Annotation of loncom/homework/structuretags.pm, revision 1.48
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 $body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '.
! 46: 'onUnload="'.&Apache::lonxml::unloadevents().'" '.
! 47: 'bgcolor="#FFFFFF">';
! 48: return ($result,$head_tag_start,$body_tag_start);
! 49: }
! 50:
1.9 albertel 51: sub start_problem {
1.40 albertel 52: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19 albertel 53:
54: #intialize globals
55: $Apache::inputtags::part='0';
56: @Apache::inputtags::responselist = ();
1.42 albertel 57: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
58: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
59: if ($Apache::lonhomework::type eq '') {
60: $Apache::lonhomework::type='homework';
61: }
1.19 albertel 62: #adeed vars to the scripting enviroment
63: my $expression='$external::part='.$Apache::inputtags::part.';';
64: &Apache::run::run($expression,$safeeval);
1.22 albertel 65: my $status;
66: my $datemsg;
1.36 albertel 67:
1.41 albertel 68: #should get back a <html> or the neccesary stuff to start XML/MathML
1.48 ! albertel 69: my ($result,$head_tag_start,$body_tag_start)=
! 70: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
1.36 albertel 71:
1.34 albertel 72: if ($target eq 'web' || $target eq 'grade') {
1.22 albertel 73: ($status,$datemsg) = &Apache::lonhomework::check_date('0');
74: push (@Apache::inputtags::status,$status);
1.24 albertel 75: my $expression='$external::datestatus="'.$status.'";';
76: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
77: &Apache::run::run($expression,$safeeval);
1.22 albertel 78: if ( $status eq 'CLOSED' ) {
1.21 albertel 79: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
80: if ( $target eq "web" ) {
1.41 albertel 81: $result.= $head_tag_start.'</head>';
82: return $result . $body_tag_start .
83: " <br />Problem is not open to be viewed. The problem $datemsg<br />";
1.21 albertel 84: }
1.41 albertel 85: }
1.21 albertel 86: }
1.19 albertel 87: if ($target eq 'web') {
1.39 albertel 88: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
1.30 albertel 89: if ($name eq '') {
90: $name=&Apache::lonnet::EXT('resource.title');
91: if ($name eq 'con_lost') { $name = ''; }
92: }
93: $Apache::lonhomework::name=$name;
1.22 albertel 94: if ($status eq 'CAN_ANSWER') {
95: # create a page header and exit
1.41 albertel 96: $result.="$head_tag_start<title>$name</title></head>\n
97: $body_tag_start\n
1.36 albertel 98: <form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".
99: '<input type="hidden" name="submitted" value="yes" />';
100: if ($ENV{'request.state'} eq "construct") {
101: $result.='<input type="hidden" name="problemmode" value="View" />
102: <input type="submit" name="problemmode" value="Edit" /><hr />';
103: }
104: return $result;
1.29 albertel 105: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' || $status eq 'CLOSED') {
1.41 albertel 106: return $result.$head_tag_start."<title>$name</title></head>\n$body_tag_start\n";
1.22 albertel 107: }
108: }
1.34 albertel 109: if ($target eq 'edit') {
1.41 albertel 110: $result.=$head_tag_start."</head>".$body_tag_start.
