Annotation of loncom/homework/structuretags.pm, revision 1.321

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.321   ! albertel    4: # $Id: structuretags.pm,v 1.320 2005/11/10 22:01:30 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: #
1.254     www        28: ###
1.54      www        29: 
1.133     sakharuk   30: 
1.1       albertel   31: package Apache::structuretags; 
                     32: 
                     33: use strict;
                     34: use Apache::lonnet;
1.101     sakharuk   35: use Apache::File();
1.147     www        36: use Apache::lonmenu;
1.210     albertel   37: use Apache::lonlocal;
1.231     sakharuk   38: use Apache::lonxml;
1.267     albertel   39: use Time::HiRes qw( gettimeofday tv_interval );
1.78      harris41   40: BEGIN {
1.248     albertel   41:     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startouttext','endouttext','simpleeditbutton','definetag'));
1.10      albertel   42: }
                     43: 
                     44: sub start_web {
1.159     albertel   45:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.200     albertel   46:     my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
                     47:     if ($target eq 'web') {
                     48: 	return $bodytext;
1.159     albertel   49:     }
                     50:     return '';
1.10      albertel   51: }
                     52: 
                     53: sub end_web {
1.44      ng         54:     return '';
1.10      albertel   55: }
                     56: 
                     57: sub start_tex {
1.159     albertel   58:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.198     sakharuk   59:     my $result='';
1.200     albertel   60:     my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
                     61:     if ($target eq 'tex') {
                     62: 	return $bodytext.' ';
1.159     albertel   63:     }
1.198     sakharuk   64:     return $result;;
1.10      albertel   65: }
                     66: 
                     67: sub end_tex {
1.44      ng         68:     return '';
1.9       albertel   69: }
                     70: 
1.290     albertel   71: sub body_tag_start {
                     72:     my ($target,$background,$bgcolor)=@_;
                     73:     my $body_tag_start='<body onload="'.&Apache::lonmenu::loadevents().'" '.
                     74: 	'onunload="'.&Apache::lonmenu::unloadevents().'" ';
                     75:     if ($env{'browser.imagesuppress'} eq 'on') { $background=''; }
                     76:     if ($background) {
1.306     albertel   77: 	&Apache::lonxml::extlink($background);
1.290     albertel   78: 	$body_tag_start.='background="'.$background.'" ';
                     79:     } else {
                     80: 	if (($bgcolor) && ($env{'browser.blackwhite'} ne 'on')) {
                     81: 	    $body_tag_start.='bgcolor="'.$bgcolor.'" ';
                     82: 	} else {
                     83: 	    $body_tag_start.='bgcolor="#ffffff"';
                     84: 	}
                     85:     }
                     86:     if ($env{'browser.fontenhance'} eq 'on') {
                     87: 	$body_tag_start.=' style="font-size: x-large;" ';
                     88:     }
                     89:     $body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
1.297     albertel   90:     
                     91:     &Apache::lontexconvert::jsMath_reset();
1.290     albertel   92:     if ($env{'environment.texengine'} eq 'jsMath') {
1.297     albertel   93: 	$body_tag_start.=&Apache::lontexconvert::jsMath_header();
1.290     albertel   94:     }
                     95:     return $body_tag_start;
                     96: }
1.291     albertel   97: 
1.48      albertel   98: sub page_start {
1.159     albertel   99:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    100:     my %found;
1.207     albertel  101:     foreach my $taginside (@$tagstack) {
1.159     albertel  102: 	foreach my $taglookedfor ('html','body','form') {
                    103: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                    104: 	}
                    105:     }
                    106: 
                    107:     my $result;
                    108:     my $head_tag_start;
                    109:     if (!defined($found{'html'})) {
                    110: 	$result=&Apache::londefdef::start_html($target,$token,$tagstack,
                    111: 					       $parstack,$parser,$safeeval);
1.254     www       112: 	$head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target).
1.261     www       113: 	    &Apache::lonhtmlcommon::htmlareaheaders().
1.270     albertel  114: 	    &Apache::lonhtmlcommon::spellheader().
                    115: 	    &Apache::lonxml::fontsettings();     
1.159     albertel  116:     }
                    117:     my $body_tag_start;
1.318     albertel  118:     if (!defined($found{'body'}) && $env{'request.state'} eq 'construct') {
                    119: 	if ($env{'environment.remote'} eq 'off') {
                    120: 	    if ($target eq 'web' || $target eq 'edit') {
                    121: 		$body_tag_start=&Apache::loncommon::bodytag();
                    122: 		$body_tag_start.=&Apache::lonxml::message_location();
                    123: 	    }
                    124: 	} else {
                    125: 	    if ($target eq 'web' || $target eq 'edit') {
                    126: 		$body_tag_start=&Apache::loncommon::bodytag(undef,undef,undef,1);
                    127: 		$body_tag_start.=&Apache::lonxml::message_location();
                    128: 	    }
1.297     albertel  129: 	}
1.272     albertel  130:     } elsif (!defined($found{'body'})) {
1.159     albertel  131: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    132: 						  $safeeval);
1.290     albertel  133: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    134: 					       $safeeval);
1.299     albertel  135: 	$body_tag_start=&body_tag_start($target,$background,$bgcolor);
1.291     albertel  136: 	if ( ($target eq 'web' || $target eq 'webgrade')
                    137: 	     && $env{'request.state'} ne 'construct') {
1.165     albertel  138: 	    my ($symb,undef,undef,undef,$publicuser)=
                    139: 		&Apache::lonxml::whichuser();
                    140: 	    if ($symb eq '' && !$publicuser) {
1.159     albertel  141: 		my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
1.211     albertel  142: 		$help=&mt("Browsing resource, all submissions are temporary.")."<br />";
1.159     albertel  143: 		$body_tag_start.=$help;
                    144: 	    }
                    145: 	}
1.245     albertel  146: 	$body_tag_start.=&Apache::lonxml::message_location();
1.159     albertel  147:     }
                    148:     my $form_tag_start;
                    149:     if (!defined($found{'form'})) {
1.281     albertel  150: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="POST" action="';
1.284     albertel  151: 	my $uri=$env{'request.uri'};
                    152: 	if ($env{'request.enc'}) { $uri=&Apache::lonenc::encrypted($uri); }
1.271     albertel  153: 	$form_tag_start.=$uri.'">';
1.159     albertel  154:     }
                    155:     return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.105     albertel  156: }
                    157: 
1.141     matthew   158: #use Time::HiRes();
1.105     albertel  159: sub get_resource_name {
1.159     albertel  160:     my ($parstack,$safeeval)=@_;
1.204     albertel  161:     if (defined($Apache::lonhomework::name)) {
                    162: 	return $Apache::lonhomework::name;
                    163:     }
1.279     albertel  164:     my ($symb)=&Apache::lonxml::whichuser();
                    165:     my $name=&Apache::lonnet::gettitle($symb);
1.159     albertel  166:     if ($name eq '') {
                    167: 	$name=&Apache::lonnet::EXT('resource.title');
                    168: 	if ($name eq 'con_lost') { $name = ''; }
                    169:     }
1.204     albertel  170:     if ($name!~/\S+/) {
1.284     albertel  171: 	$name=$env{'request.uri'};
1.205     albertel  172: 	$name=~s-.*/([^/]+)$-$1-;
1.204     albertel  173:     }
1.159     albertel  174:     $Apache::lonhomework::name=$name;
                    175:     return $name;
1.105     albertel  176: }
                    177: 
                    178: sub setup_rndseed {
1.159     albertel  179:     my ($safeeval)=@_;
                    180:     my $rndseed;
1.162     albertel  181:     my ($symb)=&Apache::lonxml::whichuser();
1.284     albertel  182:     if ($env{'request.state'} eq "construct" || $symb eq '' ||
1.247     albertel  183:           $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       184: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  185: 						['rndseed']);
1.284     albertel  186: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  187: 	if (!$rndseed) {
1.162     albertel  188: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    189: 	    if (!$rndseed) {
                    190: 		$rndseed=time;
                    191: 	    }
1.284     albertel  192: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  193: 	}
1.284     albertel  194: 	if ($env{'form.resetdata'} eq &mt('New Problem Variation') ||
                    195: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  196: 	    srand(time);
                    197: 	    $rndseed=int(rand(2100000000));
1.284     albertel  198: 	    $env{'form.rndseed'}=$rndseed;
                    199: 	    delete($env{'form.resetdata'});
                    200: 	    delete($env{'form.newrandomization'});
1.159     albertel  201: 	}
1.187     albertel  202: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
1.307     albertel  203: 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
1.187     albertel  204:         }
1.247     albertel  205:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    206: 	   $rndseed=&Apache::lonnet::rndseed();
                    207: 	}
1.221     albertel  208: 	if ($safeeval) {
                    209: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  210: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  211: 	}
1.159     albertel  212:     }
                    213:     return $rndseed;
1.105     albertel  214: }
                    215: 
1.268     albertel  216: sub remember_problem_state {
                    217:     return '
1.284     albertel  218:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    219:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    220:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  221: }
                    222: 
1.105     albertel  223: sub problem_edit_header {
1.268     albertel  224:     return '<input type="hidden" name="submitted" value="edit" />'.
