Annotation of loncom/homework/structuretags.pm, revision 1.225

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.225   ! albertel    4: # $Id: structuretags.pm,v 1.224 2003/11/05 21:43:11 www 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: #
1.33      albertel   28: # 2/19 Guy
1.44      ng         29: # 6/26/2001 fixed extra web display at end of <web></web> tags
1.60      www        30: # 8/17,8/18,8/20 Gerd Kortemeyer
1.54      www        31: 
1.133     sakharuk   32: 
1.1       albertel   33: package Apache::structuretags; 
                     34: 
                     35: use strict;
                     36: use Apache::lonnet;
1.101     sakharuk   37: use Apache::File();
1.147     www        38: use Apache::lonmenu;
1.210     albertel   39: use Apache::lonlocal;
1.1       albertel   40: 
1.78      harris41   41: BEGIN {
1.193     www        42:     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext',
1.197     www        43: 'simpleeditbutton','definetag'));
1.10      albertel   44: }
                     45: 
                     46: sub start_web {
1.159     albertel   47:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.200     albertel   48:     my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
                     49:     if ($target eq 'web') {
                     50: 	return $bodytext;
1.159     albertel   51:     }
                     52:     return '';
1.10      albertel   53: }
                     54: 
                     55: sub end_web {
1.44      ng         56:     return '';
1.10      albertel   57: }
                     58: 
                     59: sub start_tex {
1.159     albertel   60:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.198     sakharuk   61:     my $result='';
1.200     albertel   62:     my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
                     63:     if ($target eq 'tex') {
                     64: 	return $bodytext.' ';
1.159     albertel   65:     }
1.198     sakharuk   66:     return $result;;
1.10      albertel   67: }
                     68: 
                     69: sub end_tex {
1.44      ng         70:     return '';
1.9       albertel   71: }
                     72: 
1.48      albertel   73: sub page_start {
1.159     albertel   74:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                     75:     my %found;
1.207     albertel   76:     foreach my $taginside (@$tagstack) {
1.159     albertel   77: 	foreach my $taglookedfor ('html','body','form') {
                     78: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                     79: 	}
                     80:     }
                     81: 
                     82:     my $result;
                     83:     my $head_tag_start;
                     84:     if (!defined($found{'html'})) {
                     85: 	$result=&Apache::londefdef::start_html($target,$token,$tagstack,
                     86: 					       $parstack,$parser,$safeeval);
1.218     albertel   87: 	$head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target);
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: 	}
                    122:     }
                    123:     my $form_tag_start;
                    124:     if (!defined($found{'form'})) {
                    125: 	$form_tag_start='<form name="lonhomework" method="POST" action="'.
                    126: 	    $ENV{'request.uri'}.'">';
                    127:     }
                    128:     return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.105     albertel  129: }
                    130: 
1.141     matthew   131: #use Time::HiRes();
1.105     albertel  132: sub get_resource_name {
1.159     albertel  133:     my ($parstack,$safeeval)=@_;
1.204     albertel  134:     if (defined($Apache::lonhomework::name)) {
                    135: 	return $Apache::lonhomework::name;
                    136:     }
1.159     albertel  137:     my $name=&Apache::lonnet::gettitle();
                    138:     if ($name eq '') {
                    139: 	$name=&Apache::lonnet::EXT('resource.title');
                    140: 	if ($name eq 'con_lost') { $name = ''; }
                    141:     }
1.204     albertel  142:     if ($name!~/\S+/) {
                    143: 	$name=$ENV{'request.uri'};
1.205     albertel  144: 	$name=~s-.*/([^/]+)$-$1-;
1.204     albertel  145:     }
1.159     albertel  146:     $Apache::lonhomework::name=$name;
                    147:     return $name;
1.105     albertel  148: }
                    149: 
                    150: sub setup_rndseed {
1.159     albertel  151:     my ($safeeval)=@_;
                    152:     my $rndseed;
1.162     albertel  153:     my ($symb)=&Apache::lonxml::whichuser();
                    154:     if ($ENV{'request.state'} eq "construct" || $symb eq '') {
1.159     albertel  155: 	$rndseed=$ENV{'form.rndseed'};
                    156: 	if (!$rndseed) {
1.162     albertel  157: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    158: 	    if (!$rndseed) {
                    159: 		$rndseed=time;
                    160: 		$ENV{'form.rndseed'}=$rndseed;
                    161: 	    }
                    162: 	}
1.210     albertel  163: 	if ($ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
                    164: 	    $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  165: 	    srand(time);
                    166: 	    $rndseed=int(rand(2100000000));
1.159     albertel  167: 	    $ENV{'form.rndseed'}=$rndseed;
1.180     albertel  168: 	    delete($ENV{'form.resetdata'});
                    169: 	    delete($ENV{'form.newrandomization'});
1.159     albertel  170: 	}
1.187     albertel  171: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
                    172: 	   $rndseed=join(',',&Math::Random::random_seed_from_phrase($rndseed));
                    173:         }
1.221     albertel  174: 	if ($safeeval) {
                    175: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
                    176: 	    &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
                    177: 	}
1.159     albertel  178:     }
                    179:     return $rndseed;
1.105     albertel  180: }
                    181: 
                    182: sub problem_edit_header {
1.159     albertel  183:     return '<input type="hidden" name="submitted" value="edit" />
1.210     albertel  184:        <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
                    185:        <input type="submit" name="problemmode" value="'.&mt('Discard Edits and View').'" />
                    186:        <input type="submit" name="problemmode" value="'.&mt('EditXML').'" />
                    187:        <input type="submit" name="Undo" value="'.&mt('undo').'" /> <hr />
                    188:        <input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
                    189:        <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" /><br /><p>&nbsp;</p><table border="0"><tr><td bgcolor="#DDDDDD">
1.105     albertel  190:       ';
                    191: }
                    192: 
                    193: sub problem_edit_footer {
1.210     albertel  194:     return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
                    195:     <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />';
1.105     albertel  196: }
                    197: 
                    198: sub problem_web_to_edit_header {
1.159     albertel  199:     my ($rndseed)=@_;
1.210     albertel  200:     my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />
                    201:              <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
                    202:              <input type="submit" name="problemmode" value="'.&mt('EditXML').'" />
                    203:              <input type="submit" name="newrandomization" value="'.&mt('New Randomization').'" />
                    204:              <input type="submit" name="resetdata" value="'.&mt('Reset Submissions').'" />
                    205:              <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
1.175     albertel  206:               <input type="text" name="rndseed" width="10" value="'.
