Annotation of loncom/homework/structuretags.pm, revision 1.102
1.34 albertel 1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
1.74 albertel 3: #
1.102 ! sakharuk 4: # $Id: structuretags.pm,v 1.101 2002/07/03 15:36:40 sakharuk Exp $
1.74 albertel 5: #
6: # Copyright Michigan State University Board of Trustees
7: #
8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
9: #
10: # LON-CAPA is free software; you can redistribute it and/or modify
11: # it under the terms of the GNU General Public License as published by
12: # the Free Software Foundation; either version 2 of the License, or
13: # (at your option) any later version.
14: #
15: # LON-CAPA is distributed in the hope that it will be useful,
16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18: # GNU General Public License for more details.
19: #
20: # You should have received a copy of the GNU General Public License
21: # along with LON-CAPA; if not, write to the Free Software
22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23: #
24: # /home/httpd/html/adm/gpl.txt
25: #
26: # http://www.lon-capa.org/
27: #
1.33 albertel 28: # 2/19 Guy
1.44 ng 29: # 6/26/2001 fixed extra web display at end of <web></web> tags
1.60 www 30: # 8/17,8/18,8/20 Gerd Kortemeyer
1.54 www 31:
1.1 albertel 32: package Apache::structuretags;
33:
34: use strict;
35: use Apache::lonnet;
1.101 sakharuk 36: use Apache::File();
1.1 albertel 37:
1.78 harris41 38: BEGIN {
1.48 albertel 39: &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
1.37 albertel 40: # &Apache::lonxml::register_insert('problem','',('part','postanswerdate','preduedate'))
1.10 albertel 41: }
42:
43: sub start_web {
1.40 albertel 44: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.10 albertel 45: my $bodytext=&Apache::lonxml::get_all_text("/web",$$parser[$#$parser]);
1.19 albertel 46: if ($target eq 'web') {
47: return $bodytext;
48: }
49: return '';
1.10 albertel 50: }
51:
52: sub end_web {
1.44 ng 53: return '';
1.10 albertel 54: }
55:
56: sub start_tex {
1.40 albertel 57: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.10 albertel 58: my $bodytext=&Apache::lonxml::get_all_text("/tex",$$parser[$#$parser]);
1.19 albertel 59: if ($target eq 'tex') {
1.102 ! sakharuk 60: return $bodytext.' ';
1.19 albertel 61: }
1.10 albertel 62: return '';
63: }
64:
65: sub end_tex {
1.44 ng 66: return '';
1.9 albertel 67: }
68:
1.48 albertel 69: sub page_start {
70: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.79 albertel 71: my %found;
72: foreach my $taginside ($tagstack) {
73: foreach my $taglookedfor ('html','body','form') {
74: if ($taginside =~ /^$taglookedfor$/i) { $found{$taglookedfor} = 1; }
75: }
76: }
77:
78: my $result;
79: my $head_tag_start;
80: if (!defined($found{'html'})) {
81: $result=&Apache::londefdef::start_html($target,$token,$tagstack,$parstack,
82: $parser,$safeeval);
1.84 matthew 83: $head_tag_start='<head>'.&Apache::lonxml::registerurl(undef,$target);
1.79 albertel 84: }
85: my $body_tag_start;
86: if (!defined($found{'body'})) {
1.80 albertel 87: $body_tag_start='<body onLoad="'.&Apache::lonxml::loadevents().'" '.
