Annotation of loncom/homework/structuretags.pm, revision 1.361

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.361   ! albertel    4: # $Id: structuretags.pm,v 1.360 2006/07/03 02:52:20 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:     }
                    137: 
                    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' || $target eq 'webgrade')) {
                    144: 
                    145: 	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonxml::whichuser();
                    146: 	if ($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: 	}
                    165: 	$form_tag_start.='>';
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: 	    $form_tag_start.=
                    172: 		'<input type="hidden" name="symb" value="'.$symb.'" />';
                    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 $Apache::lonhomework::name;
                    183:     }
1.279     albertel  184:     my ($symb)=&Apache::lonxml::whichuser();
                    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 $rndseed;
1.162     albertel  201:     my ($symb)=&Apache::lonxml::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) = 
                    349: 	&Apache::lonxml::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,$name) = 
                    395: 	    &Apache::lonxml::whichuser($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: 	$Apache::lonhomework::scantronmode=1;
                    594:     }
1.161     albertel  595: 
1.246     albertel  596:     &initialize_storage();
1.159     albertel  597:     if ($target ne 'analyze') {
                    598: 	if ($target eq 'web') {
                    599: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::history);
1.238     albertel  600: 	}
1.284     albertel  601:        	if ($env{'request.state'} eq 'construct') { &set_problem_state('0'); }
1.159     albertel  602: 	$Apache::lonhomework::type=&Apache::lonnet::EXT('resource.0.type');
1.284     albertel  603: 	if (($env{'request.state'} eq 'construct') &&
                    604: 	    defined($env{'form.problemtype'})) {
                    605: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  606: 	}
1.332     albertel  607: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  608:     }
1.164     albertel  609:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  610: 	my $uri=$env{'request.uri'};
1.159     albertel  611: 	if ($uri=~/\.(\w+)$/) {
                    612: 	    $Apache::lonhomework::type=$1;
                    613: 	    &Apache::lonxml::debug("Using type of $1");
                    614: 	} else {
                    615: 	    $Apache::lonhomework::type='problem';
                    616: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    617: 	}
1.87      albertel  618:     }
1.301     albertel  619:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       620: 
1.159     albertel  621:     #added vars to the scripting enviroment
1.213     albertel  622:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  623:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  624:     &Apache::run::run($expression,$safeeval);
1.159     albertel  625:     my $status;
                    626:     my $accessmsg;
                    627: 
1.343     albertel  628:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel  629:     my ($result,$form_tag_start);
1.354     albertel  630:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
                    631: 	|| $target eq 'edit') {
1.350     albertel  632: 	($result,$form_tag_start) =
                    633: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    634: 			$name);
                    635:     }
                    636: 
1.284     albertel  637:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  638: 
                    639:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    640:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    641: 	$target eq 'tex') {
                    642: 	#handle exam checkout
                    643: 	if ($Apache::lonhomework::type eq 'exam') {
                    644: 	    my $token=
                    645: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  646: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  647: 		$token=&Apache::lonxml::maketoken();
                    648: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    649: 		    $token;
                    650: 	    }
1.343     albertel  651: 	    $result.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  652: 	}
1.284     albertel  653: 	if ($env{'form.markaccess'}) {
1.252     albertel  654: 	    &Apache::lonnet::set_first_access('map');
                    655: 	}
1.159     albertel  656: 	#handle rand seed in construction space
                    657: 	my $rndseed=&setup_rndseed($safeeval);
1.162     albertel  658: 	my ($symb)=&Apache::lonxml::whichuser();
1.333     albertel  659: 	if ($env{'request.state'} ne "construct" && 
                    660: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  661: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
                    662: 		$rndseed.'" />'.
                    663: 		    '<input type="submit" name="resetdata"
1.334     albertel  664:                              value="'.&mt('New Problem Variation').'" />';
                    665: 	    if (exists($env{'form.username'})) {
                    666: 		$form_tag_start.=
1.164     albertel  667: 		    '<input type="hidden" name="username"
1.284     albertel  668:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  669: 	    }
1.333     albertel  670: 	    if ($env{'request.role.adv'}) {
1.267     albertel  671: 		$form_tag_start.=
1.300     albertel  672: 		    ' <label><input type="checkbox" name="showallfoils" ';
1.284     albertel  673: 		if (defined($env{'form.showallfoils'})) {
1.267     albertel  674: 		    $form_tag_start.='checked="on"';
                    675: 		}
1.300     albertel  676: 		$form_tag_start.= ' />'.&mt('&nbsp;Show&nbsp;All&nbsp;Foils').
