Annotation of loncom/homework/structuretags.pm, revision 1.264

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.264   ! sakharuk    4: # $Id: structuretags.pm,v 1.263 2004/08/10 18:25:53 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');
1.241     albertel  357: 
                    358: 	$Apache::lonhomework::problemstatus=&get_problem_status('0')
1.204     albertel  359:     } else {
                    360: 	$Apache::inputtags::part='';
                    361: 	@Apache::inputtags::partlist=();
                    362: 	$Apache::lonhomework::problemstatus='';	
                    363:     }
                    364:     @Apache::inputtags::responselist = ();
                    365:     @Apache::inputtags::importlist = ();
                    366:     @Apache::inputtags::previous=();
                    367:     @Apache::inputtags::previous_version=();
                    368:     $Apache::structuretags::printanswer='No';
                    369:     @Apache::structuretags::whileconds=();
                    370:     @Apache::structuretags::whilebody=();
                    371:     @Apache::structuretags::whileline=();
                    372:     $Apache::lonhomework::scantronmode=0;
                    373:     undef($Apache::lonhomework::name);
                    374: 
                    375: }
                    376: 
                    377: sub reset_problem_globals {
                    378:     my ($type)=@_;
                    379:     undef(%Apache::lonhomework::history);
                    380:     undef(%Apache::lonhomework::results);
                    381:     undef($Apache::inputtags::part);
1.208     albertel  382: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    383: #detect if we try to do 2 problems in one file
                    384: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  385:     undef($Apache::lonhomework::name);
                    386: }
                    387: 
1.241     albertel  388: sub set_problem_state {
1.240     albertel  389:     my ($part)=@_;
                    390:     if ($ENV{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
                    391: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    392: 	    'correct_by_student';
                    393:     }
                    394: }
                    395: 
1.241     albertel  396: sub get_problem_status {
                    397:     my ($part)=@_;
                    398:     my $problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    399:     &Apache::lonxml::debug("problem status for $part is $problem_status");
                    400:     &Apache::lonxml::debug("env probstat is ".$ENV{'form.problemstatus'});
                    401:     if ($ENV{'request.state'} eq 'construct' &&
                    402: 	defined($ENV{'form.problemstatus'})) {
                    403: 	$problem_status=$ENV{'form.problemstatus'};
                    404:     }
                    405:     return $problem_status;
                    406: }
                    407: 
1.9       albertel  408: sub start_problem {
1.159     albertel  409:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19      albertel  410: 
1.184     albertel  411:     if ( $Apache::inputtags::part ne '' ||
                    412: 	 $Apache::lonhomework::parsing_a_problem) {
                    413: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
                    414: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
1.159     albertel  415: 	return '';
                    416:     }
1.184     albertel  417: 
                    418:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  419:     &init_problem_globals('problem');
1.166     albertel  420: 
                    421:     if (defined($ENV{'scantron.maxquest'})) {
                    422: 	$Apache::lonhomework::scantronmode=1;
                    423:     }
1.161     albertel  424: 
1.246     albertel  425:     &initialize_storage();
1.159     albertel  426:     if ($target ne 'analyze') {
                    427: 	if ($target eq 'web') {
                    428: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
1.238     albertel  429: 	}
1.241     albertel  430:        	if ($ENV{'request.state'} eq 'construct') { &set_problem_state('0'); }
1.159     albertel  431: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.237     albertel  432: 	if (($ENV{'request.state'} eq 'construct') &&
                    433: 	    defined($ENV{'form.problemtype'})) {
                    434: 	    $Apache::lonhomework::type=$ENV{'form.problemtype'};
                    435: 	}
1.240     albertel  436: 	&Apache::lonxml::debug("Found this to be of type :$Apache::ltonhomework::type:");
1.159     albertel  437:     }
1.164     albertel  438:     if ($Apache::lonhomework::type eq '' ) {
1.159     albertel  439: 	my $uri=$ENV{'request.uri'};
                    440: 	if ($uri=~/\.(\w+)$/) {
                    441: 	    $Apache::lonhomework::type=$1;
                    442: 	    &Apache::lonxml::debug("Using type of $1");
                    443: 	} else {
                    444: 	    $Apache::lonhomework::type='problem';
                    445: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    446: 	}
1.87      albertel  447:     }
1.58      www       448: 
1.159     albertel  449:     #added vars to the scripting enviroment
1.213     albertel  450:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  451:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  452:     &Apache::run::run($expression,$safeeval);
1.159     albertel  453:     my $status;
                    454:     my $accessmsg;
                    455: 
                    456:     #should get back a <html> or the neccesary stuff to start XML/MathML
                    457:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    458: 	&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    459:     if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
                    460: 
                    461:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    462:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    463: 	$target eq 'tex') {
                    464: 	#handle exam checkout
                    465: 	if ($Apache::lonhomework::type eq 'exam') {
                    466: 	    my $token=
                    467: 		$Apache::lonhomework::history{"resource.0.outtoken"};
                    468: 	    if (($ENV{'form.doescheckout'}) && (!$token)) {
                    469: 		$token=&Apache::lonxml::maketoken();
                    470: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    471: 		    $token;
                    472: 	    }
                    473: 	    $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  474: 	}
1.252     albertel  475: 	if ($ENV{'form.markaccess'}) {
                    476: 	    &Apache::lonnet::set_first_access('map');
                    477: 	}
1.159     albertel  478: 	#handle rand seed in construction space
                    479: 	my $rndseed=&setup_rndseed($safeeval);
1.162     albertel  480: 	my ($symb)=&Apache::lonxml::whichuser();
1.163     albertel  481: 	if ($ENV{'request.state'} ne "construct" && $symb eq '') {
1.162     albertel  482: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    483: 		$rndseed.'" />'.
