Annotation of loncom/homework/structuretags.pm, revision 1.323

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.323   ! albertel    4: # $Id: structuretags.pm,v 1.322 2005/11/16 20:37:37 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 $result;
1.289     albertel  348:     if (%Apache::lonhomework::results) {
1.323   ! albertel  349: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
        !           350: 	delete(@Apache::lonhomework::results{@remove});
1.159     albertel  351: 	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.284     albertel  352: 	if ($env{'request.state'} eq 'construct' || $symb eq '') {
                    353: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  354: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.284     albertel  355: 					$env{'request.uri'},'',$domain,$name);
1.159     albertel  356: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    357: 	} else {
                    358: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    359: 					    $symb,$courseid,$domain,$name);
                    360: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   361:             if ($env{'request.role'} =~/^st/) {
                    362:                 &store_aggregates($symb,$courseid);
                    363:             }
1.159     albertel  364: 	}
1.323   ! albertel  365:     } else {
        !           366: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  367:     }
1.159     albertel  368:     return $result;
1.65      albertel  369: }
1.289     albertel  370: use Data::Dumper;
1.65      albertel  371: 
1.285     raeburn   372: # -------------------------------------------------------------store_aggregates
                    373: # Sends hash of values to be incremented in nohist_resourcetracker.db
                    374: # for the course. Increments total number of attempts, unique students 
                    375: # and corrects for each part for an instance of a problem, as appropriate.
                    376: sub store_aggregates {
                    377:     my ($symb,$courseid) = @_;
1.286     albertel  378:     my %aggregate;
                    379:     my @parts;
1.288     albertel  380:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    381:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  382:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  383:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  384:             push(@parts, $1);
1.285     raeburn   385:         }
                    386:     }
1.286     albertel  387:     foreach my $part (@parts) {
                    388:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    389: 	    eq 'APPROX_ANS' ||
                    390: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    391: 	    eq 'EXACT_ANS') {
1.287     albertel  392:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   393:         }
1.286     albertel  394:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  395:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   396:         } else {
1.293     albertel  397:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   398:             if ($last_reset) {
1.293     albertel  399:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   400:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    401:                 }
                    402:             }
1.285     raeburn   403:         }
1.287     albertel  404:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   405:     }
1.292     raeburn   406:     if (keys (%aggregate) > 0) {
1.289     albertel  407: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   408:                             $cdomain,$cname);
                    409:     }
                    410: }
1.289     albertel  411: 
1.65      albertel  412: sub checkout_msg {
1.211     albertel  413:     my %lt=&Apache::lonlocal::texthash( 
                    414: 		'resource'=>'The resource needs to be checked out',
                    415: 		'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.',
                    416:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    417:                 'checkout'=>'Check out Exam for Viewing',
                    418: 		'checkout?'=>'Check out Exam?');
1.159     albertel  419:     return (<<ENDCHECKOUT);
1.211     albertel  420: <h2>$lt{'resource'}</h2>
                    421:     <p>$lt{'id_expln'}</p>
                    422: <font color="red">
                    423: <p>$lt{'warning'}</p>
1.91      albertel  424: </font>
1.284     albertel  425: <form name="checkout" method="POST" action="$env{'request.uri'}">
1.91      albertel  426: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  427: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  428: </form>
                    429: ENDCHECKOUT
                    430: }
                    431: 
1.252     albertel  432: sub firstaccess_msg {
1.253     albertel  433:     my ($time,$symb)=@_;
                    434:     my ($map)=&Apache::lonnet::decode_symb($symb);
                    435:     my $foldertitle=&Apache::lonnet::gettitle($map);
                    436:     &Apache::lonxml::debug("map is $map title is $foldertitle");
1.252     albertel  437:     return (<<ENDCHECKOUT);
1.253     albertel  438: <h2>The resources in "$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  439: <form name="markaccess" method="POST" action="$env{'request.uri'}">
1.252     albertel  440: <input type="hidden" name="markaccess" value="yes" />
                    441: <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
                    442: </form>
                    443: ENDCHECKOUT
                    444: }
                    445: 
1.204     albertel  446: sub init_problem_globals {
                    447:     my ($type)=@_;
                    448:     #initialize globals
1.308     foxr      449:     #   For problems, we start out in part 0 (outside a <part> tag).
