Annotation of loncom/homework/structuretags.pm, revision 1.239

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.239   ! albertel    4: # $Id: structuretags.pm,v 1.238 2004/02/16 19:19:31 albertel Exp $
1.74      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.33      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;
1.231     sakharuk   40: use Apache::lonxml;
1.1       albertel   41: 
1.78      harris41   42: BEGIN {
1.193     www        43:     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','startouttext','endouttext',
1.197     www        44: 'simpleeditbutton','definetag'));
1.10      albertel   45: }
                     46: 
                     47: sub start_web {
1.159     albertel   48:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.200     albertel   49:     my $bodytext=&Apache::lonxml::get_all_text("/web",$parser);
                     50:     if ($target eq 'web') {
                     51: 	return $bodytext;
1.159     albertel   52:     }
                     53:     return '';
1.10      albertel   54: }
                     55: 
                     56: sub end_web {
1.44      ng         57:     return '';
1.10      albertel   58: }
                     59: 
                     60: sub start_tex {
1.159     albertel   61:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.198     sakharuk   62:     my $result='';
1.200     albertel   63:     my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser);
                     64:     if ($target eq 'tex') {
                     65: 	return $bodytext.' ';
1.159     albertel   66:     }
1.198     sakharuk   67:     return $result;;
1.10      albertel   68: }
                     69: 
                     70: sub end_tex {
1.44      ng         71:     return '';
1.9       albertel   72: }
                     73: 
1.48      albertel   74: sub page_start {
1.159     albertel   75:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                     76:     my %found;
1.207     albertel   77:     foreach my $taginside (@$tagstack) {
1.159     albertel   78: 	foreach my $taglookedfor ('html','body','form') {
                     79: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                     80: 	}
                     81:     }
                     82: 
                     83:     my $result;
                     84:     my $head_tag_start;
                     85:     if (!defined($found{'html'})) {
                     86: 	$result=&Apache::londefdef::start_html($target,$token,$tagstack,
                     87: 					       $parstack,$parser,$safeeval);
1.218     albertel   88: 	$head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target);
1.159     albertel   89:     }
                     90:     my $body_tag_start;
                     91:     if (!defined($found{'body'})) {
                     92: 	$body_tag_start='<body onLoad="'.&Apache::lonmenu::loadevents().'" '.
                     93: 	    'onUnload="'.&Apache::lonmenu::unloadevents().'" ';
                     94: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                     95: 						  $safeeval);
1.199     www        96: 	if ($ENV{'browser.imagesuppress'} eq 'on') { $background=''; }
1.159     albertel   97: 	if ($background) {
                     98: 	    $Apache::lonxml::extlinks[$#Apache::lonxml::extlinks+1]=
                     99: 		$background;
                    100: 	    $body_tag_start.='background="'.$background.'" ';
                    101: 	} else {
                    102: 	    my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    103: 						   $safeeval);
1.199     www       104: 	    if (($bgcolor) && ($ENV{'browser.blackwhite'} ne 'on')) {
1.159     albertel  105: 		$body_tag_start.='bgcolor="'.$bgcolor.'" ';
                    106: 	    } else {
                    107: 		$body_tag_start.='bgcolor="#ffffff"';
                    108: 	    }
1.199     www       109: 	}
                    110: 	if ($ENV{'browser.fontenhance'} eq 'on') {
                    111: 	    $body_tag_start.=' style="font-size: x-large;" ';
1.159     albertel  112: 	}
                    113: 	$body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
                    114: 	if ($target eq 'web' && $ENV{'request.state'} ne 'construct') {
1.165     albertel  115: 	    my ($symb,undef,undef,undef,$publicuser)=
                    116: 		&Apache::lonxml::whichuser();
                    117: 	    if ($symb eq '' && !$publicuser) {
1.159     albertel  118: 		my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
1.211     albertel  119: 		$help=&mt("Browsing resource, all submissions are temporary.")."<br />";
1.159     albertel  120: 		$body_tag_start.=$help;
                    121: 	    }
                    122: 	}
                    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();
                    155:     if ($ENV{'request.state'} eq "construct" || $symb eq '') {
1.159     albertel  156: 	$rndseed=$ENV{'form.rndseed'};
                    157: 	if (!$rndseed) {
1.162     albertel  158: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    159: 	    if (!$rndseed) {
                    160: 		$rndseed=time;
                    161: 	    }
1.237     albertel  162: 	    $ENV{'form.rndseed'}=$rndseed;
1.162     albertel  163: 	}
1.210     albertel  164: 	if ($ENV{'form.resetdata'} eq &mt('New Problem Variation') ||
                    165: 	    $ENV{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  166: 	    srand(time);
                    167: 	    $rndseed=int(rand(2100000000));
1.159     albertel  168: 	    $ENV{'form.rndseed'}=$rndseed;
1.180     albertel  169: 	    delete($ENV{'form.resetdata'});
                    170: 	    delete($ENV{'form.newrandomization'});
1.159     albertel  171: 	}
1.187     albertel  172: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
                    173: 	   $rndseed=join(',',&Math::Random::random_seed_from_phrase($rndseed));
                    174:         }
1.221     albertel  175: 	if ($safeeval) {
                    176: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
                    177: 	    &Apache::run::run('$external::randomseed='.$rndseed.';',$safeeval);
                    178: 	}
1.159     albertel  179:     }
                    180:     return $rndseed;
1.105     albertel  181: }
                    182: 
                    183: sub problem_edit_header {
1.159     albertel  184:     return '<input type="hidden" name="submitted" value="edit" />
1.210     albertel  185:        <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
                    186:        <input type="submit" name="problemmode" value="'.&mt('Discard Edits and View').'" />
                    187:        <input type="submit" name="problemmode" value="'.&mt('EditXML').'" />
                    188:        <input type="submit" name="Undo" value="'.&mt('undo').'" /> <hr />
                    189:        <input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
1.229     www       190:        <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
                    191:        &Apache::loncommon::help_open_topic('Problem_Editor_XML_Index',
                    192: 					   'Problem Editing Help').'</td><td>'.
                    193:        &Apache::loncommon::help_open_faq(5).
                    194:        &Apache::loncommon::help_open_bug('Authoring').'</td></tr></table>'.
