Annotation of loncom/homework/structuretags.pm, revision 1.266

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.266   ! albertel    4: # $Id: structuretags.pm,v 1.265 2004/08/25 19:16:25 sakharuk 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;
1.1       albertel   39: 
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().
                     87: 	    &Apache::lonhtmlcommon::spellheader();
1.159     albertel   88:     }
                     89:     my $body_tag_start;
                     90:     if (!defined($found{'body'})) {
                     91: 	$body_tag_start='<body onLoad="'.&Apache::lonmenu::loadevents().'" '.
                     92: 	    'onUnload="'.&Apache::lonmenu::unloadevents().'" ';
                     93: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                     94: 						  $safeeval);
1.199     www        95: 	if ($ENV{'browser.imagesuppress'} eq 'on') { $background=''; }
1.159     albertel   96: 	if ($background) {
                     97: 	    $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
                     98: 		$background;
                     99: 	    $body_tag_start.='background="'.$background.'" ';
                    100: 	} else {
                    101: 	    my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    102: 						   $safeeval);
1.199     www       103: 	    if (($bgcolor) && ($ENV{'browser.blackwhite'} ne 'on')) {
1.159     albertel  104: 		$body_tag_start.='bgcolor="'.$bgcolor.'" ';
                    105: 	    } else {
                    106: 		$body_tag_start.='bgcolor="#ffffff"';
                    107: 	    }
1.199     www       108: 	}
                    109: 	if ($ENV{'browser.fontenhance'} eq 'on') {
                    110: 	    $body_tag_start.=' style="font-size: x-large;" ';
1.159     albertel  111: 	}
                    112: 	$body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
                    113: 	if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
1.165     albertel  114: 	    my ($symb,undef,undef,undef,$publicuser)=
                    115: 		&Apache::lonxml::whichuser();
                    116: 	    if ($symb eq '' && !$publicuser) {
1.159     albertel  117: 		my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
1.211     albertel  118: 		$help=&mt("Browsing resource, all submissions are temporary.")."<br />";
1.159     albertel  119: 		$body_tag_start.=$help;
                    120: 	    }
                    121: 	}
1.245     albertel  122: 	$body_tag_start.=&Apache::lonxml::message_location();
1.159     albertel  123:     }
                    124:     my $form_tag_start;
                    125:     if (!defined($found{'form'})) {
                    126: 	$form_tag_start='<form name="lonhomework" method="POST" action="'.
                    127: 	    $ENV{'request.uri'}.'">';
                    128:     }
                    129:     return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.105     albertel  130: }
                    131: 
1.141     matthew   132: #use Time::HiRes();
1.105     albertel  133: sub get_resource_name {
1.159     albertel  134:     my ($parstack,$safeeval)=@_;
1.204     albertel  135:     if (defined($Apache::lonhomework::name)) {
                    136: 	return $Apache::lonhomework::name;
                    137:     }
1.159     albertel  138:     my $name=&Apache::lonnet::gettitle();
                    139:     if ($name eq '') {
                    140: 	$name=&Apache::lonnet::EXT('resource.title');
                    141: 	if ($name eq 'con_lost') { $name = ''; }
                    142:     }
1.204     albertel  143:     if ($name!~/\S+/) {
                    144: 	$name=$ENV{'request.uri'};
1.205     albertel  145: 	$name=~s-.*/([^/]+)$-$1-;
1.204     albertel  146:     }
1.159     albertel  147:     $Apache::lonhomework::name=$name;
                    148:     return $name;
1.105     albertel  149: }
                    150: 
                    151: sub setup_rndseed {
1.159     albertel  152:     my ($safeeval)=@_;
                    153:     my $rndseed;
1.162     albertel  154:     my ($symb)=&Apache::lonxml::whichuser();
1.247     albertel  155:     if ($ENV{'request.state'} eq "construct" || $symb eq '' ||
                    156:           $Apache::lonhomework::history{'resource.CODE'}) {
1.159     albertel  157: 	$rndseed=$ENV{'form.rndseed'};
                    158: 	if (!$rndseed) {
1.162     albertel  159: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    160: 	    if (!$rndseed) {
                    161: 		$rndseed=time;
                    162: 	    }
1.237     albertel  163: 	    $ENV{'form.rndseed'}=$rndseed;
1.162     albertel  164: 	}
1.210     albertel  165: 	if ($ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
                    166: 	    $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  167: 	    srand(time);
                    168: 	    $rndseed=int(rand(2100000000));
1.159     albertel  169: 	    $ENV{'form.rndseed'}=$rndseed;
1.180     albertel  170: 	    delete($ENV{'form.resetdata'});
                    171: 	    delete($ENV{'form.newrandomization'});
1.159     albertel  172: 	}
1.187     albertel  173: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
                    174: 	   $rndseed=join(',',&Math::Random::random_seed_from_phrase($rndseed));
                    175:         }
1.247     albertel  176:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    177: 	   $rndseed=&Apache::lonnet::rndseed();
                    178: 	}
1.221     albertel  179: 	if ($safeeval) {
                    180: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  181: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  182: 	}
1.159     albertel  183:     }
                    184:     return $rndseed;
1.105     albertel  185: }
                    186: 
                    187: sub problem_edit_header {
1.159     albertel  188:     return '<input type="hidden" name="submitted" value="edit" />
1.210     albertel  189:        <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
1.243     matthew   190:        <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
                    191:        <input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
                    192:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> <hr />
                    193:        <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes and Edit').'" />
                    194:        <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
1.260     albertel  195:        &Apache::loncommon::help_open_menu('','Problem Editing Help','Problem_Editor_XML_Index','',5,'Authoring',undef,undef,undef,'Problem Editing Help')
                    196:        .'</td></tr></table>'.
1.228     www       197:        '<table border="0"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  198: }
                    199: 
                    200: sub problem_edit_footer {
1.210     albertel  201:     return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
1.255     www       202:     <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />'.
                    203:     &Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields).
                    204:     "\n</form>\n</body>\n</html>";
1.105     albertel  205: }
                    206: 
1.235     albertel  207: sub option {
                    208:     my ($value,$name) = @_;
                    209:     my $result ="<option value='".$value."' ";
                    210:     if ($ENV{'form.'.$name} eq $value) {
                    211: 	$result.=" selected='on' ";
                    212:     }
                    213:     $result.='>';
                    214:     return $result;
                    215: }
                    216: 
1.105     albertel  217: sub problem_web_to_edit_header {
1.159     albertel  218:     my ($rndseed)=@_;
1.210     albertel  219:     my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />
1.243     matthew   220:              <input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />
                    221:              <input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
                    222:              <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    223:              <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
1.210     albertel  224:              <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
1.175     albertel  225:               <input type="text" name="rndseed" width="10" value="'.
