Annotation of loncom/homework/structuretags.pm, revision 1.271

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.271   ! albertel    4: # $Id: structuretags.pm,v 1.270 2004/10/12 22:55:22 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 $body_tag_start;
                     91:     if (!defined($found{'body'})) {
1.270     albertel   92: 	$body_tag_start='<body onload="'.&Apache::lonmenu::loadevents().'" '.
                     93: 	    'onunload="'.&Apache::lonmenu::unloadevents().'" ';
1.159     albertel   94: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                     95: 						  $safeeval);
1.199     www        96: 	if ($ENV{'browser.imagesuppress'} eq 'on') { $background=''; }
1.159     albertel   97: 	if ($background) {
                     98: 	    $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
                     99: 		$background;
                    100: 	    $body_tag_start.='background="'.$background.'" ';
                    101: 	} else {
                    102: 	    my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    103: 						   $safeeval);
1.199     www       104: 	    if (($bgcolor) && ($ENV{'browser.blackwhite'} ne 'on')) {
1.159     albertel  105: 		$body_tag_start.='bgcolor="'.$bgcolor.'" ';
                    106: 	    } else {
                    107: 		$body_tag_start.='bgcolor="#ffffff"';
                    108: 	    }
1.199     www       109: 	}
                    110: 	if ($ENV{'browser.fontenhance'} eq 'on') {
                    111: 	    $body_tag_start.=' style="font-size: x-large;" ';
1.159     albertel  112: 	}
                    113: 	$body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
                    114: 	if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
1.165     albertel  115: 	    my ($symb,undef,undef,undef,$publicuser)=
                    116: 		&Apache::lonxml::whichuser();
                    117: 	    if ($symb eq '' && !$publicuser) {
1.159     albertel  118: 		my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
1.211     albertel  119: 		$help=&mt("Browsing resource, all submissions are temporary.")."<br />";
1.159     albertel  120: 		$body_tag_start.=$help;
                    121: 	    }
                    122: 	}
1.245     albertel  123: 	$body_tag_start.=&Apache::lonxml::message_location();
1.159     albertel  124:     }
                    125:     my $form_tag_start;
                    126:     if (!defined($found{'form'})) {
1.271   ! albertel  127: 	$form_tag_start='<form name="lonhomework" method="post" action="';
        !           128: 	my $uri=$ENV{'request.uri'};
        !           129: 	if ($ENV{'request.enc'}) { $uri=&Apache::lonenc::encrypted($uri); }
        !           130: 	$form_tag_start.=$uri.'">';
1.159     albertel  131:     }
                    132:     return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.105     albertel  133: }
                    134: 
1.141     matthew   135: #use Time::HiRes();
1.105     albertel  136: sub get_resource_name {
1.159     albertel  137:     my ($parstack,$safeeval)=@_;
1.204     albertel  138:     if (defined($Apache::lonhomework::name)) {
                    139: 	return $Apache::lonhomework::name;
                    140:     }
1.159     albertel  141:     my $name=&Apache::lonnet::gettitle();
                    142:     if ($name eq '') {
                    143: 	$name=&Apache::lonnet::EXT('resource.title');
                    144: 	if ($name eq 'con_lost') { $name = ''; }
                    145:     }
1.204     albertel  146:     if ($name!~/\S+/) {
                    147: 	$name=$ENV{'request.uri'};
1.205     albertel  148: 	$name=~s-.*/([^/]+)$-$1-;
1.204     albertel  149:     }
1.159     albertel  150:     $Apache::lonhomework::name=$name;
                    151:     return $name;
1.105     albertel  152: }
                    153: 
                    154: sub setup_rndseed {
1.159     albertel  155:     my ($safeeval)=@_;
                    156:     my $rndseed;
1.162     albertel  157:     my ($symb)=&Apache::lonxml::whichuser();
1.247     albertel  158:     if ($ENV{'request.state'} eq "construct" || $symb eq '' ||
                    159:           $Apache::lonhomework::history{'resource.CODE'}) {
1.159     albertel  160: 	$rndseed=$ENV{'form.rndseed'};
                    161: 	if (!$rndseed) {
1.162     albertel  162: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    163: 	    if (!$rndseed) {
                    164: 		$rndseed=time;
                    165: 	    }
1.237     albertel  166: 	    $ENV{'form.rndseed'}=$rndseed;
1.162     albertel  167: 	}
1.210     albertel  168: 	if ($ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
                    169: 	    $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  170: 	    srand(time);
                    171: 	    $rndseed=int(rand(2100000000));
1.159     albertel  172: 	    $ENV{'form.rndseed'}=$rndseed;
1.180     albertel  173: 	    delete($ENV{'form.resetdata'});
                    174: 	    delete($ENV{'form.newrandomization'});
1.159     albertel  175: 	}
1.187     albertel  176: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
                    177: 	   $rndseed=join(',',&Math::Random::random_seed_from_phrase($rndseed));
                    178:         }
1.247     albertel  179:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    180: 	   $rndseed=&Apache::lonnet::rndseed();
                    181: 	}
1.221     albertel  182: 	if ($safeeval) {
                    183: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  184: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  185: 	}
1.159     albertel  186:     }
                    187:     return $rndseed;
1.105     albertel  188: }
                    189: 
1.268     albertel  190: sub remember_problem_state {
                    191:     return '
                    192:        <input type="hidden" name="problemstate" value="'.$ENV{'form.problemstate'}.'" />
                    193:        <input type="hidden" name="problemtype" value="'.$ENV{'form.problemtype'}.'" />
                    194:        <input type="hidden" name="problemstatus" value="'.$ENV{'form.problemstatus'}.'" />';
                    195: }
                    196: 
1.105     albertel  197: sub problem_edit_header {
1.268     albertel  198:     return '<input type="hidden" name="submitted" value="edit" />'.
                    199: 	&Apache::structuretags::remember_problem_state().'
1.210     albertel  200:        <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
1.243     matthew   201:        <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
                    202:        <input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
                    203:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> <hr />
                    204:        <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes and Edit').'" />
                    205:        <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
1.260     albertel  206:        &Apache::loncommon::help_open_menu('','Problem Editing Help','Problem_Editor_XML_Index','',5,'Authoring',undef,undef,undef,'Problem Editing Help')
                    207:        .'</td></tr></table>'.
1.228     www       208:        '<table border="0"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  209: }
                    210: 
                    211: sub problem_edit_footer {
1.210     albertel  212:     return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
1.255     www       213:     <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />'.
                    214:     &Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields).