1.228     www       195:        '<table border="0"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  196: }
                    197: 
                    198: sub problem_edit_footer {
1.210     albertel  199:     return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
                    200:     <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />';
1.105     albertel  201: }
                    202: 
1.235     albertel  203: sub option {
                    204:     my ($value,$name) = @_;
                    205:     my $result ="<option value='".$value."' ";
                    206:     if ($ENV{'form.'.$name} eq $value) {
                    207: 	$result.=" selected='on' ";
                    208:     }
                    209:     $result.='>';
                    210:     return $result;
                    211: }
                    212: 
1.105     albertel  213: sub problem_web_to_edit_header {
1.159     albertel  214:     my ($rndseed)=@_;
1.210     albertel  215:     my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />
                    216:              <input type="submit" name="problemmode" value="'.&mt('Edit').'" />
                    217:              <input type="submit" name="problemmode" value="'.&mt('EditXML').'" />
                    218:              <input type="submit" name="newrandomization" value="'.&mt('New Randomization').'" />
                    219:              <input type="submit" name="resetdata" value="'.&mt('Reset Submissions').'" />
                    220:              <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
1.175     albertel  221:               <input type="text" name="rndseed" width="10" value="'.
                    222: 	       $rndseed.'"
                    223:            onChange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
1.105     albertel  224:              <input type="checkbox" name="showallfoils" ';
1.159     albertel  225:     if (defined($ENV{'form.showallfoils'})) { $result.='checked="on"'; }
1.228     www       226:     $result.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    227: 	&Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
                    228: 	'<hr />';
1.235     albertel  229:     $result.="
                    230: <nobr>
                    231: Problem Status:
                    232: <select name='problemstate'>
                    233:   <option name=''></option>
                    234:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    235:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    236:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    237:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    238:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    239: </select>
                    240: </nobr>
                    241: <nobr>
                    242: Problem Type:
                    243: <select name='problemtype'>
                    244:   <option name=''></option>
                    245:   ".&option('exam'   ,'problemtype')."Exam Problem</option>
                    246:   ".&option('problem','problemtype')."Homework problem</option>
                    247:   ".&option('survey' ,'problemtype')."Survey Question</option>
                    248: </select>
                    249: </nobr>
                    250: <nobr>
                    251: Feedback Mode:
                    252: <select name='problemstatus'>
                    253:   <option value=''></option>
                    254:   ".&option('yes','problemstatus')."Show Feedback</option>
                    255:   ".&option('no', 'problemstatus')."Don\'t Show Feedback</option>
                    256: </select>
                    257: <input type='submit' name='changeproblemmode' value='Change' />
                    258: </nobr>
                    259: <hr />";
1.159     albertel  260:     my $numtoanalyze=$ENV{'form.numtoanalyze'};
1.176     albertel  261:     if (!$numtoanalyze) { $numtoanalyze=20; }
1.210     albertel  262:     $result.= '<input type="submit" name="problemmode" value='.
                    263: 	&mt('"Calculate answers').'" /> for
1.136     albertel  264:              <input type="text" name="numtoanalyze" value="'.
1.210     albertel  265: 	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
                    266: 	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
1.176     albertel  267: 						     '',undef,undef,300).
1.210     albertel  268: 						     '<hr />';
1.159     albertel  269:     return $result;
1.48      albertel  270: }
                    271: 
1.65      albertel  272: sub initialize_storage {
1.159     albertel  273:     %Apache::lonhomework::results=();
1.162     albertel  274:     %Apache::lonhomework::history=();
1.159     albertel  275:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.162     albertel  276:     if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
1.159     albertel  277: 	%Apache::lonhomework::history=
                    278: 	    &Apache::lonnet::tmprestore($ENV{'request.uri'},'',$domain,$name);
                    279: 	my ($temp)=keys %Apache::lonhomework::history ;
                    280: 	&Apache::lonxml::debug("Return message of $temp");
                    281:     } else {
                    282: 	%Apache::lonhomework::history=
                    283: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    284:     }
                    285:     #ignore error conditions
1.67      albertel  286:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  287:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  288: }
                    289: 
                    290: # -------------------------------------------------------------finalize_storage
                    291: # Stores away the result has to a student's environment
                    292: # checks form.grade_ for specific values, other wises stores
                    293: # to the running users environment
                    294: sub finalize_storage {
1.159     albertel  295:     my $result;
                    296:     my ($temp) = keys %Apache::lonhomework::results;
                    297:     if ( $temp ne '' ) {
                    298: 	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.162     albertel  299: 	if ($ENV{'request.state'} eq 'construct' || $symb eq '') {
                    300: 	    $Apache::lonhomework::results{'rndseed'}=$ENV{'form.rndseed'};
1.159     albertel  301: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
                    302: 					$ENV{'request.uri'},'',$domain,$name);
                    303: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    304: 	} else {
                    305: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    306: 					    $symb,$courseid,$domain,$name);
                    307: 	    &Apache::lonxml::debug('Store return message:'.$result);
                    308: 	}
1.67      albertel  309:     }
1.159     albertel  310:     return $result;
1.65      albertel  311: }
                    312: 
                    313: sub checkout_msg {
1.211     albertel  314:     my %lt=&Apache::lonlocal::texthash( 
                    315: 		'resource'=>'The resource needs to be checked out',
                    316: 		'id_expln'=>'As a resource gets checked out, a unique timestamped ID is given to it, and a permanent record is left in the system.',
                    317:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    318:                 'checkout'=>'Check out Exam for Viewing',
                    319: 		'checkout?'=>'Check out Exam?');