                    484: 		    '<input type="submit" name="resetdata"
1.211     albertel  485:                              value="'.&mt('New Problem Variation').'" />'.
1.164     albertel  486: 		    '<input type="hidden" name="username"
1.185     albertel  487:                              value="'.$ENV{'form.username'}.'" /> <br />';
1.162     albertel  488: 	}
1.159     albertel  489: 	($status,$accessmsg) = &Apache::lonhomework::check_access('0');
                    490: 	push (@Apache::inputtags::status,$status);
                    491: 	my $expression='$external::datestatus="'.$status.'";';
                    492: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    493: 	&Apache::run::run($expression,$safeeval);
                    494: 	&Apache::lonxml::debug("Got $status");
                    495: 	if (( $status eq 'CLOSED' ) ||
                    496: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  497: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  498: 	    ( $status eq 'BANNED') ||
1.216     albertel  499: 	    ( $status eq 'UNAVAILABLE') ||
                    500: 	    ( $status eq 'INVALID_ACCESS')) {
1.159     albertel  501: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
                    502: 	    if ( $target eq "web" ) {
                    503: 		$result.= $head_tag_start.'</head>';
                    504: 		my $msg=$body_tag_start;
                    505: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  506: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  507: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  508: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  509: 		}
1.216     albertel  510: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.159     albertel  511: 		    $msg.='The problem '.$accessmsg;
                    512: 		} elsif ($status eq 'UNCHECKEDOUT') {
                    513: 		    $msg.=&checkout_msg;
1.252     albertel  514: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  515: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.159     albertel  516: 		}
                    517: 		$result.=$msg.'<br />';
                    518: 	    } elsif ($target eq 'tex') {
                    519: 		$result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
                    520: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  521: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  522: 		} else {
1.211     albertel  523: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  524: 		}
                    525: 	    }
                    526: 	} elsif ($target eq 'web') {
                    527: 	    my $name= &get_resource_name($parstack,$safeeval);
1.227     albertel  528: 	    $result.="$head_tag_start<title>$name</title></head>
1.158     sakharuk  529:               $body_tag_start \n $form_tag_start".	
1.227     albertel  530: 	      '<input type="hidden" name="submitted" value="yes" />';
                    531: 	    # create a page header and exit
                    532: 	    if ($ENV{'request.state'} eq "construct") {
                    533: 		$result.= &problem_web_to_edit_header($ENV{'form.rndseed'});
                    534: 	    }
                    535: 	    # if we are viewing someone else preserve that info
                    536: 	    if (defined $ENV{'form.grade_symb'}) {
                    537: 		foreach my $field ('symb','courseid','domain','username') {
                    538: 		    $result .= '<input type="hidden" name="grade_'.$field.
