Annotation of loncom/homework/structuretags.pm, revision 1.164
1.34 albertel 1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
1.74 albertel 3: #
1.164 ! albertel 4: # $Id: structuretags.pm,v 1.163 2003/04/03 21:08:33 albertel 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:
1.133 sakharuk 32:
1.1 albertel 33: package Apache::structuretags;
34:
35: use strict;
36: use Apache::lonnet;
1.101 sakharuk 37: use Apache::File();
1.147 www 38: use Apache::lonmenu;
1.1 albertel 39:
1.78 harris41 40: BEGIN {
1.159 albertel 41: &Apache::lonxml::register('Apache::structuretags',('block','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext'));
1.10 albertel 42: }
43:
44: sub start_web {
1.159 albertel 45: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
46: my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
47: if ($target eq 'web') {
48: return $bodytext;
49: }
50: return '';
1.10 albertel 51: }
52:
53: sub end_web {
1.44 ng 54: return '';
1.10 albertel 55: }
56:
57: sub start_tex {
1.159 albertel 58: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
59: my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
60: if ($target eq 'tex') {
61: return $bodytext.' ';
62: }
63: return '';
1.10 albertel 64: }
65:
66: sub end_tex {
1.44 ng 67: return '';
1.9 albertel 68: }
69:
1.48 albertel 70: sub page_start {
1.159 albertel 71: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
72: my %found;
73: foreach my $taginside ($tagstack) {
74: foreach my $taglookedfor ('html','body','form') {
75: if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
76: }
77: }
78:
79: my $result;
80: my $head_tag_start;
81: if (!defined($found{'html'})) {
82: $result=&Apache::londefdef::start_html($target,$token,$tagstack,
83: $parstack,$parser,$safeeval);
84: $head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target);
85: }
86: my $body_tag_start;
87: if (!defined($found{'body'})) {
88: $body_tag_start='<body onLoad="'.&Apache::lonmenu::loadevents().'" '.
89: 'onUnload="'.&Apache::lonmenu::unloadevents().'" ';
90: my $background=&Apache::lonxml::get_param('background',$parstack,
91: $safeeval);
92: if ($background) {
93: $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
94: $background;
95: $body_tag_start.='background="'.$background.'" ';
96: } else {
97: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
98: $safeeval);
99: if ($bgcolor) {
100: $body_tag_start.='bgcolor="'.$bgcolor.'" ';
101: } else {
102: $body_tag_start.='bgcolor="#ffffff"';
103: }
104: }
105: $body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
106: if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
107: my ($symb)=&Apache::lonxml::whichuser();
108: if ($symb eq '') {
109: my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
1.162 albertel 110: $help="Browsing resource, all submissions are temporary.<br />";
1.159 albertel 111: $body_tag_start.=$help;
112: }
113: }
114: }
115: my $form_tag_start;
116: if (!defined($found{'form'})) {
117: $form_tag_start='<form name="lonhomework" method="POST" action="'.
118: $ENV{'request.uri'}.'">';
119: }
120: return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.105 albertel 121: }
122:
1.141 matthew 123: #use Time::HiRes();
1.105 albertel 124: sub get_resource_name {
1.159 albertel 125: my ($parstack,$safeeval)=@_;
126: my $name=&Apache::lonnet::gettitle();
127: if ($name eq '') {
128: $name=&Apache::lonnet::EXT('resource.title');
129: if ($name eq 'con_lost') { $name = ''; }
130: }
131: $Apache::lonhomework::name=$name;
132: return $name;
1.105 albertel 133: }
134:
135: sub setup_rndseed {
1.159 albertel 136: my ($safeeval)=@_;
137: my $rndseed;
1.162 albertel 138: my ($symb)=&Apache::lonxml::whichuser();
139: if ($ENV{'request.state'} eq "construct" || $symb eq '') {
1.159 albertel 140: $rndseed=$ENV{'form.rndseed'};
141: if (!$rndseed) {
1.162 albertel 142: $rndseed=$Apache::lonhomework::history{'rndseed'};
143: if (!$rndseed) {
144: $rndseed=time;
145: $ENV{'form.rndseed'}=$rndseed;
146: }
147: }
148: if ($ENV{'form.resetdata'} eq 'New Problem Variation') {
1.159 albertel 149: $rndseed=time;
150: $ENV{'form.rndseed'}=$rndseed;
151: }
152: &Apache::lonxml::debug("Setting rndseed to $rndseed");
153: &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
154: }
155: return $rndseed;
1.105 albertel 156: }
157:
158: sub problem_edit_header {
1.159 albertel 159: return '<input type="hidden" name="submitted" value="edit" />
1.105 albertel 160: <input type="hidden" name="problemmode" value="Edit" />
161: <input type="submit" name="problemmode" value="Discard Edits and View" />
162: <input type="submit" name="problemmode" value="EditXML" />