                    207: 	       $rndseed.'"
                    208:            onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
1.105     albertel  209:              <input type="checkbox" name="showallfoils" ';
1.159     albertel  210:     if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
1.210     albertel  211:     $result.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').'
1.105     albertel  212:              <hr />';
1.159     albertel  213:     my $numtoanalyze=$ENV{'form.numtoanalyze'};
1.176     albertel  214:     if (!$numtoanalyze) { $numtoanalyze=20; }
1.210     albertel  215:     $result.= '<input type="submit" name="problemmode" value='.
                    216: 	&mt('"Calculate answers').'" /> for
1.136     albertel  217:              <input type="text" name="numtoanalyze" value="'.
1.210     albertel  218: 	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
                    219: 	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
1.176     albertel  220: 						     '',undef,undef,300).
1.210     albertel  221: 						     '<hr />';
1.159     albertel  222:     return $result;
1.48      albertel  223: }
                    224: 
1.65      albertel  225: sub initialize_storage {
1.159     albertel  226:     %Apache::lonhomework::results=();
1.162     albertel  227:     %Apache::lonhomework::history=();
1.159     albertel  228:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.162     albertel  229:     if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
1.159     albertel  230: 	%Apache::lonhomework::history=
                    231: 	    &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
                    232: 	my ($temp)=keys %Apache::lonhomework::history ;
                    233: 	&Apache::lonxml::debug("Return message of $temp");
                    234:     } else {
                    235: 	%Apache::lonhomework::history=
                    236: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    237:     }
                    238:     #ignore error conditions
1.67      albertel  239:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  240:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  241: }
                    242: 
                    243: # -------------------------------------------------------------finalize_storage
                    244: # Stores away the result has to a student's environment
                    245: # checks form.grade_ for specific values, other wises stores
                    246: # to the running users environment
                    247: sub finalize_storage {
1.159     albertel  248:     my $result;
                    249:     my ($temp) = keys %Apache::lonhomework::results;
                    250:     if ( $temp ne '' ) {
                    251: 	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.162     albertel  252: 	if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
                    253: 	    $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
1.159     albertel  254: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
                    255: 					$ENV{'request.uri'},'',$domain,$name);
                    256: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    257: 	} else {
                    258: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    259: 					    $symb,$courseid,$domain,$name);
                    260: 	    &Apache::lonxml::debug('Store return message:'.$result);
                    261: 	}
1.67      albertel  262:     }
1.159     albertel  263:     return $result;
1.65      albertel  264: }
                    265: 
                    266: sub checkout_msg {
1.211     albertel  267:     my %lt=&Apache::lonlocal::texthash( 
                    268: 		'resource'=>'The resource needs to be checked out',
                    269: 		'id_expln'=>'As a resource gets checked out, a unique timestamped ID is given to it, and a permanent record is left in the system.',
                    270:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    271:                 'checkout'=>'Check out Exam for Viewing',
                    272: 		'checkout?'=>'Check out Exam?');
1.159     albertel  273:     return (<<ENDCHECKOUT);
1.211     albertel  274: <h2>$lt{'resource'}</h2>
                    275:     <p>$lt{'id_expln'}</p>
                    276: <font color="red">
                    277: <p>$lt{'warning'}</p>
1.91      albertel  278: </font>
                    279: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
                    280: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  281: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  282: </form>
                    283: ENDCHECKOUT
                    284: }
                    285: 
1.204     albertel  286: sub init_problem_globals {
                    287:     my ($type)=@_;
                    288:     #initialize globals
                    289:     if ($type eq 'problem') {
                    290: 	$Apache::inputtags::part='0';
                    291: 	@Apache::inputtags::partlist=('0');
                    292: 	$Apache::lonhomework::problemstatus=
                    293: 	    &Apache::lonnet::EXT('resource.0.problemstatus');
                    294:     } else {
                    295: 	$Apache::inputtags::part='';
                    296: 	@Apache::inputtags::partlist=();
                    297: 	$Apache::lonhomework::problemstatus='';	
                    298:     }
                    299:     @Apache::inputtags::responselist = ();
                    300:     @Apache::inputtags::importlist = ();
                    301:     @Apache::inputtags::previous=();
                    302:     @Apache::inputtags::previous_version=();
                    303:     $Apache::structuretags::printanswer='No';
                    304:     @Apache::structuretags::whileconds=();
                    305:     @Apache::structuretags::whilebody=();
                    306:     @Apache::structuretags::whileline=();
                    307:     $Apache::lonhomework::scantronmode=0;
                    308:     undef($Apache::lonhomework::name);
                    309: 
                    310: }
                    311: 
                    312: sub reset_problem_globals {
                    313:     my ($type)=@_;
                    314:     undef(%Apache::lonhomework::history);
                    315:     undef(%Apache::lonhomework::results);
                    316:     undef($Apache::inputtags::part);
1.208     albertel  317: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    318: #detect if we try to do 2 problems in one file
                    319: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  320:     undef($Apache::lonhomework::name);
                    321: }
                    322: 
1.9       albertel  323: sub start_problem {
1.159     albertel  324:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19      albertel  325: 
