Annotation of loncom/homework/structuretags.pm, revision 1.351

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.351   ! albertel    4: # $Id: structuretags.pm,v 1.350 2006/04/20 03:28:52 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 $result;;
1.10      albertel   66: }
                     67: 
                     68: sub end_tex {
1.44      ng         69:     return '';
1.9       albertel   70: }
                     71: 
1.48      albertel   72: sub page_start {
1.345     albertel   73:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
                     74: 	$extra_head)=@_;
1.159     albertel   75:     my %found;
1.207     albertel   76:     foreach my $taginside (@$tagstack) {
1.159     albertel   77: 	foreach my $taglookedfor ('html','body','form') {
                     78: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                     79: 	}
                     80:     }
                     81: 
1.343     albertel   82:     if ($target eq 'tex') {
                     83: 	return
                     84: 	    &Apache::londefdef::start_html($target,$token,$tagstack,
                     85: 					   $parstack,$parser,$safeeval);
                     86:     }
                     87: 
1.344     albertel   88:     my %body_args;
                     89:     if (defined($found{'html'})) {
                     90: 	$body_args{'skip_phases'}{'head'}=1;
                     91:     } else {
1.343     albertel   92: 	
1.345     albertel   93: 	$extra_head .= &Apache::lonhtmlcommon::spellheader();
1.343     albertel   94: 
1.336     albertel   95: 	my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
1.335     albertel   96: 	if ($css_href =~ /\S/) {
                     97: 	    &Apache::lonxml::extlink($css_href);
1.343     albertel   98: 	    $extra_head .= 
1.335     albertel   99: 		'<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
                    100: 	}
1.327     albertel  101: 	if ($target eq 'edit') {
1.343     albertel  102: 	    $extra_head.=&Apache::edit::js_change_detection().
                    103: 		"<script type=\"text/javascript\">\n".
                    104: 		"if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
                    105: 		&Apache::loncommon::browser_and_searcher_javascript().
                    106:                 "\n</script>\n";
                    107: 	}
1.159     albertel  108:     }
1.343     albertel  109: 
1.344     albertel  110:     if (defined($found{'body'})) {
                    111: 	$body_args{'skip_phases'}{'body'}=1;
                    112:     } elsif (!defined($found{'body'}) 
                    113: 	     && $env{'request.state'} eq 'construct') {
1.343     albertel  114: 	if ($target eq 'web' || $target eq 'edit') {
1.344     albertel  115: 	    # no extra args to bodytag
1.297     albertel  116: 	}
1.272     albertel  117:     } elsif (!defined($found{'body'})) {
1.343     albertel  118: 	my %add_entries;
1.159     albertel  119: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    120: 						  $safeeval);
1.343     albertel  121: 	if ($background ne '' ) {
                    122: 	    $add_entries{'background'} = $background;
                    123: 	}
1.344     albertel  124: 
1.290     albertel  125: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    126: 					       $safeeval);
1.344     albertel  127:        	if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
                    128: 
                    129: 	$body_args{'bgcolor'}        = $bgcolor;
                    130: 	$body_args{'no_title'}       = 1;
                    131: 	$body_args{'force_register'} = 1;
                    132: 	$body_args{'add_entries'}    = \%add_entries;	
                    133:     }
                    134: 
                    135:     my $page_start = &Apache::loncommon::start_page($name,$extra_head,
                    136: 						    \%body_args);
                    137: 
                    138:     if (!defined($found{'body'}) 
                    139: 	&& $env{'request.state'} ne 'construct'
                    140: 	&& ($target eq 'web' || $target eq 'webgrade')) {
                    141: 
                    142: 	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonxml::whichuser();
                    143: 	if ($symb eq '' && !$publicuser) {
                    144: 	    my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
                    145: 	    $help=&mt("Browsing resource, all submissions are temporary.")."<br />";
                    146: 	    $page_start .= $help;
1.159     albertel  147: 	}
1.344     albertel  148:     }
                    149: 
                    150:     if (!defined($found{'body'})) {
1.343     albertel  151: 	$page_start .= &Apache::lonxml::message_location();
1.159     albertel  152:     }
1.344     albertel  153:     
1.159     albertel  154:     my $form_tag_start;
                    155:     if (!defined($found{'form'})) {
1.337     albertel  156: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
1.338     albertel  157: 	my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.327     albertel  158: 	$form_tag_start.=$uri.'" ';
                    159: 	if ($target eq 'edit') {
                    160: 	    $form_tag_start.=&Apache::edit::form_change_detection();
                    161: 	}
                    162: 	$form_tag_start.='>';
1.159     albertel  163:     }
1.343     albertel  164:     return ($page_start,$form_tag_start);
1.105     albertel  165: }
                    166: 
1.141     matthew   167: #use Time::HiRes();
1.105     albertel  168: sub get_resource_name {
1.159     albertel  169:     my ($parstack,$safeeval)=@_;
1.204     albertel  170:     if (defined($Apache::lonhomework::name)) {
                    171: 	return $Apache::lonhomework::name;
                    172:     }
1.279     albertel  173:     my ($symb)=&Apache::lonxml::whichuser();
                    174:     my $name=&Apache::lonnet::gettitle($symb);
1.159     albertel  175:     if ($name eq '') {
                    176: 	$name=&Apache::lonnet::EXT('resource.title');
                    177: 	if ($name eq 'con_lost') { $name = ''; }
                    178:     }
1.204     albertel  179:     if ($name!~/\S+/) {
1.284     albertel  180: 	$name=$env{'request.uri'};
1.205     albertel  181: 	$name=~s-.*/([^/]+)$-$1-;
1.204     albertel  182:     }
1.159     albertel  183:     $Apache::lonhomework::name=$name;
                    184:     return $name;
1.105     albertel  185: }
                    186: 
                    187: sub setup_rndseed {
1.159     albertel  188:     my ($safeeval)=@_;
                    189:     my $rndseed;
1.162     albertel  190:     my ($symb)=&Apache::lonxml::whichuser();
1.333     albertel  191:     if ($env{'request.state'} eq "construct" 
                    192: 	|| $symb eq '' 
                    193: 	|| $Apache::lonhomework::type eq 'practice'
                    194: 	|| $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       195: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  196: 						['rndseed']);
1.284     albertel  197: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  198: 	if (!$rndseed) {
1.162     albertel  199: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    200: 	    if (!$rndseed) {
                    201: 		$rndseed=time;
                    202: 	    }
1.284     albertel  203: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  204: 	}
1.284     albertel  205: 	if ($env{'form.resetdata'} eq &mt('New Problem Variation') ||
                    206: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  207: 	    srand(time);
                    208: 	    $rndseed=int(rand(2100000000));
1.284     albertel  209: 	    $env{'form.rndseed'}=$rndseed;
                    210: 	    delete($env{'form.resetdata'});
                    211: 	    delete($env{'form.newrandomization'});
1.159     albertel  212: 	}
1.187     albertel  213: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
1.307     albertel  214: 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
1.187     albertel  215:         }
1.247     albertel  216:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    217: 	   $rndseed=&Apache::lonnet::rndseed();
                    218: 	}
1.221     albertel  219: 	if ($safeeval) {
                    220: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  221: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  222: 	}
1.159     albertel  223:     }
                    224:     return $rndseed;
1.105     albertel  225: }
                    226: 
1.268     albertel  227: sub remember_problem_state {
                    228:     return '
1.284     albertel  229:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    230:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    231:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  232: }
                    233: 
1.105     albertel  234: sub problem_edit_header {
1.268     albertel  235:     return '<input type="hidden" name="submitted" value="edit" />'.