                    450:     #   and part 0 is used to describe the main body of the <problem>
                    451:     #
1.204     albertel  452:     if ($type eq 'problem') {
                    453: 	$Apache::inputtags::part='0';
                    454: 	@Apache::inputtags::partlist=('0');
1.266     albertel  455: 	$Apache::lonhomework::problemstatus=&get_problem_status('0');
                    456: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      457: 
1.266     albertel  458:     } elsif ($type eq 'library') {
1.204     albertel  459: 	$Apache::inputtags::part='';
                    460: 	@Apache::inputtags::partlist=();
                    461: 	$Apache::lonhomework::problemstatus='';	
1.266     albertel  462: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      463: 
1.304     albertel  464:     } elsif ($type eq 'Task') {
                    465: 	$Apache::inputtags::part='0';
                    466: 	@Apache::inputtags::partlist=('0');
                    467: 	$Apache::lonhomework::problemstatus='';	
                    468: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  469:     }
                    470:     @Apache::inputtags::responselist = ();
                    471:     @Apache::inputtags::importlist = ();
                    472:     @Apache::inputtags::previous=();
                    473:     @Apache::inputtags::previous_version=();
                    474:     $Apache::structuretags::printanswer='No';
                    475:     @Apache::structuretags::whileconds=();
                    476:     @Apache::structuretags::whilebody=();
                    477:     @Apache::structuretags::whileline=();
                    478:     $Apache::lonhomework::scantronmode=0;
                    479:     undef($Apache::lonhomework::name);
                    480: 
                    481: }
                    482: 
                    483: sub reset_problem_globals {
                    484:     my ($type)=@_;
                    485:     undef(%Apache::lonhomework::history);
                    486:     undef(%Apache::lonhomework::results);
                    487:     undef($Apache::inputtags::part);
1.208     albertel  488: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    489: #detect if we try to do 2 problems in one file
                    490: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  491:     undef($Apache::lonhomework::name);
                    492: }
                    493: 
1.241     albertel  494: sub set_problem_state {
1.240     albertel  495:     my ($part)=@_;
1.284     albertel  496:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  497: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    498: 	    'correct_by_student';
                    499:     }
                    500: }
                    501: 
1.241     albertel  502: sub get_problem_status {
                    503:     my ($part)=@_;
1.267     albertel  504:     my $problem_status;
1.284     albertel  505:     if ($env{'request.state'} eq 'construct' &&
                    506: 	defined($env{'form.problemstatus'})) {
                    507: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  508:     } else {
                    509: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    510: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  511: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  512:     }
                    513:     return $problem_status;
                    514: }
                    515: 
1.9       albertel  516: sub start_problem {
1.159     albertel  517:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19      albertel  518: 
1.311     foxr      519:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  520:     if (!$Apache::lonxml::metamode) {
                    521: 	&Apache::lonxml::startredirection();
                    522:     }
1.311     foxr      523: 
1.308     foxr      524:     # Problems don't nest and we don't allow more than one <problem> in
                    525:     # a .problem file.
                    526:     #
1.184     albertel  527:     if ( $Apache::inputtags::part ne '' ||
                    528: 	 $Apache::lonhomework::parsing_a_problem) {
                    529: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
                    530: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
1.159     albertel  531: 	return '';
                    532:     }
1.184     albertel  533: 
                    534:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  535:     &init_problem_globals('problem');
1.166     albertel  536: 
1.284     albertel  537:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  538: 	$Apache::lonhomework::scantronmode=1;
                    539:     }
1.161     albertel  540: 
1.246     albertel  541:     &initialize_storage();
1.159     albertel  542:     if ($target ne 'analyze') {
                    543: 	if ($target eq 'web') {
                    544: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
1.238     albertel  545: 	}
1.284     albertel  546:        	if ($env{'request.state'} eq 'construct') { &set_problem_state('0'); }
1.159     albertel  547: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.284     albertel  548: 	if (($env{'request.state'} eq 'construct') &&
                    549: 	    defined($env{'form.problemtype'})) {
                    550: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  551: 	}
1.240     albertel  552: 	&Apache::lonxml::debug("Found this to be of type :$Apache::ltonhomework::type:");
1.159     albertel  553:     }
1.164     albertel  554:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  555: 	my $uri=$env{'request.uri'};
1.159     albertel  556: 	if ($uri=~/\.(\w+)$/) {
                    557: 	    $Apache::lonhomework::type=$1;
                    558: 	    &Apache::lonxml::debug("Using type of $1");
                    559: 	} else {
                    560: 	    $Apache::lonhomework::type='problem';
                    561: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    562: 	}
1.87      albertel  563:     }
1.301     albertel  564:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       565: 
1.159     albertel  566:     #added vars to the scripting enviroment
1.213     albertel  567:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  568:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  569:     &Apache::run::run($expression,$safeeval);
1.159     albertel  570:     my $status;
                    571:     my $accessmsg;
                    572: 
                    573:     #should get back a <html> or the neccesary stuff to start XML/MathML
                    574:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    575: 	&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
1.284     albertel  576:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  577: 
                    578:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    579:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    580: 	$target eq 'tex') {
                    581: 	#handle exam checkout
                    582: 	if ($Apache::lonhomework::type eq 'exam') {
                    583: 	    my $token=
                    584: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  585: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  586: 		$token=&Apache::lonxml::maketoken();
                    587: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    588: 		    $token;
                    589: 	    }
                    590: 	    $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  591: 	}
1.284     albertel  592: 	if ($env{'form.markaccess'}) {
1.252     albertel  593: 	    &Apache::lonnet::set_first_access('map');
                    594: 	}
1.159     albertel  595: 	#handle rand seed in construction space
                    596: 	my $rndseed=&setup_rndseed($safeeval);
1.162     albertel  597: 	my ($symb)=&Apache::lonxml::whichuser();
1.284     albertel  598: 	if ($env{'request.state'} ne "construct" && $symb eq '') {
1.162     albertel  599: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    600: 		$rndseed.'" />'.
                    601: 		    '<input type="submit" name="resetdata"
1.211     albertel  602:                              value="'.&mt('New Problem Variation').'" />'.
