Annotation of loncom/homework/structuretags.pm, revision 1.339

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.339   ! albertel    4: # $Id: structuretags.pm,v 1.338 2006/03/02 22:04:04 albertel Exp $
1.74      albertel    5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.254     www        28: ###
1.54      www        29: 
1.133     sakharuk   30: 
1.1       albertel   31: package Apache::structuretags; 
                     32: 
                     33: use strict;
                     34: use Apache::lonnet;
1.101     sakharuk   35: use Apache::File();
1.147     www        36: use Apache::lonmenu;
1.210     albertel   37: use Apache::lonlocal;
1.231     sakharuk   38: use Apache::lonxml;
1.338     albertel   39: use Apache::lonenc();
1.267     albertel   40: use Time::HiRes qw( gettimeofday tv_interval );
1.78      harris41   41: BEGIN {
1.248     albertel   42:     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startouttext','endouttext','simpleeditbutton','definetag'));
1.10      albertel   43: }
                     44: 
                     45: sub start_web {
1.326     albertel   46:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                     47:     my $bodytext=&Apache::lonxml::get_all_text("/web",$parser,$style);
1.339   ! albertel   48:     if ($target eq 'web' || $target eq 'webgrade') {
1.200     albertel   49: 	return $bodytext;
1.159     albertel   50:     }
                     51:     return '';
1.10      albertel   52: }
                     53: 
                     54: sub end_web {
1.44      ng         55:     return '';
1.10      albertel   56: }
                     57: 
                     58: sub start_tex {
1.326     albertel   59:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.198     sakharuk   60:     my $result='';
1.326     albertel   61:     my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
1.200     albertel   62:     if ($target eq 'tex') {
                     63: 	return $bodytext.' ';
1.159     albertel   64:     }
1.198     sakharuk   65:     return $result;;
1.10      albertel   66: }
                     67: 
                     68: sub end_tex {
1.44      ng         69:     return '';
1.9       albertel   70: }
                     71: 
1.290     albertel   72: sub body_tag_start {
                     73:     my ($target,$background,$bgcolor)=@_;
                     74:     my $body_tag_start='<body onload="'.&Apache::lonmenu::loadevents().'" '.
                     75: 	'onunload="'.&Apache::lonmenu::unloadevents().'" ';
                     76:     if ($env{'browser.imagesuppress'} eq 'on') { $background=''; }
                     77:     if ($background) {
1.306     albertel   78: 	&Apache::lonxml::extlink($background);
1.290     albertel   79: 	$body_tag_start.='background="'.$background.'" ';
                     80:     } else {
                     81: 	if (($bgcolor) && ($env{'browser.blackwhite'} ne 'on')) {
                     82: 	    $body_tag_start.='bgcolor="'.$bgcolor.'" ';
                     83: 	} else {
                     84: 	    $body_tag_start.='bgcolor="#ffffff"';
                     85: 	}
                     86:     }
                     87:     if ($env{'browser.fontenhance'} eq 'on') {
                     88: 	$body_tag_start.=' style="font-size: x-large;" ';
                     89:     }
                     90:     $body_tag_start.='>'.&Apache::lonmenu::menubuttons(undef,$target,1);
1.297     albertel   91:     
                     92:     &Apache::lontexconvert::jsMath_reset();
1.290     albertel   93:     if ($env{'environment.texengine'} eq 'jsMath') {
1.297     albertel   94: 	$body_tag_start.=&Apache::lontexconvert::jsMath_header();
1.290     albertel   95:     }
                     96:     return $body_tag_start;
                     97: }
1.291     albertel   98: 
1.48      albertel   99: sub page_start {
1.159     albertel  100:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    101:     my %found;
1.207     albertel  102:     foreach my $taginside (@$tagstack) {
1.159     albertel  103: 	foreach my $taglookedfor ('html','body','form') {
                    104: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                    105: 	}
                    106:     }
                    107: 
                    108:     my $result;
                    109:     my $head_tag_start;
                    110:     if (!defined($found{'html'})) {
                    111: 	$result=&Apache::londefdef::start_html($target,$token,$tagstack,
                    112: 					       $parstack,$parser,$safeeval);
1.254     www       113: 	$head_tag_start='<head>'.&Apache::lonmenu::registerurl(undef,$target).
1.261     www       114: 	    &Apache::lonhtmlcommon::htmlareaheaders().
1.270     albertel  115: 	    &Apache::lonhtmlcommon::spellheader().
                    116: 	    &Apache::lonxml::fontsettings();     
1.336     albertel  117: 	my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
1.335     albertel  118: 	if ($css_href =~ /\S/) {
                    119: 	    &Apache::lonxml::extlink($css_href);
                    120: 	    $head_tag_start = 
                    121: 		'<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
                    122: 	}
1.327     albertel  123: 	if ($target eq 'edit') {
                    124: 	    $head_tag_start.=&Apache::edit::js_change_detection();
                    125: 	}
1.159     albertel  126:     }
                    127:     my $body_tag_start;
1.318     albertel  128:     if (!defined($found{'body'}) && $env{'request.state'} eq 'construct') {
                    129: 	if ($env{'environment.remote'} eq 'off') {
                    130: 	    if ($target eq 'web' || $target eq 'edit') {
                    131: 		$body_tag_start=&Apache::loncommon::bodytag();
                    132: 		$body_tag_start.=&Apache::lonxml::message_location();
                    133: 	    }
                    134: 	} else {
                    135: 	    if ($target eq 'web' || $target eq 'edit') {
                    136: 		$body_tag_start=&Apache::loncommon::bodytag(undef,undef,undef,1);
                    137: 		$body_tag_start.=&Apache::lonxml::message_location();
                    138: 	    }
1.297     albertel  139: 	}
1.272     albertel  140:     } elsif (!defined($found{'body'})) {
1.159     albertel  141: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    142: 						  $safeeval);
1.290     albertel  143: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    144: 					       $safeeval);
1.299     albertel  145: 	$body_tag_start=&body_tag_start($target,$background,$bgcolor);
1.291     albertel  146: 	if ( ($target eq 'web' || $target eq 'webgrade')
                    147: 	     && $env{'request.state'} ne 'construct') {
1.165     albertel  148: 	    my ($symb,undef,undef,undef,$publicuser)=
                    149: 		&Apache::lonxml::whichuser();
                    150: 	    if ($symb eq '' && !$publicuser) {
1.159     albertel  151: 		my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
1.211     albertel  152: 		$help=&mt("Browsing resource, all submissions are temporary.")."<br />";
1.159     albertel  153: 		$body_tag_start.=$help;
                    154: 	    }
                    155: 	}
1.245     albertel  156: 	$body_tag_start.=&Apache::lonxml::message_location();
1.159     albertel  157:     }
                    158:     my $form_tag_start;
                    159:     if (!defined($found{'form'})) {
1.337     albertel  160: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
1.338     albertel  161: 	my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.327     albertel  162: 	$form_tag_start.=$uri.'" ';
                    163: 	if ($target eq 'edit') {
                    164: 	    $form_tag_start.=&Apache::edit::form_change_detection();
                    165: 	}
                    166: 	$form_tag_start.='>';
1.159     albertel  167:     }
                    168:     return ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.105     albertel  169: }
                    170: 
1.141     matthew   171: #use Time::HiRes();
1.105     albertel  172: sub get_resource_name {
1.159     albertel  173:     my ($parstack,$safeeval)=@_;
1.204     albertel  174:     if (defined($Apache::lonhomework::name)) {
                    175: 	return $Apache::lonhomework::name;
                    176:     }
1.279     albertel  177:     my ($symb)=&Apache::lonxml::whichuser();
                    178:     my $name=&Apache::lonnet::gettitle($symb);
1.159     albertel  179:     if ($name eq '') {
                    180: 	$name=&Apache::lonnet::EXT('resource.title');
                    181: 	if ($name eq 'con_lost') { $name = ''; }
                    182:     }
1.204     albertel  183:     if ($name!~/\S+/) {
1.284     albertel  184: 	$name=$env{'request.uri'};
1.205     albertel  185: 	$name=~s-.*/([^/]+)$-$1-;
1.204     albertel  186:     }
1.159     albertel  187:     $Apache::lonhomework::name=$name;
                    188:     return $name;
1.105     albertel  189: }
                    190: 
                    191: sub setup_rndseed {
1.159     albertel  192:     my ($safeeval)=@_;
                    193:     my $rndseed;
1.162     albertel  194:     my ($symb)=&Apache::lonxml::whichuser();
1.333     albertel  195:     if ($env{'request.state'} eq "construct" 
                    196: 	|| $symb eq '' 
                    197: 	|| $Apache::lonhomework::type eq 'practice'
                    198: 	|| $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       199: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  200: 						['rndseed']);
1.284     albertel  201: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  202: 	if (!$rndseed) {
1.162     albertel  203: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    204: 	    if (!$rndseed) {
