Annotation of loncom/homework/structuretags.pm, revision 1.473

1.34      albertel    1: # The LearningOnline Network with CAPA 
                      2: # definition of tags that give a structure to a document
1.74      albertel    3: #
1.473   ! raeburn     4: # $Id: structuretags.pm,v 1.472 2010/08/01 03:57:27 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 {
1.469     www        69:     &Apache::lonxml::register('Apache::structuretags',('block','languageblock','translated','instructorcomment','while','randomlist','problem','library','web','tex','part','preduedate','postanswerdate','solved','notsolved','problemtype','startpartmarker','startouttext','endpartmarker','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: 
1.446     bisitz    206:     my $pageheader = '';
1.344     albertel  207:     if (defined($found{'body'})) {
                    208: 	$body_args{'skip_phases'}{'body'}=1;
                    209:     } elsif (!defined($found{'body'}) 
                    210: 	     && $env{'request.state'} eq 'construct') {
1.343     albertel  211: 	if ($target eq 'web' || $target eq 'edit') {
1.450     bisitz    212:         # Breadcrumbs for Construction Space
                    213:         &Apache::lonhtmlcommon::clear_breadcrumbs();
                    214:         &Apache::lonhtmlcommon::add_breadcrumb({
                    215:             'text'  => 'Construction Space',
                    216:             'href'  => &Apache::loncommon::authorspace(),
                    217:         });
1.460     droeschl  218:         # breadcrumbs (and tools) will be created 
                    219:         # in start_page->bodytag->innerregister
                    220: 
1.450     bisitz    221: # FIXME Where are we?
                    222: #        &Apache::lonhtmlcommon::add_breadcrumb({
                    223: #            'text'  => 'Problem Editing', # 'Problem Testing'
                    224: #            'href'  => '',
                    225: #        });
1.460     droeschl  226:         $pageheader =&Apache::loncommon::head_subbox(
1.446     bisitz    227:                 &Apache::loncommon::CSTR_pageheader());
1.297     albertel  228: 	}
1.272     albertel  229:     } elsif (!defined($found{'body'})) {
1.343     albertel  230: 	my %add_entries;
1.159     albertel  231: 	my $background=&Apache::lonxml::get_param('background',$parstack,
                    232: 						  $safeeval);
1.343     albertel  233: 	if ($background ne '' ) {
                    234: 	    $add_entries{'background'} = $background;
                    235: 	}
1.344     albertel  236: 
1.290     albertel  237: 	my $bgcolor=&Apache::lonxml::get_param('bgcolor',$parstack,
                    238: 					       $safeeval);
1.446     bisitz    239:         if ($bgcolor eq '' ) { $bgcolor = '#FFFFFF'; }
1.344     albertel  240: 
1.446     bisitz    241:         $body_args{'bgcolor'}        = $bgcolor;
                    242:         # $body_args{'no_title'}       = 1;
                    243:         $body_args{'force_register'} = 1;
                    244:         $body_args{'add_entries'}    = \%add_entries;
1.466     droeschl  245:         if ( $env{'request.state'} eq   'construct') {
1.446     bisitz    246:             $body_args{'only_body'}  = 1;
                    247:         }
1.344     albertel  248:     }
1.365     albertel  249:     $body_args{'no_auto_mt_title'} = 1;
1.344     albertel  250:     my $page_start = &Apache::loncommon::start_page($name,$extra_head,
                    251: 						    \%body_args);
1.446     bisitz    252:     $page_start .= $pageheader;
1.462     raeburn   253:     if (!defined($found{'body'}) 
                    254: 	&& $env{'request.state'} ne 'construct'
                    255: 	&& ($target eq 'web' || $target eq 'webgrade')) {
                    256: 
                    257: 	my ($symb,undef,undef,undef,$publicuser)= &Apache::lonnet::whichuser();
                    258:         if ($symb eq '' && !$publicuser) {
                    259:             $page_start .= '<p class="LC_info">'
                    260:                           .&mt('Browsing resource, all submissions are temporary.')
                    261:                           .'</p>';
1.457     bisitz    262:         }
1.344     albertel  263:     }
                    264: 
1.409     albertel  265:     if (!defined($found{'body'}) && $env{'request.state'} ne 'construct') {
1.343     albertel  266: 	$page_start .= &Apache::lonxml::message_location();
1.159     albertel  267:     }
1.344     albertel  268:     
1.159     albertel  269:     my $form_tag_start;
                    270:     if (!defined($found{'form'})) {
1.337     albertel  271: 	$form_tag_start='<form name="lonhomework" enctype="multipart/form-data" method="post" action="';
1.465     raeburn   272: 	my $uri = &Apache::loncommon::inhibit_menu_check(
1.455     droeschl  273:                 &Apache::lonenc::check_encrypt($env{'request.uri'}));
1.464     raeburn   274:         $uri = &HTML::Entities::encode($uri,'<>&"');
1.327     albertel  275: 	$form_tag_start.=$uri.'" ';
                    276: 	if ($target eq 'edit') {
                    277: 	    $form_tag_start.=&Apache::edit::form_change_detection();
                    278: 	}
1.368     albertel  279: 	$form_tag_start.='>'."\n";
1.355     albertel  280: 
                    281: 	my $symb=&Apache::lonnet::symbread();
                    282: 	if ($symb =~ /\S/) {
                    283: 	    $symb=
                    284: 		&HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
                    285: 	    $form_tag_start.=
1.368     albertel  286: 		"\t".'<input type="hidden" name="symb" value="'.$symb.'" />'."\n";
1.355     albertel  287: 	}
1.159     albertel  288:     }
1.343     albertel  289:     return ($page_start,$form_tag_start);
1.105     albertel  290: }
                    291: 
1.141     matthew   292: #use Time::HiRes();
1.105     albertel  293: sub get_resource_name {
1.159     albertel  294:     my ($parstack,$safeeval)=@_;
1.388     foxr      295:     my $name;
1.204     albertel  296:     if (defined($Apache::lonhomework::name)) {
1.388     foxr      297: 	$name = $Apache::lonhomework::name;
                    298:     } else {
                    299: 	my ($symb)=&Apache::lonnet::whichuser();
1.392     albertel  300: 	$name=&Apache::lonnet::gettitle($symb);
1.388     foxr      301: 	if ($name eq '') {
                    302: 	    $name=&Apache::lonnet::EXT('resource.title');
                    303: 	    if ($name eq 'con_lost') { $name = ''; }
                    304: 	}
                    305: 	if ($name!~/\S+/) {
                    306: 	    $name=$env{'request.uri'};
                    307: 	    $name=~s-.*/([^/]+)$-$1-;
                    308: 	}
                    309: 	# The name has had html tags escaped:
                    310:        
                    311: 	$name=~s/&lt;/</gs;
                    312: 	$name=~s/&gt;/>/gs;
                    313: 
                    314: 	$Apache::lonhomework::name=$name;
1.204     albertel  315:     }
1.159     albertel  316:     return $name;
1.105     albertel  317: }
                    318: 
                    319: sub setup_rndseed {
1.159     albertel  320:     my ($safeeval)=@_;
                    321:     my $rndseed;
1.367     albertel  322:     my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  323:     if ($env{'request.state'} eq "construct" 
                    324: 	|| $symb eq '' 
                    325: 	|| $Apache::lonhomework::type eq 'practice'
                    326: 	|| $Apache::lonhomework::history{'resource.CODE'}) {
1.316     www       327: 	&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
1.317     albertel  328: 						['rndseed']);
1.284     albertel  329: 	$rndseed=$env{'form.rndseed'};
1.159     albertel  330: 	if (!$rndseed) {
1.162     albertel  331: 	    $rndseed=$Apache::lonhomework::history{'rndseed'};
                    332: 	    if (!$rndseed) {
                    333: 		$rndseed=time;
                    334: 	    }
1.284     albertel  335: 	    $env{'form.rndseed'}=$rndseed;
1.162     albertel  336: 	}
1.374     albertel  337: 	if ( ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    338: 	      && $env{'form.submitted'} eq 'yes')  ||
1.284     albertel  339: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
1.190     albertel  340: 	    srand(time);
                    341: 	    $rndseed=int(rand(2100000000));
1.284     albertel  342: 	    $env{'form.rndseed'}=$rndseed;
                    343: 	    delete($env{'form.resetdata'});
                    344: 	    delete($env{'form.newrandomization'});
1.159     albertel  345: 	}
1.187     albertel  346: 	if (defined($rndseed) && $rndseed ne int($rndseed)) {
1.307     albertel  347: 	    $rndseed=join(':',&Apache::lonnet::digest($rndseed));
1.187     albertel  348:         }
1.247     albertel  349:         if ($Apache::lonhomework::history{'resource.CODE'}) {
                    350: 	   $rndseed=&Apache::lonnet::rndseed();
                    351: 	}
1.221     albertel  352: 	if ($safeeval) {
                    353: 	    &Apache::lonxml::debug("Setting rndseed to $rndseed");
1.250     albertel  354: 	    &Apache::run::run('$external::randomseed="'.$rndseed.'";',$safeeval);
1.221     albertel  355: 	}
1.159     albertel  356:     }
                    357:     return $rndseed;
1.105     albertel  358: }
                    359: 
1.268     albertel  360: sub remember_problem_state {
                    361:     return '
1.284     albertel  362:        <input type="hidden" name="problemstate" value="'.$env{'form.problemstate'}.'" />
                    363:        <input type="hidden" name="problemtype" value="'.$env{'form.problemtype'}.'" />
                    364:        <input type="hidden" name="problemstatus" value="'.$env{'form.problemstatus'}.'" />';
1.268     albertel  365: }
                    366: 
1.423     www       367: sub problem_edit_buttons {
                    368:    return  '
1.408     albertel  369: <div class="LC_edit_problem_discards">
1.416     raeburn   370:        <input type="button" name="submitmode" accesskey="d" value="'.&mt('Discard Edits and View').'" '.
1.423     www       371:        ' onclick="javscript:setmode(this.form,'."'discard'".')"  />
1.416     raeburn   372:        <input '.&Apache::edit::submit_ask_anyway('setmode(this.form,'."'editxml'".')').' type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" />
1.407     albertel  373:        <input type="submit" name="Undo" accesskey="u" value="'.&mt('undo').'" />
1.408     albertel  374: </div>
                    375: <div class="LC_edit_problem_saves">
1.416     raeburn   376:        <input type="submit" name="submitbutton" accesskey="s" value="'.&mt('Save and Edit').'" />
                    377:        <input type="submit" name="submitbutton" accesskey="v" value="'.&mt('Save and View').'" />
1.423     www       378: </div>';
                    379: }
                    380: 
                    381: sub problem_edit_header {
                    382:     return '<input type="hidden" name="submitted" value="edit" /><input type="hidden" name="problemmode" value="edit" />'.
                    383: 	&Apache::structuretags::remember_problem_state().'
                    384: <div class="LC_edit_problem_header">
                    385: <div class="LC_edit_problem_header_title">
                    386: '.&mt('Problem Editing').&Apache::loncommon::help_open_menu('Problem Editing','Problem_Editor_XML_Index',5,'Authoring').'
                    387: </div>'.
                    388: &problem_edit_buttons().'
1.459     bisitz    389: <hr style="clear:both;" />
1.409     albertel  390: '.&Apache::lonxml::message_location().'
1.408     albertel  391: </div>
                    392: '.
1.458     bisitz    393:        '<table border="0" width="100%"><tr><td bgcolor="#F8F8F8">';
1.105     albertel  394: }
                    395: 
                    396: sub problem_edit_footer {
1.412     albertel  397:     return '</td></tr></table><br />
                    398: <div class="LC_edit_problem_footer">
1.453     bisitz    399:   <hr />'.
1.423     www       400: &problem_edit_buttons().'
1.459     bisitz    401:   <hr style="clear:both;" />
1.412     albertel  402: </div>
                    403: '.
1.342     albertel  404:     "\n</form>\n".&Apache::loncommon::end_page();
1.105     albertel  405: }
                    406: 
1.235     albertel  407: sub option {
                    408:     my ($value,$name) = @_;
                    409:     my $result ="<option value='".$value."' ";
1.284     albertel  410:     if ($env{'form.'.$name} eq $value) {
1.235     albertel  411: 	$result.=" selected='on' ";
                    412:     }
                    413:     $result.='>';
                    414:     return $result;
                    415: }
                    416: 
1.105     albertel  417: sub problem_web_to_edit_header {
1.159     albertel  418:     my ($rndseed)=@_;
1.406     albertel  419:     my $result .= '<div class="LC_edit_problem_header">';
                    420: 
                    421:     if (!$Apache::lonhomework::parsing_a_task) {
                    422: 	$result .= 
                    423: 	    '<div class="LC_edit_problem_header_title">'.
                    424: 	    &mt('Problem Testing').
                    425: 	    &Apache::loncommon::help_open_topic('Problem_Editor_Testing_Area').
                    426: 	    '</div>';
                    427:     } else {
                    428: 	$result .= 
                    429: 	    '<div class="LC_edit_problem_header_title">'.
                    430: 	    &mt('Task Testing').
                    431: 	    '</div>';
                    432:     }
                    433:     
1.315     albertel  434:     my $show_all_foils_text = 
                    435: 	($Apache::lonhomework::parsing_a_task) ?
