Annotation of loncom/homework/structuretags.pm, revision 1.368

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.368   ! albertel    4: # $Id: structuretags.pm,v 1.367 2006/10/17 15:11:12 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 );
1.356     www        41: use lib '/home/httpd/lib/perl/';
                     42: use LONCAPA;
                     43:  
1.78      harris41   44: BEGIN {
1.248     albertel   45:     &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   46: }
                     47: 
                     48: sub start_web {
1.326     albertel   49:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                     50:     my $bodytext=&Apache::lonxml::get_all_text("/web",$parser,$style);
1.339     albertel   51:     if ($target eq 'web' || $target eq 'webgrade') {
1.200     albertel   52: 	return $bodytext;
1.159     albertel   53:     }
                     54:     return '';
1.10      albertel   55: }
                     56: 
                     57: sub end_web {
1.44      ng         58:     return '';
1.10      albertel   59: }
                     60: 
                     61: sub start_tex {
1.326     albertel   62:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.198     sakharuk   63:     my $result='';
1.326     albertel   64:     my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
1.200     albertel   65:     if ($target eq 'tex') {
                     66: 	return $bodytext.' ';
1.159     albertel   67:     }
1.198     sakharuk   68:     return $result;;
1.10      albertel   69: }
                     70: 
                     71: sub end_tex {
1.44      ng         72:     return '';
1.9       albertel   73: }
                     74: 
1.48      albertel   75: sub page_start {
1.345     albertel   76:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
                     77: 	$extra_head)=@_;
1.159     albertel   78:     my %found;
1.207     albertel   79:     foreach my $taginside (@$tagstack) {
1.159     albertel   80: 	foreach my $taglookedfor ('html','body','form') {
                     81: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                     82: 	}
                     83:     }
                     84: 
1.343     albertel   85:     if ($target eq 'tex') {
                     86: 	return
                     87: 	    &Apache::londefdef::start_html($target,$token,$tagstack,
                     88: 					   $parstack,$parser,$safeeval);
                     89:     }
                     90: 
1.344     albertel   91:     my %body_args;
                     92:     if (defined($found{'html'})) {
                     93: 	$body_args{'skip_phases'}{'head'}=1;
                     94:     } else {
1.343     albertel   95: 	
1.345     albertel   96: 	$extra_head .= &Apache::lonhtmlcommon::spellheader();
1.343     albertel   97: 
1.336     albertel   98: 	my $css_href = &Apache::lonnet::EXT('resource.0.cssfile');
1.335     albertel   99: 	if ($css_href =~ /\S/) {
                    100: 	    &Apache::lonxml::extlink($css_href);
1.343     albertel  101: 	    $extra_head .= 
1.335     albertel  102: 		'<link rel="stylesheet" type="text/css" href="'.$css_href.'" />';
                    103: 	}
1.327     albertel  104: 	if ($target eq 'edit') {
1.343     albertel  105: 	    $extra_head.=&Apache::edit::js_change_detection().
                    106: 		"<script type=\"text/javascript\">\n".
                    107: 		"if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
                    108: 		&Apache::loncommon::browser_and_searcher_javascript().
                    109:                 "\n</script>\n";
                    110: 	}
1.159     albertel  111:     }
1.343     albertel  112: 
1.344     albertel  113:     if (defined($found{'body'})) {
                    114: 	$body_args{'skip_phases'}{'body'}=1;
                    115:     } elsif (!defined($found{'body'}) 
                    116: 	     && $env{'request.state'} eq 'construct') {
1.343     albertel  117: 	if ($target eq 'web' || $target eq 'edit') {
1.344     albertel  118: 	    # no extra args to bodytag
1.297     albertel  119: 	}
1.272     albertel  120:     } elsif (!defined($found{'body'})) {
1.343     albertel  121: 	my %add_entries;
1.159     albertel  122: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    123: 						  $safeeval);
1.343     albertel  124: 	if ($background ne '' ) {
                    125: 	    $add_entries{'background'} = $background;
                    126: 	}
1.344     albertel  127: 
1.290     albertel  128: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    129: 					       $safeeval);
1.344     albertel  130:        	if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
                    131: 
                    132: 	$body_args{'bgcolor'}        = $bgcolor;
                    133: 	$body_args{'no_title'}       = 1;
                    134: 	$body_args{'force_register'} = 1;
                    135: 	$body_args{'add_entries'}    = \%add_entries;	
                    136:     }
1.365     albertel  137:     $body_args{'no_auto_mt_title'} = 1;
1.344     albertel  138:     my $page_start = &Apache::loncommon::start_page($name,$extra_head,
                    139: 						    \%body_args);
                    140: 
                    141:     if (!defined($found{'body'}) 
                    142: 	&& $env{'request.state'} ne 'construct'
                    143: 	&& ($target eq 'web' || $target eq 'webgrade')) {
                    144: 
1.367     albertel  145: 	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
1.344     albertel  146: 	if ($symb eq '' && !$publicuser) {
                    147: 	    my $help = &Apache::loncommon::help_open_topic("Ambiguous_Reference");
                    148: 	    $help=&mt("Browsing resource, all submissions are temporary.")."<br />";
                    149: 	    $page_start .= $help;
1.159     albertel  150: 	}
1.344     albertel  151:     }
                    152: 
                    153:     if (!defined($found{'body'})) {
1.343     albertel  154: 	$page_start .= &Apache::lonxml::message_location();
1.159     albertel  155:     }
1.344     albertel  156:     
1.159     albertel  157:     my $form_tag_start;
                    158:     if (!defined($found{'form'})) {
1.337     albertel  159: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
1.338     albertel  160: 	my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.327     albertel  161: 	$form_tag_start.=$uri.'" ';
                    162: 	if ($target eq 'edit') {
                    163: 	    $form_tag_start.=&Apache::edit::form_change_detection();
                    164: 	}
1.368   ! albertel  165: 	$form_tag_start.='>'."\n";
1.355     albertel  166: 
                    167: 	my $symb=&Apache::lonnet::symbread();
                    168: 	if ($symb =~ /\S/) {
                    169: 	    $symb=
                    170: 		&HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
                    171: 	    $form_tag_start.=
1.368   ! albertel  172: 		"\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
1.355     albertel  173: 	}
1.159     albertel  174:     }
1.343     albertel  175:     return ($page_start,$form_tag_start);
1.105     albertel  176: }
                    177: 
1.141     matthew   178: #use Time::HiRes();
1.105     albertel  179: sub get_resource_name {
1.159     albertel  180:     my ($parstack,$safeeval)=@_;
1.204     albertel  181:     if (defined($Apache::lonhomework::name)) {
                    182: 	return $Apache::lonhomework::name;
                    183:     }
1.367     albertel  184:     my ($symb)=&Apache::lonnet::whichuser();
1.279     albertel  185:     my $name=&Apache::lonnet::gettitle($symb);
1.159     albertel  186:     if ($name eq '') {
                    187: 	$name=&Apache::lonnet::EXT('resource.title');
                    188: 	if ($name eq 'con_lost') { $name = ''; }
                    189:     }
1.204     albertel  190:     if ($name!~/\S+/) {
1.284     albertel  191: 	$name=$env{'request.uri'};
1.205     albertel  192: 	$name=~s-.*/([^/]+)$-$1-;
1.204     albertel  193:     }
1.159     albertel  194:     $Apache::lonhomework::name=$name;
                    195:     return $name;
1.105     albertel  196: }
                    197: 
                    198: sub setup_rndseed {
1.159     albertel  199:     my ($safeeval)=@_;
                    200:     my $rndseed;
1.367     albertel  201:     my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  202:     if ($env{'request.state'} eq "construct" 
                    203: 	|| $symb eq '' 
                    204: 	|| $Apache::lonhomework::type eq 'practice'
                    205: 	|| $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       206: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  207: 						['rndseed']);
1.284     albertel  208: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  209: 	if (!$rndseed) {
1.162     albertel  210: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    211: 	    if (!$rndseed) {
                    212: 		$rndseed=time;
                    213: 	    }
1.284     albertel  214: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  215: 	}
1.284     albertel  216: 	if ($env{'form.resetdata'} eq &mt('New Problem Variation') ||
                    217: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  218: 	    srand(time);
                    219: 	    $rndseed=int(rand(2100000000));
1.284     albertel  220: 	    $env{'form.rndseed'}=$rndseed;
                    221: 	    delete($env{'form.resetdata'});
                    222: 	    delete($env{'form.newrandomization'});
1.159     albertel  223: 	}
1.187     albertel  224: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
1.307     albertel  225: 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
1.187     albertel  226:         }
1.247     albertel  227:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    228: 	   $rndseed=&Apache::lonnet::rndseed();
                    229: 	}
1.221     albertel  230: 	if ($safeeval) {
                    231: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  232: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  233: 	}
1.159     albertel  234:     }
                    235:     return $rndseed;
1.105     albertel  236: }
                    237: 
1.268     albertel  238: sub remember_problem_state {
                    239:     return '
1.284     albertel  240:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    241:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    242:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  243: }
                    244: 
1.105     albertel  245: sub problem_edit_header {
1.268     albertel  246:     return '<input type="hidden" name="submitted" value="edit" />'.