111: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
112: <input type="hidden" name="submitted" value="edit" />
113: <input type="hidden" name="problemmode" value="Edit" />
114: <input type="submit" name="problemmode" value="View" />
115: <input type="submit" name="Undo" value="undo" /> <hr />
116: ';
1.39 albertel 117: my $temp=&Apache::edit::insertlist($target,$token);
1.36 albertel 118: $result.=$temp;
119: return $result;
1.34 albertel 120: }
1.37 albertel 121: if ($target eq 'modified') {
122: $result=$token->[4];
123: $result.=&Apache::edit::handle_insert();
124: return $result;
125: }
1.19 albertel 126: return '';
1.9 albertel 127: }
128:
129: sub end_problem {
1.40 albertel 130: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.16 albertel 131: my $result='';
1.24 albertel 132: my $status=$Apache::inputtags::status['-1'];
1.40 albertel 133: if ($target eq 'grade' || $target eq 'web' ) {
1.28 albertel 134: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
135: $status eq 'CAN_ANSWER') {
1.19 albertel 136: # if part is zero, no <part>s existed, so we need to the grading
137: &Apache::inputtags::grade;
138: } elsif ($Apache::inputtags::part eq '0') {
139: # if part is zero, no <part>s existed, so we need show the current
140: # grading status
1.20 albertel 141: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
1.41 albertel 142: }
1.22 albertel 143: if ($target eq 'web') {
144: if ($status eq 'CAN_ANSWER') {
145: $result.="</form></body>\n";
1.28 albertel 146: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER') {
1.41 albertel 147: $result.="</body>\n";
148: }
1.22 albertel 149: }
1.41 albertel 150: }
1.34 albertel 151: if ($target eq 'meta') {
1.18 albertel 152: if ($Apache::inputtags::part eq '0') {
1.16 albertel 153: $result=&Apache::response::mandatory_part_meta;
154: }
155: }
1.34 albertel 156: if ($target eq 'edit') {
157: &Apache::lonxml::debug("in end_problem with $target, edit");
1.48 ! albertel 158: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
! 159: }
! 160: return $result;
! 161: }
! 162:
! 163: sub start_library {
! 164: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
! 165: my ($result,$head_tag_start,$body_tag_start)=
! 166: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
! 167: if ($target eq 'edit') {
! 168: $result.=$head_tag_start."</head>".$body_tag_start.
! 169: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
! 170: <input type="hidden" name="submitted" value="edit" />
! 171: <input type="hidden" name="problemmode" value="Edit" />
! 172: <input type="submit" name="problemmode" value="View" />
! 173: <input type="submit" name="Undo" value="undo" /> <hr />
! 174: ';
! 175: my $temp=&Apache::edit::insertlist($target,$token);
! 176: $result.=$temp;
! 177: return $result;
! 178: }
! 179: if ($target eq 'modified') {
! 180: $result=$token->[4];
! 181: $result.=&Apache::edit::handle_insert();
! 182: return $result;
! 183: }
! 184: return '';
! 185: }
! 186:
! 187: sub end_library {
! 188: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
! 189: my $result='';
! 190: if ($target eq 'edit') {
1.34 albertel 191: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
192: }
1.16 albertel 193: return $result;
1.1 albertel 194: }
195:
196: sub start_block {
1.40 albertel 197: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.1 albertel 198:
1.38 albertel 199: if ($target eq 'web' || $target eq 'grade') {
200: my $code = @$parstack[$#$parstack];
201: $code =~ s/\"//g;
202: $code .=';return $condition;';
203: # print "<br />$code<br />";
204: my $result = &Apache::run::run($code,$safeeval);
205: &Apache::lonxml::debug("block :$code: returned :$result:");
206: if ( ! $result ) {
207: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
208: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
209: }
1.1 albertel 210: }
211: return "";
212: }
213:
214: sub end_block {
1.38 albertel 215: return '';
1.4 tsai 216: }
217:
218: sub start_while {
1.40 albertel 219: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.4 tsai 220:
221: my $code = @$parstack[$#$parstack];
222: $code =~ s/\"//g;
223: $code .=';return $condition;';
224:
1.5 tsai 225: push( @Apache::structuretags::whileconds, $code);
1.4 tsai 226: my $result = &Apache::run::run($code,$safeeval);
227: my $bodytext=$$parser[$#$parser]->get_text("/while");
1.5 tsai 228: push( @Apache::structuretags::whilebody, $bodytext);
229: if ( $result ) {
1.8 albertel 230: &Apache::lonxml::newparser($parser,\$bodytext);
1.4 tsai 231: }
232: return "";
233: }
234:
235: sub end_while {
1.40 albertel 236: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.5 tsai 237: my $code = pop @Apache::structuretags::whileconds;
238: my $bodytext = pop @Apache::structuretags::whilebody;
239: my $result = &Apache::run::run($code,$safeeval);
240: if ( $result ) {
1.8 albertel 241: &Apache::lonxml::newparser($parser,\$bodytext);
1.5 tsai 242: }
243: return "";
1.1 albertel 244: }
1.6 tsai 245:
246: # <randomlist>
247: # <tag1>..</tag1>
248: # <tag2>..</tag2>
249: # <tag3>..</tag3>
250: # ...