1.452     bisitz    436: 	&mt('Show All Instances')
                    437: 	: &mt('Show All Foils');
1.315     albertel  438: 
1.452     bisitz    439:     my $show_all= '<span class="LC_nobreak"><label for="showallfoils">'
                    440:                  .'<input type="checkbox" name="showallfoils"';
1.440     bisitz    441:     if (defined($env{'form.showallfoils'})) { $show_all.=' checked="checked"'; }
1.452     bisitz    442:     $show_all.= ' /> '.$show_all_foils_text
                    443:                .'</label></span>';
1.406     albertel  444: 
                    445: 
1.384     albertel  446: 
1.406     albertel  447:     $result .= '<div class="LC_edit_problem_header_status_row">';
1.313     albertel  448:     if (!$Apache::lonhomework::parsing_a_task) {
                    449: 	$result.="
1.406     albertel  450: <div class='LC_edit_problem_header_row1'>
                    451: <span class=\"LC_nobreak\">
1.405     albertel  452: ".&mt("Problem Status:")."
1.235     albertel  453: <select name='problemstate'>
1.270     albertel  454:   <option value=''></option>
1.235     albertel  455:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    456:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    457:   ".&option('CANNOT_ANSWER_tries'  ,'problemstate').&mt("Open with full tries")."</option>
                    458:   ".&option('CANNOT_ANSWER_correct','problemstate').&mt("Open and correct")."</option>
                    459:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Answer")."</option>
                    460: </select>
1.406     albertel  461: </span>
                    462: <span class=\"LC_nobreak\">
1.405     albertel  463: ".&mt("Problem Type:")."
1.235     albertel  464: <select name='problemtype'>
1.270     albertel  465:   <option value=''></option>
1.242     albertel  466:   ".&option('exam'   ,'problemtype').&mt("Exam Problem")."</option>
1.428     raeburn   467:   ".&option('problem','problemtype').&mt("Homework Problem")."</option>
1.242     albertel  468:   ".&option('survey' ,'problemtype').&mt("Survey Question")."</option>
1.465     raeburn   469:   ".&option('surveycred' ,'problemtype').&mt("Survey Question (with credit)")."</option>
                    470:   ".&option('anonsurvey' ,'problemtype').&mt("Anonymous Survey Question")."</option>
                    471:   ".&option('anonsurveycred' ,'problemtype').&mt("Anonymous Survey Question (with credit)")."</option>
1.428     raeburn   472:   ".&option('practice' ,'problemtype').&mt("Practice Problem")."</option>
1.235     albertel  473: </select>
1.406     albertel  474: </span>
                    475: $show_all
                    476: </div>
                    477: <div class='LC_edit_problem_header_row2'>
                    478: <span class=\"LC_nobreak\">
1.405     albertel  479: ".&mt("Feedback Mode:")."
1.235     albertel  480: <select name='problemstatus'>
                    481:   <option value=''></option>
1.242     albertel  482:   ".&option('yes','problemstatus').&mt("Show Feedback")."</option>
1.405     albertel  483:   ".&option('no', 'problemstatus').&mt("Don't Show Incorect/Correct Feedback")."</option>
                    484:   ".&option('no_feedback_ever', 'problemstatus').&mt("Don't Show Any Feedback")."</option>
1.235     albertel  485: </select>
1.406     albertel  486: </span>
                    487: ";
                    488: 
1.376     albertel  489:     } elsif ($Apache::lonhomework::parsing_a_task) {
                    490: 	$result.="
1.406     albertel  491: <div class='LC_edit_problem_header_row1'>
                    492: <span class=\"LC_nobreak\">
1.405     albertel  493: ".&mt("Problem Status:")."
1.376     albertel  494: <select name='problemstate'>
                    495:   <option value=''></option>
                    496:   ".&option('CLOSED'               ,'problemstate').&mt("Closed")."</option>
                    497:   ".&option('CAN_ANSWER'           ,'problemstate').&mt("Answerable")."</option>
                    498:   ".&option('WEB_GRADE'            ,'problemstate').&mt("Criteria Grading")."</option>
                    499:   ".&option('SHOW_ANSWER'          ,'problemstate').&mt("Show Feedback")."</option>
                    500: </select>
1.406     albertel  501: </span>
                    502: $show_all
                    503: ";
                    504:     }
                    505:     $result.='
                    506:        <span class="LC_nobreak">
                    507:        '.&mt('Apply style file: ').'
                    508:          <input type="text" name="style_file" value="'.&HTML::Entities::encode($env{'construct.style'},'"<>&').'" />
                    509:          <a href="javascript:openbrowser(\'lonhomework\',\'style_file\',\'sty\')">'.&mt('Select').'</a>
                    510:        </span>
1.422     www       511:      </div>
                    512:      <div class="LC_edit_problem_header_row1">'.
                    513:        &Apache::lonxml::renderingoptions().'
1.406     albertel  514:      </div>
                    515:      <input type="submit" name="changeproblemmode" value="'.&mt("Change View").'" />
                    516:      <input type="submit" name="clear_style_file" accesskey="d" value="'.&mt('Show Default View').'" />
                    517:      <input type="submit" name="resetdata" accesskey="r" value="'.&mt('Reset Submissions').'" />
                    518:    </div>
1.453     bisitz    519:    <hr />
1.406     albertel  520:    <div class="LC_edit_problem_header_randomize_row">
                    521:      <input type="submit" name="newrandomization" accesskey="a" value="'.&mt('New Randomization').'" />
                    522:      <input type="submit" name="changerandseed" value="'.&mt('Change Random Seed To:').'" />
                    523:      <input type="text" name="rndseed" size="10" value="'.
                    524: 	       $rndseed.'"
                    525:              onchange="javascript:document.lonhomework.changerandseed.click()" />';
                    526: 
                    527:     if (!$Apache::lonhomework::parsing_a_task) {
                    528: 	my $numtoanalyze=$env{'form.numtoanalyze'};
                    529: 	if (!$numtoanalyze) { $numtoanalyze=20; }
1.408     albertel  530: 	$result .= '<span class="LC_nobreak">'.
                    531: 	    &mt('[_1] for [_2] versions.',
1.416     raeburn   532: 		'<input type="button" name="submitmode" value="'.&mt('Calculate answers').'" '.
1.419     bisitz    533:                 'onclick="javascript:setmode(this.form,'."'calcanswers'".')" />'
                    534:                ,'<input type="text" name="numtoanalyze" value="'.
1.408     albertel  535: 		$numtoanalyze.'" size="5" />').
                    536: 		&Apache::loncommon::help_open_topic("Analyze_Problem",'',undef,undef,300).
                    537: 		'</span>';
                    538: 						    
1.313     albertel  539:     }
1.406     albertel  540: 
                    541:     $result.='
                    542:    </div>
1.453     bisitz    543:    <hr />
1.447     bisitz    544:    <div>';
1.416     raeburn   545:     $result.='<input type="hidden" name="problemmode" value="view" />';
                    546:     $result .= '<input type="button" name="submitmode" accesskey="e" value="'.&mt('Edit').'" '.
                    547:                'onclick="javascript:setmode(this.form,'."'edit'".')" />';
                    548:     $result .= '<input type="button" name="submitmode" accesskey="x" value="'.&mt('EditXML').'" '.
                    549:                'onclick="javascript:setmode(this.form,'."'editxml'".')" />';
1.408     albertel  550:     $result.='
                    551:    </div>
1.453     bisitz    552:    <hr />
1.409     albertel  553:    '.&Apache::lonxml::message_location().'
1.406     albertel  554: </div>';
1.159     albertel  555:     return $result;
1.48      albertel  556: }
                    557: 
1.65      albertel  558: sub initialize_storage {
1.357     albertel  559:     my ($given_symb) = @_;
1.353     albertel  560:     undef(%Apache::lonhomework::results);
                    561:     undef(%Apache::lonhomework::history);
1.357     albertel  562:     my ($symb,$courseid,$domain,$name) = 
1.367     albertel  563: 	&Apache::lonnet::whichuser($given_symb);
1.353     albertel  564:     
                    565:     # anonymous users (CODEd exams) have no data
                    566:     if ($name eq 'anonymous' 
                    567: 	&& !defined($domain)) {
                    568: 	return;
                    569:     }
                    570: 
1.333     albertel  571:     if ($env{'request.state'} eq 'construct' 
                    572: 	|| $symb eq ''
                    573: 	|| $Apache::lonhomework::type eq 'practice') {
                    574: 	
                    575: 	my $namespace = $symb || $env{'request.uri'};
                    576: 	if ($env{'form.resetdata'} eq &mt('Reset Submissions') ||
1.374     albertel  577: 	    ($env{'form.resetdata'} eq &mt('New Problem Variation')
                    578: 	     && $env{'form.submitted'} eq 'yes') ||
1.333     albertel  579: 	    $env{'form.newrandomization'} eq &mt('New Randomization')) {
                    580: 	    &Apache::lonnet::tmpreset($namespace,'',$domain,$name);
                    581: 	    &Apache::lonxml::debug("Attempt reset");
                    582: 	}
1.159     albertel  583: 	%Apache::lonhomework::history=
1.333     albertel  584: 	    &Apache::lonnet::tmprestore($namespace,'',$domain,$name);
1.159     albertel  585: 	my ($temp)=keys %Apache::lonhomework::history ;
                    586: 	&Apache::lonxml::debug("Return message of $temp");
                    587:     } else {
                    588: 	%Apache::lonhomework::history=
                    589: 	    &Apache::lonnet::restore($symb,$courseid,$domain,$name);
                    590:     }
1.353     albertel  591: 
1.159     albertel  592:     #ignore error conditions
1.67      albertel  593:     my ($temp)=keys %Apache::lonhomework::history ;
1.159     albertel  594:     if ($temp =~ m/^error:.*/) { %Apache::lonhomework::history=(); }
1.65      albertel  595: }
                    596: 
1.435     jms       597: =pod
                    598: 
                    599: =item finalize_storage()
                    600: 
                    601: 	Stores away the result has to a student's environment
                    602: 	checks form.grade_ for specific values, other wises stores
                    603: 	to the running users environment
                    604: 	Will increment totals for attempts, students, and corrects
                    605: 	if running user has student role.
                    606: 	
                    607: =cut
                    608: 
                    609: 
1.65      albertel  610: sub finalize_storage {
1.357     albertel  611:     my ($given_symb) = @_;
1.159     albertel  612:     my $result;
1.289     albertel  613:     if (%Apache::lonhomework::results) {
1.323     albertel  614: 	my @remove = grep(/^INTERNAL_/,keys(%Apache::lonhomework::results));
                    615: 	delete(@Apache::lonhomework::results{@remove});
1.357     albertel  616: 	my ($symb,$courseid,$domain,$name) = 
1.367     albertel  617: 	    &Apache::lonnet::whichuser($given_symb);
1.333     albertel  618: 	if ($env{'request.state'} eq 'construct' 
                    619: 	    || $symb eq ''
                    620: 	    || $Apache::lonhomework::type eq 'practice') {
                    621: 	    my $namespace = $symb || $env{'request.uri'};
1.284     albertel  622: 	    $Apache::lonhomework::results{'rndseed'}=$env{'form.rndseed'};
1.159     albertel  623: 	    $result=&Apache::lonnet::tmpstore(\%Apache::lonhomework::results,
1.333     albertel  624: 					      $namespace,'',$domain,$name);
1.159     albertel  625: 	    &Apache::lonxml::debug('Construct Store return message:'.$result);
                    626: 	} else {
                    627: 	    $result=&Apache::lonnet::cstore(\%Apache::lonhomework::results,
                    628: 					    $symb,$courseid,$domain,$name);
                    629: 	    &Apache::lonxml::debug('Store return message:'.$result);
1.470     raeburn   630:             &store_aggregates($symb,$courseid);
1.159     albertel  631: 	}
1.323     albertel  632:     } else {
                    633: 	&Apache::lonxml::debug('Nothing to store');
1.67      albertel  634:     }
1.159     albertel  635:     return $result;
1.65      albertel  636: }
                    637: 
1.435     jms       638: =pod
                    639: 
                    640: item store_aggregates()
                    641: 
                    642: 	Sends hash of values to be incremented in nohist_resourcetracker.db
                    643: 	for the course. Increments total number of attempts, unique students 
                    644: 	and corrects for each part for an instance of a problem, as appropriate.