                    236: 	&Apache::structuretags::remember_problem_state().'
1.210     albertel  237:        <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
1.243     matthew   238:        <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
1.328     albertel  239:        <input '.&Apache::edit::submit_ask_anyway().' type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
1.243     matthew   240:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> <hr />
                    241:        <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes and Edit').'" />
                    242:        <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
1.260     albertel  243:        &Apache::loncommon::help_open_menu('','Problem Editing Help','Problem_Editor_XML_Index','',5,'Authoring',undef,undef,undef,'Problem Editing Help')
                    244:        .'</td></tr></table>'.
1.282     albertel  245:        '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  246: }
                    247: 
                    248: sub problem_edit_footer {
1.210     albertel  249:     return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
1.255     www       250:     <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />'.
1.348     albertel  251:     &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields()).
1.342     albertel  252:     "\n</form>\n".&Apache::loncommon::end_page();
1.105     albertel  253: }
                    254: 
1.235     albertel  255: sub option {
                    256:     my ($value,$name) = @_;
                    257:     my $result ="<option value='".$value."' ";
1.284     albertel  258:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  259: 	$result.=" selected='on' ";
                    260:     }
                    261:     $result.='>';
                    262:     return $result;
                    263: }
                    264: 
1.105     albertel  265: sub problem_web_to_edit_header {
1.159     albertel  266:     my ($rndseed)=@_;
1.313     albertel  267:     my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />';
                    268:     if (!$Apache::lonhomework::parsing_a_task) {
                    269: 	$result .= '<input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />';
                    270:     }
                    271:     $result .= '<input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
1.243     matthew   272:              <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    273:              <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
1.210     albertel  274:              <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
1.270     albertel  275:               <input type="text" name="rndseed" size="10" value="'.
1.175     albertel  276: 	       $rndseed.'"
1.270     albertel  277:            onchange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
1.281     albertel  278:              <label><input type="checkbox" name="showallfoils" ';
1.315     albertel  279:     my $show_all_foils_text = 
                    280: 	($Apache::lonhomework::parsing_a_task) ?
                    281: 	&mt('&nbsp;Show&nbsp;All&nbsp;Instances')
                    282: 	: &mt('&nbsp;Show&nbsp;All&nbsp;Foils');
                    283: 
1.284     albertel  284:     if (defined($env{'form.showallfoils'})) { $result.='checked="on"'; }
1.315     albertel  285:     $result.= ' />'.$show_all_foils_text.
1.228     www       286: 	&Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
1.281     albertel  287: 	'</label><hr />';
1.313     albertel  288:     if (!$Apache::lonhomework::parsing_a_task) {
                    289: 	$result.="
1.235     albertel  290: <nobr>
                    291: Problem Status:
                    292: <select name='problemstate'>
1.270     albertel  293:   <option value=''></option>
1.235     albertel  294:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    295:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    296:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    297:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    298:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    299: </select>
                    300: </nobr>
                    301: <nobr>
                    302: Problem Type:
                    303: <select name='problemtype'>
1.270     albertel  304:   <option value=''></option>
1.242     albertel  305:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
                    306:   ".&option('problem','problemtype').&mt("Homework problem")."</option>
                    307:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.235     albertel  308: </select>
                    309: </nobr>
                    310: <nobr>
                    311: Feedback Mode:
                    312: <select name='problemstatus'>
                    313:   <option value=''></option>
1.242     albertel  314:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
                    315:   ".&option('no', 'problemstatus').&mt("Don't Show Feedback")."</option>
1.235     albertel  316: </select>
                    317: </nobr>
1.242     albertel  318: <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
1.235     albertel  319: <hr />";
1.313     albertel  320: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    321: 	if (!$numtoanalyze) { $numtoanalyze=20; }
                    322: 	$result.= '<input type="submit" name="problemmode" value='.
                    323: 	    &mt('"Calculate answers').'" /> for
1.136     albertel  324:              <input type="text" name="numtoanalyze" value="'.
1.210     albertel  325: 	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
                    326: 	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
1.176     albertel  327: 						     '',undef,undef,300).
1.210     albertel  328: 						     '<hr />';
1.313     albertel  329:     }
1.159     albertel  330:     return $result;
1.48      albertel  331: }
                    332: 
1.65      albertel  333: sub initialize_storage {
1.159     albertel  334:     %Apache::lonhomework::results=();
1.162     albertel  335:     %Apache::lonhomework::history=();
1.159     albertel  336:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.333     albertel  337:     if ($env{'request.state'} eq 'construct' 
                    338: 	|| $symb eq ''
                    339: 	|| $Apache::lonhomework::type eq 'practice') {
                    340: 	
                    341: 	my $namespace = $symb || $env{'request.uri'};
                    342: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
                    343: 	    $env{'form.resetdata'} eq &mt('New Problem Variation') ||
                    344: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    345: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    346: 	    &Apache::lonxml::debug("Attempt reset");
                    347: 	}
1.159     albertel  348: 	%Apache::lonhomework::history=
1.333     albertel  349: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  350: 	my ($temp)=keys %Apache::lonhomework::history ;
                    351: 	&Apache::lonxml::debug("Return message of $temp");
                    352:     } else {
                    353: 	%Apache::lonhomework::history=
                    354: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    355:     }
                    356:     #ignore error conditions
1.67      albertel  357:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  358:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  359: }
                    360: 
                    361: # -------------------------------------------------------------finalize_storage
                    362: # Stores away the result has to a student's environment
                    363: # checks form.grade_ for specific values, other wises stores
                    364: # to the running users environment
1.285     raeburn   365: # Will increment totals for attempts, students, and corrects
                    366: # if running user has student role.  
1.65      albertel  367: sub finalize_storage {
1.159     albertel  368:     my $result;
1.289     albertel  369:     if (%Apache::lonhomework::results) {
1.323     albertel  370: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    371: 	delete(@Apache::lonhomework::results{@remove});
1.159     albertel  372: 	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.333     albertel  373: 	if ($env{'request.state'} eq 'construct' 
                    374: 	    || $symb eq ''
                    375: 	    || $Apache::lonhomework::type eq 'practice') {
                    376: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  377: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  378: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  379: 					      $namespace,'',$domain,$name);
1.159     albertel  380: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    381: 	} else {
                    382: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    383: 					    $symb,$courseid,$domain,$name);
                    384: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   385:             if ($env{'request.role'} =~/^st/) {
                    386:                 &store_aggregates($symb,$courseid);
                    387:             }
1.159     albertel  388: 	}
1.323     albertel  389:     } else {
                    390: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  391:     }
1.159     albertel  392:     return $result;
1.65      albertel  393: }
1.289     albertel  394: use Data::Dumper;
1.65      albertel  395: 
1.285     raeburn   396: # -------------------------------------------------------------store_aggregates
                    397: # Sends hash of values to be incremented in nohist_resourcetracker.db
                    398: # for the course. Increments total number of attempts, unique students 
                    399: # and corrects for each part for an instance of a problem, as appropriate.