                    225: 	&Apache::structuretags::remember_problem_state().'
1.210     albertel  226:        <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
1.243     matthew   227:        <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
                    228:        <input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
                    229:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> <hr />
                    230:        <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes and Edit').'" />
                    231:        <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
1.260     albertel  232:        &Apache::loncommon::help_open_menu('','Problem Editing Help','Problem_Editor_XML_Index','',5,'Authoring',undef,undef,undef,'Problem Editing Help')
                    233:        .'</td></tr></table>'.
1.282     albertel  234:        '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  235: }
                    236: 
                    237: sub problem_edit_footer {
1.210     albertel  238:     return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
1.255     www       239:     <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />'.
                    240:     &Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields).
1.280     albertel  241:     "\n</form>\n".&Apache::loncommon::endbodytag()."\n</html>";
1.105     albertel  242: }
                    243: 
1.235     albertel  244: sub option {
                    245:     my ($value,$name) = @_;
                    246:     my $result ="<option value='".$value."' ";
1.284     albertel  247:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  248: 	$result.=" selected='on' ";
                    249:     }
                    250:     $result.='>';
                    251:     return $result;
                    252: }
                    253: 
1.105     albertel  254: sub problem_web_to_edit_header {
1.159     albertel  255:     my ($rndseed)=@_;
1.313     albertel  256:     my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />';
                    257:     if (!$Apache::lonhomework::parsing_a_task) {
                    258: 	$result .= '<input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />';
                    259:     }
                    260:     $result .= '<input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
1.243     matthew   261:              <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    262:              <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
1.210     albertel  263:              <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
1.270     albertel  264:               <input type="text" name="rndseed" size="10" value="'.
1.175     albertel  265: 	       $rndseed.'"
1.270     albertel  266:            onchange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
1.281     albertel  267:              <label><input type="checkbox" name="showallfoils" ';
1.315     albertel  268:     my $show_all_foils_text = 
                    269: 	($Apache::lonhomework::parsing_a_task) ?
                    270: 	&mt('&nbsp;Show&nbsp;All&nbsp;Instances')
                    271: 	: &mt('&nbsp;Show&nbsp;All&nbsp;Foils');
                    272: 
1.284     albertel  273:     if (defined($env{'form.showallfoils'})) { $result.='checked="on"'; }
1.315     albertel  274:     $result.= ' />'.$show_all_foils_text.
1.228     www       275: 	&Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
1.281     albertel  276: 	'</label><hr />';
1.313     albertel  277:     if (!$Apache::lonhomework::parsing_a_task) {
                    278: 	$result.="
1.235     albertel  279: <nobr>
                    280: Problem Status:
                    281: <select name='problemstate'>
1.270     albertel  282:   <option value=''></option>
1.235     albertel  283:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    284:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    285:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    286:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    287:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    288: </select>
                    289: </nobr>
                    290: <nobr>
                    291: Problem Type:
                    292: <select name='problemtype'>
1.270     albertel  293:   <option value=''></option>
1.242     albertel  294:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
                    295:   ".&option('problem','problemtype').&mt("Homework problem")."</option>
                    296:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.235     albertel  297: </select>
                    298: </nobr>
                    299: <nobr>
                    300: Feedback Mode:
                    301: <select name='problemstatus'>
                    302:   <option value=''></option>
1.242     albertel  303:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
                    304:   ".&option('no', 'problemstatus').&mt("Don't Show Feedback")."</option>
1.235     albertel  305: </select>
                    306: </nobr>
1.242     albertel  307: <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
1.235     albertel  308: <hr />";
1.313     albertel  309: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    310: 	if (!$numtoanalyze) { $numtoanalyze=20; }
                    311: 	$result.= '<input type="submit" name="problemmode" value='.
                    312: 	    &mt('"Calculate answers').'" /> for
1.136     albertel  313:              <input type="text" name="numtoanalyze" value="'.
1.210     albertel  314: 	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
                    315: 	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
1.176     albertel  316: 						     '',undef,undef,300).
1.210     albertel  317: 						     '<hr />';
1.313     albertel  318:     }
1.159     albertel  319:     return $result;
1.48      albertel  320: }
                    321: 
1.65      albertel  322: sub initialize_storage {
1.159     albertel  323:     %Apache::lonhomework::results=();
1.162     albertel  324:     %Apache::lonhomework::history=();
1.159     albertel  325:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.284     albertel  326:     if ($env{'request.state'} eq 'construct' || $symb eq '') {
1.159     albertel  327: 	%Apache::lonhomework::history=
1.284     albertel  328: 	    &Apache::lonnet::tmprestore($env{'request.uri'},'',$domain,$name);
1.159     albertel  329: 	my ($temp)=keys %Apache::lonhomework::history ;
                    330: 	&Apache::lonxml::debug("Return message of $temp");
                    331:     } else {
                    332: 	%Apache::lonhomework::history=
                    333: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    334:     }
                    335:     #ignore error conditions
1.67      albertel  336:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  337:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  338: }
                    339: 
                    340: # -------------------------------------------------------------finalize_storage
                    341: # Stores away the result has to a student's environment
                    342: # checks form.grade_ for specific values, other wises stores
                    343: # to the running users environment
1.285     raeburn   344: # Will increment totals for attempts, students, and corrects
                    345: # if running user has student role.  
1.65      albertel  346: sub finalize_storage {
1.159     albertel  347:     my $result;
1.289     albertel  348:     if (%Apache::lonhomework::results) {
1.159     albertel  349: 	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.284     albertel  350: 	if ($env{'request.state'} eq 'construct' || $symb eq '') {
                    351: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  352: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.284     albertel  353: 					$env{'request.uri'},'',$domain,$name);
1.159     albertel  354: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    355: 	} else {
                    356: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    357: 					    $symb,$courseid,$domain,$name);
                    358: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   359:             if ($env{'request.role'} =~/^st/) {
                    360:                 &store_aggregates($symb,$courseid);
                    361:             }
1.159     albertel  362: 	}
1.67      albertel  363:     }
1.159     albertel  364:     return $result;
1.65      albertel  365: }
1.289     albertel  366: use Data::Dumper;
1.65      albertel  367: 
1.285     raeburn   368: # -------------------------------------------------------------store_aggregates
                    369: # Sends hash of values to be incremented in nohist_resourcetracker.db
                    370: # for the course. Increments total number of attempts, unique students 
                    371: # and corrects for each part for an instance of a problem, as appropriate.