                    645: 	
                    646: =cut
                    647: 
1.285     raeburn   648: sub store_aggregates {
                    649:     my ($symb,$courseid) = @_;
1.472     raeburn   650:     my (%aggregate,%anoncounter);
1.286     albertel  651:     my @parts;
1.288     albertel  652:     my $cdomain = $env{'course.'.$env{'request.course.id'}.'.domain'};
                    653:     my $cname = $env{'course.'.$env{'request.course.id'}.'.num'};
1.286     albertel  654:     foreach my $key (keys(%Apache::lonhomework::results)) {
1.287     albertel  655:         if ($key =~ /resource\.([^\.]+)\.tries/) {
1.286     albertel  656:             push(@parts, $1);
1.285     raeburn   657:         }
                    658:     }
1.286     albertel  659:     foreach my $part (@parts) {
1.470     raeburn   660:         if ($env{'request.role'} =~/^st/) {
                    661:             if ($Apache::lonhomework::results{'resource.'.$part.'.award'}
                    662: 	        eq 'APPROX_ANS' ||
                    663: 	        $Apache::lonhomework::results{'resource.'.$part.'.award'}
                    664: 	        eq 'EXACT_ANS') {
                    665:                 $aggregate{$symb."\0".$part."\0correct"} = 1;
                    666:             }
                    667:             if ($Apache::lonhomework::results{'resource.'.$part.'.tries'} == 1) {
                    668:                 $aggregate{$symb."\0".$part."\0users"} = 1;
                    669:             } else {
                    670:                 my (undef,$last_reset) = &Apache::grades::get_last_resets($symb,$env{'request.course.id'},[$part]); 
                    671:                 if ($last_reset) {
                    672:                     if (&Apache::grades::get_num_tries(\%Apache::lonhomework::history,$last_reset,$part) == 0) {
                    673:                         $aggregate{$symb."\0".$part."\0users"} = 1;
                    674:                     }
                    675:                 }
                    676:             }
                    677:             $aggregate{$symb."\0".$part."\0attempts"} = 1;
1.285     raeburn   678:         }
1.470     raeburn   679:         if (($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'anonsurvey') || 
                    680:             ($Apache::lonhomework::results{'resource.'.$part.'.type'} eq 'anonsurveycred')) {
1.472     raeburn   681:             $anoncounter{$symb."\0".$part} = 1;
1.470     raeburn   682:             my $needsrelease = $Apache::lonnet::needsrelease{'parameter:type:'.$Apache::lonhomework::results{'resource.'.$part.'.type'}};
                    683:             if ($needsrelease) {   
                    684:                 my $curr_required = $env{'course.'.$env{'request.course.id'}.'.internal.releaserequired'};
                    685:                 if ($curr_required eq '') {
1.471     raeburn   686:                     &Apache::lonnet::update_released_required($needsrelease);
1.470     raeburn   687:                 } else {
                    688:                     my ($currmajor,$currminor) = split(/\./,$curr_required);
                    689:                     my ($needsmajor,$needsminor) = split(/\./,$needsrelease);
                    690:                     if (($currmajor < $needsmajor) || ($currmajor == $needsmajor && $currminor < $needsminor)) {
1.471     raeburn   691:                         &Apache::lonnet::update_released_required($needsrelease);
1.470     raeburn   692:                     }
1.292     raeburn   693:                 }
                    694:             }
1.285     raeburn   695:         }
                    696:     }
1.292     raeburn   697:     if (keys (%aggregate) > 0) {
1.289     albertel  698: 	&Apache::lonnet::cinc('nohist_resourcetracker',\%aggregate,
1.292     raeburn   699:                             $cdomain,$cname);
                    700:     }
1.472     raeburn   701:     if (keys(%anoncounter) > 0) {
                    702:         &Apache::lonnet::cinc('nohist_anonsurveys',\%anoncounter,
                    703:                             $cdomain,$cname);
                    704:     }
1.292     raeburn   705: }
1.289     albertel  706: 
1.65      albertel  707: sub checkout_msg {
1.211     albertel  708:     my %lt=&Apache::lonlocal::texthash( 
                    709: 		'resource'=>'The resource needs to be checked out',
                    710: 		'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.',
                    711:                 'warning'=>'Checking out resources is subject to course policies, and may exclude future credit even if done erroneously.',
                    712:                 'checkout'=>'Check out Exam for Viewing',
                    713: 		'checkout?'=>'Check out Exam?');
1.352     albertel  714:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.159     albertel  715:     return (<<ENDCHECKOUT);
1.211     albertel  716: <h2>$lt{'resource'}</h2>
                    717:     <p>$lt{'id_expln'}</p>
1.449     bisitz    718: <p class="LC_warning">$lt{'warning'}</p>
1.444     bisitz    719: <form name="checkout" method="post" action="$uri">
1.91      albertel  720: <input type="hidden" name="doescheckout" value="yes" />
1.211     albertel  721: <input type="button" name="checkoutbutton" value="$lt{'checkout'}" onClick="javascript:if (confirm('$lt{'checkout?'}')) { document.checkout.submit(); }" />
1.65      albertel  722: </form>
                    723: ENDCHECKOUT
                    724: }
                    725: 
1.252     albertel  726: sub firstaccess_msg {
1.253     albertel  727:     my ($time,$symb)=@_;
1.414     albertel  728:     my $result;
                    729:     my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    730:     if ($interval[1] eq 'map') {
                    731: 	my ($map)=&Apache::lonnet::decode_symb($symb);
                    732: 	my $foldertitle=&Apache::lonnet::gettitle($map);
                    733:     
                    734: 	&Apache::lonxml::debug("map is $map title is $foldertitle");
1.418     bisitz    735: 	$result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    736:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    737:                              ,$foldertitle,$time)."</h2>";
1.414     albertel  738:     } elsif ($interval[1] eq 'course') {
                    739: 	my $course = $env{'course.'.$env{'request.course.id'}.'.description'};
1.418     bisitz    740:         $result .= "<h2>".&mt('The resources in "[_1]" are open for a limited time.'
                    741:                              .' Once you click the "Show Resource" button below you have [_2] to complete all resources "[_1]".'
                    742:                              ,$course,$time)."</h2>";
1.414     albertel  743:     } else {
                    744: 	my $title=&Apache::lonnet::gettitle($symb);
1.418     bisitz    745:         $result .= "<h2>".&mt('This resource "[_1]" is open for a limited time.'
                    746:                              .' Once you click the "Show Resource" button below you have [_2] to complete this resource "[_1]".'
                    747:                              ,$title,$time)."</h2>";
1.414     albertel  748:     }
1.352     albertel  749:     my $uri = &Apache::lonenc::check_encrypt($env{'request.uri'});
1.418     bisitz    750:     my $buttontext = &mt('Show Resource');
                    751:     my $timertext = &mt('Start Timer?');
1.414     albertel  752:     $result .= (<<ENDCHECKOUT);
1.444     bisitz    753: <form name="markaccess" method="post" action="$uri">
1.252     albertel  754: <input type="hidden" name="markaccess" value="yes" />
1.418     bisitz    755: <input type="button" name="accessbutton" value="$buttontext" onClick="javascript:if (confirm('$timertext')) { document.markaccess.submit(); }" />
1.252     albertel  756: </form>
                    757: ENDCHECKOUT
1.414     albertel  758:     return $result;
1.252     albertel  759: }
                    760: 
1.204     albertel  761: sub init_problem_globals {
                    762:     my ($type)=@_;
                    763:     #initialize globals
1.308     foxr      764:     #   For problems, we start out in part 0 (outside a <part> tag).
                    765:     #   and part 0 is used to describe the main body of the <problem>
                    766:     #
1.204     albertel  767:     if ($type eq 'problem') {
                    768: 	$Apache::inputtags::part='0';
                    769: 	@Apache::inputtags::partlist=('0');
1.405     albertel  770: 	&Apache::lonhomework::set_show_problem_status(&get_problem_status('0'));
1.266     albertel  771: 	$Apache::lonhomework::ignore_response_errors=0;
1.308     foxr      772: 
1.266     albertel  773:     } elsif ($type eq 'library') {
1.204     albertel  774: 	$Apache::inputtags::part='';
                    775: 	@Apache::inputtags::partlist=();
1.405     albertel  776: 	&Apache::lonhomework::reset_show_problem_status();
1.266     albertel  777: 	$Apache::lonhomework::ignore_response_errors=1;
1.308     foxr      778: 
1.304     albertel  779:     } elsif ($type eq 'Task') {
                    780: 	$Apache::inputtags::part='0';
                    781: 	@Apache::inputtags::partlist=('0');
1.405     albertel  782: 	&Apache::lonhomework::reset_show_problem_status();
1.304     albertel  783: 	$Apache::lonhomework::ignore_response_errors=1;
1.204     albertel  784:     }
                    785:     @Apache::inputtags::responselist = ();
                    786:     @Apache::inputtags::importlist = ();
                    787:     @Apache::inputtags::previous=();
                    788:     @Apache::inputtags::previous_version=();
                    789:     $Apache::structuretags::printanswer='No';
                    790:     @Apache::structuretags::whileconds=();
                    791:     @Apache::structuretags::whilebody=();
                    792:     @Apache::structuretags::whileline=();
                    793:     $Apache::lonhomework::scantronmode=0;
                    794:     undef($Apache::lonhomework::name);
1.358     albertel  795:     undef($Apache::lonhomework::default_type);
                    796:     undef($Apache::lonhomework::type);
1.204     albertel  797: }
                    798: 
                    799: sub reset_problem_globals {
                    800:     my ($type)=@_;
                    801:     undef(%Apache::lonhomework::history);
                    802:     undef(%Apache::lonhomework::results);
                    803:     undef($Apache::inputtags::part);
1.208     albertel  804: #don't undef this, lonhomework.pm takes care of this, we use this to 
                    805: #detect if we try to do 2 problems in one file
                    806: #   undef($Apache::lonhomework::parsing_a_problem);
1.204     albertel  807:     undef($Apache::lonhomework::name);
1.358     albertel  808:     undef($Apache::lonhomework::default_type);
                    809:     undef($Apache::lonhomework::type);
                    810:     undef($Apache::lonhomework::scantronmode);
                    811:     undef($Apache::lonhomework::ignore_response_errors);
1.405     albertel  812:     &Apache::lonhomework::reset_show_problem_status();
1.204     albertel  813: }
                    814: 
1.241     albertel  815: sub set_problem_state {
1.240     albertel  816:     my ($part)=@_;
1.284     albertel  817:     if ($env{'form.problemstate'} eq 'CANNOT_ANSWER_correct') {
1.240     albertel  818: 	$Apache::lonhomework::history{"resource.$part.solved"}=
                    819: 	    'correct_by_student';
                    820:     }
                    821: }
                    822: 
1.241     albertel  823: sub get_problem_status {
                    824:     my ($part)=@_;
1.267     albertel  825:     my $problem_status;
1.284     albertel  826:     if ($env{'request.state'} eq 'construct' &&
                    827: 	defined($env{'form.problemstatus'})) {
                    828: 	$problem_status=$env{'form.problemstatus'};
1.267     albertel  829:     } else {
                    830: 	$problem_status=&Apache::lonnet::EXT("resource.$part.problemstatus");
                    831: 	&Apache::lonxml::debug("problem status for $part is $problem_status");
1.284     albertel  832: 	&Apache::lonxml::debug("env probstat is ".$env{'form.problemstatus'});
1.241     albertel  833:     }
                    834:     return $problem_status;
                    835: }
                    836: 
1.9       albertel  837: sub start_problem {
1.326     albertel  838:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.19      albertel  839: 
1.311     foxr      840:     # We'll use the redirection to fix up printing of duedates.
1.321     albertel  841:     if (!$Apache::lonxml::metamode) {
                    842: 	&Apache::lonxml::startredirection();
                    843:     }
1.311     foxr      844: 
1.308     foxr      845:     # Problems don't nest and we don't allow more than one <problem> in
                    846:     # a .problem file.
                    847:     #
1.184     albertel  848:     if ( $Apache::inputtags::part ne '' ||
                    849: 	 $Apache::lonhomework::parsing_a_problem) {
                    850: 	&Apache::lonxml::error('Only one &lt;problem&gt; allowed in a .problem file');
1.326     albertel  851: 	#my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,$style);
1.159     albertel  852: 	return '';
                    853:     }
1.184     albertel  854: 
                    855:     $Apache::lonhomework::parsing_a_problem=1;
1.204     albertel  856:     &init_problem_globals('problem');
1.166     albertel  857: 
1.284     albertel  858:     if (defined($env{'scantron.maxquest'})) {
1.166     albertel  859: 	$Apache::lonhomework::scantronmode=1;
                    860:     }
1.161     albertel  861: 
1.159     albertel  862:     if ($target ne 'analyze') {
1.415     raeburn   863:         my $type = &Apache::lonnet::EXT('resource.0.type');
                    864: 	$Apache::lonhomework::type=$type;
1.284     albertel  865: 	if (($env{'request.state'} eq 'construct') &&
1.410     albertel  866: 	    $env{'form.problemtype'} =~ /\S/) {
1.284     albertel  867: 	    $Apache::lonhomework::type=$env{'form.problemtype'};
1.237     albertel  868: 	}
1.332     albertel  869: 	&Apache::lonxml::debug("Found this to be of type :$Apache::lonhomework::type:");
1.159     albertel  870:     }
1.164     albertel  871:     if ($Apache::lonhomework::type eq '' ) {
1.284     albertel  872: 	my $uri=$env{'request.uri'};
1.159     albertel  873: 	if ($uri=~/\.(\w+)$/) {
                    874: 	    $Apache::lonhomework::type=$1;
                    875: 	    &Apache::lonxml::debug("Using type of $1");
                    876: 	} else {
                    877: 	    $Apache::lonhomework::type='problem';
                    878: 	    &Apache::lonxml::debug("Using default type, problem, :$uri:");
                    879: 	}
1.87      albertel  880:     }
1.301     albertel  881:     $Apache::lonhomework::default_type = $Apache::lonhomework::type;
1.58      www       882: 
1.363     albertel  883:     &initialize_storage();
1.389     albertel  884:     if ($target ne 'analyze'
                    885:        	&& $env{'request.state'} eq 'construct') {
                    886: 	&set_problem_state('0');
                    887:     }
                    888: 
1.366     albertel  889:     if ($target eq 'web') {
                    890: 	&Apache::lonxml::debug(" grading history ");
                    891: 	&Apache::lonhomework::showhash(%Apache::lonhomework::history);
                    892:     }
1.363     albertel  893: 
1.159     albertel  894:     #added vars to the scripting enviroment
1.213     albertel  895:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.248     albertel  896:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.24      albertel  897:     &Apache::run::run($expression,$safeeval);
1.159     albertel  898:     my $status;
                    899:     my $accessmsg;
                    900: 
1.343     albertel  901:     my $name= &get_resource_name($parstack,$safeeval);
1.350     albertel  902:     my ($result,$form_tag_start);
1.354     albertel  903:     if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
                    904: 	|| $target eq 'edit') {
1.350     albertel  905: 	($result,$form_tag_start) =
                    906: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                    907: 			$name);
                    908:     }
                    909: 
1.284     albertel  910:     if ($target eq 'tex' and $env{'request.symb'} =~ m/\.page_/) {$result='';}
1.159     albertel  911: 
                    912:     if ($target eq 'analyze') { my $rndseed=&setup_rndseed($safeeval); }
                    913:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                    914: 	$target eq 'tex') {
1.284     albertel  915: 	if ($env{'form.markaccess'}) {
1.414     albertel  916: 	    my @interval=&Apache::lonnet::EXT("resource.0.interval");
                    917: 	    &Apache::lonnet::set_first_access($interval[1]);
1.252     albertel  918: 	}
1.159     albertel  919: 	#handle rand seed in construction space
                    920: 	my $rndseed=&setup_rndseed($safeeval);
1.367     albertel  921: 	my ($symb)=&Apache::lonnet::whichuser();
1.333     albertel  922: 	if ($env{'request.state'} ne "construct" && 
                    923: 	    ($symb eq '' || $Apache::lonhomework::type eq 'practice')) {
1.162     albertel  924: 	    $form_tag_start.='<input type="hidden" name="rndseed" value="'.
