Annotation of loncom/homework/structuretags.pm, revision 1.287

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.287   ! albertel    4: # $Id: structuretags.pm,v 1.286 2005/04/18 22:33:38 albertel Exp $
1.74      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.254     www        28: ###
1.54      www        29: 
1.133     sakharuk   30: 
1.1       albertel   31: package Apache::structuretags; 
                     32: 
                     33: use strict;
                     34: use Apache::lonnet;
1.101     sakharuk   35: use Apache::File();
1.147     www        36: use Apache::lonmenu;
1.210     albertel   37: use Apache::lonlocal;
1.231     sakharuk   38: use Apache::lonxml;
1.267     albertel   39: use Time::HiRes qw( gettimeofday tv_interval );
1.78      harris41   40: BEGIN {
1.248     albertel   41:     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startouttext','endouttext','simpleeditbutton','definetag'));
1.10      albertel   42: }
                     43: 
                     44: sub start_web {
1.159     albertel   45:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.200     albertel   46:     my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
                     47:     if ($target eq 'web') {
                     48: 	return $bodytext;
1.159     albertel   49:     }
                     50:     return '';
1.10      albertel   51: }
                     52: 
                     53: sub end_web {
1.44      ng         54:     return '';
1.10      albertel   55: }
                     56: 
                     57: sub start_tex {
1.159     albertel   58:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.198     sakharuk   59:     my $result='';
1.200     albertel   60:     my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
                     61:     if ($target eq 'tex') {
                     62: 	return $bodytext.' ';
1.159     albertel   63:     }
1.198     sakharuk   64:     return $result;;
1.10      albertel   65: }
                     66: 
                     67: sub end_tex {
1.44      ng         68:     return '';
1.9       albertel   69: }
                     70: 
1.48      albertel   71: sub page_start {
1.159     albertel   72:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                     73:     my %found;
1.207     albertel   74:     foreach my $taginside (@$tagstack) {
1.159     albertel   75: 	foreach my $taglookedfor ('html','body','form') {
                     76: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                     77: 	}
                     78:     }
                     79: 
                     80:     my $result;
                     81:     my $head_tag_start;
                     82:     if (!defined($found{'html'})) {
                     83: 	$result=&Apache::londefdef::start_html($target,$token,$tagstack,
                     84: 					       $parstack,$parser,$safeeval);
1.254     www        85: 	$head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target).
1.261     www        86: 	    &Apache::lonhtmlcommon::htmlareaheaders().
1.270     albertel   87: 	    &Apache::lonhtmlcommon::spellheader().
                     88: 	    &Apache::lonxml::fontsettings();     
1.159     albertel   89:     }
                     90:     my $body_tag_start;
1.284     albertel   91:     if (!defined($found{'body'}) && $env{'request.state'} eq 'construct'
                     92: 	&& $env{'environment.remote'} eq 'off') {
1.272     albertel   93: 	$body_tag_start=&Apache::loncommon::bodytag();
1.274     albertel   94: 	$body_tag_start.=&Apache::lonxml::message_location();
1.272     albertel   95:     } elsif (!defined($found{'body'})) {
1.270     albertel   96: 	$body_tag_start='<body onload="'.&Apache::lonmenu::loadevents().'" '.
                     97: 	    'onunload="'.&Apache::lonmenu::unloadevents().'" ';
1.159     albertel   98: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                     99: 						  $safeeval);
1.284     albertel  100: 	if ($env{'browser.imagesuppress'} eq 'on') { $background=''; }
1.159     albertel  101: 	if ($background) {
                    102: 	    $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
                    103: 		$background;
                    104: 	    $body_tag_start.='background="'.$background.'" ';
                    105: 	} else {
                    106: 	    my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    107: 						   $safeeval);
1.284     albertel  108: 	    if (($bgcolor) && ($env{'browser.blackwhite'} ne 'on')) {
1.159     albertel  109: 		$body_tag_start.='bgcolor="'.$bgcolor.'" ';
                    110: 	    } else {
                    111: 		$body_tag_start.='bgcolor="#ffffff"';
                    112: 	    }
1.199     www       113: 	}
1.284     albertel  114: 	if ($env{'browser.fontenhance'} eq 'on') {
1.199     www       115: 	    $body_tag_start.=' style="font-size: x-large;" ';
1.159     albertel  116: 	}
                    117: 	$body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
1.284     albertel  118: 	if ($env{'environment.texengine'} eq 'jsMath') {
1.281     albertel  119: 	    $body_tag_start.='<script type="text/javascript">
                    120:                      function NoFontMessage () {}
                    121:                    </script>'."\n".
                    122: 		       '<script src="/adm/jsMath/jsMath.js"></script>'."\n";
                    123: 	}
1.284     albertel  124: 	if ($target eq 'web' && $env{'request.state'} ne 'construct') {
1.165     albertel  125: 	    my ($symb,undef,undef,undef,$publicuser)=
                    126: 		&Apache::lonxml::whichuser();
                    127: 	    if ($symb eq '' && !$publicuser) {
1.159     albertel  128: 		my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
1.211     albertel  129: 		$help=&mt("Browsing resource, all submissions are temporary.")."<br />";
1.159     albertel  130: 		$body_tag_start.=$help;
                    131: 	    }
                    132: 	}
1.245     albertel  133: 	$body_tag_start.=&Apache::lonxml::message_location();
1.159     albertel  134:     }
                    135:     my $form_tag_start;
                    136:     if (!defined($found{'form'})) {
1.281     albertel  137: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="POST" action="';
1.284     albertel  138: 	my $uri=$env{'request.uri'};
                    139: 	if ($env{'request.enc'}) { $uri=&Apache::lonenc::encrypted($uri); }
1.271     albertel  140: 	$form_tag_start.=$uri.'">';
1.159     albertel  141:     }
                    142:     return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.105     albertel  143: }
                    144: 
1.141     matthew   145: #use Time::HiRes();
1.105     albertel  146: sub get_resource_name {
1.159     albertel  147:     my ($parstack,$safeeval)=@_;
1.204     albertel  148:     if (defined($Apache::lonhomework::name)) {
                    149: 	return $Apache::lonhomework::name;
                    150:     }
1.279     albertel  151:     my ($symb)=&Apache::lonxml::whichuser();
                    152:     my $name=&Apache::lonnet::gettitle($symb);
1.159     albertel  153:     if ($name eq '') {
                    154: 	$name=&Apache::lonnet::EXT('resource.title');
                    155: 	if ($name eq 'con_lost') { $name = ''; }
                    156:     }
1.204     albertel  157:     if ($name!~/\S+/) {
1.284     albertel  158: 	$name=$env{'request.uri'};
1.205     albertel  159: 	$name=~s-.*/([^/]+)$-$1-;
1.204     albertel  160:     }
1.159     albertel  161:     $Apache::lonhomework::name=$name;
                    162:     return $name;
1.105     albertel  163: }
                    164: 
                    165: sub setup_rndseed {
1.159     albertel  166:     my ($safeeval)=@_;
                    167:     my $rndseed;
1.162     albertel  168:     my ($symb)=&Apache::lonxml::whichuser();
1.284     albertel  169:     if ($env{'request.state'} eq "construct" || $symb eq '' ||
1.247     albertel  170:           $Apache::lonhomework::history{'resource.CODE'}) {
1.284     albertel  171: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  172: 	if (!$rndseed) {
1.162     albertel  173: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    174: 	    if (!$rndseed) {
                    175: 		$rndseed=time;
                    176: 	    }
1.284     albertel  177: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  178: 	}
1.284     albertel  179: 	if ($env{'form.resetdata'} eq &mt('New Problem Variation') ||
                    180: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  181: 	    srand(time);
                    182: 	    $rndseed=int(rand(2100000000));
1.284     albertel  183: 	    $env{'form.rndseed'}=$rndseed;
                    184: 	    delete($env{'form.resetdata'});
                    185: 	    delete($env{'form.newrandomization'});
1.159     albertel  186: 	}
1.187     albertel  187: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
                    188: 	   $rndseed=join(',',&Math::Random::random_seed_from_phrase($rndseed));
                    189:         }
1.247     albertel  190:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    191: 	   $rndseed=&Apache::lonnet::rndseed();
                    192: 	}
1.221     albertel  193: 	if ($safeeval) {
                    194: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  195: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  196: 	}
1.159     albertel  197:     }
                    198:     return $rndseed;
1.105     albertel  199: }
                    200: 
1.268     albertel  201: sub remember_problem_state {
                    202:     return '
1.284     albertel  203:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    204:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    205:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  206: }
                    207: 
1.105     albertel  208: sub problem_edit_header {
1.268     albertel  209:     return '<input type="hidden" name="submitted" value="edit" />'.
