Annotation of loncom/homework/structuretags.pm, revision 1.353

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.353   ! albertel    4: # $Id: structuretags.pm,v 1.352 2006/04/20 19:07:09 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 $result;
1.48      albertel  331: }
                    332: 
1.65      albertel  333: sub initialize_storage {
1.353   ! albertel  334:     undef(%Apache::lonhomework::results);
        !           335:     undef(%Apache::lonhomework::history);
1.159     albertel  336:     my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.353   ! albertel  337:     
        !           338:     # anonymous users (CODEd exams) have no data
        !           339:     if ($name eq 'anonymous' 
        !           340: 	&& !defined($domain)) {
        !           341: 	return;
        !           342:     }
        !           343: 
1.333     albertel  344:     if ($env{'request.state'} eq 'construct' 
                    345: 	|| $symb eq ''
                    346: 	|| $Apache::lonhomework::type eq 'practice') {
                    347: 	
                    348: 	my $namespace = $symb || $env{'request.uri'};
                    349: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
                    350: 	    $env{'form.resetdata'} eq &mt('New Problem Variation') ||
                    351: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    352: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    353: 	    &Apache::lonxml::debug("Attempt reset");
                    354: 	}
1.159     albertel  355: 	%Apache::lonhomework::history=
1.333     albertel  356: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  357: 	my ($temp)=keys %Apache::lonhomework::history ;
                    358: 	&Apache::lonxml::debug("Return message of $temp");
                    359:     } else {
                    360: 	%Apache::lonhomework::history=
                    361: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    362:     }
1.353   ! albertel  363: 
1.159     albertel  364:     #ignore error conditions
1.67      albertel  365:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  366:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  367: }
                    368: 
                    369: # -------------------------------------------------------------finalize_storage
                    370: # Stores away the result has to a student's environment
                    371: # checks form.grade_ for specific values, other wises stores
                    372: # to the running users environment
1.285     raeburn   373: # Will increment totals for attempts, students, and corrects
                    374: # if running user has student role.  
1.65      albertel  375: sub finalize_storage {
1.159     albertel  376:     my $result;
1.289     albertel  377:     if (%Apache::lonhomework::results) {
1.323     albertel  378: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    379: 	delete(@Apache::lonhomework::results{@remove});
1.159     albertel  380: 	my ($symb,$courseid,$domain,$name) = &Apache::lonxml::whichuser();
1.333     albertel  381: 	if ($env{'request.state'} eq 'construct' 
                    382: 	    || $symb eq ''
                    383: 	    || $Apache::lonhomework::type eq 'practice') {
                    384: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  385: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  386: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  387: 					      $namespace,'',$domain,$name);
1.159     albertel  388: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    389: 	} else {
                    390: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    391: 					    $symb,$courseid,$domain,$name);
                    392: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   393:             if ($env{'request.role'} =~/^st/) {
                    394:                 &store_aggregates($symb,$courseid);
                    395:             }
1.159     albertel  396: 	}
1.323     albertel  397:     } else {
                    398: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  399:     }
1.159     albertel  400:     return $result;
1.65      albertel  401: }
1.289     albertel  402: use Data::Dumper;
1.65      albertel  403: 
1.285     raeburn   404: # -------------------------------------------------------------store_aggregates
                    405: # Sends hash of values to be incremented in nohist_resourcetracker.db
                    406: # for the course. Increments total number of attempts, unique students 
                    407: # and corrects for each part for an instance of a problem, as appropriate.
                    408: sub store_aggregates {
                    409:     my ($symb,$courseid) = @_;
1.286     albertel  410:     my %aggregate;
                    411:     my @parts;
1.288     albertel  412:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    413:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  414:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  415:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  416:             push(@parts, $1);
1.285     raeburn   417:         }
                    418:     }
1.286     albertel  419:     foreach my $part (@parts) {
                    420:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    421: 	    eq 'APPROX_ANS' ||
                    422: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    423: 	    eq 'EXACT_ANS') {
1.287     albertel  424:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   425:         }
1.286     albertel  426:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  427:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   428:         } else {
1.293     albertel  429:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   430:             if ($last_reset) {
1.293     albertel  431:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   432:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    433:                 }
                    434:             }
1.285     raeburn   435:         }
1.287     albertel  436:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   437:     }
1.292     raeburn   438:     if (keys (%aggregate) > 0) {
1.289     albertel  439: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   440:                             $cdomain,$cname);
                    441:     }
                    442: }
1.289     albertel  443: 
1.65      albertel  444: sub checkout_msg {
1.211     albertel  445:     my %lt=&Apache::lonlocal::texthash( 
                    446: 		'resource'=>'The resource needs to be checked out',
                    447: 		'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.',
                    448:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    449:                 'checkout'=>'Check out Exam for Viewing',
                    450: 		'checkout?'=>'Check out Exam?');
1.352     albertel  451:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.159     albertel  452:     return (<<ENDCHECKOUT);
1.211     albertel  453: <h2>$lt{'resource'}</h2>
                    454:     <p>$lt{'id_expln'}</p>
                    455: <font color="red">
                    456: <p>$lt{'warning'}</p>
1.91      albertel  457: </font>
1.352     albertel  458: <form name="checkout" method="POST" action="$uri">
1.91      albertel  459: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  460: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  461: </form>
                    462: ENDCHECKOUT
                    463: }
                    464: 
1.252     albertel  465: sub firstaccess_msg {
1.253     albertel  466:     my ($time,$symb)=@_;
                    467:     my ($map)=&Apache::lonnet::decode_symb($symb);
                    468:     my $foldertitle=&Apache::lonnet::gettitle($map);
                    469:     &Apache::lonxml::debug("map is $map title is $foldertitle");
1.352     albertel  470:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.252     albertel  471:     return (<<ENDCHECKOUT);
1.253     albertel  472: <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>
1.352     albertel  473: <form name="markaccess" method="POST" action="$uri">
1.252     albertel  474: <input type="hidden" name="markaccess" value="yes" />
                    475: <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
                    476: </form>
                    477: ENDCHECKOUT
                    478: }
                    479: 
1.204     albertel  480: sub init_problem_globals {
                    481:     my ($type)=@_;
                    482:     #initialize globals
1.308     foxr      483:     #   For problems, we start out in part 0 (outside a <part> tag).