1.462     raeburn   925: 		$rndseed.'" />'.
                    926: 		    '<input type="submit" name="resetdata"
                    927:                              value="'.&mt('New Problem Variation').'" />';
1.334     albertel  928: 	    if (exists($env{'form.username'})) {
                    929: 		$form_tag_start.=
1.164     albertel  930: 		    '<input type="hidden" name="username"
1.284     albertel  931:                              value="'.$env{'form.username'}.'" />';
1.334     albertel  932: 	    }
1.462     raeburn   933: 	    if ($env{'request.role.adv'}) {
                    934: 		$form_tag_start.= ' <label class="LC_nobreak">'
                    935:                          .'<input type="checkbox" name="showallfoils"';
                    936: 		if (defined($env{'form.showallfoils'})) {
                    937: 		    $form_tag_start.=' checked="checked"';
                    938: 		}
                    939:                 $form_tag_start.= ' /> '
                    940:                                  .&mt('Show All Foils')
                    941:                                  .'</label>';
                    942: 	    }
1.417     www       943:             if ($Apache::lonhomework::type eq 'practice') {
1.428     raeburn   944:                 $form_tag_start.=&practice_problem_header();
1.417     www       945:             }
1.462     raeburn   946: 	    $form_tag_start.='<hr />';
1.162     albertel  947: 	}
1.324     albertel  948: 
                    949: 	($status,$accessmsg,my $slot_name,my $slot) = 
                    950: 	    &Apache::lonhomework::check_slot_access('0','problem');
1.159     albertel  951: 	push (@Apache::inputtags::status,$status);
1.324     albertel  952: 
1.159     albertel  953: 	my $expression='$external::datestatus="'.$status.'";';
                    954: 	$expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.0.solved"}.'";';
                    955: 	&Apache::run::run($expression,$safeeval);
                    956: 	&Apache::lonxml::debug("Got $status");
1.324     albertel  957: 
1.159     albertel  958: 	if (( $status eq 'CLOSED' ) ||
                    959: 	    ( $status eq 'UNCHECKEDOUT') ||
1.252     albertel  960: 	    ( $status eq 'NOT_YET_VIEWED') ||
1.159     albertel  961: 	    ( $status eq 'BANNED') ||
1.216     albertel  962: 	    ( $status eq 'UNAVAILABLE') ||
1.324     albertel  963: 	    ( $status eq 'NOT_IN_A_SLOT') ||
1.216     albertel  964: 	    ( $status eq 'INVALID_ACCESS')) {
1.326     albertel  965: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    966: 						       $style);
1.159     albertel  967: 	    if ( $target eq "web" ) {
1.343     albertel  968: 		my $msg;
1.159     albertel  969: 		if ($status eq 'UNAVAILABLE') {
1.245     albertel  970: 		    $msg.='<h1>'.&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'</h1>';
1.441     raeburn   971:                 } elsif ($status eq 'NOT_IN_A_SLOT') {
                    972:                     $msg.='<h1>'.&mt('You are not currently signed up to work at this time and/or place.').'</h1>';
1.253     albertel  973: 		} elsif ($status ne 'NOT_YET_VIEWED') {
1.245     albertel  974: 		    $msg.='<h1>'.&mt('Not open to be viewed').'</h1>';
1.159     albertel  975: 		}
1.216     albertel  976: 		if ($status eq 'CLOSED' || $status eq 'INVALID_ACCESS') {
1.393     www       977: 		    $msg.=&mt('The problem ').$accessmsg;
1.159     albertel  978: 		} elsif ($status eq 'UNCHECKEDOUT') {
1.343     albertel  979: 		    $msg.=&checkout_msg();
1.252     albertel  980: 		} elsif ($status eq 'NOT_YET_VIEWED') {
1.253     albertel  981: 		    $msg.=&firstaccess_msg($accessmsg,$symb);
1.325     albertel  982: 		} elsif ($status eq 'NOT_IN_A_SLOT') {
1.441     raeburn   983: 		    $msg.=&Apache::bridgetask::add_request_another_attempt_button("Sign up for time to work");
1.159     albertel  984: 		}
                    985: 		$result.=$msg.'<br />';
                    986: 	    } elsif ($target eq 'tex') {
1.332     albertel  987: 		my $startminipage = ($env{'form.problem_split'}=~/yes/i)? ''
                    988: 		                    : '\begin{minipage}{\textwidth}';
1.443     foxr      989: 		$result.='\noindent \vskip 1 mm '.
1.332     albertel  990: 		    $startminipage.'\vskip 0 mm';
1.159     albertel  991: 		if ($status eq 'UNAVAILABLE') {
1.211     albertel  992: 		    $result.=&mt('Unable to determine if this resource is open due to network problems. Please try again later.').'\vskip 0 mm ';
1.159     albertel  993: 		} else {
1.211     albertel  994: 		    $result.=&mt('Problem is not open to be viewed. It')." $accessmsg \\vskip 0 mm ";
1.159     albertel  995: 		}
                    996: 	    }
1.324     albertel  997: 	} elsif ($status eq 'NEEDS_CHECKIN') {
1.326     albertel  998: 	    my $bodytext=&Apache::lonxml::get_all_text("/problem",$parser,
                    999: 						       $style);
1.324     albertel 1000: 	    if ($target eq 'web') {
1.375     albertel 1001: 		$result .= 
                   1002: 		    &Apache::bridgetask::proctor_validation_screen($slot);
1.324     albertel 1003: 	    } elsif ($target eq 'grade') {
                   1004: 		&Apache::bridgetask::proctor_check_auth($slot_name,$slot,
                   1005: 							'problem');
                   1006: 	    }
1.159     albertel 1007: 	} elsif ($target eq 'web') {
1.360     albertel 1008: 	    if ($status eq 'CAN_ANSWER' 
                   1009: 		&& $slot_name ne ''
                   1010: 		&& $Apache::lonhomework::history{'resource.0.checkedin'} eq '') {
                   1011: 		# unproctored slot access, self checkin
                   1012: 		&Apache::bridgetask::check_in('problem',undef,undef,
                   1013: 					      $slot_name);
                   1014: 	    }
1.368     albertel 1015: 	    $result.="\n $form_tag_start \t".	
1.227     albertel 1016: 	      '<input type="hidden" name="submitted" value="yes" />';
                   1017: 	    # create a page header and exit
1.284     albertel 1018: 	    if ($env{'request.state'} eq "construct") {
                   1019: 		$result.= &problem_web_to_edit_header($env{'form.rndseed'});
1.428     raeburn  1020:                 if ($Apache::lonhomework::type eq 'practice') {
                   1021:                     $result.= '<input type="submit" name="resetdata" '.
                   1022:                               'value="'.&mt('New Problem Variation').'" />'.
                   1023:                               &practice_problem_header().'<hr />';
                   1024:                 }
1.227     albertel 1025: 	    }
                   1026: 	    # if we are viewing someone else preserve that info
1.284     albertel 1027: 	    if (defined $env{'form.grade_symb'}) {
1.227     albertel 1028: 		foreach my $field ('symb','courseid','domain','username') {
                   1029: 		    $result .= '<input type="hidden" name="grade_'.$field.
1.284     albertel 1030: 			'" value="'.$env{"form.grade_$field"}.'" />'."\n";
1.159     albertel 1031: 		}
                   1032: 	    }
                   1033: 	} elsif ($target eq 'tex') {
1.319     foxr     1034: 	    $result .= 'INSERTTEXFRONTMATTERHERE';
                   1035: 
1.99      sakharuk 1036: 	}
1.159     albertel 1037:     } elsif ($target eq 'edit') {
1.343     albertel 1038: 	$result .= $form_tag_start.&problem_edit_header();
1.226     albertel 1039: 	$Apache::lonxml::warnings_error_header=
                   1040: 	    &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 1041: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1042: 	$result.=$temp;
                   1043:     } elsif ($target eq 'modified') {
                   1044: 	$result=$token->[4];
                   1045:     } else {
                   1046: 	# page_start returned a starting result, delete it if we don't need it
                   1047: 	$result = '';
1.99      sakharuk 1048:     }
1.159     albertel 1049:     return $result;
1.9       albertel 1050: }
                   1051: 
                   1052: sub end_problem {
1.159     albertel 1053:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.321     albertel 1054:     my $result;
1.310     foxr     1055: 
1.321     albertel 1056:     if (!$Apache::lonxml::metamode) {
                   1057: 	$result = &Apache::lonxml::endredirection(); #started in &start_problem
1.329     albertel 1058: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1059:     }
1.319     foxr     1060: 
                   1061:     if ($target eq 'tex') {
1.321     albertel 1062: 	# Figure out the front matter and replace the
                   1063: 	# INSERTTEXFRONTMATTERHERE in result with it.  note that we do
                   1064: 	# this in end_problem because whether or not we display due
                   1065: 	# dates depends on whether due dates have already been
                   1066: 	# displayed in the problem parts.
                   1067: 
1.319     foxr     1068: 	my $frontmatter   = '';
                   1069: 	my $startminipage = '';
                   1070: 	if (not $env{'form.problem_split'}=~/yes/) {
                   1071: 	    $startminipage = '\begin{minipage}{\textwidth}';
                   1072: 	}
                   1073: 	my $id = $Apache::inputtags::part;
                   1074: 	my $weight = &Apache::lonnet::EXT("resource.$id.weight");
                   1075: 	my $packages=&Apache::lonnet::metadata($env{'request.uri'},'packages');
                   1076: 	my @packages = split /,/,$packages;
                   1077: 	my $allow_print_points = 0;
                   1078: 	foreach my $partial_key (@packages) {
                   1079: 	    if ($partial_key=~m/^part_0$/) {
                   1080: 		$allow_print_points=1;
                   1081: 	    }
                   1082: 	}
                   1083: 	my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1084: 	if (defined($maxtries) && $maxtries < 0) { $allow_print_points=0; }
                   1085: 	if (lc($env{'course.'.$env{'request.course.id'}.
                   1086: 			'.disableexampointprint'}) eq 'yes') {
                   1087: 	    $allow_print_points=0;
                   1088: 	}
                   1089: 	my $name_of_resourse= &Apache::lonxml::latex_special_symbols(&get_resource_name($parstack,$safeeval),'header');
1.443     foxr     1090: 	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     1091: 	my $toc_line='\vskip 1 mm\noindent '.$startminipage.
                   1092: 	    '\addcontentsline{toc}{subsection}{'.$name_of_resourse.'}';
                   1093: 	
                   1094: 	#  Figure out what the due date is and if we need to print
                   1095: 	#  it in the problem header.  We have been logging the
                   1096: 	#  last due date written to file. 
                   1097: 	
                   1098: 	my $duetime = &Apache::lonnet::EXT("resource.$id.duedate"); 
                   1099: 	my $duedate = POSIX::strftime("%c",localtime($duetime));
1.448     bisitz   1100:         my $duedate_text = &mt('Due date: [_1]'
                   1101:                               ,&Apache::lonlocal::locallocaltime($duetime));
1.319     foxr     1102: 	my $temp_file;
                   1103: 	my $filename = "/home/httpd/prtspool/$env{'user.name'}_$env{'user.domain'}_printout.due";
                   1104: 	
                   1105: 	# Figure out what the last printed due date is or set it
                   1106: 	# to the epoch if no duedates have been printed.
                   1107: 	
                   1108: 	my $due_file_content = 0;      #   If the file does not yet exist, time is the epoch.
                   1109: 	if (-e $filename) {
                   1110: 	    $temp_file = Apache::File->new($filename);
                   1111: 	    my @due_file      = <$temp_file>;
                   1112: 	    $due_file_content = $due_file[$#due_file];
                   1113: 	    chomp $due_file_content;
                   1114: 	} 
                   1115: 	
                   1116: 	# We display the due date iff it is not the same as the last
                   1117: 	# duedate in problem header ($due_file_content), and
                   1118: 	# none of our parts displayed a duedate.
                   1119: 	#
                   1120: 	my $parts_with_displayduedate;
                   1121: 	if (defined $Apache::outputtags::showonce{'displayduedate'}) {
                   1122: 	    $parts_with_displayduedate = 
                   1123: 		scalar(@{$Apache::outputtags::showonce{'displayduedate'}});
                   1124: 	} else {
                   1125: 	    $parts_with_displayduedate = 0;
                   1126: 	}
                   1127: 	if (($due_file_content != $duetime) && ($parts_with_displayduedate == 0) ) {
                   1128: 	    $temp_file = Apache::File->new('>'.$filename);
                   1129: 	    print $temp_file "$duetime\n";
                   1130: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1131: 		if(not $duedate=~m/1969/ and $Apache::lonhomework::type ne 'exam') {
                   1132: 		    $frontmatter .= $begin_doc.