                    226: 	       $rndseed.'"
                    227:            onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
1.105     albertel  228:              <input type="checkbox" name="showallfoils" ';
1.159     albertel  229:     if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
1.228     www       230:     $result.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    231: 	&Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
                    232: 	'<hr />';
1.235     albertel  233:     $result.="
                    234: <nobr>
                    235: Problem Status:
                    236: <select name='problemstate'>
                    237:   <option name=''></option>
                    238:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    239:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    240:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    241:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    242:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    243: </select>
                    244: </nobr>
                    245: <nobr>
                    246: Problem Type:
                    247: <select name='problemtype'>
                    248:   <option name=''></option>
1.242     albertel  249:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
                    250:   ".&option('problem','problemtype').&mt("Homework problem")."</option>
                    251:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.235     albertel  252: </select>
                    253: </nobr>
                    254: <nobr>
                    255: Feedback Mode:
                    256: <select name='problemstatus'>
                    257:   <option value=''></option>
1.242     albertel  258:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
                    259:   ".&option('no', 'problemstatus').&mt("Don't Show Feedback")."</option>
1.235     albertel  260: </select>
                    261: </nobr>
1.242     albertel  262: <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
1.235     albertel  263: <hr />";
1.159     albertel  264:     my $numtoanalyze=$ENV{'form.numtoanalyze'};
1.176     albertel  265:     if (!$numtoanalyze) { $numtoanalyze=20; }
1.210     albertel  266:     $result.= '<input type="submit" name="problemmode" value='.
                    267: 	&mt('"Calculate answers').'" /> for
1.136     albertel  268:              <input type="text" name="numtoanalyze" value="'.
1.210     albertel  269: 	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
                    270: 	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
1.176     albertel  271: 						     '',undef,undef,300).
1.210     albertel  272: 						     '<hr />';
1.159     albertel  273:     return $result;
1.48      albertel  274: }
                    275: 
1.65      albertel  276: sub initialize_storage {
1.159     albertel  277:     %Apache::lonhomework::results=();
1.162     albertel  278:     %Apache::lonhomework::history=();
1.159     albertel  279:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.162     albertel  280:     if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
1.159     albertel  281: 	%Apache::lonhomework::history=
                    282: 	    &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
                    283: 	my ($temp)=keys %Apache::lonhomework::history ;
                    284: 	&Apache::lonxml::debug("Return message of $temp");
                    285:     } else {
                    286: 	%Apache::lonhomework::history=
                    287: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    288:     }
                    289:     #ignore error conditions
1.67      albertel  290:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  291:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  292: }
                    293: 
                    294: # -------------------------------------------------------------finalize_storage
                    295: # Stores away the result has to a student's environment
                    296: # checks form.grade_ for specific values, other wises stores
                    297: # to the running users environment
                    298: sub finalize_storage {
1.159     albertel  299:     my $result;
                    300:     my ($temp) = keys %Apache::lonhomework::results;
                    301:     if ( $temp ne '' ) {
                    302: 	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.162     albertel  303: 	if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
                    304: 	    $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
1.159     albertel  305: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
                    306: 					$ENV{'request.uri'},'',$domain,$name);
                    307: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    308: 	} else {
                    309: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    310: 					    $symb,$courseid,$domain,$name);
                    311: 	    &Apache::lonxml::debug('Store return message:'.$result);
                    312: 	}
1.67      albertel  313:     }
1.159     albertel  314:     return $result;
1.65      albertel  315: }
                    316: 
                    317: sub checkout_msg {
1.211     albertel  318:     my %lt=&Apache::lonlocal::texthash( 
                    319: 		'resource'=>'The resource needs to be checked out',
                    320: 		'id_expln'=>'As a resource gets checked out, a unique timestamped ID is given to it, and a permanent record is left in the system.',
                    321:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    322:                 'checkout'=>'Check out Exam for Viewing',
                    323: 		'checkout?'=>'Check out Exam?');
1.159     albertel  324:     return (<<ENDCHECKOUT);
1.211     albertel  325: <h2>$lt{'resource'}</h2>
                    326:     <p>$lt{'id_expln'}</p>
                    327: <font color="red">
                    328: <p>$lt{'warning'}</p>
1.91      albertel  329: </font>
                    330: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
                    331: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  332: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  333: </form>
                    334: ENDCHECKOUT
                    335: }
                    336: 
1.252     albertel  337: sub firstaccess_msg {
1.253     albertel  338:     my ($time,$symb)=@_;
                    339:     my ($map)=&Apache::lonnet::decode_symb($symb);
                    340:     my $foldertitle=&Apache::lonnet::gettitle($map);
                    341:     &Apache::lonxml::debug("map is $map title is $foldertitle");
1.252     albertel  342:     return (<<ENDCHECKOUT);
1.253     albertel  343: <h2>The resources in "$foldertitle" are open for a limited time. Once you click the 'Show Resource' button below you have $time to complete all resources "$foldertitle".</h2>
1.252     albertel  344: <form name="markaccess" method="POST" action="$ENV{'request.uri'}">
                    345: <input type="hidden" name="markaccess" value="yes" />
                    346: <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
                    347: </form>
                    348: ENDCHECKOUT
                    349: }
                    350: 
1.204     albertel  351: sub init_problem_globals {
                    352:     my ($type)=@_;
                    353:     #initialize globals
                    354:     if ($type eq 'problem') {
                    355: 	$Apache::inputtags::part='0';
                    356: 	@Apache::inputtags::partlist=('0');
1.266   ! albertel  357: 	$Apache::lonhomework::problemstatus=&get_problem_status('0');
        !           358: 	$Apache::lonhomework::ignore_response_errors=0;
        !           359:     } elsif ($type eq 'library') {
1.204     albertel  360: 	$Apache::inputtags::part='';
                    361: 	@Apache::inputtags::partlist=();
                    362: 	$Apache::lonhomework::problemstatus='';	
1.266   ! albertel  363: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  364:     }
                    365:     @Apache::inputtags::responselist = ();
                    366:     @Apache::inputtags::importlist = ();
                    367:     @Apache::inputtags::previous=();
                    368:     @Apache::inputtags::previous_version=();
                    369:     $Apache::structuretags::printanswer='No';
                    370:     @Apache::structuretags::whileconds=();
                    371:     @Apache::structuretags::whilebody=();
                    372:     @Apache::structuretags::whileline=();
                    373:     $Apache::lonhomework::scantronmode=0;
                    374:     undef($Apache::lonhomework::name);
