Annotation of loncom/homework/structuretags.pm, revision 1.312

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.312   ! albertel    4: # $Id: structuretags.pm,v 1.311 2005/11/03 12:20:54 foxr 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 $body_tag_start;
1.284     albertel  118:     if (!defined($found{'body'}) && $env{'request.state'} eq 'construct'
                    119: 	&& $env{'environment.remote'} eq 'off') {
1.298     albertel  120: 	if ($target eq 'web' || $target eq 'edit') {
1.297     albertel  121: 	    $body_tag_start=&Apache::loncommon::bodytag();
                    122: 	    $body_tag_start.=&Apache::lonxml::message_location();
                    123: 	}
1.272     albertel  124:     } elsif (!defined($found{'body'})) {
1.159     albertel  125: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    126: 						  $safeeval);
1.290     albertel  127: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    128: 					       $safeeval);
1.299     albertel  129: 	$body_tag_start=&body_tag_start($target,$background,$bgcolor);
1.291     albertel  130: 	if ( ($target eq 'web' || $target eq 'webgrade')
                    131: 	     && $env{'request.state'} ne 'construct') {
1.165     albertel  132: 	    my ($symb,undef,undef,undef,$publicuser)=
                    133: 		&Apache::lonxml::whichuser();
                    134: 	    if ($symb eq '' && !$publicuser) {
1.159     albertel  135: 		my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
1.211     albertel  136: 		$help=&mt("Browsing resource, all submissions are temporary.")."<br />";
1.159     albertel  137: 		$body_tag_start.=$help;
                    138: 	    }
                    139: 	}
1.245     albertel  140: 	$body_tag_start.=&Apache::lonxml::message_location();
1.159     albertel  141:     }
                    142:     my $form_tag_start;
                    143:     if (!defined($found{'form'})) {
1.281     albertel  144: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="POST" action="';
1.284     albertel  145: 	my $uri=$env{'request.uri'};
                    146: 	if ($env{'request.enc'}) { $uri=&Apache::lonenc::encrypted($uri); }
1.271     albertel  147: 	$form_tag_start.=$uri.'">';
1.159     albertel  148:     }
                    149:     return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.105     albertel  150: }
                    151: 
1.141     matthew   152: #use Time::HiRes();
1.105     albertel  153: sub get_resource_name {
1.159     albertel  154:     my ($parstack,$safeeval)=@_;
1.204     albertel  155:     if (defined($Apache::lonhomework::name)) {
                    156: 	return $Apache::lonhomework::name;
                    157:     }
1.279     albertel  158:     my ($symb)=&Apache::lonxml::whichuser();
                    159:     my $name=&Apache::lonnet::gettitle($symb);
1.159     albertel  160:     if ($name eq '') {
                    161: 	$name=&Apache::lonnet::EXT('resource.title');
                    162: 	if ($name eq 'con_lost') { $name = ''; }
                    163:     }
1.204     albertel  164:     if ($name!~/\S+/) {
1.284     albertel  165: 	$name=$env{'request.uri'};
1.205     albertel  166: 	$name=~s-.*/([^/]+)$-$1-;
1.204     albertel  167:     }
1.159     albertel  168:     $Apache::lonhomework::name=$name;
                    169:     return $name;
1.105     albertel  170: }
                    171: 
                    172: sub setup_rndseed {
1.159     albertel  173:     my ($safeeval)=@_;
                    174:     my $rndseed;
1.162     albertel  175:     my ($symb)=&Apache::lonxml::whichuser();
1.284     albertel  176:     if ($env{'request.state'} eq "construct" || $symb eq '' ||
1.247     albertel  177:           $Apache::lonhomework::history{'resource.CODE'}) {
1.284     albertel  178: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  179: 	if (!$rndseed) {
1.162     albertel  180: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    181: 	    if (!$rndseed) {
                    182: 		$rndseed=time;
                    183: 	    }
1.284     albertel  184: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  185: 	}
1.284     albertel  186: 	if ($env{'form.resetdata'} eq &mt('New Problem Variation') ||
                    187: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  188: 	    srand(time);
                    189: 	    $rndseed=int(rand(2100000000));
1.284     albertel  190: 	    $env{'form.rndseed'}=$rndseed;
                    191: 	    delete($env{'form.resetdata'});
                    192: 	    delete($env{'form.newrandomization'});
1.159     albertel  193: 	}
1.187     albertel  194: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
1.307     albertel  195: 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
1.187     albertel  196:         }
1.247     albertel  197:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    198: 	   $rndseed=&Apache::lonnet::rndseed();
                    199: 	}
1.221     albertel  200: 	if ($safeeval) {
                    201: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  202: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  203: 	}
1.159     albertel  204:     }
                    205:     return $rndseed;
1.105     albertel  206: }
                    207: 
1.268     albertel  208: sub remember_problem_state {
                    209:     return '
1.284     albertel  210:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    211:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    212:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  213: }
                    214: 
1.105     albertel  215: sub problem_edit_header {
1.268     albertel  216:     return '<input type="hidden" name="submitted" value="edit" />'.
                    217: 	&Apache::structuretags::remember_problem_state().'
1.210     albertel  218:        <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
1.243     matthew   219:        <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
                    220:        <input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
                    221:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> <hr />
                    222:        <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes and Edit').'" />
                    223:        <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
1.260     albertel  224:        &Apache::loncommon::help_open_menu('','Problem Editing Help','Problem_Editor_XML_Index','',5,'Authoring',undef,undef,undef,'Problem Editing Help')
                    225:        .'</td></tr></table>'.
1.282     albertel  226:        '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  227: }
                    228: 
                    229: sub problem_edit_footer {
1.210     albertel  230:     return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
1.255     www       231:     <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />'.
                    232:     &Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields).
1.280     albertel  233:     "\n</form>\n".&Apache::loncommon::endbodytag()."\n</html>";
1.105     albertel  234: }
                    235: 
1.235     albertel  236: sub option {
                    237:     my ($value,$name) = @_;
                    238:     my $result ="<option value='".$value."' ";
1.284     albertel  239:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  240: 	$result.=" selected='on' ";
                    241:     }
                    242:     $result.='>';
                    243:     return $result;
                    244: }
                    245: 
1.105     albertel  246: sub problem_web_to_edit_header {
1.159     albertel  247:     my ($rndseed)=@_;
1.210     albertel  248:     my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />
1.243     matthew   249:              <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
                    250:              <input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
                    251:              <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    252:              <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
1.210     albertel  253:              <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
1.270     albertel  254:               <input type="text" name="rndseed" size="10" value="'.
1.175     albertel  255: 	       $rndseed.'"
