1: # The LearningOnline Network with CAPA
2: # definition of tags that give a structure to a document
3: #
4: # $Id: structuretags.pm,v 1.385 2007/07/24 18:03:54 albertel Exp $
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: #
28: ###
29:
30:
31: package Apache::structuretags;
32:
33: use strict;
34: use Apache::lonnet;
35: use Apache::File();
36: use Apache::lonmenu;
37: use Apache::lonlocal;
38: use Apache::lonxml;
39: use Apache::lonenc();
40: use Time::HiRes qw( gettimeofday tv_interval );
41: use lib '/home/httpd/lib/perl/';
42: use LONCAPA;
43:
44: BEGIN {
45: &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startouttext','endouttext','simpleeditbutton','definetag'));
46: }
47:
48: sub start_web {
49: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
50: if ($target ne 'edit' && $target ne 'modified') {
51: my $bodytext=&Apache::lonxml::get_all_text("/web",$parser,$style);
52: if ($target eq 'web' || $target eq 'webgrade') {
53: return $bodytext;
54: }
55: } elsif ($target eq "edit" ) {
56: my $bodytext =
57: &Apache::lonxml::get_all_text_unbalanced("/web",$parser);
58: my $result = &Apache::edit::tag_start($target,$token);
59: $result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
60: return $result;
61: } elsif ( $target eq "modified" ) {
62: return $token->[4].&Apache::edit::modifiedfield("/web",$parser);
63: }
64: return '';
65: }
66:
67: sub end_web {
68: return '';
69: }
70:
71: sub start_tex {
72: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
73: my $result='';
74: if ($target ne 'edit' && $target ne 'modified') {
75: my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
76: if ($target eq 'tex') {
77: return $bodytext.' ';
78: }
79: } elsif ($target eq "edit" ) {
80: my $bodytext =
81: &Apache::lonxml::get_all_text_unbalanced("/tex",$parser);
82: my $result = &Apache::edit::tag_start($target,$token);
83: $result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
84: return $result;
85: } elsif ( $target eq "modified" ) {
86: return $token->[4].&Apache::edit::modifiedfield("/tex",$parser);
87: }
88: return $result;;
89: }
90:
91: sub end_tex {
92: return '';
93: }
94:
95: sub page_start {
96: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
97: $extra_head)=@_;
98: my %found;
99: foreach my $taginside (@$tagstack) {
100: foreach my $taglookedfor ('html','body','form') {
101: if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
102: }
103: }
104:
105: if ($target eq 'tex') {
106: return
107: &Apache::londefdef::start_html($target,$token,$tagstack,
108: $parstack,$parser,$safeeval);
109: }
110:
111: $extra_head.= '
112: <script type="text/javascript">
113: function setSubmittedPart (part) {
114: this.document.lonhomework.submitted.value="part_"+part;
115: }
116: </script>
117: ';
118:
119: my %body_args;
120: if (defined($found{'html'})) {
121: $body_args{'skip_phases'}{'head'}=1;
122: } else {
123:
124: $extra_head .= &Apache::lonhtmlcommon::spellheader();
125:
126: $extra_head .= &Apache::londefdef::generate_css_links();
127:
128: if ($env{'request.state'} eq 'construct') {
129: $extra_head.=&Apache::edit::js_change_detection().
130: "<script type=\"text/javascript\">\n".
131: "if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
132: &Apache::loncommon::browser_and_searcher_javascript().
133: "\n</script>\n";
134: }
135: }
136:
137: if (defined($found{'body'})) {
138: $body_args{'skip_phases'}{'body'}=1;
139: } elsif (!defined($found{'body'})
140: && $env{'request.state'} eq 'construct') {
141: if ($target eq 'web' || $target eq 'edit') {
142: # no extra args to bodytag
143: }
144: } elsif (!defined($found{'body'})) {
145: my %add_entries;
146: my $background=&Apache::lonxml::get_param('background',$parstack,
147: $safeeval);
148: if ($background ne '' ) {
149: $add_entries{'background'} = $background;
150: }
151:
152: my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
153: $safeeval);
154: if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
155:
156: $body_args{'bgcolor'} = $bgcolor;
157: $body_args{'no_title'} = 1;
158: $body_args{'force_register'} = 1;
159: $body_args{'add_entries'} = \%add_entries;
160: }
161: $body_args{'no_auto_mt_title'} = 1;
162: my $page_start = &Apache::loncommon::start_page($name,$extra_head,
163: \%body_args);
164:
165: if (!defined($found{'body'})
166: && $env{'request.state'} ne 'construct'
167: && ($target eq 'web' || $target eq 'webgrade')) {
168:
169: my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
170: if ($symb eq '' && !$publicuser) {
171: my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
172: $help=&mt("Browsing resource, all submissions are temporary.")."<br />";
173: $page_start .= $help;
174: }
175: }
176:
177: if (!defined($found{'body'})) {
178: $page_start .= &Apache::lonxml::message_location();
179: }
180:
181: my $form_tag_start;
182: if (!defined($found{'form'})) {
183: $form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
184: my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
185: $form_tag_start.=$uri.'" ';
186: if ($target eq 'edit') {
187: $form_tag_start.=&Apache::edit::form_change_detection();
188: }
189: $form_tag_start.='>'."\n";
190:
191: my $symb=&Apache::lonnet::symbread();
192: if ($symb =~ /\S/) {
193: $symb=
194: &HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
195: $form_tag_start.=
196: "\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
197: }
198: }
199: return ($page_start,$form_tag_start);
200: }
201:
202: #use Time::HiRes();
203: sub get_resource_name {
204: my ($parstack,$safeeval)=@_;
205: if (defined($Apache::lonhomework::name)) {
206: return $Apache::lonhomework::name;
207: }
208: my ($symb)=&Apache::lonnet::whichuser();
209: my $name=&Apache::lonnet::gettitle($symb);
210: if ($name eq '') {
211: $name=&Apache::lonnet::EXT('resource.title');
212: if ($name eq 'con_lost') { $name = ''; }
213: }
214: if ($name!~/\S+/) {
215: $name=$env{'request.uri'};
216: $name=~s-.*/([^/]+)$-$1-;
217: }
218: $Apache::lonhomework::name=$name;
219: return $name;
220: }
221:
222: sub setup_rndseed {
223: my ($safeeval)=@_;
224: my $rndseed;
225: my ($symb)=&Apache::lonnet::whichuser();
226: if ($env{'request.state'} eq "construct"
227: || $symb eq ''
228: || $Apache::lonhomework::type eq 'practice'
229: || $Apache::lonhomework::history{'resource.CODE'}) {
230: &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
231: ['rndseed']);
232: $rndseed=$env{'form.rndseed'};
233: if (!$rndseed) {
234: $rndseed=$Apache::lonhomework::history{'rndseed'};
235: if (!$rndseed) {
236: $rndseed=time;
237: }
238: $env{'form.rndseed'}=$rndseed;
239: }
240: if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
241: && $env{'form.submitted'} eq 'yes') ||
242: $env{'form.newrandomization'} eq &mt('New Randomization')) {
243: srand(time);
244: $rndseed=int(rand(2100000000));
245: $env{'form.rndseed'}=$rndseed;
246: delete($env{'form.resetdata'});
247: delete($env{'form.newrandomization'});
248: }
249: if (defined($rndseed) && $rndseed ne int($rndseed)) {
250: $rndseed=join(':',&Apache::lonnet::digest($rndseed));
251: }
252: if ($Apache::lonhomework::history{'resource.CODE'}) {
253: $rndseed=&Apache::lonnet::rndseed();
254: }
255: if ($safeeval) {
256: &Apache::lonxml::debug("Setting rndseed to $rndseed");
257: &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
258: }
259: }
260: return $rndseed;
261: }
262:
263: sub remember_problem_state {
264: return '
265: <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
266: <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
267: <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
268: }
269:
270: sub problem_edit_header {
271: return '<input type="hidden" name="submitted" value="edit" />'.