1.164     albertel  603: 		    '<input type="hidden" name="username"
1.284     albertel  604:                              value="'.$env{'form.username'}.'" />';
                    605: 	    if ($env{'user.adv'}) {
1.267     albertel  606: 		$form_tag_start.=
1.300     albertel  607: 		    ' <label><input type="checkbox" name="showallfoils" ';
1.284     albertel  608: 		if (defined($env{'form.showallfoils'})) {
1.267     albertel  609: 		    $form_tag_start.='checked="on"';
                    610: 		}
1.300     albertel  611: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    612: 		    '</label>';
1.267     albertel  613: 	    }
                    614: 	    $form_tag_start.='<hr />';
1.162     albertel  615: 	}
1.159     albertel  616: 	($status,$accessmsg) = &Apache::lonhomework::check_access('0');
                    617: 	push (@Apache::inputtags::status,$status);
                    618: 	my $expression='$external::datestatus="'.$status.'";';
                    619: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    620: 	&Apache::run::run($expression,$safeeval);
                    621: 	&Apache::lonxml::debug("Got $status");
                    622: 	if (( $status eq 'CLOSED' ) ||
                    623: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  624: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  625: 	    ( $status eq 'BANNED') ||
1.216     albertel  626: 	    ( $status eq 'UNAVAILABLE') ||
                    627: 	    ( $status eq 'INVALID_ACCESS')) {
1.159     albertel  628: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
                    629: 	    if ( $target eq "web" ) {
                    630: 		$result.= $head_tag_start.'</head>';
                    631: 		my $msg=$body_tag_start;
                    632: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  633: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  634: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  635: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  636: 		}
1.216     albertel  637: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.159     albertel  638: 		    $msg.='The problem '.$accessmsg;
                    639: 		} elsif ($status eq 'UNCHECKEDOUT') {
                    640: 		    $msg.=&checkout_msg;
1.252     albertel  641: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  642: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.159     albertel  643: 		}
                    644: 		$result.=$msg.'<br />';
                    645: 	    } elsif ($target eq 'tex') {
                    646: 		$result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
                    647: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  648: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  649: 		} else {
1.211     albertel  650: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  651: 		}
                    652: 	    }
                    653: 	} elsif ($target eq 'web') {
                    654: 	    my $name= &get_resource_name($parstack,$safeeval);
1.227     albertel  655: 	    $result.="$head_tag_start<title>$name</title></head>
1.158     sakharuk  656:               $body_tag_start \n $form_tag_start".	
1.227     albertel  657: 	      '<input type="hidden" name="submitted" value="yes" />';
                    658: 	    # create a page header and exit
1.284     albertel  659: 	    if ($env{'request.state'} eq "construct") {
                    660: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.227     albertel  661: 	    }
                    662: 	    # if we are viewing someone else preserve that info
1.284     albertel  663: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel  664: 		foreach my $field ('symb','courseid','domain','username') {
                    665: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel  666: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel  667: 		}
                    668: 	    }
                    669: 	} elsif ($target eq 'tex') {
1.319     foxr      670: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                    671: 
1.99      sakharuk  672: 	}
1.159     albertel  673:     } elsif ($target eq 'edit') {
                    674: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    675: 	    &problem_edit_header();
1.226     albertel  676: 	$Apache::lonxml::warnings_error_header=
                    677: 	    &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  678: 	my $temp=&Apache::edit::insertlist($target,$token);
                    679: 	$result.=$temp;
                    680:     } elsif ($target eq 'modified') {
                    681: 	$result=$token->[4];
                    682: 	$result.=&Apache::edit::handle_insert();
                    683:     } else {
                    684: 	# page_start returned a starting result, delete it if we don't need it
                    685: 	$result = '';
1.99      sakharuk  686:     }
1.159     albertel  687:     return $result;
1.9       albertel  688: }
                    689: 
                    690: sub end_problem {
1.159     albertel  691:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel  692:     my $result;
1.310     foxr      693: 
1.321     albertel  694:     if (!$Apache::lonxml::metamode) {
                    695: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
                    696:     }
1.319     foxr      697: 
                    698:     if ($target eq 'tex') {
1.321     albertel  699: 
                    700: 	# Figure out the front matter and replace the
                    701: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                    702: 	# this in end_problem because whether or not we display due
                    703: 	# dates depends on whether due dates have already been
                    704: 	# displayed in the problem parts.
                    705: 
1.319     foxr      706: 	my $frontmatter   = '';
                    707: 	my $startminipage = '';
                    708: 	if (not $env{'form.problem_split'}=~/yes/) {
                    709: 	    $startminipage = '\begin{minipage}{\textwidth}';
                    710: 	}
                    711: 	my $id = $Apache::inputtags::part;
                    712: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                    713: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                    714: 	my @packages = split /,/,$packages;
                    715: 	my $allow_print_points = 0;
                    716: 	foreach my $partial_key (@packages) {
                    717: 	    if ($partial_key=~m/^part_0$/) {
                    718: 		$allow_print_points=1;
                    719: 	    }
                    720: 	}
                    721: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    722: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                    723: 	if (lc($env{'course.'.$env{'request.course.id'}.
                    724: 			'.disableexampointprint'}) eq 'yes') {
                    725: 	    $allow_print_points=0;
                    726: 	}
                    727: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
                    728: 	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 ';
                    729: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                    730: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                    731: 	
                    732: 	#  Figure out what the due date is and if we need to print
                    733: 	#  it in the problem header.  We have been logging the
                    734: 	#  last due date written to file. 
                    735: 	
                    736: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    737: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
                    738: 	my $temp_file;
                    739: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                    740: 	
                    741: 	# Figure out what the last printed due date is or set it
                    742: 	# to the epoch if no duedates have been printed.
                    743: 	
                    744: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                    745: 	if (-e $filename) {
                    746: 	    $temp_file = Apache::File->new($filename);
                    747: 	    my @due_file      = <$temp_file>;
                    748: 	    $due_file_content = $due_file[$#due_file];
                    749: 	    chomp $due_file_content;
                    750: 	} 
                    751: 	
                    752: 	# We display the due date iff it is not the same as the last
                    753: 	# duedate in problem header ($due_file_content), and
                    754: 	# none of our parts displayed a duedate.
                    755: 	#
                    756: 	my $parts_with_displayduedate;
                    757: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                    758: 	    $parts_with_displayduedate = 
                    759: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                    760: 	} else {
                    761: 	    $parts_with_displayduedate = 0;
                    762: 	}
                    763: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                    764: 	    $temp_file = Apache::File->new('>'.$filename);
                    765: 	    print $temp_file "$duetime\n";
                    766: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    767: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                    768: 		    $frontmatter .= $begin_doc.