1.270     albertel  256:            onchange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
1.281     albertel  257:              <label><input type="checkbox" name="showallfoils" ';
1.284     albertel  258:     if (defined($env{'form.showallfoils'})) { $result.='checked="on"'; }
1.228     www       259:     $result.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    260: 	&Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
1.281     albertel  261: 	'</label><hr />';
1.235     albertel  262:     $result.="
                    263: <nobr>
                    264: Problem Status:
                    265: <select name='problemstate'>
1.270     albertel  266:   <option value=''></option>
1.235     albertel  267:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    268:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    269:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    270:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    271:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    272: </select>
                    273: </nobr>
                    274: <nobr>
                    275: Problem Type:
                    276: <select name='problemtype'>
1.270     albertel  277:   <option value=''></option>
1.242     albertel  278:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
                    279:   ".&option('problem','problemtype').&mt("Homework problem")."</option>
                    280:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.235     albertel  281: </select>
                    282: </nobr>
                    283: <nobr>
                    284: Feedback Mode:
                    285: <select name='problemstatus'>
                    286:   <option value=''></option>
1.242     albertel  287:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
                    288:   ".&option('no', 'problemstatus').&mt("Don't Show Feedback")."</option>
1.235     albertel  289: </select>
                    290: </nobr>
1.242     albertel  291: <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
1.235     albertel  292: <hr />";
1.284     albertel  293:     my $numtoanalyze=$env{'form.numtoanalyze'};
1.176     albertel  294:     if (!$numtoanalyze) { $numtoanalyze=20; }
1.210     albertel  295:     $result.= '<input type="submit" name="problemmode" value='.
                    296: 	&mt('"Calculate answers').'" /> for
1.136     albertel  297:              <input type="text" name="numtoanalyze" value="'.
1.210     albertel  298: 	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
                    299: 	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
1.176     albertel  300: 						     '',undef,undef,300).
1.210     albertel  301: 						     '<hr />';
1.159     albertel  302:     return $result;
1.48      albertel  303: }
                    304: 
1.65      albertel  305: sub initialize_storage {
1.159     albertel  306:     %Apache::lonhomework::results=();
1.162     albertel  307:     %Apache::lonhomework::history=();
1.159     albertel  308:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.284     albertel  309:     if ($env{'request.state'} eq 'construct' || $symb eq '') {
1.159     albertel  310: 	%Apache::lonhomework::history=
1.284     albertel  311: 	    &Apache::lonnet::tmprestore($env{'request.uri'},'',$domain,$name);
1.159     albertel  312: 	my ($temp)=keys %Apache::lonhomework::history ;
                    313: 	&Apache::lonxml::debug("Return message of $temp");
                    314:     } else {
                    315: 	%Apache::lonhomework::history=
                    316: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    317:     }
                    318:     #ignore error conditions
1.67      albertel  319:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  320:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  321: }
                    322: 
                    323: # -------------------------------------------------------------finalize_storage
                    324: # Stores away the result has to a student's environment
                    325: # checks form.grade_ for specific values, other wises stores
                    326: # to the running users environment
1.285     raeburn   327: # Will increment totals for attempts, students, and corrects
                    328: # if running user has student role.  
1.65      albertel  329: sub finalize_storage {
1.159     albertel  330:     my $result;
1.289     albertel  331:     if (%Apache::lonhomework::results) {
1.159     albertel  332: 	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.284     albertel  333: 	if ($env{'request.state'} eq 'construct' || $symb eq '') {
                    334: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  335: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.284     albertel  336: 					$env{'request.uri'},'',$domain,$name);
1.159     albertel  337: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    338: 	} else {
                    339: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    340: 					    $symb,$courseid,$domain,$name);
                    341: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   342:             if ($env{'request.role'} =~/^st/) {
                    343:                 &store_aggregates($symb,$courseid);
                    344:             }
1.159     albertel  345: 	}
1.67      albertel  346:     }
1.159     albertel  347:     return $result;
1.65      albertel  348: }
1.289     albertel  349: use Data::Dumper;
1.65      albertel  350: 
1.285     raeburn   351: # -------------------------------------------------------------store_aggregates
                    352: # Sends hash of values to be incremented in nohist_resourcetracker.db
                    353: # for the course. Increments total number of attempts, unique students 
                    354: # and corrects for each part for an instance of a problem, as appropriate.
                    355: sub store_aggregates {
                    356:     my ($symb,$courseid) = @_;
1.286     albertel  357:     my %aggregate;
                    358:     my @parts;
1.288     albertel  359:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    360:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  361:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  362:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  363:             push(@parts, $1);
1.285     raeburn   364:         }
                    365:     }
1.286     albertel  366:     foreach my $part (@parts) {
                    367:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    368: 	    eq 'APPROX_ANS' ||
                    369: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    370: 	    eq 'EXACT_ANS') {
1.287     albertel  371:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   372:         }
1.286     albertel  373:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  374:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   375:         } else {
1.293     albertel  376:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   377:             if ($last_reset) {
1.293     albertel  378:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   379:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    380:                 }
                    381:             }
1.285     raeburn   382:         }
1.287     albertel  383:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   384:     }
1.292     raeburn   385:     if (keys (%aggregate) > 0) {
1.289     albertel  386: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   387:                             $cdomain,$cname);
                    388:     }
                    389: }
1.289     albertel  390: 
1.65      albertel  391: sub checkout_msg {
1.211     albertel  392:     my %lt=&Apache::lonlocal::texthash( 
                    393: 		'resource'=>'The resource needs to be checked out',
                    394: 		'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.',
                    395:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    396:                 'checkout'=>'Check out Exam for Viewing',
                    397: 		'checkout?'=>'Check out Exam?');
1.159     albertel  398:     return (<<ENDCHECKOUT);
1.211     albertel  399: <h2>$lt{'resource'}</h2>
                    400:     <p>$lt{'id_expln'}</p>
                    401: <font color="red">
                    402: <p>$lt{'warning'}</p>
1.91      albertel  403: </font>
1.284     albertel  404: <form name="checkout" method="POST" action="$env{'request.uri'}">
1.91      albertel  405: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  406: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  407: </form>
                    408: ENDCHECKOUT
                    409: }
                    410: 
1.252     albertel  411: sub firstaccess_msg {
1.253     albertel  412:     my ($time,$symb)=@_;
                    413:     my ($map)=&Apache::lonnet::decode_symb($symb);
                    414:     my $foldertitle=&Apache::lonnet::gettitle($map);
                    415:     &Apache::lonxml::debug("map is $map title is $foldertitle");
1.252     albertel  416:     return (<<ENDCHECKOUT);
1.253     albertel  417: <h2>The resources in "$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  418: <form name="markaccess" method="POST" action="$env{'request.uri'}">
1.252     albertel  419: <input type="hidden" name="markaccess" value="yes" />
                    420: <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
                    421: </form>
                    422: ENDCHECKOUT
                    423: }
                    424: 
1.204     albertel  425: sub init_problem_globals {
                    426:     my ($type)=@_;
                    427:     #initialize globals
1.308     foxr      428:     #   For problems, we start out in part 0 (outside a <part> tag).