                    247: 	&Apache::structuretags::remember_problem_state().'
1.210     albertel  248:        <input type="hidden" name="problemmode" value="'.&mt('Edit').'" />
1.243     matthew   249:        <input type="submit" name="problemmode" accesskey="d" value="'.&mt('Discard Edits and View').'" />
1.328     albertel  250:        <input '.&Apache::edit::submit_ask_anyway().' type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
1.243     matthew   251:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" /> <hr />
                    252:        <input type="submit" name="submit" accesskey="s" value="'.&mt('Submit Changes and Edit').'" />
                    253:        <input type="submit" name="submit" accesskey="v" value="'.&mt('Submit Changes and View').'" /><table><tr><td>'.
1.359     albertel  254:        &Apache::loncommon::help_open_menu('Problem Editing Help','Problem_Editor_XML_Index',5,'Authoring',undef,undef,undef,'Problem Editing Help')
1.260     albertel  255:        .'</td></tr></table>'.
1.282     albertel  256:        '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  257: }
                    258: 
                    259: sub problem_edit_footer {
1.210     albertel  260:     return '</td></tr></table><br /><input type="submit" name="submit" value="'.&mt('Submit Changes and Edit').'" />
1.255     www       261:     <input type="submit" name="submit" value="'.&mt('Submit Changes and View').'" />'.
1.348     albertel  262:     &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields()).
1.342     albertel  263:     "\n</form>\n".&Apache::loncommon::end_page();
1.105     albertel  264: }
                    265: 
1.235     albertel  266: sub option {
                    267:     my ($value,$name) = @_;
                    268:     my $result ="<option value='".$value."' ";
1.284     albertel  269:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  270: 	$result.=" selected='on' ";
                    271:     }
                    272:     $result.='>';
                    273:     return $result;
                    274: }
                    275: 
1.105     albertel  276: sub problem_web_to_edit_header {
1.159     albertel  277:     my ($rndseed)=@_;
1.313     albertel  278:     my $result.='<input type="hidden" name="problemmode" value="'.&mt('View').'" />';
                    279:     if (!$Apache::lonhomework::parsing_a_task) {
                    280: 	$result .= '<input type="submit" name="problemmode" accesskey="e" value="'.&mt('Edit').'" />';
                    281:     }
                    282:     $result .= '<input type="submit" name="problemmode" accesskey="x" value="'.&mt('EditXML').'" />
1.243     matthew   283:              <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    284:              <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
1.210     albertel  285:              <nobr><input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
1.270     albertel  286:               <input type="text" name="rndseed" size="10" value="'.
1.175     albertel  287: 	       $rndseed.'"
1.270     albertel  288:            onchange="javascript:document.lonhomework.changerandseed.click()" /></nobr>
1.281     albertel  289:              <label><input type="checkbox" name="showallfoils" ';
1.315     albertel  290:     my $show_all_foils_text = 
                    291: 	($Apache::lonhomework::parsing_a_task) ?
                    292: 	&mt('&nbsp;Show&nbsp;All&nbsp;Instances')
                    293: 	: &mt('&nbsp;Show&nbsp;All&nbsp;Foils');
                    294: 
1.284     albertel  295:     if (defined($env{'form.showallfoils'})) { $result.='checked="on"'; }
1.315     albertel  296:     $result.= ' />'.$show_all_foils_text.
1.228     www       297: 	&Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area','Testing Problems').
1.281     albertel  298: 	'</label><hr />';
1.313     albertel  299:     if (!$Apache::lonhomework::parsing_a_task) {
                    300: 	$result.="
1.235     albertel  301: <nobr>
                    302: Problem Status:
                    303: <select name='problemstate'>
1.270     albertel  304:   <option value=''></option>
1.235     albertel  305:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    306:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    307:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    308:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    309:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    310: </select>
                    311: </nobr>
                    312: <nobr>
                    313: Problem Type:
                    314: <select name='problemtype'>
1.270     albertel  315:   <option value=''></option>
1.242     albertel  316:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
                    317:   ".&option('problem','problemtype').&mt("Homework problem")."</option>
                    318:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.235     albertel  319: </select>
                    320: </nobr>
                    321: <nobr>
                    322: Feedback Mode:
                    323: <select name='problemstatus'>
                    324:   <option value=''></option>
1.242     albertel  325:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
                    326:   ".&option('no', 'problemstatus').&mt("Don't Show Feedback")."</option>
1.235     albertel  327: </select>
                    328: </nobr>
1.242     albertel  329: <input type='submit' name='changeproblemmode' value='".&mt("Change")."' />
1.235     albertel  330: <hr />";
1.313     albertel  331: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    332: 	if (!$numtoanalyze) { $numtoanalyze=20; }
                    333: 	$result.= '<input type="submit" name="problemmode" value='.
                    334: 	    &mt('"Calculate answers').'" /> for
1.136     albertel  335:              <input type="text" name="numtoanalyze" value="'.
1.210     albertel  336: 	     $numtoanalyze.'" size="5" /> '.&mt('versions of this problem').
                    337: 	     '.'.&Apache::loncommon::help_open_topic("Analyze_Problem",
1.176     albertel  338: 						     '',undef,undef,300).
1.210     albertel  339: 						     '<hr />';
1.313     albertel  340:     }
1.159     albertel  341:     return $result;
1.48      albertel  342: }
                    343: 
1.65      albertel  344: sub initialize_storage {
1.357     albertel  345:     my ($given_symb) = @_;
1.353     albertel  346:     undef(%Apache::lonhomework::results);
                    347:     undef(%Apache::lonhomework::history);
1.357     albertel  348:     my ($symb,$courseid,$domain,$name) = 
1.367     albertel  349: 	&Apache::lonnet::whichuser($given_symb);
1.353     albertel  350:     
                    351:     # anonymous users (CODEd exams) have no data
                    352:     if ($name eq 'anonymous' 
                    353: 	&& !defined($domain)) {
                    354: 	return;
                    355:     }
                    356: 
1.333     albertel  357:     if ($env{'request.state'} eq 'construct' 
                    358: 	|| $symb eq ''
                    359: 	|| $Apache::lonhomework::type eq 'practice') {
                    360: 	
                    361: 	my $namespace = $symb || $env{'request.uri'};
                    362: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
                    363: 	    $env{'form.resetdata'} eq &mt('New Problem Variation') ||
                    364: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    365: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    366: 	    &Apache::lonxml::debug("Attempt reset");
                    367: 	}
1.159     albertel  368: 	%Apache::lonhomework::history=
1.333     albertel  369: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  370: 	my ($temp)=keys %Apache::lonhomework::history ;
                    371: 	&Apache::lonxml::debug("Return message of $temp");
                    372:     } else {
                    373: 	%Apache::lonhomework::history=
                    374: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    375:     }
1.353     albertel  376: 
1.159     albertel  377:     #ignore error conditions
1.67      albertel  378:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  379:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  380: }
                    381: 
                    382: # -------------------------------------------------------------finalize_storage
                    383: # Stores away the result has to a student's environment
                    384: # checks form.grade_ for specific values, other wises stores
                    385: # to the running users environment
1.285     raeburn   386: # Will increment totals for attempts, students, and corrects
                    387: # if running user has student role.  
