Annotation of loncom/homework/structuretags.pm, revision 1.444.4.2.2.1

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.444.4.2.2.1! (www        4:: # $Id: structuretags.pm,v 1.444.4.2 2009/08/14 12:32:04 raeburn 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: 
1.435     jms        30: =pod
                     31: 
                     32: =head1 NAME
                     33: 
                     34: Apache::structuretags
                     35: 
                     36: =head1 SYNOPSIS
                     37: 
                     38: 
                     39: This is part of the LearningOnline Network with CAPA project
                     40: described at http://www.lon-capa.org.
                     41: 
                     42: 
                     43: =head1 NOTABLE SUBROUTINES
                     44: 
                     45: =over
                     46: 
                     47: =item 
                     48: 
                     49: =back
                     50: 
                     51: =cut
                     52: 
1.133     sakharuk   53: 
1.1       albertel   54: package Apache::structuretags; 
                     55: 
                     56: use strict;
                     57: use Apache::lonnet;
1.101     sakharuk   58: use Apache::File();
1.147     www        59: use Apache::lonmenu;
1.210     albertel   60: use Apache::lonlocal;
1.231     sakharuk   61: use Apache::lonxml;
1.434     foxr       62: use Apache::londefdef;
1.338     albertel   63: use Apache::lonenc();
1.267     albertel   64: use Time::HiRes qw( gettimeofday tv_interval );
1.356     www        65: use lib '/home/httpd/lib/perl/';
                     66: use LONCAPA;
                     67:  
1.78      harris41   68: BEGIN {
1.397     albertel   69:     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','translated','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startouttext','endouttext','simpleeditbutton','definetag'));
1.10      albertel   70: }
                     71: 
                     72: sub start_web {
1.326     albertel   73:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.383     albertel   74:     if ($target ne 'edit' && $target ne 'modified') {
                     75: 	my $bodytext=&Apache::lonxml::get_all_text("/web",$parser,$style);
                     76: 	if ($target eq 'web' || $target eq 'webgrade') {
                     77: 	    return $bodytext;
                     78: 	}
                     79:     } elsif ($target eq "edit" ) {
                     80: 	my $bodytext = 
                     81: 	    &Apache::lonxml::get_all_text_unbalanced("/web",$parser);
                     82: 	my $result = &Apache::edit::tag_start($target,$token);
                     83: 	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
                     84: 	return $result;
                     85:     } elsif ( $target eq "modified" ) {
                     86: 	return $token->[4].&Apache::edit::modifiedfield("/web",$parser);
1.159     albertel   87:     }
                     88:     return '';
1.10      albertel   89: }
                     90: 
                     91: sub end_web {
1.44      ng         92:     return '';
1.10      albertel   93: }
                     94: 
                     95: sub start_tex {
1.326     albertel   96:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.198     sakharuk   97:     my $result='';
1.383     albertel   98:     if ($target ne 'edit' && $target ne 'modified') {
                     99: 	my $bodytext=&Apache::lonxml::get_all_text("/tex",$parser,$style);
                    100: 	if ($target eq 'tex') {
1.434     foxr      101: 	    
                    102: 	    # If inside a table, occurrences of \\ must be removed;
                    103: 	    # else the table blows up.
                    104: 
                    105: 	    if (&Apache::londefdef::is_inside_of($tagstack, "table")) {
                    106: 		$bodytext =~ s/\\\\//g;
                    107: 	    }
1.432     foxr      108: 	    return $bodytext.'{}';
1.383     albertel  109: 	}
                    110:     } elsif ($target eq "edit" ) {
                    111: 	my $bodytext = 
                    112: 	    &Apache::lonxml::get_all_text_unbalanced("/tex",$parser);
                    113: 	my $result = &Apache::edit::tag_start($target,$token);
                    114: 	$result .= &Apache::edit::editfield($token->[1],$bodytext,'',80,1);
                    115: 	return $result;
                    116:     } elsif ( $target eq "modified" ) {
                    117: 	return $token->[4].&Apache::edit::modifiedfield("/tex",$parser);
1.159     albertel  118:     }
1.198     sakharuk  119:     return $result;;
1.10      albertel  120: }
                    121: 
                    122: sub end_tex {
1.44      ng        123:     return '';
1.9       albertel  124: }
                    125: 
1.400     albertel  126: sub homework_js {
                    127:     return &Apache::loncommon::resize_textarea_js().
1.416     raeburn   128:            &setmode_javascript().
1.400     albertel  129: 	<<'JS';
                    130: <script type="text/javascript">
                    131: function setSubmittedPart (part) {
                    132:    this.document.lonhomework.submitted.value="part_"+part;
                    133: }
                    134: 
                    135: function image_response_click (which, e) {
                    136:     init_geometry();
                    137:     if (!e) { e = window.event; } //IE
                    138:     var input_element = document.lonhomework.elements[which];
1.401     albertel  139:     var token_element = document.lonhomework.elements[which+'_token'];
1.400     albertel  140:     var token = token_element.value;
1.401     albertel  141:     var img_element   = document.getElementById(which+'_imageresponse');
1.400     albertel  142:     var x= e.clientX-getX(img_element)+Geometry.getHorizontalScroll();
                    143:     var y= e.clientY-getY(img_element)+Geometry.getVerticalScroll();
                    144:     var click = x+':'+y;
                    145:     input_element.value = click;
                    146:     img_element.src = '/adm/randomlabel.png?token='+token+'&clickdata='+click;
                    147: }
1.416     raeburn   148: 
1.400     albertel  149: </script>
                    150: JS
                    151: }
                    152: 
1.416     raeburn   153: sub setmode_javascript {
                    154:     return <<"ENDSCRIPT";
                    155: <script type="text/javascript">
                    156: function setmode(form,probmode) {
                    157:     form.problemmode.value = probmode;
                    158:     form.submit();
                    159: }
                    160: </script>
                    161: ENDSCRIPT
                    162: }
                    163: 
1.48      albertel  164: sub page_start {
1.345     albertel  165:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$name,
                    166: 	$extra_head)=@_;
1.159     albertel  167:     my %found;
1.207     albertel  168:     foreach my $taginside (@$tagstack) {
1.159     albertel  169: 	foreach my $taglookedfor ('html','body','form') {
                    170: 	    if ($taginside =~ /^$taglookedfor$/i) {$found{$taglookedfor} = 1;}
                    171: 	}
                    172:     }
                    173: 
1.343     albertel  174:     if ($target eq 'tex') {
                    175: 	return
                    176: 	    &Apache::londefdef::start_html($target,$token,$tagstack,
                    177: 					   $parstack,$parser,$safeeval);
                    178:     }
                    179: 
1.400     albertel  180:     $extra_head .= &homework_js();
1.374     albertel  181: 
1.434     foxr      182:     if ($env{'environment.wysiwygeditor'} eq 'on') {
                    183: 	$extra_head .= &Apache::lonhtmlcommon::dragmath_js("FCKEditMathPopup");
                    184:     } else {
                    185:         $extra_head .= &Apache::lonhtmlcommon::dragmath_js("EditMathPopup");
1.425     raeburn   186:     }
                    187: 
1.344     albertel  188:     my %body_args;
                    189:     if (defined($found{'html'})) {
                    190: 	$body_args{'skip_phases'}{'head'}=1;
                    191:     } else {
1.343     albertel  192: 	
1.345     albertel  193: 	$extra_head .= &Apache::lonhtmlcommon::spellheader();
1.343     albertel  194: 
1.379     albertel  195: 	$extra_head .= &Apache::londefdef::generate_css_links();
                    196: 
1.384     albertel  197: 	if ($env{'request.state'} eq 'construct') {
1.343     albertel  198: 	    $extra_head.=&Apache::edit::js_change_detection().
                    199: 		"<script type=\"text/javascript\">\n".
                    200: 		"if (typeof swmenu != 'undefined') {swmenu.currentURL=null;}\n".
                    201: 		&Apache::loncommon::browser_and_searcher_javascript().
                    202:                 "\n</script>\n";
                    203: 	}
1.159     albertel  204:     }
1.343     albertel  205: 
1.344     albertel  206:     if (defined($found{'body'})) {
                    207: 	$body_args{'skip_phases'}{'body'}=1;
                    208:     } elsif (!defined($found{'body'}) 
                    209: 	     && $env{'request.state'} eq 'construct') {
1.343     albertel  210: 	if ($target eq 'web' || $target eq 'edit') {
1.402     albertel  211: 	    if ($env{'environment.remote'} ne 'off') {
                    212: 		$body_args{'only_body'}  = 1;
                    213: 	    }
1.297     albertel  214: 	}
1.272     albertel  215:     } elsif (!defined($found{'body'})) {
1.343     albertel  216: 	my %add_entries;
1.159     albertel  217: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    218: 						  $safeeval);
1.343     albertel  219: 	if ($background ne '' ) {
                    220: 	    $add_entries{'background'} = $background;
                    221: 	}
1.344     albertel  222: 
1.290     albertel  223: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    224: 					       $safeeval);
1.344     albertel  225:        	if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
                    226: 
                    227: 	$body_args{'bgcolor'}        = $bgcolor;
                    228: 	$body_args{'no_title'}       = 1;
                    229: 	$body_args{'force_register'} = 1;
                    230: 	$body_args{'add_entries'}    = \%add_entries;	
1.391     albertel  231: 	if ($env{'environment.remote'} eq 'off'
                    232: 	    && $env{'request.state'} eq   'construct') {
                    233: 	    $body_args{'only_body'}  = 1;
                    234: 	}
1.344     albertel  235:     }
1.365     albertel  236:     $body_args{'no_auto_mt_title'} = 1;
1.344     albertel  237:     my $page_start = &Apache::loncommon::start_page($name,$extra_head,
                    238: 						    \%body_args);
                    239: 
1.444.4.2.2.1! (www      240:: #    if (!defined($found{'body'}) 
        !           241:: #	&& $env{'request.state'} ne 'construct'
        !           242:: #	&& ($target eq 'web' || $target eq 'webgrade')) {
        !           243:: #
        !           244:: #	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
        !           245:: #	if ($symb eq '' && !$publicuser) {
        !           246:: #            $page_start .= '<p class="LC_info">'
        !           247:: #                          .&mt('Browsing resource, all submissions are temporary.')