1.79 albertel 88: 'onUnload="'.&Apache::lonxml::unloadevents().'" ';
89: my $background=&Apache::lonxml::get_param('background',$parstack,$safeeval);
90: if ($background) {
91: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
92: $background;
93: $body_tag_start.='background="'.$background.'" ';
1.50 albertel 94: } else {
1.79 albertel 95: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,$safeeval);
96: if ($bgcolor) {
97: $body_tag_start.='bgcolor="'.$bgcolor.'" ';
98: } else {
99: $body_tag_start.='bgcolor="#ffffff"';
100: }
1.50 albertel 101: }
1.79 albertel 102: $body_tag_start.='>';
1.50 albertel 103: }
1.48 albertel 104: return ($result,$head_tag_start,$body_tag_start);
105: }
106:
1.65 albertel 107: sub initialize_storage {
108: %Apache::lonhomework::results=();
1.66 albertel 109: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.67 albertel 110: if ($ENV{'request.state'} eq 'construct') {
111: %Apache::lonhomework::history=
1.72 albertel 112: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
1.67 albertel 113: my ($temp)=keys %Apache::lonhomework::history ;
114: &Apache::lonxml::debug("Return message of $temp");
115: } else {
116: %Apache::lonhomework::history=
117: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
118: }
1.65 albertel 119: #ignore error conditions
120: my ($temp)=keys %Apache::lonhomework::history ;
121: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
122: }
123:
124: # -------------------------------------------------------------finalize_storage
125: # Stores away the result has to a student's environment
126: # checks form.grade_ for specific values, other wises stores
127: # to the running users environment
128: sub finalize_storage {
129: my $result;
130: my ($temp) = keys %Apache::lonhomework::results;
131: if ( $temp ne '' ) {
1.66 albertel 132: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.67 albertel 133: if ($ENV{'request.state'} eq 'construct') {
1.72 albertel 134: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
135: $ENV{'request.uri'},'',$domain,$name);
1.67 albertel 136: &Apache::lonxml::debug('Construct Store return message:'.$result);
137: } else {
138: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
139: $symb,$courseid,$domain,$name);
140: &Apache::lonxml::debug('Store return message:'.$result);
141: }
1.65 albertel 142: }
143: return $result;
144: }
145:
146: sub checkout_msg {
147: return (<<ENDCHECKOUT);
148: <h2>The resource needs to be checked out</h2>
149: As a resource gets checked out, a unique timestamped ID is given to it, and a
150: permanent record is left in the system.<p />
151: <font color=red>
152: Checking out resources is subject to course policies, and may exclude future
153: credit even if done erroneously.<p />
1.91 albertel 154: </font>
155: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
156: <input type="hidden" name="doescheckout" value="yes" />
157: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
1.65 albertel 158: </form>
159: ENDCHECKOUT
160: }
161:
1.9 albertel 162: sub start_problem {
1.40 albertel 163: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19 albertel 164:
1.81 albertel 165: # meta is called from lonpublisher, which doesn't uses the normal
166: # lonhomework method of parsing the file which means that inputtags
167: # won't get reset
168: if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
1.79 albertel 169: &Apache::lonxml::error('Only one problem allowed in a .problem file');
170: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[-1]);
171: return '';
172: }
1.19 albertel 173: #intialize globals
174: $Apache::inputtags::part='0';
175: @Apache::inputtags::responselist = ();
1.51 albertel 176: @Apache::inputtags::previous=();
1.87 albertel 177: if ($target ne 'analyze') {
178: &initialize_storage();
179: if ($target eq 'web') {
180: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
181: }
182: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
183: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.73 albertel 184: }
1.42 albertel 185: if ($Apache::lonhomework::type eq '') {
1.53 albertel 186: my $uri=$ENV{'request.uri'};
187: if ($uri=~/\.(\w+)$/) {
188: $Apache::lonhomework::type=$1;
189: &Apache::lonxml::debug("Using type of $1");
190: } else {
191: $Apache::lonhomework::type='problem';
192: &Apache::lonxml::debug("Using default type, problem, :$uri:");
193: }
1.42 albertel 194: }
1.58 www 195:
1.67 albertel 196: #added vars to the scripting enviroment
1.19 albertel 197: my $expression='$external::part='.$Apache::inputtags::part.';';
198: &Apache::run::run($expression,$safeeval);
1.22 albertel 199: my $status;
1.55 www 200: my $accessmsg;
1.36 albertel 201:
1.41 albertel 202: #should get back a <html> or the neccesary stuff to start XML/MathML
1.48 albertel 203: my ($result,$head_tag_start,$body_tag_start)=
204: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
1.96 sakharuk 205: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) { $result = '';}
1.67 albertel 206:
1.98 sakharuk 207: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
1.67 albertel 208: #handle exam checkout
209: if ($Apache::lonhomework::type eq 'exam') {
210: my $token=$Apache::lonhomework::history{"resource.0.outtoken"};
211: if (($ENV{'form.doescheckout'}) && (!$token)) {
212: $token=&Apache::lonxml::maketoken();
213: $Apache::lonhomework::history{"resource.0.outtoken"}=$token;
214: }
215: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
216: }
217:
218: #handle rand seed in construction space
219: my $rndseed;
220: if ($ENV{'request.state'} eq "construct") {
221: $rndseed=$ENV{'form.rndseed'};
222: if (!$rndseed) {
223: $rndseed=time;
224: $ENV{'form.rndseed'}=$rndseed;
1.58 www 225: }
1.67 albertel 226: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
227: }
1.55 www 228: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
1.22 albertel 229: push (@Apache::inputtags::status,$status);
1.24 albertel 230: my $expression='$external::datestatus="'.$status.'";';
231: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
232: &Apache::run::run($expression,$safeeval);
1.54 www 233: if (( $status eq 'CLOSED' ) ||
234: ( $status eq 'UNCHECKEDOUT') ||
235: ( $status eq 'BANNED')) {
1.21 albertel 236: my $bodytext=&Apache::lonxml::get_all_text("/problem",$$parser[$#$parser]);
237: if ( $target eq "web" ) {
1.41 albertel 238: $result.= $head_tag_start.'</head>';
1.54 www 239: my $msg=$body_tag_start.