163: <input type="submit" name="Undo" value="undo" /> <hr />
1.135 www 164: <input type="submit" name="submit" value="Submit Changes and Edit" />
165: <input type="submit" name="submit" value="Submit Changes and View" /><br /><p> </p><table border="0"><tr><td bgcolor="#DDDDDD">
1.105 albertel 166: ';
167: }
168:
169: sub problem_edit_footer {
1.159 albertel 170: return '</td></tr></table><br /><input type="submit" name="submit" value="Submit Changes and Edit" />
1.105 albertel 171: <input type="submit" name="submit" value="Submit Changes and View" />';
172: }
173:
174: sub problem_web_to_edit_header {
1.159 albertel 175: my ($rndseed)=@_;
176: my $result.='<input type="hidden" name="problemmode" value="View" />
1.105 albertel 177: <input type="submit" name="problemmode" value="Edit" />
178: <input type="submit" name="problemmode" value="EditXML" />
179: Random Seed:<input type="text" name="rndseed" width="10" value="'.
180: $rndseed.'" />
181: <input type="submit" name="changerandseed" value="Change" />
182: <input type="submit" name="resetdata" value="Reset Submissions" />
183: <input type="checkbox" name="showallfoils" ';
1.159 albertel 184: if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
185: $result.= ' /> Show All Foils
1.105 albertel 186: <hr />';
1.159 albertel 187: my $numtoanalyze=$ENV{'form.numtoanalyze'};
188: if (!$numtoanalyze) { $numtoanalyze=100; }
189: $result.= '<input type="submit" name="problemmode" value="Answer Distribution" />
1.136 albertel 190: <input type="text" name="numtoanalyze" value="'.
1.159 albertel 191: $numtoanalyze.'" size="5" /> <hr />';
192: return $result;
1.48 albertel 193: }
194:
1.65 albertel 195: sub initialize_storage {
1.159 albertel 196: %Apache::lonhomework::results=();
1.162 albertel 197: %Apache::lonhomework::history=();
1.159 albertel 198: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.162 albertel 199: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
1.159 albertel 200: %Apache::lonhomework::history=
201: &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
202: my ($temp)=keys %Apache::lonhomework::history ;
203: &Apache::lonxml::debug("Return message of $temp");
204: } else {
205: %Apache::lonhomework::history=
206: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
207: }
208: #ignore error conditions
1.67 albertel 209: my ($temp)=keys %Apache::lonhomework::history ;
1.159 albertel 210: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65 albertel 211: }
212:
213: # -------------------------------------------------------------finalize_storage
214: # Stores away the result has to a student's environment
215: # checks form.grade_ for specific values, other wises stores
216: # to the running users environment
217: sub finalize_storage {
1.159 albertel 218: my $result;
219: my ($temp) = keys %Apache::lonhomework::results;
220: if ( $temp ne '' ) {
221: my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.162 albertel 222: if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
223: $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
1.159 albertel 224: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
225: $ENV{'request.uri'},'',$domain,$name);
226: &Apache::lonxml::debug('Construct Store return message:'.$result);
227: } else {
228: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
229: $symb,$courseid,$domain,$name);
230: &Apache::lonxml::debug('Store return message:'.$result);
231: }
1.67 albertel 232: }
1.159 albertel 233: return $result;
1.65 albertel 234: }
235:
236: sub checkout_msg {
1.159 albertel 237: return (<<ENDCHECKOUT);
1.65 albertel 238: <h2>The resource needs to be checked out</h2>
239: As a resource gets checked out, a unique timestamped ID is given to it, and a
240: permanent record is left in the system.<p />
241: <font color=red>
242: Checking out resources is subject to course policies, and may exclude future
243: credit even if done erroneously.<p />
1.91 albertel 244: </font>
245: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
246: <input type="hidden" name="doescheckout" value="yes" />
247: <input type="button" name="checkoutbutton" value="Check out Exam for Viewing" onClick="javascript:if (confirm('Check out Exam?')) { document.checkout.submit(); }" />
1.65 albertel 248: </form>
249: ENDCHECKOUT
250: }
251:
1.9 albertel 252: sub start_problem {
1.159 albertel 253: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19 albertel 254:
1.159 albertel 255: $Apache::lonhomework::parsing_a_problem=1;
256: # meta is called from lonpublisher, which doesn't uses the normal
257: # lonhomework method of parsing the file which means that inputtags
258: # won't get reset