        !           248:: #                          .'</p>';
        !           249:: #       }
        !           250:: #    }
1.344     albertel  251: 
1.409     albertel  252:     if (!defined($found{'body'}) && $env{'request.state'} ne 'construct') {
1.343     albertel  253: 	$page_start .= &Apache::lonxml::message_location();
1.159     albertel  254:     }
1.344     albertel  255:     
1.159     albertel  256:     my $form_tag_start;
                    257:     if (!defined($found{'form'})) {
1.337     albertel  258: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
1.338     albertel  259: 	my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.327     albertel  260: 	$form_tag_start.=$uri.'" ';
                    261: 	if ($target eq 'edit') {
                    262: 	    $form_tag_start.=&Apache::edit::form_change_detection();
                    263: 	}
1.368     albertel  264: 	$form_tag_start.='>'."\n";
1.355     albertel  265: 
                    266: 	my $symb=&Apache::lonnet::symbread();
                    267: 	if ($symb =~ /\S/) {
                    268: 	    $symb=
                    269: 		&HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
                    270: 	    $form_tag_start.=
1.368     albertel  271: 		"\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
1.355     albertel  272: 	}
1.159     albertel  273:     }
1.343     albertel  274:     return ($page_start,$form_tag_start);
1.105     albertel  275: }
                    276: 
1.141     matthew   277: #use Time::HiRes();
1.105     albertel  278: sub get_resource_name {
1.159     albertel  279:     my ($parstack,$safeeval)=@_;
1.388     foxr      280:     my $name;
1.204     albertel  281:     if (defined($Apache::lonhomework::name)) {
1.388     foxr      282: 	$name = $Apache::lonhomework::name;
                    283:     } else {
                    284: 	my ($symb)=&Apache::lonnet::whichuser();
1.392     albertel  285: 	$name=&Apache::lonnet::gettitle($symb);
1.388     foxr      286: 	if ($name eq '') {
                    287: 	    $name=&Apache::lonnet::EXT('resource.title');
                    288: 	    if ($name eq 'con_lost') { $name = ''; }
                    289: 	}
                    290: 	if ($name!~/\S+/) {
                    291: 	    $name=$env{'request.uri'};
                    292: 	    $name=~s-.*/([^/]+)$-$1-;
                    293: 	}
                    294: 	# The name has had html tags escaped:
                    295:        
                    296: 	$name=~s/&lt;/</gs;
                    297: 	$name=~s/&gt;/>/gs;
                    298: 
                    299: 	$Apache::lonhomework::name=$name;
1.204     albertel  300:     }
1.159     albertel  301:     return $name;
1.105     albertel  302: }
                    303: 
                    304: sub setup_rndseed {
1.159     albertel  305:     my ($safeeval)=@_;
                    306:     my $rndseed;
1.367     albertel  307:     my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  308:     if ($env{'request.state'} eq "construct" 
                    309: 	|| $symb eq '' 
                    310: 	|| $Apache::lonhomework::type eq 'practice'
                    311: 	|| $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       312: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  313: 						['rndseed']);
1.284     albertel  314: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  315: 	if (!$rndseed) {
1.162     albertel  316: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    317: 	    if (!$rndseed) {
                    318: 		$rndseed=time;
                    319: 	    }
1.284     albertel  320: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  321: 	}
1.374     albertel  322: 	if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    323: 	      && $env{'form.submitted'} eq 'yes')  ||
1.284     albertel  324: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  325: 	    srand(time);
                    326: 	    $rndseed=int(rand(2100000000));
1.284     albertel  327: 	    $env{'form.rndseed'}=$rndseed;
                    328: 	    delete($env{'form.resetdata'});
                    329: 	    delete($env{'form.newrandomization'});
1.159     albertel  330: 	}
1.187     albertel  331: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
1.307     albertel  332: 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
1.187     albertel  333:         }
1.247     albertel  334:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    335: 	   $rndseed=&Apache::lonnet::rndseed();
                    336: 	}
1.221     albertel  337: 	if ($safeeval) {
                    338: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  339: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  340: 	}
1.159     albertel  341:     }
                    342:     return $rndseed;
1.105     albertel  343: }
                    344: 
1.268     albertel  345: sub remember_problem_state {
                    346:     return '
1.284     albertel  347:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    348:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    349:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  350: }
                    351: 
1.423     www       352: sub problem_edit_buttons {
                    353:    return  '
1.408     albertel  354: <div class="LC_edit_problem_discards">
1.416     raeburn   355:        <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
1.423     www       356:        ' onclick="javscript:setmode(this.form,'."'discard'".')"  />
1.416     raeburn   357:        <input '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'editxml'".')').' type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" />
1.407     albertel  358:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.408     albertel  359: </div>
                    360: <div class="LC_edit_problem_saves">
1.416     raeburn   361:        <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save and Edit').'" />
                    362:        <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
1.423     www       363: </div>';
                    364: }
                    365: 
                    366: sub problem_edit_header {
                    367:     return '<input type="hidden" name="submitted" value="edit" /><input type="hidden" name="problemmode" value="edit" />'.
                    368: 	&Apache::structuretags::remember_problem_state().'
                    369: <div class="LC_edit_problem_header">
                    370: <div class="LC_edit_problem_header_title">
                    371: '.&mt('Problem Editing').&Apache::loncommon::help_open_menu('Problem Editing','Problem_Editor_XML_Index',5,'Authoring').'
                    372: </div>'.
                    373: &problem_edit_buttons().'
1.408     albertel  374: <hr class="LC_edit_problem_divide" />
1.409     albertel  375: '.&Apache::lonxml::message_location().'
1.408     albertel  376: </div>
                    377: '.
1.282     albertel  378:        '<table border="0" width="100%"><tr><td bgcolor="#DDDDDD">';
1.105     albertel  379: }
                    380: 
                    381: sub problem_edit_footer {
1.412     albertel  382:     return '</td></tr></table><br />
                    383: <div class="LC_edit_problem_footer">
1.423     www       384:   <hr class="LC_edit_problem_divide" />'.
                    385: &problem_edit_buttons().'
1.412     albertel  386:   <hr class="LC_edit_problem_divide" />
                    387: </div>
                    388: '.
                    389: 
1.348     albertel  390:     &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields()).
1.342     albertel  391:     "\n</form>\n".&Apache::loncommon::end_page();
1.105     albertel  392: }
                    393: 
1.235     albertel  394: sub option {
                    395:     my ($value,$name) = @_;
                    396:     my $result ="<option value='".$value."' ";
1.284     albertel  397:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  398: 	$result.=" selected='on' ";
                    399:     }
                    400:     $result.='>';
                    401:     return $result;
                    402: }
                    403: 
1.105     albertel  404: sub problem_web_to_edit_header {
1.159     albertel  405:     my ($rndseed)=@_;
1.406     albertel  406:     my $result .= '<div class="LC_edit_problem_header">';
                    407: 
                    408:     if (!$Apache::lonhomework::parsing_a_task) {
                    409: 	$result .= 
                    410: 	    '<div class="LC_edit_problem_header_title">'.
                    411: 	    &mt('Problem Testing').
                    412: 	    &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area').
                    413: 	    '</div>';
                    414:     } else {
                    415: 	$result .= 
                    416: 	    '<div class="LC_edit_problem_header_title">'.
                    417: 	    &mt('Task Testing').
                    418: 	    '</div>';
                    419:     }
                    420:     
1.444.4.1  raeburn   421:     my $show_all_foils_text =
                    422:         ($Apache::lonhomework::parsing_a_task) ?
                    423:         &mt('Show All Instances')
                    424:         : &mt('Show All Foils');
1.315     albertel  425: 
1.444.4.1  raeburn   426:     my $show_all= '<span class="LC_nobreak"><label for="showallfoils">'
                    427:                  .'<input type="checkbox" name="showallfoils"';
1.440     bisitz    428:     if (defined($env{'form.showallfoils'})) { $show_all.=' checked="checked"'; }
1.444.4.1  raeburn   429:     $show_all.= ' /> '.$show_all_foils_text
                    430:                .'</label></span>';
1.406     albertel  431: 
                    432: 
1.384     albertel  433: 
1.406     albertel  434:     $result .= '<div class="LC_edit_problem_header_status_row">';
1.313     albertel  435:     if (!$Apache::lonhomework::parsing_a_task) {
                    436: 	$result.="
1.406     albertel  437: <div class='LC_edit_problem_header_row1'>
                    438: <span class=\"LC_nobreak\">
1.405     albertel  439: ".&mt("Problem Status:")."
1.235     albertel  440: <select name='problemstate'>
1.270     albertel  441:   <option value=''></option>
1.235     albertel  442:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    443:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    444:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    445:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    446:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    447: </select>
1.406     albertel  448: </span>
                    449: <span class=\"LC_nobreak\">
1.405     albertel  450: ".&mt("Problem Type:")."
1.235     albertel  451: <select name='problemtype'>
1.270     albertel  452:   <option value=''></option>
1.242     albertel  453:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
1.428     raeburn   454:   ".&option('problem','problemtype').&mt("Homework Problem")."</option>
1.242     albertel  455:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.428     raeburn   456:   ".&option('practice' ,'problemtype').&mt("Practice Problem")."</option>
1.235     albertel  457: </select>
1.406     albertel  458: </span>
                    459: $show_all
                    460: </div>
                    461: <div class='LC_edit_problem_header_row2'>
                    462: <span class=\"LC_nobreak\">
1.405     albertel  463: ".&mt("Feedback Mode:")."
1.235     albertel  464: <select name='problemstatus'>
                    465:   <option value=''></option>
1.242     albertel  466:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
1.405     albertel  467:   ".&option('no', 'problemstatus').&mt("Don't Show Incorect/Correct Feedback")."</option>
                    468:   ".&option('no_feedback_ever', 'problemstatus').&mt("Don't Show Any Feedback")."</option>
1.235     albertel  469: </select>
1.406     albertel  470: </span>
                    471: ";
                    472: 
1.376     albertel  473:     } elsif ($Apache::lonhomework::parsing_a_task) {
                    474: 	$result.="
1.406     albertel  475: <div class='LC_edit_problem_header_row1'>
                    476: <span class=\"LC_nobreak\">
1.405     albertel  477: ".&mt("Problem Status:")."
1.376     albertel  478: <select name='problemstate'>
                    479:   <option value=''></option>
                    480:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    481:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    482:   ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
                    483:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
                    484: </select>
1.406     albertel  485: </span>
                    486: $show_all
                    487: ";
                    488:     }
                    489:     $result.='
                    490:        <span class="LC_nobreak">
                    491:        '.&mt('Apply style file: ').'