240: '<h1>Not open to be viewed</h1>';
241: if ($status eq 'CLOSED') {
1.55 www 242: $msg.='The problem '.$accessmsg;
1.54 www 243: } elsif ($status eq 'UNCHECKEDOUT') {
1.65 albertel 244: $msg.=&checkout_msg;
1.54 www 245: }
1.67 albertel 246: $result.=$msg.'<br />';
247: }
248: } elsif ($target eq 'web') {
249: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
250: if ($name eq '') {
251: $name=&Apache::lonnet::EXT('resource.title');
252: if ($name eq 'con_lost') { $name = ''; }
1.21 albertel 253: }
1.67 albertel 254: $Apache::lonhomework::name=$name;
255: if ($status eq 'CAN_ANSWER') {
256: # create a page header and exit
257: $result.="$head_tag_start<title>$name</title></head>\n
1.41 albertel 258: $body_tag_start\n
1.36 albertel 259: <form name=\"lonhomework\" method=\"POST\" action=\"".$ENV{'request.uri'}."\">".
260: '<input type="hidden" name="submitted" value="yes" />';
1.67 albertel 261: if ($ENV{'request.state'} eq "construct") {
262: $result.=
263: '<input type="hidden" name="problemmode" value="View" />
264: <input type="submit" name="problemmode" value="Edit" />
1.73 albertel 265: <input type="submit" name="problemmode" value="EditXML" />
1.67 albertel 266: Random Seed:<input type="text" name="rndseed" width="10" value="'.
1.72 albertel 267: $rndseed.'" />
1.73 albertel 268: <input type="submit" name="changerandseed" value="Change" />
1.72 albertel 269: <input type="submit" name="resetdata" value="Reset Submissions" />
1.93 albertel 270: <input type="checkbox" name="showallfoils" ';
271: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
272: $result.= ' /> Show All Foils
1.72 albertel 273: <hr />';
1.67 albertel 274: }
275: # if we are viewing someone else preserve that info
276: if (defined $ENV{'form.grade_symb'}) {
277: foreach my $field ('symb','courseid','domain','username') {
278: $result .= '<input type="hidden" name="grade_'.$field.
279: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
280: }
1.65 albertel 281: }
1.67 albertel 282: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
283: || $status eq 'CLOSED') {
284: $result.=$head_tag_start.