                    539: 			'" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
1.159     albertel  540: 		}
                    541: 	    }
                    542: 	} elsif ($target eq 'tex') {
1.192     sakharuk  543: 	    my $startminipage = '';
1.191     sakharuk  544: 	    if (not $ENV{'form.problem_split'}=~/yes/) {
1.192     sakharuk  545: 		$startminipage = '\begin{minipage}{\textwidth}';
1.178     sakharuk  546: 	    }
1.159     albertel  547: 	    my $id = $Apache::inputtags::part;
                    548: 	    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.223     sakharuk  549: 	    my $packages=&Apache::lonnet::metadata($ENV{'request.uri'},'packages');
                    550: 	    my @packages = split /,/,$packages;
                    551: 	    my $allow_print_points = 0;
                    552: 	    foreach my $partial_key (@packages) {
1.230     albertel  553: 		if ($partial_key=~m/^part_0$/) {
1.223     sakharuk  554: 		    $allow_print_points=1;
1.159     albertel  555: 		}
                    556: 	    }
                    557: 	    my $duedate = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    558: 	    $duedate = POSIX::strftime("%c",localtime($duedate));
                    559: 	    my $temp_file;
                    560: 	    my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
                    561: 	    if (-e $filename) {
                    562: 		$temp_file = Apache::File->new($filename);
                    563: 	    } else {
                    564: 		$temp_file = Apache::File->new('>>'.$filename);
                    565: 	    }
                    566: 	    my @due_file_content = <$temp_file>;
                    567: 	    my $due_file_content = $due_file_content[$#due_file_content];
                    568: 	    chomp $due_file_content;
1.257     sakharuk  569: 	    my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
1.159     albertel  570: 	    if ($due_file_content ne $duedate) {
                    571: 		$temp_file = Apache::File->new('>'.$filename);
                    572: 		print $temp_file "$duedate\n";
                    573: 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
                    574: 		    if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
1.206     sakharuk  575: 			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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  576: 		    } else {
1.206     sakharuk  577: 			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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}{'.$name_of_resourse.'}';
1.159     albertel  578: 			if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    579: 		    }
1.104     sakharuk  580: 		} else {
1.159     albertel  581: 		    $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
1.104     sakharuk  582: 		}
1.101     sakharuk  583: 	    } else {
1.159     albertel  584: 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
1.206     sakharuk  585: 		    $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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}{'.$name_of_resourse.'}';	
1.159     albertel  586: 		    if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    587: 		} else {
                    588: 		    $result .= '\vskip 1mm \\\\\\\\';
                    589: 		}
                    590: 	    }
1.99      sakharuk  591: 	}
1.159     albertel  592:     } elsif ($target eq 'edit') {
                    593: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    594: 	    &problem_edit_header();
1.226     albertel  595: 	$Apache::lonxml::warnings_error_header=
                    596: 	    &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  597: 	my $temp=&Apache::edit::insertlist($target,$token);
                    598: 	$result.=$temp;
                    599:     } elsif ($target eq 'modified') {
                    600: 	$result=$token->[4];
                    601: 	$result.=&Apache::edit::handle_insert();
                    602:     } else {
                    603: 	# page_start returned a starting result, delete it if we don't need it
                    604: 	$result = '';
1.99      sakharuk  605:     }
1.159     albertel  606:     return $result;
1.9       albertel  607: }
                    608: 
                    609: sub end_problem {
1.159     albertel  610:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    611:     my $result='';
                    612:     my $status=$Apache::inputtags::status['-1'];
                    613:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    614: 	$target eq 'tex') {
1.249     albertel  615: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel  616: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel  617: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                    618: 		&Apache::inputtags::grade;
                    619: 	    } else {
                    620: 		# move any submission data to .hidden
                    621: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                    622: 	    }
1.159     albertel  623: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    624: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel  625: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel  626: 	    # if part is zero, no <part>s existed, so we need show the current
                    627: 	    # grading status
                    628: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    629: 	    $result.= $gradestatus;
                    630: 	}
                    631: 	if (
                    632: 	    (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
                    633: 	    ($target eq 'answer') || ($target eq 'tex')
                    634: 	   ) {
1.227     albertel  635: 	    if ($target ne 'tex' &&
                    636: 		$ENV{'form.answer_output_mode'} ne 'tex') {
1.254     www       637: 		$result.="</form>";
                    638: 		$result.=&Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields);
                    639: 		$result.="</body>\n";
1.159     albertel  640: 	    }
                    641: 	    if ($target eq 'web') {
                    642: 		$result.=&Apache::lonxml::xmlend();
                    643: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  644: 		my $endminipage = '';
1.191     sakharuk  645: 		if (not $ENV{'form.problem_split'}=~/yes/) {
1.178     sakharuk  646: 		    $endminipage = '\end{minipage}';
                    647: 		}
1.257     sakharuk  648:                 if ($ENV{'form.print_discussions'} eq 'yes') {
1.263     sakharuk  649: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.257     sakharuk  650: 		    $result=~s/<\/html>//;
1.159     albertel  651: 		} else {
1.262     sakharuk  652: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
                    653: 		    if (not $ENV{'request.symb'} =~ m/\.page_/) {
                    654: 			$result .= $endminipage.'\end{document} ';
                    655: 		    } else {
                    656: 			$result .= '';
                    657: 		    }
1.159     albertel  658: 		}
                    659: 	    }
                    660: 	}
                    661: 	if ($target eq 'grade') {
                    662: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    663: 	    &finalize_storage();
                    664: 	}
1.172     albertel  665: 	if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
1.173     albertel  666: 	    && $ENV{'form.answer_output_mode'} ne 'tex') {
1.172     albertel  667: 	    $result.='</html>'; # normally we get it from xmlend, but in CSTR
                    668: 	                        # we always show answer mode too.