1.159     albertel  320:     return (<<ENDCHECKOUT);
1.211     albertel  321: <h2>$lt{'resource'}</h2>
                    322:     <p>$lt{'id_expln'}</p>
                    323: <font color="red">
                    324: <p>$lt{'warning'}</p>
1.91      albertel  325: </font>
                    326: <form name="checkout" method="POST" action="$ENV{'request.uri'}">
                    327: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  328: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  329: </form>
                    330: ENDCHECKOUT
                    331: }
                    332: 
1.204     albertel  333: sub init_problem_globals {
                    334:     my ($type)=@_;
                    335:     #initialize globals
                    336:     if ($type eq 'problem') {
                    337: 	$Apache::inputtags::part='0';
                    338: 	@Apache::inputtags::partlist=('0');
                    339: 	$Apache::lonhomework::problemstatus=
                    340: 	    &Apache::lonnet::EXT('resource.0.problemstatus');
1.235     albertel  341: 	&Apache::lonxml::debug("problem status is  $Apache::lonhomework::problemstatus");
                    342: 	&Apache::lonxml::debug("env probstat is ".$ENV{'form.problemstatus'});
                    343: 	if ($ENV{'request.state'} eq 'construct' &&
                    344: 	    defined($ENV{'form.problemstatus'})) {
                    345: 	    $Apache::lonhomework::problemstatus=$ENV{'form.problemstatus'};
                    346: 	}
1.204     albertel  347:     } else {
                    348: 	$Apache::inputtags::part='';
                    349: 	@Apache::inputtags::partlist=();
                    350: 	$Apache::lonhomework::problemstatus='';	
                    351:     }
                    352:     @Apache::inputtags::responselist = ();
                    353:     @Apache::inputtags::importlist = ();
                    354:     @Apache::inputtags::previous=();
                    355:     @Apache::inputtags::previous_version=();
                    356:     $Apache::structuretags::printanswer='No';
                    357:     @Apache::structuretags::whileconds=();
                    358:     @Apache::structuretags::whilebody=();
                    359:     @Apache::structuretags::whileline=();
                    360:     $Apache::lonhomework::scantronmode=0;
                    361:     undef($Apache::lonhomework::name);
                    362: 
                    363: }
                    364: 
                    365: sub reset_problem_globals {
                    366:     my ($type)=@_;
                    367:     undef(%Apache::lonhomework::history);
                    368:     undef(%Apache::lonhomework::results);
                    369:     undef($Apache::inputtags::part);
1.208     albertel  370: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    371: #detect if we try to do 2 problems in one file
                    372: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  373:     undef($Apache::lonhomework::name);
                    374: }
                    375: 
1.9       albertel  376: sub start_problem {
1.159     albertel  377:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.19      albertel  378: 
1.184     albertel  379:     if ( $Apache::inputtags::part ne '' ||
                    380: 	 $Apache::lonhomework::parsing_a_problem) {
                    381: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
                    382: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
1.159     albertel  383: 	return '';
                    384:     }
1.184     albertel  385: 
                    386:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  387:     &init_problem_globals('problem');
1.166     albertel  388: 
                    389:     if (defined($ENV{'scantron.maxquest'})) {
                    390: 	$Apache::lonhomework::scantronmode=1;
                    391:     }
1.161     albertel  392: 
1.159     albertel  393:     if ($target ne 'analyze') {
                    394: 	&initialize_storage();
                    395: 	if ($target eq 'web') {
                    396: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
1.238     albertel  397: 	}
                    398: 	if ($ENV{'request.state'} eq 'construct' &&
                    399: 	    $ENV{'form.problemstate'} eq 'CANNOT_ANSWER_correct' ) {
                    400: 	    $Apache::lonhomework::history{'resource.0.solved'}=
                    401: 		'correct_by_student';
1.159     albertel  402: 	}
                    403: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.237     albertel  404: 	if (($ENV{'request.state'} eq 'construct') &&
                    405: 	    defined($ENV{'form.problemtype'})) {
                    406: 	    $Apache::lonhomework::type=$ENV{'form.problemtype'};
                    407: 	}
1.159     albertel  408: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
                    409:     }
1.164     albertel  410:     if ($Apache::lonhomework::type eq '' ) {
1.159     albertel  411: 	my $uri=$ENV{'request.uri'};
                    412: 	if ($uri=~/\.(\w+)$/) {
                    413: 	    $Apache::lonhomework::type=$1;
                    414: 	    &Apache::lonxml::debug("Using type of $1");
                    415: 	} else {
                    416: 	    $Apache::lonhomework::type='problem';
                    417: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    418: 	}
1.87      albertel  419:     }
1.58      www       420: 
1.159     albertel  421:     #added vars to the scripting enviroment
1.213     albertel  422:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.24      albertel  423:     &Apache::run::run($expression,$safeeval);
1.159     albertel  424:     my $status;
                    425:     my $accessmsg;
                    426: 
                    427:     #should get back a <html> or the neccesary stuff to start XML/MathML
                    428:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    429: 	&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    430:     if ($target eq 'tex' and $ENV{'request.symb'} =~ m/\.page_/) {$result='';}
                    431: 
                    432:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    433:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    434: 	$target eq 'tex') {
                    435: 	#handle exam checkout
                    436: 	if ($Apache::lonhomework::type eq 'exam') {
                    437: 	    my $token=
                    438: 		$Apache::lonhomework::history{"resource.0.outtoken"};
                    439: 	    if (($ENV{'form.doescheckout'}) && (!$token)) {
                    440: 		$token=&Apache::lonxml::maketoken();
                    441: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    442: 		    $token;
                    443: 	    }
                    444: 	    $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  445: 	}
1.159     albertel  446: 
                    447: 	#handle rand seed in construction space
                    448: 	my $rndseed=&setup_rndseed($safeeval);
1.162     albertel  449: 	my ($symb)=&Apache::lonxml::whichuser();
1.163     albertel  450: 	if ($ENV{'request.state'} ne "construct" && $symb eq '') {
1.162     albertel  451: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    452: 		$rndseed.'" />'.
                    453: 		    '<input type="submit" name="resetdata"
1.211     albertel  454:                              value="'.&mt('New Problem Variation').'" />'.