                    492:          <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
                    493:          <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
                    494:        </span>
1.422     www       495:      </div>
                    496:      <div class="LC_edit_problem_header_row1">'.
                    497:        &Apache::lonxml::renderingoptions().'
1.406     albertel  498:      </div>
                    499:      <input type="submit" name="changeproblemmode" value="'.&mt("Change View").'" />
                    500:      <input type="submit" name="clear_style_file" accesskey="d" value="'.&mt('Show Default View').'" />
                    501:      <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
                    502:    </div>
                    503:    <hr class="LC_edit_problem_divide" />
                    504:    <div class="LC_edit_problem_header_randomize_row">
                    505:      <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    506:      <input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
                    507:      <input type="text" name="rndseed" size="10" value="'.
                    508: 	       $rndseed.'"
                    509:              onchange="javascript:document.lonhomework.changerandseed.click()" />';
                    510: 
                    511:     if (!$Apache::lonhomework::parsing_a_task) {
                    512: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    513: 	if (!$numtoanalyze) { $numtoanalyze=20; }
1.408     albertel  514: 	$result .= '<span class="LC_nobreak">'.
                    515: 	    &mt('[_1] for [_2] versions.',
1.416     raeburn   516: 		'<input type="button" name="submitmode" value="'.&mt('Calculate answers').'" '.
1.419     bisitz    517:                 'onclick="javascript:setmode(this.form,'."'calcanswers'".')" />'
                    518:                ,'<input type="text" name="numtoanalyze" value="'.
1.408     albertel  519: 		$numtoanalyze.'" size="5" />').
                    520: 		&Apache::loncommon::help_open_topic("Analyze_Problem",'',undef,undef,300).
                    521: 		'</span>';
                    522: 						    
1.313     albertel  523:     }
1.406     albertel  524: 
                    525:     $result.='
                    526:    </div>
1.408     albertel  527:    <div class="LC_edit_problem_header_edit_row">';
1.416     raeburn   528:     $result.='<input type="hidden" name="problemmode" value="view" />';
                    529:     $result .= '<input type="button" name="submitmode" accesskey="e" value="'.&mt('Edit').'" '.
                    530:                'onclick="javascript:setmode(this.form,'."'edit'".')" />';
                    531:     $result .= '<input type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" '.
                    532:                'onclick="javascript:setmode(this.form,'."'editxml'".')" />';
1.408     albertel  533:     $result.='
                    534:    </div>
1.409     albertel  535:    '.&Apache::lonxml::message_location().'
1.406     albertel  536: </div>';
1.159     albertel  537:     return $result;
1.48      albertel  538: }
                    539: 
1.65      albertel  540: sub initialize_storage {
1.357     albertel  541:     my ($given_symb) = @_;
1.353     albertel  542:     undef(%Apache::lonhomework::results);
                    543:     undef(%Apache::lonhomework::history);
1.357     albertel  544:     my ($symb,$courseid,$domain,$name) = 
1.367     albertel  545: 	&Apache::lonnet::whichuser($given_symb);
1.353     albertel  546:     
                    547:     # anonymous users (CODEd exams) have no data
                    548:     if ($name eq 'anonymous' 
                    549: 	&& !defined($domain)) {
                    550: 	return;
                    551:     }
                    552: 
1.333     albertel  553:     if ($env{'request.state'} eq 'construct' 
                    554: 	|| $symb eq ''
                    555: 	|| $Apache::lonhomework::type eq 'practice') {
                    556: 	
                    557: 	my $namespace = $symb || $env{'request.uri'};
                    558: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
1.374     albertel  559: 	    ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    560: 	     && $env{'form.submitted'} eq 'yes') ||
1.333     albertel  561: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    562: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    563: 	    &Apache::lonxml::debug("Attempt reset");
                    564: 	}
1.159     albertel  565: 	%Apache::lonhomework::history=
1.333     albertel  566: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  567: 	my ($temp)=keys %Apache::lonhomework::history ;
                    568: 	&Apache::lonxml::debug("Return message of $temp");
                    569:     } else {
                    570: 	%Apache::lonhomework::history=
                    571: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    572:     }
1.353     albertel  573: 
1.159     albertel  574:     #ignore error conditions
1.67      albertel  575:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  576:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  577: }
                    578: 
1.435     jms       579: =pod
                    580: 
                    581: =item finalize_storage()
                    582: 
                    583: 	Stores away the result has to a student's environment
                    584: 	checks form.grade_ for specific values, other wises stores
                    585: 	to the running users environment
                    586: 	Will increment totals for attempts, students, and corrects
                    587: 	if running user has student role.
                    588: 	
                    589: =cut
                    590: 
                    591: 
1.65      albertel  592: sub finalize_storage {
1.357     albertel  593:     my ($given_symb) = @_;
1.159     albertel  594:     my $result;
1.289     albertel  595:     if (%Apache::lonhomework::results) {
1.323     albertel  596: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    597: 	delete(@Apache::lonhomework::results{@remove});
1.357     albertel  598: 	my ($symb,$courseid,$domain,$name) = 
1.367     albertel  599: 	    &Apache::lonnet::whichuser($given_symb);
1.333     albertel  600: 	if ($env{'request.state'} eq 'construct' 
                    601: 	    || $symb eq ''
                    602: 	    || $Apache::lonhomework::type eq 'practice') {
                    603: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  604: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  605: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  606: 					      $namespace,'',$domain,$name);
1.159     albertel  607: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    608: 	} else {
                    609: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    610: 					    $symb,$courseid,$domain,$name);
                    611: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.285     raeburn   612:             if ($env{'request.role'} =~/^st/) {
                    613:                 &store_aggregates($symb,$courseid);
                    614:             }
1.159     albertel  615: 	}
1.323     albertel  616:     } else {
                    617: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  618:     }
1.159     albertel  619:     return $result;
1.65      albertel  620: }
                    621: 
1.435     jms       622: =pod
                    623: 
                    624: item store_aggregates()
                    625: 
                    626: 	Sends hash of values to be incremented in nohist_resourcetracker.db
                    627: 	for the course. Increments total number of attempts, unique students 
                    628: 	and corrects for each part for an instance of a problem, as appropriate.
                    629: 	
                    630: =cut
                    631: 
1.285     raeburn   632: sub store_aggregates {
                    633:     my ($symb,$courseid) = @_;
1.286     albertel  634:     my %aggregate;
                    635:     my @parts;
1.288     albertel  636:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    637:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  638:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  639:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  640:             push(@parts, $1);
1.285     raeburn   641:         }
                    642:     }
1.286     albertel  643:     foreach my $part (@parts) {
                    644:         if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    645: 	    eq 'APPROX_ANS' ||
                    646: 	    $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    647: 	    eq 'EXACT_ANS') {
1.287     albertel  648:             $aggregate{$symb."\0".$part."\0correct"} = 1;
1.285     raeburn   649:         }
1.286     albertel  650:         if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
1.287     albertel  651:             $aggregate{$symb."\0".$part."\0users"} = 1;
1.292     raeburn   652:         } else {
1.293     albertel  653:             my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
1.292     raeburn   654:             if ($last_reset) {
1.293     albertel  655:                 if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
1.292     raeburn   656:                     $aggregate{$symb."\0".$part."\0users"} = 1;
                    657:                 }
                    658:             }
1.285     raeburn   659:         }
1.287     albertel  660:         $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   661:     }
1.292     raeburn   662:     if (keys (%aggregate) > 0) {
1.289     albertel  663: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   664:                             $cdomain,$cname);
                    665:     }
                    666: }
1.289     albertel  667: 
1.65      albertel  668: sub checkout_msg {
1.211     albertel  669:     my %lt=&Apache::lonlocal::texthash( 
                    670: 		'resource'=>'The resource needs to be checked out',
                    671: 		'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.',
                    672:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    673:                 'checkout'=>'Check out Exam for Viewing',
                    674: 		'checkout?'=>'Check out Exam?');
1.352     albertel  675:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.159     albertel  676:     return (<<ENDCHECKOUT);
1.211     albertel  677: <h2>$lt{'resource'}</h2>
                    678:     <p>$lt{'id_expln'}</p>
1.444.4.1  raeburn   679: <p class="LC_warning">$lt{'warning'}</p>
1.444     bisitz    680: <form name="checkout" method="post" action="$uri">
1.91      albertel  681: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  682: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  683: </form>
                    684: ENDCHECKOUT
                    685: }
                    686: 
1.252     albertel  687: sub firstaccess_msg {
1.253     albertel  688:     my ($time,$symb)=@_;
1.414     albertel  689:     my $result;
                    690:     my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    691:     if ($interval[1] eq 'map') {
                    692: 	my ($map)=&Apache::lonnet::decode_symb($symb);
                    693: 	my $foldertitle=&Apache::lonnet::gettitle($map);
                    694:     
                    695: 	&Apache::lonxml::debug("map is $map title is $foldertitle");
1.418     bisitz    696: 	$result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    697:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    698:                              ,$foldertitle,$time)."</h2>";
1.414     albertel  699:     } elsif ($interval[1] eq 'course') {
                    700: 	my $course = $env{'course.'.$env{'request.course.id'}.'.description'};
1.418     bisitz    701:         $result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    702:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    703:                              ,$course,$time)."</h2>";
1.414     albertel  704:     } else {
                    705: 	my $title=&Apache::lonnet::gettitle($symb);
1.418     bisitz    706:         $result .= "<h2>".&mt('This resource "[_1]" is open for a limited time.'
                    707:                              .' Once you click the "Show Resource" button below you have [_2] to complete this resource "[_1]".'
                    708:                              ,$title,$time)."</h2>";
1.414     albertel  709:     }
1.352     albertel  710:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.418     bisitz    711:     my $buttontext = &mt('Show Resource');
                    712:     my $timertext = &mt('Start Timer?');
1.414     albertel  713:     $result .= (<<ENDCHECKOUT);
1.444     bisitz    714: <form name="markaccess" method="post" action="$uri">
1.252     albertel  715: <input type="hidden" name="markaccess" value="yes" />
1.418     bisitz    716: <input type="button" name="accessbutton" value="$buttontext" onClick="javascript:if (confirm('$timertext')) { document.markaccess.submit(); }" />
1.252     albertel  717: </form>
                    718: ENDCHECKOUT
1.414     albertel  719:     return $result;
1.252     albertel  720: }
                    721: 
1.204     albertel  722: sub init_problem_globals {
                    723:     my ($type)=@_;
                    724:     #initialize globals
1.308     foxr      725:     #   For problems, we start out in part 0 (outside a <part> tag).