1.65      albertel  388: sub finalize_storage {
1.357     albertel  389:     my ($given_symb) = @_;
1.159     albertel  390:     my $result;
1.289     albertel  391:     if (%Apache::lonhomework::results) {
1.323     albertel  392: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    393: 	delete(@Apache::lonhomework::results{@remove});
1.357     albertel  394: 	my ($symb,$courseid,$domain,$name) = 
1.367     albertel  395: 	    &Apache::lonnet::whichuser($given_symb);
1.333     albertel  396: 	if ($env{'request.state'} eq 'construct' 
                    397: 	    || $symb eq ''
                    398: 	    || $Apache::lonhomework::type eq 'practice') {
                    399: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  400: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  401: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  402: 					      $namespace,'',$domain,$name);
1.159     albertel  403: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    404: 	} else {
                    405: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    406: 					    $symb,$courseid,$domain,$name);
                    407: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   408:             if ($env{'request.role'} =~/^st/) {
                    409:                 &store_aggregates($symb,$courseid);
                    410:             }
1.159     albertel  411: 	}
1.323     albertel  412:     } else {
                    413: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  414:     }
1.159     albertel  415:     return $result;
1.65      albertel  416: }
1.289     albertel  417: use Data::Dumper;
1.65      albertel  418: 
1.285     raeburn   419: # -------------------------------------------------------------store_aggregates
                    420: # Sends hash of values to be incremented in nohist_resourcetracker.db
                    421: # for the course. Increments total number of attempts, unique students 
                    422: # and corrects for each part for an instance of a problem, as appropriate.
                    423: sub store_aggregates {
                    424:     my ($symb,$courseid) = @_;
1.286     albertel  425:     my %aggregate;
                    426:     my @parts;
1.288     albertel  427:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    428:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  429:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  430:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  431:             push(@parts, $1);
1.285     raeburn   432:         }
                    433:     }
1.286     albertel  434:     foreach my $part (@parts) {
                    435:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    436: 	    eq 'APPROX_ANS' ||
                    437: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    438: 	    eq 'EXACT_ANS') {
1.287     albertel  439:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   440:         }
1.286     albertel  441:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  442:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   443:         } else {
1.293     albertel  444:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   445:             if ($last_reset) {
1.293     albertel  446:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   447:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    448:                 }
                    449:             }
1.285     raeburn   450:         }
1.287     albertel  451:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   452:     }
1.292     raeburn   453:     if (keys (%aggregate) > 0) {
1.289     albertel  454: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   455:                             $cdomain,$cname);
                    456:     }
                    457: }
1.289     albertel  458: 
1.65      albertel  459: sub checkout_msg {
1.211     albertel  460:     my %lt=&Apache::lonlocal::texthash( 
                    461: 		'resource'=>'The resource needs to be checked out',
                    462: 		'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.',
                    463:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    464:                 'checkout'=>'Check out Exam for Viewing',
                    465: 		'checkout?'=>'Check out Exam?');
1.352     albertel  466:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.159     albertel  467:     return (<<ENDCHECKOUT);
1.211     albertel  468: <h2>$lt{'resource'}</h2>
                    469:     <p>$lt{'id_expln'}</p>
                    470: <font color="red">
                    471: <p>$lt{'warning'}</p>
1.91      albertel  472: </font>
1.352     albertel  473: <form name="checkout" method="POST" action="$uri">
1.91      albertel  474: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  475: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  476: </form>
                    477: ENDCHECKOUT
                    478: }
                    479: 
1.252     albertel  480: sub firstaccess_msg {
1.253     albertel  481:     my ($time,$symb)=@_;
                    482:     my ($map)=&Apache::lonnet::decode_symb($symb);
                    483:     my $foldertitle=&Apache::lonnet::gettitle($map);
                    484:     &Apache::lonxml::debug("map is $map title is $foldertitle");
1.352     albertel  485:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.252     albertel  486:     return (<<ENDCHECKOUT);
1.253     albertel  487: <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  488: <form name="markaccess" method="POST" action="$uri">
1.252     albertel  489: <input type="hidden" name="markaccess" value="yes" />
                    490: <input type="button" name="accessbutton" value="Show Resource" onClick="javascript:if (confirm('Start Timer?')) { document.markaccess.submit(); }" />
                    491: </form>
                    492: ENDCHECKOUT
                    493: }
                    494: 
1.204     albertel  495: sub init_problem_globals {
                    496:     my ($type)=@_;
                    497:     #initialize globals
1.308     foxr      498:     #   For problems, we start out in part 0 (outside a <part> tag).
                    499:     #   and part 0 is used to describe the main body of the <problem>
                    500:     #
1.204     albertel  501:     if ($type eq 'problem') {
                    502: 	$Apache::inputtags::part='0';
                    503: 	@Apache::inputtags::partlist=('0');
1.266     albertel  504: 	$Apache::lonhomework::problemstatus=&get_problem_status('0');
                    505: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      506: 
1.266     albertel  507:     } elsif ($type eq 'library') {
1.204     albertel  508: 	$Apache::inputtags::part='';
                    509: 	@Apache::inputtags::partlist=();
                    510: 	$Apache::lonhomework::problemstatus='';	
1.266     albertel  511: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      512: 
1.304     albertel  513:     } elsif ($type eq 'Task') {
                    514: 	$Apache::inputtags::part='0';
                    515: 	@Apache::inputtags::partlist=('0');
                    516: 	$Apache::lonhomework::problemstatus='';	
                    517: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  518:     }
                    519:     @Apache::inputtags::responselist = ();
                    520:     @Apache::inputtags::importlist = ();
                    521:     @Apache::inputtags::previous=();
                    522:     @Apache::inputtags::previous_version=();
                    523:     $Apache::structuretags::printanswer='No';
                    524:     @Apache::structuretags::whileconds=();
                    525:     @Apache::structuretags::whilebody=();
                    526:     @Apache::structuretags::whileline=();
                    527:     $Apache::lonhomework::scantronmode=0;
                    528:     undef($Apache::lonhomework::name);
1.358     albertel  529:     undef($Apache::lonhomework::default_type);
                    530:     undef($Apache::lonhomework::type);
1.204     albertel  531: }
                    532: 
                    533: sub reset_problem_globals {
                    534:     my ($type)=@_;
                    535:     undef(%Apache::lonhomework::history);
                    536:     undef(%Apache::lonhomework::results);
                    537:     undef($Apache::inputtags::part);
1.208     albertel  538: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    539: #detect if we try to do 2 problems in one file
                    540: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  541:     undef($Apache::lonhomework::name);
1.358     albertel  542:     undef($Apache::lonhomework::default_type);
                    543:     undef($Apache::lonhomework::type);
                    544:     undef($Apache::lonhomework::scantronmode);
                    545:     undef($Apache::lonhomework::problemstatus);
                    546:     undef($Apache::lonhomework::ignore_response_errors);
1.204     albertel  547: }
                    548: 
1.241     albertel  549: sub set_problem_state {
1.240     albertel  550:     my ($part)=@_;
1.284     albertel  551:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  552: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    553: 	    'correct_by_student';
                    554:     }
                    555: }
                    556: 
1.241     albertel  557: sub get_problem_status {
                    558:     my ($part)=@_;
1.267     albertel  559:     my $problem_status;
1.284     albertel  560:     if ($env{'request.state'} eq 'construct' &&
                    561: 	defined($env{'form.problemstatus'})) {
                    562: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  563:     } else {
                    564: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    565: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  566: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  567:     }
                    568:     return $problem_status;
                    569: }
                    570: 
1.9       albertel  571: sub start_problem {
1.326     albertel  572:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel  573: 
1.311     foxr      574:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  575:     if (!$Apache::lonxml::metamode) {
                    576: 	&Apache::lonxml::startredirection();
                    577:     }
1.311     foxr      578: 
1.308     foxr      579:     # Problems don't nest and we don't allow more than one <problem> in
                    580:     # a .problem file.