                    205: 		$rndseed=time;
                    206: 	    }
1.284     albertel  207: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  208: 	}
1.284     albertel  209: 	if ($env{'form.resetdata'} eq &mt('New Problem Variation') ||
                    210: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  211: 	    srand(time);
                    212: 	    $rndseed=int(rand(2100000000));
1.284     albertel  213: 	    $env{'form.rndseed'}=$rndseed;
                    214: 	    delete($env{'form.resetdata'});
                    215: 	    delete($env{'form.newrandomization'});
1.159     albertel  216: 	}
1.187     albertel  217: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
1.307     albertel  218: 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
1.187     albertel  219:         }
1.247     albertel  220:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    221: 	   $rndseed=&Apache::lonnet::rndseed();
                    222: 	}
1.221     albertel  223: 	if ($safeeval) {
                    224: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  225: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  226: 	}
1.159     albertel  227:     }
                    228:     return $rndseed;
1.105     albertel  229: }
                    230: 
1.268     albertel  231: sub remember_problem_state {
                    232:     return '
1.284     albertel  233:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    234:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    235:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  236: }
                    237: 
1.105     albertel  238: sub problem_edit_header {
1.268     albertel  239:     return '<input type="hidden" name="submitted" value="edit" />'.
                    240: 	&Apache::structuretags::remember_problem_state().'
1.210     albertel  241:        <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
1.243     matthew   242:        <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
1.328     albertel  243:        <input '.&Apache::edit::submit_ask_anyway().' type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
1.243     matthew   244:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> <hr />
                    245:        <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes and Edit').'" />
                    246:        <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
1.260     albertel  247:        &Apache::loncommon::help_open_menu('','Problem Editing Help','Problem_Editor_XML_Index','',5,'Authoring',undef,undef,undef,'Problem Editing Help')
                    248:        .'</td></tr></table>'.
1.282     albertel  249:        '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  250: }
                    251: 
                    252: sub problem_edit_footer {
1.210     albertel  253:     return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
1.255     www       254:     <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />'.
                    255:     &Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields).
1.280     albertel  256:     "\n</form>\n".&Apache::loncommon::endbodytag()."\n</html>";
1.105     albertel  257: }
                    258: 
1.235     albertel  259: sub option {
                    260:     my ($value,$name) = @_;
                    261:     my $result ="<option value='".$value."' ";
1.284     albertel  262:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  263: 	$result.=" selected='on' ";
                    264:     }
                    265:     $result.='>';
                    266:     return $result;
                    267: }
                    268: 
1.105     albertel  269: sub problem_web_to_edit_header {
1.159     albertel  270:     my ($rndseed)=@_;
1.313     albertel  271:     my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />';
                    272:     if (!$Apache::lonhomework::parsing_a_task) {
                    273: 	$result .= '<input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />';
                    274:     }
                    275:     $result .= '<input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
1.243     matthew   276:              <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    277:              <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
1.210     albertel  278:              <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
1.270     albertel  279:               <input type="text" name="rndseed" size="10" value="'.
1.175     albertel  280: 	       $rndseed.'"
1.270     albertel  281:            onchange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
1.281     albertel  282:              <label><input type="checkbox" name="showallfoils" ';
1.315     albertel  283:     my $show_all_foils_text = 
                    284: 	($Apache::lonhomework::parsing_a_task) ?
                    285: 	&mt('&nbsp;Show&nbsp;All&nbsp;Instances')
                    286: 	: &mt('&nbsp;Show&nbsp;All&nbsp;Foils');
                    287: 
1.284     albertel  288:     if (defined($env{'form.showallfoils'})) { $result.='checked="on"'; }
1.315     albertel  289:     $result.= ' />'.$show_all_foils_text.
1.228     www       290: 	&Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
1.281     albertel  291: 	'</label><hr />';
1.313     albertel  292:     if (!$Apache::lonhomework::parsing_a_task) {
                    293: 	$result.="
1.235     albertel  294: <nobr>
                    295: Problem Status:
                    296: <select name='problemstate'>
1.270     albertel  297:   <option value=''></option>
1.235     albertel  298:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    299:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    300:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    301:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    302:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    303: </select>
                    304: </nobr>
                    305: <nobr>
                    306: Problem Type:
                    307: <select name='problemtype'>
1.270     albertel  308:   <option value=''></option>
1.242     albertel  309:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
                    310:   ".&option('problem','problemtype').&mt("Homework problem")."</option>
                    311:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.235     albertel  312: </select>
                    313: </nobr>
                    314: <nobr>
                    315: Feedback Mode:
                    316: <select name='problemstatus'>
                    317:   <option value=''></option>
1.242     albertel  318:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
                    319:   ".&option('no', 'problemstatus').&mt("Don't Show Feedback")."</option>
1.235     albertel  320: </select>
                    321: </nobr>
1.242     albertel  322: <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
1.235     albertel  323: <hr />";
1.313     albertel  324: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    325: 	if (!$numtoanalyze) { $numtoanalyze=20; }
                    326: 	$result.= '<input type="submit" name="problemmode" value='.
                    327: 	    &mt('"Calculate answers').'" /> for
1.136     albertel  328:              <input type="text" name="numtoanalyze" value="'.
1.210     albertel  329: 	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
                    330: 	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
1.176     albertel  331: 						     '',undef,undef,300).
1.210     albertel  332: 						     '<hr />';
1.313     albertel  333:     }
1.159     albertel  334:     return $result;
1.48      albertel  335: }
                    336: 
1.65      albertel  337: sub initialize_storage {
1.159     albertel  338:     %Apache::lonhomework::results=();
1.162     albertel  339:     %Apache::lonhomework::history=();
1.159     albertel  340:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.333     albertel  341:     if ($env{'request.state'} eq 'construct' 
                    342: 	|| $symb eq ''
                    343: 	|| $Apache::lonhomework::type eq 'practice') {
                    344: 	
                    345: 	my $namespace = $symb || $env{'request.uri'};
                    346: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
                    347: 	    $env{'form.resetdata'} eq &mt('New Problem Variation') ||
                    348: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    349: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    350: 	    &Apache::lonxml::debug("Attempt reset");
                    351: 	}
1.159     albertel  352: 	%Apache::lonhomework::history=
1.333     albertel  353: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  354: 	my ($temp)=keys %Apache::lonhomework::history ;
                    355: 	&Apache::lonxml::debug("Return message of $temp");
                    356:     } else {
                    357: 	%Apache::lonhomework::history=
                    358: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    359:     }
                    360:     #ignore error conditions
1.67      albertel  361:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  362:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  363: }
                    364: 
                    365: # -------------------------------------------------------------finalize_storage
                    366: # Stores away the result has to a student's environment
                    367: # checks form.grade_ for specific values, other wises stores
                    368: # to the running users environment
1.285     raeburn   369: # Will increment totals for attempts, students, and corrects
                    370: # if running user has student role.  
