Annotation of loncom/homework/structuretags.pm, revision 1.19
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",$$parser[$#$parser]);
1.19 ! albertel 15: if ($target eq 'web') {
! 16: return $bodytext;
! 17: }
! 18: return '';
1.10 albertel 19: }
20:
21: sub end_web {
22: }
23:
24: sub start_tex {
25: my ($target,$token,$parstack,$parser,$safeeval)=@_;
26: my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
1.19 ! albertel 27: if ($target eq 'tex') {
! 28: return $bodytext
! 29: }
1.10 albertel 30: return '';
31: }
32:
33: sub end_tex {
1.9 albertel 34: }
35:
36: sub start_problem {
37: my ($target,$token,$parstack,$parser,$safeeval)=@_;
1.19 ! albertel 38:
! 39: #intialize globals
! 40: $Apache::inputtags::part='0';
! 41: @Apache::inputtags::responselist = ();
! 42:
! 43: #adeed vars to the scripting enviroment
! 44: my $expression='$external::part='.$Apache::inputtags::part.';';
! 45: &Apache::run::run($expression,$safeeval);
! 46:
! 47: if ($target eq 'web') {
! 48: # create a page header and exit
1.16 albertel 49: my $args ='';
1.19 ! albertel 50: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
1.16 albertel 51: my $name = &Apache::run::run("{$args;".'return $name}',$safeeval);
52: return "<title>$name</title>\n<body bgcolor=#FFFFFF>\n<form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">";
53: }
1.19 ! albertel 54: return '';
1.9 albertel 55: }
56:
57: sub end_problem {
1.16 albertel 58: my ($target,$token,$parstack,$parser,$safeeval)=@_;
59: my $result='';
60: unless ($target eq 'meta') {
1.19 ! albertel 61: if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
! 62: # if part is zero, no <part>s existed, so we need to the grading
! 63: &Apache::inputtags::grade;
! 64: } elsif ($Apache::inputtags::part eq '0') {
! 65: # if part is zero, no <part>s existed, so we need show the current
! 66: # grading status
! 67: $result.= &Apache::inputtags::gradestatus;
! 68: }
! 69: if ($target eq 'web') { $result.="</form></body>\n"; }
1.16 albertel 70: } else {
1.18 albertel 71: if ($Apache::inputtags::part eq '0') {
1.16 albertel 72: $result=&Apache::response::mandatory_part_meta;
73: }
74: }
75: return $result;
1.1 albertel 76: }
77:
78: sub start_block {
79: my ($target,$token,$parstack,$parser,$safeeval)=@_;
80:
81: my $code = @$parstack[$#$parstack];
82: $code =~ s/\"//g;
83: $code .=';return $condition;';
1.3 albertel 84: # print "<br>$code<br>";
1.1 albertel 85: my $result = &Apache::run::run($code,$safeeval);
86: if ( ! $result ) {
1.3 albertel 87: # my $skip=$$parser[$#$parser]->get_text("/block");
1.9 albertel 88: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
1.3 albertel 89: # print "skipped $skip";
1.1 albertel 90: }
91: return "";
92: }
93:
94: sub end_block {
1.4 tsai 95: }
96:
97: sub start_while {
98: my ($target,$token,$parstack,$parser,$safeeval)=@_;
99:
100: my $code = @$parstack[$#$parstack];
101: $code =~ s/\"//g;
102: $code .=';return $condition;';
103:
1.5 tsai 104: push( @Apache::structuretags::whileconds, $code);
1.4 tsai 105: my $result = &Apache::run::run($code,$safeeval);
106: my $bodytext=$$parser[$#$parser]->get_text("/while");
1.5 tsai 107: push( @Apache::structuretags::whilebody, $bodytext);
108: if ( $result ) {
1.8 albertel 109: &Apache::lonxml::newparser($parser,\$bodytext);
1.4 tsai 110: }
111: return "";
112: }
113:
114: sub end_while {
1.5 tsai 115: my ($target,$token,$parstack,$parser,$safeeval)=@_;
116: my $code = pop @Apache::structuretags::whileconds;
117: my $bodytext = pop @Apache::structuretags::whilebody;
118: my $result = &Apache::run::run($code,$safeeval);
119: if ( $result ) {
1.8 albertel 120: &Apache::lonxml::newparser($parser,\$bodytext);
1.5 tsai 121: }
122: return "";
1.1 albertel 123: }
1.6 tsai 124:
125: # <randomlist>
126: # <tag1>..</tag1>
127: # <tag2>..</tag2>
128: # <tag3>..</tag3>
129: # ...
130: # </randomlist>
131: sub start_randomlist {
132: my ($target,$token,$parstack,$parser,$safeeval)=@_;
1.9 albertel 133: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
1.6 tsai 134: my $b_parser= HTML::TokeParser->new(\$body);
135: my $b_tok;
136: my @randomlist;
137: my $list_item;
138:
139: while($b_tok = $b_parser->get_token() ) {
140: if($b_tok->[0] eq 'S') { # start tag
141: # get content of the tag until matching end tag
142: # get all text upto the matching tag
143: # and push the content into @randomlist
1.9 albertel 144: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
1.7 tsai 145: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
1.6 tsai 146: push(@randomlist,$list_item);
1.7 tsai 147: # print "<BR><B>START-TAG $b_tok->[1], $b_tok->[4], $list_item</B>";
1.6 tsai 148: }
149: if($b_tok->[0] eq 'T') { # text
150: # what to do with text in between tags?
151: # print "<B>TEXT $b_tok->[1]</B><BR>";
152: }
153: # if($b_tok->[0] eq 'E') { # end tag, should not happen
154: # print "<B>END-TAG $b_tok->[1]</B><BR>";
155: # }
156: }
1.7 tsai 157: my @idx_arr = (0 .. $#randomlist);
158: &Apache::structuretags::shuffle(\@idx_arr);
159: my $bodytext = '';
160: for(0 .. $#randomlist) {
161: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
162: }
1.8 albertel 163:
164: &Apache::lonxml::newparser($parser,\$bodytext);
1.6 tsai 165: return "";
1.7 tsai 166: }
167:
168: sub shuffle {
169: my $a=shift;
170: my $i;
171: for($i=@$a;--$i;) {
172: my $j=int rand($i+1);
173: next if $i == $j;
174: @$a[$i,$j] = @$a[$j,$i];
175: }
1.6 tsai 176: }
177:
178: sub end_randomlist {
179: }
180:
1.11 albertel 181: sub start_part {
182: my ($target,$token,$parstack,$parser,$safeeval)=@_;
183: my $args ='';
184: if ( $#$parstack > -1 ) { $args=$$parstack[$#$parstack]; }
185: my $id = &Apache::run::run("{$args;".'return $id}',$safeeval);
1.14 albertel 186: $Apache::inputtags::part=$id;
1.18 albertel 187: @Apache::inputtags::responselist = ();
1.15 www 188: if ($target eq 'meta') {
1.16 albertel 189: return &Apache::response::mandatory_part_meta;
1.15 www 190: }
1.19 ! albertel 191: return '';
1.11 albertel 192: }
193:
194: sub end_part {
195: my ($target,$token,$parstack,$parser,$safeeval)=@_;
1.18 albertel 196: &Apache::lonxml::debug("in end_part $target ");
1.19 ! albertel 197: if ( $target eq 'meta' ) { return ''; }
! 198: if ( $target eq 'grade' ) { return &Apaceh::inputtags::grade; }
! 199: return &Apache::inputtags::gradestatus;
1.11 albertel 200: }
1.1 albertel 201:
202: 1;
203: __END__
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