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: my $uri=$ENV{'request.uri'};
75: if ($uri=~/\.(\w+)$/) {
76: $Apache::lonhomework::type=$1;
77: &Apache::lonxml::debug("Using type of $1");
78: } else {
79: $Apache::lonhomework::type='problem';
80: &Apache::lonxml::debug("Using default type, problem, :$uri:");
81: }
82: }
83: #adeed vars to the scripting enviroment
84: my $expression='$external::part='.$Apache::inputtags::part.';';
85: &Apache::run::run($expression,$safeeval);
86: my $status;
87: my $datemsg;
88:
89: #should get back a <html> or the neccesary stuff to start XML/MathML
90: my ($result,$head_tag_start,$body_tag_start)=
91: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
92:
93: if ($target eq 'web' || $target eq 'grade') {
94: ($status,$datemsg) = &Apache::lonhomework::check_date('0');
95: push (@Apache::inputtags::status,$status);
96: my $expression='$external::datestatus="'.$status.'";';
97: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
98: &Apache::run::run($expression,$safeeval);
99: if ( $status eq 'CLOSED' ) {
100: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
101: if ( $target eq "web" ) {
102: $result.= $head_tag_start.'</head>';
103: return $result . $body_tag_start .
104: " <br />Problem is not open to be viewed. The problem $datemsg<br />";
105: }
106: }
107: }
108: if ($target eq 'web') {
109: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
110: if ($name eq '') {
111: $name=&Apache::lonnet::EXT('resource.title');
112: if ($name eq 'con_lost') { $name = ''; }
113: }
114: $Apache::lonhomework::name=$name;
115: if ($status eq 'CAN_ANSWER') {
116: # create a page header and exit
117: $result.="$head_tag_start<title>$name</title></head>\n
118: $body_tag_start\n
119: <form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".
120: '<input type="hidden" name="submitted" value="yes" />';
121: if ($ENV{'request.state'} eq "construct") {
122: $result.='<input type="hidden" name="problemmode" value="View" />
123: <input type="submit" name="problemmode" value="Edit" /><hr />';
124: }
125: return $result;
126: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' || $status eq 'CLOSED') {
127: return $result.$head_tag_start."<title>$name</title></head>\n$body_tag_start\n";
128: }
129: }
130: if ($target eq 'edit') {
131: $result.=$head_tag_start."</head>".$body_tag_start.
132: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
133: <input type="hidden" name="submitted" value="edit" />
134: <input type="hidden" name="problemmode" value="Edit" />
135: <input type="submit" name="problemmode" value="View" />
136: <input type="submit" name="Undo" value="undo" /> <hr />
137: <input type="submit" name="submit" value="Submit Changes" /><br />
138: ';
139: my $temp=&Apache::edit::insertlist($target,$token);
140: $result.=$temp;
141: return $result;
142: }
143: if ($target eq 'modified') {
144: $result=$token->[4];
145: $result.=&Apache::edit::handle_insert();
146: return $result;
147: }
148: return '';
149: }
150:
151: sub end_problem {
152: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
153: my $result='';
154: my $status=$Apache::inputtags::status['-1'];
155: if ($target eq 'grade' || $target eq 'web' ) {
156: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
157: $status eq 'CAN_ANSWER') {
158: # if part is zero, no <part>s existed, so we need to the grading
159: &Apache::inputtags::grade;
160: } elsif ($Apache::inputtags::part eq '0') {
161: # if part is zero, no <part>s existed, so we need show the current
162: # grading status
163: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
164: }
165: if ($target eq 'web') {
166: if ($status eq 'CAN_ANSWER') {
167: $result.="</form></body>\n";
168: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {
169: $result.="</body>\n";
170: }
171: $result.=&Apache::lonxml::xmlend();
172: }
173: }
174: if ($target eq 'meta') {
175: if ($Apache::inputtags::part eq '0') {
176: $result=&Apache::response::mandatory_part_meta;
177: }
178: }
179: if ($target eq 'edit') {
180: &Apache::lonxml::debug("in end_problem with $target, edit");
181: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
182: }
183: return $result;
184: }
185:
186: sub start_library {
187: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
188: my ($result,$head_tag_start,$body_tag_start)=
189: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
190: if ($target eq 'edit') {
191: $result.=$head_tag_start."</head>".$body_tag_start.