259: if ( $Apache::inputtags::part ne '' && $target != 'meta' ) {
260: &Apache::lonxml::error('Only one problem allowed in a .problem file');
261: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
262: return '';
263: }
1.161 albertel 264: #initialize globals
1.159 albertel 265: $Apache::inputtags::part='0';
266: @Apache::inputtags::responselist = ();
267: @Apache::inputtags::previous=();
268: @Apache::inputtags::previous_version=();
269: $Apache::structuretags::printanswer='No';
1.161 albertel 270: @Apache::structuretags::whileconds=();
271: @Apache::structuretags::whilebody=();
272: @Apache::structuretags::whileline=();
273:
1.159 albertel 274: if ($target ne 'analyze') {
275: &initialize_storage();
276: if ($target eq 'web') {
277: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
278: }
279: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
280: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
281: }
1.164 ! albertel 282: if ($Apache::lonhomework::type eq '' ) {
1.159 albertel 283: my $uri=$ENV{'request.uri'};
284: if ($uri=~/\.(\w+)$/) {
285: $Apache::lonhomework::type=$1;
286: &Apache::lonxml::debug("Using type of $1");
287: } else {
288: $Apache::lonhomework::type='problem';
289: &Apache::lonxml::debug("Using default type, problem, :$uri:");
290: }
1.87 albertel 291: }
1.58 www 292:
1.159 albertel 293: #added vars to the scripting enviroment
294: my $expression='$external::part='.$Apache::inputtags::part.';';
1.24 albertel 295: &Apache::run::run($expression,$safeeval);
1.159 albertel 296: my $status;
297: my $accessmsg;
298:
299: #should get back a <html> or the neccesary stuff to start XML/MathML
300: my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
301: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
302: if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
303:
304: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
305: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
306: $target eq 'tex') {
307: #handle exam checkout
308: if ($Apache::lonhomework::type eq 'exam') {
309: my $token=
310: $Apache::lonhomework::history{"resource.0.outtoken"};
311: if (($ENV{'form.doescheckout'}) && (!$token)) {
312: $token=&Apache::lonxml::maketoken();
313: $Apache::lonhomework::history{"resource.0.outtoken"}=
314: $token;
315: }
316: $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
1.142 albertel 317: }
1.159 albertel 318:
319: #handle rand seed in construction space
320: my $rndseed=&setup_rndseed($safeeval);
1.162 albertel 321: my ($symb)=&Apache::lonxml::whichuser();
1.163 albertel 322: if ($ENV{'request.state'} ne "construct" && $symb eq '') {
1.162 albertel 323: $form_tag_start.='<input type="hidden" name="rndseed" value="'.
324: $rndseed.'" />'.
325: '<input type="submit" name="resetdata"
1.164 ! albertel 326: value="New Problem Variation" />'.
! 327: '<input type="hidden" name="username"
! 328: value="'.$ENV{'form.username'}.'" />';
1.162 albertel 329: }
1.159 albertel 330: ($status,$accessmsg) = &Apache::lonhomework::check_access('0');
331: push (@Apache::inputtags::status,$status);
332: my $expression='$external::datestatus="'.$status.'";';
333: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
334: &Apache::run::run($expression,$safeeval);
335: &Apache::lonxml::debug("Got $status");
336: if (( $status eq 'CLOSED' ) ||
337: ( $status eq 'UNCHECKEDOUT') ||
338: ( $status eq 'BANNED') ||
339: ( $status eq 'UNAVAILABLE')) {
340: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
341: if ( $target eq "web" ) {
342: $result.= $head_tag_start.'</head>';
343: my $msg=$body_tag_start;
344: if ($status eq 'UNAVAILABLE') {
345: $result.='<h1>Unable to determine if this resource is open due to network problems. Please try again later.</h1>';
346: } else {
347: $result.='<h1>Not open to be viewed</h1>';
348: }
349: if ($status eq 'CLOSED') {
350: $msg.='The problem '.$accessmsg;
351: } elsif ($status eq 'UNCHECKEDOUT') {
352: $msg.=&checkout_msg;
353: }
354: $result.=$msg.'<br />';
355: } elsif ($target eq 'tex') {
356: $result.='\begin{document}\noindent \vskip 1 mm \begin{minipage}{\textwidth}\vskip 0 mm';
357: if ($status eq 'UNAVAILABLE') {
358: $result.='Unable to determine if this resource is open due to network problems. Please try again later.\vskip 0 mm ';
359: } else {
360: $result.="Problem is not open to be viewed. It $accessmsg \\vskip 0 mm ";
361: }
362: }
363: } elsif ($target eq 'web') {
364: my $name= &get_resource_name($parstack,$safeeval);
365: if ($status eq 'CAN_ANSWER') {
366: # create a page header and exit
367: $result.="$head_tag_start<title>$name</title></head>
1.158 sakharuk 368: $body_tag_start \n $form_tag_start".