                    484:     #   and part 0 is used to describe the main body of the <problem>
                    485:     #
1.204     albertel  486:     if ($type eq 'problem') {
                    487: 	$Apache::inputtags::part='0';
                    488: 	@Apache::inputtags::partlist=('0');
1.266     albertel  489: 	$Apache::lonhomework::problemstatus=&get_problem_status('0');
                    490: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      491: 
1.266     albertel  492:     } elsif ($type eq 'library') {
1.204     albertel  493: 	$Apache::inputtags::part='';
                    494: 	@Apache::inputtags::partlist=();
                    495: 	$Apache::lonhomework::problemstatus='';	
1.266     albertel  496: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      497: 
1.304     albertel  498:     } elsif ($type eq 'Task') {
                    499: 	$Apache::inputtags::part='0';
                    500: 	@Apache::inputtags::partlist=('0');
                    501: 	$Apache::lonhomework::problemstatus='';	
                    502: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  503:     }
                    504:     @Apache::inputtags::responselist = ();
                    505:     @Apache::inputtags::importlist = ();
                    506:     @Apache::inputtags::previous=();
                    507:     @Apache::inputtags::previous_version=();
                    508:     $Apache::structuretags::printanswer='No';
                    509:     @Apache::structuretags::whileconds=();
                    510:     @Apache::structuretags::whilebody=();
                    511:     @Apache::structuretags::whileline=();
                    512:     $Apache::lonhomework::scantronmode=0;
                    513:     undef($Apache::lonhomework::name);
                    514: 
                    515: }
                    516: 
                    517: sub reset_problem_globals {
                    518:     my ($type)=@_;
                    519:     undef(%Apache::lonhomework::history);
                    520:     undef(%Apache::lonhomework::results);
                    521:     undef($Apache::inputtags::part);
1.208     albertel  522: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    523: #detect if we try to do 2 problems in one file
                    524: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  525:     undef($Apache::lonhomework::name);
                    526: }
                    527: 
1.241     albertel  528: sub set_problem_state {
1.240     albertel  529:     my ($part)=@_;
1.284     albertel  530:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  531: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    532: 	    'correct_by_student';
                    533:     }
                    534: }
                    535: 
1.241     albertel  536: sub get_problem_status {
                    537:     my ($part)=@_;
1.267     albertel  538:     my $problem_status;
1.284     albertel  539:     if ($env{'request.state'} eq 'construct' &&
                    540: 	defined($env{'form.problemstatus'})) {
                    541: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  542:     } else {
                    543: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    544: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  545: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  546:     }
                    547:     return $problem_status;
                    548: }
                    549: 
1.9       albertel  550: sub start_problem {
1.326     albertel  551:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel  552: 
1.311     foxr      553:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  554:     if (!$Apache::lonxml::metamode) {
                    555: 	&Apache::lonxml::startredirection();
                    556:     }
1.311     foxr      557: 
1.308     foxr      558:     # Problems don't nest and we don't allow more than one <problem> in
                    559:     # a .problem file.
                    560:     #
1.184     albertel  561:     if ( $Apache::inputtags::part ne '' ||
                    562: 	 $Apache::lonhomework::parsing_a_problem) {
                    563: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel  564: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel  565: 	return '';
                    566:     }
1.184     albertel  567: 
                    568:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  569:     &init_problem_globals('problem');
1.166     albertel  570: 
1.284     albertel  571:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  572: 	$Apache::lonhomework::scantronmode=1;
                    573:     }
1.161     albertel  574: 
1.246     albertel  575:     &initialize_storage();
1.159     albertel  576:     if ($target ne 'analyze') {
                    577: 	if ($target eq 'web') {
                    578: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
1.238     albertel  579: 	}
1.284     albertel  580:        	if ($env{'request.state'} eq 'construct') { &set_problem_state('0'); }
1.159     albertel  581: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.284     albertel  582: 	if (($env{'request.state'} eq 'construct') &&
                    583: 	    defined($env{'form.problemtype'})) {
                    584: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  585: 	}
1.332     albertel  586: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  587:     }
1.164     albertel  588:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  589: 	my $uri=$env{'request.uri'};
1.159     albertel  590: 	if ($uri=~/\.(\w+)$/) {
                    591: 	    $Apache::lonhomework::type=$1;
                    592: 	    &Apache::lonxml::debug("Using type of $1");
                    593: 	} else {
                    594: 	    $Apache::lonhomework::type='problem';
                    595: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    596: 	}
1.87      albertel  597:     }
1.301     albertel  598:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       599: 
1.159     albertel  600:     #added vars to the scripting enviroment
1.213     albertel  601:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  602:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  603:     &Apache::run::run($expression,$safeeval);
1.159     albertel  604:     my $status;
                    605:     my $accessmsg;
                    606: 
1.343     albertel  607:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel  608:     my ($result,$form_tag_start);
                    609:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex') {
                    610: 	($result,$form_tag_start) =
                    611: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    612: 			$name);
                    613:     }
                    614: 
1.284     albertel  615:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  616: 
                    617:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    618:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    619: 	$target eq 'tex') {
                    620: 	#handle exam checkout
                    621: 	if ($Apache::lonhomework::type eq 'exam') {
                    622: 	    my $token=
                    623: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  624: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  625: 		$token=&Apache::lonxml::maketoken();
                    626: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    627: 		    $token;
                    628: 	    }
1.343     albertel  629: 	    $result.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  630: 	}
1.284     albertel  631: 	if ($env{'form.markaccess'}) {
1.252     albertel  632: 	    &Apache::lonnet::set_first_access('map');
                    633: 	}
1.159     albertel  634: 	#handle rand seed in construction space
                    635: 	my $rndseed=&setup_rndseed($safeeval);
1.162     albertel  636: 	my ($symb)=&Apache::lonxml::whichuser();
1.333     albertel  637: 	if ($env{'request.state'} ne "construct" && 
                    638: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  639: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    640: 		$rndseed.'" />'.