                    215:     "\n</form>\n</body>\n</html>";
1.105     albertel  216: }
                    217: 
1.235     albertel  218: sub option {
                    219:     my ($value,$name) = @_;
                    220:     my $result ="<option value='".$value."' ";
                    221:     if ($ENV{'form.'.$name} eq $value) {
                    222: 	$result.=" selected='on' ";
                    223:     }
                    224:     $result.='>';
                    225:     return $result;
                    226: }
                    227: 
1.105     albertel  228: sub problem_web_to_edit_header {
1.159     albertel  229:     my ($rndseed)=@_;
1.210     albertel  230:     my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />
1.243     matthew   231:              <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
                    232:              <input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
                    233:              <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    234:              <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
1.210     albertel  235:              <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
1.270     albertel  236:               <input type="text" name="rndseed" size="10" value="'.
1.175     albertel  237: 	       $rndseed.'"
1.270     albertel  238:            onchange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
1.105     albertel  239:              <input type="checkbox" name="showallfoils" ';
1.159     albertel  240:     if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
1.228     www       241:     $result.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    242: 	&Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
                    243: 	'<hr />';
1.235     albertel  244:     $result.="
                    245: <nobr>
                    246: Problem Status:
                    247: <select name='problemstate'>
1.270     albertel  248:   <option value=''></option>
1.235     albertel  249:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    250:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    251:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    252:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    253:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    254: </select>
                    255: </nobr>
                    256: <nobr>
                    257: Problem Type:
                    258: <select name='problemtype'>
1.270     albertel  259:   <option value=''></option>
1.242     albertel  260:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
                    261:   ".&option('problem','problemtype').&mt("Homework problem")."</option>
                    262:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.235     albertel  263: </select>
                    264: </nobr>
                    265: <nobr>
                    266: Feedback Mode:
                    267: <select name='problemstatus'>
                    268:   <option value=''></option>
1.242     albertel  269:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
                    270:   ".&option('no', 'problemstatus').&mt("Don't Show Feedback")."</option>
1.235     albertel  271: </select>
                    272: </nobr>
1.242     albertel  273: <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
1.235     albertel  274: <hr />";
1.159     albertel  275:     my $numtoanalyze=$ENV{'form.numtoanalyze'};
1.176     albertel  276:     if (!$numtoanalyze) { $numtoanalyze=20; }
1.210     albertel  277:     $result.= '<input type="submit" name="problemmode" value='.
                    278: 	&mt('"Calculate answers').'" /> for
1.136     albertel  279:              <input type="text" name="numtoanalyze" value="'.
1.210     albertel  280: 	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
                    281: 	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
1.176     albertel  282: 						     '',undef,undef,300).
1.210     albertel  283: 						     '<hr />';
1.159     albertel  284:     return $result;
1.48      albertel  285: }
                    286: 
1.65      albertel  287: sub initialize_storage {
1.159     albertel  288:     %Apache::lonhomework::results=();
1.162     albertel  289:     %Apache::lonhomework::history=();
1.159     albertel  290:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.162     albertel  291:     if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
1.159     albertel  292: 	%Apache::lonhomework::history=
                    293: 	    &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
                    294: 	my ($temp)=keys %Apache::lonhomework::history ;
                    295: 	&Apache::lonxml::debug("Return message of $temp");
                    296:     } else {
                    297: 	%Apache::lonhomework::history=
                    298: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    299:     }
                    300:     #ignore error conditions
1.67      albertel  301:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  302:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  303: }
                    304: 
                    305: # -------------------------------------------------------------finalize_storage
                    306: # Stores away the result has to a student's environment
                    307: # checks form.grade_ for specific values, other wises stores
                    308: # to the running users environment
                    309: sub finalize_storage {
1.159     albertel  310:     my $result;
                    311:     my ($temp) = keys %Apache::lonhomework::results;
                    312:     if ( $temp ne '' ) {
                    313: 	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.162     albertel  314: 	if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
                    315: 	    $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
1.159     albertel  316: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
                    317: 					$ENV{'request.uri'},'',$domain,$name);
                    318: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    319: 	} else {
                    320: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    321: 					    $symb,$courseid,$domain,$name);
                    322: 	    &Apache::lonxml::debug('Store return message:'.$result);
                    323: 	}
1.67      albertel  324:     }
1.159     albertel  325:     return $result;
1.65      albertel  326: }
                    327: 
                    328: sub checkout_msg {
1.211     albertel  329:     my %lt=&Apache::lonlocal::texthash( 
                    330: 		'resource'=>'The resource needs to be checked out',
                    331: 		'id_expln'=>'As a resource gets checked out, a unique timestamped ID is given to it, and a permanent record is left in the system.',
                    332:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    333:                 'checkout'=>'Check out Exam for Viewing',
                    334: 		'checkout?'=>'Check out Exam?');
1.159     albertel  335:     return (<<ENDCHECKOUT);
1.211     albertel  336: <h2>$lt{'resource'}</h2>
                    337:     <p>$lt{'id_expln'}</p>
                    338: <font color="red">
                    339: <p>$lt{'warning'}</p>
1.91      albertel  340: </font>
1.270     albertel  341: <form name="checkout" method="post" action="$ENV{'request.uri'}">
1.91      albertel  342: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  343: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  344: </form>
                    345: ENDCHECKOUT
                    346: }
                    347: 
1.252     albertel  348: sub firstaccess_msg {
1.253     albertel  349:     my ($time,$symb)=@_;
                    350:     my ($map)=&Apache::lonnet::decode_symb($symb);
                    351:     my $foldertitle=&Apache::lonnet::gettitle($map);
                    352:     &Apache::lonxml::debug("map is $map title is $foldertitle");
1.252     albertel  353:     return (<<ENDCHECKOUT);