1.65      albertel  371: sub finalize_storage {
1.159     albertel  372:     my $result;
1.289     albertel  373:     if (%Apache::lonhomework::results) {
1.323     albertel  374: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    375: 	delete(@Apache::lonhomework::results{@remove});
1.159     albertel  376: 	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.333     albertel  377: 	if ($env{'request.state'} eq 'construct' 
                    378: 	    || $symb eq ''
                    379: 	    || $Apache::lonhomework::type eq 'practice') {
                    380: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  381: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  382: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  383: 					      $namespace,'',$domain,$name);
1.159     albertel  384: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    385: 	} else {
                    386: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    387: 					    $symb,$courseid,$domain,$name);
                    388: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   389:             if ($env{'request.role'} =~/^st/) {
                    390:                 &store_aggregates($symb,$courseid);
                    391:             }
1.159     albertel  392: 	}
1.323     albertel  393:     } else {
                    394: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  395:     }
1.159     albertel  396:     return $result;
1.65      albertel  397: }
1.289     albertel  398: use Data::Dumper;
1.65      albertel  399: 
1.285     raeburn   400: # -------------------------------------------------------------store_aggregates
                    401: # Sends hash of values to be incremented in nohist_resourcetracker.db
                    402: # for the course. Increments total number of attempts, unique students 
                    403: # and corrects for each part for an instance of a problem, as appropriate.
                    404: sub store_aggregates {
                    405:     my ($symb,$courseid) = @_;
1.286     albertel  406:     my %aggregate;
                    407:     my @parts;
1.288     albertel  408:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    409:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  410:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  411:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  412:             push(@parts, $1);
1.285     raeburn   413:         }
                    414:     }
1.286     albertel  415:     foreach my $part (@parts) {
                    416:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    417: 	    eq 'APPROX_ANS' ||
                    418: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    419: 	    eq 'EXACT_ANS') {
1.287     albertel  420:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   421:         }
1.286     albertel  422:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  423:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   424:         } else {
1.293     albertel  425:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   426:             if ($last_reset) {
1.293     albertel  427:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   428:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    429:                 }
                    430:             }
1.285     raeburn   431:         }
1.287     albertel  432:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   433:     }
1.292     raeburn   434:     if (keys (%aggregate) > 0) {
1.289     albertel  435: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   436:                             $cdomain,$cname);
                    437:     }
                    438: }
1.289     albertel  439: 
1.65      albertel  440: sub checkout_msg {
1.211     albertel  441:     my %lt=&Apache::lonlocal::texthash( 
                    442: 		'resource'=>'The resource needs to be checked out',
                    443: 		'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.',
                    444:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    445:                 'checkout'=>'Check out Exam for Viewing',
                    446: 		'checkout?'=>'Check out Exam?');
1.159     albertel  447:     return (<<ENDCHECKOUT);
1.211     albertel  448: <h2>$lt{'resource'}</h2>
                    449:     <p>$lt{'id_expln'}</p>
                    450: <font color="red">
                    451: <p>$lt{'warning'}</p>
1.91      albertel  452: </font>
1.284     albertel  453: <form name="checkout" method="POST" action="$env{'request.uri'}">
1.91      albertel  454: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  455: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  456: </form>
                    457: ENDCHECKOUT
                    458: }
                    459: 
1.252     albertel  460: sub firstaccess_msg {
1.253     albertel  461:     my ($time,$symb)=@_;
                    462:     my ($map)=&Apache::lonnet::decode_symb($symb);
                    463:     my $foldertitle=&Apache::lonnet::gettitle($map);
                    464:     &Apache::lonxml::debug("map is $map title is $foldertitle");
1.252     albertel  465:     return (<<ENDCHECKOUT);
1.253     albertel  466: <h2>The resources in "$foldertitle" are open for a limited time. Once you click the 'Show Resource' button below you have $time to complete all resources "$foldertitle".</h2>
1.284     albertel  467: <form name="markaccess" method="POST" action="$env{'request.uri'}">
1.252     albertel  468: <input type="hidden" name="markaccess" value="yes" />
                    469: <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
                    470: </form>
                    471: ENDCHECKOUT
                    472: }
                    473: 
1.204     albertel  474: sub init_problem_globals {
                    475:     my ($type)=@_;
                    476:     #initialize globals
1.308     foxr      477:     #   For problems, we start out in part 0 (outside a <part> tag).
                    478:     #   and part 0 is used to describe the main body of the <problem>
                    479:     #
1.204     albertel  480:     if ($type eq 'problem') {
                    481: 	$Apache::inputtags::part='0';
                    482: 	@Apache::inputtags::partlist=('0');
1.266     albertel  483: 	$Apache::lonhomework::problemstatus=&get_problem_status('0');
                    484: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      485: 
1.266     albertel  486:     } elsif ($type eq 'library') {
1.204     albertel  487: 	$Apache::inputtags::part='';
                    488: 	@Apache::inputtags::partlist=();
                    489: 	$Apache::lonhomework::problemstatus='';	
1.266     albertel  490: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      491: 
1.304     albertel  492:     } elsif ($type eq 'Task') {
                    493: 	$Apache::inputtags::part='0';
                    494: 	@Apache::inputtags::partlist=('0');
                    495: 	$Apache::lonhomework::problemstatus='';	
                    496: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  497:     }
                    498:     @Apache::inputtags::responselist = ();
                    499:     @Apache::inputtags::importlist = ();
                    500:     @Apache::inputtags::previous=();
                    501:     @Apache::inputtags::previous_version=();
                    502:     $Apache::structuretags::printanswer='No';
                    503:     @Apache::structuretags::whileconds=();
                    504:     @Apache::structuretags::whilebody=();
                    505:     @Apache::structuretags::whileline=();
                    506:     $Apache::lonhomework::scantronmode=0;
                    507:     undef($Apache::lonhomework::name);
                    508: 
                    509: }
                    510: 
                    511: sub reset_problem_globals {
                    512:     my ($type)=@_;
                    513:     undef(%Apache::lonhomework::history);
                    514:     undef(%Apache::lonhomework::results);
                    515:     undef($Apache::inputtags::part);
1.208     albertel  516: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    517: #detect if we try to do 2 problems in one file
                    518: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  519:     undef($Apache::lonhomework::name);
                    520: }
                    521: 
1.241     albertel  522: sub set_problem_state {
1.240     albertel  523:     my ($part)=@_;
1.284     albertel  524:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  525: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    526: 	    'correct_by_student';
                    527:     }
                    528: }
                    529: 
1.241     albertel  530: sub get_problem_status {
                    531:     my ($part)=@_;
1.267     albertel  532:     my $problem_status;
1.284     albertel  533:     if ($env{'request.state'} eq 'construct' &&
                    534: 	defined($env{'form.problemstatus'})) {
                    535: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  536:     } else {
                    537: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    538: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  539: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  540:     }
                    541:     return $problem_status;
                    542: }
                    543: 
1.9       albertel  544: sub start_problem {
1.326     albertel  545:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel  546: 
1.311     foxr      547:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  548:     if (!$Apache::lonxml::metamode) {
                    549: 	&Apache::lonxml::startredirection();
                    550:     }
1.311     foxr      551: 
1.308     foxr      552:     # Problems don't nest and we don't allow more than one <problem> in
                    553:     # a .problem file.
