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'));
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 $condition;';
18: # print "<br>$code<br>";
19: my $result = &Apache::run::run($code,$safeeval);
20: if ( ! $result ) {
21: # my $skip=$$parser[$#$parser]->get_text("/block");
22: my $skip=&Apache::lonxml::get_all_text("block",$$parser[$#$parser]);
23: # print "skipped $skip";
24: }
25: return "";
26: }
27:
28: sub end_block {
29: }
30:
31: sub start_while {
32: my ($target,$token,$parstack,$parser,$safeeval)=@_;
33:
34: my $code = @$parstack[$#$parstack];
35: $code =~ s/\"//g;
36: $code .=';return $condition;';
37:
38: push( @Apache::structuretags::whileconds, $code);
39: my $result = &Apache::run::run($code,$safeeval);
40: my $bodytext=$$parser[$#$parser]->get_text("/while");
41: push( @Apache::structuretags::whilebody, $bodytext);
42: if ( $result ) {
43: my $tempparser=HTML::TokeParser->new(\$bodytext);
44: push (@$parser,$tempparser);
45: }
46: return "";
47: }
48:
49: sub end_while {
50: my ($target,$token,$parstack,$parser,$safeeval)=@_;
51: my $code = pop @Apache::structuretags::whileconds;
52: my $bodytext = pop @Apache::structuretags::whilebody;
53: my $result = &Apache::run::run($code,$safeeval);
54: if ( $result ) {
55: my $tempparser=HTML::TokeParser->new(\$bodytext);
56: push (@$parser,$tempparser);
57: }
58: return "";
59: }
60:
61: # <randomlist>
62: # <tag1>..</tag1>
63: # <tag2>..</tag2>
64: # <tag3>..</tag3>
65: # ...
66: # </randomlist>
67: sub start_randomlist {
68: my ($target,$token,$parstack,$parser,$safeeval)=@_;
69: my $body= &Apache::lonxml::get_all_text("randomlist",$$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:
111:
112: 1;
113: __END__
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