has :$gradestatus:");
       if ($gradestatus =~ /^correct/) {
         &Apache::lonxml::debug("skipping");
         &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
       }
     }
     return '';
   }
   
   sub end_notsolved {
     return '';
   }
   
   sub start_solved {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
       my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
       if ($gradestatus !~ /^correct/) {
         &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
       }
     }
     return '';
   }
   
   sub end_solved {
     return '';
   }
   
   sub start_startouttext {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my @result=(''.'');
     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
     return (@result);
   }
   sub end_startouttext {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result='';
     my $text='';
   
     if ($target eq 'edit') {
       $text=&Apache::lonxml::get_all_text("endouttext",$$parser[-1]);
       $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
   <td>Delete:".
     &Apache::edit::deletelist($target,$token)
       ."</td>
   <td>".
     &Apache::edit::insertlist($target,$token).
       &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n".
         &Apache::edit::editfield($token->[1],$text,"",50,4);
     }
     if ($target eq 'modified') {
       $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
       $result='<startouttext />'.&Apache::edit::modifiedfield();
     }
     return $result;
   }
   sub start_endouttext {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result='';
     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
     if ($target eq "modified") { $result='<endouttext />'; }
     return $result;
   }
   sub end_endouttext {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my @result=('','');
     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
     return (@result);
   }
   sub delete_startouttext {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
   #  my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
     my $text=$$parser['-1']->get_text("/endouttext");
     my $ntoken=$$parser['-1']->get_token();
     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
     # Deleting 2 parallel tag pairs, but we need the numbers later to look like 
     # they did the last time round
     &Apache::lonxml::increasedepth($ntoken);
     &Apache::lonxml::decreasedepth($ntoken);
     return 1;
 }  }
   
 1;  1;
Removed from v.1.17  
changed lines
  Added in v.1.83

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