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: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
45: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
46: if ($Apache::lonhomework::type eq '') {
47: $Apache::lonhomework::type='homework';
48: }
49: #adeed vars to the scripting enviroment
50: my $expression='$external::part='.$Apache::inputtags::part.';';
51: &Apache::run::run($expression,$safeeval);
52: my $status;
53: my $datemsg;
54:
55: #should get back a <html> or the neccesary stuff to start XML/MathML
56: my $result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack,$parser,$safeeval);
57:
58: my $head_tag_start='<head>'.&Apache::lonxml::registerurl();
59: my $body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '.
60: 'onUnload="'.&Apache::lonxml::unloadevents().'" '.
61: 'bgcolor="#FFFFFF">';
62: if ($target eq 'web' || $target eq 'grade') {
63: ($status,$datemsg) = &Apache::lonhomework::check_date('0');
64: push (@Apache::inputtags::status,$status);
65: my $expression='$external::datestatus="'.$status.'";';
66: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
67: &Apache::run::run($expression,$safeeval);
68: if ( $status eq 'CLOSED' ) {
69: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
70: if ( $target eq "web" ) {
71: $result.= $head_tag_start.'</head>';
72: return $result . $body_tag_start .
73: " <br />Problem is not open to be viewed. The problem $datemsg<br />";
74: }
75: }
76: }
77: if ($target eq 'web') {
78: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
79: if ($name eq '') {
80: $name=&Apache::lonnet::EXT('resource.title');
81: if ($name eq 'con_lost') { $name = ''; }
82: }
83: $Apache::lonhomework::name=$name;
84: if ($status eq 'CAN_ANSWER') {
85: # create a page header and exit
86: $result.="$head_tag_start<title>$name</title></head>\n
87: $body_tag_start\n
88: <form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".
89: '<input type="hidden" name="submitted" value="yes" />';
90: if ($ENV{'request.state'} eq "construct") {
91: $result.='<input type="hidden" name="problemmode" value="View" />
92: <input type="submit" name="problemmode" value="Edit" /><hr />';
93: }
94: return $result;
95: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' || $status eq 'CLOSED') {
96: return $result.$head_tag_start."<title>$name</title></head>\n$body_tag_start\n";
97: }
98: }
99: if ($target eq 'edit') {
100: $result.=$head_tag_start."</head>".$body_tag_start.
101: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
102: <input type="hidden" name="submitted" value="edit" />
103: <input type="hidden" name="problemmode" value="Edit" />
104: <input type="submit" name="problemmode" value="View" />
105: <input type="submit" name="Undo" value="undo" /> <hr />
106: ';
107: my $temp=&Apache::edit::insertlist($target,$token);
108: $result.=$temp;
109: return $result;
110: }
111: if ($target eq 'modified') {
112: $result=$token->[4];
113: $result.=&Apache::edit::handle_insert();
114: return $result;
115: }
116: return '';
117: }
118:
119: sub end_problem {
120: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
121: my $result='';
122: my $status=$Apache::inputtags::status['-1'];
123: if ($target eq 'grade' || $target eq 'web' ) {
124: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
125: $status eq 'CAN_ANSWER') {
126: # if part is zero, no <part>s existed, so we need to the grading
127: &Apache::inputtags::grade;
128: } elsif ($Apache::inputtags::part eq '0') {
129: # if part is zero, no <part>s existed, so we need show the current
130: # grading status
131: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
132: }
133: if ($target eq 'web') {
134: if ($status eq 'CAN_ANSWER') {
135: $result.="</form></body>\n";
136: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {
137: $result.="</body>\n";
138: }
139: }
140: }
141: if ($target eq 'meta') {
142: if ($Apache::inputtags::part eq '0') {
143: $result=&Apache::response::mandatory_part_meta;
144: }
145: }
146: if ($target eq 'edit') {
147: &Apache::lonxml::debug("in end_problem with $target, edit");
148: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
149: }
150: return $result;
151: }
152:
153: sub start_block {
154: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
155:
156: if ($target eq 'web' || $target eq 'grade') {
157: my $code = @$parstack[$#$parstack];
158: $code =~ s/\"//g;
159: $code .=';return $condition;';
160: # print "<br />$code<br />";
161: my $result = &Apache::run::run($code,$safeeval);
162: &Apache::lonxml::debug("block :$code: returned :$result:");
163: if ( ! $result ) {
164: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
165: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
166: }
167: }
168: return "";
169: }
170:
171: sub end_block {
172: return '';
173: }
174:
175: sub start_while {
176: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
177:
178: my $code = @$parstack[$#$parstack];
179: $code =~ s/\"//g;
180: $code .=';return $condition;';
181:
182: push( @Apache::structuretags::whileconds, $code);
183: my $result = &Apache::run::run($code,$safeeval);
184: my $bodytext=$$parser[$#$parser]->get_text("/while");
185: push( @Apache::structuretags::whilebody, $bodytext);
186: if ( $result ) {
187: &Apache::lonxml::newparser($parser,\$bodytext);
188: }
189: return "";
190: }
191:
192: sub end_while {
193: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
194: my $code = pop @Apache::structuretags::whileconds;
195: my $bodytext = pop @Apache::structuretags::whilebody;
196: my $result = &Apache::run::run($code,$safeeval);
197: if ( $result ) {
198: &Apache::lonxml::newparser($parser,\$bodytext);
199: }
200: return "";
201: }
202:
203: # <randomlist>
204: # <tag1>..</tag1>
205: # <tag2>..</tag2>
206: # <tag3>..</tag3>
207: # ...