                    554:     #
1.184     albertel  555:     if ( $Apache::inputtags::part ne '' ||
                    556: 	 $Apache::lonhomework::parsing_a_problem) {
                    557: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel  558: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel  559: 	return '';
                    560:     }
1.184     albertel  561: 
                    562:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  563:     &init_problem_globals('problem');
1.166     albertel  564: 
1.284     albertel  565:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  566: 	$Apache::lonhomework::scantronmode=1;
                    567:     }
1.161     albertel  568: 
1.246     albertel  569:     &initialize_storage();
1.159     albertel  570:     if ($target ne 'analyze') {
                    571: 	if ($target eq 'web') {
                    572: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
1.238     albertel  573: 	}
1.284     albertel  574:        	if ($env{'request.state'} eq 'construct') { &set_problem_state('0'); }
1.159     albertel  575: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.284     albertel  576: 	if (($env{'request.state'} eq 'construct') &&
                    577: 	    defined($env{'form.problemtype'})) {
                    578: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  579: 	}
1.332     albertel  580: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  581:     }
1.164     albertel  582:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  583: 	my $uri=$env{'request.uri'};
1.159     albertel  584: 	if ($uri=~/\.(\w+)$/) {
                    585: 	    $Apache::lonhomework::type=$1;
                    586: 	    &Apache::lonxml::debug("Using type of $1");
                    587: 	} else {
                    588: 	    $Apache::lonhomework::type='problem';
                    589: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    590: 	}
1.87      albertel  591:     }
1.301     albertel  592:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       593: 
1.159     albertel  594:     #added vars to the scripting enviroment
1.213     albertel  595:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  596:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  597:     &Apache::run::run($expression,$safeeval);
1.159     albertel  598:     my $status;
                    599:     my $accessmsg;
                    600: 
                    601:     #should get back a <html> or the neccesary stuff to start XML/MathML
                    602:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    603: 	&page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
1.284     albertel  604:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  605: 
                    606:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    607:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    608: 	$target eq 'tex') {
                    609: 	#handle exam checkout
                    610: 	if ($Apache::lonhomework::type eq 'exam') {
                    611: 	    my $token=
                    612: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  613: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  614: 		$token=&Apache::lonxml::maketoken();
                    615: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    616: 		    $token;
                    617: 	    }
                    618: 	    $body_tag_start.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  619: 	}
1.284     albertel  620: 	if ($env{'form.markaccess'}) {
1.252     albertel  621: 	    &Apache::lonnet::set_first_access('map');
                    622: 	}
1.159     albertel  623: 	#handle rand seed in construction space
                    624: 	my $rndseed=&setup_rndseed($safeeval);
1.162     albertel  625: 	my ($symb)=&Apache::lonxml::whichuser();
1.333     albertel  626: 	if ($env{'request.state'} ne "construct" && 
                    627: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  628: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    629: 		$rndseed.'" />'.
                    630: 		    '<input type="submit" name="resetdata"
1.334     albertel  631:                              value="'.&mt('New Problem Variation').'" />';
                    632: 	    if (exists($env{'form.username'})) {
                    633: 		$form_tag_start.=
1.164     albertel  634: 		    '<input type="hidden" name="username"
1.284     albertel  635:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  636: 	    }
1.333     albertel  637: 	    if ($env{'request.role.adv'}) {
1.267     albertel  638: 		$form_tag_start.=
1.300     albertel  639: 		    ' <label><input type="checkbox" name="showallfoils" ';
1.284     albertel  640: 		if (defined($env{'form.showallfoils'})) {
1.267     albertel  641: 		    $form_tag_start.='checked="on"';
                    642: 		}
1.300     albertel  643: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    644: 		    '</label>';
1.267     albertel  645: 	    }
                    646: 	    $form_tag_start.='<hr />';
1.162     albertel  647: 	}
1.324     albertel  648: 
                    649: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    650: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  651: 	push (@Apache::inputtags::status,$status);
1.324     albertel  652: 
1.159     albertel  653: 	my $expression='$external::datestatus="'.$status.'";';
                    654: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    655: 	&Apache::run::run($expression,$safeeval);
                    656: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  657: 
1.159     albertel  658: 	if (( $status eq 'CLOSED' ) ||
                    659: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  660: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  661: 	    ( $status eq 'BANNED') ||
1.216     albertel  662: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  663: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  664: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  665: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    666: 						       $style);
1.159     albertel  667: 	    if ( $target eq "web" ) {
                    668: 		$result.= $head_tag_start.'</head>';
                    669: 		my $msg=$body_tag_start;
                    670: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  671: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  672: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  673: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  674: 		}
1.216     albertel  675: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.159     albertel  676: 		    $msg.='The problem '.$accessmsg;
                    677: 		} elsif ($status eq 'UNCHECKEDOUT') {
                    678: 		    $msg.=&checkout_msg;
1.252     albertel  679: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  680: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  681: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
                    682: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work.");
1.159     albertel  683: 		}
                    684: 		$result.=$msg.'<br />';
                    685: 	    } elsif ($target eq 'tex') {
1.332     albertel  686: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    687: 		                    : '\begin{minipage}{\textwidth}';
                    688: 		$result.='\begin{document}\noindent \vskip 1 mm '.
                    689: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  690: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  691: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  692: 		} else {
1.211     albertel  693: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  694: 		}
                    695: 	    }
1.324     albertel  696: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  697: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    698: 						       $style);
1.324     albertel  699: 	    if ($target eq 'web') {
                    700: 		$result .= $head_tag_start.'</head>';
                    701: 		$result .= $body_tag_start;
                    702: 		$result .= &Apache::bridgetask::proctor_validation_screen();
                    703: 	    } elsif ($target eq 'grade') {
                    704: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                    705: 							'problem');
                    706: 	    }
1.159     albertel  707: 	} elsif ($target eq 'web') {
                    708: 	    my $name= &get_resource_name($parstack,$safeeval);
1.227     albertel  709: 	    $result.="$head_tag_start<title>$name</title></head>
1.158     sakharuk  710:               $body_tag_start \n $form_tag_start".	
1.227     albertel  711: 	      '<input type="hidden" name="submitted" value="yes" />';
                    712: 	    # create a page header and exit
1.284     albertel  713: 	    if ($env{'request.state'} eq "construct") {
                    714: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.227     albertel  715: 	    }
                    716: 	    # if we are viewing someone else preserve that info
1.284     albertel  717: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel  718: 		foreach my $field ('symb','courseid','domain','username') {
                    719: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel  720: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel  721: 		}
                    722: 	    }
                    723: 	} elsif ($target eq 'tex') {
1.319     foxr      724: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                    725: 
1.99      sakharuk  726: 	}
1.159     albertel  727:     } elsif ($target eq 'edit') {
                    728: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    729: 	    &problem_edit_header();
1.226     albertel  730: 	$Apache::lonxml::warnings_error_header=
                    731: 	    &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  732: 	my $temp=&Apache::edit::insertlist($target,$token);
                    733: 	$result.=$temp;
                    734:     } elsif ($target eq 'modified') {
                    735: 	$result=$token->[4];
                    736: 	$result.=&Apache::edit::handle_insert();
                    737:     } else {
                    738: 	# page_start returned a starting result, delete it if we don't need it
                    739: 	$result = '';
1.99      sakharuk  740:     }
1.159     albertel  741:     return $result;
1.9       albertel  742: }
                    743: 
                    744: sub end_problem {
1.159     albertel  745:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel  746:     my $result;
1.310     foxr      747: 
1.321     albertel  748:     if (!$Apache::lonxml::metamode) {
                    749: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel  750: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel  751:     }
1.319     foxr      752: 
                    753:     if ($target eq 'tex') {
1.321     albertel  754: 
                    755: 	# Figure out the front matter and replace the
                    756: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                    757: 	# this in end_problem because whether or not we display due
                    758: 	# dates depends on whether due dates have already been
                    759: 	# displayed in the problem parts.