1.184     albertel  326:     if ( $Apache::inputtags::part ne '' ||
                    327: 	 $Apache::lonhomework::parsing_a_problem) {
                    328: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
                    329: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
1.159     albertel  330: 	return '';
                    331:     }
1.184     albertel  332: 
                    333:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  334:     &init_problem_globals('problem');
1.166     albertel  335: 
                    336:     if (defined($ENV{'scantron.maxquest'})) {
                    337: 	$Apache::lonhomework::scantronmode=1;
                    338:     }
1.161     albertel  339: 
1.159     albertel  340:     if ($target ne 'analyze') {
                    341: 	&initialize_storage();
                    342: 	if ($target eq 'web') {
                    343: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
                    344: 	}
                    345: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
                    346: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
                    347:     }
1.164     albertel  348:     if ($Apache::lonhomework::type eq '' ) {
1.159     albertel  349: 	my $uri=$ENV{'request.uri'};
                    350: 	if ($uri=~/\.(\w+)$/) {
                    351: 	    $Apache::lonhomework::type=$1;
                    352: 	    &Apache::lonxml::debug("Using type of $1");
                    353: 	} else {
                    354: 	    $Apache::lonhomework::type='problem';
                    355: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    356: 	}
1.87      albertel  357:     }
1.58      www       358: 
1.159     albertel  359:     #added vars to the scripting enviroment
1.213     albertel  360:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.24      albertel  361:     &Apache::run::run($expression,$safeeval);
1.159     albertel  362:     my $status;
                    363:     my $accessmsg;
                    364: 
                    365:     #should get back a <html> or the neccesary stuff to start XML/MathML
                    366:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    367: 	&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    368:     if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
                    369: 
                    370:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    371:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    372: 	$target eq 'tex') {
                    373: 	#handle exam checkout
                    374: 	if ($Apache::lonhomework::type eq 'exam') {
                    375: 	    my $token=
                    376: 		$Apache::lonhomework::history{"resource.0.outtoken"};
                    377: 	    if (($ENV{'form.doescheckout'}) && (!$token)) {
                    378: 		$token=&Apache::lonxml::maketoken();
                    379: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    380: 		    $token;
                    381: 	    }
                    382: 	    $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  383: 	}
1.159     albertel  384: 
                    385: 	#handle rand seed in construction space
                    386: 	my $rndseed=&setup_rndseed($safeeval);
1.162     albertel  387: 	my ($symb)=&Apache::lonxml::whichuser();
1.163     albertel  388: 	if ($ENV{'request.state'} ne "construct" && $symb eq '') {
1.162     albertel  389: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    390: 		$rndseed.'" />'.
                    391: 		    '<input type="submit" name="resetdata"
1.211     albertel  392:                              value="'.&mt('New Problem Variation').'" />'.
1.164     albertel  393: 		    '<input type="hidden" name="username"
1.185     albertel  394:                              value="'.$ENV{'form.username'}.'" /> <br />';
1.162     albertel  395: 	}
1.159     albertel  396: 	($status,$accessmsg) = &Apache::lonhomework::check_access('0');
                    397: 	push (@Apache::inputtags::status,$status);
                    398: 	my $expression='$external::datestatus="'.$status.'";';
                    399: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    400: 	&Apache::run::run($expression,$safeeval);
                    401: 	&Apache::lonxml::debug("Got $status");
                    402: 	if (( $status eq 'CLOSED' ) ||
                    403: 	    ( $status eq 'UNCHECKEDOUT') ||
                    404: 	    ( $status eq 'BANNED') ||
1.216     albertel  405: 	    ( $status eq 'UNAVAILABLE') ||
                    406: 	    ( $status eq 'INVALID_ACCESS')) {
1.159     albertel  407: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
                    408: 	    if ( $target eq "web" ) {
                    409: 		$result.= $head_tag_start.'</head>';
                    410: 		my $msg=$body_tag_start;
                    411: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  412: 		    $result.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.159     albertel  413: 		} else {
1.211     albertel  414: 		    $result.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  415: 		}
1.216     albertel  416: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.159     albertel  417: 		    $msg.='The problem '.$accessmsg;
                    418: 		} elsif ($status eq 'UNCHECKEDOUT') {
                    419: 		    $msg.=&checkout_msg;
                    420: 		}
                    421: 		$result.=$msg.'<br />';
                    422: 	    } elsif ($target eq 'tex') {
                    423: 		$result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
                    424: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  425: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  426: 		} else {
1.211     albertel  427: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  428: 		}
                    429: 	    }
                    430: 	} elsif ($target eq 'web') {
                    431: 	    my $name= &get_resource_name($parstack,$safeeval);
                    432: 	    if ($status eq 'CAN_ANSWER') {
                    433: 		# create a page header and exit
                    434: 		$result.="$head_tag_start<title>$name</title></head>
1.158     sakharuk  435:               $body_tag_start \n $form_tag_start".	
1.159     albertel  436: 		  '<input type="hidden" name="submitted" value="yes" />';
                    437: 		if ($ENV{'request.state'} eq "construct") {
1.187     albertel  438: 		    $result.= &problem_web_to_edit_header($ENV{'form.rndseed'});
1.159     albertel  439: 		}
                    440: 		# if we are viewing someone else preserve that info
                    441: 		if (defined $ENV{'form.grade_symb'}) {
                    442: 		    foreach my $field ('symb','courseid','domain','username') {
                    443: 			$result .= '<input type="hidden" name="grade_'.$field.