                    677: 		    '</label>';
1.267     albertel  678: 	    }
                    679: 	    $form_tag_start.='<hr />';
1.162     albertel  680: 	}
1.324     albertel  681: 
                    682: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    683: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  684: 	push (@Apache::inputtags::status,$status);
1.324     albertel  685: 
1.159     albertel  686: 	my $expression='$external::datestatus="'.$status.'";';
                    687: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    688: 	&Apache::run::run($expression,$safeeval);
                    689: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  690: 
1.159     albertel  691: 	if (( $status eq 'CLOSED' ) ||
                    692: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  693: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  694: 	    ( $status eq 'BANNED') ||
1.216     albertel  695: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  696: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  697: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  698: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    699: 						       $style);
1.159     albertel  700: 	    if ( $target eq "web" ) {
1.343     albertel  701: 		my $msg;
1.159     albertel  702: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  703: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.253     albertel  704: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  705: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  706: 		}
1.216     albertel  707: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.159     albertel  708: 		    $msg.='The problem '.$accessmsg;
                    709: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel  710: 		    $msg.=&checkout_msg();
1.252     albertel  711: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  712: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  713: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
                    714: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work.");
1.159     albertel  715: 		}
                    716: 		$result.=$msg.'<br />';
                    717: 	    } elsif ($target eq 'tex') {
1.332     albertel  718: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    719: 		                    : '\begin{minipage}{\textwidth}';
                    720: 		$result.='\begin{document}\noindent \vskip 1 mm '.
                    721: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  722: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  723: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  724: 		} else {
1.211     albertel  725: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  726: 		}
                    727: 	    }
1.324     albertel  728: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  729: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    730: 						       $style);
1.324     albertel  731: 	    if ($target eq 'web') {
                    732: 		$result .= &Apache::bridgetask::proctor_validation_screen();
                    733: 	    } elsif ($target eq 'grade') {
                    734: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                    735: 							'problem');
                    736: 	    }
1.159     albertel  737: 	} elsif ($target eq 'web') {
1.360     albertel  738: 	    if ($status eq 'CAN_ANSWER' 
                    739: 		&& $slot_name ne ''
                    740: 		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
                    741: 		# unproctored slot access, self checkin
                    742: 		&Apache::bridgetask::check_in('problem',undef,undef,
                    743: 					      $slot_name);
                    744: 	    }
1.343     albertel  745: 	    $result.="\n $form_tag_start".	
1.227     albertel  746: 	      '<input type="hidden" name="submitted" value="yes" />';
                    747: 	    # create a page header and exit
1.284     albertel  748: 	    if ($env{'request.state'} eq "construct") {
                    749: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.227     albertel  750: 	    }
                    751: 	    # if we are viewing someone else preserve that info
1.284     albertel  752: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel  753: 		foreach my $field ('symb','courseid','domain','username') {
                    754: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel  755: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel  756: 		}
                    757: 	    }
                    758: 	} elsif ($target eq 'tex') {
1.319     foxr      759: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                    760: 
1.99      sakharuk  761: 	}
1.159     albertel  762:     } elsif ($target eq 'edit') {
1.343     albertel  763: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel  764: 	$Apache::lonxml::warnings_error_header=
                    765: 	    &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  766: 	my $temp=&Apache::edit::insertlist($target,$token);
                    767: 	$result.=$temp;
                    768:     } elsif ($target eq 'modified') {
                    769: 	$result=$token->[4];
                    770: 	$result.=&Apache::edit::handle_insert();
                    771:     } else {
                    772: 	# page_start returned a starting result, delete it if we don't need it
                    773: 	$result = '';
1.99      sakharuk  774:     }
1.159     albertel  775:     return $result;
1.9       albertel  776: }
                    777: 
                    778: sub end_problem {
1.159     albertel  779:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel  780:     my $result;
1.310     foxr      781: 
1.321     albertel  782:     if (!$Apache::lonxml::metamode) {
                    783: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel  784: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel  785:     }
1.319     foxr      786: 
                    787:     if ($target eq 'tex') {
1.321     albertel  788: 
                    789: 	# Figure out the front matter and replace the
                    790: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                    791: 	# this in end_problem because whether or not we display due
                    792: 	# dates depends on whether due dates have already been
                    793: 	# displayed in the problem parts.
                    794: 
1.319     foxr      795: 	my $frontmatter   = '';
                    796: 	my $startminipage = '';
                    797: 	if (not $env{'form.problem_split'}=~/yes/) {
                    798: 	    $startminipage = '\begin{minipage}{\textwidth}';
                    799: 	}
                    800: 	my $id = $Apache::inputtags::part;
                    801: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                    802: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                    803: 	my @packages = split /,/,$packages;
                    804: 	my $allow_print_points = 0;
                    805: 	foreach my $partial_key (@packages) {
                    806: 	    if ($partial_key=~m/^part_0$/) {
                    807: 		$allow_print_points=1;
                    808: 	    }
                    809: 	}
                    810: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                    811: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                    812: 	if (lc($env{'course.'.$env{'request.course.id'}.
                    813: 			'.disableexampointprint'}) eq 'yes') {
                    814: 	    $allow_print_points=0;
                    815: 	}
                    816: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
                    817: 	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 ';
                    818: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                    819: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                    820: 	
                    821: 	#  Figure out what the due date is and if we need to print
                    822: 	#  it in the problem header.  We have been logging the
                    823: 	#  last due date written to file. 