                    760: 
1.319     foxr      761: 	my $frontmatter   = '';
                    762: 	my $startminipage = '';
                    763: 	if (not $env{'form.problem_split'}=~/yes/) {
                    764: 	    $startminipage = '\begin{minipage}{\textwidth}';
                    765: 	}
                    766: 	my $id = $Apache::inputtags::part;
                    767: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                    768: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                    769: 	my @packages = split /,/,$packages;
                    770: 	my $allow_print_points = 0;
                    771: 	foreach my $partial_key (@packages) {
                    772: 	    if ($partial_key=~m/^part_0$/) {
                    773: 		$allow_print_points=1;
                    774: 	    }
                    775: 	}
                    776: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    777: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                    778: 	if (lc($env{'course.'.$env{'request.course.id'}.
                    779: 			'.disableexampointprint'}) eq 'yes') {
                    780: 	    $allow_print_points=0;
                    781: 	}
                    782: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
                    783: 	my $begin_doc='\begin{document} \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent ';
                    784: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                    785: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                    786: 	
                    787: 	#  Figure out what the due date is and if we need to print
                    788: 	#  it in the problem header.  We have been logging the
                    789: 	#  last due date written to file. 
                    790: 	
                    791: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    792: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
                    793: 	my $temp_file;
                    794: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                    795: 	
                    796: 	# Figure out what the last printed due date is or set it
                    797: 	# to the epoch if no duedates have been printed.
                    798: 	
                    799: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                    800: 	if (-e $filename) {
                    801: 	    $temp_file = Apache::File->new($filename);
                    802: 	    my @due_file      = <$temp_file>;
                    803: 	    $due_file_content = $due_file[$#due_file];
                    804: 	    chomp $due_file_content;
                    805: 	} 
                    806: 	
                    807: 	# We display the due date iff it is not the same as the last
                    808: 	# duedate in problem header ($due_file_content), and
                    809: 	# none of our parts displayed a duedate.
                    810: 	#
                    811: 	my $parts_with_displayduedate;
                    812: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                    813: 	    $parts_with_displayduedate = 
                    814: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                    815: 	} else {
                    816: 	    $parts_with_displayduedate = 0;
                    817: 	}
                    818: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                    819: 	    $temp_file = Apache::File->new('>'.$filename);
                    820: 	    print $temp_file "$duetime\n";
                    821: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    822: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                    823: 		    $frontmatter .= $begin_doc.
                    824: 			'\textit{Due date: '.$duedate.'} '.$toc_line;
                    825: 		} else {
                    826: 		    $frontmatter.= $begin_doc.$toc_line;
                    827: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    828: 		}
                    829: 	    } else {
                    830: 		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
                    831: 	    }
                    832: 	} else {
                    833: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    834: 		$frontmatter .= $begin_doc.$toc_line;
                    835: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    836: 	    } else {
                    837: 		$frontmatter .= '\vskip 1mm \\\\\\\\';
                    838: 	    }
                    839: 	}
                    840: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                    841:     }
                    842: 
1.159     albertel  843:     my $status=$Apache::inputtags::status['-1'];
                    844:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    845: 	$target eq 'tex') {
1.249     albertel  846: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel  847: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel  848: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                    849: 		&Apache::inputtags::grade;
1.324     albertel  850: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                    851: 		# no need to grade, and don't want to hide data
1.249     albertel  852: 	    } else {
                    853: 		# move any submission data to .hidden
                    854: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                    855: 	    }
1.159     albertel  856: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    857: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel  858: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel  859: 	    # if part is zero, no <part>s existed, so we need show the current
                    860: 	    # grading status
                    861: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    862: 	    $result.= $gradestatus;
                    863: 	}
                    864: 	if (
1.284     albertel  865: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel  866: 	    ($target eq 'answer') || ($target eq 'tex')
                    867: 	   ) {
1.227     albertel  868: 	    if ($target ne 'tex' &&
1.284     albertel  869: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www       870: 		$result.="</form>";
                    871: 		$result.=&Apache::lonhtmlcommon::htmlareaselectactive(@Apache::lonxml::htmlareafields);
1.159     albertel  872: 	    }
                    873: 	    if ($target eq 'web') {
1.281     albertel  874: 		$result.=&Apache::lonxml::xmlend().'</html>';
1.159     albertel  875: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  876: 		my $endminipage = '';
1.284     albertel  877: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk  878: 		    $endminipage = '\end{minipage}';
                    879: 		}
1.284     albertel  880:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk  881: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.257     sakharuk  882: 		    $result=~s/<\/html>//;
1.159     albertel  883: 		} else {
1.262     sakharuk  884: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel  885: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk  886: 			$result .= $endminipage.'\end{document} ';
                    887: 		    } else {
                    888: 			$result .= '';
                    889: 		    }
1.159     albertel  890: 		}
                    891: 	    }
                    892: 	}
                    893: 	if ($target eq 'grade') {
                    894: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    895: 	    &finalize_storage();
                    896: 	}
1.284     albertel  897: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                    898: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.294     albertel  899: 	    $result.=&Apache::lonxml::xmlend().'</html>';
                    900: 	                        # normally we get it from above, but in CSTR
1.172     albertel  901: 	                        # we always show answer mode too.
1.159     albertel  902: 	}
                    903:     } elsif ($target eq 'meta') {
                    904: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  905: 	    @Apache::inputtags::response=();
1.159     albertel  906: 	    $result=&Apache::response::mandatory_part_meta;
                    907: 	}
1.215     albertel  908: 	$result.=&Apache::response::meta_part_order();
1.258     albertel  909: 	$result.=&Apache::response::meta_response_order();
1.159     albertel  910:     } elsif ($target eq 'edit') {
                    911: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel  912: 	$result .= &problem_edit_footer();
1.320     albertel  913:     } elsif ($target eq 'modified') {
                    914: 	 $result .= $token->[2];
                    915: 	 $result.=&Apache::edit::handle_insertafter($token->[1]);
1.159     albertel  916:     }
1.155     albertel  917: 
1.284     albertel  918:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel  919: 	&Apache::inputtags::check_for_duplicate_ids();
                    920:     }
1.204     albertel  921: 
                    922:     &reset_problem_globals('problem');
1.159     albertel  923: 
                    924:     return $result;
1.48      albertel  925: }
                    926: 
1.108     albertel  927: 
1.48      albertel  928: sub start_library {
1.159     albertel  929:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    930:     my ($result,$head_tag_start,$body_tag_start,$form_tag_start);
1.244     albertel  931:     if ($$tagstack[0] eq 'library') {
                    932: 	&init_problem_globals('library');
                    933: 	$Apache::lonhomework::type='problem';
                    934:     }
1.159     albertel  935:     if ($target eq 'edit') {
                    936: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    937: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    938: 	$result.=$head_tag_start."</head>".$body_tag_start.$form_tag_start.
                    939: 	    &problem_edit_header();
                    940: 	my $temp=&Apache::edit::insertlist($target,$token);
                    941: 	$result.=$temp;
                    942:     } elsif ($target eq 'modified') {
                    943: 	$result=$token->[4];
                    944: 	$result.=&Apache::edit::handle_insert();
                    945:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel  946: 	     $env{'request.state'} eq "construct" ) {
1.159     albertel  947: 	($result,$head_tag_start,$body_tag_start,$form_tag_start)=
                    948: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval);
                    949: 	my $name=&get_resource_name($parstack,$safeeval);
                    950: 	my $rndseed=&setup_rndseed($safeeval);
                    951: 	$result.="$head_tag_start<title>$name</title></head>
1.105     albertel  952:               $body_tag_start \n $form_tag_start".	