                    769: 			'\textit{Due date: '.$duedate.'} '.$toc_line;
                    770: 		} else {
                    771: 		    $frontmatter.= $begin_doc.$toc_line;
                    772: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    773: 		}
                    774: 	    } else {
                    775: 		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
                    776: 	    }
                    777: 	} else {
                    778: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    779: 		$frontmatter .= $begin_doc.$toc_line;
                    780: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    781: 	    } else {
                    782: 		$frontmatter .= '\vskip 1mm \\\\\\\\';
                    783: 	    }
                    784: 	}
                    785: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                    786:     }
                    787: 
1.159     albertel  788:     my $status=$Apache::inputtags::status['-1'];
                    789:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    790: 	$target eq 'tex') {
1.249     albertel  791: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel  792: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel  793: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                    794: 		&Apache::inputtags::grade;
                    795: 	    } else {
                    796: 		# move any submission data to .hidden
                    797: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                    798: 	    }
1.159     albertel  799: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    800: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel  801: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel  802: 	    # if part is zero, no <part>s existed, so we need show the current
                    803: 	    # grading status
                    804: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    805: 	    $result.= $gradestatus;
                    806: 	}
                    807: 	if (
1.284     albertel  808: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel  809: 	    ($target eq 'answer') || ($target eq 'tex')
                    810: 	   ) {
1.227     albertel  811: 	    if ($target ne 'tex' &&
1.284     albertel  812: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www       813: 		$result.="</form>";
                    814: 		$result.=&Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields);
1.159     albertel  815: 	    }
                    816: 	    if ($target eq 'web') {
1.281     albertel  817: 		$result.=&Apache::lonxml::xmlend().'</html>';
1.159     albertel  818: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  819: 		my $endminipage = '';
1.284     albertel  820: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk  821: 		    $endminipage = '\end{minipage}';
                    822: 		}
1.284     albertel  823:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk  824: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.257     sakharuk  825: 		    $result=~s/<\/html>//;
1.159     albertel  826: 		} else {
1.262     sakharuk  827: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel  828: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk  829: 			$result .= $endminipage.'\end{document} ';
                    830: 		    } else {
                    831: 			$result .= '';
                    832: 		    }
1.159     albertel  833: 		}
                    834: 	    }
                    835: 	}
                    836: 	if ($target eq 'grade') {
                    837: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    838: 	    &finalize_storage();
                    839: 	}
1.284     albertel  840: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                    841: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.294     albertel  842: 	    $result.=&Apache::lonxml::xmlend().'</html>';
                    843: 	                        # normally we get it from above, but in CSTR
1.172     albertel  844: 	                        # we always show answer mode too.
1.159     albertel  845: 	}
                    846:     } elsif ($target eq 'meta') {
                    847: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  848: 	    @Apache::inputtags::response=();
1.159     albertel  849: 	    $result=&Apache::response::mandatory_part_meta;
                    850: 	}
1.215     albertel  851: 	$result.=&Apache::response::meta_part_order();
1.258     albertel  852: 	$result.=&Apache::response::meta_response_order();
1.159     albertel  853:     } elsif ($target eq 'edit') {
                    854: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel  855: 	$result .= &problem_edit_footer();
1.320     albertel  856:     } elsif ($target eq 'modified') {
                    857: 	 $result .= $token->[2];
                    858: 	 $result.=&Apache::edit::handle_insertafter($token->[1]);
1.159     albertel  859:     }
1.155     albertel  860: 
1.284     albertel  861:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel  862: 	&Apache::inputtags::check_for_duplicate_ids();
                    863:     }
1.204     albertel  864: 
                    865:     &reset_problem_globals('problem');
1.159     albertel  866: 
                    867:     return $result;
1.48      albertel  868: }
                    869: 
1.108     albertel  870: 
1.48      albertel  871: sub start_library {
1.159     albertel  872:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    873:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.244     albertel  874:     if ($$tagstack[0] eq 'library') {
                    875: 	&init_problem_globals('library');
                    876: 	$Apache::lonhomework::type='problem';
                    877:     }
1.159     albertel  878:     if ($target eq 'edit') {
                    879: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    880: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    881: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    882: 	    &problem_edit_header();
                    883: 	my $temp=&Apache::edit::insertlist($target,$token);
                    884: 	$result.=$temp;
                    885:     } elsif ($target eq 'modified') {
                    886: 	$result=$token->[4];
                    887: 	$result.=&Apache::edit::handle_insert();
                    888:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel  889: 	     $env{'request.state'} eq "construct" ) {
1.159     albertel  890: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    891: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    892: 	my $name=&get_resource_name($parstack,$safeeval);
                    893: 	my $rndseed=&setup_rndseed($safeeval);
                    894: 	$result.="$head_tag_start<title>$name</title></head>
1.105     albertel  895:               $body_tag_start \n $form_tag_start".	
1.159     albertel  896: 		  '<input type="hidden" name="submitted" value="yes" />';
                    897: 	$result.=&problem_web_to_edit_header($rndseed);
                    898:     }
                    899:     return $result;
1.48      albertel  900: }
                    901: 
                    902: sub end_library {
1.159     albertel  903:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    904:     my $result='';
                    905:     if ($target eq 'edit') {
                    906: 	$result=&problem_edit_footer();
                    907:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel  908: 	     $env{'request.state'} eq "construct") {
1.280     albertel  909: 	$result.='</form>'.&Apache::loncommon::endbodytag().