                    429:     #   and part 0 is used to describe the main body of the <problem>
                    430:     #
1.204     albertel  431:     if ($type eq 'problem') {
                    432: 	$Apache::inputtags::part='0';
                    433: 	@Apache::inputtags::partlist=('0');
1.266     albertel  434: 	$Apache::lonhomework::problemstatus=&get_problem_status('0');
                    435: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      436: 
1.266     albertel  437:     } elsif ($type eq 'library') {
1.204     albertel  438: 	$Apache::inputtags::part='';
                    439: 	@Apache::inputtags::partlist=();
                    440: 	$Apache::lonhomework::problemstatus='';	
1.266     albertel  441: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      442: 
1.304     albertel  443:     } elsif ($type eq 'Task') {
                    444: 	$Apache::inputtags::part='0';
                    445: 	@Apache::inputtags::partlist=('0');
                    446: 	$Apache::lonhomework::problemstatus='';	
                    447: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  448:     }
                    449:     @Apache::inputtags::responselist = ();
                    450:     @Apache::inputtags::importlist = ();
                    451:     @Apache::inputtags::previous=();
                    452:     @Apache::inputtags::previous_version=();
                    453:     $Apache::structuretags::printanswer='No';
                    454:     @Apache::structuretags::whileconds=();
                    455:     @Apache::structuretags::whilebody=();
                    456:     @Apache::structuretags::whileline=();
                    457:     $Apache::lonhomework::scantronmode=0;
                    458:     undef($Apache::lonhomework::name);
                    459: 
                    460: }
                    461: 
                    462: sub reset_problem_globals {
                    463:     my ($type)=@_;
                    464:     undef(%Apache::lonhomework::history);
                    465:     undef(%Apache::lonhomework::results);
                    466:     undef($Apache::inputtags::part);
1.208     albertel  467: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    468: #detect if we try to do 2 problems in one file
                    469: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  470:     undef($Apache::lonhomework::name);
                    471: }
                    472: 
1.241     albertel  473: sub set_problem_state {
1.240     albertel  474:     my ($part)=@_;
1.284     albertel  475:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  476: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    477: 	    'correct_by_student';
                    478:     }
                    479: }
                    480: 
1.241     albertel  481: sub get_problem_status {
                    482:     my ($part)=@_;
1.267     albertel  483:     my $problem_status;
1.284     albertel  484:     if ($env{'request.state'} eq 'construct' &&
                    485: 	defined($env{'form.problemstatus'})) {
                    486: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  487:     } else {
                    488: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    489: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  490: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  491:     }
                    492:     return $problem_status;
                    493: }
                    494: 
1.9       albertel  495: sub start_problem {
1.159     albertel  496:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19      albertel  497: 
1.311     foxr      498:     # We'll use the redirection to fix up printing of duedates.
1.312   ! albertel  499:     &Apache::lonxml::startredirection();
1.311     foxr      500: 
1.308     foxr      501:     # Problems don't nest and we don't allow more than one <problem> in
                    502:     # a .problem file.
                    503:     #
1.184     albertel  504:     if ( $Apache::inputtags::part ne '' ||
                    505: 	 $Apache::lonhomework::parsing_a_problem) {
                    506: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
                    507: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
1.159     albertel  508: 	return '';
                    509:     }
1.184     albertel  510: 
                    511:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  512:     &init_problem_globals('problem');
1.166     albertel  513: 
1.284     albertel  514:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  515: 	$Apache::lonhomework::scantronmode=1;
                    516:     }
1.161     albertel  517: 
1.246     albertel  518:     &initialize_storage();
1.159     albertel  519:     if ($target ne 'analyze') {
                    520: 	if ($target eq 'web') {
                    521: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
1.238     albertel  522: 	}
1.284     albertel  523:        	if ($env{'request.state'} eq 'construct') { &set_problem_state('0'); }
1.159     albertel  524: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.284     albertel  525: 	if (($env{'request.state'} eq 'construct') &&
                    526: 	    defined($env{'form.problemtype'})) {
                    527: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  528: 	}
1.240     albertel  529: 	&Apache::lonxml::debug("Found this to be of type :$Apache::ltonhomework::type:");
1.159     albertel  530:     }
1.164     albertel  531:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  532: 	my $uri=$env{'request.uri'};
1.159     albertel  533: 	if ($uri=~/\.(\w+)$/) {
                    534: 	    $Apache::lonhomework::type=$1;
                    535: 	    &Apache::lonxml::debug("Using type of $1");
                    536: 	} else {
                    537: 	    $Apache::lonhomework::type='problem';
                    538: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    539: 	}
1.87      albertel  540:     }
1.301     albertel  541:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       542: 
1.159     albertel  543:     #added vars to the scripting enviroment
1.213     albertel  544:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  545:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  546:     &Apache::run::run($expression,$safeeval);
1.159     albertel  547:     my $status;
                    548:     my $accessmsg;
                    549: 
                    550:     #should get back a <html> or the neccesary stuff to start XML/MathML
                    551:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    552: 	&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
1.284     albertel  553:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  554: 
                    555:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    556:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    557: 	$target eq 'tex') {
                    558: 	#handle exam checkout
                    559: 	if ($Apache::lonhomework::type eq 'exam') {
                    560: 	    my $token=
                    561: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  562: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  563: 		$token=&Apache::lonxml::maketoken();
                    564: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    565: 		    $token;
                    566: 	    }
                    567: 	    $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  568: 	}
1.284     albertel  569: 	if ($env{'form.markaccess'}) {
1.252     albertel  570: 	    &Apache::lonnet::set_first_access('map');
                    571: 	}
1.159     albertel  572: 	#handle rand seed in construction space
                    573: 	my $rndseed=&setup_rndseed($safeeval);
1.162     albertel  574: 	my ($symb)=&Apache::lonxml::whichuser();
1.284     albertel  575: 	if ($env{'request.state'} ne "construct" && $symb eq '') {
1.162     albertel  576: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    577: 		$rndseed.'" />'.
                    578: 		    '<input type="submit" name="resetdata"
1.211     albertel  579:                              value="'.&mt('New Problem Variation').'" />'.