1.164     albertel  455: 		    '<input type="hidden" name="username"
1.185     albertel  456:                              value="'.$ENV{'form.username'}.'" /> <br />';
1.162     albertel  457: 	}
1.159     albertel  458: 	($status,$accessmsg) = &Apache::lonhomework::check_access('0');
                    459: 	push (@Apache::inputtags::status,$status);
                    460: 	my $expression='$external::datestatus="'.$status.'";';
                    461: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    462: 	&Apache::run::run($expression,$safeeval);
                    463: 	&Apache::lonxml::debug("Got $status");
                    464: 	if (( $status eq 'CLOSED' ) ||
                    465: 	    ( $status eq 'UNCHECKEDOUT') ||
                    466: 	    ( $status eq 'BANNED') ||
1.216     albertel  467: 	    ( $status eq 'UNAVAILABLE') ||
                    468: 	    ( $status eq 'INVALID_ACCESS')) {
1.159     albertel  469: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser);
                    470: 	    if ( $target eq "web" ) {
                    471: 		$result.= $head_tag_start.'</head>';
                    472: 		my $msg=$body_tag_start;
                    473: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  474: 		    $result.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.159     albertel  475: 		} else {
1.211     albertel  476: 		    $result.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  477: 		}
1.216     albertel  478: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.159     albertel  479: 		    $msg.='The problem '.$accessmsg;
                    480: 		} elsif ($status eq 'UNCHECKEDOUT') {
                    481: 		    $msg.=&checkout_msg;
                    482: 		}
                    483: 		$result.=$msg.'<br />';
                    484: 	    } elsif ($target eq 'tex') {
                    485: 		$result.='\begin{document}\noindent \vskip 1 mm  \begin{minipage}{\textwidth}\vskip 0 mm';
                    486: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  487: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  488: 		} else {
1.211     albertel  489: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  490: 		}
                    491: 	    }
                    492: 	} elsif ($target eq 'web') {
                    493: 	    my $name= &get_resource_name($parstack,$safeeval);
1.227     albertel  494: 	    $result.="$head_tag_start<title>$name</title></head>
1.158     sakharuk  495:               $body_tag_start \n $form_tag_start".	
1.227     albertel  496: 	      '<input type="hidden" name="submitted" value="yes" />';
                    497: 	    # create a page header and exit
                    498: 	    if ($ENV{'request.state'} eq "construct") {
                    499: 		$result.= &problem_web_to_edit_header($ENV{'form.rndseed'});
                    500: 	    }
                    501: 	    # if we are viewing someone else preserve that info
                    502: 	    if (defined $ENV{'form.grade_symb'}) {
                    503: 		foreach my $field ('symb','courseid','domain','username') {
                    504: 		    $result .= '<input type="hidden" name="grade_'.$field.
                    505: 			'" value="'.$ENV{"form.grade_$field"}.'" />'."\n";
1.159     albertel  506: 		}
                    507: 	    }
                    508: 	} elsif ($target eq 'tex') {
1.192     sakharuk  509: 	    my $startminipage = '';
1.191     sakharuk  510: 	    if (not $ENV{'form.problem_split'}=~/yes/) {
1.192     sakharuk  511: 		$startminipage = '\begin{minipage}{\textwidth}';
1.178     sakharuk  512: 	    }
1.159     albertel  513: 	    my $id = $Apache::inputtags::part;
                    514: 	    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.223     sakharuk  515: 	    my $packages=&Apache::lonnet::metadata($ENV{'request.uri'},'packages');
                    516: 	    my @packages = split /,/,$packages;
                    517: 	    my $allow_print_points = 0;
                    518: 	    foreach my $partial_key (@packages) {
1.230     albertel  519: 		if ($partial_key=~m/^part_0$/) {
1.223     sakharuk  520: 		    $allow_print_points=1;
1.159     albertel  521: 		}
                    522: 	    }
                    523: 	    my $duedate = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    524: 	    $duedate = POSIX::strftime("%c",localtime($duedate));
                    525: 	    my $temp_file;
                    526: 	    my $filename = "/home/httpd/prtspool/$ENV{'user.name'}_$ENV{'user.domain'}_printout.due";
                    527: 	    if (-e $filename) {
                    528: 		$temp_file = Apache::File->new($filename);
                    529: 	    } else {
                    530: 		$temp_file = Apache::File->new('>>'.$filename);
                    531: 	    }
                    532: 	    my @due_file_content = <$temp_file>;
                    533: 	    my $due_file_content = $due_file_content[$#due_file_content];
                    534: 	    chomp $due_file_content;
1.231     sakharuk  535: 	    my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval));
1.159     albertel  536: 	    if ($due_file_content ne $duedate) {
                    537: 		$temp_file = Apache::File->new('>'.$filename);
                    538: 		print $temp_file "$duedate\n";
                    539: 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
                    540: 		    if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
1.206     sakharuk  541: 			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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  542: 		    } else {
1.206     sakharuk  543: 			$result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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}{'.$name_of_resourse.'}';
1.159     albertel  544: 			if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    545: 		    }
1.104     sakharuk  546: 		} else {
1.159     albertel  547: 		    $result .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
1.104     sakharuk  548: 		}
1.101     sakharuk  549: 	    } else {
1.159     albertel  550: 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
1.206     sakharuk  551: 		    $result .= '\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$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}{'.$name_of_resourse.'}';	
1.159     albertel  552: 		    if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
                    553: 		} else {
                    554: 		    $result .= '\vskip 1mm \\\\\\\\';
                    555: 		}
                    556: 	    }
1.99      sakharuk  557: 	}
1.159     albertel  558:     } elsif ($target eq 'edit') {
                    559: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    560: 	    &problem_edit_header();
1.226     albertel  561: 	$Apache::lonxml::warnings_error_header=
                    562: 	    &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  563: 	my $temp=&Apache::edit::insertlist($target,$token);
                    564: 	$result.=$temp;
                    565:     } elsif ($target eq 'modified') {
                    566: 	$result=$token->[4];
                    567: 	$result.=&Apache::edit::handle_insert();
                    568:     } else {
                    569: 	# page_start returned a starting result, delete it if we don't need it
                    570: 	$result = '';
1.99      sakharuk  571:     }
1.159     albertel  572:     return $result;
1.9       albertel  573: }
                    574: 
                    575: sub end_problem {
1.159     albertel  576:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    577:     my $result='';
                    578:     my $status=$Apache::inputtags::status['-1'];
                    579:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    580: 	$target eq 'tex') {
                    581: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0' &&
1.232     albertel  582: 	     ($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode)) {
1.159     albertel  583: 	    # if part is zero, no <part>s existed, so we need to the grading
                    584: 	    &Apache::inputtags::grade;
                    585: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    586: 		  $Apache::inputtags::part eq '0' &&
                    587: 		  $status ne 'UNCHECKEDOUT') {
                    588: 	    # if part is zero, no <part>s existed, so we need show the current
                    589: 	    # grading status
                    590: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    591: 	    $result.= $gradestatus;
                    592: 	}
                    593: 	if (
                    594: 	    (($target eq 'web') && ($ENV{'request.state'} ne 'construct')) ||
                    595: 	    ($target eq 'answer') || ($target eq 'tex')
                    596: 	   ) {
1.227     albertel  597: 	    if ($target ne 'tex' &&
                    598: 		$ENV{'form.answer_output_mode'} ne 'tex') {
                    599: 		$result.="</form></body>\n";
1.159     albertel  600: 	    }
                    601: 	    if ($target eq 'web') {
                    602: 		$result.=&Apache::lonxml::xmlend();
                    603: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  604: 		my $endminipage = '';
1.191     sakharuk  605: 		if (not $ENV{'form.problem_split'}=~/yes/) {
1.178     sakharuk  606: 		    $endminipage = '\end{minipage}';
                    607: 		}
1.174     sakharuk  608: 		$result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.159     albertel  609: 		if (not $ENV{'request.symb'} =~ m/\.page_/) {
1.178     sakharuk  610: 		    $result .= $endminipage.'\end{document} ';
1.159     albertel  611: 		} else {
                    612: 		    $result .= '';
                    613: 		}
                    614: 	    }
                    615: 	}
                    616: 	if ($target eq 'grade') {
                    617: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    618: 	    &finalize_storage();
                    619: 	}
1.172     albertel  620: 	if ($target eq 'answer' && ($ENV{'request.state'} eq 'construct')
1.173     albertel  621: 	    && $ENV{'form.answer_output_mode'} ne 'tex') {
1.172     albertel  622: 	    $result.='</html>'; # normally we get it from xmlend, but in CSTR
                    623: 	                        # we always show answer mode too.