                    581:     #
1.184     albertel  582:     if ( $Apache::inputtags::part ne '' ||
                    583: 	 $Apache::lonhomework::parsing_a_problem) {
                    584: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel  585: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel  586: 	return '';
                    587:     }
1.184     albertel  588: 
                    589:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  590:     &init_problem_globals('problem');
1.166     albertel  591: 
1.284     albertel  592:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  593: 	$Apache::lonhomework::scantronmode=1;
                    594:     }
1.161     albertel  595: 
1.159     albertel  596:     if ($target ne 'analyze') {
1.284     albertel  597:        	if ($env{'request.state'} eq 'construct') { &set_problem_state('0'); }
1.159     albertel  598: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.284     albertel  599: 	if (($env{'request.state'} eq 'construct') &&
                    600: 	    defined($env{'form.problemtype'})) {
                    601: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  602: 	}
1.332     albertel  603: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  604:     }
1.164     albertel  605:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  606: 	my $uri=$env{'request.uri'};
1.159     albertel  607: 	if ($uri=~/\.(\w+)$/) {
                    608: 	    $Apache::lonhomework::type=$1;
                    609: 	    &Apache::lonxml::debug("Using type of $1");
                    610: 	} else {
                    611: 	    $Apache::lonhomework::type='problem';
                    612: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    613: 	}
1.87      albertel  614:     }
1.301     albertel  615:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       616: 
1.363     albertel  617:     &initialize_storage();
1.366     albertel  618:     if ($target eq 'web') {
                    619: 	&Apache::lonxml::debug(" grading history ");
                    620: 	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
                    621:     }
1.363     albertel  622: 
1.159     albertel  623:     #added vars to the scripting enviroment
1.213     albertel  624:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  625:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  626:     &Apache::run::run($expression,$safeeval);
1.159     albertel  627:     my $status;
                    628:     my $accessmsg;
                    629: 
1.343     albertel  630:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel  631:     my ($result,$form_tag_start);
1.354     albertel  632:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
                    633: 	|| $target eq 'edit') {
1.350     albertel  634: 	($result,$form_tag_start) =
                    635: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    636: 			$name);
                    637:     }
                    638: 
1.284     albertel  639:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  640: 
                    641:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    642:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    643: 	$target eq 'tex') {
                    644: 	#handle exam checkout
                    645: 	if ($Apache::lonhomework::type eq 'exam') {
                    646: 	    my $token=
                    647: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  648: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  649: 		$token=&Apache::lonxml::maketoken();
                    650: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    651: 		    $token;
                    652: 	    }
1.343     albertel  653: 	    $result.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  654: 	}
1.284     albertel  655: 	if ($env{'form.markaccess'}) {
1.252     albertel  656: 	    &Apache::lonnet::set_first_access('map');
                    657: 	}
1.159     albertel  658: 	#handle rand seed in construction space
                    659: 	my $rndseed=&setup_rndseed($safeeval);
1.367     albertel  660: 	my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  661: 	if ($env{'request.state'} ne "construct" && 
                    662: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  663: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    664: 		$rndseed.'" />'.
                    665: 		    '<input type="submit" name="resetdata"
1.334     albertel  666:                              value="'.&mt('New Problem Variation').'" />';
                    667: 	    if (exists($env{'form.username'})) {
                    668: 		$form_tag_start.=
1.164     albertel  669: 		    '<input type="hidden" name="username"
1.284     albertel  670:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  671: 	    }
1.333     albertel  672: 	    if ($env{'request.role.adv'}) {
1.267     albertel  673: 		$form_tag_start.=
1.300     albertel  674: 		    ' <label><input type="checkbox" name="showallfoils" ';
1.284     albertel  675: 		if (defined($env{'form.showallfoils'})) {
1.267     albertel  676: 		    $form_tag_start.='checked="on"';
                    677: 		}
1.300     albertel  678: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    679: 		    '</label>';
1.267     albertel  680: 	    }
                    681: 	    $form_tag_start.='<hr />';
1.162     albertel  682: 	}
1.324     albertel  683: 
                    684: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    685: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  686: 	push (@Apache::inputtags::status,$status);
1.324     albertel  687: 
1.159     albertel  688: 	my $expression='$external::datestatus="'.$status.'";';
                    689: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    690: 	&Apache::run::run($expression,$safeeval);
                    691: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  692: 
1.159     albertel  693: 	if (( $status eq 'CLOSED' ) ||
                    694: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  695: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  696: 	    ( $status eq 'BANNED') ||
1.216     albertel  697: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  698: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  699: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  700: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    701: 						       $style);
1.159     albertel  702: 	    if ( $target eq "web" ) {
1.343     albertel  703: 		my $msg;
1.159     albertel  704: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  705: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  706: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  707: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  708: 		}
1.216     albertel  709: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.159     albertel  710: 		    $msg.='The problem '.$accessmsg;
                    711: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel  712: 		    $msg.=&checkout_msg();
1.252     albertel  713: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  714: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  715: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
                    716: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work.");
1.159     albertel  717: 		}
                    718: 		$result.=$msg.'<br />';
                    719: 	    } elsif ($target eq 'tex') {
1.332     albertel  720: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    721: 		                    : '\begin{minipage}{\textwidth}';
                    722: 		$result.='\begin{document}\noindent \vskip 1 mm '.
                    723: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  724: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  725: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  726: 		} else {
1.211     albertel  727: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  728: 		}
                    729: 	    }
1.324     albertel  730: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  731: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    732: 						       $style);
1.324     albertel  733: 	    if ($target eq 'web') {
                    734: 		$result .= &Apache::bridgetask::proctor_validation_screen();
                    735: 	    } elsif ($target eq 'grade') {
                    736: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                    737: 							'problem');
                    738: 	    }
1.159     albertel  739: 	} elsif ($target eq 'web') {
1.360     albertel  740: 	    if ($status eq 'CAN_ANSWER' 
                    741: 		&& $slot_name ne ''
                    742: 		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
                    743: 		# unproctored slot access, self checkin
                    744: 		&Apache::bridgetask::check_in('problem',undef,undef,
                    745: 					      $slot_name);
                    746: 	    }
1.368   ! albertel  747: 	    $result.="\n $form_tag_start \t".	
