1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: # 2/19 Guy
4: # 6/26/2001 fixed extra web display at end of <web></web> tags
5: package Apache::structuretags;
6:
7: use strict;
8: use Apache::lonnet;
9:
10: sub BEGIN {
11: &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
12: # &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))
13: }
14:
15: sub start_web {
16: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
17: my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
18: if ($target eq 'web') {
19: return $bodytext;
20: }
21: return '';
22: }
23:
24: sub end_web {
25: return '';
26: }
27:
28: sub start_tex {
29: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
30: my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
31: if ($target eq 'tex') {
32: return $bodytext
33: }
34: return '';
35: }
36:
37: sub end_tex {
38: return '';
39: }
40:
41: sub page_start {
42: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
43: my $result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack,$parser,$safeeval);
44: my $head_tag_start='<head>'.&Apache::lonxml::registerurl();
45: my $body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '.
46: 'onUnload="'.&Apache::lonxml::unloadevents().'" ';
47: my $background=&Apache::lonxml::get_param('background',$parstack,$safeeval);
48: if ($background) {
49: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
50: $background;
51: $body_tag_start.='background="'.$background.'" ';
52: } else {
53: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval);
54: if ($bgcolor) {
55: $body_tag_start.='bgcolor="'.$bgcolor.'" ';
56: } else {
57: $body_tag_start.='bgcolor="#ffffff"';
58: }
59: }
60: $body_tag_start.='>';
61: return ($result,$head_tag_start,$body_tag_start);
62: }
63:
64: sub start_problem {
65: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
66:
67: #intialize globals
68: $Apache::inputtags::part='0';
69: @Apache::inputtags::responselist = ();
70: @Apache::inputtags::previous=();
71: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
72: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
73: if ($Apache::lonhomework::type eq '') {
74: $Apache::lonhomework::type='homework';
75: }
76: #adeed vars to the scripting enviroment
77: my $expression='$external::part='.$Apache::inputtags::part.';';
78: &Apache::run::run($expression,$safeeval);
79: my $status;
80: my $datemsg;
81:
82: #should get back a <html> or the neccesary stuff to start XML/MathML
83: my ($result,$head_tag_start,$body_tag_start)=
84: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
85:
86: if ($target eq 'web' || $target eq 'grade') {
87: ($status,$datemsg) = &Apache::lonhomework::check_date('0');
88: push (@Apache::inputtags::status,$status);
89: my $expression='$external::datestatus="'.$status.'";';
90: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
91: &Apache::run::run($expression,$safeeval);
92: if ( $status eq 'CLOSED' ) {
93: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
94: if ( $target eq "web" ) {
95: $result.= $head_tag_start.'</head>';
96: return $result . $body_tag_start .
97: " <br />Problem is not open to be viewed. The problem $datemsg<br />";
98: }
99: }
100: }
101: if ($target eq 'web') {
102: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
103: if ($name eq '') {
104: $name=&Apache::lonnet::EXT('resource.title');
105: if ($name eq 'con_lost') { $name = ''; }
106: }
107: $Apache::lonhomework::name=$name;
108: if ($status eq 'CAN_ANSWER') {
109: # create a page header and exit
110: $result.="$head_tag_start<title>$name</title></head>\n
111: $body_tag_start\n
112: <form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".
113: '<input type="hidden" name="submitted" value="yes" />';
114: if ($ENV{'request.state'} eq "construct") {
115: $result.='<input type="hidden" name="problemmode" value="View" />
116: <input type="submit" name="problemmode" value="Edit" /><hr />';
117: }
118: return $result;
119: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' || $status eq 'CLOSED') {
120: return $result.$head_tag_start."<title>$name</title></head>\n$body_tag_start\n";
121: }
122: }
123: if ($target eq 'edit') {
124: $result.=$head_tag_start."</head>".$body_tag_start.