1.448     bisitz   1133: 			'\textit{'.$duedate_text.'} '.$toc_line;
1.319     foxr     1134: 		} else {
                   1135: 		    $frontmatter.= $begin_doc.$toc_line;
1.463     foxr     1136: 		    if ($Apache::lonhomework::type eq 'exam' and $allow_print_points==1) { 
                   1137: 			$frontmatter .= '\fbox{\textit{'.$weight.' pt}}';
                   1138: 		    }
1.319     foxr     1139: 		}
                   1140: 	    } else {
1.448     bisitz   1141: 		$frontmatter .= '\vskip 1mm\textit{'.$duedate_text.'} \\\\\\\\'.$startminipage;
1.319     foxr     1142: 	    }
                   1143: 	} else {
                   1144: 	    if (not $env{'request.symb'} =~ m/\.page_/) {
                   1145: 		$frontmatter .= $begin_doc.$toc_line;
1.463     foxr     1146: 		if (($Apache::lonhomework::type eq 'exam') and ($allow_print_points==1)) { 
                   1147: 		    $frontmatter .= '\fbox{\textit{'.$weight.' pt}}';
                   1148: 		}
1.319     foxr     1149: 	    } else {
1.381     albertel 1150: 		$frontmatter .= '\vskip 1mm \\\\\\\\'.$startminipage;
1.319     foxr     1151: 	    }
                   1152: 	}
                   1153: 	$result =~ s/INSERTTEXFRONTMATTERHERE/$frontmatter/;
                   1154:     }
                   1155: 
1.159     albertel 1156:     my $status=$Apache::inputtags::status['-1'];
                   1157:     if ($target eq 'grade' || $target eq 'web' || $target eq 'answer' ||
                   1158: 	$target eq 'tex') {
1.249     albertel 1159: 	if ( $target eq 'grade' && $Apache::inputtags::part eq '0') {
1.159     albertel 1160: 	    # if part is zero, no <part>s existed, so we need to the grading
1.249     albertel 1161: 	    if ($status eq 'CAN_ANSWER' ||$Apache::lonhomework::scantronmode) {
                   1162: 		&Apache::inputtags::grade;
1.324     albertel 1163: 	    } elsif ($status eq 'NEEDS_CHECKIN') {
                   1164: 		# no need to grade, and don't want to hide data
1.249     albertel 1165: 	    } else {
                   1166: 		# move any submission data to .hidden
                   1167: 		&Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1168: 	    }
1.159     albertel 1169: 	} elsif ( ($target eq 'web' || $target eq 'tex') &&
                   1170: 		  $Apache::inputtags::part eq '0' &&
1.252     albertel 1171: 		  $status ne 'UNCHECKEDOUT' && $status ne 'NOT_YET_VIEWED') {
1.159     albertel 1172: 	    # if part is zero, no <part>s existed, so we need show the current
                   1173: 	    # grading status
                   1174: 	    my $gradestatus = &Apache::inputtags::gradestatus($Apache::inputtags::part,$target);
                   1175: 	    $result.= $gradestatus;
                   1176: 	}
                   1177: 	if (
1.284     albertel 1178: 	    (($target eq 'web') && ($env{'request.state'} ne 'construct')) ||
1.159     albertel 1179: 	    ($target eq 'answer') || ($target eq 'tex')
                   1180: 	   ) {
1.227     albertel 1181: 	    if ($target ne 'tex' &&
1.284     albertel 1182: 		$env{'form.answer_output_mode'} ne 'tex') {
1.254     www      1183: 		$result.="</form>";
1.159     albertel 1184: 	    }
                   1185: 	    if ($target eq 'web') {
1.346     albertel 1186: 		$result.= &Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1187: 	    } elsif ($target eq 'tex') {
1.178     sakharuk 1188: 		my $endminipage = '';
1.284     albertel 1189: 		if (not $env{'form.problem_split'}=~/yes/) {
1.178     sakharuk 1190: 		    $endminipage = '\end{minipage}';
                   1191: 		}
1.284     albertel 1192:                 if ($env{'form.print_discussions'} eq 'yes') {
1.263     sakharuk 1193: 		    $result.=&Apache::lonxml::xmlend($target,$parser);
1.159     albertel 1194: 		} else {
1.262     sakharuk 1195: 		    $result .= '\keephidden{ENDOFPROBLEM}\vskip 0.5mm\noindent\makebox[\textwidth/$number_of_columns][b]{\hrulefill}';
1.284     albertel 1196: 		    if (not $env{'request.symb'} =~ m/\.page_/) {
1.262     sakharuk 1197: 			$result .= $endminipage.'\end{document} ';
                   1198: 		    } else {
1.382     albertel 1199: 			$result .= $endminipage;
1.262     sakharuk 1200: 		    }
1.159     albertel 1201: 		}
                   1202: 	    }
                   1203: 	}
                   1204: 	if ($target eq 'grade') {
                   1205: 	    &Apache::lonhomework::showhash(%Apache::lonhomework::results);
                   1206: 	    &finalize_storage();
                   1207: 	}
1.284     albertel 1208: 	if ($target eq 'answer' && ($env{'request.state'} eq 'construct')
                   1209: 	    && $env{'form.answer_output_mode'} ne 'tex') {
1.346     albertel 1210: 	    $result.=&Apache::loncommon::end_page({'discussion' => 1});
1.294     albertel 1211: 	                        # normally we get it from above, but in CSTR
1.172     albertel 1212: 	                        # we always show answer mode too.
1.159     albertel 1213: 	}
                   1214:     } elsif ($target eq 'meta') {
                   1215: 	if ($Apache::inputtags::part eq '0') {
1.179     albertel 1216: 	    @Apache::inputtags::response=();
1.159     albertel 1217: 	    $result=&Apache::response::mandatory_part_meta;
                   1218: 	}
1.215     albertel 1219: 	$result.=&Apache::response::meta_part_order();
1.258     albertel 1220: 	$result.=&Apache::response::meta_response_order();
1.159     albertel 1221:     } elsif ($target eq 'edit') {
                   1222: 	&Apache::lonxml::debug("in end_problem with $target, edit");
1.314     albertel 1223: 	$result .= &problem_edit_footer();
1.320     albertel 1224:     } elsif ($target eq 'modified') {
                   1225: 	 $result .= $token->[2];
1.159     albertel 1226:     }
1.155     albertel 1227: 
1.284     albertel 1228:     if ($env{'request.state'} eq 'construct' && $target eq 'web') {
1.177     albertel 1229: 	&Apache::inputtags::check_for_duplicate_ids();
                   1230:     }
1.204     albertel 1231: 
                   1232:     &reset_problem_globals('problem');
1.159     albertel 1233: 
                   1234:     return $result;
1.48      albertel 1235: }
                   1236: 
1.108     albertel 1237: 
1.48      albertel 1238: sub start_library {
1.159     albertel 1239:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.343     albertel 1240:     my ($result,$form_tag_start);
1.371     albertel 1241:     if ($#$tagstack eq 0 && $$tagstack[0] eq 'library') {
1.244     albertel 1242: 	&init_problem_globals('library');
                   1243: 	$Apache::lonhomework::type='problem';
                   1244:     }
1.159     albertel 1245:     if ($target eq 'edit') {
1.343     albertel 1246: 	($result,$form_tag_start)=
                   1247: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1248: 			'Edit');
                   1249: 	$result.=$form_tag_start.&problem_edit_header();
1.159     albertel 1250: 	my $temp=&Apache::edit::insertlist($target,$token);
                   1251: 	$result.=$temp;
                   1252:     } elsif ($target eq 'modified') {
                   1253: 	$result=$token->[4];
1.340     albertel 1254:     } elsif (($target eq 'web' || $target eq 'webgrade')
1.371     albertel 1255: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library')
1.340     albertel 1256: 	     && $env{'request.state'} eq "construct" ) {
1.159     albertel 1257: 	my $name=&get_resource_name($parstack,$safeeval);
1.343     albertel 1258: 	($result,$form_tag_start)=
                   1259: 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
                   1260: 			$name);
1.159     albertel 1261: 	my $rndseed=&setup_rndseed($safeeval);
1.343     albertel 1262: 	$result.=" \n $form_tag_start".	
1.159     albertel 1263: 		  '<input type="hidden" name="submitted" value="yes" />';
                   1264: 	$result.=&problem_web_to_edit_header($rndseed);
1.428     raeburn  1265:         if ($Apache::lonhomework::type eq 'practice') {
                   1266:             $result.= '<input type="submit" name="resetdata" '.
                   1267:                       'value="'.&mt('New Problem Variation').'" />'.
                   1268:                       &practice_problem_header().'<hr />';
                   1269:         }
1.159     albertel 1270:     }
                   1271:     return $result;
1.48      albertel 1272: }
                   1273: 
                   1274: sub end_library {
1.159     albertel 1275:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1276:     my $result='';
                   1277:     if ($target eq 'edit') {
                   1278: 	$result=&problem_edit_footer();
1.371     albertel 1279:     } elsif ($target eq 'web' 
                   1280: 	     && ($#$tagstack eq 0 && $$tagstack[0] eq 'library') 
                   1281: 	     && $env{'request.state'} eq "construct") {
1.349     albertel 1282: 	$result.='</form>'.&Apache::loncommon::end_page({'discussion' => 1});
1.159     albertel 1283:     }
1.371     albertel 1284:     if ( $#$tagstack eq 0 && $$tagstack[0] eq 'library') {
                   1285: 	&reset_problem_globals('library');
                   1286:     }
1.159     albertel 1287:     return $result;
1.197     www      1288: }
                   1289: 
                   1290: sub start_definetag {
1.326     albertel 1291:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.197     www      1292: 
                   1293:     my $result;
                   1294: 
                   1295:     my $name = $token->[2]->{'name'};
1.326     albertel 1296:     my $skip=&Apache::lonxml::get_all_text("/definetag",$parser,$style);
1.396     albertel 1297:     if ($target eq 'web') {
                   1298: 	if ($name=~/^\//) {
                   1299: 	    $result=
                   1300: 		'<br /><table class="LC_sty_end"><tr><th>'.
                   1301: 		&mt('END [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1302: 	} else {
                   1303: 	    $result=
                   1304: 		'<br /><table class="LC_sty_begin"><tr><th>'.
                   1305: 		&mt('BEGIN [_1]'.'<tt>'.$name.'</tt>').'</th></tr>';
                   1306: 	}
                   1307: 	$skip = &HTML::Entities::encode($skip, '<>&"');
                   1308: 	$result.='<tr><td><pre>'.$skip.'</pre></td></tr></table>';
1.197     www      1309:     }
                   1310:     return $result;
                   1311: }
                   1312: 
                   1313: sub end_definetag {
                   1314:     return '';
1.1       albertel 1315: }
                   1316: 
                   1317: sub start_block {
1.201     albertel 1318:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.131     albertel 1319: 
                   1320:     my $result;
1.1       albertel 1321: 
1.339     albertel 1322:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer'  ||
                   1323: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.159     albertel 1324: 	my $code = $token->[2]->{'condition'};
1.385     albertel 1325: 	if (defined($code) && $code ne '') {
1.137     albertel 1326: 	    if (!$Apache::lonxml::default_homework_loaded) {
                   1327: 		&Apache::lonxml::default_homework_load($safeeval);
                   1328: 	    }
1.131     albertel 1329: 	    $result = &Apache::run::run($code,$safeeval);
                   1330: 	    &Apache::lonxml::debug("block :$code: returned :$result:");
                   1331: 	} else {
                   1332: 	    $result='1';
                   1333: 	}
                   1334: 	if ( ! $result ) {
1.201     albertel 1335: 	    my $skip=&Apache::lonxml::get_all_text("/block",$parser,$style);
1.131     albertel 1336: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1337: 	}
                   1338: 	$result='';
                   1339:     } elsif ($target eq 'edit') {
                   1340: 	$result .=&Apache::edit::tag_start($target,$token);
                   1341: 	$result .=&Apache::edit::text_arg('Test Condition:','condition',
                   1342: 					  $token,40);
                   1343: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1344:     } elsif ($target eq 'modified') {
                   1345: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1346: 						     $safeeval,'condition');
                   1347: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.38      albertel 1348:     }
1.131     albertel 1349:     return $result;
1.1       albertel 1350: }
                   1351: 
                   1352: sub end_block {
1.167     www      1353:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1354:     my $result;
                   1355:     if ($target eq "edit") {
                   1356: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1357:     }
                   1358:     return $result;
                   1359: }
                   1360: 
                   1361: sub start_languageblock {
1.201     albertel 1362:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.167     www      1363: 
                   1364:     my $result;
                   1365: 
1.339     albertel 1366:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1367: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.201     albertel 1368: 	my $include = $token->[2]->{'include'};
                   1369: 	my $exclude = $token->[2]->{'exclude'};
1.436     raeburn  1370:         my @preferred_languages=&Apache::lonlocal::preferred_languages();
1.394     www      1371: # This should not even happen, since we should at least have the server language
1.398     www      1372:         if (!$preferred_languages[0]) { $preferred_languages[0]='en'; }
                   1373: # Now loop over all languages in order of preference
                   1374:         foreach my $preferred_language (@preferred_languages) {
1.394     www      1375: # If the languageblock has no arguments, show the contents
1.399     www      1376:            $result=1;
                   1377:            my $found=0;
1.394     www      1378: # Do we have an include argument?