                    824: 	
                    825: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                    826: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
                    827: 	my $temp_file;
                    828: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                    829: 	
                    830: 	# Figure out what the last printed due date is or set it
                    831: 	# to the epoch if no duedates have been printed.
                    832: 	
                    833: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                    834: 	if (-e $filename) {
                    835: 	    $temp_file = Apache::File->new($filename);
                    836: 	    my @due_file      = <$temp_file>;
                    837: 	    $due_file_content = $due_file[$#due_file];
                    838: 	    chomp $due_file_content;
                    839: 	} 
                    840: 	
                    841: 	# We display the due date iff it is not the same as the last
                    842: 	# duedate in problem header ($due_file_content), and
                    843: 	# none of our parts displayed a duedate.
                    844: 	#
                    845: 	my $parts_with_displayduedate;
                    846: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                    847: 	    $parts_with_displayduedate = 
                    848: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                    849: 	} else {
                    850: 	    $parts_with_displayduedate = 0;
                    851: 	}
                    852: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                    853: 	    $temp_file = Apache::File->new('>'.$filename);
                    854: 	    print $temp_file "$duetime\n";
                    855: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    856: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                    857: 		    $frontmatter .= $begin_doc.
                    858: 			'\textit{Due date: '.$duedate.'} '.$toc_line;
                    859: 		} else {
                    860: 		    $frontmatter.= $begin_doc.$toc_line;
                    861: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    862: 		}
                    863: 	    } else {
                    864: 		$frontmatter .= '\vskip 1mm\textit{Due date: '.$duedate.'} \\\\\\\\';
                    865: 	    }
                    866: 	} else {
                    867: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                    868: 		$frontmatter .= $begin_doc.$toc_line;
                    869: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                    870: 	    } else {
                    871: 		$frontmatter .= '\vskip 1mm \\\\\\\\';
                    872: 	    }
                    873: 	}
                    874: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                    875:     }
                    876: 
1.159     albertel  877:     my $status=$Apache::inputtags::status['-1'];
                    878:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                    879: 	$target eq 'tex') {
1.249     albertel  880: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel  881: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel  882: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                    883: 		&Apache::inputtags::grade;
1.324     albertel  884: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                    885: 		# no need to grade, and don't want to hide data
1.249     albertel  886: 	    } else {
                    887: 		# move any submission data to .hidden
                    888: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                    889: 	    }
1.159     albertel  890: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                    891: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel  892: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel  893: 	    # if part is zero, no <part>s existed, so we need show the current
                    894: 	    # grading status
                    895: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                    896: 	    $result.= $gradestatus;
                    897: 	}
                    898: 	if (
1.284     albertel  899: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel  900: 	    ($target eq 'answer') || ($target eq 'tex')
                    901: 	   ) {
1.227     albertel  902: 	    if ($target ne 'tex' &&
1.284     albertel  903: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www       904: 		$result.="</form>";
1.348     albertel  905: 		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
1.159     albertel  906: 	    }
                    907: 	    if ($target eq 'web') {
1.346     albertel  908: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel  909: 	    } elsif ($target eq 'tex') {
1.178     sakharuk  910: 		my $endminipage = '';
1.284     albertel  911: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk  912: 		    $endminipage = '\end{minipage}';
                    913: 		}
1.284     albertel  914:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk  915: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel  916: 		} else {
1.262     sakharuk  917: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel  918: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk  919: 			$result .= $endminipage.'\end{document} ';
                    920: 		    } else {
                    921: 			$result .= '';
                    922: 		    }
1.159     albertel  923: 		}
                    924: 	    }
                    925: 	}
                    926: 	if ($target eq 'grade') {
                    927: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                    928: 	    &finalize_storage();
                    929: 	}
1.284     albertel  930: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                    931: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel  932: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel  933: 	                        # normally we get it from above, but in CSTR
1.172     albertel  934: 	                        # we always show answer mode too.