1.159     albertel  669: 	}
                    670:     } elsif ($target eq 'meta') {
                    671: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  672: 	    @Apache::inputtags::response=();
1.159     albertel  673: 	    $result=&Apache::response::mandatory_part_meta;
                    674: 	}
1.215     albertel  675: 	$result.=&Apache::response::meta_part_order();
1.258     albertel  676: 	$result.=&Apache::response::meta_response_order();
1.159     albertel  677:     } elsif ($target eq 'edit') {
                    678: 	&Apache::lonxml::debug("in end_problem with $target, edit");
                    679: 	$result = &problem_edit_footer();
                    680:     }
1.155     albertel  681: 
1.177     albertel  682:     if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
                    683: 	&Apache::inputtags::check_for_duplicate_ids();
                    684:     }
1.204     albertel  685: 
                    686:     &reset_problem_globals('problem');
1.159     albertel  687: 
                    688:     return $result;
1.48      albertel  689: }
                    690: 
1.108     albertel  691: 
1.48      albertel  692: sub start_library {
1.159     albertel  693:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    694:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.244     albertel  695:     if ($$tagstack[0] eq 'library') {
                    696: 	&init_problem_globals('library');
                    697: 	$Apache::lonhomework::type='problem';
                    698:     }
1.159     albertel  699:     if ($target eq 'edit') {
                    700: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    701: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    702: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    703: 	    &problem_edit_header();
                    704: 	my $temp=&Apache::edit::insertlist($target,$token);
                    705: 	$result.=$temp;
                    706:     } elsif ($target eq 'modified') {
                    707: 	$result=$token->[4];
                    708: 	$result.=&Apache::edit::handle_insert();
                    709:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
                    710: 	     $ENV{'request.state'} eq "construct" ) {
                    711: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    712: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    713: 	my $name=&get_resource_name($parstack,$safeeval);
                    714: 	my $rndseed=&setup_rndseed($safeeval);
                    715: 	$result.="$head_tag_start<title>$name</title></head>
1.105     albertel  716:               $body_tag_start \n $form_tag_start".	
1.159     albertel  717: 		  '<input type="hidden" name="submitted" value="yes" />';
                    718: 	$result.=&problem_web_to_edit_header($rndseed);
                    719:     }
                    720:     return $result;
1.48      albertel  721: }
                    722: 
                    723: sub end_library {
1.159     albertel  724:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    725:     my $result='';
                    726:     if ($target eq 'edit') {
                    727: 	$result=&problem_edit_footer();
                    728:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
                    729: 	     $ENV{'request.state'} eq "construct") {
                    730: 	$result.='</form></body>'.&Apache::lonxml::xmlend();
                    731:     }
1.204     albertel  732:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel  733:     return $result;
1.197     www       734: }
                    735: 
                    736: sub start_definetag {
                    737:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    738: 
                    739:     my $result;
                    740: 
                    741:     my $name = $token->[2]->{'name'};
                    742:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
                    743:     if ($name=~/^\//) {
                    744: 	$result=
                    745:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                    746:     } else {
                    747: 	$result=
                    748:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                    749:     }
                    750:     $skip=~s/\</\&lt\;/gs;
                    751:     $skip=~s/\>/\&gt\;/gs;
                    752:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                    753:     return $result;
                    754: }
                    755: 
                    756: sub end_definetag {
                    757:     return '';
1.1       albertel  758: }
                    759: 
                    760: sub start_block {
1.201     albertel  761:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel  762: 
                    763:     my $result;
1.1       albertel  764: 
1.160     albertel  765:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.131     albertel  766: 	$target eq 'tex' || $target eq 'analyze') {
1.159     albertel  767: 	my $code = $token->[2]->{'condition'};
1.201     albertel  768: 	if (defined($code)) {
1.137     albertel  769: 	    if (!$Apache::lonxml::default_homework_loaded) {
                    770: 		&Apache::lonxml::default_homework_load($safeeval);
                    771: 	    }
1.131     albertel  772: 	    $result = &Apache::run::run($code,$safeeval);
                    773: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                    774: 	} else {
                    775: 	    $result='1';
                    776: 	}
                    777: 	if ( ! $result ) {
1.201     albertel  778: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel  779: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    780: 	}
                    781: 	$result='';
                    782:     } elsif ($target eq 'edit') {
                    783: 	$result .=&Apache::edit::tag_start($target,$token);
                    784: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                    785: 					  $token,40);
                    786: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    787:     } elsif ($target eq 'modified') {
                    788: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    789: 						     $safeeval,'condition');
                    790: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel  791:     }
1.131     albertel  792:     return $result;
1.1       albertel  793: }
                    794: 
                    795: sub end_block {
1.167     www       796:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    797:     my $result;
                    798:     if ($target eq "edit") {
                    799: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    800:     }
                    801:     return $result;
                    802: }
                    803: 
                    804: sub start_languageblock {
1.201     albertel  805:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www       806: 
                    807:     my $result;
                    808: 
                    809:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    810: 	$target eq 'tex' || $target eq 'analyze') {
1.201     albertel  811: 	my $include = $token->[2]->{'include'};
                    812: 	my $exclude = $token->[2]->{'exclude'};
                    813:         my %languages=&Apache::loncommon::display_languages();
                    814:         $result='1';
                    815: 	if ($include) {
                    816:             $result='';
                    817:             foreach (split(/\,/,$include)) {
                    818:                 if ($languages{$_}) { $result='1'; }
                    819:             }
                    820: 	}
                    821:         if ($exclude) {
                    822:             foreach (split(/\,/,$exclude)) {
                    823:                 if ($languages{$_}) { $result='0'; }