1.227     albertel  748: 	      '<input type="hidden" name="submitted" value="yes" />';
                    749: 	    # create a page header and exit
1.284     albertel  750: 	    if ($env{'request.state'} eq "construct") {
                    751: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.227     albertel  752: 	    }
                    753: 	    # if we are viewing someone else preserve that info
1.284     albertel  754: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel  755: 		foreach my $field ('symb','courseid','domain','username') {
                    756: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel  757: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel  758: 		}
                    759: 	    }
                    760: 	} elsif ($target eq 'tex') {
1.319     foxr      761: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                    762: 
1.99      sakharuk  763: 	}
1.159     albertel  764:     } elsif ($target eq 'edit') {
1.343     albertel  765: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel  766: 	$Apache::lonxml::warnings_error_header=
                    767: 	    &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  768: 	my $temp=&Apache::edit::insertlist($target,$token);
                    769: 	$result.=$temp;
                    770:     } elsif ($target eq 'modified') {
                    771: 	$result=$token->[4];
                    772: 	$result.=&Apache::edit::handle_insert();
                    773:     } else {
                    774: 	# page_start returned a starting result, delete it if we don't need it
                    775: 	$result = '';
1.99      sakharuk  776:     }
1.159     albertel  777:     return $result;
1.9       albertel  778: }
                    779: 
                    780: sub end_problem {
1.159     albertel  781:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel  782:     my $result;
1.310     foxr      783: 
1.321     albertel  784:     if (!$Apache::lonxml::metamode) {
                    785: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel  786: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel  787:     }
1.319     foxr      788: 
                    789:     if ($target eq 'tex') {
1.321     albertel  790: 
                    791: 	# Figure out the front matter and replace the
                    792: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                    793: 	# this in end_problem because whether or not we display due
                    794: 	# dates depends on whether due dates have already been
                    795: 	# displayed in the problem parts.
                    796: 
1.319     foxr      797: 	my $frontmatter   = '';
                    798: 	my $startminipage = '';
                    799: 	if (not $env{'form.problem_split'}=~/yes/) {
                    800: 	    $startminipage = '\begin{minipage}{\textwidth}';
                    801: 	}
                    802: 	my $id = $Apache::inputtags::part;
                    803: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                    804: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                    805: 	my @packages = split /,/,$packages;
                    806: 	my $allow_print_points = 0;
                    807: 	foreach my $partial_key (@packages) {
                    808: 	    if ($partial_key=~m/^part_0$/) {
                    809: 		$allow_print_points=1;
                    810: 	    }
                    811: 	}
                    812: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    813: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                    814: 	if (lc($env{'course.'.$env{'request.course.id'}.
                    815: 			'.disableexampointprint'}) eq 'yes') {
                    816: 	    $allow_print_points=0;
                    817: 	}
                    818: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
                    819: 	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 ';
                    820: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                    821: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                    822: 	
                    823: 	#  Figure out what the due date is and if we need to print
                    824: 	#  it in the problem header.  We have been logging the
                    825: 	#  last due date written to file. 
                    826: 	
                    827: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    828: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
                    829: 	my $temp_file;
                    830: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                    831: 	
                    832: 	# Figure out what the last printed due date is or set it
                    833: 	# to the epoch if no duedates have been printed.
                    834: 	
                    835: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                    836: 	if (-e $filename) {
                    837: 	    $temp_file = Apache::File->new($filename);
                    838: 	    my @due_file      = <$temp_file>;
                    839: 	    $due_file_content = $due_file[$#due_file];
                    840: 	    chomp $due_file_content;
                    841: 	} 
                    842: 	
                    843: 	# We display the due date iff it is not the same as the last
                    844: 	# duedate in problem header ($due_file_content), and
                    845: 	# none of our parts displayed a duedate.
                    846: 	#
                    847: 	my $parts_with_displayduedate;
                    848: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                    849: 	    $parts_with_displayduedate = 
                    850: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                    851: 	} else {
                    852: 	    $parts_with_displayduedate = 0;
                    853: 	}
                    854: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                    855: 	    $temp_file = Apache::File->new('>'.$filename);
                    856: 	    print $temp_file "$duetime\n";
                    857: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    858: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                    859: 		    $frontmatter .= $begin_doc.
                    860: 			'\textit{Due date: '.$duedate.'} '.$toc_line;
                    861: 		} else {
                    862: 		    $frontmatter.= $begin_doc.$toc_line;
                    863: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    864: 		}
                    865: 	    } else {
                    866: 		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
                    867: 	    }
                    868: 	} else {
                    869: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    870: 		$frontmatter .= $begin_doc.$toc_line;
                    871: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    872: 	    } else {
                    873: 		$frontmatter .= '\vskip 1mm \\\\\\\\';
                    874: 	    }
                    875: 	}
                    876: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                    877:     }
                    878: 
1.159     albertel  879:     my $status=$Apache::inputtags::status['-1'];
                    880:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    881: 	$target eq 'tex') {
1.249     albertel  882: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel  883: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel  884: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                    885: 		&Apache::inputtags::grade;
1.324     albertel  886: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                    887: 		# no need to grade, and don't want to hide data
1.249     albertel  888: 	    } else {
                    889: 		# move any submission data to .hidden
                    890: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                    891: 	    }
1.159     albertel  892: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    893: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel  894: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel  895: 	    # if part is zero, no <part>s existed, so we need show the current
                    896: 	    # grading status
                    897: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    898: 	    $result.= $gradestatus;
                    899: 	}
                    900: 	if (
1.284     albertel  901: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel  902: 	    ($target eq 'answer') || ($target eq 'tex')
                    903: 	   ) {
1.227     albertel  904: 	    if ($target ne 'tex' &&
1.284     albertel  905: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www       906: 		$result.="</form>";
1.348     albertel  907: 		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
1.159     albertel  908: 	    }
                    909: 	    if ($target eq 'web') {
1.346     albertel  910: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel  911: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  912: 		my $endminipage = '';
1.284     albertel  913: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk  914: 		    $endminipage = '\end{minipage}';
                    915: 		}
1.284     albertel  916:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk  917: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel  918: 		} else {
1.262     sakharuk  919: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel  920: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk  921: 			$result .= $endminipage.'\end{document} ';
                    922: 		    } else {
                    923: 			$result .= '';
                    924: 		    }
1.159     albertel  925: 		}
                    926: 	    }
                    927: 	}
                    928: 	if ($target eq 'grade') {
                    929: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    930: 	    &finalize_storage();
                    931: 	}
1.284     albertel  932: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                    933: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel  934: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel  935: 	                        # normally we get it from above, but in CSTR
1.172     albertel  936: 	                        # we always show answer mode too.
1.159     albertel  937: 	}
                    938:     } elsif ($target eq 'meta') {
                    939: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  940: 	    @Apache::inputtags::response=();
1.159     albertel  941: 	    $result=&Apache::response::mandatory_part_meta;
                    942: 	}
1.215     albertel  943: 	$result.=&Apache::response::meta_part_order();
1.258     albertel  944: 	$result.=&Apache::response::meta_response_order();
1.159     albertel  945:     } elsif ($target eq 'edit') {
                    946: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel  947: 	$result .= &problem_edit_footer();
1.320     albertel  948:     } elsif ($target eq 'modified') {
                    949: 	 $result .= $token->[2];
                    950: 	 $result.=&Apache::edit::handle_insertafter($token->[1]);
1.159     albertel  951:     }
1.155     albertel  952: 
1.284     albertel  953:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel  954: 	&Apache::inputtags::check_for_duplicate_ids();
                    955:     }
1.204     albertel  956: 
                    957:     &reset_problem_globals('problem');
1.159     albertel  958: 
                    959:     return $result;
1.48      albertel  960: }
                    961: 
1.108     albertel  962: 
1.48      albertel  963: sub start_library {
1.159     albertel  964:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel  965:     my ($result,$form_tag_start);
1.244     albertel  966:     if ($$tagstack[0] eq 'library') {
                    967: 	&init_problem_globals('library');
                    968: 	$Apache::lonhomework::type='problem';
                    969:     }
1.159     albertel  970:     if ($target eq 'edit') {
1.343     albertel  971: 	($result,$form_tag_start)=
                    972: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    973: 			'Edit');
                    974: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel  975: 	my $temp=&Apache::edit::insertlist($target,$token);
                    976: 	$result.=$temp;
                    977:     } elsif ($target eq 'modified') {
                    978: 	$result=$token->[4];
                    979: 	$result.=&Apache::edit::handle_insert();
1.340     albertel  980:     } elsif (($target eq 'web' || $target eq 'webgrade')
                    981: 	     && $$tagstack[0] eq 'library' 
                    982: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel  983: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel  984: 	($result,$form_tag_start)=
                    985: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    986: 			$name);
1.159     albertel  987: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel  988: 	$result.=" \n $form_tag_start".	