1.159     albertel  953: 		  '<input type="hidden" name="submitted" value="yes" />';
                    954: 	$result.=&problem_web_to_edit_header($rndseed);
                    955:     }
                    956:     return $result;
1.48      albertel  957: }
                    958: 
                    959: sub end_library {
1.159     albertel  960:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    961:     my $result='';
                    962:     if ($target eq 'edit') {
                    963: 	$result=&problem_edit_footer();
                    964:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel  965: 	     $env{'request.state'} eq "construct") {
1.280     albertel  966: 	$result.='</form>'.&Apache::loncommon::endbodytag().
                    967: 	    &Apache::lonxml::xmlend();
1.159     albertel  968:     }
1.204     albertel  969:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel  970:     return $result;
1.197     www       971: }
                    972: 
                    973: sub start_definetag {
1.326     albertel  974:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www       975: 
                    976:     my $result;
                    977: 
                    978:     my $name = $token->[2]->{'name'};
1.326     albertel  979:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.197     www       980:     if ($name=~/^\//) {
                    981: 	$result=
                    982:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                    983:     } else {
                    984: 	$result=
                    985:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                    986:     }
                    987:     $skip=~s/\</\&lt\;/gs;
                    988:     $skip=~s/\>/\&gt\;/gs;
                    989:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                    990:     return $result;
                    991: }
                    992: 
                    993: sub end_definetag {
                    994:     return '';
1.1       albertel  995: }
                    996: 
                    997: sub start_block {
1.201     albertel  998:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel  999: 
                   1000:     my $result;
1.1       albertel 1001: 
1.339   ! albertel 1002:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
        !          1003: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1004: 	my $code = $token->[2]->{'condition'};
1.201     albertel 1005: 	if (defined($code)) {
1.137     albertel 1006: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1007: 		&Apache::lonxml::default_homework_load($safeeval);
                   1008: 	    }
1.131     albertel 1009: 	    $result = &Apache::run::run($code,$safeeval);
                   1010: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1011: 	} else {
                   1012: 	    $result='1';
                   1013: 	}
                   1014: 	if ( ! $result ) {
1.201     albertel 1015: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1016: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1017: 	}
                   1018: 	$result='';
                   1019:     } elsif ($target eq 'edit') {
                   1020: 	$result .=&Apache::edit::tag_start($target,$token);
                   1021: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1022: 					  $token,40);
                   1023: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1024:     } elsif ($target eq 'modified') {
                   1025: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1026: 						     $safeeval,'condition');
                   1027: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1028:     }
1.131     albertel 1029:     return $result;
1.1       albertel 1030: }
                   1031: 
                   1032: sub end_block {
1.167     www      1033:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1034:     my $result;
                   1035:     if ($target eq "edit") {
                   1036: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1037:     }
                   1038:     return $result;
                   1039: }
                   1040: 
                   1041: sub start_languageblock {
1.201     albertel 1042:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1043: 
                   1044:     my $result;
                   1045: 
1.339   ! albertel 1046:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
        !          1047: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1048: 	my $include = $token->[2]->{'include'};
                   1049: 	my $exclude = $token->[2]->{'exclude'};
                   1050:         my %languages=&Apache::loncommon::display_languages();
                   1051:         $result='1';
                   1052: 	if ($include) {
                   1053:             $result='';
                   1054:             foreach (split(/\,/,$include)) {
                   1055:                 if ($languages{$_}) { $result='1'; }
                   1056:             }
                   1057: 	}
                   1058:         if ($exclude) {
                   1059:             foreach (split(/\,/,$exclude)) {
                   1060:                 if ($languages{$_}) { $result='0'; }
                   1061:             }
                   1062: 	}
                   1063: 	if ( ! $result ) {
                   1064: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1065: 						   $style);
                   1066: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1067: 	}
                   1068: 	$result='';
1.167     www      1069:     } elsif ($target eq 'edit') {
                   1070: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1071: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1072: 					  $token,40);
1.211     albertel 1073: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1074: 					  $token,40);
                   1075: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1076:     } elsif ($target eq 'modified') {
                   1077: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1078: 						     $safeeval,'include',
                   1079: 						     'exclude');
1.167     www      1080: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1081:     }
                   1082:     return $result;
                   1083: }
                   1084: 
                   1085: sub end_languageblock {
1.170     www      1086:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1087:     my $result;
1.201     albertel 1088:     if ($target eq "edit") {
1.170     www      1089: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1090:     }
                   1091:     return $result;
                   1092: }
                   1093: 
                   1094: sub start_instructorcomment {
1.201     albertel 1095:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1096: 
                   1097:     my $result;
                   1098: 
1.339   ! albertel 1099:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
        !          1100: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.284     albertel 1101:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1102: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1103: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1104: 						   $parser,$style);
1.170     www      1105: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1106: 	}
                   1107: 	$result='';
                   1108:     } elsif ($target eq 'edit') {
                   1109: 	$result .=&Apache::edit::tag_start($target,$token);
                   1110: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1111:     }
                   1112:     return $result;
                   1113: }
                   1114: 
                   1115: sub end_instructorcomment {
1.159     albertel 1116:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1117:     my $result;
                   1118:     if ($target eq "edit") {
                   1119: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1120:     }
                   1121:     return $result;
1.4       tsai     1122: }
                   1123: 
                   1124: sub start_while {
1.326     albertel 1125:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1126: 
1.160     albertel 1127:     my $result;
1.339   ! albertel 1128:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
        !          1129: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1130: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1131: 
1.160     albertel 1132: 	push( @Apache::structuretags::whileconds, $code);
                   1133: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1134: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1135: 	}
                   1136: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1137: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1138: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1139: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1140: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1141: 	if ( $result ) {
                   1142: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1143: 	}
                   1144:     } elsif ($target eq 'edit') {
                   1145: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1146: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1147: 					  $token,40);
                   1148: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1149:     } elsif ($target eq 'modified') {
                   1150: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1151: 						     $safeeval,'condition');
                   1152: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1153:     }
1.160     albertel 1154:     return $result;
1.4       tsai     1155: }
                   1156: 
                   1157: sub end_while {
1.159     albertel 1158:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1159:     my $result;
                   1160: 
1.339   ! albertel 1161:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
        !          1162: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1163: 	my $code = pop(@Apache::structuretags::whileconds);
                   1164: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1165: 	my $line = pop(@Apache::structuretags::whileline);
                   1166: 	my $return = &Apache::run::run($code,$safeeval);
                   1167: 	my $starttime=time;
                   1168: 	my $error=0;
                   1169: 	while ($return) {
                   1170: 	    if (time-$starttime >
                   1171: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.270     albertel 1172: 		#$return = 0; $error=1; next;
1.161     albertel 1173: 	    }
                   1174: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                   1175: 	    $return = &Apache::run::run($code,$safeeval);
                   1176: 	}
                   1177: 	if ($error) {
1.270     albertel 1178: 	    &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 1179: 	}
                   1180:     } elsif ($target eq "edit") {
                   1181: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1182:     }
1.160     albertel 1183:     return $result;
1.1       albertel 1184: }
1.6       tsai     1185: 
1.160     albertel 1186: # <randomlist show="1">
1.6       tsai     1187: #  <tag1>..</tag1>
                   1188: #  <tag2>..</tag2>
                   1189: #  <tag3>..</tag3>
1.160     albertel 1190: #  ...
