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Annotation of loncom/homework/structuretags.pm, revision 1.6

1.6     ! tsai        1: # The LearningOnline Network with CAPA # <script> definiton
1.1       albertel    2: 
                      3: package Apache::structuretags; 
                      4: 
                      5: use strict;
                      6: use Apache::lonnet;
                      7: 
                      8: sub BEGIN {
1.6     ! tsai        9:   &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist'));
1.1       albertel   10: }
                     11: 
                     12: sub start_block {
                     13:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
                     14: 
                     15:   my $code = @$parstack[$#$parstack];
                     16:   $code =~ s/\"//g;
                     17:   $code .=';return $condition;';
1.3       albertel   18: #  print "<br>$code<br>";
1.1       albertel   19:   my $result = &Apache::run::run($code,$safeeval);
                     20:   if ( ! $result ) { 
1.3       albertel   21: #    my $skip=$$parser[$#$parser]->get_text("/block");
                     22:     my $skip=&Apache::lonxml::get_all_text("block",$$parser[$#$parser]);
                     23: #    print "skipped $skip";
1.1       albertel   24:   }
                     25:   return "";
                     26: }
                     27: 
                     28: sub end_block {
1.4       tsai       29: }
                     30: 
                     31: sub start_while {
                     32:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
                     33: 
                     34:   my $code = @$parstack[$#$parstack];
                     35:   $code =~ s/\"//g;
                     36:   $code .=';return $condition;';
                     37: 
1.5       tsai       38:   push( @Apache::structuretags::whileconds, $code); 
1.4       tsai       39:   my $result = &Apache::run::run($code,$safeeval);
                     40:   my $bodytext=$$parser[$#$parser]->get_text("/while");
1.5       tsai       41:   push( @Apache::structuretags::whilebody, $bodytext);
                     42:   if ( $result ) { 
1.4       tsai       43:      my $tempparser=HTML::TokeParser->new(\$bodytext);
                     44:      push (@$parser,$tempparser);
                     45:   }
                     46:   return "";
                     47: }
                     48: 
                     49: sub end_while {
1.5       tsai       50:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
                     51:   my $code = pop @Apache::structuretags::whileconds;
                     52:   my $bodytext = pop @Apache::structuretags::whilebody;
                     53:   my $result = &Apache::run::run($code,$safeeval);
                     54:   if ( $result ) { 
                     55:      my $tempparser=HTML::TokeParser->new(\$bodytext);
                     56:      push (@$parser,$tempparser);
                     57:   } 
                     58:   return "";
1.1       albertel   59: }
1.6     ! tsai       60: 
        !            61: # <randomlist> 
        !            62: #  <tag1>..</tag1>
        !            63: #  <tag2>..</tag2>
        !            64: #  <tag3>..</tag3>
        !            65: #  ... 
        !            66: # </randomlist>
        !            67: sub start_randomlist {
        !            68:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
        !            69:   my $body= &Apache::lonxml::get_all_text("randomlist",$$parser[$#$parser]);
        !            70:   my $b_parser= HTML::TokeParser->new(\$body);
        !            71:   my $b_tok;
        !            72:   my @randomlist;
        !            73:   my $list_item;
        !            74:   my $param;
        !            75: 
        !            76:   while($b_tok = $b_parser->get_token() ) {
        !            77:     if($b_tok->[0] eq 'S') { # start tag
        !            78:     # get content of the tag until matching end tag
        !            79:     # get all text upto the matching tag
        !            80:     # and push the content into @randomlist
        !            81:       $list_item = &Apache::lonxml::get_all_text($b_tok->[1],$b_parser);
        !            82:       $param='';
        !            83:       map {$param .= "$_=\"$b_tok->[2]->{$_}\" "} @{$b_tok->[3]};
        !            84:       $param=~ s/^\s*(\S+)\s*$/$1/;
        !            85:       $param= " $param" if $param ne "";
        !            86:       $list_item = "<$b_tok->[1]"."$param>"."$list_item"."</$b_tok->[1]>";
        !            87:       print "<B>START-TAG $b_tok->[1], $list_item</B><BR>";
        !            88:       push(@randomlist,$list_item);
        !            89:     }
        !            90:     if($b_tok->[0] eq 'T') { # text
        !            91:     # what to do with text in between tags?
        !            92:       #  print "<B>TEXT $b_tok->[1]</B><BR>";
        !            93:     }
        !            94:     # if($b_tok->[0] eq 'E') { # end tag, should not happen
        !            95:       #  print "<B>END-TAG $b_tok->[1]</B><BR>";
        !            96:     # }
        !            97:   }
        !            98:   # randomly select one item from the array @randomlist 
        !            99:   # and created a new parser for it and push it onto the
        !           100:   # parser stack
        !           101:   my $bodytext = $randomlist[int(rand($#randomlist - 1)) + 1];
        !           102:   my $tempparser=HTML::TokeParser->new(\$bodytext);
        !           103:   print "SELECT-BODY<B>$bodytext</B><BR>";
        !           104:   push (@$parser,$tempparser);
        !           105:   return "";
        !           106: }
        !           107: 
        !           108: sub end_randomlist {
        !           109: }
        !           110: 
1.1       albertel  111: 
                    112: 1;
                    113: __END__