1.159     albertel  624: 	}
                    625:     } elsif ($target eq 'meta') {
                    626: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  627: 	    @Apache::inputtags::response=();
1.159     albertel  628: 	    $result=&Apache::response::mandatory_part_meta;
                    629: 	}
1.215     albertel  630: 	$result.=&Apache::response::meta_part_order();
1.159     albertel  631:     } elsif ($target eq 'edit') {
                    632: 	&Apache::lonxml::debug("in end_problem with $target, edit");
                    633: 	$result = &problem_edit_footer();
                    634:     }
1.155     albertel  635: 
1.177     albertel  636:     if ($ENV{'request.state'} eq 'construct' && $target eq 'web') {
                    637: 	&Apache::inputtags::check_for_duplicate_ids();
                    638:     }
1.204     albertel  639: 
                    640:     &reset_problem_globals('problem');
1.159     albertel  641: 
                    642:     return $result;
1.48      albertel  643: }
                    644: 
1.108     albertel  645: 
1.48      albertel  646: sub start_library {
1.159     albertel  647:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    648:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.204     albertel  649:     if ($$tagstack[0] eq 'library') { &init_problem_globals('library') };
1.159     albertel  650:     if ($target eq 'edit') {
                    651: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    652: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    653: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    654: 	    &problem_edit_header();
                    655: 	my $temp=&Apache::edit::insertlist($target,$token);
                    656: 	$result.=$temp;
                    657:     } elsif ($target eq 'modified') {
                    658: 	$result=$token->[4];
                    659: 	$result.=&Apache::edit::handle_insert();
                    660:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
                    661: 	     $ENV{'request.state'} eq "construct" ) {
                    662: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    663: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    664: 	my $name=&get_resource_name($parstack,$safeeval);
                    665: 	my $rndseed=&setup_rndseed($safeeval);
                    666: 	$result.="$head_tag_start<title>$name</title></head>
1.105     albertel  667:               $body_tag_start \n $form_tag_start".	
1.159     albertel  668: 		  '<input type="hidden" name="submitted" value="yes" />';
                    669: 	$result.=&problem_web_to_edit_header($rndseed);
                    670:     }
                    671:     return $result;
1.48      albertel  672: }
                    673: 
                    674: sub end_library {
1.159     albertel  675:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    676:     my $result='';
                    677:     if ($target eq 'edit') {
                    678: 	$result=&problem_edit_footer();
                    679:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
                    680: 	     $ENV{'request.state'} eq "construct") {
                    681: 	$result.='</form></body>'.&Apache::lonxml::xmlend();
                    682:     }
1.204     albertel  683:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel  684:     return $result;
1.197     www       685: }
                    686: 
                    687: sub start_definetag {
                    688:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    689: 
                    690:     my $result;
                    691: 
                    692:     my $name = $token->[2]->{'name'};
                    693:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser);
                    694:     if ($name=~/^\//) {
                    695: 	$result=
                    696:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                    697:     } else {
                    698: 	$result=
                    699:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                    700:     }
                    701:     $skip=~s/\</\&lt\;/gs;
                    702:     $skip=~s/\>/\&gt\;/gs;
                    703:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                    704:     return $result;
                    705: }
                    706: 
                    707: sub end_definetag {
                    708:     return '';
1.1       albertel  709: }
                    710: 
                    711: sub start_block {
1.201     albertel  712:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel  713: 
                    714:     my $result;
1.1       albertel  715: 
1.160     albertel  716:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.131     albertel  717: 	$target eq 'tex' || $target eq 'analyze') {
1.159     albertel  718: 	my $code = $token->[2]->{'condition'};
1.201     albertel  719: 	if (defined($code)) {
1.137     albertel  720: 	    if (!$Apache::lonxml::default_homework_loaded) {
                    721: 		&Apache::lonxml::default_homework_load($safeeval);
                    722: 	    }
1.131     albertel  723: 	    $result = &Apache::run::run($code,$safeeval);
                    724: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                    725: 	} else {
                    726: 	    $result='1';
                    727: 	}
                    728: 	if ( ! $result ) {
1.201     albertel  729: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel  730: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    731: 	}
                    732: 	$result='';
                    733:     } elsif ($target eq 'edit') {
                    734: 	$result .=&Apache::edit::tag_start($target,$token);
                    735: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                    736: 					  $token,40);
                    737: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    738:     } elsif ($target eq 'modified') {
                    739: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    740: 						     $safeeval,'condition');
                    741: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel  742:     }
1.131     albertel  743:     return $result;
1.1       albertel  744: }
                    745: 
                    746: sub end_block {
1.167     www       747:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    748:     my $result;
                    749:     if ($target eq "edit") {
                    750: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    751:     }
                    752:     return $result;
                    753: }
                    754: 
                    755: sub start_languageblock {
1.201     albertel  756:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www       757: 
                    758:     my $result;
                    759: 
                    760:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    761: 	$target eq 'tex' || $target eq 'analyze') {
1.201     albertel  762: 	my $include = $token->[2]->{'include'};
                    763: 	my $exclude = $token->[2]->{'exclude'};
                    764:         my %languages=&Apache::loncommon::display_languages();
                    765:         $result='1';
                    766: 	if ($include) {
                    767:             $result='';
                    768:             foreach (split(/\,/,$include)) {
                    769:                 if ($languages{$_}) { $result='1'; }
                    770:             }
                    771: 	}
                    772:         if ($exclude) {
                    773:             foreach (split(/\,/,$exclude)) {
                    774:                 if ($languages{$_}) { $result='0'; }
                    775:             }
                    776: 	}
                    777: 	if ( ! $result ) {