1.253     albertel  354: <h2>The resources in "$foldertitle" are open for a limited time. Once you click the 'Show Resource' button below you have $time to complete all resources "$foldertitle".</h2>
1.270     albertel  355: <form name="markaccess" method="post" action="$ENV{'request.uri'}">
1.252     albertel  356: <input type="hidden" name="markaccess" value="yes" />
                    357: <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
                    358: </form>
                    359: ENDCHECKOUT
                    360: }
                    361: 
1.204     albertel  362: sub init_problem_globals {
                    363:     my ($type)=@_;
                    364:     #initialize globals
                    365:     if ($type eq 'problem') {
                    366: 	$Apache::inputtags::part='0';
                    367: 	@Apache::inputtags::partlist=('0');
1.266     albertel  368: 	$Apache::lonhomework::problemstatus=&get_problem_status('0');
                    369: 	$Apache::lonhomework::ignore_response_errors=0;
                    370:     } elsif ($type eq 'library') {
1.204     albertel  371: 	$Apache::inputtags::part='';
                    372: 	@Apache::inputtags::partlist=();
                    373: 	$Apache::lonhomework::problemstatus='';	
1.266     albertel  374: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  375:     }
                    376:     @Apache::inputtags::responselist = ();
                    377:     @Apache::inputtags::importlist = ();
                    378:     @Apache::inputtags::previous=();
                    379:     @Apache::inputtags::previous_version=();
                    380:     $Apache::structuretags::printanswer='No';
                    381:     @Apache::structuretags::whileconds=();
                    382:     @Apache::structuretags::whilebody=();
                    383:     @Apache::structuretags::whileline=();
                    384:     $Apache::lonhomework::scantronmode=0;
                    385:     undef($Apache::lonhomework::name);
                    386: 
                    387: }
                    388: 
                    389: sub reset_problem_globals {
                    390:     my ($type)=@_;
                    391:     undef(%Apache::lonhomework::history);
                    392:     undef(%Apache::lonhomework::results);
                    393:     undef($Apache::inputtags::part);
1.208     albertel  394: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    395: #detect if we try to do 2 problems in one file
                    396: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  397:     undef($Apache::lonhomework::name);
                    398: }
                    399: 
1.241     albertel  400: sub set_problem_state {
1.240     albertel  401:     my ($part)=@_;
                    402:     if ($ENV{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
                    403: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    404: 	    'correct_by_student';
                    405:     }
                    406: }
                    407: 
1.241     albertel  408: sub get_problem_status {
                    409:     my ($part)=@_;
1.267     albertel  410:     my $problem_status;
1.241     albertel  411:     if ($ENV{'request.state'} eq 'construct' &&
                    412: 	defined($ENV{'form.problemstatus'})) {
                    413: 	$problem_status=$ENV{'form.problemstatus'};
1.267     albertel  414:     } else {
                    415: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    416: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
                    417: 	&Apache::lonxml::debug("env probstat is ".$ENV{'form.problemstatus'});
1.241     albertel  418:     }
                    419:     return $problem_status;
                    420: }
                    421: 
1.9       albertel  422: sub start_problem {
1.159     albertel  423:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19      albertel  424: 
1.184     albertel  425:     if ( $Apache::inputtags::part ne '' ||
                    426: 	 $Apache::lonhomework::parsing_a_problem) {
                    427: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
                    428: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
1.159     albertel  429: 	return '';
                    430:     }
1.184     albertel  431: 
                    432:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  433:     &init_problem_globals('problem');
1.166     albertel  434: 
                    435:     if (defined($ENV{'scantron.maxquest'})) {
                    436: 	$Apache::lonhomework::scantronmode=1;
                    437:     }
1.161     albertel  438: 
1.246     albertel  439:     &initialize_storage();
1.159     albertel  440:     if ($target ne 'analyze') {
                    441: 	if ($target eq 'web') {
                    442: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
1.238     albertel  443: 	}
1.241     albertel  444:        	if ($ENV{'request.state'} eq 'construct') { &set_problem_state('0'); }
1.159     albertel  445: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.237     albertel  446: 	if (($ENV{'request.state'} eq 'construct') &&
                    447: 	    defined($ENV{'form.problemtype'})) {
                    448: 	    $Apache::lonhomework::type=$ENV{'form.problemtype'};
                    449: 	}
1.240     albertel  450: 	&Apache::lonxml::debug("Found this to be of type :$Apache::ltonhomework::type:");
1.159     albertel  451:     }
1.164     albertel  452:     if ($Apache::lonhomework::type eq '' ) {
1.159     albertel  453: 	my $uri=$ENV{'request.uri'};
                    454: 	if ($uri=~/\.(\w+)$/) {
                    455: 	    $Apache::lonhomework::type=$1;
                    456: 	    &Apache::lonxml::debug("Using type of $1");
                    457: 	} else {
                    458: 	    $Apache::lonhomework::type='problem';
                    459: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    460: 	}
1.87      albertel  461:     }
1.58      www       462: 
1.159     albertel  463:     #added vars to the scripting enviroment
1.213     albertel  464:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  465:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  466:     &Apache::run::run($expression,$safeeval);
1.159     albertel  467:     my $status;
                    468:     my $accessmsg;
                    469: 
                    470:     #should get back a <html> or the neccesary stuff to start XML/MathML
                    471:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    472: 	&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    473:     if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
                    474: 
                    475:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    476:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    477: 	$target eq 'tex') {
                    478: 	#handle exam checkout
                    479: 	if ($Apache::lonhomework::type eq 'exam') {
                    480: 	    my $token=
                    481: 		$Apache::lonhomework::history{"resource.0.outtoken"};
                    482: 	    if (($ENV{'form.doescheckout'}) && (!$token)) {
                    483: 		$token=&Apache::lonxml::maketoken();
                    484: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    485: 		    $token;
                    486: 	    }
                    487: 	    $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  488: 	}
1.252     albertel  489: 	if ($ENV{'form.markaccess'}) {
                    490: 	    &Apache::lonnet::set_first_access('map');
                    491: 	}
1.159     albertel  492: 	#handle rand seed in construction space
                    493: 	my $rndseed=&setup_rndseed($safeeval);
1.162     albertel  494: 	my ($symb)=&Apache::lonxml::whichuser();
1.163     albertel  495: 	if ($ENV{'request.state'} ne "construct" && $symb eq '') {
1.162     albertel  496: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    497: 		$rndseed.'" />'.
                    498: 		    '<input type="submit" name="resetdata"
1.211     albertel  499:                              value="'.&mt('New Problem Variation').'" />'.