                    641: 		    '<input type="submit" name="resetdata"
1.334     albertel  642:                              value="'.&mt('New Problem Variation').'" />';
                    643: 	    if (exists($env{'form.username'})) {
                    644: 		$form_tag_start.=
1.164     albertel  645: 		    '<input type="hidden" name="username"
1.284     albertel  646:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  647: 	    }
1.333     albertel  648: 	    if ($env{'request.role.adv'}) {
1.267     albertel  649: 		$form_tag_start.=
1.300     albertel  650: 		    ' <label><input type="checkbox" name="showallfoils" ';
1.284     albertel  651: 		if (defined($env{'form.showallfoils'})) {
1.267     albertel  652: 		    $form_tag_start.='checked="on"';
                    653: 		}
1.300     albertel  654: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    655: 		    '</label>';
1.267     albertel  656: 	    }
                    657: 	    $form_tag_start.='<hr />';
1.162     albertel  658: 	}
1.324     albertel  659: 
                    660: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    661: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  662: 	push (@Apache::inputtags::status,$status);
1.324     albertel  663: 
1.159     albertel  664: 	my $expression='$external::datestatus="'.$status.'";';
                    665: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    666: 	&Apache::run::run($expression,$safeeval);
                    667: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  668: 
1.159     albertel  669: 	if (( $status eq 'CLOSED' ) ||
                    670: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  671: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  672: 	    ( $status eq 'BANNED') ||
1.216     albertel  673: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  674: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  675: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  676: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    677: 						       $style);
1.159     albertel  678: 	    if ( $target eq "web" ) {
1.343     albertel  679: 		my $msg;
1.159     albertel  680: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  681: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  682: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  683: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  684: 		}
1.216     albertel  685: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.159     albertel  686: 		    $msg.='The problem '.$accessmsg;
                    687: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel  688: 		    $msg.=&checkout_msg();
1.252     albertel  689: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  690: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  691: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
                    692: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work.");
1.159     albertel  693: 		}
                    694: 		$result.=$msg.'<br />';
                    695: 	    } elsif ($target eq 'tex') {
1.332     albertel  696: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    697: 		                    : '\begin{minipage}{\textwidth}';
                    698: 		$result.='\begin{document}\noindent \vskip 1 mm '.
                    699: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  700: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  701: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  702: 		} else {
1.211     albertel  703: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  704: 		}
                    705: 	    }
1.324     albertel  706: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  707: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    708: 						       $style);
1.324     albertel  709: 	    if ($target eq 'web') {
                    710: 		$result .= &Apache::bridgetask::proctor_validation_screen();
                    711: 	    } elsif ($target eq 'grade') {
                    712: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                    713: 							'problem');
                    714: 	    }
1.159     albertel  715: 	} elsif ($target eq 'web') {
1.343     albertel  716: 	    $result.="\n $form_tag_start".	
1.227     albertel  717: 	      '<input type="hidden" name="submitted" value="yes" />';
                    718: 	    # create a page header and exit
1.284     albertel  719: 	    if ($env{'request.state'} eq "construct") {
                    720: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.227     albertel  721: 	    }
                    722: 	    # if we are viewing someone else preserve that info
1.284     albertel  723: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel  724: 		foreach my $field ('symb','courseid','domain','username') {
                    725: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel  726: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel  727: 		}
                    728: 	    }
                    729: 	} elsif ($target eq 'tex') {
1.319     foxr      730: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                    731: 
1.99      sakharuk  732: 	}
1.159     albertel  733:     } elsif ($target eq 'edit') {
1.343     albertel  734: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel  735: 	$Apache::lonxml::warnings_error_header=
                    736: 	    &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  737: 	my $temp=&Apache::edit::insertlist($target,$token);
                    738: 	$result.=$temp;
                    739:     } elsif ($target eq 'modified') {
                    740: 	$result=$token->[4];
                    741: 	$result.=&Apache::edit::handle_insert();
                    742:     } else {
                    743: 	# page_start returned a starting result, delete it if we don't need it
                    744: 	$result = '';
1.99      sakharuk  745:     }
1.159     albertel  746:     return $result;
1.9       albertel  747: }
                    748: 
                    749: sub end_problem {
1.159     albertel  750:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel  751:     my $result;
1.310     foxr      752: 
1.321     albertel  753:     if (!$Apache::lonxml::metamode) {
                    754: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel  755: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel  756:     }
1.319     foxr      757: 
                    758:     if ($target eq 'tex') {
1.321     albertel  759: 
                    760: 	# Figure out the front matter and replace the
                    761: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                    762: 	# this in end_problem because whether or not we display due
                    763: 	# dates depends on whether due dates have already been
                    764: 	# displayed in the problem parts.
                    765: 
1.319     foxr      766: 	my $frontmatter   = '';
                    767: 	my $startminipage = '';
                    768: 	if (not $env{'form.problem_split'}=~/yes/) {
                    769: 	    $startminipage = '\begin{minipage}{\textwidth}';
                    770: 	}
                    771: 	my $id = $Apache::inputtags::part;
                    772: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                    773: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                    774: 	my @packages = split /,/,$packages;
                    775: 	my $allow_print_points = 0;
                    776: 	foreach my $partial_key (@packages) {
                    777: 	    if ($partial_key=~m/^part_0$/) {
                    778: 		$allow_print_points=1;
                    779: 	    }
                    780: 	}
                    781: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    782: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                    783: 	if (lc($env{'course.'.$env{'request.course.id'}.