                    824:             }
                    825: 	}
                    826: 	if ( ! $result ) {
                    827: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                    828: 						   $style);
                    829: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    830: 	}
                    831: 	$result='';
1.167     www       832:     } elsif ($target eq 'edit') {
                    833: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel  834: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www       835: 					  $token,40);
1.211     albertel  836: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www       837: 					  $token,40);
                    838: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    839:     } elsif ($target eq 'modified') {
                    840: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel  841: 						     $safeeval,'include',
                    842: 						     'exclude');
1.167     www       843: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                    844:     }
                    845:     return $result;
                    846: }
                    847: 
                    848: sub end_languageblock {
1.170     www       849:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    850:     my $result;
1.201     albertel  851:     if ($target eq "edit") {
1.170     www       852: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    853:     }
                    854:     return $result;
                    855: }
                    856: 
                    857: sub start_instructorcomment {
1.201     albertel  858:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www       859: 
                    860:     my $result;
                    861: 
                    862:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    863: 	$target eq 'tex' || $target eq 'analyze') {
                    864:         $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
                    865: 	if ( ! $result ) {
1.201     albertel  866: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                    867: 						   $parser,$style);
1.170     www       868: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    869: 	}
                    870: 	$result='';
                    871:     } elsif ($target eq 'edit') {
                    872: 	$result .=&Apache::edit::tag_start($target,$token);
                    873: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    874:     }
                    875:     return $result;
                    876: }
                    877: 
                    878: sub end_instructorcomment {
1.159     albertel  879:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel  880:     my $result;
                    881:     if ($target eq "edit") {
                    882: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    883:     }
                    884:     return $result;
1.4       tsai      885: }
                    886: 
                    887: sub start_while {
1.159     albertel  888:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    889: 
1.160     albertel  890:     my $result;
1.161     albertel  891:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.160     albertel  892: 	$target eq 'tex' || $target eq 'analyze') {
                    893: 	my $code = $token->[2]->{'condition'};
1.4       tsai      894: 
1.160     albertel  895: 	push( @Apache::structuretags::whileconds, $code);
                    896: 	if (!$Apache::lonxml::default_homework_loaded) {
                    897: 	    &Apache::lonxml::default_homework_load($safeeval);
                    898: 	}
                    899: 	my $result = &Apache::run::run($code,$safeeval);
1.161     albertel  900: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
1.160     albertel  901: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel  902: 	push( @Apache::structuretags::whileline, $token->[5]);
                    903: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel  904: 	if ( $result ) {
                    905: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                    906: 	}
                    907:     } elsif ($target eq 'edit') {
                    908: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel  909: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel  910: 					  $token,40);
                    911: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    912:     } elsif ($target eq 'modified') {
                    913: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    914: 						     $safeeval,'condition');
                    915: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel  916:     }
1.160     albertel  917:     return $result;
1.4       tsai      918: }
                    919: 
                    920: sub end_while {
1.159     albertel  921:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel  922:     my $result;
                    923: 
                    924:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    925: 	$target eq 'tex' || $target eq 'analyze') {
                    926: 	my $code = pop(@Apache::structuretags::whileconds);
                    927: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel  928: 	my $line = pop(@Apache::structuretags::whileline);
                    929: 	my $return = &Apache::run::run($code,$safeeval);
                    930: 	my $starttime=time;
                    931: 	my $error=0;
                    932: 	while ($return) {
                    933: 	    if (time-$starttime >
                    934: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
                    935: 		$return = 0; $error=1; next;
                    936: 	    }
                    937: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                    938: 	    $return = &Apache::run::run($code,$safeeval);
                    939: 	}
                    940: 	if ($error) {
1.211     albertel  941: 	    &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  942: 	}
                    943:     } elsif ($target eq "edit") {
                    944: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel  945:     }
1.160     albertel  946:     return $result;
1.1       albertel  947: }
1.6       tsai      948: 
1.160     albertel  949: # <randomlist show="1">
1.6       tsai      950: #  <tag1>..</tag1>
                    951: #  <tag2>..</tag2>
                    952: #  <tag3>..</tag3>
1.160     albertel  953: #  ...
1.6       tsai      954: # </randomlist>
                    955: sub start_randomlist {
1.159     albertel  956:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    957:     my $result;
                    958:     if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
                    959: 	$target eq 'tex' || $target eq 'analyze') {
                    960: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
                    961: 	my $b_parser= HTML::TokeParser->new(\$body);
                    962: 	my $b_tok;
                    963: 	my @randomlist;
                    964: 	my $list_item;
                    965: 	while($b_tok = $b_parser->get_token() ) {
                    966: 	    if($b_tok->[0] eq 'S') { # start tag
                    967: 		# get content of the tag until matching end tag
                    968: 		# get all text upto the matching tag
                    969: 		# and push the content into @randomlist
                    970: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                    971: 							   $b_parser);
                    972: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                    973: 		push(@randomlist,$list_item);
                    974: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                    975:                 #         $list_item</b>";
                    976: 	    }
                    977: 	    if($b_tok->[0] eq 'T') { # text
                    978: 		# what to do with text in between tags?
