Annotation of loncom/homework/structuretags.pm, revision 1.50
1.34 albertel 1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
1.33 albertel 3: # 2/19 Guy
1.44 ng 4: # 6/26/2001 fixed extra web display at end of <web></web> tags
1.1 albertel 5: package Apache::structuretags;
6:
7: use strict;
8: use Apache::lonnet;
9:
10: sub BEGIN {
1.48 albertel 11: &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
1.37 albertel 12: # &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))
1.10 albertel 13: }
14:
15: sub start_web {
1.40 albertel 16: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.10 albertel 17: my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
1.19 albertel 18: if ($target eq 'web') {
19: return $bodytext;
20: }
21: return '';
1.10 albertel 22: }
23:
24: sub end_web {
1.44 ng 25: return '';
1.10 albertel 26: }
27:
28: sub start_tex {
1.40 albertel 29: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.10 albertel 30: my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
1.19 albertel 31: if ($target eq 'tex') {
32: return $bodytext
33: }
1.10 albertel 34: return '';
35: }
36:
37: sub end_tex {
1.44 ng 38: return '';
1.9 albertel 39: }
40:
1.48 albertel 41: sub page_start {
42: my ($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().'" '.
1.50 ! albertel 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: $body_tag_start.='>';
1.48 albertel 61: return ($result,$head_tag_start,$body_tag_start);
62: }
63:
1.9 albertel 64: sub start_problem {
1.40 albertel 65: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19 albertel 66:
67: #intialize globals
68: $Apache::inputtags::part='0';
69: @Apache::inputtags::responselist = ();
1.42 albertel 70: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
71: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
72: if ($Apache::lonhomework::type eq '') {
73: $Apache::lonhomework::type='homework';
74: }
1.19 albertel 75: #adeed vars to the scripting enviroment
76: my $expression='$external::part='.$Apache::inputtags::part.';';
77: &Apache::run::run($expression,$safeeval);
1.22 albertel 78: my $status;
79: my $datemsg;
1.36 albertel 80:
1.41 albertel 81: #should get back a <html> or the neccesary stuff to start XML/MathML
1.48 albertel 82: my ($result,$head_tag_start,$body_tag_start)=
83: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
1.36 albertel 84:
1.34 albertel 85: if ($target eq 'web' || $target eq 'grade') {
1.22 albertel 86: ($status,$datemsg) = &Apache::lonhomework::check_date('0');
87: push (@Apache::inputtags::status,$status);
1.24 albertel 88: my $expression='$external::datestatus="'.$status.'";';
89: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
90: &Apache::run::run($expression,$safeeval);
1.22 albertel 91: if ( $status eq 'CLOSED' ) {
1.21 albertel 92: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
93: if ( $target eq "web" ) {
1.41 albertel 94: $result.= $head_tag_start.'</head>';
95: return $result . $body_tag_start .
96: " <br />Problem is not open to be viewed. The problem $datemsg<br />";
1.21 albertel 97: }
1.41 albertel 98: }
1.21 albertel 99: }
1.19 albertel 100: if ($target eq 'web') {
1.39 albertel 101: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
1.30 albertel 102: if ($name eq '') {
103: $name=&Apache::lonnet::EXT('resource.title');
104: if ($name eq 'con_lost') { $name = ''; }
105: }
106: $Apache::lonhomework::name=$name;
1.22 albertel 107: if ($status eq 'CAN_ANSWER') {
108: # create a page header and exit
1.41 albertel 109: $result.="$head_tag_start<title>$name</title></head>\n
110: $body_tag_start\n
1.36 albertel 111: <form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".
112: '<input type="hidden" name="submitted" value="yes" />';
113: if ($ENV{'request.state'} eq "construct") {
114: $result.='<input type="hidden" name="problemmode" value="View" />
115: <input type="submit" name="problemmode" value="Edit" /><hr />';
116: }
117: return $result;
1.29 albertel 118: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' || $status eq 'CLOSED') {
1.41 albertel 119: return $result.$head_tag_start."<title>$name</title></head>\n$body_tag_start\n";
1.22 albertel 120: }
121: }
1.34 albertel 122: if ($target eq 'edit') {
1.41 albertel 123: $result.=$head_tag_start."</head>".$body_tag_start.