                    372: sub store_aggregates {
                    373:     my ($symb,$courseid) = @_;
1.286     albertel  374:     my %aggregate;
                    375:     my @parts;
1.288     albertel  376:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    377:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  378:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  379:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  380:             push(@parts, $1);
1.285     raeburn   381:         }
                    382:     }
1.286     albertel  383:     foreach my $part (@parts) {
                    384:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    385: 	    eq 'APPROX_ANS' ||
                    386: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    387: 	    eq 'EXACT_ANS') {
1.287     albertel  388:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   389:         }
1.286     albertel  390:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  391:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   392:         } else {
1.293     albertel  393:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   394:             if ($last_reset) {
1.293     albertel  395:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   396:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    397:                 }
                    398:             }
1.285     raeburn   399:         }
1.287     albertel  400:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   401:     }
1.292     raeburn   402:     if (keys (%aggregate) > 0) {
1.289     albertel  403: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   404:                             $cdomain,$cname);
                    405:     }
                    406: }
1.289     albertel  407: 
1.65      albertel  408: sub checkout_msg {
1.211     albertel  409:     my %lt=&Apache::lonlocal::texthash( 
                    410: 		'resource'=>'The resource needs to be checked out',
                    411: 		'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.',
                    412:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    413:                 'checkout'=>'Check out Exam for Viewing',
                    414: 		'checkout?'=>'Check out Exam?');
1.159     albertel  415:     return (<<ENDCHECKOUT);
1.211     albertel  416: <h2>$lt{'resource'}</h2>
                    417:     <p>$lt{'id_expln'}</p>
                    418: <font color="red">
                    419: <p>$lt{'warning'}</p>
1.91      albertel  420: </font>
1.284     albertel  421: <form name="checkout" method="POST" action="$env{'request.uri'}">
1.91      albertel  422: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  423: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  424: </form>
                    425: ENDCHECKOUT
                    426: }
                    427: 
1.252     albertel  428: sub firstaccess_msg {
1.253     albertel  429:     my ($time,$symb)=@_;
                    430:     my ($map)=&Apache::lonnet::decode_symb($symb);
                    431:     my $foldertitle=&Apache::lonnet::gettitle($map);
                    432:     &Apache::lonxml::debug("map is $map title is $foldertitle");
1.252     albertel  433:     return (<<ENDCHECKOUT);
1.253     albertel  434: <h2>The resources in "$foldertitle" are open for a limited time. Once you click the 'Show Resource' button below you have $time to complete all resources "$foldertitle".</h2>
1.284     albertel  435: <form name="markaccess" method="POST" action="$env{'request.uri'}">
1.252     albertel  436: <input type="hidden" name="markaccess" value="yes" />
                    437: <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
                    438: </form>
                    439: ENDCHECKOUT
                    440: }
                    441: 
1.204     albertel  442: sub init_problem_globals {
                    443:     my ($type)=@_;
                    444:     #initialize globals
1.308     foxr      445:     #   For problems, we start out in part 0 (outside a <part> tag).
                    446:     #   and part 0 is used to describe the main body of the <problem>
                    447:     #
1.204     albertel  448:     if ($type eq 'problem') {
                    449: 	$Apache::inputtags::part='0';
                    450: 	@Apache::inputtags::partlist=('0');
1.266     albertel  451: 	$Apache::lonhomework::problemstatus=&get_problem_status('0');
                    452: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      453: 
1.266     albertel  454:     } elsif ($type eq 'library') {
1.204     albertel  455: 	$Apache::inputtags::part='';
                    456: 	@Apache::inputtags::partlist=();
                    457: 	$Apache::lonhomework::problemstatus='';	
1.266     albertel  458: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      459: 
1.304     albertel  460:     } elsif ($type eq 'Task') {
                    461: 	$Apache::inputtags::part='0';
                    462: 	@Apache::inputtags::partlist=('0');
                    463: 	$Apache::lonhomework::problemstatus='';	
                    464: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  465:     }
                    466:     @Apache::inputtags::responselist = ();
                    467:     @Apache::inputtags::importlist = ();
                    468:     @Apache::inputtags::previous=();
                    469:     @Apache::inputtags::previous_version=();
                    470:     $Apache::structuretags::printanswer='No';
                    471:     @Apache::structuretags::whileconds=();
                    472:     @Apache::structuretags::whilebody=();
                    473:     @Apache::structuretags::whileline=();
                    474:     $Apache::lonhomework::scantronmode=0;
                    475:     undef($Apache::lonhomework::name);
                    476: 
                    477: }
                    478: 
                    479: sub reset_problem_globals {
                    480:     my ($type)=@_;
                    481:     undef(%Apache::lonhomework::history);
                    482:     undef(%Apache::lonhomework::results);
                    483:     undef($Apache::inputtags::part);
1.208     albertel  484: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    485: #detect if we try to do 2 problems in one file
                    486: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  487:     undef($Apache::lonhomework::name);
                    488: }
                    489: 
1.241     albertel  490: sub set_problem_state {
1.240     albertel  491:     my ($part)=@_;
1.284     albertel  492:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  493: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    494: 	    'correct_by_student';
                    495:     }
                    496: }
                    497: 
1.241     albertel  498: sub get_problem_status {
                    499:     my ($part)=@_;
1.267     albertel  500:     my $problem_status;
1.284     albertel  501:     if ($env{'request.state'} eq 'construct' &&
                    502: 	defined($env{'form.problemstatus'})) {
                    503: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  504:     } else {
                    505: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    506: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  507: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  508:     }
                    509:     return $problem_status;
                    510: }
                    511: 
1.9       albertel  512: sub start_problem {
1.159     albertel  513:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19      albertel  514: 
1.311     foxr      515:     # We'll use the redirection to fix up printing of duedates.
1.321   ! albertel  516:     if (!$Apache::lonxml::metamode) {
        !           517: 	&Apache::lonxml::startredirection();
        !           518:     }
1.311     foxr      519: 
1.308     foxr      520:     # Problems don't nest and we don't allow more than one <problem> in
                    521:     # a .problem file.