                    979: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                    980: 	    }
                    981: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                    982: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                    983: 	    # }
                    984: 	}
                    985: 	my @idx_arr = (0 .. $#randomlist);
                    986: 	&Apache::structuretags::shuffle(\@idx_arr);
                    987: 	my $bodytext = '';
                    988: 	my $show=$#randomlist;
                    989: 	my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                    990: 	$showarg--;
                    991: 	if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                    992: 	for(0 .. $show) {
                    993: 	    $bodytext .= "$randomlist[ $idx_arr[$_] ]";
                    994: 	}
                    995: 	&Apache::lonxml::newparser($parser,\$bodytext);
                    996:     } elsif ($target eq 'edit' ) {
                    997: 	$result .=&Apache::edit::tag_start($target,$token);
                    998: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                    999: 					   $token,5);
                   1000: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1001:     } elsif ($target eq 'modified' ) {
                   1002: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1003: 						     $safeeval,'show');
                   1004: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1005:     }
                   1006:     return $result;
1.7       tsai     1007: }
                   1008: 
                   1009: sub shuffle {
                   1010:     my $a=shift;
                   1011:     my $i;
1.70      albertel 1012:     if (defined(@$a)) {
1.251     albertel 1013: 	&Apache::response::pushrandomnumber();
1.159     albertel 1014: 	for($i=@$a;--$i;) {
                   1015: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1016: 	    next if $i == $j;
                   1017: 	    @$a[$i,$j] = @$a[$j,$i];
                   1018: 	}
1.251     albertel 1019: 	&Apache::response::poprandomnumber();
1.7       tsai     1020:     }
1.6       tsai     1021: }
                   1022: 
                   1023: sub end_randomlist {
1.159     albertel 1024:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1025:     my $result;
                   1026:     if ($target eq 'edit' ) {
                   1027: 	$result=&Apache::edit::tag_end($target,$token,
                   1028: 				       'End Randomly Parsed Block');
                   1029:     }
                   1030:     return $result;
1.6       tsai     1031: }
                   1032: 
1.11      albertel 1033: sub start_part {
1.159     albertel 1034:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1035:     my $result='';
                   1036:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
                   1037:     if ($id eq '') { $id = $Apache::lonxml::curdepth; }
                   1038:     $Apache::inputtags::part=$id;
1.177     albertel 1039:     push(@Apache::inputtags::partlist,$id);
                   1040:     @Apache::inputtags::response=();
1.159     albertel 1041:     @Apache::inputtags::previous=();
                   1042:     @Apache::inputtags::previous_version=();
1.241     albertel 1043:     $Apache::lonhomework::problemstatus=&get_problem_status($id);
1.159     albertel 1044:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1045:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1046:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
                   1047: 
1.214     albertel 1048:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1049:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1050:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1051: 
                   1052:     if ($target eq 'meta') {
1.224     www      1053: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1054: 	return &Apache::response::mandatory_part_meta.
                   1055: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1056:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1057: 	     $target eq 'answer' || $target eq 'tex') {
                   1058: 	if ($hidden) {
                   1059: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1060: 	} else {
                   1061: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1062: 	    push (@Apache::inputtags::status,$status);
                   1063: 	    my $expression='$external::datestatus="'.$status.'";';
                   1064: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1065: 	    &Apache::run::run($expression,$safeeval);
1.240     albertel 1066: 	    if ($ENV{'request.state'} eq 'construct') {
1.241     albertel 1067: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1068: 	    }
1.216     albertel 1069: 	    if (( $status eq 'CLOSED' ) ||
                   1070: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1071: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1072: 		( $status eq 'BANNED') ||
                   1073: 		( $status eq 'UNAVAILABLE') ||
                   1074: 		( $status eq 'INVALID_ACCESS')) {
1.159     albertel 1075: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1076: 		if ( $target eq "web" ) {
1.211     albertel 1077: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1078: 		} elsif ( $target eq 'tex' ) {
1.195     sakharuk 1079: 		    if (not $ENV{'form.problem_split'}=~/yes/) {
1.211     albertel 1080: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1081: 		    } else {
1.211     albertel 1082: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1083: 		    }
1.159     albertel 1084: 		}
                   1085: 	    } else {
                   1086: 		if ($target eq 'tex') {
1.195     sakharuk 1087: 		    if (not $ENV{'form.problem_split'}=~/yes/) {
1.264   ! sakharuk 1088: 			if ($$tagstack[-2] eq 'td') {
        !          1089: 			    $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
        !          1090: 			} else {
        !          1091: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
        !          1092: 			}
1.195     sakharuk 1093: 		    }
1.159     albertel 1094: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.230     albertel 1095: 		    my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'packages');
1.222     sakharuk 1096: 		    my @allkeys = split /,/,$allkeys;
                   1097: 		    my $allow_print_points = 0;
                   1098: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1099: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1100: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1101: 			}
                   1102: 		    }
                   1103: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1104: 		} elsif ($target eq 'web') {
                   1105: 		    $result.='<a name="'.&Apache::lonnet::escape($Apache::inputtags::part).'" />';
1.159     albertel 1106: 		}
                   1107: 	    }
                   1108: 	}
                   1109:     } elsif ($target eq 'edit') {
                   1110: 	$result.=&Apache::edit::tag_start($target,$token);
                   1111: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1112: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1113: 	    '&nbsp;&nbsp;'.