1.159     albertel  935: 	}
                    936:     } elsif ($target eq 'meta') {
                    937: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel  938: 	    @Apache::inputtags::response=();
1.159     albertel  939: 	    $result=&Apache::response::mandatory_part_meta;
                    940: 	}
1.215     albertel  941: 	$result.=&Apache::response::meta_part_order();
1.258     albertel  942: 	$result.=&Apache::response::meta_response_order();
1.159     albertel  943:     } elsif ($target eq 'edit') {
                    944: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel  945: 	$result .= &problem_edit_footer();
1.320     albertel  946:     } elsif ($target eq 'modified') {
                    947: 	 $result .= $token->[2];
                    948: 	 $result.=&Apache::edit::handle_insertafter($token->[1]);
1.159     albertel  949:     }
1.155     albertel  950: 
1.284     albertel  951:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel  952: 	&Apache::inputtags::check_for_duplicate_ids();
                    953:     }
1.204     albertel  954: 
                    955:     &reset_problem_globals('problem');
1.159     albertel  956: 
                    957:     return $result;
1.48      albertel  958: }
                    959: 
1.108     albertel  960: 
1.48      albertel  961: sub start_library {
1.159     albertel  962:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel  963:     my ($result,$form_tag_start);
1.244     albertel  964:     if ($$tagstack[0] eq 'library') {
                    965: 	&init_problem_globals('library');
                    966: 	$Apache::lonhomework::type='problem';
                    967:     }
1.159     albertel  968:     if ($target eq 'edit') {
1.343     albertel  969: 	($result,$form_tag_start)=
                    970: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    971: 			'Edit');
                    972: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel  973: 	my $temp=&Apache::edit::insertlist($target,$token);
                    974: 	$result.=$temp;
                    975:     } elsif ($target eq 'modified') {
                    976: 	$result=$token->[4];
                    977: 	$result.=&Apache::edit::handle_insert();
1.340     albertel  978:     } elsif (($target eq 'web' || $target eq 'webgrade')
                    979: 	     && $$tagstack[0] eq 'library' 
                    980: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel  981: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel  982: 	($result,$form_tag_start)=
                    983: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    984: 			$name);
1.159     albertel  985: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel  986: 	$result.=" \n $form_tag_start".	
1.159     albertel  987: 		  '<input type="hidden" name="submitted" value="yes" />';
                    988: 	$result.=&problem_web_to_edit_header($rndseed);
                    989:     }
                    990:     return $result;
1.48      albertel  991: }
                    992: 
                    993: sub end_library {
1.159     albertel  994:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                    995:     my $result='';
                    996:     if ($target eq 'edit') {
                    997: 	$result=&problem_edit_footer();
                    998:     } elsif ($target eq 'web' && $$tagstack[0] ne 'problem' &&
1.284     albertel  999: 	     $env{'request.state'} eq "construct") {
1.349     albertel 1000: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1001:     }
1.204     albertel 1002:     if ($$tagstack[0] eq 'library') { &reset_problem_globals('library') };
1.159     albertel 1003:     return $result;
1.197     www      1004: }
                   1005: 
                   1006: sub start_definetag {
1.326     albertel 1007:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      1008: 
                   1009:     my $result;
                   1010: 
                   1011:     my $name = $token->[2]->{'name'};
1.326     albertel 1012:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.197     www      1013:     if ($name=~/^\//) {
                   1014: 	$result=
                   1015:  '<br /><table bgcolor="#FFBBBB"><tr><th>END <tt>'.$name.'</tt></th></tr>';
                   1016:     } else {
                   1017: 	$result=
                   1018:  '<br /><table bgcolor="#BBFFBB"><tr><th>BEGIN <tt>'.$name.'</tt></th></tr>';
                   1019:     }
                   1020:     $skip=~s/\</\&lt\;/gs;
                   1021:     $skip=~s/\>/\&gt\;/gs;
                   1022:     $result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
                   1023:     return $result;
                   1024: }
                   1025: 
                   1026: sub end_definetag {
                   1027:     return '';
1.1       albertel 1028: }
                   1029: 
                   1030: sub start_block {
1.201     albertel 1031:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1032: 
                   1033:     my $result;
1.1       albertel 1034: 
1.339     albertel 1035:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1036: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1037: 	my $code = $token->[2]->{'condition'};
1.201     albertel 1038: 	if (defined($code)) {
1.137     albertel 1039: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1040: 		&Apache::lonxml::default_homework_load($safeeval);
                   1041: 	    }
1.131     albertel 1042: 	    $result = &Apache::run::run($code,$safeeval);
                   1043: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1044: 	} else {
                   1045: 	    $result='1';
                   1046: 	}
                   1047: 	if ( ! $result ) {
1.201     albertel 1048: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1049: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1050: 	}
                   1051: 	$result='';
                   1052:     } elsif ($target eq 'edit') {
                   1053: 	$result .=&Apache::edit::tag_start($target,$token);
                   1054: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1055: 					  $token,40);
                   1056: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1057:     } elsif ($target eq 'modified') {
                   1058: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1059: 						     $safeeval,'condition');
                   1060: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1061:     }
1.131     albertel 1062:     return $result;
1.1       albertel 1063: }
                   1064: 
                   1065: sub end_block {
1.167     www      1066:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1067:     my $result;
                   1068:     if ($target eq "edit") {
                   1069: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1070:     }
                   1071:     return $result;
                   1072: }
                   1073: 
                   1074: sub start_languageblock {
1.201     albertel 1075:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1076: 
                   1077:     my $result;
                   1078: 
1.339     albertel 1079:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1080: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1081: 	my $include = $token->[2]->{'include'};
                   1082: 	my $exclude = $token->[2]->{'exclude'};
                   1083:         my %languages=&Apache::loncommon::display_languages();
                   1084:         $result='1';
                   1085: 	if ($include) {
                   1086:             $result='';
                   1087:             foreach (split(/\,/,$include)) {
                   1088:                 if ($languages{$_}) { $result='1'; }
                   1089:             }
                   1090: 	}