1.159 albertel 369: '<input type="hidden" name="submitted" value="yes" />';
370: if ($ENV{'request.state'} eq "construct") {
371: $result.= &problem_web_to_edit_header($rndseed);
372: }
373: # if we are viewing someone else preserve that info
374: if (defined $ENV{'form.grade_symb'}) {
375: foreach my $field ('symb','courseid','domain','username') {
376: $result .= '<input type="hidden" name="grade_'.$field.
377: '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
378: }
379: }
380: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
381: || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE') {
382: $result.=$head_tag_start.
383: "<title>$name</title></head>\n$body_tag_start\n";
384: }
385: } elsif ($target eq 'tex') {
386: my $name= &Apache::lonxml::get_param('name',$parstack,$safeeval);
387: if ($name eq '') {
388: $name=&Apache::lonnet::EXT('resource.title');
389: if ($name eq 'con_lost') { $name = ''; }
390: }
391: $Apache::lonhomework::name=$name;
392: my $id = $Apache::inputtags::part;
393: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
394: my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
395: my @allkeys = split /,/,$allkeys;
396: my $allow_print_points = 0;
397: foreach my $partial_key (@allkeys) {
398: if ($partial_key=~m/weight/) {
399: $allow_print_points++;
400: }
401: }
402: my $duedate = &Apache::lonnet::EXT("resource.$id.duedate");
403: $duedate = POSIX::strftime("%c",localtime($duedate));
404: my $temp_file;
405: my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
406: if (-e $filename) {
407: $temp_file = Apache::File->new($filename);
408: } else {
409: $temp_file = Apache::File->new('>>'.$filename);
410: }
411: my @due_file_content = <$temp_file>;
412: my $due_file_content = $due_file_content[$#due_file_content];
413: chomp $due_file_content;
414: my $name_of_resourse= &get_resource_name($parstack,$safeeval);
415: if ($due_file_content ne $duedate) {
416: $temp_file = Apache::File->new('>'.$filename);
417: print $temp_file "$duedate\n";
418: if (not $ENV{'request.symb'} =~ m/\.page_/) {
419: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
420: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent \begin{minipage}{\textwidth}';
421: } else {
422: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent\begin{minipage}{\textwidth}';
423: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
424: }
1.104 sakharuk 425: } else {
1.159 albertel 426: $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
1.104 sakharuk 427: }
1.101 sakharuk 428: } else {
1.159 albertel 429: if (not $ENV{'request.symb'} =~ m/\.page_/) {
430: $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$ENV{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent\begin{minipage}{\textwidth}';
431: if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
432: } else {
433: $result .= '\vskip 1mm \\\\\\\\';
434: }
435: }
1.99 sakharuk 436: }
1.159 albertel 437: } elsif ($target eq 'edit') {
438: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
439: &problem_edit_header();
440: my $temp=&Apache::edit::insertlist($target,$token);
441: $result.=$temp;
442: } elsif ($target eq 'modified') {
443: $result=$token->[4];
444: $result.=&Apache::edit::handle_insert();
445: } else {
446: # page_start returned a starting result, delete it if we don't need it
447: $result = '';
1.99 sakharuk 448: }
1.159 albertel 449: return $result;
1.9 albertel 450: }
451:
452: sub end_problem {
1.159 albertel 453: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
454: my $result='';
455: my $status=$Apache::inputtags::status['-1'];
456: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
457: $target eq 'tex') {
458: if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
459: $status eq 'CAN_ANSWER' ) {
460: # if part is zero, no <part>s existed, so we need to the grading
461: &Apache::inputtags::grade;
462: } elsif ( ($target eq 'web' || $target eq 'tex') &&
463: $Apache::inputtags::part eq '0' &&
464: $status ne 'UNCHECKEDOUT') {
465: # if part is zero, no <part>s existed, so we need show the current
466: # grading status
467: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
468: $result.= $gradestatus;
469: }
470: if (
471: (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
472: ($target eq 'answer') || ($target eq 'tex')