                    375: 
                    376: }
                    377: 
                    378: sub reset_problem_globals {
                    379:     my ($type)=@_;
                    380:     undef(%Apache::lonhomework::history);
                    381:     undef(%Apache::lonhomework::results);
                    382:     undef($Apache::inputtags::part);
1.208     albertel  383: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    384: #detect if we try to do 2 problems in one file
                    385: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  386:     undef($Apache::lonhomework::name);
                    387: }
                    388: 
1.241     albertel  389: sub set_problem_state {
1.240     albertel  390:     my ($part)=@_;
                    391:     if ($ENV{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
                    392: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    393: 	    'correct_by_student';
                    394:     }
                    395: }
                    396: 
1.241     albertel  397: sub get_problem_status {
                    398:     my ($part)=@_;
                    399:     my $problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    400:     &Apache::lonxml::debug("problem status for $part is $problem_status");
                    401:     &Apache::lonxml::debug("env probstat is ".$ENV{'form.problemstatus'});
                    402:     if ($ENV{'request.state'} eq 'construct' &&
                    403: 	defined($ENV{'form.problemstatus'})) {
                    404: 	$problem_status=$ENV{'form.problemstatus'};
                    405:     }
                    406:     return $problem_status;
                    407: }
                    408: 
1.9       albertel  409: sub start_problem {
1.159     albertel  410:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19      albertel  411: 
1.184     albertel  412:     if ( $Apache::inputtags::part ne '' ||
                    413: 	 $Apache::lonhomework::parsing_a_problem) {
                    414: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
                    415: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
1.159     albertel  416: 	return '';
                    417:     }
1.184     albertel  418: 
                    419:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  420:     &init_problem_globals('problem');
1.166     albertel  421: 
                    422:     if (defined($ENV{'scantron.maxquest'})) {
                    423: 	$Apache::lonhomework::scantronmode=1;
                    424:     }
1.161     albertel  425: 
1.246     albertel  426:     &initialize_storage();
1.159     albertel  427:     if ($target ne 'analyze') {
                    428: 	if ($target eq 'web') {
                    429: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
1.238     albertel  430: 	}
1.241     albertel  431:        	if ($ENV{'request.state'} eq 'construct') { &set_problem_state('0'); }
1.159     albertel  432: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.237     albertel  433: 	if (($ENV{'request.state'} eq 'construct') &&
                    434: 	    defined($ENV{'form.problemtype'})) {
                    435: 	    $Apache::lonhomework::type=$ENV{'form.problemtype'};
                    436: 	}
1.240     albertel  437: 	&Apache::lonxml::debug("Found this to be of type :$Apache::ltonhomework::type:");
1.159     albertel  438:     }
1.164     albertel  439:     if ($Apache::lonhomework::type eq '' ) {
1.159     albertel  440: 	my $uri=$ENV{'request.uri'};
                    441: 	if ($uri=~/\.(\w+)$/) {
                    442: 	    $Apache::lonhomework::type=$1;
                    443: 	    &Apache::lonxml::debug("Using type of $1");
                    444: 	} else {
                    445: 	    $Apache::lonhomework::type='problem';
                    446: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    447: 	}
1.87      albertel  448:     }
1.58      www       449: 
1.159     albertel  450:     #added vars to the scripting enviroment
1.213     albertel  451:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  452:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  453:     &Apache::run::run($expression,$safeeval);
1.159     albertel  454:     my $status;
                    455:     my $accessmsg;
                    456: 
                    457:     #should get back a <html> or the neccesary stuff to start XML/MathML
                    458:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    459: 	&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    460:     if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
                    461: 
                    462:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    463:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    464: 	$target eq 'tex') {
                    465: 	#handle exam checkout
                    466: 	if ($Apache::lonhomework::type eq 'exam') {
                    467: 	    my $token=
                    468: 		$Apache::lonhomework::history{"resource.0.outtoken"};
                    469: 	    if (($ENV{'form.doescheckout'}) && (!$token)) {
                    470: 		$token=&Apache::lonxml::maketoken();
                    471: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    472: 		    $token;
                    473: 	    }
                    474: 	    $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  475: 	}
1.252     albertel  476: 	if ($ENV{'form.markaccess'}) {
                    477: 	    &Apache::lonnet::set_first_access('map');
                    478: 	}
1.159     albertel  479: 	#handle rand seed in construction space
                    480: 	my $rndseed=&setup_rndseed($safeeval);
1.162     albertel  481: 	my ($symb)=&Apache::lonxml::whichuser();
1.163     albertel  482: 	if ($ENV{'request.state'} ne "construct" && $symb eq '') {
1.162     albertel  483: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    484: 		$rndseed.'" />'.
                    485: 		    '<input type="submit" name="resetdata"
1.211     albertel  486:                              value="'.&mt('New Problem Variation').'" />'.
1.164     albertel  487: 		    '<input type="hidden" name="username"
1.185     albertel  488:                              value="'.$ENV{'form.username'}.'" /> <br />';
1.162     albertel  489: 	}
1.159     albertel  490: 	($status,$accessmsg) = &Apache::lonhomework::check_access('0');
                    491: 	push (@Apache::inputtags::status,$status);
                    492: 	my $expression='$external::datestatus="'.$status.'";';
                    493: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    494: 	&Apache::run::run($expression,$safeeval);
                    495: 	&Apache::lonxml::debug("Got $status");
                    496: 	if (( $status eq 'CLOSED' ) ||
                    497: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  498: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  499: 	    ( $status eq 'BANNED') ||
1.216     albertel  500: 	    ( $status eq 'UNAVAILABLE') ||
                    501: 	    ( $status eq 'INVALID_ACCESS')) {
1.159     albertel  502: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
                    503: 	    if ( $target eq "web" ) {
                    504: 		$result.= $head_tag_start.'</head>';
                    505: 		my $msg=$body_tag_start;
                    506: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  507: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  508: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  509: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  510: 		}
1.216     albertel  511: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.159     albertel  512: 		    $msg.='The problem '.$accessmsg;
                    513: 		} elsif ($status eq 'UNCHECKEDOUT') {
                    514: 		    $msg.=&checkout_msg;
1.252     albertel  515: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  516: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.159     albertel  517: 		}
                    518: 		$result.=$msg.'<br />';
                    519: 	    } elsif ($target eq 'tex') {
                    520: 		$result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
                    521: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  522: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  523: 		} else {
1.211     albertel  524: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  525: 		}
                    526: 	    }
                    527: 	} elsif ($target eq 'web') {
                    528: 	    my $name= &get_resource_name($parstack,$safeeval);
1.227     albertel  529: 	    $result.="$head_tag_start<title>$name</title></head>
1.158     sakharuk  530:               $body_tag_start \n $form_tag_start".	