                   1091:         if ($exclude) {
                   1092:             foreach (split(/\,/,$exclude)) {
                   1093:                 if ($languages{$_}) { $result='0'; }
                   1094:             }
                   1095: 	}
                   1096: 	if ( ! $result ) {
                   1097: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1098: 						   $style);
                   1099: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1100: 	}
                   1101: 	$result='';
1.167     www      1102:     } elsif ($target eq 'edit') {
                   1103: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1104: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1105: 					  $token,40);
1.211     albertel 1106: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1107: 					  $token,40);
                   1108: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1109:     } elsif ($target eq 'modified') {
                   1110: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1111: 						     $safeeval,'include',
                   1112: 						     'exclude');
1.167     www      1113: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1114:     }
                   1115:     return $result;
                   1116: }
                   1117: 
                   1118: sub end_languageblock {
1.170     www      1119:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1120:     my $result;
1.201     albertel 1121:     if ($target eq "edit") {
1.170     www      1122: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1123:     }
                   1124:     return $result;
                   1125: }
                   1126: 
                   1127: sub start_instructorcomment {
1.201     albertel 1128:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1129: 
                   1130:     my $result;
                   1131: 
1.339     albertel 1132:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1133: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.284     albertel 1134:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1135: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1136: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1137: 						   $parser,$style);
1.170     www      1138: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1139: 	}
                   1140: 	$result='';
                   1141:     } elsif ($target eq 'edit') {
                   1142: 	$result .=&Apache::edit::tag_start($target,$token);
                   1143: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1144:     }
                   1145:     return $result;
                   1146: }
                   1147: 
                   1148: sub end_instructorcomment {
1.159     albertel 1149:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1150:     my $result;
                   1151:     if ($target eq "edit") {
                   1152: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1153:     }
                   1154:     return $result;
1.4       tsai     1155: }
                   1156: 
                   1157: sub start_while {
1.326     albertel 1158:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1159: 
1.160     albertel 1160:     my $result;
1.339     albertel 1161:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1162: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1163: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1164: 
1.160     albertel 1165: 	push( @Apache::structuretags::whileconds, $code);
                   1166: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1167: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1168: 	}
                   1169: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1170: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1171: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1172: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1173: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1174: 	if ( $result ) {
                   1175: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1176: 	}
                   1177:     } elsif ($target eq 'edit') {
                   1178: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1179: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1180: 					  $token,40);
                   1181: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1182:     } elsif ($target eq 'modified') {
                   1183: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1184: 						     $safeeval,'condition');
                   1185: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1186:     }
1.160     albertel 1187:     return $result;
1.4       tsai     1188: }
                   1189: 
                   1190: sub end_while {
1.159     albertel 1191:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1192:     my $result;
                   1193: 
1.339     albertel 1194:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1195: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1196: 	my $code = pop(@Apache::structuretags::whileconds);
                   1197: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1198: 	my $line = pop(@Apache::structuretags::whileline);
                   1199: 	my $return = &Apache::run::run($code,$safeeval);
                   1200: 	my $starttime=time;
                   1201: 	my $error=0;
                   1202: 	while ($return) {
                   1203: 	    if (time-$starttime >
                   1204: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.270     albertel 1205: 		#$return = 0; $error=1; next;
1.161     albertel 1206: 	    }
                   1207: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
                   1208: 	    $return = &Apache::run::run($code,$safeeval);
                   1209: 	}
                   1210: 	if ($error) {
1.270     albertel 1211: 	    &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 1212: 	}
                   1213:     } elsif ($target eq "edit") {
                   1214: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1215:     }
1.160     albertel 1216:     return $result;
1.1       albertel 1217: }
1.6       tsai     1218: 
1.160     albertel 1219: # <randomlist show="1">
1.6       tsai     1220: #  <tag1>..</tag1>
                   1221: #  <tag2>..</tag2>
                   1222: #  <tag3>..</tag3>
1.160     albertel 1223: #  ...
1.6       tsai     1224: # </randomlist>
                   1225: sub start_randomlist {
1.326     albertel 1226:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1227:     my $result;
1.339     albertel 1228:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1229: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1230: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1231: 	my $b_parser= HTML::LCParser->new(\$body);
                   1232: 	$b_parser->xml_mode(1);
                   1233: 	$b_parser->marked_sections(1);
1.159     albertel 1234: 	my $b_tok;
                   1235: 	my @randomlist;
                   1236: 	my $list_item;
                   1237: 	while($b_tok = $b_parser->get_token() ) {
                   1238: 	    if($b_tok->[0] eq 'S') { # start tag
                   1239: 		# get content of the tag until matching end tag
                   1240: 		# get all text upto the matching tag
                   1241: 		# and push the content into @randomlist
                   1242: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1243: 							   $b_parser);
                   1244: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1245: 		push(@randomlist,$list_item);
                   1246: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1247:                 #         $list_item</b>";
                   1248: 	    }
                   1249: 	    if($b_tok->[0] eq 'T') { # text
                   1250: 		# what to do with text in between tags?