                    778: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                    779: 						   $style);
                    780: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    781: 	}
                    782: 	$result='';
1.167     www       783:     } elsif ($target eq 'edit') {
                    784: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel  785: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www       786: 					  $token,40);
1.211     albertel  787: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www       788: 					  $token,40);
                    789: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    790:     } elsif ($target eq 'modified') {
                    791: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel  792: 						     $safeeval,'include',
                    793: 						     'exclude');
1.167     www       794: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                    795:     }
                    796:     return $result;
                    797: }
                    798: 
                    799: sub end_languageblock {
1.170     www       800:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    801:     my $result;
1.201     albertel  802:     if ($target eq "edit") {
1.170     www       803: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    804:     }
                    805:     return $result;
                    806: }
                    807: 
                    808: sub start_instructorcomment {
1.201     albertel  809:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www       810: 
                    811:     my $result;
                    812: 
                    813:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    814: 	$target eq 'tex' || $target eq 'analyze') {
                    815:         $result=($ENV{'request.role'}=~/^(in|cc|au|ca|li)/);
                    816: 	if ( ! $result ) {
1.201     albertel  817: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                    818: 						   $parser,$style);
1.170     www       819: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                    820: 	}
                    821: 	$result='';
                    822:     } elsif ($target eq 'edit') {
                    823: 	$result .=&Apache::edit::tag_start($target,$token);
                    824: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    825:     }
                    826:     return $result;
                    827: }
                    828: 
                    829: sub end_instructorcomment {
1.159     albertel  830:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel  831:     my $result;
                    832:     if ($target eq "edit") {
                    833: 	$result.= &Apache::edit::tag_end($target,$token,'');
                    834:     }
                    835:     return $result;
1.4       tsai      836: }
                    837: 
                    838: sub start_while {
1.159     albertel  839:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    840: 
1.160     albertel  841:     my $result;
1.161     albertel  842:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.160     albertel  843: 	$target eq 'tex' || $target eq 'analyze') {
                    844: 	my $code = $token->[2]->{'condition'};
1.4       tsai      845: 
1.160     albertel  846: 	push( @Apache::structuretags::whileconds, $code);
                    847: 	if (!$Apache::lonxml::default_homework_loaded) {
                    848: 	    &Apache::lonxml::default_homework_load($safeeval);
                    849: 	}
                    850: 	my $result = &Apache::run::run($code,$safeeval);
1.161     albertel  851: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser);
1.160     albertel  852: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel  853: 	push( @Apache::structuretags::whileline, $token->[5]);
                    854: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel  855: 	if ( $result ) {
                    856: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                    857: 	}
                    858:     } elsif ($target eq 'edit') {
                    859: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel  860: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel  861: 					  $token,40);
                    862: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    863:     } elsif ($target eq 'modified') {
                    864: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    865: 						     $safeeval,'condition');
                    866: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel  867:     }
1.160     albertel  868:     return $result;
1.4       tsai      869: }
                    870: 
                    871: sub end_while {
1.159     albertel  872:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel  873:     my $result;
                    874: 
                    875:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    876: 	$target eq 'tex' || $target eq 'analyze') {
                    877: 	my $code = pop(@Apache::structuretags::whileconds);
                    878: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel  879: 	my $line = pop(@Apache::structuretags::whileline);
                    880: 	my $return = &Apache::run::run($code,$safeeval);
                    881: 	my $starttime=time;
                    882: 	my $error=0;
                    883: 	while ($return) {
                    884: 	    if (time-$starttime >
                    885: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
                    886: 		$return = 0; $error=1; next;
                    887: 	    }
                    888: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                    889: 	    $return = &Apache::run::run($code,$safeeval);
                    890: 	}
                    891: 	if ($error) {
1.211     albertel  892: 	    &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  893: 	}
                    894:     } elsif ($target eq "edit") {
                    895: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel  896:     }
1.160     albertel  897:     return $result;
1.1       albertel  898: }
1.6       tsai      899: 
1.160     albertel  900: # <randomlist show="1">
1.6       tsai      901: #  <tag1>..</tag1>
                    902: #  <tag2>..</tag2>
                    903: #  <tag3>..</tag3>
1.160     albertel  904: #  ...
1.6       tsai      905: # </randomlist>
                    906: sub start_randomlist {
1.159     albertel  907:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    908:     my $result;
                    909:     if ($target eq 'answer' || $target eq 'grade' || $target eq 'web' ||
                    910: 	$target eq 'tex' || $target eq 'analyze') {
                    911: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
                    912: 	my $b_parser= HTML::TokeParser->new(\$body);
                    913: 	my $b_tok;
                    914: 	my @randomlist;
                    915: 	my $list_item;
                    916: 	while($b_tok = $b_parser->get_token() ) {
                    917: 	    if($b_tok->[0] eq 'S') { # start tag
                    918: 		# get content of the tag until matching end tag
                    919: 		# get all text upto the matching tag
                    920: 		# and push the content into @randomlist
                    921: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                    922: 							   $b_parser);
                    923: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                    924: 		push(@randomlist,$list_item);
                    925: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                    926:                 #         $list_item</b>";
                    927: 	    }
                    928: 	    if($b_tok->[0] eq 'T') { # text
                    929: 		# what to do with text in between tags?
