1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: # 2/19 Guy
4: package Apache::structuretags;
5:
6: use strict;
7: use Apache::lonnet;
8:
9: sub BEGIN {
10: &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
11: # &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))
12: }
13:
14: sub start_web {
15: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
16: my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
17: if ($target eq 'web') {
18: return $bodytext;
19: }
20: return '';
21: }
22:
23: sub end_web {
24: }
25:
26: sub start_tex {
27: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
28: my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
29: if ($target eq 'tex') {
30: return $bodytext
31: }
32: return '';
33: }
34:
35: sub end_tex {
36: }
37:
38: sub start_problem {
39: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
40:
41: #intialize globals
42: $Apache::inputtags::part='0';
43: @Apache::inputtags::responselist = ();
44:
45: #adeed vars to the scripting enviroment
46: my $expression='$external::part='.$Apache::inputtags::part.';';
47: &Apache::run::run($expression,$safeeval);
48: my $status;
49: my $datemsg;
50:
51: #should get back a <html> or the neccesary stuff to start XML/MathML
52: my $result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack,$parser,$safeeval);
53:
54: my $head_tag_start='<head>'.&Apache::lonxml::registerurl();
55: my $body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '.
56: 'onUnload="'.&Apache::lonxml::unloadevents().'" '.
57: 'bgcolor="#FFFFFF">';
58: if ($target eq 'web' || $target eq 'grade') {
59: ($status,$datemsg) = &Apache::lonhomework::check_date('0');
60: push (@Apache::inputtags::status,$status);
61: my $expression='$external::datestatus="'.$status.'";';
62: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
63: &Apache::run::run($expression,$safeeval);
64: if ( $status eq 'CLOSED' ) {
65: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
66: if ( $target eq "web" ) {
67: $result.= $head_tag_start.'</head>';
68: return $result . $body_tag_start .
69: " <br />Problem is not open to be viewed. The problem $datemsg<br />";
70: }
71: }
72: }
73: if ($target eq 'web') {
74: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
75: if ($name eq '') {
76: $name=&Apache::lonnet::EXT('resource.title');
77: if ($name eq 'con_lost') { $name = ''; }
78: }
79: $Apache::lonhomework::name=$name;
80: if ($status eq 'CAN_ANSWER') {
81: # create a page header and exit
82: $result.="$head_tag_start<title>$name</title></head>\n
83: $body_tag_start\n
84: <form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".
85: '<input type="hidden" name="submitted" value="yes" />';
86: if ($ENV{'request.state'} eq "construct") {
87: $result.='<input type="hidden" name="problemmode" value="View" />
88: <input type="submit" name="problemmode" value="Edit" /><hr />';
89: }
90: return $result;
91: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' || $status eq 'CLOSED') {
92: return $result.$head_tag_start."<title>$name</title></head>\n$body_tag_start\n";
93: }
94: }
95: if ($target eq 'edit') {
96: $result.=$head_tag_start."</head>".$body_tag_start.
97: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
98: <input type="hidden" name="submitted" value="edit" />
99: <input type="hidden" name="problemmode" value="Edit" />
100: <input type="submit" name="problemmode" value="View" />
101: <input type="submit" name="Undo" value="undo" /> <hr />
102: ';
103: my $temp=&Apache::edit::insertlist($target,$token);
104: $result.=$temp;
105: return $result;
106: }
107: if ($target eq 'modified') {
108: $result=$token->[4];
109: $result.=&Apache::edit::handle_insert();
110: return $result;
111: }
112: return '';
113: }
114:
115: sub end_problem {
116: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
117: my $result='';
118: my $status=$Apache::inputtags::status['-1'];
119: if ($target eq 'grade' || $target eq 'web' ) {
120: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
121: $status eq 'CAN_ANSWER') {
122: # if part is zero, no <part>s existed, so we need to the grading
123: &Apache::inputtags::grade;
124: } elsif ($Apache::inputtags::part eq '0') {
125: # if part is zero, no <part>s existed, so we need show the current
126: # grading status
127: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
128: }
129: if ($target eq 'web') {
130: if ($status eq 'CAN_ANSWER') {
131: $result.="</form></body>\n";
132: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {
133: $result.="</body>\n";
134: }
135: }
136: }
137: if ($target eq 'meta') {
138: if ($Apache::inputtags::part eq '0') {
139: $result=&Apache::response::mandatory_part_meta;
140: }
141: }
142: if ($target eq 'edit') {
143: &Apache::lonxml::debug("in end_problem with $target, edit");
144: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
145: }
146: return $result;
147: }
148:
149: sub start_block {
150: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
151:
152: if ($target eq 'web' || $target eq 'grade') {
153: my $code = @$parstack[$#$parstack];
154: $code =~ s/\"//g;
155: $code .=';return $condition;';
156: # print "<br />$code<br />";
157: my $result = &Apache::run::run($code,$safeeval);
158: &Apache::lonxml::debug("block :$code: returned :$result:");
159: if ( ! $result ) {
160: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
161: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
162: }
163: }
164: return "";
165: }
166:
167: sub end_block {
168: return '';
169: }
170:
171: sub start_while {
172: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
173:
174: my $code = @$parstack[$#$parstack];
175: $code =~ s/\"//g;
176: $code .=';return $condition;';
177:
178: push( @Apache::structuretags::whileconds, $code);
179: my $result = &Apache::run::run($code,$safeeval);
180: my $bodytext=$$parser[$#$parser]->get_text("/while");
181: push( @Apache::structuretags::whilebody, $bodytext);
182: if ( $result ) {
183: &Apache::lonxml::newparser($parser,\$bodytext);
184: }
185: return "";
186: }
187:
188: sub end_while {
189: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
190: my $code = pop @Apache::structuretags::whileconds;
191: my $bodytext = pop @Apache::structuretags::whilebody;
192: my $result = &Apache::run::run($code,$safeeval);
193: if ( $result ) {
194: &Apache::lonxml::newparser($parser,\$bodytext);
195: }
196: return "";
197: }
198:
199: # <randomlist>
200: # <tag1>..</tag1>
201: # <tag2>..</tag2>
202: # <tag3>..</tag3>
203: # ...