                    400: sub store_aggregates {
                    401:     my ($symb,$courseid) = @_;
1.286     albertel  402:     my %aggregate;
                    403:     my @parts;
1.288     albertel  404:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    405:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  406:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  407:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  408:             push(@parts, $1);
1.285     raeburn   409:         }
                    410:     }
1.286     albertel  411:     foreach my $part (@parts) {
                    412:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    413: 	    eq 'APPROX_ANS' ||
                    414: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    415: 	    eq 'EXACT_ANS') {
1.287     albertel  416:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   417:         }
1.286     albertel  418:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  419:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   420:         } else {
1.293     albertel  421:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   422:             if ($last_reset) {
1.293     albertel  423:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   424:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    425:                 }
                    426:             }
1.285     raeburn   427:         }
1.287     albertel  428:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   429:     }
1.292     raeburn   430:     if (keys (%aggregate) > 0) {
1.289     albertel  431: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   432:                             $cdomain,$cname);
                    433:     }
                    434: }
1.289     albertel  435: 
1.65      albertel  436: sub checkout_msg {
1.211     albertel  437:     my %lt=&Apache::lonlocal::texthash( 
                    438: 		'resource'=>'The resource needs to be checked out',
                    439: 		'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.',
                    440:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    441:                 'checkout'=>'Check out Exam for Viewing',
                    442: 		'checkout?'=>'Check out Exam?');
1.159     albertel  443:     return (<<ENDCHECKOUT);
1.211     albertel  444: <h2>$lt{'resource'}</h2>
                    445:     <p>$lt{'id_expln'}</p>
                    446: <font color="red">
                    447: <p>$lt{'warning'}</p>
1.91      albertel  448: </font>
1.284     albertel  449: <form name="checkout" method="POST" action="$env{'request.uri'}">
1.91      albertel  450: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  451: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  452: </form>
                    453: ENDCHECKOUT
                    454: }
                    455: 
1.252     albertel  456: sub firstaccess_msg {
1.253     albertel  457:     my ($time,$symb)=@_;
                    458:     my ($map)=&Apache::lonnet::decode_symb($symb);
                    459:     my $foldertitle=&Apache::lonnet::gettitle($map);
                    460:     &Apache::lonxml::debug("map is $map title is $foldertitle");
1.252     albertel  461:     return (<<ENDCHECKOUT);
1.253     albertel  462: <h2>The resources in "$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  463: <form name="markaccess" method="POST" action="$env{'request.uri'}">
1.252     albertel  464: <input type="hidden" name="markaccess" value="yes" />
                    465: <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
                    466: </form>
                    467: ENDCHECKOUT
                    468: }
                    469: 
1.204     albertel  470: sub init_problem_globals {
                    471:     my ($type)=@_;
                    472:     #initialize globals
1.308     foxr      473:     #   For problems, we start out in part 0 (outside a <part> tag).
                    474:     #   and part 0 is used to describe the main body of the <problem>
                    475:     #
1.204     albertel  476:     if ($type eq 'problem') {
                    477: 	$Apache::inputtags::part='0';
                    478: 	@Apache::inputtags::partlist=('0');
1.266     albertel  479: 	$Apache::lonhomework::problemstatus=&get_problem_status('0');
                    480: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      481: 
1.266     albertel  482:     } elsif ($type eq 'library') {
1.204     albertel  483: 	$Apache::inputtags::part='';
                    484: 	@Apache::inputtags::partlist=();
                    485: 	$Apache::lonhomework::problemstatus='';	
1.266     albertel  486: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      487: 
1.304     albertel  488:     } elsif ($type eq 'Task') {
                    489: 	$Apache::inputtags::part='0';
                    490: 	@Apache::inputtags::partlist=('0');
                    491: 	$Apache::lonhomework::problemstatus='';	
                    492: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  493:     }
                    494:     @Apache::inputtags::responselist = ();
                    495:     @Apache::inputtags::importlist = ();
                    496:     @Apache::inputtags::previous=();
                    497:     @Apache::inputtags::previous_version=();
                    498:     $Apache::structuretags::printanswer='No';
                    499:     @Apache::structuretags::whileconds=();
                    500:     @Apache::structuretags::whilebody=();
                    501:     @Apache::structuretags::whileline=();
                    502:     $Apache::lonhomework::scantronmode=0;
                    503:     undef($Apache::lonhomework::name);
                    504: 
                    505: }
                    506: 
                    507: sub reset_problem_globals {
                    508:     my ($type)=@_;
                    509:     undef(%Apache::lonhomework::history);
                    510:     undef(%Apache::lonhomework::results);
                    511:     undef($Apache::inputtags::part);
1.208     albertel  512: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    513: #detect if we try to do 2 problems in one file
                    514: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  515:     undef($Apache::lonhomework::name);
                    516: }
                    517: 
1.241     albertel  518: sub set_problem_state {
1.240     albertel  519:     my ($part)=@_;
1.284     albertel  520:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  521: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    522: 	    'correct_by_student';
                    523:     }
                    524: }
                    525: 
1.241     albertel  526: sub get_problem_status {
                    527:     my ($part)=@_;
1.267     albertel  528:     my $problem_status;
1.284     albertel  529:     if ($env{'request.state'} eq 'construct' &&
                    530: 	defined($env{'form.problemstatus'})) {
                    531: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  532:     } else {
                    533: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    534: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  535: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  536:     }
                    537:     return $problem_status;
                    538: }
                    539: 
1.9       albertel  540: sub start_problem {
1.326     albertel  541:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel  542: 
1.311     foxr      543:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  544:     if (!$Apache::lonxml::metamode) {
                    545: 	&Apache::lonxml::startredirection();
                    546:     }
1.311     foxr      547: 
1.308     foxr      548:     # Problems don't nest and we don't allow more than one <problem> in
                    549:     # a .problem file.