285: "<title>$name</title></head>\n$body_tag_start\n";
1.65 albertel 286: }
1.99 sakharuk 287: } elsif ($target eq 'tex') {
288: my $id = $Apache::inputtags::part;
289: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
290: $duedate = POSIX::strftime("%c",localtime($duedate));
1.101 sakharuk 291: my $temp_file;
292: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
293: if (-e $filename) {
294: $temp_file = Apache::File->new($filename);
1.99 sakharuk 295: } else {
1.101 sakharuk 296: $temp_file = Apache::File->new('>>'.$filename);
297: }
298: my @due_file_content = <$temp_file>;
299: my $due_file_content = $due_file_content[$#due_file_content];
300: chomp $due_file_content;
301: if ($due_file_content ne $duedate) {
302: $temp_file = Apache::File->new('>'.$filename);
1.102 ! sakharuk 303: print $temp_file "$duedate\n";
! 304: if($duedate eq 'Wed 31 Dec 1969 07:00:00 PM EDT') {$duedate = '';}
1.101 sakharuk 305: if (not $ENV{'request.symb'} =~ m/\.page_/) {
306: $result .= '\begin{document} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm';
307: } else {
308: $result .= '\parbox{\minipagewidth}{\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
309: }
310: } else {
311: if (not $ENV{'request.symb'} =~ m/\.page_/) {
312: $result .= '\begin{document} \noindent \vskip 1 mm';
313: } else {
314: $result .= '\parbox{\minipagewidth}{\vskip 1mm \\\\\\\\';
315: }
1.99 sakharuk 316: }
317: }
1.67 albertel 318: } elsif ($target eq 'edit') {
1.41 albertel 319: $result.=$head_tag_start."</head>".$body_tag_start.
1.67 albertel 320: '<form name="lonhomework" method="POST" action="'.
321: $ENV{'request.uri'}.'">
1.41 albertel 322: <input type="hidden" name="submitted" value="edit" />
323: <input type="hidden" name="problemmode" value="Edit" />
1.97 albertel 324: <input type="submit" name="problemmode" value="Discard Edits and View" />
1.73 albertel 325: <input type="submit" name="problemmode" value="EditXML" />
1.41 albertel 326: <input type="submit" name="Undo" value="undo" /> <hr />
1.97 albertel 327: <input type="submit" name="submit" value="Submit Changes" />
328: <input type="submit" name="submit" value="Submit Changes and View" /><br />
1.41 albertel 329: ';
1.39 albertel 330: my $temp=&Apache::edit::insertlist($target,$token);
1.36 albertel 331: $result.=$temp;
1.67 albertel 332: } elsif ($target eq 'modified') {
1.37 albertel 333: $result=$token->[4];
334: $result.=&Apache::edit::handle_insert();
1.67 albertel 335: } else {
336: # page_start returned a starting result, delete it if we don't need it
337: $result = '';
1.37 albertel 338: }
1.67 albertel 339: return $result;
1.9 albertel 340: }
341:
342: sub end_problem {
1.40 albertel 343: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.16 albertel 344: my $result='';
1.24 albertel 345: my $status=$Apache::inputtags::status['-1'];
1.68 albertel 346: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ) {
1.83 albertel 347: if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.19 albertel 348: # if part is zero, no <part>s existed, so we need to the grading
349: &Apache::inputtags::grade;
1.91 albertel 350: } elsif ( $target eq 'web' && $Apache::inputtags::part eq '0' &&
351: $status ne 'UNCHECKEDOUT') {
1.19 albertel 352: # if part is zero, no <part>s existed, so we need show the current
353: # grading status
1.20 albertel 354: $result.= &Apache::inputtags::gradestatus($Apache::inputtags::part);
1.41 albertel 355: }
1.68 albertel 356: if (
357: ($target eq 'web' && ($ENV{'request.state'} ne 'construct')) ||
358: ($target eq 'answer')
359: ) {
1.22 albertel 360: if ($status eq 'CAN_ANSWER') {
361: $result.="</form></body>\n";
1.91 albertel 362: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
363: $status eq 'UNCHECKEDOUT' ) {
1.41 albertel 364: $result.="</body>\n";
365: }
1.50 albertel 366: $result.=&Apache::lonxml::xmlend();
1.22 albertel 367: }
1.65 albertel 368: if ($target eq 'grade') {
369: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
370: &finalize_storage();
371: }
372: } elsif ($target eq 'meta') {
1.18 albertel 373: if ($Apache::inputtags::part eq '0') {
1.16 albertel 374: $result=&Apache::response::mandatory_part_meta;
375: }
1.65 albertel 376: } elsif ($target eq 'edit') {
1.34 albertel 377: &Apache::lonxml::debug("in end_problem with $target, edit");
1.97 albertel 378: $result ='<br /><input type="submit" name="submit" value="Submit Changes and Edit" />';
379: $result.='<input type="submit" name="submit" value="Submit Changes and View" />';
1.77 sakharuk 380: } elsif ($target eq 'tex') {
1.101 sakharuk 381: $result .= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.96 sakharuk 382: if (not $ENV{'request.symb'} =~ m/\.page_/) {
383: $result .= '\end{document} ';
384: } else {
1.100 sakharuk 385: $result .= '} ';
1.96 sakharuk 386: }
1.48 albertel 387: }
388: return $result;
389: }
390:
391: sub start_library {
392: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
393: my ($result,$head_tag_start,$body_tag_start)=
394: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
395: if ($target eq 'edit') {
396: $result.=$head_tag_start."</head>".$body_tag_start.