1.227     albertel  531: 	      '<input type="hidden" name="submitted" value="yes" />';
                    532: 	    # create a page header and exit
                    533: 	    if ($ENV{'request.state'} eq "construct") {
                    534: 		$result.= &problem_web_to_edit_header($ENV{'form.rndseed'});
                    535: 	    }
                    536: 	    # if we are viewing someone else preserve that info
                    537: 	    if (defined $ENV{'form.grade_symb'}) {
                    538: 		foreach my $field ('symb','courseid','domain','username') {
                    539: 		    $result .= '<input type="hidden" name="grade_'.$field.
                    540: 			'" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
1.159     albertel  541: 		}
                    542: 	    }
                    543: 	} elsif ($target eq 'tex') {
1.192     sakharuk  544: 	    my $startminipage = '';
1.191     sakharuk  545: 	    if (not $ENV{'form.problem_split'}=~/yes/) {
1.192     sakharuk  546: 		$startminipage = '\begin{minipage}{\textwidth}';
1.178     sakharuk  547: 	    }
1.159     albertel  548: 	    my $id = $Apache::inputtags::part;
                    549: 	    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.223     sakharuk  550: 	    my $packages=&Apache::lonnet::metadata($ENV{'request.uri'},'packages');
                    551: 	    my @packages = split /,/,$packages;
                    552: 	    my $allow_print_points = 0;
                    553: 	    foreach my $partial_key (@packages) {
1.230     albertel  554: 		if ($partial_key=~m/^part_0$/) {
1.223     sakharuk  555: 		    $allow_print_points=1;
1.159     albertel  556: 		}
                    557: 	    }
                    558: 	    my $duedate = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    559: 	    $duedate = POSIX::strftime("%c",localtime($duedate));
                    560: 	    my $temp_file;
                    561: 	    my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
                    562: 	    if (-e $filename) {
                    563: 		$temp_file = Apache::File->new($filename);
                    564: 	    } else {
                    565: 		$temp_file = Apache::File->new('>>'.$filename);
                    566: 	    }
                    567: 	    my @due_file_content = <$temp_file>;
                    568: 	    my $due_file_content = $due_file_content[$#due_file_content];
                    569: 	    chomp $due_file_content;
1.257     sakharuk  570: 	    my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
1.159     albertel  571: 	    if ($due_file_content ne $duedate) {
                    572: 		$temp_file = Apache::File->new('>'.$filename);
                    573: 		print $temp_file "$duedate\n";
                    574: 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
                    575: 		    if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
1.206     sakharuk  576: 			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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  577: 		    } else {
1.206     sakharuk  578: 			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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}{'.$name_of_resourse.'}';
1.159     albertel  579: 			if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    580: 		    }
1.104     sakharuk  581: 		} else {
1.159     albertel  582: 		    $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
1.104     sakharuk  583: 		}
1.101     sakharuk  584: 	    } else {
1.159     albertel  585: 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
1.206     sakharuk  586: 		    $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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}{'.$name_of_resourse.'}';	
1.159     albertel  587: 		    if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    588: 		} else {
                    589: 		    $result .= '\vskip 1mm \\\\\\\\';
                    590: 		}
                    591: 	    }
1.99      sakharuk  592: 	}
1.159     albertel  593:     } elsif ($target eq 'edit') {
                    594: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    595: 	    &problem_edit_header();
1.226     albertel  596: 	$Apache::lonxml::warnings_error_header=
                    597: 	    &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  598: 	my $temp=&Apache::edit::insertlist($target,$token);
                    599: 	$result.=$temp;
                    600:     } elsif ($target eq 'modified') {
                    601: 	$result=$token->[4];
                    602: 	$result.=&Apache::edit::handle_insert();
                    603:     } else {
                    604: 	# page_start returned a starting result, delete it if we don't need it
                    605: 	$result = '';
1.99      sakharuk  606:     }
1.159     albertel  607:     return $result;
1.9       albertel  608: }
                    609: 
                    610: sub end_problem {
1.159     albertel  611:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    612:     my $result='';
                    613:     my $status=$Apache::inputtags::status['-1'];
                    614:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    615: 	$target eq 'tex') {
1.249     albertel  616: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel  617: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel  618: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                    619: 		&Apache::inputtags::grade;
                    620: 	    } else {
                    621: 		# move any submission data to .hidden
                    622: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                    623: 	    }
1.159     albertel  624: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    625: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel  626: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel  627: 	    # if part is zero, no <part>s existed, so we need show the current
                    628: 	    # grading status
                    629: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    630: 	    $result.= $gradestatus;
                    631: 	}
                    632: 	if (
                    633: 	    (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
                    634: 	    ($target eq 'answer') || ($target eq 'tex')
                    635: 	   ) {
1.227     albertel  636: 	    if ($target ne 'tex' &&
                    637: 		$ENV{'form.answer_output_mode'} ne 'tex') {
1.254     www       638: 		$result.="</form>";
                    639: 		$result.=&Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields);
                    640: 		$result.="</body>\n";
1.159     albertel  641: 	    }
                    642: 	    if ($target eq 'web') {
                    643: 		$result.=&Apache::lonxml::xmlend();
                    644: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  645: 		my $endminipage = '';
1.191     sakharuk  646: 		if (not $ENV{'form.problem_split'}=~/yes/) {
1.178     sakharuk  647: 		    $endminipage = '\end{minipage}';
                    648: 		}
1.257     sakharuk  649:                 if ($ENV{'form.print_discussions'} eq 'yes') {
1.263     sakharuk  650: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.257     sakharuk  651: 		    $result=~s/<\/html>//;
1.159     albertel  652: 		} else {
1.262     sakharuk  653: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
                    654: 		    if (not $ENV{'request.symb'} =~ m/\.page_/) {
                    655: 			$result .= $endminipage.'\end{document} ';
                    656: 		    } else {
                    657: 			$result .= '';
                    658: 		    }
1.159     albertel  659: 		}
                    660: 	    }
                    661: 	}
                    662: 	if ($target eq 'grade') {
                    663: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    664: 	    &finalize_storage();
                    665: 	}
1.172     albertel  666: 	if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
1.173     albertel  667: 	    && $ENV{'form.answer_output_mode'} ne 'tex') {
1.172     albertel  668: 	    $result.='</html>'; # normally we get it from xmlend, but in CSTR
                    669: 	                        # we always show answer mode too.