1.164     albertel  500: 		    '<input type="hidden" name="username"
1.267     albertel  501:                              value="'.$ENV{'form.username'}.'" />';
                    502: 	    if ($ENV{'user.adv'}) {
                    503: 		$form_tag_start.=
                    504: 		    ' <input type="checkbox" name="showallfoils" ';
                    505: 		if (defined($ENV{'form.showallfoils'})) {
                    506: 		    $form_tag_start.='checked="on"';
                    507: 		}
                    508: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils');
                    509: 	    }
                    510: 	    $form_tag_start.='<hr />';
1.162     albertel  511: 	}
1.159     albertel  512: 	($status,$accessmsg) = &Apache::lonhomework::check_access('0');
                    513: 	push (@Apache::inputtags::status,$status);
                    514: 	my $expression='$external::datestatus="'.$status.'";';
                    515: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    516: 	&Apache::run::run($expression,$safeeval);
                    517: 	&Apache::lonxml::debug("Got $status");
                    518: 	if (( $status eq 'CLOSED' ) ||
                    519: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  520: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  521: 	    ( $status eq 'BANNED') ||
1.216     albertel  522: 	    ( $status eq 'UNAVAILABLE') ||
                    523: 	    ( $status eq 'INVALID_ACCESS')) {
1.159     albertel  524: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
                    525: 	    if ( $target eq "web" ) {
                    526: 		$result.= $head_tag_start.'</head>';
                    527: 		my $msg=$body_tag_start;
                    528: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  529: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  530: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  531: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  532: 		}
1.216     albertel  533: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.159     albertel  534: 		    $msg.='The problem '.$accessmsg;
                    535: 		} elsif ($status eq 'UNCHECKEDOUT') {
                    536: 		    $msg.=&checkout_msg;
1.252     albertel  537: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  538: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.159     albertel  539: 		}
                    540: 		$result.=$msg.'<br />';
                    541: 	    } elsif ($target eq 'tex') {
                    542: 		$result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
                    543: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  544: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  545: 		} else {
1.211     albertel  546: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  547: 		}
                    548: 	    }
                    549: 	} elsif ($target eq 'web') {
                    550: 	    my $name= &get_resource_name($parstack,$safeeval);
1.227     albertel  551: 	    $result.="$head_tag_start<title>$name</title></head>
1.158     sakharuk  552:               $body_tag_start \n $form_tag_start".	
1.227     albertel  553: 	      '<input type="hidden" name="submitted" value="yes" />';
                    554: 	    # create a page header and exit
                    555: 	    if ($ENV{'request.state'} eq "construct") {
                    556: 		$result.= &problem_web_to_edit_header($ENV{'form.rndseed'});
                    557: 	    }
                    558: 	    # if we are viewing someone else preserve that info
                    559: 	    if (defined $ENV{'form.grade_symb'}) {
                    560: 		foreach my $field ('symb','courseid','domain','username') {
                    561: 		    $result .= '<input type="hidden" name="grade_'.$field.
                    562: 			'" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
1.159     albertel  563: 		}
                    564: 	    }
                    565: 	} elsif ($target eq 'tex') {
1.192     sakharuk  566: 	    my $startminipage = '';
1.191     sakharuk  567: 	    if (not $ENV{'form.problem_split'}=~/yes/) {
1.192     sakharuk  568: 		$startminipage = '\begin{minipage}{\textwidth}';
1.178     sakharuk  569: 	    }
1.159     albertel  570: 	    my $id = $Apache::inputtags::part;
                    571: 	    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.223     sakharuk  572: 	    my $packages=&Apache::lonnet::metadata($ENV{'request.uri'},'packages');
                    573: 	    my @packages = split /,/,$packages;
                    574: 	    my $allow_print_points = 0;
                    575: 	    foreach my $partial_key (@packages) {
1.230     albertel  576: 		if ($partial_key=~m/^part_0$/) {
1.223     sakharuk  577: 		    $allow_print_points=1;
1.159     albertel  578: 		}
                    579: 	    }
                    580: 	    my $duedate = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    581: 	    $duedate = POSIX::strftime("%c",localtime($duedate));
                    582: 	    my $temp_file;
                    583: 	    my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
                    584: 	    if (-e $filename) {
                    585: 		$temp_file = Apache::File->new($filename);
                    586: 	    } else {
                    587: 		$temp_file = Apache::File->new('>>'.$filename);
                    588: 	    }
                    589: 	    my @due_file_content = <$temp_file>;
                    590: 	    my $due_file_content = $due_file_content[$#due_file_content];
                    591: 	    chomp $due_file_content;
1.257     sakharuk  592: 	    my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
1.159     albertel  593: 	    if ($due_file_content ne $duedate) {
                    594: 		$temp_file = Apache::File->new('>'.$filename);
                    595: 		print $temp_file "$duedate\n";
                    596: 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
                    597: 		    if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
1.206     sakharuk  598: 			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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  599: 		    } else {
1.206     sakharuk  600: 			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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}{'.$name_of_resourse.'}';
1.159     albertel  601: 			if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    602: 		    }
1.104     sakharuk  603: 		} else {
1.159     albertel  604: 		    $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
1.104     sakharuk  605: 		}
1.101     sakharuk  606: 	    } else {
1.159     albertel  607: 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
1.206     sakharuk  608: 		    $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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}{'.$name_of_resourse.'}';	
1.159     albertel  609: 		    if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    610: 		} else {
                    611: 		    $result .= '\vskip 1mm \\\\\\\\';
                    612: 		}
                    613: 	    }
1.99      sakharuk  614: 	}
1.159     albertel  615:     } elsif ($target eq 'edit') {
                    616: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    617: 	    &problem_edit_header();
1.226     albertel  618: 	$Apache::lonxml::warnings_error_header=
                    619: 	    &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  620: 	my $temp=&Apache::edit::insertlist($target,$token);
                    621: 	$result.=$temp;
                    622:     } elsif ($target eq 'modified') {
                    623: 	$result=$token->[4];
                    624: 	$result.=&Apache::edit::handle_insert();
                    625:     } else {
                    626: 	# page_start returned a starting result, delete it if we don't need it
                    627: 	$result = '';
1.99      sakharuk  628:     }
1.159     albertel  629:     return $result;
1.9       albertel  630: }
                    631: 
                    632: sub end_problem {
1.159     albertel  633:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    634:     my $result='';
                    635:     my $status=$Apache::inputtags::status['-1'];
                    636:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    637: 	$target eq 'tex') {
1.249     albertel  638: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel  639: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel  640: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                    641: 		&Apache::inputtags::grade;
                    642: 	    } else {
                    643: 		# move any submission data to .hidden
                    644: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                    645: 	    }
1.159     albertel  646: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    647: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel  648: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel  649: 	    # if part is zero, no <part>s existed, so we need show the current
                    650: 	    # grading status
                    651: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    652: 	    $result.= $gradestatus;
                    653: 	}
                    654: 	if (
                    655: 	    (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
                    656: 	    ($target eq 'answer') || ($target eq 'tex')
                    657: 	   ) {
1.227     albertel  658: 	    if ($target ne 'tex' &&
                    659: 		$ENV{'form.answer_output_mode'} ne 'tex') {
1.254     www       660: 		$result.="</form>";
                    661: 		$result.=&Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields);
                    662: 		$result.="</body>\n";
1.159     albertel  663: 	    }
                    664: 	    if ($target eq 'web') {
                    665: 		$result.=&Apache::lonxml::xmlend();
                    666: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  667: 		my $endminipage = '';
1.191     sakharuk  668: 		if (not $ENV{'form.problem_split'}=~/yes/) {
1.178     sakharuk  669: 		    $endminipage = '\end{minipage}';
                    670: 		}
1.257     sakharuk  671:                 if ($ENV{'form.print_discussions'} eq 'yes') {
1.263     sakharuk  672: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.257     sakharuk  673: 		    $result=~s/<\/html>//;
1.159     albertel  674: 		} else {
1.262     sakharuk  675: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
                    676: 		    if (not $ENV{'request.symb'} =~ m/\.page_/) {
                    677: 			$result .= $endminipage.'\end{document} ';
                    678: 		    } else {
                    679: 			$result .= '';
                    680: 		    }
1.159     albertel  681: 		}
                    682: 	    }
                    683: 	}
                    684: 	if ($target eq 'grade') {
                    685: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    686: 	    &finalize_storage();
                    687: 	}
1.172     albertel  688: 	if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
1.173     albertel  689: 	    && $ENV{'form.answer_output_mode'} ne 'tex') {
1.172     albertel  690: 	    $result.='</html>'; # normally we get it from xmlend, but in CSTR
                    691: 	                        # we always show answer mode too.