                    910: 	    &Apache::lonxml::xmlend();
1.159     albertel  911:     }
1.204     albertel  912:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel  913:     return $result;
1.197     www       914: }
                    915: 
                    916: sub start_definetag {
                    917:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    918: 
                    919:     my $result;
                    920: 
                    921:     my $name = $token->[2]->{'name'};
                    922:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
                    923:     if ($name=~/^\//) {
                    924: 	$result=
                    925:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                    926:     } else {
                    927: 	$result=
                    928:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                    929:     }
                    930:     $skip=~s/\</\&lt\;/gs;
                    931:     $skip=~s/\>/\&gt\;/gs;
                    932:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                    933:     return $result;
                    934: }
                    935: 
                    936: sub end_definetag {
                    937:     return '';
1.1       albertel  938: }
                    939: 
                    940: sub start_block {
1.201     albertel  941:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel  942: 
                    943:     my $result;
1.1       albertel  944: 
1.160     albertel  945:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.131     albertel  946: 	$target eq 'tex' || $target eq 'analyze') {
1.159     albertel  947: 	my $code = $token->[2]->{'condition'};
1.201     albertel  948: 	if (defined($code)) {
1.137     albertel  949: 	    if (!$Apache::lonxml::default_homework_loaded) {
                    950: 		&Apache::lonxml::default_homework_load($safeeval);
                    951: 	    }
1.131     albertel  952: 	    $result = &Apache::run::run($code,$safeeval);
                    953: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                    954: 	} else {
                    955: 	    $result='1';
                    956: 	}
                    957: 	if ( ! $result ) {
1.201     albertel  958: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel  959: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    960: 	}
                    961: 	$result='';
                    962:     } elsif ($target eq 'edit') {
                    963: 	$result .=&Apache::edit::tag_start($target,$token);
                    964: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                    965: 					  $token,40);
                    966: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    967:     } elsif ($target eq 'modified') {
                    968: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    969: 						     $safeeval,'condition');
                    970: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel  971:     }
1.131     albertel  972:     return $result;
1.1       albertel  973: }
                    974: 
                    975: sub end_block {
1.167     www       976:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    977:     my $result;
                    978:     if ($target eq "edit") {
                    979: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    980:     }
                    981:     return $result;
                    982: }
                    983: 
                    984: sub start_languageblock {
1.201     albertel  985:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www       986: 
                    987:     my $result;
                    988: 
                    989:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    990: 	$target eq 'tex' || $target eq 'analyze') {
1.201     albertel  991: 	my $include = $token->[2]->{'include'};
                    992: 	my $exclude = $token->[2]->{'exclude'};
                    993:         my %languages=&Apache::loncommon::display_languages();
                    994:         $result='1';
                    995: 	if ($include) {
                    996:             $result='';
                    997:             foreach (split(/\,/,$include)) {
                    998:                 if ($languages{$_}) { $result='1'; }
                    999:             }
                   1000: 	}
                   1001:         if ($exclude) {
                   1002:             foreach (split(/\,/,$exclude)) {
                   1003:                 if ($languages{$_}) { $result='0'; }
                   1004:             }
                   1005: 	}
                   1006: 	if ( ! $result ) {
                   1007: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1008: 						   $style);
                   1009: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1010: 	}
                   1011: 	$result='';
1.167     www      1012:     } elsif ($target eq 'edit') {
                   1013: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1014: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1015: 					  $token,40);
1.211     albertel 1016: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1017: 					  $token,40);
                   1018: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1019:     } elsif ($target eq 'modified') {
                   1020: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1021: 						     $safeeval,'include',
                   1022: 						     'exclude');
1.167     www      1023: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1024:     }
                   1025:     return $result;
                   1026: }
                   1027: 
                   1028: sub end_languageblock {
1.170     www      1029:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1030:     my $result;
1.201     albertel 1031:     if ($target eq "edit") {
1.170     www      1032: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1033:     }
                   1034:     return $result;
                   1035: }
                   1036: 
                   1037: sub start_instructorcomment {
1.201     albertel 1038:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1039: 
                   1040:     my $result;
                   1041: 
                   1042:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1043: 	$target eq 'tex' || $target eq 'analyze') {
1.284     albertel 1044:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1045: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1046: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1047: 						   $parser,$style);
1.170     www      1048: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1049: 	}
                   1050: 	$result='';
                   1051:     } elsif ($target eq 'edit') {
                   1052: 	$result .=&Apache::edit::tag_start($target,$token);
                   1053: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1054:     }
                   1055:     return $result;
                   1056: }
                   1057: 
                   1058: sub end_instructorcomment {
1.159     albertel 1059:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1060:     my $result;
                   1061:     if ($target eq "edit") {
                   1062: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1063:     }
                   1064:     return $result;
1.4       tsai     1065: }
                   1066: 
                   1067: sub start_while {
1.159     albertel 1068:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1069: 
1.160     albertel 1070:     my $result;
1.161     albertel 1071:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.160     albertel 1072: 	$target eq 'tex' || $target eq 'analyze') {
                   1073: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1074: 
1.160     albertel 1075: 	push( @Apache::structuretags::whileconds, $code);
                   1076: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1077: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1078: 	}
                   1079: 	my $result = &Apache::run::run($code,$safeeval);
1.161     albertel 1080: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
1.160     albertel 1081: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1082: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1083: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1084: 	if ( $result ) {
                   1085: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1086: 	}
                   1087:     } elsif ($target eq 'edit') {
                   1088: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1089: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1090: 					  $token,40);
                   1091: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1092:     } elsif ($target eq 'modified') {
                   1093: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1094: 						     $safeeval,'condition');
                   1095: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1096:     }
1.160     albertel 1097:     return $result;
1.4       tsai     1098: }
                   1099: 
                   1100: sub end_while {
1.159     albertel 1101:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1102:     my $result;
                   1103: 
                   1104:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1105: 	$target eq 'tex' || $target eq 'analyze') {
                   1106: 	my $code = pop(@Apache::structuretags::whileconds);
                   1107: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1108: 	my $line = pop(@Apache::structuretags::whileline);
                   1109: 	my $return = &Apache::run::run($code,$safeeval);
                   1110: 	my $starttime=time;
                   1111: 	my $error=0;
                   1112: 	while ($return) {
                   1113: 	    if (time-$starttime >
                   1114: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.270     albertel 1115: 		#$return = 0; $error=1; next;
1.161     albertel 1116: 	    }
                   1117: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                   1118: 	    $return = &Apache::run::run($code,$safeeval);
                   1119: 	}
                   1120: 	if ($error) {
1.270     albertel 1121: 	    &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 1122: 	}
                   1123:     } elsif ($target eq "edit") {
                   1124: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1125:     }
1.160     albertel 1126:     return $result;
1.1       albertel 1127: }
1.6       tsai     1128: 
1.160     albertel 1129: # <randomlist show="1">
1.6       tsai     1130: #  <tag1>..</tag1>
                   1131: #  <tag2>..</tag2>
                   1132: #  <tag3>..</tag3>
1.160     albertel 1133: #  ...