192: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
193: <input type="hidden" name="submitted" value="edit" />
194: <input type="hidden" name="problemmode" value="Edit" />
195: <input type="submit" name="problemmode" value="View" />
196: <input type="submit" name="Undo" value="undo" /> <hr />
197: ';
198: my $temp=&Apache::edit::insertlist($target,$token);
199: $result.=$temp;
200: return $result;
201: }
202: if ($target eq 'modified') {
203: $result=$token->[4];
204: $result.=&Apache::edit::handle_insert();
205: return $result;
206: }
207: return '';
208: }
209:
210: sub end_library {
211: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
212: my $result='';
213: if ($target eq 'edit') {
214: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
215: }
216: return $result;
217: }
218:
219: sub start_block {
220: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
221:
222: if ($target eq 'web' || $target eq 'grade') {
223: my $code = @$parstack[$#$parstack];
224: $code =~ s/\"//g;
225: $code .=';return $condition;';
226: # print "<br />$code<br />";
227: my $result = &Apache::run::run($code,$safeeval);
228: &Apache::lonxml::debug("block :$code: returned :$result:");
229: if ( ! $result ) {
230: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
231: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
232: }
233: }
234: return "";
235: }
236:
237: sub end_block {
238: return '';
239: }
240:
241: sub start_while {
242: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
243:
244: my $code = @$parstack[$#$parstack];
245: $code =~ s/\"//g;
246: $code .=';return $condition;';
247:
248: push( @Apache::structuretags::whileconds, $code);
249: my $result = &Apache::run::run($code,$safeeval);
250: my $bodytext=$$parser[$#$parser]->get_text("/while");
251: push( @Apache::structuretags::whilebody, $bodytext);
252: if ( $result ) {
253: &Apache::lonxml::newparser($parser,\$bodytext);
254: }
255: return "";
256: }
257:
258: sub end_while {
259: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
260: my $code = pop @Apache::structuretags::whileconds;
261: my $bodytext = pop @Apache::structuretags::whilebody;
262: my $result = &Apache::run::run($code,$safeeval);
263: if ( $result ) {
264: &Apache::lonxml::newparser($parser,\$bodytext);
265: }
266: return "";
267: }
268:
269: # <randomlist>
270: # <tag1>..</tag1>
271: # <tag2>..</tag2>
272: # <tag3>..</tag3>
273: # ...
274: # </randomlist>
275: sub start_randomlist {
276: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
277: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
278: my $b_parser= HTML::TokeParser->new(\$body);
279: my $b_tok;
280: my @randomlist;
281: my $list_item;
282:
283: while($b_tok = $b_parser->get_token() ) {
284: if($b_tok->[0] eq 'S') { # start tag
285: # get content of the tag until matching end tag
286: # get all text upto the matching tag
287: # and push the content into @randomlist
288: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
289: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
290: push(@randomlist,$list_item);
291: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
292: }
293: if($b_tok->[0] eq 'T') { # text
294: # what to do with text in between tags?