1.164     albertel  580: 		    '<input type="hidden" name="username"
1.284     albertel  581:                              value="'.$env{'form.username'}.'" />';
                    582: 	    if ($env{'user.adv'}) {
1.267     albertel  583: 		$form_tag_start.=
1.300     albertel  584: 		    ' <label><input type="checkbox" name="showallfoils" ';
1.284     albertel  585: 		if (defined($env{'form.showallfoils'})) {
1.267     albertel  586: 		    $form_tag_start.='checked="on"';
                    587: 		}
1.300     albertel  588: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    589: 		    '</label>';
1.267     albertel  590: 	    }
                    591: 	    $form_tag_start.='<hr />';
1.162     albertel  592: 	}
1.159     albertel  593: 	($status,$accessmsg) = &Apache::lonhomework::check_access('0');
                    594: 	push (@Apache::inputtags::status,$status);
                    595: 	my $expression='$external::datestatus="'.$status.'";';
                    596: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    597: 	&Apache::run::run($expression,$safeeval);
                    598: 	&Apache::lonxml::debug("Got $status");
                    599: 	if (( $status eq 'CLOSED' ) ||
                    600: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  601: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  602: 	    ( $status eq 'BANNED') ||
1.216     albertel  603: 	    ( $status eq 'UNAVAILABLE') ||
                    604: 	    ( $status eq 'INVALID_ACCESS')) {
1.159     albertel  605: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
                    606: 	    if ( $target eq "web" ) {
                    607: 		$result.= $head_tag_start.'</head>';
                    608: 		my $msg=$body_tag_start;
                    609: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  610: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  611: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  612: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  613: 		}
1.216     albertel  614: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.159     albertel  615: 		    $msg.='The problem '.$accessmsg;
                    616: 		} elsif ($status eq 'UNCHECKEDOUT') {
                    617: 		    $msg.=&checkout_msg;
1.252     albertel  618: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  619: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.159     albertel  620: 		}
                    621: 		$result.=$msg.'<br />';
                    622: 	    } elsif ($target eq 'tex') {
                    623: 		$result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
                    624: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  625: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  626: 		} else {
1.211     albertel  627: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  628: 		}
                    629: 	    }
                    630: 	} elsif ($target eq 'web') {
                    631: 	    my $name= &get_resource_name($parstack,$safeeval);
1.227     albertel  632: 	    $result.="$head_tag_start<title>$name</title></head>
1.158     sakharuk  633:               $body_tag_start \n $form_tag_start".	
1.227     albertel  634: 	      '<input type="hidden" name="submitted" value="yes" />';
                    635: 	    # create a page header and exit
1.284     albertel  636: 	    if ($env{'request.state'} eq "construct") {
                    637: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.227     albertel  638: 	    }
                    639: 	    # if we are viewing someone else preserve that info
1.284     albertel  640: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel  641: 		foreach my $field ('symb','courseid','domain','username') {
                    642: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel  643: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel  644: 		}
                    645: 	    }
                    646: 	} elsif ($target eq 'tex') {
1.192     sakharuk  647: 	    my $startminipage = '';
1.284     albertel  648: 	    if (not $env{'form.problem_split'}=~/yes/) {
1.192     sakharuk  649: 		$startminipage = '\begin{minipage}{\textwidth}';
1.178     sakharuk  650: 	    }
1.159     albertel  651: 	    my $id = $Apache::inputtags::part;
                    652: 	    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel  653: 	    my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.223     sakharuk  654: 	    my @packages = split /,/,$packages;
                    655: 	    my $allow_print_points = 0;
                    656: 	    foreach my $partial_key (@packages) {
1.230     albertel  657: 		if ($partial_key=~m/^part_0$/) {
1.223     sakharuk  658: 		    $allow_print_points=1;
1.159     albertel  659: 		}
                    660: 	    }
1.276     albertel  661: 	    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    662: 	    if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
1.302     albertel  663: 	    if (lc($env{'course.'.$env{'request.course.id'}.
                    664: 			    '.disableexampointprint'}) eq 'yes') {
                    665: 		$allow_print_points=0;
                    666: 	    }
1.308     foxr      667: 	    my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
                    668: 	    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 ';
                    669: 	    my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                    670: 		'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                    671: 
1.312   ! albertel  672: 	    #  Figure out what the due date is and if we need to print
        !           673: 	    #  it in the problem header.  We have been logging the
        !           674: 	    #  last due date written to file. 
1.308     foxr      675: 
                    676: 	    my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    677: 	    my $duedate = POSIX::strftime("%c",localtime($duetime));
1.159     albertel  678: 	    my $temp_file;
1.284     albertel  679: 	    my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
1.308     foxr      680: 
1.312   ! albertel  681: 	    # Figure out what the last printed due date is or set it
        !           682: 	    # to the epoch if no duedates have been printed.
1.308     foxr      683: 
                    684: 	    my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
1.159     albertel  685: 	    if (-e $filename) {
                    686: 		$temp_file = Apache::File->new($filename);
1.308     foxr      687: 		my @due_file      = <$temp_file>;
                    688: 		$due_file_content = $due_file[$#due_file];
                    689: 		chomp $due_file_content;
                    690: 	    } 
1.312   ! albertel  691: 
        !           692: 	    # comparisons of the absolute times
1.309     foxr      693: 	    if ($due_file_content != $duetime) {
1.159     albertel  694: 		$temp_file = Apache::File->new('>'.$filename);
1.308     foxr      695: 		print $temp_file "$duetime\n";
1.284     albertel  696: 		if (not $env{'request.symb'} =~ m/\.page_/) {
1.159     albertel  697: 		    if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
1.304     albertel  698: 			$result .= $begin_doc.