272: &Apache::structuretags::remember_problem_state().'
273: <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
274: <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
275: <input '.&Apache::edit::submit_ask_anyway().' type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
276: <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> <hr />
277: <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes and Edit').'" />
278: <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
279: &Apache::loncommon::help_open_menu('Problem Editing Help','Problem_Editor_XML_Index',5,'Authoring',undef,undef,undef,'Problem Editing Help')
280: .'</td></tr></table>'.
281: '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
282: }
283:
284: sub problem_edit_footer {
285: return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
286: <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />'.
287: &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields()).
288: "\n</form>\n".&Apache::loncommon::end_page();
289: }
290:
291: sub option {
292: my ($value,$name) = @_;
293: my $result ="<option value='".$value."' ";
294: if ($env{'form.'.$name} eq $value) {
295: $result.=" selected='on' ";
296: }
297: $result.='>';
298: return $result;
299: }
300:
301: sub problem_web_to_edit_header {
302: my ($rndseed)=@_;
303: my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />';
304: $result .= '<input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />';
305: $result .= '<input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
306: <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
307: <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
308: <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
309: <input type="text" name="rndseed" size="10" value="'.
310: $rndseed.'"
311: onchange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
312: <span class="LC_nobreak"><label><input type="checkbox" name="showallfoils" ';
313: my $show_all_foils_text =
314: ($Apache::lonhomework::parsing_a_task) ?
315: &mt(' Show All Instances')
316: : &mt(' Show All Foils');
317:
318: if (defined($env{'form.showallfoils'})) { $result.='checked="on"'; }
319: $result.= ' />'.$show_all_foils_text.'</label></span>'.
320: &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
321: '<hr />';
322: $result.=&mt('Apply style file').'
323: <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
324: <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
325: <input type="submit" name="clear_style_file" value="'.&mt('Clear').'" />
326: <br />';
327:
328: if (!$Apache::lonhomework::parsing_a_task) {
329: $result.="
330: <nobr>
331: Problem Status:
332: <select name='problemstate'>
333: <option value=''></option>
334: ".&option('CLOSED' ,'problemstate').&mt("Closed")."</option>
335: ".&option('CAN_ANSWER' ,'problemstate').&mt("Answerable")."</option>
336: ".&option('CANNOT_ANSWER_tries' ,'problemstate').&mt("Open with full tries")."</option>
337: ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
338: ".&option('SHOW_ANSWER' ,'problemstate').&mt("Show Answer")."</option>
339: </select>
340: </nobr>
341: <nobr>
342: Problem Type:
343: <select name='problemtype'>
344: <option value=''></option>
345: ".&option('exam' ,'problemtype').&mt("Exam Problem")."</option>
346: ".&option('problem','problemtype').&mt("Homework problem")."</option>
347: ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
348: </select>
349: </nobr>
350: <nobr>
351: Feedback Mode:
352: <select name='problemstatus'>
353: <option value=''></option>
354: ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
355: ".&option('no', 'problemstatus').&mt("Don't Show Feedback")."</option>
356: </select>
357: </nobr>
358: <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
359: <hr />";
360: my $numtoanalyze=$env{'form.numtoanalyze'};
361: if (!$numtoanalyze) { $numtoanalyze=20; }
362: $result.= '<input type="submit" name="problemmode" value='.
363: &mt('"Calculate answers').'" /> for
364: <input type="text" name="numtoanalyze" value="'.
365: $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
366: '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
367: '',undef,undef,300).
368: '<hr />';
369: } elsif ($Apache::lonhomework::parsing_a_task) {
370: $result.="
371: <nobr>
372: Problem Status:
373: <select name='problemstate'>
374: <option value=''></option>
375: ".&option('CLOSED' ,'problemstate').&mt("Closed")."</option>
376: ".&option('CAN_ANSWER' ,'problemstate').&mt("Answerable")."</option>
377: ".&option('WEB_GRADE' ,'problemstate').&mt("Criteria Grading")."</option>
378: ".&option('SHOW_ANSWER' ,'problemstate').&mt("Show Feedback")."</option>
379: </select>
380: </nobr>
381: <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
382: <hr />";
383: }
384: return $result;
385: }
386:
387: sub initialize_storage {
388: my ($given_symb) = @_;
389: undef(%Apache::lonhomework::results);
390: undef(%Apache::lonhomework::history);
391: my ($symb,$courseid,$domain,$name) =
392: &Apache::lonnet::whichuser($given_symb);
393:
394: # anonymous users (CODEd exams) have no data
395: if ($name eq 'anonymous'
396: && !defined($domain)) {
397: return;
398: }
399:
400: if ($env{'request.state'} eq 'construct'
401: || $symb eq ''
402: || $Apache::lonhomework::type eq 'practice') {
403:
404: my $namespace = $symb || $env{'request.uri'};
405: if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
406: ($env{'form.resetdata'} eq &mt('New Problem Variation')
407: && $env{'form.submitted'} eq 'yes') ||
408: $env{'form.newrandomization'} eq &mt('New Randomization')) {
409: &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
410: &Apache::lonxml::debug("Attempt reset");
411: }
412: %Apache::lonhomework::history=
413: &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
414: my ($temp)=keys %Apache::lonhomework::history ;
415: &Apache::lonxml::debug("Return message of $temp");
416: } else {
417: %Apache::lonhomework::history=
418: &Apache::lonnet::restore($symb,$courseid,$domain,$name);
419: }
420:
421: #ignore error conditions
422: my ($temp)=keys %Apache::lonhomework::history ;
423: if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
424: }
425:
426: # -------------------------------------------------------------finalize_storage
427: # Stores away the result has to a student's environment
428: # checks form.grade_ for specific values, other wises stores
429: # to the running users environment
430: # Will increment totals for attempts, students, and corrects
431: # if running user has student role.