                    522:     #
1.184     albertel  523:     if ( $Apache::inputtags::part ne '' ||
                    524: 	 $Apache::lonhomework::parsing_a_problem) {
                    525: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
                    526: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
1.159     albertel  527: 	return '';
                    528:     }
1.184     albertel  529: 
                    530:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  531:     &init_problem_globals('problem');
1.166     albertel  532: 
1.284     albertel  533:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  534: 	$Apache::lonhomework::scantronmode=1;
                    535:     }
1.161     albertel  536: 
1.246     albertel  537:     &initialize_storage();
1.159     albertel  538:     if ($target ne 'analyze') {
                    539: 	if ($target eq 'web') {
                    540: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
1.238     albertel  541: 	}
1.284     albertel  542:        	if ($env{'request.state'} eq 'construct') { &set_problem_state('0'); }
1.159     albertel  543: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.284     albertel  544: 	if (($env{'request.state'} eq 'construct') &&
                    545: 	    defined($env{'form.problemtype'})) {
                    546: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  547: 	}
1.240     albertel  548: 	&Apache::lonxml::debug("Found this to be of type :$Apache::ltonhomework::type:");
1.159     albertel  549:     }
1.164     albertel  550:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  551: 	my $uri=$env{'request.uri'};
1.159     albertel  552: 	if ($uri=~/\.(\w+)$/) {
                    553: 	    $Apache::lonhomework::type=$1;
                    554: 	    &Apache::lonxml::debug("Using type of $1");
                    555: 	} else {
                    556: 	    $Apache::lonhomework::type='problem';
                    557: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    558: 	}
1.87      albertel  559:     }
1.301     albertel  560:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       561: 
1.159     albertel  562:     #added vars to the scripting enviroment
1.213     albertel  563:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  564:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  565:     &Apache::run::run($expression,$safeeval);
1.159     albertel  566:     my $status;
                    567:     my $accessmsg;
                    568: 
                    569:     #should get back a <html> or the neccesary stuff to start XML/MathML
                    570:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    571: 	&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
1.284     albertel  572:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  573: 
                    574:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    575:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    576: 	$target eq 'tex') {
                    577: 	#handle exam checkout
                    578: 	if ($Apache::lonhomework::type eq 'exam') {
                    579: 	    my $token=
                    580: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  581: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  582: 		$token=&Apache::lonxml::maketoken();
                    583: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    584: 		    $token;
                    585: 	    }
                    586: 	    $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  587: 	}
1.284     albertel  588: 	if ($env{'form.markaccess'}) {
1.252     albertel  589: 	    &Apache::lonnet::set_first_access('map');
                    590: 	}
1.159     albertel  591: 	#handle rand seed in construction space
                    592: 	my $rndseed=&setup_rndseed($safeeval);
1.162     albertel  593: 	my ($symb)=&Apache::lonxml::whichuser();
1.284     albertel  594: 	if ($env{'request.state'} ne "construct" && $symb eq '') {
1.162     albertel  595: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    596: 		$rndseed.'" />'.
                    597: 		    '<input type="submit" name="resetdata"
1.211     albertel  598:                              value="'.&mt('New Problem Variation').'" />'.
1.164     albertel  599: 		    '<input type="hidden" name="username"
1.284     albertel  600:                              value="'.$env{'form.username'}.'" />';
                    601: 	    if ($env{'user.adv'}) {
1.267     albertel  602: 		$form_tag_start.=
1.300     albertel  603: 		    ' <label><input type="checkbox" name="showallfoils" ';
1.284     albertel  604: 		if (defined($env{'form.showallfoils'})) {
1.267     albertel  605: 		    $form_tag_start.='checked="on"';
                    606: 		}
1.300     albertel  607: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    608: 		    '</label>';
1.267     albertel  609: 	    }
                    610: 	    $form_tag_start.='<hr />';
1.162     albertel  611: 	}
1.159     albertel  612: 	($status,$accessmsg) = &Apache::lonhomework::check_access('0');
                    613: 	push (@Apache::inputtags::status,$status);
                    614: 	my $expression='$external::datestatus="'.$status.'";';
                    615: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    616: 	&Apache::run::run($expression,$safeeval);
                    617: 	&Apache::lonxml::debug("Got $status");
                    618: 	if (( $status eq 'CLOSED' ) ||
                    619: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  620: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  621: 	    ( $status eq 'BANNED') ||
1.216     albertel  622: 	    ( $status eq 'UNAVAILABLE') ||
                    623: 	    ( $status eq 'INVALID_ACCESS')) {
1.159     albertel  624: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
                    625: 	    if ( $target eq "web" ) {
                    626: 		$result.= $head_tag_start.'</head>';
                    627: 		my $msg=$body_tag_start;
                    628: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  629: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  630: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  631: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  632: 		}
1.216     albertel  633: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.159     albertel  634: 		    $msg.='The problem '.$accessmsg;
                    635: 		} elsif ($status eq 'UNCHECKEDOUT') {
                    636: 		    $msg.=&checkout_msg;
1.252     albertel  637: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  638: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.159     albertel  639: 		}
                    640: 		$result.=$msg.'<br />';
                    641: 	    } elsif ($target eq 'tex') {
                    642: 		$result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
                    643: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  644: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  645: 		} else {
1.211     albertel  646: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  647: 		}
                    648: 	    }
                    649: 	} elsif ($target eq 'web') {
                    650: 	    my $name= &get_resource_name($parstack,$safeeval);
1.227     albertel  651: 	    $result.="$head_tag_start<title>$name</title></head>
1.158     sakharuk  652:               $body_tag_start \n $form_tag_start".	
1.227     albertel  653: 	      '<input type="hidden" name="submitted" value="yes" />';
                    654: 	    # create a page header and exit
1.284     albertel  655: 	    if ($env{'request.state'} eq "construct") {
                    656: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.227     albertel  657: 	    }
                    658: 	    # if we are viewing someone else preserve that info
1.284     albertel  659: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel  660: 		foreach my $field ('symb','courseid','domain','username') {
                    661: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel  662: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel  663: 		}
                    664: 	    }
                    665: 	} elsif ($target eq 'tex') {
1.319     foxr      666: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                    667: 
1.99      sakharuk  668: 	}
1.159     albertel  669:     } elsif ($target eq 'edit') {
                    670: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    671: 	    &problem_edit_header();
1.226     albertel  672: 	$Apache::lonxml::warnings_error_header=
                    673: 	    &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 />";
1.159     albertel  674: 	my $temp=&Apache::edit::insertlist($target,$token);
                    675: 	$result.=$temp;
                    676:     } elsif ($target eq 'modified') {
                    677: 	$result=$token->[4];
                    678: 	$result.=&Apache::edit::handle_insert();
                    679:     } else {
                    680: 	# page_start returned a starting result, delete it if we don't need it
                    681: 	$result = '';
1.99      sakharuk  682:     }
1.159     albertel  683:     return $result;
1.9       albertel  684: }
                    685: 
                    686: sub end_problem {
1.159     albertel  687:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321   ! albertel  688:     my $result;
1.310     foxr      689: 
1.321   ! albertel  690:     if (!$Apache::lonxml::metamode) {
        !           691: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
        !           692:     }
1.319     foxr      693: 
                    694:     if ($target eq 'tex') {
1.321   ! albertel  695: 
        !           696: 	# Figure out the front matter and replace the
        !           697: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
        !           698: 	# this in end_problem because whether or not we display due
        !           699: 	# dates depends on whether due dates have already been
        !           700: 	# displayed in the problem parts.
        !           701: 
1.319     foxr      702: 	my $frontmatter   = '';
                    703: 	my $startminipage = '';
                    704: 	if (not $env{'form.problem_split'}=~/yes/) {
                    705: 	    $startminipage = '\begin{minipage}{\textwidth}';
                    706: 	}
                    707: 	my $id = $Apache::inputtags::part;
                    708: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                    709: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                    710: 	my @packages = split /,/,$packages;
                    711: 	my $allow_print_points = 0;
                    712: 	foreach my $partial_key (@packages) {
                    713: 	    if ($partial_key=~m/^part_0$/) {
                    714: 		$allow_print_points=1;
                    715: 	    }
                    716: 	}
                    717: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    718: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                    719: 	if (lc($env{'course.'.$env{'request.course.id'}.