125: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
126: <input type="hidden" name="submitted" value="edit" />
127: <input type="hidden" name="problemmode" value="Edit" />
128: <input type="submit" name="problemmode" value="View" />
129: <input type="submit" name="Undo" value="undo" /> <hr />
130: <input type="submit" name="submit" value="Submit Changes" /><br />
131: ';
132: my $temp=&Apache::edit::insertlist($target,$token);
133: $result.=$temp;
134: return $result;
135: }
136: if ($target eq 'modified') {
137: $result=$token->[4];
138: $result.=&Apache::edit::handle_insert();
139: return $result;
140: }
141: return '';
142: }
143:
144: sub end_problem {
145: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
146: my $result='';
147: my $status=$Apache::inputtags::status['-1'];
148: if ($target eq 'grade' || $target eq 'web' ) {
149: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
150: $status eq 'CAN_ANSWER') {
151: # if part is zero, no <part>s existed, so we need to the grading
152: &Apache::inputtags::grade;
153: } elsif ($Apache::inputtags::part eq '0') {
154: # if part is zero, no <part>s existed, so we need show the current
155: # grading status
156: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
157: }
158: if ($target eq 'web') {
159: if ($status eq 'CAN_ANSWER') {
160: $result.="</form></body>\n";
161: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {
162: $result.="</body>\n";
163: }
164: $result.=&Apache::lonxml::xmlend();
165: }
166: }
167: if ($target eq 'meta') {
168: if ($Apache::inputtags::part eq '0') {
169: $result=&Apache::response::mandatory_part_meta;
170: }
171: }
172: if ($target eq 'edit') {
173: &Apache::lonxml::debug("in end_problem with $target, edit");
174: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
175: }
176: return $result;
177: }
178:
179: sub start_library {
180: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
181: my ($result,$head_tag_start,$body_tag_start)=
182: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
183: if ($target eq 'edit') {
184: $result.=$head_tag_start."</head>".$body_tag_start.
185: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
186: <input type="hidden" name="submitted" value="edit" />
187: <input type="hidden" name="problemmode" value="Edit" />
188: <input type="submit" name="problemmode" value="View" />
189: <input type="submit" name="Undo" value="undo" /> <hr />
190: ';
191: my $temp=&Apache::edit::insertlist($target,$token);
192: $result.=$temp;
193: return $result;
194: }
195: if ($target eq 'modified') {
196: $result=$token->[4];
197: $result.=&Apache::edit::handle_insert();
198: return $result;
199: }
200: return '';
201: }
202:
203: sub end_library {
204: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
205: my $result='';
206: if ($target eq 'edit') {
207: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
208: }
209: return $result;
210: }
211:
212: sub start_block {
213: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
214:
215: if ($target eq 'web' || $target eq 'grade') {
216: my $code = @$parstack[$#$parstack];
217: $code =~ s/\"//g;
218: $code .=';return $condition;';
219: # print "<br />$code<br />";
220: my $result = &Apache::run::run($code,$safeeval);
221: &Apache::lonxml::debug("block :$code: returned :$result:");
222: if ( ! $result ) {
223: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
224: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
225: }
226: }
227: return "";
228: }
229:
230: sub end_block {
231: return '';
232: }
233:
234: sub start_while {
235: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
236:
237: my $code = @$parstack[$#$parstack];
238: $code =~ s/\"//g;
239: $code .=';return $condition;';
240:
241: push( @Apache::structuretags::whileconds, $code);
242: my $result = &Apache::run::run($code,$safeeval);
243: my $bodytext=$$parser[$#$parser]->get_text("/while");
244: push( @Apache::structuretags::whilebody, $bodytext);
245: if ( $result ) {
246: &Apache::lonxml::newparser($parser,\$bodytext);
247: }
248: return "";
249: }
250:
251: sub end_while {
252: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
253: my $code = pop @Apache::structuretags::whileconds;
254: my $bodytext = pop @Apache::structuretags::whilebody;
255: my $result = &Apache::run::run($code,$safeeval);
256: if ( $result ) {
257: &Apache::lonxml::newparser($parser,\$bodytext);
258: }
259: return "";
260: }
261:
262: # <randomlist>
263: # <tag1>..</tag1>
264: # <tag2>..</tag2>
265: # <tag3>..</tag3>
266: # ...
267: # </randomlist>
268: sub start_randomlist {
269: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
270: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
271: my $b_parser= HTML::TokeParser->new(\$body);
272: my $b_tok;
273: my @randomlist;
274: my $list_item;
275:
276: while($b_tok = $b_parser->get_token() ) {
277: if($b_tok->[0] eq 'S') { # start tag
278: # get content of the tag until matching end tag
279: # get all text upto the matching tag
280: # and push the content into @randomlist
281: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
282: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
283: push(@randomlist,$list_item);
284: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
285: }
286: if($b_tok->[0] eq 'T') { # text
287: # what to do with text in between tags?