432: sub finalize_storage {
433: my ($given_symb) = @_;
434: my $result;
435: if (%Apache::lonhomework::results) {
436: my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
437: delete(@Apache::lonhomework::results{@remove});
438: my ($symb,$courseid,$domain,$name) =
439: &Apache::lonnet::whichuser($given_symb);
440: if ($env{'request.state'} eq 'construct'
441: || $symb eq ''
442: || $Apache::lonhomework::type eq 'practice') {
443: my $namespace = $symb || $env{'request.uri'};
444: $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
445: $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
446: $namespace,'',$domain,$name);
447: &Apache::lonxml::debug('Construct Store return message:'.$result);
448: } else {
449: $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
450: $symb,$courseid,$domain,$name);
451: &Apache::lonxml::debug('Store return message:'.$result);
452: if ($env{'request.role'} =~/^st/) {
453: &store_aggregates($symb,$courseid);
454: }
455: }
456: } else {
457: &Apache::lonxml::debug('Nothing to store');
458: }
459: return $result;
460: }
461: use Data::Dumper;
462:
463: # -------------------------------------------------------------store_aggregates
464: # Sends hash of values to be incremented in nohist_resourcetracker.db
465: # for the course. Increments total number of attempts, unique students
466: # and corrects for each part for an instance of a problem, as appropriate.
467: sub store_aggregates {
468: my ($symb,$courseid) = @_;
469: my %aggregate;
470: my @parts;
471: my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
472: my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
473: foreach my $key (keys(%Apache::lonhomework::results)) {
474: if ($key =~ /resource\.([^\.]+)\.tries/) {
475: push(@parts, $1);
476: }
477: }
478: foreach my $part (@parts) {
479: if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
480: eq 'APPROX_ANS' ||
481: $Apache::lonhomework::results{'resource.'.$part.'.award'}
482: eq 'EXACT_ANS') {
483: $aggregate{$symb."\0".$part."\0correct"} = 1;
484: }
485: if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
486: $aggregate{$symb."\0".$part."\0users"} = 1;
487: } else {
488: my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]);
489: if ($last_reset) {
490: if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
491: $aggregate{$symb."\0".$part."\0users"} = 1;
492: }
493: }
494: }
495: $aggregate{$symb."\0".$part."\0attempts"} = 1;
496: }
497: if (keys (%aggregate) > 0) {
498: &Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
499: $cdomain,$cname);
500: }
501: }
502:
503: sub checkout_msg {
504: my %lt=&Apache::lonlocal::texthash(
505: 'resource'=>'The resource needs to be checked out',
506: 'id_expln'=>'As a resource gets checked out, a unique timestamped ID is given to it, and a permanent record is left in the system.',
507: 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
508: 'checkout'=>'Check out Exam for Viewing',
509: 'checkout?'=>'Check out Exam?');
510: my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
511: return (<<ENDCHECKOUT);
512: <h2>$lt{'resource'}</h2>
513: <p>$lt{'id_expln'}</p>
514: <font color="red">
515: <p>$lt{'warning'}</p>
516: </font>
517: <form name="checkout" method="POST" action="$uri">
518: <input type="hidden" name="doescheckout" value="yes" />
519: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
520: </form>
521: ENDCHECKOUT
522: }
523:
524: sub firstaccess_msg {
525: my ($time,$symb)=@_;
526: my ($map)=&Apache::lonnet::decode_symb($symb);
527: my $foldertitle=&Apache::lonnet::gettitle($map);
528: &Apache::lonxml::debug("map is $map title is $foldertitle");
529: my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
530: return (<<ENDCHECKOUT);
531: <h2>The resources in "$foldertitle" are open for a limited time. Once you click the 'Show Resource' button below you have $time to complete all resources "$foldertitle".</h2>
532: <form name="markaccess" method="POST" action="$uri">
533: <input type="hidden" name="markaccess" value="yes" />
534: <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
535: </form>
536: ENDCHECKOUT
537: }
538:
539: sub init_problem_globals {
540: my ($type)=@_;
541: #initialize globals
542: # For problems, we start out in part 0 (outside a <part> tag).
543: # and part 0 is used to describe the main body of the <problem>
544: #
545: if ($type eq 'problem') {
546: $Apache::inputtags::part='0';
547: @Apache::inputtags::partlist=('0');
548: $Apache::lonhomework::problemstatus=&get_problem_status('0');
549: $Apache::lonhomework::ignore_response_errors=0;
550:
551: } elsif ($type eq 'library') {
552: $Apache::inputtags::part='';
553: @Apache::inputtags::partlist=();
554: $Apache::lonhomework::problemstatus='';
555: $Apache::lonhomework::ignore_response_errors=1;
556:
557: } elsif ($type eq 'Task') {
558: $Apache::inputtags::part='0';
559: @Apache::inputtags::partlist=('0');
560: $Apache::lonhomework::problemstatus='';
561: $Apache::lonhomework::ignore_response_errors=1;
562: }
563: @Apache::inputtags::responselist = ();
564: @Apache::inputtags::importlist = ();
565: @Apache::inputtags::previous=();
566: @Apache::inputtags::previous_version=();
567: $Apache::structuretags::printanswer='No';
568: @Apache::structuretags::whileconds=();
569: @Apache::structuretags::whilebody=();
570: @Apache::structuretags::whileline=();
571: $Apache::lonhomework::scantronmode=0;
572: undef($Apache::lonhomework::name);
573: undef($Apache::lonhomework::default_type);
574: undef($Apache::lonhomework::type);
575: }
576:
577: sub reset_problem_globals {
578: my ($type)=@_;
579: undef(%Apache::lonhomework::history);
580: undef(%Apache::lonhomework::results);
581: undef($Apache::inputtags::part);
582: #don't undef this, lonhomework.pm takes care of this, we use this to
583: #detect if we try to do 2 problems in one file
584: # undef($Apache::lonhomework::parsing_a_problem);
585: undef($Apache::lonhomework::name);
586: undef($Apache::lonhomework::default_type);
587: undef($Apache::lonhomework::type);
588: undef($Apache::lonhomework::scantronmode);
589: undef($Apache::lonhomework::problemstatus);
590: undef($Apache::lonhomework::ignore_response_errors);
591: }
592:
593: sub set_problem_state {
594: my ($part)=@_;
595: if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
596: $Apache::lonhomework::history{"resource.$part.solved"}=
597: 'correct_by_student';
598: }
599: }
600:
601: sub get_problem_status {
602: my ($part)=@_;
603: my $problem_status;
604: if ($env{'request.state'} eq 'construct' &&
605: defined($env{'form.problemstatus'})) {
606: $problem_status=$env{'form.problemstatus'};
607: } else {
608: $problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
609: &Apache::lonxml::debug("problem status for $part is $problem_status");
610: &Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
611: }
612: return $problem_status;
613: }
614:
615: sub start_problem {
616: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
617:
618: # We'll use the redirection to fix up printing of duedates.
619: if (!$Apache::lonxml::metamode) {
620: &Apache::lonxml::startredirection();
621: }
622:
623: # Problems don't nest and we don't allow more than one <problem> in
624: # a .problem file.