                   1114: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1115: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1116:     } elsif ($target eq 'modified') {
                   1117: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1118: 						     $safeeval,'id','display');
1.159     albertel 1119: 	if ($constructtag) {
1.225     albertel 1120: 	    #limiting ids to only letters numbers, and space
1.224     www      1121: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1122: 	    $result = &Apache::edit::rebuild_tag($token);
                   1123: 	    $result.=&Apache::edit::handle_insert();
                   1124: 	}
                   1125:     }
                   1126:     return $result;
1.11      albertel 1127: }
                   1128: 
                   1129: sub end_part {
1.159     albertel 1130:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1131:     &Apache::lonxml::debug("in end_part $target ");
                   1132:     my $status=$Apache::inputtags::status['-1'];
                   1133:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
                   1134:     my $result='';
                   1135:     if ( $target eq 'meta' ) {
                   1136: 	$result='';
1.249     albertel 1137:     } elsif ($target eq 'grade') {
                   1138: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
                   1139: 	    !$hidden) {
                   1140: 	    $result=&Apache::inputtags::grade;
                   1141: 	} else {
                   1142: 	    # move any submission data to .hidden
                   1143: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1144: 	}
1.159     albertel 1145:     } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
                   1146: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1147: 							$target);
1.212     albertel 1148: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1149: 	    $gradestatus='';
                   1150: 	}
1.159     albertel 1151: 	$result=$gradestatus;
1.264   ! sakharuk 1152: 	if ($$tagstack[-2] eq 'td') {$result.='\end{minipage}';} 
1.181     albertel 1153:     } elsif ($target eq 'edit') {
                   1154: 	$result=&Apache::edit::end_table();
1.159     albertel 1155:     }
                   1156:     pop @Apache::inputtags::status;
                   1157:     $Apache::inputtags::part='';
                   1158:     return $result;
1.11      albertel 1159: }
1.1       albertel 1160: 
1.25      albertel 1161: sub start_preduedate {
1.159     albertel 1162:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1163:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
1.236     albertel 1164: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.159     albertel 1165: 	if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1166: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1167: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.159     albertel 1168: 	    &Apache::lonxml::get_all_text("/preduedate",$parser);
                   1169: 	}
1.24      albertel 1170:     }
1.159     albertel 1171:     return '';
1.24      albertel 1172: }
                   1173: 
1.25      albertel 1174: sub end_preduedate {
1.159     albertel 1175:     return '';
1.24      albertel 1176: }
                   1177: 
1.25      albertel 1178: sub start_postanswerdate {
1.159     albertel 1179:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.234     albertel 1180:     if ($target eq 'web' || $target eq 'grade') {
1.159     albertel 1181: 	if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
                   1182: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser);
                   1183: 	}
                   1184:     } elsif ($target eq 'tex') {
1.234     albertel 1185: 	&Apache::lonxml::get_all_text("/postanswerdate",$parser);
1.159     albertel 1186:     }
                   1187:     return '';
1.24      albertel 1188: }
                   1189: 
1.25      albertel 1190: sub end_postanswerdate {
1.159     albertel 1191:     return '';
1.24      albertel 1192: }
                   1193: 
1.25      albertel 1194: sub start_notsolved {
1.159     albertel 1195:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1196:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1197: 	$target eq 'tex') {
                   1198: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1199: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1200: 	if ($gradestatus =~ /^correct/ &&
                   1201: 	    &Apache::response::show_answer()) {
1.159     albertel 1202: 	    &Apache::lonxml::debug("skipping");
                   1203: 	    &Apache::lonxml::get_all_text("/notsolved",$parser);
                   1204: 	}
1.24      albertel 1205:     }
1.159     albertel 1206:     return '';
1.24      albertel 1207: }
                   1208: 
1.25      albertel 1209: sub end_notsolved {
1.159     albertel 1210:     return '';
1.24      albertel 1211: }
                   1212: 
                   1213: sub start_solved {
1.159     albertel 1214:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1215:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1216: 	$target eq 'tex') {
                   1217: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1218: 	if ($gradestatus !~ /^correct/ ||
                   1219: 	    !&Apache::response::show_answer()) {
1.159     albertel 1220: 	    &Apache::lonxml::get_all_text("/solved",$parser);
                   1221: 	}
1.24      albertel 1222:     }
1.159     albertel 1223:     return '';
1.24      albertel 1224: }
                   1225: 
                   1226: sub end_solved {
1.248     albertel 1227:     return '';
                   1228: }
                   1229: 
                   1230: sub start_problemtype {
                   1231:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1232:     my $result;
                   1233:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1234: 	$target eq 'tex' || $target eq 'analyze') {
                   1235: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1236: 	if (!defined($mode)) { $mode='show'; }