124: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
125: <input type="hidden" name="submitted" value="edit" />
126: <input type="hidden" name="problemmode" value="Edit" />
127: <input type="submit" name="problemmode" value="View" />
128: <input type="submit" name="Undo" value="undo" /> <hr />
1.49 albertel 129: <input type="submit" name="submit" value="Submit Changes" /><br />
1.41 albertel 130: ';
1.39 albertel 131: my $temp=&Apache::edit::insertlist($target,$token);
1.36 albertel 132: $result.=$temp;
133: return $result;
1.34 albertel 134: }
1.37 albertel 135: if ($target eq 'modified') {
136: $result=$token->[4];
137: $result.=&Apache::edit::handle_insert();
138: return $result;
139: }
1.19 albertel 140: return '';
1.9 albertel 141: }
142:
143: sub end_problem {
1.40 albertel 144: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.16 albertel 145: my $result='';
1.24 albertel 146: my $status=$Apache::inputtags::status['-1'];
1.40 albertel 147: if ($target eq 'grade' || $target eq 'web' ) {
1.28 albertel 148: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
149: $status eq 'CAN_ANSWER') {
1.19 albertel 150: # if part is zero, no <part>s existed, so we need to the grading
151: &Apache::inputtags::grade;
152: } elsif ($Apache::inputtags::part eq '0') {
153: # if part is zero, no <part>s existed, so we need show the current
154: # grading status
1.20 albertel 155: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
1.41 albertel 156: }
1.22 albertel 157: if ($target eq 'web') {
158: if ($status eq 'CAN_ANSWER') {
159: $result.="</form></body>\n";
1.28 albertel 160: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {
1.41 albertel 161: $result.="</body>\n";
162: }
1.50 ! albertel 163: $result.=&Apache::lonxml::xmlend();
1.22 albertel 164: }
1.41 albertel 165: }
1.34 albertel 166: if ($target eq 'meta') {
1.18 albertel 167: if ($Apache::inputtags::part eq '0') {
1.16 albertel 168: $result=&Apache::response::mandatory_part_meta;
169: }
170: }
1.34 albertel 171: if ($target eq 'edit') {
172: &Apache::lonxml::debug("in end_problem with $target, edit");
1.48 albertel 173: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
174: }
175: return $result;
176: }
177:
178: sub start_library {
179: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
180: my ($result,$head_tag_start,$body_tag_start)=
181: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
182: if ($target eq 'edit') {
183: $result.=$head_tag_start."</head>".$body_tag_start.
184: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
185: <input type="hidden" name="submitted" value="edit" />
186: <input type="hidden" name="problemmode" value="Edit" />
187: <input type="submit" name="problemmode" value="View" />
188: <input type="submit" name="Undo" value="undo" /> <hr />
189: ';
190: my $temp=&Apache::edit::insertlist($target,$token);
191: $result.=$temp;
192: return $result;
193: }
194: if ($target eq 'modified') {
195: $result=$token->[4];
196: $result.=&Apache::edit::handle_insert();
197: return $result;
198: }
199: return '';
200: }
201:
202: sub end_library {
203: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
204: my $result='';
205: if ($target eq 'edit') {
1.34 albertel 206: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
207: }
1.16 albertel 208: return $result;
1.1 albertel 209: }
210:
211: sub start_block {
1.40 albertel 212: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.1 albertel 213:
1.38 albertel 214: if ($target eq 'web' || $target eq 'grade') {
215: my $code = @$parstack[$#$parstack];
216: $code =~ s/\"//g;
217: $code .=';return $condition;';
218: # print "<br />$code<br />";
219: my $result = &Apache::run::run($code,$safeeval);
220: &Apache::lonxml::debug("block :$code: returned :$result:");
221: if ( ! $result ) {
222: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
223: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
224: }
1.1 albertel 225: }
226: return "";
227: }
228:
229: sub end_block {
1.38 albertel 230: return '';
1.4 tsai 231: }
232:
233: sub start_while {
1.40 albertel 234: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.4 tsai 235:
236: my $code = @$parstack[$#$parstack];
237: $code =~ s/\"//g;
238: $code .=';return $condition;';
239:
1.5 tsai 240: push( @Apache::structuretags::whileconds, $code);
1.4 tsai 241: my $result = &Apache::run::run($code,$safeeval);
242: my $bodytext=$$parser[$#$parser]->get_text("/while");
1.5 tsai 243: push( @Apache::structuretags::whilebody, $bodytext);
244: if ( $result ) {
1.8 albertel 245: &Apache::lonxml::newparser($parser,\$bodytext);
1.4 tsai 246: }
247: return "";
248: }
249:
250: sub end_while {
1.40 albertel 251: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.5 tsai 252: my $code = pop @Apache::structuretags::whileconds;
253: my $bodytext = pop @Apache::structuretags::whilebody;
254: my $result = &Apache::run::run($code,$safeeval);
255: if ( $result ) {
1.8 albertel 256: &Apache::lonxml::newparser($parser,\$bodytext);
1.5 tsai 257: }
258: return "";
1.1 albertel 259: }
1.6 tsai 260:
261: # <randomlist>
262: # <tag1>..</tag1>
263: # <tag2>..</tag2>
264: # <tag3>..</tag3>
265: # ...