625: #
626: if ( $Apache::inputtags::part ne '' ||
627: $Apache::lonhomework::parsing_a_problem) {
628: &Apache::lonxml::error('Only one <problem> allowed in a .problem file');
629: #my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
630: return '';
631: }
632:
633: $Apache::lonhomework::parsing_a_problem=1;
634: &init_problem_globals('problem');
635:
636: if (defined($env{'scantron.maxquest'})) {
637: $Apache::lonhomework::scantronmode=1;
638: }
639:
640: if ($target ne 'analyze') {
641: if ($env{'request.state'} eq 'construct') { &set_problem_state('0'); }
642: $Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
643: if (($env{'request.state'} eq 'construct') &&
644: defined($env{'form.problemtype'})) {
645: $Apache::lonhomework::type=$env{'form.problemtype'};
646: }
647: &Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
648: }
649: if ($Apache::lonhomework::type eq '' ) {
650: my $uri=$env{'request.uri'};
651: if ($uri=~/\.(\w+)$/) {
652: $Apache::lonhomework::type=$1;
653: &Apache::lonxml::debug("Using type of $1");
654: } else {
655: $Apache::lonhomework::type='problem';
656: &Apache::lonxml::debug("Using default type, problem, :$uri:");
657: }
658: }
659: $Apache::lonhomework::default_type = $Apache::lonhomework::type;
660:
661: &initialize_storage();
662: if ($target eq 'web') {
663: &Apache::lonxml::debug(" grading history ");
664: &Apache::lonhomework::showhash(%Apache::lonhomework::history);
665: }
666:
667: #added vars to the scripting enviroment
668: my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
669: $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
670: &Apache::run::run($expression,$safeeval);
671: my $status;
672: my $accessmsg;
673:
674: my $name= &get_resource_name($parstack,$safeeval);
675: my ($result,$form_tag_start);
676: if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
677: || $target eq 'edit') {
678: ($result,$form_tag_start) =
679: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
680: $name);
681: }
682:
683: if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
684:
685: if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
686: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
687: $target eq 'tex') {
688: #handle exam checkout
689: if ($Apache::lonhomework::type eq 'exam') {
690: my $token=
691: $Apache::lonhomework::history{"resource.0.outtoken"};
692: if (($env{'form.doescheckout'}) && (!$token)) {
693: $token=&Apache::lonxml::maketoken();
694: $Apache::lonhomework::history{"resource.0.outtoken"}=
695: $token;
696: }
697: $result.=&Apache::lonxml::printtokenheader($target,$token);
698: }
699: if ($env{'form.markaccess'}) {
700: &Apache::lonnet::set_first_access('map');
701: }
702: #handle rand seed in construction space
703: my $rndseed=&setup_rndseed($safeeval);
704: my ($symb)=&Apache::lonnet::whichuser();
705: if ($env{'request.state'} ne "construct" &&
706: ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
707: $form_tag_start.='<input type="hidden" name="rndseed" value="'.
708: $rndseed.'" />'.
709: '<input type="submit" name="resetdata"
710: value="'.&mt('New Problem Variation').'" />';
711: if (exists($env{'form.username'})) {
712: $form_tag_start.=
713: '<input type="hidden" name="username"
714: value="'.$env{'form.username'}.'" />';
715: }
716: if ($env{'request.role.adv'}) {
717: $form_tag_start.=
718: ' <label><input type="checkbox" name="showallfoils" ';
719: if (defined($env{'form.showallfoils'})) {
720: $form_tag_start.='checked="on"';
721: }
722: $form_tag_start.= ' />'.&mt(' Show All Foils').
723: '</label>';
724: }
725: $form_tag_start.='<hr />';
726: }
727:
728: ($status,$accessmsg,my $slot_name,my $slot) =
729: &Apache::lonhomework::check_slot_access('0','problem');
730: push (@Apache::inputtags::status,$status);
731:
732: my $expression='$external::datestatus="'.$status.'";';
733: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
734: &Apache::run::run($expression,$safeeval);
735: &Apache::lonxml::debug("Got $status");
736:
737: if (( $status eq 'CLOSED' ) ||
738: ( $status eq 'UNCHECKEDOUT') ||
739: ( $status eq 'NOT_YET_VIEWED') ||
740: ( $status eq 'BANNED') ||
741: ( $status eq 'UNAVAILABLE') ||
742: ( $status eq 'NOT_IN_A_SLOT') ||
743: ( $status eq 'INVALID_ACCESS')) {
744: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
745: $style);
746: if ( $target eq "web" ) {
747: my $msg;
748: if ($status eq 'UNAVAILABLE') {
749: $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
750: } elsif ($status ne 'NOT_YET_VIEWED') {
751: $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
752: }
753: if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
754: $msg.='The problem '.$accessmsg;
755: } elsif ($status eq 'UNCHECKEDOUT') {
756: $msg.=&checkout_msg();
757: } elsif ($status eq 'NOT_YET_VIEWED') {
758: $msg.=&firstaccess_msg($accessmsg,$symb);
759: } elsif ($status eq 'NOT_IN_A_SLOT') {
760: $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work.");
761: }
762: $result.=$msg.'<br />';
763: } elsif ($target eq 'tex') {
764: my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
765: : '\begin{minipage}{\textwidth}';
766: $result.='\begin{document}\noindent \vskip 1 mm '.
767: $startminipage.'\vskip 0 mm';
768: if ($status eq 'UNAVAILABLE') {
769: $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
770: } else {
771: $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
772: }
773: }
774: } elsif ($status eq 'NEEDS_CHECKIN') {
775: my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
776: $style);
777: if ($target eq 'web') {
778: $result .=
779: &Apache::bridgetask::proctor_validation_screen($slot);
780: } elsif ($target eq 'grade') {
781: &Apache::bridgetask::proctor_check_auth($slot_name,$slot,
782: 'problem');
783: }
784: } elsif ($target eq 'web') {
785: if ($status eq 'CAN_ANSWER'
786: && $slot_name ne ''
787: && $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
788: # unproctored slot access, self checkin
789: &Apache::bridgetask::check_in('problem',undef,undef,
790: $slot_name);
791: }
792: $result.="\n $form_tag_start \t".
793: '<input type="hidden" name="submitted" value="yes" />';
794: # create a page header and exit
795: if ($env{'request.state'} eq "construct") {
796: $result.= &problem_web_to_edit_header($env{'form.rndseed'});
797: }
798: # if we are viewing someone else preserve that info
799: if (defined $env{'form.grade_symb'}) {
800: foreach my $field ('symb','courseid','domain','username') {
801: $result .= '<input type="hidden" name="grade_'.$field.