                    726:     #   and part 0 is used to describe the main body of the <problem>
                    727:     #
1.204     albertel  728:     if ($type eq 'problem') {
                    729: 	$Apache::inputtags::part='0';
                    730: 	@Apache::inputtags::partlist=('0');
1.405     albertel  731: 	&Apache::lonhomework::set_show_problem_status(&get_problem_status('0'));
1.266     albertel  732: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      733: 
1.266     albertel  734:     } elsif ($type eq 'library') {
1.204     albertel  735: 	$Apache::inputtags::part='';
                    736: 	@Apache::inputtags::partlist=();
1.405     albertel  737: 	&Apache::lonhomework::reset_show_problem_status();
1.266     albertel  738: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      739: 
1.304     albertel  740:     } elsif ($type eq 'Task') {
                    741: 	$Apache::inputtags::part='0';
                    742: 	@Apache::inputtags::partlist=('0');
1.405     albertel  743: 	&Apache::lonhomework::reset_show_problem_status();
1.304     albertel  744: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  745:     }
                    746:     @Apache::inputtags::responselist = ();
                    747:     @Apache::inputtags::importlist = ();
                    748:     @Apache::inputtags::previous=();
                    749:     @Apache::inputtags::previous_version=();
                    750:     $Apache::structuretags::printanswer='No';
                    751:     @Apache::structuretags::whileconds=();
                    752:     @Apache::structuretags::whilebody=();
                    753:     @Apache::structuretags::whileline=();
                    754:     $Apache::lonhomework::scantronmode=0;
                    755:     undef($Apache::lonhomework::name);
1.358     albertel  756:     undef($Apache::lonhomework::default_type);
                    757:     undef($Apache::lonhomework::type);
1.204     albertel  758: }
                    759: 
                    760: sub reset_problem_globals {
                    761:     my ($type)=@_;
                    762:     undef(%Apache::lonhomework::history);
                    763:     undef(%Apache::lonhomework::results);
                    764:     undef($Apache::inputtags::part);
1.208     albertel  765: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    766: #detect if we try to do 2 problems in one file
                    767: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  768:     undef($Apache::lonhomework::name);
1.358     albertel  769:     undef($Apache::lonhomework::default_type);
                    770:     undef($Apache::lonhomework::type);
                    771:     undef($Apache::lonhomework::scantronmode);
                    772:     undef($Apache::lonhomework::ignore_response_errors);
1.405     albertel  773:     &Apache::lonhomework::reset_show_problem_status();
1.204     albertel  774: }
                    775: 
1.241     albertel  776: sub set_problem_state {
1.240     albertel  777:     my ($part)=@_;
1.284     albertel  778:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  779: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    780: 	    'correct_by_student';
                    781:     }
                    782: }
                    783: 
1.241     albertel  784: sub get_problem_status {
                    785:     my ($part)=@_;
1.267     albertel  786:     my $problem_status;
1.284     albertel  787:     if ($env{'request.state'} eq 'construct' &&
                    788: 	defined($env{'form.problemstatus'})) {
                    789: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  790:     } else {
                    791: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    792: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  793: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  794:     }
                    795:     return $problem_status;
                    796: }
                    797: 
1.9       albertel  798: sub start_problem {
1.326     albertel  799:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel  800: 
1.311     foxr      801:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  802:     if (!$Apache::lonxml::metamode) {
                    803: 	&Apache::lonxml::startredirection();
                    804:     }
1.311     foxr      805: 
1.308     foxr      806:     # Problems don't nest and we don't allow more than one <problem> in
                    807:     # a .problem file.
                    808:     #
1.184     albertel  809:     if ( $Apache::inputtags::part ne '' ||
                    810: 	 $Apache::lonhomework::parsing_a_problem) {
                    811: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel  812: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel  813: 	return '';
                    814:     }
1.184     albertel  815: 
                    816:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  817:     &init_problem_globals('problem');
1.166     albertel  818: 
1.284     albertel  819:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  820: 	$Apache::lonhomework::scantronmode=1;
                    821:     }
1.161     albertel  822: 
1.159     albertel  823:     if ($target ne 'analyze') {
1.415     raeburn   824:         my $type = &Apache::lonnet::EXT('resource.0.type');
                    825: 	$Apache::lonhomework::type=$type;
1.284     albertel  826: 	if (($env{'request.state'} eq 'construct') &&
1.410     albertel  827: 	    $env{'form.problemtype'} =~ /\S/) {
1.284     albertel  828: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  829: 	}
1.332     albertel  830: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  831:     }
1.164     albertel  832:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  833: 	my $uri=$env{'request.uri'};
1.159     albertel  834: 	if ($uri=~/\.(\w+)$/) {
                    835: 	    $Apache::lonhomework::type=$1;
                    836: 	    &Apache::lonxml::debug("Using type of $1");
                    837: 	} else {
                    838: 	    $Apache::lonhomework::type='problem';
                    839: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    840: 	}
1.87      albertel  841:     }
1.301     albertel  842:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       843: 
1.363     albertel  844:     &initialize_storage();
1.389     albertel  845:     if ($target ne 'analyze'
                    846:        	&& $env{'request.state'} eq 'construct') {
                    847: 	&set_problem_state('0');
                    848:     }
                    849: 
1.366     albertel  850:     if ($target eq 'web') {
                    851: 	&Apache::lonxml::debug(" grading history ");
                    852: 	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
                    853:     }
1.363     albertel  854: 
1.159     albertel  855:     #added vars to the scripting enviroment
1.213     albertel  856:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  857:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  858:     &Apache::run::run($expression,$safeeval);
1.159     albertel  859:     my $status;
                    860:     my $accessmsg;
                    861: 
1.343     albertel  862:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel  863:     my ($result,$form_tag_start);
1.354     albertel  864:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
                    865: 	|| $target eq 'edit') {
1.350     albertel  866: 	($result,$form_tag_start) =
                    867: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    868: 			$name);
                    869:     }
                    870: 
1.284     albertel  871:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  872: 
                    873:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    874:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    875: 	$target eq 'tex') {
                    876: 	#handle exam checkout
                    877: 	if ($Apache::lonhomework::type eq 'exam') {
                    878: 	    my $token=
                    879: 		$Apache::lonhomework::history{"resource.0.outtoken"};
1.284     albertel  880: 	    if (($env{'form.doescheckout'}) && (!$token)) {
1.159     albertel  881: 		$token=&Apache::lonxml::maketoken();
                    882: 		$Apache::lonhomework::history{"resource.0.outtoken"}=
                    883: 		    $token;
                    884: 	    }
1.343     albertel  885: 	    $result.=&Apache::lonxml::printtokenheader($target,$token);
1.142     albertel  886: 	}
1.284     albertel  887: 	if ($env{'form.markaccess'}) {
1.414     albertel  888: 	    my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    889: 	    &Apache::lonnet::set_first_access($interval[1]);
1.252     albertel  890: 	}
1.159     albertel  891: 	#handle rand seed in construction space
                    892: 	my $rndseed=&setup_rndseed($safeeval);
1.367     albertel  893: 	my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  894: 	if ($env{'request.state'} ne "construct" && 
                    895: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  896: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
1.444.4.2.2.1! (www      897:: 		$rndseed.'" />';
        !           898:: #.
        !           899:: #		    '<input type="submit" name="resetdata"
        !           900:: #                             value="'.&mt('New Problem Variation').'" />';
1.334     albertel  901: 	    if (exists($env{'form.username'})) {
                    902: 		$form_tag_start.=
1.164     albertel  903: 		    '<input type="hidden" name="username"
1.284     albertel  904:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  905: 	    }
1.444.4.2.2.1! (www      906:: #            if ($env{'request.role.adv'}) {
        !           907:: #                $form_tag_start.= ' <label class="LC_nobreak">'
        !           908:: #                         .'<input type="checkbox" name="showallfoils"';
        !           909:: #                if (defined($env{'form.showallfoils'})) {
        !           910:: #                    $form_tag_start.=' checked="checked"';
        !           911:: #                }
        !           912:: #                $form_tag_start.= ' /> '
        !           913:: #                                 .&mt('Show All Foils')
        !           914:: #                                 .'</label>';
        !           915:: #
        !           916:: #	    }
1.417     www       917:             if ($Apache::lonhomework::type eq 'practice') {
1.428     raeburn   918:                 $form_tag_start.=&practice_problem_header();
1.417     www       919:             }
1.267     albertel  920: 	    $form_tag_start.='<hr />';
1.162     albertel  921: 	}
1.324     albertel  922: 
                    923: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    924: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  925: 	push (@Apache::inputtags::status,$status);
1.324     albertel  926: 
1.159     albertel  927: 	my $expression='$external::datestatus="'.$status.'";';
                    928: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    929: 	&Apache::run::run($expression,$safeeval);
                    930: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  931: 
1.159     albertel  932: 	if (( $status eq 'CLOSED' ) ||
                    933: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  934: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  935: 	    ( $status eq 'BANNED') ||
1.216     albertel  936: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  937: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  938: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  939: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    940: 						       $style);
1.159     albertel  941: 	    if ( $target eq "web" ) {
1.343     albertel  942: 		my $msg;
1.159     albertel  943: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  944: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.441     raeburn   945:                 } elsif ($status eq 'NOT_IN_A_SLOT') {
                    946:                     $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
1.253     albertel  947: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  948: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  949: 		}
1.216     albertel  950: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.393     www       951: 		    $msg.=&mt('The problem ').$accessmsg;
1.159     albertel  952: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel  953: 		    $msg.=&checkout_msg();
1.252     albertel  954: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  955: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  956: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
1.441     raeburn   957: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
1.159     albertel  958: 		}
                    959: 		$result.=$msg.'<br />';
                    960: 	    } elsif ($target eq 'tex') {
1.332     albertel  961: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    962: 		                    : '\begin{minipage}{\textwidth}';
1.443     foxr      963: 		$result.='\noindent \vskip 1 mm '.
1.332     albertel  964: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  965: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  966: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  967: 		} else {
1.211     albertel  968: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  969: 		}
                    970: 	    }
1.324     albertel  971: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  972: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    973: 						       $style);
1.324     albertel  974: 	    if ($target eq 'web') {
1.375     albertel  975: 		$result .= 
                    976: 		    &Apache::bridgetask::proctor_validation_screen($slot);
1.324     albertel  977: 	    } elsif ($target eq 'grade') {
                    978: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                    979: 							'problem');
                    980: 	    }
1.159     albertel  981: 	} elsif ($target eq 'web') {
1.360     albertel  982: 	    if ($status eq 'CAN_ANSWER' 
                    983: 		&& $slot_name ne ''
                    984: 		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
                    985: 		# unproctored slot access, self checkin
                    986: 		&Apache::bridgetask::check_in('problem',undef,undef,
                    987: 					      $slot_name);
                    988: 	    }
1.368     albertel  989: 	    $result.="\n $form_tag_start \t".	