                    699: 			    '\textit{Due date: '.$duedate.'} '.$toc_line;
1.159     albertel  700: 		    } else {
1.304     albertel  701: 			$result .= $begin_doc.$toc_line;
1.159     albertel  702: 			if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    703: 		    }
1.104     sakharuk  704: 		} else {
1.159     albertel  705: 		    $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
1.104     sakharuk  706: 		}
1.101     sakharuk  707: 	    } else {
1.284     albertel  708: 		if (not $env{'request.symb'} =~ m/\.page_/) {
1.304     albertel  709: 		    $result .= $begin_doc.$toc_line;
1.159     albertel  710: 		    if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    711: 		} else {
                    712: 		    $result .= '\vskip 1mm \\\\\\\\';
                    713: 		}
                    714: 	    }
1.99      sakharuk  715: 	}
1.159     albertel  716:     } elsif ($target eq 'edit') {
                    717: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    718: 	    &problem_edit_header();
1.226     albertel  719: 	$Apache::lonxml::warnings_error_header=
                    720: 	    &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  721: 	my $temp=&Apache::edit::insertlist($target,$token);
                    722: 	$result.=$temp;
                    723:     } elsif ($target eq 'modified') {
                    724: 	$result=$token->[4];
                    725: 	$result.=&Apache::edit::handle_insert();
                    726:     } else {
                    727: 	# page_start returned a starting result, delete it if we don't need it
                    728: 	$result = '';
1.99      sakharuk  729:     }
1.159     albertel  730:     return $result;
1.9       albertel  731: }
                    732: 
                    733: sub end_problem {
1.159     albertel  734:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.312   ! albertel  735:     my $result= &Apache::lonxml::endredirection(); # started in &start_problem
1.310     foxr      736: 
1.159     albertel  737:     my $status=$Apache::inputtags::status['-1'];
                    738:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    739: 	$target eq 'tex') {
1.249     albertel  740: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel  741: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel  742: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                    743: 		&Apache::inputtags::grade;
                    744: 	    } else {
                    745: 		# move any submission data to .hidden
                    746: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                    747: 	    }
1.159     albertel  748: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    749: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel  750: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel  751: 	    # if part is zero, no <part>s existed, so we need show the current
                    752: 	    # grading status
                    753: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    754: 	    $result.= $gradestatus;
                    755: 	}
                    756: 	if (
1.284     albertel  757: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel  758: 	    ($target eq 'answer') || ($target eq 'tex')
                    759: 	   ) {
1.227     albertel  760: 	    if ($target ne 'tex' &&
1.284     albertel  761: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www       762: 		$result.="</form>";
                    763: 		$result.=&Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields);
1.159     albertel  764: 	    }
                    765: 	    if ($target eq 'web') {
1.281     albertel  766: 		$result.=&Apache::lonxml::xmlend().'</html>';
1.159     albertel  767: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  768: 		my $endminipage = '';
1.284     albertel  769: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk  770: 		    $endminipage = '\end{minipage}';
                    771: 		}
1.284     albertel  772:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk  773: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.257     sakharuk  774: 		    $result=~s/<\/html>//;
1.159     albertel  775: 		} else {
1.262     sakharuk  776: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel  777: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk  778: 			$result .= $endminipage.'\end{document} ';
                    779: 		    } else {
                    780: 			$result .= '';
                    781: 		    }
1.159     albertel  782: 		}
                    783: 	    }
                    784: 	}
                    785: 	if ($target eq 'grade') {
                    786: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    787: 	    &finalize_storage();
                    788: 	}
1.284     albertel  789: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                    790: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.294     albertel  791: 	    $result.=&Apache::lonxml::xmlend().'</html>';
                    792: 	                        # normally we get it from above, but in CSTR
1.172     albertel  793: 	                        # we always show answer mode too.
1.159     albertel  794: 	}
                    795:     } elsif ($target eq 'meta') {
                    796: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  797: 	    @Apache::inputtags::response=();
1.159     albertel  798: 	    $result=&Apache::response::mandatory_part_meta;
                    799: 	}
1.215     albertel  800: 	$result.=&Apache::response::meta_part_order();
1.258     albertel  801: 	$result.=&Apache::response::meta_response_order();
1.159     albertel  802:     } elsif ($target eq 'edit') {
                    803: 	&Apache::lonxml::debug("in end_problem with $target, edit");
                    804: 	$result = &problem_edit_footer();
                    805:     }
1.155     albertel  806: 
1.284     albertel  807:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel  808: 	&Apache::inputtags::check_for_duplicate_ids();
                    809:     }
1.204     albertel  810: 
                    811:     &reset_problem_globals('problem');
1.159     albertel  812: 
                    813:     return $result;
1.48      albertel  814: }
                    815: 
1.108     albertel  816: 
1.48      albertel  817: sub start_library {
1.159     albertel  818:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    819:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.244     albertel  820:     if ($$tagstack[0] eq 'library') {
                    821: 	&init_problem_globals('library');
                    822: 	$Apache::lonhomework::type='problem';
                    823:     }
1.159     albertel  824:     if ($target eq 'edit') {
                    825: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    826: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    827: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    828: 	    &problem_edit_header();
                    829: 	my $temp=&Apache::edit::insertlist($target,$token);
                    830: 	$result.=$temp;
                    831:     } elsif ($target eq 'modified') {
                    832: 	$result=$token->[4];
                    833: 	$result.=&Apache::edit::handle_insert();
                    834:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel  835: 	     $env{'request.state'} eq "construct" ) {
1.159     albertel  836: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    837: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    838: 	my $name=&get_resource_name($parstack,$safeeval);
                    839: 	my $rndseed=&setup_rndseed($safeeval);
                    840: 	$result.="$head_tag_start<title>$name</title></head>
1.105     albertel  841:               $body_tag_start \n $form_tag_start".	
1.159     albertel  842: 		  '<input type="hidden" name="submitted" value="yes" />';
                    843: 	$result.=&problem_web_to_edit_header($rndseed);
                    844:     }
                    845:     return $result;
1.48      albertel  846: }
                    847: 
                    848: sub end_library {
1.159     albertel  849:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    850:     my $result='';
                    851:     if ($target eq 'edit') {
                    852: 	$result=&problem_edit_footer();
                    853:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel  854: 	     $env{'request.state'} eq "construct") {
1.280     albertel  855: 	$result.='</form>'.&Apache::loncommon::endbodytag().
                    856: 	    &Apache::lonxml::xmlend();
1.159     albertel  857:     }
1.204     albertel  858:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel  859:     return $result;
1.197     www       860: }
                    861: 
                    862: sub start_definetag {
                    863:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    864: 
                    865:     my $result;
                    866: 
                    867:     my $name = $token->[2]->{'name'};
                    868:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
                    869:     if ($name=~/^\//) {
                    870: 	$result=
                    871:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                    872:     } else {
                    873: 	$result=
                    874:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                    875:     }
                    876:     $skip=~s/\</\&lt\;/gs;
                    877:     $skip=~s/\>/\&gt\;/gs;
                    878:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                    879:     return $result;
                    880: }
                    881: 
                    882: sub end_definetag {
                    883:     return '';
1.1       albertel  884: }
                    885: 
                    886: sub start_block {
1.201     albertel  887:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel  888: 
                    889:     my $result;
1.1       albertel  890: 
1.160     albertel  891:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.131     albertel  892: 	$target eq 'tex' || $target eq 'analyze') {
1.159     albertel  893: 	my $code = $token->[2]->{'condition'};
1.201     albertel  894: 	if (defined($code)) {
1.137     albertel  895: 	    if (!$Apache::lonxml::default_homework_loaded) {
                    896: 		&Apache::lonxml::default_homework_load($safeeval);
                    897: 	    }