1.159     albertel  670: 	}
                    671:     } elsif ($target eq 'meta') {
                    672: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  673: 	    @Apache::inputtags::response=();
1.159     albertel  674: 	    $result=&Apache::response::mandatory_part_meta;
                    675: 	}
1.215     albertel  676: 	$result.=&Apache::response::meta_part_order();
1.258     albertel  677: 	$result.=&Apache::response::meta_response_order();
1.159     albertel  678:     } elsif ($target eq 'edit') {
                    679: 	&Apache::lonxml::debug("in end_problem with $target, edit");
                    680: 	$result = &problem_edit_footer();
                    681:     }
1.155     albertel  682: 
1.177     albertel  683:     if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
                    684: 	&Apache::inputtags::check_for_duplicate_ids();
                    685:     }
1.204     albertel  686: 
                    687:     &reset_problem_globals('problem');
1.159     albertel  688: 
                    689:     return $result;
1.48      albertel  690: }
                    691: 
1.108     albertel  692: 
1.48      albertel  693: sub start_library {
1.159     albertel  694:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    695:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.244     albertel  696:     if ($$tagstack[0] eq 'library') {
                    697: 	&init_problem_globals('library');
                    698: 	$Apache::lonhomework::type='problem';
                    699:     }
1.159     albertel  700:     if ($target eq 'edit') {
                    701: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    702: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    703: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    704: 	    &problem_edit_header();
                    705: 	my $temp=&Apache::edit::insertlist($target,$token);
                    706: 	$result.=$temp;
                    707:     } elsif ($target eq 'modified') {
                    708: 	$result=$token->[4];
                    709: 	$result.=&Apache::edit::handle_insert();
                    710:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
                    711: 	     $ENV{'request.state'} eq "construct" ) {
                    712: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    713: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    714: 	my $name=&get_resource_name($parstack,$safeeval);
                    715: 	my $rndseed=&setup_rndseed($safeeval);
                    716: 	$result.="$head_tag_start<title>$name</title></head>
1.105     albertel  717:               $body_tag_start \n $form_tag_start".	
1.159     albertel  718: 		  '<input type="hidden" name="submitted" value="yes" />';
                    719: 	$result.=&problem_web_to_edit_header($rndseed);
                    720:     }
                    721:     return $result;
1.48      albertel  722: }
                    723: 
                    724: sub end_library {
1.159     albertel  725:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    726:     my $result='';
                    727:     if ($target eq 'edit') {
                    728: 	$result=&problem_edit_footer();
                    729:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
                    730: 	     $ENV{'request.state'} eq "construct") {
                    731: 	$result.='</form></body>'.&Apache::lonxml::xmlend();
                    732:     }
1.204     albertel  733:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel  734:     return $result;
1.197     www       735: }
                    736: 
                    737: sub start_definetag {
                    738:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    739: 
                    740:     my $result;
                    741: 
                    742:     my $name = $token->[2]->{'name'};
                    743:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
                    744:     if ($name=~/^\//) {
                    745: 	$result=
                    746:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                    747:     } else {
                    748: 	$result=
                    749:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                    750:     }
                    751:     $skip=~s/\</\&lt\;/gs;
                    752:     $skip=~s/\>/\&gt\;/gs;
                    753:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                    754:     return $result;
                    755: }
                    756: 
                    757: sub end_definetag {
                    758:     return '';
1.1       albertel  759: }
                    760: 
                    761: sub start_block {
1.201     albertel  762:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel  763: 
                    764:     my $result;
1.1       albertel  765: 
1.160     albertel  766:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.131     albertel  767: 	$target eq 'tex' || $target eq 'analyze') {
1.159     albertel  768: 	my $code = $token->[2]->{'condition'};
1.201     albertel  769: 	if (defined($code)) {
1.137     albertel  770: 	    if (!$Apache::lonxml::default_homework_loaded) {
                    771: 		&Apache::lonxml::default_homework_load($safeeval);
                    772: 	    }
1.131     albertel  773: 	    $result = &Apache::run::run($code,$safeeval);
                    774: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                    775: 	} else {
                    776: 	    $result='1';
                    777: 	}
                    778: 	if ( ! $result ) {
1.201     albertel  779: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel  780: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    781: 	}
                    782: 	$result='';
                    783:     } elsif ($target eq 'edit') {
                    784: 	$result .=&Apache::edit::tag_start($target,$token);
                    785: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                    786: 					  $token,40);
                    787: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    788:     } elsif ($target eq 'modified') {
                    789: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    790: 						     $safeeval,'condition');
                    791: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel  792:     }
1.131     albertel  793:     return $result;
1.1       albertel  794: }
                    795: 
                    796: sub end_block {
1.167     www       797:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    798:     my $result;
                    799:     if ($target eq "edit") {
                    800: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    801:     }
                    802:     return $result;
                    803: }
                    804: 
                    805: sub start_languageblock {
1.201     albertel  806:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www       807: 
                    808:     my $result;
                    809: 
                    810:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    811: 	$target eq 'tex' || $target eq 'analyze') {
1.201     albertel  812: 	my $include = $token->[2]->{'include'};
                    813: 	my $exclude = $token->[2]->{'exclude'};
                    814:         my %languages=&Apache::loncommon::display_languages();
                    815:         $result='1';
                    816: 	if ($include) {
                    817:             $result='';
                    818:             foreach (split(/\,/,$include)) {
                    819:                 if ($languages{$_}) { $result='1'; }
                    820:             }
                    821: 	}
                    822:         if ($exclude) {
                    823:             foreach (split(/\,/,$exclude)) {
                    824:                 if ($languages{$_}) { $result='0'; }