266: # </randomlist>
267: sub start_randomlist {
1.40 albertel 268: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.9 albertel 269: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
1.6 tsai 270: my $b_parser= HTML::TokeParser->new(\$body);
271: my $b_tok;
272: my @randomlist;
273: my $list_item;
274:
275: while($b_tok = $b_parser->get_token() ) {
276: if($b_tok->[0] eq 'S') { # start tag
277: # get content of the tag until matching end tag
278: # get all text upto the matching tag
279: # and push the content into @randomlist
1.9 albertel 280: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
1.7 tsai 281: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
1.6 tsai 282: push(@randomlist,$list_item);
1.32 albertel 283: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
1.6 tsai 284: }
285: if($b_tok->[0] eq 'T') { # text
286: # what to do with text in between tags?
1.32 albertel 287: # print "<b>TEXT $b_tok->[1]</b><br />";
1.6 tsai 288: }
289: # if($b_tok->[0] eq 'E') { # end tag, should not happen
1.32 albertel 290: # print "<b>END-TAG $b_tok->[1]</b><br />";
1.6 tsai 291: # }
292: }
1.7 tsai 293: my @idx_arr = (0 .. $#randomlist);
294: &Apache::structuretags::shuffle(\@idx_arr);
295: my $bodytext = '';
296: for(0 .. $#randomlist) {
297: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
298: }
1.8 albertel 299:
300: &Apache::lonxml::newparser($parser,\$bodytext);
1.6 tsai 301: return "";
1.7 tsai 302: }
303:
304: sub shuffle {
305: my $a=shift;
306: my $i;
307: for($i=@$a;--$i;) {
308: my $j=int rand($i+1);
309: next if $i == $j;
310: @$a[$i,$j] = @$a[$j,$i];
311: }
1.6 tsai 312: }
313:
314: sub end_randomlist {
1.46 albertel 315: return '';
1.6 tsai 316: }
317:
1.11 albertel 318: sub start_part {
1.40 albertel 319: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.39 albertel 320: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1.47 albertel 321: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
1.14 albertel 322: $Apache::inputtags::part=$id;
1.18 albertel 323: @Apache::inputtags::responselist = ();
1.15 www 324: if ($target eq 'meta') {
1.16 albertel 325: return &Apache::response::mandatory_part_meta;
1.37 albertel 326: } elsif ($target eq 'web' || $target eq 'grade') {
1.47 albertel 327: my ($status,$datemsg) = &Apache::lonhomework::check_date($id);
1.23 albertel 328: push (@Apache::inputtags::status,$status);
329: my $expression='$external::datestatus="'.$status.'";';
330: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
331: &Apache::run::run($expression,$safeeval);
332: if ( $status eq 'CLOSED' ) {
1.21 albertel 333: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
334: if ( $target eq "web" ) {
1.32 albertel 335: return "<br />Part is not open to be viewed. It $datemsg<br />";
1.21 albertel 336: }
337: }
1.15 www 338: }
1.19 albertel 339: return '';
1.11 albertel 340: }
341:
342: sub end_part {
1.40 albertel 343: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.18 albertel 344: &Apache::lonxml::debug("in end_part $target ");
1.28 albertel 345: my $status=$Apache::inputtags::status['-1'];
1.23 albertel 346: pop @Apache::inputtags::status;
1.19 albertel 347: if ( $target eq 'meta' ) { return ''; }
1.37 albertel 348: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
349: return &Apache::inputtags::grade;
1.28 albertel 350: }
1.37 albertel 351: if ($target eq 'web') {
352: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
353: }
354: return '';
1.11 albertel 355: }
1.1 albertel 356:
1.25 albertel 357: sub start_preduedate {
1.40 albertel 358: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 359: if ($target eq 'web' || $target eq 'grade') {
1.29 albertel 360: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
361: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
1.26 albertel 362: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
1.24 albertel 363: }
364: }
365: return '';
366: }
367:
1.25 albertel 368: sub end_preduedate {
1.24 albertel 369: return '';
370: }
371:
1.25 albertel 372: sub start_postanswerdate {
1.40 albertel 373: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 374: if ($target eq 'web' || $target eq 'grade') {
1.24 albertel 375: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1.26 albertel 376: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
1.24 albertel 377: }
378: }
379: return '';
380: }
381:
1.25 albertel 382: sub end_postanswerdate {
1.24 albertel 383: return '';
384: }
385:
1.25 albertel 386: sub start_notsolved {
1.40 albertel 387: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 388: if ($target eq 'web' || $target eq 'grade') {
1.24 albertel 389: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
390: &Apache::lonxml::debug("not solved has :$gradestatus:");
391: if ($gradestatus =~ /^correct/) {
392: &Apache::lonxml::debug("skipping");
1.26 albertel 393: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
1.24 albertel 394: }
395: }
396: return '';
397: }
398:
1.25 albertel 399: sub end_notsolved {
1.24 albertel 400: return '';
401: }
402:
403: sub start_solved {
1.40 albertel 404: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 405: if ($target eq 'web' || $target eq 'grade') {
1.24 albertel 406: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
407: if ($gradestatus !~ /^correct/) {
408: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
409: }
410: }
411: return '';
412: }
413:
414: sub end_solved {
415: return '';
416: }
1.34 albertel 417:
418: sub start_startouttext {
1.40 albertel 419: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.35 albertel 420: my @result=(''.'');
421: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
422: return (@result);
1.34 albertel 423: }
424: sub end_startouttext {
1.40 albertel 425: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 426: my $result='';
1.35 albertel 427: my $text='';
428:
1.34 albertel 429: if ($target eq 'edit') {
1.35 albertel 430: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[$#$parser]);
1.43 albertel 431: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1.42 albertel 432: <td>Delete:".
433: &Apache::edit::deletelist($target,$token)
434: ."</td>
435: <td>".
436: &Apache::edit::insertlist($target,$token).
437: "</td>
438: </tr><tr><td colspan=\"3\">\n".
1.45 albertel 439: &Apache::edit::editfield($token->[1],$text,"",50,4);
1.35 albertel 440: }
441: if ($target eq 'modified') {
442: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
443: $result='<startouttext />'.&Apache::edit::modifiedfield();
1.34 albertel 444: }
445: return $result;
446: }
447: sub start_endouttext {
1.40 albertel 448: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 449: my $result='';
1.43 albertel 450: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
1.35 albertel 451: if ($target eq "modified") { $result='<endouttext />'; }
1.34 albertel 452: return $result;
453: }
454: sub end_endouttext {
1.40 albertel 455: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.35 albertel 456: my @result=('','');
457: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
458: return (@result);
1.34 albertel 459: }
1.45 albertel 460: sub delete_startouttext {
461: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
462: # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
463: my $text=$$parser['-1']->get_text("/endouttext");
464: my $token=$$parser['-1']->get_token();
465: &Apache::lonxml::debug("Deleting :$text: and :$token->[0]:$token->[1]:$token->[2]: for startouttext");
466: &Apache::lonxml::end_tag($tagstack,$parstack,$token);
467: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
468: # they did the last time round
469: &Apache::lonxml::increasedepth($token);
470: &Apache::lonxml::decreasedepth($token);
471: return 1;
472: }
1.34 albertel 473:
1.1 albertel 474: 1;
475: __END__
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