                    784: 			'.disableexampointprint'}) eq 'yes') {
                    785: 	    $allow_print_points=0;
                    786: 	}
                    787: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
                    788: 	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 ';
                    789: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                    790: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                    791: 	
                    792: 	#  Figure out what the due date is and if we need to print
                    793: 	#  it in the problem header.  We have been logging the
                    794: 	#  last due date written to file. 
                    795: 	
                    796: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    797: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
                    798: 	my $temp_file;
                    799: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                    800: 	
                    801: 	# Figure out what the last printed due date is or set it
                    802: 	# to the epoch if no duedates have been printed.
                    803: 	
                    804: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                    805: 	if (-e $filename) {
                    806: 	    $temp_file = Apache::File->new($filename);
                    807: 	    my @due_file      = <$temp_file>;
                    808: 	    $due_file_content = $due_file[$#due_file];
                    809: 	    chomp $due_file_content;
                    810: 	} 
                    811: 	
                    812: 	# We display the due date iff it is not the same as the last
                    813: 	# duedate in problem header ($due_file_content), and
                    814: 	# none of our parts displayed a duedate.
                    815: 	#
                    816: 	my $parts_with_displayduedate;
                    817: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                    818: 	    $parts_with_displayduedate = 
                    819: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                    820: 	} else {
                    821: 	    $parts_with_displayduedate = 0;
                    822: 	}
                    823: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                    824: 	    $temp_file = Apache::File->new('>'.$filename);
                    825: 	    print $temp_file "$duetime\n";
                    826: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    827: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                    828: 		    $frontmatter .= $begin_doc.
                    829: 			'\textit{Due date: '.$duedate.'} '.$toc_line;
                    830: 		} else {
                    831: 		    $frontmatter.= $begin_doc.$toc_line;
                    832: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    833: 		}
                    834: 	    } else {
                    835: 		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
                    836: 	    }
                    837: 	} else {
                    838: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    839: 		$frontmatter .= $begin_doc.$toc_line;
                    840: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    841: 	    } else {
                    842: 		$frontmatter .= '\vskip 1mm \\\\\\\\';
                    843: 	    }
                    844: 	}
                    845: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                    846:     }
                    847: 
1.159     albertel  848:     my $status=$Apache::inputtags::status['-1'];
                    849:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    850: 	$target eq 'tex') {
1.249     albertel  851: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel  852: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel  853: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                    854: 		&Apache::inputtags::grade;
1.324     albertel  855: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                    856: 		# no need to grade, and don't want to hide data
1.249     albertel  857: 	    } else {
                    858: 		# move any submission data to .hidden
                    859: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                    860: 	    }
1.159     albertel  861: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    862: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel  863: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel  864: 	    # if part is zero, no <part>s existed, so we need show the current
                    865: 	    # grading status
                    866: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    867: 	    $result.= $gradestatus;
                    868: 	}
                    869: 	if (
1.284     albertel  870: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel  871: 	    ($target eq 'answer') || ($target eq 'tex')
                    872: 	   ) {
1.227     albertel  873: 	    if ($target ne 'tex' &&
1.284     albertel  874: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www       875: 		$result.="</form>";
1.348     albertel  876: 		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
1.159     albertel  877: 	    }
                    878: 	    if ($target eq 'web') {
1.346     albertel  879: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel  880: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  881: 		my $endminipage = '';
1.284     albertel  882: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk  883: 		    $endminipage = '\end{minipage}';
                    884: 		}
1.284     albertel  885:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk  886: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel  887: 		} else {
1.262     sakharuk  888: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel  889: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk  890: 			$result .= $endminipage.'\end{document} ';
                    891: 		    } else {
                    892: 			$result .= '';
                    893: 		    }
1.159     albertel  894: 		}
                    895: 	    }
                    896: 	}
                    897: 	if ($target eq 'grade') {
                    898: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    899: 	    &finalize_storage();
                    900: 	}
1.284     albertel  901: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                    902: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel  903: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel  904: 	                        # normally we get it from above, but in CSTR
1.172     albertel  905: 	                        # we always show answer mode too.
1.159     albertel  906: 	}
                    907:     } elsif ($target eq 'meta') {
                    908: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  909: 	    @Apache::inputtags::response=();
1.159     albertel  910: 	    $result=&Apache::response::mandatory_part_meta;
                    911: 	}
1.215     albertel  912: 	$result.=&Apache::response::meta_part_order();
1.258     albertel  913: 	$result.=&Apache::response::meta_response_order();
1.159     albertel  914:     } elsif ($target eq 'edit') {
                    915: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel  916: 	$result .= &problem_edit_footer();
1.320     albertel  917:     } elsif ($target eq 'modified') {
                    918: 	 $result .= $token->[2];
                    919: 	 $result.=&Apache::edit::handle_insertafter($token->[1]);
1.159     albertel  920:     }
1.155     albertel  921: 
1.284     albertel  922:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel  923: 	&Apache::inputtags::check_for_duplicate_ids();
                    924:     }
1.204     albertel  925: 
                    926:     &reset_problem_globals('problem');
1.159     albertel  927: 
                    928:     return $result;
1.48      albertel  929: }
                    930: 
1.108     albertel  931: 
1.48      albertel  932: sub start_library {
1.159     albertel  933:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel  934:     my ($result,$form_tag_start);
1.244     albertel  935:     if ($$tagstack[0] eq 'library') {
                    936: 	&init_problem_globals('library');
                    937: 	$Apache::lonhomework::type='problem';
                    938:     }
1.159     albertel  939:     if ($target eq 'edit') {
1.343     albertel  940: 	($result,$form_tag_start)=
                    941: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    942: 			'Edit');
                    943: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel  944: 	my $temp=&Apache::edit::insertlist($target,$token);
                    945: 	$result.=$temp;
                    946:     } elsif ($target eq 'modified') {
                    947: 	$result=$token->[4];
                    948: 	$result.=&Apache::edit::handle_insert();
1.340     albertel  949:     } elsif (($target eq 'web' || $target eq 'webgrade')
                    950: 	     && $$tagstack[0] eq 'library' 
                    951: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel  952: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel  953: 	($result,$form_tag_start)=
                    954: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    955: 			$name);
1.159     albertel  956: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel  957: 	$result.=" \n $form_tag_start".	