1.159     albertel  692: 	}
                    693:     } elsif ($target eq 'meta') {
                    694: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  695: 	    @Apache::inputtags::response=();
1.159     albertel  696: 	    $result=&Apache::response::mandatory_part_meta;
                    697: 	}
1.215     albertel  698: 	$result.=&Apache::response::meta_part_order();
1.258     albertel  699: 	$result.=&Apache::response::meta_response_order();
1.159     albertel  700:     } elsif ($target eq 'edit') {
                    701: 	&Apache::lonxml::debug("in end_problem with $target, edit");
                    702: 	$result = &problem_edit_footer();
                    703:     }
1.155     albertel  704: 
1.177     albertel  705:     if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
                    706: 	&Apache::inputtags::check_for_duplicate_ids();
                    707:     }
1.204     albertel  708: 
                    709:     &reset_problem_globals('problem');
1.159     albertel  710: 
                    711:     return $result;
1.48      albertel  712: }
                    713: 
1.108     albertel  714: 
1.48      albertel  715: sub start_library {
1.159     albertel  716:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    717:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.244     albertel  718:     if ($$tagstack[0] eq 'library') {
                    719: 	&init_problem_globals('library');
                    720: 	$Apache::lonhomework::type='problem';
                    721:     }
1.159     albertel  722:     if ($target eq 'edit') {
                    723: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    724: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    725: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    726: 	    &problem_edit_header();
                    727: 	my $temp=&Apache::edit::insertlist($target,$token);
                    728: 	$result.=$temp;
                    729:     } elsif ($target eq 'modified') {
                    730: 	$result=$token->[4];
                    731: 	$result.=&Apache::edit::handle_insert();
                    732:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
                    733: 	     $ENV{'request.state'} eq "construct" ) {
                    734: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    735: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    736: 	my $name=&get_resource_name($parstack,$safeeval);
                    737: 	my $rndseed=&setup_rndseed($safeeval);
                    738: 	$result.="$head_tag_start<title>$name</title></head>
1.105     albertel  739:               $body_tag_start \n $form_tag_start".	
1.159     albertel  740: 		  '<input type="hidden" name="submitted" value="yes" />';
                    741: 	$result.=&problem_web_to_edit_header($rndseed);
                    742:     }
                    743:     return $result;
1.48      albertel  744: }
                    745: 
                    746: sub end_library {
1.159     albertel  747:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    748:     my $result='';
                    749:     if ($target eq 'edit') {
                    750: 	$result=&problem_edit_footer();
                    751:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
                    752: 	     $ENV{'request.state'} eq "construct") {
                    753: 	$result.='</form></body>'.&Apache::lonxml::xmlend();
                    754:     }
1.204     albertel  755:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel  756:     return $result;
1.197     www       757: }
                    758: 
                    759: sub start_definetag {
                    760:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    761: 
                    762:     my $result;
                    763: 
                    764:     my $name = $token->[2]->{'name'};
                    765:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
                    766:     if ($name=~/^\//) {
                    767: 	$result=
                    768:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                    769:     } else {
                    770: 	$result=
                    771:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                    772:     }
                    773:     $skip=~s/\</\&lt\;/gs;
                    774:     $skip=~s/\>/\&gt\;/gs;
                    775:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                    776:     return $result;
                    777: }
                    778: 
                    779: sub end_definetag {
                    780:     return '';
1.1       albertel  781: }
                    782: 
                    783: sub start_block {
1.201     albertel  784:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel  785: 
                    786:     my $result;
1.1       albertel  787: 
1.160     albertel  788:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.131     albertel  789: 	$target eq 'tex' || $target eq 'analyze') {
1.159     albertel  790: 	my $code = $token->[2]->{'condition'};
1.201     albertel  791: 	if (defined($code)) {
1.137     albertel  792: 	    if (!$Apache::lonxml::default_homework_loaded) {
                    793: 		&Apache::lonxml::default_homework_load($safeeval);
                    794: 	    }
1.131     albertel  795: 	    $result = &Apache::run::run($code,$safeeval);
                    796: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                    797: 	} else {
                    798: 	    $result='1';
                    799: 	}
                    800: 	if ( ! $result ) {
1.201     albertel  801: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel  802: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    803: 	}
                    804: 	$result='';
                    805:     } elsif ($target eq 'edit') {
                    806: 	$result .=&Apache::edit::tag_start($target,$token);
                    807: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                    808: 					  $token,40);
                    809: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    810:     } elsif ($target eq 'modified') {
                    811: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    812: 						     $safeeval,'condition');
                    813: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel  814:     }
1.131     albertel  815:     return $result;
1.1       albertel  816: }
                    817: 
                    818: sub end_block {
1.167     www       819:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    820:     my $result;
                    821:     if ($target eq "edit") {
                    822: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    823:     }
                    824:     return $result;
                    825: }
                    826: 
                    827: sub start_languageblock {
1.201     albertel  828:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www       829: 
                    830:     my $result;
                    831: 
                    832:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    833: 	$target eq 'tex' || $target eq 'analyze') {
1.201     albertel  834: 	my $include = $token->[2]->{'include'};
                    835: 	my $exclude = $token->[2]->{'exclude'};
                    836:         my %languages=&Apache::loncommon::display_languages();
                    837:         $result='1';
                    838: 	if ($include) {
                    839:             $result='';
                    840:             foreach (split(/\,/,$include)) {
                    841:                 if ($languages{$_}) { $result='1'; }
                    842:             }
                    843: 	}
                    844:         if ($exclude) {
                    845:             foreach (split(/\,/,$exclude)) {
                    846:                 if ($languages{$_}) { $result='0'; }
                    847:             }