                    210: 	&Apache::structuretags::remember_problem_state().'
1.210     albertel  211:        <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
1.243     matthew   212:        <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
                    213:        <input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
                    214:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> <hr />
                    215:        <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes and Edit').'" />
                    216:        <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
1.260     albertel  217:        &Apache::loncommon::help_open_menu('','Problem Editing Help','Problem_Editor_XML_Index','',5,'Authoring',undef,undef,undef,'Problem Editing Help')
                    218:        .'</td></tr></table>'.
1.282     albertel  219:        '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  220: }
                    221: 
                    222: sub problem_edit_footer {
1.210     albertel  223:     return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
1.255     www       224:     <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />'.
                    225:     &Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields).
1.280     albertel  226:     "\n</form>\n".&Apache::loncommon::endbodytag()."\n</html>";
1.105     albertel  227: }
                    228: 
1.235     albertel  229: sub option {
                    230:     my ($value,$name) = @_;
                    231:     my $result ="<option value='".$value."' ";
1.284     albertel  232:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  233: 	$result.=" selected='on' ";
                    234:     }
                    235:     $result.='>';
                    236:     return $result;
                    237: }
                    238: 
1.105     albertel  239: sub problem_web_to_edit_header {
1.159     albertel  240:     my ($rndseed)=@_;
1.210     albertel  241:     my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />
1.243     matthew   242:              <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
                    243:              <input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
                    244:              <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    245:              <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
1.210     albertel  246:              <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
1.270     albertel  247:               <input type="text" name="rndseed" size="10" value="'.
1.175     albertel  248: 	       $rndseed.'"
1.270     albertel  249:            onchange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
1.281     albertel  250:              <label><input type="checkbox" name="showallfoils" ';
1.284     albertel  251:     if (defined($env{'form.showallfoils'})) { $result.='checked="on"'; }
1.228     www       252:     $result.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    253: 	&Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
1.281     albertel  254: 	'</label><hr />';
1.235     albertel  255:     $result.="
                    256: <nobr>
                    257: Problem Status:
                    258: <select name='problemstate'>
1.270     albertel  259:   <option value=''></option>
1.235     albertel  260:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    261:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    262:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    263:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    264:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    265: </select>
                    266: </nobr>
                    267: <nobr>
                    268: Problem Type:
                    269: <select name='problemtype'>
1.270     albertel  270:   <option value=''></option>
1.242     albertel  271:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
                    272:   ".&option('problem','problemtype').&mt("Homework problem")."</option>
                    273:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.235     albertel  274: </select>
                    275: </nobr>
                    276: <nobr>
                    277: Feedback Mode:
                    278: <select name='problemstatus'>
                    279:   <option value=''></option>
1.242     albertel  280:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
                    281:   ".&option('no', 'problemstatus').&mt("Don't Show Feedback")."</option>
1.235     albertel  282: </select>
                    283: </nobr>
1.242     albertel  284: <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
1.235     albertel  285: <hr />";
1.284     albertel  286:     my $numtoanalyze=$env{'form.numtoanalyze'};
1.176     albertel  287:     if (!$numtoanalyze) { $numtoanalyze=20; }
1.210     albertel  288:     $result.= '<input type="submit" name="problemmode" value='.
                    289: 	&mt('"Calculate answers').'" /> for
1.136     albertel  290:              <input type="text" name="numtoanalyze" value="'.
1.210     albertel  291: 	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
                    292: 	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
1.176     albertel  293: 						     '',undef,undef,300).
1.210     albertel  294: 						     '<hr />';
1.159     albertel  295:     return $result;
1.48      albertel  296: }
                    297: 
1.65      albertel  298: sub initialize_storage {
1.159     albertel  299:     %Apache::lonhomework::results=();
1.162     albertel  300:     %Apache::lonhomework::history=();
1.159     albertel  301:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.284     albertel  302:     if ($env{'request.state'} eq 'construct' || $symb eq '') {
1.159     albertel  303: 	%Apache::lonhomework::history=
1.284     albertel  304: 	    &Apache::lonnet::tmprestore($env{'request.uri'},'',$domain,$name);
1.159     albertel  305: 	my ($temp)=keys %Apache::lonhomework::history ;
                    306: 	&Apache::lonxml::debug("Return message of $temp");
                    307:     } else {
                    308: 	%Apache::lonhomework::history=
                    309: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    310:     }
                    311:     #ignore error conditions
1.67      albertel  312:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  313:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  314: }
                    315: 
                    316: # -------------------------------------------------------------finalize_storage
                    317: # Stores away the result has to a student's environment
                    318: # checks form.grade_ for specific values, other wises stores
                    319: # to the running users environment
1.285     raeburn   320: # Will increment totals for attempts, students, and corrects
                    321: # if running user has student role.  
1.65      albertel  322: sub finalize_storage {
1.159     albertel  323:     my $result;
                    324:     my ($temp) = keys %Apache::lonhomework::results;
                    325:     if ( $temp ne '' ) {
                    326: 	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.284     albertel  327: 	if ($env{'request.state'} eq 'construct' || $symb eq '') {
                    328: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  329: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.284     albertel  330: 					$env{'request.uri'},'',$domain,$name);
1.159     albertel  331: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    332: 	} else {
                    333: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    334: 					    $symb,$courseid,$domain,$name);
                    335: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   336:             if ($env{'request.role'} =~/^st/) {
                    337:                 &store_aggregates($symb,$courseid);
                    338:             }
1.159     albertel  339: 	}
1.67      albertel  340:     }
1.159     albertel  341:     return $result;
1.65      albertel  342: }
                    343: 
1.285     raeburn   344: # -------------------------------------------------------------store_aggregates
                    345: # Sends hash of values to be incremented in nohist_resourcetracker.db
                    346: # for the course. Increments total number of attempts, unique students 
                    347: # and corrects for each part for an instance of a problem, as appropriate.