204: # </randomlist>
205: sub start_randomlist {
206: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
207: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
208: my $b_parser= HTML::TokeParser->new(\$body);
209: my $b_tok;
210: my @randomlist;
211: my $list_item;
212:
213: while($b_tok = $b_parser->get_token() ) {
214: if($b_tok->[0] eq 'S') { # start tag
215: # get content of the tag until matching end tag
216: # get all text upto the matching tag
217: # and push the content into @randomlist
218: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
219: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
220: push(@randomlist,$list_item);
221: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
222: }
223: if($b_tok->[0] eq 'T') { # text
224: # what to do with text in between tags?
225: # print "<b>TEXT $b_tok->[1]</b><br />";
226: }
227: # if($b_tok->[0] eq 'E') { # end tag, should not happen
228: # print "<b>END-TAG $b_tok->[1]</b><br />";
229: # }
230: }
231: my @idx_arr = (0 .. $#randomlist);
232: &Apache::structuretags::shuffle(\@idx_arr);
233: my $bodytext = '';
234: for(0 .. $#randomlist) {
235: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
236: }
237:
238: &Apache::lonxml::newparser($parser,\$bodytext);
239: return "";
240: }
241:
242: sub shuffle {
243: my $a=shift;
244: my $i;
245: for($i=@$a;--$i;) {
246: my $j=int rand($i+1);
247: next if $i == $j;
248: @$a[$i,$j] = @$a[$j,$i];
249: }
250: }
251:
252: sub end_randomlist {
253: }
254:
255: sub start_part {
256: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
257: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
258: $Apache::inputtags::part=$id;
259: @Apache::inputtags::responselist = ();
260: if ($target eq 'meta') {
261: return &Apache::response::mandatory_part_meta;
262: } elsif ($target eq 'web' || $target eq 'grade') {
263: my ($status,$datemsg) = &Apache::lonhomework::check_date("OPEN_DATE",$id);
264: push (@Apache::inputtags::status,$status);
265: my $expression='$external::datestatus="'.$status.'";';
266: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
267: &Apache::run::run($expression,$safeeval);
268: if ( $status eq 'CLOSED' ) {
269: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
270: if ( $target eq "web" ) {
271: return "<br />Part is not open to be viewed. It $datemsg<br />";
272: }
273: }
274: }
275: return '';
276: }
277:
278: sub end_part {
279: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
280: &Apache::lonxml::debug("in end_part $target ");
281: my $status=$Apache::inputtags::status['-1'];
282: pop @Apache::inputtags::status;
283: if ( $target eq 'meta' ) { return ''; }
284: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
285: return &Apache::inputtags::grade;
286: }
287: if ($target eq 'web') {
288: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
289: }
290: return '';
291: }
292:
293: sub start_preduedate {
294: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
295: if ($target eq 'web' || $target eq 'grade') {
296: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
297: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
298: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
299: }
300: }
301: return '';
302: }
303:
304: sub end_preduedate {
305: return '';
306: }
307:
308: sub start_postanswerdate {
309: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
310: if ($target eq 'web' || $target eq 'grade') {
311: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
312: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
313: }
314: }
315: return '';
316: }
317:
318: sub end_postanswerdate {
319: return '';
320: }
321:
322: sub start_notsolved {
323: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
324: if ($target eq 'web' || $target eq 'grade') {
325: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
326: &Apache::lonxml::debug("not solved has :$gradestatus:");
327: if ($gradestatus =~ /^correct/) {
328: &Apache::lonxml::debug("skipping");
329: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
330: }
331: }
332: return '';
333: }
334:
335: sub end_notsolved {
336: return '';
337: }
338:
339: sub start_solved {
340: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
341: if ($target eq 'web' || $target eq 'grade') {
342: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
343: if ($gradestatus !~ /^correct/) {
344: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
345: }
346: }
347: return '';
348: }
349:
350: sub end_solved {
351: return '';
352: }
353:
354: sub start_startouttext {
355: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
356: my @result=(''.'');
357: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
358: return (@result);
359: }
360: sub end_startouttext {
361: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
362: my $result='';
363: my $text='';
364:
365: if ($target eq 'edit') {
366: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[$#$parser]);
367: $result=
368: &Apache::edit::tag_start($target,$token).
369: &Apache::edit::editfield($token->[1],$text,"Text Block",50,5);
370: }
371: if ($target eq 'modified') {
372: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
373: $result='<startouttext />'.&Apache::edit::modifiedfield();
374: }
375: return $result;
376: }
377: sub start_endouttext {
378: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
379: my $result='';
380: if ($target eq "edit" ) { $result=&Apache::edit::tag_end($target,$token); }
381: if ($target eq "modified") { $result='<endouttext />'; }
382: return $result;
383: }
384: sub end_endouttext {
385: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
386: my @result=('','');
387: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
388: return (@result);
389: }
390:
391:
392: 1;
393: __END__
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