473: ) {
474: if ($status eq 'CAN_ANSWER') {
475: if ($target ne 'tex') {
476: $result.="</form></body>\n";
477: }
478: } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
479: $status eq 'UNCHECKEDOUT' ) {
480: if ($target ne 'tex') {
481: $result.="</body>\n";
482: }
483: }
484: if ($target eq 'web') {
485: $result.=&Apache::lonxml::xmlend();
486: } elsif ($target eq 'tex') {
487: $result .= '\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
488: if (not $ENV{'request.symb'} =~ m/\.page_/) {
489: $result .= '\end{minipage}\end{document} ';
490: } else {
491: $result .= '';
492: }
493: }
494: }
495: if ($target eq 'grade') {
496: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
497: &finalize_storage();
498: }
499: if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct') ) {
500: $result.='</html>'; #normally we get it from xmlend, but in CSTR
501: # we always show answer mode too.
502: }
503: } elsif ($target eq 'meta') {
504: if ($Apache::inputtags::part eq '0') {
505: $result=&Apache::response::mandatory_part_meta;
506: }
507: } elsif ($target eq 'edit') {
508: &Apache::lonxml::debug("in end_problem with $target, edit");
509: $result = &problem_edit_footer();
510: }
1.155 albertel 511:
1.159 albertel 512: undef(%Apache::lonhomework::history);
513: undef(%Apache::lonhomework::results);
514: undef($Apache::inputtags::part);
515: undef($Apache::lonhomework::parsing_a_problem);
516:
517: return $result;
1.48 albertel 518: }
519:
1.108 albertel 520:
1.48 albertel 521: sub start_library {
1.159 albertel 522: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
523: my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.109 albertel 524:
1.159 albertel 525: if ($target eq 'edit') {
526: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
527: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
528: $result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
529: &problem_edit_header();
530: my $temp=&Apache::edit::insertlist($target,$token);
531: $result.=$temp;
532: } elsif ($target eq 'modified') {
533: $result=$token->[4];
534: $result.=&Apache::edit::handle_insert();
535: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
536: $ENV{'request.state'} eq "construct" ) {
537: ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
538: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
539: my $name=&get_resource_name($parstack,$safeeval);
540: my $rndseed=&setup_rndseed($safeeval);
541: $result.="$head_tag_start<title>$name</title></head>
1.105 albertel 542: $body_tag_start \n $form_tag_start".
1.159 albertel 543: '<input type="hidden" name="submitted" value="yes" />';
544: $result.=&problem_web_to_edit_header($rndseed);
545: }
546: return $result;
1.48 albertel 547: }
548:
549: sub end_library {
1.159 albertel 550: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
551: my $result='';
552: if ($target eq 'edit') {
553: $result=&problem_edit_footer();
554: } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
555: $ENV{'request.state'} eq "construct") {
556: $result.='</form></body>'.&Apache::lonxml::xmlend();
557: }
558: return $result;
1.1 albertel 559: }
560:
561: sub start_block {
1.131 albertel 562: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
563:
564: my $result;
1.1 albertel 565:
1.160 albertel 566: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.131 albertel 567: $target eq 'tex' || $target eq 'analyze') {
1.159 albertel 568: my $code = $token->[2]->{'condition'};
1.131 albertel 569: if ($code) {
1.137 albertel 570: if (!$Apache::lonxml::default_homework_loaded) {
571: &Apache::lonxml::default_homework_load($safeeval);
572: }
1.131 albertel 573: $result = &Apache::run::run($code,$safeeval);
574: &Apache::lonxml::debug("block :$code: returned :$result:");
575: } else {
576: $result='1';
577: }
578: if ( ! $result ) {
1.146 albertel 579: my $skip=&Apache::lonxml::get_all_text("/block",$parser);
1.131 albertel 580: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
581: }
582: $result='';
583: } elsif ($target eq 'edit') {
584: $result .=&Apache::edit::tag_start($target,$token);
585: $result .=&Apache::edit::text_arg('Test Condition:','condition',
586: $token,40);
587: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
588: } elsif ($target eq 'modified') {