                    348: sub store_aggregates {
                    349:     my ($symb,$courseid) = @_;
1.286     albertel  350:     my %aggregate;
                    351:     my @parts;
                    352:     my ($cdomain,$cname) = split(/_/,$courseid);
                    353:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287   ! albertel  354:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  355:             push(@parts, $1);
1.285     raeburn   356:         }
                    357:     }
1.286     albertel  358:     foreach my $part (@parts) {
                    359:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    360: 	    eq 'APPROX_ANS' ||
                    361: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    362: 	    eq 'EXACT_ANS') {
1.287   ! albertel  363:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   364:         }
1.286     albertel  365:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287   ! albertel  366:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.285     raeburn   367:         }
1.287   ! albertel  368:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   369:     }
1.286     albertel  370:     &Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
                    371: 			  $cdomain,$cname); 
1.285     raeburn   372: }
                    373: 
1.65      albertel  374: sub checkout_msg {
1.211     albertel  375:     my %lt=&Apache::lonlocal::texthash( 
                    376: 		'resource'=>'The resource needs to be checked out',
                    377: 		'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.',
                    378:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    379:                 'checkout'=>'Check out Exam for Viewing',
                    380: 		'checkout?'=>'Check out Exam?');
1.159     albertel  381:     return (<<ENDCHECKOUT);
1.211     albertel  382: <h2>$lt{'resource'}</h2>
                    383:     <p>$lt{'id_expln'}</p>
                    384: <font color="red">
                    385: <p>$lt{'warning'}</p>
1.91      albertel  386: </font>
1.284     albertel  387: <form name="checkout" method="POST" action="$env{'request.uri'}">
1.91      albertel  388: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  389: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  390: </form>
                    391: ENDCHECKOUT
                    392: }
                    393: 
1.252     albertel  394: sub firstaccess_msg {
1.253     albertel  395:     my ($time,$symb)=@_;
                    396:     my ($map)=&Apache::lonnet::decode_symb($symb);
                    397:     my $foldertitle=&Apache::lonnet::gettitle($map);
                    398:     &Apache::lonxml::debug("map is $map title is $foldertitle");
1.252     albertel  399:     return (<<ENDCHECKOUT);
1.253     albertel  400: <h2>The resources in "$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  401: <form name="markaccess" method="POST" action="$env{'request.uri'}">
1.252     albertel  402: <input type="hidden" name="markaccess" value="yes" />
                    403: <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
                    404: </form>
                    405: ENDCHECKOUT
                    406: }
                    407: 
1.204     albertel  408: sub init_problem_globals {
                    409:     my ($type)=@_;
                    410:     #initialize globals
                    411:     if ($type eq 'problem') {
                    412: 	$Apache::inputtags::part='0';
                    413: 	@Apache::inputtags::partlist=('0');
1.266     albertel  414: 	$Apache::lonhomework::problemstatus=&get_problem_status('0');
                    415: 	$Apache::lonhomework::ignore_response_errors=0;
                    416:     } elsif ($type eq 'library') {
1.204     albertel  417: 	$Apache::inputtags::part='';
                    418: 	@Apache::inputtags::partlist=();
                    419: 	$Apache::lonhomework::problemstatus='';	
1.266     albertel  420: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  421:     }
                    422:     @Apache::inputtags::responselist = ();
                    423:     @Apache::inputtags::importlist = ();
                    424:     @Apache::inputtags::previous=();
                    425:     @Apache::inputtags::previous_version=();
                    426:     $Apache::structuretags::printanswer='No';
                    427:     @Apache::structuretags::whileconds=();
                    428:     @Apache::structuretags::whilebody=();
                    429:     @Apache::structuretags::whileline=();
                    430:     $Apache::lonhomework::scantronmode=0;
                    431:     undef($Apache::lonhomework::name);
                    432: 
                    433: }
                    434: 
                    435: sub reset_problem_globals {
                    436:     my ($type)=@_;
                    437:     undef(%Apache::lonhomework::history);
                    438:     undef(%Apache::lonhomework::results);
                    439:     undef($Apache::inputtags::part);
1.208     albertel  440: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    441: #detect if we try to do 2 problems in one file
                    442: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  443:     undef($Apache::lonhomework::name);
                    444: }
                    445: 
1.241     albertel  446: sub set_problem_state {
1.240     albertel  447:     my ($part)=@_;
1.284     albertel  448:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  449: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    450: 	    'correct_by_student';
                    451:     }
                    452: }
                    453: 
1.241     albertel  454: sub get_problem_status {
                    455:     my ($part)=@_;
1.267     albertel  456:     my $problem_status;
1.284     albertel  457:     if ($env{'request.state'} eq 'construct' &&
                    458: 	defined($env{'form.problemstatus'})) {
                    459: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  460:     } else {
                    461: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    462: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  463: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  464:     }
                    465:     return $problem_status;
                    466: }
                    467: 
1.9       albertel  468: sub start_problem {
1.159     albertel  469:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19      albertel  470: 
1.184     albertel  471:     if ( $Apache::inputtags::part ne '' ||
                    472: 	 $Apache::lonhomework::parsing_a_problem) {
                    473: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
                    474: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
1.159     albertel  475: 	return '';
                    476:     }
1.184     albertel  477: 
                    478:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  479:     &init_problem_globals('problem');
1.166     albertel  480: 
1.284     albertel  481:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  482: 	$Apache::lonhomework::scantronmode=1;
                    483:     }
1.161     albertel  484: 
1.246     albertel  485:     &initialize_storage();
1.159     albertel  486:     if ($target ne 'analyze') {
                    487: 	if ($target eq 'web') {
                    488: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
1.238     albertel  489: 	}
1.284     albertel  490:        	if ($env{'request.state'} eq 'construct') { &set_problem_state('0'); }
1.159     albertel  491: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.284     albertel  492: 	if (($env{'request.state'} eq 'construct') &&
                    493: 	    defined($env{'form.problemtype'})) {
                    494: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  495: 	}
1.240     albertel  496: 	&Apache::lonxml::debug("Found this to be of type :$Apache::ltonhomework::type:");
1.159     albertel  497:     }
1.164     albertel  498:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  499: 	my $uri=$env{'request.uri'};
1.159     albertel  500: 	if ($uri=~/\.(\w+)$/) {
                    501: 	    $Apache::lonhomework::type=$1;
                    502: 	    &Apache::lonxml::debug("Using type of $1");
                    503: 	} else {
                    504: 	    $Apache::lonhomework::type='problem';
                    505: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    506: 	}
1.87      albertel  507:     }
1.58      www       508: 
1.159     albertel  509:     #added vars to the scripting enviroment
1.213     albertel  510:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  511:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  512:     &Apache::run::run($expression,$safeeval);
1.159     albertel  513:     my $status;
                    514:     my $accessmsg;
                    515: 
                    516:     #should get back a <html> or the neccesary stuff to start XML/MathML
                    517:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    518: 	&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
1.284     albertel  519:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  520: 
                    521:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    522:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    523: 	$target eq 'tex') {
                    524: 	#handle exam checkout
                    525: 	if ($Apache::lonhomework::type eq 'exam') {
                    526: 	    my $token=
                    527: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  528: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  529: 		$token=&Apache::lonxml::maketoken();
                    530: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    531: 		    $token;
                    532: 	    }
                    533: 	    $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  534: 	}
1.284     albertel  535: 	if ($env{'form.markaccess'}) {
1.252     albertel  536: 	    &Apache::lonnet::set_first_access('map');
                    537: 	}
1.159     albertel  538: 	#handle rand seed in construction space
                    539: 	my $rndseed=&setup_rndseed($safeeval);
1.162     albertel  540: 	my ($symb)=&Apache::lonxml::whichuser();
1.284     albertel  541: 	if ($env{'request.state'} ne "construct" && $symb eq '') {
1.162     albertel  542: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    543: 		$rndseed.'" />'.