288: # print "<b>TEXT $b_tok->[1]</b><br />";
289: }
290: # if($b_tok->[0] eq 'E') { # end tag, should not happen
291: # print "<b>END-TAG $b_tok->[1]</b><br />";
292: # }
293: }
294: my @idx_arr = (0 .. $#randomlist);
295: &Apache::structuretags::shuffle(\@idx_arr);
296: my $bodytext = '';
297: for(0 .. $#randomlist) {
298: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
299: }
300:
301: &Apache::lonxml::newparser($parser,\$bodytext);
302: return "";
303: }
304:
305: sub shuffle {
306: my $a=shift;
307: my $i;
308: &Apache::response::setrandomnumber();
309: for($i=@$a;--$i;) {
310: my $j=int rand($i+1);
311: next if $i == $j;
312: @$a[$i,$j] = @$a[$j,$i];
313: }
314: }
315:
316: sub end_randomlist {
317: return '';
318: }
319:
320: sub start_part {
321: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
322: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
323: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
324: $Apache::inputtags::part=$id;
325: @Apache::inputtags::responselist = ();
326: @Apache::inputtags::previous=();
327: if ($target eq 'meta') {
328: return &Apache::response::mandatory_part_meta;
329: } elsif ($target eq 'web' || $target eq 'grade') {
330: my ($status,$datemsg) = &Apache::lonhomework::check_date($id);
331: push (@Apache::inputtags::status,$status);
332: my $expression='$external::datestatus="'.$status.'";';
333: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
334: &Apache::run::run($expression,$safeeval);
335: if ( $status eq 'CLOSED' ) {
336: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
337: if ( $target eq "web" ) {
338: return "<br />Part is not open to be viewed. It $datemsg<br />";
339: }
340: }
341: }
342: return '';
343: }
344:
345: sub end_part {
346: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
347: &Apache::lonxml::debug("in end_part $target ");
348: my $status=$Apache::inputtags::status['-1'];
349: pop @Apache::inputtags::status;
350: if ( $target eq 'meta' ) { return ''; }
351: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
352: return &Apache::inputtags::grade;
353: }
354: if ($target eq 'web') {
355: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
356: }
357: return '';
358: }
359:
360: sub start_preduedate {
361: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
362: if ($target eq 'web' || $target eq 'grade') {
363: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
364: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
365: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
366: }
367: }
368: return '';
369: }
370:
371: sub end_preduedate {
372: return '';
373: }
374:
375: sub start_postanswerdate {
376: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
377: if ($target eq 'web' || $target eq 'grade') {
378: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
379: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
380: }
381: }
382: return '';
383: }
384:
385: sub end_postanswerdate {
386: return '';
387: }
388:
389: sub start_notsolved {
390: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
391: if ($target eq 'web' || $target eq 'grade') {
392: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
393: &Apache::lonxml::debug("not solved has :$gradestatus:");
394: if ($gradestatus =~ /^correct/) {
395: &Apache::lonxml::debug("skipping");
396: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
397: }
398: }
399: return '';
400: }
401:
402: sub end_notsolved {
403: return '';
404: }
405:
406: sub start_solved {
407: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
408: if ($target eq 'web' || $target eq 'grade') {
409: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
410: if ($gradestatus !~ /^correct/) {
411: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
412: }
413: }
414: return '';
415: }
416:
417: sub end_solved {
418: return '';
419: }
420:
421: sub start_startouttext {
422: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
423: my @result=(''.'');
424: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
425: return (@result);
426: }
427: sub end_startouttext {
428: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
429: my $result='';
430: my $text='';
431:
432: if ($target eq 'edit') {
433: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[$#$parser]);
434: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
435: <td>Delete:".
436: &Apache::edit::deletelist($target,$token)
437: ."</td>
438: <td>".
439: &Apache::edit::insertlist($target,$token).
440: "</td>
441: </tr><tr><td colspan=\"3\">\n".
442: &Apache::edit::editfield($token->[1],$text,"",50,4);
443: }
444: if ($target eq 'modified') {
445: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
446: $result='<startouttext />'.&Apache::edit::modifiedfield();
447: }
448: return $result;
449: }
450: sub start_endouttext {
451: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
452: my $result='';
453: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
454: if ($target eq "modified") { $result='<endouttext />'; }
455: return $result;
456: }
457: sub end_endouttext {
458: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
459: my @result=('','');
460: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
461: return (@result);
462: }
463: sub delete_startouttext {
464: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
465: # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
466: my $text=$$parser['-1']->get_text("/endouttext");
467: my $token=$$parser['-1']->get_token();
468: &Apache::lonxml::debug("Deleting :$text: and :$token->[0]:$token->[1]:$token->[2]: for startouttext");
469: &Apache::lonxml::end_tag($tagstack,$parstack,$token);
470: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
471: # they did the last time round
472: &Apache::lonxml::increasedepth($token);
473: &Apache::lonxml::decreasedepth($token);
474: return 1;
475: }
476:
477: 1;
478: __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