                    825:             }
                    826: 	}
                    827: 	if ( ! $result ) {
                    828: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                    829: 						   $style);
                    830: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    831: 	}
                    832: 	$result='';
1.167     www       833:     } elsif ($target eq 'edit') {
                    834: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel  835: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www       836: 					  $token,40);
1.211     albertel  837: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www       838: 					  $token,40);
                    839: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    840:     } elsif ($target eq 'modified') {
                    841: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel  842: 						     $safeeval,'include',
                    843: 						     'exclude');
1.167     www       844: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                    845:     }
                    846:     return $result;
                    847: }
                    848: 
                    849: sub end_languageblock {
1.170     www       850:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    851:     my $result;
1.201     albertel  852:     if ($target eq "edit") {
1.170     www       853: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    854:     }
                    855:     return $result;
                    856: }
                    857: 
                    858: sub start_instructorcomment {
1.201     albertel  859:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www       860: 
                    861:     my $result;
                    862: 
                    863:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    864: 	$target eq 'tex' || $target eq 'analyze') {
                    865:         $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
                    866: 	if ( ! $result ) {
1.201     albertel  867: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                    868: 						   $parser,$style);
1.170     www       869: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    870: 	}
                    871: 	$result='';
                    872:     } elsif ($target eq 'edit') {
                    873: 	$result .=&Apache::edit::tag_start($target,$token);
                    874: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    875:     }
                    876:     return $result;
                    877: }
                    878: 
                    879: sub end_instructorcomment {
1.159     albertel  880:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel  881:     my $result;
                    882:     if ($target eq "edit") {
                    883: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    884:     }
                    885:     return $result;
1.4       tsai      886: }
                    887: 
                    888: sub start_while {
1.159     albertel  889:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    890: 
1.160     albertel  891:     my $result;
1.161     albertel  892:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.160     albertel  893: 	$target eq 'tex' || $target eq 'analyze') {
                    894: 	my $code = $token->[2]->{'condition'};
1.4       tsai      895: 
1.160     albertel  896: 	push( @Apache::structuretags::whileconds, $code);
                    897: 	if (!$Apache::lonxml::default_homework_loaded) {
                    898: 	    &Apache::lonxml::default_homework_load($safeeval);
                    899: 	}
                    900: 	my $result = &Apache::run::run($code,$safeeval);
1.161     albertel  901: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
1.160     albertel  902: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel  903: 	push( @Apache::structuretags::whileline, $token->[5]);
                    904: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel  905: 	if ( $result ) {
                    906: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                    907: 	}
                    908:     } elsif ($target eq 'edit') {
                    909: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel  910: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel  911: 					  $token,40);
                    912: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    913:     } elsif ($target eq 'modified') {
                    914: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    915: 						     $safeeval,'condition');
                    916: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel  917:     }
1.160     albertel  918:     return $result;
1.4       tsai      919: }
                    920: 
                    921: sub end_while {
1.159     albertel  922:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel  923:     my $result;
                    924: 
                    925:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    926: 	$target eq 'tex' || $target eq 'analyze') {
                    927: 	my $code = pop(@Apache::structuretags::whileconds);
                    928: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel  929: 	my $line = pop(@Apache::structuretags::whileline);
                    930: 	my $return = &Apache::run::run($code,$safeeval);
                    931: 	my $starttime=time;
                    932: 	my $error=0;
                    933: 	while ($return) {
                    934: 	    if (time-$starttime >
                    935: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
                    936: 		$return = 0; $error=1; next;
                    937: 	    }
                    938: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                    939: 	    $return = &Apache::run::run($code,$safeeval);
                    940: 	}
                    941: 	if ($error) {
1.211     albertel  942: 	    &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  943: 	}
                    944:     } elsif ($target eq "edit") {
                    945: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel  946:     }
1.160     albertel  947:     return $result;
1.1       albertel  948: }
1.6       tsai      949: 
1.160     albertel  950: # <randomlist show="1">
1.6       tsai      951: #  <tag1>..</tag1>
                    952: #  <tag2>..</tag2>
                    953: #  <tag3>..</tag3>
1.160     albertel  954: #  ...
1.6       tsai      955: # </randomlist>
                    956: sub start_randomlist {
1.159     albertel  957:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    958:     my $result;
                    959:     if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
                    960: 	$target eq 'tex' || $target eq 'analyze') {
                    961: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
                    962: 	my $b_parser= HTML::TokeParser->new(\$body);
                    963: 	my $b_tok;
                    964: 	my @randomlist;
                    965: 	my $list_item;
                    966: 	while($b_tok = $b_parser->get_token() ) {
                    967: 	    if($b_tok->[0] eq 'S') { # start tag
                    968: 		# get content of the tag until matching end tag
                    969: 		# get all text upto the matching tag
                    970: 		# and push the content into @randomlist
                    971: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                    972: 							   $b_parser);
                    973: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                    974: 		push(@randomlist,$list_item);
                    975: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                    976:                 #         $list_item</b>";
                    977: 	    }
                    978: 	    if($b_tok->[0] eq 'T') { # text
                    979: 		# what to do with text in between tags?