                    720: 			'.disableexampointprint'}) eq 'yes') {
                    721: 	    $allow_print_points=0;
                    722: 	}
                    723: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
                    724: 	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 ';
                    725: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                    726: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                    727: 	
                    728: 	#  Figure out what the due date is and if we need to print
                    729: 	#  it in the problem header.  We have been logging the
                    730: 	#  last due date written to file. 
                    731: 	
                    732: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    733: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
                    734: 	my $temp_file;
                    735: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                    736: 	
                    737: 	# Figure out what the last printed due date is or set it
                    738: 	# to the epoch if no duedates have been printed.
                    739: 	
                    740: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                    741: 	if (-e $filename) {
                    742: 	    $temp_file = Apache::File->new($filename);
                    743: 	    my @due_file      = <$temp_file>;
                    744: 	    $due_file_content = $due_file[$#due_file];
                    745: 	    chomp $due_file_content;
                    746: 	} 
                    747: 	
                    748: 	# We display the due date iff it is not the same as the last
                    749: 	# duedate in problem header ($due_file_content), and
                    750: 	# none of our parts displayed a duedate.
                    751: 	#
                    752: 	my $parts_with_displayduedate;
                    753: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                    754: 	    $parts_with_displayduedate = 
                    755: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                    756: 	} else {
                    757: 	    $parts_with_displayduedate = 0;
                    758: 	}
                    759: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                    760: 	    $temp_file = Apache::File->new('>'.$filename);
                    761: 	    print $temp_file "$duetime\n";
                    762: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    763: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                    764: 		    $frontmatter .= $begin_doc.
                    765: 			'\textit{Due date: '.$duedate.'} '.$toc_line;
                    766: 		} else {
                    767: 		    $frontmatter.= $begin_doc.$toc_line;
                    768: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    769: 		}
                    770: 	    } else {
                    771: 		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
                    772: 	    }
                    773: 	} else {
                    774: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    775: 		$frontmatter .= $begin_doc.$toc_line;
                    776: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    777: 	    } else {
                    778: 		$frontmatter .= '\vskip 1mm \\\\\\\\';
                    779: 	    }
                    780: 	}
                    781: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                    782:     }
                    783: 
1.159     albertel  784:     my $status=$Apache::inputtags::status['-1'];
                    785:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    786: 	$target eq 'tex') {
1.249     albertel  787: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel  788: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel  789: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                    790: 		&Apache::inputtags::grade;
                    791: 	    } else {
                    792: 		# move any submission data to .hidden
                    793: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                    794: 	    }
1.159     albertel  795: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    796: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel  797: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel  798: 	    # if part is zero, no <part>s existed, so we need show the current
                    799: 	    # grading status
                    800: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    801: 	    $result.= $gradestatus;
                    802: 	}
                    803: 	if (
1.284     albertel  804: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel  805: 	    ($target eq 'answer') || ($target eq 'tex')
                    806: 	   ) {
1.227     albertel  807: 	    if ($target ne 'tex' &&
1.284     albertel  808: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www       809: 		$result.="</form>";
                    810: 		$result.=&Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields);
1.159     albertel  811: 	    }
                    812: 	    if ($target eq 'web') {
1.281     albertel  813: 		$result.=&Apache::lonxml::xmlend().'</html>';
1.159     albertel  814: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  815: 		my $endminipage = '';
1.284     albertel  816: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk  817: 		    $endminipage = '\end{minipage}';
                    818: 		}
1.284     albertel  819:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk  820: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.257     sakharuk  821: 		    $result=~s/<\/html>//;
1.159     albertel  822: 		} else {
1.262     sakharuk  823: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel  824: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk  825: 			$result .= $endminipage.'\end{document} ';
                    826: 		    } else {
                    827: 			$result .= '';
                    828: 		    }
1.159     albertel  829: 		}
                    830: 	    }
                    831: 	}
                    832: 	if ($target eq 'grade') {
                    833: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    834: 	    &finalize_storage();
                    835: 	}
1.284     albertel  836: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                    837: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.294     albertel  838: 	    $result.=&Apache::lonxml::xmlend().'</html>';
                    839: 	                        # normally we get it from above, but in CSTR
1.172     albertel  840: 	                        # we always show answer mode too.
1.159     albertel  841: 	}
                    842:     } elsif ($target eq 'meta') {
                    843: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  844: 	    @Apache::inputtags::response=();
1.159     albertel  845: 	    $result=&Apache::response::mandatory_part_meta;
                    846: 	}
1.215     albertel  847: 	$result.=&Apache::response::meta_part_order();
1.258     albertel  848: 	$result.=&Apache::response::meta_response_order();
1.159     albertel  849:     } elsif ($target eq 'edit') {
                    850: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel  851: 	$result .= &problem_edit_footer();
1.320     albertel  852:     } elsif ($target eq 'modified') {
                    853: 	 $result .= $token->[2];
                    854: 	 $result.=&Apache::edit::handle_insertafter($token->[1]);
1.159     albertel  855:     }
1.155     albertel  856: 
1.284     albertel  857:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel  858: 	&Apache::inputtags::check_for_duplicate_ids();
                    859:     }
1.204     albertel  860: 
                    861:     &reset_problem_globals('problem');
1.159     albertel  862: 
                    863:     return $result;
1.48      albertel  864: }
                    865: 
1.108     albertel  866: 
1.48      albertel  867: sub start_library {
1.159     albertel  868:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    869:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.244     albertel  870:     if ($$tagstack[0] eq 'library') {
                    871: 	&init_problem_globals('library');
                    872: 	$Apache::lonhomework::type='problem';
                    873:     }
1.159     albertel  874:     if ($target eq 'edit') {
                    875: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    876: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    877: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    878: 	    &problem_edit_header();
                    879: 	my $temp=&Apache::edit::insertlist($target,$token);
                    880: 	$result.=$temp;
                    881:     } elsif ($target eq 'modified') {
                    882: 	$result=$token->[4];
                    883: 	$result.=&Apache::edit::handle_insert();
                    884:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel  885: 	     $env{'request.state'} eq "construct" ) {
1.159     albertel  886: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    887: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    888: 	my $name=&get_resource_name($parstack,$safeeval);
                    889: 	my $rndseed=&setup_rndseed($safeeval);
                    890: 	$result.="$head_tag_start<title>$name</title></head>
1.105     albertel  891:               $body_tag_start \n $form_tag_start".	
1.159     albertel  892: 		  '<input type="hidden" name="submitted" value="yes" />';
                    893: 	$result.=&problem_web_to_edit_header($rndseed);
                    894:     }
                    895:     return $result;
1.48      albertel  896: }
                    897: 
                    898: sub end_library {
1.159     albertel  899:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    900:     my $result='';
                    901:     if ($target eq 'edit') {
                    902: 	$result=&problem_edit_footer();
                    903:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel  904: 	     $env{'request.state'} eq "construct") {
1.280     albertel  905: 	$result.='</form>'.&Apache::loncommon::endbodytag().