1.227     albertel  990: 	      '<input type="hidden" name="submitted" value="yes" />';
                    991: 	    # create a page header and exit
1.284     albertel  992: 	    if ($env{'request.state'} eq "construct") {
                    993: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.428     raeburn   994:                 if ($Apache::lonhomework::type eq 'practice') {
                    995:                     $result.= '<input type="submit" name="resetdata" '.
                    996:                               'value="'.&mt('New Problem Variation').'" />'.
                    997:                               &practice_problem_header().'<hr />';
                    998:                 }
1.227     albertel  999: 	    }
                   1000: 	    # if we are viewing someone else preserve that info
1.284     albertel 1001: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel 1002: 		foreach my $field ('symb','courseid','domain','username') {
                   1003: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel 1004: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel 1005: 		}
                   1006: 	    }
                   1007: 	} elsif ($target eq 'tex') {
1.319     foxr     1008: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                   1009: 
1.99      sakharuk 1010: 	}
1.159     albertel 1011:     } elsif ($target eq 'edit') {
1.343     albertel 1012: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel 1013: 	$Apache::lonxml::warnings_error_header=
                   1014: 	    &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 1015: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1016: 	$result.=$temp;
                   1017:     } elsif ($target eq 'modified') {
                   1018: 	$result=$token->[4];
                   1019:     } else {
                   1020: 	# page_start returned a starting result, delete it if we don't need it
                   1021: 	$result = '';
1.99      sakharuk 1022:     }
1.159     albertel 1023:     return $result;
1.9       albertel 1024: }
                   1025: 
                   1026: sub end_problem {
1.159     albertel 1027:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel 1028:     my $result;
1.310     foxr     1029: 
1.321     albertel 1030:     if (!$Apache::lonxml::metamode) {
                   1031: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel 1032: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1033:     }
1.319     foxr     1034: 
                   1035:     if ($target eq 'tex') {
1.321     albertel 1036: 	# Figure out the front matter and replace the
                   1037: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                   1038: 	# this in end_problem because whether or not we display due
                   1039: 	# dates depends on whether due dates have already been
                   1040: 	# displayed in the problem parts.
                   1041: 
1.319     foxr     1042: 	my $frontmatter   = '';
                   1043: 	my $startminipage = '';
                   1044: 	if (not $env{'form.problem_split'}=~/yes/) {
                   1045: 	    $startminipage = '\begin{minipage}{\textwidth}';
                   1046: 	}
                   1047: 	my $id = $Apache::inputtags::part;
                   1048: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                   1049: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                   1050: 	my @packages = split /,/,$packages;
                   1051: 	my $allow_print_points = 0;
                   1052: 	foreach my $partial_key (@packages) {
                   1053: 	    if ($partial_key=~m/^part_0$/) {
                   1054: 		$allow_print_points=1;
                   1055: 	    }
                   1056: 	}
                   1057: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1058: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                   1059: 	if (lc($env{'course.'.$env{'request.course.id'}.
                   1060: 			'.disableexampointprint'}) eq 'yes') {
                   1061: 	    $allow_print_points=0;
                   1062: 	}
                   1063: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
1.443     foxr     1064: 	my $begin_doc=' \typeout{STAMPOFPASSEDRESOURCESTART Resource <h2>"'.$name_of_resourse.'"</h2> located in <br /><small><b>'.$env{'request.uri'}.'</b></small><br /> STAMPOFPASSEDRESOURCEEND} \noindent ';
1.319     foxr     1065: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                   1066: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                   1067: 	
                   1068: 	#  Figure out what the due date is and if we need to print
                   1069: 	#  it in the problem header.  We have been logging the
                   1070: 	#  last due date written to file. 
                   1071: 	
1.444.4.1  raeburn  1072: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate");
1.319     foxr     1073: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
1.444.4.1  raeburn  1074:         my $duedate_text = &mt('Due date: [_1]'
                   1075:                               ,&Apache::lonlocal::locallocaltime($duetime));
1.319     foxr     1076: 	my $temp_file;
                   1077: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                   1078: 	
                   1079: 	# Figure out what the last printed due date is or set it
                   1080: 	# to the epoch if no duedates have been printed.
                   1081: 	
                   1082: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                   1083: 	if (-e $filename) {
                   1084: 	    $temp_file = Apache::File->new($filename);
                   1085: 	    my @due_file      = <$temp_file>;
                   1086: 	    $due_file_content = $due_file[$#due_file];
                   1087: 	    chomp $due_file_content;
                   1088: 	} 
                   1089: 	
                   1090: 	# We display the due date iff it is not the same as the last
                   1091: 	# duedate in problem header ($due_file_content), and
                   1092: 	# none of our parts displayed a duedate.
                   1093: 	#
                   1094: 	my $parts_with_displayduedate;
                   1095: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                   1096: 	    $parts_with_displayduedate = 
                   1097: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                   1098: 	} else {
                   1099: 	    $parts_with_displayduedate = 0;
                   1100: 	}
                   1101: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                   1102: 	    $temp_file = Apache::File->new('>'.$filename);
                   1103: 	    print $temp_file "$duetime\n";
                   1104: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1105: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                   1106: 		    $frontmatter .= $begin_doc.
1.444.4.1  raeburn  1107: 			'\textit{'.$duedate_text.'} '.$toc_line;
1.319     foxr     1108: 		} else {
                   1109: 		    $frontmatter.= $begin_doc.$toc_line;
                   1110: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                   1111: 		}
                   1112: 	    } else {
1.444.4.1  raeburn  1113: 		$frontmatter .= '\vskip 1mm\textit{'.$duedate_text.'} \\\\\\\\'.$startminipage;
1.319     foxr     1114: 	    }
                   1115: 	} else {
                   1116: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1117: 		$frontmatter .= $begin_doc.$toc_line;
                   1118: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';}
                   1119: 	    } else {
1.381     albertel 1120: 		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
1.319     foxr     1121: 	    }
                   1122: 	}
                   1123: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                   1124:     }
                   1125: 
1.159     albertel 1126:     my $status=$Apache::inputtags::status['-1'];
                   1127:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                   1128: 	$target eq 'tex') {
1.249     albertel 1129: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel 1130: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel 1131: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                   1132: 		&Apache::inputtags::grade;
1.324     albertel 1133: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                   1134: 		# no need to grade, and don't want to hide data
1.249     albertel 1135: 	    } else {
                   1136: 		# move any submission data to .hidden
                   1137: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1138: 	    }
1.159     albertel 1139: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                   1140: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel 1141: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel 1142: 	    # if part is zero, no <part>s existed, so we need show the current
                   1143: 	    # grading status
                   1144: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                   1145: 	    $result.= $gradestatus;
                   1146: 	}
                   1147: 	if (
1.284     albertel 1148: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel 1149: 	    ($target eq 'answer') || ($target eq 'tex')
                   1150: 	   ) {
1.227     albertel 1151: 	    if ($target ne 'tex' &&
1.284     albertel 1152: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www      1153: 		$result.="</form>";
1.348     albertel 1154: 		$result.= &Apache::lonhtmlcommon::htmlareaselectactive(&Apache::lonhtmlcommon::get_htmlareafields());
1.159     albertel 1155: 	    }
                   1156: 	    if ($target eq 'web') {
1.346     albertel 1157: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1158: 	    } elsif ($target eq 'tex') {
1.178     sakharuk 1159: 		my $endminipage = '';
1.284     albertel 1160: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk 1161: 		    $endminipage = '\end{minipage}';
                   1162: 		}
1.284     albertel 1163:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk 1164: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel 1165: 		} else {
1.262     sakharuk 1166: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel 1167: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk 1168: 			$result .= $endminipage.'\end{document} ';
                   1169: 		    } else {
1.382     albertel 1170: 			$result .= $endminipage;
1.262     sakharuk 1171: 		    }
1.159     albertel 1172: 		}
                   1173: 	    }
                   1174: 	}
                   1175: 	if ($target eq 'grade') {
                   1176: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                   1177: 	    &finalize_storage();
                   1178: 	}
1.284     albertel 1179: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                   1180: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel 1181: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel 1182: 	                        # normally we get it from above, but in CSTR
1.172     albertel 1183: 	                        # we always show answer mode too.
1.159     albertel 1184: 	}
                   1185:     } elsif ($target eq 'meta') {
                   1186: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel 1187: 	    @Apache::inputtags::response=();
1.159     albertel 1188: 	    $result=&Apache::response::mandatory_part_meta;
                   1189: 	}
1.215     albertel 1190: 	$result.=&Apache::response::meta_part_order();
1.258     albertel 1191: 	$result.=&Apache::response::meta_response_order();
1.159     albertel 1192:     } elsif ($target eq 'edit') {
                   1193: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel 1194: 	$result .= &problem_edit_footer();
1.320     albertel 1195:     } elsif ($target eq 'modified') {
                   1196: 	 $result .= $token->[2];
1.159     albertel 1197:     }
1.155     albertel 1198: 
1.284     albertel 1199:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel 1200: 	&Apache::inputtags::check_for_duplicate_ids();
                   1201:     }
1.204     albertel 1202: 
                   1203:     &reset_problem_globals('problem');
1.159     albertel 1204: 
                   1205:     return $result;
1.48      albertel 1206: }
                   1207: 
1.108     albertel 1208: 
1.48      albertel 1209: sub start_library {
1.159     albertel 1210:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel 1211:     my ($result,$form_tag_start);
1.371     albertel 1212:     if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1.244     albertel 1213: 	&init_problem_globals('library');
                   1214: 	$Apache::lonhomework::type='problem';
                   1215:     }
1.159     albertel 1216:     if ($target eq 'edit') {
1.343     albertel 1217: 	($result,$form_tag_start)=
                   1218: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1219: 			'Edit');
                   1220: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel 1221: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1222: 	$result.=$temp;
                   1223:     } elsif ($target eq 'modified') {
                   1224: 	$result=$token->[4];
1.340     albertel 1225:     } elsif (($target eq 'web' || $target eq 'webgrade')
1.371     albertel 1226: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1.340     albertel 1227: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel 1228: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel 1229: 	($result,$form_tag_start)=
                   1230: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1231: 			$name);
1.159     albertel 1232: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel 1233: 	$result.=" \n $form_tag_start".	