1.6       tsai     1134: # </randomlist>
                   1135: sub start_randomlist {
1.159     albertel 1136:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1137:     my $result;
                   1138:     if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
                   1139: 	$target eq 'tex' || $target eq 'analyze') {
                   1140: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1141: 	my $b_parser= HTML::LCParser->new(\$body);
                   1142: 	$b_parser->xml_mode(1);
                   1143: 	$b_parser->marked_sections(1);
1.159     albertel 1144: 	my $b_tok;
                   1145: 	my @randomlist;
                   1146: 	my $list_item;
                   1147: 	while($b_tok = $b_parser->get_token() ) {
                   1148: 	    if($b_tok->[0] eq 'S') { # start tag
                   1149: 		# get content of the tag until matching end tag
                   1150: 		# get all text upto the matching tag
                   1151: 		# and push the content into @randomlist
                   1152: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1153: 							   $b_parser);
                   1154: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1155: 		push(@randomlist,$list_item);
                   1156: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1157:                 #         $list_item</b>";
                   1158: 	    }
                   1159: 	    if($b_tok->[0] eq 'T') { # text
                   1160: 		# what to do with text in between tags?
                   1161: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1162: 	    }
                   1163: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1164: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1165: 	    # }
                   1166: 	}
1.303     albertel 1167: 	if (@randomlist) {
                   1168: 	    my @idx_arr = (0 .. $#randomlist);
                   1169: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1170: 	    my $bodytext = '';
                   1171: 	    my $show=$#randomlist;
                   1172: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1173: 	    $showarg--;
                   1174: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                   1175: 	    for(0 .. $show) {
                   1176: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1177: 	    }
                   1178: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1179: 	}
                   1180:     } elsif ($target eq 'edit' ) {
                   1181: 	$result .=&Apache::edit::tag_start($target,$token);
                   1182: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1183: 					   $token,5);
                   1184: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1185:     } elsif ($target eq 'modified' ) {
                   1186: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1187: 						     $safeeval,'show');
                   1188: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1189:     }
                   1190:     return $result;
1.7       tsai     1191: }
                   1192: 
                   1193: sub shuffle {
                   1194:     my $a=shift;
                   1195:     my $i;
1.303     albertel 1196:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1197: 	&Apache::response::pushrandomnumber();
1.159     albertel 1198: 	for($i=@$a;--$i;) {
                   1199: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1200: 	    next if $i == $j;
                   1201: 	    @$a[$i,$j] = @$a[$j,$i];
                   1202: 	}
1.251     albertel 1203: 	&Apache::response::poprandomnumber();
1.7       tsai     1204:     }
1.6       tsai     1205: }
                   1206: 
                   1207: sub end_randomlist {
1.159     albertel 1208:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1209:     my $result;
                   1210:     if ($target eq 'edit' ) {
                   1211: 	$result=&Apache::edit::tag_end($target,$token,
                   1212: 				       'End Randomly Parsed Block');
                   1213:     }
                   1214:     return $result;
1.6       tsai     1215: }
                   1216: 
1.283     albertel 1217: sub ordered_show_check {
                   1218:     my $last_part=$Apache::inputtags::partlist[-2];
                   1219:     my $in_order=
                   1220: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1221:     my $in_order_show=1;
                   1222:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1223: 	$in_order_show=&Apache::response::check_status($last_part);
                   1224:     }
                   1225:     return $in_order_show;
                   1226: }
                   1227: 
1.11      albertel 1228: sub start_part {
1.159     albertel 1229:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel 1230:     if (!$Apache::lonxml::metamode) {
                   1231: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1232: 	                                     # duedates.
                   1233:     }
1.159     albertel 1234:     my $result='';
                   1235:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1.296     albertel 1236:     if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1.159     albertel 1237:     $Apache::inputtags::part=$id;
1.177     albertel 1238:     push(@Apache::inputtags::partlist,$id);
                   1239:     @Apache::inputtags::response=();
1.159     albertel 1240:     @Apache::inputtags::previous=();
                   1241:     @Apache::inputtags::previous_version=();
1.241     albertel 1242:     $Apache::lonhomework::problemstatus=&get_problem_status($id);
1.159     albertel 1243:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1244:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1245:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1246:     my $in_order_show=&ordered_show_check();
1.214     albertel 1247:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1248:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1249:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1250: 
                   1251:     if ($target eq 'meta') {
1.224     www      1252: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1253: 	return &Apache::response::mandatory_part_meta.