                    980: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                    981: 	    }
                    982: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                    983: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                    984: 	    # }
                    985: 	}
                    986: 	my @idx_arr = (0 .. $#randomlist);
                    987: 	&Apache::structuretags::shuffle(\@idx_arr);
                    988: 	my $bodytext = '';
                    989: 	my $show=$#randomlist;
                    990: 	my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                    991: 	$showarg--;
                    992: 	if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                    993: 	for(0 .. $show) {
                    994: 	    $bodytext .= "$randomlist[ $idx_arr[$_] ]";
                    995: 	}
                    996: 	&Apache::lonxml::newparser($parser,\$bodytext);
                    997:     } elsif ($target eq 'edit' ) {
                    998: 	$result .=&Apache::edit::tag_start($target,$token);
                    999: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1000: 					   $token,5);
                   1001: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1002:     } elsif ($target eq 'modified' ) {
                   1003: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1004: 						     $safeeval,'show');
                   1005: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1006:     }
                   1007:     return $result;
1.7       tsai     1008: }
                   1009: 
                   1010: sub shuffle {
                   1011:     my $a=shift;
                   1012:     my $i;
1.70      albertel 1013:     if (defined(@$a)) {
1.251     albertel 1014: 	&Apache::response::pushrandomnumber();
1.159     albertel 1015: 	for($i=@$a;--$i;) {
                   1016: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1017: 	    next if $i == $j;
                   1018: 	    @$a[$i,$j] = @$a[$j,$i];
                   1019: 	}
1.251     albertel 1020: 	&Apache::response::poprandomnumber();
1.7       tsai     1021:     }
1.6       tsai     1022: }
                   1023: 
                   1024: sub end_randomlist {
1.159     albertel 1025:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1026:     my $result;
                   1027:     if ($target eq 'edit' ) {
                   1028: 	$result=&Apache::edit::tag_end($target,$token,
                   1029: 				       'End Randomly Parsed Block');
                   1030:     }
                   1031:     return $result;
1.6       tsai     1032: }
                   1033: 
1.11      albertel 1034: sub start_part {
1.159     albertel 1035:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1036:     my $result='';
                   1037:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
                   1038:     if ($id eq '') { $id = $Apache::lonxml::curdepth; }
                   1039:     $Apache::inputtags::part=$id;
1.177     albertel 1040:     push(@Apache::inputtags::partlist,$id);
                   1041:     @Apache::inputtags::response=();
1.159     albertel 1042:     @Apache::inputtags::previous=();
                   1043:     @Apache::inputtags::previous_version=();
1.241     albertel 1044:     $Apache::lonhomework::problemstatus=&get_problem_status($id);
1.159     albertel 1045:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1046:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1047:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
                   1048: 
1.214     albertel 1049:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1050:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1051:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1052: 
                   1053:     if ($target eq 'meta') {
1.224     www      1054: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1055: 	return &Apache::response::mandatory_part_meta.
                   1056: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1057:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1058: 	     $target eq 'answer' || $target eq 'tex') {
                   1059: 	if ($hidden) {
                   1060: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1061: 	} else {
                   1062: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1063: 	    push (@Apache::inputtags::status,$status);
                   1064: 	    my $expression='$external::datestatus="'.$status.'";';
                   1065: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1066: 	    &Apache::run::run($expression,$safeeval);
1.240     albertel 1067: 	    if ($ENV{'request.state'} eq 'construct') {
1.241     albertel 1068: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1069: 	    }
1.216     albertel 1070: 	    if (( $status eq 'CLOSED' ) ||
                   1071: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1072: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1073: 		( $status eq 'BANNED') ||
                   1074: 		( $status eq 'UNAVAILABLE') ||
                   1075: 		( $status eq 'INVALID_ACCESS')) {
1.159     albertel 1076: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1077: 		if ( $target eq "web" ) {
1.211     albertel 1078: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1079: 		} elsif ( $target eq 'tex' ) {
1.195     sakharuk 1080: 		    if (not $ENV{'form.problem_split'}=~/yes/) {
1.211     albertel 1081: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1082: 		    } else {
1.211     albertel 1083: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1084: 		    }
1.159     albertel 1085: 		}
                   1086: 	    } else {
                   1087: 		if ($target eq 'tex') {
1.195     sakharuk 1088: 		    if (not $ENV{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1089: 			if ($$tagstack[-2] eq 'td') {
                   1090: 			    $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1091: 			} else {
                   1092: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1093: 			}
1.195     sakharuk 1094: 		    }
1.159     albertel 1095: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.230     albertel 1096: 		    my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'packages');
1.222     sakharuk 1097: 		    my @allkeys = split /,/,$allkeys;
                   1098: 		    my $allow_print_points = 0;
                   1099: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1100: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1101: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1102: 			}
                   1103: 		    }
                   1104: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1105: 		} elsif ($target eq 'web') {
                   1106: 		    $result.='<a name="'.&Apache::lonnet::escape($Apache::inputtags::part).'" />';
1.159     albertel 1107: 		}
                   1108: 	    }
                   1109: 	}
                   1110:     } elsif ($target eq 'edit') {
                   1111: 	$result.=&Apache::edit::tag_start($target,$token);
                   1112: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1113: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1114: 	    '&nbsp;&nbsp;'.
                   1115: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1116: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1117:     } elsif ($target eq 'modified') {
                   1118: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1119: 						     $safeeval,'id','display');
1.159     albertel 1120: 	if ($constructtag) {
1.225     albertel 1121: 	    #limiting ids to only letters numbers, and space
1.224     www      1122: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1123: 	    $result = &Apache::edit::rebuild_tag($token);
                   1124: 	    $result.=&Apache::edit::handle_insert();
                   1125: 	}
                   1126:     }
                   1127:     return $result;
1.11      albertel 1128: }
                   1129: 
                   1130: sub end_part {
1.159     albertel 1131:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1132:     &Apache::lonxml::debug("in end_part $target ");
                   1133:     my $status=$Apache::inputtags::status['-1'];
                   1134:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
                   1135:     my $result='';
                   1136:     if ( $target eq 'meta' ) {
                   1137: 	$result='';
1.249     albertel 1138:     } elsif ($target eq 'grade') {
                   1139: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
                   1140: 	    !$hidden) {
                   1141: 	    $result=&Apache::inputtags::grade;
                   1142: 	} else {
                   1143: 	    # move any submission data to .hidden
                   1144: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1145: 	}
1.159     albertel 1146:     } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
                   1147: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1148: 							$target);
1.212     albertel 1149: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1150: 	    $gradestatus='';
                   1151: 	}
1.159     albertel 1152: 	$result=$gradestatus;
1.265     sakharuk 1153: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1154:     } elsif ($target eq 'edit') {
                   1155: 	$result=&Apache::edit::end_table();
1.159     albertel 1156:     }
                   1157:     pop @Apache::inputtags::status;
                   1158:     $Apache::inputtags::part='';
                   1159:     return $result;
1.11      albertel 1160: }