                    544: 		    '<input type="submit" name="resetdata"
1.211     albertel  545:                              value="'.&mt('New Problem Variation').'" />'.
1.164     albertel  546: 		    '<input type="hidden" name="username"
1.284     albertel  547:                              value="'.$env{'form.username'}.'" />';
                    548: 	    if ($env{'user.adv'}) {
1.267     albertel  549: 		$form_tag_start.=
                    550: 		    ' <input type="checkbox" name="showallfoils" ';
1.284     albertel  551: 		if (defined($env{'form.showallfoils'})) {
1.267     albertel  552: 		    $form_tag_start.='checked="on"';
                    553: 		}
                    554: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils');
                    555: 	    }
                    556: 	    $form_tag_start.='<hr />';
1.162     albertel  557: 	}
1.159     albertel  558: 	($status,$accessmsg) = &Apache::lonhomework::check_access('0');
                    559: 	push (@Apache::inputtags::status,$status);
                    560: 	my $expression='$external::datestatus="'.$status.'";';
                    561: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    562: 	&Apache::run::run($expression,$safeeval);
                    563: 	&Apache::lonxml::debug("Got $status");
                    564: 	if (( $status eq 'CLOSED' ) ||
                    565: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  566: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  567: 	    ( $status eq 'BANNED') ||
1.216     albertel  568: 	    ( $status eq 'UNAVAILABLE') ||
                    569: 	    ( $status eq 'INVALID_ACCESS')) {
1.159     albertel  570: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
                    571: 	    if ( $target eq "web" ) {
                    572: 		$result.= $head_tag_start.'</head>';
                    573: 		my $msg=$body_tag_start;
                    574: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  575: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  576: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  577: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  578: 		}
1.216     albertel  579: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.159     albertel  580: 		    $msg.='The problem '.$accessmsg;
                    581: 		} elsif ($status eq 'UNCHECKEDOUT') {
                    582: 		    $msg.=&checkout_msg;
1.252     albertel  583: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  584: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.159     albertel  585: 		}
                    586: 		$result.=$msg.'<br />';
                    587: 	    } elsif ($target eq 'tex') {
                    588: 		$result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
                    589: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  590: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  591: 		} else {
1.211     albertel  592: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  593: 		}
                    594: 	    }
                    595: 	} elsif ($target eq 'web') {
                    596: 	    my $name= &get_resource_name($parstack,$safeeval);
1.227     albertel  597: 	    $result.="$head_tag_start<title>$name</title></head>
1.158     sakharuk  598:               $body_tag_start \n $form_tag_start".	
1.227     albertel  599: 	      '<input type="hidden" name="submitted" value="yes" />';
                    600: 	    # create a page header and exit
1.284     albertel  601: 	    if ($env{'request.state'} eq "construct") {
                    602: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.227     albertel  603: 	    }
                    604: 	    # if we are viewing someone else preserve that info
1.284     albertel  605: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel  606: 		foreach my $field ('symb','courseid','domain','username') {
                    607: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel  608: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel  609: 		}
                    610: 	    }
                    611: 	} elsif ($target eq 'tex') {
1.192     sakharuk  612: 	    my $startminipage = '';
1.284     albertel  613: 	    if (not $env{'form.problem_split'}=~/yes/) {
1.192     sakharuk  614: 		$startminipage = '\begin{minipage}{\textwidth}';
1.178     sakharuk  615: 	    }
1.159     albertel  616: 	    my $id = $Apache::inputtags::part;
                    617: 	    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel  618: 	    my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.223     sakharuk  619: 	    my @packages = split /,/,$packages;
                    620: 	    my $allow_print_points = 0;
                    621: 	    foreach my $partial_key (@packages) {
1.230     albertel  622: 		if ($partial_key=~m/^part_0$/) {
1.223     sakharuk  623: 		    $allow_print_points=1;
1.159     albertel  624: 		}
                    625: 	    }
1.276     albertel  626: 	    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    627: 	    if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
1.159     albertel  628: 	    my $duedate = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    629: 	    $duedate = POSIX::strftime("%c",localtime($duedate));
                    630: 	    my $temp_file;
1.284     albertel  631: 	    my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
1.159     albertel  632: 	    if (-e $filename) {
                    633: 		$temp_file = Apache::File->new($filename);
                    634: 	    } else {
                    635: 		$temp_file = Apache::File->new('>>'.$filename);
                    636: 	    }
                    637: 	    my @due_file_content = <$temp_file>;
                    638: 	    my $due_file_content = $due_file_content[$#due_file_content];
                    639: 	    chomp $due_file_content;
1.257     sakharuk  640: 	    my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
1.159     albertel  641: 	    if ($due_file_content ne $duedate) {
                    642: 		$temp_file = Apache::File->new('>'.$filename);
                    643: 		print $temp_file "$duedate\n";
1.284     albertel  644: 		if (not $env{'request.symb'} =~ m/\.page_/) {
1.159     albertel  645: 		    if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
1.284     albertel  646: 			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent\textit{Due date: '.$duedate.'} \vskip 1 mm\noindent '.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';	
1.159     albertel  647: 		    } else {
1.284     albertel  648: 			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm \noindent'.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
1.159     albertel  649: 			if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    650: 		    }
1.104     sakharuk  651: 		} else {
1.159     albertel  652: 		    $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
1.104     sakharuk  653: 		}
1.101     sakharuk  654: 	    } else {
1.284     albertel  655: 		if (not $env{'request.symb'} =~ m/\.page_/) {
                    656: 		    $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent \vskip 1 mm\noindent'.$startminipage.'\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';	
1.159     albertel  657: 		    if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    658: 		} else {
                    659: 		    $result .= '\vskip 1mm \\\\\\\\';
                    660: 		}
                    661: 	    }
1.99      sakharuk  662: 	}
1.159     albertel  663:     } elsif ($target eq 'edit') {