                   1254: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1255:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1256: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1257: 	if ($hidden || !$in_order_show) {
1.159     albertel 1258: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1259: 	} else {
                   1260: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1261: 	    push (@Apache::inputtags::status,$status);
                   1262: 	    my $expression='$external::datestatus="'.$status.'";';
                   1263: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1264: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1265: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1266: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1267: 	    }
1.216     albertel 1268: 	    if (( $status eq 'CLOSED' ) ||
                   1269: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1270: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1271: 		( $status eq 'BANNED') ||
                   1272: 		( $status eq 'UNAVAILABLE') ||
                   1273: 		( $status eq 'INVALID_ACCESS')) {
1.159     albertel 1274: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1275: 		if ( $target eq "web" ) {
1.211     albertel 1276: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1277: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1278: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1279: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1280: 		    } else {
1.211     albertel 1281: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1282: 		    }
1.159     albertel 1283: 		}
                   1284: 	    } else {
                   1285: 		if ($target eq 'tex') {
1.284     albertel 1286: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1287: 			if ($$tagstack[-2] eq 'td') {
                   1288: 			    $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1289: 			} else {
                   1290: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1291: 			}
1.195     sakharuk 1292: 		    }
1.159     albertel 1293: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1294: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1295: 		    my @allkeys = split /,/,$allkeys;
                   1296: 		    my $allow_print_points = 0;
                   1297: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1298: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1299: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1300: 			}
                   1301: 		    }
1.275     albertel 1302: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1303: 		    if (defined($maxtries) && $maxtries < 0) {
                   1304: 			$allow_print_points=0;
                   1305: 		    }
1.302     albertel 1306: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1307: 				    '.disableexampointprint'}) eq 'yes') {
                   1308: 			$allow_print_points=0;
                   1309: 		    }
1.222     sakharuk 1310: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1311: 		} elsif ($target eq 'web') {
                   1312: 		    $result.='<a name="'.&Apache::lonnet::escape($Apache::inputtags::part).'" />';
1.159     albertel 1313: 		}
                   1314: 	    }
                   1315: 	}
                   1316:     } elsif ($target eq 'edit') {
                   1317: 	$result.=&Apache::edit::tag_start($target,$token);
                   1318: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1319: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1320: 	    '&nbsp;&nbsp;'.
                   1321: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1322: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1323:     } elsif ($target eq 'modified') {
                   1324: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1325: 						     $safeeval,'id','display');
1.159     albertel 1326: 	if ($constructtag) {
1.225     albertel 1327: 	    #limiting ids to only letters numbers, and space
1.224     www      1328: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1329: 	    $result = &Apache::edit::rebuild_tag($token);
                   1330: 	    $result.=&Apache::edit::handle_insert();
                   1331: 	}
                   1332:     }
                   1333:     return $result;
1.11      albertel 1334: }
                   1335: 
                   1336: sub end_part {
1.159     albertel 1337:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1338:     &Apache::lonxml::debug("in end_part $target ");
                   1339:     my $status=$Apache::inputtags::status['-1'];
                   1340:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1341:     my $in_order_show=&ordered_show_check();
1.321     albertel 1342:     my $result;
                   1343:     if (!$Apache::lonxml::metamode) {
                   1344: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
                   1345:     }
1.312     albertel 1346:     if ($target eq 'grade') {
1.249     albertel 1347: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1348: 	    !$hidden && $in_order_show) {
1.311     foxr     1349: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1350: 	} else {
                   1351: 	    # move any submission data to .hidden
                   1352: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1353: 	}
1.283     albertel 1354:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1355: 	     !$hidden && $in_order_show) {
1.159     albertel 1356: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1357: 							$target);
1.212     albertel 1358: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1359: 	    $gradestatus='';
                   1360: 	}
1.311     foxr     1361: 	$result.=$gradestatus;
1.265     sakharuk 1362: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1363:     } elsif ($target eq 'edit') {
1.311     foxr     1364: 	$result.=&Apache::edit::end_table();
1.322     albertel 1365:     } elsif ($target eq 'modified') {
                   1366: 	 $result .= $token->[2];
                   1367: 	 $result.=&Apache::edit::handle_insertafter($token->[1]);
1.159     albertel 1368:     }
                   1369:     pop @Apache::inputtags::status;
                   1370:     $Apache::inputtags::part='';
1.295     albertel 1371:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1372:     return $result;
1.11      albertel 1373: }
1.1       albertel 1374: 
1.25      albertel 1375: sub start_preduedate {
1.159     albertel 1376:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1377:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
1.236     albertel 1378: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1379: 	if (!$Apache::lonhomework::scantronmode &&
                   1380: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1381: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1382: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.159     albertel 1383: 	    &Apache::lonxml::get_all_text("/preduedate",$parser);
                   1384: 	}
1.24      albertel 1385:     }
1.159     albertel 1386:     return '';
1.24      albertel 1387: }
                   1388: 
1.25      albertel 1389: sub end_preduedate {
1.159     albertel 1390:     return '';
1.24      albertel 1391: }
                   1392: 
1.25      albertel 1393: sub start_postanswerdate {
1.159     albertel 1394:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.234     albertel 1395:     if ($target eq 'web' || $target eq 'grade') {
1.300     albertel 1396: 	if ($Apache::lonhomework::scantronmode ||
                   1397: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1.159     albertel 1398: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser);
                   1399: 	}
                   1400:     } elsif ($target eq 'tex') {
1.234     albertel 1401: 	&Apache::lonxml::get_all_text("/postanswerdate",$parser);
1.159     albertel 1402:     }
                   1403:     return '';
1.24      albertel 1404: }
                   1405: 
1.25      albertel 1406: sub end_postanswerdate {
1.159     albertel 1407:     return '';
1.24      albertel 1408: }
                   1409: 