                    550:     #
1.184     albertel  551:     if ( $Apache::inputtags::part ne '' ||
                    552: 	 $Apache::lonhomework::parsing_a_problem) {
                    553: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel  554: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel  555: 	return '';
                    556:     }
1.184     albertel  557: 
                    558:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  559:     &init_problem_globals('problem');
1.166     albertel  560: 
1.284     albertel  561:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  562: 	$Apache::lonhomework::scantronmode=1;
                    563:     }
1.161     albertel  564: 
1.246     albertel  565:     &initialize_storage();
1.159     albertel  566:     if ($target ne 'analyze') {
                    567: 	if ($target eq 'web') {
                    568: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
1.238     albertel  569: 	}
1.284     albertel  570:        	if ($env{'request.state'} eq 'construct') { &set_problem_state('0'); }
1.159     albertel  571: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.284     albertel  572: 	if (($env{'request.state'} eq 'construct') &&
                    573: 	    defined($env{'form.problemtype'})) {
                    574: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  575: 	}
1.332     albertel  576: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  577:     }
1.164     albertel  578:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  579: 	my $uri=$env{'request.uri'};
1.159     albertel  580: 	if ($uri=~/\.(\w+)$/) {
                    581: 	    $Apache::lonhomework::type=$1;
                    582: 	    &Apache::lonxml::debug("Using type of $1");
                    583: 	} else {
                    584: 	    $Apache::lonhomework::type='problem';
                    585: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    586: 	}
1.87      albertel  587:     }
1.301     albertel  588:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       589: 
1.159     albertel  590:     #added vars to the scripting enviroment
1.213     albertel  591:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  592:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  593:     &Apache::run::run($expression,$safeeval);
1.159     albertel  594:     my $status;
                    595:     my $accessmsg;
                    596: 
1.343     albertel  597:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel  598:     my ($result,$form_tag_start);
                    599:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex') {
                    600: 	($result,$form_tag_start) =
                    601: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    602: 			$name);
                    603:     }
                    604: 
1.284     albertel  605:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  606: 
                    607:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    608:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    609: 	$target eq 'tex') {
                    610: 	#handle exam checkout
                    611: 	if ($Apache::lonhomework::type eq 'exam') {
                    612: 	    my $token=
                    613: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  614: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  615: 		$token=&Apache::lonxml::maketoken();
                    616: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    617: 		    $token;
                    618: 	    }
1.343     albertel  619: 	    $result.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  620: 	}
1.284     albertel  621: 	if ($env{'form.markaccess'}) {
1.252     albertel  622: 	    &Apache::lonnet::set_first_access('map');
                    623: 	}
1.159     albertel  624: 	#handle rand seed in construction space
                    625: 	my $rndseed=&setup_rndseed($safeeval);
1.162     albertel  626: 	my ($symb)=&Apache::lonxml::whichuser();
1.333     albertel  627: 	if ($env{'request.state'} ne "construct" && 
                    628: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  629: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    630: 		$rndseed.'" />'.
                    631: 		    '<input type="submit" name="resetdata"
1.334     albertel  632:                              value="'.&mt('New Problem Variation').'" />';
                    633: 	    if (exists($env{'form.username'})) {
                    634: 		$form_tag_start.=
1.164     albertel  635: 		    '<input type="hidden" name="username"
1.284     albertel  636:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  637: 	    }
1.333     albertel  638: 	    if ($env{'request.role.adv'}) {
1.267     albertel  639: 		$form_tag_start.=
1.300     albertel  640: 		    ' <label><input type="checkbox" name="showallfoils" ';
1.284     albertel  641: 		if (defined($env{'form.showallfoils'})) {
1.267     albertel  642: 		    $form_tag_start.='checked="on"';
                    643: 		}
1.300     albertel  644: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    645: 		    '</label>';
1.267     albertel  646: 	    }
                    647: 	    $form_tag_start.='<hr />';
1.162     albertel  648: 	}
1.324     albertel  649: 
                    650: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    651: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  652: 	push (@Apache::inputtags::status,$status);
1.324     albertel  653: 
1.159     albertel  654: 	my $expression='$external::datestatus="'.$status.'";';
                    655: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    656: 	&Apache::run::run($expression,$safeeval);
                    657: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  658: 
1.159     albertel  659: 	if (( $status eq 'CLOSED' ) ||
                    660: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  661: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  662: 	    ( $status eq 'BANNED') ||
1.216     albertel  663: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  664: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  665: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  666: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    667: 						       $style);
1.159     albertel  668: 	    if ( $target eq "web" ) {
1.343     albertel  669: 		my $msg;
1.159     albertel  670: 		if ($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') {
1.343     albertel  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: 		$result .= &Apache::bridgetask::proctor_validation_screen();
                    701: 	    } elsif ($target eq 'grade') {
                    702: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                    703: 							'problem');
                    704: 	    }
1.159     albertel  705: 	} elsif ($target eq 'web') {
1.343     albertel  706: 	    $result.="\n $form_tag_start".	
1.227     albertel  707: 	      '<input type="hidden" name="submitted" value="yes" />';
                    708: 	    # create a page header and exit
1.284     albertel  709: 	    if ($env{'request.state'} eq "construct") {
                    710: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.227     albertel  711: 	    }
                    712: 	    # if we are viewing someone else preserve that info
1.284     albertel  713: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel  714: 		foreach my $field ('symb','courseid','domain','username') {
                    715: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel  716: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel  717: 		}
                    718: 	    }
                    719: 	} elsif ($target eq 'tex') {
1.319     foxr      720: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                    721: 
1.99      sakharuk  722: 	}
1.159     albertel  723:     } elsif ($target eq 'edit') {
1.343     albertel  724: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel  725: 	$Apache::lonxml::warnings_error_header=
                    726: 	    &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  727: 	my $temp=&Apache::edit::insertlist($target,$token);
                    728: 	$result.=$temp;
                    729:     } elsif ($target eq 'modified') {
                    730: 	$result=$token->[4];
                    731: 	$result.=&Apache::edit::handle_insert();
                    732:     } else {
                    733: 	# page_start returned a starting result, delete it if we don't need it
                    734: 	$result = '';
1.99      sakharuk  735:     }
1.159     albertel  736:     return $result;
1.9       albertel  737: }
                    738: 
                    739: sub end_problem {
1.159     albertel  740:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel  741:     my $result;
1.310     foxr      742: 
1.321     albertel  743:     if (!$Apache::lonxml::metamode) {
                    744: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel  745: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel  746:     }
1.319     foxr      747: 
                    748:     if ($target eq 'tex') {
1.321     albertel  749: 
                    750: 	# Figure out the front matter and replace the
                    751: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                    752: 	# this in end_problem because whether or not we display due
                    753: 	# dates depends on whether due dates have already been
                    754: 	# displayed in the problem parts.
                    755: 
1.319     foxr      756: 	my $frontmatter   = '';
                    757: 	my $startminipage = '';
                    758: 	if (not $env{'form.problem_split'}=~/yes/) {
                    759: 	    $startminipage = '\begin{minipage}{\textwidth}';
                    760: 	}
                    761: 	my $id = $Apache::inputtags::part;
                    762: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                    763: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                    764: 	my @packages = split /,/,$packages;
                    765: 	my $allow_print_points = 0;
                    766: 	foreach my $partial_key (@packages) {
                    767: 	    if ($partial_key=~m/^part_0$/) {
                    768: 		$allow_print_points=1;
                    769: 	    }
                    770: 	}
                    771: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    772: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                    773: 	if (lc($env{'course.'.$env{'request.course.id'}.
                    774: 			'.disableexampointprint'}) eq 'yes') {
                    775: 	    $allow_print_points=0;
                    776: 	}
                    777: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
                    778: 	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 ';
                    779: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                    780: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                    781: 	
                    782: 	#  Figure out what the due date is and if we need to print
                    783: 	#  it in the problem header.  We have been logging the
                    784: 	#  last due date written to file. 
