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