1.159     albertel  958: 		  '<input type="hidden" name="submitted" value="yes" />';
                    959: 	$result.=&problem_web_to_edit_header($rndseed);
                    960:     }
                    961:     return $result;
1.48      albertel  962: }
                    963: 
                    964: sub end_library {
1.159     albertel  965:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    966:     my $result='';
                    967:     if ($target eq 'edit') {
                    968: 	$result=&problem_edit_footer();
                    969:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel  970: 	     $env{'request.state'} eq "construct") {
1.349     albertel  971: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel  972:     }
1.204     albertel  973:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel  974:     return $result;
1.197     www       975: }
                    976: 
                    977: sub start_definetag {
1.326     albertel  978:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www       979: 
                    980:     my $result;
                    981: 
                    982:     my $name = $token->[2]->{'name'};
1.326     albertel  983:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.197     www       984:     if ($name=~/^\//) {
                    985: 	$result=
                    986:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                    987:     } else {
                    988: 	$result=
                    989:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                    990:     }
                    991:     $skip=~s/\</\&lt\;/gs;
                    992:     $skip=~s/\>/\&gt\;/gs;
                    993:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                    994:     return $result;
                    995: }
                    996: 
                    997: sub end_definetag {
                    998:     return '';
1.1       albertel  999: }
                   1000: 
                   1001: sub start_block {
1.201     albertel 1002:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1003: 
                   1004:     my $result;
1.1       albertel 1005: 
1.339     albertel 1006:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1007: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1008: 	my $code = $token->[2]->{'condition'};
1.201     albertel 1009: 	if (defined($code)) {
1.137     albertel 1010: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1011: 		&Apache::lonxml::default_homework_load($safeeval);
                   1012: 	    }
1.131     albertel 1013: 	    $result = &Apache::run::run($code,$safeeval);
                   1014: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1015: 	} else {
                   1016: 	    $result='1';
                   1017: 	}
                   1018: 	if ( ! $result ) {
1.201     albertel 1019: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1020: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1021: 	}
                   1022: 	$result='';
                   1023:     } elsif ($target eq 'edit') {
                   1024: 	$result .=&Apache::edit::tag_start($target,$token);
                   1025: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1026: 					  $token,40);
                   1027: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1028:     } elsif ($target eq 'modified') {
                   1029: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1030: 						     $safeeval,'condition');
                   1031: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1032:     }
1.131     albertel 1033:     return $result;
1.1       albertel 1034: }
                   1035: 
                   1036: sub end_block {
1.167     www      1037:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1038:     my $result;
                   1039:     if ($target eq "edit") {
                   1040: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1041:     }
                   1042:     return $result;
                   1043: }
                   1044: 
                   1045: sub start_languageblock {
1.201     albertel 1046:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1047: 
                   1048:     my $result;
                   1049: 
1.339     albertel 1050:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1051: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1052: 	my $include = $token->[2]->{'include'};
                   1053: 	my $exclude = $token->[2]->{'exclude'};
                   1054:         my %languages=&Apache::loncommon::display_languages();
                   1055:         $result='1';
                   1056: 	if ($include) {
                   1057:             $result='';
                   1058:             foreach (split(/\,/,$include)) {
                   1059:                 if ($languages{$_}) { $result='1'; }
                   1060:             }
                   1061: 	}
                   1062:         if ($exclude) {
                   1063:             foreach (split(/\,/,$exclude)) {
                   1064:                 if ($languages{$_}) { $result='0'; }
                   1065:             }
                   1066: 	}
                   1067: 	if ( ! $result ) {
                   1068: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1069: 						   $style);
                   1070: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1071: 	}
                   1072: 	$result='';
1.167     www      1073:     } elsif ($target eq 'edit') {
                   1074: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1075: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1076: 					  $token,40);
1.211     albertel 1077: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1078: 					  $token,40);
                   1079: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1080:     } elsif ($target eq 'modified') {
                   1081: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1082: 						     $safeeval,'include',
                   1083: 						     'exclude');
1.167     www      1084: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1085:     }
                   1086:     return $result;
                   1087: }
                   1088: 
                   1089: sub end_languageblock {
1.170     www      1090:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1091:     my $result;
1.201     albertel 1092:     if ($target eq "edit") {
1.170     www      1093: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1094:     }
                   1095:     return $result;
                   1096: }
                   1097: 
                   1098: sub start_instructorcomment {
1.201     albertel 1099:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1100: 
                   1101:     my $result;
                   1102: 
1.339     albertel 1103:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1104: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.284     albertel 1105:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1106: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1107: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1108: 						   $parser,$style);
1.170     www      1109: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1110: 	}
                   1111: 	$result='';
                   1112:     } elsif ($target eq 'edit') {
                   1113: 	$result .=&Apache::edit::tag_start($target,$token);
                   1114: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1115:     }
                   1116:     return $result;
                   1117: }
                   1118: 
                   1119: sub end_instructorcomment {
1.159     albertel 1120:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1121:     my $result;
                   1122:     if ($target eq "edit") {
                   1123: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1124:     }
                   1125:     return $result;
1.4       tsai     1126: }
                   1127: 
                   1128: sub start_while {
1.326     albertel 1129:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1130: 