397: '<form name="lonhomework" method="POST" action="'.$ENV{'request.uri'}.'">
398: <input type="hidden" name="submitted" value="edit" />
399: <input type="hidden" name="problemmode" value="Edit" />
400: <input type="submit" name="problemmode" value="View" />
401: <input type="submit" name="Undo" value="undo" /> <hr />
402: ';
403: my $temp=&Apache::edit::insertlist($target,$token);
404: $result.=$temp;
405: return $result;
406: }
407: if ($target eq 'modified') {
408: $result=$token->[4];
409: $result.=&Apache::edit::handle_insert();
410: return $result;
411: }
412: return '';
413: }
414:
415: sub end_library {
416: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
417: my $result='';
418: if ($target eq 'edit') {
1.34 albertel 419: $result='<br /><input type="submit" name="submit" value="Submit Changes" />';
420: }
1.16 albertel 421: return $result;
1.1 albertel 422: }
423:
424: sub start_block {
1.40 albertel 425: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.1 albertel 426:
1.68 albertel 427: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
1.38 albertel 428: my $code = @$parstack[$#$parstack];
429: $code =~ s/\"//g;
430: $code .=';return $condition;';
431: # print "<br />$code<br />";
432: my $result = &Apache::run::run($code,$safeeval);
433: &Apache::lonxml::debug("block :$code: returned :$result:");
434: if ( ! $result ) {
435: my $skip=&Apache::lonxml::get_all_text("/block",$$parser[$#$parser]);
436: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[$#$parser]");
437: }
1.1 albertel 438: }
439: return "";
440: }
441:
442: sub end_block {
1.38 albertel 443: return '';
1.4 tsai 444: }
445:
446: sub start_while {
1.40 albertel 447: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.4 tsai 448:
449: my $code = @$parstack[$#$parstack];
450: $code =~ s/\"//g;
451: $code .=';return $condition;';
452:
1.5 tsai 453: push( @Apache::structuretags::whileconds, $code);
1.4 tsai 454: my $result = &Apache::run::run($code,$safeeval);
455: my $bodytext=$$parser[$#$parser]->get_text("/while");
1.5 tsai 456: push( @Apache::structuretags::whilebody, $bodytext);
457: if ( $result ) {
1.8 albertel 458: &Apache::lonxml::newparser($parser,\$bodytext);
1.4 tsai 459: }
460: return "";
461: }
462:
463: sub end_while {
1.40 albertel 464: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.5 tsai 465: my $code = pop @Apache::structuretags::whileconds;
466: my $bodytext = pop @Apache::structuretags::whilebody;
467: my $result = &Apache::run::run($code,$safeeval);
468: if ( $result ) {
1.8 albertel 469: &Apache::lonxml::newparser($parser,\$bodytext);
1.5 tsai 470: }
471: return "";
1.1 albertel 472: }
1.6 tsai 473:
474: # <randomlist>
475: # <tag1>..</tag1>
476: # <tag2>..</tag2>
477: # <tag3>..</tag3>
478: # ...
479: # </randomlist>
480: sub start_randomlist {
1.40 albertel 481: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.86 albertel 482: my $result;
1.71 albertel 483: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web') {
484: my $body= &Apache::lonxml::get_all_text("/randomlist",$$parser[$#$parser]);
485: my $b_parser= HTML::TokeParser->new(\$body);
486: my $b_tok;
487: my @randomlist;
488: my $list_item;
489: while($b_tok = $b_parser->get_token() ) {
490: if($b_tok->[0] eq 'S') { # start tag
491: # get content of the tag until matching end tag
492: # get all text upto the matching tag
493: # and push the content into @randomlist
494: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],$b_parser);
495: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
496: push(@randomlist,$list_item);
497: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4], $list_item</b>";
498: }
499: if($b_tok->[0] eq 'T') { # text
500: # what to do with text in between tags?