802: '" value="'.$env{"form.grade_$field"}.'" />'."\n";
803: }
804: }
805: } elsif ($target eq 'tex') {
806: $result .= 'INSERTTEXFRONTMATTERHERE';
807:
808: }
809: } elsif ($target eq 'edit') {
810: $result .= $form_tag_start.&problem_edit_header();
811: $Apache::lonxml::warnings_error_header=
812: &mt("Editor Errors - these errors might not effect the running of the problem, but they will likely cause problems with further use of the Edit mode. Please use the EditXML mode to fix these errors.")."<br />";
813: my $temp=&Apache::edit::insertlist($target,$token);
814: $result.=$temp;
815: } elsif ($target eq 'modified') {
816: $result=$token->[4];
817: } else {
818: # page_start returned a starting result, delete it if we don't need it
819: $result = '';
820: }
821: return $result;
822: }
823:
824: sub end_problem {
825: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
826: my $result;
827:
828: if (!$Apache::lonxml::metamode) {
829: $result = &Apache::lonxml::endredirection(); #started in &start_problem
830: $Apache::lonxml::post_evaluate=0;
831: }
832:
833: if ($target eq 'tex') {
834: # Figure out the front matter and replace the
835: # INSERTTEXFRONTMATTERHERE in result with it. note that we do
836: # this in end_problem because whether or not we display due
837: # dates depends on whether due dates have already been
838: # displayed in the problem parts.
839:
840: my $frontmatter = '';
841: my $startminipage = '';
842: if (not $env{'form.problem_split'}=~/yes/) {
843: $startminipage = '\begin{minipage}{\textwidth}';
844: }
845: my $id = $Apache::inputtags::part;
846: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
847: my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
848: my @packages = split /,/,$packages;
849: my $allow_print_points = 0;
850: foreach my $partial_key (@packages) {
851: if ($partial_key=~m/^part_0$/) {
852: $allow_print_points=1;
853: }
854: }
855: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
856: if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
857: if (lc($env{'course.'.$env{'request.course.id'}.
858: '.disableexampointprint'}) eq 'yes') {
859: $allow_print_points=0;
860: }
861: my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
862: my $begin_doc='\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent ';
863: my $toc_line='\vskip 1 mm\noindent '.$startminipage.
864: '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
865:
866: # Figure out what the due date is and if we need to print
867: # it in the problem header. We have been logging the
868: # last due date written to file.
869:
870: my $duetime = &Apache::lonnet::EXT("resource.$id.duedate");
871: my $duedate = POSIX::strftime("%c",localtime($duetime));
872: my $temp_file;
873: my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
874:
875: # Figure out what the last printed due date is or set it
876: # to the epoch if no duedates have been printed.
877:
878: my $due_file_content = 0; # If the file does not yet exist, time is the epoch.
879: if (-e $filename) {
880: $temp_file = Apache::File->new($filename);
881: my @due_file = <$temp_file>;
882: $due_file_content = $due_file[$#due_file];
883: chomp $due_file_content;
884: }
885:
886: # We display the due date iff it is not the same as the last
887: # duedate in problem header ($due_file_content), and
888: # none of our parts displayed a duedate.
889: #
890: my $parts_with_displayduedate;
891: if (defined $Apache::outputtags::showonce{'displayduedate'}) {
892: $parts_with_displayduedate =
893: scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
894: } else {
895: $parts_with_displayduedate = 0;
896: }
897: if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
898: $temp_file = Apache::File->new('>'.$filename);
899: print $temp_file "$duetime\n";
900: if (not $env{'request.symb'} =~ m/\.page_/) {
901: if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
902: $frontmatter .= $begin_doc.
903: '\textit{Due date: '.$duedate.'} '.$toc_line;
904: } else {
905: $frontmatter.= $begin_doc.$toc_line;
906: if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
907: }
908: } else {
909: $frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\'.$startminipage;
910: }
911: } else {
912: if (not $env{'request.symb'} =~ m/\.page_/) {
913: $frontmatter .= $begin_doc.$toc_line;
914: if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
915: } else {
916: $frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
917: }
918: }
919: $result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
920: }
921:
922: my $status=$Apache::inputtags::status['-1'];
923: if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
924: $target eq 'tex') {
925: if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
926: # if part is zero, no <part>s existed, so we need to the grading
927: if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
928: &Apache::inputtags::grade;
929: } elsif ($status eq 'NEEDS_CHECKIN') {
930: # no need to grade, and don't want to hide data
931: } else {
932: # move any submission data to .hidden
933: &Apache::inputtags::hidealldata($Apache::inputtags::part);
934: }
935: } elsif ( ($target eq 'web' || $target eq 'tex') &&
936: $Apache::inputtags::part eq '0' &&
937: $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
938: # if part is zero, no <part>s existed, so we need show the current
939: # grading status
940: my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
941: $result.= $gradestatus;
942: }
943: if (
944: (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
945: ($target eq 'answer') || ($target eq 'tex')
946: ) {
947: if ($target ne 'tex' &&
948: $env{'form.answer_output_mode'} ne 'tex') {
949: $result.="</form>";
950: $result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
951: }
952: if ($target eq 'web') {
953: $result.= &Apache::loncommon::end_page({'discussion' => 1});
954: } elsif ($target eq 'tex') {
955: my $endminipage = '';
956: if (not $env{'form.problem_split'}=~/yes/) {
957: $endminipage = '\end{minipage}';
958: }
959: if ($env{'form.print_discussions'} eq 'yes') {
960: $result.=&Apache::lonxml::xmlend($target,$parser);
961: } else {
962: $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
963: if (not $env{'request.symb'} =~ m/\.page_/) {
964: $result .= $endminipage.'\end{document} ';
965: } else {
966: $result .= $endminipage;
967: }
968: }
969: }
970: }
971: if ($target eq 'grade') {
972: &Apache::lonhomework::showhash(%Apache::lonhomework::results);
973: &finalize_storage();
974: }
975: if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
976: && $env{'form.answer_output_mode'} ne 'tex') {
977: $result.=&Apache::loncommon::end_page({'discussion' => 1});
978: # normally we get it from above, but in CSTR
979: # we always show answer mode too.
980: }
981: } elsif ($target eq 'meta') {
982: if ($Apache::inputtags::part eq '0') {
983: @Apache::inputtags::response=();
984: $result=&Apache::response::mandatory_part_meta;
985: }
986: $result.=&Apache::response::meta_part_order();
987: $result.=&Apache::response::meta_response_order();
988: } elsif ($target eq 'edit') {
989: &Apache::lonxml::debug("in end_problem with $target, edit");
990: $result .= &problem_edit_footer();
991: } elsif ($target eq 'modified') {
992: $result .= $token->[2];
993: }
994:
995: if ($env{'request.state'} eq 'construct' && $target eq 'web') {
996: &Apache::inputtags::check_for_duplicate_ids();
997: }
998:
999: &reset_problem_globals('problem');
1000:
1001: return $result;
1002: }
1003:
1004:
1005: sub start_library {
1006: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1007: my ($result,$form_tag_start);
1008: if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1009: &init_problem_globals('library');
1010: $Apache::lonhomework::type='problem';
1011: }
1012: if ($target eq 'edit') {
1013: ($result,$form_tag_start)=
1014: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
1015: 'Edit');
1016: $result.=$form_tag_start.&problem_edit_header();
1017: my $temp=&Apache::edit::insertlist($target,$token);
1018: $result.=$temp;
1019: } elsif ($target eq 'modified') {
1020: $result=$token->[4];
1021: } elsif (($target eq 'web' || $target eq 'webgrade')
1022: && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1023: && $env{'request.state'} eq "construct" ) {
1024: my $name=&get_resource_name($parstack,$safeeval);
1025: ($result,$form_tag_start)=
1026: &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
1027: $name);
1028: my $rndseed=&setup_rndseed($safeeval);
1029: $result.=" \n $form_tag_start".