295: # print "<b>TEXT $b_tok->[1]</b><br />";
296: }
297: # if($b_tok->[0] eq 'E') { # end tag, should not happen
298: # print "<b>END-TAG $b_tok->[1]</b><br />";
299: # }
300: }
301: my @idx_arr = (0 .. $#randomlist);
302: &Apache::structuretags::shuffle(\@idx_arr);
303: my $bodytext = '';
304: for(0 .. $#randomlist) {
305: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
306: }
307:
308: &Apache::lonxml::newparser($parser,\$bodytext);
309: return "";
310: }
311:
312: sub shuffle {
313: my $a=shift;
314: my $i;
315: &Apache::response::setrandomnumber();
316: for($i=@$a;--$i;) {
317: my $j=int rand($i+1);
318: next if $i == $j;
319: @$a[$i,$j] = @$a[$j,$i];
320: }
321: }
322:
323: sub end_randomlist {
324: return '';
325: }
326:
327: sub start_part {
328: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
329: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
330: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
331: $Apache::inputtags::part=$id;
332: @Apache::inputtags::responselist = ();
333: @Apache::inputtags::previous=();
334: if ($target eq 'meta') {
335: return &Apache::response::mandatory_part_meta;
336: } elsif ($target eq 'web' || $target eq 'grade') {
337: my ($status,$datemsg) = &Apache::lonhomework::check_date($id);
338: push (@Apache::inputtags::status,$status);
339: my $expression='$external::datestatus="'.$status.'";';
340: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
341: &Apache::run::run($expression,$safeeval);
342: if ( $status eq 'CLOSED' ) {
343: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
344: if ( $target eq "web" ) {
345: return "<br />Part is not open to be viewed. It $datemsg<br />";
346: }
347: }
348: }
349: return '';
350: }
351:
352: sub end_part {
353: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
354: &Apache::lonxml::debug("in end_part $target ");
355: my $status=$Apache::inputtags::status['-1'];
356: pop @Apache::inputtags::status;
357: if ( $target eq 'meta' ) { return ''; }
358: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
359: return &Apache::inputtags::grade;
360: }
361: if ($target eq 'web') {
362: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
363: }
364: return '';
365: }
366:
367: sub start_preduedate {
368: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
369: if ($target eq 'web' || $target eq 'grade') {
370: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
371: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
372: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
373: }
374: }
375: return '';
376: }
377:
378: sub end_preduedate {
379: return '';
380: }
381:
382: sub start_postanswerdate {
383: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
384: if ($target eq 'web' || $target eq 'grade') {
385: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
386: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
387: }
388: }
389: return '';
390: }
391:
392: sub end_postanswerdate {
393: return '';
394: }
395:
396: sub start_notsolved {
397: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
398: if ($target eq 'web' || $target eq 'grade') {
399: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
400: &Apache::lonxml::debug("not solved has :$gradestatus:");
401: if ($gradestatus =~ /^correct/) {
402: &Apache::lonxml::debug("skipping");
403: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
404: }
405: }
406: return '';
407: }
408:
409: sub end_notsolved {
410: return '';
411: }
412:
413: sub start_solved {
414: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
415: if ($target eq 'web' || $target eq 'grade') {
416: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
417: if ($gradestatus !~ /^correct/) {
418: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
419: }
420: }
421: return '';
422: }
423:
424: sub end_solved {
425: return '';
426: }
427:
428: sub start_startouttext {
429: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
430: my @result=(''.'');
431: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
432: return (@result);
433: }
434: sub end_startouttext {
435: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
436: my $result='';
437: my $text='';
438:
439: if ($target eq 'edit') {
440: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[$#$parser]);
441: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
442: <td>Delete:".
443: &Apache::edit::deletelist($target,$token)
444: ."</td>
445: <td>".
446: &Apache::edit::insertlist($target,$token).
447: "</td>
448: </tr><tr><td colspan=\"3\">\n".
449: &Apache::edit::editfield($token->[1],$text,"",50,4);
450: }
451: if ($target eq 'modified') {
452: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
453: $result='<startouttext />'.&Apache::edit::modifiedfield();
454: }
455: return $result;
456: }
457: sub start_endouttext {
458: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
459: my $result='';
460: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
461: if ($target eq "modified") { $result='<endouttext />'; }
462: return $result;
463: }
464: sub end_endouttext {
465: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
466: my @result=('','');
467: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
468: return (@result);
469: }
470: sub delete_startouttext {
471: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
472: # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
473: my $text=$$parser['-1']->get_text("/endouttext");
474: my $token=$$parser['-1']->get_token();
475: &Apache::lonxml::debug("Deleting :$text: and :$token->[0]:$token->[1]:$token->[2]: for startouttext");
476: &Apache::lonxml::end_tag($tagstack,$parstack,$token);
477: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
478: # they did the last time round
479: &Apache::lonxml::increasedepth($token);
480: &Apache::lonxml::decreasedepth($token);
481: return 1;
482: }
483:
484: 1;
485: __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