1.25      albertel 1410: sub start_notsolved {
1.159     albertel 1411:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1412:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1413: 	$target eq 'tex') {
                   1414: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1415: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1416: 	if ($gradestatus =~ /^correct/ &&
                   1417: 	    &Apache::response::show_answer()) {
1.159     albertel 1418: 	    &Apache::lonxml::debug("skipping");
                   1419: 	    &Apache::lonxml::get_all_text("/notsolved",$parser);
                   1420: 	}
1.24      albertel 1421:     }
1.159     albertel 1422:     return '';
1.24      albertel 1423: }
                   1424: 
1.25      albertel 1425: sub end_notsolved {
1.159     albertel 1426:     return '';
1.24      albertel 1427: }
                   1428: 
                   1429: sub start_solved {
1.159     albertel 1430:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1431:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1432: 	$target eq 'tex') {
                   1433: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1434: 	if ($gradestatus !~ /^correct/ ||
                   1435: 	    !&Apache::response::show_answer()) {
1.159     albertel 1436: 	    &Apache::lonxml::get_all_text("/solved",$parser);
                   1437: 	}
1.24      albertel 1438:     }
1.159     albertel 1439:     return '';
1.24      albertel 1440: }
                   1441: 
                   1442: sub end_solved {
1.248     albertel 1443:     return '';
                   1444: }
                   1445: 
                   1446: sub start_problemtype {
                   1447:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1448:     my $result;
                   1449:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1450: 	$target eq 'tex' || $target eq 'analyze') {
                   1451: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1452: 	if (!defined($mode)) { $mode='show'; }
                   1453: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1454: 	my $found=0;
                   1455: 	foreach my $type (split(',',$for)) {
                   1456: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1457: 	}
                   1458: 	if ($mode eq 'show' && !$found) {
                   1459: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1460: 	}
                   1461: 	if ($mode eq 'hide' && $found) {
                   1462: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1463: 	}
                   1464:     } elsif ($target eq 'edit') {
                   1465: 	$result .=&Apache::edit::tag_start($target,$token);
                   1466: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1467: 					   [['show','Show'],
                   1468: 					    ['hide','Hide']]
                   1469: 					   ,$token);
                   1470: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1471: 					     [ ['exam','Exam/Quiz Problem'],
                   1472: 					       ['survey','Survey'],
                   1473: 					       ['problem','Homework Problem'] ]
                   1474: 					     ,$token);
                   1475: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1476:     } elsif ($target eq 'modified') {
                   1477: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1478: 						     $safeeval,'mode','for');
                   1479: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1480:     }
                   1481:     return $result;
                   1482: }
                   1483: 
                   1484: sub end_problemtype {
1.159     albertel 1485:     return '';
1.24      albertel 1486: }
1.34      albertel 1487: 
                   1488: sub start_startouttext {
1.159     albertel 1489:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1490:     my @result=(''.'');
                   1491:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1492:     return (@result);
1.34      albertel 1493: }
1.159     albertel 1494: 
1.34      albertel 1495: sub end_startouttext {
1.159     albertel 1496:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1497:     my $result='';
                   1498:     my $text='';
                   1499: 
                   1500:     if ($target eq 'edit') {
                   1501: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser);
1.211     albertel 1502: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1503: <td>".&mt('Delete:').
1.159     albertel 1504:                  &Apache::edit::deletelist($target,$token)
                   1505: 		 ."</td>
1.42      albertel 1506: <td>".
1.159     albertel 1507:                  &Apache::edit::insertlist($target,$token).
                   1508: 		 &Apache::edit::end_row().
                   1509:                  &Apache::edit::start_spanning_row()."\n"
1.188     bowersj2 1510: 		 . &Apache::loncommon::helpLatexCheatsheet () .
1.255     www      1511: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1512:     }
                   1513:     if ($target eq 'modified') {
1.219     albertel 1514: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1515:     }
                   1516:     if ($target eq 'tex') {
                   1517: 	$result .= '\noindent ';
                   1518:     }
                   1519:     return $result;
1.34      albertel 1520: }
1.159     albertel 1521: 
1.34      albertel 1522: sub start_endouttext {
1.159     albertel 1523:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1524:     my $result='';
                   1525:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1526:     if ($target eq "modified") {
                   1527: 	$result='<endouttext />'.
                   1528: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1529:     return $result;
1.34      albertel 1530: }
1.159     albertel 1531: 
1.34      albertel 1532: sub end_endouttext {
1.159     albertel 1533:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1534:     my @result=('','');
                   1535:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1536:     return (@result);
1.34      albertel 1537: }
1.159     albertel 1538: 
1.45      albertel 1539: sub delete_startouttext {
1.159     albertel 1540:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1541:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
                   1542:     my $text=$$parser['-1']->get_text("/endouttext");
                   1543:     my $ntoken=$$parser['-1']->get_token();
                   1544:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1545:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1546:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1547:     # they did the last time round
                   1548:     &Apache::lonxml::increasedepth($ntoken);
                   1549:     &Apache::lonxml::decreasedepth($ntoken);
                   1550:     return 1;
1.193     www      1551: }
                   1552: 
                   1553: sub start_simpleeditbutton {
                   1554:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1555:     my $result='';
1.284     albertel 1556:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 1557: 	($target eq 'web') &&
1.284     albertel 1558:         (&Apache::lonnet::allowed('srm',$env{'request.course.id'}))) {
                   1559:         my $url=$env{'request.noversionuri'};
1.193     www      1560:         $url=~s/\?.*$//;
1.278     albertel 1561: 	my ($symb) = &Apache::lonxml::whichuser();
1.194     www      1562: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.278     albertel 1563:                 '<a href="'.$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      1564: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1565:     }
                   1566:     return $result;
                   1567: }
                   1568: 
                   1569: sub end_simpleeditbutton {
                   1570:     return '';
1.45      albertel 1571: }
1.34      albertel 1572: 
1.1       albertel 1573: 1;
                   1574: __END__

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