# The LearningOnline Network with CAPA # <script> definiton
package Apache::structuretags;
use strict;
use Apache::lonnet;
sub BEGIN {
&Apache::lonxml::register('Apache::structuretags',('block','while','randomlist'));
}
sub start_block {
my ($target,$token,$parstack,$parser,$safeeval)=@_;
my $code = @$parstack[$#$parstack];
$code =~ s/\"//g;
$code .=';return $condition;';
# print "<br>$code<br>";
my $result = &Apache::run::run($code,$safeeval);
if ( ! $result ) {
# my $skip=$$parser[$#$parser]->get_text("/block");
my $skip=&Apache::lonxml::get_all_text("block",$$parser[$#$parser]);
# print "skipped $skip";
}
return "";
}
sub end_block {
}
sub start_while {
my ($target,$token,$parstack,$parser,$safeeval)=@_;
my $code = @$parstack[$#$parstack];
$code =~ s/\"//g;
$code .=';return $condition;';
push( @Apache::structuretags::whileconds, $code);
my $result = &Apache::run::run($code,$safeeval);
my $bodytext=$$parser[$#$parser]->get_text("/while");
push( @Apache::structuretags::whilebody, $bodytext);
if ( $result ) {
my $tempparser=HTML::TokeParser->new(\$bodytext);
push (@$parser,$tempparser);
}
return "";
}
sub end_while {
my ($target,$token,$parstack,$parser,$safeeval)=@_;
my $code = pop @Apache::structuretags::whileconds;
my $bodytext = pop @Apache::structuretags::whilebody;
my $result = &Apache::run::run($code,$safeeval);
if ( $result ) {
my $tempparser=HTML::TokeParser->new(\$bodytext);
push (@$parser,$tempparser);
}
return "";
}
# <randomlist>
# <tag1>..</tag1>
# <tag2>..</tag2>
# <tag3>..</tag3>
# ...
# </randomlist>
sub start_randomlist {
my ($target,$token,$parstack,$parser,$safeeval)=@_;
my $body= &Apache::lonxml::get_all_text("randomlist",$$parser[$#$parser]);
my $b_parser= HTML::TokeParser->new(\$body);
my $b_tok;
my @randomlist;
my $list_item;
my $param;
while($b_tok = $b_parser->get_token() ) {
if($b_tok->[0] eq 'S') { # start tag
# get content of the tag until matching end tag
# get all text upto the matching tag
# and push the content into @randomlist
$list_item = &Apache::lonxml::get_all_text($b_tok->[1],$b_parser);
$param='';
map {$param .= "$_=\"$b_tok->[2]->{$_}\" "} @{$b_tok->[3]};
$param=~ s/^\s*(\S+)\s*$/$1/;
$param= " $param" if $param ne "";
$list_item = "<$b_tok->[1]"."$param>"."$list_item"."</$b_tok->[1]>";
print "<B>START-TAG $b_tok->[1], $list_item</B><BR>";
push(@randomlist,$list_item);
}
if($b_tok->[0] eq 'T') { # text
# what to do with text in between tags?
# print "<B>TEXT $b_tok->[1]</B><BR>";
}
# if($b_tok->[0] eq 'E') { # end tag, should not happen
# print "<B>END-TAG $b_tok->[1]</B><BR>";
# }
}
# randomly select one item from the array @randomlist
# and created a new parser for it and push it onto the
# parser stack
my $bodytext = $randomlist[int(rand($#randomlist - 1)) + 1];
my $tempparser=HTML::TokeParser->new(\$bodytext);
print "SELECT-BODY<B>$bodytext</B><BR>";
push (@$parser,$tempparser);
return "";
}
sub end_randomlist {
}
1;
__END__
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>