1.159     albertel  989: 		  '<input type="hidden" name="submitted" value="yes" />';
                    990: 	$result.=&problem_web_to_edit_header($rndseed);
                    991:     }
                    992:     return $result;
1.48      albertel  993: }
                    994: 
                    995: sub end_library {
1.159     albertel  996:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    997:     my $result='';
                    998:     if ($target eq 'edit') {
                    999: 	$result=&problem_edit_footer();
                   1000:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel 1001: 	     $env{'request.state'} eq "construct") {
1.349     albertel 1002: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1003:     }
1.204     albertel 1004:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel 1005:     return $result;
1.197     www      1006: }
                   1007: 
                   1008: sub start_definetag {
1.326     albertel 1009:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      1010: 
                   1011:     my $result;
                   1012: 
                   1013:     my $name = $token->[2]->{'name'};
1.326     albertel 1014:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.197     www      1015:     if ($name=~/^\//) {
                   1016: 	$result=
                   1017:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                   1018:     } else {
                   1019: 	$result=
                   1020:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                   1021:     }
                   1022:     $skip=~s/\</\&lt\;/gs;
                   1023:     $skip=~s/\>/\&gt\;/gs;
                   1024:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                   1025:     return $result;
                   1026: }
                   1027: 
                   1028: sub end_definetag {
                   1029:     return '';
1.1       albertel 1030: }
                   1031: 
                   1032: sub start_block {
1.201     albertel 1033:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1034: 
                   1035:     my $result;
1.1       albertel 1036: 
1.339     albertel 1037:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1038: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1039: 	my $code = $token->[2]->{'condition'};
1.201     albertel 1040: 	if (defined($code)) {
1.137     albertel 1041: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1042: 		&Apache::lonxml::default_homework_load($safeeval);
                   1043: 	    }
1.131     albertel 1044: 	    $result = &Apache::run::run($code,$safeeval);
                   1045: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1046: 	} else {
                   1047: 	    $result='1';
                   1048: 	}
                   1049: 	if ( ! $result ) {
1.201     albertel 1050: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1051: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1052: 	}
                   1053: 	$result='';
                   1054:     } elsif ($target eq 'edit') {
                   1055: 	$result .=&Apache::edit::tag_start($target,$token);
                   1056: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1057: 					  $token,40);
                   1058: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1059:     } elsif ($target eq 'modified') {
                   1060: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1061: 						     $safeeval,'condition');
                   1062: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1063:     }
1.131     albertel 1064:     return $result;
1.1       albertel 1065: }
                   1066: 
                   1067: sub end_block {
1.167     www      1068:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1069:     my $result;
                   1070:     if ($target eq "edit") {
                   1071: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1072:     }
                   1073:     return $result;
                   1074: }
                   1075: 
                   1076: sub start_languageblock {
1.201     albertel 1077:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1078: 
                   1079:     my $result;
                   1080: 
1.339     albertel 1081:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1082: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1083: 	my $include = $token->[2]->{'include'};
                   1084: 	my $exclude = $token->[2]->{'exclude'};
                   1085:         my %languages=&Apache::loncommon::display_languages();
                   1086:         $result='1';
                   1087: 	if ($include) {
                   1088:             $result='';
                   1089:             foreach (split(/\,/,$include)) {
                   1090:                 if ($languages{$_}) { $result='1'; }
                   1091:             }
                   1092: 	}
                   1093:         if ($exclude) {
                   1094:             foreach (split(/\,/,$exclude)) {
                   1095:                 if ($languages{$_}) { $result='0'; }
                   1096:             }
                   1097: 	}
                   1098: 	if ( ! $result ) {
                   1099: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1100: 						   $style);
                   1101: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1102: 	}
                   1103: 	$result='';
1.167     www      1104:     } elsif ($target eq 'edit') {
                   1105: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1106: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1107: 					  $token,40);
1.211     albertel 1108: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1109: 					  $token,40);
                   1110: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1111:     } elsif ($target eq 'modified') {
                   1112: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1113: 						     $safeeval,'include',
                   1114: 						     'exclude');
1.167     www      1115: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1116:     }
                   1117:     return $result;
                   1118: }
                   1119: 
                   1120: sub end_languageblock {
1.170     www      1121:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1122:     my $result;
1.201     albertel 1123:     if ($target eq "edit") {
1.170     www      1124: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1125:     }
                   1126:     return $result;
                   1127: }
                   1128: 
                   1129: sub start_instructorcomment {
1.201     albertel 1130:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1131: 
                   1132:     my $result;
                   1133: 
1.339     albertel 1134:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1135: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.284     albertel 1136:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1137: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1138: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1139: 						   $parser,$style);
1.170     www      1140: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1141: 	}
                   1142: 	$result='';
                   1143:     } elsif ($target eq 'edit') {
                   1144: 	$result .=&Apache::edit::tag_start($target,$token);
                   1145: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1146:     }
                   1147:     return $result;
                   1148: }
                   1149: 
                   1150: sub end_instructorcomment {
1.159     albertel 1151:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1152:     my $result;
                   1153:     if ($target eq "edit") {
                   1154: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1155:     }
                   1156:     return $result;
1.4       tsai     1157: }
                   1158: 
                   1159: sub start_while {
1.326     albertel 1160:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1161: 
1.160     albertel 1162:     my $result;
1.339     albertel 1163:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1164: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1165: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1166: 
1.160     albertel 1167: 	push( @Apache::structuretags::whileconds, $code);
                   1168: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1169: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1170: 	}
                   1171: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1172: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1173: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1174: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1175: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1176: 	if ( $result ) {
                   1177: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1178: 	}
                   1179:     } elsif ($target eq 'edit') {
                   1180: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1181: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1182: 					  $token,40);
                   1183: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1184:     } elsif ($target eq 'modified') {
                   1185: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1186: 						     $safeeval,'condition');
                   1187: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1188:     }
1.160     albertel 1189:     return $result;
1.4       tsai     1190: }
                   1191: 
                   1192: sub end_while {
1.159     albertel 1193:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1194:     my $result;
                   1195: 
1.339     albertel 1196:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1197: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1198: 	my $code = pop(@Apache::structuretags::whileconds);
                   1199: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1200: 	my $line = pop(@Apache::structuretags::whileline);
                   1201: 	my $return = &Apache::run::run($code,$safeeval);
                   1202: 	my $starttime=time;
                   1203: 	my $error=0;
                   1204: 	while ($return) {
                   1205: 	    if (time-$starttime >
                   1206: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.270     albertel 1207: 		#$return = 0; $error=1; next;
1.161     albertel 1208: 	    }
                   1209: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                   1210: 	    $return = &Apache::run::run($code,$safeeval);
                   1211: 	}
                   1212: 	if ($error) {
1.270     albertel 1213: 	    &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 1214: 	}
                   1215:     } elsif ($target eq "edit") {
                   1216: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1217:     }
1.160     albertel 1218:     return $result;
1.1       albertel 1219: }
1.6       tsai     1220: 
1.160     albertel 1221: # <randomlist show="1">
1.6       tsai     1222: #  <tag1>..</tag1>
                   1223: #  <tag2>..</tag2>
                   1224: #  <tag3>..</tag3>
1.160     albertel 1225: #  ...