251: # </randomlist>
252: sub start_randomlist {
1.40 albertel 253: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.9 albertel 254: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
1.6 tsai 255: my $b_parser= HTML::TokeParser->new(\$body);
256: my $b_tok;
257: my @randomlist;
258: my $list_item;
259:
260: while($b_tok = $b_parser->get_token() ) {
261: if($b_tok->[0] eq 'S') { # start tag
262: # get content of the tag until matching end tag
263: # get all text upto the matching tag
264: # and push the content into @randomlist
1.9 albertel 265: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
1.7 tsai 266: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
1.6 tsai 267: push(@randomlist,$list_item);
1.32 albertel 268: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
1.6 tsai 269: }
270: if($b_tok->[0] eq 'T') { # text
271: # what to do with text in between tags?
1.32 albertel 272: # print "<b>TEXT $b_tok->[1]</b><br />";
1.6 tsai 273: }
274: # if($b_tok->[0] eq 'E') { # end tag, should not happen
1.32 albertel 275: # print "<b>END-TAG $b_tok->[1]</b><br />";
1.6 tsai 276: # }
277: }
1.7 tsai 278: my @idx_arr = (0 .. $#randomlist);
279: &Apache::structuretags::shuffle(\@idx_arr);
280: my $bodytext = '';
281: for(0 .. $#randomlist) {
282: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
283: }
1.8 albertel 284:
285: &Apache::lonxml::newparser($parser,\$bodytext);
1.6 tsai 286: return "";
1.7 tsai 287: }
288:
289: sub shuffle {
290: my $a=shift;
291: my $i;
292: for($i=@$a;--$i;) {
293: my $j=int rand($i+1);
294: next if $i == $j;
295: @$a[$i,$j] = @$a[$j,$i];
296: }
1.6 tsai 297: }
298:
299: sub end_randomlist {
1.46 albertel 300: return '';
1.6 tsai 301: }
302:
1.11 albertel 303: sub start_part {
1.40 albertel 304: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.39 albertel 305: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1.47 albertel 306: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
1.14 albertel 307: $Apache::inputtags::part=$id;
1.18 albertel 308: @Apache::inputtags::responselist = ();
1.15 www 309: if ($target eq 'meta') {
1.16 albertel 310: return &Apache::response::mandatory_part_meta;
1.37 albertel 311: } elsif ($target eq 'web' || $target eq 'grade') {
1.47 albertel 312: my ($status,$datemsg) = &Apache::lonhomework::check_date($id);
1.23 albertel 313: push (@Apache::inputtags::status,$status);
314: my $expression='$external::datestatus="'.$status.'";';
315: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
316: &Apache::run::run($expression,$safeeval);
317: if ( $status eq 'CLOSED' ) {
1.21 albertel 318: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
319: if ( $target eq "web" ) {
1.32 albertel 320: return "<br />Part is not open to be viewed. It $datemsg<br />";
1.21 albertel 321: }
322: }
1.15 www 323: }
1.19 albertel 324: return '';
1.11 albertel 325: }
326:
327: sub end_part {
1.40 albertel 328: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.18 albertel 329: &Apache::lonxml::debug("in end_part $target ");
1.28 albertel 330: my $status=$Apache::inputtags::status['-1'];
1.23 albertel 331: pop @Apache::inputtags::status;
1.19 albertel 332: if ( $target eq 'meta' ) { return ''; }
1.37 albertel 333: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
334: return &Apache::inputtags::grade;
1.28 albertel 335: }
1.37 albertel 336: if ($target eq 'web') {
337: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
338: }
339: return '';
1.11 albertel 340: }
1.1 albertel 341:
1.25 albertel 342: sub start_preduedate {
1.40 albertel 343: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 344: if ($target eq 'web' || $target eq 'grade') {
1.29 albertel 345: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
346: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
1.26 albertel 347: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
1.24 albertel 348: }
349: }
350: return '';
351: }
352:
1.25 albertel 353: sub end_preduedate {
1.24 albertel 354: return '';
355: }
356:
1.25 albertel 357: sub start_postanswerdate {
1.40 albertel 358: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 359: if ($target eq 'web' || $target eq 'grade') {
1.24 albertel 360: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1.26 albertel 361: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
1.24 albertel 362: }
363: }
364: return '';
365: }
366:
1.25 albertel 367: sub end_postanswerdate {
1.24 albertel 368: return '';
369: }
370:
1.25 albertel 371: sub start_notsolved {
1.40 albertel 372: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 373: if ($target eq 'web' || $target eq 'grade') {
1.24 albertel 374: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
375: &Apache::lonxml::debug("not solved has :$gradestatus:");
376: if ($gradestatus =~ /^correct/) {
377: &Apache::lonxml::debug("skipping");
1.26 albertel 378: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
1.24 albertel 379: }
380: }
381: return '';
382: }
383:
1.25 albertel 384: sub end_notsolved {
1.24 albertel 385: return '';
386: }
387:
388: sub start_solved {
1.40 albertel 389: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 390: if ($target eq 'web' || $target eq 'grade') {
1.24 albertel 391: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
392: if ($gradestatus !~ /^correct/) {
393: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
394: }
395: }
396: return '';
397: }
398:
399: sub end_solved {
400: return '';
401: }
1.34 albertel 402:
403: sub start_startouttext {
1.40 albertel 404: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.35 albertel 405: my @result=(''.'');
406: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
407: return (@result);
1.34 albertel 408: }
409: sub end_startouttext {
1.40 albertel 410: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 411: my $result='';
1.35 albertel 412: my $text='';
413:
1.34 albertel 414: if ($target eq 'edit') {
1.35 albertel 415: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[$#$parser]);
1.43 albertel 416: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1.42 albertel 417: <td>Delete:".
418: &Apache::edit::deletelist($target,$token)
419: ."</td>
420: <td>".
421: &Apache::edit::insertlist($target,$token).
422: "</td>
423: </tr><tr><td colspan=\"3\">\n".
1.45 albertel 424: &Apache::edit::editfield($token->[1],$text,"",50,4);
1.35 albertel 425: }
426: if ($target eq 'modified') {
427: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
428: $result='<startouttext />'.&Apache::edit::modifiedfield();
1.34 albertel 429: }
430: return $result;
431: }
432: sub start_endouttext {
1.40 albertel 433: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 434: my $result='';
1.43 albertel 435: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
1.35 albertel 436: if ($target eq "modified") { $result='<endouttext />'; }
1.34 albertel 437: return $result;
438: }
439: sub end_endouttext {
1.40 albertel 440: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.35 albertel 441: my @result=('','');
442: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
443: return (@result);
1.34 albertel 444: }
1.45 albertel 445: sub delete_startouttext {
446: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
447: # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
448: my $text=$$parser['-1']->get_text("/endouttext");
449: my $token=$$parser['-1']->get_token();
450: &Apache::lonxml::debug("Deleting :$text: and :$token->[0]:$token->[1]:$token->[2]: for startouttext");
451: &Apache::lonxml::end_tag($tagstack,$parstack,$token);
452: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
453: # they did the last time round
454: &Apache::lonxml::increasedepth($token);
455: &Apache::lonxml::decreasedepth($token);
456: return 1;
457: }
1.34 albertel 458:
1.1 albertel 459: 1;
460: __END__
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