1.159     albertel 1234: 		  '<input type="hidden" name="submitted" value="yes" />';
                   1235: 	$result.=&problem_web_to_edit_header($rndseed);
1.428     raeburn  1236:         if ($Apache::lonhomework::type eq 'practice') {
                   1237:             $result.= '<input type="submit" name="resetdata" '.
                   1238:                       'value="'.&mt('New Problem Variation').'" />'.
                   1239:                       &practice_problem_header().'<hr />';
                   1240:         }
1.159     albertel 1241:     }
                   1242:     return $result;
1.48      albertel 1243: }
                   1244: 
                   1245: sub end_library {
1.159     albertel 1246:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1247:     my $result='';
                   1248:     if ($target eq 'edit') {
                   1249: 	$result=&problem_edit_footer();
1.371     albertel 1250:     } elsif ($target eq 'web' 
                   1251: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
                   1252: 	     && $env{'request.state'} eq "construct") {
1.349     albertel 1253: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1254:     }
1.371     albertel 1255:     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
                   1256: 	&reset_problem_globals('library');
                   1257:     }
1.159     albertel 1258:     return $result;
1.197     www      1259: }
                   1260: 
                   1261: sub start_definetag {
1.326     albertel 1262:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      1263: 
                   1264:     my $result;
                   1265: 
                   1266:     my $name = $token->[2]->{'name'};
1.326     albertel 1267:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.396     albertel 1268:     if ($target eq 'web') {
                   1269: 	if ($name=~/^\//) {
                   1270: 	    $result=
                   1271: 		'<br /><table class="LC_sty_end"><tr><th>'.
                   1272: 		&mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1273: 	} else {
                   1274: 	    $result=
                   1275: 		'<br /><table class="LC_sty_begin"><tr><th>'.
                   1276: 		&mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1277: 	}
                   1278: 	$skip = &HTML::Entities::encode($skip, '<>&"');
                   1279: 	$result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
1.197     www      1280:     }
                   1281:     return $result;
                   1282: }
                   1283: 
                   1284: sub end_definetag {
                   1285:     return '';
1.1       albertel 1286: }
                   1287: 
                   1288: sub start_block {
1.201     albertel 1289:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1290: 
                   1291:     my $result;
1.1       albertel 1292: 
1.339     albertel 1293:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1294: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1295: 	my $code = $token->[2]->{'condition'};
1.385     albertel 1296: 	if (defined($code) && $code ne '') {
1.137     albertel 1297: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1298: 		&Apache::lonxml::default_homework_load($safeeval);
                   1299: 	    }
1.131     albertel 1300: 	    $result = &Apache::run::run($code,$safeeval);
                   1301: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1302: 	} else {
                   1303: 	    $result='1';
                   1304: 	}
                   1305: 	if ( ! $result ) {
1.201     albertel 1306: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1307: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1308: 	}
                   1309: 	$result='';
                   1310:     } elsif ($target eq 'edit') {
                   1311: 	$result .=&Apache::edit::tag_start($target,$token);
                   1312: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1313: 					  $token,40);
                   1314: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1315:     } elsif ($target eq 'modified') {
                   1316: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1317: 						     $safeeval,'condition');
                   1318: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1319:     }
1.131     albertel 1320:     return $result;
1.1       albertel 1321: }
                   1322: 
                   1323: sub end_block {
1.167     www      1324:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1325:     my $result;
                   1326:     if ($target eq "edit") {
                   1327: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1328:     }
                   1329:     return $result;
                   1330: }
                   1331: 
                   1332: sub start_languageblock {
1.201     albertel 1333:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1334: 
                   1335:     my $result;
                   1336: 
1.339     albertel 1337:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1338: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1339: 	my $include = $token->[2]->{'include'};
                   1340: 	my $exclude = $token->[2]->{'exclude'};
1.436     raeburn  1341:         my @preferred_languages=&Apache::lonlocal::preferred_languages();
1.394     www      1342: # This should not even happen, since we should at least have the server language
1.398     www      1343:         if (!$preferred_languages[0]) { $preferred_languages[0]='en'; }
                   1344: # Now loop over all languages in order of preference
                   1345:         foreach my $preferred_language (@preferred_languages) {
1.394     www      1346: # If the languageblock has no arguments, show the contents
1.399     www      1347:            $result=1;
                   1348:            my $found=0;
1.394     www      1349: # Do we have an include argument?
1.398     www      1350: 	   if ($include) {
1.394     www      1351: # If include is specified, by default, don't render the block
1.399     www      1352:               $result=0;
1.398     www      1353:               foreach my $included_language (split(/\,/,$include)) {
1.394     www      1354: # ... but if my preferred language is included, render it
1.398     www      1355:                  if ($included_language eq $preferred_language) {
1.399     www      1356:                     $result=1; 
                   1357:                     $found=1; 
1.398     www      1358:                  }
                   1359:               }
                   1360: 	   }
1.394     www      1361: # Do we have an exclude argument?
1.398     www      1362:            if ($exclude) {
1.399     www      1363:               $result=1;
1.398     www      1364:               foreach my $excluded_language (split(/\,/,$exclude)) {
                   1365:                  if ($excluded_language eq $preferred_language) {
1.399     www      1366:                     $result=0;
                   1367:                     $found=1;
1.398     www      1368:                  }
                   1369:               }
                   1370: 	   }
1.399     www      1371:            if ($found) { last; }
1.398     www      1372:         }
1.201     albertel 1373: 	if ( ! $result ) {
                   1374: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1375: 						   $style);
                   1376: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1377: 	}
                   1378: 	$result='';
1.167     www      1379:     } elsif ($target eq 'edit') {
                   1380: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1381: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1382: 					  $token,40);
1.211     albertel 1383: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1384: 					  $token,40);
                   1385: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1386:     } elsif ($target eq 'modified') {
                   1387: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1388: 						     $safeeval,'include',
                   1389: 						     'exclude');
1.167     www      1390: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1391:     }
                   1392:     return $result;
                   1393: }
                   1394: 
                   1395: sub end_languageblock {
1.170     www      1396:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1397:     my $result;
1.201     albertel 1398:     if ($target eq "edit") {
1.170     www      1399: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1400:     }
                   1401:     return $result;
                   1402: }
                   1403: 
1.397     albertel 1404: {
                   1405:     my %available_texts;
                   1406:     sub start_translated {
                   1407: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1408: 	&Apache::lonxml::register('Apache::structuretags',('lang'));
                   1409: 	undef(%available_texts);
                   1410:     }
                   1411:     
                   1412:     sub end_translated {
                   1413: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1414: 	my $result;
                   1415: 	#show the translation on viewable targets
                   1416: 	if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
                   1417: 	    # or non-viewable targets, if it's embedded in something that
                   1418: 	    # wants the output
                   1419: 	    (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
                   1420: 	     && &Apache::lonxml::in_redirection() ) ) {
                   1421: 	    my @possibilities = keys(%available_texts);
                   1422: 	    my $which = 
                   1423: 		&Apache::loncommon::languages(\@possibilities) || 'default';
                   1424: 	    $result = $available_texts{$which};
                   1425: 	}
                   1426: 	undef(%available_texts);
                   1427: 	&Apache::lonxml::deregister('Apache::structuretags',('lang'));
                   1428: 	return $result;
                   1429:     }
                   1430: 
                   1431: 
                   1432:     sub start_lang {
                   1433: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1434: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1435: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1436: 	    &Apache::lonxml::startredirection();
                   1437: 	}
                   1438: 	return '';
                   1439:     }
                   1440: 
                   1441:     sub end_lang {
                   1442: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1443: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1444: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1445: 	    my $result = &Apache::lonxml::endredirection();
                   1446: 	    my $which = &Apache::lonxml::get_param('which',$parstack,
                   1447: 						   $safeeval);
1.431     raeburn  1448:             if ($which=~/\w/) {
                   1449:                 $available_texts{$which} = $result;
                   1450:             }
                   1451:             my $otherlangs = &Apache::lonxml::get_param('other',$parstack,
                   1452:                                                         $safeeval);
                   1453:             foreach my $language (split(/\s*\,\s*/,$otherlangs)) {
                   1454:                 if ($language=~/\w/) {
                   1455:                     $available_texts{$language} = $result;
                   1456:                 }
1.427     bisitz   1457:             }
                   1458: 
1.397     albertel 1459: 	}
                   1460: 	return '';
                   1461:     }
                   1462: }
                   1463: 
1.170     www      1464: sub start_instructorcomment {
1.201     albertel 1465:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1466: 
                   1467:     my $result;
                   1468: 
1.339     albertel 1469:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1470: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.284     albertel 1471:         $result=($env{'request.role'}=~/^(in|cc|au|ca|li)/);
                   1472: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1473: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1474: 						   $parser,$style);
1.170     www      1475: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1476: 	}
                   1477: 	$result='';
                   1478:     } elsif ($target eq 'edit') {
                   1479: 	$result .=&Apache::edit::tag_start($target,$token);
                   1480: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1481:     }
                   1482:     return $result;
                   1483: }
                   1484: 
                   1485: sub end_instructorcomment {
1.159     albertel 1486:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1487:     my $result;
                   1488:     if ($target eq "edit") {
                   1489: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1490:     }
                   1491:     return $result;
1.4       tsai     1492: }
                   1493: 
                   1494: sub start_while {
1.326     albertel 1495:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1496: 
1.160     albertel 1497:     my $result;
1.339     albertel 1498:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1499: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1500: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1501: 
1.160     albertel 1502: 	push( @Apache::structuretags::whileconds, $code);
                   1503: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1504: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1505: 	}
                   1506: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1507: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1508: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1509: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1510: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1511: 	if ( $result ) {
                   1512: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1513: 	}
                   1514:     } elsif ($target eq 'edit') {
                   1515: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1516: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1517: 					  $token,40);
                   1518: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1519:     } elsif ($target eq 'modified') {
                   1520: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1521: 						     $safeeval,'condition');
                   1522: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1523:     }
1.160     albertel 1524:     return $result;
1.4       tsai     1525: }
                   1526: 
                   1527: sub end_while {
1.159     albertel 1528:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1529:     my $result;
                   1530: 
1.339     albertel 1531:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1532: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1533: 	my $code = pop(@Apache::structuretags::whileconds);
                   1534: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1535: 	my $line = pop(@Apache::structuretags::whileline);
                   1536: 	my $return = &Apache::run::run($code,$safeeval);
                   1537: 	my $starttime=time;
                   1538: 	my $error=0;
                   1539: 	while ($return) {
                   1540: 	    if (time-$starttime >
                   1541: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.378     albertel 1542: 		$return = 0; $error=1; next;
1.161     albertel 1543: 	    }
                   1544: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
1.380     albertel 1545: 	    if ($target eq 'grade' || $target eq 'answer' ||
                   1546: 		$target eq 'analyze') {
                   1547: 		# grade/answer/analyze should produce no output but if we
                   1548: 		# are redirecting, the redirecter should know what to do
                   1549: 		# with the output
                   1550: 		if (!$Apache::lonxml::redirection) { undef($result); }
                   1551: 	    }
1.161     albertel 1552: 	    $return = &Apache::run::run($code,$safeeval);
                   1553: 	}
                   1554: 	if ($error) {
1.430     bisitz   1555: 	    &Apache::lonxml::error('<pre>'.&mt('Code ran too long. It ran for more than').' '.$Apache::lonnet::perlvar{'lonScriptTimeout'}.' '.&mt('seconds occurred while running &lt;while&gt; on line').' '.$line.'</pre>');
1.160     albertel 1556: 	}
                   1557:     } elsif ($target eq "edit") {
                   1558: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1559:     }
1.160     albertel 1560:     return $result;
1.1       albertel 1561: }
1.6       tsai     1562: 
1.160     albertel 1563: # <randomlist show="1">
1.6       tsai     1564: #  <tag1>..</tag1>
                   1565: #  <tag2>..</tag2>
                   1566: #  <tag3>..</tag3>
1.160     albertel 1567: #  ...