1.131     albertel  898: 	    $result = &Apache::run::run($code,$safeeval);
                    899: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                    900: 	} else {
                    901: 	    $result='1';
                    902: 	}
                    903: 	if ( ! $result ) {
1.201     albertel  904: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel  905: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    906: 	}
                    907: 	$result='';
                    908:     } elsif ($target eq 'edit') {
                    909: 	$result .=&Apache::edit::tag_start($target,$token);
                    910: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                    911: 					  $token,40);
                    912: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    913:     } elsif ($target eq 'modified') {
                    914: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    915: 						     $safeeval,'condition');
                    916: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel  917:     }
1.131     albertel  918:     return $result;
1.1       albertel  919: }
                    920: 
                    921: sub end_block {
1.167     www       922:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    923:     my $result;
                    924:     if ($target eq "edit") {
                    925: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    926:     }
                    927:     return $result;
                    928: }
                    929: 
                    930: sub start_languageblock {
1.201     albertel  931:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www       932: 
                    933:     my $result;
                    934: 
                    935:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    936: 	$target eq 'tex' || $target eq 'analyze') {
1.201     albertel  937: 	my $include = $token->[2]->{'include'};
                    938: 	my $exclude = $token->[2]->{'exclude'};
                    939:         my %languages=&Apache::loncommon::display_languages();
                    940:         $result='1';
                    941: 	if ($include) {
                    942:             $result='';
                    943:             foreach (split(/\,/,$include)) {
                    944:                 if ($languages{$_}) { $result='1'; }
                    945:             }
                    946: 	}
                    947:         if ($exclude) {
                    948:             foreach (split(/\,/,$exclude)) {
                    949:                 if ($languages{$_}) { $result='0'; }
                    950:             }
                    951: 	}
                    952: 	if ( ! $result ) {
                    953: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                    954: 						   $style);
                    955: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    956: 	}
                    957: 	$result='';
1.167     www       958:     } elsif ($target eq 'edit') {
                    959: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel  960: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www       961: 					  $token,40);
1.211     albertel  962: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www       963: 					  $token,40);
                    964: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    965:     } elsif ($target eq 'modified') {
                    966: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel  967: 						     $safeeval,'include',
                    968: 						     'exclude');
1.167     www       969: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                    970:     }
                    971:     return $result;
                    972: }
                    973: 
                    974: sub end_languageblock {
1.170     www       975:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    976:     my $result;
1.201     albertel  977:     if ($target eq "edit") {
1.170     www       978: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    979:     }
                    980:     return $result;
                    981: }
                    982: 
                    983: sub start_instructorcomment {
1.201     albertel  984:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www       985: 
                    986:     my $result;
                    987: 
                    988:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    989: 	$target eq 'tex' || $target eq 'analyze') {
1.284     albertel  990:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                    991: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel  992: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                    993: 						   $parser,$style);
1.170     www       994: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    995: 	}
                    996: 	$result='';
                    997:     } elsif ($target eq 'edit') {
                    998: 	$result .=&Apache::edit::tag_start($target,$token);
                    999: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1000:     }
                   1001:     return $result;
                   1002: }
                   1003: 
                   1004: sub end_instructorcomment {
1.159     albertel 1005:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1006:     my $result;
                   1007:     if ($target eq "edit") {
                   1008: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1009:     }
                   1010:     return $result;
1.4       tsai     1011: }
                   1012: 
                   1013: sub start_while {
1.159     albertel 1014:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1015: 
1.160     albertel 1016:     my $result;
1.161     albertel 1017:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.160     albertel 1018: 	$target eq 'tex' || $target eq 'analyze') {
                   1019: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1020: 
1.160     albertel 1021: 	push( @Apache::structuretags::whileconds, $code);
                   1022: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1023: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1024: 	}
                   1025: 	my $result = &Apache::run::run($code,$safeeval);
1.161     albertel 1026: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
1.160     albertel 1027: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1028: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1029: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1030: 	if ( $result ) {
                   1031: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1032: 	}
                   1033:     } elsif ($target eq 'edit') {
                   1034: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1035: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1036: 					  $token,40);
                   1037: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1038:     } elsif ($target eq 'modified') {
                   1039: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1040: 						     $safeeval,'condition');
                   1041: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1042:     }
1.160     albertel 1043:     return $result;
1.4       tsai     1044: }
                   1045: 
                   1046: sub end_while {
1.159     albertel 1047:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1048:     my $result;
                   1049: 
                   1050:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1051: 	$target eq 'tex' || $target eq 'analyze') {
                   1052: 	my $code = pop(@Apache::structuretags::whileconds);
                   1053: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1054: 	my $line = pop(@Apache::structuretags::whileline);
                   1055: 	my $return = &Apache::run::run($code,$safeeval);
                   1056: 	my $starttime=time;
                   1057: 	my $error=0;
                   1058: 	while ($return) {
                   1059: 	    if (time-$starttime >
                   1060: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.270     albertel 1061: 		#$return = 0; $error=1; next;
1.161     albertel 1062: 	    }
                   1063: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                   1064: 	    $return = &Apache::run::run($code,$safeeval);
                   1065: 	}
                   1066: 	if ($error) {
1.270     albertel 1067: 	    &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 1068: 	}
                   1069:     } elsif ($target eq "edit") {
                   1070: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1071:     }
1.160     albertel 1072:     return $result;
1.1       albertel 1073: }
1.6       tsai     1074: 
1.160     albertel 1075: # <randomlist show="1">
1.6       tsai     1076: #  <tag1>..</tag1>
                   1077: #  <tag2>..</tag2>
                   1078: #  <tag3>..</tag3>
1.160     albertel 1079: #  ...
1.6       tsai     1080: # </randomlist>
                   1081: sub start_randomlist {
1.159     albertel 1082:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1083:     my $result;
                   1084:     if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
                   1085: 	$target eq 'tex' || $target eq 'analyze') {
                   1086: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1087: 	my $b_parser= HTML::LCParser->new(\$body);
                   1088: 	$b_parser->xml_mode(1);
                   1089: 	$b_parser->marked_sections(1);
1.159     albertel 1090: 	my $b_tok;
                   1091: 	my @randomlist;
                   1092: 	my $list_item;
                   1093: 	while($b_tok = $b_parser->get_token() ) {
                   1094: 	    if($b_tok->[0] eq 'S') { # start tag
                   1095: 		# get content of the tag until matching end tag
                   1096: 		# get all text upto the matching tag
                   1097: 		# and push the content into @randomlist
                   1098: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1099: 							   $b_parser);
                   1100: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1101: 		push(@randomlist,$list_item);
                   1102: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1103:                 #         $list_item</b>";
                   1104: 	    }
                   1105: 	    if($b_tok->[0] eq 'T') { # text
                   1106: 		# what to do with text in between tags?