501: # print "<b>TEXT $b_tok->[1]</b><br />";
502: }
503: # if($b_tok->[0] eq 'E') { # end tag, should not happen
504: # print "<b>END-TAG $b_tok->[1]</b><br />";
505: # }
506: }
507: my @idx_arr = (0 .. $#randomlist);
508: &Apache::structuretags::shuffle(\@idx_arr);
509: my $bodytext = '';
1.86 albertel 510: my $show=$#randomlist;
511: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
512: $showarg--;
513: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
514: for(0 .. $show) {
1.71 albertel 515: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
1.6 tsai 516: }
1.71 albertel 517: &Apache::lonxml::newparser($parser,\$bodytext);
1.86 albertel 518: } elsif ($target eq 'edit' ) {
519: $result .= &Apache::edit::tag_start($target,$token);
520: $result .= &Apache::edit::text_arg('Maximum Tags to Show:','show',$token,5);
521: $result .= &Apache::edit::end_row().&Apache::edit::start_spanning_row();
522: } elsif ($target eq 'modified' ) {
523: my $constructtag=&Apache::edit::get_new_args($token,$parstack,$safeeval,
524: 'show');
525: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.7 tsai 526: }
1.86 albertel 527: return $result;
1.7 tsai 528: }
529:
530: sub shuffle {
531: my $a=shift;
532: my $i;
1.70 albertel 533: if (defined(@$a)) {
534: &Apache::response::setrandomnumber();
535: for($i=@$a;--$i;) {
536: my $j=int rand($i+1);
537: next if $i == $j;
538: @$a[$i,$j] = @$a[$j,$i];
539: }
1.7 tsai 540: }
1.6 tsai 541: }
542:
543: sub end_randomlist {
1.86 albertel 544: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
545: my $result;
546: if ($target eq 'edit' ) {
547: $result=&Apache::edit::tag_end($target,$token,'End Randomly Parsed Block');
548: }
549: return $result;
1.6 tsai 550: }
551:
1.11 albertel 552: sub start_part {
1.40 albertel 553: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.95 albertel 554: my $result='';
1.39 albertel 555: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1.47 albertel 556: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
1.14 albertel 557: $Apache::inputtags::part=$id;
1.18 albertel 558: @Apache::inputtags::responselist = ();
1.51 albertel 559: @Apache::inputtags::previous=();
1.15 www 560: if ($target eq 'meta') {
1.16 albertel 561: return &Apache::response::mandatory_part_meta;
1.95 albertel 562: } elsif ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
1.55 www 563: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
1.23 albertel 564: push (@Apache::inputtags::status,$status);
565: my $expression='$external::datestatus="'.$status.'";';
566: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
567: &Apache::run::run($expression,$safeeval);
568: if ( $status eq 'CLOSED' ) {
1.21 albertel 569: my $bodytext=&Apache::lonxml::get_all_text("/part",$$parser[$#$parser]);
570: if ( $target eq "web" ) {
1.95 albertel 571: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
572: } elsif ( $target eq 'tex' ) {
573: $result="\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\";
574: }
575: } else {
576: if ($target eq 'tex') {
577: $result='\vskip 0 mm';
1.21 albertel 578: }
579: }
1.15 www 580: }
1.95 albertel 581: return $result;
1.11 albertel 582: }
583:
584: sub end_part {
1.40 albertel 585: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.18 albertel 586: &Apache::lonxml::debug("in end_part $target ");
1.28 albertel 587: my $status=$Apache::inputtags::status['-1'];
1.23 albertel 588: pop @Apache::inputtags::status;
1.19 albertel 589: if ( $target eq 'meta' ) { return ''; }
1.37 albertel 590: if ( $target eq 'grade' && $status eq 'CAN_ANSWER') {
591: return &Apache::inputtags::grade;
1.28 albertel 592: }
1.37 albertel 593: if ($target eq 'web') {
594: return &Apache::inputtags::gradestatus($Apache::inputtags::part);
595: }
596: return '';
1.11 albertel 597: }
1.1 albertel 598:
1.25 albertel 599: sub start_preduedate {
1.40 albertel 600: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.68 albertel 601: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
1.29 albertel 602: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
603: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' ) {
1.26 albertel 604: &Apache::lonxml::get_all_text("/preduedate",$$parser[$#$parser]);