                    664: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    665: 	    &problem_edit_header();
1.226     albertel  666: 	$Apache::lonxml::warnings_error_header=
                    667: 	    &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  668: 	my $temp=&Apache::edit::insertlist($target,$token);
                    669: 	$result.=$temp;
                    670:     } elsif ($target eq 'modified') {
                    671: 	$result=$token->[4];
                    672: 	$result.=&Apache::edit::handle_insert();
                    673:     } else {
                    674: 	# page_start returned a starting result, delete it if we don't need it
                    675: 	$result = '';
1.99      sakharuk  676:     }
1.159     albertel  677:     return $result;
1.9       albertel  678: }
                    679: 
                    680: sub end_problem {
1.159     albertel  681:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    682:     my $result='';
                    683:     my $status=$Apache::inputtags::status['-1'];
                    684:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    685: 	$target eq 'tex') {
1.249     albertel  686: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel  687: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel  688: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                    689: 		&Apache::inputtags::grade;
                    690: 	    } else {
                    691: 		# move any submission data to .hidden
                    692: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                    693: 	    }
1.159     albertel  694: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    695: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel  696: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel  697: 	    # if part is zero, no <part>s existed, so we need show the current
                    698: 	    # grading status
                    699: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    700: 	    $result.= $gradestatus;
                    701: 	}
                    702: 	if (
1.284     albertel  703: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel  704: 	    ($target eq 'answer') || ($target eq 'tex')
                    705: 	   ) {
1.227     albertel  706: 	    if ($target ne 'tex' &&
1.284     albertel  707: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www       708: 		$result.="</form>";
                    709: 		$result.=&Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields);
1.159     albertel  710: 	    }
                    711: 	    if ($target eq 'web') {
1.281     albertel  712: 		$result.=&Apache::lonxml::xmlend().'</html>';
1.159     albertel  713: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  714: 		my $endminipage = '';
1.284     albertel  715: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk  716: 		    $endminipage = '\end{minipage}';
                    717: 		}
1.284     albertel  718:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk  719: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.257     sakharuk  720: 		    $result=~s/<\/html>//;
1.159     albertel  721: 		} else {
1.262     sakharuk  722: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel  723: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk  724: 			$result .= $endminipage.'\end{document} ';
                    725: 		    } else {
                    726: 			$result .= '';
                    727: 		    }
1.159     albertel  728: 		}
                    729: 	    }
                    730: 	}
                    731: 	if ($target eq 'grade') {
                    732: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    733: 	    &finalize_storage();
                    734: 	}
1.284     albertel  735: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                    736: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.172     albertel  737: 	    $result.='</html>'; # normally we get it from xmlend, but in CSTR
                    738: 	                        # we always show answer mode too.
1.159     albertel  739: 	}
                    740:     } elsif ($target eq 'meta') {
                    741: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  742: 	    @Apache::inputtags::response=();
1.159     albertel  743: 	    $result=&Apache::response::mandatory_part_meta;
                    744: 	}
1.215     albertel  745: 	$result.=&Apache::response::meta_part_order();
1.258     albertel  746: 	$result.=&Apache::response::meta_response_order();
1.159     albertel  747:     } elsif ($target eq 'edit') {
                    748: 	&Apache::lonxml::debug("in end_problem with $target, edit");
                    749: 	$result = &problem_edit_footer();
                    750:     }
1.155     albertel  751: 
1.284     albertel  752:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel  753: 	&Apache::inputtags::check_for_duplicate_ids();
                    754:     }
1.204     albertel  755: 
                    756:     &reset_problem_globals('problem');
1.159     albertel  757: 
                    758:     return $result;
1.48      albertel  759: }
                    760: 
1.108     albertel  761: 
1.48      albertel  762: sub start_library {
1.159     albertel  763:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    764:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.244     albertel  765:     if ($$tagstack[0] eq 'library') {
                    766: 	&init_problem_globals('library');
                    767: 	$Apache::lonhomework::type='problem';
                    768:     }
1.159     albertel  769:     if ($target eq 'edit') {
                    770: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    771: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    772: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    773: 	    &problem_edit_header();
                    774: 	my $temp=&Apache::edit::insertlist($target,$token);
                    775: 	$result.=$temp;
                    776:     } elsif ($target eq 'modified') {
                    777: 	$result=$token->[4];
                    778: 	$result.=&Apache::edit::handle_insert();
                    779:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel  780: 	     $env{'request.state'} eq "construct" ) {
1.159     albertel  781: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    782: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    783: 	my $name=&get_resource_name($parstack,$safeeval);
                    784: 	my $rndseed=&setup_rndseed($safeeval);
                    785: 	$result.="$head_tag_start<title>$name</title></head>
1.105     albertel  786:               $body_tag_start \n $form_tag_start".	
1.159     albertel  787: 		  '<input type="hidden" name="submitted" value="yes" />';
                    788: 	$result.=&problem_web_to_edit_header($rndseed);
                    789:     }
                    790:     return $result;
1.48      albertel  791: }
                    792: 
                    793: sub end_library {
1.159     albertel  794:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    795:     my $result='';
                    796:     if ($target eq 'edit') {
                    797: 	$result=&problem_edit_footer();
                    798:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel  799: 	     $env{'request.state'} eq "construct") {
1.280     albertel  800: 	$result.='</form>'.&Apache::loncommon::endbodytag().