1030: '<input type="hidden" name="submitted" value="yes" />';
1031: $result.=&problem_web_to_edit_header($rndseed);
1032: }
1033: return $result;
1034: }
1035:
1036: sub end_library {
1037: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1038: my $result='';
1039: if ($target eq 'edit') {
1040: $result=&problem_edit_footer();
1041: } elsif ($target eq 'web'
1042: && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1043: && $env{'request.state'} eq "construct") {
1044: $result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1045: }
1046: if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1047: &reset_problem_globals('library');
1048: }
1049: return $result;
1050: }
1051:
1052: sub start_definetag {
1053: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1054:
1055: my $result;
1056:
1057: my $name = $token->[2]->{'name'};
1058: my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1059: if ($name=~/^\//) {
1060: $result=
1061: '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
1062: } else {
1063: $result=
1064: '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
1065: }
1066: $skip=~s/\</\<\;/gs;
1067: $skip=~s/\>/\>\;/gs;
1068: $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
1069: return $result;
1070: }
1071:
1072: sub end_definetag {
1073: return '';
1074: }
1075:
1076: sub start_block {
1077: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1078:
1079: my $result;
1080:
1081: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1082: $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1083: my $code = $token->[2]->{'condition'};
1084: if (defined($code) && $code ne '') {
1085: if (!$Apache::lonxml::default_homework_loaded) {
1086: &Apache::lonxml::default_homework_load($safeeval);
1087: }
1088: $result = &Apache::run::run($code,$safeeval);
1089: &Apache::lonxml::debug("block :$code: returned :$result:");
1090: } else {
1091: $result='1';
1092: }
1093: if ( ! $result ) {
1094: my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1095: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
1096: }
1097: $result='';
1098: } elsif ($target eq 'edit') {
1099: $result .=&Apache::edit::tag_start($target,$token);
1100: $result .=&Apache::edit::text_arg('Test Condition:','condition',
1101: $token,40);
1102: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1103: } elsif ($target eq 'modified') {
1104: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1105: $safeeval,'condition');
1106: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1107: }
1108: return $result;
1109: }
1110:
1111: sub end_block {
1112: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1113: my $result;
1114: if ($target eq "edit") {
1115: $result.= &Apache::edit::tag_end($target,$token,'');
1116: }
1117: return $result;
1118: }
1119:
1120: sub start_languageblock {
1121: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1122:
1123: my $result;
1124:
1125: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1126: $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1127: my $include = $token->[2]->{'include'};
1128: my $exclude = $token->[2]->{'exclude'};
1129: my %languages=&Apache::loncommon::display_languages();
1130: $result='1';
1131: if ($include) {
1132: $result='';
1133: foreach (split(/\,/,$include)) {
1134: if ($languages{$_}) { $result='1'; }
1135: }
1136: }
1137: if ($exclude) {
1138: foreach (split(/\,/,$exclude)) {
1139: if ($languages{$_}) { $result='0'; }
1140: }
1141: }
1142: if ( ! $result ) {
1143: my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
1144: $style);
1145: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
1146: }
1147: $result='';
1148: } elsif ($target eq 'edit') {
1149: $result .=&Apache::edit::tag_start($target,$token);
1150: $result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1151: $token,40);
1152: $result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1153: $token,40);
1154: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1155: } elsif ($target eq 'modified') {
1156: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1157: $safeeval,'include',
1158: 'exclude');
1159: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1160: }
1161: return $result;
1162: }
1163:
1164: sub end_languageblock {
1165: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1166: my $result;
1167: if ($target eq "edit") {
1168: $result.= &Apache::edit::tag_end($target,$token,'');
1169: }
1170: return $result;
1171: }
1172:
1173: sub start_instructorcomment {
1174: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1175:
1176: my $result;
1177:
1178: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1179: $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1180: $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
1181: if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1182: my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
1183: $parser,$style);
1184: &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
1185: }
1186: $result='';
1187: } elsif ($target eq 'edit') {
1188: $result .=&Apache::edit::tag_start($target,$token);
1189: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1190: }
1191: return $result;
1192: }
1193:
1194: sub end_instructorcomment {
1195: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1196: my $result;
1197: if ($target eq "edit") {
1198: $result.= &Apache::edit::tag_end($target,$token,'');
1199: }
1200: return $result;
1201: }
1202:
1203: sub start_while {
1204: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1205:
1206: my $result;
1207: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1208: $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1209: my $code = $token->[2]->{'condition'};
1210:
1211: push( @Apache::structuretags::whileconds, $code);
1212: if (!$Apache::lonxml::default_homework_loaded) {
1213: &Apache::lonxml::default_homework_load($safeeval);
1214: }
1215: my $result = &Apache::run::run($code,$safeeval);
1216: my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1217: push( @Apache::structuretags::whilebody, $bodytext);
1218: push( @Apache::structuretags::whileline, $token->[5]);
1219: &Apache::lonxml::debug("s code $code got -$result-");
1220: if ( $result ) {
1221: &Apache::lonxml::newparser($parser,\$bodytext);
1222: }
1223: } elsif ($target eq 'edit') {
1224: $result .=&Apache::edit::tag_start($target,$token);
1225: $result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1226: $token,40);
1227: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1228: } elsif ($target eq 'modified') {
1229: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1230: $safeeval,'condition');
1231: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1232: }
1233: return $result;
1234: }
1235:
1236: sub end_while {
1237: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1238: my $result;
1239:
1240: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1241: $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1242: my $code = pop(@Apache::structuretags::whileconds);
1243: my $bodytext = pop(@Apache::structuretags::whilebody);
1244: my $line = pop(@Apache::structuretags::whileline);
1245: my $return = &Apache::run::run($code,$safeeval);
1246: my $starttime=time;
1247: my $error=0;
1248: while ($return) {
1249: if (time-$starttime >
1250: $Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1251: $return = 0; $error=1; next;
1252: }
1253: $result.=&Apache::scripttag::xmlparse($bodytext);
1254: if ($target eq 'grade' || $target eq 'answer' ||
1255: $target eq 'analyze') {
1256: # grade/answer/analyze should produce no output but if we
1257: # are redirecting, the redirecter should know what to do
1258: # with the output
1259: if (!$Apache::lonxml::redirection) { undef($result); }
1260: }
1261: $return = &Apache::run::run($code,$safeeval);
1262: }
1263: if ($error) {
1264: &Apache::lonxml::error('<pre>'.&mt('Code ran too long. It ran for more than').' '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' '.&mt('seconds occured while running <while> on line').' '.$line.'</pre>');
1265: }
1266: } elsif ($target eq "edit") {
1267: $result.= &Apache::edit::tag_end($target,$token,'');
1268: }
1269: return $result;
1270: }
1271:
1272: # <randomlist show="1">
1273: # <tag1>..</tag1>
1274: # <tag2>..</tag2>
1275: # <tag3>..</tag3>
1276: # ...