1.398     www      1379: 	   if ($include) {
1.394     www      1380: # If include is specified, by default, don't render the block
1.399     www      1381:               $result=0;
1.398     www      1382:               foreach my $included_language (split(/\,/,$include)) {
1.394     www      1383: # ... but if my preferred language is included, render it
1.398     www      1384:                  if ($included_language eq $preferred_language) {
1.399     www      1385:                     $result=1; 
                   1386:                     $found=1; 
1.398     www      1387:                  }
                   1388:               }
                   1389: 	   }
1.394     www      1390: # Do we have an exclude argument?
1.398     www      1391:            if ($exclude) {
1.399     www      1392:               $result=1;
1.398     www      1393:               foreach my $excluded_language (split(/\,/,$exclude)) {
                   1394:                  if ($excluded_language eq $preferred_language) {
1.399     www      1395:                     $result=0;
                   1396:                     $found=1;
1.398     www      1397:                  }
                   1398:               }
                   1399: 	   }
1.399     www      1400:            if ($found) { last; }
1.398     www      1401:         }
1.201     albertel 1402: 	if ( ! $result ) {
                   1403: 	    my $skip=&Apache::lonxml::get_all_text("/languageblock",$parser,
                   1404: 						   $style);
                   1405: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1406: 	}
                   1407: 	$result='';
1.167     www      1408:     } elsif ($target eq 'edit') {
                   1409: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1410: 	$result .=&Apache::edit::text_arg(&mt('Include Language:'),'include',
1.167     www      1411: 					  $token,40);
1.211     albertel 1412: 	$result .=&Apache::edit::text_arg(&mt('Exclude Language:'),'exclude',
1.167     www      1413: 					  $token,40);
                   1414: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1415:     } elsif ($target eq 'modified') {
                   1416: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.168     albertel 1417: 						     $safeeval,'include',
                   1418: 						     'exclude');
1.167     www      1419: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1420:     }
                   1421:     return $result;
                   1422: }
                   1423: 
                   1424: sub end_languageblock {
1.170     www      1425:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1426:     my $result;
1.201     albertel 1427:     if ($target eq "edit") {
1.170     www      1428: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1429:     }
                   1430:     return $result;
                   1431: }
                   1432: 
1.397     albertel 1433: {
                   1434:     my %available_texts;
                   1435:     sub start_translated {
                   1436: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1437: 	&Apache::lonxml::register('Apache::structuretags',('lang'));
                   1438: 	undef(%available_texts);
                   1439:     }
                   1440:     
                   1441:     sub end_translated {
                   1442: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1443: 	my $result;
                   1444: 	#show the translation on viewable targets
                   1445: 	if ($target eq 'web'     || $target eq 'tex' || $target eq 'webgrade'||
                   1446: 	    # or non-viewable targets, if it's embedded in something that
                   1447: 	    # wants the output
                   1448: 	    (($target eq 'answer' || $target eq 'analyze'|| $target eq 'grade')
                   1449: 	     && &Apache::lonxml::in_redirection() ) ) {
                   1450: 	    my @possibilities = keys(%available_texts);
                   1451: 	    my $which = 
                   1452: 		&Apache::loncommon::languages(\@possibilities) || 'default';
                   1453: 	    $result = $available_texts{$which};
                   1454: 	}
                   1455: 	undef(%available_texts);
                   1456: 	&Apache::lonxml::deregister('Apache::structuretags',('lang'));
                   1457: 	return $result;
                   1458:     }
                   1459: 
                   1460: 
                   1461:     sub start_lang {
                   1462: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1463: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1464: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1465: 	    &Apache::lonxml::startredirection();
                   1466: 	}
                   1467: 	return '';
                   1468:     }
                   1469: 
                   1470:     sub end_lang {
                   1471: 	my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   1472: 	if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1473: 	    $target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
                   1474: 	    my $result = &Apache::lonxml::endredirection();
                   1475: 	    my $which = &Apache::lonxml::get_param('which',$parstack,
                   1476: 						   $safeeval);
1.431     raeburn  1477:             if ($which=~/\w/) {
                   1478:                 $available_texts{$which} = $result;
                   1479:             }
                   1480:             my $otherlangs = &Apache::lonxml::get_param('other',$parstack,
                   1481:                                                         $safeeval);
                   1482:             foreach my $language (split(/\s*\,\s*/,$otherlangs)) {
                   1483:                 if ($language=~/\w/) {
                   1484:                     $available_texts{$language} = $result;
                   1485:                 }
1.427     bisitz   1486:             }
                   1487: 
1.397     albertel 1488: 	}
                   1489: 	return '';
                   1490:     }
                   1491: }
                   1492: 
1.170     www      1493: sub start_instructorcomment {
1.201     albertel 1494:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.170     www      1495: 
                   1496:     my $result;
                   1497: 
1.339     albertel 1498:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1499: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.468     raeburn  1500:         $result=($env{'request.role'}=~/^(in|cc|co|au|ca|li)/);
1.284     albertel 1501: 	if ( (! $result) or ($env{'form.instructor_comments'} eq 'hide')) {
1.201     albertel 1502: 	    my $skip=&Apache::lonxml::get_all_text("/instructorcomment",
                   1503: 						   $parser,$style);
1.170     www      1504: 	    &Apache::lonxml::debug("skipping ahead :$skip: $$parser[-1]");
                   1505: 	}
                   1506: 	$result='';
                   1507:     } elsif ($target eq 'edit') {
                   1508: 	$result .=&Apache::edit::tag_start($target,$token);
                   1509: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1510:     }
                   1511:     return $result;
                   1512: }
                   1513: 
                   1514: sub end_instructorcomment {
1.159     albertel 1515:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1516:     my $result;
                   1517:     if ($target eq "edit") {
                   1518: 	$result.= &Apache::edit::tag_end($target,$token,'');
                   1519:     }
                   1520:     return $result;
1.4       tsai     1521: }
                   1522: 
                   1523: sub start_while {
1.326     albertel 1524:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1525: 
1.160     albertel 1526:     my $result;
1.339     albertel 1527:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1528: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1529: 	my $code = $token->[2]->{'condition'};
1.4       tsai     1530: 
1.160     albertel 1531: 	push( @Apache::structuretags::whileconds, $code);
                   1532: 	if (!$Apache::lonxml::default_homework_loaded) {
                   1533: 	    &Apache::lonxml::default_homework_load($safeeval);
                   1534: 	}
                   1535: 	my $result = &Apache::run::run($code,$safeeval);
1.326     albertel 1536: 	my $bodytext=&Apache::lonxml::get_all_text("/while",$parser,$style);
1.160     albertel 1537: 	push( @Apache::structuretags::whilebody, $bodytext);
1.161     albertel 1538: 	push( @Apache::structuretags::whileline, $token->[5]);
                   1539: 	&Apache::lonxml::debug("s code $code got -$result-");
1.160     albertel 1540: 	if ( $result ) {
                   1541: 	    &Apache::lonxml::newparser($parser,\$bodytext);
                   1542: 	}
                   1543:     } elsif ($target eq 'edit') {
                   1544: 	$result .=&Apache::edit::tag_start($target,$token);
1.211     albertel 1545: 	$result .=&Apache::edit::text_arg(&mt('Test Condition:'),'condition',
1.160     albertel 1546: 					  $token,40);
                   1547: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1548:     } elsif ($target eq 'modified') {
                   1549: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1550: 						     $safeeval,'condition');
                   1551: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
1.159     albertel 1552:     }
1.160     albertel 1553:     return $result;
1.4       tsai     1554: }
                   1555: 
                   1556: sub end_while {
1.159     albertel 1557:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
1.160     albertel 1558:     my $result;
                   1559: 
1.339     albertel 1560:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1561: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.160     albertel 1562: 	my $code = pop(@Apache::structuretags::whileconds);
                   1563: 	my $bodytext = pop(@Apache::structuretags::whilebody);
1.161     albertel 1564: 	my $line = pop(@Apache::structuretags::whileline);
                   1565: 	my $return = &Apache::run::run($code,$safeeval);
                   1566: 	my $starttime=time;
                   1567: 	my $error=0;
                   1568: 	while ($return) {
                   1569: 	    if (time-$starttime >
                   1570: 		$Apache::lonnet::perlvar{'lonScriptTimeout'}) {
1.378     albertel 1571: 		$return = 0; $error=1; next;
1.161     albertel 1572: 	    }
                   1573: 	    $result.=&Apache::scripttag::xmlparse($bodytext);
1.380     albertel 1574: 	    if ($target eq 'grade' || $target eq 'answer' ||
                   1575: 		$target eq 'analyze') {
                   1576: 		# grade/answer/analyze should produce no output but if we
                   1577: 		# are redirecting, the redirecter should know what to do
                   1578: 		# with the output
                   1579: 		if (!$Apache::lonxml::redirection) { undef($result); }
                   1580: 	    }
1.161     albertel 1581: 	    $return = &Apache::run::run($code,$safeeval);
                   1582: 	}
                   1583: 	if ($error) {
1.430     bisitz   1584: 	    &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 1585: 	}
                   1586:     } elsif ($target eq "edit") {
                   1587: 	$result.= &Apache::edit::tag_end($target,$token,'');
1.159     albertel 1588:     }
1.160     albertel 1589:     return $result;
1.1       albertel 1590: }
1.6       tsai     1591: 
1.160     albertel 1592: # <randomlist show="1">
1.6       tsai     1593: #  <tag1>..</tag1>
                   1594: #  <tag2>..</tag2>
                   1595: #  <tag3>..</tag3>
1.160     albertel 1596: #  ...
1.6       tsai     1597: # </randomlist>
                   1598: sub start_randomlist {
1.326     albertel 1599:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1600:     my $result;
1.339     albertel 1601:     if ($target eq 'answer' || $target eq 'grade'   || $target eq 'web' ||
                   1602: 	$target eq 'tex'    || $target eq 'analyze' || $target eq 'webgrade') {
1.331     albertel 1603: 	my $body= &Apache::lonxml::get_all_text("/randomlist",$parser);
1.305     albertel 1604: 	my $b_parser= HTML::LCParser->new(\$body);
                   1605: 	$b_parser->xml_mode(1);
                   1606: 	$b_parser->marked_sections(1);
1.159     albertel 1607: 	my $b_tok;
                   1608: 	my @randomlist;
                   1609: 	my $list_item;
                   1610: 	while($b_tok = $b_parser->get_token() ) {
                   1611: 	    if($b_tok->[0] eq 'S') { # start tag
                   1612: 		# get content of the tag until matching end tag
                   1613: 		# get all text upto the matching tag
                   1614: 		# and push the content into @randomlist
                   1615: 		$list_item = &Apache::lonxml::get_all_text('/'.$b_tok->[1],
                   1616: 							   $b_parser);
                   1617: 		$list_item = "$b_tok->[4]"."$list_item"."</$b_tok->[1]>";
                   1618: 		push(@randomlist,$list_item);
                   1619: 		#  print "<br /><b>START-TAG $b_tok->[1], $b_tok->[4],
                   1620:                 #         $list_item</b>";
                   1621: 	    }
                   1622: 	    if($b_tok->[0] eq 'T') { # text
                   1623: 		# what to do with text in between tags?