1.6       tsai     1226: # </randomlist>
                   1227: sub start_randomlist {
1.326     albertel 1228:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1229:     my $result;
1.339     albertel 1230:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1231: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1232: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1233: 	my $b_parser= HTML::LCParser->new(\$body);
                   1234: 	$b_parser->xml_mode(1);
                   1235: 	$b_parser->marked_sections(1);
1.159     albertel 1236: 	my $b_tok;
                   1237: 	my @randomlist;
                   1238: 	my $list_item;
                   1239: 	while($b_tok = $b_parser->get_token() ) {
                   1240: 	    if($b_tok->[0] eq 'S') { # start tag
                   1241: 		# get content of the tag until matching end tag
                   1242: 		# get all text upto the matching tag
                   1243: 		# and push the content into @randomlist
                   1244: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1245: 							   $b_parser);
                   1246: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1247: 		push(@randomlist,$list_item);
                   1248: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1249:                 #         $list_item</b>";
                   1250: 	    }
                   1251: 	    if($b_tok->[0] eq 'T') { # text
                   1252: 		# what to do with text in between tags?
                   1253: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1254: 	    }
                   1255: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1256: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1257: 	    # }
                   1258: 	}
1.303     albertel 1259: 	if (@randomlist) {
                   1260: 	    my @idx_arr = (0 .. $#randomlist);
                   1261: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1262: 	    my $bodytext = '';
                   1263: 	    my $show=$#randomlist;
                   1264: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1265: 	    $showarg--;
                   1266: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                   1267: 	    for(0 .. $show) {
                   1268: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1269: 	    }
                   1270: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1271: 	}
                   1272:     } elsif ($target eq 'edit' ) {
                   1273: 	$result .=&Apache::edit::tag_start($target,$token);
                   1274: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1275: 					   $token,5);
                   1276: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1277:     } elsif ($target eq 'modified' ) {
                   1278: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1279: 						     $safeeval,'show');
                   1280: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1281:     }
                   1282:     return $result;
1.7       tsai     1283: }
                   1284: 
                   1285: sub shuffle {
                   1286:     my $a=shift;
                   1287:     my $i;
1.303     albertel 1288:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1289: 	&Apache::response::pushrandomnumber();
1.159     albertel 1290: 	for($i=@$a;--$i;) {
                   1291: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1292: 	    next if $i == $j;
                   1293: 	    @$a[$i,$j] = @$a[$j,$i];
                   1294: 	}
1.251     albertel 1295: 	&Apache::response::poprandomnumber();
1.7       tsai     1296:     }
1.6       tsai     1297: }
                   1298: 
                   1299: sub end_randomlist {
1.159     albertel 1300:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1301:     my $result;
                   1302:     if ($target eq 'edit' ) {
                   1303: 	$result=&Apache::edit::tag_end($target,$token,
                   1304: 				       'End Randomly Parsed Block');
                   1305:     }
                   1306:     return $result;
1.6       tsai     1307: }
                   1308: 
1.283     albertel 1309: sub ordered_show_check {
                   1310:     my $last_part=$Apache::inputtags::partlist[-2];
                   1311:     my $in_order=
                   1312: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1313:     my $in_order_show=1;
                   1314:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1315: 	$in_order_show=&Apache::response::check_status($last_part);
                   1316:     }
                   1317:     return $in_order_show;
                   1318: }
                   1319: 
1.11      albertel 1320: sub start_part {
1.326     albertel 1321:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1322:     if (!$Apache::lonxml::metamode) {
                   1323: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1324: 	                                     # duedates.
                   1325:     }
1.159     albertel 1326:     my $result='';
                   1327:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1.296     albertel 1328:     if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1.159     albertel 1329:     $Apache::inputtags::part=$id;
1.177     albertel 1330:     push(@Apache::inputtags::partlist,$id);
                   1331:     @Apache::inputtags::response=();
1.159     albertel 1332:     @Apache::inputtags::previous=();
                   1333:     @Apache::inputtags::previous_version=();
1.241     albertel 1334:     $Apache::lonhomework::problemstatus=&get_problem_status($id);
1.159     albertel 1335:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1336:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1337:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1338:     my $in_order_show=&ordered_show_check();
1.214     albertel 1339:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1340:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1341:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1342: 
                   1343:     if ($target eq 'meta') {
1.224     www      1344: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1345: 	return &Apache::response::mandatory_part_meta.
                   1346: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1347:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1348: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1349: 	if ($hidden || !$in_order_show) {
1.326     albertel 1350: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1351: 	} else {
                   1352: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1353: 	    push (@Apache::inputtags::status,$status);
                   1354: 	    my $expression='$external::datestatus="'.$status.'";';
                   1355: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1356: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1357: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1358: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1359: 	    }
1.216     albertel 1360: 	    if (( $status eq 'CLOSED' ) ||
                   1361: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1362: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1363: 		( $status eq 'BANNED') ||
                   1364: 		( $status eq 'UNAVAILABLE') ||
                   1365: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1366: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1367: 							   $style);
1.159     albertel 1368: 		if ( $target eq "web" ) {
1.211     albertel 1369: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1370: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1371: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1372: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1373: 		    } else {
1.211     albertel 1374: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1375: 		    }
1.159     albertel 1376: 		}
                   1377: 	    } else {
                   1378: 		if ($target eq 'tex') {
1.284     albertel 1379: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1380: 			if ($$tagstack[-2] eq 'td') {
                   1381: 			    $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1382: 			} else {
                   1383: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1384: 			}
1.195     sakharuk 1385: 		    }
1.159     albertel 1386: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1387: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1388: 		    my @allkeys = split /,/,$allkeys;
                   1389: 		    my $allow_print_points = 0;
                   1390: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1391: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1392: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1393: 			}
                   1394: 		    }
1.275     albertel 1395: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1396: 		    if (defined($maxtries) && $maxtries < 0) {
                   1397: 			$allow_print_points=0;
                   1398: 		    }
1.302     albertel 1399: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1400: 				    '.disableexampointprint'}) eq 'yes') {
                   1401: 			$allow_print_points=0;
                   1402: 		    }
1.222     sakharuk 1403: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1404: 		} elsif ($target eq 'web') {
1.356     www      1405: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
1.159     albertel 1406: 		}
                   1407: 	    }
                   1408: 	}
                   1409:     } elsif ($target eq 'edit') {
                   1410: 	$result.=&Apache::edit::tag_start($target,$token);
                   1411: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1412: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1413: 	    '&nbsp;&nbsp;'.