1277: # </randomlist>
1278: sub start_randomlist {
1279: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1280: my $result;
1281: if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
1282: $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1283: my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1284: my $b_parser= HTML::LCParser->new(\$body);
1285: $b_parser->xml_mode(1);
1286: $b_parser->marked_sections(1);
1287: my $b_tok;
1288: my @randomlist;
1289: my $list_item;
1290: while($b_tok = $b_parser->get_token() ) {
1291: if($b_tok->[0] eq 'S') { # start tag
1292: # get content of the tag until matching end tag
1293: # get all text upto the matching tag
1294: # and push the content into @randomlist
1295: $list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
1296: $b_parser);
1297: $list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
1298: push(@randomlist,$list_item);
1299: # print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
1300: # $list_item</b>";
1301: }
1302: if($b_tok->[0] eq 'T') { # text
1303: # what to do with text in between tags?
1304: # print "<b>TEXT $b_tok->[1]</b><br />";
1305: }
1306: # if($b_tok->[0] eq 'E') { # end tag, should not happen
1307: # print "<b>END-TAG $b_tok->[1]</b><br />";
1308: # }
1309: }
1310: if (@randomlist) {
1311: my @idx_arr = (0 .. $#randomlist);
1312: &Apache::structuretags::shuffle(\@idx_arr);
1313: my $bodytext = '';
1314: my $show=$#randomlist;
1315: my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
1316: $showarg--;
1317: if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
1318: for(0 .. $show) {
1319: $bodytext .= "$randomlist[ $idx_arr[$_] ]";
1320: }
1321: &Apache::lonxml::newparser($parser,\$bodytext);
1322: }
1323: } elsif ($target eq 'edit' ) {
1324: $result .=&Apache::edit::tag_start($target,$token);
1325: $result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
1326: $token,5);
1327: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1328: } elsif ($target eq 'modified' ) {
1329: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1330: $safeeval,'show');
1331: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1332: }
1333: return $result;
1334: }
1335:
1336: sub shuffle {
1337: my $a=shift;
1338: my $i;
1339: if (ref($a) eq 'ARRAY' && @$a) {
1340: &Apache::response::pushrandomnumber();
1341: for($i=@$a;--$i;) {
1342: my $j=int(&Math::Random::random_uniform() * ($i+1));
1343: next if $i == $j;
1344: @$a[$i,$j] = @$a[$j,$i];
1345: }
1346: &Apache::response::poprandomnumber();
1347: }
1348: }
1349:
1350: sub end_randomlist {
1351: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1352: my $result;
1353: if ($target eq 'edit' ) {
1354: $result=&Apache::edit::tag_end($target,$token,
1355: 'End Randomly Parsed Block');
1356: }
1357: return $result;
1358: }
1359:
1360: sub ordered_show_check {
1361: my $last_part=$Apache::inputtags::partlist[-2];
1362: my $in_order=
1363: &Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
1364: my $in_order_show=1;
1365: if ($last_part ne '0' && lc($in_order) eq 'yes') {
1366: $in_order_show=&Apache::response::check_status($last_part);
1367: }
1368: return $in_order_show;
1369: }
1370:
1371: sub start_part {
1372: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1373: if (!$Apache::lonxml::metamode) {
1374: &Apache::lonxml::startredirection(); # we'll use redirection to fix up
1375: # duedates.
1376: }
1377: my $result='';
1378: my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1379: if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1380: $Apache::inputtags::part=$id;
1381: push(@Apache::inputtags::partlist,$id);
1382: @Apache::inputtags::response=();
1383: @Apache::inputtags::previous=();
1384: @Apache::inputtags::previous_version=();
1385: $Apache::lonhomework::problemstatus=&get_problem_status($id);
1386: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1387: my $newtype=&Apache::lonnet::EXT("resource.$id.type");
1388: if ($newtype) { $Apache::lonhomework::type=$newtype; }
1389: my $in_order_show=&ordered_show_check();
1390: my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1391: $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1392: &Apache::run::run($expression,$safeeval);
1393:
1394: if ($target eq 'meta') {
1395: my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
1396: return &Apache::response::mandatory_part_meta.
1397: &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1398: } elsif ($target eq 'web' || $target eq 'grade' ||
1399: $target eq 'answer' || $target eq 'tex') {
1400: if ($hidden || !$in_order_show) {
1401: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1402: } else {
1403: my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
1404: push (@Apache::inputtags::status,$status);
1405: my $expression='$external::datestatus="'.$status.'";';
1406: $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
1407: &Apache::run::run($expression,$safeeval);
1408: if ($env{'request.state'} eq 'construct') {
1409: &set_problem_state($Apache::inputtags::part);
1410: }
1411: if (( $status eq 'CLOSED' ) ||
1412: ( $status eq 'UNCHECKEDOUT') ||
1413: ( $status eq 'NOT_YET_VIEWED') ||
1414: ( $status eq 'BANNED') ||
1415: ( $status eq 'UNAVAILABLE') ||
1416: ( $status eq 'INVALID_ACCESS')) {
1417: my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
1418: $style);
1419: if ( $target eq "web" ) {
1420: $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1421: } elsif ( $target eq 'tex' ) {
1422: if (not $env{'form.problem_split'}=~/yes/) {
1423: $result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1424: } else {
1425: $result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1426: }
1427: }
1428: } else {
1429: if ($target eq 'tex') {
1430: if (not $env{'form.problem_split'}=~/yes/) {
1431: if ($$tagstack[-2] eq 'td') {
1432: $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
1433: } else {
1434: $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
1435: }
1436: }
1437: my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1438: my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1439: my @allkeys = split /,/,$allkeys;
1440: my $allow_print_points = 0;
1441: foreach my $partial_key (@allkeys) {
1442: if ($partial_key=~m/^part_(.*)$/) {
1443: if ($1 ne '0') {$allow_print_points=1;}
1444: }
1445: }
1446: my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
1447: if (defined($maxtries) && $maxtries < 0) {
1448: $allow_print_points=0;
1449: }
1450: if (lc($env{'course.'.$env{'request.course.id'}.
1451: '.disableexampointprint'}) eq 'yes') {
1452: $allow_print_points=0;
1453: }
1454: if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1455: } elsif ($target eq 'web') {
1456: $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
1457: }
1458: }
1459: }
1460: } elsif ($target eq 'edit') {
1461: $result.=&Apache::edit::tag_start($target,$token);
1462: $result.=&Apache::edit::text_arg('Part ID:','id',$token).
1463: &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1464: ' '.