                   1107: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1108: 	    }
                   1109: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1110: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1111: 	    # }
                   1112: 	}
1.303     albertel 1113: 	if (@randomlist) {
                   1114: 	    my @idx_arr = (0 .. $#randomlist);
                   1115: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1116: 	    my $bodytext = '';
                   1117: 	    my $show=$#randomlist;
                   1118: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1119: 	    $showarg--;
                   1120: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                   1121: 	    for(0 .. $show) {
                   1122: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1123: 	    }
                   1124: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1125: 	}
                   1126:     } elsif ($target eq 'edit' ) {
                   1127: 	$result .=&Apache::edit::tag_start($target,$token);
                   1128: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1129: 					   $token,5);
                   1130: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1131:     } elsif ($target eq 'modified' ) {
                   1132: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1133: 						     $safeeval,'show');
                   1134: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1135:     }
                   1136:     return $result;
1.7       tsai     1137: }
                   1138: 
                   1139: sub shuffle {
                   1140:     my $a=shift;
                   1141:     my $i;
1.303     albertel 1142:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1143: 	&Apache::response::pushrandomnumber();
1.159     albertel 1144: 	for($i=@$a;--$i;) {
                   1145: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1146: 	    next if $i == $j;
                   1147: 	    @$a[$i,$j] = @$a[$j,$i];
                   1148: 	}
1.251     albertel 1149: 	&Apache::response::poprandomnumber();
1.7       tsai     1150:     }
1.6       tsai     1151: }
                   1152: 
                   1153: sub end_randomlist {
1.159     albertel 1154:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1155:     my $result;
                   1156:     if ($target eq 'edit' ) {
                   1157: 	$result=&Apache::edit::tag_end($target,$token,
                   1158: 				       'End Randomly Parsed Block');
                   1159:     }
                   1160:     return $result;
1.6       tsai     1161: }
                   1162: 
1.283     albertel 1163: sub ordered_show_check {
                   1164:     my $last_part=$Apache::inputtags::partlist[-2];
                   1165:     my $in_order=
                   1166: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1167:     my $in_order_show=1;
                   1168:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1169: 	$in_order_show=&Apache::response::check_status($last_part);
                   1170:     }
                   1171:     return $in_order_show;
                   1172: }
                   1173: 
1.11      albertel 1174: sub start_part {
1.159     albertel 1175:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.312   ! albertel 1176:     &Apache::lonxml::startredirection(); # we'll use redirection to fix up 
        !          1177:                                          # duedates.
1.159     albertel 1178:     my $result='';
                   1179:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1.296     albertel 1180:     if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1.159     albertel 1181:     $Apache::inputtags::part=$id;
1.177     albertel 1182:     push(@Apache::inputtags::partlist,$id);
                   1183:     @Apache::inputtags::response=();
1.159     albertel 1184:     @Apache::inputtags::previous=();
                   1185:     @Apache::inputtags::previous_version=();
1.241     albertel 1186:     $Apache::lonhomework::problemstatus=&get_problem_status($id);
1.159     albertel 1187:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1188:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1189:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1190:     my $in_order_show=&ordered_show_check();
1.214     albertel 1191:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1192:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1193:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1194: 
                   1195:     if ($target eq 'meta') {
1.224     www      1196: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1197: 	return &Apache::response::mandatory_part_meta.
                   1198: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1199:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1200: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1201: 	if ($hidden || !$in_order_show) {
1.159     albertel 1202: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1203: 	} else {
                   1204: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1205: 	    push (@Apache::inputtags::status,$status);
                   1206: 	    my $expression='$external::datestatus="'.$status.'";';
                   1207: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1208: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1209: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1210: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1211: 	    }
1.216     albertel 1212: 	    if (( $status eq 'CLOSED' ) ||
                   1213: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1214: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1215: 		( $status eq 'BANNED') ||
                   1216: 		( $status eq 'UNAVAILABLE') ||
                   1217: 		( $status eq 'INVALID_ACCESS')) {
1.159     albertel 1218: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1219: 		if ( $target eq "web" ) {
1.211     albertel 1220: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1221: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1222: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1223: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1224: 		    } else {
1.211     albertel 1225: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1226: 		    }
1.159     albertel 1227: 		}
                   1228: 	    } else {
                   1229: 		if ($target eq 'tex') {
1.284     albertel 1230: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1231: 			if ($$tagstack[-2] eq 'td') {
                   1232: 			    $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1233: 			} else {
                   1234: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1235: 			}
1.195     sakharuk 1236: 		    }
1.159     albertel 1237: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1238: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1239: 		    my @allkeys = split /,/,$allkeys;
                   1240: 		    my $allow_print_points = 0;
                   1241: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1242: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1243: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1244: 			}
                   1245: 		    }
1.275     albertel 1246: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1247: 		    if (defined($maxtries) && $maxtries < 0) {
                   1248: 			$allow_print_points=0;
                   1249: 		    }
1.302     albertel 1250: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1251: 				    '.disableexampointprint'}) eq 'yes') {
                   1252: 			$allow_print_points=0;
                   1253: 		    }
1.222     sakharuk 1254: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1255: 		} elsif ($target eq 'web') {
                   1256: 		    $result.='<a name="'.&Apache::lonnet::escape($Apache::inputtags::part).'" />';
1.159     albertel 1257: 		}
                   1258: 	    }
                   1259: 	}
                   1260:     } elsif ($target eq 'edit') {
                   1261: 	$result.=&Apache::edit::tag_start($target,$token);
                   1262: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1263: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1264: 	    '&nbsp;&nbsp;'.
                   1265: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1266: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1267:     } elsif ($target eq 'modified') {
                   1268: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1269: 						     $safeeval,'id','display');
1.159     albertel 1270: 	if ($constructtag) {
1.225     albertel 1271: 	    #limiting ids to only letters numbers, and space
1.224     www      1272: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1273: 	    $result = &Apache::edit::rebuild_tag($token);
                   1274: 	    $result.=&Apache::edit::handle_insert();
                   1275: 	}
                   1276:     }
                   1277:     return $result;
1.11      albertel 1278: }
                   1279: 
                   1280: sub end_part {
1.159     albertel 1281:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1282:     &Apache::lonxml::debug("in end_part $target ");
                   1283:     my $status=$Apache::inputtags::status['-1'];
                   1284:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1285:     my $in_order_show=&ordered_show_check();
1.312   ! albertel 1286:     my $result= &Apache::lonxml::endredirection(); # started in &start_part
        !          1287:     if ($target eq 'grade') {
1.249     albertel 1288: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1289: 	    !$hidden && $in_order_show) {
1.311     foxr     1290: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1291: 	} else {
                   1292: 	    # move any submission data to .hidden
                   1293: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1294: 	}
1.283     albertel 1295:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1296: 	     !$hidden && $in_order_show) {
1.159     albertel 1297: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1298: 							$target);
1.212     albertel 1299: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1300: 	    $gradestatus='';
                   1301: 	}
1.311     foxr     1302: 	$result.=$gradestatus;