                    801: 	    &Apache::lonxml::xmlend();
1.159     albertel  802:     }
1.204     albertel  803:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel  804:     return $result;
1.197     www       805: }
                    806: 
                    807: sub start_definetag {
                    808:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    809: 
                    810:     my $result;
                    811: 
                    812:     my $name = $token->[2]->{'name'};
                    813:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
                    814:     if ($name=~/^\//) {
                    815: 	$result=
                    816:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                    817:     } else {
                    818: 	$result=
                    819:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                    820:     }
                    821:     $skip=~s/\</\&lt\;/gs;
                    822:     $skip=~s/\>/\&gt\;/gs;
                    823:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                    824:     return $result;
                    825: }
                    826: 
                    827: sub end_definetag {
                    828:     return '';
1.1       albertel  829: }
                    830: 
                    831: sub start_block {
1.201     albertel  832:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel  833: 
                    834:     my $result;
1.1       albertel  835: 
1.160     albertel  836:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.131     albertel  837: 	$target eq 'tex' || $target eq 'analyze') {
1.159     albertel  838: 	my $code = $token->[2]->{'condition'};
1.201     albertel  839: 	if (defined($code)) {
1.137     albertel  840: 	    if (!$Apache::lonxml::default_homework_loaded) {
                    841: 		&Apache::lonxml::default_homework_load($safeeval);
                    842: 	    }
1.131     albertel  843: 	    $result = &Apache::run::run($code,$safeeval);
                    844: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                    845: 	} else {
                    846: 	    $result='1';
                    847: 	}
                    848: 	if ( ! $result ) {
1.201     albertel  849: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel  850: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    851: 	}
                    852: 	$result='';
                    853:     } elsif ($target eq 'edit') {
                    854: 	$result .=&Apache::edit::tag_start($target,$token);
                    855: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                    856: 					  $token,40);
                    857: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    858:     } elsif ($target eq 'modified') {
                    859: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    860: 						     $safeeval,'condition');
                    861: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel  862:     }
1.131     albertel  863:     return $result;
1.1       albertel  864: }
                    865: 
                    866: sub end_block {
1.167     www       867:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    868:     my $result;
                    869:     if ($target eq "edit") {
                    870: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    871:     }
                    872:     return $result;
                    873: }
                    874: 
                    875: sub start_languageblock {
1.201     albertel  876:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www       877: 
                    878:     my $result;
                    879: 
                    880:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    881: 	$target eq 'tex' || $target eq 'analyze') {
1.201     albertel  882: 	my $include = $token->[2]->{'include'};
                    883: 	my $exclude = $token->[2]->{'exclude'};
                    884:         my %languages=&Apache::loncommon::display_languages();
                    885:         $result='1';
                    886: 	if ($include) {
                    887:             $result='';
                    888:             foreach (split(/\,/,$include)) {
                    889:                 if ($languages{$_}) { $result='1'; }
                    890:             }
                    891: 	}
                    892:         if ($exclude) {
                    893:             foreach (split(/\,/,$exclude)) {
                    894:                 if ($languages{$_}) { $result='0'; }
                    895:             }
                    896: 	}
                    897: 	if ( ! $result ) {
                    898: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                    899: 						   $style);
                    900: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    901: 	}
                    902: 	$result='';
1.167     www       903:     } elsif ($target eq 'edit') {
                    904: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel  905: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www       906: 					  $token,40);
1.211     albertel  907: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www       908: 					  $token,40);
                    909: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    910:     } elsif ($target eq 'modified') {
                    911: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel  912: 						     $safeeval,'include',
                    913: 						     'exclude');
1.167     www       914: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                    915:     }
                    916:     return $result;
                    917: }
                    918: 
                    919: sub end_languageblock {
1.170     www       920:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    921:     my $result;
1.201     albertel  922:     if ($target eq "edit") {
1.170     www       923: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    924:     }
                    925:     return $result;
                    926: }
                    927: 
                    928: sub start_instructorcomment {
1.201     albertel  929:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www       930: 
                    931:     my $result;
                    932: 
                    933:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    934: 	$target eq 'tex' || $target eq 'analyze') {
1.284     albertel  935:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                    936: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel  937: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                    938: 						   $parser,$style);
1.170     www       939: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    940: 	}
                    941: 	$result='';
                    942:     } elsif ($target eq 'edit') {
                    943: 	$result .=&Apache::edit::tag_start($target,$token);
                    944: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    945:     }
                    946:     return $result;
                    947: }
                    948: 
                    949: sub end_instructorcomment {
1.159     albertel  950:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel  951:     my $result;
                    952:     if ($target eq "edit") {
                    953: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    954:     }
                    955:     return $result;
1.4       tsai      956: }
                    957: 
                    958: sub start_while {
1.159     albertel  959:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    960: 
1.160     albertel  961:     my $result;
1.161     albertel  962:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.160     albertel  963: 	$target eq 'tex' || $target eq 'analyze') {
                    964: 	my $code = $token->[2]->{'condition'};
1.4       tsai      965: 
1.160     albertel  966: 	push( @Apache::structuretags::whileconds, $code);
                    967: 	if (!$Apache::lonxml::default_homework_loaded) {
                    968: 	    &Apache::lonxml::default_homework_load($safeeval);
                    969: 	}
                    970: 	my $result = &Apache::run::run($code,$safeeval);
1.161     albertel  971: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
1.160     albertel  972: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel  973: 	push( @Apache::structuretags::whileline, $token->[5]);
                    974: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel  975: 	if ( $result ) {
                    976: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                    977: 	}
                    978:     } elsif ($target eq 'edit') {
                    979: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel  980: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel  981: 					  $token,40);
                    982: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    983:     } elsif ($target eq 'modified') {
                    984: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    985: 						     $safeeval,'condition');
                    986: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel  987:     }
1.160     albertel  988:     return $result;
1.4       tsai      989: }
                    990: 
                    991: sub end_while {
1.159     albertel  992:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel  993:     my $result;
                    994: 
                    995:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    996: 	$target eq 'tex' || $target eq 'analyze') {
                    997: 	my $code = pop(@Apache::structuretags::whileconds);
                    998: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel  999: 	my $line = pop(@Apache::structuretags::whileline);
                   1000: 	my $return = &Apache::run::run($code,$safeeval);
                   1001: 	my $starttime=time;
                   1002: 	my $error=0;
                   1003: 	while ($return) {
                   1004: 	    if (time-$starttime >
                   1005: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.270     albertel 1006: 		#$return = 0; $error=1; next;
1.161     albertel 1007: 	    }
                   1008: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                   1009: 	    $return = &Apache::run::run($code,$safeeval);
                   1010: 	}
                   1011: 	if ($error) {
1.270     albertel 1012: 	    &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 1013: 	}
                   1014:     } elsif ($target eq "edit") {
                   1015: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1016:     }
1.160     albertel 1017:     return $result;
1.1       albertel 1018: }
1.6       tsai     1019: 
1.160     albertel 1020: # <randomlist show="1">
1.6       tsai     1021: #  <tag1>..</tag1>
                   1022: #  <tag2>..</tag2>
                   1023: #  <tag3>..</tag3>
1.160     albertel 1024: #  ...
1.6       tsai     1025: # </randomlist>
                   1026: sub start_randomlist {
1.159     albertel 1027:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1028:     my $result;
                   1029:     if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
                   1030: 	$target eq 'tex' || $target eq 'analyze') {
                   1031: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
                   1032: 	my $b_parser= HTML::TokeParser->new(\$body);
                   1033: 	my $b_tok;
                   1034: 	my @randomlist;
                   1035: 	my $list_item;
                   1036: 	while($b_tok = $b_parser->get_token() ) {
                   1037: 	    if($b_tok->[0] eq 'S') { # start tag
                   1038: 		# get content of the tag until matching end tag
                   1039: 		# get all text upto the matching tag
                   1040: 		# and push the content into @randomlist
                   1041: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1042: 							   $b_parser);
                   1043: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1044: 		push(@randomlist,$list_item);
                   1045: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1046:                 #         $list_item</b>";
                   1047: 	    }
                   1048: 	    if($b_tok->[0] eq 'T') { # text
                   1049: 		# what to do with text in between tags?