                    848: 	}
                    849: 	if ( ! $result ) {
                    850: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                    851: 						   $style);
                    852: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    853: 	}
                    854: 	$result='';
1.167     www       855:     } elsif ($target eq 'edit') {
                    856: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel  857: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www       858: 					  $token,40);
1.211     albertel  859: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www       860: 					  $token,40);
                    861: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    862:     } elsif ($target eq 'modified') {
                    863: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel  864: 						     $safeeval,'include',
                    865: 						     'exclude');
1.167     www       866: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                    867:     }
                    868:     return $result;
                    869: }
                    870: 
                    871: sub end_languageblock {
1.170     www       872:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    873:     my $result;
1.201     albertel  874:     if ($target eq "edit") {
1.170     www       875: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    876:     }
                    877:     return $result;
                    878: }
                    879: 
                    880: sub start_instructorcomment {
1.201     albertel  881:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www       882: 
                    883:     my $result;
                    884: 
                    885:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    886: 	$target eq 'tex' || $target eq 'analyze') {
                    887:         $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
1.269     sakharuk  888: 	if ( (! $result) or ($ENV{'form.instructor_comments'} eq 'hide')) {
1.201     albertel  889: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                    890: 						   $parser,$style);
1.170     www       891: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    892: 	}
                    893: 	$result='';
                    894:     } elsif ($target eq 'edit') {
                    895: 	$result .=&Apache::edit::tag_start($target,$token);
                    896: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    897:     }
                    898:     return $result;
                    899: }
                    900: 
                    901: sub end_instructorcomment {
1.159     albertel  902:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel  903:     my $result;
                    904:     if ($target eq "edit") {
                    905: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    906:     }
                    907:     return $result;
1.4       tsai      908: }
                    909: 
                    910: sub start_while {
1.159     albertel  911:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    912: 
1.160     albertel  913:     my $result;
1.161     albertel  914:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.160     albertel  915: 	$target eq 'tex' || $target eq 'analyze') {
                    916: 	my $code = $token->[2]->{'condition'};
1.4       tsai      917: 
1.160     albertel  918: 	push( @Apache::structuretags::whileconds, $code);
                    919: 	if (!$Apache::lonxml::default_homework_loaded) {
                    920: 	    &Apache::lonxml::default_homework_load($safeeval);
                    921: 	}
                    922: 	my $result = &Apache::run::run($code,$safeeval);
1.161     albertel  923: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
1.160     albertel  924: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel  925: 	push( @Apache::structuretags::whileline, $token->[5]);
                    926: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel  927: 	if ( $result ) {
                    928: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                    929: 	}
                    930:     } elsif ($target eq 'edit') {
                    931: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel  932: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel  933: 					  $token,40);
                    934: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    935:     } elsif ($target eq 'modified') {
                    936: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    937: 						     $safeeval,'condition');
                    938: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel  939:     }
1.160     albertel  940:     return $result;
1.4       tsai      941: }
                    942: 
                    943: sub end_while {
1.159     albertel  944:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel  945:     my $result;
                    946: 
                    947:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    948: 	$target eq 'tex' || $target eq 'analyze') {
                    949: 	my $code = pop(@Apache::structuretags::whileconds);
                    950: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel  951: 	my $line = pop(@Apache::structuretags::whileline);
                    952: 	my $return = &Apache::run::run($code,$safeeval);
                    953: 	my $starttime=time;
                    954: 	my $error=0;
                    955: 	while ($return) {
                    956: 	    if (time-$starttime >
                    957: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.270     albertel  958: 		#$return = 0; $error=1; next;
1.161     albertel  959: 	    }
                    960: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                    961: 	    $return = &Apache::run::run($code,$safeeval);
                    962: 	}
                    963: 	if ($error) {
1.270     albertel  964: 	    &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  965: 	}
                    966:     } elsif ($target eq "edit") {
                    967: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel  968:     }
1.160     albertel  969:     return $result;
1.1       albertel  970: }
1.6       tsai      971: 
1.160     albertel  972: # <randomlist show="1">
1.6       tsai      973: #  <tag1>..</tag1>
                    974: #  <tag2>..</tag2>
                    975: #  <tag3>..</tag3>
1.160     albertel  976: #  ...
1.6       tsai      977: # </randomlist>
                    978: sub start_randomlist {
1.159     albertel  979:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    980:     my $result;
                    981:     if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
                    982: 	$target eq 'tex' || $target eq 'analyze') {
                    983: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
                    984: 	my $b_parser= HTML::TokeParser->new(\$body);
                    985: 	my $b_tok;
                    986: 	my @randomlist;
                    987: 	my $list_item;
                    988: 	while($b_tok = $b_parser->get_token() ) {
                    989: 	    if($b_tok->[0] eq 'S') { # start tag
                    990: 		# get content of the tag until matching end tag
                    991: 		# get all text upto the matching tag
                    992: 		# and push the content into @randomlist
                    993: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                    994: 							   $b_parser);
                    995: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                    996: 		push(@randomlist,$list_item);
                    997: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                    998:                 #         $list_item</b>";
                    999: 	    }
                   1000: 	    if($b_tok->[0] eq 'T') { # text
                   1001: 		# what to do with text in between tags?