1.265     sakharuk 1303: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1304:     } elsif ($target eq 'edit') {
1.311     foxr     1305: 	$result.=&Apache::edit::end_table();
1.159     albertel 1306:     }
                   1307:     pop @Apache::inputtags::status;
                   1308:     $Apache::inputtags::part='';
1.295     albertel 1309:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1310:     return $result;
1.11      albertel 1311: }
1.1       albertel 1312: 
1.25      albertel 1313: sub start_preduedate {
1.159     albertel 1314:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1315:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
1.236     albertel 1316: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1317: 	if (!$Apache::lonhomework::scantronmode &&
                   1318: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1319: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1320: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.159     albertel 1321: 	    &Apache::lonxml::get_all_text("/preduedate",$parser);
                   1322: 	}
1.24      albertel 1323:     }
1.159     albertel 1324:     return '';
1.24      albertel 1325: }
                   1326: 
1.25      albertel 1327: sub end_preduedate {
1.159     albertel 1328:     return '';
1.24      albertel 1329: }
                   1330: 
1.25      albertel 1331: sub start_postanswerdate {
1.159     albertel 1332:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.234     albertel 1333:     if ($target eq 'web' || $target eq 'grade') {
1.300     albertel 1334: 	if ($Apache::lonhomework::scantronmode ||
                   1335: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1.159     albertel 1336: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser);
                   1337: 	}
                   1338:     } elsif ($target eq 'tex') {
1.234     albertel 1339: 	&Apache::lonxml::get_all_text("/postanswerdate",$parser);
1.159     albertel 1340:     }
                   1341:     return '';
1.24      albertel 1342: }
                   1343: 
1.25      albertel 1344: sub end_postanswerdate {
1.159     albertel 1345:     return '';
1.24      albertel 1346: }
                   1347: 
1.25      albertel 1348: sub start_notsolved {
1.159     albertel 1349:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1350:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1351: 	$target eq 'tex') {
                   1352: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1353: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1354: 	if ($gradestatus =~ /^correct/ &&
                   1355: 	    &Apache::response::show_answer()) {
1.159     albertel 1356: 	    &Apache::lonxml::debug("skipping");
                   1357: 	    &Apache::lonxml::get_all_text("/notsolved",$parser);
                   1358: 	}
1.24      albertel 1359:     }
1.159     albertel 1360:     return '';
1.24      albertel 1361: }
                   1362: 
1.25      albertel 1363: sub end_notsolved {
1.159     albertel 1364:     return '';
1.24      albertel 1365: }
                   1366: 
                   1367: sub start_solved {
1.159     albertel 1368:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1369:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1370: 	$target eq 'tex') {
                   1371: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1372: 	if ($gradestatus !~ /^correct/ ||
                   1373: 	    !&Apache::response::show_answer()) {
1.159     albertel 1374: 	    &Apache::lonxml::get_all_text("/solved",$parser);
                   1375: 	}
1.24      albertel 1376:     }
1.159     albertel 1377:     return '';
1.24      albertel 1378: }
                   1379: 
                   1380: sub end_solved {
1.248     albertel 1381:     return '';
                   1382: }
                   1383: 
                   1384: sub start_problemtype {
                   1385:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1386:     my $result;
                   1387:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1388: 	$target eq 'tex' || $target eq 'analyze') {
                   1389: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1390: 	if (!defined($mode)) { $mode='show'; }
                   1391: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1392: 	my $found=0;
                   1393: 	foreach my $type (split(',',$for)) {
                   1394: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1395: 	}
                   1396: 	if ($mode eq 'show' && !$found) {
                   1397: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1398: 	}
                   1399: 	if ($mode eq 'hide' && $found) {
                   1400: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1401: 	}
                   1402:     } elsif ($target eq 'edit') {
                   1403: 	$result .=&Apache::edit::tag_start($target,$token);
                   1404: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1405: 					   [['show','Show'],
                   1406: 					    ['hide','Hide']]
                   1407: 					   ,$token);
                   1408: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1409: 					     [ ['exam','Exam/Quiz Problem'],
                   1410: 					       ['survey','Survey'],
                   1411: 					       ['problem','Homework Problem'] ]
                   1412: 					     ,$token);
                   1413: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1414:     } elsif ($target eq 'modified') {
                   1415: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1416: 						     $safeeval,'mode','for');
                   1417: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1418:     }
                   1419:     return $result;
                   1420: }
                   1421: 
                   1422: sub end_problemtype {
1.159     albertel 1423:     return '';
1.24      albertel 1424: }
1.34      albertel 1425: 
                   1426: sub start_startouttext {
1.159     albertel 1427:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1428:     my @result=(''.'');
                   1429:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1430:     return (@result);
1.34      albertel 1431: }
1.159     albertel 1432: 
1.34      albertel 1433: sub end_startouttext {
1.159     albertel 1434:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1435:     my $result='';
                   1436:     my $text='';
                   1437: 
                   1438:     if ($target eq 'edit') {
                   1439: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser);
1.211     albertel 1440: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1441: <td>".&mt('Delete:').
1.159     albertel 1442:                  &Apache::edit::deletelist($target,$token)
                   1443: 		 ."</td>
1.42      albertel 1444: <td>".
1.159     albertel 1445:                  &Apache::edit::insertlist($target,$token).
                   1446: 		 &Apache::edit::end_row().
                   1447:                  &Apache::edit::start_spanning_row()."\n"
1.188     bowersj2 1448: 		 . &Apache::loncommon::helpLatexCheatsheet () .
1.255     www      1449: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1450:     }
                   1451:     if ($target eq 'modified') {
1.219     albertel 1452: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1453:     }
                   1454:     if ($target eq 'tex') {
                   1455: 	$result .= '\noindent ';
                   1456:     }
                   1457:     return $result;
1.34      albertel 1458: }
1.159     albertel 1459: 
1.34      albertel 1460: sub start_endouttext {
1.159     albertel 1461:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1462:     my $result='';
                   1463:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1464:     if ($target eq "modified") {
                   1465: 	$result='<endouttext />'.
                   1466: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1467:     return $result;
1.34      albertel 1468: }
1.159     albertel 1469: 
1.34      albertel 1470: sub end_endouttext {
1.159     albertel 1471:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1472:     my @result=('','');
                   1473:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1474:     return (@result);
1.34      albertel 1475: }
1.159     albertel 1476: 
1.45      albertel 1477: sub delete_startouttext {
1.159     albertel 1478:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1479:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
                   1480:     my $text=$$parser['-1']->get_text("/endouttext");
                   1481:     my $ntoken=$$parser['-1']->get_token();
                   1482:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1483:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1484:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1485:     # they did the last time round
                   1486:     &Apache::lonxml::increasedepth($ntoken);
                   1487:     &Apache::lonxml::decreasedepth($ntoken);
                   1488:     return 1;
1.193     www      1489: }
                   1490: 
                   1491: sub start_simpleeditbutton {
                   1492:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1493:     my $result='';
1.284     albertel 1494:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 1495: 	($target eq 'web') &&
1.284     albertel 1496:         (&Apache::lonnet::allowed('srm',$env{'request.course.id'}))) {
                   1497:         my $url=$env{'request.noversionuri'};
1.193     www      1498:         $url=~s/\?.*$//;
1.278     albertel 1499: 	my ($symb) = &Apache::lonxml::whichuser();
1.194     www      1500: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.278     albertel 1501:                 '<a href="'.$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      1502: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1503:     }
                   1504:     return $result;
                   1505: }
                   1506: 
                   1507: sub end_simpleeditbutton {
                   1508:     return '';
1.45      albertel 1509: }
1.34      albertel 1510: 
1.1       albertel 1511: 1;
                   1512: __END__

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