                    785: 	
                    786: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    787: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
                    788: 	my $temp_file;
                    789: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                    790: 	
                    791: 	# Figure out what the last printed due date is or set it
                    792: 	# to the epoch if no duedates have been printed.
                    793: 	
                    794: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                    795: 	if (-e $filename) {
                    796: 	    $temp_file = Apache::File->new($filename);
                    797: 	    my @due_file      = <$temp_file>;
                    798: 	    $due_file_content = $due_file[$#due_file];
                    799: 	    chomp $due_file_content;
                    800: 	} 
                    801: 	
                    802: 	# We display the due date iff it is not the same as the last
                    803: 	# duedate in problem header ($due_file_content), and
                    804: 	# none of our parts displayed a duedate.
                    805: 	#
                    806: 	my $parts_with_displayduedate;
                    807: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                    808: 	    $parts_with_displayduedate = 
                    809: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                    810: 	} else {
                    811: 	    $parts_with_displayduedate = 0;
                    812: 	}
                    813: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                    814: 	    $temp_file = Apache::File->new('>'.$filename);
                    815: 	    print $temp_file "$duetime\n";
                    816: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    817: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                    818: 		    $frontmatter .= $begin_doc.
                    819: 			'\textit{Due date: '.$duedate.'} '.$toc_line;
                    820: 		} else {
                    821: 		    $frontmatter.= $begin_doc.$toc_line;
                    822: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    823: 		}
                    824: 	    } else {
                    825: 		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
                    826: 	    }
                    827: 	} else {
                    828: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    829: 		$frontmatter .= $begin_doc.$toc_line;
                    830: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    831: 	    } else {
                    832: 		$frontmatter .= '\vskip 1mm \\\\\\\\';
                    833: 	    }
                    834: 	}
                    835: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                    836:     }
                    837: 
1.159     albertel  838:     my $status=$Apache::inputtags::status['-1'];
                    839:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    840: 	$target eq 'tex') {
1.249     albertel  841: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel  842: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel  843: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                    844: 		&Apache::inputtags::grade;
1.324     albertel  845: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                    846: 		# no need to grade, and don't want to hide data
1.249     albertel  847: 	    } else {
                    848: 		# move any submission data to .hidden
                    849: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                    850: 	    }
1.159     albertel  851: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    852: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel  853: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel  854: 	    # if part is zero, no <part>s existed, so we need show the current
                    855: 	    # grading status
                    856: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    857: 	    $result.= $gradestatus;
                    858: 	}
                    859: 	if (
1.284     albertel  860: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel  861: 	    ($target eq 'answer') || ($target eq 'tex')
                    862: 	   ) {
1.227     albertel  863: 	    if ($target ne 'tex' &&
1.284     albertel  864: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www       865: 		$result.="</form>";
1.348     albertel  866: 		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
1.159     albertel  867: 	    }
                    868: 	    if ($target eq 'web') {
1.346     albertel  869: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel  870: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  871: 		my $endminipage = '';
1.284     albertel  872: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk  873: 		    $endminipage = '\end{minipage}';
                    874: 		}
1.284     albertel  875:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk  876: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel  877: 		} else {
1.262     sakharuk  878: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel  879: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk  880: 			$result .= $endminipage.'\end{document} ';
                    881: 		    } else {
                    882: 			$result .= '';
                    883: 		    }
1.159     albertel  884: 		}
                    885: 	    }
                    886: 	}
                    887: 	if ($target eq 'grade') {
                    888: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    889: 	    &finalize_storage();
                    890: 	}
1.284     albertel  891: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                    892: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel  893: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel  894: 	                        # normally we get it from above, but in CSTR
1.172     albertel  895: 	                        # we always show answer mode too.
1.159     albertel  896: 	}
                    897:     } elsif ($target eq 'meta') {
                    898: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  899: 	    @Apache::inputtags::response=();
1.159     albertel  900: 	    $result=&Apache::response::mandatory_part_meta;
                    901: 	}
1.215     albertel  902: 	$result.=&Apache::response::meta_part_order();
1.258     albertel  903: 	$result.=&Apache::response::meta_response_order();
1.159     albertel  904:     } elsif ($target eq 'edit') {
                    905: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel  906: 	$result .= &problem_edit_footer();
1.320     albertel  907:     } elsif ($target eq 'modified') {
                    908: 	 $result .= $token->[2];
                    909: 	 $result.=&Apache::edit::handle_insertafter($token->[1]);
1.159     albertel  910:     }
1.155     albertel  911: 
1.284     albertel  912:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel  913: 	&Apache::inputtags::check_for_duplicate_ids();
                    914:     }
1.204     albertel  915: 
                    916:     &reset_problem_globals('problem');
1.159     albertel  917: 
                    918:     return $result;
1.48      albertel  919: }
                    920: 
1.108     albertel  921: 
1.48      albertel  922: sub start_library {
1.159     albertel  923:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel  924:     my ($result,$form_tag_start);
1.244     albertel  925:     if ($$tagstack[0] eq 'library') {
                    926: 	&init_problem_globals('library');
                    927: 	$Apache::lonhomework::type='problem';
                    928:     }
1.159     albertel  929:     if ($target eq 'edit') {
1.343     albertel  930: 	($result,$form_tag_start)=
                    931: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    932: 			'Edit');
                    933: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel  934: 	my $temp=&Apache::edit::insertlist($target,$token);
                    935: 	$result.=$temp;
                    936:     } elsif ($target eq 'modified') {
                    937: 	$result=$token->[4];
                    938: 	$result.=&Apache::edit::handle_insert();
1.340     albertel  939:     } elsif (($target eq 'web' || $target eq 'webgrade')
                    940: 	     && $$tagstack[0] eq 'library' 
                    941: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel  942: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel  943: 	($result,$form_tag_start)=
                    944: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    945: 			$name);
1.159     albertel  946: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel  947: 	$result.=" \n $form_tag_start".	