                    444: 			    '" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
                    445: 		    }
                    446: 		}
                    447: 	    } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER'
1.216     albertel  448: 		     || $status eq 'CLOSED' || $status eq 'UNAVALAILABLE' ||
                    449: 		     $status eq 'INVALID_ACCESS') {
1.159     albertel  450: 		$result.=$head_tag_start.
                    451: 		    "<title>$name</title></head>\n$body_tag_start\n";
                    452: 	    }
                    453: 	} elsif ($target eq 'tex') {
1.192     sakharuk  454: 	    my $startminipage = '';
1.191     sakharuk  455: 	    if (not $ENV{'form.problem_split'}=~/yes/) {
1.192     sakharuk  456: 		$startminipage = '\begin{minipage}{\textwidth}';
1.178     sakharuk  457: 	    }
1.159     albertel  458: 	    my $id = $Apache::inputtags::part;
                    459: 	    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.223     sakharuk  460: 	    my $packages=&Apache::lonnet::metadata($ENV{'request.uri'},'packages');
                    461: 	    my @packages = split /,/,$packages;
                    462: 	    my $allow_print_points = 0;
                    463: 	    foreach my $partial_key (@packages) {
                    464: 		if ($partial_key=~m/part_0/) {
                    465: 		    $allow_print_points=1;
1.159     albertel  466: 		}
                    467: 	    }
                    468: 	    my $duedate = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    469: 	    $duedate = POSIX::strftime("%c",localtime($duedate));
                    470: 	    my $temp_file;
                    471: 	    my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
                    472: 	    if (-e $filename) {
                    473: 		$temp_file = Apache::File->new($filename);
                    474: 	    } else {
                    475: 		$temp_file = Apache::File->new('>>'.$filename);
                    476: 	    }
                    477: 	    my @due_file_content = <$temp_file>;
                    478: 	    my $due_file_content = $due_file_content[$#due_file_content];
                    479: 	    chomp $due_file_content;
                    480: 	    my $name_of_resourse= &get_resource_name($parstack,$safeeval);
                    481: 	    if ($due_file_content ne $duedate) {
                    482: 		$temp_file = Apache::File->new('>'.$filename);
                    483: 		print $temp_file "$duedate\n";
                    484: 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
                    485: 		    if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
1.206     sakharuk  486: 			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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  487: 		    } else {
1.206     sakharuk  488: 			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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}{'.$name_of_resourse.'}';
1.159     albertel  489: 			if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    490: 		    }
1.104     sakharuk  491: 		} else {
1.159     albertel  492: 		    $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
1.104     sakharuk  493: 		}
1.101     sakharuk  494: 	    } else {
1.159     albertel  495: 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
1.206     sakharuk  496: 		    $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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}{'.$name_of_resourse.'}';	
1.159     albertel  497: 		    if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    498: 		} else {
                    499: 		    $result .= '\vskip 1mm \\\\\\\\';
                    500: 		}
                    501: 	    }
1.99      sakharuk  502: 	}
1.159     albertel  503:     } elsif ($target eq 'edit') {
                    504: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    505: 	    &problem_edit_header();
                    506: 	my $temp=&Apache::edit::insertlist($target,$token);
                    507: 	$result.=$temp;
                    508:     } elsif ($target eq 'modified') {
                    509: 	$result=$token->[4];
                    510: 	$result.=&Apache::edit::handle_insert();
                    511:     } else {
                    512: 	# page_start returned a starting result, delete it if we don't need it
                    513: 	$result = '';
1.99      sakharuk  514:     }
1.159     albertel  515:     return $result;
1.9       albertel  516: }
                    517: 
                    518: sub end_problem {
1.159     albertel  519:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    520:     my $result='';
                    521:     my $status=$Apache::inputtags::status['-1'];
                    522:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    523: 	$target eq 'tex') {
                    524: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
                    525: 	     $status eq 'CAN_ANSWER' ) {
                    526: 	    # if part is zero, no <part>s existed, so we need to the grading
                    527: 	    &Apache::inputtags::grade;
                    528: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    529: 		  $Apache::inputtags::part eq '0' &&
                    530: 		  $status ne 'UNCHECKEDOUT') {
                    531: 	    # if part is zero, no <part>s existed, so we need show the current
                    532: 	    # grading status
                    533: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    534: 	    $result.= $gradestatus;
                    535: 	}
                    536: 	if (
                    537: 	    (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
                    538: 	    ($target eq 'answer') || ($target eq 'tex')
                    539: 	   ) {
                    540: 	    if ($status eq 'CAN_ANSWER') {
1.172     albertel  541: 		if ($target ne 'tex' &&
                    542: 		    $ENV{'form.answer_output_mode'} ne 'tex') {
                    543: 		    $result.="</form></body>\n";
1.159     albertel  544: 		}
                    545: 	    } elsif ($status eq 'SHOW_ANSWER' || $status eq 'CANNOT_ANSWER' ||
1.216     albertel  546: 		    $status eq 'UNCHECKEDOUT' || $status eq 'INVALID_ACCESS') {
1.189     sakharuk  547: 		if ($target ne 'tex' &&
                    548: 		    $ENV{'form.answer_output_mode'} ne 'tex') {
1.159     albertel  549: 		    $result.="</body>\n";
                    550: 		}
                    551: 	    }
                    552: 	    if ($target eq 'web') {
                    553: 		$result.=&Apache::lonxml::xmlend();
                    554: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  555: 		my $endminipage = '';
1.191     sakharuk  556: 		if (not $ENV{'form.problem_split'}=~/yes/) {
1.178     sakharuk  557: 		    $endminipage = '\end{minipage}';
                    558: 		}
1.174     sakharuk  559: 		$result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.159     albertel  560: 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
1.178     sakharuk  561: 		    $result .= $endminipage.'\end{document} ';
1.159     albertel  562: 		} else {
                    563: 		    $result .= '';
                    564: 		}
                    565: 	    }
                    566: 	}
                    567: 	if ($target eq 'grade') {
                    568: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    569: 	    &finalize_storage();
                    570: 	}
1.172     albertel  571: 	if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
1.173     albertel  572: 	    && $ENV{'form.answer_output_mode'} ne 'tex') {
1.172     albertel  573: 	    $result.='</html>'; # normally we get it from xmlend, but in CSTR
                    574: 	                        # we always show answer mode too.