                    906: 	    &Apache::lonxml::xmlend();
1.159     albertel  907:     }
1.204     albertel  908:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel  909:     return $result;
1.197     www       910: }
                    911: 
                    912: sub start_definetag {
                    913:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    914: 
                    915:     my $result;
                    916: 
                    917:     my $name = $token->[2]->{'name'};
                    918:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
                    919:     if ($name=~/^\//) {
                    920: 	$result=
                    921:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                    922:     } else {
                    923: 	$result=
                    924:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                    925:     }
                    926:     $skip=~s/\</\&lt\;/gs;
                    927:     $skip=~s/\>/\&gt\;/gs;
                    928:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                    929:     return $result;
                    930: }
                    931: 
                    932: sub end_definetag {
                    933:     return '';
1.1       albertel  934: }
                    935: 
                    936: sub start_block {
1.201     albertel  937:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel  938: 
                    939:     my $result;
1.1       albertel  940: 
1.160     albertel  941:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.131     albertel  942: 	$target eq 'tex' || $target eq 'analyze') {
1.159     albertel  943: 	my $code = $token->[2]->{'condition'};
1.201     albertel  944: 	if (defined($code)) {
1.137     albertel  945: 	    if (!$Apache::lonxml::default_homework_loaded) {
                    946: 		&Apache::lonxml::default_homework_load($safeeval);
                    947: 	    }
1.131     albertel  948: 	    $result = &Apache::run::run($code,$safeeval);
                    949: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                    950: 	} else {
                    951: 	    $result='1';
                    952: 	}
                    953: 	if ( ! $result ) {
1.201     albertel  954: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel  955: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    956: 	}
                    957: 	$result='';
                    958:     } elsif ($target eq 'edit') {
                    959: 	$result .=&Apache::edit::tag_start($target,$token);
                    960: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                    961: 					  $token,40);
                    962: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    963:     } elsif ($target eq 'modified') {
                    964: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    965: 						     $safeeval,'condition');
                    966: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel  967:     }
1.131     albertel  968:     return $result;
1.1       albertel  969: }
                    970: 
                    971: sub end_block {
1.167     www       972:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    973:     my $result;
                    974:     if ($target eq "edit") {
                    975: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    976:     }
                    977:     return $result;
                    978: }
                    979: 
                    980: sub start_languageblock {
1.201     albertel  981:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www       982: 
                    983:     my $result;
                    984: 
                    985:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    986: 	$target eq 'tex' || $target eq 'analyze') {
1.201     albertel  987: 	my $include = $token->[2]->{'include'};
                    988: 	my $exclude = $token->[2]->{'exclude'};
                    989:         my %languages=&Apache::loncommon::display_languages();
                    990:         $result='1';
                    991: 	if ($include) {
                    992:             $result='';
                    993:             foreach (split(/\,/,$include)) {
                    994:                 if ($languages{$_}) { $result='1'; }
                    995:             }
                    996: 	}
                    997:         if ($exclude) {
                    998:             foreach (split(/\,/,$exclude)) {
                    999:                 if ($languages{$_}) { $result='0'; }
                   1000:             }
                   1001: 	}
                   1002: 	if ( ! $result ) {
                   1003: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1004: 						   $style);
                   1005: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1006: 	}
                   1007: 	$result='';
1.167     www      1008:     } elsif ($target eq 'edit') {
                   1009: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1010: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1011: 					  $token,40);
1.211     albertel 1012: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1013: 					  $token,40);
                   1014: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1015:     } elsif ($target eq 'modified') {
                   1016: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1017: 						     $safeeval,'include',
                   1018: 						     'exclude');
1.167     www      1019: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1020:     }
                   1021:     return $result;
                   1022: }
                   1023: 
                   1024: sub end_languageblock {
1.170     www      1025:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1026:     my $result;
1.201     albertel 1027:     if ($target eq "edit") {
1.170     www      1028: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1029:     }
                   1030:     return $result;
                   1031: }
                   1032: 
                   1033: sub start_instructorcomment {
1.201     albertel 1034:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1035: 
                   1036:     my $result;
                   1037: 
                   1038:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1039: 	$target eq 'tex' || $target eq 'analyze') {
1.284     albertel 1040:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1041: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1042: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1043: 						   $parser,$style);
1.170     www      1044: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1045: 	}
                   1046: 	$result='';
                   1047:     } elsif ($target eq 'edit') {
                   1048: 	$result .=&Apache::edit::tag_start($target,$token);
                   1049: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1050:     }
                   1051:     return $result;
                   1052: }
                   1053: 
                   1054: sub end_instructorcomment {
1.159     albertel 1055:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1056:     my $result;
                   1057:     if ($target eq "edit") {
                   1058: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1059:     }
                   1060:     return $result;
1.4       tsai     1061: }
                   1062: 
                   1063: sub start_while {
1.159     albertel 1064:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1065: 
1.160     albertel 1066:     my $result;
1.161     albertel 1067:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.160     albertel 1068: 	$target eq 'tex' || $target eq 'analyze') {
                   1069: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1070: 
1.160     albertel 1071: 	push( @Apache::structuretags::whileconds, $code);
                   1072: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1073: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1074: 	}
                   1075: 	my $result = &Apache::run::run($code,$safeeval);
1.161     albertel 1076: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
1.160     albertel 1077: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1078: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1079: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1080: 	if ( $result ) {
                   1081: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1082: 	}
                   1083:     } elsif ($target eq 'edit') {
                   1084: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1085: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1086: 					  $token,40);
                   1087: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1088:     } elsif ($target eq 'modified') {
                   1089: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1090: 						     $safeeval,'condition');
                   1091: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1092:     }
1.160     albertel 1093:     return $result;
1.4       tsai     1094: }
                   1095: 
                   1096: sub end_while {
1.159     albertel 1097:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1098:     my $result;
                   1099: 
                   1100:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1101: 	$target eq 'tex' || $target eq 'analyze') {
                   1102: 	my $code = pop(@Apache::structuretags::whileconds);
                   1103: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1104: 	my $line = pop(@Apache::structuretags::whileline);
                   1105: 	my $return = &Apache::run::run($code,$safeeval);
                   1106: 	my $starttime=time;
                   1107: 	my $error=0;
                   1108: 	while ($return) {
                   1109: 	    if (time-$starttime >
                   1110: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.270     albertel 1111: 		#$return = 0; $error=1; next;
1.161     albertel 1112: 	    }
                   1113: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                   1114: 	    $return = &Apache::run::run($code,$safeeval);
                   1115: 	}
                   1116: 	if ($error) {
1.270     albertel 1117: 	    &Apache::lonxml::error('<pre>'.&mt('Code ran too long. It ran for more than').' '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' '.&mt('seconds occured while running &lt;while&gt; on line').' '.$line.'</pre>');
1.160     albertel 1118: 	}
                   1119:     } elsif ($target eq "edit") {
                   1120: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1121:     }
1.160     albertel 1122:     return $result;
1.1       albertel 1123: }
1.6       tsai     1124: 
1.160     albertel 1125: # <randomlist show="1">
1.6       tsai     1126: #  <tag1>..</tag1>
                   1127: #  <tag2>..</tag2>
                   1128: #  <tag3>..</tag3>
1.160     albertel 1129: #  ...
1.6       tsai     1130: # </randomlist>
                   1131: sub start_randomlist {
1.159     albertel 1132:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1133:     my $result;
                   1134:     if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
                   1135: 	$target eq 'tex' || $target eq 'analyze') {
                   1136: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1137: 	my $b_parser= HTML::LCParser->new(\$body);
                   1138: 	$b_parser->xml_mode(1);
                   1139: 	$b_parser->marked_sections(1);
1.159     albertel 1140: 	my $b_tok;
                   1141: 	my @randomlist;
                   1142: 	my $list_item;
                   1143: 	while($b_tok = $b_parser->get_token() ) {
                   1144: 	    if($b_tok->[0] eq 'S') { # start tag
                   1145: 		# get content of the tag until matching end tag
                   1146: 		# get all text upto the matching tag
                   1147: 		# and push the content into @randomlist
                   1148: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1149: 							   $b_parser);
                   1150: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1151: 		push(@randomlist,$list_item);
                   1152: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1153:                 #         $list_item</b>";
                   1154: 	    }
                   1155: 	    if($b_tok->[0] eq 'T') { # text
                   1156: 		# what to do with text in between tags?