1.159     albertel  948: 		  '<input type="hidden" name="submitted" value="yes" />';
                    949: 	$result.=&problem_web_to_edit_header($rndseed);
                    950:     }
                    951:     return $result;
1.48      albertel  952: }
                    953: 
                    954: sub end_library {
1.159     albertel  955:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    956:     my $result='';
                    957:     if ($target eq 'edit') {
                    958: 	$result=&problem_edit_footer();
                    959:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel  960: 	     $env{'request.state'} eq "construct") {
1.349     albertel  961: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel  962:     }
1.204     albertel  963:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel  964:     return $result;
1.197     www       965: }
                    966: 
                    967: sub start_definetag {
1.326     albertel  968:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www       969: 
                    970:     my $result;
                    971: 
                    972:     my $name = $token->[2]->{'name'};
1.326     albertel  973:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.197     www       974:     if ($name=~/^\//) {
                    975: 	$result=
                    976:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                    977:     } else {
                    978: 	$result=
                    979:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                    980:     }
                    981:     $skip=~s/\</\&lt\;/gs;
                    982:     $skip=~s/\>/\&gt\;/gs;
                    983:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                    984:     return $result;
                    985: }
                    986: 
                    987: sub end_definetag {
                    988:     return '';
1.1       albertel  989: }
                    990: 
                    991: sub start_block {
1.201     albertel  992:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel  993: 
                    994:     my $result;
1.1       albertel  995: 
1.339     albertel  996:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                    997: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel  998: 	my $code = $token->[2]->{'condition'};
1.201     albertel  999: 	if (defined($code)) {
1.137     albertel 1000: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1001: 		&Apache::lonxml::default_homework_load($safeeval);
                   1002: 	    }
1.131     albertel 1003: 	    $result = &Apache::run::run($code,$safeeval);
                   1004: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1005: 	} else {
                   1006: 	    $result='1';
                   1007: 	}
                   1008: 	if ( ! $result ) {
1.201     albertel 1009: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1010: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1011: 	}
                   1012: 	$result='';
                   1013:     } elsif ($target eq 'edit') {
                   1014: 	$result .=&Apache::edit::tag_start($target,$token);
                   1015: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1016: 					  $token,40);
                   1017: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1018:     } elsif ($target eq 'modified') {
                   1019: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1020: 						     $safeeval,'condition');
                   1021: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1022:     }
1.131     albertel 1023:     return $result;
1.1       albertel 1024: }
                   1025: 
                   1026: sub end_block {
1.167     www      1027:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1028:     my $result;
                   1029:     if ($target eq "edit") {
                   1030: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1031:     }
                   1032:     return $result;
                   1033: }
                   1034: 
                   1035: sub start_languageblock {
1.201     albertel 1036:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1037: 
                   1038:     my $result;
                   1039: 
1.339     albertel 1040:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1041: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1042: 	my $include = $token->[2]->{'include'};
                   1043: 	my $exclude = $token->[2]->{'exclude'};
                   1044:         my %languages=&Apache::loncommon::display_languages();
                   1045:         $result='1';
                   1046: 	if ($include) {
                   1047:             $result='';
                   1048:             foreach (split(/\,/,$include)) {
                   1049:                 if ($languages{$_}) { $result='1'; }
                   1050:             }
                   1051: 	}
                   1052:         if ($exclude) {
                   1053:             foreach (split(/\,/,$exclude)) {
                   1054:                 if ($languages{$_}) { $result='0'; }
                   1055:             }
                   1056: 	}
                   1057: 	if ( ! $result ) {
                   1058: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1059: 						   $style);
                   1060: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1061: 	}
                   1062: 	$result='';
1.167     www      1063:     } elsif ($target eq 'edit') {
                   1064: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1065: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1066: 					  $token,40);
1.211     albertel 1067: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1068: 					  $token,40);
                   1069: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1070:     } elsif ($target eq 'modified') {
                   1071: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1072: 						     $safeeval,'include',
                   1073: 						     'exclude');
1.167     www      1074: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1075:     }
                   1076:     return $result;
                   1077: }
                   1078: 
                   1079: sub end_languageblock {
1.170     www      1080:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1081:     my $result;
1.201     albertel 1082:     if ($target eq "edit") {
1.170     www      1083: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1084:     }
                   1085:     return $result;
                   1086: }
                   1087: 
                   1088: sub start_instructorcomment {
1.201     albertel 1089:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1090: 
                   1091:     my $result;
                   1092: 
1.339     albertel 1093:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1094: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.284     albertel 1095:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1096: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1097: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1098: 						   $parser,$style);
1.170     www      1099: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1100: 	}
                   1101: 	$result='';
                   1102:     } elsif ($target eq 'edit') {
                   1103: 	$result .=&Apache::edit::tag_start($target,$token);
                   1104: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1105:     }
                   1106:     return $result;
                   1107: }
                   1108: 
                   1109: sub end_instructorcomment {
1.159     albertel 1110:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1111:     my $result;
                   1112:     if ($target eq "edit") {
                   1113: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1114:     }
                   1115:     return $result;
1.4       tsai     1116: }
                   1117: 
                   1118: sub start_while {
1.326     albertel 1119:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1120: 
1.160     albertel 1121:     my $result;
1.339     albertel 1122:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1123: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1124: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1125: 
1.160     albertel 1126: 	push( @Apache::structuretags::whileconds, $code);
                   1127: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1128: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1129: 	}
                   1130: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1131: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1132: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1133: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1134: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1135: 	if ( $result ) {
                   1136: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1137: 	}
                   1138:     } elsif ($target eq 'edit') {
                   1139: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1140: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1141: 					  $token,40);
                   1142: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1143:     } elsif ($target eq 'modified') {
                   1144: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1145: 						     $safeeval,'condition');
                   1146: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1147:     }
1.160     albertel 1148:     return $result;
1.4       tsai     1149: }
                   1150: 
                   1151: sub end_while {
1.159     albertel 1152:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1153:     my $result;
                   1154: 
1.339     albertel 1155:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1156: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1157: 	my $code = pop(@Apache::structuretags::whileconds);
                   1158: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1159: 	my $line = pop(@Apache::structuretags::whileline);
                   1160: 	my $return = &Apache::run::run($code,$safeeval);
                   1161: 	my $starttime=time;
                   1162: 	my $error=0;
                   1163: 	while ($return) {
                   1164: 	    if (time-$starttime >
                   1165: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.270     albertel 1166: 		#$return = 0; $error=1; next;
1.161     albertel 1167: 	    }
                   1168: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                   1169: 	    $return = &Apache::run::run($code,$safeeval);
                   1170: 	}
                   1171: 	if ($error) {
1.270     albertel 1172: 	    &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 1173: 	}
                   1174:     } elsif ($target eq "edit") {
                   1175: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1176:     }
1.160     albertel 1177:     return $result;
1.1       albertel 1178: }
1.6       tsai     1179: 
1.160     albertel 1180: # <randomlist show="1">
1.6       tsai     1181: #  <tag1>..</tag1>
                   1182: #  <tag2>..</tag2>
                   1183: #  <tag3>..</tag3>
1.160     albertel 1184: #  ...
1.6       tsai     1185: # </randomlist>
                   1186: sub start_randomlist {
1.326     albertel 1187:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1188:     my $result;
1.339     albertel 1189:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1190: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1191: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1192: 	my $b_parser= HTML::LCParser->new(\$body);
                   1193: 	$b_parser->xml_mode(1);
                   1194: 	$b_parser->marked_sections(1);
1.159     albertel 1195: 	my $b_tok;
                   1196: 	my @randomlist;
                   1197: 	my $list_item;
                   1198: 	while($b_tok = $b_parser->get_token() ) {
                   1199: 	    if($b_tok->[0] eq 'S') { # start tag
                   1200: 		# get content of the tag until matching end tag
                   1201: 		# get all text upto the matching tag
                   1202: 		# and push the content into @randomlist
                   1203: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1204: 							   $b_parser);
                   1205: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1206: 		push(@randomlist,$list_item);
                   1207: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1208:                 #         $list_item</b>";
                   1209: 	    }
                   1210: 	    if($b_tok->[0] eq 'T') { # text
                   1211: 		# what to do with text in between tags?