1.159     albertel  575: 	}
                    576:     } elsif ($target eq 'meta') {
                    577: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  578: 	    @Apache::inputtags::response=();
1.159     albertel  579: 	    $result=&Apache::response::mandatory_part_meta;
                    580: 	}
1.215     albertel  581: 	$result.=&Apache::response::meta_part_order();
1.159     albertel  582:     } elsif ($target eq 'edit') {
                    583: 	&Apache::lonxml::debug("in end_problem with $target, edit");
                    584: 	$result = &problem_edit_footer();
                    585:     }
1.155     albertel  586: 
1.177     albertel  587:     if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
                    588: 	&Apache::inputtags::check_for_duplicate_ids();
                    589:     }
1.204     albertel  590: 
                    591:     &reset_problem_globals('problem');
1.159     albertel  592: 
                    593:     return $result;
1.48      albertel  594: }
                    595: 
1.108     albertel  596: 
1.48      albertel  597: sub start_library {
1.159     albertel  598:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    599:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.204     albertel  600:     if ($$tagstack[0] eq 'library') { &init_problem_globals('library') };
1.159     albertel  601:     if ($target eq 'edit') {
                    602: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    603: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    604: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    605: 	    &problem_edit_header();
                    606: 	my $temp=&Apache::edit::insertlist($target,$token);
                    607: 	$result.=$temp;
                    608:     } elsif ($target eq 'modified') {
                    609: 	$result=$token->[4];
                    610: 	$result.=&Apache::edit::handle_insert();
                    611:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
                    612: 	     $ENV{'request.state'} eq "construct" ) {
                    613: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    614: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    615: 	my $name=&get_resource_name($parstack,$safeeval);
                    616: 	my $rndseed=&setup_rndseed($safeeval);
                    617: 	$result.="$head_tag_start<title>$name</title></head>
1.105     albertel  618:               $body_tag_start \n $form_tag_start".	
1.159     albertel  619: 		  '<input type="hidden" name="submitted" value="yes" />';
                    620: 	$result.=&problem_web_to_edit_header($rndseed);
                    621:     }
                    622:     return $result;
1.48      albertel  623: }
                    624: 
                    625: sub end_library {
1.159     albertel  626:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    627:     my $result='';
                    628:     if ($target eq 'edit') {
                    629: 	$result=&problem_edit_footer();
                    630:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
                    631: 	     $ENV{'request.state'} eq "construct") {
                    632: 	$result.='</form></body>'.&Apache::lonxml::xmlend();
                    633:     }
1.204     albertel  634:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel  635:     return $result;
1.197     www       636: }
                    637: 
                    638: sub start_definetag {
                    639:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    640: 
                    641:     my $result;
                    642: 
                    643:     my $name = $token->[2]->{'name'};
                    644:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
                    645:     if ($name=~/^\//) {
                    646: 	$result=
                    647:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                    648:     } else {
                    649: 	$result=
                    650:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                    651:     }
                    652:     $skip=~s/\</\&lt\;/gs;
                    653:     $skip=~s/\>/\&gt\;/gs;
                    654:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                    655:     return $result;
                    656: }
                    657: 
                    658: sub end_definetag {
                    659:     return '';
1.1       albertel  660: }
                    661: 
                    662: sub start_block {
1.201     albertel  663:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel  664: 
                    665:     my $result;
1.1       albertel  666: 
1.160     albertel  667:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.131     albertel  668: 	$target eq 'tex' || $target eq 'analyze') {
1.159     albertel  669: 	my $code = $token->[2]->{'condition'};
1.201     albertel  670: 	if (defined($code)) {
1.137     albertel  671: 	    if (!$Apache::lonxml::default_homework_loaded) {
                    672: 		&Apache::lonxml::default_homework_load($safeeval);
                    673: 	    }
1.131     albertel  674: 	    $result = &Apache::run::run($code,$safeeval);
                    675: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                    676: 	} else {
                    677: 	    $result='1';
                    678: 	}
                    679: 	if ( ! $result ) {
1.201     albertel  680: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel  681: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    682: 	}
                    683: 	$result='';
                    684:     } elsif ($target eq 'edit') {
                    685: 	$result .=&Apache::edit::tag_start($target,$token);
                    686: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                    687: 					  $token,40);
                    688: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    689:     } elsif ($target eq 'modified') {
                    690: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    691: 						     $safeeval,'condition');
                    692: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel  693:     }
1.131     albertel  694:     return $result;
1.1       albertel  695: }
                    696: 
                    697: sub end_block {
1.167     www       698:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    699:     my $result;
                    700:     if ($target eq "edit") {
                    701: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    702:     }
                    703:     return $result;
                    704: }
                    705: 
                    706: sub start_languageblock {
1.201     albertel  707:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www       708: 
                    709:     my $result;
                    710: 
                    711:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    712: 	$target eq 'tex' || $target eq 'analyze') {
1.201     albertel  713: 	my $include = $token->[2]->{'include'};
                    714: 	my $exclude = $token->[2]->{'exclude'};
                    715:         my %languages=&Apache::loncommon::display_languages();
                    716:         $result='1';
                    717: 	if ($include) {
                    718:             $result='';
                    719:             foreach (split(/\,/,$include)) {
                    720:                 if ($languages{$_}) { $result='1'; }
                    721:             }
                    722: 	}
                    723:         if ($exclude) {
                    724:             foreach (split(/\,/,$exclude)) {
                    725:                 if ($languages{$_}) { $result='0'; }
                    726:             }
                    727: 	}
                    728: 	if ( ! $result ) {