                   1157: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1158: 	    }
                   1159: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1160: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1161: 	    # }
                   1162: 	}
1.303     albertel 1163: 	if (@randomlist) {
                   1164: 	    my @idx_arr = (0 .. $#randomlist);
                   1165: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1166: 	    my $bodytext = '';
                   1167: 	    my $show=$#randomlist;
                   1168: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1169: 	    $showarg--;
                   1170: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                   1171: 	    for(0 .. $show) {
                   1172: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1173: 	    }
                   1174: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1175: 	}
                   1176:     } elsif ($target eq 'edit' ) {
                   1177: 	$result .=&Apache::edit::tag_start($target,$token);
                   1178: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1179: 					   $token,5);
                   1180: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1181:     } elsif ($target eq 'modified' ) {
                   1182: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1183: 						     $safeeval,'show');
                   1184: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1185:     }
                   1186:     return $result;
1.7       tsai     1187: }
                   1188: 
                   1189: sub shuffle {
                   1190:     my $a=shift;
                   1191:     my $i;
1.303     albertel 1192:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1193: 	&Apache::response::pushrandomnumber();
1.159     albertel 1194: 	for($i=@$a;--$i;) {
                   1195: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1196: 	    next if $i == $j;
                   1197: 	    @$a[$i,$j] = @$a[$j,$i];
                   1198: 	}
1.251     albertel 1199: 	&Apache::response::poprandomnumber();
1.7       tsai     1200:     }
1.6       tsai     1201: }
                   1202: 
                   1203: sub end_randomlist {
1.159     albertel 1204:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1205:     my $result;
                   1206:     if ($target eq 'edit' ) {
                   1207: 	$result=&Apache::edit::tag_end($target,$token,
                   1208: 				       'End Randomly Parsed Block');
                   1209:     }
                   1210:     return $result;
1.6       tsai     1211: }
                   1212: 
1.283     albertel 1213: sub ordered_show_check {
                   1214:     my $last_part=$Apache::inputtags::partlist[-2];
                   1215:     my $in_order=
                   1216: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1217:     my $in_order_show=1;
                   1218:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1219: 	$in_order_show=&Apache::response::check_status($last_part);
                   1220:     }
                   1221:     return $in_order_show;
                   1222: }
                   1223: 
1.11      albertel 1224: sub start_part {
1.159     albertel 1225:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321   ! albertel 1226:     if (!$Apache::lonxml::metamode) {
        !          1227: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
        !          1228: 	                                     # duedates.
        !          1229:     }
1.159     albertel 1230:     my $result='';
                   1231:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1.296     albertel 1232:     if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1.159     albertel 1233:     $Apache::inputtags::part=$id;
1.177     albertel 1234:     push(@Apache::inputtags::partlist,$id);
                   1235:     @Apache::inputtags::response=();
1.159     albertel 1236:     @Apache::inputtags::previous=();
                   1237:     @Apache::inputtags::previous_version=();
1.241     albertel 1238:     $Apache::lonhomework::problemstatus=&get_problem_status($id);
1.159     albertel 1239:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1240:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1241:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1242:     my $in_order_show=&ordered_show_check();
1.214     albertel 1243:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1244:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1245:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1246: 
                   1247:     if ($target eq 'meta') {
1.224     www      1248: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1249: 	return &Apache::response::mandatory_part_meta.
                   1250: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1251:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1252: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1253: 	if ($hidden || !$in_order_show) {
1.159     albertel 1254: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1255: 	} else {
                   1256: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1257: 	    push (@Apache::inputtags::status,$status);
                   1258: 	    my $expression='$external::datestatus="'.$status.'";';
                   1259: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1260: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1261: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1262: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1263: 	    }
1.216     albertel 1264: 	    if (( $status eq 'CLOSED' ) ||
                   1265: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1266: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1267: 		( $status eq 'BANNED') ||
                   1268: 		( $status eq 'UNAVAILABLE') ||
                   1269: 		( $status eq 'INVALID_ACCESS')) {
1.159     albertel 1270: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1271: 		if ( $target eq "web" ) {
1.211     albertel 1272: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1273: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1274: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1275: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1276: 		    } else {
1.211     albertel 1277: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1278: 		    }
1.159     albertel 1279: 		}
                   1280: 	    } else {
                   1281: 		if ($target eq 'tex') {
1.284     albertel 1282: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1283: 			if ($$tagstack[-2] eq 'td') {
                   1284: 			    $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1285: 			} else {
                   1286: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1287: 			}
1.195     sakharuk 1288: 		    }
1.159     albertel 1289: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1290: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1291: 		    my @allkeys = split /,/,$allkeys;
                   1292: 		    my $allow_print_points = 0;
                   1293: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1294: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1295: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1296: 			}
                   1297: 		    }
1.275     albertel 1298: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1299: 		    if (defined($maxtries) && $maxtries < 0) {
                   1300: 			$allow_print_points=0;
                   1301: 		    }
1.302     albertel 1302: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1303: 				    '.disableexampointprint'}) eq 'yes') {
                   1304: 			$allow_print_points=0;
                   1305: 		    }
1.222     sakharuk 1306: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1307: 		} elsif ($target eq 'web') {
                   1308: 		    $result.='<a name="'.&Apache::lonnet::escape($Apache::inputtags::part).'" />';
1.159     albertel 1309: 		}
                   1310: 	    }
                   1311: 	}
                   1312:     } elsif ($target eq 'edit') {
                   1313: 	$result.=&Apache::edit::tag_start($target,$token);
                   1314: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1315: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1316: 	    '&nbsp;&nbsp;'.