                   1002: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1003: 	    }
                   1004: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1005: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1006: 	    # }
                   1007: 	}
                   1008: 	my @idx_arr = (0 .. $#randomlist);
                   1009: 	&Apache::structuretags::shuffle(\@idx_arr);
                   1010: 	my $bodytext = '';
                   1011: 	my $show=$#randomlist;
                   1012: 	my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1013: 	$showarg--;
                   1014: 	if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                   1015: 	for(0 .. $show) {
                   1016: 	    $bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1017: 	}
                   1018: 	&Apache::lonxml::newparser($parser,\$bodytext);
                   1019:     } elsif ($target eq 'edit' ) {
                   1020: 	$result .=&Apache::edit::tag_start($target,$token);
                   1021: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1022: 					   $token,5);
                   1023: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1024:     } elsif ($target eq 'modified' ) {
                   1025: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1026: 						     $safeeval,'show');
                   1027: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1028:     }
                   1029:     return $result;
1.7       tsai     1030: }
                   1031: 
                   1032: sub shuffle {
                   1033:     my $a=shift;
                   1034:     my $i;
1.70      albertel 1035:     if (defined(@$a)) {
1.251     albertel 1036: 	&Apache::response::pushrandomnumber();
1.159     albertel 1037: 	for($i=@$a;--$i;) {
                   1038: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1039: 	    next if $i == $j;
                   1040: 	    @$a[$i,$j] = @$a[$j,$i];
                   1041: 	}
1.251     albertel 1042: 	&Apache::response::poprandomnumber();
1.7       tsai     1043:     }
1.6       tsai     1044: }
                   1045: 
                   1046: sub end_randomlist {
1.159     albertel 1047:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1048:     my $result;
                   1049:     if ($target eq 'edit' ) {
                   1050: 	$result=&Apache::edit::tag_end($target,$token,
                   1051: 				       'End Randomly Parsed Block');
                   1052:     }
                   1053:     return $result;
1.6       tsai     1054: }
                   1055: 
1.11      albertel 1056: sub start_part {
1.159     albertel 1057:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1058:     my $result='';
                   1059:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
                   1060:     if ($id eq '') { $id = $Apache::lonxml::curdepth; }
                   1061:     $Apache::inputtags::part=$id;
1.177     albertel 1062:     push(@Apache::inputtags::partlist,$id);
                   1063:     @Apache::inputtags::response=();
1.159     albertel 1064:     @Apache::inputtags::previous=();
                   1065:     @Apache::inputtags::previous_version=();
1.241     albertel 1066:     $Apache::lonhomework::problemstatus=&get_problem_status($id);
1.159     albertel 1067:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1068:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1069:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
                   1070: 
1.214     albertel 1071:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1072:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1073:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1074: 
                   1075:     if ($target eq 'meta') {
1.224     www      1076: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1077: 	return &Apache::response::mandatory_part_meta.
                   1078: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1079:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1080: 	     $target eq 'answer' || $target eq 'tex') {
                   1081: 	if ($hidden) {
                   1082: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1083: 	} else {
                   1084: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1085: 	    push (@Apache::inputtags::status,$status);
                   1086: 	    my $expression='$external::datestatus="'.$status.'";';
                   1087: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1088: 	    &Apache::run::run($expression,$safeeval);
1.240     albertel 1089: 	    if ($ENV{'request.state'} eq 'construct') {
1.241     albertel 1090: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1091: 	    }
1.216     albertel 1092: 	    if (( $status eq 'CLOSED' ) ||
                   1093: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1094: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1095: 		( $status eq 'BANNED') ||
                   1096: 		( $status eq 'UNAVAILABLE') ||
                   1097: 		( $status eq 'INVALID_ACCESS')) {
1.159     albertel 1098: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1099: 		if ( $target eq "web" ) {
1.211     albertel 1100: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1101: 		} elsif ( $target eq 'tex' ) {
1.195     sakharuk 1102: 		    if (not $ENV{'form.problem_split'}=~/yes/) {
1.211     albertel 1103: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1104: 		    } else {
1.211     albertel 1105: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1106: 		    }
1.159     albertel 1107: 		}
                   1108: 	    } else {
                   1109: 		if ($target eq 'tex') {
1.195     sakharuk 1110: 		    if (not $ENV{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1111: 			if ($$tagstack[-2] eq 'td') {
                   1112: 			    $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1113: 			} else {
                   1114: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1115: 			}
1.195     sakharuk 1116: 		    }
1.159     albertel 1117: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.230     albertel 1118: 		    my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'packages');
1.222     sakharuk 1119: 		    my @allkeys = split /,/,$allkeys;
                   1120: 		    my $allow_print_points = 0;
                   1121: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1122: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1123: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1124: 			}
                   1125: 		    }
                   1126: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1127: 		} elsif ($target eq 'web') {
                   1128: 		    $result.='<a name="'.&Apache::lonnet::escape($Apache::inputtags::part).'" />';
1.159     albertel 1129: 		}
                   1130: 	    }
                   1131: 	}
                   1132:     } elsif ($target eq 'edit') {
                   1133: 	$result.=&Apache::edit::tag_start($target,$token);
                   1134: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1135: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1136: 	    '&nbsp;&nbsp;'.
                   1137: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1138: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1139:     } elsif ($target eq 'modified') {
                   1140: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1141: 						     $safeeval,'id','display');
1.159     albertel 1142: 	if ($constructtag) {
1.225     albertel 1143: 	    #limiting ids to only letters numbers, and space
1.224     www      1144: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1145: 	    $result = &Apache::edit::rebuild_tag($token);
                   1146: 	    $result.=&Apache::edit::handle_insert();
                   1147: 	}
                   1148:     }
                   1149:     return $result;
1.11      albertel 1150: }
                   1151: 
                   1152: sub end_part {
1.159     albertel 1153:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1154:     &Apache::lonxml::debug("in end_part $target ");
                   1155:     my $status=$Apache::inputtags::status['-1'];
                   1156:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
                   1157:     my $result='';
                   1158:     if ( $target eq 'meta' ) {
                   1159: 	$result='';
1.249     albertel 1160:     } elsif ($target eq 'grade') {
                   1161: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
                   1162: 	    !$hidden) {
                   1163: 	    $result=&Apache::inputtags::grade;
                   1164: 	} else {
                   1165: 	    # move any submission data to .hidden
                   1166: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1167: 	}
1.159     albertel 1168:     } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
                   1169: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1170: 							$target);
1.212     albertel 1171: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1172: 	    $gradestatus='';
                   1173: 	}
1.159     albertel 1174: 	$result=$gradestatus;
1.265     sakharuk 1175: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1176:     } elsif ($target eq 'edit') {
                   1177: 	$result=&Apache::edit::end_table();
1.159     albertel 1178:     }
                   1179:     pop @Apache::inputtags::status;
                   1180:     $Apache::inputtags::part='';
                   1181:     return $result;
1.11      albertel 1182: }
1.1       albertel 1183: 
1.25      albertel 1184: sub start_preduedate {