1.1       albertel 1161: 
1.25      albertel 1162: sub start_preduedate {
1.159     albertel 1163:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1164:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
1.236     albertel 1165: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.159     albertel 1166: 	if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1167: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1168: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.159     albertel 1169: 	    &Apache::lonxml::get_all_text("/preduedate",$parser);
                   1170: 	}
1.24      albertel 1171:     }
1.159     albertel 1172:     return '';
1.24      albertel 1173: }
                   1174: 
1.25      albertel 1175: sub end_preduedate {
1.159     albertel 1176:     return '';
1.24      albertel 1177: }
                   1178: 
1.25      albertel 1179: sub start_postanswerdate {
1.159     albertel 1180:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.234     albertel 1181:     if ($target eq 'web' || $target eq 'grade') {
1.159     albertel 1182: 	if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
                   1183: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser);
                   1184: 	}
                   1185:     } elsif ($target eq 'tex') {
1.234     albertel 1186: 	&Apache::lonxml::get_all_text("/postanswerdate",$parser);
1.159     albertel 1187:     }
                   1188:     return '';
1.24      albertel 1189: }
                   1190: 
1.25      albertel 1191: sub end_postanswerdate {
1.159     albertel 1192:     return '';
1.24      albertel 1193: }
                   1194: 
1.25      albertel 1195: sub start_notsolved {
1.159     albertel 1196:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1197:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1198: 	$target eq 'tex') {
                   1199: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1200: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1201: 	if ($gradestatus =~ /^correct/ &&
                   1202: 	    &Apache::response::show_answer()) {
1.159     albertel 1203: 	    &Apache::lonxml::debug("skipping");
                   1204: 	    &Apache::lonxml::get_all_text("/notsolved",$parser);
                   1205: 	}
1.24      albertel 1206:     }
1.159     albertel 1207:     return '';
1.24      albertel 1208: }
                   1209: 
1.25      albertel 1210: sub end_notsolved {
1.159     albertel 1211:     return '';
1.24      albertel 1212: }
                   1213: 
                   1214: sub start_solved {
1.159     albertel 1215:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1216:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1217: 	$target eq 'tex') {
                   1218: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1219: 	if ($gradestatus !~ /^correct/ ||
                   1220: 	    !&Apache::response::show_answer()) {
1.159     albertel 1221: 	    &Apache::lonxml::get_all_text("/solved",$parser);
                   1222: 	}
1.24      albertel 1223:     }
1.159     albertel 1224:     return '';
1.24      albertel 1225: }
                   1226: 
                   1227: sub end_solved {
1.248     albertel 1228:     return '';
                   1229: }
                   1230: 
                   1231: sub start_problemtype {
                   1232:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1233:     my $result;
                   1234:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1235: 	$target eq 'tex' || $target eq 'analyze') {
                   1236: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1237: 	if (!defined($mode)) { $mode='show'; }
                   1238: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1239: 	my $found=0;
                   1240: 	foreach my $type (split(',',$for)) {
                   1241: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1242: 	}
                   1243: 	if ($mode eq 'show' && !$found) {
                   1244: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1245: 	}
                   1246: 	if ($mode eq 'hide' && $found) {
                   1247: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1248: 	}
                   1249:     } elsif ($target eq 'edit') {
                   1250: 	$result .=&Apache::edit::tag_start($target,$token);
                   1251: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1252: 					   [['show','Show'],
                   1253: 					    ['hide','Hide']]
                   1254: 					   ,$token);
                   1255: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1256: 					     [ ['exam','Exam/Quiz Problem'],
                   1257: 					       ['survey','Survey'],
                   1258: 					       ['problem','Homework Problem'] ]
                   1259: 					     ,$token);
                   1260: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1261:     } elsif ($target eq 'modified') {
                   1262: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1263: 						     $safeeval,'mode','for');
                   1264: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1265:     }
                   1266:     return $result;
                   1267: }
                   1268: 
                   1269: sub end_problemtype {
1.159     albertel 1270:     return '';
1.24      albertel 1271: }
1.34      albertel 1272: 
                   1273: sub start_startouttext {
1.159     albertel 1274:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1275:     my @result=(''.'');
                   1276:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1277:     return (@result);
1.34      albertel 1278: }
1.159     albertel 1279: 
1.34      albertel 1280: sub end_startouttext {
1.159     albertel 1281:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1282:     my $result='';
                   1283:     my $text='';
                   1284: 
                   1285:     if ($target eq 'edit') {
                   1286: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser);
1.211     albertel 1287: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1288: <td>".&mt('Delete:').
1.159     albertel 1289:                  &Apache::edit::deletelist($target,$token)
                   1290: 		 ."</td>
1.42      albertel 1291: <td>".
1.159     albertel 1292:                  &Apache::edit::insertlist($target,$token).
                   1293: 		 &Apache::edit::end_row().
                   1294:                  &Apache::edit::start_spanning_row()."\n"
1.188     bowersj2 1295: 		 . &Apache::loncommon::helpLatexCheatsheet () .
1.255     www      1296: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1297:     }
                   1298:     if ($target eq 'modified') {
1.219     albertel 1299: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1300:     }
                   1301:     if ($target eq 'tex') {
                   1302: 	$result .= '\noindent ';
                   1303:     }
                   1304:     return $result;
1.34      albertel 1305: }
1.159     albertel 1306: 
1.34      albertel 1307: sub start_endouttext {
1.159     albertel 1308:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1309:     my $result='';
                   1310:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1311:     if ($target eq "modified") {
                   1312: 	$result='<endouttext />'.
                   1313: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1314:     return $result;
1.34      albertel 1315: }
1.159     albertel 1316: 
1.34      albertel 1317: sub end_endouttext {
1.159     albertel 1318:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1319:     my @result=('','');
                   1320:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1321:     return (@result);
1.34      albertel 1322: }
1.159     albertel 1323: 
1.45      albertel 1324: sub delete_startouttext {
1.159     albertel 1325:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1326:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
                   1327:     my $text=$$parser['-1']->get_text("/endouttext");
                   1328:     my $ntoken=$$parser['-1']->get_token();
                   1329:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1330:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1331:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1332:     # they did the last time round
                   1333:     &Apache::lonxml::increasedepth($ntoken);
                   1334:     &Apache::lonxml::decreasedepth($ntoken);
                   1335:     return 1;
1.193     www      1336: }
                   1337: 
                   1338: sub start_simpleeditbutton {
                   1339:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1340:     my $result='';
                   1341:     if (($target eq 'web') &&
                   1342:         (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'}))) {
1.220     www      1343:         my $url=$ENV{'request.noversionuri'};
1.193     www      1344:         $url=~s/\?.*$//;
1.194     www      1345: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.211     albertel 1346:                 '<a href="'.$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      1347: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1348:     }
                   1349:     return $result;
                   1350: }
                   1351: 
                   1352: sub end_simpleeditbutton {
                   1353:     return '';
1.45      albertel 1354: }
1.34      albertel 1355: 
1.1       albertel 1356: 1;
                   1357: __END__

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