1.160     albertel 1131:     my $result;
1.339     albertel 1132:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1133: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1134: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1135: 
1.160     albertel 1136: 	push( @Apache::structuretags::whileconds, $code);
                   1137: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1138: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1139: 	}
                   1140: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1141: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1142: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1143: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1144: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1145: 	if ( $result ) {
                   1146: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1147: 	}
                   1148:     } elsif ($target eq 'edit') {
                   1149: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1150: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1151: 					  $token,40);
                   1152: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1153:     } elsif ($target eq 'modified') {
                   1154: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1155: 						     $safeeval,'condition');
                   1156: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1157:     }
1.160     albertel 1158:     return $result;
1.4       tsai     1159: }
                   1160: 
                   1161: sub end_while {
1.159     albertel 1162:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1163:     my $result;
                   1164: 
1.339     albertel 1165:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1166: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1167: 	my $code = pop(@Apache::structuretags::whileconds);
                   1168: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1169: 	my $line = pop(@Apache::structuretags::whileline);
                   1170: 	my $return = &Apache::run::run($code,$safeeval);
                   1171: 	my $starttime=time;
                   1172: 	my $error=0;
                   1173: 	while ($return) {
                   1174: 	    if (time-$starttime >
                   1175: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.270     albertel 1176: 		#$return = 0; $error=1; next;
1.161     albertel 1177: 	    }
                   1178: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                   1179: 	    $return = &Apache::run::run($code,$safeeval);
                   1180: 	}
                   1181: 	if ($error) {
1.270     albertel 1182: 	    &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 1183: 	}
                   1184:     } elsif ($target eq "edit") {
                   1185: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1186:     }
1.160     albertel 1187:     return $result;
1.1       albertel 1188: }
1.6       tsai     1189: 
1.160     albertel 1190: # <randomlist show="1">
1.6       tsai     1191: #  <tag1>..</tag1>
                   1192: #  <tag2>..</tag2>
                   1193: #  <tag3>..</tag3>
1.160     albertel 1194: #  ...
1.6       tsai     1195: # </randomlist>
                   1196: sub start_randomlist {
1.326     albertel 1197:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1198:     my $result;
1.339     albertel 1199:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1200: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1201: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1202: 	my $b_parser= HTML::LCParser->new(\$body);
                   1203: 	$b_parser->xml_mode(1);
                   1204: 	$b_parser->marked_sections(1);
1.159     albertel 1205: 	my $b_tok;
                   1206: 	my @randomlist;
                   1207: 	my $list_item;
                   1208: 	while($b_tok = $b_parser->get_token() ) {
                   1209: 	    if($b_tok->[0] eq 'S') { # start tag
                   1210: 		# get content of the tag until matching end tag
                   1211: 		# get all text upto the matching tag
                   1212: 		# and push the content into @randomlist
                   1213: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1214: 							   $b_parser);
                   1215: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1216: 		push(@randomlist,$list_item);
                   1217: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1218:                 #         $list_item</b>";
                   1219: 	    }
                   1220: 	    if($b_tok->[0] eq 'T') { # text
                   1221: 		# what to do with text in between tags?
                   1222: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1223: 	    }
                   1224: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1225: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1226: 	    # }
                   1227: 	}
1.303     albertel 1228: 	if (@randomlist) {
                   1229: 	    my @idx_arr = (0 .. $#randomlist);
                   1230: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1231: 	    my $bodytext = '';
                   1232: 	    my $show=$#randomlist;
                   1233: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1234: 	    $showarg--;
                   1235: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                   1236: 	    for(0 .. $show) {
                   1237: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1238: 	    }
                   1239: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1240: 	}
                   1241:     } elsif ($target eq 'edit' ) {
                   1242: 	$result .=&Apache::edit::tag_start($target,$token);
                   1243: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1244: 					   $token,5);
                   1245: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1246:     } elsif ($target eq 'modified' ) {
                   1247: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1248: 						     $safeeval,'show');
                   1249: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1250:     }
                   1251:     return $result;
1.7       tsai     1252: }
                   1253: 
                   1254: sub shuffle {
                   1255:     my $a=shift;
                   1256:     my $i;
1.303     albertel 1257:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1258: 	&Apache::response::pushrandomnumber();
1.159     albertel 1259: 	for($i=@$a;--$i;) {
                   1260: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1261: 	    next if $i == $j;
                   1262: 	    @$a[$i,$j] = @$a[$j,$i];
                   1263: 	}
1.251     albertel 1264: 	&Apache::response::poprandomnumber();
1.7       tsai     1265:     }
1.6       tsai     1266: }
                   1267: 
                   1268: sub end_randomlist {
1.159     albertel 1269:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1270:     my $result;
                   1271:     if ($target eq 'edit' ) {
                   1272: 	$result=&Apache::edit::tag_end($target,$token,
                   1273: 				       'End Randomly Parsed Block');
                   1274:     }
                   1275:     return $result;
1.6       tsai     1276: }
                   1277: 
1.283     albertel 1278: sub ordered_show_check {
                   1279:     my $last_part=$Apache::inputtags::partlist[-2];
                   1280:     my $in_order=
                   1281: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1282:     my $in_order_show=1;
                   1283:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1284: 	$in_order_show=&Apache::response::check_status($last_part);
                   1285:     }
                   1286:     return $in_order_show;
                   1287: }
                   1288: 
1.11      albertel 1289: sub start_part {
1.326     albertel 1290:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1291:     if (!$Apache::lonxml::metamode) {
                   1292: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1293: 	                                     # duedates.