                   1414: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1415: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1416:     } elsif ($target eq 'modified') {
                   1417: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1418: 						     $safeeval,'id','display');
1.159     albertel 1419: 	if ($constructtag) {
1.225     albertel 1420: 	    #limiting ids to only letters numbers, and space
1.224     www      1421: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1422: 	    $result = &Apache::edit::rebuild_tag($token);
                   1423: 	    $result.=&Apache::edit::handle_insert();
                   1424: 	}
                   1425:     }
                   1426:     return $result;
1.11      albertel 1427: }
                   1428: 
                   1429: sub end_part {
1.159     albertel 1430:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1431:     &Apache::lonxml::debug("in end_part $target ");
                   1432:     my $status=$Apache::inputtags::status['-1'];
                   1433:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1434:     my $in_order_show=&ordered_show_check();
1.321     albertel 1435:     my $result;
                   1436:     if (!$Apache::lonxml::metamode) {
                   1437: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1438: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1439:     }
1.312     albertel 1440:     if ($target eq 'grade') {
1.249     albertel 1441: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1442: 	    !$hidden && $in_order_show) {
1.311     foxr     1443: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1444: 	} else {
                   1445: 	    # move any submission data to .hidden
                   1446: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1447: 	}
1.283     albertel 1448:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1449: 	     !$hidden && $in_order_show) {
1.159     albertel 1450: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1451: 							$target);
1.212     albertel 1452: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1453: 	    $gradestatus='';
                   1454: 	}
1.311     foxr     1455: 	$result.=$gradestatus;
1.265     sakharuk 1456: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1457:     } elsif ($target eq 'edit') {
1.311     foxr     1458: 	$result.=&Apache::edit::end_table();
1.322     albertel 1459:     } elsif ($target eq 'modified') {
                   1460: 	 $result .= $token->[2];
                   1461: 	 $result.=&Apache::edit::handle_insertafter($token->[1]);
1.159     albertel 1462:     }
                   1463:     pop @Apache::inputtags::status;
                   1464:     $Apache::inputtags::part='';
1.295     albertel 1465:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1466:     return $result;
1.11      albertel 1467: }
1.1       albertel 1468: 
1.25      albertel 1469: sub start_preduedate {
1.326     albertel 1470:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1471:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1472: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1473: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1474: 	if (!$Apache::lonhomework::scantronmode &&
                   1475: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1476: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1477: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1478: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1479: 	}
1.24      albertel 1480:     }
1.159     albertel 1481:     return '';
1.24      albertel 1482: }
                   1483: 
1.25      albertel 1484: sub end_preduedate {
1.159     albertel 1485:     return '';
1.24      albertel 1486: }
                   1487: 
1.25      albertel 1488: sub start_postanswerdate {
1.326     albertel 1489:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1490:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade') {
1.300     albertel 1491: 	if ($Apache::lonhomework::scantronmode ||
                   1492: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1.326     albertel 1493: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1494: 	}
                   1495:     } elsif ($target eq 'tex') {
1.326     albertel 1496: 	&Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1497:     }
                   1498:     return '';
1.24      albertel 1499: }
                   1500: 
1.25      albertel 1501: sub end_postanswerdate {
1.159     albertel 1502:     return '';
1.24      albertel 1503: }
                   1504: 
1.25      albertel 1505: sub start_notsolved {
1.326     albertel 1506:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1507:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1508: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1509: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1510: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1511: 	if ($gradestatus =~ /^correct/ &&
                   1512: 	    &Apache::response::show_answer()) {
1.159     albertel 1513: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1514: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1515: 	}
1.24      albertel 1516:     }
1.159     albertel 1517:     return '';
1.24      albertel 1518: }
                   1519: 
1.25      albertel 1520: sub end_notsolved {
1.159     albertel 1521:     return '';
1.24      albertel 1522: }
                   1523: 
                   1524: sub start_solved {
1.326     albertel 1525:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1526:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1527: 	$target eq 'tex') {
                   1528: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1529: 	if ($gradestatus !~ /^correct/ ||
                   1530: 	    !&Apache::response::show_answer()) {
1.326     albertel 1531: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1532: 	}
1.24      albertel 1533:     }
1.159     albertel 1534:     return '';
1.24      albertel 1535: }
                   1536: 
                   1537: sub end_solved {
1.248     albertel 1538:     return '';
                   1539: }
                   1540: 
                   1541: sub start_problemtype {
1.326     albertel 1542:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1543:     my $result;
1.339     albertel 1544:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1545: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1546: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1547: 	if (!defined($mode)) { $mode='show'; }
                   1548: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1549: 	my $found=0;
                   1550: 	foreach my $type (split(',',$for)) {
                   1551: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1552: 	}
                   1553: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1554: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1555: 	}
                   1556: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1557: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1558: 	}
                   1559:     } elsif ($target eq 'edit') {
                   1560: 	$result .=&Apache::edit::tag_start($target,$token);
                   1561: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1562: 					   [['show','Show'],
                   1563: 					    ['hide','Hide']]
                   1564: 					   ,$token);
                   1565: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1566: 					     [ ['exam','Exam/Quiz Problem'],
                   1567: 					       ['survey','Survey'],
                   1568: 					       ['problem','Homework Problem'] ]
                   1569: 					     ,$token);
                   1570: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1571:     } elsif ($target eq 'modified') {
                   1572: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1573: 						     $safeeval,'mode','for');
                   1574: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1575:     }
                   1576:     return $result;
                   1577: }
                   1578: 
                   1579: sub end_problemtype {
1.159     albertel 1580:     return '';
1.24      albertel 1581: }
1.34      albertel 1582: 
                   1583: sub start_startouttext {
1.159     albertel 1584:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1585:     my @result=(''.'');
                   1586:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1587:     return (@result);
1.34      albertel 1588: }
1.159     albertel 1589: 
1.34      albertel 1590: sub end_startouttext {
1.326     albertel 1591:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1592:     my $result='';
                   1593:     my $text='';
                   1594: 
                   1595:     if ($target eq 'edit') {
1.326     albertel 1596: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.211     albertel 1597: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1598: <td>".&mt('Delete:').
1.159     albertel 1599:                  &Apache::edit::deletelist($target,$token)
                   1600: 		 ."</td>
1.42      albertel 1601: <td>".
1.159     albertel 1602:                  &Apache::edit::insertlist($target,$token).
1.362     albertel 1603: 		 '</td><td align="right" valign="top">' .
                   1604: 		 &Apache::loncommon::helpLatexCheatsheet().
1.159     albertel 1605: 		 &Apache::edit::end_row().
1.362     albertel 1606:                  &Apache::edit::start_spanning_row()."\n".
1.255     www      1607: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1608:     }
                   1609:     if ($target eq 'modified') {
1.219     albertel 1610: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1611:     }
                   1612:     if ($target eq 'tex') {
                   1613: 	$result .= '\noindent ';
                   1614:     }
                   1615:     return $result;
1.34      albertel 1616: }
1.159     albertel 1617: 
1.34      albertel 1618: sub start_endouttext {
1.159     albertel 1619:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1620:     my $result='';
                   1621:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1622:     if ($target eq "modified") {
                   1623: 	$result='<endouttext />'.
                   1624: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1625:     return $result;
1.34      albertel 1626: }
1.159     albertel 1627: 
1.34      albertel 1628: sub end_endouttext {
1.159     albertel 1629:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1630:     my @result=('','');
                   1631:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1632:     return (@result);
1.34      albertel 1633: }
1.159     albertel 1634: 
1.45      albertel 1635: sub delete_startouttext {
1.326     albertel 1636:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1637:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 1638:     my $text=$$parser['-1']->get_text("/endouttext");
                   1639:     my $ntoken=$$parser['-1']->get_token();
                   1640:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1641:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1642:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1643:     # they did the last time round
                   1644:     &Apache::lonxml::increasedepth($ntoken);
                   1645:     &Apache::lonxml::decreasedepth($ntoken);
                   1646:     return 1;
1.193     www      1647: }
                   1648: 
                   1649: sub start_simpleeditbutton {
                   1650:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1651:     my $result='';
1.284     albertel 1652:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 1653: 	($target eq 'web') &&
1.330     albertel 1654:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 1655:         my $url=$env{'request.noversionuri'};
1.193     www      1656:         $url=~s/\?.*$//;
1.367     albertel 1657: 	my ($symb) = &Apache::lonnet::whichuser();
1.194     www      1658: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.356     www      1659:                 '<a href="'.$url.'/smpedit?symb='.&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      1660: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1661:     }
                   1662:     return $result;
                   1663: }
                   1664: 
                   1665: sub end_simpleeditbutton {
                   1666:     return '';
1.45      albertel 1667: }
1.34      albertel 1668: 
1.1       albertel 1669: 1;
                   1670: __END__

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