589: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
590: $safeeval,'condition');
591: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38 albertel 592: }
1.131 albertel 593: return $result;
1.1 albertel 594: }
595:
596: sub end_block {
1.159 albertel 597: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160 albertel 598: my $result;
599: if ($target eq "edit") {
600: $result.= &Apache::edit::tag_end($target,$token,'');
601: }
602: return $result;
1.4 tsai 603: }
604:
605: sub start_while {
1.159 albertel 606: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
607:
1.160 albertel 608: my $result;
1.161 albertel 609: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.160 albertel 610: $target eq 'tex' || $target eq 'analyze') {
611: my $code = $token->[2]->{'condition'};
1.4 tsai 612:
1.160 albertel 613: push( @Apache::structuretags::whileconds, $code);
614: if (!$Apache::lonxml::default_homework_loaded) {
615: &Apache::lonxml::default_homework_load($safeeval);
616: }
617: my $result = &Apache::run::run($code,$safeeval);
1.161 albertel 618: my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
1.160 albertel 619: push( @Apache::structuretags::whilebody, $bodytext);
1.161 albertel 620: push( @Apache::structuretags::whileline, $token->[5]);
621: &Apache::lonxml::debug("s code $code got -$result-");
1.160 albertel 622: if ( $result ) {
623: &Apache::lonxml::newparser($parser,\$bodytext);
624: }
625: } elsif ($target eq 'edit') {
626: $result .=&Apache::edit::tag_start($target,$token);
627: $result .=&Apache::edit::text_arg('Test Condition:','condition',
628: $token,40);
629: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
630: } elsif ($target eq 'modified') {
631: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
632: $safeeval,'condition');
633: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159 albertel 634: }
1.160 albertel 635: return $result;
1.4 tsai 636: }
637:
638: sub end_while {
1.159 albertel 639: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160 albertel 640: my $result;
641:
642: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
643: $target eq 'tex' || $target eq 'analyze') {
644: my $code = pop(@Apache::structuretags::whileconds);
645: my $bodytext = pop(@Apache::structuretags::whilebody);
1.161 albertel 646: my $line = pop(@Apache::structuretags::whileline);
647: my $return = &Apache::run::run($code,$safeeval);
648: my $starttime=time;
649: my $error=0;
650: while ($return) {
651: if (time-$starttime >
652: $Apache::lonnet::perlvar{'lonScriptTimeout'}) {
653: $return = 0; $error=1; next;
654: }
655: $result.=&Apache::scripttag::xmlparse($bodytext);
656: $return = &Apache::run::run($code,$safeeval);
657: }
658: if ($error) {
659: &Apache::lonxml::error('<pre>Code ran too long. It ran for more than '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' seconds occured while running <while$gt; on line '.$line.'</pre>');
1.160 albertel 660: }
661: } elsif ($target eq "edit") {
662: $result.= &Apache::edit::tag_end($target,$token,'');
1.159 albertel 663: }
1.160 albertel 664: return $result;
1.1 albertel 665: }
1.6 tsai 666:
1.160 albertel 667: # <randomlist show="1">
1.6 tsai 668: # <tag1>..</tag1>
669: # <tag2>..</tag2>
670: # <tag3>..</tag3>
1.160 albertel 671: # ...
1.6 tsai 672: # </randomlist>
673: sub start_randomlist {
1.159 albertel 674: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
675: my $result;
676: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
677: $target eq 'tex' || $target eq 'analyze') {
678: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
679: my $b_parser= HTML::TokeParser->new(\$body);
680: my $b_tok;
681: my @randomlist;
682: my $list_item;
683: while($b_tok = $b_parser->get_token() ) {
684: if($b_tok->[0] eq 'S') { # start tag
685: # get content of the tag until matching end tag
686: # get all text upto the matching tag
687: # and push the content into @randomlist
688: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
689: $b_parser);
690: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
691: push(@randomlist,$list_item);
692: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
693: # $list_item</b>";
694: }
695: if($b_tok->[0] eq 'T') { # text
696: # what to do with text in between tags?