                    930: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                    931: 	    }
                    932: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                    933: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                    934: 	    # }
                    935: 	}
                    936: 	my @idx_arr = (0 .. $#randomlist);
                    937: 	&Apache::structuretags::shuffle(\@idx_arr);
                    938: 	my $bodytext = '';
                    939: 	my $show=$#randomlist;
                    940: 	my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                    941: 	$showarg--;
                    942: 	if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                    943: 	for(0 .. $show) {
                    944: 	    $bodytext .= "$randomlist[ $idx_arr[$_] ]";
                    945: 	}
                    946: 	&Apache::lonxml::newparser($parser,\$bodytext);
                    947:     } elsif ($target eq 'edit' ) {
                    948: 	$result .=&Apache::edit::tag_start($target,$token);
                    949: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                    950: 					   $token,5);
                    951: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                    952:     } elsif ($target eq 'modified' ) {
                    953: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                    954: 						     $safeeval,'show');
                    955: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                    956:     }
                    957:     return $result;
1.7       tsai      958: }
                    959: 
                    960: sub shuffle {
                    961:     my $a=shift;
                    962:     my $i;
1.70      albertel  963:     if (defined(@$a)) {
1.159     albertel  964: 	&Apache::response::setrandomnumber();
                    965: 	for($i=@$a;--$i;) {
                    966: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                    967: 	    next if $i == $j;
                    968: 	    @$a[$i,$j] = @$a[$j,$i];
                    969: 	}
1.7       tsai      970:     }
1.6       tsai      971: }
                    972: 
                    973: sub end_randomlist {
1.159     albertel  974:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    975:     my $result;
                    976:     if ($target eq 'edit' ) {
                    977: 	$result=&Apache::edit::tag_end($target,$token,
                    978: 				       'End Randomly Parsed Block');
                    979:     }
                    980:     return $result;
1.6       tsai      981: }
                    982: 
1.11      albertel  983: sub start_part {
1.159     albertel  984:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    985:     my $result='';
                    986:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
                    987:     if ($id eq '') { $id = $Apache::lonxml::curdepth; }
                    988:     $Apache::inputtags::part=$id;
1.177     albertel  989:     push(@Apache::inputtags::partlist,$id);
                    990:     @Apache::inputtags::response=();
1.159     albertel  991:     @Apache::inputtags::previous=();
                    992:     @Apache::inputtags::previous_version=();
1.169     albertel  993:     $Apache::lonhomework::problemstatus=
                    994: 	&Apache::lonnet::EXT("resource.$id.problemstatus");
1.159     albertel  995:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.214     albertel  996:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.209     albertel  997:     &Apache::run::run($expression,$safeeval);
1.159     albertel  998: 
                    999:     if ($target eq 'meta') {
1.224     www      1000: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1001: 	return &Apache::response::mandatory_part_meta.
                   1002: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1003:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1004: 	     $target eq 'answer' || $target eq 'tex') {
                   1005: 	if ($hidden) {
                   1006: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1007: 	} else {
                   1008: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1009: 	    push (@Apache::inputtags::status,$status);
                   1010: 	    my $expression='$external::datestatus="'.$status.'";';
                   1011: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1012: 	    &Apache::run::run($expression,$safeeval);
1.216     albertel 1013: 	    if (( $status eq 'CLOSED' ) ||
                   1014: 		( $status eq 'UNCHECKEDOUT') ||
                   1015: 		( $status eq 'BANNED') ||
                   1016: 		( $status eq 'UNAVAILABLE') ||
                   1017: 		( $status eq 'INVALID_ACCESS')) {
1.159     albertel 1018: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser);
                   1019: 		if ( $target eq "web" ) {
1.211     albertel 1020: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1021: 		} elsif ( $target eq 'tex' ) {
1.195     sakharuk 1022: 		    if (not $ENV{'form.problem_split'}=~/yes/) {
1.211     albertel 1023: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1024: 		    } else {
1.211     albertel 1025: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1026: 		    }
1.159     albertel 1027: 		}
                   1028: 	    } else {
                   1029: 		if ($target eq 'tex') {
1.195     sakharuk 1030: 		    if (not $ENV{'form.problem_split'}=~/yes/) {
                   1031: 			$result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1032: 		    }
1.159     albertel 1033: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.230     albertel 1034: 		    my $allkeys=&Apache::lonnet::metadata($ENV{'request.uri'},'packages');
1.222     sakharuk 1035: 		    my @allkeys = split /,/,$allkeys;
                   1036: 		    my $allow_print_points = 0;
                   1037: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1038: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1039: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1040: 			}
                   1041: 		    }
                   1042: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1043: 		} elsif ($target eq 'web') {
                   1044: 		    $result.='<a name="'.&Apache::lonnet::escape($Apache::inputtags::part).'" />';
1.159     albertel 1045: 		}
                   1046: 	    }
                   1047: 	}
                   1048:     } elsif ($target eq 'edit') {
                   1049: 	$result.=&Apache::edit::tag_start($target,$token);
                   1050: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1051: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1052: 	    '&nbsp;&nbsp;'.