                   1294:     }
1.159     albertel 1295:     my $result='';
                   1296:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1.296     albertel 1297:     if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1.159     albertel 1298:     $Apache::inputtags::part=$id;
1.177     albertel 1299:     push(@Apache::inputtags::partlist,$id);
                   1300:     @Apache::inputtags::response=();
1.159     albertel 1301:     @Apache::inputtags::previous=();
                   1302:     @Apache::inputtags::previous_version=();
1.241     albertel 1303:     $Apache::lonhomework::problemstatus=&get_problem_status($id);
1.159     albertel 1304:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1305:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1306:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1307:     my $in_order_show=&ordered_show_check();
1.214     albertel 1308:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1309:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1310:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1311: 
                   1312:     if ($target eq 'meta') {
1.224     www      1313: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1314: 	return &Apache::response::mandatory_part_meta.
                   1315: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1316:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1317: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1318: 	if ($hidden || !$in_order_show) {
1.326     albertel 1319: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1320: 	} else {
                   1321: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1322: 	    push (@Apache::inputtags::status,$status);
                   1323: 	    my $expression='$external::datestatus="'.$status.'";';
                   1324: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1325: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1326: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1327: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1328: 	    }
1.216     albertel 1329: 	    if (( $status eq 'CLOSED' ) ||
                   1330: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1331: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1332: 		( $status eq 'BANNED') ||
                   1333: 		( $status eq 'UNAVAILABLE') ||
                   1334: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1335: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1336: 							   $style);
1.159     albertel 1337: 		if ( $target eq "web" ) {
1.211     albertel 1338: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1339: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1340: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1341: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1342: 		    } else {
1.211     albertel 1343: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1344: 		    }
1.159     albertel 1345: 		}
                   1346: 	    } else {
                   1347: 		if ($target eq 'tex') {
1.284     albertel 1348: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1349: 			if ($$tagstack[-2] eq 'td') {
                   1350: 			    $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1351: 			} else {
                   1352: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1353: 			}
1.195     sakharuk 1354: 		    }
1.159     albertel 1355: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1356: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1357: 		    my @allkeys = split /,/,$allkeys;
                   1358: 		    my $allow_print_points = 0;
                   1359: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1360: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1361: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1362: 			}
                   1363: 		    }
1.275     albertel 1364: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1365: 		    if (defined($maxtries) && $maxtries < 0) {
                   1366: 			$allow_print_points=0;
                   1367: 		    }
1.302     albertel 1368: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1369: 				    '.disableexampointprint'}) eq 'yes') {
                   1370: 			$allow_print_points=0;
                   1371: 		    }
1.222     sakharuk 1372: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1373: 		} elsif ($target eq 'web') {
                   1374: 		    $result.='<a name="'.&Apache::lonnet::escape($Apache::inputtags::part).'" />';
1.159     albertel 1375: 		}
                   1376: 	    }
                   1377: 	}
                   1378:     } elsif ($target eq 'edit') {
                   1379: 	$result.=&Apache::edit::tag_start($target,$token);
                   1380: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1381: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1382: 	    '&nbsp;&nbsp;'.
                   1383: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1384: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1385:     } elsif ($target eq 'modified') {
                   1386: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1387: 						     $safeeval,'id','display');
1.159     albertel 1388: 	if ($constructtag) {
1.225     albertel 1389: 	    #limiting ids to only letters numbers, and space
1.224     www      1390: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1391: 	    $result = &Apache::edit::rebuild_tag($token);
                   1392: 	    $result.=&Apache::edit::handle_insert();
                   1393: 	}
                   1394:     }
                   1395:     return $result;
1.11      albertel 1396: }
                   1397: 
                   1398: sub end_part {
1.159     albertel 1399:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1400:     &Apache::lonxml::debug("in end_part $target ");
                   1401:     my $status=$Apache::inputtags::status['-1'];
                   1402:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1403:     my $in_order_show=&ordered_show_check();
1.321     albertel 1404:     my $result;
                   1405:     if (!$Apache::lonxml::metamode) {
                   1406: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1407: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1408:     }
1.312     albertel 1409:     if ($target eq 'grade') {
1.249     albertel 1410: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1411: 	    !$hidden && $in_order_show) {
1.311     foxr     1412: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1413: 	} else {
                   1414: 	    # move any submission data to .hidden
                   1415: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1416: 	}
1.283     albertel 1417:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1418: 	     !$hidden && $in_order_show) {
1.159     albertel 1419: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1420: 							$target);
1.212     albertel 1421: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1422: 	    $gradestatus='';
                   1423: 	}
1.311     foxr     1424: 	$result.=$gradestatus;
1.265     sakharuk 1425: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1426:     } elsif ($target eq 'edit') {
1.311     foxr     1427: 	$result.=&Apache::edit::end_table();
1.322     albertel 1428:     } elsif ($target eq 'modified') {
                   1429: 	 $result .= $token->[2];
                   1430: 	 $result.=&Apache::edit::handle_insertafter($token->[1]);
1.159     albertel 1431:     }
                   1432:     pop @Apache::inputtags::status;
                   1433:     $Apache::inputtags::part='';
1.295     albertel 1434:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1435:     return $result;
1.11      albertel 1436: }
1.1       albertel 1437: 
1.25      albertel 1438: sub start_preduedate {
1.326     albertel 1439:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1440:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1441: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1442: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1443: 	if (!$Apache::lonhomework::scantronmode &&
                   1444: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1445: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1446: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1447: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1448: 	}
1.24      albertel 1449:     }
1.159     albertel 1450:     return '';
1.24      albertel 1451: }
                   1452: 
1.25      albertel 1453: sub end_preduedate {
1.159     albertel 1454:     return '';
1.24      albertel 1455: }
                   1456: 
1.25      albertel 1457: sub start_postanswerdate {