                   1251: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1252: 	    }
                   1253: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1254: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1255: 	    # }
                   1256: 	}
1.303     albertel 1257: 	if (@randomlist) {
                   1258: 	    my @idx_arr = (0 .. $#randomlist);
                   1259: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1260: 	    my $bodytext = '';
                   1261: 	    my $show=$#randomlist;
                   1262: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1263: 	    $showarg--;
                   1264: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
                   1265: 	    for(0 .. $show) {
                   1266: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1267: 	    }
                   1268: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1269: 	}
                   1270:     } elsif ($target eq 'edit' ) {
                   1271: 	$result .=&Apache::edit::tag_start($target,$token);
                   1272: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1273: 					   $token,5);
                   1274: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1275:     } elsif ($target eq 'modified' ) {
                   1276: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1277: 						     $safeeval,'show');
                   1278: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1279:     }
                   1280:     return $result;
1.7       tsai     1281: }
                   1282: 
                   1283: sub shuffle {
                   1284:     my $a=shift;
                   1285:     my $i;
1.303     albertel 1286:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1287: 	&Apache::response::pushrandomnumber();
1.159     albertel 1288: 	for($i=@$a;--$i;) {
                   1289: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1290: 	    next if $i == $j;
                   1291: 	    @$a[$i,$j] = @$a[$j,$i];
                   1292: 	}
1.251     albertel 1293: 	&Apache::response::poprandomnumber();
1.7       tsai     1294:     }
1.6       tsai     1295: }
                   1296: 
                   1297: sub end_randomlist {
1.159     albertel 1298:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1299:     my $result;
                   1300:     if ($target eq 'edit' ) {
                   1301: 	$result=&Apache::edit::tag_end($target,$token,
                   1302: 				       'End Randomly Parsed Block');
                   1303:     }
                   1304:     return $result;
1.6       tsai     1305: }
                   1306: 
1.283     albertel 1307: sub ordered_show_check {
                   1308:     my $last_part=$Apache::inputtags::partlist[-2];
                   1309:     my $in_order=
                   1310: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1311:     my $in_order_show=1;
                   1312:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1313: 	$in_order_show=&Apache::response::check_status($last_part);
                   1314:     }
                   1315:     return $in_order_show;
                   1316: }
                   1317: 
1.11      albertel 1318: sub start_part {
1.326     albertel 1319:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1320:     if (!$Apache::lonxml::metamode) {
                   1321: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1322: 	                                     # duedates.
                   1323:     }
1.159     albertel 1324:     my $result='';
                   1325:     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
1.296     albertel 1326:     if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
1.159     albertel 1327:     $Apache::inputtags::part=$id;
1.177     albertel 1328:     push(@Apache::inputtags::partlist,$id);
                   1329:     @Apache::inputtags::response=();
1.159     albertel 1330:     @Apache::inputtags::previous=();
                   1331:     @Apache::inputtags::previous_version=();
1.241     albertel 1332:     $Apache::lonhomework::problemstatus=&get_problem_status($id);
1.159     albertel 1333:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1334:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1335:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1336:     my $in_order_show=&ordered_show_check();
1.214     albertel 1337:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1338:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1339:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1340: 
                   1341:     if ($target eq 'meta') {
1.224     www      1342: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1343: 	return &Apache::response::mandatory_part_meta.
                   1344: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1345:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1346: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1347: 	if ($hidden || !$in_order_show) {
1.326     albertel 1348: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1349: 	} else {
                   1350: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1351: 	    push (@Apache::inputtags::status,$status);
                   1352: 	    my $expression='$external::datestatus="'.$status.'";';
                   1353: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1354: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1355: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1356: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1357: 	    }
1.216     albertel 1358: 	    if (( $status eq 'CLOSED' ) ||
                   1359: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1360: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1361: 		( $status eq 'BANNED') ||
                   1362: 		( $status eq 'UNAVAILABLE') ||
                   1363: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1364: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1365: 							   $style);
1.159     albertel 1366: 		if ( $target eq "web" ) {
1.211     albertel 1367: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1368: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1369: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1370: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1371: 		    } else {
1.211     albertel 1372: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1373: 		    }
1.159     albertel 1374: 		}
                   1375: 	    } else {
                   1376: 		if ($target eq 'tex') {
1.284     albertel 1377: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1378: 			if ($$tagstack[-2] eq 'td') {
                   1379: 			    $result.='\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1380: 			} else {
                   1381: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1382: 			}
1.195     sakharuk 1383: 		    }
1.159     albertel 1384: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1385: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1386: 		    my @allkeys = split /,/,$allkeys;
                   1387: 		    my $allow_print_points = 0;
                   1388: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1389: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1390: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1391: 			}
                   1392: 		    }
1.275     albertel 1393: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1394: 		    if (defined($maxtries) && $maxtries < 0) {
                   1395: 			$allow_print_points=0;
                   1396: 		    }
1.302     albertel 1397: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1398: 				    '.disableexampointprint'}) eq 'yes') {
                   1399: 			$allow_print_points=0;
                   1400: 		    }
1.222     sakharuk 1401: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1402: 		} elsif ($target eq 'web') {
1.356     www      1403: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
1.159     albertel 1404: 		}
                   1405: 	    }
                   1406: 	}
                   1407:     } elsif ($target eq 'edit') {
                   1408: 	$result.=&Apache::edit::tag_start($target,$token);
                   1409: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1410: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1411: 	    '&nbsp;&nbsp;'.