697: # print "<b>TEXT $b_tok->[1]</b><br />";
698: }
699: # if($b_tok->[0] eq 'E') { # end tag, should not happen
700: # print "<b>END-TAG $b_tok->[1]</b><br />";
701: # }
702: }
703: my @idx_arr = (0 .. $#randomlist);
704: &Apache::structuretags::shuffle(\@idx_arr);
705: my $bodytext = '';
706: my $show=$#randomlist;
707: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
708: $showarg--;
709: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
710: for(0 .. $show) {
711: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
712: }
713: &Apache::lonxml::newparser($parser,\$bodytext);
714: } elsif ($target eq 'edit' ) {
715: $result .=&Apache::edit::tag_start($target,$token);
716: $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
717: $token,5);
718: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
719: } elsif ($target eq 'modified' ) {
720: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
721: $safeeval,'show');
722: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
723: }
724: return $result;
1.7 tsai 725: }
726:
727: sub shuffle {
728: my $a=shift;
729: my $i;
1.70 albertel 730: if (defined(@$a)) {
1.159 albertel 731: &Apache::response::setrandomnumber();
732: for($i=@$a;--$i;) {
733: my $j=int(&Math::Random::random_uniform() * ($i+1));
734: next if $i == $j;
735: @$a[$i,$j] = @$a[$j,$i];
736: }
1.7 tsai 737: }
1.6 tsai 738: }
739:
740: sub end_randomlist {
1.159 albertel 741: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
742: my $result;
743: if ($target eq 'edit' ) {
744: $result=&Apache::edit::tag_end($target,$token,
745: 'End Randomly Parsed Block');
746: }
747: return $result;
1.6 tsai 748: }
749:
1.11 albertel 750: sub start_part {
1.159 albertel 751: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
752: my $result='';
753: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
754: if ($id eq '') { $id = $Apache::lonxml::curdepth; }
755: $Apache::inputtags::part=$id;
756: @Apache::inputtags::responselist = ();
757: @Apache::inputtags::previous=();
758: @Apache::inputtags::previous_version=();
759: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
760:
761: if ($target eq 'meta') {
762: return &Apache::response::mandatory_part_meta;
763: } elsif ($target eq 'web' || $target eq 'grade' ||
764: $target eq 'answer' || $target eq 'tex') {
765: if ($hidden) {
766: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
767: } else {
768: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
769: push (@Apache::inputtags::status,$status);
770: my $expression='$external::datestatus="'.$status.'";';
771: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
772: &Apache::run::run($expression,$safeeval);
773: if ( $status eq 'CLOSED' ) {
774: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
775: if ( $target eq "web" ) {
776: $result="<br />Part is not open to be viewed. It $accessmsg<br />";
777: } elsif ( $target eq 'tex' ) {
778: $result="\\end{minipage}\\vskip 0 mm Part is not open to be viewed. It $accessmsg \\\\\\begin{minipage}{\\textwidth}";
779: }
780: } else {
781: if ($target eq 'tex') {
782: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
783: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
784: if ($Apache::lonhomework::type eq 'exam') { $result .= '\fbox{\textit{'.$weight.' pt}}';}
785: }
786: }
787: }
788: } elsif ($target eq 'edit') {
789: $result.=&Apache::edit::tag_start($target,$token);
790: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
791: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
792: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
793: } elsif ($target eq 'modified') {
794: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
795: $safeeval,'id');
796: if ($constructtag) {
797: $result = &Apache::edit::rebuild_tag($token);
798: $result.=&Apache::edit::handle_insert();
799: }
800: }
801: return $result;
1.11 albertel 802: }
803:
804: sub end_part {
1.159 albertel 805: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
806: &Apache::lonxml::debug("in end_part $target ");
807: my $status=$Apache::inputtags::status['-1'];
808: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
809: my $result='';
810: if ( $target eq 'meta' ) {
811: $result='';
812: } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
813: $result=&Apache::inputtags::grade;
814: } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
815: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
816: $target);
817: if ($Apache::lonhomework::type eq 'exam') {$gradestatus='';}
818: $result=$gradestatus;
819: }
820: pop @Apache::inputtags::status;
821: $Apache::inputtags::part='';
822: return $result;
1.11 albertel 823: }
1.1 albertel 824:
1.25 albertel 825: sub start_preduedate {
1.159 albertel 826: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
827: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
828: if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
