[BACK]Return to structuretags.pm CVS log [TXT] [DIR] Up to [LON-CAPA] / loncom / homework
File:  [LON-CAPA] / loncom / homework / structuretags.pm
Revision 1.10: download - view: text, annotated - select for diffs
Thu Oct 12 20:36:05 2000 UTC (23 years, 7 months ago) by albertel
Branches: MAIN
CVS tags: HEAD
- implemented a simple &tex() &web()
- implemented a broken <tex> <outtext> and <web>

    1: # The LearningOnline Network with CAPA # <script> definiton
    2: 
    3: package Apache::structuretags; 
    4: 
    5: use strict;
    6: use Apache::lonnet;
    7: 
    8: sub BEGIN {
    9:   &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','outtext','web','tex'));
   10: }
   11: 
   12: sub start_outtext {
   13: }
   14: 
   15: sub end_outtext {
   16: }
   17: 
   18: sub start_web {
   19:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
   20:   my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
   21:   return $bodytext;
   22: }
   23: 
   24: sub end_web {
   25: }
   26: 
   27: sub start_tex {
   28:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
   29:   my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
   30:   return '';
   31: }
   32: 
   33: sub end_tex {
   34: }
   35: 
   36: sub start_problem {
   37:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
   38:   my $args ='';
   39:   if ( $#$parstack > -1 ) {
   40:     $args=$$parstack[$#$parstack];
   41:   }
   42:   my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);
   43:   return "<title>$name</title>\n<body bgcolor=#FFFFFF>\n"
   44: }
   45: 
   46: sub end_problem {
   47:   return "</body>\n";
   48: }
   49: 
   50: sub start_block {
   51:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
   52: 
   53:   my $code = @$parstack[$#$parstack];
   54:   $code =~ s/\"//g;
   55:   $code .=';return $condition;';
   56: #  print "<br>$code<br>";
   57:   my $result = &Apache::run::run($code,$safeeval);
   58:   if ( ! $result ) { 
   59: #    my $skip=$$parser[$#$parser]->get_text("/block");
   60:     my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
   61: #    print "skipped $skip";
   62:   }
   63:   return "";
   64: }
   65: 
   66: sub end_block {
   67: }
   68: 
   69: sub start_while {
   70:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
   71: 
   72:   my $code = @$parstack[$#$parstack];
   73:   $code =~ s/\"//g;
   74:   $code .=';return $condition;';
   75: 
   76:   push( @Apache::structuretags::whileconds, $code); 
   77:   my $result = &Apache::run::run($code,$safeeval);
   78:   my $bodytext=$$parser[$#$parser]->get_text("/while");
   79:   push( @Apache::structuretags::whilebody, $bodytext);
   80:   if ( $result ) { 
   81:     &Apache::lonxml::newparser($parser,\$bodytext);
   82:   }
   83:   return "";
   84: }
   85: 
   86: sub end_while {
   87:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
   88:   my $code = pop @Apache::structuretags::whileconds;
   89:   my $bodytext = pop @Apache::structuretags::whilebody;
   90:   my $result = &Apache::run::run($code,$safeeval);
   91:   if ( $result ) { 
   92:     &Apache::lonxml::newparser($parser,\$bodytext);
   93:   } 
   94:   return "";
   95: }
   96: 
   97: # <randomlist> 
   98: #  <tag1>..</tag1>
   99: #  <tag2>..</tag2>
  100: #  <tag3>..</tag3>
  101: #  ... 
  102: # </randomlist>
  103: sub start_randomlist {
  104:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
  105:   my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
  106:   my $b_parser= HTML::TokeParser->new(\$body);
  107:   my $b_tok;
  108:   my @randomlist;
  109:   my $list_item;
  110: 
  111:   while($b_tok = $b_parser->get_token() ) {
  112:     if($b_tok->[0] eq 'S') { # start tag
  113:     # get content of the tag until matching end tag
  114:     # get all text upto the matching tag
  115:     # and push the content into @randomlist
  116:       $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
  117:       $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
  118:       push(@randomlist,$list_item);
  119:    #  print "<BR><B>START-TAG $b_tok->[1], $b_tok->[4], $list_item</B>";
  120:     }
  121:     if($b_tok->[0] eq 'T') { # text
  122:     # what to do with text in between tags?
  123:       #  print "<B>TEXT $b_tok->[1]</B><BR>";
  124:     }
  125:     # if($b_tok->[0] eq 'E') { # end tag, should not happen
  126:       #  print "<B>END-TAG $b_tok->[1]</B><BR>";
  127:     # }
  128:   }
  129:   my @idx_arr = (0 .. $#randomlist);
  130:   &Apache::structuretags::shuffle(\@idx_arr);
  131:   my $bodytext = '';
  132:   for(0 .. $#randomlist) {
  133:     $bodytext .= "$randomlist[ $idx_arr[$_] ]";
  134:   }
  135: 
  136:   &Apache::lonxml::newparser($parser,\$bodytext);
  137:   return "";
  138: }
  139: 
  140: sub shuffle {
  141:     my $a=shift;
  142:     my $i;
  143:     for($i=@$a;--$i;) {
  144:       my $j=int rand($i+1);
  145:       next if $i == $j;
  146:       @$a[$i,$j] = @$a[$j,$i];
  147:     }
  148: }
  149: 
  150: sub end_randomlist {
  151: }
  152: 
  153: 
  154: 1;
  155: __END__
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>