                   1412: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1413: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1414:     } elsif ($target eq 'modified') {
                   1415: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1416: 						     $safeeval,'id','display');
1.159     albertel 1417: 	if ($constructtag) {
1.225     albertel 1418: 	    #limiting ids to only letters numbers, and space
1.224     www      1419: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1420: 	    $result = &Apache::edit::rebuild_tag($token);
                   1421: 	    $result.=&Apache::edit::handle_insert();
                   1422: 	}
                   1423:     }
                   1424:     return $result;
1.11      albertel 1425: }
                   1426: 
                   1427: sub end_part {
1.159     albertel 1428:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1429:     &Apache::lonxml::debug("in end_part $target ");
                   1430:     my $status=$Apache::inputtags::status['-1'];
                   1431:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1432:     my $in_order_show=&ordered_show_check();
1.321     albertel 1433:     my $result;
                   1434:     if (!$Apache::lonxml::metamode) {
                   1435: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1436: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1437:     }
1.312     albertel 1438:     if ($target eq 'grade') {
1.249     albertel 1439: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1440: 	    !$hidden && $in_order_show) {
1.311     foxr     1441: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1442: 	} else {
                   1443: 	    # move any submission data to .hidden
                   1444: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1445: 	}
1.283     albertel 1446:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1447: 	     !$hidden && $in_order_show) {
1.159     albertel 1448: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1449: 							$target);
1.212     albertel 1450: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1451: 	    $gradestatus='';
                   1452: 	}
1.311     foxr     1453: 	$result.=$gradestatus;
1.265     sakharuk 1454: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1455:     } elsif ($target eq 'edit') {
1.311     foxr     1456: 	$result.=&Apache::edit::end_table();
1.322     albertel 1457:     } elsif ($target eq 'modified') {
                   1458: 	 $result .= $token->[2];
                   1459: 	 $result.=&Apache::edit::handle_insertafter($token->[1]);
1.159     albertel 1460:     }
                   1461:     pop @Apache::inputtags::status;
                   1462:     $Apache::inputtags::part='';
1.295     albertel 1463:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1464:     return $result;
1.11      albertel 1465: }
1.1       albertel 1466: 
1.25      albertel 1467: sub start_preduedate {
1.326     albertel 1468:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1469:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1470: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1471: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1472: 	if (!$Apache::lonhomework::scantronmode &&
                   1473: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1474: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1475: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1476: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1477: 	}
1.24      albertel 1478:     }
1.159     albertel 1479:     return '';
1.24      albertel 1480: }
                   1481: 
1.25      albertel 1482: sub end_preduedate {
1.159     albertel 1483:     return '';
1.24      albertel 1484: }
                   1485: 
1.25      albertel 1486: sub start_postanswerdate {
1.326     albertel 1487:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1488:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade') {
1.300     albertel 1489: 	if ($Apache::lonhomework::scantronmode ||
                   1490: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER') {
1.326     albertel 1491: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1492: 	}
                   1493:     } elsif ($target eq 'tex') {
1.326     albertel 1494: 	&Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1495:     }
                   1496:     return '';
1.24      albertel 1497: }
                   1498: 
1.25      albertel 1499: sub end_postanswerdate {
1.159     albertel 1500:     return '';
1.24      albertel 1501: }
                   1502: 
1.25      albertel 1503: sub start_notsolved {
1.326     albertel 1504:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1505:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1506: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1507: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1508: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1509: 	if ($gradestatus =~ /^correct/ &&
                   1510: 	    &Apache::response::show_answer()) {
1.159     albertel 1511: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1512: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1513: 	}
1.24      albertel 1514:     }
1.159     albertel 1515:     return '';
1.24      albertel 1516: }
                   1517: 
1.25      albertel 1518: sub end_notsolved {
1.159     albertel 1519:     return '';
1.24      albertel 1520: }
                   1521: 
                   1522: sub start_solved {
1.326     albertel 1523:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1524:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1525: 	$target eq 'tex') {
                   1526: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1527: 	if ($gradestatus !~ /^correct/ ||
                   1528: 	    !&Apache::response::show_answer()) {
1.326     albertel 1529: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1530: 	}
1.24      albertel 1531:     }
1.159     albertel 1532:     return '';
1.24      albertel 1533: }
                   1534: 
                   1535: sub end_solved {
1.248     albertel 1536:     return '';
                   1537: }
                   1538: 
                   1539: sub start_problemtype {
1.326     albertel 1540:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1541:     my $result;