                   1053: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1054: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1055:     } elsif ($target eq 'modified') {
                   1056: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1057: 						     $safeeval,'id','display');
1.159     albertel 1058: 	if ($constructtag) {
1.225     albertel 1059: 	    #limiting ids to only letters numbers, and space
1.224     www      1060: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1061: 	    $result = &Apache::edit::rebuild_tag($token);
                   1062: 	    $result.=&Apache::edit::handle_insert();
                   1063: 	}
                   1064:     }
                   1065:     return $result;
1.11      albertel 1066: }
                   1067: 
                   1068: sub end_part {
1.159     albertel 1069:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1070:     &Apache::lonxml::debug("in end_part $target ");
                   1071:     my $status=$Apache::inputtags::status['-1'];
                   1072:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
                   1073:     my $result='';
                   1074:     if ( $target eq 'meta' ) {
                   1075: 	$result='';
1.232     albertel 1076:     } elsif ($target eq 'grade' && 
                   1077: 	     ($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
                   1078: 	     !$hidden) {
1.159     albertel 1079: 	$result=&Apache::inputtags::grade;
                   1080:     } elsif (($target eq 'web' || $target eq 'tex') && !$hidden ) {
                   1081: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1082: 							$target);
1.212     albertel 1083: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1084: 	    $gradestatus='';
                   1085: 	}
1.159     albertel 1086: 	$result=$gradestatus;
1.181     albertel 1087:     } elsif ($target eq 'edit') {
                   1088: 	$result=&Apache::edit::end_table();
1.159     albertel 1089:     }
                   1090:     pop @Apache::inputtags::status;
                   1091:     $Apache::inputtags::part='';
                   1092:     return $result;
1.11      albertel 1093: }
1.1       albertel 1094: 
1.25      albertel 1095: sub start_preduedate {
1.159     albertel 1096:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1097:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' || $target eq 'tex') {
1.236     albertel 1098: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.159     albertel 1099: 	if ($Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1100: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1101: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.159     albertel 1102: 	    &Apache::lonxml::get_all_text("/preduedate",$parser);
                   1103: 	}
1.24      albertel 1104:     }
1.159     albertel 1105:     return '';
1.24      albertel 1106: }
                   1107: 
1.25      albertel 1108: sub end_preduedate {
1.159     albertel 1109:     return '';
1.24      albertel 1110: }
                   1111: 
1.25      albertel 1112: sub start_postanswerdate {
1.159     albertel 1113:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.234     albertel 1114:     if ($target eq 'web' || $target eq 'grade') {
1.159     albertel 1115: 	if ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
                   1116: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser);
                   1117: 	}
                   1118:     } elsif ($target eq 'tex') {
1.234     albertel 1119: 	&Apache::lonxml::get_all_text("/postanswerdate",$parser);
1.159     albertel 1120:     }
                   1121:     return '';
1.24      albertel 1122: }
                   1123: 
1.25      albertel 1124: sub end_postanswerdate {
1.159     albertel 1125:     return '';
1.24      albertel 1126: }
                   1127: 
1.25      albertel 1128: sub start_notsolved {
1.159     albertel 1129:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1130:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1131: 	$target eq 'tex') {
                   1132: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1133: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239   ! albertel 1134: 	if ($gradestatus =~ /^correct/ &&
        !          1135: 	    &Apache::response::show_answer()) {
1.159     albertel 1136: 	    &Apache::lonxml::debug("skipping");
                   1137: 	    &Apache::lonxml::get_all_text("/notsolved",$parser);
                   1138: 	}
1.24      albertel 1139:     }
1.159     albertel 1140:     return '';
1.24      albertel 1141: }
                   1142: 
1.25      albertel 1143: sub end_notsolved {
1.159     albertel 1144:     return '';
1.24      albertel 1145: }
                   1146: 
                   1147: sub start_solved {
1.159     albertel 1148:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1149:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1150: 	$target eq 'tex') {
                   1151: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239   ! albertel 1152: 	if ($gradestatus !~ /^correct/ ||
        !          1153: 	    !&Apache::response::show_answer()) {
1.159     albertel 1154: 	    &Apache::lonxml::get_all_text("/solved",$parser);
                   1155: 	}
1.24      albertel 1156:     }
1.159     albertel 1157:     return '';
1.24      albertel 1158: }
                   1159: 
                   1160: sub end_solved {
1.159     albertel 1161:     return '';
1.24      albertel 1162: }
1.34      albertel 1163: 
                   1164: sub start_startouttext {
1.159     albertel 1165:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1166:     my @result=(''.'');
                   1167:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1168:     return (@result);
1.34      albertel 1169: }
1.159     albertel 1170: 
1.34      albertel 1171: sub end_startouttext {
1.159     albertel 1172:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1173:     my $result='';
                   1174:     my $text='';
                   1175: 
                   1176:     if ($target eq 'edit') {
                   1177: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser);
1.211     albertel 1178: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1179: <td>".&mt('Delete:').
1.159     albertel 1180:                  &Apache::edit::deletelist($target,$token)
                   1181: 		 ."</td>
1.42      albertel 1182: <td>".
1.159     albertel 1183:                  &Apache::edit::insertlist($target,$token).
                   1184: 		 &Apache::edit::end_row().
                   1185:                  &Apache::edit::start_spanning_row()."\n"
1.188     bowersj2 1186: 		 . &Apache::loncommon::helpLatexCheatsheet () .
1.159     albertel 1187: 		 &Apache::edit::editfield($token->[1],$text,"",80,4);
                   1188:     }
                   1189:     if ($target eq 'modified') {
1.219     albertel 1190: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1191:     }
                   1192:     if ($target eq 'tex') {
                   1193: 	$result .= '\noindent ';
                   1194:     }
                   1195:     return $result;
1.34      albertel 1196: }
1.159     albertel 1197: 
1.34      albertel 1198: sub start_endouttext {
1.159     albertel 1199:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1200:     my $result='';
                   1201:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1202:     if ($target eq "modified") {
                   1203: 	$result='<endouttext />'.
                   1204: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1205:     return $result;
1.34      albertel 1206: }
1.159     albertel 1207: 
1.34      albertel 1208: sub end_endouttext {
1.159     albertel 1209:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1210:     my @result=('','');
                   1211:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1212:     return (@result);
1.34      albertel 1213: }
1.159     albertel 1214: 
1.45      albertel 1215: sub delete_startouttext {
1.159     albertel 1216:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1217:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser);
                   1218:     my $text=$$parser['-1']->get_text("/endouttext");
                   1219:     my $ntoken=$$parser['-1']->get_token();
                   1220:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1221:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1222:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1223:     # they did the last time round
                   1224:     &Apache::lonxml::increasedepth($ntoken);
                   1225:     &Apache::lonxml::decreasedepth($ntoken);
                   1226:     return 1;
1.193     www      1227: }
                   1228: 
                   1229: sub start_simpleeditbutton {
                   1230:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1231:     my $result='';
                   1232:     if (($target eq 'web') &&
                   1233:         (&Apache::lonnet::allowed('srm',$ENV{'request.course.id'}))) {
1.220     www      1234:         my $url=$ENV{'request.noversionuri'};
1.193     www      1235:         $url=~s/\?.*$//;
1.194     www      1236: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.211     albertel 1237:                 '<a href="'.$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      1238: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1239:     }
                   1240:     return $result;
                   1241: }
                   1242: 
                   1243: sub end_simpleeditbutton {
                   1244:     return '';
1.45      albertel 1245: }
1.34      albertel 1246: 
1.1       albertel 1247: 1;
                   1248: __END__

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