1.326     albertel 1458:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1459:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade') {
1.300     albertel 1460: 	if ($Apache::lonhomework::scantronmode ||
                   1461: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1.326     albertel 1462: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1463: 	}
                   1464:     } elsif ($target eq 'tex') {
1.326     albertel 1465: 	&Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1466:     }
                   1467:     return '';
1.24      albertel 1468: }
                   1469: 
1.25      albertel 1470: sub end_postanswerdate {
1.159     albertel 1471:     return '';
1.24      albertel 1472: }
                   1473: 
1.25      albertel 1474: sub start_notsolved {
1.326     albertel 1475:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1476:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1477: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1478: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1479: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1480: 	if ($gradestatus =~ /^correct/ &&
                   1481: 	    &Apache::response::show_answer()) {
1.159     albertel 1482: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1483: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1484: 	}
1.24      albertel 1485:     }
1.159     albertel 1486:     return '';
1.24      albertel 1487: }
                   1488: 
1.25      albertel 1489: sub end_notsolved {
1.159     albertel 1490:     return '';
1.24      albertel 1491: }
                   1492: 
                   1493: sub start_solved {
1.326     albertel 1494:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1495:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1496: 	$target eq 'tex') {
                   1497: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1498: 	if ($gradestatus !~ /^correct/ ||
                   1499: 	    !&Apache::response::show_answer()) {
1.326     albertel 1500: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1501: 	}
1.24      albertel 1502:     }
1.159     albertel 1503:     return '';
1.24      albertel 1504: }
                   1505: 
                   1506: sub end_solved {
1.248     albertel 1507:     return '';
                   1508: }
                   1509: 
                   1510: sub start_problemtype {
1.326     albertel 1511:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1512:     my $result;
1.339     albertel 1513:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1514: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1515: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1516: 	if (!defined($mode)) { $mode='show'; }
                   1517: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1518: 	my $found=0;
                   1519: 	foreach my $type (split(',',$for)) {
                   1520: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1521: 	}
                   1522: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1523: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1524: 	}
                   1525: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1526: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1527: 	}
                   1528:     } elsif ($target eq 'edit') {
                   1529: 	$result .=&Apache::edit::tag_start($target,$token);
                   1530: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1531: 					   [['show','Show'],
                   1532: 					    ['hide','Hide']]
                   1533: 					   ,$token);
                   1534: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1535: 					     [ ['exam','Exam/Quiz Problem'],
                   1536: 					       ['survey','Survey'],
                   1537: 					       ['problem','Homework Problem'] ]
                   1538: 					     ,$token);
                   1539: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1540:     } elsif ($target eq 'modified') {
                   1541: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1542: 						     $safeeval,'mode','for');
                   1543: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1544:     }
                   1545:     return $result;
                   1546: }
                   1547: 
                   1548: sub end_problemtype {
1.159     albertel 1549:     return '';
1.24      albertel 1550: }
1.34      albertel 1551: 
                   1552: sub start_startouttext {
1.159     albertel 1553:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1554:     my @result=(''.'');
                   1555:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1556:     return (@result);
1.34      albertel 1557: }
1.159     albertel 1558: 
1.34      albertel 1559: sub end_startouttext {
1.326     albertel 1560:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1561:     my $result='';
                   1562:     my $text='';
                   1563: 
                   1564:     if ($target eq 'edit') {
1.326     albertel 1565: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.211     albertel 1566: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1567: <td>".&mt('Delete:').
1.159     albertel 1568:                  &Apache::edit::deletelist($target,$token)
                   1569: 		 ."</td>
1.42      albertel 1570: <td>".
1.159     albertel 1571:                  &Apache::edit::insertlist($target,$token).
                   1572: 		 &Apache::edit::end_row().
                   1573:                  &Apache::edit::start_spanning_row()."\n"
1.188     bowersj2 1574: 		 . &Apache::loncommon::helpLatexCheatsheet () .
1.255     www      1575: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1576:     }
                   1577:     if ($target eq 'modified') {
1.219     albertel 1578: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1579:     }
                   1580:     if ($target eq 'tex') {
                   1581: 	$result .= '\noindent ';
                   1582:     }
                   1583:     return $result;
1.34      albertel 1584: }
1.159     albertel 1585: 
1.34      albertel 1586: sub start_endouttext {
1.159     albertel 1587:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1588:     my $result='';
                   1589:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1590:     if ($target eq "modified") {
                   1591: 	$result='<endouttext />'.
                   1592: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1593:     return $result;
1.34      albertel 1594: }
1.159     albertel 1595: 
1.34      albertel 1596: sub end_endouttext {
1.159     albertel 1597:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1598:     my @result=('','');
                   1599:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1600:     return (@result);
1.34      albertel 1601: }
1.159     albertel 1602: 
1.45      albertel 1603: sub delete_startouttext {
1.326     albertel 1604:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1605:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 1606:     my $text=$$parser['-1']->get_text("/endouttext");
                   1607:     my $ntoken=$$parser['-1']->get_token();
                   1608:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1609:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1610:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1611:     # they did the last time round
                   1612:     &Apache::lonxml::increasedepth($ntoken);
                   1613:     &Apache::lonxml::decreasedepth($ntoken);
                   1614:     return 1;
1.193     www      1615: }
                   1616: 
                   1617: sub start_simpleeditbutton {
                   1618:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1619:     my $result='';
1.284     albertel 1620:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 1621: 	($target eq 'web') &&
1.330     albertel 1622:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 1623:         my $url=$env{'request.noversionuri'};
1.193     www      1624:         $url=~s/\?.*$//;
1.278     albertel 1625: 	my ($symb) = &Apache::lonxml::whichuser();
1.194     www      1626: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.278     albertel 1627:                 '<a href="'.$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      1628: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1629:     }
                   1630:     return $result;
                   1631: }
                   1632: 
                   1633: sub end_simpleeditbutton {
                   1634:     return '';
1.45      albertel 1635: }
1.34      albertel 1636: 
1.1       albertel 1637: 1;
                   1638: __END__

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