1.339     albertel 1542:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1543: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1544: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1545: 	if (!defined($mode)) { $mode='show'; }
                   1546: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1547: 	my $found=0;
                   1548: 	foreach my $type (split(',',$for)) {
                   1549: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1550: 	}
                   1551: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1552: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1553: 	}
                   1554: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1555: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1556: 	}
                   1557:     } elsif ($target eq 'edit') {
                   1558: 	$result .=&Apache::edit::tag_start($target,$token);
                   1559: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1560: 					   [['show','Show'],
                   1561: 					    ['hide','Hide']]
                   1562: 					   ,$token);
                   1563: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1564: 					     [ ['exam','Exam/Quiz Problem'],
                   1565: 					       ['survey','Survey'],
                   1566: 					       ['problem','Homework Problem'] ]
                   1567: 					     ,$token);
                   1568: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1569:     } elsif ($target eq 'modified') {
                   1570: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1571: 						     $safeeval,'mode','for');
                   1572: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1573:     }
                   1574:     return $result;
                   1575: }
                   1576: 
                   1577: sub end_problemtype {
1.159     albertel 1578:     return '';
1.24      albertel 1579: }
1.34      albertel 1580: 
                   1581: sub start_startouttext {
1.159     albertel 1582:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1583:     my @result=(''.'');
                   1584:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
                   1585:     return (@result);
1.34      albertel 1586: }
1.159     albertel 1587: 
1.34      albertel 1588: sub end_startouttext {
1.326     albertel 1589:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1590:     my $result='';
                   1591:     my $text='';
                   1592: 
                   1593:     if ($target eq 'edit') {
1.326     albertel 1594: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.211     albertel 1595: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>
                   1596: <td>".&mt('Delete:').
1.159     albertel 1597:                  &Apache::edit::deletelist($target,$token)
                   1598: 		 ."</td>
1.42      albertel 1599: <td>".
1.159     albertel 1600:                  &Apache::edit::insertlist($target,$token).
                   1601: 		 &Apache::edit::end_row().
                   1602:                  &Apache::edit::start_spanning_row()."\n"
1.188     bowersj2 1603: 		 . &Apache::loncommon::helpLatexCheatsheet () .
1.255     www      1604: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1605:     }
                   1606:     if ($target eq 'modified') {
1.219     albertel 1607: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1608:     }
                   1609:     if ($target eq 'tex') {
                   1610: 	$result .= '\noindent ';
                   1611:     }
                   1612:     return $result;
1.34      albertel 1613: }
1.159     albertel 1614: 
1.34      albertel 1615: sub start_endouttext {
1.159     albertel 1616:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1617:     my $result='';
                   1618:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1619:     if ($target eq "modified") {
                   1620: 	$result='<endouttext />'.
                   1621: 	    &Apache::edit::handle_insertafter('startouttext'); }
                   1622:     return $result;
1.34      albertel 1623: }
1.159     albertel 1624: 
1.34      albertel 1625: sub end_endouttext {
1.159     albertel 1626:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1627:     my @result=('','');
                   1628:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   1629:     return (@result);
1.34      albertel 1630: }
1.159     albertel 1631: 
1.45      albertel 1632: sub delete_startouttext {
1.326     albertel 1633:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1634:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 1635:     my $text=$$parser['-1']->get_text("/endouttext");
                   1636:     my $ntoken=$$parser['-1']->get_token();
                   1637:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   1638:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   1639:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   1640:     # they did the last time round
                   1641:     &Apache::lonxml::increasedepth($ntoken);
                   1642:     &Apache::lonxml::decreasedepth($ntoken);
                   1643:     return 1;
1.193     www      1644: }
                   1645: 
                   1646: sub start_simpleeditbutton {
                   1647:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1648:     my $result='';
1.284     albertel 1649:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 1650: 	($target eq 'web') &&
1.330     albertel 1651:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 1652:         my $url=$env{'request.noversionuri'};
1.193     www      1653:         $url=~s/\?.*$//;
1.278     albertel 1654: 	my ($symb) = &Apache::lonxml::whichuser();
1.194     www      1655: 	$result='<table width="100%" bgcolor="#FFFFAA" border="2"><tr><td>'.
1.356     www      1656:                 '<a href="'.$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      1657: &Apache::loncommon::help_open_topic('Caching').'</td></tr></table><br />';
1.193     www      1658:     }
                   1659:     return $result;
                   1660: }
                   1661: 
                   1662: sub end_simpleeditbutton {
                   1663:     return '';
1.45      albertel 1664: }
1.34      albertel 1665: 
1.1       albertel 1666: 1;
                   1667: __END__

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