                   1237: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1238: 	my $found=0;
                   1239: 	foreach my $type (split(',',$for)) {
                   1240: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1241: 	}
                   1242: 	if ($mode eq 'show' && !$found) {
                   1243: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1244: 	}
                   1245: 	if ($mode eq 'hide' && $found) {
                   1246: 	    &Apache::lonxml::get_all_text("/problemtype",$parser);
                   1247: 	}
                   1248:     } elsif ($target eq 'edit') {
                   1249: 	$result .=&Apache::edit::tag_start($target,$token);
                   1250: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1251: 					   [['show','Show'],
                   1252: 					    ['hide','Hide']]
                   1253: 					   ,$token);
                   1254: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1255: 					     [ ['exam','Exam/Quiz Problem'],
                   1256: 					       ['survey','Survey'],
                   1257: 					       ['problem','Homework Problem'] ]
                   1258: 					     ,$token);
                   1259: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1260:     } elsif ($target eq 'modified') {
                   1261: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1262: 						     $safeeval,'mode','for');
                   1263: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1264:     }
                   1265:     return $result;
                   1266: }
                   1267: 
                   1268: sub end_problemtype {
1.159     albertel 1269:     return '';
1.24      albertel 1270: }
1.34      albertel 1271: 
                   1272: sub start_startouttext {
1.159     albertel 1273:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1274:     my @result=(''.'');
                   1275:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1276:     return (@result);
1.34      albertel 1277: }
1.159     albertel 1278: 
1.34      albertel 1279: sub end_startouttext {
1.159     albertel 1280:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1281:     my $result='';
                   1282:     my $text='';
                   1283: 
                   1284:     if ($target eq 'edit') {
                   1285: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser);
1.211     albertel 1286: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1287: <td>".&mt('Delete:').
1.159     albertel 1288:                  &Apache::edit::deletelist($target,$token)
                   1289: 		 ."</td>
1.42      albertel 1290: <td>".
1.159     albertel 1291:                  &Apache::edit::insertlist($target,$token).
                   1292: 		 &Apache::edit::end_row().
                   1293:                  &Apache::edit::start_spanning_row()."\n"
1.188     bowersj2 1294: 		 . &Apache::loncommon::helpLatexCheatsheet () .
1.255     www      1295: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1296:     }
                   1297:     if ($target eq 'modified') {
1.219     albertel 1298: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1299:     }
                   1300:     if ($target eq 'tex') {
                   1301: 	$result .= '\noindent ';
                   1302:     }
                   1303:     return $result;
1.34      albertel 1304: }
1.159     albertel 1305: 
1.34      albertel 1306: sub start_endouttext {
1.159     albertel 1307:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1308:     my $result='';
                   1309:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1310:     if ($target eq "modified") {
                   1311: 	$result='<endouttext />'.
                   1312: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1313:     return $result;
1.34      albertel 1314: }
1.159     albertel 1315: 
1.34      albertel 1316: sub end_endouttext {
1.159     albertel 1317:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1318:     my @result=('','');
                   1319:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1320:     return (@result);
1.34      albertel 1321: }
1.159     albertel 1322: 
1.45      albertel 1323: sub delete_startouttext {
1.159     albertel 1324:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1325:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
                   1326:     my $text=$$parser['-1']->get_text("/endouttext");
                   1327:     my $ntoken=$$parser['-1']->get_token();
                   1328:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1329:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1330:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1331:     # they did the last time round
                   1332:     &Apache::lonxml::increasedepth($ntoken);
                   1333:     &Apache::lonxml::decreasedepth($ntoken);
                   1334:     return 1;
1.193     www      1335: }
                   1336: 
                   1337: sub start_simpleeditbutton {
                   1338:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1339:     my $result='';
                   1340:     if (($target eq 'web') &&
                   1341:         (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'}))) {
1.220     www      1342:         my $url=$ENV{'request.noversionuri'};
1.193     www      1343:         $url=~s/\?.*$//;
1.194     www      1344: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.211     albertel 1345:                 '<a href="'.$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      1346: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1347:     }
                   1348:     return $result;
                   1349: }
                   1350: 
                   1351: sub end_simpleeditbutton {
                   1352:     return '';
1.45      albertel 1353: }
1.34      albertel 1354: 
1.1       albertel 1355: 1;
                   1356: __END__

FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>