1.6       tsai     1568: # </randomlist>
                   1569: sub start_randomlist {
1.326     albertel 1570:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1571:     my $result;
1.339     albertel 1572:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1573: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1574: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1575: 	my $b_parser= HTML::LCParser->new(\$body);
                   1576: 	$b_parser->xml_mode(1);
                   1577: 	$b_parser->marked_sections(1);
1.159     albertel 1578: 	my $b_tok;
                   1579: 	my @randomlist;
                   1580: 	my $list_item;
                   1581: 	while($b_tok = $b_parser->get_token() ) {
                   1582: 	    if($b_tok->[0] eq 'S') { # start tag
                   1583: 		# get content of the tag until matching end tag
                   1584: 		# get all text upto the matching tag
                   1585: 		# and push the content into @randomlist
                   1586: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1587: 							   $b_parser);
                   1588: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1589: 		push(@randomlist,$list_item);
                   1590: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1591:                 #         $list_item</b>";
                   1592: 	    }
                   1593: 	    if($b_tok->[0] eq 'T') { # text
                   1594: 		# what to do with text in between tags?
                   1595: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1596: 	    }
                   1597: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1598: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1599: 	    # }
                   1600: 	}
1.303     albertel 1601: 	if (@randomlist) {
                   1602: 	    my @idx_arr = (0 .. $#randomlist);
                   1603: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1604: 	    my $bodytext = '';
                   1605: 	    my $show=$#randomlist;
                   1606: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1607: 	    $showarg--;
                   1608: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
1.439     raeburn  1609:             if (($target eq 'analyze') && ($env{'form.check_parts_withrandomlist'})) {
                   1610:                 my @currlist;
                   1611:                 my $part = $Apache::inputtags::part;
                   1612:                 if ($part ne '') {
                   1613:                     if (ref($Apache::lonhomework::analyze{'parts_withrandomlist'}) eq 'ARRAY') {
                   1614:                         my @currlist = @{$Apache::lonhomework::analyze{'parts_withrandomlist'}};
                   1615:                         if (!(grep(/^\Q$part\E$/,@currlist))) {
                   1616:                             push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1617:                         }
                   1618:                     } else {
                   1619:                         push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1620:                     }
                   1621:                 }
                   1622:             }
1.303     albertel 1623: 	    for(0 .. $show) {
                   1624: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1625: 	    }
                   1626: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1627: 	}
                   1628:     } elsif ($target eq 'edit' ) {
                   1629: 	$result .=&Apache::edit::tag_start($target,$token);
                   1630: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1631: 					   $token,5);
                   1632: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1633:     } elsif ($target eq 'modified' ) {
                   1634: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1635: 						     $safeeval,'show');
                   1636: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1637:     }
                   1638:     return $result;
1.7       tsai     1639: }
                   1640: 
                   1641: sub shuffle {
                   1642:     my $a=shift;
                   1643:     my $i;
1.303     albertel 1644:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1645: 	&Apache::response::pushrandomnumber();
1.159     albertel 1646: 	for($i=@$a;--$i;) {
                   1647: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1648: 	    next if $i == $j;
                   1649: 	    @$a[$i,$j] = @$a[$j,$i];
                   1650: 	}
1.251     albertel 1651: 	&Apache::response::poprandomnumber();
1.7       tsai     1652:     }
1.6       tsai     1653: }
                   1654: 
                   1655: sub end_randomlist {
1.159     albertel 1656:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1657:     my $result;
                   1658:     if ($target eq 'edit' ) {
                   1659: 	$result=&Apache::edit::tag_end($target,$token,
                   1660: 				       'End Randomly Parsed Block');
                   1661:     }
                   1662:     return $result;
1.6       tsai     1663: }
                   1664: 
1.283     albertel 1665: sub ordered_show_check {
                   1666:     my $last_part=$Apache::inputtags::partlist[-2];
                   1667:     my $in_order=
                   1668: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1669:     my $in_order_show=1;
                   1670:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1671: 	$in_order_show=&Apache::response::check_status($last_part);
                   1672:     }
                   1673:     return $in_order_show;
                   1674: }
                   1675: 
1.11      albertel 1676: sub start_part {
1.326     albertel 1677:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1678:     if (!$Apache::lonxml::metamode) {
                   1679: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1680: 	                                     # duedates.
                   1681:     }
1.159     albertel 1682:     my $result='';
1.386     albertel 1683:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
1.159     albertel 1684:     $Apache::inputtags::part=$id;
1.177     albertel 1685:     push(@Apache::inputtags::partlist,$id);
                   1686:     @Apache::inputtags::response=();
1.159     albertel 1687:     @Apache::inputtags::previous=();
                   1688:     @Apache::inputtags::previous_version=();
1.405     albertel 1689:     &Apache::lonhomework::set_show_problem_status(&get_problem_status($id));
1.403     albertel 1690:     &Apache::response::reset_params();
                   1691: 
1.159     albertel 1692:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1693:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1694:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1695:     my $in_order_show=&ordered_show_check();
1.214     albertel 1696:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1697:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1698:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1699: 
                   1700:     if ($target eq 'meta') {
1.224     www      1701: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1702: 	return &Apache::response::mandatory_part_meta.
                   1703: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1704:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1705: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1706: 	if ($hidden || !$in_order_show) {
1.326     albertel 1707: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1708: 	} else {
                   1709: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1710: 	    push (@Apache::inputtags::status,$status);
                   1711: 	    my $expression='$external::datestatus="'.$status.'";';
                   1712: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1713: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1714: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1715: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1716: 	    }
1.216     albertel 1717: 	    if (( $status eq 'CLOSED' ) ||
                   1718: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1719: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1720: 		( $status eq 'BANNED') ||
                   1721: 		( $status eq 'UNAVAILABLE') ||
                   1722: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1723: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1724: 							   $style);
1.159     albertel 1725: 		if ( $target eq "web" ) {
1.211     albertel 1726: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1727: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1728: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1729: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1730: 		    } else {
1.211     albertel 1731: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1732: 		    }
1.159     albertel 1733: 		}
                   1734: 	    } else {
                   1735: 		if ($target eq 'tex') {
1.284     albertel 1736: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1737: 			if ($$tagstack[-2] eq 'td') {
1.388     foxr     1738: 			    $result.='\noindent \begin{minipage}{\textwidth}\noindent';
1.264     sakharuk 1739: 			} else {
                   1740: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1741: 			}
1.195     sakharuk 1742: 		    }
1.159     albertel 1743: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1744: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1745: 		    my @allkeys = split /,/,$allkeys;
                   1746: 		    my $allow_print_points = 0;
                   1747: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1748: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1749: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1750: 			}
                   1751: 		    }
1.275     albertel 1752: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1753: 		    if (defined($maxtries) && $maxtries < 0) {
                   1754: 			$allow_print_points=0;
                   1755: 		    }
1.302     albertel 1756: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1757: 				    '.disableexampointprint'}) eq 'yes') {
                   1758: 			$allow_print_points=0;
                   1759: 		    }
1.222     sakharuk 1760: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { $result .= '\fbox{\textit{'.$weight.' pt}}';}
1.233     www      1761: 		} elsif ($target eq 'web') {
1.356     www      1762: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
1.159     albertel 1763: 		}
                   1764: 	    }
                   1765: 	}
                   1766:     } elsif ($target eq 'edit') {
                   1767: 	$result.=&Apache::edit::tag_start($target,$token);
                   1768: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1769: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1770: 	    '&nbsp;&nbsp;'.