                   1050: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1051: 	    }
                   1052: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1053: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1054: 	    # }
                   1055: 	}
                   1056: 	my @idx_arr = (0 .. $#randomlist);
                   1057: 	&Apache::structuretags::shuffle(\@idx_arr);
                   1058: 	my $bodytext = '';
                   1059: 	my $show=$#randomlist;
                   1060: 	my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1061: 	$showarg--;
                   1062: 	if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                   1063: 	for(0 .. $show) {
                   1064: 	    $bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1065: 	}
                   1066: 	&Apache::lonxml::newparser($parser,\$bodytext);
                   1067:     } elsif ($target eq 'edit' ) {
                   1068: 	$result .=&Apache::edit::tag_start($target,$token);
                   1069: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1070: 					   $token,5);
                   1071: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1072:     } elsif ($target eq 'modified' ) {
                   1073: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1074: 						     $safeeval,'show');
                   1075: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1076:     }
                   1077:     return $result;
1.7       tsai     1078: }
                   1079: 
                   1080: sub shuffle {
                   1081:     my $a=shift;
                   1082:     my $i;
1.70      albertel 1083:     if (defined(@$a)) {
1.251     albertel 1084: 	&Apache::response::pushrandomnumber();
1.159     albertel 1085: 	for($i=@$a;--$i;) {
                   1086: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1087: 	    next if $i == $j;
                   1088: 	    @$a[$i,$j] = @$a[$j,$i];
                   1089: 	}
1.251     albertel 1090: 	&Apache::response::poprandomnumber();
1.7       tsai     1091:     }
1.6       tsai     1092: }
                   1093: 
                   1094: sub end_randomlist {
1.159     albertel 1095:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1096:     my $result;
                   1097:     if ($target eq 'edit' ) {
                   1098: 	$result=&Apache::edit::tag_end($target,$token,
                   1099: 				       'End Randomly Parsed Block');
                   1100:     }
                   1101:     return $result;
1.6       tsai     1102: }
                   1103: 
1.283     albertel 1104: sub ordered_show_check {
                   1105:     my $last_part=$Apache::inputtags::partlist[-2];
                   1106:     my $in_order=
                   1107: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1108:     my $in_order_show=1;
                   1109:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1110: 	$in_order_show=&Apache::response::check_status($last_part);
                   1111:     }
                   1112:     return $in_order_show;
                   1113: }
                   1114: 
1.11      albertel 1115: sub start_part {
1.159     albertel 1116:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1117:     my $result='';
                   1118:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
                   1119:     if ($id eq '') { $id = $Apache::lonxml::curdepth; }
                   1120:     $Apache::inputtags::part=$id;
1.177     albertel 1121:     push(@Apache::inputtags::partlist,$id);
                   1122:     @Apache::inputtags::response=();
1.159     albertel 1123:     @Apache::inputtags::previous=();
                   1124:     @Apache::inputtags::previous_version=();
1.241     albertel 1125:     $Apache::lonhomework::problemstatus=&get_problem_status($id);
1.159     albertel 1126:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1127:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1128:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1129:     my $in_order_show=&ordered_show_check();
1.214     albertel 1130:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1131:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1132:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1133: 
                   1134:     if ($target eq 'meta') {
1.224     www      1135: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1136: 	return &Apache::response::mandatory_part_meta.
                   1137: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1138:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1139: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1140: 	if ($hidden || !$in_order_show) {
1.159     albertel 1141: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1142: 	} else {
                   1143: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1144: 	    push (@Apache::inputtags::status,$status);
                   1145: 	    my $expression='$external::datestatus="'.$status.'";';
                   1146: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1147: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1148: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1149: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1150: 	    }
1.216     albertel 1151: 	    if (( $status eq 'CLOSED' ) ||
                   1152: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1153: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1154: 		( $status eq 'BANNED') ||
                   1155: 		( $status eq 'UNAVAILABLE') ||
                   1156: 		( $status eq 'INVALID_ACCESS')) {
1.159     albertel 1157: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1158: 		if ( $target eq "web" ) {
1.211     albertel 1159: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1160: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1161: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1162: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1163: 		    } else {
1.211     albertel 1164: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1165: 		    }
1.159     albertel 1166: 		}
                   1167: 	    } else {
                   1168: 		if ($target eq 'tex') {
1.284     albertel 1169: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1170: 			if ($$tagstack[-2] eq 'td') {
                   1171: 			    $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1172: 			} else {
                   1173: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1174: 			}
1.195     sakharuk 1175: 		    }
1.159     albertel 1176: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1177: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1178: 		    my @allkeys = split /,/,$allkeys;
                   1179: 		    my $allow_print_points = 0;
                   1180: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1181: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1182: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1183: 			}
                   1184: 		    }
1.275     albertel 1185: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1186: 		    if (defined($maxtries) && $maxtries < 0) {
                   1187: 			$allow_print_points=0;
                   1188: 		    }
1.222     sakharuk 1189: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1190: 		} elsif ($target eq 'web') {
                   1191: 		    $result.='<a name="'.&Apache::lonnet::escape($Apache::inputtags::part).'" />';
1.159     albertel 1192: 		}
                   1193: 	    }
                   1194: 	}
                   1195:     } elsif ($target eq 'edit') {
                   1196: 	$result.=&Apache::edit::tag_start($target,$token);
                   1197: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1198: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1199: 	    '&nbsp;&nbsp;'.