1.159     albertel 1185:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1186:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
1.236     albertel 1187: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.159     albertel 1188: 	if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1189: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1190: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.159     albertel 1191: 	    &Apache::lonxml::get_all_text("/preduedate",$parser);
                   1192: 	}
1.24      albertel 1193:     }
1.159     albertel 1194:     return '';
1.24      albertel 1195: }
                   1196: 
1.25      albertel 1197: sub end_preduedate {
1.159     albertel 1198:     return '';
1.24      albertel 1199: }
                   1200: 
1.25      albertel 1201: sub start_postanswerdate {
1.159     albertel 1202:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.234     albertel 1203:     if ($target eq 'web' || $target eq 'grade') {
1.159     albertel 1204: 	if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
                   1205: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser);
                   1206: 	}
                   1207:     } elsif ($target eq 'tex') {
1.234     albertel 1208: 	&Apache::lonxml::get_all_text("/postanswerdate",$parser);
1.159     albertel 1209:     }
                   1210:     return '';
1.24      albertel 1211: }
                   1212: 
1.25      albertel 1213: sub end_postanswerdate {
1.159     albertel 1214:     return '';
1.24      albertel 1215: }
                   1216: 
1.25      albertel 1217: sub start_notsolved {
1.159     albertel 1218:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1219:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1220: 	$target eq 'tex') {
                   1221: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1222: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1223: 	if ($gradestatus =~ /^correct/ &&
                   1224: 	    &Apache::response::show_answer()) {
1.159     albertel 1225: 	    &Apache::lonxml::debug("skipping");
                   1226: 	    &Apache::lonxml::get_all_text("/notsolved",$parser);
                   1227: 	}
1.24      albertel 1228:     }
1.159     albertel 1229:     return '';
1.24      albertel 1230: }
                   1231: 
1.25      albertel 1232: sub end_notsolved {
1.159     albertel 1233:     return '';
1.24      albertel 1234: }
                   1235: 
                   1236: sub start_solved {
1.159     albertel 1237:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1238:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1239: 	$target eq 'tex') {
                   1240: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1241: 	if ($gradestatus !~ /^correct/ ||
                   1242: 	    !&Apache::response::show_answer()) {
1.159     albertel 1243: 	    &Apache::lonxml::get_all_text("/solved",$parser);
                   1244: 	}
1.24      albertel 1245:     }
1.159     albertel 1246:     return '';
1.24      albertel 1247: }
                   1248: 
                   1249: sub end_solved {
1.248     albertel 1250:     return '';
                   1251: }
                   1252: 
                   1253: sub start_problemtype {
                   1254:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1255:     my $result;
                   1256:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1257: 	$target eq 'tex' || $target eq 'analyze') {
                   1258: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1259: 	if (!defined($mode)) { $mode='show'; }
                   1260: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1261: 	my $found=0;
                   1262: 	foreach my $type (split(',',$for)) {
                   1263: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1264: 	}
                   1265: 	if ($mode eq 'show' && !$found) {
                   1266: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1267: 	}
                   1268: 	if ($mode eq 'hide' && $found) {
                   1269: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1270: 	}
                   1271:     } elsif ($target eq 'edit') {
                   1272: 	$result .=&Apache::edit::tag_start($target,$token);
                   1273: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1274: 					   [['show','Show'],
                   1275: 					    ['hide','Hide']]
                   1276: 					   ,$token);
                   1277: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1278: 					     [ ['exam','Exam/Quiz Problem'],
                   1279: 					       ['survey','Survey'],
                   1280: 					       ['problem','Homework Problem'] ]
                   1281: 					     ,$token);
                   1282: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1283:     } elsif ($target eq 'modified') {
                   1284: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1285: 						     $safeeval,'mode','for');
                   1286: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1287:     }
                   1288:     return $result;
                   1289: }
                   1290: 
                   1291: sub end_problemtype {
1.159     albertel 1292:     return '';
1.24      albertel 1293: }
1.34      albertel 1294: 
                   1295: sub start_startouttext {
1.159     albertel 1296:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1297:     my @result=(''.'');
                   1298:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1299:     return (@result);
1.34      albertel 1300: }
1.159     albertel 1301: 
1.34      albertel 1302: sub end_startouttext {
1.159     albertel 1303:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1304:     my $result='';
                   1305:     my $text='';
                   1306: 
                   1307:     if ($target eq 'edit') {
                   1308: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser);
1.211     albertel 1309: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1310: <td>".&mt('Delete:').
1.159     albertel 1311:                  &Apache::edit::deletelist($target,$token)
                   1312: 		 ."</td>
1.42      albertel 1313: <td>".
1.159     albertel 1314:                  &Apache::edit::insertlist($target,$token).
                   1315: 		 &Apache::edit::end_row().
                   1316:                  &Apache::edit::start_spanning_row()."\n"
1.188     bowersj2 1317: 		 . &Apache::loncommon::helpLatexCheatsheet () .
1.255     www      1318: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1319:     }
                   1320:     if ($target eq 'modified') {
1.219     albertel 1321: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1322:     }
                   1323:     if ($target eq 'tex') {
                   1324: 	$result .= '\noindent ';
                   1325:     }
                   1326:     return $result;
1.34      albertel 1327: }
1.159     albertel 1328: 
1.34      albertel 1329: sub start_endouttext {
1.159     albertel 1330:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1331:     my $result='';
                   1332:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1333:     if ($target eq "modified") {
                   1334: 	$result='<endouttext />'.
                   1335: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1336:     return $result;
1.34      albertel 1337: }
1.159     albertel 1338: 
1.34      albertel 1339: sub end_endouttext {
1.159     albertel 1340:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1341:     my @result=('','');
                   1342:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1343:     return (@result);
1.34      albertel 1344: }
1.159     albertel 1345: 
1.45      albertel 1346: sub delete_startouttext {
1.159     albertel 1347:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1348:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
                   1349:     my $text=$$parser['-1']->get_text("/endouttext");
                   1350:     my $ntoken=$$parser['-1']->get_token();
                   1351:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1352:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1353:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1354:     # they did the last time round
                   1355:     &Apache::lonxml::increasedepth($ntoken);
                   1356:     &Apache::lonxml::decreasedepth($ntoken);
                   1357:     return 1;
1.193     www      1358: }
                   1359: 
                   1360: sub start_simpleeditbutton {
                   1361:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1362:     my $result='';
                   1363:     if (($target eq 'web') &&
                   1364:         (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'}))) {
1.220     www      1365:         my $url=$ENV{'request.noversionuri'};
1.193     www      1366:         $url=~s/\?.*$//;
1.194     www      1367: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.211     albertel 1368:                 '<a href="'.$url.'/smpedit">'.&mt('Simple Problem Editor').'</a> - '.&mt('Note: it can take up to 10 minutes for changes to take effect for all users.').
1.196     www      1369: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1370:     }
                   1371:     return $result;
                   1372: }
                   1373: 
                   1374: sub end_simpleeditbutton {
                   1375:     return '';
1.45      albertel 1376: }
1.34      albertel 1377: 
1.1       albertel 1378: 1;
                   1379: __END__

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