                    729: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                    730: 						   $style);
                    731: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    732: 	}
                    733: 	$result='';
1.167     www       734:     } elsif ($target eq 'edit') {
                    735: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel  736: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www       737: 					  $token,40);
1.211     albertel  738: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www       739: 					  $token,40);
                    740: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    741:     } elsif ($target eq 'modified') {
                    742: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel  743: 						     $safeeval,'include',
                    744: 						     'exclude');
1.167     www       745: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                    746:     }
                    747:     return $result;
                    748: }
                    749: 
                    750: sub end_languageblock {
1.170     www       751:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    752:     my $result;
1.201     albertel  753:     if ($target eq "edit") {
1.170     www       754: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    755:     }
                    756:     return $result;
                    757: }
                    758: 
                    759: sub start_instructorcomment {
1.201     albertel  760:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www       761: 
                    762:     my $result;
                    763: 
                    764:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    765: 	$target eq 'tex' || $target eq 'analyze') {
                    766:         $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
                    767: 	if ( ! $result ) {
1.201     albertel  768: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                    769: 						   $parser,$style);
1.170     www       770: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    771: 	}
                    772: 	$result='';
                    773:     } elsif ($target eq 'edit') {
                    774: 	$result .=&Apache::edit::tag_start($target,$token);
                    775: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    776:     }
                    777:     return $result;
                    778: }
                    779: 
                    780: sub end_instructorcomment {
1.159     albertel  781:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel  782:     my $result;
                    783:     if ($target eq "edit") {
                    784: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    785:     }
                    786:     return $result;
1.4       tsai      787: }
                    788: 
                    789: sub start_while {
1.159     albertel  790:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    791: 
1.160     albertel  792:     my $result;
1.161     albertel  793:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.160     albertel  794: 	$target eq 'tex' || $target eq 'analyze') {
                    795: 	my $code = $token->[2]->{'condition'};
1.4       tsai      796: 
1.160     albertel  797: 	push( @Apache::structuretags::whileconds, $code);
                    798: 	if (!$Apache::lonxml::default_homework_loaded) {
                    799: 	    &Apache::lonxml::default_homework_load($safeeval);
                    800: 	}
                    801: 	my $result = &Apache::run::run($code,$safeeval);
1.161     albertel  802: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
1.160     albertel  803: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel  804: 	push( @Apache::structuretags::whileline, $token->[5]);
                    805: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel  806: 	if ( $result ) {
                    807: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                    808: 	}
                    809:     } elsif ($target eq 'edit') {
                    810: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel  811: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel  812: 					  $token,40);
                    813: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    814:     } elsif ($target eq 'modified') {
                    815: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    816: 						     $safeeval,'condition');
                    817: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel  818:     }
1.160     albertel  819:     return $result;
1.4       tsai      820: }
                    821: 
                    822: sub end_while {
1.159     albertel  823:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel  824:     my $result;
                    825: 
                    826:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    827: 	$target eq 'tex' || $target eq 'analyze') {
                    828: 	my $code = pop(@Apache::structuretags::whileconds);
                    829: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel  830: 	my $line = pop(@Apache::structuretags::whileline);
                    831: 	my $return = &Apache::run::run($code,$safeeval);
                    832: 	my $starttime=time;
                    833: 	my $error=0;
                    834: 	while ($return) {
                    835: 	    if (time-$starttime >
                    836: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
                    837: 		$return = 0; $error=1; next;
                    838: 	    }
                    839: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                    840: 	    $return = &Apache::run::run($code,$safeeval);
                    841: 	}
                    842: 	if ($error) {
1.211     albertel  843: 	    &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  844: 	}
                    845:     } elsif ($target eq "edit") {
                    846: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel  847:     }
1.160     albertel  848:     return $result;
1.1       albertel  849: }
1.6       tsai      850: 
1.160     albertel  851: # <randomlist show="1">
1.6       tsai      852: #  <tag1>..</tag1>
                    853: #  <tag2>..</tag2>
                    854: #  <tag3>..</tag3>
1.160     albertel  855: #  ...
1.6       tsai      856: # </randomlist>
                    857: sub start_randomlist {
1.159     albertel  858:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    859:     my $result;
                    860:     if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
                    861: 	$target eq 'tex' || $target eq 'analyze') {
                    862: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
                    863: 	my $b_parser= HTML::TokeParser->new(\$body);
                    864: 	my $b_tok;
                    865: 	my @randomlist;
                    866: 	my $list_item;
                    867: 	while($b_tok = $b_parser->get_token() ) {
                    868: 	    if($b_tok->[0] eq 'S') { # start tag
                    869: 		# get content of the tag until matching end tag
                    870: 		# get all text upto the matching tag
                    871: 		# and push the content into @randomlist
                    872: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                    873: 							   $b_parser);
                    874: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                    875: 		push(@randomlist,$list_item);
                    876: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                    877:                 #         $list_item</b>";
                    878: 	    }
                    879: 	    if($b_tok->[0] eq 'T') { # text
                    880: 		# what to do with text in between tags?