1.24 albertel 605: }
606: }
607: return '';
608: }
609:
1.25 albertel 610: sub end_preduedate {
1.24 albertel 611: return '';
612: }
613:
1.25 albertel 614: sub start_postanswerdate {
1.40 albertel 615: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 616: if ($target eq 'web' || $target eq 'grade') {
1.24 albertel 617: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1.26 albertel 618: &Apache::lonxml::get_all_text("/postanswerdate",$$parser[$#$parser]);
1.24 albertel 619: }
620: }
621: return '';
622: }
623:
1.25 albertel 624: sub end_postanswerdate {
1.24 albertel 625: return '';
626: }
627:
1.25 albertel 628: sub start_notsolved {
1.40 albertel 629: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.68 albertel 630: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
1.24 albertel 631: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
632: &Apache::lonxml::debug("not solved has :$gradestatus:");
633: if ($gradestatus =~ /^correct/) {
634: &Apache::lonxml::debug("skipping");
1.26 albertel 635: &Apache::lonxml::get_all_text("/notsolved",$$parser[$#$parser]);
1.24 albertel 636: }
637: }
638: return '';
639: }
640:
1.25 albertel 641: sub end_notsolved {
1.24 albertel 642: return '';
643: }
644:
645: sub start_solved {
1.40 albertel 646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.68 albertel 647: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer') {
1.24 albertel 648: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
649: if ($gradestatus !~ /^correct/) {
650: &Apache::lonxml::get_all_text("/solved",$$parser[$#$parser]);
651: }
652: }
653: return '';
654: }
655:
656: sub end_solved {
657: return '';
658: }
1.34 albertel 659:
660: sub start_startouttext {
1.40 albertel 661: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.35 albertel 662: my @result=(''.'');
663: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
664: return (@result);
1.34 albertel 665: }
666: sub end_startouttext {
1.40 albertel 667: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 668: my $result='';
1.35 albertel 669: my $text='';
670:
1.34 albertel 671: if ($target eq 'edit') {
1.70 albertel 672: $text=&Apache::lonxml::get_all_text("endouttext",$$parser[-1]);
1.43 albertel 673: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1.42 albertel 674: <td>Delete:".
675: &Apache::edit::deletelist($target,$token)
1.82 albertel 676: ."</td>
1.42 albertel 677: <td>".
678: &Apache::edit::insertlist($target,$token).
1.82 albertel 679: &Apache::edit::end_row().&Apache::edit::start_spanning_row()."\n".
680: &Apache::edit::editfield($token->[1],$text,"",50,4);
1.35 albertel 681: }
682: if ($target eq 'modified') {
683: $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
684: $result='<startouttext />'.&Apache::edit::modifiedfield();
1.85 sakharuk 685: }
686: if ($target eq 'tex') {
687: $result .= '\noindent ';
1.34 albertel 688: }
689: return $result;
690: }
691: sub start_endouttext {
1.40 albertel 692: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.34 albertel 693: my $result='';
1.43 albertel 694: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
1.35 albertel 695: if ($target eq "modified") { $result='<endouttext />'; }
1.34 albertel 696: return $result;
697: }
698: sub end_endouttext {
1.40 albertel 699: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.35 albertel 700: my @result=('','');
701: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
702: return (@result);
1.34 albertel 703: }
1.45 albertel 704: sub delete_startouttext {
705: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
706: # my $text=&Apache::lonxml::get_all_text("endouttext",$$parser['-1']);
707: my $text=$$parser['-1']->get_text("/endouttext");
1.69 albertel 708: my $ntoken=$$parser['-1']->get_token();
709: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
710: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
1.45 albertel 711: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
712: # they did the last time round
1.69 albertel 713: &Apache::lonxml::increasedepth($ntoken);
714: &Apache::lonxml::decreasedepth($ntoken);
1.45 albertel 715: return 1;
716: }
1.34 albertel 717:
1.1 albertel 718: 1;
719: __END__
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