                   1212: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1213: 	    }
                   1214: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1215: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1216: 	    # }
                   1217: 	}
1.303     albertel 1218: 	if (@randomlist) {
                   1219: 	    my @idx_arr = (0 .. $#randomlist);
                   1220: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1221: 	    my $bodytext = '';
                   1222: 	    my $show=$#randomlist;
                   1223: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1224: 	    $showarg--;
                   1225: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                   1226: 	    for(0 .. $show) {
                   1227: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1228: 	    }
                   1229: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1230: 	}
                   1231:     } elsif ($target eq 'edit' ) {
                   1232: 	$result .=&Apache::edit::tag_start($target,$token);
                   1233: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1234: 					   $token,5);
                   1235: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1236:     } elsif ($target eq 'modified' ) {
                   1237: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1238: 						     $safeeval,'show');
                   1239: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1240:     }
                   1241:     return $result;
1.7       tsai     1242: }
                   1243: 
                   1244: sub shuffle {
                   1245:     my $a=shift;
                   1246:     my $i;
1.303     albertel 1247:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1248: 	&Apache::response::pushrandomnumber();
1.159     albertel 1249: 	for($i=@$a;--$i;) {
                   1250: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1251: 	    next if $i == $j;
                   1252: 	    @$a[$i,$j] = @$a[$j,$i];
                   1253: 	}
1.251     albertel 1254: 	&Apache::response::poprandomnumber();
1.7       tsai     1255:     }
1.6       tsai     1256: }
                   1257: 
                   1258: sub end_randomlist {
1.159     albertel 1259:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1260:     my $result;
                   1261:     if ($target eq 'edit' ) {
                   1262: 	$result=&Apache::edit::tag_end($target,$token,
                   1263: 				       'End Randomly Parsed Block');
                   1264:     }
                   1265:     return $result;
1.6       tsai     1266: }
                   1267: 
1.283     albertel 1268: sub ordered_show_check {
                   1269:     my $last_part=$Apache::inputtags::partlist[-2];
                   1270:     my $in_order=
                   1271: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1272:     my $in_order_show=1;
                   1273:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1274: 	$in_order_show=&Apache::response::check_status($last_part);
                   1275:     }
                   1276:     return $in_order_show;
                   1277: }
                   1278: 
1.11      albertel 1279: sub start_part {
1.326     albertel 1280:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1281:     if (!$Apache::lonxml::metamode) {
                   1282: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1283: 	                                     # duedates.
                   1284:     }
1.159     albertel 1285:     my $result='';
                   1286:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1.296     albertel 1287:     if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1.159     albertel 1288:     $Apache::inputtags::part=$id;
1.177     albertel 1289:     push(@Apache::inputtags::partlist,$id);
                   1290:     @Apache::inputtags::response=();
1.159     albertel 1291:     @Apache::inputtags::previous=();
                   1292:     @Apache::inputtags::previous_version=();
1.241     albertel 1293:     $Apache::lonhomework::problemstatus=&get_problem_status($id);
1.159     albertel 1294:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1295:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1296:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1297:     my $in_order_show=&ordered_show_check();
1.214     albertel 1298:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1299:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1300:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1301: 
                   1302:     if ($target eq 'meta') {
1.224     www      1303: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1304: 	return &Apache::response::mandatory_part_meta.
                   1305: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1306:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1307: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1308: 	if ($hidden || !$in_order_show) {
1.326     albertel 1309: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1310: 	} else {
                   1311: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1312: 	    push (@Apache::inputtags::status,$status);
                   1313: 	    my $expression='$external::datestatus="'.$status.'";';
                   1314: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1315: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1316: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1317: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1318: 	    }
1.216     albertel 1319: 	    if (( $status eq 'CLOSED' ) ||
                   1320: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1321: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1322: 		( $status eq 'BANNED') ||
                   1323: 		( $status eq 'UNAVAILABLE') ||
                   1324: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1325: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1326: 							   $style);
1.159     albertel 1327: 		if ( $target eq "web" ) {
1.211     albertel 1328: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1329: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1330: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1331: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1332: 		    } else {
1.211     albertel 1333: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1334: 		    }
1.159     albertel 1335: 		}
                   1336: 	    } else {
                   1337: 		if ($target eq 'tex') {
1.284     albertel 1338: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1339: 			if ($$tagstack[-2] eq 'td') {
                   1340: 			    $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1341: 			} else {
                   1342: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1343: 			}
1.195     sakharuk 1344: 		    }
1.159     albertel 1345: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1346: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1347: 		    my @allkeys = split /,/,$allkeys;
                   1348: 		    my $allow_print_points = 0;
                   1349: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1350: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1351: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1352: 			}
                   1353: 		    }
1.275     albertel 1354: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1355: 		    if (defined($maxtries) && $maxtries < 0) {
                   1356: 			$allow_print_points=0;
                   1357: 		    }
1.302     albertel 1358: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1359: 				    '.disableexampointprint'}) eq 'yes') {
                   1360: 			$allow_print_points=0;
                   1361: 		    }
1.222     sakharuk 1362: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1363: 		} elsif ($target eq 'web') {
                   1364: 		    $result.='<a name="'.&Apache::lonnet::escape($Apache::inputtags::part).'" />';
1.159     albertel 1365: 		}
                   1366: 	    }
                   1367: 	}
                   1368:     } elsif ($target eq 'edit') {
                   1369: 	$result.=&Apache::edit::tag_start($target,$token);
                   1370: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1371: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1372: 	    '&nbsp;&nbsp;'.