829: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
830: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
831: &Apache::lonxml::get_all_text("/preduedate",$parser);
832: }
1.24 albertel 833: }
1.159 albertel 834: return '';
1.24 albertel 835: }
836:
1.25 albertel 837: sub end_preduedate {
1.159 albertel 838: return '';
1.24 albertel 839: }
840:
1.25 albertel 841: sub start_postanswerdate {
1.159 albertel 842: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
843: if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
844: if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
845: &Apache::lonxml::get_all_text("/postanswerdate",$parser);
846: }
847: } elsif ($target eq 'tex') {
848: return '\vskip 0 mm \noindent';
849: }
850: return '';
1.24 albertel 851: }
852:
1.25 albertel 853: sub end_postanswerdate {
1.159 albertel 854: return '';
1.24 albertel 855: }
856:
1.25 albertel 857: sub start_notsolved {
1.159 albertel 858: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
859: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
860: $target eq 'tex') {
861: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
862: &Apache::lonxml::debug("not solved has :$gradestatus:");
863: if ($gradestatus =~ /^correct/) {
864: &Apache::lonxml::debug("skipping");
865: &Apache::lonxml::get_all_text("/notsolved",$parser);
866: }
1.24 albertel 867: }
1.159 albertel 868: return '';
1.24 albertel 869: }
870:
1.25 albertel 871: sub end_notsolved {
1.159 albertel 872: return '';
1.24 albertel 873: }
874:
875: sub start_solved {
1.159 albertel 876: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
877: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
878: $target eq 'tex') {
879: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
880: if ($gradestatus !~ /^correct/) {
881: &Apache::lonxml::get_all_text("/solved",$parser);
882: }
1.24 albertel 883: }
1.159 albertel 884: return '';
1.24 albertel 885: }
886:
887: sub end_solved {
1.159 albertel 888: return '';
1.24 albertel 889: }
1.34 albertel 890:
891: sub start_startouttext {
1.159 albertel 892: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
893: my @result=(''.'');
894: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
895: return (@result);
1.34 albertel 896: }
1.159 albertel 897:
1.34 albertel 898: sub end_startouttext {
1.159 albertel 899: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
900: my $result='';
901: my $text='';
902:
903: if ($target eq 'edit') {
904: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
905: $result.=&Apache::edit::start_table($token)."<tr><td>Text Block</td>
1.42 albertel 906: <td>Delete:".
1.159 albertel 907: &Apache::edit::deletelist($target,$token)
908: ."</td>
1.42 albertel 909: <td>".
1.159 albertel 910: &Apache::edit::insertlist($target,$token).
911: &Apache::edit::end_row().
912: &Apache::edit::start_spanning_row()."\n"
913: .'<table><tr><td>'.
914: &Apache::loncommon::help_open_topic("Greek_Symbols",
915: 'Greek Symbols',
916: undef,undef,600)
917: .'</td><td>'.
918: &Apache::loncommon::help_open_topic("Other_Symbols",
919: 'Other Symbols',
920: undef,undef,600)
921: .'</td></tr></table>'.
922: &Apache::edit::editfield($token->[1],$text,"",80,4);
923: }
924: if ($target eq 'modified') {
925: $text=&Apache::lonxml::get_all_text("endouttext",$parser);
926: $result='<startouttext />'.&Apache::edit::modifiedfield();
927: }
928: if ($target eq 'tex') {
929: $result .= '\noindent ';
930: }
931: return $result;
1.34 albertel 932: }
1.159 albertel 933:
1.34 albertel 934: sub start_endouttext {
1.159 albertel 935: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
936: my $result='';
937: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
938: if ($target eq "modified") {
939: $result='<endouttext />'.
940: &Apache::edit::handle_insertafter('startouttext'); }
941: return $result;
1.34 albertel 942: }
1.159 albertel 943:
1.34 albertel 944: sub end_endouttext {
1.159 albertel 945: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
946: my @result=('','');
947: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
948: return (@result);
1.34 albertel 949: }
1.159 albertel 950:
1.45 albertel 951: sub delete_startouttext {
1.159 albertel 952: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
953: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
954: my $text=$$parser['-1']->get_text("/endouttext");
955: my $ntoken=$$parser['-1']->get_token();
956: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
957: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
958: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
959: # they did the last time round
960: &Apache::lonxml::increasedepth($ntoken);
961: &Apache::lonxml::decreasedepth($ntoken);
962: return 1;
1.45 albertel 963: }
1.34 albertel 964:
1.1 albertel 965: 1;
966: __END__
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