                   1771: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1772: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1773:     } elsif ($target eq 'modified') {
                   1774: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1775: 						     $safeeval,'id','display');
1.159     albertel 1776: 	if ($constructtag) {
1.225     albertel 1777: 	    #limiting ids to only letters numbers, and space
1.224     www      1778: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1779: 	    $result = &Apache::edit::rebuild_tag($token);
                   1780: 	}
                   1781:     }
                   1782:     return $result;
1.11      albertel 1783: }
                   1784: 
                   1785: sub end_part {
1.159     albertel 1786:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1787:     &Apache::lonxml::debug("in end_part $target ");
                   1788:     my $status=$Apache::inputtags::status['-1'];
                   1789:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1790:     my $in_order_show=&ordered_show_check();
1.321     albertel 1791:     my $result;
                   1792:     if (!$Apache::lonxml::metamode) {
                   1793: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1794: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1795:     }
1.312     albertel 1796:     if ($target eq 'grade') {
1.249     albertel 1797: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1798: 	    !$hidden && $in_order_show) {
1.311     foxr     1799: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1800: 	} else {
                   1801: 	    # move any submission data to .hidden
                   1802: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1803: 	}
1.283     albertel 1804:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1805: 	     !$hidden && $in_order_show) {
1.159     albertel 1806: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1807: 							$target);
1.212     albertel 1808: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1809: 	    $gradestatus='';
                   1810: 	}
1.311     foxr     1811: 	$result.=$gradestatus;
1.265     sakharuk 1812: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1813:     } elsif ($target eq 'edit') {
1.311     foxr     1814: 	$result.=&Apache::edit::end_table();
1.322     albertel 1815:     } elsif ($target eq 'modified') {
                   1816: 	 $result .= $token->[2];
1.159     albertel 1817:     }
                   1818:     pop @Apache::inputtags::status;
                   1819:     $Apache::inputtags::part='';
1.295     albertel 1820:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1821:     return $result;
1.11      albertel 1822: }
1.1       albertel 1823: 
1.25      albertel 1824: sub start_preduedate {
1.326     albertel 1825:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1826:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1827: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1828: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1829: 	if (!$Apache::lonhomework::scantronmode &&
                   1830: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1831: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1832: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1833: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1834: 	}
1.24      albertel 1835:     }
1.159     albertel 1836:     return '';
1.24      albertel 1837: }
                   1838: 
1.25      albertel 1839: sub end_preduedate {
1.159     albertel 1840:     return '';
1.24      albertel 1841: }
                   1842: 
1.369     foxr     1843: # In all the modes where <postanswerdate> text is 
                   1844: # displayable,  all we do is eat up the text between the start/stop
                   1845: # tags if the conditions are not right to display it.
1.25      albertel 1846: sub start_postanswerdate {
1.326     albertel 1847:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.370     foxr     1848:     my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
                   1849: 	&Apache::lonnet::allowed('pav',
                   1850: 			   $env{'request.course.id'}.'/'.$env{'request.course.sec'});
1.369     foxr     1851:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
1.370     foxr     1852: 	$target eq 'tex' ) {
1.300     albertel 1853: 	if ($Apache::lonhomework::scantronmode ||
1.370     foxr     1854: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
                   1855: 	    (($target eq 'tex') && !$pav)) {
1.326     albertel 1856: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1857: 	}
                   1858:     }
                   1859:     return '';
1.24      albertel 1860: }
                   1861: 
1.25      albertel 1862: sub end_postanswerdate {
1.159     albertel 1863:     return '';
1.24      albertel 1864: }
                   1865: 
1.25      albertel 1866: sub start_notsolved {
1.326     albertel 1867:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1868:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1869: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1870: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1871: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1872: 	if ($gradestatus =~ /^correct/ &&
                   1873: 	    &Apache::response::show_answer()) {
1.159     albertel 1874: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1875: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1876: 	}
1.24      albertel 1877:     }
1.159     albertel 1878:     return '';
1.24      albertel 1879: }
                   1880: 
1.25      albertel 1881: sub end_notsolved {
1.159     albertel 1882:     return '';
1.24      albertel 1883: }
                   1884: 
                   1885: sub start_solved {
1.326     albertel 1886:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1887:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1888: 	$target eq 'tex') {
                   1889: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1890: 	if ($gradestatus !~ /^correct/ ||
                   1891: 	    !&Apache::response::show_answer()) {
1.326     albertel 1892: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1893: 	}
1.24      albertel 1894:     }
1.159     albertel 1895:     return '';
1.24      albertel 1896: }
                   1897: 
                   1898: sub end_solved {
1.248     albertel 1899:     return '';
                   1900: }
                   1901: 
                   1902: sub start_problemtype {
1.326     albertel 1903:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1904:     my $result;
1.339     albertel 1905:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1906: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1907: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1908: 	if (!defined($mode)) { $mode='show'; }
                   1909: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1910: 	my $found=0;
                   1911: 	foreach my $type (split(',',$for)) {
                   1912: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1913: 	}
                   1914: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1915: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1916: 	}
                   1917: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1918: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1919: 	}
                   1920:     } elsif ($target eq 'edit') {
                   1921: 	$result .=&Apache::edit::tag_start($target,$token);
                   1922: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1923: 					   [['show','Show'],
                   1924: 					    ['hide','Hide']]
                   1925: 					   ,$token);
                   1926: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   1927: 					     [ ['exam','Exam/Quiz Problem'],
                   1928: 					       ['survey','Survey'],
1.428     raeburn  1929: 					       ['problem','Homework Problem'],
                   1930:                                                ['practice','Practice Problem'] ]
1.248     albertel 1931: 					     ,$token);
                   1932: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1933:     } elsif ($target eq 'modified') {
                   1934: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1935: 						     $safeeval,'mode','for');
                   1936: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1937:     }
                   1938:     return $result;
                   1939: }
                   1940: 
                   1941: sub end_problemtype {
1.159     albertel 1942:     return '';
1.24      albertel 1943: }
1.34      albertel 1944: 
                   1945: sub start_startouttext {
1.159     albertel 1946:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1947:     my @result=(''.'');
                   1948:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1.404     albertel 1949:     
                   1950:     my $nesting = 
                   1951: 	&Apache::lonxml::set_state('outtext',
                   1952: 				   &Apache::lonxml::get_state('outtext')+1);
                   1953:     if ($nesting > 1 && $env{'request.state'} eq 'construct') {
                   1954: 	&Apache::lonxml::error("Nesting of &lt;startouttext /&gt; not allowed, on line ".$token->[5]);
                   1955:     }
1.159     albertel 1956:     return (@result);
1.34      albertel 1957: }
1.159     albertel 1958: 
1.34      albertel 1959: sub end_startouttext {
1.326     albertel 1960:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1961:     my $result='';
                   1962:     my $text='';
                   1963:     if ($target eq 'edit') {
1.424     foxr     1964: 	my $areaid = 'homework_edit_'.$Apache::lonxml::curdepth;
1.326     albertel 1965: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.437     raeburn  1966: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>"
1.438     bisitz   1967:                  .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.437     raeburn  1968:                  .&Apache::edit::deletelist($target,$token)
                   1969:                  .'</span></td>';
1.425     raeburn  1970:         unless ($env{'environment.wysiwygeditor'} eq 'on') {
1.434     foxr     1971: 	    $result .= '<td align="left">'
                   1972: 		.&Apache::lonhtmlcommon::dragmath_button($areaid,1)
                   1973: 		.'</td>'
                   1974: 		.'<td>'
                   1975: 		.&Apache::edit::insertlist($target,$token)
                   1976: 		.'</td>';
                   1977: 	}
1.425     raeburn  1978: 	$result.='<td align="right" valign="top">' .
1.434     foxr     1979: 	    &Apache::loncommon::helpLatexCheatsheet().
1.159     albertel 1980: 		 &Apache::edit::end_row().
1.362     albertel 1981:                  &Apache::edit::start_spanning_row()."\n".
1.255     www      1982: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 1983:     }
                   1984:     if ($target eq 'modified') {
1.219     albertel 1985: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 1986:     }
                   1987:     if ($target eq 'tex') {
                   1988: 	$result .= '\noindent ';
                   1989:     }
                   1990:     return $result;
1.34      albertel 1991: }
1.159     albertel 1992: 
1.34      albertel 1993: sub start_endouttext {
1.159     albertel 1994:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1995:     my $result='';
                   1996:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   1997:     if ($target eq "modified") {
                   1998: 	$result='<endouttext />'.
1.377     albertel 1999: 	    &Apache::edit::handle_insertafter('startouttext');
                   2000:     }
1.404     albertel 2001: 
                   2002:     my $nesting = 
                   2003: 	&Apache::lonxml::set_state('outtext',
                   2004: 				   &Apache::lonxml::get_state('outtext')-1);
                   2005:     if ($nesting < 0 && $env{'request.state'} eq 'construct') {
                   2006: 	&Apache::lonxml::error(" Extraneous &lt;endouttext /&gt; not allowed on line ".$token->[5]);
                   2007: 	&Apache::lonxml::set_state('outtext', 0);
                   2008:     }
1.159     albertel 2009:     return $result;
1.34      albertel 2010: }
1.159     albertel 2011: 
1.34      albertel 2012: sub end_endouttext {
1.159     albertel 2013:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2014:     my @result=('','');
                   2015:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   2016:     return (@result);
1.34      albertel 2017: }
1.159     albertel 2018: 
1.45      albertel 2019: sub delete_startouttext {
1.326     albertel 2020:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2021:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 2022:     my $text=$$parser['-1']->get_text("/endouttext");
                   2023:     my $ntoken=$$parser['-1']->get_token();
                   2024:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   2025:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   2026:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   2027:     # they did the last time round
                   2028:     &Apache::lonxml::increasedepth($ntoken);
                   2029:     &Apache::lonxml::decreasedepth($ntoken);
                   2030:     return 1;
1.193     www      2031: }
                   2032: 
                   2033: sub start_simpleeditbutton {
                   2034:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2035:     my $result='';
1.284     albertel 2036:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 2037: 	($target eq 'web') &&
1.330     albertel 2038:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 2039:         my $url=$env{'request.noversionuri'};
1.193     www      2040:         $url=~s/\?.*$//;
1.367     albertel 2041: 	my ($symb) = &Apache::lonnet::whichuser();
1.442     bisitz   2042: #       Warning make more sense and is more important on edit screen
                   2043: #       $result='<p class="LC_warning">'
                   2044: #              .&mt('Note: it can take up to 10 minutes for changes to take effect for all users.')
                   2045: #              .&Apache::loncommon::help_open_topic('Caching')
                   2046: #              .'</p>';
                   2047:         $result.=&Apache::lontemplate::start_functionslist()
                   2048:                 .&Apache::lontemplate::item_functionslist(
                   2049:                      '<a href="'.$url.'/smpedit?symb='.&escape($symb).'">'.&mt('Edit').'</a>')
                   2050:                 .&Apache::lontemplate::end_functionslist();
                   2051: 
1.193     www      2052:     }
                   2053:     return $result;
                   2054: }
                   2055: 
                   2056: sub end_simpleeditbutton {
                   2057:     return '';
1.45      albertel 2058: }
1.34      albertel 2059: 
1.428     raeburn  2060: sub practice_problem_header {
                   2061:     return '<span class="LC_info"><h3>'.&mt('Practice Problem').'</h3></span>'.
                   2062:            '<span class="LC_info">'.&mt('Submissions are not permanently recorded').
                   2063:            '</span>';
                   2064: }
                   2065: 
1.1       albertel 2066: 1;
                   2067: __END__
1.435     jms      2068: 
                   2069: =pod
                   2070: 
                   2071: =back
                   2072: 
                   2073: =cut

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