                   1200: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1201: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1202:     } elsif ($target eq 'modified') {
                   1203: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1204: 						     $safeeval,'id','display');
1.159     albertel 1205: 	if ($constructtag) {
1.225     albertel 1206: 	    #limiting ids to only letters numbers, and space
1.224     www      1207: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1208: 	    $result = &Apache::edit::rebuild_tag($token);
                   1209: 	    $result.=&Apache::edit::handle_insert();
                   1210: 	}
                   1211:     }
                   1212:     return $result;
1.11      albertel 1213: }
                   1214: 
                   1215: sub end_part {
1.159     albertel 1216:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1217:     &Apache::lonxml::debug("in end_part $target ");
                   1218:     my $status=$Apache::inputtags::status['-1'];
                   1219:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1220:     my $in_order_show=&ordered_show_check();
1.159     albertel 1221:     my $result='';
                   1222:     if ( $target eq 'meta' ) {
                   1223: 	$result='';
1.249     albertel 1224:     } elsif ($target eq 'grade') {
                   1225: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1226: 	    !$hidden && $in_order_show) {
1.249     albertel 1227: 	    $result=&Apache::inputtags::grade;
                   1228: 	} else {
                   1229: 	    # move any submission data to .hidden
                   1230: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1231: 	}
1.283     albertel 1232:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1233: 	     !$hidden && $in_order_show) {
1.159     albertel 1234: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1235: 							$target);
1.212     albertel 1236: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1237: 	    $gradestatus='';
                   1238: 	}
1.159     albertel 1239: 	$result=$gradestatus;
1.265     sakharuk 1240: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1241:     } elsif ($target eq 'edit') {
                   1242: 	$result=&Apache::edit::end_table();
1.159     albertel 1243:     }
                   1244:     pop @Apache::inputtags::status;
                   1245:     $Apache::inputtags::part='';
                   1246:     return $result;
1.11      albertel 1247: }
1.1       albertel 1248: 
1.25      albertel 1249: sub start_preduedate {
1.159     albertel 1250:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1251:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
1.236     albertel 1252: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.159     albertel 1253: 	if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1254: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1255: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.159     albertel 1256: 	    &Apache::lonxml::get_all_text("/preduedate",$parser);
                   1257: 	}
1.24      albertel 1258:     }
1.159     albertel 1259:     return '';
1.24      albertel 1260: }
                   1261: 
1.25      albertel 1262: sub end_preduedate {
1.159     albertel 1263:     return '';
1.24      albertel 1264: }
                   1265: 
1.25      albertel 1266: sub start_postanswerdate {
1.159     albertel 1267:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.234     albertel 1268:     if ($target eq 'web' || $target eq 'grade') {
1.159     albertel 1269: 	if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
                   1270: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser);
                   1271: 	}
                   1272:     } elsif ($target eq 'tex') {
1.234     albertel 1273: 	&Apache::lonxml::get_all_text("/postanswerdate",$parser);
1.159     albertel 1274:     }
                   1275:     return '';
1.24      albertel 1276: }
                   1277: 
1.25      albertel 1278: sub end_postanswerdate {
1.159     albertel 1279:     return '';
1.24      albertel 1280: }
                   1281: 
1.25      albertel 1282: sub start_notsolved {
1.159     albertel 1283:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1284:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1285: 	$target eq 'tex') {
                   1286: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1287: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1288: 	if ($gradestatus =~ /^correct/ &&
                   1289: 	    &Apache::response::show_answer()) {
1.159     albertel 1290: 	    &Apache::lonxml::debug("skipping");
                   1291: 	    &Apache::lonxml::get_all_text("/notsolved",$parser);
                   1292: 	}
1.24      albertel 1293:     }
1.159     albertel 1294:     return '';
1.24      albertel 1295: }
                   1296: 
1.25      albertel 1297: sub end_notsolved {
1.159     albertel 1298:     return '';
1.24      albertel 1299: }
                   1300: 
                   1301: sub start_solved {
1.159     albertel 1302:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1303:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1304: 	$target eq 'tex') {
                   1305: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1306: 	if ($gradestatus !~ /^correct/ ||
                   1307: 	    !&Apache::response::show_answer()) {
1.159     albertel 1308: 	    &Apache::lonxml::get_all_text("/solved",$parser);
                   1309: 	}
1.24      albertel 1310:     }
1.159     albertel 1311:     return '';
1.24      albertel 1312: }
                   1313: 
                   1314: sub end_solved {
1.248     albertel 1315:     return '';
                   1316: }
                   1317: 
                   1318: sub start_problemtype {
                   1319:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1320:     my $result;
                   1321:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1322: 	$target eq 'tex' || $target eq 'analyze') {
                   1323: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1324: 	if (!defined($mode)) { $mode='show'; }
                   1325: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1326: 	my $found=0;
                   1327: 	foreach my $type (split(',',$for)) {
                   1328: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1329: 	}
                   1330: 	if ($mode eq 'show' && !$found) {
                   1331: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1332: 	}
                   1333: 	if ($mode eq 'hide' && $found) {
                   1334: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1335: 	}
                   1336:     } elsif ($target eq 'edit') {
                   1337: 	$result .=&Apache::edit::tag_start($target,$token);
                   1338: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1339: 					   [['show','Show'],
                   1340: 					    ['hide','Hide']]
                   1341: 					   ,$token);
                   1342: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1343: 					     [ ['exam','Exam/Quiz Problem'],
                   1344: 					       ['survey','Survey'],
                   1345: 					       ['problem','Homework Problem'] ]
                   1346: 					     ,$token);
                   1347: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1348:     } elsif ($target eq 'modified') {
                   1349: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1350: 						     $safeeval,'mode','for');
                   1351: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1352:     }
                   1353:     return $result;
                   1354: }
                   1355: 
                   1356: sub end_problemtype {
1.159     albertel 1357:     return '';
1.24      albertel 1358: }
1.34      albertel 1359: 
                   1360: sub start_startouttext {
1.159     albertel 1361:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1362:     my @result=(''.'');
                   1363:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1364:     return (@result);
1.34      albertel 1365: }
1.159     albertel 1366: 
1.34      albertel 1367: sub end_startouttext {
1.159     albertel 1368:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1369:     my $result='';
                   1370:     my $text='';
                   1371: 
                   1372:     if ($target eq 'edit') {
                   1373: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser);
1.211     albertel 1374: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1375: <td>".&mt('Delete:').
1.159     albertel 1376:                  &Apache::edit::deletelist($target,$token)
                   1377: 		 ."</td>
1.42      albertel 1378: <td>".
1.159     albertel 1379:                  &Apache::edit::insertlist($target,$token).
                   1380: 		 &Apache::edit::end_row().
                   1381:                  &Apache::edit::start_spanning_row()."\n"
1.188     bowersj2 1382: 		 . &Apache::loncommon::helpLatexCheatsheet () .
1.255     www      1383: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1384:     }
                   1385:     if ($target eq 'modified') {
1.219     albertel 1386: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1387:     }
                   1388:     if ($target eq 'tex') {
                   1389: 	$result .= '\noindent ';
                   1390:     }
                   1391:     return $result;
1.34      albertel 1392: }
1.159     albertel 1393: 
1.34      albertel 1394: sub start_endouttext {
1.159     albertel 1395:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1396:     my $result='';
                   1397:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1398:     if ($target eq "modified") {
                   1399: 	$result='<endouttext />'.
                   1400: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1401:     return $result;
1.34      albertel 1402: }
1.159     albertel 1403: 
1.34      albertel 1404: sub end_endouttext {
1.159     albertel 1405:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1406:     my @result=('','');
                   1407:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1408:     return (@result);
1.34      albertel 1409: }
1.159     albertel 1410: 
1.45      albertel 1411: sub delete_startouttext {
1.159     albertel 1412:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1413:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
                   1414:     my $text=$$parser['-1']->get_text("/endouttext");
                   1415:     my $ntoken=$$parser['-1']->get_token();
                   1416:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1417:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1418:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1419:     # they did the last time round
                   1420:     &Apache::lonxml::increasedepth($ntoken);
                   1421:     &Apache::lonxml::decreasedepth($ntoken);
                   1422:     return 1;
1.193     www      1423: }
                   1424: 
                   1425: sub start_simpleeditbutton {
                   1426:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1427:     my $result='';
1.284     albertel 1428:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 1429: 	($target eq 'web') &&
1.284     albertel 1430:         (&Apache::lonnet::allowed('srm',$env{'request.course.id'}))) {
                   1431:         my $url=$env{'request.noversionuri'};
1.193     www      1432:         $url=~s/\?.*$//;
1.278     albertel 1433: 	my ($symb) = &Apache::lonxml::whichuser();
1.194     www      1434: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.278     albertel 1435:                 '<a href="'.$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      1436: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1437:     }
                   1438:     return $result;
                   1439: }
                   1440: 
                   1441: sub end_simpleeditbutton {
                   1442:     return '';
1.45      albertel 1443: }
1.34      albertel 1444: 
1.1       albertel 1445: 1;
                   1446: __END__

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