Annotation of loncom/homework/structuretags.pm, revision 1.14

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 {
1.11      albertel    9:   &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','web','tex','part'));
1.10      albertel   10: }
                     11: 
                     12: sub start_web {
                     13:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
                     14:   my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
                     15:   return $bodytext;
                     16: }
                     17: 
                     18: sub end_web {
                     19: }
                     20: 
                     21: sub start_tex {
                     22:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
                     23:   my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
                     24:   return '';
                     25: }
                     26: 
                     27: sub end_tex {
1.9       albertel   28: }
                     29: 
                     30: sub start_problem {
                     31:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
                     32:   my $args ='';
                     33:   if ( $#$parstack > -1 ) {
                     34:     $args=$$parstack[$#$parstack];
                     35:   }
                     36:   my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);
1.14    ! albertel   37:   $Apache::inputtags::part='0';
        !            38:   my $expression='$external::part='.$Apache::inputtags::part.';';
1.12      albertel   39:   $safeeval->share_from('Apache::inputtags',['@part']);
1.14    ! albertel   40:   &Apache::run::run($expression)
1.11      albertel   41:   return "<title>$name</title>\n<body bgcolor=#FFFFFF>\n<form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">";
1.9       albertel   42: }
                     43: 
                     44: sub end_problem {
1.11      albertel   45:   return "</form></body>\n";
1.1       albertel   46: }
                     47: 
                     48: sub start_block {
                     49:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
                     50: 
                     51:   my $code = @$parstack[$#$parstack];
                     52:   $code =~ s/\"//g;
                     53:   $code .=';return $condition;';
1.3       albertel   54: #  print "<br>$code<br>";
1.1       albertel   55:   my $result = &Apache::run::run($code,$safeeval);
                     56:   if ( ! $result ) { 
1.3       albertel   57: #    my $skip=$$parser[$#$parser]->get_text("/block");
1.9       albertel   58:     my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
1.3       albertel   59: #    print "skipped $skip";
1.1       albertel   60:   }
                     61:   return "";
                     62: }
                     63: 
                     64: sub end_block {
1.4       tsai       65: }
                     66: 
                     67: sub start_while {
                     68:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
                     69: 
                     70:   my $code = @$parstack[$#$parstack];
                     71:   $code =~ s/\"//g;
                     72:   $code .=';return $condition;';
                     73: 
1.5       tsai       74:   push( @Apache::structuretags::whileconds, $code); 
1.4       tsai       75:   my $result = &Apache::run::run($code,$safeeval);
                     76:   my $bodytext=$$parser[$#$parser]->get_text("/while");
1.5       tsai       77:   push( @Apache::structuretags::whilebody, $bodytext);
                     78:   if ( $result ) { 
1.8       albertel   79:     &Apache::lonxml::newparser($parser,\$bodytext);
1.4       tsai       80:   }
                     81:   return "";
                     82: }
                     83: 
                     84: sub end_while {
1.5       tsai       85:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
                     86:   my $code = pop @Apache::structuretags::whileconds;
                     87:   my $bodytext = pop @Apache::structuretags::whilebody;
                     88:   my $result = &Apache::run::run($code,$safeeval);
                     89:   if ( $result ) { 
1.8       albertel   90:     &Apache::lonxml::newparser($parser,\$bodytext);
1.5       tsai       91:   } 
                     92:   return "";
1.1       albertel   93: }
1.6       tsai       94: 
                     95: # <randomlist> 
                     96: #  <tag1>..</tag1>
                     97: #  <tag2>..</tag2>
                     98: #  <tag3>..</tag3>
                     99: #  ... 
                    100: # </randomlist>
                    101: sub start_randomlist {
                    102:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
1.9       albertel  103:   my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
1.6       tsai      104:   my $b_parser= HTML::TokeParser->new(\$body);
                    105:   my $b_tok;
                    106:   my @randomlist;
                    107:   my $list_item;
                    108: 
                    109:   while($b_tok = $b_parser->get_token() ) {
                    110:     if($b_tok->[0] eq 'S') { # start tag
                    111:     # get content of the tag until matching end tag
                    112:     # get all text upto the matching tag
                    113:     # and push the content into @randomlist
1.9       albertel  114:       $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
1.7       tsai      115:       $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
1.6       tsai      116:       push(@randomlist,$list_item);
1.7       tsai      117:    #  print "<BR><B>START-TAG $b_tok->[1], $b_tok->[4], $list_item</B>";
1.6       tsai      118:     }
                    119:     if($b_tok->[0] eq 'T') { # text
                    120:     # what to do with text in between tags?
                    121:       #  print "<B>TEXT $b_tok->[1]</B><BR>";
                    122:     }
                    123:     # if($b_tok->[0] eq 'E') { # end tag, should not happen
                    124:       #  print "<B>END-TAG $b_tok->[1]</B><BR>";
                    125:     # }
                    126:   }
1.7       tsai      127:   my @idx_arr = (0 .. $#randomlist);
                    128:   &Apache::structuretags::shuffle(\@idx_arr);
                    129:   my $bodytext = '';
                    130:   for(0 .. $#randomlist) {
                    131:     $bodytext .= "$randomlist[ $idx_arr[$_] ]";
                    132:   }
1.8       albertel  133: 
                    134:   &Apache::lonxml::newparser($parser,\$bodytext);
1.6       tsai      135:   return "";
1.7       tsai      136: }
                    137: 
                    138: sub shuffle {
                    139:     my $a=shift;
                    140:     my $i;
                    141:     for($i=@$a;--$i;) {
                    142:       my $j=int rand($i+1);
                    143:       next if $i == $j;
                    144:       @$a[$i,$j] = @$a[$j,$i];
                    145:     }
1.6       tsai      146: }
                    147: 
                    148: sub end_randomlist {
                    149: }
                    150: 
1.11      albertel  151: sub start_part {
                    152:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
                    153:   my $args ='';
                    154:   if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
                    155:   my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);
1.14    ! albertel  156:   $Apache::inputtags::part=$id;
1.11      albertel  157: }
                    158: 
                    159: sub end_part {
                    160:   my ($target,$token,$parstack,$parser,$safeeval)=@_;
1.14    ! albertel  161:   $Apache::inputtags::part='0';
1.11      albertel  162: }
1.1       albertel  163: 
                    164: 1;
                    165: __END__

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