208: # </randomlist>
209: sub start_randomlist {
210: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
211: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
212: my $b_parser= HTML::TokeParser->new(\$body);
213: my $b_tok;
214: my @randomlist;
215: my $list_item;
216:
217: while($b_tok = $b_parser->get_token() ) {
218: if($b_tok->[0] eq 'S') { # start tag
219: # get content of the tag until matching end tag
220: # get all text upto the matching tag
221: # and push the content into @randomlist
222: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
223: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
224: push(@randomlist,$list_item);
225: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
226: }
227: if($b_tok->[0] eq 'T') { # text
228: # what to do with text in between tags?
229: # print "<b>TEXT $b_tok->[1]</b><br />";
230: }
231: # if($b_tok->[0] eq 'E') { # end tag, should not happen
232: # print "<b>END-TAG $b_tok->[1]</b><br />";
233: # }
234: }
235: my @idx_arr = (0 .. $#randomlist);
236: &Apache::structuretags::shuffle(\@idx_arr);
237: my $bodytext = '';
238: for(0 .. $#randomlist) {
239: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
240: }
241:
242: &Apache::lonxml::newparser($parser,\$bodytext);
243: return "";
244: }
245:
246: sub shuffle {
247: my $a=shift;
248: my $i;
249: for($i=@$a;--$i;) {
250: my $j=int rand($i+1);
251: next if $i == $j;
252: @$a[$i,$j] = @$a[$j,$i];
253: }
254: }
255:
256: sub end_randomlist {
257: }
258:
259: sub start_part {
260: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
261: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
262: $Apache::inputtags::part=$id;
263: @Apache::inputtags::responselist = ();
264: if ($target eq 'meta') {
265: return &Apache::response::mandatory_part_meta;
266: } elsif ($target eq 'web' || $target eq 'grade') {
267: my ($status,$datemsg) = &Apache::lonhomework::check_date("OPEN_DATE",$id);
268: push (@Apache::inputtags::status,$status);
269: my $expression='$external::datestatus="'.$status.'";';
270: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
271: &Apache::run::run($expression,$safeeval);
272: if ( $status eq 'CLOSED' ) {
273: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
274: if ( $target eq "web" ) {
275: return "<br />Part is not open to be viewed. It $datemsg<br />";
276: }
277: }
278: }
279: return '';
280: }
281:
282: sub end_part {
283: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
284: &Apache::lonxml::debug("in end_part $target ");
285: my $status=$Apache::inputtags::status['-1'];
286: pop @Apache::inputtags::status;
287: if ( $target eq 'meta' ) { return ''; }
288: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
289: return &Apache::inputtags::grade;
290: }
291: if ($target eq 'web') {
292: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
293: }
294: return '';
295: }
296:
297: sub start_preduedate {
298: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
299: if ($target eq 'web' || $target eq 'grade') {
300: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
301: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
302: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
303: }
304: }
305: return '';
306: }
307:
308: sub end_preduedate {
309: return '';
310: }
311:
312: sub start_postanswerdate {
313: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
314: if ($target eq 'web' || $target eq 'grade') {
315: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
316: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
317: }
318: }
319: return '';
320: }
321:
322: sub end_postanswerdate {
323: return '';
324: }
325:
326: sub start_notsolved {
327: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
328: if ($target eq 'web' || $target eq 'grade') {
329: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
330: &Apache::lonxml::debug("not solved has :$gradestatus:");
331: if ($gradestatus =~ /^correct/) {
332: &Apache::lonxml::debug("skipping");
333: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
334: }
335: }
336: return '';
337: }
338:
339: sub end_notsolved {
340: return '';
341: }
342:
343: sub start_solved {
344: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
345: if ($target eq 'web' || $target eq 'grade') {
346: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
347: if ($gradestatus !~ /^correct/) {
348: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
349: }
350: }
351: return '';
352: }
353:
354: sub end_solved {
355: return '';
356: }
357:
358: sub start_startouttext {
359: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
360: my @result=(''.'');
361: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
362: return (@result);
363: }
364: sub end_startouttext {
365: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
366: my $result='';
367: my $text='';
368:
369: if ($target eq 'edit') {
370: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[$#$parser]);
371: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
372: <td>Delete:".
373: &Apache::edit::deletelist($target,$token)
374: ."</td>
375: <td>".
376: &Apache::edit::insertlist($target,$token).
377: "</td>
378: </tr><tr><td colspan=\"3\">\n".
379: &Apache::edit::editfield($token->[1],$text,"",50,5);
380: }
381: if ($target eq 'modified') {
382: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
383: $result='<startouttext />'.&Apache::edit::modifiedfield();
384: }
385: return $result;
386: }
387: sub start_endouttext {
388: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
389: my $result='';
390: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
391: if ($target eq "modified") { $result='<endouttext />'; }
392: return $result;
393: }
394: sub end_endouttext {
395: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
396: my @result=('','');
397: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
398: return (@result);
399: }
400:
401:
402: 1;
403: __END__
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