                    881: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                    882: 	    }
                    883: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                    884: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                    885: 	    # }
                    886: 	}
                    887: 	my @idx_arr = (0 .. $#randomlist);
                    888: 	&Apache::structuretags::shuffle(\@idx_arr);
                    889: 	my $bodytext = '';
                    890: 	my $show=$#randomlist;
                    891: 	my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                    892: 	$showarg--;
                    893: 	if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                    894: 	for(0 .. $show) {
                    895: 	    $bodytext .= "$randomlist[ $idx_arr[$_] ]";
                    896: 	}
                    897: 	&Apache::lonxml::newparser($parser,\$bodytext);
                    898:     } elsif ($target eq 'edit' ) {
                    899: 	$result .=&Apache::edit::tag_start($target,$token);
                    900: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                    901: 					   $token,5);
                    902: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    903:     } elsif ($target eq 'modified' ) {
                    904: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    905: 						     $safeeval,'show');
                    906: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                    907:     }
                    908:     return $result;
1.7       tsai      909: }
                    910: 
                    911: sub shuffle {
                    912:     my $a=shift;
                    913:     my $i;
1.70      albertel  914:     if (defined(@$a)) {
1.159     albertel  915: 	&Apache::response::setrandomnumber();
                    916: 	for($i=@$a;--$i;) {
                    917: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                    918: 	    next if $i == $j;
                    919: 	    @$a[$i,$j] = @$a[$j,$i];
                    920: 	}
1.7       tsai      921:     }
1.6       tsai      922: }
                    923: 
                    924: sub end_randomlist {
1.159     albertel  925:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    926:     my $result;
                    927:     if ($target eq 'edit' ) {
                    928: 	$result=&Apache::edit::tag_end($target,$token,
                    929: 				       'End Randomly Parsed Block');
                    930:     }
                    931:     return $result;
1.6       tsai      932: }
                    933: 
1.11      albertel  934: sub start_part {
1.159     albertel  935:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    936:     my $result='';
                    937:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
                    938:     if ($id eq '') { $id = $Apache::lonxml::curdepth; }
                    939:     $Apache::inputtags::part=$id;
1.177     albertel  940:     push(@Apache::inputtags::partlist,$id);
                    941:     @Apache::inputtags::response=();
1.159     albertel  942:     @Apache::inputtags::previous=();
                    943:     @Apache::inputtags::previous_version=();
1.169     albertel  944:     $Apache::lonhomework::problemstatus=
                    945: 	&Apache::lonnet::EXT("resource.$id.problemstatus");
1.159     albertel  946:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.214     albertel  947:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.209     albertel  948:     &Apache::run::run($expression,$safeeval);
1.159     albertel  949: 
                    950:     if ($target eq 'meta') {
1.224     www       951: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                    952: 	return &Apache::response::mandatory_part_meta.
                    953: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel  954:     } elsif ($target eq 'web' || $target eq 'grade' ||
                    955: 	     $target eq 'answer' || $target eq 'tex') {
                    956: 	if ($hidden) {
                    957: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                    958: 	} else {
                    959: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                    960: 	    push (@Apache::inputtags::status,$status);
                    961: 	    my $expression='$external::datestatus="'.$status.'";';
                    962: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                    963: 	    &Apache::run::run($expression,$safeeval);
1.216     albertel  964: 	    if (( $status eq 'CLOSED' ) ||
                    965: 		( $status eq 'UNCHECKEDOUT') ||
                    966: 		( $status eq 'BANNED') ||
                    967: 		( $status eq 'UNAVAILABLE') ||
                    968: 		( $status eq 'INVALID_ACCESS')) {
1.159     albertel  969: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                    970: 		if ( $target eq "web" ) {
1.211     albertel  971: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel  972: 		} elsif ( $target eq 'tex' ) {
1.195     sakharuk  973: 		    if (not $ENV{'form.problem_split'}=~/yes/) {
1.211     albertel  974: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk  975: 		    } else {
1.211     albertel  976: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk  977: 		    }
1.159     albertel  978: 		}
                    979: 	    } else {
                    980: 		if ($target eq 'tex') {
1.195     sakharuk  981: 		    if (not $ENV{'form.problem_split'}=~/yes/) {
                    982: 			$result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                    983: 		    }
1.159     albertel  984: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.222     sakharuk  985: 		    my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'keys');
                    986: 		    my @allkeys = split /,/,$allkeys;
                    987: 		    my $allow_print_points = 0;
                    988: 		    foreach my $partial_key (@allkeys) {
                    989: 			if ($partial_key=~m/\_(\d*)\_weight/) {
                    990: 			    if ($1 ne '0') {$allow_print_points=1;}
                    991: 			}
                    992: 		    }
                    993: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.159     albertel  994: 		}
                    995: 	    }
                    996: 	}
                    997:     } elsif ($target eq 'edit') {
                    998: 	$result.=&Apache::edit::tag_start($target,$token);
                    999: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1000: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1001: 	    '&nbsp;&nbsp;'.