1465: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1466: &Apache::edit::end_row().&Apache::edit::start_spanning_row();
1467: } elsif ($target eq 'modified') {
1468: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1469: $safeeval,'id','display');
1470: if ($constructtag) {
1471: #limiting ids to only letters numbers, and space
1472: $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1473: $result = &Apache::edit::rebuild_tag($token);
1474: }
1475: }
1476: return $result;
1477: }
1478:
1479: sub end_part {
1480: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1481: &Apache::lonxml::debug("in end_part $target ");
1482: my $status=$Apache::inputtags::status['-1'];
1483: my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1484: my $in_order_show=&ordered_show_check();
1485: my $result;
1486: if (!$Apache::lonxml::metamode) {
1487: $result = &Apache::lonxml::endredirection(); # started in &start_part
1488: $Apache::lonxml::post_evaluate=0;
1489: }
1490: if ($target eq 'grade') {
1491: if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1492: !$hidden && $in_order_show) {
1493: $result.=&Apache::inputtags::grade;
1494: } else {
1495: # move any submission data to .hidden
1496: &Apache::inputtags::hidealldata($Apache::inputtags::part);
1497: }
1498: } elsif (($target eq 'web' || $target eq 'tex') &&
1499: !$hidden && $in_order_show) {
1500: my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
1501: $target);
1502: if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
1503: $gradestatus='';
1504: }
1505: $result.=$gradestatus;
1506: if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';}
1507: } elsif ($target eq 'edit') {
1508: $result.=&Apache::edit::end_table();
1509: } elsif ($target eq 'modified') {
1510: $result .= $token->[2];
1511: }
1512: pop @Apache::inputtags::status;
1513: $Apache::inputtags::part='';
1514: $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1515: return $result;
1516: }
1517:
1518: sub start_preduedate {
1519: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1520: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1521: $target eq 'tex' || $target eq 'webgrade') {
1522: &Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1523: if (!$Apache::lonhomework::scantronmode &&
1524: $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1525: $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
1526: &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1527: &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1528: }
1529: }
1530: return '';
1531: }
1532:
1533: sub end_preduedate {
1534: return '';
1535: }
1536:
1537: # In all the modes where <postanswerdate> text is
1538: # displayable, all we do is eat up the text between the start/stop
1539: # tags if the conditions are not right to display it.
1540: sub start_postanswerdate {
1541: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1542: my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
1543: &Apache::lonnet::allowed('pav',
1544: $env{'request.course.id'}.'/'.$env{'request.course.sec'});
1545: if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
1546: $target eq 'tex' ) {
1547: if ($Apache::lonhomework::scantronmode ||
1548: $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
1549: (($target eq 'tex') && !$pav)) {
1550: &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1551: }
1552: }
1553: return '';
1554: }
1555:
1556: sub end_postanswerdate {
1557: return '';
1558: }
1559:
1560: sub start_notsolved {
1561: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1562: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1563: $target eq 'tex' || $target eq 'webgrade') {
1564: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1565: &Apache::lonxml::debug("not solved has :$gradestatus:");
1566: if ($gradestatus =~ /^correct/ &&
1567: &Apache::response::show_answer()) {
1568: &Apache::lonxml::debug("skipping");
1569: &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1570: }
1571: }
1572: return '';
1573: }
1574:
1575: sub end_notsolved {
1576: return '';
1577: }
1578:
1579: sub start_solved {
1580: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1581: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1582: $target eq 'tex') {
1583: my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1584: if ($gradestatus !~ /^correct/ ||
1585: !&Apache::response::show_answer()) {
1586: &Apache::lonxml::get_all_text("/solved",$parser,$style);
1587: }
1588: }
1589: return '';
1590: }
1591:
1592: sub end_solved {
1593: return '';
1594: }
1595:
1596: sub start_problemtype {
1597: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1598: my $result;
1599: if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1600: $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1601: my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
1602: if (!defined($mode)) { $mode='show'; }
1603: my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
1604: my $found=0;
1605: foreach my $type (split(',',$for)) {
1606: if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
1607: }
1608: if ($mode eq 'show' && !$found) {
1609: &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1610: }
1611: if ($mode eq 'hide' && $found) {
1612: &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1613: }
1614: } elsif ($target eq 'edit') {
1615: $result .=&Apache::edit::tag_start($target,$token);
1616: $result.=&Apache::edit::select_arg('Mode:','mode',
1617: [['show','Show'],
1618: ['hide','Hide']]
1619: ,$token);
1620: $result .=&Apache::edit::checked_arg('When used as type(s):','for',
1621: [ ['exam','Exam/Quiz Problem'],
1622: ['survey','Survey'],
1623: ['problem','Homework Problem'] ]
1624: ,$token);
1625: $result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
1626: } elsif ($target eq 'modified') {
1627: my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1628: $safeeval,'mode','for');
1629: if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1630: }
1631: return $result;
1632: }
1633:
1634: sub end_problemtype {
1635: return '';
1636: }
1637:
1638: sub start_startouttext {
1639: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1640: my @result=(''.'');
1641: if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1642: return (@result);
1643: }
1644:
1645: sub end_startouttext {
1646: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1647: my $result='';
1648: my $text='';
1649:
1650: if ($target eq 'edit') {
1651: $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1652: $result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
1653: <td>".&mt('Delete:').
1654: &Apache::edit::deletelist($target,$token)
1655: ."</td>
1656: <td>".
1657: &Apache::edit::insertlist($target,$token).
1658: '</td><td align="right" valign="top">' .
1659: &Apache::loncommon::helpLatexCheatsheet().
1660: &Apache::edit::end_row().
1661: &Apache::edit::start_spanning_row()."\n".
1662: &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1663: }
1664: if ($target eq 'modified') {
1665: $result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1666: }
1667: if ($target eq 'tex') {
1668: $result .= '\noindent ';
1669: }
1670: return $result;
1671: }
1672:
1673: sub start_endouttext {
1674: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1675: my $result='';
1676: if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
1677: if ($target eq "modified") {
1678: $result='<endouttext />'.
1679: &Apache::edit::handle_insertafter('startouttext');
1680: }
1681: return $result;
1682: }
1683:
1684: sub end_endouttext {
1685: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1686: my @result=('','');
1687: if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
1688: return (@result);
1689: }
1690:
1691: sub delete_startouttext {
1692: my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1693: # my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1694: my $text=$$parser['-1']->get_text("/endouttext");
1695: my $ntoken=$$parser['-1']->get_token();
1696: &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
1697: &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
1698: # Deleting 2 parallel tag pairs, but we need the numbers later to look like
1699: # they did the last time round
1700: &Apache::lonxml::increasedepth($ntoken);
1701: &Apache::lonxml::decreasedepth($ntoken);
1702: return 1;
1703: }
1704:
1705: sub start_simpleeditbutton {
1706: my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1707: my $result='';
1708: if (($env{'form.simple_edit_button'} ne 'off') &&
1709: ($target eq 'web') &&
1710: (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1711: my $url=$env{'request.noversionuri'};
1712: $url=~s/\?.*$//;
1713: my ($symb) = &Apache::lonnet::whichuser();
1714: $result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1715: '<a href="'.$url.'/smpedit?symb='.&escape($symb).'">'.&mt('Edit').'</a> - '.&mt('Note: it can take up to 10 minutes for changes to take effect for all users.').
1716: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1717: }
1718: return $result;
1719: }
1720:
1721: sub end_simpleeditbutton {
1722: return '';
1723: }
1724:
1725: 1;
1726: __END__
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