                   1624: 		#  print "<b>TEXT $b_tok->[1]</b><br />";
                   1625: 	    }
                   1626: 	    # if($b_tok->[0] eq 'E') { # end tag, should not happen
                   1627: 	    #  print "<b>END-TAG $b_tok->[1]</b><br />";
                   1628: 	    # }
                   1629: 	}
1.303     albertel 1630: 	if (@randomlist) {
                   1631: 	    my @idx_arr = (0 .. $#randomlist);
                   1632: 	    &Apache::structuretags::shuffle(\@idx_arr);
                   1633: 	    my $bodytext = '';
                   1634: 	    my $show=$#randomlist;
                   1635: 	    my $showarg=&Apache::lonxml::get_param('show',$parstack,$safeeval);
                   1636: 	    $showarg--;
                   1637: 	    if ( ($showarg >= 0) && ($showarg < $show) ) { $show = $showarg; }
1.439     raeburn  1638:             if (($target eq 'analyze') && ($env{'form.check_parts_withrandomlist'})) {
                   1639:                 my @currlist;
                   1640:                 my $part = $Apache::inputtags::part;
                   1641:                 if ($part ne '') {
                   1642:                     if (ref($Apache::lonhomework::analyze{'parts_withrandomlist'}) eq 'ARRAY') {
                   1643:                         my @currlist = @{$Apache::lonhomework::analyze{'parts_withrandomlist'}};
                   1644:                         if (!(grep(/^\Q$part\E$/,@currlist))) {
                   1645:                             push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1646:                         }
                   1647:                     } else {
                   1648:                         push(@{$Apache::lonhomework::analyze{'parts_withrandomlist'}},$part);
                   1649:                     }
                   1650:                 }
                   1651:             }
1.303     albertel 1652: 	    for(0 .. $show) {
                   1653: 		$bodytext .= "$randomlist[ $idx_arr[$_] ]";
                   1654: 	    }
                   1655: 	    &Apache::lonxml::newparser($parser,\$bodytext);
1.159     albertel 1656: 	}
                   1657:     } elsif ($target eq 'edit' ) {
                   1658: 	$result .=&Apache::edit::tag_start($target,$token);
                   1659: 	$result .=&Apache::edit::text_arg('Maximum Tags to Show:','show',
                   1660: 					   $token,5);
                   1661: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1662:     } elsif ($target eq 'modified' ) {
                   1663: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   1664: 						     $safeeval,'show');
                   1665: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   1666:     }
                   1667:     return $result;
1.7       tsai     1668: }
                   1669: 
                   1670: sub shuffle {
                   1671:     my $a=shift;
                   1672:     my $i;
1.303     albertel 1673:     if (ref($a) eq 'ARRAY' && @$a) {
1.251     albertel 1674: 	&Apache::response::pushrandomnumber();
1.159     albertel 1675: 	for($i=@$a;--$i;) {
                   1676: 	    my $j=int(&Math::Random::random_uniform() * ($i+1));
                   1677: 	    next if $i == $j;
                   1678: 	    @$a[$i,$j] = @$a[$j,$i];
                   1679: 	}
1.251     albertel 1680: 	&Apache::response::poprandomnumber();
1.7       tsai     1681:     }
1.6       tsai     1682: }
                   1683: 
                   1684: sub end_randomlist {
1.159     albertel 1685:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1686:     my $result;
                   1687:     if ($target eq 'edit' ) {
                   1688: 	$result=&Apache::edit::tag_end($target,$token,
                   1689: 				       'End Randomly Parsed Block');
                   1690:     }
                   1691:     return $result;
1.6       tsai     1692: }
                   1693: 
1.283     albertel 1694: sub ordered_show_check {
                   1695:     my $last_part=$Apache::inputtags::partlist[-2];
                   1696:     my $in_order=
                   1697: 	&Apache::lonnet::EXT('resource.'.$Apache::inputtags::part.'.ordered');
                   1698:     my $in_order_show=1;
                   1699:     if ($last_part ne '0' && lc($in_order) eq 'yes') {
                   1700: 	$in_order_show=&Apache::response::check_status($last_part);
                   1701:     }
                   1702:     return $in_order_show;
                   1703: }
                   1704: 
1.469     www      1705: 
                   1706: sub start_startpartmarker {
                   1707:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1708:     my $result='';
                   1709:     if ($target eq 'edit') {
                   1710:         $result=&Apache::edit::tag_start($target,$token);
                   1711:         $result.=&mt('Marker for the start of a part. Place end marker below to wrap in-between tags into a new part.').'</td></tr>';
                   1712:         $result.=&Apache::edit::end_table();
                   1713: 
                   1714:     } 
                   1715:     return $result;
                   1716: }
                   1717: 
                   1718: sub end_startpartmarker {
                   1719:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1720:     my @result;
                   1721:     if ($target eq 'edit') { $result[1]='no'; }
                   1722:     return @result;
                   1723: }
                   1724: 
                   1725: sub start_endpartmarker {
                   1726:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1727:     my $result='';
                   1728:     if ($target eq 'edit') {
                   1729:         $result=&Apache::edit::tag_start($target,$token);
                   1730:         $result.=&mt('Marker for the end of a part. Place start marker above to wrap in-between tags into a new part.').'</td></tr>';
                   1731:         $result.=&Apache::edit::end_table();
                   1732: 
                   1733:     }
                   1734:     return $result;
                   1735: }
                   1736: 
                   1737: sub end_endpartmarker {
                   1738:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1739:     my @result;
                   1740:     if ($target eq 'edit') { $result[1]='no'; }
                   1741:     return @result;
                   1742: }
                   1743: 
                   1744: 
                   1745: 
                   1746: 
                   1747: 
1.11      albertel 1748: sub start_part {
1.326     albertel 1749:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.321     albertel 1750:     if (!$Apache::lonxml::metamode) {
                   1751: 	&Apache::lonxml::startredirection(); # we'll use redirection to fix up 
                   1752: 	                                     # duedates.
                   1753:     }
1.159     albertel 1754:     my $result='';
1.386     albertel 1755:     my $id= &Apache::lonxml::get_id($parstack,$safeeval);
1.159     albertel 1756:     $Apache::inputtags::part=$id;
1.177     albertel 1757:     push(@Apache::inputtags::partlist,$id);
                   1758:     @Apache::inputtags::response=();
1.159     albertel 1759:     @Apache::inputtags::previous=();
                   1760:     @Apache::inputtags::previous_version=();
1.405     albertel 1761:     &Apache::lonhomework::set_show_problem_status(&get_problem_status($id));
1.403     albertel 1762:     &Apache::response::reset_params();
                   1763: 
1.159     albertel 1764:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.259     albertel 1765:     my $newtype=&Apache::lonnet::EXT("resource.$id.type");
                   1766:     if ($newtype) { $Apache::lonhomework::type=$newtype; }
1.283     albertel 1767:     my $in_order_show=&ordered_show_check();
1.214     albertel 1768:     my $expression='$external::part=\''.$Apache::inputtags::part.'\';';
1.259     albertel 1769:     $expression.='$external::type=\''.$Apache::lonhomework::type.'\';';
1.209     albertel 1770:     &Apache::run::run($expression,$safeeval);
1.159     albertel 1771: 
                   1772:     if ($target eq 'meta') {
1.224     www      1773: 	my $display=&Apache::lonxml::get_param('display',$parstack,$safeeval);
                   1774: 	return &Apache::response::mandatory_part_meta.
                   1775: 	       &Apache::response::meta_parameter_write('display','string',$display,'Part Description');
1.159     albertel 1776:     } elsif ($target eq 'web' || $target eq 'grade' ||
                   1777: 	     $target eq 'answer' || $target eq 'tex') {
1.283     albertel 1778: 	if ($hidden || !$in_order_show) {
1.326     albertel 1779: 	    my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,$style);
1.159     albertel 1780: 	} else {
                   1781: 	    my ($status,$accessmsg) = &Apache::lonhomework::check_access($id);
                   1782: 	    push (@Apache::inputtags::status,$status);
                   1783: 	    my $expression='$external::datestatus="'.$status.'";';
                   1784: 	    $expression.='$external::gradestatus="'.$Apache::lonhomework::history{"resource.$id.solved"}.'";';
                   1785: 	    &Apache::run::run($expression,$safeeval);
1.284     albertel 1786: 	    if ($env{'request.state'} eq 'construct') {
1.241     albertel 1787: 		&set_problem_state($Apache::inputtags::part); 
1.240     albertel 1788: 	    }
1.216     albertel 1789: 	    if (( $status eq 'CLOSED' ) ||
                   1790: 		( $status eq 'UNCHECKEDOUT') ||
1.252     albertel 1791: 		( $status eq 'NOT_YET_VIEWED') ||
1.216     albertel 1792: 		( $status eq 'BANNED') ||
                   1793: 		( $status eq 'UNAVAILABLE') ||
                   1794: 		( $status eq 'INVALID_ACCESS')) {
1.326     albertel 1795: 		my $bodytext=&Apache::lonxml::get_all_text("/part",$parser,
                   1796: 							   $style);
1.159     albertel 1797: 		if ( $target eq "web" ) {
1.211     albertel 1798: 		    $result="<br />".&mt('Part is not open to be viewed. It')." $accessmsg<br />";
1.159     albertel 1799: 		} elsif ( $target eq 'tex' ) {
1.284     albertel 1800: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.211     albertel 1801: 			$result="\\end{minipage}\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\\\begin{minipage}{\\textwidth}";
1.195     sakharuk 1802: 		    } else {
1.211     albertel 1803: 			$result="\\vskip 0 mm ".&mt('Part is not open to be viewed. It')." $accessmsg \\\\";
1.195     sakharuk 1804: 		    }
1.159     albertel 1805: 		}
                   1806: 	    } else {
                   1807: 		if ($target eq 'tex') {
1.284     albertel 1808: 		    if (not $env{'form.problem_split'}=~/yes/) {
1.264     sakharuk 1809: 			if ($$tagstack[-2] eq 'td') {
1.388     foxr     1810: 			    $result.='\noindent \begin{minipage}{\textwidth}\noindent';
1.264     sakharuk 1811: 			} else {
                   1812: 			    $result.='\noindent \end{minipage}\vskip 0 mm \noindent \begin{minipage}{\textwidth}\noindent';
                   1813: 			}
1.195     sakharuk 1814: 		    }
1.159     albertel 1815: 		    my $weight = &Apache::lonnet::EXT("resource.$id.weight");
1.284     albertel 1816: 		    my $allkeys=&Apache::lonnet::metadata($env{'request.uri'},'packages');
1.222     sakharuk 1817: 		    my @allkeys = split /,/,$allkeys;
                   1818: 		    my $allow_print_points = 0;
                   1819: 		    foreach my $partial_key (@allkeys) {
1.230     albertel 1820: 			if ($partial_key=~m/^part_(.*)$/) {
1.222     sakharuk 1821: 			    if ($1 ne '0') {$allow_print_points=1;}
                   1822: 			}
                   1823: 		    }
1.275     albertel 1824: 		    my $maxtries = &Apache::lonnet::EXT("resource.$id.maxtries");
                   1825: 		    if (defined($maxtries) && $maxtries < 0) {
                   1826: 			$allow_print_points=0;
                   1827: 		    }
1.302     albertel 1828: 		    if (lc($env{'course.'.$env{'request.course.id'}.
                   1829: 				    '.disableexampointprint'}) eq 'yes') {
                   1830: 			$allow_print_points=0;
                   1831: 		    }
1.463     foxr     1832: 		    if (($Apache::lonhomework::type eq 'exam') && ($allow_print_points)) { 
                   1833: 			$result .= '\vskip 10mm\fbox{\textit{'.$weight.' pt}}';
                   1834: 
                   1835: 		    }
1.233     www      1836: 		} elsif ($target eq 'web') {
1.356     www      1837: 		    $result.='<a name="'.&escape($Apache::inputtags::part).'" />';
1.159     albertel 1838: 		}
                   1839: 	    }
                   1840: 	}
                   1841:     } elsif ($target eq 'edit') {
                   1842: 	$result.=&Apache::edit::tag_start($target,$token);
                   1843: 	$result.=&Apache::edit::text_arg('Part ID:','id',$token).
                   1844: 	    &Apache::loncommon::help_open_topic("Part_Tag_Edit_Help").
1.224     www      1845: 	    '&nbsp;&nbsp;'.
                   1846: &Apache::edit::text_arg('Displayed Part Description:','display',$token).
1.159     albertel 1847: 		&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   1848:     } elsif ($target eq 'modified') {
                   1849: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
1.225     albertel 1850: 						     $safeeval,'id','display');
1.159     albertel 1851: 	if ($constructtag) {
1.225     albertel 1852: 	    #limiting ids to only letters numbers, and space
1.224     www      1853: 	    $token->[2]->{'id'}=~s/[^A-Za-z0-9 ]//gs;
1.159     albertel 1854: 	    $result = &Apache::edit::rebuild_tag($token);
                   1855: 	}
                   1856:     }
                   1857:     return $result;
1.11      albertel 1858: }
                   1859: 
                   1860: sub end_part {
1.159     albertel 1861:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   1862:     &Apache::lonxml::debug("in end_part $target ");
                   1863:     my $status=$Apache::inputtags::status['-1'];
                   1864:     my $hidden=&Apache::loncommon::check_if_partid_hidden($Apache::inputtags::part);
1.283     albertel 1865:     my $in_order_show=&ordered_show_check();
1.321     albertel 1866:     my $result;
                   1867:     if (!$Apache::lonxml::metamode) {
                   1868: 	$result = &Apache::lonxml::endredirection(); # started in &start_part
1.329     albertel 1869: 	$Apache::lonxml::post_evaluate=0;
1.321     albertel 1870:     }
1.312     albertel 1871:     if ($target eq 'grade') {
1.249     albertel 1872: 	if (($status eq 'CAN_ANSWER' || $Apache::lonhomework::scantronmode) &&
1.283     albertel 1873: 	    !$hidden && $in_order_show) {
1.311     foxr     1874: 	    $result.=&Apache::inputtags::grade;
1.249     albertel 1875: 	} else {
                   1876: 	    # move any submission data to .hidden
                   1877: 	    &Apache::inputtags::hidealldata($Apache::inputtags::part);
                   1878: 	}
1.283     albertel 1879:     } elsif (($target eq 'web' || $target eq 'tex') &&
                   1880: 	     !$hidden && $in_order_show) {
1.159     albertel 1881: 	my $gradestatus=&Apache::inputtags::gradestatus($Apache::inputtags::part,
                   1882: 							$target);
1.212     albertel 1883: 	if ($Apache::lonhomework::type eq 'exam' && $target eq 'tex') {
                   1884: 	    $gradestatus='';
                   1885: 	}
1.311     foxr     1886: 	$result.=$gradestatus;
1.265     sakharuk 1887: 	if ($$tagstack[-2] eq 'td' and $target eq 'tex') {$result.='\end{minipage}';} 
1.181     albertel 1888:     } elsif ($target eq 'edit') {
1.311     foxr     1889: 	$result.=&Apache::edit::end_table();
1.322     albertel 1890:     } elsif ($target eq 'modified') {
                   1891: 	 $result .= $token->[2];
1.159     albertel 1892:     }
                   1893:     pop @Apache::inputtags::status;
                   1894:     $Apache::inputtags::part='';
1.295     albertel 1895:     $Apache::lonhomework::type = $Apache::lonhomework::default_type;
1.159     albertel 1896:     return $result;
1.11      albertel 1897: }
1.1       albertel 1898: 
1.25      albertel 1899: sub start_preduedate {
1.326     albertel 1900:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.339     albertel 1901:     if ($target eq 'web' || $target eq 'grade'    || $target eq 'answer' ||
                   1902: 	$target eq 'tex' || $target eq 'webgrade') {
1.236     albertel 1903: 	&Apache::lonxml::debug("State in preduedate is ". $Apache::inputtags::status['-1']);
1.300     albertel 1904: 	if (!$Apache::lonhomework::scantronmode &&
                   1905: 	    $Apache::inputtags::status['-1'] ne 'CAN_ANSWER' &&
1.236     albertel 1906: 	    $Apache::inputtags::status['-1'] ne 'CANNOT_ANSWER') {
                   1907: 	    &Apache::lonxml::debug("Wha? ". ($Apache::inputtags::status['-1'] ne 'SHOW_ANSWER'));
1.326     albertel 1908: 	    &Apache::lonxml::get_all_text("/preduedate",$parser,$style);
1.159     albertel 1909: 	}
1.24      albertel 1910:     }
1.159     albertel 1911:     return '';
1.24      albertel 1912: }
                   1913: 
1.25      albertel 1914: sub end_preduedate {
1.159     albertel 1915:     return '';
1.24      albertel 1916: }
                   1917: 
1.369     foxr     1918: # In all the modes where <postanswerdate> text is 
                   1919: # displayable,  all we do is eat up the text between the start/stop
                   1920: # tags if the conditions are not right to display it.