                   1002: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1003: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1004:     } elsif ($target eq 'modified') {
                   1005: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225   ! albertel 1006: 						     $safeeval,'id','display');
1.159     albertel 1007: 	if ($constructtag) {
1.225   ! albertel 1008: 	    #limiting ids to only letters numbers, and space
1.224     www      1009: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1010: 	    $result = &Apache::edit::rebuild_tag($token);
                   1011: 	    $result.=&Apache::edit::handle_insert();
                   1012: 	}
                   1013:     }
                   1014:     return $result;
1.11      albertel 1015: }
                   1016: 
                   1017: sub end_part {
1.159     albertel 1018:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1019:     &Apache::lonxml::debug("in end_part $target ");
                   1020:     my $status=$Apache::inputtags::status['-1'];
                   1021:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
                   1022:     my $result='';
                   1023:     if ( $target eq 'meta' ) {
                   1024: 	$result='';
                   1025:     } elsif ( $target eq 'grade' && $status eq 'CAN_ANSWER' && !$hidden) {
                   1026: 	$result=&Apache::inputtags::grade;
                   1027:     } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
                   1028: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1029: 							$target);
1.212     albertel 1030: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1031: 	    $gradestatus='';
                   1032: 	}
1.159     albertel 1033: 	$result=$gradestatus;
1.181     albertel 1034:     } elsif ($target eq 'edit') {
                   1035: 	$result=&Apache::edit::end_table();
1.159     albertel 1036:     }
                   1037:     pop @Apache::inputtags::status;
                   1038:     $Apache::inputtags::part='';
                   1039:     return $result;
1.11      albertel 1040: }
1.1       albertel 1041: 
1.25      albertel 1042: sub start_preduedate {
1.159     albertel 1043:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1044:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
                   1045: 	if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
                   1046: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER' &&
                   1047: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
                   1048: 	    &Apache::lonxml::get_all_text("/preduedate",$parser);
                   1049: 	}
1.24      albertel 1050:     }
1.159     albertel 1051:     return '';
1.24      albertel 1052: }
                   1053: 
1.25      albertel 1054: sub end_preduedate {
1.159     albertel 1055:     return '';
1.24      albertel 1056: }
                   1057: 
1.25      albertel 1058: sub start_postanswerdate {
1.159     albertel 1059:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1060:     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex') {
                   1061: 	if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
                   1062: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser);
                   1063: 	}
                   1064:     } elsif ($target eq 'tex') {
                   1065: 	return '\vskip 0 mm \noindent';
                   1066:     }
                   1067:     return '';
1.24      albertel 1068: }
                   1069: 
1.25      albertel 1070: sub end_postanswerdate {
1.159     albertel 1071:     return '';
1.24      albertel 1072: }
                   1073: 
1.25      albertel 1074: sub start_notsolved {
1.159     albertel 1075:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1076:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1077: 	$target eq 'tex') {
                   1078: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1079: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
                   1080: 	if ($gradestatus =~ /^correct/) {
                   1081: 	    &Apache::lonxml::debug("skipping");
                   1082: 	    &Apache::lonxml::get_all_text("/notsolved",$parser);
                   1083: 	}
1.24      albertel 1084:     }
1.159     albertel 1085:     return '';
1.24      albertel 1086: }
                   1087: 
1.25      albertel 1088: sub end_notsolved {
1.159     albertel 1089:     return '';
1.24      albertel 1090: }
                   1091: 
                   1092: sub start_solved {
1.159     albertel 1093:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1094:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1095: 	$target eq 'tex') {
                   1096: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1097: 	if ($gradestatus !~ /^correct/) {
                   1098: 	    &Apache::lonxml::get_all_text("/solved",$parser);
                   1099: 	}
1.24      albertel 1100:     }
1.159     albertel 1101:     return '';
1.24      albertel 1102: }
                   1103: 
                   1104: sub end_solved {
1.159     albertel 1105:     return '';
1.24      albertel 1106: }
1.34      albertel 1107: 
                   1108: sub start_startouttext {
1.159     albertel 1109:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1110:     my @result=(''.'');
                   1111:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1112:     return (@result);
1.34      albertel 1113: }
1.159     albertel 1114: 
1.34      albertel 1115: sub end_startouttext {
1.159     albertel 1116:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1117:     my $result='';
                   1118:     my $text='';
                   1119: 
                   1120:     if ($target eq 'edit') {
                   1121: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser);
1.211     albertel 1122: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1123: <td>".&mt('Delete:').
1.159     albertel 1124:                  &Apache::edit::deletelist($target,$token)
                   1125: 		 ."</td>
1.42      albertel 1126: <td>".
1.159     albertel 1127:                  &Apache::edit::insertlist($target,$token).
                   1128: 		 &Apache::edit::end_row().
                   1129:                  &Apache::edit::start_spanning_row()."\n"
1.188     bowersj2 1130: 		 . &Apache::loncommon::helpLatexCheatsheet () .
1.159     albertel 1131: 		 &Apache::edit::editfield($token->[1],$text,"",80,4);
                   1132:     }
                   1133:     if ($target eq 'modified') {
1.219     albertel 1134: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1135:     }
                   1136:     if ($target eq 'tex') {
                   1137: 	$result .= '\noindent ';
                   1138:     }
                   1139:     return $result;
1.34      albertel 1140: }
1.159     albertel 1141: 
1.34      albertel 1142: sub start_endouttext {
1.159     albertel 1143:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1144:     my $result='';
                   1145:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1146:     if ($target eq "modified") {
                   1147: 	$result='<endouttext />'.
                   1148: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1149:     return $result;
1.34      albertel 1150: }
1.159     albertel 1151: 
1.34      albertel 1152: sub end_endouttext {
1.159     albertel 1153:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1154:     my @result=('','');
                   1155:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1156:     return (@result);
1.34      albertel 1157: }
1.159     albertel 1158: 
1.45      albertel 1159: sub delete_startouttext {
1.159     albertel 1160:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1161:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
                   1162:     my $text=$$parser['-1']->get_text("/endouttext");
                   1163:     my $ntoken=$$parser['-1']->get_token();
                   1164:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1165:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1166:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1167:     # they did the last time round
                   1168:     &Apache::lonxml::increasedepth($ntoken);
                   1169:     &Apache::lonxml::decreasedepth($ntoken);
                   1170:     return 1;
1.193     www      1171: }
                   1172: 
                   1173: sub start_simpleeditbutton {
                   1174:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1175:     my $result='';
                   1176:     if (($target eq 'web') &&
                   1177:         (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'}))) {
1.220     www      1178:         my $url=$ENV{'request.noversionuri'};
1.193     www      1179:         $url=~s/\?.*$//;
1.194     www      1180: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.211     albertel 1181:                 '<a href="'.$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      1182: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1183:     }
                   1184:     return $result;
                   1185: }
                   1186: 
                   1187: sub end_simpleeditbutton {
                   1188:     return '';
1.45      albertel 1189: }
1.34      albertel 1190: 
1.1       albertel 1191: 1;
                   1192: __END__

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