                   1373: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1374: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1375:     } elsif ($target eq 'modified') {
                   1376: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1377: 						     $safeeval,'id','display');
1.159     albertel 1378: 	if ($constructtag) {
1.225     albertel 1379: 	    #limiting ids to only letters numbers, and space
1.224     www      1380: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1381: 	    $result = &Apache::edit::rebuild_tag($token);
                   1382: 	    $result.=&Apache::edit::handle_insert();
                   1383: 	}
                   1384:     }
                   1385:     return $result;
1.11      albertel 1386: }
                   1387: 
                   1388: sub end_part {
1.159     albertel 1389:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1390:     &Apache::lonxml::debug("in end_part $target ");
                   1391:     my $status=$Apache::inputtags::status['-1'];
                   1392:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1393:     my $in_order_show=&ordered_show_check();
1.321     albertel 1394:     my $result;
                   1395:     if (!$Apache::lonxml::metamode) {
                   1396: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1397: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1398:     }
1.312     albertel 1399:     if ($target eq 'grade') {
1.249     albertel 1400: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1401: 	    !$hidden && $in_order_show) {
1.311     foxr     1402: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1403: 	} else {
                   1404: 	    # move any submission data to .hidden
                   1405: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1406: 	}
1.283     albertel 1407:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1408: 	     !$hidden && $in_order_show) {
1.159     albertel 1409: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1410: 							$target);
1.212     albertel 1411: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1412: 	    $gradestatus='';
                   1413: 	}
1.311     foxr     1414: 	$result.=$gradestatus;
1.265     sakharuk 1415: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1416:     } elsif ($target eq 'edit') {
1.311     foxr     1417: 	$result.=&Apache::edit::end_table();
1.322     albertel 1418:     } elsif ($target eq 'modified') {
                   1419: 	 $result .= $token->[2];
                   1420: 	 $result.=&Apache::edit::handle_insertafter($token->[1]);
1.159     albertel 1421:     }
                   1422:     pop @Apache::inputtags::status;
                   1423:     $Apache::inputtags::part='';
1.295     albertel 1424:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1425:     return $result;
1.11      albertel 1426: }
1.1       albertel 1427: 
1.25      albertel 1428: sub start_preduedate {
1.326     albertel 1429:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1430:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1431: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1432: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1433: 	if (!$Apache::lonhomework::scantronmode &&
                   1434: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1435: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1436: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1437: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1438: 	}
1.24      albertel 1439:     }
1.159     albertel 1440:     return '';
1.24      albertel 1441: }
                   1442: 
1.25      albertel 1443: sub end_preduedate {
1.159     albertel 1444:     return '';
1.24      albertel 1445: }
                   1446: 
1.25      albertel 1447: sub start_postanswerdate {
1.326     albertel 1448:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1449:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade') {
1.300     albertel 1450: 	if ($Apache::lonhomework::scantronmode ||
                   1451: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1.326     albertel 1452: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1453: 	}
                   1454:     } elsif ($target eq 'tex') {
1.326     albertel 1455: 	&Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1456:     }
                   1457:     return '';
1.24      albertel 1458: }
                   1459: 
1.25      albertel 1460: sub end_postanswerdate {
1.159     albertel 1461:     return '';
1.24      albertel 1462: }
                   1463: 
1.25      albertel 1464: sub start_notsolved {
1.326     albertel 1465:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1466:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1467: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1468: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1469: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1470: 	if ($gradestatus =~ /^correct/ &&
                   1471: 	    &Apache::response::show_answer()) {
1.159     albertel 1472: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1473: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1474: 	}
1.24      albertel 1475:     }
1.159     albertel 1476:     return '';
1.24      albertel 1477: }
                   1478: 
1.25      albertel 1479: sub end_notsolved {
1.159     albertel 1480:     return '';
1.24      albertel 1481: }
                   1482: 
                   1483: sub start_solved {
1.326     albertel 1484:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1485:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1486: 	$target eq 'tex') {
                   1487: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1488: 	if ($gradestatus !~ /^correct/ ||
                   1489: 	    !&Apache::response::show_answer()) {
1.326     albertel 1490: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1491: 	}
1.24      albertel 1492:     }
1.159     albertel 1493:     return '';
1.24      albertel 1494: }
                   1495: 
                   1496: sub end_solved {
1.248     albertel 1497:     return '';
                   1498: }
                   1499: 
                   1500: sub start_problemtype {
1.326     albertel 1501:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1502:     my $result;
1.339     albertel 1503:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1504: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1505: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1506: 	if (!defined($mode)) { $mode='show'; }
                   1507: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1508: 	my $found=0;
                   1509: 	foreach my $type (split(',',$for)) {
                   1510: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1511: 	}
                   1512: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1513: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1514: 	}
                   1515: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1516: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1517: 	}
                   1518:     } elsif ($target eq 'edit') {
                   1519: 	$result .=&Apache::edit::tag_start($target,$token);
                   1520: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1521: 					   [['show','Show'],
                   1522: 					    ['hide','Hide']]
                   1523: 					   ,$token);
                   1524: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1525: 					     [ ['exam','Exam/Quiz Problem'],
                   1526: 					       ['survey','Survey'],
                   1527: 					       ['problem','Homework Problem'] ]
                   1528: 					     ,$token);
                   1529: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1530:     } elsif ($target eq 'modified') {
                   1531: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1532: 						     $safeeval,'mode','for');
                   1533: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1534:     }
                   1535:     return $result;
                   1536: }
                   1537: 
                   1538: sub end_problemtype {
1.159     albertel 1539:     return '';
1.24      albertel 1540: }
1.34      albertel 1541: 
                   1542: sub start_startouttext {
1.159     albertel 1543:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1544:     my @result=(''.'');
                   1545:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1546:     return (@result);
1.34      albertel 1547: }
1.159     albertel 1548: 
1.34      albertel 1549: sub end_startouttext {
1.326     albertel 1550:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1551:     my $result='';
                   1552:     my $text='';
                   1553: 
                   1554:     if ($target eq 'edit') {
1.326     albertel 1555: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.211     albertel 1556: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1557: <td>".&mt('Delete:').
1.159     albertel 1558:                  &Apache::edit::deletelist($target,$token)
                   1559: 		 ."</td>
1.42      albertel 1560: <td>".
1.159     albertel 1561:                  &Apache::edit::insertlist($target,$token).
                   1562: 		 &Apache::edit::end_row().
                   1563:                  &Apache::edit::start_spanning_row()."\n"
1.188     bowersj2 1564: 		 . &Apache::loncommon::helpLatexCheatsheet () .
1.255     www      1565: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1566:     }
                   1567:     if ($target eq 'modified') {
1.219     albertel 1568: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1569:     }
                   1570:     if ($target eq 'tex') {
                   1571: 	$result .= '\noindent ';
                   1572:     }
                   1573:     return $result;
1.34      albertel 1574: }
1.159     albertel 1575: 
1.34      albertel 1576: sub start_endouttext {
1.159     albertel 1577:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1578:     my $result='';
                   1579:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1580:     if ($target eq "modified") {
                   1581: 	$result='<endouttext />'.
                   1582: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1583:     return $result;
1.34      albertel 1584: }
1.159     albertel 1585: 
1.34      albertel 1586: sub end_endouttext {
1.159     albertel 1587:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1588:     my @result=('','');
                   1589:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1590:     return (@result);
1.34      albertel 1591: }
1.159     albertel 1592: 
1.45      albertel 1593: sub delete_startouttext {
1.326     albertel 1594:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1595:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 1596:     my $text=$$parser['-1']->get_text("/endouttext");
                   1597:     my $ntoken=$$parser['-1']->get_token();
                   1598:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1599:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1600:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1601:     # they did the last time round
                   1602:     &Apache::lonxml::increasedepth($ntoken);
                   1603:     &Apache::lonxml::decreasedepth($ntoken);
                   1604:     return 1;
1.193     www      1605: }
                   1606: 
                   1607: sub start_simpleeditbutton {
                   1608:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1609:     my $result='';
1.284     albertel 1610:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 1611: 	($target eq 'web') &&
1.330     albertel 1612:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 1613:         my $url=$env{'request.noversionuri'};
1.193     www      1614:         $url=~s/\?.*$//;
1.278     albertel 1615: 	my ($symb) = &Apache::lonxml::whichuser();
1.194     www      1616: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.278     albertel 1617:                 '<a href="'.$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      1618: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1619:     }
                   1620:     return $result;
                   1621: }
                   1622: 
                   1623: sub end_simpleeditbutton {
                   1624:     return '';
1.45      albertel 1625: }
1.34      albertel 1626: 
1.1       albertel 1627: 1;
                   1628: __END__

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