                   1317: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1318: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1319:     } elsif ($target eq 'modified') {
                   1320: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1321: 						     $safeeval,'id','display');
1.159     albertel 1322: 	if ($constructtag) {
1.225     albertel 1323: 	    #limiting ids to only letters numbers, and space
1.224     www      1324: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1325: 	    $result = &Apache::edit::rebuild_tag($token);
                   1326: 	    $result.=&Apache::edit::handle_insert();
                   1327: 	}
                   1328:     }
                   1329:     return $result;
1.11      albertel 1330: }
                   1331: 
                   1332: sub end_part {
1.159     albertel 1333:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1334:     &Apache::lonxml::debug("in end_part $target ");
                   1335:     my $status=$Apache::inputtags::status['-1'];
                   1336:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1337:     my $in_order_show=&ordered_show_check();
1.321   ! albertel 1338:     my $result;
        !          1339:     if (!$Apache::lonxml::metamode) {
        !          1340: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
        !          1341:     }
1.312     albertel 1342:     if ($target eq 'grade') {
1.249     albertel 1343: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1344: 	    !$hidden && $in_order_show) {
1.311     foxr     1345: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1346: 	} else {
                   1347: 	    # move any submission data to .hidden
                   1348: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1349: 	}
1.283     albertel 1350:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1351: 	     !$hidden && $in_order_show) {
1.159     albertel 1352: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1353: 							$target);
1.212     albertel 1354: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1355: 	    $gradestatus='';
                   1356: 	}
1.311     foxr     1357: 	$result.=$gradestatus;
1.265     sakharuk 1358: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1359:     } elsif ($target eq 'edit') {
1.311     foxr     1360: 	$result.=&Apache::edit::end_table();
1.159     albertel 1361:     }
                   1362:     pop @Apache::inputtags::status;
                   1363:     $Apache::inputtags::part='';
1.295     albertel 1364:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1365:     return $result;
1.11      albertel 1366: }
1.1       albertel 1367: 
1.25      albertel 1368: sub start_preduedate {
1.159     albertel 1369:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1370:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
1.236     albertel 1371: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1372: 	if (!$Apache::lonhomework::scantronmode &&
                   1373: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1374: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1375: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.159     albertel 1376: 	    &Apache::lonxml::get_all_text("/preduedate",$parser);
                   1377: 	}
1.24      albertel 1378:     }
1.159     albertel 1379:     return '';
1.24      albertel 1380: }
                   1381: 
1.25      albertel 1382: sub end_preduedate {
1.159     albertel 1383:     return '';
1.24      albertel 1384: }
                   1385: 
1.25      albertel 1386: sub start_postanswerdate {
1.159     albertel 1387:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.234     albertel 1388:     if ($target eq 'web' || $target eq 'grade') {
1.300     albertel 1389: 	if ($Apache::lonhomework::scantronmode ||
                   1390: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1.159     albertel 1391: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser);
                   1392: 	}
                   1393:     } elsif ($target eq 'tex') {
1.234     albertel 1394: 	&Apache::lonxml::get_all_text("/postanswerdate",$parser);
1.159     albertel 1395:     }
                   1396:     return '';
1.24      albertel 1397: }
                   1398: 
1.25      albertel 1399: sub end_postanswerdate {
1.159     albertel 1400:     return '';
1.24      albertel 1401: }
                   1402: 
1.25      albertel 1403: sub start_notsolved {
1.159     albertel 1404:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1405:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1406: 	$target eq 'tex') {
                   1407: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1408: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1409: 	if ($gradestatus =~ /^correct/ &&
                   1410: 	    &Apache::response::show_answer()) {
1.159     albertel 1411: 	    &Apache::lonxml::debug("skipping");
                   1412: 	    &Apache::lonxml::get_all_text("/notsolved",$parser);
                   1413: 	}
1.24      albertel 1414:     }
1.159     albertel 1415:     return '';
1.24      albertel 1416: }
                   1417: 
1.25      albertel 1418: sub end_notsolved {
1.159     albertel 1419:     return '';
1.24      albertel 1420: }
                   1421: 
                   1422: sub start_solved {
1.159     albertel 1423:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1424:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1425: 	$target eq 'tex') {
                   1426: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1427: 	if ($gradestatus !~ /^correct/ ||
                   1428: 	    !&Apache::response::show_answer()) {
1.159     albertel 1429: 	    &Apache::lonxml::get_all_text("/solved",$parser);
                   1430: 	}
1.24      albertel 1431:     }
1.159     albertel 1432:     return '';
1.24      albertel 1433: }
                   1434: 
                   1435: sub end_solved {
1.248     albertel 1436:     return '';
                   1437: }
                   1438: 
                   1439: sub start_problemtype {
                   1440:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1441:     my $result;
                   1442:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1443: 	$target eq 'tex' || $target eq 'analyze') {
                   1444: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1445: 	if (!defined($mode)) { $mode='show'; }
                   1446: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1447: 	my $found=0;
                   1448: 	foreach my $type (split(',',$for)) {
                   1449: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1450: 	}
                   1451: 	if ($mode eq 'show' && !$found) {
                   1452: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1453: 	}
                   1454: 	if ($mode eq 'hide' && $found) {
                   1455: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1456: 	}
                   1457:     } elsif ($target eq 'edit') {
                   1458: 	$result .=&Apache::edit::tag_start($target,$token);
                   1459: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1460: 					   [['show','Show'],
                   1461: 					    ['hide','Hide']]
                   1462: 					   ,$token);
                   1463: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1464: 					     [ ['exam','Exam/Quiz Problem'],
                   1465: 					       ['survey','Survey'],
                   1466: 					       ['problem','Homework Problem'] ]
                   1467: 					     ,$token);
                   1468: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1469:     } elsif ($target eq 'modified') {
                   1470: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1471: 						     $safeeval,'mode','for');
                   1472: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1473:     }
                   1474:     return $result;
                   1475: }
                   1476: 
                   1477: sub end_problemtype {
1.159     albertel 1478:     return '';
1.24      albertel 1479: }
1.34      albertel 1480: 
                   1481: sub start_startouttext {
1.159     albertel 1482:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1483:     my @result=(''.'');
                   1484:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1485:     return (@result);
1.34      albertel 1486: }
1.159     albertel 1487: 
1.34      albertel 1488: sub end_startouttext {
1.159     albertel 1489:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1490:     my $result='';
                   1491:     my $text='';
                   1492: 
                   1493:     if ($target eq 'edit') {
                   1494: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser);
1.211     albertel 1495: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1496: <td>".&mt('Delete:').
1.159     albertel 1497:                  &Apache::edit::deletelist($target,$token)
                   1498: 		 ."</td>
1.42      albertel 1499: <td>".
1.159     albertel 1500:                  &Apache::edit::insertlist($target,$token).
                   1501: 		 &Apache::edit::end_row().
                   1502:                  &Apache::edit::start_spanning_row()."\n"
1.188     bowersj2 1503: 		 . &Apache::loncommon::helpLatexCheatsheet () .
1.255     www      1504: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1505:     }
                   1506:     if ($target eq 'modified') {
1.219     albertel 1507: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1508:     }
                   1509:     if ($target eq 'tex') {
                   1510: 	$result .= '\noindent ';
                   1511:     }
                   1512:     return $result;
1.34      albertel 1513: }
1.159     albertel 1514: 
1.34      albertel 1515: sub start_endouttext {
1.159     albertel 1516:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1517:     my $result='';
                   1518:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1519:     if ($target eq "modified") {
                   1520: 	$result='<endouttext />'.
                   1521: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1522:     return $result;
1.34      albertel 1523: }
1.159     albertel 1524: 
1.34      albertel 1525: sub end_endouttext {
1.159     albertel 1526:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1527:     my @result=('','');
                   1528:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1529:     return (@result);
1.34      albertel 1530: }
1.159     albertel 1531: 
1.45      albertel 1532: sub delete_startouttext {
1.159     albertel 1533:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1534:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
                   1535:     my $text=$$parser['-1']->get_text("/endouttext");
                   1536:     my $ntoken=$$parser['-1']->get_token();
                   1537:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1538:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1539:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1540:     # they did the last time round
                   1541:     &Apache::lonxml::increasedepth($ntoken);
                   1542:     &Apache::lonxml::decreasedepth($ntoken);
                   1543:     return 1;
1.193     www      1544: }
                   1545: 
                   1546: sub start_simpleeditbutton {
                   1547:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1548:     my $result='';
1.284     albertel 1549:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 1550: 	($target eq 'web') &&
1.284     albertel 1551:         (&Apache::lonnet::allowed('srm',$env{'request.course.id'}))) {
                   1552:         my $url=$env{'request.noversionuri'};
1.193     www      1553:         $url=~s/\?.*$//;
1.278     albertel 1554: 	my ($symb) = &Apache::lonxml::whichuser();
1.194     www      1555: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.278     albertel 1556:                 '<a href="'.$url.'/smpedit?symb='.&Apache::lonnet::escape($symb).'">'.&mt('Edit').'</a> - '.&mt('Note: it can take up to 10 minutes for changes to take effect for all users.').
1.196     www      1557: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1558:     }
                   1559:     return $result;
                   1560: }
                   1561: 
                   1562: sub end_simpleeditbutton {
                   1563:     return '';
1.45      albertel 1564: }
1.34      albertel 1565: 
1.1       albertel 1566: 1;
                   1567: __END__

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