1.25      albertel 1921: sub start_postanswerdate {
1.326     albertel 1922:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.370     foxr     1923:     my $pav = &Apache::lonnet::allowed('pav', $env{'request.course.id'}) ||
                   1924: 	&Apache::lonnet::allowed('pav',
                   1925: 			   $env{'request.course.id'}.'/'.$env{'request.course.sec'});
1.369     foxr     1926:     if ($target eq 'web' || $target eq 'grade' || $target eq 'webgrade' ||
1.370     foxr     1927: 	$target eq 'tex' ) {
1.300     albertel 1928: 	if ($Apache::lonhomework::scantronmode ||
1.370     foxr     1929: 	    $Apache::inputtags::status['-1'] ne 'SHOW_ANSWER' ||
                   1930: 	    (($target eq 'tex') && !$pav)) {
1.326     albertel 1931: 	    &Apache::lonxml::get_all_text("/postanswerdate",$parser,$style);
1.159     albertel 1932: 	}
                   1933:     }
                   1934:     return '';
1.24      albertel 1935: }
                   1936: 
1.25      albertel 1937: sub end_postanswerdate {
1.159     albertel 1938:     return '';
1.24      albertel 1939: }
                   1940: 
1.25      albertel 1941: sub start_notsolved {
1.326     albertel 1942:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1943:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
1.339     albertel 1944: 	$target eq 'tex' || $target eq 'webgrade') {
1.159     albertel 1945: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
                   1946: 	&Apache::lonxml::debug("not solved has :$gradestatus:");
1.239     albertel 1947: 	if ($gradestatus =~ /^correct/ &&
                   1948: 	    &Apache::response::show_answer()) {
1.159     albertel 1949: 	    &Apache::lonxml::debug("skipping");
1.326     albertel 1950: 	    &Apache::lonxml::get_all_text("/notsolved",$parser,$style);
1.159     albertel 1951: 	}
1.24      albertel 1952:     }
1.159     albertel 1953:     return '';
1.24      albertel 1954: }
                   1955: 
1.25      albertel 1956: sub end_notsolved {
1.159     albertel 1957:     return '';
1.24      albertel 1958: }
                   1959: 
                   1960: sub start_solved {
1.326     albertel 1961:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 1962:     if ($target eq 'web' || $target eq 'grade' || $target eq 'answer' ||
                   1963: 	$target eq 'tex') {
                   1964: 	my $gradestatus=$Apache::lonhomework::history{"resource.$Apache::inputtags::part.solved"};
1.239     albertel 1965: 	if ($gradestatus !~ /^correct/ ||
                   1966: 	    !&Apache::response::show_answer()) {
1.326     albertel 1967: 	    &Apache::lonxml::get_all_text("/solved",$parser,$style);
1.159     albertel 1968: 	}
1.24      albertel 1969:     }
1.159     albertel 1970:     return '';
1.24      albertel 1971: }
                   1972: 
                   1973: sub end_solved {
1.248     albertel 1974:     return '';
                   1975: }
                   1976: 
                   1977: sub start_problemtype {
1.326     albertel 1978:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.248     albertel 1979:     my $result;
1.339     albertel 1980:     if ($target eq 'web' || $target eq 'grade'   || $target eq 'answer' ||
                   1981: 	$target eq 'tex' || $target eq 'analyze' || $target eq 'webgrade') {
1.248     albertel 1982: 	my $mode=lc(&Apache::lonxml::get_param('mode',$parstack,$safeeval));
                   1983: 	if (!defined($mode)) { $mode='show'; }
                   1984: 	my $for=&Apache::lonxml::get_param('for',$parstack,$safeeval);
                   1985: 	my $found=0;
                   1986: 	foreach my $type (split(',',$for)) {
                   1987: 	    if ($Apache::lonhomework::type eq lc($type)) { $found=1; }
                   1988: 	}
                   1989: 	if ($mode eq 'show' && !$found) {
1.326     albertel 1990: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1991: 	}
                   1992: 	if ($mode eq 'hide' && $found) {
1.326     albertel 1993: 	    &Apache::lonxml::get_all_text("/problemtype",$parser,$style);
1.248     albertel 1994: 	}
                   1995:     } elsif ($target eq 'edit') {
                   1996: 	$result .=&Apache::edit::tag_start($target,$token);
                   1997: 	$result.=&Apache::edit::select_arg('Mode:','mode',
                   1998: 					   [['show','Show'],
                   1999: 					    ['hide','Hide']]
                   2000: 					   ,$token);
                   2001: 	$result .=&Apache::edit::checked_arg('When used as type(s):','for',
                   2002: 					     [ ['exam','Exam/Quiz Problem'],
                   2003: 					       ['survey','Survey'],
1.465     raeburn  2004:                                                ['surveycred','Survey (with credit)'],
                   2005:                                                ['anonsurvey','Anonymous Survey'],
                   2006:                                                ['anonsurveycred','Anonymous Survey (with credit)'],
1.428     raeburn  2007: 					       ['problem','Homework Problem'],
                   2008:                                                ['practice','Practice Problem'] ]
1.248     albertel 2009: 					     ,$token);
                   2010: 	$result .=&Apache::edit::end_row().&Apache::edit::start_spanning_row();
                   2011:     } elsif ($target eq 'modified') {
                   2012: 	my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                   2013: 						     $safeeval,'mode','for');
                   2014: 	if ($constructtag) { $result = &Apache::edit::rebuild_tag($token); }
                   2015:     }
                   2016:     return $result;
                   2017: }
                   2018: 
                   2019: sub end_problemtype {
1.159     albertel 2020:     return '';
1.24      albertel 2021: }
1.34      albertel 2022: 
                   2023: sub start_startouttext {
1.159     albertel 2024:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2025:     my @result=(''.'');
                   2026:     if ($target eq 'edit' || $target eq 'modified' ) { @result=('','no'); }
1.404     albertel 2027:     
                   2028:     my $nesting = 
                   2029: 	&Apache::lonxml::set_state('outtext',
                   2030: 				   &Apache::lonxml::get_state('outtext')+1);
                   2031:     if ($nesting > 1 && $env{'request.state'} eq 'construct') {
                   2032: 	&Apache::lonxml::error("Nesting of &lt;startouttext /&gt; not allowed, on line ".$token->[5]);
                   2033:     }
1.159     albertel 2034:     return (@result);
1.34      albertel 2035: }
1.159     albertel 2036: 
1.34      albertel 2037: sub end_startouttext {
1.326     albertel 2038:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
1.159     albertel 2039:     my $result='';
                   2040:     my $text='';
                   2041:     if ($target eq 'edit') {
1.424     foxr     2042: 	my $areaid = 'homework_edit_'.$Apache::lonxml::curdepth;
1.326     albertel 2043: 	$text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.437     raeburn  2044: 	$result.=&Apache::edit::start_table($token)."<tr><td>".&mt('Text Block')."</td>"
1.438     bisitz   2045:                  .'<td><span class="LC_nobreak">'.&mt('Delete?').' '
1.437     raeburn  2046:                  .&Apache::edit::deletelist($target,$token)
                   2047:                  .'</span></td>';
1.425     raeburn  2048:         unless ($env{'environment.wysiwygeditor'} eq 'on') {
1.434     foxr     2049: 	    $result .= '<td align="left">'
                   2050: 		.&Apache::lonhtmlcommon::dragmath_button($areaid,1)
                   2051: 		.'</td>'
                   2052: 		.'<td>'
                   2053: 		.&Apache::edit::insertlist($target,$token)
                   2054: 		.'</td>';
                   2055: 	}
1.425     raeburn  2056: 	$result.='<td align="right" valign="top">' .
1.434     foxr     2057: 	    &Apache::loncommon::helpLatexCheatsheet().
1.159     albertel 2058: 		 &Apache::edit::end_row().
1.362     albertel 2059:                  &Apache::edit::start_spanning_row()."\n".
1.255     www      2060: 		 &Apache::edit::editfield($token->[1],$text,"",80,8,1);
1.159     albertel 2061:     }
                   2062:     if ($target eq 'modified') {
1.219     albertel 2063: 	$result='<startouttext />'.&Apache::edit::modifiedfield("endouttext",$parser);
1.159     albertel 2064:     }
                   2065:     if ($target eq 'tex') {
                   2066: 	$result .= '\noindent ';
                   2067:     }
                   2068:     return $result;
1.34      albertel 2069: }
1.159     albertel 2070: 
1.34      albertel 2071: sub start_endouttext {
1.159     albertel 2072:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2073:     my $result='';
                   2074:     if ($target eq "edit" ) { $result="</td></tr>".&Apache::edit::end_table()."\n"; }
                   2075:     if ($target eq "modified") {
                   2076: 	$result='<endouttext />'.
1.377     albertel 2077: 	    &Apache::edit::handle_insertafter('startouttext');
                   2078:     }
1.404     albertel 2079: 
                   2080:     my $nesting = 
                   2081: 	&Apache::lonxml::set_state('outtext',
                   2082: 				   &Apache::lonxml::get_state('outtext')-1);
                   2083:     if ($nesting < 0 && $env{'request.state'} eq 'construct') {
                   2084: 	&Apache::lonxml::error(" Extraneous &lt;endouttext /&gt; not allowed on line ".$token->[5]);
                   2085: 	&Apache::lonxml::set_state('outtext', 0);
                   2086:     }
1.159     albertel 2087:     return $result;
1.34      albertel 2088: }
1.159     albertel 2089: 
1.34      albertel 2090: sub end_endouttext {
1.159     albertel 2091:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2092:     my @result=('','');
                   2093:     if ($target eq "edit" || $target eq 'modified') { @result=('','no'); }
                   2094:     return (@result);
1.34      albertel 2095: }
1.159     albertel 2096: 
1.45      albertel 2097: sub delete_startouttext {
1.326     albertel 2098:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval,$style)=@_;
                   2099:     #  my $text=&Apache::lonxml::get_all_text("endouttext",$parser,$style);
1.159     albertel 2100:     my $text=$$parser['-1']->get_text("/endouttext");
                   2101:     my $ntoken=$$parser['-1']->get_token();
                   2102:     &Apache::lonxml::debug("Deleting :$text: and :$ntoken->[0]:$ntoken->[1]:$ntoken->[2]: for startouttext");
                   2103:     &Apache::lonxml::end_tag($tagstack,$parstack,$ntoken);
                   2104:     # Deleting 2 parallel tag pairs, but we need the numbers later to look like
                   2105:     # they did the last time round
                   2106:     &Apache::lonxml::increasedepth($ntoken);
                   2107:     &Apache::lonxml::decreasedepth($ntoken);
                   2108:     return 1;
1.193     www      2109: }
                   2110: 
                   2111: sub start_simpleeditbutton {
                   2112:     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
                   2113:     my $result='';
1.284     albertel 2114:     if (($env{'form.simple_edit_button'} ne 'off') &&
1.273     albertel 2115: 	($target eq 'web') &&
1.330     albertel 2116:         (&Apache::lonnet::allowed('mdc',$env{'request.course.id'}))) {
1.284     albertel 2117:         my $url=$env{'request.noversionuri'};
1.193     www      2118:         $url=~s/\?.*$//;
1.367     albertel 2119: 	my ($symb) = &Apache::lonnet::whichuser();
1.451     bisitz   2120: #       Warning makes more sense and is more important on edit screen
1.442     bisitz   2121: #       $result='<p class="LC_warning">'
                   2122: #              .&mt('Note: it can take up to 10 minutes for changes to take effect for all users.')
                   2123: #              .&Apache::loncommon::help_open_topic('Caching')
                   2124: #              .'</p>';
1.451     bisitz   2125:         $result.=&Apache::lonhtmlcommon::start_funclist()
                   2126:                 .&Apache::lonhtmlcommon::add_item_funclist(
                   2127:                      '<a href="'.$url.'/smpedit?symb='.&escape($symb).'">'
                   2128:                     .&mt('Edit').'</a>')
                   2129:                 .&Apache::lonhtmlcommon::end_funclist();
1.442     bisitz   2130: 
1.193     www      2131:     }
                   2132:     return $result;
                   2133: }
                   2134: 
                   2135: sub end_simpleeditbutton {
                   2136:     return '';
1.45      albertel 2137: }
1.34      albertel 2138: 
1.428     raeburn  2139: sub practice_problem_header {
                   2140:     return '<span class="LC_info"><h3>'.&mt('Practice Problem').'</h3></span>'.
                   2141:            '<span class="LC_info">'.&mt('Submissions are not permanently recorded').
                   2142:            '</span>';
                   2143: }
                   2144: 
1.1       albertel 2145: 1;
                   2146: __END__
1.435     jms      2147: 
                   2148: =pod
                   2149: 
                   2150: =back
                   2151: 
                   2152: =cut

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