1.6       tsai     1191: # </randomlist>
                   1192: sub start_randomlist {
1.326     albertel 1193:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1194:     my $result;
1.339   ! albertel 1195:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
        !          1196: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1197: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1198: 	my $b_parser= HTML::LCParser->new(\$body);
                   1199: 	$b_parser->xml_mode(1);
                   1200: 	$b_parser->marked_sections(1);
1.159     albertel 1201: 	my $b_tok;
                   1202: 	my @randomlist;
                   1203: 	my $list_item;
                   1204: 	while($b_tok = $b_parser->get_token() ) {
                   1205: 	    if($b_tok->[0] eq 'S') { # start tag
                   1206: 		# get content of the tag until matching end tag
                   1207: 		# get all text upto the matching tag
                   1208: 		# and push the content into @randomlist
                   1209: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1210: 							   $b_parser);
                   1211: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1212: 		push(@randomlist,$list_item);
                   1213: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1214:                 #         $list_item</b>";
                   1215: 	    }
                   1216: 	    if($b_tok->[0] eq 'T') { # text
                   1217: 		# what to do with text in between tags?
                   1218: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1219: 	    }
                   1220: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1221: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1222: 	    # }
                   1223: 	}
1.303     albertel 1224: 	if (@randomlist) {
                   1225: 	    my @idx_arr = (0 .. $#randomlist);
                   1226: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1227: 	    my $bodytext = '';
                   1228: 	    my $show=$#randomlist;
                   1229: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1230: 	    $showarg--;
                   1231: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                   1232: 	    for(0 .. $show) {
                   1233: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1234: 	    }
                   1235: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1236: 	}
                   1237:     } elsif ($target eq 'edit' ) {
                   1238: 	$result .=&Apache::edit::tag_start($target,$token);
                   1239: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1240: 					   $token,5);
                   1241: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1242:     } elsif ($target eq 'modified' ) {
                   1243: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1244: 						     $safeeval,'show');
                   1245: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1246:     }
                   1247:     return $result;
1.7       tsai     1248: }
                   1249: 
                   1250: sub shuffle {
                   1251:     my $a=shift;
                   1252:     my $i;
1.303     albertel 1253:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1254: 	&Apache::response::pushrandomnumber();
1.159     albertel 1255: 	for($i=@$a;--$i;) {
                   1256: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1257: 	    next if $i == $j;
                   1258: 	    @$a[$i,$j] = @$a[$j,$i];
                   1259: 	}
1.251     albertel 1260: 	&Apache::response::poprandomnumber();
1.7       tsai     1261:     }
1.6       tsai     1262: }
                   1263: 
                   1264: sub end_randomlist {
1.159     albertel 1265:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1266:     my $result;
                   1267:     if ($target eq 'edit' ) {
                   1268: 	$result=&Apache::edit::tag_end($target,$token,
                   1269: 				       'End Randomly Parsed Block');
                   1270:     }
                   1271:     return $result;
1.6       tsai     1272: }
                   1273: 
1.283     albertel 1274: sub ordered_show_check {
                   1275:     my $last_part=$Apache::inputtags::partlist[-2];
                   1276:     my $in_order=
                   1277: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1278:     my $in_order_show=1;
                   1279:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1280: 	$in_order_show=&Apache::response::check_status($last_part);
                   1281:     }
                   1282:     return $in_order_show;
                   1283: }
                   1284: 
1.11      albertel 1285: sub start_part {
1.326     albertel 1286:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1287:     if (!$Apache::lonxml::metamode) {
                   1288: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1289: 	                                     # duedates.
                   1290:     }
1.159     albertel 1291:     my $result='';
                   1292:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1.296     albertel 1293:     if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1.159     albertel 1294:     $Apache::inputtags::part=$id;
1.177     albertel 1295:     push(@Apache::inputtags::partlist,$id);
                   1296:     @Apache::inputtags::response=();
1.159     albertel 1297:     @Apache::inputtags::previous=();
                   1298:     @Apache::inputtags::previous_version=();
1.241     albertel 1299:     $Apache::lonhomework::problemstatus=&get_problem_status($id);
1.159     albertel 1300:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1301:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1302:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1303:     my $in_order_show=&ordered_show_check();
1.214     albertel 1304:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1305:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1306:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1307: 
                   1308:     if ($target eq 'meta') {
1.224     www      1309: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1310: 	return &Apache::response::mandatory_part_meta.
                   1311: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1312:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1313: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1314: 	if ($hidden || !$in_order_show) {
1.326     albertel 1315: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1316: 	} else {
                   1317: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1318: 	    push (@Apache::inputtags::status,$status);
                   1319: 	    my $expression='$external::datestatus="'.$status.'";';
                   1320: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1321: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1322: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1323: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1324: 	    }
1.216     albertel 1325: 	    if (( $status eq 'CLOSED' ) ||
                   1326: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1327: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1328: 		( $status eq 'BANNED') ||
                   1329: 		( $status eq 'UNAVAILABLE') ||
                   1330: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1331: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1332: 							   $style);
1.159     albertel 1333: 		if ( $target eq "web" ) {
1.211     albertel 1334: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1335: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1336: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1337: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1338: 		    } else {
1.211     albertel 1339: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1340: 		    }
1.159     albertel 1341: 		}
                   1342: 	    } else {
                   1343: 		if ($target eq 'tex') {
1.284     albertel 1344: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1345: 			if ($$tagstack[-2] eq 'td') {
                   1346: 			    $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1347: 			} else {
                   1348: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1349: 			}
1.195     sakharuk 1350: 		    }
1.159     albertel 1351: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1352: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1353: 		    my @allkeys = split /,/,$allkeys;
                   1354: 		    my $allow_print_points = 0;
                   1355: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1356: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1357: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1358: 			}
                   1359: 		    }
1.275     albertel 1360: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1361: 		    if (defined($maxtries) && $maxtries < 0) {
                   1362: 			$allow_print_points=0;
                   1363: 		    }
1.302     albertel 1364: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1365: 				    '.disableexampointprint'}) eq 'yes') {
                   1366: 			$allow_print_points=0;
                   1367: 		    }
1.222     sakharuk 1368: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1369: 		} elsif ($target eq 'web') {
                   1370: 		    $result.='<a name="'.&Apache::lonnet::escape($Apache::inputtags::part).'" />';
1.159     albertel 1371: 		}
                   1372: 	    }
                   1373: 	}
                   1374:     } elsif ($target eq 'edit') {
                   1375: 	$result.=&Apache::edit::tag_start($target,$token);
                   1376: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1377: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1378: 	    '&nbsp;&nbsp;'.
                   1379: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1380: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1381:     } elsif ($target eq 'modified') {
                   1382: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1383: 						     $safeeval,'id','display');
1.159     albertel 1384: 	if ($constructtag) {
1.225     albertel 1385: 	    #limiting ids to only letters numbers, and space
1.224     www      1386: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1387: 	    $result = &Apache::edit::rebuild_tag($token);
                   1388: 	    $result.=&Apache::edit::handle_insert();
                   1389: 	}
                   1390:     }
                   1391:     return $result;
1.11      albertel 1392: }
                   1393: 
                   1394: sub end_part {
1.159     albertel 1395:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1396:     &Apache::lonxml::debug("in end_part $target ");
                   1397:     my $status=$Apache::inputtags::status['-1'];
                   1398:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1399:     my $in_order_show=&ordered_show_check();
1.321     albertel 1400:     my $result;
                   1401:     if (!$Apache::lonxml::metamode) {
                   1402: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1403: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1404:     }
1.312     albertel 1405:     if ($target eq 'grade') {
1.249     albertel 1406: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1407: 	    !$hidden && $in_order_show) {
1.311     foxr     1408: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1409: 	} else {
                   1410: 	    # move any submission data to .hidden
                   1411: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1412: 	}
1.283     albertel 1413:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1414: 	     !$hidden && $in_order_show) {
1.159     albertel 1415: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1416: 							$target);
1.212     albertel 1417: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1418: 	    $gradestatus='';
                   1419: 	}
1.311     foxr     1420: 	$result.=$gradestatus;
1.265     sakharuk 1421: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1422:     } elsif ($target eq 'edit') {
1.311     foxr     1423: 	$result.=&Apache::edit::end_table();
1.322     albertel 1424:     } elsif ($target eq 'modified') {
                   1425: 	 $result .= $token->[2];
                   1426: 	 $result.=&Apache::edit::handle_insertafter($token->[1]);
1.159     albertel 1427:     }
                   1428:     pop @Apache::inputtags::status;
                   1429:     $Apache::inputtags::part='';
1.295     albertel 1430:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1431:     return $result;
1.11      albertel 1432: }
1.1       albertel 1433: 
1.25      albertel 1434: sub start_preduedate {
1.326     albertel 1435:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339   ! albertel 1436:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
        !          1437: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1438: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1439: 	if (!$Apache::lonhomework::scantronmode &&
                   1440: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1441: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1442: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1443: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1444: 	}
1.24      albertel 1445:     }
1.159     albertel 1446:     return '';
1.24      albertel 1447: }
                   1448: 
1.25      albertel 1449: sub end_preduedate {
1.159     albertel 1450:     return '';
1.24      albertel 1451: }
                   1452: 
1.25      albertel 1453: sub start_postanswerdate {
1.326     albertel 1454:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339   ! albertel 1455:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade') {
1.300     albertel 1456: 	if ($Apache::lonhomework::scantronmode ||
                   1457: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1.326     albertel 1458: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1459: 	}
                   1460:     } elsif ($target eq 'tex') {
1.326     albertel 1461: 	&Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1462:     }
                   1463:     return '';
1.24      albertel 1464: }
                   1465: 
1.25      albertel 1466: sub end_postanswerdate {
1.159     albertel 1467:     return '';
1.24      albertel 1468: }
                   1469: 
1.25      albertel 1470: sub start_notsolved {
1.326     albertel 1471:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1472:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339   ! albertel 1473: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1474: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1475: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1476: 	if ($gradestatus =~ /^correct/ &&
                   1477: 	    &Apache::response::show_answer()) {
1.159     albertel 1478: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1479: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1480: 	}
1.24      albertel 1481:     }
1.159     albertel 1482:     return '';
1.24      albertel 1483: }
                   1484: 
1.25      albertel 1485: sub end_notsolved {
1.159     albertel 1486:     return '';
1.24      albertel 1487: }
                   1488: 
                   1489: sub start_solved {
1.326     albertel 1490:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1491:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1492: 	$target eq 'tex') {
                   1493: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1494: 	if ($gradestatus !~ /^correct/ ||
                   1495: 	    !&Apache::response::show_answer()) {
1.326     albertel 1496: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1497: 	}
1.24      albertel 1498:     }
1.159     albertel 1499:     return '';
1.24      albertel 1500: }
                   1501: 
                   1502: sub end_solved {
1.248     albertel 1503:     return '';
                   1504: }
                   1505: 
                   1506: sub start_problemtype {
1.326     albertel 1507:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1508:     my $result;
1.339   ! albertel 1509:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
        !          1510: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1511: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1512: 	if (!defined($mode)) { $mode='show'; }
                   1513: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1514: 	my $found=0;
                   1515: 	foreach my $type (split(',',$for)) {
                   1516: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1517: 	}
                   1518: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1519: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1520: 	}
                   1521: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1522: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1523: 	}
                   1524:     } elsif ($target eq 'edit') {
                   1525: 	$result .=&Apache::edit::tag_start($target,$token);
                   1526: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1527: 					   [['show','Show'],
                   1528: 					    ['hide','Hide']]
                   1529: 					   ,$token);
                   1530: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1531: 					     [ ['exam','Exam/Quiz Problem'],
                   1532: 					       ['survey','Survey'],
                   1533: 					       ['problem','Homework Problem'] ]
                   1534: 					     ,$token);
                   1535: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1536:     } elsif ($target eq 'modified') {
                   1537: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1538: 						     $safeeval,'mode','for');
                   1539: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1540:     }
                   1541:     return $result;
                   1542: }
                   1543: 
                   1544: sub end_problemtype {
1.159     albertel 1545:     return '';
1.24      albertel 1546: }
1.34      albertel 1547: 
                   1548: sub start_startouttext {
1.159     albertel 1549:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1550:     my @result=(''.'');
                   1551:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1552:     return (@result);
1.34      albertel 1553: }
1.159     albertel 1554: 
1.34      albertel 1555: sub end_startouttext {
1.326     albertel 1556:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1557:     my $result='';
                   1558:     my $text='';
                   1559: 
                   1560:     if ($target eq 'edit') {
1.326     albertel 1561: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.211     albertel 1562: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1563: <td>".&mt('Delete:').
1.159     albertel 1564:                  &Apache::edit::deletelist($target,$token)
                   1565: 		 ."</td>
1.42      albertel 1566: <td>".
1.159     albertel 1567:                  &Apache::edit::insertlist($target,$token).
                   1568: 		 &Apache::edit::end_row().
                   1569:                  &Apache::edit::start_spanning_row()."\n"
1.188     bowersj2 1570: 		 . &Apache::loncommon::helpLatexCheatsheet () .
1.255     www      1571: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1572:     }
                   1573:     if ($target eq 'modified') {
1.219     albertel 1574: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1575:     }
                   1576:     if ($target eq 'tex') {
                   1577: 	$result .= '\noindent ';
                   1578:     }
                   1579:     return $result;
1.34      albertel 1580: }
1.159     albertel 1581: 
1.34      albertel 1582: sub start_endouttext {
1.159     albertel 1583:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1584:     my $result='';
                   1585:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1586:     if ($target eq "modified") {
                   1587: 	$result='<endouttext />'.
                   1588: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1589:     return $result;
1.34      albertel 1590: }
1.159     albertel 1591: 
1.34      albertel 1592: sub end_endouttext {
1.159     albertel 1593:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1594:     my @result=('','');
                   1595:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1596:     return (@result);
1.34      albertel 1597: }
1.159     albertel 1598: 
1.45      albertel 1599: sub delete_startouttext {
1.326     albertel 1600:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1601:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 1602:     my $text=$$parser['-1']->get_text("/endouttext");
                   1603:     my $ntoken=$$parser['-1']->get_token();
                   1604:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1605:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1606:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1607:     # they did the last time round
                   1608:     &Apache::lonxml::increasedepth($ntoken);
                   1609:     &Apache::lonxml::decreasedepth($ntoken);
                   1610:     return 1;
1.193     www      1611: }
                   1612: 
                   1613: sub start_simpleeditbutton {
                   1614:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1615:     my $result='';
1.284     albertel 1616:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 1617: 	($target eq 'web') &&
1.330     albertel 1618:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 1619:         my $url=$env{'request.noversionuri'};
1.193     www      1620:         $url=~s/\?.*$//;
1.278     albertel 1621: 	my ($symb) = &Apache::lonxml::whichuser();
1.194     www      1622: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.278     albertel 1623:                 '<a href="'.$url.'/smpedit?symb='.&Apache::lonnet::escape($symb).'">'.&mt('Edit').'</a> - '.&mt('Note: it can take up to 10 minutes for changes to take effect for all users.').
1.196     www      1624: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1625:     }
                   1626:     return $result;
                   1627: }
                   1628: 
                   1629: sub end_simpleeditbutton {
                   1630:     return '';
1.45      albertel 1631: }
1.34      albertel 1632: 
1.1       albertel 1633: 1;
                   1634: __END__

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